mirror of
https://github.com/e1732a364fed/v2ray_simple.git
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126 lines
3.2 KiB
Go
126 lines
3.2 KiB
Go
package tun
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import (
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"github.com/e1732a364fed/v2ray_simple/netLayer"
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"github.com/e1732a364fed/v2ray_simple/utils"
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"go.uber.org/zap"
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)
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func init() {
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//https://github.com/xjasonlyu/tun2socks/wiki/Examples
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//通过下面命令可以看到 建立的tun设备
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//ip addr show
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//通过下面命令查看路由
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//ip route show
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autoRoutePreFunc = func(tunDevName, tunGateway, tunIP string, directList []string) bool {
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if len(directList) == 0 {
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utils.Warn(auto_route_bindToDeviceWarn)
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}
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utils.Info("tun auto setup device for linux...")
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e := utils.ExecCmd("ip tuntap add mode tun dev " + tunDevName)
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if e != nil {
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return false
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}
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//todo: 还是要使用mask变量，以便定制这里的 "15"
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e = utils.ExecCmd("ip addr add " + tunGateway + "/15 dev " + tunDevName)
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if e != nil {
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return false
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}
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e = utils.ExecCmd("ip link set dev " + tunDevName + " up")
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if e != nil {
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return false
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}
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return true
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}
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autoRouteFunc = func(tunDevName, tunGateway, tunIP string, directList []string) {
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routerip, routerName, err := netLayer.GetGateway()
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if err != nil {
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utils.Error(err.Error())
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}
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if routerip == nil || len(routerip) == 0 {
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utils.Error("got router ip but is nil / emtpy")
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return
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}
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rememberedRouterName = routerName
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rememberedRouterIP = routerip.String()
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var strs = []string{
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"ip route del default",
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"ip route add default via " + tunGateway + " dev " + tunDevName + " metric 1",
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"ip route add default via " + rememberedRouterIP + " dev " + routerName + " metric 10",
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}
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//上面命令指定了不同 设备要走不同的网关，并且后面要用到 bindToDevice 功能来让 dial 走 原网卡
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// 这个 bindToDevice 要用户自己配置
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//有了 bindToDevice, linux 就不怕造成回环
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for _, v := range directList {
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strs = append(strs, "ip route add "+v+" via "+rememberedRouterIP+" dev "+routerName+" metric 10")
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}
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if manualRoute {
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promptManual(strs)
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} else {
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if e := utils.ExecCmdList(strs); e != nil {
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if ce := utils.CanLogErr("run auto route failed"); ce != nil {
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ce.Write(zap.Error(e))
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}
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}
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}
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}
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autoRouteDownFunc = func(tunDevName, tunGateway, tunIP string, directList []string) {
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if rememberedRouterIP == "" || rememberedRouterName == "" {
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return
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}
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var strs = []string{
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//经测试，tun设备被关闭后，相关路由应该自动就恢复了
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//"ip route del default",
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//"ip route add default via " + rememberedRouterIP,
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"ip link set dev " + tunDevName + " down",
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}
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for _, v := range directList {
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strs = append(strs, "ip route del "+v+" via "+rememberedRouterIP+" dev "+rememberedRouterName+" metric 10")
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}
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if manualRoute {
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promptManual(strs)
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} else {
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if e := utils.LogExecCmdList(strs); e != nil {
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if ce := utils.CanLogErr("recover auto route failed"); ce != nil {
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ce.Write(zap.Error(e))
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}
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return
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}
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}
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}
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autoRouteDownAfterCloseFunc = func(tunDevName, tunGateway, tunIP string, directlist []string) {
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if _, e := utils.LogRunCmd("ip", "tuntap", "del", "mode", "tun", "dev", tunDevName); e != nil {
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if ce := utils.CanLogErr("recover auto route after close failed"); ce != nil {
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ce.Write(zap.Error(e))
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}
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return
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}
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}
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}
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