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tailscale/net
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Brad Fitzpatrick 0e10a3f580 net/tsdial, ipn/localapi, client/local: let clients dial non-Tailscale addresses directly 
Add a tsdial.Dialer.UserDialPlan method that resolves an address and
reports whether the dialer would route it via Tailscale. The LocalAPI
/dial handler now uses this to skip proxying for addresses that aren't
Tailscale routes (e.g. localhost), returning a Dial-Self response with
the resolved address so the client can dial it directly. This avoids
an unnecessary round-trip through the daemon for local connections.

The client's UserDial handles the new response by dialing the resolved
address itself, and the server passes the pre-resolved IP:port for
Tailscale dials to avoid redundant DNS lookups.

Thanks to giacomo and Moyao for pointing this out!

Updates tailscale/corp#39702

Change-Id: I78d640f11ccd92f43ddd505cbb0db8fee19f43a6
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2026-04-27 09:33:27 -07:00
..
ace all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00
art all: use Go 1.26 things, run most gofix modernizers 2026-03-06 13:32:03 -08:00
bakedroots all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00
batching cmd/vet: add subtestnames analyzer; fix all existing violations 2026-04-05 15:52:51 -07:00
captivedetection all: use Go 1.26 things, run most gofix modernizers 2026-03-06 13:32:03 -08:00
connectproxy all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00
dns cmd/cloner: deep-clone pointer elements in map-of-slice values 2026-04-17 11:36:05 -04:00
dnscache all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00
dnsfallback all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00
flowtrack all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00
ipset all: use bart.Lite instead of bart.Table where appropriate 2026-03-24 14:45:23 +00:00
ktimeout all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00
memnet all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00
netaddr all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00
netcheck cmd/vet: add subtestnames analyzer; fix all existing violations 2026-04-05 15:52:51 -07:00
neterror all: use Go 1.26 things, run most gofix modernizers 2026-03-06 13:32:03 -08:00
netkernelconf all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00
netknob all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00
netmon ipn/ipnlocal,net/netmon: make frequent darkwake more efficient 2026-04-06 15:46:51 -07:00
netns netns: add Android callback to bind socket to network (#18915) 2026-03-11 12:28:28 -07:00
netstat all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00
netutil all: use Go 1.26 things, run most gofix modernizers 2026-03-06 13:32:03 -08:00
netx all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00
packet net,tsnet: fix the capitalisation of "Wireshark" 2026-03-26 19:39:29 +00:00
ping all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00
portmapper all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00
porttrack net/porttrack: change magic listen address format for Go 1.26 2026-03-04 21:57:05 -08:00
proxymux all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00
routetable netns,wgengine: add OpenBSD support to netns via an rtable 2026-02-25 12:44:32 -08:00
sockopts all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00
socks5 all: use Go 1.26 things, run most gofix modernizers 2026-03-06 13:32:03 -08:00
sockstats all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00
speedtest cmd/vet: add subtestnames analyzer; fix all existing violations 2026-04-05 15:52:51 -07:00
stun cmd/vet: add subtestnames analyzer; fix all existing violations 2026-04-05 15:52:51 -07:00
stunserver all: use Go 1.26 things, run most gofix modernizers 2026-03-06 13:32:03 -08:00
tcpinfo all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00
tlsdial tsd, all: add Sys.ExtraRootCAs, plumb through TLS dial paths 2026-04-07 18:10:54 -07:00
tsaddr all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00
tsdial net/tsdial, ipn/localapi, client/local: let clients dial non-Tailscale addresses directly 2026-04-27 09:33:27 -07:00
tshttpproxy cmd/vet: add subtestnames analyzer; fix all existing violations 2026-04-05 15:52:51 -07:00
tstun tailcfg,ipn/ipnlocal: regulate netmap caching via a node attribute (#19117) 2026-04-01 15:02:53 -07:00
udprelay cmd/vet: add subtestnames analyzer; fix all existing violations 2026-04-05 15:52:51 -07:00
wsconn all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00