Josh Bleecher Snyder 69cdc30c6d wgengine/wgcfg: remove Config.ListenPort ... We don't use the port that wireguard-go passes to us (via magicsock.connBind.Open). We ignore it entirely and use the port we selected. When we tell wireguard-go that we're changing the listen_port, it calls connBind.Close and then connBind.Open. And in the meantime, it stops calling the receive functions, which means that we stop receiving and processing UDP and DERP packets. And that is Very Bad. That was never a problem prior to b3ceca1dd7, because we passed the SkipBindUpdate flag to our wireguard-go fork, which told wireguard-go not to re-bind on listen_port changes. That commit eliminated the SkipBindUpdate flag. We could write a bunch of code to work around the gap. We could add background readers that process UDP and DERP packets when wireguard-go isn't. But it's simpler to never create the conditions in which wireguard-go rebinds. The other scenario in which wireguard-go re-binds is device.Down. Conveniently, we never call device.Down. We go from device.Up to device.Close, and the latter only when we're shutting down a magicsock.Conn completely. Rubber-ducked-by: Avery Pennarun <apenwarr@tailscale.com> Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>		2021-04-03 10:32:51 -07:00
..
filter	net/packet, wgengine/{filter,tstun}: add TSMP ping	2021-03-24 09:50:01 -07:00
magicsock	wgengine/wgcfg: remove Config.ListenPort	2021-04-03 10:32:51 -07:00
monitor	wgengine/monitor: Linux fall back to polling	2021-04-01 07:29:11 -07:00
netstack	wgengine/netstack: stop re-adding IPs registered by active TCP connections (#1629)	2021-03-31 15:32:33 -04:00
router	wgengine/router: add a CallbackRouter shim.	2021-04-02 18:43:24 -07:00
wgcfg	wgengine/wgcfg: remove Config.ListenPort	2021-04-03 10:32:51 -07:00
wglog	wgengine/wglog: drop 1/s "interface is up" messages.	2021-02-23 09:01:58 -08:00
winnet	wgengine/winnet: don't build on non-windows	2021-02-09 21:09:24 -08:00
pendopen.go	net/tstun: rename TUN to Wrapper.	2021-03-26 23:15:22 -07:00
userspace_test.go	wgengine: take in dns.Config, split out to resolver.Config and dns.OSConfig.	2021-04-02 00:59:44 -07:00
userspace.go	wgengine/...: split into multiple receive functions	2021-04-02 12:18:54 -07:00
watchdog_test.go	wgengine: extend TestWatchdog timeout on macOS	2021-03-27 09:27:11 -07:00
watchdog.go	wgengine: take in dns.Config, split out to resolver.Config and dns.OSConfig.	2021-04-02 00:59:44 -07:00
wgengine.go	wgengine: take in dns.Config, split out to resolver.Config and dns.OSConfig.	2021-04-02 00:59:44 -07:00