Re: portable socket wrappers

[Baurzhan Ismagulov <ibr radix50 net>]

On Wed, Jul 04, 2007 at 05:25:02PM +0200, katsanqat wrote:
> Hmm try this function. For example do a connect() to a server that
> does not exist and check the return value. if it is -1 then connect()
> did not succed. There you throw your super function below:
> 
> int ret = connect(sock, (struct sockaddr *)&ServAddr, sizeof(ServAddr));
> if (ret == -1) socket_error("connect");
> ...
> void socket_error(char *msg)
> {
>   #ifdef WIN32
>    LPVOID lpMsgBuf;
>    FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER |FORMAT_MESSAGE_FROM_SYSTEM |
>      FORMAT_MESSAGE_IGNORE_INSERTS, NULL,WSAGetLastError(), 0, (LPTSTR)&lpMsgBuf,
>      0, NULL);
>    char str[1024];
>    sprintf(str,"%s : %s", msg, (LPCTSTR)lpMsgBuf);
>    LocalFree(lpMsgBuf);
>    //MessageBox (NULL,str,"Socket Error",MB_OK | MB_ICONEXCLAMATION);
>    printf("%s\n",str);
>   #else
>    perror(msg);
>   #endif
> } 
> 
> There are other defines needed for example windows is using the type
> SOCKET whereas BSD Sockets use an int.
...

Thanks for the example! This is exactly the reason why I looked for a
library :) . It would cost me and future maintainers of the application
much more to develop that in-house than to learn a new API and regularly
update the library -- you learn and define the process only once.

With kind regards,
-- 
Baurzhan Ismagulov
http://www.kz-easy.com/