1 files changed, 59 insertions, 0 deletions
diff --git a/grpc/third_party/cares/cares/src/lib/ares_freeaddrinfo.c b/grpc/third_party/cares/cares/src/lib/ares_freeaddrinfo.c
new file mode 100644
index 00000000..d8891bbf
--- /dev/null
+++ b/grpc/third_party/cares/cares/src/lib/ares_freeaddrinfo.c
@@ -0,0 +1,59 @@
+
+/* Copyright 1998 by the Massachusetts Institute of Technology.
+ * Copyright (C) 2019 by Andrew Selivanov
+ *
+ * Permission to use, copy, modify, and distribute this
+ * software and its documentation for any purpose and without
+ * fee is hereby granted, provided that the above copyright
+ * notice appear in all copies and that both that copyright
+ * notice and this permission notice appear in supporting
+ * documentation, and that the name of M.I.T. not be used in
+ * advertising or publicity pertaining to distribution of the
+ * software without specific, written prior permission.
+ * M.I.T. makes no representations about the suitability of
+ * this software for any purpose.  It is provided "as is"
+ * without express or implied warranty.
+ */
+
+#include "ares_setup.h"
+
+#ifdef HAVE_NETDB_H
+#  include <netdb.h>
+#endif
+
+#include "ares.h"
+#include "ares_private.h"
+
+void ares__freeaddrinfo_cnames(struct ares_addrinfo_cname *head)
+{
+  struct ares_addrinfo_cname *current;
+  while (head)
+    {
+      current = head;
+      head = head->next;
+      ares_free(current->alias);
+      ares_free(current->name);
+      ares_free(current);
+    }
+}
+
+void ares__freeaddrinfo_nodes(struct ares_addrinfo_node *head)
+{
+  struct ares_addrinfo_node *current;
+  while (head)
+    {
+      current = head;
+      head = head->ai_next;
+      ares_free(current->ai_addr);
+      ares_free(current);
+    }
+}
+
+void ares_freeaddrinfo(struct ares_addrinfo *ai)
+{
+  if (ai == NULL)
+    return;
+  ares__freeaddrinfo_cnames(ai->cnames);
+  ares__freeaddrinfo_nodes(ai->nodes);
+  ares_free(ai);
+}