IP-Punt-redirect: allow the use of a FIB path to describe how to

redirect

Change-Id: I2a3ba2a3d73ea8511e3a511855b041432328f0a8
Signed-off-by: Neale Ranns <nranns@cisco.com>

7 files changed, 429 insertions, 383 deletions

diff --git a/src/vnet/ip/ip4.h b/src/vnet/ip/ip4.h
index 9f25f43b98e..0ead3faa1b8 100644
--- a/src/vnet/ip/ip4.h
+++ b/src/vnet/ip/ip4.h
@@ -302,6 +302,9 @@ void ip4_punt_policer_add_del (u8 is_add, u32 policer_index);
 
 void ip4_punt_redirect_add (u32 rx_sw_if_index,
 			    u32 tx_sw_if_index, ip46_address_t * nh);
+void ip4_punt_redirect_add_paths (u32 rx_sw_if_index,
+				  fib_route_path_t * paths);
+
 void ip4_punt_redirect_del (u32 rx_sw_if_index);
 
 /* Compute flow hash.  We'll use it to select which adjacency to use for this
diff --git a/src/vnet/ip/ip4_punt_drop.c b/src/vnet/ip/ip4_punt_drop.c
index 85409857f38..4771e8d5b34 100644
--- a/src/vnet/ip/ip4_punt_drop.c
+++ b/src/vnet/ip/ip4_punt_drop.c
@@ -33,8 +33,6 @@ VNET_FEATURE_ARC_INIT (ip4_drop) =
 /* *INDENT-ON* */
 
 extern ip_punt_policer_t ip4_punt_policer_cfg;
-extern ip_punt_redirect_t ip4_punt_redirect_cfg;
-extern ip_punt_redirect_rx_t uninit_rx_redirect;
 
 #ifndef CLIB_MARCH_VARIANT
 u8 *
@@ -89,41 +87,6 @@ VNET_FEATURE_INIT (ip4_punt_policer_node) = {
 };
 /* *INDENT-ON* */
 
-#ifndef CLIB_MARCH_VARIANT
-u8 *
-format_ip_punt_redirect_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 *);
-  ip_punt_redirect_trace_t *t = va_arg (*args, ip_punt_redirect_trace_t *);
-  vnet_main_t *vnm = vnet_get_main ();
-  vnet_sw_interface_t *si;
-
-  si = vnet_get_sw_interface_safe (vnm, t->redirect.tx_sw_if_index);
-
-  if (NULL != si)
-    s = format (s, "via %U on %U using adj:%d",
-		format_ip46_address, &t->redirect.nh, IP46_TYPE_ANY,
-		format_vnet_sw_interface_name, vnm, si,
-		t->redirect.adj_index);
-  else
-    s = format (s, "via %U on %d using adj:%d",
-		format_ip46_address, &t->redirect.nh, IP46_TYPE_ANY,
-		t->redirect.tx_sw_if_index, t->redirect.adj_index);
-
-  return s;
-}
-
-/* *INDENT-OFF* */
-ip_punt_redirect_t ip4_punt_redirect_cfg = {
-  .any_rx_sw_if_index = {
-    .tx_sw_if_index = ~0,
-	.adj_index = ADJ_INDEX_INVALID,
-  },
-};
-/* *INDENT-ON* */
-#endif /* CLIB_MARCH_VARIANT */
-
 
 #define foreach_ip4_punt_redirect_error         \
 _(DROP, "ip4 punt redirect drop")
@@ -148,7 +111,7 @@ VLIB_NODE_FN (ip4_punt_redirect_node) (vlib_main_t * vm,
 {
   return (ip_punt_redirect (vm, node, frame,
 			    vnet_feat_arc_ip4_punt.feature_arc_index,
-			    &ip4_punt_redirect_cfg));
+			    FIB_PROTOCOL_IP4));
 }
 
 /* *INDENT-OFF* */
@@ -327,72 +290,34 @@ VLIB_CLI_COMMAND (ip4_punt_policer_command, static) =
 /* *INDENT-ON* */
 
 #ifndef CLIB_MARCH_VARIANT
-/*
- * an uninitalised rx-redirect strcut used to pad the vector
- */
-ip_punt_redirect_rx_t uninit_rx_redirect = {
-  .tx_sw_if_index = ~0,
-  .adj_index = ADJ_INDEX_INVALID,
-};
 
 void
-ip_punt_redirect_add (ip_punt_redirect_t * cfg,
-		      u32 rx_sw_if_index,
-		      ip_punt_redirect_rx_t * redirect,
-		      fib_protocol_t fproto, vnet_link_t linkt)
+ip4_punt_redirect_add (u32 rx_sw_if_index,
+		       u32 tx_sw_if_index, ip46_address_t * nh)
 {
-  ip_punt_redirect_rx_t *new;
-
-  if (~0 == rx_sw_if_index)
-    {
-      cfg->any_rx_sw_if_index = *redirect;
-      new = &cfg->any_rx_sw_if_index;
-    }
-  else
-    {
-      vec_validate_init_empty (cfg->redirect_by_rx_sw_if_index,
-			       rx_sw_if_index, uninit_rx_redirect);
-      cfg->redirect_by_rx_sw_if_index[rx_sw_if_index] = *redirect;
-      new = &cfg->redirect_by_rx_sw_if_index[rx_sw_if_index];
-    }
+  /* *INDENT-OFF* */
+  fib_route_path_t *rpaths = NULL, rpath = {
+    .frp_proto = DPO_PROTO_IP4,
+    .frp_addr = *nh,
+    .frp_sw_if_index = tx_sw_if_index,
+    .frp_weight = 1,
+    .frp_fib_index = ~0,
+  };
+  /* *INDENT-ON* */
 
