254 Commits (66480755c248d557fd25e3485bf0c09b6b962c77)

Author	SHA1	Message	Date
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>	3 years ago
Brad Fitzpatrick	c445e3d327	wgengine/magicsock: fix typo in comment	3 years ago
Brad Fitzpatrick	a6d098c750	wgengine/magicsock: log when DERP connection succeeds ... Updates #1310	3 years ago
Brad Fitzpatrick	829eb8363a	net/interfaces: sort returned addresses from LocalAddresses ... Also change the type to netaddr.IP while here, because it made sorting easier. Updates tailscale/corp#1397 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	c3e5903b91	wgengine/magicsock: remove leftover portmapper debug logging ... It's already logged at the right time in logEndpointChange. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	ea3715e3ce	wgengine/magicsock: remove TODO about endpoints-over-DERP ... It was done in Tailscale 1.4 with CallMeMaybe disco messages containing endpoints. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	e9e4f1063d	wgengine/magicsock: fix discoEndpoint caching bug when a node key changes ... Fixes #1391 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	c64bd587ae	net/portmapper: add NAT-PMP client, move port mapping service probing ... * move probing out of netcheck into new net/portmapper package * use PCP ANNOUNCE op codes for PCP discovery, rather than causing short-lived (sub-second) side effects with a 1-second-expiring map + delete. * track when we heard things from the router so we can be less wasteful in querying the router's port mapping services in the future * use portmapper from magicsock to map a public port Fixes #1298 Fixes #1080 Fixes #1001 Updates #864 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Josh Bleecher Snyder	1632f9fd6b	wgengine/magicsock: reduce log spam during tests ... Only do the type assertion to *net.UDPAddr when addr is non-nil. This prevents a bunch of log spam during tests.	3 years ago
Josh Bleecher Snyder	88586ec4a4	wgengine/magicsock: remove an alloc from ReceiveIPvN ... We modified the standard net package to not allocate a *net.UDPAddr during a call to (*net.UDPConn).ReadFromUDP if the caller's use of the *net.UDPAddr does not cause it to escape. That is https://golang.org/cl/291390. This is the companion change to magicsock. There are two changes required. First, call ReadFromUDP instead of ReadFrom, if possible. ReadFrom returns a net.Addr, which is an interface, which always allocates. Second, reduce the lifetime of the returned *net.UDPAddr. We do this by immediately converting it into a netaddr.IPPort. We left the existing RebindingUDPConn.ReadFrom method in place, as it is required to satisfy the net.PacketConn interface. With the upstream change and both of these fixes in place, we have removed one large allocation per packet received. name old time/op new time/op delta ReceiveFrom-8 16.7µs ± 5% 16.4µs ± 8% ~ (p=0.310 n=5+5) name old alloc/op new alloc/op delta ReceiveFrom-8 112B ± 0% 64B ± 0% -42.86% (p=0.008 n=5+5) name old allocs/op new allocs/op delta ReceiveFrom-8 3.00 ± 0% 2.00 ± 0% -33.33% (p=0.008 n=5+5) Co-authored-by: Sonia Appasamy <sonia@tailscale.com> Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Josh Bleecher Snyder	0c673c1344	wgengine/magicsock: unify on netaddr types in addrSet ... addrSet maintained duplicate lists of netaddr.IPPorts and net.UDPAddrs. Unify to use the netaddr type only. This makes (*Conn).ReceiveIPvN a bit uglier, but that'll be cleaned up in a subsequent commit. This is preparatory work to remove an allocation from ReceiveIPv4. Co-authored-by: Sonia Appasamy <sonia@tailscale.com> Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Brad Fitzpatrick	7e201806b1	wgengine/magicsock: reconnect to DERP home after network comes back up ... Updates #1310	3 years ago
Brad Fitzpatrick	9b4e50cec0	wgengine/magicsock: fix typo in comment	3 years ago
Brad Fitzpatrick	6b365b0239	wgengine/magicsock: fix DERP reader hang regression during concurrent reads ... Fixes #1282 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	6d2b8df06d	wgengine/magicsock: add disabled failing (deadlocking) test for #1282 ... The fix can make this test run unconditionally. This moves code from 5c619882bc for testability but doesn't fix it yet. The #1282 problem remains (when I wrote its wake-up mechanism, I forgot there were N DERP readers funneling into 1 UDP reader, and the code just isn't correct at all for that case). Also factor out some test helper code from BenchmarkReceiveFrom. The refactoring in magicsock.go for testability should have no behavior change.	3 years ago
Brad Fitzpatrick	1e7a35b225	types/netmap: split controlclient.NetworkMap off into its own leaf package ... Updates #1278 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	6064b6ff47	wgengine/wgcfg/nmcfg: split control/controlclient/netmap.go into own package ... It couldn't move to ipnlocal due to test dependency cycles. Updates #1278 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	f7eed25bb9	wgengine/magicsock: filter disco packets and packets when stopped from wireguard ... Fixes #1167 Fixes tailscale/corp#219 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Josh Bleecher Snyder	dd10babaed	wgenginer/magicsock: remove Addrs methods ... They are now unused. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Brad Fitzpatrick	9541886856	wgengine/magicsock: disable regular STUNs for all platforms by default ... Reduces background CPU & network. Updates #1034 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	c55d26967b	wgengine/magicsock: log more details of endpoints learned over disco ... Also, don't try to use IPv6 LinkLocalUnicast addresses for now. Like endpoints exchanged with control, we share them but don't yet use them. Updates #1172	3 years ago
Brad Fitzpatrick	359055d3fa	wgengine/magicsock: fix logging regression ... c8c493f3d9 made it always say `created=false` which scared me when I saw it, as that would've implied things were broken much worse. Fortunately the logging was just wrong.	3 years ago
Brad Fitzpatrick	edf64e0901	wgengine/magicsock: send, use endpoints in CallMeMaybe messages ... Fixes #1172 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	b5b4992eff	disco: support parsing/encoding endpoints in call-me-maybe frames ... Updates #1172 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	187e22a756	wgengine/magicsock: don't run the DERP cleanup so often ... To save CPU and wakeups, don't run the DERP cleanup timer regularly unless there is a non-home DERP connection open. Also eliminates the goroutine, moving to a time.AfterFunc. Updates #1034 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Josh Bleecher Snyder	5fe5402fcd	Revert "wgengine/magicsock: shortcircuit discoEndpoint.heartbeat when its connection is closed" ... This reverts commit 08baa17d9a. It caused deadlocks due to lock ordering violations. It was not the right fix, and thus should simply be reverted while we look for the right fix (if we haven't already found it in the interim; we've fixed other logging-after-test issues). Fixes #1161	3 years ago
Brad Fitzpatrick	edce91a8a6	wgengine/magicsock: fix a naked return bug/crash where we returned (nil, true) ... The 'ok' from 'ipp, ok :=' above was the result parameter ok. Whoops.	3 years ago
Brad Fitzpatrick	51bd1feae4	wgengine/magicsock: add single element IPPort->endpoint cache in receive path ... name old time/op new time/op delta ReceiveFrom-4 21.8µs ± 2% 20.9µs ± 2% -4.27% (p=0.000 n=10+10) Updates #414 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	5c619882bc	wgengine/magicsock: simplify ReceiveIPv4+DERP path ... name old time/op new time/op delta ReceiveFrom-4 35.8µs ± 3% 21.9µs ± 5% -38.92% (p=0.008 n=5+5) Fixes #1145 Updates #414 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	3fa86a8b23	wgengine/magicsock: use relatively new netaddr.IPPort.IsZero method	3 years ago
Brad Fitzpatrick	4811236189	wgengine/magicsock: speed up BenchmarkReceiveFrom, store context.Done chan ... context.cancelCtx.Done involves a mutex and isn't as cheap as I previously assumed. Convert the donec method into a struct field and store the channel value once. Our one magicsock.Conn gets one pointer larger, but it cuts ~1% of the CPU time of the ReceiveFrom benchmark and removes a bubble from the --svg output :)	3 years ago
Josh Bleecher Snyder	63af950d8c	wgengine/magicsock: adapt to wireguard-go without UpdateDst ... 22507adf54 stopped relying on our fork of wireguard-go's UpdateDst callback. As a result, we can unwind that code, and the extra return value of ReceiveIPv{4,6}. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
David Anderson	57d95dd005	wgengine/magicsock: default legacy networking to off for some tests. ... Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Anderson	a2463e8948	wgengine/magicsock: add an option to disable legacy peer handling. ... Used in tests to ensure we're not relying on behavior we're going to remove eventually. Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Anderson	d456bfdc6d	wgengine/magicsock: fix BenchmarkReceiveFrom. ... Previously, this benchmark relied on behavior of the legacy receive codepath, which I changed in 22507adf. With this change, the benchmark instead relies on the new active discovery path. Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
Josh Bleecher Snyder	08baa17d9a	wgengine/magicsock: shortcircuit discoEndpoint.heartbeat when its connection is closed ... This prevents us from continuing to do unnecessary work (including logging) after the connection has closed. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Josh Bleecher Snyder	7c76435bf7	wgengine/magicsock: simplify ... Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Josh Bleecher Snyder	654b5f1570	all: convert from []wgcfg.Endpoint to string ... This eliminates a dependency on wgcfg.Endpoint, as part of the effort to eliminate our wireguard-go fork. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
David Anderson	22507adf54	wgengine/magicsock: stop depending on UpdateDst in legacy codepaths. ... This makes connectivity between ancient and new tailscale nodes slightly worse in some cases, but only in cases where the ancient version would likely have failed to get connectivity anyway. Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
Denton Gentry	0aa55bffce	magicsock: test error case in derpWriteChanOfAddr ... In derpWriteChanOfAddr when we call derphttp.NewRegionClient(), there is a check of whether the connection is already errored and if so it returns before grabbing the lock. The lock might already be held and would be a deadlock. This corner case is not being reliably exercised by other tests. This shows up in code coverage reports, the lines of code in derpWriteChanOfAddr are alternately added and subtracted from code coverage. Add a test to specifically exercise this code path, and verify that it doesn't deadlock. This is the best tradeoff I could come up with: + the moment code calls Err() to check if there is an error, we grab the lock to make sure it would deadlock if it tries to grab the lock itself. + if a new call to Err() is added in this code path, only the first one will be covered and the rest will not be tested. + this test doesn't verify whether code is checking for Err() in the right place, which ideally I guess it would. Signed-off-by: Denton Gentry <dgentry@tailscale.com>	3 years ago
Brad Fitzpatrick	85e54af0d7	wgengine: on TCP connect fail/timeout, log some clues about why it failed ... So users can see why things aren't working. A start. More diagnostics coming. Updates #1094	3 years ago
Brad Fitzpatrick	f85769b1ed	wgengine/magicsock: drop netaddr.IPPort cache ... netaddr.IP no longer allocates, so don't need a cache or all its associated code/complexity. This totally removes groupcache/lru from the deps. Also go mod tidy.	3 years ago
Brad Fitzpatrick	5aa5db89d6	cmd/tailscaled, wgengine/netstack: add start of gvisor userspace netstack work ... Not usefully functional yet (mostly a proof of concept), but getting it submitted for some work @namansood is going to do atop this. Updates #707 Updates #634 Updates #48 Updates #835	3 years ago
Brad Fitzpatrick	5efb0a8bca	cmd/tailscale: change formatting of "tailscale status" ... * show DNS name over hostname, removing domain's common MagicDNS suffix. only show hostname if there's no DNS name. but still show shared devices' MagicDNS FQDN. * remove nerdy low-level details by default: endpoints, DERP relay, public key. They're available in JSON mode still for those who need them. * only show endpoint or DERP relay when it's active with the goal of making debugging easier. (so it's easier for users to understand what's happening) The asterisks are gone. * remove Tx/Rx numbers by default for idle peers; only show them when there's traffic. * include peers' owner login names * add CLI option to not show peers (matching --self=true, --peers= also defaults to true) * sort by DNS/host name, not public key * reorder columns	3 years ago
Brad Fitzpatrick	b5b9866ba2	wgengine/magicsock: copy self DNS name to PeerStatus, re-fill OS ... The OS used to be sent back from the server but that has since been removed as being redundant.	3 years ago
David Anderson	86fe22a1b1	Update netaddr, and adjust wgengine/magicsock due to API change. ... Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
Josh Bleecher Snyder	56a7652dc9	wgkey: new package ... This is a replacement for the key-related parts of the wireguard-go wgcfg package. This is almost a straight copy/paste from the wgcfg package. I have slightly changed some of the exported functions and types to avoid stutter, added and tweaked some comments, and removed some now-unused code. To avoid having wireguard-go depend on this new package, wgcfg will keep its key types. We translate into and out of those types at the last minute. These few remaining uses will be eliminated alongside the rest of the wgcfg package. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Josh Bleecher Snyder	2fe770ed72	all: replace wgcfg.IP and wgcfg.CIDR with netaddr types ... Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Brad Fitzpatrick	053a1d1340	all: annotate log verbosity levels on most egregiously spammy log prints ... Fixes #924 Fixes #282 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
David Anderson	294ceb513c	ipn, wgengine/magicsock: fix `tailscale status` display. ... Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago