Function get_dnscache_value

modules/dns_cache/dns_cache.c:768–811

Returns hostent or rdata struct, based on what callers needs */

/* Returns hostent or rdata struct, based on what callers needs */
void* get_dnscache_value(char *name,int r_type,int name_len)
{
	str value;
	struct hostent *he;
	struct rdata *head;

	if (cdbc == NULL) {
		/* assume dns request before forking - cache is not ready yet */
		return NULL;
	}

	if (get_dnscache_strvalue(name,r_type,name_len,&value) < 0) {
		LM_DBG("failed to fetch from cache\n");
		return NULL;
	}

	if (value.len == FAILURE_MARKER_LEN && value.s[0] == FAILURE_MARKER_CHAR) {
		LM_DBG("blacklisted value %s for type %d\n",name,r_type);
		pkg_free(value.s);
		return (void *)-1;
	}

	if (r_type == T_A || r_type == T_AAAA || r_type == T_PTR) {
		he = deserialize_he_rdata(value.s,value.len,
			CACHEDB_CAPABILITY(&cdbf,CACHEDB_CAP_BINARY_VALUE)?0:1);
		if (he == NULL) {
			LM_ERR("failed to deserialize he struct\n");
			pkg_free(value.s);
			return NULL;
		}
		pkg_free(value.s);
		return he;
	} else {
		head = deserialize_dns_rdata(value.s,value.len,
			CACHEDB_CAPABILITY(&cdbf,CACHEDB_CAP_BINARY_VALUE)?0:1);
		if (head == NULL) {
			LM_ERR("failed to deserialize rdata struct\n");
			pkg_free(value.s);
			return NULL;
		}
		pkg_free(value.s);
		return head;
	}
}

/* Pushes internal structure ( hostent or rdata ) to a cache backend
 *