NetBSD/tests/lib/libc/sys/t_recvmmsg.c

190 lines
5.5 KiB
C

/* $NetBSD: t_recvmmsg.c,v 1.4 2018/08/21 10:39:21 christos Exp $ */
/*-
* Copyright (c) 2012 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jared McNeill and Christos Zoulas.
*
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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/cdefs.h>
__RCSID("$NetBSD: t_recvmmsg.c,v 1.4 2018/08/21 10:39:21 christos Exp $");
#include <atf-c.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/wait.h>
#include <string.h>
#include <time.h>
#include <stdint.h>
#include <errno.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sched.h>
#define BUFSIZE 65536
#define NPKTS 50
#define min(a, b) ((a) < (b) ? (a) : (b))
static int debug;
static volatile sig_atomic_t rdied;
static void
handle_sigchld(__unused int pid)
{
rdied = 1;
}
ATF_TC(recvmmsg_basic);
ATF_TC_HEAD(recvmmsg_basic, tc)
{
atf_tc_set_md_var(tc, "descr", "A basic test of recvmmsg(2)");
}
ATF_TC_BODY(recvmmsg_basic, tc)
{
int fd[2], error, i, cnt;
uint8_t *buf;
struct mmsghdr *mmsghdr;
struct iovec *iov;
unsigned int mmsgcnt, n;
int status;
off_t off;
uint8_t DGRAM[1316] = { 0, 2, 3, 4, 5, 6, 7, 8, 9, };
struct sigaction sa;
ssize_t overf = 0;
error = socketpair(AF_UNIX, SOCK_DGRAM, 0, fd);
ATF_REQUIRE_MSG(error != -1, "socketpair failed (%s)", strerror(errno));
buf = malloc(BUFSIZE);
ATF_REQUIRE_MSG(buf != NULL, "malloc failed (%s)", strerror(errno));
mmsgcnt = BUFSIZE / sizeof(DGRAM);
mmsghdr = malloc(sizeof(*mmsghdr) * mmsgcnt);
ATF_REQUIRE_MSG(mmsghdr != NULL, "malloc failed (%s)", strerror(errno));
iov = malloc(sizeof(*iov) * mmsgcnt);
ATF_REQUIRE_MSG(iov != NULL, "malloc failed (%s)", strerror(errno));
for (off = 0, n = 0; n < mmsgcnt; n++) {
iov[n].iov_base = buf + off;
iov[n].iov_len = sizeof(DGRAM);
off += iov[n].iov_len;
mmsghdr[n].msg_hdr.msg_iov = &iov[n];
mmsghdr[n].msg_hdr.msg_iovlen = 1;
mmsghdr[n].msg_hdr.msg_name = NULL;
mmsghdr[n].msg_hdr.msg_namelen = 0;
}
memset(&sa, 0, sizeof(sa));
sa.sa_flags = SA_RESTART;
sa.sa_handler = &handle_sigchld;
sigemptyset(&sa.sa_mask);
error = sigaction(SIGCHLD, &sa, 0);
ATF_REQUIRE_MSG(error != -1, "sigaction failed (%s)",
strerror(errno));
switch (fork()) {
case -1:
ATF_REQUIRE_MSG(0, "fork failed (%s)", strerror(errno));
break;
case 0:
n = NPKTS;
if (debug)
printf("waiting for %u messages (max %u per syscall)\n", n,
mmsgcnt);
while (n > 0) {
struct timespec ts = { 1, 0 };
cnt = recvmmsg(fd[1], mmsghdr, min(mmsgcnt, n),
MSG_WAITALL, &ts);
if (cnt == -1 && errno == ENOBUFS) {
overf++;
if (debug)
printf("receive buffer overflowed"
" (%zu)\n",overf);
continue;
}
ATF_REQUIRE_MSG(cnt != -1, "recvmmsg failed (%s)",
strerror(errno));
ATF_REQUIRE_MSG(cnt != 0, "recvmmsg timeout");
if (debug)
printf("recvmmsg: got %u messages\n", cnt);
for (i = 0; i < cnt; i++) {
ATF_CHECK_EQ_MSG(mmsghdr[i].msg_len,
sizeof(DGRAM), "packet length");
ATF_CHECK_EQ_MSG(
((uint8_t *)iov[i].iov_base)[0],
NPKTS - n + i, "packet contents");
}
n -= cnt;
}
if (debug)
printf("done!\n");
exit(0);
/*NOTREACHED*/
default:
sched_yield();
for (n = 0; n < NPKTS; n++) {
if (debug)
printf("sending packet %u/%u...\n", (n+1),
NPKTS);
do {
if (rdied)
break;
DGRAM[0] = n;
error = send(fd[0], DGRAM, sizeof(DGRAM), 0);
} while (error == -1 && errno == ENOBUFS);
ATF_REQUIRE_MSG(error != -1, "send failed (%s)",
strerror(errno));
}
error = wait(&status);
ATF_REQUIRE_MSG(error != -1, "wait failed (%s)",
strerror(errno));
ATF_REQUIRE_MSG(WIFEXITED(status) && WEXITSTATUS(status) == 0,
"receiver died");
break;
}
}
ATF_TP_ADD_TCS(tp)
{
ATF_TP_ADD_TC(tp, recvmmsg_basic);
return atf_no_error();
}