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718e3744 | 1 | /* RIPng routemap. |
2 | * Copyright (C) 1999 Kunihiro Ishiguro | |
3 | * | |
4 | * This file is part of GNU Zebra. | |
5 | * | |
6 | * GNU Zebra 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 | |
8 | * Free Software Foundation; either version 2, or (at your option) any | |
9 | * later version. | |
10 | * | |
11 | * GNU Zebra is distributed in the hope that it will be useful, but | |
12 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * General Public License for more details. | |
15 | * | |
896014f4 DL |
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 | |
718e3744 | 19 | */ |
20 | ||
21 | #include <zebra.h> | |
22 | ||
23 | #include "if.h" | |
24 | #include "memory.h" | |
25 | #include "prefix.h" | |
82f97584 | 26 | #include "vty.h" |
718e3744 | 27 | #include "routemap.h" |
28 | #include "command.h" | |
a94434b6 | 29 | #include "sockunion.h" |
718e3744 | 30 | |
31 | #include "ripngd/ripngd.h" | |
6b0655a2 | 32 | |
d62a17ae | 33 | struct rip_metric_modifier { |
34 | enum { metric_increment, metric_decrement, metric_absolute } type; | |
6a74c5f9 | 35 | bool used; |
d7c0a89a | 36 | uint8_t metric; |
a94434b6 | 37 | }; |
38 | ||
a94434b6 | 39 | /* `match metric METRIC' */ |
40 | /* Match function return 1 if match is success else return zero. */ | |
123214ef MS |
41 | static route_map_result_t route_match_metric(void *rule, |
42 | const struct prefix *prefix, | |
d62a17ae | 43 | route_map_object_t type, |
44 | void *object) | |
a94434b6 | 45 | { |
d7c0a89a | 46 | uint32_t *metric; |
d62a17ae | 47 | struct ripng_info *rinfo; |
48 | ||
49 | if (type == RMAP_RIPNG) { | |
50 | metric = rule; | |
51 | rinfo = object; | |
52 | ||
53 | if (rinfo->metric == *metric) | |
54 | return RMAP_MATCH; | |
55 | else | |
56 | return RMAP_NOMATCH; | |
57 | } | |
a94434b6 | 58 | return RMAP_NOMATCH; |
a94434b6 | 59 | } |
60 | ||
61 | /* Route map `match metric' match statement. `arg' is METRIC value */ | |
d62a17ae | 62 | static void *route_match_metric_compile(const char *arg) |
a94434b6 | 63 | { |
d7c0a89a | 64 | uint32_t *metric; |
a94434b6 | 65 | |
d7c0a89a | 66 | metric = XMALLOC(MTYPE_ROUTE_MAP_COMPILED, sizeof(uint32_t)); |
d62a17ae | 67 | *metric = atoi(arg); |
a94434b6 | 68 | |
d62a17ae | 69 | if (*metric > 0) |
70 | return metric; | |
a94434b6 | 71 | |
d62a17ae | 72 | XFREE(MTYPE_ROUTE_MAP_COMPILED, metric); |
73 | return NULL; | |
a94434b6 | 74 | } |
75 | ||
76 | /* Free route map's compiled `match metric' value. */ | |
d62a17ae | 77 | static void route_match_metric_free(void *rule) |
a94434b6 | 78 | { |
d62a17ae | 79 | XFREE(MTYPE_ROUTE_MAP_COMPILED, rule); |
a94434b6 | 80 | } |
81 | ||
82 | /* Route map commands for metric matching. */ | |
d62a17ae | 83 | static struct route_map_rule_cmd route_match_metric_cmd = { |
84 | "metric", route_match_metric, route_match_metric_compile, | |
85 | route_match_metric_free}; | |
6b0655a2 | 86 | |
718e3744 | 87 | /* `match interface IFNAME' */ |
a94434b6 | 88 | /* Match function return 1 if match is success else return zero. */ |
d62a17ae | 89 | static route_map_result_t route_match_interface(void *rule, |
123214ef | 90 | const struct prefix *prefix, |
d62a17ae | 91 | route_map_object_t type, |
92 | void *object) | |
718e3744 | 93 | { |
d62a17ae | 94 | struct ripng_info *rinfo; |
95 | struct interface *ifp; | |
96 | char *ifname; | |
718e3744 | 97 | |
