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net/dnscache: work on IPv6-only hosts (again)

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This fixes the regression where we had stopped working on IPv6-only
hosts.

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
This commit is contained in:
Brad Fitzpatrick
2021-01-06 19:50:19 -08:00
parent 560da4884f
commit 66be052a70
2 changed files with 68 additions and 34 deletions
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2
derp/derphttp/derphttp_client.go
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@@ -358,7 +358,7 @@ func (c *Client) dialURL(ctx context.Context) (net.Conn, error) {
dialer := netns.NewDialer()
if c.DNSCache != nil {
ip, err := c.DNSCache.LookupIP(ctx, host)
ip, _, err := c.DNSCache.LookupIP(ctx, host)
if err == nil {
hostOrIP = ip.String()
}