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.
17 * @brief Common utility functions for IPv4 and IPv6 VXLAN GPE tunnels
20 #include <vnet/vxlan-gpe/vxlan_gpe.h>
21 #include <vnet/fib/fib.h>
22 #include <vnet/ip/format.h>
23 #include <vnet/fib/fib_entry.h>
24 #include <vnet/fib/fib_table.h>
25 #include <vnet/mfib/mfib_table.h>
26 #include <vnet/adj/adj_mcast.h>
27 #include <vnet/interface.h>
28 #include <vlib/vlib.h>
34 * VXLAN-GPE provides the features needed to allow L2 bridge domains (BDs)
35 * to span multiple servers. This is done by building an L2 overlay on
36 * top of an L3 network underlay using VXLAN-GPE tunnels.
38 * This makes it possible for servers to be co-located in the same data
39 * center or be separated geographically as long as they are reachable
40 * through the underlay L3 network.
42 * You can refer to this kind of L2 overlay bridge domain as a VXLAN-GPE segment.
45 vxlan_gpe_main_t vxlan_gpe_main;
48 format_decap_next (u8 * s, va_list * args)
50 vxlan_gpe_tunnel_t *t = va_arg (*args, vxlan_gpe_tunnel_t *);
54 case VXLAN_GPE_PROTOCOL_IP4:
55 s = format (s, "protocol ip4 fib-idx %d", t->decap_fib_index);
57 case VXLAN_GPE_PROTOCOL_IP6:
58 s = format (s, "protocol ip6 fib-idx %d", t->decap_fib_index);
60 case VXLAN_GPE_PROTOCOL_ETHERNET:
61 s = format (s, "protocol ethernet");
63 case VXLAN_GPE_PROTOCOL_NSH:
64 s = format (s, "protocol nsh");
67 s = format (s, "protocol unknown %d", t->protocol);
74 * @brief Format function for VXLAN GPE tunnel
76 * @param *s formatting string
79 * @return *s formatted string
83 format_vxlan_gpe_tunnel (u8 * s, va_list * args)
85 vxlan_gpe_tunnel_t *t = va_arg (*args, vxlan_gpe_tunnel_t *);
86 vxlan_gpe_main_t *ngm = &vxlan_gpe_main;
88 s = format (s, "[%d] lcl %U rmt %U vni %d fib-idx %d sw-if-idx %d ",
90 format_ip46_address, &t->local, IP46_TYPE_ANY,
91 format_ip46_address, &t->remote, IP46_TYPE_ANY,
92 t->vni, t->encap_fib_index, t->sw_if_index);
95 /* next_dpo not yet used by vxlan-gpe-encap node */
96 s = format (s, "encap-dpo-idx %d ", t->next_dpo.dpoi_index);
99 s = format (s, "decap-next-%U ", format_decap_next, t);
101 if (PREDICT_FALSE (ip46_address_is_multicast (&t->remote)))
102 s = format (s, "mcast-sw-if-idx %d ", t->mcast_sw_if_index);
108 * @brief Naming for VXLAN GPE tunnel
110 * @param *s formatting string
113 * @return *s formatted string
117 format_vxlan_gpe_name (u8 * s, va_list * args)
119 u32 dev_instance = va_arg (*args, u32);
120 return format (s, "vxlan_gpe_tunnel%d", dev_instance);
124 * @brief CLI function for VXLAN GPE admin up/down
133 static clib_error_t *
134 vxlan_gpe_interface_admin_up_down (vnet_main_t * vnm, u32 hw_if_index,
137 u32 hw_flags = (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) ?
138 VNET_HW_INTERFACE_FLAG_LINK_UP : 0;
139 vnet_hw_interface_set_flags (vnm, hw_if_index, hw_flags);
145 VNET_DEVICE_CLASS (vxlan_gpe_device_class,static) = {
147 .format_device_name = format_vxlan_gpe_name,
148 .format_tx_trace = format_vxlan_gpe_encap_trace,
149 .admin_up_down_function = vxlan_gpe_interface_admin_up_down,
155 * @brief Formatting function for tracing VXLAN GPE with length
164 format_vxlan_gpe_header_with_length (u8 * s, va_list * args)
166 u32 dev_instance = va_arg (*args, u32);
167 s = format (s, "unimplemented dev %u", dev_instance);
172 VNET_HW_INTERFACE_CLASS (vxlan_gpe_hw_class) = {
174 .format_header = format_vxlan_gpe_header_with_length,
175 .build_rewrite = default_build_rewrite,
180 vxlan_gpe_tunnel_restack_dpo (vxlan_gpe_tunnel_t * t)
182 dpo_id_t dpo = DPO_INVALID;
183 u32 encap_index = vxlan_gpe_encap_node.index;
184 fib_forward_chain_type_t forw_type = ip46_address_is_ip4 (&t->remote) ?
