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Source file src/syscall/route_freebsd.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"
  
  // See http://www.freebsd.org/doc/en/books/porters-handbook/freebsd-versions.html.
  var freebsdVersion uint32
  
  func init() {
  	freebsdVersion, _ = SysctlUint32("kern.osreldate")
  	conf, _ := Sysctl("kern.conftxt")
  	for i, j := 0, 0; j < len(conf); j++ {
  		if conf[j] != '\n' {
  			continue
  		}
  		s := conf[i:j]
  		i = j + 1
  		if len(s) > len("machine") && s[:len("machine")] == "machine" {
  			s = s[len("machine"):]
  			for k := 0; k < len(s); k++ {
  				if s[k] == ' ' || s[k] == '\t' {
  					s = s[1:]
  				}
  				break
  			}
  			freebsdConfArch = s
  			break
  		}
  	}
  }
  
  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:
  		return any.parseRouteMessage(b)
  	case RTM_IFINFO:
  		return any.parseInterfaceMessage(b)
  	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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