tailscale

Commit Graph

Author	SHA1	Message	Date
Brad Fitzpatrick	f227083539	derp: add some guardrails for derpReason metrics getting out of sync The derp metrics got out of sync in `74eb99aed1` (2023-03). They were fixed in `0380cbc90d` (2024-05). This adds some further guardrails (atop the previous fix) to make sure they don't get out of sync again. Updates #12288 Change-Id: I809061a81f8ff92f45054d0253bc13871fc71634 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	6 months ago
Spike Curtis	0380cbc90d	derp: fix dropReason metrics labels (#12288 ) Updates #2745 Updates #7552 Signed-off-by: Spike Curtis <spike@coder.com>	6 months ago
Andrew Dunham	c6d42b1093	derp: remove stats goroutine, use a timer Without changing behaviour, don't create a goroutine per connection that sits and sleeps, but rather use a timer that wakes up and gathers statistics on a regular basis. Fixes #12127 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: Ibc486447e403070bdc3c2cd8ae340e7d02854f21	7 months ago
Maisem Ali	a49ed2e145	derp,ipn/ipnlocal: stop calling rand.Seed It's deprecated and using it gets us the old slow behavior according to https://go.dev/blog/randv2. > Having eliminated repeatability of the global output stream, Go 1.20 > was also able to make the global generator scale better in programs > that don’t call rand.Seed, replacing the Go 1 generator with a very > cheap per-thread wyrand generator already used inside the Go > runtime. This removed the global mutex and made the top-level > functions scale much better. Programs that do call rand.Seed fall > back to the mutex-protected Go 1 generator. Updates #7123 Change-Id: Ia5452e66bd16b5457d4b1c290a59294545e13291 Signed-off-by: Maisem Ali <maisem@tailscale.com>	7 months ago
Brad Fitzpatrick	10d130b845	cmd/derper, derp, tailcfg: add admission controller URL option So derpers can check an external URL for whether to permit access to a certain public key. Updates tailscale/corp#17693 Change-Id: I8594de58f54a08be3e2dbef8bcd1ff9b728ab297 Co-authored-by: Maisem Ali <maisem@tailscale.com> Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	9 months ago
Brad Fitzpatrick	2988c1ec52	derp: plumb context to Server.verifyClient Updates tailscale/corp#17693 Change-Id: If17e02c77d5ad86b820e639176da2d3e61296bae Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	9 months ago
James Tucker	ee20327496	derp: remove unused per-client struct field Updates #self Signed-off-by: James Tucker <james@tailscale.com>	11 months ago
James Tucker	a7f65b40c5	derp: optimize field order to reduce GC cost See the field alignment lints for more information. Reductions are 64->24 and 64->32 respectively. Updates #self Signed-off-by: James Tucker <james@tailscale.com>	11 months ago
James Tucker	ff9c1ebb4a	derp: reduce excess goroutines blocking on broadcasts Observed on one busy derp node, there were 600 goroutines blocked writing to this channel, which represents not only more blocked routines than we need, but also excess wake-ups downstream as the latent goroutines writes represent no new work. Updates #self Signed-off-by: James Tucker <james@tailscale.com>	11 months ago
Andrew Lytvynov	2716250ee8	all: cleanup unused code, part 2 (#10670 ) And enable U1000 check in staticcheck. Updates #cleanup Signed-off-by: Andrew Lytvynov <awly@tailscale.com>	11 months ago
Brad Fitzpatrick	6c791f7d60	derp: include src IPs in mesh watch messages Updates tailscale/corp#13945 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	1 year ago
Claire Wang	90a7d3066c	derp: use tstime (#8634 ) Updates #8587 Signed-off-by: Claire Wang <claire@tailscale.com>	1 year ago
valscale	5ae786988c	derp: remove default logging of disconnecting clients (#8163 ) ~97% of the log messages derper outputs are related to the normal non-error state of a client disconnecting in some manner. Add a verbose logging feature that only logs these messages when enabled. Fixes #8024 Signed-off-by: Val <valerie@tailscale.com>	2 years ago
valscale	74eb99aed1	derp, derphttp, magicsock: send new unknown peer frame when destination is unknown (#7552 ) * wgengine/magicsock: add envknob to send CallMeMaybe to non-existent peer For testing older client version responses to the PeerGone packet format change. Updates #4326 Signed-off-by: Val <valerie@tailscale.com> * derp: remove dead sclient struct member replaceLimiter Leftover from an previous solution to the duplicate client problem. Updates #2751 Signed-off-by: Val <valerie@tailscale.com> * derp, derp/derphttp, wgengine/magicsock: add new PeerGone message type Not Here Extend the PeerGone message type by adding a reason byte. Send a PeerGone "Not Here" message when an endpoint sends a disco message to a peer that this server has no record of. Fixes #4326 Signed-off-by: Val <valerie@tailscale.com> --------- Signed-off-by: Val <valerie@tailscale.com>	2 years ago
Anton Tolchanov	654b5a0616	derp: add optional debug logging for prober clients This allows tracking packet flow via logs for prober clients. Note that the new sclient.debug() function is called on every received packet, but will do nothing for most clients. I have adjusted sclient logging to print public keys in short format rather than full. This takes effect even for existing non-debug logging (mostly client disconnect messages). Example logs for a packet being sent from client [SbsJn] (connected to derper [dM2E3]) to client [10WOo] (connected to derper [AVxvv]): ``` derper [dM2E3]: derp client 10.0.0.1:35470[SbsJn]: register single client mesh("10.0.1.1"): 4 peers derp client 10.0.0.1:35470[SbsJn]: read frame type 4 len 40 err <nil> derp client 10.0.0.1:35470[SbsJn]: SendPacket for [10WOo], forwarding via <derphttp_client.Client [AVxvv] url=https://10.0.1.1/derp>: <nil> derp client 10.0.0.1:35470[SbsJn]: read frame type 0 len 0 err EOF derp client 10.0.0.1:35470[SbsJn]: read EOF derp client 10.0.0.1:35470[SbsJn]: sender failed: context canceled derp client 10.0.0.1:35470[SbsJn]: removing connection derper [AVxvv]: derp client 10.0.1.1:50650[10WOo]: register single client derp client 10.0.1.1:50650[10WOo]: received forwarded packet from [SbsJn] via [dM2E3] derp client 10.0.1.1:50650[10WOo]: sendPkt attempt 0 enqueued derp client 10.0.1.1:50650[10WOo]: sendPacket from [SbsJn]: <nil> derp client 10.0.1.1:50650[10WOo]: read frame type 0 len 0 err EOF derp client 10.0.1.1:50650[10WOo]: read EOF derp client 10.0.1.1:50650[10WOo]: sender failed: context canceled derp client 10.0.1.1:50650[10WOo]: removing connection ``` Signed-off-by: Anton Tolchanov <anton@tailscale.com>	2 years ago
David Anderson	8b2ae47c31	version: unexport all vars, turn Short/Long into funcs The other formerly exported values aren't used outside the package, so just unexport them. Signed-off-by: David Anderson <danderson@tailscale.com>	2 years ago
Will Norris	947c14793a	all: update tools that manage copyright headers Update all code generation tools, and those that check for license headers to use the new standard header. Also update copyright statement in LICENSE file. Fixes #6865 Signed-off-by: Will Norris <will@tailscale.com>	2 years ago
Will Norris	71029cea2d	all: update copyright and license headers This updates all source files to use a new standard header for copyright and license declaration. Notably, copyright no longer includes a date, and we now use the standard SPDX-License-Identifier header. This commit was done almost entirely mechanically with perl, and then some minimal manual fixes. Updates #6865 Signed-off-by: Will Norris <will@tailscale.com>	2 years ago
Anton Tolchanov	6cc6c70d70	derp: prevent concurrent access to multiForwarder map Instead of iterating over the map to determine the preferred forwarder on every packet (which could happen concurrently with map mutations), store it separately in an atomic variable. Fixes #6445 Signed-off-by: Anton Tolchanov <anton@tailscale.com>	2 years ago
Maisem Ali	1f4669a380	all: standardize on LocalAPI Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 years ago
Brad Fitzpatrick	f4ff26f577	types/pad32: delete package Use Go 1.19's new 64-bit alignment ~hidden feature instead. Fixes #5356 Change-Id: Ifcbcb115875a7da01df3bc29e9e7feadce5bc956 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Andrew Dunham	64ea60aaa3	derp: add TCP RTT metric on Linux (#5949 ) Periodically poll the TCP RTT metric from all open TCP connections and update a (bucketed) histogram metric. Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I6214902196b05bf7829c9d0ea501ce0e13d984cf	2 years ago
Eng Zer Jun	f0347e841f	refactor: move from io/ioutil to io and os packages The io/ioutil package has been deprecated as of Go 1.16 [1]. This commit replaces the existing io/ioutil functions with their new definitions in io and os packages. Reference: https://golang.org/doc/go1.16#ioutil Signed-off-by: Eng Zer Jun <engzerjun@gmail.com>	2 years ago
Brad Fitzpatrick	74674b110d	envknob: support changing envknobs post-init Updates #5114 Change-Id: Ia423fc7486e1b3f3180a26308278be0086fae49b Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	4950fe60bd	syncs, all: move to using Go's new atomic types instead of ours Fixes #5185 Change-Id: I850dd532559af78c3895e2924f8237ccc328449d Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	a12aad6b47	all: convert more code to use net/netip directly perl -i -npe 's,netaddr.IPPrefixFrom,netip.PrefixFrom,' $(git grep -l -F netaddr.) perl -i -npe 's,netaddr.IPPortFrom,netip.AddrPortFrom,' $(git grep -l -F netaddr. ) perl -i -npe 's,netaddr.IPPrefix,netip.Prefix,g' $(git grep -l -F netaddr. ) perl -i -npe 's,netaddr.IPPort,netip.AddrPort,g' $(git grep -l -F netaddr. ) perl -i -npe 's,netaddr.IP\b,netip.Addr,g' $(git grep -l -F netaddr. ) perl -i -npe 's,netaddr.IPv6Raw\b,netip.AddrFrom16,g' $(git grep -l -F netaddr. ) goimports -w . Then delete some stuff from the net/netaddr shim package which is no longer neeed. Updates #5162 Change-Id: Ia7a86893fe21c7e3ee1ec823e8aba288d4566cd8 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	6a396731eb	all: use various net/netip parse funcs directly Mechanical change with perl+goimports. Changed {Must,}Parse{IP,IPPrefix,IPPort} to their netip variants, then goimports -d . Finally, removed the net/netaddr wrappers, to prevent future use. Updates #5162 Change-Id: I59c0e38b5fbca5a935d701645789cddf3d7863ad Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	7eaf5e509f	net/netaddr: start migrating to net/netip via new netaddr adapter package Updates #5162 Change-Id: Id7bdec303b25471f69d542f8ce43805328d56c12 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Charlotte Brandhorst-Satzkorn	4c0feba38e	derp: plumb '/derp' request context through (#5083 ) This change is required to implement tracing for derp. Signed-off-by: Charlotte Brandhorst-Satzkorn <charlotte@tailscale.com>	2 years ago
Maisem Ali	9f604f2bd3	derp: add (*Server).IsClientConnectedForTest func. (#4331 ) This allows tests to verfiy that a DERP connection was actually established. Related to #4326 Updates tailscale/corp#2579 Signed-off-by: Maisem Ali <maisem@tailscale.com>	3 years ago
Brad Fitzpatrick	18818763d1	derp: set Basic Constraints on metacert See https://github.com/golang/go/issues/51759#issuecomment-1071147836 Once we deploy this, tailscaled should work again for macOS users with Go 1.18. Updates golang/go#51759 Change-Id: I869b6ddc556a2de885e96ccf9f335dfc8f6f6a7e Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Josh Bleecher Snyder	0868329936	all: use any instead of interface{} My favorite part of generics. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Brad Fitzpatrick	41fd4eab5c	envknob: add new package for all the strconv.ParseBool(os.Getenv(..)) A new package can also later record/report which knobs are checked and set. It also makes the code cleaner & easier to grep for env knobs. Change-Id: Id8a123ab7539f1fadbd27e0cbeac79c2e4f09751 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	2aeb93003f	derp: add metrics to server got pings, sent pongs Updates #3652 Change-Id: I1d350bcaee39ea36b0c71912028624d18fb541b4 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	63d9c7b9b3	derp: add Client.LocalAddr method So magicsock can later ask a DERP connection whether its source IP would've changed if it reconnected. Updates #3619 Change-Id: Ibc8810340c511d6786b60c78c1a61c09f5800e40 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	434af15a04	derp: support client->server ping (and server->client pong) In prep for a future change to have client ping derp connections when their state is questionable, rather than aggressively tearing them down and doing a heavy reconnect when their state is unknown. We already support ping/pong in the other direction (servers probing clients) so we already had the two frame types, but I'd never finished this direction. Updates #3619 Change-Id: I024b815d9db1bc57c20f82f80f95fb55fc9e2fcc Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
David Anderson	84c3a09a8d	types/key: export constants for key size, not a method. Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Anderson	c1d009b9e9	ipn/ipnstate: use key.NodePublic instead of the generic key.Public. Updates #3206. Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Anderson	1f06f77dcb	derp: remove package shadowing of types/key. Updates #3206 Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Anderson	37c150aee1	derp: use new node key type. Update #3206 Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
Brad Fitzpatrick	73f177e4d5	derp: throttle client sends if server advertises rate limits Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	fc160f80ee	metrics: move currentFDs code to the metrics package Updates #2784 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	73280595a8	derp: accept dup clients without closing prior's connection A public key should only have max one connection to a given DERP node (or really: one connection to a node in a region). But if people clone their machine keys (e.g. clone their VM, Raspbery Pi SD card, etc), then we can get into a situation where a public key is connected multiple times. Originally, the DERP server handled this by just kicking out a prior connections whenever a new one came. But this led to reconnect fights where 2+ nodes were in hard loops trying to reconnect and kicking out their peer. Then `a909d37a59` tried to add rate limiting to how often that dup-kicking can happen, but empirically it just doesn't work and ~leaks a bunch of goroutines and TCP connections, tying them up for hour+ while more and more accumulate and waste memory. Mostly because we were doing a time.Sleep forever while not reading from their TCP connections. Instead, just accept multiple connections per public key but track which is the most recent. And if two both are writing back & forth, then optionally disable them both. That last part is only enabled in tests for now. The current default policy is just last-sender-wins while we gather the next round of stats. Updates #2751 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	ffd22050c0	derp: export current file descriptor metric	3 years ago
slowy07	ac0353e982	fix: typo spelling grammar Signed-off-by: slowy07 <slowy.arfy@gmail.com>	3 years ago
Brad Fitzpatrick	f35b8c3ead	derp: fix meshing accounting edge case bug If a peer is connected to multiple nodes in a region (so multiForwarder is in use) and then a node restarts and re-sends all its additions, this bug about whether an element is in the multiForwarder could cause a one-time flip in the which peer node we forward to. Note a huge deal, but not written as intended. Thanks to @lewgun for the bug report in #2141. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	fd7b738e5b	derp: use pad32 package for padding, reduce duplication Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	7298e777d4	derp: reduce server memory by 30% by removing persistent bufio.Writer Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	b622c60ed0	derp,wgengine/magicsock: don't assume stringer is in $PATH for go:generate Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	a909d37a59	derp: rate limit how often same-key clients can kick each other off server Updates #392 Updates #506 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago

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129 Commits (36d0ac6f8e7ecb1f4991f97c06d3d519a481cf42)