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- /*
- * IS-IS Rout(e)ing protocol - isis_dynhn.c
- * Dynamic hostname cache
- * Copyright (C) 2001,2002 Sampo Saaristo
- * Tampere University of Technology
- * Institute of Communications Engineering
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public Licenseas 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.,
- * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- */
- #include <zebra.h>
- #include "vty.h"
- #include "linklist.h"
- #include "memory.h"
- #include "log.h"
- #include "stream.h"
- #include "command.h"
- #include "if.h"
- #include "thread.h"
- #include "isisd/dict.h"
- #include "isisd/isis_constants.h"
- #include "isisd/isis_common.h"
- #include "isisd/isis_flags.h"
- #include "isisd/isis_circuit.h"
- #include "isisd/isisd.h"
- #include "isisd/isis_dynhn.h"
- #include "isisd/isis_misc.h"
- #include "isisd/isis_constants.h"
- extern struct host host;
- struct list *dyn_cache = NULL;
- static int dyn_cache_cleanup (struct thread *);
- void
- dyn_cache_init (void)
- {
- if (dyn_cache == NULL)
- dyn_cache = list_new ();
- THREAD_TIMER_ON (master, isis->t_dync_clean, dyn_cache_cleanup, NULL, 120);
- return;
- }
- static int
- dyn_cache_cleanup (struct thread *thread)
- {
- struct listnode *node, *nnode;
- struct isis_dynhn *dyn;
- time_t now = time (NULL);
- isis->t_dync_clean = NULL;
- for (ALL_LIST_ELEMENTS (dyn_cache, node, nnode, dyn))
- {
- if ((now - dyn->refresh) < MAX_LSP_LIFETIME)
- continue;
- list_delete_node (dyn_cache, node);
- XFREE (MTYPE_ISIS_DYNHN, dyn);
- }
- THREAD_TIMER_ON (master, isis->t_dync_clean, dyn_cache_cleanup, NULL, 120);
- return ISIS_OK;
- }
- struct isis_dynhn *
- dynhn_find_by_id (const u_char * id)
- {
- struct listnode *node = NULL;
- struct isis_dynhn *dyn = NULL;
- for (ALL_LIST_ELEMENTS_RO (dyn_cache, node, dyn))
- if (memcmp (dyn->id, id, ISIS_SYS_ID_LEN) == 0)
- return dyn;
- return NULL;
- }
- struct isis_dynhn *
- dynhn_find_by_name (const char *hostname)
- {
- struct listnode *node = NULL;
- struct isis_dynhn *dyn = NULL;
- for (ALL_LIST_ELEMENTS_RO (dyn_cache, node, dyn))
- if (strncmp ((char *)dyn->name.name, hostname, 255) == 0)
- return dyn;
- return NULL;
- }
- void
- isis_dynhn_insert (const u_char * id, struct hostname *hostname, int level)
- {
- struct isis_dynhn *dyn;
- dyn = dynhn_find_by_id (id);
- if (dyn)
- {
- memcpy (&dyn->name, hostname, hostname->namelen + 1);
- memcpy (dyn->id, id, ISIS_SYS_ID_LEN);
- dyn->refresh = time (NULL);
- return;
- }
- dyn = XCALLOC (MTYPE_ISIS_DYNHN, sizeof (struct isis_dynhn));
- if (!dyn)
- {
- zlog_warn ("isis_dynhn_insert(): out of memory!");
- return;
- }
- /* we also copy the length */
- memcpy (&dyn->name, hostname, hostname->namelen + 1);
- memcpy (dyn->id, id, ISIS_SYS_ID_LEN);
- dyn->refresh = time (NULL);
- dyn->level = level;
- listnode_add (dyn_cache, dyn);
- return;
- }
- void
- isis_dynhn_remove (const u_char * id)
- {
- struct isis_dynhn *dyn;
- dyn = dynhn_find_by_id (id);
- if (!dyn)
- return;
- listnode_delete (dyn_cache, dyn);
- XFREE (MTYPE_ISIS_DYNHN, dyn);
- return;
- }
- /*
- * Level System ID Dynamic Hostname (notag)
- * 2 0000.0000.0001 foo-gw
- * 2 0000.0000.0002 bar-gw
- * * 0000.0000.0004 this-gw
- */
- void
- dynhn_print_all (struct vty *vty)
- {
- struct listnode *node;
- struct isis_dynhn *dyn;
- vty_out (vty, "Level System ID Dynamic Hostname%s", VTY_NEWLINE);
- for (ALL_LIST_ELEMENTS_RO (dyn_cache, node, dyn))
- {
- vty_out (vty, "%-7d", dyn->level);
- vty_out (vty, "%-15s%-15s%s", sysid_print (dyn->id), dyn->name.name,
- VTY_NEWLINE);
- }
- vty_out (vty, " * %s %s%s", sysid_print (isis->sysid), unix_hostname (),
- VTY_NEWLINE);
- return;
- }
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