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.
rohc_packet_t	packet_type
	The type of packet the decompressor may receive: IR, IR-DYN, UO*.
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.
rohc_packet_t(*	detect_packet_type )(struct rohc_decomp decomp, struct d_context context, const unsigned char *packet, const size_t rohc_length, const size_t large_cid_len)
int(*	parse_static_next_hdr )(struct d_generic_context context, const unsigned char packet, unsigned int 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 )(struct d_generic_context context, const unsigned char packet, unsigned int 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_uo_remainder )(struct d_generic_context 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 d_context context, const struct rohc_extr_bits bits, struct rohc_decoded_values const decoded)
int(*	build_next_header )(const struct d_generic_context const context, const struct rohc_decoded_values decoded, unsigned char dest, const unsigned int payload_len)
unsigned int(*	compute_crc_static )(const unsigned char const ip, const unsigned char const ip2, const unsigned char const next_header, const rohc_crc_type_t crc_type, const unsigned int init_val, const unsigned char const crc_table)
	The handler used to compute the CRC-STATIC value.
unsigned int(*	compute_crc_dynamic )(const unsigned char const ip, const unsigned char const ip2, const unsigned char const next_header, const rohc_crc_type_t crc_type, const unsigned int init_val, const unsigned char const crc_table)
	The handler used to compute the CRC-DYNAMIC value.
void(*	update_context )(const struct d_context *context, const struct rohc_decoded_values decoded)
void *	specific
	Profile-specific data.
unsigned int	correction_counter
	Correction counter (see e and f in 5.3.2.2.4 of the RFC 3095)

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

int(* d_generic_context::build_next_header)(const struct d_generic_context *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

Referenced by d_udp_create(), and d_udp_lite_create().

unsigned int(* d_generic_context::compute_crc_dynamic)(const unsigned char *const ip, const unsigned char *const ip2, const unsigned char *const next_header, const rohc_crc_type_t crc_type, const unsigned int init_val, const unsigned char *const crc_table)

The handler used to compute the CRC-DYNAMIC value.

Referenced by d_generic_create(), d_udp_create(), and d_udp_lite_create().

unsigned int(* d_generic_context::compute_crc_static)(const unsigned char *const ip, const unsigned char *const ip2, const unsigned char *const next_header, const rohc_crc_type_t crc_type, const unsigned int init_val, const unsigned char *const crc_table)

The handler used to compute the CRC-STATIC value.

Referenced by d_generic_create(), d_udp_create(), and d_udp_lite_create().

unsigned int d_generic_context::correction_counter

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

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

The handler used to decode extracted for next header

Referenced by d_udp_create(), and d_udp_lite_create().

rohc_packet_t(* d_generic_context::detect_packet_type)(struct rohc_decomp *decomp, struct d_context *context, const unsigned char *packet, const size_t rohc_length, const size_t large_cid_len)

The handler used to detect the packet type

Referenced by d_generic_decode(), d_ip_create(), d_udp_create(), and d_udp_lite_create().

struct d_generic_changes* d_generic_context::inner_ip_changes

Information about the inner IP header.

Referenced by d_generic_create(), d_generic_destroy(), d_udp_create(), and d_udp_lite_create().

struct ip_id_offset_decode* d_generic_context::inner_ip_id_offset_ctxt

The IP-ID of the inner IP header.

Referenced by d_generic_create(), and d_generic_destroy().

struct list_decomp* d_generic_context::list_decomp1

The list decompressor of the outer IP header.

Referenced by d_generic_create(), and d_generic_destroy().

struct list_decomp* d_generic_context::list_decomp2