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tailscale/net/dns/resolver
Brad Fitzpatrick 236eb4d04d net/dns/resolver: upgrade forwarded MagicDNS queries to DoH when IP known
Recognize Cloudflare, Google, Quad9 which are by far the
majority of upstream DNS servers that people use.

RELNOTE=MagicDNS now uses DNS-over-HTTPS when querying popular upstream resolvers,
so DNS queries aren't sent in the clear over the Internet.

Updates #915 (might fix it?)
Updates #988 (gets us closer, if it fixes Android)
Updates #74 (not yet configurable, but progress)
Updates #2056 (not yet configurable, dup of #74?)

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
..
doh_test.go net/dns/resolver: upgrade forwarded MagicDNS queries to DoH when IP known 4 years ago
forwarder.go net/dns/resolver: upgrade forwarded MagicDNS queries to DoH when IP known 4 years ago
macios_ext.go net/dns{,/resolver}: refactor DNS forwarder, send out of right link on macOS/iOS 5 years ago
neterr_darwin.go net/dns/resolver: permit larger max responses, signal truncation 5 years ago
neterr_other.go net/dns/resolver: fmt item 5 years ago
neterr_windows.go net/dns/resolver: permit larger max responses, signal truncation 5 years ago
tsdns.go net/dns{,/resolver}: refactor DNS forwarder, send out of right link on macOS/iOS 5 years ago
tsdns_server_test.go net/dns/resolver: clamp EDNS size 5 years ago
tsdns_test.go net/dns/resolver: clamp EDNS size 5 years ago