mirror of
https://github.com/bettercap/bettercap
synced 2025-07-11 15:46:59 -07:00
29 lines
701 B
Go
29 lines
701 B
Go
package packets
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import (
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"github.com/google/gopacket"
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"github.com/google/gopacket/layers"
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"github.com/miekg/dns"
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)
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const MDNSPort = 5353
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func MDNSGetHostname(pkt gopacket.Packet) string {
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if ludp := pkt.Layer(layers.LayerTypeUDP); ludp != nil {
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if udp := ludp.(*layers.UDP); udp != nil && udp.SrcPort == MDNSPort && udp.DstPort == MDNSPort {
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var msg dns.Msg
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if err := msg.Unpack(udp.Payload); err == nil && msg.Opcode == dns.OpcodeQuery && len(msg.Answer) > 0 {
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for _, answer := range append(msg.Answer, msg.Extra...) {
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switch rr := answer.(type) {
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case *dns.PTR:
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case *dns.A:
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case *dns.AAAA:
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return rr.Header().Name
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}
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}
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}
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}
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}
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return ""
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}
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