nat: per vrf session limits
[vpp.git] / src / plugins / nat / nat_api.c
index 55e6bf9..c58e88b 100644 (file)
 #include <nat/nat_det.h>
 #include <nat/nat64.h>
 #include <nat/nat66.h>
-#include <nat/dslite.h>
-#include <nat/nat_reass.h>
 #include <nat/nat_inlines.h>
+#include <nat/nat44/inlines.h>
+#include <nat/nat_ha.h>
 #include <vlibapi/api.h>
 #include <vlibmemory/api.h>
 
 #include <nat/nat_msg_enum.h>
 #include <vnet/fib/fib_table.h>
+#include <vnet/ip/ip_types_api.h>
 
-#define vl_api_nat44_lb_addr_port_t_endian vl_noop_handler
 #define vl_api_nat44_add_del_lb_static_mapping_t_endian vl_noop_handler
 #define vl_api_nat44_nat44_lb_static_mapping_details_t_endian vl_noop_handler
 
@@ -62,7 +62,6 @@
     vec_free (s);                               \
     return handle;
 
-
 /******************************/
 /*** Common NAT plugin APIs ***/
 /******************************/
@@ -97,7 +96,7 @@ vl_api_nat_show_config_t_handler (vl_api_nat_show_config_t * mp)
 {
   vl_api_nat_show_config_reply_t *rmp;
   snat_main_t *sm = &snat_main;
-  dslite_main_t *dm = &dslite_main;
+  //dslite_main_t *dm = &dslite_main;
   nat64_main_t *n64m = &nat64_main;
   int rv = 0;
 
@@ -105,9 +104,9 @@ vl_api_nat_show_config_t_handler (vl_api_nat_show_config_t * mp)
   REPLY_MACRO2 (VL_API_NAT_SHOW_CONFIG_REPLY,
   ({
     rmp->translation_buckets = htonl (sm->translation_buckets);
-    rmp->translation_memory_size = htonl (sm->translation_memory_size);
+    rmp->translation_memory_size = clib_host_to_net_u64 (sm->translation_memory_size);
     rmp->user_buckets = htonl (sm->user_buckets);
-    rmp->user_memory_size = htonl (sm->user_memory_size);
+    rmp->user_memory_size = clib_host_to_net_u64 (sm->user_memory_size);
     rmp->max_translations_per_user = htonl (sm->max_translations_per_user);
     rmp->outside_vrf_id = htonl (sm->outside_vrf_id);
     rmp->inside_vrf_id = htonl (sm->inside_vrf_id);
@@ -117,11 +116,11 @@ vl_api_nat_show_config_t_handler (vl_api_nat_show_config_t * mp)
     rmp->deterministic = sm->deterministic;
     rmp->endpoint_dependent = sm->endpoint_dependent;
     rmp->out2in_dpo = sm->out2in_dpo;
-    rmp->dslite_ce = dm->is_ce;
-    rmp->nat64_bib_buckets = n64m->bib_buckets;
-    rmp->nat64_bib_memory_size = n64m->bib_memory_size;
-    rmp->nat64_st_buckets = n64m->st_buckets;
-    rmp->nat64_st_memory_size = n64m->st_memory_size;
+    //rmp->dslite_ce = dm->is_ce;
+    rmp->nat64_bib_buckets = clib_net_to_host_u32(n64m->bib_buckets);
+    rmp->nat64_bib_memory_size = clib_net_to_host_u64(n64m->bib_memory_size);
+    rmp->nat64_st_buckets = clib_net_to_host_u32(n64m->st_buckets);
+    rmp->nat64_st_memory_size = clib_net_to_host_u64(n64m->st_memory_size);
   }));
   /* *INDENT-ON* */
 }
@@ -243,175 +242,89 @@ vl_api_nat_worker_dump_t_print (vl_api_nat_worker_dump_t * mp, void *handle)
 }
 
 static void
-vl_api_nat_ipfix_enable_disable_t_handler (vl_api_nat_ipfix_enable_disable_t *
-                                          mp)
+vl_api_nat44_set_session_limit_t_handler (vl_api_nat44_set_session_limit_t *
+                                         mp)
 {
   snat_main_t *sm = &snat_main;
-  vl_api_nat_ipfix_enable_disable_reply_t *rmp;
+  vl_api_nat44_set_session_limit_reply_t *rmp;
   int rv = 0;
 
-  rv = snat_ipfix_logging_enable_disable (mp->enable,
-                                         clib_host_to_net_u32
-                                         (mp->domain_id),
-                                         clib_host_to_net_u16
-                                         (mp->src_port));
+  rv = nat44_set_session_limit
+    (ntohl (mp->session_limit), ntohl (mp->vrf_id));
 
-  REPLY_MACRO (VL_API_NAT_IPFIX_ENABLE_DISABLE_REPLY);
+  REPLY_MACRO (VL_API_NAT_SET_WORKERS_REPLY);
 }
 
 static void *
-vl_api_nat_ipfix_enable_disable_t_print (vl_api_nat_ipfix_enable_disable_t *
-                                        mp, void *handle)
+vl_api_nat44_set_session_limit_t_print (vl_api_nat44_set_session_limit_t *
+                                       mp, void *handle)
 {
   u8 *s;
 
-  s = format (0, "SCRIPT: nat_ipfix_enable_disable ");
-  if (mp->domain_id)
-    s = format (s, "domain %d ", clib_net_to_host_u32 (mp->domain_id));
-  if (mp->src_port)
-    s = format (s, "src_port %d ", clib_net_to_host_u16 (mp->src_port));
-  if (!mp->enable)
-    s = format (s, "disable ");
+  s = format (0, "SCRIPT: nat44_set_session_limit ");
+  s = format (s, "session_limit %d", ntohl (mp->session_limit));
+  s = format (s, "vrf_id %d", ntohl (mp->vrf_id));
 
   FINISH;
 }
 
 static void
-vl_api_nat_set_reass_t_handler (vl_api_nat_set_reass_t * mp)
+vl_api_nat_set_log_level_t_handler (vl_api_nat_set_log_level_t * mp)
 {
   snat_main_t *sm = &snat_main;
-  vl_api_nat_set_reass_reply_t *rmp;
+  vl_api_nat_set_log_level_reply_t *rmp;
   int rv = 0;
 
-  rv =
-    nat_reass_set (ntohl (mp->timeout), ntohs (mp->max_reass), mp->max_frag,
-                  mp->drop_frag, mp->is_ip6);
+  if (sm->log_level > NAT_LOG_DEBUG)
+    rv = VNET_API_ERROR_UNSUPPORTED;
+  else
+    sm->log_level = mp->log_level;
 
-  REPLY_MACRO (VL_API_NAT_SET_REASS_REPLY);
+  REPLY_MACRO (VL_API_NAT_SET_WORKERS_REPLY);
 }
 
 static void *
-vl_api_nat_set_reass_t_print (vl_api_nat_set_reass_t * mp, void *handle)
+vl_api_nat_set_log_level_t_print (vl_api_nat_set_log_level_t *
+                                 mp, void *handle)
 {
   u8 *s;
 
-  s = format (0, "SCRIPT: nat_set_reass ");
-  s = format (s, "timeout %d max_reass %d max_frag %d drop_frag %d is_ip6 %d",
-             clib_host_to_net_u32 (mp->timeout),
-             clib_host_to_net_u16 (mp->max_reass),
-             mp->max_frag, mp->drop_frag, mp->is_ip6);
+  s = format (0, "SCRIPT: nat_set_log_level ");
+  s = format (s, "log_level %d", mp->log_level);
 
   FINISH;
 }
 
 static void
-vl_api_nat_get_reass_t_handler (vl_api_nat_get_reass_t * mp)
+vl_api_nat_ipfix_enable_disable_t_handler (vl_api_nat_ipfix_enable_disable_t *
+                                          mp)
 {
   snat_main_t *sm = &snat_main;
-  vl_api_nat_get_reass_reply_t *rmp;
+  vl_api_nat_ipfix_enable_disable_reply_t *rmp;
   int rv = 0;
 
-  /* *INDENT-OFF* */
-  REPLY_MACRO2 (VL_API_NAT_GET_REASS_REPLY,
-  ({
-    rmp->ip4_timeout = htonl (nat_reass_get_timeout(0));
-    rmp->ip4_max_reass = htons (nat_reass_get_max_reass(0));
-    rmp->ip4_max_frag = nat_reass_get_max_frag(0);
-    rmp->ip4_drop_frag = nat_reass_is_drop_frag(0);
-    rmp->ip6_timeout = htonl (nat_reass_get_timeout(1));
-    rmp->ip6_max_reass = htons (nat_reass_get_max_reass(1));
-    rmp->ip6_max_frag = nat_reass_get_max_frag(1);
-    rmp->ip6_drop_frag = nat_reass_is_drop_frag(1);
-  }))
-  /* *INDENT-ON* */
-}
-
-static void *
-vl_api_nat_get_reass_t_print (vl_api_nat_get_reass_t * mp, void *handle)
-{
-  u8 *s;
-
-  s = format (0, "SCRIPT: nat_get_reass");
-
-  FINISH;
-}
-
-typedef struct nat_api_walk_ctx_t_
-{
-  vl_api_registration_t *reg;
-  u32 context;
-} nat_api_walk_ctx_t;
-
-static int
-nat_ip4_reass_walk_api (nat_reass_ip4_t * reass, void *arg)
-{
-  vl_api_nat_reass_details_t *rmp;
-  snat_main_t *sm = &snat_main;
-  nat_api_walk_ctx_t *ctx = arg;
-
-  rmp = vl_msg_api_alloc (sizeof (*rmp));
-  clib_memset (rmp, 0, sizeof (*rmp));
-  rmp->_vl_msg_id = ntohs (VL_API_NAT_REASS_DETAILS + sm->msg_id_base);
-  rmp->context = ctx->context;
-  clib_memcpy (rmp->src_addr, &(reass->key.src), 4);
-  clib_memcpy (rmp->dst_addr, &(reass->key.dst), 4);
-  rmp->proto = reass->key.proto;
-  rmp->frag_id = ntohl (reass->key.frag_id);
-  rmp->frag_n = reass->frag_n;
-  rmp->is_ip4 = 1;
-
-  vl_api_send_msg (ctx->reg, (u8 *) rmp);
-
-  return 0;
-}
-
-static int
-nat_ip6_reass_walk_api (nat_reass_ip6_t * reass, void *arg)
-{
-  vl_api_nat_reass_details_t *rmp;
-  snat_main_t *sm = &snat_main;
-  nat_api_walk_ctx_t *ctx = arg;
-
-  rmp = vl_msg_api_alloc (sizeof (*rmp));
-  clib_memset (rmp, 0, sizeof (*rmp));
-  rmp->_vl_msg_id = ntohs (VL_API_NAT_REASS_DETAILS + sm->msg_id_base);
-  rmp->context = ctx->context;
-  clib_memcpy (rmp->src_addr, &(reass->key.src), 16);
-  clib_memcpy (rmp->dst_addr, &(reass->key.dst), 16);
-  rmp->proto = reass->key.proto;
-  rmp->frag_id = ntohl (reass->key.frag_id);
-  rmp->frag_n = reass->frag_n;
-  rmp->is_ip4 = 0;
-
-  vl_api_send_msg (ctx->reg, (u8 *) rmp);
-
-  return 0;
-}
-
-static void
-vl_api_nat_reass_dump_t_handler (vl_api_nat_reass_dump_t * mp)
-{
-  vl_api_registration_t *reg;
-
-  reg = vl_api_client_index_to_registration (mp->client_index);
-  if (!reg)
-    return;
-
-  nat_api_walk_ctx_t ctx = {
-    .reg = reg,
-    .context = mp->context,
-  };
+  rv = snat_ipfix_logging_enable_disable (mp->enable,
+                                         clib_host_to_net_u32
+                                         (mp->domain_id),
+                                         clib_host_to_net_u16
+                                         (mp->src_port));
 
-  nat_ip4_reass_walk (nat_ip4_reass_walk_api, &ctx);
-  nat_ip6_reass_walk (nat_ip6_reass_walk_api, &ctx);
+  REPLY_MACRO (VL_API_NAT_IPFIX_ENABLE_DISABLE_REPLY);
 }
 
 static void *
-vl_api_nat_reass_dump_t_print (vl_api_nat_reass_dump_t * mp, void *handle)
+vl_api_nat_ipfix_enable_disable_t_print (vl_api_nat_ipfix_enable_disable_t *
+                                        mp, void *handle)
 {
   u8 *s;
 
-  s = format (0, "SCRIPT: nat_reass_dump");
+  s = format (0, "SCRIPT: nat_ipfix_enable_disable ");
+  if (mp->domain_id)
+    s = format (s, "domain %d ", clib_net_to_host_u32 (mp->domain_id));
+  if (mp->src_port)
+    s = format (s, "src_port %d ", clib_net_to_host_u16 (mp->src_port));
+  if (!mp->enable)
+    s = format (s, "disable ");
 
   FINISH;
 }
@@ -630,9 +543,228 @@ vl_api_nat_get_mss_clamping_t_print (vl_api_nat_get_mss_clamping_t * mp,
   FINISH;
 }
 
+static void
+vl_api_nat_ha_set_listener_t_handler (vl_api_nat_ha_set_listener_t * mp)
+{
+  snat_main_t *sm = &snat_main;
+  vl_api_nat_ha_set_listener_reply_t *rmp;
+  ip4_address_t addr;
+  int rv;
+
+  memcpy (&addr, &mp->ip_address, sizeof (addr));
+  rv =
+    nat_ha_set_listener (&addr, clib_net_to_host_u16 (mp->port),
+                        clib_net_to_host_u32 (mp->path_mtu));
+
+  REPLY_MACRO (VL_API_NAT_HA_SET_LISTENER_REPLY);
+}
+
+static void *
+vl_api_nat_ha_set_listener_t_print (vl_api_nat_ha_set_listener_t * mp,
+                                   void *handle)
+{
+  u8 *s;
+
+  s = format (0, "SCRIPT: nat_ha_set_listener ");
+  s = format (s, "ip_address %U ", format_ip4_address, mp->ip_address);
+  s = format (s, "port %d ", clib_net_to_host_u16 (mp->port));
+  s = format (s, "path_mtu %d", clib_net_to_host_u32 (mp->path_mtu));
+
+  FINISH;
+}
+
+static void
+vl_api_nat_ha_get_listener_t_handler (vl_api_nat_ha_get_listener_t * mp)
+{
+  snat_main_t *sm = &snat_main;
+  vl_api_nat_ha_get_listener_reply_t *rmp;
+  int rv = 0;
+  ip4_address_t addr;
+  u16 port;
+  u32 path_mtu;
+
+  nat_ha_get_listener (&addr, &port, &path_mtu);
+
+  /* *INDENT-OFF* */
+  REPLY_MACRO2 (VL_API_NAT_HA_GET_LISTENER_REPLY,
+  ({
+    clib_memcpy (rmp->ip_address, &addr, sizeof (ip4_address_t));
+    rmp->port = clib_host_to_net_u16 (port);
+    rmp->path_mtu = clib_host_to_net_u32 (path_mtu);
+  }))
+  /* *INDENT-ON* */
+}
+
+static void *
+vl_api_nat_ha_get_listener_t_print (vl_api_nat_ha_get_listener_t * mp,
+                                   void *handle)
+{
+  u8 *s;
+
+  s = format (0, "SCRIPT: nat_ha_get_listener");
+
+  FINISH;
+}
+
+static void
+vl_api_nat_ha_set_failover_t_handler (vl_api_nat_ha_set_failover_t * mp)
+{
+  snat_main_t *sm = &snat_main;
+  vl_api_nat_ha_set_failover_reply_t *rmp;
+  ip4_address_t addr;
+  int rv;
+
+  memcpy (&addr, &mp->ip_address, sizeof (addr));
+  rv =
+    nat_ha_set_failover (&addr, clib_net_to_host_u16 (mp->port),
+                        clib_net_to_host_u32 (mp->session_refresh_interval));
+
+  REPLY_MACRO (VL_API_NAT_HA_SET_FAILOVER_REPLY);
+}
+
+static void *
+vl_api_nat_ha_set_failover_t_print (vl_api_nat_ha_set_failover_t * mp,
+                                   void *handle)
+{
+  u8 *s;
+
+  s = format (0, "SCRIPT: nat_ha_set_failover ");
+  s = format (s, "ip_address %U ", format_ip4_address, mp->ip_address);
+  s = format (s, "port %d ", clib_net_to_host_u16 (mp->port));
+
+  FINISH;
+}
+
+static void
+vl_api_nat_ha_get_failover_t_handler (vl_api_nat_ha_get_failover_t * mp)
+{
+  snat_main_t *sm = &snat_main;
+  vl_api_nat_ha_get_failover_reply_t *rmp;
+  int rv = 0;
+  ip4_address_t addr;
+  u16 port;
+  u32 session_refresh_interval;
+
+  nat_ha_get_failover (&addr, &port, &session_refresh_interval);
+
+  /* *INDENT-OFF* */
+  REPLY_MACRO2 (VL_API_NAT_HA_GET_FAILOVER_REPLY,
+  ({
+    clib_memcpy (rmp->ip_address, &addr, sizeof (ip4_address_t));
+    rmp->port = clib_host_to_net_u16 (port);
+    rmp->session_refresh_interval = clib_host_to_net_u32 (session_refresh_interval);
+  }))
+  /* *INDENT-ON* */
+}
+
+static void *
+vl_api_nat_ha_get_failover_t_print (vl_api_nat_ha_get_failover_t * mp,
+                                   void *handle)
+{
+  u8 *s;
+
+  s = format (0, "SCRIPT: nat_ha_get_failover");
+
+  FINISH;
+}
+
+static void
+vl_api_nat_ha_flush_t_handler (vl_api_nat_ha_flush_t * mp)
+{
+  snat_main_t *sm = &snat_main;
+  vl_api_nat_ha_flush_reply_t *rmp;
+  int rv = 0;
+
+  nat_ha_flush (0);
+
+  REPLY_MACRO (VL_API_NAT_HA_FLUSH_REPLY);
+}
+
+static void *
+vl_api_nat_ha_flush_t_print (vl_api_nat_ha_flush_t * mp, void *handle)
+{
+  u8 *s;
+
+  s = format (0, "SCRIPT: nat_ha_flush ");
+
+  FINISH;
+}
+
+static void
+nat_ha_resync_completed_event_cb (u32 client_index, u32 pid, u32 missed_count)
+{
+  snat_main_t *sm = &snat_main;
+  vl_api_registration_t *reg;
+  vl_api_nat_ha_resync_completed_event_t *mp;
+
+  reg = vl_api_client_index_to_registration (client_index);
+  if (!reg)
+    return;
+
+  mp = vl_msg_api_alloc (sizeof (*mp));
+  clib_memset (mp, 0, sizeof (*mp));
+  mp->client_index = client_index;
+  mp->pid = pid;
+  mp->missed_count = clib_host_to_net_u32 (missed_count);
+  mp->_vl_msg_id =
+    ntohs (VL_API_NAT_HA_RESYNC_COMPLETED_EVENT + sm->msg_id_base);
+
+  vl_api_send_msg (reg, (u8 *) mp);
+}
+
+static void
+vl_api_nat_ha_resync_t_handler (vl_api_nat_ha_resync_t * mp)
+{
+  snat_main_t *sm = &snat_main;
+  vl_api_nat_ha_resync_reply_t *rmp;
+  int rv;
+
+  rv =
+    nat_ha_resync (mp->client_index, mp->pid,
+                  mp->want_resync_event ? nat_ha_resync_completed_event_cb :
+                  NULL);
+
+  REPLY_MACRO (VL_API_NAT_HA_RESYNC_REPLY);
+}
+
+static void *
+vl_api_nat_ha_resync_t_print (vl_api_nat_ha_resync_t * mp, void *handle)
+{
+  u8 *s;
+
+  s = format (0, "SCRIPT: nat_ha_resync ");
+  s =
+    format (s, "want_resync_event %d pid %d", mp->want_resync_event,
+           clib_host_to_net_u32 (mp->pid));
+
+  FINISH;
+}
+
 /*************/
 /*** NAT44 ***/
 /*************/
+static void
+vl_api_nat44_del_user_t_handler (vl_api_nat44_del_user_t * mp)
+{
+  snat_main_t *sm = &snat_main;
+  vl_api_nat44_del_user_reply_t *rmp;
+  ip4_address_t addr;
+  int rv;
+  memcpy (&addr.as_u8, mp->ip_address, 4);
+  rv = nat44_user_del (&addr, ntohl (mp->fib_index));
+  REPLY_MACRO (VL_API_NAT44_DEL_USER_REPLY);
+}
+
+static void *vl_api_nat44_del_user_t_print
+  (vl_api_nat44_del_user_t * mp, void *handle)
+{
+  u8 *s;
+  s = format (0, "SCRIPT: nat44_del_user ");
+  s = format (s, "ip_address %U fib_index %U ",
+             format_ip4_address, mp->ip_address, ntohl (mp->fib_index));
+  FINISH;
+}
+
 static void
   vl_api_nat44_add_del_address_range_t_handler
   (vl_api_nat44_add_del_address_range_t * mp)
@@ -640,6 +772,7 @@ static void
   snat_main_t *sm = &snat_main;
   vl_api_nat44_add_del_address_range_reply_t *rmp;
   ip4_address_t this_addr;
+  u8 is_add, twice_nat;
   u32 start_host_order, end_host_order;
   u32 vrf_id;
   int i, count;
@@ -658,6 +791,9 @@ static void
       goto send_reply;
     }
 
