diff options
Diffstat (limited to 'source4')
| -rw-r--r-- | source4/libcli/namecache.c | 247 |
1 files changed, 0 insertions, 247 deletions
diff --git a/source4/libcli/namecache.c b/source4/libcli/namecache.c deleted file mode 100644 index 34df4a3c5f..0000000000 --- a/source4/libcli/namecache.c +++ /dev/null @@ -1,247 +0,0 @@ -/* - Unix SMB/CIFS implementation. - - NetBIOS name cache module on top of gencache mechanism. - - Copyright (C) Tim Potter 2002 - Copyright (C) Rafal Szczesniak 2002 - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. -*/ - -#include "includes.h" -#include "system/time.h" - -#define NBTKEY_FMT "NBT/%s#%02X" - - -/** - * Initialise namecache system. Function calls gencache - * initialisation function to perform necessary actions - * - * @return true upon successful initialisation of the cache or - * false on failure - **/ - -BOOL namecache_enableTODO(void) -{ - /* - * Check if name caching disabled by setting the name cache - * timeout to zero. - */ - - if (lp_name_cache_timeout() == 0) { - DEBUG(5, ("namecache_enable: disabling netbios name cache\n")); - return False; - } - - /* Init namecache by calling gencache initialisation */ - - if (!gencache_init()) { - DEBUG(2, ("namecache_enable: Couldn't initialise namecache on top of gencache.\n")); - return False; - } - - /* I leave it for now, though I don't think we really need this (mimir, 27.09.2002) */ - DEBUG(5, ("namecache_enable: enabling netbios namecache, timeout %d " - "seconds\n", lp_name_cache_timeout())); - - return True; -} - - -/** - * Shutdown namecache. Routine calls gencache close function - * to safely close gencache file. - * - * @return true upon successful shutdown of the cache or - * false on failure - **/ - -BOOL namecache_shutdownTODO(void) -{ - if (!gencache_shutdown()) { - DEBUG(2, ("namecache_shutdown: Couldn't close namecache on top of gencache.\n")); - return False; - } - - DEBUG(5, ("namecache_shutdown: netbios namecache closed successfully.\n")); - return True; -} - - -/** - * Generates a key for netbios name lookups on basis of - * netbios name and type. - * The caller must free returned key string when finished. - * - * @param name netbios name string (case insensitive) - * @param name_type netbios type of the name being looked up - * - * @return string consisted of uppercased name and appended - * type number - */ - -static char* namecache_key(TALLOC_CTX *mem_ctx, const char *name, int name_type) -{ - char *keystr; - asprintf(&keystr, NBTKEY_FMT, strupper_talloc(mem_ctx, name), name_type); - - return keystr; -} - - -/** - * Store a name(s) in the name cache - * - * @param name netbios names array - * @param name_type integer netbios name type - * @param num_names number of names being stored - * @param ip_list array of in_addr structures containing - * ip addresses being stored - **/ - -BOOL namecache_store(TALLOC_CTX *mem_ctx, const char *name, int name_type, - int num_names, struct ipv4_addr *ip_list) -{ - time_t expiry; - char *key, *value_string; - int i; - - /* - * we use gecache call to avoid annoying debug messages about - * initialised namecache again and again... - */ - if (!gencache_init()) return False; - - DEBUG(5, ("namecache_store: storing %d address%s for %s#%02x: ", - num_names, num_names == 1 ? "": "es", name, name_type)); - - for (i = 0; i < num_names; i++) - DEBUGADD(5, ("%s%s", sys_inet_ntoa(ip_list[i]), - i == (num_names - 1) ? "" : ", ")); - - DEBUGADD(5, ("\n")); - - key = namecache_key(mem_ctx, name, name_type); - - /* - * Cache pdc location or dc lists for only a little while - * otherwise if we lock on to a bad DC we can potentially be - * out of action for the entire cache timeout time! - */ - - if (name_type == 0x1b || name_type == 0x1c) - expiry = time(NULL) + 10; - else - expiry = time(NULL) + lp_name_cache_timeout(); - - /* - * Generate string representation of ip addresses list - * First, store the number of ip addresses and then - * place each single ip - */ - ipstr_list_make(&value_string, ip_list, num_names); - - /* set the entry */ - return (gencache_set(key, value_string, expiry)); -} - - -/** - * Look up a name in the cache. - * - * @param name netbios name to look up for - * @param name_type netbios name type of @param name - * @param ip_list mallocated list of IP addresses if found in the cache, - * NULL otherwise - * @param num_names number of entries found - * - * @return true upon successful fetch or - * false if name isn't found in the cache or has expired - **/ - -BOOL namecache_fetch(TALLOC_CTX *mem_ctx, const char *name, int name_type, struct ipv4_addr **ip_list, - int *num_names) -{ - char *key, *value; - time_t timeout; - - *num_names = 0; - - /* exit now if null pointers were passed as they're required further */ - if (!ip_list || !num_names) return False; - - if (!gencache_init()) - return False; - - /* - * Use gencache interface - lookup the key - */ - key = namecache_key(mem_ctx, name, name_type); - - if (!gencache_get(key, &value, &timeout)) { - DEBUG(5, ("no entry for %s#%02X found.\n", name, name_type)); - SAFE_FREE(key); - return False; - } else { - DEBUG(5, ("name %s#%02X found.\n", name, name_type)); - } - - /* - * Split up the stored value into the list of IP adresses - */ - *num_names = ipstr_list_parse(value, ip_list); - - SAFE_FREE(key); - SAFE_FREE(value); - return *num_names > 0; /* true only if some ip has been fetched */ -} - - -/** - * Delete single namecache entry. Look at the - * gencache_iterate definition. - * - **/ - -static void flush_netbios_name(const char* key, const char *value, time_t timeout, void* dptr) -{ - gencache_del(key); - DEBUG(5, ("Deleting entry %s\n", key)); -} - - -/** - * Flush all names from the name cache. - * It's done by gencache_iterate() - * - * @return True upon successful deletion or - * False in case of an error - **/ - -void namecache_flush(void) -{ - if (!gencache_init()) - return; - - /* - * iterate through each NBT cache's entry and flush it - * by flush_netbios_name function - */ - gencache_iterate(flush_netbios_name, NULL, "NBT/*"); - DEBUG(5, ("Namecache flushed\n")); -} - |