-  new->adj_index = adj_nbr_add_or_lock (fproto, linkt,
-					&redirect->nh,
-					redirect->tx_sw_if_index);
-}
+  vec_add1 (rpaths, rpath);
 
-void
-ip_punt_redirect_del (ip_punt_redirect_t * cfg, u32 rx_sw_if_index)
-{
-  ip_punt_redirect_rx_t *old;
+  ip4_punt_redirect_add_paths (rx_sw_if_index, rpaths);
 
-  if (~0 == rx_sw_if_index)
-    {
-      old = &cfg->any_rx_sw_if_index;
-    }
-  else
-    {
-      old = &cfg->redirect_by_rx_sw_if_index[rx_sw_if_index];
-    }
-
-  if ((old == NULL) || (old->adj_index == ADJ_INDEX_INVALID))
-    return;
-
-  adj_unlock (old->adj_index);
-  *old = uninit_rx_redirect;
+  vec_free (rpaths);
 }
 
 void
-ip4_punt_redirect_add (u32 rx_sw_if_index,
-		       u32 tx_sw_if_index, ip46_address_t * nh)
+ip4_punt_redirect_add_paths (u32 rx_sw_if_index, fib_route_path_t * rpaths)
 {
-  ip_punt_redirect_rx_t rx = {
-    .tx_sw_if_index = tx_sw_if_index,
-    .nh = *nh,
-  };
-
-  ip_punt_redirect_add (&ip4_punt_redirect_cfg,
-			rx_sw_if_index, &rx, FIB_PROTOCOL_IP4, VNET_LINK_IP4);
+  ip_punt_redirect_add (FIB_PROTOCOL_IP4,
+			rx_sw_if_index,
+			FIB_FORW_CHAIN_TYPE_UNICAST_IP4, rpaths);
 
   vnet_feature_enable_disable ("ip4-punt", "ip4-punt-redirect", 0, 1, 0, 0);
 }
@@ -402,7 +327,7 @@ ip4_punt_redirect_del (u32 rx_sw_if_index)
 {
   vnet_feature_enable_disable ("ip4-punt", "ip4-punt-redirect", 0, 0, 0, 0);
 
-  ip_punt_redirect_del (&ip4_punt_redirect_cfg, rx_sw_if_index);
+  ip_punt_redirect_del (FIB_PROTOCOL_IP4, rx_sw_if_index);
 }
 #endif /* CLIB_MARCH_VARIANT */
 
@@ -412,10 +337,9 @@ ip4_punt_redirect_cmd (vlib_main_t * vm,
 		       vlib_cli_command_t * cmd)
 {
   unformat_input_t _line_input, *line_input = &_line_input;
-  ip46_address_t nh = ip46_address_initializer;
+  fib_route_path_t *rpaths = NULL, rpath;
   clib_error_t *error = 0;
-  u32 rx_sw_if_index = 0;
-  u32 tx_sw_if_index = 0;
+  u32 rx_sw_if_index = ~0;
   vnet_main_t *vnm;
   u8 is_add;
 
@@ -436,14 +360,9 @@ ip4_punt_redirect_cmd (vlib_main_t * vm,
       else if (unformat (line_input, "rx %U",
 			 unformat_vnet_sw_interface, vnm, &rx_sw_if_index))
 	;
-      else if (unformat (line_input, "via %U %U",
-			 unformat_ip4_address,
-			 &nh.ip4,
-			 unformat_vnet_sw_interface, vnm, &tx_sw_if_index))
-	;
       else if (unformat (line_input, "via %U",
-			 unformat_vnet_sw_interface, vnm, &tx_sw_if_index))
-	clib_memset (&nh, 0, sizeof (nh));
+			 unformat_fib_route_path, &rpath))
+	vec_add1 (rpaths, rpath);
       else
 	{
 	  error = unformat_parse_error (line_input);
@@ -451,19 +370,20 @@ ip4_punt_redirect_cmd (vlib_main_t * vm,
 	}
     }
 
+  if (~0 == rx_sw_if_index)
+    {
+      error = unformat_parse_error (line_input);
+      goto done;
+    }
+
   if (is_add)
     {
-      if (rx_sw_if_index && tx_sw_if_index)
-	{
-	  ip4_punt_redirect_add (rx_sw_if_index, tx_sw_if_index, &nh);
-	}
+      if (vec_len (rpaths))
+	ip4_punt_redirect_add_paths (rx_sw_if_index, rpaths);
     }
   else
     {
-      if (rx_sw_if_index)
-	{
-	  ip4_punt_redirect_del (rx_sw_if_index);
-	}
+      ip4_punt_redirect_del (rx_sw_if_index);
     }
 
 done:
@@ -485,84 +405,12 @@ VLIB_CLI_COMMAND (ip4_punt_redirect_command, static) =
 };
 /* *INDENT-ON* */
 
