vendor/golang.org/x/net/route/sys_darwin.go

   1 // Copyright 2016 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 route
   6
   7 func (typ RIBType) parseable() bool {
   8         switch typ {
   9         case sysNET_RT_STAT, sysNET_RT_TRASH:
  10                 return false
  11         default:
  12                 return true
  13         }
  14 }
  15
  16 // RouteMetrics represents route metrics.
  17 type RouteMetrics struct {
  18         PathMTU int // path maximum transmission unit
  19 }
  20
  21 // SysType implements the SysType method of Sys interface.
  22 func (rmx *RouteMetrics) SysType() SysType { return SysMetrics }
  23
  24 // Sys implements the Sys method of Message interface.
  25 func (m *RouteMessage) Sys() []Sys {
  26         return []Sys{
  27                 &RouteMetrics{
  28                         PathMTU: int(nativeEndian.Uint32(m.raw[m.extOff+4 : m.extOff+8])),
  29                 },
  30         }
  31 }
  32
  33 // InterfaceMetrics represents interface metrics.
  34 type InterfaceMetrics struct {
  35         Type int // interface type
  36         MTU  int // maximum transmission unit
  37 }
  38
  39 // SysType implements the SysType method of Sys interface.
  40 func (imx *InterfaceMetrics) SysType() SysType { return SysMetrics }
  41
  42 // Sys implements the Sys method of Message interface.
  43 func (m *InterfaceMessage) Sys() []Sys {
  44         return []Sys{
  45                 &InterfaceMetrics{
  46                         Type: int(m.raw[m.extOff]),
  47                         MTU:  int(nativeEndian.Uint32(m.raw[m.extOff+8 : m.extOff+12])),
  48                 },
  49         }
  50 }
  51
  52 func probeRoutingStack() (int, map[int]*wireFormat) {
  53         rtm := &wireFormat{extOff: 36, bodyOff: sizeofRtMsghdrDarwin15}
  54         rtm.parse = rtm.parseRouteMessage
  55         rtm2 := &wireFormat{extOff: 36, bodyOff: sizeofRtMsghdr2Darwin15}
  56         rtm2.parse = rtm2.parseRouteMessage
  57         ifm := &wireFormat{extOff: 16, bodyOff: sizeofIfMsghdrDarwin15}
  58         ifm.parse = ifm.parseInterfaceMessage
  59         ifm2 := &wireFormat{extOff: 32, bodyOff: sizeofIfMsghdr2Darwin15}
  60         ifm2.parse = ifm2.parseInterfaceMessage
  61         ifam := &wireFormat{extOff: sizeofIfaMsghdrDarwin15, bodyOff: sizeofIfaMsghdrDarwin15}
  62         ifam.parse = ifam.parseInterfaceAddrMessage
  63         ifmam := &wireFormat{extOff: sizeofIfmaMsghdrDarwin15, bodyOff: sizeofIfmaMsghdrDarwin15}
  64         ifmam.parse = ifmam.parseInterfaceMulticastAddrMessage
  65         ifmam2 := &wireFormat{extOff: sizeofIfmaMsghdr2Darwin15, bodyOff: sizeofIfmaMsghdr2Darwin15}
  66         ifmam2.parse = ifmam2.parseInterfaceMulticastAddrMessage
  67         // Darwin kernels require 32-bit aligned access to routing facilities.
  68         return 4, map[int]*wireFormat{
  69                 sysRTM_ADD:       rtm,
  70                 sysRTM_DELETE:    rtm,
  71                 sysRTM_CHANGE:    rtm,
  72                 sysRTM_GET:       rtm,
  73                 sysRTM_LOSING:    rtm,
  74                 sysRTM_REDIRECT:  rtm,
  75                 sysRTM_MISS:      rtm,
  76                 sysRTM_LOCK:      rtm,
  77                 sysRTM_RESOLVE:   rtm,
  78                 sysRTM_NEWADDR:   ifam,
  79                 sysRTM_DELADDR:   ifam,
  80                 sysRTM_IFINFO:    ifm,
  81                 sysRTM_NEWMADDR:  ifmam,
  82                 sysRTM_DELMADDR:  ifmam,
  83                 sysRTM_IFINFO2:   ifm2,
  84                 sysRTM_NEWMADDR2: ifmam2,
  85                 sysRTM_GET2:      rtm2,
  86         }
  87 }