| 1 | /*
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| 2 | Unix SMB/CIFS implementation.
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| 3 | DNS utility library
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| 4 | Copyright (C) Gerald (Jerry) Carter 2006.
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| 5 | Copyright (C) Jeremy Allison 2007.
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| 6 |
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| 7 | This program is free software; you can redistribute it and/or modify
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| 8 | it under the terms of the GNU General Public License as published by
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| 9 | the Free Software Foundation; either version 3 of the License, or
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| 10 | (at your option) any later version.
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| 11 |
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| 12 | This program is distributed in the hope that it will be useful,
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| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 15 | GNU General Public License for more details.
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| 16 |
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| 17 | You should have received a copy of the GNU General Public License
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| 18 | along with this program. If not, see <http://www.gnu.org/licenses/>.
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| 19 | */
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| 20 |
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| 21 | #include "includes.h"
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| 22 | #include "libads/sitename_cache.h"
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| 23 |
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| 24 | /****************************************************************************
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| 25 | Store and fetch the AD client sitename.
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| 26 | ****************************************************************************/
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| 27 |
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| 28 | #define SITENAME_KEY "AD_SITENAME/DOMAIN/%s"
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| 29 |
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| 30 | static char *sitename_key(const char *realm)
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| 31 | {
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| 32 | char *keystr;
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| 33 |
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| 34 | if (asprintf_strupper_m(&keystr, SITENAME_KEY, realm) == -1) {
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| 35 | return NULL;
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| 36 | }
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| 37 |
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| 38 | return keystr;
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| 39 | }
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| 40 |
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| 41 |
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| 42 | /****************************************************************************
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| 43 | Store the AD client sitename.
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| 44 | We store indefinately as every new CLDAP query will re-write this.
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| 45 | ****************************************************************************/
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| 46 |
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| 47 | bool sitename_store(const char *realm, const char *sitename)
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| 48 | {
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| 49 | time_t expire;
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| 50 | bool ret = False;
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| 51 | char *key;
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| 52 |
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| 53 | if (!realm || (strlen(realm) == 0)) {
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| 54 | DEBUG(0,("sitename_store: no realm\n"));
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| 55 | return False;
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| 56 | }
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| 57 |
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| 58 | key = sitename_key(realm);
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| 59 |
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| 60 | if (!sitename || (sitename && !*sitename)) {
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| 61 | DEBUG(5,("sitename_store: deleting empty sitename!\n"));
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| 62 | ret = gencache_del(key);
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| 63 | SAFE_FREE(key);
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| 64 | return ret;
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| 65 | }
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| 66 |
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| 67 | expire = get_time_t_max(); /* Store indefinately. */
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| 68 |
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| 69 | DEBUG(10,("sitename_store: realm = [%s], sitename = [%s], expire = [%u]\n",
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| 70 | realm, sitename, (unsigned int)expire ));
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| 71 |
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| 72 | ret = gencache_set( key, sitename, expire );
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| 73 | SAFE_FREE(key);
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| 74 | return ret;
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| 75 | }
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| 76 |
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| 77 | /****************************************************************************
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| 78 | Fetch the AD client sitename.
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| 79 | Caller must free.
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| 80 | ****************************************************************************/
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| 81 |
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| 82 | char *sitename_fetch(TALLOC_CTX *mem_ctx, const char *realm)
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| 83 | {
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| 84 | char *sitename = NULL;
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| 85 | time_t timeout;
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| 86 | bool ret = False;
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| 87 | const char *query_realm;
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| 88 | char *key;
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| 89 |
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| 90 | if (!realm || (strlen(realm) == 0)) {
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| 91 | query_realm = lp_realm();
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| 92 | } else {
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| 93 | query_realm = realm;
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| 94 | }
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| 95 |
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| 96 | key = sitename_key(query_realm);
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| 97 |
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| 98 | ret = gencache_get( key, mem_ctx, &sitename, &timeout );
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| 99 | SAFE_FREE(key);
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| 100 | if ( !ret ) {
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| 101 | DEBUG(5,("sitename_fetch: No stored sitename for %s\n",
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| 102 | query_realm));
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| 103 | } else {
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| 104 | DEBUG(5,("sitename_fetch: Returning sitename for %s: \"%s\"\n",
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| 105 | query_realm, sitename ));
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| 106 | }
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| 107 | return sitename;
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| 108 | }
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| 109 |
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| 110 | /****************************************************************************
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| 111 | Did the sitename change ?
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| 112 | ****************************************************************************/
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| 113 |
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| 114 | bool stored_sitename_changed(const char *realm, const char *sitename)
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| 115 | {
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| 116 | bool ret = False;
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| 117 |
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| 118 | char *new_sitename;
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| 119 |
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| 120 | if (!realm || (strlen(realm) == 0)) {
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| 121 | DEBUG(0,("stored_sitename_changed: no realm\n"));
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| 122 | return False;
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| 123 | }
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| 124 |
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| 125 | new_sitename = sitename_fetch(talloc_tos(), realm);
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| 126 |
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| 127 | if (sitename && new_sitename && !strequal(sitename, new_sitename)) {
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| 128 | ret = True;
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| 129 | } else if ((sitename && !new_sitename) ||
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| 130 | (!sitename && new_sitename)) {
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| 131 | ret = True;
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| 132 | }
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| 133 | TALLOC_FREE(new_sitename);
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| 134 | return ret;
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| 135 | }
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| 136 |
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