tailscale

Commit Graph

Author	SHA1	Message	Date
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 weeks 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 weeks ago
Brad Fitzpatrick	c3c18027c6	all: make more tests pass/skip in airplane mode Updates tailscale/corp#19786 Change-Id: Iedc6730fe91c627b556bff5325bdbaf7bf79d8e6 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 weeks ago
Brad Fitzpatrick	6b95219e3a	net/netmon, add: add netmon.State type alias of interfaces.State ... in prep for merging the net/interfaces package into net/netmon. This is a no-op change that updates a bunch of the API signatures ahead of a future change to actually move things (and remove the type alias) Updates tailscale/corp#10910 Updates tailscale/corp#18960 Updates #7967 Updates #3299 Change-Id: I477613388f09389214db0d77ccf24a65bff2199c Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	1 month 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>	1 month 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>	1 month 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 months 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	6 months ago
James Tucker	de8e55fda6	net/netcheck,wgengine/magicsock: reduce coupling between netcheck and magicsock Netcheck no longer performs I/O itself, instead it makes requests via SendPacket and expects users to route reply traffic to ReceiveSTUNPacket. Netcheck gains a Standalone function that stands up sockets and goroutines to implement I/O when used in a standalone fashion. Magicsock now unconditionally routes STUN traffic to the netcheck.Client that it hosts, and plumbs the send packet sink. The CLI is updated to make use of the Standalone mode. Fixes #8723 Signed-off-by: James Tucker <james@tailscale.com>	10 months ago
Andrew Dunham	9b5e29761c	net/netcheck: ignore PreferredDERP changes that are small If the absolute value of the difference between the current PreferredDERP's latency and the best latency is <= 10ms, don't change it and instead prefer the previous value. This is in addition to the existing hysteresis that tries to remain on the previous DERP region if the relative improvement is small, but handles nodes that have low latency to >1 DERP region better. Updates #8603 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I1e34c94178f8c9a68a69921c5bc0227337514c70	11 months ago
Andrew Dunham	7aba0b0d78	net/netcheck, tailcfg: add DERPHomeParams and use it This allows providing additional information to the client about how to select a home DERP region, such as preferring a given DERP region over all others. Updates #8603 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I7c4a270f31d8585112fab5408799ffba5b75266f	11 months ago
James Tucker	da90fab899	net/netcheck: reenable TestBasic on Windows This test was either fixed by intermediate changes or was mis-flagged as failing during #7876 triage. Updates #7876 Signed-off-by: James Tucker <jftucker@gmail.com>	1 year ago
James Tucker	c5150eae67	net/netcheck: reenable TestNodeAddrResolve on Windows Updates #7876 Co-authored-by: Andrew Dunham <andrew@du.nham.ca> Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Signed-off-by: James Tucker <james@tailscale.com> Change-Id: Idb2e6cc2edf6ca123b751d6c8f8729b0cba86023	1 year ago
James Tucker	8dec1a8724	.github/workflows: reenable Windows CI, disable broken tests We accidentally switched to ./tool/go in `4022796484` which resulted in no longer running Windows builds, as this is attempting to run a bash script. I was unable to quickly fix the various tests that have regressed, so instead I've added skips referencing #7876, which we need to back and fix. Updates #7262 Updates #7876 Signed-off-by: James Tucker <james@tailscale.com>	1 year ago
Andrew Dunham	228d0c6aea	net/netcheck: use dnscache.Resolver when resolving DERP IPs This also adds a bunch of tests for this function to ensure that we're returning the proper IP(s) in all cases. Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I0d9d57170dbab5f2bf07abdf78ecd17e0e635399	1 year 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>	1 year 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>	1 year 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>	1 year 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>	1 year ago
Andrew Dunham	c6162c2a94	net/netcheck: add check for captive portal (#5593 ) This doesn't change any behaviour for now, other than maybe running a full netcheck more often. The intent is to start gathering data on captive portals, and additionally, seeing this in the 'tailscale netcheck' command should provide a bit of additional information to users. Updates #1634 Change-Id: I6ba08f9c584dc0200619fa97f9fde1a319f25c76 Signed-off-by: Andrew Dunham <andrew@du.nham.ca>	2 years ago
Brad Fitzpatrick	ec9d13bce5	hostinfo, net/netcheck: use CutPrefix Updates #5309 Change-Id: I37e594cfd245784bf810c493de68a66d3ff20677 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Andrew Dunham	f0d6f173c9	net/netcheck: try ICMP if UDP is blocked (#5056 ) Signed-off-by: Andrew Dunham <andrew@du.nham.ca>	2 years ago
Brad Fitzpatrick	a12aad6b47	all: convert more code to use net/netip directly perl -i -npe 's,netaddr.IPPrefixFrom,netip.PrefixFrom,' $(git grep -l -F netaddr.) perl -i -npe 's,netaddr.IPPortFrom,netip.AddrPortFrom,' $(git grep -l -F netaddr. ) perl -i -npe 's,netaddr.IPPrefix,netip.Prefix,g' $(git grep -l -F netaddr. ) perl -i -npe 's,netaddr.IPPort,netip.AddrPort,g' $(git grep -l -F netaddr. ) perl -i -npe 's,netaddr.IP\b,netip.Addr,g' $(git grep -l -F netaddr. ) perl -i -npe 's,netaddr.IPv6Raw\b,netip.AddrFrom16,g' $(git grep -l -F netaddr. ) goimports -w . Then delete some stuff from the net/netaddr shim package which is no longer neeed. Updates #5162 Change-Id: Ia7a86893fe21c7e3ee1ec823e8aba288d4566cd8 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	7eaf5e509f	net/netaddr: start migrating to net/netip via new netaddr adapter package Updates #5162 Change-Id: Id7bdec303b25471f69d542f8ce43805328d56c12 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
David Anderson	c1cb3efbba	net/netcheck: test for OS IPv6 support as well as connectivity. This lets us distinguish "no IPv6 because the device's ISP doesn't offer IPv6" from "IPv6 is unavailable/disabled in the OS". Signed-off-by: David Anderson <danderson@tailscale.com>	2 years ago
Josh Bleecher Snyder	0868329936	all: use any instead of interface{} My favorite part of generics. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	2 years ago
Avery Pennarun	0d4a0bf60e	magicsock: if STUN failed to send before, rebind before STUNning again. On iOS (and possibly other platforms), sometimes our UDP socket would get stuck in a state where it was bound to an invalid interface (or no interface) after a network reconfiguration. We can detect this by actually checking the error codes from sending our STUN packets. If we completely fail to send any STUN packets, we know something is very broken. So on the next STUN attempt, let's rebind the UDP socket to try to correct any problems. This fixes a problem where iOS would sometimes get stuck using DERP instead of direct connections until the backend was restarted. Fixes #2994 Signed-off-by: Avery Pennarun <apenwarr@tailscale.com>	3 years ago
Brad Fitzpatrick	1ae35b6c59	net/{interfaces,netcheck}: rename some fields, funcs Split out of Denton's #2164, to make that diff smaller to review. This change has no behavior changes. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	c6358f2247	net/netcheck: add a few more STUN retries for prior DERP home For #1310, maybe. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Denton Gentry	ac42757cd7	netcheck: use reflect in sortRegions test. Signed-off-by: Denton Gentry <dgentry@tailscale.com>	3 years ago
Denton Gentry	43e060b0e5	netcheck: test sortRegions Signed-off-by: Denton Gentry <dgentry@tailscale.com>	3 years ago
Brad Fitzpatrick	676b5b7946	net/netcheck: improve the preferred DERP hysteresis Users in Amsterdam (as one example) were flipping back and forth between equidistant London & Frankfurt relays too much. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	053a1d1340	all: annotate log verbosity levels on most egregiously spammy log prints Fixes #924 Fixes #282 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	7ac91c15bd	net/netcheck: fix tests on Windows Updates #50	4 years ago
Brad Fitzpatrick	5c6d8e3053	netcheck, tailcfg, interfaces, magicsock: survey UPnP, NAT-PMP, PCP Don't do anything with UPnP, NAT-PMP, PCP yet, but see how common they are in the wild. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	2d6e84e19e	net/netcheck, wgengine/magicsock: replace more UDPAddr with netaddr.IPPort	4 years ago
Brad Fitzpatrick	deb113838e	net/netcheck: use logger.ArgWriter in logConciseReport, fix comma bug, add tests	4 years ago
Brad Fitzpatrick	becce82246	net/netns, misc tests: remove TestOnlySkipPrivilegedOps, argv checks The netns UID check is sufficient for now. We can do something else later if/when needed.	4 years ago
David Anderson	5114df415e	net/netns: set the bypass socket mark on linux. This allows tailscaled's own traffic to bypass Tailscale-managed routes, so that things like tailscale-provided default routes don't break tailscaled itself. Progress on #144. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
Brad Fitzpatrick	0245bbe97b	Make netcheck handle v6-only interfaces better, faster. Also: * add -verbose flag to cmd/tailscale netcheck * remove some API from the interfaces package * convert some of the interfaces package to netaddr.IP * don't even send IPv4 probes on machines with no IPv4 (or only v4 loopback) * and once three regions have replied, stop waiting for other probes at 2x the slowest duration. Updates #376	4 years ago
Avery Pennarun	7cd9ff3dde	net/netcheck: fix race condition initializting RegionLatency maps. Under some conditions, code would try to look things up in the maps before the first call to updateLatency. I don't see any reason to delay initialization of the maps, so let's just init them right away when creating the Report instance. Signed-off-by: Avery Pennarun <apenwarr@tailscale.com>	4 years ago
Brad Fitzpatrick	b0c10fa610	stun, netcheck: move under net	4 years ago

42 Commits (main)