563 Commits (8e40bfc6ea420318d109b721e4b07707cfc4ba4d)

Author	SHA1	Message	Date
David Anderson	463b3e8f62	net/dnscache: use tls.Conn.HandshakeContext. ... Go 1.17 added a HandshakeContext func to take care of timeouts during TLS handshaking, so switch from our homegrown goroutine implementation to the standard way. Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Anderson	a9da6b73a8	net/dnscache: don't cancel the TLS context before writing to the result channel. ... Cancelling the context makes the timeout goroutine race with the write that reports a successful TLS handshake, so you can end up with a successful TLS handshake that mysteriously reports that it timed out after ~0s in flight. The context is always canceled and cleaned up as the function exits, which happens mere microseconds later, so just let function exit clean up and thereby avoid races. Signed-off-by: David Anderson <danderson@tailscale.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	51bc9a6d9d	net/netns: remove a useless probe of the "ip" command ... We stopped using it in 1.18. Change-Id: If5adf1d99275286a89e2a05f0bce5193d9f6e5e3 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	7d9b1de3aa	netcheck,portmapper,magicsock: ignore some UDP write errors on Linux ... Treat UDP send EPERM errors as a lost UDP packet, not something super fatal. That's just the Linux firewall preventing it from going out. And add a leaf package net/neterror for that (and future) policy that all three packages can share, with tests. Updates #3619 Change-Id: Ibdb838c43ee9efe70f4f25f7fc7fdf4607ba9c1d Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	2c94e3c4ad	wgengine/magicsock: don't unconditionally close DERP connections on rebind ... Only if the source address isn't on the currently active interface or a ping of the DERP server fails. Updates #3619 Change-Id: I6bf06503cff4d781f518b437c8744ac29577acc8 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	04c2c5bd80	net/interfaces: define DefaultRouteInterface and State.DefaultRouteInterface ... It was pretty ill-defined before and mostly for logging. But I wanted to start depending on it, so define what it is and make Windows match the other operating systems, without losing the log output we had before. (and add tests for that) Change-Id: I0fbbba1cfc67a265d09dd6cb738b73f0f6005247 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	39ffa16853	net/dnscache, net/tsdial: add DNS caching to tsdial UserDial ... This is enough to handle the DNS queries as generated by Go's net package (which our HTTP/SOCKS client uses), and the responses generated by the ExitDNS DoH server. This isn't yet suitable for putting on 100.100.100.100 where a number of different DNS clients would hit it, as this doesn't yet do EDNS0. It might work, but it's untested and likely incomplete. Likewise, this doesn't handle anything about truncation, as the exchanges are entirely in memory between Go or DoH. That would also need to be handled later, if/when it's hooked up to 100.100.100.100. Updates #3507 Change-Id: I1736b0ad31eea85ea853b310c52c5e6bf65c6e2a Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	21741e111b	net/packet: add ICMP6Header, like ICMP4Header ... So we can generate IPv6 ping replies. Change-Id: I79a9a38d8aa242e5dfca4cd15dfaffaea6cb1aee Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	affc4530a2	net/packet: don't make IP6Header.marshalPseudo assume UDP ... It will be used for ICMPv6 next, so pass in the proto. Also, use the ipproto constants rather than hardcoding the mysterious number. Change-Id: I57b68bdd2d39fff75f82affe955aff9245de246b Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	485bcdc951	net/packet: fix doc copy/paste-o ... Change-Id: I0aca490b3ccb0c124192afb362a10b19a15a3e2b Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	9c5c9d0a50	ipn/ipnlocal, net/tsdial: make SOCKS/HTTP dials use ExitDNS ... And simplify, unexport some tsdial/netstack stuff in the the process. Fixes #3475 Change-Id: I186a5a5cbd8958e25c075b4676f7f6e70f3ff76e Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	adc5997592	net/tsdial: give netstack a Dialer, start refactoring name resolution ... This starts to refactor tsdial.Dialer's name resolution to have different stages: in-memory MagicDNS vs system resolution. A future change will plug in ExitDNS resolution. This also plumbs a Dialer into netstack and unexports the dnsMap internals. And it removes some of the async AddNetworkMapCallback usage and replaces it with synchronous updates of the Dialer's netmap from LocalBackend, since the LocalBackend has the Dialer too. Updates #3475 Change-Id: Idcb7b1169878c74f0522f5151031ccbc49fe4cb4 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	8775c646be	net/tsdial: make dialing to peerapi work in netstack mode ... With this, I'm able to send a Taildrop file (using "tailscale file cp") from a Linux machine running --tun=userspace-networking. Updates #2179 Change-Id: I4e7a4fb0fbda393e4fb483adb06b74054a02cfd0 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	ad3d6e31f0	net/tsdial: move macOS/iOS peerapi sockopt logic from LocalBackend ... Change-Id: I812cae027c40c70cdc701427b1a1850cd9bcd60c Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	c7fb26acdb	net/tsdial: also plumb TUN name and monitor into tsdial.Dialer ... In prep for moving stuff out of LocalBackend. Change-Id: I9725aa9c3ebc7275f8c40e040b326483c0340127 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
Josh Bleecher Snyder	2075c39fd7	net/portmapper: deflake TestPCPIntegration ... Logging in goroutines after the test completed caused data races and panics. Prevent that. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Brad Fitzpatrick	d5405c66b7	net/tsdial: start of new package to unify all outbound dialing complexity ... For now this just deletes the net/socks5/tssocks implementation (and the DNSMap stuff from wgengine/netstack) and moves it into net/tsdial. Then initialize a Dialer early in tailscaled, currently only use for the outbound and SOCKS5 proxies. It will be plumbed more later. Notably, it needs to get down into the DNS forwarder for exit node DNS forwading in netstack mode. But it will also absorb all the peerapi setsockopt and netns Dial and tlsdial complexity too. Updates #1713 Change-Id: Ibc6d56ae21a22655b2fa1002d8fc3f2b2ae8b6df 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
Josh Bleecher Snyder	e16cb523aa	net/nettest: deflake TestPipeTimeout ... The block-write and block-read tests are both flaky, because each assumes it can get a normal read/write completed within 10ms. This isn’t always true. We can’t increase the timeouts, because that slows down the test. However, we don’t need to issue a regular read/write for this test. The immediately preceding tests already test this code, using a far more generous timeout. Remove the extraneous read/write. This drops the failure rate from 1 per 20,000 to undetectable on my machine. While we’re here, fix a typo in a debug print statement. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Josh Bleecher Snyder	a8cc519c70	net/portmapper: improve handling of UPnP parse errors ... Without the continue, we might overwrite our current meta with a zero meta. Log the error, so that we can check for anything unexpected. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Josh Bleecher Snyder	fddf43f3d1	net/portmapper: fill out PCP/PMP client metrics ... Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Josh Bleecher Snyder	9787ec6f4a	net/portmapper: add UPnP client metrics ... Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Josh Bleecher Snyder	40f11c50a1	net/portmapper: make PCP/PMP result codes stringers ... Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Josh Bleecher Snyder	38d90fa330	net/portmapper: add clientmetrics for PCP/PMP responses ... Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Josh Bleecher Snyder	999814e9e1	net/portmapper: handle pcp ADDRESS_MISMATCH response ... These show up a fair amount in our logs. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Brad Fitzpatrick	bb91cfeae7	net/socks5/tssocks, wgengine: permit SOCKS through subnet routers/exit nodes ... Fixes #1970 Change-Id: Ibef45e8796e1d9625716d72539c96d1dbf7b1f76 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
David Anderson	a54d13294f	net/proxymux: add a listener mux that can run SOCKS and HTTP on a single socket. ... Updates #3248 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
Josh Bleecher Snyder	73beaaf360	net/tstun: rate limit "self disco out packet" logging ... When this happens, it is incredibly noisy in the logs. It accounts for about a third of all remaining "unexpected" log lines from a recent investigation. It's not clear that we know how to fix this, we have a functioning workaround, and we now have a (cheap and efficient) metric for this that we can use for measurements. So reduce the logging to approximately once per minute. 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
