riot_sys

Function gnrc_netif_ipv6_addr_best_src

Source 
pub unsafe extern "C" fn gnrc_netif_ipv6_addr_best_src(
    netif: *mut gnrc_netif_t,
    dst: *const ipv6_addr_t,
    ll_only: bool,
) -> *mut ipv6_addr_t
Expand description

@brief Searches for the best address on an interface usable as a source address for a given destination address.

@pre (netif != NULL) && (dst != NULL)

@param[in] netif the network interface @param[in] dst the destination address you want to find a source for. @param[in] ll_only only link local addresses qualify

@see RFC 6724

@note Only available with @ref net_gnrc_ipv6 “gnrc_ipv6”.

@todo Rule 4 from RFC 6724 is currently not implemented. Has to updated as soon as gnrc supports Mobile IP.

@todo Rule 6 from RFC 6724 is currently not implemented. Has to updated as soon as gnrc supports flow labels.

@todo Rule 7 from RFC 6724 is currently not implemented. Has to updated as soon as gnrc supports temporary addresses.

@return The best source address for a packet addressed to @p dst @return NULL, if no matching address can be found on the interface.