756 Commits (63c00764e18e63a910de82739f4bec0a990f73fe)

Author	SHA1	Message	Date
Brad Fitzpatrick	471f0c470a	wgengine/monitor: skip some macOS route updates, fix debounce regression ... Debound was broken way back in 5c1e443d34 and we never noticed. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	f304a45481	wgengine/monitor: add skipped failing test for Darwin route message bug ... Updates #1416 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	31721759f3	wgengine/monitor: don't return nil, nil in darwin monitor ... We used to allow that, but now it just crashes. Separately I need to figure out why it got into this path at all, which is #1416. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Christine Dodrill	b89c757817	wgengine/tsdns: explicitly reject .onion lookups ... Tor has a location-hidden service feature that enables users to host services from inside the Tor network. Each of these gets a unique DNS name that ends with .onion. As it stands now, if a misbehaving application somehow manages to make a .onion DNS request to our DNS server, we will forward that to the DNS server, which could leak that to malicious third parties. See the recent bug Brave had with this[1] for more context. RFC 7686 suggests that name resolution APIs and libraries MUST respond with NXDOMAIN unless they can actually handle Tor lookups. We can't handle .onion lookups, so we reject them. [1]: https://twitter.com/albinowax/status/1362737949872431108 Fixes tailscale/corp#1351 Signed-off-by: Christine Dodrill <xe@tailscale.com>	4 years ago
Brad Fitzpatrick	24fa616e73	wgengine/monitor: make Darwin monitor shut down cleanly, add test ... Don't use os.NewFile or (*os.File).Close on the AF_ROUTE socket. It apparently does weird things to the fd and at least doesn't seem to close it. Just use the unix package. The test doesn't actually fail reliably before the fix, though. It was an attempt. But this fixes the integration tests. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	487c520109	wgengine: fix bug from earlier commit ... Commit e3df29d488 introduced this bug where the interfaces-were-changed-or-not bit got lost. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
David Anderson	793cb131f0	wgengine/router: toggle killswitch when using default routes on windows. ... Fixes #1398. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
Brad Fitzpatrick	e3df29d488	wgengine{,/monitor}: move interface state fetching/comparing to monitor ... Gets it out of wgengine so the Engine isn't responsible for being a callback registration hub for it. This also removes the Engine.LinkChange method, as it's no longer necessary. The monitor tells us about changes; it doesn't seem to need any help. (Currently it was only used by Swift, but as of 14dc790137 we just do the same from Go) Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	a038e8690c	wgengine/netstack: fix 32-bit build broken from prior commit ... Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	38dc6fe758	cmd/tailscaled, wgengine: remove --fake, replace with netstack ... And add a --socks5-server flag. And fix a race in SOCKS5 replies where the response header was written concurrently with the copy from the backend. Co-authored with Naman Sood. Updates #707 Updates #504 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	d74cddcc56	wgengine/netstack: add Magic DNS + DNS resolution to SOCKS5 dialing ... Updates #707 Updates #504 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	34188d93d4	wgengine/monitor: start moving interface state accessor into monitor ... Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	14dc790137	wgengine/monitor: make the darwin link monitor work in the sandbox too ... Previously tailscaled on macOS was running "/sbin/route monitor" as a child process, but child processes aren't allowed in the Network Extension / App Store sandbox. Instead, just do what "/sbin/route monitor" itself does: unix.Socket(unix.AF_ROUTE, unix.SOCK_RAW, 0) and read that. We also parse it now, but don't do anything with the parsed results yet. We will over time, as we have with Linux netlink messages over time. Currently any message is considered a signal to poll and see what changed. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	a55a03d5ff	wgengine: let LinkMonitor be passed in to NewUserspaceEngine ... Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	ee6475a44d	wgengine: unify NewUserspaceEngine, NewUserspaceEngineAdvanced ... Also rename EngineConfig to Config to avoid wgengine.EngineConfig stutter. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	dda03a911e	wgengine/monitor: change API to permit multiple independent callbakcks ... Currently it assumes exactly 1 registered callback. This changes it to support 0, 1, or more than 1. This is a step towards plumbing wgengine/monitor into more places (and moving some of wgengine's interface state fetching into monitor in a later step) Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	0eea490724	wgengine: also close link monitor on NewUserspaceEngineAdvanced error ... Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Naman Sood	fec9dcbda1	wgengine/netstack: start SOCKS5 server in netstack mode ... Updates #707 Updates #504 Signed-off-by: Naman Sood <mail@nsood.in>	4 years ago
Naman Sood	517c90d7e5	wgengine, cmd/tailscaled: refactor netstack, forward TCP to hello as demo (#1301) ... Updates #707 Updates #504 Signed-off-by: Naman Sood <mail@nsood.in>	4 years ago
