tailscale

Commit Graph

Author	SHA1	Message	Date
Josh Bleecher Snyder	758c37b83d	net/netns: thread logf into control functions So that darwin can log there without panicking during tests. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Brad Fitzpatrick	8ec44d0d5f	wgengine/magicsock: remove some log spam Fixes tailscale/corp#3070 Change-Id: Ie50031800ec8669e0596ad6d59d1e329a5c88516 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Josh Bleecher Snyder	b3d6704aa3	wgengine/magicsock: fix data race on endpoint.discoKey endpoint.discoKey is protected by endpoint.mu. endpoint.sendDiscoMessage was reading it without holding the lock. This showed up in a CI failure and is readily reproducible locally. The fix is in two parts. First, for Conn.enqueueCallMeMaybe, eliminate the one-line helper method endpoint.sendDiscoMessage; call Conn.sendDiscoMessage directly. This makes it more natural to read endpoint.discoKey in a context in which endpoint.mu is already held. Second, for endpoint.sendDiscoPing, explicitly pass the disco key as an argument. Again, this makes it easier to read endpoint.discoKey in a context in which endpoint.mu is already held. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Josh Bleecher Snyder	773af7292b	wgengine/magicsock: simplify peerMap.upsertEndpoint We can do the "maybe delete" check unilaterally: In the case of an insert, both oldDiscoKey and ep.discoKey will be the zero value. And since we don't use pi again, we can skip giving it a name, which makes scoping clearer. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Josh Bleecher Snyder	9da22dac3d	wgengine/magicsock: fix bug in peerMap.upsertEndpoint Found by inspection by David Crawshaw while investigating tailscale/corp#3016. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Josh Bleecher Snyder	16870cb754	wgengine/magicsock: fix typo in comment Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Brad Fitzpatrick	24ea365d48	netcheck, controlclient, magicsock: add more metrics Updates #3307 Change-Id: Ibb33425764a75bde49230632f1b472f923551126 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
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
David Anderson	0532eb30db	all: replace tailcfg.DiscoKey with key.DiscoPublic. Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Anderson	7e6a1ef4f1	tailcfg: use key.NodePublic in wire protocol types. Updates #3206. Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Anderson	72ace0acba	wgengine/magicsock: use key.NodePublic instead of tailcfg.NodeKey. Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Anderson	84c3a09a8d	types/key: export constants for key size, not a method. Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Anderson	6422789ea0	disco: use key.NodePublic instead of tailcfg.NodeKey. Updates #3206 Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Anderson	418adae379	various: use NodePublic.AsNodeKey() instead of tailcfg.NodeKeyFromNodePublic() Updates #3206 Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Anderson	ef241f782e	wgengine/magicsock: remove uses of tailcfg.DiscoKey. Updates #3206 Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Anderson	55b6753c11	wgengine/magicsock: remove use of key.{Public,Private}. Updates #3206 Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Anderson	c1d009b9e9	ipn/ipnstate: use key.NodePublic instead of the generic key.Public. Updates #3206. Signed-off-by: David Anderson <danderson@tailscale.com>	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	c9bf773312	wgengine/magicsock: replace use of wgkey with new node key type. Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
Brad Fitzpatrick	b0b0a80318	net/netcheck: implement netcheck for js/wasm clients And the derper change to add a CORS endpoint for latency measurement. And a little magicsock change to cut down some log spam on js/wasm. Updates #3157 Change-Id: I5fd9e6f5098c815116ddc8ac90cbcd0602098a48 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	ed3fb197ad	wgengine/magicsock: fix/disable a few misc things to get js/wasm working Updates #3157 Change-Id: Ie9e3a772bb9878584080bb257b32150492e26eaf Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	e25afc6656	wgengine/magicsock: don't try to determine endpoints on js/wasm Avoid netcheck, LocalAddr, etc. Updates #3157 Change-Id: Ibc875c787c0e101b8076e64833f4fcc809372815 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	6cb2705833	wgengine/magicsock: don't run UDP listeners on js/wasm Be DERP-only for now. (WebRTC can come later :)) Updates #3157 Change-Id: I56ebb3d914e37e8f4ab651306fd705b817ca381c Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	c30fa5903d	wgengine/magicsock: remove peerMap.byDiscoKey map No longer used. Updates #3088 Change-Id: I0ced3f87baa4053d3838d3c4a828ed0293923825 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
David Crawshaw	3552d86525	wgengine/magicsock: turn down timeouts in tests Before: --- PASS: TestActiveDiscovery (11.78s) --- PASS: TestActiveDiscovery/facing_easy_firewalls (5.89s) --- PASS: TestActiveDiscovery/facing_nats (5.89s) --- PASS: TestActiveDiscovery/simple_internet (0.89s) After: --- PASS: TestActiveDiscovery (1.98s) --- PASS: TestActiveDiscovery/facing_easy_firewalls (0.99s) --- PASS: TestActiveDiscovery/facing_nats (0.99s) --- PASS: TestActiveDiscovery/simple_internet (0.89s) Signed-off-by: David Crawshaw <crawshaw@tailscale.com>	3 years ago
David Anderson	b956139b0c	wgengine/magicsock: track IP<>node mappings without relying on discokeys. Updates #3088. Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
Brad Fitzpatrick	7a243ae5b1	wgengine/magicsock: finish TODO to speed up peerMap.forEachEndpointWithDiscoKey Now that peerMap tracks the set of nodes for a DiscoKey. Updates #3088 Change-Id: I927bf2bdfd2b8126475f6b6acc44bc799fcb489f Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	11fdb14c53	wgengine/magicsock: don't check always-non-nil endpoint for nil-ness Continuation of `2aa5df7ac1`, remove nil check because it can never be nil. (It previously was able to be nil.) Change-Id: I59cd9ad611dbdcbfba680ed9b22e841b00c9d5e6 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
David Anderson	e7eb46bced	wgengine/magicsock: add an explicit else branch to peerMap update. Clarifies that the replace+delete of peerinfo data is only when peerInfo already exists. Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Anderson	2aa5df7ac1	wgengine/magicsock: document and enforce that peerInfo.ep is non-nil. Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Anderson	521b44e653	wgengine/magicsock: move discoKey fields to the mutex-protected section. Fixes #3106 Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
Brad Fitzpatrick	a6d02dc122	wgengine/magicsock: track which NodeKey each DiscoKey was last for This adds new fields (currently unused) to discoInfo to track what the last verified (unambiguous) NodeKey a DiscoKey last mapped to, and when. Then on CallMeMaybe, Pong and on most Pings, we update the mapping from DiscoKey to the current NodeKey for that DiscoKey. Updates #3088 Change-Id: Idc4261972084dec71cf8ec7f9861fb9178eb0a4d Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	c759fcc7d3	wgengine/magicsock: fix data race with sync.Pool in error+logging path Fixes #3122 Change-Id: Ib52e84f9bd5813d6cf2e80ce5b2296912a48e064 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	75a7779b42	disco, wgengine/magicsock: send self node key in disco pings This lets clients quickly (sub-millisecond within a local LAN) map from an ambiguous disco key to a node key without waiting for a CallMeMaybe (over relatively high latency DERP). Updates #3088 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Denton Gentry	def650b3e8	wgengine/magicsock: don't Rebind after STUN error if closed. https://github.com/tailscale/tailscale/pull/3014 added a rebind on STUN failure, which means there can now be a tailscale.com/wgengine/magicsock.(*RebindingUDPConn).ReadFromNetaddr in progress at the end of the test waiting for a STUN response which will never arrive. This causes a test flake due to the resource leak in those cases where the Conn decided to rebind. For whatever reason, it mostly flakes with Windows. If the Conn is closed, don't Rebind after a send error. Signed-off-by: Denton Gentry <dgentry@tailscale.com>	3 years ago
Brad Fitzpatrick	f55c2bccf5	wgengine/magicsock: don't call setAddrToDiscoLocked on DERP ping Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	569f70abfd	wgengine/magicsock: finish some renamings of discoEndpoint to endpoint Renames only; continuation of earlier `8049063d35` These kept confusing me while working on #3088 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	695df497ba	wgengine/magicsock: delete peerMap.endpointForDiscoKey, remove remaining caller The one remaining caller of peerMap.endpointForDiscoKey was making the improper assumption that there's exactly 1 node with a given DiscoKey in the network. That was the cause of #3088. Now that all the other callers have been updated to not use endpointForDiscoKey, there's no need to try to keep maintaining that prone-to-misuse index. Updates #3088 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	04fd94acd6	wgengine/magicsock: remove endpointForDiscoKey call from handleDiscoMessage A DiscoKey maps 1:n to endpoints. When we get a disco pong, we don't necessarily know which endpoint sent it to us. Ask them all. There will only usually be 1 (and in rare circumstances 2). So it's easier to ask all two rather than building new maps from the random ping TxID to its endpoint. Updates #3088 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	151b4415ca	wgengine/magicsock: remove endpoint parameter from handlePingLocked We can reply to a ping without knowing which exact node it's from. As long as it's in our netmap, it's safe to reply. If there's more than one node with that discokey, it doesn't matter who we're relpying to. Updates #3088 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	d86081f353	wgengine/magicsock: add new discoInfo type for DiscoKey state, move some fields As more prep for removing the false assumption that you're able to map from DiscoKey to a single peer, move the lastPingFrom and lastPingTime fields from the endpoint type to a new discoInfo type, effectively upgrading the old sharedDiscoKey map (which only held a *[32]byte nacl precomputed key as its value) to discoInfo which then includes that naclbox key. Then start plumbing it into handlePing in prep for removing the need for handlePing to take an endpoint parameter. Updates #3088 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	e5779f019e	wgengine/magicsock: move temporary endpoint lookup later, add TODO to remove Updates #3088 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	36a07089ee	wgengine/magicsock: remove redundant/wrong sharedDiscoKey delete The pass just after in this method handles cleaning up sharedDiscoKey. No need to do it wrong (assuming DiscoKey => 1 node) earlier. Updates #3088 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	3e80806804	wgengine/magicsock: pass src NodeKey to handleDiscoMessage for DERP disco msgs And then use it to avoid another lookup-by-DiscoKey. Updates #3088	3 years ago
Brad Fitzpatrick	82fa15fa3b	wgengine/magicsock: start removing endpointForDiscoKey It's not valid to assume that a discokey is globally unique. This removes the first two of the four callers. Updates #3088 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Avery Pennarun	0d4a0bf60e	magicsock: if STUN failed to send before, rebind before STUNning again. On iOS (and possibly other platforms), sometimes our UDP socket would get stuck in a state where it was bound to an invalid interface (or no interface) after a network reconfiguration. We can detect this by actually checking the error codes from sending our STUN packets. If we completely fail to send any STUN packets, we know something is very broken. So on the next STUN attempt, let's rebind the UDP socket to try to correct any problems. This fixes a problem where iOS would sometimes get stuck using DERP instead of direct connections until the backend was restarted. Fixes #2994 Signed-off-by: Avery Pennarun <apenwarr@tailscale.com>	3 years ago
David Anderson	830f641c6b	wgengine/magicsock: update discokeys on netmap change. Fixes #3008. Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
Brad Fitzpatrick	2238814b99	wgengine/magicsock: fix crash introduced in recent cleanups Fixes #2801 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	5bacbf3744	wgengine/magicsock, health, ipn/ipnstate: track DERP-advertised health And add health check errors to ipnstate.Status (tailscale status --json). Updates #2746 Updates #2775 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
David Anderson	bb10443edf	wgengine/wgcfg: use just the hexlified node key as the WireGuard endpoint. The node key is all magicsock needs to find the endpoint that WireGuard needs. Updates #2752 Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Anderson	dfd978f0f2	wgengine/magicsock: use NodeKey, not DiscoKey, as the trigger for lazy reconfig. Updates #2752 Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Anderson	4c27e2fa22	wgengine/magicsock: remove Start method from Conn. Over time, other magicsock refactors have made Start effectively a no-op, except that some other functions choose to panic if called before Start. Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Anderson	1a899344bd	wgengine/magicsock: don't store tailcfg.Nodes alongside endpoints. Updates #2752 Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Anderson	b2181608b5	wgengine/magicsock: eagerly create endpoints in SetNetworkMap. Updates #2752 Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Anderson	44d71d1e42	wgengine/magicsock: fix race in test shutdown, again. We were returning an error almost, but not quite like errConnClosed in a single codepath, which could still trip the panic on reconfig in the test logic. Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Anderson	8bacfe6a37	wgengine/magicsock: remove unused sendLogLimit limiter. Magicsock these days gets its logs limited by the global log limiter. Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Anderson	e151b74f93	wgengine/magicsock: remove opts.SimulatedNetwork. It only existed to override one test-only behavior with a different test-only behavior, in both cases working around an annoying feature of our CI environments. Instead, handle that weirdness entirely in the test code, with a tweaked TestOnlyPacketListener that gets injected. Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Anderson	58c1f7d51a	wgengine/magicsock: rename opts.PacketListener to TestOnlyPacketListener. The docstring said it was meant for use in tests, but it's specifically a special codepath that is _only_ used in tests, so make the claim stronger. Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Anderson	8049063d35	wgengine/magicsock: rename discoEndpoint to just endpoint. Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Anderson	f2d949e2db	wgengine/magicsock: fold findEndpoint into its only remaining caller. Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Anderson	fe2f89deab	wgengine/magicsock: fix rare shutdown race in test. Signed-off-by: David Anderson <danderson@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
slowy07	ac0353e982	fix: typo spelling grammar Signed-off-by: slowy07 <slowy.arfy@gmail.com>	3 years ago
Brad Fitzpatrick	37053801bb	wgengine/magicsock: restore a bit of logging on node becoming active Fixes #2695 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	39610aeb09	wgengine/magicsock: move debug knobs to their own file, compile out on iOS No need for these knobs on iOS where you can set the environment variables anyway. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	f3c96df162	ipn/ipnstate: move tailscale status "active" determination to tailscaled Fixes #2579 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	b622c60ed0	derp,wgengine/magicsock: don't assume stringer is in $PATH for go:generate Signed-off-by: Brad Fitzpatrick <bradfitz@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	4dbbd0aa4a	cmd/addlicense: add command to add licenseheaders to generated code And use it to make our stringer invocations match the existing code. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Josh Bleecher Snyder	c179580599	wgengine/magicsock: add debug envvar to force all traffic over DERP This would have been useful during debugging DERP issues recently. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Brad Fitzpatrick	92077ae78c	wgengine/magicsock: make portmapping async Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
David Crawshaw	5f8ffbe166	magicsock: add SetPreferredPort method Signed-off-by: David Crawshaw <crawshaw@tailscale.com>	3 years ago
Josh Bleecher Snyder	ddf6c8c729	wgengine/magicsock: delete dead code Co-authored-by: Adrian Dewhurst <adrian@tailscale.com> Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
Josh Bleecher Snyder	1ece91cede	go.mod: upgrade wireguard-windows, de-fork wireguard-go Pull in the latest version of wireguard-windows. Switch to upstream wireguard-go. This requires reverting all of our import paths. Unfortunately, this has to happen at the same time. The wireguard-go change is very low risk, as that commit matches our fork almost exactly. (The only changes are import paths, CI files, and a go.mod entry.) So if there are issues as a result of this commit, the first place to look is wireguard-windows changes. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
Josh Bleecher Snyder	25df067dd0	all: adapt to opaque netaddr types This commit is a mishmash of automated edits using gofmt: gofmt -r 'netaddr.IPPort{IP: a, Port: b} -> netaddr.IPPortFrom(a, b)' -w . gofmt -r 'netaddr.IPPrefix{IP: a, Port: b} -> netaddr.IPPrefixFrom(a, b)' -w . gofmt -r 'a.IP.Is4 -> a.IP().Is4' -w . gofmt -r 'a.IP.As16 -> a.IP().As16' -w . gofmt -r 'a.IP.Is6 -> a.IP().Is6' -w . gofmt -r 'a.IP.As4 -> a.IP().As4' -w . gofmt -r 'a.IP.String -> a.IP().String' -w . And regexps: \w(.)\.Port = (.) -> $1 = $1.WithPort($2) \w(.)\.IP = (.) -> $1 = $1.WithIP($2) And lots of manual fixups. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
Josh Bleecher Snyder	ebcd7ab890	wgengine: remove wireguard-go DeviceOptions We no longer need them. This also removes the 32 bytes of prefix junk before endpoints. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
Josh Bleecher Snyder	aacb2107ae	all: add extra information to serialized endpoints magicsock.Conn.ParseEndpoint requires a peer's public key, disco key, and legacy ip/ports in order to do its job. We currently accomplish that by: * adding the public key in our wireguard-go fork * encoding the disco key as magic hostname * using a bespoke comma-separated encoding It's a bit messy. Instead, switch to something simpler: use a json-encoded struct containing exactly the information we need, in the form we use it. Our wireguard-go fork still adds the public key to the address when it passes it to ParseEndpoint, but now the code compensating for that is just a couple of simple, well-commented lines. Once this commit is in, we can remove that part of the fork and remove the compensating code. Signed-off-by: Josh Bleecher Snyder <josharian@gmail.com>	4 years ago
