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