tunnel.c revision 1.7
1 /* $NetBSD: tunnel.c,v 1.7 2006/08/26 18:14:28 christos 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 1.7 2006/08/26 18:14:28 christos 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 <netdb.h> 50 #include <string.h> 51 #include <stdlib.h> 52 #include <stdio.h> 53 #include <util.h> 54 55 #include "extern.h" 56 #include "tunnel.h" 57 58 #ifdef INET6 59 #include "af_inet6.h" 60 #endif 61 62 void 63 settunnel(const char *src, const char *dst) 64 { 65 struct addrinfo hints, *srcres, *dstres; 66 int ecode; 67 struct if_laddrreq req; 68 69 memset(&hints, 0, sizeof(hints)); 70 hints.ai_family = afp->af_af; 71 hints.ai_socktype = SOCK_DGRAM; /*dummy*/ 72 73 if ((ecode = getaddrinfo(src, NULL, &hints, &srcres)) != 0) 74 errx(EXIT_FAILURE, "error in parsing address string: %s", 75 gai_strerror(ecode)); 76 77 if ((ecode = getaddrinfo(dst, NULL, &hints, &dstres)) != 0) 78 errx(EXIT_FAILURE, "error in parsing address string: %s", 79 gai_strerror(ecode)); 80 81 if (srcres->ai_addr->sa_family != dstres->ai_addr->sa_family) 82 errx(EXIT_FAILURE, 83 "source and destination address families do not match"); 84 85 if (srcres->ai_addrlen > sizeof(req.addr) || 86 dstres->ai_addrlen > sizeof(req.dstaddr)) 87 errx(EXIT_FAILURE, "invalid sockaddr"); 88 89 memset(&req, 0, sizeof(req)); 90 estrlcpy(req.iflr_name, name, sizeof(req.iflr_name)); 91 memcpy(&req.addr, srcres->ai_addr, srcres->ai_addrlen); 92 memcpy(&req.dstaddr, dstres->ai_addr, dstres->ai_addrlen); 93 94 #ifdef INET6 95 if (req.addr.ss_family == AF_INET6) { 96 struct sockaddr_in6 *s6, *d; 97 98 s6 = (struct sockaddr_in6 *)&req.addr; 99 d = (struct sockaddr_in6 *)&req.dstaddr; 100 if (s6->sin6_scope_id != d->sin6_scope_id) { 101 errx(EXIT_FAILURE, "scope mismatch"); 102 /* NOTREACHED */ 103 } 104 #ifdef __KAME__ 105 /* embed scopeid */ 106 if (s6->sin6_scope_id && 107 (IN6_IS_ADDR_LINKLOCAL(&s6->sin6_addr) || 108 IN6_IS_ADDR_MC_LINKLOCAL(&s6->sin6_addr))) { 109 *(u_int16_t *)&s6->sin6_addr.s6_addr[2] = 110 htons(s6->sin6_scope_id); 111 } 112 if (d->sin6_scope_id && 113 (IN6_IS_ADDR_LINKLOCAL(&d->sin6_addr) || 114 IN6_IS_ADDR_MC_LINKLOCAL(&d->sin6_addr))) { 115 *(u_int16_t *)&d->sin6_addr.s6_addr[2] = 116 htons(d->sin6_scope_id); 117 } 118 #endif /* __KAME__ */ 119 } 120 #endif /* INET6 */ 121 122 if (ioctl(s, SIOCSLIFPHYADDR, &req) == -1) 123 warn("SIOCSLIFPHYADDR"); 124 125 freeaddrinfo(srcres); 126 freeaddrinfo(dstres); 127 } 128 129 /*ARGSUSED*/ 130 void 131 deletetunnel(const char *ifname, int param) 132 { 133 134 if (ioctl(s, SIOCDIFPHYADDR, &ifr) == -1) 135 err(EXIT_FAILURE, "SIOCDIFPHYADDR"); 136 } 137 138 void 139 tunnel_status(void) 140 { 141 char psrcaddr[NI_MAXHOST]; 142 char pdstaddr[NI_MAXHOST]; 143 const int niflag = NI_NUMERICHOST; 144 struct if_laddrreq req; 145 const struct afswtch *lafp; 146 147 psrcaddr[0] = pdstaddr[0] = '\0'; 148 149 memset(&req, 0, sizeof(req)); 150 estrlcpy(req.iflr_name, name, IFNAMSIZ); 151 if (ioctl(s, SIOCGLIFPHYADDR, &req) == -1) 152 return; 153 lafp = lookup_af_bynum(req.addr.ss_family); 154 #ifdef INET6 155 if (req.addr.ss_family == AF_INET6) 156 in6_fillscopeid((struct sockaddr_in6 *)&req.addr); 157 #endif /* INET6 */ 158 getnameinfo((struct sockaddr *)&req.addr, req.addr.ss_len, 159 psrcaddr, sizeof(psrcaddr), 0, 0, niflag); 160 161 #ifdef INET6 162 if (req.dstaddr.ss_family == AF_INET6) 163 in6_fillscopeid((struct sockaddr_in6 *)&req.dstaddr); 164 #endif 165 getnameinfo((struct sockaddr *)&req.dstaddr, req.dstaddr.ss_len, 166 pdstaddr, sizeof(pdstaddr), 0, 0, niflag); 167 168 printf("\ttunnel %s %s --> %s\n", lafp ? lafp->af_name : "???", 169 psrcaddr, pdstaddr); 170 } 171
Indexes created Mon Sep 29 13:09:55 GMT 2025