Convert lisp-gpe encap to interface tx node

With this change, one lisp-gpe interface is created per vrf/overlay
tenant and its tx node is used as encapsulator (or tunnel ingress). For
all intents and purposes, the tx node inherits all functions previously
performed by the lisp-gpe-encap node and it maintains said node's
position in lisp-gpe's data-path graph. Chiefly, this opens the
possibility to chain interface features, like IPSec, transparently with
LISP. Furthermore, it brings basic data plane support for vrfs and LISP
instance-ids (or virtual network instances as per RFC7364).

Other changes include improvements to lisp-gpe enable and disable
sequences and corresponding API/VAT fixes.

Change-Id: I085500450660a976b587b1a720e282f6e728d580
Signed-off-by: Florin Coras <fcoras@cisco.com>

2 files changed, 42 insertions, 3 deletions

diff --git a/vpp/api/api.c b/vpp/api/api.c
index 4956a43a297..ea766938b34 100644
--- a/vpp/api/api.c
+++ b/vpp/api/api.c
@@ -321,6 +321,7 @@ _(LISP_ADD_DEL_LOCATOR, lisp_add_del_locator)                           \
 _(LISP_ADD_DEL_LOCAL_EID, lisp_add_del_local_eid)                       \
 _(LISP_GPE_ADD_DEL_FWD_ENTRY, lisp_gpe_add_del_fwd_entry)               \
 _(LISP_ADD_DEL_MAP_RESOLVER, lisp_add_del_map_resolver)                 \
+_(LISP_GPE_ENABLE_DISABLE, lisp_gpe_enable_disable)                     \
 _(LISP_GPE_ADD_DEL_IFACE, lisp_gpe_add_del_iface)                       \
 _(LISP_LOCATOR_SET_DUMP, lisp_locator_set_dump)                         \
 _(LISP_LOCAL_EID_TABLE_DUMP, lisp_local_eid_table_dump)                 \
@@ -4465,7 +4466,7 @@ vl_api_lisp_gpe_add_del_tunnel_t_handler
     a->ver_res = mp->ver_res;
     a->res = mp->res;
     a->next_protocol = mp->next_protocol;
-    a->iid = clib_net_to_host_u32 (mp->iid);
+    a->vni = clib_net_to_host_u32 (mp->iid);
 
     rv = vnet_lisp_gpe_add_del_tunnel (a, &sw_if_index);
     
@@ -4580,7 +4581,7 @@ vl_api_lisp_add_del_local_eid_t_handler(
     a->locator_set_index = locator_set_index;
     a->local = 1;
 
-    rv = vnet_lisp_add_del_mapping(a, &map_index);
+    rv = vnet_lisp_add_del_local_mapping(a, &map_index);
 
 out:
     vec_free(name);
@@ -4684,6 +4685,20 @@ vl_api_lisp_add_del_map_resolver_t_handler(
 }
 
 static void
+vl_api_lisp_gpe_enable_disable_t_handler(
+    vl_api_lisp_gpe_enable_disable_t *mp)
+{
+    vl_api_lisp_gpe_enable_disable_reply_t *rmp;
+    int rv = 0;
+    vnet_lisp_gpe_enable_disable_args_t _a, * a = &_a;
+
+    a->is_en = mp->is_en;
+    vnet_lisp_gpe_enable_disable (a);
+
+    REPLY_MACRO(VL_API_LISP_GPE_ENABLE_DISABLE_REPLY);
+}
+
+static void
 vl_api_lisp_gpe_add_del_iface_t_handler(
     vl_api_lisp_gpe_add_del_iface_t *mp)
 {
@@ -4692,6 +4707,8 @@ vl_api_lisp_gpe_add_del_iface_t_handler(
     vnet_lisp_gpe_add_del_iface_args_t _a, * a = &_a;
 
     a->is_add = mp->is_add;
+    a->table_id = mp->table_id;
+    a->vni = mp->vni;
     vnet_lisp_gpe_add_del_iface (a, 0);
 
     REPLY_MACRO(VL_API_LISP_GPE_ADD_DEL_IFACE_REPLY);
@@ -4837,7 +4854,7 @@ send_lisp_gpe_tunnel_details (lisp_gpe_tunnel_t *tunnel,
     rmp->flags = tunnel->flags;
     rmp->ver_res = tunnel->ver_res;
     rmp->res = tunnel->res;
-    rmp->iid = htonl(tunnel->iid);
+    rmp->iid = htonl(tunnel->vni);
 
     vl_msg_api_send_shmem (q, (u8 *)&rmp);
 }
diff --git a/vpp/api/vpe.api b/vpp/api/vpe.api
index f255fdaf622..afad1c25d0b 100644
--- a/vpp/api/vpe.api
+++ b/vpp/api/vpe.api
@@ -2239,6 +2239,26 @@ define lisp_add_del_map_resolver_reply {
     i32 retval;
 };
 
+/** \brief enable or disable lisp-gpe protocol
+    @param client_index - opaque cookie to identify the sender
+    @param context - sender context, to match reply w/ request
+    @param is_en - enable protocol if non-zero, else disable
+*/
+define lisp_gpe_enable_disable {
+    u32 client_index;
+    u32 context;
+    u8  is_en;
+};
+
+/** \brief Reply for gpe enable/disable
+    @param context - returned sender context, to match reply w/ request
+    @param retval - return code
+*/
+define lisp_gpe_enable_disable_reply {
+    u32 context;
+    i32 retval;
+};
+
 /** \brief add or delete gpe_iface
     @param client_index - opaque cookie to identify the sender
     @param context - sender context, to match reply w/ request
@@ -2248,6 +2268,8 @@ define lisp_gpe_add_del_iface {
     u32 client_index;
     u32 context;
     u8  is_add;
+    u32 table_id;
+    u32 vni;
 };
 
 /** \brief Reply for gpe_iface add/del