185 FIB_FORW_CHAIN_TYPE_UNICAST_IP4 : FIB_FORW_CHAIN_TYPE_UNICAST_IP6;
187 fib_entry_contribute_forwarding (t->fib_entry_index, forw_type, &dpo);
188 dpo_stack_from_node (encap_index, &t->next_dpo, &dpo);
192 static vxlan_gpe_tunnel_t *
193 vxlan_gpe_tunnel_from_fib_node (fib_node_t * node)
195 ASSERT (FIB_NODE_TYPE_VXLAN_GPE_TUNNEL == node->fn_type);
196 return ((vxlan_gpe_tunnel_t *) (((char *) node) -
197 STRUCT_OFFSET_OF (vxlan_gpe_tunnel_t,
202 * Function definition to backwalk a FIB node -
203 * Here we will restack the new dpo of VXLAN_GPE DIP to encap node.
205 static fib_node_back_walk_rc_t
206 vxlan_gpe_tunnel_back_walk (fib_node_t * node, fib_node_back_walk_ctx_t * ctx)
208 vxlan_gpe_tunnel_restack_dpo (vxlan_gpe_tunnel_from_fib_node (node));
209 return (FIB_NODE_BACK_WALK_CONTINUE);
213 * Function definition to get a FIB node from its index
216 vxlan_gpe_tunnel_fib_node_get (fib_node_index_t index)
218 vxlan_gpe_tunnel_t *t;
219 vxlan_gpe_main_t *ngm = &vxlan_gpe_main;
221 t = pool_elt_at_index (ngm->tunnels, index);
227 * Function definition to inform the FIB node that its last lock has gone.
230 vxlan_gpe_tunnel_last_lock_gone (fib_node_t * node)
233 * The VXLAN_GPE tunnel is a root of the graph. As such
234 * it never has children and thus is never locked.
240 * Virtual function table registered by VXLAN_GPE tunnels
241 * for participation in the FIB object graph.
243 const static fib_node_vft_t vxlan_gpe_vft = {
244 .fnv_get = vxlan_gpe_tunnel_fib_node_get,
245 .fnv_last_lock = vxlan_gpe_tunnel_last_lock_gone,
246 .fnv_back_walk = vxlan_gpe_tunnel_back_walk,
249 #define foreach_gpe_copy_field \
252 _(mcast_sw_if_index) \
256 #define foreach_copy_ipv4 { \
257 _(local.ip4.as_u32) \
258 _(remote.ip4.as_u32) \
261 #define foreach_copy_ipv6 { \
262 _(local.ip6.as_u64[0]) \
263 _(local.ip6.as_u64[1]) \
264 _(remote.ip6.as_u64[0]) \
265 _(remote.ip6.as_u64[1]) \
270 * @brief Calculate IPv4 VXLAN GPE rewrite header
278 vxlan4_gpe_rewrite (vxlan_gpe_tunnel_t * t, u32 extension_size,
279 u8 protocol_override, uword encap_next_node)
283 ip4_vxlan_gpe_header_t *h0;
286 len = sizeof (*h0) + extension_size;
288 vec_free (t->rewrite);
289 vec_validate_aligned (rw, len - 1, CLIB_CACHE_LINE_BYTES);
291 h0 = (ip4_vxlan_gpe_header_t *) rw;
293 /* Fixed portion of the (outer) ip4 header */
295 ip0->ip_version_and_header_length = 0x45;
297 ip0->protocol = IP_PROTOCOL_UDP;
299 /* we fix up the ip4 header length and checksum after-the-fact */
300 ip0->src_address.as_u32 = t->local.ip4.as_u32;
301 ip0->dst_address.as_u32 = t->remote.ip4.as_u32;
302 ip0->checksum = ip4_header_checksum (ip0);
304 /* UDP header, randomize src port on something, maybe? */
305 h0->udp.src_port = clib_host_to_net_u16 (4790);
306 h0->udp.dst_port = clib_host_to_net_u16 (UDP_DST_PORT_VXLAN_GPE);
308 /* VXLAN header. Are we having fun yet? */
309 h0->vxlan.flags = VXLAN_GPE_FLAGS_I | VXLAN_GPE_FLAGS_P;
310 h0->vxlan.ver_res = VXLAN_GPE_VERSION;
311 if (protocol_override)
313 h0->vxlan.protocol = protocol_override;
317 h0->vxlan.protocol = t->protocol;
319 t->rewrite_size = sizeof (ip4_vxlan_gpe_header_t) + extension_size;
320 h0->vxlan.vni_res = clib_host_to_net_u32 (t->vni << 8);
323 t->encap_next_node = encap_next_node;
328 * @brief Calculate IPv6 VXLAN GPE rewrite header
336 vxlan6_gpe_rewrite (vxlan_gpe_tunnel_t * t, u32 extension_size,
337 u8 protocol_override, uword encap_next_node)
341 ip6_vxlan_gpe_header_t *h0;
344 len = sizeof (*h0) + extension_size;
346 vec_free (t->rewrite);
347 vec_validate_aligned (rw, len - 1, CLIB_CACHE_LINE_BYTES);
349 h0 = (ip6_vxlan_gpe_header_t *) rw;
351 /* Fixed portion of the (outer) ip4 header */
353 ip0->ip_version_traffic_class_and_flow_label =
354 clib_host_to_net_u32 (6 << 28);
355 ip0->hop_limit = 255;
356 ip0->protocol = IP_PROTOCOL_UDP;
358 ip0->src_address.as_u64[0] = t->local.ip6.as_u64[0];
359 ip0->src_address.as_u64[1] = t->local.ip6.as_u64[1];
360 ip0->dst_address.as_u64[0] = t->remote.ip6.as_u64[0];
361 ip0->dst_address.as_u64[1] = t->remote.ip6.as_u64[1];
363 /* UDP header, randomize src port on something, maybe? */
364 h0->udp.src_port = clib_host_to_net_u16 (4790);
365 h0->udp.dst_port = clib_host_to_net_u16 (UDP_DST_PORT_VXLAN_GPE);
367 /* VXLAN header. Are we having fun yet? */
368 h0->vxlan.flags = VXLAN_GPE_FLAGS_I | VXLAN_GPE_FLAGS_P;
369 h0->vxlan.ver_res = VXLAN_GPE_VERSION;
370 if (protocol_override)
372 h0->vxlan.protocol = t->protocol;
376 h0->vxlan.protocol = protocol_override;
378 t->rewrite_size = sizeof (ip4_vxlan_gpe_header_t) + extension_size;
379 h0->vxlan.vni_res = clib_host_to_net_u32 (t->vni << 8);
382 t->encap_next_node = encap_next_node;
387 vtep_addr_ref (ip46_address_t * ip)
389 uword *vtep = ip46_address_is_ip4 (ip) ?
390 hash_get (vxlan_gpe_main.vtep4, ip->ip4.as_u32) :
391 hash_get_mem (vxlan_gpe_main.vtep6, &ip->ip6);
394 ip46_address_is_ip4 (ip) ?
395 hash_set (vxlan_gpe_main.vtep4, ip->ip4.as_u32, 1) :
396 hash_set_mem_alloc (&vxlan_gpe_main.vtep6, &ip->ip6, 1);
401 vtep_addr_unref (ip46_address_t * ip)
403 uword *vtep = ip46_address_is_ip4 (ip) ?
404 hash_get (vxlan_gpe_main.vtep4, ip->ip4.as_u32) :
405 hash_get_mem (vxlan_gpe_main.vtep6, &ip->ip6);
409 ip46_address_is_ip4 (ip) ?
410 hash_unset (vxlan_gpe_main.vtep4, ip->ip4.as_u32) :
411 hash_unset_mem_free (&vxlan_gpe_main.vtep6, &ip->ip6);
416 typedef CLIB_PACKED(union {
418 fib_node_index_t mfib_entry_index;
419 adj_index_t mcast_adj_index;
425 static inline mcast_shared_t
426 mcast_shared_get (ip46_address_t * ip)
428 ASSERT (ip46_address_is_multicast (ip));
429 uword *p = hash_get_mem (vxlan_gpe_main.mcast_shared, ip);
431 return (mcast_shared_t)
437 mcast_shared_add (ip46_address_t * remote,
438 fib_node_index_t mfei, adj_index_t ai)
440 mcast_shared_t new_ep = {
441 .mcast_adj_index = ai,
442 .mfib_entry_index = mfei,
445 hash_set_mem_alloc (&vxlan_gpe_main.mcast_shared, remote, new_ep.as_u64);
449 mcast_shared_remove (ip46_address_t * remote)
451 mcast_shared_t ep = mcast_shared_get (remote);
453 adj_unlock (ep.mcast_adj_index);
454 mfib_table_entry_delete_index (ep.mfib_entry_index, MFIB_SOURCE_VXLAN_GPE);
456 hash_unset_mem_free (&vxlan_gpe_main.mcast_shared, remote);
460 * @brief Add or Del a VXLAN GPE tunnel
463 * @param *sw_if_index
468 int vnet_vxlan_gpe_add_del_tunnel
469 (vnet_vxlan_gpe_add_del_tunnel_args_t * a, u32 * sw_if_indexp)
471 vxlan_gpe_main_t *ngm = &vxlan_gpe_main;
472 vxlan_gpe_tunnel_t *t = 0;
473 vnet_main_t *vnm = ngm->vnet_main;
474 vnet_hw_interface_t *hi;
476 u32 hw_if_index = ~0;
477 u32 sw_if_index = ~0;
479 vxlan4_gpe_tunnel_key_t key4, *key4_copy;
480 vxlan6_gpe_tunnel_key_t key6, *key6_copy;
481 u32 is_ip6 = a->is_ip6;
485 key4.local = a->local.ip4.as_u32;
486 key4.remote = a->remote.ip4.as_u32;
487 key4.vni = clib_host_to_net_u32 (a->vni << 8);
490 p = hash_get_mem (ngm->vxlan4_gpe_tunnel_by_key, &key4);
494 key6.local.as_u64[0] = a->local.ip6.as_u64[0];
495 key6.local.as_u64[1] = a->local.ip6.as_u64[1];
496 key6.remote.as_u64[0] = a->remote.ip6.as_u64[0];
497 key6.remote.as_u64[1] = a->remote.ip6.as_u64[1];
498 key6.vni = clib_host_to_net_u32 (a->vni << 8);
500 p = hash_get_mem (ngm->vxlan6_gpe_tunnel_by_key, &key6);
505 l2input_main_t *l2im = &l2input_main;
507 /* adding a tunnel: tunnel must not already exist */
509 return VNET_API_ERROR_TUNNEL_EXIST;
511 pool_get_aligned (ngm->tunnels, t, CLIB_CACHE_LINE_BYTES);
512 clib_memset (t, 0, sizeof (*t));
514 /* copy from arg structure */
516 #define _(x) t->x = a->x;
517 foreach_gpe_copy_field;
526 t->flags |= VXLAN_GPE_TUNNEL_IS_IPV4;
530 rv = vxlan4_gpe_rewrite (t, 0, 0, VXLAN_GPE_ENCAP_NEXT_IP4_LOOKUP);
534 rv = vxlan6_gpe_rewrite (t, 0, 0, VXLAN_GPE_ENCAP_NEXT_IP6_LOOKUP);
539 pool_put (ngm->tunnels, t);
545 key4_copy = clib_mem_alloc (sizeof (*key4_copy));
546 clib_memcpy_fast (key4_copy, &key4, sizeof (*key4_copy));
547 hash_set_mem (ngm->vxlan4_gpe_tunnel_by_key, key4_copy,
552 key6_copy = clib_mem_alloc (sizeof (*key6_copy));
553 clib_memcpy_fast (key6_copy, &key6, sizeof (*key6_copy));
554 hash_set_mem (ngm->vxlan6_gpe_tunnel_by_key, key6_copy,
558 if (vec_len (ngm->free_vxlan_gpe_tunnel_hw_if_indices) > 0)
560 vnet_interface_main_t *im = &vnm->interface_main;
561 hw_if_index = ngm->free_vxlan_gpe_tunnel_hw_if_indices
562 [vec_len (ngm->free_vxlan_gpe_tunnel_hw_if_indices) - 1];
563 _vec_len (ngm->free_vxlan_gpe_tunnel_hw_if_indices) -= 1;
565 hi = vnet_get_hw_interface (vnm, hw_if_index);
566 hi->dev_instance = t - ngm->tunnels;
567 hi->hw_instance = hi->dev_instance;
568 /* clear old stats of freed tunnel before reuse */
569 sw_if_index = hi->sw_if_index;
570 vnet_interface_counter_lock (im);
571 vlib_zero_combined_counter
572 (&im->combined_sw_if_counters[VNET_INTERFACE_COUNTER_TX],
574 vlib_zero_combined_counter (&im->combined_sw_if_counters
575 [VNET_INTERFACE_COUNTER_RX],
577 vlib_zero_simple_counter (&im->sw_if_counters
578 [VNET_INTERFACE_COUNTER_DROP],
580 vnet_interface_counter_unlock (im);
584 hw_if_index = vnet_register_interface
585 (vnm, vxlan_gpe_device_class.index, t - ngm->tunnels,
586 vxlan_gpe_hw_class.index, t - ngm->tunnels);
587 hi = vnet_get_hw_interface (vnm, hw_if_index);
590 /* Set vxlan-gpe tunnel output node */
591 u32 encap_index = vxlan_gpe_encap_node.index;
592 vnet_set_interface_output_node (vnm, hw_if_index, encap_index);
594 t->hw_if_index = hw_if_index;
595 t->sw_if_index = sw_if_index = hi->sw_if_index;
596 vec_validate_init_empty (ngm->tunnel_index_by_sw_if_index, sw_if_index,
598 ngm->tunnel_index_by_sw_if_index[sw_if_index] = t - ngm->tunnels;
600 /* setup l2 input config with l2 feature and bd 0 to drop packet */
601 vec_validate (l2im->configs, sw_if_index);
602 l2im->configs[sw_if_index].feature_bitmap = L2INPUT_FEAT_DROP;
603 l2im->configs[sw_if_index].bd_index = 0;
605 vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, sw_if_index);
606 si->flags &= ~VNET_SW_INTERFACE_FLAG_HIDDEN;
607 vnet_sw_interface_set_flags (vnm, hi->sw_if_index,
608 VNET_SW_INTERFACE_FLAG_ADMIN_UP);
609 fib_node_init (&t->node, FIB_NODE_TYPE_VXLAN_GPE_TUNNEL);
610 fib_prefix_t tun_remote_pfx;
611 vnet_flood_class_t flood_class = VNET_FLOOD_CLASS_TUNNEL_NORMAL;
613 fib_prefix_from_ip46_addr (&t->remote, &tun_remote_pfx);
614 if (!ip46_address_is_multicast (&t->remote))
617 * source the FIB entry for the tunnel's destination
618 * and become a child thereof. The tunnel will then get poked
619 * when the forwarding for the entry updates, and the tunnel can
620 * re-stack accordingly
622 vtep_addr_ref (&t->local);
623 t->fib_entry_index = fib_table_entry_special_add
624 (t->encap_fib_index, &tun_remote_pfx, FIB_SOURCE_RR,
625 FIB_ENTRY_FLAG_NONE);
626 t->sibling_index = fib_entry_child_add
627 (t->fib_entry_index, FIB_NODE_TYPE_VXLAN_GPE_TUNNEL,
629 vxlan_gpe_tunnel_restack_dpo (t);
633 /* Multicast tunnel -
634 * as the same mcast group can be used for multiple mcast tunnels
635 * with different VNIs, create the output fib adjacency only if
636 * it does not already exist
638 fib_protocol_t fp = fib_ip_proto (is_ip6);
640 if (vtep_addr_ref (&t->remote) == 1)
642 fib_node_index_t mfei;
644 fib_route_path_t path = {
645 .frp_proto = fib_proto_to_dpo (fp),
646 .frp_addr = zero_addr,
647 .frp_sw_if_index = 0xffffffff,
650 .frp_flags = FIB_ROUTE_PATH_LOCAL,
651 .frp_mitf_flags = MFIB_ITF_FLAG_FORWARD,
653 const mfib_prefix_t mpfx = {
655 .fp_len = (is_ip6 ? 128 : 32),
656 .fp_grp_addr = tun_remote_pfx.fp_addr,
660 * Setup the (*,G) to receive traffic on the mcast group
661 * - the forwarding interface is for-us
662 * - the accepting interface is that from the API
664 mfib_table_entry_path_update (t->encap_fib_index,
666 MFIB_SOURCE_VXLAN_GPE, &path);
668 path.frp_sw_if_index = a->mcast_sw_if_index;
