IPv6 fragmentation extension

Definitions for IPv6 fragmentation extension. More...

Detailed Description

Definitions for IPv6 fragmentation extension.

See also

RFC 8200, section 4.5

Files
file	frag.h
	Fragmentation extension definitions.

Data Structures
struct	ipv6_ext_frag_t
	Fragment header definition. More...

Macros
#define	IPV6_EXT_FRAG_OFFSET_MASK   (0xFFF8)
	Mask for the offset.
#define	IPV6_EXT_FRAG_M   (0x0001)
	M flag.

Functions
static unsigned	ipv6_ext_frag_get_offset (const ipv6_ext_frag_t *frag)
	Get offset of fragment in bytes.
static bool	ipv6_ext_frag_more (const ipv6_ext_frag_t *frag)
	Checks if more fragments are coming after the given fragment.
static void	ipv6_ext_frag_set_offset (ipv6_ext_frag_t *frag, unsigned offset)
	Sets the offset field of a fragment header.
static void	ipv6_ext_frag_set_more (ipv6_ext_frag_t *frag)
	Sets the M flag of a fragment header.

Macro Definition Documentation

IPV6_EXT_FRAG_M

#define IPV6_EXT_FRAG_M   (0x0001)

M flag.

Definition at line 34 of file frag.h.

IPV6_EXT_FRAG_OFFSET_MASK

#define IPV6_EXT_FRAG_OFFSET_MASK   (0xFFF8)

Mask for the offset.

Definition at line 33 of file frag.h.

Function Documentation

ipv6_ext_frag_get_offset()

static unsigned ipv6_ext_frag_get_offset ( const ipv6_ext_frag_t * frag )

inlinestatic

Get offset of fragment in bytes.

Parameters

[in]

frag

A fragment header

Returns

Offset of fragment in bytes.

Definition at line 62 of file frag.h.

ipv6_ext_frag_more()

static bool ipv6_ext_frag_more ( const ipv6_ext_frag_t * frag )

inlinestatic

Checks if more fragments are coming after the given fragment.

Parameters

[in]

frag

A fragment header

Returns

true, when more fragments are coming after the given fragment.

false, when the given fragment is the last.

Definition at line 78 of file frag.h.

ipv6_ext_frag_set_more()

static void ipv6_ext_frag_set_more ( ipv6_ext_frag_t * frag )

inlinestatic

Sets the M flag of a fragment header.

Note

Must be called after ipv6_ext_frag_set_offset()

Parameters

[in,out]

frag

A fragment header

Definition at line 109 of file frag.h.

ipv6_ext_frag_set_offset()

static void ipv6_ext_frag_set_offset ( ipv6_ext_frag_t * frag, unsigned offset )

inlinestatic

Sets the offset field of a fragment header.

Note

Must be called before ipv6_ext_frag_set_more()

Parameters

[in,out]	frag	A fragment header
[in]	offset	The offset of the fragment in bytes. Is assumed to be a multiple of 8. Is assumed to be lesser or equal to 65528.

Definition at line 93 of file frag.h.