tun2Pipe

Documentation

Index

• Constants
• func ChangePacket(ip4 *layers.IPv4, tcp *layers.TCP) []byte
• func GetExtensionBlock(data []byte) ([]byte, error)
• func GetSNBlock(data []byte) ([]byte, error)
• func GetSNIBlock(data []byte) ([]byte, error)
• func ParseHost(data []byte) string
• func PrintFlow(pre string, ip4 *layers.IPv4, tcp *layers.TCP)
• func ProtectConn(conn syscall.Conn) error
• func WrapIPPacketForUdp(srcIp, DstIp net.IP, srcPort, dstPort int, payload []byte) []byte
• type ByPassIPs
  • func ByPassInst() *ByPassIPs
  • func (bp *ByPassIPs) Hit(ip net.IP) bool
  • func (bp *ByPassIPs) Load(IPS string)
• type ConnProtect
• type DnsProxy
  • func NewDnsCache() (*DnsProxy, error)
  • func (c *DnsProxy) DnsWaitResponse()
  • func (c *DnsProxy) Get(id uint16) *QueryState
  • func (c *DnsProxy) Pop(id uint16) *QueryState
  • func (c *DnsProxy) Put(qs *QueryState)
• type QueryState
• type Session
  • func (s *Session) ToString() string
• type Tun2Pipe
  • func New(proxyAddr string) (*Tun2Pipe, error)
  • func (t2s *Tun2Pipe) AddSession(portKey int, s *Session)
  • func (t2s *Tun2Pipe) Finish()
  • func (t2s *Tun2Pipe) GetSession(key int) *Session
  • func (t2s *Tun2Pipe) GetTarget(conn net.Conn) string
  • func (t2s *Tun2Pipe) InputPacket(buf []byte)
  • func (t2s *Tun2Pipe) ProcessTcpPacket(ip4 *layers.IPv4, tcp *layers.TCP)
  • func (t2s *Tun2Pipe) Proxying(done chan error)
  • func (t2s *Tun2Pipe) RemoveFromSession(keyPort int)
  • func (t2s *Tun2Pipe) RemoveSession(key int)
• type UdpProxy
  • func NewUdpProxy() *UdpProxy
  • func (up *UdpProxy) ExpireOldSession()
  • func (up *UdpProxy) ReceivePacket(ip4 *layers.IPv4, udp *layers.UDP)
• type UdpSession
  • func (s *UdpSession) IsExpire() bool
  • func (s *UdpSession) ProxyOut(data []byte) (int, error)
  • func (s *UdpSession) UpdateTime()
  • func (s *UdpSession) WaitingIn()
• type VpnDelegate

Constants

const (
	SysDialTimeOut    = time.Second * 2
	UDPSessionTimeOut = time.Second * 80
	MTU               = math.MaxInt16
	InnerPivotPort    = 51414 //TODO:: this port should be refactored
)

const TLSHeaderLength = 5

Functions

func ChangePacket

func ChangePacket(ip4 *layers.IPv4, tcp *layers.TCP) []byte

func GetExtensionBlock

func GetExtensionBlock(data []byte) ([]byte, error)

func GetSNBlock

func GetSNBlock(data []byte) ([]byte, error)

func GetSNIBlock

func GetSNIBlock(data []byte) ([]byte, error)

func ParseHost

func ParseHost(data []byte) string

func PrintFlow

func PrintFlow(pre string, ip4 *layers.IPv4, tcp *layers.TCP)

func ProtectConn

func ProtectConn(conn syscall.Conn) error

func WrapIPPacketForUdp

func WrapIPPacketForUdp(srcIp, DstIp net.IP, srcPort, dstPort int, payload []byte) []byte

