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ACL for TCP TProxy

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This commit is contained in:
Toby 2021-04-24 15:36:19 -07:00
parent 787ed14c4d
commit 70fd2ffc0d
6 changed files with 100 additions and 36 deletions
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5
cmd/client.go
View File

@ -243,9 +243,10 @@ func client(config *clientConfig) {
if len(config.TCPTProxy.Listen) > 0 {
go func() {
rl, err := tproxy.NewTCPTProxy(client, config.TCPTProxy.Listen,
time.Duration(config.TCPTProxy.Timeout)*time.Second,
func(addr, reqAddr net.Addr) {
time.Duration(config.TCPTProxy.Timeout)*time.Second, aclEngine,
func(addr, reqAddr net.Addr, action acl.Action, arg string) {
logrus.WithFields(logrus.Fields{
"action": actionToString(action, arg),
"src": addr.String(),
"dst": reqAddr.String(),
}).Debug("TCP TProxy request")

16
pkg/core/client.go
View File

@ -195,7 +195,7 @@ func (c *Client) openStreamWithReconnect() (quic.Session, quic.Stream, error) {
}
func (c *Client) DialTCP(addr string) (net.Conn, error) {
host, port, err := splitHostPort(addr)
host, port, err := utils.SplitHostPort(addr)
if err != nil {
return nil, err
}
@ -366,7 +366,7 @@ func (c *quicPktConn) ReadFrom() ([]byte, string, error) {
}
func (c *quicPktConn) WriteTo(p []byte, addr string) error {
host, port, err := splitHostPort(addr)
host, port, err := utils.SplitHostPort(addr)
if err != nil {
return err
}
@ -384,15 +384,3 @@ func (c *quicPktConn) Close() error {
c.CloseFunc()
return c.Stream.Close()
}
func splitHostPort(hostport string) (string, uint16, error) {
host, port, err := net.SplitHostPort(hostport)
if err != nil {
return "", 0, err
}
portUint, err := strconv.ParseUint(port, 10, 16)
if err != nil {
return "", 0, err
}
return host, uint16(portUint), err
}

11
pkg/http/server.go
View File

@ -3,6 +3,7 @@ package http
import (
"errors"
"fmt"
"github.com/tobyxdd/hysteria/pkg/utils"
"net"
"net/http"
"strconv"
@ -24,11 +25,7 @@ func NewProxyHTTPServer(hyClient *core.Client, idleTimeout time.Duration, aclEng
proxy.Tr = &http.Transport{
Dial: func(network, addr string) (net.Conn, error) {
// Parse addr string
host, port, err := net.SplitHostPort(addr)
if err != nil {
return nil, err
}
portUint, err := strconv.ParseUint(port, 10, 16)
host, port, err := utils.SplitHostPort(addr)
if err != nil {
return nil, err
}
@ -49,7 +46,7 @@ func NewProxyHTTPServer(hyClient *core.Client, idleTimeout time.Duration, aclEng
}
return net.DialTCP(network, nil, &net.TCPAddr{
IP: ipAddr.IP,
Port: int(portUint),
Port: int(port),
Zone: ipAddr.Zone,
})
case acl.ActionProxy:
@ -57,7 +54,7 @@ func NewProxyHTTPServer(hyClient *core.Client, idleTimeout time.Duration, aclEng
case acl.ActionBlock:
return nil, errors.New("blocked by ACL")
case acl.ActionHijack:
return net.Dial(network, net.JoinHostPort(arg, port))
return net.Dial(network, net.JoinHostPort(arg, strconv.Itoa(int(port))))
default:
return nil, fmt.Errorf("unknown action %d", action)
}

74
pkg/tproxy/tcp_linux.go
View File

@ -1,10 +1,14 @@
package tproxy
import (
"errors"
"fmt"
"github.com/LiamHaworth/go-tproxy"
"github.com/tobyxdd/hysteria/pkg/acl"
"github.com/tobyxdd/hysteria/pkg/core"
"github.com/tobyxdd/hysteria/pkg/utils"
"net"
"strconv"
"time"
)
@ -12,13 +16,15 @@ type TCPTProxy struct {
HyClient *core.Client
ListenAddr *net.TCPAddr
Timeout time.Duration
ACLEngine *acl.Engine
ConnFunc func(addr, reqAddr net.Addr)
ConnFunc func(addr, reqAddr net.Addr, action acl.Action, arg string)
ErrorFunc func(addr, reqAddr net.Addr, err error)
}
func NewTCPTProxy(hyClient *core.Client, listen string, timeout time.Duration,
connFunc func(addr, reqAddr net.Addr), errorFunc func(addr, reqAddr net.Addr, err error)) (*TCPTProxy, error) {
func NewTCPTProxy(hyClient *core.Client, listen string, timeout time.Duration, aclEngine *acl.Engine,
connFunc func(addr, reqAddr net.Addr, action acl.Action, arg string),
errorFunc func(addr, reqAddr net.Addr, err error)) (*TCPTProxy, error) {
tAddr, err := net.ResolveTCPAddr("tcp", listen)
if err != nil {
return nil, err
@ -27,6 +33,7 @@ func NewTCPTProxy(hyClient *core.Client, listen string, timeout time.Duration,
HyClient: hyClient,
ListenAddr: tAddr,
Timeout: timeout,
ACLEngine: aclEngine,
ConnFunc: connFunc,
ErrorFunc: errorFunc,
}
@ -49,15 +56,66 @@ func (r *TCPTProxy) ListenAndServe() error {
// Under TPROXY mode, we are effectively acting as the remote server
// So our LocalAddr is actually the target to which the user is trying to connect
// and our RemoteAddr is the local address where the user initiates the connection
r.ConnFunc(c.RemoteAddr(), c.LocalAddr())
rc, err := r.HyClient.DialTCP(c.LocalAddr().String())
host, port, err := utils.SplitHostPort(c.LocalAddr().String())
if err != nil {
r.ErrorFunc(c.RemoteAddr(), c.LocalAddr(), err)
return
}
action, arg := acl.ActionProxy, ""
var ipAddr *net.IPAddr
var resErr error
if r.ACLEngine != nil {
action, arg, ipAddr, resErr = r.ACLEngine.ResolveAndMatch(host)
// Doesn't always matter if the resolution fails, as we may send it through HyClient
}
r.ConnFunc(c.RemoteAddr(), c.LocalAddr(), action, arg)
var closeErr error
defer func() {
r.ErrorFunc(c.RemoteAddr(), c.LocalAddr(), closeErr)
}()
// Handle according to the action
switch action {
case acl.ActionDirect:
if resErr != nil {
closeErr = resErr
return
}
rc, err := net.DialTCP("tcp", nil, &net.TCPAddr{
IP: ipAddr.IP,
Port: int(port),
Zone: ipAddr.Zone,
})
if err != nil {
closeErr = err
return
}
defer rc.Close()
err = utils.PipePairWithTimeout(c, rc, r.Timeout)
r.ErrorFunc(c.RemoteAddr(), c.LocalAddr(), err)
closeErr = utils.PipePairWithTimeout(c, rc, r.Timeout)
return
case acl.ActionProxy:
rc, err := r.HyClient.DialTCP(c.LocalAddr().String())
if err != nil {
closeErr = err
return
}
defer rc.Close()
closeErr = utils.PipePairWithTimeout(c, rc, r.Timeout)
return
case acl.ActionBlock:
closeErr = errors.New("blocked in ACL")
return
case acl.ActionHijack:
rc, err := net.Dial("tcp", net.JoinHostPort(arg, strconv.Itoa(int(port))))
if err != nil {
closeErr = err
return
}
defer rc.Close()
closeErr = utils.PipePairWithTimeout(c, rc, r.Timeout)
return
default:
closeErr = fmt.Errorf("unknown action %d", action)
return
}
}()
}
}

6
pkg/tproxy/tcp_stub.go
View File

@ -4,6 +4,7 @@ package tproxy
import (
"errors"
"github.com/tobyxdd/hysteria/pkg/acl"
"github.com/tobyxdd/hysteria/pkg/core"
"net"
"time"
@ -11,8 +12,9 @@ import (
type TCPTProxy struct{}
func NewTCPTProxy(hyClient *core.Client, listen string, timeout time.Duration,
connFunc func(addr, reqAddr net.Addr), errorFunc func(addr, reqAddr net.Addr, err error)) (*TCPTProxy, error) {
func NewTCPTProxy(hyClient *core.Client, listen string, timeout time.Duration, aclEngine *acl.Engine,
connFunc func(addr, reqAddr net.Addr, action acl.Action, arg string),
errorFunc func(addr, reqAddr net.Addr, err error)) (*TCPTProxy, error) {
return nil, errors.New("not supported on the current system")
}

18
pkg/utils/misc.go Normal file
View File

@ -0,0 +1,18 @@
package utils
import (
"net"
"strconv"
)
func SplitHostPort(hostport string) (string, uint16, error) {
host, port, err := net.SplitHostPort(hostport)
if err != nil {
return "", 0, err
}
portUint, err := strconv.ParseUint(port, 10, 16)
if err != nil {
return "", 0, err
}
return host, uint16(portUint), err
}