6LoWPAN Fragmentation headers and functionality More...

Detailed Description

6LoWPAN Fragmentation headers and functionality

Topics
	6LoWPAN fragmentation buffer
	Buffer for asynchronous 6LoWPAN fragmentation

	6LoWPAN reassembly buffer
	6LoWPAN reassembly buffer

	Fragment size hint
	Provides a hint for smaller fragment sizes than the link-layer PDU for the next fragment to sent

	Fragmentation and reassembly statistics
	Counter for certain 6LoWPAN fragmentation and reassembly events.

	Minimal fragment forwarding
	Provides minimal fragment forwarding using the VRB

	Virtual reassembly buffer
	Virtual reassembly buffer

Files
file	frag.h
	6LoWPAN Fragmentation definitions

Functions
void	gnrc_sixlowpan_frag_send (gnrc_pktsnip_t pkt, void ctx, unsigned page)
	Sends a packet fragmented.

void	gnrc_sixlowpan_frag_recv (gnrc_pktsnip_t pkt, void ctx, unsigned page)
	Handles a packet containing a fragment header.

Function Documentation

void gnrc_sixlowpan_frag_recv	(	gnrc_pktsnip_t *	pkt,
		void *	ctx,
		unsigned	page )

Handles a packet containing a fragment header.

Parameters

[in]	pkt	The packet to handle
[in]	ctx	Context for the packet. May be NULL.
[in]	page	Current 6Lo dispatch parsing page.

void gnrc_sixlowpan_frag_send	(	gnrc_pktsnip_t *	pkt,
		void *	ctx,
		unsigned	page )

Sends a packet fragmented.

Precondition: ctx != NULL; gnrc_sixlowpan_frag_fb_t::pkt of ctx is equal to pkt or pkt == NULL.

Parameters

[in]	pkt	A packet. May be NULL.
[in]	ctx	A fragmentation buffer entry. Expected to be of type gnrc_sixlowpan_frag_fb_t, with gnrc_sixlowpan_frag_fb_t set to `pkt`. Must not be NULL.
[in]	page	Current 6Lo dispatch parsing page.