2 * Copyright (c) 2015 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 * ethernet_node.c: ethernet packet processing
18 * Copyright (c) 2008 Eliot Dresselhaus
20 * Permission is hereby granted, free of charge, to any person obtaining
21 * a copy of this software and associated documentation files (the
22 * "Software"), to deal in the Software without restriction, including
23 * without limitation the rights to use, copy, modify, merge, publish,
24 * distribute, sublicense, and/or sell copies of the Software, and to
25 * permit persons to whom the Software is furnished to do so, subject to
26 * the following conditions:
28 * The above copyright notice and this permission notice shall be
29 * included in all copies or substantial portions of the Software.
31 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
32 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
33 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
34 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
35 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
36 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
37 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
40 #include <vlib/vlib.h>
41 #include <vnet/pg/pg.h>
42 #include <vnet/ethernet/ethernet.h>
43 #include <vppinfra/sparse_vec.h>
44 #include <vnet/l2/l2_bvi.h>
47 #define foreach_ethernet_input_next \
48 _ (PUNT, "error-punt") \
49 _ (DROP, "error-drop") \
53 #define _(s,n) ETHERNET_INPUT_NEXT_##s,
54 foreach_ethernet_input_next
56 ETHERNET_INPUT_N_NEXT,
57 } ethernet_input_next_t;
61 } ethernet_input_trace_t;
63 static u8 * format_ethernet_input_trace (u8 * s, va_list * va)
65 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *);
66 CLIB_UNUSED (vlib_node_t * node) = va_arg (*va, vlib_node_t *);
67 ethernet_input_trace_t * t = va_arg (*va, ethernet_input_trace_t *);
69 s = format (s, "%U", format_ethernet_header, t->packet_data);
74 vlib_node_registration_t ethernet_input_node;
77 ETHERNET_INPUT_VARIANT_ETHERNET,
78 ETHERNET_INPUT_VARIANT_ETHERNET_TYPE,
79 ETHERNET_INPUT_VARIANT_VLAN,
80 ETHERNET_INPUT_VARIANT_NOT_L2,
81 } ethernet_input_variant_t;
84 // Compare two ethernet macs. Return 1 if they are the same, 0 if different
85 static_always_inline u32
86 eth_mac_equal (u8 * mac1, u8 * mac2) {
87 return (*((u32 *)(mac1+0)) == *((u32 *)(mac2+0)) &&
88 *((u32 *)(mac1+2)) == *((u32 *)(mac2+2)));
92 // Parse the ethernet header to extract vlan tags and innermost ethertype
93 static_always_inline void
94 parse_header (ethernet_input_variant_t variant,
102 if (variant == ETHERNET_INPUT_VARIANT_ETHERNET
103 || variant == ETHERNET_INPUT_VARIANT_NOT_L2) {
104 ethernet_header_t * e0;
106 e0 = (void *) (b0->data + b0->current_data);
108 vnet_buffer (b0)->ethernet.start_of_ethernet_header = b0->current_data;
110 vlib_buffer_advance (b0, sizeof (e0[0]));
112 *type = clib_net_to_host_u16(e0->type);
113 } else if (variant == ETHERNET_INPUT_VARIANT_ETHERNET_TYPE) {
114 // here when prior node was LLC/SNAP processing
117 e0 = (void *) (b0->data + b0->current_data);
119 vlib_buffer_advance (b0, sizeof (e0[0]));
121 *type = clib_net_to_host_u16(e0[0]);
124 // save for distinguishing between dot1q and dot1ad later
127 // default the tags to 0 (used if there is no corresponding tag)
131 *match_flags = SUBINT_CONFIG_VALID | SUBINT_CONFIG_MATCH_0_TAG;
133 // check for vlan encaps
134 if ((*type == ETHERNET_TYPE_VLAN) ||
135 (*type == ETHERNET_TYPE_DOT1AD) ||
136 (*type == ETHERNET_TYPE_VLAN_9100) ||
137 (*type == ETHERNET_TYPE_VLAN_9200))
139 ethernet_vlan_header_t * h0;
142 *match_flags = SUBINT_CONFIG_VALID | SUBINT_CONFIG_MATCH_1_TAG;
144 h0 = (void *) (b0->data + b0->current_data);
146 tag = clib_net_to_host_u16 (h0->priority_cfi_and_id);
148 *outer_id = tag & 0xfff;
150 *type = clib_net_to_host_u16(h0->type);
152 vlib_buffer_advance (b0, sizeof (h0[0]));
154 if (*type == ETHERNET_TYPE_VLAN) {
155 // Double tagged packet
156 *match_flags = SUBINT_CONFIG_VALID | SUBINT_CONFIG_MATCH_2_TAG;
158 h0 = (void *) (b0->data + b0->current_data);
160 tag = clib_net_to_host_u16 (h0->priority_cfi_and_id);
162 *inner_id = tag & 0xfff;
164 *type = clib_net_to_host_u16(h0->type);
166 vlib_buffer_advance (b0, sizeof (h0[0]));
168 if (*type == ETHERNET_TYPE_VLAN) {
169 // More than double tagged packet
170 *match_flags = SUBINT_CONFIG_VALID | SUBINT_CONFIG_MATCH_3_TAG;
176 // Determine the subinterface for this packet, given the result of the
177 // vlan table lookups and vlan header parsing. Check the most specific
179 static_always_inline void
180 identify_subint (vnet_hw_interface_t * hi,
183 main_intf_t * main_intf,
184 vlan_intf_t * vlan_intf,
185 qinq_intf_t * qinq_intf,
186 u32 * new_sw_if_index,
192 matched = eth_identify_subint (hi, b0, match_flags,
193 main_intf, vlan_intf, qinq_intf,
194 new_sw_if_index, error0, is_l2);
198 // Perform L3 my-mac filter
199 // A unicast packet arriving on an L3 interface must have a dmac matching the interface mac.
200 // This is required for promiscuous mode, else we will forward packets we aren't supposed to.
202 ethernet_header_t * e0;
203 e0 = (void *) (b0->data + vnet_buffer (b0)->ethernet.start_of_ethernet_header);
205 if (!(ethernet_address_cast(e0->dst_address))) {
206 if (!eth_mac_equal((u8 *)e0, hi->hw_address)) {
207 *error0 = ETHERNET_ERROR_L3_MAC_MISMATCH;
212 // Check for down subinterface
213 *error0 = (*new_sw_if_index) != ~0 ? (*error0) : ETHERNET_ERROR_DOWN;
217 static_always_inline void
218 determine_next_node (ethernet_main_t * em,
219 ethernet_input_variant_t variant,
226 if (PREDICT_FALSE (*error0 != ETHERNET_ERROR_NONE)) {
227 // some error occurred
228 *next0 = ETHERNET_INPUT_NEXT_DROP;
230 *next0 = em->l2_next;
231 // record the L2 len and reset the buffer so the L2 header is preserved
232 vnet_buffer(b0)->l2.l2_len = b0->current_data;
233 vlib_buffer_advance (b0, -(b0->current_data));
235 // check for common IP/MPLS ethertypes
236 } else if (type0 == ETHERNET_TYPE_IP4) {
237 *next0 = em->l3_next.input_next_ip4;
238 } else if (type0 == ETHERNET_TYPE_IP6) {
239 *next0 = em->l3_next.input_next_ip6;
240 } else if (type0 == ETHERNET_TYPE_MPLS_UNICAST) {
241 *next0 = em->l3_next.input_next_mpls;
243 } else if (em->redirect_l3) {
244 // L3 Redirect is on, the cached common next nodes will be
245 // pointing to the redirect node, catch the uncommon types here
246 *next0 = em->redirect_l3_next;
248 // uncommon ethertype, check table
250 i0 = sparse_vec_index (em->l3_next.input_next_by_type, type0);
251 *next0 = vec_elt (em->l3_next.input_next_by_type, i0);
252 *error0 = i0 == SPARSE_VEC_INVALID_INDEX ? ETHERNET_ERROR_UNKNOWN_TYPE : *error0;
254 // The table is not populated with LLC values, so check that now.
255 // If variant is variant_ethernet then we came from LLC processing. Don't
256 // go back there; drop instead using by keeping the drop/bad table result.
