2 * l2_bvi.h : layer 2 Bridged Virtual Interface
4 * Copyright (c) 2013 Cisco and/or its affiliates.
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at:
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
18 #ifndef included_l2bvi_h
19 #define included_l2bvi_h
21 #include <vlib/vlib.h>
22 #include <vnet/ethernet/ethernet.h>
23 #include <vppinfra/sparse_vec.h>
25 #include <vnet/l2/l2_input.h>
27 #define TO_BVI_ERR_OK 0
28 #define TO_BVI_ERR_BAD_MAC 1
29 #define TO_BVI_ERR_ETHERTYPE 2
32 * Send a packet from L2 processing to L3 via the BVI interface.
33 * Set next0 to the proper L3 input node.
34 * Return an error if the packet isn't what we expect.
37 static_always_inline u32
38 l2_to_bvi (vlib_main_t * vlib_main,
39 vnet_main_t * vnet_main,
41 u32 bvi_sw_if_index, next_by_ethertype_t * l3_next, u16 * next0)
43 /* Perform L3 my-mac filter */
44 ethernet_header_t *e0 = vlib_buffer_get_current (b0);
45 if (!ethernet_address_cast (e0->dst_address))
47 vnet_hw_interface_t *hi =
48 vnet_get_sup_hw_interface (vnet_main, bvi_sw_if_index);
49 if (!eth_mac_equal (e0->dst_address, hi->hw_address))
50 return TO_BVI_ERR_BAD_MAC;
53 /* Save L2 header position which may be changed due to packet replication */
54 vnet_buffer (b0)->l2_hdr_offset = b0->current_data;
57 u8 l2_len = vnet_buffer (b0)->l2.l2_len;
58 vlib_buffer_advance (b0, l2_len);
60 u8 *l3h = vlib_buffer_get_current (b0);
61 u16 ethertype = clib_net_to_host_u16 (*(u16 *) (l3h - 2));
63 /* Set the input interface to be the BVI interface */
64 vnet_buffer (b0)->sw_if_index[VLIB_RX] = bvi_sw_if_index;
65 vnet_buffer (b0)->sw_if_index[VLIB_TX] = ~0;
67 /* Go to appropriate L3 input node */
68 if (ethertype == ETHERNET_TYPE_IP4)
70 *next0 = l3_next->input_next_ip4;
72 else if (ethertype == ETHERNET_TYPE_IP6)
74 *next0 = l3_next->input_next_ip6;
78 /* uncommon ethertype, check table */
79 u32 i0 = sparse_vec_index (l3_next->input_next_by_type, ethertype);
80 *next0 = vec_elt (l3_next->input_next_by_type, i0);
82 if (i0 == SPARSE_VEC_INVALID_INDEX)
84 return TO_BVI_ERR_ETHERTYPE;
88 /* increment BVI RX interface stat */
89 vlib_increment_combined_counter
90 (vnet_main->interface_main.combined_sw_if_counters
91 + VNET_INTERFACE_COUNTER_RX,
92 vlib_main->thread_index, bvi_sw_if_index,
93 1, vlib_buffer_length_in_chain (vlib_main, b0));
98 l2bvi_register_input_type (vlib_main_t * vm,
99 ethernet_type_t type, u32 node_index);
103 * fd.io coding-style-patch-verification: ON
106 * eval: (c-set-style "gnu")