442 Commits (71029cea2ddf82007b80f465b256d027eab0f02d)

Author	SHA1	Message	Date
Aaron Klotz	c163b2a3f1	util/winutil, util/winutil/vss: remove winrestore and vss as they are unnecessary. ... I wrote this code way back at the beginning of my tenure at Tailscale when we had concerns about needing to restore deleted machine keys from backups. We never ended up using this functionality, and the code is now getting in the way, so we might as well remove it. Signed-off-by: Aaron Klotz <aaron@tailscale.com>	2 years ago
James Tucker	4bb7440094	cmd/tailscaled: use --statedir as documented ... Enables the behavior described in the statepath flag, where if only statedir is passed, then state is statedir/tailscaled.state. Signed-off-by: James Tucker <james@tailscale.com>	2 years ago
Tom DNetto	9dee6adfab	cmd/tailscaled,ipn/ipnlocal,wgengine/...: pass dns.Manager into netstack ... Needed for a following commit which moves magicDNS handling into netstack. Signed-off-by: Tom DNetto <tom@tailscale.com>	2 years ago
Aaron Klotz	d915e0054c	cmd/tailscaled: change Windows service shutdown and add optional event logging ... Once a stop request is received and the service updates its status to `svc.StopPending`, it should continue running *until the shutdown sequence is complete*, and then return out of `(*ipnService).Execute`, which automatically sends a `svc.Stopped` notification to Windows. To make this happen, I changed the loop so that it runs until `doneCh` is closed, and then returns. I also removed a spurious `svc.StopPending` notification that the Windows Service Control Manager might be interpreting as a request for more time to shut down. Finally, I added some optional logging that sends a record of service notifications to the Windows event log, allowing us to more easily correlate with any Service Control Manager errors that are sent to the same log. Change-Id: I5b596122e5e89c4c655fe747a612a52cb4e8f1e0 Signed-off-by: Aaron Klotz <aaron@tailscale.com>	2 years ago
Brad Fitzpatrick	6bed781259	all: gofmt all ... Well, goimports actually (which adds the normal import grouping order we do) Change-Id: I0ce1b1c03185f3741aad67c14a7ec91a838de389 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Maisem Ali	5a1ef1bbb9	net/tsdial: add SystemDial as a wrapper on netns.Dial ... The connections returned from SystemDial are automatically closed when there is a major link change. Also plumb through the dialer to the noise client so that connections are auto-reset when moving from cellular to WiFi etc. Updates #3363 Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 years ago
Brad Fitzpatrick	c88506caa6	ipn/ipnlocal: add Wake-on-LAN function to peerapi ... No CLI support yet. Just the curl'able version if you know the peerapi port. (like via a TSMP ping) Updates #306 Change-Id: I0662ba6530f7ab58d0ddb24e3664167fcd1c4bcf Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	3601b43530	ipn: add IPCVersion override func ... I've done this a handful of times in the past and again today. Time to make it a supported thing for the future. Used while debugging tailscale/corp#4559 (macsys CLI issues) Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	910ae68e0b	util/mak: move tailssh's mapSet into a new package for reuse elsewhere ... Change-Id: Idfe95db82275fd2be6ca88f245830731a0d5aecf Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Maisem Ali	695f8a1d7e	ssh/tailssh: add support for sftp ... Updates #3802 Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 years ago
Brad Fitzpatrick	53588f632d	Revert "wgengine/router,util/kmod: load & log xt_mark" ... This reverts commit 8d6793fd70. Reason: breaks Android build (cgo/pthreads addition) We can try again next cycle. Change-Id: I5e7e1730a8bf399a8acfce546a6d22e11fb835d5 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
James Tucker	8d6793fd70	wgengine/router,util/kmod: load & log xt_mark ... Attempt to load the xt_mark kernel module when it is not present. If the load fails, log error information. It may be tempting to promote this failure to an error once it has been in use for some time, so as to avoid reaching an error with the iptables invocation, however, there are conditions under which the two stages may disagree - this change adds more useful breadcrumbs. Example new output from tailscaled running under my WSL2: ``` router: ensure module xt_mark: "/usr/sbin/modprobe xt_mark" failed: exit status 1; modprobe: FATAL: Module xt_mark not found in directory /lib/modules/5.10.43.3-microsoft-standard-WSL2 ``` Background: There are two places to lookup modules, one is `/proc/modules` "old", the other is `/sys/module/` "new". There was query_modules(2) in linux <2.6, alas, it is gone. In a docker container in the default configuration, you would get /proc/modules and /sys/module/ both populated. lsmod may work file, modprobe will fail with EPERM at `finit_module()` for an unpriviliged container. In a priviliged container the load may *succeed*, if some conditions are met. This condition should be avoided, but the code landing in this change does not attempt to avoid this scenario as it is both difficult to detect, and has a very uncertain impact. In an nspawn container `/proc/modules` is populated, but `/sys/module` does not exist. Modern `lsmod` versions will fail to gather most module information, without sysfs being populated with module information. In WSL2 modules are likely missing, as the in-use kernel typically is not provided by the distribution filesystem, and WSL does not mount in a module filesystem of its own. Notably the WSL2 kernel supports iptables marks without listing the xt_mark module in /sys/module, and /proc/modules is empty. On a recent kernel, we can ask the capabilities system about SYS_MODULE, that will help to disambiguate between the non-privileged container case and just being root. On older kernels these calls may fail. Update #4329 Signed-off-by: James Tucker <james@tailscale.com>	2 years ago
Brad Fitzpatrick	8ee044ea4a	ssh/tailssh: make the SSH server a singleton, register with LocalBackend ... Remove the weird netstack -> tailssh dependency and instead have tailssh register itself with ipnlocal when linked. This makes tailssh.server a singleton, so we can have a global map of all sessions. Updates #3802 Change-Id: Iad5caec3a26a33011796878ab66b8e7b49339f29 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
phirework	83c734a6e0	net/dns, util/publicdns: extract public DNS mapping into own package (#4405) ... This extracts DOH mapping of known public DNS providers in forwarder.go into its own package, to be consumed by other repos Signed-off-by: Jenny Zhang <jz@tailscale.com>	2 years ago
James Tucker	8de7f9bff7	tailscaled: no longer tune gcpercent ... Usage of userspace-networking is increasing, and the aggressive GC tuning causes a significant reduction in performance in that mode. Signed-off-by: James Tucker <james@tailscale.com>	2 years ago
James Tucker	2550acfd9d	go.mod: bump netstack for clone reset fix (#4379) ... In tracking down issue #4144 and reading through the netstack code in detail, I discovered that the packet buf Clone path did not reset the packetbuf it was getting from the sync.Pool. The fix was sent upstream https://github.com/google/gvisor/pull/7385, and this bump pulls that in. At this time there is no known path that this fixes, however at the time of upstream submission this reset at least one field that could lead to incorrect packet routing if exercised, a situation that could therefore lead to an information leak. Signed-off-by: James Tucker <james@tailscale.com>	2 years ago
James Tucker	c6ac29bcc4	wgengine/netstack: disable refsvfs2 leak tracking (#4378) ... In addition an envknob (TS_DEBUG_NETSTACK_LEAK_MODE) now provides access to set leak tracking to more useful values. Fixes #4309 Signed-off-by: James Tucker <james@tailscale.com>	2 years ago
Brad Fitzpatrick	5a44f9f5b5	tempfork: temporarily fork gliderlabs/ssh and x/crypto/ssh ... While we rearrange/upstream things. gliderlabs/ssh is forked into tempfork from our prior fork at be8b7add40 x/crypto/ssh OTOH is forked at https://github.com/tailscale/golang-x-crypto because it was gnarlier to vendor with various internal packages, etc. Its git history shows where it starts (2c7772ba30643b7a2026cbea938420dce7c6384d). Updates #3802 Change-Id: I546e5cdf831cfc030a6c42557c0ad2c58766c65f Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Josh Bleecher Snyder	77b4fe0afa	all: remove "no 1.18 support" failures ... We have worked around the issue in DERP, so the vanilla Go 1.18 toolchain now works. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	2 years ago
Aaron Klotz	6e91f872af	net/tshttpproxy: ensure we pass the correct flags to WinHttpOpen on Win7 and Win8.0 ... The best flag to use on Win7 and Win8.0 is deprecated in Win8.1, so we resolve the flag depending on OS version info. Fixes https://github.com/tailscale/tailscale/issues/4201 Signed-off-by: Aaron Klotz <aaron@tailscale.com>	2 years ago
Brad Fitzpatrick	1db46919ab	cmd/tailscaled: make build fail nicely on older Go versions ... Due to a bug in Go (golang/go#51778), cmd/go doesn't warn about your Go version being older than the go.mod's declared Go version in that case that package loading fails before the build starts, such as when you use packages that are only in the current version of Go, like our use of net/netip. This change works around that Go bug by adding build tags and a pre-Go1.18-only file that will cause Go 1.17 and earlier to fail like: $ ~/sdk/go1.17/bin/go install ./cmd/tailscaled # tailscale.com/cmd/tailscaled ./required_version.go:11:2: undefined: you_need_Go_1_18_to_compile_Tailscale note: module requires Go 1.18 Change-Id: I39f5820de646703e19dde448dd86a7022252f75c Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Josh Bleecher Snyder	997b19545b	syncs: use TryLock and TryRLock instead of unsafe ... The docs say: Note that while correct uses of TryLock do exist, they are rare, and use of TryLock is often a sign of a deeper problem in a particular use of mutexes. Rare code! Or bad code! Who can tell! Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	2 years ago
Brad Fitzpatrick	ead16b24ec	cmd/tailscaled: fail early with nice error on macOS with go1.18 ... Due to golang/go#51759 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Josh Bleecher Snyder	8c2cb4b431	go.mod: update to latest certstore ... It includes a fix to allow us to use Go 1.18. We can now remove our Tailscale-only build tags. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	2 years ago
Josh Bleecher Snyder	26021b07ec	control/controlclient: only build certstore-related code with the Tailscale Go toolchain ... The certstore code is impacted by golang/go#51726. The Tailscale Go toolchain fork contains a temporary workaround, so it can compile it. Once the upstream toolchain can compile certstore, presumably in Go 1.18.1, we can revert this change. Note that depaware runs with the upstream toolchain. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	2 years ago
Josh Bleecher Snyder	1b57b0380d	wgengine/magicsock: remove final alloc from ReceiveFrom ... And now that we don't have to play escape analysis and inlining games, simplify the code. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	2 years ago
Josh Bleecher Snyder	71b535fc94	go.mod: require Go 1.18 ... Also, update depaware for Go 1.18's dependency tree. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	2 years ago
Maisem Ali	da6ce27416	go.mod: move from github.com/gliderlabs/ssh to github.com/tailscale/ssh ... Updates #4146 Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 years ago
Brad Fitzpatrick	ba1adf6c24	ssh/tailssh: make pty termios options match OpenSSH ... Still not sure the exact rules of how/when/who's supposed to set these, but this works for now on making them match. Baby steps. Will research more and adjust later. Updates #4146 (but not enough to fix it, something's still wrong) Updates #3802 Change-Id: I496d8cd7e31d45fe9ede88fc8894f35dc096de67 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Maisem Ali	06c147d848	ssh/tailssh: create login sessions for new connections ... Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 years ago
Maisem Ali	0f31a0fc76	control/controlclient: add Noise client ... Updates #3488 Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 years ago
Brad Fitzpatrick	db85384f9c	cmd/tailscaled: default to userspace-networking mode on gokrazy, set paths ... One of the current few steps to run Tailscale on gokrazy is to specify the --tun=userspace-networking flag: https://gokrazy.org/userguide/install/tailscale/ Instead, make it the default for now. Later we can change the default to kernel mode if available and fall back to userspace mode like Synology, once #391 is done. Likewise, set default paths for Gokrazy, as its filesystem hierarchy is not the Linux standard one. Instead, use the conventional paths as documented at https://gokrazy.org/userguide/install/tailscale/. Updates #1866 RELNOTE=default to userspace-networking mode on gokrazy Change-Id: I3766159a294738597b4b30629d2860312dbb7609 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	55095df644	net/interfaces: get Linux default route from netlink as fallback ... If it's in a non-standard table, as it is on Unifi UDM Pro, apparently. Updates #4038 (probably fixes, but don't have hardware to verify) Change-Id: I2cb9a098d8bb07d1a97a6045b686aca31763a937 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Maisem Ali	497324ddf6	ipn/store: add common package for instantiating ipn.StateStores ... Also move KubeStore and MemStore into their own package. RELNOTE: tsnet now supports providing a custom ipn.StateStore. Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 years ago
Dmytro Shynkevych	d9a7205be5	net/tstun: set link speed to SPEED_UNKNOWN ... Fixes #3933. Signed-off-by: Dmytro Shynkevych <dm.shynk@gmail.com>	2 years ago
Brad Fitzpatrick	4686224e5a	cmd/tailscaled: add a no-op test for profiling init-time memory allocs ... Turns out we're pretty good already at init-time work in tailscaled. The regexp/syntax shows up but it's hard to get rid of that; zstd even uses regexp. *shrug* Change-Id: I856aca056dcb7489f5fc22ef07f55f34ddf19bd6 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	4cbdc84d27	cmd/tailscaled/childproc: add be-child registration mechanism ... For ssh and maybe windows service babysitter later. Updates #3802 Change-Id: I7492b98df98971b3fb72d148ba92c2276cca491f Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	c9eca9451a	ssh: make it build on darwin ... For local dev testing initially. Product-wise, it'll probably only be workable on the two unsandboxed builds. Updates #3802 Change-Id: Ic352f966e7fb29aff897217d79b383131bf3f92b Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 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>	2 years ago
Maisem Ali	c7a8f0992d	ipn/ipnlocal: use views for Peer.PrimaryRoutes and Peer.Tags ... RELNOTE=`tailscale status --json` now shows Tags and PrimaryRoutes Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 years ago
Maisem Ali	f9a50779e2	cmd/tailscaled: add `-state=mem:` to support creation of an ephemeral node. ... RELNOTE=`tailscaled --state=mem:` registers as an ephemeral node and does not store state to disk. Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 years ago
Maisem Ali	72d8672ef7	tailcfg: make Node.Hostinfo a HostinfoView ... Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 years ago
Brad Fitzpatrick	1b87e025e9	ssh/tailssh: move SSH code from wgengine/netstack to this new package ... Still largely incomplete, but in a better home now. Updates #3802 Change-Id: I46c5ffdeb12e306879af801b06266839157bc624 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 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>	2 years ago
Brad Fitzpatrick	8fe503057d	net/netutil: unify two oneConnListeners into a new package ... I was about to add a third copy, so unify them now instead. Change-Id: I3b93896aa1249b1250a6b1df4829d57717f2311a Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Aaron Klotz	3a74f2d2d7	cmd/tailscaled, util/winutil: add accessor functions for Windows system policies. ... This patch adds new functions to be used when accessing system policies, and revises callers to use the new functions. They first attempt the new registry path for policies, and if that fails, attempt to fall back to the legacy path. We keep non-policy variants of these functions because we should be able to retain the ability to read settings from locations that are not exposed to sysadmins for group policy edits. The remaining changes will be done in corp. Updates https://github.com/tailscale/tailscale/issues/3584 Signed-off-by: Aaron Klotz <aaron@tailscale.com>	2 years ago
Brad Fitzpatrick	1af26222b6	go.mod: bump netstack, switch to upstream netstack ... Now that Go 1.17 has module graph pruning (https://go.dev/doc/go1.17#go-command), we should be able to use upstream netstack without breaking our private repo's build that then depends on the tailscale.com Go module. This is that experiment. Updates #1518 (the original bug to break out netstack to own module) Updates #2642 (this updates netstack, but doesn't remove workaround) Change-Id: I27a252c74a517053462e5250db09f379de8ac8ff Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	f3c0023add	wgengine/netstack: add an SSH server experiment ... Disabled by default. To use, run tailscaled with: TS_SSH_ALLOW_LOGIN=you@bar.com And enable with: $ TAILSCALE_USE_WIP_CODE=true tailscale up --ssh=true Then ssh [any-user]@[your-tailscale-ip] for a root bash shell. (both the "root" and "bash" part are temporary) Updates #3802 Change-Id: I268f8c3c95c8eed5f3231d712a5dc89615a406f0 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 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>	2 years ago
Brad Fitzpatrick	92dfaf53bb	cmd/tailscaled: include Go runtime metrics in /debug/metrics ... Fixes #3772 Change-Id: I237ea23268664d99e83d27890146018b04474556 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 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>	2 years ago
Brad Fitzpatrick	ae319b4636	wgengine/magicsock: add HTML debug handler to see magicsock state ... Change-Id: Ibc46f4e9651e1c86ec6f5d139f5e9bdc7a488415 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	3dedcd1640	logpolicy, ipn/ipnserver: connect to logtail via tailscaled when needed ... This is for use by the Windows GUI client to log via when an exit node is in use, so the logs don't go out via the exit node and instead go directly, like tailscaled's. The dialer tried to do that in the unprivileged GUI by binding to a specific interface, but the "Internet Kill Switch" installed by tailscaled for exit nodes precludes that from working and instead the GUI fails to dial out. So, go through tailscaled (with a CONNECT request) instead. Fixes tailscale/corp#3169 Change-Id: I17a8efdc1d4b8fed53a29d1c19995592b651b215 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	40e2b312b6	ipn/ipnserver, logpolicy: move Windows disk logging up earlier ... This moves the Windows-only initialization of the filelogger into logpolicy. Previously we only did it when babysitting the tailscaled subprocess, but this meant that log messages from the service itself never made it to disk. Examples that weren't logged to disk: * logtail unable to dial out, * DNS flush messages from the service * svc.ChangeRequest messages (#3581) This is basically the same fix as #3571 but staying in the Logf type, and avoiding build-tagged file (which wasn't quite a goal, but happened and seemed nice) Fixes #3570 Co-authored-by: Aaron Klotz <aaron@tailscale.com> Change-Id: Iacd80c4720b7218365ec80ae143339d030842702	2 years ago
Brad Fitzpatrick	689426d6bc	cmd/tailscaled: log Windows service change requests ... And add a little comment. Change-Id: If0bedf8aefd8d528149548fba829e7a9a8b2e114 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	59f4f33f60	cmd/tailscaled: fix windows logtail integration ... I broke it in 1.17.x sometime while rewiring some logs stuff, mostly in 0653efb092 (but with a handful of logs-related changes around that time) Fixes tailscale/corp#3265 Change-Id: Icb5c07412dc6d55f1d9244c5d0b51dceca6a7e34 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 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	a28d280b95	cmd/tailscaled: move start-up failure logging to one place ... The caller of func run said: // No need to log; the func already did But that wasn't true. Some return paths didn't log. So instead, return rich errors and have func main do the logging, so we can't miss anything in the future. Prior to this, safesocket.Listen for instance was causing tailscaled to os.Exit(1) on failure without any clue as to why. Change-Id: I9d71cc4d73d0fed4aa1b1902cae199f584f25793 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	d3d503d997	ipn/ipnlocal: add HTTP/2 h2c server support to peerapi on non-mobile platforms ... To make ExitDNS cheaper. Might not finish client-side support in December before 1.20, but at least server support can start rolling out ahead of clients being ready for it. Tested with curl against peerapi. Updates #1713 Change-Id: I676fed5fb1aef67e78c542a3bc93bddd04dd11fe 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	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
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
David Anderson	6e584ffa33	cmd/tailscaled: allow running the SOCKS5 and HTTP proxies on the same port. ... Fixes #3248 Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Crawshaw	1e8b4e770a	update github.com/aws/aws-sdk-go-v2 ... Replaces #3464, #3365, #3366 with a PR that includes the depaware fix. Signed-off-by: David Crawshaw <crawshaw@tailscale.com>	3 years ago
Thomas Weiß	6dc6ea9b37	cmd/tailscaled: log error on state store init failure ... Signed-off-by: Thomas Weiß <panos@unbunt.org>	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
Brad Fitzpatrick	2ea765e5d8	go.mod: bump inet.af/netstack ... Updates #2642 (I'd hoped, but doesn't seem to fix it) Change-Id: Id54af7c90a1206bc7018215957e20e954782b911 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	5294125e7a	cmd/tailscaled: disambiguate some startup failure error messages ... Updates #3351 Change-Id: I0afead4a084623567f56b19187574fa97b295b2a Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	0653efb092	cmd/tailscaled: remove a redundant date prefix on Windows logs ... Change-Id: I28e122d4384697f51a748d67829409276c00b11e Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	ec036b3561	logpolicy: use bootstrap DNS for logtail dialer ... Fixes #3332 Change-Id: Ie45efb448e5508c3ece48dd1d8d7e9a39e2e9dc1 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
David Anderson	41da7620af	go.mod: update wireguard-go to pick up roaming toggle ... wgengine/wgcfg: introduce wgcfg.NewDevice helper to disable roaming at all call sites (one real plus several tests). Fixes tailscale/corp#3016. Signed-off-by: David Anderson <danderson@tailscale.com> Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Brad Fitzpatrick	3b541c833e	util/clientmetric, logtail: log metric changes ... Updates #3307 Change-Id: I1399ebd786f6ff7defe6e11c0eb651144c071574 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	57b039c51d	util/clientmetrics: add new package to add metrics to the client ... And annotate magicsock as a start. And add localapi and debug handlers with the Prometheus-format exporter. Updates #3307 Change-Id: I47c5d535fe54424741df143d052760387248f8d3 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	e6fbc0cd54	cmd/tailscaled, ipn/ipnserver: refactor ipnserver ... More work towards removing the massive ipnserver.Run and ipnserver.Options and making composable pieces. Work remains. (The getEngine retry loop on Windows complicates things.) For now some duplicate code exists. Once the Windows side is fixed to either not need the retry loop or to move the retry loop into a custom wgengine.Engine wrapper, then we can unify tailscaled_windows.go too. Change-Id: If84d16e3cd15b54ead3c3bb301f27ae78d055f80 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	2b082959db	safesocket: add WindowsLocalPort const ... Remove all the 41112 references. Change-Id: I2d7ed330d457e3bb91b7e6416cfb2667611e50c4 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	649f7556e8	cmd/tailscaled, ipn: add tailscaled --statedir flag for var directory ... Fixes #2932 Change-Id: I1aa2b323ad542386d140f8336bcc4dcbb8310bd0 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Josh Bleecher Snyder	3fd5f4380f	util/multierr: new package ... github.com/go-multierror/multierror served us well. But we need a few feature from it (implement Is), and it's not worth maintaining a fork of such a small module. Instead, I did a clean room implementation inspired by its API. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Brad Fitzpatrick	ff1954cfd9	wgengine/router: use netlink for ip rules on Linux ... Using temporary netlink fork in github.com/tailscale/netlink until we get the necessary changes upstream in either vishvananda/netlink or jsimonetti/rtnetlink. Updates #391 Change-Id: I6e1de96cf0750ccba53dabff670aca0c56dffb7c Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	5dc5bd8d20	cmd/tailscaled, wgengine/netstack: always wire up netstack ... Even if not in use. We plan to use it for more stuff later. (not for iOS or macOS-GUIs yet; only tailscaled) Change-Id: Idaef719d2a009be6a39f158fd8f57f8cca68e0ee Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
David Anderson	27e83402a8	cmd/tailscaled: fix depaware.	3 years ago
David Anderson	37c150aee1	derp: use new node key type. ... Update #3206 Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Anderson	15376f975b	types/wgkey: delete, no longer used. ... Updates #3206 Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Anderson	c41fe182f0	cmd/tailscaled: update depaware. ... Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
Brad Fitzpatrick	dc2fbf5877	wgengine/router: start using netlink instead of 'ip' on Linux ... Converts up, down, add/del addresses, add/del routes. Not yet done: rules. Updates #391 Change-Id: I02554ca07046d18f838e04a626ba99bbd35266fb Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	31e4f60047	version: embed VERSION.txt in unstamped version ... Temporary measure until we switch to Go 1.18. $ go run ./cmd/tailscale version 1.17.0-date.20211022 go version: go1.17 Updates #81 Change-Id: Ic82ebffa5f46789089e5fb9810b3f29e36a47f1a Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	505f844a43	cmd/derper, derp/derphttp: add websocket support ... Updates #3157 Change-Id: I337a919a3b350bc7bd9af567b49c4d5d6616abdd Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Aaron Klotz	c6ea282b3f	utils/winutil utils/winutil/vss: add utility function for extracting data from Windows System Restore Point backups. ... utils/winutil/vss contains just enough COM wrapping to query the Volume Shadow Copy service for snapshots. WalkSnapshotsForLegacyStateDir is the friendlier interface that adds awareness of our actual use case, mapping the snapshots and locating our legacy state directory. Updates #3011 Signed-off-by: Aaron Klotz <aaron@tailscale.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
Maxime VISONNEAU	4528f448d6	ipn/store/aws, cmd/tailscaled: add AWS SSM ipn.StateStore implementation ... From https://github.com/tailscale/tailscale/pull/1919 with edits by bradfitz@. This change introduces a new storage provider for the state file. It allows users to leverage AWS SSM parameter store natively within tailscaled, like: $ tailscaled --state=arn:aws:ssm:eu-west-1:123456789:parameter/foo Known limitations: - it is not currently possible to specific a custom KMS key ID RELNOTE=tailscaled on Linux supports using AWS SSM for state Edits-By: Brad Fitzpatrick <bradfitz@tailscale.com> Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com> Signed-off-by: Maxime VISONNEAU <maxime.visonneau@gmail.com>	3 years ago
Aaron Klotz	df7899759d	cmd/tailscaled: set the correct flag for receiving Windows session change events ... This feature wasn't working until I realized that we also need to opt into the events. MSDN wasn't so generous as to make this easy to deduce. Updates #2956 Signed-off-by: Aaron Klotz <aaron@tailscale.com>	3 years ago
Brad Fitzpatrick	3618e8d8ac	cmd/tailscaled: rename outbound HTTP proxy flag ... The old name invited confusion: * is this the HTTP proxy to use ourselves? (no, that's via an environment variable, per proxy conventions) * is this for LetsEncrypt https-to-localhost-http proxying? (no, that'll come later) So rename to super verbose --outbound-http-proxy-listen before the 1.16.0 release to make it clear what it is. It listens (serves) and it's for outbound, not inbound. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Aaron Klotz	e016eaf410	cmd/tailscaled: conditionally flush Windows DNS cache on SessionChange ... For the service, all we need to do is handle the `svc.SessionChange` command. Upon receipt of a `windows.WTS_SESSION_UNLOCK` event, we fire off a goroutine to flush the DNS cache. (Windows expects responses to service requests to be quick, so we don't want to do that synchronously.) This is gated on an integral registry value named `FlushDNSOnSessionUnlock`, whose value we obtain during service initialization. (See [this link](https://docs.microsoft.com/en-us/windows/win32/api/winsvc/nc-winsvc-lphandler_function_ex) for information re: handling `SERVICE_CONTROL_SESSIONCHANGE`.) Fixes #2956 Signed-off-by: Aaron Klotz <aaron@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
Brad Fitzpatrick	a7cb241db1	cmd/tailscaled: add support for running an HTTP proxy ... This adds support for tailscaled to be an HTTP proxy server. It shares the same backend dialing code as the SOCK5 server, but the client protocol is HTTP (including CONNECT), rather than SOCKS. Fixes #2289 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	56d8c2da34	cmd/tailscaled: set StateDirectoryMode=0700 in tailscaled.service ... Updates #2934 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	efb84ca60d	ipn/localapi, cmd/tailscale: add CPU & memory profile support, debug command ... This was already possible on Linux if you ran tailscaled with --debug (which runs net/http/pprof), but it requires the user have the Go toolchain around. Also, it wasn't possible on macOS, as there's no way to run the IPNExtension with a debug server (it doesn't run tailscaled). And on Windows it's super tedious: beyond what users want to do or what we want to explain. Instead, put it in "tailscale debug" so it works and works the same on all platforms. Then we can ask users to run it when we're debugging something and they can email us the output files. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	9ca334a560	cmd/tailscaled: appease a security scanner ... There are two reasons this can't ever go to actual logs, but rewrite it to make it happy. Fixes tailscale/corp#2695 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
David Anderson	18086c4cb7	go.mod: bump github.com/klauspost/compress to 1.13.6 ... Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
Aaron Klotz	9ebb5d4205	ipn, paths: ensure that the state directory for Windows has the correct perms ... ProgramData has a permissive ACL. For us to safely store machine-wide state information, we must set a more restrictive ACL on our state directory. We set the ACL so that only talescaled's user (ie, LocalSystem) and the Administrators group may access our directory. We must include Administrators to ensure that logs continue to be easily accessible; omitting that group would force users to use special tools to log in interactively as LocalSystem, which is not ideal. (Note that the ACL we apply matches the ACL that was used for LocalSystem's AppData\Local). There are two cases where we need to reset perms: One is during migration from the old location to the new. The second case is for clean installations where we are creating the file store for the first time. Updates #2856 Signed-off-by: Aaron Klotz <aaron@tailscale.com>	3 years ago
Brad Fitzpatrick	4f648e6fcc	cmd/tailscaled: disable netns earlier in userspace-networking mode ... The earlier 382b349c54 was too late, as engine creation itself needed to listen on things. Fixes #2827 Updates #2822 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	382b349c54	cmd/tailscaled: disable netns in userspace-networking mode ... Updates #2827 Updates #2822 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Dave Anderson	980acc38ba	types/key: add a special key with custom serialization for control private keys (#2792) ... * Revert "Revert "types/key: add MachinePrivate and MachinePublic."" This reverts commit 61c3b98a24. Signed-off-by: David Anderson <danderson@tailscale.com> * types/key: add ControlPrivate, with custom serialization. ControlPrivate is just a MachinePrivate that serializes differently in JSON, to be compatible with how the Tailscale control plane historically serialized its private key. Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Anderson	61c3b98a24	Revert "types/key: add MachinePrivate and MachinePublic." ... Broke the tailscale control plane due to surprise different serialization. This reverts commit 4fdb88efe1.	3 years ago
David Anderson	4fdb88efe1	types/key: add MachinePrivate and MachinePublic. ... Plumb throughout the codebase as a replacement for the mixed use of tailcfg.MachineKey and wgkey.Private/Public. Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
Brad Fitzpatrick	99a1c74a6a	metrics: optimize CurrentFDs to not allocate on Linux ... It was 50% of our allocs on one of our servers. (!!) Updates #2784 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Maisem Ali	0842e2f45b	ipn/store: add ability to store data as k8s secrets. ... Signed-off-by: Maisem Ali <maisem@tailscale.com>	3 years ago
Brad Fitzpatrick	21cb0b361f	safesocket: add connect retry loop to wait for tailscaled ... Updates #2708 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
David Anderson	97693f2e42	wgengine/magicsock: delete legacy AddrSet endpoints. ... Instead of using the legacy codepath, teach discoEndpoint to handle peers that have a home DERP, but no disco key. We can still communicate with them, but only over DERP. Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
Maisem Ali	fd4838dc57	wgengine/userspace: add support to automatically enable/disable the tailscale ... protocol in BIRD, when the node is a primary subnet router as determined by control. Signed-off-by: Maisem Ali <maisem@tailscale.com>	3 years ago
Brad Fitzpatrick	4aab083cae	cmd/tailscaled: add debug flag to print interfaces just once ... It previously only had a polling monitor mode. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	47045265b9	hostinfo: add SetDeviceModel setter, move remaining code from controlclient ... Updates tailscale/corp#1959 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Maisem Ali	9f62cc665e	tailscaled: try migrating old state on synology devices ... Signed-off-by: Maisem Ali <maisem@tailscale.com>	3 years ago
Brad Fitzpatrick	57b794c338	ipn/localapi: move cert fetching code to localapi, cache, add cert subcommand ... Updates #1235 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Matt Layher	8ab44b339e	net/tstun: use unix.Ifreq type for Linux TAP interface configuration ... Signed-off-by: Matt Layher <mdlayher@gmail.com>	3 years ago
Josh Bleecher Snyder	d2aa144dcc	syncs: bump known good version to include Go 1.17 ... Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Denton Gentry	3e7ff5ff98	cmd/tailscaled: enable hybrid netstack mode for FreeBSD. ... Allows FreeBSD to function as an exit node in the same way that Windows and Tailscaled-on-MacOS do. RELNOTE=FreeBSD can now function as an exit node. Fixes https://github.com/tailscale/tailscale/issues/2498 Signed-off-by: Denton Gentry <dgentry@tailscale.com>	3 years ago
