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tproxy_linux.go
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tproxy_linux.go
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package v2ray_simple
import (
"go.uber.org/zap"
"net"
"github.com/e1732a364fed/v2ray_simple/netLayer"
"github.com/e1732a364fed/v2ray_simple/netLayer/tproxy"
"github.com/e1732a364fed/v2ray_simple/proxy"
"github.com/e1732a364fed/v2ray_simple/utils"
)
//非阻塞。监听透明代理
func ListenTproxy(lc proxy.LesserConf, defaultOutClientForThis proxy.Client, routePolicy *netLayer.RoutePolicy) (tm *tproxy.Machine) {
utils.Info("Start running Tproxy")
ad, err := netLayer.NewAddr(lc.Addr)
if err != nil {
panic(err)
}
//因为 tproxy比较特殊, 不属于 proxy.Server, 所以 需要 独立的 转发过程去处理.
lis, err := startLoopTCP(ad, lc, defaultOutClientForThis, &proxy.RoutingEnv{
RoutePolicy: routePolicy,
})
if err != nil {
if ce := utils.CanLogErr("TProxy startLoopTCP failed"); ce != nil {
ce.Write(zap.Error(err))
}
return
}
ad.Network = "udp"
uconn, err := ad.ListenUDP_withOpt(&netLayer.Sockopt{TProxy: true})
if err != nil {
if ce := utils.CanLogErr("TProxy startLoopUDP DialWithOpt failed"); ce != nil {
ce.Write(zap.Error(err))
}
return
}
udpConn := uconn.(*net.UDPConn)
tm = &tproxy.Machine{Addr: ad, Listener: lis, UDPConn: udpConn}
tm.Init()
go startLoopUDP(udpConn, tm, lc, defaultOutClientForThis, &proxy.RoutingEnv{
RoutePolicy: routePolicy,
})
return
}
//非阻塞
func startLoopTCP(ad netLayer.Addr, lc proxy.LesserConf, defaultOutClientForThis proxy.Client, env *proxy.RoutingEnv) (net.Listener, error) {
return netLayer.ListenAndAccept("tcp", ad.String(), &netLayer.Sockopt{TProxy: true}, 0, func(conn net.Conn) {
tcpconn := conn.(*net.TCPConn)
targetAddr := tproxy.HandshakeTCP(tcpconn)
if ce := utils.CanLogInfo("TProxy loop read got new tcp"); ce != nil {
ce.Write(zap.String("->", targetAddr.String()))
}
passToOutClient(incomingInserverConnState{
inTag: lc.Tag,
useSniffing: lc.UseSniffing,
wrappedConn: tcpconn,
defaultClient: defaultOutClientForThis,
routingEnv: env,
}, false, tcpconn, nil, targetAddr)
})
}
//阻塞
func startLoopUDP(udpConn *net.UDPConn, tm *tproxy.Machine, lc proxy.LesserConf, defaultOutClientForThis proxy.Client, env *proxy.RoutingEnv) {
for {
msgConn, raddr, err := tm.HandshakeUDP(udpConn)
if err != nil {
if ce := utils.CanLogErr("TProxy startLoopUDP loop read failed"); ce != nil {
ce.Write(zap.Error(err))
}
break
} else {
if ce := utils.CanLogInfo("TProxy loop read got new udp"); ce != nil {
ce.Write(zap.String("->", raddr.String()))
}
}
msgConn.SetFullcone(lc.Fullcone)
go passToOutClient(incomingInserverConnState{
inTag: lc.Tag,
useSniffing: lc.UseSniffing,
defaultClient: defaultOutClientForThis,
routingEnv: env,
}, false, nil, msgConn, raddr)
}
}