Binkp control frames can be NULL terminated.

app/Classes/Protocol/Binkp.php

@@ -431,7 +431,8 @@ final class Binkp extends BaseProtocol
 						$rc = TRUE;
 
 					} else {
-						$data = substr($this->rx_buf,1);
+						// http://ftsc.org/docs/fts-1026.001 - frames may be NULL terminated
+						$data = rtrim(substr($this->rx_buf,1),"\x00");
 
 						switch ($msg) {
 							case self::BPM_ADR:
@@ -1224,7 +1225,8 @@ final class Binkp extends BaseProtocol
 	}
 
 	/**
-	 * @throws \Exception
+	 * @todo It appears when we poll a node, we dont ask for passwords, but we still send echomail and files.
+	 * @todo We should only send netmail if unauthenticated
 	 */
 	private function M_pwd(string $buf): bool
 	{