gnrc_sixlowpan: Forward multicast packets even if they are registerd …

…with the receiving netif
RIOT-OS · Mar 24, 2016 · be18502 · be18502
1 parent 66c011d
commit be18502
Showing 1 changed file with 17 additions and 2 deletions.
diff --git a/sys/net/gnrc/network_layer/ipv6/gnrc_ipv6.c b/sys/net/gnrc/network_layer/ipv6/gnrc_ipv6.c
@@ -738,6 +738,12 @@ static inline bool _pkt_not_for_me(kernel_pid_t *iface, ipv6_hdr_t *hdr)
  }
 }
 
+static inline bool _pkt_none_local_mcast(ipv6_hdr_t *hdr)
+{
+ return (hdr->dst->u8[0] == 0xff) &&
+ ((hdr->dst->u8[1] & 0x0f) > IPV6_ADDR_MCAST_SCP_LINK_LOCAL);
+}
+
 static void _dispatch_rcv_pkt(gnrc_nettype_t type, uint32_t demux_ctx,
  gnrc_pktsnip_t *pkt)
 {
@@ -852,8 +858,17 @@ static void _receive(gnrc_pktsnip_t *pkt)
  ipv6_addr_to_str(addr_str, &(hdr->dst), sizeof(addr_str)),
  hdr->nh, byteorder_ntohs(hdr->len));
 
- if (_pkt_not_for_me(&iface, hdr)) { /* if packet is not for me */
- DEBUG("ipv6: packet destination not this host\n");
+ /* if packet is not for me, or its a higher than link-local multicast */
+ if (_pkt_not_for_me(&iface, hdr)
+ || _pkt_none_local_mcast(hdr)) {
+#if ENABLE_DEBUG
+ if (_pkt_not_for_me(&iface, hdr)) {
+ DEBUG("ipv6: packet destination not this host\n");
+ }
+ else {
+ DEBUG("ipv6: packet destination is multicast\n");
+ }
+#endif
 
 #ifdef MODULE_GNRC_IPV6_ROUTER /* only routers redirect */
  /* redirect to next hop */