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Source file src/syscall/route_dragonfly.go

Documentation: syscall

  // 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.
  
  package syscall
  
  import "unsafe"
  
  func (any *anyMessage) toRoutingMessage(b []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))
  		// We don't support sockaddr_mpls for now.
  		p.Header.Addrs &= RTA_DST | RTA_GATEWAY | RTA_NETMASK | RTA_GENMASK | RTA_IFA | RTA_IFP | RTA_BRD | RTA_AUTHOR
  		return &RouteMessage{Header: p.Header, Data: b[SizeofRtMsghdr:any.Msglen]}
  	case RTM_IFINFO:
  		p := (*InterfaceMessage)(unsafe.Pointer(any))
  		return &InterfaceMessage{Header: p.Header, Data: b[SizeofIfMsghdr:any.Msglen]}
  	case RTM_IFANNOUNCE:
  		p := (*InterfaceAnnounceMessage)(unsafe.Pointer(any))
  		return &InterfaceAnnounceMessage{Header: p.Header}
  	case RTM_NEWADDR, RTM_DELADDR:
  		p := (*InterfaceAddrMessage)(unsafe.Pointer(any))
  		return &InterfaceAddrMessage{Header: p.Header, Data: b[SizeofIfaMsghdr:any.Msglen]}
  	case RTM_NEWMADDR, RTM_DELMADDR:
  		p := (*InterfaceMulticastAddrMessage)(unsafe.Pointer(any))
  		return &InterfaceMulticastAddrMessage{Header: p.Header, Data: b[SizeofIfmaMsghdr:any.Msglen]}
  	}
  	return nil
  }
  
  // InterfaceAnnounceMessage represents a routing message containing
  // network interface arrival and departure information.
  //
  // Deprecated: Use golang.org/x/net/route instead.
  type InterfaceAnnounceMessage struct {
  	Header IfAnnounceMsghdr
  }
  
  func (m *InterfaceAnnounceMessage) sockaddr() ([]Sockaddr, error) { return nil, nil }
  
  // InterfaceMulticastAddrMessage represents a routing message
  // containing network interface address entries.
  //
  // Deprecated: Use golang.org/x/net/route instead.
  type InterfaceMulticastAddrMessage struct {
  	Header IfmaMsghdr
  	Data   []byte
  }
  
  func (m *InterfaceMulticastAddrMessage) sockaddr() ([]Sockaddr, error) {
  	var sas [RTAX_MAX]Sockaddr
  	b := m.Data[:]
  	for i := uint(0); i < RTAX_MAX && len(b) >= minRoutingSockaddrLen; i++ {
  		if m.Header.Addrs&(1<<i) == 0 {
  			continue
  		}
  		rsa := (*RawSockaddr)(unsafe.Pointer(&b[0]))
  		switch rsa.Family {
  		case AF_LINK:
  			sa, err := parseSockaddrLink(b)
  			if err != nil {
  				return nil, err
  			}
  			sas[i] = sa
  			b = b[rsaAlignOf(int(rsa.Len)):]
  		case AF_INET, AF_INET6:
  			sa, err := parseSockaddrInet(b, rsa.Family)
  			if err != nil {
  				return nil, err
  			}
  			sas[i] = sa
  			b = b[rsaAlignOf(int(rsa.Len)):]
  		default:
  			sa, l, err := parseLinkLayerAddr(b)
  			if err != nil {
  				return nil, err
  			}
  			sas[i] = sa
  			b = b[l:]
  		}
  	}
  	return sas[:], nil
  }
  

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