struct sockaddr_in server_address;

socklen_t address_length = sizeof(server_address);

server_address.sin_family = AF_INET;

#ifdef _WIN32

inet_pton(server_address.sin_family, host, (void *)&server_address.sin_addr);

#else

server_address.sin_addr.s_addr = inet_addr(host);

#endif // _WIN32

// Find available port.

int port = 1111;

server_address.sin_port = htons(port);

// If the port is available the bind() will return 0.

int bind_result = bind(socket, (sockaddr *)&server_address, address_length);

while (bind_result != 0) {

++port;

server_address.sin_port = htons(port);

bind_result = bind(socket, (sockaddr *)&server_address, address_length);

}

return server_address;