tailscale

Commit Graph

Author	SHA1	Message	Date
Josh Bleecher Snyder	69cdc30c6d	wgengine/wgcfg: remove Config.ListenPort We don't use the port that wireguard-go passes to us (via magicsock.connBind.Open). We ignore it entirely and use the port we selected. When we tell wireguard-go that we're changing the listen_port, it calls connBind.Close and then connBind.Open. And in the meantime, it stops calling the receive functions, which means that we stop receiving and processing UDP and DERP packets. And that is Very Bad. That was never a problem prior to `b3ceca1dd7`, because we passed the SkipBindUpdate flag to our wireguard-go fork, which told wireguard-go not to re-bind on listen_port changes. That commit eliminated the SkipBindUpdate flag. We could write a bunch of code to work around the gap. We could add background readers that process UDP and DERP packets when wireguard-go isn't. But it's simpler to never create the conditions in which wireguard-go rebinds. The other scenario in which wireguard-go re-binds is device.Down. Conveniently, we never call device.Down. We go from device.Up to device.Close, and the latter only when we're shutting down a magicsock.Conn completely. Rubber-ducked-by: Avery Pennarun <apenwarr@tailscale.com> Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
David Anderson	27a1a2976a	wgengine/router: add a CallbackRouter shim. The shim implements both network and DNS configurators, and feeds both into a single callback that receives both configs. Signed-off-by: David Anderson <danderson@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
David Anderson	6ad44f9fdf	wgengine: take in dns.Config, split out to resolver.Config and dns.OSConfig. Stepping stone towards having the DNS package handle the config splitting. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	8af9d770cf	net/dns: rename Config to OSConfig. Making way for a new higher level config struct. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	fcfc0d3a08	net/dns: remove ManagerConfig, pass relevant args directly. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	f77ba75d6c	wgengine/router: move DNS cleanup into the DNS package. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	15875ccc63	wgengine/router: don't store unused tunname on windows.	4 years ago
Josh Bleecher Snyder	34d4943357	all: gofmt -s The code is not obviously better or worse, but this makes the little warning triangle in my editor go away, and the distraction removal is worth it. 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	e64383a80e	wgengine/router: document some fields a bit more Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Denton Gentry	35ab4020c7	wgengine/monitor: Linux fall back to polling Google Cloud Run does not implement NETLINK_ROUTE RTMGRP. If initialization of the netlink socket or group membership fails, fall back to a polling implementation. Signed-off-by: Denton Gentry <dgentry@tailscale.com>	4 years ago
David Anderson	90f82b6946	net/dns/resolver: add live reconfig, plumb through to ipnlocal. The resolver still only supports a single upstream config, and ipn/wgengine still have to split up the DNS config, but this moves closer to unifying the DNS configs. As a handy side-effect of the refactor, IPv6 MagicDNS records exist now. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	f185d62dc8	net/dns/resolver: unexport Packet, only use it internally. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	5fb9e00ecf	net/dns/resolver: remove Start method, fully spin up in New instead. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	075fb93e69	net/dns/resolver: remove the Config struct. In preparation for reintroducing a runtime reconfig Config struct. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	bc81dd4690	net/dns/resolver: rename ResolverConfig to just Config. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	d99f5b1596	net/dns/resolver: factor the resolver out into a sub-package. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
Naman Sood	31c7745631	wgengine/netstack: stop re-adding IPs registered by active TCP connections (#1629 ) Signed-off-by: Naman Sood <mail@nsood.in>	4 years ago
Brad Fitzpatrick	7f03c0f8fe	wgengine/wgcfg/nmcfg: reduce some logging when a /0 route skipped Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Josh Bleecher Snyder	7b907615d5	wgengine/wgcfg/nmcfg: remove dead code The call to appendEndpoint updates cpeer.Endpoints. Then it is overwritten in the next line. The only errors from appendEndpoint occur when the host/port pair is malformed, but that cannot happen. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
Josh Bleecher Snyder	36a85e1760	wgengine/magicsock: don't call t.Fatal in magicStack.IP It can end up executing an a new goroutine, at which point instead of immediately stopping test execution, it hangs. Since this is unexpected anyway, panic instead. As a bonus, it makes call sites nicer and removes a kludge comment. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
Brad Fitzpatrick	4c83bbf850	wgengine: add IsNetstack func and test So we have a documented & tested way to check whether we're in netstack mode. To be used by future commits. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	91bc723817	wgengine: add temp workaround for netstack WhoIs registration race Updates #1616 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	41e4e02e57	net/{packet,tstun}: send peerapi port in TSMP pongs For discovery when an explicit hostname/IP is known. We'll still also send it via control for finding peers by a list. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Naman Sood	662fbd4a09	wgengine/netstack: Allow userspace networking mode to expose subnets (#1588 ) wgengine/netstack: Allow userspace networking mode to expose subnets Updates #504 Updates #707 Signed-off-by: Naman Sood <mail@nsood.in>	4 years ago
Brad Fitzpatrick	a4c679e646	wgengine/monitor: on wall time jump, synthesize network change event ... to force rebinds of TCP connections Fixes #1555 Updates tailscale/felicity#4 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
David Anderson	07bf4eb685	wgengine: rename Fake to RespondToPing. "Fake" doesn't mean a lot any more, given that many components of the engine can be faked out, including in valid production configurations like userspace-networking. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	0fb738760f	wgengine: make Tun optional again, default to fake. This makes setup more explicit in prod codepaths, without requiring a bunch of arguments or helpers for tests and userspace mode. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
Brad Fitzpatrick	e18c3a7d84	wgengine: optimize isLocalAddr a bit On macOS/iOS, this removes a map lookup per outgoing packet. Noticed it while reading code, not from profiles, but can't hurt. BenchmarkGenLocalAddrFunc BenchmarkGenLocalAddrFunc/map1 BenchmarkGenLocalAddrFunc/map1-4 16184868 69.78 ns/op BenchmarkGenLocalAddrFunc/map2 BenchmarkGenLocalAddrFunc/map2-4 16878140 70.73 ns/op BenchmarkGenLocalAddrFunc/or1 BenchmarkGenLocalAddrFunc/or1-4 623055721 1.950 ns/op BenchmarkGenLocalAddrFunc/or2 BenchmarkGenLocalAddrFunc/or2-4 472493098 2.589 ns/op Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
David Anderson	93a4aa697c	wgengine: default Router to a no-op router. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	440effb21a	wgengine: remove Config.TUN argument.	4 years ago
Josh Bleecher Snyder	4954fbfda6	wgengine: extend TestWatchdog timeout on macOS This works around the close syscall being slow. We can revert this if we find a fix or if Apple makes close fast again. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
David Anderson	2df8adef9d	wgengine: make the tun.Device required at construction. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	016de16b2e	net/tstun: rename TUN to Wrapper. The tstun packagen contains both constructors for generic tun Devices, and a wrapper that provides additional functionality. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	82ab7972f4	net/tstun: rename NewFakeTUN to NewFake. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	588b70f468	net/tstun: merge in wgengine/tstun. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	2b4bfeda1a	wgengine: pass in an explicit router.Router, rather than a generator. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	44d9929208	wgengine: remove Config.TUNName, require caller to create device. Also factors out device creation and associated OS workarounds to net/tun. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	0a84aaca0a	wgengine/router: remove unused wireguard *Device argument. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
Brad Fitzpatrick	bcf571ec97	wgengine/monitor: fix OpenBSD build Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	7f174e84e6	net/interfaces: remove mutating methods, add EqualFiltered instead Now callers (wgengine/monitor) don't need to mutate the state to remove boring interfaces before calling State.Equal. Instead, the methods to remove boring interfaces from the State are removed, as is the reflect-using Equal method itself, and in their place is a new EqualFiltered method that takes a func predicate to match interfaces to compare. And then the FilterInteresting predicate is added for use with EqualFiltered to do the job that that wgengine/monitor previously wanted. Now wgengine/monitor can keep the full interface state around, including the "boring" interfaces, which we'll need for peerapi on macOS/iOS to bind to the interface index of the utunN device. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
David Anderson	672731ac6f	many: gofmt. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	6521f02ff6	Move DNS flush logic to net/dns. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	9f7f2af008	wgengine/router/dns: move to net/dns. Preparation for merging the APIs and whatnot. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	8432999835	Move wgengine/tsdns to net/dns. Straight move+fixup, no other changes. In prep for merging with wgengine/router/dns. Signed-off-by: David Anderson <danderson@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
Josh Bleecher Snyder	28af46fb3b	wgengine: pass logger as a separate arg to device.NewDevice Adapt to minor API changes in wireguard-go. And factor out device.DeviceOptions variables. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
Brad Fitzpatrick	2384c112c9	net/packet, wgengine/{filter,tstun}: add TSMP ping Fixes #1467 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Josh Bleecher Snyder	4b77eca2de	wgengine/magicsock: check returned error in addTestEndpoint Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago

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758 Commits (69cdc30c6d41aab287e6d262827a8f92eafb2ee7)