tailscale

Commit Graph

Author	SHA1	Message	Date
Kristoffer Dalby	0e0e53d3b3	util/usermetrics: make usermetrics non-global this commit changes usermetrics to be non-global, this is a building block for correct metrics if a go process runs multiple tsnets or in tests. Updates #13420 Updates tailscale/corp#22075 Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>	1 year ago
Jordan Whited	951884b077	net/netcheck,wgengine/magicsock: plumb OnlyTCP443 controlknob through netcheck (#13491 ) Updates tailscale/corp#17879 Signed-off-by: Jordan Whited <jordan@tailscale.com>	1 year ago
Jordan Whited	5f4a4c6744	wgengine/magicsock: fix sendUDPStd docs (#13490 ) Updates #cleanup Signed-off-by: Jordan Whited <jordan@tailscale.com>	1 year ago
Jordan Whited	4084c6186d	wgengine/magicsock: add side-effect-free function for netcheck UDP sends (#13487 ) Updates #13484 Updates tailscale/corp#17879 Signed-off-by: Jordan Whited <jordan@tailscale.com>	1 year ago
Andrew Dunham	40833a7524	wgengine/magicsock: disable raw disco by default; add envknob to enable Updates #13140 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: Ica85b2ac8ac7eab4ec5413b212f004aecc453279	1 year ago
Jordan Whited	afec2d41b4	wgengine/magicsock: remove redundant deadline from netcheck report call (#13395 ) netcheck.Client.GetReport() applies its own deadlines. This 2s deadline was causing GetReport() to never fall back to HTTPS/ICMP measurements as it was shorter than netcheck.stunProbeTimeout, leaving no time for fallbacks. Updates #13394 Updates #6187 Signed-off-by: Jordan Whited <jordan@tailscale.com>	1 year ago
Brad Fitzpatrick	9f9470fc10	ipnlocal,proxymap,wgengine/netstack: add optional WhoIs/proxymap debug Updates tailscale/corp#20600 Change-Id: I2bb17af0f40603ada1ba4cecc087443e00f9392a Co-authored-by: Maisem Ali <maisem@tailscale.com> Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	1 year ago
Jordan Whited	7aa766ee65	net/tstun: probe TCP GRO (#13376 ) Disable TCP & UDP GRO if the probe fails. torvalds/linux@e269d79c7d broke virtio_net TCP & UDP GRO causing GRO writes to return EINVAL. The bug was then resolved later in torvalds/linux@89add40066. The offending commit was pulled into various LTS releases. Updates #13041 Signed-off-by: Jordan Whited <jordan@tailscale.com>	1 year ago
Brad Fitzpatrick	3d401c11fa	all: use new Go 1.23 slices.Sorted more Updates #12912 Change-Id: If1294e5bc7b5d3cf0067535ae10db75e8b988d8b Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	1 year ago
Andrew Dunham	1c972bc7cb	wgengine/magicsock: actually use AF_PACKET socket for raw disco Previously, despite what the commit said, we were using a raw IP socket that was not an AF_PACKET socket, and thus was subject to the host firewall rules. Switch to using a real AF_PACKET socket to actually get the functionality we want. Updates #13140 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: If657daeeda9ab8d967e75a4f049c66e2bca54b78	1 year ago
Brad Fitzpatrick	65fe0ba7b5	wgengine/magicsock: fix panic regression from cryptokey routing change Fixes #13332 Updates tailscale/corp#20732 Change-Id: I30f12746844bf77f5a664bf8e8d8ebf2511a2b27 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	1 year ago
Jordan Whited	0926954cf5	net/tstun,wgengine/netstack: implement TCP GRO for local services (#13315 ) Throughput improves substantially when measured via netstack loopback (TS_DEBUG_NETSTACK_LOOPBACK_PORT). Before (`d21ebc2`): jwhited@i5-12400-2:~$ iperf3 -V -c 100.100.100.100 Starting Test: protocol: TCP, 1 streams, 131072 byte blocks Test Complete. Summary Results: [ ID] Interval Transfer Bitrate Retr [ 5] 0.00-10.00 sec 5.77 GBytes 4.95 Gbits/sec 0 sender [ 5] 0.00-10.01 sec 5.77 GBytes 4.95 Gbits/sec receiver After: jwhited@i5-12400-2:~$ iperf3 -V -c 100.100.100.100 Starting Test: protocol: TCP, 1 streams, 131072 byte blocks Test Complete. Summary Results: [ ID] Interval Transfer Bitrate Retr [ 5] 0.00-10.00 sec 12.7 GBytes 10.9 Gbits/sec 0 sender [ 5] 0.00-10.00 sec 12.7 GBytes 10.9 Gbits/sec receiver Updates tailscale/corp#22754 Signed-off-by: Jordan Whited <jordan@tailscale.com>	1 year ago
Jordan Whited	d21ebc28af	wgengine/netstack: implement netstack loopback (#13301 ) When the TS_DEBUG_NETSTACK_LOOPBACK_PORT environment variable is set, netstack will loop back (dnat to addressFamilyLoopback:loopbackPort) TCP & UDP flows originally destined to localServicesIP:loopbackPort. localServicesIP is quad-100 or the IPv6 equivalent. Updates tailscale/corp#22713 Signed-off-by: Jordan Whited <jordan@tailscale.com>	1 year ago
Jordan Whited	31cdbd68b1	net/tstun: fix gvisor inbound GSO packet injection (#13283 ) buffs[0] was not sized to hold pkt with GSO, resulting in a panic. Updates tailscale/corp#22511 Signed-off-by: Jordan Whited <jordan@tailscale.com>	1 year ago
Jordan Whited	bfcb3562e6	wgengine/netstack: re-enable gVisor GSO on Linux (#13269 ) This was previously disabled in `8e42510` due to missing GSO-awareness in tstun, which was resolved in `d097096`. Updates tailscale/corp#22511 Signed-off-by: Jordan Whited <jordan@tailscale.com>	1 year ago
Jordan Whited	d097096ddc	net/tstun,wgengine/netstack: make inbound synthetic packet injection GSO-aware (#13266 ) Updates tailscale/corp#22511 Signed-off-by: Jordan Whited <jordan@tailscale.com>	1 year ago
Jordan Whited	6d4973e1e0	wgengine/netstack: use types/logger.Logf instead of stdlib log.Printf (#13267 ) Updates #cleanup Signed-off-by: Jordan Whited <jordan@tailscale.com>	1 year ago
Percy Wegmann	d00d6d6dc2	go.mod: update to github.com/tailscale/netlink library that doesn't require vishvananda/netlink After the upstream PR is merged, we can point directly at github.com/vishvananda/netlink and retire github.com/tailscale/netlink. See https://github.com/vishvananda/netlink/pull/1006 Updates #12298 Signed-off-by: Percy Wegmann <percy@tailscale.com>	1 year ago
Jordan Whited	8e42510a71	wgengine/netstack: disable gVisor GSO on Linux (#13215 ) net/tstun.Wrapper.InjectInboundPacketBuffer is not GSO-aware, which can break quad-100 TCP streams as a result. Linux is the only platform where gVisor GSO was previously enabled. Updates tailscale/corp#22511 Updates #13211 Signed-off-by: Jordan Whited <jordan@tailscale.com>	1 year ago
Jordan Whited	7675c3ebf2	wgengine/netstack/gro: exclude importation of gVisor GRO pkg on iOS (#13202 ) In `df6014f1d7` we removed build tag gating preventing importation, which tripped a NetworkExtension limit test in corp. This was a reversal of `25f0a3fc8f` which actually made the situation worse, hence the simplification. This commit goes back to the strategy in `25f0a3fc8f`, and gets us back under the limit in my local testing. Admittedly, we don't fully understand the effects of importing or excluding importation of this package, and have seen mixed results, but this commit allows us to move forward again. Updates tailscale/corp#22125 Signed-off-by: Jordan Whited <jordan@tailscale.com>	1 year ago
Jordan Whited	df6014f1d7	net/tstun,wgengine{/netstack/gro}: refactor and re-enable gVisor GRO for Linux (#13172 ) In `2f27319baf` we disabled GRO due to a data race around concurrent calls to tstun.Wrapper.Write(). This commit refactors GRO to be thread-safe, and re-enables it on Linux. This refactor now carries a GRO type across tstun and netstack APIs with a lifetime that is scoped to a single tstun.Wrapper.Write() call. In `25f0a3fc8f` we used build tags to prevent importation of gVisor's GRO package on iOS as at the time we believed it was contributing to additional memory usage on that platform. It wasn't, so this commit simplifies and removes those build tags. Updates tailscale/corp#22353 Updates tailscale/corp#22125 Updates #6816 Signed-off-by: Jordan Whited <jordan@tailscale.com>	1 year ago
tomholford	16bb541adb	wgengine/magicsock: replace deprecated poly1305 (#13184 ) Signed-off-by: tomholford <tomholford@users.noreply.github.com>	1 year ago
Jordan Whited	ccf091e4a6	wgengine/magicsock: don't upgrade to linuxBatchingConn on Android (#13161 ) In `a93dc6cdb1` tryUpgradeToBatchingConn() moved to build tag gated files, but the runtime.GOOS condition excluding Android was removed unintentionally from batching_conn_linux.go. Add it back. Updates tailscale/corp#22348 Signed-off-by: Jordan Whited <jordan@tailscale.com>	1 year ago
Andrew Dunham	e107977f75	wgengine/magicsock: disable SIO_UDP_NETRESET on Windows By default, Windows sets the SIO_UDP_CONNRESET and SIO_UDP_NETRESET options on created UDP sockets. These behaviours make the UDP socket ICMP-aware; when the system gets an ICMP message (e.g. an "ICMP Port Unreachable" message, in the case of SIO_UDP_CONNRESET), it will cause the underlying UDP socket to throw an error. Confusingly, this can occur even on reads, if the same UDP socket is used to write a packet that triggers this response. The Go runtime disabled the SIO_UDP_CONNRESET behavior in 3114bd6, but did not change SIO_UDP_NETRESET–probably because that socket option isn't documented particularly well. Various other networking code seem to disable this behaviour, such as the Godot game engine (godotengine/godot#22332) and the Eclipse TCF agent (link below). Others appear to work around this by ignoring the error returned (anacrolix/dht#16, among others). For now, until it's clear whether this ends up in the upstream Go implementation or not, let's also disable the SIO_UDP_NETRESET in a similar manner to SIO_UDP_CONNRESET. Eclipse TCF agent: https://gitlab.eclipse.org/eclipse/tcf/tcf.agent/-/blob/master/agent/tcf/framework/mdep.c Updates #10976 Updates golang/go#68614 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I70a2f19855f8dec1bfb82e63f6d14fc4a22ed5c3	1 year ago
Jordan Whited	2f27319baf	wgengine/netstack: disable gVisor TCP GRO for Linux (#13138 ) A SIGSEGV was observed around packet merging logic in gVisor's GRO package. Updates tailscale/corp#22353 Signed-off-by: Jordan Whited <jordan@tailscale.com>	1 year ago
Brad Fitzpatrick	2dd71e64ac	wgengine/magicsock: log when a ReceiveFunc fails Updates #10976 Change-Id: I86d30151a25c7d42ed36e273fb207873f4acfdb4 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	1 year ago
Brad Fitzpatrick	a61825c7b8	cmd/tta, vnet: add host firewall, env var support, more tests In particular, tests showing that #3824 works. But that test doesn't actually work yet; it only gets a DERP connection. (why?) Updates #13038 Change-Id: Ie1fd1b6a38d4e90fae7e72a0b9a142a95f0b2e8f Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	1 year ago
Jordan Whited	a93dc6cdb1	wgengine/magicsock: refactor batchingUDPConn to batchingConn interface (#13042 ) This commit adds a batchingConn interface, and renames batchingUDPConn to linuxBatchingConn. tryUpgradeToBatchingConn() may return a platform- specific implementation of batchingConn. So far only a Linux implementation of this interface exists, but this refactor is being done in anticipation of a Windows implementation. Updates tailscale/corp#21874 Signed-off-by: Jordan Whited <jordan@tailscale.com>	1 year ago
Jordan Whited	25f0a3fc8f	wgengine/netstack: use build tags to exclude gVisor GRO importation on iOS (#13015 ) Updates tailscale/corp#22125 Signed-off-by: Jordan Whited <jordan@tailscale.com>	1 year ago
Maisem Ali	07e2487c1d	wgengine/capture: fix v6 field typo in wireshark dissector It was using a v4 field for a v6 address. Updates tailscale/corp#8020 Signed-off-by: Maisem Ali <maisem@tailscale.com>	1 year ago
Maisem Ali	a917718353	util/linuxfw: return nil interface not concrete type It was returning a nil `*iptablesRunner` instead of a nil `NetfilterRunner` interface which would then fail checks later. Fixes #13012 Signed-off-by: Maisem Ali <maisem@tailscale.com>	1 year ago
Jordan Whited	d9d9d525d9	wgengine/netstack: increase gVisor's TCP send and receive buffer sizes (#12994 ) This commit increases gVisor's TCP max send (4->6MiB) and receive (4->8MiB) buffer sizes on all platforms except iOS. These values are biased towards higher throughput on high bandwidth-delay product paths. The iperf3 results below demonstrate the effect of this commit between two Linux computers with i5-12400 CPUs. 100ms of RTT latency is introduced via Linux's traffic control network emulator queue discipline. The first set of results are from commit `f0230ce` prior to TCP buffer resizing. gVisor write direction: Test Complete. Summary Results: [ ID] Interval Transfer Bitrate Retr [ 5] 0.00-10.00 sec 180 MBytes 151 Mbits/sec 0 sender [ 5] 0.00-10.10 sec 179 MBytes 149 Mbits/sec receiver gVisor read direction: Test Complete. Summary Results: [ ID] Interval Transfer Bitrate Retr [ 5] 0.00-10.10 sec 337 MBytes 280 Mbits/sec 20 sender [ 5] 0.00-10.00 sec 323 MBytes 271 Mbits/sec receiver The second set of results are from this commit with increased TCP buffer sizes. gVisor write direction: [ ID] Interval Transfer Bitrate Retr [ 5] 0.00-10.00 sec 297 MBytes 249 Mbits/sec 0 sender [ 5] 0.00-10.10 sec 297 MBytes 247 Mbits/sec receiver gVisor read direction: [ ID] Interval Transfer Bitrate Retr [ 5] 0.00-10.10 sec 501 MBytes 416 Mbits/sec 17 sender [ 5] 0.00-10.00 sec 485 MBytes 407 Mbits/sec receiver Updates #9707 Updates tailscale/corp#22119 Signed-off-by: Jordan Whited <jordan@tailscale.com>	1 year ago
