Date: Mon, 24 Jun 2002 08:38:44 -0700 (PDT) From: Daniel Huang <dhuang@qobra.com> To: freebsd-gnats-submit@FreeBSD.org Subject: misc/39787: T/TCP support Message-ID: <200206241538.g5OFci6O085927@www.freebsd.org>
next in thread | raw e-mail | index | archive | help
>Number: 39787 >Category: misc >Synopsis: T/TCP support >Confidential: no >Severity: non-critical >Priority: low >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Mon Jun 24 08:40:01 PDT 2002 >Closed-Date: >Last-Modified: >Originator: Daniel Huang >Release: FreeBSD 4.5 >Organization: Qobra Systems Inc. >Environment: FreeBSD 4.5-RELEASE FreeBSD 4.5-RELEASE #0: Mon Jan 28 14:31:56 GMT 2002 murray@builder.freebsdmall.com:/usr/src/sys/compile/GENERIC i386 >Description: I tested the T/TCP by using the source code in <T/TCP Illustrated Volume 3> on FreeBsd 4.5. The tcpdump result as below: 09:49:10.957632 dhcp189.tor.qobra.net.1026 > dhcp189.tor.qobra.net.1028: SFP 3873691517:3873691817(300) win 65535 <mss 16344,nop,nop,ccnew 7> (DF) 09:49:10.957748 dhcp189.tor.qobra.net.1028 > dhcp189.tor.qobra.net.1026: S 2495134045:2495134045(0) ack 3873691518 win 65535 <mss 16344, nop, nop, cc 8, nop,nop,ccecho 7> 09:49:10.957782 dhcp189.tor.qobra.net.1026 > dhcp189.tor.qobra.net.1028: F 301:301(0) ack 1 win 65535 <nop,nop,cc 7> (DF) 09:49:10.957834 dhcp189.tor.qobra.net.1028 > dhcp189.tor.qobra.net.1026: ack 1 win 65535 <nop,nop,cc 8> (DF) 09:49:11.950539 dhcp189.tor.qobra.net.1026 > dhcp189.tor.qobra.net.1028: FP 1:301(300) ack 1 win 65535 <nop,nop,cc 7> (DF) 09:49:11.950578 dhcp189.tor.qobra.net.1028 > dhcp189.tor.qobra.net.1026: ack 302 win 65535 <nop,nop,cc 8> (DF) 09:49:11.950750 dhcp189.tor.qobra.net.1028 > dhcp189.tor.qobra.net.1026: FP 1:401(400) ack 302 win 65535 <nop,nop,cc 8> (DF) 09:49:11.950768 dhcp189.tor.qobra.net.1026 > dhcp189.tor.qobra.net.1028: ack 402 win 65535 <nop,nop,cc 7> (DF) The client sent 300 bytes to server, and server reply 400 bytes to client. It seems that step 4 and 5 are wrong, but I don't know why. I set rfc1644 on(1) and rfc1323 off(0), why step 4 sends wrong ACK and step 5 resend the message to server. Furthermore, I couldn't get the normal T/TCP transaction result -- just 3 segments, for my test it's seem with the upper tcpdump. Could you please give me some advice? I appreciate. >How-To-Repeat: Simply use the example T/TCP client/server source code in <TCP/IP Illustrated, Volume 3> P.17, P.18 >Fix: >Release-Note: >Audit-Trail: >Unformatted: To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-bugs" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200206241538.g5OFci6O085927>