Home » Archimedes archive » Acorn User » AU 1995-05.adf » !Internet_StarterPak » !TCPIP/TCPIP_Doc/History/New_203

!TCPIP/TCPIP_Doc/History/New_203

This website contains an archive of files for the Acorn Electron, BBC Micro, Acorn Archimedes, Commodore 16 and Commodore 64 computers, which Dominic Ford has rescued from his private collection of floppy disks and cassettes.

Some of these files were originally commercial releases in the 1980s and 1990s, but they are now widely available online. I assume that copyright over them is no longer being asserted. If you own the copyright and would like files to be removed, please contact me.

Tape/disk: Home » Archimedes archive » Acorn User » AU 1995-05.adf » !Internet_StarterPak
Filename: !TCPIP/TCPIP_Doc/History/New_203
Read OK:
File size: 0531 bytes
Load address: 0000
Exec address: 0000
File contents
TCPIP (Arc KA9Q) Version 2.03 (21-Feb-1995)
===========================================

See "New_202" for details of changes since v2.01.

Fixes
=====

NNTP History
~~~~~~~~~~~~
Problems: NNTP sometimes lost its history.
          Confusion could arise from running multiple feeds
          simultaneously.
NNTP History safety net against system failures should mean that ID
history is never lost.

Dropped the global ID history and gone back to separate history files,
but of course keeping new history code and new file format.


CSLIP
~~~~~
Problem: Excessive checksum errors with TCP compress.

There was an odd problem that sometimes resulting in excessive
re-transmitions and corruption of TCP ACK numbers, and so checksum
errors. This seems to have fixed itself since converting BSD CSLIP
code to ANSI-C. (Compiler problem?)

Main symtom of this was very slow outgoing mail, FTP uploads etc.


SMTP
~~~~
Problem: Alias expansion was also filtering valid file names.

Revised user name filter to allow dot separated user names to be written
if directory exists to accomodate the file. Also preserves as many
characters as possible from multi-part names.


             ------------------------------------------

Please address bug reports etc to tcpip2@comptech.demon.co.uk.

Adam Goodfellow <adam@comptech.demon.co.uk>

00000000  54 43 50 49 50 20 28 41  72 63 20 4b 41 39 51 29  |TCPIP (Arc KA9Q)|
00000010  20 56 65 72 73 69 6f 6e  20 32 2e 30 33 20 28 32  | Version 2.03 (2|
00000020  31 2d 46 65 62 2d 31 39  39 35 29 0a 3d 3d 3d 3d  |1-Feb-1995).====|
00000030  3d 3d 3d 3d 3d 3d 3d 3d  3d 3d 3d 3d 3d 3d 3d 3d  |================|
*
00000050  3d 3d 3d 3d 3d 3d 3d 0a  0a 53 65 65 20 22 4e 65  |=======..See "Ne|
00000060  77 5f 32 30 32 22 20 66  6f 72 20 64 65 74 61 69  |w_202" for detai|
00000070  6c 73 20 6f 66 20 63 68  61 6e 67 65 73 20 73 69  |ls of changes si|
00000080  6e 63 65 20 76 32 2e 30  31 2e 0a 0a 46 69 78 65  |nce v2.01...Fixe|
00000090  73 0a 3d 3d 3d 3d 3d 0a  0a 4e 4e 54 50 20 48 69  |s.=====..NNTP Hi|
000000a0  73 74 6f 72 79 0a 7e 7e  7e 7e 7e 7e 7e 7e 7e 7e  |story.~~~~~~~~~~|
000000b0  7e 7e 0a 50 72 6f 62 6c  65 6d 73 3a 20 4e 4e 54  |~~.Problems: NNT|
000000c0  50 20 73 6f 6d 65 74 69  6d 65 73 20 6c 6f 73 74  |P sometimes lost|
000000d0  20 69 74 73 20 68 69 73  74 6f 72 79 2e 0a 20 20  | its history..  |
000000e0  20 20 20 20 20 20 20 20  43 6f 6e 66 75 73 69 6f  |        Confusio|
000000f0  6e 20 63 6f 75 6c 64 20  61 72 69 73 65 20 66 72  |n could arise fr|
00000100  6f 6d 20 72 75 6e 6e 69  6e 67 20 6d 75 6c 74 69  |om running multi|
00000110  70 6c 65 20 66 65 65 64  73 0a 20 20 20 20 20 20  |ple feeds.      |
00000120  20 20 20 20 73 69 6d 75  6c 74 61 6e 65 6f 75 73  |    simultaneous|
00000130  6c 79 2e 0a 4e 4e 54 50  20 48 69 73 74 6f 72 79  |ly..NNTP History|
00000140  20 73 61 66 65 74 79 20  6e 65 74 20 61 67 61 69  | safety net agai|
00000150  6e 73 74 20 73 79 73 74  65 6d 20 66 61 69 6c 75  |nst system failu|
00000160  72 65 73 20 73 68 6f 75  6c 64 20 6d 65 61 6e 20  |res should mean |
00000170  74 68 61 74 20 49 44 0a  68 69 73 74 6f 72 79 20  |that ID.history |
00000180  69 73 20 6e 65 76 65 72  20 6c 6f 73 74 2e 0a 0a  |is never lost...|
00000190  44 72 6f 70 70 65 64 20  74 68 65 20 67 6c 6f 62  |Dropped the glob|
000001a0  61 6c 20 49 44 20 68 69  73 74 6f 72 79 20 61 6e  |al ID history an|
000001b0  64 20 67 6f 6e 65 20 62  61 63 6b 20 74 6f 20 73  |d gone back to s|
000001c0  65 70 61 72 61 74 65 20  68 69 73 74 6f 72 79 20  |eparate history |
000001d0  66 69 6c 65 73 2c 0a 62  75 74 20 6f 66 20 63 6f  |files,.but of co|
000001e0  75 72 73 65 20 6b 65 65  70 69 6e 67 20 6e 65 77  |urse keeping new|
000001f0  20 68 69 73 74 6f 72 79  20 63 6f 64 65 20 61 6e  | history code an|
00000200  64 20 6e 65 77 20 66 69  6c 65 20 66 6f 72 6d 61  |d new file forma|
00000210  74 2e 0a 0a 0a 43 53 4c  49 50 0a 7e 7e 7e 7e 7e  |t....CSLIP.~~~~~|
00000220  0a 50 72 6f 62 6c 65 6d  3a 20 45 78 63 65 73 73  |.Problem: Excess|
00000230  69 76 65 20 63 68 65 63  6b 73 75 6d 20 65 72 72  |ive checksum err|
00000240  6f 72 73 20 77 69 74 68  20 54 43 50 20 63 6f 6d  |ors with TCP com|
00000250  70 72 65 73 73 2e 0a 0a  54 68 65 72 65 20 77 61  |press...There wa|
00000260  73 20 61 6e 20 6f 64 64  20 70 72 6f 62 6c 65 6d  |s an odd problem|
00000270  20 74 68 61 74 20 73 6f  6d 65 74 69 6d 65 73 20  | that sometimes |
00000280  72 65 73 75 6c 74 69 6e  67 20 69 6e 20 65 78 63  |resulting in exc|
00000290  65 73 73 69 76 65 0a 72  65 2d 74 72 61 6e 73 6d  |essive.re-transm|
000002a0  69 74 69 6f 6e 73 20 61  6e 64 20 63 6f 72 72 75  |itions and corru|
000002b0  70 74 69 6f 6e 20 6f 66  20 54 43 50 20 41 43 4b  |ption of TCP ACK|
000002c0  20 6e 75 6d 62 65 72 73  2c 20 61 6e 64 20 73 6f  | numbers, and so|
000002d0  20 63 68 65 63 6b 73 75  6d 0a 65 72 72 6f 72 73  | checksum.errors|
000002e0  2e 20 54 68 69 73 20 73  65 65 6d 73 20 74 6f 20  |. This seems to |
000002f0  68 61 76 65 20 66 69 78  65 64 20 69 74 73 65 6c  |have fixed itsel|
00000300  66 20 73 69 6e 63 65 20  63 6f 6e 76 65 72 74 69  |f since converti|
00000310  6e 67 20 42 53 44 20 43  53 4c 49 50 0a 63 6f 64  |ng BSD CSLIP.cod|
00000320  65 20 74 6f 20 41 4e 53  49 2d 43 2e 20 28 43 6f  |e to ANSI-C. (Co|
00000330  6d 70 69 6c 65 72 20 70  72 6f 62 6c 65 6d 3f 29  |mpiler problem?)|
00000340  0a 0a 4d 61 69 6e 20 73  79 6d 74 6f 6d 20 6f 66  |..Main symtom of|
00000350  20 74 68 69 73 20 77 61  73 20 76 65 72 79 20 73  | this was very s|
00000360  6c 6f 77 20 6f 75 74 67  6f 69 6e 67 20 6d 61 69  |low outgoing mai|
00000370  6c 2c 20 46 54 50 20 75  70 6c 6f 61 64 73 20 65  |l, FTP uploads e|
00000380  74 63 2e 0a 0a 0a 53 4d  54 50 0a 7e 7e 7e 7e 0a  |tc....SMTP.~~~~.|
00000390  50 72 6f 62 6c 65 6d 3a  20 41 6c 69 61 73 20 65  |Problem: Alias e|
000003a0  78 70 61 6e 73 69 6f 6e  20 77 61 73 20 61 6c 73  |xpansion was als|
000003b0  6f 20 66 69 6c 74 65 72  69 6e 67 20 76 61 6c 69  |o filtering vali|
000003c0  64 20 66 69 6c 65 20 6e  61 6d 65 73 2e 0a 0a 52  |d file names...R|
000003d0  65 76 69 73 65 64 20 75  73 65 72 20 6e 61 6d 65  |evised user name|
000003e0  20 66 69 6c 74 65 72 20  74 6f 20 61 6c 6c 6f 77  | filter to allow|
000003f0  20 64 6f 74 20 73 65 70  61 72 61 74 65 64 20 75  | dot separated u|
00000400  73 65 72 20 6e 61 6d 65  73 20 74 6f 20 62 65 20  |ser names to be |
00000410  77 72 69 74 74 65 6e 0a  69 66 20 64 69 72 65 63  |written.if direc|
00000420  74 6f 72 79 20 65 78 69  73 74 73 20 74 6f 20 61  |tory exists to a|
00000430  63 63 6f 6d 6f 64 61 74  65 20 74 68 65 20 66 69  |ccomodate the fi|
00000440  6c 65 2e 20 41 6c 73 6f  20 70 72 65 73 65 72 76  |le. Also preserv|
00000450  65 73 20 61 73 20 6d 61  6e 79 0a 63 68 61 72 61  |es as many.chara|
00000460  63 74 65 72 73 20 61 73  20 70 6f 73 73 69 62 6c  |cters as possibl|
00000470  65 20 66 72 6f 6d 20 6d  75 6c 74 69 2d 70 61 72  |e from multi-par|
00000480  74 20 6e 61 6d 65 73 2e  0a 0a 0a 20 20 20 20 20  |t names....     |
00000490  20 20 20 20 20 20 20 20  2d 2d 2d 2d 2d 2d 2d 2d  |        --------|
000004a0  2d 2d 2d 2d 2d 2d 2d 2d  2d 2d 2d 2d 2d 2d 2d 2d  |----------------|
*
000004c0  2d 2d 0a 0a 50 6c 65 61  73 65 20 61 64 64 72 65  |--..Please addre|
000004d0  73 73 20 62 75 67 20 72  65 70 6f 72 74 73 20 65  |ss bug reports e|
000004e0  74 63 20 74 6f 20 74 63  70 69 70 32 40 63 6f 6d  |tc to tcpip2@com|
000004f0  70 74 65 63 68 2e 64 65  6d 6f 6e 2e 63 6f 2e 75  |ptech.demon.co.u|
00000500  6b 2e 0a 0a 41 64 61 6d  20 47 6f 6f 64 66 65 6c  |k...Adam Goodfel|
00000510  6c 6f 77 20 3c 61 64 61  6d 40 63 6f 6d 70 74 65  |low <adam@compte|
00000520  63 68 2e 64 65 6d 6f 6e  2e 63 6f 2e 75 6b 3e 0a  |ch.demon.co.uk>.|
00000530  0a                                                |.|
00000531