tailscale

Commit Graph

Author	SHA1	Message	Date
Andrew Dunham	93cd2ab224	util/singleflight: add DoChanContext This is a variant of DoChan that supports context propagation, such that the context provided to the inner function will only be canceled when there are no more waiters for a given key. This can be used to deduplicate expensive and cancelable calls among multiple callers safely. Updates #11935 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: Ibe1fb67442a854babbc6924fd8437b02cc9e7bcf	6 months ago
Aaron Klotz	df86576989	util/winutil: add AllocateContiguousBuffer and SetNTString helper funcs AllocateContiguousBuffer is for allocating structs with trailing buffers containing additional data. It is to be used for various Windows structures containing pointers to data located immediately after the struct. SetNTString performs in-place setting of windows.NTString and windows.NTUnicodeString. Updates #12383 Signed-off-by: Aaron Klotz <aaron@tailscale.com>	6 months ago
Aaron Klotz	34e8820301	util/winutil: add conpty package and helper for building windows.StartupInfoEx StartupInfoBuilder is a helper for constructing StartupInfoEx structures featuring proc/thread attribute lists. Calling its setters triggers the appropriate setting of fields, adjusting flags as necessary, and populating the proc/thread attribute list as necessary. Currently it supports four features: setting std handles, setting pseudo-consoles, specifying handles for inheritance, and specifying jobs. The conpty package simplifies creation of pseudo-consoles, their associated pipes, and assignment of the pty to StartupInfoEx proc/thread attributes. Updates #12383 Signed-off-by: Aaron Klotz <aaron@tailscale.com>	6 months ago
Maisem Ali	36e8e8cd64	wgengine/magicsock: use math/rands/v2 Updates #11058 Co-authored-by: James Tucker <james@tailscale.com> Signed-off-by: Maisem Ali <maisem@tailscale.com>	6 months ago
Maisem Ali	4a8cb1d9f3	all: use math/rand/v2 more Updates #11058 Signed-off-by: Maisem Ali <maisem@tailscale.com>	6 months ago
Brad Fitzpatrick	909a292a8d	util/linuxfw: don't try cleaning iptables on gokrazy It just generates log spam. Updates #12277 Change-Id: I5f65c0859e86de0a5349f9d26c9805e7c26b9371 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	6 months ago
Andrew Dunham	8e4a29433f	util/pool: add package for storing and using a pool of items This can be used to implement a persistent pool (i.e. one that isn't cleared like sync.Pool is) of items–e.g. database connections. Some benchmarks vs. a naive implementation that uses a single map iteration show a pretty meaningful improvement: $ benchstat -col /impl ./bench.txt goos: darwin goarch: arm64 pkg: tailscale.com/util/pool │ Pool │ map │ │ sec/op │ sec/op vs base │ Pool_AddDelete-10 10.56n ± 2% 15.11n ± 1% +42.97% (p=0.000 n=10) Pool_TakeRandom-10 56.75n ± 4% 1899.50n ± 20% +3246.84% (p=0.000 n=10) geomean 24.49n 169.4n +591.74% Updates tailscale/corp#19900 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: Ie509cb65573c4726cfc3da9a97093e61c216ca18	6 months ago
Maisem Ali	9a64c06a20	all: do not depend on the testing package Discovered while looking for something else. Updates tailscale/corp#18935 Signed-off-by: Maisem Ali <maisem@tailscale.com>	6 months ago
Andrew Dunham	47b3476eb7	util/lru: add Clear method Updates tailscale/corp#20109 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I751a669251a70f0134dd1540c19b274a97608a93	6 months ago
Irbe Krumina	7ef2f72135	util/linuxfw: fix IPv6 availability check for nftables (#12009 ) * util/linuxfw: fix IPv6 NAT availability check for nftables When running firewall in nftables mode, there is no need for a separate NAT availability check (unlike with iptables, there are no hosts that support nftables, but not IPv6 NAT - see tailscale/tailscale#11353). This change fixes a firewall NAT availability check that was using the no-longer set ipv6NATAvailable field by removing the field and using a method that, for nftables, just checks that IPv6 is available. Updates tailscale/tailscale#12008 Signed-off-by: Irbe Krumina <irbe@tailscale.com>	6 months ago
Andrew Dunham	25e32cc3ae	util/linuxfw: fix table name in DelStatefulRule Updates #12061 Follow-up to #12072 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I2ba8c4bff14d93816760ff5eaa1a16f17bad13c1	7 months ago
Anton Tolchanov	ac638f32c0	util/linuxfw: fix stateful packet filtering in nftables mode To match iptables: `b5dbf155b1/util/linuxfw/iptables_runner.go (L536)` Updates #12066 Signed-off-by: Anton Tolchanov <anton@tailscale.com>	7 months ago
Andrew Lytvynov	c28f5767bf	various: implement stateful firewalling on Linux (#12025 ) Updates https://github.com/tailscale/corp/issues/19623 Change-Id: I7980e1fb736e234e66fa000d488066466c96ec85 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Co-authored-by: Andrew Dunham <andrew@du.nham.ca>	7 months ago
Claire Wang	41f2195899	util/syspolicy: add auto exit node related keys (#11996 ) Updates tailscale/corp#19681 Signed-off-by: Claire Wang <claire@tailscale.com>	7 months ago
Brad Fitzpatrick	1a963342c7	util/set: add Of variant of SetOf that takes variadic parameter set.Of(1, 2, 3) is prettier than set.SetOf([]int{1, 2, 3}). I was going to change the signature of SetOf but then I noticed its name has stutter anyway, so I kept it for compatibility. People can prefer to use set.Of for new code or slowly migrate. Also add a lazy Make method, which I often find myself wanting, without having to resort to uglier mak.Set(&set, k, struct{}{}). Updates #cleanup Change-Id: Ic6f3870115334efcbd65e79c437de2ad3edb7625 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	7 months ago
Brad Fitzpatrick	7455e027e9	util/slicesx: add AppendMatching We had this in a different repo, but moving it here, as this a more fitting package. Updates #cleanup Change-Id: I5fb9b10e465932aeef5841c67deba4d77d473d57 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	7 months ago
Andrea Gottardo	1d3e77f373	util/syspolicy: add ReadStringArray interface (#11857 ) Fixes tailscale/corp#19459 This PR adds the ability for users of the syspolicy handler to read string arrays from the MDM solution configured on the system. Signed-off-by: Andrea Gottardo <andrea@gottardo.me>	7 months ago
Irbe Krumina	add62af7c6	util/linuxfw,go.{mod,sum}: don't log errors when deleting non-existant chains and rules (#11852 ) This PR bumps iptables to a newer version that has a function to detect 'NotExists' errors and uses that function to determine whether errors received on iptables rule and chain clean up are because the rule/chain does not exist- if so don't log the error. Updates corp#19336 Signed-off-by: Irbe Krumina <irbe@tailscale.com>	7 months ago
Irbe Krumina	3af0f526b8	cmd{containerboot,k8s-operator},util/linuxfw: support ExternalName Services (#11802 ) * cmd/containerboot,util/linuxfw: support proxy backends specified by DNS name Adds support for optionally configuring containerboot to proxy traffic to backends configured by passing TS_EXPERIMENTAL_DEST_DNS_NAME env var to containerboot. Containerboot will periodically (every 10 minutes) attempt to resolve the DNS name and ensure that all traffic sent to the node's tailnet IP gets forwarded to the resolved backend IP addresses. Currently: - if the firewall mode is iptables, traffic will be load balanced accross the backend IP addresses using round robin. There are no health checks for whether the IPs are reachable. - if the firewall mode is nftables traffic will only be forwarded to the first IP address in the list. This is to be improved. * cmd/k8s-operator: support ExternalName Services Adds support for exposing endpoints, accessible from within a cluster to the tailnet via DNS names using ExternalName Services. This can be done by annotating the ExternalName Service with tailscale.com/expose: "true" annotation. The operator will deploy a proxy configured to route tailnet traffic to the backend IPs that service.spec.externalName resolves to. The backend IPs must be reachable from the operator's namespace. Updates tailscale/tailscale#10606 Signed-off-by: Irbe Krumina <irbe@tailscale.com>	7 months ago
Percy Wegmann	b7e5122226	util/osuser: add unit test for parseGroupIds Updates #11682 Signed-off-by: Percy Wegmann <percy@tailscale.com>	7 months ago
Andrew Dunham	e985c6e58f	ssh/tailssh: try fetching group IDs for user with the 'id' command Since the tailscaled binaries that we distribute are static and don't link cgo, we previously wouldn't fetch group IDs that are returned via NSS. Try shelling out to the 'id' command, similar to how we call 'getent', to detect such cases. Updates #11682 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I9bdc938bd76c71bc130d44a97cc2233064d64799	7 months ago
Joe Tsai	63b3c82587	ipn/local: log OS-specific diagnostic information as JSON (#11700 ) There is an undocumented 16KiB limit for text log messages. However, the limit for JSON messages is 256KiB. Even worse, logging JSON as text results in significant overhead since each double quote needs to be escaped. Instead, use logger.Logf.JSON to explicitly log the info as JSON. We also modify osdiag to return the information as structured data rather than implicitly have the package log on our behalf. This gives more control to the caller on how to log. Updates #7802 Signed-off-by: Joe Tsai <joetsai@digital-static.net>	7 months ago
Brad Fitzpatrick	7c1d6e35a5	all: use Go 1.22 range-over-int Updates #11058 Change-Id: I35e7ef9b90e83cac04ca93fd964ad00ed5b48430 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	7 months ago
Brad Fitzpatrick	271cfdb3d3	util/syspolicy: clean up doc grammar and consistency Updates #cleanup Change-Id: I912574cbd5ef4d8b7417b8b2a9b9a2ccfef88840 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	7 months ago
James Tucker	d0f3fa7d7e	util/fastuuid: add a more efficient uuid generator This still generates github.com/google/uuid UUID objects, but does so using a ChaCha8 CSPRNG from the stdlib rand/v2 package. The public API is backed by a sync.Pool to provide good performance in highly concurrent operation. Under high load the read API produces a lot of extra garbage and overhead by way of temporaries and syscalls. This implementation reduces both to minimal levels, and avoids any long held global lock by utilizing sync.Pool. Updates tailscale/corp#18266 Updates tailscale/corp#19054 Signed-off-by: James Tucker <james@tailscale.com>	8 months ago
James Tucker	db760d0bac	cmd/tailscaled: move cleanup to an implicit action during startup This removes a potentially increased boot delay for certain boot topologies where they block on ExecStartPre that may have socket activation dependencies on other system services (such as systemd-resolved and NetworkManager). Also rename cleanup to clean up in affected/immediately nearby places per code review commentary. Fixes #11599 Signed-off-by: James Tucker <james@tailscale.com>	8 months ago
Nick Khyl	8d83adde07	util/winutil/winenv: add package for current Windows environment details Package winenv provides information about the current Windows environment. This includes details such as whether the device is a server or workstation, and if it is AD domain-joined, MDM-registered, or neither. Updates tailscale/corp#18342 Signed-off-by: Nick Khyl <nickk@tailscale.com>	8 months ago
Irbe Krumina	1fbaf26106	util/linuxfw: fix chain comparison (#11639 ) Don't compare pointer fields by pointer value, but by the actual value Updates#cleanup Signed-off-by: Irbe Krumina <irbe@tailscale.com>	8 months ago
Joe Tsai	4bbac72868	util/truncate: support []byte as well (#11614 ) There are no mutations to the input, so we can support both ~string and ~[]byte just fine. Updates #cleanup Signed-off-by: Joe Tsai <joetsai@digital-static.net>	8 months ago
Joe Tsai	1a38d2a3b4	util/zstdframe: support specifying a MaxWindowSize (#11595 ) Specifying a smaller window size during compression provides a knob to tweak the tradeoff between memory usage and the compression ratio. Updates tailscale/corp#18514 Signed-off-by: Joe Tsai <joetsai@digital-static.net>	8 months ago
Irbe Krumina	92ca770b8d	util/linuxfw: fix MSS clamping in nftables mode (#11588 ) MSS clamping for nftables was mostly not ran due to to an earlier rule in the FORWARD chain issuing accept verdict. This commit places the clamping rule into a chain of its own to ensure that it gets ran. Updates tailscale/tailscale#11002 Signed-off-by: Irbe Krumina <irbe@tailscale.com>	8 months ago
Irbe Krumina	5fb721d4ad	util/linuxfw,wgengine/router: skip IPv6 firewall configuration in partial iptables mode (#11546 ) We have hosts that support IPv6, but not IPv6 firewall configuration in iptables mode. We also have hosts that have some support for IPv6 firewall configuration in iptables mode, but do not have iptables filter table. We should: - configure ip rules for all hosts that support IPv6 - only configure firewall rules in iptables mode if the host has iptables filter table. Updates tailscale/tailscale#11540 Signed-off-by: Irbe Krumina <irbe@tailscale.com>	8 months ago
Percy Wegmann	bed818a978	ipn/localapi: add support for multipart POST to file-put This allows sending multiple files via Taildrop in one request. Progress is tracked via ipn.Notify. Updates tailscale/corp#18202 Signed-off-by: Percy Wegmann <percy@tailscale.com>	8 months ago
James Tucker	3f7313dbdb	util/linuxfw,wgengine/router: enable IPv6 configuration when netfilter is disabled Updates #11434 Signed-off-by: James Tucker <james@tailscale.com>	8 months ago
Joe Tsai	d4bfe34ba7	util/zstdframe: add package for stateless zstd compression (#11481 ) The Go zstd package is not friendly for stateless zstd compression. Passing around multiple zstd.Encoder just for stateless compression is a waste of memory since the memory is never freed and seldom used if no compression operations are happening. For performance, we pool the relevant Encoder/Decoder with the specific options set. Functionally, this package is a wrapper over the Go zstd package with a more ergonomic API for stateless operations. This package can be used to cleanup various pre-existing zstd.Encoder pools or one-off handlers spread throughout our codebases. Performance: BenchmarkEncode/Best 1690 610926 ns/op 25.78 MB/s 1 B/op 0 allocs/op zstd_test.go:137: memory: 50.336 MiB zstd_test.go:138: ratio: 3.269x BenchmarkEncode/Better 10000 100939 ns/op 156.04 MB/s 0 B/op 0 allocs/op zstd_test.go:137: memory: 20.399 MiB zstd_test.go:138: ratio: 3.131x BenchmarkEncode/Default 15775 74976 ns/op 210.08 MB/s 105 B/op 0 allocs/op zstd_test.go:137: memory: 1.586 MiB zstd_test.go:138: ratio: 3.064x BenchmarkEncode/Fastest 23222 53977 ns/op 291.81 MB/s 26 B/op 0 allocs/op zstd_test.go:137: memory: 599.458 KiB zstd_test.go:138: ratio: 2.898x BenchmarkEncode/FastestLowMemory 23361 50789 ns/op 310.13 MB/s 15 B/op 0 allocs/op zstd_test.go:137: memory: 334.458 KiB zstd_test.go:138: ratio: 2.898x BenchmarkEncode/FastestNoChecksum 23086 50253 ns/op 313.44 MB/s 26 B/op 0 allocs/op zstd_test.go:137: memory: 599.458 KiB zstd_test.go:138: ratio: 2.900x BenchmarkDecode/Checksum 70794 17082 ns/op 300.96 MB/s 4 B/op 0 allocs/op zstd_test.go:163: memory: 316.438 KiB BenchmarkDecode/NoChecksum 74935 15990 ns/op 321.51 MB/s 4 B/op 0 allocs/op zstd_test.go:163: memory: 316.438 KiB BenchmarkDecode/LowMemory 71043 16739 ns/op 307.13 MB/s 0 B/op 0 allocs/op zstd_test.go:163: memory: 79.347 KiB We can see that the options are taking effect where compression ratio improves with higher levels and compression speed diminishes. We can also see that LowMemory takes effect where the pooled coder object references less memory than other cases. We can see that the pooling is taking effect as there are 0 amortized allocations. Additional performance: BenchmarkEncodeParallel/zstd-24 1857 619264 ns/op 1796 B/op 49 allocs/op BenchmarkEncodeParallel/zstdframe-24 1954 532023 ns/op 4293 B/op 49 allocs/op BenchmarkDecodeParallel/zstd-24 5288 197281 ns/op 2516 B/op 49 allocs/op BenchmarkDecodeParallel/zstdframe-24 6441 196254 ns/op 2513 B/op 49 allocs/op In concurrent usage, handling the pooling in this package has a marginal benefit over the zstd package, which relies on a Go channel as the pooling mechanism. In particular, coders can be freed by the GC when not in use. Coders can be shared throughout the program if they use this package instead of multiple independent pools doing the same thing. The allocations are unrelated to pooling as they're caused by the spawning of goroutines. Updates #cleanup Updates tailscale/corp#18514 Updates tailscale/corp#17653 Updates tailscale/corp#18005 Signed-off-by: Joe Tsai <joetsai@digital-static.net>	8 months ago
Brad Fitzpatrick	5d1c72f76b	wgengine/magicsock: don't use endpoint debug ringbuffer on mobile. Save some memory. Updates tailscale/corp#18514 Change-Id: Ibcaf3c6d8e5cc275c81f04141d0f176e2249509b Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	8 months ago
Andrew Dunham	512fc0b502	util/reload: add new package to handle periodic value loading This can be used to reload a value periodically, whether from disk or another source, while handling jitter and graceful shutdown. Updates tailscale/corp#1297 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: Iee2b4385c9abae59805f642a7308837877cb5b3f	8 months ago
James Tucker	055117ad45	util/linuxfw: fix support for containers without IPv6 iptables filters (#11381 ) There are container environments such as GitHub codespaces that have partial IPv6 support - routing support is enabled at the kernel level, but lacking IPv6 filter support in the iptables module. In the specific example of the codespaces environment, this also has pre-existing legacy iptables rules in the IPv4 tables, as such the nascent firewall mode detection will always pick iptables. We would previously fault trying to install rules to the filter table, this catches that condition earlier, and disables IPv6 support under these conditions. Updates #5621 Updates #11344 Updates #11354 Signed-off-by: James Tucker <james@tailscale.com>	9 months ago
James Tucker	43fba6e04d	util/linuxfw: correct logical error in NAT table check (#11380 ) Updates #11344 Updates #11354 Signed-off-by: James Tucker <james@tailscale.com>	9 months ago
Irbe Krumina	90c4067010	util/linuxfw: add container-friendly IPv6 NAT check (#11353 ) Remove IPv6 NAT check when routing is being set up using nftables. This is unnecessary as support for nftables was added after support for IPv6. https://tldp.org/HOWTO/Linux+IPv6-HOWTO/ch18s04.html https://wiki.nftables.org/wiki-nftables/index.php/Building_and_installing_nftables_from_sources Additionally, run an extra check for IPv6 NAT support when the routing is set up with iptables. This is because the earlier checks rely on being able to use modprobe and on /proc/net/ip6_tables_names being populated on start - these conditions are usually not true in container environments. Updates tailscale/tailscale#11344 Signed-off-by: Irbe Krumina <irbe@tailscale.com>	9 months ago
Paul Scott	2fa20e3787	util/cmpver: add Less/LessEq helper funcs Updates tailscale/corp#17199 Signed-off-by: Paul Scott <paul@tailscale.com>	9 months ago
Irbe Krumina	097c5ed927	util/linuxfw: insert rather than append nftables DNAT rule (#11303 ) Ensure that the latest DNATNonTailscaleTraffic rule gets inserted on top of any pre-existing rules. Updates tailscale/tailscale#11281 Signed-off-by: Irbe Krumina <irbe@tailscale.com>	9 months ago
Andrew Dunham	a20e46a80f	util/cache: fix missing interface methods (#11275 ) Updates #cleanup Change-Id: Ib3a33a7609530ef8c9f3f58fc607a61e8655c4b5 Signed-off-by: Andrew Dunham <andrew@du.nham.ca>	9 months ago
Andrea Gottardo	0359c2f94e	util/syspolicy: add 'ResetToDefaults' (#11194 ) Updates ENG-2133. Adds the ResetToDefaults visibility policy currently only available on macOS, so that the Windows client can read its value. Signed-off-by: Andrea Gottardo <andrea@gottardo.me>	9 months ago
Andrea Gottardo	d756622432	util/syspolicy: add ManagedBy keys for Windows (#11183 )	9 months ago
Andrew Dunham	b7104cde4a	util/topk: add package containing a probabilistic top-K tracker This package uses a count-min sketch and a heap to track the top K items in a stream of data. Tracking a new item and adding a count to an existing item both require no memory allocations and is at worst O(log(k)) complexity. Change-Id: I0553381be3fef2470897e2bd806d43396f2dbb36 Signed-off-by: Andrew Dunham <andrew@du.nham.ca>	9 months ago
Andrew Dunham	c1c50cfcc0	util/cloudenv: add support for DigitalOcean Updates #4984 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: Ib229eb40af36a80e6b0fd1dd0cabb07f0d50a7d1	10 months ago
James Tucker	24bac27632	util/rands: add Shuffle and Perm functions with on-stack RNG state The new math/rand/v2 package includes an m-local global random number generator that can not be reseeded by the user, which is suitable for most uses without the RNG pools we have in a number of areas of the code base. The new API still does not have an allocation-free way of performing a seeded operations, due to the long term compiler bug around interface parameter escapes, and the Source interface. This change introduces the two APIs that math/rand/v2 can not yet replace efficiently: seeded Perm() and Shuffle() operations. This implementation chooses to use the PCG random source from math/rand/v2, as with sufficient compiler optimization, this source should boil down to only two on-stack registers for random state under ideal conditions. Updates #17243 Signed-off-by: James Tucker <james@tailscale.com>	10 months ago
Joe Tsai	94a4f701c2	all: use reflect.TypeFor now available in Go 1.22 (#11078 ) Updates #cleanup Signed-off-by: Joe Tsai <joetsai@digital-static.net>	10 months ago
Joe Tsai	efddad7d7d	util/deephash: cleanup TODO in TestHash (#11080 ) Updates #cleanup Signed-off-by: Joe Tsai <joetsai@digital-static.net>	10 months ago

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363 Commits (3511d1f8a23938dea8ddb5183528eb78ec491d21)