github.com/Andyfoo/golang/x/net@v0.0.0-20190901054642-57c1bf301704/route/sys_dragonfly.go (about)

     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  import "unsafe"
     8  
     9  func (typ RIBType) parseable() bool { return true }
    10  
    11  // RouteMetrics represents route metrics.
    12  type RouteMetrics struct {
    13  	PathMTU int // path maximum transmission unit
    14  }
    15  
    16  // SysType implements the SysType method of Sys interface.
    17  func (rmx *RouteMetrics) SysType() SysType { return SysMetrics }
    18  
    19  // Sys implements the Sys method of Message interface.
    20  func (m *RouteMessage) Sys() []Sys {
    21  	return []Sys{
    22  		&RouteMetrics{
    23  			PathMTU: int(nativeEndian.Uint64(m.raw[m.extOff+8 : m.extOff+16])),
    24  		},
    25  	}
    26  }
    27  
    28  // InterfaceMetrics represents interface metrics.
    29  type InterfaceMetrics struct {
    30  	Type int // interface type
    31  	MTU  int // maximum transmission unit
    32  }
    33  
    34  // SysType implements the SysType method of Sys interface.
    35  func (imx *InterfaceMetrics) SysType() SysType { return SysMetrics }
    36  
    37  // Sys implements the Sys method of Message interface.
    38  func (m *InterfaceMessage) Sys() []Sys {
    39  	return []Sys{
    40  		&InterfaceMetrics{
    41  			Type: int(m.raw[m.extOff]),
    42  			MTU:  int(nativeEndian.Uint32(m.raw[m.extOff+8 : m.extOff+12])),
    43  		},
    44  	}
    45  }
    46  
    47  func probeRoutingStack() (int, map[int]*wireFormat) {
    48  	var p uintptr
    49  	rtm := &wireFormat{extOff: 40, bodyOff: sizeofRtMsghdrDragonFlyBSD4}
    50  	rtm.parse = rtm.parseRouteMessage
    51  	ifm := &wireFormat{extOff: 16, bodyOff: sizeofIfMsghdrDragonFlyBSD4}
    52  	ifm.parse = ifm.parseInterfaceMessage
    53  	ifam := &wireFormat{extOff: sizeofIfaMsghdrDragonFlyBSD4, bodyOff: sizeofIfaMsghdrDragonFlyBSD4}
    54  	ifam.parse = ifam.parseInterfaceAddrMessage
    55  	ifmam := &wireFormat{extOff: sizeofIfmaMsghdrDragonFlyBSD4, bodyOff: sizeofIfmaMsghdrDragonFlyBSD4}
    56  	ifmam.parse = ifmam.parseInterfaceMulticastAddrMessage
    57  	ifanm := &wireFormat{extOff: sizeofIfAnnouncemsghdrDragonFlyBSD4, bodyOff: sizeofIfAnnouncemsghdrDragonFlyBSD4}
    58  	ifanm.parse = ifanm.parseInterfaceAnnounceMessage
    59  	return int(unsafe.Sizeof(p)), map[int]*wireFormat{
    60  		sysRTM_ADD:        rtm,
    61  		sysRTM_DELETE:     rtm,
    62  		sysRTM_CHANGE:     rtm,
    63  		sysRTM_GET:        rtm,
    64  		sysRTM_LOSING:     rtm,
    65  		sysRTM_REDIRECT:   rtm,
    66  		sysRTM_MISS:       rtm,
    67  		sysRTM_LOCK:       rtm,
    68  		sysRTM_RESOLVE:    rtm,
    69  		sysRTM_NEWADDR:    ifam,
    70  		sysRTM_DELADDR:    ifam,
    71  		sysRTM_IFINFO:     ifm,
    72  		sysRTM_NEWMADDR:   ifmam,
    73  		sysRTM_DELMADDR:   ifmam,
    74  		sysRTM_IFANNOUNCE: ifanm,
    75  	}
    76  }