1/*
2 * Copyright (c) 2000-2001, 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_name.c,v 1.2 2001/08/22 03:31:36 bp Exp $
33 */
34
35#include <sys/cdefs.h>
36__FBSDID("$FreeBSD$");
37
38#include <sys/param.h>
39#include <sys/endian.h>
40#include <sys/socket.h>
41
42#include <ctype.h>
43#include <err.h>
44#include <errno.h>
45#include <stdio.h>
46#include <stdlib.h>
47#include <string.h>
48
49#include <netsmb/netbios.h>
50#include <netsmb/smb_lib.h>
51#include <netsmb/nb_lib.h>
52
53int
54nb_snballoc(int namelen, struct sockaddr_nb **dst)
55{
56	struct sockaddr_nb *snb;
57	int slen;
58
59	slen = namelen + sizeof(*snb) - sizeof(snb->snb_name);
60	snb = malloc(slen);
61	if (snb == NULL)
62		return ENOMEM;
63	bzero(snb, slen);
64	snb->snb_family = AF_NETBIOS;
65	snb->snb_len = slen;
66	*dst = snb;
67	return 0;
68}
69
70void
71nb_snbfree(struct sockaddr *snb)
72{
73	free(snb);
74}
75
76/*
77 * Create a full NETBIOS address
78 */
79int
80nb_sockaddr(struct sockaddr *peer, struct nb_name *np,
81	struct sockaddr_nb **dst)
82
83{
84	struct sockaddr_nb *snb;
85	int nmlen, error;
86
87	if (peer && (peer->sa_family != AF_INET && peer->sa_family != AF_IPX))
88		return EPROTONOSUPPORT;
89	nmlen = nb_name_len(np);
90	if (nmlen < NB_ENCNAMELEN)
91		return EINVAL;
92	error = nb_snballoc(nmlen, &snb);
93	if (error)
94		return error;
95	if (nmlen != nb_name_encode(np, snb->snb_name))
96		printf("a bug somewhere in the nb_name* code\n");
97	if (peer)
98		memcpy(&snb->snb_tran, peer, peer->sa_len);
99	*dst = snb;
100	return 0;
101}
102
103int
104nb_name_len(struct nb_name *np)
105{
106	u_char *name;
107	int len, sclen;
108
109	len = 1 + NB_ENCNAMELEN;
110	if (np->nn_scope == NULL)
111		return len + 1;
112	sclen = 0;
113	for (name = np->nn_scope; *name; name++) {
114		if (*name == '.') {
115			sclen = 0;
116		} else {
117			if (sclen < NB_MAXLABLEN) {
118				sclen++;
119				len++;
120			}
121		}
122	}
123	return len + 1;
124}
125
126int
127nb_encname_len(const char *str)
128{
129	const u_char *cp = (const u_char *)str;
130	int len, blen;
131
132	if ((cp[0] & 0xc0) == 0xc0)
133		return -1;	/* first two bytes are offset to name */
134
135	len = 1;
136	for (;;) {
137		blen = *cp;
138		if (blen++ == 0)
139			break;
140		len += blen;
141		cp += blen;
142	}
143	return len;
144}
145
146static inline void
147nb_char_encode(u_char **ptr, u_char c, int n)
148{
149
150	while (n--) {
151		*(*ptr)++ = 0x41 + (c >> 4);
152		*(*ptr)++ = 0x41 + (c & 0x0f);
153	}
154}
155
156int
157nb_name_encode(struct nb_name *np, u_char *dst)
158{
159	u_char *name, *plen;
160	u_char *cp = dst;
161	int i, lblen;
162
163	*cp++ = NB_ENCNAMELEN;
164	name = np->nn_name;
165	if (name[0] == '*' && name[1] == 0) {
166		nb_char_encode(&cp, '*', 1);
167		nb_char_encode(&cp, ' ', NB_NAMELEN - 1);
168	} else {
169		for (i = 0; i < NB_NAMELEN - 1; i++)
170			if (*name != 0)
171				nb_char_encode(&cp, toupper(*name++), 1);
172			else
173				nb_char_encode(&cp, ' ', 1);
174		nb_char_encode(&cp, np->nn_type, 1);
175	}
176	*cp = 0;
177	if (np->nn_scope == NULL)
178		return nb_encname_len(dst);
179	plen = cp++;
180	lblen = 0;
181	for (name = np->nn_scope; ; name++) {
182		if (*name == '.' || *name == 0) {
183			*plen = lblen;
184			plen = cp++;
185			*plen = 0;
186			if (*name == 0)
187				break;
188		} else {
189			if (lblen < NB_MAXLABLEN) {
190				*cp++ = *name;
191				lblen++;
192			}
193		}
194	}
195	return nb_encname_len(dst);
196}
197
198