On Saturday 29 March 2008 15:11, conn intel wrote:
> Dear Denys Vlasenko,
>
> Please find the attached file "FileUpload.raw", packet log using wireshark.
>
> I have taken log from PC host, and tried to upload a file with name
> "music.bmp" having size around 18 KB. Its still uploads 4KB with one stroke
> and delays the upload process.
I don't see it happening. Actually, log shows healthy and fast upload
of entire file. Firefox pushing full-sized (1448 bytes packets)
they get ack'ed, and entire upload ends successfully in ~0.03 seconds:
21:10:05.793692 IP 192.168.0.88.51763 > 192.168.0.238.80: S
2508189265:2508189265(0) win 5840 <mss 1460,sackOK,timestamp 7886166
0,nop,wscale 7>
21:10:05.794447 IP 192.168.0.238.80 > 192.168.0.88.51763: S
826553832:826553832(0) ack 2508189266 win 5792 <mss 1460,sackOK,timestamp
260732 7886166,nop,wscale 7>
21:10:05.794477 IP 192.168.0.88.51763 > 192.168.0.238.80: . ack 1 win 46
<nop,nop,timestamp 7886167 260732>
21:10:05.795025 IP 192.168.0.88.51763 > 192.168.0.238.80: P 1:498(497) ack 1
win 46 <nop,nop,timestamp 7886167 260732>
21:10:05.795088 IP 192.168.0.88.51763 > 192.168.0.238.80: . 498:1946(1448) ack
1 win 46 <nop,nop,timestamp 7886167 260732>
21:10:05.796880 IP 192.168.0.238.80 > 192.168.0.88.51763: . ack 498 win 54
<nop,nop,timestamp 260732 7886167>
21:10:05.796906 IP 192.168.0.88.51763 > 192.168.0.238.80: . 1946:3394(1448) ack
1 win 46 <nop,nop,timestamp 7886168 260732>
21:10:05.797043 IP 192.168.0.88.51763 > 192.168.0.238.80: . 3394:4842(1448) ack
1 win 46 <nop,nop,timestamp 7886168 260732>
21:10:05.798389 IP 192.168.0.238.80 > 192.168.0.88.51763: . ack 1946 win 77
<nop,nop,timestamp 260732 7886167>
21:10:05.798459 IP 192.168.0.88.51763 > 192.168.0.238.80: . 4842:6290(1448) ack
1 win 46 <nop,nop,timestamp 7886168 260732>
21:10:05.798599 IP 192.168.0.88.51763 > 192.168.0.238.80: P 6290:7738(1448) ack
1 win 46 <nop,nop,timestamp 7886168 260732>
21:10:05.799760 IP 192.168.0.238.80 > 192.168.0.88.51763: . ack 3394 win 99
<nop,nop,timestamp 260732 7886168>
21:10:05.799835 IP 192.168.0.88.51763 > 192.168.0.238.80: . 7738:9186(1448) ack
1 win 46 <nop,nop,timestamp 7886168 260732>
21:10:05.799977 IP 192.168.0.88.51763 > 192.168.0.238.80: . 9186:10634(1448)
ack 1 win 46 <nop,nop,timestamp 7886168 260732>
21:10:05.804889 IP 192.168.0.238.80 > 192.168.0.88.51763: . ack 4842 win 122
<nop,nop,timestamp 260732 7886168>
21:10:05.804938 IP 192.168.0.88.51763 > 192.168.0.238.80: P 10634:12082(1448)
ack 1 win 46 <nop,nop,timestamp 7886170 260732>
21:10:05.804957 IP 192.168.0.238.80 > 192.168.0.88.51763: . ack 6290 win 145
<nop,nop,timestamp 260732 7886168>
21:10:05.805028 IP 192.168.0.238.80 > 192.168.0.88.51763: . ack 7738 win 167
<nop,nop,timestamp 260733 7886168>
21:10:05.805100 IP 192.168.0.238.80 > 192.168.0.88.51763: . ack 9186 win 190
<nop,nop,timestamp 260733 7886168>
21:10:05.805124 IP 192.168.0.88.51763 > 192.168.0.238.80: . 12082:13530(1448)
ack 1 win 46 <nop,nop,timestamp 7886170 260733>
21:10:05.805262 IP 192.168.0.88.51763 > 192.168.0.238.80: . 13530:14978(1448)
ack 1 win 46 <nop,nop,timestamp 7886170 260733>
21:10:05.805400 IP 192.168.0.88.51763 > 192.168.0.238.80: P 14978:16178(1200)
ack 1 win 46 <nop,nop,timestamp 7886170 260733>
21:10:05.805518 IP 192.168.0.88.51763 > 192.168.0.238.80: . 16178:17626(1448)
ack 1 win 46 <nop,nop,timestamp 7886170 260733>
21:10:05.806437 IP 192.168.0.238.80 > 192.168.0.88.51763: . ack 10634 win 207
<nop,nop,timestamp 260733 7886168>
21:10:05.806456 IP 192.168.0.88.51763 > 192.168.0.238.80: . 17626:19074(1448)
ack 1 win 46 <nop,nop,timestamp 7886170 260733>
21:10:05.807846 IP 192.168.0.238.80 > 192.168.0.88.51763: . ack 12082 win 197
<nop,nop,timestamp 260733 7886170>
21:10:05.810243 IP 192.168.0.238.80 > 192.168.0.88.51763: . ack 13530 win 187
<nop,nop,timestamp 260733 7886170>
21:10:05.810386 IP 192.168.0.238.80 > 192.168.0.88.51763: . ack 14978 win 177
<nop,nop,timestamp 260733 7886170>
21:10:05.811934 IP 192.168.0.238.80 > 192.168.0.88.51763: . ack 16178 win 169
<nop,nop,timestamp 260733 7886170>
21:10:05.811967 IP 192.168.0.88.51763 > 192.168.0.238.80: P 19074:19454(380)
ack 1 win 46 <nop,nop,timestamp 7886171 260733>
21:10:05.819985 IP 192.168.0.238.80 > 192.168.0.88.51763: . ack 19454 win 175
<nop,nop,timestamp 260734 7886170>
I will show last two packets in full below.
