1 files changed, 33 insertions, 0 deletions
diff --git a/src/resolve/resolved-dns-cache.c b/src/resolve/resolved-dns-cache.c
index 2179a61890..6124ff659c 100644
--- a/src/resolve/resolved-dns-cache.c
+++ b/src/resolve/resolved-dns-cache.c
@@ -731,6 +731,39 @@ int dns_cache_check_conflicts(DnsCache *cache, DnsResourceRecord *rr, int owner_
         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;