Josh Bleecher Snyder	ddd85b9d91	wgengine/magicsock: rename discoEndpoint.wgEndpointHostPort to wgEndpoint Fields rename only. Part of the general effort to make our code agnostic about endpoint formatting. It's just a name, but it will soon be a misleading one; be more generic. Do this as a separate commit because it generates a lot of whitespace changes. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
Josh Bleecher Snyder	bc68e22c5b	all: s/CreateEndpoint/ParseEndpoint/ in docs Upstream wireguard-go renamed the interface method from CreateEndpoint to ParseEndpoint. I missed some comments. Fix them. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
Josh Bleecher Snyder	9d542e08e2	wgengine/magicsock: always run ReceiveIPv6 One of the consequences of the bind refactoring in `6f23087175` is that attempting to bind an IPv6 socket will always result in c.pconn6.pconn being non-nil. If the bind fails, it'll be set to a placeholder packet conn that blocks forever. As a result, we can always run ReceiveIPv6 and health check it. This removes IPv4/IPv6 asymmetry and also will allow health checks to detect any IPv6 receive func failures. Signed-off-by: Josh Bleecher Snyder <josharian@gmail.com>	4 years ago
Josh Bleecher Snyder	fe50ded95c	health: track whether we have a functional udp4 bind Suggested-by: Brad Fitzpatrick <bradfitz@tailscale.com> Signed-off-by: Josh Bleecher Snyder <josharian@gmail.com>	4 years ago
Josh Bleecher Snyder	7dc7078d96	wgengine/magicsock: use netaddr.IP in listenPacket It must be an IP address; enforce that at the type level. Suggested-by: Brad Fitzpatrick <bradfitz@tailscale.com> Signed-off-by: Josh Bleecher Snyder <josharian@gmail.com>	4 years ago
Josh Bleecher Snyder	3c543c103a	wgengine/magicsock: unify initial bind and rebind We had two separate code paths for the initial UDP listener bind and any subsequent rebinds. IPv6 got left out of the rebind code. Rather than duplicate it there, unify the two code paths. Then improve the resulting code: * Rebind had nested listen attempts to try the user-specified port first, and then fall back to :0 if that failed. Convert that into a loop. * Initial bind tried only the user-specified port. Rebind tried the user-specified port and 0. But there are actually three ports of interest: The one the user specified, the most recent port in use, and 0. We now try all three in order, as appropriate. * In the extremely rare case in which binding to port 0 fails, use a dummy net.PacketConn whose reads block until close. This will keep the wireguard-go receive func goroutine alive. As a pleasant side-effect of this, if we decide that we need to resuscitate #1796, it will now be much easier. Fixes #1799 Co-authored-by: David Anderson <danderson@tailscale.com> Signed-off-by: Josh Bleecher Snyder <josharian@gmail.com>	4 years ago
Josh Bleecher Snyder	8fb66e20a4	wgengine/magicsock: remove DefaultPort const Assume it'll stay at 0 forever, so hard-code it and delete code conditional on it being non-0. Signed-off-by: Josh Bleecher Snyder <josharian@gmail.com>	4 years ago
Josh Bleecher Snyder	a8f61969b9	wgengine/magicsock: remove context arg from listenPacket It was set to context.Background by all callers, for the same reasons. Set it locally instead, to simplify call sites. Signed-off-by: Josh Bleecher Snyder <josharian@gmail.com>	4 years ago
Josh Bleecher Snyder	744de615f1	health, wgenegine: fix receive func health checks for the fourth time The old implementation knew too much about how wireguard-go worked. As a result, it missed genuine problems that occurred due to unrelated bugs. This fourth attempt to fix the health checks takes a black box approach. A receive func is healthy if one (or both) of these conditions holds: * It is currently running and blocked. * It has been executed recently. The second condition is required because receive functions are not continuously executing. wireguard-go calls them and then processes their results before calling them again. There is a theoretical false positive if wireguard-go go takes longer than one minute to process the results of a receive func execution. If that happens, we have other problems. Updates #1790 Signed-off-by: Josh Bleecher Snyder <josharian@gmail.com>	4 years ago
Josh Bleecher Snyder	0d4c8cb2e1	health: delete ReceiveFunc health checks They were not doing their job. They need yet another conceptual re-think. Start by clearing the decks. Signed-off-by: Josh Bleecher Snyder <josharian@gmail.com>	4 years ago
Josh Bleecher Snyder	8d7f7fc7ce	health, wgenegine: fix receive func health checks yet again The existing implementation was completely, embarrassingly conceptually broken. We aren't able to see whether wireguard-go's receive function goroutines are running or not. All we can do is model that based on what we have done. This commit fixes that model. Fixes #1781 Signed-off-by: Josh Bleecher Snyder <josharian@gmail.com>	4 years ago
