2 * gbp.h : Group Based Policy
4 * Copyright (c) 2018 Cisco and/or its affiliates.
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at:
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or 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.
18 #include <plugins/gbp/gbp.h>
19 #include <plugins/gbp/gbp_classify.h>
20 #include <plugins/gbp/gbp_policy_dpo.h>
21 #include <plugins/gbp/gbp_ext_itf.h>
22 #include <vnet/fib/ip4_fib.h>
23 #include <vnet/fib/ip6_fib.h>
24 #include <vnet/dpo/load_balance.h>
25 #include <vnet/l2/l2_input.h>
26 #include <vnet/l2/feat_bitmap.h>
27 #include <vnet/fib/fib_table.h>
28 #include <vnet/vxlan-gbp/vxlan_gbp_packet.h>
29 #include <vnet/ethernet/arp_packet.h>
32 * per-packet trace data
34 typedef struct gbp_classify_trace_t_
36 /* per-pkt trace data */
38 } gbp_classify_trace_t;
41 * determine the SRC EPG form the input port
44 gbp_classify_inline (vlib_main_t * vm,
45 vlib_node_runtime_t * node,
47 gbp_src_classify_type_t type, dpo_proto_t dproto)
49 gbp_src_classify_main_t *gscm = &gbp_src_classify_main;
50 u32 n_left_from, *from, *to_next;
54 n_left_from = frame->n_vectors;
55 from = vlib_frame_vector_args (frame);
57 while (n_left_from > 0)
61 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
63 while (n_left_from > 0 && n_left_to_next > 0)
65 u32 next0, bi0, sw_if_index0;
66 const gbp_endpoint_t *ge0;
77 b0 = vlib_get_buffer (vm, bi0);
79 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
80 vnet_buffer2 (b0)->gbp.flags = VXLAN_GBP_GPFLAGS_NONE;
82 if (GBP_SRC_CLASSIFY_NULL == type)
84 sclass0 = SCLASS_INVALID;
86 vnet_l2_feature_next (b0, gscm->l2_input_feat_next[type],
87 L2INPUT_FEAT_GBP_NULL_CLASSIFY);
91 if (DPO_PROTO_ETHERNET == dproto)
93 const ethernet_header_t *h0;
95 h0 = vlib_buffer_get_current (b0);
97 vnet_l2_feature_next (b0, gscm->l2_input_feat_next[type],
98 L2INPUT_FEAT_GBP_SRC_CLASSIFY);
99 ge0 = gbp_endpoint_find_mac (h0->src_address,
100 vnet_buffer (b0)->l2.bd_index);
102 else if (DPO_PROTO_IP4 == dproto)
104 const ip4_header_t *h0;
106 h0 = vlib_buffer_get_current (b0);
108 ge0 = gbp_endpoint_find_ip4
110 fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
115 * Go straight to looukp, do not pass go, do not collect $200
119 else if (DPO_PROTO_IP6 == dproto)
121 const ip6_header_t *h0;
123 h0 = vlib_buffer_get_current (b0);
125 ge0 = gbp_endpoint_find_ip6
127 fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP6,
132 * Go straight to lookup, do not pass go, do not collect $200
143 if (PREDICT_TRUE (NULL != ge0))
144 sclass0 = ge0->ge_fwd.gef_sclass;
146 sclass0 = SCLASS_INVALID;
149 vnet_buffer2 (b0)->gbp.sclass = sclass0;
151 if (PREDICT_FALSE ((b0->flags & VLIB_BUFFER_IS_TRACED)))
153 gbp_classify_trace_t *t =
154 vlib_add_trace (vm, node, b0, sizeof (*t));
158 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
159 to_next, n_left_to_next,
163 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
166 return frame->n_vectors;
169 VLIB_NODE_FN (gbp_src_classify_node) (vlib_main_t * vm,
170 vlib_node_runtime_t * node,
171 vlib_frame_t * frame)
173 return (gbp_classify_inline (vm, node, frame,
174 GBP_SRC_CLASSIFY_PORT, DPO_PROTO_ETHERNET));
177 VLIB_NODE_FN (gbp_null_classify_node) (vlib_main_t * vm,
178 vlib_node_runtime_t * node,
179 vlib_frame_t * frame)
181 return (gbp_classify_inline (vm, node, frame,
182 GBP_SRC_CLASSIFY_NULL, DPO_PROTO_ETHERNET));
185 VLIB_NODE_FN (gbp_ip4_src_classify_node) (vlib_main_t * vm,
186 vlib_node_runtime_t * node,
187 vlib_frame_t * frame)
189 return (gbp_classify_inline (vm, node, frame,
190 GBP_SRC_CLASSIFY_PORT, DPO_PROTO_IP4));
193 VLIB_NODE_FN (gbp_ip6_src_classify_node) (vlib_main_t * vm,
194 vlib_node_runtime_t * node,
195 vlib_frame_t * frame)
197 return (gbp_classify_inline (vm, node, frame,
198 GBP_SRC_CLASSIFY_PORT, DPO_PROTO_IP6));
202 /* packet trace format function */
204 format_gbp_classify_trace (u8 * s, va_list * args)
206 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
207 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
208 gbp_classify_trace_t *t = va_arg (*args, gbp_classify_trace_t *);
210 s = format (s, "sclass:%d", t->sclass);
216 VLIB_REGISTER_NODE (gbp_null_classify_node) = {
217 .name = "gbp-null-classify",
218 .vector_size = sizeof (u32),
219 .format_trace = format_gbp_classify_trace,
220 .type = VLIB_NODE_TYPE_INTERNAL,
226 VLIB_REGISTER_NODE (gbp_src_classify_node) = {
227 .name = "gbp-src-classify",
228 .vector_size = sizeof (u32),
229 .format_trace = format_gbp_classify_trace,
230 .type = VLIB_NODE_TYPE_INTERNAL,
236 VLIB_REGISTER_NODE (gbp_ip4_src_classify_node) = {
237 .name = "ip4-gbp-src-classify",
238 .vector_size = sizeof (u32),
239 .format_trace = format_gbp_classify_trace,
240 .type = VLIB_NODE_TYPE_INTERNAL,
249 VLIB_REGISTER_NODE (gbp_ip6_src_classify_node) = {
250 .name = "ip6-gbp-src-classify",
251 .vector_size = sizeof (u32),
252 .format_trace = format_gbp_classify_trace,
253 .type = VLIB_NODE_TYPE_INTERNAL,
262 VNET_FEATURE_INIT (gbp_ip4_src_classify_feat_node, static) =
264 .arc_name = "ip4-unicast",
265 .node_name = "ip4-gbp-src-classify",
266 .runs_before = VNET_FEATURES ("nat44-out2in"),
268 VNET_FEATURE_INIT (gbp_ip6_src_classify_feat_node, static) =
270 .arc_name = "ip6-unicast",
271 .node_name = "ip6-gbp-src-classify",
272 .runs_before = VNET_FEATURES ("nat66-out2in"),
277 typedef enum gbp_lpm_classify_next_t_
279 GPB_LPM_CLASSIFY_DROP,
280 } gbp_lpm_classify_next_t;
283 * per-packet trace data
285 typedef struct gbp_lpm_classify_trace_t_
290 } gbp_lpm_classify_trace_t;
292 /* packet trace format function */
294 format_gbp_lpm_classify_trace (u8 * s, va_list * args)
296 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
297 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
298 gbp_lpm_classify_trace_t *t = va_arg (*args, gbp_lpm_classify_trace_t *);
300 s = format (s, "sclass:%d lb:%d src:%U",
301 t->sclass, t->lbi, format_ip46_address, &t->src, IP46_TYPE_ANY);
314 * Determine the SRC EPG from a LPM