-#ifndef CLIB_MARCH_VARIANT
-u8 *
-format_ip_punt_redirect (u8 * s, va_list * args)
-{
-  ip_punt_redirect_t *cfg = va_arg (*args, ip_punt_redirect_t *);
-  ip_punt_redirect_rx_t *rx;
-  u32 rx_sw_if_index;
-  vnet_main_t *vnm = vnet_get_main ();
-
-  vec_foreach_index (rx_sw_if_index, cfg->redirect_by_rx_sw_if_index)
-  {
-    rx = &cfg->redirect_by_rx_sw_if_index[rx_sw_if_index];
-    if (~0 != rx->tx_sw_if_index)
-      {
-	s = format (s, " rx %U redirect via %U %U\n",
-		    format_vnet_sw_interface_name, vnm,
-		    vnet_get_sw_interface (vnm, rx_sw_if_index),
-		    format_ip46_address, &rx->nh, IP46_TYPE_ANY,
-		    format_vnet_sw_interface_name, vnm,
-		    vnet_get_sw_interface (vnm, rx->tx_sw_if_index));
-      }
-  }
-  if (~0 != cfg->any_rx_sw_if_index.tx_sw_if_index)
-    {
-      s = format (s, " rx all redirect via %U %U\n",
-		  format_ip46_address, &cfg->any_rx_sw_if_index.nh,
-		  IP46_TYPE_ANY, format_vnet_sw_interface_name, vnm,
-		  vnet_get_sw_interface (vnm,
-					 cfg->
-					 any_rx_sw_if_index.tx_sw_if_index));
-    }
-
-  return (s);
-}
-
-ip_punt_redirect_detail_t *
-ip4_punt_redirect_entries (u32 sw_if_index)
-{
-  ip_punt_redirect_rx_t *pr;
-  ip_punt_redirect_detail_t *prs = 0;
-  u32 rx_sw_if_index;
-
-  vec_foreach_index (rx_sw_if_index,
-		     ip4_punt_redirect_cfg.redirect_by_rx_sw_if_index)
-  {
-    if (sw_if_index == ~0 || sw_if_index == rx_sw_if_index)
-      {
-	pr =
-	  &ip4_punt_redirect_cfg.redirect_by_rx_sw_if_index[rx_sw_if_index];
-	if (~0 != pr->tx_sw_if_index)
-	  {
-	    ip_punt_redirect_detail_t detail = {.rx_sw_if_index =
-		rx_sw_if_index,
-	      .punt_redirect = *pr
-	    };
-	    vec_add1 (prs, detail);
-	  }
-      }
-  }
-  if (~0 != ip4_punt_redirect_cfg.any_rx_sw_if_index.tx_sw_if_index)
-    {
-      pr = &ip4_punt_redirect_cfg.any_rx_sw_if_index;
-      ip_punt_redirect_detail_t detail = {.rx_sw_if_index = ~0,
-	.punt_redirect = *pr
-      };
-      vec_add1 (prs, detail);
-    }
-
-  return prs;
-}
-#endif /* CLIB_MARCH_VARIANT */
-
 static clib_error_t *
 ip4_punt_redirect_show_cmd (vlib_main_t * vm,
 			    unformat_input_t * main_input,
 			    vlib_cli_command_t * cmd)
 {
-  vlib_cli_output (vm, "%U", format_ip_punt_redirect, &ip4_punt_redirect_cfg);
+  vlib_cli_output (vm, "%U", format_ip_punt_redirect, FIB_PROTOCOL_IP4);
 
   return (NULL);
 }
diff --git a/src/vnet/ip/ip6.h b/src/vnet/ip/ip6.h
index b511cccbaa7..2cff713ab05 100644
--- a/src/vnet/ip/ip6.h
+++ b/src/vnet/ip/ip6.h
@@ -468,6 +468,8 @@ u32 ip6_tcp_udp_icmp_validate_checksum (vlib_main_t * vm, vlib_buffer_t * p0);
 void ip6_punt_policer_add_del (u8 is_add, u32 policer_index);
 void ip6_punt_redirect_add (u32 rx_sw_if_index,
 			    u32 tx_sw_if_index, ip46_address_t * nh);
+void ip6_punt_redirect_add_paths (u32 rx_sw_if_index,
+				  fib_route_path_t * paths);
 void ip6_punt_redirect_del (u32 rx_sw_if_index);
 
 int vnet_set_ip6_classify_intfc (vlib_main_t * vm, u32 sw_if_index,
diff --git a/src/vnet/ip/ip6_punt_drop.c b/src/vnet/ip/ip6_punt_drop.c
index d1145fbf82e..330ef55483f 100644
--- a/src/vnet/ip/ip6_punt_drop.c
+++ b/src/vnet/ip/ip6_punt_drop.c
@@ -227,16 +227,6 @@ VLIB_CLI_COMMAND (ip6_punt_policer_command, static) =
   .short_help = "ip6 punt policer [add|del] <index>",
 };
 
-extern ip_punt_redirect_t ip6_punt_redirect_cfg;
-
-#ifndef CLIB_MARCH_VARIANT
-ip_punt_redirect_t ip6_punt_redirect_cfg = {
-  .any_rx_sw_if_index = {
-    .tx_sw_if_index = ~0,
-    .adj_index = ADJ_INDEX_INVALID,
-  },
-};
-#endif /* CLIB_MARCH_VARIANT */
 /* *INDENT-ON* */
 
 #define foreach_ip6_punt_redirect_error         \
@@ -262,7 +252,7 @@ VLIB_NODE_FN (ip6_punt_redirect_node) (vlib_main_t * vm,
 {
   return (ip_punt_redirect (vm, node, frame,
 			    vnet_feat_arc_ip6_punt.feature_arc_index,
-			    &ip6_punt_redirect_cfg));
+			    FIB_PROTOCOL_IP6));
 }
 
 /* *INDENT-OFF* */
@@ -290,17 +280,33 @@ VNET_FEATURE_INIT (ip6_punt_redirect_node, static) = {
 /* *INDENT-ON* */
 
 #ifndef CLIB_MARCH_VARIANT
+
 void
 ip6_punt_redirect_add (u32 rx_sw_if_index,
 		       u32 tx_sw_if_index, ip46_address_t * nh)
 {
-  ip_punt_redirect_rx_t rx = {
-    .tx_sw_if_index = tx_sw_if_index,
-    .nh = *nh,
+  /* *INDENT-OFF* */
+  fib_route_path_t *rpaths = NULL, rpath = {
+    .frp_proto = DPO_PROTO_IP6,
+    .frp_addr = *nh,
+    .frp_sw_if_index = tx_sw_if_index,
+    .frp_weight = 1,
+    .frp_fib_index = ~0,
   };
+  /* *INDENT-ON* */
+  vec_add1 (rpaths, rpath);
 
