582 Commits (567c5a6d9e6dabf042eadc83e0779b2f00055743)

Author	SHA1	Message	Date
David Anderson	3fdae12f0c	wgengine/filter: eliminate unnecessary memory loads. ... Doesn't materially affect benchmarks, but shrinks match6 by 30 instructions and halves memory loads. Part of #19. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
Josh Bleecher Snyder	47380ebcfb	wgengine/filter: twiddle bits to optimize ... Part of #19. name old time/op new time/op delta Filter/icmp4-8 32.2ns ± 3% 32.5ns ± 2% ~ (p=0.524 n=10+8) Filter/icmp6-8 49.7ns ± 6% 43.1ns ± 4% -13.12% (p=0.000 n=9+10) Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	5062131aad	wgengine/filter: treat * as both a v4 and v6 wildcard. ... Part of #19. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	2d604b3791	net/packet: represent IP6 as two uint64s. ... For the operations we perform on these types (mostly net6.Contains), this encoding is much faster. Part of #19. name old time/op new time/op delta Filter/icmp4-8 27.5ns ± 1% 28.0ns ± 2% +1.89% (p=0.016 n=5+5) Filter/tcp4_syn_in-8 38.8ns ± 2% 38.3ns ± 1% -1.24% (p=0.024 n=5+5) Filter/tcp4_syn_out-8 27.6ns ±12% 24.6ns ± 1% ~ (p=0.063 n=5+5) Filter/udp4_in-8 71.5ns ± 5% 65.9ns ± 1% -7.94% (p=0.008 n=5+5) Filter/udp4_out-8 132ns ±13% 119ns ± 1% -10.29% (p=0.008 n=5+5) Filter/icmp6-8 169ns ±10% 54ns ± 1% -68.35% (p=0.008 n=5+5) Filter/tcp6_syn_in-8 149ns ± 6% 43ns ± 1% -71.11% (p=0.008 n=5+5) Filter/tcp6_syn_out-8 37.7ns ± 4% 24.3ns ± 3% -35.51% (p=0.008 n=5+5) Filter/udp6_in-8 179ns ± 5% 103ns ± 1% -42.75% (p=0.008 n=5+5) Filter/udp6_out-8 156ns ± 3% 191ns ± 1% +22.54% (p=0.008 n=5+5) Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	04ff3c91ee	wgengine/filter: add full IPv6 support. ... Part of #19. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	a664aac877	wgengine/router: disable IPv6 if v6 policy routing is unavailable. ... Fixes #895. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
Brad Fitzpatrick	19b0cfe89e	all: prepare for GOOS=ios in Go 1.16 ... Work with either way for now on iOS (darwin/arm64 vs ios/arm64). In February when Go 1.16 comes out we'll have a universal binary for darwin/arm64 (macOS) and will drop support for Go 1.15 and its darwin/amd64 meaning iOS. (it'll mean macOS). Context: * https://tip.golang.org/doc/go1.16#darwin * https://github.com/golang/go/issues/38485 * https://github.com/golang/go/issues/42100	4 years ago
David Anderson	c2cc3acbaf	net/packet: remove NewIP, offer only a netaddr constructor. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	55b1221db2	net/packet: support full IPv6 decoding. ... The packet filter still rejects all IPv6, but decodes enough from v6 packets to do something smarter in a followup. name time/op Decode/tcp4-8 28.8ns ± 2% Decode/tcp6-8 20.6ns ± 1% Decode/udp4-8 28.2ns ± 1% Decode/udp6-8 20.0ns ± 6% Decode/icmp4-8 21.7ns ± 2% Decode/icmp6-8 14.1ns ± 2% Decode/unknown-8 9.43ns ± 2% Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	89894c6930	net/packet: add IPv6 source and destination IPs to Parsed. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
Brad Fitzpatrick	450cfedeba	wgengine/magicsock: quiet an IPv6 warning in tests ... In tests, we force binding to localhost to avoid OS firewall warning dialogs. But for IPv6, we were trying (and failing) to bind to 127.0.0.1. You'd think we'd just say "localhost", but that's apparently ill defined. See https://tools.ietf.org/html/draft-ietf-dnsop-let-localhost-be-localhost and golang/go#22826. (It's bitten me in the past, but I can't remember specific bugs.) So use "::1" explicitly for "udp6", which makes the test quieter.	4 years ago
David Anderson	093431f5dd	net/packet: s/ParsedPacket/Parsed/ to avoid package stuttering. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	c48253e63b	wgengine/filter: add a method to run the packet filter without a packet. ... The goal is to move some of the shenanigans we have elsewhere into the filter package, so that all the weird things to do with poking at the filter is in a single place, behind clean APIs. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	7a54910990	wgengine/filter: remove helper vars, mark NewAllowAll test-only. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	76d99cf01a	wgengine/filter: remove the Matches type. ... It only served to obscure the underlying slice type without adding much value. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	b950bd60bf	wgengine/filter: add and clean up documentation. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	a8589636a8	wgengine/filter: remove unused Clone methods. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	b3634f020d	wgengine/filter: use netaddr types in public API. ... We still use the packet.* alloc-free types in the data path, but the compilation from netaddr to packet happens within the filter package. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	427bf2134f	net/packet: rename from wgengine/packet. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	19df6a2ee2	wgengine/packet: rename types to reflect their v4-only-ness, document. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	ebd96bf4a9	wgengine/router/dns: use OpenKeyWait to set DNS configuration. ... Fixes tailscale/corp#839. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
