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wgengine/monitor: on linux, also monitor for IPv6 changes. 

Signed-off-by: David Anderson <danderson@tailscale.com>
pull/1386/head
David Anderson 2021-02-22 19:38:07 -08:00
parent b83c273737
commit df5adb2e23
1 changed files with 5 additions and 6 deletions
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11
wgengine/monitor/monitor_linux.go
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@ -39,12 +39,11 @@ type nlConn struct {
func newOSMon(logf logger.Logf) (osMon, error) { func newOSMon(logf logger.Logf) (osMon, error) {
conn, err := netlink.Dial(unix.NETLINK_ROUTE, &netlink.Config{ conn, err := netlink.Dial(unix.NETLINK_ROUTE, &netlink.Config{
// IPv4 address and route changes. Routes get us most of the // Routes get us most of the events of interest, but we need
// events of interest, but we need address as well to cover // address as well to cover things like DHCP deciding to give
// things like DHCP deciding to give us a new address upon // us a new address upon renewal - routing wouldn't change,
// renewal - routing wouldn't change, but all reachability // but all reachability would.
// would. Groups: unix.RTMGRP_IPV4_IFADDR | unix.RTMGRP_IPV6_IFADDR | unix.RTMGRP_IPV4_ROUTE | unix.RTMGRP_IPV6_ROUTE,
Groups: unix.RTMGRP_IPV4_IFADDR | unix.RTMGRP_IPV4_ROUTE,
}) })
if err != nil { if err != nil {
return nil, fmt.Errorf("dialing netlink socket: %v", err) return nil, fmt.Errorf("dialing netlink socket: %v", err)