[Discuss-gnuradio] question about headr_payload_demux module

[Tiankun Hu]

Hi all,
I am reading "header_payload_demux" module, I have some questions about it.
1, in "header_payload_demux_impl.cc" line 235, seems need update nread's 
value
        nread += trigger_offset;
    I think  without this update, the first header will check failed, 
if input data not include 	 complete "d_header_len" ofdm symbols

2, why in "case STATE_HEADER_RX_FAIL:" line 218, need consume one input 
item?

3, does the control message's handler function can disturb 
"general_work"(like a soft interrupt)?, or these handler only run 
before/after "general_work".

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Thanks
Tiankun