Brad Fitzpatrick	119101962c	wgengine/router: don't double-prefix dns log messages [Windows]	4 years ago
Brad Fitzpatrick	28f6552646	wgengine/router/dns: run ipconfig /registerdns async, log timing ... Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	01ee638cca	Change some os.IsNotExist to errors.Is(err, os.ErrNotExist) for non-os errors. ... os.IsNotExist doesn't unwrap errors. errors.Is does. The ioutil.ReadFile ones happened to be fine but I changed them so we're consistent with the rule: if the error comes from os, you can use os.IsNotExist, but from any other package, use errors.Is. (errors.Is always would also work, but not worth updating all the code) The motivation here was that we were logging about failure to migrate legacy relay node prefs file on startup, even though the code tried to avoid that. See golang/go#41122	4 years ago
David Anderson	68ddf134d7	wgengine/router/dns: issue ipconfig /registerdns when applying DNS settings. ... Amazingly, there doesn't seem to be a documented way of updating network configuration programmatically in a way that Windows takes notice of. The naturopathic remedy for this is to invoke ipconfig /registerdns, which does a variety of harmless things and also invokes the private API that tells windows to notice new adapter settings. This makes our DNS config changes stick within a few seconds of us setting them. If we're invoking a shell command anyway, why futz with the registry at all? Because netsh has no command for changing the DNS suffix list, and its commands for setting resolvers requires parsing its output and keeping track of which server is in what index. Amazingly, twiddling the registry directly is the less painful option. Fixes #853. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
Brad Fitzpatrick	508f5c3ae0	wgengine/router: fix bug where getInterfaceRoutes always returned an empty list ... Regression from f2ce64f0c6 (r43710860) Fixes #870	4 years ago
Brad Fitzpatrick	38bde61b3d	wgengine/router: make Windows firewall configuration async ... Updating the Windows firewall is usually reasonably fast, but sometimes blocks for 20 seconds, 4 minutes, etc. Not sure why. Until we understand that's happening, configure it in the background without blocking the normal control flow. Updates #785 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	fd2a30cd32	wgengine/magicsock: make test pass on Windows and without firewall dialog box ... Updates #50	4 years ago
Brad Fitzpatrick	ac866054c7	wgengine/magicsock: add a backoff on DERP reconnects ... Fixes #808	4 years ago
Brad Fitzpatrick	86c271caba	types/logger: move RusagePrefixLog to logger package, disable by default ... The RusagePrefixLog is rarely useful, hasn't been useful in a long time, is rarely the measurement we need, and is pretty spammy (and syscall-heavy). Disable it by default. We can enable it when we're debugging memory.	4 years ago
David Anderson	ff0cf6340a	wgengine/router: fix configuration of loopback netfilter rules for v6. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
Brad Fitzpatrick	105a820622	wgengine/magicsock: skip an endpoint update at start-up ... At startup the client doesn't yet have the DERP map so can't do STUN queries against DERP servers, so it only knows it local interface addresses, not its STUN-mapped addresses. We were reporting the interface-local addresses to control, getting the DERP map, and then immediately reporting the full set of updates. That was an extra HTTP request to control, but worse: it was an extra broadcast from control out to all the peers in the network. Now, skip the initial update if there are no stun results and we don't have a DERP map. More work remains optimizing start-up requests/map updates, but this is a start. Updates tailscale/corp#557	4 years ago
Brad Fitzpatrick	746f03669c	wgengine: fix lazy wireguard config bug when disco keys change ... There was a bug with the lazy wireguard config code where, if the minimum set of peers to tell wireguard didn't change, we skipped calling userspaceEngine.updateActivityMapsLocked which updated the various data structures that matched incoming traffic to later reconfigure the minimum config. That meant if an idle peer restarted and changed discovery keys, we skipped updating our maps of disco keys/IPs that would caused us to lazily inflate the config for that peer later if/when it did send traffic.	4 years ago
Brad Fitzpatrick	2076a50862	wgengine/magicsock: finish a comment sentence that ended prematurely	4 years ago
Alex Brainman	f2ce64f0c6	wgengine/router: unfork winipcfg-go package, use upstream ... Use golang.zx2c4.com/wireguard/windows/tunnel/winipcfg instead of github.com/tailscale/winipcfg-go package. Updates #760 Signed-off-by: Alex Brainman <alex.brainman@gmail.com>	4 years ago
Brad Fitzpatrick	22c462bd91	wgengine/monitor: fix copy/paste-o to actually monitor route changes ... Due to a copy/paste-o, we were monitoring address changes twice, and not monitoring route changes at all. Verified with 'tailscale debug --monitor' that this actually works now (while running 'route add 10.3.0.0 mask 255.255.0.0 10.0.0.1' and 'route delete (same)' back and forth in cmd.exe) In practice route changes are accompanied by address changes and this doesn't fix any known issues. I just noticed this while reading this code again. But at least the code does what it was trying to do now.	4 years ago
Avery Pennarun	0e5f2b90a5	echoRespondToAll: filter.Accept rather than filter.Drop on a match. ... This function is only called in fake mode, which won't do anything more with the packet after we respond to it anyway, so dropping it in the prefilter is not necessary. And it's kinda semantically wrong: we did not reject it, so telling the upper layer that it was rejected produces an ugly error message. Signed-off-by: Avery Pennarun <apenwarr@tailscale.com>	4 years ago
Avery Pennarun	5041800ac6	wgengine/tstun/faketun: it's a null tunnel, not a loopback. ... At some point faketun got implemented as a loopback (put a packet in from wireguard, the same packet goes back to wireguard) which is not useful. It's supposed to be an interface that just sinks all packets, and then wgengine adds *only* and ICMP Echo responder as a layer on top. This caused extremely odd bugs on darwin, where the special case that reinjects packets from local->local was filling the loopback channel and creating an infinite loop (which became jammed since the reader and writer were in the same goroutine). Signed-off-by: Avery Pennarun <apenwarr@tailscale.com>	4 years ago
Brad Fitzpatrick	3e4c46259d	wgengine/magicsock: don't do netchecks either when network is down ... A continuation of 6ee219a25d Updates #640	4 years ago
Brad Fitzpatrick	6ee219a25d	ipn, wgengine, magicsock, tsdns: be quieter and less aggressive when offline ... If no interfaces are up, calm down and stop spamming so much. It was noticed as especially bad on Windows, but probably was bad everywhere. I just have the best network conditions testing on a Windows VM. Updates #604	4 years ago
Brad Fitzpatrick	587bdc4280	ipn, wgengine: disable subnet routes if network has PAC configuration ... Not configurable yet. Updates tailscale/corp#653 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
David Anderson	c493e5804f	wgengine/router: make v6-ness configurable in test, for consistent results. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
Brad Fitzpatrick	c86761cfd1	Remove tuntap references. We only use TUN.	4 years ago
Brad Fitzpatrick	01098f41d0	wgengine/tstun: fix typo in comment	4 years ago
Brad Fitzpatrick	73cc2d8f89	wgengine/filter: also silently drop link-local unicast traffic ... Updates #629	4 years ago
Brad Fitzpatrick	5f807c389e	wgengine/filter: drop multicast packets out, don't log about them ... Eventually we'll probably support multicast. For now it's just log spam. Fixes #629	4 years ago
Brad Fitzpatrick	bbb56f2303	wgengine/router: fix tests on Debian Buster as regular user on machine with IPv6	4 years ago
David Anderson	fddbcb0c7b	wgengine/router: support various degrees of broken IPv6. ... Gracefully skips touching the v6 NAT table on systems that don't have it, and doesn't configure IPv6 at all if IPv6 is globally disabled. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	0d80904fc2	wgengine/router: set up basic IPv6 routing/firewalling. ... Part of #19. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
Josh Bleecher Snyder	f0ef561049	wgengine/tsdns: use netns to obtain a socket ... Fixes #789 Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
