560 Commits (2c8859c2e725af2de59203c0b2d39b96f135cb60)

Author	SHA1	Message	Date
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
Josh Bleecher Snyder	1df162b05b	wgengine/magicsock: adapt CreateEndpoint signature to match wireguard-go ... Part of a temporary change to make merging wireguard-go easier. See https://github.com/tailscale/wireguard-go/pull/45. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
Brad Fitzpatrick	81143b6d9a	ipn/ipnlocal: start of peerapi between nodes ... Also some necessary refactoring of the ipn/ipnstate too. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	c99f260e40	wgengine/magicsock: prefer IPv6 transport if roughly equivalent latency ... Fixes #1566 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	9643d8b34d	wgengine/magicsock: add an addrLatency type to combine an IPPort+time.Duration ... Updates #1566 (but no behavior changes as of this change) Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	0994a9f7c4	wgengine{,/magicsock}: fix, improve "tailscale ping" to default routes and subnets ... e.g. $ tailscale ping 1.1.1.1 exit node found but not enabled $ tailscale ping 10.2.200.2 node "tsbfvlan2" found, but not using its 10.2.200.0/24 route $ sudo tailscale up --accept-routes $ tailscale ping 10.2.200.2 pong from tsbfvlan2 (100.124.196.94) via 10.2.200.34:41641 in 1ms $ tailscale ping mon.ts.tailscale.com pong from monitoring (100.88.178.64) via DERP(sfo) in 83ms pong from monitoring (100.88.178.64) via DERP(sfo) in 21ms pong from monitoring (100.88.178.64) via [2604:a880:4:d1::37:d001]:41641 in 22ms This necessarily moves code up from magicsock to wgengine, so we can look at the actual wireguard config. Fixes #1564 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	7e0d12e7cc	wgengine/magicsock: don't update control if only endpoint order changes ... Updates #1559 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	32562a82a9	wgengine/magicsock: annotate a few more disco logs as verbose ... Fixes #1540 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	ba8c6d0775	health, controlclient, ipn, magicsock: tell health package state of things ... Not yet checking anything. Just plumbing states into the health package. Updates #1505 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	44ab0acbdb	net/portmapper, wgengine/monitor: cache gateway IP info until link changes ... Cuts down allocs & CPU in steady state (on regular STUN probes) when network is unchanging. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	c81814e4f8	derp{,/derphttp},magicsock: tell DERP server when ping acks can be expected ... Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	c576fea60e	wgengine/magicsock: delete unused WhoIs method that was moved elsewhere ... Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	ef7bac2895	tailcfg, net/portmapper, wgengine/magicsock: add NetInfo.HavePortMap ... Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	79d8288f0a	wgengine/magicsock, derp, derp/derphttp: respond to DERP server->client pings ... No server support yet, but we want Tailscale 1.6 clients to be able to respond to them when the server can do it. Updates #1310 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	387e83c8fe	wgengine/magicsock: fix Conn.Rebind race that let ErrClosed errors be read ... There was a logical race where Conn.Rebind could acquire the RebindingUDPConn mutex, close the connection, fail to rebind, release the mutex, and then because the mutex was no longer held, ReceiveIPv4 wouldn't retry reads that failed with net.ErrClosed, letting that error back to wireguard-go, which would then stop running that receive IP goroutine. Instead, keep the RebindingUDPConn mutex held for the entirety of the replacement in all cases. Updates tailscale/corp#1289 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	c445e3d327	wgengine/magicsock: fix typo in comment	4 years ago
Brad Fitzpatrick	a6d098c750	wgengine/magicsock: log when DERP connection succeeds ... Updates #1310	4 years ago
Brad Fitzpatrick	829eb8363a	net/interfaces: sort returned addresses from LocalAddresses ... Also change the type to netaddr.IP while here, because it made sorting easier. Updates tailscale/corp#1397 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	c3e5903b91	wgengine/magicsock: remove leftover portmapper debug logging ... It's already logged at the right time in logEndpointChange. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.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
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
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
Brad Fitzpatrick	7e201806b1	wgengine/magicsock: reconnect to DERP home after network comes back up ... Updates #1310	4 years ago
Brad Fitzpatrick	9b4e50cec0	wgengine/magicsock: fix typo in comment	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
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
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	dd10babaed	wgenginer/magicsock: remove Addrs methods ... They are now unused. 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
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
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
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
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
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	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	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	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
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	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	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
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
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
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	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
David Anderson	0ad109f63d	wgengine/magicsock: move legacy endpoint creation into legacy.go. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	f873da5b16	wgengine/magicsock: move more legacy endpoint handling. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	58fcd103c4	wgengine/magicsock: move legacy sending code to legacy.go. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	65ae66260f	wgengine/magicsock: unexport AddrSet. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	c9b9afd761	wgengine/magicsock: move most legacy nat traversal bits to another file. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	554a20becb	wgengine/magicsock: only log about lazy config when actually doing lazy config. ... Before, tailscaled would log every 10 seconds when the periodic noteRecvActivity call happens. This is noisy, but worse it's misleading, because the message suggests that the disco code is starting a lazy config run for a missing peer, whereas in fact it's just an internal piece of keepalive logic. With this change, we still log when going from 0->1 tunnel for the peer, but not every 10s thereafter. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
Brad Fitzpatrick	fa412c8760	wgengine/filter, wgengine/magicsock: use new IP.BitLen to simplify some code	4 years ago
David Anderson	9cee0bfa8c	wgengine/magicsock: sprinkle more docstrings. ... Magicsock is too damn big, but this might help me page it back in faster next time. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
Brad Fitzpatrick	713cbe84c1	wgengine/magicsock: use net.JoinHostPort when host might have colons (udp6) ... Only affected tests. (where it just generated log spam)	4 years ago
Brad Fitzpatrick	450cfedeba	wgengine/magicsock: quiet an IPv6 warning in tests ... In tests, we force binding to localhost to avoid OS firewall warning dialogs. But for IPv6, we were trying (and failing) to bind to 127.0.0.1. You'd think we'd just say "localhost", but that's apparently ill defined. See https://tools.ietf.org/html/draft-ietf-dnsop-let-localhost-be-localhost and golang/go#22826. (It's bitten me in the past, but I can't remember specific bugs.) So use "::1" explicitly for "udp6", which makes the test quieter.	4 years ago
Brad Fitzpatrick	fd2a30cd32	wgengine/magicsock: make test pass on Windows and without firewall dialog box ... Updates #50	4 years ago
Brad Fitzpatrick	ac866054c7	wgengine/magicsock: add a backoff on DERP reconnects ... Fixes #808	4 years ago
Brad Fitzpatrick	105a820622	wgengine/magicsock: skip an endpoint update at start-up ... At startup the client doesn't yet have the DERP map so can't do STUN queries against DERP servers, so it only knows it local interface addresses, not its STUN-mapped addresses. We were reporting the interface-local addresses to control, getting the DERP map, and then immediately reporting the full set of updates. That was an extra HTTP request to control, but worse: it was an extra broadcast from control out to all the peers in the network. Now, skip the initial update if there are no stun results and we don't have a DERP map. More work remains optimizing start-up requests/map updates, but this is a start. Updates tailscale/corp#557	4 years ago
Brad Fitzpatrick	2076a50862	wgengine/magicsock: finish a comment sentence that ended prematurely	4 years ago
Brad Fitzpatrick	3e4c46259d	wgengine/magicsock: don't do netchecks either when network is down ... A continuation of 6ee219a25d Updates #640	4 years ago
Brad Fitzpatrick	6ee219a25d	ipn, wgengine, magicsock, tsdns: be quieter and less aggressive when offline ... If no interfaces are up, calm down and stop spamming so much. It was noticed as especially bad on Windows, but probably was bad everywhere. I just have the best network conditions testing on a Windows VM. Updates #604	4 years ago
Christina Wen	48fbe93e72	wgengine/magicsock: clarify pre-disco 'tailscale ping' error message ... This change clarifies the error message when a user pings a peer that is using an outdated version of Tailscale.	4 years ago
Josh Bleecher Snyder	0c0239242c	wgengine/magicsock: make discoPingPurpose a stringer ... It was useful for debugging once, it'll probably be useful again. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
Josh Bleecher Snyder	57e642648f	wgengine/magicsock: fix typo in comment	4 years ago
Brad Fitzpatrick	756d6a72bd	wgengine: lazily create peer wireguard configs more explicitly ... Rather than consider bigs jumps in last-received-from activity as a signal to possibly reconfigure the set of wireguard peers to have configured, instead just track the set of peers that are currently excluded from the configuration. Easier to reason about. Also adds a bit more logging. This might fix an error we saw on a machine running a recent unstable build: 2020-08-26 17:54:11.528033751 +0000 UTC: 8.6M/92.6M magicsock: [unexpected] lazy endpoint not created for [UcppE], d:42a770f678357249 2020-08-26 17:54:13.691305296 +0000 UTC: 8.7M/92.6M magicsock: DERP packet received from idle peer [UcppE]; created=false 2020-08-26 17:54:13.691383687 +0000 UTC: 8.7M/92.6M magicsock: DERP packet from unknown key: [UcppE] If it does happen again, though, we'll have more logs.	4 years ago
halulu	f27a57911b	cmd/tailscale: add derp and endpoints status (#703) ... cmd/tailscale: add local node's information to status output (by default) RELNOTE=yes Updates #477 Signed-off-by: Halulu <lzjluzijie@gmail.com>	4 years ago
David Crawshaw	dd2c61a519	magicsock: call RequestStatus when DERP connects ... Second attempt. Signed-off-by: David Crawshaw <crawshaw@tailscale.com>	4 years ago
David Crawshaw	a67b174da1	Revert "magicsock: call RequestStatus when DERP connects" ... Seems to break linux CI builder. Cannot reproduce locally, so attempting a rollback. This reverts commit cd7bc02ab1. Signed-off-by: David Crawshaw <crawshaw@tailscale.com>	4 years ago
David Crawshaw	cd7bc02ab1	magicsock: call RequestStatus when DERP connects ... Without this, a freshly started ipn client will be stuck in the "Starting" state until something triggers a call to RequestStatus. Usually a UI does this, but until then we can sit in this state until poked by an external event, as is evidenced by our e2e tests locking up when DERP is attached. (This only recently became a problem when we enabled lazy handshaking everywhere, otherwise the wireugard tunnel creation would also trigger a RequestStatus.) Signed-off-by: David Crawshaw <crawshaw@tailscale.com>	4 years ago
