269 Commits (5611f290eb118eddc256560eaaa69f509347b4de)

Author	SHA1	Message	Date
Brad Fitzpatrick	84dc891843	cmd/tailscale/cli: add ping subcommand ... For example: $ tailscale ping -h USAGE ping <hostname-or-IP> FLAGS -c 10 max number of pings to send -stop-once-direct true stop once a direct path is established -verbose false verbose output $ tailscale ping mon.ts.tailscale.com pong from monitoring (100.88.178.64) via DERP(sfo) in 65ms pong from monitoring (100.88.178.64) via DERP(sfo) in 252ms pong from monitoring (100.88.178.64) via [2604:a880:2:d1::36:d001]:41641 in 33ms Fixes #661 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	9a346fd8b4	wgengine,magicsock: fix two lazy wireguard config issues ... 1) we weren't waking up a discoEndpoint that once existed and went idle for 5 minutes and then got a disco message again. 2) userspaceEngine.noteReceiveActivity had a buggy check; fixed and added a test	4 years ago
Brad Fitzpatrick	41c4560592	control/controlclient: remove unused NetworkMap.UAPI method ... And remove last remaining use of wgcfg.ToUAPI in a test's debug output; replace it with JSON.	4 years ago
Brad Fitzpatrick	cff737786e	wgengine/magicsock: fix lazy config deadlock, document more lock ordering ... This removes the atomic bool that tried to track whether we needed to acquire the lock on a future recursive call back into magicsock. Unfortunately that hack doesn't work because we also had a lock ordering issue between magicsock and userspaceEngine (see issue). This documents that too. Fixes #644	4 years ago
Brad Fitzpatrick	2bd9ad4b40	wgengine: fix deadlock between engine and magicsock	4 years ago
Brad Fitzpatrick	7c38db0c97	wgengine/magicsock: don't deadlock on pre-disco Endpoints w/ lazy wireguard configs ... Fixes tailscale/tailscale#637	4 years ago
Brad Fitzpatrick	4987a7d46c	wgengine/magicsock: when hard NAT, add stun-ipv4:static-port as candidate ... If a node is behind a hard NAT and is using an explicit local port number, assume they might've mapped a port and add their public IPv4 address with the local tailscaled's port number as a candidate endpoint.	4 years ago
Brad Fitzpatrick	bfcb0aa0be	wgengine/magicsock: deflake tests, Close deadlock again ... Better fix than 37903a9056 Fixes tailscale/corp#533	4 years ago
Dmytro Shynkevych	28e52a0492	all: dns refactor, add Proxied and PerDomain flags from control (#615) ... Signed-off-by: Dmytro Shynkevych <dmytro@tailscale.com>	4 years ago
Brad Fitzpatrick	cb970539a6	wgengine/magicsock: remove TODO comment that's no longer applicable	4 years ago
Brad Fitzpatrick	915f65ddae	wgengine/magicsock: stop disco activity on IPN stop ... Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	c180abd7cf	wgengine/magicsock: merge errClosed and errConnClosed	4 years ago
Brad Fitzpatrick	d55fdd4669	wgengine/magicsock: update, flesh out a TODO	4 years ago
David Anderson	f8e4c75f6b	wgengine/magicsock: check slightly less aggressively for connectivity. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
Brad Fitzpatrick	58b721f374	wgengine/magicsock: deflake some tests with an ugly hack ... Starting with fe68841dc7, some e2e tests got flaky. Rather than debug them (they're gnarly), just revert to the old behavior as far as those tests are concerned. The tests were somehow using magicsock without a private key and expecting it to do ... something. My goal with fe68841dc7 was to stop log spam and unnecessary work I saw on the iOS app when when stopping the app. Instead, only stop doing that work on any transition from once-had-a-private-key to no-longer-have-a-private-key. That fixes what I wanted to fix while still making the mysterious e2e tests happy.	4 years ago
David Anderson	41d0c81859	wgengine/magicsock: make disco subtest name more precise. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	9beea8b314	wgengine/magicsock: remove unnecessary use of context. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	b62341d308	wgengine/magicsock: add docstring. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	9265296b33	wgengine/magicsock: don't deadlock on shutdown if sending blocks. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	0249236cc0	ipn/ipnstate: record assigned Tailscale IPs. ... wgengine/magicsock: use ipnstate to find assigned Tailscale IPs. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	c3958898f1	tstest/natlab: be a bit more lenient during test shutdown. ... There is a race in natlab where we might start shutdown while natlab is still running a goroutine or two to deliver packets. This adds a small grace period to try and receive it before continuing shutdown. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	7578c815be	wgengine/magicsock: give pinger a more generous packet timeout. ... The first packet to transit may take several seconds to do so, because setup rates in wgengine may result in the initial WireGuard handshake init to get dropped. So, we have to wait at least long enough for a retransmit to correct the fault. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	c3994fd77c	derp: remove OnlyDisco option. ... Active discovery lets us introspect the state of the network stack precisely enough that it's unnecessary, and dropping the initial DERP packets greatly slows down tests. Additionally, it's unrealistic since our production network will never deliver _only_ discovery packets, it'll be all or nothing. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	5455c64f1d	wgengine/magicsock: add a test for two facing endpoint-independent NATs. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	f794493b4f	wgengine/magicsock: explicitly check path discovery, add a firewall test. ... The test proves that active discovery can traverse two facing firewalls. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	f582eeabd1	wgengine/magicsock: add a test for active path discovery. ... Uses natlab only, because the point of this active discovery test is going to be that it should get through a lot of obstacles. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
Brad Fitzpatrick	37903a9056	wgengine/magicsock: fix occasional deadlock on Conn.Close on c.derpStarted ... The deadlock was: * Conn.Close was called, which acquired c.mu * Then this goroutine scheduled: if firstDerp { startGate = c.derpStarted go func() { dc.Connect(ctx) close(c.derpStarted) }() } * The getRegion hook for that derphttp.Client then ran, which also tries to acquire c.mu. This change makes that hook first see if we're already in a closing state and then it can pretend that region doesn't exist.	4 years ago
Brad Fitzpatrick	fe68841dc7	wgengine/magicsock: log better with less spam on transition to stopped state ... Required a minor test update too, which now needs a private key to get far enough to test the thing being tested.	4 years ago
Brad Fitzpatrick	e298327ba8	wgengine/magicsock: remove overkill, slow reflect.DeepEqual of NetworkMap ... No need to allocate or compare all the fields we don't care about.	4 years ago
David Anderson	3669296cef	wgengine/magicsock: refactor twoDevicePing to make stack construction cleaner. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
Brad Fitzpatrick	16a9cfe2f4	wgengine: configure wireguard peers lazily, as needed ... wireguard-go uses 3 goroutines per peer (with reasonably large stacks & buffers). Rather than tell wireguard-go about all our peers, only tell it about peers we're actively communicating with. That means we need hooks into magicsock's packet receiving path and tstun's packet sending path to lazily create a wireguard peer on demand from the network map. This frees up lots of memory for iOS (where we have almost nothing left for larger domains with many users). We should ideally do this in wireguard-go itself one day, but that'd be a pretty big change. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	5066b824a6	wgengine/magicsock: don't log about disco ping timeouts if we have a working address ... Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	c06d2a8513	wgengine/magicsock: fix typo in comment	4 years ago
Brad Fitzpatrick	bf195cd3d8	wgengine/magicsock: reduce log verbosity of discovery messages ... Don't log heartbeat pings & pongs. Track the reason for pings and then only log the ping/pong traffic if it was for initial path discovery.	4 years ago
Brad Fitzpatrick	a6559a8924	wgengine/magicsock: run test DERP in mode where only disco packets allowed ... So we don't accidentally pass a NAT traversal test by having DERP pick up our slack when we really just wanted DERP as an OOB messaging channel.	4 years ago
Brad Fitzpatrick	10ac066013	all: fix vet warnings	4 years ago
Brad Fitzpatrick	d74c9aa95b	wgengine/magicsock: update comment, fix earlier commit ... 891898525c had a continue that meant the didCopy synchronization never ran. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	c976264bd1	wgengine/magicsock: gofmt	4 years ago
Dmytro Shynkevych	f3e2b65637	wgengine/magicsock: time.Sleep -> time.After ... Signed-off-by: Dmytro Shynkevych <dmytro@tailscale.com>	4 years ago
Dmytro Shynkevych	380ee76d00	wgengine/magicsock: make time.Sleep in runDerpReader respect cancellation. ... Before this patch, the 250ms sleep would not be interrupted by context cancellation, which would result in the goroutine sometimes lingering in tests (100ms grace period). Signed-off-by: Dmytro Shynkevych <dmytro@tailscale.com>	4 years ago
Dmytro Shynkevych	891898525c	wgengine/magicsock: make receive from didCopy respect cancellation. ... Very rarely, cancellation occurs between a successful send on derpRecvCh and a call to copyBuf on the receiving side. Without this patch, this situation results in <-copyBuf blocking indefinitely. Signed-off-by: Dmytro Shynkevych <dmytro@tailscale.com>	4 years ago
Brad Fitzpatrick	a2267aae99	wgengine: only launch pingers for peers predating the discovery protocol ... Peers advertising a discovery key know how to speak the discovery protocol and do their own heartbeats to get through NATs and keep NATs open. No need for the pinger except for with legacy peers.	4 years ago
David Anderson	45578b47f3	tstest/natlab: refactor PacketHandler into a larger interface. ... The new interface lets implementors more precisely distinguish local traffic from forwarded traffic, and applies different forwarding logic within Machines for each type. This allows Machines to be packet forwarders, which didn't quite work with the implementation of Inject. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
Dmytro Shynkevych	2f15894a10	wgengine/magicsock: wait for derphttp client goroutine to exit ... Signed-off-by: Dmytro Shynkevych <dmytro@tailscale.com>	4 years ago
David Anderson	88e8456e9b	wgengine/magicsock: add a connectivity test for facing firewalls. ... The test demonstrates that magicsock can traverse two stateful firewalls facing each other, that each require localhost to initiate connections. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	1f7b1a4c6c	wgengine/magicsock: rearrange TwoDevicePing test for future natlab tests. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	977381f9cc	wgengine/magicsock: make trivial natlab test pass. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
Brad Fitzpatrick	6c74065053	wgengine/magicsock, tstest/natlab: start hooking up natlab to magicsock ... Also adds ephemeral port support to natlab. Work in progress. Pairing with @danderson.	4 years ago
Brad Fitzpatrick	bd59bba8e6	wgengine/magicsock: stop discoEndpoint timers on Close ... And add some defensive early returns on c.closed.	4 years ago
Brad Fitzpatrick	de875a4d87	wgengine/magicsock: remove DisableSTUNForTesting	4 years ago
Brad Fitzpatrick	5c6d8e3053	netcheck, tailcfg, interfaces, magicsock: survey UPnP, NAT-PMP, PCP ... Don't do anything with UPnP, NAT-PMP, PCP yet, but see how common they are in the wild. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	6196b7e658	wgengine/magicsock: change API to not permit disco key changes ... Generate the disco key ourselves and give out the public half instead. Fixes #525	4 years ago
Brad Fitzpatrick	5132edacf7	wgengine/magicsock: fix data race from undocumented wireguard-go requirement ... Endpoints need to be Stringers apparently. Fixes tailscale/corp#422	4 years ago
Brad Fitzpatrick	630379a1d0	cmd/tailscale: add tailscale status region name, last write, consistently star ... There's a lot of confusion around what tailscale status shows, so make it better: show region names, last write time, and put stars around DERP too if active. Now stars are always present if activity, and always somewhere.	4 years ago
Brad Fitzpatrick	9a8700b02a	wgengine/magicsock: add discoEndpoint heartbeat ... Updates #483	4 years ago
Brad Fitzpatrick	9f930ef2bf	wgengine/magicsock: remove the discoEndpoint.timers map ... It ended up being more complicated than it was worth.	4 years ago
Brad Fitzpatrick	f5f3885b5b	wgengine/magicsock: bunch of misc discovery path cleanups ... * fix tailscale status for peers using discovery * as part of that, pull out disco address selection into reusable and testable discoEndpoint.addrForSendLocked * truncate ping/pong logged hex txids in half to eliminate noise * move a bunch of random time constants into named constants with docs * track a history of per-endpoint pong replies for future use & status display * add "send" and " got" prefix to discovery message logging immediately before the frame type so it's easier to read than searching for the "<-" or "->" arrows earlier in the line; but keep those as the more reasily machine readable part for later. Updates #483	4 years ago
Brad Fitzpatrick	6c70cf7222	wgengine/magicsock: stop ping timeout timer on pong receipt, misc log cleanup ... Updates #483	4 years ago
Brad Fitzpatrick	c52905abaa	wgengine/magicsock: log less on no-op disco route switches ... Also, renew trustBestAddrUntil even if latency isn't better.	4 years ago
Brad Fitzpatrick	0f0ed3dca0	wgengine/magicsock: clean up discovery logging ... Updates #483	4 years ago
Brad Fitzpatrick	056fbee4ef	wgengine/magicsock: add TS_DEBUG_OMIT_LOCAL_ADDRS knob to force STUN use only ... For debugging.	4 years ago
Brad Fitzpatrick	e03cc2ef57	wgengine/magicsock: populate discoOfAddr upon receiving ping frames ... Updates #483	4 years ago
Brad Fitzpatrick	275a20f817	wgengine/magicsock: keep discoOfAddr populated, use it for findEndpoint ... Update the mapping from ip:port to discokey, so when we retrieve a packet from the network, we can find the same conn.Endpoint that we gave to wireguard-go previously, without making it think we've roamed. (We did, but we're not using its roaming.) Updates #483	4 years ago
Brad Fitzpatrick	77e89c4a72	wgengine/magicsock: handle CallMeMaybe discovery mesages ... Roughly feature complete now. Testing and polish remains. Updates #483	4 years ago
Brad Fitzpatrick	710ee88e94	wgengine/magicsock: add timeout on discovery pings, clean up state ... Updates #483	4 years ago
Brad Fitzpatrick	77d3ef36f4	wgengine/magicsock: hook up discovery messages, upgrade to LAN works ... Ping messages now go out somewhat regularly, pong replies are sent, and pong replies are now partially handled enough to upgrade off DERP to LAN. CallMeMaybe packets are sent & received over DERP, but aren't yet handled. That's next (and regular maintenance timers), and then WAN should work. Updates #483	4 years ago
Brad Fitzpatrick	9b8ca219a1	wgengine/magicsock: remove allocs in UDP write, use new netaddr.PutUDPAddr ... The allocs were only introduced yesterday with a TODO. Now they're gone again.	4 years ago
Brad Fitzpatrick	7b3c0bb7f6	wgengine/magicsock: fix crash reading DERP packet ... Starting at yesterday's e96f22e560 (convering some UDPAddrs to IPPorts), Conn.ReceiveIPv4 could return a nil addr, which would make its way through wireguard-go and blow up later. The DERP read path wasn't initializing the addr result parameter any more, and wgRecvAddr wasn't checking it either. Fixes #515	4 years ago
Brad Fitzpatrick	47b4a19786	wgengine/magicsock: use netaddr.ParseIPPort instead of net.ResolveUDPAddr	4 years ago
Brad Fitzpatrick	f7124c7f06	wgengine/magicsock: start of discoEndpoint state tracking ... Updates #483	4 years ago
Brad Fitzpatrick	92252b0988	wgengine/magicsock: add a little LRU cache for netaddr.IPPort lookups ... And while plumbing, a bit of discovery work I'll need: the endpointOfAddr map to map from validated paths to the discoEndpoint. Not being populated yet. Updates #483	4 years ago
Brad Fitzpatrick	2d6e84e19e	net/netcheck, wgengine/magicsock: replace more UDPAddr with netaddr.IPPort	4 years ago
Brad Fitzpatrick	9070aacdee	wgengine/magicsock: minor comments & logging & TODO changes	4 years ago
Brad Fitzpatrick	e96f22e560	wgengine/magicsock: start handling disco message, use netaddr.IPPort more ... Updates #483	4 years ago
Brad Fitzpatrick	a83ca9e734	wgengine/magicsock: cache precomputed nacl/box shared keys ... Updates #483	4 years ago
Brad Fitzpatrick	a975e86bb8	wgengine/magicsock: add new endpoint type used for discovery-supporting peers ... This adds a new magicsock endpoint type only used when both sides support discovery (that is, are advertising a discovery key). Otherwise the old code is used. So far the new code only communicates over DERP as proof that the new code paths are wired up. None of the actually discovery messaging is implemented yet. Support for discovery (generating and advertising a key) are still behind an environment variable for now. Updates #483	4 years ago
Brad Fitzpatrick	103c06cc68	wgengine/magicsock: open discovery naclbox messages from known peers ... And track known peers. Doesn't yet do anything with the messages. (nor does it send any yet) Start of docs on the message format. More will come in subsequent changes. Updates #483	4 years ago
Brad Fitzpatrick	23e74a0f7a	wgengine, magicsock, tstun: don't regularly STUN when idle (mobile only for now) ... If there's been 5 minutes of inactivity, stop doing STUN lookups. That means NAT mappings will expire, but they can resume later when there's activity again. We'll do this for all platforms later. Updates tailscale/corp#320 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	fe50cd0c48	ipn, wgengine: plumb NetworkMap down to magicsock ... Now we can have magicsock make decisions based on tailcfg.Debug settings sent by the server. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Dmytro Shynkevych	de5f6d70a8	magicsock: eliminate logging race in test ... Signed-off-by: Dmytro Shynkevych <dmytro@tailscale.com>	5 years ago
Brad Fitzpatrick	53fb25fc2f	all: generate discovery key, plumb it around ... Not actually used yet. Updates #483	5 years ago
Brad Fitzpatrick	abd79ea368	derp: reduce DERP memory use; don't require callers to pass in memory to use ... The magicsock derpReader was holding onto 65KB for each DERP connection forever, just in case. Make the derp{,http}.Client be in charge of memory instead. It can reuse its bufio.Reader buffer space.	5 years ago
Brad Fitzpatrick	280e8884dd	wgengine/magicsock: limit redundant log spam on packets from low-pri addresses ... Fixes #407 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	5 years ago
Brad Fitzpatrick	9e5d79e2f1	wgengine/magicsock: drop a bytes.Buffer sync.Pool, use logger.ArgWriter instead	5 years ago
Brad Fitzpatrick	becce82246	net/netns, misc tests: remove TestOnlySkipPrivilegedOps, argv checks ... The netns UID check is sufficient for now. We can do something else later if/when needed.	5 years ago
David Anderson	5114df415e	net/netns: set the bypass socket mark on linux. ... This allows tailscaled's own traffic to bypass Tailscale-managed routes, so that things like tailscale-provided default routes don't break tailscaled itself. Progress on #144. Signed-off-by: David Anderson <danderson@tailscale.com>	5 years ago
Brad Fitzpatrick	db2a216561	wgengine/magicsock: don't log on UDP send errors if address family known missing ... Fixes #376	5 years ago
Brad Fitzpatrick	9e3ad4f79f	net/netns: add package for start of network namespace support ... And plumb in netcheck STUN packets. TODO: derphttp, logs, control. Updates #144 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	5 years ago
Brad Fitzpatrick	a428656280	wgengine/magicsock: don't report v4 localhost addresses on IPv6-only systems ... Updates #376	5 years ago
Avery Pennarun	30e5c19214	magicsock: work around race condition initializing .Regions[]. ... Signed-off-by: Avery Pennarun <apenwarr@tailscale.com>	5 years ago
Brad Fitzpatrick	b0c10fa610	stun, netcheck: move under net	5 years ago
Brad Fitzpatrick	e6b84f2159	all: make client use server-provided DERP map, add DERP region support ... Instead of hard-coding the DERP map (except for cmd/tailscale netcheck for now), get it from the control server at runtime. And make the DERP map support multiple nodes per region with clients picking the first one that's available. (The server will balance the order presented to clients for load balancing) This deletes the stunner package, merging it into the netcheck package instead, to minimize all the config hooks that would've been required. Also fix some test flakes & races. Fixes #387 (Don't hard-code the DERP map) Updates #388 (Add DERP region support) Fixes #399 (wgengine: flaky tests) Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	5 years ago
David Anderson	e8b3a5e7a1	wgengine/filter: implement a destination IP pre-filter. ... Signed-off-by: David Anderson <danderson@tailscale.com>	5 years ago
Brad Fitzpatrick	e6d0c92b1d	wgengine/magicsock: clean up earlier fix a bit ... Move WaitReady from fc88e34f42 into the test code, and keep the derp-reading goroutine named for debugging.	5 years ago
Avery Pennarun	fc88e34f42	wgengine/magicsock/tests: wait for home DERP connection before sending packets. ... This fixes an elusive test flake. Fixes #161. Signed-off-by: Avery Pennarun <apenwarr@tailscale.com>	5 years ago
Avery Pennarun	4f128745d8	magicsock/test: oops, fix a data race in nested-test logf hack. ... Signed-off-by: Avery Pennarun <apenwarr@tailscale.com>	5 years ago
Avery Pennarun	42a0e0c601	wgengine/magicsock/tests: call tstest.ResourceCheck for each test. ... This didn't catch anything yet, but it's good practice for detecting goroutine leaks that we might not find otherwise. Signed-off-by: Avery Pennarun <apenwarr@tailscale.com>	5 years ago
Avery Pennarun	08acb502e5	Add tstest.PanicOnLog(), and fix various problems detected by this. ... If a test calls log.Printf, 'go test' horrifyingly rearranges the output to no longer be in chronological order, which makes debugging virtually impossible. Let's stop that from happening by making log.Printf panic if called from any module, no matter how deep, during tests. This required us to change the default error handler in at least one http.Server, as well as plumbing a bunch of logf functions around, especially in magicsock and wgengine, but also in logtail and backoff. To add insult to injury, 'go test' also rearranges the output when a parent test has multiple sub-tests (all the sub-test's t.Logf is always printed after all the parent tests t.Logf), so we need to screw around with a special Logf that can point at the "current" t (current_t.Logf) in some places. Probably our entire way of using subtests is wrong, since 'go test' would probably like to run them all in parallel if you called t.Parallel(), but it definitely can't because the're all manipulating the shared state created by the parent test. They should probably all be separate toplevel tests instead, with common setup/teardown logic. But that's a job for another time. Signed-off-by: Avery Pennarun <apenwarr@tailscale.com>	5 years ago
Dmytro Shynkevych	33b2f30cea	wgengine: wrap tun.Device to support filtering and packet injection (#358) ... Right now, filtering and packet injection in wgengine depend on a patch to wireguard-go that probably isn't suitable for upstreaming. This need not be the case: wireguard-go/tun.Device is an interface. For example, faketun.go implements it to mock a TUN device for testing. This patch implements the same interface to provide filtering and packet injection at the tunnel device level, at which point the wireguard-go patch should no longer be necessary. This patch has the following performance impact on i7-7500U @ 2.70GHz, tested in the following namespace configuration: ┌────────────────┐ ┌─────────────────────────────────┐ ┌────────────────┐ │ $ns1 │ │ $ns0 │ │ $ns2 │ │ client0 │ │ tailcontrol, logcatcher │ │ client1 │ │ ┌─────┐ │ │ ┌──────┐ ┌──────┐ │ │ ┌─────┐ │ │ │vethc│───────┼────┼──│vethrc│ │vethrs│──────┼─────┼──│veths│ │ │ ├─────┴─────┐ │ │ ├──────┴────┐ ├──────┴────┐ │ │ ├─────┴─────┐ │ │ │10.0.0.2/24│ │ │ │10.0.0.1/24│ │10.0.1.1/24│ │ │ │10.0.1.2/24│ │ │ └───────────┘ │ │ └───────────┘ └───────────┘ │ │ └───────────┘ │ └────────────────┘ └─────────────────────────────────┘ └────────────────┘ Before: --------------------------------------------------- | TCP send | UDP send | |------------------------|------------------------| | 557.0 (±8.5) Mbits/sec | 3.03 (±0.02) Gbits/sec | --------------------------------------------------- After: --------------------------------------------------- | TCP send | UDP send | |------------------------|------------------------| | 544.8 (±1.6) Mbits/sec | 3.13 (±0.02) Gbits/sec | --------------------------------------------------- The impact on receive performance is similar. Signed-off-by: Dmytro Shynkevych <dmytro@tailscale.com>	5 years ago
Brad Fitzpatrick	fefd7e10dc	types/structs: add structs.Incomparable annotation, use it where applicable ... Shotizam before and output queries: sqlite> select sum(size) from bin where func like 'type..%'; 129067 => 120216	5 years ago