add rate limiter

2022-09-05 22:47:51 +08:00
parent e23da0f319
commit 4c2131ca6d
40 changed files with 1622 additions and 135 deletions
--- a/metrics/wrapper/conn.go
+++ b/metrics/wrapper/conn.go
@ -0,0 +1,272 @@
+package wrapper
+
+import (
+	"errors"
+	"io"
+	"net"
+	"syscall"
+
+	"github.com/go-gost/core/metrics"
+	xnet "github.com/go-gost/x/internal/net"
+	"github.com/go-gost/x/internal/net/udp"
+)
+
+var (
+	errUnsupport = errors.New("unsupported operation")
+)
+
+// serverConn is a server side Conn with metrics supported.
+type serverConn struct {
+	net.Conn
+	service string
+}
+
+func WrapConn(service string, c net.Conn) net.Conn {
+	if !metrics.IsEnabled() {
+		return c
+	}
+	return &serverConn{
+		service: service,
+		Conn:    c,
+	}
+}
+
+func (c *serverConn) Read(b []byte) (n int, err error) {
+	n, err = c.Conn.Read(b)
+	if counter := metrics.GetCounter(
+		metrics.MetricServiceTransferInputBytesCounter,
+		metrics.Labels{
+			"service": c.service,
+		}); counter != nil {
+		counter.Add(float64(n))
+	}
+	return
+}
+
+func (c *serverConn) Write(b []byte) (n int, err error) {
+	n, err = c.Conn.Write(b)
+	if counter := metrics.GetCounter(
+		metrics.MetricServiceTransferOutputBytesCounter,
+		metrics.Labels{
+			"service": c.service,
+		}); counter != nil {
+		counter.Add(float64(n))
+	}
+	return
+}
+
+func (c *serverConn) SyscallConn() (rc syscall.RawConn, err error) {
+	if sc, ok := c.Conn.(syscall.Conn); ok {
+		rc, err = sc.SyscallConn()
+		return
+	}
+	err = errUnsupport
+	return
+}
+
+type packetConn struct {
+	net.PacketConn
+	service string
+}
+
+func WrapPacketConn(service string, pc net.PacketConn) net.PacketConn {
+	if !metrics.IsEnabled() {
+		return pc
+	}
+	return &packetConn{
+		PacketConn: pc,
+		service:    service,
+	}
+}
+
+func (c *packetConn) ReadFrom(p []byte) (n int, addr net.Addr, err error) {
+	n, addr, err = c.PacketConn.ReadFrom(p)
+	if counter := metrics.GetCounter(
+		metrics.MetricServiceTransferInputBytesCounter,
+		metrics.Labels{
+			"service": c.service,
+		}); counter != nil {
+		counter.Add(float64(n))
+	}
+	return
+}
+
+func (c *packetConn) WriteTo(p []byte, addr net.Addr) (n int, err error) {
+	n, err = c.PacketConn.WriteTo(p, addr)
+	if counter := metrics.GetCounter(
+		metrics.MetricServiceTransferOutputBytesCounter,
+		metrics.Labels{
+			"service": c.service,
+		}); counter != nil {
+		counter.Add(float64(n))
+	}
+	return
+}
+
+type udpConn struct {
+	net.PacketConn
+	service string
+}
+
+func WrapUDPConn(service string, pc net.PacketConn) udp.Conn {
+	return &udpConn{
+		PacketConn: pc,
+		service:    service,
+	}
+}
+
+func (c *udpConn) RemoteAddr() net.Addr {
+	if nc, ok := c.PacketConn.(xnet.RemoteAddr); ok {
+		return nc.RemoteAddr()
+	}
+	return nil
+}
+
+func (c *udpConn) SetReadBuffer(n int) error {
+	if nc, ok := c.PacketConn.(xnet.SetBuffer); ok {
+		return nc.SetReadBuffer(n)
+	}
+	return errUnsupport
+}
+
+func (c *udpConn) SetWriteBuffer(n int) error {
+	if nc, ok := c.PacketConn.(xnet.SetBuffer); ok {
+		return nc.SetWriteBuffer(n)
+	}
+	return errUnsupport
+}
+
+func (c *udpConn) Read(b []byte) (n int, err error) {
+	if nc, ok := c.PacketConn.(io.Reader); ok {
+		n, err = nc.Read(b)
+		if counter := metrics.GetCounter(
+			metrics.MetricServiceTransferInputBytesCounter,
+			metrics.Labels{
+				"service": c.service,
+			}); counter != nil {
+			counter.Add(float64(n))
+		}
+		return
+	}
+	err = errUnsupport
+	return
+}
+
+func (c *udpConn) ReadFrom(p []byte) (n int, addr net.Addr, err error) {
+	n, addr, err = c.PacketConn.ReadFrom(p)
+	if counter := metrics.GetCounter(
+		metrics.MetricServiceTransferInputBytesCounter,
+		metrics.Labels{
+			"service": c.service,
+		}); counter != nil {
+		counter.Add(float64(n))
+	}
+	return
+}
+
+func (c *udpConn) ReadFromUDP(b []byte) (n int, addr *net.UDPAddr, err error) {
+	if nc, ok := c.PacketConn.(udp.ReadUDP); ok {
+		n, addr, err = nc.ReadFromUDP(b)
+		if counter := metrics.GetCounter(
+			metrics.MetricServiceTransferInputBytesCounter,
+			metrics.Labels{
+				"service": c.service,
+			}); counter != nil {
+			counter.Add(float64(n))
+		}
+		return
+	}
+	err = errUnsupport
+	return
+}
+
+func (c *udpConn) ReadMsgUDP(b, oob []byte) (n, oobn, flags int, addr *net.UDPAddr, err error) {
+	if nc, ok := c.PacketConn.(udp.ReadUDP); ok {
+		n, oobn, flags, addr, err = nc.ReadMsgUDP(b, oob)
+		if counter := metrics.GetCounter(
+			metrics.MetricServiceTransferInputBytesCounter,
+			metrics.Labels{
+				"service": c.service,
+			}); counter != nil {
+			counter.Add(float64(n))
+		}
+		return
+	}
+	err = errUnsupport
+	return
+}
+
+func (c *udpConn) Write(b []byte) (n int, err error) {
+	if nc, ok := c.PacketConn.(io.Writer); ok {
+		n, err = nc.Write(b)
+		if counter := metrics.GetCounter(
+			metrics.MetricServiceTransferOutputBytesCounter,
+			metrics.Labels{
+				"service": c.service,
+			}); counter != nil {
+			counter.Add(float64(n))
+		}
+		return
+	}
+	err = errUnsupport
+	return
+}
+
+func (c *udpConn) WriteTo(p []byte, addr net.Addr) (n int, err error) {
+	n, err = c.PacketConn.WriteTo(p, addr)
+	if counter := metrics.GetCounter(
+		metrics.MetricServiceTransferOutputBytesCounter,
+		metrics.Labels{
+			"service": c.service,
+		}); counter != nil {
+		counter.Add(float64(n))
+	}
+	return
+}
+
+func (c *udpConn) WriteToUDP(b []byte, addr *net.UDPAddr) (n int, err error) {
+	if nc, ok := c.PacketConn.(udp.WriteUDP); ok {
+		n, err = nc.WriteToUDP(b, addr)
+		if counter := metrics.GetCounter(
+			metrics.MetricServiceTransferOutputBytesCounter,
+			metrics.Labels{
+				"service": c.service,
+			}); counter != nil {
+			counter.Add(float64(n))
+		}
+		return
+	}
+	err = errUnsupport
+	return
+}
+
+func (c *udpConn) WriteMsgUDP(b, oob []byte, addr *net.UDPAddr) (n, oobn int, err error) {
+	if nc, ok := c.PacketConn.(udp.WriteUDP); ok {
+		n, oobn, err = nc.WriteMsgUDP(b, oob, addr)
+		if counter := metrics.GetCounter(
+			metrics.MetricServiceTransferOutputBytesCounter,
+			metrics.Labels{
+				"service": c.service,
+			}); counter != nil {
+			counter.Add(float64(n))
+		}
+		return
+	}
+	err = errUnsupport
+	return
+}
+
+func (c *udpConn) SyscallConn() (rc syscall.RawConn, err error) {
+	if nc, ok := c.PacketConn.(syscall.Conn); ok {
+		return nc.SyscallConn()
+	}
+	err = errUnsupport
+	return
+}
+
+func (c *udpConn) SetDSCP(n int) error {
+	if nc, ok := c.PacketConn.(xnet.SetDSCP); ok {
+		return nc.SetDSCP(n)
+	}
+	return nil
+}
--- a/metrics/wrapper/listener.go
+++ b/metrics/wrapper/listener.go
@ -0,0 +1,32 @@
+package wrapper
+
+import (
+	"net"
+
+	"github.com/go-gost/core/metrics"
+)
+
+type listener struct {
+	service string
+	net.Listener
+}
+
+func WrapListener(service string, ln net.Listener) net.Listener {
+	if !metrics.IsEnabled() {
+		return ln
+	}
+
+	return &listener{
+		service:  service,
+		Listener: ln,
+	}
+}
+
+func (ln *listener) Accept() (net.Conn, error) {
+	c, err := ln.Listener.Accept()
+	if err != nil {
+		return nil, err
+	}
+
+	return WrapConn(ln.service, c), nil
+}