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, void *object)
  53 {
  54         struct access_list *alist;
  55
  56         alist = access_list_lookup(AFI_IP, (char *)rule);
  57         if (access_list_apply(alist, prefix) != FILTER_DENY)
  58                 return RMAP_MATCH;
  59
  60         return RMAP_NOMATCH;
  61 }
  62
  63 static void *route_match_ip_address_compile(const char *arg)
  64 {
  65         return XSTRDUP(MTYPE_ROUTE_MAP_COMPILED, arg);
  66 }
  67
  68 static void route_match_ip_address_free(void *rule)
  69 {
  70         XFREE(MTYPE_ROUTE_MAP_COMPILED, rule);
  71 }
  72
  73 static const struct route_map_rule_cmd route_match_ip_address_cmd = {
  74         "ip address",
  75         route_match_ip_address,
  76         route_match_ip_address_compile,
  77         route_match_ip_address_free
  78 };
  79
  80 /* ------------------------------------------------------------*/
  81
  82 static enum route_map_cmd_result_t
  83 route_match_ip_address_prefix_list(void *rule, const struct prefix *prefix,
  84                                    void *object)
  85 {
  86         struct prefix_list *plist;
  87
  88         plist = prefix_list_lookup(AFI_IP, (char *)rule);
  89         if (prefix_list_apply(plist, prefix) != PREFIX_DENY)
  90                 return RMAP_MATCH;
  91
  92         return RMAP_NOMATCH;
  93 }
  94
  95 static void *route_match_ip_address_prefix_list_compile(const char *arg)
  96 {
  97         return XSTRDUP(MTYPE_ROUTE_MAP_COMPILED, arg);
  98 }
  99
 100 static void route_match_ip_address_prefix_list_free(void *rule)
 101 {
 102         XFREE(MTYPE_ROUTE_MAP_COMPILED, rule);
 103 }
 104
 105 static const struct route_map_rule_cmd
 106                 route_match_ip_address_prefix_list_cmd = {
 107         "ip address prefix-list",
 108         route_match_ip_address_prefix_list,
 109         route_match_ip_address_prefix_list_compile,
 110         route_match_ip_address_prefix_list_free
 111 };
 112
 113 /* ------------------------------------------------------------*/
 114
 115 /* `match tag TAG' */
 116 /* Match function return 1 if match is success else return zero. */
 117 static enum route_map_cmd_result_t
 118 route_match_tag(void *rule, const struct prefix *p, void *object)
 119 {
 120         route_tag_t *tag;
 121         struct isis_ext_info *info;
 122         route_tag_t info_tag;
 123
 124         tag = rule;
 125         info = object;
 126
 127         info_tag = info->tag;
 128         if (info_tag == *tag)
 129                 return RMAP_MATCH;
 130         else
 131                 return RMAP_NOMATCH;
 132 }
 133
 134 /* Route map commands for tag matching. */
 135 static const struct route_map_rule_cmd route_match_tag_cmd = {
 136         "tag",
 137         route_match_tag,
 138         route_map_rule_tag_compile,
 139         route_map_rule_tag_free,
 140 };
 141
 142 /* ------------------------------------------------------------*/
 143
 144 static enum route_map_cmd_result_t
 145 route_match_ipv6_address(void *rule, const struct prefix *prefix, void *object)
 146 {
 147         struct access_list *alist;
 148
 149         alist = access_list_lookup(AFI_IP6, (char *)rule);
 150         if (access_list_apply(alist, prefix) != FILTER_DENY)
 151                 return RMAP_MATCH;
 152
 153         return RMAP_NOMATCH;
 154 }
 155
 156 static void *route_match_ipv6_address_compile(const char *arg)
 157 {
 158         return XSTRDUP(MTYPE_ROUTE_MAP_COMPILED, arg);
 159 }
 160
 161 static void route_match_ipv6_address_free(void *rule)
 162 {
 163         XFREE(MTYPE_ROUTE_MAP_COMPILED, rule);
 164 }
 165
 166 static const struct route_map_rule_cmd route_match_ipv6_address_cmd = {
 167         "ipv6 address",
 168         route_match_ipv6_address,
 169         route_match_ipv6_address_compile,
