func loginToServer(cli *client.ProxyClient) (c *conn.Conn, err error) {
c, err = conn.ConnectServer(client.ServerAddr, client.ServerPort)
if err != nil {
log.Error("ProxyName [%s], connect to server [%s:%d] error, %v", cli.Name, client.ServerAddr, client.ServerPort, err)
return
}
nowTime := time.Now().Unix()
req := &msg.ControlReq{
Type: consts.NewCtlConn,
ProxyName: cli.Name,
UseEncryption: cli.UseEncryption,
UseGzip: cli.UseGzip,
PrivilegeMode: cli.PrivilegeMode,
ProxyType: cli.Type,
Timestamp: nowTime,
}
if cli.PrivilegeMode {
privilegeKey := pcrypto.GetAuthKey(cli.Name + client.PrivilegeToken + fmt.Sprintf("%d", nowTime))
req.RemotePort = cli.RemotePort
req.CustomDomains = cli.CustomDomains
req.PrivilegeKey = privilegeKey
} else {
authKey := pcrypto.GetAuthKey(cli.Name + cli.AuthToken + fmt.Sprintf("%d", nowTime))
req.AuthKey = authKey
}
buf, _ := json.Marshal(req)
err = c.Write(string(buf) + "\n")
if err != nil {
log.Error("ProxyName [%s], write to server error, %v", cli.Name, err)
return
}
res, err := c.ReadLine()
if err != nil {
log.Error("ProxyName [%s], read from server error, %v", cli.Name, err)
return
}
log.Debug("ProxyName [%s], read [%s]", cli.Name, res)
ctlRes := &msg.ControlRes{}
if err = json.Unmarshal([]byte(res), &ctlRes); err != nil {
log.Error("ProxyName [%s], format server response error, %v", cli.Name, err)
return
}
if ctlRes.Code != 0 {
log.Error("ProxyName [%s], start proxy error, %s", cli.Name, ctlRes.Msg)
return c, fmt.Errorf("%s", ctlRes.Msg)
}
log.Debug("ProxyName [%s], connect to server [%s:%d] success!", cli.Name, client.ServerAddr, client.ServerPort)
return
}
// if success, ret equals 0, otherwise greater than 0
func doLogin(req *msg.ControlReq, c *conn.Conn) (ret int64, info string) {
ret = 1
// check if proxy name exist
s, ok := server.ProxyServers[req.ProxyName]
if !ok {
info = fmt.Sprintf("ProxyName [%s] is not exist", req.ProxyName)
log.Warn(info)
return
}
// check authKey
nowTime := time.Now().Unix()
authKey := pcrypto.GetAuthKey(req.ProxyName + s.AuthToken + fmt.Sprintf("%d", req.Timestamp))
// authKey avaiable in 15 minutes
if nowTime-req.Timestamp > 15*60 {
info = fmt.Sprintf("ProxyName [%s], authorization timeout", req.ProxyName)
log.Warn(info)
return
} else if req.AuthKey != authKey {
info = fmt.Sprintf("ProxyName [%s], authorization failed", req.ProxyName)
log.Warn(info)
return
}
// control conn
if req.Type == consts.NewCtlConn {
if s.Status == consts.Working {
info = fmt.Sprintf("ProxyName [%s], already in use", req.ProxyName)
log.Warn(info)
return
}
// set infomations from frpc
s.UseEncryption = req.UseEncryption
// start proxy and listen for user connections, no block
err := s.Start(c)
if err != nil {
info = fmt.Sprintf("ProxyName [%s], start proxy error: %v", req.ProxyName, err)
log.Warn(info)
return
}
log.Info("ProxyName [%s], start proxy success", req.ProxyName)
} else if req.Type == consts.NewWorkConn {
// work conn
if s.Status != consts.Working {
log.Warn("ProxyName [%s], is not working when it gets one new work connnection", req.ProxyName)
return
}
// the connection will close after join over
s.RegisterNewWorkConn(c)
} else {
info = fmt.Sprintf("Unsupport login message type [%d]", req.Type)
log.Warn("Unsupport login message type [%d]", req.Type)
return
}
ret = 0
return
}
func (p *ProxyClient) GetRemoteConn(addr string, port int64) (c *conn.Conn, err error) {
defer func() {
if err != nil {
c.Close()
}
}()
c, err = conn.ConnectServer(addr, port)
if err != nil {
log.Error("ProxyName [%s], connect to server [%s:%d] error, %v", p.Name, addr, port, err)
return
}
