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 #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 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 ASSERT(suggested_size <= sizeof(slab)); 50 buf->base = slab; 51 buf->len = sizeof(slab); 52 } 53 54 55 static void close_cb(uv_handle_t* handle) { 56 CHECK_HANDLE(handle); 57 ASSERT(1 == uv_is_closing(handle)); 58 close_cb_called++; 59 } 60 61 62 static void cl_recv_cb(uv_udp_t* handle, 63 ssize_t nread, 64 const uv_buf_t* buf, 65 const struct sockaddr* addr, 66 unsigned flags) { 67 CHECK_HANDLE(handle); 68 ASSERT(flags == 0); 69 70 if (nread < 0) { 71 ASSERT(0 && "unexpected error"); 72 } 73 74 if (nread == 0) { 75 /* Returning unused buffer. Don't count towards cl_recv_cb_called */ 76 ASSERT_NULL(addr); 77 return; 78 } 79 80 ASSERT_NOT_NULL(addr); 81 ASSERT(nread == 4); 82 ASSERT(!memcmp("PONG", buf->base, nread)); 83 84 cl_recv_cb_called++; 85 86 uv_close((uv_handle_t*) handle, close_cb); 87 } 88 89 90 static void cl_send_cb(uv_udp_send_t* req, int status) { 91 int r; 92 93 ASSERT_NOT_NULL(req); 94 ASSERT(status == 0); 95 CHECK_HANDLE(req->handle); 96 97 r = uv_udp_recv_start(req->handle, alloc_cb, cl_recv_cb); 98 ASSERT(r == 0); 99 100 cl_send_cb_called++; 101 } 102 103 104 static void sv_send_cb(uv_udp_send_t* req, int status) { 105 ASSERT_NOT_NULL(req); 106 ASSERT(status == 0); 107 CHECK_HANDLE(req->handle); 108 109 uv_close((uv_handle_t*) req->handle, close_cb); 110 free(req); 111 112 sv_send_cb_called++; 113 } 114 115 116 static void sv_recv_cb(uv_udp_t* handle, 117 ssize_t nread, 118 const uv_buf_t* rcvbuf, 119 const struct sockaddr* addr, 120 unsigned flags) { 121 uv_udp_send_t* req; 122 uv_buf_t sndbuf; 123 int r; 124 125 if (nread < 0) { 126 ASSERT(0 && "unexpected error"); 127 } 128 129 if (nread == 0) { 130 /* Returning unused buffer. Don't count towards sv_recv_cb_called */ 131 ASSERT_NULL(addr); 132 return; 133 } 134 135 CHECK_HANDLE(handle); 136 ASSERT(flags == 0); 137 138 ASSERT_NOT_NULL(addr); 139 ASSERT(nread == 4); 140 ASSERT(!memcmp("PING", rcvbuf->base, nread)); 141 142 /* FIXME? `uv_udp_recv_stop` does what it says: recv_cb is not called 143 * anymore. That's problematic because the read buffer won't be returned 144 * either... Not sure I like that but it's consistent with `uv_read_stop`. 145 */ 146 r = uv_udp_recv_stop(handle); 147 ASSERT(r == 0); 148 149 req = malloc(sizeof *req); 150 ASSERT_NOT_NULL(req); 151 152 sndbuf = uv_buf_init("PONG", 4); 153 r = uv_udp_send(req, handle, &sndbuf, 1, addr, sv_send_cb); 154 ASSERT(r == 0); 155 156 sv_recv_cb_called++; 157 } 158 159 160 TEST_IMPL(udp_send_and_recv) { 161 struct sockaddr_in addr; 162 uv_udp_send_t req; 163 uv_buf_t buf; 164 int r; 165 166 ASSERT(0 == uv_ip4_addr("0.0.0.0", TEST_PORT, &addr)); 167 168 r = uv_udp_init(uv_default_loop(), &server); 169 ASSERT(r == 0); 170 171 r = uv_udp_bind(&server, (const struct sockaddr*) &addr, 0); 172 ASSERT(r == 0); 173 174 r = uv_udp_recv_start(&server, alloc_cb, sv_recv_cb); 175 ASSERT(r == 0); 176 177 ASSERT(0 == uv_ip4_addr("127.0.0.1", TEST_PORT, &addr)); 178 179 r = uv_udp_init(uv_default_loop(), &client); 180 ASSERT(r == 0); 181 182 /* client sends "PING", expects "PONG" */ 183 buf = uv_buf_init("PING", 4); 184 185 r = uv_udp_send(&req, 186 &client, 187 &buf, 188 1, 189 (const struct sockaddr*) &addr, 190 cl_send_cb); 191 ASSERT(r == 0); 192 193 ASSERT(close_cb_called == 0); 194 ASSERT(cl_send_cb_called == 0); 195 ASSERT(cl_recv_cb_called == 0); 196 ASSERT(sv_send_cb_called == 0); 197 ASSERT(sv_recv_cb_called == 0); 198 199 uv_run(uv_default_loop(), UV_RUN_DEFAULT); 200 201 ASSERT(cl_send_cb_called == 1); 202 ASSERT(cl_recv_cb_called == 1); 203 ASSERT(sv_send_cb_called == 1); 204 ASSERT(sv_recv_cb_called == 1); 205 ASSERT(close_cb_called == 2); 206 207 ASSERT(client.send_queue_size == 0); 208 ASSERT(server.send_queue_size == 0); 209 210 MAKE_VALGRIND_HAPPY(); 211 return 0; 212 } 213