62 lines
922 B
Go
62 lines
922 B
Go
package dns
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import (
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"net"
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D "github.com/miekg/dns"
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)
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var (
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address string
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server = &Server{}
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)
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type Server struct {
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*D.Server
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r *Resolver
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}
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func (s *Server) ServeDNS(w D.ResponseWriter, r *D.Msg) {
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msg, err := s.r.Exchange(r)
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if err != nil {
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D.HandleFailed(w, r)
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return
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}
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msg.SetReply(r)
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w.WriteMsg(msg)
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}
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func ReCreateServer(addr string, resolver *Resolver) error {
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if server.Server != nil {
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server.Shutdown()
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}
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if addr == address {
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return nil
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}
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_, port, err := net.SplitHostPort(addr)
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if port == "0" || port == "" || err != nil {
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return nil
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}
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udpAddr, err := net.ResolveUDPAddr("udp", addr)
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if err != nil {
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return err
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}
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p, err := net.ListenUDP("udp", udpAddr)
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if err != nil {
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return err
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}
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address = addr
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server = &Server{r: resolver}
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server.Server = &D.Server{Addr: addr, PacketConn: p, Handler: server}
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go func() {
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server.ActivateAndServe()
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}()
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return nil
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}
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