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Optimize TPROXY Inbound UDP write back 

Enhanced stability.
This commit is contained in:
RPRX 2021-01-20 23:58:59 +00:00 committed by GitHub
parent ae98dc75cf
commit b60cf02603
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GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 30 additions and 43 deletions
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8
proxy/dokodemo/dokodemo.go
View File

@ -277,17 +277,17 @@ func (w *PacketWriter) WriteMultiBuffer(mb buf.MultiBuffer) error {
w.mark,
)
if err != nil {
newError(err).WriteToLog()
b.Release()
buf.ReleaseMulti(mb)
return err
continue
}
w.conns[*b.UDP] = conn
}
_, err = conn.WriteTo(b.Bytes(), w.back)
if err != nil {
conn.Close()
w.conns[*b.UDP] = nil
newError(err).WriteToLog()
w.conns[*b.UDP] = nil
conn.Close()
}
b.Release()
} else {

65
proxy/dokodemo/fakeudp_linux.go
View File

@ -12,68 +12,55 @@ import (
)
func FakeUDP(addr *net.UDPAddr, mark int) (net.PacketConn, error) {
var af int
var sockaddr syscall.Sockaddr
localSocketAddress, af, err := udpAddrToSocketAddr(addr)
if err != nil {
return nil, &net.OpError{Op: "fake", Err: fmt.Errorf("build local socket address: %s", err)}
if len(addr.IP) == 4 {
af = syscall.AF_INET
sockaddr = &syscall.SockaddrInet4{Port: addr.Port}
copy(sockaddr.(*syscall.SockaddrInet4).Addr[:], addr.IP)
} else {
af = syscall.AF_INET6
sockaddr = &syscall.SockaddrInet6{Port: addr.Port}
copy(sockaddr.(*syscall.SockaddrInet6).Addr[:], addr.IP)
}
fileDescriptor, err := syscall.Socket(af, syscall.SOCK_DGRAM, 0)
if err != nil {
var fd int
var err error
if fd, err = syscall.Socket(af, syscall.SOCK_DGRAM, 0); err != nil {
return nil, &net.OpError{Op: "fake", Err: fmt.Errorf("socket open: %s", err)}
}
if mark != 0 {
if err = syscall.SetsockoptInt(fileDescriptor, syscall.SOL_SOCKET, syscall.SO_MARK, mark); err != nil {
syscall.Close(fileDescriptor)
if err = syscall.SetsockoptInt(fd, syscall.SOL_SOCKET, syscall.SO_MARK, mark); err != nil {
syscall.Close(fd)
return nil, &net.OpError{Op: "fake", Err: fmt.Errorf("set socket option: SO_MARK: %s", err)}
}
}
if err = syscall.SetsockoptInt(fileDescriptor, syscall.SOL_SOCKET, syscall.SO_REUSEADDR, 1); err != nil {
syscall.Close(fileDescriptor)
return nil, &net.OpError{Op: "fake", Err: fmt.Errorf("set socket option: SO_REUSEADDR: %s", err)}
}
if err = syscall.SetsockoptInt(fileDescriptor, syscall.SOL_SOCKET, unix.SO_REUSEPORT, 1); err != nil {
syscall.Close(fileDescriptor)
return nil, &net.OpError{Op: "fake", Err: fmt.Errorf("set socket option: SO_REUSEPORT: %s", err)}
}
if err = syscall.SetsockoptInt(fileDescriptor, syscall.SOL_IP, syscall.IP_TRANSPARENT, 1); err != nil {
syscall.Close(fileDescriptor)
if err = syscall.SetsockoptInt(fd, syscall.SOL_IP, syscall.IP_TRANSPARENT, 1); err != nil {
syscall.Close(fd)
return nil, &net.OpError{Op: "fake", Err: fmt.Errorf("set socket option: IP_TRANSPARENT: %s", err)}
}
if err = syscall.Bind(fileDescriptor, localSocketAddress); err != nil {
syscall.Close(fileDescriptor)
syscall.SetsockoptInt(fd, syscall.SOL_SOCKET, syscall.SO_REUSEADDR, 1)
syscall.SetsockoptInt(fd, syscall.SOL_SOCKET, unix.SO_REUSEPORT, 1)
if err = syscall.Bind(fd, sockaddr); err != nil {
syscall.Close(fd)
return nil, &net.OpError{Op: "fake", Err: fmt.Errorf("socket bind: %s", err)}
}
fdFile := os.NewFile(uintptr(fileDescriptor), fmt.Sprintf("net-udp-fake-%s", addr.String()))
fdFile := os.NewFile(uintptr(fd), fmt.Sprintf("net-udp-fake-%s", addr.String()))
defer fdFile.Close()
packetConn, err := net.FilePacketConn(fdFile)
if err != nil {
syscall.Close(fileDescriptor)
syscall.Close(fd)
return nil, &net.OpError{Op: "fake", Err: fmt.Errorf("convert file descriptor to connection: %s", err)}
}
return packetConn, nil
}
func udpAddrToSocketAddr(addr *net.UDPAddr) (syscall.Sockaddr, int, error) {
switch {
case addr.IP.To4() != nil:
ip := [4]byte{}
copy(ip[:], addr.IP.To4())
return &syscall.SockaddrInet4{Addr: ip, Port: addr.Port}, syscall.AF_INET, nil
default:
ip := [16]byte{}
copy(ip[:], addr.IP.To16())
return &syscall.SockaddrInet6{Addr: ip, Port: addr.Port, ZoneId: 0}, syscall.AF_INET6, nil
}
}