tailscale

Commit Graph

Author	SHA1	Message	Date
Josh Bleecher Snyder	6ef734e493	wgengine: predict min.Peers length across calls The number of peers we have will be pretty stable across time. Allocate roughly the right slice size. This reduces memory usage when there are many peers. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Josh Bleecher Snyder	adf696172d	wgengine/userspace: reduce allocations in getStatus Two optimizations. Use values instead of pointers. We were using pointers to make track the "peer in progress" easier. It's not too hard to do it manually, though. Make two passes through the data, so that we can size our return value accurately from the beginning. This is cheap enough compared to the allocation, which grows linearly in the number of peers, that it is worth doing. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Brad Fitzpatrick	a729070252	net/tstun: add start of Linux TAP support, with DHCP+ARP server Still very much a prototype (hard-coded IPs, etc) but should be non-invasive enough to submit at this point and iterate from here. Updates #2589 Co-Author: David Crawshaw <crawshaw@tailscale.com> Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Josh Bleecher Snyder	f6e833748b	wgengine: use mono.Time Migrate wgengine to mono.Time for performance-sensitive call sites. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Brad Fitzpatrick	5c266bdb73	wgengine: re-set DNS config on Linux after a major link change Updates #2458 (maybe fixes it) Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Joe Tsai	9a0c8bdd20	util/deephash: make hash type opaque The fact that Hash returns a [sha256.Size]byte leaks details about the underlying hash implementation. This could very well be any other hashing algorithm with a possible different block size. Abstract this implementation detail away by declaring an opaque type that is comparable. While we are changing the signature of UpdateHash, rename it to just Update to reduce stutter (e.g., deephash.Update). Signed-off-by: Joe Tsai <joetsai@digital-static.net>	3 years ago
Brad Fitzpatrick	700badd8f8	util/deephash: move internal/deephash to util/deephash No code changes. Just a minor package doc addition about lack of API stability.	3 years ago
Brad Fitzpatrick	c45bfd4180	wgengine: make dnsIPsOverTailscale also consider DefaultResolvers Found during a failed experiment debugging something on Android. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	45e64f2e1a	net/dns{,/resolver}: refactor DNS forwarder, send out of right link on macOS/iOS Fixes #2224 Fixes tailscale/corp#2045 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
David Crawshaw	4ce15505cb	wgengine: randomize client port if netmap says to For testing out #2187 Signed-off-by: David Crawshaw <crawshaw@tailscale.com>	3 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	73adbb7a78	wgengine: pass an addressable value to deephash.UpdateHash This makes deephash more efficient. 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
Brad Fitzpatrick	36a26e6a71	internal/deephash: rename from deepprint Yes, it printed, but that was an implementation detail for hashing. And coming optimization will make it print even less. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Josh Bleecher Snyder	68911f6778	wgengine/bench: ignore "engine closing" errors On benchmark completion, we shut down the wgengine. If we happen to poll for status during shutdown, we get an "engine closing" error. It doesn't hurt anything; ignore it. Fixes tailscale/corp#1776 Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
Josh Bleecher Snyder	73ad1f804b	wgengine/wgcfg: use autogenerated Clone methods Delete the manually written ones named Copy. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
Josh Bleecher Snyder	ed63a041bf	wgengine/userspace: delete HandshakeDone It is unused, and has been since early Feb 2021 (Tailscale 1.6). We can't get delete the DeviceOptions entirely yet; first #1831 and #1839 need to go in, along with some wireguard-go changes. Deleting this chunk of code now will make the later commits more clearly correct. Pingers can now go too. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
Brad Fitzpatrick	7629cd6120	net/tsaddr: add NewContainsIPFunc (move from wgengine) I want to use this from netstack but it's not exported. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	bb2141e0cf	wgengine: periodically poll engine status for logging side effect Fixes tailscale/corp#1560 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	3c9dea85e6	wgengine: update a log line from 'weird' to conventional 'unexpected' Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Josh Bleecher Snyder	99705aa6b7	net/tstun: split TUN events channel into up/down and MTU We had a long-standing bug in which our TUN events channel was being received from simultaneously in two places. The first is wireguard-go. At wgengine/userspace.go:366, we pass e.tundev to wireguard-go, which starts a goroutine (RoutineTUNEventReader) that receives from that channel and uses events to adjust the MTU and bring the device up/down. At wgengine/userspace.go:374, we launch a goroutine that receives from e.tundev, logs MTU changes, and triggers state updates when up/down changes occur. Events were getting delivered haphazardly between the two of them. We don't really want wireguard-go to receive the up/down events; we control the state of the device explicitly by calling device.Up. And the userspace.go loop MTU logging duplicates logging that wireguard-go does when it received MTU updates. So this change splits the single TUN events channel into up/down and other (aka MTU), and sends them to the parties that ought to receive them. I'm actually a bit surprised that this hasn't caused more visible trouble. If a down event went to wireguard-go but the subsequent up event went to userspace.go, we could end up with the wireguard-go device disappearing. I believe that this may also (somewhat accidentally) be a fix for #1790. Signed-off-by: Josh Bleecher Snyder <josharian@gmail.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
David Anderson	854d5d36a1	net/dns: return error from NewOSManager, use it to initialize NM. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	84430cdfa1	net/dns: improve NetworkManager detection, using more DBus. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
Brad Fitzpatrick	d488678fdc	cmd/tailscaled, wgengine{,/netstack}: add netstack hybrid mode, add to Windows For #707 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
David Anderson	7d84ee6c98	net/dns: unify the OS manager and internal resolver. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	1bf91c8123	net/dns/resolver: remove unused err return value. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	f007a9dd6b	health: add DNS subsystem and plumb errors in. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	4c61ebacf4	wgengine: move DNS configuration out of wgengine/router. 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
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
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
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
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
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

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221 Commits (edb338f54255bf22b114ca12c434f9e53af487e1)