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1 | // SPDX-License-Identifier: GPL-2.0-or-later | |
2 | /* route-map for interface. | |
3 | * Copyright (C) 1999 Kunihiro Ishiguro | |
4 | */ | |
5 | ||
6 | #include <zebra.h> | |
7 | ||
8 | #include "hash.h" | |
9 | #include "command.h" | |
10 | #include "memory.h" | |
11 | #include "if.h" | |
12 | #include "if_rmap.h" | |
13 | ||
14 | DEFINE_MTYPE_STATIC(LIB, IF_RMAP_CTX, "Interface route map container"); | |
15 | DEFINE_MTYPE_STATIC(LIB, IF_RMAP_CTX_NAME, | |
16 | "Interface route map container name"); | |
17 | DEFINE_MTYPE_STATIC(LIB, IF_RMAP, "Interface route map"); | |
18 | DEFINE_MTYPE_STATIC(LIB, IF_RMAP_NAME, "I.f. route map name"); | |
19 | ||
20 | static struct list *if_rmap_ctx_list; | |
21 | ||
22 | static struct if_rmap *if_rmap_new(void) | |
23 | { | |
24 | struct if_rmap *new; | |
25 | ||
26 | new = XCALLOC(MTYPE_IF_RMAP, sizeof(struct if_rmap)); | |
27 | ||
28 | return new; | |
29 | } | |
30 | ||
31 | static void if_rmap_free(struct if_rmap *if_rmap) | |
32 | { | |
33 | XFREE(MTYPE_IF_RMAP_NAME, if_rmap->ifname); | |
34 | ||
35 | XFREE(MTYPE_IF_RMAP_NAME, if_rmap->routemap[IF_RMAP_IN]); | |
36 | XFREE(MTYPE_IF_RMAP_NAME, if_rmap->routemap[IF_RMAP_OUT]); | |
37 | ||
38 | XFREE(MTYPE_IF_RMAP, if_rmap); | |
39 | } | |
40 | ||
41 | struct if_rmap *if_rmap_lookup(struct if_rmap_ctx *ctx, const char *ifname) | |
42 | { | |
43 | struct if_rmap key; | |
44 | struct if_rmap *if_rmap; | |
45 | ||
46 | /* temporary copy */ | |
47 | key.ifname = (ifname) ? XSTRDUP(MTYPE_IF_RMAP_NAME, ifname) : NULL; | |
48 | ||
49 | if_rmap = hash_lookup(ctx->ifrmaphash, &key); | |
50 | ||
51 | XFREE(MTYPE_IF_RMAP_NAME, key.ifname); | |
52 | ||
53 | return if_rmap; | |
54 | } | |
55 | ||
56 | void if_rmap_hook_add(struct if_rmap_ctx *ctx, | |
57 | void (*func)(struct if_rmap_ctx *ctx, | |
58 | struct if_rmap *)) | |
59 | { | |
60 | ctx->if_rmap_add_hook = func; | |
61 | } | |
62 | ||
63 | void if_rmap_hook_delete(struct if_rmap_ctx *ctx, | |
64 | void (*func)(struct if_rmap_ctx *ctx, | |
65 | struct if_rmap *)) | |
66 | { | |
67 | ctx->if_rmap_delete_hook = func; | |
68 | } | |
69 | ||
70 | static void *if_rmap_hash_alloc(void *arg) | |
71 | { | |
72 | struct if_rmap *ifarg = (struct if_rmap *)arg; | |
73 | struct if_rmap *if_rmap; | |
74 | ||
75 | if_rmap = if_rmap_new(); | |
76 | if_rmap->ifname = XSTRDUP(MTYPE_IF_RMAP_NAME, ifarg->ifname); | |
77 | ||
78 | return if_rmap; | |
79 | } | |
80 | ||
81 | static struct if_rmap *if_rmap_get(struct if_rmap_ctx *ctx, const char *ifname) | |
82 | { | |
83 | struct if_rmap key; | |
84 | struct if_rmap *ret; | |
85 | ||
86 | /* temporary copy */ | |
87 | key.ifname = (ifname) ? XSTRDUP(MTYPE_IF_RMAP_NAME, ifname) : NULL; | |
88 | ||
89 | ret = hash_get(ctx->ifrmaphash, &key, if_rmap_hash_alloc); | |
90 | ||
91 | XFREE(MTYPE_IF_RMAP_NAME, key.ifname); | |
92 | ||
93 | return ret; | |
94 | } | |
95 | ||
96 | static unsigned int if_rmap_hash_make(const void *data) | |
97 | { | |
98 | const struct if_rmap *if_rmap = data; | |
99 | ||
100 | return string_hash_make(if_rmap->ifname); | |
101 | } | |
102 | ||
103 | static bool if_rmap_hash_cmp(const void *arg1, const void *arg2) | |
104 | { | |
105 | const struct if_rmap *if_rmap1 = arg1; | |
106 | const struct if_rmap *if_rmap2 = arg2; | |
107 | ||
108 | return strcmp(if_rmap1->ifname, if_rmap2->ifname) == 0; | |
