NetBSD/sbin/ifconfig/tunnel.c

205 lines
6.3 KiB
C

/* $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 <sys/cdefs.h>
#ifndef lint
__RCSID("$NetBSD: tunnel.c,v 1.20 2013/10/19 15:59:15 christos 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 <errno.h>
#include <netdb.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <util.h>
#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);
}