447 Commits (6d82a1891680b95decb5051849a1cdb0fd7f7adc)

Author	SHA1	Message	Date
Josh Bleecher Snyder	d6d1951897	net/packet: add BenchmarkString ... Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
David Anderson	e2dcf63420	net/dns: replace AuthoritativeSuffixes with nil Route entries. ... This leads to a cleaner separation of intent vs. implementation (Routes is now the only place specifying who handles DNS requests), and allows for cleaner expression of a configuration that creates MagicDNS records without serving them to the OS. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	6690f86ef4	net/dns: always offer MagicDNS records at 100.100.100.100. ... Fixes #1886. Signed-off-by: David Anderson <danderson@tailscale.com>	4 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
David Anderson	cfde997699	net/dns: don't use interfaces.Tailscale to find the tailscale interface index. ... interfaces.Tailscale only returns an interface if it has at least one Tailscale IP assigned to it. In the resolved DNS manager, when we're called upon to tear down DNS config, the interface no longer has IPs. Instead, look up the interface index on construction and reuse it throughout the daemon lifecycle. Fixes #1892. Signed-off-by: David Anderson <dave@natulte.net>	4 years ago
Brad Fitzpatrick	3173c5a65c	net/interface: remove darwin fetchRoutingTable workaround ... Fixed upstream. Bump dep. Updates #1345 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
David Anderson	3c8e230ee1	Revert "net/dns: set IPv4 auto mode in NM, so it lets us set DNS." ... This reverts commit 7d16c8228b. I have no idea how I ended up here. The bug I was fixing with this change fails to reproduce on Ubuntu 18.04 now, and this change definitely does break 20.04, 20.10, and Debian Buster. So, until we can reliably reproduce the problem this was meant to fix, reverting. Part of #1875 Signed-off-by: David Anderson <dave@natulte.net>	4 years ago
David Anderson	5bd38b10b4	net/dns: log the correct error when NM Reapply fails. ... Found while debugging #1870. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	7d16c8228b	net/dns: set IPv4 auto mode in NM, so it lets us set DNS. ... Part of #1870. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	77e2375501	net/dns: don't try to configure LLMNR or mdns in NetworkManager. ... Fixes #1870. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
Brad Fitzpatrick	7f2eb1d87a	net/tstun: fix TUN log spam when ACLs drop a packet ... Whenever we dropped a packet due to ACLs, wireguard-go was logging: Failed to write packet to TUN device: packet dropped by filter Instead, just lie to wireguard-go and pretend everything is okay. Fixes #1229 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	42c8b9ad53	net/tstun: remove unnecessary break statement ... Signed-off-by: Josh Bleecher Snyder <josharian@gmail.com>	4 years ago
Brad Fitzpatrick	3237e140c4	tstest/integration: add testNode.AwaitListening, DERP+STUN, improve proxy trap ... Updates #1840	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
David Anderson	bf9ef1ca27	net/dns: stop NetworkManager breaking v6 connectivity when setting DNS. ... Tentative fix for #1699 Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	72b6d98298	net/interfaces: return all Tailscale addresses from Tailscale(). ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	44c2b7dc79	net/dns: on windows, skip site-local v6 resolvers. ... Further refinement for tailscale/corp#1662. Signed-off-by: David Anderson <danderson@tailscale.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
David Anderson	97d2fa2f56	net/dns: work around WSL DNS implementation flaws. ... Fixes tailscale/corp#1662 Signed-off-by: David Anderson <danderson@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
David Anderson	f6b7d08aea	net/dns: work around new NetworkManager in other selection paths. ... Further bits of #1788 Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	25ce9885a2	net/dns: don't use NM+resolved for NM >=1.26.6. ... NetworkManager fixed the bug that forced us to use NetworkManager if it's programming systemd-resolved, and in the same release also made NetworkManager ignore DNS settings provided for unmanaged interfaces... Which breaks what we used to do. So, with versions 1.26.6 and above, we MUST NOT use NetworkManager to indirectly program systemd-resolved, but thankfully we can talk to resolved directly and get the right outcome. Fixes #1788 Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
Brad Fitzpatrick	e41075dd4a	net/interfaces: work around race fetching routing table ... Fixes #1345 Updates golang/go#45736 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
David Anderson	30f5d706a1	net/dns/resolver: remove unnecessary/racy WaitGroup. ... Fixes #1663 Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	89c81c26c5	net/dns: fix resolved match domains when no nameservers are provided. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	4be26b269f	net/dns: correctly capture all traffic in non-split configs. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	ca283ac899	net/dns: remove config in openresolv when given an empty DNS config. ... Part of #1720. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	53213114ec	net/dns: make debian_resolvconf correctly clear DNS configs. ... More of #1720. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	3b1ab78954	net/dns: restore resolv.conf when given an empty config in directManager. ... Fixes #1720. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	158328ba24	net/dns: remove ForceSplitDNSForTesting. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
Naman Sood	71b7e48547	net/tsaddr: expand ephemeral nodes range to /64 ... Signed-off-by: Naman Sood <mail@nsood.in>	4 years ago
Naman Sood	b85d80b37f	net/tsaddr: add new IP range for ephemeral nodes in Tailscale ULA (#1715) ... Signed-off-by: Naman Sood <mail@nsood.in>	4 years ago
David Anderson	bb0710d51d	net/dns: add debugging traces to DNS manager selection on linux. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	4b70c7b717	net/dns: fix inverted test for NetworkManager. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	4849a4d3c8	net/dns: error out on linux if /etc/resolv.conf can't be read. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	1f9b73a531	net/dns: fix freebsd DNS manager selection. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
AdamKorcz	2243bb48c2	stun fuzzer: Small fix ... Signed-off-by: AdamKorcz <adam@adalogics.com>	4 years ago
Brad Fitzpatrick	c2ca2ac8c4	net/dns: fix FreeBSD build ... Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
David Anderson	84bd50329a	net/dns: fix staticheck. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	d6bb11b5bf	net/dns: implement correct manager detection on linux. ... Part of #953. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	9ef932517b	net/dns: fix NM's GetBaseConfig when no configs exist. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	fe3b1ab747	net/dns: refactor dbus connection setup in resolved manager. ... Signed-off-by: David Anderson <danderson@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
David Anderson	9aa33b43e6	net/dns: support split and unsplit DNS in NetworkManager. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	87eb8384f5	net/dns: fix up NetworkManager configurator a bit. ... Clear LLMNR and mdns flags, update reasoning for our settings, and set our override priority harder than before when we want to be primary resolver. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	3d81e6260b	net/dns: set resolved DefaultRoute setting according to split-dns mode. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	cca230cc23	net/dns: fix staticcheck errors. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
Brad Fitzpatrick	4b47393e0c	net/dns: pacify staticcheck for now ... Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
David Anderson	a7340c2015	net/dns: support split DNS in systemd-resolved. ... Signed-off-by: David Anderson <danderson@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	9a48bac8ad	net/dns: rename resolvconf.go to debian_resolvconf.go. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	9831f1b183	net/dns: also include 'tail' and 'base' files when fixing up resolv.conf. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	e43afe9140	net/dns: implement prior config reading for debian resolvconf. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	143e5dd087	net/dns: rename script variable. ... Debian resolvconf is not legacy, it's alive and well, just historically before the other implementations. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	55b39fa945	net/dns: add documentation to openresolv's config fetch. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	61b361bac0	net/dns: teach the openresolv manager to read DNS config. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	58760f7b82	net/dns: split resolvconfManager into a debian and an openresolv manager. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	5480189313	net/dns: implement a DNS override workaround for legacy resolvconf. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	1a371b93be	util/dnsname: add FQDN type, use throughout codebase. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
AdamKorcz	7a1813fd24	Added 2 fuzzers ... Signed-off-by: AdamKorcz <adam@adalogics.com>	4 years ago
David Anderson	e638a4d86b	net/dns: make directManager support split DNS, and work in sandboxes. ... Fixes #1495, #683. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	2685260ba1	net/dns: add temporary fallback to quad-9 resolver for split-DNS testing. ... This allows split-DNS configurations to not break clients on OSes that haven't yet been ported to understand split DNS, by falling back to quad-9 as a global resolver when handed an "impossible to implement" split-DNS config. Part of #953. Needs to be removed before shipping 1.8. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	b9e194c14b	net/dns: add missing FQDN qualification. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	b74a8994ca	net/dns: make FQDN dot style consistent in more places. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	6def647514	net/dns/resolver: don't avoid tailscale routes for DNS forwarding. ... 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	720c1ad0f0	net/dns: insert OS base config when emulating split DNS. ... Part of #953. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	e560be6443	net/dns: sort matchDomains to avoid test flake. ... 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
David Anderson	fe9cd61d71	net/dns: add tests for DNS config generation. ... Part of #953. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	0ba6d03768	net/dns/resolver: add a test helper to get at the resolver config. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	da4cc8bbb4	net/dns: handle all possible translations of high-level DNS config. ... With this change, all OSes can sort-of do split DNS, except that the default upstream is hardcoded to 8.8.8.8 pending further plumbing. Additionally, Windows 8-10 can do split DNS fully correctly, without the 8.8.8.8 hack. Part of #953. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
Brad Fitzpatrick	939861773d	net/tstun: accept peerapi connections through the filter ... Fixes tailscale/corp#1545 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Maisem Ali	57756ef673	net/nettest: make nettest.NewConn pass x/net/nettest.TestConn. ... Signed-off-by: Maisem Ali <maisem@tailscale.com>	4 years ago
David Anderson	e0e677a8f6	net/dns: split out search domains and match domains in OSConfig. ... It seems that all the setups that support split DNS understand this distinction, and it's an important one when translating high-level configuration. Part of #953. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	a8dcda9c9a	net/dns: start of compat hacks for Windows 7. ... Correctly reports that Win7 cannot do split DNS, and has a helper to discover the "base" resolvers for the system. Part of #953 Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	3e915ac783	net/dns: implement OS-level split DNS for Windows. ... Part of #953. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	c16a926bf2	net/dns: set OSConfig.Primary. ... OS implementations are going to support split DNS soon. Until they're all in place, hardcode Primary=true to get the old behavior. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	bc4381447f	net/tstun: return the real interface name at device creation. ... This is usually the same as the requested interface, but on some unixes can vary based on device number allocation, and on Windows it's the GUID instead of the pretty name, since everything relating to configuration wants the GUID. Signed-off-by: David Anderson <danderson@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	b2a597b288	net/dns: rename Set to SetDNS in OSConfigurator. ... wgengine/router.CallbackRouter needs to support both the Router and OSConfigurator interfaces, so the setters can't both be called Set. 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	6a206fd0fb	net/dns: rename impl to os. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	c4530971db	net/dns/resolver: remove leftover debug print. ... 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
David Anderson	748670f1e9	net/dns: fix typo in docstring. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	a39d2403bc	net/dns: disable NetworkManager and resolved configurators temporarily. ... They need some rework to do the right thing, in the meantime the direct and resolvconf managers will work out. The resolved implementation was never selected due to control-side settings. The networkmanager implementation mostly doesn't get selected due to unforeseen interactions with `resolvconf` on many platforms. Both implementations also need rework to support the various routing modes they're capable of. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	befd8e4e68	net/dns: replace managerImpl with OSConfigurator in code. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	077d4dc8c7	net/dns: add an OSConfigurator interface. ... Signed-off-by: David Anderson <danderson@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	2edb57dbf1	net/dns: add new Config that captures tailscale+OS DNS config. ... 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	0ca04f1e01	net/dns: put noop.go back, limit with build tags for staticcheck. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	95470c3448	net/dns: remove Cleanup manager parameter. ... It's only use to skip some optional initialization during cleanup, but that work is very minor anyway, and about to change drastically. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	cf361bb9b1	net/dns: remove PerDomain from Config. ... It's currently unused, and no longer makes sense with the upcoming DNS infrastructure. Keep it in tailcfg for now, since we need protocol compat for a bit longer. 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	9f105d3968	net/dns/resolver: teach the forwarder to do per-domain routing. ... Given a DNS route map, the forwarder selects the right set of upstreams for a given name. Signed-off-by: David Anderson <danderson@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	caeafc4a32	net/dns/resolver: fix package docstring. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	dbe4f6f42d	net/dns/resolver: unexport Resolve and ResolveReverse. ... They're only used internally and in tests, and have surprising semantics in that they only resolve MagicDNS names, not upstream resolver queries. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	cdeb8d6816	net/dns/resolver: fix staticcheck error. ... 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
Denton Gentry	09148c07ba	interfaces: check correct error /proc/net/route ... wrap io.EOF if we hit https://github.com/google/gvisor/issues/5732 Check for the correct err. Signed-off-by: Denton Gentry <dgentry@tailscale.com>	4 years ago
Denton Gentry	a9745a0b68	interfaces: try larger read from /proc/net/route ... Work around https://github.com/google/gvisor/issues/5732 by trying to read /proc/net/route with a larger bufsize if it fails the first time. Signed-off-by: Denton Gentry <dgentry@tailscale.com>	4 years ago
Denton Gentry	54ba6194f7	interfaces: allow IPv6 ULA as a valid address. ... IPv6 Unique Local Addresses are sometimes used with Network Prefix Translation to reach the Internet. In that respect their use is similar to the private IPv4 address ranges 10/8, 172.16/12, and 192.168/16. Treat them as sufficient for AnyInterfaceUp(), but specifically exclude Tailscale's own IPv6 ULA prefix to avoid mistakenly trying to bootstrap Tailscale using Tailscale. This helps in supporting Google Cloud Run, where the addresses are 169.254.8.1/32 and fddf:3978:feb1:d745::c001/128 on eth1. Signed-off-by: Denton Gentry <dgentry@tailscale.com>	4 years ago
Denton Gentry	ecf310be3c	net/tsaddr: IsUla() for IPv6 Unique Local Address ... Signed-off-by: Denton Gentry <dgentry@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
David Anderson	25e0bb0a4e	net/tstun: rename wrap_windows.go to tun_windows.go. ... The code has nothing to do with wrapping, it's windows-specific driver initialization code. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	22d53fe784	net/tstun: document exported function. ... 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	018200aeba	net/tstun: rename from net/tun. ... We depend on wireguard-go/tun, identical leaf packages can be confusing in code. 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
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
Brad Fitzpatrick	7dc88e4c1e	net/interfaces: track more interface metadata in State ... We have it already but threw it away. But macOS/iOS code will be needing the interface index, so hang on to it. Signed-off-by: Brad Fitzpatrick <bradfitz@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	2384c112c9	net/packet, wgengine/{filter,tstun}: add TSMP ping ... Fixes #1467 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	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
Aleksandar Pesic	7b57310966	net/interfaces: use windows API to get the default route instead of parsing `route print` output ... Fixes: #1470 Signed-off-by: Aleksandar Pesic <peske.nis@gmail.com>	4 years ago
David Anderson	6fb5d4080c	net/portmapper: silently handle PCP NOT_AUTHORIZED responses. ... Fixes #1525. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