109 | } | |
110 | ||
111 | static struct if_rmap *if_rmap_set(struct if_rmap_ctx *ctx, | |
112 | const char *ifname, enum if_rmap_type type, | |
113 | const char *routemap_name) | |
114 | { | |
115 | struct if_rmap *if_rmap; | |
116 | ||
117 | if_rmap = if_rmap_get(ctx, ifname); | |
118 | ||
119 | if (type == IF_RMAP_IN) { | |
120 | XFREE(MTYPE_IF_RMAP_NAME, if_rmap->routemap[IF_RMAP_IN]); | |
121 | if_rmap->routemap[IF_RMAP_IN] = | |
122 | XSTRDUP(MTYPE_IF_RMAP_NAME, routemap_name); | |
123 | } | |
124 | if (type == IF_RMAP_OUT) { | |
125 | XFREE(MTYPE_IF_RMAP_NAME, if_rmap->routemap[IF_RMAP_OUT]); | |
126 | if_rmap->routemap[IF_RMAP_OUT] = | |
127 | XSTRDUP(MTYPE_IF_RMAP_NAME, routemap_name); | |
128 | } | |
129 | ||
130 | if (ctx->if_rmap_add_hook) | |
131 | (ctx->if_rmap_add_hook)(ctx, if_rmap); | |
132 | ||
133 | return if_rmap; | |
134 | } | |
135 | ||
136 | static int if_rmap_unset(struct if_rmap_ctx *ctx, | |
137 | const char *ifname, enum if_rmap_type type, | |
138 | const char *routemap_name) | |
139 | { | |
140 | struct if_rmap *if_rmap; | |
141 | ||
142 | if_rmap = if_rmap_lookup(ctx, ifname); | |
143 | if (!if_rmap) | |
144 | return 0; | |
145 | ||
146 | if (type == IF_RMAP_IN) { | |
147 | if (!if_rmap->routemap[IF_RMAP_IN]) | |
148 | return 0; | |
149 | if (strcmp(if_rmap->routemap[IF_RMAP_IN], routemap_name) != 0) | |
150 | return 0; | |
151 | ||
152 | XFREE(MTYPE_IF_RMAP_NAME, if_rmap->routemap[IF_RMAP_IN]); | |
153 | } | |
154 | ||
155 | if (type == IF_RMAP_OUT) { | |
156 | if (!if_rmap->routemap[IF_RMAP_OUT]) | |
157 | return 0; | |
158 | if (strcmp(if_rmap->routemap[IF_RMAP_OUT], routemap_name) != 0) | |
159 | return 0; | |
160 | ||
161 | XFREE(MTYPE_IF_RMAP_NAME, if_rmap->routemap[IF_RMAP_OUT]); | |
162 | } | |
163 | ||
164 | if (ctx->if_rmap_delete_hook) | |
165 | ctx->if_rmap_delete_hook(ctx, if_rmap); | |
166 | ||
167 | if (if_rmap->routemap[IF_RMAP_IN] == NULL | |
168 | && if_rmap->routemap[IF_RMAP_OUT] == NULL) { | |
169 | hash_release(ctx->ifrmaphash, if_rmap); | |
170 | if_rmap_free(if_rmap); | |
171 | } | |
172 | ||
173 | return 1; | |
174 | } | |
175 | ||
176 | DEFUN (if_rmap, | |
177 | if_rmap_cmd, | |
178 | "route-map RMAP_NAME <in|out> IFNAME", | |
179 | "Route map set\n" | |
180 | "Route map name\n" | |
181 | "Route map set for input filtering\n" | |
182 | "Route map set for output filtering\n" | |
183 | "Route map interface name\n") | |
184 | { | |
185 | int idx_rmap_name = 1; | |
186 | int idx_in_out = 2; | |
187 | int idx_ifname = 3; | |
188 | enum if_rmap_type type; | |
189 | struct if_rmap_ctx *ctx = | |
190 | (struct if_rmap_ctx *)listnode_head(if_rmap_ctx_list); | |
191 | ||
192 | if (strncmp(argv[idx_in_out]->text, "in", 1) == 0) | |
193 | type = IF_RMAP_IN; | |
194 | else if (strncmp(argv[idx_in_out]->text, "out", 1) == 0) | |
195 | type = IF_RMAP_OUT; | |
196 | else { | |
197 | vty_out(vty, "route-map direction must be [in|out]\n"); | |
198 | return CMD_WARNING_CONFIG_FAILED; | |
199 | } | |
200 | ||
201 | if_rmap_set(ctx, argv[idx_ifname]->arg, | |
202 | type, argv[idx_rmap_name]->arg); | |
203 | ||
204 | return CMD_SUCCESS; | |
205 | } | |
206 | ||
207 | DEFUN (no_if_rmap, | |
208 | no_if_rmap_cmd, | |
209 | "no route-map ROUTEMAP_NAME <in|out> IFNAME", | |
210 | NO_STR | |
211 | "Route map unset\n" | |
212 | "Route map name\n" | |