Andrew Dunham	9939374c48	wgengine/magicsock: use cloud metadata to get public IPs Updates #12774 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I1661b6a2da7966ab667b075894837afd96f4742f	1 year ago
Jordan Whited	f0230ce0b5	go.mod,net/tstun,wgengine/netstack: implement gVisor TCP GRO for Linux (#12921 ) This commit implements TCP GRO for packets being written to gVisor on Linux. Windows support will follow later. The wireguard-go dependency is updated in order to make use of newly exported IP checksum functions. gVisor is updated in order to make use of newly exported stack.PacketBuffer GRO logic. TCP throughput towards gVisor, i.e. TUN write direction, is dramatically improved as a result of this commit. Benchmarks show substantial improvement, sometimes as high as 2x. High bandwidth-delay product paths remain receive window limited, bottlenecked by gVisor's default TCP receive socket buffer size. This will be addressed in a follow-on commit. The iperf3 results below demonstrate the effect of this commit between two Linux computers with i5-12400 CPUs. There is roughly ~13us of round trip latency between them. The first result is from commit `57856fc` without TCP GRO. Starting Test: protocol: TCP, 1 streams, 131072 byte blocks - - - - - - - - - - - - - - - - - - - - - - - - - Test Complete. Summary Results: [ ID] Interval Transfer Bitrate Retr [ 5] 0.00-10.00 sec 4.77 GBytes 4.10 Gbits/sec 20 sender [ 5] 0.00-10.00 sec 4.77 GBytes 4.10 Gbits/sec receiver The second result is from this commit with TCP GRO. Starting Test: protocol: TCP, 1 streams, 131072 byte blocks - - - - - - - - - - - - - - - - - - - - - - - - - Test Complete. Summary Results: [ ID] Interval Transfer Bitrate Retr [ 5] 0.00-10.00 sec 10.6 GBytes 9.14 Gbits/sec 20 sender [ 5] 0.00-10.00 sec 10.6 GBytes 9.14 Gbits/sec receiver Updates #6816 Signed-off-by: Jordan Whited <jordan@tailscale.com>	1 year ago
Jordan Whited	7bc2ddaedc	go.mod,net/tstun,wgengine/netstack: implement gVisor TCP GSO for Linux (#12869 ) This commit implements TCP GSO for packets being read from gVisor on Linux. Windows support will follow later. The wireguard-go dependency is updated in order to make use of newly exported GSO logic from its tun package. A new gVisor stack.LinkEndpoint implementation has been established (linkEndpoint) that is loosely modeled after its predecessor (channel.Endpoint). This new implementation supports GSO of monster TCP segments up to 64K in size, whereas channel.Endpoint only supports up to 32K. linkEndpoint will also be required for GRO, which will be implemented in a follow-on commit. TCP throughput from gVisor, i.e. TUN read direction, is dramatically improved as a result of this commit. Benchmarks show substantial improvement through a wide range of RTT and loss conditions, sometimes as high as 5x. The iperf3 results below demonstrate the effect of this commit between two Linux computers with i5-12400 CPUs. There is roughly ~13us of round trip latency between them. The first result is from commit `57856fc` without TCP GSO. Starting Test: protocol: TCP, 1 streams, 131072 byte blocks - - - - - - - - - - - - - - - - - - - - - - - - - Test Complete. Summary Results: [ ID] Interval Transfer Bitrate Retr [ 5] 0.00-10.00 sec 2.51 GBytes 2.15 Gbits/sec 154 sender [ 5] 0.00-10.00 sec 2.49 GBytes 2.14 Gbits/sec receiver The second result is from this commit with TCP GSO. Starting Test: protocol: TCP, 1 streams, 131072 byte blocks - - - - - - - - - - - - - - - - - - - - - - - - - Test Complete. Summary Results: [ ID] Interval Transfer Bitrate Retr [ 5] 0.00-10.00 sec 12.6 GBytes 10.8 Gbits/sec 6 sender [ 5] 0.00-10.00 sec 12.6 GBytes 10.8 Gbits/sec receiver Updates #6816 Signed-off-by: Jordan Whited <jordan@tailscale.com>	1 year ago
Brad Fitzpatrick	cf97cff33b	wgengine/netstack: simplify netaddrIPFromNetstackIP Updates #cleanup Change-Id: I66878b08a75d44170460cbf33c895277c187bd8d Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	1 year ago
Irbe Krumina	57856fc0d5	ipn,wgengine/magicsock: allow setting static node endpoints via tailscaled configfile (#12882 ) wgengine/magicsock,ipn: allow setting static node endpoints via tailscaled config file. Adds a new StaticEndpoints field to tailscaled config that can be used to statically configure the endpoints that the node advertizes. This field will replace TS_DEBUG_PRETENDPOINTS env var that can be used to achieve the same. Additionally adds some functionality that ensures that endpoints are updated when configfile is reloaded. Also, refactor configuring/reconfiguring components to use the same functionality when configfile is parsed the first time or subsequent times (after reload). Previously a configfile reload did not result in resetting of prefs. Now it does- but does not yet tell the relevant components to consume the new prefs. This is to be done in a follow-up. Updates tailscale/tailscale#12578 Signed-off-by: Irbe Krumina <irbe@tailscale.com>	1 year ago
Nick Khyl	1608831c33	wgengine/router: use quad-100 as the nexthop on Windows Windows requires routes to have a nexthop. Routes created using the interface's local IP address or an unspecified IP address ("0.0.0.0" or "::") as the nexthop are considered on-link routes. Notably, Windows treats on-link subnet routes differently, reserving the last IP in the range as the broadcast IP and therefore prohibiting TCP connections to it, resulting in WSA error 10049: "The requested address is not valid in its context. This does not happen with single-host routes, such as routes to Tailscale IP addresses, but becomes a problem with advertised subnets when all IPs in the range should be reachable. Before Windows 8, only routes created with an unspecified IP address were considered on-link, so our previous approach of using the interface's own IP as the nexthop likely worked on Windows 7. This PR updates configureInterface to use the TailscaleServiceIP (100.100.100.100) and its IPv6 counterpart as the nexthop for subnet routes. Fixes tailscale/support-escalations#57 Signed-off-by: Nick Khyl <nickk@tailscale.com>	1 year ago
Brad Fitzpatrick	808b4139ee	wgengine/magicsock: use wireguard-go/conn.PeerAwareEndpoint If we get an non-disco presumably-wireguard-encrypted UDP packet from an IP:port we don't recognize, rather than drop the packet, give it to WireGuard anyway and let WireGuard try to figure out who it's from and tell us. This uses the new hook added in https://github.com/tailscale/wireguard-go/pull/27 Updates tailscale/corp#20732 Change-Id: I5c61a40143810592f9efac6c12808a87f924ecf2 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	1 year ago
Lee Briggs	b546a6e758	wgengine/magicsock: allow a CSV list for pretendpoint Load Balancers often have more than one ingress IP, so allowing us to add multiple means we can offer multiple options. Updates #12578 Change-Id: I4aa49a698d457627d2f7011796d665c67d4c7952 Signed-off-by: Lee Briggs <lee@leebriggs.co.uk>	1 year ago
Brad Fitzpatrick	c6af5bbfe8	all: add test for package comments, fix, add comments as needed Updates #cleanup Change-Id: Ic4304e909d2131a95a38b26911f49e7b1729aaef Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	1 year ago
Brad Fitzpatrick	42dac7c5c2	wgengine/magicsock: add debug envknob for injecting an endpoint For testing. Lee wants to play with 'AWS Global Accelerator Custom Routing with Amazon Elastic Kubernetes Service'. If this works well enough, we can promote it. Updates #12578 Change-Id: I5018347ed46c15c9709910717d27305d0aedf8f4 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	1 year ago
Brad Fitzpatrick	d2fef01206	control/controlknobs,tailcfg,wgengine/magicsock: remove DRPO shutoff switch The DERP Return Path Optimization (DRPO) is over four years old (and on by default for over two) and we haven't had problems, so time to remove the emergency shutoff code (controlknob) which we've never used. The controlknobs are only meant for new features, to mitigate risk. But we don't want to keep them forever, as they kinda pollute the code. Updates #150 Change-Id: If021bc8fd1b51006d8bddd1ffab639bb1abb0ad1 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	1 year ago
Brad Fitzpatrick	9df107f4f0	wgengine/magicsock: use derp-region-as-magic-AddrPort hack in fewer places And fix up a bogus comment and flesh out some other comments. Updates #cleanup Change-Id: Ia60a1c04b0f5e44e8d9587914af819df8e8f442a Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	1 year ago
Andrew Dunham	8487fd2ec2	wgengine/magicsock: add more DERP home clientmetrics Updates tailscale/corp#18095 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I423adca2de0730092394bb5fd5796cd35557d352	1 year ago
Andrew Dunham	8161024176	wgengine/magicsock: always set home DERP if no control conn The logic we added in #11378 would prevent selecting a home DERP if we have no control connection. Updates tailscale/corp#18095 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I44bb6ac4393989444e4961b8cfa27dc149a33c6e	1 year ago
Brad Fitzpatrick	5ec01bf3ce	wgengine/filter: support FilterRules matching on srcIP node caps [capver 100] See #12542 for background. Updates #12542 Change-Id: Ida312f700affc00d17681dc7551ee9672eeb1789 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	1 year ago
Keli	bd50a3457d	wgengine/filter: add "Accept" TCP log lines to verbose logging (#12525 ) Changes "Accept" TCP logs to display in verbose logs only, and removes lines from default logging behavior. Updates #12158 Signed-off-by: Keli Velazquez <keli@tailscale.com>	1 year ago
Brad Fitzpatrick	21460a5b14	tailcfg, wgengine/filter: remove most FilterRule.SrcBits code The control plane hasn't sent it to clients in ages. Updates tailscale/corp#20965 Change-Id: I1d71a4b6dd3f75010a05c544ee39827837c30772 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	1 year ago
Brad Fitzpatrick	9e0a5cc551	net/flowtrack: optimize Tuple type for use as map key This gets UDP filter overhead closer to TCP. Still ~2x, but no longer ~3x. goos: darwin goarch: arm64 pkg: tailscale.com/wgengine/filter │ before │ after │ │ sec/op │ sec/op vs base │ FilterMatch/tcp-not-syn-v4-8 15.43n ± 3% 15.38n ± 5% ~ (p=0.339 n=10) FilterMatch/udp-existing-flow-v4-8 42.45n ± 0% 34.77n ± 1% -18.08% (p=0.000 n=10) geomean 25.59n 23.12n -9.65% Updates #12486 Change-Id: I595cfadcc6b7234604bed9c4dd4261e087c0d4c4 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	1 year ago
Brad Fitzpatrick	bd93c3067e	wgengine/filter/filtertype: make Match.IPProto a view I noticed we were allocating these every time when they could just share the same memory. Rather than document ownership, just lock it down with a view. I was considering doing all of the fields but decided to just do this one first as test to see how infectious it became. Conclusion: not very. Updates #cleanup (while working towards tailscale/corp#20514) Change-Id: I8ce08519de0c9a53f20292adfbecd970fe362de0 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	1 year ago
Andrew Dunham	45d2f4301f	proxymap, various: distinguish between different protocols Previously, we were registering TCP and UDP connections in the same map, which could result in erroneously removing a mapping if one of the two connections completes while the other one is still active. Add a "proto string" argument to these functions to avoid this. Additionally, take the "proto" argument in LocalAPI, and plumb that through from the CLI and add a new LocalClient method. Updates tailscale/corp#20600 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I35d5efaefdfbf4721e315b8ca123f0c8af9125fb	1 year ago
Brad Fitzpatrick	20a5f939ba	wgengine/filter: add UDP flow benchmark To show the effects of the flow LRU accounting on e.g. QUIC traffic. For an open TCP connection: BenchmarkFilterMatch/tcp-not-syn-v4-8 66602070 16.74 ns/op BenchmarkFilterMatch/tcp-not-syn-v4-8 67718179 16.60 ns/op BenchmarkFilterMatch/tcp-not-syn-v4-8 68403351 16.84 ns/op BenchmarkFilterMatch/tcp-not-syn-v4-8 66076416 16.87 ns/op BenchmarkFilterMatch/tcp-not-syn-v4-8 67159012 16.67 ns/op BenchmarkFilterMatch/tcp-not-syn-v4-8 65009526 16.58 ns/op BenchmarkFilterMatch/tcp-not-syn-v4-8 66588055 16.62 ns/op BenchmarkFilterMatch/tcp-not-syn-v4-8 63037071 16.58 ns/op BenchmarkFilterMatch/tcp-not-syn-v4-8 69124975 21.15 ns/op BenchmarkFilterMatch/tcp-not-syn-v4-8 54482922 20.41 ns/op And an open UDP connection: BenchmarkFilterMatch/udp-existing-flow-v4-8 25570020 44.09 ns/op BenchmarkFilterMatch/udp-existing-flow-v4-8 26725958 46.99 ns/op BenchmarkFilterMatch/udp-existing-flow-v4-8 25936412 47.11 ns/op BenchmarkFilterMatch/udp-existing-flow-v4-8 25418325 45.99 ns/op BenchmarkFilterMatch/udp-existing-flow-v4-8 25759848 44.73 ns/op BenchmarkFilterMatch/udp-existing-flow-v4-8 25212488 46.26 ns/op BenchmarkFilterMatch/udp-existing-flow-v4-8 25344370 44.55 ns/op BenchmarkFilterMatch/udp-existing-flow-v4-8 26399372 45.26 ns/op BenchmarkFilterMatch/udp-existing-flow-v4-8 26274159 47.51 ns/op BenchmarkFilterMatch/udp-existing-flow-v4-8 26070472 46.79 ns/op Updates #12486 Change-Id: Ica4263fb77972cf43db5a2e9433b4429506edfde Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	1 year ago
Brad Fitzpatrick	86e0f9b912	net/ipset, wgengine/filter/filtertype: add split-out packages This moves NewContainsIPFunc from tsaddr to new ipset package. And wgengine/filter types gets split into wgengine/filter/filtertype, so netmap (and thus the CLI, etc) doesn't need to bring in ipset, bart, etc. Then add a test making sure the CLI deps don't regress. Updates #1278 Change-Id: Ia246d6d9502bbefbdeacc4aef1bed9c8b24f54d5 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	1 year ago
Brad Fitzpatrick	36b1b4af2f	wgengine/filter: split local+logging lookups by IPv4-vs-IPv6 If we already know it's an incoming IPv4 packet, no need to match against the set of IPv6s and vice versa. goos: darwin goarch: arm64 pkg: tailscale.com/wgengine/filter │ before │ after │ │ sec/op │ sec/op vs base │ FilterMatch/not-local-v4-8 21.40n ± 3% 16.04n ± 1% -25.09% (p=0.000 n=10) FilterMatch/not-local-v6-8 20.75n ± 9% 15.71n ± 0% -24.31% (p=0.000 n=10) FilterMatch/no-match-v4-8 81.37n ± 1% 78.57n ± 3% -3.43% (p=0.005 n=10) FilterMatch/no-match-v6-8 77.73n ± 2% 73.71n ± 3% -5.18% (p=0.002 n=10) FilterMatch/tcp-not-syn-v4-8 21.41n ± 3% 16.86n ± 0% -21.25% (p=0.000 n=10) FilterMatch/tcp-not-syn-v4-no-logs-8 10.04n ± 0% 10.05n ± 0% ~ (p=0.446 n=10) geomean 29.07n 25.05n -13.84% Updates #12486 Change-Id: I70e5024af03893327d26629a994ab2aa9811f4f3 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	1 year ago
Brad Fitzpatrick	d4220a76da	wgengine/filter: add TCP non-SYN benchmarks To show performance during heavy flows on established connections. BenchmarkFilterMatch/tcp-not-syn-v4-8 52125848 21.46 ns/op BenchmarkFilterMatch/tcp-not-syn-v4-8 52388781 21.43 ns/op BenchmarkFilterMatch/tcp-not-syn-v4-8 52916954 21.32 ns/op BenchmarkFilterMatch/tcp-not-syn-v4-8 52590730 21.43 ns/op BenchmarkFilterMatch/tcp-not-syn-v4-8 53015923 21.32 ns/op BenchmarkFilterMatch/tcp-not-syn-v4-no-logs-8 122795029 9.783 ns/op BenchmarkFilterMatch/tcp-not-syn-v4-no-logs-8 100000000 10.09 ns/op BenchmarkFilterMatch/tcp-not-syn-v4-no-logs-8 120090948 9.747 ns/op BenchmarkFilterMatch/tcp-not-syn-v4-no-logs-8 122350448 10.55 ns/op BenchmarkFilterMatch/tcp-not-syn-v4-no-logs-8 122943025 9.813 ns/op Updates #12486 Change-Id: I8e7c9380bf969ad646851d53f8a4c287717694ea Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	1 year ago
Brad Fitzpatrick	10e8a2a05c	wgengine/filter: fix copy/pasteo in new benchmark's v6 CIDR I noticed the not-local-v6 numbers were nowhere near the v4 numbers (they should be identical) and then saw this. It meant the Addr().Next() wasn't picking an IP that was no longer local, as assumed. Updates #12486 Change-Id: I18dfb641f00c74c6252666bc41bd2248df15fadd Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	1 year ago
Brad Fitzpatrick	7574f586aa	wgengine/filter: add more benchmarks, make names more explicit Updates #12486 Change-Id: If2e6d9c70212644eb4a0bc8ec6768512894a646a Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	1 year ago
Brad Fitzpatrick	21ed31e33a	wgengine/filter: use NewContainsIPFunc for Srcs matches NewContainsIPFunc returns a contains matcher optimized for its input. Use that instead of what this did before, always doing a test over each of a list of netip.Prefixes. goos: darwin goarch: arm64 pkg: tailscale.com/wgengine/filter │ before │ after │ │ sec/op │ sec/op vs base │ FilterMatch/file1-8 32.60n ± 1% 18.87n ± 1% -42.12% (p=0.000 n=10) Updates #12486 Change-Id: I8f902bc064effb431e5b46751115942104ff6531 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	1 year ago
Brad Fitzpatrick	e2c0d69c9c	wgengine/filter: add filter benchmark Baseline, on 2020 M1 Macbook Pro, on power: goos: darwin goarch: arm64 pkg: tailscale.com/wgengine/filter BenchmarkFilterMatch/file1-8 34089133 32.79 ns/op BenchmarkFilterMatch/file1-8 35423917 32.59 ns/op BenchmarkFilterMatch/file1-8 35208598 32.80 ns/op BenchmarkFilterMatch/file1-8 35180470 33.39 ns/op BenchmarkFilterMatch/file1-8 36671608 32.82 ns/op BenchmarkFilterMatch/file1-8 35435991 33.13 ns/op BenchmarkFilterMatch/file1-8 34689181 33.29 ns/op BenchmarkFilterMatch/file1-8 34786053 32.94 ns/op BenchmarkFilterMatch/file1-8 35366235 32.56 ns/op BenchmarkFilterMatch/file1-8 35342799 32.47 ns/op Updates #12486 Change-Id: I8f902bc064effb431e5b46751115942104ff6531 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	1 year ago
Andrea Gottardo	a8ee83e2c5	health: begin work to use structured health warnings instead of strings, pipe changes into ipn.Notify (#12406 ) Updates tailscale/tailscale#4136 This PR is the first round of work to move from encoding health warnings as strings and use structured data instead. The current health package revolves around the idea of Subsystems. Each subsystem can have (or not have) a Go error associated with it. The overall health of the backend is given by the concatenation of all these errors. This PR polishes the concept of Warnable introduced by @bradfitz a few weeks ago. Each Warnable is a component of the backend (for instance, things like 'dns' or 'magicsock' are Warnables). Each Warnable has a unique identifying code. A Warnable is an entity we can warn the user about, by setting (or unsetting) a WarningState for it. Warnables have: - an identifying Code, so that the GUI can track them as their WarningStates come and go - a Title, which the GUIs can use to tell the user what component of the backend is broken - a Text, which is a function that is called with a set of Args to generate a more detailed error message to explain the unhappy state Additionally, this PR also begins to send Warnables and their WarningStates through LocalAPI to the clients, using ipn.Notify messages. An ipn.Notify is only issued when a warning is added or removed from the Tracker. In a next PR, we'll get rid of subsystems entirely, and we'll start using structured warnings for all errors affecting the backend functionality. Signed-off-by: Andrea Gottardo <andrea@gottardo.me>	1 year ago
Andrew Dunham	72c8f7700b	wgengine/netstack: add test for #12448 This refactors the logic for determining whether a packet should be sent to the host or not into a function, and then adds tests for it. Updates #11304 Updates #12448 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: Ief9afa98eaffae00e21ceb7db073c61b170355e5	1 year ago
Irbe Krumina	88f2d234a4	wgengine/netstack: fix 4via6 subnet routes (#12454 ) Fix a bug where, for a subnet router that advertizes 4via6 route, all packets with a source IP matching the 4via6 address were being sent to the host itself. Instead, only send to host packets whose destination address is host's local address. Fixes tailscale/tailscale#12448 Signed-off-by: Irbe Krumina <irbe@tailscale.com> Co-authored-by: Andrew Dunham <andrew@du.nham.ca>	1 year ago
Aaron Klotz	3511d1f8a2	cmd/tailscaled, net/dns, wgengine/router: start Windows child processes with DETACHED_PROCESS when I/O is being piped When we're starting child processes on Windows that are CLI programs that don't need to output to a console, we should pass in DETACHED_PROCESS as a CreationFlag on SysProcAttr. This prevents the OS from even creating a console for the child (and paying the associated time/space penalty for new conhost processes). This is more efficient than letting the OS create the console window and then subsequently trying to hide it, which we were doing at a few callsites. Fixes #12270 Signed-off-by: Aaron Klotz <aaron@tailscale.com>	2 years ago
Andrew Dunham	e88a5dbc92	various: fix lint warnings Some lint warnings caught by running 'make lint' locally. Updates #cleanup Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I1534ed6f2f5e1eb029658906f9d62607dad98ca3	2 years 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>	2 years ago
Maisem Ali	4a8cb1d9f3	all: use math/rand/v2 more Updates #11058 Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 years ago
Andrea Gottardo	d636407f14	net/dns: don't set MatchDomains on Apple platforms when no upstream nameservers available (#12334 ) This PR addresses a DNS issue on macOS as discussed this morning. Signed-off-by: Andrea Gottardo <andrea@gottardo.me>	2 years ago
Maisem Ali	42cfbf427c	tsnet,wgengine/netstack: add ListenPacket and tests This adds a new ListenPacket function on tsnet.Server which acts mostly like `net.ListenPacket`. Unlike `Server.Listen`, this requires listening on a specific IP and does not automatically listen on both V4 and V6 addresses of the Server when the IP is unspecified. To test this, it also adds UDP support to tsdial.Dialer.UserDial and plumbs it through the localapi. Then an associated test to make sure the UDP functionality works from both sides. Updates #12182 Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 years ago
Brad Fitzpatrick	2d2b62c400	wgengine/router: probe generally-unused "ip" command style lazily This busybox fwmaskWorks check was added before we moved away from using the "ip" command to using netlink directly. So it's now just wasted work (and log spam on Gokrazy) to check the "ip" command capabilities if we're never going to use it. Do it lazily instead. Updates #12277 Change-Id: I8ab9acf64f9c0d8240ce068cb9ec8c0f6b1ecee7 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
James Tucker	9351eec3e1	net/netcheck: remove hairpin probes Palo Alto reported interpreting hairpin probes as LAND attacks, and the firewalls may be responding to this by shutting down otherwise in use NAT sessions prematurely. We don't currently make use of the outcome of the hairpin probes, and they contribute to other user confusion with e.g. the AirPort Extreme hairpin session workaround. We decided in response to remove the whole probe feature as a result. Updates #188 Updates tailscale/corp#19106 Updates tailscale/corp#19116 Signed-off-by: James Tucker <james@tailscale.com>	2 years ago
Andrew Lytvynov	c9179bc261	various: disable stateful filtering by default (#12197 ) After some analysis, stateful filtering is only necessary in tailnets that use `autogroup:danger-all` in `src` in ACLs. And in those cases users explicitly specify that hosts outside of the tailnet should be able to reach their nodes. To fix local DNS breakage in containers, we disable stateful filtering by default. Updates #12108 Signed-off-by: Andrew Lytvynov <awly@tailscale.com>	2 years ago
Brad Fitzpatrick	964282d34f	ipn,wgengine: remove vestigial Prefs.AllowSingleHosts It was requested by the first customer 4-5 years ago and only used for a brief moment of time. We later added netmap visibility trimming which removes the need for this. It's been hidden by the CLI for quite some time and never documented anywhere else. This keeps the CLI flag, though, out of caution. It just returns an error if it's set to anything but true (its default). Fixes #12058 Change-Id: I7514ba572e7b82519b04ed603ff9f3bdbaecfda7 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
James Tucker	8d1249550a	net/netcheck,wgengine/magicsock: add potential workaround for Palo Alto DIPP misbehavior Palo Alto firewalls have a typically hard NAT, but also have a mode called Persistent DIPP that is supposed to provide consistent port mapping suitable for STUN resolution of public ports. Persistent DIPP works initially on most Palo Alto firewalls, but some models/software versions have a bug which this works around. The bug symptom presents as follows: - STUN sessions resolve a consistent public IP:port to start with - Much later netchecks report the same IP:Port for a subset of sessions, most often the users active DERP, and/or the port related to sustained traffic. - The broader set of DERPs in a full netcheck will now consistently observe a new IP:Port. - After this point of observation, new inbound connections will only succeed to the new IP:Port observed, and existing/old sessions will only work to the old binding. In this patch we now advertise the lowest latency global endpoint discovered as we always have, but in addition any global endpoints that are observed more than once in a single netcheck report. This should provide viable endpoints for potential connection establishment across a NAT with this behavior. Updates tailscale/corp#19106 Signed-off-by: James Tucker <james@tailscale.com>	2 years ago