317 gbp_lpm_classify_inline (vlib_main_t * vm,
318 vlib_node_runtime_t * node,
319 vlib_frame_t * frame,
320 const dpo_proto_t dproto,
321 const enum gbp_lpm_type type)
323 gbp_src_classify_main_t *gscm = &gbp_src_classify_main;
324 u32 n_left_from, *from, *to_next;
328 n_left_from = frame->n_vectors;
329 from = vlib_frame_vector_args (frame);
331 while (n_left_from > 0)
335 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
337 while (n_left_from > 0 && n_left_to_next > 0)
339 u32 bi0, sw_if_index0, fib_index0, lbi0;
340 const gbp_endpoint_t *ge0, *ge_lpm0;
341 gbp_lpm_classify_next_t next0;
342 const ethernet_header_t *eh0;
343 const gbp_policy_dpo_t *gpd0;
344 const ip4_address_t *ip4_0;
345 const ip6_address_t *ip6_0;
346 const gbp_recirc_t *gr0;
358 next0 = GPB_LPM_CLASSIFY_DROP;
362 b0 = vlib_get_buffer (vm, bi0);
364 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
365 vnet_buffer2 (b0)->gbp.flags = VXLAN_GBP_GPFLAGS_NONE;
367 if (DPO_PROTO_IP4 == dproto)
369 &((ip4_header_t *) vlib_buffer_get_current (b0))->src_address;
370 else if (DPO_PROTO_IP6 == dproto)
372 &((ip6_header_t *) vlib_buffer_get_current (b0))->src_address;
373 else if (DPO_PROTO_ETHERNET == dproto)
375 eh0 = vlib_buffer_get_current (b0);
376 gbp_classify_get_ip_address (eh0, &ip4_0, &ip6_0,
377 GBP_CLASSIFY_GET_IP_SRC);
380 if (GBP_LPM_RECIRC == type)
382 gr0 = gbp_recirc_get (sw_if_index0);
383 fib_index0 = gr0->gr_fib_index[dproto];
386 vnet_feature_next (&next0, b0);
392 /* packet should be l2 */
393 sclass0 = SCLASS_INVALID;
397 if (GBP_LPM_ANON == type)
400 * anonymous LPM classification: only honour LPM as no EP
403 gbp_ext_itf_t *gei = gbp_ext_itf_get (sw_if_index0);
405 fib_index0 = gei->gx_fib_index[DPO_PROTO_IP4];
407 fib_index0 = gei->gx_fib_index[DPO_PROTO_IP6];
410 /* not IP so no LPM classify possible */
411 sclass0 = SCLASS_INVALID;
412 next0 = GPB_LPM_CLASSIFY_DROP;
415 next0 = vnet_l2_feature_next
416 (b0, gscm->l2_input_feat_next[GBP_SRC_CLASSIFY_LPM_ANON],
417 L2INPUT_FEAT_GBP_LPM_ANON_CLASSIFY);
422 * not an anonymous LPM classification: check it comes from
423 * an EP, and use EP RD info
425 ge0 = gbp_endpoint_find_mac (eh0->src_address,
426 vnet_buffer (b0)->l2.bd_index);
430 /* packet must have come from an EP's mac */
431 sclass0 = SCLASS_INVALID;
435 fib_index0 = ge0->ge_fwd.gef_fib_index;
437 if (~0 == fib_index0)
439 sclass0 = SCLASS_INVALID;
445 ge_lpm0 = gbp_endpoint_find_ip4 (ip4_0, fib_index0);
449 ge_lpm0 = gbp_endpoint_find_ip6 (ip6_0, fib_index0);
456 next0 = vnet_l2_feature_next
457 (b0, gscm->l2_input_feat_next[GBP_SRC_CLASSIFY_LPM],
458 L2INPUT_FEAT_GBP_LPM_CLASSIFY);
461 * if we found the EP by IP lookup, it must be from the EP
462 * not a network behind it
466 if (PREDICT_FALSE (ge0 != ge_lpm0))
468 /* an EP spoofing another EP */
469 sclass0 = SCLASS_INVALID;
470 next0 = GPB_LPM_CLASSIFY_DROP;
474 sclass0 = ge0->ge_fwd.gef_sclass;
481 gpd0 = gbp_classify_get_gpd (ip4_0, ip6_0, fib_index0);
484 /* could not classify => drop */
485 sclass0 = SCLASS_INVALID;
486 next0 = GPB_LPM_CLASSIFY_DROP;
490 sclass0 = gpd0->gpd_sclass;
492 /* all packets from an external network should not be learned by the
493 * reciever. so set the Do-not-learn bit here */
494 vnet_buffer2 (b0)->gbp.flags = VXLAN_GBP_GPFLAGS_D;
497 vnet_buffer2 (b0)->gbp.sclass = sclass0;
499 if (PREDICT_FALSE ((b0->flags & VLIB_BUFFER_IS_TRACED)))
501 gbp_lpm_classify_trace_t *t =
502 vlib_add_trace (vm, node, b0, sizeof (*t));
511 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
512 to_next, n_left_to_next,
516 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
519 return frame->n_vectors;
522 VLIB_NODE_FN (gbp_ip4_lpm_classify_node) (vlib_main_t * vm,
523 vlib_node_runtime_t * node,
524 vlib_frame_t * frame)
526 return (gbp_lpm_classify_inline
527 (vm, node, frame, DPO_PROTO_IP4, GBP_LPM_RECIRC));
530 VLIB_NODE_FN (gbp_ip6_lpm_classify_node) (vlib_main_t * vm,
531 vlib_node_runtime_t * node,
532 vlib_frame_t * frame)
534 return (gbp_lpm_classify_inline
535 (vm, node, frame, DPO_PROTO_IP6, GBP_LPM_RECIRC));
538 VLIB_NODE_FN (gbp_l2_lpm_classify_node) (vlib_main_t * vm,
539 vlib_node_runtime_t * node,
540 vlib_frame_t * frame)
542 return (gbp_lpm_classify_inline
543 (vm, node, frame, DPO_PROTO_ETHERNET, GBP_LPM_EPG));
546 VLIB_NODE_FN (gbp_l2_lpm_anon_classify_node) (vlib_main_t * vm,
547 vlib_node_runtime_t * node,
548 vlib_frame_t * frame)
550 return (gbp_lpm_classify_inline
551 (vm, node, frame, DPO_PROTO_ETHERNET, GBP_LPM_ANON));
555 VLIB_REGISTER_NODE (gbp_ip4_lpm_classify_node) = {
556 .name = "ip4-gbp-lpm-classify",
557 .vector_size = sizeof (u32),
558 .format_trace = format_gbp_lpm_classify_trace,
559 .type = VLIB_NODE_TYPE_INTERNAL,
564 [GPB_LPM_CLASSIFY_DROP] = "ip4-drop"
568 VLIB_REGISTER_NODE (gbp_ip6_lpm_classify_node) = {
569 .name = "ip6-gbp-lpm-classify",
570 .vector_size = sizeof (u32),
571 .format_trace = format_gbp_lpm_classify_trace,
572 .type = VLIB_NODE_TYPE_INTERNAL,
577 [GPB_LPM_CLASSIFY_DROP] = "ip6-drop"
581 VLIB_REGISTER_NODE (gbp_l2_lpm_classify_node) = {
582 .name = "l2-gbp-lpm-classify",
583 .vector_size = sizeof (u32),
584 .format_trace = format_gbp_lpm_classify_trace,
585 .type = VLIB_NODE_TYPE_INTERNAL,
590 [GPB_LPM_CLASSIFY_DROP] = "error-drop"
594 VLIB_REGISTER_NODE (gbp_l2_lpm_anon_classify_node) = {
595 .name = "l2-gbp-lpm-anon-classify",
596 .vector_size = sizeof (u32),
597 .format_trace = format_gbp_lpm_classify_trace,
598 .type = VLIB_NODE_TYPE_INTERNAL,
603 [GPB_LPM_CLASSIFY_DROP] = "error-drop"
607 VNET_FEATURE_INIT (gbp_ip4_lpm_classify_feat_node, static) =
609 .arc_name = "ip4-unicast",
610 .node_name = "ip4-gbp-lpm-classify",
611 .runs_before = VNET_FEATURES ("nat44-out2in"),
613 VNET_FEATURE_INIT (gbp_ip6_lpm_classify_feat_node, static) =
615 .arc_name = "ip6-unicast",
616 .node_name = "ip6-gbp-lpm-classify",
617 .runs_before = VNET_FEATURES ("nat66-out2in"),
623 * fd.io coding-style-patch-verification: ON
626 * eval: (c-set-style "gnu")