aboutsummaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
-rw-r--r--net/ipv4/ip_forward.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/net/ipv4/ip_forward.c b/net/ipv4/ip_forward.c
index 467ebedb99ba..61b30d100676 100644
--- a/net/ipv4/ip_forward.c
+++ b/net/ipv4/ip_forward.c
@@ -85,6 +85,14 @@ int ip_forward(struct sk_buff *skb)
85 if (opt->is_strictroute && rt->rt_dst != rt->rt_gateway) 85 if (opt->is_strictroute && rt->rt_dst != rt->rt_gateway)
86 goto sr_failed; 86 goto sr_failed;
87 87
88 if (unlikely(skb->len > dst_mtu(&rt->u.dst) &&
89 (ip_hdr(skb)->frag_off & htons(IP_DF))) && !skb->local_df) {
90 IP_INC_STATS(IPSTATS_MIB_FRAGFAILS);
91 icmp_send(skb, ICMP_DEST_UNREACH, ICMP_FRAG_NEEDED,
92 htonl(dst_mtu(&rt->u.dst)));
93 goto drop;
94 }
95
88 /* We are about to mangle packet. Copy it! */ 96 /* We are about to mangle packet. Copy it! */
89 if (skb_cow(skb, LL_RESERVED_SPACE(rt->u.dst.dev)+rt->u.dst.header_len)) 97 if (skb_cow(skb, LL_RESERVED_SPACE(rt->u.dst.dev)+rt->u.dst.header_len))
90 goto drop; 98 goto drop;