257 if ((type0 < 0x600) && (variant == ETHERNET_INPUT_VARIANT_ETHERNET)) {
258 *next0 = ETHERNET_INPUT_NEXT_LLC;
263 static_always_inline uword
264 ethernet_input_inline (vlib_main_t * vm,
265 vlib_node_runtime_t * node,
266 vlib_frame_t * from_frame,
267 ethernet_input_variant_t variant)
269 vnet_main_t * vnm = vnet_get_main();
270 ethernet_main_t * em = ðernet_main;
271 vlib_node_runtime_t * error_node;
272 u32 n_left_from, next_index, * from, * to_next;
273 u32 stats_sw_if_index, stats_n_packets, stats_n_bytes;
274 u32 cpu_index = os_get_cpu_number();
276 if (variant != ETHERNET_INPUT_VARIANT_ETHERNET)
277 error_node = vlib_node_get_runtime (vm, ethernet_input_node.index);
281 from = vlib_frame_vector_args (from_frame);
282 n_left_from = from_frame->n_vectors;
284 if (node->flags & VLIB_NODE_FLAG_TRACE)
285 vlib_trace_frame_buffers_only (vm, node,
289 sizeof (ethernet_input_trace_t));
291 next_index = node->cached_next_index;
292 stats_sw_if_index = node->runtime_data[0];
293 stats_n_packets = stats_n_bytes = 0;
295 while (n_left_from > 0)
299 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
301 while (n_left_from >= 4 && n_left_to_next >= 2)
304 vlib_buffer_t * b0, * b1;
305 u8 next0, next1, error0, error1;
306 u16 type0, orig_type0, type1, orig_type1;
307 u16 outer_id0, inner_id0, outer_id1, inner_id1;
308 u32 match_flags0, match_flags1;
309 u32 old_sw_if_index0, new_sw_if_index0, len0, old_sw_if_index1, new_sw_if_index1, len1;
310 vnet_hw_interface_t * hi0, * hi1;
311 main_intf_t * main_intf0, * main_intf1;
312 vlan_intf_t * vlan_intf0, * vlan_intf1;
313 qinq_intf_t * qinq_intf0, * qinq_intf1;
316 /* Prefetch next iteration. */
318 vlib_buffer_t * b2, * b3;
320 b2 = vlib_get_buffer (vm, from[2]);
321 b3 = vlib_get_buffer (vm, from[3]);
323 vlib_prefetch_buffer_header (b2, STORE);
324 vlib_prefetch_buffer_header (b3, STORE);
326 CLIB_PREFETCH (b2->data, sizeof (ethernet_header_t), LOAD);
327 CLIB_PREFETCH (b3->data, sizeof (ethernet_header_t), LOAD);
339 b0 = vlib_get_buffer (vm, bi0);
340 b1 = vlib_get_buffer (vm, bi1);
342 error0 = error1 = ETHERNET_ERROR_NONE;
344 parse_header (variant,
352 parse_header (variant,
360 old_sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
361 old_sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_RX];
363 eth_vlan_table_lookups (em,
374 eth_vlan_table_lookups (em,
385 identify_subint (hi0,
395 identify_subint (hi1,
405 // Save RX sw_if_index for later nodes
406 vnet_buffer (b0)->sw_if_index[VLIB_RX] = error0 != ETHERNET_ERROR_NONE ? old_sw_if_index0 : new_sw_if_index0;
407 vnet_buffer (b1)->sw_if_index[VLIB_RX] = error1 != ETHERNET_ERROR_NONE ? old_sw_if_index1 : new_sw_if_index1;
409 // Check if there is a stat to take (valid and non-main sw_if_index for pkt 0 or pkt 1)
410 if (((new_sw_if_index0 != ~0) && (new_sw_if_index0 != old_sw_if_index0)) ||
411 ((new_sw_if_index1 != ~0) && (new_sw_if_index1 != old_sw_if_index1))) {
413 len0 = vlib_buffer_length_in_chain (vm, b0) + b0->current_data
414 - vnet_buffer (b0)->ethernet.start_of_ethernet_header;
415 len1 = vlib_buffer_length_in_chain (vm, b1) + b1->current_data
