The generic decompression context. More...

#include <d_generic.h>

Collaboration diagram for d_generic_context:

Data Fields
struct d_generic_changes *	outer_ip_changes
	Information about the outer IP header.
struct d_generic_changes *	inner_ip_changes
	Information about the inner IP header.
struct rohc_lsb_decode *	sn_lsb_ctxt
	The LSB decoding context for the Sequence Number (SN)
struct ip_id_offset_decode *	outer_ip_id_offset_ctxt
	The IP-ID of the outer IP header.
struct ip_id_offset_decode *	inner_ip_id_offset_ctxt
	The IP-ID of the inner IP header.
struct list_decomp	list_decomp1
	The list decompressor of the outer IP header.
struct list_decomp	list_decomp2
	The list decompressor of the inner IP header.
int	multiple_ip
	Whether the decompressed packet contains a 2nd IP header.
unsigned short	next_header_proto
	The IP protocol ID of the protocol the context is able to decompress.
unsigned int	next_header_len
	The length of the next header.
int(*	parse_static_next_hdr )(const struct rohc_decomp_ctxt const context, const unsigned char 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.
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.
int(*	parse_ext3 )(const struct rohc_decomp_ctxt const context, const unsigned char 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.
int(*	parse_uo_remainder )(const struct rohc_decomp_ctxt const context, const unsigned char packet, unsigned int length, struct rohc_extr_bits *const bits)
	The handler used to parse the tail of the UO* ROHC packet.
bool(*	decode_values_from_bits )(const struct rohc_decomp_ctxt context, const struct rohc_extr_bits bits, struct rohc_decoded_values const decoded)
int(*	build_next_header )(const struct rohc_decomp_ctxt const context, const struct rohc_decoded_values decoded, unsigned char 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.
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.
void(*	update_context )(const struct rohc_decomp_ctxt *context, const struct rohc_decoded_values decoded)
void *	specific
	Profile-specific data.
rohc_decomp_crc_corr_t	crc_corr
size_t	correction_counter
struct rohc_ts	arrival_times [ROHC_MAX_ARRIVAL_TIMES]
size_t	arrival_times_nr
size_t	arrival_times_index
struct rohc_ts	cur_arrival_time

Detailed Description

The generic decompression context.

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

struct rohc_ts d_generic_context::arrival_times[ROHC_MAX_ARRIVAL_TIMES]

The arrival times for the last packets

size_t d_generic_context::arrival_times_index

The index for the arrival time of the next packet

size_t d_generic_context::arrival_times_nr

The number of arrival times in arrival_times

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

The handler used to build the uncompressed next header

uint8_t(* d_generic_context::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.

uint8_t(* d_generic_context::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.

size_t d_generic_context::correction_counter

Correction counter (see e and f in 5.3.2.2.4 of the RFC 3095)

rohc_decomp_crc_corr_t d_generic_context::crc_corr

The algorithm being used for correction CRC failure

struct rohc_ts d_generic_context::cur_arrival_time

The arrival time of the current packet

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

The handler used to decode extracted for next header

struct d_generic_changes* d_generic_context::inner_ip_changes

Information about the inner IP header.

struct ip_id_offset_decode* d_generic_context::inner_ip_id_offset_ctxt

The IP-ID of the inner IP header.

struct list_decomp d_generic_context::list_decomp1

The list decompressor of the outer IP header.

struct list_decomp d_generic_context::list_decomp2

The list decompressor of the inner IP header.

int d_generic_context::multiple_ip

Whether the decompressed packet contains a 2nd IP header.

unsigned int d_generic_context::next_header_len

The length of the next header.

unsigned short d_generic_context::next_header_proto

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

struct d_generic_changes* d_generic_context::outer_ip_changes

Information about the outer IP header.

struct ip_id_offset_decode* d_generic_context::outer_ip_id_offset_ctxt

The IP-ID of the outer IP header.

int(* d_generic_context::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.

int(* d_generic_context::parse_ext3)(const struct rohc_decomp_ctxt *const context, const unsigned char *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

int(* d_generic_context::parse_static_next_hdr)(const struct rohc_decomp_ctxt *const context, const unsigned char *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.

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

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

struct rohc_lsb_decode* d_generic_context::sn_lsb_ctxt

The LSB decoding context for the Sequence Number (SN)

void* d_generic_context::specific

Profile-specific data.

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

The handler used to update context with decoded next header fields

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

d_generic.h

Data Fields

Detailed Description

Field Documentation