d_ip.c File Reference

ROHC decompression context for the IP-only profile. More...

#include "d_ip.h"
#include "rohc_traces.h"
#include "rohc_bit_ops.h"
#include "rohc_packets.h"
#include "rohc_debug.h"
#include "decode.h"
#include "config.h"

Include dependency graph for d_ip.c:

Functions
void *	d_ip_create (void)
	Create the IP decompression context.
rohc_packet_t	ip_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)
	Detect the type of ROHC packet for IP-based non-RTP profiles.
int	ip_parse_dynamic_ip (struct d_generic_context *context, const unsigned char *packet, unsigned int length, struct rohc_extr_bits *const bits)
	Parse the IP dynamic part of the ROHC packet.
Variables
struct d_profile	d_ip_profile
	Define the decompression part of the IP-only profile as described in the RFC 3843.

---

Detailed Description

ROHC decompression context for the IP-only profile.

Author:

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

The hackers from ROHC for Linux

---

Function Documentation

void* d_ip_create

(

void

)

Create the IP decompression context.

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

Returns:

A fake IP decompression context

References d_generic_create(), d_generic_context::detect_packet_type, ip_detect_packet_type(), ip_parse_dynamic_ip(), d_generic_context::parse_dyn_next_hdr, rohc_debugf, rohc_lsb_new(), ROHC_LSB_SHIFT_SN, d_generic_context::sn_lsb_ctxt, and zfree.

rohc_packet_t ip_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
	)

Detect the type of ROHC packet for IP-based non-RTP profiles.

Parameters:

decomp	The ROHC decompressor
context	The decompression context
packet	The ROHC packet
rohc_length	The length of the ROHC packet
large_cid_len	The length of the optional large CID field

Returns:

The packet type

References d_is_ir(), d_is_irdyn(), d_is_uo0(), d_is_uo1(), d_is_uor2(), PACKET_IR, PACKET_IR_DYN, PACKET_UNKNOWN, PACKET_UO_0, PACKET_UO_1, PACKET_UOR_2, and rohc_debugf.

Referenced by d_ip_create(), and d_udp_create().

int ip_parse_dynamic_ip	(	struct d_generic_context *	context,
		const unsigned char *	packet,
		unsigned int	length,
		struct rohc_extr_bits *const	bits
	)

Parse the IP dynamic part of the ROHC packet.

Parameters:

context	The generic decompression context
packet	The ROHC packet to parse
length	The length of the ROHC packet
bits	OUT: The bits extracted from the ROHC header

Returns:

The number of bytes read in the ROHC packet, -1 in case of failure

References GET_NEXT_16_BITS, PACKET_IR, PACKET_IR_DYN, d_generic_context::packet_type, rohc_debugf, rohc_extr_bits::sn, and rohc_extr_bits::sn_nr.

Referenced by d_ip_create().

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Variable Documentation

struct d_profile d_ip_profile

Initial value:

{
        ROHC_PROFILE_IP,              
        "IP / Decompressor",          
        d_generic_decode,             
        d_ip_create,
        d_ip_destroy,
        d_generic_get_sn,
}

Define the decompression part of the IP-only profile as described in the RFC 3843.