tailscale

Commit Graph

Author	SHA1	Message	Date
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>	6 months ago
Andrew Dunham	e33bc64cff	net/dnsfallback: add singleflight to recursive resolver This prevents running more than one recursive resolution for the same hostname in parallel, which can use excessive amounts of CPU when called in a tight loop. Additionally, add tests that hit the network (when run with a flag) to test the lookup behaviour. Updates tailscale/corp#15261 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I39351e1d2a8782dd4c52cb04b3bd982eb651c81e	12 months ago
Brad Fitzpatrick	95faefd1f6	net/dnsfallback: disable recursive resolver for now It seems to be implicated in a CPU consumption bug that's not yet understood. Disable it until we understand. Updates tailscale/corp#15261 Change-Id: Ia6d0c310da6464dda79a70fc3c18be0782812d3f Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	1 year ago
James Tucker	e03f0d5f5c	net/dnsfallback: remove net/dnsfallback go:generate line We should be able to freely run `./tool/go generate ./...`, but we're continually dodging this particular generator. Instead of constantly dodging it, let's just remove it. Updates #cleanup Signed-off-by: James Tucker <james@tailscale.com>	1 year ago
James Tucker	84acf83019	go.mod,net/dnsfallback: bump go4.org/netipx Updates #8043 Signed-off-by: James Tucker <james@tailscale.com>	1 year 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>	1 year ago
David Anderson	52212f4323	all: update exp/slices and fix call sites slices.SortFunc suffered a late-in-cycle API breakage. Updates #cleanup Signed-off-by: David Anderson <danderson@tailscale.com>	1 year ago
Andrew Dunham	a7648a6723	net/dnsfallback: run recursive resolver and compare results When performing a fallback DNS query, run the recursive resolver in a separate goroutine and compare the results returned by the recursive resolver with the results we get from "regular" bootstrap DNS. This will allow us to gather data about whether the recursive DNS resolver works better, worse, or about the same as "regular" bootstrap DNS. Updates #5853 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: Ifa0b0cc9eeb0dccd6f7a3d91675fe44b3b34bd48	1 year ago
Mihai Parparita	7330aa593e	all: avoid repeated default interface lookups On some platforms (notably macOS and iOS) we look up the default interface to bind outgoing connections to. This is both duplicated work and results in logspam when the default interface is not available (i.e. when a phone has no connectivity, we log an error and thus cause more things that we will try to upload and fail). Fixed by passing around a netmon.Monitor to more places, so that we can use its cached interface state. Fixes #7850 Updates #7621 Signed-off-by: Mihai Parparita <mihai@tailscale.com>	2 years ago
Mihai Parparita	9a655a1d58	net/dnsfallback: more explicitly pass through logf function Redoes the approach from #5550 and #7539 to explicitly pass in the logf function, instead of having global state that can be overridden. Signed-off-by: Mihai Parparita <mihai@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
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	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
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
Andrew Dunham	f52a659076	net/dnsfallback: allow setting log function (#5550 ) This broke a test in corp that enforces we don't use the log package. Signed-off-by: Andrew Dunham <andrew@tailscale.com>	2 years ago
Andrew Dunham	b8596f2a2f	net/dnsfallback: cache most recent DERP map on disk (#5545 ) This is especially helpful as we launch newer DERPs over time, and older clients have progressively out-of-date static DERP maps baked in. After this, as long as the client has successfully connected once, it'll cache the most recent DERP map it knows about. Resolves an in-code comment from @bradfitz 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	6a396731eb	all: use various net/netip parse funcs directly Mechanical change with perl+goimports. Changed {Must,}Parse{IP,IPPrefix,IPPort} to their netip variants, then goimports -d . Finally, removed the net/netaddr wrappers, to prevent future use. Updates #5162 Change-Id: I59c0e38b5fbca5a935d701645789cddf3d7863ad 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
Brad Fitzpatrick	a49d8d5200	Revert ".github/workflows: work around golang/go#51629" This reverts commit `2a412ac9ee`. Updates #4194 Change-Id: I0098b66b71d20bea301ca79058c1cdd201237dd0 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Maisem Ali	b2f269d5b7	net/dnsfallback: do not attempt lookups of IPs. Currently if the passed in host is an IP, Lookup still attempts to resolve it with a dns server. This makes it just return the IP directly. Updates tailscale/corp#4475 Signed-off-by: Maisem Ali <maisem@tailscale.com>	3 years ago
David Anderson	2a412ac9ee	.github/workflows: work around golang/go#51629 Incidentally, simplify the go generate CI workflow, by marking the dnsfallback update non-hermetic (so CI will skip it) rather than manually filter it out of `go list`. Updates #4194 Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
Josh Bleecher Snyder	758c37b83d	net/netns: thread logf into control functions So that darwin can log there without panicking during tests. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Brad Fitzpatrick	7cf8ec8108	net/tlsdial: bake in LetsEncrypt's ISRG Root X1 root We still try the host's x509 roots first, but if that fails (like if the host is old), we fall back to using LetsEncrypt's root and retrying with that. tlsdial was used in the three main places: logs, control, DERP. But it was missing in dnsfallback. So added it there too, so we can run fine now on a machine with no DNS config and no root CAs configured. Also, move SSLKEYLOGFILE support out of DERP. tlsdial is the logical place for that support. Fixes #1609 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
David Crawshaw	d6f4b5f5cb	ipn, etc: use controlplane.tailscale.com Signed-off-by: David Crawshaw <crawshaw@tailscale.com>	3 years ago
Brad Fitzpatrick	10d7c2583c	net/dnsfallback: don't depend on derpmap.Prod Move derpmap.Prod to a static JSON file (go:generate'd) instead, to make its role explicit. And add a TODO about making dnsfallback use an update-over-time DERP map file instead of a baked-in one. Updates #1264 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	d37b3b02cd	net/dnsfallback: fix infinite loop and limit number of candidates Updates #1455 (fixes the DNS spin part, but other things aren't ideal there) Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	9df4185c94	control/controlclient, net/{dnscache,dnsfallback}: add DNS fallback mechanism Updates #1405 Updates #1403 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago

28 Commits (aadb8d9d21938110e34af35c28fe7324cef809e4)