Function firstIP

proxy/proxy_internal_test.go:178–189

firstIP returns the first IP address from the DNS response.

(resp *dns.Msg)

// firstIP returns the first IP address from the DNS response.
func firstIP(resp *dns.Msg) (ip net.IP) {
	for _, ans := range resp.Answer {
		a, ok := ans.(*dns.A)
		if !ok {
			continue
		}

		return a.A
	}

	return nil
}

type testUpstream struct {
	ans []dns.RR