Andrea Gottardo	e5f67f90a2	xcode: allow ICMP ping relay on macOS + iOS platforms (#12048 ) Fixes tailscale/tailscale#10393 Fixes tailscale/corp#15412 Fixes tailscale/corp#19808 On Apple platforms, exit nodes and subnet routers have been unable to relay pings from Tailscale devices to non-Tailscale devices due to sandbox restrictions imposed on our network extensions by Apple. The sandbox prevented the code in netstack.go from spawning the `ping` process which we were using. Replace that exec call with logic to send an ICMP echo request directly, which appears to work in userspace, and not trigger a sandbox violation in the syslog. Signed-off-by: Andrea Gottardo <andrea@gottardo.me>	2 years ago
Claire Wang	e070af7414	ipnlocal, magicsock: add more description to storing last suggested exit (#11998 ) node related functions Updates tailscale/corp#19681 Signed-off-by: Claire Wang <claire@tailscale.com>	2 years ago
Andrew Dunham	5708fc0639	wgengine/router: print Docker warning when stateful filtering is enabled When Docker is detected on the host and stateful filtering is enabled, Docker containers may be unable to reach Tailscale nodes (depending on the network settings of a container). Detect Docker when stateful filtering is enabled and print a health warning to aid users in noticing this issue. We avoid printing the warning if the current node isn't advertising any subnet routes and isn't an exit node, since without one of those being true, the node wouldn't have the correct AllowedIPs in WireGuard to allow a Docker container to connect to another Tailscale node anyway. Updates #12070 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: Idef538695f4d101b0ef6f3fb398c0eaafc3ae281	2 years ago
Andrew Dunham	8f7f9ac17e	wgengine/netstack: handle 4via6 routes that are advertised by the same node Previously, a node that was advertising a 4via6 route wouldn't be able to make use of that same route; the packet would be delivered to Tailscale, but since we weren't accepting it in handleLocalPackets, the packet wouldn't be delivered to netstack and would never hit the 4via6 logic. Let's add that support so that usage of 4via6 is consistent regardless of where the connection is initiated from. Updates #11304 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: Ic28dc2e58080d76100d73b93360f4698605af7cb	2 years ago
Brad Fitzpatrick	21509db121	ipn/ipnlocal, all: plumb health trackers in tests I saw some panics in CI, like: 2024-05-08T04:30:25.9553518Z ## WARNING: (non-fatal) nil health.Tracker (being strict in CI): 2024-05-08T04:30:25.9554043Z goroutine 801 [running]: 2024-05-08T04:30:25.9554489Z tailscale.com/health.(Tracker).nil(0x0) 2024-05-08T04:30:25.9555086Z tailscale.com/health/health.go:185 +0x70 2024-05-08T04:30:25.9555688Z tailscale.com/health.(Tracker).SetUDP4Unbound(0x0, 0x0) 2024-05-08T04:30:25.9556373Z tailscale.com/health/health.go:532 +0x2f 2024-05-08T04:30:25.9557296Z tailscale.com/wgengine/magicsock.(Conn).bindSocket(0xc0003b4808, 0xc0003b4878, {0x1fbca53, 0x4}, 0x0) 2024-05-08T04:30:25.9558301Z tailscale.com/wgengine/magicsock/magicsock.go:2481 +0x12c5 2024-05-08T04:30:25.9559026Z tailscale.com/wgengine/magicsock.(Conn).rebind(0xc0003b4808, 0x0) 2024-05-08T04:30:25.9559874Z tailscale.com/wgengine/magicsock/magicsock.go:2510 +0x16f 2024-05-08T04:30:25.9561038Z tailscale.com/wgengine/magicsock.NewConn({0xc000063c80, 0x0, 0xc000197930, 0xc000197950, 0xc000197960, {0x0, 0x0}, 0xc000197970, 0xc000198ee0, 0x0, ...}) 2024-05-08T04:30:25.9562402Z tailscale.com/wgengine/magicsock/magicsock.go:476 +0xd5f 2024-05-08T04:30:25.9563779Z tailscale.com/wgengine.NewUserspaceEngine(0xc000063c80, {{0x22c8750, 0xc0001976b0}, 0x0, {0x22c3210, 0xc000063c80}, {0x22c31d8, 0x2d3c900}, 0x0, 0x0, ...}) 2024-05-08T04:30:25.9564982Z tailscale.com/wgengine/userspace.go:389 +0x159d 2024-05-08T04:30:25.9565529Z tailscale.com/ipn/ipnlocal.newTestBackend(0xc000358b60) 2024-05-08T04:30:25.9566086Z tailscale.com/ipn/ipnlocal/serve_test.go:675 +0x2a5 2024-05-08T04:30:25.9566612Z ta Updates #11874 Change-Id: I3432ed52d670743e532be4642f38dbd6e3763b1b Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Maisem Ali	af97e7a793	tailcfg,all: add/plumb Node.IsJailed This adds a new bool that can be sent down from control to do jailing on the client side. Previously this would only be done from control by modifying the packet filter we sent down to clients. This would result in a lot of additional work/CPU on control, we could instead just do this on the client. This has always been a TODO which we keep putting off, might as well do it now. Updates tailscale/corp#19623 Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 years ago
Maisem Ali	e67069550b	ipn/ipnlocal,net/tstun,wgengine: create and plumb jailed packet filter This plumbs a packet filter for jailed nodes through to the tstun.Wrapper; the filter for a jailed node is equivalent to a "shields up" filter. Currently a no-op as there is no way for control to tell the client whether a peer is jailed. Updates tailscale/corp#19623 Co-authored-by: Andrew Dunham <andrew@du.nham.ca> Signed-off-by: Maisem Ali <maisem@tailscale.com> Change-Id: I5ccc5f00e197fde15dd567485b2a99d8254391ad	2 years 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>	2 years ago
Claire Wang	35872e86d2	ipnlocal, magicsock: store last suggested exit node id in local backend (#11959 ) Updates tailscale/corp#19681 Signed-off-by: Claire Wang <claire@tailscale.com>	2 years ago
Brad Fitzpatrick	46f3feae96	ssh/tailssh: plumb health.Tracker in test In prep for it being required in more places. Updates #11874 Change-Id: Ib743205fc2a6c6ff3d2c4ed3a2b28cac79156539 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Claire Wang	e0287a4b33	wgengine: add exit destination logging enable for wgengine logger (#11952 ) Updates tailscale/corp#18625 Co-authored-by: Kevin Liang <kevinliang@tailscale.com> Signed-off-by: Claire Wang <claire@tailscale.com>	2 years ago
Andrew Dunham	b2b49cb3d5	wgengine/wgcfg/nmcfg: skip expired peers Updates tailscale/corp#19315 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I1ad0c8796efe3dd456280e51efaf81f6d2049772	2 years ago
Brad Fitzpatrick	b9adbe2002	net/{interfaces,netmon}, all: merge net/interfaces package into net/netmon In prep for most of the package funcs in net/interfaces to become methods in a long-lived netmon.Monitor that can cache things. (Many of the funcs are very heavy to call regularly, whereas the long-lived netmon.Monitor can subscribe to things from the OS and remember answers to questions it's asked regularly later) Updates tailscale/corp#10910 Updates tailscale/corp#18960 Updates #7967 Updates #3299 Change-Id: Ie4e8dedb70136af2d611b990b865a822cd1797e5 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	3672f29a4e	net/netns, net/dns/resolver, etc: make netmon required in most places The goal is to move more network state accessors to netmon.Monitor where they can be cheaper/cached. But first (this change and others) we need to make sure the one netmon.Monitor is plumbed everywhere. Some notable bits: * tsdial.NewDialer is added, taking a now-required netmon * because a tsdial.Dialer always has a netmon, anything taking both a Dialer and a NetMon is now redundant; take only the Dialer and get the NetMon from that if/when needed. * netmon.NewStatic is added, primarily for tests Updates tailscale/corp#10910 Updates tailscale/corp#18960 Updates #7967 Updates #3299 Change-Id: I877f9cb87618c4eb037cee098241d18da9c01691 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	7a62dddeac	net/netcheck, wgengine/magicsock: make netmon.Monitor required This has been a TODO for ages. Time to do it. The goal is to move more network state accessors to netmon.Monitor where they can be cheaper/cached. Updates tailscale/corp#10910 Updates tailscale/corp#18960 Updates #7967 Updates #3299 Change-Id: I60fc6508cd2d8d079260bda371fc08b6318bcaf1 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	7f587d0321	health, wgengine/magicsock: remove last of health package globals Fixes #11874 Updates #4136 Change-Id: Ib70e6831d4c19c32509fe3d7eee4aa0e9f233564 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	745931415c	health, all: remove health.Global, finish plumbing health.Tracker Updates #11874 Updates #4136 Change-Id: I414470f71d90be9889d44c3afd53956d9f26cd61 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	6d69fc137f	ipn/{ipnlocal,localapi},wgengine{,/magicsock}: plumb health.Tracker Down to 25 health.Global users. After this remains controlclient & net/dns & wgengine/router. Updates #11874 Updates #4136 Change-Id: I6dd1856e3d9bf523bdd44b60fb3b8f7501d5dc0d Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	723c775dbb	tsd, ipnlocal, etc: add tsd.System.HealthTracker, start some plumbing This adds a health.Tracker to tsd.System, accessible via a new tsd.System.HealthTracker method. In the future, that new method will return a tsd.System-specific HealthTracker, so multiple tsnet.Servers in the same process are isolated. For now, though, it just always returns the temporary health.Global value. That permits incremental plumbing over a number of changes. When the second to last health.Global reference is gone, then the tsd.System.HealthTracker implementation can return a private Tracker. The primary plumbing this does is adding it to LocalBackend and its dozen and change health calls. A few misc other callers are also plumbed. Subsequent changes will flesh out other parts of the tree (magicsock, controlclient, etc). Updates #11874 Updates #4136 Change-Id: Id51e73cfc8a39110425b6dc19d18b3975eac75ce Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	5b32264033	health: break Warnable into a global and per-Tracker value halves Previously it was both metadata about the class of warnable item as well as the value. Now it's only metadata and the value is per-Tracker. Updates #11874 Updates #4136 Change-Id: Ia1ed1b6c95d34bc5aae36cffdb04279e6ba77015 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	ebc552d2e0	health: add Tracker type, in prep for removing global variables This moves most of the health package global variables to a new `health.Tracker` type. But then rather than plumbing the Tracker in tsd.System everywhere, this only goes halfway and makes one new global Tracker (`health.Global`) that all the existing callers now use. A future change will eliminate that global. Updates #11874 Updates #4136 Change-Id: I6ee27e0b2e35f68cb38fecdb3b2dc4c3f2e09d68 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Percy Wegmann	c8e912896e	wgengine/router: consolidate routes before reconfiguring router for mobile clients This helps reduce memory pressure on tailnets with large numbers of routes. Updates tailscale/corp#19332 Signed-off-by: Percy Wegmann <percy@tailscale.com>	2 years 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>	2 years ago
Nick Khyl	9e1c86901b	wgengine\router: fix the Tailscale-In firewall rule to work on domain networks The Network Location Awareness service identifies networks authenticated against an Active Directory domain and categorizes them as "Domain Authenticated". This includes the Tailscale network if a Domain Controller is reachable through it. If a network is categories as NLM_NETWORK_CATEGORY_DOMAIN_AUTHENTICATED, it is not possible to override its category, and we shouldn't attempt to do so. Additionally, our Windows Firewall rules should be compatible with both private and domain networks. This fixes both issues. Fixes #11813 Signed-off-by: Nick Khyl <nickk@tailscale.com>	2 years ago
Brad Fitzpatrick	03d5d1f0f9	wgengine/magicsock: disable portmapper in tunchan-faked tests Most of the magicsock tests fake the network, simulating packets going out and coming in. There's no reason to actually hit your router to do UPnP/NAT-PMP/PCP during in tests. But while debugging thousands of iterations of tests to deflake some things, I saw it slamming my router. This stops that. Updates #11762 Change-Id: I59b9f48f8f5aff1fa16b4935753d786342e87744 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years 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>	2 years ago
Brad Fitzpatrick	0fba9e7570	cmd/tailscale/cli: prevent concurrent Start calls in 'up' Seems to deflake tstest/integration tests. I can't reproduce it anymore on one of my VMs that was consistently flaking after a dozen runs before. Now I can run hundreds of times. Updates #11649 Fixes #7036 Change-Id: I2f7d4ae97500d507bdd78af9e92cd1242e8e44b8 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	dd6c76ea24	ipn: remove unused Options.LegacyMigrationPrefs I'm on a mission to simplify LocalBackend.Start and its locking and deflake some tests. I noticed this hasn't been used since March 2023 when it was removed from the Windows client in corp 66be796d33c. So, delete. Updates #11649 Change-Id: I40f2cb75fb3f43baf23558007655f65a8ec5e1b2 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Claire Wang	9171b217ba	cmd/tailscale, ipn/ipnlocal: add suggest exit node CLI option (#11407 ) Updates tailscale/corp#17516 Signed-off-by: Claire Wang <claire@tailscale.com>	2 years ago
Charlotte Brandhorst-Satzkorn	449f46c207	wgengine/magicsock: rebind/restun if a syscall.EPERM error is returned (#11711 ) We have seen in macOS client logs that the "operation not permitted", a syscall.EPERM error, is being returned when traffic is attempted to be sent. This may be caused by security software on the client. This change will perform a rebind and restun if we receive a syscall.EPERM error on clients running darwin. Rebinds will only be called if we haven't performed one specifically for an EPERM error in the past 5 seconds. Updates #11710 Signed-off-by: Charlotte Brandhorst-Satzkorn <charlotte@tailscale.com>	2 years ago
Brad Fitzpatrick	952e06aa46	wgengine/router: don't attempt route cleanup on Synology Trying to run iptables/nftables on Synology pauses for minutes with lots of errors and ultimately does nothing as it's not used and we lack permissions. This fixes a regression from `db760d0bac` (#11601) that landed between Synology testing on unstable 1.63.110 and 1.64.0 being cut. Fixes #11737 Change-Id: Iaf9563363b8e45319a9b6fe94c8d5ffaecc9ccef Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
James Tucker	a2eb1c22b0	wgengine/magicsock: allow disco communication without known endpoints Just because we don't have known endpoints for a peer does not mean that the peer should become unreachable. If we know the peers key, it should be able to call us, then we can talk back via whatever path it called us on. First step - don't drop the packet in this context. Updates tailscale/corp#19106 Signed-off-by: James Tucker <james@tailscale.com>	2 years 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>	2 years ago
Maisem Ali	3f4c5daa15	wgengine/netstack: remove SubnetRouterWrapper It was used when we only supported subnet routers on linux and would nil out the SubnetRoutes slice as no other router worked with it, but now we support subnet routers on ~all platforms. The field it was setting to nil is now only used for network logging and nowhere else, so keep the field but drop the SubnetRouterWrapper as it's not useful. Updates #cleanup Change-Id: Id03f9b6ec33e47ad643e7b66e07911945f25db79 Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 years ago
James Tucker	6e334e64a1	net/netcheck,wgengine/magicsock: align DERP frame receive time heuristics The netcheck package and the magicksock package coordinate via the health package, but both sides have time based heuristics through indirect dependencies. These were misaligned, so the implemented heuristic aimed at reducing DERP moves while there is active traffic were non-operational about 3/5ths of the time. It is problematic to setup a good test for this integration presently, so instead I added comment breadcrumbs along with the initial fix. Updates #8603 Signed-off-by: James Tucker <james@tailscale.com>	2 years ago
Joonas Kuorilehto	fe0cfec4ad	wgengine/router: enable ip forwarding on gokrazy Only on Gokrazy, set sysctls to enable IP forwarding so subnet routing and advertised exit node works. Fixes #11405 Signed-off-by: Joonas Kuorilehto <joneskoo@derbian.fi>	2 years ago
Percy Wegmann	853e3e29a0	wgengine/router: provide explicit hook to signal Android when VPN needs to be reconfigured This allows clients to avoid establishing their VPN multiple times when both routes and DNS are changing in rapid succession. Updates tailscale/corp#18928 Signed-off-by: Percy Wegmann <percy@tailscale.com>	2 years ago
Charlotte Brandhorst-Satzkorn	93618a3518	tailscale: update tailfs functions and vars to use drive naming (#11597 ) This change updates all tailfs functions and the majority of the tailfs variables to use the new drive naming. Updates tailscale/corp#16827 Signed-off-by: Charlotte Brandhorst-Satzkorn <charlotte@tailscale.com>	2 years ago
Charlotte Brandhorst-Satzkorn	14683371ee	tailscale: update tailfs file and package names (#11590 ) This change updates the tailfs file and package names to their new naming convention. Updates #tailscale/corp#16827 Signed-off-by: Charlotte Brandhorst-Satzkorn <charlotte@tailscale.com>	2 years 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>	2 years ago
Brad Fitzpatrick	a36cfb4d3d	tailcfg, ipn/ipnlocal, wgengine/magicsock: add only-tcp-443 node attr Updates tailscale/corp#17879 Change-Id: I0dc305d147b76c409cf729b599a94fa723aef0e0 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years 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>	2 years ago
Joe Tsai	85febda86d	all: use zstdframe where sensible (#11491 ) Use the zstdframe package where sensible instead of plumbing around our own zstd.Encoder just for stateless operations. This causes logtail to have a dependency on zstd, but that's arguably okay since zstd support is implicit to the protocol between a client and the logging service. Also, virtually every caller to logger.NewLogger was manually setting up a zstd.Encoder anyways, meaning that zstd was functionally always a dependency. Updates #cleanup Updates tailscale/corp#18514 Signed-off-by: Joe Tsai <joetsai@digital-static.net>	2 years 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>	2 years ago
Andrew Dunham	6da1dc84de	wgengine: fix logger data race in tests Observed in: https://github.com/tailscale/tailscale/actions/runs/8350904950/job/22858266932?pr=11463 Updates #11226 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I9b57db4b34b6ad91d240cd9fa7e344fc0376d52d	2 years ago
Andrew Dunham	7429e8912a	wgengine/netstack: fix bug with duplicate SYN packets in client limit This fixes a bug that was introduced in #11258 where the handling of the per-client limit didn't properly account for the fact that the gVisor TCP forwarder will return 'true' to indicate that it's handled a duplicate SYN packet, but not launch the handler goroutine. In such a case, we neither decremented our per-client limit in the wrapper function, nor did we do so in the handler function, leading to our per-client limit table slowly filling up without bound. Fix this by doing the same duplicate-tracking logic that the TCP forwarder does so we can detect such cases and appropriately decrement our in-flight counter. Updates tailscale/corp#12184 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: Ib6011a71d382a10d68c0802593f34b8153d06892	2 years ago
Andrew Dunham	f072d017bd	wgengine/magicsock: don't change DERP home when not connected to control This pretty much always results in an outage because peers won't discover our new home region and thus won't be able to establish connectivity. Updates tailscale/corp#18095 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: Ic0d09133f198b528dd40c6383b16d7663d9d37a7	2 years ago
Andrew Dunham	62cf83eb92	go.mod: bump gvisor The `stack.PacketBufferPtr` type no longer exists; replace it with `*stack.PacketBuffer` instead. Updates #8043 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: Ib56ceff09166a042aa3d9b80f50b2aa2d34b3683	2 years ago
Andrew Dunham	4338db28f7	wgengine/magicsock: prefer link-local addresses to private ones Since link-local addresses are definitionally more likely to be a direct (lower-latency, more reliable) connection than a non-link-local private address, give those a bit of a boost when selecting endpoints. Updates #8097 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I93fdeb07de55ba39ba5fcee0834b579ca05c2a4e	2 years ago
Brad Fitzpatrick	f18f591bc6	wgengine: plumb the PeerByKey from wgengine to magicsock This was just added in `69f4b459` which doesn't yet use it. This still doesn't yet use it. It just pushes it down deeper into magicsock where it'll used later. Updates #7617 Change-Id: If2f8fd380af150ffc763489e1ff4f8ca2899fac6 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Percy Wegmann	2d5d6f5403	ipn,wgengine: only intercept TailFS traffic on quad 100 This fixes a regression introduced with `993acf4` and released in v1.60.0. The regression caused us to intercept all userspace traffic to port 8080 which prevented users from exposing their own services to their tailnet at port 8080. Now, we only intercept traffic to port 8080 if it's bound for 100.100.100.100 or fd7a:115c:a1e0::53. Fixes #11283 Signed-off-by: Percy Wegmann <percy@tailscale.com> (cherry picked from commit `17cd0626f3`)	2 years ago
Brad Fitzpatrick	69f4b4595a	wgengine{,/wgint}: add wgint.Peer wrapper type, add to wgengine.Engine This adds a method to wgengine.Engine and plumbed down into magicsock to add a way to get a type-safe Tailscale-safe wrapper around a wireguard-go device.Peer that only exposes methods that are safe for Tailscale to use internally. It also removes HandshakeAttempts from PeerStatusLite that was just added as it wasn't needed yet and is now accessible ala cart as needed from the Peer type accessor. None of this is used yet. Updates #7617 Change-Id: I07be0c4e6679883e6eeddf8dbed7394c9e79c5f4 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	b4ff9a578f	wgengine: rename local variable from 'found' to conventional 'ok' Updates #cleanup Change-Id: I799dc86ea9e4a3a949592abdd8e74282e7e5d086 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	a8a525282c	wgengine: use slices.Clone in two places Updates #cleanup Change-Id: I1cb30efb6d09180e82b807d6146f37897ef99307 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	74b8985e19	ipn/ipnstate, wgengine: make PeerStatusLite.LastHandshake zero Time means none ... rather than 1970. Code was using IsZero against the 1970 team (which isn't a zero value), but fortunately not anywhere that seems to have mattered. Updates #cleanup Change-Id: I708a3f2a9398aaaedc9503678b4a8a311e0e019e Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Andrew Dunham	3dd8ae2f26	net/tstun: fix spelling of "WireGuard" Updates #cleanup Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: Ida7e30f4689bc18f5f7502f53a0adb5ac3c7981a	2 years ago
Andrew Dunham	c5abbcd4b4	wgengine/netstack: add a per-client limit for in-flight TCP forwards This is a fun one. Right now, when a client is connecting through a subnet router, here's roughly what happens: 1. The client initiates a connection to an IP address behind a subnet router, and sends a TCP SYN 2. The subnet router gets the SYN packet from netstack, and after running through acceptTCP, starts DialContext-ing the destination IP, without accepting the connection¹ 3. The client retransmits the SYN packet a few times while the dial is in progress, until either... 4. The subnet router successfully establishes a connection to the destination IP and sends the SYN-ACK back to the client, or... 5. The subnet router times out and sends a RST to the client. 6. If the connection was successful, the client ACKs the SYN-ACK it received, and traffic starts flowing As a result, the notification code in forwardTCP never notices when a new connection attempt is aborted, and it will wait until either the connection is established, or until the OS-level connection timeout is reached and it aborts. To mitigate this, add a per-client limit on how many in-flight TCP forwarding connections can be in-progress; after this, clients will see a similar behaviour to the global limit, where new connection attempts are aborted instead of waiting. This prevents a single misbehaving client from blocking all other clients of a subnet router by ensuring that it doesn't starve the global limiter. Also, bump the global limit again to a higher value. ¹ We can't accept the connection before establishing a connection to the remote server since otherwise we'd be opening the connection and then immediately closing it, which breaks a bunch of stuff; see #5503 for more details. Updates tailscale/corp#12184 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I76e7008ddd497303d75d473f534e32309c8a5144	2 years ago
Brad Fitzpatrick	1cf85822d0	ipn/ipnstate, wgengine/wgint: add handshake attempts accessors Not yet used. This is being made available so magicsock/wgengine can use it to ignore certain sends (UDP + DERP) later on at least mobile, letting wireguard-go think it's doing its full attempt schedule, but we can cut it short conditionally based on what we know from the control plane. Updates #7617 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com> Change-Id: Ia367cf6bd87b2aeedd3c6f4989528acdb6773ca7	2 years ago
