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/vxlan-gpe/vxlan_gpe.h>
27 * @brief Struct for VXLAN GPE decap packet tracing
35 } vxlan_gpe_rx_trace_t;
38 * @brief Tracing function for VXLAN GPE packet decapsulation
47 format_vxlan_gpe_rx_trace (u8 * s, va_list * args)
49 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
50 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
51 vxlan_gpe_rx_trace_t *t = va_arg (*args, vxlan_gpe_rx_trace_t *);
53 if (t->tunnel_index != ~0)
55 s = format (s, "VXLAN-GPE: tunnel %d next %d error %d", t->tunnel_index,
56 t->next_index, t->error);
60 s = format (s, "VXLAN-GPE: no tunnel next %d error %d\n", t->next_index,
67 * @brief Tracing function for VXLAN GPE packet decapsulation including length
76 format_vxlan_gpe_with_length (u8 * s, va_list * args)
78 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
79 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
86 * @brief Common processing for IPv4 and IPv6 VXLAN GPE decap dispatch functions
88 * It is worth noting that other than trivial UDP forwarding (transit), VXLAN GPE
89 * tunnels are "terminate local". This means that there is no "TX" interface for this
90 * decap case, so that field in the buffer_metadata can be "used for something else".
91 * The something else in this case is, for the IPv4/IPv6 inner-packet type case, the
92 * FIB index used to look up the inner-packet's adjacency.
94 * vnet_buffer(b0)->sw_if_index[VLIB_TX] = t0->decap_fib_index;
101 * @return from_frame->n_vectors
105 vxlan_gpe_input (vlib_main_t * vm,
106 vlib_node_runtime_t * node,
107 vlib_frame_t * from_frame, u8 is_ip4)
109 u32 n_left_from, next_index, *from, *to_next;
110 vxlan_gpe_main_t *nngm = &vxlan_gpe_main;
111 vnet_main_t *vnm = nngm->vnet_main;
112 vnet_interface_main_t *im = &vnm->interface_main;
113 u32 last_tunnel_index = ~0;
114 vxlan4_gpe_tunnel_key_t last_key4;
115 vxlan6_gpe_tunnel_key_t last_key6;
116 u32 pkts_decapsulated = 0;
117 u32 thread_index = vm->thread_index;
118 u32 stats_sw_if_index, stats_n_packets, stats_n_bytes;
121 clib_memset (&last_key4, 0xff, sizeof (last_key4));
123 clib_memset (&last_key6, 0xff, sizeof (last_key6));
125 from = vlib_frame_vector_args (from_frame);
126 n_left_from = from_frame->n_vectors;
128 next_index = node->cached_next_index;
129 stats_sw_if_index = node->runtime_data[0];
130 stats_n_packets = stats_n_bytes = 0;
132 while (n_left_from > 0)
136 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
138 while (n_left_from >= 4 && n_left_to_next >= 2)
141 vlib_buffer_t *b0, *b1;
143 ip4_vxlan_gpe_header_t *iuvn4_0, *iuvn4_1;
144 ip6_vxlan_gpe_header_t *iuvn6_0, *iuvn6_1;
146 u32 tunnel_index0, tunnel_index1;
147 vxlan_gpe_tunnel_t *t0, *t1;
148 vxlan4_gpe_tunnel_key_t key4_0, key4_1;
149 vxlan6_gpe_tunnel_key_t key6_0, key6_1;
151 u32 sw_if_index0, sw_if_index1, len0, len1;
153 /* Prefetch next iteration. */
155 vlib_buffer_t *p2, *p3;
157 p2 = vlib_get_buffer (vm, from[2]);
158 p3 = vlib_get_buffer (vm, from[3]);
160 vlib_prefetch_buffer_header (p2, LOAD);
161 vlib_prefetch_buffer_header (p3, LOAD);
163 CLIB_PREFETCH (p2->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
164 CLIB_PREFETCH (p3->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
176 b0 = vlib_get_buffer (vm, bi0);
177 b1 = vlib_get_buffer (vm, bi1);
181 /* udp leaves current_data pointing at the vxlan-gpe header */
182 vlib_buffer_advance (b0,
183 -(word) (sizeof (udp_header_t) +
184 sizeof (ip4_header_t)));
185 vlib_buffer_advance (b1,
186 -(word) (sizeof (udp_header_t) +
187 sizeof (ip4_header_t)));
189 iuvn4_0 = vlib_buffer_get_current (b0);
190 iuvn4_1 = vlib_buffer_get_current (b1);
192 /* pop (ip, udp, vxlan) */
193 vlib_buffer_advance (b0, sizeof (*iuvn4_0));
194 vlib_buffer_advance (b1, sizeof (*iuvn4_1));
198 /* udp leaves current_data pointing at the vxlan-gpe header */
199 vlib_buffer_advance (b0,
200 -(word) (sizeof (udp_header_t) +
201 sizeof (ip6_header_t)));
202 vlib_buffer_advance (b1,
203 -(word) (sizeof (udp_header_t) +
204 sizeof (ip6_header_t)));
206 iuvn6_0 = vlib_buffer_get_current (b0);
207 iuvn6_1 = vlib_buffer_get_current (b1);
209 /* pop (ip, udp, vxlan) */
210 vlib_buffer_advance (b0, sizeof (*iuvn6_0));
211 vlib_buffer_advance (b1, sizeof (*iuvn6_1));
222 (iuvn4_0->vxlan.protocol < VXLAN_GPE_PROTOCOL_MAX) ?
223 nngm->decap_next_node_list[iuvn4_0->vxlan.protocol] :
224 VXLAN_GPE_INPUT_NEXT_DROP;
226 (iuvn4_1->vxlan.protocol < VXLAN_GPE_PROTOCOL_MAX) ?
227 nngm->decap_next_node_list[iuvn4_1->vxlan.protocol] :
228 VXLAN_GPE_INPUT_NEXT_DROP;
230 key4_0.local = iuvn4_0->ip4.dst_address.as_u32;
231 key4_1.local = iuvn4_1->ip4.dst_address.as_u32;
233 key4_0.remote = iuvn4_0->ip4.src_address.as_u32;
234 key4_1.remote = iuvn4_1->ip4.src_address.as_u32;
236 key4_0.vni = iuvn4_0->vxlan.vni_res;
237 key4_1.vni = iuvn4_1->vxlan.vni_res;
244 next0 = (iuvn6_0->vxlan.protocol < node->n_next_nodes) ?
245 iuvn6_0->vxlan.protocol : VXLAN_GPE_INPUT_NEXT_DROP;
246 next1 = (iuvn6_1->vxlan.protocol < node->n_next_nodes) ?
247 iuvn6_1->vxlan.protocol : VXLAN_GPE_INPUT_NEXT_DROP;
249 key6_0.local.as_u64[0] = iuvn6_0->ip6.dst_address.as_u64[0];
250 key6_0.local.as_u64[1] = iuvn6_0->ip6.dst_address.as_u64[1];
251 key6_1.local.as_u64[0] = iuvn6_1->ip6.dst_address.as_u64[0];
252 key6_1.local.as_u64[1] = iuvn6_1->ip6.dst_address.as_u64[1];
254 key6_0.remote.as_u64[0] = iuvn6_0->ip6.src_address.as_u64[0];
255 key6_0.remote.as_u64[1] = iuvn6_0->ip6.src_address.as_u64[1];
256 key6_1.remote.as_u64[0] = iuvn6_1->ip6.src_address.as_u64[0];
257 key6_1.remote.as_u64[1] = iuvn6_1->ip6.src_address.as_u64[1];
259 key6_0.vni = iuvn6_0->vxlan.vni_res;
260 key6_1.vni = iuvn6_1->vxlan.vni_res;
263 /* Processing packet 0 */
266 /* Processing for key4_0 */
267 if (PREDICT_FALSE ((key4_0.as_u64[0] != last_key4.as_u64[0])
268 || (key4_0.as_u64[1] !=
269 last_key4.as_u64[1])))
271 p0 = hash_get_mem (nngm->vxlan4_gpe_tunnel_by_key, &key4_0);
275 error0 = VXLAN_GPE_ERROR_NO_SUCH_TUNNEL;
279 last_key4.as_u64[0] = key4_0.as_u64[0];
280 last_key4.as_u64[1] = key4_0.as_u64[1];
281 tunnel_index0 = last_tunnel_index = p0[0];
284 tunnel_index0 = last_tunnel_index;
289 (iuvn6_0->vxlan.protocol < VXLAN_GPE_PROTOCOL_MAX) ?
290 nngm->decap_next_node_list[iuvn6_0->vxlan.protocol] :
291 VXLAN_GPE_INPUT_NEXT_DROP;
293 (iuvn6_1->vxlan.protocol < VXLAN_GPE_PROTOCOL_MAX) ?
294 nngm->decap_next_node_list[iuvn6_1->vxlan.protocol] :
295 VXLAN_GPE_INPUT_NEXT_DROP;
297 key6_0.local.as_u64[0] = iuvn6_0->ip6.dst_address.as_u64[0];
298 key6_0.local.as_u64[1] = iuvn6_0->ip6.dst_address.as_u64[1];
299 key6_1.local.as_u64[0] = iuvn6_1->ip6.dst_address.as_u64[0];
300 key6_1.local.as_u64[1] = iuvn6_1->ip6.dst_address.as_u64[1];
302 key6_0.remote.as_u64[0] = iuvn6_0->ip6.src_address.as_u64[0];
303 key6_0.remote.as_u64[1] = iuvn6_0->ip6.src_address.as_u64[1];
304 key6_1.remote.as_u64[0] = iuvn6_1->ip6.src_address.as_u64[0];
305 key6_1.remote.as_u64[1] = iuvn6_1->ip6.src_address.as_u64[1];
307 key6_0.vni = iuvn6_0->vxlan.vni_res;
308 key6_1.vni = iuvn6_1->vxlan.vni_res;
310 /* Processing for key6_0 */
312 (memcmp (&key6_0, &last_key6, sizeof (last_key6)) != 0))
314 p0 = hash_get_mem (nngm->vxlan6_gpe_tunnel_by_key, &key6_0);
318 error0 = VXLAN_GPE_ERROR_NO_SUCH_TUNNEL;
322 memcpy (&last_key6, &key6_0, sizeof (key6_0));
323 tunnel_index0 = last_tunnel_index = p0[0];
326 tunnel_index0 = last_tunnel_index;
329 t0 = pool_elt_at_index (nngm->tunnels, tunnel_index0);
332 sw_if_index0 = t0->sw_if_index;
333 len0 = vlib_buffer_length_in_chain (vm, b0);
335 /* Required to make the l2 tag push / pop code work on l2 subifs */
336 vnet_update_l2_len (b0);
338 /* Set packet input sw_if_index to unicast VXLAN tunnel for learning */
339 vnet_buffer (b0)->sw_if_index[VLIB_RX] = t0->sw_if_index;
342 * ip[46] lookup in the configured FIB
344 vnet_buffer (b0)->sw_if_index[VLIB_TX] = t0->decap_fib_index;
347 stats_n_packets += 1;
348 stats_n_bytes += len0;
350 if (PREDICT_FALSE (sw_if_index0 != stats_sw_if_index))
352 stats_n_packets -= 1;
353 stats_n_bytes -= len0;
355 vlib_increment_combined_counter (im->combined_sw_if_counters +
356 VNET_INTERFACE_COUNTER_RX,
362 stats_n_bytes = len0;
363 stats_sw_if_index = sw_if_index0;
366 trace0:b0->error = error0 ? node->errors[error0] : 0;
368 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
370 vxlan_gpe_rx_trace_t *tr =
371 vlib_add_trace (vm, node, b0, sizeof (*tr));
372 tr->next_index = next0;
374 tr->tunnel_index = tunnel_index0;
377 /* Process packet 1 */
380 /* Processing for key4_1 */
381 if (PREDICT_FALSE ((key4_1.as_u64[0] != last_key4.as_u64[0])
382 || (key4_1.as_u64[1] !=
383 last_key4.as_u64[1])))
385 p1 = hash_get_mem (nngm->vxlan4_gpe_tunnel_by_key, &key4_1);
389 error1 = VXLAN_GPE_ERROR_NO_SUCH_TUNNEL;
393 last_key4.as_u64[0] = key4_1.as_u64[0];
394 last_key4.as_u64[1] = key4_1.as_u64[1];
395 tunnel_index1 = last_tunnel_index = p1[0];
398 tunnel_index1 = last_tunnel_index;
402 /* Processing for key6_1 */
404 (memcmp (&key6_1, &last_key6, sizeof (last_key6)) != 0))
406 p1 = hash_get_mem (nngm->vxlan6_gpe_tunnel_by_key, &key6_1);
410 error1 = VXLAN_GPE_ERROR_NO_SUCH_TUNNEL;
414 memcpy (&last_key6, &key6_1, sizeof (key6_1));
415 tunnel_index1 = last_tunnel_index = p1[0];
418 tunnel_index1 = last_tunnel_index;
421 t1 = pool_elt_at_index (nngm->tunnels, tunnel_index1);
423 sw_if_index1 = t1->sw_if_index;
424 len1 = vlib_buffer_length_in_chain (vm, b1);
426 /* Required to make the l2 tag push / pop code work on l2 subifs */
427 vnet_update_l2_len (b1);
429 /* Set packet input sw_if_index to unicast VXLAN tunnel for learning */
430 vnet_buffer (b1)->sw_if_index[VLIB_RX] = t1->sw_if_index;
433 * ip[46] lookup in the configured FIB
435 vnet_buffer (b1)->sw_if_index[VLIB_TX] = t1->decap_fib_index;
438 stats_n_packets += 1;
439 stats_n_bytes += len1;
441 /* Batch stats increment on the same vxlan tunnel so counter
442 is not incremented per packet */
443 if (PREDICT_FALSE (sw_if_index1 != stats_sw_if_index))
