xref: /freebsd-11-stable/contrib/smbfs/lib/smb/nb_net.c

/*
 * Copyright (c) 2000, Boris Popov
 * 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. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *    This product includes software developed by Boris Popov.
 * 4. Neither the name of the author nor the names of any co-contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
 *
 * $Id: nb_net.c,v 1.4 2001/02/16 02:46:12 bp Exp $
 * $FreeBSD$
 */
#include <sys/param.h>
#include <sys/socket.h>

#include <net/if.h>

#include <ctype.h>
#include <netdb.h>
#include <err.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <unistd.h>
#include <ifaddrs.h>

#include <netsmb/netbios.h>
#include <netsmb/smb_lib.h>
#include <netsmb/nb_lib.h>

int
nb_getlocalname(char *name)
{
	char buf[1024], *cp;

	if (gethostname(buf, sizeof(buf)) != 0)
		return errno;
	cp = strchr(buf, '.');
	if (cp)
		*cp = 0;
	strcpy(name, buf);
	return 0;
}

int
nb_resolvehost_in(const char *name, struct sockaddr **dest, long smbtcpport)
{
	struct hostent* h;
	struct sockaddr_in *sinp;
	int len;

	h = gethostbyname(name);
	if (!h) {
		warnx("can't get server address `%s': ", name);
		herror(NULL);
		return ENETDOWN;
	}
	if (h->h_addrtype != AF_INET) {
		warnx("address for `%s' is not in the AF_INET family", name);
		return EAFNOSUPPORT;
	}
	if (h->h_length != 4) {
		warnx("address for `%s' has invalid length", name);
		return EAFNOSUPPORT;
	}
	len = sizeof(struct sockaddr_in);
	sinp = malloc(len);
	if (sinp == NULL)
		return ENOMEM;
	bzero(sinp, len);
	sinp->sin_len = len;
	sinp->sin_family = h->h_addrtype;
	memcpy(&sinp->sin_addr.s_addr, h->h_addr, 4);
	sinp->sin_port = htons(smbtcpport);
	*dest = (struct sockaddr*)sinp;
	return 0;
}

int
nb_enum_if(struct nb_ifdesc **iflist, int maxif)
{
	struct nb_ifdesc *ifd;
	struct ifaddrs *ifp, *p;
	int i;

	if (getifaddrs(&ifp) < 0)
		return errno;

	*iflist = NULL;
	i = 0;
	for (p = ifp; p; p = p->ifa_next) {

		if (i >= maxif)
			break;

		if ((p->ifa_addr->sa_family != AF_INET) ||
		    ((p->ifa_flags & (IFF_UP|IFF_BROADCAST))
		     != (IFF_UP|IFF_BROADCAST)))
			continue;
		if (strlen(p->ifa_name) >= sizeof(ifd->id_name))
			continue;

		ifd = malloc(sizeof(struct nb_ifdesc));
		if (ifd == NULL) {
			freeifaddrs(ifp);
			/* XXX should free stuff already in *iflist */
			return ENOMEM;
		}
		bzero(ifd, sizeof(struct nb_ifdesc));
		strcpy(ifd->id_name, p->ifa_name);
		ifd->id_flags = p->ifa_flags;
		ifd->id_addr = ((struct sockaddr_in *)p->ifa_addr)->sin_addr;
		ifd->id_mask = ((struct sockaddr_in *)p->ifa_netmask)->sin_addr;
		ifd->id_next = *iflist;
		*iflist = ifd;
		i++;
	}

	freeifaddrs(ifp);
	return 0;
}

/*ARGSUSED*/
/*int
nbns_resolvename(const char *name, struct sockaddr **dest)
{
	printf("NetBIOS name resolver is not included in this distribution.\n");
	printf("Please use '-I' option to specify an IP address of server.\n");
	return EHOSTUNREACH;
}*/
/*
int
nb_hostlookup(struct nb_name *np, const char *server, const char *hint,
	struct sockaddr_nb **dst)
{
	struct sockaddr_nb *snb;
	int error;

	error = nb_sockaddr(NULL, np, &snb);
	if (error)
		return error;
	do {
		if (hint) {
			error = nb_resolvehost_in(host, snb, SMB_TCP_PORT);
			if (error)
				break;
		} else {
			error = nb_resolvename(server);
		}
	} while(0);
	if (!error) {
		*dst = snb;
	} else
		nb_snbfree(snb);
	return error;
}
*/