21:10:05.811967 IP 192.168.0.88.51763 > 192.168.0.238.80: P 19074:19454(380)
ack 1 win 46 <nop,nop,timestamp 7886171 260733>
0x0000: 4500 01b0 bb17 4000 4006 fb99 c0a8 0058 [EMAIL
PROTECTED]@......X
0x0010: c0a8 00ee ca33 0050 9580 38d3 3144 35e9 .....3.P..8.1D5.
....
0x0190: 3134 3433 3439 3139 3936 3933 3133 3139 1443491996931319
0x01a0: 3638 3531 3537 3630 3831 3135 2d2d 0d0a 685157608115--..
21:10:05.819985 IP 192.168.0.238.80 > 192.168.0.88.51763: . ack 19454 win 175
<nop,nop,timestamp 260734 7886170>
0x0000: 4500 0034 cfa1 4000 4006 e88b c0a8 00ee [EMAIL
PROTECTED]@.......
0x0010: c0a8 0058 0050 ca33 3144 35e9 9580 3a4f ...X.P.31D5...:O
0x0020: 8010 00af a1a2 0000 0101 080a 0003 fa7e ...............~
0x0030: 0078 555a .xUZ
What follows is a bit strange: server says "200 OK":
21:10:09.519821 IP 192.168.0.238.80 > 192.168.0.88.51763: P 1:18(17) ack 19454
win 212 <nop,nop,timestamp 261105 7886170>
0x0000: 4500 0045 cfa2 4000 4006 e879 c0a8 00ee [EMAIL
PROTECTED]@..y....
0x0010: c0a8 0058 0050 ca33 3144 35e9 9580 3a4f ...X.P.31D5...:O
0x0020: 8018 00d4 e02c 0000 0101 080a 0003 fbf1 .....,..........
0x0030: 0078 555a 4854 5450 2f31 2e30 2032 3030 .xUZHTTP/1.0.200
0x0040: 204f 4b0d 0a .OK..
21:10:09.519852 IP 192.168.0.88.51763 > 192.168.0.238.80: . ack 18 win 46
<nop,nop,timestamp 7887099 261105>
and they it sends a page which complains about file NOT being sent!
21:10:09.521032 IP 192.168.0.238.80 > 192.168.0.88.51763: P 18:747(729) ack
19454 win 212 <nop,nop,timestamp 261105 7887099>
0x0000: 4500 030d cfa3 4000 4006 e5b0 c0a8 00ee [EMAIL
PROTECTED]@.......
0x0010: c0a8 0058 0050 ca33 3144 35fa 9580 3a4f ...X.P.31D5...:O
0x0020: 8018 00d4 4646 0000 0101 080a 0003 fbf1 ....FF..........
