--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dds.c	Mon Mar 31 17:03:38 2014 +0200
@@ -0,0 +1,76 @@
+#ifdef _CVI_
+#include <winsock2.h>
+#include <ansi_c.h>
+#else
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <errno.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <netdb.h>
+#include <ctype.h>
+#include <math.h>
+#include <stdarg.h>
+#endif
+
+#include "dds.h"
+
+int msend(int fd, char *buffer, int n)
+{
+	int r;
+
+	buffer[n++] = '\r';
+	buffer[n++] = '\n';
+
+	r = send(fd, buffer, n, 0);
+	if (r < 0)
+		return r;     
+
+	return 0;
+}
+
+
+int mrecv(int fd, char *buffer, int len)
+{
+	int n;
+
+	n = recv(fd, buffer, len, 0);
+	if (n < 0)
+		return n;
+
+	if ((buffer[--n] != '\n') || (buffer[--n] != '\r'))
+		return -1;
+
+	buffer[n] = '\0';
+
+	return n;
+}
+
+
+int command(int fd, char *frmt, ...)
+{
+	int r, n;
+	char buffer[1024];
+	va_list v;
+
+	va_start(v, frmt);
+	n = vsnprintf(buffer, sizeof(buffer) - 2, frmt, v);
+	va_end(v);
+
+	r = msend(fd, buffer, n);
+	if (r < 0)
+		return r;
+
+	r = mrecv(fd, buffer, sizeof(buffer));
+	if (r < 0)
+		return r;
+
+	if (! streq(buffer, "OK"))
+		return -1;
+
+	return 0;
+}