| /* |
| * Copyright (c) 2015 Cisco and/or its affiliates. |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at: |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| /* |
| * ethernet_node.c: ethernet packet processing |
| * |
| * Copyright (c) 2008 Eliot Dresselhaus |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining |
| * a copy of this software and associated documentation files (the |
| * "Software"), to deal in the Software without restriction, including |
| * without limitation the rights to use, copy, modify, merge, publish, |
| * distribute, sublicense, and/or sell copies of the Software, and to |
| * permit persons to whom the Software is furnished to do so, subject to |
| * the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be |
| * included in all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE |
| * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION |
| * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION |
| * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
| */ |
| |
| #include <vlib/vlib.h> |
| #include <vnet/pg/pg.h> |
| #include <vnet/ethernet/ethernet.h> |
| #include <vppinfra/sparse_vec.h> |
| #include <vnet/l2/l2_bvi.h> |
| |
| |
| #define foreach_ethernet_input_next \ |
| _ (PUNT, "error-punt") \ |
| _ (DROP, "error-drop") \ |
| _ (LLC, "llc-input") |
| |
| typedef enum |
| { |
| #define _(s,n) ETHERNET_INPUT_NEXT_##s, |
| foreach_ethernet_input_next |
| #undef _ |
| ETHERNET_INPUT_N_NEXT, |
| } ethernet_input_next_t; |
| |
| typedef struct |
| { |
| u8 packet_data[32]; |
| } ethernet_input_trace_t; |
| |
| static u8 * |
| format_ethernet_input_trace (u8 * s, va_list * va) |
| { |
| CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *); |
| CLIB_UNUSED (vlib_node_t * node) = va_arg (*va, vlib_node_t *); |
| ethernet_input_trace_t *t = va_arg (*va, ethernet_input_trace_t *); |
| |
| s = format (s, "%U", format_ethernet_header, t->packet_data); |
| |
| return s; |
| } |
| |
| vlib_node_registration_t ethernet_input_node; |
| |
| typedef enum |
| { |
| ETHERNET_INPUT_VARIANT_ETHERNET, |
| ETHERNET_INPUT_VARIANT_ETHERNET_TYPE, |
| ETHERNET_INPUT_VARIANT_NOT_L2, |
| } ethernet_input_variant_t; |
| |
| |
| // Parse the ethernet header to extract vlan tags and innermost ethertype |
| static_always_inline void |
| parse_header (ethernet_input_variant_t variant, |
| vlib_buffer_t * b0, |
| u16 * type, |
| u16 * orig_type, |
| u16 * outer_id, u16 * inner_id, u32 * match_flags) |
| { |
| u8 vlan_count; |
| |
| if (variant == ETHERNET_INPUT_VARIANT_ETHERNET |
| || variant == ETHERNET_INPUT_VARIANT_NOT_L2) |
| { |
| ethernet_header_t *e0; |
| |
| e0 = (void *) (b0->data + b0->current_data); |
| |
| vnet_buffer (b0)->ethernet.start_of_ethernet_header = b0->current_data; |
| |
| vlib_buffer_advance (b0, sizeof (e0[0])); |
| |
| *type = clib_net_to_host_u16 (e0->type); |
| } |
| else if (variant == ETHERNET_INPUT_VARIANT_ETHERNET_TYPE) |
| { |
| // here when prior node was LLC/SNAP processing |
| u16 *e0; |
| |
| e0 = (void *) (b0->data + b0->current_data); |
| |
| vlib_buffer_advance (b0, sizeof (e0[0])); |
| |
| *type = clib_net_to_host_u16 (e0[0]); |
| } |
| |
| // save for distinguishing between dot1q and dot1ad later |
| *orig_type = *type; |
| |
| // default the tags to 0 (used if there is no corresponding tag) |
| *outer_id = 0; |
| *inner_id = 0; |
| |
| *match_flags = SUBINT_CONFIG_VALID | SUBINT_CONFIG_MATCH_0_TAG; |
| vlan_count = 0; |
| |
| // check for vlan encaps |
| if (ethernet_frame_is_tagged (*type)) |
| { |
| ethernet_vlan_header_t *h0; |
| u16 tag; |
| |
| *match_flags = SUBINT_CONFIG_VALID | SUBINT_CONFIG_MATCH_1_TAG; |
| |
| h0 = (void *) (b0->data + b0->current_data); |
| |
| tag = clib_net_to_host_u16 (h0->priority_cfi_and_id); |
| |
| *outer_id = tag & 0xfff; |
| if (0 == *outer_id) |
| *match_flags &= ~SUBINT_CONFIG_MATCH_1_TAG; |
| |
| *type = clib_net_to_host_u16 (h0->type); |
| |
| vlib_buffer_advance (b0, sizeof (h0[0])); |
| vlan_count = 1; |
| |
| if (*type == ETHERNET_TYPE_VLAN) |
| { |
| // Double tagged packet |
| *match_flags = SUBINT_CONFIG_VALID | SUBINT_CONFIG_MATCH_2_TAG; |
| |
| h0 = (void *) (b0->data + b0->current_data); |
| |
| tag = clib_net_to_host_u16 (h0->priority_cfi_and_id); |
| |
| *inner_id = tag & 0xfff; |
| |
| *type = clib_net_to_host_u16 (h0->type); |
| |
| vlib_buffer_advance (b0, sizeof (h0[0])); |
| vlan_count = 2; |
| if (*type == ETHERNET_TYPE_VLAN) |
| { |
| // More than double tagged packet |
| *match_flags = SUBINT_CONFIG_VALID | SUBINT_CONFIG_MATCH_3_TAG; |
| |
| vlib_buffer_advance (b0, sizeof (h0[0])); |
| vlan_count = 3; // "unknown" number, aka, 3-or-more |
| } |
| } |
| } |
| ethernet_buffer_set_vlan_count (b0, vlan_count); |
| } |
| |
| // Determine the subinterface for this packet, given the result of the |
| // vlan table lookups and vlan header parsing. Check the most specific |
| // matches first. |
| static_always_inline void |
| identify_subint (vnet_hw_interface_t * hi, |
| vlib_buffer_t * b0, |
| u32 match_flags, |
| main_intf_t * main_intf, |
| vlan_intf_t * vlan_intf, |
| qinq_intf_t * qinq_intf, |
| u32 * new_sw_if_index, u8 * error0, u32 * is_l2) |
| { |
| u32 matched; |
| |
| matched = eth_identify_subint (hi, b0, match_flags, |
| main_intf, vlan_intf, qinq_intf, |
| new_sw_if_index, error0, is_l2); |
| |
| if (matched) |
| { |
| |
| // Perform L3 my-mac filter |
| // A unicast packet arriving on an L3 interface must have a dmac matching the interface mac. |
| // This is required for promiscuous mode, else we will forward packets we aren't supposed to. |
| if (!(*is_l2)) |
| { |
| ethernet_header_t *e0; |
| e0 = |
| (void *) (b0->data + |
| vnet_buffer (b0)->ethernet.start_of_ethernet_header); |
| |
| if (!(ethernet_address_cast (e0->dst_address))) |
| { |
| if (!eth_mac_equal ((u8 *) e0, hi->hw_address)) |
| { |
| *error0 = ETHERNET_ERROR_L3_MAC_MISMATCH; |
| } |
| } |
| } |
| |
| // Check for down subinterface |
| *error0 = (*new_sw_if_index) != ~0 ? (*error0) : ETHERNET_ERROR_DOWN; |
| } |
| } |
| |
| static_always_inline void |
| determine_next_node (ethernet_main_t * em, |
| ethernet_input_variant_t variant, |
| u32 is_l20, |
| u32 type0, vlib_buffer_t * b0, u8 * error0, u8 * next0) |
| { |
| if (PREDICT_FALSE (*error0 != ETHERNET_ERROR_NONE)) |
| { |
| // some error occurred |
| *next0 = ETHERNET_INPUT_NEXT_DROP; |
| } |
| else if (is_l20) |
| { |
| *next0 = em->l2_next; |
| // record the L2 len and reset the buffer so the L2 header is preserved |
| u32 eth_start = vnet_buffer (b0)->ethernet.start_of_ethernet_header; |
| vnet_buffer (b0)->l2.l2_len = b0->current_data - eth_start; |
| ASSERT (vnet_buffer (b0)->l2.l2_len == |
| ethernet_buffer_header_size (b0)); |
| vlib_buffer_advance (b0, -ethernet_buffer_header_size (b0)); |
| |
| // check for common IP/MPLS ethertypes |
| } |
| else if (type0 == ETHERNET_TYPE_IP4) |
| { |
| *next0 = em->l3_next.input_next_ip4; |
| } |
| else if (type0 == ETHERNET_TYPE_IP6) |
| { |
| *next0 = em->l3_next.input_next_ip6; |
| } |
| else if (type0 == ETHERNET_TYPE_MPLS) |
| { |
| *next0 = em->l3_next.input_next_mpls; |
| |
| } |
| else if (em->redirect_l3) |
| { |
| // L3 Redirect is on, the cached common next nodes will be |
| // pointing to the redirect node, catch the uncommon types here |
| *next0 = em->redirect_l3_next; |
| } |
| else |
| { |
| // uncommon ethertype, check table |
| u32 i0; |
| i0 = sparse_vec_index (em->l3_next.input_next_by_type, type0); |
| *next0 = vec_elt (em->l3_next.input_next_by_type, i0); |
| *error0 = |
| i0 == |
| SPARSE_VEC_INVALID_INDEX ? ETHERNET_ERROR_UNKNOWN_TYPE : *error0; |
| |
| // The table is not populated with LLC values, so check that now. |
| // If variant is variant_ethernet then we came from LLC processing. Don't |
| // go back there; drop instead using by keeping the drop/bad table result. |
| if ((type0 < 0x600) && (variant == ETHERNET_INPUT_VARIANT_ETHERNET)) |
| { |
| *next0 = ETHERNET_INPUT_NEXT_LLC; |
| } |
| } |
| } |
| |
| static_always_inline uword |
| ethernet_input_inline (vlib_main_t * vm, |
| vlib_node_runtime_t * node, |
| vlib_frame_t * from_frame, |
| ethernet_input_variant_t variant) |
| { |
| vnet_main_t *vnm = vnet_get_main (); |
| ethernet_main_t *em = ðernet_main; |
| vlib_node_runtime_t *error_node; |
| u32 n_left_from, next_index, *from, *to_next; |
| u32 stats_sw_if_index, stats_n_packets, stats_n_bytes; |
| u32 thread_index = vlib_get_thread_index (); |
| u32 cached_sw_if_index = ~0; |
| u32 cached_is_l2 = 0; /* shut up gcc */ |
| vnet_hw_interface_t *hi = NULL; /* used for main interface only */ |
| |
| if (variant != ETHERNET_INPUT_VARIANT_ETHERNET) |
| error_node = vlib_node_get_runtime (vm, ethernet_input_node.index); |
| else |
| error_node = node; |
| |
| from = vlib_frame_vector_args (from_frame); |
| n_left_from = from_frame->n_vectors; |
| |
| if (node->flags & VLIB_NODE_FLAG_TRACE) |
| vlib_trace_frame_buffers_only (vm, node, |
| from, |
| n_left_from, |
| sizeof (from[0]), |
| sizeof (ethernet_input_trace_t)); |
| |
| next_index = node->cached_next_index; |
| stats_sw_if_index = node->runtime_data[0]; |
| stats_n_packets = stats_n_bytes = 0; |
| |
| while (n_left_from > 0) |
| { |
| u32 n_left_to_next; |
| |
| vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); |
| |
| while (n_left_from >= 4 && n_left_to_next >= 2) |
| { |
| u32 bi0, bi1; |
| vlib_buffer_t *b0, *b1; |
| u8 next0, next1, error0, error1; |
| u16 type0, orig_type0, type1, orig_type1; |
| u16 outer_id0, inner_id0, outer_id1, inner_id1; |
| u32 match_flags0, match_flags1; |
| u32 old_sw_if_index0, new_sw_if_index0, len0, old_sw_if_index1, |
| new_sw_if_index1, len1; |
| vnet_hw_interface_t *hi0, *hi1; |
