Packet Header Parser (Default): Difference between revisions

From GNU Radio
Jump to navigation Jump to search
(Created page with "Category:Block Docs Category:Stub Docs This is the template for the "Page-per-block Docs". This first section should describe what the block...")
 
No edit summary
 
(2 intermediate revisions by one other user not shown)
Line 1: Line 1:
[[Category:Block Docs]]
[[Category:Block Docs]]
[[Category:Stub Docs]]
Post header metadata as a PMT. In a sense, this is the inverse block to [[Packet Header Generator (Default)]]. The difference is, the parsed header is not output as a stream, but as a PMT dictionary, which is published to message port with the id "header_data".  
This is the template for the [[:Category:Block_Docs|"Page-per-block Docs"]]. This first section should describe what the block does and how to use it, using however many paragraphs necessary. Note that the title of the wiki page should match the block's name in GRC, i.e. the one defined in the block's .grc file.  Look at the [[FFT]] Block for a good example.
 
The dictionary consists of the tags created by the header formatter object, as well as the tags already present at the input of this block.
Note that if several tags (created and already present) have the same key (name), only one, the last, will be output. And that may cause conflicts that are hard to investigate.


As this is a basic template, it's also in the [[:Category:Stub_Docs|"Stub Docs category"]]. Please improve it.


== Parameters ==
== Parameters ==
(''R''): <span class="plainlinks">[https://wiki.gnuradio.org/index.php/GNURadioCompanion#Variable_Controls ''Run-time adjustable'']</span>
; Header Length
 
: Number of bytes per header
; Param 1 (''R'')
: Description of parameter, provide any tips or recommended values.  Note that the name of the parameter above should match the param's label that shows up in grc (e.g. Sample Rate).


; Param 2
; Length Tag Name
: blah blah blah
: Length Tag Key


== Example Flowgraph ==
== Example Flowgraph ==
Line 21: Line 20:


; C++ files
; C++ files
: [https://github.com/gnuradio/gnuradio TODO]
: [https://github.com/gnuradio/gnuradio/blob/master/gr-digital/lib/packet_headerparser_b_impl.cc]


; Header files
; Header files
: [https://github.com/gnuradio/gnuradio TODO]
: [https://github.com/gnuradio/gnuradio/blob/master/gr-digital/lib/packet_headerparser_b_impl.h]


; Public header files
; Public header files
: [https://github.com/gnuradio/gnuradio TODO]
: [https://github.com/gnuradio/gnuradio/blob/master/gr-digital/include/gnuradio/digital/packet_headerparser_b.h]


; Block definition
; Block definition
: [https://github.com/gnuradio/gnuradio TODO]
: [https://github.com/gnuradio/gnuradio/blob/master/gr-digital/grc/digital_packet_headerparser_b.block.yml]

Latest revision as of 13:53, 8 August 2023

Post header metadata as a PMT. In a sense, this is the inverse block to Packet Header Generator (Default). The difference is, the parsed header is not output as a stream, but as a PMT dictionary, which is published to message port with the id "header_data".

The dictionary consists of the tags created by the header formatter object, as well as the tags already present at the input of this block. Note that if several tags (created and already present) have the same key (name), only one, the last, will be output. And that may cause conflicts that are hard to investigate.


Parameters

Header Length
Number of bytes per header
Length Tag Name
Length Tag Key

Example Flowgraph

Insert description of flowgraph here, then show a screenshot of the flowgraph and the output if there is an interesting GUI. Currently we have no standard method of uploading the actual flowgraph to the wiki or git repo, unfortunately. The plan is to have an example flowgraph showing how the block might be used, for every block, and the flowgraphs will live in the git repo.

Source Files

C++ files
[1]
Header files
[2]
Public header files
[3]
Block definition
[4]
Retrieved from "https://wiki.gnuradio.org/index.php?title=Packet_Header_Parser_(Default)&oldid=13301"