SNAT: move API code to separate file

Move API source code from snat.c to snat_api.c

Change-Id: I1c4439eb5d2e3f43695ecc4d300eccd148105c15
Signed-off-by: Matus Fabian <matfabia@cisco.com>

1 files changed, 1296 insertions, 0 deletions

diff --git a/src/plugins/snat/snat_api.c b/src/plugins/snat/snat_api.c
new file mode 100644
index 00000000000..64532c8f279
--- /dev/null
+++ b/src/plugins/snat/snat_api.c
@@ -0,0 +1,1296 @@
+/*
+ * Copyright (c) 2017 Cisco and/or its affiliates.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+/**
+ * @file
+ * @brief SNAT plugin API implementation
+ */
+
+#include <snat/snat.h>
+#include <snat/snat_det.h>
+#include <vlibapi/api.h>
+#include <vlibmemory/api.h>
+#include <vlibsocket/api.h>
+#include <snat/snat_msg_enum.h>
+#include <vnet/fib/ip4_fib.h>
+
+/* define message structures */
+#define vl_typedefs
+#include <snat/snat_all_api_h.h>
+#undef vl_typedefs
+
+/* define generated endian-swappers */
+#define vl_endianfun
+#include <snat/snat_all_api_h.h>
+#undef vl_endianfun
+
+#define vl_print(handle, ...) vlib_cli_output (handle, __VA_ARGS__)
+
+#define REPLY_MSG_ID_BASE sm->msg_id_base
+#include <vlibapi/api_helper_macros.h>
+
+/* Get the API version number */
+#define vl_api_version(n,v) static u32 api_version=(v);
+#include <snat/snat_all_api_h.h>
+#undef vl_api_version
+
+/* Macro to finish up custom dump fns */
+#define FINISH                                  \
+    vec_add1 (s, 0);                            \
+    vl_print (handle, (char *)s);               \
+    vec_free (s);                               \
+    return handle;
+
+static void
+  vl_api_snat_add_address_range_t_handler
+  (vl_api_snat_add_address_range_t * mp)
+{
+  snat_main_t *sm = &snat_main;
+  vl_api_snat_add_address_range_reply_t *rmp;
+  ip4_address_t this_addr;
+  u32 start_host_order, end_host_order;
+  u32 vrf_id;
+  int i, count;
+  int rv = 0;
+  u32 *tmp;
+
+  if (mp->is_ip4 != 1)
+    {
+      rv = VNET_API_ERROR_UNIMPLEMENTED;
+      goto send_reply;
+    }
+
+  if (sm->static_mapping_only)
+    {
+      rv = VNET_API_ERROR_FEATURE_DISABLED;
+      goto send_reply;
+    }
+
+  tmp = (u32 *) mp->first_ip_address;
+  start_host_order = clib_host_to_net_u32 (tmp[0]);
+  tmp = (u32 *) mp->last_ip_address;
+  end_host_order = clib_host_to_net_u32 (tmp[0]);
+
+  count = (end_host_order - start_host_order) + 1;
+
+  vrf_id = clib_host_to_net_u32 (mp->vrf_id);
+
+  if (count > 1024)
+    clib_warning ("%U - %U, %d addresses...",
+		  format_ip4_address, mp->first_ip_address,
+		  format_ip4_address, mp->last_ip_address, count);
+
+  memcpy (&this_addr.as_u8, mp->first_ip_address, 4);
+
+  for (i = 0; i < count; i++)
+    {
+      if (mp->is_add)
+	snat_add_address (sm, &this_addr, vrf_id);
+      else
+	rv = snat_del_address (sm, this_addr, 0);
+
+      if (rv)
+	goto send_reply;
+
+      increment_v4_address (&this_addr);
+    }
+
+send_reply:
+  REPLY_MACRO (VL_API_SNAT_ADD_ADDRESS_RANGE_REPLY);
+}
+
+static void *vl_api_snat_add_address_range_t_print
+  (vl_api_snat_add_address_range_t * mp, void *handle)
+{
+  u8 *s;
+
+  s = format (0, "SCRIPT: snat_add_address_range ");
+  s = format (s, "%U ", format_ip4_address, mp->first_ip_address);
+  if (memcmp (mp->first_ip_address, mp->last_ip_address, 4))
+    {
+      s = format (s, " - %U ", format_ip4_address, mp->last_ip_address);
+    }
+  FINISH;
+}
+
+static void
+  send_snat_address_details
+  (snat_address_t * a, unix_shared_memory_queue_t * q, u32 context)
+{
+  vl_api_snat_address_details_t *rmp;
+  snat_main_t *sm = &snat_main;
+
+  rmp = vl_msg_api_alloc (sizeof (*rmp));
+  memset (rmp, 0, sizeof (*rmp));
+  rmp->_vl_msg_id = ntohs (VL_API_SNAT_ADDRESS_DETAILS + sm->msg_id_base);
+  rmp->is_ip4 = 1;
+  clib_memcpy (rmp->ip_address, &(a->addr), 4);
+  if (a->fib_index != ~0)
+    rmp->vrf_id = ntohl (ip4_fib_get (a->fib_index)->table_id);
+  else
+    rmp->vrf_id = ~0;
+  rmp->context = context;
+
+  vl_msg_api_send_shmem (q, (u8 *) & rmp);
+}
+
+static void
+vl_api_snat_address_dump_t_handler (vl_api_snat_address_dump_t * mp)
+{
+  unix_shared_memory_queue_t *q;
+  snat_main_t *sm = &snat_main;
+  snat_address_t *a;
+
+  q = vl_api_client_index_to_input_queue (mp->client_index);
+  if (q == 0)
+    return;
+
+  /* *INDENT-OFF* */
+  vec_foreach (a, sm->addresses)
+    send_snat_address_details (a, q, mp->context);
+  /* *INDENT-ON* */
+}
+
+static void *vl_api_snat_address_dump_t_print
+  (vl_api_snat_address_dump_t * mp, void *handle)
+{
+  u8 *s;
+
+  s = format (0, "SCRIPT: snat_address_dump ");
+
+  FINISH;
+}
+
+static void
+  vl_api_snat_interface_add_del_feature_t_handler
+  (vl_api_snat_interface_add_del_feature_t * mp)
+{
+  snat_main_t *sm = &snat_main;
+  vl_api_snat_interface_add_del_feature_reply_t *rmp;
+  u8 is_del = mp->is_add == 0;
+  u32 sw_if_index = ntohl (mp->sw_if_index);
+  int rv = 0;
+
+  VALIDATE_SW_IF_INDEX (mp);
+
+  rv = snat_interface_add_del (sw_if_index, mp->is_inside, is_del);
+
+  BAD_SW_IF_INDEX_LABEL;
+
+  REPLY_MACRO (VL_API_SNAT_INTERFACE_ADD_DEL_FEATURE_REPLY);
+}
+
+static void *vl_api_snat_interface_add_del_feature_t_print
+  (vl_api_snat_interface_add_del_feature_t * mp, void *handle)
+{
+  u8 *s;
+
+  s = format (0, "SCRIPT: snat_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");
+
+  FINISH;
+}
+
+static void
+  send_snat_interface_details
+  (snat_interface_t * i, unix_shared_memory_queue_t * q, u32 context)
+{
+  vl_api_snat_interface_details_t *rmp;
+  snat_main_t *sm = &snat_main;
+
+  rmp = vl_msg_api_alloc (sizeof (*rmp));
+  memset (rmp, 0, sizeof (*rmp));
+  rmp->_vl_msg_id = ntohs (VL_API_SNAT_INTERFACE_DETAILS + sm->msg_id_base);
+  rmp->sw_if_index = ntohl (i->sw_if_index);
+  rmp->is_inside = i->is_inside;
+  rmp->context = context;
+
+  vl_msg_api_send_shmem (q, (u8 *) & rmp);
+}
+
+static void
+vl_api_snat_interface_dump_t_handler (vl_api_snat_interface_dump_t * mp)
+{
+  unix_shared_memory_queue_t *q;
+  snat_main_t *sm = &snat_main;
+  snat_interface_t *i;
+
+  q = vl_api_client_index_to_input_queue (mp->client_index);
+  if (q == 0)
+    return;
+
+  /* *INDENT-OFF* */
+  pool_foreach (i, sm->interfaces,
+  ({
+    send_snat_interface_details(i, q, mp->context);
+  }));
+  /* *INDENT-ON* */
+}
+
+static void *vl_api_snat_interface_dump_t_print
+  (vl_api_snat_interface_dump_t * mp, void *handle)
+{
+  u8 *s;
+
+  s = format (0, "SCRIPT: snat_interface_dump ");
+
+  FINISH;
+} static void
+  vl_api_snat_add_static_mapping_t_handler
+  (vl_api_snat_add_static_mapping_t * mp)
+{
+  snat_main_t *sm = &snat_main;
+  vl_api_snat_add_static_mapping_reply_t *rmp;
+  ip4_address_t local_addr, external_addr;
+  u16 local_port = 0, external_port = 0;
+  u32 vrf_id, external_sw_if_index;
+  int rv = 0;
+  snat_protocol_t proto;
+
+  if (mp->is_ip4 != 1)
+    {
+      rv = VNET_API_ERROR_UNIMPLEMENTED;
+      goto send_reply;
+    }
+
+  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)
+    {
+      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);
+
+  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);
+
+send_reply:
+  REPLY_MACRO (VL_API_SNAT_ADD_ADDRESS_RANGE_REPLY);
+}
+
+static void *vl_api_snat_add_static_mapping_t_print
+  (vl_api_snat_add_static_mapping_t * mp, void *handle)
+{
+  u8 *s;
+
+  s = format (0, "SCRIPT: snat_add_static_mapping ");
+  s = format (s, "protocol %d local_addr %U external_addr %U ",
+	      mp->protocol,
+	      format_ip4_address, mp->local_ip_address,
+	      format_ip4_address, mp->external_ip_address);
+
+  if (mp->addr_only == 0)
+    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));
+
+  if (mp->vrf_id != ~0)
+    s = format (s, "vrf %d", clib_net_to_host_u32 (mp->vrf_id));
+
+  if (mp->external_sw_if_index != ~0)
+    s = format (s, "external_sw_if_index %d",
+		clib_net_to_host_u32 (mp->external_sw_if_index));
+  FINISH;
+}
+
+static void
+  send_snat_static_mapping_details
+  (snat_static_mapping_t * m, unix_shared_memory_queue_t * q, u32 context)
+{
+  vl_api_snat_static_mapping_details_t *rmp;
+  snat_main_t *sm = &snat_main;
+
+  rmp = vl_msg_api_alloc (sizeof (*rmp));
+  memset (rmp, 0, sizeof (*rmp));
+  rmp->_vl_msg_id =
+    ntohs (VL_API_SNAT_STATIC_MAPPING_DETAILS + sm->msg_id_base);
+  rmp->is_ip4 = 1;
+  rmp->addr_only = m->addr_only;
+  clib_memcpy (rmp->local_ip_address, &(m->local_addr), 4);
+  clib_memcpy (rmp->external_ip_address, &(m->external_addr), 4);
+  rmp->local_port = htons (m->local_port);
+  rmp->external_port = htons (m->external_port);
+  rmp->external_sw_if_index = ~0;
+  rmp->vrf_id = htonl (m->vrf_id);
+  rmp->protocol = snat_proto_to_ip_proto (m->proto);
+  rmp->context = context;
+
+  vl_msg_api_send_shmem (q, (u8 *) & rmp);
+}
+
+static void
+  send_snat_static_map_resolve_details
+  (snat_static_map_resolve_t * m, unix_shared_memory_queue_t * q, u32 context)
+{
+  vl_api_snat_static_mapping_details_t *rmp;
+  snat_main_t *sm = &snat_main;
+
+  rmp = vl_msg_api_alloc (sizeof (*rmp));
+  memset (rmp, 0, sizeof (*rmp));
+  rmp->_vl_msg_id =
+    ntohs (VL_API_SNAT_STATIC_MAPPING_DETAILS + sm->msg_id_base);
+  rmp->is_ip4 = 1;
+  rmp->addr_only = m->addr_only;
+  clib_memcpy (rmp->local_ip_address, &(m->l_addr), 4);
+  rmp->local_port = htons (m->l_port);
+  rmp->external_port = htons (m->e_port);
+  rmp->external_sw_if_index = htonl (m->sw_if_index);
+  rmp->vrf_id = htonl (m->vrf_id);
+  rmp->protocol = snat_proto_to_ip_proto (m->proto);
+  rmp->context = context;
+
+  vl_msg_api_send_shmem (q, (u8 *) & rmp);
+}
+
+static void
+  vl_api_snat_static_mapping_dump_t_handler
+  (vl_api_snat_static_mapping_dump_t * mp)
+{
+  unix_shared_memory_queue_t *q;
+  snat_main_t *sm = &snat_main;
+  snat_static_mapping_t *m;
+  snat_static_map_resolve_t *rp;
+  int j;
+
+  q = vl_api_client_index_to_input_queue (mp->client_index);
+  if (q == 0)
+    return;
+
+  /* *INDENT-OFF* */
+  pool_foreach (m, sm->static_mappings,
+  ({
+      send_snat_static_mapping_details (m, q, mp->context);
+  }));
+  /* *INDENT-ON* */
+
+  for (j = 0; j < vec_len (sm->to_resolve); j++)
+    {
+      rp = sm->to_resolve + j;
+      send_snat_static_map_resolve_details (rp, q, mp->context);
+    }
+}
+
+static void *vl_api_snat_static_mapping_dump_t_print
+  (vl_api_snat_static_mapping_dump_t * mp, void *handle)
+{
+  u8 *s;
+
+  s = format (0, "SCRIPT: snat_static_mapping_dump ");
+
+  FINISH;
+}
+
+static void
+vl_api_snat_control_ping_t_handler (vl_api_snat_control_ping_t * mp)
+{
+  vl_api_snat_control_ping_reply_t *rmp;
+  snat_main_t *sm = &snat_main;
+  int rv = 0;
+
+  /* *INDENT-OFF* */
+  REPLY_MACRO2 (VL_API_SNAT_CONTROL_PING_REPLY,
+  ({
+    rmp->vpe_pid = ntohl (getpid ());
+  }));
+  /* *INDENT-ON* */
+}
+
+static void *vl_api_snat_control_ping_t_print
+  (vl_api_snat_control_ping_t * mp, void *handle)
+{
+  u8 *s;
+
+  s = format (0, "SCRIPT: snat_control_ping ");
+
+  FINISH;
+}
+
+static void
+vl_api_snat_show_config_t_handler (vl_api_snat_show_config_t * mp)
+{
+  vl_api_snat_show_config_reply_t *rmp;
+  snat_main_t *sm = &snat_main;
+  int rv = 0;
+
+  /* *INDENT-OFF* */
+  REPLY_MACRO2 (VL_API_SNAT_SHOW_CONFIG_REPLY,
+  ({
+    rmp->translation_buckets = htonl (sm->translation_buckets);
+    rmp->translation_memory_size = htonl (sm->translation_memory_size);
+    rmp->user_buckets = htonl (sm->user_buckets);
+    rmp->user_memory_size = htonl (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);
+    rmp->static_mapping_only = sm->static_mapping_only;
+    rmp->static_mapping_connection_tracking =
+      sm->static_mapping_connection_tracking;
+    rmp->deterministic = sm->deterministic;
+  }));
+  /* *INDENT-ON* */
+}
+
+static void *vl_api_snat_show_config_t_print
+  (vl_api_snat_show_config_t * mp, void *handle)
+{
+  u8 *s;
+
+  s = format (0, "SCRIPT: snat_show_config ");
+
+  FINISH;
+}
+
+static void
+vl_api_snat_set_workers_t_handler (vl_api_snat_set_workers_t * mp)
+{
+  snat_main_t *sm = &snat_main;
+  vl_api_snat_set_workers_reply_t *rmp;
+  int rv = 0;
+  uword *bitmap = 0;
+  u64 mask = clib_net_to_host_u64 (mp->worker_mask);
+
+  if (sm->num_workers < 2)
+    {
+      rv = VNET_API_ERROR_FEATURE_DISABLED;
+      goto send_reply;
+    }
+
+  bitmap = clib_bitmap_set_multiple (bitmap, 0, mask, BITS (mask));
+  rv = snat_set_workers (bitmap);
+  clib_bitmap_free (bitmap);
+
+send_reply:
+  REPLY_MACRO (VL_API_SNAT_SET_WORKERS_REPLY);
+}
+
+static void *vl_api_snat_set_workers_t_print
+  (vl_api_snat_set_workers_t * mp, void *handle)
+{
+  u8 *s;
+  uword *bitmap = 0;
+  u8 first = 1;
+  int i;
+  u64 mask = clib_net_to_host_u64 (mp->worker_mask);
+
+  s = format (0, "SCRIPT: snat_set_workers ");
+  bitmap = clib_bitmap_set_multiple (bitmap, 0, mask, BITS (mask));
+  /* *INDENT-OFF* */
+  clib_bitmap_foreach (i, bitmap,
+    ({
+      if (first)
+        s = format (s, "%d", i);
+      else
+        s = format (s, ",%d", i);
+      first = 0;
+    }));
+  /* *INDENT-ON* */
+  clib_bitmap_free (bitmap);
+  FINISH;
+}
+
+static void
+  send_snat_worker_details
+  (u32 worker_index, unix_shared_memory_queue_t * q, u32 context)
+{
+  vl_api_snat_worker_details_t *rmp;
+  snat_main_t *sm = &snat_main;
+  vlib_worker_thread_t *w =
+    vlib_worker_threads + worker_index + sm->first_worker_index;
+
+  rmp = vl_msg_api_alloc (sizeof (*rmp));
+  memset (rmp, 0, sizeof (*rmp));
+  rmp->_vl_msg_id = ntohs (VL_API_SNAT_WORKER_DETAILS + sm->msg_id_base);
+  rmp->context = context;
+  rmp->worker_index = htonl (worker_index);
+  rmp->lcore_id = htonl (w->lcore_id);
+  strncpy ((char *) rmp->name, (char *) w->name, ARRAY_LEN (rmp->name) - 1);
+
+  vl_msg_api_send_shmem (q, (u8 *) & rmp);
+}
+
+static void
+vl_api_snat_worker_dump_t_handler (vl_api_snat_worker_dump_t * mp)
+{
+  unix_shared_memory_queue_t *q;
+  snat_main_t *sm = &snat_main;
+  u32 *worker_index;
+
+  q = vl_api_client_index_to_input_queue (mp->client_index);
+  if (q == 0)
+    return;
+
+  /* *INDENT-OFF* */
+  vec_foreach (worker_index, sm->workers)
+    send_snat_worker_details(*worker_index, q, mp->context);
+  /* *INDENT-ON* */
+}
+
+static void *vl_api_snat_worker_dump_t_print
+  (vl_api_snat_worker_dump_t * mp, void *handle)
+{
+  u8 *s;
+
+  s = format (0, "SCRIPT: snat_worker_dump ");
+
+  FINISH;
+}
+
+static void
+  vl_api_snat_add_del_interface_addr_t_handler
+  (vl_api_snat_add_del_interface_addr_t * mp)
+{
+  snat_main_t *sm = &snat_main;
+  vl_api_snat_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;
+
+  VALIDATE_SW_IF_INDEX (mp);
+
+  rv = snat_add_interface_address (sm, sw_if_index, is_del);
+
+  BAD_SW_IF_INDEX_LABEL;
+
+  REPLY_MACRO (VL_API_SNAT_ADD_DEL_INTERFACE_ADDR_REPLY);
+}
+
+static void *vl_api_snat_add_del_interface_addr_t_print
+  (vl_api_snat_add_del_interface_addr_t * mp, void *handle)
+{
+  u8 *s;
+
+  s = format (0, "SCRIPT: snat_add_del_interface_addr ");
+  s = format (s, "sw_if_index %d %s",
+	      clib_host_to_net_u32 (mp->sw_if_index),
+	      mp->is_add ? "" : "del");
+
+  FINISH;
+}
+
+static void
+  send_snat_interface_addr_details
+  (u32 sw_if_index, unix_shared_memory_queue_t * q, u32 context)
+{
+  vl_api_snat_interface_addr_details_t *rmp;
+  snat_main_t *sm = &snat_main;
+
+  rmp = vl_msg_api_alloc (sizeof (*rmp));
+  memset (rmp, 0, sizeof (*rmp));
+  rmp->_vl_msg_id =
+    ntohs (VL_API_SNAT_INTERFACE_ADDR_DETAILS + sm->msg_id_base);
+  rmp->sw_if_index = ntohl (sw_if_index);
+  rmp->context = context;
+
+  vl_msg_api_send_shmem (q, (u8 *) & rmp);
+}
+
+static void
+  vl_api_snat_interface_addr_dump_t_handler
+  (vl_api_snat_interface_addr_dump_t * mp)
+{
+  unix_shared_memory_queue_t *q;
+  snat_main_t *sm = &snat_main;
+  u32 *i;
+
+  q = vl_api_client_index_to_input_queue (mp->client_index);
+  if (q == 0)
+    return;
+
+  /* *INDENT-OFF* */
+  vec_foreach (i, sm->auto_add_sw_if_indices)
+    send_snat_interface_addr_details(*i, q, mp->context);
+  /* *INDENT-ON* */
+}
+
+static void *vl_api_snat_interface_addr_dump_t_print
+  (vl_api_snat_interface_addr_dump_t * mp, void *handle)
+{
+  u8 *s;
+
+  s = format (0, "SCRIPT: snat_interface_addr_dump ");
+
+  FINISH;
+}
+
+static void
+  vl_api_snat_ipfix_enable_disable_t_handler
+  (vl_api_snat_ipfix_enable_disable_t * mp)
+{
+  snat_main_t *sm = &snat_main;
+  vl_api_snat_ipfix_enable_disable_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));
+
+  REPLY_MACRO (VL_API_SNAT_IPFIX_ENABLE_DISABLE_REPLY);
+}
+
+static void *vl_api_snat_ipfix_enable_disable_t_print
+  (vl_api_snat_ipfix_enable_disable_t * mp, void *handle)
+{
+  u8 *s;
+
+  s = format (0, "SCRIPT: snat_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;
+}
+
+static void
+  send_snat_user_details
+  (snat_user_t * u, unix_shared_memory_queue_t * q, u32 context)
+{
+  vl_api_snat_user_details_t *rmp;
+  snat_main_t *sm = &snat_main;
+  ip4_fib_t *fib_table;
+
+  rmp = vl_msg_api_alloc (sizeof (*rmp));
+  memset (rmp, 0, sizeof (*rmp));
+  rmp->_vl_msg_id = ntohs (VL_API_SNAT_USER_DETAILS + sm->msg_id_base);
+
+  fib_table = ip4_fib_get (u->fib_index);
+  rmp->vrf_id = ntohl (fib_table->table_id);
+
+  rmp->is_ip4 = 1;
