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[coLinux-devel] [ colinux-Bugs-2830278 ] Incorrect chksum of tcp packets.
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From: SourceForge.net <no...@so...> - 2009-08-01 12:23:40
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Bugs item #2830278, was opened at 2009-07-31 14:00 Message generated for change (Comment added) made by henryn You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=622063&aid=2830278&group_id=98788 Please note that this message will contain a full copy of the comment thread, including the initial issue submission, for this request, not just the latest update. Category: Linux Kernel Group: v0.7.x (release) >Status: Closed >Resolution: Duplicate Priority: 5 Private: No Submitted By: Nobody/Anonymous (nobody) Assigned to: Nobody/Anonymous (nobody) Summary: Incorrect chksum of tcp packets. Initial Comment: In these days I installed colinux 0.74 on my windowsXP host. Everythig is ok except a strange problem about networking. I use "ndis-bridge" to connect a debian guest in colinux with the outer world, but whenever i connect from my host XP to a http or ssh server in the guest debian, a Incorrect chksum apears and the connection can not establish. On the other hand, visiting internet websites in debian is ok, and PING debian from my host XP is also ok. This problem confused me for days, following is the tcpdump output in my guest debian: 19:42:05.746243 IP (tos 0x0, ttl 128, id 15734, offset 0, flags [DF], proto TCP (6), length 48) dudu.1598 > cl.www: S, cksum 0x4f9d (correct), 514034366:514034366(0) win 65535 <mss 1460,nop,nop,sackOK> 0x0000: 00d0 f801 0101 001b 3805 a9d4 0800 4500 ........8.....E. 0x0010: 0030 3d76 4000 8006 39bf c0a8 010b c0a8 .0=v@...9....... 0x0020: 0137 063e 0050 1ea3 8abe 0000 0000 7002 .7.>.P........p. 0x0030: ffff 4f9d 0000 0204 05b4 0101 0402 ..O........... 19:42:05.756243 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto TCP (6), length 48) cl.www > dudu.1598: S, cksum 0xa5bb (correct), 4231763652:4231763652(0) ack 514034367 win 5840 <mss 1460,nop,nop,sackOK> 0x0000: 001b 3805 a9d4 00d0 f801 0101 0800 4500 ..8...........E. 0x0010: 0030 0000 4000 4006 b735 c0a8 0137 c0a8 .0..@.@..5...7.. 0x0020: 010b 0050 063e fc3b 96c4 1ea3 8abf 7012 ...P.>.;......p. 0x0030: 16d0 a5bb 0000 0204 05b4 0101 0402 .............. 19:42:05.746243 IP (tos 0x0, ttl 128, id 15735, offset 0, flags [DF], proto TCP (6), length 40) dudu.1598 > cl.www: ., cksum 0x83ad (incorrect (-> 0xe94f), 1:1(0) ack 1 win 65535 0x0000: 00d0 f801 0101 001b 3805 a9d4 0800 4500 ........8.....E. 0x0010: 0028 3d77 4000 8006 39c6 c0a8 010b c0a8 .(=w@...9....... 0x0020: 0137 063e 0050 1ea3 8abf fc3b 96c5 5010 .7.>.P.....;..P. 0x0030: ffff 83ad 0000 ...... 19:42:05.756243 IP (tos 0x0, ttl 128, id 15737, offset 0, flags [DF], proto TCP (6), length 130) dudu.1598 > cl.www: P 1:91(90) ack 1 win 65535 0x0000: 00d0 f801 0101 001b 3805 a9d4 0800 4500 ........8.....E. 0x0010: 0082 3d79 4000 8006 396a c0a8 010b c0a8 ..=y@...9j...... 0x0020: 0137 063e 0050 1ea3 8abf fc3b 96c5 5018 .7.>.P.....;..P. 0x0030: ffff 8407 0000 4745 5420 2f20 4854 5450 ......GET./.HTTP 0x0040: 2f31 2e30 0d0a 5573 6572 2d41 6765 6e74 /1.0..User-Agent 0x0050: 3a20 5767 6574 2f31 2e31 312e 310d 0a41 :.Wget/1.11.1..A 19:42:08.666287 IP (tos 0x0, ttl 128, id 15761, offset 0, flags [DF], proto TCP (6), length 130) dudu.1598 > cl.www: P 1:91(90) ack 1 win 65535 0x0000: 00d0 f801 0101 001b 3805 a9d4 0800 4500 ........8.....E. 0x0010: 0082 3d91 4000 8006 3952 c0a8 010b c0a8 ..=.@...9R...... 0x0020: 0137 063e 0050 1ea3 8abf fc3b 96c5 5018 .7.