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 } 88
