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diff --git a/data-ipa-cfg-mgr/hal/src/CtUpdateAmbassador.cpp b/data-ipa-cfg-mgr/hal/src/CtUpdateAmbassador.cpp
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+/*
+ * Copyright (c) 2017, The Linux Foundation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials provided
+ * with the distribution.
+ * * Neither the name of The Linux Foundation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#ifndef DBG
+ #define DBG false
+#endif /* DBG */
+#define LOG_TAG "IPAHALService/CtUpdateAmbassador"
+
+/* External Includes */
+#include <arpa/inet.h>
+#include <cutils/log.h>
+
+/* HIDL Includes */
+#include <android/hardware/tetheroffload/control/1.0/ITetheringOffloadCallback.h>
+
+/* Internal Includes */
+#include "CtUpdateAmbassador.h"
+
+/* Namespace pollution avoidance */
+using ::android::hardware::tetheroffload::control::V1_0::ITetheringOffloadCallback;
+using ::android::hardware::tetheroffload::control::V1_0::NetworkProtocol;
+using HALIpAddrPortPair = ::android::hardware::tetheroffload::control::V1_0::IPv4AddrPortPair;
+using HALNatTimeoutUpdate = ::android::hardware::tetheroffload::control::V1_0::NatTimeoutUpdate;
+
+using IpaIpAddrPortPair = ::IOffloadManager::ConntrackTimeoutUpdater::IpAddrPortPair;
+using IpaNatTimeoutUpdate = ::IOffloadManager::ConntrackTimeoutUpdater::NatTimeoutUpdate;
+using IpaL4Protocol = ::IOffloadManager::ConntrackTimeoutUpdater::L4Protocol;
+
+
+CtUpdateAmbassador::CtUpdateAmbassador(
+ const ::android::sp<ITetheringOffloadCallback>& cb) : mFramework(cb) {
+} /* CtUpdateAmbassador */
+
+void CtUpdateAmbassador::updateTimeout(IpaNatTimeoutUpdate in) {
+ if (DBG) {
+ ALOGD("updateTimeout(src={%#010X, %#04X}, dest={%#010X, %#04X}, Proto=%d)",
+ in.src.ipAddr, in.src.port, in.dst.ipAddr, in.dst.port,
+ in.proto);
+ }
+ HALNatTimeoutUpdate out;
+ if (!translate(in, out)) {
+ /* Cannot log the input outside of DBG flag because it contains sensitive
+ * information. This will lead to a two step debug if the information
+ * cannot be gleaned from IPACM logs. The other option is to improve this
+ * with the use of our local log. That would likely still be hard to
+ * instruct testers to collect logs, because, assuming timeout updates
+ * are numerous, it will overrun the ring quickly. Therefore, the tester
+ * would have to know the exact moment as issue occurred. Or we make the
+ * ring massive. This would lead to a significant memory overhead.
+ * Because of this overhead, we would likely not want to check in a change
+ * with it and once we provide a debug build for increasing buffer size,
+ * why not just define the DBG flag?
+ */
+ ALOGE("Failed to translate timeout event :(");
+ } else {
+ mFramework->updateTimeout(out);
+ }
+} /* updateTimeout */
+
+bool CtUpdateAmbassador::translate(IpaNatTimeoutUpdate in, HALNatTimeoutUpdate &out) {
+ return translate(in.src, out.src)
+ && translate(in.dst, out.dst)
+ && L4ToNetwork(in.proto, out.proto);
+} /* translate */
+
+bool CtUpdateAmbassador::translate(IpaIpAddrPortPair in, HALIpAddrPortPair& out) {
+ char ipAddrStr[INET_ADDRSTRLEN];
+
+ if (inet_ntop(AF_INET, &(in.ipAddr), ipAddrStr, INET_ADDRSTRLEN) == nullptr) {
+ /* errno would be valid here with EAFNOSUPPORT or ENOSPC, neither should really
+ * be possible in our scenario though.
+ */
+ return false;
+ }
+
+ out.addr = ipAddrStr;
+ out.port = in.port;
+
+ return true;
+} /* translate */
+
+bool CtUpdateAmbassador::L4ToNetwork(IpaL4Protocol in, NetworkProtocol &out) {
+ bool ret = false;
+ switch(in) {
+ case IpaL4Protocol::TCP:
+ ret = true;
+ out = NetworkProtocol::TCP;
+ break;
+ case IpaL4Protocol::UDP:
+ ret = true;
+ out = NetworkProtocol::UDP;
+ break;
+ default:
+ ret = false;
+ break;
+ }
+ return ret;
+} /* L4ToNetwork */