tailscale

Commit Graph

Author	SHA1	Message	Date
Joe Tsai	cfef47ddcc	wgengine: perform router reconfig for netlog-only changes (#6118 ) If the network logging configruation changes (and nothing else) we will tear down the network logger and start it back up. However, doing so will lose the router configuration state. Manually reconfigure it with the routing state. Signed-off-by: Joe Tsai <joetsai@digital-static.net>	2 years ago
Joe Tsai	48ddb3af2a	wgengine/netlog: enforce hard limit on network log message sizes (#6109 ) This is a temporary hack to prevent logtail getting stuck uploading the same excessive message over and over. A better solution will be discussed and implemented. Signed-off-by: Joe Tsai <joetsai@digital-static.net>	2 years ago
Joe Tsai	a3602c28bd	wgengine/netlog: embed the StableNodeID of the authoring node (#6105 ) This allows network messages to be annotated with which node it came from. Signed-off-by: Joe Tsai <joetsai@digital-static.net>	2 years ago
Joe Tsai	81fd259133	wgengine/magicsock: gather physical-layer statistics (#5925 ) There is utility in logging traffic statistics that occurs at the physical layer. That is, in order to send packets virtually to a particular tailscale IP address, what physical endpoints did we need to communicate with? This functionality logs IP addresses identical to what had always been logged in magicsock prior to #5823, so there is no increase in PII being logged. ExtractStatistics returns a mapping of connections to counts. The source is always a Tailscale IP address (without port), while the destination is some endpoint reachable on WAN or LAN. As a special case, traffic routed through DERP will use 127.3.3.40 as the destination address with the port being the DERP region. This entire feature is only enabled if data-plane audit logging is enabled on the tailnet (by default it is disabled). Example of type of information logged: ------------------------------------ Tx[P/s] Tx[B/s] Rx[P/s] Rx[B/s] PhysicalTraffic: 25.80 3.39Ki 38.80 5.57Ki 100.1.2.3 -> 143.11.22.33:41641 15.40 2.00Ki 23.20 3.37Ki 100.4.5.6 -> 192.168.0.100:41641 10.20 1.38Ki 15.60 2.20Ki 100.7.8.9 -> 127.3.3.40:2 0.20 6.40 0.00 0.00 Signed-off-by: Joe Tsai <joetsai@digital-static.net>	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
Aaron Klotz	a44687e71f	wgengine/winnet: invoke some COM methods directly instead of through IDispatch. Intermittently in the wild we are seeing failures when calling `INetworkConnection::GetNetwork`. It is unclear what the root cause is, but what is clear is that the error is happening inside the object's `IDispatch` invoker (as opposed to the method implementation itself). This patch replaces our wrapper for `INetworkConnection::GetNetwork` with an alternate implementation that directly invokes the method, instead of using `IDispatch`. I also replaced the implementations of `INetwork::SetCategory` and `INetwork::GetCategory` while I was there. This patch is speculative and tightly-scoped so that we could possibly add it to a dot-release if necessary. Updates https://github.com/tailscale/tailscale/issues/4134 Updates https://github.com/tailscale/tailscale/issues/6037 Signed-off-by: Aaron Klotz <aaron@tailscale.com>	2 years ago
Jordan Whited	a471681e28	wgengine/netstack: enable TCP SACK (#6066 ) TCP selective acknowledgement can improve throughput by an order of magnitude in the presence of loss. Signed-off-by: Jordan Whited <jordan@tailscale.com>	2 years ago
Andrew Dunham	74693793be	net/netcheck, tailcfg: track whether OS supports IPv6 We had previously added this to the netcheck report in #5087 but never copied it into the NetInfo struct. Additionally, add it to log lines so it's visible to support. Change-Id: Ib6266f7c6aeb2eb2a28922aeafd950fe1bf5627e Signed-off-by: Andrew Dunham <andrew@tailscale.com>	2 years ago
Maisem Ali	74637f2c15	wgengine/router: [linux] add before deleting interface addrs Deleting may temporarily result in no addrs on the interface, which results in all other rules (like routes) to get dropped by the OS. I verified this fixes the problem. Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 years ago
phirework	d13c9cdfb4	wgengine/magicsock: set up pathfinder (#5994 ) Sets up new file for separate silent disco goroutine, tentatively named pathfinder for now. Updates #540 Co-authored-by: Brad Fitzpatrick <bradfitz@tailscale.com> Signed-off-by: Jenny Zhang <jz@tailscale.com>	2 years ago
Brad Fitzpatrick	deac82231c	wgengine/magicsock: add start of alternate send path During development of silent disco (#540), an alternate send policy for magicsock that doesn't wake up the radio frequently with heartbeats, we want the old & new policies to coexist, like we did previously pre- and post-disco. We started to do that earlier in `5c42990c2f` but only set up the env+control knob plumbing to set a bool about which path should be used. This starts to add a way for the silent disco code to update the send path from a separate goroutine. (Part of the effort is going to de-state-machinify the event based soup that is the current disco code and make it more Go synchronous style.) So far this does nothing. (It does add an atomic load on each send but that should be noise in the grand scheme of things, and a even more rare atomic store of nil on node config changes.) Baby steps. Updates #540 Co-authored-by: Jenny Zhang <jz@tailscale.com> Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Joe Tsai	14100c0985	wgengine/magicsock: restore allocation-free endpoint.DstToString (#5971 ) The wireguard-go code unfortunately calls this unconditionally even when verbose logging is disabled. Partial revert of #5911. Signed-off-by: Joe Tsai <joetsai@digital-static.net>	2 years ago
Joe Tsai	9ee3df02ee	wgengine/magicsock: remove endpoint.wgEndpoint (#5911 ) This field seems seldom used and the documentation is wrong. It is simpler to just derive its original value dynamically when endpoint.DstToString is called. This method is potentially used by wireguard-go, but not in any code path is performance sensitive. All calls to it use it in conjunction with fmt.Printf, which is going to be slow anyways since it uses Go reflection. Signed-off-by: Joe Tsai <joetsai@digital-static.net>	2 years ago
Maisem Ali	3555a49518	net/dns: always attempt to read the OS config on macOS/iOS Also reconfigure DNS on iOS/macOS on link changes. Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 years ago
James Tucker	539c073cf0	wgengine/magicsock: set UDP socket buffer sizes to 7MB - At high data rates more buffer space is required in order to avoid packet loss during any cause of delay. - On slower machines more buffer space is required in order to avoid packet loss while decryption & tun writing is underway. - On higher latency network paths more buffer space is required in order to overcome BDP. - On Linux set with SO_*BUFFORCE to bypass net.core.{r,w}mem_max. - 7MB is the current default maximum on macOS 12.6 - Windows test is omitted, as Windows does not support getsockopt for these options. Signed-off-by: James Tucker <james@tailscale.com>	2 years ago
James Tucker	4ec6d41682	wgengine/router: fix MTU configuration on Windows Always set the MTU to the Tailscale default MTU. In practice we are missing applying an MTU for IPv6 on Windows prior to this patch. This is the simplest patch to fix the problem, the code in here needs some more refactoring. Fixes #5914 Signed-off-by: James Tucker <james@tailscale.com>	2 years ago
Joe Tsai	a1a43ed266	wgengine/netlog: add support for magicsock statistics (#5913 ) This sets up Logger to handle statistics at the magicsock layer, where we can correlate traffic between a particular tailscale IP address and any number of physical endpoints used to contact the node that hosts that tailscale address. We also export Message and TupleCounts to better document the JSON format that is being sent to the logging infrastructure. This commit does NOT yet enable the actual logging of magicsock statistics. That will be a future commit. Signed-off-by: Joe Tsai <joetsai@digital-static.net>	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	49bae7fd5c	wgengine: fix typo in Engine.PeerForIP (#5912 ) Signed-off-by: Joe Tsai <joetsai@digital-static.net>	2 years ago
Joe Tsai	1b4e4cc1e8	wgengine/netlog: new package for traffic flow logging (#5864 ) The Logger type managers a logtail.Logger for extracting statistics from a tstun.Wrapper. So long as Shutdown is called, it ensures that logtail and statistic gathering resources are properly cleared up. Signed-off-by: Joe Tsai <joetsai@digital-static.net>	2 years ago
Emmanuel T Odeke	680f8d9793	all: fix more resource leaks found by staticmajor Updates #5706 Signed-off-by: Emmanuel T Odeke <emmanuel@orijtech.com>	2 years ago
Joe Tsai	82f5f438e0	wgengine/wgcfg: plumb down audit log IDs (#5855 ) The node and domain audit log IDs are provided in the map response, but are ultimately going to be used in wgengine since that's the layer that manages the tstun.Wrapper. Do the plumbing work to get this field passed down the stack. Signed-off-by: Joe Tsai <joetsai@digital-static.net>	2 years ago
Brad Fitzpatrick	1841d0bf98	wgengine/magicsock: make debug-level stuff not logged by default And add a CLI/localapi and c2n mechanism to enable it for a fixed amount of time. Updates #1548 Change-Id: I71674aaf959a9c6761ff33bbf4a417ffd42195a7 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	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
Mihai Parparita	8343b243e7	all: consistently initialize Logf when creating tsdial.Dialers Most visible when using tsnet.Server, but could have resulted in dropped messages in a few other places too. Fixes #5743 Signed-off-by: Mihai Parparita <mihai@tailscale.com>	2 years ago
Josh Soref	d4811f11a0	all: fix spelling mistakes Signed-off-by: Josh Soref <2119212+jsoref@users.noreply.github.com>	2 years ago
Andrew Dunham	420d841292	wgengine: log subnet router decision at v1 if we have a BIRD client (#5786 ) Updates tailscale/coral#82 Change-Id: I398d75f7e178ff7c531ca09899c82cf974fc30c9 Signed-off-by: Andrew Dunham <andrew@tailscale.com>	2 years ago
Tom DNetto	ab591906c8	wgengine/router: Increase range of rule priorities when detecting mwan3 Context: https://github.com/tailscale/tailscale/pull/5588#issuecomment-1260655929 It seems that if the interface at index 1 is down, the rule is not installed. As such, we increase the range we detect up to 2004 in the hope that at least one of the interfaces 1-4 will be up. Signed-off-by: Tom DNetto <tom@tailscale.com>	2 years ago
Emmanuel T Odeke	f981b1d9da	all: fix resource leaks with missing .Close() calls Fixes #5706 Signed-off-by: Emmanuel T Odeke <emmanuel@orijtech.com>	2 years ago
Kyle Carberry	91794f6498	wgengine/magicsock: move firstDerp check after nil derpMap check This fixes a race condition which caused `c.muCond.Broadcast()` to never fire in the `firstDerp` if block. It resulted in `Close()` hanging forever. Signed-off-by: Kyle Carberry <kyle@carberry.com>	2 years ago
Andrew Dunham	0607832397	wgengine/netstack: always respond to 4via6 echo requests (#5712 ) As the comment in the code says, netstack should always respond to ICMP echo requests to a 4via6 address, even if the netstack instance isn't normally processing subnet traffic. Follow-up to #5709 Change-Id: I504d0776c5824071b2a2e0e687bc33e24f6c4746 Signed-off-by: Andrew Dunham <andrew@tailscale.com>	2 years ago
Andrew Dunham	b9b0bf65a0	wgengine/netstack: handle 4via6 packets when pinging (#5709 ) Change-Id: Ib6ebbaa11219fb91b550ed7fc6ede61f83262e89 Signed-off-by: Andrew Dunham <andrew@tailscale.com>	2 years ago
Brad Fitzpatrick	832031d54b	wgengine/magicsock: fix recently introduced data race From `5c42990c2f`, not yet released in a stable build. Caught by existing tests. Fixes #5685 Change-Id: Ia76bb328809d9644e8b96910767facf627830600 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
phirework	5c42990c2f	wgengine/magicsock: add client flag and envknob to disable heartbeat (#5638 ) Baby steps towards turning off heartbeat pings entirely as per #540. This doesn't change any current magicsock functionality and requires additional changes to send/disco paths before the flag can be turned on. Updates #540 Change-Id: Idc9a72748e74145b068d67e6dd4a4ffe3932efd0 Signed-off-by: Jenny Zhang <jz@tailscale.com> Signed-off-by: Jenny Zhang <jz@tailscale.com>	2 years ago
Eng Zer Jun	f0347e841f	refactor: move from io/ioutil to io and os packages The io/ioutil package has been deprecated as of Go 1.16 [1]. This commit replaces the existing io/ioutil functions with their new definitions in io and os packages. Reference: https://golang.org/doc/go1.16#ioutil Signed-off-by: Eng Zer Jun <engzerjun@gmail.com>	2 years ago
Brad Fitzpatrick	74674b110d	envknob: support changing envknobs post-init Updates #5114 Change-Id: Ia423fc7486e1b3f3180a26308278be0086fae49b Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	33ee2c058e	wgengine: update comments, remove redundant code in forceFullWireguardConfig Change-Id: I464a0bce36e3a362c7d7ace0e8d2dd77fa825ee2 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Tom DNetto	f6da2220d3	wgengine: set fwmark masks in netfilter & ip rules This change masks the bitspace used when setting and querying the fwmark on packets. This allows tailscaled to play nicer with other networking software on the host, assuming the other networking software is also using fwmarks & a different mask. IPTables / mark module has always supported masks, so this is safe on the netfilter front. However, busybox only gained support for parsing + setting masks in 1.33.0, so we make sure we arent such a version before we add the "/<mask>" syntax to an ip rule command. Signed-off-by: Tom DNetto <tom@tailscale.com>	2 years ago
David Anderson	7c49db02a2	wgengine/magicsock: don't use BPF receive when SO_MARK doesn't work. Fixes #5607 Signed-off-by: David Anderson <danderson@tailscale.com>	2 years ago
Tom DNetto	ed2b8b3e1d	wgengine/router: reduce routing rule priority for openWRT + mwan3 Fixes #3659 Signed-off-by: Tom DNetto <tom@tailscale.com> Co-authored-by: Ian Foster <ian@vorsk.com>	2 years ago
Colin Adler	9c8bbc7888	wgengine/magicsock: fix panic in http debug server Fixes an panic in `(*magicsock.Conn).ServeHTTPDebug` when the `recentPongs` ring buffer for an endpoint wraps around. Signed-off-by: Colin Adler <colin1adler@gmail.com>	2 years ago
Andrew Dunham	9240f5c1e2	wgengine/netstack: only accept connection after dialing (#5503 ) If we accept a forwarded TCP connection before dialing, we can erroneously signal to a client that we support IPv6 (or IPv4) without that actually being possible. Instead, we only complete the client's TCP handshake after we've dialed the outbound connection; if that fails, we respond with a RST. Updates #5425 (maybe fixes!) Signed-off-by: Andrew Dunham <andrew@tailscale.com>	2 years ago
James Tucker	672c2c8de8	wgengine/magicsock: add filter to ignore disco to old/other ports Incoming disco packets are now dropped unless they match one of the current bound ports, or have a zero port. The BPF filter passes all packets with a disco header to the raw packet sockets regardless of destination port (in order to avoid needing to reconfigure BPF on rebind). If a BPF enabled node has just rebound, due to restart or rebind, it may receive and reply to disco ping packets destined for ports other than those which are presently bound. If the pong is accepted, the pinging node will now assume that it can send WireGuard traffic to the pinged port - such traffic will not reach the node as it is not destined for a bound port. The zero port is ignored, if received. This is a speculative defense and would indicate a problem in the receive path, or the BPF filter. This condition is allowed to pass as it may enable traffic to flow, however it will also enable problems with the same symptoms this patch otherwise fixes. Fixes #5536 Signed-off-by: James Tucker <james@tailscale.com>	2 years ago
