mirror of https://github.com/schollz/croc.git
136 lines
3.0 KiB
Go
136 lines
3.0 KiB
Go
package webrelay
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import (
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"bytes"
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"encoding/base64"
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"encoding/json"
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"net/http"
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"strings"
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"github.com/gorilla/websocket"
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"github.com/schollz/croc/v6/src/comm"
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"github.com/schollz/croc/v6/src/models"
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"github.com/schollz/croc/v6/src/tcp"
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log "github.com/schollz/logger"
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)
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func Run(debugString, port string) (err error) {
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log.SetLevel(debugString)
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http.HandleFunc("/ws", handlews)
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http.Handle("/", http.FileServer(http.Dir("html")))
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log.Infof("running on port %s", port)
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return http.ListenAndServe(":"+port, nil)
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}
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var upgrader = websocket.Upgrader{} // use default options
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func handlews(w http.ResponseWriter, r *http.Request) {
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c, err := upgrader.Upgrade(w, r, nil)
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if err != nil {
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log.Debug("upgrade:", err)
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return
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}
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log.Debugf("connected: %+v", c.RemoteAddr())
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defer c.Close()
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_, message, err := c.ReadMessage()
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if err != nil {
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log.Debug("read:", err)
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return
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}
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log.Debugf("recv: %s", message)
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if bytes.Equal(message, []byte("receive")) {
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// start receiving
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log.Debug("initiating reciever")
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err = receive(c)
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if err != nil {
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log.Error(err)
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}
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}
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return
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}
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type Bundle struct {
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Message string `json:"m,omitempty"`
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PayloadString string `json:"ps,omitempty"`
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PayloadBytes []byte `json:"pb,omitempty"`
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}
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func receive(conn *websocket.Conn) (err error) {
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conn.WriteMessage(websocket.TextMessage, []byte("initiated"))
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var com *comm.Comm
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var banner, externalIP, connectPort string
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for {
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var message []byte
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_, message, err = conn.ReadMessage()
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if err != nil {
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log.Debug("read:", err)
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return
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}
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var bu Bundle
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errBundle := json.Unmarshal(message, &bu)
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if errBundle == nil {
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if bu.Message == "room" {
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relayAddress := models.DEFAULT_RELAY
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relayAddress = "localhost:9009"
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com, banner, externalIP, err = tcp.ConnectToTCPServer(relayAddress, bu.PayloadString)
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if err != nil {
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log.Error(err)
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return
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}
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log.Debugf("comm: %+v", com)
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log.Debugf("banner: %+v", banner)
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log.Debugf("externalIP: %+v", externalIP)
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log.Debugf("err: %+v", err)
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err = com.Send([]byte("ips?"))
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if err != nil {
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log.Error(err)
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return
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}
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var data []byte
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data, err = com.Receive()
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if err != nil {
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log.Error(err)
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return
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}
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log.Debugf("ips data: %s", data)
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err = com.Send([]byte("handshake"))
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if err != nil {
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log.Error(err)
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return
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}
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connectPort = strings.Split(banner, ",")[0]
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log.Debugf("connecting on %s", connectPort)
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err = conn.WriteMessage(websocket.TextMessage, []byte("initpake"))
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if err != nil {
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log.Error(err)
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return
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}
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}
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}
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b, errBase64 := base64.StdEncoding.DecodeString(string(message))
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if errBase64 == nil {
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log.Debug("parsing base64 bytes")
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err = com.Send(b)
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if err != nil {
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log.Error(err)
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return
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}
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b, err = com.Receive()
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if err != nil {
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log.Error(err)
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return
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}
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err = conn.WriteMessage(websocket.TextMessage, []byte(base64.StdEncoding.EncodeToString(b)))
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if err != nil {
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log.Error(err)
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return
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}
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}
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}
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return
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}
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