adl: move allow/deny list function to plugin

Provide binary API compatibility support for the "cop" APIs until vpp
21.01.

Change the deprecation date in map.api to vpp 21.01.

Type: refactor
Signed-off-by: Dave Barach <dave@barachs.net>
Change-Id: I0e60d96de4ae9ae4448f134cf257934126f3b760

1 files changed, 300 insertions, 0 deletions

diff --git a/src/plugins/adl/ip6_allowlist.c b/src/plugins/adl/ip6_allowlist.c
new file mode 100644
index 00000000000..d272f101b43
--- /dev/null
+++ b/src/plugins/adl/ip6_allowlist.c
@@ -0,0 +1,300 @@
+/*
+ * Copyright (c) 2016,2020 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 <plugins/adl/adl.h>
+#include <vnet/fib/ip6_fib.h>
+#include <vnet/dpo/load_balance.h>
+
+typedef struct {
+  u32 next_index;
+  u32 sw_if_index;
+} ip6_adl_allowlist_trace_t;
+
+/* packet trace format function */
+static u8 * format_ip6_adl_allowlist_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 *);
+  ip6_adl_allowlist_trace_t * t = va_arg (*args, ip6_adl_allowlist_trace_t *);
+
+  s = format (s, "IP6_ADL_ALLOWLIST: sw_if_index %d, next index %d",
+              t->sw_if_index, t->next_index);
+  return s;
+}
+
+#define foreach_ip6_adl_allowlist_error         \
+_(ALLOWED, "ip6 allowlist allowed")             \
+_(DROPPED, "ip6 allowlist dropped")
+
+typedef enum {
+#define _(sym,str) IP6_ADL_ALLOWLIST_ERROR_##sym,
+  foreach_ip6_adl_allowlist_error
+#undef _
+  IP6_ADL_ALLOWLIST_N_ERROR,
+} ip6_adl_allowlist_error_t;
+
+static char * ip6_adl_allowlist_error_strings[] = {
+#define _(sym,string) string,
+  foreach_ip6_adl_allowlist_error
+#undef _
+};
+
+VLIB_NODE_FN (ip6_adl_allowlist_node) (vlib_main_t * vm,
+		  vlib_node_runtime_t * node,
+		  vlib_frame_t * frame)
+{
+  u32 n_left_from, * from, * to_next;
+  adl_feature_type_t next_index;
+  adl_main_t *cm = &adl_main;
+  vlib_combined_counter_main_t * vcm = &load_balance_main.lbm_via_counters;
+  u32 thread_index = vm->thread_index;
+  u32 allowed_packets;
+
+  from = vlib_frame_vector_args (frame);
+  n_left_from = frame->n_vectors;
+  allowed_packets = n_left_from;
+  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 >= 4 && n_left_to_next >= 2)
+	{
+          u32 bi0, bi1;
+          vlib_buffer_t * b0, * b1;
+          u32 next0, next1;
+          u32 sw_if_index0, sw_if_index1;
+          ip6_header_t * ip0, * ip1;
+          adl_config_main_t * ccm0, * ccm1;
+          adl_config_data_t * c0, * c1;
+          u32 lb_index0, lb_index1;
+          const load_balance_t * lb0, *lb1;
+          const dpo_id_t *dpo0, *dpo1;
+
+	  /* 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 */
+	  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);
+          sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX];
+
+	  ip0 = vlib_buffer_get_current (b0);
+
+	  ccm0 = cm->adl_config_mains + VNET_ADL_IP6;
+
+	  c0 = vnet_get_config_data
+              (&ccm0->config_main,
+               &adl_buffer (b0)->adl.current_config_index,
+               &next0,
+               sizeof (c0[0]));
+
+          lb_index0 = ip6_fib_table_fwding_lookup (c0->fib_index,
+						    &ip0->src_address);
+	  lb0 = load_balance_get (lb_index0);
+          dpo0 = load_balance_get_bucket_i(lb0, 0);
+
+          if (PREDICT_FALSE(dpo0->dpoi_type != DPO_RECEIVE))
+            {
+              b0->error = node->errors[IP6_ADL_ALLOWLIST_ERROR_DROPPED];
+              allowed_packets--;
+              next0 = RX_ADL_DROP;
+            }
+
+	  b1 = vlib_get_buffer (vm, bi1);
+          sw_if_index1 = vnet_buffer(b1)->sw_if_index[VLIB_RX];
+
+	  ip1 = vlib_buffer_get_current (b1);
+
+	  ccm1 = cm->adl_config_mains + VNET_ADL_IP6;
+
+	  c1 = vnet_get_config_data
+              (&ccm1->config_main,
+               &adl_buffer (b1)->adl.current_config_index,
+               &next1,
+               sizeof (c1[0]));
+
+          lb_index1 = ip6_fib_table_fwding_lookup (c1->fib_index,
+						    &ip1->src_address);
+
+	  lb1 = load_balance_get (lb_index1);
+          dpo1 = load_balance_get_bucket_i(lb1, 0);
+
+          vlib_increment_combined_counter
+              (vcm, thread_index, lb_index0, 1,
+               vlib_buffer_length_in_chain (vm, b0)
+               + sizeof(ethernet_header_t));
+
+          vlib_increment_combined_counter
+              (vcm, thread_index, lb_index1, 1,
+               vlib_buffer_length_in_chain (vm, b1)
+               + sizeof(ethernet_header_t));
+
+          if (PREDICT_FALSE(dpo1->dpoi_type != DPO_RECEIVE))
+            {
+              b1->error = node->errors[IP6_ADL_ALLOWLIST_ERROR_DROPPED];
+              allowed_packets--;
+              next1 = RX_ADL_DROP;
+            }
+
+          if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)
+                            && (b0->flags & VLIB_BUFFER_IS_TRACED)))
+            {
+              ip6_adl_allowlist_trace_t *t =
+                 vlib_add_trace (vm, node, b0, sizeof (*t));
+              t->sw_if_index = sw_if_index0;
+              t->next_index = next0;
+            }
+
+          if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)
+                            && (b1->flags & VLIB_BUFFER_IS_TRACED)))
+            {
+              ip6_adl_allowlist_trace_t *t =
+                 vlib_add_trace (vm, node, b1, sizeof (*t));
+              t->sw_if_index = sw_if_index1;
+              t->next_index = next1;
+            }
+
+          /* verify speculative enqueues, maybe switch current next frame */
+          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;
+          ip6_header_t * ip0;
+          adl_config_main_t *ccm0;
+          adl_config_data_t *c0;
+          u32 lb_index0;
+          const load_balance_t * lb0;
+          const dpo_id_t *dpo0;
+
+          /* 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 = adl_buffer(b0)->sw_if_index[VLIB_RX];
+
+	  ip0 = vlib_buffer_get_current (b0);
+
+	  ccm0 = cm->adl_config_mains + VNET_ADL_IP6;
+
+	  c0 = vnet_get_config_data
+              (&ccm0->config_main,
+               &adl_buffer (b0)->adl.current_config_index,
+               &next0,
+               sizeof (c0[0]));
+
+          lb_index0 = ip6_fib_table_fwding_lookup (c0->fib_index,
+						    &ip0->src_address);
+
+	  lb0 = load_balance_get (lb_index0);
+          dpo0 = load_balance_get_bucket_i(lb0, 0);
+
+          vlib_increment_combined_counter
+              (vcm, thread_index, lb_index0, 1,
+               vlib_buffer_length_in_chain (vm, b0)
+               + sizeof(ethernet_header_t));
+
+          if (PREDICT_FALSE(dpo0->dpoi_type != DPO_RECEIVE))
+            {
+              b0->error = node->errors[IP6_ADL_ALLOWLIST_ERROR_DROPPED];
+              allowed_packets--;
+              next0 = RX_ADL_DROP;
+            }
+
+          if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)
+                            && (b0->flags & VLIB_BUFFER_IS_TRACED)))
+            {
+              ip6_adl_allowlist_trace_t *t =
+                 vlib_add_trace (vm, node, b0, sizeof (*t));
+              t->sw_if_index = sw_if_index0;
+              t->next_index = 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);
+    }
+  vlib_node_increment_counter (vm, node->node_index,
+			       IP6_ADL_ALLOWLIST_ERROR_ALLOWED,
+                               allowed_packets);
+  return frame->n_vectors;
+}
+
+VLIB_REGISTER_NODE (ip6_adl_allowlist_node) = {
+  .name = "ip6-adl-allowlist",
+  .vector_size = sizeof (u32),
+  .format_trace = format_ip6_adl_allowlist_trace,
+  .type = VLIB_NODE_TYPE_INTERNAL,
+
+  .n_errors = ARRAY_LEN(ip6_adl_allowlist_error_strings),
+  .error_strings = ip6_adl_allowlist_error_strings,
+
+  .n_next_nodes = ADL_RX_N_FEATURES,
+
+  /* edit / add dispositions here */
+  .next_nodes = {
+    [IP4_RX_ADL_ALLOWLIST] = "ip4-adl-allowlist",
+    [IP6_RX_ADL_ALLOWLIST] = "ip6-adl-allowlist",
+    [DEFAULT_RX_ADL_ALLOWLIST] = "default-adl-allowlist",
+    [IP4_RX_ADL_INPUT] = "ip4-input",
+    [IP6_RX_ADL_INPUT] = "ip6-input",
+    [DEFAULT_RX_ADL_INPUT] = "ethernet-input",
+    [RX_ADL_DROP] = "error-drop",
+  },
+};
+
+static clib_error_t *
+ip6_allowlist_init (vlib_main_t * vm)
+{
+  return 0;
+}
+
+VLIB_INIT_FUNCTION (ip6_allowlist_init);