1 /* Copyright libuv project 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 #include <string.h> 28 29 #define CHECK_HANDLE(handle) \ 30 ASSERT((uv_udp_t*)(handle) == &server || (uv_udp_t*)(handle) == &client) 31 32 static uv_udp_t server; 33 static uv_udp_t client; 34 35 static int cl_send_cb_called; 36 static int cl_recv_cb_called; 37 38 static int sv_send_cb_called; 39 static int sv_recv_cb_called; 40 41 static int close_cb_called; 42 43 44 static void sv_alloc_cb(uv_handle_t* handle, 45 size_t suggested_size, 46 uv_buf_t* buf) { 47 static char slab[65536]; 48 CHECK_HANDLE(handle); 49 buf->base = slab; 50 buf->len = sizeof(slab); 51 } 52 53 54 static void cl_alloc_cb(uv_handle_t* handle, 55 size_t suggested_size, 56 uv_buf_t* buf) { 57 /* Do nothing, recv_cb should be called with UV_ENOBUFS. */ 58 } 59 60 61 static void close_cb(uv_handle_t* handle) { 62 CHECK_HANDLE(handle); 63 ASSERT(1 == uv_is_closing(handle)); 64 close_cb_called++; 65 } 66 67 68 static void cl_recv_cb(uv_udp_t* handle, 69 ssize_t nread, 70 const uv_buf_t* buf, 71 const struct sockaddr* addr, 72 unsigned flags) { 73 CHECK_HANDLE(handle); 74 ASSERT(flags == 0); 75 ASSERT(nread == UV_ENOBUFS); 76 77 cl_recv_cb_called++; 78 79 uv_close((uv_handle_t*) handle, close_cb); 80 } 81 82 83 static void cl_send_cb(uv_udp_send_t* req, int status) { 84 int r; 85 86 ASSERT(req != NULL); 87 ASSERT(status == 0); 88 CHECK_HANDLE(req->handle); 89 90 r = uv_udp_recv_start(req->handle, cl_alloc_cb, cl_recv_cb); 91 ASSERT(r == 0); 92 93 cl_send_cb_called++; 94 } 95 96 97 static void sv_send_cb(uv_udp_send_t* req, int status) { 98 ASSERT(req != NULL); 99 ASSERT(status == 0); 100 CHECK_HANDLE(req->handle); 101 102 uv_close((uv_handle_t*) req->handle, close_cb); 103 free(req); 104 105 sv_send_cb_called++; 106 } 107 108 109 static void sv_recv_cb(uv_udp_t* handle, 110 ssize_t nread, 111 const uv_buf_t* rcvbuf, 112 const struct sockaddr* addr, 113 unsigned flags) { 114 uv_udp_send_t* req; 115 uv_buf_t sndbuf; 116 int r; 117 118 if (nread < 0) { 119 ASSERT(0 && "unexpected error"); 120 } 121 122 if (nread == 0) { 123 /* Returning unused buffer. Don't count towards sv_recv_cb_called */ 124 ASSERT(addr == NULL); 125 return; 126 } 127 128 CHECK_HANDLE(handle); 129 ASSERT(flags == 0); 130 131 ASSERT(addr != NULL); 132 ASSERT(nread == 4); 133 ASSERT(!memcmp("PING", rcvbuf->base, nread)); 134 135 r = uv_udp_recv_stop(handle); 136 ASSERT(r == 0); 137 138 req = malloc(sizeof *req); 139 ASSERT(req != NULL); 140 141 sndbuf = uv_buf_init("PONG", 4); 142 r = uv_udp_send(req, handle, &sndbuf, 1, addr, sv_send_cb); 143 ASSERT(r == 0); 144 145 sv_recv_cb_called++; 146 } 147 148 149 TEST_IMPL(udp_alloc_cb_fail) { 150 struct sockaddr_in addr; 151 uv_udp_send_t req; 152 uv_buf_t buf; 153 int r; 154 155 ASSERT(0 == uv_ip4_addr("0.0.0.0", TEST_PORT, &addr)); 156 157 r = uv_udp_init(uv_default_loop(), &server); 158 ASSERT(r == 0); 159 160 r = uv_udp_bind(&server, (const struct sockaddr*) &addr, 0); 161 ASSERT(r == 0); 162 163 r = uv_udp_recv_start(&server, sv_alloc_cb, sv_recv_cb); 164 ASSERT(r == 0); 165 166 ASSERT(0 == uv_ip4_addr("127.0.0.1", TEST_PORT, &addr)); 167 168 r = uv_udp_init(uv_default_loop(), &client); 169 ASSERT(r == 0); 170 171 buf = uv_buf_init("PING", 4); 172 r = uv_udp_send(&req, 173 &client, 174 &buf, 175 1, 176 (const struct sockaddr*) &addr, 177 cl_send_cb); 178 ASSERT(r == 0); 179 180 ASSERT(close_cb_called == 0); 181 ASSERT(cl_send_cb_called == 0); 182 ASSERT(cl_recv_cb_called == 0); 183 ASSERT(sv_send_cb_called == 0); 184 ASSERT(sv_recv_cb_called == 0); 185 186 uv_run(uv_default_loop(), UV_RUN_DEFAULT); 187 188 ASSERT(cl_send_cb_called == 1); 189 ASSERT(cl_recv_cb_called == 1); 190 ASSERT(sv_send_cb_called == 1); 191 ASSERT(sv_recv_cb_called == 1); 192 ASSERT(close_cb_called == 2); 193 194 MAKE_VALGRIND_HAPPY(); 195 return 0; 196 } 197