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Mail Archives: djgpp/2001/01/21/20:36:29

Message-ID: <3A6B8C5B.7030504@operamail.com>
From: Sahab Yazdani <sahaby AT operamail DOT com>
Organization: PheonixSoft Interactive
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Newsgroups: comp.os.msdos.djgpp
Subject: Re: libsocket over the net...
References: <3A69FEFF DOT 7020104 AT operamail DOT com> <3A6A28C3 DOT 502361A2 AT phekda DOT freeserve DOT co DOT uk> <3A6A6E2B DOT 7000204 AT operamail DOT com> <3A6AFFBA DOT 5DB1B739 AT phekda DOT freeserve DOT co DOT uk>
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Date: Sun, 21 Jan 2001 20:26:51 -0500
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This is a multi-part message in MIME format.
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Richard Dawe wrote:

> Hello.
> 
> 
> 
> Sahab Yazdani wrote:
> 
[snip]

> 
> 
> What did you change? Why is the data no longer garbled? Knowing this could
> 
> help fix your other problems.

I decreased the size of the MassacreHeader packet by 6 bytes by 
decreasing the size of the "header" value to 4 bytes instead of 10, this 
seems to fix it, cuz it only needs 1 pass to read the data no matter what.

> 
> 
> 
> 
[snip]

> What type of sockets are you creating - TCP/IP or UDP/IP? E.g. are you
> 
> using:
> 
> 
> 
> - socket(AF_INET, SOCK_STREAM, IPPROTO_TCP) for TCP/IP;
I am using this one.

> 
> - or socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP) for UDP/IP?
> 
> 
> 
> (Actually, you should use PF_INET instead of AF_INET.)
> 
> 
> 
> You should be able to send your headers in one packet, since they are
> 
> small.
> 
> 
> 
> 
>> as a side note, when I print out the error using either lsck_perror or
> 
>> perror, i get this message "RETRIEVE1: Resource temporarily not
> 
>> available (EAGAIN)" over and over again with a stray "RETREIVE2: " " " "
> 
>> popping in there sometimes (only when data is being sent over the
> 
>> network).
> 
> 
> 
> Which version of Windows are you using? Do you have Winsock 2 installed?
I am using Windows 98 with WinSock 2 installed (obviously).

> 
> What does the libsocket demo program demo/diag.exe display? You can
> 
> capture its output like so:
> 
> 
> 
>     redir -eo diag.exe > diag.out
included as attachment

> 
> 
> 
> I've never seen this error, but other people have reported it. Perhaps it
> 
> only occurs with a small packet size? Strange. I would like to know why
> 
> that happens.
> 
> 
> 
> [snip]
> 
> 
>> MassacreHeader CreateHeader( unsigned char packetType, unsigned char multiples ) {
> 
>>         MassacreHeader retType;
> 
>> 
> 
>>         strcpy(retType.header, "MASS" );
> 
> 
> 
> Since retType.Header is a 4 char array, this will overflow the buffer and
> 
> overwrite retType.packetType, because "MASS" is 5 bytes - 'MASS\0'. If you
> 
> want space for the nul terminator, make header a 5 char array.

changed it...

thank you.

> 
> 
> 
> I still can't see anything wrong with the rest of your code.
> 
> 
> 
> Bye, 



-- 
***********************************************************
* Sahab Yazdani * "Wizard's Third Rule: Passion rules     *
* Thornhill S.S * Reason." - Kolo's Journal               *
***********************************************************
* http://pheonixsoft.virtualave.net/                      *
***********************************************************

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perror(): Address family not supported (EAFNOSUPPORT)
libsocket Diagnostic Program

Copyright (C) 1997, 1998 by Indrek Mandre, 1997-2000 by Richard Dawe
libsocket version 0.8.0

Host name: 'matrix'
Domain name: ''
Configuration directory: 'e:/djgpp/contrib/ls080'

DNS servers: None found

Interface Coda SOCK.VXD
	Address 127.0.0.1 netmask 255.0.0.0 
	---
	Address 0.0.0.0 netmask 0.0.0.0 
	---
	Address 192.168.1.1 netmask 255.255.255.0 gateway 192.168.1.1 
	---

Interface Unix->mailslot

Testing Internet domain (AF_INET) sockets...
+ SUPPORTED: stream type socket with default (0) protocol
. Unsupported: stream type socket with ICMP protocol
+ SUPPORTED: stream type socket with TCP protocol
. Unsupported: stream type socket with UDP protocol
. Unsupported: stream type socket with raw protocol
+ SUPPORTED: datagram type socket with default (0) protocol
. Unsupported: datagram type socket with ICMP protocol
. Unsupported: datagram type socket with TCP protocol
+ SUPPORTED: datagram type socket with UDP protocol
. Unsupported: datagram type socket with raw protocol
. Unsupported: raw type socket with default (0) protocol
. Unsupported: raw type socket with ICMP protocol
. Unsupported: raw type socket with TCP protocol
. Unsupported: raw type socket with UDP protocol
. Unsupported: raw type socket with raw protocol
. Unsupported: sequential type socket with default (0) protocol
. Unsupported: sequential type socket with ICMP protocol
. Unsupported: sequential type socket with TCP protocol
. Unsupported: sequential type socket with UDP protocol
. Unsupported: sequential type socket with raw protocol

Testing Unix domain (AF_UNIX) sockets...
+ SUPPORTED: stream type socket with default (0) protocol
. Unsupported: stream type socket with ICMP protocol
. Unsupported: stream type socket with TCP protocol
. Unsupported: stream type socket with UDP protocol
. Unsupported: stream type socket with raw protocol
+ SUPPORTED: datagram type socket with default (0) protocol
. Unsupported: datagram type socket with ICMP protocol
. Unsupported: datagram type socket with TCP protocol
. Unsupported: datagram type socket with UDP protocol
. Unsupported: datagram type socket with raw protocol
. Unsupported: raw type socket with default (0) protocol
. Unsupported: raw type socket with ICMP protocol
. Unsupported: raw type socket with TCP protocol
. Unsupported: raw type socket with UDP protocol
. Unsupported: raw type socket with raw protocol
. Unsupported: sequential type socket with default (0) protocol
. Unsupported: sequential type socket with ICMP protocol
. Unsupported: sequential type socket with TCP protocol
. Unsupported: sequential type socket with UDP protocol
. Unsupported: sequential type socket with raw protocol

These should be meaningful error messages:
strerror(): Address family not supported (EAFNOSUPPORT)

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