Josh Bleecher Snyder	6e8328cba5	wgengine/tsdns: replace connections when net link changes (macOS) ... When the network link changes, existing UDP sockets fail immediately and permanently on macOS. The forwarder set up a single UDP conn and never changed it. As a result, any time there was a network link change, all forwarded DNS queries failed. To fix this, create a new connection when send requests fail because of network unreachability. This change is darwin-only, although extended it to other platforms should be straightforward. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
Josh Bleecher Snyder	1fd10061fd	wgengine/tsdns: delegate bonjour service rdns requests ... While we're here, parseQuery into a plain function. This is helpful for fuzzing. (Which I did a bit of. Didn't find anything.) And clean up a few minor things. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
Brad Fitzpatrick	2d0ed99672	wgengine, wgengine/router: add a bunch of (temporary?) engine creation logging ... Trying to debug what's slow on a user's machine. Updates #785	4 years ago
Brad Fitzpatrick	7c11f71ac5	wgengine/router: ignore errors deleting 169.254.255.255/32 route on Windows ... Updates #785	4 years ago
David Anderson	b7e0ff598a	wgengine: don't close tundev in NewUserspaceEngine. ... newUserspaceEngineAdvanced closes the tun device on error already. Fixes #783. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
Brad Fitzpatrick	5d8b88be88	control/controlclient, version/distro, wgengine: recognize OpenWrt ... And help out with missing packages. Thanks to @willangley for tips. Updates #724	4 years ago
Brad Fitzpatrick	3528d28ed1	wgengine/router: move Tailscale's winipcfg additions into wgengine/router ... Part of unforking our winipcfg-go and using upstream (#760), move our additions into our repo. (We might upstream them later if upstream has interest) Originally these were: @apenwarr: "Add ifc.SyncAddresses() and SyncRoutes()." 609dcf2df5 @bradfitz: "winipcfg: make Interface.AddRoutes do as much as possible, return combined error" e9f93d53f3 @bradfitz: "prevent unnecessary Interface.SyncAddresses work; normalize IPNets in deltaNets" decb9ee8e1	4 years ago
Brad Fitzpatrick	fd77268770	wgengine/router: enumerate all interfaces when finding Tailscale adapter by GUID ... Might fix it. I've spent too much time failing to reproduce the issue. This doesn't seem to make it worse, though (it still runs for me), so I'll include this and see if it helps others while I still work on a reliable way to reproduce it. Updates tailscale/corp#474	4 years ago
Brad Fitzpatrick	5bcac4eaac	net/tshttpproxy: add GetProxyForURL negative cache ... Otherwise when PAC server is down, we log, and each log entry is a new HTTP request (from logtail) and a new GetProxyForURL call, which again logs, non-stop. This is also nicer to the WinHTTP service. Then also hook up link change notifications to the cache to reset it if there's a chance the network might work sooner.	4 years ago
Brad Fitzpatrick	64a24e796b	wgengine/tstun: fix 32-bit alignment again	4 years ago
Brad Fitzpatrick	afb2be71de	wgengine: add two missing TUN close calls	4 years ago
Brad Fitzpatrick	abe095f036	wgengine/tstun: make Close safe for concurrent use	4 years ago
Christina Wen	f0e9dcdc0a	wgengine/router: restore /etc/resolv.conf after tailscale down is called ... This change is to restore /etc/resolv.conf after tailscale down is called. This is done by setting the dns.Manager before errors occur. Error collection is also added. Fixes #723	4 years ago
Brad Fitzpatrick	acafe9811f	wgengine/router: run netsh advfirewall less, rename, document setFirewall	4 years ago
Christina Wen	48fbe93e72	wgengine/magicsock: clarify pre-disco 'tailscale ping' error message ... This change clarifies the error message when a user pings a peer that is using an outdated version of Tailscale.	4 years ago
Christina Wen	e862f90e34	wgengine/router/router_linux.go: fixed " route del failed" error (#756) ... * wgengine/router/router_linux.go: Switched `cidrDiff("addr")` and `cidrDiff("route")` order Signed-off-by: Christina Wen <christina@tailscale.com> Co-authored-by: Christina Wen <christina@tailscale.com>	4 years ago
Brad Fitzpatrick	7e9d1f7808	wgengine/router: tighten isMissingIPv6Err ... So it doesn't false positive if misused. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
David Anderson	8f5b52e571	net/netns: add windows support. ... Also remove rebinding logic from the windows router. Magicsock will instead rebind based on link change signals. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
Josh Bleecher Snyder	a5d701095b	wgengine/magicsock: increase test timeout to reduce flakiness ... Updates #654. See that issue for a discussion of why this timeout reduces flakiness, and what next steps are. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
Josh Bleecher Snyder	0c0239242c	wgengine/magicsock: make discoPingPurpose a stringer ... It was useful for debugging once, it'll probably be useful again. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
Josh Bleecher Snyder	6e38d29485	wgengine/magicsock: improve test logging output ... This fixes line numbers and reduces timestamp precision to overwhelming the output. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
Brad Fitzpatrick	a084c44afc	wgengine, wgengine/router, cmd/tailscale: force netfilter mode off on Synology ... For now. Get it working again so it's not stuck on 0.98. Subnet relay can come later. Updates #451 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	31c13013ae	wgengine/router: tolerate disabled IPv6 on Windows ... Fixes #412 Updates #524 (maybe fixes?) Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Josh Bleecher Snyder	37b40b035b	wgengine/router/dns: appease staticcheck (again)	4 years ago
Josh Bleecher Snyder	a877dd575c	wgengine/router/dns: remove unnecessary lint ignore line ... Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
Brad Fitzpatrick	913c1bd04f	wgengine/router: on Windows, add a firewall rule to allow Tailscale ... Updates tailscale/tailscale#454	4 years ago
Josh Bleecher Snyder	57e642648f	wgengine/magicsock: fix typo in comment	4 years ago
Brad Fitzpatrick	6d14678009	wgengine/router: remove unnecessary newlines in log.Printf formats	4 years ago
Brad Fitzpatrick	09d56f54a7	wgengine/router: fix Windows route sorting that caused de-dup to not work (#727) ... Updates #725 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	9b07517f18	wgengine: add Engine.SetLinkChangeCallback ... Start of making the IPN state machine react to link changes and down its DNS & routes if necessary to unblock proxy resolution (e.g. for transitioning from public to corp networks where the corp network has mandatory proxies and WPAD PAC files that can't be resolved while using the DNS/routes configured previously) This change should be a no-op. Just some callback plumbing.	4 years ago
Dmytro Shynkevych	cb5f3c0819	tsdns: log when settings upstreams. ... It turns out that otherwise we don't know what exactly was set. Also remove the now unused RootDomain config option. Signed-off-by: Dmytro Shynkevych <dmytro@tailscale.com>	4 years ago
Dmytro Shynkevych	aa1da24f18	tsdns: remove now unused fields. ... Missed in 7541982635. Signed-off-by: Dmytro Shynkevych <dmytro@tailscale.com>	4 years ago
Dmytro Shynkevych	7541982635	tsdns: remove forwarding queue. ... Two levels of queueing are unnecessary. The resulting implementation performs as follows under request bursts (`count` packets sent concurrently): lost count avg latency 0 / 256 (00.00%) - 28ms 0 / 512 (00.00%) - 146ms 0 / 768 (00.00%) - 166ms 0 / 1024 (00.00%) - 416ms 11 / 1280 (00.86%) - 430ms 145 / 1536 (09.44%) - 715ms 364 / 2048 (17.77%) - 836ms Signed-off-by: Dmytro Shynkevych <dmytro@tailscale.com>	4 years ago
Dmytro Shynkevych	34a7e7c12b	tsdns: be more strict with type validation. ... Previously, a type AAAA query would be answered with an A record if only an IPv4 address was available. This is irrelevant for us while we only use IPv4, but it will be a bug one day, so it's worth being precise about semantics. Signed-off-by: Dmytro Shynkevych <dmytro@tailscale.com>	4 years ago
Dmytro Shynkevych	bc34788e65	tsdns: fix accidental rejection of all non-{A, AAAA} questions. ... This is a bug introduced in a903d6c2ed. Signed-off-by: Dmytro Shynkevych <dmytro@tailscale.com>	4 years ago
Brad Fitzpatrick	756d6a72bd	wgengine: lazily create peer wireguard configs more explicitly ... Rather than consider bigs jumps in last-received-from activity as a signal to possibly reconfigure the set of wireguard peers to have configured, instead just track the set of peers that are currently excluded from the configuration. Easier to reason about. Also adds a bit more logging. This might fix an error we saw on a machine running a recent unstable build: 2020-08-26 17:54:11.528033751 +0000 UTC: 8.6M/92.6M magicsock: [unexpected] lazy endpoint not created for [UcppE], d:42a770f678357249 2020-08-26 17:54:13.691305296 +0000 UTC: 8.7M/92.6M magicsock: DERP packet received from idle peer [UcppE]; created=false 2020-08-26 17:54:13.691383687 +0000 UTC: 8.7M/92.6M magicsock: DERP packet from unknown key: [UcppE] If it does happen again, though, we'll have more logs.	4 years ago
halulu	f27a57911b	cmd/tailscale: add derp and endpoints status (#703) ... cmd/tailscale: add local node's information to status output (by default) RELNOTE=yes Updates #477 Signed-off-by: Halulu <lzjluzijie@gmail.com>	4 years ago
David Crawshaw	dd2c61a519	magicsock: call RequestStatus when DERP connects ... Second attempt. Signed-off-by: David Crawshaw <crawshaw@tailscale.com>	4 years ago
David Crawshaw	a67b174da1	Revert "magicsock: call RequestStatus when DERP connects" ... Seems to break linux CI builder. Cannot reproduce locally, so attempting a rollback. This reverts commit cd7bc02ab1. Signed-off-by: David Crawshaw <crawshaw@tailscale.com>	4 years ago
David Crawshaw	cd7bc02ab1	magicsock: call RequestStatus when DERP connects ... Without this, a freshly started ipn client will be stuck in the "Starting" state until something triggers a call to RequestStatus. Usually a UI does this, but until then we can sit in this state until poked by an external event, as is evidenced by our e2e tests locking up when DERP is attached. (This only recently became a problem when we enabled lazy handshaking everywhere, otherwise the wireugard tunnel creation would also trigger a RequestStatus.) Signed-off-by: David Crawshaw <crawshaw@tailscale.com>	4 years ago
Brad Fitzpatrick	24d1a38e81	wgengine/monitor: add a poller to the Windows link change monitor ... The poller is slow by default, but speeds up for a bit after a network change, in case WPAD/PAC files are still loading.	4 years ago
Dmytro Shynkevych	a903d6c2ed	tailcfg, tsdns: derive root domains from list of nodes (#708) ... Signed-off-by: Dmytro Shynkevych <dmytro@tailscale.com>	4 years ago
Disconnect3d	44598e3e89	wgengine/monitor_freebsd.go: remove duplicated errcheck ... Signed-off-by: disconnect3d <dominik.b.czarnota@gmail.com>	4 years ago
Brad Fitzpatrick	7841c97af5	wgengine: make lazy wireguard on by default ... It can still be explicitly enabled or disabled via the environment variable, then via control. But the default is to be lazy now.	4 years ago
Dmytro Shynkevych	6c71e5b851	tsdns: copy name when loewrcasing. ... The previous approach modifies name in-place in the request slice to avoid an allocation. This is incorrect: the question section of a DNS request must be copied verbatim, without any such modification. Software may rely on it (we rely on other resolvers doing it it in tsdns/forwarder). Signed-off-by: Dmytro Shynkevych <dmytro@tailscale.com>	4 years ago
Dmytro Shynkevych	1886dfdca3	tsdns: lowercase the name in parseQuery. ... Domains in DNS should be case-insensitive. Signed-off-by: Dmytro Shynkevych <dmytro@tailscale.com>	4 years ago
Brad Fitzpatrick	9337a99dff	tailcfg, wgengine, controlclient: add control-side gating of lazy WG config	4 years ago
chungdaniel	4d56d19b46	control/controlclient, wgengine/filter: extract parsePacketFilter to … (#696) ... control/controlclient, wgengine/filter: extract parsePacketFilter to new constructor in wgengine/filter Signed-off-by: chungdaniel <daniel@tailscale.com>	4 years ago
Brad Fitzpatrick	461db356b9	wgengine/router/dns: fix staticcheck error on Mac	4 years ago
Dmytro Shynkevych	1af70e2468	tsdns: delegate requests asynchronously (#687) ... Signed-Off-By: Dmytro Shynkevych <dmytro@tailscale.com>	4 years ago
Dmytro Shynkevych	a583e498b0	router/dns: set all domains on Windows (#672) ... Signed-off-by: Dmytro Shynkevych <dmytro@tailscale.com>	4 years ago
Brad Fitzpatrick	f6dc47efe4	tailcfg, controlclient, magicsock: add control feature flag to enable DRPO ... Updates #150	4 years ago
Brad Fitzpatrick	dbb4c246fa	wgengine/monitor: add Windows linkchange monitor ... Updates tailscale/corp#553 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	85c3d17b3c	wgengine/magicsock: use disco ping src as a candidate endpoint ... Consider: Hard NAT (A) <---> Hard NAT w/ mapped port (B) If A sends a packet to B's mapped port, A can disco ping B directly, with low latency, without DERP. But B couldn't establish a path back to A and needed to use DERP, despite already logging about A's endpoint and adding a mapping to it for other purposes (the wireguard conn.Endpoint lookup also needed it). This adds the tracking to discoEndpoint too so it'll be used for finding a path back. Fixes tailscale/corp#556 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	0512fd89a1	wgengine/magicsock: simplify handlePingLocked ... It's no longer true that 'de may be nil'	4 years ago
Brad Fitzpatrick	b983e5340f	wgengine/monitor: add, clean up netlink logging on route changes ... Updates #643	4 years ago
Mike Kramlich	6fa7a9a055	wgengine/router/router_userspace_bsd: on Mac the route program syntax expects delete not del -- this had caused router reconfig to fail in some cases. Fixes #673 ... Signed-off-by: Mike Kramlich <groglogic@gmail.com>	4 years ago
