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,
103 if (variant == ETHERNET_INPUT_VARIANT_ETHERNET
104 || variant == ETHERNET_INPUT_VARIANT_NOT_L2) {
105 ethernet_header_t * e0;
107 e0 = (void *) (b0->data + b0->current_data);
109 vnet_buffer (b0)->ethernet.start_of_ethernet_header = b0->current_data;
111 vlib_buffer_advance (b0, sizeof (e0[0]));
113 *type = clib_net_to_host_u16(e0->type);
114 } else if (variant == ETHERNET_INPUT_VARIANT_ETHERNET_TYPE) {
115 // here when prior node was LLC/SNAP processing
118 e0 = (void *) (b0->data + b0->current_data);
120 vlib_buffer_advance (b0, sizeof (e0[0]));
122 *type = clib_net_to_host_u16(e0[0]);
125 // save for distinguishing between dot1q and dot1ad later
128 // default the tags to 0 (used if there is no corresponding tag)
132 *match_flags = SUBINT_CONFIG_VALID | SUBINT_CONFIG_MATCH_0_TAG;
135 // check for vlan encaps
136 if ((*type == ETHERNET_TYPE_VLAN) ||
137 (*type == ETHERNET_TYPE_DOT1AD) ||
138 (*type == ETHERNET_TYPE_VLAN_9100) ||
139 (*type == ETHERNET_TYPE_VLAN_9200))
141 ethernet_vlan_header_t * h0;
144 *match_flags = SUBINT_CONFIG_VALID | SUBINT_CONFIG_MATCH_1_TAG;
146 h0 = (void *) (b0->data + b0->current_data);
148 tag = clib_net_to_host_u16 (h0->priority_cfi_and_id);
150 *outer_id = tag & 0xfff;
152 *type = clib_net_to_host_u16(h0->type);
154 vlib_buffer_advance (b0, sizeof (h0[0]));
157 if (*type == ETHERNET_TYPE_VLAN) {
158 // Double tagged packet
159 *match_flags = SUBINT_CONFIG_VALID | SUBINT_CONFIG_MATCH_2_TAG;
161 h0 = (void *) (b0->data + b0->current_data);
163 tag = clib_net_to_host_u16 (h0->priority_cfi_and_id);
165 *inner_id = tag & 0xfff;
167 *type = clib_net_to_host_u16(h0->type);
169 vlib_buffer_advance (b0, sizeof (h0[0]));
172 if (*type == ETHERNET_TYPE_VLAN) {
173 // More than double tagged packet
174 *match_flags = SUBINT_CONFIG_VALID | SUBINT_CONFIG_MATCH_3_TAG;
175 vlan_count = 3; // "unknown" number, aka, 3-or-more
179 ethernet_buffer_set_vlan_count(b0, vlan_count);
182 // Determine the subinterface for this packet, given the result of the
183 // vlan table lookups and vlan header parsing. Check the most specific
185 static_always_inline void
186 identify_subint (vnet_hw_interface_t * hi,
189 main_intf_t * main_intf,
190 vlan_intf_t * vlan_intf,
191 qinq_intf_t * qinq_intf,
192 u32 * new_sw_if_index,
198 matched = eth_identify_subint (hi, b0, match_flags,
199 main_intf, vlan_intf, qinq_intf,
200 new_sw_if_index, error0, is_l2);
204 // Perform L3 my-mac filter
205 // A unicast packet arriving on an L3 interface must have a dmac matching the interface mac.
206 // This is required for promiscuous mode, else we will forward packets we aren't supposed to.
208 ethernet_header_t * e0;
209 e0 = (void *) (b0->data + vnet_buffer (b0)->ethernet.start_of_ethernet_header);
211 if (!(ethernet_address_cast(e0->dst_address))) {
212 if (!eth_mac_equal((u8 *)e0, hi->hw_address)) {
213 *error0 = ETHERNET_ERROR_L3_MAC_MISMATCH;
218 // Check for down subinterface
219 *error0 = (*new_sw_if_index) != ~0 ? (*error0) : ETHERNET_ERROR_DOWN;
223 static_always_inline void
224 determine_next_node (ethernet_main_t * em,
225 ethernet_input_variant_t variant,
232 if (PREDICT_FALSE (*error0 != ETHERNET_ERROR_NONE)) {
233 // some error occurred
234 *next0 = ETHERNET_INPUT_NEXT_DROP;
236 *next0 = em->l2_next;
237 // record the L2 len and reset the buffer so the L2 header is preserved
238 vnet_buffer(b0)->l2.l2_len = b0->current_data;
239 vlib_buffer_advance(b0, - ethernet_buffer_header_size(b0));
241 // check for common IP/MPLS ethertypes
242 } else if (type0 == ETHERNET_TYPE_IP4) {
243 *next0 = em->l3_next.input_next_ip4;
244 } else if (type0 == ETHERNET_TYPE_IP6) {
245 *next0 = em->l3_next.input_next_ip6;
246 } else if (type0 == ETHERNET_TYPE_MPLS_UNICAST) {
247 *next0 = em->l3_next.input_next_mpls;
249 } else if (em->redirect_l3) {
250 // L3 Redirect is on, the cached common next nodes will be
251 // pointing to the redirect node, catch the uncommon types here
252 *next0 = em->redirect_l3_next;
254 // uncommon ethertype, check table
256 i0 = sparse_vec_index (em->l3_next.input_next_by_type, type0);
257 *next0 = vec_elt (em->l3_next.input_next_by_type, i0);
258 *error0 = i0 == SPARSE_VEC_INVALID_INDEX ? ETHERNET_ERROR_UNKNOWN_TYPE : *error0;
260 // The table is not populated with LLC values, so check that now.
261 // If variant is variant_ethernet then we came from LLC processing. Don't
262 // go back there; drop instead using by keeping the drop/bad table result.
263 if ((type0 < 0x600) && (variant == ETHERNET_INPUT_VARIANT_ETHERNET)) {
264 *next0 = ETHERNET_INPUT_NEXT_LLC;
269 static_always_inline uword
270 ethernet_input_inline (vlib_main_t * vm,
271 vlib_node_runtime_t * node,
272 vlib_frame_t * from_frame,
273 ethernet_input_variant_t variant)
275 vnet_main_t * vnm = vnet_get_main();
276 ethernet_main_t * em = ðernet_main;
277 vlib_node_runtime_t * error_node;
278 u32 n_left_from, next_index, * from, * to_next;
279 u32 stats_sw_if_index, stats_n_packets, stats_n_bytes;
280 u32 cpu_index = os_get_cpu_number();
282 if (variant != ETHERNET_INPUT_VARIANT_ETHERNET)
283 error_node = vlib_node_get_runtime (vm, ethernet_input_node.index);
287 from = vlib_frame_vector_args (from_frame);
288 n_left_from = from_frame->n_vectors;
290 if (node->flags & VLIB_NODE_FLAG_TRACE)
291 vlib_trace_frame_buffers_only (vm, node,
295 sizeof (ethernet_input_trace_t));
297 next_index = node->cached_next_index;
298 stats_sw_if_index = node->runtime_data[0];
299 stats_n_packets = stats_n_bytes = 0;
301 while (n_left_from > 0)
305 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
307 while (n_left_from >= 4 && n_left_to_next >= 2)
310 vlib_buffer_t * b0, * b1;
311 u8 next0, next1, error0, error1;
312 u16 type0, orig_type0, type1, orig_type1;
313 u16 outer_id0, inner_id0, outer_id1, inner_id1;
314 u32 match_flags0, match_flags1;
315 u32 old_sw_if_index0, new_sw_if_index0, len0, old_sw_if_index1, new_sw_if_index1, len1;
316 vnet_hw_interface_t * hi0, * hi1;
317 main_intf_t * main_intf0, * main_intf1;
318 vlan_intf_t * vlan_intf0, * vlan_intf1;
319 qinq_intf_t * qinq_intf0, * qinq_intf1;
322 /* Prefetch next iteration. */
324 vlib_buffer_t * b2, * b3;
326 b2 = vlib_get_buffer (vm, from[2]);
327 b3 = vlib_get_buffer (vm, from[3]);
329 vlib_prefetch_buffer_header (b2, STORE);
330 vlib_prefetch_buffer_header (b3, STORE);
332 CLIB_PREFETCH (b2->data, sizeof (ethernet_header_t), LOAD);
333 CLIB_PREFETCH (b3->data, sizeof (ethernet_header_t), LOAD);
345 b0 = vlib_get_buffer (vm, bi0);
346 b1 = vlib_get_buffer (vm, bi1);
348 error0 = error1 = ETHERNET_ERROR_NONE;
350 parse_header (variant,
358 parse_header (variant,
366 old_sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
367 old_sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_RX];
369 eth_vlan_table_lookups (em,
380 eth_vlan_table_lookups (em,
391 identify_subint (hi0,
401 identify_subint (hi1,
411 // Save RX sw_if_index for later nodes
412 vnet_buffer (b0)->sw_if_index[VLIB_RX] = error0 != ETHERNET_ERROR_NONE ? old_sw_if_index0 : new_sw_if_index0;
413 vnet_buffer (b1)->sw_if_index[VLIB_RX] = error1 != ETHERNET_ERROR_NONE ? old_sw_if_index1 : new_sw_if_index1;
415 // Check if there is a stat to take (valid and non-main sw_if_index for pkt 0 or pkt 1)
416 if (((new_sw_if_index0 != ~0) && (new_sw_if_index0 != old_sw_if_index0)) ||
417 ((new_sw_if_index1 != ~0) && (new_sw_if_index1 != old_sw_if_index1))) {
419 len0 = vlib_buffer_length_in_chain (vm, b0) + b0->current_data
420 - vnet_buffer (b0)->ethernet.start_of_ethernet_header;
421 len1 = vlib_buffer_length_in_chain (vm, b1) + b1->current_data
422 - vnet_buffer (b1)->ethernet.start_of_ethernet_header;
424 stats_n_packets += 2;
425 stats_n_bytes += len0 + len1;
427 if (PREDICT_FALSE (! (new_sw_if_index0 == stats_sw_if_index && new_sw_if_index1 == stats_sw_if_index)))
429 stats_n_packets -= 2;
430 stats_n_bytes -= len0 + len1;
432 if (new_sw_if_index0 != old_sw_if_index0 && new_sw_if_index0 != ~0)
433 vlib_increment_combined_counter
434 (vnm->interface_main.combined_sw_if_counters
435 + VNET_INTERFACE_COUNTER_RX,
440 if (new_sw_if_index1 != old_sw_if_index1 && new_sw_if_index1 != ~0)
441 vlib_increment_combined_counter
442 (vnm->interface_main.combined_sw_if_counters
443 + VNET_INTERFACE_COUNTER_RX,
449 if (new_sw_if_index0 == new_sw_if_index1)
451 if (stats_n_packets > 0)
453 vlib_increment_combined_counter
454 (vnm->interface_main.combined_sw_if_counters
455 + VNET_INTERFACE_COUNTER_RX,
460 stats_n_packets = stats_n_bytes = 0;
462 stats_sw_if_index = new_sw_if_index0;
467 if (variant == ETHERNET_INPUT_VARIANT_NOT_L2)
470 determine_next_node(em, variant, is_l20, type0, b0, &error0, &next0);
471 determine_next_node(em, variant, is_l21, type1, b1, &error1, &next1);
473 b0->error = error_node->errors[error0];
474 b1->error = error_node->errors[error1];
476 // verify speculative enqueue
477 vlib_validate_buffer_enqueue_x2(vm,node,next_index,to_next,n_left_to_next,bi0,bi1,next0,next1);
480 while (n_left_from > 0 && n_left_to_next > 0)
485 u16 type0, orig_type0;
486 u16 outer_id0, inner_id0;
488 u32 old_sw_if_index0, new_sw_if_index0, len0;
489 vnet_hw_interface_t * hi0;
490 main_intf_t * main_intf0;
491 vlan_intf_t * vlan_intf0;
492 qinq_intf_t * qinq_intf0;
495 // Prefetch next iteration
496 if (n_left_from > 1) {
499 p2 = vlib_get_buffer (vm, from[1]);
500 vlib_prefetch_buffer_header (p2, STORE);
501 CLIB_PREFETCH (p2->data, CLIB_CACHE_LINE_BYTES, LOAD);
511 b0 = vlib_get_buffer (vm, bi0);
513 error0 = ETHERNET_ERROR_NONE;
515 parse_header (variant,
523 old_sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
525 eth_vlan_table_lookups (em,
536 identify_subint (hi0,
546 // Save RX sw_if_index for later nodes
547 vnet_buffer (b0)->sw_if_index[VLIB_RX] = error0 != ETHERNET_ERROR_NONE ? old_sw_if_index0 : new_sw_if_index0;
549 // Increment subinterface stats
550 // Note that interface-level counters have already been incremented
551 // prior to calling this function. Thus only subinterface counters
552 // are incremented here.
554 // Interface level counters include packets received on the main
555 // interface and all subinterfaces. Subinterface level counters
556 // include only those packets received on that subinterface
557 // Increment stats if the subint is valid and it is not the main intf
558 if ((new_sw_if_index0 != ~0) && (new_sw_if_index0 != old_sw_if_index0)) {
560 len0 = vlib_buffer_length_in_chain (vm, b0) + b0->current_data
561 - vnet_buffer (b0)->ethernet.start_of_ethernet_header;
563 stats_n_packets += 1;
564 stats_n_bytes += len0;
566 // Batch stat increments from the same subinterface so counters
567 // don't need to be incremented for every packet.
568 if (PREDICT_FALSE (new_sw_if_index0 != stats_sw_if_index)) {
569 stats_n_packets -= 1;
570 stats_n_bytes -= len0;
572 if (new_sw_if_index0 != ~0)
573 vlib_increment_combined_counter
574 (vnm->interface_main.combined_sw_if_counters
575 + VNET_INTERFACE_COUNTER_RX,
580 if (stats_n_packets > 0) {
581 vlib_increment_combined_counter
582 (vnm->interface_main.combined_sw_if_counters
583 + VNET_INTERFACE_COUNTER_RX,
588 stats_n_packets = stats_n_bytes = 0;
590 stats_sw_if_index = new_sw_if_index0;
594 if (variant == ETHERNET_INPUT_VARIANT_NOT_L2)
597 determine_next_node(em, variant, is_l20, type0, b0, &error0, &next0);
599 b0->error = error_node->errors[error0];
601 // verify speculative enqueue
602 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
603 to_next, n_left_to_next,
607 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
610 // Increment any remaining batched stats
611 if (stats_n_packets > 0)
613 vlib_increment_combined_counter
614 (vnm->interface_main.combined_sw_if_counters
615 + VNET_INTERFACE_COUNTER_RX,
620 node->runtime_data[0] = stats_sw_if_index;
623 return from_frame->n_vectors;
627 ethernet_input (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); }
633 ethernet_input_type (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_ETHERNET_TYPE); }
639 ethernet_input_not_l2 (vlib_main_t * vm,
640 vlib_node_runtime_t * node,
641 vlib_frame_t * from_frame)
642 { return ethernet_input_inline (vm, node, from_frame, ETHERNET_INPUT_VARIANT_NOT_L2); }
645 // Return the subinterface config struct for the given sw_if_index
646 // Also return via parameter the appropriate match flags for the
647 // configured number of tags.
648 // On error (unsupported or not ethernet) return 0.
649 static subint_config_t *
650 ethernet_sw_interface_get_config (vnet_main_t * vnm,
654 ethernet_main_t * em = ðernet_main;
655 vnet_hw_interface_t * hi;
656 vnet_sw_interface_t * si;
657 main_intf_t * main_intf;
658 vlan_table_t * vlan_table;
659 qinq_table_t * qinq_table;
660 subint_config_t * subint = 0;
662 hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
664 if (!hi || (hi->hw_class_index != ethernet_hw_interface_class.index)) {
666 goto done; // non-ethernet interface
669 // ensure there's an entry for the main intf (shouldn't really be necessary)
670 vec_validate (em->main_intfs, hi->hw_if_index);
671 main_intf = vec_elt_at_index (em->main_intfs, hi->hw_if_index);
673 // Locate the subint for the given ethernet config
674 si = vnet_get_sw_interface (vnm, sw_if_index);
676 if (si->sub.eth.flags.default_sub) {
677 subint = &main_intf->default_subint;
678 *flags = SUBINT_CONFIG_MATCH_0_TAG |
679 SUBINT_CONFIG_MATCH_1_TAG |
680 SUBINT_CONFIG_MATCH_2_TAG |
681 SUBINT_CONFIG_MATCH_3_TAG;
682 } else if ((si->sub.eth.flags.no_tags) ||
683 (si->sub.eth.raw_flags == 0)) {
684 // if no flags are set then this is a main interface
685 // so treat as untagged
686 subint = &main_intf->untagged_subint;
687 *flags = SUBINT_CONFIG_MATCH_0_TAG;
690 // first get the vlan table
691 if (si->sub.eth.flags.dot1ad) {
692 if (main_intf->dot1ad_vlans == 0) {
693 // Allocate a vlan table from the pool
694 pool_get(em->vlan_pool, vlan_table);
695 main_intf->dot1ad_vlans = vlan_table - em->vlan_pool;
697 // Get ptr to existing vlan table
698 vlan_table = vec_elt_at_index (em->vlan_pool, main_intf->dot1ad_vlans);
701 if (main_intf->dot1q_vlans == 0) {
702 // Allocate a vlan table from the pool
703 pool_get(em->vlan_pool, vlan_table);
704 main_intf->dot1q_vlans = vlan_table - em->vlan_pool;
706 // Get ptr to existing vlan table
707 vlan_table = vec_elt_at_index (em->vlan_pool, main_intf->dot1q_vlans);
711 if (si->sub.eth.flags.one_tag) {
712 *flags = si->sub.eth.flags.exact_match ?
713 SUBINT_CONFIG_MATCH_1_TAG :
714 (SUBINT_CONFIG_MATCH_1_TAG |
715 SUBINT_CONFIG_MATCH_2_TAG |
716 SUBINT_CONFIG_MATCH_3_TAG);
718 if (si->sub.eth.flags.outer_vlan_id_any) {
719 // not implemented yet
723 // a single vlan, a common case
724 subint = &vlan_table->vlans[si->sub.eth.outer_vlan_id].single_tag_subint;
729 *flags = si->sub.eth.flags.exact_match ?
730 SUBINT_CONFIG_MATCH_2_TAG :
731 (SUBINT_CONFIG_MATCH_2_TAG |
732 SUBINT_CONFIG_MATCH_3_TAG);
734 if (si->sub.eth.flags.outer_vlan_id_any && si->sub.eth.flags.inner_vlan_id_any) {
735 // not implemented yet
740 if (si->sub.eth.flags.inner_vlan_id_any) {
741 // a specific outer and "any" inner
742 // don't need a qinq table for this
743 subint = &vlan_table->vlans[si->sub.eth.outer_vlan_id].inner_any_subint;
744 if (si->sub.eth.flags.exact_match) {
745 *flags = SUBINT_CONFIG_MATCH_2_TAG;
747 *flags = SUBINT_CONFIG_MATCH_2_TAG |
748 SUBINT_CONFIG_MATCH_3_TAG;
751 // a specific outer + specifc innner vlan id, a common case
753 // get the qinq table
754 if (vlan_table->vlans[si->sub.eth.outer_vlan_id].qinqs == 0) {
755 // Allocate a qinq table from the pool
756 pool_get(em->qinq_pool, qinq_table);
757 vlan_table->vlans[si->sub.eth.outer_vlan_id].qinqs = qinq_table - em->qinq_pool;
759 // Get ptr to existing qinq table
760 qinq_table = vec_elt_at_index (em->qinq_pool, vlan_table->vlans[si->sub.eth.outer_vlan_id].qinqs);
762 subint = &qinq_table->vlans[si->sub.eth.inner_vlan_id].subint;
772 ethernet_sw_interface_up_down (vnet_main_t * vnm,
776 subint_config_t * subint;
779 clib_error_t * error = 0;
781 // Find the config for this subinterface
782 subint = ethernet_sw_interface_get_config (vnm, sw_if_index, &dummy_flags, &dummy_unsup);
785 // not implemented yet or not ethernet
789 subint->sw_if_index =
790 ((flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) ? sw_if_index : ~0);
796 VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION (ethernet_sw_interface_up_down);
799 // Set the L2/L3 mode for the subinterface
801 ethernet_sw_interface_set_l2_mode (vnet_main_t * vnm,
805 subint_config_t *subint;
809 vnet_sw_interface_t * sw = vnet_get_sw_interface (vnm, sw_if_index);
811 is_port = !(sw->type == VNET_SW_INTERFACE_TYPE_SUB);
813 // Find the config for this subinterface
814 subint = ethernet_sw_interface_get_config (vnm, sw_if_index, &dummy_flags, &dummy_unsup);
817 // unimplemented or not ethernet
821 // Double check that the config we found is for our interface (or the interface is down)
822 ASSERT ((subint->sw_if_index == sw_if_index) | (subint->sw_if_index == ~0));
825 subint->flags |= SUBINT_CONFIG_L2;
828 SUBINT_CONFIG_MATCH_0_TAG | SUBINT_CONFIG_MATCH_1_TAG
829 | SUBINT_CONFIG_MATCH_2_TAG | SUBINT_CONFIG_MATCH_3_TAG;
831 subint->flags &= ~SUBINT_CONFIG_L2;
834 ~(SUBINT_CONFIG_MATCH_1_TAG | SUBINT_CONFIG_MATCH_2_TAG
835 | SUBINT_CONFIG_MATCH_3_TAG);
843 static clib_error_t *
844 ethernet_sw_interface_add_del (vnet_main_t * vnm,
848 clib_error_t * error = 0;
849 subint_config_t *subint;
853 // Find the config for this subinterface
854 subint = ethernet_sw_interface_get_config (vnm, sw_if_index, &match_flags, &unsupported);
857 // not implemented yet or not ethernet
859 // this is the NYI case
860 error = clib_error_return (0, "not implemented yet");
870 // Initialize the subint
871 if (subint->flags & SUBINT_CONFIG_VALID) {
872 // Error vlan already in use
873 error = clib_error_return (0, "vlan is already in use");
875 // Note that config is L3 by defaulty
876 subint->flags = SUBINT_CONFIG_VALID | match_flags;
877 subint->sw_if_index = ~0; // because interfaces are initially down
884 VNET_SW_INTERFACE_ADD_DEL_FUNCTION (ethernet_sw_interface_add_del);
886 static char * ethernet_error_strings[] = {
887 #define ethernet_error(n,c,s) s,
889 #undef ethernet_error
892 VLIB_REGISTER_NODE (ethernet_input_node) = {
893 .function = ethernet_input,
894 .name = "ethernet-input",
895 /* Takes a vector of packets. */
896 .vector_size = sizeof (u32),
898 .n_errors = ETHERNET_N_ERROR,
899 .error_strings = ethernet_error_strings,
901 .n_next_nodes = ETHERNET_INPUT_N_NEXT,
903 #define _(s,n) [ETHERNET_INPUT_NEXT_##s] = n,
904 foreach_ethernet_input_next
908 .format_buffer = format_ethernet_header_with_length,
909 .format_trace = format_ethernet_input_trace,
910 .unformat_buffer = unformat_ethernet_header,
913 VLIB_REGISTER_NODE (ethernet_input_type_node,static) = {
914 .function = ethernet_input_type,
915 .name = "ethernet-input-type",
916 /* Takes a vector of packets. */
917 .vector_size = sizeof (u32),
919 .n_next_nodes = ETHERNET_INPUT_N_NEXT,
921 #define _(s,n) [ETHERNET_INPUT_NEXT_##s] = n,
922 foreach_ethernet_input_next
927 VLIB_REGISTER_NODE (ethernet_input_not_l2_node,static) = {
928 .function = ethernet_input_not_l2,
929 .name = "ethernet-input-not-l2",
930 /* Takes a vector of packets. */
931 .vector_size = sizeof (u32),
933 .n_next_nodes = ETHERNET_INPUT_N_NEXT,
935 #define _(s,n) [ETHERNET_INPUT_NEXT_##s] = n,
936 foreach_ethernet_input_next
941 void ethernet_set_rx_redirect (vnet_main_t * vnm,
942 vnet_hw_interface_t * hi,
945 // Insure all packets go to ethernet-input (i.e. untagged ipv4 packets
946 // don't go directly to ip4-input)
947 vnet_hw_interface_rx_redirect_to_node
948 (vnm, hi->hw_if_index, enable ? ethernet_input_node.index : ~0);
953 * Initialization and registration for the next_by_ethernet structure
956 clib_error_t * next_by_ethertype_init (next_by_ethertype_t * l3_next)
958 l3_next->input_next_by_type = sparse_vec_new
959 (/* elt bytes */ sizeof (l3_next->input_next_by_type[0]),
960 /* bits in index */ BITS (((ethernet_header_t *) 0)->type));
962 vec_validate (l3_next->sparse_index_by_input_next_index, ETHERNET_INPUT_NEXT_DROP);
963 vec_validate (l3_next->sparse_index_by_input_next_index, ETHERNET_INPUT_NEXT_PUNT);
964 l3_next->sparse_index_by_input_next_index[ETHERNET_INPUT_NEXT_DROP]
965 = SPARSE_VEC_INVALID_INDEX;
966 l3_next->sparse_index_by_input_next_index[ETHERNET_INPUT_NEXT_PUNT]
967 = SPARSE_VEC_INVALID_INDEX;
970 * Make sure we don't wipe out an ethernet registration by mistake
971 * Can happen if init function ordering constraints are missing.
975 ethernet_main_t * em = ðernet_main;
976 ASSERT(em->next_by_ethertype_register_called == 0);
982 // Add an ethertype -> next index mapping to the structure
983 clib_error_t * next_by_ethertype_register (next_by_ethertype_t * l3_next,
989 ethernet_main_t * em = ðernet_main;
993 ethernet_main_t * em = ðernet_main;
994 em->next_by_ethertype_register_called = 1;
997 /* Setup ethernet type -> next index sparse vector mapping. */
998 n = sparse_vec_validate (l3_next->input_next_by_type, ethertype);
1001 /* Rebuild next index -> sparse index inverse mapping when sparse vector
1003 vec_validate (l3_next->sparse_index_by_input_next_index, next_index);
1004 for (i = 1; i < vec_len (l3_next->input_next_by_type); i++)
1005 l3_next->sparse_index_by_input_next_index[l3_next->input_next_by_type[i]] = i;
1007 // do not allow the cached next index's to be updated if L3
1008 // redirect is enabled, as it will have overwritten them
1009 if (!em->redirect_l3) {
1010 // Cache common ethertypes directly
1011 if (ethertype == ETHERNET_TYPE_IP4) {
1012 l3_next->input_next_ip4 = next_index;
1013 } else if (ethertype == ETHERNET_TYPE_IP6) {
1014 l3_next->input_next_ip6 = next_index;
1015 } else if (ethertype == ETHERNET_TYPE_MPLS_UNICAST) {
1016 l3_next->input_next_mpls = next_index;
1023 static clib_error_t * ethernet_input_init (vlib_main_t * vm)
1025 ethernet_main_t * em = ðernet_main;
1026 __attribute__((unused)) vlan_table_t * invalid_vlan_table;
1027 __attribute__((unused)) qinq_table_t * invalid_qinq_table;
1029 ethernet_setup_node (vm, ethernet_input_node.index);
1030 ethernet_setup_node (vm, ethernet_input_type_node.index);
1031 ethernet_setup_node (vm, ethernet_input_not_l2_node.index);
1033 next_by_ethertype_init (&em->l3_next);
1035 // Initialize pools and vector for vlan parsing
1036 vec_validate (em->main_intfs, 10); // 10 main interfaces
1037 pool_alloc(em->vlan_pool, 10);
1038 pool_alloc(em->qinq_pool, 1);
1040 // The first vlan pool will always be reserved for an invalid table
1041 pool_get(em->vlan_pool, invalid_vlan_table); // first id = 0
1042 // The first qinq pool will always be reserved for an invalid table
1043 pool_get(em->qinq_pool, invalid_qinq_table); // first id = 0
1048 VLIB_INIT_FUNCTION (ethernet_input_init);
1051 ethernet_register_input_type (vlib_main_t * vm,
1052 ethernet_type_t type,
1055 ethernet_main_t * em = ðernet_main;
1056 ethernet_type_info_t * ti;
1060 clib_error_t * error = vlib_call_init_function (vm, ethernet_init);
1062 clib_error_report (error);
1065 ti = ethernet_get_type_info (em, type);
1066 ti->node_index = node_index;
1067 ti->next_index = vlib_node_add_next (vm,
1068 ethernet_input_node.index,
1070 i = vlib_node_add_next (vm,
1071 ethernet_input_type_node.index,
1073 ASSERT (i == ti->next_index);
1075 i = vlib_node_add_next (vm,
1076 ethernet_input_not_l2_node.index,
1078 ASSERT (i == ti->next_index);
1080 // Add the L3 node for this ethertype to the next nodes structure
1081 next_by_ethertype_register (&em->l3_next, type, ti->next_index);
1083 // Call the registration functions for other nodes that want a mapping
1084 l2bvi_register_input_type (vm, type, node_index);
1088 ethernet_register_l2_input (vlib_main_t * vm,
1091 ethernet_main_t * em = ðernet_main;
1094 em->l2_next = vlib_node_add_next (vm, ethernet_input_node.index, node_index);
1097 * Even if we never use these arcs, we have to align the next indices...
1099 i = vlib_node_add_next (vm, ethernet_input_type_node.index, node_index);
1101 ASSERT (i == em->l2_next);
1103 i = vlib_node_add_next (vm,
1104 ethernet_input_not_l2_node.index,
1106 ASSERT (i == em->l2_next);
1109 // Register a next node for L3 redirect, and enable L3 redirect
1111 ethernet_register_l3_redirect (vlib_main_t * vm,
1114 ethernet_main_t * em = ðernet_main;
1117 em->redirect_l3 = 1;
1118 em->redirect_l3_next = vlib_node_add_next(vm,
1119 ethernet_input_node.index,
1122 * Change the cached next nodes to the redirect node
1124 em->l3_next.input_next_ip4 = em->redirect_l3_next;
1125 em->l3_next.input_next_ip6 = em->redirect_l3_next;
1126 em->l3_next.input_next_mpls = em->redirect_l3_next;
1129 * Even if we never use these arcs, we have to align the next indices...
1131 i = vlib_node_add_next (vm, ethernet_input_type_node.index, node_index);
1133 ASSERT (i == em->redirect_l3_next);