Line data Source code
1 : /*
2 : * Zebra SRv6 VTY functions
3 : * Copyright (C) 2020 Hiroki Shirokura, LINE Corporation
4 : *
5 : * This program is free software; you can redistribute it and/or modify it
6 : * under the terms of the GNU General Public License as published by the Free
7 : * Software Foundation; either version 2 of the License, or (at your option)
8 : * any later version.
9 : *
10 : * This program is distributed in the hope that it will be useful, but WITHOUT
11 : * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 : * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 : * more details.
14 : *
15 : * You should have received a copy of the GNU General Public License along
16 : * with this program; see the file COPYING; if not, write to the Free Software
17 : * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
18 : */
19 :
20 : #include <zebra.h>
21 :
22 : #include "memory.h"
23 : #include "if.h"
24 : #include "prefix.h"
25 : #include "command.h"
26 : #include "table.h"
27 : #include "rib.h"
28 : #include "nexthop.h"
29 : #include "vrf.h"
30 : #include "srv6.h"
31 : #include "lib/json.h"
32 :
33 : #include "zebra/zserv.h"
34 : #include "zebra/zebra_router.h"
35 : #include "zebra/zebra_vrf.h"
36 : #include "zebra/zebra_srv6.h"
37 : #include "zebra/zebra_srv6_vty.h"
38 : #include "zebra/zebra_rnh.h"
39 : #include "zebra/redistribute.h"
40 : #include "zebra/zebra_routemap.h"
41 : #include "zebra/zebra_dplane.h"
42 :
43 : #include "zebra/zebra_srv6_vty_clippy.c"
44 :
45 : static int zebra_sr_config(struct vty *vty);
46 :
47 : static struct cmd_node sr_node = {
48 : .name = "sr",
49 : .node = SEGMENT_ROUTING_NODE,
50 : .parent_node = CONFIG_NODE,
51 : .prompt = "%s(config-sr)# ",
52 : .config_write = zebra_sr_config,
53 : };
54 :
55 : static struct cmd_node srv6_node = {
56 : .name = "srv6",
57 : .node = SRV6_NODE,
58 : .parent_node = SEGMENT_ROUTING_NODE,
59 : .prompt = "%s(config-srv6)# ",
60 :
61 : };
62 :
63 : static struct cmd_node srv6_locs_node = {
64 : .name = "srv6-locators",
65 : .node = SRV6_LOCS_NODE,
66 : .parent_node = SRV6_NODE,
67 : .prompt = "%s(config-srv6-locators)# ",
68 : };
69 :
70 : static struct cmd_node srv6_loc_node = {
71 : .name = "srv6-locator",
72 : .node = SRV6_LOC_NODE,
73 : .parent_node = SRV6_LOCS_NODE,
74 : .prompt = "%s(config-srv6-locator)# "
75 : };
76 :
77 0 : DEFUN (show_srv6_locator,
78 : show_srv6_locator_cmd,
79 : "show segment-routing srv6 locator [json]",
80 : SHOW_STR
81 : "Segment Routing\n"
82 : "Segment Routing SRv6\n"
83 : "Locator Information\n"
84 : JSON_STR)
85 : {
86 0 : const bool uj = use_json(argc, argv);
87 0 : struct zebra_srv6 *srv6 = zebra_srv6_get_default();
88 0 : struct srv6_locator *locator;
89 0 : struct listnode *node;
90 0 : char str[256];
91 0 : int id;
92 0 : json_object *json = NULL;
93 0 : json_object *json_locators = NULL;
94 0 : json_object *json_locator = NULL;
95 :
96 0 : if (uj) {
97 0 : json = json_object_new_object();
98 0 : json_locators = json_object_new_array();
99 0 : json_object_object_add(json, "locators", json_locators);
100 :
101 0 : for (ALL_LIST_ELEMENTS_RO(srv6->locators, node, locator)) {
102 0 : json_locator = srv6_locator_json(locator);
103 0 : if (!json_locator)
104 0 : continue;
105 0 : json_object_array_add(json_locators, json_locator);
106 :
107 : }
108 :
109 0 : vty_json(vty, json);
110 : } else {
111 0 : vty_out(vty, "Locator:\n");
112 0 : vty_out(vty, "Name ID Prefix Status\n");
113 0 : vty_out(vty, "-------------------- ------- ------------------------ -------\n");
114 :
115 0 : id = 1;
116 0 : for (ALL_LIST_ELEMENTS_RO(srv6->locators, node, locator)) {
117 0 : prefix2str(&locator->prefix, str, sizeof(str));
118 0 : vty_out(vty, "%-20s %7d %-24s %s\n",
119 0 : locator->name, id, str,
120 0 : locator->status_up ? "Up" : "Down");
121 0 : ++id;
122 : }
123 0 : vty_out(vty, "\n");
124 : }
125 :
126 0 : return CMD_SUCCESS;
127 : }
128 :
129 0 : DEFUN (show_srv6_locator_detail,
130 : show_srv6_locator_detail_cmd,
131 : "show segment-routing srv6 locator NAME detail [json]",
132 : SHOW_STR
133 : "Segment Routing\n"
134 : "Segment Routing SRv6\n"
135 : "Locator Information\n"
136 : "Locator Name\n"
137 : "Detailed information\n"
138 : JSON_STR)
139 : {
140 0 : const bool uj = use_json(argc, argv);
141 0 : struct zebra_srv6 *srv6 = zebra_srv6_get_default();
142 0 : struct srv6_locator *locator;
143 0 : struct listnode *node;
144 0 : char str[256];
145 0 : const char *locator_name = argv[4]->arg;
146 0 : json_object *json_locator = NULL;
147 :
148 0 : if (uj) {
149 0 : locator = zebra_srv6_locator_lookup(locator_name);
150 0 : if (!locator)
151 : return CMD_WARNING;
152 :
153 0 : json_locator = srv6_locator_detailed_json(locator);
154 0 : vty_json(vty, json_locator);
155 0 : return CMD_SUCCESS;
156 : }
157 :
158 0 : for (ALL_LIST_ELEMENTS_RO(srv6->locators, node, locator)) {
159 0 : struct listnode *node;
160 0 : struct srv6_locator_chunk *chunk;
161 :
162 0 : if (strcmp(locator->name, locator_name) != 0)
163 0 : continue;
164 :
165 0 : prefix2str(&locator->prefix, str, sizeof(str));
166 0 : vty_out(vty, "Name: %s\n", locator->name);
167 0 : vty_out(vty, "Prefix: %s\n", str);
168 0 : vty_out(vty, "Block-Bit-Len: %u\n", locator->block_bits_length);
169 0 : vty_out(vty, "Node-Bit-Len: %u\n", locator->node_bits_length);
170 0 : vty_out(vty, "Function-Bit-Len: %u\n",
171 0 : locator->function_bits_length);
172 0 : vty_out(vty, "Argument-Bit-Len: %u\n",
173 0 : locator->argument_bits_length);
174 :
175 0 : if (CHECK_FLAG(locator->flags, SRV6_LOCATOR_USID))
176 0 : vty_out(vty, "Behavior: uSID\n");
177 :
178 0 : vty_out(vty, "Chunks:\n");
179 0 : for (ALL_LIST_ELEMENTS_RO((struct list *)locator->chunks, node,
180 : chunk)) {
181 0 : prefix2str(&chunk->prefix, str, sizeof(str));
182 0 : vty_out(vty, "- prefix: %s, owner: %s\n", str,
183 0 : zebra_route_string(chunk->proto));
184 : }
185 : }
186 :
187 :
188 : return CMD_SUCCESS;
189 : }
190 :
191 0 : DEFUN_NOSH (segment_routing,
192 : segment_routing_cmd,
193 : "segment-routing",
194 : "Segment Routing\n")
195 : {
196 0 : vty->node = SEGMENT_ROUTING_NODE;
197 0 : return CMD_SUCCESS;
198 : }
199 :
200 0 : DEFUN_NOSH (srv6,
201 : srv6_cmd,
202 : "srv6",
203 : "Segment Routing SRv6\n")
204 : {
205 0 : vty->node = SRV6_NODE;
206 0 : return CMD_SUCCESS;
207 : }
208 :
209 0 : DEFUN (no_srv6,
210 : no_srv6_cmd,
211 : "no srv6",
212 : NO_STR
213 : "Segment Routing SRv6\n")
214 : {
215 0 : struct zebra_srv6 *srv6 = zebra_srv6_get_default();
216 0 : struct srv6_locator *locator;
217 0 : struct listnode *node, *nnode;
218 :
219 0 : for (ALL_LIST_ELEMENTS(srv6->locators, node, nnode, locator))
220 0 : zebra_srv6_locator_delete(locator);
221 0 : return CMD_SUCCESS;
222 : }
223 :
224 0 : DEFUN_NOSH (srv6_locators,
225 : srv6_locators_cmd,
226 : "locators",
227 : "Segment Routing SRv6 locators\n")
228 : {
229 0 : vty->node = SRV6_LOCS_NODE;
230 0 : return CMD_SUCCESS;
231 : }
232 :
233 0 : DEFUN_NOSH (srv6_locator,
234 : srv6_locator_cmd,
235 : "locator WORD",
236 : "Segment Routing SRv6 locator\n"
237 : "Specify locator-name\n")
238 : {
239 0 : struct srv6_locator *locator = NULL;
240 :
241 0 : locator = zebra_srv6_locator_lookup(argv[1]->arg);
242 0 : if (locator) {
243 0 : VTY_PUSH_CONTEXT(SRV6_LOC_NODE, locator);
244 0 : locator->status_up = true;
245 0 : return CMD_SUCCESS;
246 : }
247 :
248 0 : locator = srv6_locator_alloc(argv[1]->arg);
249 0 : if (!locator) {
250 0 : vty_out(vty, "%% Alloc failed\n");
251 0 : return CMD_WARNING_CONFIG_FAILED;
252 : }
253 0 : locator->status_up = true;
254 :
255 0 : VTY_PUSH_CONTEXT(SRV6_LOC_NODE, locator);
256 0 : vty->node = SRV6_LOC_NODE;
257 0 : return CMD_SUCCESS;
258 : }
259 :
260 0 : DEFUN (no_srv6_locator,
261 : no_srv6_locator_cmd,
262 : "no locator WORD",
263 : NO_STR
264 : "Segment Routing SRv6 locator\n"
265 : "Specify locator-name\n")
266 : {
267 0 : struct srv6_locator *locator = zebra_srv6_locator_lookup(argv[2]->arg);
268 0 : if (!locator) {
269 0 : vty_out(vty, "%% Can't find SRv6 locator\n");
270 0 : return CMD_WARNING_CONFIG_FAILED;
271 : }
272 :
273 0 : zebra_srv6_locator_delete(locator);
274 0 : return CMD_SUCCESS;
275 : }
276 :
277 0 : DEFPY (locator_prefix,
278 : locator_prefix_cmd,
279 : "prefix X:X::X:X/M$prefix [block-len (16-64)$block_bit_len] \
280 : [node-len (16-64)$node_bit_len] [func-bits (0-64)$func_bit_len]",
281 : "Configure SRv6 locator prefix\n"
282 : "Specify SRv6 locator prefix\n"
283 : "Configure SRv6 locator block length in bits\n"
284 : "Specify SRv6 locator block length in bits\n"
285 : "Configure SRv6 locator node length in bits\n"
286 : "Specify SRv6 locator node length in bits\n"
287 : "Configure SRv6 locator function length in bits\n"
288 : "Specify SRv6 locator function length in bits\n")
289 : {
290 0 : VTY_DECLVAR_CONTEXT(srv6_locator, locator);
291 0 : struct srv6_locator_chunk *chunk = NULL;
292 0 : struct listnode *node = NULL;
293 :
294 0 : locator->prefix = *prefix;
295 0 : func_bit_len = func_bit_len ?: ZEBRA_SRV6_FUNCTION_LENGTH;
296 :
297 : /* Resolve optional arguments */
298 0 : if (block_bit_len == 0 && node_bit_len == 0) {
299 0 : block_bit_len =
300 0 : prefix->prefixlen - ZEBRA_SRV6_LOCATOR_NODE_LENGTH;
