/**
** Open an UDP Socket port.
**
** @param port !=0 Port to bind in host notation.
**
** @return If success the socket fildes, -1 otherwise.
*/
Socket NetOpenUDP(int port)
{
Socket sockfd;
// open the socket
sockfd = socket(AF_INET, SOCK_DGRAM, 0);
if (sockfd == INVALID_SOCKET) {
return (Socket)-1;
}
// bind local port
if (port) {
struct sockaddr_in sock_addr;
memset(&sock_addr, 0, sizeof(sock_addr));
sock_addr.sin_family = AF_INET;
sock_addr.sin_addr.s_addr = INADDR_ANY;
sock_addr.sin_port = htons(port);
// Bind the socket for listening
if (bind(sockfd, (struct sockaddr *)&sock_addr, sizeof(sock_addr)) < 0) {
fprintf(stderr, "Couldn't bind to local port\n");
NetCloseUDP(sockfd);
return (Socket)-1;
}
NetLastHost = sock_addr.sin_addr.s_addr;
NetLastPort = sock_addr.sin_port;
}
return sockfd;
}
/**
** Open an UDP Socket port.
**
** @param ip !=0 Ip to bind in host notation.
** @param port !=0 Port to bind in host notation.
**
** @return If success the socket fildes, -1 otherwise.
*/
Socket NetOpenUDP(unsigned long ip, int port)
{
// open the socket
Socket sockfd = socket(AF_INET, SOCK_DGRAM, 0);
if (sockfd == INVALID_SOCKET) {
return static_cast<Socket>(-1);
}
// bind local port
if (port) {
struct sockaddr_in sock_addr;
memset(&sock_addr, 0, sizeof(sock_addr));
sock_addr.sin_family = AF_INET;
sock_addr.sin_addr.s_addr = ip;
sock_addr.sin_port = port;
// Bind the socket for listening
if (bind(sockfd, (struct sockaddr *)&sock_addr, sizeof(sock_addr)) < 0) {
fprintf(stderr, "Couldn't bind to local port\n");
NetCloseUDP(sockfd);
return static_cast<Socket>(-1);
}
}
return sockfd;
}
void Close() {
NetCloseUDP(socket);
socket = Socket(-1);
}
