GRE: API update

Change-Id: I5010cd34123c6498230dedac6ba8dd774a1085f9
Signed-off-by: Neale Ranns <nranns@cisco.com>

11 files changed, 258 insertions, 285 deletions

diff --git a/src/vat/api_format.c b/src/vat/api_format.c
index 0e2fec32218..bff81567c6c 100644
--- a/src/vat/api_format.c
+++ b/src/vat/api_format.c
@@ -2466,8 +2466,8 @@ static void vl_api_vxlan_gpe_add_del_tunnel_reply_t_handler_json
   vam->result_ready = 1;
 }
 
-static void vl_api_gre_add_del_tunnel_reply_t_handler
-  (vl_api_gre_add_del_tunnel_reply_t * mp)
+static void vl_api_gre_tunnel_add_del_reply_t_handler
+  (vl_api_gre_tunnel_add_del_reply_t * mp)
 {
   vat_main_t *vam = &vat_main;
   i32 retval = ntohl (mp->retval);
@@ -2483,8 +2483,8 @@ static void vl_api_gre_add_del_tunnel_reply_t_handler
     }
 }
 
-static void vl_api_gre_add_del_tunnel_reply_t_handler_json
-  (vl_api_gre_add_del_tunnel_reply_t * mp)
+static void vl_api_gre_tunnel_add_del_reply_t_handler_json
+  (vl_api_gre_tunnel_add_del_reply_t * mp)
 {
   vat_main_t *vam = &vat_main;
   vat_json_node_t node;
@@ -5413,7 +5413,7 @@ _(VXLAN_OFFLOAD_RX_REPLY, vxlan_offload_rx_reply)               \
 _(GENEVE_ADD_DEL_TUNNEL_REPLY, geneve_add_del_tunnel_reply)             \
 _(VXLAN_TUNNEL_DETAILS, vxlan_tunnel_details)                           \
 _(GENEVE_TUNNEL_DETAILS, geneve_tunnel_details)                         \
-_(GRE_ADD_DEL_TUNNEL_REPLY, gre_add_del_tunnel_reply)                   \
+_(GRE_TUNNEL_ADD_DEL_REPLY, gre_tunnel_add_del_reply)                   \
 _(GRE_TUNNEL_DETAILS, gre_tunnel_details)                               \
 _(L2_FIB_CLEAR_TABLE_REPLY, l2_fib_clear_table_reply)                   \
 _(L2_INTERFACE_EFP_FILTER_REPLY, l2_interface_efp_filter_reply)         \
@@ -13292,16 +13292,17 @@ api_geneve_tunnel_dump (vat_main_t * vam)
 }
 
 static int
-api_gre_add_del_tunnel (vat_main_t * vam)
+api_gre_tunnel_add_del (vat_main_t * vam)
 {
   unformat_input_t *line_input = vam->input;
-  vl_api_gre_add_del_tunnel_t *mp;
-  ip4_address_t src4, dst4;
-  ip6_address_t src6, dst6;
+  vl_api_address_t src = { }, dst =
+  {
+  };
+  vl_api_gre_tunnel_add_del_t *mp;
+  vl_api_gre_tunnel_type_t t_type;
   u8 is_add = 1;
   u8 ipv4_set = 0;
   u8 ipv6_set = 0;
-  u8 t_type = GRE_TUNNEL_TYPE_L3;
   u8 src_set = 0;
   u8 dst_set = 0;
   u32 outer_fib_id = 0;
@@ -13309,10 +13310,7 @@ api_gre_add_del_tunnel (vat_main_t * vam)
   u32 instance = ~0;
   int ret;
 
-  clib_memset (&src4, 0, sizeof src4);
-  clib_memset (&dst4, 0, sizeof dst4);
-  clib_memset (&src6, 0, sizeof src6);
-  clib_memset (&dst6, 0, sizeof dst6);
+  t_type = GRE_API_TUNNEL_TYPE_L3;
 
   while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
     {
@@ -13320,32 +13318,20 @@ api_gre_add_del_tunnel (vat_main_t * vam)
 	is_add = 0;
       else if (unformat (line_input, "instance %d", &instance))
 	;
-      else if (unformat (line_input, "src %U", unformat_ip4_address, &src4))
-	{
-	  src_set = 1;
-	  ipv4_set = 1;
-	}
-      else if (unformat (line_input, "dst %U", unformat_ip4_address, &dst4))
-	{
-	  dst_set = 1;
-	  ipv4_set = 1;
-	}
-      else if (unformat (line_input, "src %U", unformat_ip6_address, &src6))
+      else if (unformat (line_input, "src %U", unformat_vl_api_address, &src))
 	{
 	  src_set = 1;
-	  ipv6_set = 1;
 	}
-      else if (unformat (line_input, "dst %U", unformat_ip6_address, &dst6))
+      else if (unformat (line_input, "dst %U", unformat_vl_api_address, &dst))
 	{
 	  dst_set = 1;
-	  ipv6_set = 1;
 	}
       else if (unformat (line_input, "outer-fib-id %d", &outer_fib_id))
 	;
       else if (unformat (line_input, "teb"))
-	t_type = GRE_TUNNEL_TYPE_TEB;
+	t_type = GRE_API_TUNNEL_TYPE_TEB;
       else if (unformat (line_input, "erspan %d", &session_id))
-	t_type = GRE_TUNNEL_TYPE_ERSPAN;
+	t_type = GRE_API_TUNNEL_TYPE_ERSPAN;
       else
 	{
 	  errmsg ("parse error '%U'", format_unformat_error, line_input);
@@ -13363,31 +13349,17 @@ api_gre_add_del_tunnel (vat_main_t * vam)
       errmsg ("tunnel dst address not specified");
       return -99;
     }
-  if (ipv4_set && ipv6_set)
-    {
-      errmsg ("both IPv4 and IPv6 addresses specified");
-      return -99;
-    }
 
+  M (GRE_TUNNEL_ADD_DEL, mp);
 
-  M (GRE_ADD_DEL_TUNNEL, mp);
+  clib_memcpy (&mp->tunnel.src, &src, sizeof (mp->tunnel.src));
+  clib_memcpy (&mp->tunnel.dst, &dst, sizeof (mp->tunnel.dst));
 
-  if (ipv4_set)
-    {
-      clib_memcpy (&mp->src_address, &src4, 4);
-      clib_memcpy (&mp->dst_address, &dst4, 4);
-    }
-  else
-    {
-      clib_memcpy (&mp->src_address, &src6, 16);
-      clib_memcpy (&mp->dst_address, &dst6, 16);
-    }
-  mp->instance = htonl (instance);
-  mp->outer_fib_id = htonl (outer_fib_id);
+  mp->tunnel.instance = htonl (instance);
+  mp->tunnel.outer_fib_id = htonl (outer_fib_id);
   mp->is_add = is_add;
-  mp->session_id = htons ((u16) session_id);
-  mp->tunnel_type = t_type;
-  mp->is_ipv6 = ipv6_set;
+  mp->tunnel.session_id = htons ((u16) session_id);
+  mp->tunnel.type = htonl (t_type);
 
   S (mp);
   W (ret);
@@ -13398,15 +13370,34 @@ static void vl_api_gre_tunnel_details_t_handler
   (vl_api_gre_tunnel_details_t * mp)
 {
   vat_main_t *vam = &vat_main;
-  ip46_address_t src = to_ip46 (mp->is_ipv6, mp->src_address);
-  ip46_address_t dst = to_ip46 (mp->is_ipv6, mp->dst_address);
 
   print (vam->ofp, "%11d%11d%24U%24U%13d%14d%12d",
-	 ntohl (mp->sw_if_index),
-	 ntohl (mp->instance),
-	 format_ip46_address, &src, IP46_TYPE_ANY,
-	 format_ip46_address, &dst, IP46_TYPE_ANY,
-	 mp->tunnel_type, ntohl (mp->outer_fib_id), ntohl (mp->session_id));
+	 ntohl (mp->tunnel.sw_if_index),
+	 ntohl (mp->tunnel.instance),
+	 format_vl_api_address, &mp->tunnel.src,
+	 format_vl_api_address, &mp->tunnel.dst,
+	 mp->tunnel.type, ntohl (mp->tunnel.outer_fib_id),
+	 ntohl (mp->tunnel.session_id));
+}
+
+static void
+vat_json_object_add_address (vat_json_node_t * node,
+			     const char *str, const vl_api_address_t * addr)
+{
+  if (ADDRESS_IP6 == addr->af)
+    {
+      struct in6_addr ip6;
+
+      clib_memcpy (&ip6, &addr->un.ip6, sizeof (ip6));
+      vat_json_object_add_ip6 (node, str, ip6);
+    }
+  else
+    {
+      struct in_addr ip4;
+
+      clib_memcpy (&ip4, &addr->un.ip4, sizeof (ip4));
+      vat_json_object_add_ip4 (node, str, ip4);
+    }
 }
 
 static void vl_api_gre_tunnel_details_t_handler_json
@@ -13425,26 +13416,16 @@ static void vl_api_gre_tunnel_details_t_handler_json
   node = vat_json_array_add (&vam->json_tree);
 
   vat_json_init_object (node);
-  vat_json_object_add_uint (node, "sw_if_index", ntohl (mp->sw_if_index));
-  vat_json_object_add_uint (node, "instance", ntohl (mp->instance));
-  if (!mp->is_ipv6)
-    {
-      clib_memcpy (&ip4, &mp->src_address, sizeof (ip4));
-      vat_json_object_add_ip4 (node, "src_address", ip4);
-      clib_memcpy (&ip4, &mp->dst_address, sizeof (ip4));
-      vat_json_object_add_ip4 (node, "dst_address", ip4);
-    }
-  else
-    {
-      clib_memcpy (&ip6, &mp->src_address, sizeof (ip6));
-      vat_json_object_add_ip6 (node, "src_address", ip6);
-      clib_memcpy (&ip6, &mp->dst_address, sizeof (ip6));
-      vat_json_object_add_ip6 (node, "dst_address", ip6);
-    }
-  vat_json_object_add_uint (node, "tunnel_type", mp->tunnel_type);
-  vat_json_object_add_uint (node, "outer_fib_id", ntohl (mp->outer_fib_id));
-  vat_json_object_add_uint (node, "is_ipv6", mp->is_ipv6);
-  vat_json_object_add_uint (node, "session_id", mp->session_id);
+  vat_json_object_add_uint (node, "sw_if_index",
+			    ntohl (mp->tunnel.sw_if_index));
+  vat_json_object_add_uint (node, "instance", ntohl (mp->tunnel.instance));
+
+  vat_json_object_add_address (node, "src", &mp->tunnel.src);
+  vat_json_object_add_address (node, "dst", &mp->tunnel.dst);
+  vat_json_object_add_uint (node, "tunnel_type", mp->tunnel.type);
+  vat_json_object_add_uint (node, "outer_fib_id",
+			    ntohl (mp->tunnel.outer_fib_id));
+  vat_json_object_add_uint (node, "session_id", mp->tunnel.session_id);
 }
 
 static int
@@ -15267,26 +15248,6 @@ vl_api_ipsec_sa_details_t_handler (vl_api_ipsec_sa_details_t * mp)
 #define vl_api_ipsec_sa_details_t_endian vl_noop_handler
 #define vl_api_ipsec_sa_details_t_print vl_noop_handler
 
