tests/lib/libc/sys/t_recvmmsg.c

   1 /*      $NetBSD: t_recvmmsg.c,v 1.1 2012/06/22 18:45:23 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 1.1 2012/06/22 18:45:23 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 <stdio.h>
  51 #include <stdlib.h>
  52 #include <unistd.h>
  53 #include <sched.h>
  54
  55 #define BUFSIZE 65536
  56 #define NPKTS   50
  57
  58 #define min(a, b) ((a) < (b) ? (a) : (b))
  59 static int debug;
  60
  61
  62 ATF_TC(recvmmsg_basic);
  63 ATF_TC_HEAD(recvmmsg_basic, tc)
  64 {
  65         atf_tc_set_md_var(tc, "descr", "A basic test of recvmmsg(2)");
  66 }
  67
  68 ATF_TC_BODY(recvmmsg_basic, tc)
  69 {
  70         int fd[2], error, i, cnt;
  71         uint8_t *buf;
  72         struct mmsghdr *mmsghdr;
  73         struct iovec *iov;
  74         unsigned int mmsgcnt, n;
  75         int status;
  76         off_t off;
  77         uint8_t DGRAM[1316] = { 0, 2, 3, 4, 5, 6, 7, 8, 9, };
  78
  79         error = socketpair(AF_UNIX, SOCK_DGRAM, 0, fd);
  80         ATF_REQUIRE_MSG(error != -1, "socketpair failed (%s)", strerror(errno));
  81
  82         buf = malloc(BUFSIZE);
  83         ATF_REQUIRE_MSG(buf != NULL, "malloc failed (%s)", strerror(errno));
  84
  85         mmsgcnt = BUFSIZE / sizeof(DGRAM);
  86         mmsghdr = malloc(sizeof(*mmsghdr) * mmsgcnt);
  87         ATF_REQUIRE_MSG(mmsghdr != NULL, "malloc failed (%s)", strerror(errno));
  88         iov = malloc(sizeof(*iov) * mmsgcnt);
  89         ATF_REQUIRE_MSG(iov != NULL, "malloc failed (%s)", strerror(errno));
  90
  91         for (off = 0, n = 0; n < mmsgcnt; n++) {
  92                 iov[n].iov_base = buf + off;
  93                 iov[n].iov_len = sizeof(DGRAM);
  94                 off += iov[n].iov_len;
  95                 mmsghdr[n].msg_hdr.msg_iov = &iov[n];
  96                 mmsghdr[n].msg_hdr.msg_iovlen = 1;
  97                 mmsghdr[n].msg_hdr.msg_name = NULL;
  98                 mmsghdr[n].msg_hdr.msg_namelen = 0;
  99         }
 100
 101         switch (fork()) {
 102         case -1:
 103                 ATF_REQUIRE_MSG(0, "fork failed (%s)", strerror(errno));
 104                 break;
 105
 106         case 0:
 107                 n = NPKTS;
 108                 if (debug)
 109                     printf("waiting for %u messages (max %u per syscall)\n", n,
 110                         mmsgcnt);
 111                 while (n > 0) {
 112                         struct timespec ts = { 1, 0 };
 113                         cnt = recvmmsg(fd[1], mmsghdr, min(mmsgcnt, n),
 114                             MSG_WAITALL, &ts);
 115                         ATF_REQUIRE_MSG(cnt != -1, "recvmmsg failed (%s)",
 116                             strerror(errno));
 117                         ATF_REQUIRE_MSG(cnt != 0, "recvmmsg timeout");
 118                         if (debug)
 119                                 printf("recvmmsg: got %u messages\n", cnt);
 120                         for (i = 0; i < cnt; i++) {
 121                                 ATF_CHECK_EQ_MSG(mmsghdr[i].msg_len,
 122                                     sizeof(DGRAM), "packet length");
 123                                 ATF_CHECK_EQ_MSG(
 124                                     ((uint8_t *)iov[i].iov_base)[0],
 125                                     NPKTS - n + i, "packet contents");
 126                         }
 127                         n -= cnt;
 128                 }
 129                 if (debug)
 130                         printf("done!\n");
 131                 exit(0);
 132                 /*NOTREACHED*/
 133         default:
 134                 sched_yield();
 135
 136                 for (n = 0; n < NPKTS; n++) {
 137                         if (debug)
 138                                 printf("sending packet %u/%u...\n", (n+1),
 139                                     NPKTS);
 140                         do {
 141                                 DGRAM[0] = n;
 142                                 error = send(fd[0], DGRAM, sizeof(DGRAM), 0);
 143                         } while (error == -1 && errno == ENOBUFS);
 144                         if (error == -1)
 145                                 ATF_REQUIRE_MSG(error != -1, "send failed (%s)",
 146                                     strerror(errno));
 147                 }
 148                 error = wait(&status);
 149                 ATF_REQUIRE_MSG(error != -1, "wait failed (%s)",
 150                     strerror(errno));
 151                 break;
 152         }
 153 }
 154
 155 ATF_TP_ADD_TCS(tp)
 156 {
 157
 158         ATF_TP_ADD_TC(tp, recvmmsg_basic);
 159
 160         return atf_no_error();
 161 }