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Fix fallbacks xver when original address is not TCP address (#182)

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Co-authored-by: RPRX <63339210+rprx@users.noreply.github.com>
This commit is contained in:
Bohan Yang 2021-01-22 11:26:57 +08:00 • committed by GitHub
parent 5aa053a65f
commit 5bc1bf30ae
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GPG key ID: 4AEE18F83AFDEB23
4 changed files with 65 additions and 40 deletions
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50
proxy/vless/inbound/inbound.go
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@ -335,39 +335,51 @@ func (h *Handler) Process(ctx context.Context, network net.Network, connection i
postRequest := func() error {
defer timer.SetTimeout(sessionPolicy.Timeouts.DownlinkOnly)
if fb.Xver != 0 {
remoteAddr, remotePort, err := net.SplitHostPort(connection.RemoteAddr().String())
if err != nil {
return err
}
localAddr, localPort, err := net.SplitHostPort(connection.LocalAddr().String())
if err != nil {
return err
}
ipv4 := true
for i := 0; i < len(remoteAddr); i++ {
if remoteAddr[i] == ':' {
ipv4 = false
break
var remoteAddr, remotePort, localAddr, localPort string
ipType, network := 0, connection.RemoteAddr().Network()
if len(network) >= 3 && network[:3] == "tcp" {
var err error
remoteAddr, remotePort, err = net.SplitHostPort(connection.RemoteAddr().String())
if err != nil {
return err
}
localAddr, localPort, err = net.SplitHostPort(connection.LocalAddr().String())
if err != nil {
return err
}
ipType = 4
for i := 0; i < len(remoteAddr); i++ {
if remoteAddr[i] == ':' {
ipType = 6
break
}
}
}
pro := buf.New()
defer pro.Release()
switch fb.Xver {
case 1:
if ipv4 {
if ipType == 0 {
pro.Write([]byte("PROXY UNKNOWN\r\n"))
break
}
if ipType == 4 {
pro.Write([]byte("PROXY TCP4 " + remoteAddr + " " + localAddr + " " + remotePort + " " + localPort + "\r\n"))
} else {
pro.Write([]byte("PROXY TCP6 " + remoteAddr + " " + localAddr + " " + remotePort + " " + localPort + "\r\n"))
}
case 2:
pro.Write([]byte("\x0D\x0A\x0D\x0A\x00\x0D\x0A\x51\x55\x49\x54\x0A\x21")) // signature + v2 + PROXY
if ipv4 {
pro.Write([]byte("\x11\x00\x0C")) // AF_INET + STREAM + 12 bytes
pro.Write([]byte("\x0D\x0A\x0D\x0A\x00\x0D\x0A\x51\x55\x49\x54\x0A")) // signature
if ipType == 0 {
pro.Write([]byte("\x20\x00\x00\x00")) // v2 + LOCAL + UNSPEC + UNSPEC + 0 bytes
break
}
if ipType == 4 {
pro.Write([]byte("\x21\x11\x00\x0C")) // v2 + PROXY + AF_INET + STREAM + 12 bytes
pro.Write(net.ParseIP(remoteAddr).To4())
pro.Write(net.ParseIP(localAddr).To4())
} else {
pro.Write([]byte("\x21\x00\x24")) // AF_INET6 + STREAM + 36 bytes
pro.Write([]byte("\x21\x21\x00\x24")) // v2 + PROXY + AF_INET6 + STREAM + 36 bytes
pro.Write(net.ParseIP(remoteAddr).To16())
pro.Write(net.ParseIP(localAddr).To16())
}