/* RFC5082: Generalized Ttl Security Mechanism */
#define IPV6_MINHOPCOUNT 73
+#define IPV6_ORIGDSTADDR 74
+#define IPV6_RECVORIGDSTADDR IPV6_ORIGDSTADDR
+#define IPV6_TRANSPARENT 75
+
/*
* Multicast Routing:
* see include/linux/mroute6.h.
/*
* IPVS Connection Flags
+ * Only flags 0..15 are sent to backup server
*/
#define IP_VS_CONN_F_FWD_MASK 0x0007 /* mask for the fwd methods */
#define IP_VS_CONN_F_MASQ 0x0000 /* masquerading/NAT */
#define IP_VS_CONN_F_TEMPLATE 0x1000 /* template, not connection */
#define IP_VS_CONN_F_ONE_PACKET 0x2000 /* forward only one packet */
+/* Flags that are not sent to backup server start from bit 16 */
+#define IP_VS_CONN_F_NFCT (1 << 16) /* use netfilter conntrack */
+
+/* Connection flags from destination that can be changed by user space */
+#define IP_VS_CONN_F_DEST_MASK (IP_VS_CONN_F_FWD_MASK | \
+ IP_VS_CONN_F_ONE_PACKET | \
+ IP_VS_CONN_F_NFCT | \
+ 0)
+
#define IP_VS_SCHEDNAME_MAXLEN 16
+#define IP_VS_PENAME_MAXLEN 16
#define IP_VS_IFNAME_MAXLEN 16
+#define IP_VS_PEDATA_MAXLEN 255
/*
* The struct ip_vs_service_user and struct ip_vs_dest_user are
IPVS_SVC_ATTR_NETMASK, /* persistent netmask */
IPVS_SVC_ATTR_STATS, /* nested attribute for service stats */
+
+ IPVS_SVC_ATTR_PE_NAME, /* name of ct retriever */
+
__IPVS_SVC_ATTR_MAX,
};
odstopts:1,
rxflow:1,
rxtclass:1,
- rxpmtu:1;
+ rxpmtu:1,
+ rxorigdstaddr:1;
+ /* 2 bits hole */
} bits;
__u16 all;
} rxopt;
enum ip_conntrack_expect_events {
IPEXP_NEW, /* new expectation */
+ IPEXP_DESTROY, /* destroyed expectation */
};
+/* expectation flags */
+#define NF_CT_EXPECT_PERMANENT 0x1
+#define NF_CT_EXPECT_INACTIVE 0x2
+#define NF_CT_EXPECT_USERSPACE 0x4
+
#ifdef __KERNEL__
struct ip_conntrack_stat {
unsigned int searched;
SIP_HDR_VIA_TCP,
SIP_HDR_EXPIRES,
SIP_HDR_CONTENT_LENGTH,
+ SIP_HDR_CALL_ID,
};
enum sdp_header_types {
CTA_EXPECT_ID,
CTA_EXPECT_HELP_NAME,
CTA_EXPECT_ZONE,
+ CTA_EXPECT_FLAGS,
__CTA_EXPECT_MAX
};
#define CTA_EXPECT_MAX (__CTA_EXPECT_MAX - 1)
int verdict;
};
+struct xt_error_target {
+ struct xt_entry_target target;
+ char errorname[XT_FUNCTION_MAXNAMELEN];
+};
+
/* The argument to IPT_SO_GET_REVISION_*. Returns highest revision
* kernel supports, if >= revision. */
struct xt_get_revision {
-#ifndef _XT_TPROXY_H_target
-#define _XT_TPROXY_H_target
+#ifndef _XT_TPROXY_H
+#define _XT_TPROXY_H
/* TPROXY target is capable of marking the packet to perform
* redirection. We can get rid of that whenever we get support for
__be16 lport;
};
-#endif /* _XT_TPROXY_H_target */
+struct xt_tproxy_target_info_v1 {
+ u_int32_t mark_mask;
+ u_int32_t mark_value;
+ union nf_inet_addr laddr;
+ __be16 lport;
+};
+
+#endif /* _XT_TPROXY_H */
#include <linux/netfilter/x_tables.h>
+#ifndef __KERNEL__
#define ARPT_FUNCTION_MAXNAMELEN XT_FUNCTION_MAXNAMELEN
#define ARPT_TABLE_MAXNAMELEN XT_TABLE_MAXNAMELEN
+#define arpt_entry_target xt_entry_target
+#define arpt_standard_target xt_standard_target
+#define arpt_error_target xt_error_target
+#define ARPT_CONTINUE XT_CONTINUE
+#define ARPT_RETURN XT_RETURN
+#define arpt_counters_info xt_counters_info
+#define arpt_counters xt_counters
+#define ARPT_STANDARD_TARGET XT_STANDARD_TARGET
+#define ARPT_ERROR_TARGET XT_ERROR_TARGET
+#define ARPT_ENTRY_ITERATE(entries, size, fn, args...) \
+ XT_ENTRY_ITERATE(struct arpt_entry, entries, size, fn, ## args)
+#endif
#define ARPT_DEV_ADDR_LEN_MAX 16
u_int16_t invflags;
};
-#define arpt_entry_target xt_entry_target
-#define arpt_standard_target xt_standard_target
-
/* Values for "flag" field in struct arpt_ip (general arp structure).
* No flags defined yet.
*/
#define ARPT_SO_GET_REVISION_TARGET (ARPT_BASE_CTL + 3)
#define ARPT_SO_GET_MAX (ARPT_SO_GET_REVISION_TARGET)
-/* CONTINUE verdict for targets */
-#define ARPT_CONTINUE XT_CONTINUE
-
-/* For standard target */
-#define ARPT_RETURN XT_RETURN
-
/* The argument to ARPT_SO_GET_INFO */
struct arpt_getinfo {
/* Which table: caller fills this in. */
- char name[ARPT_TABLE_MAXNAMELEN];
+ char name[XT_TABLE_MAXNAMELEN];
/* Kernel fills these in. */
/* Which hook entry points are valid: bitmask */
/* The argument to ARPT_SO_SET_REPLACE. */
struct arpt_replace {
/* Which table. */
- char name[ARPT_TABLE_MAXNAMELEN];
+ char name[XT_TABLE_MAXNAMELEN];
/* Which hook entry points are valid: bitmask. You can't
change this. */
struct arpt_entry entries[0];
};
-/* The argument to ARPT_SO_ADD_COUNTERS. */
-#define arpt_counters_info xt_counters_info
-#define arpt_counters xt_counters
-
/* The argument to ARPT_SO_GET_ENTRIES. */
struct arpt_get_entries {
/* Which table: user fills this in. */
- char name[ARPT_TABLE_MAXNAMELEN];
+ char name[XT_TABLE_MAXNAMELEN];
/* User fills this in: total entry size. */
unsigned int size;
struct arpt_entry entrytable[0];
};
-/* Standard return verdict, or do jump. */
-#define ARPT_STANDARD_TARGET XT_STANDARD_TARGET
-/* Error verdict. */
-#define ARPT_ERROR_TARGET XT_ERROR_TARGET
-
/* Helper functions */
-static __inline__ struct arpt_entry_target *arpt_get_target(struct arpt_entry *e)
+static __inline__ struct xt_entry_target *arpt_get_target(struct arpt_entry *e)
{
return (void *)e + e->target_offset;
}
-#ifndef __KERNEL__
-/* fn returns 0 to continue iteration */
-#define ARPT_ENTRY_ITERATE(entries, size, fn, args...) \
- XT_ENTRY_ITERATE(struct arpt_entry, entries, size, fn, ## args)
-#endif
-
/*
* Main firewall chains definitions and global var's definitions.
*/
/* Standard entry. */
struct arpt_standard {
struct arpt_entry entry;
- struct arpt_standard_target target;
-};
-
-struct arpt_error_target {
- struct arpt_entry_target target;
- char errorname[ARPT_FUNCTION_MAXNAMELEN];
+ struct xt_standard_target target;
};
struct arpt_error {
struct arpt_entry entry;
- struct arpt_error_target target;
+ struct xt_error_target target;
};
#define ARPT_ENTRY_INIT(__size) \
#define ARPT_STANDARD_INIT(__verdict) \
{ \
.entry = ARPT_ENTRY_INIT(sizeof(struct arpt_standard)), \
- .target = XT_TARGET_INIT(ARPT_STANDARD_TARGET, \
- sizeof(struct arpt_standard_target)), \
+ .target = XT_TARGET_INIT(XT_STANDARD_TARGET, \
+ sizeof(struct xt_standard_target)), \
.target.verdict = -(__verdict) - 1, \
}
#define ARPT_ERROR_INIT \
{ \
.entry = ARPT_ENTRY_INIT(sizeof(struct arpt_error)), \
- .target = XT_TARGET_INIT(ARPT_ERROR_TARGET, \
- sizeof(struct arpt_error_target)), \
+ .target = XT_TARGET_INIT(XT_ERROR_TARGET, \
+ sizeof(struct xt_error_target)), \
.target.errorname = "ERROR", \
}
const struct net_device *out,
struct xt_table *table);
-#define ARPT_ALIGN(s) XT_ALIGN(s)
-
#ifdef CONFIG_COMPAT
#include <net/compat.h>
unsigned char elems[0];
};
-static inline struct arpt_entry_target *
+static inline struct xt_entry_target *
compat_arpt_get_target(struct compat_arpt_entry *e)
{
return (void *)e + e->target_offset;
}
-#define COMPAT_ARPT_ALIGN(s) COMPAT_XT_ALIGN(s)
-
#endif /* CONFIG_COMPAT */
#endif /*__KERNEL__*/
#endif /* _ARPTABLES_H */
header-y += ebt_arp.h
header-y += ebt_arpreply.h
header-y += ebt_ip.h
+header-y += ebt_ip6.h
header-y += ebt_limit.h
header-y += ebt_log.h
header-y += ebt_mark_m.h
header-y += ebt_mark_t.h
header-y += ebt_nat.h
+header-y += ebt_nflog.h
header-y += ebt_pkttype.h
header-y += ebt_redirect.h
header-y += ebt_stp.h
#include <linux/netfilter/x_tables.h>
+#ifndef __KERNEL__
#define IPT_FUNCTION_MAXNAMELEN XT_FUNCTION_MAXNAMELEN
#define IPT_TABLE_MAXNAMELEN XT_TABLE_MAXNAMELEN
#define ipt_match xt_match
#define ipt_target xt_target
#define ipt_table xt_table
#define ipt_get_revision xt_get_revision
+#define ipt_entry_match xt_entry_match
+#define ipt_entry_target xt_entry_target
+#define ipt_standard_target xt_standard_target
+#define ipt_error_target xt_error_target
+#define ipt_counters xt_counters
+#define IPT_CONTINUE XT_CONTINUE
+#define IPT_RETURN XT_RETURN
+
+/* This group is older than old (iptables < v1.4.0-rc1~89) */
+#include <linux/netfilter/xt_tcpudp.h>
+#define ipt_udp xt_udp
+#define ipt_tcp xt_tcp
+#define IPT_TCP_INV_SRCPT XT_TCP_INV_SRCPT
+#define IPT_TCP_INV_DSTPT XT_TCP_INV_DSTPT
+#define IPT_TCP_INV_FLAGS XT_TCP_INV_FLAGS
+#define IPT_TCP_INV_OPTION XT_TCP_INV_OPTION
+#define IPT_TCP_INV_MASK XT_TCP_INV_MASK
+#define IPT_UDP_INV_SRCPT XT_UDP_INV_SRCPT
+#define IPT_UDP_INV_DSTPT XT_UDP_INV_DSTPT
+#define IPT_UDP_INV_MASK XT_UDP_INV_MASK
+
+/* The argument to IPT_SO_ADD_COUNTERS. */
+#define ipt_counters_info xt_counters_info
+/* Standard return verdict, or do jump. */
+#define IPT_STANDARD_TARGET XT_STANDARD_TARGET
+/* Error verdict. */
+#define IPT_ERROR_TARGET XT_ERROR_TARGET
+
+/* fn returns 0 to continue iteration */
+#define IPT_MATCH_ITERATE(e, fn, args...) \
+ XT_MATCH_ITERATE(struct ipt_entry, e, fn, ## args)
+
+/* fn returns 0 to continue iteration */
+#define IPT_ENTRY_ITERATE(entries, size, fn, args...) \
+ XT_ENTRY_ITERATE(struct ipt_entry, entries, size, fn, ## args)
+#endif
/* Yes, Virginia, you have to zero the padding. */
struct ipt_ip {
u_int8_t invflags;
};
-#define ipt_entry_match xt_entry_match
-#define ipt_entry_target xt_entry_target
-#define ipt_standard_target xt_standard_target
-
-#define ipt_counters xt_counters
-
/* Values for "flag" field in struct ipt_ip (general ip structure). */
#define IPT_F_FRAG 0x01 /* Set if rule is a fragment rule */
#define IPT_F_GOTO 0x02 /* Set if jump is a goto */
#define IPT_SO_GET_REVISION_TARGET (IPT_BASE_CTL + 3)
#define IPT_SO_GET_MAX IPT_SO_GET_REVISION_TARGET
-#define IPT_CONTINUE XT_CONTINUE
-#define IPT_RETURN XT_RETURN
-
-#include <linux/netfilter/xt_tcpudp.h>
-#define ipt_udp xt_udp
-#define ipt_tcp xt_tcp
-
-#define IPT_TCP_INV_SRCPT XT_TCP_INV_SRCPT
-#define IPT_TCP_INV_DSTPT XT_TCP_INV_DSTPT
-#define IPT_TCP_INV_FLAGS XT_TCP_INV_FLAGS
-#define IPT_TCP_INV_OPTION XT_TCP_INV_OPTION
-#define IPT_TCP_INV_MASK XT_TCP_INV_MASK
-
-#define IPT_UDP_INV_SRCPT XT_UDP_INV_SRCPT
-#define IPT_UDP_INV_DSTPT XT_UDP_INV_DSTPT
-#define IPT_UDP_INV_MASK XT_UDP_INV_MASK
-
/* ICMP matching stuff */
struct ipt_icmp {
u_int8_t type; /* type to match */
/* The argument to IPT_SO_GET_INFO */
struct ipt_getinfo {
/* Which table: caller fills this in. */
- char name[IPT_TABLE_MAXNAMELEN];
+ char name[XT_TABLE_MAXNAMELEN];
/* Kernel fills these in. */
/* Which hook entry points are valid: bitmask */
/* The argument to IPT_SO_SET_REPLACE. */
struct ipt_replace {
/* Which table. */
- char name[IPT_TABLE_MAXNAMELEN];
+ char name[XT_TABLE_MAXNAMELEN];
/* Which hook entry points are valid: bitmask. You can't
change this. */
struct ipt_entry entries[0];
};
-/* The argument to IPT_SO_ADD_COUNTERS. */
-#define ipt_counters_info xt_counters_info
-
/* The argument to IPT_SO_GET_ENTRIES. */
struct ipt_get_entries {
/* Which table: user fills this in. */
- char name[IPT_TABLE_MAXNAMELEN];
+ char name[XT_TABLE_MAXNAMELEN];
/* User fills this in: total entry size. */
unsigned int size;
struct ipt_entry entrytable[0];
};
-/* Standard return verdict, or do jump. */
-#define IPT_STANDARD_TARGET XT_STANDARD_TARGET
-/* Error verdict. */
-#define IPT_ERROR_TARGET XT_ERROR_TARGET
-
/* Helper functions */
-static __inline__ struct ipt_entry_target *
+static __inline__ struct xt_entry_target *
ipt_get_target(struct ipt_entry *e)
{
return (void *)e + e->target_offset;
}
-#ifndef __KERNEL__
-/* fn returns 0 to continue iteration */
-#define IPT_MATCH_ITERATE(e, fn, args...) \
- XT_MATCH_ITERATE(struct ipt_entry, e, fn, ## args)
-
-/* fn returns 0 to continue iteration */
-#define IPT_ENTRY_ITERATE(entries, size, fn, args...) \
- XT_ENTRY_ITERATE(struct ipt_entry, entries, size, fn, ## args)
-#endif
-
/*
* Main firewall chains definitions and global var's definitions.
*/
/* Standard entry. */
struct ipt_standard {
struct ipt_entry entry;
- struct ipt_standard_target target;
-};
-
-struct ipt_error_target {
- struct ipt_entry_target target;
- char errorname[IPT_FUNCTION_MAXNAMELEN];
+ struct xt_standard_target target;
};
struct ipt_error {
struct ipt_entry entry;
- struct ipt_error_target target;
+ struct xt_error_target target;
};
#define IPT_ENTRY_INIT(__size) \
#define IPT_STANDARD_INIT(__verdict) \
{ \
.entry = IPT_ENTRY_INIT(sizeof(struct ipt_standard)), \
- .target = XT_TARGET_INIT(IPT_STANDARD_TARGET, \
+ .target = XT_TARGET_INIT(XT_STANDARD_TARGET, \
sizeof(struct xt_standard_target)), \
.target.verdict = -(__verdict) - 1, \
}
#define IPT_ERROR_INIT \
{ \
.entry = IPT_ENTRY_INIT(sizeof(struct ipt_error)), \
- .target = XT_TARGET_INIT(IPT_ERROR_TARGET, \
- sizeof(struct ipt_error_target)), \
+ .target = XT_TARGET_INIT(XT_ERROR_TARGET, \
+ sizeof(struct xt_error_target)), \
.target.errorname = "ERROR", \
}
const struct net_device *out,
struct xt_table *table);
-#define IPT_ALIGN(s) XT_ALIGN(s)
-
#ifdef CONFIG_COMPAT
#include <net/compat.h>
};
/* Helper functions */
-static inline struct ipt_entry_target *
+static inline struct xt_entry_target *
compat_ipt_get_target(struct compat_ipt_entry *e)
{
return (void *)e + e->target_offset;
}
-#define COMPAT_IPT_ALIGN(s) COMPAT_XT_ALIGN(s)
-
#endif /* CONFIG_COMPAT */
#endif /*__KERNEL__*/
#endif /* _IPTABLES_H */
#include <linux/netfilter/x_tables.h>
+#ifndef __KERNEL__
#define IP6T_FUNCTION_MAXNAMELEN XT_FUNCTION_MAXNAMELEN
#define IP6T_TABLE_MAXNAMELEN XT_TABLE_MAXNAMELEN
-
#define ip6t_match xt_match
#define ip6t_target xt_target
#define ip6t_table xt_table
#define ip6t_get_revision xt_get_revision
+#define ip6t_entry_match xt_entry_match
+#define ip6t_entry_target xt_entry_target
+#define ip6t_standard_target xt_standard_target
+#define ip6t_error_target xt_error_target
+#define ip6t_counters xt_counters
+#define IP6T_CONTINUE XT_CONTINUE
+#define IP6T_RETURN XT_RETURN
+
+/* Pre-iptables-1.4.0 */
+#include <linux/netfilter/xt_tcpudp.h>
+#define ip6t_tcp xt_tcp
+#define ip6t_udp xt_udp
+#define IP6T_TCP_INV_SRCPT XT_TCP_INV_SRCPT
+#define IP6T_TCP_INV_DSTPT XT_TCP_INV_DSTPT
+#define IP6T_TCP_INV_FLAGS XT_TCP_INV_FLAGS
+#define IP6T_TCP_INV_OPTION XT_TCP_INV_OPTION
+#define IP6T_TCP_INV_MASK XT_TCP_INV_MASK
+#define IP6T_UDP_INV_SRCPT XT_UDP_INV_SRCPT
+#define IP6T_UDP_INV_DSTPT XT_UDP_INV_DSTPT
+#define IP6T_UDP_INV_MASK XT_UDP_INV_MASK
+
+#define ip6t_counters_info xt_counters_info
+#define IP6T_STANDARD_TARGET XT_STANDARD_TARGET
+#define IP6T_ERROR_TARGET XT_ERROR_TARGET
+#define IP6T_MATCH_ITERATE(e, fn, args...) \
+ XT_MATCH_ITERATE(struct ip6t_entry, e, fn, ## args)
+#define IP6T_ENTRY_ITERATE(entries, size, fn, args...) \
+ XT_ENTRY_ITERATE(struct ip6t_entry, entries, size, fn, ## args)
+#endif
/* Yes, Virginia, you have to zero the padding. */
struct ip6t_ip6 {
u_int8_t invflags;
};
-#define ip6t_entry_match xt_entry_match
-#define ip6t_entry_target xt_entry_target
-#define ip6t_standard_target xt_standard_target
-
-#define ip6t_counters xt_counters
-
/* Values for "flag" field in struct ip6t_ip6 (general ip6 structure). */
#define IP6T_F_PROTO 0x01 /* Set if rule cares about upper
protocols */
/* Standard entry */
struct ip6t_standard {
struct ip6t_entry entry;
- struct ip6t_standard_target target;
-};
-
-struct ip6t_error_target {
- struct ip6t_entry_target target;
- char errorname[IP6T_FUNCTION_MAXNAMELEN];
+ struct xt_standard_target target;
};
struct ip6t_error {
struct ip6t_entry entry;
- struct ip6t_error_target target;
+ struct xt_error_target target;
};
#define IP6T_ENTRY_INIT(__size) \
#define IP6T_STANDARD_INIT(__verdict) \
{ \
.entry = IP6T_ENTRY_INIT(sizeof(struct ip6t_standard)), \
- .target = XT_TARGET_INIT(IP6T_STANDARD_TARGET, \
- sizeof(struct ip6t_standard_target)), \
+ .target = XT_TARGET_INIT(XT_STANDARD_TARGET, \
+ sizeof(struct xt_standard_target)), \
.target.verdict = -(__verdict) - 1, \
}
#define IP6T_ERROR_INIT \
{ \
.entry = IP6T_ENTRY_INIT(sizeof(struct ip6t_error)), \
- .target = XT_TARGET_INIT(IP6T_ERROR_TARGET, \
- sizeof(struct ip6t_error_target)), \
+ .target = XT_TARGET_INIT(XT_ERROR_TARGET, \
+ sizeof(struct xt_error_target)), \
.target.errorname = "ERROR", \
}
#define IP6T_SO_GET_REVISION_TARGET (IP6T_BASE_CTL + 5)
#define IP6T_SO_GET_MAX IP6T_SO_GET_REVISION_TARGET
-/* CONTINUE verdict for targets */
-#define IP6T_CONTINUE XT_CONTINUE
-
-/* For standard target */
-#define IP6T_RETURN XT_RETURN
-
-/* TCP/UDP matching stuff */
-#include <linux/netfilter/xt_tcpudp.h>
-
-#define ip6t_tcp xt_tcp
-#define ip6t_udp xt_udp
-
-/* Values for "inv" field in struct ipt_tcp. */
-#define IP6T_TCP_INV_SRCPT XT_TCP_INV_SRCPT
-#define IP6T_TCP_INV_DSTPT XT_TCP_INV_DSTPT
-#define IP6T_TCP_INV_FLAGS XT_TCP_INV_FLAGS
-#define IP6T_TCP_INV_OPTION XT_TCP_INV_OPTION
-#define IP6T_TCP_INV_MASK XT_TCP_INV_MASK
-
-/* Values for "invflags" field in struct ipt_udp. */
-#define IP6T_UDP_INV_SRCPT XT_UDP_INV_SRCPT
-#define IP6T_UDP_INV_DSTPT XT_UDP_INV_DSTPT
-#define IP6T_UDP_INV_MASK XT_UDP_INV_MASK
-
/* ICMP matching stuff */
struct ip6t_icmp {
u_int8_t type; /* type to match */
/* The argument to IP6T_SO_GET_INFO */
struct ip6t_getinfo {
/* Which table: caller fills this in. */
- char name[IP6T_TABLE_MAXNAMELEN];
+ char name[XT_TABLE_MAXNAMELEN];
/* Kernel fills these in. */
/* Which hook entry points are valid: bitmask */
/* The argument to IP6T_SO_SET_REPLACE. */
struct ip6t_replace {
/* Which table. */
- char name[IP6T_TABLE_MAXNAMELEN];
+ char name[XT_TABLE_MAXNAMELEN];
/* Which hook entry points are valid: bitmask. You can't
change this. */
struct ip6t_entry entries[0];
};
-/* The argument to IP6T_SO_ADD_COUNTERS. */
-#define ip6t_counters_info xt_counters_info
-
/* The argument to IP6T_SO_GET_ENTRIES. */
struct ip6t_get_entries {
/* Which table: user fills this in. */
- char name[IP6T_TABLE_MAXNAMELEN];
+ char name[XT_TABLE_MAXNAMELEN];
/* User fills this in: total entry size. */
unsigned int size;
struct ip6t_entry entrytable[0];
};
-/* Standard return verdict, or do jump. */
-#define IP6T_STANDARD_TARGET XT_STANDARD_TARGET
-/* Error verdict. */
-#define IP6T_ERROR_TARGET XT_ERROR_TARGET
-
/* Helper functions */
-static __inline__ struct ip6t_entry_target *
+static __inline__ struct xt_entry_target *
ip6t_get_target(struct ip6t_entry *e)
{
return (void *)e + e->target_offset;
}
-#ifndef __KERNEL__
-/* fn returns 0 to continue iteration */
-#define IP6T_MATCH_ITERATE(e, fn, args...) \
- XT_MATCH_ITERATE(struct ip6t_entry, e, fn, ## args)
-
-/* fn returns 0 to continue iteration */
-#define IP6T_ENTRY_ITERATE(entries, size, fn, args...) \
- XT_ENTRY_ITERATE(struct ip6t_entry, entries, size, fn, ## args)
-#endif
-
/*
* Main firewall chains definitions and global var's definitions.
*/
extern int ipv6_find_hdr(const struct sk_buff *skb, unsigned int *offset,
int target, unsigned short *fragoff);
-#define IP6T_ALIGN(s) XT_ALIGN(s)
-
#ifdef CONFIG_COMPAT
#include <net/compat.h>
unsigned char elems[0];
};
-static inline struct ip6t_entry_target *
+static inline struct xt_entry_target *
compat_ip6t_get_target(struct compat_ip6t_entry *e)
{
return (void *)e + e->target_offset;
}
-#define COMPAT_IP6T_ALIGN(s) COMPAT_XT_ALIGN(s)
-
#endif /* CONFIG_COMPAT */
#endif /*__KERNEL__*/
#endif /* _IP6_TABLES_H */
}
/* Caller must disable local BH processing. */
-extern void __inet_inherit_port(struct sock *sk, struct sock *child);
+extern int __inet_inherit_port(struct sock *sk, struct sock *child);
extern void inet_put_port(struct sock *sk);
#include <linux/ip.h>
#include <linux/ipv6.h> /* for struct ipv6hdr */
#include <net/ipv6.h> /* for ipv6_addr_copy */
-
+#if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
+#include <net/netfilter/nf_conntrack.h>
+#endif
/* Connections' size value needed by ip_vs_ctl.c */
extern int ip_vs_conn_tab_size;
if (net_ratelimit()) \
printk(KERN_DEBUG pr_fmt(msg), ##__VA_ARGS__); \
} while (0)
-#define IP_VS_DBG_PKT(level, pp, skb, ofs, msg) \
+#define IP_VS_DBG_PKT(level, af, pp, skb, ofs, msg) \
do { \
if (level <= ip_vs_get_debug_level()) \
- pp->debug_packet(pp, skb, ofs, msg); \
+ pp->debug_packet(af, pp, skb, ofs, msg); \
} while (0)
-#define IP_VS_DBG_RL_PKT(level, pp, skb, ofs, msg) \
+#define IP_VS_DBG_RL_PKT(level, af, pp, skb, ofs, msg) \
do { \
if (level <= ip_vs_get_debug_level() && \
net_ratelimit()) \
- pp->debug_packet(pp, skb, ofs, msg); \
+ pp->debug_packet(af, pp, skb, ofs, msg); \
} while (0)
#else /* NO DEBUGGING at ALL */
#define IP_VS_DBG_BUF(level, msg...) do {} while (0)
#define IP_VS_ERR_BUF(msg...) do {} while (0)
#define IP_VS_DBG(level, msg...) do {} while (0)
#define IP_VS_DBG_RL(msg...) do {} while (0)
-#define IP_VS_DBG_PKT(level, pp, skb, ofs, msg) do {} while (0)
-#define IP_VS_DBG_RL_PKT(level, pp, skb, ofs, msg) do {} while (0)
+#define IP_VS_DBG_PKT(level, af, pp, skb, ofs, msg) do {} while (0)
+#define IP_VS_DBG_RL_PKT(level, af, pp, skb, ofs, msg) do {} while (0)
#endif
#define IP_VS_BUG() BUG()
int (*app_conn_bind)(struct ip_vs_conn *cp);
- void (*debug_packet)(struct ip_vs_protocol *pp,
+ void (*debug_packet)(int af, struct ip_vs_protocol *pp,
const struct sk_buff *skb,
int offset,
const char *msg);
extern struct ip_vs_protocol * ip_vs_proto_get(unsigned short proto);
+struct ip_vs_conn_param {
+ const union nf_inet_addr *caddr;
+ const union nf_inet_addr *vaddr;
+ __be16 cport;
+ __be16 vport;
+ __u16 protocol;
+ u16 af;
+
+ const struct ip_vs_pe *pe;
+ char *pe_data;
+ __u8 pe_data_len;
+};
+
/*
* IP_VS structure allocated for each dynamically scheduled connection
*/
union nf_inet_addr caddr; /* client address */
union nf_inet_addr vaddr; /* virtual address */
union nf_inet_addr daddr; /* destination address */
+ volatile __u32 flags; /* status flags */
__be16 cport;
__be16 vport;
__be16 dport;
/* Flags and state transition */
spinlock_t lock; /* lock for state transition */
- volatile __u16 flags; /* status flags */
volatile __u16 state; /* state info */
volatile __u16 old_state; /* old state, to be used for
* state transition triggerd
/* packet transmitter for different forwarding methods. If it
mangles the packet, it must return NF_DROP or better NF_STOLEN,
otherwise this must be changed to a sk_buff **.
+ NF_ACCEPT can be returned when destination is local.
*/
int (*packet_xmit)(struct sk_buff *skb, struct ip_vs_conn *cp,
struct ip_vs_protocol *pp);
void *app_data; /* Application private data */
struct ip_vs_seq in_seq; /* incoming seq. struct */
struct ip_vs_seq out_seq; /* outgoing seq. struct */
+
+ char *pe_data;
+ __u8 pe_data_len;
};
/* virtual service options */
char *sched_name;
+ char *pe_name;
unsigned flags; /* virtual service flags */
unsigned timeout; /* persistent timeout in sec */
u32 netmask; /* persistent netmask */
struct ip_vs_scheduler *scheduler; /* bound scheduler object */
rwlock_t sched_lock; /* lock sched_data */
void *sched_data; /* scheduler application data */
+
+ /* alternate persistence engine */
+ struct ip_vs_pe *pe;
};
spinlock_t dst_lock; /* lock of dst_cache */
struct dst_entry *dst_cache; /* destination cache entry */
u32 dst_rtos; /* RT_TOS(tos) for dst */
+ u32 dst_cookie;
+#ifdef CONFIG_IP_VS_IPV6
+ struct in6_addr dst_saddr;
+#endif
/* for virtual service */
struct ip_vs_service *svc; /* service it belongs to */
const struct sk_buff *skb);
};
+/* The persistence engine object */
+struct ip_vs_pe {
+ struct list_head n_list; /* d-linked list head */
+ char *name; /* scheduler name */
+ atomic_t refcnt; /* reference counter */
+ struct module *module; /* THIS_MODULE/NULL */
+
+ /* get the connection template, if any */
+ int (*fill_param)(struct ip_vs_conn_param *p, struct sk_buff *skb);
+ bool (*ct_match)(const struct ip_vs_conn_param *p,
+ struct ip_vs_conn *ct);
+ u32 (*hashkey_raw)(const struct ip_vs_conn_param *p, u32 initval,
+ bool inverse);
+ int (*show_pe_data)(const struct ip_vs_conn *cp, char *buf);
+};
/*
* The application module object (a.k.a. app incarnation)
__be16 port; /* port number in net order */
atomic_t usecnt; /* usage counter */
- /* output hook: return false if can't linearize. diff set for TCP. */
+ /*
+ * output hook: Process packet in inout direction, diff set for TCP.
+ * Return: 0=Error, 1=Payload Not Mangled/Mangled but checksum is ok,
+ * 2=Mangled but checksum was not updated
+ */
int (*pkt_out)(struct ip_vs_app *, struct ip_vs_conn *,
struct sk_buff *, int *diff);
- /* input hook: return false if can't linearize. diff set for TCP. */
+ /*
+ * input hook: Process packet in outin direction, diff set for TCP.
+ * Return: 0=Error, 1=Payload Not Mangled/Mangled but checksum is ok,
+ * 2=Mangled but checksum was not updated
+ */
int (*pkt_in)(struct ip_vs_app *, struct ip_vs_conn *,
struct sk_buff *, int *diff);
IP_VS_DIR_LAST,
};
-extern struct ip_vs_conn *ip_vs_conn_in_get
-(int af, int protocol, const union nf_inet_addr *s_addr, __be16 s_port,
- const union nf_inet_addr *d_addr, __be16 d_port);
+static inline void ip_vs_conn_fill_param(int af, int protocol,
+ const union nf_inet_addr *caddr,
+ __be16 cport,
+ const union nf_inet_addr *vaddr,
+ __be16 vport,
+ struct ip_vs_conn_param *p)
+{
+ p->af = af;
+ p->protocol = protocol;
+ p->caddr = caddr;
+ p->cport = cport;
+ p->vaddr = vaddr;
+ p->vport = vport;
+ p->pe = NULL;
+ p->pe_data = NULL;
+}
-extern struct ip_vs_conn *ip_vs_ct_in_get
-(int af, int protocol, const union nf_inet_addr *s_addr, __be16 s_port,
- const union nf_inet_addr *d_addr, __be16 d_port);
+struct ip_vs_conn *ip_vs_conn_in_get(const struct ip_vs_conn_param *p);
+struct ip_vs_conn *ip_vs_ct_in_get(const struct ip_vs_conn_param *p);
struct ip_vs_conn * ip_vs_conn_in_get_proto(int af, const struct sk_buff *skb,
struct ip_vs_protocol *pp,
unsigned int proto_off,
int inverse);
-extern struct ip_vs_conn *ip_vs_conn_out_get
-(int af, int protocol, const union nf_inet_addr *s_addr, __be16 s_port,
- const union nf_inet_addr *d_addr, __be16 d_port);
+struct ip_vs_conn *ip_vs_conn_out_get(const struct ip_vs_conn_param *p);
struct ip_vs_conn * ip_vs_conn_out_get_proto(int af, const struct sk_buff *skb,
struct ip_vs_protocol *pp,
extern void ip_vs_conn_put(struct ip_vs_conn *cp);
extern void ip_vs_conn_fill_cport(struct ip_vs_conn *cp, __be16 cport);
-extern struct ip_vs_conn *
-ip_vs_conn_new(int af, int proto, const union nf_inet_addr *caddr, __be16 cport,
- const union nf_inet_addr *vaddr, __be16 vport,
- const union nf_inet_addr *daddr, __be16 dport, unsigned flags,
- struct ip_vs_dest *dest);
+struct ip_vs_conn *ip_vs_conn_new(const struct ip_vs_conn_param *p,
+ const union nf_inet_addr *daddr,
+ __be16 dport, unsigned flags,
+ struct ip_vs_dest *dest);
extern void ip_vs_conn_expire_now(struct ip_vs_conn *cp);
extern const char * ip_vs_state_name(__u16 proto, int state);
extern int ip_vs_app_init(void);
extern void ip_vs_app_cleanup(void);
+void ip_vs_bind_pe(struct ip_vs_service *svc, struct ip_vs_pe *pe);
+void ip_vs_unbind_pe(struct ip_vs_service *svc);
+int register_ip_vs_pe(struct ip_vs_pe *pe);
+int unregister_ip_vs_pe(struct ip_vs_pe *pe);
+extern struct ip_vs_pe *ip_vs_pe_get(const char *name);
+extern void ip_vs_pe_put(struct ip_vs_pe *pe);
/*
* IPVS protocol functions (from ip_vs_proto.c)
ip_vs_set_state_timeout(int *table, int num, const char *const *names,
const char *name, int to);
extern void
-ip_vs_tcpudp_debug_packet(struct ip_vs_protocol *pp, const struct sk_buff *skb,
+ip_vs_tcpudp_debug_packet(int af, struct ip_vs_protocol *pp,
+ const struct sk_buff *skb,
int offset, const char *msg);
extern struct ip_vs_protocol ip_vs_protocol_tcp;
extern struct ip_vs_scheduler *ip_vs_scheduler_get(const char *sched_name);
extern void ip_vs_scheduler_put(struct ip_vs_scheduler *scheduler);
extern struct ip_vs_conn *
-ip_vs_schedule(struct ip_vs_service *svc, const struct sk_buff *skb);
+ip_vs_schedule(struct ip_vs_service *svc, struct sk_buff *skb,
+ struct ip_vs_protocol *pp, int *ignored);
extern int ip_vs_leave(struct ip_vs_service *svc, struct sk_buff *skb,
struct ip_vs_protocol *pp);
extern int sysctl_ip_vs_expire_quiescent_template;
extern int sysctl_ip_vs_sync_threshold[2];
extern int sysctl_ip_vs_nat_icmp_send;
+extern int sysctl_ip_vs_conntrack;
+extern int sysctl_ip_vs_snat_reroute;
extern struct ip_vs_stats ip_vs_stats;
extern const struct ctl_path net_vs_ctl_path[];
return csum_partial(diff, sizeof(diff), oldsum);
}
+/*
+ * Forget current conntrack (unconfirmed) and attach notrack entry
+ */
+static inline void ip_vs_notrack(struct sk_buff *skb)
+{
+#if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
+ enum ip_conntrack_info ctinfo;
+ struct nf_conn *ct = ct = nf_ct_get(skb, &ctinfo);
+
+ if (!ct || !nf_ct_is_untracked(ct)) {
+ nf_reset(skb);
+ skb->nfct = &nf_ct_untracked_get()->ct_general;
+ skb->nfctinfo = IP_CT_NEW;
+ nf_conntrack_get(skb->nfct);
+ }
+#endif
+}
+
+#ifdef CONFIG_IP_VS_NFCT
+/*
+ * Netfilter connection tracking
+ * (from ip_vs_nfct.c)
+ */
+static inline int ip_vs_conntrack_enabled(void)
+{
+ return sysctl_ip_vs_conntrack;
+}
+
extern void ip_vs_update_conntrack(struct sk_buff *skb, struct ip_vs_conn *cp,
int outin);
+extern int ip_vs_confirm_conntrack(struct sk_buff *skb, struct ip_vs_conn *cp);
+extern void ip_vs_nfct_expect_related(struct sk_buff *skb, struct nf_conn *ct,
+ struct ip_vs_conn *cp, u_int8_t proto,
+ const __be16 port, int from_rs);
+extern void ip_vs_conn_drop_conntrack(struct ip_vs_conn *cp);
+
+#else
+
+static inline int ip_vs_conntrack_enabled(void)
+{
+ return 0;
+}
+
+static inline void ip_vs_update_conntrack(struct sk_buff *skb,
+ struct ip_vs_conn *cp, int outin)
+{
+}
+
+static inline int ip_vs_confirm_conntrack(struct sk_buff *skb,
+ struct ip_vs_conn *cp)
+{
+ return NF_ACCEPT;
+}
+
+static inline void ip_vs_conn_drop_conntrack(struct ip_vs_conn *cp)
+{
+}
+/* CONFIG_IP_VS_NFCT */
+#endif
#endif /* __KERNEL__ */
--- /dev/null
+#ifndef _NF_DEFRAG_IPV6_H
+#define _NF_DEFRAG_IPV6_H
+
+extern void nf_defrag_ipv6_enable(void);
+
+#endif /* _NF_DEFRAG_IPV6_H */
#define NF_CT_EXPECT_CLASS_DEFAULT 0
-#define NF_CT_EXPECT_PERMANENT 0x1
-#define NF_CT_EXPECT_INACTIVE 0x2
-
int nf_conntrack_expect_init(struct net *net);
void nf_conntrack_expect_fini(struct net *net);
nf_ct_find_expectation(struct net *net, u16 zone,
const struct nf_conntrack_tuple *tuple);
-void nf_ct_unlink_expect(struct nf_conntrack_expect *exp);
+void nf_ct_unlink_expect_report(struct nf_conntrack_expect *exp,
+ u32 pid, int report);
+static inline void nf_ct_unlink_expect(struct nf_conntrack_expect *exp)
+{
+ nf_ct_unlink_expect_report(exp, 0, 0);
+}
+
void nf_ct_remove_expectations(struct nf_conn *ct);
void nf_ct_unexpect_related(struct nf_conntrack_expect *exp);
+void nf_ct_remove_userspace_expectations(void);
/* Allocate space for an expectation: this is mandatory before calling
nf_ct_expect_related. You will have to call put afterwards. */
extern int nf_nat_protocol_register(const struct nf_nat_protocol *proto);
extern void nf_nat_protocol_unregister(const struct nf_nat_protocol *proto);
-extern const struct nf_nat_protocol *nf_nat_proto_find_get(u_int8_t protocol);
-extern void nf_nat_proto_put(const struct nf_nat_protocol *proto);
-
/* Built-in protocols. */
extern const struct nf_nat_protocol nf_nat_protocol_tcp;
extern const struct nf_nat_protocol nf_nat_protocol_udp;
#include <linux/in.h>
#include <linux/skbuff.h>
#include <net/sock.h>
-#include <net/inet_sock.h>
+#include <net/inet_hashtables.h>
+#include <net/inet6_hashtables.h>
#include <net/tcp.h>
+#define NFT_LOOKUP_ANY 0
+#define NFT_LOOKUP_LISTENER 1
+#define NFT_LOOKUP_ESTABLISHED 2
+
/* look up and get a reference to a matching socket */
-extern struct sock *
+
+
+/* This function is used by the 'TPROXY' target and the 'socket'
+ * match. The following lookups are supported:
+ *
+ * Explicit TProxy target rule
+ * ===========================
+ *
+ * This is used when the user wants to intercept a connection matching
+ * an explicit iptables rule. In this case the sockets are assumed
+ * matching in preference order:
+ *
+ * - match: if there's a fully established connection matching the
+ * _packet_ tuple, it is returned, assuming the redirection
+ * already took place and we process a packet belonging to an
+ * established connection
+ *
+ * - match: if there's a listening socket matching the redirection
+ * (e.g. on-port & on-ip of the connection), it is returned,
+ * regardless if it was bound to 0.0.0.0 or an explicit
+ * address. The reasoning is that if there's an explicit rule, it
+ * does not really matter if the listener is bound to an interface
+ * or to 0. The user already stated that he wants redirection
+ * (since he added the rule).
+ *
+ * "socket" match based redirection (no specific rule)
+ * ===================================================
+ *
+ * There are connections with dynamic endpoints (e.g. FTP data
+ * connection) that the user is unable to add explicit rules
+ * for. These are taken care of by a generic "socket" rule. It is
+ * assumed that the proxy application is trusted to open such
+ * connections without explicit iptables rule (except of course the
+ * generic 'socket' rule). In this case the following sockets are
+ * matched in preference order:
+ *
+ * - match: if there's a fully established connection matching the
+ * _packet_ tuple
+ *
+ * - match: if there's a non-zero bound listener (possibly with a
+ * non-local address) We don't accept zero-bound listeners, since
+ * then local services could intercept traffic going through the
+ * box.
+ *
+ * Please note that there's an overlap between what a TPROXY target
+ * and a socket match will match. Normally if you have both rules the
+ * "socket" match will be the first one, effectively all packets
+ * belonging to established connections going through that one.
+ */
+static inline struct sock *
nf_tproxy_get_sock_v4(struct net *net, const u8 protocol,
const __be32 saddr, const __be32 daddr,
const __be16 sport, const __be16 dport,
- const struct net_device *in, bool listening);
+ const struct net_device *in, int lookup_type)
+{
+ struct sock *sk;
+
+ /* look up socket */
+ switch (protocol) {
+ case IPPROTO_TCP:
+ switch (lookup_type) {
+ case NFT_LOOKUP_ANY:
+ sk = __inet_lookup(net, &tcp_hashinfo,
+ saddr, sport, daddr, dport,
+ in->ifindex);
+ break;
+ case NFT_LOOKUP_LISTENER:
+ sk = inet_lookup_listener(net, &tcp_hashinfo,
+ daddr, dport,
+ in->ifindex);
+
+ /* NOTE: we return listeners even if bound to
+ * 0.0.0.0, those are filtered out in
+ * xt_socket, since xt_TPROXY needs 0 bound
+ * listeners too */
+
+ break;
+ case NFT_LOOKUP_ESTABLISHED:
+ sk = inet_lookup_established(net, &tcp_hashinfo,
+ saddr, sport, daddr, dport,
+ in->ifindex);
+ break;
+ default:
+ WARN_ON(1);
+ sk = NULL;
+ break;
+ }
+ break;
+ case IPPROTO_UDP:
+ sk = udp4_lib_lookup(net, saddr, sport, daddr, dport,
+ in->ifindex);
+ if (sk && lookup_type != NFT_LOOKUP_ANY) {
+ int connected = (sk->sk_state == TCP_ESTABLISHED);
+ int wildcard = (inet_sk(sk)->inet_rcv_saddr == 0);
+
+ /* NOTE: we return listeners even if bound to
+ * 0.0.0.0, those are filtered out in
+ * xt_socket, since xt_TPROXY needs 0 bound
+ * listeners too */
+ if ((lookup_type == NFT_LOOKUP_ESTABLISHED && (!connected || wildcard)) ||
+ (lookup_type == NFT_LOOKUP_LISTENER && connected)) {
+ sock_put(sk);
+ sk = NULL;
+ }
+ }
+ break;
+ default:
+ WARN_ON(1);
+ sk = NULL;
+ }
+
+ pr_debug("tproxy socket lookup: proto %u %08x:%u -> %08x:%u, lookup type: %d, sock %p\n",
+ protocol, ntohl(saddr), ntohs(sport), ntohl(daddr), ntohs(dport), lookup_type, sk);
+
+ return sk;
+}
+
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+static inline struct sock *
+nf_tproxy_get_sock_v6(struct net *net, const u8 protocol,
+ const struct in6_addr *saddr, const struct in6_addr *daddr,
+ const __be16 sport, const __be16 dport,
+ const struct net_device *in, int lookup_type)
+{
+ struct sock *sk;
+
+ /* look up socket */
+ switch (protocol) {
+ case IPPROTO_TCP:
+ switch (lookup_type) {
+ case NFT_LOOKUP_ANY:
+ sk = inet6_lookup(net, &tcp_hashinfo,
+ saddr, sport, daddr, dport,
+ in->ifindex);
+ break;
+ case NFT_LOOKUP_LISTENER:
+ sk = inet6_lookup_listener(net, &tcp_hashinfo,
+ daddr, ntohs(dport),
+ in->ifindex);
+
+ /* NOTE: we return listeners even if bound to
+ * 0.0.0.0, those are filtered out in
+ * xt_socket, since xt_TPROXY needs 0 bound
+ * listeners too */
+
+ break;
+ case NFT_LOOKUP_ESTABLISHED:
+ sk = __inet6_lookup_established(net, &tcp_hashinfo,
+ saddr, sport, daddr, ntohs(dport),
+ in->ifindex);
+ break;
+ default:
+ WARN_ON(1);
+ sk = NULL;
+ break;
+ }
+ break;
+ case IPPROTO_UDP:
+ sk = udp6_lib_lookup(net, saddr, sport, daddr, dport,
+ in->ifindex);
+ if (sk && lookup_type != NFT_LOOKUP_ANY) {
+ int connected = (sk->sk_state == TCP_ESTABLISHED);
+ int wildcard = ipv6_addr_any(&inet6_sk(sk)->rcv_saddr);
+
+ /* NOTE: we return listeners even if bound to
+ * 0.0.0.0, those are filtered out in
+ * xt_socket, since xt_TPROXY needs 0 bound
+ * listeners too */
+ if ((lookup_type == NFT_LOOKUP_ESTABLISHED && (!connected || wildcard)) ||
+ (lookup_type == NFT_LOOKUP_LISTENER && connected)) {
+ sock_put(sk);
+ sk = NULL;
+ }
+ }
+ break;
+ default:
+ WARN_ON(1);
+ sk = NULL;
+ }
+
+ pr_debug("tproxy socket lookup: proto %u %pI6:%u -> %pI6:%u, lookup type: %d, sock %p\n",
+ protocol, saddr, ntohs(sport), daddr, ntohs(dport), lookup_type, sk);
+
+ return sk;
+}
+#endif
static inline void
nf_tproxy_put_sock(struct sock *sk)
--- /dev/null
+#define S_SIZE (1024 - (sizeof(unsigned int) + 1))
+
+struct sbuff {
+ unsigned int count;
+ char buf[S_SIZE + 1];
+};
+static struct sbuff emergency, *emergency_ptr = &emergency;
+
+static int sb_add(struct sbuff *m, const char *f, ...)
+{
+ va_list args;
+ int len;
+
+ if (likely(m->count < S_SIZE)) {
+ va_start(args, f);
+ len = vsnprintf(m->buf + m->count, S_SIZE - m->count, f, args);
+ va_end(args);
+ if (likely(m->count + len < S_SIZE)) {
+ m->count += len;
+ return 0;
+ }
+ }
+ m->count = S_SIZE;
+ printk_once(KERN_ERR KBUILD_MODNAME " please increase S_SIZE\n");
+ return -1;
+}
+
+static struct sbuff *sb_open(void)
+{
+ struct sbuff *m = kmalloc(sizeof(*m), GFP_ATOMIC);
+
+ if (unlikely(!m)) {
+ local_bh_disable();
+ do {
+ m = xchg(&emergency_ptr, NULL);
+ } while (!m);
+ }
+ m->count = 0;
+ return m;
+}
+
+static void sb_close(struct sbuff *m)
+{
+ m->buf[m->count] = 0;
+ printk("%s\n", m->buf);
+
+ if (likely(m != &emergency))
+ kfree(m);
+ else {
+ xchg(&emergency_ptr, m);
+ local_bh_enable();
+ }
+}
+
extern struct sock *udp4_lib_lookup(struct net *net, __be32 saddr, __be16 sport,
__be32 daddr, __be16 dport,
int dif);
+extern struct sock *udp6_lib_lookup(struct net *net, const struct in6_addr *saddr, __be16 sport,
+ const struct in6_addr *daddr, __be16 dport,
+ int dif);
/*
* SNMP statistics for UDP and UDP-Lite
newsk = dccp_create_openreq_child(sk, req, skb);
if (newsk == NULL)
- goto exit;
+ goto exit_nonewsk;
sk_setup_caps(newsk, dst);
dccp_sync_mss(newsk, dst_mtu(dst));
+ if (__inet_inherit_port(sk, newsk) < 0) {
+ sock_put(newsk);
+ goto exit;
+ }
__inet_hash_nolisten(newsk, NULL);
- __inet_inherit_port(sk, newsk);
return newsk;
exit_overflow:
NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_LISTENOVERFLOWS);
+exit_nonewsk:
+ dst_release(dst);
exit:
NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_LISTENDROPS);
- dst_release(dst);
return NULL;
}
newsk = dccp_create_openreq_child(sk, req, skb);
if (newsk == NULL)
- goto out;
+ goto out_nonewsk;
/*
* No need to charge this sock to the relevant IPv6 refcnt debug socks
newinet->inet_daddr = newinet->inet_saddr = LOOPBACK4_IPV6;
newinet->inet_rcv_saddr = LOOPBACK4_IPV6;
+ if (__inet_inherit_port(sk, newsk) < 0) {
+ sock_put(newsk);
+ goto out;
+ }
__inet6_hash(newsk, NULL);
- __inet_inherit_port(sk, newsk);
return newsk;
out_overflow:
NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_LISTENOVERFLOWS);
+out_nonewsk:
+ dst_release(dst);
out:
NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_LISTENDROPS);
if (opt != NULL && opt != np->opt)
sock_kfree_s(sk, opt, opt->tot_len);
- dst_release(dst);
return NULL;
}
}
EXPORT_SYMBOL(inet_put_port);
-void __inet_inherit_port(struct sock *sk, struct sock *child)
+int __inet_inherit_port(struct sock *sk, struct sock *child)
{
struct inet_hashinfo *table = sk->sk_prot->h.hashinfo;
- const int bhash = inet_bhashfn(sock_net(sk), inet_sk(child)->inet_num,
+ unsigned short port = inet_sk(child)->inet_num;
+ const int bhash = inet_bhashfn(sock_net(sk), port,
table->bhash_size);
struct inet_bind_hashbucket *head = &table->bhash[bhash];
struct inet_bind_bucket *tb;
spin_lock(&head->lock);
tb = inet_csk(sk)->icsk_bind_hash;
+ if (tb->port != port) {
+ /* NOTE: using tproxy and redirecting skbs to a proxy
+ * on a different listener port breaks the assumption
+ * that the listener socket's icsk_bind_hash is the same
+ * as that of the child socket. We have to look up or
+ * create a new bind bucket for the child here. */
+ struct hlist_node *node;
+ inet_bind_bucket_for_each(tb, node, &head->chain) {
+ if (net_eq(ib_net(tb), sock_net(sk)) &&
+ tb->port == port)
+ break;
+ }
+ if (!node) {
+ tb = inet_bind_bucket_create(table->bind_bucket_cachep,
+ sock_net(sk), head, port);
+ if (!tb) {
+ spin_unlock(&head->lock);
+ return -ENOMEM;
+ }
+ }
+ }
sk_add_bind_node(child, &tb->owners);
inet_csk(child)->icsk_bind_hash = tb;
spin_unlock(&head->lock);
+
+ return 0;
}
EXPORT_SYMBOL_GPL(__inet_inherit_port);
config IP_NF_TARGET_TTL
tristate '"TTL" target support'
- depends on NETFILTER_ADVANCED
+ depends on NETFILTER_ADVANCED && IP_NF_MANGLE
select NETFILTER_XT_TARGET_HL
---help---
- This is a backwards-compat option for the user's convenience
+ This is a backwards-compatible option for the user's convenience
(e.g. when running oldconfig). It selects
CONFIG_NETFILTER_XT_TARGET_HL.
return NF_DROP;
}
-static inline const struct arpt_entry_target *
+static inline const struct xt_entry_target *
arpt_get_target_c(const struct arpt_entry *e)
{
return arpt_get_target((struct arpt_entry *)e);
arp = arp_hdr(skb);
do {
- const struct arpt_entry_target *t;
+ const struct xt_entry_target *t;
if (!arp_packet_match(arp, skb->dev, indev, outdev, &e->arp)) {
e = arpt_next_entry(e);
if (!t->u.kernel.target->target) {
int v;
- v = ((struct arpt_standard_target *)t)->verdict;
+ v = ((struct xt_standard_target *)t)->verdict;
if (v < 0) {
/* Pop from stack? */
- if (v != ARPT_RETURN) {
+ if (v != XT_RETURN) {
verdict = (unsigned)(-v) - 1;
break;
}
/* Target might have changed stuff. */
arp = arp_hdr(skb);
- if (verdict == ARPT_CONTINUE)
+ if (verdict == XT_CONTINUE)
e = arpt_next_entry(e);
else
/* Verdict */
e->counters.pcnt = pos;
for (;;) {
- const struct arpt_standard_target *t
+ const struct xt_standard_target *t
= (void *)arpt_get_target_c(e);
int visited = e->comefrom & (1 << hook);
/* Unconditional return/END. */
if ((e->target_offset == sizeof(struct arpt_entry) &&
(strcmp(t->target.u.user.name,
- ARPT_STANDARD_TARGET) == 0) &&
+ XT_STANDARD_TARGET) == 0) &&
t->verdict < 0 && unconditional(&e->arp)) ||
visited) {
unsigned int oldpos, size;
if ((strcmp(t->target.u.user.name,
- ARPT_STANDARD_TARGET) == 0) &&
+ XT_STANDARD_TARGET) == 0) &&
t->verdict < -NF_MAX_VERDICT - 1) {
duprintf("mark_source_chains: bad "
"negative verdict (%i)\n",
int newpos = t->verdict;
if (strcmp(t->target.u.user.name,
- ARPT_STANDARD_TARGET) == 0 &&
+ XT_STANDARD_TARGET) == 0 &&
newpos >= 0) {
if (newpos > newinfo->size -
sizeof(struct arpt_entry)) {
static inline int check_entry(const struct arpt_entry *e, const char *name)
{
- const struct arpt_entry_target *t;
+ const struct xt_entry_target *t;
if (!arp_checkentry(&e->arp)) {
duprintf("arp_tables: arp check failed %p %s.\n", e, name);
return -EINVAL;
}
- if (e->target_offset + sizeof(struct arpt_entry_target) > e->next_offset)
+ if (e->target_offset + sizeof(struct xt_entry_target) > e->next_offset)
return -EINVAL;
t = arpt_get_target_c(e);
static inline int check_target(struct arpt_entry *e, const char *name)
{
- struct arpt_entry_target *t = arpt_get_target(e);
+ struct xt_entry_target *t = arpt_get_target(e);
int ret;
struct xt_tgchk_param par = {
.table = name,
static inline int
find_check_entry(struct arpt_entry *e, const char *name, unsigned int size)
{
- struct arpt_entry_target *t;
+ struct xt_entry_target *t;
struct xt_target *target;
int ret;
static bool check_underflow(const struct arpt_entry *e)
{
- const struct arpt_entry_target *t;
+ const struct xt_entry_target *t;
unsigned int verdict;
if (!unconditional(&e->arp))
t = arpt_get_target_c(e);
if (strcmp(t->u.user.name, XT_STANDARD_TARGET) != 0)
return false;
- verdict = ((struct arpt_standard_target *)t)->verdict;
+ verdict = ((struct xt_standard_target *)t)->verdict;
verdict = -verdict - 1;
return verdict == NF_DROP || verdict == NF_ACCEPT;
}
}
if (e->next_offset
- < sizeof(struct arpt_entry) + sizeof(struct arpt_entry_target)) {
+ < sizeof(struct arpt_entry) + sizeof(struct xt_entry_target)) {
duprintf("checking: element %p size %u\n",
e, e->next_offset);
return -EINVAL;
static inline void cleanup_entry(struct arpt_entry *e)
{
struct xt_tgdtor_param par;
- struct arpt_entry_target *t;
+ struct xt_entry_target *t;
t = arpt_get_target(e);
par.target = t->u.kernel.target;
/* FIXME: use iterator macros --RR */
/* ... then go back and fix counters and names */
for (off = 0, num = 0; off < total_size; off += e->next_offset, num++){
- const struct arpt_entry_target *t;
+ const struct xt_entry_target *t;
e = (struct arpt_entry *)(loc_cpu_entry + off);
if (copy_to_user(userptr + off
t = arpt_get_target_c(e);
if (copy_to_user(userptr + off + e->target_offset
- + offsetof(struct arpt_entry_target,
+ + offsetof(struct xt_entry_target,
u.user.name),
t->u.kernel.target->name,
strlen(t->u.kernel.target->name)+1) != 0) {
const struct xt_table_info *info,
const void *base, struct xt_table_info *newinfo)
{
- const struct arpt_entry_target *t;
+ const struct xt_entry_target *t;
unsigned int entry_offset;
int off, i, ret;
static int get_info(struct net *net, void __user *user,
const int *len, int compat)
{
- char name[ARPT_TABLE_MAXNAMELEN];
+ char name[XT_TABLE_MAXNAMELEN];
struct xt_table *t;
int ret;
if (copy_from_user(name, user, sizeof(name)) != 0)
return -EFAULT;
- name[ARPT_TABLE_MAXNAMELEN-1] = '\0';
+ name[XT_TABLE_MAXNAMELEN-1] = '\0';
#ifdef CONFIG_COMPAT
if (compat)
xt_compat_lock(NFPROTO_ARP);
#ifdef CONFIG_COMPAT
static inline void compat_release_entry(struct compat_arpt_entry *e)
{
- struct arpt_entry_target *t;
+ struct xt_entry_target *t;
t = compat_arpt_get_target(e);
module_put(t->u.kernel.target->me);
const unsigned int *underflows,
const char *name)
{
- struct arpt_entry_target *t;
+ struct xt_entry_target *t;
struct xt_target *target;
unsigned int entry_offset;
int ret, off, h;
unsigned int *size, const char *name,
struct xt_table_info *newinfo, unsigned char *base)
{
- struct arpt_entry_target *t;
+ struct xt_entry_target *t;
struct xt_target *target;
struct arpt_entry *de;
unsigned int origsize;
}
struct compat_arpt_replace {
- char name[ARPT_TABLE_MAXNAMELEN];
+ char name[XT_TABLE_MAXNAMELEN];
u32 valid_hooks;
u32 num_entries;
u32 size;
struct xt_counters *counters,
unsigned int i)
{
- struct arpt_entry_target *t;
+ struct xt_entry_target *t;
struct compat_arpt_entry __user *ce;
u_int16_t target_offset, next_offset;
compat_uint_t origsize;
}
struct compat_arpt_get_entries {
- char name[ARPT_TABLE_MAXNAMELEN];
+ char name[XT_TABLE_MAXNAMELEN];
compat_uint_t size;
struct compat_arpt_entry entrytable[0];
};
/* The built-in targets: standard (NULL) and error. */
static struct xt_target arpt_builtin_tg[] __read_mostly = {
{
- .name = ARPT_STANDARD_TARGET,
+ .name = XT_STANDARD_TARGET,
.targetsize = sizeof(int),
.family = NFPROTO_ARP,
#ifdef CONFIG_COMPAT
#endif
},
{
- .name = ARPT_ERROR_TARGET,
+ .name = XT_ERROR_TARGET,
.target = arpt_error,
- .targetsize = ARPT_FUNCTION_MAXNAMELEN,
+ .targetsize = XT_FUNCTION_MAXNAMELEN,
.family = NFPROTO_ARP,
},
};
return false;
if (mangle->target != NF_DROP && mangle->target != NF_ACCEPT &&
- mangle->target != ARPT_CONTINUE)
+ mangle->target != XT_CONTINUE)
return false;
return true;
}
}
/* for const-correctness */
-static inline const struct ipt_entry_target *
+static inline const struct xt_entry_target *
ipt_get_target_c(const struct ipt_entry *e)
{
return ipt_get_target((struct ipt_entry *)e);
const char *hookname, const char **chainname,
const char **comment, unsigned int *rulenum)
{
- const struct ipt_standard_target *t = (void *)ipt_get_target_c(s);
+ const struct xt_standard_target *t = (void *)ipt_get_target_c(s);
- if (strcmp(t->target.u.kernel.target->name, IPT_ERROR_TARGET) == 0) {
+ if (strcmp(t->target.u.kernel.target->name, XT_ERROR_TARGET) == 0) {
/* Head of user chain: ERROR target with chainname */
*chainname = t->target.data;
(*rulenum) = 0;
if (s->target_offset == sizeof(struct ipt_entry) &&
strcmp(t->target.u.kernel.target->name,
- IPT_STANDARD_TARGET) == 0 &&
+ XT_STANDARD_TARGET) == 0 &&
t->verdict < 0 &&
unconditional(&s->ip)) {
/* Tail of chains: STANDARD target (return/policy) */
get_entry(table_base, private->underflow[hook]));
do {
- const struct ipt_entry_target *t;
+ const struct xt_entry_target *t;
const struct xt_entry_match *ematch;
IP_NF_ASSERT(e);
if (!t->u.kernel.target->target) {
int v;
- v = ((struct ipt_standard_target *)t)->verdict;
+ v = ((struct xt_standard_target *)t)->verdict;
if (v < 0) {
/* Pop from stack? */
- if (v != IPT_RETURN) {
+ if (v != XT_RETURN) {
verdict = (unsigned)(-v) - 1;
break;
}
verdict = t->u.kernel.target->target(skb, &acpar);
/* Target might have changed stuff. */
ip = ip_hdr(skb);
- if (verdict == IPT_CONTINUE)
+ if (verdict == XT_CONTINUE)
e = ipt_next_entry(e);
else
/* Verdict */
e->counters.pcnt = pos;
for (;;) {
- const struct ipt_standard_target *t
+ const struct xt_standard_target *t
= (void *)ipt_get_target_c(e);
int visited = e->comefrom & (1 << hook);
/* Unconditional return/END. */
if ((e->target_offset == sizeof(struct ipt_entry) &&
(strcmp(t->target.u.user.name,
- IPT_STANDARD_TARGET) == 0) &&
+ XT_STANDARD_TARGET) == 0) &&
t->verdict < 0 && unconditional(&e->ip)) ||
visited) {
unsigned int oldpos, size;
if ((strcmp(t->target.u.user.name,
- IPT_STANDARD_TARGET) == 0) &&
+ XT_STANDARD_TARGET) == 0) &&
t->verdict < -NF_MAX_VERDICT - 1) {
duprintf("mark_source_chains: bad "
"negative verdict (%i)\n",
int newpos = t->verdict;
if (strcmp(t->target.u.user.name,
- IPT_STANDARD_TARGET) == 0 &&
+ XT_STANDARD_TARGET) == 0 &&
newpos >= 0) {
if (newpos > newinfo->size -
sizeof(struct ipt_entry)) {
return 1;
}
-static void cleanup_match(struct ipt_entry_match *m, struct net *net)
+static void cleanup_match(struct xt_entry_match *m, struct net *net)
{
struct xt_mtdtor_param par;
static int
check_entry(const struct ipt_entry *e, const char *name)
{
- const struct ipt_entry_target *t;
+ const struct xt_entry_target *t;
if (!ip_checkentry(&e->ip)) {
duprintf("ip check failed %p %s.\n", e, par->match->name);
return -EINVAL;
}
- if (e->target_offset + sizeof(struct ipt_entry_target) >
+ if (e->target_offset + sizeof(struct xt_entry_target) >
e->next_offset)
return -EINVAL;
}
static int
-check_match(struct ipt_entry_match *m, struct xt_mtchk_param *par)
+check_match(struct xt_entry_match *m, struct xt_mtchk_param *par)
{
const struct ipt_ip *ip = par->entryinfo;
int ret;
}
static int
-find_check_match(struct ipt_entry_match *m, struct xt_mtchk_param *par)
+find_check_match(struct xt_entry_match *m, struct xt_mtchk_param *par)
{
struct xt_match *match;
int ret;
static int check_target(struct ipt_entry *e, struct net *net, const char *name)
{
- struct ipt_entry_target *t = ipt_get_target(e);
+ struct xt_entry_target *t = ipt_get_target(e);
struct xt_tgchk_param par = {
.net = net,
.table = name,
find_check_entry(struct ipt_entry *e, struct net *net, const char *name,
unsigned int size)
{
- struct ipt_entry_target *t;
+ struct xt_entry_target *t;
struct xt_target *target;
int ret;
unsigned int j;
static bool check_underflow(const struct ipt_entry *e)
{
- const struct ipt_entry_target *t;
+ const struct xt_entry_target *t;
unsigned int verdict;
if (!unconditional(&e->ip))
t = ipt_get_target_c(e);
if (strcmp(t->u.user.name, XT_STANDARD_TARGET) != 0)
return false;
- verdict = ((struct ipt_standard_target *)t)->verdict;
+ verdict = ((struct xt_standard_target *)t)->verdict;
verdict = -verdict - 1;
return verdict == NF_DROP || verdict == NF_ACCEPT;
}
}
if (e->next_offset
- < sizeof(struct ipt_entry) + sizeof(struct ipt_entry_target)) {
+ < sizeof(struct ipt_entry) + sizeof(struct xt_entry_target)) {
duprintf("checking: element %p size %u\n",
e, e->next_offset);
return -EINVAL;
cleanup_entry(struct ipt_entry *e, struct net *net)
{
struct xt_tgdtor_param par;
- struct ipt_entry_target *t;
+ struct xt_entry_target *t;
struct xt_entry_match *ematch;
/* Cleanup all matches */
/* ... then go back and fix counters and names */
for (off = 0, num = 0; off < total_size; off += e->next_offset, num++){
unsigned int i;
- const struct ipt_entry_match *m;
- const struct ipt_entry_target *t;
+ const struct xt_entry_match *m;
+ const struct xt_entry_target *t;
e = (struct ipt_entry *)(loc_cpu_entry + off);
if (copy_to_user(userptr + off
m = (void *)e + i;
if (copy_to_user(userptr + off + i
- + offsetof(struct ipt_entry_match,
+ + offsetof(struct xt_entry_match,
u.user.name),
m->u.kernel.match->name,
strlen(m->u.kernel.match->name)+1)
t = ipt_get_target_c(e);
if (copy_to_user(userptr + off + e->target_offset
- + offsetof(struct ipt_entry_target,
+ + offsetof(struct xt_entry_target,
u.user.name),
t->u.kernel.target->name,
strlen(t->u.kernel.target->name)+1) != 0) {
const void *base, struct xt_table_info *newinfo)
{
const struct xt_entry_match *ematch;
- const struct ipt_entry_target *t;
+ const struct xt_entry_target *t;
unsigned int entry_offset;
int off, i, ret;
static int get_info(struct net *net, void __user *user,
const int *len, int compat)
{
- char name[IPT_TABLE_MAXNAMELEN];
+ char name[XT_TABLE_MAXNAMELEN];
struct xt_table *t;
int ret;
if (copy_from_user(name, user, sizeof(name)) != 0)
return -EFAULT;
- name[IPT_TABLE_MAXNAMELEN-1] = '\0';
+ name[XT_TABLE_MAXNAMELEN-1] = '\0';
#ifdef CONFIG_COMPAT
if (compat)
xt_compat_lock(AF_INET);
#ifdef CONFIG_COMPAT
struct compat_ipt_replace {
- char name[IPT_TABLE_MAXNAMELEN];
+ char name[XT_TABLE_MAXNAMELEN];
u32 valid_hooks;
u32 num_entries;
u32 size;
u32 hook_entry[NF_INET_NUMHOOKS];
u32 underflow[NF_INET_NUMHOOKS];
u32 num_counters;
- compat_uptr_t counters; /* struct ipt_counters * */
+ compat_uptr_t counters; /* struct xt_counters * */
struct compat_ipt_entry entries[0];
};
unsigned int *size, struct xt_counters *counters,
unsigned int i)
{
- struct ipt_entry_target *t;
+ struct xt_entry_target *t;
struct compat_ipt_entry __user *ce;
u_int16_t target_offset, next_offset;
compat_uint_t origsize;
}
static int
-compat_find_calc_match(struct ipt_entry_match *m,
+compat_find_calc_match(struct xt_entry_match *m,
const char *name,
const struct ipt_ip *ip,
unsigned int hookmask,
static void compat_release_entry(struct compat_ipt_entry *e)
{
- struct ipt_entry_target *t;
+ struct xt_entry_target *t;
struct xt_entry_match *ematch;
/* Cleanup all matches */
const char *name)
{
struct xt_entry_match *ematch;
- struct ipt_entry_target *t;
+ struct xt_entry_target *t;
struct xt_target *target;
unsigned int entry_offset;
unsigned int j;
unsigned int *size, const char *name,
struct xt_table_info *newinfo, unsigned char *base)
{
- struct ipt_entry_target *t;
+ struct xt_entry_target *t;
struct xt_target *target;
struct ipt_entry *de;
unsigned int origsize;
}
struct compat_ipt_get_entries {
- char name[IPT_TABLE_MAXNAMELEN];
+ char name[XT_TABLE_MAXNAMELEN];
compat_uint_t size;
struct compat_ipt_entry entrytable[0];
};
case IPT_SO_GET_REVISION_MATCH:
case IPT_SO_GET_REVISION_TARGET: {
- struct ipt_get_revision rev;
+ struct xt_get_revision rev;
int target;
if (*len != sizeof(rev)) {
static struct xt_target ipt_builtin_tg[] __read_mostly = {
{
- .name = IPT_STANDARD_TARGET,
+ .name = XT_STANDARD_TARGET,
.targetsize = sizeof(int),
.family = NFPROTO_IPV4,
#ifdef CONFIG_COMPAT
#endif
},
{
- .name = IPT_ERROR_TARGET,
+ .name = XT_ERROR_TARGET,
.target = ipt_error,
- .targetsize = IPT_FUNCTION_MAXNAMELEN,
+ .targetsize = XT_FUNCTION_MAXNAMELEN,
.family = NFPROTO_IPV4,
},
};
#include <linux/netfilter/x_tables.h>
#include <linux/netfilter_ipv4/ipt_LOG.h>
#include <net/netfilter/nf_log.h>
+#include <net/netfilter/xt_log.h>
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Netfilter Core Team <coreteam@netfilter.org>");
MODULE_DESCRIPTION("Xtables: IPv4 packet logging to syslog");
-/* Use lock to serialize, so printks don't overlap */
-static DEFINE_SPINLOCK(log_lock);
-
/* One level of recursion won't kill us */
-static void dump_packet(const struct nf_loginfo *info,
+static void dump_packet(struct sbuff *m,
+ const struct nf_loginfo *info,
const struct sk_buff *skb,
unsigned int iphoff)
{
ih = skb_header_pointer(skb, iphoff, sizeof(_iph), &_iph);
if (ih == NULL) {
- printk("TRUNCATED");
+ sb_add(m, "TRUNCATED");
return;
}
/* Important fields:
* TOS, len, DF/MF, fragment offset, TTL, src, dst, options. */
/* Max length: 40 "SRC=255.255.255.255 DST=255.255.255.255 " */
- printk("SRC=%pI4 DST=%pI4 ",
+ sb_add(m, "SRC=%pI4 DST=%pI4 ",
&ih->saddr, &ih->daddr);
/* Max length: 46 "LEN=65535 TOS=0xFF PREC=0xFF TTL=255 ID=65535 " */
- printk("LEN=%u TOS=0x%02X PREC=0x%02X TTL=%u ID=%u ",
+ sb_add(m, "LEN=%u TOS=0x%02X PREC=0x%02X TTL=%u ID=%u ",
ntohs(ih->tot_len), ih->tos & IPTOS_TOS_MASK,
ih->tos & IPTOS_PREC_MASK, ih->ttl, ntohs(ih->id));
/* Max length: 6 "CE DF MF " */
if (ntohs(ih->frag_off) & IP_CE)
- printk("CE ");
+ sb_add(m, "CE ");
if (ntohs(ih->frag_off) & IP_DF)
- printk("DF ");
+ sb_add(m, "DF ");
if (ntohs(ih->frag_off) & IP_MF)
- printk("MF ");
+ sb_add(m, "MF ");
/* Max length: 11 "FRAG:65535 " */
if (ntohs(ih->frag_off) & IP_OFFSET)
- printk("FRAG:%u ", ntohs(ih->frag_off) & IP_OFFSET);
+ sb_add(m, "FRAG:%u ", ntohs(ih->frag_off) & IP_OFFSET);
if ((logflags & IPT_LOG_IPOPT) &&
ih->ihl * 4 > sizeof(struct iphdr)) {
op = skb_header_pointer(skb, iphoff+sizeof(_iph),
optsize, _opt);
if (op == NULL) {
- printk("TRUNCATED");
+ sb_add(m, "TRUNCATED");
return;
}
/* Max length: 127 "OPT (" 15*4*2chars ") " */
- printk("OPT (");
+ sb_add(m, "OPT (");
for (i = 0; i < optsize; i++)
- printk("%02X", op[i]);
- printk(") ");
+ sb_add(m, "%02X", op[i]);
+ sb_add(m, ") ");
}
switch (ih->protocol) {
const struct tcphdr *th;
/* Max length: 10 "PROTO=TCP " */
- printk("PROTO=TCP ");
+ sb_add(m, "PROTO=TCP ");
if (ntohs(ih->frag_off) & IP_OFFSET)
break;
th = skb_header_pointer(skb, iphoff + ih->ihl * 4,
sizeof(_tcph), &_tcph);
if (th == NULL) {
- printk("INCOMPLETE [%u bytes] ",
+ sb_add(m, "INCOMPLETE [%u bytes] ",
skb->len - iphoff - ih->ihl*4);
break;
}
/* Max length: 20 "SPT=65535 DPT=65535 " */
- printk("SPT=%u DPT=%u ",
+ sb_add(m, "SPT=%u DPT=%u ",
ntohs(th->source), ntohs(th->dest));
/* Max length: 30 "SEQ=4294967295 ACK=4294967295 " */
if (logflags & IPT_LOG_TCPSEQ)
- printk("SEQ=%u ACK=%u ",
+ sb_add(m, "SEQ=%u ACK=%u ",
ntohl(th->seq), ntohl(th->ack_seq));
/* Max length: 13 "WINDOW=65535 " */
- printk("WINDOW=%u ", ntohs(th->window));
+ sb_add(m, "WINDOW=%u ", ntohs(th->window));
/* Max length: 9 "RES=0x3F " */
- printk("RES=0x%02x ", (u8)(ntohl(tcp_flag_word(th) & TCP_RESERVED_BITS) >> 22));
+ sb_add(m, "RES=0x%02x ", (u8)(ntohl(tcp_flag_word(th) & TCP_RESERVED_BITS) >> 22));
/* Max length: 32 "CWR ECE URG ACK PSH RST SYN FIN " */
if (th->cwr)
- printk("CWR ");
+ sb_add(m, "CWR ");
if (th->ece)
- printk("ECE ");
+ sb_add(m, "ECE ");
if (th->urg)
- printk("URG ");
+ sb_add(m, "URG ");
if (th->ack)
- printk("ACK ");
+ sb_add(m, "ACK ");
if (th->psh)
- printk("PSH ");
+ sb_add(m, "PSH ");
if (th->rst)
- printk("RST ");
+ sb_add(m, "RST ");
if (th->syn)
- printk("SYN ");
+ sb_add(m, "SYN ");
if (th->fin)
- printk("FIN ");
+ sb_add(m, "FIN ");
/* Max length: 11 "URGP=65535 " */
- printk("URGP=%u ", ntohs(th->urg_ptr));
+ sb_add(m, "URGP=%u ", ntohs(th->urg_ptr));
if ((logflags & IPT_LOG_TCPOPT) &&
th->doff * 4 > sizeof(struct tcphdr)) {
iphoff+ih->ihl*4+sizeof(_tcph),
optsize, _opt);
if (op == NULL) {
- printk("TRUNCATED");
+ sb_add(m, "TRUNCATED");
return;
}
/* Max length: 127 "OPT (" 15*4*2chars ") " */
- printk("OPT (");
+ sb_add(m, "OPT (");
for (i = 0; i < optsize; i++)
- printk("%02X", op[i]);
- printk(") ");
+ sb_add(m, "%02X", op[i]);
+ sb_add(m, ") ");
}
break;
}
if (ih->protocol == IPPROTO_UDP)
/* Max length: 10 "PROTO=UDP " */
- printk("PROTO=UDP " );
+ sb_add(m, "PROTO=UDP " );
else /* Max length: 14 "PROTO=UDPLITE " */
- printk("PROTO=UDPLITE ");
+ sb_add(m, "PROTO=UDPLITE ");
if (ntohs(ih->frag_off) & IP_OFFSET)
break;
uh = skb_header_pointer(skb, iphoff+ih->ihl*4,
sizeof(_udph), &_udph);
if (uh == NULL) {
- printk("INCOMPLETE [%u bytes] ",
+ sb_add(m, "INCOMPLETE [%u bytes] ",
skb->len - iphoff - ih->ihl*4);
break;
}
/* Max length: 20 "SPT=65535 DPT=65535 " */
- printk("SPT=%u DPT=%u LEN=%u ",
+ sb_add(m, "SPT=%u DPT=%u LEN=%u ",
ntohs(uh->source), ntohs(uh->dest),
ntohs(uh->len));
break;
[ICMP_ADDRESSREPLY] = 12 };
/* Max length: 11 "PROTO=ICMP " */
- printk("PROTO=ICMP ");
+ sb_add(m, "PROTO=ICMP ");
if (ntohs(ih->frag_off) & IP_OFFSET)
break;
ich = skb_header_pointer(skb, iphoff + ih->ihl * 4,
sizeof(_icmph), &_icmph);
if (ich == NULL) {
- printk("INCOMPLETE [%u bytes] ",
+ sb_add(m, "INCOMPLETE [%u bytes] ",
skb->len - iphoff - ih->ihl*4);
break;
}
/* Max length: 18 "TYPE=255 CODE=255 " */
- printk("TYPE=%u CODE=%u ", ich->type, ich->code);
+ sb_add(m, "TYPE=%u CODE=%u ", ich->type, ich->code);
/* Max length: 25 "INCOMPLETE [65535 bytes] " */
if (ich->type <= NR_ICMP_TYPES &&
required_len[ich->type] &&
skb->len-iphoff-ih->ihl*4 < required_len[ich->type]) {
- printk("INCOMPLETE [%u bytes] ",
+ sb_add(m, "INCOMPLETE [%u bytes] ",
skb->len - iphoff - ih->ihl*4);
break;
}
case ICMP_ECHOREPLY:
case ICMP_ECHO:
/* Max length: 19 "ID=65535 SEQ=65535 " */
- printk("ID=%u SEQ=%u ",
+ sb_add(m, "ID=%u SEQ=%u ",
ntohs(ich->un.echo.id),
ntohs(ich->un.echo.sequence));
break;
case ICMP_PARAMETERPROB:
/* Max length: 14 "PARAMETER=255 " */
- printk("PARAMETER=%u ",
+ sb_add(m, "PARAMETER=%u ",
ntohl(ich->un.gateway) >> 24);
break;
case ICMP_REDIRECT:
/* Max length: 24 "GATEWAY=255.255.255.255 " */
- printk("GATEWAY=%pI4 ", &ich->un.gateway);
+ sb_add(m, "GATEWAY=%pI4 ", &ich->un.gateway);
/* Fall through */
case ICMP_DEST_UNREACH:
case ICMP_SOURCE_QUENCH:
case ICMP_TIME_EXCEEDED:
/* Max length: 3+maxlen */
if (!iphoff) { /* Only recurse once. */
- printk("[");
- dump_packet(info, skb,
+ sb_add(m, "[");
+ dump_packet(m, info, skb,
iphoff + ih->ihl*4+sizeof(_icmph));
- printk("] ");
+ sb_add(m, "] ");
}
/* Max length: 10 "MTU=65535 " */
if (ich->type == ICMP_DEST_UNREACH &&
ich->code == ICMP_FRAG_NEEDED)
- printk("MTU=%u ", ntohs(ich->un.frag.mtu));
+ sb_add(m, "MTU=%u ", ntohs(ich->un.frag.mtu));
}
break;
}
break;
/* Max length: 9 "PROTO=AH " */
- printk("PROTO=AH ");
+ sb_add(m, "PROTO=AH ");
/* Max length: 25 "INCOMPLETE [65535 bytes] " */
ah = skb_header_pointer(skb, iphoff+ih->ihl*4,
sizeof(_ahdr), &_ahdr);
if (ah == NULL) {
- printk("INCOMPLETE [%u bytes] ",
+ sb_add(m, "INCOMPLETE [%u bytes] ",
skb->len - iphoff - ih->ihl*4);
break;
}
/* Length: 15 "SPI=0xF1234567 " */
- printk("SPI=0x%x ", ntohl(ah->spi));
+ sb_add(m, "SPI=0x%x ", ntohl(ah->spi));
break;
}
case IPPROTO_ESP: {
const struct ip_esp_hdr *eh;
/* Max length: 10 "PROTO=ESP " */
- printk("PROTO=ESP ");
+ sb_add(m, "PROTO=ESP ");
if (ntohs(ih->frag_off) & IP_OFFSET)
break;
eh = skb_header_pointer(skb, iphoff+ih->ihl*4,
sizeof(_esph), &_esph);
if (eh == NULL) {
- printk("INCOMPLETE [%u bytes] ",
+ sb_add(m, "INCOMPLETE [%u bytes] ",
skb->len - iphoff - ih->ihl*4);
break;
}
/* Length: 15 "SPI=0xF1234567 " */
- printk("SPI=0x%x ", ntohl(eh->spi));
+ sb_add(m, "SPI=0x%x ", ntohl(eh->spi));
break;
}
/* Max length: 10 "PROTO 255 " */
default:
- printk("PROTO=%u ", ih->protocol);
+ sb_add(m, "PROTO=%u ", ih->protocol);
}
/* Max length: 15 "UID=4294967295 " */
if ((logflags & IPT_LOG_UID) && !iphoff && skb->sk) {
read_lock_bh(&skb->sk->sk_callback_lock);
if (skb->sk->sk_socket && skb->sk->sk_socket->file)
- printk("UID=%u GID=%u ",
+ sb_add(m, "UID=%u GID=%u ",
skb->sk->sk_socket->file->f_cred->fsuid,
skb->sk->sk_socket->file->f_cred->fsgid);
read_unlock_bh(&skb->sk->sk_callback_lock);
/* Max length: 16 "MARK=0xFFFFFFFF " */
if (!iphoff && skb->mark)
- printk("MARK=0x%x ", skb->mark);
+ sb_add(m, "MARK=0x%x ", skb->mark);
/* Proto Max log string length */
/* IP: 40+46+6+11+127 = 230 */
/* maxlen = 230+ 91 + 230 + 252 = 803 */
}
-static void dump_mac_header(const struct nf_loginfo *info,
+static void dump_mac_header(struct sbuff *m,
+ const struct nf_loginfo *info,
const struct sk_buff *skb)
{
struct net_device *dev = skb->dev;
switch (dev->type) {
case ARPHRD_ETHER:
- printk("MACSRC=%pM MACDST=%pM MACPROTO=%04x ",
+ sb_add(m, "MACSRC=%pM MACDST=%pM MACPROTO=%04x ",
eth_hdr(skb)->h_source, eth_hdr(skb)->h_dest,
ntohs(eth_hdr(skb)->h_proto));
return;
}
fallback:
- printk("MAC=");
+ sb_add(m, "MAC=");
if (dev->hard_header_len &&
skb->mac_header != skb->network_header) {
const unsigned char *p = skb_mac_header(skb);
unsigned int i;
- printk("%02x", *p++);
+ sb_add(m, "%02x", *p++);
for (i = 1; i < dev->hard_header_len; i++, p++)
- printk(":%02x", *p);
+ sb_add(m, ":%02x", *p);
}
- printk(" ");
+ sb_add(m, " ");
}
static struct nf_loginfo default_loginfo = {
const struct nf_loginfo *loginfo,
const char *prefix)
{
+ struct sbuff *m = sb_open();
+
if (!loginfo)
loginfo = &default_loginfo;
- spin_lock_bh(&log_lock);
- printk("<%d>%sIN=%s OUT=%s ", loginfo->u.log.level,
+ sb_add(m, "<%d>%sIN=%s OUT=%s ", loginfo->u.log.level,
prefix,
in ? in->name : "",
out ? out->name : "");
physindev = skb->nf_bridge->physindev;
if (physindev && in != physindev)
- printk("PHYSIN=%s ", physindev->name);
+ sb_add(m, "PHYSIN=%s ", physindev->name);
physoutdev = skb->nf_bridge->physoutdev;
if (physoutdev && out != physoutdev)
- printk("PHYSOUT=%s ", physoutdev->name);
+ sb_add(m, "PHYSOUT=%s ", physoutdev->name);
}
#endif
/* MAC logging for input path only. */
if (in && !out)
- dump_mac_header(loginfo, skb);
+ dump_mac_header(m, loginfo, skb);
+
+ dump_packet(m, loginfo, skb, 0);
- dump_packet(loginfo, skb, 0);
- printk("\n");
- spin_unlock_bh(&log_lock);
+ sb_close(m);
}
static unsigned int
/* Try to get same port: if not, try to change it. */
for (port = ntohs(exp->saved_proto.tcp.port); port != 0; port++) {
+ int ret;
+
exp->tuple.dst.u.tcp.port = htons(port);
- if (nf_ct_expect_related(exp) == 0)
+ ret = nf_ct_expect_related(exp);
+ if (ret == 0)
+ break;
+ else if (ret != -EBUSY) {
+ port = 0;
break;
+ }
}
if (port == 0)
return rcu_dereference(nf_nat_protos[protonum]);
}
-const struct nf_nat_protocol *
+static const struct nf_nat_protocol *
nf_nat_proto_find_get(u_int8_t protonum)
{
const struct nf_nat_protocol *p;
return p;
}
-EXPORT_SYMBOL_GPL(nf_nat_proto_find_get);
-void
+static void
nf_nat_proto_put(const struct nf_nat_protocol *p)
{
module_put(p->me);
}
-EXPORT_SYMBOL_GPL(nf_nat_proto_put);
/* We keep an extra hash for each conntrack, for fast searching. */
static inline unsigned int
proto = __nf_nat_proto_find(orig_tuple->dst.protonum);
/* Only bother mapping if it's not already in range and unique */
- if (!(range->flags & IP_NAT_RANGE_PROTO_RANDOM) &&
- (!(range->flags & IP_NAT_RANGE_PROTO_SPECIFIED) ||
- proto->in_range(tuple, maniptype, &range->min, &range->max)) &&
- !nf_nat_used_tuple(tuple, ct))
- goto out;
+ if (!(range->flags & IP_NAT_RANGE_PROTO_RANDOM)) {
+ if (range->flags & IP_NAT_RANGE_PROTO_SPECIFIED) {
+ if (proto->in_range(tuple, maniptype, &range->min,
+ &range->max) &&
+ (range->min.all == range->max.all ||
+ !nf_nat_used_tuple(tuple, ct)))
+ goto out;
+ } else if (!nf_nat_used_tuple(tuple, ct)) {
+ goto out;
+ }
+ }
/* Last change: get protocol to try to obtain unique tuple. */
proto->unique_tuple(tuple, range, maniptype, ct);
return 0;
}
+ if (manip == IP_NAT_MANIP_SRC)
+ statusbit = IPS_SRC_NAT;
+ else
+ statusbit = IPS_DST_NAT;
+
+ /* Invert if this is reply dir. */
+ if (dir == IP_CT_DIR_REPLY)
+ statusbit ^= IPS_NAT_MASK;
+
+ if (!(ct->status & statusbit))
+ return 1;
+
pr_debug("icmp_reply_translation: translating error %p manip %u "
"dir %s\n", skb, manip,
dir == IP_CT_DIR_ORIGINAL ? "ORIG" : "REPLY");
/* Change outer to look the reply to an incoming packet
* (proto 0 means don't invert per-proto part). */
- if (manip == IP_NAT_MANIP_SRC)
- statusbit = IPS_SRC_NAT;
- else
- statusbit = IPS_DST_NAT;
-
- /* Invert if this is reply dir. */
- if (dir == IP_CT_DIR_REPLY)
- statusbit ^= IPS_NAT_MASK;
-
- if (ct->status & statusbit) {
- nf_ct_invert_tuplepr(&target, &ct->tuplehash[!dir].tuple);
- if (!manip_pkt(0, skb, 0, &target, manip))
- return 0;
- }
+ nf_ct_invert_tuplepr(&target, &ct->tuplehash[!dir].tuple);
+ if (!manip_pkt(0, skb, 0, &target, manip))
+ return 0;
return 1;
}
/* Try to get same port: if not, try to change it. */
for (port = ntohs(exp->saved_proto.tcp.port); port != 0; port++) {
+ int ret;
+
exp->tuple.dst.u.tcp.port = htons(port);
- if (nf_ct_expect_related(exp) == 0)
+ ret = nf_ct_expect_related(exp);
+ if (ret == 0)
+ break;
+ else if (ret != -EBUSY) {
+ port = 0;
break;
+ }
}
if (port == 0)
/* Try to get a pair of ports. */
for (nated_port = ntohs(rtp_exp->tuple.dst.u.udp.port);
nated_port != 0; nated_port += 2) {
+ int ret;
+
rtp_exp->tuple.dst.u.udp.port = htons(nated_port);
- if (nf_ct_expect_related(rtp_exp) == 0) {
+ ret = nf_ct_expect_related(rtp_exp);
+ if (ret == 0) {
rtcp_exp->tuple.dst.u.udp.port =
htons(nated_port + 1);
- if (nf_ct_expect_related(rtcp_exp) == 0)
+ ret = nf_ct_expect_related(rtcp_exp);
+ if (ret == 0)
+ break;
+ else if (ret != -EBUSY) {
+ nf_ct_unexpect_related(rtp_exp);
+ nated_port = 0;
break;
- nf_ct_unexpect_related(rtp_exp);
+ }
+ } else if (ret != -EBUSY) {
+ nated_port = 0;
+ break;
}
}
/* Try to get same port: if not, try to change it. */
for (; nated_port != 0; nated_port++) {
+ int ret;
+
exp->tuple.dst.u.tcp.port = htons(nated_port);
- if (nf_ct_expect_related(exp) == 0)
+ ret = nf_ct_expect_related(exp);
+ if (ret == 0)
+ break;
+ else if (ret != -EBUSY) {
+ nated_port = 0;
break;
+ }
}
if (nated_port == 0) { /* No port available */
/* Try to get same port: if not, try to change it. */
for (; nated_port != 0; nated_port++) {
+ int ret;
+
exp->tuple.dst.u.tcp.port = htons(nated_port);
- if (nf_ct_expect_related(exp) == 0)
+ ret = nf_ct_expect_related(exp);
+ if (ret == 0)
break;
+ else if (ret != -EBUSY) {
+ nated_port = 0;
+ break;
+ }
}
if (nated_port == 0) { /* No port available */
/* Try to get same port: if not, try to change it. */
for (; nated_port != 0; nated_port++) {
+ int ret;
+
exp->tuple.dst.u.tcp.port = htons(nated_port);
- if (nf_ct_expect_related(exp) == 0)
+ ret = nf_ct_expect_related(exp);
+ if (ret == 0)
+ break;
+ else if (ret != -EBUSY) {
+ nated_port = 0;
break;
+ }
}
if (nated_port == 0) { /* No port available */
/* Try to get same port: if not, try to change it. */
for (nated_port = ntohs(port); nated_port != 0; nated_port++) {
+ int ret;
+
exp->tuple.dst.u.tcp.port = htons(nated_port);
- if (nf_ct_expect_related(exp) == 0)
+ ret = nf_ct_expect_related(exp);
+ if (ret == 0)
break;
+ else if (ret != -EBUSY) {
+ nated_port = 0;
+ break;
+ }
}
if (nated_port == 0) { /* No port available */
}
EXPORT_SYMBOL_GPL(nf_nat_set_seq_adjust);
+static void nf_nat_csum(struct sk_buff *skb, struct iphdr *iph, void *data,
+ int datalen, __sum16 *check, int oldlen)
+{
+ struct rtable *rt = skb_rtable(skb);
+
+ if (skb->ip_summed != CHECKSUM_PARTIAL) {
+ if (!(rt->rt_flags & RTCF_LOCAL) &&
+ skb->dev->features & NETIF_F_V4_CSUM) {
+ skb->ip_summed = CHECKSUM_PARTIAL;
+ skb->csum_start = skb_headroom(skb) +
+ skb_network_offset(skb) +
+ iph->ihl * 4;
+ skb->csum_offset = (void *)check - data;
+ *check = ~csum_tcpudp_magic(iph->saddr, iph->daddr,
+ datalen, iph->protocol, 0);
+ } else {
+ *check = 0;
+ *check = csum_tcpudp_magic(iph->saddr, iph->daddr,
+ datalen, iph->protocol,
+ csum_partial(data, datalen,
+ 0));
+ if (iph->protocol == IPPROTO_UDP && !*check)
+ *check = CSUM_MANGLED_0;
+ }
+ } else
+ inet_proto_csum_replace2(check, skb,
+ htons(oldlen), htons(datalen), 1);
+}
+
/* Generic function for mangling variable-length address changes inside
* NATed TCP connections (like the PORT XXX,XXX,XXX,XXX,XXX,XXX
* command in FTP).
const char *rep_buffer,
unsigned int rep_len, bool adjust)
{
- struct rtable *rt = skb_rtable(skb);
struct iphdr *iph;
struct tcphdr *tcph;
int oldlen, datalen;
match_offset, match_len, rep_buffer, rep_len);
datalen = skb->len - iph->ihl*4;
- if (skb->ip_summed != CHECKSUM_PARTIAL) {
- if (!(rt->rt_flags & RTCF_LOCAL) &&
- skb->dev->features & NETIF_F_V4_CSUM) {
- skb->ip_summed = CHECKSUM_PARTIAL;
- skb->csum_start = skb_headroom(skb) +
- skb_network_offset(skb) +
- iph->ihl * 4;
- skb->csum_offset = offsetof(struct tcphdr, check);
- tcph->check = ~tcp_v4_check(datalen,
- iph->saddr, iph->daddr, 0);
- } else {
- tcph->check = 0;
- tcph->check = tcp_v4_check(datalen,
- iph->saddr, iph->daddr,
- csum_partial(tcph,
- datalen, 0));
- }
- } else
- inet_proto_csum_replace2(&tcph->check, skb,
- htons(oldlen), htons(datalen), 1);
+ nf_nat_csum(skb, iph, tcph, datalen, &tcph->check, oldlen);
if (adjust && rep_len != match_len)
nf_nat_set_seq_adjust(ct, ctinfo, tcph->seq,
const char *rep_buffer,
unsigned int rep_len)
{
- struct rtable *rt = skb_rtable(skb);
struct iphdr *iph;
struct udphdr *udph;
int datalen, oldlen;
if (!udph->check && skb->ip_summed != CHECKSUM_PARTIAL)
return 1;
- if (skb->ip_summed != CHECKSUM_PARTIAL) {
- if (!(rt->rt_flags & RTCF_LOCAL) &&
- skb->dev->features & NETIF_F_V4_CSUM) {
- skb->ip_summed = CHECKSUM_PARTIAL;
- skb->csum_start = skb_headroom(skb) +
- skb_network_offset(skb) +
- iph->ihl * 4;
- skb->csum_offset = offsetof(struct udphdr, check);
- udph->check = ~csum_tcpudp_magic(iph->saddr, iph->daddr,
- datalen, IPPROTO_UDP,
- 0);
- } else {
- udph->check = 0;
- udph->check = csum_tcpudp_magic(iph->saddr, iph->daddr,
- datalen, IPPROTO_UDP,
- csum_partial(udph,
- datalen, 0));
- if (!udph->check)
- udph->check = CSUM_MANGLED_0;
- }
- } else
- inet_proto_csum_replace2(&udph->check, skb,
- htons(oldlen), htons(datalen), 1);
+ nf_nat_csum(skb, iph, udph, datalen, &udph->check, oldlen);
return 1;
}
/* Try to get same port: if not, try to change it. */
for (port = ntohs(exp->saved_proto.tcp.port); port != 0; port++) {
+ int ret;
+
exp->tuple.dst.u.tcp.port = htons(port);
- if (nf_ct_expect_related(exp) == 0)
+ ret = nf_ct_expect_related(exp);
+ if (ret == 0)
+ break;
+ else if (ret != -EBUSY) {
+ port = 0;
break;
+ }
}
if (port == 0)
{
/* Force range to this IP; let proto decide mapping for
per-proto parts (hence not IP_NAT_RANGE_PROTO_SPECIFIED).
- Use reply in case it's already been mangled (eg local packet).
*/
- __be32 ip
- = (HOOK2MANIP(hooknum) == IP_NAT_MANIP_SRC
- ? ct->tuplehash[IP_CT_DIR_REPLY].tuple.dst.u3.ip
- : ct->tuplehash[IP_CT_DIR_REPLY].tuple.src.u3.ip);
- struct nf_nat_range range
- = { IP_NAT_RANGE_MAP_IPS, ip, ip, { 0 }, { 0 } };
-
- pr_debug("Allocating NULL binding for %p (%pI4)\n", ct, &ip);
+ struct nf_nat_range range;
+
+ range.flags = 0;
+ pr_debug("Allocating NULL binding for %p (%pI4)\n", ct,
+ HOOK2MANIP(hooknum) == IP_NAT_MANIP_SRC ?
+ &ct->tuplehash[IP_CT_DIR_REPLY].tuple.dst.u3.ip :
+ &ct->tuplehash[IP_CT_DIR_REPLY].tuple.src.u3.ip);
+
return nf_nat_setup_info(ct, &range, HOOK2MANIP(hooknum));
}
exp->expectfn = ip_nat_sip_expected;
for (; port != 0; port++) {
+ int ret;
+
exp->tuple.dst.u.udp.port = htons(port);
- if (nf_ct_expect_related(exp) == 0)
+ ret = nf_ct_expect_related(exp);
+ if (ret == 0)
+ break;
+ else if (ret != -EBUSY) {
+ port = 0;
break;
+ }
}
if (port == 0)
/* Try to get same pair of ports: if not, try to change them. */
for (port = ntohs(rtp_exp->tuple.dst.u.udp.port);
port != 0; port += 2) {
+ int ret;
+
rtp_exp->tuple.dst.u.udp.port = htons(port);
- if (nf_ct_expect_related(rtp_exp) != 0)
+ ret = nf_ct_expect_related(rtp_exp);
+ if (ret == -EBUSY)
continue;
+ else if (ret < 0) {
+ port = 0;
+ break;
+ }
rtcp_exp->tuple.dst.u.udp.port = htons(port + 1);
- if (nf_ct_expect_related(rtcp_exp) == 0)
+ ret = nf_ct_expect_related(rtcp_exp);
+ if (ret == 0)
break;
- nf_ct_unexpect_related(rtp_exp);
+ else if (ret != -EBUSY) {
+ nf_ct_unexpect_related(rtp_exp);
+ port = 0;
+ break;
+ }
}
if (port == 0)
newsk = tcp_create_openreq_child(sk, req, skb);
if (!newsk)
- goto exit;
+ goto exit_nonewsk;
newsk->sk_gso_type = SKB_GSO_TCPV4;
sk_setup_caps(newsk, dst);
}
#endif
+ if (__inet_inherit_port(sk, newsk) < 0) {
+ sock_put(newsk);
+ goto exit;
+ }
__inet_hash_nolisten(newsk, NULL);
- __inet_inherit_port(sk, newsk);
return newsk;
exit_overflow:
NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_LISTENOVERFLOWS);
+exit_nonewsk:
+ dst_release(dst);
exit:
NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_LISTENDROPS);
- dst_release(dst);
return NULL;
}
EXPORT_SYMBOL(tcp_v4_syn_recv_sock);
*/
v4addr = LOOPBACK4_IPV6;
if (!(addr_type & IPV6_ADDR_MULTICAST)) {
- if (!ipv6_chk_addr(net, &addr->sin6_addr,
+ if (!inet->transparent &&
+ !ipv6_chk_addr(net, &addr->sin6_addr,
dev, 0)) {
err = -EADDRNOTAVAIL;
goto out_unlock;
u8 *ptr = nh + opt->dst1;
put_cmsg(msg, SOL_IPV6, IPV6_2292DSTOPTS, (ptr[1]+1)<<3, ptr);
}
+ if (np->rxopt.bits.rxorigdstaddr) {
+ struct sockaddr_in6 sin6;
+ u16 *ports = (u16 *) skb_transport_header(skb);
+
+ if (skb_transport_offset(skb) + 4 <= skb->len) {
+ /* All current transport protocols have the port numbers in the
+ * first four bytes of the transport header and this function is
+ * written with this assumption in mind.
+ */
+
+ sin6.sin6_family = AF_INET6;
+ ipv6_addr_copy(&sin6.sin6_addr, &ipv6_hdr(skb)->daddr);
+ sin6.sin6_port = ports[1];
+ sin6.sin6_flowinfo = 0;
+ sin6.sin6_scope_id = 0;
+
+ put_cmsg(msg, SOL_IPV6, IPV6_ORIGDSTADDR, sizeof(sin6), &sin6);
+ }
+ }
return 0;
}
retv = 0;
break;
+ case IPV6_TRANSPARENT:
+ if (optlen < sizeof(int))
+ goto e_inval;
+ /* we don't have a separate transparent bit for IPV6 we use the one in the IPv4 socket */
+ inet_sk(sk)->transparent = valbool;
+ retv = 0;
+ break;
+
+ case IPV6_RECVORIGDSTADDR:
+ if (optlen < sizeof(int))
+ goto e_inval;
+ np->rxopt.bits.rxorigdstaddr = valbool;
+ retv = 0;
+ break;
+
case IPV6_HOPOPTS:
case IPV6_RTHDRDSTOPTS:
case IPV6_RTHDR:
break;
}
+ case IPV6_TRANSPARENT:
+ val = inet_sk(sk)->transparent;
+ break;
+
+ case IPV6_RECVORIGDSTADDR:
+ val = np->rxopt.bits.rxorigdstaddr;
+ break;
+
case IPV6_UNICAST_HOPS:
case IPV6_MULTICAST_HOPS:
{
# The targets
config IP6_NF_TARGET_HL
tristate '"HL" hoplimit target support'
- depends on NETFILTER_ADVANCED
+ depends on NETFILTER_ADVANCED && IP6_NF_MANGLE
select NETFILTER_XT_TARGET_HL
---help---
- This is a backwards-compat option for the user's convenience
+ This is a backwards-compatible option for the user's convenience
(e.g. when running oldconfig). It selects
CONFIG_NETFILTER_XT_TARGET_HL.
obj-$(CONFIG_IP6_NF_SECURITY) += ip6table_security.o
# objects for l3 independent conntrack
-nf_conntrack_ipv6-objs := nf_conntrack_l3proto_ipv6.o nf_conntrack_proto_icmpv6.o nf_conntrack_reasm.o
+nf_conntrack_ipv6-objs := nf_conntrack_l3proto_ipv6.o nf_conntrack_proto_icmpv6.o
+nf_defrag_ipv6-objs := nf_defrag_ipv6_hooks.o nf_conntrack_reasm.o
# l3 independent conntrack
-obj-$(CONFIG_NF_CONNTRACK_IPV6) += nf_conntrack_ipv6.o
+obj-$(CONFIG_NF_CONNTRACK_IPV6) += nf_conntrack_ipv6.o nf_defrag_ipv6.o
# matches
obj-$(CONFIG_IP6_NF_MATCH_AH) += ip6t_ah.o
return memcmp(ipv6, &uncond, sizeof(uncond)) == 0;
}
-static inline const struct ip6t_entry_target *
+static inline const struct xt_entry_target *
ip6t_get_target_c(const struct ip6t_entry *e)
{
return ip6t_get_target((struct ip6t_entry *)e);
const char *hookname, const char **chainname,
const char **comment, unsigned int *rulenum)
{
- const struct ip6t_standard_target *t = (void *)ip6t_get_target_c(s);
+ const struct xt_standard_target *t = (void *)ip6t_get_target_c(s);
- if (strcmp(t->target.u.kernel.target->name, IP6T_ERROR_TARGET) == 0) {
+ if (strcmp(t->target.u.kernel.target->name, XT_ERROR_TARGET) == 0) {
/* Head of user chain: ERROR target with chainname */
*chainname = t->target.data;
(*rulenum) = 0;
if (s->target_offset == sizeof(struct ip6t_entry) &&
strcmp(t->target.u.kernel.target->name,
- IP6T_STANDARD_TARGET) == 0 &&
+ XT_STANDARD_TARGET) == 0 &&
t->verdict < 0 &&
unconditional(&s->ipv6)) {
/* Tail of chains: STANDARD target (return/policy) */
e = get_entry(table_base, private->hook_entry[hook]);
do {
- const struct ip6t_entry_target *t;
+ const struct xt_entry_target *t;
const struct xt_entry_match *ematch;
IP_NF_ASSERT(e);
if (!t->u.kernel.target->target) {
int v;
- v = ((struct ip6t_standard_target *)t)->verdict;
+ v = ((struct xt_standard_target *)t)->verdict;
if (v < 0) {
/* Pop from stack? */
- if (v != IP6T_RETURN) {
+ if (v != XT_RETURN) {
verdict = (unsigned)(-v) - 1;
break;
}
acpar.targinfo = t->data;
verdict = t->u.kernel.target->target(skb, &acpar);
- if (verdict == IP6T_CONTINUE)
+ if (verdict == XT_CONTINUE)
e = ip6t_next_entry(e);
else
/* Verdict */
e->counters.pcnt = pos;
for (;;) {
- const struct ip6t_standard_target *t
+ const struct xt_standard_target *t
= (void *)ip6t_get_target_c(e);
int visited = e->comefrom & (1 << hook);
/* Unconditional return/END. */
if ((e->target_offset == sizeof(struct ip6t_entry) &&
(strcmp(t->target.u.user.name,
- IP6T_STANDARD_TARGET) == 0) &&
+ XT_STANDARD_TARGET) == 0) &&
t->verdict < 0 &&
unconditional(&e->ipv6)) || visited) {
unsigned int oldpos, size;
if ((strcmp(t->target.u.user.name,
- IP6T_STANDARD_TARGET) == 0) &&
+ XT_STANDARD_TARGET) == 0) &&
t->verdict < -NF_MAX_VERDICT - 1) {
duprintf("mark_source_chains: bad "
"negative verdict (%i)\n",
int newpos = t->verdict;
if (strcmp(t->target.u.user.name,
- IP6T_STANDARD_TARGET) == 0 &&
+ XT_STANDARD_TARGET) == 0 &&
newpos >= 0) {
if (newpos > newinfo->size -
sizeof(struct ip6t_entry)) {
return 1;
}
-static void cleanup_match(struct ip6t_entry_match *m, struct net *net)
+static void cleanup_match(struct xt_entry_match *m, struct net *net)
{
struct xt_mtdtor_param par;
static int
check_entry(const struct ip6t_entry *e, const char *name)
{
- const struct ip6t_entry_target *t;
+ const struct xt_entry_target *t;
if (!ip6_checkentry(&e->ipv6)) {
duprintf("ip_tables: ip check failed %p %s.\n", e, name);
return -EINVAL;
}
- if (e->target_offset + sizeof(struct ip6t_entry_target) >
+ if (e->target_offset + sizeof(struct xt_entry_target) >
e->next_offset)
return -EINVAL;
return 0;
}
-static int check_match(struct ip6t_entry_match *m, struct xt_mtchk_param *par)
+static int check_match(struct xt_entry_match *m, struct xt_mtchk_param *par)
{
const struct ip6t_ip6 *ipv6 = par->entryinfo;
int ret;
}
static int
-find_check_match(struct ip6t_entry_match *m, struct xt_mtchk_param *par)
+find_check_match(struct xt_entry_match *m, struct xt_mtchk_param *par)
{
struct xt_match *match;
int ret;
static int check_target(struct ip6t_entry *e, struct net *net, const char *name)
{
- struct ip6t_entry_target *t = ip6t_get_target(e);
+ struct xt_entry_target *t = ip6t_get_target(e);
struct xt_tgchk_param par = {
.net = net,
.table = name,
find_check_entry(struct ip6t_entry *e, struct net *net, const char *name,
unsigned int size)
{
- struct ip6t_entry_target *t;
+ struct xt_entry_target *t;
struct xt_target *target;
int ret;
unsigned int j;
static bool check_underflow(const struct ip6t_entry *e)
{
- const struct ip6t_entry_target *t;
+ const struct xt_entry_target *t;
unsigned int verdict;
if (!unconditional(&e->ipv6))
t = ip6t_get_target_c(e);
if (strcmp(t->u.user.name, XT_STANDARD_TARGET) != 0)
return false;
- verdict = ((struct ip6t_standard_target *)t)->verdict;
+ verdict = ((struct xt_standard_target *)t)->verdict;
verdict = -verdict - 1;
return verdict == NF_DROP || verdict == NF_ACCEPT;
}
}
if (e->next_offset
- < sizeof(struct ip6t_entry) + sizeof(struct ip6t_entry_target)) {
+ < sizeof(struct ip6t_entry) + sizeof(struct xt_entry_target)) {
duprintf("checking: element %p size %u\n",
e, e->next_offset);
return -EINVAL;
static void cleanup_entry(struct ip6t_entry *e, struct net *net)
{
struct xt_tgdtor_param par;
- struct ip6t_entry_target *t;
+ struct xt_entry_target *t;
struct xt_entry_match *ematch;
/* Cleanup all matches */
/* ... then go back and fix counters and names */
for (off = 0, num = 0; off < total_size; off += e->next_offset, num++){
unsigned int i;
- const struct ip6t_entry_match *m;
- const struct ip6t_entry_target *t;
+ const struct xt_entry_match *m;
+ const struct xt_entry_target *t;
e = (struct ip6t_entry *)(loc_cpu_entry + off);
if (copy_to_user(userptr + off
m = (void *)e + i;
if (copy_to_user(userptr + off + i
- + offsetof(struct ip6t_entry_match,
+ + offsetof(struct xt_entry_match,
u.user.name),
m->u.kernel.match->name,
strlen(m->u.kernel.match->name)+1)
t = ip6t_get_target_c(e);
if (copy_to_user(userptr + off + e->target_offset
- + offsetof(struct ip6t_entry_target,
+ + offsetof(struct xt_entry_target,
u.user.name),
t->u.kernel.target->name,
strlen(t->u.kernel.target->name)+1) != 0) {
const void *base, struct xt_table_info *newinfo)
{
const struct xt_entry_match *ematch;
- const struct ip6t_entry_target *t;
+ const struct xt_entry_target *t;
unsigned int entry_offset;
int off, i, ret;
static int get_info(struct net *net, void __user *user,
const int *len, int compat)
{
- char name[IP6T_TABLE_MAXNAMELEN];
+ char name[XT_TABLE_MAXNAMELEN];
struct xt_table *t;
int ret;
if (copy_from_user(name, user, sizeof(name)) != 0)
return -EFAULT;
- name[IP6T_TABLE_MAXNAMELEN-1] = '\0';
+ name[XT_TABLE_MAXNAMELEN-1] = '\0';
#ifdef CONFIG_COMPAT
if (compat)
xt_compat_lock(AF_INET6);
#ifdef CONFIG_COMPAT
struct compat_ip6t_replace {
- char name[IP6T_TABLE_MAXNAMELEN];
+ char name[XT_TABLE_MAXNAMELEN];
u32 valid_hooks;
u32 num_entries;
u32 size;
u32 hook_entry[NF_INET_NUMHOOKS];
u32 underflow[NF_INET_NUMHOOKS];
u32 num_counters;
- compat_uptr_t counters; /* struct ip6t_counters * */
+ compat_uptr_t counters; /* struct xt_counters * */
struct compat_ip6t_entry entries[0];
};
unsigned int *size, struct xt_counters *counters,
unsigned int i)
{
- struct ip6t_entry_target *t;
+ struct xt_entry_target *t;
struct compat_ip6t_entry __user *ce;
u_int16_t target_offset, next_offset;
compat_uint_t origsize;
}
static int
-compat_find_calc_match(struct ip6t_entry_match *m,
+compat_find_calc_match(struct xt_entry_match *m,
const char *name,
const struct ip6t_ip6 *ipv6,
unsigned int hookmask,
static void compat_release_entry(struct compat_ip6t_entry *e)
{
- struct ip6t_entry_target *t;
+ struct xt_entry_target *t;
struct xt_entry_match *ematch;
/* Cleanup all matches */
const char *name)
{
struct xt_entry_match *ematch;
- struct ip6t_entry_target *t;
+ struct xt_entry_target *t;
struct xt_target *target;
unsigned int entry_offset;
unsigned int j;
unsigned int *size, const char *name,
struct xt_table_info *newinfo, unsigned char *base)
{
- struct ip6t_entry_target *t;
+ struct xt_entry_target *t;
struct xt_target *target;
struct ip6t_entry *de;
unsigned int origsize;
}
struct compat_ip6t_get_entries {
- char name[IP6T_TABLE_MAXNAMELEN];
+ char name[XT_TABLE_MAXNAMELEN];
compat_uint_t size;
struct compat_ip6t_entry entrytable[0];
};
case IP6T_SO_GET_REVISION_MATCH:
case IP6T_SO_GET_REVISION_TARGET: {
- struct ip6t_get_revision rev;
+ struct xt_get_revision rev;
int target;
if (*len != sizeof(rev)) {
/* The built-in targets: standard (NULL) and error. */
static struct xt_target ip6t_builtin_tg[] __read_mostly = {
{
- .name = IP6T_STANDARD_TARGET,
+ .name = XT_STANDARD_TARGET,
.targetsize = sizeof(int),
.family = NFPROTO_IPV6,
#ifdef CONFIG_COMPAT
#endif
},
{
- .name = IP6T_ERROR_TARGET,
+ .name = XT_ERROR_TARGET,
.target = ip6t_error,
- .targetsize = IP6T_FUNCTION_MAXNAMELEN,
+ .targetsize = XT_FUNCTION_MAXNAMELEN,
.family = NFPROTO_IPV6,
},
};
#include <linux/netfilter/x_tables.h>
#include <linux/netfilter_ipv6/ip6_tables.h>
#include <net/netfilter/nf_log.h>
+#include <net/netfilter/xt_log.h>
MODULE_AUTHOR("Jan Rekorajski <baggins@pld.org.pl>");
MODULE_DESCRIPTION("Xtables: IPv6 packet logging to syslog");
#include <net/route.h>
#include <linux/netfilter_ipv6/ip6t_LOG.h>
-/* Use lock to serialize, so printks don't overlap */
-static DEFINE_SPINLOCK(log_lock);
-
/* One level of recursion won't kill us */
-static void dump_packet(const struct nf_loginfo *info,
+static void dump_packet(struct sbuff *m,
+ const struct nf_loginfo *info,
const struct sk_buff *skb, unsigned int ip6hoff,
int recurse)
{
ih = skb_header_pointer(skb, ip6hoff, sizeof(_ip6h), &_ip6h);
if (ih == NULL) {
- printk("TRUNCATED");
+ sb_add(m, "TRUNCATED");
return;
}
/* Max length: 88 "SRC=0000.0000.0000.0000.0000.0000.0000.0000 DST=0000.0000.0000.0000.0000.0000.0000.0000 " */
- printk("SRC=%pI6 DST=%pI6 ", &ih->saddr, &ih->daddr);
+ sb_add(m, "SRC=%pI6 DST=%pI6 ", &ih->saddr, &ih->daddr);
/* Max length: 44 "LEN=65535 TC=255 HOPLIMIT=255 FLOWLBL=FFFFF " */
- printk("LEN=%Zu TC=%u HOPLIMIT=%u FLOWLBL=%u ",
+ sb_add(m, "LEN=%Zu TC=%u HOPLIMIT=%u FLOWLBL=%u ",
ntohs(ih->payload_len) + sizeof(struct ipv6hdr),
(ntohl(*(__be32 *)ih) & 0x0ff00000) >> 20,
ih->hop_limit,
hp = skb_header_pointer(skb, ptr, sizeof(_hdr), &_hdr);
if (hp == NULL) {
- printk("TRUNCATED");
+ sb_add(m, "TRUNCATED");
return;
}
/* Max length: 48 "OPT (...) " */
if (logflags & IP6T_LOG_IPOPT)
- printk("OPT ( ");
+ sb_add(m, "OPT ( ");
switch (currenthdr) {
case IPPROTO_FRAGMENT: {
struct frag_hdr _fhdr;
const struct frag_hdr *fh;
- printk("FRAG:");
+ sb_add(m, "FRAG:");
fh = skb_header_pointer(skb, ptr, sizeof(_fhdr),
&_fhdr);
if (fh == NULL) {
- printk("TRUNCATED ");
+ sb_add(m, "TRUNCATED ");
return;
}
/* Max length: 6 "65535 " */
- printk("%u ", ntohs(fh->frag_off) & 0xFFF8);
+ sb_add(m, "%u ", ntohs(fh->frag_off) & 0xFFF8);
/* Max length: 11 "INCOMPLETE " */
if (fh->frag_off & htons(0x0001))
- printk("INCOMPLETE ");
+ sb_add(m, "INCOMPLETE ");
- printk("ID:%08x ", ntohl(fh->identification));
+ sb_add(m, "ID:%08x ", ntohl(fh->identification));
if (ntohs(fh->frag_off) & 0xFFF8)
fragment = 1;
case IPPROTO_HOPOPTS:
if (fragment) {
if (logflags & IP6T_LOG_IPOPT)
- printk(")");
+ sb_add(m, ")");
return;
}
hdrlen = ipv6_optlen(hp);
const struct ip_auth_hdr *ah;
/* Max length: 3 "AH " */
- printk("AH ");
+ sb_add(m, "AH ");
if (fragment) {
- printk(")");
+ sb_add(m, ")");
return;
}
* Max length: 26 "INCOMPLETE [65535
* bytes] )"
*/
- printk("INCOMPLETE [%u bytes] )",
+ sb_add(m, "INCOMPLETE [%u bytes] )",
skb->len - ptr);
return;
}
/* Length: 15 "SPI=0xF1234567 */
- printk("SPI=0x%x ", ntohl(ah->spi));
+ sb_add(m, "SPI=0x%x ", ntohl(ah->spi));
}
const struct ip_esp_hdr *eh;
/* Max length: 4 "ESP " */
- printk("ESP ");
+ sb_add(m, "ESP ");
if (fragment) {
- printk(")");
+ sb_add(m, ")");
return;
}
eh = skb_header_pointer(skb, ptr, sizeof(_esph),
&_esph);
if (eh == NULL) {
- printk("INCOMPLETE [%u bytes] )",
+ sb_add(m, "INCOMPLETE [%u bytes] )",
skb->len - ptr);
return;
}
/* Length: 16 "SPI=0xF1234567 )" */
- printk("SPI=0x%x )", ntohl(eh->spi) );
+ sb_add(m, "SPI=0x%x )", ntohl(eh->spi) );
}
return;
default:
/* Max length: 20 "Unknown Ext Hdr 255" */
- printk("Unknown Ext Hdr %u", currenthdr);
+ sb_add(m, "Unknown Ext Hdr %u", currenthdr);
return;
}
if (logflags & IP6T_LOG_IPOPT)
- printk(") ");
+ sb_add(m, ") ");
currenthdr = hp->nexthdr;
ptr += hdrlen;
const struct tcphdr *th;
/* Max length: 10 "PROTO=TCP " */
- printk("PROTO=TCP ");
+ sb_add(m, "PROTO=TCP ");
if (fragment)
break;
/* Max length: 25 "INCOMPLETE [65535 bytes] " */
th = skb_header_pointer(skb, ptr, sizeof(_tcph), &_tcph);
if (th == NULL) {
- printk("INCOMPLETE [%u bytes] ", skb->len - ptr);
+ sb_add(m, "INCOMPLETE [%u bytes] ", skb->len - ptr);
return;
}
/* Max length: 20 "SPT=65535 DPT=65535 " */
- printk("SPT=%u DPT=%u ",
+ sb_add(m, "SPT=%u DPT=%u ",
ntohs(th->source), ntohs(th->dest));
/* Max length: 30 "SEQ=4294967295 ACK=4294967295 " */
if (logflags & IP6T_LOG_TCPSEQ)
- printk("SEQ=%u ACK=%u ",
+ sb_add(m, "SEQ=%u ACK=%u ",
ntohl(th->seq), ntohl(th->ack_seq));
/* Max length: 13 "WINDOW=65535 " */
- printk("WINDOW=%u ", ntohs(th->window));
+ sb_add(m, "WINDOW=%u ", ntohs(th->window));
/* Max length: 9 "RES=0x3C " */
- printk("RES=0x%02x ", (u_int8_t)(ntohl(tcp_flag_word(th) & TCP_RESERVED_BITS) >> 22));
+ sb_add(m, "RES=0x%02x ", (u_int8_t)(ntohl(tcp_flag_word(th) & TCP_RESERVED_BITS) >> 22));
/* Max length: 32 "CWR ECE URG ACK PSH RST SYN FIN " */
if (th->cwr)
- printk("CWR ");
+ sb_add(m, "CWR ");
if (th->ece)
- printk("ECE ");
+ sb_add(m, "ECE ");
if (th->urg)
- printk("URG ");
+ sb_add(m, "URG ");
if (th->ack)
- printk("ACK ");
+ sb_add(m, "ACK ");
if (th->psh)
- printk("PSH ");
+ sb_add(m, "PSH ");
if (th->rst)
- printk("RST ");
+ sb_add(m, "RST ");
if (th->syn)
- printk("SYN ");
+ sb_add(m, "SYN ");
if (th->fin)
- printk("FIN ");
+ sb_add(m, "FIN ");
/* Max length: 11 "URGP=65535 " */
- printk("URGP=%u ", ntohs(th->urg_ptr));
+ sb_add(m, "URGP=%u ", ntohs(th->urg_ptr));
if ((logflags & IP6T_LOG_TCPOPT) &&
th->doff * 4 > sizeof(struct tcphdr)) {
ptr + sizeof(struct tcphdr),
optsize, _opt);
if (op == NULL) {
- printk("OPT (TRUNCATED)");
+ sb_add(m, "OPT (TRUNCATED)");
return;
}
/* Max length: 127 "OPT (" 15*4*2chars ") " */
- printk("OPT (");
+ sb_add(m, "OPT (");
for (i =0; i < optsize; i++)
- printk("%02X", op[i]);
- printk(") ");
+ sb_add(m, "%02X", op[i]);
+ sb_add(m, ") ");
}
break;
}
if (currenthdr == IPPROTO_UDP)
/* Max length: 10 "PROTO=UDP " */
- printk("PROTO=UDP " );
+ sb_add(m, "PROTO=UDP " );
else /* Max length: 14 "PROTO=UDPLITE " */
- printk("PROTO=UDPLITE ");
+ sb_add(m, "PROTO=UDPLITE ");
if (fragment)
break;
/* Max length: 25 "INCOMPLETE [65535 bytes] " */
uh = skb_header_pointer(skb, ptr, sizeof(_udph), &_udph);
if (uh == NULL) {
- printk("INCOMPLETE [%u bytes] ", skb->len - ptr);
+ sb_add(m, "INCOMPLETE [%u bytes] ", skb->len - ptr);
return;
}
/* Max length: 20 "SPT=65535 DPT=65535 " */
- printk("SPT=%u DPT=%u LEN=%u ",
+ sb_add(m, "SPT=%u DPT=%u LEN=%u ",
ntohs(uh->source), ntohs(uh->dest),
ntohs(uh->len));
break;
const struct icmp6hdr *ic;
/* Max length: 13 "PROTO=ICMPv6 " */
- printk("PROTO=ICMPv6 ");
+ sb_add(m, "PROTO=ICMPv6 ");
if (fragment)
break;
/* Max length: 25 "INCOMPLETE [65535 bytes] " */
ic = skb_header_pointer(skb, ptr, sizeof(_icmp6h), &_icmp6h);
if (ic == NULL) {
- printk("INCOMPLETE [%u bytes] ", skb->len - ptr);
+ sb_add(m, "INCOMPLETE [%u bytes] ", skb->len - ptr);
return;
}
/* Max length: 18 "TYPE=255 CODE=255 " */
- printk("TYPE=%u CODE=%u ", ic->icmp6_type, ic->icmp6_code);
+ sb_add(m, "TYPE=%u CODE=%u ", ic->icmp6_type, ic->icmp6_code);
switch (ic->icmp6_type) {
case ICMPV6_ECHO_REQUEST:
case ICMPV6_ECHO_REPLY:
/* Max length: 19 "ID=65535 SEQ=65535 " */
- printk("ID=%u SEQ=%u ",
+ sb_add(m, "ID=%u SEQ=%u ",
ntohs(ic->icmp6_identifier),
ntohs(ic->icmp6_sequence));
break;
case ICMPV6_PARAMPROB:
/* Max length: 17 "POINTER=ffffffff " */
- printk("POINTER=%08x ", ntohl(ic->icmp6_pointer));
+ sb_add(m, "POINTER=%08x ", ntohl(ic->icmp6_pointer));
/* Fall through */
case ICMPV6_DEST_UNREACH:
case ICMPV6_PKT_TOOBIG:
case ICMPV6_TIME_EXCEED:
/* Max length: 3+maxlen */
if (recurse) {
- printk("[");
- dump_packet(info, skb, ptr + sizeof(_icmp6h),
- 0);
- printk("] ");
+ sb_add(m, "[");
+ dump_packet(m, info, skb,
+ ptr + sizeof(_icmp6h), 0);
+ sb_add(m, "] ");
}
/* Max length: 10 "MTU=65535 " */
if (ic->icmp6_type == ICMPV6_PKT_TOOBIG)
- printk("MTU=%u ", ntohl(ic->icmp6_mtu));
+ sb_add(m, "MTU=%u ", ntohl(ic->icmp6_mtu));
}
break;
}
/* Max length: 10 "PROTO=255 " */
default:
- printk("PROTO=%u ", currenthdr);
+ sb_add(m, "PROTO=%u ", currenthdr);
}
/* Max length: 15 "UID=4294967295 " */
if ((logflags & IP6T_LOG_UID) && recurse && skb->sk) {
read_lock_bh(&skb->sk->sk_callback_lock);
if (skb->sk->sk_socket && skb->sk->sk_socket->file)
- printk("UID=%u GID=%u ",
+ sb_add(m, "UID=%u GID=%u ",
skb->sk->sk_socket->file->f_cred->fsuid,
skb->sk->sk_socket->file->f_cred->fsgid);
read_unlock_bh(&skb->sk->sk_callback_lock);
/* Max length: 16 "MARK=0xFFFFFFFF " */
if (!recurse && skb->mark)
- printk("MARK=0x%x ", skb->mark);
+ sb_add(m, "MARK=0x%x ", skb->mark);
}
-static void dump_mac_header(const struct nf_loginfo *info,
+static void dump_mac_header(struct sbuff *m,
+ const struct nf_loginfo *info,
const struct sk_buff *skb)
{
struct net_device *dev = skb->dev;
switch (dev->type) {
case ARPHRD_ETHER:
- printk("MACSRC=%pM MACDST=%pM MACPROTO=%04x ",
+ sb_add(m, "MACSRC=%pM MACDST=%pM MACPROTO=%04x ",
eth_hdr(skb)->h_source, eth_hdr(skb)->h_dest,
ntohs(eth_hdr(skb)->h_proto));
return;
}
fallback:
- printk("MAC=");
+ sb_add(m, "MAC=");
if (dev->hard_header_len &&
skb->mac_header != skb->network_header) {
const unsigned char *p = skb_mac_header(skb);
p = NULL;
if (p != NULL) {
- printk("%02x", *p++);
+ sb_add(m, "%02x", *p++);
for (i = 1; i < len; i++)
- printk(":%02x", p[i]);
+ sb_add(m, ":%02x", p[i]);
}
- printk(" ");
+ sb_add(m, " ");
if (dev->type == ARPHRD_SIT) {
const struct iphdr *iph =
(struct iphdr *)skb_mac_header(skb);
- printk("TUNNEL=%pI4->%pI4 ", &iph->saddr, &iph->daddr);
+ sb_add(m, "TUNNEL=%pI4->%pI4 ", &iph->saddr, &iph->daddr);
}
} else
- printk(" ");
+ sb_add(m, " ");
}
static struct nf_loginfo default_loginfo = {
const struct nf_loginfo *loginfo,
const char *prefix)
{
+ struct sbuff *m = sb_open();
+
if (!loginfo)
loginfo = &default_loginfo;
- spin_lock_bh(&log_lock);
- printk("<%d>%sIN=%s OUT=%s ", loginfo->u.log.level,
- prefix,
- in ? in->name : "",
- out ? out->name : "");
+ sb_add(m, "<%d>%sIN=%s OUT=%s ", loginfo->u.log.level,
+ prefix,
+ in ? in->name : "",
+ out ? out->name : "");
/* MAC logging for input path only. */
if (in && !out)
- dump_mac_header(loginfo, skb);
+ dump_mac_header(m, loginfo, skb);
+
+ dump_packet(m, loginfo, skb, skb_network_offset(skb), 1);
- dump_packet(loginfo, skb, skb_network_offset(skb), 1);
- printk("\n");
- spin_unlock_bh(&log_lock);
+ sb_close(m);
}
static unsigned int
#include <linux/module.h>
#include <linux/skbuff.h>
#include <linux/icmp.h>
-#include <linux/sysctl.h>
#include <net/ipv6.h>
#include <net/inet_frag.h>
#include <net/netfilter/nf_conntrack_core.h>
#include <net/netfilter/nf_conntrack_zones.h>
#include <net/netfilter/ipv6/nf_conntrack_ipv6.h>
+#include <net/netfilter/ipv6/nf_defrag_ipv6.h>
#include <net/netfilter/nf_log.h>
static bool ipv6_pkt_to_tuple(const struct sk_buff *skb, unsigned int nhoff,
return nf_conntrack_confirm(skb);
}
-static enum ip6_defrag_users nf_ct6_defrag_user(unsigned int hooknum,
- struct sk_buff *skb)
-{
- u16 zone = NF_CT_DEFAULT_ZONE;
-
- if (skb->nfct)
- zone = nf_ct_zone((struct nf_conn *)skb->nfct);
-
-#ifdef CONFIG_BRIDGE_NETFILTER
- if (skb->nf_bridge &&
- skb->nf_bridge->mask & BRNF_NF_BRIDGE_PREROUTING)
- return IP6_DEFRAG_CONNTRACK_BRIDGE_IN + zone;
-#endif
- if (hooknum == NF_INET_PRE_ROUTING)
- return IP6_DEFRAG_CONNTRACK_IN + zone;
- else
- return IP6_DEFRAG_CONNTRACK_OUT + zone;
-
-}
-
-static unsigned int ipv6_defrag(unsigned int hooknum,
- struct sk_buff *skb,
- const struct net_device *in,
- const struct net_device *out,
- int (*okfn)(struct sk_buff *))
-{
- struct sk_buff *reasm;
-
- /* Previously seen (loopback)? */
- if (skb->nfct && !nf_ct_is_template((struct nf_conn *)skb->nfct))
- return NF_ACCEPT;
-
- reasm = nf_ct_frag6_gather(skb, nf_ct6_defrag_user(hooknum, skb));
- /* queued */
- if (reasm == NULL)
- return NF_STOLEN;
-
- /* error occured or not fragmented */
- if (reasm == skb)
- return NF_ACCEPT;
-
- nf_ct_frag6_output(hooknum, reasm, (struct net_device *)in,
- (struct net_device *)out, okfn);
-
- return NF_STOLEN;
-}
-
static unsigned int __ipv6_conntrack_in(struct net *net,
unsigned int hooknum,
struct sk_buff *skb,
}
static struct nf_hook_ops ipv6_conntrack_ops[] __read_mostly = {
- {
- .hook = ipv6_defrag,
- .owner = THIS_MODULE,
- .pf = NFPROTO_IPV6,
- .hooknum = NF_INET_PRE_ROUTING,
- .priority = NF_IP6_PRI_CONNTRACK_DEFRAG,
- },
{
.hook = ipv6_conntrack_in,
.owner = THIS_MODULE,
.hooknum = NF_INET_LOCAL_OUT,
.priority = NF_IP6_PRI_CONNTRACK,
},
- {
- .hook = ipv6_defrag,
- .owner = THIS_MODULE,
- .pf = NFPROTO_IPV6,
- .hooknum = NF_INET_LOCAL_OUT,
- .priority = NF_IP6_PRI_CONNTRACK_DEFRAG,
- },
{
.hook = ipv6_confirm,
.owner = THIS_MODULE,
.nlattr_tuple_size = ipv6_nlattr_tuple_size,
.nlattr_to_tuple = ipv6_nlattr_to_tuple,
.nla_policy = ipv6_nla_policy,
-#endif
-#ifdef CONFIG_SYSCTL
- .ctl_table_path = nf_net_netfilter_sysctl_path,
- .ctl_table = nf_ct_ipv6_sysctl_table,
#endif
.me = THIS_MODULE,
};
int ret = 0;
need_conntrack();
+ nf_defrag_ipv6_enable();
- ret = nf_ct_frag6_init();
- if (ret < 0) {
- pr_err("nf_conntrack_ipv6: can't initialize frag6.\n");
- return ret;
- }
ret = nf_conntrack_l4proto_register(&nf_conntrack_l4proto_tcp6);
if (ret < 0) {
pr_err("nf_conntrack_ipv6: can't register tcp.\n");
- goto cleanup_frag6;
+ return ret;
}
ret = nf_conntrack_l4proto_register(&nf_conntrack_l4proto_udp6);
nf_conntrack_l4proto_unregister(&nf_conntrack_l4proto_udp6);
cleanup_tcp:
nf_conntrack_l4proto_unregister(&nf_conntrack_l4proto_tcp6);
- cleanup_frag6:
- nf_ct_frag6_cleanup();
return ret;
}
nf_conntrack_l4proto_unregister(&nf_conntrack_l4proto_icmpv6);
nf_conntrack_l4proto_unregister(&nf_conntrack_l4proto_udp6);
nf_conntrack_l4proto_unregister(&nf_conntrack_l4proto_tcp6);
- nf_ct_frag6_cleanup();
}
module_init(nf_conntrack_l3proto_ipv6_init);
static struct netns_frags nf_init_frags;
#ifdef CONFIG_SYSCTL
-struct ctl_table nf_ct_ipv6_sysctl_table[] = {
+struct ctl_table nf_ct_frag6_sysctl_table[] = {
{
.procname = "nf_conntrack_frag6_timeout",
.data = &nf_init_frags.timeout,
},
{ }
};
+
+static struct ctl_table_header *nf_ct_frag6_sysctl_header;
#endif
static unsigned int nf_hashfn(struct inet_frag_queue *q)
inet_frags_init_net(&nf_init_frags);
inet_frags_init(&nf_frags);
+ nf_ct_frag6_sysctl_header = register_sysctl_paths(nf_net_netfilter_sysctl_path,
+ nf_ct_frag6_sysctl_table);
+ if (!nf_ct_frag6_sysctl_header) {
+ inet_frags_fini(&nf_frags);
+ return -ENOMEM;
+ }
+
return 0;
}
void nf_ct_frag6_cleanup(void)
{
+ unregister_sysctl_table(nf_ct_frag6_sysctl_header);
+ nf_ct_frag6_sysctl_header = NULL;
+
inet_frags_fini(&nf_frags);
nf_init_frags.low_thresh = 0;
--- /dev/null
+/* (C) 1999-2001 Paul `Rusty' Russell
+ * (C) 2002-2004 Netfilter Core Team <coreteam@netfilter.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/types.h>
+#include <linux/ipv6.h>
+#include <linux/in6.h>
+#include <linux/netfilter.h>
+#include <linux/module.h>
+#include <linux/skbuff.h>
+#include <linux/icmp.h>
+#include <linux/sysctl.h>
+#include <net/ipv6.h>
+#include <net/inet_frag.h>
+
+#include <linux/netfilter_ipv6.h>
+#include <linux/netfilter_bridge.h>
+#include <net/netfilter/nf_conntrack.h>
+#include <net/netfilter/nf_conntrack_helper.h>
+#include <net/netfilter/nf_conntrack_l4proto.h>
+#include <net/netfilter/nf_conntrack_l3proto.h>
+#include <net/netfilter/nf_conntrack_core.h>
+#include <net/netfilter/nf_conntrack_zones.h>
+#include <net/netfilter/ipv6/nf_conntrack_ipv6.h>
+#include <net/netfilter/ipv6/nf_defrag_ipv6.h>
+
+static enum ip6_defrag_users nf_ct6_defrag_user(unsigned int hooknum,
+ struct sk_buff *skb)
+{
+ u16 zone = NF_CT_DEFAULT_ZONE;
+
+ if (skb->nfct)
+ zone = nf_ct_zone((struct nf_conn *)skb->nfct);
+
+#ifdef CONFIG_BRIDGE_NETFILTER
+ if (skb->nf_bridge &&
+ skb->nf_bridge->mask & BRNF_NF_BRIDGE_PREROUTING)
+ return IP6_DEFRAG_CONNTRACK_BRIDGE_IN + zone;
+#endif
+ if (hooknum == NF_INET_PRE_ROUTING)
+ return IP6_DEFRAG_CONNTRACK_IN + zone;
+ else
+ return IP6_DEFRAG_CONNTRACK_OUT + zone;
+
+}
+
+static unsigned int ipv6_defrag(unsigned int hooknum,
+ struct sk_buff *skb,
+ const struct net_device *in,
+ const struct net_device *out,
+ int (*okfn)(struct sk_buff *))
+{
+ struct sk_buff *reasm;
+
+ /* Previously seen (loopback)? */
+ if (skb->nfct && !nf_ct_is_template((struct nf_conn *)skb->nfct))
+ return NF_ACCEPT;
+
+ reasm = nf_ct_frag6_gather(skb, nf_ct6_defrag_user(hooknum, skb));
+ /* queued */
+ if (reasm == NULL)
+ return NF_STOLEN;
+
+ /* error occured or not fragmented */
+ if (reasm == skb)
+ return NF_ACCEPT;
+
+ nf_ct_frag6_output(hooknum, reasm, (struct net_device *)in,
+ (struct net_device *)out, okfn);
+
+ return NF_STOLEN;
+}
+
+static struct nf_hook_ops ipv6_defrag_ops[] = {
+ {
+ .hook = ipv6_defrag,
+ .owner = THIS_MODULE,
+ .pf = NFPROTO_IPV6,
+ .hooknum = NF_INET_PRE_ROUTING,
+ .priority = NF_IP6_PRI_CONNTRACK_DEFRAG,
+ },
+ {
+ .hook = ipv6_defrag,
+ .owner = THIS_MODULE,
+ .pf = NFPROTO_IPV6,
+ .hooknum = NF_INET_LOCAL_OUT,
+ .priority = NF_IP6_PRI_CONNTRACK_DEFRAG,
+ },
+};
+
+static int __init nf_defrag_init(void)
+{
+ int ret = 0;
+
+ ret = nf_ct_frag6_init();
+ if (ret < 0) {
+ pr_err("nf_defrag_ipv6: can't initialize frag6.\n");
+ return ret;
+ }
+ ret = nf_register_hooks(ipv6_defrag_ops, ARRAY_SIZE(ipv6_defrag_ops));
+ if (ret < 0) {
+ pr_err("nf_defrag_ipv6: can't register hooks\n");
+ goto cleanup_frag6;
+ }
+ return ret;
+
+cleanup_frag6:
+ nf_ct_frag6_cleanup();
+ return ret;
+
+}
+
+static void __exit nf_defrag_fini(void)
+{
+ nf_unregister_hooks(ipv6_defrag_ops, ARRAY_SIZE(ipv6_defrag_ops));
+ nf_ct_frag6_cleanup();
+}
+
+void nf_defrag_ipv6_enable(void)
+{
+}
+EXPORT_SYMBOL_GPL(nf_defrag_ipv6_enable);
+
+module_init(nf_defrag_init);
+module_exit(nf_defrag_fini);
+
+MODULE_LICENSE("GPL");
newsk = tcp_create_openreq_child(sk, req, skb);
if (newsk == NULL)
- goto out;
+ goto out_nonewsk;
/*
* No need to charge this sock to the relevant IPv6 refcnt debug socks
}
#endif
+ if (__inet_inherit_port(sk, newsk) < 0) {
+ sock_put(newsk);
+ goto out;
+ }
__inet6_hash(newsk, NULL);
- __inet_inherit_port(sk, newsk);
return newsk;
out_overflow:
NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_LISTENOVERFLOWS);
-out:
- NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_LISTENDROPS);
+out_nonewsk:
if (opt && opt != np->opt)
sock_kfree_s(sk, opt, opt->tot_len);
dst_release(dst);
+out:
+ NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_LISTENDROPS);
return NULL;
}
static inline int compute_score(struct sock *sk, struct net *net,
unsigned short hnum,
- struct in6_addr *saddr, __be16 sport,
- struct in6_addr *daddr, __be16 dport,
+ const struct in6_addr *saddr, __be16 sport,
+ const struct in6_addr *daddr, __be16 dport,
int dif)
{
int score = -1;
}
static struct sock *__udp6_lib_lookup(struct net *net,
- struct in6_addr *saddr, __be16 sport,
- struct in6_addr *daddr, __be16 dport,
+ const struct in6_addr *saddr, __be16 sport,
+ const struct in6_addr *daddr, __be16 dport,
int dif, struct udp_table *udptable)
{
struct sock *sk, *result;
udptable);
}
+struct sock *udp6_lib_lookup(struct net *net, const struct in6_addr *saddr, __be16 sport,
+ const struct in6_addr *daddr, __be16 dport, int dif)
+{
+ return __udp6_lib_lookup(net, saddr, sport, daddr, dport, dif, &udp_table);
+}
+EXPORT_SYMBOL_GPL(udp6_lib_lookup);
+
+
/*
* This should be easy, if there is something there we
* return it, otherwise we block.
void nf_unregister_hooks(struct nf_hook_ops *reg, unsigned int n)
{
- unsigned int i;
-
- for (i = 0; i < n; i++)
- nf_unregister_hook(®[i]);
+ while (n-- > 0)
+ nf_unregister_hook(®[n]);
}
EXPORT_SYMBOL(nf_unregister_hooks);
#
menuconfig IP_VS
tristate "IP virtual server support"
- depends on NET && INET && NETFILTER && NF_CONNTRACK
+ depends on NET && INET && NETFILTER
---help---
IP Virtual Server support will let you build a high-performance
virtual server based on cluster of two or more real servers. This
config IP_VS_FTP
tristate "FTP protocol helper"
- depends on IP_VS_PROTO_TCP && NF_NAT
+ depends on IP_VS_PROTO_TCP && NF_CONNTRACK && NF_NAT
+ select IP_VS_NFCT
---help---
FTP is a protocol that transfers IP address and/or port number in
the payload. In the virtual server via Network Address Translation,
If you want to compile it in kernel, say Y. To compile it as a
module, choose M here. If unsure, say N.
