4 * Copyright (c) 2018 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:
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or aipiped 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.
19 #include <vnet/adj/adj_midchain.h>
20 #include <vnet/ipip/ipip.h>
21 #include <vnet/vnet.h>
22 #include <vnet/adj/adj_nbr.h>
23 #include <vnet/adj/adj_midchain.h>
24 #include <vnet/fib/ip4_fib.h>
25 #include <vnet/fib/ip6_fib.h>
26 #include <vnet/ip/format.h>
27 #include <vnet/ipip/ipip.h>
28 #include <vnet/teib/teib.h>
29 #include <vnet/tunnel/tunnel_dp.h>
31 ipip_main_t ipip_main;
33 /* Packet trace structure */
43 format_ipip_tx_trace (u8 * s, va_list * args)
45 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
46 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
47 ipip_tx_trace_t *t = va_arg (*args, ipip_tx_trace_t *);
50 format (s, "IPIP: tunnel %d len %d src %U dst %U", t->tunnel_id,
51 t->length, format_ip46_address, &t->src, IP46_TYPE_ANY,
52 format_ip46_address, &t->dst, IP46_TYPE_ANY);
57 ipip_build_rewrite (vnet_main_t * vnm, u32 sw_if_index,
58 vnet_link_t link_type, const void *dst_address)
60 const ip46_address_t *dst;
67 t = ipip_tunnel_db_find_by_sw_if_index (sw_if_index);
75 case IPIP_TRANSPORT_IP4:
76 vec_validate (rewrite, sizeof (*ip4) - 1);
77 ip4 = (ip4_header_t *) rewrite;
78 ip4->ip_version_and_header_length = 0x45;
80 /* fixup ip4 header length, protocol and checksum after-the-fact */
81 ip4->src_address.as_u32 = t->tunnel_src.ip4.as_u32;
82 ip4->dst_address.as_u32 = dst->ip4.as_u32;
83 if (!(t->flags & TUNNEL_ENCAP_DECAP_FLAG_ENCAP_COPY_DSCP))
84 ip4_header_set_dscp (ip4, t->dscp);
85 if (t->flags & TUNNEL_ENCAP_DECAP_FLAG_ENCAP_SET_DF)
86 ip4_header_set_df (ip4);
91 ip4->protocol = IP_PROTOCOL_IPV6;
94 ip4->protocol = IP_PROTOCOL_IP_IN_IP;
97 ip4->protocol = IP_PROTOCOL_MPLS_IN_IP;
102 ip4->checksum = ip4_header_checksum (ip4);
105 case IPIP_TRANSPORT_IP6:
106 vec_validate (rewrite, sizeof (*ip6) - 1);
107 ip6 = (ip6_header_t *) rewrite;
108 ip6->ip_version_traffic_class_and_flow_label =
109 clib_host_to_net_u32 (6 << 28);
111 /* fixup ip6 header length and protocol after-the-fact */
112 ip6->src_address.as_u64[0] = t->tunnel_src.ip6.as_u64[0];
113 ip6->src_address.as_u64[1] = t->tunnel_src.ip6.as_u64[1];
114 ip6->dst_address.as_u64[0] = dst->ip6.as_u64[0];
115 ip6->dst_address.as_u64[1] = dst->ip6.as_u64[1];
116 if (!(t->flags & TUNNEL_ENCAP_DECAP_FLAG_ENCAP_COPY_DSCP))
117 ip6_set_dscp_network_order (ip6, t->dscp);
122 ip6->protocol = IP_PROTOCOL_IPV6;
125 ip6->protocol = IP_PROTOCOL_IP_IN_IP;
128 ip6->protocol = IP_PROTOCOL_MPLS_IN_IP;
139 ipip64_fixup (vlib_main_t * vm, const ip_adjacency_t * adj, vlib_buffer_t * b,
142 tunnel_encap_decap_flags_t flags;
145 flags = pointer_to_uword (data);
147 ip4 = vlib_buffer_get_current (b);
148 ip4->length = clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b));
149 tunnel_encap_fixup_6o4 (flags, ((ip6_header_t *) (ip4 + 1)), ip4);
151 if (PREDICT_FALSE (b->flags & VNET_BUFFER_F_GSO))
153 vnet_buffer2 (b)->outer_l3_hdr_offset = (u8 *) ip4 - b->data;
154 vnet_buffer_offload_flags_set (b, VNET_BUFFER_OFFLOAD_F_OUTER_IP_CKSUM |
155 VNET_BUFFER_OFFLOAD_F_TNL_IPIP);
158 ip4->checksum = ip4_header_checksum (ip4);
162 ipip44_fixup (vlib_main_t * vm, const ip_adjacency_t * adj, vlib_buffer_t * b,
165 tunnel_encap_decap_flags_t flags;
168 flags = pointer_to_uword (data);
170 ip4 = vlib_buffer_get_current (b);
171 ip4->length = clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b));
172 tunnel_encap_fixup_4o4 (flags, ip4 + 1, ip4);
174 if (PREDICT_FALSE (b->flags & VNET_BUFFER_F_GSO))
176 vnet_buffer2 (b)->outer_l3_hdr_offset = (u8 *) ip4 - b->data;
177 vnet_buffer_offload_flags_set (b, VNET_BUFFER_OFFLOAD_F_OUTER_IP_CKSUM |
178 VNET_BUFFER_OFFLOAD_F_TNL_IPIP);
181 ip4->checksum = ip4_header_checksum (ip4);
185 ipip46_fixup (vlib_main_t * vm, const ip_adjacency_t * adj, vlib_buffer_t * b,
188 tunnel_encap_decap_flags_t flags;
191 flags = pointer_to_uword (data);
193 /* Must set locally originated otherwise we're not allowed to
194 fragment the packet later */
195 b->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
197 ip6 = vlib_buffer_get_current (b);
198 ip6->payload_length =
199 clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b) -
201 tunnel_encap_fixup_4o6 (flags, b, ((ip4_header_t *) (ip6 + 1)), ip6);
203 if (PREDICT_FALSE (b->flags & VNET_BUFFER_F_GSO))
205 vnet_buffer2 (b)->outer_l3_hdr_offset = (u8 *) ip6 - b->data;
206 vnet_buffer_offload_flags_set (b, VNET_BUFFER_OFFLOAD_F_TNL_IPIP);
211 ipip66_fixup (vlib_main_t * vm,
212 const ip_adjacency_t * adj, vlib_buffer_t * b, const void *data)
214 tunnel_encap_decap_flags_t flags;
217 flags = pointer_to_uword (data);
219 /* Must set locally originated otherwise we're not allowed to
220 fragment the packet later */
221 b->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
223 ip6 = vlib_buffer_get_current (b);
224 ip6->payload_length =
225 clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b) -
227 tunnel_encap_fixup_6o6 (flags, ip6 + 1, ip6);
229 if (PREDICT_FALSE (b->flags & VNET_BUFFER_F_GSO))
231 vnet_buffer2 (b)->outer_l3_hdr_offset = (u8 *) ip6 - b->data;
232 vnet_buffer_offload_flags_set (b, VNET_BUFFER_OFFLOAD_F_TNL_IPIP);
237 ipipm6_fixup (vlib_main_t *vm, const ip_adjacency_t *adj, vlib_buffer_t *b,
240 tunnel_encap_decap_flags_t flags;
243 flags = pointer_to_uword (data);
245 /* Must set locally originated otherwise we're not allowed to
246 fragment the packet later and we'll get an unwanted hop-limt
248 b->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
250 ip6 = vlib_buffer_get_current (b);
251 ip6->payload_length =
252 clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b) - sizeof (*ip6));
253 tunnel_encap_fixup_mplso6 (flags, b, (mpls_unicast_header_t *) (ip6 + 1),
256 if (PREDICT_FALSE (b->flags & VNET_BUFFER_F_GSO))
258 vnet_buffer2 (b)->outer_l3_hdr_offset = (u8 *) ip6 - b->data;
259 vnet_buffer_offload_flags_set (b, VNET_BUFFER_OFFLOAD_F_TNL_IPIP);
264 ipipm4_fixup (vlib_main_t *vm, const ip_adjacency_t *adj, vlib_buffer_t *b,
