t_forward.c revision 1.4
1 /* $NetBSD: t_forward.c,v 1.4 2010/07/26 14:07:04 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 1.4 2010/07/26 14:07:04 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 static void 64 configure_interface(const char *busname, const char *addr, const char *mask, 65 const char *bcast) 66 { 67 char ifname[32]; 68 struct ifaliasreq ia; 69 struct sockaddr_in *sin; 70 int s, rv, ifnum; 71 72 if ((s = rump_pub_shmif_create(busname, &ifnum)) != 0) { 73 atf_tc_fail("rump_pub_shmif_create(%d)", s); 74 } 75 76 if ((s = rump_sys_socket(PF_INET, SOCK_DGRAM, 0)) < 0) { 77 atf_tc_fail_errno("if config socket"); 78 } 79 sprintf(ifname, "shmif%d", ifnum); 80 81 /* Address */ 82 memset(&ia, 0, sizeof(ia)); 83 strcpy(ia.ifra_name, ifname); 84 sin = (struct sockaddr_in *)&ia.ifra_addr; 85 sin->sin_family = AF_INET; 86 sin->sin_len = sizeof(struct sockaddr_in); 87 sin->sin_addr.s_addr = inet_addr(addr); 88 89 /* Netmask */ 90 sin = (struct sockaddr_in *)&ia.ifra_mask; 91 sin->sin_family = AF_INET; 92 sin->sin_len = sizeof(struct sockaddr_in); 93 sin->sin_addr.s_addr = inet_addr(mask); 94 95 /* Broadcast address */ 96 sin = (struct sockaddr_in *)&ia.ifra_broadaddr; 97 sin->sin_family = AF_INET; 98 sin->sin_len = sizeof(struct sockaddr_in); 99 sin->sin_addr.s_addr = inet_addr(bcast); 100 101 rv = rump_sys_ioctl(s, SIOCAIFADDR, &ia); 102 if (rv) { 103 atf_tc_fail_errno("SIOCAIFADDR"); 104 } 105 rump_sys_close(s); 106 } 107 108 static void 109 configure_routing(const char *dst, const char *mask, const char *gw) 110 { 111 size_t len; 112 struct { 113 struct rt_msghdr m_rtm; 114 uint8_t m_space[512]; 115 } m_rtmsg; 116 #define rtm m_rtmsg.m_rtm 117 uint8_t *bp = m_rtmsg.m_space; 118 struct sockaddr_in sinstore; 119 int s, rv; 120 121 s = rump_sys_socket(PF_ROUTE, SOCK_RAW, 0); 122 if (s == -1) { 123 atf_tc_fail_errno("routing socket"); 124 } 125 126 memset(&m_rtmsg, 0, sizeof(m_rtmsg)); 127 rtm.rtm_type = RTM_ADD; 128 rtm.rtm_flags = RTF_UP | RTF_GATEWAY | RTF_STATIC; 129 rtm.rtm_version = RTM_VERSION; 130 rtm.rtm_seq = 2; 131 rtm.rtm_addrs = RTA_DST | RTA_GATEWAY | RTA_NETMASK; 132 133 /* dst */ 134 memset(&sinstore, 0, sizeof(sinstore)); 135 sinstore.sin_family = AF_INET; 136 sinstore.sin_len = sizeof(sinstore); 137 sinstore.sin_addr.s_addr = inet_addr(dst); 138 memcpy(bp, &sinstore, sizeof(sinstore)); 139 bp += sizeof(sinstore); 140 141 /* gw */ 142 memset(&sinstore, 0, sizeof(sinstore)); 143 sinstore.sin_family = AF_INET; 144 sinstore.sin_len = sizeof(sinstore); 145 sinstore.sin_addr.s_addr = inet_addr(gw); 146 memcpy(bp, &sinstore, sizeof(sinstore)); 147 bp += sizeof(sinstore); 148 149 /* netmask */ 150 memset(&sinstore, 0, sizeof(sinstore)); 151 sinstore.sin_family = AF_INET; 152 sinstore.sin_len = sizeof(sinstore); 153 sinstore.sin_addr.s_addr = inet_addr(mask); 154 memcpy(bp, &sinstore, sizeof(sinstore)); 155 bp += sizeof(sinstore); 156 157 len = bp - (uint8_t *)&m_rtmsg; 158 rtm.rtm_msglen = len; 159 160 rv = rump_sys_write(s, &m_rtmsg, len); 161 if (rv != (int)len) { 162 atf_tc_fail_errno("write routing message"); 163 } 164 rump_sys_close(s); 165 } 166 167 /* 168 * Since our maxttl is in our private namespace, we don't need raw packet 169 * construction like traceroute(8) -- we can just use the global maxttl. 