tunnel.c revision 1.11
1 /* $NetBSD: tunnel.c,v 1.11 2008/05/06 17:29:04 dyoung Exp $ */ 2 3 /* 4 * Copyright (c) 1983, 1993 5 * The Regents of the University of California. 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 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 #ifndef lint 34 __RCSID("$NetBSD: tunnel.c,v 1.11 2008/05/06 17:29:04 dyoung Exp $"); 35 #endif /* not lint */ 36 37 #include <sys/param.h> 38 #include <sys/ioctl.h> 39 #include <sys/socket.h> 40 41 #include <net/if.h> 42 43 #ifdef INET6 44 #include <netinet/in.h> 45 #endif 46 47 #include <ctype.h> 48 #include <err.h> 49 #include <errno.h> 50 #include <netdb.h> 51 #include <string.h> 52 #include <stdlib.h> 53 #include <stdio.h> 54 #include <util.h> 55 56 #include "parse.h" 57 #include "env.h" 58 #include "util.h" 59 #include "tunnel.h" 60 61 #ifdef INET6 62 #include "af_inet6.h" 63 #endif 64 65 struct paddr tundst = PADDR_INITIALIZER(&tundst, "tundst", settunnel, 66 "tundst", NULL, NULL, NULL, &command_root.pb_parser); 67 68 struct paddr tunsrc = PADDR_INITIALIZER(&tunsrc, "tunsrc", NULL, 69 "tunsrc", NULL, NULL, NULL, &tundst.pa_parser); 70 71 int 72 settunnel(prop_dictionary_t env, prop_dictionary_t xenv) 73 { 74 const struct paddr_prefix *srcpfx, *dstpfx; 75 struct if_laddrreq req; 76 int s; 77 prop_data_t srcdata, dstdata; 78 const char *ifname; 79 80 if ((s = getsock(AF_UNSPEC)) == -1) 81 err(EXIT_FAILURE, "%s: getsock", __func__); 82 83 if ((ifname = getifname(env)) == NULL) 84 return -1; 85 86 srcdata = (prop_data_t)prop_dictionary_get(env, "tunsrc"); 87 dstdata = (prop_data_t)prop_dictionary_get(env, "tundst"); 88 89 if (srcdata == NULL || dstdata == NULL) { 90 warnx("%s.%d", __func__, __LINE__); 91 errno = ENOENT; 92 return -1; 93 } 94 95 srcpfx = prop_data_data_nocopy(srcdata); 96 dstpfx = prop_data_data_nocopy(dstdata); 97 98 if (srcpfx->pfx_addr.sa_family != dstpfx->pfx_addr.sa_family) 99 errx(EXIT_FAILURE, 100 "source and destination address families do not match"); 101 102 memset(&req, 0, sizeof(req)); 103 estrlcpy(req.iflr_name, ifname, sizeof(req.iflr_name)); 104 memcpy(&req.addr, &srcpfx->pfx_addr, 105 MIN(sizeof(req.addr), srcpfx->pfx_addr.sa_len)); 106 memcpy(&req.dstaddr, &dstpfx->pfx_addr, 107 MIN(sizeof(req.dstaddr), dstpfx->pfx_addr.sa_len)); 108 109 #ifdef INET6 110 if (req.addr.ss_family == AF_INET6) { 111 struct sockaddr_in6 *s6, *d; 112 113 s6 = (struct sockaddr_in6 *)&req.addr; 114 d = (struct sockaddr_in6 *)&req.dstaddr; 115 if (s6->sin6_scope_id != d->sin6_scope_id) { 116 errx(EXIT_FAILURE, "scope mismatch"); 117 /* NOTREACHED */ 118 } 119 /* embed scopeid */ 120 if (s6->sin6_scope_id && 121 (IN6_IS_ADDR_LINKLOCAL(&s6->sin6_addr) || 122 IN6_IS_ADDR_MC_LINKLOCAL(&s6->sin6_addr))) { 123 *(u_int16_t *)&s6->sin6_addr.s6_addr[2] = 124 htons(s6->sin6_scope_id); 125 } 126 if (d->sin6_scope_id && 127 (IN6_IS_ADDR_LINKLOCAL(&d->sin6_addr) || 128 IN6_IS_ADDR_MC_LINKLOCAL(&d->sin6_addr))) { 129 *(u_int16_t *)&d->sin6_addr.s6_addr[2] = 130 htons(d->sin6_scope_id); 131 } 132 } 133 #endif /* INET6 */ 134 135 if (ioctl(s, SIOCSLIFPHYADDR, &req) == -1) 136 warn("SIOCSLIFPHYADDR"); 137 return 0; 138 } 139 140 int 141 deletetunnel(prop_dictionary_t env, prop_dictionary_t xenv) 142 { 143 int s; 144 struct ifreq ifr; 145 const char *ifname; 146 147 if ((s = getsock(AF_UNSPEC)) == -1) 148 err(EXIT_FAILURE, "%s: getsock", __func__); 149 150 if ((ifname = getifname(env)) == NULL) 151 return -1; 152 153 memset(&ifr, 0, sizeof(ifr)); 154 155 estrlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name)); 156 if (ioctl(s, SIOCDIFPHYADDR, &ifr) == -1) 157 err(EXIT_FAILURE, "SIOCDIFPHYADDR"); 158 return 0; 159 } 160 161 void 162 tunnel_status(prop_dictionary_t env, prop_dictionary_t oenv) 163 { 164 char dstserv[sizeof(",65535")]; 165 char srcserv[sizeof(",65535")]; 166 char psrcaddr[NI_MAXHOST]; 167 char pdstaddr[NI_MAXHOST]; 168 const int niflag = NI_NUMERICHOST|NI_NUMERICSERV; 169 struct if_laddrreq req; 170 const struct afswtch *lafp; 171 int s; 172 const char *ifname; 173 174 if ((s = getsock(AF_UNSPEC)) == -1) 175 err(EXIT_FAILURE, "%s: getsock", __func__); 176 177 psrcaddr[0] = pdstaddr[0] = '\0'; 178 179 if ((ifname = getifname(env)) == NULL) 180 err(EXIT_FAILURE, "%s: getifname", __func__); 181 182 memset(&req, 0, sizeof(req)); 183 estrlcpy(req.iflr_name, ifname, IFNAMSIZ); 184 if (ioctl(s, SIOCGLIFPHYADDR, &req) == -1) 185 return; 186 lafp = lookup_af_bynum(req.addr.ss_family); 187 #ifdef INET6 188 if (req.addr.ss_family == AF_INET6) 189 in6_fillscopeid((struct sockaddr_in6 *)&req.addr); 190 #endif /* INET6 */ 191 getnameinfo((struct sockaddr *)&req.addr, req.addr.ss_len, 192 psrcaddr, sizeof(psrcaddr), &srcserv[1], sizeof(srcserv) - 1, 193 niflag); 194 195 #ifdef INET6 196 if (req.dstaddr.ss_family == AF_INET6) 197 in6_fillscopeid((struct sockaddr_in6 *)&req.dstaddr); 198 #endif 199 getnameinfo((struct sockaddr *)&req.dstaddr, req.dstaddr.ss_len, 200 pdstaddr, sizeof(pdstaddr), &dstserv[1], sizeof(dstserv) - 1, 201 niflag); 202 203 srcserv[0] = (strcmp(&srcserv[1], "0") == 0) ? '\0' : ','; 204 dstserv[0] = (strcmp(&dstserv[1], "0") == 0) ? '\0' : ','; 205 206 printf("\ttunnel %s %s%s --> %s%s\n", lafp ? lafp->af_name : "???", 207 psrcaddr, srcserv, pdstaddr, dstserv); 208 } 209
Indexes created Mon Sep 29 21:09:56 GMT 2025