NetBSD/sbin/ifconfig/af_ns.c

/*	$NetBSD: af_ns.c,v 1.4 2006/06/16 23:48:35 elad 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.
 */

#ifndef INET_ONLY

#include <sys/cdefs.h>
#ifndef lint
__RCSID("$NetBSD: af_ns.c,v 1.4 2006/06/16 23:48:35 elad Exp $");
#endif /* not lint */

/*
 * XNS support liberally adapted from code written at the University of
 * Maryland principally by James O'Toole and Chris Torek.
 */

#include <sys/param.h> 
#include <sys/ioctl.h> 
#include <sys/socket.h>

#include <net/if.h> 

#define NSIP
#include <netns/ns.h>
#include <netns/ns_if.h>

#include <err.h>
#include <errno.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>

#include "extern.h"
#include "af_ns.h"

#define SNS(x) ((struct sockaddr_ns *) &(x))
struct sockaddr_ns *snstab[] = {
    SNS(ridreq.ifr_addr), SNS(addreq.ifra_addr),
    SNS(addreq.ifra_mask), SNS(addreq.ifra_broadaddr)
};

void
xns_set_nsip_route(const struct sockaddr *ns, const struct sockaddr *ip)
{
	struct nsip_req rq;
	int size = sizeof(rq);

	rq.rq_ns = *ns;
	rq.rq_ip = *ip;
	rq.rq_flags = 0;

	if (setsockopt(s, 0, SO_NSIP_ROUTE, &rq, size) < 0)
		warn("encapsulation routing");
}

void
xns_getaddr(const char *addr, int which)
{
	struct sockaddr_ns *sns = snstab[which];

	sns->sns_family = AF_NS;
	sns->sns_len = sizeof(*sns);
	sns->sns_addr = ns_addr(addr);
	if (which == MASK)
		puts("Attempt to set XNS netmask will be ineffectual");
}

void
xns_status(int force)
{
	struct sockaddr_ns *sns;

	getsock(AF_NS);
	if (s < 0) {
		if (errno == EAFNOSUPPORT)
			return;
		err(EXIT_FAILURE, "socket");
	}
	(void) memset(&ifr, 0, sizeof(ifr));
	estrlcpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
	if (ioctl(s, SIOCGIFADDR, &ifr) == -1) {
		if (errno == EADDRNOTAVAIL || errno == EAFNOSUPPORT) {
			if (!force)
				return;
			memset(&ifr.ifr_addr, 0, sizeof(ifr.ifr_addr));
		} else
			warn("SIOCGIFADDR");
	}
	estrlcpy(ifr.ifr_name, name, sizeof ifr.ifr_name);
	sns = (struct sockaddr_ns *)&ifr.ifr_addr;
	printf("\tns %s ", ns_ntoa(sns->sns_addr));
	if (flags & IFF_POINTOPOINT) { /* by W. Nesheim@Cornell */
		if (ioctl(s, SIOCGIFDSTADDR, &ifr) == -1) {
			if (errno == EADDRNOTAVAIL)
			    memset(&ifr.ifr_addr, 0, sizeof(ifr.ifr_addr));
			else
			    warn("SIOCGIFDSTADDR");
		}
		estrlcpy(ifr.ifr_name, name, sizeof (ifr.ifr_name));
		sns = (struct sockaddr_ns *)&ifr.ifr_dstaddr;
		printf("--> %s ", ns_ntoa(sns->sns_addr));
	}
	printf("\n");
}

#endif /* ! INET_ONLY */