t_forward.c revision 1.1
1 /* $NetBSD: t_forward.c,v 1.1 2010/07/04 19:30:59 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 1.1 2010/07/04 19:30:59 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 62 static void 63 configure_interface(const char *busname, const char *addr, const char *mask, 64 const char *bcast) 65 { 66 char ifname[32]; 67 struct ifaliasreq ia; 68 struct sockaddr_in *sin; 69 int s, rv, ifnum; 70 71 if ((s = rump_pub_shmif_create(busname, &ifnum)) != 0) { 72 atf_tc_fail("rump_pub_virtif_create(%d)", s); 73 } 74 75 if ((s = rump_sys_socket(PF_INET, SOCK_DGRAM, 0)) < 0) { 76 atf_tc_fail_errno("if config socket"); 77 } 78 sprintf(ifname, "shmif%d", ifnum); 79 80 /* Address */ 81 memset(&ia, 0, sizeof(ia)); 82 strcpy(ia.ifra_name, ifname); 83 sin = (struct sockaddr_in *)&ia.ifra_addr; 84 sin->sin_family = AF_INET; 85 sin->sin_len = sizeof(struct sockaddr_in); 86 sin->sin_addr.s_addr = inet_addr(addr); 87 88 /* Netmask */ 89 sin = (struct sockaddr_in *)&ia.ifra_mask; 90 sin->sin_family = AF_INET; 91 sin->sin_len = sizeof(struct sockaddr_in); 92 sin->sin_addr.s_addr = inet_addr(mask); 93 94 /* Broadcast address */ 95 sin = (struct sockaddr_in *)&ia.ifra_broadaddr; 96 sin->sin_family = AF_INET; 97 sin->sin_len = sizeof(struct sockaddr_in); 98 sin->sin_addr.s_addr = inet_addr(bcast); 99 100 rv = rump_sys_ioctl(s, SIOCAIFADDR, &ia); 101 if (rv) { 102 atf_tc_fail_errno("SIOCAIFADDR"); 103 } 104 rump_sys_close(s); 105 } 106 107 static void 108 configure_routing(const char *dst, const char *mask, const char *gw) 109 { 110 size_t len; 111 struct { 112 struct rt_msghdr m_rtm; 113 uint8_t m_space[512]; 114 } m_rtmsg; 115 #define rtm m_rtmsg.m_rtm 116 uint8_t *bp = m_rtmsg.m_space; 117 struct sockaddr_in sinstore; 118 int s, rv; 119 120 s = rump_sys_socket(PF_ROUTE, SOCK_RAW, 0); 121 if (s == -1) { 122 atf_tc_fail_errno("routing socket"); 123 } 124 125 memset(&m_rtmsg, 0, sizeof(m_rtmsg)); 126 rtm.rtm_type = RTM_ADD; 127 rtm.rtm_flags = RTF_UP | RTF_GATEWAY | RTF_STATIC; 128 rtm.rtm_version = RTM_VERSION; 129 rtm.rtm_seq = 2; 130 rtm.rtm_addrs = RTA_DST | RTA_GATEWAY | RTA_NETMASK; 131 132 /* dst */ 133 memset(&sinstore, 0, sizeof(sinstore)); 134 sinstore.sin_family = AF_INET; 135 sinstore.sin_len = sizeof(sinstore); 136 sinstore.sin_addr.s_addr = inet_addr(dst); 137 memcpy(bp, &sinstore, sizeof(sinstore)); 138 bp += sizeof(sinstore); 139 140 /* gw */ 141 memset(&sinstore, 0, sizeof(sinstore)); 142 sinstore.sin_family = AF_INET; 143 sinstore.sin_len = sizeof(sinstore); 144 sinstore.sin_addr.s_addr = inet_addr(gw); 145 memcpy(bp, &sinstore, sizeof(sinstore)); 146 bp += sizeof(sinstore); 147 148 /* netmask */ 149 memset(&sinstore, 0, sizeof(sinstore)); 150 sinstore.sin_family = AF_INET; 151 sinstore.sin_len = sizeof(sinstore); 152 sinstore.sin_addr.s_addr = inet_addr(mask); 153 memcpy(bp, &sinstore, sizeof(sinstore)); 154 bp += sizeof(sinstore); 155 156 len = bp - (uint8_t *)&m_rtmsg; 157 rtm.rtm_msglen = len; 158 159 rv = rump_sys_write(s, &m_rtmsg, len); 160 if (rv != (int)len) { 161 atf_tc_fail_errno("write routing message"); 162 } 163 rump_sys_close(s); 164 } 165 166 /* 167 * Since our maxttl is in our private namespace, we don't need raw packet 168 * construction like traceroute(8) -- we can just use the global maxttl. 