91 Commits (f0347e841f8edc8b3b08f1c00f1eef6625beec2d)

Author	SHA1	Message	Date
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	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	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
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>	2 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>	2 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>	2 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>	2 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>	2 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>	2 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	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
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
Brad Fitzpatrick	14f9c75293	wgengine/router: ignore Linux ip route error adding dup route ... Updates #3060 Updates #391 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
nicksherron	f01ff18b6f	all: fix spelling mistakes ... Signed-off-by: nicksherron <nsherron90@gmail.com>	3 years ago
Maisem Ali	5c383bdf5d	wgengine/router: pass in AmbientCaps when calling `ip rule` ... Signed-off-by: Maisem Ali <maisem@tailscale.com>	3 years ago
Brad Fitzpatrick	e4fecfe31d	wgengine/{monitor,router}: restore Linux ip rules when systemd deletes them ... Thanks. Fixes #1591 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	ed8587f90d	wgengine/router: take a link monitor ... Prep for #1591 which will need to make Linux's router react to changes that the link monitor observes. The router package already depended on the monitor package transitively. Now it's explicit. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Josh Bleecher Snyder	1ece91cede	go.mod: upgrade wireguard-windows, de-fork wireguard-go ... Pull in the latest version of wireguard-windows. Switch to upstream wireguard-go. This requires reverting all of our import paths. Unfortunately, this has to happen at the same time. The wireguard-go change is very low risk, as that commit matches our fork almost exactly. (The only changes are import paths, CI files, and a go.mod entry.) So if there are issues as a result of this commit, the first place to look is wireguard-windows changes. Signed-off-by: Josh Bleecher Snyder <josh@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>	3 years ago
Maisem Ali	1b9d8771dc	ipn/ipnlocal,wgengine/router,cmd/tailscale: add flag to allow local lan access when routing traffic via an exit node. ... For #1527 Signed-off-by: Maisem Ali <maisem@tailscale.com>	3 years ago
David Anderson	4c61ebacf4	wgengine: move DNS configuration out of wgengine/router. ... Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Anderson	fcfc0d3a08	net/dns: remove ManagerConfig, pass relevant args directly. ... Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Anderson	0a84aaca0a	wgengine/router: remove unused wireguard *Device argument. ... Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Anderson	672731ac6f	many: gofmt. ... Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Anderson	9f7f2af008	wgengine/router/dns: move to net/dns. ... Preparation for merging the APIs and whatnot. Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
Brad Fitzpatrick	2d96215d97	wgengine/router: make Linux delRoute idempotent, cidrDiff fail late as possible ... This makes cidrDiff do as much as possible before failing, and makes a delete of an already-deleted rule be a no-op. We should never do this ourselves, but other things on the system can, and this should help us recover a bit. Also adds the start of root-requiring tests. TODO: hook into wgengine/monitor and notice when routes are changed behind our back, and invalidate our routes map and re-read from kernel (via the ip command) at least on the next reconfig call. Updates tailscale/corp#1338 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	96a488e37e	wgengine/router: simplify func normalizeCIDR using netaddr method	3 years ago
Brad Fitzpatrick	d76334d2f0	ipn: split LocalBackend off into new ipn/ipnlocal package ... And move a couple other types down into leafier packages. Now cmd/tailscale doesn't bring in netlink, magicsock, wgengine, etc. Fixes #1181 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	a2aa6cd2ed	wgengine/router: clarify disabled IPv6 message on Linux	3 years ago
David Anderson	267531e4f8	wgengine/router: probe better for v6 policy routing support. ... Previously we disabled v6 support if the disable_policy knob was missing in /proc, but some kernels support policy routing without exposing the toggle. So instead, treat disable_policy absence as a "maybe", and make the direct `ip -6 rule` probing a bit more elaborate to compensate. Fixes #1241. Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
Brad Fitzpatrick	c7fc4a06da	wgengine/router: don't configure IPv6 on Linux when IPv6 is unavailable ... Fixes #1214 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	0d94fe5f69	wgengine/router: disable IPv6 on Linux if ip rule -6 fails (#1074) ... Updates #562 Fixes #973 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
David Anderson	a664aac877	wgengine/router: disable IPv6 if v6 policy routing is unavailable. ... Fixes #895. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	ff0cf6340a	wgengine/router: fix configuration of loopback netfilter rules for v6. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	c493e5804f	wgengine/router: make v6-ness configurable in test, for consistent results. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago