1269 Commits (0498d5ea86bb5b84b6038cdd8b07f3728139b5e4)

Author	SHA1	Message	Date
Brad Fitzpatrick	86a902b201	all: adjust some log verbosity ... Updates #1548 Change-Id: Ia55f1b5dc7dfea09a08c90324226fb92cd10fa00 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	6eed2811b2	wgengine/netstack: start supporting different SSH users ... Updates #3802 Change-Id: I44de6897e36b1362cd74c9b10c9cbfeb9abc3dbc Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	bd90781b34	ipn/ipnlocal, wgengine/netstack: use netstack for peerapi server ... We're finding a bunch of host operating systems/firewalls interact poorly with peerapi. We either get ICMP errors from the host or users need to run commands to allow the peerapi port: https://github.com/tailscale/tailscale/issues/3842#issuecomment-1025133727 ... even though the peerapi should be an internal implementation detail. Rather than fight the host OS & firewalls, this change handles the server side of peerapi entirely in netstack (except on iOS), so it never makes its way to the host OS where it might be messed with. Two main downsides are: 1) netstack isn't as fast, but we don't really need speed for peerapi. And actually, with fewer trips to/from the kernel, we might actually make up for some of the netstack performance loss by staying in userspace. 2) tcpdump / Wireshark etc packet captures will no longer see the peerapi traffic. Oh well. Crawshaw's been wanting to add packet capture server support to tailscaled, so we'll probably do that sooner now. A future change might also then use peerapi for the client-side (except on iOS). Updates #3842 (probably fixes, as well as many exit node issues I bet) Change-Id: Ibc25edbb895dc083d1f07bd3cab614134705aa39 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	730aa1c89c	derp/derphttp, wgengine/magicsock: prefer IPv6 to DERPs when IPv6 works ... Fixes #3838 Change-Id: Ie47a2a30c7e8e431512824798d2355006d72fb6a Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	1af26222b6	go.mod: bump netstack, switch to upstream netstack ... Now that Go 1.17 has module graph pruning (https://go.dev/doc/go1.17#go-command), we should be able to use upstream netstack without breaking our private repo's build that then depends on the tailscale.com Go module. This is that experiment. Updates #1518 (the original bug to break out netstack to own module) Updates #2642 (this updates netstack, but doesn't remove workaround) Change-Id: I27a252c74a517053462e5250db09f379de8ac8ff Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
David Anderson	7a18fe3dca	wgengine/magicsock: make debugUseDerpRoute an opt.Bool. ... Can still be constant, just needs the extra methods. Fixes #3812 Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
Brad Fitzpatrick	f3c0023add	wgengine/netstack: add an SSH server experiment ... Disabled by default. To use, run tailscaled with: TS_SSH_ALLOW_LOGIN=you@bar.com And enable with: $ TAILSCALE_USE_WIP_CODE=true tailscale up --ssh=true Then ssh [any-user]@[your-tailscale-ip] for a root bash shell. (both the "root" and "bash" part are temporary) Updates #3802 Change-Id: I268f8c3c95c8eed5f3231d712a5dc89615a406f0 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	41fd4eab5c	envknob: add new package for all the strconv.ParseBool(os.Getenv(..)) ... A new package can also later record/report which knobs are checked and set. It also makes the code cleaner & easier to grep for env knobs. Change-Id: Id8a123ab7539f1fadbd27e0cbeac79c2e4f09751 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	c64af5e676	wgengine/netstack: clear TCP ECN bits before giving to gvisor ... Updates #2642 Change-Id: Ic219442a2656dd9dc99ae1dd91e907fd3d924987 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Josh Bleecher Snyder	de4696da10	wgengine/magicsock: fix deadlock on shutdown ... This fixes a deadlock on shutdown. One goroutine is waiting to send on c.derpRecvCh before unlocking c.mu. The other goroutine is waiting to lock c.mu before receiving from c.derpRecvCh. #3736 has a more detailed explanation of the sequence of events. Fixes #3736 Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Brad Fitzpatrick	185825df11	wgengine/netstack: add a missing refcount decrement after packet injection ... Fixes #3762 Updates #3745 (probably fixes?) Change-Id: I1d3f0590fd5b8adfbc9110bc45ff717bb9e79aae Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	790e41645b	wgengine/netstack: add an Impl.Close method for tests ... Change-Id: Idbb3fd6d749d3e4effdf96de77a1106584822fef Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	166fe3fb12	wgengine/netstack: add missing error logging in a RST case ... Updates #2642 Change-Id: I9f2f8fd28fc980208b0739eb9caf9db7b0977c09 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	6be48dfcc6	wgengine/netstack: fix netstack ping timeout on darwin ... -W is milliseconds on darwin, not seconds, and empirically it's milliseconds after a 1 second base. Change-Id: I2520619e6699d9c505d9645ce4dfee4973555227 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	5404a0557b	wgengine/magicsock: remove a per-DERP-packet map lookup in common case ... Updates #150 Change-Id: Iffb6eccbe7ca97af97d29be63b7e37d487b3ba28 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	5a317d312d	wgengine/magicsock: enable DERP Return Path Optimization (DRPO) ... Turning this on at the beginning of the 1.21.x dev cycle, for 1.22. Updates #150 Change-Id: I1de567cfe0be3df5227087de196ab88e60c9eb56 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	c6c39930cc	wgengine/magicsock: fix lock ordering deadlock with derphttp ... Fixes #3726 Change-Id: I32631a44dcc1da3ae47764728ec11ace1c78190d Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	a93937abc3	wgengine/netstack: make userspace ping work when tailscaled has CAP_NET_RAW ... Updates #3710 Change-Id: Ief56c7ac20f5f09a2f940a1906b9efbf1b0d6932 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	1a4e8da084	wgengine/netstack: fake pings through netstack on Android too ... Every OS ping binary is slightly different. Adjust for Android's. Updates #1738 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	1b426cc232	wgengine/netstack: add env knob to turn on netstack debug logs ... Except for the super verbose packet-level dumps. Keep those disabled by default with a const. Updates #2642 Change-Id: Ia9eae1677e8b3fe6f457a59e44896a335d95d547 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	addda5b96f	wgengine/magicsock: fix watchdog timeout on Close when IPv6 not available ... The blockForeverConn was only using its sync.Cond one side. Looks like it was just forgotten. Fixes #3671 Change-Id: I4ed0191982cdd0bfd451f133139428a4fa48238c Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	28bf53f502	wgengine/magicsock: reduce disco ping heartbeat aggressiveness a bit ... Bigger changes coming later, but this should improve things a bit in the meantime. Rationale: * 2 minutes -> 45 seconds: 2 minutes was overkill and never considered phones/battery at the time. It was totally arbitrary. 45 seconds is also arbitrary but is less than 2 minutes. * heartbeat from 2 seconds to 3 seconds: in practice this meant two packets per second (2 pings and 2 pongs every 2 seconds) because the other side was also pinging us every 2 seconds on their own. That's just overkill. (see #540 too) So in the worst case before: when we sent a single packet (say: a DNS packet), we ended up sending 61 packets over 2 minutes: the 1 DNS query and then then 60 disco pings (2 minutes / 2 seconds) & received the same (1 DNS response + 60 pongs). Now it's 15. In 1.22 we plan to remove this whole timer-based heartbeat mechanism entirely. The 5 seconds to 6.5 seconds change is just stretching out that interval so you can still miss two heartbeats (other 3 + 3 seconds would be greater than 5 seconds). This means that if your peer moves without telling you, you can have a path out for 6.5 seconds now instead of 5 seconds before disco finds a new one. That will also improve in 1.22 when we start doing UDP+DERP at the same time when confidence starts to go down on a UDP path. Updates #3363 Change-Id: Ic2314bbdaf42edcdd7103014b775db9cf4facb47 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	a201b89e4a	wgengine/magicsock: reconnect to DERP when its definition changes ... Change-Id: I7c560feb9e4a6e155a35ec764a68354f19f694e4 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	506c727e30	ipnlocal, net/{dns,tsaddr,tstun}, wgengine: support MagicDNS on IPv6 ... Fixes #3660 RELNOTE=MagicDNS now works over IPv6 when CGNAT IPv4 is disabled. Change-Id: I001e983df5feeb65289abe5012dedd177b841b45 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	7d9b1de3aa	netcheck,portmapper,magicsock: ignore some UDP write errors on Linux ... Treat UDP send EPERM errors as a lost UDP packet, not something super fatal. That's just the Linux firewall preventing it from going out. And add a leaf package net/neterror for that (and future) policy that all three packages can