nat: report time between current vpp time and last_heard

existing details report the last_heard as the seconds since VPP
started, this is not very useful, so report additionaly
time_since_last_heard in seconds between VPP time and
last_heard.

Change-Id: Ifd34b1449e57919242b1f0e22156d3590af3c738
Type: improvement
Signed-off-by: Dave Cornejo <dcornejo@netgate.com>
Signed-off-by: Vladimir Ratnikov <vratnikov@netgate.com>

2 files changed, 137 insertions, 0 deletions

diff --git a/src/plugins/nat/nat44-ed/nat44_ed.api b/src/plugins/nat/nat44-ed/nat44_ed.api
index 88496a3f16e..f0bcae92687 100644
--- a/src/plugins/nat/nat44-ed/nat44_ed.api
+++ b/src/plugins/nat/nat44-ed/nat44_ed.api
@@ -901,6 +901,62 @@ define nat44_user_session_v2_details {
   bool is_timed_out;
 };
 
+/** \brief NAT44 user's sessions response
+    @param context - sender context, to match reply w/ request
+    @param outside_ip_address - outside IPv4 address
+    @param outside_port - outside port
+    @param inside_ip_address - inside IPv4 address
+    @param inside_port - inside port
+    @param protocol - protocol
+    @param flags - flag NAT_IS_STATIC if session is static,
+                   flag NAT_IS_TWICE_NAT if session is twice-nat,
+                   flag NAT_IS_EXT_HOST_VALID if external host address
+                   and port are valid
+    @param last_heard - last heard timer since VPP start
+    @param time_since_last_heard - difference between current vpp time and last_heard value
+    @param total_bytes - count of bytes sent through session
+    @param total_pkts - count of pakets sent through session
+    @param ext_host_address - external host IPv4 address
+    @param ext_host_port - external host port
+    @param ext_host_nat_address - post-NAT external host IPv4 address (valid
+                                  only if twice-nat session)
+    @param ext_host_nat_port - post-NAT external host port (valid only if
+                               twice-nat session)
+    @param is_timed_out - true, if session is timed out, and false, if session
+                          is active
+*/
+define nat44_user_session_v3_details {
+  u32 context;
+  vl_api_ip4_address_t outside_ip_address;
+  u16 outside_port;
+  vl_api_ip4_address_t inside_ip_address;
+  u16 inside_port;
+  u16 protocol;
+  vl_api_nat_config_flags_t flags;
+  u64 last_heard;
+  u64 time_since_last_heard;
+  u64 total_bytes;
+  u32 total_pkts;
+  vl_api_ip4_address_t ext_host_address;
+  u16 ext_host_port;
+  vl_api_ip4_address_t ext_host_nat_address;
+  u16 ext_host_nat_port;
+  bool is_timed_out;
+};
+
+/** \brief NAT44 user's sessions
+    @param client_index - opaque cookie to identify the sender
+    @param context - sender context, to match reply w/ request
+    @param ip_address - IPv4 address of the user to dump
+    @param vrf_id - VRF_ID
+*/
+define nat44_user_session_v3_dump {
+  u32 client_index;
+  u32 context;
+  vl_api_ip4_address_t ip_address;
+  u32 vrf_id;
+};
+
 // DEPRECATED, obsolete messages completely unsupported
 
 /** \brief Del NAT44 user
diff --git a/src/plugins/nat/nat44-ed/nat44_ed_api.c b/src/plugins/nat/nat44-ed/nat44_ed_api.c
index c430429947e..139595a6a82 100644
--- a/src/plugins/nat/nat44-ed/nat44_ed_api.c
+++ b/src/plugins/nat/nat44-ed/nat44_ed_api.c
@@ -1535,6 +1535,53 @@ send_nat44_user_session_v2_details (snat_session_t *s,
 }
 
 static void
+send_nat44_user_session_v3_details (snat_session_t *s,
+				    vl_api_registration_t *reg, u32 context)
+{
+  vl_api_nat44_user_session_v3_details_t *rmp;
+  snat_main_t *sm = &snat_main;
+  u64 now = vlib_time_now (vlib_get_main ());
+  u64 sess_timeout_time = 0;
+
+  rmp = vl_msg_api_alloc (sizeof (*rmp));
+  clib_memset (rmp, 0, sizeof (*rmp));
+  rmp->_vl_msg_id =
+    ntohs (VL_API_NAT44_USER_SESSION_V3_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);
+
+  if (nat44_ed_is_session_static (s))
+    rmp->flags |= NAT_API_IS_STATIC;
+
+  if (nat44_ed_is_twice_nat_session (s))
+    rmp->flags |= NAT_API_IS_TWICE_NAT;
+
+  rmp->flags |= NAT_API_IS_EXT_HOST_VALID;
+
+  rmp->last_heard = clib_host_to_net_u64 ((u64) s->last_heard);
+  rmp->time_since_last_heard =
+    clib_host_to_net_u64 ((u64) (now - s->last_heard));
+  rmp->total_bytes = clib_host_to_net_u64 (s->total_bytes);
+  rmp->total_pkts = ntohl (s->total_pkts);
+  rmp->context = context;
+  rmp->outside_port = s->out2in.port;
+  rmp->inside_port = s->in2out.port;
+  rmp->protocol = clib_host_to_net_u16 (s->proto);
+  clib_memcpy (rmp->ext_host_address, &s->ext_host_addr, 4);
+  rmp->ext_host_port = s->ext_host_port;
+  if (nat44_ed_is_twice_nat_session (s))
+    {
+      clib_memcpy (rmp->ext_host_nat_address, &s->ext_host_nat_addr, 4);
+      rmp->ext_host_nat_port = s->ext_host_nat_port;
+    }
+
+  sess_timeout_time = s->last_heard + nat44_session_get_timeout (sm, s);
+  rmp->is_timed_out = (now >= sess_timeout_time);
+
+  vl_api_send_msg (reg, (u8 *) rmp);
+}
+
+static void
 vl_api_nat44_user_session_v2_dump_t_handler (
   vl_api_nat44_user_session_v2_dump_t *mp)
 {
@@ -1568,6 +1615,40 @@ vl_api_nat44_user_session_v2_dump_t_handler (
     }
 }
 
+static void
+vl_api_nat44_user_session_v3_dump_t_handler (
+  vl_api_nat44_user_session_v3_dump_t *mp)
+{
+  snat_main_per_thread_data_t *tsm;
+  snat_main_t *sm = &snat_main;
+  vl_api_registration_t *reg;
+  snat_user_key_t ukey;
+  snat_session_t *s;
+  ip4_header_t ip;
+
+  reg = vl_api_client_index_to_registration (mp->client_index);
+  if (!reg)
+    return;
+
+  clib_memcpy (&ukey.addr, mp->ip_address, 4);
+  ip.src_address.as_u32 = ukey.addr.as_u32;
+  ukey.fib_index = fib_table_find (FIB_PROTOCOL_IP4, ntohl (mp->vrf_id));
+  if (sm->num_workers > 1)
+    tsm = vec_elt_at_index (
+      sm->per_thread_data,
+      nat44_ed_get_in2out_worker_index (0, &ip, ukey.fib_index, 0));
+  else
+    tsm = vec_elt_at_index (sm->per_thread_data, sm->num_workers);
+
+  pool_foreach (s, tsm->sessions)
+    {
+      if (s->in2out.addr.as_u32 == ukey.addr.as_u32)
+	{
+	  send_nat44_user_session_v3_details (s, reg, mp->context);
+	}
+    }
+}
+
 // DEPRECATED, obsolete messages completely unsupported
 
 static void