170 */ 171 static void 172 sendttl(void) 173 { 174 extern int rumpns_ip_defttl; 175 struct sockaddr_in sin; 176 char payload[1024]; 177 char ifname[IFNAMSIZ]; 178 int mib[4] = { CTL_NET, PF_INET, IPPROTO_IP, IPCTL_DEFTTL }; 179 int nv; 180 int s; 181 182 netcfg_rump_makeshmif("bus1", ifname); 183 netcfg_rump_if(ifname, "1.0.0.1", "255.255.255.0"); 184 netcfg_rump_route("0.0.0.0", "0.0.0.0", "1.0.0.2"); /* default router */ 185 186 /* set global ttl to 1 */ 187 nv = 1; 188 if (rump_sys___sysctl(mib, 4, NULL, NULL, &nv, sizeof(nv)) == -1) 189 atf_tc_fail_errno("set ttl"); 190 191 s = rump_sys_socket(PF_INET, SOCK_DGRAM, 0); 192 if (s == -1) 193 atf_tc_fail_errno("create send socket"); 194 195 memset(&sin, 0, sizeof(sin)); 196 sin.sin_len = sizeof(sin); 197 sin.sin_family = AF_INET; 198 sin.sin_port = htons(33434); 199 sin.sin_addr.s_addr = inet_addr("9.9.9.9"); 200 201 /* send udp datagram with ttl == 1 */ 202 if (rump_sys_sendto(s, payload, sizeof(payload), 0, 203 (struct sockaddr *)&sin, sizeof(sin)) == -1) 204 atf_tc_fail_errno("sendto"); 205 } 206 207 static void 208 router(void) 209 { 210 int mib[4] = { CTL_NET, PF_INET, IPPROTO_ICMP, 211 ICMPCTL_RETURNDATABYTES }; 212 int nv; 213 214 /* set returndatabytes to 200 */ 215 nv = 200; 216 if (rump_sys___sysctl(mib, 4, NULL, NULL, &nv, sizeof(nv)) == -1) 217 atf_tc_fail_errno("sysctl returndatabytes"); 218 219 configure_interface("bus1", "1.0.0.2", "255.255.255.0", "1.0.0.255"); 220 221 /* 222 * Wait for parent to send us the data and for us to have 223 * a chance to process it. 224 */ 225 sleep(1); 226 exit(0); 227 } 228 229 ATF_TC(returndatabytes); 230 ATF_TC_HEAD(returndatabytes, tc) 231 { 232 233 atf_tc_set_md_var(tc, "descr", "icmp.returndatabytes with certain " 234 "packets can cause kernel panic"); 235 atf_tc_set_md_var(tc, "use.fs", "true"); 236 atf_tc_set_md_var(tc, "timeout", "4"); /* just in case */ 237 /* PR kern/43548 */ 238 } 239 240 ATF_TC_BODY(returndatabytes, tc) 241 { 242 pid_t cpid; 243 int status; 244 245 cpid = fork(); 246 rump_init(); 247 248 switch (cpid) { 249 case -1: 250 atf_tc_fail_errno("fork failed"); 251 case 0: 252 router(); 253 break; 254 default: 255 sendttl(); 256 if (wait(&status) == -1) 257 atf_tc_fail_errno("wait"); 258 if (WIFEXITED(status)) { 259 if (WEXITSTATUS(status)) 260 atf_tc_fail("child exited with status %d", 261 WEXITSTATUS(status)); 262 } else { 263 atf_tc_fail("child died"); 264 } 265 } 266 } 267 268 ATF_TP_ADD_TCS(tp) 269 { 270 271 ATF_TP_ADD_TC(tp, returndatabytes); 272 273 return atf_no_error(); 274 } 275
Indexes created Thu Oct 02 10:09:58 GMT 2025