1 /*- 2 * Copyright (c) 2005 Robert N. M. Watson 3 * Copyright (c) 2015 Mark Johnston 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 #include <sys/cdefs.h> 29 __FBSDID("$FreeBSD$"); 30 31 #include <sys/types.h> 32 #include <sys/socket.h> 33 #include <sys/stat.h> 34 #include <sys/sysctl.h> 35 #include <sys/un.h> 36 37 #include <errno.h> 38 #include <fcntl.h> 39 #include <limits.h> 40 #include <stdio.h> 41 #include <stdlib.h> 42 #include <string.h> 43 #include <unistd.h> 44 45 #include <atf-c.h> 46 47 /* 48 * UNIX domain sockets allow file descriptors to be passed via "ancillary 49 * data", or control messages. This regression test is intended to exercise 50 * this facility, both performing some basic tests that it operates, and also 51 * causing some kernel edge cases to execute, such as garbage collection when 52 * there are cyclic file descriptor references. Right now we test only with 53 * stream sockets, but ideally we'd also test with datagram sockets. 54 */ 55 56 static void 57 domainsocketpair(int *fdp) 58 { 59 60 ATF_REQUIRE_MSG(socketpair(PF_UNIX, SOCK_STREAM, 0, fdp) != -1, 61 "socketpair(PF_UNIX, SOCK_STREAM) failed: %s", strerror(errno)); 62 } 63 64 static void 65 closesocketpair(int *fdp) 66 { 67 68 close(fdp[0]); 69 close(fdp[1]); 70 } 71 72 static void 73 devnull(int *fdp) 74 { 75 int fd; 76 77 fd = open("/dev/null", O_RDONLY); 78 ATF_REQUIRE_MSG(fd != -1, "open failed: %s", strerror(errno)); 79 *fdp = fd; 80 } 81 82 static void 83 tempfile(int *fdp) 84 { 85 char path[PATH_MAX]; 86 int fd; 87 88 snprintf(path, PATH_MAX, "%s/unix_passfd.XXXXXXXXXXXXXXX", 89 getenv("TMPDIR") == NULL ? "/tmp" : getenv("TMPDIR")); 90 fd = mkstemp(path); 91 ATF_REQUIRE_MSG(fd != -1, "mkstemp(%s) failed", path); 92 (void)unlink(path); 93 *fdp = fd; 94 } 95 96 static void 97 dofstat(int fd, struct stat *sb) 98 { 99 100 ATF_REQUIRE_MSG(fstat(fd, sb) == 0, 101 "fstat failed: %s", strerror(errno)); 102 } 103 104 static int 105 getnfds(void) 106 { 107 size_t len; 108 int mib[4], n, rc; 109 110 len = sizeof(n); 111 mib[0] = CTL_KERN; 112 mib[1] = KERN_PROC; 113 mib[2] = KERN_PROC_NFDS; 114 mib[3] = 0; 115 116 rc = sysctl(mib, 4, &n, &len, NULL, 0); 117 ATF_REQUIRE_MSG(rc != -1, "sysctl(KERN_PROC_NFDS) failed"); 118 return (n); 119 } 120 121 static void 122 putfds(char *buf, int fd, int nfds) 123 { 124 struct cmsghdr *cm; 125 int *fdp, i; 126 127 cm = (struct cmsghdr *)buf; 128 cm->cmsg_len = CMSG_LEN(nfds * sizeof(int)); 129 cm->cmsg_level = SOL_SOCKET; 130 cm->cmsg_type = SCM_RIGHTS; 131 for (fdp = (int *)CMSG_DATA(cm), i = 0; i < nfds; i++) 132 *fdp++ = fd; 133 } 134 135 static void 136 samefile(struct stat *sb1, struct stat *sb2) 137 { 138 139 ATF_REQUIRE_MSG(sb1->st_dev == sb2->st_dev, "different device"); 140 ATF_REQUIRE_MSG(sb1->st_ino == sb2->st_ino, "different inode"); 141 } 142 143 static size_t 144 sendfd_payload(int sockfd, int send_fd, void *payload, size_t paylen) 145 { 146 struct iovec iovec; 147 char message[CMSG_SPACE(sizeof(int))]; 148 struct msghdr msghdr; 149 ssize_t len; 150 151 bzero(&msghdr, sizeof(msghdr)); 152 bzero(&message, sizeof(message)); 153 154 msghdr.msg_control = message; 155 msghdr.msg_controllen = sizeof(message); 156 157 iovec.iov_base = payload; 158 iovec.iov_len = paylen; 159 160 msghdr.msg_iov = &iovec; 161 msghdr.msg_iovlen = 1; 162 163 putfds(message, send_fd, 1); 164 len = sendmsg(sockfd, &msghdr, 0); 165 ATF_REQUIRE_MSG(len != -1, "sendmsg failed: %s", strerror(errno)); 166 return ((size_t)len); 167 } 168 169 static void 170 sendfd(int sockfd, int send_fd) 171 { 172 size_t len; 173 char ch; 174 175 ch = 0; 176 len = sendfd_payload(sockfd, send_fd, &ch, sizeof(ch)); 177 ATF_REQUIRE_MSG(len == sizeof(ch), 178 "sendmsg: %zu bytes sent; expected %zu; %s", len, sizeof(ch), 179 strerror(errno)); 180 } 181 182 static bool 183 localcreds(int sockfd) 184 { 185 socklen_t sz; 186 int rc, val; 187 188 sz = sizeof(val); 189 rc = getsockopt(sockfd, 0, LOCAL_CREDS, &val, &sz); 190 ATF_REQUIRE_MSG(rc != -1, "getsockopt(LOCAL_CREDS) failed: %s", 191 strerror(errno)); 192 return (val != 0); 193 } 194 195 static void 196 recvfd_payload(int sockfd, int *recv_fd, void *buf, size_t buflen, 197 size_t cmsgsz) 198 { 199 struct cmsghdr *cmsghdr; 200 struct msghdr msghdr; 201 struct iovec iovec; 202 char *message; 203 ssize_t len; 204 bool foundcreds; 205 206 bzero(&msghdr, sizeof(msghdr)); 207 message = malloc(cmsgsz); 208 ATF_REQUIRE(message != NULL); 209 210 msghdr.msg_control = message; 211 msghdr.msg_controllen = cmsgsz; 212 213 iovec.iov_base = buf; 214 iovec.iov_len = buflen; 215 216 msghdr.msg_iov = &iovec; 217 msghdr.msg_iovlen = 1; 218 219 len = recvmsg(sockfd, &msghdr, 0); 220 ATF_REQUIRE_MSG(len != -1, "recvmsg failed: %s", strerror(errno)); 221 ATF_REQUIRE_MSG((size_t)len == buflen, 222 "recvmsg: %zd bytes received; expected %zd", len, buflen); 223 224 cmsghdr = CMSG_FIRSTHDR(&msghdr); 225 ATF_REQUIRE_MSG(cmsghdr != NULL, 226 "recvmsg: did not receive control message"); 227 foundcreds = false; 228 *recv_fd = -1; 229 for (; cmsghdr != NULL; cmsghdr = CMSG_NXTHDR(&msghdr, cmsghdr)) { 230 if (cmsghdr->cmsg_level == SOL_SOCKET && 231 cmsghdr->cmsg_type == SCM_RIGHTS && 232 cmsghdr->cmsg_len == CMSG_LEN(sizeof(int))) { 233 memcpy(recv_fd, CMSG_DATA(cmsghdr), sizeof(int)); 234 ATF_REQUIRE(*recv_fd != -1); 235 } else if (cmsghdr->cmsg_level == SOL_SOCKET && 236 cmsghdr->cmsg_type == SCM_CREDS) 237 foundcreds = true; 238 } 239 ATF_REQUIRE_MSG(*recv_fd != -1, 240 "recvmsg: did not receive single-fd message"); 241 ATF_REQUIRE_MSG(!localcreds(sockfd) || foundcreds, 242 "recvmsg: expected credentials were not received"); 243 } 244 245 static void 246 recvfd(int sockfd, int *recv_fd) 247 { 248 char ch = 0; 249 250 recvfd_payload(sockfd, recv_fd, &ch, sizeof(ch), 251 CMSG_SPACE(sizeof(int))); 252 } 253 254 /* 255 * Put a temporary file into a UNIX domain socket, then take it out and make 256 * sure it's the same file. First time around, don't close the reference 257 * after sending. 258 */ 259 ATF_TC_WITHOUT_HEAD(simple_send_fd); 260 ATF_TC_BODY(simple_send_fd, tc) 261 { 262 struct stat getfd_stat, putfd_stat; 263 int fd[2], getfd, putfd; 264 265 domainsocketpair(fd); 266 tempfile(&putfd); 267 dofstat(putfd, &putfd_stat); 268 sendfd(fd[0], putfd); 269 recvfd(fd[1], &getfd); 270 dofstat(getfd, &getfd_stat); 271 samefile(&putfd_stat, &getfd_stat); 272 close(putfd); 273 close(getfd); 274 closesocketpair(fd); 275 } 276 277 /* 278 * Same as simple_send_fd, only close the file reference after sending, so that 279 * the only reference is the descriptor in the UNIX domain socket buffer. 280 */ 281 ATF_TC_WITHOUT_HEAD(send_and_close); 282 ATF_TC_BODY(send_and_close, tc) 283 { 284 struct stat getfd_stat, putfd_stat; 285 int fd[2], getfd, putfd; 286 287 domainsocketpair(fd); 288 tempfile(&putfd); 289 dofstat(putfd, &putfd_stat); 290 sendfd(fd[0], putfd); 291 close(putfd); 292 recvfd(fd[1], &getfd); 293 dofstat(getfd, &getfd_stat); 294 samefile(&putfd_stat, &getfd_stat); 295 close(getfd); 296 closesocketpair(fd); 297 } 298 299 /* 300 * Put a temporary file into a UNIX domain socket, then close both endpoints 301 * causing garbage collection to kick off. 302 */ 303 ATF_TC_WITHOUT_HEAD(send_and_cancel); 304 ATF_TC_BODY(send_and_cancel, tc) 305 { 306 int fd[2], putfd; 307 308 domainsocketpair(fd); 309 tempfile(&putfd); 310 sendfd(fd[0], putfd); 311 close(putfd); 312 closesocketpair(fd); 313 } 314 315 /* 316 * Send two files. Then receive them. Make sure they are returned in the 317 * right order, and both get there. 318 */ 319 ATF_TC_WITHOUT_HEAD(two_files); 320 ATF_TC_BODY(two_files, tc) 321 { 322 struct stat getfd_1_stat, getfd_2_stat, putfd_1_stat, putfd_2_stat; 323 int fd[2], getfd_1, getfd_2, putfd_1, putfd_2; 324 325 domainsocketpair(fd); 326 tempfile(&putfd_1); 327 tempfile(&putfd_2); 328 dofstat(putfd_1, &putfd_1_stat); 329 dofstat(putfd_2, &putfd_2_stat); 330 sendfd(fd[0], putfd_1); 331 sendfd(fd[0], putfd_2); 332 close(putfd_1); 333 close(putfd_2); 334 recvfd(fd[1], &getfd_1); 335 recvfd(fd[1], &getfd_2); 336 dofstat(getfd_1, &getfd_1_stat); 337 dofstat(getfd_2, &getfd_2_stat); 338 samefile(&putfd_1_stat, &getfd_1_stat); 339 samefile(&putfd_2_stat, &getfd_2_stat); 340 close(getfd_1); 341 close(getfd_2); 342 closesocketpair(fd); 343 } 344 345 /* 346 * Big bundling test. Send an endpoint