dns: support domain compress.

src/dns.h

@@ -113,11 +113,15 @@ struct dns_head {
 	unsigned short nrcount; /* number of addititional resource entries */
 } __attribute__((packed, aligned(2)));
 
-struct dns_rrs {
-	unsigned short next;
-	unsigned short len;
-	dns_type_t type;
-	unsigned char data[0];
+#define DNS_PACKET_DICT_SIZE 16
+struct dns_packet_dict_item {
+	unsigned pos;
+	unsigned int hash;
+};
+
+struct dns_packet_dict {
+	short dict_count;
+	struct dns_packet_dict_item names[DNS_PACKET_DICT_SIZE];
 };
 
 /* packet haed */
@@ -130,21 +134,24 @@ struct dns_packet {
 	unsigned short optcount;
 	unsigned short optional;
 	unsigned short payloadsize;
+	struct dns_packet_dict namedict;
 	int size;
 	int len;
 	unsigned char data[0];
 };
 
-/* RRS encode/decode context */
-struct dns_data_context {
-	unsigned char *data;
-	unsigned char *ptr;
-	unsigned int maxsize;
+struct dns_rrs {
+	struct dns_packet *packet;
+	unsigned short next;
+	unsigned short len;
+	dns_type_t type;
+	unsigned char data[0];
 };
 
 /* packet encode/decode context */
 struct dns_context {
 	struct dns_packet *packet;
+	struct dns_packet_dict *namedict;
 	unsigned char *data;
 	unsigned int maxsize;
 	unsigned char *ptr;
@@ -234,4 +241,12 @@ int dns_encode(unsigned char *data, int size, struct dns_packet *packet);
 
 int dns_packet_init(struct dns_packet *packet, int size, struct dns_head *head);
 
+struct dns_update_param {
+	int id;
+	int ip_ttl;
+	int cname_ttl;
+};
+
+int dns_packet_update(unsigned char *data, int size, struct dns_update_param *param);
+
 #endif

src/dns_conf.c

@@ -1176,11 +1176,13 @@ static int _config_iplist_rule(char *subnet, enum address_rule rule)
 static int _config_qtype_soa(void *data, int argc, char *argv[])
 {
 	struct dns_qtype_soa_list *soa_list;
+	int i = 0;
+
 	if (argc <= 1) {
 		return -1;
 	}
 
-	for (int i = 1; i < argc; i++) {
+	for (i = 1; i < argc; i++) {
 		soa_list = malloc(sizeof(*soa_list));
 		if (soa_list == NULL) {
 			tlog(TLOG_ERROR, "cannot malloc memory");

src/util.c

@@ -1049,6 +1049,7 @@ void print_stack(void)
 {
 	const size_t max_buffer = 30;
 	void *buffer[max_buffer];
+	int idx = 0;
 
 	struct backtrace_state state = {buffer, buffer + max_buffer};
 	_Unwind_Backtrace(unwind_callback, &state);
@@ -1058,7 +1059,7 @@ void print_stack(void)
 	}
 	
 	tlog(TLOG_FATAL, "Stack:");
-	for (int idx = 0; idx < frame_num; ++idx) {
+	for (idx = 0; idx < frame_num; ++idx) {
 		const void *addr = buffer[idx];
 		const char *symbol = "";