2 * Copyright (c) 2018 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
16 #include <plugins/gbp/gbp.h>
17 #include <plugins/gbp/gbp_learn.h>
18 #include <plugins/gbp/gbp_bridge_domain.h>
19 #include <vlibmemory/api.h>
21 #include <vnet/util/throttle.h>
22 #include <vnet/l2/l2_input.h>
23 #include <vnet/fib/fib_table.h>
24 #include <vnet/vxlan-gbp/vxlan_gbp_packet.h>
25 #include <vnet/ethernet/arp_packet.h>
27 #define GBP_LEARN_DBG(...) \
28 vlib_log_debug (gbp_learn_main.gl_logger, __VA_ARGS__);
30 #define foreach_gbp_learn \
35 #define _(sym,str) GBP_LEARN_ERROR_##sym,
41 static char *gbp_learn_error_strings[] = {
42 #define _(sym,string) string,
49 #define _(sym,str) GBP_LEARN_NEXT_##sym,
55 typedef struct gbp_learn_l2_t_
62 ip46_address_t outer_src;
63 ip46_address_t outer_dst;
68 gbp_learn_l2_cp (const gbp_learn_l2_t * gl2)
70 ip46_address_t *ips = NULL;
72 GBP_LEARN_DBG ("L2 EP: %U %U, %d",
73 format_mac_address_t, &gl2->mac,
74 format_ip46_address, &gl2->ip, IP46_TYPE_ANY, gl2->sclass);
76 if (!ip46_address_is_zero (&gl2->ip))
77 vec_add1 (ips, gl2->ip);
80 * flip the source and dst, since that's how it was received, this API
83 gbp_endpoint_update_and_lock (GBP_ENDPOINT_SRC_DP,
84 gl2->sw_if_index, ips,
85 &gl2->mac, INDEX_INVALID,
86 INDEX_INVALID, gl2->sclass,
87 (GBP_ENDPOINT_FLAG_LEARNT |
88 GBP_ENDPOINT_FLAG_REMOTE),
89 &gl2->outer_dst, &gl2->outer_src, NULL);
94 gbp_learn_l2_ip4_dp (const u8 * mac, const ip4_address_t * ip,
95 u32 bd_index, u32 sw_if_index, sclass_t sclass,
96 const ip4_address_t * outer_src,
97 const ip4_address_t * outer_dst)
99 gbp_learn_l2_t gl2 = {
100 .sw_if_index = sw_if_index,
101 .bd_index = bd_index,
104 .outer_src.ip4 = *outer_src,
105 .outer_dst.ip4 = *outer_dst,
107 mac_address_from_bytes (&gl2.mac, mac);
109 vl_api_rpc_call_main_thread (gbp_learn_l2_cp, (u8 *) & gl2, sizeof (gl2));
113 gbp_learn_l2_ip6_dp (const u8 * mac, const ip6_address_t * ip,
114 u32 bd_index, u32 sw_if_index, sclass_t sclass,
115 const ip4_address_t * outer_src,
116 const ip4_address_t * outer_dst)
118 gbp_learn_l2_t gl2 = {
119 .sw_if_index = sw_if_index,
120 .bd_index = bd_index,
123 .outer_src.ip4 = *outer_src,
124 .outer_dst.ip4 = *outer_dst,
126 mac_address_from_bytes (&gl2.mac, mac);
128 vl_api_rpc_call_main_thread (gbp_learn_l2_cp, (u8 *) & gl2, sizeof (gl2));
132 gbp_learn_l2_dp (const u8 * mac, u32 bd_index, u32 sw_if_index,
134 const ip4_address_t * outer_src,
135 const ip4_address_t * outer_dst)
137 gbp_learn_l2_t gl2 = {
138 .sw_if_index = sw_if_index,
139 .bd_index = bd_index,
141 .outer_src.ip4 = *outer_src,
142 .outer_dst.ip4 = *outer_dst,
144 mac_address_from_bytes (&gl2.mac, mac);
146 vl_api_rpc_call_main_thread (gbp_learn_l2_cp, (u8 *) & gl2, sizeof (gl2));
150 * per-packet trace data
152 typedef struct gbp_learn_l2_trace_t_
154 /* per-pkt trace data */
161 gbp_bridge_domain_flags_t gb_flags;
162 } gbp_learn_l2_trace_t;
165 gbp_learn_get_outer (const ethernet_header_t * eh0,
166 ip4_address_t * outer_src, ip4_address_t * outer_dst)
171 /* rewind back to the ivxlan header */
173 buff -= (sizeof (vxlan_gbp_header_t) +
174 sizeof (udp_header_t) + sizeof (ip4_header_t));
176 ip0 = (ip4_header_t *) buff;
178 *outer_src = ip0->src_address;
179 *outer_dst = ip0->dst_address;
182 VLIB_NODE_FN (gbp_learn_l2_node) (vlib_main_t * vm,
183 vlib_node_runtime_t * node,
184 vlib_frame_t * frame)
186 u32 n_left_from, *from, *to_next, next_index, thread_index, seed;
187 gbp_learn_main_t *glm;
190 glm = &gbp_learn_main;
192 n_left_from = frame->n_vectors;
193 from = vlib_frame_vector_args (frame);
194 time_now = vlib_time_now (vm);
195 thread_index = vm->thread_index;
197 seed = throttle_seed (&glm->gl_l2_throttle, thread_index, time_now);
199 while (n_left_from > 0)
203 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
205 while (n_left_from > 0 && n_left_to_next > 0)
207 ip4_address_t outer_src, outer_dst;
208 const ethernet_header_t *eh0;
209 u32 bi0, sw_if_index0, t0;
210 gbp_bridge_domain_t *gb0;
211 gbp_learn_next_t next0;
216 next0 = GBP_LEARN_NEXT_DROP;
224 b0 = vlib_get_buffer (vm, bi0);
225 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
227 eh0 = vlib_buffer_get_current (b0);
228 sclass0 = vnet_buffer2 (b0)->gbp.sclass;
230 next0 = vnet_l2_feature_next (b0, glm->gl_l2_input_feat_next,
231 L2INPUT_FEAT_GBP_LEARN);
233 ge0 = gbp_endpoint_find_mac (eh0->src_address,
234 vnet_buffer (b0)->l2.bd_index);
236 gbp_bridge_domain_get_by_bd_index (vnet_buffer (b0)->l2.bd_index);
238 if ((vnet_buffer2 (b0)->gbp.flags & VXLAN_GBP_GPFLAGS_D) ||
239 (gb0->gb_flags & GBP_BD_FLAG_DO_NOT_LEARN))
246 * check for new EP or a moved EP
248 if (NULL == ge0 || ge0->ge_fwd.gef_itf != sw_if_index0)
252 * use the last 4 bytes of the mac address as the hash for the EP
254 t0 = throttle_check (&glm->gl_l2_throttle, thread_index,
255 *((u32 *) (eh0->src_address + 2)), seed);
258 gbp_learn_get_outer (eh0, &outer_src, &outer_dst);
260 if (outer_src.as_u32 == 0 || outer_dst.as_u32 == 0)
266 switch (clib_net_to_host_u16 (eh0->type))
268 case ETHERNET_TYPE_IP4:
270 const ip4_header_t *ip0;
272 ip0 = (ip4_header_t *) (eh0 + 1);
274 gbp_learn_l2_ip4_dp (eh0->src_address,
276 vnet_buffer (b0)->l2.bd_index,
277 sw_if_index0, sclass0,
278 &outer_src, &outer_dst);
282 case ETHERNET_TYPE_IP6:
284 const ip6_header_t *ip0;
286 ip0 = (ip6_header_t *) (eh0 + 1);
288 gbp_learn_l2_ip6_dp (eh0->src_address,
290 vnet_buffer (b0)->l2.bd_index,
291 sw_if_index0, sclass0,
292 &outer_src, &outer_dst);
296 case ETHERNET_TYPE_ARP:
298 const ethernet_arp_header_t *arp0;
300 arp0 = (ethernet_arp_header_t *) (eh0 + 1);
302 gbp_learn_l2_ip4_dp (eh0->src_address,
303 &arp0->ip4_over_ethernet[0].ip4,
304 vnet_buffer (b0)->l2.bd_index,
305 sw_if_index0, sclass0,
306 &outer_src, &outer_dst);
310 gbp_learn_l2_dp (eh0->src_address,
311 vnet_buffer (b0)->l2.bd_index,
312 sw_if_index0, sclass0,
313 &outer_src, &outer_dst);
321 * this update could happen simultaneoulsy from multiple workers
322 * but that's ok we are not interested in being very accurate.