Brad Fitzpatrick	eb28818403	wgengine: make pendOpen time later, after dup check Otherwise on OS retransmits, we'd make redundant timers in Go's timer heap that upon firing just do nothing (well, grab a mutex and check a map and see that there's nothing to do). Updates #cleanup Change-Id: Id30b8b2d629cf9c7f8133a3f7eca5dc79e81facb Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	219efebad4	wgengine: reduce critical section No need to hold wgLock while using the device to LookupPeer; that has its own mutex already. Updates #cleanup Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com> Change-Id: Ib56049fcc7163cf5a2c2e7e12916f07b4f9d67cb	2 years ago
Nick Khyl	7ef1fb113d	cmd/tailscaled, ipn/ipnlocal, wgengine: shutdown tailscaled if wgdevice is closed Tailscaled becomes inoperative if the Tailscale Tunnel wintun adapter is abruptly removed. wireguard-go closes the device in case of a read error, but tailscaled keeps running. This adds detection of a closed WireGuard device, triggering a graceful shutdown of tailscaled. It is then restarted by the tailscaled watchdog service process. Fixes #11222 Signed-off-by: Nick Khyl <nickk@tailscale.com>	2 years ago
Anton Tolchanov	cd9cf93de6	wgengine/netstack: expose TCP forwarder drops via clientmetrics - add a clientmetric with a counter of TCP forwarder drops due to the max attempts; - fix varz metric types, as they are all counters. Updates #8210 Signed-off-by: Anton Tolchanov <anton@tailscale.com>	2 years ago
Brad Fitzpatrick	e1bd7488d0	all: remove LenIter, use Go 1.22 range-over-int instead Updates #11058 Updates golang/go#65685 Change-Id: Ibb216b346e511d486271ab3d84e4546c521e4e22 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	6ad6d6b252	wgengine/wglog: add TS_DEBUG_RAW_WGLOG envknob for raw wg logs Updates #7617 (part of debugging it) Change-Id: I1bcbdcf0f929e3bcf83f244b1033fd438aa6dac1 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	8b9474b06a	wgengine/wgcfg: don't send UAPI to disable keep-alives on new peers That's already the default. Avoid the overhead of writing it on one side and reading it on the other to do nothing. Updates #cleanup (noticed while researching something else) Change-Id: I449c88a022271afb9be5da876bfaf438fe5d3f58 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
James Tucker	131f9094fd	wgengine/wglog: quieten WireGuard logs for allowedips An increasing number of users have very large subnet route configurations, which can produce very large amounts of log data when WireGuard is reconfigured. The logs don't contain the actual routes, so they're largely useless for diagnostics, so we'll just suppress them. Fixes tailscale/corp#17532 Signed-off-by: James Tucker <james@tailscale.com>	2 years ago
Jason Barnett	4d668416b8	wgengine/router: fix ip rule restoration Fixes #10857 Signed-off-by: Jason Barnett <J@sonBarnett.com>	2 years ago
Aaron Klotz	f7acbefbbb	wgengine/router: make the Windows ifconfig implementation reuse existing MibIPforwardRow2 when possible Looking at profiles, we spend a lot of time in winipcfg.LUID.DeleteRoute looking up the routing table entry for the provided RouteData. But we already have the row! We previously obtained that data via the full table dump we did in getInterfaceRoutes. We can make this a lot faster by hanging onto a reference to the wipipcfg.MibIPforwardRow2 and executing the delete operation directly on that. Fixes #11123 Signed-off-by: Aaron Klotz <aaron@tailscale.com>	2 years ago
Percy Wegmann	c42a4e407a	tailfs: listen for local clients only on 100.100.100.100 FileSystemForLocal was listening on the node's Tailscale address, which potentially exposes the user's view of TailFS shares to other Tailnet users. Remote nodes should connect to exported shares via the peerapi. This removes that code so that FileSystemForLocal is only avaialable on 100.100.100.100:8080. Updates tailscale/corp#16827 Signed-off-by: Percy Wegmann <percy@tailscale.com>	2 years ago
Percy Wegmann	ddcffaef7a	tailfs: disable TailFSForLocal via policy Adds support for node attribute tailfs:access. If this attribute is not present, Tailscale will not accept connections to the local TailFS server at 100.100.100.100:8080. Updates tailscale/corp#16827 Signed-off-by: Percy Wegmann <percy@tailscale.com>	2 years ago
Percy Wegmann	abab0d4197	tailfs: clean up naming and package structure - Restyles tailfs -> tailFS - Defines interfaces for main TailFS types - Moves implemenatation of TailFS into tailfsimpl package Updates tailscale/corp#16827 Signed-off-by: Percy Wegmann <percy@tailscale.com>	2 years ago
Percy Wegmann	993acf4475	tailfs: initial implementation Add a WebDAV-based folder sharing mechanism that is exposed to local clients at 100.100.100.100:8080 and to remote peers via a new peerapi endpoint at /v0/tailfs. Add the ability to manage folder sharing via the new 'share' CLI sub-command. Updates tailscale/corp#16827 Signed-off-by: Percy Wegmann <percy@tailscale.com>	2 years 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>	2 years ago
Jordan Whited	8b47322acc	wgengine/magicsock: implement probing of UDP path lifetime (#10844 ) This commit implements probing of UDP path lifetime on the tail end of an active direct connection. Probing configuration has two parts - Cliffs, which are various timeout cliffs of interest, and CycleCanStartEvery, which limits how often a probing cycle can start, per-endpoint. Initially a statically defined default configuration will be used. The default configuration has cliffs of 10s, 30s, and 60s, with a CycleCanStartEvery of 24h. Probing results are communicated via clientmetric counters. Probing is off by default, and can be enabled via control knob. Probing is purely informational and does not yet drive any magicsock behaviors. Updates #540 Signed-off-by: Jordan Whited <jordan@tailscale.com>	2 years ago
James Tucker	7e3bcd297e	go.mod,wgengine/netstack: bump gvisor Updates #8043 Signed-off-by: James Tucker <james@tailscale.com>	2 years ago
Claire Wang	213d696db0	magicsock: mute noisy expected peer mtu related error (#10870 )	2 years ago
Andrew Dunham	7a0392a8a3	wgengine/netstack: expose gVisor metrics through expvar When tailscaled is run with "-debug 127.0.0.1:12345", these metrics are available at: http://localhost:12345/debug/metrics Updates #8210 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I19db6c445ac1f8344df2bc1066a3d9c9030606f8	2 years ago
Andrew Dunham	6540d1f018	wgengine/router: look up absolute path to netsh.exe on Windows This is in response to logs from a customer that show that we're unable to run netsh due to the following error: router: firewall: adding Tailscale-Process rule to allow UDP for "C:\\Program Files\\Tailscale\\tailscaled.exe" ... router: firewall: error adding Tailscale-Process rule: exec: "netsh": cannot run executable found relative to current directory: There's approximately no reason to ever dynamically look up the path of a system utility like netsh.exe, so instead let's first look for it in the System32 directory and only if that fails fall back to the previous behaviour. Updates #10804 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I68cfeb4cab091c79ccff3187d35f50359a690573	2 years ago
Jordan Whited	b084888e4d	wgengine/magicsock: fix typos in docs (#10729 ) Updates #cleanup Signed-off-by: Jordan Whited <jordan@tailscale.com>	2 years 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>	2 years ago
Andrew Lytvynov	1302bd1181	all: cleanup unused code, part 1 (#10661 ) Run `staticcheck` with `U1000` to find unused code. This cleans up about a half of it. I'll do the other half separately to keep PRs manageable. Updates #cleanup Signed-off-by: Andrew Lytvynov <awly@tailscale.com>	2 years ago
Jordan Whited	685b853763	wgengine/magicsock: fix handling of derp.PeerGoneMessage (#10589 ) The switch in Conn.runDerpReader() on the derp.ReceivedMessage type contained cases other than derp.ReceivedPacket that fell through to writing to c.derpRecvCh, which should only be reached for derp.ReceivedPacket. This can result in the last/previous derp.ReceivedPacket to be re-handled, effectively creating a duplicate packet. If the last derp.ReceivedPacket happens to be a disco.CallMeMaybe it may result in a disco ping scan towards the originating peer on the endpoints contained. The change in this commit moves the channel write on c.derpRecvCh and subsequent select awaiting the result into the derp.ReceivedMessage case, preventing it from being reached from any other case. Explicit continue statements are also added to non-derp.ReceivedPacket cases where they were missing, in order to signal intent to the reader. Fixes #10586 Signed-off-by: Jordan Whited <jordan@tailscale.com>	2 years ago
Andrew Dunham	727acf96a6	net/netcheck: use DERP frames as a signal for home region liveness This uses the fact that we've received a frame from a given DERP region within a certain time as a signal that the region is stil present (and thus can still be a node's PreferredDERP / home region) even if we don't get a STUN response from that region during a netcheck. This should help avoid DERP flaps that occur due to losing STUN probes while still having a valid and active TCP connection to the DERP server. RELNOTE=Reduce home DERP flapping when there's still an active connection Updates #8603 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: If7da6312581e1d434d5c0811697319c621e187a0	2 years ago
Naman Sood	97f84200ac	wgengine/router: implement UpdateMagicsockPort for CallbackRouter (#10494 ) Updates #9084. Signed-off-by: Naman Sood <mail@nsood.in>	2 years ago
Naman Sood	d46a4eced5	util/linuxfw, wgengine: allow ingress to magicsock UDP port on Linux (#10370 ) * util/linuxfw, wgengine: allow ingress to magicsock UDP port on Linux Updates #9084. Currently, we have to tell users to manually open UDP ports on Linux when certain firewalls (like ufw) are enabled. This change automates the process of adding and updating those firewall rules as magicsock changes what port it listens on. Signed-off-by: Naman Sood <mail@nsood.in>	2 years ago
Naman Sood	0a59754eda	linuxfw,wgengine/route,ipn: add c2n and nodeattrs to control linux netfilter Updates tailscale/corp#14029. Signed-off-by: Naman Sood <mail@nsood.in>	2 years ago
James Tucker	215f657a5e	wgengine/router: create netfilter runner in setNetfilterMode This will enable the runner to be replaced as a configuration side effect in a later change. Updates tailscale/corp#14029 Signed-off-by: James Tucker <james@tailscale.com>	2 years ago
Andrew Lytvynov	263e01c47b	wgengine/filter: add protocol-agnostic packet checker (#10446 ) For use in ACL tests, we need a way to check whether a packet is allowed not just with TCP, but any protocol. Updates #3561 Signed-off-by: Andrew Lytvynov <awly@tailscale.com>	2 years ago
Jordan Whited	5e861c3871	wgengine/netstack: disable RACK on Windows (#10402 ) Updates #9707 Signed-off-by: Jordan Whited <jordan@tailscale.com>	2 years ago
Jordan Whited	1af7f5b549	wgengine/magicsock: fix typo in Conn.handlePingLocked() (#10365 ) Updates #cleanup Signed-off-by: Jordan Whited <jordan@tailscale.com>	2 years ago
Brad Fitzpatrick	4d196c12d9	health: don't report a warning in DERP homeless mode Updates #3363 Updates tailscale/corp#396 Change-Id: Ibfb0496821cb58a78399feb88d4206d81e95ca0f Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	3bd382f369	wgengine/magicsock: add DERP homeless debug mode for testing In DERP homeless mode, a DERP home connection is not sought or maintained and the local node is not reachable. Updates #3363 Updates tailscale/corp#396 Change-Id: Ibc30488ac2e3cfe4810733b96c2c9f10a51b8331 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Jordan Whited	2ff54f9d12	wgengine/magicsock: move trustBestAddrUntil forward on non-disco rx (#10274 ) This is gated behind the silent disco control knob, which is still in its infancy. Prior to this change disco pong reception was the only event that could move trustBestAddrUntil forward, so even though we weren't heartbeating, we would kick off discovery pings every trustUDPAddrDuration and mirror to DERP. Updates #540 Signed-off-by: Jordan Whited <jordan@tailscale.com>	2 years ago
Jordan Whited	c99488ea19	wgengine/magicsock: fix typo in endpoint.sendDiscoPing() docs (#10232 ) Updates #cleanup Signed-off-by: Jordan Whited <jordan@tailscale.com>	2 years ago
Jordan Whited	e848736927	control/controlknobs,wgengine/magicsock: implement SilentDisco toggle (#10195 ) This change exposes SilentDisco as a control knob, and plumbs it down to magicsock.endpoint. No changes are being made to magicsock.endpoint disco behavior, yet. Updates #540 Signed-off-by: Jordan Whited <jordan@tailscale.com> Co-authored-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Charlotte Brandhorst-Satzkorn	839fee9ef4	wgengine/magicsock: handle wireguard only clean up and log messages This change updates log messaging when cleaning up wireguard only peers. This change also stops us unnecessarily attempting to clean up disco pings for wireguard only endpoints. Updates #7826 Signed-off-by: Charlotte Brandhorst-Satzkorn <charlotte@tailscale.com>	2 years ago
