2 * Copyright (c) 2005 Robert N. M. Watson
3 * Copyright (c) 2015 Mark Johnston
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
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.
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
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD$");
31 #include <sys/types.h>
32 #include <sys/socket.h>
34 #include <sys/sysctl.h>
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.
57 domainsocketpair(int *fdp)
60 ATF_REQUIRE_MSG(socketpair(PF_UNIX, SOCK_STREAM, 0, fdp) != -1,
61 "socketpair(PF_UNIX, SOCK_STREAM) failed: %s", strerror(errno));
65 closesocketpair(int *fdp)
77 fd = open("/dev/null", O_RDONLY);
78 ATF_REQUIRE_MSG(fd != -1, "open failed: %s", strerror(errno));
88 snprintf(path, PATH_MAX, "%s/unix_passfd.XXXXXXXXXXXXXXX",
89 getenv("TMPDIR") == NULL ? "/tmp" : getenv("TMPDIR"));
91 ATF_REQUIRE_MSG(fd != -1, "mkstemp(%s) failed", path);
97 dofstat(int fd, struct stat *sb)
100 ATF_REQUIRE_MSG(fstat(fd, sb) == 0,
101 "fstat failed: %s", strerror(errno));
113 mib[2] = KERN_PROC_NFDS;
116 rc = sysctl(mib, 4, &n, &len, NULL, 0);
117 ATF_REQUIRE_MSG(rc != -1, "sysctl(KERN_PROC_NFDS) failed");
122 samefile(struct stat *sb1, struct stat *sb2)
125 ATF_REQUIRE_MSG(sb1->st_dev == sb2->st_dev, "different device");
126 ATF_REQUIRE_MSG(sb1->st_ino == sb2->st_ino, "different inode");
130 sendfd_payload(int sockfd, int send_fd, void *payload, size_t paylen)
133 char message[CMSG_SPACE(sizeof(int))];
134 struct cmsghdr *cmsghdr;
135 struct msghdr msghdr;
138 bzero(&msghdr, sizeof(msghdr));
139 bzero(&message, sizeof(message));
141 msghdr.msg_control = message;
142 msghdr.msg_controllen = sizeof(message);
144 iovec.iov_base = payload;
145 iovec.iov_len = paylen;
147 msghdr.msg_iov = &iovec;
148 msghdr.msg_iovlen = 1;
150 cmsghdr = (struct cmsghdr *)(void *)message;
151 cmsghdr->cmsg_len = CMSG_LEN(sizeof(int));
152 cmsghdr->cmsg_level = SOL_SOCKET;
153 cmsghdr->cmsg_type = SCM_RIGHTS;
154 memcpy(CMSG_DATA(cmsghdr), &send_fd, sizeof(int));
156 len = sendmsg(sockfd, &msghdr, 0);
157 ATF_REQUIRE_MSG(len != -1, "sendmsg failed: %s", strerror(errno));
158 ATF_REQUIRE_MSG((size_t)len == paylen,
159 "sendmsg: %zd messages sent; expected: %zu; %s", len, paylen,
164 sendfd(int sockfd, int send_fd)
168 sendfd_payload(sockfd, send_fd, &ch, sizeof(ch));
172 recvfd_payload(int sockfd, int *recv_fd, void *buf, size_t buflen)
174 struct cmsghdr *cmsghdr;
175 char message[CMSG_SPACE(SOCKCREDSIZE(CMGROUP_MAX)) +
176 CMSG_SPACE(sizeof(int))];
177 struct msghdr msghdr;
181 bzero(&msghdr, sizeof(msghdr));
183 msghdr.msg_control = message;
184 msghdr.msg_controllen = sizeof(message);
186 iovec.iov_base = buf;
187 iovec.iov_len = buflen;
189 msghdr.msg_iov = &iovec;
190 msghdr.msg_iovlen = 1;
192 len = recvmsg(sockfd, &msghdr, 0);
193 ATF_REQUIRE_MSG(len != -1, "recvmsg failed: %s", strerror(errno));
194 ATF_REQUIRE_MSG((size_t)len == buflen,
195 "recvmsg: %zd bytes received; expected %zd", len, buflen);
197 cmsghdr = CMSG_FIRSTHDR(&msghdr);
198 ATF_REQUIRE_MSG(cmsghdr != NULL,
199 "recvmsg: did not receive control message");
201 for (; cmsghdr != NULL; cmsghdr = CMSG_NXTHDR(&msghdr, cmsghdr)) {
202 if (cmsghdr->cmsg_level == SOL_SOCKET &&
203 cmsghdr->cmsg_type == SCM_RIGHTS &&
204 cmsghdr->cmsg_len == CMSG_LEN(sizeof(int))) {
205 memcpy(recv_fd, CMSG_DATA(cmsghdr), sizeof(int));
206 ATF_REQUIRE(*recv_fd != -1);
209 ATF_REQUIRE_MSG(*recv_fd != -1,
210 "recvmsg: did not receive single-fd message");
214 recvfd(int sockfd, int *recv_fd)
218 recvfd_payload(sockfd, recv_fd, &ch, sizeof(ch));
222 * Put a temporary file into a UNIX domain socket, then take it out and make
223 * sure it's the same file. First time around, don't close the reference
226 ATF_TC_WITHOUT_HEAD(simple_send_fd);
227 ATF_TC_BODY(simple_send_fd, tc)
229 struct stat getfd_stat, putfd_stat;
230 int fd[2], getfd, putfd;
232 domainsocketpair(fd);
234 dofstat(putfd, &putfd_stat);
235 sendfd(fd[0], putfd);
236 recvfd(fd[1], &getfd);
237 dofstat(getfd, &getfd_stat);
238 samefile(&putfd_stat, &getfd_stat);
245 * Same as simple_send_fd, only close the file reference after sending, so that
246 * the only reference is the descriptor in the UNIX domain socket buffer.
