test: add udp-mmsg test

PR-URL: https://github.com/libuv/libuv/pull/2818
Reviewed-By: Jameson Nash <vtjnash@gmail.com>

CMakeLists.txt

@@ -505,6 +505,7 @@ if(LIBUV_BUILD_TESTS)
        test/test-udp-create-socket-early.c
        test/test-udp-dgram-too-big.c
        test/test-udp-ipv6.c
+       test/test-udp-mmsg.c
        test/test-udp-multicast-interface.c
        test/test-udp-multicast-interface6.c
        test/test-udp-multicast-join.c

Makefile.am

@@ -290,6 +290,7 @@ test_run_tests_SOURCES = test/blackhole-server.c \
                          test/test-udp-create-socket-early.c \
                          test/test-udp-dgram-too-big.c \
                          test/test-udp-ipv6.c \
+                         test/test-udp-mmsg.c \
                          test/test-udp-multicast-interface.c \
                          test/test-udp-multicast-interface6.c \
                          test/test-udp-multicast-join.c \

test/test-list.h

@@ -163,6 +163,7 @@ TEST_DECLARE   (udp_send_and_recv)
 TEST_DECLARE   (udp_send_hang_loop)
 TEST_DECLARE   (udp_send_immediate)
 TEST_DECLARE   (udp_send_unreachable)
+TEST_DECLARE   (udp_mmsg)
 TEST_DECLARE   (udp_multicast_join)
 TEST_DECLARE   (udp_multicast_join6)
 TEST_DECLARE   (udp_multicast_ttl)
@@ -723,6 +724,7 @@ TASK_LIST_START
   TEST_ENTRY  (udp_options)
   TEST_ENTRY  (udp_options6)
   TEST_ENTRY  (udp_no_autobind)
+  TEST_ENTRY  (udp_mmsg)
   TEST_ENTRY  (udp_multicast_interface)
   TEST_ENTRY  (udp_multicast_interface6)
   TEST_ENTRY  (udp_multicast_join)

test/test-udp-mmsg.c

@@ -0,0 +1,126 @@
+/* Copyright libuv 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) == &recver || (uv_udp_t*)(handle) == &sender)
+
+#define BUFFER_MULTIPLIER 4
+#define BUFFER_SIZE (BUFFER_MULTIPLIER * 64 * 1024)
+#define NUM_SENDS 8
+#define EXPECTED_MMSG_ALLOCS (NUM_SENDS / BUFFER_MULTIPLIER)
+
+static uv_udp_t recver;
+static uv_udp_t sender;
+static int recv_cb_called;
+static int close_cb_called;
+static int alloc_cb_called;
+
+
+static void alloc_cb(uv_handle_t* handle,
+                     size_t suggested_size,
+                     uv_buf_t* buf) {
+  CHECK_HANDLE(handle);
+  /* Actually malloc to exercise free'ing the buffer later */
+  buf->base = malloc(BUFFER_SIZE);
+  ASSERT(buf->base != NULL);
+  buf->len = BUFFER_SIZE;
+  alloc_cb_called++;
+}
+
+
+static void close_cb(uv_handle_t* handle) {
+  CHECK_HANDLE(handle);
+  ASSERT(uv_is_closing(handle));
+  close_cb_called++;
+}
+
+
+static void recv_cb(uv_udp_t* handle,
+                       ssize_t nread,
+                       const uv_buf_t* rcvbuf,
+                       const struct sockaddr* addr,
+                       unsigned flags) {
+  ASSERT_GE(nread, 0);
+
+  if (nread > 0) {
+    ASSERT_EQ(nread, 4);
+    ASSERT(addr != NULL);
+    ASSERT_MEM_EQ("PING", rcvbuf->base, nread);
+
+    recv_cb_called++;
+    if (recv_cb_called == NUM_SENDS) {
+      uv_close((uv_handle_t*)handle, close_cb);
+      uv_close((uv_handle_t*)&sender, close_cb);
+    }
+  }
+
+  /* Don't free if the buffer could be reused via mmsg */
+  if (rcvbuf && !(flags & UV_UDP_MMSG_CHUNK))
+    free(rcvbuf->base);
+}
+
+
+TEST_IMPL(udp_mmsg) {
+  struct sockaddr_in addr;
+  uv_buf_t buf;
+  int i;
+
+  ASSERT_EQ(0, uv_ip4_addr("0.0.0.0", TEST_PORT, &addr));
+
+  ASSERT_EQ(0, uv_udp_init_ex(uv_default_loop(), &recver,
+                              AF_UNSPEC | UV_UDP_RECVMMSG));
+
+  ASSERT_EQ(0, uv_udp_bind(&recver, (const struct sockaddr*) &addr, 0));
+
+  ASSERT_EQ(0, uv_udp_recv_start(&recver, alloc_cb, recv_cb));
+
+  ASSERT_EQ(0, uv_ip4_addr("127.0.0.1", TEST_PORT, &addr));
+
+  ASSERT_EQ(0, uv_udp_init(uv_default_loop(), &sender));
+
+  buf = uv_buf_init("PING", 4);
+  for (i = 0; i < NUM_SENDS; i++) {
+    ASSERT_EQ(4, uv_udp_try_send(&sender, &buf, 1, (const struct sockaddr*) &addr));
+  }
+
+  ASSERT_EQ(0, uv_run(uv_default_loop(), UV_RUN_DEFAULT));
+
+  ASSERT_EQ(close_cb_called, 2);
+  ASSERT_EQ(recv_cb_called, NUM_SENDS);
+
+  ASSERT_EQ(sender.send_queue_size, 0);
+  ASSERT_EQ(recver.send_queue_size, 0);
+
+  printf("%d allocs for %d recvs\n", alloc_cb_called, recv_cb_called);
+
+  /* On platforms that don't support mmsg, each recv gets its own alloc */
+  ASSERT(alloc_cb_called == EXPECTED_MMSG_ALLOCS || alloc_cb_called == recv_cb_called);
+
+  MAKE_VALGRIND_HAPPY();
+  return 0;
+}