diff options
Diffstat (limited to 'tests/sys/kern/socket_msg_trunc.c')
| -rw-r--r-- | tests/sys/kern/socket_msg_trunc.c | 218 |
1 files changed, 218 insertions, 0 deletions
diff --git a/tests/sys/kern/socket_msg_trunc.c b/tests/sys/kern/socket_msg_trunc.c new file mode 100644 index 000000000000..bf1f0bf8ff42 --- /dev/null +++ b/tests/sys/kern/socket_msg_trunc.c @@ -0,0 +1,218 @@ +/*- + * SPDX-License-Identifier: BSD-2-Clause + * + * Copyright (c) 2022 Alexander V. Chernikov + * + * 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 <sys/param.h> +#include <sys/errno.h> +#include <sys/ktrace.h> +#include <sys/socket.h> +#include <sys/un.h> + +#include <netinet/in.h> + +#include <fcntl.h> +#include <poll.h> +#include <stdio.h> +#include <stdlib.h> + +#include <atf-c.h> + +static void +check_recvmsg(int cs, int ss, struct sockaddr *sa, const size_t sizes[], + size_t nsizes) +{ + char buf[9000]; + + memset(buf, 0xFF, sizeof(buf)); + for (size_t i = 0; i < nsizes; i++) { + ssize_t rc; + size_t sz = sizes[i]; + char tbuf[1]; + + ATF_REQUIRE(sz <= sizeof(buf)); + + rc = sendto(cs, buf, sz, 0, sa, sa->sa_len); + ATF_REQUIRE_MSG(rc != -1, "sendto failed: %s", strerror(errno)); + ATF_REQUIRE((size_t)rc == sz); + + rc = recv(ss, NULL, 0, MSG_PEEK | MSG_TRUNC); + ATF_REQUIRE_MSG(rc >= 0, "recv failed: %s", strerror(errno)); + ATF_REQUIRE((size_t)rc == sz); + + rc = recv(ss, tbuf, sizeof(tbuf), MSG_PEEK | MSG_TRUNC); + ATF_REQUIRE_MSG(rc >= 0, "recv failed: %s", strerror(errno)); + ATF_REQUIRE((size_t)rc == sz); + + rc = recv(ss, tbuf, sizeof(tbuf), MSG_TRUNC); + ATF_REQUIRE_MSG(rc >= 0, "recv failed: %s", strerror(errno)); + ATF_REQUIRE((size_t)rc == sz); + } + + ATF_REQUIRE(close(cs) == 0); + ATF_REQUIRE(close(ss) == 0); +} + +ATF_TC_WITHOUT_HEAD(recv_trunc_afinet_udp); +ATF_TC_BODY(recv_trunc_afinet_udp, tc) +{ + struct sockaddr_in sin; + struct sockaddr *sa; + int ss, cs, rc; + + ss = socket(PF_INET, SOCK_DGRAM, 0); + ATF_REQUIRE(ss >= 0); + + memset(&sin, 0, sizeof(sin)); + sin.sin_family = AF_INET; + sin.sin_len = sizeof(sin); + sin.sin_port = htons(6666); + sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK); + sa = (struct sockaddr *)&sin; + rc = bind(ss, sa, sa->sa_len); + ATF_REQUIRE_MSG(rc == 0, "bind failed: %s", strerror(errno)); + + cs = socket(PF_INET, SOCK_DGRAM, 0); + ATF_REQUIRE(cs >= 0); + + size_t sizes[] = {80, 255, 256, 1024, 4096, 9000}; + check_recvmsg(cs, ss, sa, sizes, nitems(sizes)); +} + +ATF_TC_WITHOUT_HEAD(recv_trunc_afinet6_udp); +ATF_TC_BODY(recv_trunc_afinet6_udp, tc) +{ + struct sockaddr_in6 sin6; + struct sockaddr *sa; + int cs, ss, rc; + + ss = socket(PF_INET6, SOCK_DGRAM, 0); + ATF_REQUIRE(ss >= 0); + + memset(&sin6, 0, sizeof(sin6)); + sin6.sin6_family = AF_INET6; + sin6.sin6_len = sizeof(sin6); + sin6.sin6_port = htons(6666); + const struct in6_addr in6loopback = IN6ADDR_LOOPBACK_INIT; + sin6.sin6_addr = in6loopback; + sa = (struct sockaddr *)&sin6; + rc = bind(ss, sa, sa->sa_len); + ATF_REQUIRE_MSG(rc == 0, "bind failed: %s", strerror(errno)); + + cs = socket(PF_INET6, SOCK_DGRAM, 0); + ATF_REQUIRE(cs >= 0); + + size_t sizes[] = {80, 255, 256, 1024, 4096, 9000}; + check_recvmsg(cs, ss, sa, sizes, nitems(sizes)); +} + +ATF_TC_WITHOUT_HEAD(recv_trunc_afunix_dgram); +ATF_TC_BODY(recv_trunc_afunix_dgram, tc) +{ + struct sockaddr_un sun; + struct sockaddr *sa; + int ss, cs, rc; + + ss = socket(PF_UNIX, SOCK_DGRAM, 0); + ATF_REQUIRE(ss >= 0); + + bzero(&sun, sizeof(sun)); + sun.sun_family = AF_UNIX; + strlcpy(sun.sun_path, "test_check_recvmsg_socket", sizeof(sun.sun_path)); + sun.sun_len = sizeof(sun); + sa = (struct sockaddr *)&sun; + rc = bind(ss, sa, sa->sa_len); + ATF_REQUIRE_MSG(rc == 0, "bind failed: %s", strerror(errno)); + + cs = socket(PF_UNIX, SOCK_DGRAM, 0); + ATF_REQUIRE(cs >= 0); + + size_t sizes[] = {80, 255, 256, 1024, 2000}; + check_recvmsg(cs, ss, sa, sizes, nitems(sizes)); +} + +/* + * Exercise the case where ktrace was used to dump a truncated buffer. + */ +ATF_TC_WITHOUT_HEAD(recvmsg_trunc_ktrace_uio); +ATF_TC_BODY(recvmsg_trunc_ktrace_uio, tc) +{ + struct ktr_header ktr; + struct msghdr msg; + struct iovec iov; + const char *tracepath; + char buf[128]; + ssize_t nbytes; + int error, fd, sd[2]; + + tracepath = "ktrace"; + + error = socketpair(AF_UNIX, SOCK_DGRAM, 0, sd); + ATF_REQUIRE(error == 0); + + memset(buf, 0, sizeof(buf)); + nbytes = send(sd[0], buf, sizeof(buf), 0); + ATF_REQUIRE_MSG(nbytes >= 0, "send failed: %s", strerror(errno)); + ATF_REQUIRE((size_t)nbytes == sizeof(buf)); + + fd = open(tracepath, O_RDWR | O_CREAT | O_TRUNC, 0644); + ATF_REQUIRE_MSG(fd >= 0, "open failed: %s", strerror(errno)); + error = ktrace(tracepath, KTROP_SET, KTRFAC_GENIO, getpid()); + ATF_REQUIRE_MSG(error == 0, + "ktrace(SET) failed: %s", strerror(errno)); + + iov.iov_base = buf; + iov.iov_len = sizeof(buf) - 1; /* truncate */ + memset(&msg, 0, sizeof(msg)); + msg.msg_iov = &iov; + msg.msg_iovlen = 1; + nbytes = recvmsg(sd[1], &msg, MSG_TRUNC); + ATF_REQUIRE_MSG(nbytes >= 0, "recvmsg failed: %s", strerror(errno)); + ATF_REQUIRE((size_t)nbytes == sizeof(buf)); + ATF_REQUIRE((msg.msg_flags & MSG_TRUNC) != 0); + + error = ktrace(tracepath, KTROP_CLEARFILE, 0, getpid()); + ATF_REQUIRE_MSG(error == 0, + "ktrace(CLEARFILE) failed: %s", strerror(errno)); + + nbytes = read(fd, &ktr, sizeof(ktr)); + ATF_REQUIRE_MSG(nbytes >= 0, "read failed: %s", strerror(errno)); + ATF_REQUIRE((size_t)nbytes == sizeof(ktr)); + ATF_REQUIRE((ktr.ktr_type & ~KTR_TYPE) == KTR_GENIO); + + ATF_REQUIRE(close(fd) == 0); + ATF_REQUIRE(close(sd[0]) == 0); + ATF_REQUIRE(close(sd[1]) == 0); +} + +ATF_TP_ADD_TCS(tp) +{ + ATF_TP_ADD_TC(tp, recv_trunc_afinet_udp); + ATF_TP_ADD_TC(tp, recv_trunc_afinet6_udp); + ATF_TP_ADD_TC(tp, recv_trunc_afunix_dgram); + ATF_TP_ADD_TC(tp, recvmsg_trunc_ktrace_uio); + + return (atf_no_error()); +} |