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simplify udp handling

pull/40/head
V2Ray 2015-10-02 15:32:26 +02:00
parent df963c99ca
commit 76563cb7c7
8 changed files with 48 additions and 148 deletions
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54
common/net/packet.go
View File

@ -6,54 +6,28 @@ type Packet interface {
MoreChunks() bool
}
func NewTCPPacket(dest Destination) *TCPPacket {
return &TCPPacket{
basePacket: basePacket{destination: dest},
func NewPacket(dest Destination, firstChunk []byte, moreChunks bool) Packet {
return &packetImpl{
dest: dest,
data: firstChunk,
moreData: moreChunks,
}
}
func NewUDPPacket(dest Destination, data []byte, token uint16) *UDPPacket {
return &UDPPacket{
basePacket: basePacket{destination: dest},
data: data,
token: token,
}
type packetImpl struct {
dest Destination
data []byte
moreData bool
}
type basePacket struct {
destination Destination
func (packet *packetImpl) Destination() Destination {
return packet.dest
}
func (base basePacket) Destination() Destination {
return base.destination
}
type TCPPacket struct {
basePacket
}
func (packet *TCPPacket) Chunk() []byte {
return nil
}
func (packet *TCPPacket) MoreChunks() bool {
return true
}
type UDPPacket struct {
basePacket
data []byte
token uint16
}
func (packet *UDPPacket) Token() uint16 {
return packet.token
}
func (packet *UDPPacket) Chunk() []byte {
func (packet *packetImpl) Chunk() []byte {
return packet.data
}
func (packet *UDPPacket) MoreChunks() bool {
return false
func (packet *packetImpl) MoreChunks() bool {
return packet.moreData
}

4
point.go
View File

@ -96,7 +96,3 @@ func (p *Point) DispatchToOutbound(packet v2net.Packet) InboundRay {
_ = och.Start(ray)
return ray
}
func (p *Point) DispatchToInbound(packet v2net.Packet) {
return
}

17
proxy/freedom/freedom.go
View File

@ -29,6 +29,12 @@ func (vconn *FreedomConnection) Start(ray core.OutboundRay) error {
return log.Error("Freedom: Failed to open connection: %s : %v", vconn.packet.Destination().String(), err)
}
input := ray.OutboundInput()
output := ray.OutboundOutput()
var readMutex, writeMutex sync.Mutex
readMutex.Lock()
writeMutex.Lock()
if chunk := vconn.packet.Chunk(); chunk != nil {
conn.Write(chunk)
}
@ -37,16 +43,11 @@ func (vconn *FreedomConnection) Start(ray core.OutboundRay) error {
if ray != nil {
close(ray.OutboundOutput())
}
return nil
writeMutex.Unlock()
} else {
go dumpInput(conn, input, &writeMutex)
}
input := ray.OutboundInput()
output := ray.OutboundOutput()
var readMutex, writeMutex sync.Mutex
readMutex.Lock()
writeMutex.Lock()
go dumpInput(conn, input, &writeMutex)
go dumpOutput(conn, output, &readMutex)
go func() {

2
proxy/socks/socks.go
View File

@ -168,7 +168,7 @@ func (server *SocksServer) HandleConnection(connection net.Conn) error {
dest = request.Destination()
}
ray := server.vPoint.DispatchToOutbound(v2net.NewTCPPacket(dest))
ray := server.vPoint.DispatchToOutbound(v2net.NewPacket(dest, nil, true))
input := ray.InboundInput()
output := ray.InboundOutput()
var readFinish, writeFinish sync.Mutex

84
proxy/socks/udp.go
View File

@ -1,12 +1,8 @@
package socks
import (
"math"
"math/rand"
"net"
"sync"
"github.com/v2ray/v2ray-core/common/collect"
"github.com/v2ray/v2ray-core/common/log"
v2net "github.com/v2ray/v2ray-core/common/net"
"github.com/v2ray/v2ray-core/proxy/socks/protocol"
@ -16,66 +12,7 @@ const (
bufferSize = 2 * 1024
)
type portMap struct {
access sync.Mutex
data map[uint16]*net.UDPAddr
removedPorts *collect.TimedQueue
}
func newPortMap() *portMap {
m := &portMap{
access: sync.Mutex{},
data: make(map[uint16]*net.UDPAddr),
removedPorts: collect.NewTimedQueue(1),
}
go m.removePorts(m.removedPorts.RemovedEntries())
return m
}
func (m *portMap) assignAddressToken(addr *net.UDPAddr) uint16 {
for {
token := uint16(rand.Intn(math.MaxUint16))
if _, used := m.data[token]; !used {
m.access.Lock()
if _, used = m.data[token]; !used {
m.data[token] = addr
m.access.Unlock()
return token
}
m.access.Unlock()
}
}
}
func (m *portMap) removePorts(removedPorts <-chan interface{}) {
for {
rawToken := <-removedPorts
m.access.Lock()
delete(m.data, rawToken.(uint16))
m.access.Unlock()
}
}
func (m *portMap) popPort(token uint16) *net.UDPAddr {
m.access.Lock()
defer m.access.Unlock()
addr, exists := m.data[token]
if !exists {
return nil
}
delete(m.data, token)
return addr
}
var (
ports *portMap
udpConn *net.UDPConn
)
func (server *SocksServer) ListenUDP(port uint16) error {
ports = newPortMap()
addr := &net.UDPAddr{
IP: net.IP{0, 0, 0, 0},
Port: int(port),
@ -88,7 +25,6 @@ func (server *SocksServer) ListenUDP(port uint16) error {
}
go server.AcceptPackets(conn)
udpConn = conn
return nil
}
@ -110,20 +46,16 @@ func (server *SocksServer) AcceptPackets(conn *net.UDPConn) error {
continue
}
token := ports.assignAddressToken(addr)
udpPacket := v2net.NewUDPPacket(request.Destination(), request.Data, token)
server.vPoint.DispatchToOutbound(udpPacket)
udpPacket := v2net.NewPacket(request.Destination(), request.Data, false)
go server.handlePacket(conn, udpPacket, addr)
}
}
func (server *SocksServer) Dispatch(packet v2net.Packet) {
if udpPacket, ok := packet.(*v2net.UDPPacket); ok {
token := udpPacket.Token()
addr := ports.popPort(token)
if udpConn != nil {
udpConn.WriteToUDP(udpPacket.Chunk(), addr)
}
func (server *SocksServer) handlePacket(conn *net.UDPConn, packet v2net.Packet, clientAddr *net.UDPAddr) {
ray := server.vPoint.DispatchToOutbound(packet)
close(ray.InboundInput())
if data, ok := <-ray.InboundOutput(); ok {
conn.WriteToUDP(data, clientAddr)
}
// We don't expect TCP Packets here
}

2
proxy/vmess/vmess_test.go
View File

@ -69,7 +69,7 @@ func TestVMessInAndOut(t *testing.T) {
assert.Error(err).IsNil()
dest := v2net.NewTCPDestination(v2net.IPAddress([]byte{1, 2, 3, 4}, 80))
ich.Communicate(v2net.NewTCPPacket(dest))
ich.Communicate(v2net.NewPacket(dest, nil, true))
assert.Bytes([]byte(data2Send)).Equals(och.Data2Send.Bytes())
assert.Bytes(ich.DataReturned.Bytes()).Equals(och.Data2Return)
}

2
proxy/vmess/vmessin.go
View File

@ -72,7 +72,7 @@ func (handler *VMessInboundHandler) HandleConnection(connection net.Conn) error
}
log.Debug("VMessIn: Received request for %s", request.Address.String())
ray := handler.vPoint.DispatchToOutbound(v2net.NewTCPPacket(request.Destination()))
ray := handler.vPoint.DispatchToOutbound(v2net.NewPacket(request.Destination(), nil, true))
input := ray.InboundInput()
output := ray.InboundOutput()
var readFinish, writeFinish sync.Mutex

31
proxy/vmess/vmessout.go
View File

@ -97,24 +97,13 @@ func startCommunicate(request *protocol.VMessRequest, dest v2net.Destination, ra
defer conn.Close()
if chunk := firstPacket.Chunk(); chunk != nil {
conn.Write(chunk)
}
if !firstPacket.MoreChunks() {
if ray != nil {
close(ray.OutboundOutput())
}
return nil
}
input := ray.OutboundInput()
output := ray.OutboundOutput()
var requestFinish, responseFinish sync.Mutex
requestFinish.Lock()
responseFinish.Lock()
go handleRequest(conn, request, input, &requestFinish)
go handleRequest(conn, request, firstPacket, input, &requestFinish)
go handleResponse(conn, request, output, &responseFinish)
requestFinish.Lock()
@ -123,7 +112,7 @@ func startCommunicate(request *protocol.VMessRequest, dest v2net.Destination, ra
return nil
}
func handleRequest(conn *net.TCPConn, request *protocol.VMessRequest, input <-chan []byte, finish *sync.Mutex) {
func handleRequest(conn *net.TCPConn, request *protocol.VMessRequest, firstPacket v2net.Packet, input <-chan []byte, finish *sync.Mutex) {
defer finish.Unlock()
encryptRequestWriter, err := v2io.NewAesEncryptWriter(request.RequestKey[:], request.RequestIV[:], conn)
if err != nil {
@ -139,17 +128,25 @@ func handleRequest(conn *net.TCPConn, request *protocol.VMessRequest, input <-ch
}
// Send first packet of payload together with request, in favor of small requests.
payload, open := <-input
if open {
encryptRequestWriter.Crypt(payload)
buffer = append(buffer, payload...)
firstChunk := firstPacket.Chunk()
moreChunks := firstPacket.MoreChunks()
if firstChunk == nil && moreChunks {
firstChunk, moreChunks = <-input
}
if firstChunk != nil {
encryptRequestWriter.Crypt(firstChunk)
buffer = append(buffer, firstChunk...)
_, err = conn.Write(buffer)
if err != nil {
log.Error("VMessOut: Failed to write VMess request: %v", err)
return
}
}
if moreChunks {
v2net.ChanToWriter(encryptRequestWriter, input)
}
return