Josh Bleecher Snyder	ad5e04249b	wgengine/monitor: ignore adding/removing uninteresting IPs ... One of the most common "unexpected" log lines is: "network state changed, but stringification didn't" One way that this can occur is if an interesting interface (non-Tailscale, has interesting IP address) gains or loses an uninteresting IP address (link local or loopback). The fact that the interface is interesting is enough for EqualFiltered to inspect it. The fact that an IP address changed is enough for EqualFiltered to declare that the interfaces are not equal. But the State.String method reasonably declines to print any uninteresting IP addresses. As a result, the network state appears to have changed, but the stringification did not. The String method is correct; nothing interesting happened. This change fixes this by adding an IP address filter to EqualFiltered in addition to the interface filter. This lets the network monitor ignore the addition/removal of uninteresting IP addresses. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Josh Bleecher Snyder	ca1b3fe235	net/tshttpproxy: use correct size for Windows BOOL argument ... The Windows BOOL type is an int32. We were using a bool, which is a one byte wide. This could be responsible for the ERROR_INVALID_PARAMETER errors we were seeing for calls to WinHttpGetProxyForUrl. We manually checked all other existing Windows syscalls for similar mistakes and did not find any. Updates #879 Co-authored-by: Aaron Klotz <aaron@tailscale.com> Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Josh Bleecher Snyder	1a629a4715	net/portmapper: mark fewer PMP probe failures as unexpected ... There are lots of lines in the logs of the form: portmapper: unexpected PMP probe response: {OpCode:128 ResultCode:3 SecondsSinceEpoch:NNN MappingValidSeconds:0 InternalPort:0 ExternalPort:0 PublicAddr:0.0.0.0} ResultCode 3 here means a network failure, e.g. the NAT box itself has not obtained a DHCP lease. This is not an indication that something is wrong in the Tailscale client, so use different wording here to reflect that. Keep logging, so that we can analyze and debug the reasons that PMP probes fail. Signed-off-by: Josh Bleecher Snyder <josh@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	cf06f9df37	net/tstun, wgengine: add packet-level and drop metrics ... Primarily tstun work, but some MagicDNS stuff spread into wgengine. No wireguard reconfig metrics (yet). Updates #3307 Change-Id: Ide768848d7b7d0591e558f118b553013d1ec94ad Signed-off-by: Brad Fitzpatrick <bradfitz@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
Brad Fitzpatrick	24ea365d48	netcheck, controlclient, magicsock: add more metrics ... Updates #3307 Change-Id: Ibb33425764a75bde49230632f1b472f923551126 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
Maisem Ali	eccc2ac6ee	net/interfaces/windows: update Tailscale interface detection logic to ... account for new wintun naming. Signed-off-by: Maisem Ali <maisem@tailscale.com>	3 years ago
David Anderson	0532eb30db	all: replace tailcfg.DiscoKey with key.DiscoPublic. ... 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	5302e4be96	net/portmapper: only print PCP/PMP if VerboseLogs ... Make UPnP, NAT-PMP, and PCP packet reception logs be [v1] so they will never appear on stdout and instead only go to logtail. ``` $ tailscale netcheck 2021/10/15 22:50:31 portmap: Got PMP response; IP: w.x.y.z, epoch: 1012707 2021/10/15 22:50:31 portmap: Got PCP response: epoch: 1012707 Report: * UDP: true * IPv4: yes, w.x.y.z:1511 * IPv6: no * MappingVariesByDestIP: true * HairPinning: false * PortMapping: NAT-PMP, PCP * Nearest DERP: San Francisco * DERP latency: - sfo: 5.9ms (San Francisco) - sea: 24ms (Seattle) - dfw: 45ms (Dallas) - ord: 53.7ms (Chicago) - nyc: 74.1ms (New York City) - tok: 111.1ms (Tokyo) - lhr: 139.4ms (London) - syd: 152.7ms (Sydney) - fra: 153.1ms (Frankfurt) - sin: 182.1ms (Singapore) - sao: 190.1ms (S_o Paulo) - blr: 218.6ms (Bangalore) ``` Signed-off-by: Denton Gentry <dgentry@tailscale.com>	3 years ago
David Anderson	060ba86baa	net/portmapper: ignore IGD SSDP responses from !defaultgw ... Now that we multicast the SSDP query, we can get IGD offers from devices other than the current device's default gateway. We don't want to accidentally bind ourselves to those. Updates #3197 Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Anderson	4a65b07e34	net/portmapper: also send UPnP SSDP query to the SSDP multicast address. ... Fixes #3197 Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
Brad Fitzpatrick	b0b0a80318	net/netcheck: implement netcheck for js/wasm clients ... And the derper change to add a CORS endpoint for latency measurement. And a little magicsock change to cut down some log spam on js/wasm. Updates #3157 Change-Id: I5fd9e6f5098c815116ddc8ac90cbcd0602098a48 Signed-off-by: Brad Fitzpatrick <bradfitz@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
Brad Fitzpatrick	a8e2cceefd	net/netcheck: hard-code preferred DERP region 900 on js/wasm for now ... See TODO in code. Updates #3157 Change-Id: I3a14dd2cf51d3c21336bb357af5abc362a079ff4 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	9b101bd6af	net/tstun: don't compile the code New constructor on js/wasm ... Updates #3157 Change-Id: I81603edf3e69e6f1517b0074eef6b648f2981c50 Signed-off-by: Brad Fitzpatrick <bradfitz@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
Brad Fitzpatrick	8efc306e4f	net/interfaces: assume the network's up on js/wasm ... Updates #3157 Change-Id: If4acd33598ad5e8ef7fb5960964c9ac32bc8f68b Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Joe Tsai	9af27ba829	cmd/cloner: mangle "go:generate" in cloner.go ... The "go generate" command blindly looks for "//go:generate" anywhere in the file regardless of whether it is truly a comment. Prevent this false positive in cloner.go by mangling the string to look less like "//go:generate". Signed-off-by: Joe Tsai <joetsai@digital-static.net>	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
Brad Fitzpatrick	4a3e2842d9	net/interfaces: add List, GetList ... And start moving funcs to methods on List. Signed-off-by: Brad Fitzpatrick <bradfitz@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
Aaron Klotz	1991a1ac6a	net/tstun: update tun_windows for wintun 0.14 API revisions, update wireguard-go dependency to 82d2aa87aa623cb5143a41c3345da4fb875ad85d ... Signed-off-by: Aaron Klotz <aaron@tailscale.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	5d6198adee	netcheck: don't log ErrGatewayRange ... "skipping portmap; gateway range likely lacks support" is really spammy on cloud systems, and not very useful in debugging. Fixes https://github.com/tailscale/tailscale/issues/3034 Signed-off-by: Denton Gentry <dgentry@tailscale.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
Avery Pennarun	0d4a0bf60e	magicsock: if STUN failed to send before, rebind before STUNning again. ... On iOS (and possibly other platforms), sometimes our UDP socket would get stuck in a state where it was bound to an invalid interface (or no interface) after a network reconfiguration. We can detect this by actually checking the error codes from sending our STUN packets. If we completely fail to send any STUN packets, we know something is very broken. So on the next STUN attempt, let's rebind the UDP socket to try to correct any problems. This fixes a problem where iOS would sometimes get stuck using DERP instead of direct connections until the backend was restarted. Fixes #2994 Signed-off-by: Avery Pennarun <apenwarr@tailscale.com>	3 years ago
Brad Fitzpatrick	2501a694cb	net/interfaces: add RegisterInterfaceGetter for Android ... Updates #2293 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	22a1a5d7cf	ipn/ipnlocal: for IPv6-only nodes, publish IPv6 MagicDNS records of peers ... See https://github.com/tailscale/tailscale/issues/2970#issuecomment-931885268 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	09c2462ae5	net/tlsdial: add forgotten test file for go mod tidy ... I forgot to include this file in the earlier 7cf8ec8108 commit. This exists purely to keep "go mod tidy" happy. Updates #1609 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	7cf8ec8108	net/tlsdial: bake in LetsEncrypt's ISRG Root X1 root ... We still try the host's x509 roots first, but if that fails (like if the host is old), we fall back to using LetsEncrypt's root and retrying with that. tlsdial was used in the three main places: logs, control, DERP. But it was missing in dnsfallback. So added it there too, so we can run fine now on a machine with no DNS config and no root CAs configured. Also, move SSLKEYLOGFILE support out of DERP. tlsdial is the logical place for that support. Fixes #1609 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
Brad Fitzpatrick	080381c79f	net/tstun: block looped disco traffic, take 17 ... It was in the wrong filter direction before, per CPU profiles we now have. Updates #1526 (maybe fixes? time will tell) Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	173bbaa1a1	all: disable TCP keep-alives on iOS/Android ... Updates #2442 Updates tailscale/corp#2750 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago