1 files changed, 120 insertions, 0 deletions
diff --git a/src/lib/dhcp/option6_ia.cc b/src/lib/dhcp/option6_ia.cc
new file mode 100644
index 0000000..2b41490
--- /dev/null
+++ b/src/lib/dhcp/option6_ia.cc
@@ -0,0 +1,120 @@
+// Copyright (C) 2011-2022 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/dhcp6.h>
+#include <dhcp/libdhcp++.h>
+#include <dhcp/option6_ia.h>
+#include <dhcp/option_space.h>
+#include <exceptions/exceptions.h>
+#include <util/io_utilities.h>
+
+#include <arpa/inet.h>
+#include <sstream>
+#include <stdint.h>
+
+using namespace std;
+using namespace isc::util;
+
+namespace isc {
+namespace dhcp {
+
+Option6IA::Option6IA(uint16_t type, uint32_t iaid)
+    :Option(Option::V6, type), iaid_(iaid), t1_(0), t2_(0) {
+
+    // IA_TA has different layout than IA_NA and IA_PD. We can't use this class
+    if (type == D6O_IA_TA) {
+        isc_throw(BadValue, "Can't use Option6IA for IA_TA as it has "
+                  "a different layout");
+    }
+
+    setEncapsulatedSpace(DHCP6_OPTION_SPACE);
+}
+
+Option6IA::Option6IA(uint16_t type, OptionBufferConstIter begin,
+                     OptionBufferConstIter end)
+    :Option(Option::V6, type) {
+
+    // IA_TA has different layout than IA_NA and IA_PD. We can't use this class
+    if (type == D6O_IA_TA) {
+        isc_throw(BadValue, "Can't use Option6IA for IA_TA as it has "
+                  "a different layout");
+    }
+
+    setEncapsulatedSpace(DHCP6_OPTION_SPACE);
+
+    unpack(begin, end);
+}
+
+OptionPtr
+Option6IA::clone() const {
+    return (cloneInternal<Option6IA>());
+}
+
+void Option6IA::pack(isc::util::OutputBuffer& buf, bool) const {
+    buf.writeUint16(type_);
+    buf.writeUint16(len() - OPTION6_HDR_LEN);
+    buf.writeUint32(iaid_);
+    buf.writeUint32(t1_);
+    buf.writeUint32(t2_);
+
+    packOptions(buf);
+}
+
+void Option6IA::unpack(OptionBufferConstIter begin,
+                       OptionBufferConstIter end) {
+    // IA_NA and IA_PD have 12 bytes content (iaid, t1, t2 fields)
+    // followed by 0 or more sub-options.
+    if (distance(begin, end) < OPTION6_IA_LEN) {
+        isc_throw(OutOfRange, "Option " << type_ << " truncated");
+    }
+    iaid_ = readUint32(&(*begin), distance(begin, end));
+    begin += sizeof(uint32_t);
+    t1_ = readUint32(&(*begin), distance(begin, end));
+    begin += sizeof(uint32_t);
+
+    t2_ = readUint32(&(*begin), distance(begin, end));
+    begin += sizeof(uint32_t);
+
+    unpackOptions(OptionBuffer(begin, end));
+}
+
+std::string Option6IA::toText(int indent) const {
+    stringstream output;
+
+    switch(getType()) {
+    case D6O_IA_NA:
+        output << headerToText(indent, "IA_NA");
+        break;
+    case D6O_IA_PD:
+        output << headerToText(indent, "IA_PD");
+        break;
+    default:
+        output << headerToText(indent);
+    }
+
+    output << ": iaid=" << iaid_ << ", t1=" << t1_ << ", t2=" << t2_
+           << suboptionsToText(indent + 2);
+
+    return (output.str());
+}
+
+uint16_t Option6IA::len() const {
+
+    uint16_t length = OPTION6_HDR_LEN /*header (4)*/ +
+        OPTION6_IA_LEN  /* option content (12) */;
+
+    // length of all suboptions
+    for (OptionCollection::const_iterator it = options_.begin();
+         it != options_.end();
+         ++it) {
+        length += (*it).second->len();
+    }
+    return (length);
+}
+
+} // end of isc::dhcp namespace
+} // end of isc namespace