allow gencfg overwrite and ntp all failed

example_config/p2p_mode/genp2p.yaml

@@ -1,4 +1,6 @@
 Config output dir: /tmp/eg_gen_p2p
+Enable generated config overwrite: false
+Add NodeID to the interface name: true
 ConfigTemplate for edge node: ""
 Network name: "EgNet"
 Edge Node:

example_config/p2p_mode/genp2p_2.yaml

@@ -1,4 +1,6 @@
 Config output dir: /tmp/eg_gen_p2p
+Enable generated config overwrite: false
+Add NodeID to the interface name: true
 ConfigTemplate for edge node: "EgNet_edge1.yaml"
 Network name: "EgNet"
 Edge Node:

example_config/static_mode/genstatic.yaml

@@ -1,4 +1,6 @@
 Config output dir: /tmp/eg_gen_static
+Enable generated config overwrite: false
+Add NodeID to the interface name: true
 ConfigTemplate for edge node: "EgNet_edge1.yaml"
 Network name: "EgNet"
 Edge Node:

example_config/super_mode/EgNet_edge001.yaml

@@ -3,7 +3,7 @@ Interface:
   Name: EgNet001
   VPPIFaceID: 1
   VPPBridgeID: 4242
-  MacAddrPrefix: FA:A7:11:D6
+  MacAddrPrefix: 96:BB:DC:52
   IPv4CIDR: 192.168.76.0/24
   IPv6CIDR: fd95:71cb:a3df:e586::/64
   IPv6LLPrefix: fe80::a3df:0/112
@@ -16,7 +16,7 @@ NodeName: EgNet001
 PostScript: ""
 DefaultTTL: 200
 L2FIBTimeout: 3600
-PrivKey: +KAYwkRgacUbxc52t04z8fTJBgvrkPLsisr0qJOhIUE=
+PrivKey: lyQLML+TbAZvrJpa25ARTAfMvHVQa/a1n3Wcwo7nkDU=
 ListenPort: 3001
 DisabledAf:
   IPv4: false
@@ -40,11 +40,11 @@ DynamicRoute:
   SaveNewPeers: true
   SuperNode:
     UseSuperNode: true
-    PSKey: yl/4SNFee7+kNekajVCrK0toqXJ4mlT4IN0klyAgyqU=
+    PSKey: Ld8FN/TNcmR21xdhMTCSeZBxrJ1z+FFvnQSnTwSxgUE=
     EndpointV4: 127.0.0.1:3456
-    PubKeyV4: 1NS6MxL2LUIlMsppJ5JfHnlofQfCxDUzaItBGwz+jBo=
+    PubKeyV4: j6+qNLYwGLILh4VKXc2fGeQy828RnRasA6zKHk3T/kw=
     EndpointV6: ""
-    PubKeyV6: gSBwlJH4aUPRfSP4ZHKAnXIkPZuVaEhsLBispLYFiwo=
+    PubKeyV6: SdrhLctYIQ7lEurGNn0ZjM8ezkPaKPCI+nAbrnwvUDA=
     EndpointEdgeAPIUrl: http://127.0.0.1:3456/eg_net/eg_api
     SkipLocalIP: false
     AdditionalLocalIP: []
@@ -62,7 +62,7 @@ DynamicRoute:
   NTPConfig:
     UseNTP: true
     MaxServerUse: 8
-    SyncTimeInterval: 3600
+    SyncTimeInterval: 99999
     NTPTimeout: 3
     Servers:
     - time.google.com
@@ -85,6 +85,13 @@ DynamicRoute:
     - 1.pool.ntp.org
     - 2.pool.ntp.org
     - 3.pool.ntp.org
+    - cn.ntp.org.cn
+    - edu.ntp.org.cn
+    - hk.ntp.org.cn
+    - tw.ntp.org.cn
+    - ntp.aliyun.com
+    - time1.cloud.tencent.com
+    - ntp.tuna.tsinghua.edu.cn
 NextHopTable: {}
 ResetEndPointInterval: 600
 Peers: []

example_config/super_mode/EgNet_edge002.yaml

@@ -3,7 +3,7 @@ Interface:
   Name: EgNet002
   VPPIFaceID: 1
   VPPBridgeID: 4242
-  MacAddrPrefix: FA:A7:11:D6
+  MacAddrPrefix: 96:BB:DC:52
   IPv4CIDR: 192.168.76.0/24
   IPv6CIDR: fd95:71cb:a3df:e586::/64
   IPv6LLPrefix: fe80::a3df:0/112
@@ -16,7 +16,7 @@ NodeName: EgNet002
 PostScript: ""
 DefaultTTL: 200
 L2FIBTimeout: 3600
-PrivKey: jDAolOiiRj/ju1xpVagZTtsxJSJba2rjp7J2XMc3yoM=
+PrivKey: r6vMkwreEkbpXoaHgdecPuWhaVK4qWlKazgQbYPDSQ4=
 ListenPort: 3002
 DisabledAf:
   IPv4: false
@@ -40,11 +40,11 @@ DynamicRoute:
   SaveNewPeers: true
   SuperNode:
     UseSuperNode: true
-    PSKey: FJfjc+wRfk0FSuUkHlXl6D8xPzOKYdy3bxeYr5cpevQ=
+    PSKey: Wmhz6SvUNBGczD0iJjHn7gUGy15ahjQsr4lKJAqDE3A=
     EndpointV4: 127.0.0.1:3456
-    PubKeyV4: 1NS6MxL2LUIlMsppJ5JfHnlofQfCxDUzaItBGwz+jBo=
+    PubKeyV4: j6+qNLYwGLILh4VKXc2fGeQy828RnRasA6zKHk3T/kw=
     EndpointV6: ""
-    PubKeyV6: gSBwlJH4aUPRfSP4ZHKAnXIkPZuVaEhsLBispLYFiwo=
+    PubKeyV6: SdrhLctYIQ7lEurGNn0ZjM8ezkPaKPCI+nAbrnwvUDA=
     EndpointEdgeAPIUrl: http://127.0.0.1:3456/eg_net/eg_api
     SkipLocalIP: false
     AdditionalLocalIP: []
@@ -62,7 +62,7 @@ DynamicRoute:
   NTPConfig:
     UseNTP: true
     MaxServerUse: 8
-    SyncTimeInterval: 3600
+    SyncTimeInterval: 99999
     NTPTimeout: 3
     Servers:
     - time.google.com
@@ -85,6 +85,13 @@ DynamicRoute:
     - 1.pool.ntp.org
     - 2.pool.ntp.org
     - 3.pool.ntp.org
+    - cn.ntp.org.cn
+    - edu.ntp.org.cn
+    - hk.ntp.org.cn
+    - tw.ntp.org.cn
+    - ntp.aliyun.com
+    - time1.cloud.tencent.com
+    - ntp.tuna.tsinghua.edu.cn
 NextHopTable: {}
 ResetEndPointInterval: 600
 Peers: []