416 - vnet_buffer (b1)->ethernet.start_of_ethernet_header;
418 stats_n_packets += 2;
419 stats_n_bytes += len0 + len1;
421 if (PREDICT_FALSE (! (new_sw_if_index0 == stats_sw_if_index && new_sw_if_index1 == stats_sw_if_index)))
423 stats_n_packets -= 2;
424 stats_n_bytes -= len0 + len1;
426 if (new_sw_if_index0 != old_sw_if_index0 && new_sw_if_index0 != ~0)
427 vlib_increment_combined_counter
428 (vnm->interface_main.combined_sw_if_counters
429 + VNET_INTERFACE_COUNTER_RX,
434 if (new_sw_if_index1 != old_sw_if_index1 && new_sw_if_index1 != ~0)
435 vlib_increment_combined_counter
436 (vnm->interface_main.combined_sw_if_counters
437 + VNET_INTERFACE_COUNTER_RX,
443 if (new_sw_if_index0 == new_sw_if_index1)
445 if (stats_n_packets > 0)
447 vlib_increment_combined_counter
448 (vnm->interface_main.combined_sw_if_counters
449 + VNET_INTERFACE_COUNTER_RX,
454 stats_n_packets = stats_n_bytes = 0;
456 stats_sw_if_index = new_sw_if_index0;
461 if (variant == ETHERNET_INPUT_VARIANT_NOT_L2)
464 determine_next_node(em, variant, is_l20, type0, b0, &error0, &next0);
465 determine_next_node(em, variant, is_l21, type1, b1, &error1, &next1);
467 b0->error = error_node->errors[error0];
468 b1->error = error_node->errors[error1];
470 // verify speculative enqueue
471 vlib_validate_buffer_enqueue_x2(vm,node,next_index,to_next,n_left_to_next,bi0,bi1,next0,next1);
474 while (n_left_from > 0 && n_left_to_next > 0)
479 u16 type0, orig_type0;
480 u16 outer_id0, inner_id0;
482 u32 old_sw_if_index0, new_sw_if_index0, len0;
483 vnet_hw_interface_t * hi0;
484 main_intf_t * main_intf0;
485 vlan_intf_t * vlan_intf0;
486 qinq_intf_t * qinq_intf0;
489 // Prefetch next iteration
490 if (n_left_from > 1) {
493 p2 = vlib_get_buffer (vm, from[1]);
494 vlib_prefetch_buffer_header (p2, STORE);
495 CLIB_PREFETCH (p2->data, CLIB_CACHE_LINE_BYTES, LOAD);
505 b0 = vlib_get_buffer (vm, bi0);
507 error0 = ETHERNET_ERROR_NONE;
509 parse_header (variant,
517 old_sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
519 eth_vlan_table_lookups (em,
530 identify_subint (hi0,
540 // Save RX sw_if_index for later nodes
541 vnet_buffer (b0)->sw_if_index[VLIB_RX] = error0 != ETHERNET_ERROR_NONE ? old_sw_if_index0 : new_sw_if_index0;
543 // Increment subinterface stats
544 // Note that interface-level counters have already been incremented
545 // prior to calling this function. Thus only subinterface counters
546 // are incremented here.
548 // Interface level counters include packets received on the main
549 // interface and all subinterfaces. Subinterface level counters
550 // include only those packets received on that subinterface
551 // Increment stats if the subint is valid and it is not the main intf
552 if ((new_sw_if_index0 != ~0) && (new_sw_if_index0 != old_sw_if_index0)) {
554 len0 = vlib_buffer_length_in_chain (vm, b0) + b0->current_data
555 - vnet_buffer (b0)->ethernet.start_of_ethernet_header;
557 stats_n_packets += 1;
558 stats_n_bytes += len0;
560 // Batch stat increments from the same subinterface so counters
561 // don't need to be incremented for every packet.
562 if (PREDICT_FALSE (new_sw_if_index0 != stats_sw_if_index)) {
563 stats_n_packets -= 1;
564 stats_n_bytes -= len0;
566 if (new_sw_if_index0 != ~0)
567 vlib_increment_combined_counter
568 (vnm->interface_main.combined_sw_if_counters
569 + VNET_INTERFACE_COUNTER_RX,
574 if (stats_n_packets > 0) {
575 vlib_increment_combined_counter
576 (vnm->interface_main.combined_sw_if_counters
577 + VNET_INTERFACE_COUNTER_RX,
582 stats_n_packets = stats_n_bytes = 0;
584 stats_sw_if_index = new_sw_if_index0;
588 if (variant == ETHERNET_INPUT_VARIANT_NOT_L2)
591 determine_next_node(em, variant, is_l20, type0, b0, &error0, &next0);
593 b0->error = error_node->errors[error0];
595 // verify speculative enqueue
596 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
597 to_next, n_left_to_next,
601 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
604 // Increment any remaining batched stats
605 if (stats_n_packets > 0)
607 vlib_increment_combined_counter
608 (vnm->interface_main.combined_sw_if_counters
609 + VNET_INTERFACE_COUNTER_RX,
614 node->runtime_data[0] = stats_sw_if_index;
617 return from_frame->n_vectors;
621 ethernet_input (vlib_main_t * vm,
622 vlib_node_runtime_t * node,
623 vlib_frame_t * from_frame)
624 { return ethernet_input_inline (vm, node, from_frame, ETHERNET_INPUT_VARIANT_ETHERNET); }
627 ethernet_input_type (vlib_main_t * vm,
628 vlib_node_runtime_t * node,
629 vlib_frame_t * from_frame)
630 { return ethernet_input_inline (vm, node, from_frame, ETHERNET_INPUT_VARIANT_ETHERNET_TYPE); }
633 ethernet_input_not_l2 (vlib_main_t * vm,
634 vlib_node_runtime_t * node,
635 vlib_frame_t * from_frame)
636 { return ethernet_input_inline (vm, node, from_frame, ETHERNET_INPUT_VARIANT_NOT_L2); }
639 // Return the subinterface config struct for the given sw_if_index
640 // Also return via parameter the appropriate match flags for the
641 // configured number of tags.
642 // On error (unsupported or not ethernet) return 0.
643 static subint_config_t *
644 ethernet_sw_interface_get_config (vnet_main_t * vnm,
648 ethernet_main_t * em = ðernet_main;
649 vnet_hw_interface_t * hi;
650 vnet_sw_interface_t * si;
651 main_intf_t * main_intf;
652 vlan_table_t * vlan_table;
653 qinq_table_t * qinq_table;
654 subint_config_t * subint = 0;
656 hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
658 if (!hi || (hi->hw_class_index != ethernet_hw_interface_class.index)) {
660 goto done; // non-ethernet interface
663 // ensure there's an entry for the main intf (shouldn't really be necessary)
664 vec_validate (em->main_intfs, hi->hw_if_index);
665 main_intf = vec_elt_at_index (em->main_intfs, hi->hw_if_index);
667 // Locate the subint for the given ethernet config
668 si = vnet_get_sw_interface (vnm, sw_if_index);
670 if (si->sub.eth.flags.default_sub) {
671 subint = &main_intf->default_subint;
672 *flags = SUBINT_CONFIG_MATCH_0_TAG |
673 SUBINT_CONFIG_MATCH_1_TAG |
674 SUBINT_CONFIG_MATCH_2_TAG |
675 SUBINT_CONFIG_MATCH_3_TAG;
676 } else if ((si->sub.eth.flags.no_tags) ||
677 (si->sub.eth.raw_flags == 0)) {
678 // if no flags are set then this is a main interface
679 // so treat as untagged
680 subint = &main_intf->untagged_subint;
681 *flags = SUBINT_CONFIG_MATCH_0_TAG;
684 // first get the vlan table
685 if (si->sub.eth.flags.dot1ad) {
686 if (main_intf->dot1ad_vlans == 0) {
687 // Allocate a vlan table from the pool
688 pool_get(em->vlan_pool, vlan_table);
689 main_intf->dot1ad_vlans = vlan_table - em->vlan_pool;
691 // Get ptr to existing vlan table
692 vlan_table = vec_elt_at_index (em->vlan_pool, main_intf->dot1ad_vlans);
695 if (main_intf->dot1q_vlans == 0) {
696 // Allocate a vlan table from the pool
697 pool_get(em->vlan_pool, vlan_table);
698 main_intf->dot1q_vlans = vlan_table - em->vlan_pool;
700 // Get ptr to existing vlan table
701 vlan_table = vec_elt_at_index (em->vlan_pool, main_intf->dot1q_vlans);
705 if (si->sub.eth.flags.one_tag) {
706 *flags = si->sub.eth.flags.exact_match ?