Aleksandar Pesic	daf6de4f14	wgengine: make NewUserspaceEngine wait for TUN interface to be up on Windows ... Updates #474 Signed-off-by: Aleksandar Pesic <peske.nis@gmail.com>	4 years ago
Brad Fitzpatrick	ea3715e3ce	wgengine/magicsock: remove TODO about endpoints-over-DERP ... It was done in Tailscale 1.4 with CallMeMaybe disco messages containing endpoints. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
David Anderson	54d7070121	wgengine/router: correctly read IPv6 routes when diffing. ... Fixes #1185. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	2404c0ffad	ipn/ipnlocal: only filter out default routes when computing the local wg config. ... UIs need to see the full unedited netmap in order to know what exit nodes they can offer to the user. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
Brad Fitzpatrick	e9e4f1063d	wgengine/magicsock: fix discoEndpoint caching bug when a node key changes ... Fixes #1391 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	c64bd587ae	net/portmapper: add NAT-PMP client, move port mapping service probing ... * move probing out of netcheck into new net/portmapper package * use PCP ANNOUNCE op codes for PCP discovery, rather than causing short-lived (sub-second) side effects with a 1-second-expiring map + delete. * track when we heard things from the router so we can be less wasteful in querying the router's port mapping services in the future * use portmapper from magicsock to map a public port Fixes #1298 Fixes #1080 Fixes #1001 Updates #864 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
David Anderson	d038a5295d	wgengine/wglog: drop 1/s "interface is up" messages. ... Fixes #1388. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
Brad Fitzpatrick	188bb14269	wgengine: consistently close things when NewUserspaceEngineAdvanced errors ... Fixes #1363 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
David Anderson	6e42430ad8	wgengine/monitor: don't log any single-IP routes added to the tailscale table. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	df5adb2e23	wgengine/monitor: on linux, also monitor for IPv6 changes. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	b83c273737	wgengine/filter: use IPSet for localNets instead of prefixes. ... Part of #1177, preparing for doing fancier set operations on the allowed local nets. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
Brad Fitzpatrick	fd8e070d01	health, control/controlclient, wgengine: report when router unhealthy ... Updates tailscale/corp#1338 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	2d96215d97	wgengine/router: make Linux delRoute idempotent, cidrDiff fail late as possible ... This makes cidrDiff do as much as possible before failing, and makes a delete of an already-deleted rule be a no-op. We should never do this ourselves, but other things on the system can, and this should help us recover a bit. Also adds the start of root-requiring tests. TODO: hook into wgengine/monitor and notice when routes are changed behind our back, and invalidate our routes map and re-read from kernel (via the ip command) at least on the next reconfig call. Updates tailscale/corp#1338 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	96a488e37e	wgengine/router: simplify func normalizeCIDR using netaddr method	4 years ago
Brad Fitzpatrick	d98ef5699d	wgengine/filter: remove redundant code ... no generated code change.	4 years ago
Brad Fitzpatrick	65815cc1ac	wgengine/tsdns: skip test that requires local IPv6 when IPv6 unavailable ... Fixes #1292 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	36189e2704	wgengine/monitor: prevent shutdown hang in darwin link monitor	4 years ago
Brad Fitzpatrick	bbb4631e04	safesocket, wgengine: add some darwin failure diagnostic hints	4 years ago
Brad Fitzpatrick	4f7d60ad42	wgengine/monitor: add a darwin implementation for tailscaled mode ... Tangentially related to #987, #177, #594, #925, #505 Motivated by rebooting a launchd-controlled tailscaled and it going into SetNetworkUp(false) mode immediately because there really is no network up at system boot, but then it got stuck in that paused state forever, without a monitor implementation.	4 years ago
Josh Bleecher Snyder	c7e5ab8094	wgengine/magicsock: retry and re-send packets in TestTwoDevicePing ... When a handshake race occurs, a queued data packet can get lost. TestTwoDevicePing expected that the very first data packet would arrive. This caused occasional flakes. Change TestTwoDevicePing to repeatedly re-send packets and succeed when one of them makes it through. This is acceptable (vs making WireGuard not drop the packets) because this only affects communication with extremely old clients. And those extremely old clients will eventually connect, because the kernel will retry sends on timeout. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
Josh Bleecher Snyder	1632f9fd6b	wgengine/magicsock: reduce log spam during tests ... Only do the type assertion to *net.UDPAddr when addr is non-nil. This prevents a bunch of log spam during tests.	4 years ago
Josh Bleecher Snyder	88586ec4a4	wgengine/magicsock: remove an alloc from ReceiveIPvN ... We modified the standard net package to not allocate a *net.UDPAddr during a call to (*net.UDPConn).ReadFromUDP if the caller's use of the *net.UDPAddr does not cause it to escape. That is https://golang.org/cl/291390. This is the companion change to magicsock. There are two changes required. First, call ReadFromUDP instead of ReadFrom, if possible. ReadFrom returns a net.Addr, which is an interface, which always allocates. Second, reduce the lifetime of the returned *net.UDPAddr. We do this by immediately converting it into a netaddr.IPPort. We left the existing RebindingUDPConn.ReadFrom method in place, as it is required to satisfy the net.PacketConn interface. With the upstream change and both of these fixes in place, we have removed one large allocation per packet received. name old time/op new time/op delta ReceiveFrom-8 16.7µs ± 5% 16.4µs ± 8% ~ (p=0.310 n=5+5) name old alloc/op new alloc/op delta ReceiveFrom-8 112B ± 0% 64B ± 0% -42.86% (p=0.008 n=5+5) name old allocs/op new allocs/op delta ReceiveFrom-8 3.00 ± 0% 2.00 ± 0% -33.33% (p=0.008 n=5+5) Co-authored-by: Sonia Appasamy <sonia@tailscale.com> Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
Josh Bleecher Snyder	0c673c1344	wgengine/magicsock: unify on netaddr types in addrSet ... addrSet maintained duplicate lists of netaddr.IPPorts and net.UDPAddrs. Unify to use the netaddr type only. This makes (*Conn).ReceiveIPvN a bit uglier, but that'll be cleaned up in a subsequent commit. This is preparatory work to remove an allocation from ReceiveIPv4. Co-authored-by: Sonia Appasamy <sonia@tailscale.com> Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
Josh Bleecher Snyder	4cd9218351	wgengine/magicsock: prevent logging while running benchmarks ... Co-authored-by: Sonia Appasamy <sonia@tailscale.com> Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
Brad Fitzpatrick	88ab0173a7	wgengine/router: fix BSD router to support multiple local addrs, IPv6 ... Fixes #1201	4 years ago
Brad Fitzpatrick	917307a90c	wgengine/tstun: reply to MagicDNS pings ... Fixes #849 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Josh Bleecher Snyder	635e4c7435	wgengine/magicsock: increase legacy ping timeout again ... I based my estimation of the required timeout based on locally observed behavior. But CI machines are worse than my local machine. 16s was enough to reduce flakiness but not eliminate it. Bump it up again. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
Brad Fitzpatrick	1ec64bc94d	wgengine/router: add another Windows firewall rule to allow incoming UDP ... Based on @sailorfrag's research. Fixes #1312 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	7e201806b1	wgengine/magicsock: reconnect to DERP home after network comes back up ... Updates #1310	4 years ago
Brad Fitzpatrick	cbd6224ca4	wgengine/winnet: don't build on non-windows ... It only affects 'go install ./...', etc, and only on darwin/arm64 (M1 Macs) where the go-ole package doesn't compile. No need to build it. Updates #943	4 years ago
Brad Fitzpatrick	9b4e50cec0	wgengine/magicsock: fix typo in comment	4 years ago
Naman Sood	07c3df13c6	wgengine/tstun: inform userspaceEngine about injected outbound packets in tundev ... Signed-off-by: Naman Sood <mail@nsood.in>	4 years ago
Josh Bleecher Snyder	e7caad61fb	wgengine: remove IpcGetOperation filter ... This was in place because retrieved allowed_ips was very expensive. Upstream changed the data structure to make them cheaper to compute. This commit is an experiment to find out whether they're now cheap enough. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
Brad Fitzpatrick	6b365b0239	wgengine/magicsock: fix DERP reader hang regression during concurrent reads ... Fixes #1282 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Josh Bleecher Snyder	e1f773ebba	wgengine/magicsock: allow more time for pings to transit ... We removed the "fast retry" code from our wireguard-go fork. As a result, pings can take longer to transit when retries are required. Allow that. Fixes #1277 Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
Brad Fitzpatrick	6d2b8df06d	wgengine/magicsock: add disabled failing (deadlocking) test for #1282 ... The fix can make this test run unconditionally. This moves code from 5c619882bc for testability but doesn't fix it yet. The #1282 problem remains (when I wrote its wake-up mechanism, I forgot there were N DERP readers funneling into 1 UDP reader, and the code just isn't correct at all for that case). Also factor out some test helper code from BenchmarkReceiveFrom. The refactoring in magicsock.go for testability should have no behavior change.	4 years ago
Brad Fitzpatrick	1e7a35b225	types/netmap: split controlclient.NetworkMap off into its own leaf package ... Updates #1278 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	6064b6ff47	wgengine/wgcfg/nmcfg: split control/controlclient/netmap.go into own package ... It couldn't move to ipnlocal due to test dependency cycles. Updates #1278 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
David Anderson	ace57d7627	wgengine/magicsock: set a dummy private key in benchmark. ... Magicsock started dropping all traffic internally when Tailscale is shut down, to avoid spurious wireguard logspam. This made the benchmark not receive anything. Setting a dummy private key is sufficient to get magicsock to pass traffic for benchmarking purposes. Fixes #1270. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
Josh Bleecher Snyder	aa6856a9eb	wgengine: adapt to wireguard-go changes ... Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
Brad Fitzpatrick	d76334d2f0	ipn: split LocalBackend off into new ipn/ipnlocal package ... And move a couple other types down into leafier packages. Now cmd/tailscale doesn't bring in netlink, magicsock, wgengine, etc. Fixes #1181 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	70eb05fd47	wgengine: access flow pending problem with lock held ... Missed review feedback from just-submitted d37058af72.	4 years ago
