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Annotation of embedaddon/quagga/isisd/isis_dynhn.c, revision 1.1.1.1

1.1       misho       1: /*
                      2:  * IS-IS Rout(e)ing protocol - isis_dynhn.c
                      3:  *                             Dynamic hostname cache
                      4:  * Copyright (C) 2001,2002   Sampo Saaristo
                      5:  *                           Tampere University of Technology      
                      6:  *                           Institute of Communications Engineering
                      7:  *
                      8:  * This program is free software; you can redistribute it and/or modify it 
                      9:  * under the terms of the GNU General Public Licenseas published by the Free 
                     10:  * Software Foundation; either version 2 of the License, or (at your option) 
                     11:  * any later version.
                     12:  *
                     13:  * This program is distributed in the hope that it will be useful,but WITHOUT 
                     14:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 
                     15:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for 
                     16:  * more details.
                     17:  *
                     18:  * You should have received a copy of the GNU General Public License along 
                     19:  * with this program; if not, write to the Free Software Foundation, Inc., 
                     20:  * 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
                     21:  */
                     22: 
                     23: #include <zebra.h>
                     24: 
                     25: #include "vty.h"
                     26: #include "linklist.h"
                     27: #include "memory.h"
                     28: #include "log.h"
                     29: #include "stream.h"
                     30: #include "command.h"
                     31: #include "if.h"
                     32: #include "thread.h"
                     33: 
                     34: #include "isisd/dict.h"
                     35: #include "isisd/isis_constants.h"
                     36: #include "isisd/isis_common.h"
                     37: #include "isisd/isis_flags.h"
                     38: #include "isisd/isis_circuit.h"
                     39: #include "isisd/isisd.h"
                     40: #include "isisd/isis_dynhn.h"
                     41: #include "isisd/isis_misc.h"
                     42: #include "isisd/isis_constants.h"
                     43: 
                     44: extern struct isis *isis;
                     45: extern struct thread_master *master;
                     46: extern struct host host;
                     47: 
                     48: struct list *dyn_cache = NULL;
                     49: static int dyn_cache_cleanup (struct thread *);
                     50: 
                     51: void
                     52: dyn_cache_init (void)
                     53: {
                     54:   dyn_cache = list_new ();
                     55:   THREAD_TIMER_ON (master, isis->t_dync_clean, dyn_cache_cleanup, NULL, 120);
                     56:   return;
                     57: }
                     58: 
                     59: static int
                     60: dyn_cache_cleanup (struct thread *thread)
                     61: {
                     62:   struct listnode *node, *nnode;
                     63:   struct isis_dynhn *dyn;
                     64:   time_t now = time (NULL);
                     65: 
                     66:   isis->t_dync_clean = NULL;
                     67: 
                     68:   for (ALL_LIST_ELEMENTS (dyn_cache, node, nnode, dyn))
                     69:     {
                     70:       if ((now - dyn->refresh) < (MAX_AGE + 120))
                     71:        continue;
                     72: 
                     73:       list_delete_node (dyn_cache, node);
                     74:       XFREE (MTYPE_ISIS_DYNHN, dyn);
                     75:     }
                     76: 
                     77:   THREAD_TIMER_ON (master, isis->t_dync_clean, dyn_cache_cleanup, NULL, 120);
                     78:   return ISIS_OK;
                     79: }
                     80: 
                     81: struct isis_dynhn *
                     82: dynhn_find_by_id (u_char * id)
                     83: {
                     84:   struct listnode *node = NULL;
                     85:   struct isis_dynhn *dyn = NULL;
                     86: 
                     87:   for (ALL_LIST_ELEMENTS_RO (dyn_cache, node, dyn))
                     88:     if (memcmp (dyn->id, id, ISIS_SYS_ID_LEN) == 0)
                     89:       return dyn;
                     90: 
                     91:   return NULL;
                     92: }
                     93: 
                     94: void
                     95: isis_dynhn_insert (u_char * id, struct hostname *hostname, int level)
                     96: {
                     97:   struct isis_dynhn *dyn;
                     98: 
                     99:   dyn = dynhn_find_by_id (id);
                    100:   if (dyn)
                    101:     {
                    102:       memcpy (&dyn->name, hostname, hostname->namelen + 1);
                    103:       memcpy (dyn->id, id, ISIS_SYS_ID_LEN);
                    104:       dyn->refresh = time (NULL);
                    105:       return;
                    106:     }
                    107:   dyn = XCALLOC (MTYPE_ISIS_DYNHN, sizeof (struct isis_dynhn));
                    108:   if (!dyn)
                    109:     {
                    110:       zlog_warn ("isis_dynhn_insert(): out of memory!");
                    111:       return;
                    112:     }
                    113: 
                    114:   /* we also copy the length */
                    115:   memcpy (&dyn->name, hostname, hostname->namelen + 1);
                    116:   memcpy (dyn->id, id, ISIS_SYS_ID_LEN);
                    117:   dyn->refresh = time (NULL);
                    118:   dyn->level = level;
                    119: 
                    120:   listnode_add (dyn_cache, dyn);
                    121: 
                    122:   return;
                    123: }
                    124: 
                    125: /*
                    126:  * Level  System ID      Dynamic Hostname  (notag)
                    127:  *  2     0000.0000.0001 foo-gw
                    128:  *  2     0000.0000.0002 bar-gw
                    129:  *      * 0000.0000.0004 this-gw
                    130:  */
                    131: void
                    132: dynhn_print_all (struct vty *vty)
                    133: {
                    134:   struct listnode *node;
                    135:   struct isis_dynhn *dyn;
                    136: 
                    137:   vty_out (vty, "Level  System ID      Dynamic Hostname%s", VTY_NEWLINE);
                    138:   for (ALL_LIST_ELEMENTS_RO (dyn_cache, node, dyn))
                    139:     {
                    140:       vty_out (vty, "%-7d", dyn->level);
                    141:       vty_out (vty, "%-15s%-15s%s", sysid_print (dyn->id), dyn->name.name,
                    142:               VTY_NEWLINE);
                    143:     }
                    144: 
                    145:   vty_out (vty, "     * %s %s%s", sysid_print (isis->sysid), unix_hostname (),
                    146:           VTY_NEWLINE);
                    147:   return;
                    148: }