445 stats_n_packets -= 1;
446 stats_n_bytes -= len1;
448 vlib_increment_combined_counter (im->combined_sw_if_counters +
449 VNET_INTERFACE_COUNTER_RX,
455 stats_n_bytes = len1;
456 stats_sw_if_index = sw_if_index1;
458 vnet_buffer (b1)->sw_if_index[VLIB_TX] = t1->decap_fib_index;
460 trace1:b1->error = error1 ? node->errors[error1] : 0;
462 if (PREDICT_FALSE (b1->flags & VLIB_BUFFER_IS_TRACED))
464 vxlan_gpe_rx_trace_t *tr =
465 vlib_add_trace (vm, node, b1, sizeof (*tr));
466 tr->next_index = next1;
468 tr->tunnel_index = tunnel_index1;
471 vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
472 n_left_to_next, bi0, bi1, next0,
476 while (n_left_from > 0 && n_left_to_next > 0)
481 ip4_vxlan_gpe_header_t *iuvn4_0;
482 ip6_vxlan_gpe_header_t *iuvn6_0;
485 vxlan_gpe_tunnel_t *t0;
486 vxlan4_gpe_tunnel_key_t key4_0;
487 vxlan6_gpe_tunnel_key_t key6_0;
489 u32 sw_if_index0, len0;
498 b0 = vlib_get_buffer (vm, bi0);
502 /* udp leaves current_data pointing at the vxlan-gpe header */
503 vlib_buffer_advance (b0,
504 -(word) (sizeof (udp_header_t) +
505 sizeof (ip4_header_t)));
507 iuvn4_0 = vlib_buffer_get_current (b0);
509 /* pop (ip, udp, vxlan) */
510 vlib_buffer_advance (b0, sizeof (*iuvn4_0));
514 /* udp leaves current_data pointing at the vxlan-gpe header */
515 vlib_buffer_advance (b0,
516 -(word) (sizeof (udp_header_t) +
517 sizeof (ip6_header_t)));
519 iuvn6_0 = vlib_buffer_get_current (b0);
521 /* pop (ip, udp, vxlan) */
522 vlib_buffer_advance (b0, sizeof (*iuvn6_0));
531 (iuvn4_0->vxlan.protocol < VXLAN_GPE_PROTOCOL_MAX) ?
532 nngm->decap_next_node_list[iuvn4_0->vxlan.protocol] :
533 VXLAN_GPE_INPUT_NEXT_DROP;
535 key4_0.local = iuvn4_0->ip4.dst_address.as_u32;
536 key4_0.remote = iuvn4_0->ip4.src_address.as_u32;
537 key4_0.vni = iuvn4_0->vxlan.vni_res;
540 /* Processing for key4_0 */
541 if (PREDICT_FALSE ((key4_0.as_u64[0] != last_key4.as_u64[0])
542 || (key4_0.as_u64[1] !=
543 last_key4.as_u64[1])))
545 p0 = hash_get_mem (nngm->vxlan4_gpe_tunnel_by_key, &key4_0);
549 error0 = VXLAN_GPE_ERROR_NO_SUCH_TUNNEL;
553 last_key4.as_u64[0] = key4_0.as_u64[0];
554 last_key4.as_u64[1] = key4_0.as_u64[1];
555 tunnel_index0 = last_tunnel_index = p0[0];
558 tunnel_index0 = last_tunnel_index;
563 (iuvn6_0->vxlan.protocol < VXLAN_GPE_PROTOCOL_MAX) ?
564 nngm->decap_next_node_list[iuvn6_0->vxlan.protocol] :
565 VXLAN_GPE_INPUT_NEXT_DROP;
567 key6_0.local.as_u64[0] = iuvn6_0->ip6.dst_address.as_u64[0];
568 key6_0.local.as_u64[1] = iuvn6_0->ip6.dst_address.as_u64[1];
569 key6_0.remote.as_u64[0] = iuvn6_0->ip6.src_address.as_u64[0];
570 key6_0.remote.as_u64[1] = iuvn6_0->ip6.src_address.as_u64[1];
571 key6_0.vni = iuvn6_0->vxlan.vni_res;
573 /* Processing for key6_0 */
575 (memcmp (&key6_0, &last_key6, sizeof (last_key6)) != 0))
577 p0 = hash_get_mem (nngm->vxlan6_gpe_tunnel_by_key, &key6_0);
581 error0 = VXLAN_GPE_ERROR_NO_SUCH_TUNNEL;
585 memcpy (&last_key6, &key6_0, sizeof (key6_0));
586 tunnel_index0 = last_tunnel_index = p0[0];
589 tunnel_index0 = last_tunnel_index;
592 t0 = pool_elt_at_index (nngm->tunnels, tunnel_index0);
595 sw_if_index0 = t0->sw_if_index;
596 len0 = vlib_buffer_length_in_chain (vm, b0);
598 /* Required to make the l2 tag push / pop code work on l2 subifs */
599 vnet_update_l2_len (b0);
601 /* Set packet input sw_if_index to unicast VXLAN tunnel for learning */
602 vnet_buffer (b0)->sw_if_index[VLIB_RX] = t0->sw_if_index;
605 * ip[46] lookup in the configured FIB
607 vnet_buffer (b0)->sw_if_index[VLIB_TX] = t0->decap_fib_index;
610 stats_n_packets += 1;
611 stats_n_bytes += len0;
