/* 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>

typedef struct {

  uv_tcp_t handle;

  uv_shutdown_t shutdown_req;

} conn_rec;

static uv_tcp_t tcp_server;

static void connection_cb(uv_stream_t* stream, int status);

static void alloc_cb(uv_handle_t* handle, size_t suggested_size, uv_buf_t* buf);

static void read_cb(uv_stream_t* stream, ssize_t nread, const uv_buf_t* buf);

static void shutdown_cb(uv_shutdown_t* req, int status);

static void close_cb(uv_handle_t* handle);

static void connection_cb(uv_stream_t* stream, int status) {

  conn_rec* conn;

  int r;

  ASSERT(status == 0);

  ASSERT(stream == (uv_stream_t*)&tcp_server);

  conn = malloc(sizeof *conn);

  ASSERT(conn != NULL);

  r = uv_tcp_init(stream->loop, &conn->handle);

  ASSERT(r == 0);

  r = uv_accept(stream, (uv_stream_t*)&conn->handle);

  ASSERT(r == 0);

  r = uv_read_start((uv_stream_t*)&conn->handle, alloc_cb, read_cb);

  ASSERT(r == 0);

}

static void alloc_cb(uv_handle_t* handle,

                     size_t suggested_size,

                     uv_buf_t* buf) {

  static char slab[65536];

  buf->base = slab;

  buf->len = sizeof(slab);

}

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

  conn_rec* conn;

  int r;

  if (nread >= 0)

    return;

  ASSERT(nread == UV_EOF);

  conn = container_of(stream, conn_rec, handle);

  r = uv_shutdown(&conn->shutdown_req, stream, shutdown_cb);

  ASSERT(r == 0);

}

static void shutdown_cb(uv_shutdown_t* req, int status) {

  conn_rec* conn = container_of(req, conn_rec, shutdown_req);

  uv_close((uv_handle_t*)&conn->handle, close_cb);

}

static void close_cb(uv_handle_t* handle) {

  conn_rec* conn = container_of(handle, conn_rec, handle);

  free(conn);

}

HELPER_IMPL(tcp4_blackhole_server) {

  struct sockaddr_in addr;

  uv_loop_t* loop;

  int r;

  loop = uv_default_loop();

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

  r = uv_tcp_init(loop, &tcp_server);

  ASSERT(r == 0);

  r = uv_tcp_bind(&tcp_server, (const struct sockaddr*) &addr, 0);

  ASSERT(r == 0);

  r = uv_listen((uv_stream_t*)&tcp_server, 128, connection_cb);

  ASSERT(r == 0);

  r = uv_run(loop, UV_RUN_DEFAULT);

  ASSERT(0 && "Blackhole server dropped out of event loop.");

  return 0;

}