213 | "Route map for input filtering\n" | |
214 | "Route map for output filtering\n" | |
215 | "Route map interface name\n") | |
216 | { | |
217 | int idx_routemap_name = 2; | |
218 | int idx_in_out = 3; | |
219 | int idx_ifname = 4; | |
220 | int ret; | |
221 | enum if_rmap_type type; | |
222 | struct if_rmap_ctx *ctx = | |
223 | (struct if_rmap_ctx *)listnode_head(if_rmap_ctx_list); | |
224 | ||
225 | if (strncmp(argv[idx_in_out]->arg, "i", 1) == 0) | |
226 | type = IF_RMAP_IN; | |
227 | else if (strncmp(argv[idx_in_out]->arg, "o", 1) == 0) | |
228 | type = IF_RMAP_OUT; | |
229 | else { | |
230 | vty_out(vty, "route-map direction must be [in|out]\n"); | |
231 | return CMD_WARNING_CONFIG_FAILED; | |
232 | } | |
233 | ||
234 | ret = if_rmap_unset(ctx, argv[idx_ifname]->arg, type, | |
235 | argv[idx_routemap_name]->arg); | |
236 | if (!ret) { | |
237 | vty_out(vty, "route-map doesn't exist\n"); | |
238 | return CMD_WARNING_CONFIG_FAILED; | |
239 | } | |
240 | return CMD_SUCCESS; | |
241 | } | |
242 | ||
243 | ||
244 | /* Configuration write function. */ | |
245 | int config_write_if_rmap(struct vty *vty, | |
246 | struct if_rmap_ctx *ctx) | |
247 | { | |
248 | unsigned int i; | |
249 | struct hash_bucket *mp; | |
250 | int write = 0; | |
251 | struct hash *ifrmaphash = ctx->ifrmaphash; | |
252 | ||
253 | for (i = 0; i < ifrmaphash->size; i++) | |
254 | for (mp = ifrmaphash->index[i]; mp; mp = mp->next) { | |
255 | struct if_rmap *if_rmap; | |
256 | ||
257 | if_rmap = mp->data; | |
258 | ||
259 | if (if_rmap->routemap[IF_RMAP_IN]) { | |
260 | vty_out(vty, " route-map %s in %s\n", | |
261 | if_rmap->routemap[IF_RMAP_IN], | |
262 | if_rmap->ifname); | |
263 | write++; | |
264 | } | |
265 | ||
266 | if (if_rmap->routemap[IF_RMAP_OUT]) { | |
267 | vty_out(vty, " route-map %s out %s\n", | |
268 | if_rmap->routemap[IF_RMAP_OUT], | |
269 | if_rmap->ifname); | |
270 | write++; | |
271 | } | |
272 | } | |
273 | return write; | |
274 | } | |
275 | ||
276 | void if_rmap_ctx_delete(struct if_rmap_ctx *ctx) | |
277 | { | |
278 | listnode_delete(if_rmap_ctx_list, ctx); | |
279 | hash_clean(ctx->ifrmaphash, (void (*)(void *))if_rmap_free); | |
280 | if (ctx->name) | |
281 | XFREE(MTYPE_IF_RMAP_CTX_NAME, ctx); | |
282 | XFREE(MTYPE_IF_RMAP_CTX, ctx); | |
283 | } | |
284 | ||
285 | /* name is optional: either vrf name, or other */ | |
286 | struct if_rmap_ctx *if_rmap_ctx_create(const char *name) | |
287 | { | |
288 | struct if_rmap_ctx *ctx; | |
289 | ||
290 | ctx = XCALLOC(MTYPE_IF_RMAP_CTX, sizeof(struct if_rmap_ctx)); | |
291 | ||
292 | if (ctx->name) | |
293 | ctx->name = XSTRDUP(MTYPE_IF_RMAP_CTX_NAME, name); | |
294 | ctx->ifrmaphash = hash_create_size(4, if_rmap_hash_make, if_rmap_hash_cmp, | |
295 | "Interface Route-Map Hash"); | |
296 | if (!if_rmap_ctx_list) | |
297 | if_rmap_ctx_list = list_new(); | |
298 | listnode_add(if_rmap_ctx_list, ctx); | |
299 | return ctx; | |
300 | } | |
301 | ||
302 | void if_rmap_init(int node) | |
303 | { | |
304 | if (node == RIPNG_NODE) { | |
305 | } else if (node == RIP_NODE) { | |
306 | install_element(RIP_NODE, &if_rmap_cmd); | |
307 | install_element(RIP_NODE, &no_if_rmap_cmd); | |
308 | } | |
309 | if_rmap_ctx_list = list_new(); | |
310 | } | |
311 | ||
312 | void if_rmap_terminate(void) | |
313 | { | |
314 | if (!if_rmap_ctx_list) | |
315 | return; | |
316 | list_delete(&if_rmap_ctx_list); | |
317 | } |