misc: deprecate lawful-intercept

Type: refactor
Change-Id: Ifd7f5b351401cdcaaaf57fefc5dbbfdaf235054e
Signed-off-by: hsandid <halsandi@cisco.com>

1 files changed, 286 insertions, 0 deletions

diff --git a/extras/deprecated/vnet/lawful-intercept/node.c b/extras/deprecated/vnet/lawful-intercept/node.c
new file mode 100644
index 00000000000..86f135b9ea1
--- /dev/null
+++ b/extras/deprecated/vnet/lawful-intercept/node.c
@@ -0,0 +1,286 @@
+/*
+ * Copyright (c) 2015 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 <vppinfra/error.h>
+
+#include <vnet/lawful-intercept/lawful_intercept.h>
+
+#include <vppinfra/error.h>
+#include <vppinfra/elog.h>
+
+extern vlib_node_registration_t li_hit_node;
+
+typedef struct
+{
+  u32 next_index;
+} li_hit_trace_t;
+
+/* packet trace format function */
+static u8 *
+format_li_hit_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 *);
+  li_hit_trace_t *t = va_arg (*args, li_hit_trace_t *);
+
+  s = format (s, "LI_HIT: next index %d", t->next_index);
+
+  return s;
+}
+
+#define foreach_li_hit_error                                    \
+_(HITS, "LI packets processed")                                 \
+_(NO_COLLECTOR, "No collector configured")                      \
+_(BUFFER_ALLOCATION_FAILURE, "Buffer allocation failure")
+
+typedef enum
+{
+#define _(sym,str) LI_HIT_ERROR_##sym,
+  foreach_li_hit_error
+#undef _
+    LI_HIT_N_ERROR,
+} li_hit_error_t;
+
+static char *li_hit_error_strings[] = {
+#define _(sym,string) string,
+  foreach_li_hit_error
+#undef _
+};
+
+typedef enum
+{
+  LI_HIT_NEXT_ETHERNET,
+  LI_HIT_N_NEXT,
+} li_hit_next_t;
+
+VLIB_NODE_FN (li_hit_node) (vlib_main_t * vm,
+			    vlib_node_runtime_t * node, vlib_frame_t * frame)
+{
+  u32 n_left_from, *from, *to_next;
+  li_hit_next_t next_index;
+  vlib_frame_t *int_frame = 0;
+  u32 *to_int_next = 0;
+  li_main_t *lm = &li_main;
+
+  from = vlib_frame_vector_args (frame);
+  n_left_from = frame->n_vectors;
+  next_index = node->cached_next_index;
+
+  if (PREDICT_FALSE (vec_len (lm->collectors) == 0))
+    {
+      vlib_node_increment_counter (vm, li_hit_node.index,
+				   LI_HIT_ERROR_NO_COLLECTOR, n_left_from);
+    }
+  else
+    {
+      /* The intercept frame... */
+      int_frame = vlib_get_frame_to_node (vm, ip4_lookup_node.index);
+      to_int_next = vlib_frame_vector_args (int_frame);
+    }
+
+  while (n_left_from > 0)
+    {
+      u32 n_left_to_next;
+
+      vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
+
+#if 0
+      while (n_left_from >= 4 && n_left_to_next >= 2)
+	{
+	  u32 next0 = LI_HIT_NEXT_INTERFACE_OUTPUT;
+	  u32 next1 = LI_HIT_NEXT_INTERFACE_OUTPUT;
+	  u32 sw_if_index0, sw_if_index1;
+	  u8 tmp0[6], tmp1[6];
+	  ethernet_header_t *en0, *en1;
+	  u32 bi0, bi1;
+	  vlib_buffer_t *b0, *b1;
+
+	  /* 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_store (p2->data);
+	    clib_prefetch_store (p3->data);
+	  }
+
+	  /* 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);
+	  b1 = vlib_get_buffer (vm, bi1);
+
+	  /* $$$$$ Dual loop: process 2 x packets here $$$$$ */
+	  ASSERT (b0->current_data == 0);
+	  ASSERT (b1->current_data == 0);
+
+	  en0 = vlib_buffer_get_current (b0);
+	  en1 = vlib_buffer_get_current (b1);
+
+	  sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
+	  sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_RX];
+
