2 * Copyright (C) 2004 Internet Systems Consortium, Inc. ("ISC")
3 * Copyright (C) 2001-2003 Internet Software Consortium.
5 * Permission to use, copy, modify, and distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
9 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
10 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
11 * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
12 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
13 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
14 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
15 * PERFORMANCE OF THIS SOFTWARE.
18 /* $Id: builtin.c,v 1.4.106.4 2004/03/08 04:04:18 marka Exp $ */
21 * The built-in "version", "hostname", "id" and "authors" databases.
29 #include <isc/print.h>
30 #include <isc/result.h>
34 #include <dns/result.h>
36 #include <named/builtin.h>
37 #include <named/globals.h>
38 #include <named/server.h>
41 typedef struct builtin builtin_t;
43 static isc_result_t do_version_lookup(dns_sdblookup_t *lookup);
44 static isc_result_t do_hostname_lookup(dns_sdblookup_t *lookup);
45 static isc_result_t do_authors_lookup(dns_sdblookup_t *lookup);
46 static isc_result_t do_id_lookup(dns_sdblookup_t *lookup);
49 * We can't use function pointers as the db_data directly
50 * because ANSI C does not guarantee that function pointers
51 * can safely be cast to void pointers and back.
55 isc_result_t (*do_lookup)(dns_sdblookup_t *lookup);
58 static builtin_t version_builtin = { do_version_lookup };
59 static builtin_t hostname_builtin = { do_hostname_lookup };
60 static builtin_t authors_builtin = { do_authors_lookup };
61 static builtin_t id_builtin = { do_id_lookup };
63 static dns_sdbimplementation_t *builtin_impl;
66 builtin_lookup(const char *zone, const char *name, void *dbdata,
67 dns_sdblookup_t *lookup)
69 builtin_t *b = (builtin_t *) dbdata;
73 if (strcmp(name, "@") == 0)
74 return (b->do_lookup(lookup));
76 return (ISC_R_NOTFOUND);
80 put_txt(dns_sdblookup_t *lookup, const char *text) {
81 unsigned char buf[256];
82 unsigned int len = strlen(text);
84 len = 255; /* Silently truncate */
86 memcpy(&buf[1], text, len);
87 return (dns_sdb_putrdata(lookup, dns_rdatatype_txt, 0, buf, len + 1));
91 do_version_lookup(dns_sdblookup_t *lookup) {
92 if (ns_g_server->version_set) {
93 if (ns_g_server->version == NULL)
94 return (ISC_R_SUCCESS);
96 return (put_txt(lookup, ns_g_server->version));
98 return (put_txt(lookup, ns_g_version));
103 do_hostname_lookup(dns_sdblookup_t *lookup) {
104 if (ns_g_server->hostname_set) {
105 if (ns_g_server->hostname == NULL)
106 return (ISC_R_SUCCESS);
108 return (put_txt(lookup, ns_g_server->hostname));
111 isc_result_t result = ns_os_gethostname(buf, sizeof(buf));
112 if (result != ISC_R_SUCCESS)
114 return (put_txt(lookup, buf));
119 do_authors_lookup(dns_sdblookup_t *lookup) {
122 static const char *authors[] = {
127 "Andreas Gustafsson",
139 * If a version string is specified, disable the authors.bind zone.
141 if (ns_g_server->version_set)
142 return (ISC_R_SUCCESS);
144 for (p = authors; *p != NULL; p++) {
145 result = put_txt(lookup, *p);
146 if (result != ISC_R_SUCCESS)
149 return (ISC_R_SUCCESS);
153 do_id_lookup(dns_sdblookup_t *lookup) {
155 if (ns_g_server->server_usehostname) {
157 isc_result_t result = ns_os_gethostname(buf, sizeof(buf));
158 if (result != ISC_R_SUCCESS)
160 return (put_txt(lookup, buf));
163 if (ns_g_server->server_id == NULL)
164 return (ISC_R_SUCCESS);
166 return (put_txt(lookup, ns_g_server->server_id));
170 builtin_authority(const char *zone, void *dbdata, dns_sdblookup_t *lookup) {
176 result = dns_sdb_putsoa(lookup, "@", "hostmaster", 0);
177 if (result != ISC_R_SUCCESS)
178 return (ISC_R_FAILURE);
179 result = dns_sdb_putrr(lookup, "ns", 0, "@");
180 if (result != ISC_R_SUCCESS)
181 return (ISC_R_FAILURE);
183 return (ISC_R_SUCCESS);
187 builtin_create(const char *zone, int argc, char **argv,
188 void *driverdata, void **dbdata)
193 return (DNS_R_SYNTAX);
194 if (strcmp(argv[0], "version") == 0)
195 *dbdata = &version_builtin;
196 else if (strcmp(argv[0], "hostname") == 0)
197 *dbdata = &hostname_builtin;
198 else if (strcmp(argv[0], "authors") == 0)
199 *dbdata = &authors_builtin;
200 else if (strcmp(argv[0], "id") == 0)
201 *dbdata = &id_builtin;
203 return (ISC_R_NOTIMPLEMENTED);
204 return (ISC_R_SUCCESS);
207 static dns_sdbmethods_t builtin_methods = {
216 ns_builtin_init(void) {
217 RUNTIME_CHECK(dns_sdb_register("_builtin", &builtin_methods, NULL,
218 DNS_SDBFLAG_RELATIVEOWNER |
219 DNS_SDBFLAG_RELATIVERDATA,
220 ns_g_mctx, &builtin_impl)
222 return (ISC_R_SUCCESS);
226 ns_builtin_deinit(void) {
227 dns_sdb_unregister(&builtin_impl);