213 Commits (c573bef0aa088d519f6fd4cde10f2b42fa221c39)

Author	SHA1	Message	Date
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>	2 years ago
James Tucker	7b73c9628d	version/distro,wgengine/router: raise WSL eth0 MTU when too low ... WSL has started to set the eth0 default route interface default to 1280 MTU, which is too low to carry 1280 byte packets from tailscale0 once wrapped in WireGuard. The change down to 1280 is very likely smaller than necessary for almost all users. We can not easily determine the ideal MTU, but if all the preconditions match, we raise the MTU to 1360, which is just enough for Tailscale traffic to work. Updates #4833 Updates #7346 Signed-off-by: James Tucker <james@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
Andrew Dunham	b63094431b	wgengine/router: fix tests on systems with older Busybox 'ip' binary ... Adjust the expected system output by removing the unsupported mask component including and after the slash in expected output like: fwmask 0xabc/0xdef This package's tests now pass in an Alpine container when the 'go' and 'iptables' packages are installed (and run as privileged so /dev/net/tun exists). Fixes #5928 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: Id1a3896282bfa36b64afaec7a47205e63ad88542	2 years ago
Aaron Klotz	033bd94d4c	cmd/tailscaled, wgengine/router: use wingoes/com for COM initialization instead of go-ole ... This patch removes the crappy, half-backed COM initialization used by `go-ole` and replaces that with the `StartRuntime` function from `wingoes`, a library I have started which, among other things, initializes COM properly. In particular, we should always be initializing COM to use the multithreaded apartment. Every single OS thread in the process becomes implicitly initialized as part of the MTA, so we do not need to concern ourselves as to whether or not any particular OS thread has initialized COM. Furthermore, we no longer need to lock the OS thread when calling methods on COM interfaces. Single-threaded apartments are designed solely for working with Win32 threads that have a message pump; any other use of the STA is invalid. Fixes https://github.com/tailscale/tailscale/issues/3137 Signed-off-by: Aaron Klotz <aaron@tailscale.com>	2 years ago
Brad Fitzpatrick	3f8e185003	health: add Warnable, move ownership of warnable items to callers ... The health package was turning into a rando dumping ground. Make a new Warnable type instead that callers can request an instance of, and then Set it locally in their code without the health package being aware of all the things that are warnable. (For plenty of things the health package will want to know details of how Tailscale works so it can better prioritize/suppress errors, but lots of the warnings are pretty leaf-y and unrelated) This just moves two of the health warnings. Can probably move more later. Change-Id: I51e50e46eb633f4e96ced503d3b18a1891de1452 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Maisem Ali	d585cbf02a	wgengine/router: [bsd/darwin] remove and readd routes on profile change ... Noticed when testing FUS on tailscale-on-macOS, that routing would break completely when switching between profiles. However, it would start working again when going back to the original profile tailscaled started with. Turns out that if we change the addrs on the interface we need to remove and readd all the routes. Updates #713 Signed-off-by: Maisem Ali <maisem@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
Maisem Ali	74637f2c15	wgengine/router: [linux] add before deleting interface addrs ... Deleting may temporarily result in no addrs on the interface, which results in all other rules (like routes) to get dropped by the OS. I verified this fixes the problem. Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 years ago
James Tucker	4ec6d41682	wgengine/router: fix MTU configuration on Windows ... Always set the MTU to the Tailscale default MTU. In practice we are missing applying an MTU for IPv6 on Windows prior to this patch. This is the simplest patch to fix the problem, the code in here needs some more refactoring. Fixes #5914 Signed-off-by: James Tucker <james@tailscale.com>	2 years ago
