2 * Copyright (c) 2015 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
15 #include <vnet/vxlan/vxlan.h>
16 #include <vnet/ip/format.h>
17 #include <vnet/fib/fib_entry.h>
18 #include <vnet/fib/fib_table.h>
19 #include <vnet/dpo/receive_dpo.h>
20 #include <vlib/vlib.h>
26 * VXLAN provides the features needed to allow L2 bridge domains (BDs)
27 * to span multiple servers. This is done by building an L2 overlay on
28 * top of an L3 network underlay using VXLAN tunnels.
30 * This makes it possible for servers to be co-located in the same data
31 * center or be separated geographically as long as they are reachable
32 * through the underlay L3 network.
34 * You can refer to this kind of L2 overlay bridge domain as a VXLAN
35 * (Virtual eXtensible VLAN) segment.
39 vxlan_main_t vxlan_main;
41 static u8 * format_decap_next (u8 * s, va_list * args)
43 u32 next_index = va_arg (*args, u32);
47 case VXLAN_INPUT_NEXT_DROP:
48 return format (s, "drop");
49 case VXLAN_INPUT_NEXT_L2_INPUT:
50 return format (s, "l2");
52 return format (s, "index %d", next_index);
57 u8 * format_vxlan_tunnel (u8 * s, va_list * args)
59 vxlan_tunnel_t * t = va_arg (*args, vxlan_tunnel_t *);
60 vxlan_main_t * ngm = &vxlan_main;
62 s = format (s, "[%d] src %U dst %U vni %d sw_if_index %d ",
64 format_ip46_address, &t->src, IP46_TYPE_ANY,
65 format_ip46_address, &t->dst, IP46_TYPE_ANY,
66 t->vni, t->sw_if_index);
68 if (ip46_address_is_multicast (&t->dst))
69 s = format (s, "mcast_sw_if_index %d ", t->mcast_sw_if_index);
71 s = format (s, "encap_fib_index %d fib_entry_index %d decap_next %U\n",
72 t->encap_fib_index, t->fib_entry_index,
73 format_decap_next, t->decap_next_index);
77 static u8 * format_vxlan_name (u8 * s, va_list * args)
79 u32 dev_instance = va_arg (*args, u32);
80 return format (s, "vxlan_tunnel%d", dev_instance);
83 static uword dummy_interface_tx (vlib_main_t * vm,
84 vlib_node_runtime_t * node,
87 clib_warning ("you shouldn't be here, leaking buffers...");
88 return frame->n_vectors;
92 vxlan_interface_admin_up_down (vnet_main_t * vnm, u32 hw_if_index, u32 flags)
94 if (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
95 vnet_hw_interface_set_flags (vnm, hw_if_index, VNET_HW_INTERFACE_FLAG_LINK_UP);
97 vnet_hw_interface_set_flags (vnm, hw_if_index, 0);
99 return /* no error */ 0;
102 VNET_DEVICE_CLASS (vxlan_device_class,static) = {
104 .format_device_name = format_vxlan_name,
105 .format_tx_trace = format_vxlan_encap_trace,
106 .tx_function = dummy_interface_tx,
107 .admin_up_down_function = vxlan_interface_admin_up_down,
110 static u8 * format_vxlan_header_with_length (u8 * s, va_list * args)
112 u32 dev_instance = va_arg (*args, u32);
113 s = format (s, "unimplemented dev %u", dev_instance);
117 VNET_HW_INTERFACE_CLASS (vxlan_hw_class) = {
119 .format_header = format_vxlan_header_with_length,
120 .build_rewrite = default_build_rewrite,
124 vxlan_tunnel_restack_dpo(vxlan_tunnel_t * t)
126 dpo_id_t dpo = DPO_INVALID;
127 u32 encap_index = ip46_address_is_ip4(&t->dst) ?
128 vxlan4_encap_node.index : vxlan6_encap_node.index;
129 fib_forward_chain_type_t forw_type = ip46_address_is_ip4(&t->dst) ?
130 FIB_FORW_CHAIN_TYPE_UNICAST_IP4 : FIB_FORW_CHAIN_TYPE_UNICAST_IP6;
132 fib_entry_contribute_forwarding (t->fib_entry_index, forw_type, &dpo);
133 dpo_stack_from_node (encap_index, &t->next_dpo, &dpo);
137 static vxlan_tunnel_t *
138 vxlan_tunnel_from_fib_node (fib_node_t *node)
141 ASSERT(FIB_NODE_TYPE_VXLAN_TUNNEL == node->fn_type);
143 return ((vxlan_tunnel_t*) (((char*)node) -
144 STRUCT_OFFSET_OF(vxlan_tunnel_t, node)));
148 * Function definition to backwalk a FIB node -
149 * Here we will restack the new dpo of VXLAN DIP to encap node.
151 static fib_node_back_walk_rc_t
152 vxlan_tunnel_back_walk (fib_node_t *node,
153 fib_node_back_walk_ctx_t *ctx)
155 vxlan_tunnel_restack_dpo(vxlan_tunnel_from_fib_node(node));
156 return (FIB_NODE_BACK_WALK_CONTINUE);
160 * Function definition to get a FIB node from its index
163 vxlan_tunnel_fib_node_get (fib_node_index_t index)
166 vxlan_main_t * vxm = &vxlan_main;
168 t = pool_elt_at_index(vxm->tunnels, index);
174 * Function definition to inform the FIB node that its last lock has gone.
177 vxlan_tunnel_last_lock_gone (fib_node_t *node)
180 * The VXLAN tunnel is a root of the graph. As such
181 * it never has children and thus is never locked.
187 * Virtual function table registered by VXLAN tunnels
188 * for participation in the FIB object graph.
190 const static fib_node_vft_t vxlan_vft = {
191 .fnv_get = vxlan_tunnel_fib_node_get,
192 .fnv_last_lock = vxlan_tunnel_last_lock_gone,
193 .fnv_back_walk = vxlan_tunnel_back_walk,
197 #define foreach_copy_field \
199 _(mcast_sw_if_index) \
201 _(decap_next_index) \
205 static int vxlan4_rewrite (vxlan_tunnel_t * t)
209 ip4_vxlan_header_t * h0;
210 int len = sizeof (*h0);
212 vec_validate_aligned (rw, len-1, CLIB_CACHE_LINE_BYTES);
214 h0 = (ip4_vxlan_header_t *) rw;
216 /* Fixed portion of the (outer) ip4 header */
218 ip0->ip_version_and_header_length = 0x45;
220 ip0->protocol = IP_PROTOCOL_UDP;
222 /* we fix up the ip4 header length and checksum after-the-fact */
223 ip0->src_address.as_u32 = t->src.ip4.as_u32;
224 ip0->dst_address.as_u32 = t->dst.ip4.as_u32;
225 ip0->checksum = ip4_header_checksum (ip0);
227 /* UDP header, randomize src port on something, maybe? */
228 h0->udp.src_port = clib_host_to_net_u16 (4789);
229 h0->udp.dst_port = clib_host_to_net_u16 (UDP_DST_PORT_vxlan);
232 vnet_set_vni_and_flags(&h0->vxlan, t->vni);
238 static int vxlan6_rewrite (vxlan_tunnel_t * t)
242 ip6_vxlan_header_t * h0;
243 int len = sizeof (*h0);
245 vec_validate_aligned (rw, len-1, CLIB_CACHE_LINE_BYTES);
247 h0 = (ip6_vxlan_header_t *) rw;
249 /* Fixed portion of the (outer) ip6 header */
251 ip0->ip_version_traffic_class_and_flow_label = clib_host_to_net_u32(6 << 28);
252 ip0->hop_limit = 255;
253 ip0->protocol = IP_PROTOCOL_UDP;
255 ip0->src_address.as_u64[0] = t->src.ip6.as_u64[0];
256 ip0->src_address.as_u64[1] = t->src.ip6.as_u64[1];
257 ip0->dst_address.as_u64[0] = t->dst.ip6.as_u64[0];
258 ip0->dst_address.as_u64[1] = t->dst.ip6.as_u64[1];
260 /* UDP header, randomize src port on something, maybe? */
261 h0->udp.src_port = clib_host_to_net_u16 (4789);
262 h0->udp.dst_port = clib_host_to_net_u16 (UDP_DST_PORT_vxlan);
265 vnet_set_vni_and_flags(&h0->vxlan, t->vni);
271 static int vxlan_check_decap_next(vxlan_main_t * vxm, u32 is_ip6, u32 decap_next_index)
273 vlib_main_t * vm = vxm->vlib_main;
274 vlib_node_runtime_t *r;
278 r = vlib_node_get_runtime (vm, vxlan4_input_node.index);
279 if(decap_next_index >= r->n_next_nodes)
284 r = vlib_node_get_runtime (vm, vxlan6_input_node.index);
285 if(decap_next_index >= r->n_next_nodes)
293 hash_set_key_copy (uword ** h, void * key, uword v) {
294 size_t ksz = hash_header(*h)->user;
295 void * copy = clib_mem_alloc (ksz);
296 clib_memcpy (copy, key, ksz);
297 hash_set_mem (*h, copy, v);
301 hash_unset_key_free (uword ** h, void * key) {
302 hash_pair_t * hp = hash_get_pair_mem (*h, key);
304 key = uword_to_pointer (hp->key, void *);
305 hash_unset_mem (*h, key);
310 vtep_addr_ref(ip46_address_t *ip)
312 uword *vtep = ip46_address_is_ip4(ip) ?
