NAT: Rename snat plugin to nat (VPP-955)

Change-Id: I30a7e3da7a4efc6038a91e27b48045d4b07e2764
Signed-off-by: Matus Fabian <matfabia@cisco.com>

1 files changed, 0 insertions, 835 deletions

diff --git a/src/plugins/snat/snat_ipfix_logging.c b/src/plugins/snat/snat_ipfix_logging.c
deleted file mode 100644
index c68dc540d15..00000000000
--- a/src/plugins/snat/snat_ipfix_logging.c
+++ /dev/null
@@ -1,835 +0,0 @@
-/*
- * snat_ipfix_logging.c - NAT Events IPFIX logging
- *
- * Copyright (c) 2016 Cisco and/or its affiliates.
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at:
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <vnet/flow/flow_report.h>
-#include <vlibmemory/api.h>
-#include <snat/snat.h>
-#include <snat/snat_ipfix_logging.h>
-
-snat_ipfix_logging_main_t snat_ipfix_logging_main;
-
-#define NAT44_SESSION_CREATE_LEN 26
-#define NAT_ADDRESSES_EXHAUTED_LEN 13
-#define MAX_ENTRIES_PER_USER_LEN 17
-
-#define NAT44_SESSION_CREATE_FIELD_COUNT 8
-#define NAT_ADDRESSES_EXHAUTED_FIELD_COUNT 3
-#define MAX_ENTRIES_PER_USER_FIELD_COUNT 4
-
-typedef struct {
-  u8 nat_event;
-  u32 src_ip;
-  u32 nat_src_ip;
-  snat_protocol_t snat_proto;
-  u16 src_port;
-  u16 nat_src_port;
-  u32 vrf_id;
-} snat_ipfix_logging_nat44_ses_args_t;
-
-typedef struct {
-  u32 pool_id;
-} snat_ipfix_logging_addr_exhausted_args_t;
-
-typedef struct {
-  u32 src_ip;
-} snat_ipfix_logging_max_entries_per_user_args_t;
-
-/**
- * @brief Create an IPFIX template packet rewrite string
- *
- * @param frm               flow report main
- * @param fr                flow report
- * @param collector_address collector address
- * @param src_address       source address
- * @param collector_port    collector
- * @param event             NAT event ID
- * @param quota_event       NAT quota exceeded event ID
- *
- * @returns template packet
- */
-static inline u8 *
-snat_template_rewrite (flow_report_main_t * frm,
-                       flow_report_t * fr,
-                       ip4_address_t * collector_address,
-                       ip4_address_t * src_address,
-                       u16 collector_port,
-                       nat_event_t event,
-                       quota_exceed_event_t quota_event)
-{
-  snat_ipfix_logging_main_t *silm = &snat_ipfix_logging_main;
-  ip4_header_t *ip;
-  udp_header_t *udp;
-  ipfix_message_header_t *h;
-  ipfix_set_header_t *s;
-  ipfix_template_header_t *t;
-  ipfix_field_specifier_t *f;
-  ipfix_field_specifier_t *first_field;
-  u8 *rewrite = 0;
-  ip4_ipfix_template_packet_t *tp;
-  u32 field_count = 0;
-  flow_report_stream_t *stream;
-
-  stream = &frm->streams[fr->stream_index];
-  silm->stream_index = fr->stream_index;
-
-  if (event == NAT_ADDRESSES_EXHAUTED)
-    {
-      field_count = NAT_ADDRESSES_EXHAUTED_FIELD_COUNT;
-      silm->addr_exhausted_template_id = fr->template_id;
-    }
-  else if (event == NAT44_SESSION_CREATE)
-    {
-      field_count = NAT44_SESSION_CREATE_FIELD_COUNT;
-      silm->nat44_session_template_id = fr->template_id;
-    }
-  else if (event == QUOTA_EXCEEDED)
-    {
-      if (quota_event == MAX_ENTRIES_PER_USER)
-        {
-          field_count = MAX_ENTRIES_PER_USER_FIELD_COUNT;
-          silm->max_entries_per_user_template_id = fr->template_id;
-        }
-    }
-
