xfrm6_output.c (2fe5de9ce7d57498abc14b375cad2fcf8c3ee6cc) xfrm6_output.c (60ff746739bf805a912484643c720b6124826140)
1/*
2 * xfrm6_output.c - Common IPsec encapsulation code for IPv6.
3 * Copyright (C) 2002 USAGI/WIDE Project
4 * Copyright (c) 2004 Herbert Xu <herbert@gondor.apana.org.au>
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version

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73{
74 int mtu, ret = 0;
75 struct dst_entry *dst = skb_dst(skb);
76
77 mtu = dst_mtu(dst);
78 if (mtu < IPV6_MIN_MTU)
79 mtu = IPV6_MIN_MTU;
80
1/*
2 * xfrm6_output.c - Common IPsec encapsulation code for IPv6.
3 * Copyright (C) 2002 USAGI/WIDE Project
4 * Copyright (c) 2004 Herbert Xu <herbert@gondor.apana.org.au>
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version

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

73{
74 int mtu, ret = 0;
75 struct dst_entry *dst = skb_dst(skb);
76
77 mtu = dst_mtu(dst);
78 if (mtu < IPV6_MIN_MTU)
79 mtu = IPV6_MIN_MTU;
80
81 if (!skb->local_df && skb->len > mtu) {
81 if (!skb->ignore_df && skb->len > mtu) {
82 skb->dev = dst->dev;
83
84 if (xfrm6_local_dontfrag(skb))
85 xfrm6_local_rxpmtu(skb, mtu);
86 else if (skb->sk)
87 xfrm_local_error(skb, mtu);
88 else
89 icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu);

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115 return err;
116
117 memset(IP6CB(skb), 0, sizeof(*IP6CB(skb)));
118#ifdef CONFIG_NETFILTER
119 IP6CB(skb)->flags |= IP6SKB_XFRM_TRANSFORMED;
120#endif
121
122 skb->protocol = htons(ETH_P_IPV6);
82 skb->dev = dst->dev;
83
84 if (xfrm6_local_dontfrag(skb))
85 xfrm6_local_rxpmtu(skb, mtu);
86 else if (skb->sk)
87 xfrm_local_error(skb, mtu);
88 else
89 icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu);

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115 return err;
116
117 memset(IP6CB(skb), 0, sizeof(*IP6CB(skb)));
118#ifdef CONFIG_NETFILTER
119 IP6CB(skb)->flags |= IP6SKB_XFRM_TRANSFORMED;
120#endif
121
122 skb->protocol = htons(ETH_P_IPV6);
123 skb->local_df = 1;
123 skb->ignore_df = 1;
124
125 return x->outer_mode->output2(x, skb);
126}
127EXPORT_SYMBOL(xfrm6_prepare_output);
128
129int xfrm6_output_finish(struct sk_buff *skb)
130{
131#ifdef CONFIG_NETFILTER

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145 if (skb->protocol == htons(ETH_P_IPV6))
146 mtu = ip6_skb_dst_mtu(skb);
147 else
148 mtu = dst_mtu(skb_dst(skb));
149
150 if (skb->len > mtu && xfrm6_local_dontfrag(skb)) {
151 xfrm6_local_rxpmtu(skb, mtu);
152 return -EMSGSIZE;
124
125 return x->outer_mode->output2(x, skb);
126}
127EXPORT_SYMBOL(xfrm6_prepare_output);
128
129int xfrm6_output_finish(struct sk_buff *skb)
130{
131#ifdef CONFIG_NETFILTER

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145 if (skb->protocol == htons(ETH_P_IPV6))
146 mtu = ip6_skb_dst_mtu(skb);
147 else
148 mtu = dst_mtu(skb_dst(skb));
149
150 if (skb->len > mtu && xfrm6_local_dontfrag(skb)) {
151 xfrm6_local_rxpmtu(skb, mtu);
152 return -EMSGSIZE;
153 } else if (!skb->local_df && skb->len > mtu && skb->sk) {
153 } else if (!skb->ignore_df && skb->len > mtu && skb->sk) {
154 xfrm_local_error(skb, mtu);
155 return -EMSGSIZE;
156 }
157
158 if (x->props.mode == XFRM_MODE_TUNNEL &&
159 ((skb->len > mtu && !skb_is_gso(skb)) ||
160 dst_allfrag(skb_dst(skb)))) {
161 return ip6_fragment(skb, x->outer_mode->afinfo->output_finish);
162 }
163 return x->outer_mode->afinfo->output_finish(skb);
164}
165
166int xfrm6_output(struct sock *sk, struct sk_buff *skb)
167{
168 return NF_HOOK(NFPROTO_IPV6, NF_INET_POST_ROUTING, skb, NULL,
169 skb_dst(skb)->dev, __xfrm6_output);
170}
154 xfrm_local_error(skb, mtu);
155 return -EMSGSIZE;
156 }
157
158 if (x->props.mode == XFRM_MODE_TUNNEL &&
159 ((skb->len > mtu && !skb_is_gso(skb)) ||
160 dst_allfrag(skb_dst(skb)))) {
161 return ip6_fragment(skb, x->outer_mode->afinfo->output_finish);
162 }
163 return x->outer_mode->afinfo->output_finish(skb);
164}
165
166int xfrm6_output(struct sock *sk, struct sk_buff *skb)
167{
168 return NF_HOOK(NFPROTO_IPV6, NF_INET_POST_ROUTING, skb, NULL,
169 skb_dst(skb)->dev, __xfrm6_output);
170}