248 ATF_TC_WITHOUT_HEAD(send_and_close);
249 ATF_TC_BODY(send_and_close, tc)
251 struct stat getfd_stat, putfd_stat;
252 int fd[2], getfd, putfd;
254 domainsocketpair(fd);
256 dofstat(putfd, &putfd_stat);
257 sendfd(fd[0], putfd);
259 recvfd(fd[1], &getfd);
260 dofstat(getfd, &getfd_stat);
261 samefile(&putfd_stat, &getfd_stat);
267 * Put a temporary file into a UNIX domain socket, then close both endpoints
268 * causing garbage collection to kick off.
270 ATF_TC_WITHOUT_HEAD(send_and_cancel);
271 ATF_TC_BODY(send_and_cancel, tc)
275 domainsocketpair(fd);
277 sendfd(fd[0], putfd);
283 * Send two files. Then receive them. Make sure they are returned in the
284 * right order, and both get there.
286 ATF_TC_WITHOUT_HEAD(two_files);
287 ATF_TC_BODY(two_files, tc)
289 struct stat getfd_1_stat, getfd_2_stat, putfd_1_stat, putfd_2_stat;
290 int fd[2], getfd_1, getfd_2, putfd_1, putfd_2;
292 domainsocketpair(fd);
295 dofstat(putfd_1, &putfd_1_stat);
296 dofstat(putfd_2, &putfd_2_stat);
297 sendfd(fd[0], putfd_1);
298 sendfd(fd[0], putfd_2);
301 recvfd(fd[1], &getfd_1);
302 recvfd(fd[1], &getfd_2);
303 dofstat(getfd_1, &getfd_1_stat);
304 dofstat(getfd_2, &getfd_2_stat);
305 samefile(&putfd_1_stat, &getfd_1_stat);
306 samefile(&putfd_2_stat, &getfd_2_stat);
313 * Big bundling test. Send an endpoint of the UNIX domain socket over itself,
314 * closing the door behind it.
316 ATF_TC_WITHOUT_HEAD(bundle);
317 ATF_TC_BODY(bundle, tc)
321 domainsocketpair(fd);
323 sendfd(fd[0], fd[0]);
325 recvfd(fd[1], &getfd);
331 * Big bundling test part two: Send an endpoint of the UNIX domain socket over
332 * itself, close the door behind it, and never remove it from the other end.
334 ATF_TC_WITHOUT_HEAD(bundle_cancel);
335 ATF_TC_BODY(bundle_cancel, tc)
339 domainsocketpair(fd);
340 sendfd(fd[0], fd[0]);
341 sendfd(fd[1], fd[0]);
346 * Test for PR 151758: Send an character device over the UNIX domain socket
347 * and then close both sockets to orphan the device.
349 ATF_TC_WITHOUT_HEAD(devfs_orphan);
350 ATF_TC_BODY(devfs_orphan, tc)
354 domainsocketpair(fd);
356 sendfd(fd[0], putfd);
361 #define LOCAL_SENDSPACE_SYSCTL "net.local.stream.sendspace"
364 * Test for PR 181741. Receiver sets LOCAL_CREDS, and kernel prepends a
365 * control message to the data. Sender sends large payload.
366 * Payload + SCM_RIGHTS + LOCAL_CREDS hit socket buffer limit, and receiver
367 * receives truncated data.
369 ATF_TC_WITHOUT_HEAD(rights_creds_payload);
370 ATF_TC_BODY(rights_creds_payload, tc)
376 int fd[2], getfd, putfd, rc;
378 atf_tc_expect_fail("PR 181741: Packet loss when 'control' messages "
379 "are present with large data");
381 len = sizeof(sendspace);
382 rc = sysctlbyname(LOCAL_SENDSPACE_SYSCTL, &sendspace,
384 ATF_REQUIRE_MSG(rc != -1,
385 "sysctl %s failed: %s", LOCAL_SENDSPACE_SYSCTL, strerror(errno));
387 buf = calloc(1, sendspace);
388 ATF_REQUIRE(buf != NULL);
390 domainsocketpair(fd);
391 rc = setsockopt(fd[1], 0, LOCAL_CREDS, &on, sizeof(on));
392 ATF_REQUIRE_MSG(rc != -1, "setsockopt(LOCAL_CREDS) failed: %s",
395 sendfd_payload(fd[0], putfd, buf, sendspace);
396 recvfd_payload(fd[1], &getfd, buf, sendspace);
403 * Test for PR 131876. Receiver uses a control message buffer that is too
404 * small for the incoming SCM_RIGHTS message, so the message is truncated.
405 * The kernel must not leak the copied right into the receiver's namespace.
407 ATF_TC_WITHOUT_HEAD(truncated_rights);
408 ATF_TC_BODY(truncated_rights, tc)
411 struct msghdr msghdr;
412 char buf[16], message[CMSG_SPACE(0)];
414 int fd[2], nfds, putfd;
416 atf_tc_expect_fail("PR 131876: "
417 "FD leak when 'control' message is truncated");
419 memset(buf, 42, sizeof(buf));
420 domainsocketpair(fd);
424 sendfd_payload(fd[0], putfd, buf, sizeof(buf));
426 bzero(&msghdr, sizeof(msghdr));
427 bzero(message, sizeof(message));
429 iovec.iov_base = buf;
430 iovec.iov_len = sizeof(buf);
431 msghdr.msg_control = message;
432 msghdr.msg_controllen = sizeof(message);
433 msghdr.msg_iov = &iovec;
434 msghdr.msg_iovlen = 1;
436 len = recvmsg(fd[1], &msghdr, 0);
437 ATF_REQUIRE_MSG(len != -1, "recvmsg failed: %s", strerror(errno));
438 ATF_REQUIRE_MSG((size_t)len == sizeof(buf),
439 "recvmsg: %zd bytes received; expected %zd", len, sizeof(buf));
440 for (size_t i = 0; i < sizeof(buf); i++)
441 ATF_REQUIRE_MSG(buf[i] == 42, "unexpected buffer contents");
443 ATF_REQUIRE_MSG((msghdr.msg_flags & MSG_CTRUNC) != 0,
444 "MSG_CTRUNC not set after truncation");
445 ATF_REQUIRE(getnfds() == nfds);
451 ATF_TC_WITHOUT_HEAD(copyout_rights_error);
452 ATF_TC_BODY(copyout_rights_error, tc)
455 struct msghdr msghdr;
458 int fd[2], error, nfds, putfd;
460 atf_tc_expect_fail("PR 131876: "
461 "FD leak when copyout of rights returns an error");
463 memset(buf, 0, sizeof(buf));
464 domainsocketpair(fd);
468 sendfd_payload(fd[0], putfd, buf, sizeof(buf));
470 bzero(&msghdr, sizeof(msghdr));
472 iovec.iov_base = buf;
473 iovec.iov_len = sizeof(buf);
474 msghdr.msg_control = (char *)-1; /* trigger EFAULT */
475 msghdr.msg_controllen = CMSG_SPACE(sizeof(int));
476 msghdr.msg_iov = &iovec;
477 msghdr.msg_iovlen = 1;
479 len = recvmsg(fd[1], &msghdr, 0);
481 ATF_REQUIRE_MSG(len == -1, "recvmsg succeeded: %zd", len);
482 ATF_REQUIRE_MSG(errno == EFAULT, "expected EFAULT, got %d (%s)",
483 error, strerror(errno));
485 /* Verify that no FDs were leaked. */
486 ATF_REQUIRE(getnfds() == nfds);
495 ATF_TP_ADD_TC(tp, simple_send_fd);
496 ATF_TP_ADD_TC(tp, send_and_close);
497 ATF_TP_ADD_TC(tp, send_and_cancel);
498 ATF_TP_ADD_TC(tp, two_files);
499 ATF_TP_ADD_TC(tp, bundle);
500 ATF_TP_ADD_TC(tp, bundle_cancel);
501 ATF_TP_ADD_TC(tp, devfs_orphan);
502 ATF_TP_ADD_TC(tp, rights_creds_payload);
503 ATF_TP_ADD_TC(tp, truncated_rights);
504 ATF_TP_ADD_TC(tp, copyout_rights_error);
506 return (atf_no_error());