Brad Fitzpatrick	d5fd373f09	net/interfaces: skip IPv6 link-local interfaces like we do for IPv4 ... We strip them control-side anyway, and we already strip IPv4 link local, so there's no point uploading them. And iOS has a ton of them, which results in somewhat silly amount of traffic in the MapRequest. We'll be doing same-LAN-inter-tailscaled link-local traffic a different way, with same-LAN discovery. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	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	974be2ec5c	net/interfaces: rewrite the darwin likelyHomeRouterIP from C to Go ... We basically already had the RIB-parsing Go code for this in both net/interfaces and wgengine/monitor, for other reasons. Fixes #1426 Fixes #1471 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	c6358f2247	net/netcheck: add a few more STUN retries for prior DERP home ... For #1310, maybe. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	0a84359d2d	tailcfg, net/netcheck: let control mark "Avoid" bit on DERP regions ... So a region can be used if needed, but won't be STUN-probed or used as its home. This gives us another possible debugging mechanism for #1310, or can be used as a short-term measure against DERP flip-flops for people equidistant between regions if our hysteresis still isn't good enough. 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	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
Brad Fitzpatrick	b14ea68754	net/interfaces: log why when we failed to look up gateway on macOS ... Not beautiful, but I'm debugging connectivity problems on NEProvider.sleep+wake and need more clues. Updates #1426 Updates tailscale/corp#1289 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	d37b3b02cd	net/dnsfallback: fix infinite loop and limit number of candidates ... Updates #1455 (fixes the DNS spin part, but other things aren't ideal there) Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 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>	4 years ago
Brad Fitzpatrick	10f48087f4	net/tshttpproxy: call winhttp calls from a fixed OS thread ... We often see things in logs like: 2021-03-02 17:52:45.2456258 +0800 +0800: winhttp: Open: The parameter is incorrect. 2021-03-02 17:52:45.2506261 +0800 +0800: tshttpproxy: winhttp: GetProxyForURL("https://log.tailscale.io/c/tailnode.log.tailscale.io/5037bb42f4bc330e2d6143e191a7ff7e837c6be538139231de69a439536e0d68"): ERROR_INVALID_PARAMETER [unexpected] I have a hunch that WinHTTP has thread-local state. If so, this would fix it. If not, this is pretty harmless. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	8a55d463c8	net/interfaces: merge darwin files for DefaultRouteInterface in sandbox ... DefaultRouteInterface was previously guarded by build tags such that it was only accessible to tailscaled-on-macos, but there was no reason for that. It runs fine in the sandbox and gives better default info, so merge its file into interfaces_darwin.go. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
David Anderson	8d77dfdacb	wgengine/router: add a dummy IPv6 address if needed for default routing. ... Fixes #1339 Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
Brad Fitzpatrick	63ed4dd6c9	net/portmapper: fix typo ... Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
David Anderson	f647e3daaf	ipn/ipnlocal: transform default routes into "all but LAN" routes. ... Fixes #1177. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
Brad Fitzpatrick	9df4185c94	control/controlclient, net/{dnscache,dnsfallback}: add DNS fallback mechanism ... Updates #1405 Updates #1403 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	38dc6fe758	cmd/tailscaled, wgengine: remove --fake, replace with netstack ... And add a --socks5-server flag. And fix a race in SOCKS5 replies where the response header was written concurrently with the copy from the backend. Co-authored with Naman Sood. Updates #707 Updates #504 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Naman Sood	fe16ef6812	net/socks5: create SOCKS5 package for proxy server in userspace networking ... Updates #707 Updates #504 Signed-off-by: Naman Sood <mail@nsood.in>	4 years ago
Brad Fitzpatrick	000b80de9d	net/interfaces: go idle on macOS when wifi/etc is down, ignore utun* interfaces ... Updates tailscale/corp#1289 Updates tailscale/corp#1367 Updates tailscale/corp#1378 Updates tailscale/felicity#4	4 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>	4 years ago
Brad Fitzpatrick	6a2c6541da	net/tshttpproxy: support HTTP proxy environment credentials on Windows too ... and some minor style nits. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Christine Dodrill	3e5c3e932c	net/tshttpproxy: support basic auth when available (#1354) ... This allows proxy URLs such as: http://azurediamond:hunter2@192.168.122.154:38274 to be used in order to dial out to control, logs or derp servers. Signed-off-by: Christine Dodrill <xe@tailscale.com>	4 years ago
Brad Fitzpatrick	f4ae745b0b	net/{interfaces,netns}: add some new tests, missed from prior commit ... I meant for these to be part of 52e24aa966.	4 years ago
Brad Fitzpatrick	e923639feb	net/interfaces: fix staticcheck error on darwin	4 years ago
Brad Fitzpatrick	52e24aa966	net/{interfaces,ns}: add tailscaled-mode darwin routing looping prevention ... Fixes #1331 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	20e66c5b92	net/interfaces: reconcile interface filtering with address printing in logs ... The interface.State logging tried to only log interfaces which had interesting IPs, but the what-is-interesting checks differed between the code that gathered the interface names to print and the printing of their addresses.	4 years ago
Josh Bleecher Snyder	138055dd70	tstest/natlab: use net.ErrClosed instead of a new error ... Upstream wireguard-go decided to use errors.Is(err, net.ErrClosed) instead of checking the error string. It also provided an unsafe linknamed version of net.ErrClosed for clients running Go 1.15. Switch to that. This reduces the time required for the wgengine/magicsock tests on my machine from ~35s back to the ~13s it was before 456cf8a376. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
Brad Fitzpatrick	d37058af72	net/packet: add some more TSMP packet reject reasons and MaybeBroken bit ... Unused for now, but I want to backport this commit to 1.4 so 1.6 can start sending these and then at least 1.4 logs will stringify nicely. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
David Crawshaw	d139fa9c92	net/interfaces: use a uint32_t for ipv4 address ... The code was using a C "int", which is a signed 32-bit integer. That means some valid IP addresses were negative numbers. (In particular, the default router address handed out by AT&T fiber: 192.168.1.254. No I don't know why they do that.) A negative number is < 255, and so was treated by the Go code as an error. This fixes the unit test failure: $ go test -v -run=TestLikelyHomeRouterIPSyscallExec ./net/interfaces === RUN TestLikelyHomeRouterIPSyscallExec interfaces_darwin_cgo_test.go:15: syscall() = invalid IP, false, netstat = 192.168.1.254, true --- FAIL: TestLikelyHomeRouterIPSyscallExec (0.00s) Signed-off-by: David Crawshaw <crawshaw@tailscale.com>	4 years ago
Brad Fitzpatrick	35e10c78fc	net/interfaces: don't send over zt* interfaces ... Fixes #1208 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
David Anderson	692a011b54	net/interfaces: remove IsTailscaleIP, make callers use tsaddr. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
Josh Bleecher Snyder	7c1a9e8616	net/nettest: de-flake tests on Windows ... Windows has a low resolution timer. Some of the tests assumed that unblock takes effect immediately. Consider: t := time.Now() elapsed := time.Now().After(t) It seems plausible that elapsed should always be true. However, with a low resolution timer, that might fail. Change time.Now().After to !time.Now().Before, so that unblocking always takes effect immediately. Fixes #873.	4 years ago
Josh Bleecher Snyder	a64d06f15c	net/nettest: remove pointless checks in tests ... If err == nil, then !errors.Is(err, anything).	4 years ago
Josh Bleecher Snyder	503db5540f	net/nettest: add missing check at end of TestLimit ... This appears to have been an oversight.	4 years ago
Brad Fitzpatrick	b560386c1a	net/packet, wgengine, tstun: add inter-node TSMP protocol for connect errors ... This adds a new IP Protocol type, TSMP on protocol number 99 for sending inter-tailscale messages over WireGuard, currently just for why a peer rejects TCP SYNs (ACL rejection, shields up, and in the future: nothing listening, something listening on that port but wrong interface, etc) Updates #1094 Updates tailscale/corp#1185 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Denton Gentry	ac42757cd7	netcheck: use reflect in sortRegions test. ... Signed-off-by: Denton Gentry <dgentry@tailscale.com>	4 years ago
Denton Gentry	43e060b0e5	netcheck: test sortRegions ... Signed-off-by: Denton Gentry <dgentry@tailscale.com>	4 years ago
Brad Fitzpatrick	5eeaea9ef9	net/packet: add TCPFlag type and some more constants ... Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	ad3fb6125d	net/flowtrack: add Tuple.String method ... Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	676b5b7946	net/netcheck: improve the preferred DERP hysteresis ... Users in Amsterdam (as one example) were flipping back and forth between equidistant London & Frankfurt relays too much. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	4d15e954bd	net/flowtrack: add new package to specialize groupcache/lru key type ... Reduces allocs. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	66be052a70	net/dnscache: work on IPv6-only hosts (again) ... This fixes the regression where we had stopped working on IPv6-only hosts. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Josh Bleecher Snyder	1e88050403	net/tsaddr: add ChromeOS contains tests ... Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
