1/*	$NetBSD: t_recvmmsg.c,v 1.4 2018/08/21 10:39:21 christos Exp $	*/
2
3/*-
4 * Copyright (c) 2012 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Jared McNeill and Christos Zoulas.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 *    must display the following acknowledgement:
20 *        This product includes software developed by the NetBSD
21 *        Foundation, Inc. and its contributors.
22 * 4. Neither the name of The NetBSD Foundation nor the names of its
23 *    contributors may be used to endorse or promote products derived
24 *    from this software without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
29 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
36 * POSSIBILITY OF SUCH DAMAGE.
37 */
38#include <sys/cdefs.h>
39__RCSID("$NetBSD: t_recvmmsg.c,v 1.4 2018/08/21 10:39:21 christos Exp $");
40
41#include <atf-c.h>
42#include <sys/types.h>
43#include <sys/socket.h>
44#include <sys/wait.h>
45
46#include <string.h>
47#include <time.h>
48#include <stdint.h>
49#include <errno.h>
50#include <signal.h>
51#include <stdio.h>
52#include <stdlib.h>
53#include <unistd.h>
54#include <sched.h>
55
56#define BUFSIZE	65536
57#define NPKTS	50
58
59#define min(a, b) ((a) < (b) ? (a) : (b))
60static int debug;
61static volatile sig_atomic_t rdied;
62
63static void
64handle_sigchld(__unused int pid)
65{
66
67	rdied = 1;
68}
69
70ATF_TC(recvmmsg_basic);
71ATF_TC_HEAD(recvmmsg_basic, tc)
72{
73	atf_tc_set_md_var(tc, "descr", "A basic test of recvmmsg(2)");
74}
75
76ATF_TC_BODY(recvmmsg_basic, tc)
77{
78	int fd[2], error, i, cnt;
79	uint8_t *buf;
80	struct mmsghdr *mmsghdr;
81	struct iovec *iov;
82	unsigned int mmsgcnt, n;
83	int status;
84	off_t off;
85	uint8_t DGRAM[1316] = { 0, 2, 3, 4, 5, 6, 7, 8, 9, };
86	struct sigaction sa;
87	ssize_t overf = 0;
88
89	error = socketpair(AF_UNIX, SOCK_DGRAM, 0, fd);
90	ATF_REQUIRE_MSG(error != -1, "socketpair failed (%s)", strerror(errno));
91
92	buf = malloc(BUFSIZE);
93	ATF_REQUIRE_MSG(buf != NULL, "malloc failed (%s)", strerror(errno));
94
95	mmsgcnt = BUFSIZE / sizeof(DGRAM);
96	mmsghdr = malloc(sizeof(*mmsghdr) * mmsgcnt);
97	ATF_REQUIRE_MSG(mmsghdr != NULL, "malloc failed (%s)", strerror(errno));
98	iov = malloc(sizeof(*iov) * mmsgcnt);
99	ATF_REQUIRE_MSG(iov != NULL, "malloc failed (%s)", strerror(errno));
100
101	for (off = 0, n = 0; n < mmsgcnt; n++) {
102		iov[n].iov_base = buf + off;
103		iov[n].iov_len = sizeof(DGRAM);
104		off += iov[n].iov_len;
105		mmsghdr[n].msg_hdr.msg_iov = &iov[n];
106		mmsghdr[n].msg_hdr.msg_iovlen = 1;
107		mmsghdr[n].msg_hdr.msg_name = NULL;
108		mmsghdr[n].msg_hdr.msg_namelen = 0;
109	}
110
111	memset(&sa, 0, sizeof(sa));
112	sa.sa_flags = SA_RESTART;
113	sa.sa_handler = &handle_sigchld;
114	sigemptyset(&sa.sa_mask);
115	error = sigaction(SIGCHLD, &sa, 0);
116	ATF_REQUIRE_MSG(error != -1, "sigaction failed (%s)",
117	    strerror(errno));
118
119	switch (fork()) {
120	case -1:
121		ATF_REQUIRE_MSG(0, "fork failed (%s)", strerror(errno));
122		break;
123
124	case 0:
125		n = NPKTS;
126		if (debug)
127		    printf("waiting for %u messages (max %u per syscall)\n", n,
128			mmsgcnt);
129		while (n > 0) {
130			struct timespec ts = { 1, 0 };
131			cnt = recvmmsg(fd[1], mmsghdr, min(mmsgcnt, n),
132			    MSG_WAITALL, &ts);
133			if (cnt == -1 && errno == ENOBUFS) {
134				overf++;
135				if (debug)
136					printf("receive buffer overflowed"
137					    " (%zu)\n",overf);
138				continue;
139			}
140			ATF_REQUIRE_MSG(cnt != -1, "recvmmsg failed (%s)",
141			    strerror(errno));
142			ATF_REQUIRE_MSG(cnt != 0, "recvmmsg timeout");
143			if (debug)
144				printf("recvmmsg: got %u messages\n", cnt);
145			for (i = 0; i < cnt; i++) {
146				ATF_CHECK_EQ_MSG(mmsghdr[i].msg_len,
147				    sizeof(DGRAM), "packet length");
148				ATF_CHECK_EQ_MSG(
149				    ((uint8_t *)iov[i].iov_base)[0],
150				    NPKTS - n + i, "packet contents");
151			}
152			n -= cnt;
153		}
154		if (debug)
155			printf("done!\n");
156		exit(0);
157		/*NOTREACHED*/
158	default:
159		sched_yield();
160
161		for (n = 0; n < NPKTS; n++) {
162			if (debug)
163				printf("sending packet %u/%u...\n", (n+1),
164				    NPKTS);
165			do {
166				if (rdied)
167					break;
168				DGRAM[0] = n;
169				error = send(fd[0], DGRAM, sizeof(DGRAM), 0);
170			} while (error == -1 && errno == ENOBUFS);
171			ATF_REQUIRE_MSG(error != -1, "send failed (%s)",
172			    strerror(errno));
173		}
174		error = wait(&status);
175		ATF_REQUIRE_MSG(error != -1, "wait failed (%s)",
176		    strerror(errno));
177		ATF_REQUIRE_MSG(WIFEXITED(status) && WEXITSTATUS(status) == 0,
178		    "receiver died");
179		break;
180	}
181}
182
183ATF_TP_ADD_TCS(tp)
184{
185
186	ATF_TP_ADD_TC(tp, recvmmsg_basic);
187
188	return atf_no_error();
189}
190