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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; see the file COPYING; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 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_add_timer(master, dyn_cache_cleanup, NULL, 120,
&isis->t_dync_clean);
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_add_timer(master, dyn_cache_cleanup, NULL, 120,
&isis->t_dync_clean);
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(dyn->hostname, hostname, 255) == 0)
return dyn;
return NULL;
}
void isis_dynhn_insert(const u_char *id, const char *hostname, int level)
{
struct isis_dynhn *dyn;
dyn = dynhn_find_by_id(id);
if (!dyn) {
dyn = XCALLOC(MTYPE_ISIS_DYNHN, sizeof(struct isis_dynhn));
memcpy(dyn->id, id, ISIS_SYS_ID_LEN);
dyn->level = level;
listnode_add(dyn_cache, dyn);
}
snprintf(dyn->hostname, sizeof(dyn->hostname), "%s", hostname);
dyn->refresh = time(NULL);
}
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);
}
/*
* 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\n");
for (ALL_LIST_ELEMENTS_RO(dyn_cache, node, dyn)) {
vty_out(vty, "%-7d", dyn->level);
vty_out(vty, "%-15s%-15s\n", sysid_print(dyn->id),
dyn->hostname);
}
vty_out(vty, " * %s %s\n", sysid_print(isis->sysid),
unix_hostname());
return;
}
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