Commit 7f53878d authored Dec 07, 2007 by Mitsuru Chinen Committed by David S. Miller Dec 07, 2007

[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>

parent ca46f9c8

net/ipv4/route.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -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;

		/*

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