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curl/lib/doh.h
Daniel Stenberg a55faf33d4
cleanup: remove the 'numsocks' argument used in many places
It was used (intended) to pass in the size of the 'socks' array that is
also passed to these functions, but was rarely actually checked/used and
the array is defined to a fixed size of MAX_SOCKSPEREASYHANDLE entries
that should be used instead.

Closes #4169
2019-07-30 23:16:44 +02:00

113 lines
3.2 KiB
C

#ifndef HEADER_CURL_DOH_H
#define HEADER_CURL_DOH_H
/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 2018 - 2019, Daniel Stenberg, <daniel@haxx.se>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at https://curl.haxx.se/docs/copyright.html.
*
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
* copies of the Software, and permit persons to whom the Software is
* furnished to do so, under the terms of the COPYING file.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
***************************************************************************/
#include "urldata.h"
#include "curl_addrinfo.h"
#ifndef CURL_DISABLE_DOH
/*
* Curl_doh() resolve a name using DoH (DNS-over-HTTPS). It resolves a name
* and returns a 'Curl_addrinfo *' with the address information.
*/
Curl_addrinfo *Curl_doh(struct connectdata *conn,
const char *hostname,
int port,
int *waitp);
CURLcode Curl_doh_is_resolved(struct connectdata *conn,
struct Curl_dns_entry **dns);
int Curl_doh_getsock(struct connectdata *conn, curl_socket_t *socks);
typedef enum {
DOH_OK,
DOH_DNS_BAD_LABEL, /* 1 */
DOH_DNS_OUT_OF_RANGE, /* 2 */
DOH_DNS_LABEL_LOOP, /* 3 */
DOH_TOO_SMALL_BUFFER, /* 4 */
DOH_OUT_OF_MEM, /* 5 */
DOH_DNS_RDATA_LEN, /* 6 */
DOH_DNS_MALFORMAT, /* 7 */
DOH_DNS_BAD_RCODE, /* 8 - no such name */
DOH_DNS_UNEXPECTED_TYPE, /* 9 */
DOH_DNS_UNEXPECTED_CLASS, /* 10 */
DOH_NO_CONTENT, /* 11 */
DOH_DNS_BAD_ID /* 12 */
} DOHcode;
typedef enum {
DNS_TYPE_A = 1,
DNS_TYPE_NS = 2,
DNS_TYPE_CNAME = 5,
DNS_TYPE_AAAA = 28
} DNStype;
#define DOH_MAX_ADDR 24
#define DOH_MAX_CNAME 4
struct cnamestore {
size_t len; /* length of cname */
char *alloc; /* allocated pointer */
size_t allocsize; /* allocated size */
};
struct dohaddr {
int type;
union {
unsigned char v4[4]; /* network byte order */
unsigned char v6[16];
} ip;
};
struct dohentry {
unsigned int ttl;
int numaddr;
struct dohaddr addr[DOH_MAX_ADDR];
int numcname;
struct cnamestore cname[DOH_MAX_CNAME];
};
#ifdef DEBUGBUILD
DOHcode doh_encode(const char *host,
DNStype dnstype,
unsigned char *dnsp, /* buffer */
size_t len, /* buffer size */
size_t *olen); /* output length */
DOHcode doh_decode(unsigned char *doh,
size_t dohlen,
DNStype dnstype,
struct dohentry *d);
void de_cleanup(struct dohentry *d);
#endif
#else /* if DOH is disabled */
#define Curl_doh(a,b,c,d) NULL
#define Curl_doh_is_resolved(x,y) CURLE_COULDNT_RESOLVE_HOST
#endif
#endif /* HEADER_CURL_DOH_H */