example_config/super_mode/EgNet_edge100.yaml

@@ -3,7 +3,7 @@ Interface:
   Name: EgNet100
   VPPIFaceID: 1
   VPPBridgeID: 4242
-  MacAddrPrefix: FA:A7:11:D6
+  MacAddrPrefix: 96:BB:DC:52
   IPv4CIDR: 192.168.76.0/24
   IPv6CIDR: fd95:71cb:a3df:e586::/64
   IPv6LLPrefix: fe80::a3df:0/112
@@ -16,7 +16,7 @@ NodeName: EgNet100
 PostScript: ""
 DefaultTTL: 200
 L2FIBTimeout: 3600
-PrivKey: yNf1SkvwV8c59GmesfTNxSut6gFjYKEg9uIsE05XQUI=
+PrivKey: U68wDkoic4xviKbOed9EBykI/wgpfpHGmc8N4ML5spE=
 ListenPort: 0
 DisabledAf:
   IPv4: false
@@ -40,11 +40,11 @@ DynamicRoute:
   SaveNewPeers: true
   SuperNode:
     UseSuperNode: true
-    PSKey: 5BPLK4IX3oUd4ILQct2Xc690kkKeUd4jlyeFBkO6pHA=
+    PSKey: Ffe8veAmFX/L8lmNxbb2sofBx/K1CCY3u1osKh0sL2g=
     EndpointV4: 127.0.0.1:3456
-    PubKeyV4: 1NS6MxL2LUIlMsppJ5JfHnlofQfCxDUzaItBGwz+jBo=
+    PubKeyV4: j6+qNLYwGLILh4VKXc2fGeQy828RnRasA6zKHk3T/kw=
     EndpointV6: ""
-    PubKeyV6: gSBwlJH4aUPRfSP4ZHKAnXIkPZuVaEhsLBispLYFiwo=
+    PubKeyV6: SdrhLctYIQ7lEurGNn0ZjM8ezkPaKPCI+nAbrnwvUDA=
     EndpointEdgeAPIUrl: http://127.0.0.1:3456/eg_net/eg_api
     SkipLocalIP: false
     AdditionalLocalIP: []
@@ -62,7 +62,7 @@ DynamicRoute:
   NTPConfig:
     UseNTP: true
     MaxServerUse: 8
-    SyncTimeInterval: 3600
+    SyncTimeInterval: 99999
     NTPTimeout: 3
     Servers:
     - time.google.com
@@ -85,6 +85,13 @@ DynamicRoute:
     - 1.pool.ntp.org
     - 2.pool.ntp.org
     - 3.pool.ntp.org
+    - cn.ntp.org.cn
+    - edu.ntp.org.cn
+    - hk.ntp.org.cn
+    - tw.ntp.org.cn
+    - ntp.aliyun.com
+    - time1.cloud.tencent.com
+    - ntp.tuna.tsinghua.edu.cn
 NextHopTable: {}
 ResetEndPointInterval: 600
 Peers: []

example_config/super_mode/EgNet_super.yaml

@@ -1,7 +1,7 @@
-NodeName: EgNetSP
+NodeName: EgNetSN
 PostScript: ""
-PrivKeyV4: W4hrtkH+htbU3/zAbKLdFeflMSUoKLf741DONjnLk18=
+PrivKeyV4: vm2M7cNXbrUFORMiLvlbAxXX0l0yduo5TAJ9vyRTQZE=
-PrivKeyV6: y47AY2xGs4uiUTHfMLhxooMPu/mFOezSFQ1iZ9giW7E=
+PrivKeyV6: xUJ4yaVl/O//PRS24UFMNXgmeF/rhykroCxdJrljFgE=
 ListenPort: 3456
 ListenPort_EdgeAPI: "3456"
 ListenPort_ManageAPI: "3456"
@@ -42,28 +42,28 @@ GraphRecalculateSetting:
 NextHopTable: {}
 EdgeTemplate: EgNet_edge001.yaml
 UsePSKForInterEdge: true
-makResetEndPointInterval: 1
+ResetEndPointInterval: 600
 Peers:
 - NodeID: 1
   Name: EgNet001
-  PubKey: 6mdRv+McDgxWIq6bVB1ekxnMMWqhktzHc3JIq5bCSHI=
+  PubKey: lMiu9Qvf9qTo+X539+IxyA3YOleXMVTKtfOVHAnOIic=
-  PSKey: yl/4SNFee7+kNekajVCrK0toqXJ4mlT4IN0klyAgyqU=
+  PSKey: Ld8FN/TNcmR21xdhMTCSeZBxrJ1z+FFvnQSnTwSxgUE=
-  AdditionalCost: 10
+  AdditionalCost: 10
-  SkipLocalIP: false
+  SkipLocalIP: false
-  EndPoint: "127.0.0.1:3001"
+  EndPoint: ""
-  ExternalIP: ""
+  ExternalIP: ""
-- NodeID: 2
+- NodeID: 2
-  Name: EgNet002
+  Name: EgNet002
-  PubKey: Xb6eYSf4fTkFRLGVqf1sAPBXMKlWsRAbajs1mYABT0w=
+  PubKey: Ev271azq3FXmjhCWtwgVvqe9EN017mijjqMiB9LVQU8=
-  PSKey: FJfjc+wRfk0FSuUkHlXl6D8xPzOKYdy3bxeYr5cpevQ=
+  PSKey: Wmhz6SvUNBGczD0iJjHn7gUGy15ahjQsr4lKJAqDE3A=
-  AdditionalCost: 10
+  AdditionalCost: 10
-  SkipLocalIP: false
+  SkipLocalIP: false
-  EndPoint: "127.0.0.1:3002"
+  EndPoint: ""
-  ExternalIP: ""
+  ExternalIP: ""
-- NodeID: 100
+- NodeID: 100
-  Name: EgNet100
+  Name: EgNet100
-  PubKey: cZb8NNE1FBLy6kIUGXjdXCprUHuqzfpyXTwUxHJobnM=
+  PubKey: nL3BdnKYt+DGl783iYe/7JETVTZU31RkHQu4x49Wk0s=
-  PSKey: 5BPLK4IX3oUd4ILQct2Xc690kkKeUd4jlyeFBkO6pHA=
+  PSKey: Ffe8veAmFX/L8lmNxbb2sofBx/K1CCY3u1osKh0sL2g=
   AdditionalCost: 10
   SkipLocalIP: false
   EndPoint: ""

example_config/super_mode/gensuper.yaml

@@ -1,4 +1,6 @@
 Config output dir: /tmp/eg_gen_super
+Enable generated config overwrite: false
+Add NodeID to the interface name: true
 ConfigTemplate for super node: "" # "EgNet_super.yaml"
 ConfigTemplate for edge node: "" # "EgNet_edge001.yaml"
 Network name: EgNet

gencfg/example_conf.go

@@ -107,7 +107,7 @@ func GetExampleEdgeConf(templatePath string, getDemo bool) (mtypes.EdgeConfig, e
 			NTPConfig: mtypes.NTPInfo{
 				UseNTP:           true,
 				MaxServerUse:     8,
-				SyncTimeInterval: 604800,
+				SyncTimeInterval: 99999,
 				NTPTimeout:       3,
 				Servers: []string{
 					"time.google.com",
@@ -136,7 +136,7 @@ func GetExampleEdgeConf(templatePath string, getDemo bool) (mtypes.EdgeConfig, e
 					"tw.ntp.org.cn",
 					"ntp.aliyun.com",
 					"time1.cloud.tencent.com",
-					"ntp.tuna.tsinghua.edu.cn ",
+					"ntp.tuna.tsinghua.edu.cn",
 				},
 			},
 		},
@@ -213,7 +213,7 @@ func GetExampleSuperConf(templatePath string, getDemo bool) (mtypes.SuperConfig,
 		ListenPort_ManageAPI: "3000",
 		API_Prefix:           "/eg_api",
 		LogLevel: mtypes.LoggerInfo{
-			LogLevel:    "normal",
+			LogLevel:    "error",
 			LogTransit:  false,
 			LogControl:  true,
 			LogNormal:   false,