+  clib_memcpy (rmp->ip_address, &(u->addr), 4);
+  rmp->nsessions = ntohl (u->nsessions);
+  rmp->nstaticsessions = ntohl (u->nstaticsessions);
+  rmp->context = context;
+
+  vl_msg_api_send_shmem (q, (u8 *) & rmp);
+}
+
+static void
+vl_api_snat_user_dump_t_handler (vl_api_snat_user_dump_t * mp)
+{
+  unix_shared_memory_queue_t *q;
+  snat_main_t *sm = &snat_main;
+  snat_main_per_thread_data_t *tsm;
+  snat_user_t *u;
+
+  q = vl_api_client_index_to_input_queue (mp->client_index);
+  if (q == 0)
+    return;
+
+  /* *INDENT-OFF* */
+  vec_foreach (tsm, sm->per_thread_data)
+    vec_foreach (u, tsm->users)
+      send_snat_user_details (u, q, mp->context);
+  /* *INDENT-ON* */
+}
+
+static void *vl_api_snat_user_dump_t_print
+  (vl_api_snat_user_dump_t * mp, void *handle)
+{
+  u8 *s;
+
+  s = format (0, "SCRIPT: snat_user_dump ");
+
+  FINISH;
+}
+
+static void
+  send_snat_user_session_details
+  (snat_session_t * s, unix_shared_memory_queue_t * q, u32 context)
+{
+  vl_api_snat_user_session_details_t *rmp;
+  snat_main_t *sm = &snat_main;
+
+  rmp = vl_msg_api_alloc (sizeof (*rmp));
+  memset (rmp, 0, sizeof (*rmp));
+  rmp->_vl_msg_id =
+    ntohs (VL_API_SNAT_USER_SESSION_DETAILS + sm->msg_id_base);
+  rmp->is_ip4 = 1;
+  clib_memcpy (rmp->outside_ip_address, (&s->out2in.addr), 4);
+  rmp->outside_port = s->out2in.port;
+  clib_memcpy (rmp->inside_ip_address, (&s->in2out.addr), 4);
+  rmp->inside_port = s->in2out.port;
+  rmp->protocol = ntohs (snat_proto_to_ip_proto (s->in2out.protocol));
+  rmp->is_static = s->flags & SNAT_SESSION_FLAG_STATIC_MAPPING ? 1 : 0;
+  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);
+  rmp->context = context;
+
+  vl_msg_api_send_shmem (q, (u8 *) & rmp);
+}
+
+static void
+  vl_api_snat_user_session_dump_t_handler
+  (vl_api_snat_user_session_dump_t * mp)
+{
+  unix_shared_memory_queue_t *q;
+  snat_main_t *sm = &snat_main;
+  snat_main_per_thread_data_t *tsm;
+  snat_session_t *s;
+  clib_bihash_kv_8_8_t key, value;
+  snat_user_key_t ukey;
+  snat_user_t *u;
+  u32 session_index, head_index, elt_index;
+  dlist_elt_t *head, *elt;
+
+  q = vl_api_client_index_to_input_queue (mp->client_index);
+  if (q == 0)
+    return;
+  if (!mp->is_ip4)
+    return;
+
+  clib_memcpy (&ukey.addr, mp->ip_address, 4);
+  ukey.fib_index = ip4_fib_index_from_table_id (ntohl (mp->vrf_id));
+  key.key = ukey.as_u64;
+  if (!clib_bihash_search_8_8 (&sm->worker_by_in, &key, &value))
+    tsm = vec_elt_at_index (sm->per_thread_data, value.value);
+  else
+    tsm = vec_elt_at_index (sm->per_thread_data, sm->num_workers);
+  if (clib_bihash_search_8_8 (&sm->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_snat_user_session_details (s, q, mp->context);
+
+      elt_index = elt->next;
+      elt = pool_elt_at_index (tsm->list_pool, elt_index);
+      session_index = elt->value;
+    }
+}
+
+static void *vl_api_snat_user_session_dump_t_print
+  (vl_api_snat_user_session_dump_t * mp, void *handle)
+{
+  u8 *s;
+
+  s = format (0, "SCRIPT: snat_user_session_dump ");
+  s = format (s, "ip_address %U vrf_id %d\n",
+	      format_ip4_address, mp->ip_address,
+	      clib_net_to_host_u32 (mp->vrf_id));
+
+  FINISH;
+}
+
+static void
+vl_api_snat_add_det_map_t_handler (vl_api_snat_add_det_map_t * mp)
+{
+  snat_main_t *sm = &snat_main;
+  vl_api_snat_add_det_map_reply_t *rmp;
+  int rv = 0;
+  ip4_address_t in_addr, out_addr;
+
+  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,
+			 mp->out_plen, mp->is_add);
+
+  REPLY_MACRO (VL_API_SNAT_ADD_DET_MAP_REPLY);
+}
+
+static void *vl_api_snat_add_det_map_t_print
+  (vl_api_snat_add_det_map_t * mp, void *handle)
+{
+  u8 *s;
+
+  s = format (0, "SCRIPT: snat_add_det_map ");
+  s = format (s, "inside address %U/%d outside address %U/%d\n",
+	      format_ip4_address, mp->in_addr, mp->in_plen,
+	      format_ip4_address, mp->out_addr, mp->out_plen);
+
+  FINISH;
+}
+
+static void
+vl_api_snat_det_forward_t_handler (vl_api_snat_det_forward_t * mp)
+{
+  snat_main_t *sm = &snat_main;
+  vl_api_snat_det_forward_reply_t *rmp;
+  int rv = 0;
+  u16 lo_port = 0, hi_port = 0;
+  snat_det_map_t *dm;
+  ip4_address_t in_addr, out_addr;
+
+  out_addr.as_u32 = 0;
+  clib_memcpy (&in_addr, mp->in_addr, 4);
+  dm = snat_det_map_by_user (sm, &in_addr);
+  if (!dm)
+    {
+      rv = VNET_API_ERROR_NO_SUCH_ENTRY;
+      goto send_reply;
+    }
+
+  snat_det_forward (dm, &in_addr, &out_addr, &lo_port);
+  hi_port = lo_port + dm->ports_per_host - 1;
+
+send_reply:
+  /* *INDENT-OFF* */
+  REPLY_MACRO2 (VL_API_SNAT_DET_FORWARD_REPLY,
+  ({
+    rmp->out_port_lo = ntohs (lo_port);
+    rmp->out_port_hi = ntohs (hi_port);
+    rmp->is_ip4 = 1;
+    memset (rmp->out_addr, 0, 16);
+    clib_memcpy (rmp->out_addr, &out_addr, 4);
+  }))
+  /* *INDENT-ON* */
+}
+
+static void *vl_api_snat_det_forward_t_print
+  (vl_api_snat_det_forward_t * mp, void *handle)
+{
+  u8 *s;
+
+  s = format (0, "SCRIPT: smat_det_forward_t");
+  s = format (s, "inside ip address %U\n", format_ip4_address, mp->in_addr);
+
+  FINISH;
+}
+
+static void
+vl_api_snat_det_reverse_t_handler (vl_api_snat_det_reverse_t * mp)
+{
+  snat_main_t *sm = &snat_main;
+  vl_api_snat_det_reverse_reply_t *rmp;
+  int rv = 0;
+  ip4_address_t out_addr, in_addr;
+  snat_det_map_t *dm;
+
+  in_addr.as_u32 = 0;
+  clib_memcpy (&out_addr, mp->out_addr, 4);
+  dm = snat_det_map_by_out (sm, &out_addr);
+  if (!dm)
+    {
+      rv = VNET_API_ERROR_NO_SUCH_ENTRY;
+      goto send_reply;
+    }
+
+  snat_det_reverse (dm, &out_addr, htons (mp->out_port), &in_addr);
+
+send_reply:
+  /* *INDENT-OFF* */
+  REPLY_MACRO2 (VL_API_SNAT_DET_REVERSE_REPLY,
+  ({
+    rmp->is_ip4 = 1;
+    memset (rmp->in_addr, 0, 16);
+    clib_memcpy (rmp->in_addr, &in_addr, 4);
+  }))
+  /* *INDENT-ON* */
+}
+
+static void *vl_api_snat_det_reverse_t_print
+  (vl_api_snat_det_reverse_t * mp, void *handle)
+{
+  u8 *s;
+
+  s = format (0, "SCRIPT: smat_det_reverse_t");
+  s = format (s, "outside ip address %U outside port %d",
+	      format_ip4_address, mp->out_addr, ntohs (mp->out_port));
+
+  FINISH;
+}
+
+static void
+  sent_snat_det_map_details
+  (snat_det_map_t * m, unix_shared_memory_queue_t * q, u32 context)
+{
+  vl_api_snat_det_map_details_t *rmp;
+  snat_main_t *sm = &snat_main;
+
+  rmp = vl_msg_api_alloc (sizeof (*rmp));
+  memset (rmp, 0, sizeof (*rmp));
+  rmp->_vl_msg_id = ntohs (VL_API_SNAT_DET_MAP_DETAILS + sm->msg_id_base);
+  rmp->is_ip4 = 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);
+  rmp->out_plen = m->out_plen;
+  rmp->sharing_ratio = htonl (m->sharing_ratio);
+  rmp->ports_per_host = htons (m->ports_per_host);
+  rmp->ses_num = htonl (m->ses_num);
+  rmp->context = context;
+
+  vl_msg_api_send_shmem (q, (u8 *) & rmp);
+}
+
+static void
+vl_api_snat_det_map_dump_t_handler (vl_api_snat_det_map_dump_t * mp)
+{
+  unix_shared_memory_queue_t *q;
+  snat_main_t *sm = &snat_main;
+  snat_det_map_t *m;
+
+  q = vl_api_client_index_to_input_queue (mp->client_index);
+  if (q == 0)
+    return;
+
+  /* *INDENT-OFF* */
+  vec_foreach(m, sm->det_maps)
+    sent_snat_det_map_details(m, q, mp->context);
+  /* *INDENT-ON* */
+}
+
+static void *vl_api_snat_det_map_dump_t_print
+  (vl_api_snat_det_map_dump_t * mp, void *handle)
+{
+  u8 *s;
+
+  s = format (0, "SCRIPT: snat_det_map_dump ");
+
+  FINISH;
+}
+
+static void
+vl_api_snat_det_set_timeouts_t_handler (vl_api_snat_det_set_timeouts_t * mp)
+{
+  snat_main_t *sm = &snat_main;
+  vl_api_snat_det_set_timeouts_reply_t *rmp;
+  int rv = 0;
+
+  sm->udp_timeout = ntohl (mp->udp);
+  sm->tcp_established_timeout = ntohl (mp->tcp_established);
+  sm->tcp_transitory_timeout = ntohl (mp->tcp_transitory);
+  sm->icmp_timeout = ntohl (mp->icmp);
+
+  REPLY_MACRO (VL_API_SNAT_DET_SET_TIMEOUTS_REPLY);
+}
+
+static void *vl_api_snat_det_set_timeouts_t_print
+  (vl_api_snat_det_set_timeouts_t * mp, void *handle)
+{
+  u8 *s;
+
+  s = format (0, "SCRIPT: snat_det_set_timeouts ");
+  s = format (s, "udp %d tcp_established %d tcp_transitory %d icmp %d\n",
+	      ntohl (mp->udp),
+	      ntohl (mp->tcp_established),
+	      ntohl (mp->tcp_transitory), ntohl (mp->icmp));
+
+  FINISH;
+}
+
+static void
+vl_api_snat_det_get_timeouts_t_handler (vl_api_snat_det_get_timeouts_t * mp)
+{
+  snat_main_t *sm = &snat_main;
+  vl_api_snat_det_get_timeouts_reply_t *rmp;
+  int rv = 0;
+
+  /* *INDENT-OFF* */
+  REPLY_MACRO2 (VL_API_SNAT_DET_GET_TIMEOUTS_REPLY,
+  ({
+    rmp->udp = htonl (sm->udp_timeout);
+    rmp->tcp_established = htonl (sm->tcp_established_timeout);
+    rmp->tcp_transitory = htonl (sm->tcp_transitory_timeout);
+    rmp->icmp = htonl (sm->icmp_timeout);
+  }))
+  /* *INDENT-ON* */
+}
+
+static void *vl_api_snat_det_get_timeouts_t_print
+  (vl_api_snat_det_get_timeouts_t * mp, void *handle)
+{
+  u8 *s;
+
+  s = format (0, "SCRIPT: snat_det_get_timeouts");
+
+  FINISH;
+}
+
+static void
+  vl_api_snat_det_close_session_out_t_handler
+  (vl_api_snat_det_close_session_out_t * mp)
+{
+  snat_main_t *sm = &snat_main;
+  vl_api_snat_det_close_session_out_reply_t *rmp;
+  ip4_address_t out_addr, ext_addr, in_addr;
+  snat_det_out_key_t key;
+  snat_det_map_t *dm;
+  snat_det_session_t *ses;
+  int rv = 0;
+
+  clib_memcpy (&out_addr, mp->out_addr, 4);
+  clib_memcpy (&ext_addr, mp->ext_addr, 4);
+
+  dm = snat_det_map_by_out (sm, &out_addr);
+  if (!dm)
+    {
+      rv = VNET_API_ERROR_NO_SUCH_ENTRY;
+      goto send_reply;
+    }
+  snat_det_reverse (dm, &ext_addr, ntohs (mp->out_port), &in_addr);
+  key.ext_host_addr = ext_addr;
+  key.ext_host_port = mp->ext_port;
+  key.out_port = mp->out_port;
+  ses = snat_det_get_ses_by_out (dm, &in_addr, key.as_u64);
+  if (!ses)
+    {
+      rv = VNET_API_ERROR_NO_SUCH_ENTRY;
+      goto send_reply;
+    }
+  snat_det_ses_close (dm, ses);
+
+send_reply:
+  REPLY_MACRO (VL_API_SNAT_DET_CLOSE_SESSION_OUT_REPLY);
+}
+
+static void *vl_api_snat_det_close_session_out_t_print
+  (vl_api_snat_det_close_session_out_t * mp, void *handle)
+{
+  u8 *s;
+
+  s = format (0, "SCRIPT: snat_det_close_session_out ");
+  s = format (s, "out_addr %U out_port %d "
+	      "ext_addr %U ext_port %d\n",
+	      format_ip4_address, mp->out_addr, ntohs (mp->out_port),
+	      format_ip4_address, mp->ext_addr, ntohs (mp->ext_port));
+
+  FINISH;
+}
+
+static void
+  vl_api_snat_det_close_session_in_t_handler
+  (vl_api_snat_det_close_session_in_t * mp)
+{
+  snat_main_t *sm = &snat_main;
+  vl_api_snat_det_close_session_in_reply_t *rmp;
+  ip4_address_t in_addr, ext_addr;
+  snat_det_out_key_t key;
+  snat_det_map_t *dm;
+  snat_det_session_t *ses;
+  int rv = 0;
+
+  clib_memcpy (&in_addr, mp->in_addr, 4);
+  clib_memcpy (&ext_addr, mp->ext_addr, 4);
+
+  dm = snat_det_map_by_user (sm, &in_addr);
+  if (!dm)
+    {
+      rv = VNET_API_ERROR_NO_SUCH_ENTRY;
+      goto send_reply;
+    }
+  key.ext_host_addr = ext_addr;
+  key.ext_host_port = mp->ext_port;
+  ses = snat_det_find_ses_by_in (dm, &in_addr, mp->in_port, key);
+  if (!ses)
+    {
+      rv = VNET_API_ERROR_NO_SUCH_ENTRY;
+      goto send_reply;
+    }
+  snat_det_ses_close (dm, ses);
+
+send_reply:
+  REPLY_MACRO (VL_API_SNAT_DET_CLOSE_SESSION_OUT_REPLY);
+}
+
+static void *vl_api_snat_det_close_session_in_t_print
+  (vl_api_snat_det_close_session_in_t * mp, void *handle)
+{
+  u8 *s;
+  s = format (0, "SCRIPT: snat_det_close_session_in ");
+  s = format (s, "in_addr %U in_port %d "
+	      "ext_addr %U ext_port %d\n",
+	      format_ip4_address, mp->in_addr, ntohs (mp->in_port),
+	      format_ip4_address, mp->ext_addr, ntohs (mp->ext_port));
+
+  FINISH;
+}
+
+static void
+  send_snat_det_session_details
+  (snat_det_session_t * s, unix_shared_memory_queue_t * q, u32 context)
+{
+  vl_api_snat_det_session_details_t *rmp;
+  snat_main_t *sm = &snat_main;
+
+  rmp = vl_msg_api_alloc (sizeof (*rmp));
+  memset (rmp, 0, sizeof (*rmp));
+  rmp->_vl_msg_id = ntohs (VL_API_SNAT_DET_SESSION_DETAILS + sm->msg_id_base);
+  rmp->is_ip4 = 1;
+  rmp->in_port = s->in_port;
+  clib_memcpy (rmp->ext_addr, &s->out.ext_host_addr, 4);
+  rmp->ext_port = s->out.ext_host_port;
+  rmp->out_port = s->out.out_port;
+  rmp->state = s->state;
+  rmp->expire = ntohl (s->expire);
+  rmp->context = context;
+
+  vl_msg_api_send_shmem (q, (u8 *) & rmp);
+}
+
+static void
+vl_api_snat_det_session_dump_t_handler (vl_api_snat_det_session_dump_t * mp)
+{
+  unix_shared_memory_queue_t *q;
+  snat_main_t *sm = &snat_main;
+  ip4_address_t user_addr;
+  snat_det_map_t *dm;
+  snat_det_session_t *s, empty_ses;
+  u16 i;
+
+  q = vl_api_client_index_to_input_queue (mp->client_index);
+  if (q == 0)
+    return;
+  if (!mp->is_ip4)
+    return;
+
+  memset (&empty_ses, 0, sizeof (empty_ses));
+  clib_memcpy (&user_addr, mp->user_addr, 4);
+  dm = snat_det_map_by_user (sm, &user_addr);
+  if (!dm)
+    return;
+
+  s = dm->sessions + snat_det_user_ses_offset (&user_addr, dm->in_plen);
+  for (i = 0; i < SNAT_DET_SES_PER_USER; i++)
+    {
+      if (s->out.as_u64)
+	send_snat_det_session_details (s, q, mp->context);
+      s++;
+    }
+}
+
+static void *vl_api_snat_det_session_dump_t_print
+  (vl_api_snat_det_session_dump_t * mp, void *handle)
+{
+  u8 *s;
+
+  s = format (0, "SCRIPT: snat_det_session_dump ");
+  s = format (s, "user_addr %U\n", format_ip4_address, mp->user_addr);
+
+  FINISH;
+}
+
+/* List of message types that this plugin understands */
+#define foreach_snat_plugin_api_msg                                     \
+_(SNAT_ADD_ADDRESS_RANGE, snat_add_address_range)                       \
+_(SNAT_INTERFACE_ADD_DEL_FEATURE, snat_interface_add_del_feature)       \
+_(SNAT_ADD_STATIC_MAPPING, snat_add_static_mapping)                     \
+_(SNAT_CONTROL_PING, snat_control_ping)                                 \
+_(SNAT_STATIC_MAPPING_DUMP, snat_static_mapping_dump)                   \
+_(SNAT_SHOW_CONFIG, snat_show_config)                                   \
+_(SNAT_ADDRESS_DUMP, snat_address_dump)                                 \
+_(SNAT_INTERFACE_DUMP, snat_interface_dump)                             \
+_(SNAT_SET_WORKERS, snat_set_workers)                                   \
+_(SNAT_WORKER_DUMP, snat_worker_dump)                                   \
+_(SNAT_ADD_DEL_INTERFACE_ADDR, snat_add_del_interface_addr)             \
+_(SNAT_INTERFACE_ADDR_DUMP, snat_interface_addr_dump)                   \
+_(SNAT_IPFIX_ENABLE_DISABLE, snat_ipfix_enable_disable)                 \
+_(SNAT_USER_DUMP, snat_user_dump)                                       \
+_(SNAT_USER_SESSION_DUMP, snat_user_session_dump)                       \
+_(SNAT_ADD_DET_MAP, snat_add_det_map)                                   \
+_(SNAT_DET_FORWARD, snat_det_forward)                                   \
+_(SNAT_DET_REVERSE, snat_det_reverse)                                   \
+_(SNAT_DET_MAP_DUMP, snat_det_map_dump)                                 \
+_(SNAT_DET_SET_TIMEOUTS, snat_det_set_timeouts)                         \
+_(SNAT_DET_GET_TIMEOUTS, snat_det_get_timeouts)                         \
+_(SNAT_DET_CLOSE_SESSION_OUT, snat_det_close_session_out)               \
+_(SNAT_DET_CLOSE_SESSION_IN, snat_det_close_session_in)                 \
+_(SNAT_DET_SESSION_DUMP, snat_det_session_dump)
+
+
+/* Set up the API message handling tables */
+static clib_error_t *
+snat_plugin_api_hookup (vlib_main_t * vm)
+{
+  snat_main_t *sm __attribute__ ((unused)) = &snat_main;
+#define _(N,n)                                                  \
+    vl_msg_api_set_handlers((VL_API_##N + sm->msg_id_base),     \
+                           #n,					\
+                           vl_api_##n##_t_handler,              \
+                           vl_noop_handler,                     \
+                           vl_api_##n##_t_endian,               \
+                           vl_api_##n##_t_print,                \
+                           sizeof(vl_api_##n##_t), 1);
+  foreach_snat_plugin_api_msg;
+#undef _
+
+  return 0;
+}
+
+#define vl_msg_name_crc_list
+#include <snat/snat_all_api_h.h>
+#undef vl_msg_name_crc_list
+
+static void
+setup_message_id_table (snat_main_t * sm, api_main_t * am)
+{
+#define _(id,n,crc) \
+  vl_msg_api_add_msg_name_crc (am, #n "_" #crc, id + sm->msg_id_base);
+  foreach_vl_msg_name_crc_snat;
+#undef _
+}
+
+static void
+plugin_custom_dump_configure (snat_main_t * sm)
+{
+#define _(n,f) sm->api_main->msg_print_handlers \
+  [VL_API_##n + sm->msg_id_base]                \
+    = (void *) vl_api_##f##_t_print;
+  foreach_snat_plugin_api_msg;
+#undef _
+}
+
+clib_error_t *
+snat_api_init (vlib_main_t * vm, snat_main_t * sm)
+{
+  u8 *name;
+  clib_error_t *error = 0;
+
+  name = format (0, "snat_%08x%c", api_version, 0);
+
+  /* Ask for a correctly-sized block of API message decode slots */
+  sm->msg_id_base =
+    vl_msg_api_get_msg_ids ((char *) name, VL_MSG_FIRST_AVAILABLE);
+
+  error = snat_plugin_api_hookup (vm);
+
+  /* Add our API messages to the global name_crc hash table */
+  setup_message_id_table (sm, sm->api_main);
+
+  plugin_custom_dump_configure (sm);
+
+  vec_free (name);
+
+  return error;
+}
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */