The generic compression context. More...

#include <c_generic.h>

Collaboration diagram for c_generic_context:

Data Fields
uint32_t	sn
	The Sequence Number (SN), may be 16-bit or 32-bit long.
struct c_wlsb *	sn_window
	A window used to encode the SN.
int	ir_count
	The number of packets sent while in Initialization & Refresh (IR) state.
int	fo_count
	The number of packets sent while in First Order (FO) state.
int	so_count
	The number of packets sent while in Second Order (SO) state.
size_t	go_back_fo_count
	The number of packet sent while in SO state, used for the periodic refreshes of the context.
size_t	go_back_ir_count
	The number of packet sent while in FO or SO state, used for the periodic refreshes of the context.
size_t	ip_hdr_nr
struct ip_header_info	outer_ip_flags
	Information about the outer IP header.
struct ip_header_info	inner_ip_flags
	Information about the inner IP header.
struct generic_tmp_vars	tmp
	Temporary variables that are used during one single compression of packet.
unsigned int	next_header_proto
	The protocol number registered by IANA for the next header protocol.
unsigned int	next_header_len
	The length of the next header.
bool(*	encode_uncomp_fields )(struct rohc_comp_ctxt const context, const struct net_pkt const uncomp_pkt)
void(*	decide_state )(struct rohc_comp_ctxt *const context)
	The handler used to decide the state that should be used for the next packet.
rohc_packet_t(*	decide_FO_packet )(const struct rohc_comp_ctxt *context)
	The handler used to decide which packet to send in FO state.
rohc_packet_t(*	decide_SO_packet )(const struct rohc_comp_ctxt *context)
	The handler used to decide which packet to send in SO state.
rohc_ext_t(*	decide_extension )(const struct rohc_comp_ctxt *context)
void(*	init_at_IR )(const struct rohc_comp_ctxt context, const unsigned char next_header)
	The handler used to initialize some data just before the IR packet build.
uint32_t(*	get_next_sn )(const struct rohc_comp_ctxt const context, const struct net_pkt const uncomp_pkt)
size_t(*	code_static_part )(const struct rohc_comp_ctxt const context, const unsigned char const next_header, unsigned char *const dest, const size_t counter)
	The handler used to add the static part of the next header to the ROHC packet.
size_t(*	code_dynamic_part )(const struct rohc_comp_ctxt const context, const unsigned char const next_header, unsigned char *const dest, const size_t counter)
	The handler used to add the dynamic part of the next header to the ROHC pachet.
int(*	code_ir_remainder )(const struct rohc_comp_ctxt const context, unsigned char const dest, const size_t dest_max_len, const size_t counter)
	The handler used to add the IR/IR-DYN remainder header to the ROHC pachet.
size_t(*	code_UO_packet_head )(const struct rohc_comp_ctxt const context, const unsigned char const next_header, unsigned char const dest, const size_t counter, size_t const first_position)
	The handler used to add an additional header in the head of the UO-0, UO-1 and UO-2 packets.
size_t(*	code_uo_remainder )(const struct rohc_comp_ctxt const context, const unsigned char const next_header, unsigned char *const dest, const size_t counter)
	The handler used to add an additional header in the tail of the UO-0, UO-1 and UO-2 packets.
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 *	specific
	Profile-specific data.

Detailed Description

The generic compression 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

size_t(* c_generic_context::code_dynamic_part)(const struct rohc_comp_ctxt *const context, const unsigned char *const next_header, unsigned char *const dest, const size_t counter)

The handler used to add the dynamic part of the next header to the ROHC pachet.

int(* c_generic_context::code_ir_remainder)(const struct rohc_comp_ctxt *const context, unsigned char *const dest, const size_t dest_max_len, const size_t counter)

The handler used to add the IR/IR-DYN remainder header to the ROHC pachet.

size_t(* c_generic_context::code_static_part)(const struct rohc_comp_ctxt *const context, const unsigned char *const next_header, unsigned char *const dest, const size_t counter)

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

size_t(* c_generic_context::code_UO_packet_head)(const struct rohc_comp_ctxt *const context, const unsigned char *const next_header, unsigned char *const dest, const size_t counter, size_t *const first_position)

The handler used to add an additional header in the head of the UO-0, UO-1 and UO-2 packets.

size_t(* c_generic_context::code_uo_remainder)(const struct rohc_comp_ctxt *const context, const unsigned char *const next_header, unsigned char *const dest, const size_t counter)

The handler used to add an additional header in the tail of the UO-0, UO-1 and UO-2 packets.

uint8_t(* c_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(* c_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.

rohc_ext_t(* c_generic_context::decide_extension)(const struct rohc_comp_ctxt *context)

The handler used to decide which extension to send

rohc_packet_t(* c_generic_context::decide_FO_packet)(const struct rohc_comp_ctxt *context)

The handler used to decide which packet to send in FO state.

rohc_packet_t(* c_generic_context::decide_SO_packet)(const struct rohc_comp_ctxt *context)

The handler used to decide which packet to send in SO state.

void(* c_generic_context::decide_state)(struct rohc_comp_ctxt *const context)

The handler used to decide the state that should be used for the next packet.

bool(* c_generic_context::encode_uncomp_fields)(struct rohc_comp_ctxt *const context, const struct net_pkt *const uncomp_pkt)

The handler for encoding profile-specific uncompressed header fields

int c_generic_context::fo_count