102 lines
2.6 KiB
Go
102 lines
2.6 KiB
Go
package proxydialer
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import (
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"context"
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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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C "github.com/Dreamacro/clash/constant"
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"github.com/Dreamacro/clash/tunnel"
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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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}
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func New(proxy C.ProxyAdapter, dialer C.Dialer) C.Dialer {
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return proxyDialer{proxy: proxy, dialer: dialer}
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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), 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, err := addrToMetadata(address)
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if 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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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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switch p.proxy.SupportWithDialer() {
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case C.ALLNet:
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fallthrough
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case C.TCP:
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return p.proxy.DialContextWithDialer(ctx, p.dialer, currentMeta)
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default: // fallback to old function
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if d, ok := p.dialer.(dialer.Dialer); ok { // fallback to old function
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return p.proxy.DialContext(ctx, currentMeta, dialer.WithOption(d.Opt))
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}
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return nil, C.ErrNotSupport
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}
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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, err := addrToMetadata(rAddrPort.String())
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if err != nil {
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return nil, err
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}
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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) (net.PacketConn, error) {
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currentMeta.NetWork = C.UDP
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switch p.proxy.SupportWithDialer() {
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case C.ALLNet:
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fallthrough
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case C.UDP:
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return p.proxy.ListenPacketWithDialer(ctx, p.dialer, currentMeta)
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default: // fallback to old function
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if d, ok := p.dialer.(dialer.Dialer); ok { // fallback to old function
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return p.proxy.ListenPacketContext(ctx, currentMeta, dialer.WithOption(d.Opt))
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}
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return nil, C.ErrNotSupport
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}
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}
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func addrToMetadata(rawAddress string) (addr *C.Metadata, err error) {
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host, port, err := net.SplitHostPort(rawAddress)
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if err != nil {
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err = fmt.Errorf("addrToMetadata failed: %w", err)
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return
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}
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if ip, err := netip.ParseAddr(host); err != nil {
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addr = &C.Metadata{
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Host: host,
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DstPort: port,
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}
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} else {
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addr = &C.Metadata{
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Host: "",
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DstIP: ip.Unmap(),
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DstPort: port,
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}
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}
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return
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}
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