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 27 #include <sys/types.h> 28 #include <sys/module.h> 29 #include <sys/socket.h> 30 31 #include <netinet/in.h> 32 33 #include <err.h> 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 #define ACCF_NAME "dataready" 42 43 /* 44 * A number of small tests to confirm that attaching ACCF_DATA accept filters 45 * to inet4 ports works as expected. We test: 46 * 47 * - That no accept filter is attached on a newly created socket. 48 * - That bind() has no affect on the accept filter state. 49 * - That we can't attach an accept filter to a socket that isn't in the 50 * listen state. 51 * - That after we fail to attach the filter, querying the kernel shows no 52 * filter attached. 53 * - That we can attach an accept filter to a socket that is in the listen 54 * state. 55 * - That once an accept filter is attached, we can query to make sure it is 56 * attached. 57 * - That once an accept filter is attached, we can remove it and query to 58 * make sure it is removed. 59 */ 60 int 61 main(void) 62 { 63 struct accept_filter_arg afa; 64 struct sockaddr_in sin; 65 struct linger linger; 66 socklen_t len; 67 int lso, so, i, ret; 68 69 /* XXX: PLAIN_TEST_REQUIRE_MODULE "backport" for stable/9 */ 70 const char *_mod_name = "accf_data"; 71 72 if (modfind(_mod_name) == -1) { 73 printf("1..0 # SKIP - module %s could not be resolved: %s\n", 74 _mod_name, strerror(errno)); 75 _exit(0); 76 } 77 /* XXX: PLAIN_TEST_REQUIRE_MODULE for stable/9 */ 78 79 printf("1..12\n"); 80 81 /* 82 * Step 0. Open socket(). 83 */ 84 lso = socket(PF_INET, SOCK_STREAM, 0); 85 if (lso == -1) 86 errx(-1, "not ok 1 - socket: %s", strerror(errno)); 87 printf("ok 1 - socket\n"); 88 89 /* 90 * Step 1. After socket(). Should return EINVAL, since no accept 91 * filter should be attached. 92 */ 93 bzero(&afa, sizeof(afa)); 94 len = sizeof(afa); 95 ret = getsockopt(lso, SOL_SOCKET, SO_ACCEPTFILTER, &afa, &len); 96 if (ret != -1) 97 errx(-1, "not ok 2 - getsockopt() after socket() succeeded"); 98 if (errno != EINVAL) 99 errx(-1, "not ok 2 - getsockopt() after socket() failed with " 100 "%d (%s)", errno, strerror(errno)); 101 printf("ok 2 - getsockopt\n"); 102 103 /* 104 * Step 2. Bind(). Ideally this will succeed. 105 */ 106 setsockopt(lso, SOL_SOCKET, SO_REUSEADDR, &lso, sizeof(lso)); 107 bzero(&sin, sizeof(sin)); 108 sin.sin_len = sizeof(sin); 109 sin.sin_family = AF_INET; 110 sin.sin_port = htons(8080); 111 sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK); 112 if (bind(lso, (struct sockaddr *)&sin, sizeof(sin)) < 0) 113 errx(-1, "not ok 3 - bind %s", strerror(errno)); 114 printf("ok 3 - bind\n"); 115 116 /* 117 * Step 3: After bind(). getsockopt() should return EINVAL, since no 118 * accept filter should be attached. 119 */ 120 len = sizeof(afa); 121 ret = getsockopt(lso, SOL_SOCKET, SO_ACCEPTFILTER, &afa, &len); 122 if (ret != -1) 123 errx(-1, "not ok 4 - getsockopt() after bind() succeeded"); 124 if (errno != EINVAL) 125 errx(-1, "not ok 4 - getsockopt() after bind() failed with %d (%s)", 126 errno, strerror(errno)); 127 printf("ok 4 - getsockopt\n"); 128 129 /* 130 * Step 4: Setsockopt() before listen(). Should fail, since it's not 131 * yet a listen() socket. 