1 /*- 2 * Copyright (c) 2004 Robert N. M. Watson 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD$ 27 */ 28 29 #include <sys/types.h> 30 #include <sys/event.h> 31 #include <sys/socket.h> 32 #include <sys/time.h> 33 34 #include <errno.h> 35 #include <fcntl.h> 36 #include <stdio.h> 37 #include <stdlib.h> 38 #include <string.h> 39 #include <unistd.h> 40 41 static int curtest = 1; 42 43 /*- 44 * This test uses UNIX domain socket pairs to perform some basic exercising 45 * of kqueue functionality on sockets. In particular, testing that for read 46 * and write filters, we see the correct detection of whether reads and 47 * writes should actually be able to occur. 48 * 49 * TODO: 50 * - Test read/write filters for listen/accept sockets. 51 * - Handle the XXXRW below regarding datagram sockets. 52 * - Test that watermark/buffer size "data" fields returned by kqueue are 53 * correct. 54 * - Check that kqueue does something sensible when the remote endpoing is 55 * closed. 56 */ 57 58 #define OK(testname) printf("ok %d - %s\n", curtest, testname); \ 59 curtest++; 60 61 static void 62 fail(int error, const char *func, const char *socktype, const char *rest) 63 { 64 65 printf("not ok %d\n", curtest); 66 67 if (socktype == NULL) 68 printf("# %s(): %s\n", func, strerror(error)); 69 else if (rest == NULL) 70 printf("# %s(%s): %s\n", func, socktype, 71 strerror(error)); 72 else 73 printf("# %s(%s, %s): %s\n", func, socktype, rest, 74 strerror(error)); 75 exit(-1); 76 } 77 78 static void 79 fail_assertion(const char *func, const char *socktype, const char *rest, 80 const char *assertion) 81 { 82 83 printf("not ok %d - %s\n", curtest, assertion); 84 85 if (socktype == NULL) 86 printf("# %s(): assertion %s failed\n", func, 87 assertion); 88 else if (rest == NULL) 89 printf("# %s(%s): assertion %s failed\n", func, 90 socktype, assertion); 91 else 92 printf("# %s(%s, %s): assertion %s failed\n", func, 93 socktype, rest, assertion); 94 exit(-1); 95 } 96 97 /* 98 * Test read kevent on a socket pair: check to make sure endpoint 0 isn't 99 * readable when we start, then write to endpoint 1 and confirm that endpoint 100 * 0 is now readable. Drain the write, then check that it's not readable 101 * again. Use non-blocking kqueue operations and socket operations. 102 */ 103 static void 104 test_evfilt_read(int kq, int fd[2], const char *socktype) 105 { 106 struct timespec ts; 107 struct kevent ke; 108 ssize_t len; 109 char ch; 110 int i; 111 112 EV_SET(&ke, fd[0], EVFILT_READ, EV_ADD, 0, 0, NULL); 113 if (kevent(kq, &ke, 1, NULL, 0, NULL) == -1) 114 fail(errno, "kevent", socktype, "EVFILT_READ, EV_ADD"); 115 OK("EVFILT_READ, EV_ADD"); 116 117 /* 118 * Confirm not readable to begin with, no I/O yet. 119 */ 120 ts.tv_sec = 0; 121 ts.tv_nsec = 0; 122 i = kevent(kq, NULL, 0, &ke, 1, &ts); 123 if (i == -1) 124 fail(errno, "kevent", socktype, "EVFILT_READ"); 125 OK("EVFILT_READ"); 126 if (i != 0) 127 fail_assertion("kevent", socktype, "EVFILT_READ", 128 "empty socket unreadable"); 129 OK("empty socket unreadable"); 130 131 /* 132 * Write a byte to one end. 133 */ 134 ch = 'a'; 135 len = write(fd[1], &ch, sizeof(ch)); 136 if (len == -1) 137 fail(errno, "write", socktype, NULL); 138 OK("write one byte"); 139 if (len != sizeof(ch)) 140 fail_assertion("write", socktype, NULL, "write length"); 141 OK("write one byte length"); 142 143 /* 144 * Other end should now be readable. 