tailscale

Commit Graph

Author	SHA1	Message	Date
Brad Fitzpatrick	a1abd12f35	cmd/tailscaled, net/tstun: build for aix/ppc64 At least in userspace-networking mode. Fixes #11361 Change-Id: I78d33f0f7e05fe9e9ee95b97c99b593f8fe498f2 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Aaron Klotz	4d5d669cd5	net/dns: unconditionally write NRPT rules to local settings We were being too aggressive when deciding whether to write our NRPT rules to the local registry key or the group policy registry key. After once again reviewing the document which calls itself a spec (see issue), it is clear that the presence of the DnsPolicyConfig subkey is the important part, not the presence of values set in the DNSClient subkey. Furthermore, a footnote indicates that the presence of DnsPolicyConfig in the GPO key will always override its counterpart in the local key. The implication of this is important: we may unconditionally write our NRPT rules to the local key. We copy our rules to the policy key only when it contains NRPT rules belonging to somebody other than us. Fixes https://github.com/tailscale/corp/issues/19071 Signed-off-by: Aaron Klotz <aaron@tailscale.com>	2 years ago
James Tucker	db760d0bac	cmd/tailscaled: move cleanup to an implicit action during startup This removes a potentially increased boot delay for certain boot topologies where they block on ExecStartPre that may have socket activation dependencies on other system services (such as systemd-resolved and NetworkManager). Also rename cleanup to clean up in affected/immediately nearby places per code review commentary. Fixes #11599 Signed-off-by: James Tucker <james@tailscale.com>	2 years ago
Brad Fitzpatrick	b0fbd85592	net/tsdial: partially fix "tailscale nc" (UserDial) on macOS At least in the case of dialing a Tailscale IP. Updates #4529 Change-Id: I9fd667d088a14aec4a56e23aabc2b1ffddafa3fe Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
alexelisenko	fe22032fb3	net/dns/{publicdns,resolver}: add start of Control D support Updates #7946 [@bradfitz fixed up version of #8417] Change-Id: I1dbf6fa8d525b25c0d7ad5c559a7f937c3cd142a Signed-off-by: alexelisenko <39712468+alexelisenko@users.noreply.github.com> Signed-off-by: Alex Paguis <alex@windscribe.com>	2 years ago
James Tucker	6e334e64a1	net/netcheck,wgengine/magicsock: align DERP frame receive time heuristics The netcheck package and the magicksock package coordinate via the health package, but both sides have time based heuristics through indirect dependencies. These were misaligned, so the implemented heuristic aimed at reducing DERP moves while there is active traffic were non-operational about 3/5ths of the time. It is problematic to setup a good test for this integration presently, so instead I added comment breadcrumbs along with the initial fix. Updates #8603 Signed-off-by: James Tucker <james@tailscale.com>	2 years ago
Brad Fitzpatrick	8d7894c68e	clientupdate, net/dns: fix some "tailsacle" typos Updates #cleanup Change-Id: I982175e74b0c8c5b3e01a573e5785e6596b7ac39 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
James Tucker	f384742375	net/packet: allow more ICMP errors We now allow some more ICMP errors to flow, specifically: - ICMP parameter problem in both IPv4 and IPv6 (corrupt headers) - ICMP Packet Too Big (for IPv6 PMTU) Updates #311 Updates #8102 Updates #11002 Signed-off-by: James Tucker <james@tailscale.com>	2 years ago
Asutorufa	e20ce7bf0c	net/dns: close ctx when close dns directManager Signed-off-by: Asutorufa <16442314+Asutorufa@users.noreply.github.com>	2 years ago
Percy Wegmann	8b8b315258	net/tstun: use gaissmai/bart instead of tempfork/device This implementation uses less memory than tempfork/device, which helps avoid OOM conditions in the iOS VPN extension when switching to a Tailnet with ExitNode routing enabled. Updates tailscale/corp#18514 Signed-off-by: Percy Wegmann <percy@tailscale.com>	2 years ago
Brad Fitzpatrick	a36cfb4d3d	tailcfg, ipn/ipnlocal, wgengine/magicsock: add only-tcp-443 node attr Updates tailscale/corp#17879 Change-Id: I0dc305d147b76c409cf729b599a94fa723aef0e0 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Anton Tolchanov	cf8948da5f	net/routetable: increase route limit used by the test I was running all tests while preparing a recent stable release, and this was failing because my computer is connected to a fairly large tailnet. ``` --- FAIL: TestGetRouteTable (0.01s) routetable_linux_test.go:32: expected at least one default route; ... ``` ``` $ ip route show table 52 \| wc -l 1051 ``` Updates #cleanup Signed-off-by: Anton Tolchanov <anton@tailscale.com>	2 years ago
Andrew Dunham	9884d06b80	net/interfaces: fix test hang on Darwin This test could hang because the subprocess was blocked on writing to the stdout pipe if we find the address we're looking for early in the output. Updates #cleanup Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I68d82c22a5d782098187ae6d8577e43063b72573	2 years ago
Andrew Dunham	62cf83eb92	go.mod: bump gvisor The `stack.PacketBufferPtr` type no longer exists; replace it with `*stack.PacketBuffer` instead. Updates #8043 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: Ib56ceff09166a042aa3d9b80f50b2aa2d34b3683	2 years ago
Andrew Dunham	3dd8ae2f26	net/tstun: fix spelling of "WireGuard" Updates #cleanup Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: Ida7e30f4689bc18f5f7502f53a0adb5ac3c7981a	2 years ago
Anton Tolchanov	8cc5c51888	health: warn about reverse path filtering and exit nodes When reverse path filtering is in strict mode on Linux, using an exit node blocks all network connectivity. This change adds a warning about this to `tailscale status` and the logs. Example in `tailscale status`: ``` - not connected to home DERP region 22 - The following issues on your machine will likely make usage of exit nodes impossible: [interface "eth0" has strict reverse-path filtering enabled], please set rp_filter=2 instead of rp_filter=1; see https://github.com/tailscale/tailscale/issues/3310 ``` Example in the logs: ``` 2024/02/21 21:17:07 health("overall"): error: multiple errors: not in map poll The following issues on your machine will likely make usage of exit nodes impossible: [interface "eth0" has strict reverse-path filtering enabled], please set rp_filter=2 instead of rp_filter=1; see https://github.com/tailscale/tailscale/issues/3310 ``` Updates #3310 Signed-off-by: Anton Tolchanov <anton@tailscale.com>	2 years ago
Nick Khyl	7ef1fb113d	cmd/tailscaled, ipn/ipnlocal, wgengine: shutdown tailscaled if wgdevice is closed Tailscaled becomes inoperative if the Tailscale Tunnel wintun adapter is abruptly removed. wireguard-go closes the device in case of a read error, but tailscaled keeps running. This adds detection of a closed WireGuard device, triggering a graceful shutdown of tailscaled. It is then restarted by the tailscaled watchdog service process. Fixes #11222 Signed-off-by: Nick Khyl <nickk@tailscale.com>	2 years ago
Nick Khyl	b42b9817b0	net/dns: do not wait for the interface registry key to appear if the windowsManager is being closed The WinTun adapter may have been removed by the time we're closing the dns.windowsManager, and its associated interface registry key might also have been deleted. We shouldn't use winutil.OpenKeyWait and wait for the interface key to appear when performing a cleanup as a part of the windowsManager shutdown. Updates #11222 Signed-off-by: Nick Khyl <nickk@tailscale.com>	2 years ago
Brad Fitzpatrick	e1bd7488d0	all: remove LenIter, use Go 1.22 range-over-int instead Updates #11058 Updates golang/go#65685 Change-Id: Ibb216b346e511d486271ab3d84e4546c521e4e22 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
mrrfv	ff1391a97e	net/dns/publicdns: add Mullvad family DNS to the list of known DoH servers Adds the new Mullvad family DNS server to the known DNS over HTTPS server list. Signed-off-by: mrrfv <rm-rfv-no-preserve-root@protonmail.com>	2 years ago
James Tucker	8d0d46462b	net/dns: timeout DOH requests after 10s without response headers If a client socket is remotely lost but the client is not sent an RST in response to the next request, the socket might sit in RTO for extended lengths of time, resulting in "no internet" for users. Instead, timeout after 10s, which will close the underlying socket, recovering from the situation more promptly. Updates #10967 Signed-off-by: James Tucker <james@tailscale.com>	2 years ago
James Tucker	651c4899ac	net/interfaces: reduce & cleanup logs on iOS We don't need a log line every time defaultRoute is read in the good case, and we now only log default interface updates that are actually changes. Updates #3363 Signed-off-by: James Tucker <james@tailscale.com>	2 years ago
Andrew Dunham	e8d2fc7f7f	net/tshttpproxy: log when we're using a proxy Updates #11196 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: Id6334c10f52f4cfbda9f03dc8096ab7a6c54a088	2 years ago
James Tucker	8fe504241d	net/ktimeout: add a package to set TCP user timeout Setting a user timeout will be a more practical tuning knob for a number of endpoints, this provides a way to set it. Updates tailscale/corp#17587 Signed-off-by: James Tucker <james@tailscale.com>	2 years ago
Andrew Dunham	70b7201744	net/dns: fix infinite loop when run on Amazon Linux 2023 This fixes an infinite loop caused by the configuration of systemd-resolved on Amazon Linux 2023 and how that interacts with Tailscale's "direct" mode. We now drop the Tailscale service IP from the OS's "base configuration" when we detect this configuration. Updates #7816 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I73a4ea8e65571eb368c7e179f36af2c049a588ee	2 years ago
Andrew Dunham	b0e96a6c39	net/dns: log more info when openresolv commands fail Updates #11129 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: Ic594868ba3bc31f6d3b0721ecba4090749a81f7f	2 years ago
Brad Fitzpatrick	2bd3c1474b	util/cmpx: delete now that we're using Go 1.22 Updates #11058 Change-Id: I09dea8e86f03ec148b715efca339eab8b1f0f644 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Andrew Dunham	fd94d96e2b	net/portmapper: support legacy "urn:dslforum-org" portmapping services These are functionally the same as the "urn:schemas-upnp-org" services with a few minor changes, and are still used by older devices. Support them to improve our ability to obtain an external IP on such networks. Updates #10911 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I05501fad9d6f0a3b8cf19fc95eee80e7d16cc2cf	2 years ago
Andrew Dunham	b45089ad85	net/portmapper: handle cases where we have no supported clients This no longer results in a nil pointer exception when we get a valid UPnP response with no supported clients. Updates #10911 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I6e3715a49a193ff5261013871ad7fff197a4d77e	2 years ago
kari-ts	c9fd166cc6	net/netmon: when a new network is added, trigger netmon update (#10840 ) Fixes #10107	2 years ago
Andrew Dunham	20f3f706a4	net/netutil: allow 16-bit 4via6 site IDs The prefix has space for 32-bit site IDs, but the validateViaPrefix function would previously have disallowed site IDs greater than 255. Fixes tailscale/corp#16470 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I4cdb0711dafb577fae72d86c4014cf623fa538ef	2 years ago
James Tucker	953fa80c6f	cmd/{derper,stund},net/stunserver: add standalone stun server Add a standalone server for STUN that can be hosted independently of the derper, and factor that back into the derper. Fixes #8434 Closes #8435 Closes #10745 Signed-off-by: James Tucker <james@tailscale.com>	2 years ago
Andrew Dunham	35c303227a	net/dns/resolver: add ID to verbose logs in forwarder To make it easier to correlate the starting/ending log messages. Updates #cleanup Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I2802d53ad98e19bc8914bc58f8c04d4443227b26	2 years ago