Josh Soref	d4811f11a0	all: fix spelling mistakes ... Signed-off-by: Josh Soref <2119212+jsoref@users.noreply.github.com>	2 years ago
Tom DNetto	ab591906c8	wgengine/router: Increase range of rule priorities when detecting mwan3 ... Context: https://github.com/tailscale/tailscale/pull/5588#issuecomment-1260655929 It seems that if the interface at index 1 is down, the rule is not installed. As such, we increase the range we detect up to 2004 in the hope that at least one of the interfaces 1-4 will be up. Signed-off-by: Tom DNetto <tom@tailscale.com>	2 years ago
Eng Zer Jun	f0347e841f	refactor: move from io/ioutil to io and os packages ... The io/ioutil package has been deprecated as of Go 1.16 [1]. This commit replaces the existing io/ioutil functions with their new definitions in io and os packages. Reference: https://golang.org/doc/go1.16#ioutil Signed-off-by: Eng Zer Jun <engzerjun@gmail.com>	2 years ago
Brad Fitzpatrick	74674b110d	envknob: support changing envknobs post-init ... Updates #5114 Change-Id: Ia423fc7486e1b3f3180a26308278be0086fae49b Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Tom DNetto	f6da2220d3	wgengine: set fwmark masks in netfilter & ip rules ... This change masks the bitspace used when setting and querying the fwmark on packets. This allows tailscaled to play nicer with other networking software on the host, assuming the other networking software is also using fwmarks & a different mask. IPTables / mark module has always supported masks, so this is safe on the netfilter front. However, busybox only gained support for parsing + setting masks in 1.33.0, so we make sure we arent such a version before we add the "/<mask>" syntax to an ip rule command. Signed-off-by: Tom DNetto <tom@tailscale.com>	2 years ago
Tom DNetto	ed2b8b3e1d	wgengine/router: reduce routing rule priority for openWRT + mwan3 ... Fixes #3659 Signed-off-by: Tom DNetto <tom@tailscale.com> Co-authored-by: Ian Foster <ian@vorsk.com>	2 years ago
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	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
Brad Fitzpatrick	469c30c33b	ipn/localapi: define a cert dir for Synology DSM6 ... Fixes #4060 Change-Id: I5f145d4f56f6edb14825268e858d419c55918673 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Mihai Parparita	06aa141632	wgengine/router: avoid unncessary routing configuration changes ... The iOS and macOS networking extension API only exposes a single setter for the entire routing and DNS configuration, and does not appear to do any kind of diffing or deltas when applying changes. This results in spurious "network changed" errors in Chrome, even when the `OneCGNATRoute` flag from df9ce972c7 is used (because we're setting the same configuration repeatedly). Since we already keep track of the current routing and DNS configuration in CallbackRouter, use that to detect if they're actually changing, and only invoke the platform setter if it's actually necessary. Updates #3102 Signed-off-by: Mihai Parparita <mihai@tailscale.com>	2 years ago
James Tucker	76256d22d8	wgengine/router: windows: set SkipAsSource on IPv6 LL addresses ... Link-local addresses on the Tailscale interface are not routable. Ideally they would be removed, however, a concern exists that the operating system will attempt to re-add them which would lead to thrashing. Setting SkipAsSource attempts to avoid production of packets using the address as a source in any default behaviors. Before, in powershell: `ping (hostname)` would ping the link-local address of the Tailscale interface, and fail. After: `ping (hostname)` now pings the link-local address on the next highest priority metric local interface. Fixes #4647 Signed-off-by: James Tucker <james@tailscale.com>	2 years ago
Tom	2903d42921	wgengine/router: delete hardcoded link-local address on Windows (#4740) ... Fixes #4647 It seems that Windows creates a link-local address for the TUN driver, seemingly based on the (fixed) adapter GUID. This results in a fixed MAC address, which for some reason doesn't handle loopback correctly. Given the derived link-local address is preferred for lookups (thanks LLMNR), traffic which addresses the current node by hostname uses this broken address and never works. To address this, we remove the broken link-local address from the wintun adapter. Signed-off-by: Tom DNetto <tom@tailscale.com>	2 years ago
Brad Fitzpatrick	53588f632d	Revert "wgengine/router,util/kmod: load & log xt_mark" ... This reverts commit 8d6793fd70. Reason: breaks Android build (cgo/pthreads addition) We can try again next cycle. Change-Id: I5e7e1730a8bf399a8acfce546a6d22e11fb835d5 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
James Tucker	8d6793fd70	wgengine/router,util/kmod: load & log xt_mark ... Attempt to load the xt_mark kernel module when it is not present. If the load fails, log error information. It may be tempting to promote this failure to an error once it has been in use for some time, so as to avoid reaching an error with the iptables invocation, however, there are conditions under which the two stages may disagree - this change adds more useful breadcrumbs. Example new output from tailscaled running under my WSL2: ``` router: ensure module xt_mark: "/usr/sbin/modprobe xt_mark" failed: exit status 1; modprobe: FATAL: Module xt_mark not found in directory /lib/modules/5.10.43.3-microsoft-standard-WSL2 ``` Background: There are two places to lookup modules, one is `/proc/modules` "old", the other is `/sys/module/` "new". There was query_modules(2) in linux <2.6, alas, it is gone. In a docker container in the default configuration, you would get /proc/modules and /sys/module/ both populated. lsmod may work file, modprobe will fail with EPERM at `finit_module()` for an unpriviliged container. In a priviliged container the load may *succeed*, if some conditions are met. This condition should be avoided, but the code landing in this change does not attempt to avoid this scenario as it is both difficult to detect, and has a very uncertain impact. In an nspawn container `/proc/modules` is populated, but `/sys/module` does not exist. Modern `lsmod` versions will fail to gather most module information, without sysfs being populated with module information. In WSL2 modules are likely missing, as the in-use kernel typically is not provided by the distribution filesystem, and WSL does not mount in a module filesystem of its own. Notably the WSL2 kernel supports iptables marks without listing the xt_mark module in /sys/module, and /proc/modules is empty. On a recent kernel, we can ask the capabilities system about SYS_MODULE, that will help to disambiguate between the non-privileged container case and just being root. On older kernels these calls may fail. Update #4329 Signed-off-by: James Tucker <james@tailscale.com>	3 years ago
Brad Fitzpatrick	0ce67ccda6	wgengine/router: make supportsV6NAT check catch more cases ... Updates #4459 Change-Id: Ic27621569d2739298e652769d10e38608c6012be Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
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	26f27a620a	wgengine/router: delete legacy netfilter rule cleanup [Linux] ... This was just cleanup for an ancient version of Tailscale. Any such machines have upgraded since then. Change-Id: Iadcde05b37c2b867f92e02ec5d2b18bf2b8f653a Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	41fd4eab5c	envknob: add new package for all the strconv.ParseBool(os.Getenv(..)) ... A new package can also later record/report which knobs are checked and set. It also makes the code cleaner & easier to grep for env knobs. Change-Id: Id8a123ab7539f1fadbd27e0cbeac79c2e4f09751 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Maisem Ali	d24a8f7b5a	wgengine/router{windows}: return the output from the firewallTweaker ... on error. While debugging a customer issue where the firewallTweaker was failing the only message we have is `router: firewall: error adding Tailscale-Process rule: exit status 1` which is not really helpful. This will help diagnose firewall tweaking failures. Signed-off-by: Maisem Ali <maisem@tailscale.com>	3 years ago
Denton Gentry	878a20df29	net/dns: add GetBaseConfig to CallbackRouter. ... Allow users of CallbackRouter to supply a GetBaseConfig implementation. This is expected to be used on Android, which currently lacks both a) platform support for Split-DNS and b) a way to retrieve the current DNS servers. iOS/macOS also use the CallbackRouter but have platform support for SplitDNS, so don't need getBaseConfig. Updates https://github.com/tailscale/tailscale/issues/2116 Updates https://github.com/tailscale/tailscale/issues/988 Signed-off-by: Denton Gentry <dgentry@tailscale.com>	3 years ago
Brad Fitzpatrick	e8db43e8fa	wgengine/router: demote TestDebugListRules fail to skip ... Updates #3360 Change-Id: Ic5c98ea03f3171c13ab9293a0ae74d17fd04d149 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	946dfec98a	wgengine/router: fix checkIPRuleSupportsV6 to actually use IPv6 ... Updates #3358 (should fix it) Updates #391 Change-Id: Ia62437dfa81247b0b5994d554cf279c3d540e4e7 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	9259377a7f	wgengine/router: don't assume Linux was built with IP_MULTIPLE_TABLES ... Updates #3351 Updates #391 Change-Id: I7e66b686e05f3c970846513679cc62556ebe322a Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	0350cf0438	wgengine{,/router}: annotate some more errors ... Updates #3351 Change-Id: I8b4f957d2051b3e29401bb449dbadbdada3a7c46 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	d24ed3f68e	wgengine/router: add debug knob to resort to Linux "ip" command usage ... Tailscale 1.18 uses netlink instead of the "ip" command to program the Linux kernel. The old way was kept primarily for tests, but this also adds a TS_DEBUG_USE_IP_COMMAND environment knob to force the old way temporarily for debugging anybody who might have problems with the new way in 1.18. Updates #391 Change-Id: I0236fbfda6c9c05dcb3554fcc27ec0c86456efd9 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Josh Bleecher Snyder	3fd5f4380f	util/multierr: new package ... github.com/go-multierror/multierror served us well. But we need a few feature from it (implement Is), and it's not worth maintaining a fork of such a small module. Instead, I did a clean room implementation inspired by its API. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Brad Fitzpatrick	408b0923a6	wgengine/router: remove last non-test "ip" command usage on Linux ... Updates #391 Change-Id: Ic2c3f8460b1e4b8d34b936a1725705fcc1effbae Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	ff1954cfd9	wgengine/router: use netlink for ip rules on Linux ... Using temporary netlink fork in github.com/tailscale/netlink until we get the necessary changes upstream in either vishvananda/netlink or jsimonetti/rtnetlink. Updates #391 Change-Id: I6e1de96cf0750ccba53dabff670aca0c56dffb7c Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	19189d7018	wgengine/router: add a addrFamily type [linux] ... In prep for more netlink-ification. Change-Id: I7c34a04001988107dc2583597aa4f26ddb887e91	3 years ago
Brad Fitzpatrick	7c40a5d440	wgengine/router: refactor in prep for Linux netlink-ification ... Pull out the list of policy routing rules to a data structure now shared between the add & delete paths, but to also be shared by the netlink paths in a future change. Updates #391 Change-Id: I119ab1c246f141d639006c808b61c585c3d67924 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	aad46bd9ff	wgengine/router: stop cleaning up old dev rules on Linux ... Anybody using that one old, unreleased version of Tailscale from over a year ago should've rebooted their machine by now to get various non-Tailscale security updates. :) Change-Id: If9e043cb008b20fcd6ddfd03756b3b23a9d7aeb5 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	d36c0d3566	wgengine/router: add debug test to enumerate rules ... No non-test changes. Updates #391 Change-Id: Ia88610c08e07a119d002e58250463cb4659b9f54 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	dc2fbf5877	wgengine/router: start using netlink instead of 'ip' on Linux ... Converts up, down, add/del addresses, add/del routes. Not yet done: rules. Updates #391 Change-Id: I02554ca07046d18f838e04a626ba99bbd35266fb Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	9310713bfb	all: fix some js/wasm compilation issues ... Change-Id: I05a3a4835e225a1e413ec3540a7c7e4a2d477084 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Maisem Ali	53199738fb	wgengine: don't try to delete legacy netfilter rules on synology. ... Signed-off-by: Maisem Ali <maisem@tailscale.com>	3 years ago
Maisem Ali	27799a1a96	wgengine: only use AmbientCaps on DSM7+ ... Signed-off-by: Maisem Ali <maisem@tailscale.com>	3 years ago