Date: Fri, 26 Mar 99 20:02:34 GMT From: Terry Glanfield <terry@program-products.co.uk> To: freebsd-stable@freebsd.org Subject: FIN not send on socket close() Message-ID: <9903262002.AA15201@program-products.co.uk>
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Hi,
I'm having trouble getting an FTP proxy working on 3.1-STABLE (~1 week
old). The proxy is a PASV aware version of the FTWK ftp-gw. When
trying to STOR a file through the proxy the receiving end hangs
waiting for a FIN packet that is never sent. The ktrace output below
shows the socket being closed. I've also included some short packet
traces - sorry about the line length - and dumps of a pftp session for
comparison.
The only difference I can see is that the proxy is being launched from
inetd. Any help would be greatly appreciated.
Cheers,
Terry.
Fristly the traces from the proxy version.
Receiver:
6952 ftpd CALL read(0x8,0xefbfcfbc,0x400)
6952 ftpd GIO fd 8 read 5 bytes
"test
"
6952 ftpd RET read 5
6952 ftpd CALL write(0x7,0xefbfcfbc,0x5)
6952 ftpd GIO fd 7 wrote 5 bytes
"test
"
6952 ftpd RET write 5
6952 ftpd CALL read(0x8,0xefbfcfbc,0x400)
>>read never returns...
Sender:
8543 ftp-gw CALL read(0x8,0xefbfce5c,0x800)
8543 ftp-gw GIO fd 8 read 5 bytes
"test
"
8543 ftp-gw RET read 5
8543 ftp-gw CALL write(0x7,0xefbfce5c,0x5)
8543 ftp-gw GIO fd 7 wrote 5 bytes
"test
"
8543 ftp-gw RET write 5
8543 ftp-gw CALL select(0x400,0xefbfdcb0,0,0,0xefbfdd30)
8543 ftp-gw RET select 1
8543 ftp-gw CALL read(0x8,0xefbfce5c,0x800)
8543 ftp-gw GIO fd 8 read 0 bytes
""
8543 ftp-gw RET read 0
8543 ftp-gw CALL close(0x8)
8543 ftp-gw RET close 0
8543 ftp-gw CALL close(0x7)
8543 ftp-gw RET close 0
>>... but the socket is closed
Here are the traces from the pftp version.
Receiver:
6966 ftpd CALL read(0x8,0xefbfcfbc,0x400)
6966 ftpd GIO fd 8 read 5 bytes
"test
"
6966 ftpd RET read 5
6966 ftpd CALL write(0x7,0xefbfcfbc,0x5)
6966 ftpd GIO fd 7 wrote 5 bytes
"test
"
6966 ftpd RET write 5
6966 ftpd CALL read(0x8,0xefbfcfbc,0x400)
6966 ftpd GIO fd 8 read 0 bytes
""
6966 ftpd RET read 0
>>read returns cleanly...
6966 ftpd CALL write(0x1,0x8059000,0x18)
6966 ftpd GIO fd 1 wrote 24 bytes
"226 Transfer complete.\r
"
Sender:
8595 pftp CALL read(0x4,0xefbfd3e4,0x400)
8595 pftp GIO fd 4 read 5 bytes
"test
"
8595 pftp RET read 5
8595 pftp CALL write(0x5,0xefbfd3e4,0x5)
8595 pftp GIO fd 5 wrote 5 bytes
"test
"
8595 pftp RET write 5
8595 pftp CALL read(0x4,0xefbfd3e4,0x400)
8595 pftp GIO fd 4 read 0 bytes
""
8595 pftp RET read 0
8595 pftp CALL gettimeofday(0xefbfd290,0)
8595 pftp RET gettimeofday 0
8595 pftp CALL write(0x1,0xefbfd298,0x1c)
8595 pftp GIO fd 1 wrote 28 bytes
"\r100% 5 00:00 ETA"
8595 pftp RET write 28/0x1c
8595 pftp CALL setitimer(0,0xefbfd234,0)
8595 pftp RET setitimer 0
8595 pftp CALL write(0x1,0x8069000,0x1)
8595 pftp GIO fd 1 wrote 1 byte
"
"
8595 pftp RET write 1
8595 pftp CALL close(0x4)
8595 pftp RET close 0
8595 pftp CALL close(0x5)
8595 pftp RET close 0
8595 pftp CALL sigaction(0x2,0xefbfcf50,0xefbfcf44)
8595 pftp RET sigaction 0
8595 pftp CALL read(0x3,0x8079000,0x4356)
8595 pftp GIO fd 3 read 24 bytes
"226 Transfer complete.\r
"
Finally the packet traces.
Proxy version:
19:29:48.050523 212.240.242.226.2990 > 10.3.1.251.21: P 1748251412:1748251418(6) ack 1627790365 win 17238 (DF)
19:29:48.054606 10.3.1.251.21 > 212.240.242.226.2990: P 1:47(46) ack 6 win 17238 (DF) [tos 0x10]
19:29:48.055582 212.240.242.226.2992 > 10.3.1.251.49157: S 1754860719:1754860719(0) win 16384 <mss 1326> (DF)
19:29:48.056321 10.3.1.251.49157 > 212.240.242.226.2992: S 1634641441:1634641441(0) ack 1754860720 win 17238 <mss 1326> (DF)
19:29:48.056656 212.240.242.226.2992 > 10.3.1.251.49157: . ack 1 win 17238 (DF)
19:29:48.066298 212.240.242.226.2990 > 10.3.1.251.21: P 6:14(8) ack 47 win 17238 (DF)
19:29:48.072126 10.3.1.251.21 > 212.240.242.226.2990: P 47:97(50) ack 14 win 17238 (DF) [tos 0x10]
19:29:48.075895 212.240.242.226.2992 > 10.3.1.251.49157: P 1:6(5) ack 1 win 17238 (DF)
19:29:48.116205 212.240.242.226.2990 > 10.3.1.251.21: . ack 97 win 17238 (DF)
19:29:48.275329 10.3.1.251.49157 > 212.240.242.226.2992: . ack 6 win 17238 (DF) [tos 0x8]
pftp version:
19:35:11.579785 212.240.242.226.2998 > 10.3.1.251.21: P 1809781922:1809781928(6) ack 1688388446 win 17238 (DF) [tos 0x10]
19:35:11.584555 10.3.1.251.21 > 212.240.242.226.2998: P 1:47(46) ack 6 win 17238 (DF) [tos 0x10]
19:35:11.587443 212.240.242.226.2999 > 10.3.1.251.49158: S 1817760134:1817760134(0) win 16384 <mss 1326> (DF)
19:35:11.588171 10.3.1.251.49158 > 212.240.242.226.2999: S 1696091157:1696091157(0) ack 1817760135 win 17238 <mss 1326> (DF)
19:35:11.588500 212.240.242.226.2999 > 10.3.1.251.49158: . ack 1 win 17238 (DF)
19:35:11.589643 212.240.242.226.2998 > 10.3.1.251.21: P 6:14(8) ack 47 win 17238 (DF) [tos 0x10]
19:35:11.593372 10.3.1.251.21 > 212.240.242.226.2998: P 47:97(50) ack 14 win 17238 (DF) [tos 0x10]
19:35:11.597962 212.240.242.226.2999 > 10.3.1.251.49158: P 1:6(5) ack 1 win 17238 (DF) [tos 0x8]
19:35:11.601319 212.240.242.226.2999 > 10.3.1.251.49158: F 6:6(0) ack 1 win 17238 (DF) [tos 0x8]
19:35:11.601936 10.3.1.251.49158 > 212.240.242.226.2999: . ack 7 win 17238 (DF) [tos 0x8]
19:35:11.602827 10.3.1.251.21 > 212.240.242.226.2998: P 97:121(24) ack 14 win 17238 (DF) [tos 0x10]
19:35:11.603530 10.3.1.251.49158 > 212.240.242.226.2999: F 1:1(0) ack 7 win 17238 (DF) [tos 0x8]
19:35:11.603833 212.240.242.226.2999 > 10.3.1.251.49158: . ack 2 win 17238 (DF) [tos 0x8]
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