return 1;
}
+int dns_cache_export_shared_to_packet(DnsCache *cache, DnsPacket *p) {
+ unsigned ancount = 0;
+ Iterator iterator;
+ DnsCacheItem *i;
+ int r;
+
+ assert(cache);
+
+ HASHMAP_FOREACH(i, cache->by_key, iterator) {
+ DnsCacheItem *j;
+
+ LIST_FOREACH(by_key, j, i) {
+ _cleanup_free_ char *t = NULL;
+
+ if (!j->rr)
+ continue;
+
+ if (!dns_key_is_shared(j->rr->key))
+ continue;
+
+ r = dns_packet_append_rr(p, j->rr, NULL, NULL);
+ if (r < 0)
+ return r;
+
+ ancount ++;
+ }
+ }
+
+ DNS_PACKET_HEADER(p)->ancount = htobe16(ancount);
+
+ return 0;
+}
+
void dns_cache_dump(DnsCache *cache, FILE *f) {
Iterator iterator;
DnsCacheItem *i;
} DnsCache;
#include "resolved-dns-answer.h"
+#include "resolved-dns-packet.h"
#include "resolved-dns-question.h"
#include "resolved-dns-rr.h"
void dns_cache_dump(DnsCache *cache, FILE *f);
bool dns_cache_is_empty(DnsCache *cache);
+
+int dns_cache_export_shared_to_packet(DnsCache *cache, DnsPacket *p);
int dns_resource_key_to_string(const DnsResourceKey *key, char **ret);
DEFINE_TRIVIAL_CLEANUP_FUNC(DnsResourceKey*, dns_resource_key_unref);
+static inline bool dns_key_is_shared(const DnsResourceKey *key) {
+ return IN_SET(key->type, DNS_TYPE_PTR);
+}
+
DnsResourceRecord* dns_resource_record_new(DnsResourceKey *key);
DnsResourceRecord* dns_resource_record_new_full(uint16_t class, uint16_t type, const char *name);
DnsResourceRecord* dns_resource_record_ref(DnsResourceRecord *rr);
#include "dns-domain.h"
#include "fd-util.h"
#include "random-util.h"
+#include "resolved-dns-cache.h"
#include "resolved-dns-transaction.h"
#include "resolved-llmnr.h"
#include "string-table.h"
static int dns_transaction_make_packet_mdns(DnsTransaction *t) {
_cleanup_(dns_packet_unrefp) DnsPacket *p = NULL;
+ bool add_known_answers = false;
DnsTransaction *other;
unsigned qdcount;
usec_t ts;
qdcount = 1;
+ if (dns_key_is_shared(t->key))
+ add_known_answers = true;
+
/*
* For mDNS, we want to coalesce as many open queries in pending transactions into one single
* query packet on the wire as possible. To achieve that, we iterate through all pending transactions
other->next_attempt_after = ts;
qdcount ++;
+
+ if (dns_key_is_shared(other->key))
+ add_known_answers = true;
}
DNS_PACKET_HEADER(p)->qdcount = htobe16(qdcount);
DNS_PACKET_HEADER(p)->id = t->id;
+ /* Append known answer section if we're asking for any shared record */
+ if (add_known_answers) {
+ r = dns_cache_export_shared_to_packet(&t->scope->cache, p);
+ if (r < 0)
+ return r;
+ }
+
t->sent = p;
p = NULL;