Subject: Problem with only one user uploading

From: Haohui Wang <[email-masked]>
Date: Wed, 02 Oct 1996 18:03:39 -0400

We have a user here need to upload html files frequently.  She is
on the other side of the Net.  Very often, her upload would be half
way complete, and she receives an error message about "non-blocking
call" on her Win95 ftp client.  And the uploaded file only has the 
partial content.  I am pretty sure this is not a WuFTPD probelm, since
no other user is having this problem upload across the Net to us.  Did
anyone see something like this?

The version of wuftpd:
Connected to mail01.ljextra.com.
220 mail01.ljextra.com FTP server (Version wu-2.4.2-academ[BETA-11](6)
Tue May 7 09:35:01 EDT 1996) ready.

Here is a tcpdump:

12:30:46.218063 148.170.4.2.4778 > mail01.ljextra.com.ftp: S
8040651:8040651(0) 
win 8192 <mss 1460> (DF)
12:30:46.218970 mail01.ljextra.com.ftp > 148.170.4.2.4778: S
1838057358:18380573
58(0) ack 8040652 win 8760 <mss 1460> (DF)
12:30:46.266433 148.170.4.2.4778 > mail01.ljextra.com.ftp: . ack 1 win
8760 (DF)
12:30:46.546641 mail01.ljextra.com.ftp > 148.170.4.2.4778: P 1:109(108)
ack 1 wi
n 8760 (DF) [tos 0x10]
12:30:46.615610 148.170.4.2.4778 > mail01.ljextra.com.ftp: P 1:14(13)
ack 109 wi
n 8652 (DF)
12:30:46.658001 mail01.ljextra.com.ftp > 148.170.4.2.4778: . ack 14 win
8760 (DF
) [tos 0x10]
12:30:46.685611 mail01.ljextra.com.ftp > 148.170.4.2.4778: P 109:144(35)
ack 14 
win 8760 (DF) [tos 0x10]
12:30:46.735499 148.170.4.2.4778 > mail01.ljextra.com.ftp: P 14:28(14)
ack 144 w
in 8617 (DF)
12:30:46.777966 mail01.ljextra.com.ftp > 148.170.4.2.4778: . ack 28 win
8760 (DF
) [tos 0x10]
12:30:47.054595 mail01.ljextra.com.ftp > 148.170.4.2.4778: P 144:172(28)
ack 28 
win 8760 (DF) [tos 0x10]
12:30:47.102692 148.170.4.2.4778 > mail01.ljextra.com.ftp: P 28:70(42)
ack 172 w
in 8589 (DF)
12:30:47.147942 mail01.ljextra.com.ftp > 148.170.4.2.4778: . ack 70 win
8760 (DF
) [tos 0x10]
12:30:47.233587 mail01.ljextra.com.ftp > 148.170.4.2.4778: P 172:201(29)
ack 70 
win 8760 (DF) [tos 0x10]
12:30:47.290301 148.170.4.2.4778 > mail01.ljextra.com.ftp: P 70:75(5)
ack 201 wi
n 8560 (DF)
12:30:47.295075 mail01.ljextra.com.ftp > 148.170.4.2.4778: P 201:263(62)
ack 75 
win 8760 (DF) [tos 0x10]
12:30:47.348456 148.170.4.2.4778 > mail01.ljextra.com.ftp: P 75:81(6)
ack 263 wi
n 8498 (DF)
12:30:47.351502 mail01.ljextra.com.ftp > 148.170.4.2.4778: P 263:330(67)
ack 81 
win 8760 (DF) [tos 0x10]
12:30:47.518670 148.170.4.2.4778 > mail01.ljextra.com.ftp: . ack 330 win
8431 (D
F)
12:30:47.519075 mail01.ljextra.com.ftp > 148.170.4.2.4778: P
330:756(426) ack 81
 win 8760 (DF) [tos 0x10]
12:30:47.722280 148.170.4.2.4778 > mail01.ljextra.com.ftp: . ack 756 win
8005 (D
F)
12:30:47.822071 148.170.4.2.4778 > mail01.ljextra.com.ftp: P 81:106(25)
ack 756 
win 8005 (DF)
12:30:47.827281 mail01.ljextra.com.ftp > 148.170.4.2.4778: P 756:786(30)
ack 106
 win 8760 (DF) [tos 0x10]
12:30:47.871877 148.170.4.2.4778 > mail01.ljextra.com.ftp: P 106:112(6)
ack 786 
win 7975 (DF)
12:30:47.918112 mail01.ljextra.com.ftp > 148.170.4.2.4778: . ack 112 win
8760 (D
F) [tos 0x10]
12:30:47.940354 mail01.ljextra.com.ftp > 148.170.4.2.4778: P 786:839(53)
ack 112
 win 8760 (DF) [tos 0x10]
12:30:48.118138 148.170.4.2.4778 > mail01.ljextra.com.ftp: . ack 839 win
7922 (D
F)
12:30:52.727957 mail01.ljextra.com.ftp > 148.170.4.2.4778: P 839:863(24)
ack 112
 win 8760 (DF) [tos 0x10]
12:30:53.007016 148.170.4.2.4778 > mail01.ljextra.com.ftp: . ack 863 win
7898 (D
F)
12:45:52.711840 mail01.ljextra.com.ftp > 148.170.4.2.4778: P 863:919(56)
ack 112
 win 8760 (DF) [tos 0x10]
12:45:52.724914 mail01.ljextra.com.ftp > 148.170.4.2.4778: F 919:919(0)
ack 112 
win 8760 (DF) [tos 0x10]
12:45:52.817901 148.170.4.2.4778 > mail01.ljextra.com.ftp: . ack 920 win
7842 (D
F)
12:45:53.102716 148.170.4.2.4778 > mail01.ljextra.com.ftp: R
8040763:8040763(0) 
win 0 (DF)
12:50:34.339828 mail01.ljextra.com.ftp > 148.170.4.2.3314: P
1963:1987(24) ack 3
62 win 8760 (DF) [tos 0x10]
12:50:34.529514 148.170.4.2.3314 > mail01.ljextra.com.ftp: F 362:362(0)
ack 1987
 win 8257 (DF)
12:50:34.529801 mail01.ljextra.com.ftp > 148.170.4.2.3314: . ack 363 win
8760 (D
F) [tos 0x10]
12:50:34.545547 mail01.ljextra.com.ftp > 148.170.4.2.3314: P
1987:2024(37) ack 3
63 win 8760 (DF) [tos 0x10]
12:50:34.565582 mail01.ljextra.com.ftp > 148.170.4.2.3314: F
2024:2024(0) ack 36
3 win 8760 (DF) [tos 0x10]
12:50:34.587800 148.170.4.2.3314 > mail01.ljextra.com.ftp: R
7559121:7559121(0) 
win 0 (DF)
12:50:34.634638 148.170.4.2.3314 > mail01.ljextra.com.ftp: R
7559121:7559121(0) 
win 0

-- 
Haohui Wang
Law Journal EXTRA!                               http://www.ljextra.com
[email-masked]                                    [email-masked]
          UNIX, the hackers' pornography -- Donald A. Norman