1 #ifndef HEADER_CURL_DOH_H
2 #define HEADER_CURL_DOH_H
3 /***************************************************************************
5 * Project ___| | | | _ \| |
7 * | (__| |_| | _ <| |___
8 * \___|\___/|_| \_\_____|
10 * Copyright (C) 2018 - 2022, Daniel Stenberg, <daniel@haxx.se>, et al.
12 * This software is licensed as described in the file COPYING, which
13 * you should have received as part of this distribution. The terms
14 * are also available at https://curl.se/docs/copyright.html.
16 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
17 * copies of the Software, and permit persons to whom the Software is
18 * furnished to do so, under the terms of the COPYING file.
20 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
21 * KIND, either express or implied.
23 * SPDX-License-Identifier: curl
25 ***************************************************************************/
28 #include "curl_addrinfo.h"
30 #ifndef CURL_DISABLE_DOH
34 DOH_DNS_BAD_LABEL, /* 1 */
35 DOH_DNS_OUT_OF_RANGE, /* 2 */
36 DOH_DNS_LABEL_LOOP, /* 3 */
37 DOH_TOO_SMALL_BUFFER, /* 4 */
38 DOH_OUT_OF_MEM, /* 5 */
39 DOH_DNS_RDATA_LEN, /* 6 */
40 DOH_DNS_MALFORMAT, /* 7 */
41 DOH_DNS_BAD_RCODE, /* 8 - no such name */
42 DOH_DNS_UNEXPECTED_TYPE, /* 9 */
43 DOH_DNS_UNEXPECTED_CLASS, /* 10 */
44 DOH_NO_CONTENT, /* 11 */
45 DOH_DNS_BAD_ID, /* 12 */
46 DOH_DNS_NAME_TOO_LONG /* 13 */
54 DNS_TYPE_DNAME = 39 /* RFC6672 */
57 /* one of these for each DoH request */
61 unsigned char dohbuffer[512];
63 struct dynbuf serverdoh;
67 struct curl_slist *headers;
68 struct dnsprobe probe[DOH_PROBE_SLOTS];
69 unsigned int pending; /* still outstanding requests */
75 * Curl_doh() resolve a name using DoH (DNS-over-HTTPS). It resolves a name
76 * and returns a 'Curl_addrinfo *' with the address information.
79 struct Curl_addrinfo *Curl_doh(struct Curl_easy *data,
84 CURLcode Curl_doh_is_resolved(struct Curl_easy *data,
85 struct Curl_dns_entry **dns);
87 int Curl_doh_getsock(struct connectdata *conn, curl_socket_t *socks);
89 #define DOH_MAX_ADDR 24
90 #define DOH_MAX_CNAME 4
95 unsigned char v4[4]; /* network byte order */
101 struct dynbuf cname[DOH_MAX_CNAME];
102 struct dohaddr addr[DOH_MAX_ADDR];
110 DOHcode doh_encode(const char *host,
112 unsigned char *dnsp, /* buffer */
113 size_t len, /* buffer size */
114 size_t *olen); /* output length */
115 DOHcode doh_decode(const unsigned char *doh,
119 void de_init(struct dohentry *d);
120 void de_cleanup(struct dohentry *d);
123 #else /* if DoH is disabled */
124 #define Curl_doh(a,b,c,d) NULL
125 #define Curl_doh_is_resolved(x,y) CURLE_COULDNT_RESOLVE_HOST
128 #endif /* HEADER_CURL_DOH_H */