95 lines
1.9 KiB
Go
95 lines
1.9 KiB
Go
package fakeip
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import (
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"context"
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"net/netip"
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"os"
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"github.com/sagernet/sing-box/adapter"
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"github.com/sagernet/sing-dns"
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E "github.com/sagernet/sing/common/exceptions"
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"github.com/sagernet/sing/common/logger"
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mDNS "github.com/miekg/dns"
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)
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var (
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_ dns.Transport = (*Transport)(nil)
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_ adapter.FakeIPTransport = (*Transport)(nil)
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)
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func init() {
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dns.RegisterTransport([]string{"fakeip"}, func(options dns.TransportOptions) (dns.Transport, error) {
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return NewTransport(options)
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})
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}
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type Transport struct {
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name string
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router adapter.Router
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store adapter.FakeIPStore
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logger logger.ContextLogger
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}
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func NewTransport(options dns.TransportOptions) (*Transport, error) {
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router := adapter.RouterFromContext(options.Context)
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if router == nil {
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return nil, E.New("missing router in context")
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}
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return &Transport{
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name: options.Name,
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router: router,
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logger: options.Logger,
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}, nil
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}
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func (s *Transport) Name() string {
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return s.name
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}
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func (s *Transport) Start() error {
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s.store = s.router.FakeIPStore()
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if s.store == nil {
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return E.New("fakeip not enabled")
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}
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return nil
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}
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func (s *Transport) Reset() {
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}
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func (s *Transport) Close() error {
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return nil
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}
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func (s *Transport) Raw() bool {
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return false
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}
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func (s *Transport) Exchange(ctx context.Context, message *mDNS.Msg) (*mDNS.Msg, error) {
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return nil, os.ErrInvalid
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}
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func (s *Transport) Lookup(ctx context.Context, domain string, strategy dns.DomainStrategy) ([]netip.Addr, error) {
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var addresses []netip.Addr
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if strategy != dns.DomainStrategyUseIPv6 {
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inet4Address, err := s.store.Create(domain, false)
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if err != nil {
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return nil, err
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}
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addresses = append(addresses, inet4Address)
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}
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if strategy != dns.DomainStrategyUseIPv4 {
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inet6Address, err := s.store.Create(domain, true)
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if err != nil {
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return nil, err
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}
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addresses = append(addresses, inet6Address)
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}
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return addresses, nil
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}
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func (s *Transport) Store() adapter.FakeIPStore {
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return s.store
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}
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