github.com/hxx258456/ccgo@v0.0.5-0.20230213014102-48b35f46f66f/net/route/sys_netbsd.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  func (typ RIBType) parseable() bool { return true }
     8  
     9  // RouteMetrics represents route metrics.
    10  type RouteMetrics struct {
    11  	PathMTU int // path maximum transmission unit
    12  }
    13  
    14  // SysType implements the SysType method of Sys interface.
    15  func (rmx *RouteMetrics) SysType() SysType { return SysMetrics }
    16  
    17  // Sys implements the Sys method of Message interface.
    18  func (m *RouteMessage) Sys() []Sys {
    19  	return []Sys{
    20  		&RouteMetrics{
    21  			PathMTU: int(nativeEndian.Uint64(m.raw[m.extOff+8 : m.extOff+16])),
    22  		},
    23  	}
    24  }
    25  
    26  // RouteMetrics represents route metrics.
    27  type InterfaceMetrics struct {
    28  	Type int // interface type
    29  	MTU  int // maximum transmission unit
    30  }
    31  
    32  // SysType implements the SysType method of Sys interface.
    33  func (imx *InterfaceMetrics) SysType() SysType { return SysMetrics }
    34  
    35  // Sys implements the Sys method of Message interface.
    36  func (m *InterfaceMessage) Sys() []Sys {
    37  	return []Sys{
    38  		&InterfaceMetrics{
    39  			Type: int(m.raw[m.extOff]),
    40  			MTU:  int(nativeEndian.Uint32(m.raw[m.extOff+8 : m.extOff+12])),
    41  		},
    42  	}
    43  }
    44  
    45  func probeRoutingStack() (int, map[int]*wireFormat) {
    46  	rtm := &wireFormat{extOff: 40, bodyOff: sizeofRtMsghdrNetBSD7}
    47  	rtm.parse = rtm.parseRouteMessage
    48  	ifm := &wireFormat{extOff: 16, bodyOff: sizeofIfMsghdrNetBSD7}
    49  	ifm.parse = ifm.parseInterfaceMessage
    50  	ifam := &wireFormat{extOff: sizeofIfaMsghdrNetBSD7, bodyOff: sizeofIfaMsghdrNetBSD7}
    51  	ifam.parse = ifam.parseInterfaceAddrMessage
    52  	ifanm := &wireFormat{extOff: sizeofIfAnnouncemsghdrNetBSD7, bodyOff: sizeofIfAnnouncemsghdrNetBSD7}
    53  	ifanm.parse = ifanm.parseInterfaceAnnounceMessage
    54  	// NetBSD 6 and above kernels require 64-bit aligned access to
    55  	// routing facilities.
    56  	return 8, map[int]*wireFormat{
    57  		sysRTM_ADD:        rtm,
    58  		sysRTM_DELETE:     rtm,
    59  		sysRTM_CHANGE:     rtm,
    60  		sysRTM_GET:        rtm,
    61  		sysRTM_LOSING:     rtm,
    62  		sysRTM_REDIRECT:   rtm,
    63  		sysRTM_MISS:       rtm,
    64  		sysRTM_LOCK:       rtm,
    65  		sysRTM_RESOLVE:    rtm,
    66  		sysRTM_NEWADDR:    ifam,
    67  		sysRTM_DELADDR:    ifam,
    68  		sysRTM_IFANNOUNCE: ifanm,
    69  		sysRTM_IFINFO:     ifm,
    70  	}
    71  }