2 * lcp_enthernet_node.c : linux control plane ethernet node
4 * Copyright (c) 2021 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 <sys/socket.h>
21 #include <plugins/linux-cp/lcp_interface.h>
22 #include <plugins/linux-cp/lcp_adj.h>
23 #include <linux-cp/lcp.api_enum.h>
25 #include <vnet/feature/feature.h>
26 #include <vnet/ip/ip4_packet.h>
27 #include <vnet/ethernet/arp_packet.h>
28 #include <vnet/ethernet/ethernet.h>
29 #include <vnet/ip/ip_types.h>
30 #include <vnet/ip/lookup.h>
31 #include <vnet/ip/ip4.h>
32 #include <vnet/ip/ip6.h>
33 #include <vnet/l2/l2_input.h>
35 #define foreach_lip_punt \
36 _ (IO, "punt to host") \
37 _ (DROP, "unknown input interface")
41 #define _(sym, str) LIP_PUNT_NEXT_##sym,
47 typedef struct lip_punt_trace_t_
53 /* packet trace format function */
55 format_lip_punt_trace (u8 *s, va_list *args)
57 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
58 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
59 lip_punt_trace_t *t = va_arg (*args, lip_punt_trace_t *);
62 format (s, "lip-punt: %u -> %u", t->phy_sw_if_index, t->host_sw_if_index);
68 * Pass punted packets from the PHY to the HOST.
70 VLIB_NODE_FN (lip_punt_node)
71 (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
73 u32 n_left_from, *from, *to_next, n_left_to_next;
74 lip_punt_next_t next_index;
76 next_index = node->cached_next_index;
77 n_left_from = frame->n_vectors;
78 from = vlib_frame_vector_args (frame);
80 while (n_left_from > 0)
82 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
84 while (n_left_from > 0 && n_left_to_next > 0)
87 const lcp_itf_pair_t *lip0 = NULL;
93 bi0 = to_next[0] = from[0];
99 next0 = LIP_PUNT_NEXT_DROP;
101 b0 = vlib_get_buffer (vm, bi0);
103 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
104 lipi0 = lcp_itf_pair_find_by_phy (sw_if_index0);
105 if (PREDICT_FALSE (lipi0 == INDEX_INVALID))
108 lip0 = lcp_itf_pair_get (lipi0);
109 next0 = LIP_PUNT_NEXT_IO;
110 vnet_buffer (b0)->sw_if_index[VLIB_TX] = lip0->lip_host_sw_if_index;
112 if (PREDICT_TRUE (lip0->lip_host_type == LCP_ITF_HOST_TAP))
115 * rewind to ethernet header
117 len0 = ((u8 *) vlib_buffer_get_current (b0) -
118 (u8 *) ethernet_buffer_get_header (b0));
119 vlib_buffer_advance (b0, -len0);
121 /* Tun packets don't need any special treatment, just need to
122 * be escorted past the TTL decrement. If we still want to use
123 * ip[46]-punt-redirect with these, we could just set the
124 * VNET_BUFFER_F_LOCALLY_ORIGINATED in an 'else {}' here and
125 * then pass to the next node on the ip[46]-punt feature arc
129 if (PREDICT_FALSE ((b0->flags & VLIB_BUFFER_IS_TRACED)))
131 lip_punt_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
132 t->phy_sw_if_index = sw_if_index0;
133 t->host_sw_if_index =
134 (lipi0 == INDEX_INVALID) ? ~0 : lip0->lip_host_sw_if_index;
137 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
138 n_left_to_next, bi0, next0);
141 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
144 return frame->n_vectors;
147 VLIB_REGISTER_NODE (lip_punt_node) = {
148 .name = "linux-cp-punt",
149 .vector_size = sizeof (u32),
150 .format_trace = format_lip_punt_trace,
151 .type = VLIB_NODE_TYPE_INTERNAL,
153 .n_next_nodes = LIP_PUNT_N_NEXT,
155 [LIP_PUNT_NEXT_DROP] = "error-drop",
156 [LIP_PUNT_NEXT_IO] = "interface-output",
160 #define foreach_lcp_punt_l3 _ (DROP, "unknown error")