| main_intf_t *main_intf0, *main_intf1; |
| vlan_intf_t *vlan_intf0, *vlan_intf1; |
| qinq_intf_t *qinq_intf0, *qinq_intf1; |
| u32 is_l20, is_l21; |
| ethernet_header_t *e0, *e1; |
| |
| /* Prefetch next iteration. */ |
| { |
| vlib_buffer_t *b2, *b3; |
| |
| b2 = vlib_get_buffer (vm, from[2]); |
| b3 = vlib_get_buffer (vm, from[3]); |
| |
| vlib_prefetch_buffer_header (b2, STORE); |
| vlib_prefetch_buffer_header (b3, STORE); |
| |
| CLIB_PREFETCH (b2->data, sizeof (ethernet_header_t), LOAD); |
| CLIB_PREFETCH (b3->data, sizeof (ethernet_header_t), LOAD); |
| } |
| |
| bi0 = from[0]; |
| bi1 = from[1]; |
| to_next[0] = bi0; |
| to_next[1] = bi1; |
| from += 2; |
| to_next += 2; |
| n_left_to_next -= 2; |
| n_left_from -= 2; |
| |
| b0 = vlib_get_buffer (vm, bi0); |
| b1 = vlib_get_buffer (vm, bi1); |
| |
| error0 = error1 = ETHERNET_ERROR_NONE; |
| e0 = vlib_buffer_get_current (b0); |
| type0 = clib_net_to_host_u16 (e0->type); |
| e1 = vlib_buffer_get_current (b1); |
| type1 = clib_net_to_host_u16 (e1->type); |
| |
| /* Speed-path for the untagged case */ |
| if (PREDICT_TRUE (variant == ETHERNET_INPUT_VARIANT_ETHERNET |
| && !ethernet_frame_is_tagged (type0) |
| && !ethernet_frame_is_tagged (type1))) |
| { |
| main_intf_t *intf0; |
| subint_config_t *subint0; |
| u32 sw_if_index0, sw_if_index1; |
| |
| sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX]; |
| sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_RX]; |
| is_l20 = cached_is_l2; |
| |
| /* This is probably wholly unnecessary */ |
| if (PREDICT_FALSE (sw_if_index0 != sw_if_index1)) |
| goto slowpath; |
| |
| /* Now sw_if_index0 == sw_if_index1 */ |
| if (PREDICT_FALSE (cached_sw_if_index != sw_if_index0)) |
| { |
| cached_sw_if_index = sw_if_index0; |
| hi = vnet_get_sup_hw_interface (vnm, sw_if_index0); |
| intf0 = vec_elt_at_index (em->main_intfs, hi->hw_if_index); |
| subint0 = &intf0->untagged_subint; |
| cached_is_l2 = is_l20 = subint0->flags & SUBINT_CONFIG_L2; |
| } |
| |
| vnet_buffer (b0)->ethernet.start_of_ethernet_header = |
| b0->current_data; |
| vnet_buffer (b1)->ethernet.start_of_ethernet_header = |
| b1->current_data; |
| |
| if (PREDICT_TRUE (is_l20 != 0)) |
| { |
| next0 = em->l2_next; |
| vnet_buffer (b0)->l2.l2_len = sizeof (ethernet_header_t); |
| next1 = em->l2_next; |
| vnet_buffer (b1)->l2.l2_len = sizeof (ethernet_header_t); |
| } |
| else |
| { |
| if (!ethernet_address_cast (e0->dst_address) && |
| (hi->hw_address != 0) && |
| !eth_mac_equal ((u8 *) e0, hi->hw_address)) |
| error0 = ETHERNET_ERROR_L3_MAC_MISMATCH; |
| if (!ethernet_address_cast (e1->dst_address) && |
| (hi->hw_address != 0) && |
| !eth_mac_equal ((u8 *) e1, hi->hw_address)) |
| error1 = ETHERNET_ERROR_L3_MAC_MISMATCH; |
| determine_next_node (em, variant, 0, type0, b0, |
| &error0, &next0); |
| vlib_buffer_advance (b0, sizeof (ethernet_header_t)); |
| determine_next_node (em, variant, 0, type1, b1, |
| &error1, &next1); |
| vlib_buffer_advance (b1, sizeof (ethernet_header_t)); |
| } |
| goto ship_it01; |
| } |
| |
| /* Slow-path for the tagged case */ |
| slowpath: |
| parse_header (variant, |
| b0, |
| &type0, |
| &orig_type0, &outer_id0, &inner_id0, &match_flags0); |
| |
| parse_header (variant, |
| b1, |
| &type1, |
| &orig_type1, &outer_id1, &inner_id1, &match_flags1); |
| |
| old_sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX]; |
| old_sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_RX]; |
| |
| eth_vlan_table_lookups (em, |
| vnm, |
| old_sw_if_index0, |
| orig_type0, |
| outer_id0, |
| inner_id0, |
| &hi0, |
| &main_intf0, &vlan_intf0, &qinq_intf0); |
| |
| eth_vlan_table_lookups (em, |
| vnm, |
| old_sw_if_index1, |
| orig_type1, |
| outer_id1, |
| inner_id1, |
| &hi1, |
| &main_intf1, &vlan_intf1, &qinq_intf1); |
| |
| identify_subint (hi0, |
| b0, |
| match_flags0, |
| main_intf0, |
| vlan_intf0, |
| qinq_intf0, &new_sw_if_index0, &error0, &is_l20); |
| |
| identify_subint (hi1, |
| b1, |
| match_flags1, |
| main_intf1, |
| vlan_intf1, |
| qinq_intf1, &new_sw_if_index1, &error1, &is_l21); |
| |
| // Save RX sw_if_index for later nodes |
| vnet_buffer (b0)->sw_if_index[VLIB_RX] = |
| error0 != |
| ETHERNET_ERROR_NONE ? old_sw_if_index0 : new_sw_if_index0; |
| vnet_buffer (b1)->sw_if_index[VLIB_RX] = |
| error1 != |
| ETHERNET_ERROR_NONE ? old_sw_if_index1 : new_sw_if_index1; |
| |
| // Check if there is a stat to take (valid and non-main sw_if_index for pkt 0 or pkt 1) |
| if (((new_sw_if_index0 != ~0) |
| && (new_sw_if_index0 != old_sw_if_index0)) |
| || ((new_sw_if_index1 != ~0) |
| && (new_sw_if_index1 != old_sw_if_index1))) |
| { |
| |
| len0 = vlib_buffer_length_in_chain (vm, b0) + b0->current_data |
| - vnet_buffer (b0)->ethernet.start_of_ethernet_header; |
| len1 = vlib_buffer_length_in_chain (vm, b1) + b1->current_data |
| - vnet_buffer (b1)->ethernet.start_of_ethernet_header; |
| |
| stats_n_packets += 2; |
| stats_n_bytes += len0 + len1; |
| |
| if (PREDICT_FALSE |
| (!(new_sw_if_index0 == stats_sw_if_index |
| && new_sw_if_index1 == stats_sw_if_index))) |
| { |
| stats_n_packets -= 2; |
| stats_n_bytes -= len0 + len1; |
| |
| if (new_sw_if_index0 != old_sw_if_index0 |
| && new_sw_if_index0 != ~0) |
| vlib_increment_combined_counter (vnm-> |
| interface_main.combined_sw_if_counters |
| + |
| VNET_INTERFACE_COUNTER_RX, |
| thread_index, |
| new_sw_if_index0, 1, |
| len0); |
| if (new_sw_if_index1 != old_sw_if_index1 |
| && new_sw_if_index1 != ~0) |
| vlib_increment_combined_counter (vnm-> |
| interface_main.combined_sw_if_counters |
| + |
| VNET_INTERFACE_COUNTER_RX, |
| thread_index, |
| new_sw_if_index1, 1, |
| len1); |
| |
| if (new_sw_if_index0 == new_sw_if_index1) |
| { |
| if (stats_n_packets > 0) |
| { |
| vlib_increment_combined_counter |
| (vnm->interface_main.combined_sw_if_counters |
| + VNET_INTERFACE_COUNTER_RX, |
| thread_index, |
| stats_sw_if_index, |
| stats_n_packets, stats_n_bytes); |
| stats_n_packets = stats_n_bytes = 0; |
| } |
| stats_sw_if_index = new_sw_if_index0; |
| } |
| } |
| } |
| |
| if (variant == ETHERNET_INPUT_VARIANT_NOT_L2) |
| is_l20 = is_l21 = 0; |
| |
| determine_next_node (em, variant, is_l20, type0, b0, &error0, |
| &next0); |
| determine_next_node (em, variant, is_l21, type1, b1, &error1, |
| &next1); |
| |
| ship_it01: |
| b0->error = error_node->errors[error0]; |
| b1->error = error_node->errors[error1]; |
| |
| // verify speculative enqueue |
| vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next, |
| n_left_to_next, bi0, bi1, next0, |
| next1); |
| } |
| |
| while (n_left_from > 0 && n_left_to_next > 0) |
| { |
| u32 bi0; |
| vlib_buffer_t *b0; |
| u8 error0, next0; |
| u16 type0, orig_type0; |
| u16 outer_id0, inner_id0; |
| u32 match_flags0; |
| u32 old_sw_if_index0, new_sw_if_index0, len0; |
| vnet_hw_interface_t *hi0; |
| main_intf_t *main_intf0; |
| vlan_intf_t *vlan_intf0; |
| qinq_intf_t *qinq_intf0; |
| ethernet_header_t *e0; |
| u32 is_l20; |
| |
| // Prefetch next iteration |
| if (n_left_from > 1) |
| { |
| vlib_buffer_t *p2; |
| |
| p2 = vlib_get_buffer (vm, from[1]); |
| vlib_prefetch_buffer_header (p2, STORE); |
| CLIB_PREFETCH (p2->data, CLIB_CACHE_LINE_BYTES, LOAD); |
| } |
| |
| bi0 = from[0]; |
| to_next[0] = bi0; |
| from += 1; |
| to_next += 1; |
| n_left_from -= 1; |
| n_left_to_next -= 1; |
| |
| b0 = vlib_get_buffer (vm, bi0); |
| |
| error0 = ETHERNET_ERROR_NONE; |
| e0 = vlib_buffer_get_current (b0); |
| type0 = clib_net_to_host_u16 (e0->type); |
| |
| /* Speed-path for the untagged case */ |
| if (PREDICT_TRUE (variant == ETHERNET_INPUT_VARIANT_ETHERNET |
| && !ethernet_frame_is_tagged (type0))) |
| { |
| main_intf_t *intf0; |
| subint_config_t *subint0; |
| u32 sw_if_index0; |
| |
| sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX]; |
| is_l20 = cached_is_l2; |
| |
| if (PREDICT_FALSE (cached_sw_if_index != sw_if_index0)) |
| { |
| cached_sw_if_index = sw_if_index0; |
| hi = vnet_get_sup_hw_interface (vnm, sw_if_index0); |
| intf0 = vec_elt_at_index (em->main_intfs, hi->hw_if_index); |
| subint0 = &intf0->untagged_subint; |
| cached_is_l2 = is_l20 = subint0->flags & SUBINT_CONFIG_L2; |
| } |
| |
| vnet_buffer (b0)->ethernet.start_of_ethernet_header = |
| b0->current_data; |
| |
| if (PREDICT_TRUE (is_l20 != 0)) |
| { |
| next0 = em->l2_next; |
| vnet_buffer (b0)->l2.l2_len = sizeof (ethernet_header_t); |
| } |
| else |
| { |
| if (!ethernet_address_cast (e0->dst_address) && |
| (hi->hw_address != 0) && |
| !eth_mac_equal ((u8 *) e0, hi->hw_address)) |
| error0 = ETHERNET_ERROR_L3_MAC_MISMATCH; |
| determine_next_node (em, variant, 0, type0, b0, |
| &error0, &next0); |
| vlib_buffer_advance (b0, sizeof (ethernet_header_t)); |
| } |
| goto ship_it0; |
| } |
| |
| /* Slow-path for the tagged case */ |
| parse_header (variant, |
| b0, |
| &type0, |
| &orig_type0, &outer_id0, &inner_id0, &match_flags0); |
| |
| old_sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX]; |
| |
| eth_vlan_table_lookups (em, |
| vnm, |
| old_sw_if_index0, |
| orig_type0, |
| outer_id0, |
| inner_id0, |
| &hi0, |
| &main_intf0, &vlan_intf0, &qinq_intf0); |
| |
| identify_subint (hi0, |
| b0, |
| match_flags0, |
| main_intf0, |
| vlan_intf0, |
| qinq_intf0, &new_sw_if_index0, &error0, &is_l20); |
| |
| // Save RX sw_if_index for later nodes |
| vnet_buffer (b0)->sw_if_index[VLIB_RX] = |
| error0 != |
| ETHERNET_ERROR_NONE ? old_sw_if_index0 : new_sw_if_index0; |
| |
| // Increment subinterface stats |
| // Note that interface-level counters have already been incremented |
| // prior to calling this function. Thus only subinterface counters |
| // are incremented here. |
| // |
| // Interface level counters include packets received on the main |
| // interface and all subinterfaces. Subinterface level counters |
| // include only those packets received on that subinterface |
| // Increment stats if the subint is valid and it is not the main intf |
| if ((new_sw_if_index0 != ~0) |
| && (new_sw_if_index0 != old_sw_if_index0)) |
| { |
| |
| len0 = vlib_buffer_length_in_chain (vm, b0) + b0->current_data |
| - vnet_buffer (b0)->ethernet.start_of_ethernet_header; |
| |
| stats_n_packets += 1; |
| stats_n_bytes += len0; |
| |
| // Batch stat increments from the same subinterface so counters |
| // don't need to be incremented for every packet. |
| if (PREDICT_FALSE (new_sw_if_index0 != stats_sw_if_index)) |
| { |
| stats_n_packets -= 1; |
| stats_n_bytes -= len0; |
| |
| if (new_sw_if_index0 != ~0) |
| vlib_increment_combined_counter |
| (vnm->interface_main.combined_sw_if_counters |
| + VNET_INTERFACE_COUNTER_RX, |
| thread_index, new_sw_if_index0, 1, len0); |
| if (stats_n_packets > 0) |
| { |
| vlib_increment_combined_counter |
| (vnm->interface_main.combined_sw_if_counters |
| + VNET_INTERFACE_COUNTER_RX, |
| thread_index, |
| stats_sw_if_index, stats_n_packets, stats_n_bytes); |
| stats_n_packets = stats_n_bytes = 0; |
| } |
| stats_sw_if_index = new_sw_if_index0; |
| } |
| } |
| |
| if (variant == ETHERNET_INPUT_VARIANT_NOT_L2) |
| is_l20 = 0; |
| |
| determine_next_node (em, variant, is_l20, type0, b0, &error0, |
| &next0); |
| |
| ship_it0: |
| b0->error = error_node->errors[error0]; |
| |
| // verify speculative enqueue |
| vlib_validate_buffer_enqueue_x1 (vm, node, next_index, |
| to_next, n_left_to_next, |
| bi0, next0); |
| } |
| |
| vlib_put_next_frame (vm, node, next_index, n_left_to_next); |
| } |
| |
| // Increment any remaining batched stats |
| if (stats_n_packets > 0) |
| { |
| vlib_increment_combined_counter |
| (vnm->interface_main.combined_sw_if_counters |
| + VNET_INTERFACE_COUNTER_RX, |
| thread_index, stats_sw_if_index, stats_n_packets, stats_n_bytes); |
| node->runtime_data[0] = stats_sw_if_index; |
| } |
| |
| return from_frame->n_vectors; |
| } |
| |
| static uword |
| ethernet_input (vlib_main_t * vm, |
| vlib_node_runtime_t * node, vlib_frame_t * from_frame) |
| { |
| return ethernet_input_inline (vm, node, from_frame, |
| ETHERNET_INPUT_VARIANT_ETHERNET); |
| } |
| |
| static uword |
| ethernet_input_type (vlib_main_t * vm, |
| vlib_node_runtime_t * node, vlib_frame_t * from_frame) |
| { |
| return ethernet_input_inline (vm, node, from_frame, |
| ETHERNET_INPUT_VARIANT_ETHERNET_TYPE); |
| } |
| |
| static uword |
| ethernet_input_not_l2 (vlib_main_t * vm, |
| vlib_node_runtime_t * node, vlib_frame_t * from_frame) |
| { |
| return ethernet_input_inline (vm, node, from_frame, |
| ETHERNET_INPUT_VARIANT_NOT_L2); |
| } |
| |
| |
| // Return the subinterface config struct for the given sw_if_index |
| // Also return via parameter the appropriate match flags for the |
| // configured number of tags. |
| // On error (unsupported or not ethernet) return 0. |
| static subint_config_t * |
| ethernet_sw_interface_get_config (vnet_main_t * vnm, |
| u32 sw_if_index, |
| u32 * flags, u32 * unsupported) |
| { |
| ethernet_main_t *em = ðernet_main; |
| vnet_hw_interface_t *hi; |
| vnet_sw_interface_t *si; |
| main_intf_t *main_intf; |
| vlan_table_t *vlan_table; |
| qinq_table_t *qinq_table; |
| subint_config_t *subint = 0; |
| |
| hi = vnet_get_sup_hw_interface (vnm, sw_if_index); |
| |
| if (!hi || (hi->hw_class_index != ethernet_hw_interface_class.index)) |
| { |
| *unsupported = 0; |
| goto done; // non-ethernet interface |
| } |
| |
| // ensure there's an entry for the main intf (shouldn't really be necessary) |
| vec_validate (em->main_intfs, hi->hw_if_index); |
| main_intf = vec_elt_at_index (em->main_intfs, hi->hw_if_index); |
| |
| // Locate the subint for the given ethernet config |
| si = vnet_get_sw_interface (vnm, sw_if_index); |
| |
| if (si->sub.eth.flags.default_sub) |
| { |
| subint = &main_intf->default_subint; |
| *flags = SUBINT_CONFIG_MATCH_0_TAG | |
| SUBINT_CONFIG_MATCH_1_TAG | |
| SUBINT_CONFIG_MATCH_2_TAG | SUBINT_CONFIG_MATCH_3_TAG; |
| } |
| else if ((si->sub.eth.flags.no_tags) || (si->sub.eth.raw_flags == 0)) |
| { |
| // if no flags are set then this is a main interface |
| // so treat as untagged |
| subint = &main_intf->untagged_subint; |
| *flags = SUBINT_CONFIG_MATCH_0_TAG; |
| } |
| else |
| { |
| // one or two tags |
| // first get the vlan table |
| if (si->sub.eth.flags.dot1ad) |
| { |
| if (main_intf->dot1ad_vlans == 0) |
| { |
| // Allocate a vlan table from the pool |
| pool_get (em->vlan_pool, vlan_table); |
| main_intf->dot1ad_vlans = vlan_table - em->vlan_pool; |
| } |
| else |
| { |
| // Get ptr to existing vlan table |
| vlan_table = |
| vec_elt_at_index (em->vlan_pool, main_intf->dot1ad_vlans); |
| } |
| } |
| else |
| { // dot1q |
| if (main_intf->dot1q_vlans == 0) |
| { |
| // Allocate a vlan table from the pool |
| pool_get (em->vlan_pool, vlan_table); |
| main_intf->dot1q_vlans = vlan_table - em->vlan_pool; |
| } |
| else |
| { |
| // Get ptr to existing vlan table |
| vlan_table = |
| vec_elt_at_index (em->vlan_pool, main_intf->dot1q_vlans); |
| } |
| } |
| |
| if (si->sub.eth.flags.one_tag) |
| { |
| *flags = si->sub.eth.flags.exact_match ? |
| SUBINT_CONFIG_MATCH_1_TAG : |
| (SUBINT_CONFIG_MATCH_1_TAG | |
| SUBINT_CONFIG_MATCH_2_TAG | SUBINT_CONFIG_MATCH_3_TAG); |
| |
| if (si->sub.eth.flags.outer_vlan_id_any) |
| { |
| // not implemented yet |
| *unsupported = 1; |
| goto done; |
| } |
| else |
| { |
| // a single vlan, a common case |
| subint = |
| &vlan_table->vlans[si->sub.eth. |
| outer_vlan_id].single_tag_subint; |
| } |
| |
| } |
| else |
| { |
| // Two tags |
| *flags = si->sub.eth.flags.exact_match ? |
| SUBINT_CONFIG_MATCH_2_TAG : |
| (SUBINT_CONFIG_MATCH_2_TAG | SUBINT_CONFIG_MATCH_3_TAG); |
| |
| if (si->sub.eth.flags.outer_vlan_id_any |
| && si->sub.eth.flags.inner_vlan_id_any) |
| { |
| // not implemented yet |
| *unsupported = 1; |
| goto done; |
| } |
| |
| if (si->sub.eth.flags.inner_vlan_id_any) |
| { |
| // a specific outer and "any" inner |
| // don't need a qinq table for this |
| subint = |
| &vlan_table->vlans[si->sub.eth. |
| outer_vlan_id].inner_any_subint; |
| if (si->sub.eth.flags.exact_match) |
| { |
| *flags = SUBINT_CONFIG_MATCH_2_TAG; |
| } |
| else |
| { |
| *flags = SUBINT_CONFIG_MATCH_2_TAG | |
| SUBINT_CONFIG_MATCH_3_TAG; |
| } |
| } |
| else |
| { |
| // a specific outer + specifc innner vlan id, a common case |
| |
| // get the qinq table |
| if (vlan_table->vlans[si->sub.eth.outer_vlan_id].qinqs == 0) |
| { |
| // Allocate a qinq table from the pool |
| pool_get (em->qinq_pool, qinq_table); |
| vlan_table->vlans[si->sub.eth.outer_vlan_id].qinqs = |
| qinq_table - em->qinq_pool; |
| } |
| else |
| { |
| // Get ptr to existing qinq table |
| qinq_table = |
| vec_elt_at_index (em->qinq_pool, |
| vlan_table->vlans[si->sub. |
| eth.outer_vlan_id]. |
| qinqs); |
| } |
| subint = &qinq_table->vlans[si->sub.eth.inner_vlan_id].subint; |
| } |
| } |
| } |
| |
| done: |
| return subint; |
| } |
| |
| clib_error_t * |
| ethernet_sw_interface_up_down (vnet_main_t * vnm, u32 sw_if_index, u32 flags) |
| { |
| subint_config_t *subint; |
| u32 dummy_flags; |
| u32 dummy_unsup; |
| clib_error_t *error = 0; |
| |
| // Find the config for this subinterface |
| subint = |
| ethernet_sw_interface_get_config (vnm, sw_if_index, &dummy_flags, |
| &dummy_unsup); |
| |
| if (subint == 0) |
| { |
| // not implemented yet or not ethernet |
| goto done; |
| } |
| |
| subint->sw_if_index = |
| ((flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) ? sw_if_index : ~0); |
| |
| done: |
| return error; |
| } |
| |
| VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION (ethernet_sw_interface_up_down); |
| |
| |
| // Set the L2/L3 mode for the subinterface |
| void |
| ethernet_sw_interface_set_l2_mode (vnet_main_t * vnm, u32 sw_if_index, u32 l2) |
| { |
| subint_config_t *subint; |
| u32 dummy_flags; |
| u32 dummy_unsup; |
| int is_port; |
| vnet_sw_interface_t *sw = vnet_get_sw_interface (vnm, sw_if_index); |
| |
| is_port = !(sw->type == VNET_SW_INTERFACE_TYPE_SUB); |
| |
| // Find the config for this subinterface |
| subint = |
| ethernet_sw_interface_get_config (vnm, sw_if_index, &dummy_flags, |
| &dummy_unsup); |
| |
| if (subint == 0) |
| { |
| // unimplemented or not ethernet |
| goto done; |
| } |
| |
| // Double check that the config we found is for our interface (or the interface is down) |
| ASSERT ((subint->sw_if_index == sw_if_index) | (subint->sw_if_index == ~0)); |
| |
| if (l2) |
| { |
| subint->flags |= SUBINT_CONFIG_L2; |
| if (is_port) |
| subint->flags |= |
| SUBINT_CONFIG_MATCH_0_TAG | SUBINT_CONFIG_MATCH_1_TAG |
| | SUBINT_CONFIG_MATCH_2_TAG | SUBINT_CONFIG_MATCH_3_TAG; |
| } |
| else |
| { |
| subint->flags &= ~SUBINT_CONFIG_L2; |
| if (is_port) |
| subint->flags &= |
| ~(SUBINT_CONFIG_MATCH_1_TAG | SUBINT_CONFIG_MATCH_2_TAG |
| | SUBINT_CONFIG_MATCH_3_TAG); |
| } |
| |
| done: |
| return; |
| } |
| |
| /* |
| * Set the L2/L3 mode for the subinterface regardless of port |
| */ |
| void |
| ethernet_sw_interface_set_l2_mode_noport (vnet_main_t * vnm, |
| u32 sw_if_index, u32 l2) |
| { |
| subint_config_t *subint; |
| u32 dummy_flags; |
| u32 dummy_unsup; |
| |
| /* Find the config for this subinterface */ |
| subint = |
| ethernet_sw_interface_get_config (vnm, sw_if_index, &dummy_flags, |
| &dummy_unsup); |
| |
| if (subint == 0) |
| { |
| /* unimplemented or not ethernet */ |
| goto done; |
| } |
| |
| /* |
| * Double check that the config we found is for our interface (or the |
| * interface is down) |
| */ |
| ASSERT ((subint->sw_if_index == sw_if_index) | (subint->sw_if_index == ~0)); |
| |
| if (l2) |
| { |
| subint->flags |= SUBINT_CONFIG_L2; |
| } |
| else |
| { |
| subint->flags &= ~SUBINT_CONFIG_L2; |
| } |
| |
| done: |
| return; |
| } |
| |
| static clib_error_t * |
| ethernet_sw_interface_add_del (vnet_main_t * vnm, |
| u32 sw_if_index, u32 is_create) |
| { |
| clib_error_t *error = 0; |
| subint_config_t *subint; |
| u32 match_flags; |
| u32 unsupported = 0; |
| |
| // Find the config for this subinterface |
| subint = |
| ethernet_sw_interface_get_config (vnm, sw_if_index, &match_flags, |
| &unsupported); |
| |
| if (subint == 0) |
| { |
| // not implemented yet or not ethernet |
| if (unsupported) |
| { |
| // this is the NYI case |
| error = clib_error_return (0, "not implemented yet"); |
| } |
| goto done; |
| } |
| |
| if (!is_create) |
| { |
| subint->flags = 0; |
| return error; |
| } |
| |
| // Initialize the subint |
| if (subint->flags & SUBINT_CONFIG_VALID) |
| { |
| // Error vlan already in use |
| error = clib_error_return (0, "vlan is already in use"); |
| } |
| else |
| { |
| // Note that config is L3 by defaulty |
| subint->flags = SUBINT_CONFIG_VALID | match_flags; |
| subint->sw_if_index = ~0; // because interfaces are initially down |
| } |
| |
| done: |
| return error; |
| } |
| |
| VNET_SW_INTERFACE_ADD_DEL_FUNCTION (ethernet_sw_interface_add_del); |
| |
| static char *ethernet_error_strings[] = { |
| #define ethernet_error(n,c,s) s, |
| #include "error.def" |
| #undef ethernet_error |
| }; |
| |
| /* *INDENT-OFF* */ |
| VLIB_REGISTER_NODE (ethernet_input_node) = { |
| .function = ethernet_input, |
| .name = "ethernet-input", |
| /* Takes a vector of packets. */ |
| .vector_size = sizeof (u32), |
| .n_errors = ETHERNET_N_ERROR, |
| .error_strings = ethernet_error_strings, |
| .n_next_nodes = ETHERNET_INPUT_N_NEXT, |
| .next_nodes = { |
| #define _(s,n) [ETHERNET_INPUT_NEXT_##s] = n, |
| foreach_ethernet_input_next |
| #undef _ |
| }, |
| .format_buffer = format_ethernet_header_with_length, |
| .format_trace = format_ethernet_input_trace, |
| .unformat_buffer = unformat_ethernet_header, |
| }; |
| /* *INDENT-ON* */ |
| |
| /* *INDENT-OFF* */ |
| VLIB_NODE_FUNCTION_MULTIARCH (ethernet_input_node, ethernet_input) |
| /* *INDENT-ON* */ |
| |
| /* *INDENT-OFF* */ |
| VLIB_REGISTER_NODE (ethernet_input_type_node, static) = { |
| .function = ethernet_input_type, |
| .name = "ethernet-input-type", |
| /* Takes a vector of packets. */ |
| .vector_size = sizeof (u32), |
| .n_next_nodes = ETHERNET_INPUT_N_NEXT, |
| .next_nodes = { |
| #define _(s,n) [ETHERNET_INPUT_NEXT_##s] = n, |
| foreach_ethernet_input_next |
| #undef _ |
| }, |
| }; |
| /* *INDENT-ON* */ |
| |
| /* *INDENT-OFF* */ |
| VLIB_NODE_FUNCTION_MULTIARCH (ethernet_input_type_node, ethernet_input_type) |
| /* *INDENT-ON* */ |
| |
| /* *INDENT-OFF* */ |
| VLIB_REGISTER_NODE (ethernet_input_not_l2_node, static) = { |
| .function = ethernet_input_not_l2, |
| .name = "ethernet-input-not-l2", |
| /* Takes a vector of packets. */ |
| .vector_size = sizeof (u32), |
| .n_next_nodes = ETHERNET_INPUT_N_NEXT, |
| .next_nodes = { |
| #define _(s,n) [ETHERNET_INPUT_NEXT_##s] = n, |
| foreach_ethernet_input_next |
| #undef _ |
| }, |
| }; |
| /* *INDENT-ON* */ |
| |
| |
| /* *INDENT-OFF* */ |
| VLIB_NODE_FUNCTION_MULTIARCH (ethernet_input_not_l2_node, |
| ethernet_input_not_l2) |
| /* *INDENT-ON* */ |
| |
| |
| void |
| ethernet_set_rx_redirect (vnet_main_t * vnm, |
| vnet_hw_interface_t * hi, u32 enable) |
| { |
| // Insure all packets go to ethernet-input (i.e. untagged ipv4 packets |
| // don't go directly to ip4-input) |
| vnet_hw_interface_rx_redirect_to_node |
| (vnm, hi->hw_if_index, enable ? ethernet_input_node.index : ~0); |
| } |
| |
| |
| /* |
| * Initialization and registration for the next_by_ethernet structure |
| */ |
| |
| clib_error_t * |
| next_by_ethertype_init (next_by_ethertype_t * l3_next) |
| { |
| l3_next->input_next_by_type = sparse_vec_new |
| ( /* elt bytes */ sizeof (l3_next->input_next_by_type[0]), |
| /* bits in index */ BITS (((ethernet_header_t *) 0)->type)); |
| |
| vec_validate (l3_next->sparse_index_by_input_next_index, |
| ETHERNET_INPUT_NEXT_DROP); |
| vec_validate (l3_next->sparse_index_by_input_next_index, |
| ETHERNET_INPUT_NEXT_PUNT); |
| l3_next->sparse_index_by_input_next_index[ETHERNET_INPUT_NEXT_DROP] = |
| SPARSE_VEC_INVALID_INDEX; |
| l3_next->sparse_index_by_input_next_index[ETHERNET_INPUT_NEXT_PUNT] = |
| SPARSE_VEC_INVALID_INDEX; |
| |
| /* |
| * Make sure we don't wipe out an ethernet registration by mistake |
| * Can happen if init function ordering constraints are missing. |
| */ |
| if (CLIB_DEBUG > 0) |
| { |
| ethernet_main_t *em = ðernet_main; |
| ASSERT (em->next_by_ethertype_register_called == 0); |
| } |
| |
| return 0; |
| } |
| |
| // Add an ethertype -> next index mapping to the structure |
| clib_error_t * |
| next_by_ethertype_register (next_by_ethertype_t * l3_next, |
| u32 ethertype, u32 next_index) |
| { |
| u32 i; |
| u16 *n; |
| ethernet_main_t *em = ðernet_main; |
| |
| if (CLIB_DEBUG > 0) |
| { |
| ethernet_main_t *em = ðernet_main; |
| em->next_by_ethertype_register_called = 1; |
| } |
| |
| /* Setup ethernet type -> next index sparse vector mapping. */ |
| n = sparse_vec_validate (l3_next->input_next_by_type, ethertype); |
| n[0] = next_index; |
| |
| /* Rebuild next index -> sparse index inverse mapping when sparse vector |
| is updated. */ |
| vec_validate (l3_next->sparse_index_by_input_next_index, next_index); |
| for (i = 1; i < vec_len (l3_next->input_next_by_type); i++) |
| l3_next-> |
| sparse_index_by_input_next_index[l3_next->input_next_by_type[i]] = i; |
| |
| // do not allow the cached next index's to be updated if L3 |
| // redirect is enabled, as it will have overwritten them |
| if (!em->redirect_l3) |
| { |
| // Cache common ethertypes directly |
| if (ethertype == ETHERNET_TYPE_IP4) |
| { |
| l3_next->input_next_ip4 = next_index; |
| } |
| else if (ethertype == ETHERNET_TYPE_IP6) |
| { |
| l3_next->input_next_ip6 = next_index; |
| } |
| else if (ethertype == ETHERNET_TYPE_MPLS) |
| { |
| l3_next->input_next_mpls = next_index; |
| } |
| } |
| return 0; |
| } |
| |
| |
| static clib_error_t * |
| ethernet_input_init (vlib_main_t * vm) |
| { |
| ethernet_main_t *em = ðernet_main; |
| __attribute__ ((unused)) vlan_table_t *invalid_vlan_table; |
| __attribute__ ((unused)) qinq_table_t *invalid_qinq_table; |
| |
| ethernet_setup_node (vm, ethernet_input_node.index); |
| ethernet_setup_node (vm, ethernet_input_type_node.index); |
| ethernet_setup_node (vm, ethernet_input_not_l2_node.index); |
| |
| next_by_ethertype_init (&em->l3_next); |
| |
| // Initialize pools and vector for vlan parsing |
| vec_validate (em->main_intfs, 10); // 10 main interfaces |
| pool_alloc (em->vlan_pool, 10); |
| pool_alloc (em->qinq_pool, 1); |
| |
| // The first vlan pool will always be reserved for an invalid table |
| pool_get (em->vlan_pool, invalid_vlan_table); // first id = 0 |
| // The first qinq pool will always be reserved for an invalid table |
| pool_get (em->qinq_pool, invalid_qinq_table); // first id = 0 |
| |
| return 0; |
| } |
| |
| VLIB_INIT_FUNCTION (ethernet_input_init); |
| |
| void |
| ethernet_register_input_type (vlib_main_t * vm, |
| ethernet_type_t type, u32 node_index) |
| { |
| ethernet_main_t *em = ðernet_main; |
| ethernet_type_info_t *ti; |
| u32 i; |
| |
| { |
| clib_error_t *error = vlib_call_init_function (vm, ethernet_init); |
| if (error) |
| clib_error_report (error); |
| } |
| |
| ti = ethernet_get_type_info (em, type); |
| ti->node_index = node_index; |
| ti->next_index = vlib_node_add_next (vm, |
| ethernet_input_node.index, node_index); |
| i = vlib_node_add_next (vm, ethernet_input_type_node.index, node_index); |
| ASSERT (i == ti->next_index); |
| |
| i = vlib_node_add_next (vm, ethernet_input_not_l2_node.index, node_index); |
| ASSERT (i == ti->next_index); |
| |
| // Add the L3 node for this ethertype to the next nodes structure |
| next_by_ethertype_register (&em->l3_next, type, ti->next_index); |
| |
| // Call the registration functions for other nodes that want a mapping |
| l2bvi_register_input_type (vm, type, node_index); |
| } |
| |
| void |
| ethernet_register_l2_input (vlib_main_t * vm, u32 node_index) |
| { |
| ethernet_main_t *em = ðernet_main; |
| u32 i; |
| |
| em->l2_next = |
| vlib_node_add_next (vm, ethernet_input_node.index, node_index); |
| |
| /* |
| * Even if we never use these arcs, we have to align the next indices... |
| */ |
| i = vlib_node_add_next (vm, ethernet_input_type_node.index, node_index); |
| |
| ASSERT (i == em->l2_next); |
| |
| i = vlib_node_add_next (vm, ethernet_input_not_l2_node.index, node_index); |
| ASSERT (i == em->l2_next); |
| } |
| |
| // Register a next node for L3 redirect, and enable L3 redirect |
| void |
| ethernet_register_l3_redirect (vlib_main_t * vm, u32 node_index) |
| { |
| ethernet_main_t *em = ðernet_main; |
| u32 i; |
| |
| em->redirect_l3 = 1; |
| em->redirect_l3_next = vlib_node_add_next (vm, |
| ethernet_input_node.index, |
| node_index); |
| /* |
| * Change the cached next nodes to the redirect node |
| */ |
| em->l3_next.input_next_ip4 = em->redirect_l3_next; |
| em->l3_next.input_next_ip6 = em->redirect_l3_next; |
| em->l3_next.input_next_mpls = em->redirect_l3_next; |
| |
| /* |
| * Even if we never use these arcs, we have to align the next indices... |
| */ |
| i = vlib_node_add_next (vm, ethernet_input_type_node.index, node_index); |
| |
| ASSERT (i == em->redirect_l3_next); |
| |
| i = vlib_node_add_next (vm, ethernet_input_not_l2_node.index, node_index); |
| |
| ASSERT (i == em->redirect_l3_next); |
| } |
| |
| /* |
| * fd.io coding-style-patch-verification: ON |
| * |
| * Local Variables: |
| * eval: (c-set-style "gnu") |
| * End: |
| */ |