d_tcp_dynamic.c File Reference

Handle the dynamic chain of the TCP decompression profile. More...

#include "d_tcp_dynamic.h"
#include "d_tcp_defines.h"
#include "d_tcp_opts_list.h"
#include "rohc_utils.h"
#include "protocols/ip_numbers.h"
#include "schemes/rfc4996.h"
#include <string.h>

Include dependency graph for d_tcp_dynamic.c:

Functions
static int	tcp_parse_dynamic_ip (const struct rohc_decomp_ctxt *const context, const uint8_t *const rohc_packet, const size_t rohc_length, struct rohc_tcp_extr_ip_bits *const ip_bits)
	Decode the dynamic IP header of the rohc packet.
static int	tcp_parse_dynamic_ipv6_option (const struct rohc_decomp_ctxt *const context, ip_option_context_t *const opt_context, const uint8_t *const rohc_packet, const size_t rohc_length)
	Decode the dynamic IPv6 option header of the rohc packet.
static int	tcp_parse_dynamic_tcp (const struct rohc_decomp_ctxt *const context, const uint8_t *const rohc_packet, const size_t rohc_length, struct rohc_tcp_extr_bits *const bits)
	Decode the TCP dynamic part of the ROHC packet.
bool	tcp_parse_dyn_chain (const struct rohc_decomp_ctxt *const context, const uint8_t *const rohc_packet, const size_t rohc_length, struct rohc_tcp_extr_bits *const bits, size_t *const parsed_len)
	Parse the dynamic chain of the IR/IR-DYN packet.

---

Detailed Description

Handle the dynamic chain of the TCP decompression profile.

Author:

FWX <rohc_team@dialine.fr>

Didier Barvaux <didier@barvaux.org>

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

---

Function Documentation

bool tcp_parse_dyn_chain	(	const struct rohc_decomp_ctxt *const	context,
		const uint8_t *const	rohc_packet,
		const size_t	rohc_length,
		struct rohc_tcp_extr_bits *const	bits,
		size_t *const	parsed_len
	)

Parse the dynamic chain of the IR/IR-DYN packet.

Parameters:

	context	The decompression context
	rohc_packet	The remaining part of the ROHC packet
	rohc_length	The remaining length (in bytes) of the ROHC packet
[out]	parsed_len	The length (in bytes) of static chain in case of success
[out]	bits	The bits extracted from the dynamic chain

Returns:

true in the dynamic chain was successfully parsed, false if the ROHC packet was malformed

static int tcp_parse_dynamic_ip	(	const struct rohc_decomp_ctxt *const	context,
		const uint8_t *const	rohc_packet,
		const size_t	rohc_length,
		struct rohc_tcp_extr_ip_bits *const	ip_bits
	)			[static]

Decode the dynamic IP header of the rohc packet.

Parameters:

	context	The decompression context
	rohc_packet	The remaining part of the ROHC packet
	rohc_length	The remaining length (in bytes) of the ROHC packet
[out]	ip_bits	The bits extracted from the IP part of the dynamic chain

Returns:

The length of dynamic IP header in case of success, -1 if an error occurs

static int tcp_parse_dynamic_ipv6_option	(	const struct rohc_decomp_ctxt *const	context,
		ip_option_context_t *const	opt_context,
		const uint8_t *const	rohc_packet,
		const size_t	rohc_length
	)			[static]

Decode the dynamic IPv6 option header of the rohc packet.

Parameters:

	context	The decompression context
	opt_context	The specific IPv6 option decompression context
	rohc_packet	The remaining part of the ROHC packet
	rohc_length	The remaining length (in bytes) of the ROHC packet

Returns:

The length of dynamic IP header -1 if an error occurs

static int tcp_parse_dynamic_tcp	(	const struct rohc_decomp_ctxt *const	context,
		const uint8_t *const	rohc_packet,
		const size_t	rohc_length,
		struct rohc_tcp_extr_bits *const	bits
	)			[static]

Decode the TCP dynamic part of the ROHC packet.

Parameters:

	context	The decompression context
	rohc_packet	The remaining part of the ROHC packet
	rohc_length	The remaining length (in bytes) of the ROHC packet
[out]	bits	The bits extracted from the TCP part of the dynamic chain

Returns:

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