1 files changed, 122 insertions, 0 deletions
diff --git a/src/lib/dhcpsrv/cfg_duid.cc b/src/lib/dhcpsrv/cfg_duid.cc
new file mode 100644
index 0000000..fe17f20
--- /dev/null
+++ b/src/lib/dhcpsrv/cfg_duid.cc
@@ -0,0 +1,122 @@
+// Copyright (C) 2015-2020 Internet Systems Consortium, Inc. ("ISC")
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+#include <config.h>
+
+#include <dhcp/duid_factory.h>
+#include <dhcpsrv/cfg_duid.h>
+#include <util/encode/hex.h>
+#include <util/strutil.h>
+#include <iostream>
+#include <string>
+#include <string.h>
+
+using namespace isc;
+using namespace isc::data;
+using namespace isc::util::encode;
+using namespace isc::util::str;
+
+namespace isc {
+namespace dhcp {
+
+CfgDUID::CfgDUID()
+    : type_(DUID::DUID_LLT), identifier_(), htype_(0), time_(0),
+      enterprise_id_(0), persist_(true) {
+}
+
+void
+CfgDUID::setIdentifier(const std::string& identifier_as_hex) {
+    // Remove whitespaces.
+    const std::string identifier = trim(identifier_as_hex);
+    // Temporary result of parsing.
+    std::vector<uint8_t> binary;
+    if (!identifier.empty()) {
+        try {
+            // Decode identifier specified as a string of hexadecimal digits.
+            decodeHex(identifier, binary);
+            // All went ok, so let's replace identifier with a new value.
+            identifier_.swap(binary);
+        } catch (const std::exception& ex) {
+            isc_throw(BadValue, "identifier specified in the DUID"
+                      " configuration '" << identifier
+                      << "' is not a valid string of hexadecimal digits");
+        }
+
+    } else {
+         // If specified identifier is empty, clear our internal identifier.
+        identifier_.clear();
+    }
+}
+
+DuidPtr
+CfgDUID::create(const std::string& duid_file_path) {
+    // Forget the current DUID.
+    current_duid_.reset();
+
+    // Use DUID factory to create a DUID instance.
+    DUIDFactory factory(persist() ? duid_file_path : "");
+
+    switch (getType()) {
+    case DUID::DUID_LLT:
+        factory.createLLT(getHType(), getTime(), getIdentifier());
+        break;
+    case DUID::DUID_EN:
+        factory.createEN(getEnterpriseId(), getIdentifier());
+        break;
+    case DUID::DUID_LL:
+        factory.createLL(getHType(), getIdentifier());
+        break;
+    default:
+        // This should actually never happen.
+        isc_throw(Unexpected, "invalid DUID type used " << getType()
+                  << " to create a new DUID");
+    }
+
+    // Save the newly created DUID.
+    current_duid_ = factory.get();
+
+    // Return generated DUID.
+    return (current_duid_);
+}
+
+ElementPtr
+CfgDUID::toElement() const {
+    ElementPtr result = Element::createMap();
+    // Set user context
+    contextToElement(result);
+    // The type item is required
+    std::string duid_type = "LLT";
+    switch (type_) {
+    case DUID::DUID_LLT:
+        break;
+    case DUID::DUID_EN:
+        duid_type = "EN";
+        break;
+    case DUID::DUID_LL:
+        duid_type = "LL";
+        break;
+    default:
+        isc_throw(ToElementError, "invalid DUID type: " << getType());
+        break;
+    }
+    result->set("type", Element::create(duid_type));
+    // Set the identifier
+    result->set("identifier",
+                Element::create(util::encode::encodeHex(identifier_)));
+    // Set the hardware type
+    result->set("htype", Element::create(htype_));
+    // Set the time
+    result->set("time", Element::create(static_cast<long long>(time_)));
+    // Set the enterprise id
+    result->set("enterprise-id",
+                Element::create(static_cast<long long>(enterprise_id_)));
+    // Set the persistence flag
+    result->set("persist", Element::create(persist_));
+    return (result);
+}
+
+}
+}