Josh Bleecher Snyder	a4e19f2233	version: remove rsc.io/goversion dependency ... rsc.io/goversion is really expensive. Running version.ReadExe on tailscaled on darwin allocates 47k objects, almost 11mb. All we want is the module info. For that, all we need to do is scan through the binary looking for the magic start/end strings and then grab the bytes in between them. We can do that easily and quickly with nothing but a 64k buffer. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
David Crawshaw	360223fccb	types/dnstype: introduce new package for Resolver ... So the type can be used in net/dns without introducing a tailcfg dependency. For #2596 Signed-off-by: David Crawshaw <crawshaw@tailscale.com>	3 years ago
Josh Bleecher Snyder	eee6b85b9b	cmd/tailscaled: don't require root for --cleanup ... Without this, the integration tests fail locally for me: --- FAIL: TestCollectPanic (7.61s) integration.go:74: built [tailscale.com/cmd/tailscaled tailscale.com/cmd/tailscale] in 1.59s integration_test.go:102: initial run: tailscaled requires root; use sudo tailscaled (or use --tun=userspace-networking) integration_test.go:108: cleanup failed: exit status 1: "tailscaled requires root; use sudo tailscaled (or use --tun=userspace-networking)\n" stuntest.go:64: STUN server shutdown FAIL FAIL tailscale.com/tstest/integration 9.678s FAIL Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Josh Bleecher Snyder	a5da4ed981	all: gofmt with Go 1.17 ... This adds "//go:build" lines and tidies up existing "// +build" lines. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Brad Fitzpatrick	a729070252	net/tstun: add start of Linux TAP support, with DHCP+ARP server ... Still very much a prototype (hard-coded IPs, etc) but should be non-invasive enough to submit at this point and iterate from here. Updates #2589 Co-Author: David Crawshaw <crawshaw@tailscale.com> Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	fd7b738e5b	derp: use pad32 package for padding, reduce duplication ... Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	fdc081c291	net/portmapper: fix UPnP probing, work against all ports ... Prior to Tailscale 1.12 it detected UPnP on any port. Starting with Tailscale 1.11.x, it stopped detecting UPnP on all ports. Then start plumbing its discovered Location header port number to the code that was assuming port 5000. Fixes #2109 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	1db9032ff5	cmd/tailscaled: let portmap debug mode have an gateway/IP override knob ... For testing pfSense clients "behind" pfSense on Digital Ocean where the main interface still exists. This is easier for debugging. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	31ea073a73	cmd/tailscaled: add debug -portmap mode ... Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
David Crawshaw	3e039daf95	logpolicy: actually collect panics ... (Written with Josh) For #2544 Signed-off-by: David Crawshaw <crawshaw@tailscale.com>	3 years ago
Josh Bleecher Snyder	9da4181606	tstime/rate: new package ... This is a simplified rate limiter geared for exactly our needs: A fast, mono.Time-based rate limiter for use in tstun. It was generated by stripping down the x/time/rate rate limiter to just our needs and switching it to use mono.Time. It removes one time.Now call per packet. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Josh Bleecher Snyder	8a3d52e882	wgengine/magicsock: use mono.Time ... magicsock makes multiple calls to Now per packet. Move to mono.Now. Changing some of the calls to use package mono has a cascading effect, causing non-per-packet call sites to also switch. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Josh Bleecher Snyder	c2202cc27c	net/tstun: use mono.Time ... There's a call to Now once per packet. Move to mono.Now. Though the current implementation provides high precision, we document it to be coarse, to preserve the ability to switch to a coarse monotonic time later. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Joe Tsai	d145c594ad	util/deephash: improve cycle detection (#2470) ... The previous algorithm used a map of all visited pointers. The strength of this approach is that it quickly prunes any nodes that we have ever visited before. The detriment of the approach is that pruning is heavily dependent on the order that pointers were visited. This is especially relevant for hashing a map where map entries are visited in a non-deterministic manner, which would cause the map hash to be non-deterministic (which defeats the point of a hash). This new algorithm uses a stack of all visited pointers, similar to how github.com/google/go-cmp performs cycle detection. When we visit a pointer, we push it onto the stack, and when we leave a pointer, we pop it from the stack. Before visiting a pointer, we first check whether the pointer exists anywhere in the stack. If yes, then we prune the node. The detriment of this approach is that we may hash a node more often than before since we do not prune as aggressively. The set of visited pointers up until any node is only the path of nodes up to that node and not any other pointers that may have been visited elsewhere. This provides us deterministic hashing regardless of visit order. We can now delete hashMapFallback and associated complexity, which only exists because the previous approach was non-deterministic in the presence of cycles. This fixes a failure of the old algorithm where obviously different values are treated as equal because the pruning was too aggresive. See https://github.com/tailscale/tailscale/issues/2443#issuecomment-883653534 The new algorithm is slightly slower since it prunes less aggresively: name old time/op new time/op delta Hash-8 66.1µs ± 1% 68.8µs ± 1% +4.09% (p=0.000 n=19+19) HashMapAcyclic-8 63.0µs ± 1% 62.5µs ± 1% -0.76% (p=0.000 n=18+19) TailcfgNode-8 9.79µs ± 2% 9.88µs ± 1% +0.95% (p=0.000 n=19+17) HashArray-8 643ns ± 1% 653ns ± 1% +1.64% (p=0.000 n=19+19) However, a slower but more correct algorithm seems more favorable than a faster but incorrect algorithm. Signed-off-by: Joe Tsai <joetsai@digital-static.net>	3 years ago
Brad Fitzpatrick	ed8587f90d	wgengine/router: take a link monitor ... Prep for #1591 which will need to make Linux's router react to changes that the link monitor observes. The router package already depended on the monitor package transitively. Now it's explicit. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	7f7a81e5ae	cmd/tailscaled: add func to create ipnserver.Opts ... To unify the Windows service and non-service/non-Windows paths a bit. And provides a way to make Linux act like Windows for testing. (notably, for testing the fix to #2137) One perhaps visible change of this is that tailscaled.exe when run in cmd.exe/powershell (not as a Windows Service) no longer uses the "_daemon" autostart key. But in addition to being naturally what falls out of this change, that's also what Windows users would likely want, as otherwise the unattended mode user is ignored when the "_daemon" autostart key is specified. Notably, this would let people debug what their normally-run-as-a-service tailscaled is doing, even when they're running in Unattended Mode. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	ec4d721572	cmd/tailscaled: use state key constant from ipn package ... Rather than redefining it again. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
julianknodt	1bb6abc604	net/portmapper: add upnp port mapping ... Add in UPnP portmapping, using goupnp library in order to get the UPnP client and run the portmapping functions. This rips out anywhere where UPnP used to be in portmapping, and has a flow separate from PMP and PCP. RELNOTE=portmapper now supports UPnP mappings Fixes #682 Updates #2109 Signed-off-by: julianknodt <julianknodt@gmail.com>	3 years ago
Christine Dodrill	a19eea965f	tstest/integration/vms: use an in-process logcatcher (#2360) ... This adapts the existing in-process logcatcher from tstest/integration into a public type and uses it on the side of testcontrol. This also fixes a bug in the Alpine Linux OpenRC unit that makes every value in `/etc/default/tailscaled` exported into tailscaled's environment, a-la systemd [Service].EnviromentFile. Signed-off-by: Christine Dodrill <xe@tailscale.com>	3 years ago
Brad Fitzpatrick	700badd8f8	util/deephash: move internal/deephash to util/deephash ... No code changes. Just a minor package doc addition about lack of API stability.	3 years ago
Maisem Ali	ec52760a3d	wgengine/router_windows: support toggling local lan access when using ... exit nodes. Signed-off-by: Maisem Ali <maisem@tailscale.com>	3 years ago
julianknodt	506c2fe8e2	cmd/tailscale: make netcheck use active DERP map, delete static copy ... After allowing for custom DERP maps, it's convenient to be able to see their latency in netcheck. This adds a query to the local tailscaled for the current DERPMap. Updates #1264 Signed-off-by: julianknodt <julianknodt@gmail.com>	3 years ago
Brad Fitzpatrick	3910c1edaf	net/socks5/tssocks: add new package, move SOCKS5 glue out of tailscaled ... Prep for #1970, #2264, #2268 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	82e15d3450	cmd/tailscaled: log SOCKS5 port when port 0 requested ... Part of #2158 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	10d7c2583c	net/dnsfallback: don't depend on derpmap.Prod ... Move derpmap.Prod to a static JSON file (go:generate'd) instead, to make its role explicit. And add a TODO about making dnsfallback use an update-over-time DERP map file instead of a baked-in one. Updates #1264 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
julianknodt	148602a89a	derp,cmd/derper: allow server to verify clients ... This adds a flag to the DERP server which specifies to verify clients through a local tailscaled. It is opt-in, so should not affect existing clients, and is mainly intended for users who want to run their own DERP servers. It assumes there is a local tailscaled running and will attempt to hit it for peer status information. Updates #1264 Signed-off-by: julianknodt <julianknodt@gmail.com>	3 years ago
Brad Fitzpatrick	38be964c2b	go.mod: update netstack ... Fixes a atomic alignment crash on 32-bit machines. Fixes #2129 Fixes tailscale/tailscale-synology#66 (same) Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Denton Gentry	ad288baaea	net/interfaces: use IPv4 link local if nothing better ... The only connectivity an AWS Lambda container has is an IPv4 link-local 169.254.x.x address using NAT: 12: vtarget_1@if11: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000 link/ether 7e:1c:3f:00:00:00 brd ff:ff:ff:ff:ff:ff link-netnsid 1 inet 169.254.79.1/32 scope global vtarget_1 valid_lft forever preferred_lft forever If there are no other IPv4/v6 addresses available, and we are running in AWS Lambda, allow IPv4 169.254.x.x addresses to be used. ---- Similarly, a Google Cloud Run container's only connectivity is a Unique Local Address fddf:3978:feb1:d745::c001/128. If there are no other addresses available then allow IPv6 Unique Local Addresses to be used. We actually did this in an earlier release, but now refactor it to work the same way as the IPv4 link-local support is being done. Signed-off-by: Denton Gentry <dgentry@tailscale.com>	3 years ago
Brad Fitzpatrick	03311bb0d6	hostinfo: add hostinfo package, move stuff out of controlclient ... And make it cheaper, so other parts of the code can check the environment. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
David Anderson	ac07ff43bf	cmd/tailscaled: start after NetworkManager and systemd-resolved. ... The dependency is a "soft" ordering dependency only, meaning that tailscaled will start after those services if those services were going to be run anyway, but doesn't force either of them to run. That's why it's safe to specify this dependency unconditionally, even for systems that don't run those services. Updates #2127. Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago