/* 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>

#endif

static int shutdown_cb_called = 0;

static int shutdown_requested = 0;

static int connect_cb_called = 0;

static int write_cb_called = 0;

static int close_cb_called = 0;

static uv_connect_t connect_req;

static uv_shutdown_t shutdown_req;

static uv_write_t write_req;

static uv_timer_t tm;

static uv_tcp_t client;

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_tcp_socket(void) {

  uv_os_sock_t sock;

  sock = socket(AF_INET, SOCK_STREAM, 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 shutdown_cb(uv_shutdown_t* req, int status) {

  ASSERT(req == &shutdown_req);

  ASSERT(status == 0);

  /* Now we wait for the EOF */

  shutdown_cb_called++;

}

static void read_cb(uv_stream_t* tcp, ssize_t nread, const uv_buf_t* buf) {

  ASSERT(tcp != NULL);

  if (nread >= 0) {

    ASSERT(nread == 4);

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

  }

  else {

    ASSERT(nread == UV_EOF);

    uv_close((uv_handle_t*)tcp, close_cb);

  }

}

static void read1_cb(uv_stream_t* tcp, ssize_t nread, const uv_buf_t* buf) {

  int i;

  ASSERT(tcp != NULL);

  if (nread >= 0) {

    for (i = 0; i < nread; ++i)

      ASSERT(buf->base[i] == 'P');

  } else {

    ASSERT(nread == UV_EOF);

    printf("GOT EOF\n");

    uv_close((uv_handle_t*)tcp, close_cb);

  }

}

static void write_cb(uv_write_t* req, int status) {

  ASSERT(req != NULL);

  if (status) {

    fprintf(stderr, "uv_write error: %s\n", uv_strerror(status));

    ASSERT(0);

  }

  write_cb_called++;

}

static void write1_cb(uv_write_t* req, int status) {

  uv_buf_t buf;

  int r;

  ASSERT(req != NULL);

  if (status) {

    ASSERT(shutdown_cb_called);

    return;

  }

  if (shutdown_requested)

    return;

  buf = uv_buf_init("P", 1);

  r = uv_write(&write_req, req->handle, &buf, 1, write1_cb);

  ASSERT(r == 0);

  write_cb_called++;

}

static void timer_cb(uv_timer_t* handle) {

  int r;

  /* Shutdown on drain. */

  r = uv_shutdown(&shutdown_req, (uv_stream_t*) &client, shutdown_cb);

  ASSERT(r == 0);

  shutdown_requested++;

}

static void connect_cb(uv_connect_t* req, int status) {

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

  uv_stream_t* stream;

  int r;

  ASSERT(req == &connect_req);

  ASSERT(status == 0);

  stream = req->handle;

  connect_cb_called++;

  r = uv_write(&write_req, stream, &buf, 1, write_cb);

  ASSERT(r == 0);

  /* Shutdown on drain. */

  r = uv_shutdown(&shutdown_req, stream, shutdown_cb);

  ASSERT(r == 0);

  /* Start reading */

  r = uv_read_start(stream, alloc_cb, read_cb);

  ASSERT(r == 0);

}

static void connect1_cb(uv_connect_t* req, int status) {

  uv_buf_t buf;

  uv_stream_t* stream;

  int r;

  ASSERT(req == &connect_req);

  ASSERT(status == 0);

  stream = req->handle;

  connect_cb_called++;

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

  ASSERT(r == 0);

  r = uv_timer_start(&tm, timer_cb, 2000, 0);

  ASSERT(r == 0);

  buf = uv_buf_init("P", 1);

  r = uv_write(&write_req, stream, &buf, 1, write1_cb);

  ASSERT(r == 0);

  /* Start reading */

  r = uv_read_start(stream, alloc_cb, read1_cb);

  ASSERT(r == 0);

}

TEST_IMPL(tcp_open) {

  struct sockaddr_in addr;

  uv_os_sock_t sock;

  int r;

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

  startup();

  sock = create_tcp_socket();

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

  ASSERT(r == 0);

  r = uv_tcp_open(&client, sock);

  ASSERT(r == 0);

  r = uv_tcp_connect(&connect_req,

                     &client,

                     (const struct sockaddr*) &addr,

                     connect_cb);

  ASSERT(r == 0);

#ifndef _WIN32

  {

    uv_tcp_t client2;

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

    ASSERT(r == 0);

    r = uv_tcp_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(shutdown_cb_called == 1);

  ASSERT(connect_cb_called == 1);

  ASSERT(write_cb_called == 1);

  ASSERT(close_cb_called == 1);

  MAKE_VALGRIND_HAPPY();

  return 0;

}

TEST_IMPL(tcp_open_twice) {

  uv_tcp_t client;

  uv_os_sock_t sock1, sock2;

  int r;

  startup();

  sock1 = create_tcp_socket();

  sock2 = create_tcp_socket();

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

  ASSERT(r == 0);

  r = uv_tcp_open(&client, sock1);

  ASSERT(r == 0);

  r = uv_tcp_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(tcp_open_bound) {

  struct sockaddr_in addr;

  uv_tcp_t server;

  uv_os_sock_t sock;

  startup();

  sock = create_tcp_socket();

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

  ASSERT(0 == uv_tcp_init(uv_default_loop(), &server));

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

  ASSERT(0 == uv_tcp_open(&server, sock));

  ASSERT(0 == uv_listen((uv_stream_t*) &server, 128, NULL));

  MAKE_VALGRIND_HAPPY();

  return 0;

}

TEST_IMPL(tcp_open_connected) {

  struct sockaddr_in addr;

  uv_tcp_t client;

  uv_os_sock_t sock;

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

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

  startup();

  sock = create_tcp_socket();

  ASSERT(0 == connect(sock, (struct sockaddr*) &addr,  sizeof(addr)));

  ASSERT(0 == uv_tcp_init(uv_default_loop(), &client));

  ASSERT(0 == uv_tcp_open(&client, sock));

  ASSERT(0 == uv_write(&write_req, (uv_stream_t*) &client, &buf, 1, write_cb));

  ASSERT(0 == uv_shutdown(&shutdown_req, (uv_stream_t*) &client, shutdown_cb));

  ASSERT(0 == uv_read_start((uv_stream_t*) &client, alloc_cb, read_cb));

  uv_run(uv_default_loop(), UV_RUN_DEFAULT);

  ASSERT(shutdown_cb_called == 1);

  ASSERT(write_cb_called == 1);

  ASSERT(close_cb_called == 1);

  MAKE_VALGRIND_HAPPY();

  return 0;

}

TEST_IMPL(tcp_write_ready) {

  struct sockaddr_in addr;

  uv_os_sock_t sock;

  int r;

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

  startup();

  sock = create_tcp_socket();

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

  ASSERT(r == 0);

  r = uv_tcp_open(&client, sock);

  ASSERT(r == 0);

  r = uv_tcp_connect(&connect_req,

                     &client,

                     (const struct sockaddr*) &addr,

                     connect1_cb);

  ASSERT(r == 0);

  uv_run(uv_default_loop(), UV_RUN_DEFAULT);

  ASSERT(shutdown_cb_called == 1);

  ASSERT(shutdown_requested == 1);

  ASSERT(connect_cb_called == 1);

  ASSERT(write_cb_called > 0);

  ASSERT(close_cb_called == 1);

  MAKE_VALGRIND_HAPPY();

  return 0;

}