Andrea Gottardo	d9aeb30281	net/interfaces: handle iOS network transitions (#10680 ) Updates #8022 Updates #6075 On iOS, we currently rely on delegated interface information to figure out the default route interface. The NetworkExtension framework in iOS seems to set the delegate interface only once, upon the creation of the VPN tunnel. If a network transition (e.g. from Wi-Fi to Cellular) happens while the tunnel is connected, it will be ignored and we will still try to set Wi-Fi as the default route because the delegated interface is not getting updated as connectivity transitions. Here we work around this on the Swift side with a NWPathMonitor instance that observes the interface name of the first currently satisfied network path. Our Swift code will call into `UpdateLastKnownDefaultRouteInterface`, so we can rely on that when it is set. If for any reason the Swift machinery didn't work and we don't get any updates, here we also have some fallback logic: we try finding a hardcoded Wi-Fi interface called en0. If en0 is down, we fall back to cellular (pdp_ip0) as a last resort. This doesn't handle all edge cases like USB-Ethernet adapters or multiple Ethernet interfaces, but it is good enough to ensure connectivity isn't broken. I tested this on iPhones and iPads running iOS 17.1 and it appears to work. Switching between different cellular plans on a dual SIM configuration also works (the interface name remains pdp_ip0). Signed-off-by: Andrea Gottardo <andrea@tailscale.com>	2 years ago
Andrew Dunham	fa3639783c	net/portmapper: check returned epoch from PMP and PCP protocols If the epoch that we see during a Probe is less than the existing epoch, it means that the gateway has either restarted or reset its configuration, and an existing mapping is no longer valid. Reset any saved mapping(s) if we detect this case so that a future createOrGetMapping will not attempt to re-use it. Updates #10597 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: Ie3cddaf625cb94a29885f7a1eeea25dbf6b97b47	2 years ago
Andrew Lytvynov	2716250ee8	all: cleanup unused code, part 2 (#10670 ) And enable U1000 check in staticcheck. Updates #cleanup Signed-off-by: Andrew Lytvynov <awly@tailscale.com>	2 years ago
Nick Khyl	c9836b454d	net/netmon: fix goroutine leak in winMon if the monitor is never started When the portable Monitor creates a winMon via newOSMon, we register address and route change callbacks with Windows. Once a callback is hit, it starts a goroutine that attempts to send the event into messagec and returns. The newly started goroutine then blocks until it can send to the channel. However, if the monitor is never started and winMon.Receive is never called, the goroutines remain indefinitely blocked, leading to goroutine leaks and significant memory consumption in the tailscaled service process on Windows. Unlike the tailscaled subprocess, the service process creates but never starts a Monitor. This PR adds a check within the callbacks to confirm the monitor's active status, and exits immediately if the monitor hasn't started. Updates #9864 Signed-off-by: Nick Khyl <nickk@tailscale.com>	2 years ago
Andrew Lytvynov	1302bd1181	all: cleanup unused code, part 1 (#10661 ) Run `staticcheck` with `U1000` to find unused code. This cleans up about a half of it. I'll do the other half separately to keep PRs manageable. Updates #cleanup Signed-off-by: Andrew Lytvynov <awly@tailscale.com>	2 years ago
Andrew Dunham	3c333f6341	net/portmapper: add logs about obtained mapping(s) This logs additional information about what mapping(s) are obtained during the creation process, including whether we return an existing cached mapping. Updates #10597 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I9ff25071f064c91691db9ab0b9365ccc5f948d6e	2 years ago
Andrew Dunham	01286af82b	net/interfaces: better handle multiple interfaces in LikelyHomeRouterIP Currently, we get the "likely home router" gateway IP and then iterate through all IPs for all interfaces trying to match IPs to determine the source IP. However, on many platforms we know what interface the gateway is through, and thus we don't need to iterate through all interfaces checking IPs. Instead, use the IP address of the associated interface. This better handles the case where we have multiple interfaces on a system all connected to the same gateway, and where the first interface that we visit (as iterated by ForeachInterfaceAddress) isn't also the default internet route. Updates #8992 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I8632f577f1136930f4ec60c76376527a19a47d1f	2 years ago
Andrew Dunham	09136e5995	net/netutil: add function to check rp_filter value (#5703 ) Updates #4432 Change-Id: Ifc332a5747fc1feffdbb87437308cf8ecb21b0b0 Signed-off-by: Andrew Dunham <andrew@du.nham.ca>	2 years ago
Andrew Dunham	d05a572db4	net/portmapper: handle multiple UPnP discovery responses Instead of taking the first UPnP response we receive and using that to create port mappings, store all received UPnP responses, sort and deduplicate them, and then try all of them to obtain an external address. Updates #10602 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I783ccb1834834ee2a9ecbae2b16d801f2354302f	2 years ago
Andrew Dunham	727acf96a6	net/netcheck: use DERP frames as a signal for home region liveness This uses the fact that we've received a frame from a given DERP region within a certain time as a signal that the region is stil present (and thus can still be a node's PreferredDERP / home region) even if we don't get a STUN response from that region during a netcheck. This should help avoid DERP flaps that occur due to losing STUN probes while still having a valid and active TCP connection to the DERP server. RELNOTE=Reduce home DERP flapping when there's still an active connection Updates #8603 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: If7da6312581e1d434d5c0811697319c621e187a0	2 years ago
Andrew Dunham	bac4890467	net/portmapper: be smarter about selecting a UPnP device Previously, we would select the first WANIPConnection2 (and related) client from the root device, without any additional checks. However, some routers expose multiple UPnP devices in various states, and simply picking the first available one can result in attempting to perform a portmap with a device that isn't functional. Instead, mimic what the miniupnpc code does, and prefer devices that are (a) reporting as Connected, and (b) have a valid external IP address. For our use-case, we additionally prefer devices that have an external IP address that's a public address, to increase the likelihood that we can obtain a direct connection from peers. Finally, we split out fetching the root device (getUPnPRootDevice) from selecting the best service within that root device (selectBestService), and add some extensive tests for various UPnP server behaviours. RELNOTE=Improve UPnP portmapping when multiple UPnP services exist Updates #8364 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I71795cd80be6214dfcef0fe83115a5e3fe4b8753	2 years ago
Andrea Barisani	affe11c503	net/netcheck: only run HTTP netcheck for tamago clients Signed-off-by: Andrea Barisani <andrea@inversepath.com>	2 years ago
Denton Gentry	137e9f4c46	net/portmap: add test of Mikrotik Root Desc XML. Unfortunately in the test we can't reproduce the failure seen in the real system ("SOAP fault: UPnPError") Updates https://github.com/tailscale/tailscale/issues/8364 Signed-off-by: Denton Gentry <dgentry@tailscale.com>	2 years ago
Andrew Dunham	c4ccdd1bd1	net/interfaces: ensure we return valid 'self' IP in LikelyHomeRouterIP Before this fix, LikelyHomeRouterIP could return a 'self' IP that doesn't correspond to the gateway address, since it picks the first private address when iterating over the set interfaces as the 'self' IP, without checking that the address corresponds with the previously-detected gateway. This behaviour was introduced by accident in `aaf2df7`, where we deleted the following code: for _, prefix := range privatev4s { if prefix.Contains(gateway) && prefix.Contains(ip) { myIP = ip ok = true return } } Other than checking that 'gateway' and 'ip' were private IP addresses (which were correctly replaced with a call to the netip.Addr.IsPrivate method), it also implicitly checked that both 'gateway' and 'ip' were a part of the same prefix, and thus likely to be the same interface. Restore that behaviour by explicitly checking pfx.Contains(gateway), which, given that the 'ip' variable is derived from our prefix 'pfx', ensures that the 'self' IP will correspond to the returned 'gateway'. Fixes #10466 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: Iddd2ee70cefb9fb40071986fefeace9ca2441ee6	2 years ago
Aaron Klotz	64a26b221b	net/dns: use an additional registry setting to disable dynamic DNS updates for our interface on Windows Fixes #9775 Signed-off-by: Aaron Klotz <aaron@tailscale.com>	2 years ago
Juergen Knaack	c27aa9e7ff	net/dns: fix darwin dns resolver files putting each nameserver on one line in /etc/resolver/<domain> fixes: #10134 Signed-off-by: Juergen Knaack <jk@jk-1.de>	2 years ago
Ryan Petris	c4855fe0ea	Fix Empty Resolver Set Config.singleResolverSet returns true if all routes have the same resolvers, even if the routes have no resolvers. If none of the routes have a specific resolver, the default should be used instead. Therefore, check for more than 0 instead of nil. Signed-off-by: Ryan Petris <ryan@petris.net>	2 years ago
Andrew Dunham	e33bc64cff	net/dnsfallback: add singleflight to recursive resolver This prevents running more than one recursive resolution for the same hostname in parallel, which can use excessive amounts of CPU when called in a tight loop. Additionally, add tests that hit the network (when run with a flag) to test the lookup behaviour. Updates tailscale/corp#15261 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I39351e1d2a8782dd4c52cb04b3bd982eb651c81e	2 years ago
Jordan Whited	12d5c99b04	client/tailscale,ipn/{ipnlocal,localapi}: check UDP GRO config (#10071 ) Updates tailscale/corp#9990 Signed-off-by: Jordan Whited <jordan@tailscale.com>	2 years ago
James Tucker	b48b7d82d0	appc,ipn/ipnlocal,net/dns/resolver: add App Connector wiring when enabled in prefs An EmbeddedAppConnector is added that when configured observes DNS responses from the PeerAPI. If a response is found matching a configured domain, routes are advertised when necessary. The wiring from a configuration in the netmap capmap is not yet done, so while the connector can be enabled, no domains can yet be added. Updates tailscale/corp#15437 Signed-off-by: James Tucker <james@tailscale.com>	2 years ago
James Tucker	09fcbae900	net/dnscache: remove completed TODO The other IP types don't appear to be imported anymore, and after a scan through I couldn't see any substantial usage of other representations, so I think this TODO is complete. Updates #cleanup Signed-off-by: James Tucker <james@tailscale.com>	2 years ago
Andrew Dunham	57c5b5a77e	net/dns/recursive: update IP for b.root-servers.net As of 2023-11-27, the official IP addresses for b.root-servers.net will change to a new set, with the older IP addresses supported for at least a year after that date. These IPs are already active and returning results, so update these in our recursive DNS resolver package so as to be ready for the switchover. See: https://b.root-servers.org/news/2023/05/16/new-addresses.html Fixes #9994 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I29e2fe9f019163c9ec0e62bdb286e124aa90a487	2 years ago
Andrew Dunham	ef596aed9b	net/portmapper: avoid alloc in getUPnPErrorsMetric Updates #cleanup Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: Iea558024c038face24cc46584421998d10f13a66	2 years ago
Val	19e5f242e0	net/portmapper: convert UPnP metrics to new syncs.Map.LoadOrInit method Simplify UPnP error metrics by using the new syncs.Map.LoadOrInit method. Updates #cleanup Signed-off-by: Val <valerie@tailscale.com>	2 years ago
Brad Fitzpatrick	95faefd1f6	net/dnsfallback: disable recursive resolver for now It seems to be implicated in a CPU consumption bug that's not yet understood. Disable it until we understand. Updates tailscale/corp#15261 Change-Id: Ia6d0c310da6464dda79a70fc3c18be0782812d3f Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Denton Gentry	97ee3891f1	net/dns: use direct when NetworkManager has no systemd-resolved Endeavour OS, at least, uses NetworkManager 1.44.2 and does not use systemd-resolved behind the scenes at all. If we find ourselves in that situation, return "direct" not "systemd-resolved" Fixes https://github.com/tailscale/tailscale/issues/9687 Signed-off-by: Denton Gentry <dgentry@tailscale.com>	2 years ago
