Wireshark mailing list archives
Getting sequence from TCP reassembled PDU
From: Pelayo Ramón <pelayor () gmail com>
Date: Fri, 16 Apr 2010 13:03:44 +0200
Hello. I am new to wireshark, and i have achieved some knolowdge about how it works, but I have problem I do not know how to resolve. To get a picture of the problem. Im developing a socket library to easy the development of simple server-multiple-client transmission . I has internal transmission flow control and a control channel via UDP. I am testing it by stressing the transmission trough a switched 100Mb ethernet with 11 clients sending 32MB to the server. The server is linux and the clients windows. To see the performance I am plotting the TCP sequence numbers against time of the different TCP streams. I have wireshark running in the server and in one client. The problem comes when the LAN is really overloaded and the switch begins to fill the queues. Wireshark begins to give "TCP reassembled PDU" in client capture and also in server capture. A small capture piece to ilustrate it: Client is the *.125 ip and server is the *.182 "337","8.070825","156.35.152.182","156.35.152.125","TCP","commplex-main
xrl [ACK] Seq=1 Ack=159445 Win=65535 Len=0"
"338","8.071070","156.35.152.182","156.35.152.125","TCP","commplex-main
xrl [ACK] Seq=1 Ack=162365 Win=65535 Len=0"
"339","8.071219","156.35.152.182","156.35.152.125","TCP","commplex-main
xrl [ACK] Seq=1 Ack=163845 Win=65535 Len=0"
"340","8.071429","156.35.152.182","156.35.152.125","TCP","commplex-main
xrl [ACK] Seq=1 Ack=166765 Win=65535 Len=0"
"341","8.071693","156.35.152.182","156.35.152.125","TCP","commplex-main
xrl [ACK] Seq=1 Ack=169685 Win=65535 Len=0"
"342","8.071942","156.35.152.182","156.35.152.125","TCP","commplex-main
xrl [ACK] Seq=1 Ack=172605 Win=65535 Len=0"
"343","8.072049","156.35.152.182","156.35.152.125","TCP","commplex-main
xrl [ACK] Seq=1 Ack=174085 Win=65535 Len=0"
"344","8.075711","156.35.152.125","156.35.152.182","TCP","[TCP segment of a reassembled PDU]" "345","8.075728","156.35.152.125","156.35.152.182","TCP","[TCP segment of a reassembled PDU]" "346","8.075742","156.35.152.125","156.35.152.182","TCP","[TCP segment of a reassembled PDU]" "347","8.075755","156.35.152.125","156.35.152.182","TCP","[TCP segment of a reassembled PDU]" "348","8.075767","156.35.152.125","156.35.152.182","TCP","[TCP segment of a reassembled PDU]" "349","8.075779","156.35.152.125","156.35.152.182","TCP","[TCP segment of a reassembled PDU]" "350","8.075790","156.35.152.125","156.35.152.182","TCP","[TCP segment of a reassembled PDU]" "351","8.075801","156.35.152.125","156.35.152.182","TCP","[TCP segment of a reassembled PDU]" "352","8.076314","156.35.152.182","156.35.152.125","TCP","commplex-main
xrl [ACK] Seq=1 Ack=177005 Win=65535 Len=0"
"353","8.076586","156.35.152.182","156.35.152.125","TCP","commplex-main
xrl [ACK] Seq=1 Ack=179925 Win=65535 Len=0"
"354","8.076814","156.35.152.182","156.35.152.125","TCP","commplex-main
xrl [ACK] Seq=1 Ack=182845 Win=65535 Len=0"
"355","8.076942","156.35.152.182","156.35.152.125","TCP","commplex-main
xrl [ACK] Seq=1 Ack=184325 Win=65535 Len=0"
reassemble TCP streams is on. What can i do to get the sequence number of those TCP segments? Thanks in advance. ___________________________________________________________________________ Sent via: Wireshark-users mailing list <wireshark-users () wireshark org> Archives: http://www.wireshark.org/lists/wireshark-users Unsubscribe: https://wireshark.org/mailman/options/wireshark-users mailto:wireshark-users-request () wireshark org?subject=unsubscribe
Current thread:
- Getting sequence from TCP reassembled PDU Pelayo Ramón (Apr 16)
- Re: Getting sequence from TCP reassembled PDU Martin Visser (Apr 16)