210 lines
6.5 KiB
C
210 lines
6.5 KiB
C
/* $NetBSD: tunnel.c,v 1.16 2008/07/15 21:27:58 dyoung Exp $ */
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/*
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* Copyright (c) 1983, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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__RCSID("$NetBSD: tunnel.c,v 1.16 2008/07/15 21:27:58 dyoung Exp $");
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#endif /* not lint */
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#include <sys/param.h>
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#include <sys/ioctl.h>
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#include <sys/socket.h>
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#include <net/if.h>
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#ifdef INET6
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#include <netinet/in.h>
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#endif
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#include <ctype.h>
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#include <err.h>
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#include <errno.h>
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#include <netdb.h>
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#include <string.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <util.h>
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#include "env.h"
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#include "extern.h"
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#include "parse.h"
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#include "util.h"
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static status_func_t status;
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static usage_func_t usage;
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static cmdloop_branch_t branch;
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static void tunnel_constructor(void) __attribute__((constructor));
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static int settunnel(prop_dictionary_t, prop_dictionary_t);
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static int deletetunnel(prop_dictionary_t, prop_dictionary_t);
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static void tunnel_status(prop_dictionary_t, prop_dictionary_t);
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struct paddr tundst = PADDR_INITIALIZER(&tundst, "tundst", settunnel,
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"tundst", NULL, NULL, NULL, &command_root.pb_parser);
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struct paddr tunsrc = PADDR_INITIALIZER(&tunsrc, "tunsrc", NULL,
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"tunsrc", NULL, NULL, NULL, &tundst.pa_parser);
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static const struct kwinst tunnelkw[] = {
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{.k_word = "deletetunnel", .k_exec = deletetunnel,
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.k_nextparser = &command_root.pb_parser}
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, {.k_word = "tunnel", .k_nextparser = &tunsrc.pa_parser}
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};
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struct pkw tunnel = PKW_INITIALIZER(&tunnel, "tunnel", NULL, NULL,
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tunnelkw, __arraycount(tunnelkw), NULL);
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static int
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settunnel(prop_dictionary_t env, prop_dictionary_t oenv)
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{
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const struct paddr_prefix *srcpfx, *dstpfx;
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struct if_laddrreq req;
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prop_data_t srcdata, dstdata;
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srcdata = (prop_data_t)prop_dictionary_get(env, "tunsrc");
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dstdata = (prop_data_t)prop_dictionary_get(env, "tundst");
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if (srcdata == NULL || dstdata == NULL) {
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warnx("%s.%d", __func__, __LINE__);
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errno = ENOENT;
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return -1;
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}
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srcpfx = prop_data_data_nocopy(srcdata);
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dstpfx = prop_data_data_nocopy(dstdata);
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if (srcpfx->pfx_addr.sa_family != dstpfx->pfx_addr.sa_family)
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errx(EXIT_FAILURE,
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"source and destination address families do not match");
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memset(&req, 0, sizeof(req));
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memcpy(&req.addr, &srcpfx->pfx_addr,
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MIN(sizeof(req.addr), srcpfx->pfx_addr.sa_len));
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memcpy(&req.dstaddr, &dstpfx->pfx_addr,
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MIN(sizeof(req.dstaddr), dstpfx->pfx_addr.sa_len));
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#ifdef INET6
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if (req.addr.ss_family == AF_INET6) {
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struct sockaddr_in6 *s6, *d;
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s6 = (struct sockaddr_in6 *)&req.addr;
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d = (struct sockaddr_in6 *)&req.dstaddr;
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if (s6->sin6_scope_id != d->sin6_scope_id) {
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errx(EXIT_FAILURE, "scope mismatch");
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/* NOTREACHED */
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}
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if (IN6_IS_ADDR_MULTICAST(&d->sin6_addr) ||
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IN6_IS_ADDR_MULTICAST(&s6->sin6_addr))
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errx(EXIT_FAILURE, "tunnel src/dst is multicast");
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/* embed scopeid */
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if (s6->sin6_scope_id &&
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IN6_IS_ADDR_LINKLOCAL(&s6->sin6_addr)) {
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*(u_int16_t *)&s6->sin6_addr.s6_addr[2] =
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htons(s6->sin6_scope_id);
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}
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if (d->sin6_scope_id && IN6_IS_ADDR_LINKLOCAL(&d->sin6_addr)) {
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*(u_int16_t *)&d->sin6_addr.s6_addr[2] =
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htons(d->sin6_scope_id);
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}
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}
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#endif /* INET6 */
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if (direct_ioctl(env, SIOCSLIFPHYADDR, &req) == -1)
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warn("SIOCSLIFPHYADDR");
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return 0;
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}
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static int
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deletetunnel(prop_dictionary_t env, prop_dictionary_t oenv)
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{
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if (indirect_ioctl(env, SIOCDIFPHYADDR, NULL) == -1)
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err(EXIT_FAILURE, "SIOCDIFPHYADDR");
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return 0;
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}
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static void
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tunnel_status(prop_dictionary_t env, prop_dictionary_t oenv)
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{
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char dstserv[sizeof(",65535")];
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char srcserv[sizeof(",65535")];
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char psrcaddr[NI_MAXHOST];
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char pdstaddr[NI_MAXHOST];
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const int niflag = NI_NUMERICHOST|NI_NUMERICSERV;
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struct if_laddrreq req;
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const struct afswtch *afp;
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psrcaddr[0] = pdstaddr[0] = '\0';
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memset(&req, 0, sizeof(req));
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if (direct_ioctl(env, SIOCGLIFPHYADDR, &req) == -1)
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return;
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afp = lookup_af_bynum(req.addr.ss_family);
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#ifdef INET6
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if (req.addr.ss_family == AF_INET6)
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in6_fillscopeid((struct sockaddr_in6 *)&req.addr);
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#endif /* INET6 */
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getnameinfo((struct sockaddr *)&req.addr, req.addr.ss_len,
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psrcaddr, sizeof(psrcaddr), &srcserv[1], sizeof(srcserv) - 1,
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niflag);
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#ifdef INET6
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if (req.dstaddr.ss_family == AF_INET6)
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in6_fillscopeid((struct sockaddr_in6 *)&req.dstaddr);
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#endif
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getnameinfo((struct sockaddr *)&req.dstaddr, req.dstaddr.ss_len,
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pdstaddr, sizeof(pdstaddr), &dstserv[1], sizeof(dstserv) - 1,
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niflag);
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srcserv[0] = (strcmp(&srcserv[1], "0") == 0) ? '\0' : ',';
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dstserv[0] = (strcmp(&dstserv[1], "0") == 0) ? '\0' : ',';
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printf("\ttunnel %s %s%s --> %s%s\n", afp ? afp->af_name : "???",
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psrcaddr, srcserv, pdstaddr, dstserv);
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}
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static void
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tunnel_usage(prop_dictionary_t env)
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{
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fprintf(stderr,
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"\t[ [ af ] tunnel src_addr dest_addr ] [ deletetunnel ]\n");
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}
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static void
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tunnel_constructor(void)
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{
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cmdloop_branch_init(&branch, &tunnel.pk_parser);
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register_cmdloop_branch(&branch);
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status_func_init(&status, tunnel_status);
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usage_func_init(&usage, tunnel_usage);
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register_status(&status);
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register_usage(&usage);
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}
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