gistfile1.c

tpeer peer_create(int isServer)
{
  init();
  speer *p = (speer *)malloc(sizeof(speer));
  sockopt_t broadcast=1;

  if ((p->socket = socket(AF_INET, SOCK_DGRAM, 0)) == -1) {
    perror("socket");
    exit(1);
  }
  if ((setsockopt(p->socket, SOL_SOCKET, SO_BROADCAST,
                  &broadcast, sizeof broadcast)) == -1) {
    perror("setsockopt - SO_SOCKET ");
    exit(1);
  }

  memset(&p->addr, 0, sizeof p->addr);
  p->addr.sin_family = AF_INET;
  p->addr.sin_port = htons(PORT);
  p->addr.sin_addr.s_addr = INADDR_BROADCAST;

  if (isServer) {
    p->addr.sin_addr.s_addr = INADDR_ANY;
    if (bind(p->socket, (struct sockaddr*)&p->addr,
             sizeof p->addr) == -1) {
      perror("bind");
      char buf[32];
      sprintf(buf, "bind %d", WSAGetLastError());
      ulog(buf);
      exit(1);
    }
  }

  return p;
}