fixes #1230 NNG_OPT_RECONNMAXT zero does not prevent exponential back…

…-off

src/core/socket.c

@@ -1375,26 +1375,28 @@ nni_ctx_setopt(
 static void
 dialer_timer_start_locked(nni_dialer *d)
 {
-	nni_duration backoff;
+	nni_duration back_off;
 	nni_sock *   sock = d->d_sock;
 
 	if (d->d_closing || sock->s_closed) {
 		return;
 	}
-	backoff = d->d_currtime;
-	d->d_currtime *= 2;
-	if ((d->d_maxrtime > 0) && (d->d_currtime > d->d_maxrtime)) {
-		d->d_currtime = d->d_maxrtime;
+	back_off = d->d_currtime;
+	if (d->d_maxrtime > 0) {
+		d->d_currtime *= 2;
+		if (d->d_currtime > d->d_maxrtime) {
+			d->d_currtime = d->d_maxrtime;
+		}
 	}
 
-	// To minimize damage from storms, etc., we select a backoff
-	// value randomly, in the range of [0, backoff-1]; this is
-	// pretty similar to 802 style backoff, except that we have a
+	// To minimize damage from storms, etc., we select a back-off
+	// value randomly, in the range of [0, back_off-1]; this is
+	// pretty similar to 802 style back-off, except that we have a
 	// nearly uniform time period instead of discrete slot times.
 	// This algorithm may lead to slight biases because we don't
 	// have a statistically perfect distribution with the modulo of
 	// the random number, but this really doesn't matter.
-	nni_sleep_aio(backoff ? nni_random() % backoff : 0, d->d_tmo_aio);
+	nni_sleep_aio(back_off ? nni_random() % back_off : 0, d->d_tmo_aio);
 }
 
 void