+config IP_VS_NFCT
+ bool "Netfilter connection tracking"
+ depends on NF_CONNTRACK
+ ---help---
+ The Netfilter connection tracking support allows the IPVS
+ connection state to be exported to the Netfilter framework
+ for filtering purposes.
+
+config IP_VS_PE_SIP
+ tristate "SIP persistence engine"
+ depends on IP_VS_PROTO_UDP
+ depends on NF_CONNTRACK_SIP
+ ---help---
+ Allow persistence based on the SIP Call-ID
+
endif # IP_VS
ip_vs_proto-objs-$(CONFIG_IP_VS_PROTO_AH_ESP) += ip_vs_proto_ah_esp.o
ip_vs_proto-objs-$(CONFIG_IP_VS_PROTO_SCTP) += ip_vs_proto_sctp.o
+ip_vs-extra_objs-y :=
+ip_vs-extra_objs-$(CONFIG_IP_VS_NFCT) += ip_vs_nfct.o
+
ip_vs-objs := ip_vs_conn.o ip_vs_core.o ip_vs_ctl.o ip_vs_sched.o \
ip_vs_xmit.o ip_vs_app.o ip_vs_sync.o \
- ip_vs_est.o ip_vs_proto.o \
- $(ip_vs_proto-objs-y)
+ ip_vs_est.o ip_vs_proto.o ip_vs_pe.o \
+ $(ip_vs_proto-objs-y) $(ip_vs-extra_objs-y)
# IPVS core
# IPVS application helpers
obj-$(CONFIG_IP_VS_FTP) += ip_vs_ftp.o
+
+# IPVS connection template retrievers
+obj-$(CONFIG_IP_VS_PE_SIP) += ip_vs_pe_sip.o
goto out;
list_add(&inc->a_list, &app->incs_list);
- IP_VS_DBG(9, "%s application %s:%u registered\n",
- pp->name, inc->name, inc->port);
+ IP_VS_DBG(9, "%s App %s:%u registered\n",
+ pp->name, inc->name, ntohs(inc->port));
return 0;
pp->unregister_app(inc);
IP_VS_DBG(9, "%s App %s:%u unregistered\n",
- pp->name, inc->name, inc->port);
+ pp->name, inc->name, ntohs(inc->port));
list_del(&inc->a_list);
& ip_vs_conn_tab_mask;
}
+static unsigned int ip_vs_conn_hashkey_param(const struct ip_vs_conn_param *p,
+ bool inverse)
+{
+ const union nf_inet_addr *addr;
+ __be16 port;
+
+ if (p->pe_data && p->pe->hashkey_raw)
+ return p->pe->hashkey_raw(p, ip_vs_conn_rnd, inverse) &
+ ip_vs_conn_tab_mask;
+
+ if (likely(!inverse)) {
+ addr = p->caddr;
+ port = p->cport;
+ } else {
+ addr = p->vaddr;
+ port = p->vport;
+ }
+
+ return ip_vs_conn_hashkey(p->af, p->protocol, addr, port);
+}
+
+static unsigned int ip_vs_conn_hashkey_conn(const struct ip_vs_conn *cp)
+{
+ struct ip_vs_conn_param p;
+
+ ip_vs_conn_fill_param(cp->af, cp->protocol, &cp->caddr, cp->cport,
+ NULL, 0, &p);
+
+ if (cp->dest && cp->dest->svc->pe) {
+ p.pe = cp->dest->svc->pe;
+ p.pe_data = cp->pe_data;
+ p.pe_data_len = cp->pe_data_len;
+ }
+
+ return ip_vs_conn_hashkey_param(&p, false);
+}
/*
* Hashes ip_vs_conn in ip_vs_conn_tab by proto,addr,port.
return 0;
/* Hash by protocol, client address and port */
- hash = ip_vs_conn_hashkey(cp->af, cp->protocol, &cp->caddr, cp->cport);
+ hash = ip_vs_conn_hashkey_conn(cp);
ct_write_lock(hash);
spin_lock(&cp->lock);
int ret;
/* unhash it and decrease its reference counter */
- hash = ip_vs_conn_hashkey(cp->af, cp->protocol, &cp->caddr, cp->cport);
+ hash = ip_vs_conn_hashkey_conn(cp);
ct_write_lock(hash);
spin_lock(&cp->lock);
/*
* Gets ip_vs_conn associated with supplied parameters in the ip_vs_conn_tab.
* Called for pkts coming from OUTside-to-INside.
- * s_addr, s_port: pkt source address (foreign host)
- * d_addr, d_port: pkt dest address (load balancer)
+ * p->caddr, p->cport: pkt source address (foreign host)
+ * p->vaddr, p->vport: pkt dest address (load balancer)
*/
-static inline struct ip_vs_conn *__ip_vs_conn_in_get
-(int af, int protocol, const union nf_inet_addr *s_addr, __be16 s_port,
- const union nf_inet_addr *d_addr, __be16 d_port)
+static inline struct ip_vs_conn *
+__ip_vs_conn_in_get(const struct ip_vs_conn_param *p)
{
unsigned hash;
struct ip_vs_conn *cp;
- hash = ip_vs_conn_hashkey(af, protocol, s_addr, s_port);
+ hash = ip_vs_conn_hashkey_param(p, false);
ct_read_lock(hash);
list_for_each_entry(cp, &ip_vs_conn_tab[hash], c_list) {
- if (cp->af == af &&
- ip_vs_addr_equal(af, s_addr, &cp->caddr) &&
- ip_vs_addr_equal(af, d_addr, &cp->vaddr) &&
- s_port == cp->cport && d_port == cp->vport &&
- ((!s_port) ^ (!(cp->flags & IP_VS_CONN_F_NO_CPORT))) &&
- protocol == cp->protocol) {
+ if (cp->af == p->af &&
+ ip_vs_addr_equal(p->af, p->caddr, &cp->caddr) &&
+ ip_vs_addr_equal(p->af, p->vaddr, &cp->vaddr) &&
+ p->cport == cp->cport && p->vport == cp->vport &&
+ ((!p->cport) ^ (!(cp->flags & IP_VS_CONN_F_NO_CPORT))) &&
+ p->protocol == cp->protocol) {
/* HIT */
atomic_inc(&cp->refcnt);
ct_read_unlock(hash);
return NULL;
}
-struct ip_vs_conn *ip_vs_conn_in_get
-(int af, int protocol, const union nf_inet_addr *s_addr, __be16 s_port,
- const union nf_inet_addr *d_addr, __be16 d_port)
+struct ip_vs_conn *ip_vs_conn_in_get(const struct ip_vs_conn_param *p)
{
struct ip_vs_conn *cp;
- cp = __ip_vs_conn_in_get(af, protocol, s_addr, s_port, d_addr, d_port);
- if (!cp && atomic_read(&ip_vs_conn_no_cport_cnt))
- cp = __ip_vs_conn_in_get(af, protocol, s_addr, 0, d_addr,
- d_port);
+ cp = __ip_vs_conn_in_get(p);
+ if (!cp && atomic_read(&ip_vs_conn_no_cport_cnt)) {
+ struct ip_vs_conn_param cport_zero_p = *p;
+ cport_zero_p.cport = 0;
+ cp = __ip_vs_conn_in_get(&cport_zero_p);
+ }
IP_VS_DBG_BUF(9, "lookup/in %s %s:%d->%s:%d %s\n",
- ip_vs_proto_name(protocol),
- IP_VS_DBG_ADDR(af, s_addr), ntohs(s_port),
- IP_VS_DBG_ADDR(af, d_addr), ntohs(d_port),
+ ip_vs_proto_name(p->protocol),
+ IP_VS_DBG_ADDR(p->af, p->caddr), ntohs(p->cport),
+ IP_VS_DBG_ADDR(p->af, p->vaddr), ntohs(p->vport),
cp ? "hit" : "not hit");
return cp;
}
+static int
+ip_vs_conn_fill_param_proto(int af, const struct sk_buff *skb,
+ const struct ip_vs_iphdr *iph,
+ unsigned int proto_off, int inverse,
+ struct ip_vs_conn_param *p)
+{
+ __be16 _ports[2], *pptr;
+
+ pptr = skb_header_pointer(skb, proto_off, sizeof(_ports), _ports);
+ if (pptr == NULL)
+ return 1;
+
+ if (likely(!inverse))
+ ip_vs_conn_fill_param(af, iph->protocol, &iph->saddr, pptr[0],
+ &iph->daddr, pptr[1], p);
+ else
+ ip_vs_conn_fill_param(af, iph->protocol, &iph->daddr, pptr[1],
+ &iph->saddr, pptr[0], p);
+ return 0;
+}
+
struct ip_vs_conn *
ip_vs_conn_in_get_proto(int af, const struct sk_buff *skb,
struct ip_vs_protocol *pp,
const struct ip_vs_iphdr *iph,
unsigned int proto_off, int inverse)
{
- __be16 _ports[2], *pptr;
+ struct ip_vs_conn_param p;
- pptr = skb_header_pointer(skb, proto_off, sizeof(_ports), _ports);
- if (pptr == NULL)
+ if (ip_vs_conn_fill_param_proto(af, skb, iph, proto_off, inverse, &p))
return NULL;
- if (likely(!inverse))
- return ip_vs_conn_in_get(af, iph->protocol,
- &iph->saddr, pptr[0],
- &iph->daddr, pptr[1]);
- else
- return ip_vs_conn_in_get(af, iph->protocol,
- &iph->daddr, pptr[1],
- &iph->saddr, pptr[0]);
+ return ip_vs_conn_in_get(&p);
}
EXPORT_SYMBOL_GPL(ip_vs_conn_in_get_proto);
/* Get reference to connection template */
-struct ip_vs_conn *ip_vs_ct_in_get
-(int af, int protocol, const union nf_inet_addr *s_addr, __be16 s_port,
- const union nf_inet_addr *d_addr, __be16 d_port)
+struct ip_vs_conn *ip_vs_ct_in_get(const struct ip_vs_conn_param *p)
{
unsigned hash;
struct ip_vs_conn *cp;
- hash = ip_vs_conn_hashkey(af, protocol, s_addr, s_port);
+ hash = ip_vs_conn_hashkey_param(p, false);
ct_read_lock(hash);
list_for_each_entry(cp, &ip_vs_conn_tab[hash], c_list) {
- if (cp->af == af &&
- ip_vs_addr_equal(af, s_addr, &cp->caddr) &&
+ if (p->pe_data && p->pe->ct_match) {
+ if (p->pe->ct_match(p, cp))
+ goto out;
+ continue;
+ }
+
+ if (cp->af == p->af &&
+ ip_vs_addr_equal(p->af, p->caddr, &cp->caddr) &&
/* protocol should only be IPPROTO_IP if
- * d_addr is a fwmark */
- ip_vs_addr_equal(protocol == IPPROTO_IP ? AF_UNSPEC : af,
- d_addr, &cp->vaddr) &&
- s_port == cp->cport && d_port == cp->vport &&
+ * p->vaddr is a fwmark */
+ ip_vs_addr_equal(p->protocol == IPPROTO_IP ? AF_UNSPEC :
+ p->af, p->vaddr, &cp->vaddr) &&
+ p->cport == cp->cport && p->vport == cp->vport &&
cp->flags & IP_VS_CONN_F_TEMPLATE &&
- protocol == cp->protocol) {
- /* HIT */
- atomic_inc(&cp->refcnt);
+ p->protocol == cp->protocol)
goto out;
- }
}
cp = NULL;
out:
+ if (cp)
+ atomic_inc(&cp->refcnt);
ct_read_unlock(hash);
IP_VS_DBG_BUF(9, "template lookup/in %s %s:%d->%s:%d %s\n",
- ip_vs_proto_name(protocol),
- IP_VS_DBG_ADDR(af, s_addr), ntohs(s_port),
- IP_VS_DBG_ADDR(af, d_addr), ntohs(d_port),
+ ip_vs_proto_name(p->protocol),
+ IP_VS_DBG_ADDR(p->af, p->caddr), ntohs(p->cport),
+ IP_VS_DBG_ADDR(p->af, p->vaddr), ntohs(p->vport),
cp ? "hit" : "not hit");
return cp;
}
-/*
- * Gets ip_vs_conn associated with supplied parameters in the ip_vs_conn_tab.
- * Called for pkts coming from inside-to-OUTside.
- * s_addr, s_port: pkt source address (inside host)
- * d_addr, d_port: pkt dest address (foreign host)
- */
-struct ip_vs_conn *ip_vs_conn_out_get
-(int af, int protocol, const union nf_inet_addr *s_addr, __be16 s_port,
- const union nf_inet_addr *d_addr, __be16 d_port)
+/* Gets ip_vs_conn associated with supplied parameters in the ip_vs_conn_tab.
+ * Called for pkts coming from inside-to-OUTside.
+ * p->caddr, p->cport: pkt source address (inside host)
+ * p->vaddr, p->vport: pkt dest address (foreign host) */
+struct ip_vs_conn *ip_vs_conn_out_get(const struct ip_vs_conn_param *p)
{
unsigned hash;
struct ip_vs_conn *cp, *ret=NULL;
/*
* Check for "full" addressed entries
*/
- hash = ip_vs_conn_hashkey(af, protocol, d_addr, d_port);
+ hash = ip_vs_conn_hashkey_param(p, true);
ct_read_lock(hash);
list_for_each_entry(cp, &ip_vs_conn_tab[hash], c_list) {
- if (cp->af == af &&
- ip_vs_addr_equal(af, d_addr, &cp->caddr) &&
- ip_vs_addr_equal(af, s_addr, &cp->daddr) &&
- d_port == cp->cport && s_port == cp->dport &&
- protocol == cp->protocol) {
+ if (cp->af == p->af &&
+ ip_vs_addr_equal(p->af, p->vaddr, &cp->caddr) &&
+ ip_vs_addr_equal(p->af, p->caddr, &cp->daddr) &&
+ p->vport == cp->cport && p->cport == cp->dport &&
+ p->protocol == cp->protocol) {
/* HIT */
atomic_inc(&cp->refcnt);
ret = cp;
ct_read_unlock(hash);
IP_VS_DBG_BUF(9, "lookup/out %s %s:%d->%s:%d %s\n",
- ip_vs_proto_name(protocol),
- IP_VS_DBG_ADDR(af, s_addr), ntohs(s_port),
- IP_VS_DBG_ADDR(af, d_addr), ntohs(d_port),
+ ip_vs_proto_name(p->protocol),
+ IP_VS_DBG_ADDR(p->af, p->caddr), ntohs(p->cport),
+ IP_VS_DBG_ADDR(p->af, p->vaddr), ntohs(p->vport),
ret ? "hit" : "not hit");
return ret;
const struct ip_vs_iphdr *iph,
unsigned int proto_off, int inverse)
{
- __be16 _ports[2], *pptr;
+ struct ip_vs_conn_param p;
- pptr = skb_header_pointer(skb, proto_off, sizeof(_ports), _ports);
- if (pptr == NULL)
+ if (ip_vs_conn_fill_param_proto(af, skb, iph, proto_off, inverse, &p))
return NULL;
- if (likely(!inverse))
- return ip_vs_conn_out_get(af, iph->protocol,
- &iph->saddr, pptr[0],
- &iph->daddr, pptr[1]);
- else
- return ip_vs_conn_out_get(af, iph->protocol,
- &iph->daddr, pptr[1],
- &iph->saddr, pptr[0]);
+ return ip_vs_conn_out_get(&p);
}
EXPORT_SYMBOL_GPL(ip_vs_conn_out_get_proto);
static inline void
ip_vs_bind_dest(struct ip_vs_conn *cp, struct ip_vs_dest *dest)
{
+ unsigned int conn_flags;
+
/* if dest is NULL, then return directly */
if (!dest)
return;
/* Increase the refcnt counter of the dest */
atomic_inc(&dest->refcnt);
+ conn_flags = atomic_read(&dest->conn_flags);
+ if (cp->protocol != IPPROTO_UDP)
+ conn_flags &= ~IP_VS_CONN_F_ONE_PACKET;
/* Bind with the destination and its corresponding transmitter */
- if ((cp->flags & IP_VS_CONN_F_SYNC) &&
- (!(cp->flags & IP_VS_CONN_F_TEMPLATE)))
+ if (cp->flags & IP_VS_CONN_F_SYNC) {
/* if the connection is not template and is created
* by sync, preserve the activity flag.
*/
- cp->flags |= atomic_read(&dest->conn_flags) &
- (~IP_VS_CONN_F_INACTIVE);
- else
- cp->flags |= atomic_read(&dest->conn_flags);
+ if (!(cp->flags & IP_VS_CONN_F_TEMPLATE))
+ conn_flags &= ~IP_VS_CONN_F_INACTIVE;
+ /* connections inherit forwarding method from dest */
+ cp->flags &= ~IP_VS_CONN_F_FWD_MASK;
+ }
+ cp->flags |= conn_flags;
cp->dest = dest;
IP_VS_DBG_BUF(7, "Bind-dest %s c:%s:%d v:%s:%d "
if (cp->control)
ip_vs_control_del(cp);
+ if (cp->flags & IP_VS_CONN_F_NFCT)
+ ip_vs_conn_drop_conntrack(cp);
+
+ kfree(cp->pe_data);
if (unlikely(cp->app != NULL))
ip_vs_unbind_app(cp);
ip_vs_unbind_dest(cp);
* Create a new connection entry and hash it into the ip_vs_conn_tab
*/
struct ip_vs_conn *
-ip_vs_conn_new(int af, int proto, const union nf_inet_addr *caddr, __be16 cport,
- const union nf_inet_addr *vaddr, __be16 vport,
+ip_vs_conn_new(const struct ip_vs_conn_param *p,
const union nf_inet_addr *daddr, __be16 dport, unsigned flags,
struct ip_vs_dest *dest)
{
struct ip_vs_conn *cp;
- struct ip_vs_protocol *pp = ip_vs_proto_get(proto);
+ struct ip_vs_protocol *pp = ip_vs_proto_get(p->protocol);
cp = kmem_cache_zalloc(ip_vs_conn_cachep, GFP_ATOMIC);
if (cp == NULL) {
INIT_LIST_HEAD(&cp->c_list);
setup_timer(&cp->timer, ip_vs_conn_expire, (unsigned long)cp);
- cp->af = af;
- cp->protocol = proto;
- ip_vs_addr_copy(af, &cp->caddr, caddr);
- cp->cport = cport;
- ip_vs_addr_copy(af, &cp->vaddr, vaddr);
- cp->vport = vport;
+ cp->af = p->af;
+ cp->protocol = p->protocol;
+ ip_vs_addr_copy(p->af, &cp->caddr, p->caddr);
+ cp->cport = p->cport;
+ ip_vs_addr_copy(p->af, &cp->vaddr, p->vaddr);
+ cp->vport = p->vport;
/* proto should only be IPPROTO_IP if d_addr is a fwmark */
- ip_vs_addr_copy(proto == IPPROTO_IP ? AF_UNSPEC : af,
+ ip_vs_addr_copy(p->protocol == IPPROTO_IP ? AF_UNSPEC : p->af,
&cp->daddr, daddr);
cp->dport = dport;
cp->flags = flags;
+ if (flags & IP_VS_CONN_F_TEMPLATE && p->pe_data) {
+ cp->pe_data = p->pe_data;
+ cp->pe_data_len = p->pe_data_len;
+ }
spin_lock_init(&cp->lock);
/*
/* Bind its packet transmitter */
#ifdef CONFIG_IP_VS_IPV6
- if (af == AF_INET6)
+ if (p->af == AF_INET6)
ip_vs_bind_xmit_v6(cp);
else
#endif
if (unlikely(pp && atomic_read(&pp->appcnt)))
ip_vs_bind_app(cp, pp);
+ /*
+ * Allow conntrack to be preserved. By default, conntrack
+ * is created and destroyed for every packet.
+ * Sometimes keeping conntrack can be useful for
+ * IP_VS_CONN_F_ONE_PACKET too.
+ */
+
+ if (ip_vs_conntrack_enabled())
+ cp->flags |= IP_VS_CONN_F_NFCT;
+
/* Hash it in the ip_vs_conn_tab finally */
ip_vs_conn_hash(cp);
return cp;
}
-
/*
* /proc/net/ip_vs_conn entries
*/
list_for_each_entry(cp, &ip_vs_conn_tab[idx], c_list) {
if (pos-- == 0) {
seq->private = &ip_vs_conn_tab[idx];
- return cp;
+ return cp;
}
}
ct_read_unlock_bh(idx);
if (v == SEQ_START_TOKEN)
seq_puts(seq,
- "Pro FromIP FPrt ToIP TPrt DestIP DPrt State Expires\n");
+ "Pro FromIP FPrt ToIP TPrt DestIP DPrt State Expires PEName PEData\n");
else {
const struct ip_vs_conn *cp = v;
+ char pe_data[IP_VS_PENAME_MAXLEN + IP_VS_PEDATA_MAXLEN + 3];
+ size_t len = 0;
+
+ if (cp->dest && cp->pe_data &&
+ cp->dest->svc->pe->show_pe_data) {
+ pe_data[0] = ' ';
+ len = strlen(cp->dest->svc->pe->name);
+ memcpy(pe_data + 1, cp->dest->svc->pe->name, len);
+ pe_data[len + 1] = ' ';
+ len += 2;
+ len += cp->dest->svc->pe->show_pe_data(cp,
+ pe_data + len);
+ }
+ pe_data[len] = '\0';
#ifdef CONFIG_IP_VS_IPV6
if (cp->af == AF_INET6)
- seq_printf(seq, "%-3s %pI6 %04X %pI6 %04X %pI6 %04X %-11s %7lu\n",
+ seq_printf(seq, "%-3s %pI6 %04X %pI6 %04X "
+ "%pI6 %04X %-11s %7lu%s\n",
ip_vs_proto_name(cp->protocol),
&cp->caddr.in6, ntohs(cp->cport),
&cp->vaddr.in6, ntohs(cp->vport),
&cp->daddr.in6, ntohs(cp->dport),
ip_vs_state_name(cp->protocol, cp->state),
- (cp->timer.expires-jiffies)/HZ);
+ (cp->timer.expires-jiffies)/HZ, pe_data);
else
#endif
seq_printf(seq,
"%-3s %08X %04X %08X %04X"
- " %08X %04X %-11s %7lu\n",
+ " %08X %04X %-11s %7lu%s\n",
ip_vs_proto_name(cp->protocol),
ntohl(cp->caddr.ip), ntohs(cp->cport),
ntohl(cp->vaddr.ip), ntohs(cp->vport),
ntohl(cp->daddr.ip), ntohs(cp->dport),
ip_vs_state_name(cp->protocol, cp->state),
- (cp->timer.expires-jiffies)/HZ);
+ (cp->timer.expires-jiffies)/HZ, pe_data);
}
return 0;
}
#ifdef CONFIG_IP_VS_IPV6
#include <net/ipv6.h>
#include <linux/netfilter_ipv6.h>
+#include <net/ip6_route.h>
#endif
#include <net/ip_vs.h>
return pp->state_transition(cp, direction, skb, pp);
}
+static inline void
+ip_vs_conn_fill_param_persist(const struct ip_vs_service *svc,
+ struct sk_buff *skb, int protocol,
+ const union nf_inet_addr *caddr, __be16 cport,
+ const union nf_inet_addr *vaddr, __be16 vport,
+ struct ip_vs_conn_param *p)
+{
+ ip_vs_conn_fill_param(svc->af, protocol, caddr, cport, vaddr, vport, p);
+ p->pe = svc->pe;
+ if (p->pe && p->pe->fill_param)
+ p->pe->fill_param(p, skb);
+}
/*
* IPVS persistent scheduling function
*/
static struct ip_vs_conn *
ip_vs_sched_persist(struct ip_vs_service *svc,
- const struct sk_buff *skb,
+ struct sk_buff *skb,
__be16 ports[2])
{
struct ip_vs_conn *cp = NULL;
struct ip_vs_iphdr iph;
struct ip_vs_dest *dest;
struct ip_vs_conn *ct;
- __be16 dport; /* destination port to forward */
- __be16 flags;
+ __be16 dport = 0; /* destination port to forward */
+ unsigned int flags;
+ struct ip_vs_conn_param param;
union nf_inet_addr snet; /* source network of the client,
after masking */
* service, and a template like <caddr, 0, vaddr, vport, daddr, dport>
* is created for other persistent services.
*/
- if (ports[1] == svc->port) {
- /* Check if a template already exists */
- if (svc->port != FTPPORT)
- ct = ip_vs_ct_in_get(svc->af, iph.protocol, &snet, 0,
- &iph.daddr, ports[1]);
- else
- ct = ip_vs_ct_in_get(svc->af, iph.protocol, &snet, 0,
- &iph.daddr, 0);
-
- if (!ct || !ip_vs_check_template(ct)) {
- /*
- * No template found or the dest of the connection
- * template is not available.
- */
- dest = svc->scheduler->schedule(svc, skb);
- if (dest == NULL) {
- IP_VS_DBG(1, "p-schedule: no dest found.\n");
- return NULL;
- }
-
- /*
- * Create a template like <protocol,caddr,0,
- * vaddr,vport,daddr,dport> for non-ftp service,
- * and <protocol,caddr,0,vaddr,0,daddr,0>
- * for ftp service.
+ {
+ int protocol = iph.protocol;
+ const union nf_inet_addr *vaddr = &iph.daddr;
+ const union nf_inet_addr fwmark = { .ip = htonl(svc->fwmark) };
+ __be16 vport = 0;
+
+ if (ports[1] == svc->port) {
+ /* non-FTP template:
+ * <protocol, caddr, 0, vaddr, vport, daddr, dport>
+ * FTP template:
+ * <protocol, caddr, 0, vaddr, 0, daddr, 0>
*/
if (svc->port != FTPPORT)
- ct = ip_vs_conn_new(svc->af, iph.protocol,
- &snet, 0,
- &iph.daddr,
- ports[1],
- &dest->addr, dest->port,
- IP_VS_CONN_F_TEMPLATE,
- dest);
- else
- ct = ip_vs_conn_new(svc->af, iph.protocol,
- &snet, 0,
- &iph.daddr, 0,
- &dest->addr, 0,
- IP_VS_CONN_F_TEMPLATE,
- dest);
- if (ct == NULL)
- return NULL;
-
- ct->timeout = svc->timeout;
+ vport = ports[1];
} else {
- /* set destination with the found template */
- dest = ct->dest;
- }
- dport = dest->port;
- } else {
- /*
- * Note: persistent fwmark-based services and persistent
- * port zero service are handled here.
- * fwmark template: <IPPROTO_IP,caddr,0,fwmark,0,daddr,0>
- * port zero template: <protocol,caddr,0,vaddr,0,daddr,0>
- */
- if (svc->fwmark) {
- union nf_inet_addr fwmark = {
- .ip = htonl(svc->fwmark)
- };
-
- ct = ip_vs_ct_in_get(svc->af, IPPROTO_IP, &snet, 0,
- &fwmark, 0);
- } else
- ct = ip_vs_ct_in_get(svc->af, iph.protocol, &snet, 0,
- &iph.daddr, 0);
-
- if (!ct || !ip_vs_check_template(ct)) {
- /*
- * If it is not persistent port zero, return NULL,
- * otherwise create a connection template.
+ /* Note: persistent fwmark-based services and
+ * persistent port zero service are handled here.
+ * fwmark template:
+ * <IPPROTO_IP,caddr,0,fwmark,0,daddr,0>
+ * port zero template:
+ * <protocol,caddr,0,vaddr,0,daddr,0>
*/
- if (svc->port)
- return NULL;
-
- dest = svc->scheduler->schedule(svc, skb);
- if (dest == NULL) {
- IP_VS_DBG(1, "p-schedule: no dest found.\n");
- return NULL;
+ if (svc->fwmark) {
+ protocol = IPPROTO_IP;
+ vaddr = &fwmark;
}
+ }
+ ip_vs_conn_fill_param_persist(svc, skb, protocol, &snet, 0,
+ vaddr, vport, ¶m);
+ }
- /*
- * Create a template according to the service
- */
- if (svc->fwmark) {
- union nf_inet_addr fwmark = {
- .ip = htonl(svc->fwmark)
- };
-
- ct = ip_vs_conn_new(svc->af, IPPROTO_IP,
- &snet, 0,
- &fwmark, 0,
- &dest->addr, 0,
- IP_VS_CONN_F_TEMPLATE,
- dest);
- } else
- ct = ip_vs_conn_new(svc->af, iph.protocol,
- &snet, 0,
- &iph.daddr, 0,
- &dest->addr, 0,
- IP_VS_CONN_F_TEMPLATE,
- dest);
- if (ct == NULL)
- return NULL;
-
- ct->timeout = svc->timeout;
- } else {
- /* set destination with the found template */
- dest = ct->dest;
+ /* Check if a template already exists */
+ ct = ip_vs_ct_in_get(¶m);
+ if (!ct || !ip_vs_check_template(ct)) {
+ /* No template found or the dest of the connection
+ * template is not available.
+ */
+ dest = svc->scheduler->schedule(svc, skb);
+ if (!dest) {
+ IP_VS_DBG(1, "p-schedule: no dest found.\n");
+ kfree(param.pe_data);
+ return NULL;
}
- dport = ports[1];
+
+ if (ports[1] == svc->port && svc->port != FTPPORT)
+ dport = dest->port;
+
+ /* Create a template
+ * This adds param.pe_data to the template,
+ * and thus param.pe_data will be destroyed
+ * when the template expires */
+ ct = ip_vs_conn_new(¶m, &dest->addr, dport,
+ IP_VS_CONN_F_TEMPLATE, dest);
+ if (ct == NULL) {
+ kfree(param.pe_data);
+ return NULL;
+ }
+
+ ct->timeout = svc->timeout;
+ } else {
+ /* set destination with the found template */
+ dest = ct->dest;
+ kfree(param.pe_data);
}
+ dport = ports[1];
+ if (dport == svc->port && dest->port)
+ dport = dest->port;
+
flags = (svc->flags & IP_VS_SVC_F_ONEPACKET
&& iph.protocol == IPPROTO_UDP)?
IP_VS_CONN_F_ONE_PACKET : 0;
/*
* Create a new connection according to the template
*/
- cp = ip_vs_conn_new(svc->af, iph.protocol,
- &iph.saddr, ports[0],
- &iph.daddr, ports[1],
- &dest->addr, dport,
- flags,
- dest);
+ ip_vs_conn_fill_param(svc->af, iph.protocol, &iph.saddr, ports[0],
+ &iph.daddr, ports[1], ¶m);
+ cp = ip_vs_conn_new(¶m, &dest->addr, dport, flags, dest);
if (cp == NULL) {
ip_vs_conn_put(ct);
return NULL;
* Protocols supported: TCP, UDP
*/
struct ip_vs_conn *
-ip_vs_schedule(struct ip_vs_service *svc, const struct sk_buff *skb)
+ip_vs_schedule(struct ip_vs_service *svc, struct sk_buff *skb,
+ struct ip_vs_protocol *pp, int *ignored)
{
struct ip_vs_conn *cp = NULL;
struct ip_vs_iphdr iph;
struct ip_vs_dest *dest;
- __be16 _ports[2], *pptr, flags;
+ __be16 _ports[2], *pptr;
+ unsigned int flags;
+ *ignored = 1;
ip_vs_fill_iphdr(svc->af, skb_network_header(skb), &iph);
pptr = skb_header_pointer(skb, iph.len, sizeof(_ports), _ports);
if (pptr == NULL)
return NULL;
+ /*
+ * FTPDATA needs this check when using local real server.
+ * Never schedule Active FTPDATA connections from real server.
+ * For LVS-NAT they must be already created. For other methods
+ * with persistence the connection is created on SYN+ACK.
+ */
+ if (pptr[0] == FTPDATA) {
+ IP_VS_DBG_PKT(12, svc->af, pp, skb, 0,
+ "Not scheduling FTPDATA");
+ return NULL;
+ }
+
+ /*
+ * Do not schedule replies from local real server. It is risky
+ * for fwmark services but mostly for persistent services.
+ */
+ if ((!skb->dev || skb->dev->flags & IFF_LOOPBACK) &&
+ (svc->flags & IP_VS_SVC_F_PERSISTENT || svc->fwmark) &&
+ (cp = pp->conn_in_get(svc->af, skb, pp, &iph, iph.len, 1))) {
+ IP_VS_DBG_PKT(12, svc->af, pp, skb, 0,
+ "Not scheduling reply for existing connection");
+ __ip_vs_conn_put(cp);
+ return NULL;
+ }
+
/*
* Persistent service
*/
- if (svc->flags & IP_VS_SVC_F_PERSISTENT)
+ if (svc->flags & IP_VS_SVC_F_PERSISTENT) {
+ *ignored = 0;
return ip_vs_sched_persist(svc, skb, pptr);
+ }
/*
* Non-persistent service
return NULL;
}
+ *ignored = 0;
+
dest = svc->scheduler->schedule(svc, skb);
if (dest == NULL) {
IP_VS_DBG(1, "Schedule: no dest found.\n");
/*
* Create a connection entry.
*/
- cp = ip_vs_conn_new(svc->af, iph.protocol,
- &iph.saddr, pptr[0],
- &iph.daddr, pptr[1],
- &dest->addr, dest->port ? dest->port : pptr[1],
- flags,
- dest);
- if (cp == NULL)
- return NULL;
+ {
+ struct ip_vs_conn_param p;
+ ip_vs_conn_fill_param(svc->af, iph.protocol, &iph.saddr,
+ pptr[0], &iph.daddr, pptr[1], &p);
+ cp = ip_vs_conn_new(&p, &dest->addr,
+ dest->port ? dest->port : pptr[1],
+ flags, dest);
+ if (!cp)
+ return NULL;
+ }
IP_VS_DBG_BUF(6, "Schedule fwd:%c c:%s:%u v:%s:%u "
"d:%s:%u conn->flags:%X conn->refcnt:%d\n",
if (sysctl_ip_vs_cache_bypass && svc->fwmark && unicast) {
int ret, cs;
struct ip_vs_conn *cp;
- __u16 flags = (svc->flags & IP_VS_SVC_F_ONEPACKET &&
- iph.protocol == IPPROTO_UDP)?
- IP_VS_CONN_F_ONE_PACKET : 0;
+ unsigned int flags = (svc->flags & IP_VS_SVC_F_ONEPACKET &&
+ iph.protocol == IPPROTO_UDP)?
+ IP_VS_CONN_F_ONE_PACKET : 0;
union nf_inet_addr daddr = { .all = { 0, 0, 0, 0 } };
ip_vs_service_put(svc);
/* create a new connection entry */
IP_VS_DBG(6, "%s(): create a cache_bypass entry\n", __func__);
- cp = ip_vs_conn_new(svc->af, iph.protocol,
- &iph.saddr, pptr[0],
- &iph.daddr, pptr[1],
- &daddr, 0,
- IP_VS_CONN_F_BYPASS | flags,
- NULL);
- if (cp == NULL)
- return NF_DROP;
+ {
+ struct ip_vs_conn_param p;
+ ip_vs_conn_fill_param(svc->af, iph.protocol,
+ &iph.saddr, pptr[0],
+ &iph.daddr, pptr[1], &p);
+ cp = ip_vs_conn_new(&p, &daddr, 0,
+ IP_VS_CONN_F_BYPASS | flags,
+ NULL);
+ if (!cp)
+ return NF_DROP;
+ }
/* statistics */
ip_vs_in_stats(cp, skb);
* ICMP_PORT_UNREACH is sent here no matter it is TCP/UDP. --WZ
*/
#ifdef CONFIG_IP_VS_IPV6
- if (svc->af == AF_INET6)
+ if (svc->af == AF_INET6) {
+ if (!skb->dev) {
+ struct net *net = dev_net(skb_dst(skb)->dev);
+
+ skb->dev = net->loopback_dev;
+ }
icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_PORT_UNREACH, 0);
- else
+ } else
#endif
icmp_send(skb, ICMP_DEST_UNREACH, ICMP_PORT_UNREACH, 0);
return csum_fold(skb_checksum(skb, offset, skb->len - offset, 0));
}
+static inline enum ip_defrag_users ip_vs_defrag_user(unsigned int hooknum)
+{
+ if (NF_INET_LOCAL_IN == hooknum)
+ return IP_DEFRAG_VS_IN;
+ if (NF_INET_FORWARD == hooknum)
+ return IP_DEFRAG_VS_FWD;
+ return IP_DEFRAG_VS_OUT;
+}
+
static inline int ip_vs_gather_frags(struct sk_buff *skb, u_int32_t user)
{
int err = ip_defrag(skb, user);
skb->ip_summed = CHECKSUM_UNNECESSARY;
if (inout)
- IP_VS_DBG_PKT(11, pp, skb, (void *)ciph - (void *)iph,
+ IP_VS_DBG_PKT(11, AF_INET, pp, skb, (void *)ciph - (void *)iph,
"Forwarding altered outgoing ICMP");
else
- IP_VS_DBG_PKT(11, pp, skb, (void *)ciph - (void *)iph,
+ IP_VS_DBG_PKT(11, AF_INET, pp, skb, (void *)ciph - (void *)iph,
"Forwarding altered incoming ICMP");
}
skb->ip_summed = CHECKSUM_PARTIAL;
if (inout)
- IP_VS_DBG_PKT(11, pp, skb, (void *)ciph - (void *)iph,
- "Forwarding altered outgoing ICMPv6");
+ IP_VS_DBG_PKT(11, AF_INET6, pp, skb,
+ (void *)ciph - (void *)iph,
+ "Forwarding altered outgoing ICMPv6");
else
- IP_VS_DBG_PKT(11, pp, skb, (void *)ciph - (void *)iph,
- "Forwarding altered incoming ICMPv6");
+ IP_VS_DBG_PKT(11, AF_INET6, pp, skb,
+ (void *)ciph - (void *)iph,
+ "Forwarding altered incoming ICMPv6");
}
#endif
#endif
ip_vs_nat_icmp(skb, pp, cp, 1);
+#ifdef CONFIG_IP_VS_IPV6
+ if (af == AF_INET6) {
+ if (sysctl_ip_vs_snat_reroute && ip6_route_me_harder(skb) != 0)
+ goto out;
+ } else
+#endif
+ if ((sysctl_ip_vs_snat_reroute ||
+ skb_rtable(skb)->rt_flags & RTCF_LOCAL) &&
+ ip_route_me_harder(skb, RTN_LOCAL) != 0)
+ goto out;
+
/* do the statistics and put it back */
ip_vs_out_stats(cp, skb);
skb->ipvs_property = 1;
+ if (!(cp->flags & IP_VS_CONN_F_NFCT))
+ ip_vs_notrack(skb);
+ else
+ ip_vs_update_conntrack(skb, cp, 0);
verdict = NF_ACCEPT;
out:
* Find any that might be relevant, check against existing connections.
* Currently handles error types - unreachable, quench, ttl exceeded.
*/
-static int ip_vs_out_icmp(struct sk_buff *skb, int *related)
+static int ip_vs_out_icmp(struct sk_buff *skb, int *related,
+ unsigned int hooknum)
{
struct iphdr *iph;
struct icmphdr _icmph, *ic;
/* reassemble IP fragments */
if (ip_hdr(skb)->frag_off & htons(IP_MF | IP_OFFSET)) {
- if (ip_vs_gather_frags(skb, IP_DEFRAG_VS_OUT))
+ if (ip_vs_gather_frags(skb, ip_vs_defrag_user(hooknum)))
return NF_STOLEN;
}
pp->dont_defrag))
return NF_ACCEPT;
- IP_VS_DBG_PKT(11, pp, skb, offset, "Checking outgoing ICMP for");
+ IP_VS_DBG_PKT(11, AF_INET, pp, skb, offset,
+ "Checking outgoing ICMP for");
offset += cih->ihl * 4;
}
#ifdef CONFIG_IP_VS_IPV6
-static int ip_vs_out_icmp_v6(struct sk_buff *skb, int *related)
+static int ip_vs_out_icmp_v6(struct sk_buff *skb, int *related,
+ unsigned int hooknum)
{
struct ipv6hdr *iph;
struct icmp6hdr _icmph, *ic;
/* reassemble IP fragments */
if (ipv6_hdr(skb)->nexthdr == IPPROTO_FRAGMENT) {
- if (ip_vs_gather_frags_v6(skb, IP_DEFRAG_VS_OUT))
+ if (ip_vs_gather_frags_v6(skb, ip_vs_defrag_user(hooknum)))
return NF_STOLEN;
}
if (unlikely(cih->nexthdr == IPPROTO_FRAGMENT && pp->dont_defrag))
return NF_ACCEPT;
- IP_VS_DBG_PKT(11, pp, skb, offset, "Checking outgoing ICMPv6 for");
+ IP_VS_DBG_PKT(11, AF_INET6, pp, skb, offset,
+ "Checking outgoing ICMPv6 for");
offset += sizeof(struct ipv6hdr);
handle_response(int af, struct sk_buff *skb, struct ip_vs_protocol *pp,
struct ip_vs_conn *cp, int ihl)
{
- IP_VS_DBG_PKT(11, pp, skb, 0, "Outgoing packet");
+ IP_VS_DBG_PKT(11, af, pp, skb, 0, "Outgoing packet");
if (!skb_make_writable(skb, ihl))
goto drop;
ip_send_check(ip_hdr(skb));
}
+ /*
+ * nf_iterate does not expect change in the skb->dst->dev.
+ * It looks like it is not fatal to enable this code for hooks
+ * where our handlers are at the end of the chain list and
+ * when all next handlers use skb->dst->dev and not outdev.
+ * It will definitely route properly the inout NAT traffic
+ * when multiple paths are used.
+ */
+
/* For policy routing, packets originating from this
* machine itself may be routed differently to packets
* passing through. We want this packet to be routed as
*/
#ifdef CONFIG_IP_VS_IPV6
if (af == AF_INET6) {
- if (ip6_route_me_harder(skb) != 0)
+ if (sysctl_ip_vs_snat_reroute && ip6_route_me_harder(skb) != 0)
goto drop;
} else
#endif
- if (ip_route_me_harder(skb, RTN_LOCAL) != 0)
+ if ((sysctl_ip_vs_snat_reroute ||
+ skb_rtable(skb)->rt_flags & RTCF_LOCAL) &&
+ ip_route_me_harder(skb, RTN_LOCAL) != 0)
goto drop;
- IP_VS_DBG_PKT(10, pp, skb, 0, "After SNAT");
+ IP_VS_DBG_PKT(10, af, pp, skb, 0, "After SNAT");
ip_vs_out_stats(cp, skb);
ip_vs_set_state(cp, IP_VS_DIR_OUTPUT, skb, pp);
- ip_vs_update_conntrack(skb, cp, 0);
- ip_vs_conn_put(cp);
-
skb->ipvs_property = 1;
+ if (!(cp->flags & IP_VS_CONN_F_NFCT))
+ ip_vs_notrack(skb);
+ else
+ ip_vs_update_conntrack(skb, cp, 0);
+ ip_vs_conn_put(cp);
LeaveFunction(11);
return NF_ACCEPT;
drop:
ip_vs_conn_put(cp);
kfree_skb(skb);
+ LeaveFunction(11);
return NF_STOLEN;
}
/*
- * It is hooked at the NF_INET_FORWARD chain, used only for VS/NAT.
* Check if outgoing packet belongs to the established ip_vs_conn.
*/
static unsigned int
-ip_vs_out(unsigned int hooknum, struct sk_buff *skb,
- const struct net_device *in, const struct net_device *out,
- int (*okfn)(struct sk_buff *))
+ip_vs_out(unsigned int hooknum, struct sk_buff *skb, int af)
{
struct ip_vs_iphdr iph;
struct ip_vs_protocol *pp;
struct ip_vs_conn *cp;
- int af;
EnterFunction(11);
- af = (skb->protocol == htons(ETH_P_IP)) ? AF_INET : AF_INET6;
-
+ /* Already marked as IPVS request or reply? */
if (skb->ipvs_property)
return NF_ACCEPT;
+ /* Bad... Do not break raw sockets */
+ if (unlikely(skb->sk != NULL && hooknum == NF_INET_LOCAL_OUT &&
+ af == AF_INET)) {
+ struct sock *sk = skb->sk;
+ struct inet_sock *inet = inet_sk(skb->sk);
+
+ if (inet && sk->sk_family == PF_INET && inet->nodefrag)
+ return NF_ACCEPT;
+ }
+
+ if (unlikely(!skb_dst(skb)))
+ return NF_ACCEPT;
+
ip_vs_fill_iphdr(af, skb_network_header(skb), &iph);
#ifdef CONFIG_IP_VS_IPV6
if (af == AF_INET6) {
if (unlikely(iph.protocol == IPPROTO_ICMPV6)) {
- int related, verdict = ip_vs_out_icmp_v6(skb, &related);
+ int related;
+ int verdict = ip_vs_out_icmp_v6(skb, &related,
+ hooknum);
if (related)
return verdict;
} else
#endif
if (unlikely(iph.protocol == IPPROTO_ICMP)) {
- int related, verdict = ip_vs_out_icmp(skb, &related);
+ int related;
+ int verdict = ip_vs_out_icmp(skb, &related, hooknum);
if (related)
return verdict;
/* reassemble IP fragments */
#ifdef CONFIG_IP_VS_IPV6
if (af == AF_INET6) {
- if (unlikely(iph.protocol == IPPROTO_ICMPV6)) {
- int related, verdict = ip_vs_out_icmp_v6(skb, &related);
-
- if (related)
- return verdict;
-
- ip_vs_fill_iphdr(af, skb_network_header(skb), &iph);
+ if (ipv6_hdr(skb)->nexthdr == IPPROTO_FRAGMENT) {
+ if (ip_vs_gather_frags_v6(skb,
+ ip_vs_defrag_user(hooknum)))
+ return NF_STOLEN;
}
+
+ ip_vs_fill_iphdr(af, skb_network_header(skb), &iph);
} else
#endif
if (unlikely(ip_hdr(skb)->frag_off & htons(IP_MF|IP_OFFSET) &&
!pp->dont_defrag)) {
- if (ip_vs_gather_frags(skb, IP_DEFRAG_VS_OUT))
+ if (ip_vs_gather_frags(skb,
+ ip_vs_defrag_user(hooknum)))
return NF_STOLEN;
ip_vs_fill_iphdr(af, skb_network_header(skb), &iph);
*/
cp = pp->conn_out_get(af, skb, pp, &iph, iph.len, 0);
- if (unlikely(!cp)) {
- if (sysctl_ip_vs_nat_icmp_send &&
- (pp->protocol == IPPROTO_TCP ||
- pp->protocol == IPPROTO_UDP ||
- pp->protocol == IPPROTO_SCTP)) {
- __be16 _ports[2], *pptr;
-
- pptr = skb_header_pointer(skb, iph.len,
- sizeof(_ports), _ports);
- if (pptr == NULL)
- return NF_ACCEPT; /* Not for me */
- if (ip_vs_lookup_real_service(af, iph.protocol,
- &iph.saddr,
- pptr[0])) {
- /*
- * Notify the real server: there is no
- * existing entry if it is not RST
- * packet or not TCP packet.
