diff --git a/src/chatroom-info.cpp b/src/chatroom-info.cpp
new file mode 100644
index 0000000..2b23719
--- /dev/null
+++ b/src/chatroom-info.cpp
@@ -0,0 +1,136 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil -*- */
+/*
+ * Copyright (c) 2013, Regents of the University of California
+ *                     Yingdi Yu
+ *
+ * BSD license, See the LICENSE file for more information
+ *
+ * Author: Mengjin Yan <jane.yan0129@gmail.com>
+ * Author: Yingdi Yu <yingdi@cs.ucla.edu>
+ */
+#include "chatroom-info.hpp"
+
+namespace chronos {
+
+ChatroomInfo::ChatroomInfo()
+{
+}
+
+ChatroomInfo::ChatroomInfo(const Block& chatroomWire)
+{
+  this->wireDecode(chatroomWire);
+}
+
+template<bool T>
+size_t
+ChatroomInfo::wireEncode(ndn::EncodingImpl<T>& block) const
+{
+  size_t totalLength = 0;
+
+  //Chatroom := CHATROOM-TYPE TLV-LENGTH
+  //              TrustModel
+  //              Participant+
+
+  //Participants
+  for (std::vector<Name>::const_reverse_iterator it = m_participants.rbegin();
+       it != m_participants.rend(); ++it) {
+    size_t entryLength = 0;
+
+    entryLength += it->wireEncode(block);
+    entryLength += block.prependVarNumber(entryLength);
+    entryLength += block.prependVarNumber(tlv::PARTICIPANT);
+    totalLength += entryLength;
+  }
+
+  //TrustModel
+  totalLength += prependNonNegativeIntegerBlock(block, tlv::TRUSTMODEL, m_trustModel);
+
+  //type = TYPE_CHATROOM;
+  totalLength += block.prependVarNumber(totalLength);
+  totalLength += block.prependVarNumber(tlv::CHATROOM);
+
+  return totalLength;
+}
+
+const Block&
+ChatroomInfo::wireEncode() const
+{
+  ndn::EncodingEstimator estimator;
+  size_t estimatedSize = wireEncode(estimator);
+
+  ndn::EncodingBuffer buffer(estimatedSize, 0);
+  wireEncode(buffer);
+
+  m_wire = buffer.block();
+  m_wire.parse();
+
+  return m_wire;
+}
+
+void
+ChatroomInfo::wireDecode(const Block& chatroomWire)
+{
+  m_wire = chatroomWire;
+  m_wire.parse();
+
+  m_participants.clear();
+
+  //Chatroom := CHATROOM-TYPE TLV-LENGTH
+  //              TrustModel
+  //              Participant+
+
+  if (m_wire.type() != tlv::CHATROOM)
+    throw Error("Unexpected TLV number when decoding chatroom packet");
+
+  Block::element_const_iterator i = m_wire.elements_begin();
+
+  //TrustModel
+  if (i == m_wire.elements_end() || i->type() != tlv::TRUSTMODEL)
+    throw Error("Missing TrustModel");
+  m_trustModel =
+      static_cast<TrustModel>(readNonNegativeInteger(*i));
+
+  ++i;
+
+  //Participants
+  for (; i != m_wire.elements_end() && i->type() == tlv::PARTICIPANT; ++i) {
+    Name name;
+    name.wireDecode(i->blockFromValue());
+    m_participants.push_back(name);
+  }
+  if (m_participants.empty())
+    throw Error("Missing Participant");
+  if (i != m_wire.elements_end()) {
+    throw Error("Unexpected element");
+  }
+}
+
+void
+ChatroomInfo::addParticipant(const Name& participant)
+{
+  m_wire.reset();
+  m_participants.push_back(participant);
+}
+
+void
+ChatroomInfo::addContact(const Name& contact)
+{
+  m_wire.reset();
+  m_contacts.push_back(contact);
+}
+
+void
+ChatroomInfo::setName(const Name::Component& name)
+{
+  m_wire.reset();
+  m_name = name;
+}
+
+void
+ChatroomInfo::setTrustModel(const TrustModel trustModel)
+{
+  m_wire.reset();
+  m_trustModel = trustModel;
+}
+
+} //namespace chronos