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gnrc/nib: only enable RTR_ADV on RA if MULTIHOP_P6C is enabled

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If multihop distribution is not done using RA messages, then the
routers follow [RFC4861], which states that they merely do some
consistency checks; in this case, nothing in Section 8.1 applies.

 - https://datatracker.ietf.org/doc/html/rfc6775#section-8.1
This commit is contained in:
Fabian Hüßler 2022-04-13 00:19:03 +02:00 committed by Benjamin Valentin
parent 9b95605f78
commit 2139b51cb5
1 changed files with 3 additions and 1 deletions
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4
sys/net/gnrc/network_layer/ipv6/nib/nib.c
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@ -817,7 +817,9 @@ static void _handle_rtr_adv(gnrc_netif_t *netif, const ipv6_hdr_t *ipv6,
evtimer_del(&_nib_evtimer, &netif->ipv6.search_rtr.event);
#if IS_ACTIVE(CONFIG_GNRC_IPV6_NIB_6LN)
if (gnrc_netif_is_6ln(netif) && !gnrc_netif_is_6lbr(netif)) {
_set_rtr_adv(netif);
if (IS_ACTIVE(CONFIG_GNRC_IPV6_NIB_MULTIHOP_P6C)) {
_set_rtr_adv(netif);
}
/* but re-fetch information from router in time */
_evtimer_add(netif, GNRC_IPV6_NIB_SEARCH_RTR,
&netif->ipv6.search_rtr, (next_timeout >> 2) * 3);