102 lines
2.1 KiB
Go
102 lines
2.1 KiB
Go
package relay
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import (
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"context"
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"net"
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"strconv"
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"time"
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"github.com/go-gost/gost/pkg/connector"
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"github.com/go-gost/gost/pkg/logger"
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md "github.com/go-gost/gost/pkg/metadata"
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"github.com/go-gost/gost/pkg/registry"
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"github.com/go-gost/relay"
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)
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func init() {
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registry.RegiserConnector("relay", NewConnector)
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}
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type relayConnector struct {
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logger logger.Logger
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md metadata
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}
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func NewConnector(opts ...connector.Option) connector.Connector {
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options := &connector.Options{}
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for _, opt := range opts {
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opt(options)
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}
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return &relayConnector{
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logger: options.Logger,
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}
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}
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func (c *relayConnector) Init(md md.Metadata) (err error) {
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return c.parseMetadata(md)
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}
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func (c *relayConnector) Connect(ctx context.Context, conn net.Conn, network, address string, opts ...connector.ConnectOption) (net.Conn, error) {
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c.logger = c.logger.WithFields(map[string]interface{}{
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"remote": conn.RemoteAddr().String(),
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"local": conn.LocalAddr().String(),
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"network": network,
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"address": address,
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})
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c.logger.Infof("connect: %s/%s", address, network)
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if c.md.connectTimeout > 0 {
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conn.SetDeadline(time.Now().Add(c.md.connectTimeout))
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defer conn.SetDeadline(time.Time{})
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}
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var udpMode bool
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if network == "udp" || network == "udp4" || network == "udp6" {
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udpMode = true
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}
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req := relay.Request{
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Version: relay.Version1,
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}
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if udpMode {
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req.Flags |= relay.FUDP
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}
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if c.md.user != nil {
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pwd, _ := c.md.user.Password()
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req.Features = append(req.Features, &relay.UserAuthFeature{
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Username: c.md.user.Username(),
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Password: pwd,
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})
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}
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if address != "" {
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host, port, _ := net.SplitHostPort(address)
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nport, _ := strconv.ParseUint(port, 10, 16)
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if host == "" {
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host = net.IPv4zero.String()
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}
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if nport > 0 {
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var atype uint8
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ip := net.ParseIP(host)
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if ip == nil {
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atype = relay.AddrDomain
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} else if ip.To4() == nil {
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atype = relay.AddrIPv6
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} else {
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atype = relay.AddrIPv4
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}
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req.Features = append(req.Features, &relay.TargetAddrFeature{
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AType: atype,
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Host: host,
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Port: uint16(nport),
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})
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}
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}
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return conn, nil
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}
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