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, u32 * next0)
46 ethernet_header_t *e0;
47 vnet_hw_interface_t *hi;
49 e0 = vlib_buffer_get_current (b0);
50 hi = vnet_get_sup_hw_interface (vnet_main, bvi_sw_if_index);
52 /* Perform L3 my-mac filter */
53 if ((!ethernet_address_cast (e0->dst_address)) &&
54 (!eth_mac_equal ((u8 *) e0, hi->hw_address)))
56 return TO_BVI_ERR_BAD_MAC;
59 /* Save L2 header position which may be changed due to packet replication */
60 vnet_buffer (b0)->ethernet.start_of_ethernet_header = b0->current_data;
63 l2_len = vnet_buffer (b0)->l2.l2_len;
64 vlib_buffer_advance (b0, l2_len);
66 l3h = vlib_buffer_get_current (b0);
67 ethertype = clib_net_to_host_u16 (*(u16 *) (l3h - 2));
69 /* Set the input interface to be the BVI interface */
70 vnet_buffer (b0)->sw_if_index[VLIB_RX] = bvi_sw_if_index;
71 vnet_buffer (b0)->sw_if_index[VLIB_TX] = ~0;
73 /* Go to appropriate L3 input node */
74 if (ethertype == ETHERNET_TYPE_IP4)
76 *next0 = l3_next->input_next_ip4;
78 else if (ethertype == ETHERNET_TYPE_IP6)
80 *next0 = l3_next->input_next_ip6;
84 /* uncommon ethertype, check table */
87 i0 = sparse_vec_index (l3_next->input_next_by_type, ethertype);
88 *next0 = vec_elt (l3_next->input_next_by_type, i0);
90 if (i0 == SPARSE_VEC_INVALID_INDEX)
92 return TO_BVI_ERR_ETHERTYPE;
96 /* increment BVI RX interface stat */
97 vlib_increment_combined_counter
98 (vnet_main->interface_main.combined_sw_if_counters
99 + VNET_INTERFACE_COUNTER_RX,
100 vlib_main->cpu_index,
101 vnet_buffer (b0)->sw_if_index[VLIB_RX],
102 1, vlib_buffer_length_in_chain (vlib_main, b0));
103 return TO_BVI_ERR_OK;
107 l2bvi_register_input_type (vlib_main_t * vm,
108 ethernet_type_t type, u32 node_index);
112 * fd.io coding-style-patch-verification: ON
115 * eval: (c-set-style "gnu")