d62a17ae | 98 | if (type == RMAP_RIPNG) { |
99 | ifname = rule; | |
100 | ifp = if_lookup_by_name(ifname, VRF_DEFAULT); | |
718e3744 | 101 | |
d62a17ae | 102 | if (!ifp) |
103 | return RMAP_NOMATCH; | |
718e3744 | 104 | |
d62a17ae | 105 | rinfo = object; |
718e3744 | 106 | |
d62a17ae | 107 | if (rinfo->ifindex == ifp->ifindex) |
108 | return RMAP_MATCH; | |
109 | else | |
110 | return RMAP_NOMATCH; | |
111 | } | |
a94434b6 | 112 | return RMAP_NOMATCH; |
718e3744 | 113 | } |
114 | ||
a94434b6 | 115 | /* Route map `match interface' match statement. `arg' is IFNAME value */ |
d62a17ae | 116 | static void *route_match_interface_compile(const char *arg) |
718e3744 | 117 | { |
d62a17ae | 118 | return XSTRDUP(MTYPE_ROUTE_MAP_COMPILED, arg); |
718e3744 | 119 | } |
120 | ||
d62a17ae | 121 | static void route_match_interface_free(void *rule) |
718e3744 | 122 | { |
d62a17ae | 123 | XFREE(MTYPE_ROUTE_MAP_COMPILED, rule); |
718e3744 | 124 | } |
125 | ||
d62a17ae | 126 | static struct route_map_rule_cmd route_match_interface_cmd = { |
127 | "interface", route_match_interface, route_match_interface_compile, | |
128 | route_match_interface_free}; | |
a94434b6 | 129 | |
130 | /* `match tag TAG' */ | |
131 | /* Match function return 1 if match is success else return zero. */ | |
123214ef MS |
132 | static route_map_result_t route_match_tag(void *rule, |
133 | const struct prefix *prefix, | |
d62a17ae | 134 | route_map_object_t type, void *object) |
718e3744 | 135 | { |
d62a17ae | 136 | route_tag_t *tag; |
137 | struct ripng_info *rinfo; | |
138 | route_tag_t rinfo_tag; | |
139 | ||
140 | if (type == RMAP_RIPNG) { | |
141 | tag = rule; | |
142 | rinfo = object; | |
143 | ||
144 | /* The information stored by rinfo is host ordered. */ | |
145 | rinfo_tag = rinfo->tag; | |
146 | if (rinfo_tag == *tag) | |
147 | return RMAP_MATCH; | |
148 | else | |
149 | return RMAP_NOMATCH; | |
150 | } | |
a94434b6 | 151 | return RMAP_NOMATCH; |
a94434b6 | 152 | } |
153 | ||
d62a17ae | 154 | static struct route_map_rule_cmd route_match_tag_cmd = { |
9d303b37 | 155 | "tag", route_match_tag, route_map_rule_tag_compile, |
d62a17ae | 156 | route_map_rule_tag_free, |
718e3744 | 157 | }; |
6b0655a2 | 158 | |
a94434b6 | 159 | /* `set metric METRIC' */ |
718e3744 | 160 | |
a94434b6 | 161 | /* Set metric to attribute. */ |
123214ef MS |
162 | static route_map_result_t route_set_metric(void *rule, |
163 | const struct prefix *prefix, | |
d62a17ae | 164 | route_map_object_t type, |
165 | void *object) | |
718e3744 | 166 | { |
d62a17ae | 167 | if (type == RMAP_RIPNG) { |
168 | struct rip_metric_modifier *mod; | |
169 | struct ripng_info *rinfo; | |
170 | ||
171 | mod = rule; | |
172 | rinfo = object; | |
173 | ||
6a74c5f9 DS |
174 | if (!mod->used) |
175 | return RMAP_OKAY; | |
176 | ||
d62a17ae | 177 | if (mod->type == metric_increment) |
178 | rinfo->metric_out += mod->metric; | |
179 | else if (mod->type == metric_decrement) | |
180 | rinfo->metric_out -= mod->metric; | |
181 | else if (mod->type == metric_absolute) | |
182 | rinfo->metric_out = mod->metric; | |
183 | ||
184 | if (rinfo->metric_out < 1) | |
185 | rinfo->metric_out = 1; | |
186 | if (rinfo->metric_out > RIPNG_METRIC_INFINITY) | |
187 | rinfo->metric_out = RIPNG_METRIC_INFINITY; | |
188 | ||
189 | rinfo->metric_set = 1; | |
190 | } | |
191 | return RMAP_OKAY; | |
718e3744 | 192 | } |
193 | ||
a94434b6 | 194 | /* set metric compilation. */ |
d62a17ae | 195 | static void *route_set_metric_compile(const char *arg) |
718e3744 | 196 | { |
d62a17ae | 197 | int len; |
198 | const char *pnt; | |
d62a17ae | 199 | long metric; |
200 | char *endptr = NULL; | |
201 | struct rip_metric_modifier *mod; | |
202 | ||
203 | len = strlen(arg); | |
204 | pnt = arg; | |
205 | ||
6a74c5f9 DS |
206 | mod = XMALLOC(MTYPE_ROUTE_MAP_COMPILED, |
207 | sizeof(struct rip_metric_modifier)); | |
208 | mod->used = false; | |
209 | ||
d62a17ae | 210 | if (len == 0) |
6a74c5f9 | 211 | return mod; |
d62a17ae | 212 | |
213 | /* Examine first character. */ | |
214 | if (arg[0] == '+') { | |
6a74c5f9 | 215 | mod->type = metric_increment; |
d62a17ae | 216 | pnt++; |
217 | } else if (arg[0] == '-') { | |
6a74c5f9 | 218 | mod->type = metric_decrement; |
d62a17ae | 219 | pnt++; |
220 | } else | |
6a74c5f9 | 221 | mod->type = metric_absolute; |
d62a17ae | 222 | |
223 | /* Check beginning with digit string. */ | |
224 | if (*pnt < '0' || *pnt > '9') | |
6a74c5f9 | 225 | return mod; |
d62a17ae | 226 | |
227 | /* Convert string to integer. */ | |
228 | metric = strtol(pnt, &endptr, 10); | |
229 | ||
6a74c5f9 DS |
230 | if (*endptr != '\0' || metric < 0) |
231 | return mod; | |
d62a17ae | 232 | |
6a74c5f9 DS |
233 | if (metric > RIPNG_METRIC_INFINITY) { |
234 | zlog_info("%s: Metric specified: %ld is being converted into METRIC_INFINITY", | |
235 | __PRETTY_FUNCTION__, | |
236 | metric); | |
237 | mod->metric = RIPNG_METRIC_INFINITY; | |
238 | } else | |
239 | mod->metric = metric; | |
d62a17ae | 240 | |
6a74c5f9 | 241 | mod->used = true; |
d62a17ae | 242 | return mod; |
718e3744 | 243 | } |
244 | ||
a94434b6 | 245 | /* Free route map's compiled `set metric' value. */ |
d62a17ae | 246 | static void route_set_metric_free(void *rule) |
718e3744 | 247 | { |
d62a17ae | 248 | XFREE(MTYPE_ROUTE_MAP_COMPILED, rule); |
718e3744 | 249 | } |
250 | ||
d62a17ae | 251 | static struct route_map_rule_cmd route_set_metric_cmd = { |
9d303b37 | 252 | "metric", route_set_metric, route_set_metric_compile, |
d62a17ae | 253 | route_set_metric_free, |
718e3744 | 254 | }; |
a94434b6 | 255 | |
256 | /* `set ipv6 next-hop local IP_ADDRESS' */ | |
257 | ||
258 | /* Set nexthop to object. ojbect must be pointer to struct attr. */ | |
d62a17ae | 259 | static route_map_result_t route_set_ipv6_nexthop_local(void *rule, |
123214ef | 260 | const struct prefix *p, |
d62a17ae | 261 | route_map_object_t type, |
262 | void *object) | |
718e3744 | 263 | { |
d62a17ae | 264 | struct in6_addr *address; |
265 | struct ripng_info *rinfo; | |
266 | ||
267 | if (type == RMAP_RIPNG) { | |
268 | /* Fetch routemap's rule information. */ | |
269 | address = rule; | |
270 | rinfo = object; | |
271 | ||
272 | /* Set next hop value. */ | |
273 | rinfo->nexthop_out = *address; | |
274 | } | |
275 | ||
276 | return RMAP_OKAY; | |
718e3744 | 277 | } |
278 | ||
a94434b6 | 279 | /* Route map `ipv6 nexthop local' compile function. Given string is converted |
280 | to struct in6_addr structure. */ | |
d62a17ae | 281 | static void *route_set_ipv6_nexthop_local_compile(const char *arg) |
718e3744 | 282 | { |
d62a17ae | 283 | int ret; |
284 | struct in6_addr *address; | |
718e3744 | 285 | |
d62a17ae | 286 | address = XMALLOC(MTYPE_ROUTE_MAP_COMPILED, sizeof(struct in6_addr)); |
a94434b6 | 287 | |
d62a17ae | 288 | ret = inet_pton(AF_INET6, arg, address); |
a94434b6 | 289 | |
d62a17ae | 290 | if (ret == 0) { |