+  is_add = mp->is_add;
+  twice_nat = mp->flags & NAT_API_IS_TWICE_NAT;
+
   tmp = (u32 *) mp->first_ip_address;
   start_host_order = clib_host_to_net_u32 (tmp[0]);
   tmp = (u32 *) mp->last_ip_address;
@@ -676,16 +812,16 @@ static void
 
   for (i = 0; i < count; i++)
     {
-      if (mp->is_add)
-       rv = snat_add_address (sm, &this_addr, vrf_id, mp->twice_nat);
+      if (is_add)
+       rv = snat_add_address (sm, &this_addr, vrf_id, twice_nat);
       else
-       rv = snat_del_address (sm, this_addr, 0, mp->twice_nat);
+       rv = snat_del_address (sm, this_addr, 0, twice_nat);
 
       if (rv)
        goto send_reply;
 
       if (sm->out2in_dpo)
-       nat44_add_del_address_dpo (this_addr, mp->is_add);
+       nat44_add_del_address_dpo (this_addr, is_add);
 
       increment_v4_address (&this_addr);
     }
@@ -705,7 +841,7 @@ static void *vl_api_nat44_add_del_address_range_t_print
     {
       s = format (s, " - %U ", format_ip4_address, mp->last_ip_address);
     }
-  s = format (s, "twice_nat %d ", mp->twice_nat);
+  s = format (s, "twice_nat %d ", mp->flags & NAT_API_IS_TWICE_NAT);
   FINISH;
 }
 
@@ -728,7 +864,8 @@ send_nat44_address_details (snat_address_t * a,
     }
   else
     rmp->vrf_id = ~0;
-  rmp->twice_nat = twice_nat;
+  if (twice_nat)
+    rmp->flags |= NAT_API_IS_TWICE_NAT;
   rmp->context = context;
 
   vl_api_send_msg (reg, (u8 *) rmp);
@@ -773,13 +910,17 @@ static void
 {
   snat_main_t *sm = &snat_main;
   vl_api_nat44_interface_add_del_feature_reply_t *rmp;
-  u8 is_del = mp->is_add == 0;
   u32 sw_if_index = ntohl (mp->sw_if_index);
+  u8 is_del;
   int rv = 0;
 
+  is_del = !mp->is_add;
+
   VALIDATE_SW_IF_INDEX (mp);
 
-  rv = snat_interface_add_del (sw_if_index, mp->is_inside, is_del);
+  rv =
+    snat_interface_add_del (sw_if_index, mp->flags & NAT_API_IS_INSIDE,
+                           is_del);
 
   BAD_SW_IF_INDEX_LABEL;
 
@@ -794,7 +935,8 @@ static void *vl_api_nat44_interface_add_del_feature_t_print
   s = format (0, "SCRIPT: nat44_interface_add_del_feature ");
   s = format (s, "sw_if_index %d %s %s",
              clib_host_to_net_u32 (mp->sw_if_index),
-             mp->is_inside ? "in" : "out", mp->is_add ? "" : "del");
+             mp->flags & NAT_API_IS_INSIDE ? "in" : "out",
+             mp->is_add ? "" : "del");
 
   FINISH;
 }
@@ -810,9 +952,12 @@ send_nat44_interface_details (snat_interface_t * i,
   clib_memset (rmp, 0, sizeof (*rmp));
   rmp->_vl_msg_id = ntohs (VL_API_NAT44_INTERFACE_DETAILS + sm->msg_id_base);
   rmp->sw_if_index = ntohl (i->sw_if_index);
-  rmp->is_inside = (nat_interface_is_inside (i)
-                   && nat_interface_is_outside (i)) ? 2 :
-    nat_interface_is_inside (i);
+
+  if (nat_interface_is_inside (i))
+    rmp->flags |= NAT_API_IS_INSIDE;
+  if (nat_interface_is_outside (i))
+    rmp->flags |= NAT_API_IS_OUTSIDE;
+
   rmp->context = context;
 
   vl_api_send_msg (reg, (u8 *) rmp);
@@ -854,7 +999,6 @@ static void
 {
   snat_main_t *sm = &snat_main;
   vl_api_nat44_interface_add_del_output_feature_reply_t *rmp;
-  u8 is_del = mp->is_add == 0;
   u32 sw_if_index = ntohl (mp->sw_if_index);
   int rv = 0;
 
@@ -866,8 +1010,9 @@ static void
 
   VALIDATE_SW_IF_INDEX (mp);
 
-  rv = snat_interface_add_del_output_feature (sw_if_index, mp->is_inside,
-                                             is_del);
+  rv = snat_interface_add_del_output_feature (sw_if_index,
+                                             mp->flags & NAT_API_IS_INSIDE,
+                                             !mp->is_add);
 
   BAD_SW_IF_INDEX_LABEL;
 send_reply:
@@ -882,7 +1027,8 @@ static void *vl_api_nat44_interface_add_del_output_feature_t_print
   s = format (0, "SCRIPT: nat44_interface_add_del_output_feature ");
   s = format (s, "sw_if_index %d %s %s",
              clib_host_to_net_u32 (mp->sw_if_index),
-             mp->is_inside ? "in" : "out", mp->is_add ? "" : "del");
+             mp->flags & NAT_API_IS_INSIDE ? "in" : "out",
+             mp->is_add ? "" : "del");
 
   FINISH;
 }
@@ -901,7 +1047,9 @@ send_nat44_interface_output_feature_details (snat_interface_t * i,
     ntohs (VL_API_NAT44_INTERFACE_OUTPUT_FEATURE_DETAILS + sm->msg_id_base);
   rmp->sw_if_index = ntohl (i->sw_if_index);
   rmp->context = context;
-  rmp->is_inside = nat_interface_is_inside (i);
+
+  if (nat_interface_is_inside (i))
+    rmp->flags |= NAT_API_IS_INSIDE;
 
   vl_api_send_msg (reg, (u8 *) rmp);
 }
@@ -961,27 +1109,31 @@ static void
 
   memcpy (&local_addr.as_u8, mp->local_ip_address, 4);
   memcpy (&external_addr.as_u8, mp->external_ip_address, 4);
-  if (mp->addr_only == 0)
+
+  if (!(mp->flags & NAT_API_IS_ADDR_ONLY))
     {
       local_port = clib_net_to_host_u16 (mp->local_port);
       external_port = clib_net_to_host_u16 (mp->external_port);
     }
+
   vrf_id = clib_net_to_host_u32 (mp->vrf_id);
   external_sw_if_index = clib_net_to_host_u32 (mp->external_sw_if_index);
   proto = ip_proto_to_snat_proto (mp->protocol);
-  if (mp->twice_nat)
+
+  if (mp->flags & NAT_API_IS_TWICE_NAT)
     twice_nat = TWICE_NAT;
-  else if (mp->self_twice_nat)
+  else if (mp->flags & NAT_API_IS_SELF_TWICE_NAT)
     twice_nat = TWICE_NAT_SELF;
   mp->tag[sizeof (mp->tag) - 1] = 0;
   tag = format (0, "%s", mp->tag);
   vec_terminate_c_string (tag);
 
   rv = snat_add_static_mapping (local_addr, external_addr, local_port,
-                               external_port, vrf_id, mp->addr_only,
-                               external_sw_if_index, proto, mp->is_add,
-                               twice_nat, mp->out2in_only, tag, 0);
-
+                               external_port, vrf_id,
+                               mp->flags & NAT_API_IS_ADDR_ONLY,
+                               external_sw_if_index, proto,
+                               mp->is_add, twice_nat,
+                               mp->flags & NAT_API_IS_OUT2IN_ONLY, tag, 0);
   vec_free (tag);
 
 send_reply:
@@ -999,13 +1151,14 @@ static void *vl_api_nat44_add_del_static_mapping_t_print
              format_ip4_address, mp->local_ip_address,
              format_ip4_address, mp->external_ip_address);
 
-  if (mp->addr_only == 0)
+  if (!(mp->flags & NAT_API_IS_ADDR_ONLY))
     s = format (s, "local_port %d external_port %d ",
                clib_net_to_host_u16 (mp->local_port),
                clib_net_to_host_u16 (mp->external_port));
 
   s = format (s, "twice_nat %d out2in_only %d ",
-             mp->twice_nat, mp->out2in_only);
+             mp->flags & NAT_API_IS_TWICE_NAT,
+             mp->flags & NAT_API_IS_OUT2IN_ONLY);
 
   if (mp->vrf_id != ~0)
     s = format (s, "vrf %d", clib_net_to_host_u32 (mp->vrf_id));
@@ -1022,28 +1175,38 @@ send_nat44_static_mapping_details (snat_static_mapping_t * m,
 {
   vl_api_nat44_static_mapping_details_t *rmp;
   snat_main_t *sm = &snat_main;
+  u32 len = sizeof (*rmp);
 
-  rmp = vl_msg_api_alloc (sizeof (*rmp));
-  clib_memset (rmp, 0, sizeof (*rmp));
+  rmp = vl_msg_api_alloc (len);
+  clib_memset (rmp, 0, len);
   rmp->_vl_msg_id =
     ntohs (VL_API_NAT44_STATIC_MAPPING_DETAILS + sm->msg_id_base);
-  rmp->addr_only = is_addr_only_static_mapping (m);
+
   clib_memcpy (rmp->local_ip_address, &(m->local_addr), 4);
   clib_memcpy (rmp->external_ip_address, &(m->external_addr), 4);
   rmp->external_sw_if_index = ~0;
   rmp->vrf_id = htonl (m->vrf_id);
   rmp->context = context;
+
   if (m->twice_nat == TWICE_NAT)
-    rmp->twice_nat = 1;
+    rmp->flags |= NAT_API_IS_TWICE_NAT;
   else if (m->twice_nat == TWICE_NAT_SELF)
-    rmp->self_twice_nat = 1;
-  rmp->out2in_only = is_out2in_only_static_mapping (m);
-  if (rmp->addr_only == 0)
+    rmp->flags |= NAT_API_IS_SELF_TWICE_NAT;
+
+  if (is_out2in_only_static_mapping (m))
+    rmp->flags |= NAT_API_IS_OUT2IN_ONLY;
+
+  if (is_addr_only_static_mapping (m))
+    {
+      rmp->flags |= NAT_API_IS_ADDR_ONLY;
+    }
+  else
     {
       rmp->protocol = snat_proto_to_ip_proto (m->proto);
       rmp->external_port = htons (m->external_port);
       rmp->local_port = htons (m->local_port);
     }
+
   if (m->tag)
     strncpy ((char *) rmp->tag, (char *) m->tag, vec_len (m->tag));
 
@@ -1062,13 +1225,19 @@ send_nat44_static_map_resolve_details (snat_static_map_resolve_t * m,
   clib_memset (rmp, 0, sizeof (*rmp));
   rmp->_vl_msg_id =
     ntohs (VL_API_NAT44_STATIC_MAPPING_DETAILS + sm->msg_id_base);
-  rmp->addr_only = m->addr_only;
   clib_memcpy (rmp->local_ip_address, &(m->l_addr), 4);
   rmp->external_sw_if_index = htonl (m->sw_if_index);
   rmp->vrf_id = htonl (m->vrf_id);
   rmp->context = context;
-  rmp->twice_nat = m->twice_nat;
-  if (m->addr_only == 0)
+
+  if (m->twice_nat)
+    rmp->flags |= NAT_API_IS_TWICE_NAT;
+
+  if (m->addr_only)
+    {
+      rmp->flags |= NAT_API_IS_ADDR_ONLY;
+    }
+  else
     {
       rmp->protocol = snat_proto_to_ip_proto (m->proto);
       rmp->external_port = htons (m->e_port);
@@ -1143,7 +1312,7 @@ static void
       goto send_reply;
     }
 
-  if (mp->addr_only == 0)
+  if (!(mp->flags & NAT_API_IS_ADDR_ONLY))
     {
       port = clib_net_to_host_u16 (mp->port);
       proto = ip_proto_to_snat_proto (mp->protocol);
@@ -1159,9 +1328,9 @@ static void
   vec_terminate_c_string (tag);
 
   rv =
-    snat_add_static_mapping (addr, addr, port, port, vrf_id, mp->addr_only,
-                            sw_if_index, proto, mp->is_add, 0, 0, tag, 1);
-
+    snat_add_static_mapping (addr, addr, port, port, vrf_id,
+                            mp->flags & NAT_API_IS_ADDR_ONLY, sw_if_index,
+                            proto, mp->is_add, 0, 0, tag, 1);
   vec_free (tag);
 
 send_reply:
@@ -1179,7 +1348,7 @@ static void *vl_api_nat44_add_del_identity_mapping_t_print
   else
     s = format (s, "addr %U", format_ip4_address, mp->ip_address);
 
-  if (mp->addr_only == 0)
+  if (!(mp->flags & NAT_API_IS_ADDR_ONLY))
     s =
       format (s, " protocol %d port %d", mp->protocol,
              clib_net_to_host_u16 (mp->port));
@@ -1202,7 +1371,10 @@ send_nat44_identity_mapping_details (snat_static_mapping_t * m, int index,
   clib_memset (rmp, 0, sizeof (*rmp));
   rmp->_vl_msg_id =
     ntohs (VL_API_NAT44_IDENTITY_MAPPING_DETAILS + sm->msg_id_base);
-  rmp->addr_only = is_addr_only_static_mapping (m);
+
+  if (is_addr_only_static_mapping (m))
+    rmp->flags |= NAT_API_IS_ADDR_ONLY;
+
   clib_memcpy (rmp->ip_address, &(m->local_addr), 4);
   rmp->port = htons (m->local_port);
   rmp->sw_if_index = ~0;
@@ -1227,7 +1399,10 @@ send_nat44_identity_map_resolve_details (snat_static_map_resolve_t * m,
   clib_memset (rmp, 0, sizeof (*rmp));
   rmp->_vl_msg_id =
     ntohs (VL_API_NAT44_IDENTITY_MAPPING_DETAILS + sm->msg_id_base);
-  rmp->addr_only = m->addr_only;
+
+  if (m->addr_only)
+    rmp->flags = (vl_api_nat_config_flags_t) NAT_API_IS_ADDR_ONLY;
+
   rmp->port = htons (m->l_port);
   rmp->sw_if_index = htonl (m->sw_if_index);
   rmp->vrf_id = htonl (m->vrf_id);
@@ -1293,9 +1468,9 @@ static void
 {
   snat_main_t *sm = &snat_main;
   vl_api_nat44_add_del_interface_addr_reply_t *rmp;
-  u8 is_del = mp->is_add == 0;
   u32 sw_if_index = ntohl (mp->sw_if_index);
   int rv = 0;
+  u8 is_del;
 
   if (sm->deterministic)
     {
@@ -1303,9 +1478,12 @@ static void
       goto send_reply;
     }
 
