Add systemd script

src/dns_client.h

@@ -0,0 +1,35 @@
+#ifndef _SMART_DNS_CLIENT_H
+#define _SMART_DNS_CLIENT_H
+
+#include "dns.h"
+
+typedef enum {
+	DNS_SERVER_UDP,
+	DNS_SERVER_TCP,
+	DNS_SERVER_HTTP,
+	DNS_SERVER_TYPE_END,
+} dns_server_type_t;
+
+typedef enum dns_result_type {
+	DNS_QUERY_ERR,
+	DNS_QUERY_RESULT = 1,
+	DNS_QUERY_END,
+} dns_result_type;
+
+int dns_client_init(void);
+
+/* query result notify function */
+typedef int (*dns_client_callback)(char *domain, dns_result_type rtype, struct dns_packet *packet, unsigned char *inpacket, int inpacket_len, void *user_ptr);
+
+/* query domain */
+int dns_client_query(char *domain, int qtype, dns_client_callback callback, void *user_ptr);
+
+void dns_client_exit(void);
+
+/* add remote dns server */
+int dns_add_server(char *server_ip, int port, dns_server_type_t server_type);
+
+/* remove remote dns server */
+int dns_remove_server(char *server_ip, int port, dns_server_type_t server_type);
+
+#endif