3.8.0

README-ZH.md

@@ -101,6 +101,22 @@ cd到代码根目录，执行
 ```
 make
 ```
+手动编译特定系统和架构 
+All GOOS values:
+```
+"aix", "android", "darwin", "dragonfly", "freebsd", "hurd", "illumos", "ios", "js", "linux", "nacl", "netbsd", "openbsd", "plan9", "solaris", "windows", "zos"
+```
+All GOARCH values:
+```
+"386", "amd64", "amd64p32", "arm", "arm64", "arm64be", "armbe", "loong64", "mips", "mips64", "mips64le", "mips64p32", "mips64p32le", "mipsle", "ppc", "ppc64", "ppc64le", "riscv", "riscv64", "s390", "s390x", "sparc", "sparc64", "wasm"
+```
+
+比如linux+amd64
+```
+export GOPROXY=https://goproxy.io,direct
+go mod tidy
+CGO_ENABLED=0 env GOOS=linux GOARCH=amd64 go build -o openp2p --ldflags '-s -w ' -gcflags '-l' -p 8 -installsuffix cgo ./cmd
+```
 
 ## RoadMap
 近期计划：

README.md

@@ -109,6 +109,23 @@ cd root directory of the socure code and execute
 make
 ```
 
+build specified os and arch.  
+All GOOS values:
+```
+"aix", "android", "darwin", "dragonfly", "freebsd", "hurd", "illumos", "ios", "js", "linux", "nacl", "netbsd", "openbsd", "plan9", "solaris", "windows", "zos"
+```
+All GOARCH values:
+```
+"386", "amd64", "amd64p32", "arm", "arm64", "arm64be", "armbe", "loong64", "mips", "mips64", "mips64le", "mips64p32", "mips64p32le", "mipsle", "ppc", "ppc64", "ppc64le", "riscv", "riscv64", "s390", "s390x", "sparc", "sparc64", "wasm"
+```
+
+For example linux+amd64
+```
+export GOPROXY=https://goproxy.io,direct
+go mod tidy
+CGO_ENABLED=0 env GOOS=linux GOARCH=amd64 go build -o openp2p --ldflags '-s -w ' -gcflags '-l' -p 8 -installsuffix cgo ./cmd
+```
+
 ## RoadMap
 Short-Term:
 1. ~~Support IPv6.~~(100%)

core/config.go

@@ -58,9 +58,10 @@ func (c *Config) switchApp(app AppConfig, enabled int) {
 			c.Apps[i].Enabled = enabled
 			c.Apps[i].retryNum = 0
 			c.Apps[i].nextRetryTime = time.Now()
-			return
+			break
 		}
 	}
+	c.save()
 }
 func (c *Config) retryApp(peerNode string) {
 	c.mtx.Lock()
@@ -76,6 +77,7 @@ func (c *Config) retryApp(peerNode string) {
 func (c *Config) add(app AppConfig, override bool) {
 	c.mtx.Lock()
 	defer c.mtx.Unlock()
+	defer c.save()
 	if app.SrcPort == 0 || app.DstPort == 0 {
 		gLog.Println(LvERROR, "invalid app ", app)
 		return
@@ -97,17 +99,19 @@ func (c *Config) delete(app AppConfig) {
 	}
 	c.mtx.Lock()
 	defer c.mtx.Unlock()
+	defer c.save()
 	for i := 0; i < len(c.Apps); i++ {
 		if c.Apps[i].Protocol == app.Protocol && c.Apps[i].SrcPort == app.SrcPort {
 			c.Apps = append(c.Apps[:i], c.Apps[i+1:]...)
 			return
 		}
 	}
+
 }
 
 func (c *Config) save() {
-	c.mtx.Lock()
-	defer c.mtx.Unlock()
+	// c.mtx.Lock()
+	// defer c.mtx.Unlock()  // internal call
 	data, _ := json.MarshalIndent(c, "", "  ")
 	err := ioutil.WriteFile("config.json", data, 0644)
 	if err != nil {
@@ -142,6 +146,7 @@ func (c *Config) load() error {
 func (c *Config) setToken(token uint64) {
 	c.mtx.Lock()
 	defer c.mtx.Unlock()
+	defer c.save()
 	if token != 0 {
 		c.Network.Token = token
 	}
@@ -149,16 +154,19 @@ func (c *Config) setToken(token uint64) {
 func (c *Config) setUser(user string) {
 	c.mtx.Lock()
 	defer c.mtx.Unlock()
+	defer c.save()
 	c.Network.User = user
 }
 func (c *Config) setNode(node string) {
 	c.mtx.Lock()
 	defer c.mtx.Unlock()
+	defer c.save()
 	c.Network.Node = node
 }
 func (c *Config) setShareBandwidth(bw int) {
 	c.mtx.Lock()
 	defer c.mtx.Unlock()
+	defer c.save()
 	c.Network.ShareBandwidth = bw
 }
 

core/errorcode.go

@@ -14,6 +14,7 @@ var (
 	ErrorLogin               = errors.New("user or password not correct")
 	ErrNodeTooShort          = errors.New("node name too short, it must >=8 charaters")
 	ErrPeerOffline           = errors.New("peer offline")
+	ErrNetwork               = errors.New("network error")
 	ErrMsgFormat             = errors.New("message format wrong")
 	ErrVersionNotCompatible  = errors.New("version not compatible")
 	ErrOverlayConnDisconnect = errors.New("overlay connection is disconnected")

core/handlepush.go

@@ -176,7 +176,7 @@ func handlePush(pn *P2PNetwork, subType uint16, msg []byte) error {
 		}
 		pn.write(MsgReport, MsgReportApps, &req)
 	case MsgPushReportLog:
-		gLog.Println(LvINFO, "MsgPushReportLog")
+		gLog.Println(LvDEBUG, "MsgPushReportLog")
 		req := ReportLogReq{}
 		err := json.Unmarshal(msg[openP2PHeaderSize:], &req)
 		if err != nil {
@@ -241,7 +241,6 @@ func handlePush(pn *P2PNetwork, subType uint16, msg []byte) error {
 		newConf.Protocol = newApp.Protocol
 		newConf.SrcPort = newApp.SrcPort
 		gConf.add(newConf, false)
-		gConf.save()          // save quickly for the next request reportApplist
 		pn.DeleteApp(oldConf) // DeleteApp may cost some times, execute at the end
 		// autoReconnect will auto AddApp
 		// pn.AddApp(config)
@@ -256,7 +255,6 @@ func handlePush(pn *P2PNetwork, subType uint16, msg []byte) error {
 		}
 		gConf.setNode(req.NewName)
 		gConf.setShareBandwidth(req.Bandwidth)
-		gConf.save()
 		// TODO: hot reload
 		os.Exit(0)
 	case MsgPushSwitchApp:

core/holepunch.go

@@ -23,11 +23,11 @@ func handshakeC2C(t *P2PTunnel) (err error) {
 		gLog.Println(LvDEBUG, "handshakeC2C write MsgPunchHandshake error:", err)
 		return err
 	}
-	ra, head, _, _, err := UDPRead(conn, 5000)
+	ra, head, _, _, err := UDPRead(conn, SymmetricHandshakeAckTimeout)
 	if err != nil {
 		time.Sleep(time.Millisecond * 200)
 		gLog.Println(LvDEBUG, err, ", return this error when ip was not reachable, retry read")
-		ra, head, _, _, err = UDPRead(conn, 5000)
+		ra, head, _, _, err = UDPRead(conn, SymmetricHandshakeAckTimeout)
 		if err != nil {
 			gLog.Println(LvDEBUG, "handshakeC2C read MsgPunchHandshake error:", err)
 			return err
@@ -38,7 +38,7 @@ func handshakeC2C(t *P2PTunnel) (err error) {
 	if head.MainType == MsgP2P && head.SubType == MsgPunchHandshake {
 		gLog.Printf(LvDEBUG, "read %d handshake ", t.id)
 		UDPWrite(conn, t.ra, MsgP2P, MsgPunchHandshakeAck, P2PHandshakeReq{ID: t.id})
-		_, head, _, _, err = UDPRead(conn, 5000)
+		_, head, _, _, err = UDPRead(conn, SymmetricHandshakeAckTimeout)
 		if err != nil {
 			gLog.Println(LvDEBUG, "handshakeC2C write MsgPunchHandshakeAck error", err)
 			return err
@@ -140,7 +140,7 @@ func handshakeS2C(t *P2PTunnel) error {
 			}
 			defer conn.Close()
 			UDPWrite(conn, t.ra, MsgP2P, MsgPunchHandshake, P2PHandshakeReq{ID: t.id})
-			_, head, _, _, err := UDPRead(conn, 10000)
+			_, head, _, _, err := UDPRead(conn, SymmetricHandshakeAckTimeout)
 			if err != nil {
 				// gLog.Println(LevelDEBUG, "one of the handshake error:", err)
 				return err
@@ -155,7 +155,7 @@ func handshakeS2C(t *P2PTunnel) error {
 			if head.MainType == MsgP2P && head.SubType == MsgPunchHandshake {
 				gLog.Printf(LvDEBUG, "handshakeS2C read %d handshake ", t.id)
 				UDPWrite(conn, t.ra, MsgP2P, MsgPunchHandshakeAck, P2PHandshakeReq{ID: t.id})
-				_, head, _, _, err = UDPRead(conn, 5000)
+				_, head, _, _, err = UDPRead(conn, SymmetricHandshakeAckTimeout)
 				if err != nil {
 					gLog.Println(LvDEBUG, "handshakeS2C handshake error")
 					return err

core/nat.go

@@ -34,7 +34,7 @@ func natTCP(serverHost string, serverPort int, localPort int) (publicIP string,
 		return
 	}
 	b := make([]byte, 1000)
-	conn.SetReadDeadline(time.Now().Add(time.Second * 5))
+	conn.SetReadDeadline(time.Now().Add(NatTestTimeout))
 	n, rderr := conn.Read(b)
 	if rderr != nil {
 		fmt.Printf("Read error: %s\n", rderr)
@@ -153,12 +153,12 @@ func publicIPTest(publicIP string, echoPort int) (hasPublicIP int, hasUPNPorNATP
 			}
 			log.Println("PublicIP:", ext)
 
-			externalPort, err := nat.AddPortMapping("udp", echoPort, echoPort, "openp2p", 30)
+			externalPort, err := nat.AddPortMapping("udp", echoPort, echoPort, "openp2p", 604800) // 7 days, upnp will perform failed when os start
 			if err != nil {
 				gLog.Println(LvDEBUG, "could not add udp UPNP port mapping", externalPort)
 				break
 			} else {
-				nat.AddPortMapping("tcp", echoPort, echoPort, "openp2p", 604800)
+				nat.AddPortMapping("tcp", echoPort, echoPort, "openp2p", 604800) // 7 days
 			}
 		}
 		gLog.Printf(LvDEBUG, "public ip test start %s:%d", publicIP, echoPort)

core/overlay.go

@@ -42,7 +42,6 @@ type overlayConn struct {
 func (oConn *overlayConn) run() {
 	gLog.Printf(LvDEBUG, "%d overlayConn run start", oConn.id)
 	defer gLog.Printf(LvDEBUG, "%d overlayConn run end", oConn.id)
-	oConn.running = true
 	oConn.lastReadUDPTs = time.Now()
 	buffer := make([]byte, ReadBuffLen+PaddingSize) // 16 bytes for padding
 	reuseBuff := buffer[:ReadBuffLen]
@@ -117,7 +116,7 @@ func (oConn *overlayConn) Read(reuseBuff []byte) (buff []byte, dataLen int, err
 				err = ErrDeadlineExceeded
 			}
 		} else { // as client
-			oConn.connUDP.SetReadDeadline(time.Now().Add(5 * time.Second))
+			oConn.connUDP.SetReadDeadline(time.Now().Add(UDPReadTimeout))
 			dataLen, _, err = oConn.connUDP.ReadFrom(reuseBuff)
 			if err == nil {
 				oConn.lastReadUDPTs = time.Now()
@@ -127,7 +126,7 @@ func (oConn *overlayConn) Read(reuseBuff []byte) (buff []byte, dataLen int, err
 		return
 	}
 	if oConn.connTCP != nil {
-		oConn.connTCP.SetReadDeadline(time.Now().Add(time.Second * 5))
+		oConn.connTCP.SetReadDeadline(time.Now().Add(UDPReadTimeout))
 		dataLen, err = oConn.connTCP.Read(reuseBuff)
 		buff = reuseBuff
 	}

core/p2papp.go

@@ -72,6 +72,7 @@ func (app *p2pApp) listenTCP() error {
 			rtid:     app.rtid,
 			appID:    app.id,
 			appKey:   app.key,
+			running:  true,
 		}
 		// pre-calc key bytes for encrypt
 		if oConn.appKey != 0 {
@@ -100,6 +101,8 @@ func (app *p2pApp) listenTCP() error {
 			msgWithHead := append(relayHead.Bytes(), msg...)
 			app.tunnel.conn.WriteBytes(MsgP2P, MsgRelayData, msgWithHead)
 		}
+		// TODO: wait OverlayConnectRsp instead of sleep
+		time.Sleep(time.Second) // waiting remote node connection ok
 		go oConn.run()
 	}
 	return nil
@@ -117,7 +120,7 @@ func (app *p2pApp) listenUDP() error {
 	buffer := make([]byte, 64*1024+PaddingSize)
 	udpID := make([]byte, 8)
 	for {
-		app.listenerUDP.SetReadDeadline(time.Now().Add(time.Second * 10))
+		app.listenerUDP.SetReadDeadline(time.Now().Add(UDPReadTimeout))
 		len, remoteAddr, err := app.listenerUDP.ReadFrom(buffer)
 		if err != nil {
 			if ne, ok := err.(net.Error); ok && ne.Timeout() {
@@ -152,6 +155,7 @@ func (app *p2pApp) listenUDP() error {
 					rtid:       app.rtid,
 					appID:      app.id,
 					appKey:     app.key,
+					running:    true,
 				}
 				// calc key bytes for encrypt
 				if oConn.appKey != 0 {
@@ -180,6 +184,8 @@ func (app *p2pApp) listenUDP() error {
 					msgWithHead := append(relayHead.Bytes(), msg...)
 					app.tunnel.conn.WriteBytes(MsgP2P, MsgRelayData, msgWithHead)
 				}
+				// TODO: wait OverlayConnectRsp instead of sleep
+				time.Sleep(time.Second) // waiting remote node connection ok
 				go oConn.run()
 				oConn.udpData <- dupData.Bytes()
 			}

core/p2pnetwork.go

@@ -77,7 +77,7 @@ func (pn *P2PNetwork) run() {
 		case <-pn.restartCh:
 			pn.online = false
 			pn.wgReconnect.Wait() // wait read/autorunapp goroutine end
-			time.Sleep(NatTestTimeout)
+			time.Sleep(ClientAPITimeout)
 			err := pn.init()
 			if err != nil {
 				gLog.Println(LvERROR, "P2PNetwork init error:", err)
@@ -128,12 +128,13 @@ func (pn *P2PNetwork) runAll() {
 			continue
 		}
 
-		if time.Now().Add(-time.Minute * 15).After(config.retryTime) { // run normally 15min, reset retrynum
-			config.retryNum = 0
+		if config.retryNum > 0 { // first time not show reconnect log
+			gLog.Printf(LvINFO, "detect app %s disconnect, reconnecting the %d times...", config.AppName, config.retryNum)
+			if time.Now().Add(-time.Minute * 15).After(config.retryTime) { // run normally 15min, reset retrynum
+				config.retryNum = 0
+			}
 		}
-
 		config.retryNum++
-		gLog.Printf(LvINFO, "detect app %s disconnect, reconnecting the %d times...", config.AppName, config.retryNum)
 		config.retryTime = time.Now()
 		config.nextRetryTime = time.Now().Add(retryInterval)
 		config.connectTime = time.Now()
@@ -166,7 +167,7 @@ func (pn *P2PNetwork) addRelayTunnel(config AppConfig) (*P2PTunnel, uint64, stri
 	defer gLog.Printf(LvINFO, "addRelayTunnel to %s end", config.PeerNode)
 	// request a relay node or specify manually(TODO)
 	pn.write(MsgRelay, MsgRelayNodeReq, &RelayNodeReq{config.PeerNode})
-	head, body := pn.read("", MsgRelay, MsgRelayNodeRsp, time.Second*10)
+	head, body := pn.read("", MsgRelay, MsgRelayNodeRsp, ClientAPITimeout)
 	if head == nil {
 		return nil, 0, "", errors.New("read MsgRelayNodeRsp error")
 	}
@@ -407,6 +408,7 @@ func (pn *P2PNetwork) addDirectTunnel(config AppConfig, tid uint64) (*P2PTunnel,
 		t.config.linkMode = LinkModeTCPPunch
 		t.config.isUnderlayServer = 0
 		if err = pn.newTunnel(t, tid, isClient); err == nil {
+			gLog.Println(LvINFO, "TCP4 Punch ok")
 			return t, nil
 		}
 	}
@@ -468,7 +470,7 @@ func (pn *P2PNetwork) init() error {
 		}
 		gLog.Println(LvDEBUG, "detect NAT type:", pn.config.natType, " publicIP:", pn.config.publicIP)
 		gatewayURL := fmt.Sprintf("%s:%d", pn.config.ServerHost, pn.config.ServerPort)
-		uri := "/openp2p/v1/login"
+		uri := "/api/v1/login"
 		config := tls.Config{InsecureSkipVerify: true} // let's encrypt root cert "DST Root CA X3" expired at 2021/09/29. many old system(windows server 2008 etc) will not trust our cert
 		websocket.DefaultDialer.TLSClientConfig = &config
 		u := url.URL{Scheme: "wss", Host: gatewayURL, Path: uri}
@@ -560,7 +562,6 @@ func (pn *P2PNetwork) handleMessage(t int, msg []byte) {
 				gConf.setNode(rsp.Node)
 				pn.config.Node = rsp.Node
 			}
-			gConf.save()
 			pn.localTs = time.Now().Unix()
 			gLog.Printf(LvINFO, "login ok. user=%s,node=%s,Server ts=%d, local ts=%d", rsp.User, rsp.Node, rsp.Ts, pn.localTs)
 		}
@@ -608,6 +609,7 @@ func (pn *P2PNetwork) write(mainType uint16, subType uint16, packet interface{})
 	defer pn.writeMtx.Unlock()
 	if err = pn.conn.WriteMessage(websocket.BinaryMessage, msg); err != nil {
 		gLog.Printf(LvERROR, "write msgType %d,%d error:%s", mainType, subType, err)
+		pn.conn.Close()
 	}
 	return err
 }
@@ -650,6 +652,7 @@ func (pn *P2PNetwork) push(to string, subType uint16, packet interface{}) error
 	defer pn.writeMtx.Unlock()
 	if err = pn.conn.WriteMessage(websocket.BinaryMessage, pushMsg); err != nil {
 		gLog.Printf(LvERROR, "push to %s error:%s", to, err)
+		pn.conn.Close()
 	}
 	return err
 }
@@ -700,6 +703,7 @@ func (pn *P2PNetwork) updateAppHeartbeat(appID uint64) {
 	})
 }
 
+// ipv6 will expired need to refresh.
 func (pn *P2PNetwork) refreshIPv6(force bool) {
 	if !force && !IsIPv6(pn.config.publicIPv6) { // not support ipv6, not refresh
 		return

core/p2ptunnel.go

@@ -36,7 +36,7 @@ func (t *P2PTunnel) requestPeerInfo() error {
 	t.pn.write(MsgQuery, MsgQueryPeerInfoReq, &QueryPeerInfoReq{t.config.peerToken, t.config.PeerNode})
 	head, body := t.pn.read("", MsgQuery, MsgQueryPeerInfoRsp, time.Second*10)
 	if head == nil {
-		return ErrPeerOffline
+		return ErrNetwork // network error, should not be ErrPeerOffline
 	}
 	rsp := QueryPeerInfoRsp{}
 	err := json.Unmarshal(body, &rsp)
@@ -444,7 +444,7 @@ func (t *P2PTunnel) readLoop() {
 				continue
 			}
 			overlayID := binary.LittleEndian.Uint64(body[:8])
-			gLog.Printf(LvDEBUG, "%d tunnel read overlay data %d", t.id, overlayID)
+			gLog.Printf(LvDEBUG, "%d tunnel read overlay data %d bodylen=%d", t.id, overlayID, head.DataLen)
 			s, ok := t.overlayConns.Load(overlayID)
 			if !ok {
 				// debug level, when overlay connection closed, always has some packet not found tunnel
@@ -515,6 +515,7 @@ func (t *P2PTunnel) readLoop() {
 				rtid:     req.RelayTunnelID,
 				appID:    req.AppID,
 				appKey:   GetKey(req.AppID),
+				running:  true,
 			}
 			if req.Protocol == "udp" {
 				oConn.connUDP, err = net.DialUDP("udp", nil, &net.UDPAddr{IP: net.ParseIP(req.DstIP), Port: req.DstPort})

core/protocol.go

@@ -10,7 +10,7 @@ import (
 	"time"
 )
 
-const OpenP2PVersion = "3.6.8"
+const OpenP2PVersion = "3.8.0"
 const ProductName string = "openp2p"
 const LeastSupportVersion = "3.0.0"
 
@@ -139,7 +139,7 @@ const (
 	SymmetricHandshakeNum = 800 // 0.992379
 	// SymmetricHandshakeNum        = 1000 // 0.999510
 	SymmetricHandshakeInterval   = time.Millisecond
-	SymmetricHandshakeAckTimeout = time.Second * 11
+	SymmetricHandshakeAckTimeout = time.Second * 5
 	PeerAddRelayTimeount         = time.Second * 20
 	CheckActiveTimeout           = time.Second * 5
 	PaddingSize                  = 16
@@ -148,6 +148,7 @@ const (
 	RetryInterval                = time.Second * 30
 	PublicIPEchoTimeout          = time.Second * 1
 	NatTestTimeout               = time.Second * 5
+	UDPReadTimeout               = time.Second * 5
 	ClientAPITimeout             = time.Second * 10
 	MaxDirectTry                 = 3
 )

core/udp.go

@@ -18,9 +18,9 @@ func UDPWrite(conn *net.UDPConn, dst net.Addr, mainType uint16, subType uint16,
 	return conn.WriteTo(msg, dst)
 }
 
-func UDPRead(conn *net.UDPConn, timeout int) (ra net.Addr, head *openP2PHeader, result []byte, len int, err error) {
+func UDPRead(conn *net.UDPConn, timeout time.Duration) (ra net.Addr, head *openP2PHeader, result []byte, len int, err error) {
 	if timeout > 0 {
-		deadline := time.Now().Add(time.Millisecond * time.Duration(timeout))
+		deadline := time.Now().Add(timeout)
 		err = conn.SetReadDeadline(deadline)
 		if err != nil {
 			gLog.Println(LvERROR, "SetReadDeadline error")

core/underlay_tcp.go

@@ -69,7 +69,7 @@ func (conn *underlayTCP) Close() error {
 
 func listenTCP(host string, port int, localPort int, mode string) (*underlayTCP, error) {
 	if mode == LinkModeTCPPunch {
-		c, err := reuse.DialTimeout("tcp", fmt.Sprintf("0.0.0.0:%d", localPort), fmt.Sprintf("%s:%d", host, port), SymmetricHandshakeAckTimeout) // TODO: timeout
+		c, err := reuse.DialTimeout("tcp", fmt.Sprintf("0.0.0.0:%d", localPort), fmt.Sprintf("%s:%d", host, port), SymmetricHandshakeAckTimeout)
 		if err != nil {
 			gLog.Println(LvDEBUG, "send tcp punch: ", err)
 			return nil, err

core/util_freebsd.go

@@ -0,0 +1,69 @@
+package openp2p
+
+import (
+	"bufio"
+	"bytes"
+	"io/ioutil"
+	"os"
+	"runtime"
+	"strings"
+	"syscall"
+)
+
+const (
+	defaultInstallPath = "/usr/local/openp2p"
+	defaultBinName     = "openp2p"
+)
+
+func getOsName() (osName string) {
+	var sysnamePath string
+	sysnamePath = "/etc/redhat-release"
+	_, err := os.Stat(sysnamePath)
+	if err != nil && os.IsNotExist(err) {
+		str := "PRETTY_NAME="
+		f, err := os.Open("/etc/os-release")
+		if err == nil {
+			buf := bufio.NewReader(f)
+			for {
+				line, err := buf.ReadString('\n')
+				if err == nil {
+					line = strings.TrimSpace(line)
+					pos := strings.Count(line, str)
+					if pos > 0 {
+						len1 := len([]rune(str)) + 1
+						rs := []rune(line)
+						osName = string(rs[len1 : (len(rs))-1])
+						break
+					}
+				} else {
+					break
+				}
+			}
+		}
+	} else {
+		buff, err := ioutil.ReadFile(sysnamePath)
+		if err == nil {
+			osName = string(bytes.TrimSpace(buff))
+		}
+	}
+	if osName == "" {
+		osName = "FreeBSD"
+	}
+	return
+}
+
+func setRLimit() error {
+	var limit syscall.Rlimit
+	if err := syscall.Getrlimit(syscall.RLIMIT_NOFILE, &limit); err != nil {
+		return err
+	}
+	limit.Max = 65536
+	limit.Cur = limit.Max
+	if err := syscall.Setrlimit(syscall.RLIMIT_NOFILE, &limit); err != nil {
+		return err
+	}
+	return nil
+}
+
+func setFirewall() {
+}