James Tucker	be140add75	wgengine/magicsock: fix regression in initial bind for js `1f959edeb0` introduced a regression for JS where the initial bind no longer occurred at all for JS. The condition is moved deeper in the call tree to avoid proliferation of higher level conditions. Updates #5537 Signed-off-by: James Tucker <james@tailscale.com>	2 years ago
James Tucker	1f959edeb0	wgengine/magicksock: remove nullability of RebindingUDPConns Both RebindingUDPConns now always exist. the initial bind (which now just calls rebind) now ensures that bind is called for both, such that they both at least contain a blockForeverConn. Calling code no longer needs to assert their state. Signed-off-by: James Tucker <james@tailscale.com>	2 years ago
Brad Fitzpatrick	56f6fe204b	go.mod, wgengine/wgint: bump wireguard-go For `b51010ba13` Change-Id: Ibf767dfad98aef7e9f0505d91c0d26f924e046d5 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
James Tucker	265b008e49	wgengine: fix race on endpoints in getStatus Signed-off-by: James Tucker <james@tailscale.com>	2 years ago
Brad Fitzpatrick	e470893ba0	wgengine/magicsock: use mak in another spot Change-Id: I0a46d6243371ae6d126005a2bd63820cb2d1db6b 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
Brad Fitzpatrick	9bd9f37d29	go.mod: bump wireguard/windows, which moves to using net/netip Updates #5162 Change-Id: If99a3f0000bce0c01bdf44da1d513f236fd7cdf8 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Andrew Dunham	e945d87d76	util/uniq: use generics instead of reflect (#5491 ) This takes 75% less time per operation per some benchmarks on my mac. Signed-off-by: Andrew Dunham <andrew@du.nham.ca>	2 years ago
James Tucker	90dc0e1702	wgengine: remove unused singleflight group Signed-off-by: James Tucker <james@tailscale.com>	2 years ago
Andrew Dunham	d6c3588ed3	wgengine/wgcfg: only write peer headers if necessary (#5449 ) On sufficiently large tailnets, even writing the peer header (~95 bytes) can result in a large amount of data that needs to be serialized and deserialized. Only write headers for peers that need to have their configuration changed. Signed-off-by: Andrew Dunham <andrew@tailscale.com>	2 years ago
James Tucker	81dba3738e	wgengine: remove all peer status from open timeout diagnostics Avoid contention from fetching status for all peers, and instead fetch status for a single peer. Updates tailscale/coral#72 Signed-off-by: James Tucker <james@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	08b3f5f070	wgengine/wgint: add shady temporary package to get at wireguard internals For #5451 Change-Id: I43482289e323ba9142a446d551ab7a94a467c43a Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Andrew Dunham	9b77ac128a	wgengine: print in-flight operations on watchdog trigger (#5447 ) In addition to printing goroutine stacks, explicitly track all in-flight operations and print them when the watchdog triggers (along with the time they were started at). This should make debugging watchdog failures easier, since we can look at the longest-running operation(s) first. Signed-off-by: Andrew Dunham <andrew@tailscale.com> Signed-off-by: Andrew Dunham <andrew@tailscale.com>	2 years ago
Andrew Dunham	e8f09d24c7	wgengine: use a singleflight.Group to reduce status contention (#5450 ) Updates tailscale/coral#72 Signed-off-by: Andrew Dunham <andrew@tailscale.com> Signed-off-by: Andrew Dunham <andrew@tailscale.com>	2 years ago
Kris Brandow	5d559141d5	wgengine/magicsock: remove mention of Start The Start method was removed in `4c27e2fa22`, but the comment on NewConn still mentioned it doesn't do anything until this method is called. Signed-off-by: Kris Brandow <kris.brandow@gmail.com>	2 years ago
Joe Tsai	32a1a3d1c0	util/deephash: avoid variadic argument for Update (#5372 ) Hashing []any is slow since hashing of interfaces is slow. Hashing of interfaces is slow since we pessimistically assume that cycles can occur through them and start cycle tracking. Drop the variadic signature of Update and fix callers to pass in an anonymous struct so that we are hashing concrete types near the root of the value tree. Signed-off-by: Joe Tsai <joetsai@digital-static.net> Signed-off-by: Joe Tsai <joetsai@digital-static.net>	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
Maisem Ali	a9f6cd41fd	all: use syncs.AtomicValue Signed-off-by: Maisem Ali <maisem@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
Maisem Ali	9bb5a038e5	all: use atomic.Pointer Also add some missing docs. Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 years ago
Brad Fitzpatrick	5381437664	logtail, net/portmapper, wgengine/magicsock: use fmt.Appendf Fixes #5206 Change-Id: I490bb92e774ce7c044040537e2cd864fcf1dbe5a Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	5f6abcfa6f	all: migrate code from netaddr.FromStdAddr to Go 1.18 With caveat https://github.com/golang/go/issues/53607#issuecomment-1203466984 that then requires a new wrapper. But a simpler one at least. Updates #5162 Change-Id: I0a5265065bfcd7f21e8dd65b2bd74cae90d76090 Signed-off-by: Brad Fitzpatrick <bradfitz@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
Brad Fitzpatrick	fb82299f5a	wgengine/magicsock: avoid RebindingUDPConn mutex in common read/write case Change-Id: I209fac567326f2e926bace2582dbc67a8bc94c78 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	116f55ff66	all: gofmt for Go 1.19 Updates #5210 Change-Id: Ib02cd5e43d0a8db60c1f09755a8ac7b140b670be 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	6a396731eb	all: use various net/netip parse funcs directly Mechanical change with perl+goimports. Changed {Must,}Parse{IP,IPPrefix,IPPort} to their netip variants, then goimports -d . Finally, removed the net/netaddr wrappers, to prevent future use. Updates #5162 Change-Id: I59c0e38b5fbca5a935d701645789cddf3d7863ad Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	7eaf5e509f	net/netaddr: start migrating to net/netip via new netaddr adapter package Updates #5162 Change-Id: Id7bdec303b25471f69d542f8ce43805328d56c12 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
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	d8cb5aae17	tailcfg, control/controlclient: add tailcfg.PeersChangedPatch [capver 33] This adds a lighter mechanism for endpoint updates from control. Change-Id: If169c26becb76d683e9877dc48cfb35f90cc5f24 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	469c30c33b	ipn/localapi: define a cert dir for Synology DSM6 Fixes #4060 Change-Id: I5f145d4f56f6edb14825268e858d419c55918673 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Mihai Parparita	06aa141632	wgengine/router: avoid unncessary routing configuration changes The iOS and macOS networking extension API only exposes a single setter for the entire routing and DNS configuration, and does not appear to do any kind of diffing or deltas when applying changes. This results in spurious "network changed" errors in Chrome, even when the `OneCGNATRoute` flag from `df9ce972c7` is used (because we're setting the same configuration repeatedly). Since we already keep track of the current routing and DNS configuration in CallbackRouter, use that to detect if they're actually changing, and only invoke the platform setter if it's actually necessary. Updates #3102 Signed-off-by: Mihai Parparita <mihai@tailscale.com>	2 years ago
kylecarbs	9280d39678	wgengine/netstack: close ipstack when netstack.Impl is closed Fixes netstack.Impl leaking goroutines after shutdown. Signed-off-by: kylecarbs <kyle@carberry.com>	2 years ago
James Tucker	76256d22d8	wgengine/router: windows: set SkipAsSource on IPv6 LL addresses Link-local addresses on the Tailscale interface are not routable. Ideally they would be removed, however, a concern exists that the operating system will attempt to re-add them which would lead to thrashing. Setting SkipAsSource attempts to avoid production of packets using the address as a source in any default behaviors. Before, in powershell: `ping (hostname)` would ping the link-local address of the Tailscale interface, and fail. After: `ping (hostname)` now pings the link-local address on the next highest priority metric local interface. Fixes #4647 Signed-off-by: James Tucker <james@tailscale.com>	2 years ago
Mihai Parparita	c41837842b	wasm: drop pprof dependency We can use the browser tools to profile, pprof adds 200K to the binary size. Updates #3157 Signed-off-by: Mihai Parparita <mihai@tailscale.com>	2 years ago
Mihai Parparita	27a1ad6a70	wasm: exclude code that's not used on iOS for Wasm too It has similar size constraints. Saves ~1.9MB from the Wasm build. Updates #3157 Signed-off-by: Mihai Parparita <mihai@tailscale.com>	2 years ago
Brad Fitzpatrick	69b535c01f	wgengine/netstack: replace a 1500 with a const + doc Per post-submit code review feedback of `1336fb740b` from @maisem. Change-Id: Ic5c16306cbdee1029518448642304981f77ea1fd Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	1336fb740b	wgengine/netstack: make netstack MTU be 1280 also Updates #3878 Change-Id: I1850085b32c8a40d85607b4ad433622c97d96a8d Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Tom	2903d42921	wgengine/router: delete hardcoded link-local address on Windows (#4740 ) Fixes #4647 It seems that Windows creates a link-local address for the TUN driver, seemingly based on the (fixed) adapter GUID. This results in a fixed MAC address, which for some reason doesn't handle loopback correctly. Given the derived link-local address is preferred for lookups (thanks LLMNR), traffic which addresses the current node by hostname uses this broken address and never works. To address this, we remove the broken link-local address from the wintun adapter. Signed-off-by: Tom DNetto <tom@tailscale.com>	3 years ago
Tom	fc5839864b	wgengine/netstack: handle multiple magicDNS queries per UDP socket (#4708 ) Fixes: #4686 Signed-off-by: Tom DNetto <tom@tailscale.com>	3 years ago
Tom	9343967317	wgengine/filter: preallocate some hot slices in MatchesFromFilterRules (#4672 ) Profiling identified this as a fairly hot path for growing a slice. Given this is only used in control & when a new packet filter is received, this shouldnt be hot in the client.	3 years ago
Mihai Parparita	561f7be434	wgengine/magicsock: remove unused metric We don't increment the metricRecvData anywhere, just the per-protocol ones. Signed-off-by: Mihai Parparita <mihai@tailscale.com>	3 years ago
Mihai Parparita	86069874c9	net/tstun, wgengine: use correct type for counter metrics We were marking them as gauges, but they are only ever incremented, thus counter is more appropriate. Signed-off-by: Mihai Parparita <mihai@tailscale.com>	3 years ago
Maisem Ali	fd99c54e10	tailcfg,all: change structs to []*dnstype.Resolver Signed-off-by: Maisem Ali <maisem@tailscale.com>	3 years ago
Maisem Ali	e409e59a54	cmd/cloner,util/codegen: refactor cloner internals to allow reuse Also run go generate again for Copyright updates. Signed-off-by: Maisem Ali <maisem@tailscale.com>	3 years ago
Brad Fitzpatrick	35111061e9	wgengine/netstack, ipn/ipnlocal: serve http://100.100.100.100/ For future stuff. Change-Id: I64615b8b2ab50b57e4eef1ca66fa72e3458cb4a9 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Tom	d1d6ab068e	net/dns, wgengine: implement DNS over TCP (#4598 ) * net/dns, wgengine: implement DNS over TCP Signed-off-by: Tom DNetto <tom@tailscale.com> * wgengine/netstack: intercept only relevant port/protocols to quad-100 Signed-off-by: Tom DNetto <tom@tailscale.com>	3 years ago
James Tucker	f9e86e64b7	*: use WireGuard where logged, printed or named Signed-off-by: James Tucker <james@tailscale.com>	3 years ago
James Tucker	ae483d3446	wgengine, net/packet, cmd/tailscale: add ICMP echo Updates tailscale/corp#754 Signed-off-by: James Tucker <james@tailscale.com>	3 years ago
Tom DNetto	2a0b5c21d2	net/dns/{., resolver}, wgengine: fix goroutine leak on shutdown Signed-off-by: Tom DNetto <tom@tailscale.com>	3 years ago
Tom DNetto	7f45734663	assorted: documentation and readability fixes This were intended to be pushed to #4408, but in my excitement I forgot to git push :/ better late than never. Signed-off-by: Tom DNetto <tom@tailscale.com>	3 years ago
Tom DNetto	9e77660931	net/tstun,wgengine/{.,netstack}: handle UDP magicDNS traffic in netstack This change wires netstack with a hook for traffic coming from the host into the tun, allowing interception and handling of traffic to quad-100. With this hook wired, magicDNS queries over UDP are now handled within netstack. The existing logic in wgengine to handle magicDNS remains for now, but its hook operates after the netstack hook so the netstack implementation takes precedence. This is done in case we need to support platforms with netstack longer than expected. Signed-off-by: Tom DNetto <tom@tailscale.com>	3 years ago
Tom DNetto	dc71d3559f	net/tstun,wgengine: split PreFilterOut into multiple hooks A subsequent commit implements handling of magicDNS traffic via netstack. Implementing this requires a hook for traffic originating from the host and hitting the tun, so we make another hook to support this. Signed-off-by: Tom DNetto <tom@tailscale.com>	3 years ago
Tom DNetto	9dee6adfab	cmd/tailscaled,ipn/ipnlocal,wgengine/...: pass dns.Manager into netstack Needed for a following commit which moves magicDNS handling into netstack. Signed-off-by: Tom DNetto <tom@tailscale.com>	3 years ago
Brad Fitzpatrick	6bed781259	all: gofmt all Well, goimports actually (which adds the normal import grouping order we do) Change-Id: I0ce1b1c03185f3741aad67c14a7ec91a838de389 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
James Tucker	1aa75b1c9e	wgengine/netstack: always set TCP keepalive Setting keepalive ensures that idle connections will eventually be closed. In userspace mode, any application configured TCP keepalive is effectively swallowed by the host kernel, and is not easy to detect. Failure to close connections when a peer tailscaled goes offline or restarts may result in an otherwise indefinite connection for any protocol endpoint that does not initiate new traffic. This patch does not take any new opinion on a sensible default for the keepalive timers, though as noted in the TODO, doing so likely deserves further consideration. Update #4522 Signed-off-by: James Tucker <james@tailscale.com>	3 years ago
Maisem Ali	80ba161c40	wgengine/monitor: do not ignore changes to pdp_ip* One current theory (among other things) on battery consumption is that magicsock is resorting to using the IPv6 over LTE even on WiFi. One thing that could explain this is that we do not get link change updates for the LTE modem as we ignore them in this list. This commit makes us not ignore changes to `pdp_ip` as a test. Updates #3363 Signed-off-by: Maisem Ali <maisem@tailscale.com>	3 years ago
Maisem Ali	2265587d38	wgengine/{,magicsock}: add metrics for rebinds and restuns Signed-off-by: Maisem Ali <maisem@tailscale.com>	3 years ago
Brad Fitzpatrick	910ae68e0b	util/mak: move tailssh's mapSet into a new package for reuse elsewhere Change-Id: Idfe95db82275fd2be6ca88f245830731a0d5aecf Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	53588f632d	Revert "wgengine/router,util/kmod: load & log xt_mark" This reverts commit `8d6793fd70`. Reason: breaks Android build (cgo/pthreads addition) We can try again next cycle. Change-Id: I5e7e1730a8bf399a8acfce546a6d22e11fb835d5 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
James Tucker	8d6793fd70	wgengine/router,util/kmod: load & log xt_mark Attempt to load the xt_mark kernel module when it is not present. If the load fails, log error information. It may be tempting to promote this failure to an error once it has been in use for some time, so as to avoid reaching an error with the iptables invocation, however, there are conditions under which the two stages may disagree - this change adds more useful breadcrumbs. Example new output from tailscaled running under my WSL2: ``` router: ensure module xt_mark: "/usr/sbin/modprobe xt_mark" failed: exit status 1; modprobe: FATAL: Module xt_mark not found in directory /lib/modules/5.10.43.3-microsoft-standard-WSL2 ``` Background: There are two places to lookup modules, one is `/proc/modules` "old", the other is `/sys/module/` "new". There was query_modules(2) in linux <2.6, alas, it is gone. In a docker container in the default configuration, you would get /proc/modules and /sys/module/ both populated. lsmod may work file, modprobe will fail with EPERM at `finit_module()` for an unpriviliged container. In a priviliged container the load may succeed, if some conditions are met. This condition should be avoided, but the code landing in this change does not attempt to avoid this scenario as it is both difficult to detect, and has a very uncertain impact. In an nspawn container `/proc/modules` is populated, but `/sys/module` does not exist. Modern `lsmod` versions will fail to gather most module information, without sysfs being populated with module information. In WSL2 modules are likely missing, as the in-use kernel typically is not provided by the distribution filesystem, and WSL does not mount in a module filesystem of its own. Notably the WSL2 kernel supports iptables marks without listing the xt_mark module in /sys/module, and /proc/modules is empty. On a recent kernel, we can ask the capabilities system about SYS_MODULE, that will help to disambiguate between the non-privileged container case and just being root. On older kernels these calls may fail. Update #4329 Signed-off-by: James Tucker <james@tailscale.com>	3 years ago
Maisem Ali	136f30fc92	wgengine/monitor: split the unexpected stringification log line It unfortuantely gets truncated because it's too long, split it into 3 different log lines to circumvent truncation. Signed-off-by: Maisem Ali <maisem@tailscale.com>	3 years ago
Maisem Ali	8e40bfc6ea	wgengine/monitor: ignore OS-specific uninteresting interfaces Currently we ignore these interfaces in the darwin osMon but then would consider it interesting when checking if anything had changed. Signed-off-by: Maisem Ali <maisem@tailscale.com>	3 years ago
Brad Fitzpatrick	0ce67ccda6	wgengine/router: make supportsV6NAT check catch more cases Updates #4459 Change-Id: Ic27621569d2739298e652769d10e38608c6012be Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Maisem Ali	3ffd88a84a	wgengine/monitor: do not set timeJumped on iOS/Android In `(Mon).Start` we don't run a timer to update `(Mon).lastWall` on iOS and Android as their sleep patterns are bespoke. However, in the debounce goroutine we would notice that the the wall clock hadn't been updated since the last event would assume that a time jump had occurred. This would result in non-events being considered as major-change events. This commit makes it so that `(*Mon).timeJumped` is never set to `true` on iOS and Android. Signed-off-by: Maisem Ali <maisem@tailscale.com>	3 years ago
Brad Fitzpatrick	16f3520089	all: add arbitrary capability support Updates #4217 RELNOTE=start of WhoIsResponse capability support Change-Id: I6522998a911fe49e2f003077dad6164c017eed9b Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	8ee044ea4a	ssh/tailssh: make the SSH server a singleton, register with LocalBackend Remove the weird netstack -> tailssh dependency and instead have tailssh register itself with ipnlocal when linked. This makes tailssh.server a singleton, so we can have a global map of all sessions. Updates #3802 Change-Id: Iad5caec3a26a33011796878ab66b8e7b49339f29 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	da14e024a8	tailcfg, ssh/tailssh: optionally support SSH public keys in wire policy And clean up logging. Updates #3802 Change-Id: I756dc2d579a16757537142283d791f1d0319f4f0 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	3ae701f0eb	net/tsaddr, wgengine/netstack: add IPv6 range that forwards to site-relative IPv4 This defines a new magic IPv6 prefix, fd7a:115c:a1e0:b1a::/64, a subset of our existing /48, where the final 32 bits are an IPv4 address, and the middle 32 bits are a user-chosen "site ID". (which must currently be 0000:00xx; the top 3 bytes must be zero for now) e.g., I can say my home LAN's "site ID" is "0000:00bb" and then advertise its 10.2.0.0/16 IPv4 range via IPv6, like: tailscale up --advertise-routes=fd7a:115c:a1e0:b1a::bb:10.2.0.0/112 (112 being /128 minuse the /96 v6 prefix length) Then people in my tailnet can: $ curl '[fd7a:115c:a1e0:b1a::bb:10.2.0.230]' <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" .... Updates #3616, etc RELNOTE=initial support for TS IPv6 addresses to route v4 "via" specific nodes Change-Id: I9b49b6ad10410a24b5866b9fbc69d3cae1f600ef Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
James Tucker	f4aad61e67	wgengine/monitor: ignore duplicate RTM_NEWADDRs Ignoring the events at this layer is the simpler path for right now, a broader change should follow to suppress irrelevant change events in a higher layer so as to avoid related problems with other monitoring paths on other platforms. This approach may also carry a small risk that it applies an at-most-once invariant low in the chain that could be assumed otherwise higher in the code. I adjusted the newAddrMessage type to include interface index rather than a label, as labels are not always supplied, and in particular on my test hosts they were consistently missing for ipv6 address messages. I adjusted the newAddrMessage.Addr field to be populated from Attributes.Address rather than Attributes.Local, as again for ipv6 .Local was always empty, and with ipv4 the .Address and .Local contained the same contents in each of my test environments. Update #4282 Signed-off-by: James Tucker <james@tailscale.com>	3 years ago
James Tucker	2f69c383a5	wgengine/monitor: add envknob TS_DEBUG_NETLINK While I trust the test behavior, I also want to assert the behavior in a reproduction environment, this envknob gives me the log information I need to do so. Update #4282 Signed-off-by: James Tucker <james@tailscale.com>	3 years ago
Tom	24bdcbe5c7	net/dns, net/dns/resolver, wgengine: refactor DNS request path (#4364 ) * net/dns, net/dns/resolver, wgengine: refactor DNS request path Previously, method calls into the DNS manager/resolver types handled DNS requests rather than DNS packets. This is fine for UDP as one packet corresponds to one request or response, however will not suit an implementation that supports DNS over TCP. To support PRs implementing this in the future, wgengine delegates all handling/construction of packets to the magic DNS endpoint, to the DNS types themselves. Handling IP packets at this level enables future support for both UDP and TCP. Signed-off-by: Tom DNetto <tom@tailscale.com>	3 years ago
James Tucker	c6ac29bcc4	wgengine/netstack: disable refsvfs2 leak tracking (#4378 ) In addition an envknob (TS_DEBUG_NETSTACK_LEAK_MODE) now provides access to set leak tracking to more useful values. Fixes #4309 Signed-off-by: James Tucker <james@tailscale.com>	3 years ago
Brad Fitzpatrick	e4d8d5e78b	net/packet, wgengine/netstack: remove workaround for old gvisor ECN bug Fixes #2642 Change-Id: Ic02251d24a4109679645d1c8336e0f961d0cce13 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Maisem Ali	6fecc16c3b	ipn/ipnlocal: do not process old status messages received out of order When `setWgengineStatus` is invoked concurrently from multiple goroutines, it is possible that the call invoked with a newer status is processed before a call with an older status. e.g. a status that has endpoints might be followed by a status without endpoints. This causes unnecessary work in the engine and can result in packet loss. This patch adds an `AsOf time.Time` field to the status to specifiy when the status was calculated, which later allows `setWgengineStatus` to ignore any status messages it receives that are older than the one it has already processed. Updates tailscale/corp#2579 Signed-off-by: Maisem Ali <maisem@tailscale.com>	3 years ago
James Tucker	445c04c938	wgengine: inject packetbuffers rather than bytes (#4220 ) Plumb the outbound injection path to allow passing netstack PacketBuffers down to the tun Read, where they are decref'd to enable buffer re-use. This removes one packet alloc & copy, and reduces GC pressure by pooling outbound injected packets. Fixes #2741 Signed-off-by: James Tucker <james@tailscale.com>	3 years ago
Brad Fitzpatrick	f2041c9088	all: use strings.Cut even more Change-Id: I943ce72c6f339589235bddbe10d07799c4e37979 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Josh Bleecher Snyder	0868329936	all: use any instead of interface{} My favorite part of generics. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Josh Bleecher Snyder	5f176f24db	go.mod: upgrade to the latest wireguard-go This pulls in a handful of fixes and an update to Go 1.18. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Brad Fitzpatrick	61ee72940c	all: use Go 1.18's strings.Cut More remain. Change-Id: I6ec562cc1f687600758deae1c9d7dbd0d04004cb Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Josh Bleecher Snyder	1b57b0380d	wgengine/magicsock: remove final alloc from ReceiveFrom And now that we don't have to play escape analysis and inlining games, simplify the code. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Josh Bleecher Snyder	08cf54f386	wgengine/magicsock: fix goMajorVersion for 1.18 ts release The version string changed slightly. Adapt. And always check the current Go version to prevent future accidental regressions. I would have missed this one had I not explicitly manually checked it. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Maisem Ali	07f48a7bfe	wgengine: handle nil netmaps when assigning isSubnetRouter. Fixes tailscale/coral#51 Signed-off-by: Maisem Ali <maisem@tailscale.com>	3 years ago
Brad Fitzpatrick	26f27a620a	wgengine/router: delete legacy netfilter rule cleanup [Linux] This was just cleanup for an ancient version of Tailscale. Any such machines have upgraded since then. Change-Id: Iadcde05b37c2b867f92e02ec5d2b18bf2b8f653a Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	c9eca9451a	ssh: make it build on darwin For local dev testing initially. Product-wise, it'll probably only be workable on the two unsandboxed builds. Updates #3802 Change-Id: Ic352f966e7fb29aff897217d79b383131bf3f92b Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Maisem Ali	72d8672ef7	tailcfg: make Node.Hostinfo a HostinfoView Signed-off-by: Maisem Ali <maisem@tailscale.com>	3 years ago
Brad Fitzpatrick	1b87e025e9	ssh/tailssh: move SSH code from wgengine/netstack to this new package Still largely incomplete, but in a better home now. Updates #3802 Change-Id: I46c5ffdeb12e306879af801b06266839157bc624 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	2db6cd1025	ipn/ipnlocal, wgengine/magicsock, logpolicy: quiet more logs Updates #1548 Change-Id: Ied169f872e93be2857890211f2e018307d4aeadc Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
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

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1301 Commits (280255acae604796a1113861f5a84e6fa2dc6121)