-static void
-vat_json_object_add_address (vat_json_node_t * node,
-			     const vl_api_address_t * addr)
-{
-  if (ADDRESS_IP6 == addr->af)
-    {
-      struct in6_addr ip6;
-
-      clib_memcpy (&ip6, &addr->un.ip6, sizeof (ip6));
-      vat_json_object_add_ip6 (node, "ip_address", ip6);
-    }
-  else
-    {
-      struct in_addr ip4;
-
-      clib_memcpy (&ip4, &addr->un.ip4, sizeof (ip4));
-      vat_json_object_add_ip4 (node, "ip_address", ip4);
-    }
-}
-
 static void vl_api_ipsec_sa_details_t_handler_json
   (vl_api_ipsec_sa_details_t * mp)
 {
@@ -15325,8 +15286,8 @@ static void vl_api_ipsec_sa_details_t_handler_json
 			     mp->entry.crypto_key.length);
   vat_json_object_add_bytes (node, "integ_key", mp->entry.integrity_key.data,
 			     mp->entry.integrity_key.length);
-  vat_json_object_add_address (node, &mp->entry.tunnel_src);
-  vat_json_object_add_address (node, &mp->entry.tunnel_dst);
+  vat_json_object_add_address (node, "src", &mp->entry.tunnel_src);
+  vat_json_object_add_address (node, "dst", &mp->entry.tunnel_dst);
   vat_json_object_add_uint (node, "replay_window",
 			    clib_net_to_host_u64 (mp->replay_window));
 }
@@ -19506,7 +19467,7 @@ static void vl_api_ip_neighbor_details_t_handler_json
   vat_json_object_add_string_copy (node, "link_layer",
 				   format (0, "%U", format_vl_api_mac_address,
 					   &mp->neighbor.mac_address));
-  vat_json_object_add_address (node, &mp->neighbor.ip_address);
+  vat_json_object_add_address (node, "ip", &mp->neighbor.ip_address);
 }
 
 static int
@@ -22519,7 +22480,7 @@ _(geneve_add_del_tunnel,                                                \
   "vni <vni> [encap-vrf-id <nn>] [decap-next <l2|nn>] [del]")           \
 _(vxlan_tunnel_dump, "[<intfc> | sw_if_index <nn>]")                    \
 _(geneve_tunnel_dump, "[<intfc> | sw_if_index <nn>]")                   \
-_(gre_add_del_tunnel,                                                   \
+_(gre_tunnel_add_del,                                                   \
   "src <ip-addr> dst <ip-addr> [outer-fib-id <nn>] [instance <n>]\n"    \
   "[teb | erspan <session-id>] [del]")                                	\
 _(gre_tunnel_dump, "[<intfc> | sw_if_index <nn>]")                      \
diff --git a/src/vnet/gre/gre.api b/src/vnet/gre/gre.api
index 28c970154ae..17552cf344d 100644
--- a/src/vnet/gre/gre.api
+++ b/src/vnet/gre/gre.api
@@ -1,5 +1,6 @@
+/* Hey Emacs use -*- mode: C -*- */
 /*
- * Copyright (c) 2015-2016 Cisco and/or its affiliates.
+ * Copyright (c) 2015-2019 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:
@@ -13,35 +14,54 @@
  * limitations under the License.
  */
 
-option version = "1.0.1";
+option version = "2.0.0";
 
-/** \brief Create or delete a GRE tunnel
+import "vnet/ip/ip_types.api";
+
+/** \brief A GRE tunnel type
+*/
+enum gre_tunnel_type
+{
+  GRE_API_TUNNEL_TYPE_L3,
+  GRE_API_TUNNEL_TYPE_TEB,
+  GRE_API_TUNNEL_TYPE_ERSPAN,
+};
+
+/** \brief A GRE tunnel
     @param client_index - opaque cookie to identify the sender
     @param context - sender context, to match reply w/ request
-    @param is_add - Use 1 to create the tunnel, 0 to remove it
-    @param is_ipv6 - Use 0 for IPv4, 1 for IPv6
     @param tunnel_type - 0: L3, 1: TEB, 2: ERSPAN
     @param instance - optional unique custom device instance, else ~0.
-    @param src_address - Source IP address
-    @param dst_address - Destination IP address, can be multicast
+    @param src - Source IP address
+    @param dst - Destination IP address, can be multicast
     @param outer_fib_id - Encap FIB table ID
     @param session_id - session for ERSPAN tunnel, range 0-1023
+    @param sw_if_index - ignored on create/delete, present in details.
 */
-define gre_add_del_tunnel
+typedef gre_tunnel
 {
   u32 client_index;
   u32 context;
   u8 is_add;
   u8 is_ipv6;
-  u8 tunnel_type;
-  u32 instance;		/* If non-~0, specifies a custom dev instance */
-  u8 src_address[16];
-  u8 dst_address[16];
-  u32 outer_fib_id;
   u16 session_id;
+  vl_api_gre_tunnel_type_t type;
+  u32 instance;
+  u32 outer_fib_id;
+  u32 sw_if_index;
+  vl_api_address_t src;
+  vl_api_address_t dst;
+};
+
+define gre_tunnel_add_del
+{
+  u32 client_index;
+  u32 context;
+  u8 is_add;
+  vl_api_gre_tunnel_t tunnel;
 };
 
-define gre_add_del_tunnel_reply
+define gre_tunnel_add_del_reply
 {
   u32 context;
   i32 retval;
@@ -58,14 +78,7 @@ define gre_tunnel_dump
 define gre_tunnel_details
 {
   u32 context;
-  u32 sw_if_index;
-  u32 instance;
-  u8 is_ipv6;
-  u8 tunnel_type;
-  u8 src_address[16];
-  u8 dst_address[16];
-  u32 outer_fib_id;
-  u16 session_id;
+  vl_api_gre_tunnel_t tunnel;
 };
 
 /*
diff --git a/src/vnet/gre/gre.h b/src/vnet/gre/gre.h
index a1a03dfb535..99fe4ace5b4 100644
--- a/src/vnet/gre/gre.h
+++ b/src/vnet/gre/gre.h
@@ -55,10 +55,10 @@ typedef enum gre_tunnel_type_t_
    * receiving ERSPAN packets from a GRE ERSPAN tunnel in VPP.
    */
   GRE_TUNNEL_TYPE_ERSPAN = 2,
-
-  GRE_TUNNEL_TYPE_N
 } gre_tunnel_type_t;
 