-  /* allocate rewrite space */
-  vec_validate_aligned (rewrite,
-			sizeof (ip4_ipfix_template_packet_t)
-			+ field_count * sizeof (ipfix_field_specifier_t) - 1,
-			CLIB_CACHE_LINE_BYTES);
-
-  tp = (ip4_ipfix_template_packet_t *) rewrite;
-  ip = (ip4_header_t *) & tp->ip4;
-  udp = (udp_header_t *) (ip + 1);
-  h = (ipfix_message_header_t *) (udp + 1);
-  s = (ipfix_set_header_t *) (h + 1);
-  t = (ipfix_template_header_t *) (s + 1);
-  first_field = f = (ipfix_field_specifier_t *) (t + 1);
-
-  ip->ip_version_and_header_length = 0x45;
-  ip->ttl = 254;
-  ip->protocol = IP_PROTOCOL_UDP;
-  ip->src_address.as_u32 = src_address->as_u32;
-  ip->dst_address.as_u32 = collector_address->as_u32;
-  udp->src_port = clib_host_to_net_u16 (stream->src_port);
-  udp->dst_port = clib_host_to_net_u16 (collector_port);
-  udp->length = clib_host_to_net_u16 (vec_len (rewrite) - sizeof (*ip));
-
-  /* FIXUP: message header export_time */
-  h->domain_id = clib_host_to_net_u32 (stream->domain_id);
-
-  /* Add TLVs to the template */
-  if (event == NAT_ADDRESSES_EXHAUTED)
-    {
-      f->e_id_length = ipfix_e_id_length (0, observationTimeMilliseconds, 8);
-      f++;
-      f->e_id_length = ipfix_e_id_length (0, natEvent, 1);
-      f++;
-      f->e_id_length = ipfix_e_id_length (0, natPoolId, 4);
-      f++;
-    }
-  else if (event == NAT44_SESSION_CREATE)
-    {
-      f->e_id_length = ipfix_e_id_length (0, observationTimeMilliseconds, 8);
-      f++;
-      f->e_id_length = ipfix_e_id_length (0, natEvent, 1);
-      f++;
-      f->e_id_length = ipfix_e_id_length (0, sourceIPv4Address, 4);
-      f++;
-      f->e_id_length = ipfix_e_id_length (0, postNATSourceIPv4Address, 4);
-      f++;
-      f->e_id_length = ipfix_e_id_length (0, protocolIdentifier, 1);
-      f++;
-      f->e_id_length = ipfix_e_id_length (0, sourceTransportPort, 2);
-      f++;
-      f->e_id_length = ipfix_e_id_length (0, postNAPTSourceTransportPort, 2);
-      f++;
-      f->e_id_length = ipfix_e_id_length (0, ingressVRFID, 4);
-      f++;
-    }
-  else if (event == QUOTA_EXCEEDED)
-    {
-      if (quota_event == MAX_ENTRIES_PER_USER)
-        {
-          f->e_id_length = ipfix_e_id_length (0, observationTimeMilliseconds,
-                                              8);
-          f++;
-          f->e_id_length = ipfix_e_id_length (0, natEvent, 1);
-          f++;
-          f->e_id_length = ipfix_e_id_length (0, natQuotaExceededEvent, 4);
-          f++;
-          f->e_id_length = ipfix_e_id_length (0, sourceIPv4Address, 4);
-          f++;
-        }
-    }
-
-  /* Back to the template packet... */
-  ip = (ip4_header_t *) & tp->ip4;
-  udp = (udp_header_t *) (ip + 1);
-
-  ASSERT (f - first_field);
-  /* Field count in this template */
-  t->id_count = ipfix_id_count (fr->template_id, f - first_field);
-
-  /* set length in octets */
-  s->set_id_length =
-    ipfix_set_id_length (2 /* set_id */ , (u8 *) f - (u8 *) s);
-
-  /* message length in octets */
-  h->version_length = version_length ((u8 *) f - (u8 *) h);
-
-  ip->length = clib_host_to_net_u16 ((u8 *) f - (u8 *) ip);
-  ip->checksum = ip4_header_checksum (ip);
-
-  return rewrite;
-}
-
-u8 *
-snat_template_rewrite_addr_exhausted (flow_report_main_t * frm,
-                                      flow_report_t * fr,
-                                      ip4_address_t * collector_address,
-                                      ip4_address_t * src_address,
-                                      u16 collector_port)
-{
-  return snat_template_rewrite (frm, fr, collector_address, src_address,
-                                collector_port, NAT_ADDRESSES_EXHAUTED, 0);
-}
-
-u8 *
-snat_template_rewrite_nat44_session (flow_report_main_t * frm,
-                                     flow_report_t * fr,
-                                     ip4_address_t * collector_address,
-                                     ip4_address_t * src_address,
-                                     u16 collector_port)
-{
-  return snat_template_rewrite (frm, fr, collector_address, src_address,
-                                collector_port, NAT44_SESSION_CREATE, 0);
-}
-
-u8 *
-snat_template_rewrite_max_entries_per_usr (flow_report_main_t * frm,
-                                           flow_report_t * fr,
-                                           ip4_address_t * collector_address,
-                                           ip4_address_t * src_address,
-                                           u16 collector_port)
-{
-  return snat_template_rewrite (frm, fr, collector_address, src_address,
-                                collector_port, QUOTA_EXCEEDED,
-                                MAX_ENTRIES_PER_USER);
-}
-
-static inline void
-snat_ipfix_header_create (flow_report_main_t * frm,
-                          vlib_buffer_t * b0,
-                          u32 * offset)
-{
-  snat_ipfix_logging_main_t *silm = &snat_ipfix_logging_main;
-  flow_report_stream_t *stream;
-  ip4_ipfix_template_packet_t * tp;
-  ipfix_message_header_t * h = 0;
-  ipfix_set_header_t * s = 0;
-  ip4_header_t * ip;
-  udp_header_t * udp;
-
-  stream = &frm->streams[silm->stream_index];
-
-  b0->current_data = 0;
-  b0->current_length = sizeof (*ip) + sizeof (*udp) + sizeof (*h) +
-                       sizeof (*s);
-  b0->flags |= (VLIB_BUFFER_TOTAL_LENGTH_VALID | VLIB_BUFFER_FLOW_REPORT);
-  vnet_buffer (b0)->sw_if_index[VLIB_RX] = 0;
-  vnet_buffer (b0)->sw_if_index[VLIB_TX] = frm->fib_index;
-  tp = vlib_buffer_get_current (b0);
-  ip = (ip4_header_t *) &tp->ip4;
-  udp = (udp_header_t *) (ip+1);
-  h = (ipfix_message_header_t *)(udp+1);
-  s = (ipfix_set_header_t *)(h+1);
-
-  ip->ip_version_and_header_length = 0x45;
-  ip->ttl = 254;
-  ip->protocol = IP_PROTOCOL_UDP;
-  ip->flags_and_fragment_offset = 0;
-  ip->src_address.as_u32 = frm->src_address.as_u32;
-  ip->dst_address.as_u32 = frm->ipfix_collector.as_u32;
-  udp->src_port = clib_host_to_net_u16 (stream->src_port);
-  udp->dst_port = clib_host_to_net_u16 (frm->collector_port);
-  udp->checksum = 0;
-
-  h->export_time = clib_host_to_net_u32 (
-    (u32) (((f64)frm->unix_time_0) + (vlib_time_now(frm->vlib_main) -
-    frm->vlib_time_0)));
-  h->sequence_number = clib_host_to_net_u32 (stream->sequence_number++);
-  h->domain_id = clib_host_to_net_u32 (stream->domain_id);
-
-  *offset = (u32) (((u8 *)(s+1)) - (u8 *)tp);
-}
-
-static inline void
-snat_ipfix_send (flow_report_main_t * frm,
-                 vlib_frame_t * f,
-                 vlib_buffer_t * b0,
-                 u16 template_id)
-{
-  ip4_ipfix_template_packet_t * tp;
-  ipfix_message_header_t * h = 0;
-  ipfix_set_header_t * s = 0;
-  ip4_header_t * ip;
-  udp_header_t * udp;
-  vlib_main_t * vm = frm->vlib_main;
-
-  tp = vlib_buffer_get_current (b0);
-  ip = (ip4_header_t *) & tp->ip4;
-  udp = (udp_header_t *) (ip + 1);
-  h = (ipfix_message_header_t *) (udp + 1);
-  s = (ipfix_set_header_t *) (h + 1);
-
-  s->set_id_length = ipfix_set_id_length (template_id,
-                                          b0->current_length -
-                                          (sizeof (*ip) + sizeof (*udp) +
-                                           sizeof (*h)));
-  h->version_length = version_length (b0->current_length -
-                                      (sizeof (*ip) + sizeof (*udp)));
-
-  ip->length = clib_host_to_net_u16 (b0->current_length);
-  ip->checksum = ip4_header_checksum (ip);
-  udp->length = clib_host_to_net_u16 (b0->current_length - sizeof (*ip));
-
-  if (frm->udp_checksum)
-    {
-      udp->checksum = ip4_tcp_udp_compute_checksum (vm, b0, ip);
-      if (udp->checksum == 0)
-        udp->checksum = 0xffff;
-    }
-
-  ASSERT (ip->checksum == ip4_header_checksum (ip));
-
-  vlib_put_frame_to_node (vm, ip4_lookup_node.index, f);
-}
-
-static void
-snat_ipfix_logging_nat44_ses (u8 nat_event, u32 src_ip, u32 nat_src_ip,
-                              snat_protocol_t snat_proto, u16 src_port,
-                              u16 nat_src_port, u32 vrf_id, int do_flush)
-{
-  snat_ipfix_logging_main_t *silm = &snat_ipfix_logging_main;
-  flow_report_main_t *frm = &flow_report_main;
-  vlib_frame_t *f;
-  vlib_buffer_t *b0 = 0;
-  u32 bi0 = ~0;
-  u32 offset;
-  vlib_main_t * vm = frm->vlib_main;
-  u64 now;
-  vlib_buffer_free_list_t *fl;
-  u8 proto = ~0;
-
-  if (!silm->enabled)
-    return;
-
-  proto = snat_proto_to_ip_proto (snat_proto);
-
-  now = (u64) ((vlib_time_now (vm) - silm->vlib_time_0) * 1e3);
-  now += silm->milisecond_time_0;
-
-  b0 = silm->nat44_session_buffer;
-
-  if (PREDICT_FALSE (b0 == 0))
-    {
-      if (do_flush)
-        return;
-
-      if (vlib_buffer_alloc (vm, &bi0, 1) != 1)
-        {
-          clib_warning ("can't allocate buffer for NAT IPFIX event");
-          return;
-        }
-
-      b0 = silm->nat44_session_buffer =
-        vlib_get_buffer (vm, bi0);
-      fl = vlib_buffer_get_free_list (vm, VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
-      vlib_buffer_init_for_free_list (b0, fl);
-      VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b0);
-      offset = 0;
-    }
-  else
-    {
-      bi0 = vlib_get_buffer_index (vm, b0);
-      offset = silm->nat44_session_next_record_offset;
-    }
-
-  f = silm->nat44_session_frame;
-  if (PREDICT_FALSE (f == 0))
-    {
-      u32 * to_next;
-      f = vlib_get_frame_to_node (vm, ip4_lookup_node.index);
-      silm->nat44_session_frame = f;
-      to_next = vlib_frame_vector_args (f);
-      to_next[0] = bi0;
-      f->n_vectors = 1;
-    }
-
-  if (PREDICT_FALSE (offset == 0))
-    snat_ipfix_header_create (frm, b0, &offset);
-
-  if (PREDICT_TRUE (do_flush == 0))
-    {
-      u64 time_stamp = clib_host_to_net_u64 (now);
-      clib_memcpy (b0->data + offset, &time_stamp, sizeof (time_stamp));
-      offset += sizeof (time_stamp);
