255 Commits (35c10373b5a33169a5e3dfd938bb8f5ddb4c6d82)

Author	SHA1	Message	Date
Joe Tsai	35c10373b5	types/logid: move logtail ID types here (#6336) ... Many packages reference the logtail ID types, but unfortunately pull in the transitive dependencies of logtail. Fix this problem by putting the log ID types in its own package with minimal dependencies. Signed-off-by: Joe Tsai <joetsai@digital-static.net>	2 years ago
Brad Fitzpatrick	ea25ef8236	util/set: add new set package for SetHandle type ... We use this pattern in a number of places (in this repo and elsewhere) and I was about to add a fourth to this repo which was crossing the line. Add this type instead so they're all the same. Also, we have another Set type (SliceSet, which tracks its keys in order) in another repo we can move to this package later. Change-Id: Ibbdcdba5443fae9b6956f63990bdb9e9443cefa9 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	e8cc78b1af	ipn/ipnserver: change Server to let LocalBackend be supplied async ... This is step 1 of de-special-casing of Windows and letting the LocalAPI HTTP server start serving immediately, even while the rest of the world (notably the Engine and its TUN device) are being created, which can take a few to dozens of seconds on Windows. With this change, the ipnserver.New function changes to not take an Engine and to return immediately, not returning an error, and let its Run run immediately. If its ServeHTTP is called when it doesn't yet have a LocalBackend, it returns an error. A TODO in there shows where a future handler will serve status before an engine is available. Future changes will: * delete a bunch of tailscaled_windows.go code and use this new API * add the ipnserver.Server ServerHTTP handler to await the engine being available * use that handler in the Windows GUI client Updates #6522 Change-Id: Iae94e68c235e850b112a72ea24ad0e0959b568ee Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	f45106d47c	ipn/ipnserver: move Windows-specific code to tailscaled_windows.go ... We'll eventually remove it entirely, but for now move get it out of ipnserver where it's distracting and move it to its sole caller. Updates #6522 Change-Id: I9c6f6a91bf9a8e3c5ea997952b7c08c81723d447 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	f3ba268a96	ipn/ipnserver: move BabysitProc to tailscaled_windows.go ... It's only used by Windows. No need for it to be in ipn/ipnserver, which we're trying to trim down. Change-Id: Idf923ac8b6cdae8b5338ec26c16fb8b5ea548071 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	0a842f353c	ipn/ipnserver: move more connection acceptance logic to LocalBackend ... Follow-up to #6467 and #6506. LocalBackend knows the server-mode state, so move more auth checking there, removing some bookkeeping from ipnserver.Server. Updates #6417 Updates tailscale/corp#8051 Change-Id: Ic5d14a077bf0dccc92a3621bd2646bab2cc5b837 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Aaron Klotz	033bd94d4c	cmd/tailscaled, wgengine/router: use wingoes/com for COM initialization instead of go-ole ... This patch removes the crappy, half-backed COM initialization used by `go-ole` and replaces that with the `StartRuntime` function from `wingoes`, a library I have started which, among other things, initializes COM properly. In particular, we should always be initializing COM to use the multithreaded apartment. Every single OS thread in the process becomes implicitly initialized as part of the MTA, so we do not need to concern ourselves as to whether or not any particular OS thread has initialized COM. Furthermore, we no longer need to lock the OS thread when calling methods on COM interfaces. Single-threaded apartments are designed solely for working with Win32 threads that have a message pump; any other use of the STA is invalid. Fixes https://github.com/tailscale/tailscale/issues/3137 Signed-off-by: Aaron Klotz <aaron@tailscale.com>	2 years ago
Brad Fitzpatrick	7bff7345cc	ipn/ipnauth: start splitting ipnserver into new ipnauth package ... We're trying to gut 90% of the ipnserver package. A lot will get deleted, some will move to LocalBackend, and a lot is being moved into this new ipn/ipnauth package which will be leaf-y and testable. This is a baby step towards moving some stuff to ipnauth. Update #6417 Updates tailscale/corp#8051 Change-Id: I28bc2126764f46597d92a2d72565009dc6927ee0 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	001f482aca	net/dns: make "direct" mode on Linux warn on resolv.conf fights ... Run an inotify goroutine and watch if another program takes over /etc/inotify.conf. Log if so. For now this only logs. In the future I want to wire it up into the health system to warn (visible in "tailscale status", etc) about the situation, with a short URL to more info about how you should really be using systemd-resolved if you want programs to not fight over your DNS files on Linux. Updates #4254 etc etc Change-Id: I86ad9125717d266d0e3822d4d847d88da6a0daaa Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	08e110ebc5	cmd/tailscale: make "up", "status" warn if routes and --accept-routes off ... Example output: # Health check: # - Some peers are advertising routes but --accept-routes is false Also, move "tailscale status" health checks to the bottom, where they won't be lost in large netmaps. Updates #2053 Updates #6266 Change-Id: I5ae76a0cd69a452ce70063875cd7d974bfeb8f1a Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	2daf0f146c	ipn/ipnlocal, wgengine/netstack: start handling ports for future serving ... Updates tailscale/corp#7515 Change-Id: I966e936e72a2ee99be8d0f5f16872b48cc150258 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	6d8320a6e9	ipn/{ipnlocal,localapi}: move most of cert.go to ipnlocal ... Leave only the HTTP/auth bits in localapi. Change-Id: I8e23fb417367f1e0e31483e2982c343ca74086ab Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	db2cc393af	util/dirwalk, metrics, portlist: add new package for fast directory walking ... This is similar to the golang.org/x/tools/internal/fastwalk I'd previously written but not recursive and using mem.RO. The metrics package already had some Linux-specific directory reading code in it. Move that out to a new general package that can be reused by portlist too, which helps its scanning of all /proc files: name old time/op new time/op delta FindProcessNames-8 2.79ms ± 6% 2.45ms ± 7% -12.11% (p=0.000 n=10+10) name old alloc/op new alloc/op delta FindProcessNames-8 62.9kB ± 0% 33.5kB ± 0% -46.76% (p=0.000 n=9+10) name old allocs/op new allocs/op delta FindProcessNames-8 2.25k ± 0% 0.38k ± 0% -82.98% (p=0.000 n=9+10) Change-Id: I75db393032c328f12d95c39f71c9742c375f207a Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	f4ff26f577	types/pad32: delete package ... Use Go 1.19's new 64-bit alignment ~hidden feature instead. Fixes #5356 Change-Id: Ifcbcb115875a7da01df3bc29e9e7feadce5bc956 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Joe Tsai	c21a3c4733	types/netlogtype: new package for network logging types (#6092) ... The netlog.Message type is useful to depend on from other packages, but doing so would transitively cause gvisor and other large packages to be linked in. Avoid this problem by moving all network logging types to a single package. We also update staticcheck to take in: 003d277bcf Signed-off-by: Joe Tsai <joetsai@digital-static.net>	2 years ago
Brad Fitzpatrick	35bee36549	portlist: use win32 calls instead of running netstat process [windows] ... Turns out using win32 instead of shelling out to child processes is a bit faster: name old time/op new time/op delta GetListIncremental-4 278ms ± 2% 0ms ± 7% -99.93% (p=0.000 n=8+10) name old alloc/op new alloc/op delta GetListIncremental-4 238kB ± 0% 9kB ± 0% -96.12% (p=0.000 n=10+8) name old allocs/op new allocs/op delta GetListIncremental-4 1.19k ± 0% 0.02k ± 0% -98.49% (p=0.000 n=10+10) Fixes #3876 (sadly) Change-Id: I1195ac5de21a8a8b3cdace5871d263e81aa27e91 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	3697609aaa	portlist: remove unix.Readlink allocs on Linux ... name old time/op new time/op delta GetList-8 11.2ms ± 5% 11.1ms ± 3% ~ (p=0.661 n=10+9) name old alloc/op new alloc/op delta GetList-8 83.3kB ± 1% 67.4kB ± 1% -19.05% (p=0.000 n=10+10) name old allocs/op new allocs/op delta GetList-8 2.89k ± 2% 2.19k ± 1% -24.24% (p=0.000 n=10+10) (real issue is we're calling this code as much as we are, but easy enough to make it efficient because it'll still need to be called sometimes in any case) Updates #5958 Change-Id: I90c20278d73e80315a840aed1397d24faa308d93 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Mihai Parparita	9d04ffc782	net/wsconn: add back custom wrapper for turning a websocket.Conn into a net.Conn ... We removed it in #4806 in favor of the built-in functionality from the nhooyr.io/websocket package. However, it has an issue with deadlines that has not been fixed yet (see nhooyr/websocket#350). Temporarily go back to using a custom wrapper (using the fix from our fork) so that derpers will stop closing connections too aggressively. Updates #5921 Signed-off-by: Mihai Parparita <mihai@tailscale.com>	2 years ago
