+static int hostapd_get_interface_names(char ***if_names,
+ size_t *if_names_size,
+ char *optarg)
+{
+ char *if_name, *tmp, **nnames;
+ size_t i;
+
+ if (!optarg)
+ return -1;
+ if_name = strtok_r(optarg, ",", &tmp);
+
+ while (if_name) {
+ nnames = os_realloc_array(*if_names, 1 + *if_names_size,
+ sizeof(char *));
+ if (!nnames)
+ goto fail;
+ *if_names = nnames;
+
+ (*if_names)[*if_names_size] = os_strdup(if_name);
+ if (!(*if_names)[*if_names_size])
+ goto fail;
+ (*if_names_size)++;
+ if_name = strtok_r(NULL, ",", &tmp);
+ }
+
+ return 0;
+
+fail:
+ for (i = 0; i < *if_names_size; i++)
+ os_free((*if_names)[i]);
+ os_free(*if_names);
+ *if_names = NULL;
+ *if_names_size = 0;
+ return -1;
+}
+
+