void ng_ipv6_demux(kernel_pid_t iface, ng_pktsnip_t *pkt, uint8_t nh)
{
int receiver_num;
pkt->type = ng_nettype_from_protnum(nh);
switch (nh) {
case NG_PROTNUM_ICMPV6:
ng_icmpv6_demux(iface, pkt);
break;
/* TODO: add extension header handling */
default:
break;
}
receiver_num = ng_netreg_num(pkt->type, NG_NETREG_DEMUX_CTX_ALL) +
ng_netreg_num(NG_NETTYPE_IPV6, nh);
if (receiver_num == 0) {
DEBUG("ipv6: unable to forward packet as no one is interested in it\n");
ng_pktbuf_release(pkt);
return;
}
ng_pktbuf_hold(pkt, receiver_num - 1);
/* IPv6 is not interested anymore so `- 1` */
_dispatch_rcv_pkt(pkt->type, NG_NETREG_DEMUX_CTX_ALL, pkt);
_dispatch_rcv_pkt(NG_NETTYPE_IPV6, nh, pkt);
}
void ng_ipv6_demux(kernel_pid_t iface, ng_pktsnip_t *pkt, uint8_t nh)
{
int receiver_num;
pkt->type = ng_nettype_from_protnum(nh);
switch (nh) {
case NG_PROTNUM_ICMPV6:
DEBUG("ipv6: handle ICMPv6 packet (nh = %" PRIu8 ")\n", nh);
ng_icmpv6_demux(iface, pkt);
break;
#ifdef MODULE_NG_IPV6_EXT
case NG_PROTNUM_IPV6_EXT_HOPOPT:
case NG_PROTNUM_IPV6_EXT_DST:
case NG_PROTNUM_IPV6_EXT_RH:
case NG_PROTNUM_IPV6_EXT_FRAG:
case NG_PROTNUM_IPV6_EXT_AH:
case NG_PROTNUM_IPV6_EXT_ESP:
case NG_PROTNUM_IPV6_EXT_MOB:
DEBUG("ipv6: handle extension header (nh = %" PRIu8 ")\n", nh);
if (!ng_ipv6_ext_demux(iface, pkt, nh)) {
DEBUG("ipv6: unable to parse extension headers.\n");
ng_pktbuf_release(pkt);
return;
}
#endif
case NG_PROTNUM_IPV6:
DEBUG("ipv6: handle encapsulated IPv6 packet (nh = %" PRIu8 ")\n", nh);
_decapsulate(pkt);
break;
default:
break;
}
DEBUG("ipv6: forward nh = %" PRIu8 " to other threads\n", nh);
receiver_num = ng_netreg_num(pkt->type, NG_NETREG_DEMUX_CTX_ALL) +
ng_netreg_num(NG_NETTYPE_IPV6, nh);
if (receiver_num == 0) {
DEBUG("ipv6: unable to forward packet as no one is interested in it\n");
ng_pktbuf_release(pkt);
return;
}
ng_pktbuf_hold(pkt, receiver_num - 1);
/* IPv6 is not interested anymore so `- 1` */
_dispatch_rcv_pkt(pkt->type, NG_NETREG_DEMUX_CTX_ALL, pkt);
_dispatch_rcv_pkt(NG_NETTYPE_IPV6, nh, pkt);
}
