Begin generic Bind implementation

This commit is contained in:
Mathias Hall-Andersen 2017-11-19 00:21:58 +01:00
parent d10126f883
commit a79fdc13a2
4 changed files with 99 additions and 54 deletions

View File

@ -24,11 +24,9 @@ type Bind interface {
*/ */
type Endpoint interface { type Endpoint interface {
ClearSrc() // clears the source address ClearSrc() // clears the source address
ClearDst() // clears the destination address
SrcToString() string // returns the local source address (ip:port) SrcToString() string // returns the local source address (ip:port)
DstToString() string // returns the destination address (ip:port) DstToString() string // returns the destination address (ip:port)
DstToBytes() []byte // used for mac2 cookie calculations DstToBytes() []byte // used for mac2 cookie calculations
SetDst(string) error // used for manually setting the endpoint (uapi)
DstIP() net.IP DstIP() net.IP
SrcIP() net.IP SrcIP() net.IP
} }
@ -92,7 +90,7 @@ func UpdateUDPListener(device *Device) error {
// bind to new port // bind to new port
var err error var err error
netc.bind, netc.port, err = CreateUDPBind(netc.port) netc.bind, netc.port, err = CreateBind(netc.port)
if err != nil { if err != nil {
netc.bind = nil netc.bind = nil
return err return err

View File

@ -13,11 +13,68 @@ import (
* See conn_linux.go for an implementation on the linux platform. * See conn_linux.go for an implementation on the linux platform.
*/ */
type Endpoint *net.UDPAddr type NativeBind struct {
ipv4 *net.UDPConn
ipv6 *net.UDPConn
}
type NativeBind *net.UDPConn type NativeEndpoint net.UDPAddr
func CreateUDPBind(port uint16) (UDPBind, uint16, error) { var _ Bind = (*NativeBind)(nil)
var _ Endpoint = (*NativeEndpoint)(nil)
func CreateEndpoint(s string) (Endpoint, error) {
addr, err := parseEndpoint(s)
return (addr).(*NativeEndpoint), err
}
func (_ *NativeEndpoint) ClearSrc() {}
func (e *NativeEndpoint) DstIP() net.IP {
return (*net.UDPAddr)(e).IP
}
func (e *NativeEndpoint) SrcIP() net.IP {
return nil // not supported
}
func (e *NativeEndpoint) DstToBytes() []byte {
addr := (*net.UDPAddr)(e)
out := addr.IP.([]byte)
out = append(out, byte(addr.Port&0xff))
out = append(out, byte((addr.Port>>8)&0xff))
return out
}
func (e *NativeEndpoint) DstToString() string {
return (*net.UDPAddr)(e).String()
}
func (e *NativeEndpoint) SrcToString() string {
return ""
}
func listenNet(net string, port int) (*net.UDPConn, int, error) {
// listen
conn, err := net.ListenUDP("udp", &UDPAddr{Port: port})
if err != nil {
return nil, 0, err
}
// retrieve port
laddr := conn.LocalAddr()
uaddr, _ = net.ResolveUDPAddr(
laddr.Network(),
laddr.String(),
)
return conn, uaddr.Port, nil
}
func CreateBind(port uint16) (Bind, uint16, error) {
// listen // listen
@ -38,9 +95,3 @@ func CreateUDPBind(port uint16) (UDPBind, uint16, error) {
) )
return uaddr.Port return uaddr.Port
} }
func (_ Endpoint) ClearSrc() {}
func SetMark(conn *net.UDPConn, value uint32) error {
return nil
}

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@ -50,11 +50,44 @@ func ntohs(val uint16) uint16 {
return binary.BigEndian.Uint16((*tmp)[:]) return binary.BigEndian.Uint16((*tmp)[:])
} }
func NewEndpoint() Endpoint { func CreateEndpoint(s string) (Endpoint, error) {
return &NativeEndpoint{} var end NativeEndpoint
addr, err := parseEndpoint(s)
if err != nil {
return nil, err
} }
func CreateUDPBind(port uint16) (Bind, uint16, error) { ipv4 := addr.IP.To4()
if ipv4 != nil {
dst := (*unix.RawSockaddrInet4)(unsafe.Pointer(&end.dst))
dst.Family = unix.AF_INET
dst.Port = htons(uint16(addr.Port))
dst.Zero = [8]byte{}
copy(dst.Addr[:], ipv4)
end.ClearSrc()
return &end, nil
}
ipv6 := addr.IP.To16()
if ipv6 != nil {
zone, err := zoneToUint32(addr.Zone)
if err != nil {
return nil, err
}
dst := &end.dst
dst.Family = unix.AF_INET6
dst.Port = htons(uint16(addr.Port))
dst.Flowinfo = 0
dst.Scope_id = zone
copy(dst.Addr[:], ipv6[:])
end.ClearSrc()
return &end, nil
}
return nil, errors.New("Failed to recognize IP address format")
}
func CreateBind(port uint16) (Bind, uint16, error) {
var err error var err error
var bind NativeBind var bind NativeBind
@ -325,42 +358,6 @@ func create6(port uint16) (int, uint16, error) {
return fd, uint16(addr.Port), err return fd, uint16(addr.Port), err
} }
func (end *NativeEndpoint) SetDst(s string) error {
addr, err := parseEndpoint(s)
if err != nil {
return err
}
ipv4 := addr.IP.To4()
if ipv4 != nil {
dst := (*unix.RawSockaddrInet4)(unsafe.Pointer(&end.dst))
dst.Family = unix.AF_INET
dst.Port = htons(uint16(addr.Port))
dst.Zero = [8]byte{}
copy(dst.Addr[:], ipv4)
end.ClearSrc()
return nil
}
ipv6 := addr.IP.To16()
if ipv6 != nil {
zone, err := zoneToUint32(addr.Zone)
if err != nil {
return err
}
dst := &end.dst
dst.Family = unix.AF_INET6
dst.Port = htons(uint16(addr.Port))
dst.Flowinfo = 0
dst.Scope_id = zone
copy(dst.Addr[:], ipv6[:])
end.ClearSrc()
return nil
}
return errors.New("Failed to recognize IP address format")
}
func send6(sock int, end *NativeEndpoint, buff []byte) error { func send6(sock int, end *NativeEndpoint, buff []byte) error {
// construct message header // construct message header

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@ -260,9 +260,8 @@ func ipcSetOperation(device *Device, socket *bufio.ReadWriter) *IPCError {
err := func() error { err := func() error {
peer.mutex.Lock() peer.mutex.Lock()
defer peer.mutex.Unlock() defer peer.mutex.Unlock()
endpoint, err := CreateEndpoint(value)
endpoint := NewEndpoint() if err != nil {
if err := endpoint.SetDst(value); err != nil {
return err return err
} }
peer.endpoint = endpoint peer.endpoint = endpoint