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100 lines
2.1 KiB
100 lines
2.1 KiB
package freedom
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import (
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"net"
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"sync"
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"github.com/v2ray/v2ray-core/app"
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"github.com/v2ray/v2ray-core/common/log"
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v2net "github.com/v2ray/v2ray-core/common/net"
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"github.com/v2ray/v2ray-core/common/retry"
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"github.com/v2ray/v2ray-core/transport/dialer"
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"github.com/v2ray/v2ray-core/transport/ray"
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)
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type FreedomConnection struct {
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space app.Space
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}
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func (this *FreedomConnection) Dispatch(firstPacket v2net.Packet, ray ray.OutboundRay) error {
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log.Info("Freedom: Opening connection to ", firstPacket.Destination())
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var conn net.Conn
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err := retry.Timed(5, 100).On(func() error {
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rawConn, err := dialer.Dial(firstPacket.Destination())
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if err != nil {
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return err
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}
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conn = rawConn
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return nil
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})
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if err != nil {
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close(ray.OutboundOutput())
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log.Error("Freedom: Failed to open connection to ", firstPacket.Destination(), ": ", err)
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return err
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}
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defer conn.Close()
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input := ray.OutboundInput()
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output := ray.OutboundOutput()
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var readMutex, writeMutex sync.Mutex
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readMutex.Lock()
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writeMutex.Lock()
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if chunk := firstPacket.Chunk(); chunk != nil {
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conn.Write(chunk.Value)
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chunk.Release()
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}
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if !firstPacket.MoreChunks() {
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writeMutex.Unlock()
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} else {
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go func() {
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v2net.ChanToWriter(conn, input)
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writeMutex.Unlock()
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}()
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}
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go func() {
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defer readMutex.Unlock()
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defer close(output)
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response, err := v2net.ReadFrom(conn, nil)
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log.Info("Freedom receives ", response.Len(), " bytes from ", conn.RemoteAddr())
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if response.Len() > 0 {
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output <- response
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} else {
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response.Release()
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}
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if err != nil {
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return
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}
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if firstPacket.Destination().IsUDP() {
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return
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}
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v2net.ReaderToChan(output, conn)
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}()
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if this.space.HasDnsCache() {
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if firstPacket.Destination().Address().IsDomain() {
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domain := firstPacket.Destination().Address().Domain()
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addr := conn.RemoteAddr()
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switch typedAddr := addr.(type) {
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case *net.TCPAddr:
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this.space.DnsCache().Add(domain, typedAddr.IP)
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case *net.UDPAddr:
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this.space.DnsCache().Add(domain, typedAddr.IP)
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}
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}
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}
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writeMutex.Lock()
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if tcpConn, ok := conn.(*net.TCPConn); ok {
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tcpConn.CloseWrite()
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}
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readMutex.Lock()
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return nil
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}
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