tcp_sack.h File Reference

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

#include "rohc_comp_internals.h"
#include "protocols/tcp.h"
#include <stddef.h>
#include <stdint.h>

Include dependency graph for comp/schemes/tcp_sack.h:

Functions
int	c_tcp_opt_sack_code (const struct rohc_comp_ctxt const context, const uint32_t ack_value, const sack_block_t const sack_blocks, const uint8_t length, const bool is_unchanged, uint8_t *const rohc_data, const size_t rohc_max_len)
	Compress one TCP Selective ACKnowledgement (SACK) option.

Detailed Description

Handle encoding of TCP Selective ACKnowledgement (SACK) option.

int c_tcp_opt_sack_code	(	const struct rohc_comp_ctxt *const	context,
		const uint32_t	ack_value,
		const sack_block_t *const	sack_blocks,
		const uint8_t	length,
		const bool	is_unchanged,
		uint8_t *const	rohc_data,
		const size_t	rohc_max_len
	)

Compress one TCP Selective ACKnowledgement (SACK) option.

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

Parameters:

	context	The compression context
	ack_value	The ack value
	sack_blocks	The SACK blocks to compress
	length	The length of the SACK blocks
	is_unchanged	Whether the SACK option is unchanged or not (only for irregular chain, use false for list item)
`[out]`	rohc_data	The ROHC packet being built
	rohc_max_len	The max remaining length in the ROHC buffer

Returns:: The length appended in the ROHC buffer if positive, -1 in case of error