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Ian Lance Taylor f14ad78e84 net: send EDNS(0) packet length in DNS query
We used to only accept up to 512 bytes in a DNS packet, per RFC 1035.
Increase the size we accept to 1232 bytes, per https://dnsflagday.net/2020/,
and advertise that larger limit in a EDNS(0) OPT record.

Fixes #6464
Fixes #21160
Fixes #44135
Fixes #51127

Change-Id: I496a294e9a8015de4161cbc1825b0dc5b4e9f5d8
Reviewed-on: https://go-review.googlesource.com/c/go/+/385035
Trust: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
2022-02-12 05:44:16 +00:00
.github .github: remove duplicate security link 2022-01-07 17:55:09 +00:00
api runtime/debug: replace (*BuildInfo).Marshal methods with Parse and String 2022-02-09 19:44:03 +00:00
doc spec: combine section on type parameters and type parameter lists 2022-02-11 16:26:49 +00:00
lib/time lib/time, time/tzdata: update to 2021e 2021-11-11 05:16:39 +00:00
misc misc/reboot: don't use symlinks when copying GOROOT/src 2022-02-08 15:30:12 +00:00
src net: send EDNS(0) packet length in DNS query 2022-02-12 05:44:16 +00:00
test go/types, types2: better error message for invalid array length 2022-02-11 22:01:05 +00:00
.gitattributes all: treat all files as binary, but check in .bat with CRLF 2020-06-08 15:31:43 +00:00
.gitignore internal/buildcfg: move build configuration out of cmd/internal/objabi 2021-04-16 19:20:53 +00:00
AUTHORS A+C: add Bharath Kumar Uppala (individual CLA) 2021-11-29 00:57:09 +00:00
codereview.cfg codereview.cfg: add codereview.cfg for master branch 2021-02-19 18:44:53 +00:00
CONTRIBUTING.md all: restore changes from faulty merge/revert 2018-02-12 20:13:59 +00:00
CONTRIBUTORS A+C: add Bharath Kumar Uppala (individual CLA) 2021-11-29 00:57:09 +00:00
LICENSE
PATENTS
README.md README.md: update contribute URL 2021-09-30 13:33:21 +00:00
SECURITY.md SECURITY.md: update go versions 2019-09-26 15:34:57 +00:00

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