From: "Yurij M. Plotnikov" <Yurij.Plotnikov@oktetlabs.ru>
To: netdev@vger.kernel.org
Cc: "Alexandra N. Kossovsky" <Alexandra.Kossovsky@oktetlabs.ru>
Subject: TCP socket receives strange packet
Date: Tue, 14 Oct 2014 18:09:54 +0400 [thread overview]
Message-ID: <543D2EB2.4000009@oktetlabs.ru> (raw)
[-- Attachment #1: Type: text/plain, Size: 736 bytes --]
Connected TCP socket receives packet without timestamps option which
exists in SYN, SYNACK and ACK. It is packet 4 in attached tcpdump output.
tcpdump output description: The host has address 10.208.10.1 (server)
and the peer host has address 10.208.10.2 (client).
Establishing connection: Timestamps option exists in SYN, SYNACK and ACK
(packets 1, 2 and 3 in attached file), so accepted socket should receive
packets only with timestamps option.
Sending packet: the socket receives the packet without timestamps option
(packet 4 in attached file), i.e. recv() function called on the socket
receives the data from the packet. The "strange" packet is generated
using PCAP.
I see this behaviour on 2.6.26 and on 3.14 kernels.
[-- Attachment #2: pcap_with_bad_packet --]
[-- Type: application/octet-stream, Size: 866 bytes --]
next reply other threads:[~2014-10-14 14:19 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-10-14 14:09 Yurij M. Plotnikov [this message]
2014-10-14 15:00 ` TCP socket receives strange packet Eric Dumazet
2014-10-14 15:40 ` John Heffner
2014-10-14 16:41 ` Christoph Paasch
2014-10-14 16:50 ` David Miller
2014-10-14 16:54 ` Christoph Paasch
2014-10-14 16:32 ` David Miller
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