Line data Source code
1 : /*
2 : * gre_interface.c: gre interfaces
3 : *
4 : * Copyright (c) 2012 Cisco and/or its affiliates.
5 : * Licensed under the Apache License, Version 2.0 (the "License");
6 : * you may not use this file except in compliance with the License.
7 : * You may obtain a copy of the License at:
8 : *
9 : * http://www.apache.org/licenses/LICENSE-2.0
10 : *
11 : * Unless required by applicable law or agreed to in writing, software
12 : * distributed under the License is distributed on an "AS IS" BASIS,
13 : * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 : * See the License for the specific language governing permissions and
15 : * limitations under the License.
16 : */
17 :
18 : #include <vnet/vnet.h>
19 : #include <gre/gre.h>
20 : #include <vnet/ip/format.h>
21 : #include <vnet/fib/fib_table.h>
22 : #include <vnet/adj/adj_midchain.h>
23 : #include <vnet/adj/adj_nbr.h>
24 : #include <vnet/mpls/mpls.h>
25 : #include <vnet/l2/l2_input.h>
26 : #include <vnet/teib/teib.h>
27 :
28 : u8 *
29 0 : format_gre_tunnel_type (u8 *s, va_list *args)
30 : {
31 0 : gre_tunnel_type_t type = va_arg (*args, int);
32 :
33 0 : switch (type)
34 : {
35 : #define _(n, v) \
36 : case GRE_TUNNEL_TYPE_##n: \
37 : s = format (s, "%s", v); \
38 : break;
39 0 : foreach_gre_tunnel_type
40 : #undef _
41 : }
42 :
43 0 : return (s);
44 : }
45 :
46 : static u8 *
47 0 : format_gre_tunnel (u8 *s, va_list *args)
48 : {
49 0 : gre_tunnel_t *t = va_arg (*args, gre_tunnel_t *);
50 :
51 0 : s = format (s, "[%d] instance %d src %U dst %U fib-idx %d sw-if-idx %d ",
52 : t->dev_instance, t->user_instance, format_ip46_address,
53 : &t->tunnel_src, IP46_TYPE_ANY, format_ip46_address,
54 : &t->tunnel_dst.fp_addr, IP46_TYPE_ANY, t->outer_fib_index,
55 : t->sw_if_index);
56 :
57 0 : s = format (s, "payload %U ", format_gre_tunnel_type, t->type);
58 0 : s = format (s, "%U ", format_tunnel_mode, t->mode);
59 :
60 0 : if (t->type == GRE_TUNNEL_TYPE_ERSPAN)
61 0 : s = format (s, "session %d ", t->session_id);
62 :
63 0 : if (t->type != GRE_TUNNEL_TYPE_L3)
64 0 : s = format (s, "l2-adj-idx %d ", t->l2_adj_index);
65 :
66 0 : return s;
67 : }
68 :
69 : static gre_tunnel_t *
70 95 : gre_tunnel_db_find (const vnet_gre_tunnel_add_del_args_t *a,
71 : u32 outer_fib_index, gre_tunnel_key_t *key)
72 : {
73 95 : gre_main_t *gm = &gre_main;
74 : uword *p;
75 :
76 95 : if (!a->is_ipv6)
77 : {
78 79 : gre_mk_key4 (a->src.ip4, a->dst.ip4, outer_fib_index, a->type, a->mode,
79 79 : a->session_id, &key->gtk_v4);
80 158 : p = hash_get_mem (gm->tunnel_by_key4, &key->gtk_v4);
81 : }
82 : else
83 : {
84 16 : gre_mk_key6 (&a->src.ip6, &a->dst.ip6, outer_fib_index, a->type, a->mode,
85 16 : a->session_id, &key->gtk_v6);
86 32 : p = hash_get_mem (gm->tunnel_by_key6, &key->gtk_v6);
87 : }
88 :
89 95 : if (NULL == p)
90 47 : return (NULL);
91 :
92 48 : return (pool_elt_at_index (gm->tunnels, p[0]));
93 : }
94 :
95 : static void
96 120 : gre_tunnel_db_add (gre_tunnel_t *t, gre_tunnel_key_t *key)
97 : {
98 120 : gre_main_t *gm = &gre_main;
99 :
100 120 : if (t->tunnel_dst.fp_proto == FIB_PROTOCOL_IP6)
101 : {
102 36 : hash_set_mem_alloc (&gm->tunnel_by_key6, &key->gtk_v6, t->dev_instance);
103 : }
104 : else
105 : {
106 84 : hash_set_mem_alloc (&gm->tunnel_by_key4, &key->gtk_v4, t->dev_instance);
107 : }
108 120 : }
109 :
110 : static void
111 120 : gre_tunnel_db_remove (gre_tunnel_t *t, gre_tunnel_key_t *key)
112 : {
113 120 : gre_main_t *gm = &gre_main;
114 :
115 120 : if (t->tunnel_dst.fp_proto == FIB_PROTOCOL_IP6)
116 : {
117 36 : hash_unset_mem_free (&gm->tunnel_by_key6, &key->gtk_v6);
118 : }
119 : else
120 : {
121 84 : hash_unset_mem_free (&gm->tunnel_by_key4, &key->gtk_v4);
122 : }
123 120 : }
124 :
125 : /**
126 : * gre_tunnel_stack
127 : *
128 : * 'stack' (resolve the recursion for) the tunnel's midchain adjacency
129 : */
130 : void
131 83 : gre_tunnel_stack (adj_index_t ai)
132 : {
133 83 : gre_main_t *gm = &gre_main;
134 : ip_adjacency_t *adj;
135 : gre_tunnel_t *gt;
136 : u32 sw_if_index;
137 :
138 83 : adj = adj_get (ai);
139 83 : sw_if_index = adj->rewrite_header.sw_if_index;
140 :
141 83 : if ((vec_len (gm->tunnel_index_by_sw_if_index) <= sw_if_index) ||
142 83 : (~0 == gm->tunnel_index_by_sw_if_index[sw_if_index]))
143 0 : return;
144 :
145 83 : gt = pool_elt_at_index (gm->tunnels,
146 : gm->tunnel_index_by_sw_if_index[sw_if_index]);
147 :
148 83 : if ((vnet_hw_interface_get_flags (vnet_get_main (), gt->hw_if_index) &
149 : VNET_HW_INTERFACE_FLAG_LINK_UP) == 0)
150 : {
151 36 : adj_midchain_delegate_unstack (ai);
152 : }
153 : else
154 : {
155 47 : adj_midchain_delegate_stack (ai, gt->outer_fib_index, >->tunnel_dst);
156 : }
157 : }
158 :
159 : /**
160 : * mgre_tunnel_stack
161 : *
162 : * 'stack' (resolve the recursion for) the tunnel's midchain adjacency
163 : */
164 : static void
165 60 : mgre_tunnel_stack (adj_index_t ai)
166 : {
167 60 : gre_main_t *gm = &gre_main;
168 : const ip_adjacency_t *adj;
169 : const gre_tunnel_t *gt;
170 : u32 sw_if_index;
171 :
172 60 : adj = adj_get (ai);
173 60 : sw_if_index = adj->rewrite_header.sw_if_index;
174 :
175 60 : if ((vec_len (gm->tunnel_index_by_sw_if_index) <= sw_if_index) ||
176 60 : (~0 == gm->tunnel_index_by_sw_if_index[sw_if_index]))
177 0 : return;
178 :
179 60 : gt = pool_elt_at_index (gm->tunnels,
180 : gm->tunnel_index_by_sw_if_index[sw_if_index]);
181 :
182 60 : if ((vnet_hw_interface_get_flags (vnet_get_main (), gt->hw_if_index) &
183 : VNET_HW_INTERFACE_FLAG_LINK_UP) == 0)
184 : {
185 36 : adj_midchain_delegate_unstack (ai);
186 : }
187 : else
188 : {
189 : const teib_entry_t *ne;
190 :
191 24 : ne = teib_entry_find_46 (sw_if_index, adj->ia_nh_proto,
192 : &adj->sub_type.nbr.next_hop);
193 24 : if (NULL != ne)
194 18 : teib_entry_adj_stack (ne, ai);
195 : }
196 : }
197 :
198 : /**
199 : * @brief Call back when restacking all adjacencies on a GRE interface
200 : */
201 : static adj_walk_rc_t
202 36 : gre_adj_walk_cb (adj_index_t ai, void *ctx)
203 : {
204 36 : gre_tunnel_stack (ai);
205 :
206 36 : return (ADJ_WALK_RC_CONTINUE);
207 : }
208 : static adj_walk_rc_t
209 60 : mgre_adj_walk_cb (adj_index_t ai, void *ctx)
210 : {
211 60 : mgre_tunnel_stack (ai);
212 :
213 60 : return (ADJ_WALK_RC_CONTINUE);
214 : }
215 :
216 : static void
217 116 : gre_tunnel_restack (gre_tunnel_t *gt)
218 : {
219 : fib_protocol_t proto;
220 :
221 : /*
222 : * walk all the adjacencies on th GRE interface and restack them
223 : */
224 348 : FOR_EACH_FIB_IP_PROTOCOL (proto)
