/**
* Load subnet array.
* @param[in] cfg Config section.
* @param[in] option Option name.
* @param[in,out] array Resulting array.
* @return <0 - error. 0 - success. >0 - not found.
*/
static int zcfg_load_subnet_list(const config_setting_t *option, zsubnet_group_t *array)
{
utarray_init(array, &ut_ip_range_icd);
if (!option) {
return 1;
}
if (CONFIG_TYPE_LIST != option->type) {
return -1;
}
int count = config_setting_length(option);
for (int i = 0; i < count; i++) {
ip_range_t range;
char ip_str[INET_ADDRSTRLEN];
const char *item = config_setting_get_string_elem(option, i);
const char *cidr_pos = strchr(item, '/');
// search CIDR, and make sure, that ip part is not bigger than buffer size
if (cidr_pos && (((size_t) (cidr_pos - item) < sizeof(ip_str)))) {
strncpy(ip_str, item, cidr_pos - item);
ip_str[cidr_pos - item] = '\0';
struct in_addr ip_addr;
if (0 < inet_pton(AF_INET, ip_str, &ip_addr)) {
uint8_t cidr = 0;
if ((0 == str_to_u8(cidr_pos + 1, &cidr)) && (cidr <= CIDR_MAX)) {
range.ip_start = ntohl(ip_addr.s_addr);
range.ip_end = IP_RANGE_END(range.ip_start, cidr);
utarray_push_back(array, &range);
continue;
}
}
}
// error handler
ZLOG(LOG_ERR, "config:%s:%s: invalid subnet: %s", option->parent->name, option->name, item);
utarray_done(array);
return -1;
}
if (count) {
utarray_sort(array, ip_range_cmp);
}
return 0;
}
/**
* Load ip-mask array.
* @param[in] cfg Config section.
* @param[in] option Option name.
* @param[in,out] array Resulting array.
* @return Zero on success.
*/
static int load_ip_mask_list(const config_setting_t *cfg, const char *option, UT_array *array)
{
config_setting_t *cfg_list = config_setting_get_member(cfg, option);
if (!cfg_list) {
ZERO_LOG(LOG_ERR, "config: missing %s entry", option);
return 0;
}
if (config_setting_type(cfg_list) != CONFIG_TYPE_LIST) {
ZERO_LOG(LOG_ERR, "config: invalid %s entry", option);
return -1;
}
int count = config_setting_length(cfg_list);
if (0 >= count) {
return 0;
}
utarray_init(array, &ut_ip_range_icd);
for (int i = 0; i < count; i++) {
struct ip_range range;
const char *entry = config_setting_get_string_elem(cfg_list, i);
if (!entry) {
ZERO_LOG(LOG_ERR, "config: failed to get next %s record", option);
continue;
}
char ip_str[INET_ADDRSTRLEN];
const char *cidr_pos = strchr(entry, '/');
// we search for CIDR, and make sure, that ip part is not bigger than allowed size
if (cidr_pos && ((size_t)(cidr_pos - entry) < sizeof(ip_str))) {
strncpy(ip_str, entry, cidr_pos - entry);
ip_str[cidr_pos - entry] = '\0';
struct in_addr ip_addr;
if (0 < inet_pton(AF_INET, ip_str, &ip_addr)) {
u_long cidr = strtoul(cidr_pos + 1, NULL, 10);
if (cidr != ULONG_MAX && cidr <= 32) {
range.ip_start = ntohl(ip_addr.s_addr);
range.ip_end = IP_RANGE_END(range.ip_start, cidr);
utarray_push_back(array, &range);
continue;
}
}
}
// if we here, then entry is invalid
ZERO_LOG(LOG_ERR, "config: invalid %s item: %s", option, entry);
utarray_done(array);
return -1;
}
utarray_sort(array, ip_range_cmp);
return 0;
}