gr::digital::crc32_bb Class Reference

Byte-stream CRC block. More...

#include <crc32_bb.h>

Inheritance diagram for gr::digital::crc32_bb:

Public Types
typedef boost::shared_ptr < crc32_bb >	sptr

Static Public Member Functions
static sptr	make (bool check=false, const std::string &lengthtagname="packet_len")

Additional Inherited Members
Public Member Functions inherited from gr::tagged_stream_block
void	forecast (int noutput_items, gr_vector_int &ninput_items_required)
	Don't override this. More...
int	general_work (int noutput_items, gr_vector_int &ninput_items, gr_vector_const_void_star &input_items, gr_vector_void_star &output_items)
virtual int	work (int noutput_items, gr_vector_int &ninput_items, gr_vector_const_void_star &input_items, gr_vector_void_star &output_items)=0
	Just like gr::block::general_work, but makes sure the input is valid. More...
Protected Types inherited from gr::basic_block
enum	vcolor { WHITE, GREY, BLACK }
Protected Member Functions inherited from gr::tagged_stream_block
	tagged_stream_block (void)
	tagged_stream_block (const std::string &name, gr::io_signature::sptr input_signature, gr::io_signature::sptr output_signature, const std::string &length_tag_key)
virtual void	parse_length_tags (const std::vector< std::vector< tag_t > > &tags, gr_vector_int &n_input_items_reqd)
	Parse all tags on the first sample of a PDU, return the number of items per input and prune the length tags. More...
virtual int	calculate_output_stream_length (const gr_vector_int &ninput_items)
	Calculate the number of output items. More...
virtual void	update_length_tags (int n_produced, int n_ports)
	Set the new length tags on the output stream. More...
Protected Attributes inherited from gr::tagged_stream_block
std::string	d_length_tag_key_str

Detailed Description

Byte-stream CRC block.

Input: stream of bytes, which form a packet. The first byte of the packet has a tag with key "length" and the value being the number of bytes in the packet.

Output: The same bytes as incoming, but trailing a CRC32 of the packet. The tag is re-set to the new length.

Member Typedef Documentation

typedef boost::shared_ptr<crc32_bb> gr::digital::crc32_bb::sptr

Member Function Documentation

static sptr gr::digital::crc32_bb::make ( bool  check = false, const std::string &  lengthtagname = "packet_len"  )

static

Parameters

check	Set to true if you want to check CRC, false to create CRC.
lengthtagname	Length tag key

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The documentation for this class was generated from the following file:

• crc32_bb.h