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tests/netinet: add UDP socket I/O tests
Start a file that would collect tests for I/O functionality of a UDP socket, targeted on how a socket interacts with userland rather than with wire side of the protocol. First version tests that MSG_TRUNC and MSG_PEEK are working correctly.
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@ -12,7 +12,8 @@ ATF_TESTS_C= ip_reass_test \
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socket_afinet \
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tcp_connect_port_test \
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tcp_implied_connect \
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tcp_md5_getsockopt
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tcp_md5_getsockopt \
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udp_io
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ATF_TESTS_SH= arp \
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carp \
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139
tests/sys/netinet/udp_io.c
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139
tests/sys/netinet/udp_io.c
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@ -0,0 +1,139 @@
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/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2024 Gleb Smirnoff <glebius@FreeBSD.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <errno.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <atf-c.h>
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/*
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* Create a pair of UDP sockets. The first one is bound to a local
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* address and the second one is connected to it.
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*/
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static void
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udp_socketpair(int *s)
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{
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struct sockaddr_in sin = {
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.sin_family = AF_INET,
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.sin_len = sizeof(sin),
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};
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socklen_t slen = sizeof(sin);
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int b, c;
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ATF_REQUIRE((b = socket(PF_INET, SOCK_DGRAM, 0)) > 0);
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ATF_REQUIRE((c = socket(PF_INET, SOCK_DGRAM, 0)) > 0);
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ATF_REQUIRE(bind(b, (struct sockaddr *)&sin, sizeof(sin)) == 0);
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ATF_REQUIRE(getsockname(b, (struct sockaddr *)&sin, &slen) == 0);
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ATF_REQUIRE(connect(c, (struct sockaddr *)&sin, sizeof(sin)) == 0);
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s[0] = b;
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s[1] = c;
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}
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/*
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* Check MSG_TRUNC.
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*/
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ATF_TC_WITHOUT_HEAD(trunc);
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ATF_TC_BODY(trunc, tc)
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{
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char sbuf[] = "Hello, peer!", rbuf[sizeof(sbuf)];
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struct iovec iov = {
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.iov_base = sbuf,
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.iov_len = sizeof(sbuf),
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};
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struct msghdr msg = {
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.msg_iov = &iov,
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.msg_iovlen = 1,
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};
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int s[2];
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u_int n;
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udp_socketpair(s);
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ATF_REQUIRE(sendmsg(s[1], &msg, 0) == sizeof(sbuf));
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n = (arc4random() % (sizeof(sbuf) - 1)) + 1;
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iov.iov_base = rbuf;
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iov.iov_len = n;
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ATF_REQUIRE(recvmsg(s[0], &msg, 0) == n);
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ATF_REQUIRE(msg.msg_flags == MSG_TRUNC);
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ATF_REQUIRE(strncmp(sbuf, rbuf, n) == 0);
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iov.iov_len = sizeof(rbuf);
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ATF_REQUIRE(recvmsg(s[0], &msg, MSG_DONTWAIT) == -1);
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ATF_REQUIRE(errno == EAGAIN);
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close(s[0]);
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close(s[1]);
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}
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/*
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* Check MSG_PEEK.
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*/
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ATF_TC_WITHOUT_HEAD(peek);
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ATF_TC_BODY(peek, tc)
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{
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char sbuf[] = "Hello, peer!", rbuf[sizeof(sbuf)];
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struct iovec iov = {
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.iov_base = sbuf,
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.iov_len = sizeof(sbuf),
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};
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struct msghdr msg = {
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.msg_iov = &iov,
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.msg_iovlen = 1,
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};
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int s[2];
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u_int n;
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udp_socketpair(s);
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ATF_REQUIRE(sendmsg(s[1], &msg, 0) == sizeof(sbuf));
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iov.iov_base = rbuf;
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for (int i = 0; i < 10; i++) {
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n = (arc4random() % sizeof(sbuf)) + 1;
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iov.iov_len = n;
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ATF_REQUIRE(recvmsg(s[0], &msg, MSG_PEEK) == n);
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if (n < sizeof(sbuf))
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ATF_REQUIRE(msg.msg_flags == (MSG_PEEK | MSG_TRUNC));
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else
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ATF_REQUIRE(msg.msg_flags == MSG_PEEK);
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ATF_REQUIRE(strncmp(sbuf, rbuf, n) == 0);
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}
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close(s[0]);
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close(s[1]);
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}
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ATF_TP_ADD_TCS(tp)
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{
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ATF_TP_ADD_TC(tp, trunc);
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ATF_TP_ADD_TC(tp, peek);
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return (atf_no_error());
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}
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