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
52 int
nb_ctx_create(struct nb_ctx ** ctxpp)53 nb_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
68 void
nb_ctx_done(struct nb_ctx * ctx)69 nb_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
77 int
nb_ctx_setns(struct nb_ctx * ctx,const char * addr)78 nb_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
89 int
nb_ctx_setscope(struct nb_ctx * ctx,const char * scope)90 nb_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
107 int
nb_ctx_resolve(struct nb_ctx * ctx)108 nb_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 */
142 int
nb_ctx_readrcsection(struct rcfile * rcfile,struct nb_ctx * ctx,const char * sname,int level)143 nb_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
166 static 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
175 static 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
183 const char *
nb_strerror(int error)184 nb_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