1 files changed, 21 insertions, 0 deletions
diff --git a/lib/hostip.h b/lib/hostip.h
index a38f732a4..997800a88 100644
--- a/lib/hostip.h
+++ b/lib/hostip.h
@@ -201,6 +201,27 @@ extern sigjmp_buf curl_jmpenv;
 CURLcode Curl_set_dns_servers(struct SessionHandle *data, char *servers);
 
 /*
+ * Function provided by the resolver backend to set
+ * outgoing interface to use for DNS requests
+ */
+CURLcode Curl_set_dns_interface(struct SessionHandle *data,
+                                const char *interface);
+
+/*
+ * Function provided by the resolver backend to set
+ * local IPv4 address to use as source address for DNS requests
+ */
+CURLcode Curl_set_dns_local_ip4(struct SessionHandle *data,
+                                const char *local_ip4);
+
+/*
+ * Function provided by the resolver backend to set
+ * local IPv6 address to use as source address for DNS requests
+ */
+CURLcode Curl_set_dns_local_ip6(struct SessionHandle *data,
+                                const char *local_ip6);
+
+/*
  * Clean off entries from the cache
  */
 void Curl_hostcache_clean(struct SessionHandle *data, struct curl_hash *hash);