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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. */ | |
2789041a LK |
41 | static route_map_result_t route_match_metric(void *rule, |
42 | const struct prefix *prefix, | |
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. */ |
2789041a LK |
89 | static route_map_result_t route_match_interface(void *rule, |
90 | const struct prefix *prefix, | |
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; | |
f11e98ec PG |
100 | ifp = if_lookup_by_name(ifname, |
101 | vrf_lookup_by_id(VRF_DEFAULT)); | |
718e3744 | 102 | |
d62a17ae | 103 | if (!ifp) |
104 | return RMAP_NOMATCH; | |
718e3744 | 105 | |
d62a17ae | 106 | rinfo = object; |
718e3744 | 107 | |
d62a17ae | 108 | if (rinfo->ifindex == ifp->ifindex) |
109 | return RMAP_MATCH; | |
110 | else | |
111 | return RMAP_NOMATCH; | |
112 | } | |
a94434b6 | 113 | return RMAP_NOMATCH; |
718e3744 | 114 | } |
115 | ||
a94434b6 | 116 | /* Route map `match interface' match statement. `arg' is IFNAME value */ |
d62a17ae | 117 | static void *route_match_interface_compile(const char *arg) |
718e3744 | 118 | { |
d62a17ae | 119 | return XSTRDUP(MTYPE_ROUTE_MAP_COMPILED, arg); |
718e3744 | 120 | } |
121 | ||
d62a17ae | 122 | static void route_match_interface_free(void *rule) |
718e3744 | 123 | { |
d62a17ae | 124 | XFREE(MTYPE_ROUTE_MAP_COMPILED, rule); |
718e3744 | 125 | } |
126 | ||
d62a17ae | 127 | static struct route_map_rule_cmd route_match_interface_cmd = { |
128 | "interface", route_match_interface, route_match_interface_compile, | |
129 | route_match_interface_free}; | |
a94434b6 | 130 | |
131 | /* `match tag TAG' */ | |
132 | /* Match function return 1 if match is success else return zero. */ | |
2789041a LK |
133 | static route_map_result_t route_match_tag(void *rule, |
134 | const struct prefix *prefix, | |
135 | route_map_object_t type, void *object) | |
718e3744 | 136 | { |
d62a17ae | 137 | route_tag_t *tag; |
138 | struct ripng_info *rinfo; | |
139 | route_tag_t rinfo_tag; | |
140 | ||
141 | if (type == RMAP_RIPNG) { | |
142 | tag = rule; | |
143 | rinfo = object; | |
144 | ||
145 | /* The information stored by rinfo is host ordered. */ | |
146 | rinfo_tag = rinfo->tag; | |
147 | if (rinfo_tag == *tag) | |
148 | return RMAP_MATCH; | |
149 | else | |
150 | return RMAP_NOMATCH; | |
151 | } | |
a94434b6 | 152 | return RMAP_NOMATCH; |
a94434b6 | 153 | } |
154 | ||
d62a17ae | 155 | static struct route_map_rule_cmd route_match_tag_cmd = { |
9d303b37 | 156 | "tag", route_match_tag, route_map_rule_tag_compile, |
d62a17ae | 157 | route_map_rule_tag_free, |
718e3744 | 158 | }; |
6b0655a2 | 159 | |
a94434b6 | 160 | /* `set metric METRIC' */ |
718e3744 | 161 | |
a94434b6 | 162 | /* Set metric to attribute. */ |
2789041a LK |
163 | static route_map_result_t route_set_metric(void *rule, |
164 | const struct prefix *prefix, | |
165 | route_map_object_t type, | |
166 | void *object) | |
718e3744 | 167 | { |
d62a17ae | 168 | if (type == RMAP_RIPNG) { |
169 | struct rip_metric_modifier *mod; | |
170 | struct ripng_info *rinfo; | |
171 | ||
172 | mod = rule; | |
173 | rinfo = object; | |
174 | ||
6a74c5f9 DS |
175 | if (!mod->used) |
176 | return RMAP_OKAY; | |
177 | ||
d62a17ae | 178 | if (mod->type == metric_increment) |
179 | rinfo->metric_out += mod->metric; | |
180 | else if (mod->type == metric_decrement) | |
181 | rinfo->metric_out -= mod->metric; | |
182 | else if (mod->type == metric_absolute) | |
183 | rinfo->metric_out = mod->metric; | |
184 | ||
185 | if (rinfo->metric_out < 1) | |
186 | rinfo->metric_out = 1; | |
187 | if (rinfo->metric_out > RIPNG_METRIC_INFINITY) | |
188 | rinfo->metric_out = RIPNG_METRIC_INFINITY; | |
189 | ||
190 | rinfo->metric_set = 1; | |
191 | } | |
192 | return RMAP_OKAY; | |
718e3744 | 193 | } |
194 | ||
a94434b6 | 195 | /* set metric compilation. */ |
d62a17ae | 196 | static void *route_set_metric_compile(const char *arg) |
718e3744 | 197 | { |
d62a17ae | 198 | int len; |
199 | const char *pnt; | |
d62a17ae | 200 | long metric; |
201 | char *endptr = NULL; | |
202 | struct rip_metric_modifier *mod; | |
203 | ||
204 | len = strlen(arg); | |
205 | pnt = arg; | |
206 | ||
6a74c5f9 DS |
207 | mod = XMALLOC(MTYPE_ROUTE_MAP_COMPILED, |
208 | sizeof(struct rip_metric_modifier)); | |
209 | mod->used = false; | |
210 | ||
d62a17ae | 211 | if (len == 0) |
6a74c5f9 | 212 | return mod; |
d62a17ae | 213 | |
214 | /* Examine first character. */ | |
215 | if (arg[0] == '+') { | |
6a74c5f9 | 216 | mod->type = metric_increment; |
d62a17ae | 217 | pnt++; |
218 | } else if (arg[0] == '-') { | |
6a74c5f9 | 219 | mod->type = metric_decrement; |
d62a17ae | 220 | pnt++; |
221 | } else | |
6a74c5f9 | 222 | mod->type = metric_absolute; |
d62a17ae | 223 | |
224 | /* Check beginning with digit string. */ | |
225 | if (*pnt < '0' || *pnt > '9') | |
6a74c5f9 | 226 | return mod; |
d62a17ae | 227 | |
228 | /* Convert string to integer. */ | |
229 | metric = strtol(pnt, &endptr, 10); | |
230 | ||
6a74c5f9 DS |
231 | if (*endptr != '\0' || metric < 0) |
232 | return mod; | |
d62a17ae | 233 | |
6a74c5f9 DS |
234 | if (metric > RIPNG_METRIC_INFINITY) { |
235 | zlog_info("%s: Metric specified: %ld is being converted into METRIC_INFINITY", | |
236 | __PRETTY_FUNCTION__, | |
237 | metric); | |
238 | mod->metric = RIPNG_METRIC_INFINITY; | |
239 | } else | |
240 | mod->metric = metric; | |
d62a17ae | 241 | |
6a74c5f9 | 242 | mod->used = true; |
d62a17ae | 243 | return mod; |
718e3744 | 244 | } |
245 | ||
a94434b6 | 246 | /* Free route map's compiled `set metric' value. */ |
d62a17ae | 247 | static void route_set_metric_free(void *rule) |
718e3744 | 248 | { |
d62a17ae | 249 | XFREE(MTYPE_ROUTE_MAP_COMPILED, rule); |
718e3744 | 250 | } |
251 | ||
d62a17ae | 252 | static struct route_map_rule_cmd route_set_metric_cmd = { |
9d303b37 | 253 | "metric", route_set_metric, route_set_metric_compile, |
d62a17ae | 254 | route_set_metric_free, |
718e3744 | 255 | }; |
a94434b6 | 256 | |
257 | /* `set ipv6 next-hop local IP_ADDRESS' */ | |
258 | ||
259 | /* Set nexthop to object. ojbect must be pointer to struct attr. */ | |
2789041a LK |
260 | static route_map_result_t route_set_ipv6_nexthop_local(void *rule, |
261 | const struct prefix *p, | |
262 | route_map_object_t type, | |
263 | void *object) | |
718e3744 | 264 | { |
d62a17ae | 265 | struct in6_addr *address; |
266 | struct ripng_info *rinfo; | |
267 | ||
268 | if (type == RMAP_RIPNG) { | |
269 | /* Fetch routemap's rule information. */ | |
270 | address = rule; | |
271 | rinfo = object; | |
272 | ||
273 | /* Set next hop value. */ | |
274 | rinfo->nexthop_out = *address; | |
275 | } | |
276 | ||
277 | return RMAP_OKAY; | |
718e3744 | 278 | } |
279 | ||
a94434b6 | 280 | /* Route map `ipv6 nexthop local' compile function. Given string is converted |
281 | to struct in6_addr structure. */ | |
d62a17ae | 282 | static void *route_set_ipv6_nexthop_local_compile(const char *arg) |
718e3744 | 283 | { |
d62a17ae | 284 | int ret; |
285 | struct in6_addr *address; | |