Dmytro Shynkevych	95a18f815c	router/dns: detect host endianness for NetworkManager. ... Signed-off-by: Dmytro Shynkevych <dmytro@tailscale.com>	4 years ago
Brad Fitzpatrick	b97aac1718	net/interfaces: include DefaultRouteInterface in interfaces.State ... And log it in wgengine on change. Changing bug in #643. Updates #643	4 years ago
Brad Fitzpatrick	84dc891843	cmd/tailscale/cli: add ping subcommand ... For example: $ tailscale ping -h USAGE ping <hostname-or-IP> FLAGS -c 10 max number of pings to send -stop-once-direct true stop once a direct path is established -verbose false verbose output $ tailscale ping mon.ts.tailscale.com pong from monitoring (100.88.178.64) via DERP(sfo) in 65ms pong from monitoring (100.88.178.64) via DERP(sfo) in 252ms pong from monitoring (100.88.178.64) via [2604:a880:2:d1::36:d001]:41641 in 33ms Fixes #661 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	c64a43a734	wgengine/router: set MTU on Windows to min(configured,possible) ... Fixes tailscale/corp#542 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Josh Bleecher Snyder	2622e8e082	wgenginer/router: fix build ... Rebasing github.com/tailscale/wireguard-go to upstream wireguard-go changed the API. This commit is analogous to https://git.zx2c4.com/wireguard-windows/commit/?id=6823cc10ffe193c0cb1d61a5d1828d563d3d0e5f	4 years ago
Dmytro Shynkevych	cb01058a53	wgengine: stop giving tsdns a buffer that will be reused ... Signed-off-by: Dmytro Shynkevych <dmytro@tailscale.com>	4 years ago
Brad Fitzpatrick	9a346fd8b4	wgengine,magicsock: fix two lazy wireguard config issues ... 1) we weren't waking up a discoEndpoint that once existed and went idle for 5 minutes and then got a disco message again. 2) userspaceEngine.noteReceiveActivity had a buggy check; fixed and added a test	4 years ago
Dmytro Shynkevych	78c2e1ff83	tsdns: implement reverse DNS lookups, canonicalize names everywhere. (#640) ... Signed-off-by: Dmytro Shynkevych <dmytro@tailscale.com>	4 years ago
Brad Fitzpatrick	41c4560592	control/controlclient: remove unused NetworkMap.UAPI method ... And remove last remaining use of wgcfg.ToUAPI in a test's debug output; replace it with JSON.	4 years ago
Brad Fitzpatrick	cff737786e	wgengine/magicsock: fix lazy config deadlock, document more lock ordering ... This removes the atomic bool that tried to track whether we needed to acquire the lock on a future recursive call back into magicsock. Unfortunately that hack doesn't work because we also had a lock ordering issue between magicsock and userspaceEngine (see issue). This documents that too. Fixes #644	4 years ago
Brad Fitzpatrick	43bc86588e	wgengine/monitor: log RTM_DELROUTE details, fix format strings ... Updates #643	4 years ago
Brad Fitzpatrick	2bd9ad4b40	wgengine: fix deadlock between engine and magicsock	4 years ago
Brad Fitzpatrick	7c38db0c97	wgengine/magicsock: don't deadlock on pre-disco Endpoints w/ lazy wireguard configs ... Fixes tailscale/tailscale#637	4 years ago
Brad Fitzpatrick	4987a7d46c	wgengine/magicsock: when hard NAT, add stun-ipv4:static-port as candidate ... If a node is behind a hard NAT and is using an explicit local port number, assume they might've mapped a port and add their public IPv4 address with the local tailscaled's port number as a candidate endpoint.	4 years ago
Brad Fitzpatrick	bfcb0aa0be	wgengine/magicsock: deflake tests, Close deadlock again ... Better fix than 37903a9056 Fixes tailscale/corp#533	4 years ago
Brad Fitzpatrick	da3b50ad88	wgengine/filter: omit logging for all v6 multicast, remove debug panic :(	4 years ago
Dmytro Shynkevych	28e52a0492	all: dns refactor, add Proxied and PerDomain flags from control (#615) ... Signed-off-by: Dmytro Shynkevych <dmytro@tailscale.com>	4 years ago
Brad Fitzpatrick	3e493e0417	wgengine: fix lazy wireguard config bug on sent packet minute+ later ... A comparison operator was backwards. The bad case went: * device A send packet to B at t=1s * B gets added to A's wireguard config * B gets packet (5 minutes pass) * some other activity happens, causing B to expire to be removed from A's network map, since it's been over 5 minutes since sent or received activity * device A sends packet to B at t=5m1s * normally, B would get added back, but the old send time was not zero (we sent earlier!) and the time comparison was backwards, so we never regenerated the wireguard config. This also refactors the code for legibility and moves constants up top, with comments.	4 years ago
Dmytro Shynkevych	8c850947db	router: split off sandboxed path from router_darwin (#624) ... Signed-off-by: Dmytro Shynkevych <dmytro@tailscale.com>	4 years ago
Brad Fitzpatrick	cb970539a6	wgengine/magicsock: remove TODO comment that's no longer applicable	4 years ago
