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// Copyright 2016 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package route
import (
"syscall"
"unsafe"
)
func (typ RIBType) parseable() bool { return true }
// RouteMetrics represents route metrics.
type RouteMetrics struct {
PathMTU int // path maximum transmission unit
}
// SysType implements the SysType method of Sys interface.
func (rmx *RouteMetrics) SysType() SysType { return SysMetrics }
// Sys implements the Sys method of Message interface.
func (m *RouteMessage) Sys() []Sys {
return []Sys{
&RouteMetrics{
PathMTU: int(nativeEndian.Uint64(m.raw[m.extOff+8 : m.extOff+16])),
},
}
}
// InterfaceMetrics represents interface metrics.
type InterfaceMetrics struct {
Type int // interface type
MTU int // maximum transmission unit
}
// SysType implements the SysType method of Sys interface.
func (imx *InterfaceMetrics) SysType() SysType { return SysMetrics }
// Sys implements the Sys method of Message interface.
func (m *InterfaceMessage) Sys() []Sys {
return []Sys{
&InterfaceMetrics{
Type: int(m.raw[m.extOff]),
MTU: int(nativeEndian.Uint32(m.raw[m.extOff+8 : m.extOff+12])),
},
}
}
func probeRoutingStack() (int, map[int]*wireFormat) {
var p uintptr
rtm := &wireFormat{extOff: 40, bodyOff: sizeofRtMsghdrDragonFlyBSD4}
rtm.parse = rtm.parseRouteMessage
ifm := &wireFormat{extOff: 16, bodyOff: sizeofIfMsghdrDragonFlyBSD4}
ifm.parse = ifm.parseInterfaceMessage
ifam := &wireFormat{extOff: sizeofIfaMsghdrDragonFlyBSD4, bodyOff: sizeofIfaMsghdrDragonFlyBSD4}
ifam.parse = ifam.parseInterfaceAddrMessage
ifmam := &wireFormat{extOff: sizeofIfmaMsghdrDragonFlyBSD4, bodyOff: sizeofIfmaMsghdrDragonFlyBSD4}
ifmam.parse = ifmam.parseInterfaceMulticastAddrMessage
ifanm := &wireFormat{extOff: sizeofIfAnnouncemsghdrDragonFlyBSD4, bodyOff: sizeofIfAnnouncemsghdrDragonFlyBSD4}
ifanm.parse = ifanm.parseInterfaceAnnounceMessage
rel, _ := syscall.SysctlUint32("kern.osreldate")
if rel >= 500705 {
// https://github.com/DragonFlyBSD/DragonFlyBSD/commit/43a373152df2d405c9940983e584e6a25e76632d
// but only the size of struct ifa_msghdr actually changed
rtmVersion = 7
ifam.bodyOff = sizeofIfaMsghdrDragonFlyBSD58
}
return int(unsafe.Sizeof(p)), map[int]*wireFormat{
syscall.RTM_ADD: rtm,
syscall.RTM_DELETE: rtm,
syscall.RTM_CHANGE: rtm,
syscall.RTM_GET: rtm,
syscall.RTM_LOSING: rtm,
syscall.RTM_REDIRECT: rtm,
syscall.RTM_MISS: rtm,
syscall.RTM_LOCK: rtm,
syscall.RTM_RESOLVE: rtm,
syscall.RTM_NEWADDR: ifam,
syscall.RTM_DELADDR: ifam,
syscall.RTM_IFINFO: ifm,
syscall.RTM_NEWMADDR: ifmam,
syscall.RTM_DELMADDR: ifmam,
syscall.RTM_IFANNOUNCE: ifanm,
}
}
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