isisd/isis_routemap.c

   1 /*
   2  * IS-IS Rout(e)ing protocol - isis_routemap.c
   3  *
   4  * Copyright (C) 2013-2015 Christian Franke <chris@opensourcerouting.org>
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License as published by the Free
   8  * Software Foundation; either version 2 of the License, or (at your option)
   9  * any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  14  * more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along
  17  * with this program; see the file COPYING; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  19  */
  20
  21 #include <zebra.h>
  22
  23 #include "command.h"
  24 #include "filter.h"
  25 #include "hash.h"
  26 #include "if.h"
  27 #include "linklist.h"
  28 #include "log.h"
  29 #include "memory.h"
  30 #include "prefix.h"
  31 #include "plist.h"
  32 #include "routemap.h"
  33 #include "table.h"
  34 #include "thread.h"
  35 #include "vty.h"
  36
  37 #include "isis_constants.h"
  38 #include "isis_common.h"
  39 #include "isis_flags.h"
  40 #include "isisd.h"
  41 #include "isis_misc.h"
  42 #include "isis_adjacency.h"
  43 #include "isis_circuit.h"
  44 #include "isis_pdu.h"
  45 #include "isis_lsp.h"
  46 #include "isis_spf.h"
  47 #include "isis_route.h"
  48 #include "isis_zebra.h"
  49 #include "isis_routemap.h"
  50
  51 static enum route_map_cmd_result_t
  52 route_match_ip_address(void *rule, const struct prefix *prefix,
  53                        route_map_object_t type, void *object)
  54 {
  55         struct access_list *alist;
  56
  57         if (type != RMAP_ISIS)
  58                 return RMAP_NOMATCH;
  59
  60         alist = access_list_lookup(AFI_IP, (char *)rule);
  61         if (access_list_apply(alist, prefix) != FILTER_DENY)
  62                 return RMAP_MATCH;
  63
  64         return RMAP_NOMATCH;
  65 }
  66
  67 static void *route_match_ip_address_compile(const char *arg)
  68 {
  69         return XSTRDUP(MTYPE_ROUTE_MAP_COMPILED, arg);
  70 }
  71
  72 static void route_match_ip_address_free(void *rule)
  73 {
  74         XFREE(MTYPE_ROUTE_MAP_COMPILED, rule);
  75 }
  76
  77 static const struct route_map_rule_cmd route_match_ip_address_cmd = {
  78         "ip address",
  79         route_match_ip_address,
  80         route_match_ip_address_compile,
  81         route_match_ip_address_free
  82 };
  83
  84 /* ------------------------------------------------------------*/
  85
  86 static enum route_map_cmd_result_t
  87 route_match_ip_address_prefix_list(void *rule, const struct prefix *prefix,
  88                                    route_map_object_t type, void *object)
  89 {
  90         struct prefix_list *plist;
  91
  92         if (type != RMAP_ISIS)
  93                 return RMAP_NOMATCH;
  94
  95         plist = prefix_list_lookup(AFI_IP, (char *)rule);
  96         if (prefix_list_apply(plist, prefix) != PREFIX_DENY)
  97                 return RMAP_MATCH;
  98
  99         return RMAP_NOMATCH;
 100 }
 101
 102 static void *route_match_ip_address_prefix_list_compile(const char *arg)
 103 {
 104         return XSTRDUP(MTYPE_ROUTE_MAP_COMPILED, arg);
 105 }
 106
 107 static void route_match_ip_address_prefix_list_free(void *rule)
 108 {
 109         XFREE(MTYPE_ROUTE_MAP_COMPILED, rule);
 110 }
 111
 112 static const struct route_map_rule_cmd
 113                 route_match_ip_address_prefix_list_cmd = {
 114         "ip address prefix-list",
 115         route_match_ip_address_prefix_list,
 116         route_match_ip_address_prefix_list_compile,
 117         route_match_ip_address_prefix_list_free
 118 };
 119
 120 /* ------------------------------------------------------------*/
 121
 122 static enum route_map_cmd_result_t
 123 route_match_ipv6_address(void *rule, const struct prefix *prefix,
 124                          route_map_object_t type, void *object)
 125 {
 126         struct access_list *alist;
 127
 128         if (type != RMAP_ISIS)
 129                 return RMAP_NOMATCH;
 130
 131         alist = access_list_lookup(AFI_IP6, (char *)rule);
 132         if (access_list_apply(alist, prefix) != FILTER_DENY)
 133                 return RMAP_MATCH;
 134
 135         return RMAP_NOMATCH;
 136 }
 137
 138 static void *route_match_ipv6_address_compile(const char *arg)
 139 {
 140         return XSTRDUP(MTYPE_ROUTE_MAP_COMPILED, arg);
 141 }
 142
 143 static void route_match_ipv6_address_free(void *rule)
 144 {
 145         XFREE(MTYPE_ROUTE_MAP_COMPILED, rule);
 146 }
 147
 148 static const struct route_map_rule_cmd route_match_ipv6_address_cmd = {
 149         "ipv6 address",
 150         route_match_ipv6_address,
 151         route_match_ipv6_address_compile,
 152         route_match_ipv6_address_free
 153 };
 154
 155 /* ------------------------------------------------------------*/
 156
 157 static enum route_map_cmd_result_t
 158 route_match_ipv6_address_prefix_list(void *rule, const struct prefix *prefix,
 159                                      route_map_object_t type, void *object)
 160 {
 161         struct prefix_list *plist;
 162
 163         if (type != RMAP_ISIS)
 164                 return RMAP_NOMATCH;
 165
 166         plist = prefix_list_lookup(AFI_IP6, (char *)rule);
 167         if (prefix_list_apply(plist, prefix) != PREFIX_DENY)
 168                 return RMAP_MATCH;
 169
 170         return RMAP_NOMATCH;
 171 }
 172
 173 static void *route_match_ipv6_address_prefix_list_compile(const char *arg)
 174 {
 175         return XSTRDUP(MTYPE_ROUTE_MAP_COMPILED, arg);
 176 }
 177
 178 static void route_match_ipv6_address_prefix_list_free(void *rule)
 179 {
 180         XFREE(MTYPE_ROUTE_MAP_COMPILED, rule);
 181 }
 182
 183 static const struct route_map_rule_cmd
 184                 route_match_ipv6_address_prefix_list_cmd = {
 185         "ipv6 address prefix-list",
 186         route_match_ipv6_address_prefix_list,
 187         route_match_ipv6_address_prefix_list_compile,
 188         route_match_ipv6_address_prefix_list_free
 189 };
 190
 191 /* ------------------------------------------------------------*/
 192
 193 static enum route_map_cmd_result_t
 194 route_set_metric(void *rule, const struct prefix *prefix,
 195                  route_map_object_t type, void *object)
 196 {
 197         uint32_t *metric;
 198         struct isis_ext_info *info;
 199
 200         if (type == RMAP_ISIS) {
 201                 metric = rule;
 202                 info = object;
 203
 204                 info->metric = *metric;
 205         }
 206         return RMAP_OKAY;
 207 }
 208
 209 static void *route_set_metric_compile(const char *arg)
 210 {
 211         unsigned long metric;
 212         char *endp;
 213         uint32_t *ret;
 214
 215         metric = strtoul(arg, &endp, 10);
 216         if (arg[0] == '\0' || *endp != '\0' || metric > MAX_WIDE_PATH_METRIC)
 217                 return NULL;
 218
 219         ret = XCALLOC(MTYPE_ROUTE_MAP_COMPILED, sizeof(*ret));
 220         *ret = metric;
 221
 222         return ret;
 223 }
 224
 225 static void route_set_metric_free(void *rule)
 226 {
 227         XFREE(MTYPE_ROUTE_MAP_COMPILED, rule);
 228 }
 229
 230 static const struct route_map_rule_cmd route_set_metric_cmd = {
 231         "metric",
 232         route_set_metric,
 233         route_set_metric_compile,
 234         route_set_metric_free
 235 };
 236
 237 void isis_route_map_init(void)
 238 {
 239         route_map_init();
 240
 241         route_map_match_ip_address_hook(generic_match_add);
 242         route_map_no_match_ip_address_hook(generic_match_delete);
 243
 244         route_map_match_ip_address_prefix_list_hook(generic_match_add);
 245         route_map_no_match_ip_address_prefix_list_hook(generic_match_delete);
 246
 247         route_map_match_ipv6_address_hook(generic_match_add);
 248         route_map_no_match_ipv6_address_hook(generic_match_delete);
 249
 250         route_map_match_ipv6_address_prefix_list_hook(generic_match_add);
 251         route_map_no_match_ipv6_address_prefix_list_hook(generic_match_delete);
 252
 253         route_map_set_metric_hook(generic_set_add);
 254         route_map_no_set_metric_hook(generic_set_delete);
 255
 256         route_map_install_match(&route_match_ip_address_cmd);
 257         route_map_install_match(&route_match_ip_address_prefix_list_cmd);
 258         route_map_install_match(&route_match_ipv6_address_cmd);
 259         route_map_install_match(&route_match_ipv6_address_prefix_list_cmd);
 260         route_map_install_set(&route_set_metric_cmd);
 261 }