1 /* $NetBSD: t_forward.c,v 1.8 2012/03/18 09:46:50 jruoho 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 1.8 2012/03/18 09:46:50 jruoho 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", "4"); /* 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 } 170