267 tunnel_encap_decap_flags_t flags;
270 flags = pointer_to_uword (data);
272 /* Must set locally originated otherwise we'll do a TTL decrement
273 * during ip4-rewrite */
274 b->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
276 ip4 = vlib_buffer_get_current (b);
278 clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b) - sizeof (*ip4));
279 tunnel_encap_fixup_mplso4 (flags, (mpls_unicast_header_t *) (ip4 + 1), ip4);
281 if (PREDICT_FALSE (b->flags & VNET_BUFFER_F_GSO))
283 vnet_buffer2 (b)->outer_l3_hdr_offset = (u8 *) ip4 - b->data;
284 vnet_buffer_offload_flags_set (b, VNET_BUFFER_OFFLOAD_F_OUTER_IP_CKSUM |
285 VNET_BUFFER_OFFLOAD_F_TNL_IPIP);
288 ip4->checksum = ip4_header_checksum (ip4);
292 ipip_tunnel_stack (adj_index_t ai)
299 sw_if_index = adj->rewrite_header.sw_if_index;
301 t = ipip_tunnel_db_find_by_sw_if_index (sw_if_index);
305 if ((vnet_hw_interface_get_flags (vnet_get_main (), t->hw_if_index) &
306 VNET_HW_INTERFACE_FLAG_LINK_UP) == 0)
308 adj_midchain_delegate_unstack (ai);
313 .fp_len = t->transport == IPIP_TRANSPORT_IP6 ? 128 : 32,
314 .fp_proto = (t->transport == IPIP_TRANSPORT_IP6 ?
317 .fp_addr = t->tunnel_dst
320 adj_midchain_delegate_stack (ai, t->fib_index, &dst);
325 ipip_adj_walk_cb (adj_index_t ai, void *ctx)
327 ipip_tunnel_stack (ai);
329 return (ADJ_WALK_RC_CONTINUE);
333 ipip_tunnel_restack (ipip_tunnel_t * gt)
335 fib_protocol_t proto;
338 * walk all the adjacencies on th IPIP interface and restack them
340 FOR_EACH_FIB_IP_PROTOCOL (proto)
342 adj_nbr_walk (gt->sw_if_index, proto, ipip_adj_walk_cb, NULL);
346 static adj_midchain_fixup_t
347 ipip_get_fixup (const ipip_tunnel_t * t, vnet_link_t lt, adj_flags_t * aflags)
349 if (t->transport == IPIP_TRANSPORT_IP6 && lt == VNET_LINK_IP6)
350 return (ipip66_fixup);
351 if (t->transport == IPIP_TRANSPORT_IP6 && lt == VNET_LINK_IP4)
352 return (ipip46_fixup);
353 if (t->transport == IPIP_TRANSPORT_IP6 && lt == VNET_LINK_MPLS)
354 return (ipipm6_fixup);
355 if (t->transport == IPIP_TRANSPORT_IP4 && lt == VNET_LINK_IP6)
356 return (ipip64_fixup);
357 if (t->transport == IPIP_TRANSPORT_IP4 && lt == VNET_LINK_MPLS)
358 return (ipipm4_fixup);
359 if (t->transport == IPIP_TRANSPORT_IP4 && lt == VNET_LINK_IP4)
361 *aflags = *aflags | ADJ_FLAG_MIDCHAIN_FIXUP_IP4O4_HDR;
362 return (ipip44_fixup);
366 return (ipip44_fixup);
370 ipip_update_adj (vnet_main_t * vnm, u32 sw_if_index, adj_index_t ai)
372 adj_midchain_fixup_t fixup;
377 t = ipip_tunnel_db_find_by_sw_if_index (sw_if_index);
382 * the user has not requested that the load-balancing be based on
383 * a flow hash of the inner packet. so use the stacking to choose
386 if (!(t->flags & TUNNEL_ENCAP_DECAP_FLAG_ENCAP_INNER_HASH))
387 af |= ADJ_FLAG_MIDCHAIN_IP_STACK;
389 fixup = ipip_get_fixup (t, adj_get_link_type (ai), &af);
390 adj_nbr_midchain_update_rewrite
392 uword_to_pointer (t->flags, void *), af,
393 ipip_build_rewrite (vnm, sw_if_index,
394 adj_get_link_type (ai), &t->tunnel_dst));
395 ipip_tunnel_stack (ai);
398 typedef struct mipip_walk_ctx_t_
400 const ipip_tunnel_t *t;