707 SUBINT_CONFIG_MATCH_1_TAG :
708 (SUBINT_CONFIG_MATCH_1_TAG |
709 SUBINT_CONFIG_MATCH_2_TAG |
710 SUBINT_CONFIG_MATCH_3_TAG);
712 if (si->sub.eth.flags.outer_vlan_id_any) {
713 // not implemented yet
717 // a single vlan, a common case
718 subint = &vlan_table->vlans[si->sub.eth.outer_vlan_id].single_tag_subint;
723 *flags = si->sub.eth.flags.exact_match ?
724 SUBINT_CONFIG_MATCH_2_TAG :
725 (SUBINT_CONFIG_MATCH_2_TAG |
726 SUBINT_CONFIG_MATCH_3_TAG);
728 if (si->sub.eth.flags.outer_vlan_id_any && si->sub.eth.flags.inner_vlan_id_any) {
729 // not implemented yet
734 if (si->sub.eth.flags.inner_vlan_id_any) {
735 // a specific outer and "any" inner
736 // don't need a qinq table for this
737 subint = &vlan_table->vlans[si->sub.eth.outer_vlan_id].inner_any_subint;
738 if (si->sub.eth.flags.exact_match) {
739 *flags = SUBINT_CONFIG_MATCH_2_TAG;
741 *flags = SUBINT_CONFIG_MATCH_2_TAG |
742 SUBINT_CONFIG_MATCH_3_TAG;
745 // a specific outer + specifc innner vlan id, a common case
747 // get the qinq table
748 if (vlan_table->vlans[si->sub.eth.outer_vlan_id].qinqs == 0) {
749 // Allocate a qinq table from the pool
750 pool_get(em->qinq_pool, qinq_table);
751 vlan_table->vlans[si->sub.eth.outer_vlan_id].qinqs = qinq_table - em->qinq_pool;
753 // Get ptr to existing qinq table
754 qinq_table = vec_elt_at_index (em->qinq_pool, vlan_table->vlans[si->sub.eth.outer_vlan_id].qinqs);
756 subint = &qinq_table->vlans[si->sub.eth.inner_vlan_id].subint;
766 ethernet_sw_interface_up_down (vnet_main_t * vnm,
770 subint_config_t * subint;
773 clib_error_t * error = 0;
775 // Find the config for this subinterface
776 subint = ethernet_sw_interface_get_config (vnm, sw_if_index, &dummy_flags, &dummy_unsup);
779 // not implemented yet or not ethernet
783 subint->sw_if_index =
784 ((flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) ? sw_if_index : ~0);
790 VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION (ethernet_sw_interface_up_down);
793 // Set the L2/L3 mode for the subinterface
795 ethernet_sw_interface_set_l2_mode (vnet_main_t * vnm,
799 subint_config_t *subint;
803 vnet_sw_interface_t * sw = vnet_get_sw_interface (vnm, sw_if_index);
805 is_port = !(sw->type == VNET_SW_INTERFACE_TYPE_SUB);
807 // Find the config for this subinterface
808 subint = ethernet_sw_interface_get_config (vnm, sw_if_index, &dummy_flags, &dummy_unsup);
811 // unimplemented or not ethernet
815 // Double check that the config we found is for our interface (or the interface is down)
816 ASSERT ((subint->sw_if_index == sw_if_index) | (subint->sw_if_index == ~0));
819 subint->flags |= SUBINT_CONFIG_L2;
822 SUBINT_CONFIG_MATCH_0_TAG | SUBINT_CONFIG_MATCH_1_TAG
823 | SUBINT_CONFIG_MATCH_2_TAG | SUBINT_CONFIG_MATCH_3_TAG;
825 subint->flags &= ~SUBINT_CONFIG_L2;
828 ~(SUBINT_CONFIG_MATCH_1_TAG | SUBINT_CONFIG_MATCH_2_TAG
829 | SUBINT_CONFIG_MATCH_3_TAG);
837 static clib_error_t *
838 ethernet_sw_interface_add_del (vnet_main_t * vnm,
842 clib_error_t * error = 0;
843 subint_config_t *subint;
847 // Find the config for this subinterface
848 subint = ethernet_sw_interface_get_config (vnm, sw_if_index, &match_flags, &unsupported);
851 // not implemented yet or not ethernet
853 // this is the NYI case
854 error = clib_error_return (0, "not implemented yet");
864 // Initialize the subint
865 if (subint->flags & SUBINT_CONFIG_VALID) {
866 // Error vlan already in use
867 error = clib_error_return (0, "vlan is already in use");
869 // Note that config is L3 by defaulty
870 subint->flags = SUBINT_CONFIG_VALID | match_flags;
871 subint->sw_if_index = ~0; // because interfaces are initially down
878 VNET_SW_INTERFACE_ADD_DEL_FUNCTION (ethernet_sw_interface_add_del);
880 static char * ethernet_error_strings[] = {
881 #define ethernet_error(n,c,s) s,
883 #undef ethernet_error
886 VLIB_REGISTER_NODE (ethernet_input_node) = {
887 .function = ethernet_input,
888 .name = "ethernet-input",
889 /* Takes a vector of packets. */
890 .vector_size = sizeof (u32),
892 .n_errors = ETHERNET_N_ERROR,
893 .error_strings = ethernet_error_strings,
895 .n_next_nodes = ETHERNET_INPUT_N_NEXT,
897 #define _(s,n) [ETHERNET_INPUT_NEXT_##s] = n,
898 foreach_ethernet_input_next
902 .format_buffer = format_ethernet_header_with_length,
903 .format_trace = format_ethernet_input_trace,
904 .unformat_buffer = unformat_ethernet_header,
907 VLIB_REGISTER_NODE (ethernet_input_type_node,static) = {
908 .function = ethernet_input_type,
909 .name = "ethernet-input-type",
910 /* Takes a vector of packets. */
911 .vector_size = sizeof (u32),
913 .n_next_nodes = ETHERNET_INPUT_N_NEXT,
915 #define _(s,n) [ETHERNET_INPUT_NEXT_##s] = n,
916 foreach_ethernet_input_next
921 VLIB_REGISTER_NODE (ethernet_input_not_l2_node,static) = {
922 .function = ethernet_input_not_l2,
923 .name = "ethernet-input-not-l2",
924 /* Takes a vector of packets. */
925 .vector_size = sizeof (u32),
927 .n_next_nodes = ETHERNET_INPUT_N_NEXT,
929 #define _(s,n) [ETHERNET_INPUT_NEXT_##s] = n,
930 foreach_ethernet_input_next
935 void ethernet_set_rx_redirect (vnet_main_t * vnm,
936 vnet_hw_interface_t * hi,
939 // Insure all packets go to ethernet-input (i.e. untagged ipv4 packets
940 // don't go directly to ip4-input)
941 vnet_hw_interface_rx_redirect_to_node
942 (vnm, hi->hw_if_index, enable ? ethernet_input_node.index : ~0);
947 * Initialization and registration for the next_by_ethernet structure
950 clib_error_t * next_by_ethertype_init (next_by_ethertype_t * l3_next)
952 l3_next->input_next_by_type = sparse_vec_new
953 (/* elt bytes */ sizeof (l3_next->input_next_by_type[0]),
954 /* bits in index */ BITS (((ethernet_header_t *) 0)->type));
956 vec_validate (l3_next->sparse_index_by_input_next_index, ETHERNET_INPUT_NEXT_DROP);
957 vec_validate (l3_next->sparse_index_by_input_next_index, ETHERNET_INPUT_NEXT_PUNT);
958 l3_next->sparse_index_by_input_next_index[ETHERNET_INPUT_NEXT_DROP]
959 = SPARSE_VEC_INVALID_INDEX;
960 l3_next->sparse_index_by_input_next_index[ETHERNET_INPUT_NEXT_PUNT]
961 = SPARSE_VEC_INVALID_INDEX;
966 // Add an ethertype -> next index mapping to the structure
967 clib_error_t * next_by_ethertype_register (next_by_ethertype_t * l3_next,
973 ethernet_main_t * em = ðernet_main;
975 /* Setup ethernet type -> next index sparse vector mapping. */
976 n = sparse_vec_validate (l3_next->input_next_by_type, ethertype);
979 /* Rebuild next index -> sparse index inverse mapping when sparse vector
981 vec_validate (l3_next->sparse_index_by_input_next_index, next_index);
982 for (i = 1; i < vec_len (l3_next->input_next_by_type); i++)
983 l3_next->sparse_index_by_input_next_index[l3_next->input_next_by_type[i]] = i;
985 // do not allow the cached next index's to be updated if L3
986 // redirect is enabled, as it will have overwritten them
987 if (!em->redirect_l3) {
988 // Cache common ethertypes directly
989 if (ethertype == ETHERNET_TYPE_IP4) {
990 l3_next->input_next_ip4 = next_index;
991 } else if (ethertype == ETHERNET_TYPE_IP6) {
992 l3_next->input_next_ip6 = next_index;
993 } else if (ethertype == ETHERNET_TYPE_MPLS_UNICAST) {
994 l3_next->input_next_mpls = next_index;
1001 static clib_error_t * ethernet_input_init (vlib_main_t * vm)
1003 ethernet_main_t * em = ðernet_main;
1004 __attribute__((unused)) vlan_table_t * invalid_vlan_table;
1005 __attribute__((unused)) qinq_table_t * invalid_qinq_table;
1007 ethernet_setup_node (vm, ethernet_input_node.index);
1008 ethernet_setup_node (vm, ethernet_input_type_node.index);
1009 ethernet_setup_node (vm, ethernet_input_not_l2_node.index);
1011 next_by_ethertype_init (&em->l3_next);
1013 // Initialize pools and vector for vlan parsing
1014 vec_validate (em->main_intfs, 10); // 10 main interfaces
1015 pool_alloc(em->vlan_pool, 10);
1016 pool_alloc(em->qinq_pool, 1);
1018 // The first vlan pool will always be reserved for an invalid table
1019 pool_get(em->vlan_pool, invalid_vlan_table); // first id = 0
1020 // The first qinq pool will always be reserved for an invalid table
1021 pool_get(em->qinq_pool, invalid_qinq_table); // first id = 0
1026 VLIB_INIT_FUNCTION (ethernet_input_init);
1029 ethernet_register_input_type (vlib_main_t * vm,
1030 ethernet_type_t type,
1033 ethernet_main_t * em = ðernet_main;
1034 ethernet_type_info_t * ti;
1038 clib_error_t * error = vlib_call_init_function (vm, ethernet_init);
1040 clib_error_report (error);
1043 ti = ethernet_get_type_info (em, type);
1044 ti->node_index = node_index;
1045 ti->next_index = vlib_node_add_next (vm,
1046 ethernet_input_node.index,
1048 i = vlib_node_add_next (vm,
1049 ethernet_input_type_node.index,
1051 ASSERT (i == ti->next_index);
1053 i = vlib_node_add_next (vm,
1054 ethernet_input_not_l2_node.index,
1056 ASSERT (i == ti->next_index);
1058 // Add the L3 node for this ethertype to the next nodes structure
1059 next_by_ethertype_register (&em->l3_next, type, ti->next_index);
1061 // Call the registration functions for other nodes that want a mapping
1062 l2bvi_register_input_type (vm, type, node_index);
1066 ethernet_register_l2_input (vlib_main_t * vm,
1069 ethernet_main_t * em = ðernet_main;
1072 em->l2_next = vlib_node_add_next (vm, ethernet_input_node.index, node_index);
1075 * Even if we never use these arcs, we have to align the next indices...
1077 i = vlib_node_add_next (vm, ethernet_input_type_node.index, node_index);
1079 ASSERT (i == em->l2_next);
1081 i = vlib_node_add_next (vm,
1082 ethernet_input_not_l2_node.index,
1084 ASSERT (i == em->l2_next);
1087 // Register a next node for L3 redirect, and enable L3 redirect
1089 ethernet_register_l3_redirect (vlib_main_t * vm,
1092 ethernet_main_t * em = ðernet_main;
1095 em->redirect_l3 = 1;
1096 em->redirect_l3_next = vlib_node_add_next(vm,
1097 ethernet_input_node.index,
1100 * Change the cached next nodes to the redirect node
1102 em->l3_next.input_next_ip4 = em->redirect_l3_next;
1103 em->l3_next.input_next_ip6 = em->redirect_l3_next;
1104 em->l3_next.input_next_mpls = em->redirect_l3_next;
1107 * Even if we never use these arcs, we have to align the next indices...
1109 i = vlib_node_add_next (vm, ethernet_input_type_node.index, node_index);
1111 ASSERT (i == em->redirect_l3_next);