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Golang syscall.CmsgLen函数代码示例

本文整理汇总了Golang中syscall.CmsgLen函数的典型用法代码示例。如果您正苦于以下问题：Golang CmsgLen函数的具体用法？Golang CmsgLen怎么用？Golang CmsgLen使用的例子？那么恭喜您, 这里精选的函数代码示例或许可以为您提供帮助。


在下文中一共展示了CmsgLen函数的15个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Golang代码示例。

示例1: newControlMessage

func newControlMessage(opt *rawOpt) (oob []byte) {
	opt.Lock()
	defer opt.Unlock()
	l, off := 0, 0
	if opt.isset(FlagHopLimit) {
		l += syscall.CmsgSpace(4)
	}
	if opt.isset(pktinfo) {
		l += syscall.CmsgSpace(sysSizeofPacketInfo)
	}
	if l > 0 {
		oob = make([]byte, l)
		if opt.isset(FlagHopLimit) {
			m := (*syscall.Cmsghdr)(unsafe.Pointer(&oob[off]))
			m.Level = ianaProtocolIPv6
			m.Type = sysSockopt2292HopLimit
			m.SetLen(syscall.CmsgLen(4))
			off += syscall.CmsgSpace(4)
		}
		if opt.isset(pktinfo) {
			m := (*syscall.Cmsghdr)(unsafe.Pointer(&oob[off]))
			m.Level = ianaProtocolIPv6
			m.Type = sysSockopt2292PacketInfo
			m.SetLen(syscall.CmsgLen(sysSizeofPacketInfo))
			off += syscall.CmsgSpace(sysSizeofPacketInfo)
		}
	}
	return
}
开发者ID:Juraldinio，项目名称:vole，代码行数:29，代码来源:control_rfc2292_unix.go

示例2: newControlMessage

func newControlMessage(opt *rawOpt) (oob []byte) {
	opt.Lock()
	defer opt.Unlock()
	l, off := 0, 0
	if opt.isset(FlagTTL) {
		l += syscall.CmsgSpace(1)
	}
	if opt.isset(pktinfo) {
		l += syscall.CmsgSpace(syscall.SizeofInet4Pktinfo)
	}
	if l > 0 {
		oob = make([]byte, l)
		if opt.isset(FlagTTL) {
			m := (*syscall.Cmsghdr)(unsafe.Pointer(&oob[off]))
			m.Level = ianaProtocolIP
			m.Type = syscall.IP_RECVTTL
			m.SetLen(syscall.CmsgLen(1))
			off += syscall.CmsgSpace(1)
		}
		if opt.isset(pktinfo) {
			m := (*syscall.Cmsghdr)(unsafe.Pointer(&oob[off]))
			m.Level = ianaProtocolIP
			m.Type = syscall.IP_PKTINFO
			m.SetLen(syscall.CmsgLen(syscall.SizeofInet4Pktinfo))
			off += syscall.CmsgSpace(syscall.SizeofInet4Pktinfo)
		}
	}
	return
}
开发者ID:98pm，项目名称:docker，代码行数:29，代码来源:control_linux.go

示例3: marshalControlMessage

func marshalControlMessage(cm *ControlMessage) (oob []byte) {
	if cm == nil {
		return
	}
	l, off := 0, 0
	pion := false
	if cm.Src.To4() != nil || cm.IfIndex != 0 {
		pion = true
		l += syscall.CmsgSpace(syscall.SizeofInet4Pktinfo)
	}
	if l > 0 {
		oob = make([]byte, l)
		if pion {
			m := (*syscall.Cmsghdr)(unsafe.Pointer(&oob[off]))
			m.Level = ianaProtocolIP
			m.Type = syscall.IP_PKTINFO
			m.SetLen(syscall.CmsgLen(syscall.SizeofInet4Pktinfo))
			pi := (*syscall.Inet4Pktinfo)(unsafe.Pointer(&oob[off+syscall.CmsgLen(0)]))
			if ip := cm.Src.To4(); ip != nil {
				copy(pi.Addr[:], ip)
			}
			if cm.IfIndex != 0 {
				pi.Ifindex = int32(cm.IfIndex)
			}
			off += syscall.CmsgSpace(syscall.SizeofInet4Pktinfo)
		}
	}
	return
}
开发者ID:98pm，项目名称:docker，代码行数:29，代码来源:control_linux.go

示例4: newControlMessage

func newControlMessage(opt *rawOpt) (oob []byte) {
	opt.lock()
	defer opt.unlock()
	if opt.isset(FlagTTL) {
		b := make([]byte, syscall.CmsgSpace(1))
		cmsg := (*syscall.Cmsghdr)(unsafe.Pointer(&b[0]))
		cmsg.Level = ianaProtocolIP
		cmsg.Type = syscall.IP_RECVTTL
		cmsg.SetLen(syscall.CmsgLen(1))
		oob = append(oob, b...)
	}
	if opt.isset(FlagDst) {
		b := make([]byte, syscall.CmsgSpace(net.IPv4len))
		cmsg := (*syscall.Cmsghdr)(unsafe.Pointer(&b[0]))
		cmsg.Level = ianaProtocolIP
		cmsg.Type = syscall.IP_RECVDSTADDR
		cmsg.SetLen(syscall.CmsgLen(net.IPv4len))
		oob = append(oob, b...)
	}
	if opt.isset(FlagInterface) {
		b := make([]byte, syscall.CmsgSpace(syscall.SizeofSockaddrDatalink))
		cmsg := (*syscall.Cmsghdr)(unsafe.Pointer(&b[0]))
		cmsg.Level = ianaProtocolIP
		cmsg.Type = syscall.IP_RECVIF
		cmsg.SetLen(syscall.CmsgLen(syscall.SizeofSockaddrDatalink))
		oob = append(oob, b...)
	}
	return
}
开发者ID:rocksolidlabs，项目名称:go.net，代码行数:29，代码来源:control_bsd.go

示例5: marshalControlMessage

func marshalControlMessage(cm *ControlMessage) (oob []byte) {
	if cm == nil {
		return
	}
	pi := &syscall.Inet4Pktinfo{}
	pion := false
	if ip := cm.Src.To4(); ip != nil {
		copy(pi.Spec_dst[:], ip[:net.IPv4len])
		pion = true
	}
	if cm.IfIndex != 0 {
		pi.Ifindex = int32(cm.IfIndex)
		pion = true
	}
	if pion {
		b := make([]byte, syscall.CmsgSpace(syscall.SizeofInet4Pktinfo))
		cmsg := (*syscall.Cmsghdr)(unsafe.Pointer(&b[0]))
		cmsg.Level = ianaProtocolIP
		cmsg.Type = syscall.IP_PKTINFO
		cmsg.SetLen(syscall.CmsgLen(syscall.SizeofInet4Pktinfo))
		data := b[syscall.CmsgLen(0):]
		copy(data[:syscall.SizeofInet4Pktinfo], (*[syscall.SizeofInet4Pktinfo]byte)(unsafe.Pointer(pi))[:syscall.SizeofInet4Pktinfo])
		oob = append(oob, b...)
	}
	return
}
开发者ID:rocksolidlabs，项目名称:go.net，代码行数:26，代码来源:control_linux.go

示例6: marshalHopLimit

func marshalHopLimit(b []byte, cm *ControlMessage) []byte {
	m := (*syscall.Cmsghdr)(unsafe.Pointer(&b[0]))
	m.Level = iana.ProtocolIPv6
	m.Type = sysIPV6_HOPLIMIT
	m.SetLen(syscall.CmsgLen(4))
	if cm != nil {
		data := b[syscall.CmsgLen(0):]
		nativeEndian.PutUint32(data[:4], uint32(cm.HopLimit))
	}
	return b[syscall.CmsgSpace(4):]
}
开发者ID:mozilla，项目名称:tls-observatory，代码行数:11，代码来源:control_rfc3542_unix.go

示例7: marshalNextHop

func marshalNextHop(b []byte, cm *ControlMessage) []byte {
	m := (*syscall.Cmsghdr)(unsafe.Pointer(&b[0]))
	m.Level = iana.ProtocolIPv6
	m.Type = sysIPV6_NEXTHOP
	m.SetLen(syscall.CmsgLen(sysSizeofSockaddrInet6))
	if cm != nil {
		sa := (*sysSockaddrInet6)(unsafe.Pointer(&b[syscall.CmsgLen(0)]))
		sa.setSockaddr(cm.NextHop, cm.IfIndex)
	}
	return b[syscall.CmsgSpace(sysSizeofSockaddrInet6):]
}
开发者ID:anlaneg，项目名称:socketplane，代码行数:11，代码来源:control_rfc3542_unix.go

示例8: marshal2292HopLimit

func marshal2292HopLimit(b []byte, cm *ControlMessage) []byte {
	m := (*syscall.Cmsghdr)(unsafe.Pointer(&b[0]))
	m.Level = ianaProtocolIPv6
	m.Type = sysIPV6_2292HOPLIMIT
	m.SetLen(syscall.CmsgLen(4))
	if cm != nil {
		data := b[syscall.CmsgLen(0):]
		*(*int32)(unsafe.Pointer(&data[:4][0])) = int32(cm.HopLimit)
	}
	return b[syscall.CmsgSpace(4):]
}
开发者ID:xunmengfeng，项目名称:patchwork，代码行数:11，代码来源:control_rfc2292_unix.go

示例9: marshalHopLimit

func marshalHopLimit(b []byte, cm *ControlMessage) []byte {
	m := (*syscall.Cmsghdr)(unsafe.Pointer(&b[0]))
	m.Level = iana.ProtocolIPv6
	m.Type = sysIPV6_HOPLIMIT
	m.SetLen(syscall.CmsgLen(4))
	if cm != nil {
		data := b[syscall.CmsgLen(0):]
		// TODO(mikio): fix potential misaligned memory access
		*(*int32)(unsafe.Pointer(&data[:4][0])) = int32(cm.HopLimit)
	}
	return b[syscall.CmsgSpace(4):]
}
开发者ID:anlaneg，项目名称:socketplane，代码行数:12，代码来源:control_rfc3542_unix.go

示例10: newControlMessage

func newControlMessage(opt *rawOpt) (oob []byte) {
	opt.Lock()
	defer opt.Unlock()
	l, off := 0, 0
	if opt.isset(FlagTrafficClass) {
		l += syscall.CmsgSpace(4)
	}
	if opt.isset(FlagHopLimit) {
		l += syscall.CmsgSpace(4)
	}
	if opt.isset(pktinfo) {
		l += syscall.CmsgSpace(syscall.SizeofInet6Pktinfo)
	}
	if opt.isset(FlagPathMTU) {
		l += syscall.CmsgSpace(syscall.SizeofIPv6MTUInfo)
	}
	if l > 0 {
		oob = make([]byte, l)
		if opt.isset(FlagTrafficClass) {
			m := (*syscall.Cmsghdr)(unsafe.Pointer(&oob[off]))
			m.Level = ianaProtocolIPv6
			m.Type = syscall.IPV6_RECVTCLASS
			m.SetLen(syscall.CmsgLen(4))
			off += syscall.CmsgSpace(4)
		}
		if opt.isset(FlagHopLimit) {
			m := (*syscall.Cmsghdr)(unsafe.Pointer(&oob[off]))
			m.Level = ianaProtocolIPv6
			m.Type = syscall.IPV6_RECVHOPLIMIT
			m.SetLen(syscall.CmsgLen(4))
			off += syscall.CmsgSpace(4)
		}
		if opt.isset(pktinfo) {
			m := (*syscall.Cmsghdr)(unsafe.Pointer(&oob[off]))
			m.Level = ianaProtocolIPv6
			m.Type = syscall.IPV6_RECVPKTINFO
			m.SetLen(syscall.CmsgLen(syscall.SizeofInet6Pktinfo))
			off += syscall.CmsgSpace(syscall.SizeofInet6Pktinfo)
		}
		if opt.isset(FlagPathMTU) {
			m := (*syscall.Cmsghdr)(unsafe.Pointer(&oob[off]))
			m.Level = ianaProtocolIPv6
			m.Type = syscall.IPV6_RECVPATHMTU
			m.SetLen(syscall.CmsgLen(syscall.SizeofIPv6MTUInfo))
			off += syscall.CmsgSpace(syscall.SizeofIPv6MTUInfo)
		}
	}
	return
}
开发者ID:98pm，项目名称:docker，代码行数:49，代码来源:control_rfc3542_bsd.go

示例11: marshalTTL

func marshalTTL(b []byte, cm *ControlMessage) []byte {
	m := (*syscall.Cmsghdr)(unsafe.Pointer(&b[0]))
	m.Level = iana.ProtocolIP
	m.Type = sysIP_RECVTTL
	m.SetLen(syscall.CmsgLen(1))
	return b[syscall.CmsgSpace(1):]
}
开发者ID:cfibmers，项目名称:diego-release，代码行数:7，代码来源:control_unix.go

示例12: marshal2292PacketInfo

func marshal2292PacketInfo(b []byte, cm *ControlMessage) []byte {
	m := (*syscall.Cmsghdr)(unsafe.Pointer(&b[0]))
	m.Level = iana.ProtocolIPv6
	m.Type = sysIPV6_2292PKTINFO
	m.SetLen(syscall.CmsgLen(sizeofInet6Pktinfo))
	if cm != nil {
		pi := (*inet6Pktinfo)(unsafe.Pointer(&b[syscall.CmsgLen(0)]))
		if ip := cm.Src.To16(); ip != nil && ip.To4() == nil {
			copy(pi.Addr[:], ip)
		}
		if cm.IfIndex > 0 {
			pi.setIfindex(cm.IfIndex)
		}
	}
	return b[syscall.CmsgSpace(sizeofInet6Pktinfo):]
}
开发者ID:mozilla，项目名称:tls-observatory，代码行数:16，代码来源:control_rfc2292_unix.go

示例13: marshalPacketInfo

func marshalPacketInfo(b []byte, cm *ControlMessage) []byte {
	m := (*syscall.Cmsghdr)(unsafe.Pointer(&b[0]))
	m.Level = iana.ProtocolIP
	m.Type = sysIP_PKTINFO
	m.SetLen(syscall.CmsgLen(sysSizeofInetPktinfo))
	if cm != nil {
		pi := (*sysInetPktinfo)(unsafe.Pointer(&b[syscall.CmsgLen(0)]))
		if ip := cm.Src.To4(); ip != nil {
			copy(pi.Spec_dst[:], ip)
		}
		if cm.IfIndex > 0 {
			pi.setIfindex(cm.IfIndex)
		}
	}
	return b[syscall.CmsgSpace(sysSizeofInetPktinfo):]
}
开发者ID:anlaneg，项目名称:socketplane，代码行数:16，代码来源:control_pktinfo.go

示例14: marshalInterface

func marshalInterface(b []byte, cm *ControlMessage) []byte {
	m := (*syscall.Cmsghdr)(unsafe.Pointer(&b[0]))
	m.Level = iana.ProtocolIP
	m.Type = sysIP_RECVIF
	m.SetLen(syscall.CmsgLen(syscall.SizeofSockaddrDatalink))
	return b[syscall.CmsgSpace(syscall.SizeofSockaddrDatalink):]
}
开发者ID:anlaneg，项目名称:socketplane，代码行数:7，代码来源:control_bsd.go

示例15: marshalDst

func marshalDst(b []byte, cm *ControlMessage) []byte {
	m := (*syscall.Cmsghdr)(unsafe.Pointer(&b[0]))
	m.Level = iana.ProtocolIP
	m.Type = sysIP_RECVDSTADDR
	m.SetLen(syscall.CmsgLen(net.IPv4len))
	return b[syscall.CmsgSpace(net.IPv4len):]
}
开发者ID:anlaneg，项目名称:socketplane，代码行数:7，代码来源:control_bsd.go


注：本文中的syscall.CmsgLen函数示例由纯净天空整理自Github/MSDocs等开源代码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。