1 files changed, 48 insertions, 0 deletions
diff --git a/VNFs/DPPD-PROX/ip_subnet.h b/VNFs/DPPD-PROX/ip_subnet.h
new file mode 100644
index 00000000..126efb18
--- /dev/null
+++ b/VNFs/DPPD-PROX/ip_subnet.h
@@ -0,0 +1,48 @@
+/*
+// Copyright (c) 2010-2017 Intel Corporation
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+*/
+
+#ifndef _IP_SUBNET_H_
+#define _IP_SUBNET_H_
+
+#include <inttypes.h>
+
+struct ip4_subnet {
+	uint32_t ip;
+	uint8_t prefix; /* always in range [1,32] inclusive */
+};
+
+struct ip6_subnet {
+	uint8_t ip[16];
+	uint8_t prefix; /* always in range [1,128] inclusive */
+};
+
+/* Returns number of hosts (assuming that network address and
+   broadcast address are both hosts) within the subnet. */
+uint32_t ip4_subet_get_n_hosts(const struct ip4_subnet *sn);
+
+/* Allows to get a specific host within a subnet. Note that the
+   network address and broadcast address are both considered to
+   "hosts". Setting host_index to 0 returns the network address and
+   setting the host_index to the last host within the subnet returns
+   the broadcast. To get all addresses with the subnet, loop
+   host_index from 0 to ip_subnet_get_n_hosts(). */
+int ip4_subnet_to_host(const struct ip4_subnet* sn, uint32_t host_index, uint32_t* ret_ip);
+
+/* Check if IP address is a network address (i.e. all bits outside the
+   prefix are set to 0). */
+int ip4_subnet_is_valid(const struct ip4_subnet* sn);
+
+#endif /* _IP_SUBNET_H_ */