325 ge0->ge_last_time = time_now;
328 if (PREDICT_FALSE ((b0->flags & VLIB_BUFFER_IS_TRACED)))
330 gbp_learn_l2_trace_t *t =
331 vlib_add_trace (vm, node, b0, sizeof (*t));
332 clib_memcpy_fast (t->mac.bytes, eh0->src_address, 6);
333 t->new = (NULL == ge0);
335 t->sw_if_index = sw_if_index0;
337 t->gb_flags = gb0->gb_flags;
338 t->d_bit = ! !(vnet_buffer2 (b0)->gbp.flags &
339 VXLAN_GBP_GPFLAGS_D);
342 /* verify speculative enqueue, maybe switch current next frame */
343 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
344 to_next, n_left_to_next,
348 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
351 return frame->n_vectors;
354 /* packet trace format function */
356 format_gbp_learn_l2_trace (u8 * s, va_list * args)
358 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
359 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
360 gbp_learn_l2_trace_t *t = va_arg (*args, gbp_learn_l2_trace_t *);
362 s = format (s, "new:%d throttled:%d d-bit:%d mac:%U itf:%d sclass:%d"
364 t->new, t->throttled, t->d_bit,
365 format_mac_address_t, &t->mac, t->sw_if_index, t->sclass,
366 format_gbp_bridge_domain_flags, t->gb_flags);
372 VLIB_REGISTER_NODE (gbp_learn_l2_node) = {
373 .name = "gbp-learn-l2",
374 .vector_size = sizeof (u32),
375 .format_trace = format_gbp_learn_l2_trace,
376 .type = VLIB_NODE_TYPE_INTERNAL,
378 .n_errors = ARRAY_LEN(gbp_learn_error_strings),
379 .error_strings = gbp_learn_error_strings,
381 .n_next_nodes = GBP_LEARN_N_NEXT,
384 [GBP_LEARN_NEXT_DROP] = "error-drop",
389 typedef struct gbp_learn_l3_t_
395 ip46_address_t outer_src;
396 ip46_address_t outer_dst;
400 gbp_learn_l3_cp (const gbp_learn_l3_t * gl3)
402 ip46_address_t *ips = NULL;
404 GBP_LEARN_DBG ("L3 EP: %U, %d", format_ip46_address, &gl3->ip,
405 IP46_TYPE_ANY, gl3->sclass);
407 vec_add1 (ips, gl3->ip);
409 gbp_endpoint_update_and_lock (GBP_ENDPOINT_SRC_DP,
410 gl3->sw_if_index, ips, NULL,
411 INDEX_INVALID, INDEX_INVALID, gl3->sclass,
412 (GBP_ENDPOINT_FLAG_REMOTE |
413 GBP_ENDPOINT_FLAG_LEARNT),
414 &gl3->outer_dst, &gl3->outer_src, NULL);
419 gbp_learn_ip4_dp (const ip4_address_t * ip,
420 u32 fib_index, u32 sw_if_index, sclass_t sclass,
421 const ip4_address_t * outer_src,
422 const ip4_address_t * outer_dst)
425 gbp_learn_l3_t gl3 = {
429 .sw_if_index = sw_if_index,
430 .fib_index = fib_index,
432 .outer_src.ip4 = *outer_src,
433 .outer_dst.ip4 = *outer_dst,
437 vl_api_rpc_call_main_thread (gbp_learn_l3_cp, (u8 *) & gl3, sizeof (gl3));
441 gbp_learn_ip6_dp (const ip6_address_t * ip,
442 u32 fib_index, u32 sw_if_index, sclass_t sclass,
443 const ip4_address_t * outer_src,
444 const ip4_address_t * outer_dst)
447 gbp_learn_l3_t gl3 = {
451 .sw_if_index = sw_if_index,
452 .fib_index = fib_index,
454 .outer_src.ip4 = *outer_src,
455 .outer_dst.ip4 = *outer_dst,
459 vl_api_rpc_call_main_thread (gbp_learn_l3_cp, (u8 *) & gl3, sizeof (gl3));
463 * per-packet trace data
465 typedef struct gbp_learn_l3_trace_t_
467 /* per-pkt trace data */
473 } gbp_learn_l3_trace_t;
476 gbp_learn_l3 (vlib_main_t * vm,
477 vlib_node_runtime_t * node, vlib_frame_t * frame,
478 fib_protocol_t fproto)
480 u32 n_left_from, *from, *to_next, next_index, thread_index, seed;
481 gbp_learn_main_t *glm;
484 glm = &gbp_learn_main;
486 n_left_from = frame->n_vectors;
487 from = vlib_frame_vector_args (frame);
488 time_now = vlib_time_now (vm);
489 thread_index = vm->thread_index;
491 seed = throttle_seed (&glm->gl_l3_throttle, thread_index, time_now);
493 while (n_left_from > 0)
497 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
499 while (n_left_from > 0 && n_left_to_next > 0)
501 CLIB_UNUSED (const ip4_header_t *) ip4_0;
502 CLIB_UNUSED (const ip6_header_t *) ip6_0;
503 u32 bi0, sw_if_index0, t0, fib_index0;
