93 lines
2.7 KiB
Go
93 lines
2.7 KiB
Go
package proxydialer
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import (
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"context"
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"errors"
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"fmt"
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"net"
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"net/netip"
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"strings"
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N "github.com/Dreamacro/clash/common/net"
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"github.com/Dreamacro/clash/component/dialer"
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"github.com/Dreamacro/clash/component/resolver"
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C "github.com/Dreamacro/clash/constant"
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"github.com/Dreamacro/clash/tunnel"
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"github.com/Dreamacro/clash/tunnel/statistic"
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)
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type proxyDialer struct {
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proxy C.ProxyAdapter
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dialer C.Dialer
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statistic bool
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}
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func New(proxy C.ProxyAdapter, dialer C.Dialer, statistic bool) C.Dialer {
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return proxyDialer{proxy: proxy, dialer: dialer, statistic: statistic}
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}
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func NewByName(proxyName string, dialer C.Dialer) (C.Dialer, error) {
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proxies := tunnel.Proxies()
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if proxy, ok := proxies[proxyName]; ok {
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return New(proxy, dialer, true), nil
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}
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return nil, fmt.Errorf("proxyName[%s] not found", proxyName)
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}
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func (p proxyDialer) DialContext(ctx context.Context, network, address string) (net.Conn, error) {
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currentMeta := &C.Metadata{Type: C.INNER}
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if err := currentMeta.SetRemoteAddress(address); err != nil {
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return nil, err
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}
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if strings.Contains(network, "udp") { // using in wireguard outbound
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if !currentMeta.Resolved() {
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ip, err := resolver.ResolveIP(ctx, currentMeta.Host)
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if err != nil {
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return nil, errors.New("can't resolve ip")
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}
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currentMeta.DstIP = ip
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}
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pc, err := p.listenPacket(ctx, currentMeta)
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if err != nil {
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return nil, err
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}
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return N.NewBindPacketConn(pc, currentMeta.UDPAddr()), nil
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}
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var conn C.Conn
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var err error
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if d, ok := p.dialer.(dialer.Dialer); ok { // first using old function to let mux work
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conn, err = p.proxy.DialContext(ctx, currentMeta, dialer.WithOption(d.Opt))
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} else {
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conn, err = p.proxy.DialContextWithDialer(ctx, p.dialer, currentMeta)
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}
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if err != nil {
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return nil, err
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}
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if p.statistic {
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conn = statistic.NewTCPTracker(conn, statistic.DefaultManager, currentMeta, nil, 0, 0, false)
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}
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return conn, err
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}
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func (p proxyDialer) ListenPacket(ctx context.Context, network, address string, rAddrPort netip.AddrPort) (net.PacketConn, error) {
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currentMeta := &C.Metadata{Type: C.INNER, DstIP: rAddrPort.Addr(), DstPort: rAddrPort.Port()}
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return p.listenPacket(ctx, currentMeta)
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}
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func (p proxyDialer) listenPacket(ctx context.Context, currentMeta *C.Metadata) (C.PacketConn, error) {
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var pc C.PacketConn
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var err error
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currentMeta.NetWork = C.UDP
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if d, ok := p.dialer.(dialer.Dialer); ok { // first using old function to let mux work
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pc, err = p.proxy.ListenPacketContext(ctx, currentMeta, dialer.WithOption(d.Opt))
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} else {
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pc, err = p.proxy.ListenPacketWithDialer(ctx, p.dialer, currentMeta)
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}
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if err != nil {
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return nil, err
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}
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if p.statistic {
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pc = statistic.NewUDPTracker(pc, statistic.DefaultManager, currentMeta, nil, 0, 0, false)
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}
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return pc, nil
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}
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