Function get_record

resolve.c:1095–1344

! \brief gets the DNS records for name:type * \return A dyn. alloc'ed struct rdata linked list with the parsed responses * or 0 on error * \note see rfc1035 for the query/response format */

 * or 0 on error
 * \note see rfc1035 for the query/response format */
struct rdata* get_record(char* name, int type)
{
	int size;
	int qno, answers_no;
	int r;
	static union dns_query buff;
	unsigned char* p;
/*	unsigned char* t;
	int ans_len;
	static unsigned char answer[ANS_SIZE]; */
	static int rdata_struct_len=sizeof(struct rdata)-sizeof(void *) -
		sizeof(struct rdata *);
	unsigned char* end;
	unsigned short rtype, class, rdlength;
	unsigned int ttl;
	unsigned int min_ttl = UINT_MAX;
	struct rdata* head;
	struct rdata** crt;
	struct rdata** last;
	struct rdata* rd;
	struct srv_rdata* srv_rd;
	struct srv_rdata* crt_srv;
	struct naptr_rdata* naptr_rd;
	struct txt_rdata* txt_rd;
	struct ebl_rdata* ebl_rd;
	struct timeval start;
	int rdata_buf_len=0;

	if (dnscache_fetch_func != NULL) {
		head = (struct rdata *)dnscache_fetch_func(name,type,0);
		if (head == NULL) {
			LM_DBG("not found in cache or other internal error\n");
			goto query;
		} else if (head == (void *)-1) {
			LM_DBG("previously failed query\n");
			goto not_found;
		} else {
			LM_DBG("cache hit for %s - %d\n",name,type);
			return head;
		}
	}

query:
	start_expire_timer(start,execdnsthreshold);
	size=res_search(name, C_IN, type, buff.buff, sizeof(buff));
	_stop_expire_timer(start, execdnsthreshold, "dns",
	            name, strlen(name), 0, dns_slow_queries, dns_total_queries);

	if (size<0) {
		LM_DBG("lookup(%s, %d) failed\n", name, type);
		if (dnscache_put_func != NULL) {
			if (dnscache_put_func(name,type,NULL,0,1,0) < 0)
				LM_ERR("Failed to store %s - %d in cache\n",name,type);
		}
		goto not_found;
	}
	else if ((unsigned int)size > sizeof(buff)) size=sizeof(buff);
	head=rd=0;