72 lines
1.7 KiB
Go
72 lines
1.7 KiB
Go
package main
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import (
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"dns"
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"flag"
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"fmt"
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"os"
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"strconv"
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)
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func q(w dns.RequestWriter, m *dns.Msg) {
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w.Send(m)
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r, err := w.Receive()
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if err != nil {
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fmt.Printf("%s\n", err.Error())
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}
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w.Write(r)
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}
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func main() {
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port := flag.Int("port", 53, "port number to use")
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report := flag.Bool("report", false, "show fingerprint for (yet) unknown server")
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flag.Usage = func() {
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fmt.Fprintf(os.Stderr, "Usage: %s [OPTIONS...] [@server]\n", os.Args[0])
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flag.PrintDefaults()
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}
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conf, _ := dns.ClientConfigFromFile("/etc/resolv.conf")
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nameserver := "@" + conf.Servers[0]
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flag.Parse()
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for i := 0; i < flag.NArg(); i++ {
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// If it starts with @ it is a nameserver
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if flag.Arg(i)[0] == '@' {
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nameserver = flag.Arg(i)
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break
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}
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}
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nameserver = string([]byte(nameserver)[1:]) // chop off @
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nameserver += ":" + strconv.Itoa(*port)
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c := dns.NewClient()
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prints, _ := fingerPrintFromFile("data/q")
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results := make([]*fingerprint, 0)
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if *report {
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fmt.Printf("# Fingerprint of <Nameserver> <version>\n# Supplied by <Name> on <Date>\n#\n")
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}
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for _, f := range prints {
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f1 := probe(c, nameserver, f)
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results = append(results, f1)
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if *report {
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fmt.Printf("#%s\n%s\n", f.String(), f1.String())
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}
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}
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if *report {
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return
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}
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// For now, just list them:
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files := []string{"Atlas", "Bind8", "Bind9", "MaraDNS", "Microsoft", "Nsd3", "PowerDNS"}
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fmt.Printf("%s\t%s\t%s\t\t\t\t\t\t\t\t%s\n", "Server type", "Diffs", "Fingerprint", "Recevied")
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for _, file := range files {
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diff := 0
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prints, _ := fingerPrintFromFile("data/" + file)
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for i, f := range prints {
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d := f.compare(results[i])
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diff += d
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fmt.Printf("%s\t%d %s %s\n", file, d, f.String(), results[i].String())
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}
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fmt.Printf("\t\t=\nDifferences:\t%d\n\n", diff)
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}
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}
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