1 /* $NetBSD: t_forward.c,v 1.5 2010/07/26 14:10:31 pooka 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 1.5 2010/07/26 14:10:31 pooka 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 extern int rumpns_ip_defttl; 71 struct sockaddr_in sin; 72 char payload[1024]; 73 char ifname[IFNAMSIZ]; 74 int mib[4] = { CTL_NET, PF_INET, IPPROTO_IP, IPCTL_DEFTTL }; 75 int nv; 76 int s; 77 78 netcfg_rump_makeshmif("bus1", ifname); 79 netcfg_rump_if(ifname, "1.0.0.1", "255.255.255.0"); 80 netcfg_rump_route("0.0.0.0", "0.0.0.0", "1.0.0.2"); /* default router */ 81 82 /* set global ttl to 1 */ 83 nv = 1; 84 if (rump_sys___sysctl(mib, 4, NULL, NULL, &nv, sizeof(nv)) == -1) 85 atf_tc_fail_errno("set ttl"); 86 87 s = rump_sys_socket(PF_INET, SOCK_DGRAM, 0); 88 if (s == -1) 89 atf_tc_fail_errno("create send socket"); 90 91 memset(&sin, 0, sizeof(sin)); 92 sin.sin_len = sizeof(sin); 93 sin.sin_family = AF_INET; 94 sin.sin_port = htons(33434); 95 sin.sin_addr.s_addr = inet_addr("9.9.9.9"); 96 97 /* send udp datagram with ttl == 1 */ 98 if (rump_sys_sendto(s, payload, sizeof(payload), 0, 99 (struct sockaddr *)&sin, sizeof(sin)) == -1) 100 atf_tc_fail_errno("sendto"); 101 } 102 103 static void 104 router(void) 105 { 106 int mib[4] = { CTL_NET, PF_INET, IPPROTO_ICMP, 107 ICMPCTL_RETURNDATABYTES }; 108 char ifname[IFNAMSIZ]; 109 int nv; 110 111 /* set returndatabytes to 200 */ 112 nv = 200; 113 if (rump_sys___sysctl(mib, 4, NULL, NULL, &nv, sizeof(nv)) == -1) 114 atf_tc_fail_errno("sysctl returndatabytes"); 115 116 netcfg_rump_makeshmif("bus1", ifname); 117 netcfg_rump_if(ifname, "1.0.0.2", "255.255.255.0"); 118 119 /* 120 * Wait for parent to send us the data and for us to have 121 * a chance to process it. 122 */ 123 sleep(1); 124 exit(0); 125 } 126 127 ATF_TC(returndatabytes); 128 ATF_TC_HEAD(returndatabytes, tc) 129 { 130 131 atf_tc_set_md_var(tc, "descr", "icmp.returndatabytes with certain " 132 "packets can cause kernel panic"); 133 atf_tc_set_md_var(tc, "use.fs", "true"); 134 atf_tc_set_md_var(tc, "timeout", "4"); /* just in case */ 135 /* PR kern/43548 */ 136 } 137 138 ATF_TC_BODY(returndatabytes, tc) 139 { 140 pid_t cpid; 141 int status; 142 143 cpid = fork(); 144 rump_init(); 145 146 switch (cpid) { 147 case -1: 148 atf_tc_fail_errno("fork failed"); 149 case 0: 150 router(); 151 break; 152 default: 153 sendttl(); 154 if (wait(&status) == -1) 155 atf_tc_fail_errno("wait"); 156 if (WIFEXITED(status)) { 157 if (WEXITSTATUS(status)) 158 atf_tc_fail("child exited with status %d", 159 WEXITSTATUS(status)); 160 } else { 161 atf_tc_fail("child died"); 162 } 163 } 164 } 165 166 ATF_TP_ADD_TCS(tp) 167 { 168 169 ATF_TP_ADD_TC(tp, returndatabytes); 170 171 return atf_no_error(); 172 } 173