 170         route_match_ipv6_address_free
 171 };
 172
 173 /* ------------------------------------------------------------*/
 174
 175 static enum route_map_cmd_result_t
 176 route_match_ipv6_address_prefix_list(void *rule, const struct prefix *prefix,
 177                                      void *object)
 178 {
 179         struct prefix_list *plist;
 180
 181         plist = prefix_list_lookup(AFI_IP6, (char *)rule);
 182         if (prefix_list_apply(plist, prefix) != PREFIX_DENY)
 183                 return RMAP_MATCH;
 184
 185         return RMAP_NOMATCH;
 186 }
 187
 188 static void *route_match_ipv6_address_prefix_list_compile(const char *arg)
 189 {
 190         return XSTRDUP(MTYPE_ROUTE_MAP_COMPILED, arg);
 191 }
 192
 193 static void route_match_ipv6_address_prefix_list_free(void *rule)
 194 {
 195         XFREE(MTYPE_ROUTE_MAP_COMPILED, rule);
 196 }
 197
 198 static const struct route_map_rule_cmd
 199                 route_match_ipv6_address_prefix_list_cmd = {
 200         "ipv6 address prefix-list",
 201         route_match_ipv6_address_prefix_list,
 202         route_match_ipv6_address_prefix_list_compile,
 203         route_match_ipv6_address_prefix_list_free
 204 };
 205
 206 /* ------------------------------------------------------------*/
 207
 208 static enum route_map_cmd_result_t
 209 route_set_metric(void *rule, const struct prefix *prefix, void *object)
 210 {
 211         uint32_t *metric;
 212         struct isis_ext_info *info;
 213
 214         metric = rule;
 215         info = object;
 216
 217         info->metric = *metric;
 218
 219         return RMAP_OKAY;
 220 }
 221
 222 static void *route_set_metric_compile(const char *arg)
 223 {
 224         unsigned long metric;
 225         char *endp;
 226         uint32_t *ret;
 227
 228         metric = strtoul(arg, &endp, 10);
 229         if (arg[0] == '\0' || *endp != '\0' || metric > MAX_WIDE_PATH_METRIC)
 230                 return NULL;
 231
 232         ret = XCALLOC(MTYPE_ROUTE_MAP_COMPILED, sizeof(*ret));
 233         *ret = metric;
 234
 235         return ret;
 236 }
 237
 238 static void route_set_metric_free(void *rule)
 239 {
 240         XFREE(MTYPE_ROUTE_MAP_COMPILED, rule);
 241 }
 242
 243 static const struct route_map_rule_cmd route_set_metric_cmd = {
 244         "metric",
 245         route_set_metric,
 246         route_set_metric_compile,
 247         route_set_metric_free
 248 };
 249
 250 void isis_route_map_init(void)
 251 {
 252         route_map_init();
 253
 254         route_map_match_ip_address_hook(generic_match_add);
 255         route_map_no_match_ip_address_hook(generic_match_delete);
 256
 257         route_map_match_ip_address_prefix_list_hook(generic_match_add);
 258         route_map_no_match_ip_address_prefix_list_hook(generic_match_delete);
 259
 260         route_map_match_ipv6_address_hook(generic_match_add);
 261         route_map_no_match_ipv6_address_hook(generic_match_delete);
 262
 263         route_map_match_ipv6_address_prefix_list_hook(generic_match_add);
 264         route_map_no_match_ipv6_address_prefix_list_hook(generic_match_delete);
 265
 266         route_map_match_tag_hook(generic_match_add);
 267         route_map_no_match_tag_hook(generic_match_delete);
 268
 269         route_map_set_metric_hook(generic_set_add);
 270         route_map_no_set_metric_hook(generic_set_delete);
 271
 272         route_map_install_match(&route_match_ip_address_cmd);
 273         route_map_install_match(&route_match_ip_address_prefix_list_cmd);
 274         route_map_install_match(&route_match_ipv6_address_cmd);
 275         route_map_install_match(&route_match_ipv6_address_prefix_list_cmd);
 276         route_map_install_match(&route_match_tag_cmd);
 277         route_map_install_set(&route_set_metric_cmd);
 278 }