#include <linux/in.h>
#include <linux/ip.h>
#include <linux/kernel.h>
+#include <linux/netfilter.h>
#include <linux/netfilter_ipv4.h>
#include <linux/udp.h>
#include <net/ip_vs.h>
-
+#include <net/ip.h>
static struct ip_vs_conn *
udp_conn_in_get(const struct sk_buff *skb, struct ip_vs_protocol *pp,
struct ip_vs_conn *cp;
__be16 _ports[2], *pptr;
- pptr = skb_header_pointer(skb, skb->nh.iph->ihl*4,
+ pptr = skb_header_pointer(skb, ip_hdrlen(skb),
sizeof(_ports), _ports);
if (pptr == NULL)
return NULL;
struct ip_vs_service *svc;
struct udphdr _udph, *uh;
- uh = skb_header_pointer(skb, skb->nh.iph->ihl*4,
+ uh = skb_header_pointer(skb, ip_hdrlen(skb),
sizeof(_udph), &_udph);
if (uh == NULL) {
*verdict = NF_DROP;
return 0;
}
- if ((svc = ip_vs_service_get(skb->nfmark, skb->nh.iph->protocol,
- skb->nh.iph->daddr, uh->dest))) {
+ if ((svc = ip_vs_service_get(skb->mark, ip_hdr(skb)->protocol,
+ ip_hdr(skb)->daddr, uh->dest))) {
if (ip_vs_todrop()) {
/*
* It seems that we are very loaded.
__be16 oldport, __be16 newport)
{
uhdr->check =
- ip_vs_check_diff(~oldip, newip,
- ip_vs_check_diff(oldport ^ htonl(0xFFFF),
- newport, uhdr->check));
+ csum_fold(ip_vs_check_diff4(oldip, newip,
+ ip_vs_check_diff2(oldport, newport,
+ ~csum_unfold(uhdr->check))));
if (!uhdr->check)
- uhdr->check = htonl(0xFFFF);
+ uhdr->check = CSUM_MANGLED_0;
}
static int
-udp_snat_handler(struct sk_buff **pskb,
+udp_snat_handler(struct sk_buff *skb,
struct ip_vs_protocol *pp, struct ip_vs_conn *cp)
{
struct udphdr *udph;
- unsigned int udphoff = (*pskb)->nh.iph->ihl * 4;
+ const unsigned int udphoff = ip_hdrlen(skb);
/* csum_check requires unshared skb */
- if (!ip_vs_make_skb_writable(pskb, udphoff+sizeof(*udph)))
+ if (!skb_make_writable(skb, udphoff+sizeof(*udph)))
return 0;
if (unlikely(cp->app != NULL)) {
/* Some checks before mangling */
- if (pp->csum_check && !pp->csum_check(*pskb, pp))
+ if (pp->csum_check && !pp->csum_check(skb, pp))
return 0;
/*
* Call application helper if needed
*/
- if (!ip_vs_app_pkt_out(cp, pskb))
+ if (!ip_vs_app_pkt_out(cp, skb))
return 0;
}
- udph = (void *)(*pskb)->nh.iph + udphoff;
+ udph = (void *)ip_hdr(skb) + udphoff;
udph->source = cp->vport;
/*
/* Only port and addr are changed, do fast csum update */
udp_fast_csum_update(udph, cp->daddr, cp->vaddr,
cp->dport, cp->vport);
- if ((*pskb)->ip_summed == CHECKSUM_COMPLETE)
- (*pskb)->ip_summed = CHECKSUM_NONE;
+ if (skb->ip_summed == CHECKSUM_COMPLETE)
+ skb->ip_summed = CHECKSUM_NONE;
} else {
/* full checksum calculation */
udph->check = 0;
- (*pskb)->csum = skb_checksum(*pskb, udphoff,
- (*pskb)->len - udphoff, 0);
+ skb->csum = skb_checksum(skb, udphoff, skb->len - udphoff, 0);
udph->check = csum_tcpudp_magic(cp->vaddr, cp->caddr,
- (*pskb)->len - udphoff,
- cp->protocol,
- (*pskb)->csum);
+ skb->len - udphoff,
+ cp->protocol, skb->csum);
if (udph->check == 0)
- udph->check = htonl(0xFFFF);
+ udph->check = CSUM_MANGLED_0;
IP_VS_DBG(11, "O-pkt: %s O-csum=%d (+%zd)\n",
pp->name, udph->check,
(char*)&(udph->check) - (char*)udph);
static int
-udp_dnat_handler(struct sk_buff **pskb,
+udp_dnat_handler(struct sk_buff *skb,
struct ip_vs_protocol *pp, struct ip_vs_conn *cp)
{
struct udphdr *udph;
- unsigned int udphoff = (*pskb)->nh.iph->ihl * 4;
+ unsigned int udphoff = ip_hdrlen(skb);
/* csum_check requires unshared skb */
- if (!ip_vs_make_skb_writable(pskb, udphoff+sizeof(*udph)))
+ if (!skb_make_writable(skb, udphoff+sizeof(*udph)))
return 0;
if (unlikely(cp->app != NULL)) {
/* Some checks before mangling */
- if (pp->csum_check && !pp->csum_check(*pskb, pp))
+ if (pp->csum_check && !pp->csum_check(skb, pp))
return 0;
/*
* Attempt ip_vs_app call.
* It will fix ip_vs_conn
*/
- if (!ip_vs_app_pkt_in(cp, pskb))
+ if (!ip_vs_app_pkt_in(cp, skb))
return 0;
}
- udph = (void *)(*pskb)->nh.iph + udphoff;
+ udph = (void *)ip_hdr(skb) + udphoff;
udph->dest = cp->dport;
/*
/* Only port and addr are changed, do fast csum update */
udp_fast_csum_update(udph, cp->vaddr, cp->daddr,
cp->vport, cp->dport);
- if ((*pskb)->ip_summed == CHECKSUM_COMPLETE)
- (*pskb)->ip_summed = CHECKSUM_NONE;
+ if (skb->ip_summed == CHECKSUM_COMPLETE)
+ skb->ip_summed = CHECKSUM_NONE;
} else {
/* full checksum calculation */
udph->check = 0;
- (*pskb)->csum = skb_checksum(*pskb, udphoff,
- (*pskb)->len - udphoff, 0);
+ skb->csum = skb_checksum(skb, udphoff, skb->len - udphoff, 0);
udph->check = csum_tcpudp_magic(cp->caddr, cp->daddr,
- (*pskb)->len - udphoff,
- cp->protocol,
- (*pskb)->csum);
+ skb->len - udphoff,
+ cp->protocol, skb->csum);
if (udph->check == 0)
- udph->check = 0xFFFF;
- (*pskb)->ip_summed = CHECKSUM_UNNECESSARY;
+ udph->check = CSUM_MANGLED_0;
+ skb->ip_summed = CHECKSUM_UNNECESSARY;
}
return 1;
}
udp_csum_check(struct sk_buff *skb, struct ip_vs_protocol *pp)
{
struct udphdr _udph, *uh;
- unsigned int udphoff = skb->nh.iph->ihl*4;
+ const unsigned int udphoff = ip_hdrlen(skb);
uh = skb_header_pointer(skb, udphoff, sizeof(_udph), &_udph);
if (uh == NULL)
skb->csum = skb_checksum(skb, udphoff,
skb->len - udphoff, 0);
case CHECKSUM_COMPLETE:
- if (csum_tcpudp_magic(skb->nh.iph->saddr,
- skb->nh.iph->daddr,
+ if (csum_tcpudp_magic(ip_hdr(skb)->saddr,
+ ip_hdr(skb)->daddr,
skb->len - udphoff,
- skb->nh.iph->protocol,
+ ip_hdr(skb)->protocol,
skb->csum)) {
IP_VS_DBG_RL_PKT(0, pp, skb, 0,
"Failed checksum for");
static struct list_head udp_apps[UDP_APP_TAB_SIZE];
static DEFINE_SPINLOCK(udp_app_lock);
-static inline __u16 udp_app_hashkey(__u16 port)
+static inline __u16 udp_app_hashkey(__be16 port)
{
- return ((port >> UDP_APP_TAB_BITS) ^ port) & UDP_APP_TAB_MASK;
+ return (((__force u16)port >> UDP_APP_TAB_BITS) ^ (__force u16)port)
+ & UDP_APP_TAB_MASK;
}
static int udp_register_app(struct ip_vs_app *inc)
{
struct ip_vs_app *i;
- __u16 hash, port = inc->port;
+ __u16 hash;
+ __be16 port = inc->port;
int ret = 0;
hash = udp_app_hashkey(port);
git://bbs.cooldavid.org / net-next-2.6.git / blobdiff