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blackhole-server.c revision 1.1.1.2.4.2 
      1 /* Copyright Joyent, Inc. and other Node contributors. All rights reserved.
      2  *
      3  * Permission is hereby granted, free of charge, to any person obtaining a copy
      4  * of this software and associated documentation files (the "Software"), to
      5  * deal in the Software without restriction, including without limitation the
      6  * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
      7  * sell copies of the Software, and to permit persons to whom the Software is
      8  * furnished to do so, subject to the following conditions:
      9  *
     10  * The above copyright notice and this permission notice shall be included in
     11  * all copies or substantial portions of the Software.
     12  *
     13  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     14  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     15  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
     16  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
     17  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
     18  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
     19  * IN THE SOFTWARE.
     20  */
     21 
     22 #include "uv.h"
     23 #include "task.h"
     24 
     25 #include <stdio.h>
     26 #include <stdlib.h>
     27 
     28 typedef struct {
     29   uv_tcp_t handle;
     30   uv_shutdown_t shutdown_req;
     31 } conn_rec;
     32 
     33 static uv_tcp_t tcp_server;
     34 
     35 static void connection_cb(uv_stream_t* stream, int status);
     36 static void alloc_cb(uv_handle_t* handle, size_t suggested_size, uv_buf_t* buf);
     37 static void read_cb(uv_stream_t* stream, ssize_t nread, const uv_buf_t* buf);
     38 static void shutdown_cb(uv_shutdown_t* req, int status);
     39 static void close_cb(uv_handle_t* handle);
     40 
     41 
     42 static void connection_cb(uv_stream_t* stream, int status) {
     43   conn_rec* conn;
     44   int r;
     45 
     46   ASSERT(status == 0);
     47   ASSERT(stream == (uv_stream_t*)&tcp_server);
     48 
     49   conn = malloc(sizeof *conn);
     50   ASSERT_NOT_NULL(conn);
     51 
     52   r = uv_tcp_init(stream->loop, &conn->handle);
     53   ASSERT(r == 0);
     54 
     55   r = uv_accept(stream, (uv_stream_t*)&conn->handle);
     56   ASSERT(r == 0);
     57 
     58   r = uv_read_start((uv_stream_t*)&conn->handle, alloc_cb, read_cb);
     59   ASSERT(r == 0);
     60 }
     61 
     62 
     63 static void alloc_cb(uv_handle_t* handle,
     64                      size_t suggested_size,
     65                      uv_buf_t* buf) {
     66   static char slab[65536];
     67   buf->base = slab;
     68   buf->len = sizeof(slab);
     69 }
     70 
     71 
     72 static void read_cb(uv_stream_t* stream, ssize_t nread, const uv_buf_t* buf) {
     73   conn_rec* conn;
     74   int r;
     75 
     76   if (nread >= 0)
     77     return;
     78 
     79   ASSERT(nread == UV_EOF);
     80 
     81   conn = container_of(stream, conn_rec, handle);
     82 
     83   r = uv_shutdown(&conn->shutdown_req, stream, shutdown_cb);
     84   ASSERT(r == 0);
     85 }
     86 
     87 
     88 static void shutdown_cb(uv_shutdown_t* req, int status) {
     89   conn_rec* conn = container_of(req, conn_rec, shutdown_req);
     90   uv_close((uv_handle_t*)&conn->handle, close_cb);
     91 }
     92 
     93 
     94 static void close_cb(uv_handle_t* handle) {
     95   conn_rec* conn = container_of(handle, conn_rec, handle);
     96   free(conn);
     97 }
     98 
     99 
    100 HELPER_IMPL(tcp4_blackhole_server) {
    101   struct sockaddr_in addr;
    102   uv_loop_t* loop;
    103   int r;
    104 
    105   loop = uv_default_loop();
    106   ASSERT(0 == uv_ip4_addr("127.0.0.1", TEST_PORT, &addr));
    107 
    108   r = uv_tcp_init(loop, &tcp_server);
    109   ASSERT(r == 0);
    110 
    111   r = uv_tcp_bind(&tcp_server, (const struct sockaddr*) &addr, 0);
    112   ASSERT(r == 0);
    113 
    114   r = uv_listen((uv_stream_t*)&tcp_server, 128, connection_cb);
    115   ASSERT(r == 0);
    116 
    117   notify_parent_process();
    118   r = uv_run(loop, UV_RUN_DEFAULT);
    119   ASSERT(0 && "Blackhole server dropped out of event loop.");
    120 
    121   return 0;
    122 }
    123