--- /dev/null
+/*
+ * l2_output_acl.c : layer 2 output acl processing
+ *
+ * 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.
+ */
+
+#include <vlib/vlib.h>
+#include <vnet/vnet.h>
+#include <vnet/pg/pg.h>
+#include <vnet/ethernet/ethernet.h>
+#include <vnet/ethernet/packet.h>
+#include <vnet/ip/ip_packet.h>
+#include <vnet/ip/ip4_packet.h>
+#include <vnet/ip/ip6_packet.h>
+#include <vlib/cli.h>
+#include <vnet/l2/feat_bitmap.h>
+#include <vnet/l2/l2_output.h>
+
+#include <vppinfra/error.h>
+#include <vppinfra/hash.h>
+#include <vppinfra/cache.h>
+
+
+typedef struct {
+ // Next nodes for features and output interfaces
+ l2_output_next_nodes_st next_nodes;
+
+ /* convenience variables */
+ vlib_main_t * vlib_main;
+ vnet_main_t * vnet_main;
+} l2_outacl_main_t;
+
+
+
+typedef struct {
+ /* per-pkt trace data */
+ u8 src[6];
+ u8 dst[6];
+ u32 next_index;
+ u32 sw_if_index;
+} l2_outacl_trace_t;
+
+/* packet trace format function */
+static u8 * format_l2_outacl_trace (u8 * s, va_list * args)
+{
+ CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
+ CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
+ l2_outacl_trace_t * t = va_arg (*args, l2_outacl_trace_t *);
+
+ s = format (s, "l2-output-acl: sw_if_index %d dst %U src %U",
+ t->sw_if_index,
+ format_ethernet_address, t->dst,
+ format_ethernet_address, t->src);
+ return s;
+}
+
+l2_outacl_main_t l2_outacl_main;
+
+static vlib_node_registration_t l2_outacl_node;
+
+#define foreach_l2_outacl_error \
+_(L2_OUTACL, "L2 output ACL packets") \
+_(DROP, "L2 output drops")
+
+typedef enum {
+#define _(sym,str) L2_OUTACL_ERROR_##sym,
+ foreach_l2_outacl_error
+#undef _
+ L2_OUTACL_N_ERROR,
+} l2_outacl_error_t;
+
+static char * l2_outacl_error_strings[] = {
+#define _(sym,string) string,
+ foreach_l2_outacl_error
+#undef _
+};
+
+typedef enum {
+ L2_OUTACL_NEXT_DROP,
+ L2_OUTACL_N_NEXT,
+} l2_outacl_next_t;
+
+
+
+static uword
+l2_outacl_node_fn (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+ u32 n_left_from, * from, * to_next;
+ l2_outacl_next_t next_index;
+ l2_outacl_main_t * msm = &l2_outacl_main;
+ vlib_node_t *n = vlib_get_node (vm, l2_outacl_node.index);
+ u32 node_counter_base_index = n->error_heap_index;
+ vlib_error_main_t * em = &vm->error_main;
+ u32 cached_sw_if_index = (u32)~0;
+ u32 cached_next_index = (u32)~0;
+
+ from = vlib_frame_vector_args (frame);
+ n_left_from = frame->n_vectors; /* number of packets to process */
+ next_index = node->cached_next_index;
+
+ while (n_left_from > 0)
+ {
+ u32 n_left_to_next;
+
+ /* get space to enqueue frame to graph node "next_index" */
+ vlib_get_next_frame (vm, node, next_index,
+ to_next, n_left_to_next);
+
+ while (0 && n_left_from >= 4 && n_left_to_next >= 2)
+ {
+ u32 bi0, bi1;
+ vlib_buffer_t * b0, * b1;
+ u32 next0, next1;
+ u32 sw_if_index0, sw_if_index1;
+ ethernet_header_t * h0, * h1;
+
+ /* Prefetch next iteration. */
+ {
+ vlib_buffer_t * p2, * p3;
+
+ p2 = vlib_get_buffer (vm, from[2]);
+ p3 = vlib_get_buffer (vm, from[3]);
+
+ vlib_prefetch_buffer_header (p2, LOAD);
+ vlib_prefetch_buffer_header (p3, LOAD);
+
+ CLIB_PREFETCH (p2->data, CLIB_CACHE_LINE_BYTES, STORE);
+ CLIB_PREFETCH (p3->data, CLIB_CACHE_LINE_BYTES, STORE);
+ }
+
+ /* speculatively enqueue b0 and b1 to the current next frame */
+ /* bi is "buffer index", b is pointer to the buffer */
+ to_next[0] = bi0 = from[0];
+ to_next[1] = bi1 = from[1];
+ from += 2;
+ to_next += 2;
+ n_left_from -= 2;
+ n_left_to_next -= 2;
+
+ b0 = vlib_get_buffer (vm, bi0);
+ b1 = vlib_get_buffer (vm, bi1);
+
+ /* TX interface handles */
+ sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_TX];
+ sw_if_index1 = vnet_buffer(b1)->sw_if_index[VLIB_TX];
+
+ if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)))
+ {
+ if (b0->flags & VLIB_BUFFER_IS_TRACED)
+ {
+ l2_outacl_trace_t *t =
+ vlib_add_trace (vm, node, b0, sizeof (*t));
+ t->sw_if_index = sw_if_index0;
+ t->next_index = next0;
+ memcpy(t->src, h0->src_address, 6);
+ memcpy(t->dst, h0->dst_address, 6);
+ }
+ if (b1->flags & VLIB_BUFFER_IS_TRACED)
+ {
+ l2_outacl_trace_t *t =
+ vlib_add_trace (vm, node, b1, sizeof (*t));
+ t->sw_if_index = sw_if_index1;
+ t->next_index = next1;
+ memcpy(t->src, h1->src_address, 6);
+ memcpy(t->dst, h1->dst_address, 6);
+ }
+ }
+
+ em->counters[node_counter_base_index + L2_OUTACL_ERROR_L2_OUTACL] += 2;
+
+ /* add core loop code here */
+
+ /* verify speculative enqueues, maybe switch current next frame */
+ /* if next0==next1==next_index then nothing special needs to be done */
+ vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
+ to_next, n_left_to_next,
+ bi0, bi1, next0, next1);
+ }
+
+ while (n_left_from > 0 && n_left_to_next > 0)
+ {
+ u32 bi0;
+ vlib_buffer_t * b0;
+ u32 next0;
+ u32 sw_if_index0;
+ ethernet_header_t * h0;
+ u32 feature_bitmap0;
+
+ /* speculatively enqueue b0 to the current next frame */
+ bi0 = from[0];
+ to_next[0] = bi0;
+ from += 1;
+ to_next += 1;
+ n_left_from -= 1;
+ n_left_to_next -= 1;
+
+ b0 = vlib_get_buffer (vm, bi0);
+ h0 = vlib_buffer_get_current (b0);
+
+ sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_TX];
+
+ if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)
+ && (b0->flags & VLIB_BUFFER_IS_TRACED))) {
+ l2_outacl_trace_t *t =
+ vlib_add_trace (vm, node, b0, sizeof (*t));
+ t->sw_if_index = sw_if_index0;
+ memcpy(t->src, h0->src_address, 6);
+ memcpy(t->dst, h0->dst_address, 6);
+ }
+
+ em->counters[node_counter_base_index + L2_OUTACL_ERROR_L2_OUTACL] += 1;
+
+ // L2_OUTACL code
+ // Dummy for now, just go to next feature node
+
+
+ // Remove ourself from the feature bitmap
+ feature_bitmap0 = vnet_buffer(b0)->l2.feature_bitmap & ~L2OUTPUT_FEAT_ACL;
+
+ // Determine next node
+ l2_output_dispatch (msm->vlib_main,
+ msm->vnet_main,
+ node,
+ l2_outacl_node.index,
+ &cached_sw_if_index,
+ &cached_next_index,
+ &msm->next_nodes,
+ b0,
+ sw_if_index0,
+ feature_bitmap0,
+ &next0);
+
+ /* verify speculative enqueue, maybe switch current next frame */
+ vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
+ to_next, n_left_to_next,
+ bi0, next0);
+ }
+
+ vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+ }
+
+ return frame->n_vectors;
+}
+
+
+VLIB_REGISTER_NODE (l2_outacl_node,static) = {
+ .function = l2_outacl_node_fn,
+ .name = "l2-output-acl",
+ .vector_size = sizeof (u32),
+ .format_trace = format_l2_outacl_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+
+ .n_errors = ARRAY_LEN(l2_outacl_error_strings),
+ .error_strings = l2_outacl_error_strings,
+
+ .n_next_nodes = L2_OUTACL_N_NEXT,
+
+ /* edit / add dispositions here */
+ .next_nodes = {
+ [L2_OUTACL_NEXT_DROP] = "error-drop",
+ },
+};
+
+clib_error_t *l2_outacl_init (vlib_main_t *vm)
+{
+ l2_outacl_main_t * mp = &l2_outacl_main;
+
+ mp->vlib_main = vm;
+ mp->vnet_main = vnet_get_main();
+
+ // Initialize the feature next-node indexes
+ feat_bitmap_init_next_nodes(vm,
+ l2_outacl_node.index,
+ L2OUTPUT_N_FEAT,
+ l2output_get_feat_names(),
+ mp->next_nodes.feat_next_node_index);
+
+ // Initialize the output node mapping table
+ l2output_init_output_node_vec(&mp->next_nodes.output_node_index_vec);
+
+ return 0;
+}
+
+VLIB_INIT_FUNCTION (l2_outacl_init);
+
+// set subinterface outacl enable/disable
+// The CLI format is:
+// set interface acl output <interface> [disable]
+static clib_error_t *
+int_l2_outacl (vlib_main_t * vm,
+ unformat_input_t * input,
+ vlib_cli_command_t * cmd)
+{
+ vnet_main_t * vnm = vnet_get_main();
+ clib_error_t * error = 0;
+ u32 sw_if_index;
+ u32 enable;
+
+ if (! unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
+ {
+ error = clib_error_return (0, "unknown interface `%U'",
+ format_unformat_error, input);
+ goto done;
+ }
+
+ enable = 1;
+ if (unformat (input, "disable")) {
+ enable = 0;
+ }
+
+ // set the interface flag
+ l2output_intf_bitmap_enable(sw_if_index, L2OUTPUT_FEAT_ACL, enable);
+
+ done:
+ return error;
+}
+
+VLIB_CLI_COMMAND (int_l2_outacl_cli, static) = {
+ .path = "set interface acl output",
+ .short_help = "set interface acl output <interface> [disable]",
+ .function = int_l2_outacl,
+};
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