-  ip_punt_redirect_add (&ip6_punt_redirect_cfg,
-			rx_sw_if_index, &rx, FIB_PROTOCOL_IP6, VNET_LINK_IP6);
+  ip6_punt_redirect_add_paths (rx_sw_if_index, rpaths);
+
+  vec_free (rpaths);
+}
+
+void
+ip6_punt_redirect_add_paths (u32 rx_sw_if_index, fib_route_path_t * rpaths)
+{
+  ip_punt_redirect_add (FIB_PROTOCOL_IP6,
+			rx_sw_if_index,
+			FIB_FORW_CHAIN_TYPE_UNICAST_IP6, rpaths);
 
   vnet_feature_enable_disable ("ip6-punt", "ip6-punt-redirect", 0, 1, 0, 0);
 }
@@ -310,7 +316,7 @@ ip6_punt_redirect_del (u32 rx_sw_if_index)
 {
   vnet_feature_enable_disable ("ip6-punt", "ip6-punt-redirect", 0, 0, 0, 0);
 
-  ip_punt_redirect_del (&ip6_punt_redirect_cfg, rx_sw_if_index);
+  ip_punt_redirect_del (FIB_PROTOCOL_IP6, rx_sw_if_index);
 }
 #endif /* CLIB_MARCH_VARIANT */
 
@@ -320,10 +326,9 @@ ip6_punt_redirect_cmd (vlib_main_t * vm,
 		       vlib_cli_command_t * cmd)
 {
   unformat_input_t _line_input, *line_input = &_line_input;
+  fib_route_path_t *rpaths = NULL, rpath;
   clib_error_t *error = 0;
-  u32 rx_sw_if_index = 0;
-  u32 tx_sw_if_index = 0;
-  ip46_address_t nh;
+  u32 rx_sw_if_index = ~0;
   vnet_main_t *vnm;
   u8 is_add;
 
@@ -344,14 +349,9 @@ ip6_punt_redirect_cmd (vlib_main_t * vm,
       else if (unformat (line_input, "rx %U",
 			 unformat_vnet_sw_interface, vnm, &rx_sw_if_index))
 	;
-      else if (unformat (line_input, "via %U %U",
-			 unformat_ip6_address,
-			 &nh.ip6,
-			 unformat_vnet_sw_interface, vnm, &tx_sw_if_index))
-	;
       else if (unformat (line_input, "via %U",
-			 unformat_vnet_sw_interface, vnm, &tx_sw_if_index))
-	clib_memset (&nh, 0, sizeof (nh));
+			 unformat_fib_route_path, &rpath))
+	vec_add1 (rpaths, rpath);
       else
 	{
 	  error = unformat_parse_error (line_input);
@@ -359,19 +359,20 @@ ip6_punt_redirect_cmd (vlib_main_t * vm,
 	}
     }
 
+  if (~0 == rx_sw_if_index)
+    {
+      error = unformat_parse_error (line_input);
+      goto done;
+    }
+
   if (is_add)
     {
-      if (rx_sw_if_index && tx_sw_if_index)
-	{
-	  ip6_punt_redirect_add (rx_sw_if_index, tx_sw_if_index, &nh);
-	}
+      if (vec_len (rpaths))
+	ip6_punt_redirect_add_paths (rx_sw_if_index, rpaths);
     }
   else
     {
-      if (rx_sw_if_index)
-	{
-	  ip6_punt_redirect_del (rx_sw_if_index);
-	}
+      ip6_punt_redirect_del (rx_sw_if_index);
     }
 
 done:
@@ -394,45 +395,7 @@ VLIB_CLI_COMMAND (ip6_punt_redirect_command, static) =
 /* *INDENT-ON* */
 
 #ifndef CLIB_MARCH_VARIANT
-ip_punt_redirect_detail_t *
-ip6_punt_redirect_entries (u32 sw_if_index)
-{
-  ip_punt_redirect_rx_t *pr;
-  ip_punt_redirect_detail_t *prs = 0;
-  u32 rx_sw_if_index;
-
-  vec_foreach_index (rx_sw_if_index,
-		     ip6_punt_redirect_cfg.redirect_by_rx_sw_if_index)
-  {
-    if (sw_if_index == ~0 || sw_if_index == rx_sw_if_index)
-      {
-	pr =
-	  &ip6_punt_redirect_cfg.redirect_by_rx_sw_if_index[rx_sw_if_index];
-	if (NULL != pr && ~0 != pr->tx_sw_if_index)
-	  {
-	    ip_punt_redirect_detail_t detail = {.rx_sw_if_index =
-		rx_sw_if_index,
-	      .punt_redirect = *pr
-	    };
-	    vec_add1 (prs, detail);
-	  }
-      }
-  }
-  if (~0 != ip6_punt_redirect_cfg.any_rx_sw_if_index.tx_sw_if_index)
-    {
-      pr = &ip6_punt_redirect_cfg.any_rx_sw_if_index;
-      if (NULL != pr)
-	{
-	  ip_punt_redirect_detail_t detail = {.rx_sw_if_index =
-	      rx_sw_if_index,
-	    .punt_redirect = *pr
-	  };
-	  vec_add1 (prs, detail);
-	}
-    }
 
-  return prs;
-}
 #endif /* CLIB_MARCH_VARIANT */
 
 static clib_error_t *
@@ -440,7 +403,7 @@ ip6_punt_redirect_show_cmd (vlib_main_t * vm,
 			    unformat_input_t * main_input,
 			    vlib_cli_command_t * cmd)
 {
-  vlib_cli_output (vm, "%U", format_ip_punt_redirect, &ip6_punt_redirect_cfg);
+  vlib_cli_output (vm, "%U", format_ip_punt_redirect, FIB_PROTOCOL_IP6);
 
   return (NULL);
 }
diff --git a/src/vnet/ip/ip_api.c b/src/vnet/ip/ip_api.c
index 06caf111b91..bcbcf5ac8d4 100644
--- a/src/vnet/ip/ip_api.c
+++ b/src/vnet/ip/ip_api.c
@@ -44,6 +44,7 @@
 #include <vnet/ip/ip_source_and_port_range_check.h>
 #include <vnet/fib/ip4_fib.h>
 #include <vnet/fib/ip6_fib.h>
+#include <vnet/fib/fib_path_list.h>
 #include <vnet/ip/ip6_hop_by_hop.h>
 #include <vnet/ip/ip4_reassembly.h>
 #include <vnet/ip/ip6_reassembly.h>
@@ -3358,74 +3359,76 @@ void
   REPLY_MACRO (VL_API_IP_REASSEMBLY_ENABLE_DISABLE_REPLY);
 }
 
-void
-send_ip_punt_redirect_details (vl_api_registration_t * reg,
-			       u32 context, u32 sw_if_index,
-			       ip_punt_redirect_rx_t * pr, u8 is_ipv6)
+typedef struct ip_punt_redirect_walk_ctx_t_
 {
+  vl_api_registration_t *reg;
+  u32 context;
+} ip_punt_redirect_walk_ctx_t;
+
+static walk_rc_t
+send_ip_punt_redirect_details (u32 rx_sw_if_index,
+			       const ip_punt_redirect_rx_t * ipr, void *arg)
+{
+  fib_route_path_encode_t *api_rpaths = NULL;
+  ip_punt_redirect_walk_ctx_t *ctx = arg;
   vl_api_ip_punt_redirect_details_t *mp;
 
   mp = vl_msg_api_alloc (sizeof (*mp));
   if (!mp)
-    return;
+    return (WALK_STOP);;
 
   clib_memset (mp, 0, sizeof (*mp));
   mp->_vl_msg_id = ntohs (VL_API_IP_PUNT_REDIRECT_DETAILS);
-  mp->context = context;
-  mp->punt.rx_sw_if_index = htonl (sw_if_index);
-  mp->punt.tx_sw_if_index = htonl (pr->tx_sw_if_index);
-  if (is_ipv6)
-    {
-      ip_address_encode (&pr->nh, IP46_TYPE_IP6, &mp->punt.nh);
-    }
-  else
-    {
-      ip_address_encode (&pr->nh, IP46_TYPE_IP4, &mp->punt.nh);
-    }
+  mp->context = ctx->context;
 
-  vl_api_send_msg (reg, (u8 *) mp);
+  fib_path_list_walk_w_ext (ipr->pl, NULL, fib_path_encode, &api_rpaths);
+
+  mp->punt.rx_sw_if_index = htonl (rx_sw_if_index);
+  mp->punt.tx_sw_if_index = htonl (api_rpaths[0].rpath.frp_sw_if_index);
+
+  ip_address_encode (&api_rpaths[0].rpath.frp_addr,
+		     fib_proto_to_ip46 (ipr->fproto), &mp->punt.nh);
+
+  vl_api_send_msg (ctx->reg, (u8 *) mp);
+
+  vec_free (api_rpaths);
+
+  return (WALK_CONTINUE);
 }
 
 static void
 vl_api_ip_punt_redirect_dump_t_handler (vl_api_ip_punt_redirect_dump_t * mp)
 {
   vl_api_registration_t *reg;
-  u32 sw_if_index;
-  int rv __attribute__ ((unused)) = 0;
+  fib_protocol_t fproto;
 
-  sw_if_index = ntohl (mp->sw_if_index);
   reg = vl_api_client_index_to_registration (mp->client_index);
   if (!reg)
     return;
 
-  if (~0 != sw_if_index)
-    VALIDATE_SW_IF_INDEX (mp);
+  fproto = mp->is_ipv6 ? FIB_PROTOCOL_IP6 : FIB_PROTOCOL_IP4;
 
-  ip_punt_redirect_detail_t *pr, *prs;
-  if (mp->is_ipv6)
+  ip_punt_redirect_walk_ctx_t ctx = {
+    .reg = reg,
+    .context = mp->context,
+  };
+
+  if (~0 != mp->sw_if_index)
     {
-      prs = ip6_punt_redirect_entries (sw_if_index);
-      /* *INDENT-OFF* */
-      vec_foreach (pr, prs)
-      {
-        send_ip_punt_redirect_details (reg, mp->context, pr->rx_sw_if_index, &pr->punt_redirect, 1);
-      }
-      /* *INDENT-ON* */
-      vec_free (prs);
+      u32 rx_sw_if_index;
+      index_t pri;
+
+      rx_sw_if_index = ntohl (mp->sw_if_index);
+      pri = ip_punt_redirect_find (fproto, rx_sw_if_index);
+
+      if (INDEX_INVALID == pri)
+	return;
+
+      send_ip_punt_redirect_details (rx_sw_if_index,
+				     ip_punt_redirect_get (pri), &ctx);
     }
   else
-    {
-      prs = ip4_punt_redirect_entries (sw_if_index);
-      /* *INDENT-OFF* */
-      vec_foreach (pr, prs)
-      {
-        send_ip_punt_redirect_details (reg, mp->context, pr->rx_sw_if_index, &pr->punt_redirect, 0);
-      }
-      /* *INDENT-ON* */
-      vec_free (prs);
-    }
-
-  BAD_SW_IF_INDEX_LABEL;
+    ip_punt_redirect_walk (fproto, send_ip_punt_redirect_details, &ctx);
 }
 
 #define vl_msg_name_crc_list
diff --git a/src/vnet/ip/ip_punt_drop.c b/src/vnet/ip/ip_punt_drop.c
new file mode 100644
index 00000000000..01577a472ce
--- /dev/null
+++ b/src/vnet/ip/ip_punt_drop.c
@@ -0,0 +1,251 @@
+/*
+ * 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 <vnet/ip/ip.h>
+#include <vnet/ip/ip_punt_drop.h>
+#include <vnet/policer/policer.h>
+#include <vnet/policer/police_inlines.h>
+#include <vnet/fib/fib_path_list.h>
+
+ip_punt_redirect_cfg_t ip_punt_redirect_cfg;
+
+u8 *
+format_ip_punt_redirect_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 *);
+  ip_punt_redirect_trace_t *t = va_arg (*args, ip_punt_redirect_trace_t *);
+
+  if (INDEX_INVALID == t->rrxi)
+    s = format (s, "drop");
+  else
+    s = format (s, "via redirect:%d", t->rrxi);
+
+  return s;
+}
+
+static void
+ip_punt_redirect_stack (ip_punt_redirect_rx_t * ipr)
+{
+  dpo_id_t dpo = DPO_INVALID;
+  vlib_node_t *pnode;
+
+  fib_path_list_contribute_forwarding (ipr->pl,
+				       ipr->payload_type,
+				       FIB_PATH_LIST_FWD_FLAG_COLLAPSE, &dpo);
+
+  if (FIB_PROTOCOL_IP4 == ipr->fproto)
+    pnode =
+      vlib_get_node_by_name (vlib_get_main (), (u8 *) "ip4-punt-redirect");
+  else
+    pnode =
+      vlib_get_node_by_name (vlib_get_main (), (u8 *) "ip6-punt-redirect");
+
+  dpo_stack_from_node (pnode->index, &ipr->dpo, &dpo);
+  dpo_reset (&dpo);
+}
+
+index_t
+ip_punt_redirect_find (fib_protocol_t fproto, u32 rx_sw_if_index)
+{
+  index_t *rxs;
+
+  rxs = ip_punt_redirect_cfg.redirect_by_rx_sw_if_index[fproto];
+
+  if (vec_len (rxs) <= rx_sw_if_index)
+    return (INDEX_INVALID);
+
+  return rxs[rx_sw_if_index];
+}
+
+void
+ip_punt_redirect_add (fib_protocol_t fproto,
+		      u32 rx_sw_if_index,
+		      fib_forward_chain_type_t ct, fib_route_path_t * rpaths)
+{
+  ip_punt_redirect_rx_t *ipr;
+  index_t ipri;
+
+  if (~0 == rx_sw_if_index)
+    rx_sw_if_index = 0;
+
+  vec_validate_init_empty (ip_punt_redirect_cfg.redirect_by_rx_sw_if_index
+			   [fproto], rx_sw_if_index, INDEX_INVALID);
+
+  pool_get (ip_punt_redirect_cfg.pool, ipr);
+  ipri = ipr - ip_punt_redirect_cfg.pool;
+
+  ip_punt_redirect_cfg.redirect_by_rx_sw_if_index[fproto][rx_sw_if_index] =
+    ipri;
+
+  fib_node_init (&ipr->node, FIB_NODE_TYPE_IP_PUNT_REDIRECT);
+  ipr->fproto = fproto;
+  ipr->payload_type = ct;
+
+  ipr->pl = fib_path_list_create (FIB_PATH_LIST_FLAG_NO_URPF, rpaths);
+
+  ipr->sibling = fib_path_list_child_add (ipr->pl,
+					  FIB_NODE_TYPE_IP_PUNT_REDIRECT,
+					  ipri);
+
+  ip_punt_redirect_stack (ipr);
+}
+
+void
+ip_punt_redirect_del (fib_protocol_t fproto, u32 rx_sw_if_index)
+{
+  ip_punt_redirect_rx_t *ipr;
+  index_t *rxs;
+
+  if (~0 == rx_sw_if_index)
+    rx_sw_if_index = 0;
+
+  rxs = ip_punt_redirect_cfg.redirect_by_rx_sw_if_index[fproto];
+
+  if ((vec_len (rxs) <= rx_sw_if_index) ||
+      (INDEX_INVALID == rxs[rx_sw_if_index]))
+    return;
+
+  ipr = ip_punt_redirect_get (rxs[rx_sw_if_index]);
+
+  fib_path_list_child_remove (ipr->pl, ipr->sibling);
+  dpo_reset (&ipr->dpo);
+  pool_put (ip_punt_redirect_cfg.pool, ipr);
+
+  rxs[rx_sw_if_index] = INDEX_INVALID;
+}
+
+u8 *
+format_ip_punt_redirect (u8 * s, va_list * args)
+{
+  fib_protocol_t fproto = va_arg (*args, int);
+  ip_punt_redirect_rx_t *rx;
+  index_t *rxs;
+  u32 rx_sw_if_index;
+  vnet_main_t *vnm = vnet_get_main ();
+
+  rxs = ip_punt_redirect_cfg.redirect_by_rx_sw_if_index[fproto];
+
+  vec_foreach_index (rx_sw_if_index, rxs)
+  {
+    if (INDEX_INVALID == rxs[rx_sw_if_index])
+      continue;
+
+    rx = ip_punt_redirect_get (rxs[rx_sw_if_index]);
+
+    s = format (s, " rx %U via:\n",
+		format_vnet_sw_interface_name, vnm,
+		vnet_get_sw_interface (vnm, rx_sw_if_index));
+    s = format (s, " %U", format_fib_path_list, rx->pl, 2);
+    s = format (s, " forwarding\n", format_dpo_id, &rx->dpo, 0);
+    s = format (s, "  %U\n", format_dpo_id, &rx->dpo, 0);
+  }
+
+  return (s);
+}
+
+void
+ip_punt_redirect_walk (fib_protocol_t fproto,
+		       ip_punt_redirect_walk_cb_t cb, void *ctx)
+{
+  ip_punt_redirect_rx_t *rx;
+  u32 ii, rx_sw_if_index;
+  index_t *rxs;
+
+  rxs = ip_punt_redirect_cfg.redirect_by_rx_sw_if_index[fproto];
+
+  vec_foreach_index (ii, rxs)
+  {
+    if (INDEX_INVALID == rxs[ii])
+      continue;
+
+    rx = ip_punt_redirect_get (rxs[ii]);
+
+    rx_sw_if_index = (ii == 0 ? ~0 : ii);
+    cb (rx_sw_if_index, rx, ctx);
+  }
+}
+
+static fib_node_t *
+ip_punt_redirect_get_node (fib_node_index_t index)
+{
+  ip_punt_redirect_rx_t *ipr = ip_punt_redirect_get (index);
+  return (&(ipr->node));
+}
+
+static ip_punt_redirect_rx_t *
+ip_punt_redirect_get_from_node (fib_node_t * node)
+{
+  return ((ip_punt_redirect_rx_t *) (((char *) node) -
+				     STRUCT_OFFSET_OF (ip_punt_redirect_rx_t,
+						       node)));
+}
+
+static void
+ip_punt_redirect_last_lock_gone (fib_node_t * node)
+{
+  /*
+   * the lifetime of the entry is managed by the table.
+   */
+  ASSERT (0);
+}
+
+/*
+ * A back walk has reached this BIER entry
+ */
+static fib_node_back_walk_rc_t
+ip_punt_redirect_back_walk_notify (fib_node_t * node,
+				   fib_node_back_walk_ctx_t * ctx)
+{
+  /*
+   * re-populate the ECMP tables with new choices
+   */
+  ip_punt_redirect_rx_t *ipr = ip_punt_redirect_get_from_node (node);
+
+  ip_punt_redirect_stack (ipr);
+
+  /*
+   * no need to propagate further up the graph, since there's nothing there
+   */
+  return (FIB_NODE_BACK_WALK_CONTINUE);
+}
+
+/*
+ * The BIER fmask's graph node virtual function table
+ */
+static const fib_node_vft_t ip_punt_redirect_vft = {
+  .fnv_get = ip_punt_redirect_get_node,
+  .fnv_last_lock = ip_punt_redirect_last_lock_gone,
+  .fnv_back_walk = ip_punt_redirect_back_walk_notify,
+};
+
+static clib_error_t *
+ip_punt_drop_init (vlib_main_t * vm)
+{
+  fib_node_register_type (FIB_NODE_TYPE_IP_PUNT_REDIRECT,
+			  &ip_punt_redirect_vft);
+
+  return (NULL);
+}
+
+VLIB_INIT_FUNCTION (ip_punt_drop_init);
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
diff --git a/src/vnet/ip/ip_punt_drop.h b/src/vnet/ip/ip_punt_drop.h
index ccf88e593cf..3e2796ee868 100644
--- a/src/vnet/ip/ip_punt_drop.h
+++ b/src/vnet/ip/ip_punt_drop.h
@@ -194,19 +194,19 @@ ip_punt_policer (vlib_main_t * vm,
 typedef struct ip_punt_redirect_rx_t_
 {
   /**
-   * The next-hop to send redirected packets to
+   * Node linkage into the FIB graph
    */
-  ip46_address_t nh;
+  fib_node_t node;
 
-  /**
-   * the TX interface to send redirected packets
-   */
-  u32 tx_sw_if_index;
+  fib_protocol_t fproto;
+  fib_forward_chain_type_t payload_type;
+  fib_node_index_t pl;
+  u32 sibling;
 
   /**
-   * redirect forwarding adjacency
+   * redirect forwarding
    */
-  adj_index_t adj_index;
+  dpo_id_t dpo;
 } ip_punt_redirect_rx_t;
 
 /**
@@ -214,16 +214,17 @@ typedef struct ip_punt_redirect_rx_t_
  */
 typedef struct ip_punt_redirect_t_
 {
-    /**
-     * any RX interface redirect
-     */
-  ip_punt_redirect_rx_t any_rx_sw_if_index;
+  ip_punt_redirect_rx_t *pool;
+
+  /**
+   * per-RX interface configuration.
+   *  sw_if_index = 0 (from which packets are never received) is used to
+   *  indicate 'from-any'
+   */
+  index_t *redirect_by_rx_sw_if_index[FIB_PROTOCOL_IP_MAX];
+} ip_punt_redirect_cfg_t;
 
-    /**
-    * per-RX interface configuration
-    */
-  ip_punt_redirect_rx_t *redirect_by_rx_sw_if_index;
-} ip_punt_redirect_t;
+extern ip_punt_redirect_cfg_t ip_punt_redirect_cfg;
 
 /**
  * IP punt redirect next nodes
@@ -241,75 +242,51 @@ typedef enum ip_punt_redirect_next_t_
  */
 typedef struct ip4_punt_redirect_trace_t_
 {
-  ip_punt_redirect_rx_t redirect;
+  index_t rrxi;
   u32 next;
 } ip_punt_redirect_trace_t;
 
-typedef struct ip_punt_redirect_detail_t_
-{
-  /**
-   * the RX interface
-   */
-  u32 rx_sw_if_index;
-  /**
-   * IP punt redirect configuration
-   */
-  ip_punt_redirect_rx_t punt_redirect;
-} ip_punt_redirect_detail_t;
-
 /**
  * Add a punt redirect entry
  */
-extern void ip_punt_redirect_add (ip_punt_redirect_t * cfg,
+extern void ip_punt_redirect_add (fib_protocol_t fproto,
 				  u32 rx_sw_if_index,
-				  ip_punt_redirect_rx_t * redirect,
-				  fib_protocol_t fproto, vnet_link_t linkt);
-extern void ip_punt_redirect_del (ip_punt_redirect_t * cfg,
-				  u32 rx_sw_if_index);
+				  fib_forward_chain_type_t ct,
+				  fib_route_path_t * rpaths);
+
+extern void ip_punt_redirect_del (fib_protocol_t fproto, u32 rx_sw_if_index);
+extern index_t ip_punt_redirect_find (fib_protocol_t fproto,
+				      u32 rx_sw_if_index);
 extern u8 *format_ip_punt_redirect (u8 * s, va_list * args);
 
 extern u8 *format_ip_punt_redirect_trace (u8 * s, va_list * args);
 
-extern ip_punt_redirect_detail_t *ip4_punt_redirect_entries (u32 sw_if_index);
-extern ip_punt_redirect_detail_t *ip6_punt_redirect_entries (u32 sw_if_index);
+typedef walk_rc_t (*ip_punt_redirect_walk_cb_t) (u32 rx_sw_if_index,
+						 const ip_punt_redirect_rx_t *
+						 redirect, void *arg);
+extern void ip_punt_redirect_walk (fib_protocol_t fproto,
+				   ip_punt_redirect_walk_cb_t cb, void *ctx);
 
-always_inline u32
-ip_punt_redirect_tx_via_adj (vlib_buffer_t * b0, adj_index_t ai)
+static_always_inline ip_punt_redirect_rx_t *
+ip_punt_redirect_get (index_t rrxi)
 {
-  ip_adjacency_t *adj = adj_get (ai);
-  u32 next0;
-
-  vnet_buffer (b0)->ip.adj_index[VLIB_TX] = ai;
-
-  switch (adj->lookup_next_index)
-    {
-    case IP_LOOKUP_NEXT_ARP:
-      next0 = IP_PUNT_REDIRECT_NEXT_ARP;
-      break;
-    case IP_LOOKUP_NEXT_REWRITE:
-      next0 = IP_PUNT_REDIRECT_NEXT_TX;
-      break;
-    default:
-      next0 = IP_PUNT_REDIRECT_NEXT_DROP;
-      break;
-    }
-
-  return (next0);
+  return (pool_elt_at_index (ip_punt_redirect_cfg.pool, rrxi));
 }
 
 always_inline uword
 ip_punt_redirect (vlib_main_t * vm,
 		  vlib_node_runtime_t * node,
-		  vlib_frame_t * frame,
-		  u8 arc_index, ip_punt_redirect_t * redirect)
+		  vlib_frame_t * frame, u8 arc_index, fib_protocol_t fproto)
 {
   u32 *from, *to_next, n_left_from, n_left_to_next, next_index;
   vnet_feature_main_t *fm = &feature_main;
   vnet_feature_config_main_t *cm = &fm->feature_config_mains[arc_index];
+  index_t *redirects;
 
   from = vlib_frame_vector_args (frame);
   n_left_from = frame->n_vectors;
   next_index = node->cached_next_index;
+  redirects = ip_punt_redirect_cfg.redirect_by_rx_sw_if_index[fproto];
 
   while (n_left_from > 0)
     {
@@ -317,13 +294,13 @@ ip_punt_redirect (vlib_main_t * vm,
 
       while (n_left_from > 0 && n_left_to_next > 0)
 	{
-	  u32 rx_sw_if_index0;
+	  u32 rx_sw_if_index0, rrxi0;
 	  ip_punt_redirect_rx_t *rrx0;
 	  vlib_buffer_t *b0;
 	  u32 next0;
 	  u32 bi0;
 
-	  rrx0 = NULL;
+	  rrxi0 = INDEX_INVALID;
 	  next0 = 0;
 	  bi0 = to_next[0] = from[0];
 
@@ -339,24 +316,24 @@ ip_punt_redirect (vlib_main_t * vm,
 
 	  rx_sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
 
-	  if (vec_len (redirect->redirect_by_rx_sw_if_index) >
-	      rx_sw_if_index0)
+	  /*
+	   * If config exists for this particular RX interface use it,
+	   * else use the default (at RX = 0)
+	   */
+	  if (vec_len (redirects) > rx_sw_if_index0)
 	    {
-	      rrx0 = &redirect->redirect_by_rx_sw_if_index[rx_sw_if_index0];
-	      if (~0 != rrx0->tx_sw_if_index)
-		{
-		  next0 = ip_punt_redirect_tx_via_adj (b0, rrx0->adj_index);
-		}
-	      else if (~0 != redirect->any_rx_sw_if_index.tx_sw_if_index)
-		{
-		  rrx0 = &redirect->any_rx_sw_if_index;
-		  next0 = ip_punt_redirect_tx_via_adj (b0, rrx0->adj_index);
-		}
+	      rrxi0 = redirects[rx_sw_if_index0];
+	      if (INDEX_INVALID == rrxi0)
+		rrxi0 = redirects[0];
 	    }
-	  else if (~0 != redirect->any_rx_sw_if_index.tx_sw_if_index)
+	  else if (vec_len (redirects) >= 1)
+	    rrxi0 = redirects[0];
+
+	  if (PREDICT_TRUE (INDEX_INVALID != rrxi0))
 	    {
-	      rrx0 = &redirect->any_rx_sw_if_index;
-	      next0 = ip_punt_redirect_tx_via_adj (b0, rrx0->adj_index);
+	      rrx0 = ip_punt_redirect_get (rrxi0);
+	      vnet_buffer (b0)->ip.adj_index[VLIB_TX] = rrx0->dpo.dpoi_index;
+	      next0 = rrx0->dpo.dpoi_next_node;
 	    }
 
 	  if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
@@ -364,8 +341,7 @@ ip_punt_redirect (vlib_main_t * vm,
 	      ip_punt_redirect_trace_t *t =
 		vlib_add_trace (vm, node, b0, sizeof (*t));
 	      t->next = next0;
-	      if (rrx0)
-		t->redirect = *rrx0;
+	      t->rrxi = rrxi0;
 	    }
 
 	  vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,