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>
27 vlib_node_registration_t vxlan_gpe_input_node;
30 * @brief Struct for VXLAN GPE decap packet tracing
38 } vxlan_gpe_rx_trace_t;
41 * @brief Tracing function for VXLAN GPE packet decapsulation
50 format_vxlan_gpe_rx_trace (u8 * s, va_list * args)
52 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
53 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
54 vxlan_gpe_rx_trace_t *t = va_arg (*args, vxlan_gpe_rx_trace_t *);
56 if (t->tunnel_index != ~0)
58 s = format (s, "VXLAN-GPE: tunnel %d next %d error %d", t->tunnel_index,
59 t->next_index, t->error);
63 s = format (s, "VXLAN-GPE: no tunnel next %d error %d\n", t->next_index,
70 * @brief Tracing function for VXLAN GPE packet decapsulation including length
79 format_vxlan_gpe_with_length (u8 * s, va_list * args)
81 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
82 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
89 * @brief Common processing for IPv4 and IPv6 VXLAN GPE decap dispatch functions
91 * It is worth noting that other than trivial UDP forwarding (transit), VXLAN GPE
92 * tunnels are "terminate local". This means that there is no "TX" interface for this
93 * decap case, so that field in the buffer_metadata can be "used for something else".
94 * The something else in this case is, for the IPv4/IPv6 inner-packet type case, the
95 * FIB index used to look up the inner-packet's adjacency.
97 * vnet_buffer(b0)->sw_if_index[VLIB_TX] = t0->decap_fib_index;
104 * @return from_frame->n_vectors
108 vxlan_gpe_input (vlib_main_t * vm,
109 vlib_node_runtime_t * node,
110 vlib_frame_t * from_frame, u8 is_ip4)
112 u32 n_left_from, next_index, *from, *to_next;
113 vxlan_gpe_main_t *nngm = &vxlan_gpe_main;
114 vnet_main_t *vnm = nngm->vnet_main;
115 vnet_interface_main_t *im = &vnm->interface_main;
116 u32 last_tunnel_index = ~0;
117 vxlan4_gpe_tunnel_key_t last_key4;
118 vxlan6_gpe_tunnel_key_t last_key6;
119 u32 pkts_decapsulated = 0;
120 u32 thread_index = vlib_get_thread_index ();
121 u32 stats_sw_if_index, stats_n_packets, stats_n_bytes;
124 memset (&last_key4, 0xff, sizeof (last_key4));
126 memset (&last_key6, 0xff, sizeof (last_key6));
128 from = vlib_frame_vector_args (from_frame);
129 n_left_from = from_frame->n_vectors;
131 next_index = node->cached_next_index;
132 stats_sw_if_index = node->runtime_data[0];
133 stats_n_packets = stats_n_bytes = 0;
135 while (n_left_from > 0)
139 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
141 while (n_left_from >= 4 && n_left_to_next >= 2)
144 vlib_buffer_t *b0, *b1;
146 ip4_vxlan_gpe_header_t *iuvn4_0, *iuvn4_1;
147 ip6_vxlan_gpe_header_t *iuvn6_0, *iuvn6_1;
149 u32 tunnel_index0, tunnel_index1;
150 vxlan_gpe_tunnel_t *t0, *t1;
151 vxlan4_gpe_tunnel_key_t key4_0, key4_1;
152 vxlan6_gpe_tunnel_key_t key6_0, key6_1;
154 u32 sw_if_index0, sw_if_index1, len0, len1;
156 /* Prefetch next iteration. */
158 vlib_buffer_t *p2, *p3;
160 p2 = vlib_get_buffer (vm, from[2]);
161 p3 = vlib_get_buffer (vm, from[3]);
163 vlib_prefetch_buffer_header (p2, LOAD);
164 vlib_prefetch_buffer_header (p3, LOAD);
166 CLIB_PREFETCH (p2->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
167 CLIB_PREFETCH (p3->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
179 b0 = vlib_get_buffer (vm, bi0);
180 b1 = vlib_get_buffer (vm, bi1);
184 /* udp leaves current_data pointing at the vxlan-gpe header */
185 vlib_buffer_advance (b0,
186 -(word) (sizeof (udp_header_t) +
187 sizeof (ip4_header_t)));
188 vlib_buffer_advance (b1,
189 -(word) (sizeof (udp_header_t) +
190 sizeof (ip4_header_t)));
192 iuvn4_0 = vlib_buffer_get_current (b0);
193 iuvn4_1 = vlib_buffer_get_current (b1);
195 /* pop (ip, udp, vxlan) */
196 vlib_buffer_advance (b0, sizeof (*iuvn4_0));
197 vlib_buffer_advance (b1, sizeof (*iuvn4_1));
201 /* udp leaves current_data pointing at the vxlan-gpe header */
202 vlib_buffer_advance (b0,
203 -(word) (sizeof (udp_header_t) +
204 sizeof (ip6_header_t)));
205 vlib_buffer_advance (b1,
206 -(word) (sizeof (udp_header_t) +
207 sizeof (ip6_header_t)));
209 iuvn6_0 = vlib_buffer_get_current (b0);
210 iuvn6_1 = vlib_buffer_get_current (b1);
212 /* pop (ip, udp, vxlan) */
213 vlib_buffer_advance (b0, sizeof (*iuvn6_0));
214 vlib_buffer_advance (b1, sizeof (*iuvn6_1));
225 (iuvn4_0->vxlan.protocol < VXLAN_GPE_PROTOCOL_MAX) ?
226 nngm->decap_next_node_list[iuvn4_0->vxlan.protocol] :
227 VXLAN_GPE_INPUT_NEXT_DROP;
229 (iuvn4_1->vxlan.protocol < VXLAN_GPE_PROTOCOL_MAX) ?
230 nngm->decap_next_node_list[iuvn4_1->vxlan.protocol] :
231 VXLAN_GPE_INPUT_NEXT_DROP;
233 key4_0.local = iuvn4_0->ip4.dst_address.as_u32;
234 key4_1.local = iuvn4_1->ip4.dst_address.as_u32;
236 key4_0.remote = iuvn4_0->ip4.src_address.as_u32;
237 key4_1.remote = iuvn4_1->ip4.src_address.as_u32;
239 key4_0.vni = iuvn4_0->vxlan.vni_res;
240 key4_1.vni = iuvn4_1->vxlan.vni_res;
247 next0 = (iuvn6_0->vxlan.protocol < node->n_next_nodes) ?
248 iuvn6_0->vxlan.protocol : VXLAN_GPE_INPUT_NEXT_DROP;
249 next1 = (iuvn6_1->vxlan.protocol < node->n_next_nodes) ?
250 iuvn6_1->vxlan.protocol : VXLAN_GPE_INPUT_NEXT_DROP;
252 key6_0.local.as_u64[0] = iuvn6_0->ip6.dst_address.as_u64[0];
253 key6_0.local.as_u64[1] = iuvn6_0->ip6.dst_address.as_u64[1];
254 key6_1.local.as_u64[0] = iuvn6_1->ip6.dst_address.as_u64[0];
255 key6_1.local.as_u64[1] = iuvn6_1->ip6.dst_address.as_u64[1];
257 key6_0.remote.as_u64[0] = iuvn6_0->ip6.src_address.as_u64[0];
258 key6_0.remote.as_u64[1] = iuvn6_0->ip6.src_address.as_u64[1];
259 key6_1.remote.as_u64[0] = iuvn6_1->ip6.src_address.as_u64[0];
260 key6_1.remote.as_u64[1] = iuvn6_1->ip6.src_address.as_u64[1];
262 key6_0.vni = iuvn6_0->vxlan.vni_res;
263 key6_1.vni = iuvn6_1->vxlan.vni_res;
266 /* Processing packet 0 */
269 /* Processing for key4_0 */
270 if (PREDICT_FALSE ((key4_0.as_u64[0] != last_key4.as_u64[0])
271 || (key4_0.as_u64[1] !=
272 last_key4.as_u64[1])))
274 p0 = hash_get_mem (nngm->vxlan4_gpe_tunnel_by_key, &key4_0);
278 error0 = VXLAN_GPE_ERROR_NO_SUCH_TUNNEL;
282 last_key4.as_u64[0] = key4_0.as_u64[0];
283 last_key4.as_u64[1] = key4_0.as_u64[1];
284 tunnel_index0 = last_tunnel_index = p0[0];
287 tunnel_index0 = last_tunnel_index;
292 (iuvn6_0->vxlan.protocol < VXLAN_GPE_PROTOCOL_MAX) ?
293 nngm->decap_next_node_list[iuvn6_0->vxlan.protocol] :
294 VXLAN_GPE_INPUT_NEXT_DROP;
296 (iuvn6_1->vxlan.protocol < VXLAN_GPE_PROTOCOL_MAX) ?