+  is_del = !mp->is_add;
+
   VALIDATE_SW_IF_INDEX (mp);
 
-  rv = snat_add_interface_address (sm, sw_if_index, is_del, mp->twice_nat);
+  rv = snat_add_interface_address (sm, sw_if_index, is_del,
+                                  mp->flags & NAT_API_IS_TWICE_NAT);
 
   BAD_SW_IF_INDEX_LABEL;
 send_reply:
@@ -1320,7 +1498,7 @@ static void *vl_api_nat44_add_del_interface_addr_t_print
   s = format (0, "SCRIPT: nat44_add_del_interface_addr ");
   s = format (s, "sw_if_index %d twice_nat %d %s",
              clib_host_to_net_u32 (mp->sw_if_index),
-             mp->twice_nat, mp->is_add ? "" : "del");
+             mp->flags & NAT_API_IS_TWICE_NAT, mp->is_add ? "" : "del");
 
   FINISH;
 }
@@ -1338,7 +1516,9 @@ send_nat44_interface_addr_details (u32 sw_if_index,
   rmp->_vl_msg_id =
     ntohs (VL_API_NAT44_INTERFACE_ADDR_DETAILS + sm->msg_id_base);
   rmp->sw_if_index = ntohl (sw_if_index);
-  rmp->twice_nat = twice_nat;
+
+  if (twice_nat)
+    rmp->flags = (vl_api_nat_config_flags_t) NAT_API_IS_TWICE_NAT;
   rmp->context = context;
 
   vl_api_send_msg (reg, (u8 *) rmp);
@@ -1453,10 +1633,16 @@ send_nat44_user_session_details (snat_session_t * s,
     ntohs (VL_API_NAT44_USER_SESSION_DETAILS + sm->msg_id_base);
   clib_memcpy (rmp->outside_ip_address, (&s->out2in.addr), 4);
   clib_memcpy (rmp->inside_ip_address, (&s->in2out.addr), 4);
-  rmp->is_static = snat_is_session_static (s) ? 1 : 0;
-  rmp->is_twicenat = is_twice_nat_session (s) ? 1 : 0;
-  rmp->ext_host_valid = is_ed_session (s)
-    || is_fwd_bypass_session (s) ? 1 : 0;
+
+  if (snat_is_session_static (s))
+    rmp->flags |= NAT_API_IS_STATIC;
+
+  if (is_twice_nat_session (s))
+    rmp->flags |= NAT_API_IS_TWICE_NAT;
+
+  if (is_ed_session (s) || is_fwd_bypass_session (s))
+    rmp->flags |= NAT_API_IS_EXT_HOST_VALID;
+
   rmp->last_heard = clib_host_to_net_u64 ((u64) s->last_heard);
   rmp->total_bytes = clib_host_to_net_u64 (s->total_bytes);
   rmp->total_pkts = ntohl (s->total_pkts);
@@ -1516,29 +1702,43 @@ vl_api_nat44_user_session_dump_t_handler (vl_api_nat44_user_session_dump_t *
   if (sm->num_workers > 1)
     tsm =
       vec_elt_at_index (sm->per_thread_data,
-                       sm->worker_in2out_cb (&ip, ukey.fib_index));
+                       sm->worker_in2out_cb (&ip, ukey.fib_index, 0));
   else
     tsm = vec_elt_at_index (sm->per_thread_data, sm->num_workers);
-  if (clib_bihash_search_8_8 (&tsm->user_hash, &key, &value))
-    return;
-  u = pool_elt_at_index (tsm->users, value.value);
-  if (!u->nsessions && !u->nstaticsessions)
-    return;
-
-  head_index = u->sessions_per_user_list_head_index;
-  head = pool_elt_at_index (tsm->list_pool, head_index);
-  elt_index = head->next;
-  elt = pool_elt_at_index (tsm->list_pool, elt_index);
-  session_index = elt->value;
-  while (session_index != ~0)
+  if (!sm->endpoint_dependent)
     {
-      s = pool_elt_at_index (tsm->sessions, session_index);
-
-      send_nat44_user_session_details (s, reg, mp->context);
-
-      elt_index = elt->next;
+      if (clib_bihash_search_8_8 (&tsm->user_hash, &key, &value))
+       return;
+      u = pool_elt_at_index (tsm->users, value.value);
+      if (!u->nsessions && !u->nstaticsessions)
+       return;
+
+      head_index = u->sessions_per_user_list_head_index;
+      head = pool_elt_at_index (tsm->list_pool, head_index);
+      elt_index = head->next;
       elt = pool_elt_at_index (tsm->list_pool, elt_index);
       session_index = elt->value;
+      while (session_index != ~0)
+       {
+         s = pool_elt_at_index (tsm->sessions, session_index);
+
+         send_nat44_user_session_details (s, reg, mp->context);
+
+         elt_index = elt->next;
+         elt = pool_elt_at_index (tsm->list_pool, elt_index);
+         session_index = elt->value;
+       }
+    }
+  else
+    {
+      /* *INDENT-OFF* */
+      pool_foreach (s, tsm->sessions, {
+        if (s->in2out.addr.as_u32 == ukey.addr.as_u32)
+          {
+            send_nat44_user_session_details (s, reg, mp->context);
+          }
+      });
+      /* *INDENT-ON* */
     }
 }
 
@@ -1602,9 +1802,10 @@ static void
                                 clib_net_to_host_u32 (mp->local_num));
   clib_memcpy (&e_addr, mp->external_addr, 4);
   proto = ip_proto_to_snat_proto (mp->protocol);
-  if (mp->twice_nat)
+
+  if (mp->flags & NAT_API_IS_TWICE_NAT)
     twice_nat = TWICE_NAT;
-  else if (mp->self_twice_nat)
+  else if (mp->flags & NAT_API_IS_SELF_TWICE_NAT)
     twice_nat = TWICE_NAT_SELF;
   mp->tag[sizeof (mp->tag) - 1] = 0;
   tag = format (0, "%s", mp->tag);
@@ -1613,8 +1814,9 @@ static void
   rv =
     nat44_add_del_lb_static_mapping (e_addr,
                                     clib_net_to_host_u16 (mp->external_port),
-                                    proto, locals, mp->is_add, twice_nat,
-                                    mp->out2in_only, tag,
+                                    proto, locals, mp->is_add,
+                                    twice_nat,
+                                    mp->flags & NAT_API_IS_OUT2IN_ONLY, tag,
                                     clib_net_to_host_u32 (mp->affinity));
 
   vec_free (locals);
@@ -1631,7 +1833,9 @@ static void *vl_api_nat44_add_del_lb_static_mapping_t_print
 
   s = format (0, "SCRIPT: nat44_add_del_lb_static_mapping ");
   s = format (s, "is_add %d twice_nat %d out2in_only %d ",
-             mp->is_add, mp->twice_nat, mp->out2in_only);
+             mp->is_add,
+             mp->flags & NAT_API_IS_TWICE_NAT,
+             mp->flags & NAT_API_IS_OUT2IN_ONLY);
 
   FINISH;
 }
@@ -1705,11 +1909,13 @@ send_nat44_lb_static_mapping_details (snat_static_mapping_t * m,
   rmp->external_port = ntohs (m->external_port);
   rmp->protocol = snat_proto_to_ip_proto (m->proto);
   rmp->context = context;
+
   if (m->twice_nat == TWICE_NAT)
-    rmp->twice_nat = 1;
+    rmp->flags |= NAT_API_IS_TWICE_NAT;
   else if (m->twice_nat == TWICE_NAT_SELF)
-    rmp->self_twice_nat = 1;
-  rmp->out2in_only = is_out2in_only_static_mapping (m);
+    rmp->flags |= NAT_API_IS_SELF_TWICE_NAT;
+  if (is_out2in_only_static_mapping (m))
+    rmp->flags |= NAT_API_IS_OUT2IN_ONLY;
   if (m->tag)
     strncpy ((char *) rmp->tag, (char *) m->tag, vec_len (m->tag));
 
