gnrc_tcp_option.h File Reference

TCP option handling declarations. More...

Detailed Description

TCP option handling declarations.

Author

Simon Brummer simon.nosp@m..bru.nosp@m.mmer@.nosp@m.post.nosp@m.eo.de

Definition in file gnrc_tcp_option.h.

#include <stdint.h>
#include "assert.h"
#include "net/tcp.h"
#include "net/gnrc/tcp/tcb.h"

Include dependency graph for gnrc_tcp_option.h:

Go to the source code of this file.

static uint32_t	_gnrc_tcp_option_build_mss (uint16_t mss)
	Helper function to build the MSS option.
static uint16_t	_gnrc_tcp_option_build_offset_control (uint16_t nopts, uint16_t ctl)
	Helper function to build the combined option and control flag field.
int	_gnrc_tcp_option_parse (gnrc_tcp_tcb_t *tcb, tcp_hdr_t *hdr)
	Parses options of a given TCP header.

Function Documentation

_gnrc_tcp_option_build_mss()

static uint32_t _gnrc_tcp_option_build_mss ( uint16_t  mss )

inlinestatic

Helper function to build the MSS option.

Parameters

[in]

mss

MSS value that should be set.

Returns

MSS option value.

Definition at line 39 of file gnrc_tcp_option.h.

_gnrc_tcp_option_build_offset_control()

static uint16_t _gnrc_tcp_option_build_offset_control ( uint16_t  nopts, uint16_t  ctl  )

inlinestatic

Helper function to build the combined option and control flag field.

Parameters

[in]	nopts	Number of options.
[in]	ctl	Control flag field.

Returns

Bitfield with encoded control bits and number of options.

Definition at line 53 of file gnrc_tcp_option.h.

_gnrc_tcp_option_parse()

int _gnrc_tcp_option_parse	(	gnrc_tcp_tcb_t *	tcb,
		tcp_hdr_t *	hdr
	)

Parses options of a given TCP header.

Parameters

[in,out]	tcb	TCB holding the connection information.
[in]	hdr	TCP header to be parsed.

Returns

Zero on success. Negative value on error.