Function main

test/sockets/test_tcp_server.c:130–178

}

int main(void) {
  listen_fd = socket(AF_INET, SOCK_STREAM, 0);
  assert(listen_fd >= 0);

#ifndef NO_EXPLICIT_BIND
  struct sockaddr_in addr;
  memset(&addr, 0, sizeof(addr));
  addr.sin_family = AF_INET;
  addr.sin_port = htons(0); // ephemeral
  inet_pton(AF_INET, "127.0.0.1", &addr.sin_addr);
  if (bind(listen_fd, (struct sockaddr*)&addr, sizeof(addr)) != 0) {
    perror("bind");
    return 1;
  }
#endif
  // With NO_EXPLICIT_BIND, listen() must auto-bind an ephemeral port (POSIX),
  // and getsockname() below must still report it.
  if (listen(listen_fd, 4) != 0) {
    perror("listen");
    return 1;
  }

  // The OS-assigned ephemeral port must be readable synchronously.
  struct sockaddr_in la;
  socklen_t ll = sizeof(la);
  if (getsockname(listen_fd, (struct sockaddr*)&la, &ll) != 0) {
    perror("getsockname");
    return 1;
  }
  assert(ntohs(la.sin_port) != 0);
  printf("listening on 127.0.0.1:%u\n", (unsigned)ntohs(la.sin_port));
  set_nonblocking(listen_fd);

  memset(&dest, 0, sizeof(dest));
  dest.sin_family = AF_INET;
  dest.sin_port = la.sin_port;
  inet_pton(AF_INET, "127.0.0.1", &dest.sin_addr);
  start_client();

#ifdef __EMSCRIPTEN__
  emscripten_set_main_loop(main_loop, 0, 0);
#else
  while (1) {
    main_loop();
    usleep(1000);
  }
#endif
  return 0;
}