669 path.frp_flags = FIB_ROUTE_PATH_FLAG_NONE;
670 path.frp_mitf_flags = MFIB_ITF_FLAG_ACCEPT;
671 mfei = mfib_table_entry_path_update (t->encap_fib_index,
673 MFIB_SOURCE_VXLAN_GPE,
677 * Create the mcast adjacency to send traffic to the group
679 ai = adj_mcast_add_or_lock (fp,
680 fib_proto_to_link (fp),
681 a->mcast_sw_if_index);
684 * create a new end-point
686 mcast_shared_add (&t->remote, mfei, ai);
689 dpo_id_t dpo = DPO_INVALID;
690 mcast_shared_t ep = mcast_shared_get (&t->remote);
692 /* Stack shared mcast remote mac addr rewrite on encap */
693 dpo_set (&dpo, DPO_ADJACENCY_MCAST,
694 fib_proto_to_dpo (fp), ep.mcast_adj_index);
696 dpo_stack_from_node (encap_index, &t->next_dpo, &dpo);
698 flood_class = VNET_FLOOD_CLASS_TUNNEL_MASTER;
701 vnet_get_sw_interface (vnet_get_main (), sw_if_index)->flood_class =
706 /* deleting a tunnel: tunnel must exist */
708 return VNET_API_ERROR_NO_SUCH_ENTRY;
710 t = pool_elt_at_index (ngm->tunnels, p[0]);
712 sw_if_index = t->sw_if_index;
713 vnet_sw_interface_set_flags (vnm, t->sw_if_index, 0 /* down */ );
714 vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, t->sw_if_index);
715 si->flags |= VNET_SW_INTERFACE_FLAG_HIDDEN;
716 set_int_l2_mode (ngm->vlib_main, vnm, MODE_L3, t->sw_if_index, 0,
717 L2_BD_PORT_TYPE_NORMAL, 0, 0);
718 vec_add1 (ngm->free_vxlan_gpe_tunnel_hw_if_indices, t->hw_if_index);
720 ngm->tunnel_index_by_sw_if_index[t->sw_if_index] = ~0;
723 hash_unset (ngm->vxlan4_gpe_tunnel_by_key, key4.as_u64);
725 hash_unset_mem_free (&ngm->vxlan6_gpe_tunnel_by_key, &key6);
727 if (!ip46_address_is_multicast (&t->remote))
729 vtep_addr_unref (&t->local);
730 fib_entry_child_remove (t->fib_entry_index, t->sibling_index);
731 fib_table_entry_delete_index (t->fib_entry_index, FIB_SOURCE_RR);
733 else if (vtep_addr_unref (&t->remote) == 0)
735 mcast_shared_remove (&t->remote);
738 fib_node_deinit (&t->node);
739 vec_free (t->rewrite);
740 pool_put (ngm->tunnels, t);
744 *sw_if_indexp = sw_if_index;
748 /* register udp ports */
749 if (!is_ip6 && !udp_is_valid_dst_port (UDP_DST_PORT_VXLAN_GPE, 1))
750 udp_register_dst_port (ngm->vlib_main, UDP_DST_PORT_VXLAN_GPE,
751 vxlan4_gpe_input_node.index, 1 /* is_ip4 */ );
752 if (is_ip6 && !udp_is_valid_dst_port (UDP_DST_PORT_VXLAN6_GPE, 0))
753 udp_register_dst_port (ngm->vlib_main, UDP_DST_PORT_VXLAN6_GPE,
754 vxlan6_gpe_input_node.index, 0 /* is_ip4 */ );
760 static clib_error_t *
761 vxlan_gpe_add_del_tunnel_command_fn (vlib_main_t * vm,
762 unformat_input_t * input,
763 vlib_cli_command_t * cmd)
765 unformat_input_t _line_input, *line_input = &_line_input;
767 ip46_address_t local, remote;
773 u32 mcast_sw_if_index = ~0;
774 u32 encap_fib_index = 0;
775 u32 decap_fib_index = 0;
776 u8 protocol = VXLAN_GPE_PROTOCOL_IP4;
781 vnet_vxlan_gpe_add_del_tunnel_args_t _a, *a = &_a;
783 clib_error_t *error = NULL;
785 /* Get a line of input. */
786 if (!unformat_user (input, unformat_line_input, line_input))
789 while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
791 if (unformat (line_input, "del"))
793 else if (unformat (line_input, "local %U",
794 unformat_ip4_address, &local.ip4))
799 else if (unformat (line_input, "remote %U",
800 unformat_ip4_address, &remote.ip4))
805 else if (unformat (line_input, "local %U",
806 unformat_ip6_address, &local.ip6))
811 else if (unformat (line_input, "remote %U",
812 unformat_ip6_address, &remote.ip6))
817 else if (unformat (line_input, "group %U %U",
818 unformat_ip4_address, &remote.ip4,
819 unformat_vnet_sw_interface,
820 vnet_get_main (), &mcast_sw_if_index))
822 grp_set = remote_set = 1;
825 else if (unformat (line_input, "group %U %U",
826 unformat_ip6_address, &remote.ip6,
827 unformat_vnet_sw_interface,
828 vnet_get_main (), &mcast_sw_if_index))
830 grp_set = remote_set = 1;
833 else if (unformat (line_input, "encap-vrf-id %d", &tmp))
836 encap_fib_index = fib_table_find (FIB_PROTOCOL_IP6, tmp);
838 encap_fib_index = fib_table_find (FIB_PROTOCOL_IP4, tmp);
840 if (encap_fib_index == ~0)
843 clib_error_return (0, "nonexistent encap fib id %d", tmp);
847 else if (unformat (line_input, "decap-vrf-id %d", &tmp))
850 decap_fib_index = fib_table_find (FIB_PROTOCOL_IP6, tmp);
852 decap_fib_index = fib_table_find (FIB_PROTOCOL_IP4, tmp);
854 if (decap_fib_index == ~0)
857 clib_error_return (0, "nonexistent decap fib id %d", tmp);
861 else if (unformat (line_input, "vni %d", &vni))
863 else if (unformat (line_input, "next-ip4"))
864 protocol = VXLAN_GPE_PROTOCOL_IP4;
865 else if (unformat (line_input, "next-ip6"))
866 protocol = VXLAN_GPE_PROTOCOL_IP6;
867 else if (unformat (line_input, "next-ethernet"))
868 protocol = VXLAN_GPE_PROTOCOL_ETHERNET;
869 else if (unformat (line_input, "next-nsh"))
870 protocol = VXLAN_GPE_PROTOCOL_NSH;
873 error = clib_error_return (0, "parse error: '%U'",
874 format_unformat_error, line_input);
881 error = clib_error_return (0, "tunnel local address not specified");
887 error = clib_error_return (0, "tunnel remote address not specified");
891 if (grp_set && !ip46_address_is_multicast (&remote))
893 error = clib_error_return (0, "tunnel group address not multicast");
897 if (grp_set == 0 && ip46_address_is_multicast (&remote))
899 error = clib_error_return (0, "remote address must be unicast");
903 if (grp_set && mcast_sw_if_index == ~0)
905 error = clib_error_return (0, "tunnel nonexistent multicast device");
908 if (ipv4_set && ipv6_set)
910 error = clib_error_return (0, "both IPv4 and IPv6 addresses specified");
914 if ((ipv4_set && memcmp (&local.ip4, &remote.ip4, sizeof (local.ip4)) == 0)
916 && memcmp (&local.ip6, &remote.ip6, sizeof (local.ip6)) == 0))
918 error = clib_error_return (0, "src and remote addresses are identical");
924 error = clib_error_return (0, "vni not specified");
928 clib_memset (a, 0, sizeof (*a));
931 a->is_ip6 = ipv6_set;
934 #define _(x) a->x = x;
935 foreach_gpe_copy_field;
943 rv = vnet_vxlan_gpe_add_del_tunnel (a, &sw_if_index);
948 vlib_cli_output (vm, "%U\n", format_vnet_sw_if_index_name,
949 vnet_get_main (), sw_if_index);
951 case VNET_API_ERROR_INVALID_DECAP_NEXT:
952 error = clib_error_return (0, "invalid decap-next...");
955 case VNET_API_ERROR_TUNNEL_EXIST:
956 error = clib_error_return (0, "tunnel already exists...");
959 case VNET_API_ERROR_NO_SUCH_ENTRY:
960 error = clib_error_return (0, "tunnel does not exist...");
964 error = clib_error_return
965 (0, "vnet_vxlan_gpe_add_del_tunnel returned %d", rv);
970 unformat_free (line_input);
976 * Add or delete a VXLAN-GPE Tunnel.
978 * VXLAN-GPE provides the features needed to allow L2 bridge domains (BDs)
979 * to span multiple servers. This is done by building an L2 overlay on
980 * top of an L3 network underlay using VXLAN-GPE tunnels.
982 * This makes it possible for servers to be co-located in the same data
983 * center or be separated geographically as long as they are reachable
984 * through the underlay L3 network.
986 * You can refer to this kind of L2 overlay bridge domain as a VXLAN-GPE segment.
989 * Example of how to create a VXLAN-GPE Tunnel:
990 * @cliexcmd{create vxlan-gpe tunnel local 10.0.3.1 remote 10.0.3.3 vni 13 encap-vrf-id 7}
991 * Example of how to delete a VXLAN-GPE Tunnel:
992 * @cliexcmd{create vxlan-gpe tunnel local 10.0.3.1 remote 10.0.3.3 vni 13 del}
995 VLIB_CLI_COMMAND (create_vxlan_gpe_tunnel_command, static) = {
996 .path = "create vxlan-gpe tunnel",
998 "create vxlan-gpe tunnel local <local-addr> "
999 " {remote <remote-addr>|group <mcast-addr> <intf-name>}"
1000 " vni <nn> [next-ip4][next-ip6][next-ethernet][next-nsh]"
1001 " [encap-vrf-id <nn>] [decap-vrf-id <nn>] [del]\n",
1002 .function = vxlan_gpe_add_del_tunnel_command_fn,
1007 * @brief CLI function for showing VXLAN GPE tunnels
1016 static clib_error_t *
1017 show_vxlan_gpe_tunnel_command_fn (vlib_main_t * vm,
1018 unformat_input_t * input,
1019 vlib_cli_command_t * cmd)
1021 vxlan_gpe_main_t *ngm = &vxlan_gpe_main;
1022 vxlan_gpe_tunnel_t *t;
1024 if (pool_elts (ngm->tunnels) == 0)
1025 vlib_cli_output (vm, "No vxlan-gpe tunnels configured.");
1028 pool_foreach (t, ngm->tunnels,
1030 vlib_cli_output (vm, "%U", format_vxlan_gpe_tunnel, t);
1038 * Display all the VXLAN-GPE Tunnel entries.
1041 * Example of how to display the VXLAN-GPE Tunnel entries:
1042 * @cliexstart{show vxlan-gpe tunnel}
1043 * [0] local 10.0.3.1 remote 10.0.3.3 vni 13 encap_fib_index 0 sw_if_index 5 decap_next l2
1047 VLIB_CLI_COMMAND (show_vxlan_gpe_tunnel_command, static) = {
1048 .path = "show vxlan-gpe",
1049 .function = show_vxlan_gpe_tunnel_command_fn,
1054 vnet_int_vxlan_gpe_bypass_mode (u32 sw_if_index, u8 is_ip6, u8 is_enable)
1057 vnet_feature_enable_disable ("ip6-unicast", "ip6-vxlan-gpe-bypass",
1058 sw_if_index, is_enable, 0, 0);
1060 vnet_feature_enable_disable ("ip4-unicast", "ip4-vxlan-gpe-bypass",
1061 sw_if_index, is_enable, 0, 0);
1065 static clib_error_t *
1066 set_ip_vxlan_gpe_bypass (u32 is_ip6,
1067 unformat_input_t * input, vlib_cli_command_t * cmd)
1069 unformat_input_t _line_input, *line_input = &_line_input;
1070 vnet_main_t *vnm = vnet_get_main ();
1071 clib_error_t *error = 0;
1072 u32 sw_if_index, is_enable;
1077 if (!unformat_user (input, unformat_line_input, line_input))
1080 while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
1083 (line_input, unformat_vnet_sw_interface, vnm, &sw_if_index))
1085 else if (unformat (line_input, "del"))
1089 error = unformat_parse_error (line_input);
1094 if (~0 == sw_if_index)
1096 error = clib_error_return (0, "unknown interface `%U'",
1097 format_unformat_error, line_input);
1101 vnet_int_vxlan_gpe_bypass_mode (sw_if_index, is_ip6, is_enable);
1104 unformat_free (line_input);
1109 static clib_error_t *
1110 set_ip4_vxlan_gpe_bypass (vlib_main_t * vm,
1111 unformat_input_t * input, vlib_cli_command_t * cmd)
1113 return set_ip_vxlan_gpe_bypass (0, input, cmd);
1117 * This command adds the 'ip4-vxlan-gpe-bypass' graph node for a given interface.
1118 * By adding the IPv4 vxlan-gpe-bypass graph node to an interface, the node checks
1119 * for and validate input vxlan_gpe packet and bypass ip4-lookup, ip4-local,
1120 * ip4-udp-lookup nodes to speedup vxlan_gpe packet forwarding. This node will
1121 * cause extra overhead to for non-vxlan_gpe packets which is kept at a minimum.
1125 * Example of graph node before ip4-vxlan-gpe-bypass is enabled:
1126 * @cliexstart{show vlib graph ip4-vxlan-gpe-bypass}
1127 * Name Next Previous
1128 * ip4-vxlan-gpe-bypass error-drop [0]
1129 * vxlan4-gpe-input [1]
1133 * Example of how to enable ip4-vxlan-gpe-bypass on an interface:
1134 * @cliexcmd{set interface ip vxlan-gpe-bypass GigabitEthernet2/0/0}
1136 * Example of graph node after ip4-vxlan-gpe-bypass is enabled:
1137 * @cliexstart{show vlib graph ip4-vxlan-gpe-bypass}
1138 * Name Next Previous
1139 * ip4-vxlan-gpe-bypass error-drop [0] ip4-input
1140 * vxlan4-gpe-input [1] ip4-input-no-checksum
1144 * Example of how to display the feature enabled on an interface:
1145 * @cliexstart{show ip interface features GigabitEthernet2/0/0}
1146 * IP feature paths configured on GigabitEthernet2/0/0...
1149 * ip4-vxlan-gpe-bypass
1154 * Example of how to disable ip4-vxlan-gpe-bypass on an interface:
1155 * @cliexcmd{set interface ip vxlan-gpe-bypass GigabitEthernet2/0/0 del}
1159 VLIB_CLI_COMMAND (set_interface_ip_vxlan_gpe_bypass_command, static) = {
1160 .path = "set interface ip vxlan-gpe-bypass",
1161 .function = set_ip4_vxlan_gpe_bypass,
1162 .short_help = "set interface ip vxlan-gpe-bypass <interface> [del]",
1166 static clib_error_t *
1167 set_ip6_vxlan_gpe_bypass (vlib_main_t * vm,
1168 unformat_input_t * input, vlib_cli_command_t * cmd)
1170 return set_ip_vxlan_gpe_bypass (1, input, cmd);
1174 * This command adds the 'ip6-vxlan-gpe-bypass' graph node for a given interface.
1175 * By adding the IPv6 vxlan-gpe-bypass graph node to an interface, the node checks
1176 * for and validate input vxlan_gpe packet and bypass ip6-lookup, ip6-local,
1177 * ip6-udp-lookup nodes to speedup vxlan_gpe packet forwarding. This node will
1178 * cause extra overhead to for non-vxlan_gpe packets which is kept at a minimum.
1182 * Example of graph node before ip6-vxlan-gpe-bypass is enabled:
1183 * @cliexstart{show vlib graph ip6-vxlan-gpe-bypass}
1184 * Name Next Previous
1185 * ip6-vxlan-gpe-bypass error-drop [0]
1186 * vxlan6-gpe-input [1]
1190 * Example of how to enable ip6-vxlan-gpe-bypass on an interface:
1191 * @cliexcmd{set interface ip6 vxlan-gpe-bypass GigabitEthernet2/0/0}
1193 * Example of graph node after ip6-vxlan-gpe-bypass is enabled:
1194 * @cliexstart{show vlib graph ip6-vxlan-gpe-bypass}
1195 * Name Next Previous
1196 * ip6-vxlan-gpe-bypass error-drop [0] ip6-input
1197 * vxlan6-gpe-input [1] ip4-input-no-checksum
1201 * Example of how to display the feature enabled on an interface:
1202 * @cliexstart{show ip interface features GigabitEthernet2/0/0}
1203 * IP feature paths configured on GigabitEthernet2/0/0...
1206 * ip6-vxlan-gpe-bypass
1211 * Example of how to disable ip6-vxlan-gpe-bypass on an interface:
1212 * @cliexcmd{set interface ip6 vxlan-gpe-bypass GigabitEthernet2/0/0 del}
1216 VLIB_CLI_COMMAND (set_interface_ip6_vxlan_gpe_bypass_command, static) = {
1217 .path = "set interface ip6 vxlan-gpe-bypass",
1218 .function = set_ip6_vxlan_gpe_bypass,
1219 .short_help = "set interface ip vxlan-gpe-bypass <interface> [del]",
1224 VNET_FEATURE_INIT (ip4_vxlan_gpe_bypass, static) =
1226 .arc_name = "ip4-unicast",
1227 .node_name = "ip4-vxlan-gpe-bypass",
1228 .runs_before = VNET_FEATURES ("ip4-lookup"),
1231 VNET_FEATURE_INIT (ip6_vxlan_gpe_bypass, static) =
1233 .arc_name = "ip6-unicast",
1234 .node_name = "ip6-vxlan-gpe-bypass",
1235 .runs_before = VNET_FEATURES ("ip6-lookup"),
1240 * @brief Feature init function for VXLAN GPE
1248 vxlan_gpe_init (vlib_main_t * vm)
1250 vxlan_gpe_main_t *ngm = &vxlan_gpe_main;
1252 ngm->vnet_main = vnet_get_main ();
1253 ngm->vlib_main = vm;
1255 ngm->vxlan4_gpe_tunnel_by_key
1256 = hash_create_mem (0, sizeof (vxlan4_gpe_tunnel_key_t), sizeof (uword));
1258 ngm->vxlan6_gpe_tunnel_by_key
1259 = hash_create_mem (0, sizeof (vxlan6_gpe_tunnel_key_t), sizeof (uword));
1262 ngm->mcast_shared = hash_create_mem (0,
1263 sizeof (ip46_address_t),
1264 sizeof (mcast_shared_t));
1265 ngm->vtep6 = hash_create_mem (0, sizeof (ip6_address_t), sizeof (uword));
1267 /* Register the list of standard decap protocols supported */
1268 vxlan_gpe_register_decap_protocol (VXLAN_GPE_PROTOCOL_IP4,
1269 VXLAN_GPE_INPUT_NEXT_IP4_INPUT);
1270 vxlan_gpe_register_decap_protocol (VXLAN_GPE_PROTOCOL_IP6,
1271 VXLAN_GPE_INPUT_NEXT_IP6_INPUT);
1272 vxlan_gpe_register_decap_protocol (VXLAN_GPE_PROTOCOL_ETHERNET,
1273 VXLAN_GPE_INPUT_NEXT_L2_INPUT);
1275 fib_node_register_type (FIB_NODE_TYPE_VXLAN_GPE_TUNNEL, &vxlan_gpe_vft);
1280 VLIB_INIT_FUNCTION (vxlan_gpe_init);
1284 * fd.io coding-style-patch-verification: ON
1287 * eval: (c-set-style "gnu")