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-rw-r--r--src/plugins/nat/nat_ipfix_logging.c835
1 files changed, 835 insertions, 0 deletions
diff --git a/src/plugins/nat/nat_ipfix_logging.c b/src/plugins/nat/nat_ipfix_logging.c
new file mode 100644
index 00000000000..0cc0f82a337
--- /dev/null
+++ b/src/plugins/nat/nat_ipfix_logging.c
@@ -0,0 +1,835 @@
+/*
+ * nat_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 <nat/nat.h>
+#include <nat/nat_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 NAT 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 NAT 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 NAT plugin 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 NAT plugin 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;
+}