| 1 | #ifndef HEADER_CURL_DOH_H
|
|---|
| 2 | #define HEADER_CURL_DOH_H
|
|---|
| 3 | /***************************************************************************
|
|---|
| 4 | * _ _ ____ _
|
|---|
| 5 | * Project ___| | | | _ \| |
|
|---|
| 6 | * / __| | | | |_) | |
|
|---|
| 7 | * | (__| |_| | _ <| |___
|
|---|
| 8 | * \___|\___/|_| \_\_____|
|
|---|
| 9 | *
|
|---|
| 10 | * Copyright (C) Daniel Stenberg, <[email protected]>, et al.
|
|---|
| 11 | *
|
|---|
| 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.
|
|---|
| 15 | *
|
|---|
| 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.
|
|---|
| 19 | *
|
|---|
| 20 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
|
|---|
| 21 | * KIND, either express or implied.
|
|---|
| 22 | *
|
|---|
| 23 | * SPDX-License-Identifier: curl
|
|---|
| 24 | *
|
|---|
| 25 | ***************************************************************************/
|
|---|
| 26 |
|
|---|
| 27 | #include "urldata.h"
|
|---|
| 28 | #include "curl_addrinfo.h"
|
|---|
| 29 |
|
|---|
| 30 | #ifndef CURL_DISABLE_DOH
|
|---|
| 31 |
|
|---|
| 32 | typedef enum {
|
|---|
| 33 | DOH_OK,
|
|---|
| 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 */
|
|---|
| 47 | } DOHcode;
|
|---|
| 48 |
|
|---|
| 49 | typedef enum {
|
|---|
| 50 | DNS_TYPE_A = 1,
|
|---|
| 51 | DNS_TYPE_NS = 2,
|
|---|
| 52 | DNS_TYPE_CNAME = 5,
|
|---|
| 53 | DNS_TYPE_AAAA = 28,
|
|---|
| 54 | DNS_TYPE_DNAME = 39 /* RFC6672 */
|
|---|
| 55 | } DNStype;
|
|---|
| 56 |
|
|---|
| 57 | /* one of these for each DoH request */
|
|---|
| 58 | struct dnsprobe {
|
|---|
| 59 | CURL *easy;
|
|---|
| 60 | DNStype dnstype;
|
|---|
| 61 | unsigned char dohbuffer[512];
|
|---|
| 62 | size_t dohlen;
|
|---|
| 63 | struct dynbuf serverdoh;
|
|---|
| 64 | };
|
|---|
| 65 |
|
|---|
| 66 | struct dohdata {
|
|---|
| 67 | struct curl_slist *headers;
|
|---|
| 68 | struct dnsprobe probe[DOH_PROBE_SLOTS];
|
|---|
| 69 | unsigned int pending; /* still outstanding requests */
|
|---|
| 70 | int port;
|
|---|
| 71 | const char *host;
|
|---|
| 72 | };
|
|---|
| 73 |
|
|---|
| 74 | /*
|
|---|
| 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.
|
|---|
| 77 | */
|
|---|
| 78 |
|
|---|
| 79 | struct Curl_addrinfo *Curl_doh(struct Curl_easy *data,
|
|---|
| 80 | const char *hostname,
|
|---|
| 81 | int port,
|
|---|
| 82 | int *waitp);
|
|---|
| 83 |
|
|---|
| 84 | CURLcode Curl_doh_is_resolved(struct Curl_easy *data,
|
|---|
| 85 | struct Curl_dns_entry **dns);
|
|---|
| 86 |
|
|---|
| 87 | int Curl_doh_getsock(struct connectdata *conn, curl_socket_t *socks);
|
|---|
| 88 |
|
|---|
| 89 | #define DOH_MAX_ADDR 24
|
|---|
| 90 | #define DOH_MAX_CNAME 4
|
|---|
| 91 |
|
|---|
| 92 | struct dohaddr {
|
|---|
| 93 | int type;
|
|---|
| 94 | union {
|
|---|
| 95 | unsigned char v4[4]; /* network byte order */
|
|---|
| 96 | unsigned char v6[16];
|
|---|
| 97 | } ip;
|
|---|
| 98 | };
|
|---|
| 99 |
|
|---|
| 100 | struct dohentry {
|
|---|
| 101 | struct dynbuf cname[DOH_MAX_CNAME];
|
|---|
| 102 | struct dohaddr addr[DOH_MAX_ADDR];
|
|---|
| 103 | int numaddr;
|
|---|
| 104 | unsigned int ttl;
|
|---|
| 105 | int numcname;
|
|---|
| 106 | };
|
|---|
| 107 |
|
|---|
| 108 |
|
|---|
| 109 | #ifdef DEBUGBUILD
|
|---|
| 110 | DOHcode doh_encode(const char *host,
|
|---|
| 111 | DNStype dnstype,
|
|---|
| 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,
|
|---|
| 116 | size_t dohlen,
|
|---|
| 117 | DNStype dnstype,
|
|---|
| 118 | struct dohentry *d);
|
|---|
| 119 | void de_init(struct dohentry *d);
|
|---|
| 120 | void de_cleanup(struct dohentry *d);
|
|---|
| 121 | #endif
|
|---|
| 122 |
|
|---|
| 123 | extern struct curl_trc_feat Curl_doh_trc;
|
|---|
| 124 |
|
|---|
| 125 | #else /* if DoH is disabled */
|
|---|
| 126 | #define Curl_doh(a,b,c,d) NULL
|
|---|
| 127 | #define Curl_doh_is_resolved(x,y) CURLE_COULDNT_RESOLVE_HOST
|
|---|
| 128 | #endif
|
|---|
| 129 |
|
|---|
| 130 | #endif /* HEADER_CURL_DOH_H */
|
|---|
