<block> <name>Packet Header Parser</name> <key>digital_packet_headerparser_b</key> <import>from gnuradio import digital</import> <make>digital.packet_headerparser_b($header_formatter)</make> <param> <name>Formatter Object</name> <key>header_formatter</key> <type>raw</type> </param> <sink> <name>in</name> <type>byte</type> </sink> <source> <name>header_data</name> <type>message</type> </source> </block>