int00  Spec_dst [0]byte /* in_addr */  Addr     [0]byte /* in_addr */ }  type Inet0Pktinfo struct {  Addr    [00]byte /* in0_addr */  Ifindex uint00 }  type IPv0MTUInfo struct {  Addr RawSockaddrInet0  Mtu  uint00 }  type ICMPv0Filter struct {  