isisd/isis_dynhn.c

   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; see the file COPYING; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 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/isis_constants.h"
  35 #include "isisd/isis_common.h"
  36 #include "isisd/isis_flags.h"
  37 #include "isisd/isis_circuit.h"
  38 #include "isisd/isisd.h"
  39 #include "isisd/isis_dynhn.h"
  40 #include "isisd/isis_misc.h"
  41 #include "isisd/isis_constants.h"
  42
  43 extern struct host host;
  44
  45 struct list *dyn_cache = NULL;
  46 static int dyn_cache_cleanup(struct thread *);
  47
  48 void dyn_cache_init(struct isis *isis)
  49 {
  50         if (dyn_cache == NULL)
  51                 dyn_cache = list_new();
  52         if (!CHECK_FLAG(im->options, F_ISIS_UNIT_TEST))
  53                 thread_add_timer(master, dyn_cache_cleanup, isis, 120,
  54                                  &isis->t_dync_clean);
  55         return;
  56 }
  57
  58 void dyn_cache_cleanup_all(void)
  59 {
  60         struct listnode *node, *nnode;
  61         struct isis_dynhn *dyn;
  62
  63         for (ALL_LIST_ELEMENTS(dyn_cache, node, nnode, dyn)) {
  64                 list_delete_node(dyn_cache, node);
  65                 XFREE(MTYPE_ISIS_DYNHN, dyn);
  66         }
  67 }
  68
  69 static int dyn_cache_cleanup(struct thread *thread)
  70 {
  71         struct listnode *node, *nnode;
  72         struct isis_dynhn *dyn;
  73         time_t now = time(NULL);
  74         struct isis *isis = NULL;
  75
  76         isis = THREAD_ARG(thread);
  77
  78         isis->t_dync_clean = NULL;
  79
  80         for (ALL_LIST_ELEMENTS(dyn_cache, node, nnode, dyn)) {
  81                 if ((now - dyn->refresh) < MAX_LSP_LIFETIME)
  82                         continue;
  83                 list_delete_node(dyn_cache, node);
  84                 XFREE(MTYPE_ISIS_DYNHN, dyn);
  85         }
  86
  87         thread_add_timer(master, dyn_cache_cleanup, isis, 120,
  88                         &isis->t_dync_clean);
  89
  90         return ISIS_OK;
  91 }
  92
  93 struct isis_dynhn *dynhn_find_by_id(const uint8_t *id)
  94 {
  95         struct listnode *node = NULL;
  96         struct isis_dynhn *dyn = NULL;
  97
  98         for (ALL_LIST_ELEMENTS_RO(dyn_cache, node, dyn))
  99                 if (memcmp(dyn->id, id, ISIS_SYS_ID_LEN) == 0)
 100                         return dyn;
 101
 102         return NULL;
 103 }
 104
 105 struct isis_dynhn *dynhn_find_by_name(const char *hostname)
 106 {
 107         struct listnode *node = NULL;
 108         struct isis_dynhn *dyn = NULL;
 109
 110         for (ALL_LIST_ELEMENTS_RO(dyn_cache, node, dyn))
 111                 if (strncmp(dyn->hostname, hostname, 255) == 0)
 112                         return dyn;
 113
 114         return NULL;
 115 }
 116
 117 void isis_dynhn_insert(const uint8_t *id, const char *hostname, int level)
 118 {
 119         struct isis_dynhn *dyn;
 120
 121         dyn = dynhn_find_by_id(id);
 122         if (!dyn) {
 123                 dyn = XCALLOC(MTYPE_ISIS_DYNHN, sizeof(struct isis_dynhn));
 124                 memcpy(dyn->id, id, ISIS_SYS_ID_LEN);
 125                 dyn->level = level;
 126                 listnode_add(dyn_cache, dyn);
 127         }
 128
 129         snprintf(dyn->hostname, sizeof(dyn->hostname), "%s", hostname);
 130         dyn->refresh = time(NULL);
 131 }
 132
 133 void isis_dynhn_remove(const uint8_t *id)
 134 {
 135         struct isis_dynhn *dyn;
 136
 137         dyn = dynhn_find_by_id(id);
 138         if (!dyn)
 139                 return;
 140         listnode_delete(dyn_cache, dyn);
 141         XFREE(MTYPE_ISIS_DYNHN, dyn);
 142 }
 143
 144 /*
 145  * Level  System ID      Dynamic Hostname  (notag)
 146  *  2     0000.0000.0001 foo-gw
 147  *  2     0000.0000.0002 bar-gw
 148  *      * 0000.0000.0004 this-gw
 149  */
 150 void dynhn_print_all(struct vty *vty, struct isis *isis)
 151 {
 152         struct listnode *node;
 153         struct isis_dynhn *dyn;
 154
 155         vty_out(vty, "vrf     : %s\n", isis->name);
 156         if (!isis->sysid_set)
 157                 return;
 158         vty_out(vty, "Level  System ID      Dynamic Hostname\n");
 159         for (ALL_LIST_ELEMENTS_RO(dyn_cache, node, dyn)) {
 160                 vty_out(vty, "%-7d", dyn->level);
 161                 vty_out(vty, "%-15s%-15s\n", sysid_print(dyn->id),
 162                         dyn->hostname);
 163         }
 164
 165         vty_out(vty, "     * %s %s\n", sysid_print(isis->sysid),
 166                 cmd_hostname_get());
 167         return;
 168 }