2 * decap.c - decapsulate VXLAN GPE
4 * Copyright (c) 2013 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 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.
19 * @brief Functions for decapsulating VXLAN GPE tunnels
23 #include <vlib/vlib.h>
24 #include <vnet/pg/pg.h>
25 #include <vnet/vxlan-gpe/vxlan_gpe.h>
28 * @brief Struct for VXLAN GPE decap packet tracing
36 } vxlan_gpe_rx_trace_t;
39 * @brief Tracing function for VXLAN GPE packet decapsulation
48 format_vxlan_gpe_rx_trace (u8 * s, va_list * args)
50 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
51 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
52 vxlan_gpe_rx_trace_t *t = va_arg (*args, vxlan_gpe_rx_trace_t *);
54 if (t->tunnel_index != ~0)
56 s = format (s, "VXLAN-GPE: tunnel %d next %d error %d", t->tunnel_index,
57 t->next_index, t->error);
61 s = format (s, "VXLAN-GPE: no tunnel next %d error %d\n", t->next_index,
68 * @brief Tracing function for VXLAN GPE packet decapsulation including length
77 format_vxlan_gpe_with_length (u8 * s, va_list * args)
79 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
80 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
87 * @brief Common processing for IPv4 and IPv6 VXLAN GPE decap dispatch functions
89 * It is worth noting that other than trivial UDP forwarding (transit), VXLAN GPE
90 * tunnels are "terminate local". This means that there is no "TX" interface for this
91 * decap case, so that field in the buffer_metadata can be "used for something else".
92 * The something else in this case is, for the IPv4/IPv6 inner-packet type case, the
93 * FIB index used to look up the inner-packet's adjacency.
95 * vnet_buffer(b0)->sw_if_index[VLIB_TX] = t0->decap_fib_index;
102 * @return from_frame->n_vectors
106 vxlan_gpe_input (vlib_main_t * vm,
107 vlib_node_runtime_t * node,
108 vlib_frame_t * from_frame, u8 is_ip4)
110 u32 n_left_from, next_index, *from, *to_next;
111 vxlan_gpe_main_t *nngm = &vxlan_gpe_main;
112 vnet_main_t *vnm = nngm->vnet_main;
113 vnet_interface_main_t *im = &vnm->interface_main;
114 u32 last_tunnel_index = ~0;
115 vxlan4_gpe_tunnel_key_t last_key4;
116 vxlan6_gpe_tunnel_key_t last_key6;
117 u32 ip4_pkts_decapsulated = 0;
118 u32 ip6_pkts_decapsulated = 0;
119 u32 thread_index = vm->thread_index;
120 u32 stats_sw_if_index, stats_n_packets, stats_n_bytes;
123 clib_memset (&last_key4, 0xff, sizeof (last_key4));
125 clib_memset (&last_key6, 0xff, sizeof (last_key6));
127 from = vlib_frame_vector_args (from_frame);
128 n_left_from = from_frame->n_vectors;
130 next_index = node->cached_next_index;
131 stats_sw_if_index = node->runtime_data[0];
132 stats_n_packets = stats_n_bytes = 0;
134 while (n_left_from > 0)
138 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
140 while (n_left_from >= 4 && n_left_to_next >= 2)
143 vlib_buffer_t *b0, *b1;
145 ip4_vxlan_gpe_header_t *iuvn4_0, *iuvn4_1;
146 ip6_vxlan_gpe_header_t *iuvn6_0, *iuvn6_1;
148 u32 tunnel_index0, tunnel_index1;
149 vxlan_gpe_tunnel_t *t0, *t1;
150 vxlan4_gpe_tunnel_key_t key4_0, key4_1;
151 vxlan6_gpe_tunnel_key_t key6_0, key6_1;
153 u32 sw_if_index0, sw_if_index1, len0, len1;
155 /* Prefetch next iteration. */
157 vlib_buffer_t *p2, *p3;
159 p2 = vlib_get_buffer (vm, from[2]);
160 p3 = vlib_get_buffer (vm, from[3]);
162 vlib_prefetch_buffer_header (p2, LOAD);
163 vlib_prefetch_buffer_header (p3, LOAD);
165 CLIB_PREFETCH (p2->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
166 CLIB_PREFETCH (p3->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
178 b0 = vlib_get_buffer (vm, bi0);
179 b1 = vlib_get_buffer (vm, bi1);
183 /* udp leaves current_data pointing at the vxlan-gpe header */
184 vlib_buffer_advance (b0,
185 -(word) (sizeof (udp_header_t) +
186 sizeof (ip4_header_t)));
187 vlib_buffer_advance (b1,
188 -(word) (sizeof (udp_header_t) +
189 sizeof (ip4_header_t)));
191 iuvn4_0 = vlib_buffer_get_current (b0);
192 iuvn4_1 = vlib_buffer_get_current (b1);
194 /* pop (ip, udp, vxlan) */
195 vlib_buffer_advance (b0, sizeof (*iuvn4_0));
196 vlib_buffer_advance (b1, sizeof (*iuvn4_1));
200 /* udp leaves current_data pointing at the vxlan-gpe header */
201 vlib_buffer_advance (b0,
202 -(word) (sizeof (udp_header_t) +
203 sizeof (ip6_header_t)));
204 vlib_buffer_advance (b1,
205 -(word) (sizeof (udp_header_t) +
206 sizeof (ip6_header_t)));
208 iuvn6_0 = vlib_buffer_get_current (b0);
209 iuvn6_1 = vlib_buffer_get_current (b1);
211 /* pop (ip, udp, vxlan) */
212 vlib_buffer_advance (b0, sizeof (*iuvn6_0));
213 vlib_buffer_advance (b1, sizeof (*iuvn6_1));
224 (iuvn4_0->vxlan.protocol < VXLAN_GPE_PROTOCOL_MAX) ?
