/* 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) == &client)

static uv_udp_t client;

static uv_timer_t timer;

static int send_cb_called;

static int recv_cb_called;

static int close_cb_called;

static int alloc_cb_called;

static int timer_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);

  alloc_cb_called++;

}

static void close_cb(uv_handle_t* handle) {

  ASSERT(1 == uv_is_closing(handle));

  close_cb_called++;

}

static void send_cb(uv_udp_send_t* req, int status) {

  ASSERT(req != NULL);

  ASSERT(status == 0);

  CHECK_HANDLE(req->handle);

  send_cb_called++;

}

static void recv_cb(uv_udp_t* handle,

                       ssize_t nread,

                       const uv_buf_t* rcvbuf,

                       const struct sockaddr* addr,

                       unsigned flags) {

  CHECK_HANDLE(handle);

  recv_cb_called++;

  if (nread < 0) {

    ASSERT(0 && "unexpected error");

  } else if (nread == 0) {

    /* Returning unused buffer */

    ASSERT(addr == NULL);

  } else {

    ASSERT(addr != NULL);

  }

}

static void timer_cb(uv_timer_t* h) {

  ASSERT(h == &timer;;

  timer_cb_called++;

  uv_close((uv_handle_t*) &client, close_cb);

  uv_close((uv_handle_t*) h, close_cb);

}

TEST_IMPL(udp_send_unreachable) {

  struct sockaddr_in addr;

  struct sockaddr_in addr2;

  uv_udp_send_t req1, req2;

  uv_buf_t buf;

  int r;

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

  ASSERT(0 == uv_ip4_addr("127.0.0.1", TEST_PORT_2, &addr2));

  r = uv_timer_init( uv_default_loop(), &timer );

  ASSERT(r == 0);

  r = uv_timer_start( &timer, timer_cb, 1000, 0 );

  ASSERT(r == 0);

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

  ASSERT(r == 0);

  r = uv_udp_bind(&client, (const struct sockaddr*) &addr2, 0);

  ASSERT(r == 0);

  r = uv_udp_recv_start(&client, alloc_cb, recv_cb);

  ASSERT(r == 0);

  /* client sends "PING", then "PANG" */

  buf = uv_buf_init("PING", 4);

  r = uv_udp_send(&req1,

                  &client,

                  &buf,

                  1,

                  (const struct sockaddr*) &addr,

                  send_cb);

  ASSERT(r == 0);

  buf = uv_buf_init("PANG", 4);

  r = uv_udp_send(&req2,

                  &client,

                  &buf,

                  1,

                  (const struct sockaddr*) &addr,

                  send_cb);

  ASSERT(r == 0);

  uv_run(uv_default_loop(), UV_RUN_DEFAULT);

  ASSERT(send_cb_called == 2);

  ASSERT(recv_cb_called == alloc_cb_called);

  ASSERT(timer_cb_called == 1);

  ASSERT(close_cb_called == 2);

  MAKE_VALGRIND_HAPPY();

  return 0;

}