-
-      clib_memcpy (b0->data + offset, &nat_event, sizeof (nat_event));
-      offset += sizeof (nat_event);
-
-      clib_memcpy (b0->data + offset, &src_ip, sizeof (src_ip));
-      offset += sizeof (src_ip);
-
-      clib_memcpy (b0->data + offset, &nat_src_ip, sizeof (nat_src_ip));
-      offset += sizeof (nat_src_ip);
-
-      clib_memcpy (b0->data + offset, &proto, sizeof (proto));
-      offset += sizeof (proto);
-
-      clib_memcpy (b0->data + offset, &src_port, sizeof (src_port));
-      offset += sizeof (src_port);
-
-      clib_memcpy (b0->data + offset, &nat_src_port, sizeof (nat_src_port));
-      offset += sizeof (nat_src_port);
-
-      clib_memcpy (b0->data + offset, &vrf_id, sizeof(vrf_id));
-      offset += sizeof (vrf_id);
-
-      b0->current_length += NAT44_SESSION_CREATE_LEN;
-    }
-
-  if (PREDICT_FALSE (do_flush || (offset + NAT44_SESSION_CREATE_LEN) > frm->path_mtu))
-    {
-      snat_ipfix_send (frm, f, b0, silm->nat44_session_template_id);
-      silm->nat44_session_frame = 0;
-      silm->nat44_session_buffer = 0;
-      offset = 0;
-    }
-  silm->nat44_session_next_record_offset = offset;
- }
-
-static void
-snat_ipfix_logging_addr_exhausted (u32 pool_id, int do_flush)
-{
-  snat_ipfix_logging_main_t *silm = &snat_ipfix_logging_main;
-  flow_report_main_t *frm = &flow_report_main;
-  vlib_frame_t *f;
-  vlib_buffer_t *b0 = 0;
-  u32 bi0 = ~0;
-  u32 offset;
-  vlib_main_t * vm = frm->vlib_main;
-  u64 now;
-  vlib_buffer_free_list_t *fl;
-  u8 nat_event = NAT_ADDRESSES_EXHAUTED;
-
-  if (!silm->enabled)
-    return;
-
-  now = (u64) ((vlib_time_now (vm) - silm->vlib_time_0) * 1e3);
-  now += silm->milisecond_time_0;
-
-  b0 = silm->addr_exhausted_buffer;
-
-  if (PREDICT_FALSE (b0 == 0))
-    {
-      if (do_flush)
-        return;
-
-      if (vlib_buffer_alloc (vm, &bi0, 1) != 1)
-        {
-          clib_warning ("can't allocate buffer for NAT IPFIX event");
-          return;
-        }
-
-      b0 = silm->addr_exhausted_buffer =
-        vlib_get_buffer (vm, bi0);
-      fl = vlib_buffer_get_free_list (vm, VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
-      vlib_buffer_init_for_free_list (b0, fl);
-      VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b0);
-      offset = 0;
-    }
-  else
-    {
-      bi0 = vlib_get_buffer_index (vm, b0);
-      offset = silm->addr_exhausted_next_record_offset;
-    }
-
-  f = silm->addr_exhausted_frame;
-  if (PREDICT_FALSE (f == 0))
-    {
-      u32 * to_next;
-      f = vlib_get_frame_to_node (vm, ip4_lookup_node.index);
-      silm->addr_exhausted_frame = f;
-      to_next = vlib_frame_vector_args (f);
-      to_next[0] = bi0;
-      f->n_vectors = 1;
-    }
-
-  if (PREDICT_FALSE (offset == 0))
-    snat_ipfix_header_create (frm, b0, &offset);
-
-  if (PREDICT_TRUE (do_flush == 0))
-    {
-      u64 time_stamp = clib_host_to_net_u64 (now);
-      clib_memcpy (b0->data + offset, &time_stamp, sizeof (time_stamp));
-      offset += sizeof (time_stamp);
-
-      clib_memcpy (b0->data + offset, &nat_event, sizeof (nat_event));
-      offset += sizeof (nat_event);
-
-      clib_memcpy (b0->data + offset, &pool_id, sizeof(pool_id));
-      offset += sizeof (pool_id);
-
-      b0->current_length += NAT_ADDRESSES_EXHAUTED_LEN;
-    }
-
-  if (PREDICT_FALSE (do_flush || (offset + NAT_ADDRESSES_EXHAUTED_LEN) > frm->path_mtu))
-    {
-      snat_ipfix_send (frm, f, b0, silm->addr_exhausted_template_id);
-      silm->addr_exhausted_frame = 0;
-      silm->addr_exhausted_buffer = 0;
-      offset = 0;
-    }
-  silm->addr_exhausted_next_record_offset = offset;
-}
-
-static void
-snat_ipfix_logging_max_entries_per_usr (u32 src_ip, int do_flush)
-{
-  snat_ipfix_logging_main_t *silm = &snat_ipfix_logging_main;
-  flow_report_main_t *frm = &flow_report_main;
-  vlib_frame_t *f;
-  vlib_buffer_t *b0 = 0;
-  u32 bi0 = ~0;
-  u32 offset;
-  vlib_main_t * vm = frm->vlib_main;
-  u64 now;
-  vlib_buffer_free_list_t *fl;
-  u8 nat_event = QUOTA_EXCEEDED;
-  u32 quota_event = MAX_ENTRIES_PER_USER;
-
-  if (!silm->enabled)
-    return;
-
-  now = (u64) ((vlib_time_now (vm) - silm->vlib_time_0) * 1e3);
-  now += silm->milisecond_time_0;
-
-  b0 = silm->max_entries_per_user_buffer;
-
-  if (PREDICT_FALSE (b0 == 0))
-    {
-      if (do_flush)
-        return;
-
-      if (vlib_buffer_alloc (vm, &bi0, 1) != 1)
-        {
-          clib_warning ("can't allocate buffer for NAT IPFIX event");
-          return;
-        }
-
-      b0 = silm->max_entries_per_user_buffer =
-        vlib_get_buffer (vm, bi0);
-      fl = vlib_buffer_get_free_list (vm, VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
-      vlib_buffer_init_for_free_list (b0, fl);
-      VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b0);
-      offset = 0;
-    }
-  else
-    {
-      bi0 = vlib_get_buffer_index (vm, b0);
-      offset = silm->max_entries_per_user_next_record_offset;
-    }
-
-  f = silm->max_entries_per_user_frame;
-  if (PREDICT_FALSE (f == 0))
-    {
-      u32 * to_next;
-      f = vlib_get_frame_to_node (vm, ip4_lookup_node.index);
-      silm->max_entries_per_user_frame = f;
-      to_next = vlib_frame_vector_args (f);
-      to_next[0] = bi0;
-      f->n_vectors = 1;
-    }
-
-  if (PREDICT_FALSE (offset == 0))
-    snat_ipfix_header_create (frm, b0, &offset);
-
-  if (PREDICT_TRUE (do_flush == 0))
-    {
-      u64 time_stamp = clib_host_to_net_u64 (now);
-      clib_memcpy (b0->data + offset, &time_stamp, sizeof (time_stamp));
-      offset += sizeof (time_stamp);
-
-      clib_memcpy (b0->data + offset, &nat_event, sizeof (nat_event));
-      offset += sizeof (nat_event);
-
-      clib_memcpy (b0->data + offset, &quota_event, sizeof(quota_event));
-      offset += sizeof (quota_event);
-
-      clib_memcpy (b0->data + offset, &src_ip, sizeof (src_ip));
-      offset += sizeof (src_ip);
-
-      b0->current_length += MAX_ENTRIES_PER_USER_LEN;
-    }
-
-  if (PREDICT_FALSE (do_flush || (offset + MAX_ENTRIES_PER_USER_LEN) > frm->path_mtu))
-    {
-      snat_ipfix_send (frm, f, b0, silm->max_entries_per_user_template_id);
-      silm->max_entries_per_user_frame = 0;
-      silm->max_entries_per_user_buffer = 0;
-      offset = 0;
-    }
-  silm->max_entries_per_user_next_record_offset = offset;
-}
-
-static void
-snat_ipfix_logging_nat44_ses_rpc_cb (snat_ipfix_logging_nat44_ses_args_t *a)
-{
-  snat_ipfix_logging_nat44_ses(a->nat_event, a->src_ip, a->nat_src_ip,
-                               a->snat_proto, a->src_port, a->nat_src_port,
-                               a->vrf_id, 0);
-}
-
-/**
- * @brief Generate NAT44 session create event
- *
- * @param src_ip       source IPv4 address
- * @param nat_src_ip   transaltes source IPv4 address
- * @param snat_proto   SNAT transport protocol
- * @param src_port     source port
- * @param nat_src_port translated source port
- * @param vrf_id       VRF ID
- */
-void
-snat_ipfix_logging_nat44_ses_create (u32 src_ip,
-                                     u32 nat_src_ip,
-                                     snat_protocol_t snat_proto,
-                                     u16 src_port,
-                                     u16 nat_src_port,
-                                     u32 vrf_id)
-{
-  snat_ipfix_logging_nat44_ses_args_t a;
-
-  a.nat_event = NAT44_SESSION_CREATE;
-  a.src_ip = src_ip;
-  a.nat_src_ip = nat_src_ip;
-  a.snat_proto = snat_proto;
-  a.src_port = src_port;
-  a.nat_src_port = nat_src_port;
-  a.vrf_id = vrf_id;
-
-  vl_api_rpc_call_main_thread (snat_ipfix_logging_nat44_ses_rpc_cb, (u8 *) &a,
-                               sizeof (a));
-}
-
-/**
- * @brief Generate NAT44 session delete event
- *
- * @param src_ip       source IPv4 address
- * @param nat_src_ip   transaltes source IPv4 address
- * @param snat_proto   SNAT transport protocol
- * @param src_port     source port
- * @param nat_src_port translated source port
- * @param vrf_id       VRF ID
- */
-void
-snat_ipfix_logging_nat44_ses_delete (u32 src_ip,
-                                     u32 nat_src_ip,
-                                     snat_protocol_t snat_proto,
-                                     u16 src_port,
-                                     u16 nat_src_port,
-                                     u32 vrf_id)
-{
-  snat_ipfix_logging_nat44_ses_args_t a;
-
-  a.nat_event = NAT44_SESSION_DELETE;
-  a.src_ip = src_ip;
-  a.nat_src_ip = nat_src_ip;
-  a.snat_proto = snat_proto;
-  a.src_port = src_port;
-  a.nat_src_port = nat_src_port;
-  a.vrf_id = vrf_id;
-
-  vl_api_rpc_call_main_thread (snat_ipfix_logging_nat44_ses_rpc_cb, (u8 *) &a,
-                               sizeof (a));
-}
-
-vlib_frame_t *
-snat_data_callback_nat44_session (flow_report_main_t * frm,
-                                  flow_report_t * fr,
-                                  vlib_frame_t * f,
-                                  u32 * to_next,
-                                  u32 node_index)
-{
-  snat_ipfix_logging_nat44_ses(0, 0, 0, 0, 0, 0, 0, 1);
-  return f;
-}
-
-static void
-snat_ipfix_logging_addr_exhausted_rpc_cb
- (snat_ipfix_logging_addr_exhausted_args_t * a)
-{
-  snat_ipfix_logging_addr_exhausted(a->pool_id, 0);
-}
-
-/**
- * @brief Generate NAT addresses exhausted event
- *
- * @param pool_id NAT pool ID
- */
-void
-snat_ipfix_logging_addresses_exhausted(u32 pool_id)
-{
-  //TODO: This event SHOULD be rate limited
-  snat_ipfix_logging_addr_exhausted_args_t a;
-
-  a.pool_id = pool_id;
-
-  vl_api_rpc_call_main_thread (snat_ipfix_logging_addr_exhausted_rpc_cb,
-                               (u8 *) &a, sizeof (a));
-}
-
-vlib_frame_t *
-snat_data_callback_addr_exhausted (flow_report_main_t * frm,
-                                   flow_report_t * fr,
-                                   vlib_frame_t * f,
-                                   u32 * to_next,
-                                   u32 node_index)
-{
-  snat_ipfix_logging_addr_exhausted(0, 1);
-  return f;
-}
-
-static void
-snat_ipfix_logging_max_entries_per_usr_rpc_cb
- (snat_ipfix_logging_max_entries_per_user_args_t * a)
-{
-  snat_ipfix_logging_max_entries_per_usr(a->src_ip, 0);
-}
-
-/**
- * @brief Generate maximum entries per user exceeded event
- *
- * @param src_ip source IPv4 address
- */
-void
-snat_ipfix_logging_max_entries_per_user(u32 src_ip)
-{
-  //TODO: This event SHOULD be rate limited
-  snat_ipfix_logging_max_entries_per_user_args_t a;
-
-  a.src_ip = src_ip;
-
-  vl_api_rpc_call_main_thread (snat_ipfix_logging_max_entries_per_usr_rpc_cb,
-                               (u8 *) &a, sizeof (a));
-}
-
-vlib_frame_t *
-snat_data_callback_max_entries_per_usr (flow_report_main_t * frm,
-                                        flow_report_t * fr,
-                                        vlib_frame_t * f,
-                                        u32 * to_next,
-                                        u32 node_index)
-{
-  snat_ipfix_logging_max_entries_per_usr(0, 1);
-  return f;
-}
-
-/**
- * @brief Enable/disable SNAT IPFIX logging
- *
- * @param enable    1 if enable, 0 if disable
- * @param domain_id observation domain ID
- * @param src_port  source port number
- *
- * @returns 0 if success
- */
-int
-snat_ipfix_logging_enable_disable (int enable, u32 domain_id, u16 src_port)
-{
-  snat_main_t * sm = &snat_main;
-  snat_ipfix_logging_main_t *silm = &snat_ipfix_logging_main;
-  flow_report_main_t *frm = &flow_report_main;
-  vnet_flow_report_add_del_args_t a;
-  int rv;
-  u8 e = enable ? 1 : 0;
-
-  if (silm->enabled == e)
-    return 0;
-
-  silm->enabled = e;
-
-  memset (&a, 0, sizeof (a));
-  a.is_add = enable;
-  a.domain_id = domain_id ? domain_id : 1;
-  a.src_port = src_port ? src_port : UDP_DST_PORT_ipfix;
-
-  if (sm->deterministic)
-    {
-      a.rewrite_callback = snat_template_rewrite_max_entries_per_usr;
-      a.flow_data_callback = snat_data_callback_max_entries_per_usr;
-
-      rv = vnet_flow_report_add_del (frm, &a, NULL);
-      if (rv)
-        {
-          clib_warning ("vnet_flow_report_add_del returned %d", rv);
-          return -1;
-        }
-    }
-  else
-    {
-      a.rewrite_callback = snat_template_rewrite_nat44_session;
-      a.flow_data_callback = snat_data_callback_nat44_session;
-
-      rv = vnet_flow_report_add_del (frm, &a, NULL);
-      if (rv)
-        {
-          clib_warning ("vnet_flow_report_add_del returned %d", rv);
-          return -1;
-        }
-
-      a.rewrite_callback = snat_template_rewrite_addr_exhausted;
-      a.flow_data_callback = snat_data_callback_addr_exhausted;
-
-      rv = vnet_flow_report_add_del (frm, &a, NULL);
-      if (rv)
-        {
-          clib_warning ("vnet_flow_report_add_del returned %d", rv);
-          return -1;
-        }
-    }
-
-  return 0;
-}
-
-/**
- * @brief Initialize SNAT IPFIX logging
- *
- * @param vm vlib main
- */
-void
-snat_ipfix_logging_init (vlib_main_t * vm)
-{
-  snat_ipfix_logging_main_t *silm = &snat_ipfix_logging_main;
-
-  silm->enabled = 0;
-
-  /* Set up time reference pair */
-  silm->vlib_time_0 = vlib_time_now (vm);
-  silm->milisecond_time_0 = unix_time_now_nsec () * 1e-6;
-}