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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 isis *isis;
extern struct thread_master *master;
extern struct host host;
struct list *dyn_cache = NULL;
static int dyn_cache_cleanup (struct thread *);
void
dyn_cache_init (void)
{
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_AGE + 120))
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 (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;
}
void
isis_dynhn_insert (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;
}
/*
* 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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