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-rw-r--r--src/vnet/l2/l2_bvi.h117
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diff --git a/src/vnet/l2/l2_bvi.h b/src/vnet/l2/l2_bvi.h
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+/*
+ * 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)->ethernet.start_of_ethernet_header = 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->cpu_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:
+ */