tunnel.c revision 1.3
1 /* $NetBSD: tunnel.c,v 1.3 2005/03/19 22:57:06 thorpej 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 1.3 2005/03/19 22:57:06 thorpej 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 54 #include "extern.h" 55 #include "tunnel.h" 56 57 #ifdef INET6 58 extern void in6_fillscopeid(struct sockaddr_in6 *sin6); /* XXX */ 59 #endif 60 61 void 62 settunnel(const char *src, const char *dst) 63 { 64 struct addrinfo hints, *srcres, *dstres; 65 int ecode; 66 struct if_laddrreq req; 67 68 memset(&hints, 0, sizeof(hints)); 69 hints.ai_family = afp->af_af; 70 hints.ai_socktype = SOCK_DGRAM; /*dummy*/ 71 72 if ((ecode = getaddrinfo(src, NULL, &hints, &srcres)) != 0) 73 errx(EXIT_FAILURE, "error in parsing address string: %s", 74 gai_strerror(ecode)); 75 76 if ((ecode = getaddrinfo(dst, NULL, &hints, &dstres)) != 0) 77 errx(EXIT_FAILURE, "error in parsing address string: %s", 78 gai_strerror(ecode)); 79 80 if (srcres->ai_addr->sa_family != dstres->ai_addr->sa_family) 81 errx(EXIT_FAILURE, 82 "source and destination address families do not match"); 83 84 if (srcres->ai_addrlen > sizeof(req.addr) || 85 dstres->ai_addrlen > sizeof(req.dstaddr)) 86 errx(EXIT_FAILURE, "invalid sockaddr"); 87 88 memset(&req, 0, sizeof(req)); 89 strncpy(req.iflr_name, name, sizeof(req.iflr_name)); 90 memcpy(&req.addr, srcres->ai_addr, srcres->ai_addrlen); 91 memcpy(&req.dstaddr, dstres->ai_addr, dstres->ai_addrlen); 92 93 #ifdef INET6 94 if (req.addr.ss_family == AF_INET6) { 95 struct sockaddr_in6 *s6, *d; 96 97 s6 = (struct sockaddr_in6 *)&req.addr; 98 d = (struct sockaddr_in6 *)&req.dstaddr; 99 if (s6->sin6_scope_id != d->sin6_scope_id) { 100 errx(EXIT_FAILURE, "scope mismatch"); 101 /* NOTREACHED */ 102 } 103 #ifdef __KAME__ 104 /* embed scopeid */ 105 if (s6->sin6_scope_id && 106 (IN6_IS_ADDR_LINKLOCAL(&s6->sin6_addr) || 107 IN6_IS_ADDR_MC_LINKLOCAL(&s6->sin6_addr))) { 108 *(u_int16_t *)&s6->sin6_addr.s6_addr[2] = 109 htons(s6->sin6_scope_id); 110 } 111 if (d->sin6_scope_id && 112 (IN6_IS_ADDR_LINKLOCAL(&d->sin6_addr) || 113 IN6_IS_ADDR_MC_LINKLOCAL(&d->sin6_addr))) { 114 *(u_int16_t *)&d->sin6_addr.s6_addr[2] = 115 htons(d->sin6_scope_id); 116 } 117 #endif /* __KAME__ */ 118 } 119 #endif /* INET6 */ 120 121 if (ioctl(s, SIOCSLIFPHYADDR, &req) == -1) 122 warn("SIOCSLIFPHYADDR"); 123 124 freeaddrinfo(srcres); 125 freeaddrinfo(dstres); 126 } 127 128 /*ARGSUSED*/ 129 void 130 deletetunnel(const char *ifname, int param) 131 { 132 133 if (ioctl(s, SIOCDIFPHYADDR, &ifr) == -1) 134 err(EXIT_FAILURE, "SIOCDIFPHYADDR"); 135 } 136 137 void 138 tunnel_status(void) 139 { 140 char psrcaddr[NI_MAXHOST]; 141 char pdstaddr[NI_MAXHOST]; 142 const int niflag = NI_NUMERICHOST; 143 struct if_laddrreq req; 144 struct afswtch *lafp; 145 146 psrcaddr[0] = pdstaddr[0] = '\0'; 147 148 memset(&req, 0, sizeof(req)); 149 strncpy(req.iflr_name, name, IFNAMSIZ); 150 if (ioctl(s, SIOCGLIFPHYADDR, &req) == -1) 151 return; 152 lafp = lookup_af_bynum(req.addr.ss_family); 153 #ifdef INET6 154 if (req.addr.ss_family == AF_INET6) 155 in6_fillscopeid((struct sockaddr_in6 *)&req.addr); 156 #endif /* INET6 */ 157 getnameinfo((struct sockaddr *)&req.addr, req.addr.ss_len, 158 psrcaddr, sizeof(psrcaddr), 0, 0, niflag); 159 160 #ifdef INET6 161 if (req.dstaddr.ss_family == AF_INET6) 162 in6_fillscopeid((struct sockaddr_in6 *)&req.dstaddr); 163 #endif 164 getnameinfo((struct sockaddr *)&req.dstaddr, req.dstaddr.ss_len, 165 pdstaddr, sizeof(pdstaddr), 0, 0, niflag); 166 167 printf("\ttunnel %s %s --> %s\n", lafp ? lafp->af_name : "???", 168 psrcaddr, pdstaddr); 169 } 170
Indexes created Fri Sep 26 20:09:58 GMT 2025