share, with tests. Updates #3619 Change-Id: Ibdb838c43ee9efe70f4f25f7fc7fdf4607ba9c1d Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	2c94e3c4ad	wgengine/magicsock: don't unconditionally close DERP connections on rebind ... Only if the source address isn't on the currently active interface or a ping of the DERP server fails. Updates #3619 Change-Id: I6bf06503cff4d781f518b437c8744ac29577acc8 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	ae319b4636	wgengine/magicsock: add HTML debug handler to see magicsock state ... Change-Id: Ibc46f4e9651e1c86ec6f5d139f5e9bdc7a488415 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	c7f5bc0f69	wgengine/magicsock: add metrics for sent disco messages ... We only tracked the transport type (UDP vs DERP), not what they were. Change-Id: Ia4430c1c53afd4634e2d9893d96751a885d77955 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	5a9914a92f	wgengine/netstack: don't remove 255.255.255.255/32 from netstack ... The intent of the updateIPs code is to add & remove IP addresses to netstack based on what we get from the netmap. But netstack itself adds 255.255.255.255/32 apparently and we always fight it (and it adds it back?). So stop fighting it. Updates #2642 (maybe fixes? maybe.) Change-Id: I37cb23f8e3f07a42a1a55a585689ca51c2be7c60 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Josh Bleecher Snyder	93ae11105d	ipn/ipnlocal: clear magicsock's netmap on logout ... magicsock was hanging onto its netmap on logout, which caused tailscale status to display partial information about a bunch of zombie peers. After logout, there should be no peers. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Brad Fitzpatrick	6590fc3a94	wgengine/netstack: remove some logging on forwarding connections ... Change-Id: Ib1165b918cd5da38583f8e7d4be8cda54af3c81d Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	486059589b	all: gofmt -w -s (simplify) tests ... And it updates the build tag style on a couple files. Change-Id: I84478d822c8de3f84b56fa1176c99d2ea5083237 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Maisem Ali	d24a8f7b5a	wgengine/router{windows}: return the output from the firewallTweaker ... on error. While debugging a customer issue where the firewallTweaker was failing the only message we have is `router: firewall: error adding Tailscale-Process rule: exit status 1` which is not really helpful. This will help diagnose firewall tweaking failures. Signed-off-by: Maisem Ali <maisem@tailscale.com>	3 years ago
Brad Fitzpatrick	b59e7669c1	wgengine/netstack: in netstack/hybrid mode, fake ICMP using ping command ... Change-Id: I42cb4b9b326337f4090d9cea532230e36944b6cb Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	7b9c7bc42b	ipn/ipnstate: remove old deprecated TailAddr IPv4-only field ... It's been a bunch of releases now since the TailscaleIPs slice replacement was added. Change-Id: I3bd80e1466b3d9e4a4ac5bedba8b4d3d3e430a03 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Denton Gentry	878a20df29	net/dns: add GetBaseConfig to CallbackRouter. ... Allow users of CallbackRouter to supply a GetBaseConfig implementation. This is expected to be used on Android, which currently lacks both a) platform support for Split-DNS and b) a way to retrieve the current DNS servers. iOS/macOS also use the CallbackRouter but have platform support for SplitDNS, so don't need getBaseConfig. Updates https://github.com/tailscale/tailscale/issues/2116 Updates https://github.com/tailscale/tailscale/issues/988 Signed-off-by: Denton Gentry <dgentry@tailscale.com>	3 years ago
Todd Neal	eeccbccd08	support running in a FreeBSD jail ... Since devd apparently can't be made to work in a FreeBSD jail fall back to polling. Fixes tailscale#2858 Signed-off-by: Todd Neal <todd@tneal.org>	3 years ago
Brad Fitzpatrick	69de3bf7bf	wgengine/filter: let unknown IPProto match if IP okay & match allows all ports ... RELNOTE=yes Change-Id: I96eaf3cf550cee7bb6cdb4ad81fc761e280a1b2a Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	9c5c9d0a50	ipn/ipnlocal, net/tsdial: make SOCKS/HTTP dials use ExitDNS ... And simplify, unexport some tsdial/netstack stuff in the the process. Fixes #3475 Change-Id: I186a5a5cbd8958e25c075b4676f7f6e70f3ff76e Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	adc5997592	net/tsdial: give netstack a Dialer, start refactoring name resolution ... This starts to refactor tsdial.Dialer's name resolution to have different stages: in-memory MagicDNS vs system resolution. A future change will plug in ExitDNS resolution. This also plumbs a Dialer into netstack and unexports the dnsMap internals. And it removes some of the async AddNetworkMapCallback usage and replaces it with synchronous updates of the Dialer's netmap from LocalBackend, since the LocalBackend has the Dialer too. Updates #3475 Change-Id: Idcb7b1169878c74f0522f5151031ccbc49fe4cb4 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	ad3d6e31f0	net/tsdial: move macOS/iOS peerapi sockopt logic from LocalBackend ... Change-Id: I812cae027c40c70cdc701427b1a1850cd9bcd60c Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	c7fb26acdb	net/tsdial: also plumb TUN name and monitor into tsdial.Dialer ... In prep for moving stuff out of LocalBackend. Change-Id: I9725aa9c3ebc7275f8c40e040b326483c0340127 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	c37af58ea4	net/tsdial: move more weirdo dialing into new tsdial package, plumb ... Not done yet, but this move more of the outbound dial special casing from random packages into tsdial, which aspires to be the one unified place for all outbound dialing shenanigans. Then this plumbs it all around, so everybody is ultimately holding on to the same dialer. As of this commit, macOS/iOS using an exit node should be able to reach to the exit node's DoH DNS proxy over peerapi, doing the sockopt to stay within the Network Extension. A number of steps remain, including but limited to: * move a bunch more random dialing stuff * make netstack-mode tailscaled be able to use exit node's DNS proxy, teaching tsdial's resolver to use it when an exit node is in use. Updates #1713 Change-Id: I1e8ee378f125421c2b816f47bc2c6d913ddcd2f5 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	bf1d69f25b	wgengine/monitor: fix docs on Mon.InterfaceState ... The behavior was changed in March (in 7f174e84e6) but that change forgot to update these docs. Change-Id: I79c0301692c1d13a4a26641cc5144baf48ec1360 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	d5405c66b7	net/tsdial: start of new package to unify all outbound dialing complexity ... For now this just deletes the net/socks5/tssocks implementation (and the DNSMap stuff from wgengine/netstack) and moves it into net/tsdial. Then initialize a Dialer early in tailscaled, currently only use for the outbound and SOCKS5 proxies. It will be plumbed more later. Notably, it needs to get down into the DNS forwarder for exit node DNS forwading in netstack mode. But it will also absorb all the peerapi setsockopt and netns Dial and tlsdial complexity too. Updates #1713 Change-Id: Ibc6d56ae21a22655b2fa1002d8fc3f2b2ae8b6df Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	bb91cfeae7	net/socks5/tssocks, wgengine: permit SOCKS through subnet routers/exit nodes ... Fixes #1970 Change-Id: Ibef45e8796e1d9625716d72539c96d1dbf7b1f76 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	ff9727c9ff	wgengine/filter: fix, test NewAllowAllForTest ... I probably broke it when SCTP support was added but nothing apparently ever used NewAllowAllForTest so it wasn't noticed when it broke. Change-Id: Ib5a405be233d53cb7fcc61d493ae7aa2d1d590a2 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
David Anderson	33c541ae30	ipn/ipnlocal: populate self status from netmap in ipnlocal, not magicsock. ... Fixes #1933 Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
Brad Fitzpatrick	283ae702c1	ipn/ipnlocal: start adding DoH DNS server to peerapi when exit node ... Updates #1713 Change-Id: I8d9c488f779e7acc811a9bc18166a2726198a429 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Josh Bleecher Snyder	ad5e04249b	wgengine/monitor: ignore adding/removing uninteresting IPs ... One of the most common "unexpected" log lines is: "network state changed, but stringification didn't" One way that this can occur is if an interesting interface (non-Tailscale, has interesting IP address) gains or loses an uninteresting IP address (link local or loopback). The fact that the interface is interesting is enough for EqualFiltered to inspect it. The fact that an IP address changed is enough for EqualFiltered to declare that the interfaces are not equal. But the State.String method reasonably declines to print any uninteresting IP addresses. As a result, the network state appears to have changed, but the stringification did not. The String method is correct; nothing interesting happened. This change fixes this by adding an IP address filter to EqualFiltered in addition to the interface filter. This lets the network monitor ignore the addition/removal of uninteresting IP addresses. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Brad Fitzpatrick	e8db43e8fa	wgengine/router: demote TestDebugListRules fail to skip ... Updates #3360 Change-Id: Ic5c98ea03f3171c13ab9293a0ae74d17fd04d149 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	2ea765e5d8	go.mod: bump inet.af/netstack ... Updates #2642 (I'd hoped, but doesn't seem to fix it) Change-Id: Id54af7c90a1206bc7018215957e20e954782b911 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	946dfec98a	wgengine/router: fix checkIPRuleSupportsV6 to actually use IPv6 ... Updates #3358 (should fix it) Updates #391 Change-Id: Ia62437dfa81247b0b5994d554cf279c3d540e4e7 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	9259377a7f	wgengine/router: don't assume Linux was built with IP_MULTIPLE_TABLES ... Updates #3351 Updates #391 Change-Id: I7e66b686e05f3c970846513679cc62556ebe322a Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	0350cf0438	wgengine{,/router}: annotate some more errors ... Updates #3351 Change-Id: I8b4f957d2051b3e29401bb449dbadbdada3a7c46 Signed-off-by: Brad Fitzpatrick <bradfitz@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
Josh Bleecher Snyder	85184a58ed	wgengine/wgcfg: recover from mismatched PublicKey/Endpoints ... In rare circumstances (tailscale/corp#3016), the PublicKey and Endpoints can diverge. This by itself doesn't cause any harm, but our early exit in response did, because it prevented us from recovering from it. Remove the early exit. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Brad Fitzpatrick	8ec44d0d5f	wgengine/magicsock: remove some log spam ... Fixes tailscale/corp#3070 Change-Id: Ie50031800ec8669e0596ad6d59d1e329a5c88516 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	61d0435ed9	wgengine/monitor: reduce Windows log spam ... Fixes #3345 Change-Id: Icde9c92f88f98bb3b030d39b0424a7d389bceb88 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	d24ed3f68e	wgengine/router: add debug knob to resort to Linux "ip" command usage ... Tailscale 1.18 uses netlink instead of the "ip" command to program the Linux kernel. The old way was kept primarily for tests, but this also adds a TS_DEBUG_USE_IP_COMMAND environment knob to force the old way temporarily for debugging anybody who might have problems with the new way in 1.18. Updates #391 Change-Id: I0236fbfda6c9c05dcb3554fcc27ec0c86456efd9 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Josh Bleecher Snyder	b3d6704aa3	wgengine/magicsock: fix data race on endpoint.discoKey ... endpoint.discoKey is protected by endpoint.mu. endpoint.sendDiscoMessage was reading it without holding the lock. This showed up in a CI failure and is readily reproducible locally. The fix is in two parts. First, for Conn.enqueueCallMeMaybe, eliminate the one-line helper method endpoint.sendDiscoMessage; call Conn.sendDiscoMessage directly. This makes it more natural to read endpoint.discoKey in a context in which endpoint.mu is already held. Second, for endpoint.sendDiscoPing, explicitly pass the disco key as an argument. Again, this makes it easier to read endpoint.discoKey in a context in which endpoint.mu is already held. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Brad Fitzpatrick	cf06f9df37	net/tstun, wgengine: add packet-level and drop metrics ... Primarily tstun work, but some MagicDNS stuff spread into wgengine. No wireguard reconfig metrics (yet). Updates #3307 Change-Id: Ide768848d7b7d0591e558f118b553013d1ec94ad Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	7901289578	wgengine/magicsock: add a stress test ... And add a peerMap validate method that checks its internal invariants. Updates tailscale/corp#3016 Change-Id: I23708e68ed44d81986d9e2be82029d4555547592 Co-authored-by: Brad Fitzpatrick <bradfitz@tailscale.com> Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Josh Bleecher Snyder	5a60781919	wgengine/magicsock: increase TestDiscokeyChange connection timeout ... I believe that this should eliminate the flakiness. If GitHub CI manages to be even slower that can be believed (and I can believe a lot at this point), then we should roll this back and make some more invasive changes. Updates #654 Fixes #3247 (I hope) Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Josh Bleecher Snyder	773af7292b	wgengine/magicsock: simplify peerMap.upsertEndpoint ... We can do the "maybe delete" check unilaterally: In the case of an insert, both oldDiscoKey and ep.discoKey will be the zero value. And since we don't use pi again, we can skip giving it a name, which makes scoping clearer. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Josh Bleecher Snyder	9da22dac3d	wgengine/magicsock: fix bug in peerMap.upsertEndpoint ... Found by inspection by David Crawshaw while investigating tailscale/corp#3016. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Josh Bleecher Snyder	16870cb754	wgengine/magicsock: fix typo in comment ... Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
David Anderson	41da7620af	go.mod: update wireguard-go to pick up roaming toggle ... wgengine/wgcfg: introduce wgcfg.NewDevice helper to disable roaming at all call sites (one real plus several tests). Fixes tailscale/corp#3016. Signed-off-by: David Anderson <danderson@tailscale.com> Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Brad Fitzpatrick	24ea365d48	netcheck, controlclient, magicsock: add more metrics ... Updates #3307 Change-Id: Ibb33425764a75bde49230632f1b472f923551126 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	57b039c51d	util/clientmetrics: add new package to add metrics to the client ... And annotate magicsock as a start. And add localapi and debug handlers with the Prometheus-format exporter. Updates #3307 Change-Id: I47c5d535fe54424741df143d052760387248f8d3 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
David Anderson	0532eb30db	all: replace tailcfg.DiscoKey with key.DiscoPublic. ... Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
Josh Bleecher Snyder	c467ed0b62	wgengine/wgcfg: always close io.Pipe ... In DeviceConfig, we did not close r after calling FromUAPI. If FromUAPI returned early due to an error, then it might not have read all the data that IpcGetOperation wanted to write. As a result, IpcGetOperation could hang, as in #3220. We were also closing the wrong end of the pipe after IpcSetOperation in ReconfigDevice. To ensure that we get all available information to diagnose such a situation, include all errors anytime something goes wrong. This should fix the immediate crashing problem in #3220. We'll then need to figure out why IpcGetOperation was failing. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Josh Bleecher Snyder	3fd5f4380f	util/multierr: new package ... github.com/go-multierror/multierror served us well. But we need a few feature from it (implement Is), and it's not worth maintaining a fork of such a small module. Instead, I did a clean room implementation inspired by its API. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
David Anderson	7e6a1ef4f1	tailcfg: use key.NodePublic in wire protocol types. ... Updates #3206. Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Anderson	c17250cee2	ipn/ipnstate: use key.NodePublic instead of tailcfg.NodeKey. ... Updates #3206 Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Anderson	c3d7115e63	wgengine: use key.NodePublic instead of tailcfg.NodeKey. ... Updates #3206 Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Anderson	72ace0acba	wgengine/magicsock: use key.NodePublic instead of tailcfg.NodeKey. ... Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Anderson	d6e7cec6a7	types/netmap: use key.NodePublic instead of tailcfg.NodeKey. ... Update #3206 Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
Brad Fitzpatrick	408b0923a6	wgengine/router: remove last non-test "ip" command usage on Linux ... Updates #391 Change-Id: Ic2c3f8460b1e4b8d34b936a1725705fcc1effbae Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	ff1954cfd9	wgengine/router: use netlink for ip rules on Linux ... Using temporary netlink fork in github.com/tailscale/netlink until we get the necessary changes upstream in either vishvananda/netlink or jsimonetti/rtnetlink. Updates #391 Change-Id: I6e1de96cf0750ccba53dabff670aca0c56dffb7c Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	5dc5bd8d20	cmd/tailscaled, wgengine/netstack: always wire up netstack ... Even if not in use. We plan to use it for more stuff later. (not for iOS or macOS-GUIs yet; only tailscaled) Change-Id: Idaef719d2a009be6a39f158fd8f57f8cca68e0ee Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
David Anderson	84c3a09a8d	types/key: export constants for key size, not a method. ... Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Anderson	6422789ea0	disco: use key.NodePublic instead of tailcfg.NodeKey. ... Updates #3206 Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Anderson	418adae379	various: use NodePublic.AsNodeKey() instead of tailcfg.NodeKeyFromNodePublic() ... Updates #3206 Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Anderson	eeb97fd89f	various: remove remaining uses of key.NewPrivate. ... Updates #3206 Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Anderson	ccd36cb5b1	wgengine: remove use of legacy key parsing helper. ... Updates #3206 Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Anderson	ef241f782e	wgengine/magicsock: remove uses of tailcfg.DiscoKey. ... Updates #3206 Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Anderson	55b6753c11	wgengine/magicsock: remove use of key.{Public,Private}. ... Updates #3206 Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Anderson	c1d009b9e9	ipn/ipnstate: use key.NodePublic instead of the generic key.Public. ... Updates #3206. Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Anderson	37c150aee1	derp: use new node key type. ... Update #3206 Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
Brad Fitzpatrick	19189d7018	wgengine/router: add a addrFamily type [linux] ... In prep for more netlink-ification. Change-Id: I7c34a04001988107dc2583597aa4f26ddb887e91	3 years ago
David Anderson	e03fda7ae6	wgengine/magicsock: remove test uses of wgkey. ... Updates #3206 Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
Brad Fitzpatrick	7c40a5d440	wgengine/router: refactor in prep for Linux netlink-ification ... Pull out the list of policy routing rules to a data structure now shared between the add & delete paths, but to also be shared by the netlink paths in a future change. Updates #391 Change-Id: I119ab1c246f141d639006c808b61c585c3d67924 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Josh Bleecher Snyder	94fb42d4b2	all: use testingutil.MinAllocsPerRun ... There are a few remaining uses of testing.AllocsPerRun: Two in which we only log the number of allocations, and one in which dynamically calculate the allocations target based on a different AllocsPerRun run. This also allows us to tighten the "no allocs" test in wgengine/filter. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Josh Bleecher Snyder	1df865a580	wgengine/magicsock: allow even fewer allocs per UDP receive ... We improved things again for Go 1.18. Lock that in. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Josh Bleecher Snyder	c1d377078d	wgengine/magicsock: use testingutil.MinAllocsPerRun ... This speeds up and deflakes the test. Fixes #2826 (again) Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Brad Fitzpatrick	aad46bd9ff	wgengine/router: stop cleaning up old dev rules on Linux ... Anybody using that one old, unreleased version of Tailscale from over a year ago should've rebooted their machine by now to get various non-Tailscale security updates. :) Change-Id: If9e043cb008b20fcd6ddfd03756b3b23a9d7aeb5 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
David Anderson	c9bf773312	wgengine/magicsock: replace use of wgkey with new node key type. ... Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
Brad Fitzpatrick	d36c0d3566	wgengine/router: add debug test to enumerate rules ... No non-test changes. Updates #391 Change-Id: Ia88610c08e07a119d002e58250463cb4659b9f54 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
David Anderson	6e5175373e	types/netmap: use new node key type. ... Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Anderson	3164c7410e	wgengine/wgcfg: remove unused helper function. ... Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
Brad Fitzpatrick	dc2fbf5877	wgengine/router: start using netlink instead of 'ip' on Linux ... Converts up, down, add/del addresses, add/del routes. Not yet done: rules. Updates #391 Change-Id: I02554ca07046d18f838e04a626ba99bbd35266fb Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
David Anderson	a9c78910bd	wgengine/wgcfg: convert to use new node key type. ... Updates #3206 Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
Brad Fitzpatrick	b0b0a80318	net/netcheck: implement netcheck for js/wasm clients ... And the derper change to add a CORS endpoint for latency measurement. And a little magicsock change to cut down some log spam on js/wasm. Updates #3157 Change-Id: I5fd9e6f5098c815116ddc8ac90cbcd0602098a48 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Maisem Ali	85fa1b0d61	wgengine: fail NewUserspaceEngine if wireguard device doesn't come up ... Just something I ran across while debugging an unrelated failure. This is not in response to any bug/issue. Signed-off-by: Maisem Ali <maisem@tailscale.com>	3 years ago
David Crawshaw	0b62f26349	magicsock: remove test data race ... Speculative, I haven't been able to replicate it locally. Fixes #3156 Signed-off-by: David Crawshaw <crawshaw@tailscale.com>	3 years ago
Brad Fitzpatrick	ed3fb197ad	wgengine/magicsock: fix/disable a few misc things to get js/wasm working ... Updates #3157 Change-Id: Ie9e3a772bb9878584080bb257b32150492e26eaf Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	e25afc6656	wgengine/magicsock: don't try to determine endpoints on js/wasm ... Avoid netcheck, LocalAddr, etc. Updates #3157 Change-Id: Ibc875c787c0e101b8076e64833f4fcc809372815 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	6cb2705833	wgengine/magicsock: don't run UDP listeners on js/wasm ... Be DERP-only for now. (WebRTC can come later :)) Updates #3157 Change-Id: I56ebb3d914e37e8f4ab651306fd705b817ca381c Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	9310713bfb	all: fix some js/wasm compilation issues ... Change-Id: I05a3a4835e225a1e413ec3540a7c7e4a2d477084 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	c30fa5903d	wgengine/magicsock: remove peerMap.byDiscoKey map ... No longer used. Updates #3088 Change-Id: I0ced3f87baa4053d3838d3c4a828ed0293923825 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
David Crawshaw	3552d86525	wgengine/magicsock: turn down timeouts in tests ... Before: --- PASS: TestActiveDiscovery (11.78s) --- PASS: TestActiveDiscovery/facing_easy_firewalls (5.89s) --- PASS: TestActiveDiscovery/facing_nats (5.89s) --- PASS: TestActiveDiscovery/simple_internet (0.89s) After: --- PASS: TestActiveDiscovery (1.98s) --- PASS: TestActiveDiscovery/facing_easy_firewalls (0.99s) --- PASS: TestActiveDiscovery/facing_nats (0.99s) --- PASS: TestActiveDiscovery/simple_internet (0.89s) Signed-off-by: David Crawshaw <crawshaw@tailscale.com>	3 years ago
David Anderson	b956139b0c	wgengine/magicsock: track IP<>node mappings without relying on discokeys. ... Updates #3088. Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
Brad Fitzpatrick	7a243ae5b1	wgengine/magicsock: finish TODO to speed up peerMap.forEachEndpointWithDiscoKey ... Now that peerMap tracks the set of nodes for a DiscoKey. Updates #3088 Change-Id: I927bf2bdfd2b8126475f6b6acc44bc799fcb489f Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	11fdb14c53	wgengine/magicsock: don't check always-non-nil endpoint for nil-ness ... Continuation of 2aa5df7ac1, remove nil check because it can never be nil. (It previously was able to be nil.) Change-Id: I59cd9ad611dbdcbfba680ed9b22e841b00c9d5e6 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
David Anderson	e7eb46bced	wgengine/magicsock: add an explicit else branch to peerMap update. ... Clarifies that the replace+delete of peerinfo data is only when peerInfo already exists. Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
Maisem Ali	53199738fb	wgengine: don't try to delete legacy netfilter rules on synology. ... Signed-off-by: Maisem Ali <maisem@tailscale.com>	3 years ago
David Anderson	2aa5df7ac1	wgengine/magicsock: document and enforce that peerInfo.ep is non-nil. ... Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Anderson	521b44e653	wgengine/magicsock: move discoKey fields to the mutex-protected section. ... Fixes #3106 Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
Maisem Ali	27799a1a96	wgengine: only use AmbientCaps on DSM7+ ... Signed-off-by: Maisem Ali <maisem@tailscale.com>	3 years ago
Brad Fitzpatrick	a6d02dc122	wgengine/magicsock: track which NodeKey each DiscoKey was last for ... This adds new fields (currently unused) to discoInfo to track what the last verified (unambiguous) NodeKey a DiscoKey last mapped to, and when. Then on CallMeMaybe, Pong and on most Pings, we update the mapping from DiscoKey to the current NodeKey for that DiscoKey. Updates #3088 Change-Id: Idc4261972084dec71cf8ec7f9861fb9178eb0a4d Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	c759fcc7d3	wgengine/magicsock: fix data race with sync.Pool in error+logging path ... Fixes #3122 Change-Id: Ib52e84f9bd5813d6cf2e80ce5b2296912a48e064 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	75a7779b42	disco, wgengine/magicsock: send self node key in disco pings ... This lets clients quickly (sub-millisecond within a local LAN) map from an ambiguous disco key to a node key without waiting for a CallMeMaybe (over relatively high latency DERP). Updates #3088 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Joe Tsai	9af27ba829	cmd/cloner: mangle "go:generate" in cloner.go ... The "go generate" command blindly looks for "//go:generate" anywhere in the file regardless of whether it is truly a comment. Prevent this false positive in cloner.go by mangling the string to look less like "//go:generate". Signed-off-by: Joe Tsai <joetsai@digital-static.net>	3 years ago
Denton Gentry	def650b3e8	wgengine/magicsock: don't Rebind after STUN error if closed. ... https://github.com/tailscale/tailscale/pull/3014 added a rebind on STUN failure, which means there can now be a tailscale.com/wgengine/magicsock.(*RebindingUDPConn).ReadFromNetaddr in progress at the end of the test waiting for a STUN response which will never arrive. This causes a test flake due to the resource leak in those cases where the Conn decided to rebind. For whatever reason, it mostly flakes with Windows. If the Conn is closed, don't Rebind after a send error. Signed-off-by: Denton Gentry <dgentry@tailscale.com>	3 years ago
Brad Fitzpatrick	f55c2bccf5	wgengine/magicsock: don't call setAddrToDiscoLocked on DERP ping ... Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	569f70abfd	wgengine/magicsock: finish some renamings of discoEndpoint to endpoint ... Renames only; continuation of earlier 8049063d35 These kept confusing me while working on #3088 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	695df497ba	wgengine/magicsock: delete peerMap.endpointForDiscoKey, remove remaining caller ... The one remaining caller of peerMap.endpointForDiscoKey was making the improper assumption that there's exactly 1 node with a given DiscoKey in the network. That was the cause of #3088. Now that all the other callers have been updated to not use endpointForDiscoKey, there's no need to try to keep maintaining that prone-to-misuse index. Updates #3088 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	04fd94acd6	wgengine/magicsock: remove endpointForDiscoKey call from handleDiscoMessage ... A DiscoKey maps 1:n to endpoints. When we get a disco pong, we don't necessarily know which endpoint sent it to us. Ask them all. There will only usually be 1 (and in rare circumstances 2). So it's easier to ask all two rather than building new maps from the random ping TxID to its endpoint. Updates #3088 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	151b4415ca	wgengine/magicsock: remove endpoint parameter from handlePingLocked ... We can reply to a ping without knowing which exact node it's from. As long as it's in our netmap, it's safe to reply. If there's more than one node with that discokey, it doesn't matter who we're relpying to. Updates #3088 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	d86081f353	wgengine/magicsock: add new discoInfo type for DiscoKey state, move some fields ... As more prep for removing the false assumption that you're able to map from DiscoKey to a single peer, move the lastPingFrom and lastPingTime fields from the endpoint type to a new discoInfo type, effectively upgrading the old sharedDiscoKey map (which only held a *[32]byte nacl precomputed key as its value) to discoInfo which then includes that naclbox key. Then start plumbing it into handlePing in prep for removing the need for handlePing to take an endpoint parameter. Updates #3088 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	e5779f019e	wgengine/magicsock: move temporary endpoint lookup later, add TODO to remove ... Updates #3088 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	36a07089ee	wgengine/magicsock: remove redundant/wrong sharedDiscoKey delete ... The pass just after in this method handles cleaning up sharedDiscoKey. No need to do it wrong (assuming DiscoKey => 1 node) earlier. Updates #3088 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	3e80806804	wgengine/magicsock: pass src NodeKey to handleDiscoMessage for DERP disco msgs ... And then use it to avoid another lookup-by-DiscoKey. Updates #3088	3 years ago
Brad Fitzpatrick	82fa15fa3b	wgengine/magicsock: start removing endpointForDiscoKey ... It's not valid to assume that a discokey is globally unique. This removes the first two of the four callers. Updates #3088 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	14f9c75293	wgengine/router: ignore Linux ip route error adding dup route ... Updates #3060 Updates #391 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
nicksherron	f01ff18b6f	all: fix spelling mistakes ... Signed-off-by: nicksherron <nsherron90@gmail.com>	3 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
David Anderson	830f641c6b	wgengine/magicsock: update discokeys on netmap change. ... Fixes #3008. Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
Brad Fitzpatrick	29a8fb45d3	wgengine/netstack: include DNS.ExtraRecords in DNSMap ... So SOCKS5 dialer can dial HTTPS cert names, for instance. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	52737c14ac	wgengine/monitor: ignore ipsec link monitor events on iOS/macOS ... Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Denton Gentry	93c2882a2f	wgengine: flush DNS cache after major link change. ... Windows has a public dns.Flush used in router_windows.go. However that won't work for platforms like Linux, where we need a different flush mechanism for resolved versus other implementations. We're instead adding a FlushCaches method to the dns Manager, which can be made to work on all platforms as needed. Fixes https://github.com/tailscale/tailscale/issues/2132 Signed-off-by: Denton Gentry <dgentry@tailscale.com>	3 years ago
Josh Bleecher Snyder	d5ab18b2e6	cmd/cloner: add Clone context to regen struct assignments ... Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Josh Bleecher Snyder	a722e48cef	wgengine/magicsock: skip alloc test with -race ... Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Josh Bleecher Snyder	7693d36aed	all: close fake userspace engines when tests complete ... We were leaking FDs. In a few places, switch from defer to t.Cleanup. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Josh Bleecher Snyder	4bbf5a8636	cmd/cloner: reduce diff noise when changing command ... Spelling out the command to run for every type means that changing the command makes for a large, repetitive diff. Stop doing that. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Brad Fitzpatrick	dabeda21e0	net/tstun: block looped disco traffic ... Updates #1526 (maybe fixes? time will tell) Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	31c1331415	wgengine/magicsock: deflake TestReceiveFromAllocs ... 100 iterations isn't enough with background allocs happening apparently. 1000 seems to be reliable. Fixes #2826 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	2238814b99	wgengine/magicsock: fix crash introduced in recent cleanups ... Fixes #2801 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	640134421e	all: update tests to use tstest.MemLogger ... And give MemLogger a mutex, as one caller had, which does match the logf contract better. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	4c68b7df7c	tstest: add MemLogger bytes.Buffer wrapper with Logf method ... We use it tons of places. Updated three at least in this PR. Another use in next commit. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
David Crawshaw	9502b515f1	net/dns: replace resolver IPs with type for DoH ... We currently plumb full URLs for DNS resolvers from the control server down to the client. But when we pass the values into the net/dns package, we throw away any URL that isn't a bare IP. This commit continues the plumbing, and gets the URL all the way to the built in forwarder. (It stops before plumbing URLs into the OS configurations that can handle them.) For #2596 Signed-off-by: David Crawshaw <crawshaw@tailscale.com>	3 years ago
Brad Fitzpatrick	7bfd4f521d	cmd/tailscale: fix "tailscale ip $self-host-hostname" ... And in the process, fix the related confusing error messages from pinging your own IP or hostname. Fixes #2803 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
David Anderson	efe8020dfa	wgengine/magicsock: fix race condition in tests. ... AFAICT this was always present, the log read mid-execution was never safe. But it seems like the recent magicsock refactoring made the race much more likely. Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
Evan Anderson	000f90d4d7	wgengine/wglog: Fix docstring on wireguardGoString to match args ... @danderson linked this on Twitter and I noticed the mismatch. Signed-off-by: Evan Anderson <evan.k.anderson@gmail.com>	3 years ago
Brad Fitzpatrick	5bacbf3744	wgengine/magicsock, health, ipn/ipnstate: track DERP-advertised health ... And add health check errors to ipnstate.Status (tailscale status --json). Updates #2746 Updates #2775 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
David Anderson	daf54d1253	control/controlclient: remove TS_DEBUG_USE_DISCO=only. ... It was useful early in development when disco clients were the exception and tailscale logs were noisier than today, but now non-disco is the exception. Updates #2752 Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Anderson	954064bdfe	wgengine/wgcfg/nmcfg: don't configure peers who can't DERP or disco. ... Fixes #2770 Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Anderson	f90ac11bd8	wgengine: remove unnecessary magicConnStarted channel. ... Having removed magicconn.Start, there's no need to synchronize startup of other things to it any more. Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Anderson	bb10443edf	wgengine/wgcfg: use just the hexlified node key as the WireGuard endpoint. ... The node key is all magicsock needs to find the endpoint that WireGuard needs. Updates #2752 Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Anderson	d00341360f	wgengine/magicsock: remove unused debug knob. ... Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Anderson	dfd978f0f2	wgengine/magicsock: use NodeKey, not DiscoKey, as the trigger for lazy reconfig. ... Updates #2752 Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Anderson	4c27e2fa22	wgengine/magicsock: remove Start method from Conn. ... Over time, other magicsock refactors have made Start effectively a no-op, except that some other functions choose to panic if called before Start. Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Anderson	1a899344bd	wgengine/magicsock: don't store tailcfg.Nodes alongside endpoints. ... Updates #2752 Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Anderson	b2181608b5	wgengine/magicsock: eagerly create endpoints in SetNetworkMap. ... Updates #2752 Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
Emmanuel T Odeke	0daa32943e	all: add (*testing.B).ReportAllocs() to every benchmark ... This ensures that we can properly track and catch allocation slippages that could otherwise have been missed. Fixes #2748	3 years ago
David Anderson	44d71d1e42	wgengine/magicsock: fix race in test shutdown, again. ... We were returning an error almost, but not quite like errConnClosed in a single codepath, which could still trip the panic on reconfig in the test logic. Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Anderson	f09ede9243	wgengine/magicsock: don't configure eager WireGuard handshaking in tests. ... Our prod code doesn't eagerly handshake, because our disco layer enables on-demand handshaking. Configuring both peers to eagerly handshake leads to WireGuard handshake races that make TestTwoDevicePing flaky. Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Anderson	86d1c4eceb	wgengine/magicsock: ignore close races even harder. ... Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Anderson	8bacfe6a37	wgengine/magicsock: remove unused sendLogLimit limiter. ... Magicsock these days gets its logs limited by the global log limiter. Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Anderson	e151b74f93	wgengine/magicsock: remove opts.SimulatedNetwork. ... It only existed to override one test-only behavior with a different test-only behavior, in both cases working around an annoying feature of our CI environments. Instead, handle that weirdness entirely in the test code, with a tweaked TestOnlyPacketListener that gets injected. Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Anderson	58c1f7d51a	wgengine/magicsock: rename opts.PacketListener to TestOnlyPacketListener. ... The docstring said it was meant for use in tests, but it's specifically a special codepath that is _only_ used in tests, so make the claim stronger. Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Anderson	8049063d35	wgengine/magicsock: rename discoEndpoint to just endpoint. ... Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Anderson	f2d949e2db	wgengine/magicsock: fold findEndpoint into its only remaining caller. ... Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Anderson	fe2f89deab	wgengine/magicsock: fix rare shutdown race in test. ... Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Anderson	97693f2e42	wgengine/magicsock: delete legacy AddrSet endpoints. ... Instead of using the legacy codepath, teach discoEndpoint to handle peers that have a home DERP, but no disco key. We can still communicate with them, but only over DERP. Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Anderson	61c62f48d9	wgengine/bench: disable unused benchmark that relies on legacy magicsock. ... Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
Maisem Ali	fd4838dc57	wgengine/userspace: add support to automatically enable/disable the tailscale ... protocol in BIRD, when the node is a primary subnet router as determined by control. Signed-off-by: Maisem Ali <maisem@tailscale.com>	3 years ago
Brad Fitzpatrick	7fcf86a14a	wgengine: fix link monitor / magicsock Start race ... Fixes #2733 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	83906abc5e	wgengine/netstack: clarify a comment ... Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	1925fb584e	wgengine/netstack: fix crash in userspace netstack TCP forwarding ... Fixes #2658 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
slowy07	ac0353e982	fix: typo spelling grammar ... Signed-off-by: slowy07 <slowy.arfy@gmail.com>	3 years ago
Brad Fitzpatrick	37053801bb	wgengine/magicsock: restore a bit of logging on node becoming active ... Fixes #2695 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Denton Gentry	6731f934a6	Revert "wgengine: actively log FlushDNS." ... This log is quite verbose, it was only to be left in for one unstable build to help debug a user issue. This reverts commit 1dd2552032. Signed-off-by: Denton Gentry <dgentry@tailscale.com>	3 years ago
Denton Gentry	1dd2552032	wgengine: actively log FlushDNS. ... Intended to help in resolving customer issue with DNS caching. We currently exec `ipconfig /flushdns` from two places: - SetDNS(), which logs before invoking - here in router_windows, which doesn't We'd like to see a positive indication in logs that flushdns is being run. As this log is expected to be spammy, it is proposed to leave this in just long enough to do an unstable 1.13.x build and then revert it. They won't run an unsigned image that I build. Signed-off-by: Denton Gentry <dgentry@tailscale.com>	3 years ago
Josh Bleecher Snyder	6ef734e493	wgengine: predict min.Peers length across calls ... The number of peers we have will be pretty stable across time. Allocate roughly the right slice size. This reduces memory usage when there are many peers. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Josh Bleecher Snyder	adf696172d	wgengine/userspace: reduce allocations in getStatus ... Two optimizations. Use values instead of pointers. We were using pointers to make track the "peer in progress" easier. It's not too hard to do it manually, though. Make two passes through the data, so that we can size our return value accurately from the beginning. This is cheap enough compared to the allocation, which grows linearly in the number of peers, that it is worth doing. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Maisem Ali	5c383bdf5d	wgengine/router: pass in AmbientCaps when calling `ip rule` ... Signed-off-by: Maisem Ali <maisem@tailscale.com>	3 years ago
Brad Fitzpatrick	39610aeb09	wgengine/magicsock: move debug knobs to their own file, compile out on iOS ... No need for these knobs on iOS where you can set the environment variables anyway. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Josh Bleecher Snyder	a5da4ed981	all: gofmt with Go 1.17 ... This adds "//go:build" lines and tidies up existing "// +build" lines. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Brad Fitzpatrick	a729070252	net/tstun: add start of Linux TAP support, with DHCP+ARP server ... Still very much a prototype (hard-coded IPs, etc) but should be non-invasive enough to submit at this point and iterate from here. Updates #2589 Co-Author: David Crawshaw <crawshaw@tailscale.com> Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	f3c96df162	ipn/ipnstate: move tailscale status "active" determination to tailscaled ... Fixes #2579 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	b622c60ed0	derp,wgengine/magicsock: don't assume stringer is in $PATH for go:generate ... Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Josh Bleecher Snyder	9da4181606	tstime/rate: new package ... This is a simplified rate limiter geared for exactly our needs: A fast, mono.Time-based rate limiter for use in tstun. It was generated by stripping down the x/time/rate rate limiter to just our needs and switching it to use mono.Time. It removes one time.Now call per packet. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Josh Bleecher Snyder	f6e833748b	wgengine: use mono.Time ... Migrate wgengine to mono.Time for performance-sensitive call sites. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Josh Bleecher Snyder	8a3d52e882	wgengine/magicsock: use mono.Time ... magicsock makes multiple calls to Now per packet. Move to mono.Now. Changing some of the calls to use package mono has a cascading effect, causing non-per-packet call sites to also switch. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Brad Fitzpatrick	5c266bdb73	wgengine: re-set DNS config on Linux after a major link change ... Updates #2458 (maybe fixes it) Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	95a9adbb97	wgengine/netstack: implement UDP relaying to advertised subnets ... TCP was done in 662fbd4a09. This does the same for UDP. Tested by hand. Integration tests will have to come later. I'd wanted to do it in this commit, but the SOCKS5 server needed for interop testing between two userspace nodes doesn't yet support UDP and I didn't want to invent some whole new userspace packet injection interface at this point, as SOCKS seems like a better route, but that's its own bug. Fixes #2302 RELNOTE=netstack mode can now UDP relay to subnets Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	ecac74bb65	wgengine/netstack: fix doc comment ... Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	e4fecfe31d	wgengine/{monitor,router}: restore Linux ip rules when systemd deletes them ... Thanks. Fixes #1591 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	ed8587f90d	wgengine/router: take a link monitor ... Prep for #1591 which will need to make Linux's router react to changes that the link monitor observes. The router package already depended on the monitor package transitively. Now it's explicit. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Joe Tsai	9a0c8bdd20	util/deephash: make hash type opaque ... The fact that Hash returns a [sha256.Size]byte leaks details about the underlying hash implementation. This could very well be any other hashing algorithm with a possible different block size. Abstract this implementation detail away by declaring an opaque type that is comparable. While we are changing the signature of UpdateHash, rename it to just Update to reduce stutter (e.g., deephash.Update). Signed-off-by: Joe Tsai <joetsai@digital-static.net>	3 years ago
Josh Bleecher Snyder	4dbbd0aa4a	cmd/addlicense: add command to add licenseheaders to generated code ... And use it to make our stringer invocations match the existing code. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Josh Bleecher Snyder	c179580599	wgengine/magicsock: add debug envvar to force all traffic over DERP ... This would have been useful during debugging DERP issues recently. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Brad Fitzpatrick	e41193ec4d	wgengine/monitor: don't spam about Linux RTM_NEWRULE events ... The earlier 2ba36c294b started listening for ip rule changes and only cared about DELRULE events, buts its subscription included all rule events, including new ones, which meant we were then catching our own ip rule creations and logging about how they were unknown. Stop that log spam. Updates #1591 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	2ba36c294b	wgengine/monitor: subscribe to Linux ip rule events, log on rule deletes ... For debugging & working on #1591 where certain versions of systemd-networkd delete Tailscale's ip rule entries. Updates #1591 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Josh Bleecher Snyder	4f4dae32dd	wgengine/magicsock: fix latent data race in test ... logBufWriter had no serialization. It just so happens that none of its users currently ever log concurrently. Make it safe for concurrent use. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
julianknodt	fb06ad19e7	wgcfg: Switch to using mem.RO ... As Brad suggested, mem.RO allows for a lot of easy perf gains. There were also some smaller changes outside of mem.RO, such as using hex.Decode instead of hex.DecodeString. ``` name old time/op new time/op delta FromUAPI-8 14.7µs ± 3% 12.3µs ± 4% -16.58% (p=0.008 n=5+5) name old alloc/op new alloc/op delta FromUAPI-8 9.52kB ± 0% 7.04kB ± 0% -26.05% (p=0.008 n=5+5) name old allocs/op new allocs/op delta FromUAPI-8 77.0 ± 0% 29.0 ± 0% -62.34% (p=0.008 n=5+5) ``` Signed-off-by: julianknodt <julianknodt@gmail.com>	3 years ago
julianknodt	d349a3231e	wgcfg: use string cut instead of string split ... Signed-off-by: julianknodt <julianknodt@gmail.com>	3 years ago
julianknodt	664edbe566	wgcfg: add benchmark for FromUAPI ... Adds a benchmark for FromUAPI in wgcfg. It appears that it's not actually that slow, the main allocations are from the scanner and new config. Updates #1912. Signed-off-by: julianknodt <julianknodt@gmail.com>	3 years ago
Brad Fitzpatrick	7e7c4c1bbe	tailcfg: break DERPNode.DERPTestPort into DERPPort & InsecureForTests ... The DERPTestPort int meant two things before: which port to use, and whether to disable TLS verification. Users would like to set the port without disabling TLS, so break it into two options. Updates #1264 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	92077ae78c	wgengine/magicsock: make portmapping async ... Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	700badd8f8	util/deephash: move internal/deephash to util/deephash ... No code changes. Just a minor package doc addition about lack of API stability.	3 years ago
Maisem Ali	ec52760a3d	wgengine/router_windows: support toggling local lan access when using ... exit nodes. Signed-off-by: Maisem Ali <maisem@tailscale.com>	3 years ago
Brad Fitzpatrick	722859b476	wgengine/netstack: make SOCKS5 resolve names to IPv6 if self node when no IPv4 ... For instance, ephemeral nodes with only IPv6 addresses can now SOCKS5-dial out to names like "foo" and resolve foo's IPv6 address rather than foo's IPv4 address and get a "no route" (*tcpip.ErrNoRoute) error from netstack's dialer. Per https://github.com/tailscale/tailscale/issues/2268#issuecomment-870027626 which is only part of the isuse. Updates #2268 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
julianknodt	506c2fe8e2	cmd/tailscale: make netcheck use active DERP map, delete static copy ... After allowing for custom DERP maps, it's convenient to be able to see their latency in netcheck. This adds a query to the local tailscaled for the current DERPMap. Updates #1264 Signed-off-by: julianknodt <julianknodt@gmail.com>	3 years ago
Christine Dodrill	59e9b44f53	wgengine/filter: add a debug flag for filter logs (#2241) ... This uses a debug envvar to optionally disable filter logging rate limits by setting the environment variable TS_DEBUG_FILTER_RATE_LIMIT_LOGS to "all", and if it matches, the code will effectively disable the limits on the log rate by setting the limit to 1 millisecond. This should make sure that all filter logs will be captured. Signed-off-by: Christine Dodrill <xe@tailscale.com>	3 years ago
Brad Fitzpatrick	c45bfd4180	wgengine: make dnsIPsOverTailscale also consider DefaultResolvers ... Found during a failed experiment debugging something on Android. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	b92e2ebd24	wgengine/netstack: add Impl.DialContextUDP ... Unused so far, but eventually we'll want this for SOCKS5 UDP binds (we currently only do TCP with SOCKS5), and also for #2102 for forwarding MagicDNS upstream to Tailscale IPs over netstack. Updates #2102 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	45e64f2e1a	net/dns{,/resolver}: refactor DNS forwarder, send out of right link on macOS/iOS ... Fixes #2224 Fixes tailscale/corp#2045 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
David Crawshaw	4ce15505cb	wgengine: randomize client port if netmap says to ... For testing out #2187 Signed-off-by: David Crawshaw <crawshaw@tailscale.com>	3 years ago
David Crawshaw	5f8ffbe166	magicsock: add SetPreferredPort method ... Signed-off-by: David Crawshaw <crawshaw@tailscale.com>	3 years ago
Brad Fitzpatrick	80a4052593	cmd/tailscale, wgengine, tailcfg: don't assume LastSeen is present [mapver 20] ... Updates #2107 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Fletcher Nichol	a49df5cfda	wgenine/router: fix OpenBSD route creation ... The route creation for the `tun` device was augmented in #1469 but didn't account for adding IPv4 vs. IPv6 routes. There are 2 primary changes as a result: * Ensure that either `-inet` or `-inet6` was used in the [`route(8)`](https://man.openbsd.org/route) command * Use either the `localAddr4` or `localAddr6` for the gateway argument depending which destination network is being added The basis for the approach is based on the implementation from `router_userspace_bsd.go`, including the `inet()` helper function. Fixes #2048 References #1469 Signed-off-by: Fletcher Nichol <fnichol@nichol.ca>	3 years ago
Josh Bleecher Snyder	e92fd19484	wgengine/wglog: match upstream wireguard-go's code for wireguardGoString ... It is a bit faster. But more importantly, it matches upstream byte-for-byte, which ensures there'll be no corner cases in which we disagree. name old time/op new time/op delta SetPeers-8 3.58µs ± 0% 3.16µs ± 2% -11.74% (p=0.016 n=4+5) name old alloc/op new alloc/op delta SetPeers-8 2.53kB ± 0% 2.53kB ± 0% ~ (all equal) name old allocs/op new allocs/op delta SetPeers-8 99.0 ± 0% 99.0 ± 0% ~ (all equal) Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Brad Fitzpatrick	a321c24667	go.mod: update netaddr ... Involves minor IPSetBuilder.Set API change. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Josh Bleecher Snyder	ddf6c8c729	wgengine/magicsock: delete dead code ... Co-authored-by: Adrian Dewhurst <adrian@tailscale.com> Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
Josh Bleecher Snyder	1ece91cede	go.mod: upgrade wireguard-windows, de-fork wireguard-go ... Pull in the latest version of wireguard-windows. Switch to upstream wireguard-go. This requires reverting all of our import paths. Unfortunately, this has to happen at the same time. The wireguard-go change is very low risk, as that commit matches our fork almost exactly. (The only changes are import paths, CI files, and a go.mod entry.) So if there are issues as a result of this commit, the first place to look is wireguard-windows changes. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
Josh Bleecher Snyder	ceaaa23962	wgengine/wglog: cache strings ... We repeat many peers each time we call SetPeers. Instead of constructing strings for them from scratch every time, keep strings alive across iterations. name old time/op new time/op delta SetPeers-8 3.58µs ± 1% 2.41µs ± 1% -32.60% (p=0.000 n=9+10) name old alloc/op new alloc/op delta SetPeers-8 2.53kB ± 0% 1.30kB ± 0% -48.73% (p=0.000 n=10+10) name old allocs/op new allocs/op delta SetPeers-8 99.0 ± 0% 16.0 ± 0% -83.84% (p=0.000 n=10+10) We could reduce alloc/op 12% and allocs/op 23% if strs had type map[string]strCache instead of map[string]*strCache, but that wipes out the execution time impact. Given that re-use is the most common scenario, let's optimize for it. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
Josh Bleecher Snyder	73adbb7a78	wgengine: pass an addressable value to deephash.UpdateHash ... This makes deephash more efficient. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
Josh Bleecher Snyder	8bf2a38f29	go.mod: update wireguard-go, taking control over iOS memory usage from our fork ... Our wireguard-go fork used different values from upstream for package device's memory limits on iOS. This was the last blocker to removing our fork. These values are now vars rather than consts for iOS. c27ff9b9f6 Adjust them on startup to our preferred values. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
Josh Bleecher Snyder	25df067dd0	all: adapt to opaque netaddr types ... This commit is a mishmash of automated edits using gofmt: gofmt -r 'netaddr.IPPort{IP: a, Port: b} -> netaddr.IPPortFrom(a, b)' -w . gofmt -r 'netaddr.IPPrefix{IP: a, Port: b} -> netaddr.IPPrefixFrom(a, b)' -w . gofmt -r 'a.IP.Is4 -> a.IP().Is4' -w . gofmt -r 'a.IP.As16 -> a.IP().As16' -w . gofmt -r 'a.IP.Is6 -> a.IP().Is6' -w . gofmt -r 'a.IP.As4 -> a.IP().As4' -w . gofmt -r 'a.IP.String -> a.IP().String' -w . And regexps: \w*(.*)\.Port = (.*) -> $1 = $1.WithPort($2) \w*(.*)\.IP = (.*) -> $1 = $1.WithIP($2) And lots of manual fixups. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
Brad Fitzpatrick	5b52b64094	tsnet: add Tailscale-as-a-library package ... Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Josh Bleecher Snyder	ebcd7ab890	wgengine: remove wireguard-go DeviceOptions ... We no longer need them. This also removes the 32 bytes of prefix junk before endpoints. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
Josh Bleecher Snyder	aacb2107ae	all: add extra information to serialized endpoints ... magicsock.Conn.ParseEndpoint requires a peer's public key, disco key, and legacy ip/ports in order to do its job. We currently accomplish that by: * adding the public key in our wireguard-go fork * encoding the disco key as magic hostname * using a bespoke comma-separated encoding It's a bit messy. Instead, switch to something simpler: use a json-encoded struct containing exactly the information we need, in the form we use it. Our wireguard-go fork still adds the public key to the address when it passes it to ParseEndpoint, but now the code compensating for that is just a couple of simple, well-commented lines. Once this commit is in, we can remove that part of the fork and remove the compensating code. Signed-off-by: Josh Bleecher Snyder <josharian@gmail.com>	4 years ago
Josh Bleecher Snyder	98cae48e70	wgengine/wglog: optimize wireguardGoString ... The new code is ugly, but much faster and leaner. name old time/op new time/op delta SetPeers-8 7.81µs ± 1% 3.59µs ± 1% -54.04% (p=0.000 n=9+10) name old alloc/op new alloc/op delta SetPeers-8 7.68kB ± 0% 2.53kB ± 0% -67.08% (p=0.000 n=10+10) name old allocs/op new allocs/op delta SetPeers-8 237 ± 0% 99 ± 0% -58.23% (p=0.000 n=10+10) Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
Josh Bleecher Snyder	9356912053	wgengine/wglog: add BenchmarkSetPeer ... Because it showed up on hello profiles. Cycle through some moderate-sized sets of peers. This should cover the "small tweaks to netmap" and the "up/down cycle" cases. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
Brad Fitzpatrick	36a26e6a71	internal/deephash: rename from deepprint ... Yes, it printed, but that was an implementation detail for hashing. And coming optimization will make it print even less. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Josh Bleecher Snyder	773fcfd007	Revert "wgengine/bench: skip flaky test" ... This reverts commit d707e2f7e5. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
Josh Bleecher Snyder	68911f6778	wgengine/bench: ignore "engine closing" errors ... On benchmark completion, we shut down the wgengine. If we happen to poll for status during shutdown, we get an "engine closing" error. It doesn't hurt anything; ignore it. Fixes tailscale/corp#1776 Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
Brad Fitzpatrick	d707e2f7e5	wgengine/bench: skip flaky test ... Updates tailscale/corp#1776 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Josh Bleecher Snyder	8d2a90529e	wgengine/bench: hold lock in TrafficGen.GotPacket while calling first packet callback ... Without any synchronization here, the "first packet" callback can be delayed indefinitely, while other work continues. Since the callback starts the benchmark timer, this could skew results. Worse, if the benchmark manages to complete before the benchmark timer begins, it'll cause a data race with the benchmark shutdown performed by package testing. That is what is reported in #1881. This is a bit unfortunate, in that it means that users of TrafficGen have to be careful to keep this callback speedy and lightweight and to avoid deadlocks. Fixes #1881 Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
Josh Bleecher Snyder	a72fb7ac0b	wgengine/bench: handle multiple Engine status callbacks ... It is possible to get multiple status callbacks from an Engine. We need to wait for at least one from each Engine. Without limiting to one per Engine, wait.Wait can exit early or can panic due to a negative counter. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
Josh Bleecher Snyder	6618e82ba2	wgengine/bench: close Engines on benchmark completion ... This reduces the speed with which these benchmarks exhaust their supply fds. Not to zero unfortunately, but it's still helpful when doing long runs. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
Josh Bleecher Snyder	ddd85b9d91	wgengine/magicsock: rename discoEndpoint.wgEndpointHostPort to wgEndpoint ... Fields rename only. Part of the general effort to make our code agnostic about endpoint formatting. It's just a name, but it will soon be a misleading one; be more generic. Do this as a separate commit because it generates a lot of whitespace changes. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
Josh Bleecher Snyder	e0bd3cc70c	wgengine/magicsock: use netaddr.MustParseIPPrefix ... Delete our bespoke helper. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
Josh Bleecher Snyder	bc68e22c5b	all: s/CreateEndpoint/ParseEndpoint/ in docs ... Upstream wireguard-go renamed the interface method from CreateEndpoint to ParseEndpoint. I missed some comments. Fix them. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
Josh Bleecher Snyder	9bce1b7fc1	wgengine/wgcfg: make device test endpoint-format-agnostic ... By using conn.NewDefaultBind, this test requires that our endpoints be comprehensible to wireguard-go. Instead, use a no-op bind that treats endpoints as opaque strings. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
Josh Bleecher Snyder	73ad1f804b	wgengine/wgcfg: use autogenerated Clone methods ... Delete the manually written ones named Copy. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
Josh Bleecher Snyder	a0dacba877	wgengine/magicsock: simplify legacy endpoint DstToString ... Legacy endpoints (addrSet) currently reconstruct their dst string when requested. Instead, store the dst string we were given to begin with. In addition to being simpler and cheaper, this makes less code aware of how to interpret endpoint strings. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago