started rousource record storeage and query

1 files changed, 100 insertions, 0 deletions

diff --git a/src/zonefile.c b/src/zonefile.c
new file mode 100644
index 0000000..3ed47c8
--- /dev/null
+++ b/src/zonefile.c
@@ -0,0 +1,100 @@
+/*
+ * zonefile.c
+ * (c) 2019 Jonas Gunz
+ * License: MIT
+ * */
+
+#include "zonefile.h"
+
+int zonefile_parse ( char* _filename, struct record_node* _dns_zone )
+{
+	return 1;
+}
+
+int zonefile_query ( char* _hostname, struct record_entry* _entry )
+{
+	return 1;
+}
+
+static int tree_insert ( struct record_node* _root, struct record_entry* _node )
+{
+	struct record_node* node = _root;
+
+	while(node) {
+		int ret = string_compare ( node->rr->name, _node->name );
+		if ( ret > 0 ) {
+			node = node->above;
+		} else if ( ret < 0 ) {
+			node = node->below;
+		} else { //Already exists
+			return 1;
+		}
+	}
+
+	node = malloc (sizeof(*node));
+	if(!node)
+		return 1;
+
+	node->rr = _node;
+
+	return 0;
+}
+
+static int tree_balance ( struct record_node* _root )
+{
+	return 1;
+}
+
+static struct record_entry* tree_get ( struct record_node* _root, char* _query )
+{
+	struct record_node* node = _root;
+
+	while(node) {
+		int ret = string_compare ( node->rr->name, _query );
+		if ( ret > 0 ) {
+			node = node->above;
+		} else if ( ret < 0 ) {
+			node = node->below;
+		} else {
+			break;
+		}
+	}
+
+	return node ? node->rr : NULL;
+
+	return 0;
+}
+
+static int tree_destroy ( struct record_node* _root )
+{
+	return 1;
+}
+
+int string_compare ( char* _1, char* _2 )
+{
+	if ( !_1 || !_2 )
+		return 99;
+	int i;
+	for (i = 0; _1[i] && _2[i]; i++) {
+		char c1 = _1[i];
+		char c2 = _2[i];
+
+		//Convert to uppercase
+		if ( c1 >= 97 && c1 <= 122 )
+			c1 -= 32;
+		if ( c2 >= 97 && c2 <= 122 )
+			c2 -= 32;
+
+		if (c1 > c2)
+			return 1;
+		if (c1 < c2)
+			return -1;
+	}
+
+	if ( _1[i] == _2[i] )
+		return 0;
+	if ( _1[i] )
+		return 1;
+	if ( _2[i] )
+		return -1;
+}