504 ip4_address_t outer_src, outer_dst;
505 ethernet_header_t *eth0;
506 gbp_learn_next_t next0;
511 next0 = GBP_LEARN_NEXT_DROP;
519 b0 = vlib_get_buffer (vm, bi0);
520 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
521 sclass0 = vnet_buffer2 (b0)->gbp.sclass;
525 vnet_feature_next (&next0, b0);
527 if (vnet_buffer2 (b0)->gbp.flags & VXLAN_GBP_GPFLAGS_D)
534 fib_index0 = fib_table_get_index_for_sw_if_index (fproto,
537 if (FIB_PROTOCOL_IP6 == fproto)
539 ip6_0 = vlib_buffer_get_current (b0);
540 eth0 = (ethernet_header_t *) (((u8 *) ip6_0) - sizeof (*eth0));
542 gbp_learn_get_outer (eth0, &outer_src, &outer_dst);
544 ge0 = gbp_endpoint_find_ip6 (&ip6_0->src_address, fib_index0);
548 t0 = throttle_check (&glm->gl_l3_throttle,
550 ip6_address_hash_to_u32
551 (&ip6_0->src_address), seed);
555 gbp_learn_ip6_dp (&ip6_0->src_address,
556 fib_index0, sw_if_index0, sclass0,
557 &outer_src, &outer_dst);
563 * this update could happen simultaneoulsy from multiple
564 * workers but that's ok we are not interested in being
568 ge0->ge_last_time = time_now;
573 ip4_0 = vlib_buffer_get_current (b0);
574 eth0 = (ethernet_header_t *) (((u8 *) ip4_0) - sizeof (*eth0));
576 gbp_learn_get_outer (eth0, &outer_src, &outer_dst);
577 ge0 = gbp_endpoint_find_ip4 (&ip4_0->src_address, fib_index0);
581 t0 = throttle_check (&glm->gl_l3_throttle, thread_index,
582 ip4_0->src_address.as_u32, seed);
586 gbp_learn_ip4_dp (&ip4_0->src_address,
587 fib_index0, sw_if_index0, sclass0,
588 &outer_src, &outer_dst);
594 * this update could happen simultaneoulsy from multiple
595 * workers but that's ok we are not interested in being
599 ge0->ge_last_time = time_now;
603 if (PREDICT_FALSE ((b0->flags & VLIB_BUFFER_IS_TRACED)))
605 gbp_learn_l3_trace_t *t;
607 t = vlib_add_trace (vm, node, b0, sizeof (*t));
608 if (FIB_PROTOCOL_IP6 == fproto && ip6_0)
609 ip46_address_set_ip6 (&t->ip, &ip6_0->src_address);
610 if (FIB_PROTOCOL_IP4 == fproto && ip4_0)
611 ip46_address_set_ip4 (&t->ip, &ip4_0->src_address);
612 t->new = (NULL == ge0);
614 t->sw_if_index = sw_if_index0;
618 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
619 to_next, n_left_to_next,
623 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
626 return frame->n_vectors;
629 /* packet trace format function */
631 format_gbp_learn_l3_trace (u8 * s, va_list * args)
633 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
634 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
635 gbp_learn_l3_trace_t *t = va_arg (*args, gbp_learn_l3_trace_t *);
637 s = format (s, "new:%d throttled:%d ip:%U itf:%d sclass:%d",
638 t->new, t->throttled,
639 format_ip46_address, &t->ip, IP46_TYPE_ANY, t->sw_if_index,
645 VLIB_NODE_FN (gbp_learn_ip4_node) (vlib_main_t * vm,
646 vlib_node_runtime_t * node,
647 vlib_frame_t * frame)
649 return (gbp_learn_l3 (vm, node, frame, FIB_PROTOCOL_IP4));
652 VLIB_NODE_FN (gbp_learn_ip6_node) (vlib_main_t * vm,
653 vlib_node_runtime_t * node,
654 vlib_frame_t * frame)
656 return (gbp_learn_l3 (vm, node, frame, FIB_PROTOCOL_IP6));
660 VLIB_REGISTER_NODE (gbp_learn_ip4_node) = {
661 .name = "gbp-learn-ip4",
662 .vector_size = sizeof (u32),
663 .format_trace = format_gbp_learn_l3_trace,
664 .type = VLIB_NODE_TYPE_INTERNAL,
667 VNET_FEATURE_INIT (gbp_learn_ip4, static) =
669 .arc_name = "ip4-unicast",
670 .node_name = "gbp-learn-ip4",
673 VLIB_REGISTER_NODE (gbp_learn_ip6_node) = {
674 .name = "gbp-learn-ip6",
675 .vector_size = sizeof (u32),
676 .format_trace = format_gbp_learn_l3_trace,
677 .type = VLIB_NODE_TYPE_INTERNAL,
680 VNET_FEATURE_INIT (gbp_learn_ip6, static) =
682 .arc_name = "ip6-unicast",
683 .node_name = "gbp-learn-ip6",
689 * fd.io coding-style-patch-verification: ON
692 * eval: (c-set-style "gnu")