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Copy pathcommon_test.go
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260 lines (217 loc) · 4.81 KB
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package gost
import (
"bufio"
"bytes"
"crypto/tls"
"errors"
"fmt"
"io"
"io/ioutil"
"net"
"net/http"
"net/url"
"sync"
"time"
"github.com/go-log/log"
)
func init() {
SetLogger(&NopLogger{})
// SetLogger(&LogLogger{})
Debug = true
DialTimeout = 1000 * time.Millisecond
HandshakeTimeout = 1000 * time.Millisecond
ConnectTimeout = 1000 * time.Millisecond
cert, err := GenCertificate()
if err != nil {
panic(err)
}
DefaultTLSConfig = &tls.Config{
Certificates: []tls.Certificate{cert},
}
}
var (
httpTestHandler = http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
data, _ := ioutil.ReadAll(r.Body)
if len(data) == 0 {
data = []byte("Hello World!")
}
io.Copy(w, bytes.NewReader(data))
})
udpTestHandler = udpHandlerFunc(func(w io.Writer, r *udpRequest) {
io.Copy(w, r.Body)
})
)
// proxyConn obtains a connection to the proxy server.
func proxyConn(client *Client, server *Server) (net.Conn, error) {
conn, err := client.Dial(server.Addr().String())
if err != nil {
return nil, err
}
cc, err := client.Handshake(conn, AddrHandshakeOption(server.Addr().String()))
if err != nil {
conn.Close()
return nil, err
}
return cc, nil
}
// httpRoundtrip does a HTTP request-response roundtrip, and checks the data received.
func httpRoundtrip(conn net.Conn, targetURL string, data []byte) (err error) {
req, err := http.NewRequest(
http.MethodGet,
targetURL,
bytes.NewReader(data),
)
if err != nil {
return
}
if err = req.Write(conn); err != nil {
return
}
resp, err := http.ReadResponse(bufio.NewReader(conn), req)
if err != nil {
return
}
defer resp.Body.Close()
if resp.StatusCode != http.StatusOK {
return errors.New(resp.Status)
}
recv, err := ioutil.ReadAll(resp.Body)
if err != nil {
return
}
if !bytes.Equal(data, recv) {
return fmt.Errorf("data not equal")
}
return
}
func udpRoundtrip(logger log.Logger, client *Client, server *Server, host string, data []byte) (err error) {
conn, err := proxyConn(client, server)
if err != nil {
return
}
defer conn.Close()
conn, err = client.Connect(conn, host)
if err != nil {
return
}
conn.SetDeadline(time.Now().Add(1 * time.Second))
defer conn.SetDeadline(time.Time{})
if _, err = conn.Write(data); err != nil {
logger.Logf("write to %s via %s: %s", host, server.Addr(), err)
return
}
recv := make([]byte, len(data))
if _, err = conn.Read(recv); err != nil {
logger.Logf("read from %s via %s: %s", host, server.Addr(), err)
return
}
if !bytes.Equal(data, recv) {
return fmt.Errorf("data not equal")
}
return
}
func proxyRoundtrip(client *Client, server *Server, targetURL string, data []byte) (err error) {
conn, err := proxyConn(client, server)
if err != nil {
return err
}
defer conn.Close()
u, err := url.Parse(targetURL)
if err != nil {
return
}
conn, err = client.Connect(conn, u.Host)
if err != nil {
return
}
conn.SetDeadline(time.Now().Add(1000 * time.Millisecond))
defer conn.SetDeadline(time.Time{})
return httpRoundtrip(conn, targetURL, data)
}
type udpRequest struct {
Body io.Reader
RemoteAddr string
}
type udpResponseWriter struct {
conn net.PacketConn
addr net.Addr
}
func (w *udpResponseWriter) Write(p []byte) (int, error) {
return w.conn.WriteTo(p, w.addr)
}
type udpHandlerFunc func(w io.Writer, r *udpRequest)
// udpTestServer is a UDP server for test.
type udpTestServer struct {
ln net.PacketConn
handler udpHandlerFunc
wg sync.WaitGroup
mu sync.Mutex // guards closed and conns
closed bool
startChan chan struct{}
exitChan chan struct{}
}
func newUDPTestServer(handler udpHandlerFunc) *udpTestServer {
laddr, _ := net.ResolveUDPAddr("udp", "127.0.0.1:0")
ln, err := net.ListenUDP("udp", laddr)
if err != nil {
panic(fmt.Sprintf("udptest: failed to listen on a port: %v", err))
}
return &udpTestServer{
ln: ln,
handler: handler,
startChan: make(chan struct{}),
exitChan: make(chan struct{}),
}
}
func (s *udpTestServer) Start() {
go s.serve()
<-s.startChan
}
func (s *udpTestServer) serve() {
select {
case <-s.startChan:
return
default:
close(s.startChan)
}
for {
data := make([]byte, 32*1024)
n, raddr, err := s.ln.ReadFrom(data)
if err != nil {
break
}
if s.handler != nil {
s.wg.Add(1)
go func() {
defer s.wg.Done()
w := &udpResponseWriter{
conn: s.ln,
addr: raddr,
}
r := &udpRequest{
Body: bytes.NewReader(data[:n]),
RemoteAddr: raddr.String(),
}
s.handler(w, r)
}()
}
}
// signal the listener has been exited.
close(s.exitChan)
}
func (s *udpTestServer) Addr() string {
return s.ln.LocalAddr().String()
}
func (s *udpTestServer) Close() error {
s.mu.Lock()
if s.closed {
s.mu.Unlock()
return nil
}
err := s.ln.Close()
s.closed = true
s.mu.Unlock()
<-s.exitChan
s.wg.Wait()
return err
}