225 nngm->decap_next_node_list[iuvn4_0->vxlan.protocol] :
226 VXLAN_GPE_INPUT_NEXT_DROP;
228 (iuvn4_1->vxlan.protocol < VXLAN_GPE_PROTOCOL_MAX) ?
229 nngm->decap_next_node_list[iuvn4_1->vxlan.protocol] :
230 VXLAN_GPE_INPUT_NEXT_DROP;
232 key4_0.local = iuvn4_0->ip4.dst_address.as_u32;
233 key4_1.local = iuvn4_1->ip4.dst_address.as_u32;
235 key4_0.remote = iuvn4_0->ip4.src_address.as_u32;
236 key4_1.remote = iuvn4_1->ip4.src_address.as_u32;
238 key4_0.vni = iuvn4_0->vxlan.vni_res;
239 key4_1.vni = iuvn4_1->vxlan.vni_res;
246 next0 = (iuvn6_0->vxlan.protocol < node->n_next_nodes) ?
247 iuvn6_0->vxlan.protocol : VXLAN_GPE_INPUT_NEXT_DROP;
248 next1 = (iuvn6_1->vxlan.protocol < node->n_next_nodes) ?
249 iuvn6_1->vxlan.protocol : VXLAN_GPE_INPUT_NEXT_DROP;
251 key6_0.local.as_u64[0] = iuvn6_0->ip6.dst_address.as_u64[0];
252 key6_0.local.as_u64[1] = iuvn6_0->ip6.dst_address.as_u64[1];
253 key6_1.local.as_u64[0] = iuvn6_1->ip6.dst_address.as_u64[0];
254 key6_1.local.as_u64[1] = iuvn6_1->ip6.dst_address.as_u64[1];
256 key6_0.remote.as_u64[0] = iuvn6_0->ip6.src_address.as_u64[0];
257 key6_0.remote.as_u64[1] = iuvn6_0->ip6.src_address.as_u64[1];
258 key6_1.remote.as_u64[0] = iuvn6_1->ip6.src_address.as_u64[0];
259 key6_1.remote.as_u64[1] = iuvn6_1->ip6.src_address.as_u64[1];
261 key6_0.vni = iuvn6_0->vxlan.vni_res;
262 key6_1.vni = iuvn6_1->vxlan.vni_res;
265 /* Processing packet 0 */
268 /* Processing for key4_0 */
269 if (PREDICT_FALSE ((key4_0.as_u64[0] != last_key4.as_u64[0])
270 || (key4_0.as_u64[1] !=
271 last_key4.as_u64[1])))
273 p0 = hash_get_mem (nngm->vxlan4_gpe_tunnel_by_key, &key4_0);
277 error0 = VXLAN_GPE_ERROR_NO_SUCH_TUNNEL;
281 last_key4.as_u64[0] = key4_0.as_u64[0];
282 last_key4.as_u64[1] = key4_0.as_u64[1];
283 tunnel_index0 = last_tunnel_index = p0[0];
286 tunnel_index0 = last_tunnel_index;
291 (iuvn6_0->vxlan.protocol < VXLAN_GPE_PROTOCOL_MAX) ?
292 nngm->decap_next_node_list[iuvn6_0->vxlan.protocol] :
293 VXLAN_GPE_INPUT_NEXT_DROP;
295 (iuvn6_1->vxlan.protocol < VXLAN_GPE_PROTOCOL_MAX) ?