+#define GRE_TUNNEL_TYPE_N (GRE_TUNNEL_TYPE_ERSPAN + 1)
+
 #define GRE_TUNNEL_TYPE_NAMES {    \
     [GRE_TUNNEL_TYPE_L3] = "L3",   \
     [GRE_TUNNEL_TYPE_TEB] = "TEB", \
@@ -347,16 +347,16 @@ gre_register_input_protocol (vlib_main_t * vm, gre_protocol_t protocol,
 typedef struct
 {
   u8 is_add;
-  u8 tunnel_type;
+  gre_tunnel_type_t type;
   u8 is_ipv6;
   u32 instance;
   ip46_address_t src, dst;
   u32 outer_fib_id;
   u16 session_id;
-} vnet_gre_add_del_tunnel_args_t;
+} vnet_gre_tunnel_add_del_args_t;
 
-int vnet_gre_add_del_tunnel
-  (vnet_gre_add_del_tunnel_args_t * a, u32 * sw_if_indexp);
+extern int vnet_gre_tunnel_add_del (vnet_gre_tunnel_add_del_args_t * a,
+				    u32 * sw_if_indexp);
 
 static inline void
 gre_mk_key4 (ip4_address_t src,
diff --git a/src/vnet/gre/gre_api.c b/src/vnet/gre/gre_api.c
index 0de6a9ff464..0d6c33bfda6 100644
--- a/src/vnet/gre/gre_api.c
+++ b/src/vnet/gre/gre_api.c
@@ -25,6 +25,7 @@
 
 #include <vnet/gre/gre.h>
 #include <vnet/fib/fib_table.h>
+#include <vnet/ip/ip_types_api.h>
 
 #include <vnet/vnet_msg_enum.h>
 
@@ -45,50 +46,93 @@
 #include <vlibapi/api_helper_macros.h>
 
 #define foreach_vpe_api_msg                             \
-_(GRE_ADD_DEL_TUNNEL, gre_add_del_tunnel)               \
+_(GRE_TUNNEL_ADD_DEL, gre_tunnel_add_del)               \
 _(GRE_TUNNEL_DUMP, gre_tunnel_dump)
 
-static void vl_api_gre_add_del_tunnel_t_handler
-  (vl_api_gre_add_del_tunnel_t * mp)
+static int
+gre_tunnel_type_decode (vl_api_gre_tunnel_type_t in, gre_tunnel_type_t * out)
 {
-  vl_api_gre_add_del_tunnel_reply_t *rmp;
-  int rv = 0;
-  vnet_gre_add_del_tunnel_args_t _a, *a = &_a;
-  u32 sw_if_index = ~0;
+  in = clib_net_to_host_u32 (in);
 
-  /* Check src & dst are different */
-  if ((mp->is_ipv6 && memcmp (mp->src_address, mp->dst_address, 16) == 0) ||
-      (!mp->is_ipv6 && memcmp (mp->src_address, mp->dst_address, 4) == 0))
+  switch (in)
     {
-      rv = VNET_API_ERROR_SAME_SRC_DST;
-      goto out;
+    case GRE_API_TUNNEL_TYPE_L3:
+      *out = GRE_TUNNEL_TYPE_L3;
+      return (0);
+    case GRE_API_TUNNEL_TYPE_TEB:
+      *out = GRE_TUNNEL_TYPE_TEB;
+      return (0);
+    case GRE_API_TUNNEL_TYPE_ERSPAN:
+      *out = GRE_TUNNEL_TYPE_ERSPAN;
+      return (0);
     }
-  clib_memset (a, 0, sizeof (*a));
 
-  a->is_add = mp->is_add;
-  a->tunnel_type = mp->tunnel_type;
-  a->is_ipv6 = mp->is_ipv6;
-  a->instance = ntohl (mp->instance);
-  a->session_id = ntohs (mp->session_id);
+  return (VNET_API_ERROR_INVALID_VALUE);
+}
+
+static vl_api_gre_tunnel_type_t
+gre_tunnel_type_encode (gre_tunnel_type_t in)
+{
+  vl_api_gre_tunnel_type_t out = GRE_API_TUNNEL_TYPE_L3;
 
-  /* ip addresses sent in network byte order */
-  if (!mp->is_ipv6)
+  switch (in)
     {
-      clib_memcpy (&(a->src.ip4), mp->src_address, 4);
-      clib_memcpy (&(a->dst.ip4), mp->dst_address, 4);
+    case GRE_TUNNEL_TYPE_L3:
+      out = GRE_API_TUNNEL_TYPE_L3;
+      break;
+    case GRE_TUNNEL_TYPE_TEB:
+      out = GRE_API_TUNNEL_TYPE_TEB;
+      break;
+    case GRE_TUNNEL_TYPE_ERSPAN:
+      out = GRE_API_TUNNEL_TYPE_ERSPAN;
+      break;
     }
-  else
+
+  out = clib_net_to_host_u32 (out);
+
+  return (out);
+}
+
+static void vl_api_gre_tunnel_add_del_t_handler
+  (vl_api_gre_tunnel_add_del_t * mp)
+{
+  vnet_gre_tunnel_add_del_args_t _a = { }, *a = &_a;
+  vl_api_gre_tunnel_add_del_reply_t *rmp;
+  u32 sw_if_index = ~0;
+  ip46_type_t itype[2];
+  int rv = 0;
+
+  itype[0] = ip_address_decode (&mp->tunnel.src, &a->src);
+  itype[1] = ip_address_decode (&mp->tunnel.dst, &a->dst);
+
+  if (itype[0] != itype[1])
     {
-      clib_memcpy (&(a->src.ip6), mp->src_address, 16);
-      clib_memcpy (&(a->dst.ip6), mp->dst_address, 16);
+      rv = VNET_API_ERROR_INVALID_PROTOCOL;
+      goto out;
     }
 