gencfg/gencfgNM.go

@@ -7,7 +7,6 @@ package gencfg
 
 import (
 	"fmt"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"strconv"
@@ -50,13 +49,11 @@ func GenNMCfg(NMCinfigPath string, enableP2P bool, printExample bool) (err error
 	if err != nil {
 		return err
 	}
-	files, err := os.ReadDir(NMCfg.ConfigOutputDir)
+
-	if err != nil {
+	var fileWriter bulkFileWriter
-		return err
+	fileWriter.files = make(map[string]fileWriterfile)
-	}
+	fileWriter.ow = NMCfg.ConfigOutputDirOW
-	if len(files) > 0 {
+
-		return fmt.Errorf(NMCfg.ConfigOutputDir + " not empty")
-	}
 	if NMCfg.EdgeConfigTemplate != "" {
 		var econfig mtypes.EdgeConfig
 		err = mtypes.ReadYaml(NMCfg.EdgeConfigTemplate, &econfig)
@@ -231,6 +228,8 @@ func GenNMCfg(NMCinfigPath string, enableP2P bool, printExample bool) (err error
 
 	var pskdb device.PSKDB
 	for NodeID, Edge := range edge_infos {
+		econfig.NodeName = NMCfg.NetworkName
+		econfig.Interface.Name = NMCfg.NetworkName
 		econfig.Interface.MacAddrPrefix = NMCfg.EdgeNode.MacPrefix
 		econfig.Interface.IPv4CIDR = NMCfg.EdgeNode.IPv4Range
 		econfig.Interface.IPv6CIDR = NMCfg.EdgeNode.IPv6Range
@@ -238,7 +237,10 @@ func GenNMCfg(NMCinfigPath string, enableP2P bool, printExample bool) (err error
 		econfig.PrivKey = Edge.PrivKey
 		econfig.NodeID = NodeID
 		idstr := fmt.Sprintf("%0"+strconv.Itoa(len(MaxNodeID.ToString()))+"d", NodeID)
-		econfig.NodeName = NMCfg.NetworkName + idstr
+		if NMCfg.NetworkIFNameID {
+			econfig.NodeName += idstr
+			econfig.Interface.Name += idstr
+		}
 		PersistentKeepalive := uint32(30)
 		econfig.ListenPort = 0
 		if Edge.Endpoint != "" {
@@ -263,9 +265,9 @@ func GenNMCfg(NMCinfigPath string, enableP2P bool, printExample bool) (err error
 			})
 		}
 		mtypesBytes, _ := yaml.Marshal(econfig)
-		ioutil.WriteFile(filepath.Join(NMCfg.ConfigOutputDir, NMCfg.NetworkName+"_edge"+idstr+".yaml"), mtypesBytes, 0o600)
+		fileWriter.WriteFile(filepath.Join(NMCfg.ConfigOutputDir, NMCfg.NetworkName+"_edge"+idstr+".yaml"), mtypesBytes, 0o600)
-		fmt.Println(filepath.Join(NMCfg.ConfigOutputDir, NMCfg.NetworkName+"_edge"+idstr+".yaml"))
 	}
-	return nil
+	err = fileWriter.Commit()
+	return err
 
 }

gencfg/gencfgSM.go

@@ -8,7 +8,6 @@ package gencfg
 import (
 	"bufio"
 	"fmt"
-	"io/ioutil"
 	"math"
 	"os"
 	"path/filepath"
@@ -133,13 +132,9 @@ func GenSuperCfg(SMCinfigPath string, printExample bool) (err error) {
 	if err != nil {
 		return err
 	}
-	files, err := os.ReadDir(SMCfg.ConfigOutputDir)
+	var fileWriter bulkFileWriter
-	if err != nil {
+	fileWriter.files = make(map[string]fileWriterfile)
-		return err
+	fileWriter.ow = SMCfg.ConfigOutputDirOW
-	}
-	if len(files) > 0 {
-		return fmt.Errorf(SMCfg.ConfigOutputDir + " not empty")
-	}
 
 	if SMCfg.SuperConfigTemplate != "" {
 		var sconfig mtypes.SuperConfig
@@ -198,7 +193,7 @@ func GenSuperCfg(SMCinfigPath string, printExample bool) (err error) {
 
 	EndpointEdgeAPIUrl := SMCfg.Supernode.Endpoint_EdgeAPI
 
-	sconfig.NodeName = SMCfg.NetworkName + "SP"
+	sconfig.NodeName = SMCfg.NetworkName + "SN"
 	sconfig.API_Prefix = API_Prefix
 	sconfig.ListenPort, _ = strconv.Atoi(ListenPort)
 	sconfig.ListenPort_EdgeAPI = ListenPort
@@ -268,14 +263,18 @@ func GenSuperCfg(SMCinfigPath string, printExample bool) (err error) {
 			peerceconf.DynamicRoute.SuperNode.EndpointV6 = EndpointV6 + ":" + ListenPort
 		}
 		peerceconf.DynamicRoute.SuperNode.EndpointEdgeAPIUrl = EndpointEdgeAPIUrl
+		peerceconf.NodeName = SMCfg.NetworkName
+		peerceconf.Interface.Name = SMCfg.NetworkName
+		if SMCfg.NetworkIFNameID {
+			peerceconf.NodeName += idstr
+			peerceconf.Interface.Name += idstr
+		}
 		peerceconf.Interface.MacAddrPrefix = MacPrefix
 		peerceconf.Interface.IPv4CIDR = IPv4Block
 		peerceconf.Interface.IPv6CIDR = IPv6Block
 		peerceconf.Interface.IPv6LLPrefix = IPv6LLBlock
 
 		peerceconf.NodeID = i
-		peerceconf.NodeName = SMCfg.NetworkName + idstr
-		peerceconf.Interface.Name = SMCfg.NetworkName + idstr
 		peerceconf.DynamicRoute.SuperNode.PubKeyV4 = PubKeyS4.ToString()
 		peerceconf.DynamicRoute.SuperNode.PubKeyV6 = PubKeyS6.ToString()
 		peerceconf.DynamicRoute.SuperNode.PSKey = PSKeyE.ToString()
@@ -290,12 +289,11 @@ func GenSuperCfg(SMCinfigPath string, printExample bool) (err error) {
 			SkipLocalIP:    peerceconf.DynamicRoute.SuperNode.SkipLocalIP,
 		})
 		mtypesBytes, _ := yaml.Marshal(peerceconf)
-		ioutil.WriteFile(filepath.Join(SMCfg.ConfigOutputDir, SMCfg.NetworkName+"_edge"+idstr+".yaml"), mtypesBytes, 0o600)
+		fileWriter.WriteFile(filepath.Join(SMCfg.ConfigOutputDir, SMCfg.NetworkName+"_edge"+idstr+".yaml"), mtypesBytes, 0o600)
-		fmt.Println(filepath.Join(SMCfg.ConfigOutputDir, SMCfg.NetworkName+"_edge"+idstr+".yaml"))
 	}
 	sconfig.Peers = SuperPeerInfo
 	mtypesBytes, _ := yaml.Marshal(sconfig)
-	ioutil.WriteFile(filepath.Join(SMCfg.ConfigOutputDir, SMCfg.NetworkName+"_super.yaml"), mtypesBytes, 0o600)
+	fileWriter.WriteFile(filepath.Join(SMCfg.ConfigOutputDir, SMCfg.NetworkName+"_super.yaml"), mtypesBytes, 0o600)
-	fmt.Println(filepath.Join(SMCfg.ConfigOutputDir, SMCfg.NetworkName+"_super.yaml"))
+	err = fileWriter.Commit()
-	return nil
+	return err
 }

gencfg/types.go

@@ -6,14 +6,21 @@
 package gencfg
 
 import (
+	"fmt"
+	"io/fs"
+	"io/ioutil"
+	"os"
+
 	"github.com/KusakabeSi/EtherGuard-VPN/mtypes"
 )
 
 type SMCfg struct {
 	ConfigOutputDir     string `yaml:"Config output dir"`
+	ConfigOutputDirOW   bool   `yaml:"Enable generated config overwrite"`
 	SuperConfigTemplate string `yaml:"ConfigTemplate for super node"`
 	EdgeConfigTemplate  string `yaml:"ConfigTemplate for edge node"`
 	NetworkName         string `yaml:"Network name"`
+	NetworkIFNameID     bool   `yaml:"Add NodeID to the interface name"`
 	Supernode           struct {
 		ListenPort       int    `yaml:"Listen port"`
 		EdgeAPI_Prefix   string `yaml:"EdgeAPI prefix"`
@@ -32,8 +39,10 @@ type SMCfg struct {
 
 type NMCfg struct {
 	ConfigOutputDir    string `yaml:"Config output dir"`
+	ConfigOutputDirOW  bool   `yaml:"Overwrite old configs"`
 	EdgeConfigTemplate string `yaml:"ConfigTemplate for edge node"`
 	NetworkName        string `yaml:"Network name"`
+	NetworkIFNameID    bool   `yaml:"Add NodeID to the interface name"`
 	EdgeNode           struct {
 		MacPrefix   string `yaml:"MacAddress prefix"`
 		IPv4Range   string `yaml:"IPv4 range"`
@@ -45,12 +54,53 @@ type NMCfg struct {
 }
 
 type edge_raw_info struct {
-	Endpoint            string  `yaml:"Endpoint(optional)"`
+	Endpoint string `yaml:"Endpoint(optional)"`
 }
 
 type edge_info struct {
-	Endpoint            string
+	Endpoint      string
-	ConnectedEdge       map[mtypes.Vertex]bool
+	ConnectedEdge map[mtypes.Vertex]bool
-	PrivKey             string
+	PrivKey       string
-	PubKey              string
+	PubKey        string
+}
+
+type bulkFileWriter struct {
+	files     map[string]fileWriterfile
+	committed bool
+	ow        bool
+}
+
+type fileWriterfile struct {
+	content []byte
+	perm    fs.FileMode
+}
+
+func (f *bulkFileWriter) WriteFile(path string, content []byte, perm fs.FileMode) {
+	f.files[path] = fileWriterfile{
+		content: content,
+		perm:    perm,
+	}
+}
+
+func (f *bulkFileWriter) Commit() error {
+	if f.committed {
+		return fmt.Errorf("fileWriter has been commited")
+	}
+	f.committed = true
+	for path, file := range f.files {
+		if !f.ow {
+			if _, err := os.Stat(path); os.IsNotExist(err) {
+				// path/to/whatever does not exist
+			} else {
+				return fmt.Errorf("file %v exists, overwrite disabled", path)
+			}
+		}
+
+		if err := ioutil.WriteFile(path, file.content, file.perm); err != nil {
+			return err
+		} else {
+			fmt.Println(path)
+		}
+	}
+	return nil
 }

path/ntp.go

@@ -98,11 +98,18 @@ func (g *IG) SyncTimeMultiple(count int) {
 	for _, result := range results {
 		totaltime += result
 	}
-	avgtime := totaltime / time.Duration(len(results))
+	if len(results) > 0 {
-	if g.loglevel.LogNTP {
+		avgtime := totaltime / time.Duration(len(results))
-		fmt.Println("NTP: Arvage offset: " + avgtime.String())
+		if g.loglevel.LogNTP {
+			fmt.Println("NTP: Arvage offset: " + avgtime.String())
+		}
+		g.ntp_offset = avgtime
+	} else {
+		if g.loglevel.LogNTP {
+			fmt.Println("NTP: All server failed, skip sync")
+		}
 	}
-	g.ntp_offset = avgtime
+
 }
 
 func (g *IG) SyncTime(url string, timeout time.Duration) {

version.go

@@ -1,3 +1,3 @@
 package main
 
-var Version = "v0.3.5"
+var Version = "v0.3.5-f1"