2 // Copyright (c) 2010-2017 Intel Corporation
4 // Licensed under the Apache License, Version 2.0 (the "License");
5 // you may not use this file except in compliance with the License.
6 // You may obtain a copy of the License at
8 // http://www.apache.org/licenses/LICENSE-2.0
10 // Unless required by applicable law or agreed to in writing, software
11 // distributed under the License is distributed on an "AS IS" BASIS,
12 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 // See the License for the specific language governing permissions and
14 // limitations under the License.
17 #include "ip_subnet.h"
18 #include "prox_assert.h"
20 uint32_t ip4_subet_get_n_hosts(const struct ip4_subnet *sn)
22 PROX_ASSERT(sn->prefix <= 32 && sn->prefix >= 1);
23 return 1 << (32 - sn->prefix);
26 int ip4_subnet_to_host(const struct ip4_subnet *sn, uint32_t host_index, uint32_t *ret_ip)
28 PROX_ASSERT(ip4_subnet_is_valid(sn));
30 if (host_index >= ip4_subet_get_n_hosts(sn)) {
34 *ret_ip = sn->ip + host_index;
38 int ip4_subnet_is_valid(const struct ip4_subnet *sn)
40 if (sn->prefix == 0) {
44 return (sn->ip & ~(((int)(1 << 31)) >> (sn->prefix - 1))) == 0;