164 #define _(sym, str) LCP_LOCAL_NEXT_##sym,
168 } lcp_punt_l3_next_t;
170 typedef struct lcp_punt_l3_trace_t_
173 } lcp_punt_l3_trace_t;
175 /* packet trace format function */
177 format_lcp_punt_l3_trace (u8 *s, va_list *args)
179 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
180 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
181 lcp_punt_l3_trace_t *t = va_arg (*args, lcp_punt_l3_trace_t *);
183 s = format (s, "linux-cp-punt-l3: %u", t->phy_sw_if_index);
188 VLIB_NODE_FN (lcp_punt_l3_node)
189 (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
191 u32 n_left_from, *from, *to_next, n_left_to_next;
192 lip_punt_next_t next_index;
194 next_index = node->cached_next_index;
195 n_left_from = frame->n_vectors;
196 from = vlib_frame_vector_args (frame);
198 while (n_left_from > 0)
200 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
202 while (n_left_from > 0 && n_left_to_next > 0)
205 u32 next0 = LCP_LOCAL_NEXT_DROP;
208 lcp_itf_pair_t *lip0;
210 bi0 = to_next[0] = from[0];
217 b0 = vlib_get_buffer (vm, bi0);
218 vnet_feature_next (&next0, b0);
221 lcp_itf_pair_find_by_phy (vnet_buffer (b0)->sw_if_index[VLIB_RX]);
222 if (lipi0 != INDEX_INVALID)
225 * Avoid TTL check for packets which arrived on a tunnel and
226 * are being punted to the local host.
228 lip0 = lcp_itf_pair_get (lipi0);
229 if (lip0->lip_host_type == LCP_ITF_HOST_TUN)
230 b0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
233 if (PREDICT_FALSE ((b0->flags & VLIB_BUFFER_IS_TRACED)))
235 lcp_punt_l3_trace_t *t =
236 vlib_add_trace (vm, node, b0, sizeof (*t));
237 t->phy_sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
240 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
241 n_left_to_next, bi0, next0);
244 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
247 return frame->n_vectors;
250 VLIB_REGISTER_NODE (lcp_punt_l3_node) = {
251 .name = "linux-cp-punt-l3",
252 .vector_size = sizeof (u32),
253 .format_trace = format_lcp_punt_l3_trace,
254 .type = VLIB_NODE_TYPE_INTERNAL,
258 [LCP_LOCAL_NEXT_DROP] = "error-drop",
262 VNET_FEATURE_INIT (lcp_punt_l3_ip4, static) = {
263 .arc_name = "ip4-punt",
264 .node_name = "linux-cp-punt-l3",
265 .runs_before = VNET_FEATURES ("ip4-punt-redirect"),
268 VNET_FEATURE_INIT (lip_punt_l3_ip6, static) = {
269 .arc_name = "ip6-punt",
270 .node_name = "linux-cp-punt-l3",
271 .runs_before = VNET_FEATURES ("ip6-punt-redirect"),
274 #define foreach_lcp_xc \
276 _ (XC_IP4, "x-connnect-ip4") \
277 _ (XC_IP6, "x-connnect-ip6")
281 #define _(sym, str) LCP_XC_NEXT_##sym,
287 typedef struct lcp_xc_trace_t_
290 adj_index_t adj_index;
293 /* packet trace format function */
295 format_lcp_xc_trace (u8 *s, va_list *args)
297 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
298 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
299 lcp_xc_trace_t *t = va_arg (*args, lcp_xc_trace_t *);
301 s = format (s, "lcp-xc: itf:%d adj:%d", t->phy_sw_if_index, t->adj_index);
307 * X-connect all packets from the HOST to the PHY.
309 * This runs in either the IP4 or IP6 path. The MAC rewrite on the received
310 * packet from the host is used as a key to find the adjacency used on the phy.
311 * This allows this code to start the feature arc on that adjacency.
312 * Consequently, all packet sent from the host are also subject to output
313 * features, which is symmetric w.r.t. to input features.
