106 Commits (4d94d72fbaa48d4a3bdaa693aaaa723ae9ea4da6)

Author	SHA1	Message	Date
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>	2 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>	2 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	2 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>	2 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>	2 years ago
Maisem Ali	1a30b2d73f	all: use tstest.Replace more ... Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 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	2 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	2 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>	2 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>	2 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>	2 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>	2 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>	2 years ago
Jordan Whited	ea5ee6f87c	all: update golang.zx2c4.com/wireguard to github.com/tailscale/wireguard-go (#6692) ... This is temporary while we work to upstream performance work in https://github.com/WireGuard/wireguard-go/pull/64. A replace directive is less ideal as it breaks dependent code without duplication of the directive. Signed-off-by: Jordan Whited <jordan@tailscale.com>	2 years ago
Mihai Parparita	79f3a5d753	net/netns, net/interfaces: explicitly bind sockets to the default interface on all Darwin variants ... We were previously only doing this for tailscaled-on-Darwin, but it also appears to help on iOS. Otherwise, when we rebind magicsock UDP connections after a cellular -> WiFi interface change they still keep using cellular one. To do this correctly when using exit nodes, we need to exclude the Tailscale interface when getting the default route, otherwise packets cannot leave the tunnel. There are native macOS/iOS APIs that we can use to do this, so we allow those clients to override the implementation of DefaultRouteInterfaceIndex. Updates #6565, may also help with #5156 Signed-off-by: Mihai Parparita <mihai@tailscale.com>	2 years ago
Brad Fitzpatrick	3114eacbb8	ipn/ipnlocal: don't warn about serve listener failing on IPv6-less machines ... Fixes #6303 Change-Id: Ie1ce12938f68dfa0533246bbe3b9d7f3e749a243 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	da8def8e13	all: remove old +build tags ... The //go:build syntax was introduced in Go 1.17: https://go.dev/doc/go1.17#build-lines gofmt has kept the +build and go:build lines in sync since then, but enough time has passed. Time to remove them. Done with: perl -i -npe 's,^// \+build.*\n,,' $(git grep -l -F '+build') Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Andrew Dunham	95f3dd1346	net/interfaces: don't dereference null pointer if no destination/netmask ... Fixes #6065 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I7159b8cbb8d5f47c0668cf83e59167f182f1defd	2 years ago
Andrew Dunham	ba459aeef5	net/interfaces: don't call GetList in List.ForeachInterface ... It looks like this was left by mistake in 4a3e2842. Change-Id: Ie4e3d5842548cd2e8533b3552298fb1ce9ba761a Signed-off-by: Andrew Dunham <andrew@tailscale.com>	2 years ago
Anton Tolchanov	d499afac78	net/interfaces: improve default route detection ... Instead of treating any interface with a non-ifscope route as a potential default gateway, now verify that a given route is actually a default route (0.0.0.0/0 or ::/0). Fixes #5879 Signed-off-by: Anton Tolchanov <anton@tailscale.com>	2 years ago
Anton Tolchanov	9c2ad7086c	net/interfaces: deduplicate route table parsing on Darwin and FreeBSD ... Signed-off-by: Anton Tolchanov <anton@tailscale.com>	2 years ago
Josh Soref	d4811f11a0	all: fix spelling mistakes ... Signed-off-by: Josh Soref <2119212+jsoref@users.noreply.github.com>	2 years ago
Eng Zer Jun	f0347e841f	refactor: move from io/ioutil to io and os packages ... The io/ioutil package has been deprecated as of Go 1.16 [1]. This commit replaces the existing io/ioutil functions with their new definitions in io and os packages. Reference: https://golang.org/doc/go1.16#ioutil Signed-off-by: Eng Zer Jun <engzerjun@gmail.com>	2 years ago
Brad Fitzpatrick	9bd9f37d29	go.mod: bump wireguard/windows, which moves to using net/netip ... Updates #5162 Change-Id: If99a3f0000bce0c01bdf44da1d513f236fd7cdf8 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	4950fe60bd	syncs, all: move to using Go's new atomic types instead of ours ... Fixes #5185 Change-Id: I850dd532559af78c3895e2924f8237ccc328449d Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
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
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
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	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
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
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
