/* * l2_bvi.h : layer 2 Bridged Virtual Interface * * Copyright (c) 2013 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. */ #ifndef included_l2bvi_h #define included_l2bvi_h #include <vlib/vlib.h> #include <vnet/ethernet/ethernet.h> #include <vppinfra/sparse_vec.h> #include <vnet/l2/l2_input.h> #define TO_BVI_ERR_OK 0 #define TO_BVI_ERR_BAD_MAC 1 #define TO_BVI_ERR_ETHERTYPE 2 /** * Send a packet from L2 processing to L3 via the BVI interface. * Set next0 to the proper L3 input node. * Return an error if the packet isn't what we expect. */ static_always_inline u32 l2_to_bvi (vlib_main_t * vlib_main, vnet_main_t * vnet_main, vlib_buffer_t * b0, u32 bvi_sw_if_index, next_by_ethertype_t * l3_next, u32 * next0) { u8 l2_len; u16 ethertype; u8 *l3h; ethernet_header_t *e0; vnet_hw_interface_t *hi; e0 = vlib_buffer_get_current (b0); hi = vnet_get_sup_hw_interface (vnet_main, bvi_sw_if_index); /* Perform L3 my-mac filter */ if ((!ethernet_address_cast (e0->dst_address)) && (!eth_mac_equal ((u8 *) e0, hi->hw_address))) { return TO_BVI_ERR_BAD_MAC; } /* Save L2 header position which may be changed due to packet replication */ vnet_buffer (b0)->l2_hdr_offset = b0->current_data; /* Strip L2 header */ l2_len = vnet_buffer (b0)->l2.l2_len; vlib_buffer_advance (b0, l2_len); l3h = vlib_buffer_get_current (b0); ethertype = clib_net_to_host_u16 (*(u16 *) (l3h - 2)); /* Set the input interface to be the BVI interface */ vnet_buffer (b0)->sw_if_index[VLIB_RX] = bvi_sw_if_index; vnet_buffer (b0)->sw_if_index[VLIB_TX] = ~0; /* Go to appropriate L3 input node */ if (ethertype == ETHERNET_TYPE_IP4) { *next0 = l3_next->input_next_ip4; } else if (ethertype == ETHERNET_TYPE_IP6) { *next0 = l3_next->input_next_ip6; } else { /* uncommon ethertype, check table */ u32 i0; i0 = sparse_vec_index (l3_next->input_next_by_type, ethertype); *next0 = vec_elt (l3_next->input_next_by_type, i0); if (i0 == SPARSE_VEC_INVALID_INDEX) { return TO_BVI_ERR_ETHERTYPE; } } /* increment BVI RX interface stat */ vlib_increment_combined_counter (vnet_main->interface_main.combined_sw_if_counters + VNET_INTERFACE_COUNTER_RX, vlib_main->thread_index, vnet_buffer (b0)->sw_if_index[VLIB_RX], 1, vlib_buffer_length_in_chain (vlib_main, b0)); return TO_BVI_ERR_OK; } void l2bvi_register_input_type (vlib_main_t * vm, ethernet_type_t type, u32 node_index); #endif /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */