/* 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>

#ifndef _WIN32

# include <unistd.h>

# include <sys/socket.h>

# include <sys/un.h>

#endif

static int send_cb_called = 0;

static int close_cb_called = 0;

static uv_udp_send_t send_req;

static void startup(void) {

#ifdef _WIN32

    struct WSAData wsa_data;

    int r = WSAStartup(MAKEWORD(2, 2), &wsa_data);

    ASSERT(r == 0);

#endif

}

static uv_os_sock_t create_udp_socket(void) {

  uv_os_sock_t sock;

  sock = socket(AF_INET, SOCK_DGRAM, IPPROTO_IP);

#ifdef _WIN32

  ASSERT(sock != INVALID_SOCKET);

#else

  ASSERT(sock >= 0);

#endif

#ifndef _WIN32

  {

    /* Allow reuse of the port. */

    int yes = 1;

    int r = setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof yes);

    ASSERT(r == 0);

  }

#endif

  return sock;

}

static void close_socket(uv_os_sock_t sock) {

  int r;

#ifdef _WIN32

  r = closesocket(sock);

#else

  r = close(sock);

#endif

  ASSERT(r == 0);

}

static void alloc_cb(uv_handle_t* handle,

                     size_t suggested_size,

                     uv_buf_t* buf) {

  static char slab[65536];

  ASSERT(suggested_size <= sizeof(slab));

  buf->base = slab;

  buf->len = sizeof(slab);

}

static void close_cb(uv_handle_t* handle) {

  ASSERT(handle != NULL);

  close_cb_called++;

}

static void recv_cb(uv_udp_t* handle,

                       ssize_t nread,

                       const uv_buf_t* buf,

                       const struct sockaddr* addr,

                       unsigned flags) {

  int r;

  if (nread < 0) {

    ASSERT(0 && "unexpected error");

  }

  if (nread == 0) {

    /* Returning unused buffer. Don't count towards sv_recv_cb_called */

    ASSERT(addr == NULL);

    return;

  }

  ASSERT(flags == 0);

  ASSERT(addr != NULL);

  ASSERT(nread == 4);

  ASSERT(memcmp("PING", buf->base, nread) == 0);

  r = uv_udp_recv_stop(handle);

  ASSERT(r == 0);

  uv_close((uv_handle_t*) handle, close_cb);

}

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

  ASSERT(req != NULL);

  ASSERT(status == 0);

  send_cb_called++;

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

}

TEST_IMPL(udp_open) {

  struct sockaddr_in addr;

  uv_buf_t buf = uv_buf_init("PING", 4);

  uv_udp_t client;

  uv_os_sock_t sock;

  int r;

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

  startup();

  sock = create_udp_socket();

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

  ASSERT(r == 0);

  r = uv_udp_open(&client, sock);

  ASSERT(r == 0);

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

  ASSERT(r == 0);

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

  ASSERT(r == 0);

  r = uv_udp_send(&send_req,

                  &client,

                  &buf,

                  1,

                  (const struct sockaddr*) &addr,

                  send_cb);

  ASSERT(r == 0);

#ifndef _WIN32

  {

    uv_udp_t client2;

    r = uv_udp_init(uv_default_loop(), &client2);

    ASSERT(r == 0);

    r = uv_udp_open(&client2, sock);

    ASSERT(r == UV_EEXIST);

    uv_close((uv_handle_t*) &client2, NULL);

  }

#endif  /* !_WIN32 */

  uv_run(uv_default_loop(), UV_RUN_DEFAULT);

  ASSERT(send_cb_called == 1);

  ASSERT(close_cb_called == 1);

  ASSERT(client.send_queue_size == 0);

  MAKE_VALGRIND_HAPPY();

  return 0;

}

TEST_IMPL(udp_open_twice) {

  uv_udp_t client;

  uv_os_sock_t sock1, sock2;

  int r;

  startup();

  sock1 = create_udp_socket();

  sock2 = create_udp_socket();

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

  ASSERT(r == 0);

  r = uv_udp_open(&client, sock1);

  ASSERT(r == 0);

  r = uv_udp_open(&client, sock2);

  ASSERT(r == UV_EBUSY);

  close_socket(sock2);

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

  uv_run(uv_default_loop(), UV_RUN_DEFAULT);

  MAKE_VALGRIND_HAPPY();

  return 0;

}

TEST_IMPL(udp_open_bound) {

  struct sockaddr_in addr;

  uv_udp_t client;

  uv_os_sock_t sock;

  int r;

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

  startup();

  sock = create_udp_socket();

  r = bind(sock, (struct sockaddr*) &addr, sizeof(addr));

  ASSERT(r == 0);

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

  ASSERT(r == 0);

  r = uv_udp_open(&client, sock);

  ASSERT(r == 0);

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

  ASSERT(r == 0);

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

  uv_run(uv_default_loop(), UV_RUN_DEFAULT);

  MAKE_VALGRIND_HAPPY();

  return 0;

}

TEST_IMPL(udp_open_connect) {

  struct sockaddr_in addr;

  uv_buf_t buf = uv_buf_init("PING", 4);

  uv_udp_t client;

  uv_udp_t server;

  uv_os_sock_t sock;

  int r;

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

  startup();

  sock = create_udp_socket();

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

  ASSERT(r == 0);

  r = connect(sock, (const struct sockaddr*) &addr, sizeof(addr));

  ASSERT(r == 0);

  r = uv_udp_open(&client, sock);

  ASSERT(r == 0);

  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, recv_cb);

  ASSERT(r == 0);

  r = uv_udp_send(&send_req,

                  &client,

                  &buf,

                  1,

                  NULL,

                  send_cb);

  ASSERT(r == 0);

  uv_run(uv_default_loop(), UV_RUN_DEFAULT);

  ASSERT(send_cb_called == 1);

  ASSERT(close_cb_called == 2);

  ASSERT(client.send_queue_size == 0);

  MAKE_VALGRIND_HAPPY();

  return 0;

}

#ifndef _WIN32

TEST_IMPL(udp_send_unix) {

  /* Test that "uv_udp_send()" supports sending over

     a "sockaddr_un" address. */

  struct sockaddr_un addr;

  uv_udp_t handle;

  uv_udp_send_t req;

  uv_loop_t* loop;

  uv_buf_t buf = uv_buf_init("PING", 4);

  int fd;

  int r;

  loop = uv_default_loop();

  memset(&addr, 0, sizeof addr);

  addr.sun_family = AF_UNIX;

  ASSERT(strlen(TEST_PIPENAME) < sizeof(addr.sun_path));

  memcpy(addr.sun_path, TEST_PIPENAME, strlen(TEST_PIPENAME));

  fd = socket(AF_UNIX, SOCK_STREAM, 0);

  ASSERT(fd >= 0);

  unlink(TEST_PIPENAME);

  ASSERT(0 == bind(fd, (const struct sockaddr*)&addr, sizeof addr));

  ASSERT(0 == listen(fd, 1));

  r = uv_udp_init(loop, &handle);

  ASSERT(r == 0);

  r = uv_udp_open(&handle, fd);

  ASSERT(r == 0);

  uv_run(loop, UV_RUN_DEFAULT);

  r = uv_udp_send(&req,

                  &handle,

                  &buf,

                  1,

                  (const struct sockaddr*) &addr,

                  NULL);

  ASSERT(r == 0);

  uv_close((uv_handle_t*)&handle, NULL);

  uv_run(loop, UV_RUN_DEFAULT);

  close(fd);

  unlink(TEST_PIPENAME);

  MAKE_VALGRIND_HAPPY();

  return 0;

}

#endif