diff options
Diffstat (limited to 'net/ipv6/reassembly.c')
| -rw-r--r-- | net/ipv6/reassembly.c | 23 |
1 files changed, 21 insertions, 2 deletions
diff --git a/net/ipv6/reassembly.c b/net/ipv6/reassembly.c index 196ab9347ad1..e6e44cef8db2 100644 --- a/net/ipv6/reassembly.c +++ b/net/ipv6/reassembly.c @@ -58,6 +58,7 @@ #include <net/ndisc.h> #include <net/addrconf.h> #include <net/inet_frag.h> +#include <net/inet_ecn.h> struct ip6frag_skb_cb { @@ -67,6 +68,10 @@ struct ip6frag_skb_cb #define FRAG6_CB(skb) ((struct ip6frag_skb_cb*)((skb)->cb)) +static inline u8 ip6_frag_ecn(const struct ipv6hdr *ipv6h) +{ + return 1 << (ipv6_get_dsfield(ipv6h) & INET_ECN_MASK); +} static struct inet_frags ip6_frags; @@ -119,6 +124,7 @@ void ip6_frag_init(struct inet_frag_queue *q, void *a) fq->user = arg->user; fq->saddr = *arg->src; fq->daddr = *arg->dst; + fq->ecn = arg->ecn; } EXPORT_SYMBOL(ip6_frag_init); @@ -173,7 +179,8 @@ static void ip6_frag_expire(unsigned long data) } static __inline__ struct frag_queue * -fq_find(struct net *net, __be32 id, const struct in6_addr *src, const struct in6_addr *dst) +fq_find(struct net *net, __be32 id, const struct in6_addr *src, + const struct in6_addr *dst, u8 ecn) { struct inet_frag_queue *q; struct ip6_create_arg arg; @@ -183,6 +190,7 @@ fq_find(struct net *net, __be32 id, const struct in6_addr *src, const struct in6 arg.user = IP6_DEFRAG_LOCAL_DELIVER; arg.src = src; arg.dst = dst; + arg.ecn = ecn; read_lock(&ip6_frags.lock); hash = inet6_hash_frag(id, src, dst, ip6_frags.rnd); @@ -202,6 +210,7 @@ static int ip6_frag_queue(struct frag_queue *fq, struct sk_buff *skb, struct net_device *dev; int offset, end; struct net *net = dev_net(skb_dst(skb)->dev); + u8 ecn; if (fq->q.last_in & INET_FRAG_COMPLETE) goto err; @@ -219,6 +228,8 @@ static int ip6_frag_queue(struct frag_queue *fq, struct sk_buff *skb, return -1; } + ecn = ip6_frag_ecn(ipv6_hdr(skb)); + if (skb->ip_summed == CHECKSUM_COMPLETE) { const unsigned char *nh = skb_network_header(skb); skb->csum = csum_sub(skb->csum, @@ -319,6 +330,7 @@ found: } fq->q.stamp = skb->tstamp; fq->q.meat += skb->len; + fq->ecn |= ecn; add_frag_mem_limit(&fq->q, skb->truesize); /* The first fragment. @@ -362,9 +374,14 @@ static int ip6_frag_reasm(struct frag_queue *fq, struct sk_buff *prev, int payload_len; unsigned int nhoff; int sum_truesize; + u8 ecn; inet_frag_kill(&fq->q, &ip6_frags); + ecn = ip_frag_ecn_table[fq->ecn]; + if (unlikely(ecn == 0xff)) + goto out_fail; + /* Make the one we just received the head. */ if (prev) { head = prev->next; @@ -463,6 +480,7 @@ static int ip6_frag_reasm(struct frag_queue *fq, struct sk_buff *prev, head->dev = dev; head->tstamp = fq->q.stamp; ipv6_hdr(head)->payload_len = htons(payload_len); + ipv6_change_dsfield(ipv6_hdr(head), 0xff, ecn); IP6CB(head)->nhoff = nhoff; /* Yes, and fold redundant checksum back. 8) */ @@ -526,7 +544,8 @@ static int ipv6_frag_rcv(struct sk_buff *skb) IP6_ADD_STATS_BH(net, ip6_dst_idev(skb_dst(skb)), IPSTATS_MIB_REASMFAILS, evicted); - fq = fq_find(net, fhdr->identification, &hdr->saddr, &hdr->daddr); + fq = fq_find(net, fhdr->identification, &hdr->saddr, &hdr->daddr, + ip6_frag_ecn(hdr)); if (fq != NULL) { int ret; |