diff --git a/tests/sys/kern/unix_dgram.c b/tests/sys/kern/unix_dgram.c index 93669a30d4c5..9df0d4ca7168 100644 --- a/tests/sys/kern/unix_dgram.c +++ b/tests/sys/kern/unix_dgram.c @@ -1,374 +1,402 @@ /*- * SPDX-License-Identifier: BSD-2-Clause * * Copyright (c) 2022 Gleb Smirnoff * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include #include #include #include #include #include #include #include #include #include #include +#include #include #include static struct itimerval itv = { .it_interval = { 0, 0 }, .it_value = { 1, 0 }, /* one second */ }; static sig_atomic_t timer_done = 0; static void sigalarm(int sig __unused) { timer_done = 1; } static struct sigaction sigact = { .sa_handler = sigalarm, }; static struct sockaddr_un sun = { .sun_family = AF_LOCAL, .sun_len = sizeof(sun), .sun_path = "unix_dgram_listener", }; /* * Fill socket to a state when next send(len) would fail. * * Note that every datagram is prepended with sender address, * size of struct sockaddr. */ static void fill(int fd, void *buf, ssize_t len) { unsigned long recvspace; size_t llen = sizeof(unsigned long); ssize_t sent; ATF_REQUIRE(sysctlbyname("net.local.dgram.recvspace", &recvspace, &llen, NULL, 0) == 0); for (sent = 0; sent + len + sizeof(struct sockaddr) < recvspace; sent += len + sizeof(struct sockaddr)) ATF_REQUIRE(send(fd, buf, len, 0) == len); } ATF_TC_WITHOUT_HEAD(basic); ATF_TC_BODY(basic, tc) { struct msghdr msg; struct iovec iov[1]; unsigned long maxdgram; size_t llen = sizeof(unsigned long); int fd[2]; char *buf; /* Allocate and initialize: * - fd[0] to send, fd[1] to receive * - buf[maxdgram] for data */ ATF_REQUIRE(sysctlbyname("net.local.dgram.maxdgram", &maxdgram, &llen, NULL, 0) == 0); ATF_REQUIRE(socketpair(PF_UNIX, SOCK_DGRAM, 0, fd) != -1); buf = malloc(maxdgram + 1); ATF_REQUIRE(buf); msg = (struct msghdr ){ .msg_iov = iov, .msg_iovlen = 1, }; iov[0] = (struct iovec ){ .iov_base = buf, }; /* Fail to send > maxdgram. */ ATF_REQUIRE(send(fd[0], buf, maxdgram + 1, 0) == -1); ATF_REQUIRE(errno == EMSGSIZE); /* Send maxdgram. */ ATF_REQUIRE(send(fd[0], buf, maxdgram, 0) == (ssize_t)maxdgram); /* Exercise MSG_PEEK, full and truncated.. */ ATF_REQUIRE(recv(fd[1], buf, maxdgram, MSG_PEEK) == (ssize_t)maxdgram); iov[0].iov_len = 42; ATF_REQUIRE(recvmsg(fd[1], &msg, MSG_PEEK) == 42); ATF_REQUIRE(msg.msg_flags == (MSG_PEEK | MSG_TRUNC)); /* Receive maxdgram. */ iov[0].iov_len = maxdgram; ATF_REQUIRE(recvmsg(fd[1], &msg, 0) == (ssize_t)maxdgram); ATF_REQUIRE(msg.msg_flags == 0); /* Receive truncated message. */ ATF_REQUIRE(send(fd[0], buf, maxdgram, 0) == (ssize_t)maxdgram); iov[0].iov_len = maxdgram / 2; ATF_REQUIRE(recvmsg(fd[1], &msg, 0) == (ssize_t)maxdgram / 2); ATF_REQUIRE(msg.msg_flags == MSG_TRUNC); /* Empty: block. */ ATF_REQUIRE(sigaction(SIGALRM, &sigact, NULL) == 0); ATF_REQUIRE(timer_done == 0); ATF_REQUIRE(setitimer(ITIMER_REAL, &itv, NULL) == 0); ATF_REQUIRE(recv(fd[1], buf, maxdgram, 0) == -1); ATF_REQUIRE(errno == EINTR); ATF_REQUIRE(timer_done == 1); /* Don't block with MSG_DONTWAIT. */ ATF_REQUIRE(recv(fd[1], buf, maxdgram, MSG_DONTWAIT) == -1); ATF_REQUIRE(errno == EAGAIN); /* Don't block with O_NONBLOCK. */ ATF_REQUIRE(fcntl(fd[1], F_SETFL, O_NONBLOCK) != -1); ATF_REQUIRE(recv(fd[1], buf, maxdgram, 0) == -1); ATF_REQUIRE(errno == EAGAIN); /* Fail with ENOBUFS on full socket. */ fill(fd[0], buf, maxdgram); ATF_REQUIRE(send(fd[0], buf, maxdgram, 0) == -1); ATF_REQUIRE(errno == ENOBUFS); /* * Fail with ENOBUFS with O_NONBLOCK set, too. See 71e70c25c00 * for explanation why this behavior needs to be preserved. */ ATF_REQUIRE(fcntl(fd[0], F_SETFL, O_NONBLOCK) != -1); ATF_REQUIRE(send(fd[0], buf, maxdgram, 0) == -1); ATF_REQUIRE(errno == ENOBUFS); /* Remote side closed -> ECONNRESET. */ close(fd[1]); ATF_REQUIRE(send(fd[0], buf, maxdgram, 0) == -1); ATF_REQUIRE(errno == ECONNRESET); } ATF_TC_WITHOUT_HEAD(one2many); ATF_TC_BODY(one2many, tc) { int one, many[3], two; #define BUFSIZE 1024 char buf[BUFSIZE], goodboy[BUFSIZE], flooder[BUFSIZE], notconn[BUFSIZE]; /* Establish one to many connection. */ ATF_REQUIRE((one = socket(PF_UNIX, SOCK_DGRAM, 0)) > 0); ATF_REQUIRE(bind(one, (struct sockaddr *)&sun, sizeof(sun)) == 0); /* listen(2) shall fail. */ ATF_REQUIRE(listen(one, -1) != 0); for (int i = 0; i < 3; i++) { ATF_REQUIRE((many[i] = socket(PF_UNIX, SOCK_DGRAM, 0)) > 0); ATF_REQUIRE(connect(many[i], (struct sockaddr *)&sun, sizeof(sun)) == 0); } /* accept() on UNIX/DGRAM is invalid. */ ATF_REQUIRE(accept(one, NULL, NULL) == -1); ATF_REQUIRE(errno == EINVAL); /* * Connecting a bound socket to self: a strange, useless, but * historically existing edge case that is not explicitly described * in SuS, neither is forbidden there. Works on FreeBSD and Linux. */ ATF_REQUIRE(connect(one, (struct sockaddr *)&sun, sizeof(sun)) == 0); ATF_REQUIRE(send(one, buf, 42, 0) == 42); ATF_REQUIRE(recv(one, buf, sizeof(buf), 0) == 42); /* * Interaction between concurrent senders. New feature in FreeBSD 14. * * One sender can not fill the receive side. Other senders can * continue operation. Senders who don't fill their buffers are * prioritized over flooders. Connected senders are prioritized over * unconnected. * * Disconnecting a sender that has queued data optionally preserves * the data. Allow the data to migrate to peers buffer only if the * latter is empty. Otherwise discard it, to prevent against * connect-fill-close attack. */ #define FLOODER 13 /* for connected flooder on many[0] */ #define GOODBOY 42 /* for a good boy on many[1] */ #define NOTCONN 66 /* for sendto(2) via two */ goodboy[0] = GOODBOY; flooder[0] = FLOODER; notconn[0] = NOTCONN; /* Connected priority over sendto(2). */ ATF_REQUIRE((two = socket(PF_UNIX, SOCK_DGRAM, 0)) > 0); ATF_REQUIRE(sendto(two, notconn, BUFSIZE, 0, (struct sockaddr *)&sun, sizeof(sun)) == BUFSIZE); ATF_REQUIRE(send(many[1], goodboy, BUFSIZE, 0) == BUFSIZE); ATF_REQUIRE(recv(one, buf, sizeof(buf), 0) == sizeof(buf)); ATF_REQUIRE(buf[0] == GOODBOY); /* message from good boy comes first */ ATF_REQUIRE(recv(one, buf, sizeof(buf), 0) == sizeof(buf)); ATF_REQUIRE(buf[0] == NOTCONN); /* only then message from sendto(2) */ /* Casual sender priority over a flooder. */ fill(many[0], flooder, sizeof(flooder)); ATF_REQUIRE(send(many[0], flooder, BUFSIZE, 0) == -1); ATF_REQUIRE(errno == ENOBUFS); ATF_REQUIRE(send(many[1], goodboy, BUFSIZE, 0) == BUFSIZE); ATF_REQUIRE(recv(one, buf, sizeof(buf), 0) == sizeof(buf)); ATF_REQUIRE(buf[0] == GOODBOY); /* message from good boy comes first */ ATF_REQUIRE(recv(one, buf, sizeof(buf), 0) == sizeof(buf)); ATF_REQUIRE(buf[0] == FLOODER); /* only then message from flooder */ /* Once seen, a message can't be deprioritized by any other message. */ ATF_REQUIRE(recv(one, buf, sizeof(buf), MSG_PEEK) == sizeof(buf)); ATF_REQUIRE(buf[0] == FLOODER); /* message from the flooder seen */ ATF_REQUIRE(send(many[1], goodboy, BUFSIZE, 0) == BUFSIZE); ATF_REQUIRE(recv(one, buf, sizeof(buf), MSG_PEEK) == sizeof(buf)); ATF_REQUIRE(buf[0] == FLOODER); /* should be the same message */ ATF_REQUIRE(recv(one, buf, sizeof(buf), 0) == sizeof(buf)); ATF_REQUIRE(buf[0] == FLOODER); /* now we read it out... */ ATF_REQUIRE(recv(one, buf, sizeof(buf), 0) == sizeof(buf)); ATF_REQUIRE(buf[0] == GOODBOY); /* ... and next one is the good boy */ /* Disconnect in presence of data from not connected. */ ATF_REQUIRE(sendto(two, notconn, BUFSIZE, 0, (struct sockaddr *)&sun, sizeof(sun)) == BUFSIZE); close(many[0]); ATF_REQUIRE(recv(one, buf, sizeof(buf), 0) == sizeof(buf)); ATF_REQUIRE(buf[0] == NOTCONN); /* message from sendto() */ ATF_REQUIRE(recv(one, buf, sizeof(buf), MSG_DONTWAIT) == -1); ATF_REQUIRE(errno == EAGAIN); /* data from many[0] discarded */ /* Disconnect in absence of data from not connected. */ ATF_REQUIRE(send(many[1], goodboy, BUFSIZE, 0) == BUFSIZE); close(many[1]); ATF_REQUIRE(recv(one, buf, sizeof(buf), 0) == sizeof(buf)); ATF_REQUIRE(buf[0] == GOODBOY); /* message from many[1] preserved */ /* Check that nothing leaks on close(2). */ ATF_REQUIRE(send(many[2], buf, 42, 0) == 42); ATF_REQUIRE(send(many[2], buf, 42, 0) == 42); ATF_REQUIRE(recv(one, buf, sizeof(buf), MSG_PEEK) == 42); ATF_REQUIRE(sendto(two, notconn, 42, 0, (struct sockaddr *)&sun, sizeof(sun)) == 42); close(one); } /* * Check that various mechanism report socket as readable and having * 42 bytes of data. */ static void test42(int fd) { /* ioctl(FIONREAD) */ int data; ATF_REQUIRE(ioctl(fd, FIONREAD, &data) != -1); ATF_REQUIRE(data == 42); /* select(2) */ fd_set rfds; FD_ZERO(&rfds); FD_SET(fd, &rfds); ATF_REQUIRE(select(fd + 1, &rfds, NULL, NULL, NULL) == 1); ATF_REQUIRE(FD_ISSET(fd, &rfds)); /* kevent(2) */ struct kevent ev; int kq; ATF_REQUIRE((kq = kqueue()) != -1); EV_SET(&ev, fd, EVFILT_READ, EV_ADD, NOTE_LOWAT, 41, NULL); ATF_REQUIRE(kevent(kq, &ev, 1, NULL, 0, NULL) == 0); ATF_REQUIRE(kevent(kq, NULL, 0, &ev, 1, NULL) == 1); ATF_REQUIRE(ev.filter == EVFILT_READ); ATF_REQUIRE(ev.data == 42); /* aio(4) */ char buf[50]; struct aiocb aio = { .aio_nbytes = 50, .aio_fildes = fd, .aio_buf = buf, }, *aiop; ATF_REQUIRE(aio_read(&aio) == 0); ATF_REQUIRE(aio_waitcomplete(&aiop, NULL) == 42); ATF_REQUIRE(aiop == &aio); } /* * Send data and control in connected & unconnected mode and check that * various event mechanisms see the data, but don't count control bytes. */ ATF_TC_WITHOUT_HEAD(event); ATF_TC_BODY(event, tc) { int fd[2]; char buf[50]; struct iovec iov = { .iov_base = buf, .iov_len = 42, }; struct cmsghdr cmsg = { .cmsg_len = CMSG_LEN(0), .cmsg_level = SOL_SOCKET, .cmsg_type = SCM_TIMESTAMP, }; struct msghdr msghdr = { .msg_iov = &iov, .msg_iovlen = 1, .msg_control = &cmsg, .msg_controllen = CMSG_LEN(0), }; /* Connected socket */ ATF_REQUIRE(socketpair(PF_UNIX, SOCK_DGRAM, 0, fd) != -1); ATF_REQUIRE(sendmsg(fd[0], &msghdr, 0) == 42); test42(fd[1]); close(fd[0]); close(fd[1]); /* Not-connected send */ ATF_REQUIRE((fd[0] = socket(PF_UNIX, SOCK_DGRAM, 0)) > 0); ATF_REQUIRE((fd[1] = socket(PF_UNIX, SOCK_DGRAM, 0)) > 0); ATF_REQUIRE(bind(fd[0], (struct sockaddr *)&sun, sizeof(sun)) == 0); ATF_REQUIRE(sendto(fd[1], buf, 42, 0, (struct sockaddr *)&sun, sizeof(sun)) == 42); test42(fd[0]); } -ATF_TP_ADD_TCS(tp) +ATF_TC_WITHOUT_HEAD(selfgetpeername); +ATF_TC_BODY(selfgetpeername, tc) { + struct sockaddr_un sun; + const char *name; + socklen_t len; + int sd; + + name = "selfgetpeername"; + + sd = socket(PF_UNIX, SOCK_DGRAM, 0); + ATF_REQUIRE(sd != -1); + + memset(&sun, 0, sizeof(sun)); + sun.sun_len = sizeof(sun); + sun.sun_family = AF_UNIX; + snprintf(sun.sun_path, sizeof(sun.sun_path), "%s", name); + ATF_REQUIRE(bind(sd, (struct sockaddr *)&sun, sizeof(sun)) == 0); + ATF_REQUIRE(connect(sd, (struct sockaddr *)&sun, sizeof(sun)) == 0); + + len = sizeof(sun); + ATF_REQUIRE(getpeername(sd, (struct sockaddr *)&sun, &len) == 0); + ATF_REQUIRE(strcmp(sun.sun_path, name) == 0); + ATF_REQUIRE(close(sd) == 0); +} + +ATF_TP_ADD_TCS(tp) +{ ATF_TP_ADD_TC(tp, basic); ATF_TP_ADD_TC(tp, one2many); ATF_TP_ADD_TC(tp, event); + ATF_TP_ADD_TC(tp, selfgetpeername); return (atf_no_error()); }