src/syscall/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 }