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authorMitsuru Chinen <mitch@linux.vnet.ibm.com>2007-12-07 01:07:24 -0800
committerDavid S. Miller <davem@davemloft.net>2007-12-07 01:07:24 -0800
commit7f53878dc2618bf7c01e2135bd271ac01bd85dc9 (patch)
tree9a0f0d7dcb2aba668f423b2f5392ab5ec290ec8f
parentca46f9c834913fc5d5c196d70673375cdaba6b56 (diff)
[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 <mitch@linux.vnet.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--net/ipv4/route.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index c426dec6d57..79c4b9360a1 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;
/*