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22 Commits

Author SHA1 Message Date
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>
 2021-08-05 15:54:00 -07:00
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>
 2021-07-20 15:52:22 -07:00
Brad Fitzpatrick
e41193ec4d wgengine/monitor: don't spam about Linux RTM_NEWRULE events 
The earlier 2ba36c294b started listening
for ip rule changes and only cared about DELRULE events, buts its subscription
included all rule events, including new ones, which meant we were then
catching our own ip rule creations and logging about how they were unknown.

Stop that log spam.

Updates #1591

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
 2021-07-19 14:30:15 -07:00
Brad Fitzpatrick
2ba36c294b wgengine/monitor: subscribe to Linux ip rule events, log on rule deletes 
For debugging & working on #1591 where certain versions of systemd-networkd
delete Tailscale's ip rule entries.

Updates #1591

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
 2021-07-18 14:50:47 -07:00
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>
 2021-05-16 14:52:00 -07:00
Brad Fitzpatrick
d5d70ae9ea wgengine/monitor: reduce Linux log spam on down 
Fixes #1689

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
 2021-04-12 10:38:51 -07:00
Denton Gentry
35ab4020c7 wgengine/monitor: Linux fall back to polling 
Google Cloud Run does not implement NETLINK_ROUTE RTMGRP.
If initialization of the netlink socket or group membership
fails, fall back to a polling implementation.

Signed-off-by: Denton Gentry <dgentry@tailscale.com>
 2021-04-01 07:29:11 -07:00
Brad Fitzpatrick
7461dded88 wgengine/monitor: on unsupported platforms, use a polling implementation 
Not great, but lets people working on new ports get going more quickly
without having to do everything up front.

As the link monitor is getting used more, I felt bad having a useless
implementation.

Updates #815
Updates #1427

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
 2021-03-02 21:49:27 -08:00
David Anderson
6e42430ad8 wgengine/monitor: don't log any single-IP routes added to the tailscale table. 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-02-22 20:21:51 -08:00
David Anderson
df5adb2e23 wgengine/monitor: on linux, also monitor for IPv6 changes. 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-02-22 19:38:07 -08:00
Matt Layher
bfbd6b9241 go.mod: bump github.com/mdlayher/netlink to v1.2.0 
Signed-off-by: Matt Layher <mdlayher@gmail.com>
 2020-12-23 08:08:02 -08:00
Brad Fitzpatrick
b983e5340f wgengine/monitor: add, clean up netlink logging on route changes 
Updates #643
 2020-08-12 13:27:14 -07:00
Brad Fitzpatrick
43bc86588e wgengine/monitor: log RTM_DELROUTE details, fix format strings 
Updates #643
 2020-08-05 20:44:05 -07:00
Wendi Yu
c3736250a4
wgengine: fix macos staticcheck errors (#557) 
Signed-off-by: Wendi <wendi.yu@yahoo.ca>
 2020-07-14 17:28:02 -06:00
Brad Fitzpatrick
ce1b52bb71 wgengine/monitor: fix other potential crashes on Linux 
Never return "nil, nil" anymore. The caller expected a usable
interface now. I missed some of these earlier.

Also, handle address deletion now.

Updates #532
 2020-07-07 11:08:16 -07:00
Brad Fitzpatrick
4b75a27969 wgengine/monitor: fix crash on Linux on type 21 messages 
Fixes #532
 2020-07-07 10:45:25 -07:00
Brad Fitzpatrick
4db60a8436 wgengine/monitor: parse Linux netlink messages, ignore our own events 
Fixes tailscale/corp#412 ("flood of link change events at start-up")

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
 2020-07-06 22:42:01 -07:00
Elias Naur
2dac4f2b24 wgengine/monitor: disable monitor on Android 
Netlink is not supported on Android.

Signed-off-by: Elias Naur <mail@eliasnaur.com>
 2020-04-24 06:35:31 -07:00
Tobias Klauser
4d09316f9a wgengine/monitor: use RTMGRP_* consts from x/sys/unix 
Bump golang.org/x/sys/unix to get the RTMGRP_* consts and use them.

Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
 2020-02-17 14:15:08 -08:00
Brad Fitzpatrick
997678f540 wgengine/monitor: make Close not block forever on Linux 
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
 2020-02-17 11:39:33 -08:00
Brad Fitzpatrick
7f5e3febe5 wgengine: move link monitor to be owned by the engine, not the router 
And make the monitor package portable with no-op implementations on
unsupported operating systems.

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
 2020-02-17 09:53:17 -08:00
wardn
2cafbd74c7 monitor: refactor for architecture-specific connection implementations 
Signed-off-by: wardn <wardn@users.noreply.github.com>
 2020-02-13 09:46:17 -08:00