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-rw-r--r--plugins/acl-plugin/acl/node_in.c168
1 files changed, 168 insertions, 0 deletions
diff --git a/plugins/acl-plugin/acl/node_in.c b/plugins/acl-plugin/acl/node_in.c
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+++ b/plugins/acl-plugin/acl/node_in.c
@@ -0,0 +1,168 @@
+/*
+ * Copyright (c) 2016 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 <vppinfra/error.h>
+#include <acl/acl.h>
+#include "node_in.h"
+
+typedef struct
+{
+ u32 next_index;
+ u32 sw_if_index;
+ u32 match_acl_index;
+ u32 match_rule_index;
+ u32 trace_bitmap;
+} acl_in_trace_t;
+
+/* packet trace format function */
+static u8 *
+format_acl_in_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 *);
+ acl_in_trace_t *t = va_arg (*args, acl_in_trace_t *);
+
+ s =
+ format (s,
+ "ACL_IN: sw_if_index %d, next index %d, match: inacl %d rule %d trace_bits %08x",
+ t->sw_if_index, t->next_index, t->match_acl_index,
+ t->match_rule_index, t->trace_bitmap);
+ return s;
+}
+
+vlib_node_registration_t acl_in_node;
+
+#define foreach_acl_in_error \
+_(ACL_CHECK, "InACL check packets processed")
+
+typedef enum
+{
+#define _(sym,str) ACL_IN_ERROR_##sym,
+ foreach_acl_in_error
+#undef _
+ ACL_IN_N_ERROR,
+} acl_in_error_t;
+
+static char *acl_in_error_strings[] = {
+#define _(sym,string) string,
+ foreach_acl_in_error
+#undef _
+};
+
+static uword
+acl_in_node_fn (vlib_main_t * vm,
+ vlib_node_runtime_t * node, vlib_frame_t * frame)
+{
+ u32 n_left_from, *from, *to_next;
+ acl_in_next_t next_index;
+ u32 pkts_acl_checked = 0;
+ u32 feature_bitmap0;
+ u32 trace_bitmap = 0;
+ u32 *input_feat_next_node_index =
+ acl_main.acl_in_node_input_next_node_index;
+
+ from = vlib_frame_vector_args (frame);
+ n_left_from = frame->n_vectors;
+ next_index = node->cached_next_index;
+
+ while (n_left_from > 0)
+ {
+ u32 n_left_to_next;
+
+ vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
+
+ while (n_left_from > 0 && n_left_to_next > 0)
+ {
+ u32 bi0;
+ vlib_buffer_t *b0;
+ u32 next0 = ~0;
+ u32 sw_if_index0;
+ u32 next = ~0;
+ u32 match_acl_index = ~0;
+ u32 match_rule_index = ~0;
+
+ /* 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);
+
+
+ sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
+ feature_bitmap0 = vnet_buffer (b0)->l2.feature_bitmap;
+
+ input_acl_packet_match (sw_if_index0, b0, &next, &match_acl_index,
+ &match_rule_index, &trace_bitmap);
+ if (next != ~0)
+ {
+ next0 = next;
+ }
+ if (next0 == ~0)
+ {
+ next0 =
+ feat_bitmap_get_next_node_index (input_feat_next_node_index,
+ feature_bitmap0);
+ }
+
+ if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
+ && (b0->flags & VLIB_BUFFER_IS_TRACED)))
+ {
+ acl_in_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
+ t->sw_if_index = sw_if_index0;
+ t->next_index = next0;
+ t->match_acl_index = match_acl_index;
+ t->match_rule_index = match_rule_index;
+ t->trace_bitmap = trace_bitmap;
+ }
+
+ next0 = next0 < node->n_next_nodes ? next0 : 0;
+
+ pkts_acl_checked += 1;
+
+ /* 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);
+ }
+
+ vlib_node_increment_counter (vm, acl_in_node.index,
+ ACL_IN_ERROR_ACL_CHECK, pkts_acl_checked);
+ return frame->n_vectors;
+}
+
+VLIB_REGISTER_NODE (acl_in_node) =
+{
+ .function = acl_in_node_fn,.name = "acl-plugin-in",.vector_size =
+ sizeof (u32),.format_trace = format_acl_in_trace,.type =
+ VLIB_NODE_TYPE_INTERNAL,.n_errors =
+ ARRAY_LEN (acl_in_error_strings),.error_strings =
+ acl_in_error_strings,.n_next_nodes = ACL_IN_N_NEXT,
+ /* edit / add dispositions here */
+ .next_nodes =
+ {
+ [ACL_IN_ERROR_DROP] = "error-drop",
+ [ACL_IN_ETHERNET_INPUT] = "ethernet-input",
+ [ACL_IN_L2S_INPUT_IP4_ADD] = "aclp-l2s-input-ip4-add",
+ [ACL_IN_L2S_INPUT_IP6_ADD] = "aclp-l2s-input-ip6-add",}
+,};