nowTime := time.Now().Unix()
authKey := pcrypto.GetAuthKey(p.Name + p.AuthToken + fmt.Sprintf("%d", nowTime))
req := &msg.ControlReq{
Type: consts.NewWorkConn,
ProxyName: p.Name,
AuthKey: authKey,
Timestamp: nowTime,
}
buf, _ := json.Marshal(req)
err = c.Write(string(buf) + "\n")
if err != nil {
log.Error("ProxyName [%s], write to server error, %v", p.Name, err)
return
}
err = nil
return
}
// if success, ret equals 0, otherwise greater than 0
func doLogin(req *msg.ControlReq, c *conn.Conn) (ret int64, info string) {
ret = 1
if req.PrivilegeMode && !server.PrivilegeMode {
info = fmt.Sprintf("ProxyName [%s], PrivilegeMode is disabled in frps", req.ProxyName)
log.Warn("info")
return
}
var (
s *server.ProxyServer
ok bool
)
s, ok = server.ProxyServers[req.ProxyName]
if req.PrivilegeMode && req.Type == consts.NewCtlConn {
log.Debug("ProxyName [%s], doLogin and privilege mode is enabled", req.ProxyName)
} else {
if !ok {
info = fmt.Sprintf("ProxyName [%s] is not exist", req.ProxyName)
log.Warn(info)
return
}
}
// check authKey or privilegeKey
nowTime := time.Now().Unix()
if req.PrivilegeMode {
privilegeKey := pcrypto.GetAuthKey(req.ProxyName + server.PrivilegeToken + fmt.Sprintf("%d", req.Timestamp))
// privilegeKey avaiable in 15 minutes
if nowTime-req.Timestamp > 15*60 {
info = fmt.Sprintf("ProxyName [%s], privilege mode authorization timeout", req.ProxyName)
log.Warn(info)
return
} else if req.PrivilegeKey != privilegeKey {
info = fmt.Sprintf("ProxyName [%s], privilege mode authorization failed", req.ProxyName)
log.Warn(info)
return
}
} else {
authKey := pcrypto.GetAuthKey(req.ProxyName + s.AuthToken + fmt.Sprintf("%d", req.Timestamp))
// authKey avaiable in 15 minutes
if nowTime-req.Timestamp > 15*60 {
info = fmt.Sprintf("ProxyName [%s], authorization timeout", req.ProxyName)
log.Warn(info)
return
} else if req.AuthKey != authKey {
info = fmt.Sprintf("ProxyName [%s], authorization failed", req.ProxyName)
log.Warn(info)
return
}
}
// control conn
if req.Type == consts.NewCtlConn {
if req.PrivilegeMode {
s = server.NewProxyServerFromCtlMsg(req)
err := server.CreateProxy(s)
if err != nil {
info = fmt.Sprintf("ProxyName [%s], %v", req.ProxyName, err)
log.Warn(info)
return
}
}
if s.Status == consts.Working {
info = fmt.Sprintf("ProxyName [%s], already in use", req.ProxyName)
log.Warn(info)
return
}
// check if vhost_port is set
if s.Type == "http" && server.VhostHttpMuxer == nil {
info = fmt.Sprintf("ProxyName [%s], type [http] not support when vhost_http_port is not set", req.ProxyName)
log.Warn(info)
return
}
if s.Type == "https" && server.VhostHttpsMuxer == nil {
info = fmt.Sprintf("ProxyName [%s], type [https] not support when vhost_https_port is not set", req.ProxyName)
log.Warn(info)
return
}
// set infomations from frpc
s.UseEncryption = req.UseEncryption
s.UseGzip = req.UseGzip
// start proxy and listen for user connections, no block
err := s.Start(c)
if err != nil {
info = fmt.Sprintf("ProxyName [%s], start proxy error: %v", req.ProxyName, err)
log.Warn(info)
return
}
log.Info("ProxyName [%s], start proxy success", req.ProxyName)
if req.PrivilegeMode {
log.Info("ProxyName [%s], created by PrivilegeMode", req.ProxyName)
}
} else if req.Type == consts.NewWorkConn {
// work conn
if s.Status != consts.Working {
log.Warn("ProxyName [%s], is not working when it gets one new work connnection", req.ProxyName)
return
}
// the connection will close after join over
s.RegisterNewWorkConn(c)
} else {
info = fmt.Sprintf("Unsupport login message type [%d]", req.Type)
log.Warn("Unsupport login message type [%d]", req.Type)
return
}
ret = 0
return
}
