Source file src/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	}
    88	

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