-  a->outer_fib_id = ntohl (mp->outer_fib_id);
-  rv = vnet_gre_add_del_tunnel (a, &sw_if_index);
+  if (ip46_address_is_equal (&a->src, &a->dst))
+    {
+      rv = VNET_API_ERROR_SAME_SRC_DST;
+      goto out;
+    }
+
+  rv = gre_tunnel_type_decode (mp->tunnel.type, &a->type);
+
+  if (rv)
+    goto out;
+
+  a->is_add = mp->is_add;
+  a->is_ipv6 = (itype[0] == IP46_TYPE_IP6);
+  a->instance = ntohl (mp->tunnel.instance);
+  a->session_id = ntohs (mp->tunnel.session_id);
+  a->outer_fib_id = ntohl (mp->tunnel.outer_fib_id);
+
+  rv = vnet_gre_tunnel_add_del (a, &sw_if_index);
 
 out:
   /* *INDENT-OFF* */
-  REPLY_MACRO2(VL_API_GRE_ADD_DEL_TUNNEL_REPLY,
+  REPLY_MACRO2(VL_API_GRE_TUNNEL_ADD_DEL_REPLY,
   ({
     rmp->sw_if_index = ntohl (sw_if_index);
   }));
@@ -99,32 +143,23 @@ static void send_gre_tunnel_details
   (gre_tunnel_t * t, vl_api_registration_t * reg, u32 context)
 {
   vl_api_gre_tunnel_details_t *rmp;
-  u8 is_ipv6 = t->tunnel_dst.fp_proto == FIB_PROTOCOL_IP6 ? 1 : 0;
-  fib_table_t *ft;
 
   rmp = vl_msg_api_alloc (sizeof (*rmp));
   clib_memset (rmp, 0, sizeof (*rmp));
   rmp->_vl_msg_id = htons (VL_API_GRE_TUNNEL_DETAILS);
-  if (!is_ipv6)
-    {
-      clib_memcpy (rmp->src_address, &(t->tunnel_src.ip4.as_u8), 4);
-      clib_memcpy (rmp->dst_address, &(t->tunnel_dst.fp_addr.ip4.as_u8), 4);
-      ft = fib_table_get (t->outer_fib_index, FIB_PROTOCOL_IP4);
-      rmp->outer_fib_id = htonl (ft->ft_table_id);
-    }
-  else
-    {
-      clib_memcpy (rmp->src_address, &(t->tunnel_src.ip6.as_u8), 16);
-      clib_memcpy (rmp->dst_address, &(t->tunnel_dst.fp_addr.ip6.as_u8), 16);
-      ft = fib_table_get (t->outer_fib_index, FIB_PROTOCOL_IP6);
-      rmp->outer_fib_id = htonl (ft->ft_table_id);
-    }
-  rmp->tunnel_type = t->type;
-  rmp->instance = htonl (t->user_instance);
-  rmp->sw_if_index = htonl (t->sw_if_index);
-  rmp->session_id = htons (t->session_id);
+
+  ip_address_encode (&t->tunnel_src, IP46_TYPE_ANY, &rmp->tunnel.src);
+  ip_address_encode (&t->tunnel_dst.fp_addr, IP46_TYPE_ANY, &rmp->tunnel.dst);
+
+  rmp->tunnel.outer_fib_id =
+    htonl (fib_table_get_table_id
+	   (t->outer_fib_index, t->tunnel_dst.fp_proto));
+
+  rmp->tunnel.type = gre_tunnel_type_encode (t->type);
+  rmp->tunnel.instance = htonl (t->user_instance);
+  rmp->tunnel.sw_if_index = htonl (t->sw_if_index);
+  rmp->tunnel.session_id = htons (t->session_id);
   rmp->context = context;
-  rmp->is_ipv6 = is_ipv6;
 
   vl_api_send_msg (reg, (u8 *) rmp);
 }
diff --git a/src/vnet/gre/interface.c b/src/vnet/gre/interface.c
index 4f5f528acf9..2025838d9ad 100644
--- a/src/vnet/gre/interface.c
+++ b/src/vnet/gre/interface.c
@@ -51,7 +51,7 @@ format_gre_tunnel (u8 * s, va_list * args)
 }
 
 static gre_tunnel_t *
-gre_tunnel_db_find (const vnet_gre_add_del_tunnel_args_t * a,
+gre_tunnel_db_find (const vnet_gre_tunnel_add_del_args_t * a,
 		    u32 outer_fib_index, gre_tunnel_key_t * key)
 {
   gre_main_t *gm = &gre_main;
@@ -60,13 +60,13 @@ gre_tunnel_db_find (const vnet_gre_add_del_tunnel_args_t * a,
   if (!a->is_ipv6)
     {
       gre_mk_key4 (a->src.ip4, a->dst.ip4, outer_fib_index,
-		   a->tunnel_type, a->session_id, &key->gtk_v4);
+		   a->type, a->session_id, &key->gtk_v4);
       p = hash_get_mem (gm->tunnel_by_key4, &key->gtk_v4);
     }
   else
     {
       gre_mk_key6 (&a->src.ip6, &a->dst.ip6, outer_fib_index,
-		   a->tunnel_type, a->session_id, &key->gtk_v6);
+		   a->type, a->session_id, &key->gtk_v6);
       p = hash_get_mem (gm->tunnel_by_key6, &key->gtk_v6);
     }
 
@@ -172,7 +172,7 @@ gre_tunnel_restack (gre_tunnel_t * gt)
 }
 
 static int
-vnet_gre_tunnel_add (vnet_gre_add_del_tunnel_args_t * a,
+vnet_gre_tunnel_add (vnet_gre_tunnel_add_del_args_t * a,
 		     u32 outer_fib_index, u32 * sw_if_indexp)
 {
   gre_main_t *gm = &gre_main;
@@ -208,7 +208,7 @@ vnet_gre_tunnel_add (vnet_gre_add_del_tunnel_args_t * a,
   t->dev_instance = t_idx;	/* actual */
   t->user_instance = u_idx;	/* name */
 
-  t->type = a->tunnel_type;
+  t->type = a->type;
   if (t->type == GRE_TUNNEL_TYPE_ERSPAN)
     t->session_id = a->session_id;
 
@@ -310,7 +310,7 @@ vnet_gre_tunnel_add (vnet_gre_add_del_tunnel_args_t * a,
 }
 
 static int
-vnet_gre_tunnel_delete (vnet_gre_add_del_tunnel_args_t * a,
+vnet_gre_tunnel_delete (vnet_gre_tunnel_add_del_args_t * a,
 			u32 outer_fib_index, u32 * sw_if_indexp)
 {
   gre_main_t *gm = &gre_main;
@@ -362,7 +362,7 @@ vnet_gre_tunnel_delete (vnet_gre_add_del_tunnel_args_t * a,
 }
 
 int
-vnet_gre_add_del_tunnel (vnet_gre_add_del_tunnel_args_t * a,
+vnet_gre_tunnel_add_del (vnet_gre_tunnel_add_del_args_t * a,
 			 u32 * sw_if_indexp)
 {
   u32 outer_fib_index;
@@ -423,7 +423,7 @@ create_gre_tunnel_command_fn (vlib_main_t * vm,
 			      vlib_cli_command_t * cmd)
 {
   unformat_input_t _line_input, *line_input = &_line_input;
-  vnet_gre_add_del_tunnel_args_t _a, *a = &_a;
+  vnet_gre_tunnel_add_del_args_t _a, *a = &_a;
   ip46_address_t src, dst;
   u32 instance = ~0;
   u32 outer_fib_id = 0;
@@ -512,7 +512,7 @@ create_gre_tunnel_command_fn (vlib_main_t * vm,
   clib_memset (a, 0, sizeof (*a));
   a->is_add = is_add;
   a->outer_fib_id = outer_fib_id;
-  a->tunnel_type = t_type;
+  a->type = t_type;
   a->session_id = session_id;
   a->is_ipv6 = ipv6_set;
   a->instance = instance;
@@ -527,7 +527,7 @@ create_gre_tunnel_command_fn (vlib_main_t * vm,
       clib_memcpy (&a->dst.ip6, &dst.ip6, sizeof (dst.ip6));
     }
 
-  rv = vnet_gre_add_del_tunnel (a, &sw_if_index);
+  rv = vnet_gre_tunnel_add_del (a, &sw_if_index);
 
   switch (rv)
     {
@@ -554,7 +554,7 @@ create_gre_tunnel_command_fn (vlib_main_t * vm,
       goto done;
     default:
       error =
-	clib_error_return (0, "vnet_gre_add_del_tunnel returned %d", rv);
+	clib_error_return (0, "vnet_gre_tunnel_add_del returned %d", rv);
       goto done;
     }
 
diff --git a/src/vpp/api/custom_dump.c b/src/vpp/api/custom_dump.c
index 9e150e91a7b..5f6ba063bac 100644
--- a/src/vpp/api/custom_dump.c
+++ b/src/vpp/api/custom_dump.c
@@ -1931,28 +1931,26 @@ static void *vl_api_geneve_tunnel_dump_t_print
   FINISH;
 }
 
-static void *vl_api_gre_add_del_tunnel_t_print
-  (vl_api_gre_add_del_tunnel_t * mp, void *handle)
+static void *vl_api_gre_tunnel_add_del_t_print
+  (vl_api_gre_tunnel_add_del_t * mp, void *handle)
 {
   u8 *s;
-  ip46_address_t src = to_ip46 (mp->is_ipv6, mp->src_address);
-  ip46_address_t dst = to_ip46 (mp->is_ipv6, mp->dst_address);
 
-  s = format (0, "SCRIPT: gre_add_del_tunnel ");
+  s = format (0, "SCRIPT: gre_tunnel_add_del ");
 
-  s = format (s, "dst %U ", format_ip46_address, &dst, IP46_TYPE_ANY);
-  s = format (s, "src %U ", format_ip46_address, &src, IP46_TYPE_ANY);
+  s = format (s, "dst %U ", format_vl_api_address, &mp->tunnel.dst);
+  s = format (s, "src %U ", format_vl_api_address, &mp->tunnel.src);
 
-  s = format (s, "instance %d ", ntohl (mp->instance));
+  s = format (s, "instance %d ", ntohl (mp->tunnel.instance));
 
-  if (mp->tunnel_type == GRE_TUNNEL_TYPE_TEB)
+  if (mp->tunnel.type == GRE_TUNNEL_TYPE_TEB)
     s = format (s, "teb ");
 
-  if (mp->tunnel_type == GRE_TUNNEL_TYPE_ERSPAN)
-    s = format (s, "erspan %d ", ntohs (mp->session_id));
+  if (mp->tunnel.type == GRE_TUNNEL_TYPE_ERSPAN)
+    s = format (s, "erspan %d ", ntohs (mp->tunnel.session_id));
 
-  if (mp->outer_fib_id)
-    s = format (s, "outer-fib-id %d ", ntohl (mp->outer_fib_id));
+  if (mp->tunnel.outer_fib_id)
+    s = format (s, "outer-fib-id %d ", ntohl (mp->tunnel.outer_fib_id));
 
   if (mp->is_add == 0)
     s = format (s, "del ");
@@ -3846,7 +3844,7 @@ _(VXLAN_TUNNEL_DUMP, vxlan_tunnel_dump)                                 \
 _(VXLAN_OFFLOAD_RX, vxlan_offload_rx)                                   \
 _(GENEVE_ADD_DEL_TUNNEL, geneve_add_del_tunnel)                         \
 _(GENEVE_TUNNEL_DUMP, geneve_tunnel_dump)                               \
-_(GRE_ADD_DEL_TUNNEL, gre_add_del_tunnel)                               \
+_(GRE_TUNNEL_ADD_DEL, gre_tunnel_add_del)                               \
 _(GRE_TUNNEL_DUMP, gre_tunnel_dump)                                     \
 _(L2_FIB_CLEAR_TABLE, l2_fib_clear_table)                               \
 _(L2_INTERFACE_EFP_FILTER, l2_interface_efp_filter)                     \
diff --git a/test/test_gre.py b/test/test_gre.py
index 6b3c23f273a..71117ad738c 100644
--- a/test/test_gre.py
+++ b/test/test_gre.py
@@ -11,16 +11,11 @@ from scapy.volatile import RandMAC, RandIP
 
 from framework import VppTestCase, VppTestRunner
 from vpp_sub_interface import L2_VTR_OP, VppDot1QSubint
-from vpp_gre_interface import VppGreInterface, VppGre6Interface
+from vpp_gre_interface import VppGreInterface
 from vpp_ip import DpoProto
 from vpp_ip_route import VppIpRoute, VppRoutePath, VppIpTable
 from util import ppp, ppc
-
-
-class GreTunnelTypes:
-    TT_L3 = 0
-    TT_TEB = 1
-    TT_ERSPAN = 2
+from vpp_papi import VppEnum
 
 
 class TestGRE(VppTestCase):
@@ -567,9 +562,9 @@ class TestGRE(VppTestCase):
         #  - assign an IP Address
         #  - Add a route via the tunnel
         #
-        gre_if = VppGre6Interface(self,
-                                  self.pg2.local_ip6,
-                                  "1002::1")
+        gre_if = VppGreInterface(self,
+                                 self.pg2.local_ip6,
+                                 "1002::1")
         gre_if.add_vpp_config()
         gre_if.admin_up()
         gre_if.config_ip6()
@@ -762,10 +757,12 @@ class TestGRE(VppTestCase):
         #
         gre_if1 = VppGreInterface(self, self.pg0.local_ip4,
                                   "2.2.2.2",
-                                  type=GreTunnelTypes.TT_TEB)
+                                  type=(VppEnum.vl_api_gre_tunnel_type_t.
+                                        GRE_API_TUNNEL_TYPE_TEB))
         gre_if2 = VppGreInterface(self, self.pg0.local_ip4,
                                   "2.2.2.3",
-                                  type=GreTunnelTypes.TT_TEB)
+                                  type=(VppEnum.vl_api_gre_tunnel_type_t.
+                                        GRE_API_TUNNEL_TYPE_TEB))
         gre_if1.add_vpp_config()
         gre_if2.add_vpp_config()
 
diff --git a/test/test_reassembly.py b/test/test_reassembly.py
index 8cfb109b0b5..07d5737ffac 100644
--- a/test/test_reassembly.py
+++ b/test/test_reassembly.py
@@ -15,7 +15,7 @@ from scapy.layers.inet6 import IPv6, IPv6ExtHdrFragment, ICMPv6ParamProblem,\
 
 from framework import VppTestCase, VppTestRunner
 from util import ppp, fragment_rfc791, fragment_rfc8200
-from vpp_gre_interface import VppGreInterface, VppGre6Interface
+from vpp_gre_interface import VppGreInterface
 from vpp_ip import DpoProto
 from vpp_ip_route import VppIpRoute, VppRoutePath
 
@@ -1122,7 +1122,7 @@ class TestFIFReassembly(VppTestCase):
         # it shared for multiple test cases
         self.tun_ip6 = "1002::1"
 
-        self.gre6 = VppGre6Interface(self, self.src_if.local_ip6, self.tun_ip6)
+        self.gre6 = VppGreInterface(self, self.src_if.local_ip6, self.tun_ip6)
         self.gre6.add_vpp_config()
         self.gre6.admin_up()
         self.gre6.config_ip6()
diff --git a/test/test_span.py b/test/test_span.py
index 78a4f7608ed..e4b0d0ad2b4 100644
--- a/test/test_span.py
+++ b/test/test_span.py
@@ -10,8 +10,10 @@ from scapy.layers.vxlan import VXLAN
 from framework import VppTestCase, VppTestRunner
 from util import Host, ppp
 from vpp_sub_interface import L2_VTR_OP, VppDot1QSubint, VppDot1ADSubint
-from vpp_gre_interface import VppGreInterface, VppGre6Interface
+from vpp_gre_interface import VppGreInterface
 from collections import namedtuple
+from vpp_papi import VppEnum
+
 
 Tag = namedtuple('Tag', ['dot1', 'vlan'])
 DOT1AD = 0x88A8
@@ -271,8 +273,9 @@ class TestSpan(VppTestCase):
 
         gre_if = VppGreInterface(self, self.pg2.local_ip4,
                                  self.pg2.remote_ip4,
-                                 type=2,
-                                 session=543)
+                                 session=543,
+                                 type=(VppEnum.vl_api_gre_tunnel_type_t.
+                                       GRE_API_TUNNEL_TYPE_ERSPAN))
 
         gre_if.add_vpp_config()
         gre_if.admin_up()
@@ -319,7 +322,8 @@ class TestSpan(VppTestCase):
 
         gre_if = VppGreInterface(self, self.pg2.local_ip4,
                                  self.pg2.remote_ip4,
-                                 type=1)
+                                 type=(VppEnum.vl_api_gre_tunnel_type_t.
+                                       GRE_API_TUNNEL_TYPE_TEB))
 
         gre_if.add_vpp_config()
         gre_if.admin_up()
diff --git a/test/vpp_gre_interface.py b/test/vpp_gre_interface.py
index 46dce365a38..818f429f5c9 100644
--- a/test/vpp_gre_interface.py
+++ b/test/vpp_gre_interface.py
@@ -1,6 +1,7 @@
 
 from vpp_interface import VppInterface
 import socket
+from vpp_papi import VppEnum
 
 
 class VppGreInterface(VppInterface):
@@ -8,20 +9,22 @@ class VppGreInterface(VppInterface):
     VPP GRE interface
     """
 
-    def __init__(self, test, src_ip, dst_ip, outer_fib_id=0, type=0,
+    def __init__(self, test, src_ip, dst_ip, outer_fib_id=0, type=None,
                  session=0):
         """ Create VPP GRE interface """
         super(VppGreInterface, self).__init__(test)
         self.t_src = src_ip
         self.t_dst = dst_ip
         self.t_outer_fib = outer_fib_id
-        self.t_type = type
         self.t_session = session
+        self.t_type = type
+        if not self.t_type:
+            self.t_type = (VppEnum.vl_api_gre_tunnel_type_t.
+                           GRE_API_TUNNEL_TYPE_L3)
 
     def add_vpp_config(self):
-        s = socket.inet_pton(socket.AF_INET, self.t_src)
-        d = socket.inet_pton(socket.AF_INET, self.t_dst)
-        r = self.test.vapi.gre_add_del_tunnel(s, d,
+        r = self.test.vapi.gre_tunnel_add_del(self.t_src,
+                                              self.t_dst,
                                               outer_fib_id=self.t_outer_fib,
                                               tunnel_type=self.t_type,
                                               session_id=self.t_session)
@@ -30,10 +33,9 @@ class VppGreInterface(VppInterface):
         self.test.registry.register(self, self.test.logger)
 
     def remove_vpp_config(self):
-        s = socket.inet_pton(socket.AF_INET, self.t_src)
-        d = socket.inet_pton(socket.AF_INET, self.t_dst)
         self.unconfig()
-        self.test.vapi.gre_add_del_tunnel(s, d,
+        self.test.vapi.gre_tunnel_add_del(self.t_src,
+                                          self.t_dst,
                                           outer_fib_id=self.t_outer_fib,
                                           tunnel_type=self.t_type,
                                           session_id=self.t_session,
@@ -42,44 +44,6 @@ class VppGreInterface(VppInterface):
     def object_id(self):
         return "gre-%d" % self.sw_if_index
 
-
-class VppGre6Interface(VppInterface):
-    """
-    VPP GRE IPv6 interface
-    """
-
-    def __init__(self, test, src_ip, dst_ip, outer_fib_id=0, type=0,
-                 session=0):
-        """ Create VPP GRE interface """
-        super(VppGre6Interface, self).__init__(test)
-        self.t_src = src_ip
-        self.t_dst = dst_ip
-        self.t_outer_fib = outer_fib_id
-        self.t_type = type
-        self.t_session = session
-
-    def add_vpp_config(self):
-        s = socket.inet_pton(socket.AF_INET6, self.t_src)
-        d = socket.inet_pton(socket.AF_INET6, self.t_dst)
-        r = self.test.vapi.gre_add_del_tunnel(s, d,
-                                              outer_fib_id=self.t_outer_fib,
-                                              tunnel_type=self.t_type,
-                                              session_id=self.t_session,
-                                              is_ip6=1)
-        self.set_sw_if_index(r.sw_if_index)
-        self.generate_remote_hosts()
-        self.test.registry.register(self, self.test.logger)
-
-    def remove_vpp_config(self):
-        s = socket.inet_pton(socket.AF_INET6, self.t_src)
-        d = socket.inet_pton(socket.AF_INET6, self.t_dst)
-        self.unconfig()
-        self.test.vapi.gre_add_del_tunnel(s, d,
-                                          outer_fib_id=self.t_outer_fib,
-                                          tunnel_type=self.t_type,
-                                          session_id=self.t_session,
-                                          is_add=0,
-                                          is_ip6=1)
-
-    def object_id(self):
-        return "gre-%d" % self._sw_if_index
+    def query_vpp_config(self):
+        return (self.test.vapi.gre_tunnel_dump(
+            sw_if_index=self._sw_if_index))
diff --git a/test/vpp_papi_provider.py b/test/vpp_papi_provider.py
index 06fa31bd586..62fc0aa42b3 100644
--- a/test/vpp_papi_provider.py
+++ b/test/vpp_papi_provider.py
@@ -68,7 +68,7 @@ defaultmapping = {
     'gbp_subnet_add_del': {'sw_if_index': 4294967295, 'epg_id': 65535, },
     'geneve_add_del_tunnel': {'mcast_sw_if_index': 4294967295, 'is_add': 1,
                               'decap_next_index': 4294967295, },
-    'gre_add_del_tunnel': {'instance': 4294967295, 'is_add': 1, },
+    'gre_tunnel_add_del': {'instance': 4294967295, 'is_add': 1, },
     'gtpu_add_del_tunnel': {'is_add': 1, 'mcast_sw_if_index': 4294967295,
                             'decap_next_index': 4294967295, },
     'input_acl_set_interface': {'ip4_table_index': 4294967295,
@@ -604,15 +604,14 @@ class VppPapiProvider(object):
              }
         )
 
-    def gre_add_del_tunnel(self,
-                           src_address,
-                           dst_address,
+    def gre_tunnel_add_del(self,
+                           src,
+                           dst,
                            outer_fib_id=0,
                            tunnel_type=0,
                            instance=0xFFFFFFFF,
                            session_id=0,
-                           is_add=1,
-                           is_ip6=0):
+                           is_add=1):
         """ Add a GRE tunnel
 
         :param src_address:
@@ -626,15 +625,17 @@ class VppPapiProvider(object):
         """
 
         return self.api(
-            self.papi.gre_add_del_tunnel,
+            self.papi.gre_tunnel_add_del,
             {'is_add': is_add,
-             'is_ipv6': is_ip6,
-             'tunnel_type': tunnel_type,
-             'instance': instance,
-             'src_address': src_address,
-             'dst_address': dst_address,
-             'outer_fib_id': outer_fib_id,
-             'session_id': session_id}
+             'tunnel':
+             {
+                 'type': tunnel_type,
+                 'instance': instance,
+                 'src': src,
+                 'dst': dst,
+                 'outer_fib_id': outer_fib_id,
+                 'session_id': session_id}
+             }
         )
 
     def udp_encap_add(self,