1 /* Copyright The libuv project and 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 #include <string.h> 28 29 #define CHECK_OBJECT(handle, type, parent) \ 30 ASSERT((type*)(handle) == &(parent)) 31 32 static uv_udp_t client; 33 static uv_idle_t idle_handle; 34 static uv_udp_send_t send_req; 35 static uv_buf_t buf; 36 static struct sockaddr_in addr; 37 static char send_data[1024]; 38 39 static int loop_hang_called; 40 41 static void send_cb(uv_udp_send_t* req, int status); 42 43 44 static void idle_cb(uv_idle_t* handle) { 45 int r; 46 47 ASSERT_NULL(send_req.handle); 48 CHECK_OBJECT(handle, uv_idle_t, idle_handle); 49 ASSERT(0 == uv_idle_stop(handle)); 50 51 /* It probably would have stalled by now if it's going to stall at all. */ 52 if (++loop_hang_called > 1000) { 53 uv_close((uv_handle_t*) &client, NULL); 54 uv_close((uv_handle_t*) &idle_handle, NULL); 55 return; 56 } 57 58 r = uv_udp_send(&send_req, 59 &client, 60 &buf, 61 1, 62 (const struct sockaddr*) &addr, 63 send_cb); 64 ASSERT(r == 0); 65 } 66 67 68 static void send_cb(uv_udp_send_t* req, int status) { 69 ASSERT_NOT_NULL(req); 70 ASSERT(status == 0 || status == UV_ENETUNREACH); 71 CHECK_OBJECT(req->handle, uv_udp_t, client); 72 CHECK_OBJECT(req, uv_udp_send_t, send_req); 73 req->handle = NULL; 74 75 ASSERT(0 == uv_idle_start(&idle_handle, idle_cb)); 76 } 77 78 79 TEST_IMPL(udp_send_hang_loop) { 80 ASSERT(0 == uv_idle_init(uv_default_loop(), &idle_handle)); 81 82 /* 192.0.2.0/8 is "TEST-NET" and reserved for documentation. 83 * Good for us, though. Since we want to have something unreachable. 84 */ 85 ASSERT(0 == uv_ip4_addr("192.0.2.3", TEST_PORT, &addr)); 86 87 ASSERT(0 == uv_udp_init(uv_default_loop(), &client)); 88 89 buf = uv_buf_init(send_data, sizeof(send_data)); 90 91 ASSERT(0 == uv_idle_start(&idle_handle, idle_cb)); 92 93 uv_run(uv_default_loop(), UV_RUN_DEFAULT); 94 95 ASSERT(loop_hang_called > 1000); 96 97 MAKE_VALGRIND_HAPPY(); 98 return 0; 99 } 100