613 /* Batch stats increment on the same vxlan-gpe tunnel so counter
614 is not incremented per packet */
615 if (PREDICT_FALSE (sw_if_index0 != stats_sw_if_index))
617 stats_n_packets -= 1;
618 stats_n_bytes -= len0;
620 vlib_increment_combined_counter (im->combined_sw_if_counters +
621 VNET_INTERFACE_COUNTER_RX,
627 stats_n_bytes = len0;
628 stats_sw_if_index = sw_if_index0;
631 trace00:b0->error = error0 ? node->errors[error0] : 0;
633 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
635 vxlan_gpe_rx_trace_t *tr =
636 vlib_add_trace (vm, node, b0, sizeof (*tr));
637 tr->next_index = next0;
639 tr->tunnel_index = tunnel_index0;
641 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
642 n_left_to_next, bi0, next0);
645 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
648 vlib_node_increment_counter (vm,
649 is_ip4 ? vxlan4_gpe_input_node.index :
650 vxlan6_gpe_input_node.index,
651 VXLAN_GPE_ERROR_DECAPSULATED,
654 /* Increment any remaining batch stats */
657 vlib_increment_combined_counter (im->combined_sw_if_counters +
658 VNET_INTERFACE_COUNTER_RX,
659 thread_index, stats_sw_if_index,
660 stats_n_packets, stats_n_bytes);
661 node->runtime_data[0] = stats_sw_if_index;
663 return from_frame->n_vectors;
667 * @brief Graph processing dispatch function for IPv4 VXLAN GPE
669 * @node vxlan4-gpe-input
674 * @return from_frame->n_vectors
677 VLIB_NODE_FN (vxlan4_gpe_input_node) (vlib_main_t * vm,
678 vlib_node_runtime_t * node,
679 vlib_frame_t * from_frame)
681 return vxlan_gpe_input (vm, node, from_frame, /* is_ip4 */ 1);
684 #ifndef CLIB_MARCH_VARIANT
686 vxlan_gpe_register_decap_protocol (u8 protocol_id, uword next_node_index)
688 vxlan_gpe_main_t *hm = &vxlan_gpe_main;
689 hm->decap_next_node_list[protocol_id] = next_node_index;
694 vxlan_gpe_unregister_decap_protocol (u8 protocol_id, uword next_node_index)
696 vxlan_gpe_main_t *hm = &vxlan_gpe_main;
697 hm->decap_next_node_list[protocol_id] = VXLAN_GPE_INPUT_NEXT_DROP;
700 #endif /* CLIB_MARCH_VARIANT */
703 * @brief Graph processing dispatch function for IPv6 VXLAN GPE
705 * @node vxlan6-gpe-input
710 * @return from_frame->n_vectors - uword
713 VLIB_NODE_FN (vxlan6_gpe_input_node) (vlib_main_t * vm,
714 vlib_node_runtime_t * node,
715 vlib_frame_t * from_frame)
717 return vxlan_gpe_input (vm, node, from_frame, /* is_ip4 */ 0);
721 * @brief VXLAN GPE error strings
723 static char *vxlan_gpe_error_strings[] = {
724 #define vxlan_gpe_error(n,s) s,
725 #include <vnet/vxlan-gpe/vxlan_gpe_error.def>
726 #undef vxlan_gpe_error
731 VLIB_REGISTER_NODE (vxlan4_gpe_input_node) = {
732 .name = "vxlan4-gpe-input",
733 /* Takes a vector of packets. */
734 .vector_size = sizeof (u32),
735 .type = VLIB_NODE_TYPE_INTERNAL,
736 .n_errors = ARRAY_LEN(vxlan_gpe_error_strings),
737 .error_strings = vxlan_gpe_error_strings,
739 .n_next_nodes = VXLAN_GPE_INPUT_N_NEXT,
741 #define _(s,n) [VXLAN_GPE_INPUT_NEXT_##s] = n,
742 foreach_vxlan_gpe_input_next
746 .format_buffer = format_vxlan_gpe_with_length,
747 .format_trace = format_vxlan_gpe_rx_trace,
748 // $$$$ .unformat_buffer = unformat_vxlan_gpe_header,
753 VLIB_REGISTER_NODE (vxlan6_gpe_input_node) = {
754 .name = "vxlan6-gpe-input",
755 /* Takes a vector of packets. */
756 .vector_size = sizeof (u32),
757 .type = VLIB_NODE_TYPE_INTERNAL,
758 .n_errors = ARRAY_LEN(vxlan_gpe_error_strings),
759 .error_strings = vxlan_gpe_error_strings,
761 .n_next_nodes = VXLAN_GPE_INPUT_N_NEXT,
763 #define _(s,n) [VXLAN_GPE_INPUT_NEXT_##s] = n,
764 foreach_vxlan_gpe_input_next
768 .format_buffer = format_vxlan_gpe_with_length,
769 .format_trace = format_vxlan_gpe_rx_trace,
