netdev - [PATCH 3/6] [IPV4] SNMP: Support InTruncatedPkts

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Message-Id: <20070417201337.3d48b86a.mitch@linux.vnet.ibm.com>
Date:	Tue, 17 Apr 2007 20:13:37 +0900
From:	Mitsuru Chinen <mitch@...ux.vnet.ibm.com>
To:	netdev@...r.kernel.org
Cc:	Mitsuru Chinen <mitch@...ux.vnet.ibm.com>
Subject: [PATCH 3/6] [IPV4] SNMP: Support InTruncatedPkts

An IP datagram which is being discarded because the datagram frame
didn't carry enough data should be counted as InTruncatedPkts.

Signed-off-by: Mitsuru Chinen <mitch@...ux.vnet.ibm.com>
---
 net/ipv4/ip_input.c |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)

diff --git a/net/ipv4/ip_input.c b/net/ipv4/ip_input.c
index 63ab523..c8c455d 100644
--- a/net/ipv4/ip_input.c
+++ b/net/ipv4/ip_input.c
@@ -416,7 +416,10 @@ int ip_rcv(struct sk_buff *skb, struct n
 		goto inhdr_error;
 
 	len = ntohs(iph->tot_len);
-	if (skb->len < len || len < (iph->ihl*4))
+	if (skb->len < len) {
+		IP_INC_STATS_BH(IPSTATS_MIB_INTRUNCATEDPKTS);
+		goto drop;
+	} else if (len < (iph->ihl*4))
 		goto inhdr_error;
 
 	/* Our transport medium may have padded the buffer out. Now we know it
-- 
1.4.3.4

-
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