Brad Fitzpatrick	f6dc47efe4	tailcfg, controlclient, magicsock: add control feature flag to enable DRPO ... Updates #150	4 years ago
Brad Fitzpatrick	85c3d17b3c	wgengine/magicsock: use disco ping src as a candidate endpoint ... Consider: Hard NAT (A) <---> Hard NAT w/ mapped port (B) If A sends a packet to B's mapped port, A can disco ping B directly, with low latency, without DERP. But B couldn't establish a path back to A and needed to use DERP, despite already logging about A's endpoint and adding a mapping to it for other purposes (the wireguard conn.Endpoint lookup also needed it). This adds the tracking to discoEndpoint too so it'll be used for finding a path back. Fixes tailscale/corp#556 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	0512fd89a1	wgengine/magicsock: simplify handlePingLocked ... It's no longer true that 'de may be nil'	4 years ago
Brad Fitzpatrick	84dc891843	cmd/tailscale/cli: add ping subcommand ... For example: $ tailscale ping -h USAGE ping <hostname-or-IP> FLAGS -c 10 max number of pings to send -stop-once-direct true stop once a direct path is established -verbose false verbose output $ tailscale ping mon.ts.tailscale.com pong from monitoring (100.88.178.64) via DERP(sfo) in 65ms pong from monitoring (100.88.178.64) via DERP(sfo) in 252ms pong from monitoring (100.88.178.64) via [2604:a880:2:d1::36:d001]:41641 in 33ms Fixes #661 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	9a346fd8b4	wgengine,magicsock: fix two lazy wireguard config issues ... 1) we weren't waking up a discoEndpoint that once existed and went idle for 5 minutes and then got a disco message again. 2) userspaceEngine.noteReceiveActivity had a buggy check; fixed and added a test	4 years ago
Brad Fitzpatrick	cff737786e	wgengine/magicsock: fix lazy config deadlock, document more lock ordering ... This removes the atomic bool that tried to track whether we needed to acquire the lock on a future recursive call back into magicsock. Unfortunately that hack doesn't work because we also had a lock ordering issue between magicsock and userspaceEngine (see issue). This documents that too. Fixes #644	4 years ago
Brad Fitzpatrick	2bd9ad4b40	wgengine: fix deadlock between engine and magicsock	4 years ago
Brad Fitzpatrick	7c38db0c97	wgengine/magicsock: don't deadlock on pre-disco Endpoints w/ lazy wireguard configs ... Fixes tailscale/tailscale#637	4 years ago
Brad Fitzpatrick	4987a7d46c	wgengine/magicsock: when hard NAT, add stun-ipv4:static-port as candidate ... If a node is behind a hard NAT and is using an explicit local port number, assume they might've mapped a port and add their public IPv4 address with the local tailscaled's port number as a candidate endpoint.	4 years ago
Brad Fitzpatrick	bfcb0aa0be	wgengine/magicsock: deflake tests, Close deadlock again ... Better fix than 37903a9056 Fixes tailscale/corp#533	4 years ago
Brad Fitzpatrick	cb970539a6	wgengine/magicsock: remove TODO comment that's no longer applicable	4 years ago
Brad Fitzpatrick	915f65ddae	wgengine/magicsock: stop disco activity on IPN stop ... Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	c180abd7cf	wgengine/magicsock: merge errClosed and errConnClosed	4 years ago
Brad Fitzpatrick	d55fdd4669	wgengine/magicsock: update, flesh out a TODO	4 years ago
Brad Fitzpatrick	58b721f374	wgengine/magicsock: deflake some tests with an ugly hack ... Starting with fe68841dc7, some e2e tests got flaky. Rather than debug them (they're gnarly), just revert to the old behavior as far as those tests are concerned. The tests were somehow using magicsock without a private key and expecting it to do ... something. My goal with fe68841dc7 was to stop log spam and unnecessary work I saw on the iOS app when when stopping the app. Instead, only stop doing that work on any transition from once-had-a-private-key to no-longer-have-a-private-key. That fixes what I wanted to fix while still making the mysterious e2e tests happy.	4 years ago
David Anderson	0249236cc0	ipn/ipnstate: record assigned Tailscale IPs. ... wgengine/magicsock: use ipnstate to find assigned Tailscale IPs. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	f582eeabd1	wgengine/magicsock: add a test for active path discovery. ... Uses natlab only, because the point of this active discovery test is going to be that it should get through a lot of obstacles. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
Brad Fitzpatrick	37903a9056	wgengine/magicsock: fix occasional deadlock on Conn.Close on c.derpStarted ... The deadlock was: * Conn.Close was called, which acquired c.mu * Then this goroutine scheduled: if firstDerp { startGate = c.derpStarted go func() { dc.Connect(ctx) close(c.derpStarted) }() } * The getRegion hook for that derphttp.Client then ran, which also tries to acquire c.mu. This change makes that hook first see if we're already in a closing state and then it can pretend that region doesn't exist.	4 years ago
Brad Fitzpatrick	fe68841dc7	wgengine/magicsock: log better with less spam on transition to stopped state ... Required a minor test update too, which now needs a private key to get far enough to test the thing being tested.	4 years ago
Brad Fitzpatrick	e298327ba8	wgengine/magicsock: remove overkill, slow reflect.DeepEqual of NetworkMap ... No need to allocate or compare all the fields we don't care about.	4 years ago
Brad Fitzpatrick	16a9cfe2f4	wgengine: configure wireguard peers lazily, as needed ... wireguard-go uses 3 goroutines per peer (with reasonably large stacks & buffers). Rather than tell wireguard-go about all our peers, only tell it about peers we're actively communicating with. That means we need hooks into magicsock's packet receiving path and tstun's packet sending path to lazily create a wireguard peer on demand from the network map. This frees up lots of memory for iOS (where we have almost nothing left for larger domains with many users). We should ideally do this in wireguard-go itself one day, but that'd be a pretty big change. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	5066b824a6	wgengine/magicsock: don't log about disco ping timeouts if we have a working address ... Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	c06d2a8513	wgengine/magicsock: fix typo in comment	4 years ago
Brad Fitzpatrick	bf195cd3d8	wgengine/magicsock: reduce log verbosity of discovery messages ... Don't log heartbeat pings & pongs. Track the reason for pings and then only log the ping/pong traffic if it was for initial path discovery.	4 years ago
Brad Fitzpatrick	10ac066013	all: fix vet warnings	4 years ago
Brad Fitzpatrick	d74c9aa95b	wgengine/magicsock: update comment, fix earlier commit ... 891898525c had a continue that meant the didCopy synchronization never ran. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	c976264bd1	wgengine/magicsock: gofmt	4 years ago
Dmytro Shynkevych	f3e2b65637	wgengine/magicsock: time.Sleep -> time.After ... Signed-off-by: Dmytro Shynkevych <dmytro@tailscale.com>	4 years ago
Dmytro Shynkevych	380ee76d00	wgengine/magicsock: make time.Sleep in runDerpReader respect cancellation. ... Before this patch, the 250ms sleep would not be interrupted by context cancellation, which would result in the goroutine sometimes lingering in tests (100ms grace period). Signed-off-by: Dmytro Shynkevych <dmytro@tailscale.com>	4 years ago
Dmytro Shynkevych	891898525c	wgengine/magicsock: make receive from didCopy respect cancellation. ... Very rarely, cancellation occurs between a successful send on derpRecvCh and a call to copyBuf on the receiving side. Without this patch, this situation results in <-copyBuf blocking indefinitely. Signed-off-by: Dmytro Shynkevych <dmytro@tailscale.com>	4 years ago
Brad Fitzpatrick	a2267aae99	wgengine: only launch pingers for peers predating the discovery protocol ... Peers advertising a discovery key know how to speak the discovery protocol and do their own heartbeats to get through NATs and keep NATs open. No need for the pinger except for with legacy peers.	4 years ago
Dmytro Shynkevych	2f15894a10	wgengine/magicsock: wait for derphttp client goroutine to exit ... Signed-off-by: Dmytro Shynkevych <dmytro@tailscale.com>	4 years ago
Brad Fitzpatrick	6c74065053	wgengine/magicsock, tstest/natlab: start hooking up natlab to magicsock ... Also adds ephemeral port support to natlab. Work in progress. Pairing with @danderson.	4 years ago
Brad Fitzpatrick	bd59bba8e6	wgengine/magicsock: stop discoEndpoint timers on Close ... And add some defensive early returns on c.closed.	4 years ago
Brad Fitzpatrick	de875a4d87	wgengine/magicsock: remove DisableSTUNForTesting	4 years ago
Brad Fitzpatrick	5c6d8e3053	netcheck, tailcfg, interfaces, magicsock: survey UPnP, NAT-PMP, PCP ... Don't do anything with UPnP, NAT-PMP, PCP yet, but see how common they are in the wild. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	6196b7e658	wgengine/magicsock: change API to not permit disco key changes ... Generate the disco key ourselves and give out the public half instead. Fixes #525	4 years ago
Brad Fitzpatrick	5132edacf7	wgengine/magicsock: fix data race from undocumented wireguard-go requirement ... Endpoints need to be Stringers apparently. Fixes tailscale/corp#422	4 years ago
Brad Fitzpatrick	630379a1d0	cmd/tailscale: add tailscale status region name, last write, consistently star ... There's a lot of confusion around what tailscale status shows, so make it better: show region names, last write time, and put stars around DERP too if active. Now stars are always present if activity, and always somewhere.	4 years ago
Brad Fitzpatrick	9a8700b02a	wgengine/magicsock: add discoEndpoint heartbeat ... Updates #483	4 years ago
Brad Fitzpatrick	9f930ef2bf	wgengine/magicsock: remove the discoEndpoint.timers map ... It ended up being more complicated than it was worth.	4 years ago
Brad Fitzpatrick	f5f3885b5b	wgengine/magicsock: bunch of misc discovery path cleanups ... * fix tailscale status for peers using discovery * as part of that, pull out disco address selection into reusable and testable discoEndpoint.addrForSendLocked * truncate ping/pong logged hex txids in half to eliminate noise * move a bunch of random time constants into named constants with docs * track a history of per-endpoint pong replies for future use & status display * add "send" and " got" prefix to discovery message logging immediately before the frame type so it's easier to read than searching for the "<-" or "->" arrows earlier in the line; but keep those as the more reasily machine readable part for later. Updates #483	4 years ago
Brad Fitzpatrick	6c70cf7222	wgengine/magicsock: stop ping timeout timer on pong receipt, misc log cleanup ... Updates #483	4 years ago
Brad Fitzpatrick	c52905abaa	wgengine/magicsock: log less on no-op disco route switches ... Also, renew trustBestAddrUntil even if latency isn't better.	4 years ago
Brad Fitzpatrick	0f0ed3dca0	wgengine/magicsock: clean up discovery logging ... Updates #483	4 years ago
Brad Fitzpatrick	056fbee4ef	wgengine/magicsock: add TS_DEBUG_OMIT_LOCAL_ADDRS knob to force STUN use only ... For debugging.	4 years ago
Brad Fitzpatrick	e03cc2ef57	wgengine/magicsock: populate discoOfAddr upon receiving ping frames ... Updates #483	4 years ago
Brad Fitzpatrick	275a20f817	wgengine/magicsock: keep discoOfAddr populated, use it for findEndpoint ... Update the mapping from ip:port to discokey, so when we retrieve a packet from the network, we can find the same conn.Endpoint that we gave to wireguard-go previously, without making it think we've roamed. (We did, but we're not using its roaming.) Updates #483	4 years ago
Brad Fitzpatrick	77e89c4a72	wgengine/magicsock: handle CallMeMaybe discovery mesages ... Roughly feature complete now. Testing and polish remains. Updates #483	4 years ago
Brad Fitzpatrick	710ee88e94	wgengine/magicsock: add timeout on discovery pings, clean up state ... Updates #483	4 years ago
Brad Fitzpatrick	77d3ef36f4	wgengine/magicsock: hook up discovery messages, upgrade to LAN works ... Ping messages now go out somewhat regularly, pong replies are sent, and pong replies are now partially handled enough to upgrade off DERP to LAN. CallMeMaybe packets are sent & received over DERP, but aren't yet handled. That's next (and regular maintenance timers), and then WAN should work. Updates #483	4 years ago
Brad Fitzpatrick	9b8ca219a1	wgengine/magicsock: remove allocs in UDP write, use new netaddr.PutUDPAddr ... The allocs were only introduced yesterday with a TODO. Now they're gone again.	4 years ago
Brad Fitzpatrick	7b3c0bb7f6	wgengine/magicsock: fix crash reading DERP packet ... Starting at yesterday's e96f22e560 (convering some UDPAddrs to IPPorts), Conn.ReceiveIPv4 could return a nil addr, which would make its way through wireguard-go and blow up later. The DERP read path wasn't initializing the addr result parameter any more, and wgRecvAddr wasn't checking it either. Fixes #515	4 years ago
Brad Fitzpatrick	47b4a19786	wgengine/magicsock: use netaddr.ParseIPPort instead of net.ResolveUDPAddr	4 years ago
Brad Fitzpatrick	f7124c7f06	wgengine/magicsock: start of discoEndpoint state tracking ... Updates #483	4 years ago
Brad Fitzpatrick	92252b0988	wgengine/magicsock: add a little LRU cache for netaddr.IPPort lookups ... And while plumbing, a bit of discovery work I'll need: the endpointOfAddr map to map from validated paths to the discoEndpoint. Not being populated yet. Updates #483	4 years ago
Brad Fitzpatrick	2d6e84e19e	net/netcheck, wgengine/magicsock: replace more UDPAddr with netaddr.IPPort	4 years ago
Brad Fitzpatrick	9070aacdee	wgengine/magicsock: minor comments & logging & TODO changes	4 years ago
Brad Fitzpatrick	e96f22e560	wgengine/magicsock: start handling disco message, use netaddr.IPPort more ... Updates #483	4 years ago
Brad Fitzpatrick	a83ca9e734	wgengine/magicsock: cache precomputed nacl/box shared keys ... Updates #483	4 years ago
Brad Fitzpatrick	a975e86bb8	wgengine/magicsock: add new endpoint type used for discovery-supporting peers ... This adds a new magicsock endpoint type only used when both sides support discovery (that is, are advertising a discovery key). Otherwise the old code is used. So far the new code only communicates over DERP as proof that the new code paths are wired up. None of the actually discovery messaging is implemented yet. Support for discovery (generating and advertising a key) are still behind an environment variable for now. Updates #483	4 years ago
Brad Fitzpatrick	103c06cc68	wgengine/magicsock: open discovery naclbox messages from known peers ... And track known peers. Doesn't yet do anything with the messages. (nor does it send any yet) Start of docs on the message format. More will come in subsequent changes. Updates #483	4 years ago
Brad Fitzpatrick	23e74a0f7a	wgengine, magicsock, tstun: don't regularly STUN when idle (mobile only for now) ... If there's been 5 minutes of inactivity, stop doing STUN lookups. That means NAT mappings will expire, but they can resume later when there's activity again. We'll do this for all platforms later. Updates tailscale/corp#320 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	fe50cd0c48	ipn, wgengine: plumb NetworkMap down to magicsock ... Now we can have magicsock make decisions based on tailcfg.Debug settings sent by the server. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	53fb25fc2f	all: generate discovery key, plumb it around ... Not actually used yet. Updates #483	4 years ago
Brad Fitzpatrick	abd79ea368	derp: reduce DERP memory use; don't require callers to pass in memory to use ... The magicsock derpReader was holding onto 65KB for each DERP connection forever, just in case. Make the derp{,http}.Client be in charge of memory instead. It can reuse its bufio.Reader buffer space.	5 years ago
Brad Fitzpatrick	280e8884dd	wgengine/magicsock: limit redundant log spam on packets from low-pri addresses ... Fixes #407 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	5 years ago
Brad Fitzpatrick	9e5d79e2f1	wgengine/magicsock: drop a bytes.Buffer sync.Pool, use logger.ArgWriter instead	5 years ago
Brad Fitzpatrick	db2a216561	wgengine/magicsock: don't log on UDP send errors if address family known missing ... Fixes #376	5 years ago