From 7f53878dc2618bf7c01e2135bd271ac01bd85dc9 Mon Sep 17 00:00:00 2001 From: Mitsuru Chinen Date: Fri, 7 Dec 2007 01:07:24 -0800 Subject: [PATCH] [IPv4]: Reply net unreachable ICMP message IPv4 stack doesn't reply any ICMP destination unreachable message with net unreachable code when IP detagrams are being discarded because of no route could be found in the forwarding path. Incidentally, IPv6 stack replies such ICMPv6 message in the similar situation. Signed-off-by: Mitsuru Chinen Signed-off-by: David S. Miller --- net/ipv4/route.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/net/ipv4/route.c b/net/ipv4/route.c index c426dec6d579..79c4b9360a12 100644 --- a/net/ipv4/route.c +++ b/net/ipv4/route.c @@ -1252,6 +1252,7 @@ static int ip_error(struct sk_buff *skb) break; case ENETUNREACH: code = ICMP_NET_UNREACH; + IP_INC_STATS_BH(IPSTATS_MIB_INNOROUTES); break; case EACCES: code = ICMP_PKT_FILTERED; @@ -1881,6 +1882,8 @@ no_route: RT_CACHE_STAT_INC(in_no_route); spec_dst = inet_select_addr(dev, 0, RT_SCOPE_UNIVERSE); res.type = RTN_UNREACHABLE; + if (err == -ESRCH) + err = -ENETUNREACH; goto local_input; /* -- 2.20.1