/* $NetBSD: tunnel.c,v 1.20 2013/10/19 15:59:15 christos Exp $ */ /* * Copyright (c) 1983, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include #ifndef lint __RCSID("$NetBSD: tunnel.c,v 1.20 2013/10/19 15:59:15 christos Exp $"); #endif /* not lint */ #include #include #include #include #ifdef INET6 #include #endif #include #include #include #include #include #include #include #include #include "env.h" #include "extern.h" #include "parse.h" #include "util.h" static status_func_t status; static usage_func_t usage; static cmdloop_branch_t branch; static void tunnel_constructor(void) __attribute__((constructor)); static int settunnel(prop_dictionary_t, prop_dictionary_t); static int deletetunnel(prop_dictionary_t, prop_dictionary_t); static void tunnel_status(prop_dictionary_t, prop_dictionary_t); struct paddr tundst = PADDR_INITIALIZER(&tundst, "tundst", settunnel, "tundst", NULL, NULL, NULL, &command_root.pb_parser); struct paddr tunsrc = PADDR_INITIALIZER(&tunsrc, "tunsrc", NULL, "tunsrc", NULL, NULL, NULL, &tundst.pa_parser); static const struct kwinst tunnelkw[] = { {.k_word = "deletetunnel", .k_exec = deletetunnel, .k_nextparser = &command_root.pb_parser} , {.k_word = "tunnel", .k_nextparser = &tunsrc.pa_parser} }; struct pkw tunnel = PKW_INITIALIZER(&tunnel, "tunnel", NULL, NULL, tunnelkw, __arraycount(tunnelkw), NULL); static int settunnel(prop_dictionary_t env, prop_dictionary_t oenv) { const struct paddr_prefix *srcpfx, *dstpfx; struct if_laddrreq req; prop_data_t srcdata, dstdata; srcdata = (prop_data_t)prop_dictionary_get(env, "tunsrc"); dstdata = (prop_data_t)prop_dictionary_get(env, "tundst"); if (srcdata == NULL || dstdata == NULL) { warnx("%s.%d", __func__, __LINE__); errno = ENOENT; return -1; } srcpfx = prop_data_data_nocopy(srcdata); dstpfx = prop_data_data_nocopy(dstdata); if (srcpfx->pfx_addr.sa_family != dstpfx->pfx_addr.sa_family) errx(EXIT_FAILURE, "source and destination address families do not match"); memset(&req, 0, sizeof(req)); memcpy(&req.addr, &srcpfx->pfx_addr, MIN(sizeof(req.addr), srcpfx->pfx_addr.sa_len)); memcpy(&req.dstaddr, &dstpfx->pfx_addr, MIN(sizeof(req.dstaddr), dstpfx->pfx_addr.sa_len)); #ifdef INET6 if (req.addr.ss_family == AF_INET6) { struct sockaddr_in6 *s6, *d; s6 = (struct sockaddr_in6 *)&req.addr; d = (struct sockaddr_in6 *)&req.dstaddr; if (s6->sin6_scope_id != d->sin6_scope_id) { errx(EXIT_FAILURE, "scope mismatch"); /* NOTREACHED */ } if (IN6_IS_ADDR_MULTICAST(&d->sin6_addr) || IN6_IS_ADDR_MULTICAST(&s6->sin6_addr)) errx(EXIT_FAILURE, "tunnel src/dst is multicast"); /* embed scopeid */ inet6_putscopeid(s6, INET6_IS_ADDR_LINKLOCAL); inet6_putscopeid(d, INET6_IS_ADDR_LINKLOCAL); } #endif /* INET6 */ if (direct_ioctl(env, SIOCSLIFPHYADDR, &req) == -1) warn("SIOCSLIFPHYADDR"); return 0; } static int deletetunnel(prop_dictionary_t env, prop_dictionary_t oenv) { if (indirect_ioctl(env, SIOCDIFPHYADDR, NULL) == -1) err(EXIT_FAILURE, "SIOCDIFPHYADDR"); return 0; } static void tunnel_status(prop_dictionary_t env, prop_dictionary_t oenv) { char dstserv[sizeof(",65535")]; char srcserv[sizeof(",65535")]; char psrcaddr[NI_MAXHOST]; char pdstaddr[NI_MAXHOST]; const int niflag = Nflag ? 0 : (NI_NUMERICHOST|NI_NUMERICSERV); struct if_laddrreq req; const struct afswtch *afp; psrcaddr[0] = pdstaddr[0] = '\0'; memset(&req, 0, sizeof(req)); if (direct_ioctl(env, SIOCGLIFPHYADDR, &req) == -1) return; afp = lookup_af_bynum(req.addr.ss_family); #ifdef INET6 if (req.addr.ss_family == AF_INET6) inet6_getscopeid((struct sockaddr_in6 *)&req.addr, INET6_IS_ADDR_LINKLOCAL); #endif /* INET6 */ getnameinfo((struct sockaddr *)&req.addr, req.addr.ss_len, psrcaddr, sizeof(psrcaddr), &srcserv[1], sizeof(srcserv) - 1, niflag); #ifdef INET6 if (req.dstaddr.ss_family == AF_INET6) inet6_getscopeid((struct sockaddr_in6 *)&req.dstaddr, INET6_IS_ADDR_LINKLOCAL); #endif getnameinfo((struct sockaddr *)&req.dstaddr, req.dstaddr.ss_len, pdstaddr, sizeof(pdstaddr), &dstserv[1], sizeof(dstserv) - 1, niflag); srcserv[0] = (strcmp(&srcserv[1], "0") == 0) ? '\0' : ','; dstserv[0] = (strcmp(&dstserv[1], "0") == 0) ? '\0' : ','; printf("\ttunnel %s %s%s --> %s%s\n", afp ? afp->af_name : "???", psrcaddr, srcserv, pdstaddr, dstserv); } static void tunnel_usage(prop_dictionary_t env) { fprintf(stderr, "\t[ [ af ] tunnel src_addr dest_addr ] [ deletetunnel ]\n"); } static void tunnel_constructor(void) { cmdloop_branch_init(&branch, &tunnel.pk_parser); register_cmdloop_branch(&branch); status_func_init(&status, tunnel_status); usage_func_init(&usage, tunnel_usage); register_status(&status); register_usage(&usage); }