Support for IPv6 option extension headers

GNRC implementation of IPv6 hop-by-hop and destination option header extension More...

Detailed Description

GNRC implementation of IPv6 hop-by-hop and destination option header extension

Files
file	opt.h
	GNRC hop-by-hop and destination option header definitions.

Functions
gnrc_pktsnip_t *	gnrc_ipv6_ext_opt_process (gnrc_pktsnip_t *pkt, uint8_t protnum)
	Processes all options within an IPv6 option header.

Function Documentation

gnrc_ipv6_ext_opt_process()

gnrc_pktsnip_t * gnrc_ipv6_ext_opt_process	(	gnrc_pktsnip_t *	pkt,
		uint8_t	protnum )

Processes all options within an IPv6 option header.

Precondition

pkt != NULL

(protnum == PROTNUM_IPV6_EXT_HOPOPT) || (protnum == PROTNUM_IPV6_EXT_DST)

Parameters

[in]	pkt	The packet containing the option header. The option must be contained in the first snip, with all preceding headers marked (in receive order). Must not be NULL.
[in]	protnum	The protocol number of the option header. Must be PROTNUM_IPV6_EXT_HOPOPT or PROTNUM_IPV6_EXT_DST

Returns

pkt with the option header marked on success.

NULL, if the packet was consumed by the option handling.

NULL, on error. pkt is released with EINVAL in that case and if necessary and gnrc_icmpv6_error is used, the according ICMPv6 error message is sent.