770 // $$$$ .unformat_buffer = unformat_vxlan_gpe_header,
776 IP_VXLAN_BYPASS_NEXT_DROP,
777 IP_VXLAN_BYPASS_NEXT_VXLAN,
778 IP_VXLAN_BYPASS_N_NEXT,
779 } ip_vxlan_bypass_next_t;
782 ip_vxlan_gpe_bypass_inline (vlib_main_t * vm,
783 vlib_node_runtime_t * node,
784 vlib_frame_t * frame, u32 is_ip4)
786 vxlan_gpe_main_t *ngm = &vxlan_gpe_main;
787 u32 *from, *to_next, n_left_from, n_left_to_next, next_index;
788 vlib_node_runtime_t *error_node =
789 vlib_node_get_runtime (vm, ip4_input_node.index);
790 vtep4_key_t last_vtep4; /* last IPv4 address / fib index
791 matching a local VTEP address */
792 vtep6_key_t last_vtep6; /* last IPv6 address / fib index
793 matching a local VTEP address */
794 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
795 #ifdef CLIB_HAVE_VEC512
796 vtep4_cache_t vtep4_u512;
797 clib_memset (&vtep4_u512, 0, sizeof (vtep4_u512));
800 from = vlib_frame_vector_args (frame);
801 n_left_from = frame->n_vectors;
802 next_index = node->cached_next_index;
804 vlib_get_buffers (vm, from, bufs, n_left_from);
806 if (node->flags & VLIB_NODE_FLAG_TRACE)
807 ip4_forward_next_trace (vm, node, frame, VLIB_TX);
810 vtep4_key_init (&last_vtep4);
812 vtep6_key_init (&last_vtep6);
814 while (n_left_from > 0)
816 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
818 while (n_left_from >= 4 && n_left_to_next >= 2)
820 vlib_buffer_t *b0, *b1;
821 ip4_header_t *ip40, *ip41;
822 ip6_header_t *ip60, *ip61;
823 udp_header_t *udp0, *udp1;
824 u32 bi0, ip_len0, udp_len0, flags0, next0;
825 u32 bi1, ip_len1, udp_len1, flags1, next1;
826 i32 len_diff0, len_diff1;
827 u8 error0, good_udp0, proto0;
828 u8 error1, good_udp1, proto1;
830 /* Prefetch next iteration. */
832 vlib_prefetch_buffer_header (b[2], LOAD);
833 vlib_prefetch_buffer_header (b[3], LOAD);
835 CLIB_PREFETCH (b[2]->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
836 CLIB_PREFETCH (b[3]->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
839 bi0 = to_next[0] = from[0];
840 bi1 = to_next[1] = from[1];
851 ip40 = vlib_buffer_get_current (b0);
852 ip41 = vlib_buffer_get_current (b1);
856 ip60 = vlib_buffer_get_current (b0);
857 ip61 = vlib_buffer_get_current (b1);
860 /* Setup packet for next IP feature */
861 vnet_feature_next (&next0, b0);
862 vnet_feature_next (&next1, b1);
866 proto0 = ip40->protocol;
867 proto1 = ip41->protocol;
871 proto0 = ip60->protocol;
872 proto1 = ip61->protocol;
875 /* Process packet 0 */
876 if (proto0 != IP_PROTOCOL_UDP)
877 goto exit0; /* not UDP packet */
880 udp0 = ip4_next_header (ip40);
882 udp0 = ip6_next_header (ip60);
884 if (udp0->dst_port != clib_host_to_net_u16 (UDP_DST_PORT_VXLAN_GPE))
885 goto exit0; /* not VXLAN packet */
887 /* Validate DIP against VTEPs */
890 #ifdef CLIB_HAVE_VEC512
891 if (!vtep4_check_vector
892 (&ngm->vtep_table, b0, ip40, &last_vtep4, &vtep4_u512))
894 if (!vtep4_check (&ngm->vtep_table, b0, ip40, &last_vtep4))
896 goto exit0; /* no local VTEP for VXLAN packet */
900 if (!vtep6_check (&ngm->vtep_table, b0, ip60, &last_vtep6))
901 goto exit0; /* no local VTEP for VXLAN packet */
905 good_udp0 = (flags0 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;
907 /* Don't verify UDP checksum for packets with explicit zero checksum. */
908 good_udp0 |= udp0->checksum == 0;
910 /* Verify UDP length */
912 ip_len0 = clib_net_to_host_u16 (ip40->length);
914 ip_len0 = clib_net_to_host_u16 (ip60->payload_length);
915 udp_len0 = clib_net_to_host_u16 (udp0->length);
916 len_diff0 = ip_len0 - udp_len0;
918 /* Verify UDP checksum */
919 if (PREDICT_FALSE (!good_udp0))
921 if ((flags0 & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED) == 0)
924 flags0 = ip4_tcp_udp_validate_checksum (vm, b0);
926 flags0 = ip6_tcp_udp_icmp_validate_checksum (vm, b0);
928 (flags0 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;
934 error0 = good_udp0 ? 0 : IP4_ERROR_UDP_CHECKSUM;
935 error0 = (len_diff0 >= 0) ? error0 : IP4_ERROR_UDP_LENGTH;
939 error0 = good_udp0 ? 0 : IP6_ERROR_UDP_CHECKSUM;
940 error0 = (len_diff0 >= 0) ? error0 : IP6_ERROR_UDP_LENGTH;
944 IP_VXLAN_BYPASS_NEXT_DROP : IP_VXLAN_BYPASS_NEXT_VXLAN;
945 b0->error = error0 ? error_node->errors[error0] : 0;
947 /* vxlan_gpe-input node expect current at VXLAN header */
949 vlib_buffer_advance (b0,
950 sizeof (ip4_header_t) +
951 sizeof (udp_header_t));
953 vlib_buffer_advance (b0,
954 sizeof (ip6_header_t) +
955 sizeof (udp_header_t));
958 /* Process packet 1 */
959 if (proto1 != IP_PROTOCOL_UDP)
960 goto exit1; /* not UDP packet */
963 udp1 = ip4_next_header (ip41);
965 udp1 = ip6_next_header (ip61);
967 if (udp1->dst_port != clib_host_to_net_u16 (UDP_DST_PORT_VXLAN_GPE))
968 goto exit1; /* not VXLAN packet */
970 /* Validate DIP against VTEPs */
973 #ifdef CLIB_HAVE_VEC512
974 if (!vtep4_check_vector
975 (&ngm->vtep_table, b1, ip41, &last_vtep4, &vtep4_u512))
977 if (!vtep4_check (&ngm->vtep_table, b1, ip41, &last_vtep4))
979 goto exit1; /* no local VTEP for VXLAN packet */
983 if (!vtep6_check (&ngm->vtep_table, b1, ip61, &last_vtep6))
984 goto exit1; /* no local VTEP for VXLAN packet */
988 good_udp1 = (flags1 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;
990 /* Don't verify UDP checksum for packets with explicit zero checksum. */
991 good_udp1 |= udp1->checksum == 0;
993 /* Verify UDP length */
995 ip_len1 = clib_net_to_host_u16 (ip41->length);
997 ip_len1 = clib_net_to_host_u16 (ip61->payload_length);
998 udp_len1 = clib_net_to_host_u16 (udp1->length);
999 len_diff1 = ip_len1 - udp_len1;
1001 /* Verify UDP checksum */
1002 if (PREDICT_FALSE (!good_udp1))
1004 if ((flags1 & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED) == 0)
1007 flags1 = ip4_tcp_udp_validate_checksum (vm, b1);
1009 flags1 = ip6_tcp_udp_icmp_validate_checksum (vm, b1);
1011 (flags1 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;
1017 error1 = good_udp1 ? 0 : IP4_ERROR_UDP_CHECKSUM;
1018 error1 = (len_diff1 >= 0) ? error1 : IP4_ERROR_UDP_LENGTH;
1022 error1 = good_udp1 ? 0 : IP6_ERROR_UDP_CHECKSUM;
1023 error1 = (len_diff1 >= 0) ? error1 : IP6_ERROR_UDP_LENGTH;
1027 IP_VXLAN_BYPASS_NEXT_DROP : IP_VXLAN_BYPASS_NEXT_VXLAN;
1028 b1->error = error1 ? error_node->errors[error1] : 0;
1030 /* vxlan_gpe-input node expect current at VXLAN header */
1032 vlib_buffer_advance (b1,
1033 sizeof (ip4_header_t) +
1034 sizeof (udp_header_t));
1036 vlib_buffer_advance (b1,
1037 sizeof (ip6_header_t) +
1038 sizeof (udp_header_t));
1041 vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
1042 to_next, n_left_to_next,
1043 bi0, bi1, next0, next1);
1046 while (n_left_from > 0 && n_left_to_next > 0)
1052 u32 bi0, ip_len0, udp_len0, flags0, next0;
1054 u8 error0, good_udp0, proto0;
1056 bi0 = to_next[0] = from[0];
1060 n_left_to_next -= 1;
1065 ip40 = vlib_buffer_get_current (b0);
1067 ip60 = vlib_buffer_get_current (b0);
1069 /* Setup packet for next IP feature */
1070 vnet_feature_next (&next0, b0);
1073 proto0 = ip40->protocol;
1075 proto0 = ip60->protocol;
1077 if (proto0 != IP_PROTOCOL_UDP)
1078 goto exit; /* not UDP packet */
1081 udp0 = ip4_next_header (ip40);
1083 udp0 = ip6_next_header (ip60);
1085 if (udp0->dst_port != clib_host_to_net_u16 (UDP_DST_PORT_VXLAN_GPE))
1086 goto exit; /* not VXLAN packet */
1088 /* Validate DIP against VTEPs */
1092 #ifdef CLIB_HAVE_VEC512
1093 if (!vtep4_check_vector
1094 (&ngm->vtep_table, b0, ip40, &last_vtep4, &vtep4_u512))
1096 if (!vtep4_check (&ngm->vtep_table, b0, ip40, &last_vtep4))
1098 goto exit; /* no local VTEP for VXLAN packet */
1102 if (!vtep6_check (&ngm->vtep_table, b0, ip60, &last_vtep6))
1103 goto exit; /* no local VTEP for VXLAN packet */
1107 good_udp0 = (flags0 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;
1109 /* Don't verify UDP checksum for packets with explicit zero checksum. */
1110 good_udp0 |= udp0->checksum == 0;
1112 /* Verify UDP length */
1114 ip_len0 = clib_net_to_host_u16 (ip40->length);
1116 ip_len0 = clib_net_to_host_u16 (ip60->payload_length);
1117 udp_len0 = clib_net_to_host_u16 (udp0->length);
1118 len_diff0 = ip_len0 - udp_len0;
1120 /* Verify UDP checksum */
1121 if (PREDICT_FALSE (!good_udp0))
1123 if ((flags0 & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED) == 0)
1126 flags0 = ip4_tcp_udp_validate_checksum (vm, b0);
1128 flags0 = ip6_tcp_udp_icmp_validate_checksum (vm, b0);
1130 (flags0 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;
1136 error0 = good_udp0 ? 0 : IP4_ERROR_UDP_CHECKSUM;
1137 error0 = (len_diff0 >= 0) ? error0 : IP4_ERROR_UDP_LENGTH;
1141 error0 = good_udp0 ? 0 : IP6_ERROR_UDP_CHECKSUM;
1142 error0 = (len_diff0 >= 0) ? error0 : IP6_ERROR_UDP_LENGTH;
1146 IP_VXLAN_BYPASS_NEXT_DROP : IP_VXLAN_BYPASS_NEXT_VXLAN;
1147 b0->error = error0 ? error_node->errors[error0] : 0;
1149 /* vxlan_gpe-input node expect current at VXLAN header */
1151 vlib_buffer_advance (b0,
1152 sizeof (ip4_header_t) +
1153 sizeof (udp_header_t));
1155 vlib_buffer_advance (b0,
1156 sizeof (ip6_header_t) +
1157 sizeof (udp_header_t));
1160 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1161 to_next, n_left_to_next,
1165 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1168 return frame->n_vectors;
1171 VLIB_NODE_FN (ip4_vxlan_gpe_bypass_node) (vlib_main_t * vm,
1172 vlib_node_runtime_t * node,
1173 vlib_frame_t * frame)
1175 return ip_vxlan_gpe_bypass_inline (vm, node, frame, /* is_ip4 */ 1);
1179 VLIB_REGISTER_NODE (ip4_vxlan_gpe_bypass_node) = {
1180 .name = "ip4-vxlan-gpe-bypass",
1181 .vector_size = sizeof (u32),
1183 .n_next_nodes = IP_VXLAN_BYPASS_N_NEXT,
1185 [IP_VXLAN_BYPASS_NEXT_DROP] = "error-drop",
1186 [IP_VXLAN_BYPASS_NEXT_VXLAN] = "vxlan4-gpe-input",
1189 .format_buffer = format_ip4_header,
1190 .format_trace = format_ip4_forward_next_trace,
1194 #ifndef CLIB_MARCH_VARIANT
1195 /* Dummy init function to get us linked in. */
1197 ip4_vxlan_gpe_bypass_init (vlib_main_t * vm)
1202 VLIB_INIT_FUNCTION (ip4_vxlan_gpe_bypass_init);
1203 #endif /* CLIB_MARCH_VARIANT */
1205 VLIB_NODE_FN (ip6_vxlan_gpe_bypass_node) (vlib_main_t * vm,
1206 vlib_node_runtime_t * node,
1207 vlib_frame_t * frame)
1209 return ip_vxlan_gpe_bypass_inline (vm, node, frame, /* is_ip4 */ 0);
1213 VLIB_REGISTER_NODE (ip6_vxlan_gpe_bypass_node) = {
1214 .name = "ip6-vxlan-gpe-bypass",
1215 .vector_size = sizeof (u32),
1217 .n_next_nodes = IP_VXLAN_BYPASS_N_NEXT,
1219 [IP_VXLAN_BYPASS_NEXT_DROP] = "error-drop",
1220 [IP_VXLAN_BYPASS_NEXT_VXLAN] = "vxlan6-gpe-input",
1223 .format_buffer = format_ip6_header,
1224 .format_trace = format_ip6_forward_next_trace,
1228 #ifndef CLIB_MARCH_VARIANT
1229 /* Dummy init function to get us linked in. */
1231 ip6_vxlan_gpe_bypass_init (vlib_main_t * vm)
1236 VLIB_INIT_FUNCTION (ip6_vxlan_gpe_bypass_init);
1237 #endif /* CLIB_MARCH_VARIANT */
1240 * fd.io coding-style-patch-verification: ON
1243 * eval: (c-set-style "gnu")