401 const teib_entry_t *ne;
405 mipip_mk_complete_walk (adj_index_t ai, void *data)
407 adj_midchain_fixup_t fixup;
408 mipip_walk_ctx_t *ctx = data;
412 fixup = ipip_get_fixup (ctx->t, adj_get_link_type (ai), &af);
415 * the user has not requested that the load-balancing be based on
416 * a flow hash of the inner packet. so use the stacking to choose
419 if (!(ctx->t->flags & TUNNEL_ENCAP_DECAP_FLAG_ENCAP_INNER_HASH))
420 af |= ADJ_FLAG_MIDCHAIN_IP_STACK;
422 adj_nbr_midchain_update_rewrite
424 uword_to_pointer (ctx->t->flags, void *),
425 af, ipip_build_rewrite (vnet_get_main (),
427 adj_get_link_type (ai),
428 &teib_entry_get_nh (ctx->ne)->fp_addr));
430 teib_entry_adj_stack (ctx->ne, ai);
432 return (ADJ_WALK_RC_CONTINUE);
436 mipip_mk_incomplete_walk (adj_index_t ai, void *data)
438 adj_midchain_fixup_t fixup;
439 ipip_tunnel_t *t = data;
443 fixup = ipip_get_fixup (t, adj_get_link_type (ai), &af);
445 adj_nbr_midchain_update_rewrite (ai, fixup, NULL, ADJ_FLAG_NONE, NULL);
447 adj_midchain_delegate_unstack (ai);
449 return (ADJ_WALK_RC_CONTINUE);
453 mipip_update_adj (vnet_main_t * vnm, u32 sw_if_index, adj_index_t ai)
455 ipip_main_t *gm = &ipip_main;
456 adj_midchain_fixup_t fixup;
465 ti = gm->tunnel_index_by_sw_if_index[sw_if_index];
466 t = pool_elt_at_index (gm->tunnels, ti);
468 ne = teib_entry_find_46 (sw_if_index,
469 adj->ia_nh_proto, &adj->sub_type.nbr.next_hop);
473 // no TEIB entry to provide the next-hop
474 fixup = ipip_get_fixup (t, adj_get_link_type (ai), &af);
475 adj_nbr_midchain_update_rewrite
476 (ai, fixup, uword_to_pointer (t->flags, void *), ADJ_FLAG_NONE, NULL);
480 mipip_walk_ctx_t ctx = {
484 adj_nbr_walk_nh (sw_if_index,
486 &adj->sub_type.nbr.next_hop, mipip_mk_complete_walk, &ctx);
490 format_ipip_tunnel_name (u8 * s, va_list * args)
492 u32 dev_instance = va_arg (*args, u32);
493 ipip_main_t *gm = &ipip_main;
496 if (dev_instance >= vec_len (gm->tunnels))
497 return format (s, "<improperly-referenced>");
499 t = pool_elt_at_index (gm->tunnels, dev_instance);
500 return format (s, "ipip%d", t->user_instance);
504 format_ipip_device (u8 * s, va_list * args)
506 u32 dev_instance = va_arg (*args, u32);
507 CLIB_UNUSED (int verbose) = va_arg (*args, int);
509 s = format (s, "IPIP tunnel: id %d\n", dev_instance);
513 static clib_error_t *
514 ipip_interface_admin_up_down (vnet_main_t * vnm, u32 hw_if_index, u32 flags)
516 vnet_hw_interface_t *hi;
519 hi = vnet_get_hw_interface (vnm, hw_if_index);
521 t = ipip_tunnel_db_find_by_sw_if_index (hi->sw_if_index);
525 if (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
526 vnet_hw_interface_set_flags (vnm, hw_if_index,
527 VNET_HW_INTERFACE_FLAG_LINK_UP);
529 vnet_hw_interface_set_flags (vnm, hw_if_index, 0 /* down */ );
531 ipip_tunnel_restack (t);
533 return /* no error */ 0;
537 ipip_tunnel_desc (u32 sw_if_index,
538 ip46_address_t * src, ip46_address_t * dst, u8 * is_l2)
542 t = ipip_tunnel_db_find_by_sw_if_index (sw_if_index);
546 *src = t->tunnel_src;
547 *dst = t->tunnel_dst;
553 VNET_DEVICE_CLASS(ipip_device_class) = {
554 .name = "IPIP tunnel device",
555 .format_device_name = format_ipip_tunnel_name,
556 .format_device = format_ipip_device,
557 .format_tx_trace = format_ipip_tx_trace,
558 .admin_up_down_function = ipip_interface_admin_up_down,
559 .ip_tun_desc = ipip_tunnel_desc,
565 VNET_HW_INTERFACE_CLASS(ipip_hw_interface_class) = {
567 //.format_header = format_ipip_header_with_length,
568 //.unformat_header = unformat_ipip_header,
569 .build_rewrite = ipip_build_rewrite,
570 .update_adjacency = ipip_update_adj,
571 .flags = VNET_HW_INTERFACE_CLASS_FLAG_P2P,
574 VNET_HW_INTERFACE_CLASS(mipip_hw_interface_class) = {
576 //.format_header = format_ipip_header_with_length,
577 //.unformat_header = unformat_ipip_header,
578 .build_rewrite = ipip_build_rewrite,
579 .update_adjacency = mipip_update_adj,
580 .flags = VNET_HW_INTERFACE_CLASS_FLAG_NBMA,
584 ipip_tunnel_db_find (const ipip_tunnel_key_t * key)
586 ipip_main_t *gm = &ipip_main;
589 p = hash_get_mem (gm->tunnel_by_key, key);
592 return (pool_elt_at_index (gm->tunnels, p[0]));
596 ipip_tunnel_db_find_by_sw_if_index (u32 sw_if_index)
598 ipip_main_t *gm = &ipip_main;
599 if (vec_len (gm->tunnel_index_by_sw_if_index) <= sw_if_index)
601 u32 ti = gm->tunnel_index_by_sw_if_index[sw_if_index];
604 return pool_elt_at_index (gm->tunnels, ti);
608 ipip_tunnel_db_add (ipip_tunnel_t * t, const ipip_tunnel_key_t * key)
610 ipip_main_t *gm = &ipip_main;
612 hash_set_mem_alloc (&gm->tunnel_by_key, key, t->dev_instance);
616 ipip_tunnel_db_remove (ipip_tunnel_t * t, const ipip_tunnel_key_t * key)
618 ipip_main_t *gm = &ipip_main;
620 hash_unset_mem_free (&gm->tunnel_by_key, key);
624 ipip_mk_key_i (ipip_transport_t transport,
626 const ip46_address_t * src,
627 const ip46_address_t * dst,
628 u32 fib_index, ipip_tunnel_key_t * key)
630 key->transport = transport;
634 key->fib_index = fib_index;
639 ipip_mk_key (const ipip_tunnel_t * t, ipip_tunnel_key_t * key)
641 ipip_mk_key_i (t->transport, t->mode,
642 &t->tunnel_src, &t->tunnel_dst, t->fib_index, key);
646 ipip_teib_mk_key (const ipip_tunnel_t * t,
647 const teib_entry_t * ne, ipip_tunnel_key_t * key)
649 const fib_prefix_t *nh;
651 nh = teib_entry_get_nh (ne);
653 /* construct the key using mode P2P so it can be found in the DP */
654 ipip_mk_key_i (t->transport, IPIP_MODE_P2P,
655 &t->tunnel_src, &nh->fp_addr,
656 teib_entry_get_fib_index (ne), key);
660 ipip_teib_entry_added (const teib_entry_t * ne)
662 ipip_main_t *gm = &ipip_main;
663 const ip_address_t *nh;
664 ipip_tunnel_key_t key;
669 sw_if_index = teib_entry_get_sw_if_index (ne);
670 if (vec_len (gm->tunnel_index_by_sw_if_index) < sw_if_index)
673 t_idx = gm->tunnel_index_by_sw_if_index[sw_if_index];
675 if (INDEX_INVALID == t_idx)
678 t = pool_elt_at_index (gm->tunnels, t_idx);
680 ipip_teib_mk_key (t, ne, &key);
681 ipip_tunnel_db_add (t, &key);
683 // update the rewrites for each of the adjacencies for this next-hop
684 mipip_walk_ctx_t ctx = {
688 nh = teib_entry_get_peer (ne);
689 adj_nbr_walk_nh (teib_entry_get_sw_if_index (ne),
690 (AF_IP4 == ip_addr_version (nh) ?
693 &ip_addr_46 (nh), mipip_mk_complete_walk, &ctx);
697 ipip_teib_entry_deleted (const teib_entry_t * ne)
699 ipip_main_t *gm = &ipip_main;
700 const ip_address_t *nh;
701 ipip_tunnel_key_t key;
706 sw_if_index = teib_entry_get_sw_if_index (ne);
707 if (vec_len (gm->tunnel_index_by_sw_if_index) < sw_if_index)
710 t_idx = gm->tunnel_index_by_sw_if_index[sw_if_index];
712 if (INDEX_INVALID == t_idx)
715 t = pool_elt_at_index (gm->tunnels, t_idx);
717 ipip_teib_mk_key (t, ne, &key);
718 ipip_tunnel_db_remove (t, &key);
720 nh = teib_entry_get_peer (ne);
722 /* make all the adjacencies incomplete */
723 adj_nbr_walk_nh (teib_entry_get_sw_if_index (ne),
724 (AF_IP4 == ip_addr_version (nh) ?
727 &ip_addr_46 (nh), mipip_mk_incomplete_walk, t);
731 ipip_tunnel_delete_teib_walk (index_t nei, void *ctx)
733 ipip_tunnel_t *t = ctx;
734 ipip_tunnel_key_t key;
736 ipip_teib_mk_key (t, teib_entry_get (nei), &key);
737 ipip_tunnel_db_remove (t, &key);
739 return (WALK_CONTINUE);
743 ipip_tunnel_add_teib_walk (index_t nei, void *ctx)
745 ipip_tunnel_t *t = ctx;
746 ipip_tunnel_key_t key;
748 ipip_teib_mk_key (t, teib_entry_get (nei), &key);
749 ipip_tunnel_db_add (t, &key);
751 return (WALK_CONTINUE);
755 ipip_add_tunnel (ipip_transport_t transport,
756 u32 instance, ip46_address_t * src, ip46_address_t * dst,
757 u32 fib_index, tunnel_encap_decap_flags_t flags,
758 ip_dscp_t dscp, tunnel_mode_t tmode, u32 * sw_if_indexp)
760 ipip_main_t *gm = &ipip_main;
761 vnet_main_t *vnm = gm->vnet_main;
763 vnet_hw_interface_t *hi;
764 u32 hw_if_index, sw_if_index;
765 ipip_tunnel_key_t key;
768 if (tmode == TUNNEL_MODE_MP && !ip46_address_is_zero (dst))
769 return (VNET_API_ERROR_INVALID_DST_ADDRESS);
771 mode = (tmode == TUNNEL_MODE_P2P ? IPIP_MODE_P2P : IPIP_MODE_P2MP);
772 ipip_mk_key_i (transport, mode, src, dst, fib_index, &key);
774 t = ipip_tunnel_db_find (&key);
778 sw_if_indexp[0] = t->sw_if_index;
779 return VNET_API_ERROR_IF_ALREADY_EXISTS;
782 pool_get_aligned (gm->tunnels, t, CLIB_CACHE_LINE_BYTES);
783 clib_memset (t, 0, sizeof (*t));
785 /* Reconcile the real dev_instance and a possible requested instance */
786 u32 t_idx = t - gm->tunnels; /* tunnel index (or instance) */
787 u32 u_idx = instance; /* user specified instance */
790 if (hash_get (gm->instance_used, u_idx))
792 pool_put (gm->tunnels, t);
793 return VNET_API_ERROR_INSTANCE_IN_USE;
795 hash_set (gm->instance_used, u_idx, 1);
797 t->dev_instance = t_idx; /* actual */
798 t->user_instance = u_idx; /* name */
800 hw_if_index = vnet_register_interface (vnm, ipip_device_class.index, t_idx,
801 (mode == IPIP_MODE_P2P ?
802 ipip_hw_interface_class.index :
803 mipip_hw_interface_class.index),
806 hi = vnet_get_hw_interface (vnm, hw_if_index);
807 sw_if_index = hi->sw_if_index;
810 t->hw_if_index = hw_if_index;
811 t->fib_index = fib_index;
812 t->sw_if_index = sw_if_index;
815 t->transport = transport;
817 vec_validate_init_empty (gm->tunnel_index_by_sw_if_index, sw_if_index, ~0);
818 gm->tunnel_index_by_sw_if_index[sw_if_index] = t_idx;
820 if (t->transport == IPIP_TRANSPORT_IP4)
821 hi->frame_overhead = sizeof (ip4_header_t);
823 hi->frame_overhead = sizeof (ip6_header_t);
825 hi->min_frame_size = hi->frame_overhead + 64;
827 /* Standard default ipip MTU. */
828 vnet_sw_interface_set_mtu (vnm, sw_if_index, 9000);
829 vnet_set_interface_l3_output_node (gm->vlib_main, sw_if_index,
830 (u8 *) "tunnel-output");
832 t->tunnel_src = *src;
833 t->tunnel_dst = *dst;
835 ipip_tunnel_db_add (t, &key);
837 if (t->mode == IPIP_MODE_P2MP)
838 teib_walk_itf (t->sw_if_index, ipip_tunnel_add_teib_walk, t);
841 *sw_if_indexp = sw_if_index;
843 if (t->transport == IPIP_TRANSPORT_IP6 && !gm->ip6_protocol_registered)
845 ip6_register_protocol (IP_PROTOCOL_IP_IN_IP, ipip6_input_node.index);
846 ip6_register_protocol (IP_PROTOCOL_MPLS_IN_IP, ipip6_input_node.index);
847 ip6_register_protocol (IP_PROTOCOL_IPV6, ipip6_input_node.index);
848 gm->ip6_protocol_registered = true;
850 else if (t->transport == IPIP_TRANSPORT_IP4 && !gm->ip4_protocol_registered)
852 ip4_register_protocol (IP_PROTOCOL_IP_IN_IP, ipip4_input_node.index);
853 ip4_register_protocol (IP_PROTOCOL_MPLS_IN_IP, ipip4_input_node.index);
854 ip4_register_protocol (IP_PROTOCOL_IPV6, ipip4_input_node.index);
855 gm->ip4_protocol_registered = true;
861 ipip_del_tunnel (u32 sw_if_index)
863 ipip_main_t *gm = &ipip_main;
864 vnet_main_t *vnm = gm->vnet_main;
866 ipip_tunnel_key_t key;
868 t = ipip_tunnel_db_find_by_sw_if_index (sw_if_index);
870 return VNET_API_ERROR_NO_SUCH_ENTRY;
872 if (t->mode == IPIP_MODE_P2MP)
873 teib_walk_itf (t->sw_if_index, ipip_tunnel_delete_teib_walk, t);
875 vnet_sw_interface_set_flags (vnm, sw_if_index, 0 /* down */ );
876 vnet_reset_interface_l3_output_node (gm->vlib_main, t->sw_if_index);
877 gm->tunnel_index_by_sw_if_index[sw_if_index] = ~0;
878 vnet_delete_hw_interface (vnm, t->hw_if_index);
879 hash_unset (gm->instance_used, t->user_instance);
881 ipip_mk_key (t, &key);
882 ipip_tunnel_db_remove (t, &key);
883 pool_put (gm->tunnels, t);
888 const static teib_vft_t ipip_teib_vft = {
889 .nv_added = ipip_teib_entry_added,
890 .nv_deleted = ipip_teib_entry_deleted,
893 static clib_error_t *
894 ipip_init (vlib_main_t * vm)
896 ipip_main_t *gm = &ipip_main;
898 clib_memset (gm, 0, sizeof (gm[0]));
900 gm->vnet_main = vnet_get_main ();
902 hash_create_mem (0, sizeof (ipip_tunnel_key_t), sizeof (uword));
904 teib_register (&ipip_teib_vft);
909 VLIB_INIT_FUNCTION (ipip_init);
912 * fd.io coding-style-patch-verification: ON
915 * eval: (c-set-style "gnu")