update: setting up network

cmd/controller.go

@@ -50,7 +50,7 @@ func loadNetwork(settings *config.Config) {
     settings.IPv4.TProxyPort = v4TProxyPort
     settings.IPv6.RouteTable = v6RouteTable
     settings.IPv6.TProxyPort = v6TProxyPort
-    network.Load(settings.DNS, &settings.IPv4, &settings.IPv6, settings.Dev)
+    network.Load(settings.DNS, settings.Dev, &settings.IPv4, &settings.IPv6)
 }
 
 func loadProxy(settings *config.Config) {

cmd/network/main.go

@@ -2,8 +2,6 @@ package network
 
 import (
     "XProxy/cmd/common"
-    log "github.com/sirupsen/logrus"
-    "time"
 )
 
 type Config struct {
@@ -17,30 +15,10 @@ type Config struct {
 
 var run = common.RunCommand
 
-func Load(dns []string, ipv4 *Config, ipv6 *Config, dev string) {
+func Load(dns []string, dev string, ipv4 *Config, ipv6 *Config) {
     loadDns(dns) // init dns server
-    delay := false
-    setV4 := ipv4.Address != "" || ipv4.Gateway != ""
-    setV6 := ipv6.Address != "" || ipv6.Gateway != ""
-    if setV4 && setV6 { // clear network settings
-        delay = true
-        flushNetwork(dev)
-        loadV4Network(ipv4, dev)
-        loadV6Network(ipv6, dev)
-    } else if setV6 {
-        delay = true
-        flushV6Network(dev)
-        loadV6Network(ipv6, dev)
-    } else if setV4 {
-        flushV4Network(dev)
-        loadV4Network(ipv4, dev)
-    } else {
-        log.Infof("Skip system IP configure")
-    }
-    if delay {
-        log.Info("Wait 1s for IPv6 setting up")
-        time.Sleep(time.Second) // wait for ipv6 setting up (ND protocol) -> RA should reply less than 0.5s
-    }
+    enableIpForward()
+    loadNetwork(dev, ipv4, ipv6)
     loadV4TProxy(ipv4, getV4Cidr())
     loadV6TProxy(ipv6, getV6Cidr())
 }

cmd/network/network.go

@@ -3,9 +3,10 @@ package network
 import (
     log "github.com/sirupsen/logrus"
     "regexp"
+    "time"
 )
 
-func getV4Cidr() []string {
+func getV4Cidr() []string { // fetch ipv4 network range
     var v4Cidr []string
     _, output := run("ip", "-4", "addr")
     for _, temp := range regexp.MustCompile(`inet (\S+)`).FindAllStringSubmatch(output, -1) {
@@ -14,7 +15,7 @@ func getV4Cidr() []string {
     return v4Cidr
 }
 
-func getV6Cidr() []string {
+func getV6Cidr() []string { // fetch ipv6 network range
     var v6Cidr []string
     _, output := run("ip", "-6", "addr")
     for _, temp := range regexp.MustCompile(`inet6 (\S+)`).FindAllStringSubmatch(output, -1) {
@@ -23,31 +24,26 @@ func getV6Cidr() []string {
     return v6Cidr
 }
 
-func flushNetwork(dev string) {
-    log.Info("Flush system IP configure")
-    run("ip", "link", "set", dev, "down")
-    run("ip", "-4", "addr", "flush", "dev", dev)
-    run("ip", "-6", "addr", "flush", "dev", dev)
-    run("ip", "link", "set", dev, "up")
-}
-
-func flushV4Network(dev string) {
-    log.Info("Flush system IPv4 configure")
-    run("ip", "link", "set", dev, "down")
-    run("ip", "-4", "addr", "flush", "dev", dev)
-    run("ip", "link", "set", dev, "up")
+func enableIpForward() { // enable ip forward function
+    log.Info("Enabled IPv4 forward")
+    run("sysctl", "-w", "net.ipv4.ip_forward=1")
+    log.Info("Enabled IPv6 forward")
+    run("sysctl", "-w", "net.ipv6.conf.all.forwarding=1")
 }
 
-func flushV6Network(dev string) {
-    log.Info("Flush system IPv6 configure")
+func flushNetwork(dev string, isV4 bool, isV6 bool) { // flush ipv4 and ipv6 network
+    log.Info("Flush system IP configure")
     run("ip", "link", "set", dev, "down")
-    run("ip", "-6", "addr", "flush", "dev", dev)
+    if isV4 {
+        run("ip", "-4", "addr", "flush", "dev", dev)
+    }
+    if isV6 {
+        run("ip", "-6", "addr", "flush", "dev", dev)
+    }
     run("ip", "link", "set", dev, "up")
 }
 
-func loadV4Network(v4 *Config, dev string) {
-    log.Info("Enabled IPv4 forward")
-    run("sysctl", "-w", "net.ipv4.ip_forward=1")
+func loadV4Network(v4 *Config, dev string) { // setting up ipv4 network
     log.Info("Setting up system IPv4 configure")
     if v4.Address != "" {
         run("ip", "-4", "addr", "add", v4.Address, "dev", dev)
@@ -57,9 +53,7 @@ func loadV4Network(v4 *Config, dev string) {
     }
 }
 
-func loadV6Network(v6 *Config, dev string) {
-    log.Info("Enabled IPv6 forward")
-    run("sysctl", "-w", "net.ipv6.conf.all.forwarding=1")
+func loadV6Network(v6 *Config, dev string) { // setting up ipv6 network
     log.Info("Setting up system IPv6 configure")
     if v6.Address != "" {
         run("ip", "-6", "addr", "add", v6.Address, "dev", dev)
@@ -68,3 +62,25 @@ func loadV6Network(v6 *Config, dev string) {
         run("ip", "-6", "route", "add", "default", "via", v6.Gateway, "dev", dev)
     }
 }
+
+func loadNetwork(dev string, v4 *Config, v6 *Config) {
+    setV4 := v4.Address != "" || v4.Gateway != ""
+    setV6 := v6.Address != "" || v6.Gateway != ""
+    if setV4 && setV6 { // load both ipv4 and ipv6
+        flushNetwork(dev, true, true)
+        loadV4Network(v4, dev)
+        loadV6Network(v6, dev)
+    } else if setV4 { // only load ipv4 network
+        flushNetwork(dev, true, false)
+        loadV4Network(v4, dev)
+    } else if setV6 { // only load ipv6 network
+        flushNetwork(dev, false, true)
+        loadV6Network(v6, dev)
+    } else { // skip network settings
+        log.Infof("Skip system IP configure")
+    }
+    if setV6 {
+        log.Info("Wait 1s for IPv6 setting up")
+        time.Sleep(time.Second) // wait for ipv6 setting up (ND protocol) -> RA should reply less than 0.5s
+    }
+}

cmd/xproxy.go

@@ -35,6 +35,7 @@ func logInit(isDebug bool, logDir string) {
     if isDebug {
         log.SetLevel(log.DebugLevel)
     }
+    common.CreateFolder(logDir) // confirm log folder exist
     logFile, err := os.OpenFile(path.Join(logDir, "xproxy.log"), os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0644)
     if err != nil {
         log.Errorf("Unable to open log file -> %s", path.Join(logDir, "xproxy.log"))