// Copyright 2011 The Go Authors. All rights reserved. // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. // Routing sockets and messages for Darwin package syscall import ( "unsafe" ) func (any *anyMessage) toRoutingMessage(buf []byte) RoutingMessage { switch any.Type { case RTM_ADD, RTM_DELETE, RTM_CHANGE, RTM_GET, RTM_LOSING, RTM_REDIRECT, RTM_MISS, RTM_LOCK, RTM_RESOLVE: p := (*RouteMessage)(unsafe.Pointer(any)) rtm := &RouteMessage{} rtm.Header = p.Header rtm.Data = buf[SizeofRtMsghdr:any.Msglen] return rtm case RTM_IFINFO: p := (*InterfaceMessage)(unsafe.Pointer(any)) ifm := &InterfaceMessage{} ifm.Header = p.Header ifm.Data = buf[SizeofIfMsghdr:any.Msglen] return ifm case RTM_NEWADDR, RTM_DELADDR: p := (*InterfaceAddrMessage)(unsafe.Pointer(any)) ifam := &InterfaceAddrMessage{} ifam.Header = p.Header ifam.Data = buf[SizeofIfaMsghdr:any.Msglen] return ifam case RTM_NEWMADDR2, RTM_DELMADDR: p := (*InterfaceMulticastAddrMessage)(unsafe.Pointer(any)) ifmam := &InterfaceMulticastAddrMessage{} ifmam.Header = p.Header ifmam.Data = buf[SizeofIfmaMsghdr2:any.Msglen] return ifmam } return nil } // InterfaceMulticastAddrMessage represents a routing message // containing network interface address entries. type InterfaceMulticastAddrMessage struct { Header IfmaMsghdr2 Data []byte } const rtaIfmaMask = RTA_GATEWAY | RTA_IFP | RTA_IFA func (m *InterfaceMulticastAddrMessage) sockaddr() (sas []Sockaddr) { if m.Header.Addrs&rtaIfmaMask == 0 { return nil } buf := m.Data[:] for i := uint(0); i < RTAX_MAX; i++ { if m.Header.Addrs&rtaIfmaMask&(1<