tests/net/icmp/t_forward.c

   1 /*      $NetBSD: t_forward.c,v 1.9 2015/02/26 13:03:21 martin Exp $     */
   2
   3 /*-
   4  * Copyright (c) 2010 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND
  17  * CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
  18  * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  19  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20  * IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY
  21  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
  23  * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  24  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
  25  * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  26  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
  27  * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28  */
  29
  30 #include <sys/cdefs.h>
  31 #ifndef lint
  32 __RCSID("$NetBSD: t_forward.c,v 1.9 2015/02/26 13:03:21 martin Exp $");
  33 #endif /* not lint */
  34
  35 #include <sys/types.h>
  36 #include <sys/socket.h>
  37 #include <sys/time.h>
  38 #include <sys/sysctl.h>
  39 #include <sys/wait.h>
  40
  41 #include <arpa/inet.h>
  42
  43 #include <netinet/in.h>
  44 #include <netinet/in_systm.h>
  45 #include <netinet/ip.h>
  46 #include <netinet/ip_icmp.h>
  47 #include <netinet/icmp_var.h>
  48 #include <net/route.h>
  49
  50 #include <rump/rump.h>
  51 #include <rump/rump_syscalls.h>
  52
  53 #include <atf-c.h>
  54 #include <errno.h>
  55 #include <stdio.h>
  56 #include <stdlib.h>
  57 #include <string.h>
  58 #include <unistd.h>
  59
  60 #include "../../h_macros.h"
  61 #include "../config/netconfig.c"
  62
  63 /*
  64  * Since our maxttl is in our private namespace, we don't need raw packet
  65  * construction like traceroute(8) -- we can just use the global maxttl.
  66  */
  67 static void
  68 sendttl(void)
  69 {
  70         struct sockaddr_in sin;
  71         char payload[1024];
  72         char ifname[IFNAMSIZ];
  73         int mib[4] = { CTL_NET, PF_INET, IPPROTO_IP, IPCTL_DEFTTL };
  74         int nv;
  75         int s;
  76
  77         netcfg_rump_makeshmif("bus1", ifname);
  78         netcfg_rump_if(ifname, "1.0.0.1", "255.255.255.0");
  79         netcfg_rump_route("0.0.0.0", "0.0.0.0", "1.0.0.2"); /* default router */
  80
  81         /* set global ttl to 1 */
  82         nv = 1;
  83         if (rump_sys___sysctl(mib, 4, NULL, NULL, &nv, sizeof(nv)) == -1)
  84                 atf_tc_fail_errno("set ttl");
  85
  86         s = rump_sys_socket(PF_INET, SOCK_DGRAM, 0);
  87         if (s == -1)
  88                 atf_tc_fail_errno("create send socket");
  89
  90         memset(&sin, 0, sizeof(sin));
  91         sin.sin_len = sizeof(sin);
  92         sin.sin_family = AF_INET;
  93         sin.sin_port = htons(33434);
  94         sin.sin_addr.s_addr = inet_addr("9.9.9.9");
  95
  96         /* send udp datagram with ttl == 1 */
  97         if (rump_sys_sendto(s, payload, sizeof(payload), 0,
  98             (struct sockaddr *)&sin, sizeof(sin)) == -1)
  99                 atf_tc_fail_errno("sendto");
 100 }
 101
 102 static void
 103 router(void)
 104 {
 105         int mib[4] = { CTL_NET, PF_INET, IPPROTO_ICMP,
 106                     ICMPCTL_RETURNDATABYTES };
 107         char ifname[IFNAMSIZ];
 108         int nv;
 109
 110         /* set returndatabytes to 200 */
 111         nv = 200;
 112         if (rump_sys___sysctl(mib, 4, NULL, NULL, &nv, sizeof(nv)) == -1)
 113                 atf_tc_fail_errno("sysctl returndatabytes");
 114
 115         netcfg_rump_makeshmif("bus1", ifname);
 116         netcfg_rump_if(ifname, "1.0.0.2", "255.255.255.0");
 117
 118         /*
 119          * Wait for parent to send us the data and for us to have
 120          * a chance to process it.
 121          */
 122         sleep(1);
 123         exit(0);
 124 }
 125
 126 ATF_TC(returndatabytes);
 127 ATF_TC_HEAD(returndatabytes, tc)
 128 {
 129
 130         atf_tc_set_md_var(tc, "descr", "icmp.returndatabytes with certain "
 131             "packets can cause kernel panic (PR kern/43548)");
 132         atf_tc_set_md_var(tc, "timeout", "20"); /* just in case */
 133 }
 134
 135 ATF_TC_BODY(returndatabytes, tc)
 136 {
 137         pid_t cpid;
 138         int status;
 139
 140         cpid = fork();
 141         rump_init();
 142
 143         switch (cpid) {
 144         case -1:
 145                 atf_tc_fail_errno("fork failed");
 146         case 0:
 147                 router();
 148                 break;
 149         default:
 150                 sendttl();
 151                 if (wait(&status) == -1)
 152                         atf_tc_fail_errno("wait");
 153                 if (WIFEXITED(status)) {
 154                         if (WEXITSTATUS(status))
 155                                 atf_tc_fail("child exited with status %d",
 156                                     WEXITSTATUS(status));
 157                 } else {
 158                         atf_tc_fail("child died");
 159                 }
 160         }
 161 }
 162
 163 ATF_TP_ADD_TCS(tp)
 164 {
 165
 166         ATF_TP_ADD_TC(tp, returndatabytes);
 167
 168         return atf_no_error();
 169 }