NetBSD/sbin/ifconfig/tunnel.c

191 lines
5.6 KiB
C

/* $NetBSD: tunnel.c,v 1.8 2006/08/31 17:46:16 dyoung 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 <sys/cdefs.h>
#ifndef lint
__RCSID("$NetBSD: tunnel.c,v 1.8 2006/08/31 17:46:16 dyoung Exp $");
#endif /* not lint */
#include <sys/param.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <net/if.h>
#ifdef INET6
#include <netinet/in.h>
#endif
#include <ctype.h>
#include <err.h>
#include <netdb.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <util.h>
#include "extern.h"
#include "tunnel.h"
#ifdef INET6
#include "af_inet6.h"
#endif
void
settunnel(const char *src0, const char *dst0)
{
struct addrinfo hints, *srcres, *dstres;
char *dst, *dstport, *src, *srcport;
int ecode;
struct if_laddrreq req;
memset(&hints, 0, sizeof(hints));
hints.ai_family = afp->af_af;
hints.ai_socktype = SOCK_DGRAM; /*dummy*/
if ((src = strdup(src0)) == NULL)
err(EXIT_FAILURE, "%s: strdup", __func__);
if ((dst = strdup(dst0)) == NULL)
err(EXIT_FAILURE, "%s: strdup", __func__);
srcport = src;
(void)strsep(&srcport, ",");
dstport = dst;
(void)strsep(&dstport, ",");
if ((ecode = getaddrinfo(src, srcport, &hints, &srcres)) != 0)
errx(EXIT_FAILURE, "error in parsing address string: %s",
gai_strerror(ecode));
if ((ecode = getaddrinfo(dst, dstport, &hints, &dstres)) != 0)
errx(EXIT_FAILURE, "error in parsing address string: %s",
gai_strerror(ecode));
if (srcres->ai_addr->sa_family != dstres->ai_addr->sa_family)
errx(EXIT_FAILURE,
"source and destination address families do not match");
if (srcres->ai_addrlen > sizeof(req.addr) ||
dstres->ai_addrlen > sizeof(req.dstaddr))
errx(EXIT_FAILURE, "invalid sockaddr");
memset(&req, 0, sizeof(req));
estrlcpy(req.iflr_name, name, sizeof(req.iflr_name));
memcpy(&req.addr, srcres->ai_addr, srcres->ai_addrlen);
memcpy(&req.dstaddr, dstres->ai_addr, dstres->ai_addrlen);
#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 */
}
#ifdef __KAME__
/* embed scopeid */
if (s6->sin6_scope_id &&
(IN6_IS_ADDR_LINKLOCAL(&s6->sin6_addr) ||
IN6_IS_ADDR_MC_LINKLOCAL(&s6->sin6_addr))) {
*(u_int16_t *)&s6->sin6_addr.s6_addr[2] =
htons(s6->sin6_scope_id);
}
if (d->sin6_scope_id &&
(IN6_IS_ADDR_LINKLOCAL(&d->sin6_addr) ||
IN6_IS_ADDR_MC_LINKLOCAL(&d->sin6_addr))) {
*(u_int16_t *)&d->sin6_addr.s6_addr[2] =
htons(d->sin6_scope_id);
}
#endif /* __KAME__ */
}
#endif /* INET6 */
if (ioctl(s, SIOCSLIFPHYADDR, &req) == -1)
warn("SIOCSLIFPHYADDR");
freeaddrinfo(srcres);
freeaddrinfo(dstres);
free(src);
free(dst);
}
/*ARGSUSED*/
void
deletetunnel(const char *ifname, int param)
{
if (ioctl(s, SIOCDIFPHYADDR, &ifr) == -1)
err(EXIT_FAILURE, "SIOCDIFPHYADDR");
}
void
tunnel_status(void)
{
char dstserv[sizeof(",65535")];
char srcserv[sizeof(",65535")];
char psrcaddr[NI_MAXHOST];
char pdstaddr[NI_MAXHOST];
const int niflag = NI_NUMERICHOST;
struct if_laddrreq req;
const struct afswtch *lafp;
psrcaddr[0] = pdstaddr[0] = '\0';
memset(&req, 0, sizeof(req));
estrlcpy(req.iflr_name, name, IFNAMSIZ);
if (ioctl(s, SIOCGLIFPHYADDR, &req) == -1)
return;
lafp = lookup_af_bynum(req.addr.ss_family);
#ifdef INET6
if (req.addr.ss_family == AF_INET6)
in6_fillscopeid((struct sockaddr_in6 *)&req.addr);
#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)
in6_fillscopeid((struct sockaddr_in6 *)&req.dstaddr);
#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", lafp ? lafp->af_name : "???",
psrcaddr, srcserv, pdstaddr, dstserv);
}