Maisem Ali	5297bd2cff	cmd/tailscaled,net/tstun: fix data race on start-up in TUN mode Fixes #7894 Change-Id: Ice3f8019405714dd69d02bc07694f3872bb598b8 Co-authored-by: Brad Fitzpatrick <bradfitz@tailscale.com> Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 years ago
Maisem Ali	9d96e05267	net/packet: split off checksum munging into different pkg The current structure meant that we were embedding netstack in the tailscale CLI and in the GUIs. This removes that by isolating the checksum munging to a different pkg which is only called from `net/tstun`. Fixes #9756 Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 years ago
Galen Guyer	04a8b8bb8e	net/dns: properly detect newer debian resolvconf Tailscale attempts to determine if resolvconf or openresolv is in use by running `resolvconf --version`, under the assumption this command will error when run with Debian's resolvconf. This assumption is no longer true and leads to the wrong commands being run on newer versions of Debian with resolvconf >= 1.90. We can now check if the returned version string starts with "Debian resolvconf" if the command is successful. Fixes #9218 Signed-off-by: Galen Guyer <galen@galenguyer.com>	2 years ago
Maisem Ali	78a083e144	types/ipproto: drop IPProto from IPProtoVersion Based on https://github.com/golang/go/wiki/CodeReviewComments#package-names. Updates #cleanup Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 years ago
Val	893bdd729c	disco,net/tstun,wgengine/magicsock: probe peer MTU Automatically probe the path MTU to a peer when peer MTU is enabled, but do not use the MTU information for anything yet. Updates #311 Signed-off-by: Val <valerie@tailscale.com>	2 years ago
Brad Fitzpatrick	7868393200	net/dns/resolver, ipnlocal: fix ExitDNS on Android and iOS Advertise it on Android (it looks like it already works once advertised). And both advertise & likely fix it on iOS. Yet untested. Updates #9672 Change-Id: If3b7e97f011dea61e7e75aff23dcc178b6cf9123 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Tom DNetto	da1b917575	net/tstun: finish wiring IPv6 NAT support Updates https://github.com/tailscale/corp/issues/11202 Updates ENG-991 Signed-off-by: Tom DNetto <tom@tailscale.com>	2 years ago
Andrew Dunham	91b9899402	net/dns/resolver: fix flaky test Updates #cleanup Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I2d073220bb6ac78ba88d8be35085cc23b727d69f	2 years ago
Andrew Dunham	286c6ce27c	net/dns/resolver: race UDP and TCP queries (#9544 ) Instead of just falling back to making a TCP query to an upstream DNS server when the UDP query returns a truncated query, also start a TCP query in parallel with the UDP query after a given race timeout. This ensures that if the upstream DNS server does not reply over UDP (or if the response packet is blocked, or there's an error), we can still make queries if the server replies to TCP queries. This also adds a new package, util/race, to contain the logic required for racing two different functions and returning the first non-error answer. Updates tailscale/corp#14809 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I4311702016c1093b1beaa31b135da1def6d86316	2 years ago
Tom DNetto	656a77ab4e	net/packet: implement methods for rewriting v6 addresses Implements the ability for the address-rewriting code to support rewriting IPv6 addresses. Specifically, UpdateSrcAddr & UpdateDstAddr. Signed-off-by: Tom DNetto <tom@tailscale.com> Updates https://github.com/tailscale/corp/issues/11202	2 years ago
Val	c26d91d6bd	net/tstun: remove unused function DefaultMTU() Now that corp is updated, remove the shim code to bridge the rename from DefaultMTU() to DefaultTUNMTU. Updates #311 Signed-off-by: Val <valerie@tailscale.com>	2 years ago
James Tucker	e03f0d5f5c	net/dnsfallback: remove net/dnsfallback go:generate line We should be able to freely run `./tool/go generate ./...`, but we're continually dodging this particular generator. Instead of constantly dodging it, let's just remove it. Updates #cleanup Signed-off-by: James Tucker <james@tailscale.com>	2 years ago
James Tucker	84acf83019	go.mod,net/dnsfallback: bump go4.org/netipx Updates #8043 Signed-off-by: James Tucker <james@tailscale.com>	2 years ago
Andrea Barisani	b5b4298325	go.mod,*: bump gvisor Updates #9253 Signed-off-by: Andrea Barisani <andrea@inversepath.com> Signed-off-by: James Tucker <james@tailscale.com>	2 years ago
Andrew Dunham	d31460f793	net/portmapper: fix invalid UPnP metric name Fixes #9551 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I06f3a15a668be621675be6cbc7e5bdcc006e8570	2 years ago
Val	c608660d12	wgengine,net,ipn,disco: split up and define different types of MTU Prepare for path MTU discovery by splitting up the concept of DefaultMTU() into the concepts of the Tailscale TUN MTU, MTUs of underlying network interfaces, minimum "safe" TUN MTU, user configured TUN MTU, probed path MTU to a peer, and maximum probed MTU. Add a set of likely MTUs to probe. Updates #311 Signed-off-by: Val <valerie@tailscale.com>	2 years ago
Andrew Dunham	530aaa52f1	net/dns: retry forwarder requests over TCP We weren't correctly retrying truncated requests to an upstream DNS server with TCP. Instead, we'd return a truncated request to the user, even if the user was querying us over TCP and thus able to handle a large response. Also, add an envknob and controlknob to allow users/us to disable this behaviour if it turns out to be buggy (✨ DNS ✨). Updates #9264 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: Ifb04b563839a9614c0ba03e9c564e8924c1a2bfd	2 years ago
Brad Fitzpatrick	241c983920	net/tstun: use untyped consts, simplify DefaultMTU func Updates #cleanup Change-Id: Ic9ad1d6134818699f777c66a31024e846dfdc5d4 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	3b32d6c679	wgengine/magicsock, controlclient, net/dns: reduce some logspam Updates #cleanup Change-Id: I78b0697a01e94baa33f3de474b591e616fa5e6af Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Val	6cc5b272d8	Revert "wgengine,net,ipn,disco: split up and define different types of MTU" This reverts commit `059051c58a`. Signed-off-by: Val <valerie@tailscale.com>	2 years ago
Val	059051c58a	wgengine,net,ipn,disco: split up and define different types of MTU Prepare for path MTU discovery by splitting up the concept of DefaultMTU() into the concepts of the Tailscale TUN MTU, MTUs of underlying network interfaces, minimum "safe" TUN MTU, user configured TUN MTU, probed path MTU to a peer, and maximum probed MTU. Add a set of likely MTUs to probe. Updates #311 Signed-off-by: Val <valerie@tailscale.com>	2 years ago
James Tucker	1c88a77f68	net/dns/publicdns: update Quad9 addresses and references One Quad9 IPv6 address was incorrect, and an additional group needed adding. Additionally I checked Cloudflare and included source reference URLs for both. Updates #cleanup Signed-off-by: James Tucker <james@tailscale.com>	2 years ago
Maisem Ali	3056a98bbd	net/tstun: add better logging of natV4Config It might as well have been spewing out gibberish. This adds a nicer output format for us to be able to read and identify whats going on. Sample output ``` natV4Config{nativeAddr: 100.83.114.95, listenAddrs: [10.32.80.33], dstMasqAddrs: [10.32.80.33: 407 peers]} ``` Fixes tailscale/corp#14650 Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 years ago
Tom DNetto	c08cf2a9c6	all: declare & plumb IPv6 masquerade address for peer This PR plumbs through awareness of an IPv6 SNAT/masquerade address from the wire protocol through to the low-level (tstun / wgengine). This PR is the first in two PRs for implementing IPv6 NAT support to/from peers. A subsequent PR will implement the data-plane changes to implement IPv6 NAT - this is just plumbing. Signed-off-by: Tom DNetto <tom@tailscale.com> Updates ENG-991	2 years ago
Andrew Dunham	d9ae7d670e	net/portmapper: add clientmetric for UPnP error codes This should allow us to gather a bit more information about errors that we encounter when creating UPnP mappings. Since we don't have a "LabelMap" construction for clientmetrics, do what sockstats does and lazily register a new metric when we see a new code. Updates #9343 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: Ibb5aadd6138beb58721f98123debcc7273b611ba	2 years ago
Brad Fitzpatrick	0d991249e1	types/netmap: remove NetworkMap.{Addresses,MachineStatus} And convert all callers over to the methods that check SelfNode. Now we don't have multiple ways to express things in tests (setting fields on SelfNode vs NetworkMap, sometimes inconsistently) and don't have multiple ways to check those two fields (often only checking one or the other). Updates #9443 Change-Id: I2d7ba1cf6556142d219fae2be6f484f528756e3c Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	926c990a09	types/netmap: start phasing out Addresses, add GetAddresses method NetworkMap.Addresses is redundant with the SelfNode.Addresses. This works towards a TODO to delete NetworkMap.Addresses and replace it with a method. This is similar to #9389. Updates #cleanup Change-Id: Id000509ca5d16bb636401763d41bdb5f38513ba0 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
James Tucker	8ab46952d4	net/ping: fix ICMP echo code field to 0 The code was trying to pass the ICMP protocol number here (1), which is not a valid code. Many servers will not respond to echo messages with codes other than 0. https://www.iana.org/assignments/icmp-parameters/icmp-parameters.xhtml#icmp-parameters-codes-8 Updates #9299 Signed-off-by: James Tucker <james@tailscale.com>	2 years ago
James Tucker	4c693d2ee8	net/dns/publicdns: update Mullvad DoH server list The following IPs are not used anymore: 193.19.108.2 and 193.19.108.3. All of the servers are now named consistently under dns.mullvad.net. Several new servers were added. https://mullvad.net/en/help/dns-over-https-and-dns-over-tls/ Updates #5416 Updates #9345 Signed-off-by: James Tucker <james@tailscale.com>	2 years ago
Andrew Dunham	ad4c11aca1	net/netmon: log when the gateway/self IP changes This logs that the gateway/self IP address has changed if one of the new values differs. Updates #8992 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I0919424b68ad97fbe1204dd36317ed6f5915411f	2 years ago
Andrew Dunham	9ee173c256	net/portmapper: fall back to permanent UPnP leases if necessary Some routers don't support lease times for UPnP portmapping; let's fall back to adding a permanent lease in these cases. Additionally, add a proper end-to-end test case for the UPnP portmapping behaviour. Updates #9343 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I17dec600b0595a5bfc9b4d530aff6ee3109a8b12	2 years ago
Brad Fitzpatrick	4e91cf20a8	control/controlknobs, all: add plumbed Knobs type, not global variables Previously two tsnet nodes in the same process couldn't have disjoint sets of controlknob settings from control as both would overwrite each other's global variables. This plumbs a new controlknobs.Knobs type around everywhere and hangs the knobs sent by control on that instead. Updates #9351 Change-Id: I75338646d36813ed971b4ffad6f9a8b41ec91560 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	dc7aa98b76	all: use set.Set consistently instead of map[T]struct{} I didn't clean up the more idiomatic map[T]bool with true values, at least yet. I just converted the relatively awkward struct{}-valued maps. Updates #cleanup Change-Id: I758abebd2bb1f64bc7a9d0f25c32298f4679c14f Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Andrew Dunham	d413dd7ee5	net/dns/publicdns: add support for Wikimedia DNS RELNOTE=Adds support for Wikimedia DNS Updates #9255 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I4213c29e0f91ea5aa0304a5a026c32b6690fead9	2 years ago
Brad Fitzpatrick	1262df0578	net/netmon, net/tsdial: add some link change metrics Updates #9040 Change-Id: I2c87572d79d2118bcf1f0122eccfe712c1bea9d5 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	8b3ea13af0	net/tsdial: be smarter about when to close SystemDial conns It was too aggressive before, as it only had the ill-defined "Major" bool to work with. Now it can check more precisely. Updates #9040 Change-Id: I20967283b64af6a9cad3f8e90cff406de91653b8 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Andrea Barisani	0a74d46568	adjust build tags for tamago Signed-off-by: Andrea Barisani <andrea@inversepath.com>	2 years ago
David Anderson	8b492b4121	net/wsconn: accept a remote addr string and plumb it through This makes wsconn.Conns somewhat present reasonably when they are the client of an http.Request, rather than just put a placeholder in that field. Updates tailscale/corp#13777 Signed-off-by: David Anderson <danderson@tailscale.com>	2 years ago
Brad Fitzpatrick	11ece02f52	net/{interfaces,netmon}: remove "interesting", EqualFiltered API This removes a lot of API from net/interfaces (including all the filter types, EqualFiltered, active Tailscale interface func, etc) and moves the "major" change detection to net/netmon which knows more about the world and the previous/new states. Updates #9040 Change-Id: I7fe66a23039c6347ae5458745b709e7ebdcce245 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Joe Tsai	fcbb2bf348	net/memnet: export the network name (#9111 ) This makes it more maintainable for other code to statically depend on the exact value of this string. It also makes it easier to identify what code might depend on this string by looking up references to this constant. Updates tailscale/corp#13777 Signed-off-by: Joe Tsai <joetsai@digital-static.net>	2 years ago
Andrew Dunham	c86a610eb3	cmd/tailscale, net/portmapper: add --log-http option to "debug portmap" This option allows logging the raw HTTP requests and responses that the portmapper Client makes when using UPnP. This can be extremely helpful when debugging strange UPnP issues with users' devices, and might allow us to avoid having to instruct users to perform a packet capture. Updates #8992 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I2c3cf6930b09717028deaff31738484cc9b008e4	2 years ago
Brad Fitzpatrick	98a5116434	all: adjust some build tags for plan9 I'm not saying it works, but it compiles. Updates #5794 Change-Id: I2f3c99732e67fe57a05edb25b758d083417f083e Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	d58ba59fd5	cmd/tailscale/cli: make netcheck run even if machine lacks TLS certs We have a fancy package for doing TLS cert validation even if the machine doesn't have TLS certs (for LetsEncrypt only) but the CLI's netcheck command wasn't using it. Also, update the tlsdial's outdated package docs while here. Updates #cleanup Change-Id: I74b3cb645d07af4d8ae230fb39a60c809ec129ad Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	e881c1caec	net/netmon: factor out debounce loop, simplify polling impl This simplifies some netmon code in prep for other changes. It breaks up Monitor.debounce into a helper method so locking is easier to read and things unindent, and then it simplifies the polling netmon implementation to remove the redundant stuff that the caller (the Monitor.debounce loop) was already basically doing. Updates #9040 Change-Id: Idcfb45201d00ae64017042a7bdee6ef86ad37a9f Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	9089efea06	net/netmon: make ChangeFunc's signature take new ChangeDelta, not bool Updates #9040 Change-Id: Ia43752064a1a6ecefc8802b58d6eaa0b71cf1f84 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Andrew Dunham	77ff705545	net/portmapper: never select port 0 in UPnP Port 0 is interpreted, per the spec (but inconsistently among router software) as requesting to map every single available port on the UPnP gateway to the internal IP address. We'd previously avoided picking ports below 1024 for one of the two UPnP methods (in #7457), and this change moves that logic so that we avoid it in all cases. Updates #8992 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I20d652c0cd47a24aef27f75c81f78ae53cc3c71e	2 years ago
Brad Fitzpatrick	58a4fd43d8	types/netmap, all: use read-only tailcfg.NodeView in NetworkMap Updates #8948 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	6e57dee7eb	cmd/viewer, types/views, all: un-special case slice of netip.Prefix Make it just a views.Slice[netip.Prefix] instead of its own named type. Having the special case led to circular dependencies in another WIP PR of mine. Updates #8948 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
David Anderson	e92adfe5e4	net/art: allow non-pointers as values Values are still turned into pointers internally to maintain the invariants of strideTable, but from the user's perspective it's now possible to tbl.Insert(pfx, true) rather than tbl.Insert(pfx, ptr.To(true)). Updates #7781 Signed-off-by: David Anderson <danderson@tailscale.com>	2 years ago
Brad Fitzpatrick	e8551d6b40	all: use Go 1.21 slices, maps instead of x/exp/{slices,maps} Updates #8419 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
David Anderson	623d72c83b	net/art: move child table pointers out of strideEntry In preparation for a different refactor, but incidentally also saves 10-25% memory on overall table size in benchmarks. Updates #7781 Signed-off-by: David Anderson <danderson@tailscale.com>	2 years ago
James Tucker	de8e55fda6	net/netcheck,wgengine/magicsock: reduce coupling between netcheck and magicsock Netcheck no longer performs I/O itself, instead it makes requests via SendPacket and expects users to route reply traffic to ReceiveSTUNPacket. Netcheck gains a Standalone function that stands up sockets and goroutines to implement I/O when used in a standalone fashion. Magicsock now unconditionally routes STUN traffic to the netcheck.Client that it hosts, and plumbs the send packet sink. The CLI is updated to make use of the Standalone mode. Fixes #8723 Signed-off-by: James Tucker <james@tailscale.com>	2 years ago
Maisem Ali	98ec8924c2	ipn/ipnlocal,net/tsdial: update docs/rename funcs Updates #cleanup Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 years ago
Will Norris	69f1324c9e	cmd/tailscale: refactor shared utility methods Refactor two shared functions used by the tailscale cli, calcAdvertiseRoutes and licensesURL. These are used by the web client as well as other tailscale subcommands. The web client is being moved out of the cli package, so move these two functions to new locations. Updates tailscale/corp#13775 Signed-off-by: Will Norris <will@tailscale.com>	2 years ago
Brad Fitzpatrick	be4eb6a39e	derp, net/dns/recursive: use Go 1.21 min Updates #8419 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	66e46bf501	ipnlocal, net/*: deprecate interfaces.GetState, use netmon more for it Updates #cleanup Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
David Anderson	52212f4323	all: update exp/slices and fix call sites slices.SortFunc suffered a late-in-cycle API breakage. Updates #cleanup Signed-off-by: David Anderson <danderson@tailscale.com>	2 years ago
David Anderson	6afffece8a	net/art: use more intelligible, go-ish state tracking in table.Get Updates #7781 Signed-off-by: David Anderson <danderson@tailscale.com>	2 years ago
David Anderson	4f14ed2ad6	net/art: use encoding/binary for address bit twiddling Updates #7781 Signed-off-by: David Anderson <danderson@tailscale.com>	2 years ago
David Anderson	f1cd67488d	net/art: move slice closer to its use Updates #7781 Signed-off-by: David Anderson <danderson@tailscale.com>	2 years ago
David Anderson	44ad7b3746	net/art: factor out picking the right strideTable for addr family Updates #7781 Signed-off-by: David Anderson <danderson@tailscale.com>	2 years ago
David Anderson	125b982ba5	net/art: make Table.Get alloc-free Updates #7781 Signed-off-by: David Anderson <danderson@tailscale.com>	2 years ago
David Anderson	b76d8a88ae	net/art: document return value of strideTable.delete Updates #7781 Signed-off-by: David Anderson <danderson@tailscale.com>	2 years ago
David Anderson	b242e2c2cb	net/art: reword confusing function docstring Updates #7781 Signed-off-by: David Anderson <danderson@tailscale.com>	2 years ago
David Anderson	8478358d77	net/art: use "index", not "idx" in function names Updates #7781 Signed-off-by: David Anderson <danderson@tailscale.com>	2 years ago
David Anderson	de5c6ed4be	net/art: document valid values of strideTable.prefix Updates #7781 Signed-off-by: David Anderson <danderson@tailscale.com>	2 years ago
David Anderson	736a44264f	net/art: fix comment typo Updates #7781 Signed-off-by: David Anderson <danderson@tailscale.com>	2 years ago
David Anderson	1e6f0bb608	net/art: fix slowPrefixTable bugs found by fuzzing One is a straight "I forgot how to Go" bug, the others are semantic mismatches with the main implementation around masking the prefixes passed to insert/delete. Updates #7781 Signed-off-by: David Anderson <danderson@tailscale.com>	2 years ago
David Anderson	aaca911904	net/art: add another consistency test for insert/delete Updates #7781 Signed-off-by: David Anderson <danderson@tailscale.com>	2 years ago
David Anderson	b145a22f55	net/art: add more exhaustive table testing Updates #7781 Signed-off-by: David Anderson <danderson@tailscale.com>	2 years ago
David Anderson	9cc3f7a3d6	net/art: fix format of debug output Updates #7781 Signed-off-by: David Anderson <danderson@tailscale.com>	2 years ago
David Anderson	ac657caaf1	net/art: add debug hooks to strideTable Updates #7781 Signed-off-by: David Anderson <danderson@tailscale.com>	2 years ago
David Anderson	fcf4d044fa	net/art: implement path compression optimization Updates #7781 Signed-off-by: David Anderson <danderson@tailscale.com>	2 years ago
David Anderson	486195edf0	net/art: make each strideTable track the IP prefix it represents This is a prerequisite for path compression, so that insert/delete can determine when compression occurred. Updates #7781 Signed-off-by: David Anderson <danderson@tailscale.com>	2 years ago
David Anderson	45b5d0983c	net/art: fix running tests outside of CI Updates #7866 Signed-off-by: David Anderson <danderson@tailscale.com>	2 years ago
Michael Stapelberg	2a6c237d4c	net/dns: overwrite /tmp/resolv.conf on gokrazy Appliances built using https://gokrazy.org/ have a read-only root file system, including /etc/resolv.conf, which is a symlink to /tmp/resolv.conf. The system’s dhcp client overwrites /tmp/resolv.conf instead, so we need to use this path in Tailscale, too. related to https://github.com/gokrazy/gokrazy/issues/209 fixes https://github.com/tailscale/tailscale/issues/8689 Signed-off-by: Michael Stapelberg <michael@stapelberg.de>	2 years ago
Anton Tolchanov	388b124513	net/dns: detect when libnss_resolve is used Having `127.0.0.53` is not the only way to use `systemd-resolved`. An alternative way is to enable `libnss_resolve` module, which seems to now be used by default on Debian 12 bookworm. Fixes #8549 Signed-off-by: Anton Tolchanov <anton@tailscale.com>	2 years ago
Andrew Dunham	9b5e29761c	net/netcheck: ignore PreferredDERP changes that are small If the absolute value of the difference between the current PreferredDERP's latency and the best latency is <= 10ms, don't change it and instead prefer the previous value. This is in addition to the existing hysteresis that tries to remain on the previous DERP region if the relative improvement is small, but handles nodes that have low latency to >1 DERP region better. Updates #8603 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I1e34c94178f8c9a68a69921c5bc0227337514c70	2 years ago
Andrew Dunham	7aba0b0d78	net/netcheck, tailcfg: add DERPHomeParams and use it This allows providing additional information to the client about how to select a home DERP region, such as preferring a given DERP region over all others. Updates #8603 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I7c4a270f31d8585112fab5408799ffba5b75266f	2 years ago
Andrew Dunham	a7648a6723	net/dnsfallback: run recursive resolver and compare results When performing a fallback DNS query, run the recursive resolver in a separate goroutine and compare the results returned by the recursive resolver with the results we get from "regular" bootstrap DNS. This will allow us to gather data about whether the recursive DNS resolver works better, worse, or about the same as "regular" bootstrap DNS. Updates #5853 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: Ifa0b0cc9eeb0dccd6f7a3d91675fe44b3b34bd48	2 years ago
Adrian Dewhurst	cd4c71c122	tstest: prepare for Clock API changes This change introduces tstime.NewClock and tstime.ClockOpts as a new way to construct tstime.Clock. This is a subset of #8464 as a stepping stone so that we can update our internal code to use the new API before making the second round of changes. Updates #8463 Change-Id: Ib26edb60e5355802aeca83ed60e4fdf806c90e27 Signed-off-by: Adrian Dewhurst <adrian@tailscale.com>	2 years ago
Andrew Dunham	d9eca20ee2	net/tcpinfo: add package to allow fetching TCP information This package contains platform-independent abstractions for fetching information about an open TCP connection. Updates #8413 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I236657b1060d7e6a45efc7a2f6aacf474547a2fe	2 years ago
KevinLiang10	243ce6ccc1	util/linuxfw: decoupling IPTables logic from linux router This change is introducing new netfilterRunner interface and moving iptables manipulation to a lower leveled iptables runner. For #391 Signed-off-by: KevinLiang10 <kevinliang@tailscale.com>	2 years ago
Ross Zurowski	832f1028c7	net/netutil: parse IP forwarding val as int, not bool (#8455 ) This commit updates our IP forwarding parsing logic to allow the less common but still valid value of `2` to be parsed as `true`, which fixes an error some users encountered. Fixes #8375 Signed-off-by: Ross Zurowski <ross@rosszurowski.com>	2 years ago
Brad Fitzpatrick	a874f1afd8	all: adjust case of "IPv4" and "IPv6" Updates #docs Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Andrew Dunham	b6d20e6f8f	go.mod, net/dns/recursive: update github.com/miekg/dns Updates #cleanup Change-Id: If4de6a84448a17dd81cc2a8af788bd18c3d0bbe3 Signed-off-by: Andrew Dunham <andrew@du.nham.ca>	2 years ago
Brad Fitzpatrick	a076213f58	net/memnet: add optional Listener.NewConn config knob Updates tailscale/corp#11620 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	1543e233e6	net/tstun, tsnet: make happier on WASI Also fix a js/wasm issue with tsnet in the process. (same issue as WASI) Updates #8320 Fixes #8315 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Andrew Dunham	f077b672e4	net/dns/recursive: add initial implementation of recursive DNS resolver We've talked in the past about reworking how bootstrap DNS works to instead do recursive DNS resolution from the root; this would better support on-prem customers and Headscale users where the DERP servers don't currently resolve their DNS server. This package is an initial implementation of recursive resolution for A and AAAA records. Updates #5853 Change-Id: Ibe974d78709b4b03674b47c4ef61f9a00addf8b4 Signed-off-by: Andrew Dunham <andrew@du.nham.ca>	3 years ago
Brad Fitzpatrick	eefee6f149	all: use cmpx.Or where it made sense I left a few out where writing it explicitly was better for various reasons. Updates #8296 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Denton Gentry	64f16f7f38	net/dnscache: use PreferGo on Windows. Updates https://github.com/tailscale/tailscale/issues/5161 Signed-off-by: Denton Gentry <dgentry@tailscale.com>	3 years ago
James Tucker	da90fab899	net/netcheck: reenable TestBasic on Windows This test was either fixed by intermediate changes or was mis-flagged as failing during #7876 triage. Updates #7876 Signed-off-by: James Tucker <jftucker@gmail.com>	3 years ago
Will Norris	ea84fc9ad2	net/sockstats: wait before reporting battery usage Wait 2 minutes before we start reporting battery usage. There is always radio activity on initial startup, which gets reported as 100% high power usage. Let that settle before we report usage data. Updates tailscale/corp#9230 Signed-off-by: Will Norris <will@tailscale.com>	3 years ago
James Tucker	9ed3a061c3	net/netns: fix segv when no tailscale interface is found `interfaces.Tailscale()` returns all zero values when it finds no Tailscale interface and encounters no errors. The netns package was treating no error as a signal that it would receive a non-zero pointer value leading to nil pointer dereference. Observed in: ``` --- FAIL: TestGetInterfaceIndex (0.00s) --- FAIL: TestGetInterfaceIndex/IP_and_port (0.00s) panic: runtime error: invalid memory address or nil pointer dereference [recovered] panic: runtime error: invalid memory address or nil pointer dereference [signal SIGSEGV: segmentation violation code=0x2 addr=0x0 pc=0x1029eb7d8] goroutine 7 [running]: testing.tRunner.func1.2({0x102a691e0, 0x102bc05c0}) /Users/raggi/.cache/tailscale-go/src/testing/testing.go:1526 +0x1c8 testing.tRunner.func1() /Users/raggi/.cache/tailscale-go/src/testing/testing.go:1529 +0x384 panic({0x102a691e0, 0x102bc05c0}) /Users/raggi/.cache/tailscale-go/src/runtime/panic.go:884 +0x204 tailscale.com/net/netns.getInterfaceIndex(0x14000073f28, 0x1028d0284?, {0x1029ef3b7, 0xa}) /Users/raggi/src/github.com/tailscale/tailscale/net/netns/netns_darwin.go:114 +0x228 tailscale.com/net/netns.TestGetInterfaceIndex.func2(0x14000138000) /Users/raggi/src/github.com/tailscale/tailscale/net/netns/netns_darwin_test.go:37 +0x54 testing.tRunner(0x14000138000, 0x140000551b0) /Users/raggi/.cache/tailscale-go/src/testing/testing.go:1576 +0x10c created by testing.(*T).Run /Users/raggi/.cache/tailscale-go/src/testing/testing.go:1629 +0x368 FAIL tailscale.com/net/netns 0.824s ``` Fixes #8064 Signed-off-by: James Tucker <jftucker@gmail.com>	3 years ago
Brad Fitzpatrick	6e967446e4	tsd: add package with System type to unify subsystem init, discovery This is part of an effort to clean up tailscaled initialization between tailscaled, tailscaled Windows service, tsnet, and the mac GUI. Updates #8036 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Maisem Ali	3ae7140690	net/tstun: handle exit nodes in NAT configs In the case where the exit node requires SNAT, we would SNAT all traffic not just the traffic meant to go through the exit node. This was a result of the default route being added to the routing table which would match basically everything. In this case, we need to account for all peers in the routing table not just the ones that require NAT. Fix and add a test. Updates tailscale/corp#8020 Signed-off-by: Maisem Ali <maisem@tailscale.com>	3 years ago
Charlotte Brandhorst-Satzkorn	161d1d281a	net/ping,netcheck: add v6 pinging capabilities to pinger (#7971 ) This change adds a v6conn to the pinger to enable sending pings to v6 addrs. Updates #7826 Signed-off-by: Charlotte Brandhorst-Satzkorn <charlotte@tailscale.com>	3 years ago
Maisem Ali	f58751eb2b	net/packet: add NAT support for DCCP and GRE Updates tailscale/corp#8020 Signed-off-by: Maisem Ali <maisem@tailscale.com>	3 years ago
Brad Fitzpatrick	90ba26cea1	net/netcheck: fix crash when IPv6 kinda but not really works Looks like on some systems there's an IPv6 address, but then opening a IPv6 UDP socket fails later. Probably some firewall. Tolerate it better and don't crash. To repro: check the "udp6" to something like "udp7" (something that'll fail) and run "go run ./cmd/tailscale netcheck" on a machine with active IPv6. It used to crash and now it doesn't. Fixes #7949 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Andrew Dunham	04a3118d45	net/tstun: add tests for captureHook Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I630f852d9f16c951c721b34f2bc4128e68fe9475	3 years ago
Mihai Parparita	7330aa593e	all: avoid repeated default interface lookups On some platforms (notably macOS and iOS) we look up the default interface to bind outgoing connections to. This is both duplicated work and results in logspam when the default interface is not available (i.e. when a phone has no connectivity, we log an error and thus cause more things that we will try to upload and fail). Fixed by passing around a netmon.Monitor to more places, so that we can use its cached interface state. Fixes #7850 Updates #7621 Signed-off-by: Mihai Parparita <mihai@tailscale.com>	3 years ago
Mihai Parparita	4722f7e322	all: move network monitoring from wgengine/monitor to net/netmon We're using it in more and more places, and it's not really specific to our use of Wireguard (and does more just link/interface monitoring). Also removes the separate interface we had for it in sockstats -- it's a small enough package (we already pull in all of its dependencies via other paths) that it's not worth the extra complexity. Updates #7621 Updates #7850 Signed-off-by: Mihai Parparita <mihai@tailscale.com>	3 years ago
Andrew Dunham	f85dc6f97c	ci: add more lints (#7909 ) This is a follow-up to #7905 that adds two more linters and fixes the corresponding findings. As per the previous PR, this only flags things that are "obviously" wrong, and fixes the issues found. Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I8739bdb7bc4f75666a7385a7a26d56ec13741b7c	3 years ago
Maisem Ali	85de580455	net/tsdial: do not use proxies when dialing out to PeerAPI Found this when adding a test that does a ping over PeerAPI. Our integration tests set up a trafficTrap to ensure that tailscaled does not call out to the internet, and it does so via a HTTP_PROXY. When adding a test for pings over PeerAPI, it triggered the trap and investigation lead to the realization that we were not removing the Proxy when trying to dial out to the PeerAPI. Updates tailscale/corp#8020 Signed-off-by: Maisem Ali <maisem@tailscale.com>	3 years ago
Mihai Parparita	d0906cda97	net/sockstats: expose debug info Exposes some internal state of the sockstats package via the C2N and PeerAPI endpoints, so that it can be used for debugging. For now this includes the estimated radio on percentage and a second-by-second view of the times the radio was active. Also fixes another off-by-one error in the radio on percentage that was leading to >100% values (if n seconds have passed since we started to monitor, there may be n + 1 possible seconds where the radio could have been on). Updates tailscale/corp#9230 Signed-off-by: Mihai Parparita <mihai@tailscale.com>	3 years ago
Will Norris	7c386ca6d2	net/sockstats: fix calculation of radio power usage When splitting the radio monitor usage array, we were splitting at now % 3600 to get values into chronological order. This caused the value for the final second to be included at the beginning of the ordered slice rather than the end. If there was activity during that final second, an extra five seconds of high power usage would get recorded in some cases. This could result in a final calculation of greater than 100% usage. This corrects that by splitting values at (now+1 % 3600). This also simplifies the percentage calculation by always rounding values down, which is sufficient for our usage. Signed-off-by: Will Norris <will@tailscale.com>	3 years ago
Mihai Parparita	c7cea825ae	net/netns: don't log errors when we can't get the default route on Darwin It's somewhat common (e.g. when a phone has no reception), and leads to lots of logspam. Updates #7850 Signed-off-by: Mihai Parparita <mihai@tailscale.com>	3 years ago
Andrew Dunham	280255acae	various: add golangci-lint, fix issues (#7905 ) This adds an initial and intentionally minimal configuration for golang-ci, fixes the issues reported, and adds a GitHub Action to check new pull requests against this linter configuration. Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I8f38fbc315836a19a094d0d3e986758b9313f163	3 years ago
Joe Tsai	ff1b35ec6c	net/connstats: exclude traffic with internal Tailscale service (#7904 ) Exclude traffic with 100.100.100.100 (for IPv4) and with fd7a:115c:a1e0::53 (for IPv6) since this traffic with the Tailscale service running locally on the node. This traffic never left the node. It also happens to be a high volume amount of traffic since DNS requests occur over UDP with each request coming from a unique port, thus resulting in many discrete traffic flows. Fixes tailscale/corp#10554 Signed-off-by: Joe Tsai <joetsai@digital-static.net>	3 years ago
Mihai Parparita	9a655a1d58	net/dnsfallback: more explicitly pass through logf function Redoes the approach from #5550 and #7539 to explicitly pass in the logf function, instead of having global state that can be overridden. Signed-off-by: Mihai Parparita <mihai@tailscale.com>	3 years ago
Brad Fitzpatrick	162488a775	net/interfaces: cache "home" router lookup on big Linux routers This is a continuation of the earlier `2a67beaacf` but more aggressive; this now remembers that we failed to find the "home" router IP so we don't try again later on the next call. Updates #7621 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
James Tucker	c5150eae67	net/netcheck: reenable TestNodeAddrResolve on Windows Updates #7876 Co-authored-by: Andrew Dunham <andrew@du.nham.ca> Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Signed-off-by: James Tucker <james@tailscale.com> Change-Id: Idb2e6cc2edf6ca123b751d6c8f8729b0cba86023	3 years ago
Brad Fitzpatrick	10f1c90f4d	wgengine/magicsock, types/nettype, etc: finish ReadFromUDPAddrPort netip migration So we're staying within the netip.Addr/AddrPort consistently and avoiding allocs/conversions to the legacy net addr types. Updates #5162 Change-Id: I59feba60d3de39f773e68292d759766bac98c917 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	29f7df9d8f	wgengine/magicsock, etc: remove mostly unused WriteTo methods Updates #2331 Updates #5162 Change-Id: I8291884425481eeaedde38a54adfd8ed7292a497 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	83c41f3697	net/netcheck: remove unused method from interface Updates #2331 Updates #5162 Change-Id: I77ff956c2d59bde611d47523659a07afb4a6da2d Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
James Tucker	8dec1a8724	.github/workflows: reenable Windows CI, disable broken tests We accidentally switched to ./tool/go in `4022796484` which resulted in no longer running Windows builds, as this is attempting to run a bash script. I was unable to quickly fix the various tests that have regressed, so instead I've added skips referencing #7876, which we need to back and fix. Updates #7262 Updates #7876 Signed-off-by: James Tucker <james@tailscale.com>	3 years ago
Brad Fitzpatrick	c889254b42	net/art: skip tests on CI for now To get the tree green again for other people. Updates #7866 Change-Id: Ibdad2e1408e5f0c97e49a148bfd77aad17c2c5e5 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Andrew Dunham	228d0c6aea	net/netcheck: use dnscache.Resolver when resolving DERP IPs This also adds a bunch of tests for this function to ensure that we're returning the proper IP(s) in all cases. Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I0d9d57170dbab5f2bf07abdf78ecd17e0e635399	3 years ago
Maisem Ali	64bbf1738e	tailcfg: make SelfNodeV4MasqAddrForThisPeer a pointer This makes `omitempty` actually work, and saves bytes in each map response. Updates tailscale/corp#8020 Signed-off-by: Maisem Ali <maisem@tailscale.com>	3 years ago
David Anderson	a5fd51ebdc	net/art: disable the IPv6 100k routes benchmark. At the current unoptimized memory utilization of the various data structures, 100k IPv6 routes consumes in the ballpark of 3-4GiB, which risks OOMing our 386 test machine. Until we have the optimizations to (drastically) reduce that consumption, skip the test that bloats too much for 32-bit machines. Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Anderson	a7c910e361	net/art: implement the Table type, a multi-level art route table. Updates #7781 │ sec/op │ TableInsertion/ipv4/10 1.562µ ± 2% TableInsertion/ipv4/100 2.398µ ± 5% TableInsertion/ipv4/1000 2.097µ ± 3% TableInsertion/ipv4/10000 2.756µ ± 4% TableInsertion/ipv4/100000 2.473µ ± 13% TableInsertion/ipv6/10 7.649µ ± 2% TableInsertion/ipv6/100 12.09µ ± 3% TableInsertion/ipv6/1000 14.84µ ± 5% TableInsertion/ipv6/10000 14.72µ ± 8% TableInsertion/ipv6/100000 13.23µ ± 41% TableDelete/ipv4/10 378.4n ± 5% TableDelete/ipv4/100 366.9n ± 3% TableDelete/ipv4/1000 418.6n ± 3% TableDelete/ipv4/10000 609.2n ± 11% TableDelete/ipv4/100000 679.2n ± 28% TableDelete/ipv6/10 504.2n ± 4% TableDelete/ipv6/100 959.5n ± 12% TableDelete/ipv6/1000 1.436µ ± 6% TableDelete/ipv6/10000 1.772µ ± 15% TableDelete/ipv6/100000 1.172µ ± 113% TableGet/ipv4/10 32.14n ± 11% TableGet/ipv4/100 38.58n ± 2% TableGet/ipv4/1000 45.03n ± 2% TableGet/ipv4/10000 52.90n ± 7% TableGet/ipv4/100000 135.2n ± 11% TableGet/ipv6/10 41.55n ± 1% TableGet/ipv6/100 44.78n ± 2% TableGet/ipv6/1000 49.03n ± 2% TableGet/ipv6/10000 65.38n ± 5% TableGet/ipv6/100000 525.0n ± 39% │ avg-B/op │ TableInsertion/ipv4/10 25.18Ki ± 0% TableInsertion/ipv4/100 17.63Ki ± 0% TableInsertion/ipv4/1000 14.14Ki ± 0% TableInsertion/ipv4/10000 12.92Ki ± 0% TableInsertion/ipv4/100000 11.13Ki ± 0% TableInsertion/ipv6/10 76.87Ki ± 0% TableInsertion/ipv6/100 98.33Ki ± 0% TableInsertion/ipv6/1000 91.44Ki ± 0% TableInsertion/ipv6/10000 90.39Ki ± 0% TableInsertion/ipv6/100000 87.19Ki ± 0% TableDelete/ipv4/10 3.230 ± 0% TableDelete/ipv4/100 4.020 ± 0% TableDelete/ipv4/1000 3.990 ± 0% TableDelete/ipv4/10000 4.000 ± 0% TableDelete/ipv4/100000 4.000 ± 0% TableDelete/ipv6/10 16.00 ± 0% TableDelete/ipv6/100 16.00 ± 0% TableDelete/ipv6/1000 16.00 ± 0% TableDelete/ipv6/10000 16.00 ± 0% TableDelete/ipv6/100000 16.00 ± 0% │ avg-allocs/op │ TableInsertion/ipv4/10 2.900 ± 0% TableInsertion/ipv4/100 2.330 ± 0% TableInsertion/ipv4/1000 2.070 ± 0% TableInsertion/ipv4/10000 1.980 ± 0% TableInsertion/ipv4/100000 1.840 ± 0% TableInsertion/ipv6/10 6.800 ± 0% TableInsertion/ipv6/100 8.420 ± 0% TableInsertion/ipv6/1000 7.900 ± 0% TableInsertion/ipv6/10000 7.820 ± 0% TableInsertion/ipv6/100000 7.580 ± 0% TableDelete/ipv4/10 1.000 ± 0% TableDelete/ipv4/100 1.000 ± 0% TableDelete/ipv4/1000 1.000 ± 0% TableDelete/ipv4/10000 1.000 ± 0% TableDelete/ipv4/100000 1.000 ± 0% TableDelete/ipv6/10 1.000 ± 0% TableDelete/ipv6/100 1.000 ± 0% TableDelete/ipv6/1000 1.000 ± 0% TableDelete/ipv6/10000 1.000 ± 0% TableDelete/ipv6/100000 1.000 ± 0% │ routes/s │ TableInsertion/ipv4/10 640.3k ± 2% TableInsertion/ipv4/100 417.1k ± 5% TableInsertion/ipv4/1000 477.0k ± 3% TableInsertion/ipv4/10000 362.8k ± 5% TableInsertion/ipv4/100000 404.5k ± 15% TableInsertion/ipv6/10 130.7k ± 1% TableInsertion/ipv6/100 82.69k ± 3% TableInsertion/ipv6/1000 67.37k ± 5% TableInsertion/ipv6/10000 67.93k ± 9% TableInsertion/ipv6/100000 75.63k ± 29% TableDelete/ipv4/10 2.642M ± 6% TableDelete/ipv4/100 2.726M ± 3% TableDelete/ipv4/1000 2.389M ± 3% TableDelete/ipv4/10000 1.641M ± 12% TableDelete/ipv4/100000 1.472M ± 27% TableDelete/ipv6/10 1.984M ± 4% TableDelete/ipv6/100 1.042M ± 11% TableDelete/ipv6/1000 696.5k ± 6% TableDelete/ipv6/10000 564.4k ± 13% TableDelete/ipv6/100000 853.6k ± 53% │ addrs/s │ TableGet/ipv4/10 31.11M ± 10% TableGet/ipv4/100 25.92M ± 2% TableGet/ipv4/1000 22.21M ± 2% TableGet/ipv4/10000 18.91M ± 8% TableGet/ipv4/100000 7.397M ± 12% TableGet/ipv6/10 24.07M ± 1% TableGet/ipv6/100 22.33M ± 2% TableGet/ipv6/1000 20.40M ± 2% TableGet/ipv6/10000 15.30M ± 5% TableGet/ipv6/100000 1.905M ± 28% │ B/op │ TableGet/ipv4/10 4.000 ± 0% TableGet/ipv4/100 4.000 ± 0% TableGet/ipv4/1000 4.000 ± 0% TableGet/ipv4/10000 4.000 ± 0% TableGet/ipv4/100000 4.000 ± 0% TableGet/ipv6/10 16.00 ± 0% TableGet/ipv6/100 16.00 ± 0% TableGet/ipv6/1000 16.00 ± 0% TableGet/ipv6/10000 16.00 ± 0% TableGet/ipv6/100000 16.00 ± 0% │ allocs/op │ TableGet/ipv4/10 1.000 ± 0% TableGet/ipv4/100 1.000 ± 0% TableGet/ipv4/1000 1.000 ± 0% TableGet/ipv4/10000 1.000 ± 0% TableGet/ipv4/100000 1.000 ± 0% TableGet/ipv6/10 1.000 ± 0% TableGet/ipv6/100 1.000 ± 0% TableGet/ipv6/1000 1.000 ± 0% TableGet/ipv6/10000 1.000 ± 0% TableGet/ipv6/100000 1.000 ± 0% Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
Mihai Parparita	edb02b63f8	net/sockstats: pass in logger to sockstats.WithSockStats Using log.Printf may end up being printed out to the console, which is not desirable. I noticed this when I was investigating some client logs with `sockstats: trace "NetcheckClient" was overwritten by another`. That turns to be harmless/expected (the netcheck client will fall back to the DERP client in some cases, which does its own sockstats trace). However, the log output could be visible to users if running the `tailscale netcheck` CLI command, which would be needlessly confusing. Updates tailscale/corp#9230 Signed-off-by: Mihai Parparita <mihai@tailscale.com>	3 years ago
Mihai Parparita	782ccb5655	.github/workflows: run one set of tests with the tailscale_go build tag We use it to gate code that depends on custom Go toolchain, but it's currently only passed in the corp runners. Add a set on OSS so that we can catch regressions earlier. To specifically test sockstats this required adding a build tag to explicitly enable them -- they're normally on for iOS, macOS and Android only, and we don't run tests on those platforms normally. Signed-off-by: Mihai Parparita <mihai@tailscale.com>	3 years ago
Mihai Parparita	e978299bf0	net/sockstats: disable deltas for the cell radio power state metric Updates tailscale/corp#9230 Signed-off-by: Mihai Parparita <mihai@tailscale.com>	3 years ago
Will Norris	22680a11ae	net/sockstats: return early if no radio period length Signed-off-by: Will Norris <will@tailscale.com>	3 years ago
Will Norris	75784e10e2	sockstats: add client metrics for radio power state power state is very roughly approximated based on observed network activity and AT&T's state transition timings for a typical 3G radio. Updates tailscale/corp#9230 Updates #3363 Signed-off-by: Will Norris <will@tailscale.com>	3 years ago
Tom DNetto	6a627e5a33	net, wgengine/capture: encode NAT addresses in pcap stream Signed-off-by: Tom DNetto <tom@tailscale.com>	3 years ago
Jordan Whited	f475e5550c	net/neterror, wgengine/magicsock: use UDP GSO and GRO on Linux (#7791 ) This commit implements UDP offloading for Linux. GSO size is passed to and from the kernel via socket control messages. Support is probed at runtime. UDP GSO is dependent on checksum offload support on the egress netdev. UDP GSO will be disabled in the event sendmmsg() returns EIO, which is a strong signal that the egress netdev does not support checksum offload. Updates tailscale/corp#8734 Signed-off-by: Jordan Whited <jordan@tailscale.com>	3 years ago
David Anderson	4d1b3bc26f	net/art: implement the stride table building block of ART A stride table is an 8-bit routing table implemented as an array binary tree, with a special tree updating function (allot) that enables lightning fast address lookups and reasonably fast insertion and deletion. Insertion, deletion and lookup are all allocation-free. Updates #7781 │ sec/op │ StrideTableInsertion/10/random_order 16.79n ± 2% StrideTableInsertion/10/largest_first 16.83n ± 1% StrideTableInsertion/10/smallest_first 16.83n ± 0% StrideTableInsertion/50/random_order 17.84n ± 1% StrideTableInsertion/50/largest_first 20.04n ± 1% StrideTableInsertion/50/smallest_first 16.39n ± 0% StrideTableInsertion/100/random_order 14.63n ± 0% StrideTableInsertion/100/largest_first 17.45n ± 4% StrideTableInsertion/100/smallest_first 12.98n ± 0% StrideTableInsertion/200/random_order 12.51n ± 4% StrideTableInsertion/200/largest_first 18.36n ± 3% StrideTableInsertion/200/smallest_first 9.609n ± 3% StrideTableDeletion/10/random_order 19.50n ± 1% StrideTableDeletion/10/largest_first 19.34n ± 0% StrideTableDeletion/10/smallest_first 19.43n ± 0% StrideTableDeletion/50/random_order 14.58n ± 1% StrideTableDeletion/50/largest_first 14.27n ± 2% StrideTableDeletion/50/smallest_first 15.51n ± 0% StrideTableDeletion/100/random_order 12.02n ± 3% StrideTableDeletion/100/largest_first 10.64n ± 0% StrideTableDeletion/100/smallest_first 13.21n ± 3% StrideTableDeletion/200/random_order 14.05n ± 4% StrideTableDeletion/200/largest_first 9.288n ± 5% StrideTableDeletion/200/smallest_first 18.51n ± 1% StrideTableGet 0.5010n ± 0% │ routes/s │ StrideTableInsertion/10/random_order 59.55M ± 2% StrideTableInsertion/10/largest_first 59.42M ± 1% StrideTableInsertion/10/smallest_first 59.43M ± 0% StrideTableInsertion/50/random_order 56.04M ± 1% StrideTableInsertion/50/largest_first 49.91M ± 1% StrideTableInsertion/50/smallest_first 61.00M ± 0% StrideTableInsertion/100/random_order 68.35M ± 0% StrideTableInsertion/100/largest_first 57.32M ± 3% StrideTableInsertion/100/smallest_first 77.06M ± 0% StrideTableInsertion/200/random_order 79.93M ± 4% StrideTableInsertion/200/largest_first 54.47M ± 3% StrideTableInsertion/200/smallest_first 104.1M ± 3% StrideTableDeletion/10/random_order 51.28M ± 1% StrideTableDeletion/10/largest_first 51.70M ± 0% StrideTableDeletion/10/smallest_first 51.48M ± 0% StrideTableDeletion/50/random_order 68.60M ± 1% StrideTableDeletion/50/largest_first 70.09M ± 2% StrideTableDeletion/50/smallest_first 64.45M ± 0% StrideTableDeletion/100/random_order 83.21M ± 3% StrideTableDeletion/100/largest_first 94.03M ± 0% StrideTableDeletion/100/smallest_first 75.69M ± 3% StrideTableDeletion/200/random_order 71.20M ± 5% StrideTableDeletion/200/largest_first 107.7M ± 5% StrideTableDeletion/200/smallest_first 54.02M ± 1% StrideTableGet 1.996G ± 0% Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
James Tucker	40fa2a420c	envknob,net/tstun,wgengine: use TS_DEBUG_MTU consistently Noted on #5915 TS_DEBUG_MTU was not used consistently everywhere. Extract the default into a function that can apply this centrally and use it everywhere. Added envknob.Lookup{Int,Uint}Sized to make it easier to keep CodeQL happy when using converted values. Updates #5915 Signed-off-by: James Tucker <james@tailscale.com>	3 years ago
Will Norris	e99c7c3ee5	sockstats: add labels for netlog and sockstatlog packages Signed-off-by: Will Norris <will@tailscale.com>	3 years ago
Andrew Dunham	38e4d303a2	net/tshttpproxy: don't proxy through ourselves When running a SOCKS or HTTP proxy, configure the tshttpproxy package to drop those addresses from any HTTP_PROXY or HTTPS_PROXY environment variables. Fixes #7407 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I6cd7cad7a609c639780484bad521c7514841764b	3 years ago
Maisem Ali	985535aebc	net/tstun,wgengine/*: add support for NAT to routes This adds support to make exit nodes and subnet routers work when in scenarios where NAT is required. It also updates the NATConfig to be generated from a `wgcfg.Config` as that handles merging prefs with the netmap, so it has the required information about whether an exit node is already configured and whether routes are accepted. Updates tailscale/corp#8020 Signed-off-by: Maisem Ali <maisem@tailscale.com>	3 years ago
Maisem Ali	d1d5d52b2c	net/tstun/table: add initial RoutingTable implementation It is based on `*tempfork/device.AllowedIPs`. Updates tailscale/corp#8020 Signed-off-by: Maisem Ali <maisem@tailscale.com>	3 years ago
Jordan Whited	27e37cf9b3	go.mod, net/tstun, wgengine/magicsock: update wireguard-go (#7712 ) This commit updates the wireguard-go dependency to pull in fixes for the tun package, specifically 052af4a and aad7fca. Signed-off-by: Jordan Whited <jordan@tailscale.com>	3 years ago
Maisem Ali	d2fd101eb4	net/tstun: only log natConfig on changes Updates tailscale/corp#8020 Signed-off-by: Maisem Ali <maisem@tailscale.com>	3 years ago
Andrew Dunham	33b359642e	net/dns: don't send on closed channel in resolvedManager Fixes #7686 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: Ibffb05539ab876b12407d77dcf2201d467895981	3 years ago
Andrew Dunham	4cb1bfee44	net/netcheck: improve determinism in hairpinning test If multiple Go channels have a value (or are closed), receiving from them all in a select will nondeterministically return one of the two arms. In this case, it's possible that the hairpin check timer will have expired between when we start checking and before we check at all, but the hairpin packet has already been received. In such cases, we'd nondeterministically set report.HairPinning. Instead, check if we have a value in our results channel first, then select on the value and timeout channel after. Also, add a test that catches this particular failure. Fixes #1795 Change-Id: I842ab0bd38d66fabc6cabf2c2c1bb9bd32febf35 Signed-off-by: Andrew Dunham <andrew@du.nham.ca>	3 years ago
Maisem Ali	0e203e414f	net/packet: add checksum update tests Updates tailscale/corp#8020 Signed-off-by: Maisem Ali <maisem@tailscale.com>	3 years ago
Maisem Ali	0bf8c8e710	net/tstun: use p.Buffer() in more places Updates tailscale/corp#8020 Signed-off-by: Maisem Ali <maisem@tailscale.com>	3 years ago
Maisem Ali	bb31fd7d1c	net/tstun: add inital support for NAT v4 This adds support in tstun to utitilize the SelfNodeV4MasqAddrForThisPeer and perform the necessary modifications to the packet as it passes through tstun. Currently this only handles ICMP, UDP and TCP traffic. Subnet routers and Exit Nodes are also unsupported. Updates tailscale/corp#8020 Co-authored-by: Melanie Warrick <warrick@tailscale.com> Signed-off-by: Maisem Ali <maisem@tailscale.com>	3 years ago
Maisem Ali	535fad16f8	net/tstun: rename filterIn/filterOut methods to be more descriptive Updates tailscale/corp#8020 Signed-off-by: Maisem Ali <maisem@tailscale.com>	3 years ago
Mihai Parparita	d2dec13392	net/sockstats: export cellular-only clientmetrics Followup to #7518 to also export client metrics when the active interface is cellular. Updates tailscale/corp#9230 Updates #3363 Signed-off-by: Mihai Parparita <mihai@tailscale.com>	3 years ago
Denton Gentry	ebc630c6c0	net/interfaces: also allow link-local for AzureAppServices. In May 2021, Azure App Services used 172.16.x.x addresses: ``` 10: eth0@if11: <BROADCAST,MULTICAST,UP,LOWER_UP,M-DOWN> mtu 1500 qdisc noqueue state UP link/ether 02:42:ac:10:01:03 brd ff:ff:ff:ff:ff:ff inet 172.16.1.3/24 brd 172.16.1.255 scope global eth0 valid_lft forever preferred_lft forever ``` Now it uses link-local: ``` 2: eth0@if6: <BROADCAST,MULTICAST,UP,LOWER_UP,M-DOWN> mtu 1500 qdisc noqueue state UP link/ether 8a:30:1f:50:1d:23 brd ff:ff:ff:ff:ff:ff inet 169.254.129.3/24 brd 169.254.129.255 scope global eth0 valid_lft forever preferred_lft forever ``` This is reasonable for them to choose to do, it just broke the handling in net/interfaces. This PR proposes to: 1. Always allow link-local in LocalAddresses() if we have no better address available. 2. Continue to make isUsableV4() conditional on an environment we know requires it. I don't love the idea of having to discover these environments one by one, but I don't understand the consequences of making isUsableV4() return true unconditionally. It makes isUsableV4() essentially always return true and perform no function. Fixes https://github.com/tailscale/tailscale/issues/7603 Signed-off-by: Denton Gentry <dgentry@tailscale.com>	3 years ago
Mihai Parparita	97b6d3e917	sockstats: remove per-interface stats from Get They're not needed for the sockstats logger, and they're somewhat expensive to return (since they involve the creation of a map per label). We now have a separate GetInterfaces() method that returns them instead (which we can still use in the PeerAPI debug endpoint). If changing sockstatlog to sample at 10,000 Hz (instead of the default of 10Hz), the CPU usage would go up to 59% on a iPhone XS. Removing the per-interface stats drops it to 20% (a no-op implementation of Get that returns a fixed value is 16%). Updates tailscale/corp#9230 Updates #3363 Signed-off-by: Mihai Parparita <mihai@tailscale.com>	3 years ago
Will Norris	a1d9f65354	ipn,log: add logger for sockstat deltas Signed-off-by: Will Norris <will@tailscale.com> Co-authored-by: Melanie Warrick <warrick@tailscale.com>	3 years ago
Maisem Ali	5e8a80b845	all: replace /kb/ links with /s/ equivalents Signed-off-by: Maisem Ali <maisem@tailscale.com>	3 years ago
Andrew Dunham	83fa17d26c	various: pass logger.Logf through to more places Updates #7537 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: Id89acab70ea678c8c7ff0f44792d54c7223337c6	3 years ago
Mihai Parparita	b64d78d58f	sockstats: refactor validation to be opt-in Followup to #7499 to make validation a separate function ( GetWithValidation vs. Get). This way callers that don't need it don't pay the cost of a syscall per active TCP socket. Also clears the conn on close, so that we don't double-count the stats. Also more consistently uses Go doc comments for the exported API of the sockstats package. Updates tailscale/corp#9230 Updates #3363 Signed-off-by: Mihai Parparita <mihai@tailscale.com>	3 years ago
Mihai Parparita	ea81bffdeb	sockstats: export as client metrics Though not fine-grained enough to be useful for detailed analysis, we might as well export that we gather as client metrics too, since we have an upload/analysis pipeline for them. clientmetric.Metric.Add is an atomic add, so it's pretty cheap to also do per-packet. Updates tailscale/corp#9230 Updates #3363 Signed-off-by: Mihai Parparita <mihai@tailscale.com>	3 years ago
Mihai Parparita	4c2f67a1d0	net/sockstat: fix per-interface statistics not always being available withSockStats may be called before setLinkMonitor, in which case we don't have a populated knownInterfaces map. Since we pre-populate the per-interface counters at creation time, we would end up with an empty map. To mitigate this, we do an on-demand request for the list of interfaces. This would most often happen with the logtail instrumentation, since we initialize it very early on. Updates tailscale/corp#9230 Signed-off-by: Mihai Parparita <mihai@tailscale.com>	3 years ago
Mihai Parparita	f4f8ed98d9	sockstats: add validation for TCP socket stats We can use the TCP_CONNECTION_INFO getsockopt() on Darwin to get OS-collected tx/rx bytes for TCP sockets. Since this API is not available for UDP sockets (or on Linux/Android), we can't rely on it for actual stats gathering. However, we can use it to validate the stats that we collect ourselves using read/write hooks, so that we can be more confident in them. We do need additional hooks from the Go standard library (added in tailscale/go#59) to be able to collect them. Updates tailscale/corp#9230 Updates #3363 Signed-off-by: Mihai Parparita <mihai@tailscale.com>	3 years ago
Mihai Parparita	6ac6ddbb47	sockstats: switch label to enum Makes it cheaper/simpler to persist values, and encourages reuse of labels as opposed to generating an arbitrary number. Updates tailscale/corp#9230 Updates #3363 Signed-off-by: Mihai Parparita <mihai@tailscale.com>	3 years ago
Aaron Klotz	9687f3700d	net/dns: deal with Windows wsl.exe hangs Despite the fact that WSL configuration is still disabled by default, we continue to log the machine's list of WSL distros as a diagnostic measure. Unfortunately I have seen the "wsl.exe -l" command hang indefinitely. This patch adds a (more than reasonable) 10s timeout to ensure that tailscaled does not get stuck while executing this operation. I also modified the Windows implementation of NewOSConfigurator to do the logging asynchronously, since that information is not required in order to continue starting up. Fixes #7476 Signed-off-by: Aaron Klotz <aaron@tailscale.com>	3 years ago
David Crawshaw	96a555fc5a	net/socks5: add password auth support Conforms to RFC 1929. To support Java HTTP clients via libtailscale, who offer no other reliable hooks into their sockets. Signed-off-by: David Crawshaw <crawshaw@tailscale.com>	3 years ago
Andrew Dunham	f6cd24499b	net/portmapper: relax source port check for UPnP responses Per a packet capture provided, some gateways will reply to a UPnP discovery packet with a UDP packet with a source port that does not come from the UPnP port. Accept these packets with a log message. Updates #7377 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I5d4d5b2a0275009ed60f15c20b484fe2025d094b	3 years ago
Andrew Dunham	51eb0b2cb7	net/portmapper: send UPnP protocol in upper-case We were previously sending a lower-case "udp" protocol, whereas other implementations like miniupnp send an upper-case "UDP" protocol. For compatibility, use an upper-case protocol instead. Updates #7377 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I4aed204f94e4d51b7a256d29917af1536cb1b70f	3 years ago
Andrew Dunham	d379a25ae4	net/portmapper: don't pick external ports below 1024 Some devices don't let you UPnP portmap a port below 1024, so let's just avoid that range of ports entirely. Updates #7377 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: Ib7603b1c9a019162cdc4fa21744a2cae48bb1d86	3 years ago
Maisem Ali	1a30b2d73f	all: use tstest.Replace more Signed-off-by: Maisem Ali <maisem@tailscale.com>	3 years ago
Andrew Dunham	2d3ae485e3	net/interfaces: add better test for LikelyHomeRouterIP Return a mock set of interfaces and a mock gateway during this test and verify that LikelyHomeRouterIP returns the outcome we expect. Also verify that we return an error if there are no IPv4 addresses available. Follow-up to #7447 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I8f06989e7f1f0bebd108861cbff17b820ed2e6e4	3 years ago
Maisem Ali	b9ebf7cf14	tstest: add method to Replace values for tests We have many function pointers that we replace for the duration of test and restore it on test completion, add method to do that. Signed-off-by: Maisem Ali <maisem@tailscale.com>	3 years ago
Andrew Dunham	12100320d2	net/interfaces: always return an IPv4 LikelyHomeRouterIP We weren't filtering out IPv6 addresses from this function, so we could be returning an IPv4 gateway IP and an IPv6 self IP. Per the function comments, only return IPv4 addresses for the self IP. Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: If19a4aadc343fbd4383fc5290befa0eff006799e	3 years ago
Andrew Dunham	73fa7dd7af	util/slicesx: add package for generic slice functions, use Now that we're using rand.Shuffle in a few locations, create a generic shuffle function and use it instead. While we're at it, move the interleaveSlices function to the same package for use. Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I0b00920e5b3eea846b6cedc30bd34d978a049fd3	3 years ago
Andrew Dunham	3f8e8b04fd	cmd/tailscale, cmd/tailscaled: move portmapper debugging into tailscale CLI The debug flag on tailscaled isn't available in the macOS App Store build, since we don't have a tailscaled binary; move it to the 'tailscale debug' CLI that is available on all platforms instead, accessed over LocalAPI. Updates #7377 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I47bffe4461e036fab577c2e51e173f4003592ff7	3 years ago
Mihai Parparita	3e71e0ef68	net/sockstats: remove explicit dependency on wgengine/monitor Followup to #7177 to avoid adding extra dependencies to the CLI. We instead declare an interface for the link monitor. Signed-off-by: Mihai Parparita <mihai@tailscale.com>	3 years ago
Andrew Dunham	27575cd52d	net/dnsfallback: shuffle returned IPs This ensures that we're trying multiple returned IPs, since the DERP servers return the same response to all queries. This should increase the chances that we eventually reach a working IP. Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: Ie8d4fb93df96da910fae49ae71bf3e402b9fdecc	3 years ago
Mihai Parparita	9cb332f0e2	sockstats: instrument networking code paths Uses the hooks added by tailscale/go#45 to instrument the reads and writes on the major code paths that do network I/O in the client. The convention is to use "<package>.<type>:<label>" as the annotation for the responsible code path. Enabled on iOS, macOS and Android only, since mobile platforms are the ones we're most interested in, and we are less sensitive to any throughput degradation due to the per-I/O callback overhead (macOS is also enabled for ease of testing during development). For now just exposed as counters on a /v0/sockstats PeerAPI endpoint. We also keep track of the current interface so that we can break out the stats by interface. Updates tailscale/corp#9230 Updates #3363 Signed-off-by: Mihai Parparita <mihai@tailscale.com>	3 years ago
Mihai Parparita	780c56e119	ipn/ipnlocal: add delegated interface information to /interfaces PeerAPI handler Exposes the delegated interface data added by #7248 in the debug endpoint. I would have found it useful when working on that PR, and it may be handy in the future as well. Also makes the interfaces table slightly easier to parse by adding borders to it. To make then nicer-looking, the CSP was relaxed to allow inline styles. Signed-off-by: Mihai Parparita <mihai@tailscale.com>	3 years ago
David Anderson	8b2ae47c31	version: unexport all vars, turn Short/Long into funcs The other formerly exported values aren't used outside the package, so just unexport them. Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
Mihai Parparita	fa932fefe7	net/interfaces: redo how we get the default interface on macOS and iOS With #6566 we added an external mechanism for getting the default interface, and used it on macOS and iOS (see tailscale/corp#8201). The goal was to be able to get the default physical interface even when using an exit node (in which case the routing table would say that the Tailscale utun* interface is the default). However, the external mechanism turns out to be unreliable in some cases, e.g. when multiple cellular interfaces are present/toggled (I have occasionally gotten my phone into a state where it reports the pdp_ip1 interface as the default, even though it can't actually route traffic). It was observed that `ifconfig -v` on macOS reports an "effective interface" for the Tailscale utn* interface, which seems promising. By examining the ifconfig source code, it turns out that this is done via a SIOCGIFDELEGATE ioctl syscall. Though this is a private API, it appears to have been around for a long time (e.g. it's in the 10.13 xnu release at https://opensource.apple.com/source/xnu/xnu-4570.41.2/bsd/net/if_types.h.auto.html) and thus is unlikely to go away. We can thus use this ioctl if the routing table says that a utun* interface is the default, and go back to the simpler mechanism that we had before #6566. Updates #7184 Updates #7188 Signed-off-by: Mihai Parparita <mihai@tailscale.com>	3 years ago
Mihai Parparita	21fda7f670	net/routetable: include unknown flags in the routetable doctor output As part of the work on #7248 I wanted to know all of the flags on the RouteMessage struct that we get back from macOS. Though it doesn't turn out to be useful (when using an exit node/Tailscale is the default route, the flags for the physical interface routes are the same), it still seems useful from a debugging/comprehensiveness perspective. Adds additional Darwin flags that were output once I enabled this mode. Signed-off-by: Mihai Parparita <mihai@tailscale.com>	3 years ago
Tom DNetto	2ca6dd1f1d	wgengine: start logging DISCO frames to pcap stream Signed-off-by: Tom DNetto <tom@tailscale.com>	3 years ago
Colin Adler	3c107ff301	net/connstats: fix ticker in NewStatistics (#7225 ) `:=` was accidentally used, so `maxPeriod` never worked. Signed-off-by: Colin Adler <colin1adler@gmail.com>	3 years ago
Mihai Parparita	62f4df3257	net/interfaces, net/netns: add node attributes to control default interface getting and binding With #6566 we started to more aggressively bind to the default interface on Darwin. We are seeing some reports of the wrong cellular interface being chosen on iOS. To help with the investigation, this adds to knobs to control the behavior changes: - CapabilityDebugDisableAlternateDefaultRouteInterface disables the alternate function that we use to get the default interface on macOS and iOS (implemented in tailscale/corp#8201). We still log what it would have returned so we can see if it gets things wrong. - CapabilityDebugDisableBindConnToInterface is a bigger hammer that disables binding of connections to the default interface altogether. Updates #7184 Updates #7188 Signed-off-by: Mihai Parparita <mihai@tailscale.com>	3 years ago
Brad Fitzpatrick	2477fc4952	net/netutil: only check Linux sysctls w/ procfs, assume absent means false Fixes #7217 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Tom DNetto	99b9d7a621	all: implement pcap streaming for datapath debugging Updates: tailscale/corp#8470 Signed-off-by: Tom DNetto <tom@tailscale.com>	3 years ago
Mihai Parparita	0e3fb91a39	net/dns/resolver: remove maxDoHInFlight It was originally added to control memory use on iOS (#2490), but then was relaxed conditionally when running on iOS 15 (#3098). Now that we require iOS 15, there's no need for the limit at all, so simplify back to the original state. Signed-off-by: Mihai Parparita <mihai@tailscale.com>	3 years ago
Mihai Parparita	b6908181ff	net/tshttpproxy: more directly use Transport proxy CONNECT hooks GetProxyConnectHeader (golang/go#41048) was upstreamed in Go 1.16 and OnProxyConnectResponse (golang/go#54299) in Go 1.20, thus we no longer need to guard their use by the tailscale_go build tag. Updates #7123 Signed-off-by: Mihai Parparita <mihai@tailscale.com>	3 years ago
Andrew Dunham	880a41bfcc	net/dns/resolver: add envknob to debug exit node DNS queries on on Windows Add the envknob TS_DEBUG_EXIT_NODE_DNS_NET_PKG, which enables more verbose debug logging when calling the handleExitNodeDNSQueryWithNetPkg function. This function is currently only called on Windows and Android. Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: Ieb3ca7b98837d7dc69cd9ca47609c1c52e3afd7b	3 years ago
Brad Fitzpatrick	03645f0c27	net/{netns,netstat}: use new x/sys/cpu.IsBigEndian See golang/go#57237 Change-Id: If47ab6de7c1610998a5808e945c4177c561eab45 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Andrew Dunham	2755f3843c	health, net/tlsdial: add healthcheck for self-signed cert When we make a connection to a server, we previously would verify with the system roots, and then fall back to verifying with our baked-in Let's Encrypt root if the system root cert verification failed. We now explicitly check for, and log a health error on, self-signed certificates. Additionally, we now always verify against our baked-in Let's Encrypt root certificate and log an error if that isn't successful. We don't consider this a health failure, since if we ever change our server certificate issuer in the future older non-updated versions of Tailscale will no longer be healthy despite being able to connect. Updates #3198 Change-Id: I00be5ceb8afee544ee795e3c7a2815476abc4abf Signed-off-by: Andrew Dunham <andrew@du.nham.ca>	3 years ago
Brad Fitzpatrick	cf8dd7aa09	all: use Go 1.20's bytes.Clone Updates #7123 Updates #6257 (more to do in other repos) Change-Id: I073e2a6d81a5d7fbecc29caddb7e057ff65239d0 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	b1248442c3	all: update to Go 1.20, use strings.CutPrefix/Suffix instead of our fork Updates #7123 Updates #5309 Change-Id: I90bcd87a2fb85a91834a0dd4be6e03db08438672 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Maisem Ali	5bba65e978	net/memnet: rename from net/nettest This is just #cleanup to resolve a TODO Also add a package doc. Signed-off-by: Maisem Ali <maisem@tailscale.com>	3 years ago
Will Norris	947c14793a	all: update tools that manage copyright headers Update all code generation tools, and those that check for license headers to use the new standard header. Also update copyright statement in LICENSE file. Fixes #6865 Signed-off-by: Will Norris <will@tailscale.com>	3 years ago
Will Norris	71029cea2d	all: update copyright and license headers This updates all source files to use a new standard header for copyright and license declaration. Notably, copyright no longer includes a date, and we now use the standard SPDX-License-Identifier header. This commit was done almost entirely mechanically with perl, and then some minimal manual fixes. Updates #6865 Signed-off-by: Will Norris <will@tailscale.com>	3 years ago
Andrew Dunham	50da265608	net/netns: add post-review comments Follow-up to #7065 with some comments from Brad's review. Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: Ia1219f4fa25479b2dada38ffe421065b408c5954	3 years ago
Brad Fitzpatrick	2fc8de485c	net/netstat: document the Windows netstat code a bit more And defensively bound allocation. Updates tailscale/corp#8878 Change-Id: Iaa07479ea2ea28ee1ac3326ab025046d6d785b00 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Aaron Klotz	4a869048bf	net/netstat: add nil checks to Windows OSMetadata implementation The API documentation does claim to output empty strings under certain conditions, but we're sometimes seeing nil pointers in the wild, not empty strings. Fixes https://github.com/tailscale/corp/issues/8878 Signed-off-by: Aaron Klotz <aaron@tailscale.com>	3 years ago
Andrew Dunham	2703d6916f	net/netns: add functionality to bind outgoing sockets based on route table When turned on via environment variable (off by default), this will use the BSD routing APIs to query what interface index a socket should be bound to, rather than binding to the default interface in all cases. Updates #5719 Updates #5940 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: Ib4c919471f377b7a08cd3413f8e8caacb29fee0b	3 years ago
Andrew Dunham	44d73ce932	ipn/ipnlocal, net/dnscache: allow configuring dnscache logging via capability This allows users to temporarily enable/disable dnscache logging via a new node capability, to aid in debugging strange connectivity issues. Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I46cf2596a8ae4c1913880a78d0033f8b668edc08	3 years ago

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