296 nngm->decap_next_node_list[iuvn6_1->vxlan.protocol] :
297 VXLAN_GPE_INPUT_NEXT_DROP;
299 key6_0.local.as_u64[0] = iuvn6_0->ip6.dst_address.as_u64[0];
300 key6_0.local.as_u64[1] = iuvn6_0->ip6.dst_address.as_u64[1];
301 key6_1.local.as_u64[0] = iuvn6_1->ip6.dst_address.as_u64[0];
302 key6_1.local.as_u64[1] = iuvn6_1->ip6.dst_address.as_u64[1];
304 key6_0.remote.as_u64[0] = iuvn6_0->ip6.src_address.as_u64[0];
305 key6_0.remote.as_u64[1] = iuvn6_0->ip6.src_address.as_u64[1];
306 key6_1.remote.as_u64[0] = iuvn6_1->ip6.src_address.as_u64[0];
307 key6_1.remote.as_u64[1] = iuvn6_1->ip6.src_address.as_u64[1];
309 key6_0.vni = iuvn6_0->vxlan.vni_res;
310 key6_1.vni = iuvn6_1->vxlan.vni_res;
312 /* Processing for key6_0 */
314 (memcmp (&key6_0, &last_key6, sizeof (last_key6)) != 0))
316 p0 = hash_get_mem (nngm->vxlan6_gpe_tunnel_by_key, &key6_0);
320 error0 = VXLAN_GPE_ERROR_NO_SUCH_TUNNEL;
324 memcpy (&last_key6, &key6_0, sizeof (key6_0));
325 tunnel_index0 = last_tunnel_index = p0[0];
328 tunnel_index0 = last_tunnel_index;
331 t0 = pool_elt_at_index (nngm->tunnels, tunnel_index0);
334 sw_if_index0 = t0->sw_if_index;
335 len0 = vlib_buffer_length_in_chain (vm, b0);
337 /* Required to make the l2 tag push / pop code work on l2 subifs */
338 vnet_update_l2_len (b0);
340 /* Set packet input sw_if_index to unicast VXLAN tunnel for learning */
341 vnet_buffer (b0)->sw_if_index[VLIB_RX] = t0->sw_if_index;
344 * ip[46] lookup in the configured FIB
346 vnet_buffer (b0)->sw_if_index[VLIB_TX] = t0->decap_fib_index;
349 ip4_pkts_decapsulated++;
351 ip6_pkts_decapsulated++;
353 stats_n_packets += 1;
354 stats_n_bytes += len0;
356 if (PREDICT_FALSE (sw_if_index0 != stats_sw_if_index))
358 stats_n_packets -= 1;
359 stats_n_bytes -= len0;
361 vlib_increment_combined_counter (im->combined_sw_if_counters +
362 VNET_INTERFACE_COUNTER_RX,
368 stats_n_bytes = len0;
369 stats_sw_if_index = sw_if_index0;
372 trace0:b0->error = error0 ? node->errors[error0] : 0;
374 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
376 vxlan_gpe_rx_trace_t *tr =
377 vlib_add_trace (vm, node, b0, sizeof (*tr));
378 tr->next_index = next0;
380 tr->tunnel_index = tunnel_index0;
383 /* Process packet 1 */
386 /* Processing for key4_1 */
387 if (PREDICT_FALSE ((key4_1.as_u64[0] != last_key4.as_u64[0])
388 || (key4_1.as_u64[1] !=
389 last_key4.as_u64[1])))
391 p1 = hash_get_mem (nngm->vxlan4_gpe_tunnel_by_key, &key4_1);
395 error1 = VXLAN_GPE_ERROR_NO_SUCH_TUNNEL;
399 last_key4.as_u64[0] = key4_1.as_u64[0];
400 last_key4.as_u64[1] = key4_1.as_u64[1];
401 tunnel_index1 = last_tunnel_index = p1[0];
404 tunnel_index1 = last_tunnel_index;
408 /* Processing for key6_1 */
410 (memcmp (&key6_1, &last_key6, sizeof (last_key6)) != 0))
412 p1 = hash_get_mem (nngm->vxlan6_gpe_tunnel_by_key, &key6_1);
416 error1 = VXLAN_GPE_ERROR_NO_SUCH_TUNNEL;
420 memcpy (&last_key6, &key6_1, sizeof (key6_1));
421 tunnel_index1 = last_tunnel_index = p1[0];
424 tunnel_index1 = last_tunnel_index;
427 t1 = pool_elt_at_index (nngm->tunnels, tunnel_index1);
429 sw_if_index1 = t1->sw_if_index;
430 len1 = vlib_buffer_length_in_chain (vm, b1);
432 /* Required to make the l2 tag push / pop code work on l2 subifs */
433 vnet_update_l2_len (b1);
435 /* Set packet input sw_if_index to unicast VXLAN tunnel for learning */
436 vnet_buffer (b1)->sw_if_index[VLIB_RX] = t1->sw_if_index;
439 * ip[46] lookup in the configured FIB
441 vnet_buffer (b1)->sw_if_index[VLIB_TX] = t1->decap_fib_index;
444 ip4_pkts_decapsulated++;
446 ip6_pkts_decapsulated++;
448 stats_n_packets += 1;
449 stats_n_bytes += len1;
451 /* Batch stats increment on the same vxlan tunnel so counter
452 is not incremented per packet */
453 if (PREDICT_FALSE (sw_if_index1 != stats_sw_if_index))
455 stats_n_packets -= 1;
456 stats_n_bytes -= len1;
458 vlib_increment_combined_counter (im->combined_sw_if_counters +
459 VNET_INTERFACE_COUNTER_RX,
465 stats_n_bytes = len1;
466 stats_sw_if_index = sw_if_index1;
468 vnet_buffer (b1)->sw_if_index[VLIB_TX] = t1->decap_fib_index;
470 trace1:b1->error = error1 ? node->errors[error1] : 0;
472 if (PREDICT_FALSE (b1->flags & VLIB_BUFFER_IS_TRACED))
474 vxlan_gpe_rx_trace_t *tr =
475 vlib_add_trace (vm, node, b1, sizeof (*tr));
476 tr->next_index = next1;
478 tr->tunnel_index = tunnel_index1;
481 vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
482 n_left_to_next, bi0, bi1, next0,
486 while (n_left_from > 0 && n_left_to_next > 0)
491 ip4_vxlan_gpe_header_t *iuvn4_0;
492 ip6_vxlan_gpe_header_t *iuvn6_0;
495 vxlan_gpe_tunnel_t *t0;
496 vxlan4_gpe_tunnel_key_t key4_0;
497 vxlan6_gpe_tunnel_key_t key6_0;
499 u32 sw_if_index0, len0;
508 b0 = vlib_get_buffer (vm, bi0);
512 /* udp leaves current_data pointing at the vxlan-gpe header */
513 vlib_buffer_advance (b0,
514 -(word) (sizeof (udp_header_t) +
515 sizeof (ip4_header_t)));
517 iuvn4_0 = vlib_buffer_get_current (b0);
519 /* pop (ip, udp, vxlan) */
520 vlib_buffer_advance (b0, sizeof (*iuvn4_0));
524 /* udp leaves current_data pointing at the vxlan-gpe header */
525 vlib_buffer_advance (b0,
526 -(word) (sizeof (udp_header_t) +
527 sizeof (ip6_header_t)));
529 iuvn6_0 = vlib_buffer_get_current (b0);
531 /* pop (ip, udp, vxlan) */
532 vlib_buffer_advance (b0, sizeof (*iuvn6_0));
541 (iuvn4_0->vxlan.protocol < VXLAN_GPE_PROTOCOL_MAX) ?
542 nngm->decap_next_node_list[iuvn4_0->vxlan.protocol] :
543 VXLAN_GPE_INPUT_NEXT_DROP;
545 key4_0.local = iuvn4_0->ip4.dst_address.as_u32;
546 key4_0.remote = iuvn4_0->ip4.src_address.as_u32;
547 key4_0.vni = iuvn4_0->vxlan.vni_res;
550 /* Processing for key4_0 */
551 if (PREDICT_FALSE ((key4_0.as_u64[0] != last_key4.as_u64[0])
552 || (key4_0.as_u64[1] !=
553 last_key4.as_u64[1])))
555 p0 = hash_get_mem (nngm->vxlan4_gpe_tunnel_by_key, &key4_0);
559 error0 = VXLAN_GPE_ERROR_NO_SUCH_TUNNEL;
563 last_key4.as_u64[0] = key4_0.as_u64[0];
564 last_key4.as_u64[1] = key4_0.as_u64[1];
565 tunnel_index0 = last_tunnel_index = p0[0];
568 tunnel_index0 = last_tunnel_index;
573 (iuvn6_0->vxlan.protocol < VXLAN_GPE_PROTOCOL_MAX) ?
574 nngm->decap_next_node_list[iuvn6_0->vxlan.protocol] :
575 VXLAN_GPE_INPUT_NEXT_DROP;
577 key6_0.local.as_u64[0] = iuvn6_0->ip6.dst_address.as_u64[0];
578 key6_0.local.as_u64[1] = iuvn6_0->ip6.dst_address.as_u64[1];
579 key6_0.remote.as_u64[0] = iuvn6_0->ip6.src_address.as_u64[0];
580 key6_0.remote.as_u64[1] = iuvn6_0->ip6.src_address.as_u64[1];
581 key6_0.vni = iuvn6_0->vxlan.vni_res;
583 /* Processing for key6_0 */
585 (memcmp (&key6_0, &last_key6, sizeof (last_key6)) != 0))
587 p0 = hash_get_mem (nngm->vxlan6_gpe_tunnel_by_key, &key6_0);
591 error0 = VXLAN_GPE_ERROR_NO_SUCH_TUNNEL;
595 memcpy (&last_key6, &key6_0, sizeof (key6_0));
596 tunnel_index0 = last_tunnel_index = p0[0];
599 tunnel_index0 = last_tunnel_index;
602 t0 = pool_elt_at_index (nngm->tunnels, tunnel_index0);
605 sw_if_index0 = t0->sw_if_index;
606 len0 = vlib_buffer_length_in_chain (vm, b0);
608 /* Required to make the l2 tag push / pop code work on l2 subifs */
609 vnet_update_l2_len (b0);
611 /* Set packet input sw_if_index to unicast VXLAN tunnel for learning */
612 vnet_buffer (b0)->sw_if_index[VLIB_RX] = t0->sw_if_index;
615 * ip[46] lookup in the configured FIB
617 vnet_buffer (b0)->sw_if_index[VLIB_TX] = t0->decap_fib_index;
620 ip4_pkts_decapsulated++;
622 ip6_pkts_decapsulated++;
624 stats_n_packets += 1;
625 stats_n_bytes += len0;
627 /* Batch stats increment on the same vxlan-gpe tunnel so counter
628 is not incremented per packet */
629 if (PREDICT_FALSE (sw_if_index0 != stats_sw_if_index))
631 stats_n_packets -= 1;
632 stats_n_bytes -= len0;
634 vlib_increment_combined_counter (im->combined_sw_if_counters +
635 VNET_INTERFACE_COUNTER_RX,
641 stats_n_bytes = len0;
642 stats_sw_if_index = sw_if_index0;
645 trace00:b0->error = error0 ? node->errors[error0] : 0;
647 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
649 vxlan_gpe_rx_trace_t *tr =
650 vlib_add_trace (vm, node, b0, sizeof (*tr));
651 tr->next_index = next0;
653 tr->tunnel_index = tunnel_index0;
655 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
656 n_left_to_next, bi0, next0);
659 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
661 vlib_node_increment_counter (vm, vxlan4_gpe_input_node.index,
662 VXLAN_GPE_ERROR_DECAPSULATED,
663 ip4_pkts_decapsulated);
664 vlib_node_increment_counter (vm, vxlan6_gpe_input_node.index,
665 VXLAN_GPE_ERROR_DECAPSULATED,
666 ip6_pkts_decapsulated);
667 /* Increment any remaining batch stats */
670 vlib_increment_combined_counter (im->combined_sw_if_counters +
671 VNET_INTERFACE_COUNTER_RX,
672 thread_index, stats_sw_if_index,
673 stats_n_packets, stats_n_bytes);
674 node->runtime_data[0] = stats_sw_if_index;
676 return from_frame->n_vectors;
680 * @brief Graph processing dispatch function for IPv4 VXLAN GPE
682 * @node vxlan4-gpe-input
687 * @return from_frame->n_vectors
690 VLIB_NODE_FN (vxlan4_gpe_input_node) (vlib_main_t * vm,
691 vlib_node_runtime_t * node,
692 vlib_frame_t * from_frame)
694 return vxlan_gpe_input (vm, node, from_frame, /* is_ip4 */ 1);
697 #ifndef CLIB_MARCH_VARIANT
699 vxlan_gpe_register_decap_protocol (u8 protocol_id, uword next_node_index)
701 vxlan_gpe_main_t *hm = &vxlan_gpe_main;
702 hm->decap_next_node_list[protocol_id] = next_node_index;
707 vxlan_gpe_unregister_decap_protocol (u8 protocol_id, uword next_node_index)
709 vxlan_gpe_main_t *hm = &vxlan_gpe_main;
710 hm->decap_next_node_list[protocol_id] = VXLAN_GPE_INPUT_NEXT_DROP;
713 #endif /* CLIB_MARCH_VARIANT */
716 * @brief Graph processing dispatch function for IPv6 VXLAN GPE
718 * @node vxlan6-gpe-input
723 * @return from_frame->n_vectors - uword
726 VLIB_NODE_FN (vxlan6_gpe_input_node) (vlib_main_t * vm,
727 vlib_node_runtime_t * node,
728 vlib_frame_t * from_frame)
730 return vxlan_gpe_input (vm, node, from_frame, /* is_ip4 */ 0);
734 * @brief VXLAN GPE error strings
736 static char *vxlan_gpe_error_strings[] = {
737 #define vxlan_gpe_error(n,s) s,
738 #include <vnet/vxlan-gpe/vxlan_gpe_error.def>
739 #undef vxlan_gpe_error
744 VLIB_REGISTER_NODE (vxlan4_gpe_input_node) = {
745 .name = "vxlan4-gpe-input",
746 /* Takes a vector of packets. */
747 .vector_size = sizeof (u32),
748 .type = VLIB_NODE_TYPE_INTERNAL,
749 .n_errors = ARRAY_LEN(vxlan_gpe_error_strings),
750 .error_strings = vxlan_gpe_error_strings,
752 .n_next_nodes = VXLAN_GPE_INPUT_N_NEXT,
754 #define _(s,n) [VXLAN_GPE_INPUT_NEXT_##s] = n,
755 foreach_vxlan_gpe_input_next
759 .format_buffer = format_vxlan_gpe_with_length,
760 .format_trace = format_vxlan_gpe_rx_trace,
761 // $$$$ .unformat_buffer = unformat_vxlan_gpe_header,
766 VLIB_REGISTER_NODE (vxlan6_gpe_input_node) = {
767 .name = "vxlan6-gpe-input",
768 /* Takes a vector of packets. */
769 .vector_size = sizeof (u32),
770 .type = VLIB_NODE_TYPE_INTERNAL,
771 .n_errors = ARRAY_LEN(vxlan_gpe_error_strings),
772 .error_strings = vxlan_gpe_error_strings,
774 .n_next_nodes = VXLAN_GPE_INPUT_N_NEXT,
776 #define _(s,n) [VXLAN_GPE_INPUT_NEXT_##s] = n,
