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gnrc/nib: don't add routers from WPAN as default router for 6LBR

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This avoids a race condition where the default router slots for the 6LBR
are used up by router advertisements from the 6Lo network that arrived
before router advertisements from the upstream network.

The border router should ignore 'default routers' from the 6Lo network as
it consitutes the uplink for that network.
This commit is contained in:
Benjamin Valentin 2022-05-23 15:13:26 +02:00
parent 37db22edea
commit f544890056
1 changed files with 1 additions and 1 deletions
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2
sys/net/gnrc/network_layer/ipv6/nib/nib.c
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@ -675,7 +675,7 @@ static void _handle_rtr_adv(gnrc_netif_t *netif, const ipv6_hdr_t *ipv6,
}
#endif /* !CONFIG_GNRC_IPV6_NIB_6LBR */
#endif /* CONFIG_GNRC_IPV6_NIB_MULTIHOP_P6C */
if (rtr_adv->ltime.u16 != 0) {
if (!gnrc_netif_is_6lbr(netif) && rtr_adv->ltime.u16 != 0) {
uint16_t rtr_ltime = byteorder_ntohs(rtr_adv->ltime);
dr = _nib_drl_add(&ipv6->src, netif->pid);