315 static_always_inline u32
316 lcp_xc_inline (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame,
317 ip_address_family_t af)
319 u32 n_left_from, *from, *to_next, n_left_to_next;
320 lcp_xc_next_t next_index;
321 ip_lookup_main_t *lm;
324 n_left_from = frame->n_vectors;
325 from = vlib_frame_vector_args (frame);
328 lm = &ip4_main.lookup_main;
330 lm = &ip6_main.lookup_main;
332 while (n_left_from > 0)
334 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
336 while (n_left_from > 0 && n_left_to_next > 0)
338 const ethernet_header_t *eth;
339 const lcp_itf_pair_t *lip;
340 u32 next0, bi0, lipi, ai;
342 const ip_adjacency_t *adj;
344 bi0 = to_next[0] = from[0];
351 b0 = vlib_get_buffer (vm, bi0);
354 lcp_itf_pair_find_by_host (vnet_buffer (b0)->sw_if_index[VLIB_RX]);
355 lip = lcp_itf_pair_get (lipi);
357 vnet_buffer (b0)->sw_if_index[VLIB_TX] = lip->lip_phy_sw_if_index;
358 vlib_buffer_advance (b0, -lip->lip_rewrite_len);
359 eth = vlib_buffer_get_current (b0);
361 ai = ADJ_INDEX_INVALID;
362 if (!ethernet_address_cast (eth->dst_address))
363 ai = lcp_adj_lkup ((u8 *) eth, lip->lip_rewrite_len,
364 vnet_buffer (b0)->sw_if_index[VLIB_TX]);
365 if (ai == ADJ_INDEX_INVALID)
366 ai = lip->lip_phy_adjs.adj_index[af];
369 vnet_buffer (b0)->ip.adj_index[VLIB_TX] = ai;
370 next0 = adj->rewrite_header.next_index;
371 vnet_buffer (b0)->ip.save_rewrite_length = lip->lip_rewrite_len;
373 if (PREDICT_FALSE (adj->rewrite_header.flags &
374 VNET_REWRITE_HAS_FEATURES))
375 vnet_feature_arc_start_w_cfg_index (
376 lm->output_feature_arc_index,
377 vnet_buffer (b0)->sw_if_index[VLIB_TX], &next0, b0,
380 if (PREDICT_FALSE ((b0->flags & VLIB_BUFFER_IS_TRACED)))
382 lcp_xc_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
383 t->phy_sw_if_index = lip->lip_phy_sw_if_index;
384 t->adj_index = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
387 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
388 n_left_to_next, bi0, next0);
391 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
394 return frame->n_vectors;
397 VLIB_NODE_FN (lcp_xc_ip4)
398 (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
400 return (lcp_xc_inline (vm, node, frame, AF_IP4));
403 VLIB_NODE_FN (lcp_xc_ip6)
404 (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
406 return (lcp_xc_inline (vm, node, frame, AF_IP6));
409 VLIB_REGISTER_NODE (lcp_xc_ip4) = { .name = "linux-cp-xc-ip4",
410 .vector_size = sizeof (u32),
411 .format_trace = format_lcp_xc_trace,
412 .type = VLIB_NODE_TYPE_INTERNAL,
413 .sibling_of = "ip4-rewrite" };
415 VNET_FEATURE_INIT (lcp_xc_ip4_ucast_node, static) = {
416 .arc_name = "ip4-unicast",
417 .node_name = "linux-cp-xc-ip4",
419 VNET_FEATURE_INIT (lcp_xc_ip4_mcast_node, static) = {
420 .arc_name = "ip4-multicast",
421 .node_name = "linux-cp-xc-ip4",
424 VLIB_REGISTER_NODE (lcp_xc_ip6) = { .name = "linux-cp-xc-ip6",
425 .vector_size = sizeof (u32),
426 .format_trace = format_lcp_xc_trace,
427 .type = VLIB_NODE_TYPE_INTERNAL,
428 .sibling_of = "ip6-rewrite" };
430 VNET_FEATURE_INIT (lcp_xc_ip6_ucast_node, static) = {
431 .arc_name = "ip6-unicast",
432 .node_name = "linux-cp-xc-ip6",
434 VNET_FEATURE_INIT (lcp_xc_ip6_mcast_node, static) = {
435 .arc_name = "ip6-multicast",
436 .node_name = "linux-cp-xc-ip6",
446 * X-connect all packets from the HOST to the PHY on L3 interfaces
448 * There's only one adjacency that can be used on thises links.
