decomp/schemes/tcp_sack.c File Reference

Handle decoding of TCP Selective ACKnowledgement (SACK) option. More...

#include "tcp_sack.h"
#include "rohc_utils.h"

Include dependency graph for decomp/schemes/tcp_sack.c:

Functions
static int	d_tcp_sack_block (const struct rohc_decomp_ctxt *const context, const uint8_t *const data, const size_t data_len, sack_block_t *const sack_block)
	Parse a SACK block of the TCP SACK option. More...
static int	d_tcp_sack_pure_lsb (const struct rohc_decomp_ctxt *const context, const uint8_t *const data, const size_t data_len, uint32_t *const sack_field)
	Parse a SACK field of a SACK block of the TCP SACK option. More...
int	d_tcp_sack_parse (const struct rohc_decomp_ctxt *const context, const uint8_t *const data, const size_t data_len, struct d_tcp_opt_sack *const opt_sack)
	Parse the SACK TCP option. More...

Detailed Description

Handle decoding of TCP Selective ACKnowledgement (SACK) option.

Author

FWX rohc_.nosp@m.team.nosp@m.@dial.nosp@m.ine..nosp@m.fr

Didier Barvaux didie.nosp@m.r@ba.nosp@m.rvaux.nosp@m..org

Didier Barvaux didie.nosp@m.r.ba.nosp@m.rvaux.nosp@m.@tou.nosp@m.louse.nosp@m..viv.nosp@m.eris..nosp@m.com

Function Documentation

static int d_tcp_sack_block ( const struct rohc_decomp_ctxt *const  context, const uint8_t *const  data, const size_t  data_len, sack_block_t *const  sack_block  )

static

Parse a SACK block of the TCP SACK option.

See RFC6846 page 68 (and RFC2018 for Selective Acknowledgement option)

Parameters

	context	The decompression context
	data	The data to parse
	data_len	The length of the data to parse
[out]	sack_block	The SACK block bits extracted from ROHC packet

Returns

The number of data bytes parsed, -1 if data is malformed

int d_tcp_sack_parse	(	const struct rohc_decomp_ctxt *const	context,
		const uint8_t *const	data,
		const size_t	data_len,
		struct d_tcp_opt_sack *const	opt_sack
	)

Parse the SACK TCP option.

See RFC6846 page 68 (and RFC2018 for Selective Acknowledgement option)

Parameters

	context	The decompression context
	data	The ROHC data to parse
	data_len	The length of the ROHC data to parse
[out]	opt_sack	The information of SACK option extracted from the packet

Returns

The number of ROHC bytes parsed, -1 if packet is malformed

static int d_tcp_sack_pure_lsb ( const struct rohc_decomp_ctxt *const  context, const uint8_t *const  data, const size_t  data_len, uint32_t *const  sack_field  )

static

Parse a SACK field of a SACK block of the TCP SACK option.

See RFC6846 page 67 (and RFC2018 for Selective Acknowledgement option)

Parameters

	context	The decompression context
	data	The ROHC data to parse
	data_len	The length of the ROHC data to parse
[out]	sack_field	The uncompressed SACK field

Returns

The number of data bytes parsed, -1 if data is malformed