313 hash_get (vxlan_main.vtep4, ip->ip4.as_u32) :
314 hash_get_mem (vxlan_main.vtep6, &ip->ip6);
317 ip46_address_is_ip4(ip) ?
318 hash_set (vxlan_main.vtep4, ip->ip4.as_u32, 1) :
319 hash_set_key_copy (&vxlan_main.vtep6, &ip->ip6, 1);
324 vtep_addr_unref(ip46_address_t *ip)
326 uword *vtep = ip46_address_is_ip4(ip) ?
327 hash_get (vxlan_main.vtep4, ip->ip4.as_u32) :
328 hash_get_mem (vxlan_main.vtep6, &ip->ip6);
332 ip46_address_is_ip4(ip) ?
333 hash_unset (vxlan_main.vtep4, ip->ip4.as_u32) :
334 hash_unset_key_free (&vxlan_main.vtep6, &ip->ip6);
338 typedef CLIB_PACKED(union {
340 fib_node_index_t fib_entry_index;
341 adj_index_t mcast_adj_index;
346 static inline mcast_shared_t
347 mcast_shared_get(ip46_address_t * ip)
349 ASSERT(ip46_address_is_multicast(ip));
350 uword * p = hash_get_mem (vxlan_main.mcast_shared, ip);
352 return (mcast_shared_t) { .as_u64 = *p };
356 ip46_multicast_ethernet_address(u8 * ethernet_address, ip46_address_t * ip) {
357 if (ip46_address_is_ip4(ip))
358 ip4_multicast_ethernet_address(ethernet_address, &ip->ip4);
360 ip6_multicast_ethernet_address(ethernet_address, ip->ip6.as_u32[0]);
363 int vnet_vxlan_add_del_tunnel
364 (vnet_vxlan_add_del_tunnel_args_t *a, u32 * sw_if_indexp)
366 vxlan_main_t * vxm = &vxlan_main;
367 vxlan_tunnel_t *t = 0;
368 vnet_main_t * vnm = vxm->vnet_main;
370 u32 hw_if_index = ~0;
371 u32 sw_if_index = ~0;
373 vxlan4_tunnel_key_t key4;
374 vxlan6_tunnel_key_t key6;
375 u32 is_ip6 = a->is_ip6;
379 key4.src = a->dst.ip4.as_u32; /* decap src in key is encap dst in config */
380 key4.vni = clib_host_to_net_u32 (a->vni << 8);
381 p = hash_get (vxm->vxlan4_tunnel_by_key, key4.as_u64);
385 key6.src.as_u64[0] = a->dst.ip6.as_u64[0];
386 key6.src.as_u64[1] = a->dst.ip6.as_u64[1];
387 key6.vni = clib_host_to_net_u32 (a->vni << 8);
388 p = hash_get_mem (vxm->vxlan6_tunnel_by_key, &key6);
393 l2input_main_t * l2im = &l2input_main;
395 /* adding a tunnel: tunnel must not already exist */
397 return VNET_API_ERROR_TUNNEL_EXIST;
399 /*if not set explicitly, default to l2 */
400 if(a->decap_next_index == ~0)
401 a->decap_next_index = VXLAN_INPUT_NEXT_L2_INPUT;
402 if (vxlan_check_decap_next(vxm, is_ip6, a->decap_next_index))
403 return VNET_API_ERROR_INVALID_DECAP_NEXT;
405 pool_get_aligned (vxm->tunnels, t, CLIB_CACHE_LINE_BYTES);
406 memset (t, 0, sizeof (*t));
408 /* copy from arg structure */
409 #define _(x) t->x = a->x;
414 rv = vxlan4_rewrite (t);
416 rv = vxlan6_rewrite (t);
420 pool_put (vxm->tunnels, t);
426 hash_set_key_copy (&vxm->vxlan6_tunnel_by_key, &key6, t - vxm->tunnels);
428 hash_set (vxm->vxlan4_tunnel_by_key, key4.as_u64, t - vxm->tunnels);
430 vnet_hw_interface_t * hi;
431 if (vec_len (vxm->free_vxlan_tunnel_hw_if_indices) > 0)
433 vnet_interface_main_t * im = &vnm->interface_main;
434 hw_if_index = vxm->free_vxlan_tunnel_hw_if_indices
435 [vec_len (vxm->free_vxlan_tunnel_hw_if_indices)-1];
436 _vec_len (vxm->free_vxlan_tunnel_hw_if_indices) -= 1;
438 hi = vnet_get_hw_interface (vnm, hw_if_index);
439 hi->dev_instance = t - vxm->tunnels;
440 hi->hw_instance = hi->dev_instance;
442 /* clear old stats of freed tunnel before reuse */
443 sw_if_index = hi->sw_if_index;
444 vnet_interface_counter_lock(im);
445 vlib_zero_combined_counter
446 (&im->combined_sw_if_counters[VNET_INTERFACE_COUNTER_TX], sw_if_index);
447 vlib_zero_combined_counter
448 (&im->combined_sw_if_counters[VNET_INTERFACE_COUNTER_RX], sw_if_index);
449 vlib_zero_simple_counter
450 (&im->sw_if_counters[VNET_INTERFACE_COUNTER_DROP], sw_if_index);
451 vnet_interface_counter_unlock(im);
455 hw_if_index = vnet_register_interface
456 (vnm, vxlan_device_class.index, t - vxm->tunnels,
457 vxlan_hw_class.index, t - vxm->tunnels);
458 hi = vnet_get_hw_interface (vnm, hw_if_index);
461 t->hw_if_index = hw_if_index;
462 t->sw_if_index = sw_if_index = hi->sw_if_index;
464 vec_validate_init_empty (vxm->tunnel_index_by_sw_if_index, sw_if_index, ~0);
465 vxm->tunnel_index_by_sw_if_index[sw_if_index] = t - vxm->tunnels;
467 /* setup l2 input config with l2 feature and bd 0 to drop packet */
468 vec_validate (l2im->configs, sw_if_index);
469 l2im->configs[sw_if_index].feature_bitmap = L2INPUT_FEAT_DROP;
470 l2im->configs[sw_if_index].bd_index = 0;
472 vnet_sw_interface_set_flags (vnm, sw_if_index,
473 VNET_SW_INTERFACE_FLAG_ADMIN_UP);
474 fib_node_init(&t->node, FIB_NODE_TYPE_VXLAN_TUNNEL);
475 fib_prefix_t tun_dst_pfx;
476 u32 encap_index = !is_ip6 ?
477 vxlan4_encap_node.index : vxlan6_encap_node.index;
478 vnet_flood_class_t flood_class = VNET_FLOOD_CLASS_TUNNEL_NORMAL;
480 fib_prefix_from_ip46_addr(&t->dst, &tun_dst_pfx);
481 if (!ip46_address_is_multicast(&t->dst))
484 * source the FIB entry for the tunnel's destination
485 * and become a child thereof. The tunnel will then get poked
486 * when the forwarding for the entry updates, and the tunnel can
487 * re-stack accordingly
489 vtep_addr_ref(&t->src);
490 t->fib_entry_index = fib_table_entry_special_add
491 (t->encap_fib_index, &tun_dst_pfx, FIB_SOURCE_RR,
492 FIB_ENTRY_FLAG_NONE, ADJ_INDEX_INVALID);
493 t->sibling_index = fib_entry_child_add
494 (t->fib_entry_index, FIB_NODE_TYPE_VXLAN_TUNNEL, t - vxm->tunnels);
495 vxlan_tunnel_restack_dpo(t);
499 /* Multicast tunnel -
500 * as the same mcast group can be used for mutiple mcast tunnels
501 * with different VNIs, create the output fib adjecency only if
502 * it does not already exist
504 fib_protocol_t fp = (is_ip6) ? FIB_PROTOCOL_IP6 : FIB_PROTOCOL_IP4;
505 dpo_id_t dpo = DPO_INVALID;
506 dpo_proto_t dproto = fib_proto_to_dpo(fp);
508 if (vtep_addr_ref(&t->dst) == 1)
512 ip46_multicast_ethernet_address(mcast_mac, &t->dst);
513 receive_dpo_add_or_lock(dproto, ~0, NULL, &dpo);
514 mcast_shared_t new_ep = {
515 .mcast_adj_index = adj_rewrite_add_and_lock
516 (fp, fib_proto_to_link(fp), a->mcast_sw_if_index, mcast_mac),
517 /* Add VRF local mcast adj. */
518 .fib_entry_index = fib_table_entry_special_dpo_add
519 (t->encap_fib_index, &tun_dst_pfx,
520 FIB_SOURCE_SPECIAL, FIB_ENTRY_FLAG_NONE, &dpo)
522 hash_set_key_copy (&vxm->mcast_shared, &t->dst, new_ep.as_u64);
525 /* Stack shared mcast dst mac addr rewrite on encap */
526 mcast_shared_t ep = mcast_shared_get(&t->dst);
527 dpo_set (&dpo, DPO_ADJACENCY, dproto, ep.mcast_adj_index);
528 dpo_stack_from_node (encap_index, &t->next_dpo, &dpo);
530 flood_class = VNET_FLOOD_CLASS_TUNNEL_MASTER;
533 /* Set vxlan tunnel output node */
534 hi->output_node_index = encap_index;
536 vnet_get_sw_interface (vnet_get_main(), sw_if_index)->flood_class = flood_class;
540 /* deleting a tunnel: tunnel must exist */
542 return VNET_API_ERROR_NO_SUCH_ENTRY;
544 t = pool_elt_at_index (vxm->tunnels, p[0]);
546 vnet_sw_interface_set_flags (vnm, t->sw_if_index, 0 /* down */);
547 /* make sure tunnel is removed from l2 bd or xconnect */
548 set_int_l2_mode(vxm->vlib_main, vnm, MODE_L3, t->sw_if_index, 0, 0, 0, 0);
549 vec_add1 (vxm->free_vxlan_tunnel_hw_if_indices, t->hw_if_index);
551 vxm->tunnel_index_by_sw_if_index[t->sw_if_index] = ~0;
554 hash_unset (vxm->vxlan4_tunnel_by_key, key4.as_u64);
556 hash_unset_key_free (&vxm->vxlan6_tunnel_by_key, &key6);
558 if (!ip46_address_is_multicast(&t->dst))
560 vtep_addr_unref(&t->src);
561 fib_entry_child_remove(t->fib_entry_index, t->sibling_index);
562 fib_table_entry_delete_index(t->fib_entry_index, FIB_SOURCE_RR);
564 else if (vtep_addr_unref(&t->dst) == 0)
566 mcast_shared_t ep = mcast_shared_get(&t->dst);
567 adj_unlock(ep.mcast_adj_index);
568 fib_table_entry_delete_index(ep.fib_entry_index, FIB_SOURCE_SPECIAL);
569 hash_unset_key_free (&vxm->mcast_shared, &t->dst);
572 fib_node_deinit(&t->node);
573 vec_free (t->rewrite);
574 pool_put (vxm->tunnels, t);
578 *sw_if_indexp = sw_if_index;
583 static u32 fib4_index_from_fib_id (u32 fib_id)
585 ip4_main_t * im = &ip4_main;
588 p = hash_get (im->fib_index_by_table_id, fib_id);
595 static u32 fib6_index_from_fib_id (u32 fib_id)
597 ip6_main_t * im = &ip6_main;
600 p = hash_get (im->fib_index_by_table_id, fib_id);
607 static uword get_decap_next_for_node(u32 node_index, u32 ipv4_set)
609 vxlan_main_t * vxm = &vxlan_main;
610 vlib_main_t * vm = vxm->vlib_main;
611 uword next_index = ~0;
615 next_index = vlib_node_add_next (vm, vxlan4_input_node.index, node_index);
619 next_index = vlib_node_add_next (vm, vxlan6_input_node.index, node_index);
625 static uword unformat_decap_next (unformat_input_t * input, va_list * args)
627 u32 * result = va_arg (*args, u32 *);
628 u32 ipv4_set = va_arg (*args, int);
629 vxlan_main_t * vxm = &vxlan_main;
630 vlib_main_t * vm = vxm->vlib_main;
634 if (unformat (input, "l2"))
635 *result = VXLAN_INPUT_NEXT_L2_INPUT;
636 else if (unformat (input, "node %U", unformat_vlib_node, vm, &node_index))
637 *result = get_decap_next_for_node(node_index, ipv4_set);
638 else if (unformat (input, "%d", &tmp))
645 static clib_error_t *
646 vxlan_add_del_tunnel_command_fn (vlib_main_t * vm,
647 unformat_input_t * input,
648 vlib_cli_command_t * cmd)
650 unformat_input_t _line_input, * line_input = &_line_input;
651 ip46_address_t src , dst;
658 u32 encap_fib_index = 0;
659 u32 mcast_sw_if_index = ~0;
660 u32 decap_next_index = VXLAN_INPUT_NEXT_L2_INPUT;
664 vnet_vxlan_add_del_tunnel_args_t _a, * a = &_a;
665 u32 tunnel_sw_if_index;
667 /* Cant "universally zero init" (={0}) due to GCC bug 53119 */
668 memset(&src, 0, sizeof src);
669 memset(&dst, 0, sizeof dst);
671 /* Get a line of input. */
672 if (! unformat_user (input, unformat_line_input, line_input))
675 while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT) {
676 if (unformat (line_input, "del"))
680 else if (unformat (line_input, "src %U",
681 unformat_ip4_address, &src.ip4))
686 else if (unformat (line_input, "dst %U",
687 unformat_ip4_address, &dst.ip4))
692 else if (unformat (line_input, "src %U",
693 unformat_ip6_address, &src.ip6))
698 else if (unformat (line_input, "dst %U",
699 unformat_ip6_address, &dst.ip6))
704 else if (unformat (line_input, "group %U %U",
705 unformat_ip4_address, &dst.ip4,
706 unformat_vnet_sw_interface,
707 vnet_get_main(), &mcast_sw_if_index))
709 grp_set = dst_set = 1;
712 else if (unformat (line_input, "group %U %U",
713 unformat_ip6_address, &dst.ip6,
714 unformat_vnet_sw_interface,
715 vnet_get_main(), &mcast_sw_if_index))
717 grp_set = dst_set = 1;
720 else if (unformat (line_input, "encap-vrf-id %d", &tmp))
723 encap_fib_index = fib6_index_from_fib_id (tmp);
725 encap_fib_index = fib4_index_from_fib_id (tmp);
726 if (encap_fib_index == ~0)
727 return clib_error_return (0, "nonexistent encap-vrf-id %d", tmp);
729 else if (unformat (line_input, "decap-next %U", unformat_decap_next,
730 &decap_next_index, ipv4_set))
732 else if (unformat (line_input, "vni %d", &vni))
735 return clib_error_return (0, "vni %d out of range", vni);
738 return clib_error_return (0, "parse error: '%U'",
739 format_unformat_error, line_input);
742 unformat_free (line_input);
745 return clib_error_return (0, "tunnel src address not specified");
748 return clib_error_return (0, "tunnel dst address not specified");
750 if (grp_set && !ip46_address_is_multicast(&dst))
751 return clib_error_return (0, "tunnel group address not multicast");
753 if (grp_set == 0 && ip46_address_is_multicast(&dst))
754 return clib_error_return (0, "dst address must be unicast");
756 if (grp_set && mcast_sw_if_index == ~0)
757 return clib_error_return (0, "tunnel nonexistent multicast device");
759 if (ipv4_set && ipv6_set)
760 return clib_error_return (0, "both IPv4 and IPv6 addresses specified");
762 if (ip46_address_cmp(&src, &dst) == 0)
763 return clib_error_return (0, "src and dst addresses are identical");
765 if (decap_next_index == ~0)
766 return clib_error_return (0, "next node not found");
769 return clib_error_return (0, "vni not specified");
771 memset (a, 0, sizeof (*a));
774 a->is_ip6 = ipv6_set;
776 #define _(x) a->x = x;
780 rv = vnet_vxlan_add_del_tunnel (a, &tunnel_sw_if_index);
786 vlib_cli_output(vm, "%U\n", format_vnet_sw_if_index_name,
787 vnet_get_main(), tunnel_sw_if_index);
790 case VNET_API_ERROR_TUNNEL_EXIST:
791 return clib_error_return (0, "tunnel already exists...");
793 case VNET_API_ERROR_NO_SUCH_ENTRY:
794 return clib_error_return (0, "tunnel does not exist...");
797 return clib_error_return
798 (0, "vnet_vxlan_add_del_tunnel returned %d", rv);
805 * Add or delete a VXLAN Tunnel.
807 * VXLAN provides the features needed to allow L2 bridge domains (BDs)
808 * to span multiple servers. This is done by building an L2 overlay on
809 * top of an L3 network underlay using VXLAN tunnels.
811 * This makes it possible for servers to be co-located in the same data
812 * center or be separated geographically as long as they are reachable
813 * through the underlay L3 network.
815 * You can refer to this kind of L2 overlay bridge domain as a VXLAN
816 * (Virtual eXtensible VLAN) segment.
819 * Example of how to create a VXLAN Tunnel:
820 * @cliexcmd{create vxlan tunnel src 10.0.3.1 dst 10.0.3.3 vni 13 encap-vrf-id 7}
821 * Example of how to delete a VXLAN Tunnel:
822 * @cliexcmd{create vxlan tunnel src 10.0.3.1 dst 10.0.3.3 vni 13 del}
825 VLIB_CLI_COMMAND (create_vxlan_tunnel_command, static) = {
826 .path = "create vxlan tunnel",
828 "create vxlan tunnel src <local-vtep-addr>"
829 " {dst <remote-vtep-addr>|group <mcast-vtep-addr> <intf-name>} vni <nn>"
830 " [encap-vrf-id <nn>] [decap-next [l2|node <name>]] [del]",
831 .function = vxlan_add_del_tunnel_command_fn,
835 static clib_error_t *
836 show_vxlan_tunnel_command_fn (vlib_main_t * vm,
837 unformat_input_t * input,
838 vlib_cli_command_t * cmd)
840 vxlan_main_t * vxm = &vxlan_main;
843 if (pool_elts (vxm->tunnels) == 0)
844 vlib_cli_output (vm, "No vxlan tunnels configured...");
846 pool_foreach (t, vxm->tunnels,
848 vlib_cli_output (vm, "%U", format_vxlan_tunnel, t);
855 * Display all the VXLAN Tunnel entries.
858 * Example of how to display the VXLAN Tunnel entries:
859 * @cliexstart{show vxlan tunnel}
860 * [0] src 10.0.3.1 dst 10.0.3.3 vni 13 encap_fib_index 0 sw_if_index 5 decap_next l2
864 VLIB_CLI_COMMAND (show_vxlan_tunnel_command, static) = {
865 .path = "show vxlan tunnel",
866 .short_help = "show vxlan tunnel",
867 .function = show_vxlan_tunnel_command_fn,
872 clib_error_t *vxlan_init (vlib_main_t *vm)
874 vxlan_main_t * vxm = &vxlan_main;
876 vxm->vnet_main = vnet_get_main();
879 /* initialize the ip6 hash */
880 vxm->vxlan6_tunnel_by_key = hash_create_mem(0,
881 sizeof(vxlan6_tunnel_key_t),
883 vxm->vtep6 = hash_create_mem(0,
884 sizeof(ip6_address_t),
886 vxm->mcast_shared = hash_create_mem(0,
887 sizeof(ip46_address_t),
888 sizeof(mcast_shared_t));
890 udp_register_dst_port (vm, UDP_DST_PORT_vxlan,
891 vxlan4_input_node.index, /* is_ip4 */ 1);
892 udp_register_dst_port (vm, UDP_DST_PORT_vxlan6,
893 vxlan6_input_node.index, /* is_ip4 */ 0);
895 fib_node_register_type(FIB_NODE_TYPE_VXLAN_TUNNEL, &vxlan_vft);
900 VLIB_INIT_FUNCTION(vxlan_init);