Brad Fitzpatrick	04c2c5bd80	net/interfaces: define DefaultRouteInterface and State.DefaultRouteInterface ... It was pretty ill-defined before and mostly for logging. But I wanted to start depending on it, so define what it is and make Windows match the other operating systems, without losing the log output we had before. (and add tests for that) Change-Id: I0fbbba1cfc67a265d09dd6cb738b73f0f6005247 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Josh Bleecher Snyder	ad5e04249b	wgengine/monitor: ignore adding/removing uninteresting IPs ... One of the most common "unexpected" log lines is: "network state changed, but stringification didn't" One way that this can occur is if an interesting interface (non-Tailscale, has interesting IP address) gains or loses an uninteresting IP address (link local or loopback). The fact that the interface is interesting is enough for EqualFiltered to inspect it. The fact that an IP address changed is enough for EqualFiltered to declare that the interfaces are not equal. But the State.String method reasonably declines to print any uninteresting IP addresses. As a result, the network state appears to have changed, but the stringification did not. The String method is correct; nothing interesting happened. This change fixes this by adding an IP address filter to EqualFiltered in addition to the interface filter. This lets the network monitor ignore the addition/removal of uninteresting IP addresses. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Maisem Ali	eccc2ac6ee	net/interfaces/windows: update Tailscale interface detection logic to ... account for new wintun naming. Signed-off-by: Maisem Ali <maisem@tailscale.com>	3 years ago
Brad Fitzpatrick	8efc306e4f	net/interfaces: assume the network's up on js/wasm ... Updates #3157 Change-Id: If4acd33598ad5e8ef7fb5960964c9ac32bc8f68b Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	4a3e2842d9	net/interfaces: add List, GetList ... And start moving funcs to methods on List. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	2501a694cb	net/interfaces: add RegisterInterfaceGetter for Android ... Updates #2293 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	12dc7c2df8	net/interfaces: remove stray C header file ... I meant to delete it as part of 974be2ec5c when the darwin code was ported from C to Go. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	3606e68721	net/interfaces: fix default route lookup on Windows ... It wasn't using the right metric. Apparently you're supposed to sum the route metric and interface metric. Whoops. While here, optimize a few little things too, not that this code should be too hot. Fixes #2707 (at least; probably dups but I'm failing to find) Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Josh Bleecher Snyder	a5da4ed981	all: gofmt with Go 1.17 ... This adds "//go:build" lines and tidies up existing "// +build" lines. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Matt Layher	effee49e45	net/interfaces: explicitly check netaddr.IP.Is6 in isUsableV6 ... Signed-off-by: Matt Layher <mdlayher@gmail.com>	3 years ago
Matt Layher	3ff8a55fa7	net/tsaddr: remove IsULA, replace with netaddr.IP.IsPrivate ... Signed-off-by: Matt Layher <mdlayher@gmail.com>	3 years ago
Brad Fitzpatrick	aaf2df7ab1	net/{dnscache,interfaces}: use netaddr.IP.IsPrivate, delete copied code ... Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Denton Gentry	61622b18fa	net/interface: add AWS App Runner /proc/net/route test ... Signed-off-by: Denton Gentry <dgentry@tailscale.com>	3 years ago
Brad Fitzpatrick	440566c5d2	net/interfaces: trim getPACWindows whitespace before parsing URL ... Fixes #2357 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
David Crawshaw	d6f4b5f5cb	ipn, etc: use controlplane.tailscale.com ... Signed-off-by: David Crawshaw <crawshaw@tailscale.com>	3 years ago
Denton Gentry	ad288baaea	net/interfaces: use IPv4 link local if nothing better ... The only connectivity an AWS Lambda container has is an IPv4 link-local 169.254.x.x address using NAT: 12: vtarget_1@if11: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000 link/ether 7e:1c:3f:00:00:00 brd ff:ff:ff:ff:ff:ff link-netnsid 1 inet 169.254.79.1/32 scope global vtarget_1 valid_lft forever preferred_lft forever If there are no other IPv4/v6 addresses available, and we are running in AWS Lambda, allow IPv4 169.254.x.x addresses to be used. ---- Similarly, a Google Cloud Run container's only connectivity is a Unique Local Address fddf:3978:feb1:d745::c001/128. If there are no other addresses available then allow IPv6 Unique Local Addresses to be used. We actually did this in an earlier release, but now refactor it to work the same way as the IPv4 link-local support is being done. Signed-off-by: Denton Gentry <dgentry@tailscale.com>	3 years ago