route_dragonfly.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  		// We don't support sockaddr_mpls for now.
  14  		p.Header.Addrs &= RTA_DST | RTA_GATEWAY | RTA_NETMASK | RTA_GENMASK | RTA_IFA | RTA_IFP | RTA_BRD | RTA_AUTHOR
  15  		return &RouteMessage{Header: p.Header, Data: b[SizeofRtMsghdr:any.Msglen]}
  16  	case RTM_IFINFO:
  17  		p := (*InterfaceMessage)(unsafe.Pointer(any))
  18  		return &InterfaceMessage{Header: p.Header, Data: b[SizeofIfMsghdr:any.Msglen]}
  19  	case RTM_IFANNOUNCE:
  20  		p := (*InterfaceAnnounceMessage)(unsafe.Pointer(any))
  21  		return &InterfaceAnnounceMessage{Header: p.Header}
  22  	case RTM_NEWADDR, RTM_DELADDR:
  23  		p := (*InterfaceAddrMessage)(unsafe.Pointer(any))
  24  		return &InterfaceAddrMessage{Header: p.Header, Data: b[SizeofIfaMsghdr:any.Msglen]}
  25  	case RTM_NEWMADDR, RTM_DELMADDR:
  26  		p := (*InterfaceMulticastAddrMessage)(unsafe.Pointer(any))
  27  		return &InterfaceMulticastAddrMessage{Header: p.Header, Data: b[SizeofIfmaMsghdr:any.Msglen]}
  28  	}
  29  	return nil
  30  }
  31  
  32  // InterfaceAnnounceMessage represents a routing message containing
  33  // network interface arrival and departure information.
  34  //
  35  // Deprecated: Use golang.org/x/net/route instead.
  36  type InterfaceAnnounceMessage struct {
  37  	Header IfAnnounceMsghdr
  38  }
  39  
  40  func (m *InterfaceAnnounceMessage) sockaddr() ([]Sockaddr, error) { return nil, nil }
  41  
  42  // InterfaceMulticastAddrMessage represents a routing message
  43  // containing network interface address entries.
  44  //
  45  // Deprecated: Use golang.org/x/net/route instead.
  46  type InterfaceMulticastAddrMessage struct {
  47  	Header IfmaMsghdr
  48  	Data   []byte
  49  }
  50  
  51  func (m *InterfaceMulticastAddrMessage) sockaddr() ([]Sockaddr, error) {
  52  	var sas [RTAX_MAX]Sockaddr
  53  	b := m.Data[:]
  54  	for i := uint(0); i < RTAX_MAX && len(b) >= minRoutingSockaddrLen; i++ {
  55  		if m.Header.Addrs&(1<<i) == 0 {
  56  			continue
  57  		}
  58  		rsa := (*RawSockaddr)(unsafe.Pointer(&b[0]))
  59  		switch rsa.Family {
  60  		case AF_LINK:
  61  			sa, err := parseSockaddrLink(b)
  62  			if err != nil {
  63  				return nil, err
  64  			}
  65  			sas[i] = sa
  66  			b = b[rsaAlignOf(int(rsa.Len)):]
  67  		case AF_INET, AF_INET6:
  68  			sa, err := parseSockaddrInet(b, rsa.Family)
  69  			if err != nil {
  70  				return nil, err
  71  			}
  72  			sas[i] = sa
  73  			b = b[rsaAlignOf(int(rsa.Len)):]
  74  		default:
  75  			sa, l, err := parseLinkLayerAddr(b)
  76  			if err != nil {
  77  				return nil, err
  78  			}
  79  			sas[i] = sa
  80  			b = b[l:]
  81  		}
  82  	}
  83  	return sas[:], nil
  84  }
  85