David Anderson	cb96b14bf4	net/packet: remove the custom IP4/IP6 types in favor of netaddr.IP. ... Upstream netaddr has a change that makes it alloc-free, so it's safe to use in hot codepaths. This gets rid of one of the many IP types in our codebase. Performance is currently worse across the board. This is likely due in part to netaddr.IP being a larger value type (4b -> 24b for IPv4, 16b -> 24b for IPv6), and in other part due to missing low-hanging fruit optimizations in netaddr. However, the regression is less bad than it looks at first glance, because we'd micro-optimized packet.IP* in the past few weeks. This change drops us back to roughly where we were at the 1.2 release, but with the benefit of a significant code and architectural simplification. name old time/op new time/op delta pkg:tailscale.com/net/packet goos:linux goarch:amd64 Decode/tcp4-8 12.2ns ± 5% 29.7ns ± 2% +142.32% (p=0.008 n=5+5) Decode/tcp6-8 12.6ns ± 3% 65.1ns ± 2% +418.47% (p=0.008 n=5+5) Decode/udp4-8 11.8ns ± 3% 30.5ns ± 2% +157.94% (p=0.008 n=5+5) Decode/udp6-8 27.1ns ± 1% 65.7ns ± 2% +142.36% (p=0.016 n=4+5) Decode/icmp4-8 24.6ns ± 2% 30.5ns ± 2% +23.65% (p=0.016 n=4+5) Decode/icmp6-8 22.9ns ±51% 65.5ns ± 2% +186.19% (p=0.008 n=5+5) Decode/igmp-8 18.1ns ±44% 30.2ns ± 1% +66.89% (p=0.008 n=5+5) Decode/unknown-8 20.8ns ± 1% 10.6ns ± 9% -49.11% (p=0.016 n=4+5) pkg:tailscale.com/wgengine/filter goos:linux goarch:amd64 Filter/icmp4-8 30.5ns ± 1% 77.9ns ± 3% +155.01% (p=0.008 n=5+5) Filter/tcp4_syn_in-8 43.7ns ± 3% 123.0ns ± 3% +181.72% (p=0.008 n=5+5) Filter/tcp4_syn_out-8 24.5ns ± 2% 45.7ns ± 6% +86.22% (p=0.008 n=5+5) Filter/udp4_in-8 64.8ns ± 1% 210.0ns ± 2% +223.87% (p=0.008 n=5+5) Filter/udp4_out-8 119ns ± 0% 278ns ± 0% +133.78% (p=0.016 n=4+5) Filter/icmp6-8 40.3ns ± 2% 204.4ns ± 4% +407.70% (p=0.008 n=5+5) Filter/tcp6_syn_in-8 35.3ns ± 3% 199.2ns ± 2% +464.95% (p=0.008 n=5+5) Filter/tcp6_syn_out-8 32.8ns ± 2% 81.0ns ± 2% +147.10% (p=0.008 n=5+5) Filter/udp6_in-8 106ns ± 2% 290ns ± 2% +174.48% (p=0.008 n=5+5) Filter/udp6_out-8 184ns ± 2% 314ns ± 3% +70.43% (p=0.016 n=4+5) pkg:tailscale.com/wgengine/tstun goos:linux goarch:amd64 Write-8 9.02ns ± 3% 8.92ns ± 1% ~ (p=0.421 n=5+5) name old alloc/op new alloc/op delta pkg:tailscale.com/net/packet goos:linux goarch:amd64 Decode/tcp4-8 0.00B 0.00B ~ (all equal) Decode/tcp6-8 0.00B 0.00B ~ (all equal) Decode/udp4-8 0.00B 0.00B ~ (all equal) Decode/udp6-8 0.00B 0.00B ~ (all equal) Decode/icmp4-8 0.00B 0.00B ~ (all equal) Decode/icmp6-8 0.00B 0.00B ~ (all equal) Decode/igmp-8 0.00B 0.00B ~ (all equal) Decode/unknown-8 0.00B 0.00B ~ (all equal) pkg:tailscale.com/wgengine/filter goos:linux goarch:amd64 Filter/icmp4-8 0.00B 0.00B ~ (all equal) Filter/tcp4_syn_in-8 0.00B 0.00B ~ (all equal) Filter/tcp4_syn_out-8 0.00B 0.00B ~ (all equal) Filter/udp4_in-8 0.00B 0.00B ~ (all equal) Filter/udp4_out-8 16.0B ± 0% 64.0B ± 0% +300.00% (p=0.008 n=5+5) Filter/icmp6-8 0.00B 0.00B ~ (all equal) Filter/tcp6_syn_in-8 0.00B 0.00B ~ (all equal) Filter/tcp6_syn_out-8 0.00B 0.00B ~ (all equal) Filter/udp6_in-8 0.00B 0.00B ~ (all equal) Filter/udp6_out-8 48.0B ± 0% 64.0B ± 0% +33.33% (p=0.008 n=5+5) name old allocs/op new allocs/op delta pkg:tailscale.com/net/packet goos:linux goarch:amd64 Decode/tcp4-8 0.00 0.00 ~ (all equal) Decode/tcp6-8 0.00 0.00 ~ (all equal) Decode/udp4-8 0.00 0.00 ~ (all equal) Decode/udp6-8 0.00 0.00 ~ (all equal) Decode/icmp4-8 0.00 0.00 ~ (all equal) Decode/icmp6-8 0.00 0.00 ~ (all equal) Decode/igmp-8 0.00 0.00 ~ (all equal) Decode/unknown-8 0.00 0.00 ~ (all equal) pkg:tailscale.com/wgengine/filter goos:linux goarch:amd64 Filter/icmp4-8 0.00 0.00 ~ (all equal) Filter/tcp4_syn_in-8 0.00 0.00 ~ (all equal) Filter/tcp4_syn_out-8 0.00 0.00 ~ (all equal) Filter/udp4_in-8 0.00 0.00 ~ (all equal) Filter/udp4_out-8 1.00 ± 0% 1.00 ± 0% ~ (all equal) Filter/icmp6-8 0.00 0.00 ~ (all equal) Filter/tcp6_syn_in-8 0.00 0.00 ~ (all equal) Filter/tcp6_syn_out-8 0.00 0.00 ~ (all equal) Filter/udp6_in-8 0.00 0.00 ~ (all equal) Filter/udp6_out-8 1.00 ± 0% 1.00 ± 0% ~ (all equal) Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
Brad Fitzpatrick	d0baece5fa	go.mod: bump inet.af/netaddr to non-allocating version	4 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>	4 years ago
David Anderson	baa7937998	net/interfaces: return IPv6 addresses from LocalAddresses. ... In practice, we already provide IPv6 endpoint addresses via netcheck, and that address is likely to match a local address anyway (i.e. no NAT66). The comment at that piece of the code mentions needing to figure out a good priority ordering, but that only applies to non-active-discovery clients, who already don't do anything with IPv6 addresses. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	aa353b8d0f	net/packet: add an IP6 constructor from a raw byte array. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
Josh Bleecher Snyder	a6cad71fb2	go.mod: upgrade staticcheck to 0.1.0 ... Also run go.mod and fix some staticcheck warnings. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
Brad Fitzpatrick	08f94b3b50	net/netcheck: fix offset of unspecified address in PCP request packet ... Fixes #810	4 years ago
