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