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Source file src/syscall/route_freebsd.go

Documentation: syscall

     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  // See http://www.freebsd.org/doc/en/books/porters-handbook/freebsd-versions.html.
    10  var freebsdVersion uint32
    11  
    12  func init() {
    13  	freebsdVersion, _ = SysctlUint32("kern.osreldate")
    14  	conf, _ := Sysctl("kern.conftxt")
    15  	for i, j := 0, 0; j < len(conf); j++ {
    16  		if conf[j] != '\n' {
    17  			continue
    18  		}
    19  		s := conf[i:j]
    20  		i = j + 1
    21  		if len(s) > len("machine") && s[:len("machine")] == "machine" {
    22  			s = s[len("machine"):]
    23  			for k := 0; k < len(s); k++ {
    24  				if s[k] == ' ' || s[k] == '\t' {
    25  					s = s[1:]
    26  				}
    27  				break
    28  			}
    29  			freebsdConfArch = s
    30  			break
    31  		}
    32  	}
    33  }
    34  
    35  func (any *anyMessage) toRoutingMessage(b []byte) RoutingMessage {
    36  	switch any.Type {
    37  	case RTM_ADD, RTM_DELETE, RTM_CHANGE, RTM_GET, RTM_LOSING, RTM_REDIRECT, RTM_MISS, RTM_LOCK, RTM_RESOLVE:
    38  		return any.parseRouteMessage(b)
    39  	case RTM_IFINFO:
    40  		return any.parseInterfaceMessage(b)
    41  	case RTM_IFANNOUNCE:
    42  		p := (*InterfaceAnnounceMessage)(unsafe.Pointer(any))
    43  		return &InterfaceAnnounceMessage{Header: p.Header}
    44  	case RTM_NEWADDR, RTM_DELADDR:
    45  		p := (*InterfaceAddrMessage)(unsafe.Pointer(any))
    46  		return &InterfaceAddrMessage{Header: p.Header, Data: b[SizeofIfaMsghdr:any.Msglen]}
    47  	case RTM_NEWMADDR, RTM_DELMADDR:
    48  		p := (*InterfaceMulticastAddrMessage)(unsafe.Pointer(any))
    49  		return &InterfaceMulticastAddrMessage{Header: p.Header, Data: b[SizeofIfmaMsghdr:any.Msglen]}
    50  	}
    51  	return nil
    52  }
    53  
    54  // InterfaceAnnounceMessage represents a routing message containing
    55  // network interface arrival and departure information.
    56  //
    57  // Deprecated: Use golang.org/x/net/route instead.
    58  type InterfaceAnnounceMessage struct {
    59  	Header IfAnnounceMsghdr
    60  }
    61  
    62  func (m *InterfaceAnnounceMessage) sockaddr() ([]Sockaddr, error) { return nil, nil }
    63  
    64  // InterfaceMulticastAddrMessage represents a routing message
    65  // containing network interface address entries.
    66  //
    67  // Deprecated: Use golang.org/x/net/route instead.
    68  type InterfaceMulticastAddrMessage struct {
    69  	Header IfmaMsghdr
    70  	Data   []byte
    71  }
    72  
    73  func (m *InterfaceMulticastAddrMessage) sockaddr() ([]Sockaddr, error) {
    74  	var sas [RTAX_MAX]Sockaddr
    75  	b := m.Data[:]
    76  	for i := uint(0); i < RTAX_MAX && len(b) >= minRoutingSockaddrLen; i++ {
    77  		if m.Header.Addrs&(1<<i) == 0 {
    78  			continue
    79  		}
    80  		rsa := (*RawSockaddr)(unsafe.Pointer(&b[0]))
    81  		switch rsa.Family {
    82  		case AF_LINK:
    83  			sa, err := parseSockaddrLink(b)
    84  			if err != nil {
    85  				return nil, err
    86  			}
    87  			sas[i] = sa
    88  			b = b[rsaAlignOf(int(rsa.Len)):]
    89  		case AF_INET, AF_INET6:
    90  			sa, err := parseSockaddrInet(b, rsa.Family)
    91  			if err != nil {
    92  				return nil, err
    93  			}
    94  			sas[i] = sa
    95  			b = b[rsaAlignOf(int(rsa.Len)):]
    96  		default:
    97  			sa, l, err := parseLinkLayerAddr(b)
    98  			if err != nil {
    99  				return nil, err
   100  			}
   101  			sas[i] = sa
   102  			b = b[l:]
   103  		}
   104  	}
   105  	return sas[:], nil
   106  }
   107  

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