c_tcp_irregular.c File Reference

Handle the irregular chain of the TCP compression profile. More...

#include "c_tcp_irregular.h"
#include "c_tcp_defines.h"
#include "protocols/ip_numbers.h"
#include "protocols/ip.h"
#include <assert.h>

Include dependency graph for c_tcp_irregular.c:

Functions
int	tcp_code_irreg_chain (struct rohc_comp_ctxt *const context, const struct ip_packet *const ip, const uint8_t ip_inner_ecn, const struct tcphdr *const tcp, uint8_t *const rohc_pkt, const size_t rohc_pkt_max_len)
	Code the irregular chain of one CO packet. More...
static int	tcp_code_irregular_ipv4_part (const struct rohc_comp_ctxt *const context, const ip_context_t *const ip_context, const struct ipv4_hdr *const ipv4, const bool is_innermost, const bool ecn_used, const uint8_t ip_inner_ecn, const bool ttl_irreg_chain_flag, uint8_t *const rohc_data, const size_t rohc_max_len)
	Build the irregular part of the IPv4 header. More...
static int	tcp_code_irregular_ipv6_part (const struct rohc_comp_ctxt *const context, const ip_context_t *const ip_context, const struct ipv6_hdr *const ipv6, const bool is_innermost, const bool ecn_used, const uint8_t ip_inner_ecn, const bool ttl_irreg_chain_flag, uint8_t *const rohc_data, const size_t rohc_max_len)
	Build the irregular part of the IPv6 header. More...
static int	tcp_code_irregular_ipv6_opt_part (struct rohc_comp_ctxt *const context, ip_option_context_t *const opt_ctxt, const struct ipv6_opt *const ipv6_opt, const uint8_t protocol, uint8_t *const rohc_data, const size_t rohc_max_len)
	Build the irregular part of the IPv6 option header. More...
static int	tcp_code_irregular_tcp_part (const struct rohc_comp_ctxt *const context, const struct tcphdr *const tcp, const uint8_t ip_inner_ecn, uint8_t *const rohc_data, const size_t rohc_max_len)
	Build the irregular part of the TCP header. More...

Detailed Description

Handle the irregular chain of the TCP compression profile.

Author

FWX rohc_.nosp@m.team.nosp@m.@dial.nosp@m.ine..nosp@m.fr

Didier Barvaux didie.nosp@m.r@ba.nosp@m.rvaux.nosp@m..org

Didier Barvaux didie.nosp@m.r.ba.nosp@m.rvaux.nosp@m.@tou.nosp@m.louse.nosp@m..viv.nosp@m.eris..nosp@m.com

Function Documentation

tcp_code_irreg_chain()

int tcp_code_irreg_chain	(	struct rohc_comp_ctxt *const	context,
		const struct ip_packet *const	ip,
		const uint8_t	ip_inner_ecn,
		const struct tcphdr *const	tcp,
		uint8_t *const	rohc_pkt,
		const size_t	rohc_pkt_max_len
	)

Code the irregular chain of one CO packet.

Parameters

context	The compression context
ip	The outer IP header
ip_inner_ecn	The ECN flags of the innermost IP header
tcp	The uncompressed TCP header
rohc_pkt	OUT: The ROHC packet
rohc_pkt_max_len	The maximum length of the ROHC packet

Returns

The length of the ROHC packet if successful, -1 otherwise

tcp_code_irregular_ipv4_part()

static int tcp_code_irregular_ipv4_part ( const struct rohc_comp_ctxt *const  context, const ip_context_t *const  ip_context, const struct ipv4_hdr *const  ipv4, const bool  is_innermost, const bool  ecn_used, const uint8_t  ip_inner_ecn, const bool  ttl_irreg_chain_flag, uint8_t *const  rohc_data, const size_t  rohc_max_len  )

static

Build the irregular part of the IPv4 header.

See RFC 4996 page 63

Parameters

	context	The compression context
	ip_context	The specific IP compression context
	ipv4	The IPv4 header
	is_innermost	True if IP header is the innermost of the packet
	ecn_used	The indicator of ECN usage
	ip_inner_ecn	The ECN flags of the IP innermost header
	ttl_irreg_chain_flag	Whether the TTL of an outer header changed
[out]	rohc_data	The ROHC packet being built
	rohc_max_len	The max remaining length in the ROHC buffer

Returns

The length appended in the ROHC buffer if positive, -1 in case of error

tcp_code_irregular_ipv6_opt_part()

static int tcp_code_irregular_ipv6_opt_part ( struct rohc_comp_ctxt *const  context, ip_option_context_t *const  opt_ctxt, const struct ipv6_opt *const  ipv6_opt, const uint8_t  protocol, uint8_t *const  rohc_data, const size_t  rohc_max_len  )

static

Build the irregular part of the IPv6 option header.

Parameters

	context	The compression context
	opt_ctxt	The compression context of the IPv6 option
	ipv6_opt	The IPv6 extension header
	protocol	The protocol of the IPv6 extension header
[out]	rohc_data	The ROHC packet being built
	rohc_max_len	The max remaining length in the ROHC buffer

Returns

The length appended in the ROHC buffer if positive, -1 in case of error

tcp_code_irregular_ipv6_part()

static int tcp_code_irregular_ipv6_part ( const struct rohc_comp_ctxt *const  context, const ip_context_t *const  ip_context, const struct ipv6_hdr *const  ipv6, const bool  is_innermost, const bool  ecn_used, const uint8_t  ip_inner_ecn, const bool  ttl_irreg_chain_flag, uint8_t *const  rohc_data, const size_t  rohc_max_len  )

static

Build the irregular part of the IPv6 header.

See RFC 4996 page 63

Parameters

	context	The compression context
	ip_context	The specific IP compression context
	ipv6	The IPv6 header
	is_innermost	True if IP header is the innermost of the packet
	ecn_used	The indicator of ECN usage
	ip_inner_ecn	The ECN flags of the IP innermost header
	ttl_irreg_chain_flag	Whether the TTL of an outer header changed
[out]	rohc_data	The ROHC packet being built
	rohc_max_len	The max remaining length in the ROHC buffer

Returns

The length appended in the ROHC buffer if positive, -1 in case of error

tcp_code_irregular_tcp_part()

static int tcp_code_irregular_tcp_part ( const struct rohc_comp_ctxt *const  context, const struct tcphdr *const  tcp, const uint8_t  ip_inner_ecn, uint8_t *const  rohc_data, const size_t  rohc_max_len  )

static

Build the irregular part of the TCP header.

Parameters

	context	The compression context
	tcp	The TCP header
	ip_inner_ecn	The ECN flags of the innermost IP header
[out]	rohc_data	The ROHC packet being built
	rohc_max_len	The max remaining length in the ROHC buffer

Returns

The length appended in the ROHC buffer if positive, -1 in case of error