TCP header description. More...

#include <stdint.h>
#include "config.h"

Include dependency graph for tcp.h:

This graph shows which files directly or indirectly include this file:

Data Structures
struct	tcphdr
	The TCP base header without options. More...

struct	sack_block_t
	The Selective Acknowlegment TCP option. More...

struct	tcp_option_timestamp

Macros
#define	RSF_RST_ONLY 0x04

#define	RSF_SYN_ONLY 0x02

#define	RSF_FIN_ONLY 0x01

#define	RSF_NONE 0x00

#define	ROHC_TCP_OPTS_LEN_MAX_PROTO (15U * 4U - (uint8_t) sizeof(struct tcphdr))
	The maximum length of TCP options supported by the TCP protocol. More...

#define	ROHC_TCP_OPTS_MAX_PROTO ROHC_TCP_OPTS_LEN_MAX_PROTO
	The maximum of TCP options supported by the TCP protocol. More...

#define	TCP_OLEN_MSS 4U

#define	TCP_OLEN_WS 3U

#define	TCP_OLEN_SACK_PERM 2U

#define	TCP_OLEN_TS 10U

#define	TCP_SACK_BLOCKS_MAX_NR 4U

Enumerations
enum	rohc_tcp_option_type_t { TCP_OPT_EOL = 0U, TCP_OPT_NOP = 1U, TCP_OPT_MSS = 2U, TCP_OPT_WS = 3U, TCP_OPT_SACK_PERM = 4U, TCP_OPT_SACK = 5U, TCP_OPT_TS = 8U, TCP_OPT_MAX = 255U }

Functions
static char *	tcp_opt_get_descr (const uint8_t opt_type)
	Get a string that describes the given option type. More...

Detailed Description

TCP header description.

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

Macro Definition Documentation

◆ ROHC_TCP_OPTS_LEN_MAX_PROTO

#define ROHC_TCP_OPTS_LEN_MAX_PROTO (15U * 4U - (uint8_t) sizeof(struct tcphdr))

The maximum length of TCP options supported by the TCP protocol.

The TCP data offset is coded on 32-bit words on 4 bits, so the whole TCP header may be up to 15*4=60 bytes. The base TCP header is 20-byte long.

◆ ROHC_TCP_OPTS_MAX_PROTO

#define ROHC_TCP_OPTS_MAX_PROTO ROHC_TCP_OPTS_LEN_MAX_PROTO

The maximum of TCP options supported by the TCP protocol.

One TCP header may contain up to 40 bytes of options, so it may contain up 40 1-byte options.

See also: ROHC_TCP_OPTS_MAX

◆ RSF_FIN_ONLY

#define RSF_FIN_ONLY 0x01

◆ RSF_NONE

#define RSF_NONE 0x00

◆ RSF_RST_ONLY

#define RSF_RST_ONLY 0x04

◆ RSF_SYN_ONLY

#define RSF_SYN_ONLY 0x02

◆ TCP_OLEN_MSS

#define TCP_OLEN_MSS 4U

◆ TCP_OLEN_SACK_PERM

#define TCP_OLEN_SACK_PERM 2U

◆ TCP_OLEN_TS

#define TCP_OLEN_TS 10U

◆ TCP_OLEN_WS

#define TCP_OLEN_WS 3U

◆ TCP_SACK_BLOCKS_MAX_NR

#define TCP_SACK_BLOCKS_MAX_NR 4U

The maximum number of SACK blocks in the TCP SACK option

Enumeration Type Documentation

◆ rohc_tcp_option_type_t

enum rohc_tcp_option_type_t

The different TCP options

Enumerator
TCP_OPT_EOL	The End of Option List (EOL) TCP option
TCP_OPT_NOP	The No OPeration (NOP) TCP option
TCP_OPT_MSS	The Maximum Segment Size (MSS) TCP option
TCP_OPT_WS	The Window Scale (WS) TCP option
TCP_OPT_SACK_PERM	The SACK Permitted TCP option
TCP_OPT_SACK	The Selective ACKnowledgement (SACK) TCP option
TCP_OPT_TS	The TimeStamp (TS) TCP option
TCP_OPT_MAX	The maximum TCP option

Function Documentation

◆ tcp_opt_get_descr()

static char * tcp_opt_get_descr ( const uint8_t opt_type )

inlinestatic

Get a string that describes the given option type.

Parameters

opt_type The type of the option to get a description for

Returns: The description of the option

Data Structures

Macros

Enumerations

Functions