code fragment for getting info of a dynamically bound port #c #socket

port_info.c

// code fragment for getting info of a dynamically bound port
struct sockaddr_in	s_in;
int len = sizeof(s_in);
s_in.sin_family	  = AF_INET;
s_in.sin_addr.s_addr = INADDR_ANY;
s_in.sin_port		= htons(0);
//SOCKET s = socket(AF_INET, SOCK_STREAM, 0); // TCP
SOCKET s = socket(AF_INET, SOCK_DGRAM, 0); // UDP
bind(s, (SOCKADDR*) &s_in, sizeof(s_in));
getsockname(s, (SOCKADDR*) &s_in, &len);
{
	char tmp[200];
	printf(tmp, "%d", ntohs(s_in.sin_port));
}