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1 | /* RIP offset-list | |
2 | * Copyright (C) 2000 Kunihiro Ishiguro <kunihiro@zebra.org> | |
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 | * | |
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 "if.h" | |
24 | #include "prefix.h" | |
25 | #include "filter.h" | |
26 | #include "command.h" | |
27 | #include "linklist.h" | |
28 | #include "memory.h" | |
29 | ||
30 | #include "ripd/ripd.h" | |
31 | ||
32 | #define RIP_OFFSET_LIST_IN 0 | |
33 | #define RIP_OFFSET_LIST_OUT 1 | |
34 | #define RIP_OFFSET_LIST_MAX 2 | |
35 | ||
36 | struct rip_offset_list { | |
37 | char *ifname; | |
38 | ||
39 | struct { | |
40 | char *alist_name; | |
41 | /* struct access_list *alist; */ | |
42 | int metric; | |
43 | } direct[RIP_OFFSET_LIST_MAX]; | |
44 | }; | |
45 | ||
46 | static struct list *rip_offset_list_master; | |
47 | ||
48 | static int strcmp_safe(const char *s1, const char *s2) | |
49 | { | |
50 | if (s1 == NULL && s2 == NULL) | |
51 | return 0; | |
52 | if (s1 == NULL) | |
53 | return -1; | |
54 | if (s2 == NULL) | |
55 | return 1; | |
56 | return strcmp(s1, s2); | |
57 | } | |
58 | ||
59 | static struct rip_offset_list *rip_offset_list_new(void) | |
60 | { | |
61 | return XCALLOC(MTYPE_RIP_OFFSET_LIST, sizeof(struct rip_offset_list)); | |
62 | } | |
63 | ||
64 | static void rip_offset_list_free(struct rip_offset_list *offset) | |
65 | { | |
66 | XFREE(MTYPE_RIP_OFFSET_LIST, offset); | |
67 | } | |
68 | ||
69 | static struct rip_offset_list *rip_offset_list_lookup(const char *ifname) | |
70 | { | |
71 | struct rip_offset_list *offset; | |
72 | struct listnode *node, *nnode; | |
73 | ||
74 | for (ALL_LIST_ELEMENTS(rip_offset_list_master, node, nnode, offset)) { | |
75 | if (strcmp_safe(offset->ifname, ifname) == 0) | |
76 | return offset; | |
77 | } | |
78 | return NULL; | |
79 | } | |
80 | ||
81 | static struct rip_offset_list *rip_offset_list_get(const char *ifname) | |
82 | { | |
83 | struct rip_offset_list *offset; | |
84 | ||
85 | offset = rip_offset_list_lookup(ifname); | |
86 | if (offset) | |
87 | return offset; | |
88 | ||
89 | offset = rip_offset_list_new(); | |
90 | if (ifname) | |
91 | offset->ifname = strdup(ifname); | |
92 | listnode_add_sort(rip_offset_list_master, offset); | |
93 | ||
94 | return offset; | |
95 | } | |
96 | ||
97 | static int rip_offset_list_set(struct vty *vty, const char *alist, | |
98 | const char *direct_str, const char *metric_str, | |
99 | const char *ifname) | |
100 | { | |
101 | int direct; | |
102 | int metric; | |
103 | struct rip_offset_list *offset; | |
104 | ||
105 | /* Check direction. */ | |
106 | if (strncmp(direct_str, "i", 1) == 0) | |
107 | direct = RIP_OFFSET_LIST_IN; | |
108 | else if (strncmp(direct_str, "o", 1) == 0) | |
109 | direct = RIP_OFFSET_LIST_OUT; | |
110 | else { | |
111 | vty_out(vty, "Invalid direction: %s\n", direct_str); | |
112 | return CMD_WARNING_CONFIG_FAILED; | |
113 | } | |
114 | ||
115 | /* Check metric. */ | |
116 | metric = atoi(metric_str); | |
117 | if (metric < 0 || metric > 16) { | |
118 | vty_out(vty, "Invalid metric: %s\n", metric_str); | |
119 | return CMD_WARNING_CONFIG_FAILED; | |
120 | } | |
121 | ||
122 | /* Get offset-list structure with interface name. */ | |
123 | offset = rip_offset_list_get(ifname); | |
124 | ||
125 | if (offset->direct[direct].alist_name) | |
126 | free(offset->direct[direct].alist_name); | |
127 | offset->direct[direct].alist_name = strdup(alist); | |
128 | offset->direct[direct].metric = metric; | |
129 | ||
130 | return CMD_SUCCESS; | |
131 | } | |
132 | ||
133 | static int rip_offset_list_unset(struct vty *vty, const char *alist, | |
134 | const char *direct_str, const char *metric_str, | |
135 | const char *ifname) | |
136 | { | |
137 | int direct; | |
138 | int metric; | |
139 | struct rip_offset_list *offset; | |
140 | ||
141 | /* Check direction. */ | |
142 | if (strncmp(direct_str, "i", 1) == 0) | |
143 | direct = RIP_OFFSET_LIST_IN; | |
144 | else if (strncmp(direct_str, "o", 1) == 0) | |
145 | direct = RIP_OFFSET_LIST_OUT; | |
146 | else { | |
147 | vty_out(vty, "Invalid direction: %s\n", direct_str); | |
148 | return CMD_WARNING_CONFIG_FAILED; | |
149 | } | |
150 | ||
151 | /* Check metric. */ | |
152 | metric = atoi(metric_str); | |
153 | if (metric < 0 || metric > 16) { | |
154 | vty_out(vty, "Invalid metric: %s\n", metric_str); | |
155 | return CMD_WARNING_CONFIG_FAILED; | |
156 | } | |
157 | ||
158 | /* Get offset-list structure with interface name. */ | |
159 | offset = rip_offset_list_lookup(ifname); | |
160 | ||
161 | if (offset) { | |
162 | if (offset->direct[direct].alist_name) | |
163 | free(offset->direct[direct].alist_name); | |
164 | offset->direct[direct].alist_name = NULL; | |
165 | ||
166 | if (offset->direct[RIP_OFFSET_LIST_IN].alist_name == NULL | |
167 | && offset->direct[RIP_OFFSET_LIST_OUT].alist_name == NULL) { | |
168 | listnode_delete(rip_offset_list_master, offset); | |
169 | if (offset->ifname) | |
170 | free(offset->ifname); | |
171 | rip_offset_list_free(offset); | |
172 | } | |
173 | } else { | |
174 | vty_out(vty, "Can't find offset-list\n"); | |
175 | return CMD_WARNING_CONFIG_FAILED; | |
176 | } | |
177 | return CMD_SUCCESS; | |
178 | } | |
179 | ||
180 | #define OFFSET_LIST_IN_NAME(O) ((O)->direct[RIP_OFFSET_LIST_IN].alist_name) | |
181 | #define OFFSET_LIST_IN_METRIC(O) ((O)->direct[RIP_OFFSET_LIST_IN].metric) | |
182 | ||
183 | #define OFFSET_LIST_OUT_NAME(O) ((O)->direct[RIP_OFFSET_LIST_OUT].alist_name) | |
184 | #define OFFSET_LIST_OUT_METRIC(O) ((O)->direct[RIP_OFFSET_LIST_OUT].metric) | |
185 | ||
186 | /* If metric is modifed return 1. */ | |
187 | int rip_offset_list_apply_in(struct prefix_ipv4 *p, struct interface *ifp, | |
188 | uint32_t *metric) | |
189 | { | |
190 | struct rip_offset_list *offset; | |
191 | struct access_list *alist; | |
192 | ||
193 | /* Look up offset-list with interface name. */ | |
194 | offset = rip_offset_list_lookup(ifp->name); | |
195 | if (offset && OFFSET_LIST_IN_NAME(offset)) { | |
196 | alist = access_list_lookup(AFI_IP, OFFSET_LIST_IN_NAME(offset)); | |
197 | ||
198 | if (alist | |
199 | && access_list_apply(alist, (struct prefix *)p) | |
200 | == FILTER_PERMIT) { | |
201 | *metric += OFFSET_LIST_IN_METRIC(offset); | |
202 | return 1; | |
203 | } | |
204 | return 0; | |
205 | } | |
206 | /* Look up offset-list without interface name. */ | |
207 | offset = rip_offset_list_lookup(NULL); | |
208 | if (offset && OFFSET_LIST_IN_NAME(offset)) { | |
209 | alist = access_list_lookup(AFI_IP, OFFSET_LIST_IN_NAME(offset)); | |
210 | ||
211 | if (alist | |
212 | && access_list_apply(alist, (struct prefix *)p) | |
213 | == FILTER_PERMIT) { | |
214 | *metric += OFFSET_LIST_IN_METRIC(offset); | |
215 | return 1; | |
216 | } | |
217 | return 0; | |
218 | } | |
219 | return 0; | |
220 | } | |
221 | ||
222 | /* If metric is modifed return 1. */ | |
223 | int rip_offset_list_apply_out(struct prefix_ipv4 *p, struct interface *ifp, | |
224 | uint32_t *metric) | |
225 | { | |
226 | struct rip_offset_list *offset; | |
227 | struct access_list *alist; | |
228 | ||
229 | /* Look up offset-list with interface name. */ | |
230 | offset = rip_offset_list_lookup(ifp->name); | |
231 | if (offset && OFFSET_LIST_OUT_NAME(offset)) { | |
232 | alist = access_list_lookup(AFI_IP, | |
233 | OFFSET_LIST_OUT_NAME(offset)); | |
234 | ||
235 | if (alist | |
236 | && access_list_apply(alist, (struct prefix *)p) | |
237 | == FILTER_PERMIT) { | |
238 | *metric += OFFSET_LIST_OUT_METRIC(offset); | |
239 | return 1; | |
240 | } | |
241 | return 0; | |
242 | } | |
243 | ||
244 | /* Look up offset-list without interface name. */ | |
245 | offset = rip_offset_list_lookup(NULL); | |
246 | if (offset && OFFSET_LIST_OUT_NAME(offset)) { | |
247 | alist = access_list_lookup(AFI_IP, | |
248 | OFFSET_LIST_OUT_NAME(offset)); | |
249 | ||
250 | if (alist | |
251 | && access_list_apply(alist, (struct prefix *)p) | |
252 | == FILTER_PERMIT) { | |
253 | *metric += OFFSET_LIST_OUT_METRIC(offset); | |
254 | return 1; | |
255 | } | |
256 | return 0; | |
257 | } | |
258 | return 0; | |
259 | } | |
260 | ||
261 | DEFUN (rip_offset_list, | |
262 | rip_offset_list_cmd, | |
263 | "offset-list WORD <in|out> (0-16)", | |
264 | "Modify RIP metric\n" | |
265 | "Access-list name\n" | |
266 | "For incoming updates\n" | |
267 | "For outgoing updates\n" | |
268 | "Metric value\n") | |
269 | { | |
270 | int idx_word = 1; | |
271 | int idx_in_out = 2; | |
272 | int idx_number = 3; | |
273 | return rip_offset_list_set(vty, argv[idx_word]->arg, | |
274 | argv[idx_in_out]->arg, argv[idx_number]->arg, | |
275 | NULL); | |
276 | } | |
277 | ||
278 | DEFUN (rip_offset_list_ifname, | |
279 | rip_offset_list_ifname_cmd, | |
280 | "offset-list WORD <in|out> (0-16) IFNAME", | |
281 | "Modify RIP metric\n" | |
282 | "Access-list name\n" | |
283 | "For incoming updates\n" | |
284 | "For outgoing updates\n" | |
285 | "Metric value\n" | |
286 | "Interface to match\n") | |
287 | { | |
288 | int idx_word = 1; | |
289 | int idx_in_out = 2; | |
290 | int idx_number = 3; | |
291 | int idx_ifname = 4; | |
292 | return rip_offset_list_set(vty, argv[idx_word]->arg, | |
293 | argv[idx_in_out]->arg, argv[idx_number]->arg, | |
294 | argv[idx_ifname]->arg); | |
295 | } | |
296 | ||
297 | DEFUN (no_rip_offset_list, | |
298 | no_rip_offset_list_cmd, | |
299 | "no offset-list WORD <in|out> (0-16)", | |
300 | NO_STR | |
301 | "Modify RIP metric\n" | |
302 | "Access-list name\n" | |
303 | "For incoming updates\n" | |
304 | "For outgoing updates\n" | |
305 | "Metric value\n") | |
306 | { | |
307 | int idx_word = 2; | |
308 | int idx_in_out = 3; | |
309 | int idx_number = 4; | |
310 | return rip_offset_list_unset(vty, argv[idx_word]->arg, | |
311 | argv[idx_in_out]->arg, | |
312 | argv[idx_number]->arg, NULL); | |
313 | } | |
314 | ||
315 | DEFUN (no_rip_offset_list_ifname, | |
316 | no_rip_offset_list_ifname_cmd, | |
317 | "no offset-list WORD <in|out> (0-16) IFNAME", | |
318 | NO_STR | |
319 | "Modify RIP metric\n" | |
320 | "Access-list name\n" | |
321 | "For incoming updates\n" | |
322 | "For outgoing updates\n" | |
323 | "Metric value\n" | |
324 | "Interface to match\n") | |
325 | { | |
326 | int idx_word = 2; | |
327 | int idx_in_out = 3; | |
328 | int idx_number = 4; | |
329 | int idx_ifname = 5; | |
330 | return rip_offset_list_unset( | |
331 | vty, argv[idx_word]->arg, argv[idx_in_out]->arg, | |
332 | argv[idx_number]->arg, argv[idx_ifname]->arg); | |
333 | } | |
334 | ||
335 | static int offset_list_cmp(struct rip_offset_list *o1, | |
336 | struct rip_offset_list *o2) | |
337 | { | |
338 | return strcmp_safe(o1->ifname, o2->ifname); | |
339 | } | |
340 | ||
341 | static void offset_list_del(struct rip_offset_list *offset) | |
342 | { | |
343 | if (OFFSET_LIST_IN_NAME(offset)) | |
344 | free(OFFSET_LIST_IN_NAME(offset)); | |
345 | if (OFFSET_LIST_OUT_NAME(offset)) | |
346 | free(OFFSET_LIST_OUT_NAME(offset)); | |
347 | if (offset->ifname) | |
348 | free(offset->ifname); | |
349 | rip_offset_list_free(offset); | |
350 | } | |
351 | ||
352 | void rip_offset_init() | |
353 | { | |
354 | rip_offset_list_master = list_new(); | |
355 | rip_offset_list_master->cmp = (int (*)(void *, void *))offset_list_cmp; | |
356 | rip_offset_list_master->del = (void (*)(void *))offset_list_del; | |
357 | ||
358 | install_element(RIP_NODE, &rip_offset_list_cmd); | |
359 | install_element(RIP_NODE, &rip_offset_list_ifname_cmd); | |
360 | install_element(RIP_NODE, &no_rip_offset_list_cmd); | |
361 | install_element(RIP_NODE, &no_rip_offset_list_ifname_cmd); | |
362 | } | |
363 | ||
364 | void rip_offset_clean() | |
365 | { | |
366 | list_delete_and_null(&rip_offset_list_master); | |
367 | ||
368 | rip_offset_list_master = list_new(); | |
369 | rip_offset_list_master->cmp = (int (*)(void *, void *))offset_list_cmp; | |
370 | rip_offset_list_master->del = (void (*)(void *))offset_list_del; | |
371 | } | |
372 | ||
373 | int config_write_rip_offset_list(struct vty *vty) | |
374 | { | |
375 | struct listnode *node, *nnode; | |
376 | struct rip_offset_list *offset; | |
377 | ||
378 | for (ALL_LIST_ELEMENTS(rip_offset_list_master, node, nnode, offset)) { | |
379 | if (!offset->ifname) { | |
380 | if (offset->direct[RIP_OFFSET_LIST_IN].alist_name) | |
381 | vty_out(vty, " offset-list %s in %d\n", | |
382 | offset->direct[RIP_OFFSET_LIST_IN] | |
383 | .alist_name, | |
384 | offset->direct[RIP_OFFSET_LIST_IN] | |
385 | .metric); | |
386 | if (offset->direct[RIP_OFFSET_LIST_OUT].alist_name) | |
387 | vty_out(vty, " offset-list %s out %d\n", | |
388 | offset->direct[RIP_OFFSET_LIST_OUT] | |
389 | .alist_name, | |
390 | offset->direct[RIP_OFFSET_LIST_OUT] | |
391 | .metric); | |
392 | } else { | |
393 | if (offset->direct[RIP_OFFSET_LIST_IN].alist_name) | |
394 | vty_out(vty, " offset-list %s in %d %s\n", | |
395 | offset->direct[RIP_OFFSET_LIST_IN] | |
396 | .alist_name, | |
397 | offset->direct[RIP_OFFSET_LIST_IN] | |
398 | .metric, | |
399 | offset->ifname); | |
400 | if (offset->direct[RIP_OFFSET_LIST_OUT].alist_name) | |
401 | vty_out(vty, " offset-list %s out %d %s\n", | |
402 | offset->direct[RIP_OFFSET_LIST_OUT] | |
403 | .alist_name, | |
404 | offset->direct[RIP_OFFSET_LIST_OUT] | |
405 | .metric, | |
406 | offset->ifname); | |
407 | } | |
408 | } | |
409 | ||
410 | return 0; | |
411 | } |