dns/fuzz.go

   1 //go:build gofuzz
   2 // +build gofuzz
   3
   4 // Fuzzing driver for https://github.com/dvyukov/go-fuzz.
   5 //      go get -u github.com/dvyukov/go-fuzz/go-fuzz github.com/dvyukov/go-fuzz/go-fuzz-build
   6 //      $GOPATH/bin/go-fuzz-build
   7 //      $GOPATH/bin/go-fuzz
   8 //
   9 // Related link: https://blog.cloudflare.com/dns-parser-meet-go-fuzzer/
  10
  11 package dns
  12
  13 func Fuzz(data []byte) int {
  14         msg, err := MessageFromWireFormat(data)
  15         if err != nil {
  16                 return 0
  17         }
  18         _, err = msg.WireFormat()
  19         if err != nil {
  20                 panic(err)
  21         }
  22         return 1 // prioritize this input
  23 }