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wgengine: don't try pinging IPv6 addresses in legacy pinger.

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Signed-off-by: David Anderson <danderson@tailscale.com>
This commit is contained in:
David Anderson 2020-12-01 20:09:20 -08:00
parent dfbde3d3aa
commit be6fe393c5
1 changed files with 7 additions and 0 deletions
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7
wgengine/userspace.go
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@ -515,6 +515,13 @@ func (p *pinger) run(ctx context.Context, peerKey wgcfg.Key, ips []wgcfg.IP, src
start := time.Now()
var dstIPs []packet.IP4
for _, ip := range ips {
if ip.Is6() {
// This code is only used for legacy (pre-discovery)
// peers. They're not going to work right with IPv6 on the
// overlay anyway, so don't bother trying to make ping
// work.
continue
}
dstIPs = append(dstIPs, packet.IP4FromNetaddr(netaddr.IPFrom16(ip.Addr)))
}