grpc1.45.2/third_party/libuv/test/test-udp-try-send.c

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 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
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 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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#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 sv_recv_cb_called;

static int close_cb_called;


static void alloc_cb(uv_handle_t* handle,
                     size_t suggested_size,
                     uv_buf_t* buf) {
  static char slab[65536];
  CHECK_HANDLE(handle);
  ASSERT(suggested_size <= sizeof(slab));
  buf->base = slab;
  buf->len = sizeof(slab);
}


static void close_cb(uv_handle_t* handle) {
  CHECK_HANDLE(handle);
  ASSERT(uv_is_closing(handle));
  close_cb_called++;
}


static void sv_recv_cb(uv_udp_t* handle,
                       ssize_t nread,
                       const uv_buf_t* rcvbuf,
                       const struct sockaddr* addr,
                       unsigned flags) {
  ASSERT(nread > 0);

  if (nread == 0) {
    ASSERT(addr == NULL);
    return;
  }

  ASSERT(nread == 4);
  ASSERT(addr != NULL);

  ASSERT(memcmp("EXIT", rcvbuf->base, nread) == 0);
  uv_close((uv_handle_t*) handle, close_cb);
  uv_close((uv_handle_t*) &client, close_cb);

  sv_recv_cb_called++;
}


TEST_IMPL(udp_try_send) {
  struct sockaddr_in addr;
  static char buffer[64 * 1024];
  uv_buf_t buf;
  int r;

  ASSERT(0 == uv_ip4_addr("0.0.0.0", TEST_PORT, &addr));

  r = uv_udp_init(uv_default_loop(), &server);
  ASSERT(r == 0);

  r = uv_udp_bind(&server, (const struct sockaddr*) &addr, 0);
  ASSERT(r == 0);

  r = uv_udp_recv_start(&server, alloc_cb, sv_recv_cb);
  ASSERT(r == 0);

  ASSERT(0 == uv_ip4_addr("127.0.0.1", TEST_PORT, &addr));

  r = uv_udp_init(uv_default_loop(), &client);
  ASSERT(r == 0);

  buf = uv_buf_init(buffer, sizeof(buffer));
  r = uv_udp_try_send(&client, &buf, 1, (const struct sockaddr*) &addr);
  ASSERT(r == UV_EMSGSIZE);

  buf = uv_buf_init("EXIT", 4);
  r = uv_udp_try_send(&client, &buf, 1, (const struct sockaddr*) &addr);
  ASSERT(r == 4);

  uv_run(uv_default_loop(), UV_RUN_DEFAULT);

  ASSERT(close_cb_called == 2);
  ASSERT(sv_recv_cb_called == 1);

  ASSERT(client.send_queue_size == 0);
  ASSERT(server.send_queue_size == 0);

  MAKE_VALGRIND_HAPPY();
  return 0;
}