297 nngm->decap_next_node_list[iuvn6_1->vxlan.protocol] :
298 VXLAN_GPE_INPUT_NEXT_DROP;
300 key6_0.local.as_u64[0] = iuvn6_0->ip6.dst_address.as_u64[0];
301 key6_0.local.as_u64[1] = iuvn6_0->ip6.dst_address.as_u64[1];
302 key6_1.local.as_u64[0] = iuvn6_1->ip6.dst_address.as_u64[0];
303 key6_1.local.as_u64[1] = iuvn6_1->ip6.dst_address.as_u64[1];
305 key6_0.remote.as_u64[0] = iuvn6_0->ip6.src_address.as_u64[0];
306 key6_0.remote.as_u64[1] = iuvn6_0->ip6.src_address.as_u64[1];
307 key6_1.remote.as_u64[0] = iuvn6_1->ip6.src_address.as_u64[0];
308 key6_1.remote.as_u64[1] = iuvn6_1->ip6.src_address.as_u64[1];
310 key6_0.vni = iuvn6_0->vxlan.vni_res;
311 key6_1.vni = iuvn6_1->vxlan.vni_res;
313 /* Processing for key6_0 */
315 (memcmp (&key6_0, &last_key6, sizeof (last_key6)) != 0))
317 p0 = hash_get_mem (nngm->vxlan6_gpe_tunnel_by_key, &key6_0);
321 error0 = VXLAN_GPE_ERROR_NO_SUCH_TUNNEL;
325 memcpy (&last_key6, &key6_0, sizeof (key6_0));
326 tunnel_index0 = last_tunnel_index = p0[0];
329 tunnel_index0 = last_tunnel_index;
332 t0 = pool_elt_at_index (nngm->tunnels, tunnel_index0);
335 sw_if_index0 = t0->sw_if_index;
336 len0 = vlib_buffer_length_in_chain (vm, b0);
338 /* Required to make the l2 tag push / pop code work on l2 subifs */
339 vnet_update_l2_len (b0);
341 /* Set packet input sw_if_index to unicast VXLAN tunnel for learning */
342 vnet_buffer (b0)->sw_if_index[VLIB_RX] = t0->sw_if_index;
345 * ip[46] lookup in the configured FIB
347 vnet_buffer (b0)->sw_if_index[VLIB_TX] = t0->decap_fib_index;
350 stats_n_packets += 1;
351 stats_n_bytes += len0;
353 if (PREDICT_FALSE (sw_if_index0 != stats_sw_if_index))
355 stats_n_packets -= 1;
356 stats_n_bytes -= len0;
358 vlib_increment_combined_counter (im->combined_sw_if_counters +
359 VNET_INTERFACE_COUNTER_RX,
365 stats_n_bytes = len0;
366 stats_sw_if_index = sw_if_index0;
369 trace0:b0->error = error0 ? node->errors[error0] : 0;
371 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
373 vxlan_gpe_rx_trace_t *tr =
374 vlib_add_trace (vm, node, b0, sizeof (*tr));
375 tr->next_index = next0;
377 tr->tunnel_index = tunnel_index0;
380 /* Process packet 1 */
383 /* Processing for key4_1 */
384 if (PREDICT_FALSE ((key4_1.as_u64[0] != last_key4.as_u64[0])
385 || (key4_1.as_u64[1] !=
386 last_key4.as_u64[1])))
388 p1 = hash_get_mem (nngm->vxlan4_gpe_tunnel_by_key, &key4_1);
392 error1 = VXLAN_GPE_ERROR_NO_SUCH_TUNNEL;
396 last_key4.as_u64[0] = key4_1.as_u64[0];
397 last_key4.as_u64[1] = key4_1.as_u64[1];
398 tunnel_index1 = last_tunnel_index = p1[0];
401 tunnel_index1 = last_tunnel_index;
405 /* Processing for key6_1 */
407 (memcmp (&key6_1, &last_key6, sizeof (last_key6)) != 0))
409 p1 = hash_get_mem (nngm->vxlan6_gpe_tunnel_by_key, &key6_1);
413 error1 = VXLAN_GPE_ERROR_NO_SUCH_TUNNEL;
417 memcpy (&last_key6, &key6_1, sizeof (key6_1));
418 tunnel_index1 = last_tunnel_index = p1[0];
421 tunnel_index1 = last_tunnel_index;
424 t1 = pool_elt_at_index (nngm->tunnels, tunnel_index1);
426 sw_if_index1 = t1->sw_if_index;
427 len1 = vlib_buffer_length_in_chain (vm, b1);
429 /* Required to make the l2 tag push / pop code work on l2 subifs */
430 vnet_update_l2_len (b1);
432 /* Set packet input sw_if_index to unicast VXLAN tunnel for learning */
433 vnet_buffer (b1)->sw_if_index[VLIB_RX] = t1->sw_if_index;
436 * ip[46] lookup in the configured FIB
438 vnet_buffer (b1)->sw_if_index[VLIB_TX] = t1->decap_fib_index;
441 stats_n_packets += 1;
442 stats_n_bytes += len1;
444 /* Batch stats increment on the same vxlan tunnel so counter
445 is not incremented per packet */
446 if (PREDICT_FALSE (sw_if_index1 != stats_sw_if_index))
448 stats_n_packets -= 1;
449 stats_n_bytes -= len1;
451 vlib_increment_combined_counter (im->combined_sw_if_counters +
452 VNET_INTERFACE_COUNTER_RX,
458 stats_n_bytes = len1;
459 stats_sw_if_index = sw_if_index1;
461 vnet_buffer (b1)->sw_if_index[VLIB_TX] = t1->decap_fib_index;
463 trace1:b1->error = error1 ? node->errors[error1] : 0;
465 if (PREDICT_FALSE (b1->flags & VLIB_BUFFER_IS_TRACED))
467 vxlan_gpe_rx_trace_t *tr =
468 vlib_add_trace (vm, node, b1, sizeof (*tr));
469 tr->next_index = next1;
471 tr->tunnel_index = tunnel_index1;
474 vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
475 n_left_to_next, bi0, bi1, next0,
479 while (n_left_from > 0 && n_left_to_next > 0)
484 ip4_vxlan_gpe_header_t *iuvn4_0;
485 ip6_vxlan_gpe_header_t *iuvn6_0;
488 vxlan_gpe_tunnel_t *t0;
489 vxlan4_gpe_tunnel_key_t key4_0;
490 vxlan6_gpe_tunnel_key_t key6_0;
492 u32 sw_if_index0, len0;
501 b0 = vlib_get_buffer (vm, bi0);
505 /* udp leaves current_data pointing at the vxlan-gpe header */
506 vlib_buffer_advance (b0,
507 -(word) (sizeof (udp_header_t) +
508 sizeof (ip4_header_t)));
510 iuvn4_0 = vlib_buffer_get_current (b0);
512 /* pop (ip, udp, vxlan) */
513 vlib_buffer_advance (b0, sizeof (*iuvn4_0));
517 /* udp leaves current_data pointing at the vxlan-gpe header */
518 vlib_buffer_advance (b0,
519 -(word) (sizeof (udp_header_t) +
520 sizeof (ip6_header_t)));
522 iuvn6_0 = vlib_buffer_get_current (b0);
524 /* pop (ip, udp, vxlan) */
525 vlib_buffer_advance (b0, sizeof (*iuvn6_0));
534 (iuvn4_0->vxlan.protocol < VXLAN_GPE_PROTOCOL_MAX) ?
535 nngm->decap_next_node_list[iuvn4_0->vxlan.protocol] :
536 VXLAN_GPE_INPUT_NEXT_DROP;
538 key4_0.local = iuvn4_0->ip4.dst_address.as_u32;
539 key4_0.remote = iuvn4_0->ip4.src_address.as_u32;
540 key4_0.vni = iuvn4_0->vxlan.vni_res;
543 /* Processing for key4_0 */
544 if (PREDICT_FALSE ((key4_0.as_u64[0] != last_key4.as_u64[0])
545 || (key4_0.as_u64[1] !=
546 last_key4.as_u64[1])))
548 p0 = hash_get_mem (nngm->vxlan4_gpe_tunnel_by_key, &key4_0);
552 error0 = VXLAN_GPE_ERROR_NO_SUCH_TUNNEL;
556 last_key4.as_u64[0] = key4_0.as_u64[0];
557 last_key4.as_u64[1] = key4_0.as_u64[1];
558 tunnel_index0 = last_tunnel_index = p0[0];
561 tunnel_index0 = last_tunnel_index;
566 (iuvn6_0->vxlan.protocol < VXLAN_GPE_PROTOCOL_MAX) ?
567 nngm->decap_next_node_list[iuvn6_0->vxlan.protocol] :
568 VXLAN_GPE_INPUT_NEXT_DROP;
570 key6_0.local.as_u64[0] = iuvn6_0->ip6.dst_address.as_u64[0];
571 key6_0.local.as_u64[1] = iuvn6_0->ip6.dst_address.as_u64[1];
572 key6_0.remote.as_u64[0] = iuvn6_0->ip6.src_address.as_u64[0];
573 key6_0.remote.as_u64[1] = iuvn6_0->ip6.src_address.as_u64[1];
574 key6_0.vni = iuvn6_0->vxlan.vni_res;
576 /* Processing for key6_0 */
578 (memcmp (&key6_0, &last_key6, sizeof (last_key6)) != 0))
580 p0 = hash_get_mem (nngm->vxlan6_gpe_tunnel_by_key, &key6_0);
584 error0 = VXLAN_GPE_ERROR_NO_SUCH_TUNNEL;
588 memcpy (&last_key6, &key6_0, sizeof (key6_0));
589 tunnel_index0 = last_tunnel_index = p0[0];
592 tunnel_index0 = last_tunnel_index;
595 t0 = pool_elt_at_index (nngm->tunnels, tunnel_index0);
598 sw_if_index0 = t0->sw_if_index;
599 len0 = vlib_buffer_length_in_chain (vm, b0);
601 /* Required to make the l2 tag push / pop code work on l2 subifs */
602 vnet_update_l2_len (b0);
604 /* Set packet input sw_if_index to unicast VXLAN tunnel for learning */
605 vnet_buffer (b0)->sw_if_index[VLIB_RX] = t0->sw_if_index;
608 * ip[46] lookup in the configured FIB
610 vnet_buffer (b0)->sw_if_index[VLIB_TX] = t0->decap_fib_index;
613 stats_n_packets += 1;