225 : {
226 232 : switch (gt->mode)
227 : {
228 156 : case TUNNEL_MODE_P2P:
229 156 : adj_nbr_walk (gt->sw_if_index, proto, gre_adj_walk_cb, NULL);
230 156 : break;
231 76 : case TUNNEL_MODE_MP:
232 76 : adj_nbr_walk (gt->sw_if_index, proto, mgre_adj_walk_cb, NULL);
233 76 : break;
234 : }
235 232 : }
236 116 : }
237 :
238 : static void
239 146 : gre_teib_mk_key (const gre_tunnel_t *t, const teib_entry_t *ne,
240 : gre_tunnel_key_t *key)
241 : {
242 : const fib_prefix_t *nh;
243 :
244 146 : nh = teib_entry_get_nh (ne);
245 :
246 : /* construct the key using mode P2P so it can be found in the DP */
247 146 : if (FIB_PROTOCOL_IP4 == nh->fp_proto)
248 90 : gre_mk_key4 (t->tunnel_src.ip4, nh->fp_addr.ip4,
249 90 : teib_entry_get_fib_index (ne), t->type, TUNNEL_MODE_P2P, 0,
250 : &key->gtk_v4);
251 : else
252 56 : gre_mk_key6 (&t->tunnel_src.ip6, &nh->fp_addr.ip6,
253 56 : teib_entry_get_fib_index (ne), t->type, TUNNEL_MODE_P2P, 0,
254 : &key->gtk_v6);
255 146 : }
256 :
257 : /**
258 : * An TEIB entry has been added
259 : */
260 : static void
261 85 : gre_teib_entry_added (const teib_entry_t *ne)
262 : {
263 85 : gre_main_t *gm = &gre_main;
264 : const ip_address_t *nh;
265 : gre_tunnel_key_t key;
266 : gre_tunnel_t *t;
267 : u32 sw_if_index;
268 : u32 t_idx;
269 :
270 85 : sw_if_index = teib_entry_get_sw_if_index (ne);
271 85 : if (vec_len (gm->tunnel_index_by_sw_if_index) < sw_if_index)
272 12 : return;
273 :
274 73 : t_idx = gm->tunnel_index_by_sw_if_index[sw_if_index];
275 :
276 73 : if (INDEX_INVALID == t_idx)
277 0 : return;
278 :
279 : /* entry has been added on an interface for which there is a GRE tunnel */
280 73 : t = pool_elt_at_index (gm->tunnels, t_idx);
281 :
282 73 : if (t->mode != TUNNEL_MODE_MP)
283 0 : return;
284 :
285 : /* the next-hop (underlay) of the NHRP entry will form part of the key for
286 : * ingress lookup to match packets to this interface */
287 73 : gre_teib_mk_key (t, ne, &key);
288 73 : gre_tunnel_db_add (t, &key);
289 :
290 : /* update the rewrites for each of the adjacencies for this peer (overlay)
291 : * using the next-hop (underlay) */
292 73 : mgre_walk_ctx_t ctx = { .t = t, .ne = ne };
293 73 : nh = teib_entry_get_peer (ne);
294 73 : adj_nbr_walk_nh (
295 : teib_entry_get_sw_if_index (ne),
296 73 : (AF_IP4 == ip_addr_version (nh) ? FIB_PROTOCOL_IP4 : FIB_PROTOCOL_IP6),
297 : &ip_addr_46 (nh), mgre_mk_complete_walk, &ctx);
298 : }
299 :
300 : static void
301 85 : gre_teib_entry_deleted (const teib_entry_t *ne)
302 : {
303 85 : gre_main_t *gm = &gre_main;
304 : const ip_address_t *nh;
305 : gre_tunnel_key_t key;
306 : gre_tunnel_t *t;
307 : u32 sw_if_index;
308 : u32 t_idx;
309 :
310 85 : sw_if_index = teib_entry_get_sw_if_index (ne);
311 85 : if (vec_len (gm->tunnel_index_by_sw_if_index) < sw_if_index)
312 12 : return;
313 :
314 73 : t_idx = gm->tunnel_index_by_sw_if_index[sw_if_index];
315 :
316 73 : if (INDEX_INVALID == t_idx)
317 0 : return;
318 :
319 73 : t = pool_elt_at_index (gm->tunnels, t_idx);
320 :
321 : /* remove the next-hop as an ingress lookup key */
322 73 : gre_teib_mk_key (t, ne, &key);
323 73 : gre_tunnel_db_remove (t, &key);
324 :
325 73 : nh = teib_entry_get_peer (ne);
326 :
327 : /* make all the adjacencies incomplete */
328 73 : adj_nbr_walk_nh (
329 : teib_entry_get_sw_if_index (ne),
330 73 : (AF_IP4 == ip_addr_version (nh) ? FIB_PROTOCOL_IP4 : FIB_PROTOCOL_IP6),
331 : &ip_addr_46 (nh), mgre_mk_incomplete_walk, t);
332 : }
333 :
334 : static walk_rc_t
335 0 : gre_tunnel_delete_teib_walk (index_t nei, void *ctx)
336 : {
337 0 : gre_tunnel_t *t = ctx;
338 : gre_tunnel_key_t key;
339 :
340 0 : gre_teib_mk_key (t, teib_entry_get (nei), &key);
341 0 : gre_tunnel_db_remove (t, &key);
342 :
343 0 : return (WALK_CONTINUE);
344 : }
345 :
346 : static walk_rc_t
347 0 : gre_tunnel_add_teib_walk (index_t nei, void *ctx)
348 : {
349 0 : gre_tunnel_t *t = ctx;
350 0 : gre_tunnel_key_t key = {};
351 :
352 0 : gre_teib_mk_key (t, teib_entry_get (nei), &key);
353 0 : gre_tunnel_db_add (t, &key);
354 :
355 0 : return (WALK_CONTINUE);
356 : }
357 :
358 : static int
359 48 : vnet_gre_tunnel_add (vnet_gre_tunnel_add_del_args_t *a, u32 outer_fib_index,
360 : u32 *sw_if_indexp)
361 : {
362 48 : gre_main_t *gm = &gre_main;
363 48 : vnet_main_t *vnm = gm->vnet_main;
364 : gre_tunnel_t *t;
365 : vnet_hw_interface_t *hi;
366 : u32 hw_if_index, sw_if_index;
367 48 : u8 is_ipv6 = a->is_ipv6;
368 : gre_tunnel_key_t key;
369 :
370 48 : t = gre_tunnel_db_find (a, outer_fib_index, &key);
371 48 : if (NULL != t)
372 1 : return VNET_API_ERROR_IF_ALREADY_EXISTS;
373 :
374 47 : pool_get_aligned (gm->tunnels, t, CLIB_CACHE_LINE_BYTES);
375 47 : clib_memset (t, 0, sizeof (*t));
376 :
377 : /* Reconcile the real dev_instance and a possible requested instance */
378 47 : u32 t_idx = t - gm->tunnels; /* tunnel index (or instance) */
379 47 : u32 u_idx = a->instance; /* user specified instance */
380 47 : if (u_idx == ~0)
381 47 : u_idx = t_idx;
382 47 : if (hash_get (gm->instance_used, u_idx))
383 : {
384 0 : pool_put (gm->tunnels, t);
385 0 : return VNET_API_ERROR_INSTANCE_IN_USE;
386 : }
387 47 : hash_set (gm->instance_used, u_idx, 1);
388 :
389 47 : t->dev_instance = t_idx; /* actual */
390 47 : t->user_instance = u_idx; /* name */
391 :
392 47 : t->type = a->type;
393 47 : t->mode = a->mode;
394 47 : t->flags = a->flags;
395 47 : if (t->type == GRE_TUNNEL_TYPE_ERSPAN)
396 1 : t->session_id = a->session_id;
397 :
398 47 : if (t->type == GRE_TUNNEL_TYPE_L3)
399 : {
400 31 : if (t->mode == TUNNEL_MODE_P2P)
401 : hw_if_index =
402 24 : vnet_register_interface (vnm, gre_device_class.index, t_idx,
403 : gre_hw_interface_class.index, t_idx);
404 : else
405 : hw_if_index =
406 7 : vnet_register_interface (vnm, gre_device_class.index, t_idx,
407 : mgre_hw_interface_class.index, t_idx);
408 : }
409 : else
410 : {
411 16 : vnet_eth_interface_registration_t eir = {};
412 :
413 : /* Default MAC address (d00b:eed0:0000 + sw_if_index) */
414 16 : u8 address[6] = {
415 16 : 0xd0, 0x0b, 0xee, 0xd0, (u8) (t_idx >> 8), (u8) t_idx
416 : };
417 :
418 16 : eir.dev_class_index = gre_device_class.index;
419 16 : eir.dev_instance = t_idx;
420 16 : eir.address = address;
421 16 : hw_if_index = vnet_eth_register_interface (vnm, &eir);
422 : }
423 :
424 : /* Set GRE tunnel interface output node (not used for L3 payload) */
425 47 : if (GRE_TUNNEL_TYPE_ERSPAN == t->type)
426 1 : vnet_set_interface_output_node (vnm, hw_if_index,
427 : gre_erspan_encap_node.index);
428 : else
429 46 : vnet_set_interface_output_node (vnm, hw_if_index,
430 : gre_teb_encap_node.index);
431 :
432 47 : hi = vnet_get_hw_interface (vnm, hw_if_index);
433 47 : sw_if_index = hi->sw_if_index;
434 :
435 47 : t->hw_if_index = hw_if_index;
436 47 : t->outer_fib_index = outer_fib_index;
437 47 : t->sw_if_index = sw_if_index;
438 47 : t->l2_adj_index = ADJ_INDEX_INVALID;
439 :
440 135 : vec_validate_init_empty (gm->tunnel_index_by_sw_if_index, sw_if_index, ~0);
441 47 : gm->tunnel_index_by_sw_if_index[sw_if_index] = t_idx;
442 :
443 47 : if (!is_ipv6)
444 : {
445 39 : hi->frame_overhead = sizeof (gre_header_t) + sizeof (ip4_header_t);
446 39 : hi->min_frame_size = hi->frame_overhead + 64;
447 : }
448 : else
449 : {
450 8 : hi->frame_overhead = sizeof (gre_header_t) + sizeof (ip6_header_t);
451 8 : hi->min_frame_size = hi->frame_overhead + 64;
452 : }
453 :
454 : /* Standard default gre MTU. */
455 47 : vnet_sw_interface_set_mtu (vnm, sw_if_index, 9000);
456 :
457 : /*
458 : * source the FIB entry for the tunnel's destination
459 : * and become a child thereof. The tunnel will then get poked
460 : * when the forwarding for the entry updates, and the tunnel can
461 : * re-stack accordingly
462 : */
463 :
464 47 : clib_memcpy (&t->tunnel_src, &a->src, sizeof (t->tunnel_src));
465 47 : t->tunnel_dst.fp_len = !is_ipv6 ? 32 : 128;
466 47 : t->tunnel_dst.fp_proto = !is_ipv6 ? FIB_PROTOCOL_IP4 : FIB_PROTOCOL_IP6;
467 47 : t->tunnel_dst.fp_addr = a->dst;
468 :
469 47 : gre_tunnel_db_add (t, &key);
470 :
471 47 : if (t->mode == TUNNEL_MODE_MP)
472 7 : teib_walk_itf (t->sw_if_index, gre_tunnel_add_teib_walk, t);
473 :
474 47 : if (t->type == GRE_TUNNEL_TYPE_ERSPAN)
475 : {
476 : gre_sn_key_t skey;
477 : gre_sn_t *gre_sn;
478 :
479 1 : gre_mk_sn_key (t, &skey);
480 1 : gre_sn = (gre_sn_t *) hash_get_mem (gm->seq_num_by_key, &skey);
481 1 : if (gre_sn != NULL)
482 : {
483 0 : gre_sn->ref_count++;
484 0 : t->gre_sn = gre_sn;
485 : }
486 : else
487 : {
488 1 : gre_sn = clib_mem_alloc (sizeof (gre_sn_t));
489 1 : gre_sn->seq_num = 0;
490 1 : gre_sn->ref_count = 1;
491 1 : t->gre_sn = gre_sn;
492 1 : hash_set_mem_alloc (&gm->seq_num_by_key, &skey, (uword) gre_sn);
493 : }
494 : }
495 :
496 47 : if (t->type != GRE_TUNNEL_TYPE_L3)
497 : {
498 32 : t->l2_adj_index = adj_nbr_add_or_lock (
499 16 : t->tunnel_dst.fp_proto, VNET_LINK_ETHERNET, &zero_addr, sw_if_index);
500 16 : vnet_set_interface_l3_output_node (gm->vlib_main, sw_if_index,
501 : (u8 *) "tunnel-output-no-count");
502 16 : gre_update_adj (vnm, t->sw_if_index, t->l2_adj_index);
503 : }
504 : else
505 : {
506 31 : vnet_set_interface_l3_output_node (gm->vlib_main, sw_if_index,
507 : (u8 *) "tunnel-output");
508 : }
509 47 : if (sw_if_indexp)
510 47 : *sw_if_indexp = sw_if_index;
511 :
512 : /* register gre46-input nodes */
513 47 : ip4_register_protocol (IP_PROTOCOL_GRE, gre4_input_node.index);
514 47 : ip6_register_protocol (IP_PROTOCOL_GRE, gre6_input_node.index);
515 :
516 47 : return 0;
517 : }
518 :
519 : static int
520 47 : vnet_gre_tunnel_delete (vnet_gre_tunnel_add_del_args_t *a, u32 outer_fib_index,
521 : u32 *sw_if_indexp)
522 : {
523 47 : gre_main_t *gm = &gre_main;
524 47 : vnet_main_t *vnm = gm->vnet_main;
525 : gre_tunnel_t *t;
526 : gre_tunnel_key_t key;
527 : u32 sw_if_index;
528 :
529 47 : t = gre_tunnel_db_find (a, outer_fib_index, &key);
530 47 : if (NULL == t)
531 0 : return VNET_API_ERROR_NO_SUCH_ENTRY;
532 :
533 47 : if (t->mode == TUNNEL_MODE_MP)
534 7 : teib_walk_itf (t->sw_if_index, gre_tunnel_delete_teib_walk, t);
535 :
536 47 : sw_if_index = t->sw_if_index;
537 47 : vnet_sw_interface_set_flags (vnm, sw_if_index, 0 /* down */);
538 :
539 : /* make sure tunnel is removed from l2 bd or xconnect */
540 47 : set_int_l2_mode (gm->vlib_main, vnm, MODE_L3, sw_if_index, 0,
541 : L2_BD_PORT_TYPE_NORMAL, 0, 0);
542 47 : gm->tunnel_index_by_sw_if_index[sw_if_index] = ~0;
543 :
544 47 : if (t->type == GRE_TUNNEL_TYPE_L3)
545 31 : vnet_delete_hw_interface (vnm, t->hw_if_index);
546 : else
547 16 : ethernet_delete_interface (vnm, t->hw_if_index);
548 :
549 47 : if (t->l2_adj_index != ADJ_INDEX_INVALID)
550 : {
551 16 : adj_midchain_delegate_unstack (t->l2_adj_index);
552 16 : adj_unlock (t->l2_adj_index);
553 : }
554 :
555 47 : ASSERT ((t->type != GRE_TUNNEL_TYPE_ERSPAN) || (t->gre_sn != NULL));
556 47 : if ((t->type == GRE_TUNNEL_TYPE_ERSPAN) && (t->gre_sn->ref_count-- == 1))
557 : {
558 : gre_sn_key_t skey;
559 1 : gre_mk_sn_key (t, &skey);
560 1 : hash_unset_mem_free (&gm->seq_num_by_key, &skey);
561 1 : clib_mem_free (t->gre_sn);
562 : }
563 :
564 47 : vnet_reset_interface_l3_output_node (gm->vlib_main, sw_if_index);
565 47 : hash_unset (gm->instance_used, t->user_instance);
566 47 : gre_tunnel_db_remove (t, &key);
567 47 : pool_put (gm->tunnels, t);
568 :
569 47 : if (sw_if_indexp)
570 47 : *sw_if_indexp = sw_if_index;
571 :
572 47 : return 0;
573 : }
574 :
575 : int
576 95 : vnet_gre_tunnel_add_del (vnet_gre_tunnel_add_del_args_t *a, u32 *sw_if_indexp)
577 : {
578 : u32 outer_fib_index;
579 :
580 95 : outer_fib_index = fib_table_find (
581 95 : (a->is_ipv6 ? FIB_PROTOCOL_IP6 : FIB_PROTOCOL_IP4), a->outer_table_id);
582 :
583 95 : if (~0 == outer_fib_index)
584 0 : return VNET_API_ERROR_NO_SUCH_FIB;
585 :
586 95 : if (a->session_id > GTK_SESSION_ID_MAX)
587 0 : return VNET_API_ERROR_INVALID_SESSION_ID;
588 :
589 95 : if (a->mode == TUNNEL_MODE_MP && !ip46_address_is_zero (&a->dst))
590 0 : return (VNET_API_ERROR_INVALID_DST_ADDRESS);
591 :
592 95 : if (a->is_add)
593 48 : return (vnet_gre_tunnel_add (a, outer_fib_index, sw_if_indexp));
594 : else
595 47 : return (vnet_gre_tunnel_delete (a, outer_fib_index, sw_if_indexp));
596 : }
597 :
598 : clib_error_t *
599 116 : gre_interface_admin_up_down (vnet_main_t *vnm, u32 hw_if_index, u32 flags)
600 : {
601 116 : gre_main_t *gm = &gre_main;
602 : vnet_hw_interface_t *hi;
603 : gre_tunnel_t *t;
604 : u32 ti;
605 :
606 116 : hi = vnet_get_hw_interface (vnm, hw_if_index);
607 :
608 232 : if (NULL == gm->tunnel_index_by_sw_if_index ||
609 116 : hi->sw_if_index >= vec_len (gm->tunnel_index_by_sw_if_index))
610 0 : return (NULL);
611 :
612 116 : ti = gm->tunnel_index_by_sw_if_index[hi->sw_if_index];
613 :
614 116 : if (~0 == ti)
615 : /* not one of ours */
616 0 : return (NULL);
617 :
618 116 : t = pool_elt_at_index (gm->tunnels, ti);
619 :
620 116 : if (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
621 58 : vnet_hw_interface_set_flags (vnm, hw_if_index,
622 : VNET_HW_INTERFACE_FLAG_LINK_UP);
623 : else
624 58 : vnet_hw_interface_set_flags (vnm, hw_if_index, 0 /* down */);
625 :
626 116 : gre_tunnel_restack (t);
627 :
628 116 : return /* no error */ 0;
629 : }
630 :
631 : static clib_error_t *
632 0 : create_gre_tunnel_command_fn (vlib_main_t *vm, unformat_input_t *input,
633 : vlib_cli_command_t *cmd)
634 : {
635 0 : unformat_input_t _line_input, *line_input = &_line_input;
636 0 : vnet_gre_tunnel_add_del_args_t _a, *a = &_a;
637 0 : ip46_address_t src = ip46_address_initializer,
638 0 : dst = ip46_address_initializer;
639 0 : u32 instance = ~0;
640 0 : u32 outer_table_id = 0;
641 0 : gre_tunnel_type_t t_type = GRE_TUNNEL_TYPE_L3;
642 0 : tunnel_mode_t t_mode = TUNNEL_MODE_P2P;
643 0 : tunnel_encap_decap_flags_t flags = TUNNEL_ENCAP_DECAP_FLAG_NONE;
644 0 : u32 session_id = 0;
645 : int rv;
646 0 : u8 is_add = 1;
647 : u32 sw_if_index;
648 0 : clib_error_t *error = NULL;
649 :
650 : /* Get a line of input. */
651 0 : if (!unformat_user (input, unformat_line_input, line_input))
652 0 : return 0;
653 :
654 0 : while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
655 : {
656 0 : if (unformat (line_input, "del"))
657 0 : is_add = 0;
658 0 : else if (unformat (line_input, "instance %d", &instance))
659 : ;
660 0 : else if (unformat (line_input, "src %U", unformat_ip46_address, &src))
661 : ;
662 0 : else if (unformat (line_input, "dst %U", unformat_ip46_address, &dst))
663 : ;
664 0 : else if (unformat (line_input, "outer-table-id %d", &outer_table_id))
665 : ;
666 0 : else if (unformat (line_input, "multipoint"))
667 0 : t_mode = TUNNEL_MODE_MP;
668 0 : else if (unformat (line_input, "teb"))
669 0 : t_type = GRE_TUNNEL_TYPE_TEB;
670 0 : else if (unformat (line_input, "erspan %d", &session_id))
671 0 : t_type = GRE_TUNNEL_TYPE_ERSPAN;
672 0 : else if (unformat (line_input, "flags %U",
673 : unformat_tunnel_encap_decap_flags, &flags))
674 : ;
675 : else
676 : {
677 0 : error = clib_error_return (0, "unknown input `%U'",
678 : format_unformat_error, line_input);
679 0 : goto done;
680 : }
681 : }
682 :
683 0 : if (ip46_address_is_equal (&src, &dst))
684 : {
685 0 : error = clib_error_return (0, "src and dst are identical");
686 0 : goto done;
687 : }
688 :
689 0 : if (t_mode != TUNNEL_MODE_MP && ip46_address_is_zero (&dst))
690 : {
691 0 : error = clib_error_return (0, "destination address not specified");
692 0 : goto done;
693 : }
694 :
695 0 : if (ip46_address_is_zero (&src))
696 : {
697 0 : error = clib_error_return (0, "source address not specified");
698 0 : goto done;
699 : }
700 :
701 0 : if (ip46_address_is_ip4 (&src) != ip46_address_is_ip4 (&dst))
702 : {
703 0 : error = clib_error_return (0, "src and dst address must be the same AF");
704 0 : goto done;
705 : }
706 :
707 0 : clib_memset (a, 0, sizeof (*a));
708 0 : a->is_add = is_add;
709 0 : a->outer_table_id = outer_table_id;
710 0 : a->type = t_type;
711 0 : a->mode = t_mode;
712 0 : a->session_id = session_id;
713 0 : a->is_ipv6 = !ip46_address_is_ip4 (&src);
714 0 : a->instance = instance;
715 0 : a->flags = flags;
716 0 : clib_memcpy (&a->src, &src, sizeof (a->src));
717 0 : clib_memcpy (&a->dst, &dst, sizeof (a->dst));
718 :
719 0 : rv = vnet_gre_tunnel_add_del (a, &sw_if_index);
720 :
721 0 : switch (rv)
722 : {
723 0 : case 0:
724 0 : vlib_cli_output (vm, "%U\n", format_vnet_sw_if_index_name,
725 : vnet_get_main (), sw_if_index);
726 0 : break;
727 0 : case VNET_API_ERROR_IF_ALREADY_EXISTS:
728 0 : error = clib_error_return (0, "GRE tunnel already exists...");
729 0 : goto done;
730 0 : case VNET_API_ERROR_NO_SUCH_FIB:
731 0 : error = clib_error_return (0, "outer table ID %d doesn't exist\n",
732 : outer_table_id);
733 0 : goto done;
734 0 : case VNET_API_ERROR_NO_SUCH_ENTRY:
735 0 : error = clib_error_return (0, "GRE tunnel doesn't exist");
736 0 : goto done;
737 0 : case VNET_API_ERROR_INVALID_SESSION_ID:
738 : error =
739 0 : clib_error_return (0, "session ID %d out of range\n", session_id);
740 0 : goto done;
741 0 : case VNET_API_ERROR_INSTANCE_IN_USE:
742 0 : error = clib_error_return (0, "Instance is in use");
743 0 : goto done;
744 0 : default:
745 0 : error = clib_error_return (0, "vnet_gre_tunnel_add_del returned %d", rv);
746 0 : goto done;
747 : }
748 :
749 0 : done:
750 0 : unformat_free (line_input);
751 :
752 0 : return error;
753 : }
754 :
755 : /* *INDENT-OFF* */
756 220777 : VLIB_CLI_COMMAND (create_gre_tunnel_command, static) = {
757 : .path = "create gre tunnel",
758 : .short_help = "create gre tunnel src <addr> dst <addr> [instance <n>] "
759 : "[outer-fib-id <fib>] [teb | erspan <session-id>] [del] "
760 : "[multipoint]",
761 : .function = create_gre_tunnel_command_fn,
762 : };
763 : /* *INDENT-ON* */
764 :
765 : static clib_error_t *
766 0 : show_gre_tunnel_command_fn (vlib_main_t *vm, unformat_input_t *input,
767 : vlib_cli_command_t *cmd)
768 : {
769 0 : gre_main_t *gm = &gre_main;
770 : gre_tunnel_t *t;
771 0 : u32 ti = ~0;
772 :
773 0 : if (pool_elts (gm->tunnels) == 0)
774 0 : vlib_cli_output (vm, "No GRE tunnels configured...");
775 :
776 0 : while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
777 : {
778 0 : if (unformat (input, "%d", &ti))
779 : ;
780 : else
781 0 : break;
782 : }
783 :
784 0 : if (~0 == ti)
785 : {
786 : /* *INDENT-OFF* */
787 0 : pool_foreach (t, gm->tunnels)
788 : {
789 0 : vlib_cli_output (vm, "%U", format_gre_tunnel, t);
790 : }
791 : /* *INDENT-ON* */
792 : }
793 : else
794 : {
795 0 : t = pool_elt_at_index (gm->tunnels, ti);
796 :
797 0 : vlib_cli_output (vm, "%U", format_gre_tunnel, t);
798 : }
799 :
800 0 : return 0;
801 : }
802 :
803 : /* *INDENT-OFF* */
804 220777 : VLIB_CLI_COMMAND (show_gre_tunnel_command, static) = {
805 : .path = "show gre tunnel",
806 : .function = show_gre_tunnel_command_fn,
807 : };
808 : /* *INDENT-ON* */
809 :
810 : const static teib_vft_t gre_teib_vft = {
811 : .nv_added = gre_teib_entry_added,
812 : .nv_deleted = gre_teib_entry_deleted,
813 : };
814 :
815 : /* force inclusion from application's main.c */
816 : clib_error_t *
817 575 : gre_interface_init (vlib_main_t *vm)
818 : {
819 575 : teib_register (&gre_teib_vft);
820 :
821 575 : return (NULL);
822 : }
823 :
824 1727 : VLIB_INIT_FUNCTION (gre_interface_init);
825 :
826 : /*
827 : * fd.io coding-style-patch-verification: ON
828 : *
829 : * Local Variables:
830 : * eval: (c-set-style "gnu")
831 : * End:
832 : */
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