291 | XFREE(MTYPE_ROUTE_MAP_COMPILED, address); | |
292 | return NULL; | |
293 | } | |
a94434b6 | 294 | |
d62a17ae | 295 | return address; |
718e3744 | 296 | } |
297 | ||
a94434b6 | 298 | /* Free route map's compiled `ipv6 nexthop local' value. */ |
d62a17ae | 299 | static void route_set_ipv6_nexthop_local_free(void *rule) |
718e3744 | 300 | { |
d62a17ae | 301 | XFREE(MTYPE_ROUTE_MAP_COMPILED, rule); |
a94434b6 | 302 | } |
718e3744 | 303 | |
a94434b6 | 304 | /* Route map commands for ipv6 nexthop local set. */ |
d62a17ae | 305 | static struct route_map_rule_cmd route_set_ipv6_nexthop_local_cmd = { |
306 | "ipv6 next-hop local", route_set_ipv6_nexthop_local, | |
307 | route_set_ipv6_nexthop_local_compile, | |
308 | route_set_ipv6_nexthop_local_free}; | |
a94434b6 | 309 | |
310 | /* `set tag TAG' */ | |
311 | ||
312 | /* Set tag to object. ojbect must be pointer to struct attr. */ | |
123214ef MS |
313 | static route_map_result_t route_set_tag(void *rule, |
314 | const struct prefix *prefix, | |
d62a17ae | 315 | route_map_object_t type, void *object) |
a94434b6 | 316 | { |
d62a17ae | 317 | route_tag_t *tag; |
318 | struct ripng_info *rinfo; | |
319 | ||
320 | if (type == RMAP_RIPNG) { | |
321 | /* Fetch routemap's rule information. */ | |
322 | tag = rule; | |
323 | rinfo = object; | |
324 | ||
325 | /* Set next hop value. */ | |
326 | rinfo->tag_out = *tag; | |
327 | } | |
328 | ||
329 | return RMAP_OKAY; | |
718e3744 | 330 | } |
331 | ||
a94434b6 | 332 | /* Route map commands for tag set. */ |
d62a17ae | 333 | static struct route_map_rule_cmd route_set_tag_cmd = { |
334 | "tag", route_set_tag, route_map_rule_tag_compile, | |
335 | route_map_rule_tag_free}; | |
6b0655a2 | 336 | |
a94434b6 | 337 | #define MATCH_STR "Match values from routing table\n" |
338 | #define SET_STR "Set values in destination routing protocol\n" | |
339 | ||
d62a17ae | 340 | void ripng_route_map_reset() |
a94434b6 | 341 | { |
d62a17ae | 342 | /* XXX ??? */ |
343 | ; | |
a94434b6 | 344 | } |
345 | ||
d62a17ae | 346 | void ripng_route_map_init() |
718e3744 | 347 | { |
d62a17ae | 348 | route_map_init(); |
718e3744 | 349 | |
d62a17ae | 350 | route_map_match_interface_hook(generic_match_add); |
351 | route_map_no_match_interface_hook(generic_match_delete); | |
82f97584 | 352 | |
d62a17ae | 353 | route_map_match_metric_hook(generic_match_add); |
354 | route_map_no_match_metric_hook(generic_match_delete); | |
82f97584 | 355 | |
d62a17ae | 356 | route_map_match_tag_hook(generic_match_add); |
357 | route_map_no_match_tag_hook(generic_match_delete); | |
82f97584 | 358 | |
d62a17ae | 359 | route_map_set_ipv6_nexthop_local_hook(generic_set_add); |
360 | route_map_no_set_ipv6_nexthop_local_hook(generic_set_delete); | |
82f97584 | 361 | |
d62a17ae | 362 | route_map_set_metric_hook(generic_set_add); |
363 | route_map_no_set_metric_hook(generic_set_delete); | |
82f97584 | 364 | |
d62a17ae | 365 | route_map_set_tag_hook(generic_set_add); |
366 | route_map_no_set_tag_hook(generic_set_delete); | |
82f97584 | 367 | |
d62a17ae | 368 | route_map_install_match(&route_match_metric_cmd); |
369 | route_map_install_match(&route_match_interface_cmd); | |
370 | route_map_install_match(&route_match_tag_cmd); | |
371 | route_map_install_set(&route_set_metric_cmd); | |
372 | route_map_install_set(&route_set_ipv6_nexthop_local_cmd); | |
373 | route_map_install_set(&route_set_tag_cmd); | |
718e3744 | 374 | } |