tailscale

Commit Graph

Author	SHA1	Message	Date
Brad Fitzpatrick	f2041c9088	all: use strings.Cut even more Change-Id: I943ce72c6f339589235bddbe10d07799c4e37979 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Josh Bleecher Snyder	0868329936	all: use any instead of interface{} My favorite part of generics. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Brad Fitzpatrick	61ee72940c	all: use Go 1.18's strings.Cut More remain. Change-Id: I6ec562cc1f687600758deae1c9d7dbd0d04004cb Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Josh Bleecher Snyder	0ef74f37a5	net/dns/resolver: remove closure allocation explanation As of Go 1.18, the register ABI list includes arm64, amd64, ppc64, and ppc64le. This is a large enough percentage of the architectures that it's not worth explaining. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Brad Fitzpatrick	7d897229d9	net/dns: ignore permission errors on Synology DSM7 for now Updates #4017 Change-Id: Ia7fd4df47588c010dea8e63d88f397cc8eb748e5 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	2ff481ff10	net/dns: add health check for particular broken-ish Linux DNS config Updates #3937 (need to write docs before closing) Change-Id: I1df7244cfbb0303481e2621ee750d21358bd67c6 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	c988bd6ed1	net/dns/resolvconffile: unify three /etc/resolv.conf parsers into new package Change-Id: I2120893ca802d12f1bd0407d49077d3672627d33 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	21358cf2f5	net/dns: slightly optimize dbusPing for non-dbus case [Linux] Avoid some work when D-Bus isn't running. Change-Id: I6f89bb75fdb24c13f61be9b400610772756db1ef Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	37e7a387ff	net/dns: remove some unused code for detecting systemd-resolved [Linux] Change-Id: I19c5fd2cdacfb9e5b688ccd9b4336ae4edffc445 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	15599323a1	net/dns: fix systemd-resolved detection race at boot If systemd-resolved is enabled but not running (or not yet running, such as early boot) and resolv.conf is old/dangling, we weren't detecting systemd-resolved. This moves its ping earlier, which will trigger it to start up and write its file. Updates #3362 (likely fixes) Updates #3531 (likely fixes) Change-Id: I6392944ac59f600571c43b8f7a677df224f2beed Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Denton Gentry	dbea8217ac	net/dns: add NetworkManager regression test Use the exact /etc/resolv.conf file from a user report. Updates https://github.com/tailscale/tailscale/issues/3531 Signed-off-by: Denton Gentry <dgentry@tailscale.com>	3 years ago
Aaron Bieber	e5cd765e00	net/dns/resolvd: properly handle not having "search" entries This prevents adding an empty "search" line when no search domains are set. Signed-off-by: Aaron Bieber <aaron@bolddaemon.com>	3 years ago
Brad Fitzpatrick	41fd4eab5c	envknob: add new package for all the strconv.ParseBool(os.Getenv(..)) A new package can also later record/report which knobs are checked and set. It also makes the code cleaner & easier to grep for env knobs. Change-Id: Id8a123ab7539f1fadbd27e0cbeac79c2e4f09751 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	6feb8f4c51	net/dns: log why resolved does not look like it's on use [Linux] Updates #3742 Updates #3531 Change-Id: I9fc7fa0f4bcab1cf8001ba92408c660a5b25f105 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Aaron Bieber	411c6c316c	net/dns/resolvd: store nameservers Currently only search domains are stored. This was an oversight (under?) on my part. As things are now, when MagicDNS is on and "Override local DNS" is off, the dns forwarder has to timeout before names resolve. This introduces a pretty annoying lang that makes everything feel extremely slow. You will also see an error: "upstream nameservers not set". I tested with "Override local DNS" on and off. In both situations things seem to function as expected (and quickly). Signed-off-by: Aaron Bieber <aaron@bolddaemon.com>	3 years ago
Brad Fitzpatrick	24a04d07d1	net/dns/resolver: handle tabs as whitespace when ExitDNS parses resolv.conf On Synology, the /etc/resolv.conf has tabs in it, which this resolv.conf parser (we have two, sigh) didn't handle. Updates #3710 Change-Id: I86f8e09ad1867ee32fa211e85c382a27191418ea Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	8df3fa4638	net/dns: make WSL network configuration opt-in for now Tailscale seems to be breaking WSL configurations lately. Until we understand what changed, turn off Tailscale's involvement by default and make it opt-in. Updates #2815 Change-Id: I9977801f8debec7d489d97761f74000a4a33f71b Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Aaron Bieber	189f359609	net/dns: teach OpenBSD's manager to talk to resolvd(8). (#2789 ) OpenBSD 6.9 and up has a daemon which handles nameserver configuration. This PR teaches the OpenBSD dns manager to check if resolvd is being used. If it is, it will use the route(8) command to tell resolvd to add the Tailscale dns entries to resolv.conf Signed-off-by: Aaron Bieber <aaron@bolddaemon.com>	3 years ago
Brad Fitzpatrick	8d0ed1c9ba	net/dns/resolver: on Android, make ExitDNS use net package for DNS Like Windows. Updates #1738 Change-Id: I9f26bc58ce7e760c749786fbe5d9952c99eeb91c Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	506c727e30	ipnlocal, net/{dns,tsaddr,tstun}, wgengine: support MagicDNS on IPv6 Fixes #3660 RELNOTE=MagicDNS now works over IPv6 when CGNAT IPv4 is disabled. Change-Id: I001e983df5feeb65289abe5012dedd177b841b45 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	2513d2d728	net/{neterror,dns/resolver}: move PacketWasTruncated to neterror from DNS code And delete the unused code in net/dns/resolver/neterr_*.go. Change-Id: Ibe62c486bacce2733eb9968c96a98cbbdb2758bd Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	eb26c081b1	net/dns: bound time we wait on restarting systemd-resolved in another place Fixes #3629 Updates #3537 Change-Id: I5d4b6acfcfdf0e3efcf6eb49c5e6cf4521e4baed Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	0aa4c6f147	net/dns/resolver: add debug HTML handler to see what DNS traffic was forwarded Change-Id: I6b790e92dcc608515ac8b178f2271adc9fd98f78 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	0848b36dd2	net/dns/resolver: add metrics to PTR lookup misses Updates tailscale/corp#3326 Change-Id: I58077d889a3b58ef0633267c92ffb265686ce152 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	39f22a357d	net/dns/resolver: send NXDOMAIN to iOS DNS-SD/Bonjour queries Don't just ignore them. See if this makes them calm down. Updates #3363 Change-Id: Id1d66308e26660d26719b2538b577522a1e36b63 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	394c9de02b	net/dns/resolver: add nameFromQuery benchmark To convince me it's not as alloc-y as it looks. Change-Id: I503a0cc267268a23d2973dfde9833c420be4e868 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	c7052154d5	net/dns/resolver: fix the subject in a func comment Change-Id: I519268c20dbd2c2da92da565839d3c1c84612dcc Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	486059589b	all: gofmt -w -s (simplify) tests And it updates the build tag style on a couple files. Change-Id: I84478d822c8de3f84b56fa1176c99d2ea5083237 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	cced414c7d	net/dns/resolver: add Windows ExitDNS service support, using net package Updates #1713 Updates #835 Change-Id: Ia71e96d0632c2d617b401695ad68301b07c1c2ec Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	cab5c46481	net/dns: bound how long we block looking for, restarting systemd-resolved Fixes #3537 Change-Id: Iba6a3cde75983490d4072b5341f48dbfa2f997c0 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	c37af58ea4	net/tsdial: move more weirdo dialing into new tsdial package, plumb Not done yet, but this move more of the outbound dial special casing from random packages into tsdial, which aspires to be the one unified place for all outbound dialing shenanigans. Then this plumbs it all around, so everybody is ultimately holding on to the same dialer. As of this commit, macOS/iOS using an exit node should be able to reach to the exit node's DoH DNS proxy over peerapi, doing the sockopt to stay within the Network Extension. A number of steps remain, including but limited to: * move a bunch more random dialing stuff * make netstack-mode tailscaled be able to use exit node's DNS proxy, teaching tsdial's resolver to use it when an exit node is in use. Updates #1713 Change-Id: I1e8ee378f125421c2b816f47bc2c6d913ddcd2f5 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	3ae6f898cf	ipn/ipnlocal, net/dns/resolver: use exit node's DoH proxy when available Updates #1713 Change-Id: I3695a40ec12d2b4e6dac41cf4559daca6dddd68e Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Aaron Klotz	f93cf6fa03	net/dns: fix checking for wrapped error when attempting to read wsl.conf for Windows WSL2 Fixes https://github.com/tailscale/tailscale/issues/3437 Signed-off-by: Aaron Klotz <aaron@tailscale.com>	3 years ago
David Anderson	124363e0ca	net/dns: detect and decode UTF-16 from wsl.exe earlier. Fixes #3170 Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
Brad Fitzpatrick	135580a5a8	tailcfg, ipn/ipnlocal, net/dns: forward exit node DNS on Unix to system DNS Updates #1713 Change-Id: I4c073fec0992d9e01a9a4ce97087d5af0efdc68d Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	78b0bd2957	net/dns/resolver: add clientmetrics for DNS Fixes tailscale/corp#1811 Change-Id: I864d11e0332a177e8c5ff403591bff6fec548f5a Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	25525b7754	net/dns/resolver, ipn/ipnlocal: wire up peerapi DoH server to DNS forwarder Updates #1713 Change-Id: Ia4ed9d8c9cef0e70aa6d30f2852eaab80f5f695a Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Josh Bleecher Snyder	d10cefdb9b	net/dns: require space after nameserver/search parsing resolv.conf Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Josh Bleecher Snyder	9f00510833	net/dns: handle comments in resolv.conf Currently, comments in resolv.conf cause our parser to fail, with error messages like: ParseIP("192.168.0.100 # comment"): unexpected character (at " # comment") Fix that. Noticed while looking through logs. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Brad Fitzpatrick	283ae702c1	ipn/ipnlocal: start adding DoH DNS server to peerapi when exit node Updates #1713 Change-Id: I8d9c488f779e7acc811a9bc18166a2726198a429 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
David Anderson	88b8a09d37	net/dns: make constants for the various DBus strings. Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Anderson	6c82cebe57	health: add a health state for net/dns.OSConfigurator. Lets the systemd-resolved OSConfigurator report health changes for out of band config resyncs. Updates #3327 Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Anderson	4ef3fed100	net/dns: resync config to systemd-resolved when it restarts. Fixes #3327 Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Anderson	cf9169e4be	net/dns: remove unused Config struct element. Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
Josh Bleecher Snyder	758c37b83d	net/netns: thread logf into control functions So that darwin can log there without panicking during tests. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Brad Fitzpatrick	400ed799e6	net/dns: work around old systemd-resolved setLinkDomain length limit Don't set all the *.arpa. reverse DNS lookup domains if systemd-resolved is old and can't handle them. Fixes #3188 Change-Id: I283f8ce174daa8f0a972ac7bfafb6ff393dde41d Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
David Anderson	c5d572f371	net/dns: correctly handle NetworkManager-managed DNS that points to resolved. Fixes #3304 Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
Josh Bleecher Snyder	94fb42d4b2	all: use testingutil.MinAllocsPerRun There are a few remaining uses of testing.AllocsPerRun: Two in which we only log the number of allocations, and one in which dynamically calculate the allocations target based on a different AllocsPerRun run. This also allows us to tighten the "no allocs" test in wgengine/filter. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Denton Gentry	139a6c4c9c	net/dns: detect when resolvconf points to systemd-resolved. There are /etc/resolv.conf files out there where resolvconf wrote the file but pointed to systemd-resolved as the nameserver. We're better off handling those as systemd-resolved. > # Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8) > # DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN > # 127.0.0.53 is the systemd-resolved stub resolver. > # run "systemd-resolve --status" to see details about the actual nameservers. Fixes https://github.com/tailscale/tailscale/issues/3026 Signed-off-by: Denton Gentry <dgentry@tailscale.com>	3 years ago
David Anderson	a320d70614	net/dns: fall back to copy+delete/truncate if moving to/from /etc/resolv.conf fails. In some containers, /etc/resolv.conf is a bind-mount from outside the container. This prevents renaming to or from /etc/resolv.conf, because it's on a different filesystem from linux's perspective. It also prevents removing /etc/resolv.conf, because doing so would break the bind-mount. If we find ourselves within this environment, fall back to using copy+delete when renaming to /etc/resolv.conf, and copy+truncate when renaming from /etc/resolv.conf. Fixes #3000 Co-authored-by: Denton Gentry <dgentry@tailscale.com> Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago

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206 Commits (21445b56a5a411ac4f58d76466fc84140b2ff96c)