route_darwin.mx raw

   1  // Copyright 2011 The Go Authors. All rights reserved.
   2  // Use of this source code is governed by a BSD-style
   3  // license that can be found in the LICENSE file.
   4  
   5  package syscall
   6  
   7  import "unsafe"
   8  
   9  func (any *anyMessage) toRoutingMessage(b []byte) RoutingMessage {
  10  	switch any.Type {
  11  	case RTM_ADD, RTM_DELETE, RTM_CHANGE, RTM_GET, RTM_LOSING, RTM_REDIRECT, RTM_MISS, RTM_LOCK, RTM_RESOLVE:
  12  		p := (*RouteMessage)(unsafe.Pointer(any))
  13  		return &RouteMessage{Header: p.Header, Data: b[SizeofRtMsghdr:any.Msglen]}
  14  	case RTM_IFINFO:
  15  		p := (*InterfaceMessage)(unsafe.Pointer(any))
  16  		return &InterfaceMessage{Header: p.Header, Data: b[SizeofIfMsghdr:any.Msglen]}
  17  	case RTM_NEWADDR, RTM_DELADDR:
  18  		p := (*InterfaceAddrMessage)(unsafe.Pointer(any))
  19  		return &InterfaceAddrMessage{Header: p.Header, Data: b[SizeofIfaMsghdr:any.Msglen]}
  20  	case RTM_NEWMADDR2, RTM_DELMADDR:
  21  		p := (*InterfaceMulticastAddrMessage)(unsafe.Pointer(any))
  22  		return &InterfaceMulticastAddrMessage{Header: p.Header, Data: b[SizeofIfmaMsghdr2:any.Msglen]}
  23  	}
  24  	return nil
  25  }
  26  
  27  // InterfaceMulticastAddrMessage represents a routing message
  28  // containing network interface address entries.
  29  //
  30  // Deprecated: Use golang.org/x/net/route instead.
  31  type InterfaceMulticastAddrMessage struct {
  32  	Header IfmaMsghdr2
  33  	Data   []byte
  34  }
  35  
  36  func (m *InterfaceMulticastAddrMessage) sockaddr() ([]Sockaddr, error) {
  37  	var sas [RTAX_MAX]Sockaddr
  38  	b := m.Data[:]
  39  	for i := uint(0); i < RTAX_MAX && len(b) >= minRoutingSockaddrLen; i++ {
  40  		if m.Header.Addrs&(1<<i) == 0 {
  41  			continue
  42  		}
  43  		rsa := (*RawSockaddr)(unsafe.Pointer(&b[0]))
  44  		switch rsa.Family {
  45  		case AF_LINK:
  46  			sa, err := parseSockaddrLink(b)
  47  			if err != nil {
  48  				return nil, err
  49  			}
  50  			sas[i] = sa
  51  			b = b[rsaAlignOf(int(rsa.Len)):]
  52  		case AF_INET, AF_INET6:
  53  			sa, err := parseSockaddrInet(b, rsa.Family)
  54  			if err != nil {
  55  				return nil, err
  56  			}
  57  			sas[i] = sa
  58  			b = b[rsaAlignOf(int(rsa.Len)):]
  59  		default:
  60  			sa, l, err := parseLinkLayerAddr(b)
  61  			if err != nil {
  62  				return nil, err
  63  			}
  64  			sas[i] = sa
  65  			b = b[l:]
  66  		}
  67  	}
  68  	return sas[:], nil
  69  }
  70