urbit/outside/libuv-v1.7.5/test/test-udp-dgram-too-big.c

/* Copyright Joyent, Inc. and other Node contributors. All rights reserved.
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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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#include "uv.h"
#include "task.h"

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define CHECK_HANDLE(handle) \
  ASSERT((uv_udp_t*)(handle) == &handle_)

#define CHECK_REQ(req) \
  ASSERT((req) == &req_);

static uv_udp_t handle_;
static uv_udp_send_t req_;

static int send_cb_called;
static int close_cb_called;


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


static void send_cb(uv_udp_send_t* req, int status) {
  CHECK_REQ(req);
  CHECK_HANDLE(req->handle);

  ASSERT(status == UV_EMSGSIZE);

  uv_close((uv_handle_t*)req->handle, close_cb);
  send_cb_called++;
}


TEST_IMPL(udp_dgram_too_big) {
  char dgram[65536]; /* 64K MTU is unlikely, even on localhost */
  struct sockaddr_in addr;
  uv_buf_t buf;
  int r;

  memset(dgram, 42, sizeof dgram); /* silence valgrind */

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

  buf = uv_buf_init(dgram, sizeof dgram);
  ASSERT(0 == uv_ip4_addr("127.0.0.1", TEST_PORT, &addr));

  r = uv_udp_send(&req_,
                  &handle_,
                  &buf,
                  1,
                  (const struct sockaddr*) &addr,
                  send_cb);
  ASSERT(r == 0);

  ASSERT(close_cb_called == 0);
  ASSERT(send_cb_called == 0);

  uv_run(uv_default_loop(), UV_RUN_DEFAULT);

  ASSERT(send_cb_called == 1);
  ASSERT(close_cb_called == 1);

  MAKE_VALGRIND_HAPPY();
  return 0;
}