of the UNIX domain socket over itself, 347 * closing the door behind it. 348 */ 349 ATF_TC_WITHOUT_HEAD(bundle); 350 ATF_TC_BODY(bundle, tc) 351 { 352 int fd[2], getfd; 353 354 domainsocketpair(fd); 355 356 sendfd(fd[0], fd[0]); 357 close(fd[0]); 358 recvfd(fd[1], &getfd); 359 close(getfd); 360 close(fd[1]); 361 } 362 363 /* 364 * Big bundling test part two: Send an endpoint of the UNIX domain socket over 365 * itself, close the door behind it, and never remove it from the other end. 366 */ 367 ATF_TC_WITHOUT_HEAD(bundle_cancel); 368 ATF_TC_BODY(bundle_cancel, tc) 369 { 370 int fd[2]; 371 372 domainsocketpair(fd); 373 sendfd(fd[0], fd[0]); 374 sendfd(fd[1], fd[0]); 375 closesocketpair(fd); 376 } 377 378 /* 379 * Test for PR 151758: Send an character device over the UNIX domain socket 380 * and then close both sockets to orphan the device. 381 */ 382 ATF_TC_WITHOUT_HEAD(devfs_orphan); 383 ATF_TC_BODY(devfs_orphan, tc) 384 { 385 int fd[2], putfd; 386 387 domainsocketpair(fd); 388 devnull(&putfd); 389 sendfd(fd[0], putfd); 390 close(putfd); 391 closesocketpair(fd); 392 } 393 394 #define LOCAL_SENDSPACE_SYSCTL "net.local.stream.sendspace" 395 396 /* 397 * Test for PR 181741. Receiver sets LOCAL_CREDS, and kernel prepends a 398 * control message to the data. Sender sends large payload using a non-blocking 399 * socket. Payload + SCM_RIGHTS + LOCAL_CREDS hit socket buffer limit, and 400 * receiver receives truncated data. 401 */ 402 ATF_TC_WITHOUT_HEAD(rights_creds_payload); 403 ATF_TC_BODY(rights_creds_payload, tc) 404 { 405 const int on = 1; 406 u_long sendspace; 407 size_t len; 408 void *buf; 409 int fd[2], getfd, putfd, rc; 410 411 len = sizeof(sendspace); 412 rc = sysctlbyname(LOCAL_SENDSPACE_SYSCTL, &sendspace, 413 &len, NULL, 0); 414 ATF_REQUIRE_MSG(rc != -1, 415 "sysctl %s failed: %s", LOCAL_SENDSPACE_SYSCTL, strerror(errno)); 416 417 buf = calloc(1, sendspace); 418 ATF_REQUIRE(buf != NULL); 419 420 domainsocketpair(fd); 421 tempfile(&putfd); 422 423 rc = fcntl(fd[0], F_SETFL, O_NONBLOCK); 424 ATF_REQUIRE_MSG(rc != -1, "fcntl(O_NONBLOCK) failed: %s", 425 strerror(errno)); 426 rc = setsockopt(fd[1], 0, LOCAL_CREDS, &on, sizeof(on)); 427 ATF_REQUIRE_MSG(rc != -1, "setsockopt(LOCAL_CREDS) failed: %s", 428 strerror(errno)); 429 430 len = sendfd_payload(fd[0], putfd, buf, sendspace); 431 ATF_REQUIRE_MSG(len < sendspace, "sendmsg: %zu bytes sent", len); 432 recvfd_payload(fd[1], &getfd, buf, len, 433 CMSG_SPACE(SOCKCREDSIZE(CMGROUP_MAX)) + CMSG_SPACE(sizeof(int))); 434 435 close(putfd); 436 close(getfd); 437 closesocketpair(fd); 438 } 439 440 static void 441 send_cmsg(int sockfd, void *cmsg, size_t cmsgsz) 442 { 443 struct iovec iov; 444 struct msghdr msghdr; 445 ssize_t len; 446 char ch; 447 448 ch = 0; 449 bzero(&msghdr, sizeof(msghdr)); 450 451 iov.iov_base = &ch; 452 iov.iov_len = sizeof(ch); 453 msghdr.msg_control = cmsg; 454 msghdr.msg_controllen = cmsgsz; 455 msghdr.msg_iov = &iov; 456 msghdr.msg_iovlen = 1; 457 458 len = sendmsg(sockfd, &msghdr, 0); 459 ATF_REQUIRE_MSG(len != -1, 460 "sendmsg failed: %s", strerror(errno)); 461 ATF_REQUIRE_MSG(len == sizeof(ch), 462 "sendmsg: %zd bytes sent; expected %zu", len, sizeof(ch)); 463 } 464 465 static void 466 recv_cmsg(int sockfd, char *cmsg, size_t cmsgsz, int flags) 467 { 468 struct iovec iov; 469 struct msghdr msghdr; 470 ssize_t len; 471 char ch; 472 473 ch = 0; 474 bzero(&msghdr, sizeof(msghdr)); 475 476 iov.iov_base = &ch; 477 iov.iov_len = sizeof(ch); 478 msghdr.msg_control = cmsg; 479 msghdr.msg_controllen = cmsgsz; 480 msghdr.msg_iov = &iov; 481 msghdr.msg_iovlen = 1; 482 483 len = recvmsg(sockfd, &msghdr, 0); 484 ATF_REQUIRE_MSG(len != -1, 485 "recvmsg failed: %s", strerror(errno)); 486 ATF_REQUIRE_MSG(len == sizeof(ch), 487 "recvmsg: %zd bytes received; expected %zu", len, sizeof(ch)); 488 ATF_REQUIRE_MSG((msghdr.msg_flags & flags) == flags, 489 "recvmsg: got flags %#x; expected %#x", msghdr.msg_flags, flags); 490 } 491 492 /* 493 * Test for PR 131876. Receiver uses a control message buffer that is too 494 * small for the incoming SCM_RIGHTS message, so the message is truncated. 495 * The kernel must not leak the copied right into the receiver's namespace. 496 */ 497 ATF_TC_WITHOUT_HEAD(truncated_rights); 498 ATF_TC_BODY(truncated_rights, tc) 499 { 500 char *message; 501 int fd[2], nfds, putfd, rc; 502 503 domainsocketpair(fd); 504 devnull(&putfd); 505 nfds = getnfds(); 506 507 /* 508 * Case 1: Send a single descriptor and truncate the message. 509 */ 510 message = malloc(CMSG_SPACE(sizeof(int))); 511 ATF_REQUIRE(message != NULL); 512 putfds(message, putfd, 1); 513 send_cmsg(fd[0], message, CMSG_LEN(sizeof(int))); 514 recv_cmsg(fd[1], message, CMSG_LEN(0), MSG_CTRUNC); 515 ATF_REQUIRE(getnfds() == nfds); 516 free(message); 517 518 /* 519 * Case 2a: Send two descriptors in separate messages, and truncate at 520 * the boundary between the two messages. We should still 521 * receive the first message. 522 */ 523 message = malloc(CMSG_SPACE(sizeof(int)) * 2); 524 ATF_REQUIRE(message != NULL); 525 putfds(message, putfd, 1); 526 putfds(message + CMSG_SPACE(sizeof(int)), putfd, 1); 527 send_cmsg(fd[0], message, CMSG_SPACE(sizeof(int)) * 2); 528 recv_cmsg(fd[1], message, CMSG_SPACE(sizeof(int)), MSG_CTRUNC); 529 rc = close(*(int *)CMSG_DATA(message)); 530 ATF_REQUIRE_MSG(rc == 0, "close failed: %s", strerror(errno)); 531 ATF_REQUIRE(getnfds() == nfds); 532 free(message); 533 534 /* 535 * Case 2b: Send two descriptors in separate messages, and truncate 536 * before the end of the first message. 537 */ 538 message = malloc(CMSG_SPACE(sizeof(int)) * 2); 539 ATF_REQUIRE(message != NULL); 540 putfds(message, putfd, 1); 541 putfds(message + CMSG_SPACE(sizeof(int)), putfd, 1); 542 send_cmsg(fd[0], message, CMSG_SPACE(sizeof(int)) * 2); 543 recv_cmsg(fd[1], message, CMSG_SPACE(0), MSG_CTRUNC); 544 ATF_REQUIRE(getnfds() == nfds); 545 free(message); 546 547 /* 548 * Case 2c: Send two descriptors in separate messages, and truncate 549 * after the end of the first message. We should still 550 * receive the first message. 551 */ 552 message = malloc(CMSG_SPACE(sizeof(int)) * 2); 553 ATF_REQUIRE(message != NULL); 554 putfds(message, putfd, 1); 555 putfds(message + CMSG_SPACE(sizeof(int)), putfd, 1); 556 send_cmsg(fd[0], message, CMSG_SPACE(sizeof(int)) * 2); 557 recv_cmsg(fd[1], message, CMSG_SPACE(sizeof(int)) + CMSG_SPACE(0), 558 MSG_CTRUNC); 559 rc = close(*(int *)CMSG_DATA(message)); 560 ATF_REQUIRE_MSG(rc == 0, "close failed: %s", strerror(errno)); 561 ATF_REQUIRE(getnfds() == nfds); 562 free(message); 563 564 /* 565 * Case 3: Send three descriptors in the same message, and leave space 566 * only for the first when receiving the message. 567 */ 568 message = malloc(CMSG_SPACE(sizeof(int) * 3)); 569 ATF_REQUIRE(message != NULL); 570 putfds(message, putfd, 3); 571 send_cmsg(fd[0], message, CMSG_SPACE(sizeof(int) * 3)); 572 recv_cmsg(fd[1], message, CMSG_SPACE(sizeof(int)), MSG_CTRUNC); 573 ATF_REQUIRE(getnfds() == nfds); 574 free(message); 575 576 close(putfd); 577 closesocketpair(fd); 578 } 579 580 /* 581 * Ensure that an attempt to copy a SCM_RIGHTS message to the recipient 582 * fails. In this case the kernel must dispose of the externalized rights 583 * rather than leaking them into the recipient's file descriptor table. 584 */ 585 ATF_TC_WITHOUT_HEAD(copyout_rights_error); 586 ATF_TC_BODY(copyout_rights_error, tc) 587 { 588 struct iovec iovec; 589 struct msghdr msghdr; 590 char buf[16]; 591 ssize_t len; 592 int fd[2], error, nfds, putfd; 593 594 memset(buf, 0, sizeof(buf)); 595 domainsocketpair(fd); 596 devnull(&putfd); 597 nfds = getnfds(); 598 599 sendfd_payload(fd[0], putfd, buf, sizeof(buf)); 600 601 bzero(&msghdr, sizeof(msghdr)); 602 603 iovec.iov_base = buf; 604 iovec.iov_len = sizeof(buf); 605 msghdr.msg_control = (char *)-1; /* trigger EFAULT */ 606 msghdr.msg_controllen = CMSG_SPACE(sizeof(int)); 607 msghdr.msg_iov = &iovec; 608 msghdr.msg_iovlen = 1; 609 610 len = recvmsg(fd[1], &msghdr, 0); 611 error = errno; 612 ATF_REQUIRE_MSG(len == -1, "recvmsg succeeded: %zd", len); 613 ATF_REQUIRE_MSG(errno == EFAULT, "expected EFAULT, got %d (%s)", 614 error, strerror(errno)); 615 616 /* Verify that no FDs were leaked. */ 617 ATF_REQUIRE(getnfds() == nfds); 618 619 close(putfd); 620 closesocketpair(fd); 621 } 622 623 /* 624 * Verify that