The generic decompression context for RFC3095-based profiles. More...

#include <rohc_decomp_rfc3095.h>

Collaboration diagram for rohc_decomp_rfc3095_ctxt:

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Data Fields
struct rohc_decomp_rfc3095_changes *	outer_ip_changes
	Information about the outer IP header. More...

struct rohc_decomp_rfc3095_changes *	inner_ip_changes
	Information about the inner IP header. More...

rohc_lsb_shift_t	sn_lsb_p

struct rohc_lsb_decode	sn_lsb_ctxt
	The LSB decoding context for the Sequence Number (SN) More...

struct ip_id_offset_decode	outer_ip_id_offset_ctxt
	The IP-ID of the outer IP header. More...

struct ip_id_offset_decode	inner_ip_id_offset_ctxt
	The IP-ID of the inner IP header. More...

struct list_decomp	list_decomp1
	The list decompressor of the outer IP header. More...

struct list_decomp	list_decomp2
	The list decompressor of the inner IP header. More...

int	multiple_ip
	Whether the decompressed packet contains a 2nd IP header. More...

bool	is_crc_static_3_cached_valid

uint8_t	crc_static_3_cached

bool	is_crc_static_7_cached_valid

uint8_t	crc_static_7_cached

unsigned short	next_header_proto
	The IP protocol ID of the protocol the context is able to decompress. More...

unsigned int	next_header_len
	The length of the next header. More...

int(*	parse_static_next_hdr )(const struct rohc_decomp_ctxt const context, const uint8_t packet, size_t length, struct rohc_extr_bits *const bits)
	The handler used to parse the static part of the next header in the ROHC packet. More...

int(*	parse_dyn_next_hdr )(const struct rohc_decomp_ctxt const context, const uint8_t packet, const size_t length, struct rohc_extr_bits *const bits)
	The handler used to parse the dynamic part of the next header in the ROHC packet. More...

int(*	parse_ext3 )(const struct rohc_decomp_ctxt const context, const uint8_t const rohc_data, const size_t rohc_data_len, const rohc_packet_t packet_type, struct rohc_extr_bits *const bits)
	The handler used to parse the extension 3 of the UO* ROHC packet. More...

int(*	parse_uo_remainder )(const struct rohc_decomp_ctxt const context, const uint8_t packet, unsigned int length, struct rohc_extr_bits *const bits)
	The handler used to parse the tail of the UO* ROHC packet. More...

bool(*	decode_values_from_bits )(const struct rohc_decomp_ctxt context, const struct rohc_extr_bits const bits, struct rohc_decoded_values *const decoded)

int(*	build_next_header )(const struct rohc_decomp_ctxt const context, const struct rohc_decoded_values const decoded, uint8_t *const dest, const unsigned int payload_len)

uint8_t(*	compute_crc_static )(const uint8_t const ip, const uint8_t const ip2, const uint8_t const next_header, const rohc_crc_type_t crc_type, const uint8_t init_val, const uint8_t const crc_table)
	The handler used to compute the CRC-STATIC value. More...

uint8_t(*	compute_crc_dynamic )(const uint8_t const ip, const uint8_t const ip2, const uint8_t const next_header, const rohc_crc_type_t crc_type, const uint8_t init_val, const uint8_t const crc_table)
	The handler used to compute the CRC-DYNAMIC value. More...

void(*	update_context )(struct rohc_decomp_ctxt const context, const struct rohc_decoded_values const decoded)

void *	specific
	Profile-specific data. More...

Detailed Description

The generic decompression context for RFC3095-based profiles.

The object defines the generic context that manages IP(/nextheader) and IP/IP(/nextheader) packets. nextheader is managed by the profile-specific part of the context.

Field Documentation

◆ build_next_header

int(* rohc_decomp_rfc3095_ctxt::build_next_header) (const struct rohc_decomp_ctxt *const context, const struct rohc_decoded_values *const decoded, uint8_t *const dest, const unsigned int payload_len)

The handler used to build the uncompressed next header

◆ compute_crc_dynamic

uint8_t(* rohc_decomp_rfc3095_ctxt::compute_crc_dynamic) (const uint8_t *const ip, const uint8_t *const ip2, const uint8_t *const next_header, const rohc_crc_type_t crc_type, const uint8_t init_val, const uint8_t *const crc_table)

The handler used to compute the CRC-DYNAMIC value.

◆ compute_crc_static

uint8_t(* rohc_decomp_rfc3095_ctxt::compute_crc_static) (const uint8_t *const ip, const uint8_t *const ip2, const uint8_t *const next_header, const rohc_crc_type_t crc_type, const uint8_t init_val, const uint8_t *const crc_table)

The handler used to compute the CRC-STATIC value.

