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.c,v 1.4 2001/04/16 04:33:01 bp Exp $
33 * $FreeBSD$
34 */
35#include <sys/param.h>
36#include <sys/socket.h>
37
38#include <ctype.h>
39#include <netdb.h>
40#include <err.h>
41#include <errno.h>
42#include <stdlib.h>
43#include <string.h>
44#include <stdio.h>
45#include <unistd.h>
46#include <cflib.h>
47
48#include <netsmb/netbios.h>
49#include <netsmb/smb_lib.h>
50#include <netsmb/nb_lib.h>
51
52int
53nb_ctx_create(struct nb_ctx **ctxpp)
54{
55	struct nb_ctx *ctx;
56
57	ctx = malloc(sizeof(struct nb_ctx));
58	if (ctx == NULL)
59		return ENOMEM;
60	bzero(ctx, sizeof(struct nb_ctx));
61	ctx->nb_nmbtcpport = NMB_TCP_PORT;
62	ctx->nb_smbtcpport = SMB_TCP_PORT;
63
64	*ctxpp = ctx;
65	return 0;
66}
67
68void
69nb_ctx_done(struct nb_ctx *ctx)
70{
71	if (ctx == NULL)
72		return;
73	if (ctx->nb_scope)
74		free(ctx->nb_scope);
75}
76
77int
78nb_ctx_setns(struct nb_ctx *ctx, const char *addr)
79{
80	if (addr == NULL || addr[0] == 0)
81		return EINVAL;
82	if (ctx->nb_nsname)
83		free(ctx->nb_nsname);
84	if ((ctx->nb_nsname = strdup(addr)) == NULL)
85		return ENOMEM;
86	return 0;
87}
88
89int
90nb_ctx_setscope(struct nb_ctx *ctx, const char *scope)
91{
92	size_t slen = strlen(scope);
93
94	if (slen >= 128) {
95		smb_error("scope '%s' is too long", 0, scope);
96		return ENAMETOOLONG;
97	}
98	if (ctx->nb_scope)
99		free(ctx->nb_scope);
100	ctx->nb_scope = malloc(slen + 1);
101	if (ctx->nb_scope == NULL)
102		return ENOMEM;
103	nls_str_upper(ctx->nb_scope, scope);
104	return 0;
105}
106
107int
108nb_ctx_resolve(struct nb_ctx *ctx)
109{
110	struct sockaddr *sap;
111	int error;
112
113	ctx->nb_flags &= ~NBCF_RESOLVED;
114
115	if (ctx->nb_nsname == NULL) {
116		ctx->nb_ns.sin_addr.s_addr = htonl(INADDR_BROADCAST);
117	} else {
118		error = nb_resolvehost_in(ctx->nb_nsname, &sap, ctx->nb_smbtcpport);
119		if (error) {
120			smb_error("can't resolve %s", error, ctx->nb_nsname);
121			return error;
122		}
123		if (sap->sa_family != AF_INET) {
124			smb_error("unsupported address family %d", 0, sap->sa_family);
125			return EINVAL;
126		}
127		bcopy(sap, &ctx->nb_ns, sizeof(ctx->nb_ns));
128		free(sap);
129	}
130	ctx->nb_ns.sin_port = htons(ctx->nb_nmbtcpport);
131	ctx->nb_ns.sin_family = AF_INET;
132	ctx->nb_ns.sin_len = sizeof(ctx->nb_ns);
133	ctx->nb_flags |= NBCF_RESOLVED;
134	return 0;
135}
136
137/*
138 * used level values:
139 * 0 - default
140 * 1 - server
141 */
142int
143nb_ctx_readrcsection(struct rcfile *rcfile, struct nb_ctx *ctx,
144	const char *sname, int level)
145{
146	char *p;
147	int error;
148
149	if (level > 1)
150		return EINVAL;
151	rc_getint(rcfile, sname, "nbtimeout", &ctx->nb_timo);
152	rc_getstringptr(rcfile, sname, "nbns", &p);
153	if (p) {
154		error = nb_ctx_setns(ctx, p);
155		if (error) {
156			smb_error("invalid address specified in the section %s", 0, sname);
157			return error;
158		}
159	}
160	rc_getstringptr(rcfile, sname, "nbscope", &p);
161	if (p)
162		nb_ctx_setscope(ctx, p);
163	return 0;
164}
165
166static const char *nb_err_rcode[] = {
167	"bad request/response format",
168	"NBNS server failure",
169	"no such name",
170	"unsupported request",
171	"request rejected",
172	"name already registered"
173};
174
175static const char *nb_err[] = {
176	"host not found",
177	"too many redirects",
178	"invalid response",
179	"NETBIOS name too long",
180	"no interface to broadcast on and no NBNS server specified"
181};
182
183const char *
184nb_strerror(int error)
185{
186	if (error == 0)
187		return NULL;
188	if (error <= NBERR_ACTIVE)
189		return nb_err_rcode[error - 1];
190	else if (error >= NBERR_HOSTNOTFOUND && error < NBERR_MAX)
191		return nb_err[error - NBERR_HOSTNOTFOUND];
192	else
193		return NULL;
194}
195
196