we can handle empty rights messages. Try sending two SCM_RIGHTS 625 * messages with a single call, one empty and one containing a single FD. 626 */ 627 ATF_TC_WITHOUT_HEAD(empty_rights_message); 628 ATF_TC_BODY(empty_rights_message, tc) 629 { 630 struct iovec iov; 631 struct msghdr msghdr; 632 char *cm, message[CMSG_SPACE(0) + CMSG_SPACE(sizeof(int))]; 633 ssize_t len; 634 int error, fd[2], putfd; 635 636 domainsocketpair(fd); 637 devnull(&putfd); 638 639 /* 640 * First, try sending an empty message followed by a non-empty message. 641 */ 642 cm = message; 643 putfds(cm, -1, 0); 644 cm += CMSG_SPACE(0); 645 putfds(cm, putfd, 1); 646 647 memset(&msghdr, 0, sizeof(msghdr)); 648 iov.iov_base = NULL; 649 iov.iov_len = 0; 650 msghdr.msg_control = message; 651 msghdr.msg_controllen = sizeof(message); 652 msghdr.msg_iov = &iov; 653 msghdr.msg_iovlen = 1; 654 655 len = sendmsg(fd[0], &msghdr, 0); 656 ATF_REQUIRE_MSG(len == 0, "sendmsg failed: %s", strerror(errno)); 657 658 /* Only the non-empty message should be received. */ 659 len = recvmsg(fd[1], &msghdr, 0); 660 ATF_REQUIRE_MSG(len == 0, "recvmsg failed: %s", strerror(errno)); 661 ATF_REQUIRE(msghdr.msg_controllen = CMSG_SPACE(sizeof(int))); 662 error = close((int *)CMSG_DATA(msghdr.msg_control)); 663 ATF_REQUIRE_MSG(error == 0, "close failed: %s", strerror(errno)); 664 665 /* 666 * Now try sending with the non-empty message before the empty message. 667 */ 668 cm = message; 669 putfds(cm, putfd, 1); 670 cm += CMSG_SPACE(sizeof(int)); 671 putfds(cm, -1, 0); 672 673 memset(&msghdr, 0, sizeof(msghdr)); 674 iov.iov_base = NULL; 675 iov.iov_len = 0; 676 msghdr.msg_control = message; 677 msghdr.msg_controllen = CMSG_SPACE(sizeof(int)); 678 msghdr.msg_iov = &iov; 679 msghdr.msg_iovlen = 1; 680 681 len = sendmsg(fd[0], &msghdr, 0); 682 ATF_REQUIRE_MSG(len == 0, "sendmsg failed: %s", strerror(errno)); 683 684 /* Only the non-empty message should be received. */ 685 len = recvmsg(fd[1], &msghdr, 0); 686 ATF_REQUIRE_MSG(len == 0, "recvmsg failed: %s", strerror(errno)); 687 ATF_REQUIRE(msghdr.msg_controllen = CMSG_SPACE(sizeof(int))); 688 error = close((int *)CMSG_DATA(msghdr.msg_control)); 689 ATF_REQUIRE_MSG(error == 0, "close failed: %s", strerror(errno)); 690 691 (void)close(putfd); 692 } 693 694 ATF_TP_ADD_TCS(tp) 695 { 696 697 ATF_TP_ADD_TC(tp, simple_send_fd); 698 ATF_TP_ADD_TC(tp, send_and_close); 699 ATF_TP_ADD_TC(tp, send_and_cancel); 700 ATF_TP_ADD_TC(tp, two_files); 701 ATF_TP_ADD_TC(tp, bundle); 702 ATF_TP_ADD_TC(tp, bundle_cancel); 703 ATF_TP_ADD_TC(tp, devfs_orphan); 704 ATF_TP_ADD_TC(tp, rights_creds_payload); 705 ATF_TP_ADD_TC(tp, truncated_rights); 706 ATF_TP_ADD_TC(tp, copyout_rights_error); 707 ATF_TP_ADD_TC(tp, empty_rights_message); 708 709 return (atf_no_error()); 710 } 711