nb_net.c revision 125130 
1/*
2 * Copyright (c) 2000, Boris Popov
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 *    must display the following acknowledgement:
15 *    This product includes software developed by Boris Popov.
16 * 4. Neither the name of the author nor the names of any co-contributors
17 *    may be used to endorse or promote products derived from this software
18 *    without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 *
32 * $Id: nb_net.c,v 1.4 2001/02/16 02:46:12 bp Exp $
33 * $FreeBSD: head/contrib/smbfs/lib/smb/nb_net.c 125130 2004-01-28 05:55:13Z tjr $
34 */
35#include <sys/param.h>
36#include <sys/socket.h>
37#include <sys/ioctl.h>
38
39#include <net/if.h>
40
41#include <ctype.h>
42#include <netdb.h>
43#include <err.h>
44#include <errno.h>
45#include <stdlib.h>
46#include <string.h>
47#include <stdio.h>
48#include <unistd.h>
49
50#include <netsmb/netbios.h>
51#include <netsmb/smb_lib.h>
52#include <netsmb/nb_lib.h>
53
54int
55nb_getlocalname(char *name)
56{
57	char buf[1024], *cp;
58
59	if (gethostname(buf, sizeof(buf)) != 0)
60		return errno;
61	cp = strchr(buf, '.');
62	if (cp)
63		*cp = 0;
64	strcpy(name, buf);
65	return 0;
66}
67
68int
69nb_resolvehost_in(const char *name, struct sockaddr **dest)
70{
71	struct hostent* h;
72	struct sockaddr_in *sinp;
73	int len;
74
75	h = gethostbyname(name);
76	if (!h) {
77		warnx("can't get server address `%s': ", name);
78		herror(NULL);
79		return ENETDOWN;
80	}
81	if (h->h_addrtype != AF_INET) {
82		warnx("address for `%s' is not in the AF_INET family", name);
83		return EAFNOSUPPORT;
84	}
85	if (h->h_length != 4) {
86		warnx("address for `%s' has invalid length", name);
87		return EAFNOSUPPORT;
88	}
89	len = sizeof(struct sockaddr_in);
90	sinp = malloc(len);
91	if (sinp == NULL)
92		return ENOMEM;
93	bzero(sinp, len);
94	sinp->sin_len = len;
95	sinp->sin_family = h->h_addrtype;
96	memcpy(&sinp->sin_addr.s_addr, h->h_addr, 4);
97	sinp->sin_port = htons(SMB_TCP_PORT);
98	*dest = (struct sockaddr*)sinp;
99	return 0;
100}
101
102int
103nb_enum_if(struct nb_ifdesc **iflist, int maxif)
104{
105	struct ifconf ifc;
106	struct ifreq *ifrqp;
107	struct nb_ifdesc *ifd;
108	struct in_addr iaddr, imask;
109	char *ifrdata, *iname;
110	int s, rdlen, ifcnt, error, iflags, i;
111	size_t ifrlen;
112
113	*iflist = NULL;
114	s = socket(AF_INET, SOCK_DGRAM, 0);
115	if (s == -1)
116		return errno;
117
118	rdlen = maxif * sizeof(struct ifreq);
119	ifrdata = malloc(rdlen);
120	if (ifrdata == NULL) {
121		error = ENOMEM;
122		goto bad;
123	}
124	ifc.ifc_len = rdlen;
125	ifc.ifc_buf = ifrdata;
126	if (ioctl(s, SIOCGIFCONF, &ifc) != 0) {
127		error = errno;
128		goto bad;
129	}
130	ifrqp = ifc.ifc_req;
131	ifcnt = ifc.ifc_len / sizeof(struct ifreq);
132	error = 0;
133	for (i = 0; i < ifcnt; i++) {
134		ifrlen = sizeof(struct ifreq);
135		if (ifrqp->ifr_addr.sa_len > sizeof(struct sockaddr))
136			ifrlen += ifrqp->ifr_addr.sa_len
137				- sizeof(struct sockaddr);
138
139		if (ifrqp->ifr_addr.sa_family != AF_INET)
140			goto next;
141		iname = ifrqp->ifr_name;
142		if (strlen(iname) >= sizeof(ifd->id_name))
143			goto next;
144
145		iaddr = (*(struct sockaddr_in *)&ifrqp->ifr_addr).sin_addr;
146
147		if (ioctl(s, SIOCGIFNETMASK, ifrqp) != 0)
148			goto next;
149		imask = ((struct sockaddr_in *)&ifrqp->ifr_addr)->sin_addr;
150
151		if (ioctl(s, SIOCGIFFLAGS, ifrqp) != 0)
152			goto next;
153		iflags = ifrqp->ifr_flags;
154		if ((iflags & IFF_UP) == 0 || (iflags & IFF_BROADCAST) == 0)
155			goto next;
156
157		ifd = malloc(sizeof(struct nb_ifdesc));
158		if (ifd == NULL)
159			return ENOMEM;
160		bzero(ifd, sizeof(struct nb_ifdesc));
161		strcpy(ifd->id_name, iname);
162		ifd->id_flags = iflags;
163		ifd->id_addr = iaddr;
164		ifd->id_mask = imask;
165		ifd->id_next = *iflist;
166		*iflist = ifd;
167
168next:
169		ifrqp = (struct ifreq *)((caddr_t)ifrqp + ifrlen);
170	}
171bad:
172	free(ifrdata);
173	close(s);
174	return error;
175}
176
177/*ARGSUSED*/
178/*int
179nbns_resolvename(const char *name, struct sockaddr **dest)
180{
181	printf("NetBIOS name resolver is not included in this distribution.\n");
182	printf("Please use '-I' option to specify an IP address of server.\n");
183	return EHOSTUNREACH;
184}*/
185/*
186int
187nb_hostlookup(struct nb_name *np, const char *server, const char *hint,
188	struct sockaddr_nb **dst)
189{
190	struct sockaddr_nb *snb;
191	int error;
192
193	error = nb_sockaddr(NULL, np, &snb);
194	if (error)
195		return error;
196	do {
197		if (hint) {
198			error = nb_resolvehost_in(host, snb);
199			if (error)
200				break;
201		} else {
202			error = nb_resolvename(server);
203		}
204	} while(0);
205	if (!error) {
206		*dst = snb;
207	} else
208		nb_snbfree(snb);
209	return error;
210}
211*/
212