>.P.....;..P. 0x0030: ffff 8407 0000 4745 5420 2f20 4854 5450 ......GET./.HTTP 0x0040: 2f31 2e30 0d0a 5573 6572 2d41 6765 6e74 /1.0..User-Agent 0x0050: 3a20 5767 6574 2f31 2e31 312e 310d 0a41 :.Wget/1.11.1..A 19:42:09.146294 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto TCP (6), length 48) cl.www > dudu.1598: S, cksum 0xa5bb (correct), 4231763652:4231763652(0) ack 514034367 win 5840 <mss 1460,nop,nop,sackOK> 0x0000: 001b 3805 a9d4 00d0 f801 0101 0800 4500 ..8...........E. 0x0010: 0030 0000 4000 4006 b735 c0a8 0137 c0a8 .0..@.@..5...7.. 0x0020: 010b 0050 063e fc3b 96c4 1ea3 8abf 7012 ...P.>.;......p. 0x0030: 16d0 a5bb 0000 0204 05b4 0101 0402 .............. 19:42:09.146294 IP (tos 0x0, ttl 128, id 15762, offset 0, flags [DF], proto TCP (6), length 40) dudu.1598 > cl.www: ., cksum 0x83ad (incorrect (-> 0xe8f5), 91:91(0) ack 1 win 65535 0x0000: 00d0 f801 0101 001b 3805 a9d4 0800 4500 ........8.....E. 0x0010: 0028 3d92 4000 8006 39ab c0a8 010b c0a8 .(=.@...9....... 0x0020: 0137 063e 0050 1ea3 8b19 fc3b 96c5 5010 .7.>.P.....;..P. 0x0030: ffff 83ad 0000 ...... 19:42:14.656377 IP (tos 0x0, ttl 128, id 15795, offset 0, flags [DF], proto TCP (6), length 130) dudu.1598 > cl.www: P 1:91(90) ack 1 win 65535 0x0000: 00d0 f801 0101 001b 3805 a9d4 0800 4500 ........8.....E. 0x0010: 0082 3db3 4000 8006 3930 c0a8 010b c0a8 ..=.@...90...... 0x0020: 0137 063e 0050 1ea3 8abf fc3b 96c5 5018 .7.>.P.....;..P. 0x0030: ffff 8407 0000 4745 5420 2f20 4854 5450 ......GET./.HTTP 0x0040: 2f31 2e30 0d0a 5573 6572 2d41 6765 6e74 /1.0..User-Agent 0x0050: 3a20 5767 6574 2f31 2e31 312e 310d 0a41 :.Wget/1.11.1..A 19:42:15.146385 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto TCP (6), length 48) cl.www > dudu.1598: S, cksum 0xa5bb (correct), 4231763652:4231763652(0) ack 514034367 win 5840 <mss 1460,nop,nop,sackOK> 0x0000: 001b 3805 a9d4 00d0 f801 0101 0800 4500 ..8...........E. 0x0010: 0030 0000 4000 4006 b735 c0a8 0137 c0a8 .0..@.@..5...7.. 0x0020: 010b 0050 063e fc3b 96c4 1ea3 8abf 7012 ...P.>.;......p. 0x0030: 16d0 a5bb 0000 0204 05b4 0101 0402 .............. 19:42:15.146385 IP (tos 0x0, ttl 128, id 15796, offset 0, flags [DF], proto TCP (6), length 40) dudu.1598 > cl.www: ., cksum 0x83ad (incorrect (-> 0xe8f5), 91:91(0) ack 1 win 65535 0x0000: 00d0 f801 0101 001b 3805 a9d4 0800 4500 ........8.....E. 0x0010: 0028 3db4 4000 8006 3989 c0a8 010b c0a8 .(=.@...9....... 0x0020: 0137 063e 0050 1ea3 8b19 fc3b 96c5 5010 .7.>.P.....;..P. 0x0030: ffff 83ad 0000 ...... 19:42:26.646558 IP (tos 0x0, ttl 128, id 15863, offset 0, flags [DF], proto TCP (6), length 130) dudu.1598 > cl.www: P 1:91(90) ack 1 win 65535 0x0000: 00d0 f801 0101 001b 3805 a9d4 0800 4500 ........8.....E. 0x0010: 0082 3df7 4000 8006 38ec c0a8 010b c0a8 ..=.@...8....... 0x0020: 0137 063e 0050 1ea3 8abf fc3b 96c5 5018 .7.>.P.....;..P. 0x0030: ffff 8407 0000 4745 5420 2f20 4854 5450 ......GET./.HTTP 0x0040: 2f31 2e30 0d0a 5573 6572 2d41 6765 6e74 /1.0..User-Agent 0x0050: 3a20 5767 6574 2f31 2e31 312e 310d 0a41 :.Wget/1.11.1..A 19:42:27.146566 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto TCP (6), length 48) cl.www > dudu.1598: S, cksum 0xa5bb (correct), 4231763652:4231763652(0) ack 514034367 win 5840 <mss 1460,nop,nop,sackOK> 0x0000: 001b 3805 a9d4 00d0 f801 0101 0800 4500 ..8...........E. 0x0010: 0030 0000 4000 4006 b735 c0a8 0137 c0a8 .0..@.@..5...7.. 0x0020: 010b 0050 063e fc3b 96c4 1ea3 8abf 7012 ...P.>.;......p. 0x0030: 16d0 a5bb 0000 0204 05b4 0101 0402 .............. ---------------------------------------------------------------------- >Comment By: Henry N. (henryn) Date: 2009-08-01 14:23 Message: Please see Bug# 2688891: To make it usable, go into network card "Hardware options" - "Extensions" - Properties: "Checksum" - and change the Value into "Disable". ---------------------------------------------------------------------- You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=622063&aid=2830278&group_id=98788 |