Add systemd script

src/util.h

@@ -0,0 +1,17 @@
+
+
+#ifndef SMART_DNS_UTIL_H
+#define SMART_DNS_UTIL_H
+
+#include <netdb.h>
+
+#define PORT_NOT_DEFINED -1
+#define MAX_IP_LEN 64
+
+unsigned long get_tick_count(void);
+
+char *gethost_by_addr(char *host, struct sockaddr *addr, socklen_t addr_len);
+
+int parse_ip(const char *value, char *ip, int *port);
+
+#endif