Function nw_InitSockets

networking/networking.cpp:735–799

Inits the sockets that the application will be using

// Inits the sockets that the application will be using
void nw_InitSockets(uint16_t port) {

  nw_ListenPort = port;
  // UDP/TCP socket structure
  SOCKADDR_IN sock_addr;

  // Now do tcp!
  TCP_active = 0;
  TCP_socket = INVALID_SOCKET;
  // TCP_reliable_socket = INVALID_SOCKET;
  TCP_listen_socket = INVALID_SOCKET;

  // Initialize the UDP socket
  TCP_socket = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);

  // Initialize all reliable sockets, IPX and TCP
  nw_InitReliableSocket();

  if (TCP_socket != INVALID_SOCKET) {
    // bind the socket
    memset(&sock_addr, 0, sizeof(SOCKADDR_IN));
    sock_addr.sin_family = AF_INET;

    uint32_t my_ip;

    my_ip = nw_GetThisIP();

    memcpy(&sock_addr.sin_addr.s_addr, &my_ip, sizeof(uint32_t));

    sock_addr.sin_port = htons(port);
    if (bind(TCP_socket, (SOCKADDR *)&sock_addr, sizeof(sock_addr)) == SOCKET_ERROR) {
      mprintf(0, "Couldn't bind TCP socket (%d)! Invalidating TCP\n", WSAGetLastError());
      goto tcp_done;
    }

    nw_SetSocketOptions(TCP_socket);
    TCP_active = 1;
  } else {
    mprintf(0, "Cannot create TCP socket (%d)!\n", WSAGetLastError());
  }

tcp_done:
  int ret;
  uint32_t isocktrue = 1;

  setsockopt(TCP_socket, SOL_SOCKET, SO_REUSEADDR, (LPSTR)&isocktrue, sizeof(isocktrue));
  ret = setsockopt(TCP_socket, SOL_SOCKET, SO_BROADCAST, (LPSTR)&isocktrue, sizeof(uint32_t));
  if (ret == SOCKET_ERROR) {
    int wserr;
    wserr = WSAGetLastError();
    if ((wserr == WSAENOPROTOOPT) || (wserr == WSAEINVAL)) {
      mprintf(0, "Unable to make socket broadcastable!");

      Int3(); // Get Kevin
    }
  }

  Sockets_initted = 1;