mirror of
https://github.com/daeuniverse/dae.git
synced 2025-01-19 00:38:18 +07:00
120 lines
3.4 KiB
Go
120 lines
3.4 KiB
Go
/*
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* SPDX-License-Identifier: AGPL-3.0-only
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* Copyright (c) since 2022, v2rayA Organization <team@v2raya.org>
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*/
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package control
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import (
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"fmt"
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"github.com/mzz2017/softwind/pkg/zeroalloc/io"
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"github.com/sirupsen/logrus"
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"github.com/v2rayA/dae/common"
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"github.com/v2rayA/dae/common/consts"
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"github.com/v2rayA/dae/component/outbound/dialer"
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internal "github.com/v2rayA/dae/pkg/ebpf_internal"
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"golang.org/x/sys/unix"
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"net"
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"net/netip"
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"strings"
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"time"
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)
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func (c *ControlPlane) handleConn(lConn net.Conn) (err error) {
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defer lConn.Close()
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src := lConn.RemoteAddr().(*net.TCPAddr).AddrPort()
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dst := lConn.LocalAddr().(*net.TCPAddr).AddrPort()
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outboundIndex, err := c.core.RetrieveOutboundIndex(src, dst, unix.IPPROTO_TCP)
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if err != nil {
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// WAN. Old method.
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var value bpfIpPortOutbound
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ip6 := src.Addr().As16()
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if e := c.core.bpf.TcpDstMap.Lookup(bpfIpPort{
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Ip: struct{ U6Addr8 [16]uint8 }{U6Addr8: ip6},
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Port: internal.Htons(src.Port()),
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}, &value); e != nil {
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return fmt.Errorf("failed to retrieve target info %v: %v, %v", src.String(), err, e)
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}
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outboundIndex = consts.OutboundIndex(value.Outbound)
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dstAddr, ok := netip.AddrFromSlice(common.Ipv6Uint32ArrayToByteSlice(value.Ip))
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if !ok {
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return fmt.Errorf("failed to parse dest ip: %v", value.Ip)
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}
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dst = netip.AddrPortFrom(dstAddr, internal.Htons(value.Port))
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}
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switch outboundIndex {
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case consts.OutboundDirect:
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case consts.OutboundMustDirect:
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fallthrough
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case consts.OutboundControlPlaneDirect:
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c.log.Tracef("outbound: %v => %v",
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outboundIndex.String(),
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consts.OutboundDirect.String(),
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)
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outboundIndex = consts.OutboundDirect
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default:
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}
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outbound := c.outbounds[outboundIndex]
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// TODO: Set-up ip to domain mapping and show domain if possible.
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if outboundIndex < 0 || int(outboundIndex) >= len(c.outbounds) {
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return fmt.Errorf("outbound id from bpf is out of range: %v not in [0, %v]", outboundIndex, len(c.outbounds)-1)
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}
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networkType := &dialer.NetworkType{
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L4Proto: consts.L4ProtoStr_TCP,
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IpVersion: consts.IpVersionFromAddr(dst.Addr()),
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IsDns: false,
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}
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d, _, err := outbound.Select(networkType)
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if err != nil {
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return fmt.Errorf("failed to select dialer from group %v (%v): %w", outbound.Name, networkType.String(), err)
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}
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c.log.WithFields(logrus.Fields{
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"network": networkType.String(),
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"outbound": outbound.Name,
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"dialer": d.Name(),
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}).Infof("%v <-> %v", RefineSourceToShow(src, dst.Addr()), RefineAddrPortToShow(dst))
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rConn, err := d.Dial("tcp", dst.String())
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if err != nil {
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return fmt.Errorf("failed to dial %v: %w", dst, err)
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}
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defer rConn.Close()
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if err = RelayTCP(lConn, rConn); err != nil {
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switch {
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case strings.HasSuffix(err.Error(), "write: broken pipe"),
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strings.HasSuffix(err.Error(), "i/o timeout"):
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return nil // ignore
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default:
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return fmt.Errorf("handleTCP relay error: %w", err)
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}
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}
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return nil
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}
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type WriteCloser interface {
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CloseWrite() error
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}
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func RelayTCP(lConn, rConn net.Conn) (err error) {
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eCh := make(chan error, 1)
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go func() {
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_, e := io.Copy(rConn, lConn)
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if rConn, ok := rConn.(WriteCloser); ok {
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rConn.CloseWrite()
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}
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rConn.SetReadDeadline(time.Now().Add(10 * time.Second))
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eCh <- e
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}()
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_, e := io.Copy(lConn, rConn)
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if lConn, ok := lConn.(WriteCloser); ok {
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lConn.CloseWrite()
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}
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lConn.SetReadDeadline(time.Now().Add(10 * time.Second))
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if e != nil {
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<-eCh
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return e
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}
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return <-eCh
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}
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