diff options
Diffstat (limited to 'net/ipv4/ip_output.c')
| -rw-r--r-- | net/ipv4/ip_output.c | 17 |
1 files changed, 10 insertions, 7 deletions
diff --git a/net/ipv4/ip_output.c b/net/ipv4/ip_output.c index 912402752f2f..8971780aec7c 100644 --- a/net/ipv4/ip_output.c +++ b/net/ipv4/ip_output.c @@ -449,6 +449,7 @@ int ip_fragment(struct sk_buff *skb, int (*output)(struct sk_buff *)) __be16 not_last_frag; struct rtable *rt = skb_rtable(skb); int err = 0; + bool forwarding = IPCB(skb)->flags & IPSKB_FORWARDED; dev = rt->dst.dev; @@ -458,12 +459,13 @@ int ip_fragment(struct sk_buff *skb, int (*output)(struct sk_buff *)) iph = ip_hdr(skb); + mtu = ip_dst_mtu_maybe_forward(&rt->dst, forwarding); if (unlikely(((iph->frag_off & htons(IP_DF)) && !skb->local_df) || (IPCB(skb)->frag_max_size && - IPCB(skb)->frag_max_size > dst_mtu(&rt->dst)))) { + IPCB(skb)->frag_max_size > mtu))) { IP_INC_STATS(dev_net(dev), IPSTATS_MIB_FRAGFAILS); icmp_send(skb, ICMP_DEST_UNREACH, ICMP_FRAG_NEEDED, - htonl(ip_skb_dst_mtu(skb))); + htonl(mtu)); kfree_skb(skb); return -EMSGSIZE; } @@ -473,7 +475,7 @@ int ip_fragment(struct sk_buff *skb, int (*output)(struct sk_buff *)) */ hlen = iph->ihl * 4; - mtu = dst_mtu(&rt->dst) - hlen; /* Size of data space */ + mtu = mtu - hlen; /* Size of data space */ #ifdef CONFIG_BRIDGE_NETFILTER if (skb->nf_bridge) mtu -= nf_bridge_mtu_reduction(skb); @@ -828,7 +830,7 @@ static int __ip_append_data(struct sock *sk, if (cork->length + length > maxnonfragsize - fragheaderlen) { ip_local_error(sk, EMSGSIZE, fl4->daddr, inet->inet_dport, - mtu-exthdrlen); + mtu - (opt ? opt->optlen : 0)); return -EMSGSIZE; } @@ -1151,7 +1153,8 @@ ssize_t ip_append_page(struct sock *sk, struct flowi4 *fl4, struct page *page, mtu : 0xFFFF; if (cork->length + size > maxnonfragsize - fragheaderlen) { - ip_local_error(sk, EMSGSIZE, fl4->daddr, inet->inet_dport, mtu); + ip_local_error(sk, EMSGSIZE, fl4->daddr, inet->inet_dport, + mtu - (opt ? opt->optlen : 0)); return -EMSGSIZE; } @@ -1550,7 +1553,7 @@ void __init ip_init(void) ip_rt_init(); inet_initpeers(); -#if defined(CONFIG_IP_MULTICAST) && defined(CONFIG_PROC_FS) - igmp_mc_proc_init(); +#if defined(CONFIG_IP_MULTICAST) + igmp_mc_init(); #endif } |