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Date: Thu, 15 Nov 2007 20:04:31 -0800 (PST) From: David Miller <davem@...emloft.net> To: wangchen@...fujitsu.com Cc: netdev@...r.kernel.org Subject: Re: [PATCH 1/2] [IPV4] UDP: Always checksum even if without socket filter From: Wang Chen <wangchen@...fujitsu.com> Date: Fri, 16 Nov 2007 11:18:16 +0800 > Actually, I tested and found this issue. > I sent 50 udp packets, which have wrong checksum, to my > machine. > Before the patch being applied, /proc/net/snmp's udp > InDatagrams increased, and InErrors didn't increase. > After the patch being applied, InErrors increased correctly > and InDatagrams stayed unchanging. That's right, InDataGrams will increase even if we haven't verified the checksum yet. When the user does a recvmsg() or a poll() on the socket, we will notice the bad checksum then and increment InErrors. We could in this case correct the InDatagrams counter by decrementing it in this case. - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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