450 static_always_inline u32
451 lcp_xc_l3_inline (vlib_main_t *vm, vlib_node_runtime_t *node,
452 vlib_frame_t *frame, ip_address_family_t af)
454 u32 n_left_from, *from, *to_next, n_left_to_next;
455 lcp_xc_next_t next_index;
458 n_left_from = frame->n_vectors;
459 from = vlib_frame_vector_args (frame);
461 while (n_left_from > 0)
463 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
465 while (n_left_from > 0 && n_left_to_next > 0)
468 const lcp_itf_pair_t *lip;
472 bi0 = to_next[0] = from[0];
479 b0 = vlib_get_buffer (vm, bi0);
481 /* Flag buffers as locally originated. Otherwise their TTL will
482 * be checked & decremented. That would break services like BGP
483 * which set a TTL of 1 by default.
485 b0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
488 lcp_itf_pair_find_by_host (vnet_buffer (b0)->sw_if_index[VLIB_RX]);
489 lip = lcp_itf_pair_get (lipi);
491 vnet_buffer (b0)->sw_if_index[VLIB_TX] = lip->lip_phy_sw_if_index;
492 next0 = LCP_XC_L3_NEXT_XC;
493 vnet_buffer (b0)->ip.adj_index[VLIB_TX] =
494 lip->lip_phy_adjs.adj_index[af];
496 if (PREDICT_FALSE ((b0->flags & VLIB_BUFFER_IS_TRACED)))
498 lcp_xc_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
499 t->phy_sw_if_index = lip->lip_phy_sw_if_index;
500 t->adj_index = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
503 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
504 n_left_to_next, bi0, next0);
507 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
510 return frame->n_vectors;
514 * X-connect all packets from the HOST to the PHY.
516 VLIB_NODE_FN (lcp_xc_l3_ip4_node)
517 (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
519 return (lcp_xc_l3_inline (vm, node, frame, AF_IP4));
522 VLIB_NODE_FN (lcp_xc_l3_ip6_node)
523 (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
525 return (lcp_xc_l3_inline (vm, node, frame, AF_IP6));
528 VLIB_REGISTER_NODE (lcp_xc_l3_ip4_node) = {
529 .name = "linux-cp-xc-l3-ip4",
530 .vector_size = sizeof (u32),
531 .format_trace = format_lcp_xc_trace,
532 .type = VLIB_NODE_TYPE_INTERNAL,
534 .n_next_nodes = LCP_XC_L3_N_NEXT,
536 [LCP_XC_L3_NEXT_XC] = "ip4-midchain",
540 VNET_FEATURE_INIT (lcp_xc_node_l3_ip4_unicast, static) = {
541 .arc_name = "ip4-unicast",
542 .node_name = "linux-cp-xc-l3-ip4",
545 VNET_FEATURE_INIT (lcp_xc_node_l3_ip4_multicaast, static) = {
546 .arc_name = "ip4-multicast",
547 .node_name = "linux-cp-xc-l3-ip4",
550 VLIB_REGISTER_NODE (lcp_xc_l3_ip6_node) = {
551 .name = "linux-cp-xc-l3-ip6",
552 .vector_size = sizeof (u32),
553 .format_trace = format_lcp_xc_trace,
554 .type = VLIB_NODE_TYPE_INTERNAL,
556 .n_next_nodes = LCP_XC_L3_N_NEXT,
558 [LCP_XC_L3_NEXT_XC] = "ip6-midchain",
562 VNET_FEATURE_INIT (lcp_xc_node_l3_ip6_unicast, static) = {
563 .arc_name = "ip6-unicast",
564 .node_name = "linux-cp-xc-l3-ip6",
567 VNET_FEATURE_INIT (lcp_xc_node_l3_ip6_multicast, static) = {
568 .arc_name = "ip6-multicast",
569 .node_name = "linux-cp-xc-l3-ip6",
572 #define foreach_lcp_arp \
573 _ (DROP, "error-drop") \
574 _ (IO, "interface-output")
578 #define _(sym, str) LCP_ARP_NEXT_##sym,
584 typedef struct lcp_arp_trace_t_
590 /* packet trace format function */
592 format_lcp_arp_trace (u8 *s, va_list *args)
594 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
595 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
596 lcp_arp_trace_t *t = va_arg (*args, lcp_arp_trace_t *);
598 s = format (s, "rx-sw-if-index: %u opcode: %u", t->rx_sw_if_index,
605 * punt ARP replies to the host
607 VLIB_NODE_FN (lcp_arp_phy_node)
608 (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
610 u32 n_left_from, *from, *to_next, n_left_to_next;
611 lcp_arp_next_t next_index;
612 u32 reply_copies[VLIB_FRAME_SIZE];
615 next_index = node->cached_next_index;
616 n_left_from = frame->n_vectors;
617 from = vlib_frame_vector_args (frame);
619 while (n_left_from > 0)
621 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
623 while (n_left_from >= 2 && n_left_to_next >= 2)
625 u32 next0, next1, bi0, bi1;
626 vlib_buffer_t *b0, *b1;
627 ethernet_arp_header_t *arp0, *arp1;
629 bi0 = to_next[0] = from[0];
630 bi1 = to_next[1] = from[1];
637 next0 = next1 = LCP_ARP_NEXT_DROP;
639 b0 = vlib_get_buffer (vm, bi0);
640 b1 = vlib_get_buffer (vm, bi1);
642 arp0 = vlib_buffer_get_current (b0);
643 arp1 = vlib_buffer_get_current (b1);
645 vnet_feature_next (&next0, b0);
646 vnet_feature_next (&next1, b1);
649 * Replies might need to be received by the host, so we
650 * make a copy of them.
652 if (arp0->opcode == clib_host_to_net_u16 (ETHERNET_ARP_OPCODE_reply))
654 lcp_itf_pair_t *lip0 = 0;
659 lipi0 = lcp_itf_pair_find_by_phy (
660 vnet_buffer (b0)->sw_if_index[VLIB_RX]);
661 lip0 = lcp_itf_pair_get (lipi0);
666 * rewind to eth header, copy, advance back to current
668 len0 = ((u8 *) vlib_buffer_get_current (b0) -
669 (u8 *) ethernet_buffer_get_header (b0));
670 vlib_buffer_advance (b0, -len0);
671 c0 = vlib_buffer_copy (vm, b0);
672 vlib_buffer_advance (b0, len0);
674 /* Send to the host */
675 vnet_buffer (c0)->sw_if_index[VLIB_TX] =
676 lip0->lip_host_sw_if_index;
677 reply_copies[n_copies++] = vlib_get_buffer_index (vm, c0);
680 if (arp1->opcode == clib_host_to_net_u16 (ETHERNET_ARP_OPCODE_reply))
682 lcp_itf_pair_t *lip1 = 0;
687 lipi1 = lcp_itf_pair_find_by_phy (
688 vnet_buffer (b1)->sw_if_index[VLIB_RX]);
689 lip1 = lcp_itf_pair_get (lipi1);
694 * rewind to reveal the ethernet header
696 len1 = ((u8 *) vlib_buffer_get_current (b1) -
697 (u8 *) ethernet_buffer_get_header (b1));
698 vlib_buffer_advance (b1, -len1);
699 c1 = vlib_buffer_copy (vm, b1);
700 vlib_buffer_advance (b1, len1);
702 /* Send to the host */
703 vnet_buffer (c1)->sw_if_index[VLIB_TX] =
704 lip1->lip_host_sw_if_index;
705 reply_copies[n_copies++] = vlib_get_buffer_index (vm, c1);
709 if (PREDICT_FALSE ((b0->flags & VLIB_BUFFER_IS_TRACED)))
711 lcp_arp_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
712 t->rx_sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
714 if (PREDICT_FALSE ((b1->flags & VLIB_BUFFER_IS_TRACED)))
716 lcp_arp_trace_t *t = vlib_add_trace (vm, node, b1, sizeof (*t));
717 t->rx_sw_if_index = vnet_buffer (b1)->sw_if_index[VLIB_RX];
720 vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
721 n_left_to_next, bi0, bi1, next0,
725 while (n_left_from > 0 && n_left_to_next > 0)
729 ethernet_arp_header_t *arp0;
732 bi0 = to_next[0] = from[0];
738 next0 = LCP_ARP_NEXT_DROP;
740 b0 = vlib_get_buffer (vm, bi0);
741 arp0 = vlib_buffer_get_current (b0);
743 vnet_feature_next (&next0, b0);
746 * Replies might need to be received by the host, so we
747 * make a copy of them.
749 arp_opcode = clib_host_to_net_u16 (arp0->opcode);
751 if (arp_opcode == ETHERNET_ARP_OPCODE_reply)
753 lcp_itf_pair_t *lip0 = 0;
758 lipi0 = lcp_itf_pair_find_by_phy (
759 vnet_buffer (b0)->sw_if_index[VLIB_RX]);
760 lip0 = lcp_itf_pair_get (lipi0);
766 * rewind to reveal the ethernet header
768 len0 = ((u8 *) vlib_buffer_get_current (b0) -
769 (u8 *) ethernet_buffer_get_header (b0));
770 vlib_buffer_advance (b0, -len0);
771 c0 = vlib_buffer_copy (vm, b0);
772 vlib_buffer_advance (b0, len0);
774 /* Send to the host */
775 vnet_buffer (c0)->sw_if_index[VLIB_TX] =
776 lip0->lip_host_sw_if_index;
777 reply_copies[n_copies++] = vlib_get_buffer_index (vm, c0);
781 if (PREDICT_FALSE ((b0->flags & VLIB_BUFFER_IS_TRACED)))
783 lcp_arp_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
784 t->rx_sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
785 t->arp_opcode = arp_opcode;
788 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
789 n_left_to_next, bi0, next0);
792 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
796 vlib_buffer_enqueue_to_single_next (vm, node, reply_copies,
797 LCP_ARP_NEXT_IO, n_copies);
799 return frame->n_vectors;
802 VLIB_REGISTER_NODE (lcp_arp_phy_node) = {
803 .name = "linux-cp-arp-phy",
804 .vector_size = sizeof (u32),
805 .format_trace = format_lcp_arp_trace,
806 .type = VLIB_NODE_TYPE_INTERNAL,
808 .n_errors = LINUXCP_N_ERROR,
809 .error_counters = linuxcp_error_counters,
811 .n_next_nodes = LCP_ARP_N_NEXT,
813 [LCP_ARP_NEXT_DROP] = "error-drop",
814 [LCP_ARP_NEXT_IO] = "interface-output",
818 VNET_FEATURE_INIT (lcp_arp_phy_arp_feat, static) = {
820 .node_name = "linux-cp-arp-phy",
821 .runs_before = VNET_FEATURES ("arp-reply"),
825 * x-connect ARP packets from the host to the phy
827 VLIB_NODE_FN (lcp_arp_host_node)
828 (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
830 u32 n_left_from, *from, *to_next, n_left_to_next;
831 lcp_arp_next_t next_index;
833 next_index = node->cached_next_index;
834 n_left_from = frame->n_vectors;
835 from = vlib_frame_vector_args (frame);
837 while (n_left_from > 0)
839 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
841 while (n_left_from > 0 && n_left_to_next > 0)
843 const lcp_itf_pair_t *lip0;
844 lcp_arp_next_t next0;
849 bi0 = to_next[0] = from[0];
855 next0 = LCP_ARP_NEXT_IO;
857 b0 = vlib_get_buffer (vm, bi0);
860 lcp_itf_pair_find_by_host (vnet_buffer (b0)->sw_if_index[VLIB_RX]);
861 lip0 = lcp_itf_pair_get (lipi0);
863 /* Send to the phy */
864 vnet_buffer (b0)->sw_if_index[VLIB_TX] = lip0->lip_phy_sw_if_index;
866 len0 = ((u8 *) vlib_buffer_get_current (b0) -
867 (u8 *) ethernet_buffer_get_header (b0));
868 vlib_buffer_advance (b0, -len0);
870 if (PREDICT_FALSE ((b0->flags & VLIB_BUFFER_IS_TRACED)))
872 lcp_arp_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
873 t->rx_sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
876 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
877 n_left_to_next, bi0, next0);
880 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
883 return frame->n_vectors;
886 VLIB_REGISTER_NODE (lcp_arp_host_node) = {
887 .name = "linux-cp-arp-host",
888 .vector_size = sizeof (u32),
889 .format_trace = format_lcp_arp_trace,
890 .type = VLIB_NODE_TYPE_INTERNAL,
892 .n_errors = LINUXCP_N_ERROR,
893 .error_counters = linuxcp_error_counters,
895 .n_next_nodes = LCP_ARP_N_NEXT,
897 [LCP_ARP_NEXT_DROP] = "error-drop",
898 [LCP_ARP_NEXT_IO] = "interface-output",
902 VNET_FEATURE_INIT (lcp_arp_host_arp_feat, static) = {
904 .node_name = "linux-cp-arp-host",
905 .runs_before = VNET_FEATURES ("arp-reply"),
909 * fd.io coding-style-patch-verification: ON
912 * eval: (c-set-style "gnu")