func apiReload(c *gin.Context) {
res := &GeneralResponse{}
defer func() {
buf, _ := json.Marshal(res)
log.Info("Http response [/api/reload]: %s", string(buf))
}()
log.Info("Http request: [/api/reload]")
err := ReloadConf(ConfigFile)
if err != nil {
res.Code = 2
res.Msg = fmt.Sprintf("%v", err)
log.Error("frps reload error: %v", err)
}
c.JSON(200, res)
}
// 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
}
// loop for reading messages from frpc after control connection is established
func msgReader(cli *client.ProxyClient, c *conn.Conn, msgSendChan chan interface{}) error {
// for heartbeat
var heartbeatTimeout bool = false
timer := time.AfterFunc(time.Duration(client.HeartBeatTimeout)*time.Second, func() {
heartbeatTimeout = true
c.Close()
log.Error("ProxyName [%s], heartbeatRes from frps timeout", cli.Name)
})
defer timer.Stop()
for {
buf, err := c.ReadLine()
if err == io.EOF || c == nil || c.IsClosed() {
c.Close()
log.Warn("ProxyName [%s], frps close this control conn!", cli.Name)
var delayTime time.Duration = 1
// loop until reconnect to frps
for {
log.Info("ProxyName [%s], try to reconnect to frps [%s:%d]...", cli.Name, client.ServerAddr, client.ServerPort)
c, err = loginToServer(cli)
if err == nil {
close(msgSendChan)
msgSendChan = make(chan interface{}, 1024)
go heartbeatSender(c, msgSendChan)
go msgSender(cli, c, msgSendChan)
break
}
if delayTime < 60 {
delayTime = delayTime * 2
}
time.Sleep(delayTime * time.Second)
}
continue
} else if err != nil {
log.Warn("ProxyName [%s], read from frps error: %v", cli.Name, err)
continue
}
ctlRes := &msg.ControlRes{}
if err := json.Unmarshal([]byte(buf), &ctlRes); err != nil {
log.Warn("ProxyName [%s], parse msg from frps error: %v : %s", cli.Name, err, buf)
continue
}
switch ctlRes.Type {
case consts.HeartbeatRes:
log.Debug("ProxyName [%s], receive heartbeat response", cli.Name)
timer.Reset(time.Duration(client.HeartBeatTimeout) * time.Second)
case consts.NoticeUserConn:
log.Debug("ProxyName [%s], new user connection", cli.Name)
// join local and remote connections, async
go cli.StartTunnel(client.ServerAddr, client.ServerPort)
default:
log.Warn("ProxyName [%s}, unsupport msgType [%d]", cli.Name, ctlRes.Type)
}
}
return nil
}
// the function can only reload proxy configures
// common section won't be changed
func ReloadConf(confFile string) (err error) {
loadProxyServers, err := loadProxyConf(confFile)
if err != nil {
return err
}
ProxyServersMutex.Lock()
for name, proxyServer := range loadProxyServers {
oldProxyServer, ok := ProxyServers[name]
if ok {
if !oldProxyServer.Compare(proxyServer) {
oldProxyServer.Close()
proxyServer.Init()
ProxyServers[name] = proxyServer
log.Info("ProxyName [%s] configure change, restart", name)
}
} else {
proxyServer.Init()
ProxyServers[name] = proxyServer
log.Info("ProxyName [%s] is new, init it", name)
}
}
// proxies created by PrivilegeMode won't be deleted
for name, oldProxyServer := range ProxyServers {
_, ok := loadProxyServers[name]
if !ok {
if !oldProxyServer.PrivilegeMode {
oldProxyServer.Close()
delete(ProxyServers, name)
log.Info("ProxyName [%s] deleted, close it", name)
} else {
log.Info("ProxyName [%s] created by PrivilegeMode, won't be closed", name)
}
}
}
ProxyServersMutex.Unlock()
return nil
}
func heartbeatSender(c *conn.Conn, msgSendChan chan interface{}) {
heartbeatReq := &msg.ControlReq{
Type: consts.HeartbeatReq,
}
log.Info("Start to send heartbeat to frps")
for {
time.Sleep(time.Duration(client.HeartBeatInterval) * time.Second)
if c != nil && !c.IsClosed() {
log.Debug("Send heartbeat to server")
msgSendChan <- heartbeatReq
