commit 89cacc7f0f77d0f01d1a7fbd30a1d0fdd7d2e679 Author: dingjun Date: Mon Jul 6 18:58:30 2020 +0800 first commit diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..166a154 --- /dev/null +++ b/.gitignore @@ -0,0 +1,4 @@ +wstunnel +config.yaml +*.~ +.*~ \ No newline at end of file diff --git a/LICENSE b/LICENSE new file mode 100755 index 0000000..733c072 --- /dev/null +++ b/LICENSE @@ -0,0 +1,675 @@ + GNU GENERAL PUBLIC LICENSE + Version 3, 29 June 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The GNU General Public License is a free, copyleft license for +software and other kinds of works. + + The licenses for most software and other practical works are designed +to take away your freedom to share and change the works. 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If not, see . + +Also add information on how to contact you by electronic and paper mail. + + If the program does terminal interaction, make it output a short +notice like this when it starts in an interactive mode: + + {project} Copyright (C) {year} {fullname} + This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. + This is free software, and you are welcome to redistribute it + under certain conditions; type `show c' for details. + +The hypothetical commands `show w' and `show c' should show the appropriate +parts of the General Public License. Of course, your program's commands +might be different; for a GUI interface, you would use an "about box". + + You should also get your employer (if you work as a programmer) or school, +if any, to sign a "copyright disclaimer" for the program, if necessary. +For more information on this, and how to apply and follow the GNU GPL, see +. + + The GNU General Public License does not permit incorporating your program +into proprietary programs. If your program is a subroutine library, you +may consider it more useful to permit linking proprietary applications with +the library. If this is what you want to do, use the GNU Lesser General +Public License instead of this License. But first, please read +. + diff --git a/README.md b/README.md new file mode 100644 index 0000000..71f5518 --- /dev/null +++ b/README.md @@ -0,0 +1,8 @@ +wstunnel +======= + +two features: + +1. receive data through tcp and forward it through websocket connection + +2. receive data through websocket and forward it to upstream tcp port \ No newline at end of file diff --git a/conf.go b/conf.go new file mode 100644 index 0000000..9053624 --- /dev/null +++ b/conf.go @@ -0,0 +1,10 @@ +package main + +type proxyItem struct { + Listen string `yaml:"listen"` + Remote string `yaml:"remote"` +} + +type conf struct { + ProxyConfig []proxyItem `yaml:"proxy_config"` +} diff --git a/config.example.yaml b/config.example.yaml new file mode 100644 index 0000000..2ebea29 --- /dev/null +++ b/config.example.yaml @@ -0,0 +1,9 @@ + + +proxy_config: + - listen: ws://127.0.0.1:2901/p1 + remote: tcp://127.0.0.1:2903 + - listen: ws://127.0.0.1:2901/p2 + remote: tcp://127.0.0.1:2904 + - listen: tcp://127.0.0.1:2905 + remote: ws://127.0.0.1:2901/p1 \ No newline at end of file diff --git a/go.mod b/go.mod new file mode 100644 index 0000000..3220952 --- /dev/null +++ b/go.mod @@ -0,0 +1,9 @@ +module github.com/fangdingjun/wstunnel + +go 1.13 + +require ( + github.com/fangdingjun/go-log/v5 v5.0.0 + github.com/gorilla/websocket v1.4.2 + gopkg.in/yaml.v2 v2.3.0 +) diff --git a/go.sum b/go.sum new file mode 100644 index 0000000..8f2e9fc --- /dev/null +++ b/go.sum @@ -0,0 +1,9 @@ +github.com/fangdingjun/go-log/v5 v5.0.0 h1:vdh9Bk9C4ZFL6KoO6rII73zQIyaLf7hFdBvucO/ckiE= +github.com/fangdingjun/go-log/v5 v5.0.0/go.mod h1:V012Oxo0/pSbccX4OFSp9MJglXwNsZo2ByBBorr7zzM= +github.com/gorilla/websocket v1.4.2 h1:+/TMaTYc4QFitKJxsQ7Yye35DkWvkdLcvGKqM+x0Ufc= +github.com/gorilla/websocket v1.4.2/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE= +golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w= +golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY= +gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0= +gopkg.in/yaml.v2 v2.3.0 h1:clyUAQHOM3G0M3f5vQj7LuJrETvjVot3Z5el9nffUtU= +gopkg.in/yaml.v2 v2.3.0/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI= diff --git a/main.go b/main.go new file mode 100644 index 0000000..e7058cb --- /dev/null +++ b/main.go @@ -0,0 +1,92 @@ +package main + +import ( + "flag" + "io/ioutil" + "net/url" + "os" + "os/signal" + "syscall" + + log "github.com/fangdingjun/go-log/v5" + "gopkg.in/yaml.v2" +) + +func makeServers(cfg conf) { + var wsservers = []wsServer{} + var tcpservers = []tcpServer{} + + for _, c := range cfg.ProxyConfig { + u, err := url.Parse(c.Listen) + if err != nil { + log.Fatalf("parse %s, error %s", c.Listen, err) + } + switch u.Scheme { + + case "ws": + exists := false + for i := 0; i < len(wsservers); i++ { + if wsservers[i].addr == u.Host { + exists = true + wsservers[i].rule = append(wsservers[i].rule, forwardRule{u.Path, c.Remote}) + break + } + } + if !exists { + wsservers = append(wsservers, wsServer{u.Host, []forwardRule{{u.Path, c.Remote}}}) + } + + case "tcp": + tcpservers = append(tcpservers, tcpServer{u.Host, c.Remote}) + default: + log.Fatalf("unsupported scheme %s", u.Scheme) + } + } + + for _, srv := range wsservers { + go srv.run() + } + for _, srv := range tcpservers { + go srv.run() + } +} + +func main() { + var cfgfile string + var logfile string + var loglevel string + flag.StringVar(&cfgfile, "c", "config.yaml", "config file") + flag.StringVar(&logfile, "log_file", "", "log file") + flag.StringVar(&loglevel, "log_level", "INFO", "log level") + flag.Parse() + + data, err := ioutil.ReadFile(cfgfile) + if err != nil { + log.Fatal(err) + } + var cfg conf + if err := yaml.Unmarshal(data, &cfg); err != nil { + log.Fatal(err) + } + + if logfile != "" { + log.Default.Out = &log.FixedSizeFileWriter{ + MaxCount: 4, + Name: logfile, + MaxSize: 10 * 1024 * 1024, + } + } + + if lv, err := log.ParseLevel(loglevel); err == nil { + log.Default.Level = lv + } + + makeServers(cfg) + + ch := make(chan os.Signal, 2) + signal.Notify(ch, syscall.SIGINT, syscall.SIGTERM) + select { + case s := <-ch: + log.Printf("received signal %s, exit.", s) + } +} diff --git a/server.go b/server.go new file mode 100644 index 0000000..4f45531 --- /dev/null +++ b/server.go @@ -0,0 +1,233 @@ +package main + +import ( + "io" + "net" + "net/http" + "net/url" + + log "github.com/fangdingjun/go-log/v5" + "github.com/gorilla/websocket" +) + +type forwardRule struct { + local string + remote string +} + +type wsServer struct { + addr string + rule []forwardRule +} + +type tcpServer struct { + addr string + remote string +} + +func (wss *wsServer) run() { + if err := http.ListenAndServe(wss.addr, wss); err != nil { + log.Errorln(err) + } +} + +var upgrader = websocket.Upgrader{ + ReadBufferSize: 1024, + WriteBufferSize: 1024, +} +var dialer = &websocket.Dialer{} + +func forwardWS2WS(conn, conn1 *websocket.Conn) { + ch := make(chan struct{}, 2) + go func() { + for { + t, data, err := conn.ReadMessage() + if err != nil { + log.Errorln(err) + break + } + err = conn1.WriteMessage(t, data) + if err != nil { + log.Errorln(err) + break + } + } + ch <- struct{}{} + }() + go func() { + for { + t, data, err := conn1.ReadMessage() + if err != nil { + log.Errorln(err) + break + } + err = conn.WriteMessage(t, data) + if err != nil { + log.Errorln(err) + break + } + } + ch <- struct{}{} + + }() + <-ch +} + +func forwardWS2TCP(conn1 *websocket.Conn, conn2 net.Conn) { + + ch := make(chan struct{}, 2) + go func() { + for { + _, data, err := conn1.ReadMessage() + if err != nil { + log.Errorln(err) + break + } + _, err = conn2.Write(data) + if err != nil { + log.Errorln(err) + break + } + } + ch <- struct{}{} + }() + go func() { + buf := make([]byte, 1024) + for { + n, err := conn2.Read(buf) + if err != nil { + log.Errorln(err) + break + } + err = conn1.WriteMessage(websocket.BinaryMessage, buf[:n]) + if err != nil { + log.Errorln(err) + break + } + } + ch <- struct{}{} + }() + <-ch +} + +func forwardTCP2TCP(c1, c2 net.Conn) { + ch := make(chan struct{}, 2) + go func() { + _, err := io.Copy(c1, c2) + if err != nil { + log.Errorln(err) + } + ch <- struct{}{} + }() + go func() { + _, err := io.Copy(c2, c1) + if err != nil { + log.Errorln(err) + } + ch <- struct{}{} + }() + <-ch +} + +func (wss *wsServer) ServeHTTP(w http.ResponseWriter, r *http.Request) { + p := r.URL.Path + remote := "" + for _, ru := range wss.rule { + if ru.local == p { + remote = ru.remote + } + } + + if remote == "" { + http.Error(w, "not found", http.StatusNotFound) + return + } + conn, err := upgrader.Upgrade(w, r, nil) + if err != nil { + log.Errorln(err) + http.Error(w, "bad request", http.StatusBadRequest) + return + } + defer conn.Close() + + u, _ := url.Parse(remote) + + if u.Scheme == "ws" || u.Scheme == "wss" { + conn1, resp, err := dialer.Dial(remote, nil) + if err != nil { + log.Errorln(err) + return + } + resp.Body.Close() + defer conn1.Close() + if resp.StatusCode != http.StatusSwitchingProtocols { + log.Errorf("dial remote ws %d", resp.StatusCode) + return + } + forwardWS2WS(conn, conn1) + return + } + + if u.Scheme == "tcp" { + conn1, err := net.Dial("tcp", u.Host) + if err != nil { + log.Errorln(err) + return + } + defer conn1.Close() + forwardWS2TCP(conn, conn1) + return + } + log.Errorf("unsupported scheme %s", u.Scheme) +} + +func (srv *tcpServer) run() { + l, err := net.Listen("tcp", srv.addr) + if err != nil { + log.Errorln(err) + return + } + defer l.Close() + for { + conn, err := l.Accept() + if err != nil { + log.Error(err) + return + } + go srv.serve(conn) + } +} + +func (srv *tcpServer) serve(c net.Conn) { + defer c.Close() + + u, _ := url.Parse(srv.remote) + + if u.Scheme == "ws" || u.Scheme == "wss" { + conn1, resp, err := dialer.Dial(srv.remote, nil) + if err != nil { + log.Errorln(err) + return + } + resp.Body.Close() + defer conn1.Close() + if resp.StatusCode != http.StatusSwitchingProtocols { + log.Errorf("dial remote ws %d", resp.StatusCode) + return + } + forwardWS2TCP(conn1, c) + return + } + + if u.Scheme == "tcp" { + conn1, err := net.Dial("tcp", u.Host) + if err != nil { + log.Errorln(err) + return + } + defer conn1.Close() + forwardTCP2TCP(c, conn1) + return + } + log.Errorf("unsupported scheme %s", u.Scheme) +} diff --git a/server_test.go b/server_test.go new file mode 100644 index 0000000..b5d8f77 --- /dev/null +++ b/server_test.go @@ -0,0 +1,139 @@ +package main + +import ( + "bytes" + "io/ioutil" + "net" + "net/http" + "testing" + "time" + + log "github.com/fangdingjun/go-log/v5" + "github.com/gorilla/websocket" + "gopkg.in/yaml.v2" +) + +func TestServer(t *testing.T) { + cfgfile := "config.example.yaml" + data, err := ioutil.ReadFile(cfgfile) + if err != nil { + log.Fatal(err) + } + var cfg conf + if err := yaml.Unmarshal(data, &cfg); err != nil { + log.Fatal(err) + } + makeServers(cfg) + l1, err := net.Listen("tcp", "127.0.0.1:2903") + if err != nil { + t.Fatal(err) + } + go func() { + defer l1.Close() + for { + + c1, err := l1.Accept() + if err != nil { + log.Errorln(err) + return + } + go func(c net.Conn) { + defer c.Close() + data := make([]byte, 1024) + for { + n, err := c.Read(data) + if err != nil { + log.Errorln(err) + break + } + c.Write(data[:n]) + log.Infof("2903 receive: %s", string(data[:n])) + } + }(c1) + } + }() + l2, err := net.Listen("tcp", "127.0.0.1:2904") + if err != nil { + t.Fatal(err) + } + go func() { + defer l2.Close() + for { + c1, err := l2.Accept() + if err != nil { + log.Errorln(err) + } + go func(c net.Conn) { + defer c.Close() + data := make([]byte, 1024) + for { + n, err := c.Read(data) + if err != nil { + log.Errorln(err) + break + } + c.Write(data[:n]) + log.Infof("2904 receive: %s", string(data[:n])) + } + }(c1) + } + }() + + time.Sleep(time.Second) + c1, resp, err := dialer.Dial("ws://127.0.0.1:2901/p1", nil) + if err != nil { + t.Fatal(err) + } + if resp.StatusCode != http.StatusSwitchingProtocols { + t.Fatalf("dial ws code %d", resp.StatusCode) + } + err = c1.WriteMessage(websocket.BinaryMessage, []byte("p1")) + if err != nil { + t.Fatal(err) + } + _, d, err := c1.ReadMessage() + if err != nil { + t.Fatal(err) + } + if !bytes.Equal([]byte("p1"), d) { + t.Errorf("failed msg not equal, expect p1, got %s", d) + } + c2, resp, err := dialer.Dial("ws://127.0.0.1:2901/p2", nil) + if err != nil { + t.Fatal(err) + } + if err != nil { + t.Fatal(err) + } + if resp.StatusCode != http.StatusSwitchingProtocols { + t.Fatalf("dial ws code %d", resp.StatusCode) + } + err = c2.WriteMessage(websocket.BinaryMessage, []byte("p2")) + if err != nil { + t.Fatal(err) + } + _, d, err = c2.ReadMessage() + if err != nil { + t.Fatal(err) + } + if !bytes.Equal([]byte("p2"), d) { + t.Errorf("failed msg not equal, expect p2, got %s", d) + } + + c3, err := net.Dial("tcp", "127.0.0.1:2905") + if err != nil { + t.Fatal(err) + } + _, err = c3.Write([]byte("c3")) + if err != nil { + t.Fatal(err) + } + d2 := make([]byte, 20) + n, err := c3.Read(d2) + if err != nil { + t.Fatal(err) + } + if !bytes.Equal([]byte("c3"), d2[:n]) { + t.Errorf("failed msg not equal, expect c3, got %s", d2[:n]) + } +}