ROHC decompression context for the uncompressed profile. More...

#include "d_uncompressed.h"
#include "rohc_bit_ops.h"
#include "rohc_traces.h"

Include dependency graph for d_uncompressed.c:

Functions
void *	uncompressed_allocate_decode_data (void)
	Allocate profile-specific data, nothing to allocate for the uncompressed profile.
void	uncompressed_free_decode_data (void *context)
	Destroy profile-specific data, nothing to destroy for the uncompressed profile.
int	uncompressed_decode_ir (struct rohc_decomp decomp, struct d_context context, const unsigned char const rohc_packet, const unsigned int rohc_length, int large_cid_len, int is_addcid_used, unsigned char dest)
	Decode one IR packet.
unsigned int	uncompressed_detect_ir_size (struct d_context context, unsigned char packet, unsigned int plen, unsigned int large_cid_len)
	Find the length of data in an IR packet.
unsigned int	uncompressed_detect_ir_dyn_size (struct d_context context, unsigned char packet, unsigned int plen, unsigned int large_cid_len)
	Find the length of data in an IR-DYN packet.
int	uncompressed_decode (struct rohc_decomp decomp, struct d_context context, const unsigned char const rohc_packet, const unsigned int rohc_length, int second_byte, unsigned char dest)
	Decode one IR-DYN, UO-0, UO-1 or UOR-2 packet, but not IR packet.
int	uncompressed_get_sn (struct d_context *context)
	Get the reference SN value of the context. Always return 0 for the uncompressed profile.
Variables
struct d_profile	d_uncomp_profile
	Define the decompression part of the Uncompressed profile as described in the RFC 3095.

Detailed Description

ROHC decompression context for the uncompressed profile.

Author:: Didier Barvaux <didier.barvaux@toulouse.viveris.com>; The hackers from ROHC for Linux

Function Documentation

void* uncompressed_allocate_decode_data ( void )

Allocate profile-specific data, nothing to allocate for the uncompressed profile.

This function is one of the functions that must exist in one profile for the framework to work.

Returns:: The newly-created generic decompression context

int uncompressed_decode	(	struct rohc_decomp *	decomp,
		struct d_context *	context,
		const unsigned char *const	rohc_packet,
		const unsigned int	rohc_length,
		int	second_byte,
		unsigned char *	dest
	)

Decode one IR-DYN, UO-0, UO-1 or UOR-2 packet, but not IR packet.

This function is one of the functions that must exist in one profile for the framework to work.

Parameters:

decomp	The ROHC decompressor
context	The decompression context
rohc_packet	The ROHC packet to decode
rohc_length	The length of the ROHC packet
second_byte	The offset for the second byte of the ROHC packet (depends on the CID encoding and the packet type)
dest	The decoded IP packet

Returns:: The length of the uncompressed IP packet or ROHC_ERROR if an error occurs

References GET_BIT_0_7, NO_CONTEXT, rohc_debugf, ROHC_ERROR, and d_context::state.

int uncompressed_decode_ir	(	struct rohc_decomp *	decomp,
		struct d_context *	context,
		const unsigned char *const	rohc_packet,
		const unsigned int	rohc_length,
		int	large_cid_len,
		int	is_addcid_used,
		unsigned char *	dest
	)

Decode one IR packet.

This function is one of the functions that must exist in one profile for the framework to work.

Parameters:

decomp	The ROHC decompressor
context	The decompression context
rohc_packet	The ROHC packet to decode
rohc_length	The length of the ROHC packet to decode
large_cid_len	The length of the large CID field
is_addcid_used	Whether the add-CID field is present or not
dest	The decoded IP packet

Returns:: The length of the uncompressed IP packet or ROHC_OK_NO_DATA if no data is returned or ROHC_ERROR if an error occurs

References FULL_CONTEXT, rohc_debugf, ROHC_ERROR, and d_context::state.

unsigned int uncompressed_detect_ir_dyn_size	(	struct d_context *	context,
		unsigned char *	packet,
		unsigned int	plen,
		unsigned int	large_cid_len
	)

Find the length of data in an IR-DYN packet.

This function is one of the functions that must exist in one profile for the framework to work.

Parameters:

context	The decompression context
packet	The IR-DYN packet after the Add-CID byte if present
plen	The length of the IR-DYN packet minus the Add-CID byte
large_cid_len	The size of the large CID field

Returns:: The length of data in the IR-DYN packet, 0 if an error occurs

References rohc_debugf.

unsigned int uncompressed_detect_ir_size	(	struct d_context *	context,
		unsigned char *	packet,
		unsigned int	plen,
		unsigned int	large_cid_len
	)

Find the length of data in an IR packet.

This function is one of the functions that must exist in one profile for the framework to work.

Parameters:

context	The decompression context
packet	The IR packet after the Add-CID byte if present
plen	The length of the IR-DYN packet minus the Add-CID byte
large_cid_len	The size of the large CID field

Returns:: The length of data in the IR packet, 0 if an error occurs

void uncompressed_free_decode_data ( void * context )

Destroy profile-specific data, nothing to destroy for the uncompressed profile.

This function is one of the functions that must exist in one profile for the framework to work.

Parameters:

context The compression context

int uncompressed_get_sn ( struct d_context * context )

Get the reference SN value of the context. Always return 0 for the uncompressed profile.

This function is one of the functions that must exist in one profile for the framework to work.

Parameters:

context The decompression context

Returns:: The reference SN value

Variable Documentation

struct d_profile d_uncomp_profile

Initial value:

{
        ROHC_PROFILE_UNCOMPRESSED,     
        "Uncompressed / Decompressor", 
        uncompressed_decode,           
        uncompressed_decode_ir,
        uncompressed_allocate_decode_data,
        uncompressed_free_decode_data,
        uncompressed_detect_ir_size,
        uncompressed_detect_ir_dyn_size,
        NULL,
        uncompressed_get_sn,
}

Define the decompression part of the Uncompressed profile as described in the RFC 3095.

Functions

Variables

Detailed Description

Function Documentation

Variable Documentation