d_udp_lite.c File Reference

ROHC decompression context for the UDP-Lite profile. More...

#include "d_udp_lite.h"
#include "d_udp.h"
#include "d_generic.h"
#include "rohc_bit_ops.h"
#include "rohc_traces.h"
#include "rohc_debug.h"
#include "rohc_packets.h"
#include "crc.h"
#include "protocols/udp_lite.h"
#include "config.h"

Include dependency graph for d_udp_lite.c:

Data Structures
struct	d_udp_lite_context
	Define the UDP-Lite part of the decompression profile context. More...
Functions
void *	d_udp_lite_create (void)
	Create the UDP-Lite decompression context.
int	d_udp_lite_decode (struct rohc_decomp *decomp, struct d_context *context, const unsigned char *const rohc_packet, const unsigned int rohc_length, const size_t add_cid_len, const size_t large_cid_len, unsigned char *dest)
	Decode one IR, IR-DYN or UO* packet for UDP-Lite profile.
Variables
struct d_profile	d_udplite_profile
	Define the decompression part of the UDP-Lite profile as described in the RFC 4019.

---

Detailed Description

ROHC decompression context for the UDP-Lite profile.

Author:

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

Didier Barvaux <didier@barvaux.org>

The hackers from ROHC for Linux

---

Function Documentation

void* d_udp_lite_create

(

void

)

Create the UDP-Lite decompression context.

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

Returns:

The newly-created UDP-Lite decompression context

References d_generic_context::build_next_header, d_udp_lite_context::cfi, d_udp_lite_context::cfp, d_generic_context::compute_crc_dynamic, d_generic_context::compute_crc_static, d_generic_create(), d_generic_destroy(), d_generic_context::decode_values_from_bits, d_generic_context::detect_packet_type, d_generic_context::inner_ip_changes, d_generic_changes::next_header, d_generic_changes::next_header_len, d_generic_context::next_header_len, d_generic_context::next_header_proto, d_generic_context::outer_ip_changes, d_generic_context::parse_dyn_next_hdr, d_generic_context::parse_static_next_hdr, d_generic_context::parse_uo_remainder, rohc_debugf, ROHC_IPPROTO_UDPLITE, rohc_lsb_free(), rohc_lsb_new(), ROHC_LSB_SHIFT_SN, d_generic_context::sn_lsb_ctxt, d_generic_context::specific, udp_compute_crc_dynamic(), udp_compute_crc_static(), udp_parse_static_udp(), udp_update_context(), d_generic_context::update_context, and zfree.

int d_udp_lite_decode	(	struct rohc_decomp *	decomp,
		struct d_context *	context,
		const unsigned char *const	rohc_packet,
		const unsigned int	rohc_length,
		const size_t	add_cid_len,
		const size_t	large_cid_len,
		unsigned char *	dest
	)

Decode one IR, IR-DYN or UO* packet for UDP-Lite profile.

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
add_cid_len	The length of the optional Add-CID field
large_cid_len	The length of the optional large CID field
dest	The decoded IP packet

Returns:

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

References d_udp_lite_context::cce_packet, d_generic_decode(), rohc_debugf, ROHC_ERROR, d_context::specific, and d_generic_context::specific.

---

Variable Documentation

struct d_profile d_udplite_profile

Initial value:

{
        ROHC_PROFILE_UDPLITE,        
        "UDP-Lite / Decompressor",   
        d_udp_lite_decode,           
        d_udp_lite_create,
        d_udp_lite_destroy,
        d_generic_get_sn,
}

Define the decompression part of the UDP-Lite profile as described in the RFC 4019.