Is there a way for retrieving my own IP address using standard sockets (ie: no Microsoft specific implementations)? I need to know this for responding to clients discovering servers on a LAN. TY

#include <arpa/inet.h>#include <netdb.h>#include <stdio.h>#include <unistd.h>int main( int argc, char **argv ){        char hn[256], *ip;        struct hostent *he;        gethostname( hn, 256 );        he = gethostbyname( hn );        ip = inet_ntoa( *(struct in_addr *)*he->h_addr_list );        printf( "%s\n", ip );        return 0;}

That looks like it would work... were it not that one of the platforms I''m writing for has no DNS functionality. Thus gethostbyname() is not available nor any other name resolving functions

getsockname man page.

getsockname from MSDN.

Anyway, the client should get the server address using getpeername() or by calling recvfrom(); that way, NAT will work.

Also, getsockname() is broken for UDP on Windows:

kb article on how broken it is.



[edited by - hplus0603 on May 5, 2004 2:47:57 AM]