mirror of
https://github.com/SagerNet/sing-box.git
synced 2024-11-12 20:03:38 +00:00
54 lines
1.3 KiB
Go
54 lines
1.3 KiB
Go
package sniff
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import (
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"context"
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"encoding/binary"
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"io"
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"os"
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"time"
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"github.com/sagernet/sing-box/adapter"
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C "github.com/sagernet/sing-box/constant"
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"github.com/sagernet/sing/common"
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"github.com/sagernet/sing/common/buf"
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"github.com/sagernet/sing/common/task"
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mDNS "github.com/miekg/dns"
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)
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func StreamDomainNameQuery(readCtx context.Context, reader io.Reader) (*adapter.InboundContext, error) {
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var length uint16
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err := binary.Read(reader, binary.BigEndian, &length)
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if err != nil {
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return nil, err
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}
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if length == 0 {
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return nil, os.ErrInvalid
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}
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_buffer := buf.StackNewSize(int(length))
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defer common.KeepAlive(_buffer)
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buffer := common.Dup(_buffer)
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defer buffer.Release()
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readCtx, cancel := context.WithTimeout(readCtx, time.Millisecond*100)
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var readTask task.Group
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readTask.Append0(func(ctx context.Context) error {
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return common.Error(buffer.ReadFullFrom(reader, buffer.FreeLen()))
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})
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err = readTask.Run(readCtx)
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cancel()
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if err != nil {
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return nil, err
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}
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return DomainNameQuery(readCtx, buffer.Bytes())
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}
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func DomainNameQuery(ctx context.Context, packet []byte) (*adapter.InboundContext, error) {
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var msg mDNS.Msg
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err := msg.Unpack(packet)
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if err != nil {
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return nil, err
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}
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return &adapter.InboundContext{Protocol: C.ProtocolDNS}, nil
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}
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