169 */ 170 static void 171 sendttl(void) 172 { 173 extern int rumpns_ip_defttl; 174 struct sockaddr_in sin; 175 char payload[1024]; 176 int mib[4] = { CTL_NET, PF_INET, IPPROTO_IP, IPCTL_DEFTTL }; 177 int nv; 178 int s; 179 180 configure_interface("bus1", "1.0.0.1", "255.255.255.0", "1.0.0.255"); 181 configure_routing("0.0.0.0", "0.0.0.0", "1.0.0.2"); /* default router */ 182 183 /* set global ttl to 1 */ 184 nv = 1; 185 if (rump_sys___sysctl(mib, 4, NULL, NULL, &nv, sizeof(nv)) == -1) 186 atf_tc_fail_errno("set ttl"); 187 188 s = rump_sys_socket(PF_INET, SOCK_DGRAM, 0); 189 if (s == -1) 190 atf_tc_fail_errno("create send socket"); 191 192 memset(&sin, 0, sizeof(sin)); 193 sin.sin_len = sizeof(sin); 194 sin.sin_family = AF_INET; 195 sin.sin_port = htons(33434); 196 sin.sin_addr.s_addr = inet_addr("9.9.9.9"); 197 198 /* send udp datagram with ttl == 1 */ 199 if (rump_sys_sendto(s, payload, sizeof(payload), 0, 200 (struct sockaddr *)&sin, sizeof(sin)) == -1) 201 atf_tc_fail_errno("sendto"); 202 } 203 204 static void 205 router(void) 206 { 207 int mib[4] = { CTL_NET, PF_INET, IPPROTO_ICMP, 208 ICMPCTL_RETURNDATABYTES }; 209 int nv; 210 211 /* set returndatabytes to 200 */ 212 nv = 200; 213 if (rump_sys___sysctl(mib, 4, NULL, NULL, &nv, sizeof(nv)) == -1) 214 atf_tc_fail_errno("sysctl returndatabytes"); 215 216 configure_interface("bus1", "1.0.0.2", "255.255.255.0", "1.0.0.255"); 217 218 /* 219 * Wait for parent to send us the data and for us to have 220 * a chance to process it. 221 */ 222 sleep(1); 223 exit(0); 224 } 225 226 ATF_TC(returndatabytes); 227 ATF_TC_HEAD(returndatabytes, tc) 228 { 229 230 atf_tc_set_md_var(tc, "descr", "icmp.returndatabytes with certain " 231 "packets can cause kernel panic"); 232 atf_tc_set_md_var(tc, "use.fs", "true"); 233 atf_tc_set_md_var(tc, "timeout", "4"); /* just in case */ 234 /* PR kern/43548 */ 235 } 236 237 ATF_TC_BODY(returndatabytes, tc) 238 { 239 pid_t cpid; 240 int status; 241 242 cpid = fork(); 243 rump_init(); 244 245 switch (cpid) { 246 case -1: 247 atf_tc_fail_errno("fork failed"); 248 case 0: 249 router(); 250 break; 251 default: 252 sendttl(); 253 if (wait(&status) == -1) 254 atf_tc_fail_errno("wait"); 255 if (WIFEXITED(status)) { 256 if (WEXITSTATUS(status)) 257 atf_tc_fail("child exited with status %d", 258 WEXITSTATUS(status)); 259 } else { 260 atf_tc_fail("child died"); 261 } 262 } 263 } 264 265 ATF_TP_ADD_TCS(tp) 266 { 267 268 ATF_TP_ADD_TC(tp, returndatabytes); 269 270 return atf_no_error(); 271 } 272
Indexes created Thu Oct 02 10:09:58 GMT 2025