Date: Wed, 10 Jun 2009 19:17:13 +0530 (IST) From: saravana perumal <seesaravanan@yahoo.co.in> To: freebsd-net@freebsd.org Cc: sarbalas@gmail.com Subject: TCP Free-BSD setup behaviour. Message-ID: <28959.63465.qm@web8313.mail.in.yahoo.com>
next in thread | raw e-mail | index | archive | help
Hi , Have some behaviour change with FREEBSD compared to LINUX . 1. When sending the Same TCP packet once again [ Retranmission of TCP packet ] Whether the Same Identification field [ IP packet]used or not . but when seeing that thru packet capture, Free BSD sending the differnt one [ increases sequentially IP Identification] 2.Retranmission Time is not increasing Linearly with Respect to BSD. not keeping more time interval . AS per RFC expecting Retransmission timeout should increase Linearly. Issue is not seen with Linux Setup 3. Active SYN open state in FREE BSD setup , Does not reach Syn-received State. When Sending syn packet to DUT but for that FreeBSD is not sending back SYN/ACK . Issue is with Free BSD Setup.Linux works fine, 4.When checking the State - TIME-WAIT Sending FIN and expecting the ACK ;Getting the ACK properly. Sending Data Segment and Expecting the RST signal not getting the RST ; Instead DUT is sending the Last TCP packet. Issue seen only in Free BSD. Same issue in FIN-WAIT2 & FIN-WAIT1 State also . Sending FIN and Expect the ACK : Getting the ACK Sending Data segment with Data : Expecting the RST signal from DUT ; but got Last transmitted TCP packet[ FIN -ACK] Any idea about the above scenario would be helpful Thanks, Saravanan.
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?28959.63465.qm>