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))
60 static int debug;
61 static volatile sig_atomic_t rdied;
62
63 static void
handle_sigchld(__unused int pid)64 handle_sigchld(__unused int pid)
65 {
66
67 rdied = 1;
68 }
69
70 ATF_TC(recvmmsg_basic);
ATF_TC_HEAD(recvmmsg_basic,tc)71 ATF_TC_HEAD(recvmmsg_basic, tc)
72 {
73 atf_tc_set_md_var(tc, "descr", "A basic test of recvmmsg(2)");
74 }
75
ATF_TC_BODY(recvmmsg_basic,tc)76 ATF_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
ATF_TP_ADD_TCS(tp)183 ATF_TP_ADD_TCS(tp)
184 {
185
186 ATF_TP_ADD_TC(tp, recvmmsg_basic);
187
188 return atf_no_error();
189 }
190