◆ crc_static_3_cached

uint8_t rohc_decomp_rfc3095_ctxt::crc_static_3_cached

The cache for the CRC-3 value on CRC-STATIC fields

◆ crc_static_7_cached

uint8_t rohc_decomp_rfc3095_ctxt::crc_static_7_cached

The cache for the CRC-7 value on CRC-STATIC fields

◆ decode_values_from_bits

bool(* rohc_decomp_rfc3095_ctxt::decode_values_from_bits) (const struct rohc_decomp_ctxt *context, const struct rohc_extr_bits *const bits, struct rohc_decoded_values *const decoded)

The handler used to decode extracted for next header

◆ inner_ip_changes

struct rohc_decomp_rfc3095_changes* rohc_decomp_rfc3095_ctxt::inner_ip_changes

Information about the inner IP header.

◆ inner_ip_id_offset_ctxt

struct ip_id_offset_decode rohc_decomp_rfc3095_ctxt::inner_ip_id_offset_ctxt

The IP-ID of the inner IP header.

◆ is_crc_static_3_cached_valid

bool rohc_decomp_rfc3095_ctxt::is_crc_static_3_cached_valid

Whether the cache for the CRC-3 value on CRC-STATIC fields is initialized or not

◆ is_crc_static_7_cached_valid

bool rohc_decomp_rfc3095_ctxt::is_crc_static_7_cached_valid

Whether the cache for the CRC-7 value on CRC-STATIC fields is initialized or not

◆ list_decomp1

struct list_decomp rohc_decomp_rfc3095_ctxt::list_decomp1

The list decompressor of the outer IP header.

◆ list_decomp2

struct list_decomp rohc_decomp_rfc3095_ctxt::list_decomp2

The list decompressor of the inner IP header.

◆ multiple_ip

int rohc_decomp_rfc3095_ctxt::multiple_ip

Whether the decompressed packet contains a 2nd IP header.

◆ next_header_len

unsigned int rohc_decomp_rfc3095_ctxt::next_header_len

The length of the next header.

◆ next_header_proto

unsigned short rohc_decomp_rfc3095_ctxt::next_header_proto

The IP protocol ID of the protocol the context is able to decompress.

◆ outer_ip_changes

struct rohc_decomp_rfc3095_changes* rohc_decomp_rfc3095_ctxt::outer_ip_changes

Information about the outer IP header.

◆ outer_ip_id_offset_ctxt

struct ip_id_offset_decode rohc_decomp_rfc3095_ctxt::outer_ip_id_offset_ctxt

The IP-ID of the outer IP header.

◆ parse_dyn_next_hdr

int(* rohc_decomp_rfc3095_ctxt::parse_dyn_next_hdr) (const struct rohc_decomp_ctxt *const context, const uint8_t *packet, const size_t length, struct rohc_extr_bits *const bits)

The handler used to parse the dynamic part of the next header in the ROHC packet.

◆ parse_ext3

int(* rohc_decomp_rfc3095_ctxt::parse_ext3) (const struct rohc_decomp_ctxt *const context, const uint8_t *const rohc_data, const size_t rohc_data_len, const rohc_packet_t packet_type, struct rohc_extr_bits *const bits)

The handler used to parse the extension 3 of the UO* ROHC packet.

Parameters

context	The decompression context
rohc_data	The ROHC data to parse
rohc_data_len	The length of the ROHC data to parse
packet_type	The type of ROHC packet to parse
bits	IN: the bits already found in base header OUT: the bits found in the extension header 3

Returns: The data length read from the ROHC packet, -2 in case packet must be reparsed, -1 in case of error

◆ parse_static_next_hdr

int(* rohc_decomp_rfc3095_ctxt::parse_static_next_hdr) (const struct rohc_decomp_ctxt *const context, const uint8_t *packet, size_t length, struct rohc_extr_bits *const bits)

The handler used to parse the static part of the next header in the ROHC packet.

◆ parse_uo_remainder

int(* rohc_decomp_rfc3095_ctxt::parse_uo_remainder) (const struct rohc_decomp_ctxt *const context, const uint8_t *packet, unsigned int length, struct rohc_extr_bits *const bits)

The handler used to parse the tail of the UO* ROHC packet.

◆ sn_lsb_ctxt

struct rohc_lsb_decode rohc_decomp_rfc3095_ctxt::sn_lsb_ctxt

The LSB decoding context for the Sequence Number (SN)

◆ sn_lsb_p

rohc_lsb_shift_t rohc_decomp_rfc3095_ctxt::sn_lsb_p

The LSB shift parameter for the Sequence Number (SN)

◆ specific

void* rohc_decomp_rfc3095_ctxt::specific

Profile-specific data.

◆ update_context

void(* rohc_decomp_rfc3095_ctxt::update_context) (struct rohc_decomp_ctxt *const context, const struct rohc_decoded_values *const decoded)

The handler used to update context with decoded next header fields

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

rohc_decomp_rfc3095.h

Data Fields