EdwardKing presented these words - circa 9/3/08 10:15 PM-> > I use TCP client to connect daytimesesrver which port is 13,I want to know > how to use tcpdump to view TCP advertised window? Where is the TCP advertised > window in the tcpdump result? > > Thanks >
When you run tcpdump, for tcp packets, look for the 'win' string. For example, looking at a pop3 stream I see - tcpdump -i rl0 -s 1500 tcp and port pop3 [...] 23:00:38.371059 IP 10.0.0.10.pop3 > 10.0.0.1.33656: P 13468:14292(824) ack 96 win 33304 <nop,nop,timestamp 246782562 2080639302> 23:00:38.373003 IP 10.0.0.1.33656 > 10.0.0.10.pop3: . ack 14292 win 65535 <nop,nop,timestamp 2080639302 246782562> 23:00:38.629916 IP 10.0.0.1.33656 > 10.0.0.10.pop3: P 96:104(8) ack 14292 win 65535 <nop,nop,timestamp 2080639302 246782562> 23:00:38.630021 IP 10.0.0.10.pop3 > 10.0.0.1.33656: P 14292:14325(33) ack 104 win 33304 <nop,nop,timestamp 246782588 2080639302> The "win" indicates the advertised window. So 10.0.0.10 is advertising a window of 33304 bytes and 10.0.0.1 is advertising a window of 65535 bytes. Try 'man tcpdump'. Patrick > > ---------------------------------------------------------------------------------------------- > Confidentiality Notice: The information contained in this e-mail and any > accompanying attachment(s) is intended only for the use of the intended > recipient and may be confidential and/or privileged of Neusoft Corporation, > its subsidiaries and/or its affiliates. If any reader of this communication > is not the intended recipient, unauthorized use, forwarding, printing, > storing, disclosure or copying is strictly prohibited, and may be unlawful. > If you have received this communication in error, please immediately notify > the sender by return e-mail, and delete the original message and all copies > from your system. Thank you. > ----------------------------------------------------------------------------------------------- > > _______________________________________________ > freebsd-questions@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to "[EMAIL PROTECTED]" > > _______________________________________________ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