718e3744 | 286 | |
d62a17ae | 287 | address = XMALLOC(MTYPE_ROUTE_MAP_COMPILED, sizeof(struct in6_addr)); |
a94434b6 | 288 | |
d62a17ae | 289 | ret = inet_pton(AF_INET6, arg, address); |
a94434b6 | 290 | |
d62a17ae | 291 | if (ret == 0) { |
292 | XFREE(MTYPE_ROUTE_MAP_COMPILED, address); | |
293 | return NULL; | |
294 | } | |
a94434b6 | 295 | |
d62a17ae | 296 | return address; |
718e3744 | 297 | } |
298 | ||
a94434b6 | 299 | /* Free route map's compiled `ipv6 nexthop local' value. */ |
d62a17ae | 300 | static void route_set_ipv6_nexthop_local_free(void *rule) |
718e3744 | 301 | { |
d62a17ae | 302 | XFREE(MTYPE_ROUTE_MAP_COMPILED, rule); |
a94434b6 | 303 | } |
718e3744 | 304 | |
a94434b6 | 305 | /* Route map commands for ipv6 nexthop local set. */ |
d62a17ae | 306 | static struct route_map_rule_cmd route_set_ipv6_nexthop_local_cmd = { |
307 | "ipv6 next-hop local", route_set_ipv6_nexthop_local, | |
308 | route_set_ipv6_nexthop_local_compile, | |
309 | route_set_ipv6_nexthop_local_free}; | |
a94434b6 | 310 | |
311 | /* `set tag TAG' */ | |
312 | ||
313 | /* Set tag to object. ojbect must be pointer to struct attr. */ | |
2789041a LK |
314 | static route_map_result_t route_set_tag(void *rule, |
315 | const struct prefix *prefix, | |
316 | route_map_object_t type, void *object) | |
a94434b6 | 317 | { |
d62a17ae | 318 | route_tag_t *tag; |
319 | struct ripng_info *rinfo; | |
320 | ||
321 | if (type == RMAP_RIPNG) { | |
322 | /* Fetch routemap's rule information. */ | |
323 | tag = rule; | |
324 | rinfo = object; | |
325 | ||
326 | /* Set next hop value. */ | |
327 | rinfo->tag_out = *tag; | |
328 | } | |
329 | ||
330 | return RMAP_OKAY; | |
718e3744 | 331 | } |
332 | ||
a94434b6 | 333 | /* Route map commands for tag set. */ |
d62a17ae | 334 | static struct route_map_rule_cmd route_set_tag_cmd = { |
335 | "tag", route_set_tag, route_map_rule_tag_compile, | |
336 | route_map_rule_tag_free}; | |
6b0655a2 | 337 | |
a94434b6 | 338 | #define MATCH_STR "Match values from routing table\n" |
339 | #define SET_STR "Set values in destination routing protocol\n" | |
340 | ||
4d762f26 | 341 | void ripng_route_map_init(void) |
718e3744 | 342 | { |
d62a17ae | 343 | route_map_init(); |
718e3744 | 344 | |
d62a17ae | 345 | route_map_match_interface_hook(generic_match_add); |
346 | route_map_no_match_interface_hook(generic_match_delete); | |
82f97584 | 347 | |
d62a17ae | 348 | route_map_match_metric_hook(generic_match_add); |
349 | route_map_no_match_metric_hook(generic_match_delete); | |
82f97584 | 350 | |
d62a17ae | 351 | route_map_match_tag_hook(generic_match_add); |
352 | route_map_no_match_tag_hook(generic_match_delete); | |
82f97584 | 353 | |
d62a17ae | 354 | route_map_set_ipv6_nexthop_local_hook(generic_set_add); |
355 | route_map_no_set_ipv6_nexthop_local_hook(generic_set_delete); | |
82f97584 | 356 | |
d62a17ae | 357 | route_map_set_metric_hook(generic_set_add); |
358 | route_map_no_set_metric_hook(generic_set_delete); | |
82f97584 | 359 | |
d62a17ae | 360 | route_map_set_tag_hook(generic_set_add); |
361 | route_map_no_set_tag_hook(generic_set_delete); | |
82f97584 | 362 | |
d62a17ae | 363 | route_map_install_match(&route_match_metric_cmd); |
364 | route_map_install_match(&route_match_interface_cmd); | |
365 | route_map_install_match(&route_match_tag_cmd); | |
366 | route_map_install_set(&route_set_metric_cmd); | |
367 | route_map_install_set(&route_set_ipv6_nexthop_local_cmd); | |
368 | route_map_install_set(&route_set_tag_cmd); | |
718e3744 | 369 | } |