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