text: /* 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>
  
  static void connection_cb(uv_stream_t* server, int status);
  static void connect_cb(uv_connect_t* req, int status);
  static void write_cb(uv_write_t* req, int status);
  static void read_cb(uv_stream_t* stream, ssize_t nread, const uv_buf_t* buf);
  static void alloc_cb(uv_handle_t* handle, size_t suggested_size, uv_buf_t* buf);
  
  static uv_tcp_t tcp_server;
  static uv_tcp_t tcp_client;
  static uv_tcp_t tcp_peer; /* client socket as accept()-ed by server */
  static uv_connect_t connect_req;
  static uv_write_t write_req;
  
  static int write_cb_called;
  static int read_cb_called;
  
  static void connection_cb(uv_stream_t* server, int status) {
    int r;
    uv_buf_t buf;
  
    ASSERT(server == (uv_stream_t*)&tcp_server);
    ASSERT(status == 0);
  
    r = uv_tcp_init(server->loop, &tcp_peer);
    ASSERT(r == 0);
  
    r = uv_accept(server, (uv_stream_t*)&tcp_peer);
    ASSERT(r == 0);
  
    r = uv_read_start((uv_stream_t*)&tcp_peer, alloc_cb, read_cb);
    ASSERT(r == 0);
  
    buf.base = "hello\n";
    buf.len = 6;
  
    r = uv_write(&write_req, (uv_stream_t*)&tcp_peer, &buf, 1, write_cb);
    ASSERT(r == 0);
  }
  
  
  static void alloc_cb(uv_handle_t* handle,
                       size_t suggested_size,
                       uv_buf_t* buf) {
    static char slab[1024];
    buf->base = slab;
    buf->len = sizeof(slab);
  }
  
  
  static void read_cb(uv_stream_t* stream, ssize_t nread, const uv_buf_t* buf) {
    if (nread < 0) {
      fprintf(stderr, "read_cb error: %s\n", uv_err_name(nread));
      ASSERT(nread == UV_ECONNRESET || nread == UV_EOF);
  
      uv_close((uv_handle_t*)&tcp_server, NULL);
      uv_close((uv_handle_t*)&tcp_peer, NULL);
    }
  
    read_cb_called++;
  }
  
  
  static void connect_cb(uv_connect_t* req, int status) {
    ASSERT(req == &connect_req);
    ASSERT(status == 0);
  
    /* Close the client. */
    uv_close((uv_handle_t*)&tcp_client, NULL);
  }
  
  
  static void write_cb(uv_write_t* req, int status) {
    ASSERT(status == 0);
    write_cb_called++;
  }
  
  
  TEST_IMPL(tcp_write_to_half_open_connection) {
    struct sockaddr_in addr;
    uv_loop_t* loop;
    int r;
  
    ASSERT(0 == uv_ip4_addr("127.0.0.1", TEST_PORT, &addr));
  
    loop = uv_default_loop();
    ASSERT(loop != NULL);
  
    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, 1, connection_cb);
    ASSERT(r == 0);
  
    r = uv_tcp_init(loop, &tcp_client);
    ASSERT(r == 0);
  
    r = uv_tcp_connect(&connect_req,
                       &tcp_client,
                       (const struct sockaddr*) &addr,
                       connect_cb);
    ASSERT(r == 0);
  
    r = uv_run(loop, UV_RUN_DEFAULT);
    ASSERT(r == 0);
  
    ASSERT(write_cb_called > 0);
    ASSERT(read_cb_called > 0);
  
    MAKE_VALGRIND_HAPPY();
    return 0;
  }
  