- */
- if ((iph.protocol != IPPROTO_TCP &&
- iph.protocol != IPPROTO_SCTP)
- || ((iph.protocol == IPPROTO_TCP
- && !is_tcp_reset(skb, iph.len))
- || (iph.protocol == IPPROTO_SCTP
- && !is_sctp_abort(skb,
- iph.len)))) {
+ if (likely(cp))
+ return handle_response(af, skb, pp, cp, iph.len);
+ if (sysctl_ip_vs_nat_icmp_send &&
+ (pp->protocol == IPPROTO_TCP ||
+ pp->protocol == IPPROTO_UDP ||
+ pp->protocol == IPPROTO_SCTP)) {
+ __be16 _ports[2], *pptr;
+
+ pptr = skb_header_pointer(skb, iph.len,
+ sizeof(_ports), _ports);
+ if (pptr == NULL)
+ return NF_ACCEPT; /* Not for me */
+ if (ip_vs_lookup_real_service(af, iph.protocol,
+ &iph.saddr,
+ pptr[0])) {
+ /*
+ * Notify the real server: there is no
+ * existing entry if it is not RST
+ * packet or not TCP packet.
+ */
+ if ((iph.protocol != IPPROTO_TCP &&
+ iph.protocol != IPPROTO_SCTP)
+ || ((iph.protocol == IPPROTO_TCP
+ && !is_tcp_reset(skb, iph.len))
+ || (iph.protocol == IPPROTO_SCTP
+ && !is_sctp_abort(skb,
+ iph.len)))) {
#ifdef CONFIG_IP_VS_IPV6
- if (af == AF_INET6)
- icmpv6_send(skb,
- ICMPV6_DEST_UNREACH,
- ICMPV6_PORT_UNREACH,
- 0);
- else
+ if (af == AF_INET6) {
+ struct net *net =
+ dev_net(skb_dst(skb)->dev);
+
+ if (!skb->dev)
+ skb->dev = net->loopback_dev;
+ icmpv6_send(skb,
+ ICMPV6_DEST_UNREACH,
+ ICMPV6_PORT_UNREACH,
+ 0);
+ } else
#endif
- icmp_send(skb,
- ICMP_DEST_UNREACH,
- ICMP_PORT_UNREACH, 0);
- return NF_DROP;
- }
+ icmp_send(skb,
+ ICMP_DEST_UNREACH,
+ ICMP_PORT_UNREACH, 0);
+ return NF_DROP;
}
}
- IP_VS_DBG_PKT(12, pp, skb, 0,
- "packet continues traversal as normal");
- return NF_ACCEPT;
}
+ IP_VS_DBG_PKT(12, af, pp, skb, 0,
+ "ip_vs_out: packet continues traversal as normal");
+ return NF_ACCEPT;
+}
- return handle_response(af, skb, pp, cp, iph.len);
+/*
+ * It is hooked at the NF_INET_FORWARD and NF_INET_LOCAL_IN chain,
+ * used only for VS/NAT.
+ * Check if packet is reply for established ip_vs_conn.
+ */
+static unsigned int
+ip_vs_reply4(unsigned int hooknum, struct sk_buff *skb,
+ const struct net_device *in, const struct net_device *out,
+ int (*okfn)(struct sk_buff *))
+{
+ return ip_vs_out(hooknum, skb, AF_INET);
}
+/*
+ * It is hooked at the NF_INET_LOCAL_OUT chain, used only for VS/NAT.
+ * Check if packet is reply for established ip_vs_conn.
+ */
+static unsigned int
+ip_vs_local_reply4(unsigned int hooknum, struct sk_buff *skb,
+ const struct net_device *in, const struct net_device *out,
+ int (*okfn)(struct sk_buff *))
+{
+ unsigned int verdict;
+
+ /* Disable BH in LOCAL_OUT until all places are fixed */
+ local_bh_disable();
+ verdict = ip_vs_out(hooknum, skb, AF_INET);
+ local_bh_enable();
+ return verdict;
+}
+
+#ifdef CONFIG_IP_VS_IPV6
+
+/*
+ * It is hooked at the NF_INET_FORWARD and NF_INET_LOCAL_IN chain,
+ * used only for VS/NAT.
+ * Check if packet is reply for established ip_vs_conn.
+ */
+static unsigned int
+ip_vs_reply6(unsigned int hooknum, struct sk_buff *skb,
+ const struct net_device *in, const struct net_device *out,
+ int (*okfn)(struct sk_buff *))
+{
+ return ip_vs_out(hooknum, skb, AF_INET6);
+}
+
+/*
+ * It is hooked at the NF_INET_LOCAL_OUT chain, used only for VS/NAT.
+ * Check if packet is reply for established ip_vs_conn.
+ */
+static unsigned int
+ip_vs_local_reply6(unsigned int hooknum, struct sk_buff *skb,
+ const struct net_device *in, const struct net_device *out,
+ int (*okfn)(struct sk_buff *))
+{
+ unsigned int verdict;
+
+ /* Disable BH in LOCAL_OUT until all places are fixed */
+ local_bh_disable();
+ verdict = ip_vs_out(hooknum, skb, AF_INET6);
+ local_bh_enable();
+ return verdict;
+}
+
+#endif
/*
* Handle ICMP messages in the outside-to-inside direction (incoming).
/* reassemble IP fragments */
if (ip_hdr(skb)->frag_off & htons(IP_MF | IP_OFFSET)) {
- if (ip_vs_gather_frags(skb, hooknum == NF_INET_LOCAL_IN ?
- IP_DEFRAG_VS_IN : IP_DEFRAG_VS_FWD))
+ if (ip_vs_gather_frags(skb, ip_vs_defrag_user(hooknum)))
return NF_STOLEN;
}
pp->dont_defrag))
return NF_ACCEPT;
- IP_VS_DBG_PKT(11, pp, skb, offset, "Checking incoming ICMP for");
+ IP_VS_DBG_PKT(11, AF_INET, pp, skb, offset,
+ "Checking incoming ICMP for");
offset += cih->ihl * 4;
if (IPPROTO_TCP == cih->protocol || IPPROTO_UDP == cih->protocol)
offset += 2 * sizeof(__u16);
verdict = ip_vs_icmp_xmit(skb, cp, pp, offset);
- /* do not touch skb anymore */
+ /* LOCALNODE from FORWARD hook is not supported */
+ if (verdict == NF_ACCEPT && hooknum == NF_INET_FORWARD &&
+ skb_rtable(skb)->rt_flags & RTCF_LOCAL) {
+ IP_VS_DBG(1, "%s(): "
+ "local delivery to %pI4 but in FORWARD\n",
+ __func__, &skb_rtable(skb)->rt_dst);
+ verdict = NF_DROP;
+ }
out:
__ip_vs_conn_put(cp);
struct ip_vs_protocol *pp;
unsigned int offset, verdict;
union nf_inet_addr snet;
+ struct rt6_info *rt;
*related = 1;
/* reassemble IP fragments */
if (ipv6_hdr(skb)->nexthdr == IPPROTO_FRAGMENT) {
- if (ip_vs_gather_frags_v6(skb, hooknum == NF_INET_LOCAL_IN ?
- IP_DEFRAG_VS_IN :
- IP_DEFRAG_VS_FWD))
+ if (ip_vs_gather_frags_v6(skb, ip_vs_defrag_user(hooknum)))
return NF_STOLEN;
}
if (unlikely(cih->nexthdr == IPPROTO_FRAGMENT && pp->dont_defrag))
return NF_ACCEPT;
- IP_VS_DBG_PKT(11, pp, skb, offset, "Checking incoming ICMPv6 for");
+ IP_VS_DBG_PKT(11, AF_INET6, pp, skb, offset,
+ "Checking incoming ICMPv6 for");
offset += sizeof(struct ipv6hdr);
IPPROTO_SCTP == cih->nexthdr)
offset += 2 * sizeof(__u16);
verdict = ip_vs_icmp_xmit_v6(skb, cp, pp, offset);
- /* do not touch skb anymore */
+ /* LOCALNODE from FORWARD hook is not supported */
+ if (verdict == NF_ACCEPT && hooknum == NF_INET_FORWARD &&
+ (rt = (struct rt6_info *) skb_dst(skb)) &&
+ rt->rt6i_dev && rt->rt6i_dev->flags & IFF_LOOPBACK) {
+ IP_VS_DBG(1, "%s(): "
+ "local delivery to %pI6 but in FORWARD\n",
+ __func__, &rt->rt6i_dst);
+ verdict = NF_DROP;
+ }
__ip_vs_conn_put(cp);
* and send it on its way...
*/
static unsigned int
-ip_vs_in(unsigned int hooknum, struct sk_buff *skb,
- const struct net_device *in, const struct net_device *out,
- int (*okfn)(struct sk_buff *))
+ip_vs_in(unsigned int hooknum, struct sk_buff *skb, int af)
{
struct ip_vs_iphdr iph;
struct ip_vs_protocol *pp;
struct ip_vs_conn *cp;
- int ret, restart, af, pkts;
+ int ret, restart, pkts;
- af = (skb->protocol == htons(ETH_P_IP)) ? AF_INET : AF_INET6;
-
- ip_vs_fill_iphdr(af, skb_network_header(skb), &iph);
+ /* Already marked as IPVS request or reply? */
+ if (skb->ipvs_property)
+ return NF_ACCEPT;
/*
- * Big tappo: only PACKET_HOST, including loopback for local client
- * Don't handle local packets on IPv6 for now
+ * Big tappo:
+ * - remote client: only PACKET_HOST
+ * - route: used for struct net when skb->dev is unset
*/
- if (unlikely(skb->pkt_type != PACKET_HOST)) {
- IP_VS_DBG_BUF(12, "packet type=%d proto=%d daddr=%s ignored\n",
- skb->pkt_type,
- iph.protocol,
- IP_VS_DBG_ADDR(af, &iph.daddr));
+ if (unlikely((skb->pkt_type != PACKET_HOST &&
+ hooknum != NF_INET_LOCAL_OUT) ||
+ !skb_dst(skb))) {
+ ip_vs_fill_iphdr(af, skb_network_header(skb), &iph);
+ IP_VS_DBG_BUF(12, "packet type=%d proto=%d daddr=%s"
+ " ignored in hook %u\n",
+ skb->pkt_type, iph.protocol,
+ IP_VS_DBG_ADDR(af, &iph.daddr), hooknum);
return NF_ACCEPT;
}
+ ip_vs_fill_iphdr(af, skb_network_header(skb), &iph);
+
+ /* Bad... Do not break raw sockets */
+ if (unlikely(skb->sk != NULL && hooknum == NF_INET_LOCAL_OUT &&
+ af == AF_INET)) {
+ struct sock *sk = skb->sk;
+ struct inet_sock *inet = inet_sk(skb->sk);
+
+ if (inet && sk->sk_family == PF_INET && inet->nodefrag)
+ return NF_ACCEPT;
+ }
#ifdef CONFIG_IP_VS_IPV6
if (af == AF_INET6) {
if (unlikely(iph.protocol == IPPROTO_ICMPV6)) {
- int related, verdict = ip_vs_in_icmp_v6(skb, &related, hooknum);
+ int related;
+ int verdict = ip_vs_in_icmp_v6(skb, &related, hooknum);
if (related)
return verdict;
} else
#endif
if (unlikely(iph.protocol == IPPROTO_ICMP)) {
- int related, verdict = ip_vs_in_icmp(skb, &related, hooknum);
+ int related;
+ int verdict = ip_vs_in_icmp(skb, &related, hooknum);
if (related)
return verdict;
if (unlikely(!cp)) {
int v;
- /* For local client packets, it could be a response */
- cp = pp->conn_out_get(af, skb, pp, &iph, iph.len, 0);
- if (cp)
- return handle_response(af, skb, pp, cp, iph.len);
-
if (!pp->conn_schedule(af, skb, pp, &v, &cp))
return v;
}
if (unlikely(!cp)) {
/* sorry, all this trouble for a no-hit :) */
- IP_VS_DBG_PKT(12, pp, skb, 0,
- "packet continues traversal as normal");
+ IP_VS_DBG_PKT(12, af, pp, skb, 0,
+ "ip_vs_in: packet continues traversal as normal");
return NF_ACCEPT;
}
- IP_VS_DBG_PKT(11, pp, skb, 0, "Incoming packet");
+ IP_VS_DBG_PKT(11, af, pp, skb, 0, "Incoming packet");
/* Check the server status */
if (cp->dest && !(cp->dest->flags & IP_VS_DEST_F_AVAILABLE)) {
return ret;
}
+/*
+ * AF_INET handler in NF_INET_LOCAL_IN chain
+ * Schedule and forward packets from remote clients
+ */
+static unsigned int
+ip_vs_remote_request4(unsigned int hooknum, struct sk_buff *skb,
+ const struct net_device *in,
+ const struct net_device *out,
+ int (*okfn)(struct sk_buff *))
+{
+ return ip_vs_in(hooknum, skb, AF_INET);
+}
+
+/*
+ * AF_INET handler in NF_INET_LOCAL_OUT chain
+ * Schedule and forward packets from local clients
+ */
+static unsigned int
+ip_vs_local_request4(unsigned int hooknum, struct sk_buff *skb,
+ const struct net_device *in, const struct net_device *out,
+ int (*okfn)(struct sk_buff *))
+{
+ unsigned int verdict;
+
+ /* Disable BH in LOCAL_OUT until all places are fixed */
+ local_bh_disable();
+ verdict = ip_vs_in(hooknum, skb, AF_INET);
+ local_bh_enable();
+ return verdict;
+}
+
+#ifdef CONFIG_IP_VS_IPV6
+
+/*
+ * AF_INET6 handler in NF_INET_LOCAL_IN chain
+ * Schedule and forward packets from remote clients
+ */
+static unsigned int
+ip_vs_remote_request6(unsigned int hooknum, struct sk_buff *skb,
+ const struct net_device *in,
+ const struct net_device *out,
+ int (*okfn)(struct sk_buff *))
+{
+ return ip_vs_in(hooknum, skb, AF_INET6);
+}
+
+/*
+ * AF_INET6 handler in NF_INET_LOCAL_OUT chain
+ * Schedule and forward packets from local clients
+ */
+static unsigned int
+ip_vs_local_request6(unsigned int hooknum, struct sk_buff *skb,
+ const struct net_device *in, const struct net_device *out,
+ int (*okfn)(struct sk_buff *))
+{
+ unsigned int verdict;
+
+ /* Disable BH in LOCAL_OUT until all places are fixed */
+ local_bh_disable();
+ verdict = ip_vs_in(hooknum, skb, AF_INET6);
+ local_bh_enable();
+ return verdict;
+}
+
+#endif
+
/*
* It is hooked at the NF_INET_FORWARD chain, in order to catch ICMP
static struct nf_hook_ops ip_vs_ops[] __read_mostly = {
+ /* After packet filtering, change source only for VS/NAT */
+ {
+ .hook = ip_vs_reply4,
+ .owner = THIS_MODULE,
+ .pf = PF_INET,
+ .hooknum = NF_INET_LOCAL_IN,
+ .priority = 99,
+ },
/* After packet filtering, forward packet through VS/DR, VS/TUN,
* or VS/NAT(change destination), so that filtering rules can be
* applied to IPVS. */
{
- .hook = ip_vs_in,
+ .hook = ip_vs_remote_request4,
.owner = THIS_MODULE,
.pf = PF_INET,
- .hooknum = NF_INET_LOCAL_IN,
- .priority = 100,
+ .hooknum = NF_INET_LOCAL_IN,
+ .priority = 101,
},
- /* After packet filtering, change source only for VS/NAT */
+ /* Before ip_vs_in, change source only for VS/NAT */
{
- .hook = ip_vs_out,
+ .hook = ip_vs_local_reply4,
.owner = THIS_MODULE,
.pf = PF_INET,
- .hooknum = NF_INET_FORWARD,
- .priority = 100,
+ .hooknum = NF_INET_LOCAL_OUT,
+ .priority = -99,
+ },
+ /* After mangle, schedule and forward local requests */
+ {
+ .hook = ip_vs_local_request4,
+ .owner = THIS_MODULE,
+ .pf = PF_INET,
+ .hooknum = NF_INET_LOCAL_OUT,
+ .priority = -98,
},
/* After packet filtering (but before ip_vs_out_icmp), catch icmp
* destined for 0.0.0.0/0, which is for incoming IPVS connections */
.hook = ip_vs_forward_icmp,
.owner = THIS_MODULE,
.pf = PF_INET,
- .hooknum = NF_INET_FORWARD,
- .priority = 99,
+ .hooknum = NF_INET_FORWARD,
+ .priority = 99,
+ },
+ /* After packet filtering, change source only for VS/NAT */
+ {
+ .hook = ip_vs_reply4,
+ .owner = THIS_MODULE,
+ .pf = PF_INET,
+ .hooknum = NF_INET_FORWARD,
+ .priority = 100,
},
#ifdef CONFIG_IP_VS_IPV6
+ /* After packet filtering, change source only for VS/NAT */
+ {
+ .hook = ip_vs_reply6,
+ .owner = THIS_MODULE,
+ .pf = PF_INET6,
+ .hooknum = NF_INET_LOCAL_IN,
+ .priority = 99,
+ },
/* After packet filtering, forward packet through VS/DR, VS/TUN,
* or VS/NAT(change destination), so that filtering rules can be
* applied to IPVS. */
{
- .hook = ip_vs_in,
+ .hook = ip_vs_remote_request6,
.owner = THIS_MODULE,
.pf = PF_INET6,
- .hooknum = NF_INET_LOCAL_IN,
- .priority = 100,
+ .hooknum = NF_INET_LOCAL_IN,
+ .priority = 101,
},
- /* After packet filtering, change source only for VS/NAT */
+ /* Before ip_vs_in, change source only for VS/NAT */
+ {
+ .hook = ip_vs_local_reply6,
+ .owner = THIS_MODULE,
+ .pf = PF_INET,
+ .hooknum = NF_INET_LOCAL_OUT,
+ .priority = -99,
+ },
+ /* After mangle, schedule and forward local requests */
{
- .hook = ip_vs_out,
+ .hook = ip_vs_local_request6,
.owner = THIS_MODULE,
.pf = PF_INET6,
- .hooknum = NF_INET_FORWARD,
- .priority = 100,
+ .hooknum = NF_INET_LOCAL_OUT,
+ .priority = -98,
},
/* After packet filtering (but before ip_vs_out_icmp), catch icmp
* destined for 0.0.0.0/0, which is for incoming IPVS connections */
.hook = ip_vs_forward_icmp_v6,
.owner = THIS_MODULE,
.pf = PF_INET6,
- .hooknum = NF_INET_FORWARD,
- .priority = 99,
+ .hooknum = NF_INET_FORWARD,
+ .priority = 99,
+ },
+ /* After packet filtering, change source only for VS/NAT */
+ {
+ .hook = ip_vs_reply6,
+ .owner = THIS_MODULE,
+ .pf = PF_INET6,
+ .hooknum = NF_INET_FORWARD,
+ .priority = 100,
},
#endif
};
int sysctl_ip_vs_expire_quiescent_template = 0;
int sysctl_ip_vs_sync_threshold[2] = { 3, 50 };
int sysctl_ip_vs_nat_icmp_send = 0;
+#ifdef CONFIG_IP_VS_NFCT
+int sysctl_ip_vs_conntrack;
+#endif
+int sysctl_ip_vs_snat_reroute = 1;
#ifdef CONFIG_IP_VS_DEBUG
* Get service by {proto,addr,port} in the service table.
*/
static inline struct ip_vs_service *
-__ip_vs_service_get(int af, __u16 protocol, const union nf_inet_addr *vaddr,
+__ip_vs_service_find(int af, __u16 protocol, const union nf_inet_addr *vaddr,
__be16 vport)
{
unsigned hash;
&& (svc->port == vport)
&& (svc->protocol == protocol)) {
/* HIT */
- atomic_inc(&svc->usecnt);
return svc;
}
}
* Get service by {fwmark} in the service table.
*/
static inline struct ip_vs_service *
-__ip_vs_svc_fwm_get(int af, __u32 fwmark)
+__ip_vs_svc_fwm_find(int af, __u32 fwmark)
{
unsigned hash;
struct ip_vs_service *svc;
list_for_each_entry(svc, &ip_vs_svc_fwm_table[hash], f_list) {
if (svc->fwmark == fwmark && svc->af == af) {
/* HIT */
- atomic_inc(&svc->usecnt);
return svc;
}
}
/*
* Check the table hashed by fwmark first
*/
- if (fwmark && (svc = __ip_vs_svc_fwm_get(af, fwmark)))
+ if (fwmark && (svc = __ip_vs_svc_fwm_find(af, fwmark)))
goto out;
/*
* Check the table hashed by <protocol,addr,port>
* for "full" addressed entries
*/
- svc = __ip_vs_service_get(af, protocol, vaddr, vport);
+ svc = __ip_vs_service_find(af, protocol, vaddr, vport);
if (svc == NULL
&& protocol == IPPROTO_TCP
* Check if ftp service entry exists, the packet
* might belong to FTP data connections.
*/
- svc = __ip_vs_service_get(af, protocol, vaddr, FTPPORT);
+ svc = __ip_vs_service_find(af, protocol, vaddr, FTPPORT);
}
if (svc == NULL
/*
* Check if the catch-all port (port zero) exists
*/
- svc = __ip_vs_service_get(af, protocol, vaddr, 0);
+ svc = __ip_vs_service_find(af, protocol, vaddr, 0);
}
out:
+ if (svc)
+ atomic_inc(&svc->usecnt);
read_unlock(&__ip_vs_svc_lock);
IP_VS_DBG_BUF(9, "lookup service: fwm %u %s %s:%u %s\n",
dest->svc = svc;
}
-static inline void
+static void
__ip_vs_unbind_svc(struct ip_vs_dest *dest)
{
struct ip_vs_service *svc = dest->svc;
dest->svc = NULL;
- if (atomic_dec_and_test(&svc->refcnt))
+ if (atomic_dec_and_test(&svc->refcnt)) {
+ IP_VS_DBG_BUF(3, "Removing service %u/%s:%u usecnt=%d\n",
+ svc->fwmark,
+ IP_VS_DBG_ADDR(svc->af, &svc->addr),
+ ntohs(svc->port), atomic_read(&svc->usecnt));
kfree(svc);
+ }
}
* Update a destination in the given service
*/
static void
-__ip_vs_update_dest(struct ip_vs_service *svc,
- struct ip_vs_dest *dest, struct ip_vs_dest_user_kern *udest)
+__ip_vs_update_dest(struct ip_vs_service *svc, struct ip_vs_dest *dest,
+ struct ip_vs_dest_user_kern *udest, int add)
{
int conn_flags;
/* set the weight and the flags */
atomic_set(&dest->weight, udest->weight);
- conn_flags = udest->conn_flags | IP_VS_CONN_F_INACTIVE;
-
- /* check if local node and update the flags */
-#ifdef CONFIG_IP_VS_IPV6
- if (svc->af == AF_INET6) {
- if (__ip_vs_addr_is_local_v6(&udest->addr.in6)) {
- conn_flags = (conn_flags & ~IP_VS_CONN_F_FWD_MASK)
- | IP_VS_CONN_F_LOCALNODE;
- }
- } else
-#endif
- if (inet_addr_type(&init_net, udest->addr.ip) == RTN_LOCAL) {
- conn_flags = (conn_flags & ~IP_VS_CONN_F_FWD_MASK)
- | IP_VS_CONN_F_LOCALNODE;
- }
+ conn_flags = udest->conn_flags & IP_VS_CONN_F_DEST_MASK;
+ conn_flags |= IP_VS_CONN_F_INACTIVE;
/* set the IP_VS_CONN_F_NOOUTPUT flag if not masquerading/NAT */
- if ((conn_flags & IP_VS_CONN_F_FWD_MASK) != 0) {
+ if ((conn_flags & IP_VS_CONN_F_FWD_MASK) != IP_VS_CONN_F_MASQ) {
conn_flags |= IP_VS_CONN_F_NOOUTPUT;
} else {
/*
dest->flags &= ~IP_VS_DEST_F_OVERLOAD;
dest->u_threshold = udest->u_threshold;
dest->l_threshold = udest->l_threshold;
+
+ spin_lock(&dest->dst_lock);
+ ip_vs_dst_reset(dest);
+ spin_unlock(&dest->dst_lock);
+
+ if (add)
+ ip_vs_new_estimator(&dest->stats);
+
+ write_lock_bh(&__ip_vs_svc_lock);
+
+ /* Wait until all other svc users go away */
+ IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 0);
+
+ if (add) {
+ list_add(&dest->n_list, &svc->destinations);
+ svc->num_dests++;
+ }
+
+ /* call the update_service, because server weight may be changed */
+ if (svc->scheduler->update_service)
+ svc->scheduler->update_service(svc);
+
+ write_unlock_bh(&__ip_vs_svc_lock);
}
atomic_set(&dest->activeconns, 0);
atomic_set(&dest->inactconns, 0);
atomic_set(&dest->persistconns, 0);
- atomic_set(&dest->refcnt, 0);
+ atomic_set(&dest->refcnt, 1);
INIT_LIST_HEAD(&dest->d_list);
spin_lock_init(&dest->dst_lock);
spin_lock_init(&dest->stats.lock);
- __ip_vs_update_dest(svc, dest, udest);
- ip_vs_new_estimator(&dest->stats);
+ __ip_vs_update_dest(svc, dest, udest, 1);
*dest_p = dest;
IP_VS_DBG_ADDR(svc->af, &dest->vaddr),
ntohs(dest->vport));
- __ip_vs_update_dest(svc, dest, udest);
-
/*
* Get the destination from the trash
*/
list_del(&dest->n_list);
- ip_vs_new_estimator(&dest->stats);
-
- write_lock_bh(&__ip_vs_svc_lock);
-
+ __ip_vs_update_dest(svc, dest, udest, 1);
+ ret = 0;
+ } else {
/*
- * Wait until all other svc users go away.
+ * Allocate and initialize the dest structure
*/
- IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 1);
-
- list_add(&dest->n_list, &svc->destinations);
- svc->num_dests++;
-
- /* call the update_service function of its scheduler */
- if (svc->scheduler->update_service)
- svc->scheduler->update_service(svc);
-
- write_unlock_bh(&__ip_vs_svc_lock);
- return 0;
- }
-
- /*
- * Allocate and initialize the dest structure
- */
- ret = ip_vs_new_dest(svc, udest, &dest);
- if (ret) {
- return ret;
+ ret = ip_vs_new_dest(svc, udest, &dest);
}
-
- /*
- * Add the dest entry into the list
- */
- atomic_inc(&dest->refcnt);
-
- write_lock_bh(&__ip_vs_svc_lock);
-
- /*
- * Wait until all other svc users go away.
- */
- IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 1);
-
- list_add(&dest->n_list, &svc->destinations);
- svc->num_dests++;
-
- /* call the update_service function of its scheduler */
- if (svc->scheduler->update_service)
- svc->scheduler->update_service(svc);
-
- write_unlock_bh(&__ip_vs_svc_lock);
-
LeaveFunction(2);
- return 0;
+ return ret;
}
return -ENOENT;
}
- __ip_vs_update_dest(svc, dest, udest);
-
- write_lock_bh(&__ip_vs_svc_lock);
-
- /* Wait until all other svc users go away */
- IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 1);
-
- /* call the update_service, because server weight may be changed */
- if (svc->scheduler->update_service)
- svc->scheduler->update_service(svc);
-
- write_unlock_bh(&__ip_vs_svc_lock);
-
+ __ip_vs_update_dest(svc, dest, udest, 0);
LeaveFunction(2);
return 0;
* the destination into the trash.
*/
if (atomic_dec_and_test(&dest->refcnt)) {
+ IP_VS_DBG_BUF(3, "Removing destination %u/%s:%u\n",
+ dest->vfwmark,
+ IP_VS_DBG_ADDR(dest->af, &dest->addr),
+ ntohs(dest->port));
ip_vs_dst_reset(dest);
/* simply decrease svc->refcnt here, let the caller check
and release the service if nobody refers to it.
/*
* Wait until all other svc users go away.
*/
- IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 1);
+ IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 0);
/*
* Unlink dest from the service
{
int ret = 0;
struct ip_vs_scheduler *sched = NULL;
+ struct ip_vs_pe *pe = NULL;
struct ip_vs_service *svc = NULL;
/* increase the module use count */
if (sched == NULL) {
pr_info("Scheduler module ip_vs_%s not found\n", u->sched_name);
ret = -ENOENT;
- goto out_mod_dec;
+ goto out_err;
+ }
+
+ if (u->pe_name && *u->pe_name) {
+ pe = ip_vs_pe_get(u->pe_name);
+ if (pe == NULL) {
+ pr_info("persistence engine module ip_vs_pe_%s "
+ "not found\n", u->pe_name);
+ ret = -ENOENT;
+ goto out_err;
+ }
}
#ifdef CONFIG_IP_VS_IPV6
}
/* I'm the first user of the service */
- atomic_set(&svc->usecnt, 1);
+ atomic_set(&svc->usecnt, 0);
atomic_set(&svc->refcnt, 0);
svc->af = u->af;
goto out_err;
sched = NULL;
+ /* Bind the ct retriever */
+ ip_vs_bind_pe(svc, pe);
+ pe = NULL;
+
/* Update the virtual service counters */
if (svc->port == FTPPORT)
atomic_inc(&ip_vs_ftpsvc_counter);
*svc_p = svc;
return 0;
- out_err:
+ out_err:
if (svc != NULL) {
- if (svc->scheduler)
- ip_vs_unbind_scheduler(svc);
+ ip_vs_unbind_scheduler(svc);
if (svc->inc) {
local_bh_disable();
ip_vs_app_inc_put(svc->inc);
kfree(svc);
}
ip_vs_scheduler_put(sched);
+ ip_vs_pe_put(pe);
- out_mod_dec:
/* decrease the module use count */
ip_vs_use_count_dec();
ip_vs_edit_service(struct ip_vs_service *svc, struct ip_vs_service_user_kern *u)
{
struct ip_vs_scheduler *sched, *old_sched;
+ struct ip_vs_pe *pe = NULL, *old_pe = NULL;
int ret = 0;
/*
}
old_sched = sched;
+ if (u->pe_name && *u->pe_name) {
+ pe = ip_vs_pe_get(u->pe_name);
+ if (pe == NULL) {
+ pr_info("persistence engine module ip_vs_pe_%s "
+ "not found\n", u->pe_name);
+ ret = -ENOENT;
+ goto out;
+ }
+ old_pe = pe;
+ }
+
#ifdef CONFIG_IP_VS_IPV6
if (u->af == AF_INET6 && (u->netmask < 1 || u->netmask > 128)) {
ret = -EINVAL;
/*
* Wait until all other svc users go away.
*/
- IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 1);
+ IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 0);
/*
* Set the flags and timeout value
}
}
+ old_pe = svc->pe;
+ if (pe != old_pe) {
+ ip_vs_unbind_pe(svc);
+ ip_vs_bind_pe(svc, pe);
+ }
+
out_unlock:
write_unlock_bh(&__ip_vs_svc_lock);
-#ifdef CONFIG_IP_VS_IPV6
out:
-#endif
-
- if (old_sched)
- ip_vs_scheduler_put(old_sched);
-
+ ip_vs_scheduler_put(old_sched);
+ ip_vs_pe_put(old_pe);
return ret;
}
{
struct ip_vs_dest *dest, *nxt;
struct ip_vs_scheduler *old_sched;
+ struct ip_vs_pe *old_pe;
+
+ pr_info("%s: enter\n", __func__);
/* Count only IPv4 services for old get/setsockopt interface */
if (svc->af == AF_INET)
/* Unbind scheduler */
old_sched = svc->scheduler;
ip_vs_unbind_scheduler(svc);
- if (old_sched)
- ip_vs_scheduler_put(old_sched);
+ ip_vs_scheduler_put(old_sched);
+
+ /* Unbind persistence engine */
+ old_pe = svc->pe;
+ ip_vs_unbind_pe(svc);
+ ip_vs_pe_put(old_pe);
/* Unbind app inc */
if (svc->inc) {
/*
* Free the service if nobody refers to it
*/
- if (atomic_read(&svc->refcnt) == 0)
+ if (atomic_read(&svc->refcnt) == 0) {
+ IP_VS_DBG_BUF(3, "Removing service %u/%s:%u usecnt=%d\n",
+ svc->fwmark,
+ IP_VS_DBG_ADDR(svc->af, &svc->addr),
+ ntohs(svc->port), atomic_read(&svc->usecnt));
kfree(svc);
+ }
/* decrease the module use count */
ip_vs_use_count_dec();
}
/*
- * Delete a service from the service list
+ * Unlink a service from list and try to delete it if its refcnt reached 0
*/
-static int ip_vs_del_service(struct ip_vs_service *svc)
+static void ip_vs_unlink_service(struct ip_vs_service *svc)
{
- if (svc == NULL)
- return -EEXIST;
-
/*
* Unhash it from the service table
*/
/*
* Wait until all the svc users go away.
*/
- IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 1);
+ IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 0);
__ip_vs_del_service(svc);
write_unlock_bh(&__ip_vs_svc_lock);
+}
+
+/*
+ * Delete a service from the service list
+ */
+static int ip_vs_del_service(struct ip_vs_service *svc)
+{
+ if (svc == NULL)
+ return -EEXIST;
+ ip_vs_unlink_service(svc);
return 0;
}
*/
for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
list_for_each_entry_safe(svc, nxt, &ip_vs_svc_table[idx], s_list) {
- write_lock_bh(&__ip_vs_svc_lock);
- ip_vs_svc_unhash(svc);
- /*
- * Wait until all the svc users go away.
- */
- IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 0);
- __ip_vs_del_service(svc);
- write_unlock_bh(&__ip_vs_svc_lock);
+ ip_vs_unlink_service(svc);
}
}
for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
list_for_each_entry_safe(svc, nxt,
&ip_vs_svc_fwm_table[idx], f_list) {
- write_lock_bh(&__ip_vs_svc_lock);
- ip_vs_svc_unhash(svc);
- /*
- * Wait until all the svc users go away.
- */
- IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 0);
- __ip_vs_del_service(svc);
- write_unlock_bh(&__ip_vs_svc_lock);
+ ip_vs_unlink_service(svc);
}
}
.mode = 0644,
.proc_handler = proc_do_defense_mode,
},
+#ifdef CONFIG_IP_VS_NFCT
+ {
+ .procname = "conntrack",
+ .data = &sysctl_ip_vs_conntrack,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ },
+#endif
{
.procname = "secure_tcp",
.data = &sysctl_ip_vs_secure_tcp,
.mode = 0644,
.proc_handler = proc_do_defense_mode,
},
+ {
+ .procname = "snat_reroute",
+ .data = &sysctl_ip_vs_snat_reroute,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ },
#if 0
{
.procname = "timeout_established",
static void ip_vs_copy_usvc_compat(struct ip_vs_service_user_kern *usvc,
struct ip_vs_service_user *usvc_compat)
{
+ memset(usvc, 0, sizeof(*usvc));
+
usvc->af = AF_INET;
usvc->protocol = usvc_compat->protocol;
usvc->addr.ip = usvc_compat->addr;
static void ip_vs_copy_udest_compat(struct ip_vs_dest_user_kern *udest,
struct ip_vs_dest_user *udest_compat)
{
+ memset(udest, 0, sizeof(*udest));
+
udest->addr.ip = udest_compat->addr;
udest->port = udest_compat->port;
udest->conn_flags = udest_compat->conn_flags;
/* Lookup the exact service by <protocol, addr, port> or fwmark */
if (usvc.fwmark == 0)
- svc = __ip_vs_service_get(usvc.af, usvc.protocol,
- &usvc.addr, usvc.port);
+ svc = __ip_vs_service_find(usvc.af, usvc.protocol,
+ &usvc.addr, usvc.port);
else
- svc = __ip_vs_svc_fwm_get(usvc.af, usvc.fwmark);
+ svc = __ip_vs_svc_fwm_find(usvc.af, usvc.fwmark);
if (cmd != IP_VS_SO_SET_ADD
&& (svc == NULL || svc->protocol != usvc.protocol)) {
ret = -ESRCH;
- goto out_drop_service;
+ goto out_unlock;
}
switch (cmd) {
ret = -EINVAL;
}
-out_drop_service:
- if (svc)
- ip_vs_service_put(svc);
-
out_unlock:
mutex_unlock(&__ip_vs_mutex);
out_dec:
int ret = 0;
if (get->fwmark)
- svc = __ip_vs_svc_fwm_get(AF_INET, get->fwmark);
+ svc = __ip_vs_svc_fwm_find(AF_INET, get->fwmark);
else
- svc = __ip_vs_service_get(AF_INET, get->protocol, &addr,
- get->port);
+ svc = __ip_vs_service_find(AF_INET, get->protocol, &addr,
+ get->port);
if (svc) {
int count = 0;
}
count++;
}
- ip_vs_service_put(svc);
} else
ret = -ESRCH;
return ret;
entry = (struct ip_vs_service_entry *)arg;
addr.ip = entry->addr;
if (entry->fwmark)
- svc = __ip_vs_svc_fwm_get(AF_INET, entry->fwmark);
+ svc = __ip_vs_svc_fwm_find(AF_INET, entry->fwmark);
else
- svc = __ip_vs_service_get(AF_INET, entry->protocol,
- &addr, entry->port);
+ svc = __ip_vs_service_find(AF_INET, entry->protocol,
+ &addr, entry->port);
if (svc) {
ip_vs_copy_service(entry, svc);
if (copy_to_user(user, entry, sizeof(*entry)) != 0)
ret = -EFAULT;
- ip_vs_service_put(svc);
} else
ret = -ESRCH;
}
[IPVS_SVC_ATTR_FWMARK] = { .type = NLA_U32 },
[IPVS_SVC_ATTR_SCHED_NAME] = { .type = NLA_NUL_STRING,
.len = IP_VS_SCHEDNAME_MAXLEN },
+ [IPVS_SVC_ATTR_PE_NAME] = { .type = NLA_NUL_STRING,
+ .len = IP_VS_PENAME_MAXLEN },
[IPVS_SVC_ATTR_FLAGS] = { .type = NLA_BINARY,
.len = sizeof(struct ip_vs_flags) },
[IPVS_SVC_ATTR_TIMEOUT] = { .type = NLA_U32 },
}
NLA_PUT_STRING(skb, IPVS_SVC_ATTR_SCHED_NAME, svc->scheduler->name);
+ if (svc->pe)
+ NLA_PUT_STRING(skb, IPVS_SVC_ATTR_PE_NAME, svc->pe->name);
NLA_PUT(skb, IPVS_SVC_ATTR_FLAGS, sizeof(flags), &flags);
NLA_PUT_U32(skb, IPVS_SVC_ATTR_TIMEOUT, svc->timeout / HZ);
NLA_PUT_U32(skb, IPVS_SVC_ATTR_NETMASK, svc->netmask);
}
static int ip_vs_genl_parse_service(struct ip_vs_service_user_kern *usvc,
- struct nlattr *nla, int full_entry)
+ struct nlattr *nla, int full_entry,
+ struct ip_vs_service **ret_svc)
{
struct nlattr *attrs[IPVS_SVC_ATTR_MAX + 1];
struct nlattr *nla_af, *nla_port, *nla_fwmark, *nla_protocol, *nla_addr;
+ struct ip_vs_service *svc;
/* Parse mandatory identifying service fields first */
if (nla == NULL ||
usvc->fwmark = 0;
}
+ if (usvc->fwmark)
+ svc = __ip_vs_svc_fwm_find(usvc->af, usvc->fwmark);
+ else
+ svc = __ip_vs_service_find(usvc->af, usvc->protocol,
+ &usvc->addr, usvc->port);
+ *ret_svc = svc;
+
/* If a full entry was requested, check for the additional fields */
if (full_entry) {
- struct nlattr *nla_sched, *nla_flags, *nla_timeout,
+ struct nlattr *nla_sched, *nla_flags, *nla_pe, *nla_timeout,
*nla_netmask;
struct ip_vs_flags flags;
- struct ip_vs_service *svc;
nla_sched = attrs[IPVS_SVC_ATTR_SCHED_NAME];
+ nla_pe = attrs[IPVS_SVC_ATTR_PE_NAME];
nla_flags = attrs[IPVS_SVC_ATTR_FLAGS];
nla_timeout = attrs[IPVS_SVC_ATTR_TIMEOUT];
nla_netmask = attrs[IPVS_SVC_ATTR_NETMASK];
nla_memcpy(&flags, nla_flags, sizeof(flags));
/* prefill flags from service if it already exists */
- if (usvc->fwmark)
- svc = __ip_vs_svc_fwm_get(usvc->af, usvc->fwmark);
- else
- svc = __ip_vs_service_get(usvc->af, usvc->protocol,
- &usvc->addr, usvc->port);
- if (svc) {
+ if (svc)
usvc->flags = svc->flags;
- ip_vs_service_put(svc);
- } else
- usvc->flags = 0;
/* set new flags from userland */
usvc->flags = (usvc->flags & ~flags.mask) |
(flags.flags & flags.mask);
usvc->sched_name = nla_data(nla_sched);
+ usvc->pe_name = nla_pe ? nla_data(nla_pe) : NULL;
usvc->timeout = nla_get_u32(nla_timeout);
usvc->netmask = nla_get_u32(nla_netmask);
}
static struct ip_vs_service *ip_vs_genl_find_service(struct nlattr *nla)
{
struct ip_vs_service_user_kern usvc;
+ struct ip_vs_service *svc;
int ret;
- ret = ip_vs_genl_parse_service(&usvc, nla, 0);
- if (ret)
- return ERR_PTR(ret);
-
- if (usvc.fwmark)
- return __ip_vs_svc_fwm_get(usvc.af, usvc.fwmark);
- else
- return __ip_vs_service_get(usvc.af, usvc.protocol,
- &usvc.addr, usvc.port);
+ ret = ip_vs_genl_parse_service(&usvc, nla, 0, &svc);
+ return ret ? ERR_PTR(ret) : svc;
}
static int ip_vs_genl_fill_dest(struct sk_buff *skb, struct ip_vs_dest *dest)
nla_put_failure:
cb->args[0] = idx;
- ip_vs_service_put(svc);
out_err:
mutex_unlock(&__ip_vs_mutex);
ret = ip_vs_genl_parse_service(&usvc,
info->attrs[IPVS_CMD_ATTR_SERVICE],
- need_full_svc);
+ need_full_svc, &svc);
if (ret)
goto out;
- /* Lookup the exact service by <protocol, addr, port> or fwmark */
- if (usvc.fwmark == 0)
- svc = __ip_vs_service_get(usvc.af, usvc.protocol,
- &usvc.addr, usvc.port);
- else
- svc = __ip_vs_svc_fwm_get(usvc.af, usvc.fwmark);
-
/* Unless we're adding a new service, the service must already exist */
if ((cmd != IPVS_CMD_NEW_SERVICE) && (svc == NULL)) {
ret = -ESRCH;
break;
case IPVS_CMD_DEL_SERVICE:
ret = ip_vs_del_service(svc);
+ /* do not use svc, it can be freed */
break;
case IPVS_CMD_NEW_DEST:
ret = ip_vs_add_dest(svc, &udest);
}
out:
- if (svc)
- ip_vs_service_put(svc);
mutex_unlock(&__ip_vs_mutex);
return ret;
goto out_err;
} else if (svc) {
ret = ip_vs_genl_fill_service(msg, svc);
- ip_vs_service_put(svc);
if (ret)
goto nla_put_failure;
} else {
EnterFunction(2);
+ /* Initialize ip_vs_svc_table, ip_vs_svc_fwm_table, ip_vs_rtable */
+ for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
+ INIT_LIST_HEAD(&ip_vs_svc_table[idx]);
+ INIT_LIST_HEAD(&ip_vs_svc_fwm_table[idx]);
+ }
+ for(idx = 0; idx < IP_VS_RTAB_SIZE; idx++) {
+ INIT_LIST_HEAD(&ip_vs_rtable[idx]);
+ }
+ smp_wmb();
+
ret = nf_register_sockopt(&ip_vs_sockopts);
if (ret) {
pr_err("cannot register sockopt.\n");
sysctl_header = register_sysctl_paths(net_vs_ctl_path, vs_vars);
- /* Initialize ip_vs_svc_table, ip_vs_svc_fwm_table, ip_vs_rtable */
- for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
- INIT_LIST_HEAD(&ip_vs_svc_table[idx]);
- INIT_LIST_HEAD(&ip_vs_svc_fwm_table[idx]);
- }
- for(idx = 0; idx < IP_VS_RTAB_SIZE; idx++) {
- INIT_LIST_HEAD(&ip_vs_rtable[idx]);
- }
-
ip_vs_new_estimator(&ip_vs_stats);
/* Hook the defense timer */
*
* Author: Wouter Gadeyne
*
- *
- * Code for ip_vs_expect_related and ip_vs_expect_callback is taken from
- * http://www.ssi.bg/~ja/nfct/:
- *
- * ip_vs_nfct.c: Netfilter connection tracking support for IPVS
- *
- * Portions Copyright (C) 2001-2002
- * Antefacto Ltd, 181 Parnell St, Dublin 1, Ireland.
- *
- * Portions Copyright (C) 2003-2008
- * Julian Anastasov
*/
#define KMSG_COMPONENT "IPVS"
#define SERVER_STRING "227 Entering Passive Mode ("
#define CLIENT_STRING "PORT "
-#define FMT_TUPLE "%pI4:%u->%pI4:%u/%u"
-#define ARG_TUPLE(T) &(T)->src.u3.ip, ntohs((T)->src.u.all), \
- &(T)->dst.u3.ip, ntohs((T)->dst.u.all), \
- (T)->dst.protonum
-
-#define FMT_CONN "%pI4:%u->%pI4:%u->%pI4:%u/%u:%u"
-#define ARG_CONN(C) &((C)->caddr.ip), ntohs((C)->cport), \
- &((C)->vaddr.ip), ntohs((C)->vport), \
- &((C)->daddr.ip), ntohs((C)->dport), \
- (C)->protocol, (C)->state
/*
* List of ports (up to IP_VS_APP_MAX_PORTS) to be handled by helper
static int
ip_vs_ftp_init_conn(struct ip_vs_app *app, struct ip_vs_conn *cp)
{
+ /* We use connection tracking for the command connection */
+ cp->flags |= IP_VS_CONN_F_NFCT;
return 0;
}
return 1;
}
-/*
- * Called from init_conntrack() as expectfn handler.
- */
-static void
-ip_vs_expect_callback(struct nf_conn *ct,
- struct nf_conntrack_expect *exp)
-{
- struct nf_conntrack_tuple *orig, new_reply;
- struct ip_vs_conn *cp;
-
- if (exp->tuple.src.l3num != PF_INET)
- return;
-
- /*
- * We assume that no NF locks are held before this callback.
- * ip_vs_conn_out_get and ip_vs_conn_in_get should match their
- * expectations even if they use wildcard values, now we provide the
- * actual values from the newly created original conntrack direction.
- * The conntrack is confirmed when packet reaches IPVS hooks.
- */
-
- /* RS->CLIENT */
- orig = &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple;
- cp = ip_vs_conn_out_get(exp->tuple.src.l3num, orig->dst.protonum,
- &orig->src.u3, orig->src.u.tcp.port,
- &orig->dst.u3, orig->dst.u.tcp.port);
- if (cp) {
- /* Change reply CLIENT->RS to CLIENT->VS */
- new_reply = ct->tuplehash[IP_CT_DIR_REPLY].tuple;
- IP_VS_DBG(7, "%s(): ct=%p, status=0x%lX, tuples=" FMT_TUPLE ", "
- FMT_TUPLE ", found inout cp=" FMT_CONN "\n",
- __func__, ct, ct->status,
- ARG_TUPLE(orig), ARG_TUPLE(&new_reply),
- ARG_CONN(cp));
- new_reply.dst.u3 = cp->vaddr;
- new_reply.dst.u.tcp.port = cp->vport;
- IP_VS_DBG(7, "%s(): ct=%p, new tuples=" FMT_TUPLE ", " FMT_TUPLE
- ", inout cp=" FMT_CONN "\n",
- __func__, ct,
- ARG_TUPLE(orig), ARG_TUPLE(&new_reply),
- ARG_CONN(cp));
- goto alter;
- }
-
- /* CLIENT->VS */
- cp = ip_vs_conn_in_get(exp->tuple.src.l3num, orig->dst.protonum,
- &orig->src.u3, orig->src.u.tcp.port,
- &orig->dst.u3, orig->dst.u.tcp.port);
- if (cp) {
- /* Change reply VS->CLIENT to RS->CLIENT */
- new_reply = ct->tuplehash[IP_CT_DIR_REPLY].tuple;
- IP_VS_DBG(7, "%s(): ct=%p, status=0x%lX, tuples=" FMT_TUPLE ", "
- FMT_TUPLE ", found outin cp=" FMT_CONN "\n",
- __func__, ct, ct->status,
- ARG_TUPLE(orig), ARG_TUPLE(&new_reply),
- ARG_CONN(cp));
- new_reply.src.u3 = cp->daddr;
- new_reply.src.u.tcp.port = cp->dport;
- IP_VS_DBG(7, "%s(): ct=%p, new tuples=" FMT_TUPLE ", "
- FMT_TUPLE ", outin cp=" FMT_CONN "\n",
- __func__, ct,
- ARG_TUPLE(orig), ARG_TUPLE(&new_reply),
- ARG_CONN(cp));
- goto alter;
- }
-
- IP_VS_DBG(7, "%s(): ct=%p, status=0x%lX, tuple=" FMT_TUPLE
- " - unknown expect\n",
- __func__, ct, ct->status, ARG_TUPLE(orig));
- return;
-
-alter:
- /* Never alter conntrack for non-NAT conns */
- if (IP_VS_FWD_METHOD(cp) == IP_VS_CONN_F_MASQ)
- nf_conntrack_alter_reply(ct, &new_reply);
- ip_vs_conn_put(cp);
- return;
-}
-
-/*
- * Create NF conntrack expectation with wildcard (optional) source port.
- * Then the default callback function will alter the reply and will confirm
- * the conntrack entry when the first packet comes.
- */
-static void
-ip_vs_expect_related(struct sk_buff *skb, struct nf_conn *ct,
- struct ip_vs_conn *cp, u_int8_t proto,
- const __be16 *port, int from_rs)
-{
- struct nf_conntrack_expect *exp;
-
- BUG_ON(!ct || ct == &nf_conntrack_untracked);
-
- exp = nf_ct_expect_alloc(ct);
- if (!exp)
- return;
-
- if (from_rs)
- nf_ct_expect_init(exp, NF_CT_EXPECT_CLASS_DEFAULT,
- nf_ct_l3num(ct), &cp->daddr, &cp->caddr,
- proto, port, &cp->cport);
- else
- nf_ct_expect_init(exp, NF_CT_EXPECT_CLASS_DEFAULT,
- nf_ct_l3num(ct), &cp->caddr, &cp->vaddr,
- proto, port, &cp->vport);
-
- exp->expectfn = ip_vs_expect_callback;
-
- IP_VS_DBG(7, "%s(): ct=%p, expect tuple=" FMT_TUPLE "\n",
- __func__, ct, ARG_TUPLE(&exp->tuple));
- nf_ct_expect_related(exp);
- nf_ct_expect_put(exp);
-}
-
/*
* Look at outgoing ftp packets to catch the response to a PASV command
* from the server (inside-to-outside).
/*
* Now update or create an connection entry for it
*/
- n_cp = ip_vs_conn_out_get(AF_INET, iph->protocol, &from, port,
- &cp->caddr, 0);
+ {
+ struct ip_vs_conn_param p;
+ ip_vs_conn_fill_param(AF_INET, iph->protocol,
+ &from, port, &cp->caddr, 0, &p);
+ n_cp = ip_vs_conn_out_get(&p);
+ }
if (!n_cp) {
- n_cp = ip_vs_conn_new(AF_INET, IPPROTO_TCP,
- &cp->caddr, 0,
- &cp->vaddr, port,
- &from, port,
- IP_VS_CONN_F_NO_CPORT,
+ struct ip_vs_conn_param p;
+ ip_vs_conn_fill_param(AF_INET, IPPROTO_TCP, &cp->caddr,
+ 0, &cp->vaddr, port, &p);
+ n_cp = ip_vs_conn_new(&p, &from, port,
+ IP_VS_CONN_F_NO_CPORT |
+ IP_VS_CONN_F_NFCT,
cp->dest);
if (!n_cp)
return 0;
ret = nf_nat_mangle_tcp_packet(skb, ct, ctinfo,
start-data, end-start,
buf, buf_len);
- if (ret)
- ip_vs_expect_related(skb, ct, n_cp,
- IPPROTO_TCP, NULL, 0);
+ if (ret) {
+ ip_vs_nfct_expect_related(skb, ct, n_cp,
+ IPPROTO_TCP, 0, 0);
+ if (skb->ip_summed == CHECKSUM_COMPLETE)
+ skb->ip_summed = CHECKSUM_UNNECESSARY;
+ /* csum is updated */
+ ret = 1;
+ }
}
/*
ip_vs_proto_name(iph->protocol),
&to.ip, ntohs(port), &cp->vaddr.ip, 0);
- n_cp = ip_vs_conn_in_get(AF_INET, iph->protocol,
- &to, port,
- &cp->vaddr, htons(ntohs(cp->vport)-1));
- if (!n_cp) {
- n_cp = ip_vs_conn_new(AF_INET, IPPROTO_TCP,
- &to, port,
+ {
+ struct ip_vs_conn_param p;
+ ip_vs_conn_fill_param(AF_INET, iph->protocol, &to, port,
&cp->vaddr, htons(ntohs(cp->vport)-1),
- &cp->daddr, htons(ntohs(cp->dport)-1),
- 0,
- cp->dest);
- if (!n_cp)
- return 0;
+ &p);
+ n_cp = ip_vs_conn_in_get(&p);
+ if (!n_cp) {
+ n_cp = ip_vs_conn_new(&p, &cp->daddr,
+ htons(ntohs(cp->dport)-1),
+ IP_VS_CONN_F_NFCT, cp->dest);
+ if (!n_cp)
+ return 0;
- /* add its controller */
- ip_vs_control_add(n_cp, cp);
+ /* add its controller */
+ ip_vs_control_add(n_cp, cp);
+ }
}
/*
--- /dev/null
+/*
+ * ip_vs_nfct.c: Netfilter connection tracking support for IPVS
+ *
+ * Portions Copyright (C) 2001-2002
+ * Antefacto Ltd, 181 Parnell St, Dublin 1, Ireland.
+ *
+ * Portions Copyright (C) 2003-2010
+ * Julian Anastasov
+ *
+ *
+ * This code is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ *
+ * Authors:
+ * Ben North <ben@redfrontdoor.org>
+ * Julian Anastasov <ja@ssi.bg> Reorganize and sync with latest kernels
+ * Hannes Eder <heder@google.com> Extend NFCT support for FTP, ipvs match
+ *
+ *
+ * Current status:
+ *
+ * - provide conntrack confirmation for new and related connections, by
+ * this way we can see their proper conntrack state in all hooks
+ * - support for all forwarding methods, not only NAT
+ * - FTP support (NAT), ability to support other NAT apps with expectations
+ * - to correctly create expectations for related NAT connections the proper
+ * NF conntrack support must be already installed, eg. ip_vs_ftp requires
+ * nf_conntrack_ftp ... iptables_nat for the same ports (but no iptables
+ * NAT rules are needed)
+ * - alter reply for NAT when forwarding packet in original direction:
+ * conntrack from client in NEW or RELATED (Passive FTP DATA) state or
+ * when RELATED conntrack is created from real server (Active FTP DATA)
+ * - if iptables_nat is not loaded the Passive FTP will not work (the
+ * PASV response can not be NAT-ed) but Active FTP should work
+ *
+ */
+
+#define KMSG_COMPONENT "IPVS"
+#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/compiler.h>
+#include <linux/vmalloc.h>
+#include <linux/skbuff.h>
+#include <net/ip.h>
+#include <linux/netfilter.h>
+#include <linux/netfilter_ipv4.h>
+#include <net/ip_vs.h>
+#include <net/netfilter/nf_conntrack_core.h>
+#include <net/netfilter/nf_conntrack_expect.h>
+#include <net/netfilter/nf_conntrack_helper.h>
+#include <net/netfilter/nf_conntrack_zones.h>
+
+
+#define FMT_TUPLE "%pI4:%u->%pI4:%u/%u"
+#define ARG_TUPLE(T) &(T)->src.u3.ip, ntohs((T)->src.u.all), \
+ &(T)->dst.u3.ip, ntohs((T)->dst.u.all), \
+ (T)->dst.protonum
+
+#define FMT_CONN "%pI4:%u->%pI4:%u->%pI4:%u/%u:%u"
+#define ARG_CONN(C) &((C)->caddr.ip), ntohs((C)->cport), \
+ &((C)->vaddr.ip), ntohs((C)->vport), \
+ &((C)->daddr.ip), ntohs((C)->dport), \
+ (C)->protocol, (C)->state
+
+void
+ip_vs_update_conntrack(struct sk_buff *skb, struct ip_vs_conn *cp, int outin)
+{
+ enum ip_conntrack_info ctinfo;
+ struct nf_conn *ct = ct = nf_ct_get(skb, &ctinfo);
+ struct nf_conntrack_tuple new_tuple;
+
+ if (ct == NULL || nf_ct_is_confirmed(ct) || nf_ct_is_untracked(ct) ||
+ nf_ct_is_dying(ct))
+ return;
+
+ /* Never alter conntrack for non-NAT conns */
+ if (IP_VS_FWD_METHOD(cp) != IP_VS_CONN_F_MASQ)
+ return;
+
+ /* Alter reply only in original direction */
+ if (CTINFO2DIR(ctinfo) != IP_CT_DIR_ORIGINAL)
+ return;
+
+ /*
+ * The connection is not yet in the hashtable, so we update it.
+ * CIP->VIP will remain the same, so leave the tuple in
+ * IP_CT_DIR_ORIGINAL untouched. When the reply comes back from the
+ * real-server we will see RIP->DIP.
+ */
+ new_tuple = ct->tuplehash[IP_CT_DIR_REPLY].tuple;
+ /*
+ * This will also take care of UDP and other protocols.
+ */
+ if (outin) {
+ new_tuple.src.u3 = cp->daddr;
+ if (new_tuple.dst.protonum != IPPROTO_ICMP &&
+ new_tuple.dst.protonum != IPPROTO_ICMPV6)
+ new_tuple.src.u.tcp.port = cp->dport;
+ } else {
+ new_tuple.dst.u3 = cp->vaddr;
+ if (new_tuple.dst.protonum != IPPROTO_ICMP &&
+ new_tuple.dst.protonum != IPPROTO_ICMPV6)
+ new_tuple.dst.u.tcp.port = cp->vport;
+ }
+ IP_VS_DBG(7, "%s: Updating conntrack ct=%p, status=0x%lX, "
+ "ctinfo=%d, old reply=" FMT_TUPLE
+ ", new reply=" FMT_TUPLE ", cp=" FMT_CONN "\n",
+ __func__, ct, ct->status, ctinfo,
+ ARG_TUPLE(&ct->tuplehash[IP_CT_DIR_REPLY].tuple),
+ ARG_TUPLE(&new_tuple), ARG_CONN(cp));
+ nf_conntrack_alter_reply(ct, &new_tuple);
+}
+
+int ip_vs_confirm_conntrack(struct sk_buff *skb, struct ip_vs_conn *cp)
+{
+ return nf_conntrack_confirm(skb);
+}
+
+/*
+ * Called from init_conntrack() as expectfn handler.
+ */
+static void ip_vs_nfct_expect_callback(struct nf_conn *ct,
+ struct nf_conntrack_expect *exp)
+{
+ struct nf_conntrack_tuple *orig, new_reply;
+ struct ip_vs_conn *cp;
+ struct ip_vs_conn_param p;
+
+ if (exp->tuple.src.l3num != PF_INET)
+ return;
+
+ /*
+ * We assume that no NF locks are held before this callback.
+ * ip_vs_conn_out_get and ip_vs_conn_in_get should match their
+ * expectations even if they use wildcard values, now we provide the
+ * actual values from the newly created original conntrack direction.
+ * The conntrack is confirmed when packet reaches IPVS hooks.
+ */
+
+ /* RS->CLIENT */
+ orig = &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple;
+ ip_vs_conn_fill_param(exp->tuple.src.l3num, orig->dst.protonum,
+ &orig->src.u3, orig->src.u.tcp.port,
+ &orig->dst.u3, orig->dst.u.tcp.port, &p);
+ cp = ip_vs_conn_out_get(&p);
+ if (cp) {
+ /* Change reply CLIENT->RS to CLIENT->VS */
+ new_reply = ct->tuplehash[IP_CT_DIR_REPLY].tuple;
+ IP_VS_DBG(7, "%s: ct=%p, status=0x%lX, tuples=" FMT_TUPLE ", "
+ FMT_TUPLE ", found inout cp=" FMT_CONN "\n",
+ __func__, ct, ct->status,
+ ARG_TUPLE(orig), ARG_TUPLE(&new_reply),
+ ARG_CONN(cp));
+ new_reply.dst.u3 = cp->vaddr;
+ new_reply.dst.u.tcp.port = cp->vport;
+ IP_VS_DBG(7, "%s: ct=%p, new tuples=" FMT_TUPLE ", " FMT_TUPLE
+ ", inout cp=" FMT_CONN "\n",
+ __func__, ct,
+ ARG_TUPLE(orig), ARG_TUPLE(&new_reply),
+ ARG_CONN(cp));
+ goto alter;
+ }
+
+ /* CLIENT->VS */
+ cp = ip_vs_conn_in_get(&p);
+ if (cp) {
+ /* Change reply VS->CLIENT to RS->CLIENT */
+ new_reply = ct->tuplehash[IP_CT_DIR_REPLY].tuple;
+ IP_VS_DBG(7, "%s: ct=%p, status=0x%lX, tuples=" FMT_TUPLE ", "
+ FMT_TUPLE ", found outin cp=" FMT_CONN "\n",
+ __func__, ct, ct->status,
+ ARG_TUPLE(orig), ARG_TUPLE(&new_reply),
+ ARG_CONN(cp));
+ new_reply.src.u3 = cp->daddr;
+ new_reply.src.u.tcp.port = cp->dport;
+ IP_VS_DBG(7, "%s: ct=%p, new tuples=" FMT_TUPLE ", "
+ FMT_TUPLE ", outin cp=" FMT_CONN "\n",
+ __func__, ct,
+ ARG_TUPLE(orig), ARG_TUPLE(&new_reply),
+ ARG_CONN(cp));
+ goto alter;
+ }
+
+ IP_VS_DBG(7, "%s: ct=%p, status=0x%lX, tuple=" FMT_TUPLE
+ " - unknown expect\n",
+ __func__, ct, ct->status, ARG_TUPLE(orig));
+ return;
+
+alter:
+ /* Never alter conntrack for non-NAT conns */
+ if (IP_VS_FWD_METHOD(cp) == IP_VS_CONN_F_MASQ)
+ nf_conntrack_alter_reply(ct, &new_reply);
+ ip_vs_conn_put(cp);
+ return;
+}
+
+/*
+ * Create NF conntrack expectation with wildcard (optional) source port.
+ * Then the default callback function will alter the reply and will confirm
+ * the conntrack entry when the first packet comes.
+ * Use port 0 to expect connection from any port.
+ */
+void ip_vs_nfct_expect_related(struct sk_buff *skb, struct nf_conn *ct,
+ struct ip_vs_conn *cp, u_int8_t proto,
+ const __be16 port, int from_rs)
+{
+ struct nf_conntrack_expect *exp;
+
+ if (ct == NULL || nf_ct_is_untracked(ct))
+ return;
+
+ exp = nf_ct_expect_alloc(ct);
+ if (!exp)
+ return;
+
+ nf_ct_expect_init(exp, NF_CT_EXPECT_CLASS_DEFAULT, nf_ct_l3num(ct),
+ from_rs ? &cp->daddr : &cp->caddr,
+ from_rs ? &cp->caddr : &cp->vaddr,
+ proto, port ? &port : NULL,
+ from_rs ? &cp->cport : &cp->vport);
+
+ exp->expectfn = ip_vs_nfct_expect_callback;
+
+ IP_VS_DBG(7, "%s: ct=%p, expect tuple=" FMT_TUPLE "\n",
+ __func__, ct, ARG_TUPLE(&exp->tuple));
+ nf_ct_expect_related(exp);
+ nf_ct_expect_put(exp);
+}
+EXPORT_SYMBOL(ip_vs_nfct_expect_related);
+
+/*
+ * Our connection was terminated, try to drop the conntrack immediately
+ */
+void ip_vs_conn_drop_conntrack(struct ip_vs_conn *cp)
+{
+ struct nf_conntrack_tuple_hash *h;
+ struct nf_conn *ct;
+ struct nf_conntrack_tuple tuple;
+
+ if (!cp->cport)
+ return;
+
+ tuple = (struct nf_conntrack_tuple) {
+ .dst = { .protonum = cp->protocol, .dir = IP_CT_DIR_ORIGINAL } };
+ tuple.src.u3 = cp->caddr;
+ tuple.src.u.all = cp->cport;
+ tuple.src.l3num = cp->af;
+ tuple.dst.u3 = cp->vaddr;
+ tuple.dst.u.all = cp->vport;
+
+ IP_VS_DBG(7, "%s: dropping conntrack with tuple=" FMT_TUPLE
+ " for conn " FMT_CONN "\n",
+ __func__, ARG_TUPLE(&tuple), ARG_CONN(cp));
+
+ h = nf_conntrack_find_get(&init_net, NF_CT_DEFAULT_ZONE, &tuple);
+ if (h) {
+ ct = nf_ct_tuplehash_to_ctrack(h);
+ /* Show what happens instead of calling nf_ct_kill() */
+ if (del_timer(&ct->timeout)) {
+ IP_VS_DBG(7, "%s: ct=%p, deleted conntrack timer for tuple="
+ FMT_TUPLE "\n",
+ __func__, ct, ARG_TUPLE(&tuple));
+ if (ct->timeout.function)
+ ct->timeout.function(ct->timeout.data);
+ } else {
+ IP_VS_DBG(7, "%s: ct=%p, no conntrack timer for tuple="
+ FMT_TUPLE "\n",
+ __func__, ct, ARG_TUPLE(&tuple));
+ }
+ nf_ct_put(ct);
+ } else {
+ IP_VS_DBG(7, "%s: no conntrack for tuple=" FMT_TUPLE "\n",
+ __func__, ARG_TUPLE(&tuple));
+ }
+}
+
--- /dev/null
+#define KMSG_COMPONENT "IPVS"
+#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+
+#include <linux/module.h>
+#include <linux/spinlock.h>
+#include <linux/interrupt.h>
+#include <asm/string.h>
+#include <linux/kmod.h>
+#include <linux/sysctl.h>
+
+#include <net/ip_vs.h>
+
+/* IPVS pe list */
+static LIST_HEAD(ip_vs_pe);
+
+/* lock for service table */
+static DEFINE_SPINLOCK(ip_vs_pe_lock);
+
+/* Bind a service with a pe */
+void ip_vs_bind_pe(struct ip_vs_service *svc, struct ip_vs_pe *pe)
+{
+ svc->pe = pe;
+}
+
+/* Unbind a service from its pe */
+void ip_vs_unbind_pe(struct ip_vs_service *svc)
+{
+ svc->pe = NULL;
+}
+
+/* Get pe in the pe list by name */
+static struct ip_vs_pe *
+ip_vs_pe_getbyname(const char *pe_name)
+{
+ struct ip_vs_pe *pe;
+
+ IP_VS_DBG(2, "%s(): pe_name \"%s\"\n", __func__,
+ pe_name);
+
+ spin_lock_bh(&ip_vs_pe_lock);
+
+ list_for_each_entry(pe, &ip_vs_pe, n_list) {
+ /* Test and get the modules atomically */
+ if (pe->module &&
+ !try_module_get(pe->module)) {
+ /* This pe is just deleted */
+ continue;
+ }
+ if (strcmp(pe_name, pe->name)==0) {
+ /* HIT */
+ spin_unlock_bh(&ip_vs_pe_lock);
+ return pe;
+ }
+ if (pe->module)
+ module_put(pe->module);
+ }
+
+ spin_unlock_bh(&ip_vs_pe_lock);
+ return NULL;
+}
+
+/* Lookup pe and try to load it if it doesn't exist */
+struct ip_vs_pe *ip_vs_pe_get(const char *name)
+{
+ struct ip_vs_pe *pe;
+
+ /* Search for the pe by name */
+ pe = ip_vs_pe_getbyname(name);
+
+ /* If pe not found, load the module and search again */
+ if (!pe) {
+ request_module("ip_vs_pe_%s", name);
+ pe = ip_vs_pe_getbyname(name);
+ }
+
+ return pe;
+}
+
+void ip_vs_pe_put(struct ip_vs_pe *pe)
+{
+ if (pe && pe->module)
+ module_put(pe->module);
+}
+
+/* Register a pe in the pe list */
+int register_ip_vs_pe(struct ip_vs_pe *pe)
+{
+ struct ip_vs_pe *tmp;
+
+ /* increase the module use count */
+ ip_vs_use_count_inc();
+
+ spin_lock_bh(&ip_vs_pe_lock);
+
+ if (!list_empty(&pe->n_list)) {
+ spin_unlock_bh(&ip_vs_pe_lock);
+ ip_vs_use_count_dec();
+ pr_err("%s(): [%s] pe already linked\n",
+ __func__, pe->name);
+ return -EINVAL;
+ }
+
+ /* Make sure that the pe with this name doesn't exist
+ * in the pe list.
+ */
+ list_for_each_entry(tmp, &ip_vs_pe, n_list) {
+ if (strcmp(tmp->name, pe->name) == 0) {
+ spin_unlock_bh(&ip_vs_pe_lock);
+ ip_vs_use_count_dec();
+ pr_err("%s(): [%s] pe already existed "
+ "in the system\n", __func__, pe->name);
+ return -EINVAL;
+ }
+ }
+ /* Add it into the d-linked pe list */
+ list_add(&pe->n_list, &ip_vs_pe);
+ spin_unlock_bh(&ip_vs_pe_lock);
+
+ pr_info("[%s] pe registered.\n", pe->name);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(register_ip_vs_pe);
+
+/* Unregister a pe from the pe list */
+int unregister_ip_vs_pe(struct ip_vs_pe *pe)
+{
+ spin_lock_bh(&ip_vs_pe_lock);
+ if (list_empty(&pe->n_list)) {
+ spin_unlock_bh(&ip_vs_pe_lock);
+ pr_err("%s(): [%s] pe is not in the list. failed\n",
+ __func__, pe->name);
+ return -EINVAL;
+ }
+
+ /* Remove it from the d-linked pe list */
+ list_del(&pe->n_list);
+ spin_unlock_bh(&ip_vs_pe_lock);
+
+ /* decrease the module use count */
+ ip_vs_use_count_dec();
+
+ pr_info("[%s] pe unregistered.\n", pe->name);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(unregister_ip_vs_pe);
--- /dev/null
+#define KMSG_COMPONENT "IPVS"
+#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+
+#include <net/ip_vs.h>
+#include <net/netfilter/nf_conntrack.h>
+#include <linux/netfilter/nf_conntrack_sip.h>
+
+#ifdef CONFIG_IP_VS_DEBUG
+static const char *ip_vs_dbg_callid(char *buf, size_t buf_len,
+ const char *callid, size_t callid_len,
+ int *idx)
+{
+ size_t len = min(min(callid_len, (size_t)64), buf_len - *idx - 1);
+ memcpy(buf + *idx, callid, len);
+ buf[*idx+len] = '\0';
+ *idx += len + 1;
+ return buf + *idx - len;
+}
+
+#define IP_VS_DEBUG_CALLID(callid, len) \
+ ip_vs_dbg_callid(ip_vs_dbg_buf, sizeof(ip_vs_dbg_buf), \
+ callid, len, &ip_vs_dbg_idx)
+#endif
+
+static int get_callid(const char *dptr, unsigned int dataoff,
+ unsigned int datalen,
+ unsigned int *matchoff, unsigned int *matchlen)
+{
+ /* Find callid */
+ while (1) {
+ int ret = ct_sip_get_header(NULL, dptr, dataoff, datalen,
+ SIP_HDR_CALL_ID, matchoff,
+ matchlen);
+ if (ret > 0)
+ break;
+ if (!ret)
+ return 0;
+ dataoff += *matchoff;
+ }
+
+ /* Empty callid is useless */
+ if (!*matchlen)
+ return -EINVAL;
+
+ /* Too large is useless */
+ if (*matchlen > IP_VS_PEDATA_MAXLEN)
+ return -EINVAL;
+
+ /* SIP headers are always followed by a line terminator */
+ if (*matchoff + *matchlen == datalen)
+ return -EINVAL;
+
+ /* RFC 2543 allows lines to be terminated with CR, LF or CRLF,
+ * RFC 3261 allows only CRLF, we support both. */
+ if (*(dptr + *matchoff + *matchlen) != '\r' &&
+ *(dptr + *matchoff + *matchlen) != '\n')
+ return -EINVAL;
+
+ IP_VS_DBG_BUF(9, "SIP callid %s (%d bytes)\n",
+ IP_VS_DEBUG_CALLID(dptr + *matchoff, *matchlen),
+ *matchlen);
+ return 0;
+}
+
+static int
+ip_vs_sip_fill_param(struct ip_vs_conn_param *p, struct sk_buff *skb)
+{
+ struct ip_vs_iphdr iph;
+ unsigned int dataoff, datalen, matchoff, matchlen;
+ const char *dptr;
+
+ ip_vs_fill_iphdr(p->af, skb_network_header(skb), &iph);
+
+ /* Only useful with UDP */
+ if (iph.protocol != IPPROTO_UDP)
+ return -EINVAL;
+
+ /* No Data ? */
+ dataoff = iph.len + sizeof(struct udphdr);
+ if (dataoff >= skb->len)
+ return -EINVAL;
+
+ dptr = skb->data + dataoff;
+ datalen = skb->len - dataoff;
+
+ if (get_callid(dptr, dataoff, datalen, &matchoff, &matchlen))
+ return -EINVAL;
+
+ p->pe_data = kmalloc(matchlen, GFP_ATOMIC);
+ if (!p->pe_data)
+ return -ENOMEM;
+
+ /* N.B: pe_data is only set on success,
+ * this allows fallback to the default persistence logic on failure
+ */
+ memcpy(p->pe_data, dptr + matchoff, matchlen);
+ p->pe_data_len = matchlen;
+
+ return 0;
+}
+
+static bool ip_vs_sip_ct_match(const struct ip_vs_conn_param *p,
+ struct ip_vs_conn *ct)
+
+{
+ bool ret = 0;
+
+ if (ct->af == p->af &&
+ ip_vs_addr_equal(p->af, p->caddr, &ct->caddr) &&
+ /* protocol should only be IPPROTO_IP if
+ * d_addr is a fwmark */
+ ip_vs_addr_equal(p->protocol == IPPROTO_IP ? AF_UNSPEC : p->af,
+ p->vaddr, &ct->vaddr) &&
+ ct->vport == p->vport &&
+ ct->flags & IP_VS_CONN_F_TEMPLATE &&
+ ct->protocol == p->protocol &&
+ ct->pe_data && ct->pe_data_len == p->pe_data_len &&
+ !memcmp(ct->pe_data, p->pe_data, p->pe_data_len))
+ ret = 1;
+
+ IP_VS_DBG_BUF(9, "SIP template match %s %s->%s:%d %s\n",
+ ip_vs_proto_name(p->protocol),
+ IP_VS_DEBUG_CALLID(p->pe_data, p->pe_data_len),
+ IP_VS_DBG_ADDR(p->af, p->vaddr), ntohs(p->vport),
+ ret ? "hit" : "not hit");
+
+ return ret;
+}
+
+static u32 ip_vs_sip_hashkey_raw(const struct ip_vs_conn_param *p,
+ u32 initval, bool inverse)
+{
+ return jhash(p->pe_data, p->pe_data_len, initval);
+}
+
+static int ip_vs_sip_show_pe_data(const struct ip_vs_conn *cp, char *buf)
+{
+ memcpy(buf, cp->pe_data, cp->pe_data_len);
+ return cp->pe_data_len;
+}
+
+static struct ip_vs_pe ip_vs_sip_pe =
+{
+ .name = "sip",
+ .refcnt = ATOMIC_INIT(0),
+ .module = THIS_MODULE,
+ .n_list = LIST_HEAD_INIT(ip_vs_sip_pe.n_list),
+ .fill_param = ip_vs_sip_fill_param,
+ .ct_match = ip_vs_sip_ct_match,
+ .hashkey_raw = ip_vs_sip_hashkey_raw,
+ .show_pe_data = ip_vs_sip_show_pe_data,
+};
+
+static int __init ip_vs_sip_init(void)
+{
+ return register_ip_vs_pe(&ip_vs_sip_pe);
+}
+
+static void __exit ip_vs_sip_cleanup(void)
+{
+ unregister_ip_vs_pe(&ip_vs_sip_pe);
+}
+
+module_init(ip_vs_sip_init);
+module_exit(ip_vs_sip_cleanup);
+MODULE_LICENSE("GPL");
else if (ih->frag_off & htons(IP_OFFSET))
sprintf(buf, "%pI4->%pI4 frag", &ih->saddr, &ih->daddr);
else {
- __be16 _ports[2], *pptr
-;
+ __be16 _ports[2], *pptr;
+
pptr = skb_header_pointer(skb, offset + ih->ihl*4,
sizeof(_ports), _ports);
if (pptr == NULL)
void
-ip_vs_tcpudp_debug_packet(struct ip_vs_protocol *pp,
+ip_vs_tcpudp_debug_packet(int af, struct ip_vs_protocol *pp,
const struct sk_buff *skb,
int offset,
const char *msg)
{
#ifdef CONFIG_IP_VS_IPV6
- if (skb->protocol == htons(ETH_P_IPV6))
+ if (af == AF_INET6)
ip_vs_tcpudp_debug_packet_v6(pp, skb, offset, msg);
else
#endif
#define PORT_ISAKMP 500
+static void
+ah_esp_conn_fill_param_proto(int af, const struct ip_vs_iphdr *iph,
+ int inverse, struct ip_vs_conn_param *p)
+{
+ if (likely(!inverse))
+ ip_vs_conn_fill_param(af, IPPROTO_UDP,
+ &iph->saddr, htons(PORT_ISAKMP),
+ &iph->daddr, htons(PORT_ISAKMP), p);
+ else
+ ip_vs_conn_fill_param(af, IPPROTO_UDP,
+ &iph->daddr, htons(PORT_ISAKMP),
+ &iph->saddr, htons(PORT_ISAKMP), p);
+}
static struct ip_vs_conn *
ah_esp_conn_in_get(int af, const struct sk_buff *skb, struct ip_vs_protocol *pp,
int inverse)
{
struct ip_vs_conn *cp;
+ struct ip_vs_conn_param p;
- if (likely(!inverse)) {
- cp = ip_vs_conn_in_get(af, IPPROTO_UDP,
- &iph->saddr,
- htons(PORT_ISAKMP),
- &iph->daddr,
- htons(PORT_ISAKMP));
- } else {
- cp = ip_vs_conn_in_get(af, IPPROTO_UDP,
- &iph->daddr,
- htons(PORT_ISAKMP),
- &iph->saddr,
- htons(PORT_ISAKMP));
- }
-
+ ah_esp_conn_fill_param_proto(af, iph, inverse, &p);
+ cp = ip_vs_conn_in_get(&p);
if (!cp) {
/*
* We are not sure if the packet is from our
int inverse)
{
struct ip_vs_conn *cp;
+ struct ip_vs_conn_param p;
- if (likely(!inverse)) {
- cp = ip_vs_conn_out_get(af, IPPROTO_UDP,
- &iph->saddr,
- htons(PORT_ISAKMP),
- &iph->daddr,
- htons(PORT_ISAKMP));
- } else {
- cp = ip_vs_conn_out_get(af, IPPROTO_UDP,
- &iph->daddr,
- htons(PORT_ISAKMP),
- &iph->saddr,
- htons(PORT_ISAKMP));
- }
-
+ ah_esp_conn_fill_param_proto(af, iph, inverse, &p);
+ cp = ip_vs_conn_out_get(&p);
if (!cp) {
IP_VS_DBG_BUF(12, "Unknown ISAKMP entry for inout packet "
"%s%s %s->%s\n",
return 0;
}
-
-static void
-ah_esp_debug_packet_v4(struct ip_vs_protocol *pp, const struct sk_buff *skb,
- int offset, const char *msg)
-{
- char buf[256];
- struct iphdr _iph, *ih;
-
- ih = skb_header_pointer(skb, offset, sizeof(_iph), &_iph);
- if (ih == NULL)
- sprintf(buf, "TRUNCATED");
- else
- sprintf(buf, "%pI4->%pI4", &ih->saddr, &ih->daddr);
-
- pr_debug("%s: %s %s\n", msg, pp->name, buf);
-}
-
-#ifdef CONFIG_IP_VS_IPV6
-static void
-ah_esp_debug_packet_v6(struct ip_vs_protocol *pp, const struct sk_buff *skb,
- int offset, const char *msg)
-{
- char buf[256];
- struct ipv6hdr _iph, *ih;
-
- ih = skb_header_pointer(skb, offset, sizeof(_iph), &_iph);
- if (ih == NULL)
- sprintf(buf, "TRUNCATED");
- else
- sprintf(buf, "%pI6->%pI6", &ih->saddr, &ih->daddr);
-
- pr_debug("%s: %s %s\n", msg, pp->name, buf);
-}
-#endif
-
-static void
-ah_esp_debug_packet(struct ip_vs_protocol *pp, const struct sk_buff *skb,
- int offset, const char *msg)
-{
-#ifdef CONFIG_IP_VS_IPV6
- if (skb->protocol == htons(ETH_P_IPV6))
- ah_esp_debug_packet_v6(pp, skb, offset, msg);
- else
-#endif
- ah_esp_debug_packet_v4(pp, skb, offset, msg);
-}
-
-
static void ah_esp_init(struct ip_vs_protocol *pp)
{
/* nothing to do now */
.register_app = NULL,
.unregister_app = NULL,
.app_conn_bind = NULL,
- .debug_packet = ah_esp_debug_packet,
+ .debug_packet = ip_vs_tcpudp_debug_packet,
.timeout_change = NULL, /* ISAKMP */
.set_state_timeout = NULL,
};
.register_app = NULL,
.unregister_app = NULL,
.app_conn_bind = NULL,
- .debug_packet = ah_esp_debug_packet,
+ .debug_packet = ip_vs_tcpudp_debug_packet,
.timeout_change = NULL, /* ISAKMP */
};
#endif
if ((sch->type == SCTP_CID_INIT) &&
(svc = ip_vs_service_get(af, skb->mark, iph.protocol,
&iph.daddr, sh->dest))) {
+ int ignored;
+
if (ip_vs_todrop()) {
/*
* It seems that we are very loaded.
* Let the virtual server select a real server for the
* incoming connection, and create a connection entry.
*/
- *cpp = ip_vs_schedule(svc, skb);
- if (!*cpp) {
+ *cpp = ip_vs_schedule(svc, skb, pp, &ignored);
+ if (!*cpp && !ignored) {
*verdict = ip_vs_leave(svc, skb, pp);
return 0;
}
if (val != cmp) {
/* CRC failure, dump it. */
- IP_VS_DBG_RL_PKT(0, pp, skb, 0,
+ IP_VS_DBG_RL_PKT(0, af, pp, skb, 0,
"Failed checksum for");
return 0;
}
return 0;
}
+ /* No !th->ack check to allow scheduling on SYN+ACK for Active FTP */
if (th->syn &&
(svc = ip_vs_service_get(af, skb->mark, iph.protocol, &iph.daddr,
th->dest))) {
+ int ignored;
+
if (ip_vs_todrop()) {
/*
* It seems that we are very loaded.
* Let the virtual server select a real server for the
* incoming connection, and create a connection entry.
*/
- *cpp = ip_vs_schedule(svc, skb);
- if (!*cpp) {
+ *cpp = ip_vs_schedule(svc, skb, pp, &ignored);
+ if (!*cpp && !ignored) {
*verdict = ip_vs_leave(svc, skb, pp);
return 0;
}
#ifdef CONFIG_IP_VS_IPV6
if (af == AF_INET6)
tcph->check =
- csum_fold(ip_vs_check_diff16(oldip->ip6, newip->ip6,
+ ~csum_fold(ip_vs_check_diff16(oldip->ip6, newip->ip6,
ip_vs_check_diff2(oldlen, newlen,
- ~csum_unfold(tcph->check))));
+ csum_unfold(tcph->check))));
else
#endif
tcph->check =
- csum_fold(ip_vs_check_diff4(oldip->ip, newip->ip,
+ ~csum_fold(ip_vs_check_diff4(oldip->ip, newip->ip,
ip_vs_check_diff2(oldlen, newlen,
- ~csum_unfold(tcph->check))));
+ csum_unfold(tcph->check))));
}
struct tcphdr *tcph;
unsigned int tcphoff;
int oldlen;
+ int payload_csum = 0;
#ifdef CONFIG_IP_VS_IPV6
if (cp->af == AF_INET6)
return 0;
if (unlikely(cp->app != NULL)) {
+ int ret;
+
/* Some checks before mangling */
if (pp->csum_check && !pp->csum_check(cp->af, skb, pp))
return 0;
/* Call application helper if needed */
- if (!ip_vs_app_pkt_out(cp, skb))
+ if (!(ret = ip_vs_app_pkt_out(cp, skb)))
return 0;
+ /* ret=2: csum update is needed after payload mangling */
+ if (ret == 1)
+ oldlen = skb->len - tcphoff;
+ else
+ payload_csum = 1;
}
tcph = (void *)skb_network_header(skb) + tcphoff;
tcp_partial_csum_update(cp->af, tcph, &cp->daddr, &cp->vaddr,
htons(oldlen),
htons(skb->len - tcphoff));
- } else if (!cp->app) {
+ } else if (!payload_csum) {
/* Only port and addr are changed, do fast csum update */
tcp_fast_csum_update(cp->af, tcph, &cp->daddr, &cp->vaddr,
cp->dport, cp->vport);
if (skb->ip_summed == CHECKSUM_COMPLETE)
- skb->ip_summed = CHECKSUM_NONE;
+ skb->ip_summed = (cp->app && pp->csum_check) ?
+ CHECKSUM_UNNECESSARY : CHECKSUM_NONE;
} else {
/* full checksum calculation */
tcph->check = 0;
skb->len - tcphoff,
cp->protocol,
skb->csum);
+ skb->ip_summed = CHECKSUM_UNNECESSARY;
IP_VS_DBG(11, "O-pkt: %s O-csum=%d (+%zd)\n",
pp->name, tcph->check,
struct tcphdr *tcph;
unsigned int tcphoff;
int oldlen;
+ int payload_csum = 0;
#ifdef CONFIG_IP_VS_IPV6
if (cp->af == AF_INET6)
return 0;
if (unlikely(cp->app != NULL)) {
+ int ret;
+
/* Some checks before mangling */
if (pp->csum_check && !pp->csum_check(cp->af, skb, pp))
return 0;
* Attempt ip_vs_app call.
* It will fix ip_vs_conn and iph ack_seq stuff
*/
- if (!ip_vs_app_pkt_in(cp, skb))
+ if (!(ret = ip_vs_app_pkt_in(cp, skb)))
return 0;
+ /* ret=2: csum update is needed after payload mangling */
+ if (ret == 1)
+ oldlen = skb->len - tcphoff;
+ else
+ payload_csum = 1;
}
tcph = (void *)skb_network_header(skb) + tcphoff;
* Adjust TCP checksums
*/
if (skb->ip_summed == CHECKSUM_PARTIAL) {
- tcp_partial_csum_update(cp->af, tcph, &cp->daddr, &cp->vaddr,
+ tcp_partial_csum_update(cp->af, tcph, &cp->vaddr, &cp->daddr,
htons(oldlen),
htons(skb->len - tcphoff));
- } else if (!cp->app) {
+ } else if (!payload_csum) {
/* Only port and addr are changed, do fast csum update */
tcp_fast_csum_update(cp->af, tcph, &cp->vaddr, &cp->daddr,
cp->vport, cp->dport);
if (skb->ip_summed == CHECKSUM_COMPLETE)
- skb->ip_summed = CHECKSUM_NONE;
+ skb->ip_summed = (cp->app && pp->csum_check) ?
+ CHECKSUM_UNNECESSARY : CHECKSUM_NONE;
} else {
/* full checksum calculation */
tcph->check = 0;
skb->len - tcphoff,
ipv6_hdr(skb)->nexthdr,
skb->csum)) {
- IP_VS_DBG_RL_PKT(0, pp, skb, 0,
+ IP_VS_DBG_RL_PKT(0, af, pp, skb, 0,
"Failed checksum for");
return 0;
}
skb->len - tcphoff,
ip_hdr(skb)->protocol,
skb->csum)) {
- IP_VS_DBG_RL_PKT(0, pp, skb, 0,
+ IP_VS_DBG_RL_PKT(0, af, pp, skb, 0,
"Failed checksum for");
return 0;
}
svc = ip_vs_service_get(af, skb->mark, iph.protocol,
&iph.daddr, uh->dest);
if (svc) {
+ int ignored;
+
if (ip_vs_todrop()) {
/*
* It seems that we are very loaded.
* Let the virtual server select a real server for the
* incoming connection, and create a connection entry.
*/
- *cpp = ip_vs_schedule(svc, skb);
- if (!*cpp) {
+ *cpp = ip_vs_schedule(svc, skb, pp, &ignored);
+ if (!*cpp && !ignored) {
*verdict = ip_vs_leave(svc, skb, pp);
return 0;
}
#ifdef CONFIG_IP_VS_IPV6
if (af == AF_INET6)
uhdr->check =
- csum_fold(ip_vs_check_diff16(oldip->ip6, newip->ip6,
+ ~csum_fold(ip_vs_check_diff16(oldip->ip6, newip->ip6,
ip_vs_check_diff2(oldlen, newlen,
- ~csum_unfold(uhdr->check))));
+ csum_unfold(uhdr->check))));
else
#endif
uhdr->check =
- csum_fold(ip_vs_check_diff4(oldip->ip, newip->ip,
+ ~csum_fold(ip_vs_check_diff4(oldip->ip, newip->ip,
ip_vs_check_diff2(oldlen, newlen,
- ~csum_unfold(uhdr->check))));
+ csum_unfold(uhdr->check))));
}
struct udphdr *udph;
unsigned int udphoff;
int oldlen;
+ int payload_csum = 0;
#ifdef CONFIG_IP_VS_IPV6
if (cp->af == AF_INET6)
return 0;
if (unlikely(cp->app != NULL)) {
+ int ret;
+
/* Some checks before mangling */
if (pp->csum_check && !pp->csum_check(cp->af, skb, pp))
return 0;
/*
* Call application helper if needed
*/
- if (!ip_vs_app_pkt_out(cp, skb))
+ if (!(ret = ip_vs_app_pkt_out(cp, skb)))
return 0;
+ /* ret=2: csum update is needed after payload mangling */
+ if (ret == 1)
+ oldlen = skb->len - udphoff;
+ else
+ payload_csum = 1;
}
udph = (void *)skb_network_header(skb) + udphoff;
udp_partial_csum_update(cp->af, udph, &cp->daddr, &cp->vaddr,
htons(oldlen),
htons(skb->len - udphoff));
- } else if (!cp->app && (udph->check != 0)) {
+ } else if (!payload_csum && (udph->check != 0)) {
/* Only port and addr are changed, do fast csum update */
udp_fast_csum_update(cp->af, udph, &cp->daddr, &cp->vaddr,
cp->dport, cp->vport);
if (skb->ip_summed == CHECKSUM_COMPLETE)
- skb->ip_summed = CHECKSUM_NONE;
+ skb->ip_summed = (cp->app && pp->csum_check) ?
+ CHECKSUM_UNNECESSARY : CHECKSUM_NONE;
} else {
/* full checksum calculation */
udph->check = 0;
skb->csum);
if (udph->check == 0)
udph->check = CSUM_MANGLED_0;
+ skb->ip_summed = CHECKSUM_UNNECESSARY;
IP_VS_DBG(11, "O-pkt: %s O-csum=%d (+%zd)\n",
pp->name, udph->check,
(char*)&(udph->check) - (char*)udph);
struct udphdr *udph;
unsigned int udphoff;
int oldlen;
+ int payload_csum = 0;
#ifdef CONFIG_IP_VS_IPV6
if (cp->af == AF_INET6)
return 0;
if (unlikely(cp->app != NULL)) {
+ int ret;
+
/* Some checks before mangling */
if (pp->csum_check && !pp->csum_check(cp->af, skb, pp))
return 0;
* Attempt ip_vs_app call.
* It will fix ip_vs_conn
*/
- if (!ip_vs_app_pkt_in(cp, skb))
+ if (!(ret = ip_vs_app_pkt_in(cp, skb)))
return 0;
+ /* ret=2: csum update is needed after payload mangling */
+ if (ret == 1)
+ oldlen = skb->len - udphoff;
+ else
+ payload_csum = 1;
}
udph = (void *)skb_network_header(skb) + udphoff;
* Adjust UDP checksums
*/
if (skb->ip_summed == CHECKSUM_PARTIAL) {
- udp_partial_csum_update(cp->af, udph, &cp->daddr, &cp->vaddr,
+ udp_partial_csum_update(cp->af, udph, &cp->vaddr, &cp->daddr,
htons(oldlen),
htons(skb->len - udphoff));
- } else if (!cp->app && (udph->check != 0)) {
+ } else if (!payload_csum && (udph->check != 0)) {
/* Only port and addr are changed, do fast csum update */
udp_fast_csum_update(cp->af, udph, &cp->vaddr, &cp->daddr,
cp->vport, cp->dport);
if (skb->ip_summed == CHECKSUM_COMPLETE)
- skb->ip_summed = CHECKSUM_NONE;
+ skb->ip_summed = (cp->app && pp->csum_check) ?
+ CHECKSUM_UNNECESSARY : CHECKSUM_NONE;
} else {
/* full checksum calculation */
udph->check = 0;
skb->len - udphoff,
ipv6_hdr(skb)->nexthdr,
skb->csum)) {
- IP_VS_DBG_RL_PKT(0, pp, skb, 0,
+ IP_VS_DBG_RL_PKT(0, af, pp, skb, 0,
"Failed checksum for");
return 0;
}
skb->len - udphoff,
ip_hdr(skb)->protocol,
skb->csum)) {
- IP_VS_DBG_RL_PKT(0, pp, skb, 0,
+ IP_VS_DBG_RL_PKT(0, af, pp, skb, 0,
"Failed checksum for");
return 0;
}
{
int ret;
- if (svc == NULL) {
- pr_err("%s(): svc arg NULL\n", __func__);
- return -EINVAL;
- }
- if (scheduler == NULL) {
- pr_err("%s(): scheduler arg NULL\n", __func__);
- return -EINVAL;
- }
-
svc->scheduler = scheduler;
if (scheduler->init_service) {
*/
int ip_vs_unbind_scheduler(struct ip_vs_service *svc)
{
- struct ip_vs_scheduler *sched;
+ struct ip_vs_scheduler *sched = svc->scheduler;
- if (svc == NULL) {
- pr_err("%s(): svc arg NULL\n", __func__);
- return -EINVAL;
- }
-
- sched = svc->scheduler;
- if (sched == NULL) {
- pr_err("%s(): svc isn't bound\n", __func__);
- return -EINVAL;
- }
+ if (!sched)
+ return 0;
if (sched->done_service) {
if (sched->done_service(svc) != 0) {
void ip_vs_scheduler_put(struct ip_vs_scheduler *scheduler)
{
- if (scheduler->module)
+ if (scheduler && scheduler->module)
module_put(scheduler->module);
}
ip_vs_sync_conn(cp->control);
}
+static inline int
+ip_vs_conn_fill_param_sync(int af, int protocol,
+ const union nf_inet_addr *caddr, __be16 cport,
+ const union nf_inet_addr *vaddr, __be16 vport,
+ struct ip_vs_conn_param *p)
+{
+ /* XXX: Need to take into account persistence engine */
+ ip_vs_conn_fill_param(af, protocol, caddr, cport, vaddr, vport, p);
+ return 0;
+}
/*
* Process received multicast message and create the corresponding
struct ip_vs_conn *cp;
struct ip_vs_protocol *pp;
struct ip_vs_dest *dest;
+ struct ip_vs_conn_param param;
char *p;
int i;
}
}
- if (!(flags & IP_VS_CONN_F_TEMPLATE))
- cp = ip_vs_conn_in_get(AF_INET, s->protocol,
- (union nf_inet_addr *)&s->caddr,
- s->cport,
- (union nf_inet_addr *)&s->vaddr,
- s->vport);
- else
- cp = ip_vs_ct_in_get(AF_INET, s->protocol,
- (union nf_inet_addr *)&s->caddr,
- s->cport,
- (union nf_inet_addr *)&s->vaddr,
- s->vport);
+ {
+ if (ip_vs_conn_fill_param_sync(AF_INET, s->protocol,
+ (union nf_inet_addr *)&s->caddr,
+ s->cport,
+ (union nf_inet_addr *)&s->vaddr,
+ s->vport, ¶m)) {
+ pr_err("ip_vs_conn_fill_param_sync failed");
+ return;
+ }
+ if (!(flags & IP_VS_CONN_F_TEMPLATE))
+ cp = ip_vs_conn_in_get(¶m);
+ else
+ cp = ip_vs_ct_in_get(¶m);
+ }
if (!cp) {
/*
* Find the appropriate destination for the connection.
else
flags &= ~IP_VS_CONN_F_INACTIVE;
}
- cp = ip_vs_conn_new(AF_INET, s->protocol,
- (union nf_inet_addr *)&s->caddr,
- s->cport,
- (union nf_inet_addr *)&s->vaddr,
- s->vport,
+ cp = ip_vs_conn_new(¶m,
(union nf_inet_addr *)&s->daddr,
- s->dport,
- flags, dest);
+ s->dport, flags, dest);
if (dest)
atomic_dec(&dest->refcnt);
if (!cp) {
*
* Changes:
*
+ * Description of forwarding methods:
+ * - all transmitters are called from LOCAL_IN (remote clients) and
+ * LOCAL_OUT (local clients) but for ICMP can be called from FORWARD
+ * - not all connections have destination server, for example,
+ * connections in backup server when fwmark is used
+ * - bypass connections use daddr from packet
+ * LOCAL_OUT rules:
+ * - skb->dev is NULL, skb->protocol is not set (both are set in POST_ROUTING)
+ * - skb->pkt_type is not set yet
+ * - the only place where we can see skb->sk != NULL
*/
#define KMSG_COMPONENT "IPVS"
#include <net/route.h> /* for ip_route_output */
#include <net/ipv6.h>
#include <net/ip6_route.h>
+#include <net/addrconf.h>
#include <linux/icmpv6.h>
#include <linux/netfilter.h>
-#include <net/netfilter/nf_conntrack.h>
#include <linux/netfilter_ipv4.h>
#include <net/ip_vs.h>
* Destination cache to speed up outgoing route lookup
*/
static inline void
-__ip_vs_dst_set(struct ip_vs_dest *dest, u32 rtos, struct dst_entry *dst)
+__ip_vs_dst_set(struct ip_vs_dest *dest, u32 rtos, struct dst_entry *dst,
+ u32 dst_cookie)
{
struct dst_entry *old_dst;
old_dst = dest->dst_cache;
dest->dst_cache = dst;
dest->dst_rtos = rtos;
+ dest->dst_cookie = dst_cookie;
dst_release(old_dst);
}
static inline struct dst_entry *
-__ip_vs_dst_check(struct ip_vs_dest *dest, u32 rtos, u32 cookie)
+__ip_vs_dst_check(struct ip_vs_dest *dest, u32 rtos)
{
struct dst_entry *dst = dest->dst_cache;
if (!dst)
return NULL;
- if ((dst->obsolete
- || (dest->af == AF_INET && rtos != dest->dst_rtos)) &&
- dst->ops->check(dst, cookie) == NULL) {
+ if ((dst->obsolete || rtos != dest->dst_rtos) &&
+ dst->ops->check(dst, dest->dst_cookie) == NULL) {
dest->dst_cache = NULL;
dst_release(dst);
return NULL;
return dst;
}
+/*
+ * Get route to destination or remote server
+ * rt_mode: flags, &1=Allow local dest, &2=Allow non-local dest,
+ * &4=Allow redirect from remote daddr to local
+ */
static struct rtable *
-__ip_vs_get_out_rt(struct ip_vs_conn *cp, u32 rtos)
+__ip_vs_get_out_rt(struct sk_buff *skb, struct ip_vs_dest *dest,
+ __be32 daddr, u32 rtos, int rt_mode)
{
+ struct net *net = dev_net(skb_dst(skb)->dev);
struct rtable *rt; /* Route to the other host */
- struct ip_vs_dest *dest = cp->dest;
+ struct rtable *ort; /* Original route */
+ int local;
if (dest) {
spin_lock(&dest->dst_lock);
if (!(rt = (struct rtable *)
- __ip_vs_dst_check(dest, rtos, 0))) {
+ __ip_vs_dst_check(dest, rtos))) {
struct flowi fl = {
.oif = 0,
.nl_u = {
.tos = rtos, } },
};
- if (ip_route_output_key(&init_net, &rt, &fl)) {
+ if (ip_route_output_key(net, &rt, &fl)) {
spin_unlock(&dest->dst_lock);
IP_VS_DBG_RL("ip_route_output error, dest: %pI4\n",
&dest->addr.ip);
return NULL;
}
- __ip_vs_dst_set(dest, rtos, dst_clone(&rt->dst));
+ __ip_vs_dst_set(dest, rtos, dst_clone(&rt->dst), 0);
IP_VS_DBG(10, "new dst %pI4, refcnt=%d, rtos=%X\n",
&dest->addr.ip,
atomic_read(&rt->dst.__refcnt), rtos);
.oif = 0,
.nl_u = {
.ip4_u = {
- .daddr = cp->daddr.ip,
+ .daddr = daddr,
.saddr = 0,
.tos = rtos, } },
};
- if (ip_route_output_key(&init_net, &rt, &fl)) {
+ if (ip_route_output_key(net, &rt, &fl)) {
IP_VS_DBG_RL("ip_route_output error, dest: %pI4\n",
- &cp->daddr.ip);
+ &daddr);
return NULL;
}
}
+ local = rt->rt_flags & RTCF_LOCAL;
+ if (!((local ? 1 : 2) & rt_mode)) {
+ IP_VS_DBG_RL("Stopping traffic to %s address, dest: %pI4\n",
+ (rt->rt_flags & RTCF_LOCAL) ?
+ "local":"non-local", &rt->rt_dst);
+ ip_rt_put(rt);
+ return NULL;
+ }
+ if (local && !(rt_mode & 4) && !((ort = skb_rtable(skb)) &&
+ ort->rt_flags & RTCF_LOCAL)) {
+ IP_VS_DBG_RL("Redirect from non-local address %pI4 to local "
+ "requires NAT method, dest: %pI4\n",
+ &ip_hdr(skb)->daddr, &rt->rt_dst);
+ ip_rt_put(rt);
+ return NULL;
+ }
+ if (unlikely(!local && ipv4_is_loopback(ip_hdr(skb)->saddr))) {
+ IP_VS_DBG_RL("Stopping traffic from loopback address %pI4 "
+ "to non-local address, dest: %pI4\n",
+ &ip_hdr(skb)->saddr, &rt->rt_dst);
+ ip_rt_put(rt);
+ return NULL;
+ }
+
return rt;
}
+/* Reroute packet to local IPv4 stack after DNAT */
+static int
+__ip_vs_reroute_locally(struct sk_buff *skb)
+{
+ struct rtable *rt = skb_rtable(skb);
+ struct net_device *dev = rt->dst.dev;
+ struct net *net = dev_net(dev);
+ struct iphdr *iph = ip_hdr(skb);
+
+ if (rt->fl.iif) {
+ unsigned long orefdst = skb->_skb_refdst;
+
+ if (ip_route_input(skb, iph->daddr, iph->saddr,
+ iph->tos, skb->dev))
+ return 0;
+ refdst_drop(orefdst);
+ } else {
+ struct flowi fl = {
+ .oif = 0,
+ .nl_u = {
+ .ip4_u = {
+ .daddr = iph->daddr,
+ .saddr = iph->saddr,
+ .tos = RT_TOS(iph->tos),
+ }
+ },
+ .mark = skb->mark,
+ };
+ struct rtable *rt;
+
+ if (ip_route_output_key(net, &rt, &fl))
+ return 0;
+ if (!(rt->rt_flags & RTCF_LOCAL)) {
+ ip_rt_put(rt);
+ return 0;
+ }
+ /* Drop old route. */
+ skb_dst_drop(skb);
+ skb_dst_set(skb, &rt->dst);
+ }
+ return 1;
+}
+
#ifdef CONFIG_IP_VS_IPV6
+
+static inline int __ip_vs_is_local_route6(struct rt6_info *rt)
+{
+ return rt->rt6i_dev && rt->rt6i_dev->flags & IFF_LOOPBACK;
+}
+
+static struct dst_entry *
+__ip_vs_route_output_v6(struct net *net, struct in6_addr *daddr,
+ struct in6_addr *ret_saddr, int do_xfrm)
+{
+ struct dst_entry *dst;
+ struct flowi fl = {
+ .oif = 0,
+ .nl_u = {
+ .ip6_u = {
+ .daddr = *daddr,
+ },
+ },
+ };
+
+ dst = ip6_route_output(net, NULL, &fl);
+ if (dst->error)
+ goto out_err;
+ if (!ret_saddr)
+ return dst;
+ if (ipv6_addr_any(&fl.fl6_src) &&
+ ipv6_dev_get_saddr(net, ip6_dst_idev(dst)->dev,
+ &fl.fl6_dst, 0, &fl.fl6_src) < 0)
+ goto out_err;
+ if (do_xfrm && xfrm_lookup(net, &dst, &fl, NULL, 0) < 0)
+ goto out_err;
+ ipv6_addr_copy(ret_saddr, &fl.fl6_src);
+ return dst;
+
+out_err:
+ dst_release(dst);
+ IP_VS_DBG_RL("ip6_route_output error, dest: %pI6\n", daddr);
+ return NULL;
+}
+
+/*
+ * Get route to destination or remote server
+ * rt_mode: flags, &1=Allow local dest, &2=Allow non-local dest,
+ * &4=Allow redirect from remote daddr to local
+ */
static struct rt6_info *
-__ip_vs_get_out_rt_v6(struct ip_vs_conn *cp)
+__ip_vs_get_out_rt_v6(struct sk_buff *skb, struct ip_vs_dest *dest,
+ struct in6_addr *daddr, struct in6_addr *ret_saddr,
+ int do_xfrm, int rt_mode)
{
+ struct net *net = dev_net(skb_dst(skb)->dev);
struct rt6_info *rt; /* Route to the other host */
- struct ip_vs_dest *dest = cp->dest;
+ struct rt6_info *ort; /* Original route */
+ struct dst_entry *dst;
+ int local;
if (dest) {
spin_lock(&dest->dst_lock);
- rt = (struct rt6_info *)__ip_vs_dst_check(dest, 0, 0);
+ rt = (struct rt6_info *)__ip_vs_dst_check(dest, 0);
if (!rt) {
- struct flowi fl = {
- .oif = 0,
- .nl_u = {
- .ip6_u = {
- .daddr = dest->addr.in6,
- .saddr = {
- .s6_addr32 =
- { 0, 0, 0, 0 },
- },
- },
- },
- };
+ u32 cookie;
- rt = (struct rt6_info *)ip6_route_output(&init_net,
- NULL, &fl);
- if (!rt) {
+ dst = __ip_vs_route_output_v6(net, &dest->addr.in6,
+ &dest->dst_saddr,
+ do_xfrm);
+ if (!dst) {
spin_unlock(&dest->dst_lock);
- IP_VS_DBG_RL("ip6_route_output error, dest: %pI6\n",
- &dest->addr.in6);
return NULL;
}
- __ip_vs_dst_set(dest, 0, dst_clone(&rt->dst));
- IP_VS_DBG(10, "new dst %pI6, refcnt=%d\n",
- &dest->addr.in6,
+ rt = (struct rt6_info *) dst;
+ cookie = rt->rt6i_node ? rt->rt6i_node->fn_sernum : 0;
+ __ip_vs_dst_set(dest, 0, dst_clone(&rt->dst), cookie);
+ IP_VS_DBG(10, "new dst %pI6, src %pI6, refcnt=%d\n",
+ &dest->addr.in6, &dest->dst_saddr,
atomic_read(&rt->dst.__refcnt));
}
+ if (ret_saddr)
+ ipv6_addr_copy(ret_saddr, &dest->dst_saddr);
spin_unlock(&dest->dst_lock);
} else {
- struct flowi fl = {
- .oif = 0,
- .nl_u = {
- .ip6_u = {
- .daddr = cp->daddr.in6,
- .saddr = {
- .s6_addr32 = { 0, 0, 0, 0 },
- },
- },
- },
- };
-
- rt = (struct rt6_info *)ip6_route_output(&init_net, NULL, &fl);
- if (!rt) {
- IP_VS_DBG_RL("ip6_route_output error, dest: %pI6\n",
- &cp->daddr.in6);
+ dst = __ip_vs_route_output_v6(net, daddr, ret_saddr, do_xfrm);
+ if (!dst)
return NULL;
- }
+ rt = (struct rt6_info *) dst;
+ }
+
+ local = __ip_vs_is_local_route6(rt);
+ if (!((local ? 1 : 2) & rt_mode)) {
+ IP_VS_DBG_RL("Stopping traffic to %s address, dest: %pI6\n",
+ local ? "local":"non-local", daddr);
+ dst_release(&rt->dst);
+ return NULL;
+ }
+ if (local && !(rt_mode & 4) &&
+ !((ort = (struct rt6_info *) skb_dst(skb)) &&
+ __ip_vs_is_local_route6(ort))) {
+ IP_VS_DBG_RL("Redirect from non-local address %pI6 to local "
+ "requires NAT method, dest: %pI6\n",
+ &ipv6_hdr(skb)->daddr, daddr);
+ dst_release(&rt->dst);
+ return NULL;
+ }
+ if (unlikely(!local && (!skb->dev || skb->dev->flags & IFF_LOOPBACK) &&
+ ipv6_addr_type(&ipv6_hdr(skb)->saddr) &
+ IPV6_ADDR_LOOPBACK)) {
+ IP_VS_DBG_RL("Stopping traffic from loopback address %pI6 "
+ "to non-local address, dest: %pI6\n",
+ &ipv6_hdr(skb)->saddr, daddr);
+ dst_release(&rt->dst);
+ return NULL;
}
return rt;
dst_release(old_dst);
}
-#define IP_VS_XMIT(pf, skb, rt) \
+#define IP_VS_XMIT_TUNNEL(skb, cp) \
+({ \
+ int __ret = NF_ACCEPT; \
+ \
+ (skb)->ipvs_property = 1; \
+ if (unlikely((cp)->flags & IP_VS_CONN_F_NFCT)) \
+ __ret = ip_vs_confirm_conntrack(skb, cp); \
+ if (__ret == NF_ACCEPT) { \
+ nf_reset(skb); \
+ skb_forward_csum(skb); \
+ } \
+ __ret; \
+})
+
+#define IP_VS_XMIT_NAT(pf, skb, cp, local) \
+do { \
+ (skb)->ipvs_property = 1; \
+ if (likely(!((cp)->flags & IP_VS_CONN_F_NFCT))) \
+ ip_vs_notrack(skb); \
+ else \
+ ip_vs_update_conntrack(skb, cp, 1); \
+ if (local) \
+ return NF_ACCEPT; \
+ skb_forward_csum(skb); \
+ NF_HOOK(pf, NF_INET_LOCAL_OUT, (skb), NULL, \
+ skb_dst(skb)->dev, dst_output); \
+} while (0)
+
+#define IP_VS_XMIT(pf, skb, cp, local) \
do { \
(skb)->ipvs_property = 1; \
+ if (likely(!((cp)->flags & IP_VS_CONN_F_NFCT))) \
+ ip_vs_notrack(skb); \
+ if (local) \
+ return NF_ACCEPT; \
skb_forward_csum(skb); \
NF_HOOK(pf, NF_INET_LOCAL_OUT, (skb), NULL, \
- (rt)->dst.dev, dst_output); \
+ skb_dst(skb)->dev, dst_output); \
} while (0)
struct ip_vs_protocol *pp)
{
/* we do not touch skb and do not need pskb ptr */
- return NF_ACCEPT;
+ IP_VS_XMIT(NFPROTO_IPV4, skb, cp, 1);
}
{
struct rtable *rt; /* Route to the other host */
struct iphdr *iph = ip_hdr(skb);
- u8 tos = iph->tos;
int mtu;
- struct flowi fl = {
- .oif = 0,
- .nl_u = {
- .ip4_u = {
- .daddr = iph->daddr,
- .saddr = 0,
- .tos = RT_TOS(tos), } },
- };
EnterFunction(10);
- if (ip_route_output_key(&init_net, &rt, &fl)) {
- IP_VS_DBG_RL("%s(): ip_route_output error, dest: %pI4\n",
- __func__, &iph->daddr);
+ if (!(rt = __ip_vs_get_out_rt(skb, NULL, iph->daddr,
+ RT_TOS(iph->tos), 2)))
goto tx_error_icmp;
- }
/* MTU checking */
mtu = dst_mtu(&rt->dst);
/* Another hack: avoid icmp_send in ip_fragment */
skb->local_df = 1;
- IP_VS_XMIT(NFPROTO_IPV4, skb, rt);
+ IP_VS_XMIT(NFPROTO_IPV4, skb, cp, 0);
LeaveFunction(10);
return NF_STOLEN;
struct rt6_info *rt; /* Route to the other host */
struct ipv6hdr *iph = ipv6_hdr(skb);
int mtu;
- struct flowi fl = {
- .oif = 0,
- .nl_u = {
- .ip6_u = {
- .daddr = iph->daddr,
- .saddr = { .s6_addr32 = {0, 0, 0, 0} }, } },
- };
EnterFunction(10);
- rt = (struct rt6_info *)ip6_route_output(&init_net, NULL, &fl);
- if (!rt) {
- IP_VS_DBG_RL("%s(): ip6_route_output error, dest: %pI6\n",
- __func__, &iph->daddr);
+ if (!(rt = __ip_vs_get_out_rt_v6(skb, NULL, &iph->daddr, NULL, 0, 2)))
goto tx_error_icmp;
- }
/* MTU checking */
mtu = dst_mtu(&rt->dst);
if (skb->len > mtu) {
- dst_release(&rt->dst);
+ if (!skb->dev) {
+ struct net *net = dev_net(skb_dst(skb)->dev);
+
+ skb->dev = net->loopback_dev;
+ }
icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu);
+ dst_release(&rt->dst);
IP_VS_DBG_RL("%s(): frag needed\n", __func__);
goto tx_error;
}
/* Another hack: avoid icmp_send in ip_fragment */
skb->local_df = 1;
- IP_VS_XMIT(NFPROTO_IPV6, skb, rt);
+ IP_VS_XMIT(NFPROTO_IPV6, skb, cp, 0);
LeaveFunction(10);
return NF_STOLEN;
}
#endif
-void
-ip_vs_update_conntrack(struct sk_buff *skb, struct ip_vs_conn *cp, int outin)
-{
- struct nf_conn *ct = (struct nf_conn *)skb->nfct;
- struct nf_conntrack_tuple new_tuple;
-
- if (ct == NULL || nf_ct_is_untracked(ct) || nf_ct_is_confirmed(ct))
- return;
-
- /*
- * The connection is not yet in the hashtable, so we update it.
- * CIP->VIP will remain the same, so leave the tuple in
- * IP_CT_DIR_ORIGINAL untouched. When the reply comes back from the
- * real-server we will see RIP->DIP.
- */
- new_tuple = ct->tuplehash[IP_CT_DIR_REPLY].tuple;
- if (outin)
- new_tuple.src.u3 = cp->daddr;
- else
- new_tuple.dst.u3 = cp->vaddr;
- /*
- * This will also take care of UDP and other protocols.
- */
- if (outin)
- new_tuple.src.u.tcp.port = cp->dport;
- else
- new_tuple.dst.u.tcp.port = cp->vport;
- nf_conntrack_alter_reply(ct, &new_tuple);
-}
-
/*
* NAT transmitter (only for outside-to-inside nat forwarding)
* Not used for related ICMP
struct rtable *rt; /* Route to the other host */
int mtu;
struct iphdr *iph = ip_hdr(skb);
+ int local;
EnterFunction(10);
IP_VS_DBG(10, "filled cport=%d\n", ntohs(*p));
}
- if (!(rt = __ip_vs_get_out_rt(cp, RT_TOS(iph->tos))))
+ if (!(rt = __ip_vs_get_out_rt(skb, cp->dest, cp->daddr.ip,
+ RT_TOS(iph->tos), 1|2|4)))
goto tx_error_icmp;
+ local = rt->rt_flags & RTCF_LOCAL;
+ /*
+ * Avoid duplicate tuple in reply direction for NAT traffic
+ * to local address when connection is sync-ed
+ */
+#if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
+ if (cp->flags & IP_VS_CONN_F_SYNC && local) {
+ enum ip_conntrack_info ctinfo;
+ struct nf_conn *ct = ct = nf_ct_get(skb, &ctinfo);
+
+ if (ct && !nf_ct_is_untracked(ct)) {
+ IP_VS_DBG_RL_PKT(10, AF_INET, pp, skb, 0,
+ "ip_vs_nat_xmit(): "
+ "stopping DNAT to local address");
+ goto tx_error_put;
+ }
+ }
+#endif
+
+ /* From world but DNAT to loopback address? */
+ if (local && ipv4_is_loopback(rt->rt_dst) && skb_rtable(skb)->fl.iif) {
+ IP_VS_DBG_RL_PKT(1, AF_INET, pp, skb, 0, "ip_vs_nat_xmit(): "
+ "stopping DNAT to loopback address");
+ goto tx_error_put;
+ }
/* MTU checking */
mtu = dst_mtu(&rt->dst);
if ((skb->len > mtu) && (iph->frag_off & htons(IP_DF))) {
- ip_rt_put(rt);
icmp_send(skb, ICMP_DEST_UNREACH,ICMP_FRAG_NEEDED, htonl(mtu));
- IP_VS_DBG_RL_PKT(0, pp, skb, 0, "ip_vs_nat_xmit(): frag needed for");
- goto tx_error;
+ IP_VS_DBG_RL_PKT(0, AF_INET, pp, skb, 0,
+ "ip_vs_nat_xmit(): frag needed for");
+ goto tx_error_put;
}
/* copy-on-write the packet before mangling it */
if (skb_cow(skb, rt->dst.dev->hard_header_len))
goto tx_error_put;
- /* drop old route */
- skb_dst_drop(skb);
- skb_dst_set(skb, &rt->dst);
-
/* mangle the packet */
if (pp->dnat_handler && !pp->dnat_handler(skb, pp, cp))
- goto tx_error;
+ goto tx_error_put;
ip_hdr(skb)->daddr = cp->daddr.ip;
ip_send_check(ip_hdr(skb));
- IP_VS_DBG_PKT(10, pp, skb, 0, "After DNAT");
+ if (!local) {
+ /* drop old route */
+ skb_dst_drop(skb);
+ skb_dst_set(skb, &rt->dst);
+ } else {
+ ip_rt_put(rt);
+ /*
+ * Some IPv4 replies get local address from routes,
+ * not from iph, so while we DNAT after routing
+ * we need this second input/output route.
+ */
+ if (!__ip_vs_reroute_locally(skb))
+ goto tx_error;
+ }
- ip_vs_update_conntrack(skb, cp, 1);
+ IP_VS_DBG_PKT(10, AF_INET, pp, skb, 0, "After DNAT");
/* FIXME: when application helper enlarges the packet and the length
is larger than the MTU of outgoing device, there will be still
/* Another hack: avoid icmp_send in ip_fragment */
skb->local_df = 1;
- IP_VS_XMIT(NFPROTO_IPV4, skb, rt);
+ IP_VS_XMIT_NAT(NFPROTO_IPV4, skb, cp, local);
LeaveFunction(10);
return NF_STOLEN;
tx_error_icmp:
dst_link_failure(skb);
tx_error:
- LeaveFunction(10);
kfree_skb(skb);
+ LeaveFunction(10);
return NF_STOLEN;
tx_error_put:
ip_rt_put(rt);
{
struct rt6_info *rt; /* Route to the other host */
int mtu;
+ int local;
EnterFunction(10);
IP_VS_DBG(10, "filled cport=%d\n", ntohs(*p));
}
- rt = __ip_vs_get_out_rt_v6(cp);
- if (!rt)
+ if (!(rt = __ip_vs_get_out_rt_v6(skb, cp->dest, &cp->daddr.in6, NULL,
+ 0, 1|2|4)))
goto tx_error_icmp;
+ local = __ip_vs_is_local_route6(rt);
+ /*
+ * Avoid duplicate tuple in reply direction for NAT traffic
+ * to local address when connection is sync-ed
+ */
+#if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
+ if (cp->flags & IP_VS_CONN_F_SYNC && local) {
+ enum ip_conntrack_info ctinfo;
+ struct nf_conn *ct = ct = nf_ct_get(skb, &ctinfo);
+
+ if (ct && !nf_ct_is_untracked(ct)) {
+ IP_VS_DBG_RL_PKT(10, AF_INET6, pp, skb, 0,
+ "ip_vs_nat_xmit_v6(): "
+ "stopping DNAT to local address");
+ goto tx_error_put;
+ }
+ }
+#endif
+
+ /* From world but DNAT to loopback address? */
+ if (local && skb->dev && !(skb->dev->flags & IFF_LOOPBACK) &&
+ ipv6_addr_type(&rt->rt6i_dst.addr) & IPV6_ADDR_LOOPBACK) {
+ IP_VS_DBG_RL_PKT(1, AF_INET6, pp, skb, 0,
+ "ip_vs_nat_xmit_v6(): "
+ "stopping DNAT to loopback address");
+ goto tx_error_put;
+ }
/* MTU checking */
mtu = dst_mtu(&rt->dst);
if (skb->len > mtu) {
- dst_release(&rt->dst);
+ if (!skb->dev) {
+ struct net *net = dev_net(skb_dst(skb)->dev);
+
+ skb->dev = net->loopback_dev;
+ }
icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu);
- IP_VS_DBG_RL_PKT(0, pp, skb, 0,
+ IP_VS_DBG_RL_PKT(0, AF_INET6, pp, skb, 0,
"ip_vs_nat_xmit_v6(): frag needed for");
- goto tx_error;
+ goto tx_error_put;
}
/* copy-on-write the packet before mangling it */
if (skb_cow(skb, rt->dst.dev->hard_header_len))
goto tx_error_put;
- /* drop old route */
- skb_dst_drop(skb);
- skb_dst_set(skb, &rt->dst);
-
/* mangle the packet */
if (pp->dnat_handler && !pp->dnat_handler(skb, pp, cp))
goto tx_error;
- ipv6_hdr(skb)->daddr = cp->daddr.in6;
+ ipv6_addr_copy(&ipv6_hdr(skb)->daddr, &cp->daddr.in6);
- IP_VS_DBG_PKT(10, pp, skb, 0, "After DNAT");
+ if (!local || !skb->dev) {
+ /* drop the old route when skb is not shared */
+ skb_dst_drop(skb);
+ skb_dst_set(skb, &rt->dst);
+ } else {
+ /* destined to loopback, do we need to change route? */
+ dst_release(&rt->dst);
+ }
- ip_vs_update_conntrack(skb, cp, 1);
+ IP_VS_DBG_PKT(10, AF_INET6, pp, skb, 0, "After DNAT");
/* FIXME: when application helper enlarges the packet and the length
is larger than the MTU of outgoing device, there will be still
/* Another hack: avoid icmp_send in ip_fragment */
skb->local_df = 1;
- IP_VS_XMIT(NFPROTO_IPV6, skb, rt);
+ IP_VS_XMIT_NAT(NFPROTO_IPV6, skb, cp, local);
LeaveFunction(10);
return NF_STOLEN;
struct iphdr *old_iph = ip_hdr(skb);
u8 tos = old_iph->tos;
__be16 df = old_iph->frag_off;
- sk_buff_data_t old_transport_header = skb->transport_header;
struct iphdr *iph; /* Our new IP header */
unsigned int max_headroom; /* The extra header space needed */
int mtu;
+ int ret;
EnterFunction(10);
- if (skb->protocol != htons(ETH_P_IP)) {
- IP_VS_DBG_RL("%s(): protocol error, "
- "ETH_P_IP: %d, skb protocol: %d\n",
- __func__, htons(ETH_P_IP), skb->protocol);
- goto tx_error;
- }
-
- if (!(rt = __ip_vs_get_out_rt(cp, RT_TOS(tos))))
+ if (!(rt = __ip_vs_get_out_rt(skb, cp->dest, cp->daddr.ip,
+ RT_TOS(tos), 1|2)))
goto tx_error_icmp;
+ if (rt->rt_flags & RTCF_LOCAL) {
+ ip_rt_put(rt);
+ IP_VS_XMIT(NFPROTO_IPV4, skb, cp, 1);
+ }
tdev = rt->dst.dev;
mtu = dst_mtu(&rt->dst) - sizeof(struct iphdr);
if (mtu < 68) {
- ip_rt_put(rt);
IP_VS_DBG_RL("%s(): mtu less than 68\n", __func__);
- goto tx_error;
+ goto tx_error_put;
}
if (skb_dst(skb))
skb_dst(skb)->ops->update_pmtu(skb_dst(skb), mtu);
if ((old_iph->frag_off & htons(IP_DF))
&& mtu < ntohs(old_iph->tot_len)) {
icmp_send(skb, ICMP_DEST_UNREACH,ICMP_FRAG_NEEDED, htonl(mtu));
- ip_rt_put(rt);
IP_VS_DBG_RL("%s(): frag needed\n", __func__);
- goto tx_error;
+ goto tx_error_put;
}
/*
old_iph = ip_hdr(skb);
}
- skb->transport_header = old_transport_header;
+ skb->transport_header = skb->network_header;
/* fix old IP header checksum */
ip_send_check(old_iph);
/* Another hack: avoid icmp_send in ip_fragment */
skb->local_df = 1;
- ip_local_out(skb);
+ ret = IP_VS_XMIT_TUNNEL(skb, cp);
+ if (ret == NF_ACCEPT)
+ ip_local_out(skb);
+ else if (ret == NF_DROP)
+ kfree_skb(skb);
LeaveFunction(10);
kfree_skb(skb);
LeaveFunction(10);
return NF_STOLEN;
+tx_error_put:
+ ip_rt_put(rt);
+ goto tx_error;
}
#ifdef CONFIG_IP_VS_IPV6
struct ip_vs_protocol *pp)
{
struct rt6_info *rt; /* Route to the other host */
+ struct in6_addr saddr; /* Source for tunnel */
struct net_device *tdev; /* Device to other host */
struct ipv6hdr *old_iph = ipv6_hdr(skb);
- sk_buff_data_t old_transport_header = skb->transport_header;
struct ipv6hdr *iph; /* Our new IP header */
unsigned int max_headroom; /* The extra header space needed */
int mtu;
+ int ret;
EnterFunction(10);
- if (skb->protocol != htons(ETH_P_IPV6)) {
- IP_VS_DBG_RL("%s(): protocol error, "
- "ETH_P_IPV6: %d, skb protocol: %d\n",
- __func__, htons(ETH_P_IPV6), skb->protocol);
- goto tx_error;
- }
-
- rt = __ip_vs_get_out_rt_v6(cp);
- if (!rt)
+ if (!(rt = __ip_vs_get_out_rt_v6(skb, cp->dest, &cp->daddr.in6,
+ &saddr, 1, 1|2)))
goto tx_error_icmp;
+ if (__ip_vs_is_local_route6(rt)) {
+ dst_release(&rt->dst);
+ IP_VS_XMIT(NFPROTO_IPV6, skb, cp, 1);
+ }
tdev = rt->dst.dev;
mtu = dst_mtu(&rt->dst) - sizeof(struct ipv6hdr);
- /* TODO IPv6: do we need this check in IPv6? */
- if (mtu < 1280) {
- dst_release(&rt->dst);
- IP_VS_DBG_RL("%s(): mtu less than 1280\n", __func__);
- goto tx_error;
+ if (mtu < IPV6_MIN_MTU) {
+ IP_VS_DBG_RL("%s(): mtu less than %d\n", __func__,
+ IPV6_MIN_MTU);
+ goto tx_error_put;
}
if (skb_dst(skb))
skb_dst(skb)->ops->update_pmtu(skb_dst(skb), mtu);
if (mtu < ntohs(old_iph->payload_len) + sizeof(struct ipv6hdr)) {
+ if (!skb->dev) {
+ struct net *net = dev_net(skb_dst(skb)->dev);
+
+ skb->dev = net->loopback_dev;
+ }
icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu);
- dst_release(&rt->dst);
IP_VS_DBG_RL("%s(): frag needed\n", __func__);
- goto tx_error;
+ goto tx_error_put;
}
/*
old_iph = ipv6_hdr(skb);
}
- skb->transport_header = old_transport_header;
+ skb->transport_header = skb->network_header;
skb_push(skb, sizeof(struct ipv6hdr));
skb_reset_network_header(skb);
be16_add_cpu(&iph->payload_len, sizeof(*old_iph));
iph->priority = old_iph->priority;
memset(&iph->flow_lbl, 0, sizeof(iph->flow_lbl));
- iph->daddr = rt->rt6i_dst.addr;
- iph->saddr = cp->vaddr.in6; /* rt->rt6i_src.addr; */
+ ipv6_addr_copy(&iph->daddr, &cp->daddr.in6);
+ ipv6_addr_copy(&iph->saddr, &saddr);
iph->hop_limit = old_iph->hop_limit;
/* Another hack: avoid icmp_send in ip_fragment */
skb->local_df = 1;
- ip6_local_out(skb);
+ ret = IP_VS_XMIT_TUNNEL(skb, cp);
+ if (ret == NF_ACCEPT)
+ ip6_local_out(skb);
+ else if (ret == NF_DROP)
+ kfree_skb(skb);
LeaveFunction(10);
kfree_skb(skb);
LeaveFunction(10);
return NF_STOLEN;
+tx_error_put:
+ dst_release(&rt->dst);
+ goto tx_error;
}
#endif
EnterFunction(10);
- if (!(rt = __ip_vs_get_out_rt(cp, RT_TOS(iph->tos))))
+ if (!(rt = __ip_vs_get_out_rt(skb, cp->dest, cp->daddr.ip,
+ RT_TOS(iph->tos), 1|2)))
goto tx_error_icmp;
+ if (rt->rt_flags & RTCF_LOCAL) {
+ ip_rt_put(rt);
+ IP_VS_XMIT(NFPROTO_IPV4, skb, cp, 1);
+ }
/* MTU checking */
mtu = dst_mtu(&rt->dst);
/* Another hack: avoid icmp_send in ip_fragment */
skb->local_df = 1;
- IP_VS_XMIT(NFPROTO_IPV4, skb, rt);
+ IP_VS_XMIT(NFPROTO_IPV4, skb, cp, 0);
LeaveFunction(10);
return NF_STOLEN;
EnterFunction(10);
- rt = __ip_vs_get_out_rt_v6(cp);
- if (!rt)
+ if (!(rt = __ip_vs_get_out_rt_v6(skb, cp->dest, &cp->daddr.in6, NULL,
+ 0, 1|2)))
goto tx_error_icmp;
+ if (__ip_vs_is_local_route6(rt)) {
+ dst_release(&rt->dst);
+ IP_VS_XMIT(NFPROTO_IPV6, skb, cp, 1);
+ }
/* MTU checking */
mtu = dst_mtu(&rt->dst);
if (skb->len > mtu) {
+ if (!skb->dev) {
+ struct net *net = dev_net(skb_dst(skb)->dev);
+
+ skb->dev = net->loopback_dev;
+ }
icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu);
dst_release(&rt->dst);
IP_VS_DBG_RL("%s(): frag needed\n", __func__);
/* Another hack: avoid icmp_send in ip_fragment */
skb->local_df = 1;
- IP_VS_XMIT(NFPROTO_IPV6, skb, rt);
+ IP_VS_XMIT(NFPROTO_IPV6, skb, cp, 0);
LeaveFunction(10);
return NF_STOLEN;
struct rtable *rt; /* Route to the other host */
int mtu;
int rc;
+ int local;
EnterFunction(10);
* mangle and send the packet here (only for VS/NAT)
*/
- if (!(rt = __ip_vs_get_out_rt(cp, RT_TOS(ip_hdr(skb)->tos))))
+ if (!(rt = __ip_vs_get_out_rt(skb, cp->dest, cp->daddr.ip,
+ RT_TOS(ip_hdr(skb)->tos), 1|2|4)))
goto tx_error_icmp;
+ local = rt->rt_flags & RTCF_LOCAL;
+
+ /*
+ * Avoid duplicate tuple in reply direction for NAT traffic
+ * to local address when connection is sync-ed
+ */
+#if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
+ if (cp->flags & IP_VS_CONN_F_SYNC && local) {
+ enum ip_conntrack_info ctinfo;
+ struct nf_conn *ct = ct = nf_ct_get(skb, &ctinfo);
+
+ if (ct && !nf_ct_is_untracked(ct)) {
+ IP_VS_DBG(10, "%s(): "
+ "stopping DNAT to local address %pI4\n",
+ __func__, &cp->daddr.ip);
+ goto tx_error_put;
+ }
+ }
+#endif
+
+ /* From world but DNAT to loopback address? */
+ if (local && ipv4_is_loopback(rt->rt_dst) && skb_rtable(skb)->fl.iif) {
+ IP_VS_DBG(1, "%s(): "
+ "stopping DNAT to loopback %pI4\n",
+ __func__, &cp->daddr.ip);
+ goto tx_error_put;
+ }
/* MTU checking */
mtu = dst_mtu(&rt->dst);
if ((skb->len > mtu) && (ip_hdr(skb)->frag_off & htons(IP_DF))) {
- ip_rt_put(rt);
icmp_send(skb, ICMP_DEST_UNREACH, ICMP_FRAG_NEEDED, htonl(mtu));
IP_VS_DBG_RL("%s(): frag needed\n", __func__);
- goto tx_error;
+ goto tx_error_put;
}
/* copy-on-write the packet before mangling it */
if (skb_cow(skb, rt->dst.dev->hard_header_len))
goto tx_error_put;
- /* drop the old route when skb is not shared */
- skb_dst_drop(skb);
- skb_dst_set(skb, &rt->dst);
-
ip_vs_nat_icmp(skb, pp, cp, 0);
+ if (!local) {
+ /* drop the old route when skb is not shared */
+ skb_dst_drop(skb);
+ skb_dst_set(skb, &rt->dst);
+ } else {
+ ip_rt_put(rt);
+ /*
+ * Some IPv4 replies get local address from routes,
+ * not from iph, so while we DNAT after routing
+ * we need this second input/output route.
+ */
+ if (!__ip_vs_reroute_locally(skb))
+ goto tx_error;
+ }
+
/* Another hack: avoid icmp_send in ip_fragment */
skb->local_df = 1;
- IP_VS_XMIT(NFPROTO_IPV4, skb, rt);
+ IP_VS_XMIT_NAT(NFPROTO_IPV4, skb, cp, local);
rc = NF_STOLEN;
goto out;
struct rt6_info *rt; /* Route to the other host */
int mtu;
int rc;
+ int local;
EnterFunction(10);
* mangle and send the packet here (only for VS/NAT)
*/
- rt = __ip_vs_get_out_rt_v6(cp);
- if (!rt)
+ if (!(rt = __ip_vs_get_out_rt_v6(skb, cp->dest, &cp->daddr.in6, NULL,
+ 0, 1|2|4)))
goto tx_error_icmp;
+ local = __ip_vs_is_local_route6(rt);
+ /*
+ * Avoid duplicate tuple in reply direction for NAT traffic
+ * to local address when connection is sync-ed
+ */
+#if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
+ if (cp->flags & IP_VS_CONN_F_SYNC && local) {
+ enum ip_conntrack_info ctinfo;
+ struct nf_conn *ct = ct = nf_ct_get(skb, &ctinfo);
+
+ if (ct && !nf_ct_is_untracked(ct)) {
+ IP_VS_DBG(10, "%s(): "
+ "stopping DNAT to local address %pI6\n",
+ __func__, &cp->daddr.in6);
+ goto tx_error_put;
+ }
+ }
+#endif
+
+ /* From world but DNAT to loopback address? */
+ if (local && skb->dev && !(skb->dev->flags & IFF_LOOPBACK) &&
+ ipv6_addr_type(&rt->rt6i_dst.addr) & IPV6_ADDR_LOOPBACK) {
+ IP_VS_DBG(1, "%s(): "
+ "stopping DNAT to loopback %pI6\n",
+ __func__, &cp->daddr.in6);
+ goto tx_error_put;
+ }
+
/* MTU checking */
mtu = dst_mtu(&rt->dst);
if (skb->len > mtu) {
- dst_release(&rt->dst);
+ if (!skb->dev) {
+ struct net *net = dev_net(skb_dst(skb)->dev);
+
+ skb->dev = net->loopback_dev;
+ }
icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu);
IP_VS_DBG_RL("%s(): frag needed\n", __func__);
- goto tx_error;
+ goto tx_error_put;
}
/* copy-on-write the packet before mangling it */
if (skb_cow(skb, rt->dst.dev->hard_header_len))
goto tx_error_put;
- /* drop the old route when skb is not shared */
- skb_dst_drop(skb);
- skb_dst_set(skb, &rt->dst);
-
ip_vs_nat_icmp_v6(skb, pp, cp, 0);
+ if (!local || !skb->dev) {
+ /* drop the old route when skb is not shared */
+ skb_dst_drop(skb);
+ skb_dst_set(skb, &rt->dst);
+ } else {
+ /* destined to loopback, do we need to change route? */
+ dst_release(&rt->dst);
+ }
+
/* Another hack: avoid icmp_send in ip_fragment */
skb->local_df = 1;
- IP_VS_XMIT(NFPROTO_IPV6, skb, rt);
+ IP_VS_XMIT_NAT(NFPROTO_IPV6, skb, cp, local);
rc = NF_STOLEN;
goto out;
DEFINE_PER_CPU(struct nf_conn, nf_conntrack_untracked);
EXPORT_PER_CPU_SYMBOL(nf_conntrack_untracked);
-static int nf_conntrack_hash_rnd_initted;
-static unsigned int nf_conntrack_hash_rnd;
+static unsigned int nf_conntrack_hash_rnd __read_mostly;
-static u_int32_t __hash_conntrack(const struct nf_conntrack_tuple *tuple,
- u16 zone, unsigned int size, unsigned int rnd)
+static u32 hash_conntrack_raw(const struct nf_conntrack_tuple *tuple, u16 zone)
{
unsigned int n;
- u_int32_t h;
/* The direction must be ignored, so we hash everything up to the
* destination ports (which is a multiple of 4) and treat the last
* three bytes manually.
*/
n = (sizeof(tuple->src) + sizeof(tuple->dst.u3)) / sizeof(u32);
- h = jhash2((u32 *)tuple, n,
- zone ^ rnd ^ (((__force __u16)tuple->dst.u.all << 16) |
- tuple->dst.protonum));
+ return jhash2((u32 *)tuple, n, zone ^ nf_conntrack_hash_rnd ^
+ (((__force __u16)tuple->dst.u.all << 16) |
+ tuple->dst.protonum));
+}
+
+static u32 __hash_bucket(u32 hash, unsigned int size)
+{
+ return ((u64)hash * size) >> 32;
+}
+
+static u32 hash_bucket(u32 hash, const struct net *net)
+{
+ return __hash_bucket(hash, net->ct.htable_size);
+}
- return ((u64)h * size) >> 32;
+static u_int32_t __hash_conntrack(const struct nf_conntrack_tuple *tuple,
+ u16 zone, unsigned int size)
+{
+ return __hash_bucket(hash_conntrack_raw(tuple, zone), size);
}
static inline u_int32_t hash_conntrack(const struct net *net, u16 zone,
const struct nf_conntrack_tuple *tuple)
{
- return __hash_conntrack(tuple, zone, net->ct.htable_size,
- nf_conntrack_hash_rnd);
+ return __hash_conntrack(tuple, zone, net->ct.htable_size);
}
bool
* OR
* - Caller must lock nf_conntrack_lock before calling this function
*/
-struct nf_conntrack_tuple_hash *
-__nf_conntrack_find(struct net *net, u16 zone,
- const struct nf_conntrack_tuple *tuple)
+static struct nf_conntrack_tuple_hash *
+____nf_conntrack_find(struct net *net, u16 zone,
+ const struct nf_conntrack_tuple *tuple, u32 hash)
{
struct nf_conntrack_tuple_hash *h;
struct hlist_nulls_node *n;
- unsigned int hash = hash_conntrack(net, zone, tuple);
+ unsigned int bucket = hash_bucket(hash, net);
/* Disable BHs the entire time since we normally need to disable them
* at least once for the stats anyway.
*/
local_bh_disable();
begin:
- hlist_nulls_for_each_entry_rcu(h, n, &net->ct.hash[hash], hnnode) {
+ hlist_nulls_for_each_entry_rcu(h, n, &net->ct.hash[bucket], hnnode) {
if (nf_ct_tuple_equal(tuple, &h->tuple) &&
nf_ct_zone(nf_ct_tuplehash_to_ctrack(h)) == zone) {
NF_CT_STAT_INC(net, found);
* not the expected one, we must restart lookup.
* We probably met an item that was moved to another chain.
*/
- if (get_nulls_value(n) != hash) {
+ if (get_nulls_value(n) != bucket) {
NF_CT_STAT_INC(net, search_restart);
goto begin;
}
return NULL;
}
+
+struct nf_conntrack_tuple_hash *
+__nf_conntrack_find(struct net *net, u16 zone,
+ const struct nf_conntrack_tuple *tuple)
+{
+ return ____nf_conntrack_find(net, zone, tuple,
+ hash_conntrack_raw(tuple, zone));
+}
EXPORT_SYMBOL_GPL(__nf_conntrack_find);
/* Find a connection corresponding to a tuple. */
-struct nf_conntrack_tuple_hash *
-nf_conntrack_find_get(struct net *net, u16 zone,
- const struct nf_conntrack_tuple *tuple)
+static struct nf_conntrack_tuple_hash *
+__nf_conntrack_find_get(struct net *net, u16 zone,
+ const struct nf_conntrack_tuple *tuple, u32 hash)
{
struct nf_conntrack_tuple_hash *h;
struct nf_conn *ct;
rcu_read_lock();
begin:
- h = __nf_conntrack_find(net, zone, tuple);
+ h = ____nf_conntrack_find(net, zone, tuple, hash);
if (h) {
ct = nf_ct_tuplehash_to_ctrack(h);
if (unlikely(nf_ct_is_dying(ct) ||
return h;
}
+
+struct nf_conntrack_tuple_hash *
+nf_conntrack_find_get(struct net *net, u16 zone,
+ const struct nf_conntrack_tuple *tuple)
+{
+ return __nf_conntrack_find_get(net, zone, tuple,
+ hash_conntrack_raw(tuple, zone));
+}
EXPORT_SYMBOL_GPL(nf_conntrack_find_get);
static void __nf_conntrack_hash_insert(struct nf_conn *ct,
return NF_ACCEPT;
zone = nf_ct_zone(ct);
- hash = hash_conntrack(net, zone, &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple);
- repl_hash = hash_conntrack(net, zone, &ct->tuplehash[IP_CT_DIR_REPLY].tuple);
+ /* reuse the hash saved before */
+ hash = *(unsigned long *)&ct->tuplehash[IP_CT_DIR_REPLY].hnnode.pprev;
+ hash = hash_bucket(hash, net);
+ repl_hash = hash_conntrack(net, zone,
+ &ct->tuplehash[IP_CT_DIR_REPLY].tuple);
/* We're not in hash table, and we refuse to set up related
connections for unconfirmed conns. But packet copies and
return dropped;
}
-struct nf_conn *nf_conntrack_alloc(struct net *net, u16 zone,
- const struct nf_conntrack_tuple *orig,
- const struct nf_conntrack_tuple *repl,
- gfp_t gfp)
+static struct nf_conn *
+__nf_conntrack_alloc(struct net *net, u16 zone,
+ const struct nf_conntrack_tuple *orig,
+ const struct nf_conntrack_tuple *repl,
+ gfp_t gfp, u32 hash)
{
struct nf_conn *ct;
- if (unlikely(!nf_conntrack_hash_rnd_initted)) {
- get_random_bytes(&nf_conntrack_hash_rnd,
- sizeof(nf_conntrack_hash_rnd));
- nf_conntrack_hash_rnd_initted = 1;
+ if (unlikely(!nf_conntrack_hash_rnd)) {
+ unsigned int rand;
+
+ /*
+ * Why not initialize nf_conntrack_rnd in a "init()" function ?
+ * Because there isn't enough entropy when system initializing,
+ * and we initialize it as late as possible.
+ */
+ do {
+ get_random_bytes(&rand, sizeof(rand));
+ } while (!rand);
+ cmpxchg(&nf_conntrack_hash_rnd, 0, rand);
+
+ /* recompute the hash as nf_conntrack_hash_rnd is initialized */
+ hash = hash_conntrack_raw(orig, zone);
}
/* We don't want any race condition at early drop stage */
if (nf_conntrack_max &&
unlikely(atomic_read(&net->ct.count) > nf_conntrack_max)) {
- unsigned int hash = hash_conntrack(net, zone, orig);
- if (!early_drop(net, hash)) {
+ if (!early_drop(net, hash_bucket(hash, net))) {
atomic_dec(&net->ct.count);
if (net_ratelimit())
printk(KERN_WARNING
ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple = *orig;
ct->tuplehash[IP_CT_DIR_ORIGINAL].hnnode.pprev = NULL;
ct->tuplehash[IP_CT_DIR_REPLY].tuple = *repl;
- ct->tuplehash[IP_CT_DIR_REPLY].hnnode.pprev = NULL;
+ /* save hash for reusing when confirming */
+ *(unsigned long *)(&ct->tuplehash[IP_CT_DIR_REPLY].hnnode.pprev) = hash;
/* Don't set timer yet: wait for confirmation */
setup_timer(&ct->timeout, death_by_timeout, (unsigned long)ct);
write_pnet(&ct->ct_net, net);
return ERR_PTR(-ENOMEM);
#endif
}
+
+struct nf_conn *nf_conntrack_alloc(struct net *net, u16 zone,
+ const struct nf_conntrack_tuple *orig,
+ const struct nf_conntrack_tuple *repl,
+ gfp_t gfp)
+{
+ return __nf_conntrack_alloc(net, zone, orig, repl, gfp, 0);
+}
EXPORT_SYMBOL_GPL(nf_conntrack_alloc);
void nf_conntrack_free(struct nf_conn *ct)
struct nf_conntrack_l3proto *l3proto,
struct nf_conntrack_l4proto *l4proto,
struct sk_buff *skb,
- unsigned int dataoff)
+ unsigned int dataoff, u32 hash)
{
struct nf_conn *ct;
struct nf_conn_help *help;
return NULL;
}
- ct = nf_conntrack_alloc(net, zone, tuple, &repl_tuple, GFP_ATOMIC);
+ ct = __nf_conntrack_alloc(net, zone, tuple, &repl_tuple, GFP_ATOMIC,
+ hash);
if (IS_ERR(ct)) {
pr_debug("Can't allocate conntrack.\n");
return (struct nf_conntrack_tuple_hash *)ct;
struct nf_conntrack_tuple_hash *h;
struct nf_conn *ct;
u16 zone = tmpl ? nf_ct_zone(tmpl) : NF_CT_DEFAULT_ZONE;
+ u32 hash;
if (!nf_ct_get_tuple(skb, skb_network_offset(skb),
dataoff, l3num, protonum, &tuple, l3proto,
}
/* look for tuple match */
- h = nf_conntrack_find_get(net, zone, &tuple);
+ hash = hash_conntrack_raw(&tuple, zone);
+ h = __nf_conntrack_find_get(net, zone, &tuple, hash);
if (!h) {
h = init_conntrack(net, tmpl, &tuple, l3proto, l4proto,
- skb, dataoff);
+ skb, dataoff, hash);
if (!h)
return NULL;
if (IS_ERR(h))
ct = nf_ct_tuplehash_to_ctrack(h);
hlist_nulls_del_rcu(&h->hnnode);
bucket = __hash_conntrack(&h->tuple, nf_ct_zone(ct),
- hashsize,
- nf_conntrack_hash_rnd);
+ hashsize);
hlist_nulls_add_head_rcu(&h->hnnode, &hash[bucket]);
}
}
static struct kmem_cache *nf_ct_expect_cachep __read_mostly;
+static HLIST_HEAD(nf_ct_userspace_expect_list);
+
/* nf_conntrack_expect helper functions */
-void nf_ct_unlink_expect(struct nf_conntrack_expect *exp)
+void nf_ct_unlink_expect_report(struct nf_conntrack_expect *exp,
+ u32 pid, int report)
{
struct nf_conn_help *master_help = nfct_help(exp->master);
struct net *net = nf_ct_exp_net(exp);
- NF_CT_ASSERT(master_help);
NF_CT_ASSERT(!timer_pending(&exp->timeout));
hlist_del_rcu(&exp->hnode);
net->ct.expect_count--;
hlist_del(&exp->lnode);
- master_help->expecting[exp->class]--;
+ if (!(exp->flags & NF_CT_EXPECT_USERSPACE))
+ master_help->expecting[exp->class]--;
+
+ nf_ct_expect_event_report(IPEXP_DESTROY, exp, pid, report);
nf_ct_expect_put(exp);
NF_CT_STAT_INC(net, expect_delete);
}
-EXPORT_SYMBOL_GPL(nf_ct_unlink_expect);
+EXPORT_SYMBOL_GPL(nf_ct_unlink_expect_report);
static void nf_ct_expectation_timed_out(unsigned long ul_expect)
{
atomic_inc(&exp->use);
- hlist_add_head(&exp->lnode, &master_help->expectations);
- master_help->expecting[exp->class]++;
+ if (master_help) {
+ hlist_add_head(&exp->lnode, &master_help->expectations);
+ master_help->expecting[exp->class]++;
+ } else if (exp->flags & NF_CT_EXPECT_USERSPACE)
+ hlist_add_head(&exp->lnode, &nf_ct_userspace_expect_list);
hlist_add_head_rcu(&exp->hnode, &net->ct.expect_hash[h]);
net->ct.expect_count++;
setup_timer(&exp->timeout, nf_ct_expectation_timed_out,
(unsigned long)exp);
- p = &master_help->helper->expect_policy[exp->class];
- exp->timeout.expires = jiffies + p->timeout * HZ;
+ if (master_help) {
+ p = &master_help->helper->expect_policy[exp->class];
+ exp->timeout.expires = jiffies + p->timeout * HZ;
+ }
add_timer(&exp->timeout);
atomic_inc(&exp->use);
unsigned int h;
int ret = 1;
- if (!master_help->helper) {
+ /* Don't allow expectations created from kernel-space with no helper */
+ if (!(expect->flags & NF_CT_EXPECT_USERSPACE) &&
+ (!master_help || (master_help && !master_help->helper))) {
ret = -ESHUTDOWN;
goto out;
}
}
}
/* Will be over limit? */
- p = &master_help->helper->expect_policy[expect->class];
- if (p->max_expected &&
- master_help->expecting[expect->class] >= p->max_expected) {
- evict_oldest_expect(master, expect);
- if (master_help->expecting[expect->class] >= p->max_expected) {
- ret = -EMFILE;
- goto out;
+ if (master_help) {
+ p = &master_help->helper->expect_policy[expect->class];
+ if (p->max_expected &&
+ master_help->expecting[expect->class] >= p->max_expected) {
+ evict_oldest_expect(master, expect);
+ if (master_help->expecting[expect->class]
+ >= p->max_expected) {
+ ret = -EMFILE;
+ goto out;
+ }
}
}
}
EXPORT_SYMBOL_GPL(nf_ct_expect_related_report);
+void nf_ct_remove_userspace_expectations(void)
+{
+ struct nf_conntrack_expect *exp;
+ struct hlist_node *n, *next;
+
+ hlist_for_each_entry_safe(exp, n, next,
+ &nf_ct_userspace_expect_list, lnode) {
+ if (del_timer(&exp->timeout)) {
+ nf_ct_unlink_expect(exp);
+ nf_ct_expect_put(exp);
+ }
+ }
+}
+EXPORT_SYMBOL_GPL(nf_ct_remove_userspace_expectations);
+
#ifdef CONFIG_PROC_FS
struct ct_expect_iter_state {
struct seq_net_private p;
seq_printf(s, "PERMANENT");
delim = ",";
}
- if (expect->flags & NF_CT_EXPECT_INACTIVE)
+ if (expect->flags & NF_CT_EXPECT_INACTIVE) {
seq_printf(s, "%sINACTIVE", delim);
+ delim = ",";
+ }
+ if (expect->flags & NF_CT_EXPECT_USERSPACE)
+ seq_printf(s, "%sUSERSPACE", delim);
helper = rcu_dereference(nfct_help(expect->master)->helper);
if (helper) {
const struct nf_conntrack_expect *exp)
{
struct nf_conn *master = exp->master;
- struct nf_conntrack_helper *helper;
long timeout = (exp->timeout.expires - jiffies) / HZ;
+ struct nf_conn_help *help;
if (timeout < 0)
timeout = 0;
NLA_PUT_BE32(skb, CTA_EXPECT_TIMEOUT, htonl(timeout));
NLA_PUT_BE32(skb, CTA_EXPECT_ID, htonl((unsigned long)exp));
- helper = rcu_dereference(nfct_help(master)->helper);
- if (helper)
- NLA_PUT_STRING(skb, CTA_EXPECT_HELP_NAME, helper->name);
+ NLA_PUT_BE32(skb, CTA_EXPECT_FLAGS, htonl(exp->flags));
+ help = nfct_help(master);
+ if (help) {
+ struct nf_conntrack_helper *helper;
+
+ helper = rcu_dereference(help->helper);
+ if (helper)
+ NLA_PUT_STRING(skb, CTA_EXPECT_HELP_NAME, helper->name);
+ }
return 0;
struct nlmsghdr *nlh;
struct nfgenmsg *nfmsg;
struct sk_buff *skb;
- unsigned int type;
+ unsigned int type, group;
int flags = 0;
- if (events & (1 << IPEXP_NEW)) {
+ if (events & (1 << IPEXP_DESTROY)) {
+ type = IPCTNL_MSG_EXP_DELETE;
+ group = NFNLGRP_CONNTRACK_EXP_DESTROY;
+ } else if (events & (1 << IPEXP_NEW)) {
type = IPCTNL_MSG_EXP_NEW;
flags = NLM_F_CREATE|NLM_F_EXCL;
+ group = NFNLGRP_CONNTRACK_EXP_NEW;
} else
return 0;
- if (!item->report &&
- !nfnetlink_has_listeners(net, NFNLGRP_CONNTRACK_EXP_NEW))
+ if (!item->report && !nfnetlink_has_listeners(net, group))
return 0;
skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
rcu_read_unlock();
nlmsg_end(skb, nlh);
- nfnetlink_send(skb, net, item->pid, NFNLGRP_CONNTRACK_EXP_NEW,
- item->report, GFP_ATOMIC);
+ nfnetlink_send(skb, net, item->pid, group, item->report, GFP_ATOMIC);
return 0;
nla_put_failure:
[CTA_EXPECT_TIMEOUT] = { .type = NLA_U32 },
[CTA_EXPECT_ID] = { .type = NLA_U32 },
[CTA_EXPECT_HELP_NAME] = { .type = NLA_NUL_STRING },
+ [CTA_EXPECT_ZONE] = { .type = NLA_U16 },
+ [CTA_EXPECT_FLAGS] = { .type = NLA_U32 },
};
static int
}
/* after list removal, usage count == 1 */
- nf_ct_unexpect_related(exp);
+ spin_lock_bh(&nf_conntrack_lock);
+ if (del_timer(&exp->timeout)) {
+ nf_ct_unlink_expect_report(exp, NETLINK_CB(skb).pid,
+ nlmsg_report(nlh));
+ nf_ct_expect_put(exp);
+ }
+ spin_unlock_bh(&nf_conntrack_lock);
/* have to put what we 'get' above.
* after this line usage count == 0 */
nf_ct_expect_put(exp);
m_help = nfct_help(exp->master);
if (!strcmp(m_help->helper->name, name) &&
del_timer(&exp->timeout)) {
- nf_ct_unlink_expect(exp);
+ nf_ct_unlink_expect_report(exp,
+ NETLINK_CB(skb).pid,
+ nlmsg_report(nlh));
nf_ct_expect_put(exp);
}
}
&net->ct.expect_hash[i],
hnode) {
if (del_timer(&exp->timeout)) {
- nf_ct_unlink_expect(exp);
+ nf_ct_unlink_expect_report(exp,
+ NETLINK_CB(skb).pid,
+ nlmsg_report(nlh));
nf_ct_expect_put(exp);
}
}
if (!h)
return -ENOENT;
ct = nf_ct_tuplehash_to_ctrack(h);
- help = nfct_help(ct);
-
- if (!help || !help->helper) {
- /* such conntrack hasn't got any helper, abort */
- err = -EOPNOTSUPP;
- goto out;
- }
-
exp = nf_ct_expect_alloc(ct);
if (!exp) {
err = -ENOMEM;
goto out;
}
+ help = nfct_help(ct);
+ if (!help) {
+ if (!cda[CTA_EXPECT_TIMEOUT]) {
+ err = -EINVAL;
+ goto out;
+ }
+ exp->timeout.expires =
+ jiffies + ntohl(nla_get_be32(cda[CTA_EXPECT_TIMEOUT])) * HZ;
+
+ exp->flags = NF_CT_EXPECT_USERSPACE;
+ if (cda[CTA_EXPECT_FLAGS]) {
+ exp->flags |=
+ ntohl(nla_get_be32(cda[CTA_EXPECT_FLAGS]));
+ }
+ } else {
+ if (cda[CTA_EXPECT_FLAGS]) {
+ exp->flags = ntohl(nla_get_be32(cda[CTA_EXPECT_FLAGS]));
+ exp->flags &= ~NF_CT_EXPECT_USERSPACE;
+ } else
+ exp->flags = 0;
+ }
exp->class = 0;
exp->expectfn = NULL;
- exp->flags = 0;
exp->master = ct;
exp->helper = NULL;
memcpy(&exp->tuple, &tuple, sizeof(struct nf_conntrack_tuple));
{
pr_info("ctnetlink: unregistering from nfnetlink.\n");
+ nf_ct_remove_userspace_expectations();
#ifdef CONFIG_NF_CONNTRACK_EVENTS
nf_ct_expect_unregister_notifier(&ctnl_notifier_exp);
nf_conntrack_unregister_notifier(&ctnl_notifier);
return len;
}
+static int iswordc(const char c)
+{
+ if (isalnum(c) || c == '!' || c == '"' || c == '%' ||
+ (c >= '(' && c <= '/') || c == ':' || c == '<' || c == '>' ||
+ c == '?' || (c >= '[' && c <= ']') || c == '_' || c == '`' ||
+ c == '{' || c == '}' || c == '~')
+ return 1;
+ return 0;
+}
+
+static int word_len(const char *dptr, const char *limit)
+{
+ int len = 0;
+ while (dptr < limit && iswordc(*dptr)) {
+ dptr++;
+ len++;
+ }
+ return len;
+}
+
+static int callid_len(const struct nf_conn *ct, const char *dptr,
+ const char *limit, int *shift)
+{
+ int len, domain_len;
+
+ len = word_len(dptr, limit);
+ dptr += len;
+ if (!len || dptr == limit || *dptr != '@')
+ return len;
+ dptr++;
+ len++;
+
+ domain_len = word_len(dptr, limit);
+ if (!domain_len)
+ return 0;
+ return len + domain_len;
+}
+
/* get media type + port length */
static int media_len(const struct nf_conn *ct, const char *dptr,
const char *limit, int *shift)
const char *end;
int ret = 0;
+ if (!ct)
+ return 0;
+
memset(addr, 0, sizeof(*addr));
switch (nf_ct_l3num(ct)) {
case AF_INET:
[SIP_HDR_VIA_TCP] = SIP_HDR("Via", "v", "TCP ", epaddr_len),
[SIP_HDR_EXPIRES] = SIP_HDR("Expires", NULL, NULL, digits_len),
[SIP_HDR_CONTENT_LENGTH] = SIP_HDR("Content-Length", "l", NULL, digits_len),
+ [SIP_HDR_CALL_ID] = SIP_HDR("Call-Id", "i", NULL, callid_len),
};
static const char *sip_follow_continuation(const char *dptr, const char *limit)
#include <net/udp.h>
#include <net/netfilter/nf_tproxy_core.h>
-struct sock *
-nf_tproxy_get_sock_v4(struct net *net, const u8 protocol,
- const __be32 saddr, const __be32 daddr,
- const __be16 sport, const __be16 dport,
- const struct net_device *in, bool listening_only)
-{
- struct sock *sk;
-
- /* look up socket */
- switch (protocol) {
- case IPPROTO_TCP:
- if (listening_only)
- sk = __inet_lookup_listener(net, &tcp_hashinfo,
- daddr, ntohs(dport),
- in->ifindex);
- else
- sk = __inet_lookup(net, &tcp_hashinfo,
- saddr, sport, daddr, dport,
- in->ifindex);
- break;
- case IPPROTO_UDP:
- sk = udp4_lib_lookup(net, saddr, sport, daddr, dport,
- in->ifindex);
- break;
- default:
- WARN_ON(1);
- sk = NULL;
- }
-
- pr_debug("tproxy socket lookup: proto %u %08x:%u -> %08x:%u, listener only: %d, sock %p\n",
- protocol, ntohl(saddr), ntohs(sport), ntohl(daddr), ntohs(dport), listening_only, sk);
-
- return sk;
-}
-EXPORT_SYMBOL_GPL(nf_tproxy_get_sock_v4);
static void
nf_tproxy_destructor(struct sk_buff *skb)
void
xt_unregister_targets(struct xt_target *target, unsigned int n)
{
- unsigned int i;
-
- for (i = 0; i < n; i++)
- xt_unregister_target(&target[i]);
+ while (n-- > 0)
+ xt_unregister_target(&target[n]);
}
EXPORT_SYMBOL(xt_unregister_targets);
void
xt_unregister_matches(struct xt_match *match, unsigned int n)
{
- unsigned int i;
-
- for (i = 0; i < n; i++)
- xt_unregister_match(&match[i]);
+ while (n-- > 0)
+ xt_unregister_match(&match[n]);
}
EXPORT_SYMBOL(xt_unregister_matches);
/*
* Transparent proxy support for Linux/iptables
*
- * Copyright (c) 2006-2007 BalaBit IT Ltd.
+ * Copyright (c) 2006-2010 BalaBit IT Ltd.
* Author: Balazs Scheidler, Krisztian Kovacs
*
* This program is free software; you can redistribute it and/or modify
#include <net/checksum.h>
#include <net/udp.h>
#include <net/inet_sock.h>
-
+#include <linux/inetdevice.h>
#include <linux/netfilter/x_tables.h>
#include <linux/netfilter_ipv4/ip_tables.h>
-#include <linux/netfilter/xt_TPROXY.h>
#include <net/netfilter/ipv4/nf_defrag_ipv4.h>
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+#include <net/if_inet6.h>
+#include <net/addrconf.h>
+#include <linux/netfilter_ipv6/ip6_tables.h>
+#include <net/netfilter/ipv6/nf_defrag_ipv6.h>
+#endif
+
#include <net/netfilter/nf_tproxy_core.h>
+#include <linux/netfilter/xt_TPROXY.h>
+
+static inline __be32
+tproxy_laddr4(struct sk_buff *skb, __be32 user_laddr, __be32 daddr)
+{
+ struct in_device *indev;
+ __be32 laddr;
+
+ if (user_laddr)
+ return user_laddr;
+
+ laddr = 0;
+ rcu_read_lock();
+ indev = __in_dev_get_rcu(skb->dev);
+ for_primary_ifa(indev) {
+ laddr = ifa->ifa_local;
+ break;
+ } endfor_ifa(indev);
+ rcu_read_unlock();
+
+ return laddr ? laddr : daddr;
+}
+
+/**
+ * tproxy_handle_time_wait4() - handle IPv4 TCP TIME_WAIT reopen redirections
+ * @skb: The skb being processed.
+ * @laddr: IPv4 address to redirect to or zero.
+ * @lport: TCP port to redirect to or zero.
+ * @sk: The TIME_WAIT TCP socket found by the lookup.
+ *
+ * We have to handle SYN packets arriving to TIME_WAIT sockets
+ * differently: instead of reopening the connection we should rather
+ * redirect the new connection to the proxy if there's a listener
+ * socket present.
+ *
+ * tproxy_handle_time_wait4() consumes the socket reference passed in.
+ *
+ * Returns the listener socket if there's one, the TIME_WAIT socket if
+ * no such listener is found, or NULL if the TCP header is incomplete.
+ */
+static struct sock *
+tproxy_handle_time_wait4(struct sk_buff *skb, __be32 laddr, __be16 lport,
+ struct sock *sk)
+{
+ const struct iphdr *iph = ip_hdr(skb);
+ struct tcphdr _hdr, *hp;
+
+ hp = skb_header_pointer(skb, ip_hdrlen(skb), sizeof(_hdr), &_hdr);
+ if (hp == NULL) {
+ inet_twsk_put(inet_twsk(sk));
+ return NULL;
+ }
+
+ if (hp->syn && !hp->rst && !hp->ack && !hp->fin) {
+ /* SYN to a TIME_WAIT socket, we'd rather redirect it
+ * to a listener socket if there's one */
+ struct sock *sk2;
+
+ sk2 = nf_tproxy_get_sock_v4(dev_net(skb->dev), iph->protocol,
+ iph->saddr, laddr ? laddr : iph->daddr,
+ hp->source, lport ? lport : hp->dest,
+ skb->dev, NFT_LOOKUP_LISTENER);
+ if (sk2) {
+ inet_twsk_deschedule(inet_twsk(sk), &tcp_death_row);
+ inet_twsk_put(inet_twsk(sk));
+ sk = sk2;
+ }
+ }
+
+ return sk;
+}
static unsigned int
-tproxy_tg(struct sk_buff *skb, const struct xt_action_param *par)
+tproxy_tg4(struct sk_buff *skb, __be32 laddr, __be16 lport,
+ u_int32_t mark_mask, u_int32_t mark_value)
{
const struct iphdr *iph = ip_hdr(skb);
- const struct xt_tproxy_target_info *tgi = par->targinfo;
struct udphdr _hdr, *hp;
struct sock *sk;
if (hp == NULL)
return NF_DROP;
+ /* check if there's an ongoing connection on the packet
+ * addresses, this happens if the redirect already happened
+ * and the current packet belongs to an already established
+ * connection */
sk = nf_tproxy_get_sock_v4(dev_net(skb->dev), iph->protocol,
- iph->saddr,
- tgi->laddr ? tgi->laddr : iph->daddr,
- hp->source,
- tgi->lport ? tgi->lport : hp->dest,
- par->in, true);
+ iph->saddr, iph->daddr,
+ hp->source, hp->dest,
+ skb->dev, NFT_LOOKUP_ESTABLISHED);
+
+ laddr = tproxy_laddr4(skb, laddr, iph->daddr);
+ if (!lport)
+ lport = hp->dest;
+
+ /* UDP has no TCP_TIME_WAIT state, so we never enter here */
+ if (sk && sk->sk_state == TCP_TIME_WAIT)
+ /* reopening a TIME_WAIT connection needs special handling */
+ sk = tproxy_handle_time_wait4(skb, laddr, lport, sk);
+ else if (!sk)
+ /* no, there's no established connection, check if
+ * there's a listener on the redirected addr/port */
+ sk = nf_tproxy_get_sock_v4(dev_net(skb->dev), iph->protocol,
+ iph->saddr, laddr,
+ hp->source, lport,
+ skb->dev, NFT_LOOKUP_LISTENER);
+
+ /* NOTE: assign_sock consumes our sk reference */
+ if (sk && nf_tproxy_assign_sock(skb, sk)) {
+ /* This should be in a separate target, but we don't do multiple
+ targets on the same rule yet */
+ skb->mark = (skb->mark & ~mark_mask) ^ mark_value;
+
+ pr_debug("redirecting: proto %hhu %pI4:%hu -> %pI4:%hu, mark: %x\n",
+ iph->protocol, &iph->daddr, ntohs(hp->dest),
+ &laddr, ntohs(lport), skb->mark);
+ return NF_ACCEPT;
+ }
+
+ pr_debug("no socket, dropping: proto %hhu %pI4:%hu -> %pI4:%hu, mark: %x\n",
+ iph->protocol, &iph->saddr, ntohs(hp->source),
+ &iph->daddr, ntohs(hp->dest), skb->mark);
+ return NF_DROP;
+}
+
+static unsigned int
+tproxy_tg4_v0(struct sk_buff *skb, const struct xt_action_param *par)
+{
+ const struct xt_tproxy_target_info *tgi = par->targinfo;
+
+ return tproxy_tg4(skb, tgi->laddr, tgi->lport, tgi->mark_mask, tgi->mark_value);
+}
+
+static unsigned int
+tproxy_tg4_v1(struct sk_buff *skb, const struct xt_action_param *par)
+{
+ const struct xt_tproxy_target_info_v1 *tgi = par->targinfo;
+
+ return tproxy_tg4(skb, tgi->laddr.ip, tgi->lport, tgi->mark_mask, tgi->mark_value);
+}
+
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+
+static inline const struct in6_addr *
+tproxy_laddr6(struct sk_buff *skb, const struct in6_addr *user_laddr,
+ const struct in6_addr *daddr)
+{
+ struct inet6_dev *indev;
+ struct inet6_ifaddr *ifa;
+ struct in6_addr *laddr;
+
+ if (!ipv6_addr_any(user_laddr))
+ return user_laddr;
+ laddr = NULL;
+
+ rcu_read_lock();
+ indev = __in6_dev_get(skb->dev);
+ if (indev)
+ list_for_each_entry(ifa, &indev->addr_list, if_list) {
+ if (ifa->flags & (IFA_F_TENTATIVE | IFA_F_DEPRECATED))
+ continue;
+
+ laddr = &ifa->addr;
+ break;
+ }
+ rcu_read_unlock();
+
+ return laddr ? laddr : daddr;
+}
+
+/**
+ * tproxy_handle_time_wait6() - handle IPv6 TCP TIME_WAIT reopen redirections
+ * @skb: The skb being processed.
+ * @tproto: Transport protocol.
+ * @thoff: Transport protocol header offset.
+ * @par: Iptables target parameters.
+ * @sk: The TIME_WAIT TCP socket found by the lookup.
+ *
+ * We have to handle SYN packets arriving to TIME_WAIT sockets
+ * differently: instead of reopening the connection we should rather
+ * redirect the new connection to the proxy if there's a listener
+ * socket present.
+ *
+ * tproxy_handle_time_wait6() consumes the socket reference passed in.
+ *
+ * Returns the listener socket if there's one, the TIME_WAIT socket if
+ * no such listener is found, or NULL if the TCP header is incomplete.
+ */
+static struct sock *
+tproxy_handle_time_wait6(struct sk_buff *skb, int tproto, int thoff,
+ const struct xt_action_param *par,
+ struct sock *sk)
+{
+ const struct ipv6hdr *iph = ipv6_hdr(skb);
+ struct tcphdr _hdr, *hp;
+ const struct xt_tproxy_target_info_v1 *tgi = par->targinfo;
+
+ hp = skb_header_pointer(skb, thoff, sizeof(_hdr), &_hdr);
+ if (hp == NULL) {
+ inet_twsk_put(inet_twsk(sk));
+ return NULL;
+ }
+
+ if (hp->syn && !hp->rst && !hp->ack && !hp->fin) {
+ /* SYN to a TIME_WAIT socket, we'd rather redirect it
+ * to a listener socket if there's one */
+ struct sock *sk2;
+
+ sk2 = nf_tproxy_get_sock_v6(dev_net(skb->dev), tproto,
+ &iph->saddr,
+ tproxy_laddr6(skb, &tgi->laddr.in6, &iph->daddr),
+ hp->source,
+ tgi->lport ? tgi->lport : hp->dest,
+ skb->dev, NFT_LOOKUP_LISTENER);
+ if (sk2) {
+ inet_twsk_deschedule(inet_twsk(sk), &tcp_death_row);
+ inet_twsk_put(inet_twsk(sk));
+ sk = sk2;
+ }
+ }
+
+ return sk;
+}
+
+static unsigned int
+tproxy_tg6_v1(struct sk_buff *skb, const struct xt_action_param *par)
+{
+ const struct ipv6hdr *iph = ipv6_hdr(skb);
+ const struct xt_tproxy_target_info_v1 *tgi = par->targinfo;
+ struct udphdr _hdr, *hp;
+ struct sock *sk;
+ const struct in6_addr *laddr;
+ __be16 lport;
+ int thoff;
+ int tproto;
+
+ tproto = ipv6_find_hdr(skb, &thoff, -1, NULL);
+ if (tproto < 0) {
+ pr_debug("unable to find transport header in IPv6 packet, dropping\n");
+ return NF_DROP;
+ }
+
+ hp = skb_header_pointer(skb, thoff, sizeof(_hdr), &_hdr);
+ if (hp == NULL) {
+ pr_debug("unable to grab transport header contents in IPv6 packet, dropping\n");
+ return NF_DROP;
+ }
+
+ /* check if there's an ongoing connection on the packet
+ * addresses, this happens if the redirect already happened
+ * and the current packet belongs to an already established
+ * connection */
+ sk = nf_tproxy_get_sock_v6(dev_net(skb->dev), tproto,
+ &iph->saddr, &iph->daddr,
+ hp->source, hp->dest,
+ par->in, NFT_LOOKUP_ESTABLISHED);
+
+ laddr = tproxy_laddr6(skb, &tgi->laddr.in6, &iph->daddr);
+ lport = tgi->lport ? tgi->lport : hp->dest;
+
+ /* UDP has no TCP_TIME_WAIT state, so we never enter here */
+ if (sk && sk->sk_state == TCP_TIME_WAIT)
+ /* reopening a TIME_WAIT connection needs special handling */
+ sk = tproxy_handle_time_wait6(skb, tproto, thoff, par, sk);
+ else if (!sk)
+ /* no there's no established connection, check if
+ * there's a listener on the redirected addr/port */
+ sk = nf_tproxy_get_sock_v6(dev_net(skb->dev), tproto,
+ &iph->saddr, laddr,
+ hp->source, lport,
+ par->in, NFT_LOOKUP_LISTENER);
/* NOTE: assign_sock consumes our sk reference */
if (sk && nf_tproxy_assign_sock(skb, sk)) {
targets on the same rule yet */
skb->mark = (skb->mark & ~tgi->mark_mask) ^ tgi->mark_value;
- pr_debug("redirecting: proto %u %08x:%u -> %08x:%u, mark: %x\n",
- iph->protocol, ntohl(iph->daddr), ntohs(hp->dest),
- ntohl(tgi->laddr), ntohs(tgi->lport), skb->mark);
+ pr_debug("redirecting: proto %hhu %pI6:%hu -> %pI6:%hu, mark: %x\n",
+ tproto, &iph->saddr, ntohs(hp->source),
+ laddr, ntohs(lport), skb->mark);
return NF_ACCEPT;
}
- pr_debug("no socket, dropping: proto %u %08x:%u -> %08x:%u, mark: %x\n",
- iph->protocol, ntohl(iph->daddr), ntohs(hp->dest),
- ntohl(tgi->laddr), ntohs(tgi->lport), skb->mark);
+ pr_debug("no socket, dropping: proto %hhu %pI6:%hu -> %pI6:%hu, mark: %x\n",
+ tproto, &iph->saddr, ntohs(hp->source),
+ &iph->daddr, ntohs(hp->dest), skb->mark);
+
return NF_DROP;
}
-static int tproxy_tg_check(const struct xt_tgchk_param *par)
+static int tproxy_tg6_check(const struct xt_tgchk_param *par)
+{
+ const struct ip6t_ip6 *i = par->entryinfo;
+
+ if ((i->proto == IPPROTO_TCP || i->proto == IPPROTO_UDP)
+ && !(i->flags & IP6T_INV_PROTO))
+ return 0;
+
+ pr_info("Can be used only in combination with "
+ "either -p tcp or -p udp\n");
+ return -EINVAL;
+}
+#endif
+
+static int tproxy_tg4_check(const struct xt_tgchk_param *par)
{
const struct ipt_ip *i = par->entryinfo;
return -EINVAL;
}
-static struct xt_target tproxy_tg_reg __read_mostly = {
- .name = "TPROXY",
- .family = AF_INET,
- .table = "mangle",
- .target = tproxy_tg,
- .targetsize = sizeof(struct xt_tproxy_target_info),
- .checkentry = tproxy_tg_check,
- .hooks = 1 << NF_INET_PRE_ROUTING,
- .me = THIS_MODULE,
+static struct xt_target tproxy_tg_reg[] __read_mostly = {
+ {
+ .name = "TPROXY",
+ .family = NFPROTO_IPV4,
+ .table = "mangle",
+ .target = tproxy_tg4_v0,
+ .revision = 0,
+ .targetsize = sizeof(struct xt_tproxy_target_info),
+ .checkentry = tproxy_tg4_check,
+ .hooks = 1 << NF_INET_PRE_ROUTING,
+ .me = THIS_MODULE,
+ },
+ {
+ .name = "TPROXY",
+ .family = NFPROTO_IPV4,
+ .table = "mangle",
+ .target = tproxy_tg4_v1,
+ .revision = 1,
+ .targetsize = sizeof(struct xt_tproxy_target_info_v1),
+ .checkentry = tproxy_tg4_check,
+ .hooks = 1 << NF_INET_PRE_ROUTING,
+ .me = THIS_MODULE,
+ },
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+ {
+ .name = "TPROXY",
+ .family = NFPROTO_IPV6,
+ .table = "mangle",
+ .target = tproxy_tg6_v1,
+ .revision = 1,
+ .targetsize = sizeof(struct xt_tproxy_target_info_v1),
+ .checkentry = tproxy_tg6_check,
+ .hooks = 1 << NF_INET_PRE_ROUTING,
+ .me = THIS_MODULE,
+ },
+#endif
+
};
static int __init tproxy_tg_init(void)
{
nf_defrag_ipv4_enable();
- return xt_register_target(&tproxy_tg_reg);
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+ nf_defrag_ipv6_enable();
+#endif
+
+ return xt_register_targets(tproxy_tg_reg, ARRAY_SIZE(tproxy_tg_reg));
}
static void __exit tproxy_tg_exit(void)
{
- xt_unregister_target(&tproxy_tg_reg);
+ xt_unregister_targets(tproxy_tg_reg, ARRAY_SIZE(tproxy_tg_reg));
}
module_init(tproxy_tg_init);
module_exit(tproxy_tg_exit);
MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Krisztian Kovacs");
+MODULE_AUTHOR("Balazs Scheidler, Krisztian Kovacs");
MODULE_DESCRIPTION("Netfilter transparent proxy (TPROXY) target module.");
MODULE_ALIAS("ipt_TPROXY");
+MODULE_ALIAS("ip6t_TPROXY");
#include <linux/ip_vs.h>
#include <linux/types.h>
#include <linux/netfilter/x_tables.h>
-#include <linux/netfilter/x_tables.h>
#include <linux/netfilter/xt_ipvs.h>
#include <net/netfilter/nf_conntrack.h>
#include <linux/skbuff.h>
#include <linux/netfilter/x_tables.h>
#include <linux/netfilter_ipv4/ip_tables.h>
+#include <linux/netfilter_ipv6/ip6_tables.h>
#include <net/tcp.h>
#include <net/udp.h>
#include <net/icmp.h>
#include <net/inet_sock.h>
#include <net/netfilter/nf_tproxy_core.h>
#include <net/netfilter/ipv4/nf_defrag_ipv4.h>
+#include <net/netfilter/ipv6/nf_defrag_ipv6.h>
#include <linux/netfilter/xt_socket.h>
#endif
static int
-extract_icmp_fields(const struct sk_buff *skb,
+extract_icmp4_fields(const struct sk_buff *skb,
u8 *protocol,
__be32 *raddr,
__be32 *laddr,
return 0;
}
-
static bool
socket_match(const struct sk_buff *skb, struct xt_action_param *par,
const struct xt_socket_mtinfo1 *info)
dport = hp->dest;
} else if (iph->protocol == IPPROTO_ICMP) {
- if (extract_icmp_fields(skb, &protocol, &saddr, &daddr,
+ if (extract_icmp4_fields(skb, &protocol, &saddr, &daddr,
&sport, &dport))
return false;
} else {
#endif
sk = nf_tproxy_get_sock_v4(dev_net(skb->dev), protocol,
- saddr, daddr, sport, dport, par->in, false);
+ saddr, daddr, sport, dport, par->in, NFT_LOOKUP_ANY);
if (sk != NULL) {
bool wildcard;
bool transparent = true;
sk = NULL;
}
- pr_debug("proto %u %08x:%u -> %08x:%u (orig %08x:%u) sock %p\n",
- protocol, ntohl(saddr), ntohs(sport),
- ntohl(daddr), ntohs(dport),
- ntohl(iph->daddr), hp ? ntohs(hp->dest) : 0, sk);
+ pr_debug("proto %hhu %pI4:%hu -> %pI4:%hu (orig %pI4:%hu) sock %p\n",
+ protocol, &saddr, ntohs(sport),
+ &daddr, ntohs(dport),
+ &iph->daddr, hp ? ntohs(hp->dest) : 0, sk);
return (sk != NULL);
}
static bool
-socket_mt_v0(const struct sk_buff *skb, struct xt_action_param *par)
+socket_mt4_v0(const struct sk_buff *skb, struct xt_action_param *par)
{
return socket_match(skb, par, NULL);
}
static bool
-socket_mt_v1(const struct sk_buff *skb, struct xt_action_param *par)
+socket_mt4_v1(const struct sk_buff *skb, struct xt_action_param *par)
{
return socket_match(skb, par, par->matchinfo);
}
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+
+static int
+extract_icmp6_fields(const struct sk_buff *skb,
+ unsigned int outside_hdrlen,
+ u8 *protocol,
+ struct in6_addr **raddr,
+ struct in6_addr **laddr,
+ __be16 *rport,
+ __be16 *lport)
+{
+ struct ipv6hdr *inside_iph, _inside_iph;
+ struct icmp6hdr *icmph, _icmph;
+ __be16 *ports, _ports[2];
+ u8 inside_nexthdr;
+ int inside_hdrlen;
+
+ icmph = skb_header_pointer(skb, outside_hdrlen,
+ sizeof(_icmph), &_icmph);
+ if (icmph == NULL)
+ return 1;
+
+ if (icmph->icmp6_type & ICMPV6_INFOMSG_MASK)
+ return 1;
+
+ inside_iph = skb_header_pointer(skb, outside_hdrlen + sizeof(_icmph), sizeof(_inside_iph), &_inside_iph);
+ if (inside_iph == NULL)
+ return 1;
+ inside_nexthdr = inside_iph->nexthdr;
+
+ inside_hdrlen = ipv6_skip_exthdr(skb, outside_hdrlen + sizeof(_icmph) + sizeof(_inside_iph), &inside_nexthdr);
+ if (inside_hdrlen < 0)
+ return 1; /* hjm: Packet has no/incomplete transport layer headers. */
+
+ if (inside_nexthdr != IPPROTO_TCP &&
+ inside_nexthdr != IPPROTO_UDP)
+ return 1;
+
+ ports = skb_header_pointer(skb, inside_hdrlen,
+ sizeof(_ports), &_ports);
+ if (ports == NULL)
+ return 1;
+
+ /* the inside IP packet is the one quoted from our side, thus
+ * its saddr is the local address */
+ *protocol = inside_nexthdr;
+ *laddr = &inside_iph->saddr;
+ *lport = ports[0];
+ *raddr = &inside_iph->daddr;
+ *rport = ports[1];
+
+ return 0;
+}
+
+static bool
+socket_mt6_v1(const struct sk_buff *skb, struct xt_action_param *par)
+{
+ struct ipv6hdr *iph = ipv6_hdr(skb);
+ struct udphdr _hdr, *hp = NULL;
+ struct sock *sk;
+ struct in6_addr *daddr, *saddr;
+ __be16 dport, sport;
+ int thoff;
+ u8 tproto;
+ const struct xt_socket_mtinfo1 *info = (struct xt_socket_mtinfo1 *) par->matchinfo;
+
+ tproto = ipv6_find_hdr(skb, &thoff, -1, NULL);
+ if (tproto < 0) {
+ pr_debug("unable to find transport header in IPv6 packet, dropping\n");
+ return NF_DROP;
+ }
+
+ if (tproto == IPPROTO_UDP || tproto == IPPROTO_TCP) {
+ hp = skb_header_pointer(skb, thoff,
+ sizeof(_hdr), &_hdr);
+ if (hp == NULL)
+ return false;
+
+ saddr = &iph->saddr;
+ sport = hp->source;
+ daddr = &iph->daddr;
+ dport = hp->dest;
+
+ } else if (tproto == IPPROTO_ICMPV6) {
+ if (extract_icmp6_fields(skb, thoff, &tproto, &saddr, &daddr,
+ &sport, &dport))
+ return false;
+ } else {
+ return false;
+ }
+
+ sk = nf_tproxy_get_sock_v6(dev_net(skb->dev), tproto,
+ saddr, daddr, sport, dport, par->in, NFT_LOOKUP_ANY);
+ if (sk != NULL) {
+ bool wildcard;
+ bool transparent = true;
+
+ /* Ignore sockets listening on INADDR_ANY */
+ wildcard = (sk->sk_state != TCP_TIME_WAIT &&
+ ipv6_addr_any(&inet6_sk(sk)->rcv_saddr));
+
+ /* Ignore non-transparent sockets,
+ if XT_SOCKET_TRANSPARENT is used */
+ if (info && info->flags & XT_SOCKET_TRANSPARENT)
+ transparent = ((sk->sk_state != TCP_TIME_WAIT &&
+ inet_sk(sk)->transparent) ||
+ (sk->sk_state == TCP_TIME_WAIT &&
+ inet_twsk(sk)->tw_transparent));
+
+ nf_tproxy_put_sock(sk);
+
+ if (wildcard || !transparent)
+ sk = NULL;
+ }
+
+ pr_debug("proto %hhu %pI6:%hu -> %pI6:%hu "
+ "(orig %pI6:%hu) sock %p\n",
+ tproto, saddr, ntohs(sport),
+ daddr, ntohs(dport),
+ &iph->daddr, hp ? ntohs(hp->dest) : 0, sk);
+
+ return (sk != NULL);
+}
+#endif
+
static struct xt_match socket_mt_reg[] __read_mostly = {
{
.name = "socket",
.revision = 0,
.family = NFPROTO_IPV4,
- .match = socket_mt_v0,
+ .match = socket_mt4_v0,
.hooks = (1 << NF_INET_PRE_ROUTING) |
(1 << NF_INET_LOCAL_IN),
.me = THIS_MODULE,
.name = "socket",
.revision = 1,
.family = NFPROTO_IPV4,
- .match = socket_mt_v1,
+ .match = socket_mt4_v1,
.matchsize = sizeof(struct xt_socket_mtinfo1),
.hooks = (1 << NF_INET_PRE_ROUTING) |
(1 << NF_INET_LOCAL_IN),
.me = THIS_MODULE,
},
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+ {
+ .name = "socket",
+ .revision = 1,
+ .family = NFPROTO_IPV6,
+ .match = socket_mt6_v1,
+ .matchsize = sizeof(struct xt_socket_mtinfo1),
+ .hooks = (1 << NF_INET_PRE_ROUTING) |
+ (1 << NF_INET_LOCAL_IN),
+ .me = THIS_MODULE,
+ },
+#endif
};
static int __init socket_mt_init(void)
{
nf_defrag_ipv4_enable();
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+ nf_defrag_ipv6_enable();
+#endif
+
return xt_register_matches(socket_mt_reg, ARRAY_SIZE(socket_mt_reg));
}
MODULE_AUTHOR("Krisztian Kovacs, Balazs Scheidler");
MODULE_DESCRIPTION("x_tables socket match module");
MODULE_ALIAS("ipt_socket");
+MODULE_ALIAS("ip6t_socket");
.lock = &ipt_lock,
};
-static int ipt_init_target(struct ipt_entry_target *t, char *table, unsigned int hook)
+static int ipt_init_target(struct xt_entry_target *t, char *table, unsigned int hook)
{
struct xt_tgchk_param par;
struct xt_target *target;
return 0;
}
-static void ipt_destroy_target(struct ipt_entry_target *t)
+static void ipt_destroy_target(struct xt_entry_target *t)
{
struct xt_tgdtor_param par = {
.target = t->u.kernel.target,
[TCA_IPT_TABLE] = { .type = NLA_STRING, .len = IFNAMSIZ },
[TCA_IPT_HOOK] = { .type = NLA_U32 },
[TCA_IPT_INDEX] = { .type = NLA_U32 },
- [TCA_IPT_TARG] = { .len = sizeof(struct ipt_entry_target) },
+ [TCA_IPT_TARG] = { .len = sizeof(struct xt_entry_target) },
};
static int tcf_ipt_init(struct nlattr *nla, struct nlattr *est,
struct nlattr *tb[TCA_IPT_MAX + 1];
struct tcf_ipt *ipt;
struct tcf_common *pc;
- struct ipt_entry_target *td, *t;
+ struct xt_entry_target *td, *t;
char *tname;
int ret = 0, err;
u32 hook = 0;
if (tb[TCA_IPT_TARG] == NULL)
return -EINVAL;
- td = (struct ipt_entry_target *)nla_data(tb[TCA_IPT_TARG]);
+ td = (struct xt_entry_target *)nla_data(tb[TCA_IPT_TARG]);
if (nla_len(tb[TCA_IPT_TARG]) < td->u.target_size)
return -EINVAL;
result = TC_ACT_SHOT;
ipt->tcf_qstats.drops++;
break;
- case IPT_CONTINUE:
+ case XT_CONTINUE:
result = TC_ACT_PIPE;
break;
default:
{
unsigned char *b = skb_tail_pointer(skb);
struct tcf_ipt *ipt = a->priv;
- struct ipt_entry_target *t;
+ struct xt_entry_target *t;
struct tcf_t tm;
struct tc_cnt c;
git://bbs.cooldavid.org / net-next-2.6.git / commitdiff