Josh Bleecher Snyder	5835a3f553	health, wgengine/magicsock: avoid receive function false positives Avery reported a sub-ms health transition from "receiveIPv4 not running" to "ok". To avoid these transient false-positives, be more precise about the expected lifetime of receive funcs. The problematic case is one in which they were started but exited prior to a call to connBind.Close. Explicitly represent started vs running state, taking care with the order of updates. Signed-off-by: Josh Bleecher Snyder <josharian@gmail.com>	4 years ago
Josh Bleecher Snyder	f845aae761	health: track whether magicsock receive functions are running Signed-off-by: Josh Bleecher Snyder <josharian@gmail.com>	4 years ago
Josh Bleecher Snyder	48e30bb8de	wgengine/magicsock: remove named return Doesn't add anything. Signed-off-by: Josh Bleecher Snyder <josharian@gmail.com>	4 years ago
Josh Bleecher Snyder	a2a2c0ce1c	wgengine/magicsock: fix two comments Signed-off-by: Josh Bleecher Snyder <josharian@gmail.com>	4 years ago
Josh Bleecher Snyder	b1e624ef04	wgengine/magicsock: remove unnecessary type assertions Signed-off-by: Josh Bleecher Snyder <josharian@gmail.com>	4 years ago
Josh Bleecher Snyder	98714e784b	wgengine/magicsock: improve Rebind logging We were accidentally logging oldPort -> oldPort. Log oldPort as well as c.port; if we failed to get the preferred port in a previous rebind, oldPort might differ from c.port. Signed-off-by: Josh Bleecher Snyder <josharian@gmail.com>	4 years ago
Josh Bleecher Snyder	15ceacc4c5	wgengine/magicsock: accept a host and port instead of an addr in listenPacket This simplifies call sites and prevents accidental failure to use net.JoinHostPort. Signed-off-by: Josh Bleecher Snyder <josharian@gmail.com>	4 years ago
Brad Fitzpatrick	b993d9802a	ipn/ipnlocal, etc: require file sharing capability to send/recv files tailscale/corp#1582 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	762180595d	ipn/ipnstate: add PeerStatus.TailscaleIPs slice, deprecate TailAddr Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	34d2f5a3d9	tailcfg: add Endpoint, EndpointType, MapRequest.EndpointType Track endpoints internally with a new tailcfg.Endpoint type that includes a typed netaddr.IPPort (instead of just a string) and includes a type for how that endpoint was discovered (STUN, local, etc). Use []tailcfg.Endpoint instead of []string internally. At the last second, send it to the control server as the existing []string for endpoints, but also include a new parallel MapRequest.EndpointType []tailcfg.EndpointType, so the control server can start filtering out less-important endpoint changes from new-enough clients. Notably, STUN-discovered endpoints can be filtered out from 1.6+ clients, as they can discover them amongst each other via CallMeMaybe disco exchanges started over DERP. And STUN endpoints change a lot, causing a lot of MapResposne updates. But portmapped endpoints are worth keeping for now, as they they work right away without requiring the firewall traversal extra RTT dance. End result will be less control->client bandwidth. (despite negligible increase in client->control bandwidth) Updates tailscale/corp#1543 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Josh Bleecher Snyder	ba72126b72	wgengine/magicsock: remove RebindingUDPConn.FakeClosed It existed to work around the frequent opening and closing of the conn.Bind done by wireguard-go. The preceding commit removed that behavior, so we can simply close the connections when we are done with them. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
Josh Bleecher Snyder	b3ceca1dd7	wgengine/...: split into multiple receive functions Upstream wireguard-go has changed its receive model. NewDevice now accepts a conn.Bind interface. The conn.Bind is stateless; magicsock.Conns are stateful. To work around this, we add a connBind type that supports cheap teardown and bring-up, backed by a Conn. The new conn.Bind allows us to specify a set of receive functions, rather than having to shoehorn everything into ReceiveIPv4 and ReceiveIPv6. This lets us plumbing DERP messages directly into wireguard-go, instead of having to mux them via ReceiveIPv4. One consequence of the new conn.Bind layer is that closing the wireguard-go device is now indistinguishable from the routine bring-up and tear-down normally experienced by a conn.Bind. We thus have to explicitly close the magicsock.Conn when the close the wireguard-go device. One downside of this change is that we are reliant on wireguard-go to call receiveDERP to process DERP messages. This is fine for now, but is perhaps something we should fix in the future. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago

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417 Commits (f8497daa68ef312f87c6583c41c9975500d5b88e)