Maisem Ali	d0f2c0664b	wgengine/netstack: standardize var names in UpdateNetstackIPs Updates #cleanup Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 years ago
Maisem Ali	eaf8aa63fc	wgengine/netstack: remove unnecessary map in UpdateNetstackIPs Updates #cleanup Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 years ago
Maisem Ali	d601c81c51	wgengine/netstack: use netip.Prefix as map keys Updates #cleanup Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 years ago
James Tucker	6f69fe8ad7	wgnengine: remove unused field in userspaceEngine Updates #cleanup Signed-off-by: James Tucker <james@tailscale.com>	2 years ago
Brad Fitzpatrick	514539b611	wgengine/magicsock: close disco listeners on Conn.Close, fix Linux root TestNewConn TestNewConn now passes as root on Linux. It wasn't closing the BPF listeners and their goroutines. The code is still a mess of two Close overlapping code paths, but that can be refactored later. For now, make the two close paths more similar. Updates #9945 Change-Id: I8a3cf5fb04d22ba29094243b8e645de293d9ed85 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
James Tucker	7df6f8736a	wgengine/netstack: only add addresses to correct protocols Prior to an earlier netstack bump this code used a string conversion path to cover multiple cases of behavior seemingly checking for unspecified addresses, adding unspecified addresses to v6. The behavior is now crashy in netstack, as it is enforcing address length in various areas of the API, one in particular being address removal. As netstack is now protocol specific, we must not create invalid protocol addresses - an address is v4 or v6, and the address value contained inside must match. If a control path attempts to do something otherwise it is now logged and skipped rather than incorrect addressing being added. Fixes tailscale/corp#15377 Signed-off-by: James Tucker <james@tailscale.com>	2 years ago
Jordan Whited	891d964bd4	wgengine/magicsock: simplify tryEnableUDPOffload() (#9872 ) Don't assume Linux lacks UDP_GRO support if it lacks UDP_SEGMENT support. This mirrors a similar change in wireguard/wireguard-go@177caa7 for consistency sake. We haven't found any issues here, just being overly paranoid. Updates #cleanup Signed-off-by: Jordan Whited <jordan@tailscale.com>	2 years ago
Brad Fitzpatrick	c363b9055d	tstest/integration: add tests for tun mode (requiring root) Updates #7894 Change-Id: Iff0b07b21ae28c712dd665b12918fa28d6f601d0 Co-authored-by: Maisem Ali <maisem@tailscale.com> Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	a6270826a3	wgengine/magicsock: fix data race regression in disco ping callbacks Regression from `c15997511d`. The callback could be run multiple times from different endpoints. Fixes #9801 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Maisem Ali	5297bd2cff	cmd/tailscaled,net/tstun: fix data race on start-up in TUN mode Fixes #7894 Change-Id: Ice3f8019405714dd69d02bc07694f3872bb598b8 Co-authored-by: Brad Fitzpatrick <bradfitz@tailscale.com> Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 years ago
Brad Fitzpatrick	8b630c91bc	wgengine/filter: use slices.Contains in another place We keep finding these. Updates #cleanup Change-Id: Iabc049b0f8da07341011356f0ecd5315c33ff548 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Maisem Ali	fbfee6a8c0	cmd/containerboot: use linuxfw.NetfilterRunner This migrates containerboot to reuse the NetfilterRunner used by tailscaled instead of manipulating iptables rule itself. This has the added advantage of now working with nftables and we can potentially drop the `iptables` command from the container image in the future. Updates #9310 Co-authored-by: Irbe Krumina <irbe@tailscale.com> Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 years ago
Maisem Ali	05a1f5bf71	util/linuxfw: move detection logic Just a refactor to consolidate the firewall detection logic in a single package so that it can be reused in a later commit by containerboot. Updates #9310 Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 years ago
Val	249edaa349	wgengine/magicsock: add probed MTU metrics Record the number of MTU probes sent, the total bytes sent, the number of times we got a successful return from an MTU probe of a particular size, and the max MTU recorded. Updates #311 Signed-off-by: Val <valerie@tailscale.com>	2 years ago
Val	893bdd729c	disco,net/tstun,wgengine/magicsock: probe peer MTU Automatically probe the path MTU to a peer when peer MTU is enabled, but do not use the MTU information for anything yet. Updates #311 Signed-off-by: Val <valerie@tailscale.com>	2 years ago
Brad Fitzpatrick	6f36f8842c	cmd/tailscale, magicsock: add debug command to flip DERP homes For testing netmap patchification server-side. Updates #1909 Change-Id: Ib1d784bd97b8d4a31e48374b4567404aae5280cc Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	f991c8a61f	tstest: make ResourceCheck panic on parallel tests To find potential flakes earlier. Updates #deflake-effort Change-Id: I52add6111d660821c3a23d4b1dd032821344bc48 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Jordan Whited	eb22c0dfc7	wgengine/magicsock: use binary.NativeEndian for UDP GSO control data (#9640 ) Updates #cleanup Signed-off-by: Jordan Whited <jordan@tailscale.com>	2 years ago
Val	4130851f12	wgengine/magicsock: probe but don't use path MTU from CLI ping When sending a CLI ping with a specific size, continue to probe all possible UDP paths to the peer until we find one with a large enough MTU to accommodate the ping. Record any peer path MTU information we discover (but don't use it for anything other than CLI pings). Updates #311 Signed-off-by: Val <valerie@tailscale.com>	2 years ago
Val	67926ede39	wgengine/magicsock: add MTU to addrLatency and rename to addrQuality Add a field to record the wire MTU of the path to this address to the addrLatency struct and rename it addrQuality. Updates #311 Signed-off-by: Val <valerie@tailscale.com>	2 years ago
Brad Fitzpatrick	425cf9aa9d	tailcfg, all: use []netip.AddrPort instead of []string for Endpoints It's JSON wire compatible. Updates #cleanup Change-Id: Ifa5c17768fec35b305b06d75eb5f0611c8a135a6 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	5f5c9142cc	util/slicesx: add EqualSameNil, like slices.Equal but same nilness Then use it in tailcfg which had it duplicated a couple times. I think we have it a few other places too. And use slices.Equal in wgengine/router too. (found while looking for callers) Updates #cleanup Change-Id: If5350eee9b3ef071882a3db29a305081e4cd9d23 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
James Tucker	324f0d5f80	cmd/cloner,*: revert: optimize nillable slice cloner This reverts commit `ee90cd02fd`. The outcome is not identical for empty slices. Cloner really needs tests! Updates #9601 Signed-off-by: James Tucker <james@tailscale.com>	2 years ago
James Tucker	ee90cd02fd	cmd/cloner,*: optimize nillable slice cloner A wild @josharian appears with a good suggestion for a refactor, thanks Josh! Updates #9410 Signed-off-by: James Tucker <james@tailscale.com>	2 years ago
Jordan Whited	16fa3c24ea	wgengine/magicsock: use x/sys/unix constants for UDP GSO (#9597 ) Updates #cleanup Signed-off-by: Jordan Whited <jordan@tailscale.com>	2 years ago
Andrea Barisani	f50b2a87ec	wgengine/netstack: refactor address construction and conversion Updates #9252 Updates #9253 Signed-off-by: Andrea Barisani <andrea@inversepath.com> Signed-off-by: James Tucker <james@tailscale.com>	2 years ago
Andrea Barisani	b5b4298325	go.mod,*: bump gvisor Updates #9253 Signed-off-by: Andrea Barisani <andrea@inversepath.com> Signed-off-by: James Tucker <james@tailscale.com>	2 years ago
James Tucker	80206b5323	wgengine/magicsock: add nodeid to panic condition on public key reuse If the condition arises, it should be easy to track down. Updates #9547 Signed-off-by: James Tucker <james@tailscale.com>	2 years ago
Val	c608660d12	wgengine,net,ipn,disco: split up and define different types of MTU Prepare for path MTU discovery by splitting up the concept of DefaultMTU() into the concepts of the Tailscale TUN MTU, MTUs of underlying network interfaces, minimum "safe" TUN MTU, user configured TUN MTU, probed path MTU to a peer, and maximum probed MTU. Add a set of likely MTUs to probe. Updates #311 Signed-off-by: Val <valerie@tailscale.com>	2 years ago
Val	578b357849	wgengine/netstack: use buffer pools for UDP packet forwarding Use buffer pools for UDP packet forwarding to prepare for increasing the forwarded UDP packet size for peer path MTU discovery. Updates #311 Co-authored-by: Brad Fitzpatrick <bradfitz@tailscale.com> Signed-off-by: Val <valerie@tailscale.com>	2 years ago
Andrew Dunham	530aaa52f1	net/dns: retry forwarder requests over TCP We weren't correctly retrying truncated requests to an upstream DNS server with TCP. Instead, we'd return a truncated request to the user, even if the user was querying us over TCP and thus able to handle a large response. Also, add an envknob and controlknob to allow users/us to disable this behaviour if it turns out to be buggy (✨ DNS ✨). Updates #9264 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: Ifb04b563839a9614c0ba03e9c564e8924c1a2bfd	2 years ago
Brad Fitzpatrick	3b32d6c679	wgengine/magicsock, controlclient, net/dns: reduce some logspam Updates #cleanup Change-Id: I78b0697a01e94baa33f3de474b591e616fa5e6af Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Val	08302c0731	Revert "wgengine/netstack: use buffer pools for UDP packet forwarding" This reverts commit `fb2f3e4741`. Signed-off-by: Val <valerie@tailscale.com>	2 years ago
Val	6cc5b272d8	Revert "wgengine,net,ipn,disco: split up and define different types of MTU" This reverts commit `059051c58a`. Signed-off-by: Val <valerie@tailscale.com>	2 years ago
Val	059051c58a	wgengine,net,ipn,disco: split up and define different types of MTU Prepare for path MTU discovery by splitting up the concept of DefaultMTU() into the concepts of the Tailscale TUN MTU, MTUs of underlying network interfaces, minimum "safe" TUN MTU, user configured TUN MTU, probed path MTU to a peer, and maximum probed MTU. Add a set of likely MTUs to probe. Updates #311 Signed-off-by: Val <valerie@tailscale.com>	2 years ago
Val	fb2f3e4741	wgengine/netstack: use buffer pools for UDP packet forwarding Use buffer pools for UDP packet forwarding to prepare for increasing the forwarded UDP packet size for peer path MTU discovery. Updates #311 Co-authored-by: Brad Fitzpatrick <bradfitz@tailscale.com> Signed-off-by: Val <valerie@tailscale.com>	2 years ago
Val	65dc711c76	control,tailcfg,wgengine/magicsock: add nodeAttr to enable/disable peer MTU Add a nodeAttr to enable/disable peer path MTU discovery. Updates #311 Signed-off-by: Val <valerie@tailscale.com>	2 years ago
Val	95635857dc	wgengine/magicsock: replace CanPMTUD() with ShouldPMTUD() Replace CanPMTUD() with ShouldPMTUD() to check if peer path MTU discovery should be enabled, in preparation for adding support for enabling/disabling peer MTU dynamically. Updated #311 Signed-off-by: Val <valerie@tailscale.com>	2 years ago
Val	a5ae21a832	wgengine/magicsock: improve don't fragment bit set/get support Add an enable/disable argument to setDontFragment() in preparation for dynamic enable/disable of peer path MTU discovery. Add getDontFragment() to get the status of the don't fragment bit from a socket. Updates #311 Co-authored-by: James Tucker <james@tailscale.com> Signed-off-by: Val <valerie@tailscale.com>	2 years ago
Val	4c793014af	wgengine/magicsock: fix don't fragment setsockopt arg for IPv6 on linux Use IPV6_MTU_DISCOVER for setting don't fragment on IPv6 sockets on Linux (was using IP_MTU_DISCOVER, the IPv4 arg). Updates #311 Signed-off-by: Val <valerie@tailscale.com>	2 years ago
Val	055f3fd843	wgengine/magicsock: rename debugPMTUD() to debugEnablePMTUD() Make the debugknob variable name for enabling peer path MTU discovery match the env variable name. Updates #311 Signed-off-by: Val <valerie@tailscale.com>	2 years ago
Val	bb3d338334	wgengine/magicsock: rename files for peer MTU Rename dontfrag* to peermtu* to prepare for more peer MTU related code going into these files. Updates #311 Signed-off-by: Val <valerie@tailscale.com>	2 years ago
Tom DNetto	c08cf2a9c6	all: declare & plumb IPv6 masquerade address for peer This PR plumbs through awareness of an IPv6 SNAT/masquerade address from the wire protocol through to the low-level (tstun / wgengine). This PR is the first in two PRs for implementing IPv6 NAT support to/from peers. A subsequent PR will implement the data-plane changes to implement IPv6 NAT - this is just plumbing. Signed-off-by: Tom DNetto <tom@tailscale.com> Updates ENG-991	2 years ago
Maisem Ali	4da0689c2c	tailcfg: add Node.HasCap helpers This makes a follow up change less noisy. Updates #cleanup Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 years ago
Maisem Ali	d06b48dd0a	tailcfg: add RawMessage This adds a new RawMessage type backed by string instead of the json.RawMessage which is backed by []byte. The byte slice makes the generated views be a lot more defensive than the need to be which we can get around by using a string instead. Updates #cleanup Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 years ago
Brad Fitzpatrick	0d991249e1	types/netmap: remove NetworkMap.{Addresses,MachineStatus} And convert all callers over to the methods that check SelfNode. Now we don't have multiple ways to express things in tests (setting fields on SelfNode vs NetworkMap, sometimes inconsistently) and don't have multiple ways to check those two fields (often only checking one or the other). Updates #9443 Change-Id: I2d7ba1cf6556142d219fae2be6f484f528756e3c Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Maisem Ali	a61caea911	tailcfg: define a type for NodeCapability Instead of untyped string, add a type to identify these. Updates #cleanup Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 years ago
Brad Fitzpatrick	3d37328af6	wgengine, proxymap: split out port mapping from Engine to new type (Continuing quest to remove rando stuff from the "Engine") Updates #cleanup Change-Id: I77f39902c2194410c10c054b545d70c9744250b0 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	926c990a09	types/netmap: start phasing out Addresses, add GetAddresses method NetworkMap.Addresses is redundant with the SelfNode.Addresses. This works towards a TODO to delete NetworkMap.Addresses and replace it with a method. This is similar to #9389. Updates #cleanup Change-Id: Id000509ca5d16bb636401763d41bdb5f38513ba0 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
James Tucker	1858ad65c8	cmd/cloner: do not allocate slices when the source is nil tailcfg.Node zero-value clone equality checks failed when I added a []*foo to the structure, as the zero value and it's clone contained a different slice header. Updates #9377 Updates #9408 Signed-off-by: James Tucker <james@tailscale.com>	2 years ago
Brad Fitzpatrick	99bb355791	wgengine: remove DiscoKey method from Engine interface It has one user (LocalBackend) which can ask magicsock itself. Updates #cleanup Change-Id: I8c03cbb1e5ba57b0b442621b5fa467030c14a2e2 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	3c276d7de2	wgengine: remove SetDERPMap method from Engine interface (continuing the mission of removing rando methods from the Engine interface that we don't need anymore) Updates #cleanup Change-Id: Id5190917596bf04d7185c3b331a852724a3f5a16 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	b8a4c96c53	wgengine: remove LinkChange method from Engine interface It was only used by Android, until https://github.com/tailscale/tailscale-android/pull/131 which does the call to the netMon directly instead. Updates #cleanup Change-Id: Iab8a1d8f1e63250705835c75f40e2cd8c1c4d5b8 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	727b1432a8	wgengine: remove SetNetInfoCallback method from Engine LocalBackend can talk to magicsock on its own to do this without the "Engine" being involved. (Continuing a little side quest of cleaning up the Engine interface...) Updates #cleanup Change-Id: I8654acdca2b883b1bd557fdc0cfb90cd3a418a62 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	343c0f1031	wgengine{,/netstack}: remove AddNetworkMapCallback from Engine interface It had exactly one user: netstack. Just have LocalBackend notify netstack when here's a new netmap instead, simplifying the bloated Engine interface that has grown a bunch of non-Engine-y things. (plenty of rando stuff remains after this, but it's a start) Updates #cleanup Change-Id: I45e10ab48119e962fc4967a95167656e35b141d8 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	3af051ea27	control/controlclient, types/netmap: start plumbing delta netmap updates Currently only the top four most popular changes: endpoints, DERP home, online, and LastSeen. Updates #1909 Change-Id: I03152da176b2b95232b56acabfb55dcdfaa16b79 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	ff6fadddb6	wgengine/magicsock: stop retaining *netmap.NetworkMap We're trying to start using that monster type less and eventually get rid of it. Updates #1909 Change-Id: I8e1e725bce5324fb820a9be6c7952767863e6542 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	f06e64c562	wgengine: use set.HandleSet in another place I guess we missed this one earlier when we unified the various copies into set.HandleSet. Updates #cleanup Change-Id: I7e6de9ce16e8fc4846abf384dfcc8eaec4d99e60 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	42072683d6	control/controlknobs: move ForceBackgroundSTUN to controlknobs.Knobs This is both more efficient (because the knobs' bool is only updated whenever Node is changed, rarely) and also gets us one step closer to removing a case of storing a netmap.NetworkMap in magicsock. (eventually we want to phase out much of the use of that type internally) Updates #1909 Change-Id: I37e81789f94133175064fdc09984e4f3a431f1a1 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	4e91cf20a8	control/controlknobs, all: add plumbed Knobs type, not global variables Previously two tsnet nodes in the same process couldn't have disjoint sets of controlknob settings from control as both would overwrite each other's global variables. This plumbs a new controlknobs.Knobs type around everywhere and hangs the knobs sent by control on that instead. Updates #9351 Change-Id: I75338646d36813ed971b4ffad6f9a8b41ec91560 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	d050700a3b	wgengine/magicsock: make peerMap also keyed by NodeID In prep for incremental netmap update plumbing (#1909), make peerMap also keyed by NodeID, as all the netmap node mutations passed around later will be keyed by NodeID. In the process, also: * add envknob.InDevMode, as a signal that we can panic more aggressively in unexpected cases. * pull two moderately large blocks of code in Conn.SetNetworkMap out into their own methods * convert a few more sets from maps to set.Set Updates #1909 Change-Id: I7acdd64452ba58e9d554140ee7a8760f9043f961 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	dc7aa98b76	all: use set.Set consistently instead of map[T]struct{} I didn't clean up the more idiomatic map[T]bool with true values, at least yet. I just converted the relatively awkward struct{}-valued maps. Updates #cleanup Change-Id: I758abebd2bb1f64bc7a9d0f25c32298f4679c14f Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Craig Rodrigues	8683ce78c2	client/web, clientupdate, util/linuxfw, wgengine/magicsock: Use %v verb for errors Replace %w verb with %v verb when logging errors. Use %w only for wrapping errors with fmt.Errorf() Fixes: #9213 Signed-off-by: Craig Rodrigues <rodrigc@crodrigues.org>	2 years ago
Brad Fitzpatrick	98a5116434	all: adjust some build tags for plan9 I'm not saying it works, but it compiles. Updates #5794 Change-Id: I2f3c99732e67fe57a05edb25b758d083417f083e Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	ea4425d8a9	ipn/ipnlocal, wgengine/magicsock: move UpdateStatus stuff around Upcoming work on incremental netmap change handling will require some replumbing of which subsystems get notified about what. Done naively, it could break "tailscale status --json" visibility later. To make sure I understood the flow of all the updates I was rereading the status code and realized parts of ipnstate.Status were being populated by the wrong subsystems. The engine (wireguard) and magicsock (data plane, NAT traveral) should only populate the stuff that they uniquely know. The WireGuard bits were fine but magicsock was populating stuff stuff that LocalBackend could've better handled, so move it there. Updates #1909 Change-Id: I6d1b95d19a2d1b70fbb3c875fac8ea1e169e8cb0 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	9089efea06	net/netmon: make ChangeFunc's signature take new ChangeDelta, not bool Updates #9040 Change-Id: Ia43752064a1a6ecefc8802b58d6eaa0b71cf1f84 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
James Tucker	e1c7e9b736	wgengine/magicsock: improve endpoint selection for WireGuard peers with rx time If we don't have the ICMP hint available, such as on Android, we can use the signal of rx traffic to bias toward a particular endpoint. We don't want to stick to a particular endpoint for a very long time without any signals, so the sticky time is reduced to 1 second, which is large enough to avoid excessive packet reordering in the common case, but should be small enough that either rx provides a strong signal, or we rotate in a user-interactive schedule to another endpoint, improving the feel of failover to other endpoints. Updates #8999 Co-authored-by: Charlotte Brandhorst-Satzkorn <charlotte@tailscale.com> Signed-off-by: James Tucker <james@tailscale.com> Signed-off-by: Charlotte Brandhorst-Satzkorn <charlotte@tailscale.com>	2 years ago
James Tucker	5edb39d032	wgengine/magicsock: clear out endpoint statistics when it becomes bad There are cases where we do not detect the non-viability of a route, but we will instead observe a failure to send. In a Disco path this would normally be handled as a side effect of Disco, which is not available to non-Disco WireGuard nodes. In both cases, recognizing the failure as such will result in faster convergence. Updates #8999 Signed-off-by: James Tucker <james@tailscale.com>	2 years ago
Charlotte Brandhorst-Satzkorn	7c9c68feed	wgengine/magicsock: update lastfullping comment to include wg only LastFullPing is now used for disco or wireguard only endpoints. This change updates the comment to make that clear. Updates #7826 Signed-off-by: Charlotte Brandhorst-Satzkorn <charlotte@tailscale.com>	2 years ago
James Tucker	3a652d7761	wgengine/magicsock: clear endpoint state in noteConnectivityChange There are latency values stored in bestAddr and endpointState that are no longer applicable after a connectivity change and should be cleared out, following the documented behavior of the function. Updates #8999 Signed-off-by: James Tucker <james@tailscale.com>	2 years ago
Brad Fitzpatrick	947def7688	types/netmap: remove redundant Netmap.Hostinfo It was in SelfNode.Hostinfo anyway. The redundant copy was just costing us an allocation per netmap (a Hostinfo.Clone). Updates #1909 Change-Id: Ifac568aa5f8054d9419828489442a0f4559bc099 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	84b94b3146	types/netmap, all: make NetworkMap.SelfNode a tailcfg.NodeView Updates #1909 Change-Id: I8c470cbc147129a652c1d58eac9b790691b87606 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Val	c15997511d	wgengine/magicsock: only accept pong sent by CLI ping When sending a ping from the CLI, only accept a pong that is in reply to the specific CLI ping we sent. Updates #311 Signed-off-by: Val <valerie@tailscale.com>	2 years ago
Maisem Ali	8a5ec72c85	cmd/cloner: use maps.Clone and ptr.To Updates #cleanup Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 years ago
Brad Fitzpatrick	58a4fd43d8	types/netmap, all: use read-only tailcfg.NodeView in NetworkMap Updates #8948 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
KevinLiang10	93cab56277	wgengine/router: fall back and set iptables as default again Due to the conflict between our nftables implementation and ufw, which is a common utility used on linux. We now want to take a step back to prevent regression. This will give us more chance to let users to test our nftables support and heuristic. Updates: #391 Signed-off-by: KevinLiang10 <kevinliang@tailscale.com>	2 years ago
Brad Fitzpatrick	af2e4909b6	all: remove some Debug fields, NetworkMap.Debug, Reconfig Debug arg Updates #8923 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	25663b1307	tailcfg: remove most Debug fields, move bulk to nodeAttrs [capver 70] Now a nodeAttr: ForceBackgroundSTUN, DERPRoute, TrimWGConfig, DisableSubnetsIfPAC, DisableUPnP. Kept support for, but also now a NodeAttr: RandomizeClientPort. Removed: SetForceBackgroundSTUN, SetRandomizeClientPort (both never used, sadly... never got around to them. But nodeAttrs are better anyway), EnableSilentDisco (will be a nodeAttr later when that effort resumes). Updates #8923 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	bc0eb6b914	all: import x/exp/maps as xmaps to distinguish from Go 1.21 "maps" Updates #8419 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	e8551d6b40	all: use Go 1.21 slices, maps instead of x/exp/{slices,maps} Updates #8419 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago

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