[#2725] fixed v6 reservations

1 files changed, 12 insertions, 3 deletions

diff --git a/src/lib/dhcpsrv/host.cc b/src/lib/dhcpsrv/host.cc
index 73f4548578..0f9c4212ef 100644
--- a/src/lib/dhcpsrv/host.cc
+++ b/src/lib/dhcpsrv/host.cc
@@ -6,13 +6,15 @@
 
 #include <config.h>
 
+#include <asiolink/io_address.h>
+#include <asiolink/addr_utilities.h>
+#include <cryptolink/crypto_rng.h>
 #include <dhcp/pkt4.h>
 #include <dhcpsrv/host.h>
+#include <exceptions/exceptions.h>
+
 #include <util/encode/hex.h>
 #include <util/strutil.h>
-#include <asiolink/io_address.h>
-#include <cryptolink/crypto_rng.h>
-#include <exceptions/exceptions.h>
 
 #include <sstream>
 
@@ -104,6 +106,13 @@ IPv6Resrv::set(const Type& type, const asiolink::IOAddress& prefix,
         isc_throw(isc::BadValue, "invalid prefix length '"
                   << static_cast<int>(prefix_len)
                   << "' for reserved IPv6 address, expected 128");
+    } else if ((type == TYPE_PD) && (prefix_len != 128)) {
+        IOAddress first_address = firstAddrInPrefix(prefix, prefix_len);
+        if (first_address != prefix) {
+            isc_throw(BadValue, "Invalid host address boundaries: " << prefix
+                      << " is not the first address in prefix: " << first_address
+                      << "/" << static_cast<uint32_t>(prefix_len));
+        }
     }
 
     type_ = type;