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-rw-r--r--src/resolve/resolved-dns-question.c40
1 files changed, 40 insertions, 0 deletions
diff --git a/src/resolve/resolved-dns-question.c b/src/resolve/resolved-dns-question.c
index 4d71f5e3d4..0efe740d1a 100644
--- a/src/resolve/resolved-dns-question.c
+++ b/src/resolve/resolved-dns-question.c
@@ -188,6 +188,46 @@ int dns_question_is_superset(DnsQuestion *q, DnsQuestion *other) {
return 1;
}
+int dns_question_contains(DnsQuestion *a, DnsResourceKey *k) {
+ unsigned j;
+ int r;
+
+ assert(a);
+ assert(k);
+
+ for (j = 0; j < a->n_keys; j++) {
+ r = dns_resource_key_equal(a->keys[j], k);
+ if (r != 0)
+ return r;
+ }
+
+ return 0;
+}
+
+int dns_question_is_equal(DnsQuestion *a, DnsQuestion *b) {
+ unsigned j;
+ int r;
+
+ assert(a);
+ assert(b);
+
+ /* Checks if all keys in a are also contained b, and vice versa */
+
+ for (j = 0; j < a->n_keys; j++) {
+ r = dns_question_contains(b, a->keys[j]);
+ if (r <= 0)
+ return r;
+ }
+
+ for (j = 0; j < b->n_keys; j++) {
+ r = dns_question_contains(a, b->keys[j]);
+ if (r <= 0)
+ return r;
+ }
+
+ return 1;
+}
+
int dns_question_cname_redirect(DnsQuestion *q, const char *name, DnsQuestion **ret) {
_cleanup_(dns_question_unrefp) DnsQuestion *n = NULL;
bool same = true;