} else {
break
}
}
log.Debug("Heartbeat goroutine exit")
}
// connection from every client and server
func controlWorker(c *conn.Conn) {
// if login message type is NewWorkConn, don't close this connection
var closeFlag bool = true
var s *server.ProxyServer
defer func() {
if closeFlag {
c.Close()
if s != nil {
s.Close()
}
}
}()
// get login message
buf, err := c.ReadLine()
if err != nil {
log.Warn("Read error, %v", err)
return
}
log.Debug("Get msg from frpc: %s", buf)
cliReq := &msg.ControlReq{}
if err := json.Unmarshal([]byte(buf), &cliReq); err != nil {
log.Warn("Parse msg from frpc error: %v : %s", err, buf)
return
}
// login when type is NewCtlConn or NewWorkConn
ret, info := doLogin(cliReq, c)
s, ok := server.ProxyServers[cliReq.ProxyName]
if !ok {
log.Warn("ProxyName [%s] is not exist", cliReq.ProxyName)
return
}
// if login type is NewWorkConn, nothing will be send to frpc
if cliReq.Type != consts.NewWorkConn {
cliRes := &msg.ControlRes{
Type: consts.NewCtlConnRes,
Code: ret,
Msg: info,
}
byteBuf, _ := json.Marshal(cliRes)
err = c.Write(string(byteBuf) + "\n")
if err != nil {
log.Warn("ProxyName [%s], write to client error, proxy exit", s.Name)
time.Sleep(1 * time.Second)
return
}
} else {
closeFlag = false
return
}
// if login failed, just return
if ret > 0 {
return
}
// create a channel for sending messages
msgSendChan := make(chan interface{}, 1024)
go msgSender(s, c, msgSendChan)
go noticeUserConn(s, msgSendChan)
// loop for reading control messages from frpc and deal with different types
msgReader(s, c, msgSendChan)
close(msgSendChan)
log.Info("ProxyName [%s], I'm dead!", s.Name)
return
}
// start listening for user conns
func (p *ProxyServer) Start(c *conn.Conn) (err error) {
p.CtlConn = c
p.Init()
if p.Type == "tcp" {
l, err := conn.Listen(p.BindAddr, p.ListenPort)
if err != nil {
return err
}
p.listeners = append(p.listeners, l)
} else if p.Type == "http" {
for _, domain := range p.CustomDomains {
l, err := VhostMuxer.Listen(domain)
if err != nil {
return err
}
p.listeners = append(p.listeners, l)
}
}
p.Lock()
p.Status = consts.Working
p.Unlock()
// start a goroutine for every listener to accept user connection
for _, listener := range p.listeners {
go func(l Listener) {
for {
// block
// if listener is closed, err returned
c, err := l.Accept()
if err != nil {
log.Info("ProxyName [%s], listener is closed", p.Name)
return
}
log.Debug("ProxyName [%s], get one new user conn [%s]", p.Name, c.GetRemoteAddr())
if p.Status != consts.Working {
log.Debug("ProxyName [%s] is not working, new user conn close", p.Name)
c.Close()
return
}
// start another goroutine for join two conns from frpc and user
go func() {
workConn, err := p.getWorkConn()
if err != nil {
return
}
userConn := c
// msg will transfer to another without modifying
// l means local, r means remote
log.Debug("Join two connections, (l[%s] r[%s]) (l[%s] r[%s])", workConn.GetLocalAddr(), workConn.GetRemoteAddr(),
userConn.GetLocalAddr(), userConn.GetRemoteAddr())
if p.UseEncryption {
go conn.JoinMore(userConn, workConn, p.AuthToken)
} else {
go conn.Join(userConn, workConn)
}
}()
}
}(listener)
}
return nil
}
// 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
}
func main() {
// the configures parsed from file will be replaced by those from command line if exist
args, err := docopt.Parse(usage, nil, true, version.Full(), false)
if args["-c"] != nil {
server.ConfigFile = args["-c"].(string)
}
err = server.LoadConf(server.ConfigFile)
if err != nil {
fmt.Println(err)
os.Exit(-1)
}
// reload check
if args["--reload"] != nil {
if args["--reload"].(bool) {
resp, err := http.Get("http://" + server.BindAddr + ":" + fmt.Sprintf("%d", server.DashboardPort) + "/api/reload")
if err != nil {
fmt.Printf("frps reload error: %v\n", err)
os.Exit(1)
} else {
defer resp.Body.Close()
body, err := ioutil.ReadAll(resp.Body)
if err != nil {
fmt.Printf("frps reload error: %v\n", err)
os.Exit(1)
}
res := &server.GeneralResponse{}
err = json.Unmarshal(body, &res)
if err != nil {
fmt.Printf("http response error: %v\n", err)
os.Exit(1)
} else if res.Code != 0 {
fmt.Printf("reload error: %s\n", res.Msg)
os.Exit(1)
}
fmt.Printf("reload success\n")
os.Exit(0)
}
}
}
if args["-L"] != nil {
if args["-L"].(string) == "console" {
server.LogWay = "console"
} else {
server.LogWay = "file"
server.LogFile = args["-L"].(string)
}
}
if args["--log-level"] != nil {
server.LogLevel = args["--log-level"].(string)
}
if args["--addr"] != nil {
addr := strings.Split(args["--addr"].(string), ":")
if len(addr) != 2 {
fmt.Println("--addr format error: example 0.0.0.0:7000")
os.Exit(1)
}
bindPort, err := strconv.ParseInt(addr[1], 10, 64)
if err != nil {
fmt.Println("--addr format error, example 0.0.0.0:7000")
os.Exit(1)
}
server.BindAddr = addr[0]
server.BindPort = bindPort
}
if args["-v"] != nil {
if args["-v"].(bool) {
fmt.Println(version.Full())
os.Exit(0)
}
}
log.InitLog(server.LogWay, server.LogFile, server.LogLevel, server.LogMaxDays)
l, err := conn.Listen(server.BindAddr, server.BindPort)
if err != nil {
log.Error("Create server listener error, %v", err)
os.Exit(1)
}
// create vhost if VhostHttpPort != 0
if server.VhostHttpPort != 0 {
vhostListener, err := conn.Listen(server.BindAddr, server.VhostHttpPort)
if err != nil {
log.Error("Create vhost http listener error, %v", err)
os.Exit(1)
}
server.VhostMuxer, err = vhost.NewHttpMuxer(vhostListener, 30*time.Second)
if err != nil {
log.Error("Create vhost httpMuxer error, %v", err)
}
}
// create dashboard web server if DashboardPort is set, so it won't be 0
if server.DashboardPort != 0 {
err := server.RunDashboardServer(server.BindAddr, server.DashboardPort)
if err != nil {
log.Error("Create dashboard web server error, %v", err)
os.Exit(1)
}
}
log.Info("Start frps success")
ProcessControlConn(l)
}
func main() {
// the configures parsed from file will be replaced by those from command line if exist
args, err := docopt.Parse(usage, nil, true, version.Full(), false)
if args["-c"] != nil {
configFile = args["-c"].(string)
}
err = client.LoadConf(configFile)
if err != nil {
fmt.Println(err)
os.Exit(-1)
}
if args["-L"] != nil {
if args["-L"].(string) == "console" {
client.LogWay = "console"
} else {
client.LogWay = "file"
client.LogFile = args["-L"].(string)
}
}
if args["--log-level"] != nil {
client.LogLevel = args["--log-level"].(string)
}
if args["--server-addr"] != nil {
addr := strings.Split(args["--server-addr"].(string), ":")
if len(addr) != 2 {
fmt.Println("--server-addr format error: example 0.0.0.0:7000")
os.Exit(1)
}
serverPort, err := strconv.ParseInt(addr[1], 10, 64)
if err != nil {
fmt.Println("--server-addr format error, example 0.0.0.0:7000")
os.Exit(1)
}
client.ServerAddr = addr[0]
client.ServerPort = serverPort
}
if args["-v"] != nil {
if args["-v"].(bool) {
fmt.Println(version.Full())
os.Exit(0)
}
}
log.InitLog(client.LogWay, client.LogFile, client.LogLevel, client.LogMaxDays)
// wait until all control goroutine exit
var wait sync.WaitGroup
wait.Add(len(client.ProxyClients))
for _, client := range client.ProxyClients {
go ControlProcess(client, &wait)
}
log.Info("Start frpc success")
wait.Wait()
log.Warn("All proxy exit!")
}