+	  /* Send pkt back out the RX interface */
+	  vnet_buffer (b0)->sw_if_index[VLIB_TX] = sw_if_index0;
+	  vnet_buffer (b1)->sw_if_index[VLIB_TX] = sw_if_index1;
+
+	  /* $$$$$ End of processing 2 x packets $$$$$ */
+
+	  if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)))
+	    {
+	      if (b0->flags & VLIB_BUFFER_IS_TRACED)
+		{
+		  li_hit_trace_t *t =
+		    vlib_add_trace (vm, node, b0, sizeof (*t));
+		  t->sw_if_index = sw_if_index0;
+		  t->next_index = next0;
+		}
+	      if (b1->flags & VLIB_BUFFER_IS_TRACED)
+		{
+		  li_hit_trace_t *t =
+		    vlib_add_trace (vm, node, b1, sizeof (*t));
+		  t->sw_if_index = sw_if_index1;
+		  t->next_index = next1;
+		}
+	    }
+
+	  /* verify speculative enqueues, maybe switch current next frame */
+	  vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
+					   to_next, n_left_to_next,
+					   bi0, bi1, next0, next1);
+	}
+#endif /* $$$ dual-loop off */
+
+      while (n_left_from > 0 && n_left_to_next > 0)
+	{
+	  u32 bi0;
+	  vlib_buffer_t *b0;
+	  vlib_buffer_t *c0;
+	  ip4_udp_header_t *iu0;
+	  ip4_header_t *ip0;
+	  udp_header_t *udp0;
+	  u32 next0 = LI_HIT_NEXT_ETHERNET;
+
+	  /* 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);
+	  if (PREDICT_TRUE (to_int_next != 0))
+	    {
+	      /* Make an intercept copy. This can fail. */
+	      c0 = vlib_buffer_copy (vm, b0);
+
+	      if (PREDICT_FALSE (c0 == 0))
+		{
+		  vlib_node_increment_counter
+		    (vm, node->node_index,
+		     LI_HIT_ERROR_BUFFER_ALLOCATION_FAILURE, 1);
+		  goto skip;
+		}
+
+	      vlib_buffer_advance (c0, -sizeof (*iu0));
+
+	      iu0 = vlib_buffer_get_current (c0);
+	      ip0 = &iu0->ip4;
+
+	      ip0->ip_version_and_header_length = 0x45;
+	      ip0->ttl = 254;
+	      ip0->protocol = IP_PROTOCOL_UDP;
+
+	      ip0->src_address.as_u32 = lm->src_addrs[0].as_u32;
+	      ip0->dst_address.as_u32 = lm->collectors[0].as_u32;
+	      ip0->length = vlib_buffer_length_in_chain (vm, c0);
+	      ip0->checksum = ip4_header_checksum (ip0);
+
+	      udp0 = &iu0->udp;
+	      udp0->src_port = udp0->dst_port =
+		clib_host_to_net_u16 (lm->ports[0]);
+	      udp0->checksum = 0;
+	      udp0->length =
+		clib_net_to_host_u16 (vlib_buffer_length_in_chain (vm, b0));
+
+	      to_int_next[0] = vlib_get_buffer_index (vm, c0);
+	      to_int_next++;
+	    }
+
+	skip:
+	  if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
+			     && (b0->flags & VLIB_BUFFER_IS_TRACED)))
+	    {
+	      li_hit_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
+	      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);
+    }
+
+  if (int_frame)
+    {
+      int_frame->n_vectors = frame->n_vectors;
+      vlib_put_frame_to_node (vm, ip4_lookup_node.index, int_frame);
+    }
+
+  vlib_node_increment_counter (vm, li_hit_node.index,
+			       LI_HIT_ERROR_HITS, frame->n_vectors);
+  return frame->n_vectors;
+}
+
+VLIB_REGISTER_NODE (li_hit_node) = {
+  .name = "li-hit",
+  .vector_size = sizeof (u32),
+  .format_trace = format_li_hit_trace,
+  .type = VLIB_NODE_TYPE_INTERNAL,
+
+  .n_errors = ARRAY_LEN(li_hit_error_strings),
+  .error_strings = li_hit_error_strings,
+
+  .n_next_nodes = LI_HIT_N_NEXT,
+
+  /* edit / add dispositions here */
+  .next_nodes = {
+        [LI_HIT_NEXT_ETHERNET] = "ethernet-input-not-l2",
+  },
+};
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */