1 files changed, 98 insertions, 0 deletions
diff --git a/tests/sockets/test_sockets_select.c b/tests/sockets/test_sockets_select.c
new file mode 100644
index 00000000..e05bd4c8
--- /dev/null
+++ b/tests/sockets/test_sockets_select.c
@@ -0,0 +1,98 @@
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+#include <assert.h>
+#if EMSCRIPTEN
+#include <emscripten.h>
+#endif
+
+#define EXPECTED_BYTES 5
+
+int sockfd = -1;
+
+void finish(int result) {
+  close(sockfd);
+#if EMSCRIPTEN
+  REPORT_RESULT();
+#endif
+  exit(result);
+}
+
+void iter(void *arg) {
+  static int retries = 0;
+
+  fd_set sett;
+  FD_ZERO(&sett);
+  FD_SET(sockfd, &sett);
+  
+  // currently, we've connected to a closed server port.
+  // the initial async connect "succeeded" and select
+  // should say that the socket is ready for a non-blocking
+  // read, however, the read should be 0 sized signalling
+  // that the remote end has closed.
+  int handles = select(64, &sett, NULL, NULL, NULL);
+  if (handles == -1) {
+    perror("select failed");
+    finish(EXIT_FAILURE);
+  }
+
+  if (FD_ISSET(sockfd, &sett)) {
+    char buffer[1024];
+    int n = recv(sockfd, buffer, sizeof(buffer), 0);
+    if (n == -1 && retries++ > 10) {
+      perror("revv failed");
+      finish(EXIT_FAILURE);
+    } else if (!n) {
+      perror("Connection to websocket server failed as expected.");
+      finish(266);
+    }
+  }
+}
+
+// This is for testing a websocket connection to a closed server port.
+// The connect call will succeed (due to the asynchronous websocket
+// behavior) but once the underlying websocket system realized that 
+// the connection cannot be established, the next select call will fail.
+int main() {
+  struct sockaddr_in addr;
+  int res;
+
+  sockfd = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
+  if (sockfd == -1) {
+    perror("cannot create socket");
+    finish(EXIT_FAILURE);
+  }
+  fcntl(sockfd, F_SETFL, O_NONBLOCK);
+
+  memset(&addr, 0, sizeof(addr));
+  addr.sin_family = AF_INET;
+  addr.sin_port = htons(SOCKK);
+  if (inet_pton(AF_INET, "127.0.0.1", &addr.sin_addr) != 1) {
+    perror("inet_pton failed");
+    finish(EXIT_FAILURE);
+  }
+
+  // This call should succeed (even if the server port is closed)
+  res = connect(sockfd, (struct sockaddr *)&addr, sizeof(addr));
+  if (res == -1 && errno != EINPROGRESS) {
+    perror("connect failed");
+    finish(EXIT_FAILURE);
+  }
+
+#if EMSCRIPTEN
+  emscripten_set_main_loop(iter, 0, 0);
+#else
+  while (1) iter(NULL);
+#endif
+  
+  return EXIT_FAILURE;
+}
+