ghc_icmpv6 18 net/6lowpan/nhc_ghc_icmpv6.c LOWPAN_NHC(ghc_icmpv6, "RFC7400 ICMPv6", NEXTHDR_ICMP, 0, ghc_icmpv6 21 net/6lowpan/nhc_ghc_icmpv6.c module_lowpan_nhc(ghc_icmpv6);