decode.c File Reference

ROHC packet related routines. More...

#include "decode.h"
#include "rohc_bit_ops.h"

Include dependency graph for decode.c:

Functions
int	d_is_segment (const unsigned char *data)
	Find out whether the field is a segment field or not.
int	d_is_padding (const unsigned char *data)
	Find out whether the field is a padding field or not.
int	d_is_feedback (const unsigned char *data)
	Find out whether a ROHC packet is a Feedback packet or not.
int	d_feedback_size (const unsigned char *data)
	Find out the size of the feedback.
int	d_feedback_headersize (const unsigned char *data)
	Find out the size of the feedback header.
int	d_is_ir (const unsigned char *data, const size_t len)
	Find out whether a ROHC packet is an IR packet or not.
int	d_is_irdyn (const unsigned char *data, const size_t len)
	Find out whether a ROHC packet is an IR-DYN packet or not.
int	d_is_add_cid (const unsigned char *data)
	Check whether a ROHC packet starts with an add-CID byte or not.
int	d_decode_add_cid (const unsigned char *data)
	Decode the add-CID byte of a ROHC packet (if the add-CID byte is present)

---

Detailed Description

ROHC packet related routines.

Author:

Didier Barvaux <didier.barvaux@toulouse.viveris.com>

Didier Barvaux <didier@barvaux.org>

The hackers from ROHC for Linux

---

Function Documentation

int d_decode_add_cid

(

const unsigned char *

data

)

Decode the add-CID byte of a ROHC packet (if the add-CID byte is present)

Parameters:

data	The ROHC packet with a possible add-CID byte

Returns:

0 if no add-CID byte is present, the CID value otherwise

References d_is_add_cid(), and GET_BIT_0_3.

Referenced by c_deliver_feedback().

int d_feedback_headersize

(

const unsigned char *

data

)

Find out the size of the feedback header.

See 5.2.2 in the RFC 3095 for details.

Parameters:

data	The feedback header

Returns:

The size of the feedback header (1 or 2 bytes)

References GET_BIT_0_2.

int d_feedback_size

(

const unsigned char *

data

)

Find out the size of the feedback.

See 5.2.2 in the RFC 3095 for details.

Parameters:

data	The feedback header

Returns:

The size of the feedback

References GET_BIT_0_2, and GET_BIT_0_7.

int d_is_add_cid

(

const unsigned char *

data

)

Check whether a ROHC packet starts with an add-CID byte or not.

Parameters:

data	The ROHC packet with a possible add-CID byte

Returns:

Whether the ROHC packet starts with an add-CID byte or not

References D_ADD_CID, and GET_BIT_4_7.

Referenced by c_deliver_feedback(), and d_decode_add_cid().

int d_is_feedback

(

const unsigned char *

data

)

Find out whether a ROHC packet is a Feedback packet or not.

Parameters:

data	The ROHC packet to analyze

Returns:

Whether the ROHC packet is a Feedback packet or not

References D_FEEDBACK, and GET_BIT_3_7.

int d_is_ir	(	const unsigned char *	data,
		const size_t	len
	)

Find out whether a ROHC packet is an IR packet or not.

Parameters:

data	The ROHC packet to analyze
len	The length of the ROHC packet

Returns:

Whether the ROHC packet is an IR packet or not

References D_IR_PACKET, and GET_BIT_1_7.

Referenced by d_decode_header().

int d_is_irdyn	(	const unsigned char *	data,
		const size_t	len
	)

Find out whether a ROHC packet is an IR-DYN packet or not.

Parameters:

data	The ROHC packet to analyze
len	The length of the ROHC packet

Returns:

Whether the ROHC packet is an IR-DYN packet or not

References D_IR_DYN_PACKET, and GET_BIT_0_7.

Referenced by d_decode_header().

int d_is_padding

(

const unsigned char *

data

)

Find out whether the field is a padding field or not.

Parameters:

data	The field to analyze

Returns:

Whether the field is a padding field or not

References D_PADDING, and GET_BIT_0_7.

int d_is_segment

(

const unsigned char *

data

)

Find out whether the field is a segment field or not.

Parameters:

data	The field to analyze

Returns:

Whether the field is a segment field or not

References D_SEGMENT, and GET_BIT_1_7.