145 */ 146 ts.tv_sec = 0; 147 ts.tv_nsec = 0; 148 i = kevent(kq, NULL, 0, &ke, 1, &ts); 149 if (i == -1) 150 fail(errno, "kevent", socktype, "EVFILT_READ"); 151 OK("EVFILT_READ"); 152 if (i != 1) 153 fail_assertion("kevent", socktype, "EVFILT_READ", 154 "non-empty socket unreadable"); 155 OK("non-empty socket unreadable"); 156 157 /* 158 * Read a byte to clear the readable state. 159 */ 160 len = read(fd[0], &ch, sizeof(ch)); 161 if (len == -1) 162 fail(errno, "read", socktype, NULL); 163 OK("read one byte"); 164 if (len != sizeof(ch)) 165 fail_assertion("read", socktype, NULL, "read length"); 166 OK("read one byte length"); 167 168 /* 169 * Now re-check for readability. 170 */ 171 ts.tv_sec = 0; 172 ts.tv_nsec = 0; 173 i = kevent(kq, NULL, 0, &ke, 1, &ts); 174 if (i == -1) 175 fail(errno, "kevent", socktype, "EVFILT_READ"); 176 OK("EVFILT_READ"); 177 if (i != 0) 178 fail_assertion("kevent", socktype, "EVFILT_READ", 179 "empty socket unreadable"); 180 OK("empty socket unreadable"); 181 182 EV_SET(&ke, fd[0], EVFILT_READ, EV_DELETE, 0, 0, NULL); 183 if (kevent(kq, &ke, 1, NULL, 0, NULL) == -1) 184 fail(errno, "kevent", socktype, "EVFILT_READ, EV_DELETE"); 185 OK("EVFILT_READ, EV_DELETE"); 186 } 187 188 static void 189 test_evfilt_write(int kq, int fd[2], const char *socktype) 190 { 191 struct timespec ts; 192 struct kevent ke; 193 ssize_t len; 194 char ch; 195 int i; 196 197 EV_SET(&ke, fd[0], EVFILT_WRITE, EV_ADD, 0, 0, NULL); 198 if (kevent(kq, &ke, 1, NULL, 0, NULL) == -1) 199 fail(errno, "kevent", socktype, "EVFILT_WRITE, EV_ADD"); 200 OK("EVFILE_WRITE, EV_ADD"); 201 202 /* 203 * Confirm writable to begin with, no I/O yet. 204 */ 205 ts.tv_sec = 0; 206 ts.tv_nsec = 0; 207 i = kevent(kq, NULL, 0, &ke, 1, &ts); 208 if (i == -1) 209 fail(errno, "kevent", socktype, "EVFILT_WRITE"); 210 OK("EVFILE_WRITE"); 211 if (i != 1) 212 fail_assertion("kevent", socktype, "EVFILT_WRITE", 213 "empty socket unwritable"); 214 OK("empty socket unwritable"); 215 216 /* 217 * Write bytes into the socket until we can't write anymore. 218 */ 219 ch = 'a'; 220 while ((len = write(fd[0], &ch, sizeof(ch))) == sizeof(ch)) {}; 221 if (len == -1 && errno != EAGAIN && errno != ENOBUFS) 222 fail(errno, "write", socktype, NULL); 223 OK("write"); 224 if (len != -1 && len != sizeof(ch)) 225 fail_assertion("write", socktype, NULL, "write length"); 226 OK("write length"); 227 228 /* 229 * Check to make sure the socket is no longer writable. 230 */ 231 ts.tv_sec = 0; 232 ts.tv_nsec = 0; 233 i = kevent(kq, NULL, 0, &ke, 1, &ts); 234 if (i == -1) 235 fail(errno, "kevent", socktype, "EVFILT_WRITE"); 236 OK("EVFILT_WRITE"); 237 if (i != 0) 238 fail_assertion("kevent", socktype, "EVFILT_WRITE", 239 "full socket writable"); 240 OK("full socket writable"); 241 242 EV_SET(&ke, fd[0], EVFILT_WRITE, EV_DELETE, 0, 0, NULL); 243 if (kevent(kq, &ke, 1, NULL, 0, NULL) == -1) 244 fail(errno, "kevent", socktype, "EVFILT_WRITE, EV_DELETE"); 245 OK("EVFILT_WRITE, EV_DELETE"); 246 } 247 248 /* 249 * Basic registration exercise for kqueue(2). Create several types/brands of 250 * sockets, and confirm that we can register for various events on them. 251 */ 252 int 253 main(void) 254 { 255 int kq, sv[2]; 256 257 printf("1..49\n"); 258 259 kq = kqueue(); 260 if (kq == -1) 261 fail(errno, "kqueue", NULL, NULL); 262 OK("kqueue()"); 263 264 /* 265 * Create a UNIX domain datagram socket, and attach/test/detach a 266 * read filter on it. 267 */ 268 if (socketpair(PF_UNIX, SOCK_DGRAM, 0, sv) == -1) 269 fail(errno, "socketpair", "PF_UNIX, SOCK_DGRAM", NULL); 270 OK("socketpair() 1"); 271 272 if (fcntl(sv[0], F_SETFL, O_NONBLOCK) != 0) 273 fail(errno, "fcntl", "PF_UNIX, SOCK_DGRAM", "O_NONBLOCK"); 274 OK("fcntl() 1"); 275 if (fcntl(sv[1], F_SETFL, O_NONBLOCK) != 0) 276 fail(errno, "fcntl", "PF_UNIX, SOCK_DGRAM", "O_NONBLOCK"); 277 OK("fnctl() 2"); 278 279 test_evfilt_read(kq, sv, "PF_UNIX, SOCK_DGRAM"); 280 281 if (close(sv[0]) == -1) 282 fail(errno, "close", "PF_UNIX/SOCK_DGRAM", "sv[0]"); 283 OK("close() 1"); 284 if (close(sv[1]) == -1) 285 fail(errno, "close", "PF_UNIX/SOCK_DGRAM", "sv[1]"); 286 OK("close() 2"); 287 288 #if 0 289 /* 290 * XXXRW: We disable the write test in the case of datagram sockets, 291 * as kqueue can't tell when the remote socket receive buffer is 292 * full, whereas the UNIX domain socket implementation can tell and 293 * returns ENOBUFS. 294 */ 295 /* 296 * Create a UNIX domain datagram socket, and attach/test/detach a 297 * write filter on it. 298 */ 299 if (socketpair(PF_UNIX, SOCK_DGRAM, 0, sv) == -1) 300 fail(errno, "socketpair", "PF_UNIX, SOCK_DGRAM", NULL); 301 302 if (fcntl(sv[0], F_SETFL, O_NONBLOCK) != 0) 303 fail(errno, "fcntl", "PF_UNIX, SOCK_DGRAM", "O_NONBLOCK"); 304 if (fcntl(sv[1], F_SETFL, O_NONBLOCK) != 0) 305 fail(errno, "fcntl", "PF_UNIX, SOCK_DGRAM", "O_NONBLOCK"); 306 307 test_evfilt_write(kq, sv, "PF_UNIX, SOCK_DGRAM"); 308 309 if (close(sv[0]) == -1) 310 fail(errno, "close", "PF_UNIX/SOCK_DGRAM", "sv[0]"); 311 if (close(sv[1]) == -1) 312 fail(errno, "close", "PF_UNIX/SOCK_DGRAM", "sv[1]"); 313 #endif 314 315 /* 316 * Create a UNIX domain stream socket, and attach/test/detach a 317 * read filter on it. 318 */ 319 if (socketpair(PF_UNIX, SOCK_STREAM, 0, sv) == -1) 320 fail(errno, "socketpair", "PF_UNIX, SOCK_STREAM", NULL); 321 OK("socketpair() 2"); 322 323 if (fcntl(sv[0], F_SETFL, O_NONBLOCK) != 0) 324 fail(errno, "fcntl", "PF_UNIX, SOCK_STREAM", "O_NONBLOCK"); 325 OK("fcntl() 3"); 326 if (fcntl(sv[1], F_SETFL, O_NONBLOCK) != 0) 327 fail(errno, "fcntl", "PF_UNIX, SOCK_STREAM", "O_NONBLOCK"); 328 OK("fcntl() 4"); 329 330 test_evfilt_read(kq, sv, "PF_UNIX, SOCK_STREAM"); 331 332 if (close(sv[0]) == -1) 333 fail(errno, "close", "PF_UNIX/SOCK_STREAM", "sv[0]"); 334 OK("close() 3"); 335 if (close(sv[1]) == -1) 336 fail(errno, "close", "PF_UNIX/SOCK_STREAM", "sv[1]"); 337 OK("close() 4"); 338 339 /* 340 * Create a UNIX domain stream socket, and attach/test/detach a 341 * write filter on it. 342 */ 343 if (socketpair(PF_UNIX, SOCK_STREAM, 0, sv) == -1) 344 fail(errno, "socketpair", "PF_UNIX, SOCK_STREAM", NULL); 345 OK("socketpair() 3"); 346 347 if (fcntl(sv[0], F_SETFL, O_NONBLOCK) != 0) 348 fail(errno, "fcntl", "PF_UNIX, SOCK_STREAM", "O_NONBLOCK"); 349 OK("fcntl() 5"); 350 if (fcntl(sv[1], F_SETFL, O_NONBLOCK) != 0) 351 fail(errno, "fcntl", "PF_UNIX, SOCK_STREAM", "O_NONBLOCK"); 352 OK("fcntl() 6"); 353 354 test_evfilt_write(kq, sv, "PF_UNIX, SOCK_STREAM"); 355 356 if (close(sv[0]) == -1) 357 fail(errno, "close", "PF_UNIX/SOCK_STREAM", "sv[0]"); 358 OK("close() 5"); 359 if (close(sv[1]) == -1) 360 fail(errno, "close", "PF_UNIX/SOCK_STREAM", "sv[1]"); 361 OK("close() 6"); 362 363 if (close(kq) == -1) 364 fail(errno, "close", "kq", NULL); 365 OK("close() 7"); 366 367 return (0); 368 } 369