0x0030: 0078 58fb 436f 6e74 656e 742d 7479 7065 .xX.Content-type
0x0040: 3a20 7465 7874 2f68 746d 6c0d 0a0d 0a3c :.text/html....<
0x0050: 4854 4d4c 3e3c 4845 4144 3e0a 3c54 4954 HTML><HEAD>.<TIT
0x0060: 4c45 3e63 6769 6320 7465 7374 3c2f 5449 LE>cgic.test</TI
0x0070: 544c 453e 3c2f 4845 4144 3e0a 3c42 4f44 TLE></HEAD>.<BOD
0x0080: 593e 3c48 313e 6367 6963 2074 6573 743c Y><H1>cgic.test<
0x0090: 2f48 313e 0a3c 6872 3e0a 3c21 2d2d 2032 /H1>.<hr>.<!--.2
0x00a0: 2e30 3a20 6d75 6c74 6970 6172 742f 666f .0:.multipart/fo
0x00b0: 726d 2d64 6174 6120 6973 2072 6571 7569 rm-data.is.requi
0x00c0: 7265 6420 666f 7220 6669 6c65 2075 706c red.for.file.upl
0x00d0: 6f61 6473 2e20 2d2d 3e3c 666f 726d 206d oads..--><form.m
0x00e0: 6574 686f 643d 2250 4f53 5422 2065 6e63 ethod="POST".enc
0x00f0: 7479 7065 3d22 6d75 6c74 6970 6172 742f type="multipart/
0x0100: 666f 726d 2d64 6174 6122 2009 6163 7469 form-data"..acti
0x0110: 6f6e 3d22 2f63 6769 2d62 696e 2f63 6769 on="/cgi-bin/cgi
0x0120: 6374 6573 742e 6367 6922 3e0a 3c70 3e46 ctest.cgi">.<p>F
0x0130: 696c 6520 5570 6c6f 6164 3a0a 3c69 6e70 ile.Upload:.<inp
0x0140: 7574 2074 7970 653d 2266 696c 6522 206e ut.type="file".n
0x0150: 616d 653d 2266 696c 6522 2076 616c 7565 ame="file".value
0x0160: 3d22 223e 2028 5365 6c65 6374 2041 204c ="">.(Select.A.L
0x0170: 6f63 616c 2046 696c 6529 0a3c 703e 0a3c ocal.File).<p>.<
0x0180: 696e 7075 7420 7479 7065 3d22 7375 626d input.type="subm
0x0190: 6974 2220 6e61 6d65 3d22 7465 7374 6367 it".name="testcg
0x01a0: 6963 2220 7661 6c75 653d 2253 7562 6d69 ic".value="Submi
0x01b0: 7420 5265 7175 6573 7422 3e0a 3c69 6e70 t.Request">.<inp
0x01c0: 7574 2074 7970 653d 2272 6573 6574 2220 ut.type="reset".
0x01d0: 7661 6c75 653d 2252 6573 6574 2052 6571 value="Reset.Req
0x01e0: 7565 7374 223e 0a3c 703e 5361 7665 2074 uest">.<p>Save.t
0x01f0: 6865 2043 4749 2045 6e76 6972 6f6e 6d65 he.CGI.Environme
0x0200: 6e74 3c70 3e0a 5072 6573 7369 6e67 2074 nt<p>.Pressing.t
0x0210: 6869 7320 6275 7474 6f6e 2077 696c 6c20 his.button.will.
0x0220: 7375 626d 6974 2074 6865 2066 6f72 6d2c submit.the.form,
0x0230: 2074 6865 6e20 7361 7665 2074 6865 2043 .then.save.the.C
0x0240: 4749 2065 6e76 6972 6f6e 6d65 6e74 2073 GI.environment.s
0x0250: 6f20 7468 6174 2069 7420 6361 6e20 6265 o.that.it.can.be
0x0260: 2072 6570 6c61 7965 6420 6c61 7465 7220 .replayed.later.
0x0270: 6279 2063 616c 6c69 6e67 2063 6769 5265 by.calling.cgiRe
0x0280: 6164 456e 7669 726f 6e6d 656e 7420 2869 adEnvironment.(i
0x0290: 6e20 6120 6465 6275 6767 6572 2c20 666f n.a.debugger,.fo
0x02a0: 7220 696e 7374 616e 6365 292e 3c70 3e0a r.instance).<p>.
0x02b0: 3c69 6e70 7574 2074 7970 653d 2273 7562 <input.type="sub
0x02c0: 6d69 7422 206e 616d 653d 2273 6176 6565 mit".name="savee
0x02d0: 6e76 6972 6f6e 6d65 6e74 2220 7661 6c75 nvironment".valu
0x02e0: 653d 2253 6176 6520 456e 7669 726f 6e6d e="Save.Environm
0x02f0: 656e 7422 3e0a 3c2f 666f 726d 3e0a 3c2f ent">.</form>.</
0x0300: 424f 4459 3e3c 2f48 544d 4c3e 0a BODY></HTML>.
21:10:09.521041 IP 192.168.0.88.51763 > 192.168.0.238.80: . ack 747 win 58
<nop,nop,timestamp 7887099 261105>
Then connection is closed normally:
21:10:09.521731 IP 192.168.0.238.80 > 192.168.0.88.51763: F 747:747(0) ack
19454 win 212 <nop,nop,timestamp 261105 7887099>
21:10:09.521833 IP 192.168.0.88.51763 > 192.168.0.238.80: F 19454:19454(0) ack
748 win 58 <nop,nop,timestamp 7887099 261105>
21:10:09.522298 IP 192.168.0.238.80 > 192.168.0.88.51763: . ack 19455 win 212
<nop,nop,timestamp 261105 7887099>
I can only conclude that server-side CGI script was unable
to properly parse uploaded file's data.
> Also can you please elaborate more on following. how can I use it and where
> ?
> "#!/bin/sh
> printf '\r\n'
> cat >/tmp/POSTDATA "
Put this into /cgi-bin/fwupgrade.cgi file (relative to httpd's top directory):
#!/bin/sh
printf '\r\n'
cat >/tmp/POSTDATA
make it executable, and use it as simplest CGI for saving unprocessed
POST uploads. For example, user can initiate uploads from this
simple page:
test_upload.htm
===============
<html><body>
<form action="/cgi-bin/fwupgrade.cgi" enctype="multipart/form-data"
method="post">
<p>Please specify a file:
<p><input type="file" name="datafile" size="40">
<p><input type="submit" value="Send">
</form>
--
vda
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