132 */ 133 bzero(&afa, sizeof(afa)); 134 strncpy(afa.af_name, ACCF_NAME, sizeof(afa.af_name)); 135 ret = setsockopt(lso, SOL_SOCKET, SO_ACCEPTFILTER, &afa, sizeof(afa)); 136 if (ret == 0) 137 errx(-1, "not ok 5 - setsockopt() before listen() succeeded"); 138 printf("ok 5 - setsockopt\n"); 139 140 /* 141 * Step 5: Getsockopt() after pre-listen() setsockopt(). Should 142 * fail with EINVAL, since setsockopt() should have failed. 143 */ 144 len = sizeof(afa); 145 ret = getsockopt(lso, SOL_SOCKET, SO_ACCEPTFILTER, &afa, &len); 146 if (ret == 0) 147 errx(-1, "not ok 6 - getsockopt() after pre-listen() setsockopt() " 148 "succeeded"); 149 if (errno != EINVAL) 150 errx(-1, "not ok 6 - pre-listen() getsockopt() failed with %d (%s)", 151 errno, strerror(errno)); 152 printf("ok 6 - getsockopt\n"); 153 154 /* 155 * Step 6: listen(). 156 */ 157 if (listen(lso, -1) < 0) 158 errx(-1, "not ok 7 - listen: %s", strerror(errno)); 159 printf("ok 7 - listen\n"); 160 161 /* 162 * Step 7: Getsockopt() after listen(). Should fail with EINVAL, 163 * since we have not installed accept filter yet. 164 */ 165 len = sizeof(afa); 166 ret = getsockopt(lso, SOL_SOCKET, SO_ACCEPTFILTER, &afa, &len); 167 if (ret == 0) 168 errx(-1, "not ok 8 - getsockopt() after listen() but before " 169 "setsockopt() succeeded"); 170 if (errno != EINVAL) 171 errx(-1, "not ok 8 - getsockopt() after listen() but before " 172 "setsockopt() failed with %d (%s)", errno, strerror(errno)); 173 printf("ok 8 - getsockopt\n"); 174 175 /* 176 * Step 8: After listen(). This call to setsockopt() should succeed. 177 */ 178 bzero(&afa, sizeof(afa)); 179 strncpy(afa.af_name, ACCF_NAME, sizeof(afa.af_name)); 180 ret = setsockopt(lso, SOL_SOCKET, SO_ACCEPTFILTER, &afa, sizeof(afa)); 181 if (ret != 0) 182 errx(-1, "not ok 9 - setsockopt() after listen() failed with %d " 183 "(%s)", errno, strerror(errno)); 184 printf("ok 9 - setsockopt\n"); 185 186 /* 187 * Step 9: After setsockopt(). Should succeed and identify 188 * ACCF_NAME. 189 */ 190 bzero(&afa, sizeof(afa)); 191 len = sizeof(afa); 192 ret = getsockopt(lso, SOL_SOCKET, SO_ACCEPTFILTER, &afa, &len); 193 if (ret != 0) 194 errx(-1, "not ok 10 - getsockopt() after listen() setsockopt() " 195 "failed with %d (%s)", errno, strerror(errno)); 196 if (len != sizeof(afa)) 197 errx(-1, "not ok 10 - getsockopt() after setsockopet() after " 198 "listen() returned wrong size (got %d expected %zd)", len, 199 sizeof(afa)); 200 if (strcmp(afa.af_name, ACCF_NAME) != 0) 201 errx(-1, "not ok 10 - getsockopt() after setsockopt() after " 202 "listen() mismatch (got %s expected %s)", afa.af_name, 203 ACCF_NAME); 204 printf("ok 10 - getsockopt\n"); 205 206 /* 207 * Step 10: Set listening socket to non blocking mode. Open 208 * connection to our listening socket and try to accept. Should 209 * no succeed. Write a byte of data and try again. Should accept. 210 */ 211 i = fcntl(lso, F_GETFL); 212 if (i < 0) 213 errx(-1, "not ok 11 - ioctl(F_GETFL): %s", strerror(errno)); 214 i |= O_NONBLOCK; 215 if (fcntl(lso, F_SETFL, i) != 0) 216 errx(-1, "not ok 11 - ioctl(F_SETFL): %s", strerror(errno)); 217 so = socket(PF_INET, SOCK_STREAM, 0); 218 if (so == -1) 219 errx(-1, "not ok 11 - socket: %s", strerror(errno)); 220 if (connect(so, (struct sockaddr *)&sin, sizeof(sin)) < 0) 221 errx(-1, "not ok 11 - connect %s", strerror(errno)); 222 if (accept(lso, NULL, 0) != -1 && errno != EWOULDBLOCK) 223 errx(-1, "not ok 11 - accept #1 %s", strerror(errno)); 224 if (write(so, "0", 1) != 1) 225 errx(-1, "not ok 11 - write %s", strerror(errno)); 226 /* 227 * XXXGL: ugly, but we need to make sure that our write reaches 228 * remote side of the socket. 229 */ 230 usleep(10000); 231 if (accept(lso, NULL, 0) < 1) 232 errx(-1, "not ok 11 - accept #2 %s", strerror(errno)); 233 if (close(so) != 0) 234 errx(-1, "not ok 11 - close(): %s", strerror(errno)); 235 printf("ok 11 - accept\n"); 236 237 /* 238 * Step 12: reset connection before accept filter allows it. 239 * In this case the connection must make it to the listen 240 * queue, but with ECONNABORTED code. 241 */ 242 so = socket(PF_INET, SOCK_STREAM, 0); 243 if (so == -1) 244 errx(-1, "not ok 12 - socket: %s", strerror(errno)); 245 if (connect(so, (struct sockaddr *)&sin, sizeof(sin)) < 0) 246 errx(-1, "not ok 12 - connect %s", strerror(errno)); 247 linger.l_onoff = 1; 248 linger.l_linger = 0; 249 ret = setsockopt(so, SOL_SOCKET, SO_LINGER, &linger, sizeof(linger)); 250 if (ret != 0) 251 errx(-1, "not ok 12 - setsockopt(SO_LINGER) failed with %d " 252 "(%s)", errno, strerror(errno)); 253 if (close(so) != 0) 254 errx(-1, "not ok 12 - close(): %s", strerror(errno)); 255 if (accept(lso, NULL, 0) != -1 && errno != ECONNABORTED) 256 errx(-1, "not ok 12 - accept #3 %s", strerror(errno)); 257 printf("ok 12 - accept\n"); 258 259 #if 1 260 /* 261 * XXXGL: this doesn't belong to the test itself, but is known 262 * to examine rarely examined paths in the kernel. Intentionally 263 * leave a socket on the incomplete queue, before the program 264 * exits. 265 */ 266 so = socket(PF_INET, SOCK_STREAM, 0); 267 if (so == -1) 268 errx(-1, "not ok 13 - socket: %s", strerror(errno)); 269 if (connect(so, (struct sockaddr *)&sin, sizeof(sin)) < 0) 270 errx(-1, "not ok 13 - connect %s", strerror(errno)); 271 #endif 272 273 /* 274 * Step 12: Remove accept filter. After removing the accept filter 275 * getsockopt() should fail with EINVAL. 276 */ 277 ret = setsockopt(lso, SOL_SOCKET, SO_ACCEPTFILTER, NULL, 0); 278 if (ret != 0) 279 errx(-1, "not ok 13 - setsockopt() after listen() " 280 "failed with %d (%s)", errno, strerror(errno)); 281 bzero(&afa, sizeof(afa)); 282 len = sizeof(afa); 283 ret = getsockopt(lso, SOL_SOCKET, SO_ACCEPTFILTER, &afa, &len); 284 if (ret == 0) 285 errx(-1, "not ok 13 - getsockopt() after removing " 286 "the accept filter returns valid accept filter %s", 287 afa.af_name); 288 if (errno != EINVAL) 289 errx(-1, "not ok 13 - getsockopt() after removing the accept" 290 "filter failed with %d (%s)", errno, strerror(errno)); 291 if (close(lso) != 0) 292 errx(-1, "not ok 13 - close() of listening socket: %s", 293 strerror(errno)); 294 printf("ok 13 - setsockopt\n"); 295 296 return (0); 297 } 298