| 56 | } |
| 57 | |
| 58 | func (c *DOHClient) Exchange(m *dns.Msg) (*dns.Msg, error) { |
| 59 | b, err := m.Pack() |
| 60 | if err != nil { |
| 61 | return nil, err |
| 62 | } |
| 63 | hr, err := http.NewRequest("POST", c.DOH, bytes.NewReader(b)) |
| 64 | if err != nil { |
| 65 | return nil, err |
| 66 | } |
| 67 | hr.Header.Set("Accept", "application/dns-message") |
| 68 | hr.Header.Set("Content-Type", "application/dns-message") |
| 69 | res, err := c.Client.Do(hr) |
| 70 | if err != nil { |
| 71 | return nil, err |
| 72 | } |
| 73 | defer res.Body.Close() |
| 74 | b, err = io.ReadAll(res.Body) |
| 75 | if err != nil { |
| 76 | return nil, err |
| 77 | } |
| 78 | r := &dns.Msg{} |
| 79 | if err := r.Unpack(b); err != nil { |
| 80 | return nil, err |
| 81 | } |
| 82 | return r, nil |
| 83 | } |
| 84 | |
| 85 | // if no AAAA, return nil |
| 86 | func (c *DOHClient) AAAA(domain string) (net.IP, error) { |