ROHC common definitions and routines. More...

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Data Structures
struct	medium
	ROHC medium (CID characteristics). More...
Defines
#define	ROHC_DEPRECATED(msg)
#define	ROHC_EXPORT
#define	ROHC_ETHERTYPE 0x22f1
	The Ethertype assigned to the ROHC protocol by the IEEE.
#define	ROHC_OK 1
	Return code: the action done without problem.
#define	ROHC_ERROR_NO_CONTEXT -1
	Return code: the action can not proceed because no context is defined.
#define	ROHC_ERROR_PACKET_FAILED -2
	Return code: the action failed due to an unattended or malformed packet.
#define	ROHC_FEEDBACK_ONLY -3
	Return code: the action failed because the packet only contains feedback info.
#define	ROHC_ERROR_CRC -4
	Return code: the action failed due to a CRC failure.
#define	ROHC_ERROR -5
	Return code: the action encountered a problem.
#define	ROHC_NEED_REPARSE -6
	Return code: the packet needs to be parsed again.
#define	ROHC_LARGE_CID_MAX ((1 << 14) - 1) /* 2^14 - 1 = 16383 */
#define	ROHC_SMALL_CID_MAX 15
#define	ROHC_PROFILE_UNCOMPRESSED 0x0000
	The number allocated for the ROHC Uncompressed profile (RFC 3095, 5.10)
#define	ROHC_PROFILE_RTP 0x0001
	The number allocated for the ROHC RTP profile (RFC 3095, 8)
#define	ROHC_PROFILE_UDP 0x0002
	The number allocated for the ROHC UDP profile (RFC 3095, 5.11)
#define	ROHC_PROFILE_ESP 0x0003
	The number allocated for the ROHC ESP profile (RFC 3095, 5.12)
#define	ROHC_PROFILE_IP 0x0004
	The number allocated for the ROHC IP-only profile (see 5 in the RFC 3843)
#define	ROHC_PROFILE_UDPLITE 0x0008
	The number allocated for the ROHC UDP-Lite profile (see 7 in the RFC 4019)
#define	CHANGE_TO_IR_COUNT 1700
	The maximal number of packets sent in > IR states (= FO and SO states) before changing back the state to IR (periodic refreshes)
#define	CHANGE_TO_FO_COUNT 700
	The maximal number of packets sent in > FO states (= SO state) before changing back the state to FO (periodic refreshes)
#define	MAX_IR_COUNT 3
	Defines the minimal number of packets that must be sent while in IR state before being able to switch to the FO state.
#define	MAX_FO_COUNT 3
	Defines the minimal number of packets that must be sent while in FO state before being able to switch to the SO state.
#define	ROHC_INIT_TS_STRIDE_MIN 3U
	Defines the minimal number of packets that must be sent while in INIT_STRIDE state before being able to switch to the SEND_SCALED state.
#define	CRC_TYPE_2 1
#define	CRC_TYPE_3 2
#define	CRC_TYPE_6 3
#define	CRC_TYPE_7 4
#define	CRC_TYPE_8 5
Enumerations
enum	rohc_mode { U_MODE = 1, O_MODE = 2, R_MODE = 3 }
	ROHC operation modes (see 4.4 in the RFC 3095) More...
enum	rohc_cid_type_t { ROHC_LARGE_CID, ROHC_SMALL_CID }
	The different types of Context IDs (CID) a stream/context may use. More...
Functions
unsigned char ROHC_EXPORT crc_table_2[256]	ROHC_DEPRECATED ("please do not use this variable anymore, simply drop it")
char *ROHC_EXPORT	rohc_version (void)
	Get the version of the ROHC library.
const char *ROHC_EXPORT	rohc_get_mode_descr (const rohc_mode mode)
	Give a description for the given ROHC mode.
int ROHC_EXPORT	crc_get_polynom (int type) ROHC_DEPRECATED("please do not use this function anymore
void ROHC_EXPORT	crc_init_table (unsigned char *table, unsigned char polynum) ROHC_DEPRECATED("please do not use this function anymore
Variables
int ROHC_EXPORT simply drop	it

Detailed Description

ROHC common definitions and routines.

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

Define Documentation

#define CHANGE_TO_FO_COUNT 700

The maximal number of packets sent in > FO states (= SO state) before changing back the state to FO (periodic refreshes)

Referenced by rohc_alloc_compressor().

#define CHANGE_TO_IR_COUNT 1700

The maximal number of packets sent in > IR states (= FO and SO states) before changing back the state to IR (periodic refreshes)

Referenced by rohc_alloc_compressor().

#define CRC_TYPE_2 1

The CRC-2 type (deprecated)

#define CRC_TYPE_3 2

The CRC-3 type (deprecated)

#define CRC_TYPE_6 3

The CRC-6 type (deprecated)

#define CRC_TYPE_7 4

The CRC-7 type (deprecated)

#define CRC_TYPE_8 5

The CRC-8 type (deprecated)

#define MAX_FO_COUNT 3

Defines the minimal number of packets that must be sent while in FO state before being able to switch to the SO state.

Referenced by c_init_header_info(), changed_dynamic_one_hdr(), changed_static_one_hdr(), code_EXT3_packet(), decide_state(), header_fields(), and header_flags().

#define MAX_IR_COUNT 3

Defines the minimal number of packets that must be sent while in IR state before being able to switch to the FO state.

Referenced by c_udp_lite_create(), decide_state(), rtp_changed_rtp_dynamic(), rtp_decide_state(), rtp_header_flags_and_fields(), udp_changed_udp_dynamic(), and udp_lite_send_cce_packet().

#define ROHC_DEPRECATED ( msg )

Macro that handles deprecated declarations gracefully

#define ROHC_ERROR -5

Return code: the action encountered a problem.

Referenced by d_generic_decode(), d_udp_lite_decode(), f_add_option(), f_feedback2(), rohc_comp_get_last_packet_info(), rohc_decompress(), and rohc_decompress_both().

#define ROHC_ERROR_CRC -4

Return code: the action failed due to a CRC failure.

Referenced by d_optimistic_feedback(), and rohc_decompress().

#define ROHC_ERROR_NO_CONTEXT -1

Return code: the action can not proceed because no context is defined.

Referenced by d_decode_header(), d_optimistic_feedback(), and rohc_decompress().

#define ROHC_ERROR_PACKET_FAILED -2

Return code: the action failed due to an unattended or malformed packet.

Referenced by d_optimistic_feedback(), and rohc_decompress().

#define ROHC_ETHERTYPE 0x22f1

The Ethertype assigned to the ROHC protocol by the IEEE.

See also:: http://standards.ieee.org/regauth/ethertype/eth.txt

#define ROHC_EXPORT

Macro that handles DLL export declarations gracefully

#define ROHC_FEEDBACK_ONLY -3

Return code: the action failed because the packet only contains feedback info.

Referenced by d_decode_header(), and rohc_decompress().

#define ROHC_INIT_TS_STRIDE_MIN 3U

Defines the minimal number of packets that must be sent while in INIT_STRIDE state before being able to switch to the SEND_SCALED state.

Referenced by rtp_code_dynamic_rtp_part(), and rtp_header_flags_and_fields().

#define ROHC_LARGE_CID_MAX ((1 << 14) - 1) /* 2^14 - 1 = 16383 */

The maximum value for large CIDs

Referenced by d_optimistic_feedback(), f_append_cid(), rohc_c_set_max_cid(), and rohc_decomp_set_max_cid().

#define ROHC_NEED_REPARSE -6

Return code: the packet needs to be parsed again.

#define ROHC_OK 1

Return code: the action done without problem.

Referenced by c_generic_encode(), d_decode_header(), d_optimistic_feedback(), f_add_option(), f_feedback2(), f_wrap_feedback(), rohc_comp_get_last_packet_info(), and rohc_decompress().

#define ROHC_PROFILE_ESP 0x0003

The number allocated for the ROHC ESP profile (RFC 3095, 5.12)

#define ROHC_PROFILE_IP 0x0004

The number allocated for the ROHC IP-only profile (see 5 in the RFC 3843)

#define ROHC_PROFILE_RTP 0x0001

The number allocated for the ROHC RTP profile (RFC 3095, 8)

Referenced by code_EXT3_packet(), code_UO1_packet(), and code_UO2_packet().

#define ROHC_PROFILE_UDP 0x0002

The number allocated for the ROHC UDP profile (RFC 3095, 5.11)

#define ROHC_PROFILE_UDPLITE 0x0008

The number allocated for the ROHC UDP-Lite profile (see 7 in the RFC 4019)

#define ROHC_PROFILE_UNCOMPRESSED 0x0000

The number allocated for the ROHC Uncompressed profile (RFC 3095, 5.10)

Referenced by rohc_compress().

#define ROHC_SMALL_CID_MAX 15

The maximum value for small CIDs

Referenced by d_optimistic_feedback(), f_append_cid(), rohc_alloc_decompressor(), rohc_c_set_large_cid(), rohc_c_set_max_cid(), and rohc_decomp_set_max_cid().

Enumeration Type Documentation

enum rohc_cid_type_t

The different types of Context IDs (CID) a stream/context may use.

Possible values are: ROHC_LARGE_CID, ROHC_SMALL_CID.

Small CID means CID in the $[0-ROHC\_SMALL\_CID\_MAX]$ interval.

Large CID means CID in the $[0-ROHC\_LARGE\_CID\_MAX]$ interval.

See also:: ROHC_SMALL_CID_MAX ROHC_LARGE_CID_MAX

Enumerator:

ROHC_LARGE_CID

The context uses large CID.

Value in the $[0-ROHC\_LARGE\_CID\_MAX]$ interval.

ROHC_SMALL_CID

The context uses small CID.

Value in the $[0-ROHC\_SMALL\_CID\_MAX]$ interval.

enum rohc_mode

ROHC operation modes (see 4.4 in the RFC 3095)

If you add a new operation mode, please also add the corresponding textual description in rohc_get_mode_descr.

Enumerator:

U_MODE	The Unidirectional mode (U-mode)
O_MODE	The Bidirectional Optimistic mode (O-mode)
R_MODE	The Bidirectional Reliable mode (R-mode)

Function Documentation

int ROHC_EXPORT crc_get_polynom ( int type )

void ROHC_EXPORT crc_init_table	(	unsigned char *	table,
		unsigned char	polynum
	)

unsigned char ROHC_EXPORT crc_table_2 [256] ROHC_DEPRECATED	(	"please do not use this variable	anymore,
		simply drop it"
	)

The table to enable fast CRC-2 computation

Deprecated:: please do not use this variable anymore

The table to enable fast CRC-3 computation

Deprecated:: please do not use this variable anymore

The table to enable fast CRC-6 computation

Deprecated:: please do not use this variable anymore

The table to enable fast CRC-7 computation

Deprecated:: please do not use this variable anymore

The table to enable fast CRC-8 computation

Deprecated:: please do not use this variable anymore

Variable Documentation

void ROHC_EXPORT simply drop it

Data Structures

Defines

Enumerations

Functions

Variables

Detailed Description

Define Documentation

Enumeration Type Documentation

Function Documentation

Variable Documentation