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
31 static_always_inline u32
32 l2_to_bvi_dmac_check (vnet_hw_interface_t * hi, u8 * dmac,
33 ethernet_interface_t * ei, u8 have_sec_dmac)
35 ethernet_interface_address_t *sec_addr;
37 if (ethernet_mac_address_equal (dmac, hi->hw_address))
42 vec_foreach (sec_addr, ei->secondary_addrs)
44 if (ethernet_mac_address_equal (dmac, sec_addr->mac.bytes))
49 return TO_BVI_ERR_BAD_MAC;
53 * Send a packet from L2 processing to L3 via the BVI interface.
54 * Set next0 to the proper L3 input node.
55 * Return an error if the packet isn't what we expect.
58 static_always_inline u32
59 l2_to_bvi (vlib_main_t * vlib_main,
60 vnet_main_t * vnet_main,
62 u32 bvi_sw_if_index, next_by_ethertype_t * l3_next, u16 * next0)
64 ethernet_main_t *em = ðernet_main;
66 /* Perform L3 my-mac filter */
67 ethernet_header_t *e0 = vlib_buffer_get_current (b0);
68 if (!ethernet_address_cast (e0->dst_address))
70 vnet_hw_interface_t *hi =
71 vnet_get_sup_hw_interface (vnet_main, bvi_sw_if_index);
72 ethernet_interface_t *ei = ethernet_get_interface (em, hi->hw_if_index);
75 if (PREDICT_FALSE (ei && (vec_len (ei->secondary_addrs) > 0)))
76 rv = l2_to_bvi_dmac_check (hi, e0->dst_address, ei,
77 1 /* have_sec_dmac */ );
79 rv = l2_to_bvi_dmac_check (hi, e0->dst_address, ei,
80 0 /* have_sec_dmac */ );
82 if (rv != TO_BVI_ERR_OK)
86 /* Save L2 header position which may be changed due to packet replication */
87 vnet_buffer (b0)->l2_hdr_offset = b0->current_data;
90 u8 l2_len = vnet_buffer (b0)->l2.l2_len;
91 vlib_buffer_advance (b0, l2_len);
93 u8 *l3h = vlib_buffer_get_current (b0);
94 u16 ethertype = clib_net_to_host_u16 (*(u16 *) (l3h - 2));
96 /* Set the input interface to be the BVI interface */
97 vnet_buffer (b0)->sw_if_index[VLIB_RX] = bvi_sw_if_index;
98 vnet_buffer (b0)->sw_if_index[VLIB_TX] = ~0;
100 /* Go to appropriate L3 input node */
101 if (ethertype == ETHERNET_TYPE_IP4)
103 *next0 = l3_next->input_next_ip4;
105 else if (ethertype == ETHERNET_TYPE_IP6)
107 *next0 = l3_next->input_next_ip6;
111 /* uncommon ethertype, check table */
112 u32 i0 = sparse_vec_index (l3_next->input_next_by_type, ethertype);
113 *next0 = vec_elt (l3_next->input_next_by_type, i0);
115 if (i0 == SPARSE_VEC_INVALID_INDEX)
117 return TO_BVI_ERR_ETHERTYPE;
121 /* increment BVI RX interface stat */
122 vlib_increment_combined_counter
123 (vnet_main->interface_main.combined_sw_if_counters
124 + VNET_INTERFACE_COUNTER_RX,
125 vlib_main->thread_index, bvi_sw_if_index,
126 1, vlib_buffer_length_in_chain (vlib_main, b0));
127 return TO_BVI_ERR_OK;
131 l2bvi_register_input_type (vlib_main_t * vm,
132 ethernet_type_t type, u32 node_index);
134 extern int l2_bvi_create (u32 instance, const mac_address_t * mac,
136 extern int l2_bvi_delete (u32 sw_if_index);
141 * fd.io coding-style-patch-verification: ON
144 * eval: (c-set-style "gnu")