tailscale

Commit Graph

Author	SHA1	Message	Date
Maisem Ali	9bb5a038e5	all: use atomic.Pointer Also add some missing docs. Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 years ago
Brad Fitzpatrick	5381437664	logtail, net/portmapper, wgengine/magicsock: use fmt.Appendf Fixes #5206 Change-Id: I490bb92e774ce7c044040537e2cd864fcf1dbe5a Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	5f6abcfa6f	all: migrate code from netaddr.FromStdAddr to Go 1.18 With caveat https://github.com/golang/go/issues/53607#issuecomment-1203466984 that then requires a new wrapper. But a simpler one at least. Updates #5162 Change-Id: I0a5265065bfcd7f21e8dd65b2bd74cae90d76090 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	8725b14056	all: migrate more code code to net/netip directly Instead of going through the tailscale.com/net/netaddr transitional wrappers. Updates #5162 Change-Id: I3dafd1c2effa1a6caa9b7151ecf6edd1a3fda3dd Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	116f55ff66	all: gofmt for Go 1.19 Updates #5210 Change-Id: Ib02cd5e43d0a8db60c1f09755a8ac7b140b670be Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Aaron Klotz	4dbdb19c26	net/tshttpproxy: fix incorrect type in Windows implementation, switch to mkwinsyscall, fix memory leak The definition of winHTTPProxyInfo was using the wrong type (uint16 vs uint32) for its first field. I fixed that type. Furthermore, any UTF16 strings returned in that structure must be explicitly freed. I added code to do this. Finally, since this is the second time I've seen type safety errors in this code, I switched the native API calls over to use wrappers generated by mkwinsyscall. I know that would not have helped prevent the previous two problems, but every bit helps IMHO. Updates https://github.com/tailscale/tailscale/issues/4811 Signed-off-by: Aaron Klotz <aaron@tailscale.com>	2 years ago
nyghtowl	e6e1976c3a	net/dns: remove systemd-resolved ping Ping only needed to ensure system awak otherwise utilizing resolvConf to set dns mode. Signed-off-by: nyghtowl <warrick@tailscale.com>	2 years ago
Brad Fitzpatrick	a12aad6b47	all: convert more code to use net/netip directly perl -i -npe 's,netaddr.IPPrefixFrom,netip.PrefixFrom,' $(git grep -l -F netaddr.) perl -i -npe 's,netaddr.IPPortFrom,netip.AddrPortFrom,' $(git grep -l -F netaddr. ) perl -i -npe 's,netaddr.IPPrefix,netip.Prefix,g' $(git grep -l -F netaddr. ) perl -i -npe 's,netaddr.IPPort,netip.AddrPort,g' $(git grep -l -F netaddr. ) perl -i -npe 's,netaddr.IP\b,netip.Addr,g' $(git grep -l -F netaddr. ) perl -i -npe 's,netaddr.IPv6Raw\b,netip.AddrFrom16,g' $(git grep -l -F netaddr. ) goimports -w . Then delete some stuff from the net/netaddr shim package which is no longer neeed. Updates #5162 Change-Id: Ia7a86893fe21c7e3ee1ec823e8aba288d4566cd8 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	6a396731eb	all: use various net/netip parse funcs directly Mechanical change with perl+goimports. Changed {Must,}Parse{IP,IPPrefix,IPPort} to their netip variants, then goimports -d . Finally, removed the net/netaddr wrappers, to prevent future use. Updates #5162 Change-Id: I59c0e38b5fbca5a935d701645789cddf3d7863ad Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	7eaf5e509f	net/netaddr: start migrating to net/netip via new netaddr adapter package Updates #5162 Change-Id: Id7bdec303b25471f69d542f8ce43805328d56c12 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Aaron Klotz	1cae618b03	net/dns: add Windows group policy notifications to the NRPT rule manager As discussed in previous PRs, we can register for notifications when group policies are updated and act accordingly. This patch changes nrptRuleDatabase to receive notifications that group policy has changed and automatically move our NRPT rules between the local and group policy subkeys as needed. Signed-off-by: Aaron Klotz <aaron@tailscale.com>	2 years ago
Melanie Warrick	f17873e0f4	net/dns: handle D-Bus restarts in resolved manager (#5026 ) When dbus restarts it can cause the tailscaled to crash because the nil signal was not handled in resolved.Fixing so the nil signal leads to a connection reset and tailscaled stays connected to systemd when dbus restarted. Fixes #4645 Co-authored-by: James Tucker <james@tailscale.com> Signed-off-by: nyghtowl <warrick@tailscale.com> Co-authored-by: James Tucker <james@tailscale.com>	2 years ago
Maisem Ali	9514ed33d2	go.mod: bump gvisor.dev/gvisor Pick up https://github.com/google/gvisor/pull/7787 Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 years ago
David Anderson	c1cb3efbba	net/netcheck: test for OS IPv6 support as well as connectivity. This lets us distinguish "no IPv6 because the device's ISP doesn't offer IPv6" from "IPv6 is unavailable/disabled in the OS". Signed-off-by: David Anderson <danderson@tailscale.com>	2 years ago
Brad Fitzpatrick	0d52674a84	net/tstun: diagnose /dev/net/tun fd leak, give better failure message Updates #5029 Change-Id: Ibee5e0c9076fe764eb5d856d5ef8b09f4d0e2921 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Andrew Dunham	c7993d2b88	net/dns/resolver: add fuzz/unit test for #2533 (#5018 ) Signed-off-by: Andrew Dunham <andrew@du.nham.ca>	2 years ago
Tom DNetto	d6817d0f22	net/dns/resolver: respond with SERVFAIL if all upstreams fail Fixes #4722 Signed-off-by: Tom DNetto <tom@tailscale.com>	2 years ago
Mihai Parparita	ec649e707f	ipn/ipnlocal: prefer to use one CGNAT route on the Mac Together with `06aa141632` this minimizes the number of NEPacketTunnelNetworkSettings updates that we have to do, and thus avoids Chrome interrupting outstanding requests due to (perceived) network changes. Updates #3102 Signed-off-by: Mihai Parparita <mihai@tailscale.com>	2 years ago
Brad Fitzpatrick	aa37aece9c	ipn/ipnlocal, net/dns, util/cloudenv: add AWS DNS support And remove the GCP special-casing from ipn/ipnlocal; do it only in the forwarder for .internal. Fixes #4980 Fixes #4981 Change-Id: I5c481e96d91f3d51d274a80fbd37c38f16dfa5cb Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	88c2afd1e3	ipn/ipnlocal, net/dns, util/cloudenv: specialize DNS config on Google Cloud This does three things: If you're on GCP, it adds a .internal DNS split route to the metadata server, so we never break GCP DNS names. This lets people have some Tailscale nodes on GCP and some not (e.g. laptops at home) without having to add a Tailnet-wide .internal DNS route. If you already have such a route, though, it won't overwrite it. * If the 100.100.100.100 DNS forwarder has nowhere to forward to, it forwards it to the GCP metadata IP, which forwards to 8.8.8.8. This means there are never errNoUpstreams ("upstream nameservers not set") errors on GCP due to e.g. mangled /etc/resolv.conf (GCP default VMs don't have systemd-resolved, so it's likely a DNS supremacy fight) * makes the DNS fallback mechanism use the GCP metadata IP as a fallback before our hosted HTTP-based fallbacks I created a default GCP VM from their web wizard. It has no systemd-resolved. I then made its /etc/resolv.conf be empty and deleted its GCP hostnames in /etc/hosts. I then logged in to a tailnet with no global DNS settings. With this, tailscaled writes /etc/resolv.conf (direct mode, as no systemd-resolved) and sets it to 100.100.100.100, which then has regular DNS via the metadata IP and .internal DNS via the metadata IP as well. If the tailnet configures explicit DNS servers, those are used instead, except for .internal. This also adds a new util/cloudenv package based on version/distro where the cloud type is only detected once. We'll likely expand it in the future for other clouds, doing variants of this change for other popular cloud environments. Fixes #4911 RELNOTES=Google Cloud DNS improvements Change-Id: I19f3c2075983669b2b2c0f29a548da8de373c7cf Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Denton Gentry	d7f452c0a1	net/portmapper: send discovery packet for IGD specifically. There appear to be devices out there which send only their first descriptor in response to a discovery packet for `ssdp:all`, for example the Sagemcom FAST3890V3 only sends urn:schemas-wifialliance-org:device:WFADevice:1 Send both ssdp:all and a discovery frame for InternetGatewayDevice specifically. Updates https://github.com/tailscale/tailscale/issues/3557 Signed-off-by: Denton Gentry <dgentry@tailscale.com>	2 years ago
Denton Gentry	09eaba91ad	net/portmap: add a test for Sagemcom FAST3890V3. Updates https://github.com/tailscale/tailscale/issues/3557 Signed-off-by: Denton Gentry <dgentry@tailscale.com>	2 years ago
Denton Gentry	b5553c6ad2	net/portmap: run go fmt Signed-off-by: Denton Gentry <dgentry@tailscale.com>	2 years ago
Denton Gentry	de4c635e54	net/portmapper: make pcpCodeNotAuthorized log more descriptive If PCP is present but disabled, turning it on might help get direct connections. Signed-off-by: Denton Gentry <dgentry@tailscale.com>	2 years ago
Aaron Klotz	4baf34cf25	net/dns: set appropriate Windows registry values to prevent it from sending DNS changes concerning our interface to AD domain controllers. We do this unconditionally inside SetDNS such that the values are always set before we make any other changes to DNS configurations. It should not be harmful for the settings to remain even when other DNS settings are cleared out (since they only affect our network interface). See https://docs.microsoft.com/en-us/troubleshoot/windows-server/networking/configure-dns-dynamic-updates-windows-server-2003 for details about the registry value. Fixes https://github.com/tailscale/tailscale/issues/4829 Signed-off-by: Aaron Klotz <aaron@tailscale.com>	2 years ago
Aaron Klotz	8cdfd12977	net/dns: update Windows split DNS settings to work alongside other NRPT entries set by group policy. When there are group policy entries for the NRPT that do not belong to Tailscale, we recognize that we need to add ourselves to group policy and use that registry key instead of the local one. We also refresh the group policy settings as necessary to ensure that our changes take effect immediately. Fixes https://github.com/tailscale/tailscale/issues/4607 Signed-off-by: Aaron Klotz <aaron@tailscale.com>	2 years ago
Brad Fitzpatrick	13d0b8e6a4	control/controlclient, net/dnscache: use typed singleflight fork Change-Id: I12be4c5a91ae3a812fe88d9b2d15526fdbb5a921 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Denton Gentry	1392a93445	socks5: add a simple test Start up a backend service, put a SOCKS5 server in front of it, and verify that we can get data from the backend via SOCKS5. Signed-off-by: Denton Gentry <dgentry@tailscale.com>	2 years ago
Denton Gentry	7fffddce8e	net/portmapper: enable for iOS In the 1.27 unstable releases we set the min-version to iOS15, which means we have 50 MBytes of RAM in the Network Extension. https://tailscale.com/blog/go-linker/ Include the UPnP/NAT-PMP/PCP portmapper support now that there is memory for it. Fixes https://github.com/tailscale/tailscale/issues/2495 Signed-off-by: Denton Gentry <dgentry@tailscale.com>	2 years ago
Mihai Parparita	edc90ebc61	net/wsconn: remove homegrown wrapper for turning a websocket.Conn into a net.Conn The one from the nhooyr/websocket package seems to work equally well. Signed-off-by: Mihai Parparita <mihai@tailscale.com>	2 years ago
Mihai Parparita	27a1ad6a70	wasm: exclude code that's not used on iOS for Wasm too It has similar size constraints. Saves ~1.9MB from the Wasm build. Updates #3157 Signed-off-by: Mihai Parparita <mihai@tailscale.com>	2 years ago
Mihai Parparita	a9f32656f5	control/controlhttp: allow client and server to communicate over WebSockets We can't do Noise-over-HTTP in Wasm/JS (because we don't have bidirectional communication), but we should be able to do it over WebSockets. Reuses derp WebSocket support that allows us to turn a WebSocket connection into a net.Conn. Updates #3157 Signed-off-by: Mihai Parparita <mihai@tailscale.com>	2 years ago
Maisem Ali	80157f3f37	net/dns/resolver: add support for <IPv4>.via-<site-id> Currently we only support "via-<site-id>.<IPv4>", however that does not work with Google Chrome which parses `http://via-1.10.0.0.1` as a search string and not as a URL. This commit introduces "<IPv4>.via-<site-id>" (`http://10.0.0.1.via-1`) which is parsed correctly by Chrome. Updates #3616 Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 years ago
Brad Fitzpatrick	1336fb740b	wgengine/netstack: make netstack MTU be 1280 also Updates #3878 Change-Id: I1850085b32c8a40d85607b4ad433622c97d96a8d Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Aaron Klotz	b005b79236	net/dns, paths, util/winutil: change net/dns/windowsManager NRPT management to support more than 50 domains. AFAICT this isn't documented on MSDN, but based on the issue referenced below, NRPT rules are not working when a rule specifies > 50 domains. This patch modifies our NRPT rule generator to split the list of domains into chunks as necessary, and write a separate rule for each chunk. For compatibility reasons, we continue to use the hard-coded rule ID, but as additional rules are required, we generate new GUIDs. Those GUIDs are stored under the Tailscale registry path so that we know which rules are ours. I made some changes to winutils to add additional helper functions in support of both the code and its test: I added additional registry accessors, and also moved some token accessors from paths to util/winutil. Fixes https://github.com/tailscale/coral/issues/63 Signed-off-by: Aaron Klotz <aaron@tailscale.com>	2 years ago
Tom	acfe5bd33b	net/dns{., resolver}: time out DNS queries after 10 seconds (#4690 ) Fixes https://github.com/tailscale/corp/issues/5198 The upstream forwarder will block indefinitely on `udpconn.ReadFrom` if no reply is recieved, due to the lack of deadline on the connection object. There still isn't a deadline on the connection object, but the automatic closing of the context on deadline expiry will close the connection via `closeOnCtxDone`, unblocking the read and resulting in a normal teardown. Signed-off-by: Tom DNetto <tom@tailscale.com>	2 years ago
Mihai Parparita	86069874c9	net/tstun, wgengine: use correct type for counter metrics We were marking them as gauges, but they are only ever incremented, thus counter is more appropriate. Signed-off-by: Mihai Parparita <mihai@tailscale.com>	3 years ago
Maisem Ali	fd99c54e10	tailcfg,all: change structs to []*dnstype.Resolver Signed-off-by: Maisem Ali <maisem@tailscale.com>	3 years ago
Tom	d1d6ab068e	net/dns, wgengine: implement DNS over TCP (#4598 ) * net/dns, wgengine: implement DNS over TCP Signed-off-by: Tom DNetto <tom@tailscale.com> * wgengine/netstack: intercept only relevant port/protocols to quad-100 Signed-off-by: Tom DNetto <tom@tailscale.com>	3 years ago
James Tucker	f9e86e64b7	*: use WireGuard where logged, printed or named Signed-off-by: James Tucker <james@tailscale.com>	3 years ago
James Tucker	ae483d3446	wgengine, net/packet, cmd/tailscale: add ICMP echo Updates tailscale/corp#754 Signed-off-by: James Tucker <james@tailscale.com>	3 years ago
Tom DNetto	2a0b5c21d2	net/dns/{., resolver}, wgengine: fix goroutine leak on shutdown Signed-off-by: Tom DNetto <tom@tailscale.com>	3 years ago
Tom DNetto	7f45734663	assorted: documentation and readability fixes This were intended to be pushed to #4408, but in my excitement I forgot to git push :/ better late than never. Signed-off-by: Tom DNetto <tom@tailscale.com>	3 years ago
Tom DNetto	9e77660931	net/tstun,wgengine/{.,netstack}: handle UDP magicDNS traffic in netstack This change wires netstack with a hook for traffic coming from the host into the tun, allowing interception and handling of traffic to quad-100. With this hook wired, magicDNS queries over UDP are now handled within netstack. The existing logic in wgengine to handle magicDNS remains for now, but its hook operates after the netstack hook so the netstack implementation takes precedence. This is done in case we need to support platforms with netstack longer than expected. Signed-off-by: Tom DNetto <tom@tailscale.com>	3 years ago
Tom DNetto	dc71d3559f	net/tstun,wgengine: split PreFilterOut into multiple hooks A subsequent commit implements handling of magicDNS traffic via netstack. Implementing this requires a hook for traffic originating from the host and hitting the tun, so we make another hook to support this. Signed-off-by: Tom DNetto <tom@tailscale.com>	3 years ago
Tom DNetto	5b85f848dd	net/dns,net/dns/resolver: refactor channels/magicDNS out of Resolver Moves magicDNS-specific handling out of Resolver & into dns.Manager. This greatly simplifies the Resolver to solely issuing queries and returning responses, without channels. Enforcement of max number of in-flight magicDNS queries, assembly of synthetic UDP datagrams, and integration with wgengine for recieving/responding to magicDNS traffic is now entirely in Manager. This path is being kept around, but ultimately aims to be deleted and replaced with a netstack-based path. This commit is part of a series to implement magicDNS using netstack. Signed-off-by: Tom DNetto <tom@tailscale.com>	3 years ago
Brad Fitzpatrick	6bed781259	all: gofmt all Well, goimports actually (which adds the normal import grouping order we do) Change-Id: I0ce1b1c03185f3741aad67c14a7ec91a838de389 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
James Tucker	96fec4b969	net/tshttpproxy: synology: pick proxy by scheme This updates the fix from #4562 to pick the proxy based on the request scheme. Updates #4395, #2605, #4562 Signed-off-by: James Tucker <james@tailscale.com>	3 years ago
Maisem Ali	eff6a404a6	net/tshttpproxy: use http as the scheme for proxies Currently we try to use `https://` when we see `https_host`, however that doesn't work and results in errors like `Received error: fetch control key: Get "https://controlplane.tailscale.com/key?v=32": proxyconnect tcp: tls: first record does not look like a TLS handshake` This indiciates that we are trying to do a HTTPS request to a HTTP server. Googling suggests that the standard is to use `http` regardless of `https` or `http` proxy Updates #4395, #2605 Signed-off-by: Maisem Ali <maisem@tailscale.com>	3 years ago
Maisem Ali	5a1ef1bbb9	net/tsdial: add SystemDial as a wrapper on netns.Dial The connections returned from SystemDial are automatically closed when there is a major link change. Also plumb through the dialer to the noise client so that connections are auto-reset when moving from cellular to WiFi etc. Updates #3363 Signed-off-by: Maisem Ali <maisem@tailscale.com>	3 years ago
Brad Fitzpatrick	c6c752cf64	net/tshttpproxy: fix typo Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Tom DNetto	5fb8e01a8b	net/dns/resolver: add metric for number of truncated dns packets Updates #2067 This should help us determine if more robust control of edns parameters + implementing answer truncation is warranted, given its likely complexity. Signed-off-by: Tom DNetto <tom@tailscale.com>	3 years ago
Brad Fitzpatrick	e97209c6bf	net/dns: add tailscaled-on-macOS DNS OSConfigurator This populates DNS suffixes ("ts.net", etc) in /etc/resolver/* files to point to 100.100.100.100 so MagicDNS works. It also sets search domains. Updates #4276 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Tom DNetto	78fededaa5	net/dns/resolver: support magic resolution of via-<siteid>.<ip4> domains Updates #3616 Signed-off-by: Tom DNetto <tom@tailscale.com>	3 years ago
James Tucker	700bd37730	tshttpproxy: support synology proxy configuration Fixes #4395 Fixes #2605 Signed-off-by: James Tucker <james@tailscale.com>	3 years ago
Tom DNetto	df26c63793	net/dns/resolver, net/tsaddr: fix reverse lookups in 4to6 IP range Fixes #4439 Signed-off-by: Tom DNetto <tom@tailscale.com>	3 years ago
Brad Fitzpatrick	d413850bd7	cmd/tailscale: add "debug via" subcommand to do CIDR math for via ranges $ tailscale debug via 0xb 10.2.0.0/16 fd7a:115c:a1e0:b1a:0🅱️a02:0/112 $ tailscale debug via fd7a:115c:a1e0:b1a:0🅱️a02:0/112 site 11 (0xb), 10.2.0.0/16 Previously: `3ae701f0eb` This adds a little debug tool to do CIDR math to make converting between those ranges easier for now. Updates #3616 Change-Id: I98302e95d17765bfaced3ecbb71cbd43e84bff46 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Tom DNetto	c8f4dfc8c0	derp/derphttp,net/netcheck: improve netcheck behavior under MITM proxies In cases where tailscale is operating behind a MITM proxy, we need to consider that a lot more of the internals of our HTTP requests are visible and may be used as part of authorization checks. As such, we need to 'behave' as closely as possible to ideal. - Some proxies do authorization or consistency checks based the on Host header or HTTP URI, instead of just the IP/hostname/SNI. As such, we need to construct a `*http.Request` with a valid URI everytime HTTP is going to be used on the wire, even if its over TLS. Aside from the singular instance in net/netcheck, I couldn't find anywhere else a http.Request was constructed incorrectly. - Some proxies may deny requests, typically by returning a 403 status code. We should not consider these requests as a valid latency check, so netcheck semantics have been updated to consider >299 status codes as a failed probe. Signed-off-by: Tom DNetto <tom@tailscale.com>	3 years ago
Brad Fitzpatrick	cc575fe4d6	net/dns: schedule DoH upgrade explicitly, fix Resolver.Addr confusion Two changes in one: * make DoH upgrades an explicitly scheduled send earlier, when we come up with the resolvers-and-delay send plan. Previously we were getting e.g. four Google DNS IPs and then spreading them out in time (for back when we only did UDP) but then later we added DoH upgrading at the UDP packet layer, which resulted in sometimes multiple DoH queries to the same provider running (each doing happy eyeballs dialing to 4x IPs themselves) for each of the 4 source IPs. Instead, take those 4 Google/Cloudflare IPs and schedule 5 things: first the DoH query (which can use all 4 IPs), and then each of the 4 IPs as UDP later. * clean up the dnstype.Resolver.Addr confusion; half the code was using it as an IP string (as documented) as half was using it as an IP:port (from some prior type we used), primarily for tests. Instead, document it was being primarily an IP string but also accepting an IP:port for tests, then add an accessor method on it to get the IPPort and use that consistently everywhere. Change-Id: Ifdd72b9e45433a5b9c029194d50db2b9f9217b53 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	e3a4952527	net/dns/resolver: count errors when racing DNS queries, fail earlier If all N queries failed, we waited until context timeout (in 5 seconds) to return. This makes (*forwarder).forward fail fast when the network's unavailable. Change-Id: Ibbb3efea7ed34acd3f3b29b5fee00ba8c7492569 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	d9efbd97cb	net/dns: remove an unused function Change-Id: I7c920c76223ffac37954ef2a18754afc52177598 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	ecea6cb994	net/dns/resolver: make DoH dialer use existing dnscache happy eyeball dialer Simplify the ability to reason about the DoH dialing code by reusing the dnscache's dialer we already have. Also, reduce the scope of the "ip" variable we don't want to close over. This necessarily adds a new field to dnscache.Resolver: SingleHostStaticResult, for when the caller already knows the IPs to be returned. Change-Id: I9f2aef7926f649137a5a3e63eebad6a3fffa48c0 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	f4f76eb275	net/dnsfallback: update from 'go generate' Change-Id: I93e0e6d9a4a471953c1ffef07f32605c5724aed8 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
phirework	52d32c94d8	net/dns/publicdns: add missing call to sync.Once.Do (#4410 ) Signed-off-by: Jenny Zhang <jz@tailscale.com>	3 years ago
phirework	83c734a6e0	net/dns, util/publicdns: extract public DNS mapping into own package (#4405 ) This extracts DOH mapping of known public DNS providers in forwarder.go into its own package, to be consumed by other repos Signed-off-by: Jenny Zhang <jz@tailscale.com>	3 years ago
Brad Fitzpatrick	a49d8d5200	Revert ".github/workflows: work around golang/go#51629" This reverts commit `2a412ac9ee`. Updates #4194 Change-Id: I0098b66b71d20bea301ca79058c1cdd201237dd0 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	3ae701f0eb	net/tsaddr, wgengine/netstack: add IPv6 range that forwards to site-relative IPv4 This defines a new magic IPv6 prefix, fd7a:115c:a1e0:b1a::/64, a subset of our existing /48, where the final 32 bits are an IPv4 address, and the middle 32 bits are a user-chosen "site ID". (which must currently be 0000:00xx; the top 3 bytes must be zero for now) e.g., I can say my home LAN's "site ID" is "0000:00bb" and then advertise its 10.2.0.0/16 IPv4 range via IPv6, like: tailscale up --advertise-routes=fd7a:115c:a1e0:b1a::bb:10.2.0.0/112 (112 being /128 minuse the /96 v6 prefix length) Then people in my tailnet can: $ curl '[fd7a:115c:a1e0:b1a::bb:10.2.0.230]' <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" .... Updates #3616, etc RELNOTE=initial support for TS IPv6 addresses to route v4 "via" specific nodes Change-Id: I9b49b6ad10410a24b5866b9fbc69d3cae1f600ef Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Tom	24bdcbe5c7	net/dns, net/dns/resolver, wgengine: refactor DNS request path (#4364 ) * net/dns, net/dns/resolver, wgengine: refactor DNS request path Previously, method calls into the DNS manager/resolver types handled DNS requests rather than DNS packets. This is fine for UDP as one packet corresponds to one request or response, however will not suit an implementation that supports DNS over TCP. To support PRs implementing this in the future, wgengine delegates all handling/construction of packets to the magic DNS endpoint, to the DNS types themselves. Handling IP packets at this level enables future support for both UDP and TCP. Signed-off-by: Tom DNetto <tom@tailscale.com>	3 years ago
Tom	6be7931eb4	net/dns/resolver: return symbolic PTR records for TS service IPs (#4361 ) Fixes #1233 Signed-off-by: Tom DNetto <tom@tailscale.com> Co-authored-by: Tom DNetto <tom@tailscale.com>	3 years ago
Maisem Ali	309ddef852	net/netutil: add CheckIPForwardingLinux (#4301 ) Combine the code between `LocalBackend.CheckIPForwarding` and `controlclient.ipForwardingBroken`. Fixes #4300 Signed-off-by: Maisem Ali <maisem@tailscale.com>	3 years ago
Brad Fitzpatrick	e4d8d5e78b	net/packet, wgengine/netstack: remove workaround for old gvisor ECN bug Fixes #2642 Change-Id: Ic02251d24a4109679645d1c8336e0f961d0cce13 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	753f1bfad4	cmd/tailscale: write fewer known_hosts, resolve ssh host to FQDN early Updates #3802 Change-Id: Ic44fa2e6661a9c046e725c04fa6b8213d3d4d2b2 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Maisem Ali	b2f269d5b7	net/dnsfallback: do not attempt lookups of IPs. Currently if the passed in host is an IP, Lookup still attempts to resolve it with a dns server. This makes it just return the IP directly. Updates tailscale/corp#4475 Signed-off-by: Maisem Ali <maisem@tailscale.com>	3 years ago
Maisem Ali	b45bb577a0	net/dnscache: do not call LookupIPFallback if the context was canceled. When the context is canceled, dc.dialOne returns an error from line 345. This causes the defer on line 312 to try to resolve the host again, which triggers a dns lookup of "127.0.0.1" from derp. Updates tailscale/corp#4475 Signed-off-by: Maisem Ali <maisem@tailscale.com>	3 years ago
Brad Fitzpatrick	b647977b33	net/netutil: move some net utils from control/controlhttp to netutil In prep for reuse elsewhere. Change-Id: I1b804edf76ac66b9108e6f434e77eab7a7472d69 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
James Tucker	445c04c938	wgengine: inject packetbuffers rather than bytes (#4220 ) Plumb the outbound injection path to allow passing netstack PacketBuffers down to the tun Read, where they are decref'd to enable buffer re-use. This removes one packet alloc & copy, and reduces GC pressure by pooling outbound injected packets. Fixes #2741 Signed-off-by: James Tucker <james@tailscale.com>	3 years ago
Brad Fitzpatrick	f2041c9088	all: use strings.Cut even more Change-Id: I943ce72c6f339589235bddbe10d07799c4e37979 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Aaron Klotz	6e91f872af	net/tshttpproxy: ensure we pass the correct flags to WinHttpOpen on Win7 and Win8.0 The best flag to use on Win7 and Win8.0 is deprecated in Win8.1, so we resolve the flag depending on OS version info. Fixes https://github.com/tailscale/tailscale/issues/4201 Signed-off-by: Aaron Klotz <aaron@tailscale.com>	3 years ago
David Anderson	2a412ac9ee	.github/workflows: work around golang/go#51629 Incidentally, simplify the go generate CI workflow, by marking the dnsfallback update non-hermetic (so CI will skip it) rather than manually filter it out of `go list`. Updates #4194 Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
Josh Bleecher Snyder	0868329936	all: use any instead of interface{} My favorite part of generics. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Brad Fitzpatrick	61ee72940c	all: use Go 1.18's strings.Cut More remain. Change-Id: I6ec562cc1f687600758deae1c9d7dbd0d04004cb Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Josh Bleecher Snyder	0ef74f37a5	net/dns/resolver: remove closure allocation explanation As of Go 1.18, the register ABI list includes arm64, amd64, ppc64, and ppc64le. This is a large enough percentage of the architectures that it's not worth explaining. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Brad Fitzpatrick	61cdcf4082	net/interfaces: add FreeBSD default route lookup (portmapping, etc) Updates #4101 (probably fixes) Change-Id: I2b75ee3ced276fb7b211f17c382621cf1ef882fa Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Maisem Ali	2fb087891b	net/socks5: always close client connections after serving Customer reported an issue where the connections were not closing, and would instead just stay open. This commit makes it so that we close out the connection regardless of what error we see. I've verified locally that it fixes the issue, we should add a test for this. Signed-off-by: Maisem Ali <maisem@tailscale.com>	3 years ago
Brad Fitzpatrick	b493ef5b71	net/tsaddr: add func ContainsExitRoutes Change-Id: I772441a406083e2fe0f9374b2b23d89aac18928f Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	55095df644	net/interfaces: get Linux default route from netlink as fallback If it's in a non-standard table, as it is on Unifi UDM Pro, apparently. Updates #4038 (probably fixes, but don't have hardware to verify) Change-Id: I2cb9a098d8bb07d1a97a6045b686aca31763a937 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Dmytro Shynkevych	d9a7205be5	net/tstun: set link speed to SPEED_UNKNOWN Fixes #3933. Signed-off-by: Dmytro Shynkevych <dm.shynk@gmail.com>	3 years ago
Brad Fitzpatrick	7d897229d9	net/dns: ignore permission errors on Synology DSM7 for now Updates #4017 Change-Id: Ia7fd4df47588c010dea8e63d88f397cc8eb748e5 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	bb94561c96	net/netutil: fix regression where peerapi would get closed after 1st req I introduced a bug in `8fe503057d` when unifying oneConnListener implementations. The NewOneConnListenerFrom API was easy to misuse (its Close method closes the underlying Listener), and we did (via http.Serve, which closes the listener after use, which meant we were close the peerapi's listener, even though we only wanted its Addr) Instead, combine those two constructors into one and pass in the Addr explicitly, without delegating through to any Listener. Change-Id: I061d7e5f842e0cada416e7b2dd62100d4f987125 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	2ff481ff10	net/dns: add health check for particular broken-ish Linux DNS config Updates #3937 (need to write docs before closing) Change-Id: I1df7244cfbb0303481e2621ee750d21358bd67c6 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	c988bd6ed1	net/dns/resolvconffile: unify three /etc/resolv.conf parsers into new package Change-Id: I2120893ca802d12f1bd0407d49077d3672627d33 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	8d6cf14456	net/dnscache: don't do bootstrap DNS lookup after most failed dials If we've already connected to a certain name's IP in the past, don't assume the problem was DNS related. That just puts unnecessarily load on our bootstrap DNS servers during regular restarts of Tailscale infrastructure components. Also, if we do do a bootstrap DNS lookup and it gives the same IP(s) that we already tried, don't try them again. Change-Id: I743e8991a7f957381b8e4c1508b8e9d0df1782fe Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	903988b392	net/dnscache: refactor from func-y closure-y state to types & methods No behavior changes (intended, at least). This is in prep for future changes to this package, which would get too complicated in the current style. Change-Id: Ic260f8e34ae2f64f34819d4a56e38bee8d8ac5ce Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	8267ea0f80	net/tstun: remove TODO that's done This TODO was both added and fixed in `506c727e3`. As I recall, I wasn't originally going to do it because it seemed annoying, so I wrote the TODO, but then I felt bad about it and just did it, but forgot to remove the TODO. Change-Id: I8f3514809ad69b447c62bfeb0a703678c1aec9a3 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	8fe503057d	net/netutil: unify two oneConnListeners into a new package I was about to add a third copy, so unify them now instead. Change-Id: I3b93896aa1249b1250a6b1df4829d57717f2311a Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	21358cf2f5	net/dns: slightly optimize dbusPing for non-dbus case [Linux] Avoid some work when D-Bus isn't running. Change-Id: I6f89bb75fdb24c13f61be9b400610772756db1ef Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	37e7a387ff	net/dns: remove some unused code for detecting systemd-resolved [Linux] Change-Id: I19c5fd2cdacfb9e5b688ccd9b4336ae4edffc445 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	15599323a1	net/dns: fix systemd-resolved detection race at boot If systemd-resolved is enabled but not running (or not yet running, such as early boot) and resolv.conf is old/dangling, we weren't detecting systemd-resolved. This moves its ping earlier, which will trigger it to start up and write its file. Updates #3362 (likely fixes) Updates #3531 (likely fixes) Change-Id: I6392944ac59f600571c43b8f7a677df224f2beed Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Denton Gentry	dbea8217ac	net/dns: add NetworkManager regression test Use the exact /etc/resolv.conf file from a user report. Updates https://github.com/tailscale/tailscale/issues/3531 Signed-off-by: Denton Gentry <dgentry@tailscale.com>	3 years ago
Brad Fitzpatrick	2a67beaacf	net/interfaces: bound Linux /proc/net/route parsing tailscaled was using 100% CPU on a machine with ~1M lines, 100MB+ of /proc/net/route data. Two problems: in likelyHomeRouterIPLinux, we didn't stop reading the file once we found the default route (which is on the first non-header line when present). Which meant it was finding the answer and then parsing 100MB over 1M lines unnecessarily. Second was that if the default route isn't present, it'd read to the end of the file looking for it. If it's not in the first 1,000 lines, it ain't coming, or at least isn't worth having. (it's only used for discovering a potential UPnP/PMP/PCP server, which is very unlikely to be present in the environment of a machine with a ton of routes) Change-Id: I2c4a291ab7f26aedc13885d79237b8f05c2fd8e4 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago

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670 Commits (e24de8a617d202f7eef9e7158c16196b21cf5dca)