dns/dnsmessage: reject packing of 255B rooted names, reject unpacking of 256B (dns encoded) names

Packing a 255B (rooted) name will create an 256B (dns encoded) name, which is an invalid name. Similar with unpacking, we can't unpack 256B (dns encoded) name, because it is too long.

Change-Id: I17cc93a93a17a879a2a789629e56ad39999da9ac
GitHub-Last-Rev: ddf151af6c650160f2583f66c07d41ed18c7ae5e
GitHub-Pull-Request: golang/net#156
Reviewed-on: https://go-review.googlesource.com/c/net/+/448156
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Reviewed-by: Damien Neil <dneil@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Mateusz Poliwczak <mpoliwczak34@gmail.com>
2 files changed
tree: aad31d4dd17c1c3c62e614d686f3c73d7e9ac92f
  1. bpf/
  2. context/
  3. dict/
  4. dns/
  5. html/
  6. http/
  7. http2/
  8. icmp/
  9. idna/
  10. internal/
  11. ipv4/
  12. ipv6/
  13. lif/
  14. nettest/
  15. netutil/
  16. proxy/
  17. publicsuffix/
  18. route/
  19. trace/
  20. webdav/
  21. websocket/
  22. xsrftoken/
  23. .gitattributes
  24. .gitignore
  25. codereview.cfg
  26. CONTRIBUTING.md
  27. go.mod
  28. go.sum
  29. LICENSE
  30. PATENTS
  31. README.md
README.md

Go Networking

Go Reference

This repository holds supplementary Go networking libraries.

Download/Install

The easiest way to install is to run go get -u golang.org/x/net. You can also manually git clone the repository to $GOPATH/src/golang.org/x/net.

Report Issues / Send Patches

This repository uses Gerrit for code changes. To learn how to submit changes to this repository, see https://golang.org/doc/contribute.html. The main issue tracker for the net repository is located at https://github.com/golang/go/issues. Prefix your issue with “x/net:” in the subject line, so it is easy to find.