pancap/protocol/dns/dns.go

39 lines
1.0 KiB
Go

package dns
import (
"git.darknebu.la/maride/pancap/output"
"github.com/google/gopacket"
"github.com/google/gopacket/layers"
)
type Protocol struct {}
func (p *Protocol) CanAnalyze(packet gopacket.Packet) bool {
return packet.Layer(layers.LayerTypeDNS) != nil
}
// Analyzes the given DHCP packet
func (p *Protocol) Analyze(packet gopacket.Packet) error {
var dnspacket layers.DNS
// Decode raw packet into DNS
decodeErr := dnspacket.DecodeFromBytes(packet.ApplicationLayer().LayerContents(), gopacket.NilDecodeFeedback)
if decodeErr != nil {
// Encountered an error during decoding, most likely a broken packet
return decodeErr
}
// Further process the packet
p.processDNSQuestion(dnspacket.Questions)
p.processDNSAnswer(dnspacket.Answers)
// No error encountered, return clean
return nil
}
// Print a summary after all DNS packets were processed
func (p *Protocol) PrintSummary() {
output.PrintBlock("DNS Request Summary", p.generateDNSQuestionSummary())
output.PrintBlock("DNS Response Summary", p.generateDNSAnswerSummary())
}