+nat44_ed_session_reopen (u32 thread_index, snat_session_t *s)
+{
+ nat_syslog_nat44_sdel (0, s->in2out.fib_index, &s->in2out.addr,
+ s->in2out.port, &s->ext_host_nat_addr,
+ s->ext_host_nat_port, &s->out2in.addr, s->out2in.port,
+ &s->ext_host_addr, s->ext_host_port, s->proto,
+ nat44_ed_is_twice_nat_session (s));
+
+ nat_ipfix_logging_nat44_ses_delete (
+ thread_index, s->in2out.addr.as_u32, s->out2in.addr.as_u32, s->proto,
+ s->in2out.port, s->out2in.port, s->in2out.fib_index);
+ nat_ipfix_logging_nat44_ses_create (
+ thread_index, s->in2out.addr.as_u32, s->out2in.addr.as_u32, s->proto,
+ s->in2out.port, s->out2in.port, s->in2out.fib_index);
+
+ nat_syslog_nat44_sadd (0, s->in2out.fib_index, &s->in2out.addr,
+ s->in2out.port, &s->ext_host_nat_addr,
+ s->ext_host_nat_port, &s->out2in.addr, s->out2in.port,
+ &s->ext_host_addr, s->ext_host_port, s->proto, 0);
+ s->total_pkts = 0;
+ s->total_bytes = 0;
+}
+
+/*
+ * "Some rise by SYN, and some by virtue FIN" - William Shakespeare
+ * TCP state tracking patterned after RFC 7857 (and RFC 6146, which is
+ * referenced by RFC 7857). In contrast to the state machine in RFC7857 we only
+ * transition to ESTABLISHED state after seeing a full 3-way handshake (SYNs
+ * and ACKs in both directions). RFC7857 as a means of protecting against
+ * spurious RSTs closing a session, goes back to ESTABLISHED if a data packet
+ * is received after the RST. This state machine will leave the state in
+ * transitory if RST is seen. Our implementation also goes beyond by supporting
+ * creation of a new session while old session is in transitory timeout after
+ * seeing FIN packets from both sides.
+ */
+always_inline void
+nat44_set_tcp_session_state (snat_main_t *sm, f64 now, snat_session_t *ses,
+ u8 tcp_flags, u32 thread_index,
+ nat44_ed_dir_e dir)