tls: Use real timestamp functions in process context

Fix x509_get_current_time() and ttls_tickets_configure() to use
  tfw_current_timestamp_real() instead of cached softirq-only functions.

Author: MorganaFuture

tls/tls_ticket.c

@@ -357,7 +357,7 @@ ttls_tickets_configure(TlsPeerCfg *cfg, unsigned long lifetime,
 	}
 
 	timer_setup(&tcfg->timer, ttls_ticket_rotate_keys, 0);
-	tfw_current_timestamp_ts64(&ts);
+	tfw_current_timestamp_real(&ts);
 	secs = tcfg->lifetime - (ts.tv_sec % tcfg->lifetime);
 	mod_timer(&tcfg->timer, jiffies + msecs_to_jiffies(secs * 1000));
 

tls/x509.c

@@ -709,8 +709,10 @@ static void
 x509_get_current_time(ttls_x509_time *now)
 {
 	struct tm t;
+	struct timespec64 ts;
 
-	time64_to_tm(tfw_current_timestamp(), 0, &t);
+	tfw_current_timestamp_real(&ts);
+	time64_to_tm(ts.tv_sec, 0, &t);
 
 	now->year = t.tm_year + 1900;
 	now->mon  = t.tm_mon  + 1;