Added fqdn to qname

1 files changed, 40 insertions, 0 deletions

diff --git a/src/dns.c b/src/dns.c
new file mode 100644
index 0000000..5045e2a
--- /dev/null
+++ b/src/dns.c
@@ -0,0 +1,40 @@
+#include "dns.h"
+
+int fqdn_to_qname( char* _source, int _sourcelen, char* _sink ,int _sinklen )
+{
+	// TODO Opttimize
+	int i = 0;
+	int lastdot = 0;
+
+	if (_sourcelen < 1 || _sinklen < 1)
+		return -1;
+
+	_sink[0] = ' '; //Set to known value
+
+	while ( (i < _sourcelen) && (i < (_sinklen - 1))) { //Copy offset 1
+		if(! _source[i])
+			break;
+		_sink[i+1] = _source[i];
+		i++;
+	}
+
+	if( _source[i] ) // _source not terminated
+		return -1;
+
+	for (int o = 0; o < i; o++) {
+		if( _sink[o] == '.') {
+			_sink[lastdot] = o - lastdot - 1;
+			lastdot = o;
+		}
+	}
+
+	_sink[lastdot] = i - lastdot;
+	_sink[i + 1] = 0;
+
+	return i+2; 
+}
+
+int qname_to_fqdn( char* _source, int _sourcelen, char* _sink, int _sinklen )
+{
+	return -1;
+}