tailscale

Commit Graph

Author	SHA1	Message	Date
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
David Anderson	04d24d3a38	net/dns: move directManager function below directManager's definition. Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Anderson	422ea4980f	net/dns: remove a tiny wrapper function that isn't contributing anything. Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
Maxim Merzhanov	9f954628e5	net/dns: ignore UnknownMethod error in SetLinkDefaultRoute for resolved manager Signed-off-by: Maxim Merzhanov <maksimmerzh@gmail.com>	3 years ago
Maisem Ali	7817ab6b20	net/dns/resolver: set maxDoHInFlight to 1000 on iOS 15+. Signed-off-by: Maisem Ali <maisem@tailscale.com>	3 years ago
David Crawshaw	77696579f5	net/dns/resolver: drop dropping log Signed-off-by: David Crawshaw <crawshaw@tailscale.com>	3 years ago
Brad Fitzpatrick	676fb458c3	net/dns/resolver: make hasRDNSBonjourPrefix match shorter queries too Fixes tailscale/corp#2886 Updates tailscale/corp#2820 Updates #2442 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
nicksherron	f01ff18b6f	all: fix spelling mistakes Signed-off-by: nicksherron <nsherron90@gmail.com>	3 years ago
Smitty	b382161fe5	tsdns: don't forward transient DNS errors When a DNS server claims to be unable or unwilling to handle a request, instead of passing that refusal along to the client, just treat it as any other error trying to connect to the DNS server. This prevents DNS requests from failing based on if a server can respond with a transient error before another server is able to give an actual response. DNS requests only failing sometimes is really hard to find the cause of (#1033). Signed-off-by: Smitty <me@smitop.com>	3 years ago
Denton Gentry	d883747d8b	net/dns/resolver: don't forward DNS-SD on all platforms We added the initial handling only for macOS and iOS. With 1.16.0 now released, suppress forwarding DNS-SD on all platforms to test it through the 1.17.x cycle. Updates #2442 Signed-off-by: Denton Gentry <dgentry@tailscale.com>	3 years ago
Brad Fitzpatrick	297d1b7cb6	net/dns/resolver: don't forward DNS-SD queries Updates #2442 Fixes tailscale/corp#2820 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	47044f3af7	net/dns/resolver: fix log prefix The passed in logf already has a "dns: " prefix so they were doubled up.	3 years ago
Brad Fitzpatrick	7634af5c6f	all: gofmt Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Filippo Valsorda	d7ce2be5f4	net/dns/resolver: add unsecured Quad9 resolvers DNSSEC is an availability issue, as recently demonstrated by the Slack issue, with limited security advantage. DoH on the other hand is a critical security upgrade. This change adds DoH support for the non-DNSSEC endpoints of Quad9. https://www.quad9.net/service/service-addresses-and-features#unsec Signed-off-by: Filippo Valsorda <hi@filippo.io>	3 years ago
Denton Gentry	93c2882a2f	wgengine: flush DNS cache after major link change. Windows has a public dns.Flush used in router_windows.go. However that won't work for platforms like Linux, where we need a different flush mechanism for resolved versus other implementations. We're instead adding a FlushCaches method to the dns Manager, which can be made to work on all platforms as needed. Fixes https://github.com/tailscale/tailscale/issues/2132 Signed-off-by: Denton Gentry <dgentry@tailscale.com>	3 years ago
Maxim Merzhanov	d43fcd2f02	net/dns: fix error wrapping for SetLinkDefaultRoute in resolved Signed-off-by: Maxim Merzhanov <maksimmerzh@gmail.com>	3 years ago
Brad Fitzpatrick	640134421e	all: update tests to use tstest.MemLogger And give MemLogger a mutex, as one caller had, which does match the logf contract better. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
David Crawshaw	9502b515f1	net/dns: replace resolver IPs with type for DoH We currently plumb full URLs for DNS resolvers from the control server down to the client. But when we pass the values into the net/dns package, we throw away any URL that isn't a bare IP. This commit continues the plumbing, and gets the URL all the way to the built in forwarder. (It stops before plumbing URLs into the OS configurations that can handle them.) For #2596 Signed-off-by: David Crawshaw <crawshaw@tailscale.com>	3 years ago
David Anderson	bb6fdfb243	net/dns: fix the build on freebsd (missing default case in switch) Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Anderson	b3b1c06b3a	net/dns: only restart systemd-resolved if we changed /etc/resolv.conf. Reported on IRC: in an edge case, you can end up with a directManager DNS manager and --accept-dns=false, in which case we should do nothing, but actually end up restarting resolved whenever the netmap changes, even though the user told us to not manage DNS. Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Anderson	10547d989d	net/dns: exhaustively test DNS selection paths for linux. Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Anderson	c071bcda33	net/dns: relax systemd-resolved detection. Reported on IRC: a resolv.conf that contained two entries for "nameserver 127.0.0.53", which defeated our "is resolved actually in charge" check. Relax that check to allow any number of nameservers, as long as they're all 127.0.0.53. Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago

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185 Commits (96cab21383b321d29d6523ea56711e8381faeaac)