ip6_output.c (e8e6e6012d68c4967e8f26fdd39ac95c247d4789) ip6_output.c (090f1166c6790e18c30f40690098829709e8dc68)
1/*
2 * IPv6 output functions
3 * Linux INET6 implementation
4 *
5 * Authors:
6 * Pedro Roque <roque@di.fc.ul.pt>
7 *
8 * Based on linux/net/ipv4/ip_output.c

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362 struct ipv6hdr *hdr = ipv6_hdr(skb);
363 struct inet6_skb_parm *opt = IP6CB(skb);
364 struct net *net = dev_net(dst->dev);
365 u32 mtu;
366
367 if (net->ipv6.devconf_all->forwarding == 0)
368 goto error;
369
1/*
2 * IPv6 output functions
3 * Linux INET6 implementation
4 *
5 * Authors:
6 * Pedro Roque <roque@di.fc.ul.pt>
7 *
8 * Based on linux/net/ipv4/ip_output.c

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362 struct ipv6hdr *hdr = ipv6_hdr(skb);
363 struct inet6_skb_parm *opt = IP6CB(skb);
364 struct net *net = dev_net(dst->dev);
365 u32 mtu;
366
367 if (net->ipv6.devconf_all->forwarding == 0)
368 goto error;
369
370 if (skb->pkt_type != PACKET_HOST)
371 goto drop;
372
370 if (skb_warn_if_lro(skb))
371 goto drop;
372
373 if (!xfrm6_policy_check(NULL, XFRM_POLICY_FWD, skb)) {
374 IP6_INC_STATS_BH(net, ip6_dst_idev(dst),
375 IPSTATS_MIB_INDISCARDS);
376 goto drop;
377 }
378
373 if (skb_warn_if_lro(skb))
374 goto drop;
375
376 if (!xfrm6_policy_check(NULL, XFRM_POLICY_FWD, skb)) {
377 IP6_INC_STATS_BH(net, ip6_dst_idev(dst),
378 IPSTATS_MIB_INDISCARDS);
379 goto drop;
380 }
381
379 if (skb->pkt_type != PACKET_HOST)
380 goto drop;
381
382 skb_forward_csum(skb);
383
384 /*
385 * We DO NOT make any processing on
386 * RA packets, pushing them to user level AS IS
387 * without ane WARRANTY that application will be able
388 * to interpret them. The reason is that we
389 * cannot make anything clever here.

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1226 unsigned int maxnonfragsize, headersize;
1227
1228 headersize = sizeof(struct ipv6hdr) +
1229 (opt ? opt->tot_len : 0) +
1230 (dst_allfrag(&rt->dst) ?
1231 sizeof(struct frag_hdr) : 0) +
1232 rt->rt6i_nfheader_len;
1233
382 skb_forward_csum(skb);
383
384 /*
385 * We DO NOT make any processing on
386 * RA packets, pushing them to user level AS IS
387 * without ane WARRANTY that application will be able
388 * to interpret them. The reason is that we
389 * cannot make anything clever here.

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1226 unsigned int maxnonfragsize, headersize;
1227
1228 headersize = sizeof(struct ipv6hdr) +
1229 (opt ? opt->tot_len : 0) +
1230 (dst_allfrag(&rt->dst) ?
1231 sizeof(struct frag_hdr) : 0) +
1232 rt->rt6i_nfheader_len;
1233
1234 maxnonfragsize = (np->pmtudisc >= IPV6_PMTUDISC_DO) ?
1235 mtu : sizeof(struct ipv6hdr) + IPV6_MAXPLEN;
1234 if (ip6_sk_local_df(sk))
1235 maxnonfragsize = sizeof(struct ipv6hdr) + IPV6_MAXPLEN;
1236 else
1237 maxnonfragsize = mtu;
1236
1237 /* dontfrag active */
1238 if ((cork->length + length > mtu - headersize) && dontfrag &&
1239 (sk->sk_protocol == IPPROTO_UDP ||
1240 sk->sk_protocol == IPPROTO_RAW)) {
1241 ipv6_local_rxpmtu(sk, fl6, mtu - headersize +
1242 sizeof(struct ipv6hdr));
1243 goto emsgsize;

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1535 skb->len += tmp_skb->len;
1536 skb->data_len += tmp_skb->len;
1537 skb->truesize += tmp_skb->truesize;
1538 tmp_skb->destructor = NULL;
1539 tmp_skb->sk = NULL;
1540 }
1541
1542 /* Allow local fragmentation. */
1238
1239 /* dontfrag active */
1240 if ((cork->length + length > mtu - headersize) && dontfrag &&
1241 (sk->sk_protocol == IPPROTO_UDP ||
1242 sk->sk_protocol == IPPROTO_RAW)) {
1243 ipv6_local_rxpmtu(sk, fl6, mtu - headersize +
1244 sizeof(struct ipv6hdr));
1245 goto emsgsize;

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1537 skb->len += tmp_skb->len;
1538 skb->data_len += tmp_skb->len;
1539 skb->truesize += tmp_skb->truesize;
1540 tmp_skb->destructor = NULL;
1541 tmp_skb->sk = NULL;
1542 }
1543
1544 /* Allow local fragmentation. */
1543 if (np->pmtudisc < IPV6_PMTUDISC_DO)
1544 skb->local_df = 1;
1545 skb->local_df = ip6_sk_local_df(sk);
1545
1546 *final_dst = fl6->daddr;
1547 __skb_pull(skb, skb_network_header_len(skb));
1548 if (opt && opt->opt_flen)
1549 ipv6_push_frag_opts(skb, opt, &proto);
1550 if (opt && opt->opt_nflen)
1551 ipv6_push_nfrag_opts(skb, opt, &proto, &final_dst);
1552

--- 53 unchanged lines hidden --- 		1546
1547 *final_dst = fl6->daddr;
1548 __skb_pull(skb, skb_network_header_len(skb));
1549 if (opt && opt->opt_flen)
1550 ipv6_push_frag_opts(skb, opt, &proto);
1551 if (opt && opt->opt_nflen)
1552 ipv6_push_nfrag_opts(skb, opt, &proto, &final_dst);
1553

--- 53 unchanged lines hidden ---