route_freebsd.go

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