DEFINE_SNMP_STAT(struct udp_mib, udp_stats_in6) __read_mostly;
+static int ipv6_rcv_saddr_any(const struct sock *sk)
+{
+ struct ipv6_pinfo *np = inet6_sk(sk);
+
+ return ipv6_addr_any(&np->rcv_saddr);
+}
+
+static unsigned int ipv6_hash_port_and_rcv_saddr(__u16 port,
+ const struct sock *sk)
+{
+ return port;
+}
+
+const struct udp_get_port_ops udp_ipv6_ops = {
+ .saddr_cmp = ipv6_rcv_saddr_equal,
+ .saddr_any = ipv6_rcv_saddr_any,
+ .hash_port_and_rcv_saddr = ipv6_hash_port_and_rcv_saddr,
+};
+
static inline int udp_v6_get_port(struct sock *sk, unsigned short snum)
{
- return udp_get_port(sk, snum, ipv6_rcv_saddr_equal);
+ return udp_get_port(sk, snum, &udp_ipv6_ops);
}
static struct sock *__udp6_lib_lookup(struct in6_addr *saddr, __be16 sport,
continue;
score++;
}
- if(score == 4) {
+ if (score == 4) {
result = sk;
break;
- } else if(score > badness) {
+ } else if (score > badness) {
result = sk;
badness = score;
}
struct ipv6_pinfo *np = inet6_sk(sk);
struct inet_sock *inet = inet_sk(sk);
struct sk_buff *skb;
- size_t copied;
- int err, copy_only, is_udplite = IS_UDPLITE(sk);
+ unsigned int ulen, copied;
+ int err;
+ int is_udplite = IS_UDPLITE(sk);
if (addr_len)
*addr_len=sizeof(struct sockaddr_in6);
if (!skb)
goto out;
- copied = skb->len - sizeof(struct udphdr);
- if (copied > len) {
- copied = len;
+ ulen = skb->len - sizeof(struct udphdr);
+ copied = len;
+ if (copied > ulen)
+ copied = ulen;
+ else if (copied < ulen)
msg->msg_flags |= MSG_TRUNC;
- }
/*
- * Decide whether to checksum and/or copy data.
+ * If checksum is needed at all, try to do it while copying the
+ * data. If the data is truncated, or if we only want a partial
+ * coverage checksum (UDP-Lite), do it before the copy.
*/
- copy_only = (skb->ip_summed==CHECKSUM_UNNECESSARY);
- if (is_udplite || (!copy_only && msg->msg_flags&MSG_TRUNC)) {
- if (__udp_lib_checksum_complete(skb))
+ if (copied < ulen || UDP_SKB_CB(skb)->partial_cov) {
+ if (udp_lib_checksum_complete(skb))
goto csum_copy_err;
- copy_only = 1;
}
- if (copy_only)
+ if (skb_csum_unnecessary(skb))
err = skb_copy_datagram_iovec(skb, sizeof(struct udphdr),
msg->msg_iov, copied );
else {
sin6 = (struct sockaddr_in6 *) msg->msg_name;
sin6->sin6_family = AF_INET6;
- sin6->sin6_port = skb->h.uh->source;
+ sin6->sin6_port = udp_hdr(skb)->source;
sin6->sin6_flowinfo = 0;
sin6->sin6_scope_id = 0;
if (skb->protocol == htons(ETH_P_IP))
ipv6_addr_set(&sin6->sin6_addr, 0, 0,
- htonl(0xffff), skb->nh.iph->saddr);
+ htonl(0xffff), ip_hdr(skb)->saddr);
else {
- ipv6_addr_copy(&sin6->sin6_addr, &skb->nh.ipv6h->saddr);
+ ipv6_addr_copy(&sin6->sin6_addr,
+ &ipv6_hdr(skb)->saddr);
if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL)
sin6->sin6_scope_id = IP6CB(skb)->iif;
}
err = copied;
if (flags & MSG_TRUNC)
- err = skb->len - sizeof(struct udphdr);
+ err = ulen;
out_free:
skb_free_datagram(sk, skb);
}
}
- if (udp_lib_checksum_complete(skb))
- goto drop;
+ if (sk->sk_filter) {
+ if (udp_lib_checksum_complete(skb))
+ goto drop;
+ }
if ((rc = sock_queue_rcv_skb(sk,skb)) < 0) {
/* Note that an ENOMEM error is charged twice */
if (!ipv6_addr_equal(&np->rcv_saddr, loc_addr))
continue;
}
- if(!inet6_mc_check(s, loc_addr, rmt_addr))
+ if (!inet6_mc_check(s, loc_addr, rmt_addr))
continue;
return s;
}
struct in6_addr *daddr, struct hlist_head udptable[])
{
struct sock *sk, *sk2;
- const struct udphdr *uh = skb->h.uh;
+ const struct udphdr *uh = udp_hdr(skb);
int dif;
read_lock(&udp_hash_lock);
return 0;
}
-static inline int udp6_csum_init(struct sk_buff *skb, struct udphdr *uh)
-
+static inline int udp6_csum_init(struct sk_buff *skb, struct udphdr *uh,
+ int proto)
{
+ int err;
+
+ UDP_SKB_CB(skb)->partial_cov = 0;
+ UDP_SKB_CB(skb)->cscov = skb->len;
+
+ if (proto == IPPROTO_UDPLITE) {
+ err = udplite_checksum_init(skb, uh);
+ if (err)
+ return err;
+ }
+
if (uh->check == 0) {
/* RFC 2460 section 8.1 says that we SHOULD log
this error. Well, it is reasonable.
return 1;
}
if (skb->ip_summed == CHECKSUM_COMPLETE &&
- !csum_ipv6_magic(&skb->nh.ipv6h->saddr, &skb->nh.ipv6h->daddr,
- skb->len, IPPROTO_UDP, skb->csum ))
+ !csum_ipv6_magic(&ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr,
+ skb->len, proto, skb->csum))
skb->ip_summed = CHECKSUM_UNNECESSARY;
- if (skb->ip_summed != CHECKSUM_UNNECESSARY)
- skb->csum = ~csum_unfold(csum_ipv6_magic(&skb->nh.ipv6h->saddr,
- &skb->nh.ipv6h->daddr,
- skb->len, IPPROTO_UDP,
- 0));
+ if (!skb_csum_unnecessary(skb))
+ skb->csum = ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
+ &ipv6_hdr(skb)->daddr,
+ skb->len, proto, 0));
- return (UDP_SKB_CB(skb)->partial_cov = 0);
+ return 0;
}
int __udp6_lib_rcv(struct sk_buff **pskb, struct hlist_head udptable[],
- int is_udplite)
+ int proto)
{
struct sk_buff *skb = *pskb;
struct sock *sk;
if (!pskb_may_pull(skb, sizeof(struct udphdr)))
goto short_packet;
- saddr = &skb->nh.ipv6h->saddr;
- daddr = &skb->nh.ipv6h->daddr;
- uh = skb->h.uh;
+ saddr = &ipv6_hdr(skb)->saddr;
+ daddr = &ipv6_hdr(skb)->daddr;
+ uh = udp_hdr(skb);
ulen = ntohs(uh->len);
if (ulen > skb->len)
goto short_packet;
- if(! is_udplite ) { /* UDP validates ulen. */
+ if (proto == IPPROTO_UDP) {
+ /* UDP validates ulen. */
/* Check for jumbo payload */
if (ulen == 0)
if (ulen < skb->len) {
if (pskb_trim_rcsum(skb, ulen))
goto short_packet;
- saddr = &skb->nh.ipv6h->saddr;
- daddr = &skb->nh.ipv6h->daddr;
- uh = skb->h.uh;
+ saddr = &ipv6_hdr(skb)->saddr;
+ daddr = &ipv6_hdr(skb)->daddr;
+ uh = udp_hdr(skb);
}
-
- if (udp6_csum_init(skb, uh))
- goto discard;
-
- } else { /* UDP-Lite validates cscov. */
- if (udplite6_csum_init(skb, uh))
- goto discard;
}
+ if (udp6_csum_init(skb, uh, proto))
+ goto discard;
+
/*
* Multicast receive code
*/
if (udp_lib_checksum_complete(skb))
goto discard;
- UDP6_INC_STATS_BH(UDP_MIB_NOPORTS, is_udplite);
+ UDP6_INC_STATS_BH(UDP_MIB_NOPORTS, proto == IPPROTO_UDPLITE);
icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_PORT_UNREACH, 0, dev);
kfree_skb(skb);
- return(0);
+ return 0;
}
/* deliver */
udpv6_queue_rcv_skb(sk, skb);
sock_put(sk);
- return(0);
+ return 0;
short_packet:
LIMIT_NETDEBUG(KERN_DEBUG "UDP%sv6: short packet: %d/%u\n",
- is_udplite? "-Lite" : "", ulen, skb->len);
+ proto == IPPROTO_UDPLITE ? "-Lite" : "",
+ ulen, skb->len);
discard:
- UDP6_INC_STATS_BH(UDP_MIB_INERRORS, is_udplite);
+ UDP6_INC_STATS_BH(UDP_MIB_INERRORS, proto == IPPROTO_UDPLITE);
kfree_skb(skb);
- return(0);
+ return 0;
}
static __inline__ int udpv6_rcv(struct sk_buff **pskb)
{
- return __udp6_lib_rcv(pskb, udp_hash, 0);
+ return __udp6_lib_rcv(pskb, udp_hash, IPPROTO_UDP);
}
/*
/*
* Create a UDP header
*/
- uh = skb->h.uh;
+ uh = udp_hdr(skb);
uh->source = fl->fl_ip_sport;
uh->dest = fl->fl_ip_dport;
uh->len = htons(up->len);
if (final_p)
ipv6_addr_copy(&fl.fl6_dst, final_p);
- if ((err = xfrm_lookup(&dst, &fl, sk, 1)) < 0)
- goto out;
+ if ((err = __xfrm_lookup(&dst, &fl, sk, 1)) < 0) {
+ if (err == -EREMOTE)
+ err = ip6_dst_blackhole(sk, &dst, &fl);
+ if (err < 0)
+ goto out;
+ }
if (hlimit < 0) {
if (ipv6_addr_is_multicast(&fl.fl6_dst))
git://bbs.cooldavid.org / net-next-2.6.git / blobdiff