614 stats_n_bytes += len0;
616 /* Batch stats increment on the same vxlan-gpe tunnel so counter
617 is not incremented per packet */
618 if (PREDICT_FALSE (sw_if_index0 != stats_sw_if_index))
620 stats_n_packets -= 1;
621 stats_n_bytes -= len0;
623 vlib_increment_combined_counter (im->combined_sw_if_counters +
624 VNET_INTERFACE_COUNTER_RX,
630 stats_n_bytes = len0;
631 stats_sw_if_index = sw_if_index0;
634 trace00:b0->error = error0 ? node->errors[error0] : 0;
636 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
638 vxlan_gpe_rx_trace_t *tr =
639 vlib_add_trace (vm, node, b0, sizeof (*tr));
640 tr->next_index = next0;
642 tr->tunnel_index = tunnel_index0;
644 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
645 n_left_to_next, bi0, next0);
648 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
650 vlib_node_increment_counter (vm, vxlan_gpe_input_node.index,
651 VXLAN_GPE_ERROR_DECAPSULATED,
653 /* Increment any remaining batch stats */
656 vlib_increment_combined_counter (im->combined_sw_if_counters +
657 VNET_INTERFACE_COUNTER_RX,
658 thread_index, stats_sw_if_index,
659 stats_n_packets, stats_n_bytes);
660 node->runtime_data[0] = stats_sw_if_index;
662 return from_frame->n_vectors;
666 * @brief Graph processing dispatch function for IPv4 VXLAN GPE
668 * @node vxlan4-gpe-input
673 * @return from_frame->n_vectors
677 vxlan4_gpe_input (vlib_main_t * vm, vlib_node_runtime_t * node,
678 vlib_frame_t * from_frame)
680 return vxlan_gpe_input (vm, node, from_frame, /* is_ip4 */ 1);
685 vxlan_gpe_register_decap_protocol (u8 protocol_id, uword next_node_index)
687 vxlan_gpe_main_t *hm = &vxlan_gpe_main;
688 hm->decap_next_node_list[protocol_id] = next_node_index;
693 vxlan_gpe_unregister_decap_protocol (u8 protocol_id, uword next_node_index)
695 vxlan_gpe_main_t *hm = &vxlan_gpe_main;
696 hm->decap_next_node_list[protocol_id] = VXLAN_GPE_INPUT_NEXT_DROP;
702 * @brief Graph processing dispatch function for IPv6 VXLAN GPE
704 * @node vxlan6-gpe-input
709 * @return from_frame->n_vectors - uword
713 vxlan6_gpe_input (vlib_main_t * vm, vlib_node_runtime_t * node,
714 vlib_frame_t * from_frame)
716 return vxlan_gpe_input (vm, node, from_frame, /* is_ip4 */ 0);
720 * @brief VXLAN GPE error strings
722 static char *vxlan_gpe_error_strings[] = {
723 #define vxlan_gpe_error(n,s) s,
724 #include <vnet/vxlan-gpe/vxlan_gpe_error.def>
725 #undef vxlan_gpe_error
730 VLIB_REGISTER_NODE (vxlan4_gpe_input_node) = {
731 .function = vxlan4_gpe_input,
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 // $$$$ .unformat_buffer = unformat_vxlan_gpe_header,
752 VLIB_NODE_FUNCTION_MULTIARCH (vxlan4_gpe_input_node, vxlan4_gpe_input);
755 VLIB_REGISTER_NODE (vxlan6_gpe_input_node) = {
756 .function = vxlan6_gpe_input,
757 .name = "vxlan6-gpe-input",
758 /* Takes a vector of packets. */
759 .vector_size = sizeof (u32),
760 .type = VLIB_NODE_TYPE_INTERNAL,
761 .n_errors = ARRAY_LEN(vxlan_gpe_error_strings),
762 .error_strings = vxlan_gpe_error_strings,
764 .n_next_nodes = VXLAN_GPE_INPUT_N_NEXT,
766 #define _(s,n) [VXLAN_GPE_INPUT_NEXT_##s] = n,
767 foreach_vxlan_gpe_input_next
771 .format_buffer = format_vxlan_gpe_with_length,
772 .format_trace = format_vxlan_gpe_rx_trace,
773 // $$$$ .unformat_buffer = unformat_vxlan_gpe_header,
777 VLIB_NODE_FUNCTION_MULTIARCH (vxlan6_gpe_input_node, vxlan6_gpe_input);
780 IP_VXLAN_BYPASS_NEXT_DROP,
781 IP_VXLAN_BYPASS_NEXT_VXLAN,
782 IP_VXLAN_BYPASS_N_NEXT,
783 } ip_vxan_bypass_next_t;
786 ip_vxlan_gpe_bypass_inline (vlib_main_t * vm,
787 vlib_node_runtime_t * node,
788 vlib_frame_t * frame, u32 is_ip4)
790 vxlan_gpe_main_t *ngm = &vxlan_gpe_main;
791 u32 *from, *to_next, n_left_from, n_left_to_next, next_index;
792 vlib_node_runtime_t *error_node =
793 vlib_node_get_runtime (vm, ip4_input_node.index);
794 ip4_address_t addr4; /* last IPv4 address matching a local VTEP address */
795 ip6_address_t addr6; /* last IPv6 address matching a local VTEP address */
797 from = vlib_frame_vector_args (frame);
798 n_left_from = frame->n_vectors;
799 next_index = node->cached_next_index;
801 if (node->flags & VLIB_NODE_FLAG_TRACE)
802 ip4_forward_next_trace (vm, node, frame, VLIB_TX);
807 ip6_address_set_zero (&addr6);
809 while (n_left_from > 0)
811 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
813 while (n_left_from >= 4 && n_left_to_next >= 2)
815 vlib_buffer_t *b0, *b1;
816 ip4_header_t *ip40, *ip41;
817 ip6_header_t *ip60, *ip61;
818 udp_header_t *udp0, *udp1;
819 u32 bi0, ip_len0, udp_len0, flags0, next0;
820 u32 bi1, ip_len1, udp_len1, flags1, next1;
821 i32 len_diff0, len_diff1;
822 u8 error0, good_udp0, proto0;
823 u8 error1, good_udp1, proto1;
825 /* Prefetch next iteration. */
827 vlib_buffer_t *p2, *p3;
829 p2 = vlib_get_buffer (vm, from[2]);
830 p3 = vlib_get_buffer (vm, from[3]);
832 vlib_prefetch_buffer_header (p2, LOAD);
833 vlib_prefetch_buffer_header (p3, LOAD);
835 CLIB_PREFETCH (p2->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
836 CLIB_PREFETCH (p3->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
839 bi0 = to_next[0] = from[0];
840 bi1 = to_next[1] = from[1];
846 b0 = vlib_get_buffer (vm, bi0);
847 b1 = vlib_get_buffer (vm, bi1);
850 ip40 = vlib_buffer_get_current (b0);
851 ip41 = vlib_buffer_get_current (b1);
855 ip60 = vlib_buffer_get_current (b0);
856 ip61 = vlib_buffer_get_current (b1);
859 /* Setup packet for next IP feature */
860 vnet_feature_next (vnet_buffer (b0)->sw_if_index[VLIB_RX], &next0,
862 vnet_feature_next (vnet_buffer (b1)->sw_if_index[VLIB_RX], &next1,
867 proto0 = ip40->protocol;
868 proto1 = ip41->protocol;
872 proto0 = ip60->protocol;
873 proto1 = ip61->protocol;
876 /* Process packet 0 */
877 if (proto0 != IP_PROTOCOL_UDP)
878 goto exit0; /* not UDP packet */
881 udp0 = ip4_next_header (ip40);
883 udp0 = ip6_next_header (ip60);
885 if (udp0->dst_port != clib_host_to_net_u16 (UDP_DST_PORT_VXLAN_GPE))
886 goto exit0; /* not VXLAN packet */
888 /* Validate DIP against VTEPs */
891 if (addr4.as_u32 != ip40->dst_address.as_u32)
893 if (!hash_get (ngm->vtep4, ip40->dst_address.as_u32))
894 goto exit0; /* no local VTEP for VXLAN packet */
895 addr4 = ip40->dst_address;
900 if (!ip6_address_is_equal (&addr6, &ip60->dst_address))
902 if (!hash_get_mem (ngm->vtep6, &ip60->dst_address))
903 goto exit0; /* no local VTEP for VXLAN packet */
904 addr6 = ip60->dst_address;
909 good_udp0 = (flags0 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;
911 /* Don't verify UDP checksum for packets with explicit zero checksum. */
912 good_udp0 |= udp0->checksum == 0;
914 /* Verify UDP length */
916 ip_len0 = clib_net_to_host_u16 (ip40->length);
918 ip_len0 = clib_net_to_host_u16 (ip60->payload_length);
919 udp_len0 = clib_net_to_host_u16 (udp0->length);
920 len_diff0 = ip_len0 - udp_len0;
922 /* Verify UDP checksum */
923 if (PREDICT_FALSE (!good_udp0))
925 if ((flags0 & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED) == 0)
928 flags0 = ip4_tcp_udp_validate_checksum (vm, b0);
930 flags0 = ip6_tcp_udp_icmp_validate_checksum (vm, b0);
932 (flags0 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;
938 error0 = good_udp0 ? 0 : IP4_ERROR_UDP_CHECKSUM;
939 error0 = (len_diff0 >= 0) ? error0 : IP4_ERROR_UDP_LENGTH;
943 error0 = good_udp0 ? 0 : IP6_ERROR_UDP_CHECKSUM;
944 error0 = (len_diff0 >= 0) ? error0 : IP6_ERROR_UDP_LENGTH;
948 IP_VXLAN_BYPASS_NEXT_DROP : IP_VXLAN_BYPASS_NEXT_VXLAN;
949 b0->error = error0 ? error_node->errors[error0] : 0;
951 /* vxlan_gpe-input node expect current at VXLAN header */
953 vlib_buffer_advance (b0,
954 sizeof (ip4_header_t) +
955 sizeof (udp_header_t));
957 vlib_buffer_advance (b0,
958 sizeof (ip6_header_t) +
959 sizeof (udp_header_t));
962 /* Process packet 1 */
963 if (proto1 != IP_PROTOCOL_UDP)
964 goto exit1; /* not UDP packet */
967 udp1 = ip4_next_header (ip41);
969 udp1 = ip6_next_header (ip61);
971 if (udp1->dst_port != clib_host_to_net_u16 (UDP_DST_PORT_VXLAN_GPE))
972 goto exit1; /* not VXLAN packet */
974 /* Validate DIP against VTEPs */
977 if (addr4.as_u32 != ip41->dst_address.as_u32)
979 if (!hash_get (ngm->vtep4, ip41->dst_address.as_u32))
980 goto exit1; /* no local VTEP for VXLAN packet */
981 addr4 = ip41->dst_address;
986 if (!ip6_address_is_equal (&addr6, &ip61->dst_address))
988 if (!hash_get_mem (ngm->vtep6, &ip61->dst_address))
989 goto exit1; /* no local VTEP for VXLAN packet */
990 addr6 = ip61->dst_address;
995 good_udp1 = (flags1 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;
997 /* Don't verify UDP checksum for packets with explicit zero checksum. */
998 good_udp1 |= udp1->checksum == 0;
1000 /* Verify UDP length */
1002 ip_len1 = clib_net_to_host_u16 (ip41->length);
1004 ip_len1 = clib_net_to_host_u16 (ip61->payload_length);
1005 udp_len1 = clib_net_to_host_u16 (udp1->length);
1006 len_diff1 = ip_len1 - udp_len1;
1008 /* Verify UDP checksum */
1009 if (PREDICT_FALSE (!good_udp1))
1011 if ((flags1 & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED) == 0)
1014 flags1 = ip4_tcp_udp_validate_checksum (vm, b1);
1016 flags1 = ip6_tcp_udp_icmp_validate_checksum (vm, b1);
1018 (flags1 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;
1024 error1 = good_udp1 ? 0 : IP4_ERROR_UDP_CHECKSUM;
1025 error1 = (len_diff1 >= 0) ? error1 : IP4_ERROR_UDP_LENGTH;
1029 error1 = good_udp1 ? 0 : IP6_ERROR_UDP_CHECKSUM;
1030 error1 = (len_diff1 >= 0) ? error1 : IP6_ERROR_UDP_LENGTH;
1034 IP_VXLAN_BYPASS_NEXT_DROP : IP_VXLAN_BYPASS_NEXT_VXLAN;
1035 b1->error = error1 ? error_node->errors[error1] : 0;
1037 /* vxlan_gpe-input node expect current at VXLAN header */
1039 vlib_buffer_advance (b1,
1040 sizeof (ip4_header_t) +
1041 sizeof (udp_header_t));
1043 vlib_buffer_advance (b1,
1044 sizeof (ip6_header_t) +
1045 sizeof (udp_header_t));
1048 vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
1049 to_next, n_left_to_next,
1050 bi0, bi1, next0, next1);
1053 while (n_left_from > 0 && n_left_to_next > 0)
1059 u32 bi0, ip_len0, udp_len0, flags0, next0;
1061 u8 error0, good_udp0, proto0;
1063 bi0 = to_next[0] = from[0];
1067 n_left_to_next -= 1;
1069 b0 = vlib_get_buffer (vm, bi0);
1071 ip40 = vlib_buffer_get_current (b0);
1073 ip60 = vlib_buffer_get_current (b0);
1075 /* Setup packet for next IP feature */
1076 vnet_feature_next (vnet_buffer (b0)->sw_if_index[VLIB_RX], &next0,
1080 proto0 = ip40->protocol;
1082 proto0 = ip60->protocol;
1084 if (proto0 != IP_PROTOCOL_UDP)
1085 goto exit; /* not UDP packet */
1088 udp0 = ip4_next_header (ip40);
1090 udp0 = ip6_next_header (ip60);
1092 if (udp0->dst_port != clib_host_to_net_u16 (UDP_DST_PORT_VXLAN_GPE))
1093 goto exit; /* not VXLAN packet */
1095 /* Validate DIP against VTEPs */
1098 if (addr4.as_u32 != ip40->dst_address.as_u32)
1100 if (!hash_get (ngm->vtep4, ip40->dst_address.as_u32))
1101 goto exit; /* no local VTEP for VXLAN packet */
1102 addr4 = ip40->dst_address;
1107 if (!ip6_address_is_equal (&addr6, &ip60->dst_address))
1109 if (!hash_get_mem (ngm->vtep6, &ip60->dst_address))
1110 goto exit; /* no local VTEP for VXLAN packet */
1111 addr6 = ip60->dst_address;
1116 good_udp0 = (flags0 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;
1118 /* Don't verify UDP checksum for packets with explicit zero checksum. */
1119 good_udp0 |= udp0->checksum == 0;
1121 /* Verify UDP length */
1123 ip_len0 = clib_net_to_host_u16 (ip40->length);
1125 ip_len0 = clib_net_to_host_u16 (ip60->payload_length);
1126 udp_len0 = clib_net_to_host_u16 (udp0->length);
1127 len_diff0 = ip_len0 - udp_len0;
1129 /* Verify UDP checksum */
1130 if (PREDICT_FALSE (!good_udp0))
1132 if ((flags0 & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED) == 0)
1135 flags0 = ip4_tcp_udp_validate_checksum (vm, b0);
1137 flags0 = ip6_tcp_udp_icmp_validate_checksum (vm, b0);
1139 (flags0 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;
1145 error0 = good_udp0 ? 0 : IP4_ERROR_UDP_CHECKSUM;
1146 error0 = (len_diff0 >= 0) ? error0 : IP4_ERROR_UDP_LENGTH;
1150 error0 = good_udp0 ? 0 : IP6_ERROR_UDP_CHECKSUM;
1151 error0 = (len_diff0 >= 0) ? error0 : IP6_ERROR_UDP_LENGTH;
1155 IP_VXLAN_BYPASS_NEXT_DROP : IP_VXLAN_BYPASS_NEXT_VXLAN;
1156 b0->error = error0 ? error_node->errors[error0] : 0;
1158 /* vxlan_gpe-input node expect current at VXLAN header */
1160 vlib_buffer_advance (b0,
1161 sizeof (ip4_header_t) +
1162 sizeof (udp_header_t));
1164 vlib_buffer_advance (b0,
1165 sizeof (ip6_header_t) +
1166 sizeof (udp_header_t));
1169 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1170 to_next, n_left_to_next,
1174 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1177 return frame->n_vectors;
1181 ip4_vxlan_gpe_bypass (vlib_main_t * vm,
1182 vlib_node_runtime_t * node, vlib_frame_t * frame)
1184 return ip_vxlan_gpe_bypass_inline (vm, node, frame, /* is_ip4 */ 1);
1188 VLIB_REGISTER_NODE (ip4_vxlan_gpe_bypass_node) = {
1189 .function = ip4_vxlan_gpe_bypass,
1190 .name = "ip4-vxlan-gpe-bypass",
1191 .vector_size = sizeof (u32),
1193 .n_next_nodes = IP_VXLAN_BYPASS_N_NEXT,
1195 [IP_VXLAN_BYPASS_NEXT_DROP] = "error-drop",
1196 [IP_VXLAN_BYPASS_NEXT_VXLAN] = "vxlan4-gpe-input",
1199 .format_buffer = format_ip4_header,
1200 .format_trace = format_ip4_forward_next_trace,
1204 VLIB_NODE_FUNCTION_MULTIARCH (ip4_vxlan_gpe_bypass_node, ip4_vxlan_gpe_bypass)
1205 /* Dummy init function to get us linked in. */
1206 clib_error_t *ip4_vxlan_gpe_bypass_init (vlib_main_t * vm)
1211 VLIB_INIT_FUNCTION (ip4_vxlan_gpe_bypass_init);
1214 ip6_vxlan_gpe_bypass (vlib_main_t * vm,
1215 vlib_node_runtime_t * node, vlib_frame_t * frame)
1217 return ip_vxlan_gpe_bypass_inline (vm, node, frame, /* is_ip4 */ 0);
1221 VLIB_REGISTER_NODE (ip6_vxlan_gpe_bypass_node) = {
1222 .function = ip6_vxlan_gpe_bypass,
1223 .name = "ip6-vxlan-gpe-bypass",
1224 .vector_size = sizeof (u32),
1226 .n_next_nodes = IP_VXLAN_BYPASS_N_NEXT,
1228 [IP_VXLAN_BYPASS_NEXT_DROP] = "error-drop",
1229 [IP_VXLAN_BYPASS_NEXT_VXLAN] = "vxlan6-gpe-input",
1232 .format_buffer = format_ip6_header,
1233 .format_trace = format_ip6_forward_next_trace,
1237 VLIB_NODE_FUNCTION_MULTIARCH (ip6_vxlan_gpe_bypass_node, ip6_vxlan_gpe_bypass)
1238 /* Dummy init function to get us linked in. */
1239 clib_error_t *ip6_vxlan_gpe_bypass_init (vlib_main_t * vm)
1244 VLIB_INIT_FUNCTION (ip6_vxlan_gpe_bypass_init);
1247 * fd.io coding-style-patch-verification: ON
1250 * eval: (c-set-style "gnu")