777 foreach_vxlan_gpe_input_next
781 .format_buffer = format_vxlan_gpe_with_length,
782 .format_trace = format_vxlan_gpe_rx_trace,
783 // $$$$ .unformat_buffer = unformat_vxlan_gpe_header,
789 IP_VXLAN_BYPASS_NEXT_DROP,
790 IP_VXLAN_BYPASS_NEXT_VXLAN,
791 IP_VXLAN_BYPASS_N_NEXT,
792 } ip_vxan_bypass_next_t;
795 ip_vxlan_gpe_bypass_inline (vlib_main_t * vm,
796 vlib_node_runtime_t * node,
797 vlib_frame_t * frame, u32 is_ip4)
799 vxlan_gpe_main_t *ngm = &vxlan_gpe_main;
800 u32 *from, *to_next, n_left_from, n_left_to_next, next_index;
801 vlib_node_runtime_t *error_node =
802 vlib_node_get_runtime (vm, ip4_input_node.index);
803 ip4_address_t addr4; /* last IPv4 address matching a local VTEP address */
804 ip6_address_t addr6; /* last IPv6 address matching a local VTEP address */
806 from = vlib_frame_vector_args (frame);
807 n_left_from = frame->n_vectors;
808 next_index = node->cached_next_index;
810 if (node->flags & VLIB_NODE_FLAG_TRACE)
811 ip4_forward_next_trace (vm, node, frame, VLIB_TX);
816 ip6_address_set_zero (&addr6);
818 while (n_left_from > 0)
820 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
822 while (n_left_from >= 4 && n_left_to_next >= 2)
824 vlib_buffer_t *b0, *b1;
825 ip4_header_t *ip40, *ip41;
826 ip6_header_t *ip60, *ip61;
827 udp_header_t *udp0, *udp1;
828 u32 bi0, ip_len0, udp_len0, flags0, next0;
829 u32 bi1, ip_len1, udp_len1, flags1, next1;
830 i32 len_diff0, len_diff1;
831 u8 error0, good_udp0, proto0;
832 u8 error1, good_udp1, proto1;
834 /* Prefetch next iteration. */
836 vlib_buffer_t *p2, *p3;
838 p2 = vlib_get_buffer (vm, from[2]);
839 p3 = vlib_get_buffer (vm, from[3]);
841 vlib_prefetch_buffer_header (p2, LOAD);
842 vlib_prefetch_buffer_header (p3, LOAD);
844 CLIB_PREFETCH (p2->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
845 CLIB_PREFETCH (p3->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
848 bi0 = to_next[0] = from[0];
849 bi1 = to_next[1] = from[1];
855 b0 = vlib_get_buffer (vm, bi0);
856 b1 = vlib_get_buffer (vm, bi1);
859 ip40 = vlib_buffer_get_current (b0);
860 ip41 = vlib_buffer_get_current (b1);
864 ip60 = vlib_buffer_get_current (b0);
865 ip61 = vlib_buffer_get_current (b1);
868 /* Setup packet for next IP feature */
869 vnet_feature_next (&next0, b0);
870 vnet_feature_next (&next1, b1);
874 proto0 = ip40->protocol;
875 proto1 = ip41->protocol;
879 proto0 = ip60->protocol;
880 proto1 = ip61->protocol;
883 /* Process packet 0 */
884 if (proto0 != IP_PROTOCOL_UDP)
885 goto exit0; /* not UDP packet */
888 udp0 = ip4_next_header (ip40);
890 udp0 = ip6_next_header (ip60);
892 if (udp0->dst_port != clib_host_to_net_u16 (UDP_DST_PORT_VXLAN_GPE))
893 goto exit0; /* not VXLAN packet */
895 /* Validate DIP against VTEPs */
898 if (addr4.as_u32 != ip40->dst_address.as_u32)
900 if (!hash_get (ngm->vtep4, ip40->dst_address.as_u32))
901 goto exit0; /* no local VTEP for VXLAN packet */
902 addr4 = ip40->dst_address;
907 if (!ip6_address_is_equal (&addr6, &ip60->dst_address))
909 if (!hash_get_mem (ngm->vtep6, &ip60->dst_address))
910 goto exit0; /* no local VTEP for VXLAN packet */
911 addr6 = ip60->dst_address;
916 good_udp0 = (flags0 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;
918 /* Don't verify UDP checksum for packets with explicit zero checksum. */
919 good_udp0 |= udp0->checksum == 0;
921 /* Verify UDP length */
923 ip_len0 = clib_net_to_host_u16 (ip40->length);
925 ip_len0 = clib_net_to_host_u16 (ip60->payload_length);
926 udp_len0 = clib_net_to_host_u16 (udp0->length);
927 len_diff0 = ip_len0 - udp_len0;
929 /* Verify UDP checksum */
930 if (PREDICT_FALSE (!good_udp0))
932 if ((flags0 & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED) == 0)
935 flags0 = ip4_tcp_udp_validate_checksum (vm, b0);
937 flags0 = ip6_tcp_udp_icmp_validate_checksum (vm, b0);
939 (flags0 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;
945 error0 = good_udp0 ? 0 : IP4_ERROR_UDP_CHECKSUM;
946 error0 = (len_diff0 >= 0) ? error0 : IP4_ERROR_UDP_LENGTH;
950 error0 = good_udp0 ? 0 : IP6_ERROR_UDP_CHECKSUM;
951 error0 = (len_diff0 >= 0) ? error0 : IP6_ERROR_UDP_LENGTH;
955 IP_VXLAN_BYPASS_NEXT_DROP : IP_VXLAN_BYPASS_NEXT_VXLAN;
956 b0->error = error0 ? error_node->errors[error0] : 0;
958 /* vxlan_gpe-input node expect current at VXLAN header */
960 vlib_buffer_advance (b0,
961 sizeof (ip4_header_t) +
962 sizeof (udp_header_t));
964 vlib_buffer_advance (b0,
965 sizeof (ip6_header_t) +
966 sizeof (udp_header_t));
969 /* Process packet 1 */
970 if (proto1 != IP_PROTOCOL_UDP)
971 goto exit1; /* not UDP packet */
974 udp1 = ip4_next_header (ip41);
976 udp1 = ip6_next_header (ip61);
978 if (udp1->dst_port != clib_host_to_net_u16 (UDP_DST_PORT_VXLAN_GPE))
979 goto exit1; /* not VXLAN packet */
981 /* Validate DIP against VTEPs */
984 if (addr4.as_u32 != ip41->dst_address.as_u32)
986 if (!hash_get (ngm->vtep4, ip41->dst_address.as_u32))
987 goto exit1; /* no local VTEP for VXLAN packet */
988 addr4 = ip41->dst_address;
993 if (!ip6_address_is_equal (&addr6, &ip61->dst_address))
995 if (!hash_get_mem (ngm->vtep6, &ip61->dst_address))
996 goto exit1; /* no local VTEP for VXLAN packet */
997 addr6 = ip61->dst_address;
1002 good_udp1 = (flags1 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;
1004 /* Don't verify UDP checksum for packets with explicit zero checksum. */
1005 good_udp1 |= udp1->checksum == 0;
1007 /* Verify UDP length */
1009 ip_len1 = clib_net_to_host_u16 (ip41->length);
1011 ip_len1 = clib_net_to_host_u16 (ip61->payload_length);
1012 udp_len1 = clib_net_to_host_u16 (udp1->length);
1013 len_diff1 = ip_len1 - udp_len1;
1015 /* Verify UDP checksum */
1016 if (PREDICT_FALSE (!good_udp1))
1018 if ((flags1 & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED) == 0)
1021 flags1 = ip4_tcp_udp_validate_checksum (vm, b1);
1023 flags1 = ip6_tcp_udp_icmp_validate_checksum (vm, b1);
1025 (flags1 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;
1031 error1 = good_udp1 ? 0 : IP4_ERROR_UDP_CHECKSUM;
1032 error1 = (len_diff1 >= 0) ? error1 : IP4_ERROR_UDP_LENGTH;
1036 error1 = good_udp1 ? 0 : IP6_ERROR_UDP_CHECKSUM;
1037 error1 = (len_diff1 >= 0) ? error1 : IP6_ERROR_UDP_LENGTH;
1041 IP_VXLAN_BYPASS_NEXT_DROP : IP_VXLAN_BYPASS_NEXT_VXLAN;
1042 b1->error = error1 ? error_node->errors[error1] : 0;
1044 /* vxlan_gpe-input node expect current at VXLAN header */
1046 vlib_buffer_advance (b1,
1047 sizeof (ip4_header_t) +
1048 sizeof (udp_header_t));
1050 vlib_buffer_advance (b1,
1051 sizeof (ip6_header_t) +
1052 sizeof (udp_header_t));
1055 vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
1056 to_next, n_left_to_next,
1057 bi0, bi1, next0, next1);
1060 while (n_left_from > 0 && n_left_to_next > 0)
1066 u32 bi0, ip_len0, udp_len0, flags0, next0;
1068 u8 error0, good_udp0, proto0;
1070 bi0 = to_next[0] = from[0];
1074 n_left_to_next -= 1;
1076 b0 = vlib_get_buffer (vm, bi0);
1078 ip40 = vlib_buffer_get_current (b0);
1080 ip60 = vlib_buffer_get_current (b0);
1082 /* Setup packet for next IP feature */
1083 vnet_feature_next (&next0, b0);
1086 proto0 = ip40->protocol;
1088 proto0 = ip60->protocol;
1090 if (proto0 != IP_PROTOCOL_UDP)
1091 goto exit; /* not UDP packet */
1094 udp0 = ip4_next_header (ip40);
1096 udp0 = ip6_next_header (ip60);
1098 if (udp0->dst_port != clib_host_to_net_u16 (UDP_DST_PORT_VXLAN_GPE))
1099 goto exit; /* not VXLAN packet */
1101 /* Validate DIP against VTEPs */
1104 if (addr4.as_u32 != ip40->dst_address.as_u32)
1106 if (!hash_get (ngm->vtep4, ip40->dst_address.as_u32))
1107 goto exit; /* no local VTEP for VXLAN packet */
1108 addr4 = ip40->dst_address;
1113 if (!ip6_address_is_equal (&addr6, &ip60->dst_address))
1115 if (!hash_get_mem (ngm->vtep6, &ip60->dst_address))
1116 goto exit; /* no local VTEP for VXLAN packet */
1117 addr6 = ip60->dst_address;
1122 good_udp0 = (flags0 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;
1124 /* Don't verify UDP checksum for packets with explicit zero checksum. */
1125 good_udp0 |= udp0->checksum == 0;
1127 /* Verify UDP length */
1129 ip_len0 = clib_net_to_host_u16 (ip40->length);
1131 ip_len0 = clib_net_to_host_u16 (ip60->payload_length);
1132 udp_len0 = clib_net_to_host_u16 (udp0->length);
1133 len_diff0 = ip_len0 - udp_len0;
1135 /* Verify UDP checksum */
1136 if (PREDICT_FALSE (!good_udp0))
1138 if ((flags0 & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED) == 0)
1141 flags0 = ip4_tcp_udp_validate_checksum (vm, b0);
1143 flags0 = ip6_tcp_udp_icmp_validate_checksum (vm, b0);
1145 (flags0 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;
1151 error0 = good_udp0 ? 0 : IP4_ERROR_UDP_CHECKSUM;
1152 error0 = (len_diff0 >= 0) ? error0 : IP4_ERROR_UDP_LENGTH;
1156 error0 = good_udp0 ? 0 : IP6_ERROR_UDP_CHECKSUM;
1157 error0 = (len_diff0 >= 0) ? error0 : IP6_ERROR_UDP_LENGTH;
1161 IP_VXLAN_BYPASS_NEXT_DROP : IP_VXLAN_BYPASS_NEXT_VXLAN;
1162 b0->error = error0 ? error_node->errors[error0] : 0;
1164 /* vxlan_gpe-input node expect current at VXLAN header */
1166 vlib_buffer_advance (b0,
1167 sizeof (ip4_header_t) +
1168 sizeof (udp_header_t));
1170 vlib_buffer_advance (b0,
1171 sizeof (ip6_header_t) +
1172 sizeof (udp_header_t));
1175 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1176 to_next, n_left_to_next,
1180 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1183 return frame->n_vectors;
1186 VLIB_NODE_FN (ip4_vxlan_gpe_bypass_node) (vlib_main_t * vm,
1187 vlib_node_runtime_t * node,
1188 vlib_frame_t * frame)
1190 return ip_vxlan_gpe_bypass_inline (vm, node, frame, /* is_ip4 */ 1);
1194 VLIB_REGISTER_NODE (ip4_vxlan_gpe_bypass_node) = {
1195 .name = "ip4-vxlan-gpe-bypass",
1196 .vector_size = sizeof (u32),
1198 .n_next_nodes = IP_VXLAN_BYPASS_N_NEXT,
1200 [IP_VXLAN_BYPASS_NEXT_DROP] = "error-drop",
1201 [IP_VXLAN_BYPASS_NEXT_VXLAN] = "vxlan4-gpe-input",
1204 .format_buffer = format_ip4_header,
1205 .format_trace = format_ip4_forward_next_trace,
1209 #ifndef CLIB_MARCH_VARIANT
1210 /* Dummy init function to get us linked in. */
1212 ip4_vxlan_gpe_bypass_init (vlib_main_t * vm)
1217 VLIB_INIT_FUNCTION (ip4_vxlan_gpe_bypass_init);
1218 #endif /* CLIB_MARCH_VARIANT */
1220 VLIB_NODE_FN (ip6_vxlan_gpe_bypass_node) (vlib_main_t * vm,
1221 vlib_node_runtime_t * node,
1222 vlib_frame_t * frame)
1224 return ip_vxlan_gpe_bypass_inline (vm, node, frame, /* is_ip4 */ 0);
1228 VLIB_REGISTER_NODE (ip6_vxlan_gpe_bypass_node) = {
1229 .name = "ip6-vxlan-gpe-bypass",
1230 .vector_size = sizeof (u32),
1232 .n_next_nodes = IP_VXLAN_BYPASS_N_NEXT,
1234 [IP_VXLAN_BYPASS_NEXT_DROP] = "error-drop",
1235 [IP_VXLAN_BYPASS_NEXT_VXLAN] = "vxlan6-gpe-input",
1238 .format_buffer = format_ip6_header,
1239 .format_trace = format_ip6_forward_next_trace,
1243 #ifndef CLIB_MARCH_VARIANT
1244 /* Dummy init function to get us linked in. */
1246 ip6_vxlan_gpe_bypass_init (vlib_main_t * vm)
1251 VLIB_INIT_FUNCTION (ip6_vxlan_gpe_bypass_init);
1252 #endif /* CLIB_MARCH_VARIANT */
1255 * fd.io coding-style-patch-verification: ON
1258 * eval: (c-set-style "gnu")