Brad Fitzpatrick	915f65ddae	wgengine/magicsock: stop disco activity on IPN stop ... Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	c180abd7cf	wgengine/magicsock: merge errClosed and errConnClosed	4 years ago
Brad Fitzpatrick	7cc8fcb784	wgengine/filter: remove leftover debug knob that staticcheck doesn't like	4 years ago
Brad Fitzpatrick	b4d97d2532	wgengine/filter: fix IPv4 IGMP spam omission, also omit ff02::16 spam ... And add tests. Fixes #618 Updates #402	4 years ago
Dmytro Shynkevych	2ce2b63239	router: stop iOS subprocess sandbox violations (#617) ... Signed-off-by: Dmytro Shynkevych <dmytro@tailscale.com>	4 years ago
Dmytro Shynkevych	154d1cde05	router: reload systemd-resolved after changing /etc/resolv.conf (#619) ... Signed-off-by: Dmytro Shynkevych <dmytro@tailscale.com>	4 years ago
Brad Fitzpatrick	b3fc61b132	wgengine: disable wireguard config trimming for now except iOS w/ many peers ... Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	d55fdd4669	wgengine/magicsock: update, flesh out a TODO	4 years ago
Brad Fitzpatrick	d96d26c22a	wgengine/filter: don't spam logs on dropped outgoing IPv6 ICMP or IPv4 IGMP ... The OS (tries) to send these but we drop them. No need to worry the user with spam that we're dropping it. Fixes #402 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Dmytro Shynkevych	c7582dc234	ipn: fix netmap change tracking and dns map generation (#609) ... Signed-off-by: Dmytro Shynkevych <dmytro@tailscale.com>	4 years ago
Brad Fitzpatrick	3e3c24b8f6	wgengine/packet: add IPVersion field, don't use IPProto to note version ... As prep for IPv6 log spam fixes in a future change. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
David Anderson	f8e4c75f6b	wgengine/magicsock: check slightly less aggressively for connectivity. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
Brad Fitzpatrick	58b721f374	wgengine/magicsock: deflake some tests with an ugly hack ... Starting with fe68841dc7, some e2e tests got flaky. Rather than debug them (they're gnarly), just revert to the old behavior as far as those tests are concerned. The tests were somehow using magicsock without a private key and expecting it to do ... something. My goal with fe68841dc7 was to stop log spam and unnecessary work I saw on the iOS app when when stopping the app. Instead, only stop doing that work on any transition from once-had-a-private-key to no-longer-have-a-private-key. That fixes what I wanted to fix while still making the mysterious e2e tests happy.	4 years ago
David Anderson	41d0c81859	wgengine/magicsock: make disco subtest name more precise. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	9beea8b314	wgengine/magicsock: remove unnecessary use of context. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	b62341d308	wgengine/magicsock: add docstring. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	9265296b33	wgengine/magicsock: don't deadlock on shutdown if sending blocks. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	0249236cc0	ipn/ipnstate: record assigned Tailscale IPs. ... wgengine/magicsock: use ipnstate to find assigned Tailscale IPs. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	c3958898f1	tstest/natlab: be a bit more lenient during test shutdown. ... There is a race in natlab where we might start shutdown while natlab is still running a goroutine or two to deliver packets. This adds a small grace period to try and receive it before continuing shutdown. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	7578c815be	wgengine/magicsock: give pinger a more generous packet timeout. ... The first packet to transit may take several seconds to do so, because setup rates in wgengine may result in the initial WireGuard handshake init to get dropped. So, we have to wait at least long enough for a retransmit to correct the fault. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	c3994fd77c	derp: remove OnlyDisco option. ... Active discovery lets us introspect the state of the network stack precisely enough that it's unnecessary, and dropping the initial DERP packets greatly slows down tests. Additionally, it's unrealistic since our production network will never deliver _only_ discovery packets, it'll be all or nothing. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	5455c64f1d	wgengine/magicsock: add a test for two facing endpoint-independent NATs. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	f794493b4f	wgengine/magicsock: explicitly check path discovery, add a firewall test. ... The test proves that active discovery can traverse two facing firewalls. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago