Revert to [HICN-638] Check if systemd is running before enabling hicn-light service

Signed-off-by: Mauro Sardara <msardara@cisco.com>
Change-Id: I1810d96e001a4e6e097e1efa331b682af750925d

1 files changed, 314 insertions, 0 deletions

diff --git a/hicn-plugin/src/faces/app/face_prod_node.c b/hicn-plugin/src/faces/app/face_prod_node.c
new file mode 100644
index 000000000..80c3e124c
--- /dev/null
+++ b/hicn-plugin/src/faces/app/face_prod_node.c
@@ -0,0 +1,314 @@
+/*
+ * Copyright (c) 2017-2020 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.
+ */
+
+/**
+ * @file
+ *
+ * @brief Application interface node
+ *
+ * This node runs after the device-input node and perfoms some safety checks in
+ * order to avoid unespected interest and data (i.e., hICN packets whose name do
+ * not contain the prefix associated to the application face)
+ */
+
+#include "face_prod.h"
+#include "../../hicn_api.h"
+#include "../../mgmt.h"
+
+static __clib_unused char *face_prod_input_error_strings[] = {
+#define _(sym, string) string,
+  foreach_hicnfwd_error
+#undef _
+};
+
+/* Node context data */
+typedef struct hicn_face_prod_runtime_s
+{
+  int id;
+} hicn_face_prod_runtime_t;
+
+typedef struct
+{
+  u32 next_index;
+  u32 sw_if_index;
+} hicn_face_prod_input_trace_t;
+
+typedef enum
+{
+  HICN_FACE_PROD_NEXT_DATA_IP4,
+  HICN_FACE_PROD_NEXT_DATA_IP6,
+  HICN_FACE_PROD_NEXT_ERROR_DROP,
+  HICN_FACE_PROD_N_NEXT,
+} hicn_face_prod_next_t;
+
+vlib_node_registration_t hicn_face_prod_input_node;
+
+static __clib_unused u8 *
+format_face_prod_input_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 *);
+  hicn_face_prod_input_trace_t *t =
+    va_arg (*args, hicn_face_prod_input_trace_t *);
+  CLIB_UNUSED (u32 indent) = format_get_indent (s);
+
+  s = format (s, "prod-face: sw_if_index %d next-index %d",
+	      t->sw_if_index, t->next_index);
+  return s;
+}
+
+static_always_inline int
+match_ip4_name (u32 * name, fib_prefix_t * prefix)
+{
+  u32 xor = 0;
+
+  xor = *name & prefix->fp_addr.ip4.data_u32;
+
+  return xor == prefix->fp_addr.ip4.data_u32;
+}
+
+static_always_inline int
+match_ip6_name (u8 * name, fib_prefix_t * prefix)
+{
+  union
+  {
+    u32x4 as_u32x4;
+    u64 as_u64[2];
+    u32 as_u32[4];
+  } xor_sum __attribute__ ((aligned (sizeof (u32x4))));
+
+  xor_sum.as_u64[0] = ((u64 *) name)[0] & prefix->fp_addr.ip6.as_u64[0];
+  xor_sum.as_u64[1] = ((u64 *) name)[1] & prefix->fp_addr.ip6.as_u64[1];
+
+  return (xor_sum.as_u64[0] == prefix->fp_addr.ip6.as_u64[0]) &&
+    (xor_sum.as_u64[1] == prefix->fp_addr.ip6.as_u64[1]);
+}
+
+static_always_inline u32
+hicn_face_prod_next_from_data_hdr (vlib_node_runtime_t * node,
+				   vlib_buffer_t * b, fib_prefix_t * prefix)
+{
+  u8 *ptr = vlib_buffer_get_current (b);
+  u8 v = *ptr & 0xf0;
+  int match_res = 1;
+
+  if (PREDICT_TRUE (v == 0x40 && ip46_address_is_ip4 (&prefix->fp_addr)))
+    {
+      match_res = match_ip4_name ((u32 *) & (ptr[12]), prefix);
+    }
+  else if (PREDICT_TRUE (v == 0x60 && !ip46_address_is_ip4 (&prefix->fp_addr)))
+    {
+      match_res = match_ip6_name (& (ptr[8]), prefix);
+    }
+
+  return match_res ? HICN_FACE_PROD_NEXT_DATA_IP4 + (v ==
+						     0x60) :
+    HICN_FACE_PROD_NEXT_ERROR_DROP;
+}
+
+static_always_inline void
+hicn_face_prod_trace_buffer (vlib_main_t * vm, vlib_node_runtime_t * node,
+			     u32 swif, vlib_buffer_t * b, u32 next)
+{
+  if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) &&
+		     (b->flags & VLIB_BUFFER_IS_TRACED)))
+    {
+      hicn_face_prod_input_trace_t *t =
+	vlib_add_trace (vm, node, b, sizeof (*t));
+      t->next_index = next;
+      t->sw_if_index = swif;
+    }
+}
+
+static uword
+hicn_face_prod_input_node_fn (vlib_main_t * vm,
+			      vlib_node_runtime_t * node,
+			      vlib_frame_t * frame)
+{
+  u32 n_left_from, *from, *to_next;
+  hicn_face_prod_next_t next_index;
+  vl_api_hicn_api_node_stats_get_reply_t stats = { 0 };
+
+  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 >= 8 && n_left_to_next >= 4)
+	{
+	  vlib_buffer_t *b0, *b1, *b2, *b3;
+	  u32 bi0, bi1, bi2, bi3;
+	  hicn_face_prod_state_t *prod_face0 = NULL;
+	  hicn_face_prod_state_t *prod_face1 = NULL;
+	  hicn_face_prod_state_t *prod_face2 = NULL;
+	  hicn_face_prod_state_t *prod_face3 = NULL;
+	  u32 next0, next1, next2, next3;
+
+	  {
+	    vlib_buffer_t *b4, *b5, *b6, *b7;
+	    b4 = vlib_get_buffer (vm, from[4]);
+	    b5 = vlib_get_buffer (vm, from[5]);
+	    b6 = vlib_get_buffer (vm, from[6]);
+	    b7 = vlib_get_buffer (vm, from[7]);
+	    CLIB_PREFETCH (b4, CLIB_CACHE_LINE_BYTES, STORE);
+	    CLIB_PREFETCH (b5, CLIB_CACHE_LINE_BYTES, STORE);
+	    CLIB_PREFETCH (b6, CLIB_CACHE_LINE_BYTES, STORE);
+	    CLIB_PREFETCH (b7, CLIB_CACHE_LINE_BYTES, STORE);
+	  }
+
+	  bi0 = from[0];
+	  bi1 = from[1];
+	  bi2 = from[2];
+	  bi3 = from[3];
+
+	  from += 4;
+	  n_left_from -= 4;
+	  to_next[0] = bi0;
+	  to_next[1] = bi1;
+	  to_next[2] = bi2;
+	  to_next[3] = bi3;
+
+	  to_next += 4;
+	  n_left_to_next -= 4;
+
+	  b0 = vlib_get_buffer (vm, bi0);
+	  b1 = vlib_get_buffer (vm, bi1);
+	  b2 = vlib_get_buffer (vm, bi2);
+	  b3 = vlib_get_buffer (vm, bi3);
+
+	  prod_face0 =
+	    &face_state_vec[vnet_buffer (b0)->sw_if_index[VLIB_RX]];
+	  prod_face1 =
+	    &face_state_vec[vnet_buffer (b1)->sw_if_index[VLIB_RX]];
+	  prod_face2 =
+	    &face_state_vec[vnet_buffer (b2)->sw_if_index[VLIB_RX]];
+	  prod_face3 =
+	    &face_state_vec[vnet_buffer (b3)->sw_if_index[VLIB_RX]];
+
+	  next0 =
+	    hicn_face_prod_next_from_data_hdr (node, b0, &prod_face0->prefix);
+	  next1 =
+	    hicn_face_prod_next_from_data_hdr (node, b1, &prod_face1->prefix);
+	  next2 =
+	    hicn_face_prod_next_from_data_hdr (node, b2, &prod_face2->prefix);
+	  next3 =
+	    hicn_face_prod_next_from_data_hdr (node, b3, &prod_face3->prefix);
+	  stats.pkts_data_count += 4;
+
+	  /* trace */
+	  hicn_face_prod_trace_buffer (vm, node,
+				       vnet_buffer (b0)->sw_if_index[VLIB_RX],
+				       b0, next0);
+	  hicn_face_prod_trace_buffer (vm, node,
+				       vnet_buffer (b1)->sw_if_index[VLIB_RX],
+				       b1, next1);
+	  hicn_face_prod_trace_buffer (vm, node,
+				       vnet_buffer (b2)->sw_if_index[VLIB_RX],
+				       b2, next2);
+	  hicn_face_prod_trace_buffer (vm, node,
+				       vnet_buffer (b3)->sw_if_index[VLIB_RX],
+				       b3, next3);
+
+	  /* enqueue */
+	  vlib_validate_buffer_enqueue_x4 (vm, node, next_index, to_next,
+					   n_left_to_next, bi0, bi1, bi2, bi3,
+					   next0, next1, next2, next3);
+
+	  stats.pkts_processed += 4;
+
+	}
+
+      while (n_left_from > 0 && n_left_to_next > 0)
+	{
+	  vlib_buffer_t *b0;
+	  u32 bi0, swif;
+	  hicn_face_prod_state_t *prod_face = NULL;
+	  u32 next0;
+
+	  if (n_left_from > 1)
+	    {
+	      vlib_buffer_t *b1;
+	      b1 = vlib_get_buffer (vm, from[1]);
+	      CLIB_PREFETCH (b1, CLIB_CACHE_LINE_BYTES, STORE);
+	    }
+
+	  bi0 = from[0];
+	  from += 1;
+	  n_left_from -= 1;
+	  to_next[0] = bi0;
+	  to_next += 1;
+	  n_left_to_next -= 1;
+
+	  b0 = vlib_get_buffer (vm, bi0);
+	  swif = vnet_buffer (b0)->sw_if_index[VLIB_RX];
+	  prod_face = &face_state_vec[swif];
+
+	  next0 =
+	    hicn_face_prod_next_from_data_hdr (node, b0, &prod_face->prefix);
+	  stats.pkts_data_count++;
+
+	  /* trace */
+	  hicn_face_prod_trace_buffer (vm, node,
+				       vnet_buffer (b0)->sw_if_index[VLIB_RX],
+				       b0, next0);
+
+	  /* enqueue */
+	  vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
+					   n_left_to_next, bi0, next0);
+
+	  stats.pkts_processed += 1;
+
+	}
+
+      vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+    }
+
+  vlib_node_increment_counter (vm, node->node_index,
+			       HICNFWD_ERROR_PROCESSED, stats.pkts_processed);
+  vlib_node_increment_counter (vm, node->node_index, HICNFWD_ERROR_DATAS,
+			       stats.pkts_data_count);
+
+  return (frame->n_vectors);
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE(hicn_face_prod_input_node) =
+{
+  .function = hicn_face_prod_input_node_fn,
+  .name = "hicn-face-prod-input",
+  .vector_size = sizeof(u32),
+  .format_trace = format_face_prod_input_trace,
+  .type = VLIB_NODE_TYPE_INTERNAL,
+  .n_errors = ARRAY_LEN(face_prod_input_error_strings),
+  .error_strings = face_prod_input_error_strings,
+  .n_next_nodes = HICN_FACE_PROD_N_NEXT,
+  .next_nodes =
+  {
+    [HICN_FACE_PROD_NEXT_DATA_IP4] = "hicn4-face-input",
+    [HICN_FACE_PROD_NEXT_DATA_IP6] = "hicn6-face-input",
+    [HICN_FACE_PROD_NEXT_ERROR_DROP] = "error-drop",
+  },
+};
+/* *INDENT-ON* */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables: eval: (c-set-style "gnu") End:
+ */