GBP: fix UT after multi-arch change

Change-Id: I09c400d71b3c973341fd79fe9b6709592d96822c
Signed-off-by: Neale Ranns <nranns@cisco.com>

1 files changed, 388 insertions, 0 deletions

diff --git a/src/plugins/gbp/gbp_policy_node.c b/src/plugins/gbp/gbp_policy_node.c
new file mode 100644
index 00000000000..aaf362d2c9a
--- /dev/null
+++ b/src/plugins/gbp/gbp_policy_node.c
@@ -0,0 +1,388 @@
+/*
+ * Copyright (c) 2018 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/gbp/gbp.h>
+#include <plugins/gbp/gbp_policy_dpo.h>
+
+#include <vnet/vxlan-gbp/vxlan_gbp_packet.h>
+
+#define foreach_gbp_policy                      \
+  _(DENY,    "deny")
+
+typedef enum
+{
+#define _(sym,str) GBP_ERROR_##sym,
+  foreach_gbp_policy
+#undef _
+    GBP_POLICY_N_ERROR,
+} gbp_policy_error_t;
+
+static char *gbp_policy_error_strings[] = {
+#define _(sym,string) string,
+  foreach_gbp_policy
+#undef _
+};
+
+typedef enum
+{
+#define _(sym,str) GBP_POLICY_NEXT_##sym,
+  foreach_gbp_policy
+#undef _
+    GBP_POLICY_N_NEXT,
+} gbp_policy_next_t;
+
+/**
+ * per-packet trace data
+ */
+typedef struct gbp_policy_trace_t_
+{
+  /* per-pkt trace data */
+  u32 src_epg;
+  u32 dst_epg;
+  u32 acl_index;
+  u32 allowed;
+} gbp_policy_trace_t;
+
+always_inline dpo_proto_t
+ethertype_to_dpo_proto (u16 etype)
+{
+  etype = clib_net_to_host_u16 (etype);
+
+  switch (etype)
+    {
+    case ETHERNET_TYPE_IP4:
+      return (DPO_PROTO_IP4);
+    case ETHERNET_TYPE_IP6:
+      return (DPO_PROTO_IP6);
+    }
+
+  return (DPO_PROTO_NONE);
+}
+
+always_inline u32
+gbp_rule_l2_redirect (const gbp_rule_t * gu, vlib_buffer_t * b0)
+{
+  const ethernet_header_t *eth0;
+  const dpo_id_t *dpo;
+  dpo_proto_t dproto;
+
+  eth0 = vlib_buffer_get_current (b0);
+  /* pop the ethernet header to prepare for L3 rewrite */
+  vlib_buffer_advance (b0, vnet_buffer (b0)->l2.l2_len);
+
+  dproto = ethertype_to_dpo_proto (eth0->type);
+  dpo = &gu->gu_dpo[GBP_POLICY_NODE_L2][dproto];
+
+  /* save the LB index for the next node and reset the IP flow hash
+   * so it's recalculated */
+  vnet_buffer (b0)->ip.adj_index[VLIB_TX] = dpo->dpoi_index;
+  vnet_buffer (b0)->ip.flow_hash = 0;
+
+  return (dpo->dpoi_next_node);
+}
+
+always_inline u8
+gbp_policy_is_ethertype_allowed (const gbp_contract_t * gc0, u16 ethertype)
+{
+  u16 *et;
+
+  vec_foreach (et, gc0->gc_allowed_ethertypes)
+  {
+    if (*et == ethertype)
+      return (1);
+  }
+  return (0);
+}
+
+static uword
+gbp_policy_inline (vlib_main_t * vm,
+		   vlib_node_runtime_t * node,
+		   vlib_frame_t * frame, u8 is_port_based)
+{
+  gbp_main_t *gm = &gbp_main;
+  gbp_policy_main_t *gpm = &gbp_policy_main;
+  u32 n_left_from, *from, *to_next;
+  u32 next_index;
+
+  next_index = 0;
+  n_left_from = frame->n_vectors;
+  from = vlib_frame_vector_args (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);
+
+      while (n_left_from > 0 && n_left_to_next > 0)
+	{
+	  const ethernet_header_t *h0;
+	  const gbp_endpoint_t *ge0;
+	  const gbp_contract_t *gc0;
+	  gbp_policy_next_t next0;
+	  gbp_contract_key_t key0;
+	  u32 bi0, sw_if_index0;
+	  vlib_buffer_t *b0;
+	  index_t gci0;
+
+	  gc0 = NULL;
+	  next0 = GBP_POLICY_NEXT_DENY;
+	  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 the A0bit is set then policy has already been applied
+	   * and we skip enforcement here.
+	   */
+	  if (vnet_buffer2 (b0)->gbp.flags & VXLAN_GBP_GPFLAGS_A)
+	    {
+	      next0 = vnet_l2_feature_next (b0,
+					    gpm->l2_output_feat_next
+					    [is_port_based],
+					    (is_port_based ?
+					     L2OUTPUT_FEAT_GBP_POLICY_PORT :
+					     L2OUTPUT_FEAT_GBP_POLICY_MAC));
+	      key0.as_u32 = ~0;
+	      goto trace;
+	    }
+	  /*
+	   * determine the src and dst EPG
+	   */
+	  if (is_port_based)
+	    ge0 = gbp_endpoint_find_itf (sw_if_index0);
+	  else
+	    ge0 = gbp_endpoint_find_mac (h0->dst_address,
+					 vnet_buffer (b0)->l2.bd_index);
+
+	  if (NULL != ge0)
+	    key0.gck_dst = ge0->ge_fwd.gef_epg_id;
+	  else
+	    /* If you cannot determine the destination EP then drop */
+	    goto trace;
+
+	  key0.gck_src = vnet_buffer2 (b0)->gbp.src_epg;
+
+	  if (EPG_INVALID != key0.gck_src)
+	    {
+	      if (PREDICT_FALSE (key0.gck_src == key0.gck_dst))
+		{
+		  /*
+		   * intra-epg allowed
+		   */
+		  next0 =
+		    vnet_l2_feature_next (b0,
+					  gpm->l2_output_feat_next
+					  [is_port_based],
+					  (is_port_based ?
+					   L2OUTPUT_FEAT_GBP_POLICY_PORT :
+					   L2OUTPUT_FEAT_GBP_POLICY_MAC));
+		  vnet_buffer2 (b0)->gbp.flags |= VXLAN_GBP_GPFLAGS_A;
+		}
+	      else
+		{
+		  gci0 = gbp_contract_find (&key0);
+
+		  if (INDEX_INVALID != gci0)
+		    {
+		      u32 rule_match_p0, trace_bitmap0;
+		      fa_5tuple_opaque_t pkt_5tuple0;
+		      u32 acl_pos_p0, acl_match_p0;
+		      u8 is_ip60, l2_len0, action0;
+		      const gbp_rule_t *gu;
+		      u16 ether_type0;
+		      const u8 *h0;
+
+		      action0 = 0;
+		      gc0 = gbp_contract_get (gci0);
+		      l2_len0 = vnet_buffer (b0)->l2.l2_len;
+		      h0 = vlib_buffer_get_current (b0);
+
+		      ether_type0 = *(u16 *) (h0 + l2_len0 - 2);
+
+		      if (!gbp_policy_is_ethertype_allowed (gc0, ether_type0))
+			{
+			  /*
+			   * black list model so drop
+			   */
+			  goto trace;
+			}
+
+		      if ((ether_type0 ==
+			   clib_net_to_host_u16 (ETHERNET_TYPE_IP6))
+			  || (ether_type0 ==
+			      clib_net_to_host_u16 (ETHERNET_TYPE_IP4)))
+			{
+			  is_ip60 =
+			    (ether_type0 ==
+			     clib_net_to_host_u16 (ETHERNET_TYPE_IP6)) ? 1 :
+			    0;
+			  /*
+			   * tests against the ACL
+			   */
+			  acl_plugin_fill_5tuple_inline (gm->
+							 acl_plugin.p_acl_main,
+							 gc0->gc_lc_index, b0,
+							 is_ip60,
+							 /* is_input */ 0,
+							 /* is_l2_path */ 1,
+							 &pkt_5tuple0);
+			  acl_plugin_match_5tuple_inline (gm->
+							  acl_plugin.p_acl_main,
+							  gc0->gc_lc_index,
+							  &pkt_5tuple0,
+							  is_ip60, &action0,
+							  &acl_pos_p0,
+							  &acl_match_p0,
+							  &rule_match_p0,
+							  &trace_bitmap0);
+
+			  if (action0 > 0)
+			    {
+			      vnet_buffer2 (b0)->gbp.flags |=
+				VXLAN_GBP_GPFLAGS_A;
+			      gu =
+				gbp_rule_get (gc0->gc_rules[rule_match_p0]);
+
+			      switch (gu->gu_action)
+				{
+				case GBP_RULE_PERMIT:
+				  next0 = vnet_l2_feature_next
+				    (b0,
+				     gpm->l2_output_feat_next
+				     [is_port_based],
+				     (is_port_based ?
+				      L2OUTPUT_FEAT_GBP_POLICY_PORT :
+				      L2OUTPUT_FEAT_GBP_POLICY_MAC));
+				  break;
+				case GBP_RULE_DENY:
+				  next0 = 0;
+				  break;
+				case GBP_RULE_REDIRECT:
+				  next0 = gbp_rule_l2_redirect (gu, b0);
+				  break;
+				}
+			    }
+			}
+		    }
+		}
+	    }
+	  else
+	    {
+	      /*
+	       * the src EPG is not set when the packet arrives on an EPG
+	       * uplink interface and we do not need to apply policy
+	       */
+	      next0 =
+		vnet_l2_feature_next (b0,
+				      gpm->l2_output_feat_next[is_port_based],
+				      (is_port_based ?
+				       L2OUTPUT_FEAT_GBP_POLICY_PORT :
+				       L2OUTPUT_FEAT_GBP_POLICY_MAC));
+	    }
+
+	trace:
+	  if (PREDICT_FALSE ((b0->flags & VLIB_BUFFER_IS_TRACED)))
+	    {
+	      gbp_policy_trace_t *t =
+		vlib_add_trace (vm, node, b0, sizeof (*t));
+	      t->src_epg = key0.gck_src;
+	      t->dst_epg = key0.gck_dst;
+	      t->acl_index = (gc0 ? gc0->gc_acl_index : ~0),
+		t->allowed = (next0 != GBP_POLICY_NEXT_DENY);
+	    }
+
+	  /* 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_NODE_FN (gbp_policy_port_node) (vlib_main_t * vm,
+				     vlib_node_runtime_t * node,
+				     vlib_frame_t * frame)
+{
+  return (gbp_policy_inline (vm, node, frame, 1));
+}
+
+VLIB_NODE_FN (gbp_policy_mac_node) (vlib_main_t * vm,
+				    vlib_node_runtime_t * node,
+				    vlib_frame_t * frame)
+{
+  return (gbp_policy_inline (vm, node, frame, 0));
+}
+
+/* packet trace format function */
+static u8 *
+format_gbp_policy_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 *);
+  gbp_policy_trace_t *t = va_arg (*args, gbp_policy_trace_t *);
+
+  s =
+    format (s, "src:%d, dst:%d, acl:%d allowed:%d",
+	    t->src_epg, t->dst_epg, t->acl_index, t->allowed);
+
+  return s;
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (gbp_policy_port_node) = {
+  .name = "gbp-policy-port",
+  .vector_size = sizeof (u32),
+  .format_trace = format_gbp_policy_trace,
+  .type = VLIB_NODE_TYPE_INTERNAL,
+
+  .n_errors = ARRAY_LEN(gbp_policy_error_strings),
+  .error_strings = gbp_policy_error_strings,
+
+  .n_next_nodes = GBP_POLICY_N_NEXT,
+
+  .next_nodes = {
+    [GBP_POLICY_NEXT_DENY] = "error-drop",
+  },
+};
+
+VLIB_REGISTER_NODE (gbp_policy_mac_node) = {
+  .name = "gbp-policy-mac",
+  .vector_size = sizeof (u32),
+  .format_trace = format_gbp_policy_trace,
+  .type = VLIB_NODE_TYPE_INTERNAL,
+  .sibling_of = "gbp-policy-port",
+};
+
+/* *INDENT-ON* */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */