test: add multicast TTL test

test/test-list.h

@@ -47,6 +47,7 @@ TEST_DECLARE   (tcp_bind6_error_inval)
 TEST_DECLARE   (tcp_bind6_localhost_ok)
 TEST_DECLARE   (udp_send_and_recv)
 TEST_DECLARE   (udp_multicast_join)
+TEST_DECLARE   (udp_multicast_ttl)
 TEST_DECLARE   (udp_dgram_too_big)
 TEST_DECLARE   (udp_dual_stack)
 TEST_DECLARE   (udp_ipv6_only)
@@ -191,6 +192,7 @@ TASK_LIST_START
   TEST_ENTRY  (udp_ipv6_only)
   TEST_ENTRY  (udp_options)
   TEST_ENTRY  (udp_multicast_join)
+  TEST_ENTRY  (udp_multicast_ttl)
 
   TEST_ENTRY  (pipe_bind_error_addrinuse)
   TEST_ENTRY  (pipe_bind_error_addrnotavail)

test/test-udp-multicast-ttl.c

@@ -0,0 +1,89 @@
+/* Copyright Joyent, Inc. and other Node contributors. All rights reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#include "uv.h"
+#include "task.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define CHECK_HANDLE(handle) \
+  ASSERT((uv_udp_t*)(handle) == &server || (uv_udp_t*)(handle) == &client)
+
+static uv_udp_t server;
+static uv_udp_t client;
+
+static int cl_recv_cb_called;
+
+static int sv_send_cb_called;
+
+static int close_cb_called;
+
+
+static void close_cb(uv_handle_t* handle) {
+  CHECK_HANDLE(handle);
+  close_cb_called++;
+}
+
+
+static void sv_send_cb(uv_udp_send_t* req, int status) {
+  ASSERT(req != NULL);
+  ASSERT(status == 0);
+  CHECK_HANDLE(req->handle);
+
+  sv_send_cb_called++;
+
+  uv_close((uv_handle_t*) req->handle, close_cb);
+}
+
+
+TEST_IMPL(udp_multicast_ttl) {
+  int r;
+  uv_udp_send_t req;
+  uv_buf_t buf;
+  struct sockaddr_in addr = uv_ip4_addr("239.255.0.1", TEST_PORT);
+
+  r = uv_udp_init(uv_default_loop(), &server);
+  ASSERT(r == 0);
+
+  r = uv_udp_bind(&server, uv_ip4_addr("0.0.0.0", 0), 0);
+  ASSERT(r == 0);
+
+  r = uv_udp_set_multicast_ttl(&server, 32);
+  ASSERT(r == 0);
+
+  /* server sends "PING" */
+  buf = uv_buf_init("PING", 4);
+  r = uv_udp_send(&req, &server, &buf, 1, addr, sv_send_cb);
+  ASSERT(r == 0);
+
+  ASSERT(close_cb_called == 0);
+  ASSERT(sv_send_cb_called == 0);
+
+  /* run the loop till all events are processed */
+  uv_run(uv_default_loop());
+
+  ASSERT(sv_send_cb_called == 1);
+  ASSERT(close_cb_called == 1);
+
+  return 0;
+}

uv.gyp

@@ -321,6 +321,7 @@
         'test/test-udp-send-and-recv.c',
         'test/test-udp-multicast-join.c',
         'test/test-counters-init.c',
+        'test/test-udp-multicast-ttl.c',
       ],
       'conditions': [
         [ 'OS=="win"', {