Function AddPrefix

proxyutil/dns.go:13–19

AddPrefix adds a 2-byte prefix with the DNS message length.

(b []byte)

// AddPrefix adds a 2-byte prefix with the DNS message length.
func AddPrefix(b []byte) (m []byte) {
	m = make([]byte, 2+len(b))
	binary.BigEndian.PutUint16(m, uint16(len(b)))
	copy(m[2:], b)

	return m
}

// IPFromRR returns the IP address from rr if any.
func IPFromRR(rr dns.RR) (ip netip.Addr) {