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network: Introduce sd_dns_resolver

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This type will be used to represent a "designated resolver", and the
necessary info for communicating with it. Beyond and address endpoint,
we may need to know the dns transport, authenticated domain name, DoH
path, etc.
This commit is contained in:
Ronan Pigott
2024-09-13 22:57:50 -07:00
parent 427166c3b0
commit 1e2ead52e1
10 changed files with 479 additions and 40 deletions
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src/resolve/resolved-dns-packet.c
+2 -21
View File
@@ -4,6 +4,8 @@
# include <gcrypt.h>
#endif
#include "dns-resolver-internal.h"
#include "alloc-util.h"
#include "dns-domain.h"
#include "escape.h"
@@ -2955,27 +2957,6 @@ const char* format_dns_ede_rcode(int i, char buf[static DECIMAL_STR_MAX(int)]) {
return snprintf_ok(buf, DECIMAL_STR_MAX(int), "%i", i);
}
static const char* const dns_svc_param_key_table[_DNS_SVC_PARAM_KEY_MAX_DEFINED] = {
[DNS_SVC_PARAM_KEY_MANDATORY] = "mandatory",
[DNS_SVC_PARAM_KEY_ALPN] = "alpn",
[DNS_SVC_PARAM_KEY_NO_DEFAULT_ALPN] = "no-default-alpn",
[DNS_SVC_PARAM_KEY_PORT] = "port",
[DNS_SVC_PARAM_KEY_IPV4HINT] = "ipv4hint",
[DNS_SVC_PARAM_KEY_ECH] = "ech",
[DNS_SVC_PARAM_KEY_IPV6HINT] = "ipv6hint",
[DNS_SVC_PARAM_KEY_DOHPATH] = "dohpath",
[DNS_SVC_PARAM_KEY_OHTTP] = "ohttp",
};
DEFINE_STRING_TABLE_LOOKUP_TO_STRING(dns_svc_param_key, int);
const char* format_dns_svc_param_key(uint16_t i, char buf[static DECIMAL_STR_MAX(uint16_t)+3]) {
const char *p = dns_svc_param_key_to_string(i);
if (p)
return p;
return snprintf_ok(buf, DECIMAL_STR_MAX(uint16_t)+3, "key%i", i);
}
static const char* const dns_protocol_table[_DNS_PROTOCOL_MAX] = {
[DNS_PROTOCOL_DNS] = "dns",
[DNS_PROTOCOL_MDNS] = "mdns",
src/resolve/resolved-dns-packet.h
-19
View File
@@ -362,25 +362,6 @@ const char* format_dns_ede_rcode(int i, char buf[static DECIMAL_STR_MAX(int)]);
const char* dns_protocol_to_string(DnsProtocol p) _const_;
DnsProtocol dns_protocol_from_string(const char *s) _pure_;
/* https://www.iana.org/assignments/dns-svcb/dns-svcb.xhtml#dns-svcparamkeys */
enum {
DNS_SVC_PARAM_KEY_MANDATORY = 0, /* RFC 9460 section 8 */
DNS_SVC_PARAM_KEY_ALPN = 1, /* RFC 9460 section 7.1 */
DNS_SVC_PARAM_KEY_NO_DEFAULT_ALPN = 2, /* RFC 9460 Section 7.1 */
DNS_SVC_PARAM_KEY_PORT = 3, /* RFC 9460 section 7.2 */
DNS_SVC_PARAM_KEY_IPV4HINT = 4, /* RFC 9460 section 7.3 */
DNS_SVC_PARAM_KEY_ECH = 5, /* RFC 9460 */
DNS_SVC_PARAM_KEY_IPV6HINT = 6, /* RFC 9460 section 7.3 */
DNS_SVC_PARAM_KEY_DOHPATH = 7, /* RFC 9461 */
DNS_SVC_PARAM_KEY_OHTTP = 8,
_DNS_SVC_PARAM_KEY_MAX_DEFINED,
DNS_SVC_PARAM_KEY_INVALID = 65535 /* RFC 9460 */
};
const char* dns_svc_param_key_to_string(int i) _const_;
const char* format_dns_svc_param_key(uint16_t i, char buf[static DECIMAL_STR_MAX(uint16_t)+3]);
#define FORMAT_DNS_SVC_PARAM_KEY(i) format_dns_svc_param_key(i, (char [DECIMAL_STR_MAX(uint16_t)+3]) {})
#define LLMNR_MULTICAST_IPV4_ADDRESS ((struct in_addr) { .s_addr = htobe32(224U << 24 | 252U) })
#define LLMNR_MULTICAST_IPV6_ADDRESS ((struct in6_addr) { .s6_addr = { 0xFF, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x03 } })
src/resolve/resolved-dns-rr.c
+2
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@@ -2,6 +2,8 @@
#include <math.h>
#include "dns-resolver-internal.h"
#include "alloc-util.h"
#include "dns-domain.h"
#include "dns-type.h"