libuv-svace-build

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/* Copyright libuv contributors. All rights reserved.
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 *
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 * Permission is hereby granted, free of charge, to any person obtaining a copy
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 * of this software and associated documentation files (the "Software"), to
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 * deal in the Software without restriction, including without limitation the
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 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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 * sell copies of the Software, and to permit persons to whom the Software is
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 * furnished to do so, subject to the following conditions:
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 *
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 * The above copyright notice and this permission notice shall be included in
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 * all copies or substantial portions of the Software.
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 *
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 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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 * IN THE SOFTWARE.
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 */
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#include "uv.h"
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#include "task.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#define CHECK_HANDLE(handle) \
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  ASSERT_NE((uv_udp_t*)(handle) == &recver || (uv_udp_t*)(handle) == &sender, 0)
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#define BUFFER_MULTIPLIER 20
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#define MAX_DGRAM_SIZE (64 * 1024)
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#define NUM_SENDS 40
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#define EXPECTED_MMSG_ALLOCS (NUM_SENDS / BUFFER_MULTIPLIER)
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static uv_udp_t recver;
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static uv_udp_t sender;
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static int recv_cb_called;
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static int received_datagrams;
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static int close_cb_called;
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static int alloc_cb_called;
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static void alloc_cb(uv_handle_t* handle,
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                     size_t suggested_size,
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                     uv_buf_t* buf) {
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  size_t buffer_size;
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  CHECK_HANDLE(handle);
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  /* Only allocate enough room for multiple dgrams if we can actually recv them */
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  buffer_size = MAX_DGRAM_SIZE;
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  if (uv_udp_using_recvmmsg((uv_udp_t*)handle))
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    buffer_size *= BUFFER_MULTIPLIER;
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  /* Actually malloc to exercise free'ing the buffer later */
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  buf->base = malloc(buffer_size);
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  ASSERT_NOT_NULL(buf->base);
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  buf->len = buffer_size;
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  alloc_cb_called++;
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}
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static void close_cb(uv_handle_t* handle) {
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  CHECK_HANDLE(handle);
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  ASSERT(uv_is_closing(handle));
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  close_cb_called++;
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}
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static void recv_cb(uv_udp_t* handle,
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                    ssize_t nread,
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                    const uv_buf_t* rcvbuf,
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                    const struct sockaddr* addr,
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                    unsigned flags) {
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  ASSERT_GE(nread, 0);
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  /* free and return if this is a mmsg free-only callback invocation */
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  if (flags & UV_UDP_MMSG_FREE) {
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    ASSERT_OK(nread);
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    ASSERT_NULL(addr);
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    free(rcvbuf->base);
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    return;
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  }
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  if (nread == 0) {
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    /* There can be no more available data for the time being. */
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    ASSERT_NULL(addr);
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  } else {
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    ASSERT_EQ(4, nread);
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    ASSERT_NOT_NULL(addr);
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    ASSERT_MEM_EQ("PING", rcvbuf->base, nread);
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    received_datagrams++;
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  }
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  recv_cb_called++;
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  if (received_datagrams == NUM_SENDS) {
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    uv_close((uv_handle_t*) handle, close_cb);
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    uv_close((uv_handle_t*) &sender, close_cb);
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  }
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  /* Don't free if the buffer could be reused via mmsg */
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  if (rcvbuf && !(flags & UV_UDP_MMSG_CHUNK))
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    free(rcvbuf->base);
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}
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TEST_IMPL(udp_mmsg) {
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  struct sockaddr_in addr;
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  uv_buf_t buf;
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  int i;
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  ASSERT_OK(uv_ip4_addr("0.0.0.0", TEST_PORT, &addr));
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  ASSERT_OK(uv_udp_init_ex(uv_default_loop(), &recver,
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                           AF_UNSPEC | UV_UDP_RECVMMSG));
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  ASSERT_OK(uv_udp_bind(&recver, (const struct sockaddr*) &addr, 0));
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  ASSERT_OK(uv_udp_recv_start(&recver, alloc_cb, recv_cb));
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  ASSERT_OK(uv_ip4_addr("127.0.0.1", TEST_PORT, &addr));
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  ASSERT_OK(uv_udp_init(uv_default_loop(), &sender));
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  buf = uv_buf_init("PING", 4);
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  for (i = 0; i < NUM_SENDS; i++) {
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    ASSERT_EQ(4, uv_udp_try_send(&sender, &buf, 1, (const struct sockaddr*) &addr));
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  }
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  ASSERT_OK(uv_run(uv_default_loop(), UV_RUN_DEFAULT));
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  ASSERT_EQ(2, close_cb_called);
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  ASSERT_EQ(received_datagrams, NUM_SENDS);
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  ASSERT_OK(sender.send_queue_size);
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  ASSERT_OK(recver.send_queue_size);
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  printf("%d allocs for %d recvs\n", alloc_cb_called, recv_cb_called);
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  /* On platforms that don't support mmsg, each recv gets its own alloc */
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  if (uv_udp_using_recvmmsg(&recver))
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    ASSERT_EQ(alloc_cb_called, EXPECTED_MMSG_ALLOCS);
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  else
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    ASSERT_EQ(alloc_cb_called, recv_cb_called);
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  MAKE_VALGRIND_HAPPY(uv_default_loop());
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  return 0;
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}
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