1023 Commits (3181bbb8e4aea869a67c19cea6877bc9a6c4467d)

Author	SHA1	Message	Date
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
Brad Fitzpatrick	95a9adbb97	wgengine/netstack: implement UDP relaying to advertised subnets ... TCP was done in 662fbd4a09. This does the same for UDP. Tested by hand. Integration tests will have to come later. I'd wanted to do it in this commit, but the SOCKS5 server needed for interop testing between two userspace nodes doesn't yet support UDP and I didn't want to invent some whole new userspace packet injection interface at this point, as SOCKS seems like a better route, but that's its own bug. Fixes #2302 RELNOTE=netstack mode can now UDP relay to subnets Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	ecac74bb65	wgengine/netstack: fix doc comment ... Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	e4fecfe31d	wgengine/{monitor,router}: restore Linux ip rules when systemd deletes them ... Thanks. Fixes #1591 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	ed8587f90d	wgengine/router: take a link monitor ... Prep for #1591 which will need to make Linux's router react to changes that the link monitor observes. The router package already depended on the monitor package transitively. Now it's explicit. 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
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	e41193ec4d	wgengine/monitor: don't spam about Linux RTM_NEWRULE events ... The earlier 2ba36c294b started listening for ip rule changes and only cared about DELRULE events, buts its subscription included all rule events, including new ones, which meant we were then catching our own ip rule creations and logging about how they were unknown. Stop that log spam. Updates #1591 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	2ba36c294b	wgengine/monitor: subscribe to Linux ip rule events, log on rule deletes ... For debugging & working on #1591 where certain versions of systemd-networkd delete Tailscale's ip rule entries. Updates #1591 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Josh Bleecher Snyder	4f4dae32dd	wgengine/magicsock: fix latent data race in test ... logBufWriter had no serialization. It just so happens that none of its users currently ever log concurrently. Make it safe for concurrent use. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
julianknodt	fb06ad19e7	wgcfg: Switch to using mem.RO ... As Brad suggested, mem.RO allows for a lot of easy perf gains. There were also some smaller changes outside of mem.RO, such as using hex.Decode instead of hex.DecodeString. ``` name old time/op new time/op delta FromUAPI-8 14.7µs ± 3% 12.3µs ± 4% -16.58% (p=0.008 n=5+5) name old alloc/op new alloc/op delta FromUAPI-8 9.52kB ± 0% 7.04kB ± 0% -26.05% (p=0.008 n=5+5) name old allocs/op new allocs/op delta FromUAPI-8 77.0 ± 0% 29.0 ± 0% -62.34% (p=0.008 n=5+5) ``` Signed-off-by: julianknodt <julianknodt@gmail.com>	3 years ago
julianknodt	d349a3231e	wgcfg: use string cut instead of string split ... Signed-off-by: julianknodt <julianknodt@gmail.com>	3 years ago
julianknodt	664edbe566	wgcfg: add benchmark for FromUAPI ... Adds a benchmark for FromUAPI in wgcfg. It appears that it's not actually that slow, the main allocations are from the scanner and new config. Updates #1912. Signed-off-by: julianknodt <julianknodt@gmail.com>	3 years ago
Brad Fitzpatrick	7e7c4c1bbe	tailcfg: break DERPNode.DERPTestPort into DERPPort & InsecureForTests ... The DERPTestPort int meant two things before: which port to use, and whether to disable TLS verification. Users would like to set the port without disabling TLS, so break it into two options. Updates #1264 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	92077ae78c	wgengine/magicsock: make portmapping async ... Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	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
Maisem Ali	ec52760a3d	wgengine/router_windows: support toggling local lan access when using ... exit nodes. Signed-off-by: Maisem Ali <maisem@tailscale.com>	3 years ago
Brad Fitzpatrick	722859b476	wgengine/netstack: make SOCKS5 resolve names to IPv6 if self node when no IPv4 ... For instance, ephemeral nodes with only IPv6 addresses can now SOCKS5-dial out to names like "foo" and resolve foo's IPv6 address rather than foo's IPv4 address and get a "no route" (*tcpip.ErrNoRoute) error from netstack's dialer. Per https://github.com/tailscale/tailscale/issues/2268#issuecomment-870027626 which is only part of the isuse. Updates #2268 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
julianknodt	506c2fe8e2	cmd/tailscale: make netcheck use active DERP map, delete static copy ... After allowing for custom DERP maps, it's convenient to be able to see their latency in netcheck. This adds a query to the local tailscaled for the current DERPMap. Updates #1264 Signed-off-by: julianknodt <julianknodt@gmail.com>	3 years ago
Christine Dodrill	59e9b44f53	wgengine/filter: add a debug flag for filter logs (#2241) ... This uses a debug envvar to optionally disable filter logging rate limits by setting the environment variable TS_DEBUG_FILTER_RATE_LIMIT_LOGS to "all", and if it matches, the code will effectively disable the limits on the log rate by setting the limit to 1 millisecond. This should make sure that all filter logs will be captured. Signed-off-by: Christine Dodrill <xe@tailscale.com>	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	b92e2ebd24	wgengine/netstack: add Impl.DialContextUDP ... Unused so far, but eventually we'll want this for SOCKS5 UDP binds (we currently only do TCP with SOCKS5), and also for #2102 for forwarding MagicDNS upstream to Tailscale IPs over netstack. Updates #2102 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
David Crawshaw	5f8ffbe166	magicsock: add SetPreferredPort method ... Signed-off-by: David Crawshaw <crawshaw@tailscale.com>	3 years ago
Brad Fitzpatrick	80a4052593	cmd/tailscale, wgengine, tailcfg: don't assume LastSeen is present [mapver 20] ... Updates #2107 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Fletcher Nichol	a49df5cfda	wgenine/router: fix OpenBSD route creation ... The route creation for the `tun` device was augmented in #1469 but didn't account for adding IPv4 vs. IPv6 routes. There are 2 primary changes as a result: * Ensure that either `-inet` or `-inet6` was used in the [`route(8)`](https://man.openbsd.org/route) command * Use either the `localAddr4` or `localAddr6` for the gateway argument depending which destination network is being added The basis for the approach is based on the implementation from `router_userspace_bsd.go`, including the `inet()` helper function. Fixes #2048 References #1469 Signed-off-by: Fletcher Nichol <fnichol@nichol.ca>	3 years ago
Josh Bleecher Snyder	e92fd19484	wgengine/wglog: match upstream wireguard-go's code for wireguardGoString ... It is a bit faster. But more importantly, it matches upstream byte-for-byte, which ensures there'll be no corner cases in which we disagree. name old time/op new time/op delta SetPeers-8 3.58µs ± 0% 3.16µs ± 2% -11.74% (p=0.016 n=4+5) name old alloc/op new alloc/op delta SetPeers-8 2.53kB ± 0% 2.53kB ± 0% ~ (all equal) name old allocs/op new allocs/op delta SetPeers-8 99.0 ± 0% 99.0 ± 0% ~ (all equal) Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Brad Fitzpatrick	a321c24667	go.mod: update netaddr ... Involves minor IPSetBuilder.Set API change. Signed-off-by: Brad Fitzpatrick <bradfitz@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>	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>	3 years ago
Josh Bleecher Snyder	ceaaa23962	wgengine/wglog: cache strings ... We repeat many peers each time we call SetPeers. Instead of constructing strings for them from scratch every time, keep strings alive across iterations. name old time/op new time/op delta SetPeers-8 3.58µs ± 1% 2.41µs ± 1% -32.60% (p=0.000 n=9+10) name old alloc/op new alloc/op delta SetPeers-8 2.53kB ± 0% 1.30kB ± 0% -48.73% (p=0.000 n=10+10) name old allocs/op new allocs/op delta SetPeers-8 99.0 ± 0% 16.0 ± 0% -83.84% (p=0.000 n=10+10) We could reduce alloc/op 12% and allocs/op 23% if strs had type map[string]strCache instead of map[string]*strCache, but that wipes out the execution time impact. Given that re-use is the most common scenario, let's optimize for it. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 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>	3 years ago
Josh Bleecher Snyder	8bf2a38f29	go.mod: update wireguard-go, taking control over iOS memory usage from our fork ... Our wireguard-go fork used different values from upstream for package device's memory limits on iOS. This was the last blocker to removing our fork. These values are now vars rather than consts for iOS. c27ff9b9f6 Adjust them on startup to our preferred values. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 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
Brad Fitzpatrick	5b52b64094	tsnet: add Tailscale-as-a-library package ... Signed-off-by: Brad Fitzpatrick <bradfitz@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	98cae48e70	wgengine/wglog: optimize wireguardGoString ... The new code is ugly, but much faster and leaner. name old time/op new time/op delta SetPeers-8 7.81µs ± 1% 3.59µs ± 1% -54.04% (p=0.000 n=9+10) name old alloc/op new alloc/op delta SetPeers-8 7.68kB ± 0% 2.53kB ± 0% -67.08% (p=0.000 n=10+10) name old allocs/op new allocs/op delta SetPeers-8 237 ± 0% 99 ± 0% -58.23% (p=0.000 n=10+10) Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
Josh Bleecher Snyder	9356912053	wgengine/wglog: add BenchmarkSetPeer ... Because it showed up on hello profiles. Cycle through some moderate-sized sets of peers. This should cover the "small tweaks to netmap" and the "up/down cycle" cases. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.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	773fcfd007	Revert "wgengine/bench: skip flaky test" ... This reverts commit d707e2f7e5. Signed-off-by: Josh Bleecher Snyder <josh@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
Brad Fitzpatrick	d707e2f7e5	wgengine/bench: skip flaky test ... Updates tailscale/corp#1776 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Josh Bleecher Snyder	8d2a90529e	wgengine/bench: hold lock in TrafficGen.GotPacket while calling first packet callback ... Without any synchronization here, the "first packet" callback can be delayed indefinitely, while other work continues. Since the callback starts the benchmark timer, this could skew results. Worse, if the benchmark manages to complete before the benchmark timer begins, it'll cause a data race with the benchmark shutdown performed by package testing. That is what is reported in #1881. This is a bit unfortunate, in that it means that users of TrafficGen have to be careful to keep this callback speedy and lightweight and to avoid deadlocks. Fixes #1881 Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
Josh Bleecher Snyder	a72fb7ac0b	wgengine/bench: handle multiple Engine status callbacks ... It is possible to get multiple status callbacks from an Engine. We need to wait for at least one from each Engine. Without limiting to one per Engine, wait.Wait can exit early or can panic due to a negative counter. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
Josh Bleecher Snyder	6618e82ba2	wgengine/bench: close Engines on benchmark completion ... This reduces the speed with which these benchmarks exhaust their supply fds. Not to zero unfortunately, but it's still helpful when doing long runs. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.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	e0bd3cc70c	wgengine/magicsock: use netaddr.MustParseIPPrefix ... Delete our bespoke helper. 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	9bce1b7fc1	wgengine/wgcfg: make device test endpoint-format-agnostic ... By using conn.NewDefaultBind, this test requires that our endpoints be comprehensible to wireguard-go. Instead, use a no-op bind that treats endpoints as opaque strings. 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	a0dacba877	wgengine/magicsock: simplify legacy endpoint DstToString ... Legacy endpoints (addrSet) currently reconstruct their dst string when requested. Instead, store the dst string we were given to begin with. In addition to being simpler and cheaper, this makes less code aware of how to interpret endpoint strings. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
Josh Bleecher Snyder	777c816b34	wgengine/wgcfg: return better errors from DeviceConfig, ReconfigDevice ... Prefer the error from the actual wireguard-go device method call, not {To,From}UAPI, as those tend to be less interesting I/O errors. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
Josh Bleecher Snyder	1f6c4ba7c3	wgengine/wgcfg: prevent ReconfigDevice from hanging on error ... When wireguard-go's UAPI interface fails with an error, ReconfigDevice hangs. Fix that by buffering the channel and closing the writer after the call. The code now matches the corresponding code in DeviceConfig, where I got it right. 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	b8fb8264a5	wgengine/netstack: avoid delivering incoming packets to both netstack + host ... The earlier eb06ec172f fixed the flaky SSH issue (tailscale/corp#1725) by making sure that packets addressed to Tailscale IPs in hybrid netstack mode weren't delivered to netstack, but another issue remained: All traffic handled by netstack was also potentially being handled by the host networking stack, as the filter hook returned "Accept", which made it keep processing. This could lead to various random racey chaos as a function of OS/firewalls/routes/etc. Instead, once we inject into netstack, stop our caller's packet processing. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	1a1123d461	wgengine: fix pendopen debug to not track SYN+ACKs, show Node.Online state ... Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	eb06ec172f	wgengine/netstack: don't pass non-subnet traffic to netstack in hybrid mode ... Fixes tailscale/corp#1725 Signed-off-by: Brad Fitzpatrick <bradfitz@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
Josh Bleecher Snyder	47ebd1e9a2	wgengine/router: use net.IP.Equal instead of bytes.Equal to compare IPs ... Signed-off-by: Josh Bleecher Snyder <josharian@gmail.com>	4 years ago
Josh Bleecher Snyder	f91c2dfaca	wgengine/router: remove unused field ... Signed-off-by: Josh Bleecher Snyder <josharian@gmail.com>	4 years ago
Josh Bleecher Snyder	9360f36ebd	all: use lower-case letters at the start of error message ... Signed-off-by: Josh Bleecher Snyder <josharian@gmail.com>	4 years ago
Josh Bleecher Snyder	64047815b0	wgenengine/magicsock: delete cursed tests ... Signed-off-by: Josh Bleecher Snyder <josharian@gmail.com>	4 years ago
Josh Bleecher Snyder	59026a291d	wgengine/wglog: improve wireguard-go logging rate limiting ... Prior to wireguard-go using printf-style logging, all wireguard-go logging occurred using format string "%s". We fixed that but continued to use %s when we rewrote peer identifiers into Tailscale style. This commit removes that %sl, which makes rate limiting work correctly. As a happy side-benefit, it should generate less garbage. Instead of replacing all wireguard-go peer identifiers that might occur anywhere in a fully formatted log string, assume that they only come from args. Check all args for things that look like *device.Peers and replace them with appropriately reformatted strings. There is a variety of ways that this could go wrong (unusual format verbs or modifiers, peer identifiers occurring as part of a larger printed object, future API changes), but none of them occur now, are likely to be added, or would be hard to work around if they did. Signed-off-by: Josh Bleecher Snyder <josharian@gmail.com>	4 years ago
Josh Bleecher Snyder	1f94d43b50	wgengine/wglog: delay formatting ... The "stop phrases" we use all occur in wireguard-go in the format string. We can avoid doing a bunch of fmt.Sprintf work when they appear. Signed-off-by: Josh Bleecher Snyder <josharian@gmail.com>	4 years ago
Josh Bleecher Snyder	20e04418ff	net/dns: add GOOS build tags ... Fixes #1786 Signed-off-by: Josh Bleecher Snyder <josharian@gmail.com>	4 years ago
Josh Bleecher Snyder	7ee891f5fd	all: delete wgcfg.Key and wgcfg.PrivateKey ... For historical reasons, we ended up with two near-duplicate copies of curve25519 key types, one in the wireguard-go module (wgcfg) and one in the tailscale module (types/wgkey). Then we moved wgcfg to the tailscale module. We can now remove the wgcfg key type in favor of wgkey. Signed-off-by: Josh Bleecher Snyder <josharian@gmail.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
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	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	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
Avery Pennarun	a7fe1d7c46	wgengine/bench: improved rate selection. ... The old decay-based one took a while to converge. This new one (based very loosely on TCP BBR) seems to converge quickly on what seems to be the best speed. Signed-off-by: Avery Pennarun <apenwarr@tailscale.com>	4 years ago
Avery Pennarun	a92b9647c5	wgengine/bench: speed test for channels, sockets, and wireguard-go. ... This tries to generate traffic at a rate that will saturate the receiver, without overdoing it, even in the event of packet loss. It's unrealistically more aggressive than TCP (which will back off quickly in case of packet loss) but less silly than a blind test that just generates packets as fast as it can (which can cause all the CPU to be absorbed by the transmitter, giving an incorrect impression of how much capacity the total system has). Initial indications are that a syscall about every 10 packets (TCP bulk delivery) is roughly the same speed as sending every packet through a channel. A syscall per packet is about 5x-10x slower than that. The whole tailscale wireguard-go + magicsock + packet filter combination is about 4x slower again, which is better than I thought we'd do, but probably has room for improvement. Note that in "full" tailscale, there is also a tundev read/write for every packet, effectively doubling the syscall overhead per packet. Given these numbers, it seems like read/write syscalls are only 25-40% of the total CPU time used in tailscale proper, so we do have significant non-syscall optimization work to do too. Sample output: $ GOMAXPROCS=2 go test -bench . -benchtime 5s ./cmd/tailbench goos: linux goarch: amd64 pkg: tailscale.com/cmd/tailbench cpu: Intel(R) Core(TM) i7-4785T CPU @ 2.20GHz BenchmarkTrivialNoAlloc/32-2 56340248 93.85 ns/op 340.98 MB/s 0 %lost 0 B/op 0 allocs/op BenchmarkTrivialNoAlloc/124-2 57527490 99.27 ns/op 1249.10 MB/s 0 %lost 0 B/op 0 allocs/op BenchmarkTrivialNoAlloc/1024-2 52537773 111.3 ns/op 9200.39 MB/s 0 %lost 0 B/op 0 allocs/op BenchmarkTrivial/32-2 41878063 135.6 ns/op 236.04 MB/s 0 %lost 0 B/op 0 allocs/op BenchmarkTrivial/124-2 41270439 138.4 ns/op 896.02 MB/s 0 %lost 0 B/op 0 allocs/op BenchmarkTrivial/1024-2 36337252 154.3 ns/op 6635.30 MB/s 0 %lost 0 B/op 0 allocs/op BenchmarkBlockingChannel/32-2 12171654 494.3 ns/op 64.74 MB/s 0 %lost 1791 B/op 0 allocs/op BenchmarkBlockingChannel/124-2 12149956 507.8 ns/op 244.17 MB/s 0 %lost 1792 B/op 1 allocs/op BenchmarkBlockingChannel/1024-2 11034754 528.8 ns/op 1936.42 MB/s 0 %lost 1792 B/op 1 allocs/op BenchmarkNonlockingChannel/32-2 8960622 2195 ns/op 14.58 MB/s 8.825 %lost 1792 B/op 1 allocs/op BenchmarkNonlockingChannel/124-2 3014614 2224 ns/op 55.75 MB/s 11.18 %lost 1792 B/op 1 allocs/op BenchmarkNonlockingChannel/1024-2 3234915 1688 ns/op 606.53 MB/s 3.765 %lost 1792 B/op 1 allocs/op BenchmarkDoubleChannel/32-2 8457559 764.1 ns/op 41.88 MB/s 5.945 %lost 1792 B/op 1 allocs/op BenchmarkDoubleChannel/124-2 5497726 1030 ns/op 120.38 MB/s 12.14 %lost 1792 B/op 1 allocs/op BenchmarkDoubleChannel/1024-2 7985656 1360 ns/op 752.86 MB/s 13.57 %lost 1792 B/op 1 allocs/op BenchmarkUDP/32-2 1652134 3695 ns/op 8.66 MB/s 0 %lost 176 B/op 3 allocs/op BenchmarkUDP/124-2 1621024 3765 ns/op 32.94 MB/s 0 %lost 176 B/op 3 allocs/op BenchmarkUDP/1024-2 1553750 3825 ns/op 267.72 MB/s 0 %lost 176 B/op 3 allocs/op BenchmarkTCP/32-2 11056336 503.2 ns/op 63.60 MB/s 0 %lost 0 B/op 0 allocs/op BenchmarkTCP/124-2 11074869 533.7 ns/op 232.32 MB/s 0 %lost 0 B/op 0 allocs/op BenchmarkTCP/1024-2 8934968 671.4 ns/op 1525.20 MB/s 0 %lost 0 B/op 0 allocs/op BenchmarkWireGuardTest/32-2 1403702 4547 ns/op 7.04 MB/s 14.37 %lost 467 B/op 3 allocs/op BenchmarkWireGuardTest/124-2 780645 7927 ns/op 15.64 MB/s 1.537 %lost 420 B/op 3 allocs/op BenchmarkWireGuardTest/1024-2 512671 11791 ns/op 86.85 MB/s 0.5206 %lost 411 B/op 3 allocs/op PASS ok tailscale.com/wgengine/bench 195.724s Updates #414. Signed-off-by: Avery Pennarun <apenwarr@tailscale.com>	4 years ago
Maisem Ali	590792915a	wgengine/router{win}: ignore broadcast routes added by Windows when removing routes. ... Signed-off-by: Maisem Ali <maisem@tailscale.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
Brad Fitzpatrick	12b4672add	wgengine: quiet connection failure diagnostics for exit nodes ... The connection failure diagnostic code was never updated enough for exit nodes, so disable its misleading output when the node it picks (incorrectly) to diagnose is only an exit node. Fixes #1754 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Josh Bleecher Snyder	a29b0cf55f	wgengine/wglog: allow wireguard-go receive routines to log ... I've spent two days searching for a theoretical wireguard-go bug around receive functions exiting early. I've found many bugs, but none of the flavor we're looking for. Restore wireguard-go's logging around starting and stopping receive functions, so that we can definitively rule in or out this particular theory. Signed-off-by: Josh Bleecher Snyder <josharian@gmail.com>	4 years ago
Josh Bleecher Snyder	eb2a9d4ce3	wgengine/netstack: log error when acceptUDP fails ... I see a bunch of these in some logs I'm looking at, separated only by a few seconds. Log the error so we can tell what's going on here. Signed-off-by: Josh Bleecher Snyder <josharian@gmail.com>	4 years ago
Naman Sood	4a90a91d29	wgengine/netstack: log ForwarderRequest in readable form, only in debug mode (#1758) ... * wgengine/netstack: log ForwarderRequest in readable form, only in debug mode Fixes #1757 Signed-off-by: Naman Sood <mail@nsood.in>	4 years ago
Josh Bleecher Snyder	07c95a0219	wgengine/wgcfg/nmcfg: consolidate exit node log lines ... These were getting rate-limited for nodes with many peers. Consolate the output into single lines, which are nicer anyway. 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
Maisem Ali	4f3203556d	wgengine/router: add the Tailscale ULA route on darwin. ... Signed-off-by: Maisem Ali <maisem@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
Maisem Ali	1b9d8771dc	ipn/ipnlocal,wgengine/router,cmd/tailscale: add flag to allow local lan access when routing traffic via an exit node. ... For #1527 Signed-off-by: Maisem Ali <maisem@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
Brad Fitzpatrick	d5d70ae9ea	wgengine/monitor: reduce Linux log spam on down ... Fixes #1689 Signed-off-by: Brad Fitzpatrick <bradfitz@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
David Anderson	19eca34f47	wgengine/router: fix FreeBSD configuration failure on the v6 /48. ... On FreeBSD, we add the interface IP as a /48 to work around a kernel bug, so we mustn't then try to add a /48 route to the Tailscale ULA, since that will fail as a dupe. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	4a64d2a603	net/dns: some post-review cleanups. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	68f76e9aa1	net/dns: add GetBaseConfig to OSConfigurator interface. ... Part of #953, required to make split DNS work on more basic platforms. 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
Denton Gentry	3089081349	monitor/polling: reduce Cloud Run polling interval. ... Cloud Run's routes never change at runtime. Don't poll it for route changes very often. Signed-off-by: Denton Gentry <dgentry@tailscale.com>	4 years ago
David Anderson	de6dc4c510	net/dns: add a Primary field to OSConfig. ... Currently ignored. Signed-off-by: David Anderson <danderson@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	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	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
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	e2b3d9aa5f	all: s/Magic DNS/MagicDNS/ for consistency ... 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	96dfeb2d7f	wgengine: log tailscale pings ... Fixes #1561 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	85138d3183	health: track whether any network interface is up ... Fixes #1562 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	1eb95c7e32	net/packet, wgengine{,/filter}: remove net/packet IPProto forwarding consts ... Only use the ones in types/ipproto now. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	01b90df2fa	net/packet, wgengine/filter: support SCTP ... Add proto to flowtrack.Tuple. Add types/ipproto leaf package to break a cycle. Server-side ACL work remains. Updates #1516 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	90a6fb7ffe	tailcfg: add FilterRule.IPProto ... Updates #1516 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	c19ed37b0f	wgengine/magicsock: mark some legacy debug log output as verbose ... Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	aa79a57f63	wgengine/netstack: use inet.af/netstack, remove 64-bit only limitation ... This reverts the revert commit 84aba349d9. And changes us to use inet.af/netstack. Updates #1518 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
David Anderson	84aba349d9	Revert "wgengine/netstack: update gvisor to remove 64-bit only limitation" ... Breaks our corp repo due to gRPC dependency hell. This reverts commit d42f8b7f9a.	4 years ago
Brad Fitzpatrick	e0f2796b43	wgengine: don't diagnose iOS NWPathMonitor connection probe timeouts ... Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	0f90586da8	wgengine/monitor: skip more route messages on darwin ... Should help iOS battery life on NEProvider.wake/skip events with useless route updates that shouldn't cause re-STUNs. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	d42f8b7f9a	wgengine/netstack: update gvisor to remove 64-bit only limitation ... gVisor fixed their google/gvisor#1446 so we can include gVisor mode on 32-bit machines. A few minor upstream API changes, as normal. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	232cfda280	wgengine/router: report to control when setPrivateNetwork fails ... Fixes #1503 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
Naman Sood	770aa71ffb	client, cmd/hello, ipn, wgengine: fix whois for netstack-forwarded connections ... Updates #504 Updates #707 Signed-off-by: Naman Sood <mail@nsood.in>	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	d580b3f09e	wgengine/router: fix go vet failure on BSDs ... Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Aleksandar Pesic	25d2dd868b	wgengine/router: flushdns in windows when router config changes ... Fixes: https://github.com/tailscale/tailscale/issues/1430 Signed-off-by: Aleksandar Pesic <peske.nis@gmail.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	f9f3b67f3a	wgengine{,tsdns}: rebind MagicDNS forwarders on link change ... Fixes #1480 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
David Anderson	fa6110e47b	wgengine/router: don't touch interface routes ... Developed by a cast of dozens. Fixes #1448 Signed-off-by: David Anderson <danderson@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	0430c2dd12	wgengine/tsdns: truncate Map.PrettyDiffFrom string at 1KB ... Hello's were painful. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
David Anderson	d79a2f3809	wgengine/filter: only log packets to/from non-default routes. ... Fixes tailscale/corp#1429. Signed-off-by: David Anderson <danderson@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	fee74e7ea7	net/interfaces, wgengine/monitor: fix false positives link changes ... interfaces.State.String tries to print a concise summary of the network state, removing any interfaces that don't have any or any interesting IP addresses. On macOS and iOS, for instance, there are a ton of misc things. But the link monitor based its are-there-changes decision on interfaces.State.Equal, which just used reflect.DeepEqual, including comparing all the boring interfaces. On macOS, when turning wifi on or off, there are a ton of misc boring interface changes, resulting in hitting an earlier check I'd added on suspicion this was happening: [unexpected] network state changed, but stringification didn't This fixes that by instead adding a new interfaces.State.RemoveUninterestingInterfacesAndAddresses method that does, uh, that. Then use that in the monitor. So then when Equal is used later, it's DeepEqualing the already-cleaned version with only interesting interfaces. This makes cmd/tailscaled debug --monitor much less noisy. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Denton Gentry	04e72f95cc	wgengine/router: add OpenBSD IPv6 support. ... Similar to FreeBSD in https://github.com/tailscale/tailscale/issues/1307, add IPv6 addresses with a prefix length of 48. Fixes https://github.com/tailscale/tailscale/issues/1372 Signed-off-by: Denton Gentry <dgentry@tailscale.com>	4 years ago
Brad Fitzpatrick	c445e3d327	wgengine/magicsock: fix typo in comment	4 years ago