tailscale

Commit Graph

Author	SHA1	Message	Date
Andrew Dunham	33b359642e	net/dns: don't send on closed channel in resolvedManager Fixes #7686 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: Ibffb05539ab876b12407d77dcf2201d467895981	2 years ago
Andrew Dunham	4cb1bfee44	net/netcheck: improve determinism in hairpinning test If multiple Go channels have a value (or are closed), receiving from them all in a select will nondeterministically return one of the two arms. In this case, it's possible that the hairpin check timer will have expired between when we start checking and before we check at all, but the hairpin packet has already been received. In such cases, we'd nondeterministically set report.HairPinning. Instead, check if we have a value in our results channel first, then select on the value and timeout channel after. Also, add a test that catches this particular failure. Fixes #1795 Change-Id: I842ab0bd38d66fabc6cabf2c2c1bb9bd32febf35 Signed-off-by: Andrew Dunham <andrew@du.nham.ca>	2 years ago
Maisem Ali	0e203e414f	net/packet: add checksum update tests Updates tailscale/corp#8020 Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 years ago
Maisem Ali	0bf8c8e710	net/tstun: use p.Buffer() in more places Updates tailscale/corp#8020 Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 years ago
Maisem Ali	bb31fd7d1c	net/tstun: add inital support for NAT v4 This adds support in tstun to utitilize the SelfNodeV4MasqAddrForThisPeer and perform the necessary modifications to the packet as it passes through tstun. Currently this only handles ICMP, UDP and TCP traffic. Subnet routers and Exit Nodes are also unsupported. Updates tailscale/corp#8020 Co-authored-by: Melanie Warrick <warrick@tailscale.com> Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 years ago
Maisem Ali	535fad16f8	net/tstun: rename filterIn/filterOut methods to be more descriptive Updates tailscale/corp#8020 Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 years ago
Mihai Parparita	d2dec13392	net/sockstats: export cellular-only clientmetrics Followup to #7518 to also export client metrics when the active interface is cellular. Updates tailscale/corp#9230 Updates #3363 Signed-off-by: Mihai Parparita <mihai@tailscale.com>	2 years ago
Denton Gentry	ebc630c6c0	net/interfaces: also allow link-local for AzureAppServices. In May 2021, Azure App Services used 172.16.x.x addresses: ``` 10: eth0@if11: <BROADCAST,MULTICAST,UP,LOWER_UP,M-DOWN> mtu 1500 qdisc noqueue state UP link/ether 02:42:ac:10:01:03 brd ff:ff:ff:ff:ff:ff inet 172.16.1.3/24 brd 172.16.1.255 scope global eth0 valid_lft forever preferred_lft forever ``` Now it uses link-local: ``` 2: eth0@if6: <BROADCAST,MULTICAST,UP,LOWER_UP,M-DOWN> mtu 1500 qdisc noqueue state UP link/ether 8a:30:1f:50:1d:23 brd ff:ff:ff:ff:ff:ff inet 169.254.129.3/24 brd 169.254.129.255 scope global eth0 valid_lft forever preferred_lft forever ``` This is reasonable for them to choose to do, it just broke the handling in net/interfaces. This PR proposes to: 1. Always allow link-local in LocalAddresses() if we have no better address available. 2. Continue to make isUsableV4() conditional on an environment we know requires it. I don't love the idea of having to discover these environments one by one, but I don't understand the consequences of making isUsableV4() return true unconditionally. It makes isUsableV4() essentially always return true and perform no function. Fixes https://github.com/tailscale/tailscale/issues/7603 Signed-off-by: Denton Gentry <dgentry@tailscale.com>	2 years ago
Mihai Parparita	97b6d3e917	sockstats: remove per-interface stats from Get They're not needed for the sockstats logger, and they're somewhat expensive to return (since they involve the creation of a map per label). We now have a separate GetInterfaces() method that returns them instead (which we can still use in the PeerAPI debug endpoint). If changing sockstatlog to sample at 10,000 Hz (instead of the default of 10Hz), the CPU usage would go up to 59% on a iPhone XS. Removing the per-interface stats drops it to 20% (a no-op implementation of Get that returns a fixed value is 16%). Updates tailscale/corp#9230 Updates #3363 Signed-off-by: Mihai Parparita <mihai@tailscale.com>	2 years ago
Will Norris	a1d9f65354	ipn,log: add logger for sockstat deltas Signed-off-by: Will Norris <will@tailscale.com> Co-authored-by: Melanie Warrick <warrick@tailscale.com>	2 years ago
Maisem Ali	5e8a80b845	all: replace /kb/ links with /s/ equivalents Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 years ago
Andrew Dunham	83fa17d26c	various: pass logger.Logf through to more places Updates #7537 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: Id89acab70ea678c8c7ff0f44792d54c7223337c6	2 years ago
Mihai Parparita	b64d78d58f	sockstats: refactor validation to be opt-in Followup to #7499 to make validation a separate function ( GetWithValidation vs. Get). This way callers that don't need it don't pay the cost of a syscall per active TCP socket. Also clears the conn on close, so that we don't double-count the stats. Also more consistently uses Go doc comments for the exported API of the sockstats package. Updates tailscale/corp#9230 Updates #3363 Signed-off-by: Mihai Parparita <mihai@tailscale.com>	2 years ago
Mihai Parparita	ea81bffdeb	sockstats: export as client metrics Though not fine-grained enough to be useful for detailed analysis, we might as well export that we gather as client metrics too, since we have an upload/analysis pipeline for them. clientmetric.Metric.Add is an atomic add, so it's pretty cheap to also do per-packet. Updates tailscale/corp#9230 Updates #3363 Signed-off-by: Mihai Parparita <mihai@tailscale.com>	2 years ago
Mihai Parparita	4c2f67a1d0	net/sockstat: fix per-interface statistics not always being available withSockStats may be called before setLinkMonitor, in which case we don't have a populated knownInterfaces map. Since we pre-populate the per-interface counters at creation time, we would end up with an empty map. To mitigate this, we do an on-demand request for the list of interfaces. This would most often happen with the logtail instrumentation, since we initialize it very early on. Updates tailscale/corp#9230 Signed-off-by: Mihai Parparita <mihai@tailscale.com>	2 years ago
Mihai Parparita	f4f8ed98d9	sockstats: add validation for TCP socket stats We can use the TCP_CONNECTION_INFO getsockopt() on Darwin to get OS-collected tx/rx bytes for TCP sockets. Since this API is not available for UDP sockets (or on Linux/Android), we can't rely on it for actual stats gathering. However, we can use it to validate the stats that we collect ourselves using read/write hooks, so that we can be more confident in them. We do need additional hooks from the Go standard library (added in tailscale/go#59) to be able to collect them. Updates tailscale/corp#9230 Updates #3363 Signed-off-by: Mihai Parparita <mihai@tailscale.com>	2 years ago
Mihai Parparita	6ac6ddbb47	sockstats: switch label to enum Makes it cheaper/simpler to persist values, and encourages reuse of labels as opposed to generating an arbitrary number. Updates tailscale/corp#9230 Updates #3363 Signed-off-by: Mihai Parparita <mihai@tailscale.com>	2 years ago
Aaron Klotz	9687f3700d	net/dns: deal with Windows wsl.exe hangs Despite the fact that WSL configuration is still disabled by default, we continue to log the machine's list of WSL distros as a diagnostic measure. Unfortunately I have seen the "wsl.exe -l" command hang indefinitely. This patch adds a (more than reasonable) 10s timeout to ensure that tailscaled does not get stuck while executing this operation. I also modified the Windows implementation of NewOSConfigurator to do the logging asynchronously, since that information is not required in order to continue starting up. Fixes #7476 Signed-off-by: Aaron Klotz <aaron@tailscale.com>	2 years ago
David Crawshaw	96a555fc5a	net/socks5: add password auth support Conforms to RFC 1929. To support Java HTTP clients via libtailscale, who offer no other reliable hooks into their sockets. Signed-off-by: David Crawshaw <crawshaw@tailscale.com>	2 years ago
Andrew Dunham	f6cd24499b	net/portmapper: relax source port check for UPnP responses Per a packet capture provided, some gateways will reply to a UPnP discovery packet with a UDP packet with a source port that does not come from the UPnP port. Accept these packets with a log message. Updates #7377 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I5d4d5b2a0275009ed60f15c20b484fe2025d094b	2 years ago
Andrew Dunham	51eb0b2cb7	net/portmapper: send UPnP protocol in upper-case We were previously sending a lower-case "udp" protocol, whereas other implementations like miniupnp send an upper-case "UDP" protocol. For compatibility, use an upper-case protocol instead. Updates #7377 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I4aed204f94e4d51b7a256d29917af1536cb1b70f	2 years ago
Andrew Dunham	d379a25ae4	net/portmapper: don't pick external ports below 1024 Some devices don't let you UPnP portmap a port below 1024, so let's just avoid that range of ports entirely. Updates #7377 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: Ib7603b1c9a019162cdc4fa21744a2cae48bb1d86	2 years ago
Maisem Ali	1a30b2d73f	all: use tstest.Replace more Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 years ago
Andrew Dunham	2d3ae485e3	net/interfaces: add better test for LikelyHomeRouterIP Return a mock set of interfaces and a mock gateway during this test and verify that LikelyHomeRouterIP returns the outcome we expect. Also verify that we return an error if there are no IPv4 addresses available. Follow-up to #7447 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I8f06989e7f1f0bebd108861cbff17b820ed2e6e4	2 years ago
Maisem Ali	b9ebf7cf14	tstest: add method to Replace values for tests We have many function pointers that we replace for the duration of test and restore it on test completion, add method to do that. Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 years ago
Andrew Dunham	12100320d2	net/interfaces: always return an IPv4 LikelyHomeRouterIP We weren't filtering out IPv6 addresses from this function, so we could be returning an IPv4 gateway IP and an IPv6 self IP. Per the function comments, only return IPv4 addresses for the self IP. Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: If19a4aadc343fbd4383fc5290befa0eff006799e	2 years ago
Andrew Dunham	73fa7dd7af	util/slicesx: add package for generic slice functions, use Now that we're using rand.Shuffle in a few locations, create a generic shuffle function and use it instead. While we're at it, move the interleaveSlices function to the same package for use. Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I0b00920e5b3eea846b6cedc30bd34d978a049fd3	2 years ago
Andrew Dunham	3f8e8b04fd	cmd/tailscale, cmd/tailscaled: move portmapper debugging into tailscale CLI The debug flag on tailscaled isn't available in the macOS App Store build, since we don't have a tailscaled binary; move it to the 'tailscale debug' CLI that is available on all platforms instead, accessed over LocalAPI. Updates #7377 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I47bffe4461e036fab577c2e51e173f4003592ff7	2 years ago
Mihai Parparita	3e71e0ef68	net/sockstats: remove explicit dependency on wgengine/monitor Followup to #7177 to avoid adding extra dependencies to the CLI. We instead declare an interface for the link monitor. Signed-off-by: Mihai Parparita <mihai@tailscale.com>	2 years ago
Andrew Dunham	27575cd52d	net/dnsfallback: shuffle returned IPs This ensures that we're trying multiple returned IPs, since the DERP servers return the same response to all queries. This should increase the chances that we eventually reach a working IP. Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: Ie8d4fb93df96da910fae49ae71bf3e402b9fdecc	2 years ago
Mihai Parparita	9cb332f0e2	sockstats: instrument networking code paths Uses the hooks added by tailscale/go#45 to instrument the reads and writes on the major code paths that do network I/O in the client. The convention is to use "<package>.<type>:<label>" as the annotation for the responsible code path. Enabled on iOS, macOS and Android only, since mobile platforms are the ones we're most interested in, and we are less sensitive to any throughput degradation due to the per-I/O callback overhead (macOS is also enabled for ease of testing during development). For now just exposed as counters on a /v0/sockstats PeerAPI endpoint. We also keep track of the current interface so that we can break out the stats by interface. Updates tailscale/corp#9230 Updates #3363 Signed-off-by: Mihai Parparita <mihai@tailscale.com>	2 years ago
Mihai Parparita	780c56e119	ipn/ipnlocal: add delegated interface information to /interfaces PeerAPI handler Exposes the delegated interface data added by #7248 in the debug endpoint. I would have found it useful when working on that PR, and it may be handy in the future as well. Also makes the interfaces table slightly easier to parse by adding borders to it. To make then nicer-looking, the CSP was relaxed to allow inline styles. Signed-off-by: Mihai Parparita <mihai@tailscale.com>	2 years ago
David Anderson	8b2ae47c31	version: unexport all vars, turn Short/Long into funcs The other formerly exported values aren't used outside the package, so just unexport them. Signed-off-by: David Anderson <danderson@tailscale.com>	2 years ago
Mihai Parparita	fa932fefe7	net/interfaces: redo how we get the default interface on macOS and iOS With #6566 we added an external mechanism for getting the default interface, and used it on macOS and iOS (see tailscale/corp#8201). The goal was to be able to get the default physical interface even when using an exit node (in which case the routing table would say that the Tailscale utun* interface is the default). However, the external mechanism turns out to be unreliable in some cases, e.g. when multiple cellular interfaces are present/toggled (I have occasionally gotten my phone into a state where it reports the pdp_ip1 interface as the default, even though it can't actually route traffic). It was observed that `ifconfig -v` on macOS reports an "effective interface" for the Tailscale utn* interface, which seems promising. By examining the ifconfig source code, it turns out that this is done via a SIOCGIFDELEGATE ioctl syscall. Though this is a private API, it appears to have been around for a long time (e.g. it's in the 10.13 xnu release at https://opensource.apple.com/source/xnu/xnu-4570.41.2/bsd/net/if_types.h.auto.html) and thus is unlikely to go away. We can thus use this ioctl if the routing table says that a utun* interface is the default, and go back to the simpler mechanism that we had before #6566. Updates #7184 Updates #7188 Signed-off-by: Mihai Parparita <mihai@tailscale.com>	2 years ago
Mihai Parparita	21fda7f670	net/routetable: include unknown flags in the routetable doctor output As part of the work on #7248 I wanted to know all of the flags on the RouteMessage struct that we get back from macOS. Though it doesn't turn out to be useful (when using an exit node/Tailscale is the default route, the flags for the physical interface routes are the same), it still seems useful from a debugging/comprehensiveness perspective. Adds additional Darwin flags that were output once I enabled this mode. Signed-off-by: Mihai Parparita <mihai@tailscale.com>	2 years ago
Tom DNetto	2ca6dd1f1d	wgengine: start logging DISCO frames to pcap stream Signed-off-by: Tom DNetto <tom@tailscale.com>	2 years ago
Colin Adler	3c107ff301	net/connstats: fix ticker in NewStatistics (#7225 ) `:=` was accidentally used, so `maxPeriod` never worked. Signed-off-by: Colin Adler <colin1adler@gmail.com>	2 years ago
Mihai Parparita	62f4df3257	net/interfaces, net/netns: add node attributes to control default interface getting and binding With #6566 we started to more aggressively bind to the default interface on Darwin. We are seeing some reports of the wrong cellular interface being chosen on iOS. To help with the investigation, this adds to knobs to control the behavior changes: - CapabilityDebugDisableAlternateDefaultRouteInterface disables the alternate function that we use to get the default interface on macOS and iOS (implemented in tailscale/corp#8201). We still log what it would have returned so we can see if it gets things wrong. - CapabilityDebugDisableBindConnToInterface is a bigger hammer that disables binding of connections to the default interface altogether. Updates #7184 Updates #7188 Signed-off-by: Mihai Parparita <mihai@tailscale.com>	2 years ago
Brad Fitzpatrick	2477fc4952	net/netutil: only check Linux sysctls w/ procfs, assume absent means false Fixes #7217 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Tom DNetto	99b9d7a621	all: implement pcap streaming for datapath debugging Updates: tailscale/corp#8470 Signed-off-by: Tom DNetto <tom@tailscale.com>	2 years ago
Mihai Parparita	0e3fb91a39	net/dns/resolver: remove maxDoHInFlight It was originally added to control memory use on iOS (#2490), but then was relaxed conditionally when running on iOS 15 (#3098). Now that we require iOS 15, there's no need for the limit at all, so simplify back to the original state. Signed-off-by: Mihai Parparita <mihai@tailscale.com>	2 years ago
Mihai Parparita	b6908181ff	net/tshttpproxy: more directly use Transport proxy CONNECT hooks GetProxyConnectHeader (golang/go#41048) was upstreamed in Go 1.16 and OnProxyConnectResponse (golang/go#54299) in Go 1.20, thus we no longer need to guard their use by the tailscale_go build tag. Updates #7123 Signed-off-by: Mihai Parparita <mihai@tailscale.com>	2 years ago
Andrew Dunham	880a41bfcc	net/dns/resolver: add envknob to debug exit node DNS queries on on Windows Add the envknob TS_DEBUG_EXIT_NODE_DNS_NET_PKG, which enables more verbose debug logging when calling the handleExitNodeDNSQueryWithNetPkg function. This function is currently only called on Windows and Android. Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: Ieb3ca7b98837d7dc69cd9ca47609c1c52e3afd7b	2 years ago
Brad Fitzpatrick	03645f0c27	net/{netns,netstat}: use new x/sys/cpu.IsBigEndian See golang/go#57237 Change-Id: If47ab6de7c1610998a5808e945c4177c561eab45 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Andrew Dunham	2755f3843c	health, net/tlsdial: add healthcheck for self-signed cert When we make a connection to a server, we previously would verify with the system roots, and then fall back to verifying with our baked-in Let's Encrypt root if the system root cert verification failed. We now explicitly check for, and log a health error on, self-signed certificates. Additionally, we now always verify against our baked-in Let's Encrypt root certificate and log an error if that isn't successful. We don't consider this a health failure, since if we ever change our server certificate issuer in the future older non-updated versions of Tailscale will no longer be healthy despite being able to connect. Updates #3198 Change-Id: I00be5ceb8afee544ee795e3c7a2815476abc4abf Signed-off-by: Andrew Dunham <andrew@du.nham.ca>	2 years ago
Brad Fitzpatrick	cf8dd7aa09	all: use Go 1.20's bytes.Clone Updates #7123 Updates #6257 (more to do in other repos) Change-Id: I073e2a6d81a5d7fbecc29caddb7e057ff65239d0 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	b1248442c3	all: update to Go 1.20, use strings.CutPrefix/Suffix instead of our fork Updates #7123 Updates #5309 Change-Id: I90bcd87a2fb85a91834a0dd4be6e03db08438672 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Maisem Ali	5bba65e978	net/memnet: rename from net/nettest This is just #cleanup to resolve a TODO Also add a package doc. Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 years ago
Will Norris	947c14793a	all: update tools that manage copyright headers Update all code generation tools, and those that check for license headers to use the new standard header. Also update copyright statement in LICENSE file. Fixes #6865 Signed-off-by: Will Norris <will@tailscale.com>	2 years ago
Will Norris	71029cea2d	all: update copyright and license headers This updates all source files to use a new standard header for copyright and license declaration. Notably, copyright no longer includes a date, and we now use the standard SPDX-License-Identifier header. This commit was done almost entirely mechanically with perl, and then some minimal manual fixes. Updates #6865 Signed-off-by: Will Norris <will@tailscale.com>	2 years ago

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782 Commits (8ac5976897376cdad935f575389b62aff56ba6c2)