@@ -1773,6 +1979,7 @@ vl_api_nat44_del_session_t_handler (vl_api_nat44_del_session_t * mp)
   u16 port, eh_port;
   u32 vrf_id;
   int rv = 0;
+  u8 is_in;
   snat_protocol_t proto;
 
   if (sm->deterministic)
@@ -1788,12 +1995,14 @@ vl_api_nat44_del_session_t_handler (vl_api_nat44_del_session_t * mp)
   memcpy (&eh_addr.as_u8, mp->ext_host_address, 4);
   eh_port = clib_net_to_host_u16 (mp->ext_host_port);
 
-  if (mp->ext_host_valid)
+  is_in = mp->flags & NAT_API_IS_INSIDE;
+
+  if (mp->flags & NAT_API_IS_EXT_HOST_VALID)
     rv =
       nat44_del_ed_session (sm, &addr, port, &eh_addr, eh_port, mp->protocol,
-                           vrf_id, mp->is_in);
+                           vrf_id, is_in);
   else
-    rv = nat44_del_session (sm, &addr, port, proto, vrf_id, mp->is_in);
+    rv = nat44_del_session (sm, &addr, port, proto, vrf_id, is_in);
 
 send_reply:
   REPLY_MACRO (VL_API_NAT44_DEL_SESSION_REPLY);
@@ -1809,8 +2018,9 @@ vl_api_nat44_del_session_t_print (vl_api_nat44_del_session_t * mp,
   s = format (s, "addr %U port %d protocol %d vrf_id %d is_in %d",
              format_ip4_address, mp->address,
              clib_net_to_host_u16 (mp->port),
-             mp->protocol, clib_net_to_host_u32 (mp->vrf_id), mp->is_in);
-  if (mp->ext_host_valid)
+             mp->protocol, clib_net_to_host_u32 (mp->vrf_id),
+             mp->flags & NAT_API_IS_INSIDE);
+  if (mp->flags & NAT_API_IS_EXT_HOST_VALID)
     s = format (s, "ext_host_address %U ext_host_port %d",
                format_ip4_address, mp->ext_host_address,
                clib_net_to_host_u16 (mp->ext_host_port));
@@ -1843,12 +2053,21 @@ static void
               vec_add1 (ses_to_be_removed, s - tsm->sessions);
             }
         }));
-        vec_foreach (ses_index, ses_to_be_removed)
-        {
-          s = pool_elt_at_index(tsm->sessions, ses_index[0]);
-          nat_free_session_data (sm, s, tsm - sm->per_thread_data);
-          nat44_delete_session (sm, s, tsm - sm->per_thread_data);
-        }
+       if(sm->endpoint_dependent){
+           vec_foreach (ses_index, ses_to_be_removed)
+             {
+               s = pool_elt_at_index(tsm->sessions, ses_index[0]);
+               nat_free_session_data (sm, s, tsm - sm->per_thread_data, 0);
+               nat44_ed_delete_session (sm, s, tsm - sm->per_thread_data, 1);
+             }
+       }else{
+           vec_foreach (ses_index, ses_to_be_removed)
+             {
+               s = pool_elt_at_index(tsm->sessions, ses_index[0]);
+               nat_free_session_data (sm, s, tsm - sm->per_thread_data, 0);
+               nat44_delete_session (sm, s, tsm - sm->per_thread_data);
+             }
+       }
         vec_free (ses_to_be_removed);
       }
       /* *INDENT-ON* */
@@ -1919,12 +2138,6 @@ vl_api_nat_det_add_del_map_t_handler (vl_api_nat_det_add_del_map_t * mp)
       goto send_reply;
     }
 
-  if (!mp->is_nat44)
-    {
-      rv = VNET_API_ERROR_UNIMPLEMENTED;
-      goto send_reply;
-    }
-
   clib_memcpy (&in_addr, mp->in_addr, 4);
   clib_memcpy (&out_addr, mp->out_addr, 4);
   rv = snat_det_add_map (sm, &in_addr, mp->in_plen, &out_addr,
@@ -1965,13 +2178,6 @@ vl_api_nat_det_forward_t_handler (vl_api_nat_det_forward_t * mp)
       return;
     }
 
-  if (!mp->is_nat44)
-    {
-      out_addr.as_u32 = 0;
-      rv = VNET_API_ERROR_UNIMPLEMENTED;
-      goto send_reply;
-    }
-
   out_addr.as_u32 = 0;
   clib_memcpy (&in_addr, mp->in_addr, 4);
   dm = snat_det_map_by_user (sm, &in_addr);
@@ -2037,8 +2243,6 @@ send_reply:
   /* *INDENT-OFF* */
   REPLY_MACRO2 (VL_API_NAT_DET_REVERSE_REPLY,
   ({
-    rmp->is_nat44 = 1;
-    clib_memset (rmp->in_addr, 0, 16);
     clib_memcpy (rmp->in_addr, &in_addr, 4);
   }))
   /* *INDENT-ON* */
@@ -2066,7 +2270,6 @@ sent_nat_det_map_details (snat_det_map_t * m, vl_api_registration_t * reg,
   rmp = vl_msg_api_alloc (sizeof (*rmp));
   clib_memset (rmp, 0, sizeof (*rmp));
   rmp->_vl_msg_id = ntohs (VL_API_NAT_DET_MAP_DETAILS + sm->msg_id_base);
-  rmp->is_nat44 = 1;
   clib_memcpy (rmp->in_addr, &m->in_addr, 4);
   rmp->in_plen = m->in_plen;
   clib_memcpy (rmp->out_addr, &m->out_addr, 4);
@@ -2185,12 +2388,6 @@ vl_api_nat_det_close_session_in_t_handler (vl_api_nat_det_close_session_in_t *
       goto send_reply;
     }
 
-  if (!mp->is_nat44)
-    {
-      rv = VNET_API_ERROR_UNIMPLEMENTED;
-      goto send_reply;
-    }
-
   clib_memcpy (&in_addr, mp->in_addr, 4);
   clib_memcpy (&ext_addr, mp->ext_addr, 4);
 
@@ -2264,8 +2461,6 @@ vl_api_nat_det_session_dump_t_handler (vl_api_nat_det_session_dump_t * mp)
   reg = vl_api_client_index_to_registration (mp->client_index);
   if (!reg)
     return;
-  if (!mp->is_nat44)
-    return;
 
   clib_memset (&empty_ses, 0, sizeof (empty_ses));
   clib_memcpy (&user_addr, mp->user_addr, 4);
@@ -2324,8 +2519,7 @@ static void
 
   for (i = 0; i < count; i++)
     {
-      if ((rv = nat64_add_del_pool_addr (vlib_get_thread_index (),
-                                        &this_addr, vrf_id, mp->is_add)))
+      if ((rv = nat64_add_del_pool_addr (0, &this_addr, vrf_id, mp->is_add)))
        goto send_reply;
 
       increment_v4_address (&this_addr);
@@ -2422,8 +2616,8 @@ vl_api_nat64_add_del_interface_t_handler (vl_api_nat64_add_del_interface_t *
   VALIDATE_SW_IF_INDEX (mp);
 
   rv =
-    nat64_add_del_interface (ntohl (mp->sw_if_index), mp->is_inside,
-                            mp->is_add);
+    nat64_add_del_interface (ntohl (mp->sw_if_index),
+                            mp->flags & NAT_API_IS_INSIDE, mp->is_add);
 
   BAD_SW_IF_INDEX_LABEL;
 
@@ -2439,7 +2633,8 @@ vl_api_nat64_add_del_interface_t_print (vl_api_nat64_add_del_interface_t * mp,
   s = format (0, "SCRIPT: nat64_add_del_interface ");
   s = format (s, "sw_if_index %d %s %s",
              clib_host_to_net_u32 (mp->sw_if_index),
-             mp->is_inside ? "in" : "out", mp->is_add ? "" : "del");
+             mp->flags & NAT_API_IS_INSIDE ? "in" : "out",
+             mp->is_add ? "" : "del");
 
   FINISH;
 }
@@ -2455,9 +2650,12 @@ nat64_api_interface_walk (snat_interface_t * i, void *arg)
   clib_memset (rmp, 0, sizeof (*rmp));
   rmp->_vl_msg_id = ntohs (VL_API_NAT64_INTERFACE_DETAILS + sm->msg_id_base);
   rmp->sw_if_index = ntohl (i->sw_if_index);
-  rmp->is_inside = (nat_interface_is_inside (i)
-                   && nat_interface_is_outside (i)) ? 2 :
-    nat_interface_is_inside (i);
+
+  if (nat_interface_is_inside (i))
+    rmp->flags |= NAT_API_IS_INSIDE;
+  if (nat_interface_is_outside (i))
+    rmp->flags |= NAT_API_IS_OUTSIDE;
+
   rmp->context = ctx->context;
 
   vl_api_send_msg (ctx->reg, (u8 *) rmp);
@@ -2555,7 +2753,8 @@ nat64_api_bib_walk (nat64_db_bib_entry_t * bibe, void *arg)
   rmp->o_port = bibe->out_port;
   rmp->vrf_id = ntohl (fib->ft_table_id);
   rmp->proto = bibe->proto;
-  rmp->is_static = bibe->is_static;
+  if (bibe->is_static)
+    rmp->flags |= NAT_API_IS_STATIC;
   rmp->ses_num = ntohl (bibe->ses_num);
 
   vl_api_send_msg (ctx->reg, (u8 *) rmp);
@@ -2674,10 +2873,10 @@ vl_api_nat64_add_del_prefix_t_handler (vl_api_nat64_add_del_prefix_t * mp)
   ip6_address_t prefix;
   int rv = 0;
 
-  memcpy (&prefix.as_u8, mp->prefix, 16);
+  memcpy (&prefix.as_u8, mp->prefix.address, 16);
 
   rv =
-    nat64_add_del_prefix (&prefix, mp->prefix_len,
+    nat64_add_del_prefix (&prefix, mp->prefix.len,
                          clib_net_to_host_u32 (mp->vrf_id), mp->is_add);
   REPLY_MACRO (VL_API_NAT64_ADD_DEL_PREFIX_REPLY);
 }
@@ -2689,7 +2888,7 @@ vl_api_nat64_add_del_prefix_t_print (vl_api_nat64_add_del_prefix_t * mp,
   u8 *s;
 
   s = format (0, "SCRIPT: nat64_add_del_prefix %U/%u vrf_id %u %s\n",
-             format_ip6_address, mp->prefix, mp->prefix_len,
+             format_ip6_address, mp->prefix.address, mp->prefix.len,
              ntohl (mp->vrf_id), mp->is_add ? "" : "del");
 
   FINISH;
@@ -2705,8 +2904,8 @@ nat64_api_prefix_walk (nat64_prefix_t * p, void *arg)
   rmp = vl_msg_api_alloc (sizeof (*rmp));
   clib_memset (rmp, 0, sizeof (*rmp));
   rmp->_vl_msg_id = ntohs (VL_API_NAT64_PREFIX_DETAILS + sm->msg_id_base);
-  clib_memcpy (rmp->prefix, &(p->prefix), 16);
-  rmp->prefix_len = p->plen;
+  clib_memcpy (rmp->prefix.address, &(p->prefix), 16);
+  rmp->prefix.len = p->plen;
   rmp->vrf_id = ntohl (p->vrf_id);
   rmp->context = ctx->context;
 
@@ -2774,229 +2973,6 @@ static void *vl_api_nat64_add_del_interface_addr_t_print
   FINISH;
 }
 
-/***************/
-/*** DS-Lite ***/
-/***************/
-
-static void
-vl_api_dslite_set_aftr_addr_t_handler (vl_api_dslite_set_aftr_addr_t * mp)
-{
-  vl_api_dslite_set_aftr_addr_reply_t *rmp;
-  snat_main_t *sm = &snat_main;
-  dslite_main_t *dm = &dslite_main;
-  int rv = 0;
-  ip6_address_t ip6_addr;
-  ip4_address_t ip4_addr;
-
-  memcpy (&ip6_addr.as_u8, mp->ip6_addr, 16);
-  memcpy (&ip4_addr.as_u8, mp->ip4_addr, 4);
-
-  rv = dslite_set_aftr_ip6_addr (dm, &ip6_addr);
-  if (rv == 0)
-    rv = dslite_set_aftr_ip4_addr (dm, &ip4_addr);
-
-  REPLY_MACRO (VL_API_DSLITE_SET_AFTR_ADDR_REPLY);
-}
-
-static void *
-vl_api_dslite_set_aftr_addr_t_print (vl_api_dslite_set_aftr_addr_t * mp,
-                                    void *handle)
-{
-  u8 *s;
-
-  s = format (0, "SCRIPT: dslite_set_aftr_addr ");
-  s = format (s, "ip6_addr %U ip4_addr %U\n",
-             format_ip6_address, mp->ip6_addr,
-             format_ip4_address, mp->ip4_addr);
-
-  FINISH;
-}
-
-static void
-vl_api_dslite_get_aftr_addr_t_handler (vl_api_dslite_get_aftr_addr_t * mp)
-{
-  snat_main_t *sm = &snat_main;
-  vl_api_dslite_get_aftr_addr_reply_t *rmp;
-  dslite_main_t *dm = &dslite_main;
-  int rv = 0;
-
-  /* *INDENT-OFF* */
-  REPLY_MACRO2 (VL_API_DSLITE_GET_AFTR_ADDR_REPLY,
-  ({
-    memcpy (rmp->ip4_addr, &dm->aftr_ip4_addr.as_u8, 4);
-    memcpy (rmp->ip6_addr, &dm->aftr_ip6_addr.as_u8, 16);
-  }))
-  /* *INDENT-ON* */
-}
-
-static void *
-vl_api_dslite_get_aftr_addr_t_print (vl_api_dslite_get_aftr_addr_t * mp,
-                                    void *handle)
-{
-  u8 *s;
-
-  s = format (0, "SCRIPT: dslite_get_aftr_addr");
-
-  FINISH;
-}
-
-static void
-vl_api_dslite_set_b4_addr_t_handler (vl_api_dslite_set_b4_addr_t * mp)
-{
-  vl_api_dslite_set_b4_addr_reply_t *rmp;
-  snat_main_t *sm = &snat_main;
-  dslite_main_t *dm = &dslite_main;
-  int rv = 0;
-  ip6_address_t ip6_addr;
-  ip4_address_t ip4_addr;
-
-  memcpy (&ip6_addr.as_u8, mp->ip6_addr, 16);
-  memcpy (&ip4_addr.as_u8, mp->ip4_addr, 4);
-
-  rv = dslite_set_b4_ip6_addr (dm, &ip6_addr);
-  if (rv == 0)
-    rv = dslite_set_b4_ip4_addr (dm, &ip4_addr);
-
-  REPLY_MACRO (VL_API_DSLITE_SET_B4_ADDR_REPLY);
-}
-
-static void *
-vl_api_dslite_set_b4_addr_t_print (vl_api_dslite_set_b4_addr_t * mp,
-                                  void *handle)
-{
-  u8 *s;
-
-  s = format (0, "SCRIPT: dslite_set_b4_addr ");
-  s = format (s, "ip6_addr %U ip4_addr %U\n",
-             format_ip6_address, mp->ip6_addr,
-             format_ip6_address, mp->ip4_addr);
-
-  FINISH;
-}
-
-static void
-vl_api_dslite_get_b4_addr_t_handler (vl_api_dslite_get_b4_addr_t * mp)
-{
-  snat_main_t *sm = &snat_main;
-  vl_api_dslite_get_b4_addr_reply_t *rmp;
-  dslite_main_t *dm = &dslite_main;
-  int rv = 0;
-
-  /* *INDENT-OFF* */
-  REPLY_MACRO2 (VL_API_DSLITE_GET_AFTR_ADDR_REPLY,
-  ({
-    memcpy (rmp->ip4_addr, &dm->b4_ip4_addr.as_u8, 4);
-    memcpy (rmp->ip6_addr, &dm->b4_ip6_addr.as_u8, 16);
-  }))
-  /* *INDENT-ON* */
-}
-
-static void *
-vl_api_dslite_get_b4_addr_t_print (vl_api_dslite_get_b4_addr_t * mp,
-                                  void *handle)
-{
-  u8 *s;
-
-  s = format (0, "SCRIPT: dslite_get_b4_addr");
-
-  FINISH;
-}
-
-static void
-  vl_api_dslite_add_del_pool_addr_range_t_handler
-  (vl_api_dslite_add_del_pool_addr_range_t * mp)
-{
-  vl_api_dslite_add_del_pool_addr_range_reply_t *rmp;
-  snat_main_t *sm = &snat_main;
-  dslite_main_t *dm = &dslite_main;
-  int rv = 0;
-  ip4_address_t this_addr;
-  u32 start_host_order, end_host_order;
-  int i, count;
-  u32 *tmp;
-
-  tmp = (u32 *) mp->start_addr;
-  start_host_order = clib_host_to_net_u32 (tmp[0]);
-  tmp = (u32 *) mp->end_addr;
-  end_host_order = clib_host_to_net_u32 (tmp[0]);
-
-  count = (end_host_order - start_host_order) + 1;
-  memcpy (&this_addr.as_u8, mp->start_addr, 4);
-
-  for (i = 0; i < count; i++)
-    {
-      if ((rv = dslite_add_del_pool_addr (dm, &this_addr, mp->is_add)))
-       goto send_reply;
-
-      increment_v4_address (&this_addr);
-    }
-
-send_reply:
-  REPLY_MACRO (VL_API_DSLITE_ADD_DEL_POOL_ADDR_RANGE_REPLY);
-}
-
-static void
-send_dslite_address_details (snat_address_t * ap,
-                            vl_api_registration_t * reg, u32 context)
-{
-  vl_api_dslite_address_details_t *rmp;
-  snat_main_t *sm = &snat_main;
-
-  rmp = vl_msg_api_alloc (sizeof (*rmp));
-
-  clib_memset (rmp, 0, sizeof (*rmp));
-
-  rmp->_vl_msg_id = ntohs (VL_API_DSLITE_ADDRESS_DETAILS + sm->msg_id_base);
-  clib_memcpy (rmp->ip_address, &(ap->addr), 4);
-  rmp->context = context;
-
-  vl_api_send_msg (reg, (u8 *) rmp);
-}
-
-static void
-vl_api_dslite_address_dump_t_handler (vl_api_dslite_address_dump_t * mp)
-{
-  vl_api_registration_t *reg;
-  dslite_main_t *dm = &dslite_main;
-  snat_address_t *ap;
-
-  reg = vl_api_client_index_to_registration (mp->client_index);
-  if (!reg)
-    return;
-
-  /* *INDENT-OFF* */
-  vec_foreach (ap, dm->addr_pool)
-    {
-      send_dslite_address_details (ap, reg, mp->context);
-    }
-  /* *INDENT-ON* */
-}
-
-static void *
-vl_api_dslite_address_dump_t_print (vl_api_dslite_address_dump_t * mp,
-                                   void *handle)
-{
-  u8 *s;
-
-  s = format (0, "SCRIPT: dslite_address_dump ");
-
-  FINISH;
-}
-
-static void *vl_api_dslite_add_del_pool_addr_range_t_print
-  (vl_api_dslite_add_del_pool_addr_range_t * mp, void *handle)
-{
-  u8 *s;
-
-  s = format (0, "SCRIPT: dslite_add_del_pool_addr_range ");
-  s = format (s, "%U - %U\n",
-             format_ip4_address, mp->start_addr,
-             format_ip4_address, mp->end_addr);
-
-  FINISH;
-}
-
-
 /*************/
 /*** NAT66 ***/
 /*************/
@@ -3012,8 +2988,8 @@ vl_api_nat66_add_del_interface_t_handler (vl_api_nat66_add_del_interface_t *
   VALIDATE_SW_IF_INDEX (mp);
 
   rv =
-    nat66_interface_add_del (ntohl (mp->sw_if_index), mp->is_inside,
-                            mp->is_add);
+    nat66_interface_add_del (ntohl (mp->sw_if_index),
+                            mp->flags & NAT_API_IS_INSIDE, mp->is_add);
 
   BAD_SW_IF_INDEX_LABEL;
 
@@ -3029,7 +3005,8 @@ vl_api_nat66_add_del_interface_t_print (vl_api_nat66_add_del_interface_t * mp,
   s = format (0, "SCRIPT: nat66_add_del_interface ");
   s = format (s, "sw_if_index %d %s %s",
              clib_host_to_net_u32 (mp->sw_if_index),
-             mp->is_inside ? "in" : "out", mp->is_add ? "" : "del");
+             mp->flags & NAT_API_IS_INSIDE ? "in" : "out",
+             mp->is_add ? "" : "del");
 
   FINISH;
 }
@@ -3070,7 +3047,7 @@ static void *vl_api_nat66_add_del_static_mapping_t_print
 
 typedef struct nat66_api_walk_ctx_t_
 {
-  svm_queue_t *q;
+  vl_api_registration_t *rp;
   u32 context;
 } nat66_api_walk_ctx_t;
 
@@ -3085,10 +3062,11 @@ nat66_api_interface_walk (snat_interface_t * i, void *arg)
   clib_memset (rmp, 0, sizeof (*rmp));
   rmp->_vl_msg_id = ntohs (VL_API_NAT66_INTERFACE_DETAILS + sm->msg_id_base);
   rmp->sw_if_index = ntohl (i->sw_if_index);
-  rmp->is_inside = nat_interface_is_inside (i);
+  if (nat_interface_is_inside (i))
+    rmp->flags |= NAT_API_IS_INSIDE;
   rmp->context = ctx->context;
 
-  vl_msg_api_send_shmem (ctx->q, (u8 *) & rmp);
+  vl_api_send_msg (ctx->rp, (u8 *) rmp);
 
   return 0;
 }
@@ -3096,14 +3074,14 @@ nat66_api_interface_walk (snat_interface_t * i, void *arg)
 static void
 vl_api_nat66_interface_dump_t_handler (vl_api_nat66_interface_dump_t * mp)
 {
-  svm_queue_t *q;
+  vl_api_registration_t *rp;
 
-  q = vl_api_client_index_to_input_queue (mp->client_index);
-  if (q == 0)
+  rp = vl_api_client_index_to_registration (mp->client_index);
+  if (rp == 0)
     return;
 
   nat66_api_walk_ctx_t ctx = {
-    .q = q,
+    .rp = rp,
     .context = mp->context,
   };
 
@@ -3148,7 +3126,7 @@ nat66_api_static_mapping_walk (nat66_static_mapping_t * m, void *arg)
   rmp->total_pkts = clib_host_to_net_u64 (vc.packets);
   rmp->context = ctx->context;
 
-  vl_msg_api_send_shmem (ctx->q, (u8 *) & rmp);
+  vl_api_send_msg (ctx->rp, (u8 *) rmp);
 
   return 0;
 }
@@ -3157,14 +3135,14 @@ static void
 vl_api_nat66_static_mapping_dump_t_handler (vl_api_nat66_static_mapping_dump_t
                                            * mp)
 {
-  svm_queue_t *q;
+  vl_api_registration_t *rp;
 
-  q = vl_api_client_index_to_input_queue (mp->client_index);
-  if (q == 0)
+  rp = vl_api_client_index_to_registration (mp->client_index);
+  if (rp == 0)
     return;
 
   nat66_api_walk_ctx_t ctx = {
-    .q = q,
+    .rp = rp,
     .context = mp->context,
   };
 
@@ -3189,16 +3167,22 @@ _(NAT_CONTROL_PING, nat_control_ping)                                   \
 _(NAT_SHOW_CONFIG, nat_show_config)                                     \
 _(NAT_SET_WORKERS, nat_set_workers)                                     \
 _(NAT_WORKER_DUMP, nat_worker_dump)                                     \
+_(NAT44_DEL_USER, nat44_del_user)                                       \
+_(NAT44_SET_SESSION_LIMIT, nat44_set_session_limit)                     \
+_(NAT_SET_LOG_LEVEL, nat_set_log_level)                                 \
 _(NAT_IPFIX_ENABLE_DISABLE, nat_ipfix_enable_disable)                   \
-_(NAT_SET_REASS, nat_set_reass)                                         \
-_(NAT_GET_REASS, nat_get_reass)                                         \
-_(NAT_REASS_DUMP, nat_reass_dump)                                       \
 _(NAT_SET_TIMEOUTS, nat_set_timeouts)                                   \
 _(NAT_GET_TIMEOUTS, nat_get_timeouts)                                   \
 _(NAT_SET_ADDR_AND_PORT_ALLOC_ALG, nat_set_addr_and_port_alloc_alg)     \
 _(NAT_GET_ADDR_AND_PORT_ALLOC_ALG, nat_get_addr_and_port_alloc_alg)     \
 _(NAT_SET_MSS_CLAMPING, nat_set_mss_clamping)                           \
 _(NAT_GET_MSS_CLAMPING, nat_get_mss_clamping)                           \
+_(NAT_HA_SET_LISTENER, nat_ha_set_listener)                             \
+_(NAT_HA_SET_FAILOVER, nat_ha_set_failover)                             \
+_(NAT_HA_GET_LISTENER, nat_ha_get_listener)                             \
+_(NAT_HA_GET_FAILOVER, nat_ha_get_failover)                             \
+_(NAT_HA_FLUSH, nat_ha_flush)                                           \
+_(NAT_HA_RESYNC, nat_ha_resync)                                         \
 _(NAT44_ADD_DEL_ADDRESS_RANGE, nat44_add_del_address_range)             \
 _(NAT44_INTERFACE_ADD_DEL_FEATURE, nat44_interface_add_del_feature)     \
 _(NAT44_ADD_DEL_STATIC_MAPPING, nat44_add_del_static_mapping)           \
@@ -3239,12 +3223,6 @@ _(NAT64_ST_DUMP, nat64_st_dump)                                         \
 _(NAT64_ADD_DEL_PREFIX, nat64_add_del_prefix)                           \
 _(NAT64_PREFIX_DUMP, nat64_prefix_dump)                                 \
 _(NAT64_ADD_DEL_INTERFACE_ADDR, nat64_add_del_interface_addr)           \
-_(DSLITE_ADD_DEL_POOL_ADDR_RANGE, dslite_add_del_pool_addr_range)       \
-_(DSLITE_ADDRESS_DUMP, dslite_address_dump)                            \
-_(DSLITE_SET_AFTR_ADDR, dslite_set_aftr_addr)                           \
-_(DSLITE_GET_AFTR_ADDR, dslite_get_aftr_addr)                           \
-_(DSLITE_SET_B4_ADDR, dslite_set_b4_addr)                               \
-_(DSLITE_GET_B4_ADDR, dslite_get_b4_addr)                               \
 _(NAT66_ADD_DEL_INTERFACE, nat66_add_del_interface)                     \
 _(NAT66_INTERFACE_DUMP, nat66_interface_dump)                           \
 _(NAT66_ADD_DEL_STATIC_MAPPING, nat66_add_del_static_mapping)           \