Brad Fitzpatrick	d37058af72	net/packet: add some more TSMP packet reject reasons and MaybeBroken bit ... Unused for now, but I want to backport this commit to 1.4 so 1.6 can start sending these and then at least 1.4 logs will stringify nicely. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	f7eed25bb9	wgengine/magicsock: filter disco packets and packets when stopped from wireguard ... Fixes #1167 Fixes tailscale/corp#219 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Josh Bleecher Snyder	e8cd7bb66f	tstest: simplify goroutine leak tests ... Use tb.Cleanup to simplify both the API and the implementation. One behavior change: When the number of goroutines shrinks, don't log. I've never found these logs to be useful, and they frequently add noise. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
Brad Fitzpatrick	a2aa6cd2ed	wgengine/router: clarify disabled IPv6 message on Linux	4 years ago
David Anderson	267531e4f8	wgengine/router: probe better for v6 policy routing support. ... Previously we disabled v6 support if the disable_policy knob was missing in /proc, but some kernels support policy routing without exposing the toggle. So instead, treat disable_policy absence as a "maybe", and make the direct `ip -6 rule` probing a bit more elaborate to compensate. Fixes #1241. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
Josh Bleecher Snyder	717c715c96	wgengine/wglog: don't log failure to send data packets ... Fixes #1239	4 years ago
Josh Bleecher Snyder	dd10babaed	wgenginer/magicsock: remove Addrs methods ... They are now unused. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
Brad Fitzpatrick	761188e5d2	wgengine/wgcfg: fix validateEndpoints of empty string ... Updates tailscale/corp#1238	4 years ago
Josh Bleecher Snyder	fe7c3e9c17	all: move wgcfg from wireguard-go ... This is mostly code movement from the wireguard-go repo. Most of the new wgcfg package corresponds to the wireguard-go wgcfg package. wgengine/wgcfg/device{_test}.go was device/config{_test}.go. There were substantive but simple changes to device_test.go to remove internal package device references. The API of device.Config (now wgcfg.DeviceConfig) grew an error return; we previously logged the error and threw it away. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
Brad Fitzpatrick	c7fc4a06da	wgengine/router: don't configure IPv6 on Linux when IPv6 is unavailable ... Fixes #1214 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	4d943536f1	wgengine: don't leak TUN device in NewUserspaceEngine error path ... Updates #1187 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	9f5b0d058f	wgengine: fix bugs from earlier fix ... Fixes a regression from e970ed0995 that wasn't covered by tests in this repo. (Our end-to-end tests in another repo caught this.) Updates #1204	4 years ago
Brad Fitzpatrick	e970ed0995	wgengine: fix crash reading long UAPI lines from legacy peers ... Also don't log.Fatalf in a function returning an error. Fixes #1204 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	4fea604979	wgengine/router: stop setPrivateNetwork goroutine on configureInterface failure ... On Windows, configureInterface starts a goroutine reconfiguring the Windows firewall. But if configureInterface fails later, that goroutine kept running and likely failing forever, spamming logs. Make it stop quietly if its launching goroutine filed.	4 years ago
David Anderson	9f7cbf6cf1	wgengine/filter: add a Clone method. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
Brad Fitzpatrick	e7bf144c3f	ipn, wgengine/filter: fix Shields Up recent regression and old bug ... Fixes #1192 (regression) Fixes #1193 (old bug)	4 years ago
Brad Fitzpatrick	97496a83af	wgengine/tstun: also support DropSilently on PostFilterIn ... Not a problem (yet). But should be consistent with other places that support both types of drops.	4 years ago
Josh Bleecher Snyder	d5baeeed5c	wgengine: use Tailscale-style peer identifiers in logs ... Rewrite log lines on the fly, based on the set of known peers. This enables us to use upstream wireguard-go logging, but maintain the Tailscale-style peer public key identifiers that the rest of our systems (and people) expect. Fixes #1183 Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
Brad Fitzpatrick	9541886856	wgengine/magicsock: disable regular STUNs for all platforms by default ... Reduces background CPU & network. Updates #1034 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	c55d26967b	wgengine/magicsock: log more details of endpoints learned over disco ... Also, don't try to use IPv6 LinkLocalUnicast addresses for now. Like endpoints exchanged with control, we share them but don't yet use them. Updates #1172	4 years ago
Brad Fitzpatrick	359055d3fa	wgengine/magicsock: fix logging regression ... c8c493f3d9 made it always say `created=false` which scared me when I saw it, as that would've implied things were broken much worse. Fortunately the logging was just wrong.	4 years ago
Brad Fitzpatrick	edf64e0901	wgengine/magicsock: send, use endpoints in CallMeMaybe messages ... Fixes #1172 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	b5b4992eff	disco: support parsing/encoding endpoints in call-me-maybe frames ... Updates #1172 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Josh Bleecher Snyder	d3dd7c6270	wgengine/magicsock: make legacy DstToString match Addrs ... DstToString is used in two places in wireguard-go: Logging and uapi. We are switching to use uapi for wireguard-go config. To preserve existing behavior, we need the full set of addrs. And for logging, having the full set of addrs seems useful. (The Addrs method itself is slated for removal. When that happens, the implementation will move to DstToString.) Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
Brad Fitzpatrick	187e22a756	wgengine/magicsock: don't run the DERP cleanup so often ... To save CPU and wakeups, don't run the DERP cleanup timer regularly unless there is a non-home DERP connection open. Also eliminates the goroutine, moving to a time.AfterFunc. Updates #1034 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Josh Bleecher Snyder	5fe5402fcd	Revert "wgengine/magicsock: shortcircuit discoEndpoint.heartbeat when its connection is closed" ... This reverts commit 08baa17d9a. It caused deadlocks due to lock ordering violations. It was not the right fix, and thus should simply be reverted while we look for the right fix (if we haven't already found it in the interim; we've fixed other logging-after-test issues). Fixes #1161	4 years ago
Josh Bleecher Snyder	e4c075cd95	wgengine/magicsock: prevent log-after-test in TestTwoDevicePing	4 years ago
Brad Fitzpatrick	edce91a8a6	wgengine/magicsock: fix a naked return bug/crash where we returned (nil, true) ... The 'ok' from 'ipp, ok :=' above was the result parameter ok. Whoops.	4 years ago
Brad Fitzpatrick	51bd1feae4	wgengine/magicsock: add single element IPPort->endpoint cache in receive path ... name old time/op new time/op delta ReceiveFrom-4 21.8µs ± 2% 20.9µs ± 2% -4.27% (p=0.000 n=10+10) Updates #414 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	5c619882bc	wgengine/magicsock: simplify ReceiveIPv4+DERP path ... name old time/op new time/op delta ReceiveFrom-4 35.8µs ± 3% 21.9µs ± 5% -38.92% (p=0.008 n=5+5) Fixes #1145 Updates #414 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
David Anderson	9936cffc1a	wgengine: correctly track all node IPs in lazy config. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
Brad Fitzpatrick	3fa86a8b23	wgengine/magicsock: use relatively new netaddr.IPPort.IsZero method	4 years ago
Brad Fitzpatrick	4811236189	wgengine/magicsock: speed up BenchmarkReceiveFrom, store context.Done chan ... context.cancelCtx.Done involves a mutex and isn't as cheap as I previously assumed. Convert the donec method into a struct field and store the channel value once. Our one magicsock.Conn gets one pointer larger, but it cuts ~1% of the CPU time of the ReceiveFrom benchmark and removes a bubble from the --svg output :)	4 years ago
Denton Gentry	8578b0445d	tstun: add test to send a packet after Close() ... This test serves two purposes: + check that Write() returns an error if the tstun has been closed. + ensure that the close-related code in tstun is exercised in a test case. We were getting spurious code coverage adds/drops based on timing of when the test case finished. Signed-off-by: Denton Gentry <dgentry@tailscale.com>	4 years ago
Josh Bleecher Snyder	ed2169ae99	wgengine/magicsock: prevent logging after TestActiveDiscovery completes	4 years ago
Josh Bleecher Snyder	63af950d8c	wgengine/magicsock: adapt to wireguard-go without UpdateDst ... 22507adf54 stopped relying on our fork of wireguard-go's UpdateDst callback. As a result, we can unwind that code, and the extra return value of ReceiveIPv{4,6}. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
Denton Gentry	23c2dc2165	magicksock: remove TestConnClosing. (#1140) ... Test is flakey, remove it and figure out what to do differently later. Signed-off-by: Denton Gentry <dgentry@tailscale.com>	4 years ago
David Anderson	e23b4191c4	wgengine/magicsock: disable legacy networking everywhere except TwoDevicePing. ... TwoDevicePing is explicitly testing the behavior of the legacy codepath, everything else is happy to assume that code no longer exists. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	0733c5d2e0	wgengine/magicsock: disable legacy behavior in a few more tests. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	57d95dd005	wgengine/magicsock: default legacy networking to off for some tests. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	a2463e8948	wgengine/magicsock: add an option to disable legacy peer handling. ... Used in tests to ensure we're not relying on behavior we're going to remove eventually. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	d456bfdc6d	wgengine/magicsock: fix BenchmarkReceiveFrom. ... Previously, this benchmark relied on behavior of the legacy receive codepath, which I changed in 22507adf. With this change, the benchmark instead relies on the new active discovery path. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
Josh Bleecher Snyder	2d837f79dc	wgengine/magicsock: close test loggers once we're done with them ... This is a big hammer approach to helping with #1132. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
Josh Bleecher Snyder	08baa17d9a	wgengine/magicsock: shortcircuit discoEndpoint.heartbeat when its connection is closed ... This prevents us from continuing to do unnecessary work (including logging) after the connection has closed. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
Josh Bleecher Snyder	7c76435bf7	wgengine/magicsock: simplify ... Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
