ip_output.c (b92dacd45698e120104ff81066ceb534916090d9) ip_output.c (e2cb77db089796f163092326ca25512845df7a3a)
1/*
2 * INET An implementation of the TCP/IP protocol suite for the LINUX
3 * operating system. INET is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
5 *
6 * The Internet Protocol (IP) output module.
7 *
8 * Authors: Ross Biro

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103
104 iph->tot_len = htons(skb->len);
105 ip_send_check(iph);
106 return nf_hook(NFPROTO_IPV4, NF_INET_LOCAL_OUT,
107 net, sk, skb, NULL, skb_dst(skb)->dev,
108 dst_output);
109}
110
1/*
2 * INET An implementation of the TCP/IP protocol suite for the LINUX
3 * operating system. INET is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
5 *
6 * The Internet Protocol (IP) output module.
7 *
8 * Authors: Ross Biro

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103
104 iph->tot_len = htons(skb->len);
105 ip_send_check(iph);
106 return nf_hook(NFPROTO_IPV4, NF_INET_LOCAL_OUT,
107 net, sk, skb, NULL, skb_dst(skb)->dev,
108 dst_output);
109}
110
111int ip_local_out_sk(struct sock *sk, struct sk_buff *skb)
111int ip_local_out(struct sock *sk, struct sk_buff *skb)
112{
113 struct net *net = dev_net(skb_dst(skb)->dev);
114 int err;
115
116 err = __ip_local_out(sk, skb);
117 if (likely(err == 1))
118 err = dst_output(net, sk, skb);
119
120 return err;
121}
112{
113 struct net *net = dev_net(skb_dst(skb)->dev);
114 int err;
115
116 err = __ip_local_out(sk, skb);
117 if (likely(err == 1))
118 err = dst_output(net, sk, skb);
119
120 return err;
121}
122EXPORT_SYMBOL_GPL(ip_local_out_sk);
122EXPORT_SYMBOL_GPL(ip_local_out);
123
124static inline int ip_select_ttl(struct inet_sock *inet, struct dst_entry *dst)
125{
126 int ttl = inet->uc_ttl;
127
128 if (ttl < 0)
129 ttl = ip4_dst_hoplimit(dst);
130 return ttl;

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164 iph->ihl += opt->opt.optlen>>2;
165 ip_options_build(skb, &opt->opt, daddr, rt, 0);
166 }
167
168 skb->priority = sk->sk_priority;
169 skb->mark = sk->sk_mark;
170
171 /* Send it out. */
123
124static inline int ip_select_ttl(struct inet_sock *inet, struct dst_entry *dst)
125{
126 int ttl = inet->uc_ttl;
127
128 if (ttl < 0)
129 ttl = ip4_dst_hoplimit(dst);
130 return ttl;

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164 iph->ihl += opt->opt.optlen>>2;
165 ip_options_build(skb, &opt->opt, daddr, rt, 0);
166 }
167
168 skb->priority = sk->sk_priority;
169 skb->mark = sk->sk_mark;
170
171 /* Send it out. */
172 return ip_local_out(skb);
172 return ip_local_out(skb->sk, skb);
173}
174EXPORT_SYMBOL_GPL(ip_build_and_send_pkt);
175
176static int ip_finish_output2(struct net *net, struct sock *sk, struct sk_buff *skb)
177{
178 struct dst_entry *dst = skb_dst(skb);
179 struct rtable *rt = (struct rtable *)dst;
180 struct net_device *dev = dst->dev;

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451
452 ip_select_ident_segs(sock_net(sk), skb, sk,
453 skb_shinfo(skb)->gso_segs ?: 1);
454
455 /* TODO : should we use skb->sk here instead of sk ? */
456 skb->priority = sk->sk_priority;
457 skb->mark = sk->sk_mark;
458
173}
174EXPORT_SYMBOL_GPL(ip_build_and_send_pkt);
175
176static int ip_finish_output2(struct net *net, struct sock *sk, struct sk_buff *skb)
177{
178 struct dst_entry *dst = skb_dst(skb);
179 struct rtable *rt = (struct rtable *)dst;
180 struct net_device *dev = dst->dev;

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451
452 ip_select_ident_segs(sock_net(sk), skb, sk,
453 skb_shinfo(skb)->gso_segs ?: 1);
454
455 /* TODO : should we use skb->sk here instead of sk ? */
456 skb->priority = sk->sk_priority;
457 skb->mark = sk->sk_mark;
458
459 res = ip_local_out_sk(sk, skb);
459 res = ip_local_out(sk, skb);
460 rcu_read_unlock();
461 return res;
462
463no_route:
464 rcu_read_unlock();
465 IP_INC_STATS(sock_net(sk), IPSTATS_MIB_OUTNOROUTES);
466 kfree_skb(skb);
467 return -EHOSTUNREACH;

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1431out:
1432 return skb;
1433}
1434
1435int ip_send_skb(struct net *net, struct sk_buff *skb)
1436{
1437 int err;
1438
460 rcu_read_unlock();
461 return res;
462
463no_route:
464 rcu_read_unlock();
465 IP_INC_STATS(sock_net(sk), IPSTATS_MIB_OUTNOROUTES);
466 kfree_skb(skb);
467 return -EHOSTUNREACH;

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1431out:
1432 return skb;
1433}
1434
1435int ip_send_skb(struct net *net, struct sk_buff *skb)
1436{
1437 int err;
1438
1439 err = ip_local_out(skb);
1439 err = ip_local_out(skb->sk, skb);
1440 if (err) {
1441 if (err > 0)
1442 err = net_xmit_errno(err);
1443 if (err)
1444 IP_INC_STATS(net, IPSTATS_MIB_OUTDISCARDS);
1445 }
1446
1447 return err;

--- 169 unchanged lines hidden --- 		1440 if (err) {
1441 if (err > 0)
1442 err = net_xmit_errno(err);
1443 if (err)
1444 IP_INC_STATS(net, IPSTATS_MIB_OUTDISCARDS);
1445 }
1446
1447 return err;

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