Types

type ByPassIPs

type ByPassIPs struct {
	Masks map[string]net.IPMask
	IP    map[string]struct{}
	sync.RWMutex
}

func ByPassInst

func ByPassInst() *ByPassIPs

func (*ByPassIPs) Hit

func (bp *ByPassIPs) Hit(ip net.IP) bool

func (*ByPassIPs) Load

func (bp *ByPassIPs) Load(IPS string)

type ConnProtect

type ConnProtect func(fd uintptr)

var Protector ConnProtect

type DnsProxy

type DnsProxy struct {
	sync.RWMutex

	VpnWriteBack io.WriteCloser
	// contains filtered or unexported fields
}

func NewDnsCache

func NewDnsCache() (*DnsProxy, error)

func (*DnsProxy) DnsWaitResponse

func (c *DnsProxy) DnsWaitResponse()

func (*DnsProxy) Get

func (c *DnsProxy) Get(id uint16) *QueryState

func (*DnsProxy) Pop

func (c *DnsProxy) Pop(id uint16) *QueryState

func (*DnsProxy) Put

func (c *DnsProxy) Put(qs *QueryState)

type QueryState

type QueryState struct {
	QueryTime     time.Time
	ClientQueryID uint16
	ClientIP      net.IP
	ClientPort    layers.UDPPort
	RemoteIp      net.IP
	RemotePort    layers.UDPPort
}

type Session

type Session struct {
	Pipe       *directPipe
	UPTime     time.Time
	RemoteIP   net.IP
	RemotePort int
	ServerPort int

	HostName string
	// contains filtered or unexported fields
}

func (*Session) ToString

func (s *Session) ToString() string

type Tun2Pipe

type Tun2Pipe struct {
	sync.RWMutex

	SessionCache map[int]*Session
	// contains filtered or unexported fields
}

func New

func New(proxyAddr string) (*Tun2Pipe, error)

func (*Tun2Pipe) AddSession

func (t2s *Tun2Pipe) AddSession(portKey int, s *Session)

func (*Tun2Pipe) Finish

func (t2s *Tun2Pipe) Finish()

func (*Tun2Pipe) GetSession

func (t2s *Tun2Pipe) GetSession(key int) *Session

func (*Tun2Pipe) GetTarget

func (t2s *Tun2Pipe) GetTarget(conn net.Conn) string

func (*Tun2Pipe) InputPacket

func (t2s *Tun2Pipe) InputPacket(buf []byte)

func (*Tun2Pipe) ProcessTcpPacket

func (t2s *Tun2Pipe) ProcessTcpPacket(ip4 *layers.IPv4, tcp *layers.TCP)

func (*Tun2Pipe) Proxying

func (t2s *Tun2Pipe) Proxying(done chan error)

func (*Tun2Pipe) RemoveFromSession

func (t2s *Tun2Pipe) RemoveFromSession(keyPort int)

func (*Tun2Pipe) RemoveSession

func (t2s *Tun2Pipe) RemoveSession(key int)

type UdpProxy

type UdpProxy struct {
	sync.RWMutex
	Done       chan error
	NatSession map[int]*UdpSession
}

func NewUdpProxy

func NewUdpProxy() *UdpProxy

func (*UdpProxy) ExpireOldSession

func (up *UdpProxy) ExpireOldSession()

func (*UdpProxy) ReceivePacket

func (up *UdpProxy) ReceivePacket(ip4 *layers.IPv4, udp *layers.UDP)

type UdpSession

type UdpSession struct {
	sync.RWMutex
	*net.UDPConn
	UTime   time.Time
	SrcIP   net.IP
	SrcPort int
	ID      string
}

TODO::to make sure this is usable

func (*UdpSession) IsExpire

func (s *UdpSession) IsExpire() bool

func (*UdpSession) ProxyOut

func (s *UdpSession) ProxyOut(data []byte) (int, error)

func (*UdpSession) UpdateTime

func (s *UdpSession) UpdateTime()

func (*UdpSession) WaitingIn

func (s *UdpSession) WaitingIn()

type VpnDelegate

type VpnDelegate interface {
	ByPass(fd int32) bool
	io.Writer
	Log(str string) //TODO::variadic function
}

var VpnInstance VpnDelegate = nil