Josh Bleecher Snyder	d2529affa2	wgengine/magicsock: quiet wireguard-go logging in tests ... We already do this in newUserspaceEngineAdvanced. Apply it to newMagicStack as well. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
Josh Bleecher Snyder	3ad7c2133a	wgengine/userspace: make wireguard-go log silencing include peer routines ... Also suppress log lines like: peer(Kksd…ySmc) - Routine: sequential sender - stopped Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
Brad Fitzpatrick	b560386c1a	net/packet, wgengine, tstun: add inter-node TSMP protocol for connect errors ... This adds a new IP Protocol type, TSMP on protocol number 99 for sending inter-tailscale messages over WireGuard, currently just for why a peer rejects TCP SYNs (ACL rejection, shields up, and in the future: nothing listening, something listening on that port but wrong interface, etc) Updates #1094 Updates tailscale/corp#1185 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Naman Sood	420c7a35e2	wgengine/netstack: use tailscale IPs instead of a hardcoded one (#1131) ... Signed-off-by: Naman Sood <mail@nsood.in>	4 years ago
Brad Fitzpatrick	a4b39022e0	wgengine/tsdns: fix MagicDNS lookups of shared nodes ... Fixes tailscale/corp#1184	4 years ago
Alex Brainman	6e4231c03c	wgengine/router/dns: remove unused code ... Commit 68ddf1 removed code that reads `SOFTWARE\Tailscale IPN\SearchList` registry value. But the commit left code that writes that value. So now this package writes and never reads the value. Remove the code to stop pointless work. Updates #853 Signed-off-by: Alex Brainman <alex.brainman@gmail.com>	4 years ago
Josh Bleecher Snyder	654b5f1570	all: convert from []wgcfg.Endpoint to string ... This eliminates a dependency on wgcfg.Endpoint, as part of the effort to eliminate our wireguard-go fork. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
David Anderson	9abcb18061	wgengine/magicsock: import more of wireguard-go, update docstrings. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	22507adf54	wgengine/magicsock: stop depending on UpdateDst in legacy codepaths. ... This makes connectivity between ancient and new tailscale nodes slightly worse in some cases, but only in cases where the ancient version would likely have failed to get connectivity anyway. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
Josh Bleecher Snyder	020084e84d	wgengine: adapt to removal of wgcfg.Key in wireguard-go	4 years ago
Smitty	b2a08ddacd	wgengine/tsdns: return NOERROR instead of NOTIMP for most records ... This is what every other DNS resolver I could find does, so tsdns should do it to. This also helps avoid weird error messages about non-existent records being unimplemented, and thus fixes #848. Signed-off-by: Smitty <me@smitop.com>	4 years ago
Denton Gentry	8349e10907	magicsock: add description of testClosingContext ... Signed-off-by: Denton Gentry <dgentry@tailscale.com>	4 years ago
Denton Gentry	2e9728023b	magicsock: test error case in sendDiscoMessage ... In sendDiscoMessage there is a check of whether the connection is closed, which is not being reliably exercised by other tests. This shows up in code coverage reports, the lines of code in sendDiscoMessage are alternately added and subtracted from code coverage. Add a test to specifically exercise and verify this code path. Signed-off-by: Denton Gentry <dgentry@tailscale.com>	4 years ago
Denton Gentry	0aa55bffce	magicsock: test error case in derpWriteChanOfAddr ... In derpWriteChanOfAddr when we call derphttp.NewRegionClient(), there is a check of whether the connection is already errored and if so it returns before grabbing the lock. The lock might already be held and would be a deadlock. This corner case is not being reliably exercised by other tests. This shows up in code coverage reports, the lines of code in derpWriteChanOfAddr are alternately added and subtracted from code coverage. Add a test to specifically exercise this code path, and verify that it doesn't deadlock. This is the best tradeoff I could come up with: + the moment code calls Err() to check if there is an error, we grab the lock to make sure it would deadlock if it tries to grab the lock itself. + if a new call to Err() is added in this code path, only the first one will be covered and the rest will not be tested. + this test doesn't verify whether code is checking for Err() in the right place, which ideally I guess it would. Signed-off-by: Denton Gentry <dgentry@tailscale.com>	4 years ago
Brad Fitzpatrick	85e54af0d7	wgengine: on TCP connect fail/timeout, log some clues about why it failed ... So users can see why things aren't working. A start. More diagnostics coming. Updates #1094	4 years ago
Brad Fitzpatrick	5eeaea9ef9	net/packet: add TCPFlag type and some more constants ... Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	f85769b1ed	wgengine/magicsock: drop netaddr.IPPort cache ... netaddr.IP no longer allocates, so don't need a cache or all its associated code/complexity. This totally removes groupcache/lru from the deps. Also go mod tidy.	4 years ago
Brad Fitzpatrick	4d15e954bd	net/flowtrack: add new package to specialize groupcache/lru key type ... Reduces allocs. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Naman Sood	f69e46175d	wengine/netstack: bump gvisor to latest version ... * wengine/netstack: bump gvisor to latest version Signed-off-by: Naman Sood <naman@tailscale.com> * update dependencies Signed-off-by: Naman Sood <naman@tailscale.com> * Don't change hardcoded IP Signed-off-by: Naman Sood <naman@tailscale.com>	4 years ago
Brad Fitzpatrick	8b0112649a	wgengine/netstack: don't build netstack on 32-bit platforms ... See google/gvisor#5241	4 years ago
Brad Fitzpatrick	5aa5db89d6	cmd/tailscaled, wgengine/netstack: add start of gvisor userspace netstack work ... Not usefully functional yet (mostly a proof of concept), but getting it submitted for some work @namansood is going to do atop this. Updates #707 Updates #634 Updates #48 Updates #835	4 years ago
Brad Fitzpatrick	5efb0a8bca	cmd/tailscale: change formatting of "tailscale status" ... * show DNS name over hostname, removing domain's common MagicDNS suffix. only show hostname if there's no DNS name. but still show shared devices' MagicDNS FQDN. * remove nerdy low-level details by default: endpoints, DERP relay, public key. They're available in JSON mode still for those who need them. * only show endpoint or DERP relay when it's active with the goal of making debugging easier. (so it's easier for users to understand what's happening) The asterisks are gone. * remove Tx/Rx numbers by default for idle peers; only show them when there's traffic. * include peers' owner login names * add CLI option to not show peers (matching --self=true, --peers= also defaults to true) * sort by DNS/host name, not public key * reorder columns	4 years ago
Brad Fitzpatrick	b5b9866ba2	wgengine/magicsock: copy self DNS name to PeerStatus, re-fill OS ... The OS used to be sent back from the server but that has since been removed as being redundant.	4 years ago
Josh Bleecher Snyder	1271e135cd	wgengine/tstun: initialize wireguard-go TUN parameters ... This will enable us to remove the corresponding code from our fork of wireguard-go. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
Josh Bleecher Snyder	1e4604f60e	wgengine: quiet some wireguard-go logging ... The log lines that wireguard-go prints as it starts and stops its worker routines are mostly noise. They also happen after other work is completed, which causes failures in some of the log testing packages. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
Josh Bleecher Snyder	e0c4ffa71f	wgengine/tsdns: respond with any available addrs for ALL queries ... This appears to have been the intent of the previous code, but in practice, it only returned A records. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
Denton Gentry	df64b7abf8	Add IPv6 Reverse DNS Lookup test. ... To be honest I'm not fond of Golden Bytes tests like this, but not so much as to want to rewrite the whole test. The DNS byte format is essentially immutable at this point, the encoded bytes aren't going to change. The rest of the test assumptions about hostnames might, but we can fix that when it comes. Signed-off-by: Denton Gentry <dgentry@tailscale.com>	4 years ago
Alex Brainman	9985b3f1ed	wgengine/monitor: close closeHandle ... eccc167 introduced closeHandle which opened the handle, but never closed it. Windows handles should be closed. Updates #921 Signed-off-by: Alex Brainman <alex.brainman@gmail.com>	4 years ago
Brad Fitzpatrick	e8ae355bb8	ipn: delete domainsForProxying, require explicit DNS search domains (mapver 9) (#1078) ... Previously the client had heuristics to calculate which DNS search domains to set, based on the peers' names. Unfortunately that prevented us from doing some things we wanted to do server-side related to node sharing. So, bump MapRequest.Version to 9 to signal that the client only uses the explicitly configured DNS search domains and doesn't augment it with its own list. Updates tailscale/corp#1026 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
David Anderson	86fe22a1b1	Update netaddr, and adjust wgengine/magicsock due to API change. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
Josh Bleecher Snyder	56a7652dc9	wgkey: new package ... This is a replacement for the key-related parts of the wireguard-go wgcfg package. This is almost a straight copy/paste from the wgcfg package. I have slightly changed some of the exported functions and types to avoid stutter, added and tweaked some comments, and removed some now-unused code. To avoid having wireguard-go depend on this new package, wgcfg will keep its key types. We translate into and out of those types at the last minute. These few remaining uses will be eliminated alongside the rest of the wgcfg package. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
Brad Fitzpatrick	0d94fe5f69	wgengine/router: disable IPv6 on Linux if ip rule -6 fails (#1074) ... Updates #562 Fixes #973 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Josh Bleecher Snyder	2fe770ed72	all: replace wgcfg.IP and wgcfg.CIDR with netaddr types ... Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
Matt Layher	bfbd6b9241	go.mod: bump github.com/mdlayher/netlink to v1.2.0 ... Signed-off-by: Matt Layher <mdlayher@gmail.com>	4 years ago
Brad Fitzpatrick	80c94168ae	wgengine: finish updating isTrimmablePeer ... I accidentally merged Dave's change with the XXXX DO NOT SUBMIT comment in it.	4 years ago
David Anderson	cb96b14bf4	net/packet: remove the custom IP4/IP6 types in favor of netaddr.IP. ... Upstream netaddr has a change that makes it alloc-free, so it's safe to use in hot codepaths. This gets rid of one of the many IP types in our codebase. Performance is currently worse across the board. This is likely due in part to netaddr.IP being a larger value type (4b -> 24b for IPv4, 16b -> 24b for IPv6), and in other part due to missing low-hanging fruit optimizations in netaddr. However, the regression is less bad than it looks at first glance, because we'd micro-optimized packet.IP* in the past few weeks. This change drops us back to roughly where we were at the 1.2 release, but with the benefit of a significant code and architectural simplification. name old time/op new time/op delta pkg:tailscale.com/net/packet goos:linux goarch:amd64 Decode/tcp4-8 12.2ns ± 5% 29.7ns ± 2% +142.32% (p=0.008 n=5+5) Decode/tcp6-8 12.6ns ± 3% 65.1ns ± 2% +418.47% (p=0.008 n=5+5) Decode/udp4-8 11.8ns ± 3% 30.5ns ± 2% +157.94% (p=0.008 n=5+5) Decode/udp6-8 27.1ns ± 1% 65.7ns ± 2% +142.36% (p=0.016 n=4+5) Decode/icmp4-8 24.6ns ± 2% 30.5ns ± 2% +23.65% (p=0.016 n=4+5) Decode/icmp6-8 22.9ns ±51% 65.5ns ± 2% +186.19% (p=0.008 n=5+5) Decode/igmp-8 18.1ns ±44% 30.2ns ± 1% +66.89% (p=0.008 n=5+5) Decode/unknown-8 20.8ns ± 1% 10.6ns ± 9% -49.11% (p=0.016 n=4+5) pkg:tailscale.com/wgengine/filter goos:linux goarch:amd64 Filter/icmp4-8 30.5ns ± 1% 77.9ns ± 3% +155.01% (p=0.008 n=5+5) Filter/tcp4_syn_in-8 43.7ns ± 3% 123.0ns ± 3% +181.72% (p=0.008 n=5+5) Filter/tcp4_syn_out-8 24.5ns ± 2% 45.7ns ± 6% +86.22% (p=0.008 n=5+5) Filter/udp4_in-8 64.8ns ± 1% 210.0ns ± 2% +223.87% (p=0.008 n=5+5) Filter/udp4_out-8 119ns ± 0% 278ns ± 0% +133.78% (p=0.016 n=4+5) Filter/icmp6-8 40.3ns ± 2% 204.4ns ± 4% +407.70% (p=0.008 n=5+5) Filter/tcp6_syn_in-8 35.3ns ± 3% 199.2ns ± 2% +464.95% (p=0.008 n=5+5) Filter/tcp6_syn_out-8 32.8ns ± 2% 81.0ns ± 2% +147.10% (p=0.008 n=5+5) Filter/udp6_in-8 106ns ± 2% 290ns ± 2% +174.48% (p=0.008 n=5+5) Filter/udp6_out-8 184ns ± 2% 314ns ± 3% +70.43% (p=0.016 n=4+5) pkg:tailscale.com/wgengine/tstun goos:linux goarch:amd64 Write-8 9.02ns ± 3% 8.92ns ± 1% ~ (p=0.421 n=5+5) name old alloc/op new alloc/op delta pkg:tailscale.com/net/packet goos:linux goarch:amd64 Decode/tcp4-8 0.00B 0.00B ~ (all equal) Decode/tcp6-8 0.00B 0.00B ~ (all equal) Decode/udp4-8 0.00B 0.00B ~ (all equal) Decode/udp6-8 0.00B 0.00B ~ (all equal) Decode/icmp4-8 0.00B 0.00B ~ (all equal) Decode/icmp6-8 0.00B 0.00B ~ (all equal) Decode/igmp-8 0.00B 0.00B ~ (all equal) Decode/unknown-8 0.00B 0.00B ~ (all equal) pkg:tailscale.com/wgengine/filter goos:linux goarch:amd64 Filter/icmp4-8 0.00B 0.00B ~ (all equal) Filter/tcp4_syn_in-8 0.00B 0.00B ~ (all equal) Filter/tcp4_syn_out-8 0.00B 0.00B ~ (all equal) Filter/udp4_in-8 0.00B 0.00B ~ (all equal) Filter/udp4_out-8 16.0B ± 0% 64.0B ± 0% +300.00% (p=0.008 n=5+5) Filter/icmp6-8 0.00B 0.00B ~ (all equal) Filter/tcp6_syn_in-8 0.00B 0.00B ~ (all equal) Filter/tcp6_syn_out-8 0.00B 0.00B ~ (all equal) Filter/udp6_in-8 0.00B 0.00B ~ (all equal) Filter/udp6_out-8 48.0B ± 0% 64.0B ± 0% +33.33% (p=0.008 n=5+5) name old allocs/op new allocs/op delta pkg:tailscale.com/net/packet goos:linux goarch:amd64 Decode/tcp4-8 0.00 0.00 ~ (all equal) Decode/tcp6-8 0.00 0.00 ~ (all equal) Decode/udp4-8 0.00 0.00 ~ (all equal) Decode/udp6-8 0.00 0.00 ~ (all equal) Decode/icmp4-8 0.00 0.00 ~ (all equal) Decode/icmp6-8 0.00 0.00 ~ (all equal) Decode/igmp-8 0.00 0.00 ~ (all equal) Decode/unknown-8 0.00 0.00 ~ (all equal) pkg:tailscale.com/wgengine/filter goos:linux goarch:amd64 Filter/icmp4-8 0.00 0.00 ~ (all equal) Filter/tcp4_syn_in-8 0.00 0.00 ~ (all equal) Filter/tcp4_syn_out-8 0.00 0.00 ~ (all equal) Filter/udp4_in-8 0.00 0.00 ~ (all equal) Filter/udp4_out-8 1.00 ± 0% 1.00 ± 0% ~ (all equal) Filter/icmp6-8 0.00 0.00 ~ (all equal) Filter/tcp6_syn_in-8 0.00 0.00 ~ (all equal) Filter/tcp6_syn_out-8 0.00 0.00 ~ (all equal) Filter/udp6_in-8 0.00 0.00 ~ (all equal) Filter/udp6_out-8 1.00 ± 0% 1.00 ± 0% ~ (all equal) Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Crawshaw	2b2a16d9a2	wgengine/router/dns: reduce windows registry key open timeout ... The windows key timeout is longer than the wgengine watchdog timeout, which means we never reach the timeout, instead the process exits. Reduce the timeout so if we do hit it, at least the process continues. Signed-off-by: David Crawshaw <crawshaw@tailscale.com>	4 years ago
David Crawshaw	b4f70d8232	wgengine/router/dns: use the correct interface GUID ... On Win10, there's a hardcoded GUID and this works. On Win7, this GUID changes and we need to ask the tun for its LUID and convert that from the GUID. This commit uses the computed GUID that is placed in InterfaceName. Diagnosed by Jason Donnenfeld. (Thanks!)	4 years ago
Brad Fitzpatrick	15c064f76f	wgengine/router/dns: remove unsafe endianness detection on Linux	4 years ago
Brad Fitzpatrick	f9659323df	wgengine/router/dns: fix typo in comment	4 years ago
Brad Fitzpatrick	053a1d1340	all: annotate log verbosity levels on most egregiously spammy log prints ... Fixes #924 Fixes #282 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
David Anderson	294ceb513c	ipn, wgengine/magicsock: fix `tailscale status` display. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	891110e64c	wgengine: expand lazy config to work with dual-stacked peers. ... Lazy wg configuration now triggers if a peer has only endpoint addresses (/32 for IPv4, /128 for IPv6). Subnet routers still trigger eager configuration to avoid the need for a CIDR match in the hot packet path. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	c8c493f3d9	wgengine/magicsock: make ReceiveIPv4 a little easier to follow. ... The previous code used a lot of whole-function variables and shared behavior that only triggered based on prior action from a single codepath. Instead of that, move the small amounts of "shared" code into each switch case. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago