reassembly.c (98b3377ca77a06a7bd75a444e9f7136e9bb5112e) reassembly.c (3bd653c8455bc7991bae77968702b31c8f5df883)
1/*
2 * IPv6 fragment reassembly
3 * Linux INET6 implementation
4 *
5 * Authors:
6 * Pedro Roque <roque@di.fc.ul.pt>
7 *
8 * Based on: net/ipv4/ip_fragment.c

--- 419 unchanged lines hidden (view full) ---

428 return ip6_frag_reasm(fq, prev, dev);
429
430 write_lock(&ip6_frags.lock);
431 list_move_tail(&fq->q.lru_list, &fq->q.net->lru_list);
432 write_unlock(&ip6_frags.lock);
433 return -1;
434
435err:
1/*
2 * IPv6 fragment reassembly
3 * Linux INET6 implementation
4 *
5 * Authors:
6 * Pedro Roque <roque@di.fc.ul.pt>
7 *
8 * Based on: net/ipv4/ip_fragment.c

--- 419 unchanged lines hidden (view full) ---

428 return ip6_frag_reasm(fq, prev, dev);
429
430 write_lock(&ip6_frags.lock);
431 list_move_tail(&fq->q.lru_list, &fq->q.net->lru_list);
432 write_unlock(&ip6_frags.lock);
433 return -1;
434
435err:
436 IP6_INC_STATS(ip6_dst_idev(skb->dst), IPSTATS_MIB_REASMFAILS);
436 IP6_INC_STATS(dev_net(skb->dst->dev), ip6_dst_idev(skb->dst),
437 IPSTATS_MIB_REASMFAILS);
437 kfree_skb(skb);
438 return -1;
439}
440
441/*
442 * Check if this packet is complete.
443 * Returns NULL on failure by any reason, and pointer
444 * to current nexthdr field in reassembled frame.

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568 return -1;
569}
570
571static int ipv6_frag_rcv(struct sk_buff *skb)
572{
573 struct frag_hdr *fhdr;
574 struct frag_queue *fq;
575 struct ipv6hdr *hdr = ipv6_hdr(skb);
438 kfree_skb(skb);
439 return -1;
440}
441
442/*
443 * Check if this packet is complete.
444 * Returns NULL on failure by any reason, and pointer
445 * to current nexthdr field in reassembled frame.

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569 return -1;
570}
571
572static int ipv6_frag_rcv(struct sk_buff *skb)
573{
574 struct frag_hdr *fhdr;
575 struct frag_queue *fq;
576 struct ipv6hdr *hdr = ipv6_hdr(skb);
576 struct net *net;
577 struct net *net = dev_net(skb->dst->dev);
577
578 IP6_INC_STATS_BH(ip6_dst_idev(skb->dst), IPSTATS_MIB_REASMREQDS);
579
580 /* Jumbo payload inhibits frag. header */
581 if (hdr->payload_len==0)
582 goto fail_hdr;
583
584 if (!pskb_may_pull(skb, (skb_transport_offset(skb) +

--- 7 unchanged lines hidden (view full) ---

592 /* It is not a fragmented frame */
593 skb->transport_header += sizeof(struct frag_hdr);
594 IP6_INC_STATS_BH(ip6_dst_idev(skb->dst), IPSTATS_MIB_REASMOKS);
595
596 IP6CB(skb)->nhoff = (u8 *)fhdr - skb_network_header(skb);
597 return 1;
598 }
599
578
579 IP6_INC_STATS_BH(ip6_dst_idev(skb->dst), IPSTATS_MIB_REASMREQDS);
580
581 /* Jumbo payload inhibits frag. header */
582 if (hdr->payload_len==0)
583 goto fail_hdr;
584
585 if (!pskb_may_pull(skb, (skb_transport_offset(skb) +

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593 /* It is not a fragmented frame */
594 skb->transport_header += sizeof(struct frag_hdr);
595 IP6_INC_STATS_BH(ip6_dst_idev(skb->dst), IPSTATS_MIB_REASMOKS);
596
597 IP6CB(skb)->nhoff = (u8 *)fhdr - skb_network_header(skb);
598 return 1;
599 }
600
600 net = dev_net(skb->dev);
601 if (atomic_read(&net->ipv6.frags.mem) > net->ipv6.frags.high_thresh)
602 ip6_evictor(net, ip6_dst_idev(skb->dst));
603
604 if ((fq = fq_find(net, fhdr->identification, &hdr->saddr, &hdr->daddr,
605 ip6_dst_idev(skb->dst))) != NULL) {
606 int ret;
607
608 spin_lock(&fq->q.lock);

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614 return ret;
615 }
616
617 IP6_INC_STATS_BH(ip6_dst_idev(skb->dst), IPSTATS_MIB_REASMFAILS);
618 kfree_skb(skb);
619 return -1;
620
621fail_hdr:
601 if (atomic_read(&net->ipv6.frags.mem) > net->ipv6.frags.high_thresh)
602 ip6_evictor(net, ip6_dst_idev(skb->dst));
603
604 if ((fq = fq_find(net, fhdr->identification, &hdr->saddr, &hdr->daddr,
605 ip6_dst_idev(skb->dst))) != NULL) {
606 int ret;
607
608 spin_lock(&fq->q.lock);

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614 return ret;
615 }
616
617 IP6_INC_STATS_BH(ip6_dst_idev(skb->dst), IPSTATS_MIB_REASMFAILS);
618 kfree_skb(skb);
619 return -1;
620
621fail_hdr:
622 IP6_INC_STATS(ip6_dst_idev(skb->dst), IPSTATS_MIB_INHDRERRORS);
622 IP6_INC_STATS(net, ip6_dst_idev(skb->dst), IPSTATS_MIB_INHDRERRORS);
623 icmpv6_param_prob(skb, ICMPV6_HDR_FIELD, skb_network_header_len(skb));
624 return -1;
625}
626
627static struct inet6_protocol frag_protocol =
628{
629 .handler = ipv6_frag_rcv,
630 .flags = INET6_PROTO_NOPOLICY,

--- 181 unchanged lines hidden --- 		623 icmpv6_param_prob(skb, ICMPV6_HDR_FIELD, skb_network_header_len(skb));
624 return -1;
625}
626
627static struct inet6_protocol frag_protocol =
628{
629 .handler = ipv6_frag_rcv,
630 .flags = INET6_PROTO_NOPOLICY,

--- 181 unchanged lines hidden ---