tailscale

Commit Graph

Author	SHA1	Message	Date
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
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
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
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
Josh Soref	d4811f11a0	all: fix spelling mistakes Signed-off-by: Josh Soref <2119212+jsoref@users.noreply.github.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	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	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	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
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
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
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
Brad Fitzpatrick	1ae35b6c59	net/{interfaces,netcheck}: rename some fields, funcs Split out of Denton's #2164, to make that diff smaller to review. This change has no behavior changes. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Josh Bleecher Snyder	25df067dd0	all: adapt to opaque netaddr types This commit is a mishmash of automated edits using gofmt: gofmt -r 'netaddr.IPPort{IP: a, Port: b} -> netaddr.IPPortFrom(a, b)' -w . gofmt -r 'netaddr.IPPrefix{IP: a, Port: b} -> netaddr.IPPrefixFrom(a, b)' -w . gofmt -r 'a.IP.Is4 -> a.IP().Is4' -w . gofmt -r 'a.IP.As16 -> a.IP().As16' -w . gofmt -r 'a.IP.Is6 -> a.IP().Is6' -w . gofmt -r 'a.IP.As4 -> a.IP().As4' -w . gofmt -r 'a.IP.String -> a.IP().String' -w . And regexps: \w(.)\.Port = (.) -> $1 = $1.WithPort($2) \w(.)\.IP = (.) -> $1 = $1.WithIP($2) And lots of manual fixups. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
David Anderson	72b6d98298	net/interfaces: return all Tailscale addresses from Tailscale(). Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
Denton Gentry	54ba6194f7	interfaces: allow IPv6 ULA as a valid address. IPv6 Unique Local Addresses are sometimes used with Network Prefix Translation to reach the Internet. In that respect their use is similar to the private IPv4 address ranges 10/8, 172.16/12, and 192.168/16. Treat them as sufficient for AnyInterfaceUp(), but specifically exclude Tailscale's own IPv6 ULA prefix to avoid mistakenly trying to bootstrap Tailscale using Tailscale. This helps in supporting Google Cloud Run, where the addresses are 169.254.8.1/32 and fddf:3978:feb1:d745::c001/128 on eth1. Signed-off-by: Denton Gentry <dgentry@tailscale.com>	4 years ago
Brad Fitzpatrick	7f174e84e6	net/interfaces: remove mutating methods, add EqualFiltered instead Now callers (wgengine/monitor) don't need to mutate the state to remove boring interfaces before calling State.Equal. Instead, the methods to remove boring interfaces from the State are removed, as is the reflect-using Equal method itself, and in their place is a new EqualFiltered method that takes a func predicate to match interfaces to compare. And then the FilterInteresting predicate is added for use with EqualFiltered to do the job that that wgengine/monitor previously wanted. Now wgengine/monitor can keep the full interface state around, including the "boring" interfaces, which we'll need for peerapi on macOS/iOS to bind to the interface index of the utunN device. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	7dc88e4c1e	net/interfaces: track more interface metadata in State We have it already but threw it away. But macOS/iOS code will be needing the interface index, so hang on to it. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	d5fd373f09	net/interfaces: skip IPv6 link-local interfaces like we do for IPv4 We strip them control-side anyway, and we already strip IPv4 link local, so there's no point uploading them. And iOS has a ton of them, which results in somewhat silly amount of traffic in the MapRequest. We'll be doing same-LAN-inter-tailscaled link-local traffic a different way, with same-LAN discovery. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	fee74e7ea7	net/interfaces, wgengine/monitor: fix false positives link changes interfaces.State.String tries to print a concise summary of the network state, removing any interfaces that don't have any or any interesting IP addresses. On macOS and iOS, for instance, there are a ton of misc things. But the link monitor based its are-there-changes decision on interfaces.State.Equal, which just used reflect.DeepEqual, including comparing all the boring interfaces. On macOS, when turning wifi on or off, there are a ton of misc boring interface changes, resulting in hitting an earlier check I'd added on suspicion this was happening: [unexpected] network state changed, but stringification didn't This fixes that by instead adding a new interfaces.State.RemoveUninterestingInterfacesAndAddresses method that does, uh, that. Then use that in the monitor. So then when Equal is used later, it's DeepEqualing the already-cleaned version with only interesting interfaces. This makes cmd/tailscaled debug --monitor much less noisy. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	829eb8363a	net/interfaces: sort returned addresses from LocalAddresses Also change the type to netaddr.IP while here, because it made sorting easier. Updates tailscale/corp#1397 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
David Anderson	f647e3daaf	ipn/ipnlocal: transform default routes into "all but LAN" routes. Fixes #1177. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
Brad Fitzpatrick	000b80de9d	net/interfaces: go idle on macOS when wifi/etc is down, ignore utun* interfaces Updates tailscale/corp#1289 Updates tailscale/corp#1367 Updates tailscale/corp#1378 Updates tailscale/felicity#4	4 years ago
Brad Fitzpatrick	20e66c5b92	net/interfaces: reconcile interface filtering with address printing in logs The interface.State logging tried to only log interfaces which had interesting IPs, but the what-is-interesting checks differed between the code that gathered the interface names to print and the printing of their addresses.	4 years ago
Brad Fitzpatrick	35e10c78fc	net/interfaces: don't send over zt* interfaces Fixes #1208 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
David Anderson	692a011b54	net/interfaces: remove IsTailscaleIP, make callers use tsaddr. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	baa7937998	net/interfaces: return IPv6 addresses from LocalAddresses. In practice, we already provide IPv6 endpoint addresses via netcheck, and that address is likely to match a local address anyway (i.e. no NAT66). The comment at that piece of the code mentions needing to figure out a good priority ordering, but that only applies to non-active-discovery clients, who already don't do anything with IPv6 addresses. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
Brad Fitzpatrick	6ee219a25d	ipn, wgengine, magicsock, tsdns: be quieter and less aggressive when offline If no interfaces are up, calm down and stop spamming so much. It was noticed as especially bad on Windows, but probably was bad everywhere. I just have the best network conditions testing on a Windows VM. Updates #604	4 years ago
Brad Fitzpatrick	587bdc4280	ipn, wgengine: disable subnet routes if network has PAC configuration Not configurable yet. Updates tailscale/corp#653 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	ed5d5f920f	net/interfaces: add interfaces.State.String method	4 years ago
Brad Fitzpatrick	8051ecff55	net/interfaces: add State.PAC field, populate it on Windows Not used for anything yet (except logging), but populate the current proxy autoconfig PAC URL in Interfaces.State. A future change will do things based on it.	4 years ago
Brad Fitzpatrick	c5eb57f4d6	net/tshttpproxy: new package, support WPAD/PAC proxies on Windows Updates tailscale/corp#553 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	dbb4c246fa	wgengine/monitor: add Windows linkchange monitor Updates tailscale/corp#553 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	b97aac1718	net/interfaces: include DefaultRouteInterface in interfaces.State And log it in wgengine on change. Changing bug in #643. Updates #643	4 years ago
Brad Fitzpatrick	742b8b44a8	net/tsaddr: new package to hold Tailscale-specific IPs/ranges And update existing callers with (near) duplicated cases.	4 years ago
Brad Fitzpatrick	5c6d8e3053	netcheck, tailcfg, interfaces, magicsock: survey UPnP, NAT-PMP, PCP Don't do anything with UPnP, NAT-PMP, PCP yet, but see how common they are in the wild. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago

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56 Commits (840d69e1ebfc39c6a58ae38a7bf4aae321e7720a)