Date: Tue, 23 Nov 1999 16:19:20 -0800 From: jayanth <jayanth@yahoo-inc.com> To: freebsd-net@FreeBSD.ORG Subject: peculiar tcp behavior Message-ID: <383B2F08.5B2B4D38@yahoo-inc.com>
next in thread | raw e-mail | index | archive | help
hi, I have a tcpdump below. If a Reset segment is received that is greater than "last_ack_sent" the FreeBSD 2.2.8 tcpip stack does not process the segment and drop the connection. Is the sender(a.b.c.d) of the Reset wrong in sending a Reset that is within the window but greater than our "last_ack_sent "? Since the connection is not dropped the x.y.z.w host has retransmit timeouts. What is the correct behavior ? tcpdump -------- 13:54:45.130913 a.b.c.d.1038 > x.y.z.w.http: S 2478243840:2478243840(0) win 2048 <mss 1460> (DF) 13:54:45.130969 x.y.z.w.http > a.b.c.d.1038: S 876676280:876676280(0) ack 2478243841 win 17520 <mss 1460> (DF) 13:54:45.131869 a.b.c.d.1038 > x.y.z.w.http: P 1:78(77) ack 1 win 2048 (DF) 13:54:45.161755 x.y.z.w.http > a.b.c.d.1038: . ack 78 win 17520 (DF) 13:54:45.352783 x.y.z.w.http > a.b.c.d.1038: P 1:210(209) ack 78 win 17520 (DF) 13:54:45.353055 x.y.z.w.http > a.b.c.d.1038: F 210:210(0) ack 78 win 17520 (DF) ???????????? 13:54:45.353119 a.b.c.d.1038 > x.y.z.w.http: R 2478261437:2478261437(0) ^^^^^^^^^^^^^^^^^^^^^ win 1 (DF) ??????????? 13:54:46.561619 x.y.z.w.http > a.b.c.d.1038: FP 1:210(209) ack 78 win 17520 (DF) 13:54:49.561403 x.y.z.w.http > a.b.c.d.1038: FP 1:210(209) ack 78 win 17520 (DF) 13:54:55.560988 x.y.z.w.http > a.b.c.d.1038: FP 1:210(209) ack 78 win 17520 (DF) .................. thanks jayanth To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?383B2F08.5B2B4D38>