301 0 : node_bit_len = ZEBRA_SRV6_LOCATOR_NODE_LENGTH;
302 0 : } else if (block_bit_len == 0) {
303 0 : block_bit_len = prefix->prefixlen - node_bit_len;
304 0 : } else if (node_bit_len == 0) {
305 0 : node_bit_len = prefix->prefixlen - block_bit_len;
306 : } else {
307 0 : if (block_bit_len + node_bit_len != prefix->prefixlen) {
308 0 : vty_out(vty,
309 : "%% block-len + node-len must be equal to the selected prefix length %d\n",
310 : prefix->prefixlen);
311 0 : return CMD_WARNING_CONFIG_FAILED;
312 : }
313 : }
314 :
315 0 : if (prefix->prefixlen + func_bit_len + 0 > 128) {
316 0 : vty_out(vty,
317 : "%% prefix-len + function-len + arg-len (%ld) cannot be greater than 128\n",
318 : prefix->prefixlen + func_bit_len + 0);
319 0 : return CMD_WARNING_CONFIG_FAILED;
320 : }
321 :
322 : /*
323 : * Currently, the SID transposition algorithm implemented in bgpd
324 : * handles incorrectly the SRv6 locators with function length greater
325 : * than 20 bits. To prevent issues, we currently limit the function
326 : * length to 20 bits.
327 : * This limit will be removed when the bgpd SID transposition is fixed.
328 : */
329 0 : if (func_bit_len > 20) {
330 0 : vty_out(vty,
331 : "%% currently func_bit_len > 20 is not supported\n");
332 0 : return CMD_WARNING_CONFIG_FAILED;
333 : }
334 :
335 0 : locator->block_bits_length = block_bit_len;
336 0 : locator->node_bits_length = node_bit_len;
337 0 : locator->function_bits_length = func_bit_len;
338 0 : locator->argument_bits_length = 0;
339 :
340 0 : if (list_isempty(locator->chunks)) {
341 0 : chunk = srv6_locator_chunk_alloc();
342 0 : chunk->prefix = *prefix;
343 0 : chunk->proto = 0;
344 0 : listnode_add(locator->chunks, chunk);
345 : } else {
346 0 : for (ALL_LIST_ELEMENTS_RO(locator->chunks, node, chunk)) {
347 0 : uint8_t zero[16] = {0};
348 :
349 0 : if (memcmp(&chunk->prefix.prefix, zero, 16) == 0) {
350 0 : struct zserv *client;
351 0 : struct listnode *client_node;
352 :
353 0 : chunk->prefix = *prefix;
354 0 : for (ALL_LIST_ELEMENTS_RO(zrouter.client_list,
355 : client_node,
356 : client)) {
357 0 : struct srv6_locator *tmp;
358 :
359 0 : if (client->proto != chunk->proto)
360 0 : continue;
361 :
362 0 : srv6_manager_get_locator_chunk_call(
363 : &tmp, client,
364 0 : locator->name,
365 : VRF_DEFAULT);
366 : }
367 : }
368 : }
369 : }
370 :
371 0 : zebra_srv6_locator_add(locator);
372 0 : return CMD_SUCCESS;
373 : }
374 :
375 0 : DEFPY (locator_behavior,
376 : locator_behavior_cmd,
377 : "[no] behavior usid",
378 : NO_STR
379 : "Configure SRv6 behavior\n"
380 : "Specify SRv6 behavior uSID\n")
381 : {
382 0 : VTY_DECLVAR_CONTEXT(srv6_locator, locator);
383 :
384 0 : if (no && !CHECK_FLAG(locator->flags, SRV6_LOCATOR_USID))
385 : /* SRv6 locator uSID flag already unset, nothing to do */
386 : return CMD_SUCCESS;
387 :
388 0 : if (!no && CHECK_FLAG(locator->flags, SRV6_LOCATOR_USID))
389 : /* SRv6 locator uSID flag already set, nothing to do */
390 : return CMD_SUCCESS;
391 :
392 : /* Remove old locator from zclients */
393 0 : zebra_notify_srv6_locator_delete(locator);
394 :
395 : /* Set/Unset the SRV6_LOCATOR_USID */
396 0 : if (no)
397 0 : UNSET_FLAG(locator->flags, SRV6_LOCATOR_USID);
398 : else
399 0 : SET_FLAG(locator->flags, SRV6_LOCATOR_USID);
400 :
401 : /* Notify the new locator to zclients */
402 0 : zebra_notify_srv6_locator_add(locator);
403 :
404 0 : return CMD_SUCCESS;
405 : }
406 :
407 0 : static int zebra_sr_config(struct vty *vty)
408 : {
409 0 : struct zebra_srv6 *srv6 = zebra_srv6_get_default();
410 0 : struct listnode *node;
411 0 : struct srv6_locator *locator;
412 0 : char str[256];
413 :
414 0 : vty_out(vty, "!\n");
415 0 : if (zebra_srv6_is_enable()) {
416 0 : vty_out(vty, "segment-routing\n");
417 0 : vty_out(vty, " srv6\n");
418 0 : vty_out(vty, " locators\n");
419 0 : for (ALL_LIST_ELEMENTS_RO(srv6->locators, node, locator)) {
420 0 : inet_ntop(AF_INET6, &locator->prefix.prefix,
421 : str, sizeof(str));
422 0 : vty_out(vty, " locator %s\n", locator->name);
423 0 : vty_out(vty, " prefix %s/%u", str,
424 0 : locator->prefix.prefixlen);
425 0 : if (locator->block_bits_length)
426 0 : vty_out(vty, " block-len %u",
427 : locator->block_bits_length);
428 0 : if (locator->node_bits_length)
429 0 : vty_out(vty, " node-len %u",
430 : locator->node_bits_length);
431 0 : if (locator->function_bits_length)
432 0 : vty_out(vty, " func-bits %u",
433 : locator->function_bits_length);
434 0 : if (locator->argument_bits_length)
435 0 : vty_out(vty, " arg-len %u",
436 : locator->argument_bits_length);
437 0 : vty_out(vty, "\n");
438 0 : if (CHECK_FLAG(locator->flags, SRV6_LOCATOR_USID))
439 0 : vty_out(vty, " behavior usid\n");
440 0 : vty_out(vty, " exit\n");
441 0 : vty_out(vty, " !\n");
442 : }
443 0 : vty_out(vty, " exit\n");
444 0 : vty_out(vty, " !\n");
445 0 : vty_out(vty, " exit\n");
446 0 : vty_out(vty, " !\n");
447 0 : vty_out(vty, "exit\n");
448 0 : vty_out(vty, "!\n");
449 : }
450 0 : return 0;
451 : }
452 :
453 4 : void zebra_srv6_vty_init(void)
454 : {
455 : /* Install nodes and its default commands */
456 4 : install_node(&sr_node);
457 4 : install_node(&srv6_node);
458 4 : install_node(&srv6_locs_node);
459 4 : install_node(&srv6_loc_node);
460 4 : install_default(SEGMENT_ROUTING_NODE);
461 4 : install_default(SRV6_NODE);
462 4 : install_default(SRV6_LOCS_NODE);
463 4 : install_default(SRV6_LOC_NODE);
464 :
465 : /* Command for change node */
466 4 : install_element(CONFIG_NODE, &segment_routing_cmd);
467 4 : install_element(SEGMENT_ROUTING_NODE, &srv6_cmd);
468 4 : install_element(SEGMENT_ROUTING_NODE, &no_srv6_cmd);
469 4 : install_element(SRV6_NODE, &srv6_locators_cmd);
470 4 : install_element(SRV6_LOCS_NODE, &srv6_locator_cmd);
471 4 : install_element(SRV6_LOCS_NODE, &no_srv6_locator_cmd);
472 :
473 : /* Command for configuration */
474 4 : install_element(SRV6_LOC_NODE, &locator_prefix_cmd);
475 4 : install_element(SRV6_LOC_NODE, &locator_behavior_cmd);
476 :
477 : /* Command for operation */
478 4 : install_element(VIEW_NODE, &show_srv6_locator_cmd);
479 4 : install_element(VIEW_NODE, &show_srv6_locator_detail_cmd);
480 4 : }
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