Joe Tsai	f9120eee57	wgengine: start network logger in Userspace.Reconfig (#5908) ... If the wgcfg.Config is specified with network logging arguments, then Userspace.Reconfig starts up an asynchronous network logger, which is shutdown either upon Userspace.Close or when Userspace.Reconfig is called again without network logging or route arguments. Signed-off-by: Joe Tsai <joetsai@digital-static.net>	2 years ago
Joe Tsai	24ebf161e8	net/tstun: instrument Wrapper with statistics gathering (#5847) ... If Wrapper.StatisticsEnable is enabled, then per-connection counters are maintained. If enabled, Wrapper.StatisticsExtract must be periodically called otherwise there is unbounded memory growth. Signed-off-by: Joe Tsai <joetsai@digital-static.net>	2 years ago
Andrew Dunham	e5636997c5	wgengine: don't re-allocate trimmedNodes map (#5825) ... Change-Id: I512945b662ba952c47309d3bf8a1b243e05a4736 Signed-off-by: Andrew Dunham <andrew@tailscale.com>	2 years ago
Aaron Klotz	44f13d32d7	cmd/tailscaled, util/winutil: log Windows service diagnostics when the wintun device fails to install ... I added new functions to winutil to obtain the state of a service and all its depedencies, serialize them to JSON, and write them to a Logf. When tstun.New returns a wrapped ERROR_DEVICE_NOT_AVAILABLE, we know that wintun installation failed. We then log the service graph rooted at "NetSetupSvc". We are interested in that specific service because network devices will not install if that service is not running. Updates https://github.com/tailscale/tailscale/issues/5531 Signed-off-by: Aaron Klotz <aaron@tailscale.com>	2 years ago
Brad Fitzpatrick	9bdf0cd8cd	ipn/ipnlocal: add c2n /debug/{goroutines,prefs,metrics} ... * and move goroutine scrubbing code to its own package for reuse * bump capver to 45 Change-Id: I9b4dfa5af44d2ecada6cc044cd1b5674ee427575 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Andrew Dunham	b1867457a6	doctor: add package for running in-depth healthchecks; use in bugreport (#5413) ... Change-Id: Iaa4e5b021a545447f319cfe8b3da2bd3e5e5782b Signed-off-by: Andrew Dunham <andrew@du.nham.ca>	2 years ago
Brad Fitzpatrick	58abae1f83	net/dns/{publicdns,resolver}: add NextDNS DoH support ... NextDNS is unique in that users create accounts and then get user-specific DNS IPs & DoH URLs. For DoH, the customer ID is in the URL path. For IPv6, the IP address includes the customer ID in the lower bits. For IPv4, there's a fragile "IP linking" mechanism to associate your public IPv4 with an assigned NextDNS IPv4 and that tuple maps to your customer ID. We don't use the IP linking mechanism. Instead, NextDNS is DoH-only. Which means using NextDNS necessarily shunts all DNS traffic through 100.100.100.100 (programming the OS to use 100.100.100.100 as the global resolver) because operating systems can't usually do DoH themselves. Once it's in Tailscale's DoH client, we then connect out to the known NextDNS IPv4/IPv6 anycast addresses. If the control plane sends the client a NextDNS IPv6 address, we then map it to the corresponding NextDNS DoH with the same client ID, and we dial that DoH server using the combination of v4/v6 anycast IPs. Updates #2452 Change-Id: I3439d798d21d5fc9df5a2701839910f5bef85463 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Andrew Dunham	c72caa6672	wgengine/magicsock: use AF_PACKET socket + BPF to read disco messages ... This is entirely optional (i.e. failing in this code is non-fatal) and only enabled on Linux for now. Additionally, this new behaviour can be disabled by setting the TS_DEBUG_DISABLE_AF_PACKET environment variable. Updates #3824 Replaces #5474 Co-authored-by: Andrew Dunham <andrew@du.nham.ca> Signed-off-by: David Anderson <danderson@tailscale.com>	2 years ago
James Tucker	ad1cc6cff9	wgengine: use Go API rather than UAPI for status ... Signed-off-by: James Tucker <james@tailscale.com>	2 years ago
Brad Fitzpatrick	c66f99fcdc	tailcfg, control/controlclient, ipn/ipnlocal: add c2n (control-to-node) system ... This lets the control plane can make HTTP requests to nodes. Then we can use this for future things rather than slapping more stuff into MapResponse, etc. Change-Id: Ic802078c50d33653ae1f79d1e5257e7ade4408fd Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Maisem Ali	9197dd14cc	net/dns: [win] add MagicDNS entries to etc/hosts ... This works around the 2.3s delay in short name lookups when SNR is enabled. C:\Windows\System32\drivers\etc\hosts file. We only add known hosts that match the search domains, and we populate the list in order of Search Domains so that our matching algorithm mimics what Windows would otherwise do itself if SNR was off. Updates #1659 Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 years ago
Joe Tsai	03f7e4e577	util/hashx: move from sha256x (#5388)	2 years ago
Joe Tsai	1f7479466e	util/deephash: use sha256x (#5339) ... Switch deephash to use sha256x.Hash. We add sha256x.HashString to efficiently hash a string. It uses unsafe under the hood to convert a string to a []byte. We also modify sha256x.Hash to export the underlying hash.Hash for testing purposes so that we can intercept all hash.Hash calls. Performance: name old time/op new time/op delta Hash-24 19.8µs ± 1% 19.2µs ± 1% -3.01% (p=0.000 n=10+10) HashPacketFilter-24 2.61µs ± 0% 2.53µs ± 1% -3.01% (p=0.000 n=8+10) HashMapAcyclic-24 31.3µs ± 1% 29.8µs ± 0% -4.80% (p=0.000 n=10+9) TailcfgNode-24 1.83µs ± 1% 1.82µs ± 2% ~ (p=0.305 n=10+10) HashArray-24 344ns ± 2% 323ns ± 1% -6.02% (p=0.000 n=9+10) The performance gains is not as dramatic as sha256x over sha256 due to: 1. most of the hashing already occurring through the direct memory hashing logic, and 2. what does not go through direct memory hashing is slowed down by reflect. Signed-off-by: Joe Tsai <joetsai@digital-static.net>	2 years ago
Brad Fitzpatrick	ec9d13bce5	hostinfo, net/netcheck: use CutPrefix ... Updates #5309 Change-Id: I37e594cfd245784bf810c493de68a66d3ff20677 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Andrew Dunham	f0d6f173c9	net/netcheck: try ICMP if UDP is blocked (#5056) ... Signed-off-by: Andrew Dunham <andrew@du.nham.ca>	2 years ago
Tom DNetto	f50043f6cb	tka,types/key: remove dependency for tailcfg & types/ packages on tka ... Following the pattern elsewhere, we create a new tka-specific types package for the types that need to couple between the serialized structure types, and tka. Signed-off-by: Tom DNetto <tom@tailscale.com>	2 years ago
Brad Fitzpatrick	4950fe60bd	syncs, all: move to using Go's new atomic types instead of ours ... Fixes #5185 Change-Id: I850dd532559af78c3895e2924f8237ccc328449d Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Tom DNetto	4001d0bf25	assorted: plumb tka initialization & network-lock key into tailscaled ... - A network-lock key is generated if it doesn't already exist, and stored in the StateStore. The public component is communicated to control during registration. - If TKA state exists on the filesystem, a tailnet key authority is initialized (but nothing is done with it for now). Signed-off-by: Tom DNetto <tom@tailscale.com>	2 years ago
Brad Fitzpatrick	8725b14056	all: migrate more code code to net/netip directly ... Instead of going through the tailscale.com/net/netaddr transitional wrappers. Updates #5162 Change-Id: I3dafd1c2effa1a6caa9b7151ecf6edd1a3fda3dd Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Maisem Ali	eb32847d85	tailcfg: add CapabilityFileSharingTarget to identify FileTargets ... This adds the inverse to CapabilityFileSharingSend so that senders can identify who they can Taildrop to. Updates #2101 Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 years ago
Tom DNetto	47f91dd732	cmd/tailscale{,d}: update depaware ... Signed-off-by: Tom DNetto <tom@tailscale.com>	2 years ago
Brad Fitzpatrick	acc3b7f259	go.mod: bump inet.af/wf, tidy ... This removes inet.af/netaddr from go.{mod,sum}. Updates #5162 Change-Id: I7121e9fbb96d036cf188c51f0b53731570252d69 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	a12aad6b47	all: convert more code to use net/netip directly ... perl -i -npe 's,netaddr.IPPrefixFrom,netip.PrefixFrom,' $(git grep -l -F netaddr.) perl -i -npe 's,netaddr.IPPortFrom,netip.AddrPortFrom,' $(git grep -l -F netaddr. ) perl -i -npe 's,netaddr.IPPrefix,netip.Prefix,g' $(git grep -l -F netaddr. ) perl -i -npe 's,netaddr.IPPort,netip.AddrPort,g' $(git grep -l -F netaddr. ) perl -i -npe 's,netaddr.IP\b,netip.Addr,g' $(git grep -l -F netaddr. ) perl -i -npe 's,netaddr.IPv6Raw\b,netip.AddrFrom16,g' $(git grep -l -F netaddr. ) goimports -w . Then delete some stuff from the net/netaddr shim package which is no longer neeed. Updates #5162 Change-Id: Ia7a86893fe21c7e3ee1ec823e8aba288d4566cd8 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	7eaf5e509f	net/netaddr: start migrating to net/netip via new netaddr adapter package ... Updates #5162 Change-Id: Id7bdec303b25471f69d542f8ce43805328d56c12 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Maisem Ali	9514ed33d2	go.mod: bump gvisor.dev/gvisor ... Pick up https://github.com/google/gvisor/pull/7787 Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 years ago
Brad Fitzpatrick	6b71568eb7	util/cloudenv: add Azure support & DNS IPs ... And rewrite cloud detection to try to do only zero or one metadata discovery request for all clouds, only doing a first (or second) as confidence increases. Work remains for Windows, but a start. And add Cloud to tailcfg.Hostinfo, which helped with testing using "tailcfg debug hostinfo". Updates #4983 (Linux only) Updates #4984 Change-Id: Ib03337089122ce0cb38c34f724ba4b4812bc614e Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	aa37aece9c	ipn/ipnlocal, net/dns*, util/cloudenv: add AWS DNS support ... And remove the GCP special-casing from ipn/ipnlocal; do it only in the forwarder for *.internal. Fixes #4980 Fixes #4981 Change-Id: I5c481e96d91f3d51d274a80fbd37c38f16dfa5cb Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	88c2afd1e3	ipn/ipnlocal, net/dns*, util/cloudenv: specialize DNS config on Google Cloud ... This does three things: * If you're on GCP, it adds a *.internal DNS split route to the metadata server, so we never break GCP DNS names. This lets people have some Tailscale nodes on GCP and some not (e.g. laptops at home) without having to add a Tailnet-wide *.internal DNS route. If you already have such a route, though, it won't overwrite it. * If the 100.100.100.100 DNS forwarder has nowhere to forward to, it forwards it to the GCP metadata IP, which forwards to 8.8.8.8. This means there are never errNoUpstreams ("upstream nameservers not set") errors on GCP due to e.g. mangled /etc/resolv.conf (GCP default VMs don't have systemd-resolved, so it's likely a DNS supremacy fight) * makes the DNS fallback mechanism use the GCP metadata IP as a fallback before our hosted HTTP-based fallbacks I created a default GCP VM from their web wizard. It has no systemd-resolved. I then made its /etc/resolv.conf be empty and deleted its GCP hostnames in /etc/hosts. I then logged in to a tailnet with no global DNS settings. With this, tailscaled writes /etc/resolv.conf (direct mode, as no systemd-resolved) and sets it to 100.100.100.100, which then has regular DNS via the metadata IP and *.internal DNS via the metadata IP as well. If the tailnet configures explicit DNS servers, those are used instead, except for *.internal. This also adds a new util/cloudenv package based on version/distro where the cloud type is only detected once. We'll likely expand it in the future for other clouds, doing variants of this change for other popular cloud environments. Fixes #4911 RELNOTES=Google Cloud DNS improvements Change-Id: I19f3c2075983669b2b2c0f29a548da8de373c7cf Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	13d0b8e6a4	control/controlclient, net/dnscache: use typed singleflight fork ... Change-Id: I12be4c5a91ae3a812fe88d9b2d15526fdbb5a921 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Mihai Parparita	edc90ebc61	net/wsconn: remove homegrown wrapper for turning a websocket.Conn into a net.Conn ... The one from the nhooyr/websocket package seems to work equally well. Signed-off-by: Mihai Parparita <mihai@tailscale.com>	2 years ago
Brad Fitzpatrick	a9b4bf1535	ipn/ipnserver, cmd/tailscaled: fix peerapi on Windows ... We weren't wiring up netstack.Impl to the LocalBackend in some cases on Windows. This fixes Windows 7 when run as a service. Updates #4750 (fixes after pull in to corp repo) Change-Id: I9ce51b797710f2bedfa90545776b7628c7528e99 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Mihai Parparita	a9f32656f5	control/controlhttp: allow client and server to communicate over WebSockets ... We can't do Noise-over-HTTP in Wasm/JS (because we don't have bidirectional communication), but we should be able to do it over WebSockets. Reuses derp WebSocket support that allows us to turn a WebSocket connection into a net.Conn. Updates #3157 Signed-off-by: Mihai Parparita <mihai@tailscale.com>	2 years ago