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 "dict.h"
  41 #include "isisd.h"
  42 #include "isis_misc.h"
  43 #include "isis_adjacency.h"
  44 #include "isis_circuit.h"
  45 #include "isis_pdu.h"
  46 #include "isis_lsp.h"
  47 #include "isis_spf.h"
  48 #include "isis_route.h"
  49 #include "isis_zebra.h"
  50 #include "isis_routemap.h"
  51
  52 static route_map_result_t route_match_ip_address(void *rule,
  53                                                  const struct prefix *prefix,
  54                                                  route_map_object_t type,
  55                                                  void *object)
  56 {
  57         struct access_list *alist;
  58
  59         if (type != RMAP_ISIS)
  60                 return RMAP_NOMATCH;
  61
  62         alist = access_list_lookup(AFI_IP, (char *)rule);
  63         if (access_list_apply(alist, prefix) != FILTER_DENY)
  64                 return RMAP_MATCH;
  65
  66         return RMAP_NOMATCH;
  67 }
  68
  69 static void *route_match_ip_address_compile(const char *arg)
  70 {
  71         return XSTRDUP(MTYPE_ROUTE_MAP_COMPILED, arg);
  72 }
  73
  74 static void route_match_ip_address_free(void *rule)
  75 {
  76         XFREE(MTYPE_ROUTE_MAP_COMPILED, rule);
  77 }
  78
  79 static struct route_map_rule_cmd route_match_ip_address_cmd = {
  80         "ip address", route_match_ip_address, route_match_ip_address_compile,
  81         route_match_ip_address_free};
  82
  83 /* ------------------------------------------------------------*/
  84
  85 static route_map_result_t
  86 route_match_ip_address_prefix_list(void *rule, const struct prefix *prefix,
  87                                    route_map_object_t type, void *object)
  88 {
  89         struct prefix_list *plist;
  90
  91         if (type != RMAP_ISIS)
  92                 return RMAP_NOMATCH;
  93
  94         plist = prefix_list_lookup(AFI_IP, (char *)rule);
  95         if (prefix_list_apply(plist, prefix) != PREFIX_DENY)
  96                 return RMAP_MATCH;
  97
  98         return RMAP_NOMATCH;
  99 }
 100
 101 static void *route_match_ip_address_prefix_list_compile(const char *arg)
 102 {
 103         return XSTRDUP(MTYPE_ROUTE_MAP_COMPILED, arg);
 104 }
 105
 106 static void route_match_ip_address_prefix_list_free(void *rule)
 107 {
 108         XFREE(MTYPE_ROUTE_MAP_COMPILED, rule);
 109 }
 110
 111 struct route_map_rule_cmd route_match_ip_address_prefix_list_cmd = {
 112         "ip address prefix-list", route_match_ip_address_prefix_list,
 113         route_match_ip_address_prefix_list_compile,
 114         route_match_ip_address_prefix_list_free};
 115
 116 /* ------------------------------------------------------------*/
 117
 118 static route_map_result_t route_match_ipv6_address(void *rule,
 119                                                    const struct prefix *prefix,
 120                                                    route_map_object_t type,
 121                                                    void *object)
 122 {
 123         struct access_list *alist;
 124
 125         if (type != RMAP_ISIS)
 126                 return RMAP_NOMATCH;
 127
 128         alist = access_list_lookup(AFI_IP6, (char *)rule);
 129         if (access_list_apply(alist, prefix) != FILTER_DENY)
 130                 return RMAP_MATCH;
 131
 132         return RMAP_NOMATCH;
 133 }
 134
 135 static void *route_match_ipv6_address_compile(const char *arg)
 136 {
 137         return XSTRDUP(MTYPE_ROUTE_MAP_COMPILED, arg);
 138 }
 139
 140 static void route_match_ipv6_address_free(void *rule)
 141 {
 142         XFREE(MTYPE_ROUTE_MAP_COMPILED, rule);
 143 }
 144
 145 static struct route_map_rule_cmd route_match_ipv6_address_cmd = {
 146         "ipv6 address", route_match_ipv6_address,
 147         route_match_ipv6_address_compile, route_match_ipv6_address_free};
 148
 149 /* ------------------------------------------------------------*/
 150
 151 static route_map_result_t
 152 route_match_ipv6_address_prefix_list(void *rule, const struct prefix *prefix,
 153                                      route_map_object_t type, void *object)
 154 {
 155         struct prefix_list *plist;
 156
 157         if (type != RMAP_ISIS)
 158                 return RMAP_NOMATCH;
 159
 160         plist = prefix_list_lookup(AFI_IP6, (char *)rule);
 161         if (prefix_list_apply(plist, prefix) != PREFIX_DENY)
 162                 return RMAP_MATCH;
 163
 164         return RMAP_NOMATCH;
 165 }
 166
 167 static void *route_match_ipv6_address_prefix_list_compile(const char *arg)
 168 {
 169         return XSTRDUP(MTYPE_ROUTE_MAP_COMPILED, arg);
 170 }
 171
 172 static void route_match_ipv6_address_prefix_list_free(void *rule)
 173 {
 174         XFREE(MTYPE_ROUTE_MAP_COMPILED, rule);
 175 }
 176
 177 struct route_map_rule_cmd route_match_ipv6_address_prefix_list_cmd = {
 178         "ipv6 address prefix-list", route_match_ipv6_address_prefix_list,
 179         route_match_ipv6_address_prefix_list_compile,
 180         route_match_ipv6_address_prefix_list_free};
 181
 182 /* ------------------------------------------------------------*/
 183
 184 static route_map_result_t route_set_metric(void *rule,
 185                                            const struct prefix *prefix,
 186                                            route_map_object_t type,
 187                                            void *object)
 188 {
 189         uint32_t *metric;
 190         struct isis_ext_info *info;
 191
 192         if (type == RMAP_ISIS) {
 193                 metric = rule;
 194                 info = object;
 195
 196                 info->metric = *metric;
 197         }
 198         return RMAP_OKAY;
 199 }
 200
 201 static void *route_set_metric_compile(const char *arg)
 202 {
 203         unsigned long metric;
 204         char *endp;
 205         uint32_t *ret;
 206
 207         metric = strtoul(arg, &endp, 10);
 208         if (arg[0] == '\0' || *endp != '\0' || metric > MAX_WIDE_PATH_METRIC)
 209                 return NULL;
 210
 211         ret = XCALLOC(MTYPE_ROUTE_MAP_COMPILED, sizeof(*ret));
 212         *ret = metric;
 213
 214         return ret;
 215 }
 216
 217 static void route_set_metric_free(void *rule)
 218 {
 219         XFREE(MTYPE_ROUTE_MAP_COMPILED, rule);
 220 }
 221
 222 static struct route_map_rule_cmd route_set_metric_cmd = {
 223         "metric", route_set_metric, route_set_metric_compile,
 224         route_set_metric_free};
 225
 226 void isis_route_map_init(void)
 227 {
 228         route_map_init();
 229
 230         route_map_match_ip_address_hook(generic_match_add);
 231         route_map_no_match_ip_address_hook(generic_match_delete);
 232
 233         route_map_match_ip_address_prefix_list_hook(generic_match_add);
 234         route_map_no_match_ip_address_prefix_list_hook(generic_match_delete);
 235
 236         route_map_match_ipv6_address_hook(generic_match_add);
 237         route_map_no_match_ipv6_address_hook(generic_match_delete);
 238
 239         route_map_match_ipv6_address_prefix_list_hook(generic_match_add);
 240         route_map_no_match_ipv6_address_prefix_list_hook(generic_match_delete);
 241
 242         route_map_set_metric_hook(generic_set_add);
 243         route_map_no_set_metric_hook(generic_set_delete);
 244
 245         route_map_install_match(&route_match_ip_address_cmd);
 246         route_map_install_match(&route_match_ip_address_prefix_list_cmd);
 247         route_map_install_match(&route_match_ipv6_address_cmd);
 248         route_map_install_match(&route_match_ipv6_address_prefix_list_cmd);
 249         route_map_install_set(&route_set_metric_cmd);
 250 }