Brad Fitzpatrick	05e5233e07	net/netcheck: don't send flood of PCP unmap requests to router ... Updates #810	4 years ago
Josh Bleecher Snyder	1ebbaaaebb	net/interfaces: make syscall and netstat agree when multiple gateways are present ... likelyHomeRouterIPDarwinSyscall iterates through the list of routes, looking for a private gateway, returning the first one it finds. likelyHomeRouterIPDarwinExec does the same thing, except that it returns the last one it finds. As a result, when there are multiple gateways, TestLikelyHomeRouterIPSyscallExec fails. (At least, I think that that is what is happening; I am going inferring from observed behavior.) Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
Brad Fitzpatrick	5d96ecd5e6	net/netstat: remove a bit more unsafe ... Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
David Anderson	3c508a58cc	wgengine/filter: don't filter GCP DNS. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
Brad Fitzpatrick	7a01cd27ca	net/netstat: remove some unsafe ... Just removing any unnecessary unsafe while auditing unsafe usage for #921.	4 years ago
Brad Fitzpatrick	45d96788b5	net/netns: remove use of unsafe on Windows ... Found while auditing unsafe for #921 via the list at: https://github.com/tailscale/tailscale/issues/921#issuecomment-727365383 No need for unsafe here, so remove it.	4 years ago
Josh Bleecher Snyder	b0526e8284	net/packet: remove unnecessary mark ... There's no need to mask out the bottom four bits of b[0] if we are about to shift them away.	4 years ago
Josh Bleecher Snyder	efad55cf86	net/packet: speed up packet decoding ... The compiler is failing to draw the connection between slice cap and slice len, so is missing some obvious BCE opportunities. Give it a hint by making the cap equal to the length. The generated code is smaller and cleaner, and a bit faster. name old time/op new time/op delta Decode/tcp4-8 12.2ns ± 1% 11.6ns ± 3% -5.31% (p=0.000 n=28+29) Decode/tcp6-8 12.5ns ± 2% 11.9ns ± 2% -4.84% (p=0.000 n=30+30) Decode/udp4-8 11.5ns ± 1% 11.1ns ± 1% -3.11% (p=0.000 n=25+24) Decode/udp6-8 11.8ns ± 3% 11.4ns ± 1% -3.08% (p=0.000 n=30+26) Decode/icmp4-8 11.0ns ± 3% 10.6ns ± 1% -3.38% (p=0.000 n=25+30) Decode/icmp6-8 11.4ns ± 1% 11.1ns ± 2% -2.29% (p=0.000 n=27+30) Decode/igmp-8 10.3ns ± 0% 10.0ns ± 1% -3.26% (p=0.000 n=19+23) Decode/unknown-8 8.68ns ± 1% 8.38ns ± 1% -3.55% (p=0.000 n=28+29)	4 years ago
David Anderson	2d604b3791	net/packet: represent IP6 as two uint64s. ... For the operations we perform on these types (mostly net6.Contains), this encoding is much faster. Part of #19. name old time/op new time/op delta Filter/icmp4-8 27.5ns ± 1% 28.0ns ± 2% +1.89% (p=0.016 n=5+5) Filter/tcp4_syn_in-8 38.8ns ± 2% 38.3ns ± 1% -1.24% (p=0.024 n=5+5) Filter/tcp4_syn_out-8 27.6ns ±12% 24.6ns ± 1% ~ (p=0.063 n=5+5) Filter/udp4_in-8 71.5ns ± 5% 65.9ns ± 1% -7.94% (p=0.008 n=5+5) Filter/udp4_out-8 132ns ±13% 119ns ± 1% -10.29% (p=0.008 n=5+5) Filter/icmp6-8 169ns ±10% 54ns ± 1% -68.35% (p=0.008 n=5+5) Filter/tcp6_syn_in-8 149ns ± 6% 43ns ± 1% -71.11% (p=0.008 n=5+5) Filter/tcp6_syn_out-8 37.7ns ± 4% 24.3ns ± 3% -35.51% (p=0.008 n=5+5) Filter/udp6_in-8 179ns ± 5% 103ns ± 1% -42.75% (p=0.008 n=5+5) Filter/udp6_out-8 156ns ± 3% 191ns ± 1% +22.54% (p=0.008 n=5+5) Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	04ff3c91ee	wgengine/filter: add full IPv6 support. ... Part of #19. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
Brad Fitzpatrick	a2d78b4d3e	net/dnscache, control/controlclient: use DNS cache when dialing control ... Cache DNS results of earlier login.tailscale.com control dials, and use them for future dials if DNS is slow or broken. Fixes various issues with trickier setups with the domain's DNS server behind a subnet router. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	97e82c6cc0	net/netcheck: remove unused DNSCache from netcheck ... It's easy to add back later if/when the TODO is implemented.	4 years ago
Brad Fitzpatrick	19b0cfe89e	all: prepare for GOOS=ios in Go 1.16 ... Work with either way for now on iOS (darwin/arm64 vs ios/arm64). In February when Go 1.16 comes out we'll have a universal binary for darwin/arm64 (macOS) and will drop support for Go 1.15 and its darwin/amd64 meaning iOS. (it'll mean macOS). Context: * https://tip.golang.org/doc/go1.16#darwin * https://github.com/golang/go/issues/38485 * https://github.com/golang/go/issues/42100	4 years ago
David Anderson	a38e28da07	net/packet: documentation pass. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	c2cc3acbaf	net/packet: remove NewIP, offer only a netaddr constructor. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	d7ee3096dd	net/packet: documentation cleanups. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	9ef39af2f2	net/packet: fix panic on invalid IHL field. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago