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diff --git a/demo/zrtptest.cpp b/demo/zrtptest.cpp
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+// Test ZRTP extension for ccRTP
+//
+// Copyright (C) 2008 Werner Dittmann <Werner.Dittmann@t-online.de>
+//
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation; either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+#include <cstdlib>
+#include <map>
+#include <libzrtpcpp/zrtpccrtp.h>
+#include <libzrtpcpp/ZrtpUserCallback.h>
+
+using namespace ost;
+using namespace std;
+using namespace GnuZrtpCodes;
+
+class PacketsPattern
+{
+public:
+ inline const InetHostAddress&
+ getDestinationAddress() const
+ { return destinationAddress; }
+
+ inline const tpport_t
+ getDestinationPort() const
+ { return destinationPort; }
+
+ uint32
+ getPacketsNumber() const
+ { return packetsNumber; }
+
+ uint32
+ getSsrc() const
+ { return 0xdeadbeef; }
+
+ const unsigned char*
+ getPacketData(uint32 i)
+ { return data[i%2]; }
+
+ const size_t
+ getPacketSize(uint32 i)
+ { return strlen((char*)data[i%2]) + 1 ; }
+
+private:
+ static const InetHostAddress destinationAddress;
+ static const uint16 destinationPort = 5002;
+ static const uint32 packetsNumber = 10;
+ static const uint32 packetsSize = 12;
+ static const unsigned char* data[];
+};
+
+const InetHostAddress PacketsPattern::destinationAddress =
+ InetHostAddress("localhost");
+
+const unsigned char* PacketsPattern::data[] = {
+ (unsigned char*)"0123456789\n",
+ (unsigned char*)"987654321\n"
+};
+
+PacketsPattern pattern;
+
+class ExtZrtpSession : public SymmetricZRTPSession {
+// ExtZrtpSession(InetMcastAddress& ima, tpport_t port) :
+// RTPSession(ima,port) {}
+//
+// ExtZrtpSession(InetHostAddress& ia, tpport_t port) :
+// RTPSession(ia,port) {}
+
+public:
+ ExtZrtpSession(uint32 ssrc, const InetHostAddress& ia) :
+ SingleThreadRTPSession(ssrc, ia){
+ cout << "Extended" << endl;
+ }
+
+ ExtZrtpSession(uint32 ssrc, const InetHostAddress& ia, tpport_t dataPort) :
+ SingleThreadRTPSession(ssrc, ia, dataPort) {
+ cout << "Extended" << endl;
+ }
+
+ ExtZrtpSession(const InetHostAddress& ia, tpport_t dataPort) :
+ SingleThreadRTPSession(ia, dataPort) {
+ cout << "Extended" << endl;
+ }
+
+ void onGotGoodbye(const SyncSource& source, const std::string& reason)
+ {
+ cout << "I got a Goodbye packet from "
+ << hex << (int)source.getID() << "@"
+ << dec
+ << source.getNetworkAddress() << ":"
+ << source.getControlTransportPort() << endl;
+ cout << " Goodbye reason: \"" << reason << "\"" << endl;
+ }
+ // redefined from QueueRTCPManager
+ void onGotRR(SyncSource& source, RecvReport& RR, uint8 blocks)
+ {
+ SingleThreadRTPSession::onGotRR(source,RR,blocks);
+ cout << "I got an RR RTCP report from "
+ << hex << (int)source.getID() << "@"
+ << dec
+ << source.getNetworkAddress() << ":"
+ << source.getControlTransportPort() << endl;
+ }
+};
+
+
+/**
+ * SymmetricZRTPSession in non-security mode (RTPSession compatible).
+ *
+ * The next two classes show how to use <code>SymmetricZRTPSession</code>
+ * in the same way as <code>RTPSession</code>. This is straightforward,
+ * just don't do any configuration or initialization.
+ */
+class SendPacketTransmissionTest: public Thread, public TimerPort {
+public:
+ void
+ run() {
+ doTest();
+ }
+
+ int doTest() {
+ // should be valid?
+ //RTPSession tx();
+ ExtZrtpSession tx(pattern.getSsrc(), InetHostAddress("localhost"));
+// SymmetricZRTPSession tx(pattern.getSsrc(), InetHostAddress("localhost"));
+ tx.setSchedulingTimeout(10000);
+ tx.setExpireTimeout(1000000);
+
+ tx.startRunning();
+
+ tx.setPayloadFormat(StaticPayloadFormat(sptPCMU));
+ if (!tx.addDestination(pattern.getDestinationAddress(),
+ pattern.getDestinationPort()) ) {
+ return 1;
+ }
+
+ // 2 packets per second (packet duration of 500ms)
+ uint32 period = 500;
+ uint16 inc = tx.getCurrentRTPClockRate()/2;
+ TimerPort::setTimer(period);
+ uint32 i;
+ for (i = 0; i < pattern.getPacketsNumber(); i++ ) {
+ tx.putData(i*inc,
+ pattern.getPacketData(i),
+ pattern.getPacketSize(i));
+ cout << "Sent some data: " << i << endl;
+ Thread::sleep(TimerPort::getTimer());
+ TimerPort::incTimer(period);
+ }
+ tx.putData(i*inc, (unsigned char*)"exit", 5);
+ Thread::sleep(TimerPort::getTimer());
+ return 0;
+ }
+};
+
+
+class RecvPacketTransmissionTest: public Thread {
+public:
+ void
+ run() {
+ doTest();
+ }
+
+ int
+ doTest() {
+ ExtZrtpSession rx(pattern.getSsrc()+1, pattern.getDestinationAddress(),
+ pattern.getDestinationPort());
+
+// SymmetricZRTPSession rx(pattern.getSsrc()+1, pattern.getDestinationAddress(),
+// pattern.getDestinationPort());
+ rx.setSchedulingTimeout(10000);
+ rx.setExpireTimeout(1000000);
+
+ rx.startRunning();
+ rx.setPayloadFormat(StaticPayloadFormat(sptPCMU));
+ // arbitrary number of loops to provide time to start transmitter
+ if (!rx.addDestination(pattern.getDestinationAddress(),
+ pattern.getDestinationPort()+2) ) {
+ return 1;
+ }
+ for ( int i = 0; i < 5000 ; i++ ) {
+ const AppDataUnit* adu;
+ while ( (adu = rx.getData(rx.getFirstTimestamp())) ) {
+ cerr << "got some data: " << adu->getData() << endl;
+ if (*adu->getData() == 'e') {
+ delete adu;
+ return 0;
+ }
+ delete adu;
+ }
+ Thread::sleep(70);
+ }
+ return 0;
+ }
+};
+
+
+/**
+ * SymmetricZRTPSession in security mode.
+ *
+ * The next two classes show how to use <code>SymmetricZRTPSession</code>
+ * using the standard ZRTP handshake an switching to encrypted (SRTP) mode.
+ * The application enables this by calling <code>initialize(...)</code>.
+ * Some embedded logging informs about the ZRTP processing.
+ */
+
+class ZrtpSendPacketTransmissionTest: public Thread, public TimerPort {
+public:
+ void
+ run() {
+ doTest();
+ }
+
+ int doTest() {
+ // should be valid?
+ //RTPSession tx();
+ ExtZrtpSession tx(pattern.getSsrc(), pattern.getDestinationAddress(),
+ pattern.getDestinationPort()+2);
+ tx.initialize("test_t.zid");
+
+ tx.setSchedulingTimeout(10000);
+ tx.setExpireTimeout(1000000);
+
+ tx.startRunning();
+
+ tx.setPayloadFormat(StaticPayloadFormat(sptPCMU));
+ if (!tx.addDestination(pattern.getDestinationAddress(),
+ pattern.getDestinationPort()) ) {
+ return 1;
+ }
+ tx.startZrtp();
+ // 2 packets per second (packet duration of 500ms)
+ uint32 period = 500;
+ uint16 inc = tx.getCurrentRTPClockRate()/2;
+ TimerPort::setTimer(period);
+ uint32 i;
+ for (i = 0; i < pattern.getPacketsNumber(); i++ ) {
+ tx.putData(i*inc,
+ pattern.getPacketData(i),
+ pattern.getPacketSize(i));
+ cout << "Sent some data: " << i << endl;
+ Thread::sleep(TimerPort::getTimer());
+ TimerPort::incTimer(period);
+ }
+ tx.putData(i*inc, (unsigned char*)"exit", 5);
+ Thread::sleep(200);
+ return 0;
+ }
+};
+
+class ZrtpRecvPacketTransmissionTest: public Thread {
+public:
+ void
+ run() {
+ doTest();
+ }
+
+ int
+ doTest() {
+ ExtZrtpSession rx(pattern.getSsrc()+1, pattern.getDestinationAddress(),
+ pattern.getDestinationPort());
+
+ rx.initialize("test_r.zid");
+
+ rx.setSchedulingTimeout(10000);
+ rx.setExpireTimeout(1000000);
+
+ rx.startRunning();
+ rx.setPayloadFormat(StaticPayloadFormat(sptPCMU));
+ // arbitrary number of loops to provide time to start transmitter
+ if (!rx.addDestination(pattern.getDestinationAddress(),
+ pattern.getDestinationPort()+2) ) {
+ return 1;
+ }
+ rx.startZrtp();
+ for ( int i = 0; i < 5000 ; i++ ) {
+ const AppDataUnit* adu;
+ while ( (adu = rx.getData(rx.getFirstTimestamp())) ) {
+ cerr << "got some data: " << adu->getData() << endl;
+ if (*adu->getData() == 'e') {
+ delete adu;
+ return 0;
+ }
+ delete adu;
+ }
+ Thread::sleep(70);
+ }
+ return 0;
+ }
+};
+
+/**
+ * Simple User Callback class
+ *
+ * This class overwrite some methods from ZrtpUserCallback to get information
+ * about ZRTP processing and information about ZRTP results. The standard
+ * implementation of this class just perform return, thus effectively
+ * supressing any callback or trigger.
+ */
+class MyUserCallback: public ZrtpUserCallback {
+
+ static map<int32, std::string*> infoMap;
+ static map<int32, std::string*> warningMap;
+ static map<int32, std::string*> severeMap;
+ static map<int32, std::string*> zrtpMap;
+
+ static bool initialized;
+
+ SymmetricZRTPSession* session;
+ public:
+ MyUserCallback(SymmetricZRTPSession* s) {
+ session = s;
+ if (initialized) {
+ return;
+ }
+ infoMap.insert(pair<int32, std::string*>(InfoHelloReceived, new string("Hello received, preparing a Commit")));
+ infoMap.insert(pair<int32, std::string*>(InfoCommitDHGenerated, new string("Commit: Generated a public DH key")));
+ infoMap.insert(pair<int32, std::string*>(InfoRespCommitReceived, new string("Responder: Commit received, preparing DHPart1")));
+ infoMap.insert(pair<int32, std::string*>(InfoDH1DHGenerated, new string("DH1Part: Generated a public DH key")));
+ infoMap.insert(pair<int32, std::string*>(InfoInitDH1Received, new string("Initiator: DHPart1 received, preparing DHPart2")));
+ infoMap.insert(pair<int32, std::string*>(InfoRespDH2Received, new string("Responder: DHPart2 received, preparing Confirm1")));
+ infoMap.insert(pair<int32, std::string*>(InfoInitConf1Received, new string("Initiator: Confirm1 received, preparing Confirm2")));
+ infoMap.insert(pair<int32, std::string*>(InfoRespConf2Received, new string("Responder: Confirm2 received, preparing Conf2Ack")));
+ infoMap.insert(pair<int32, std::string*>(InfoRSMatchFound, new string("At least one retained secrets matches - security OK")));
+ infoMap.insert(pair<int32, std::string*>(InfoSecureStateOn, new string("Entered secure state")));
+ infoMap.insert(pair<int32, std::string*>(InfoSecureStateOff, new string("No more security for this session")));
+
+ warningMap.insert(pair<int32, std::string*>(WarningDHAESmismatch,
+ new string("Commit contains an AES256 cipher but does not offer a Diffie-Helman 4096")));
+ warningMap.insert(pair<int32, std::string*>(WarningGoClearReceived, new string("Received a GoClear message")));
+ warningMap.insert(pair<int32, std::string*>(WarningDHShort,
+ new string("Hello offers an AES256 cipher but does not offer a Diffie-Helman 4096")));
+ warningMap.insert(pair<int32, std::string*>(WarningNoRSMatch, new string("No retained secret matches - verify SAS")));
+ warningMap.insert(pair<int32, std::string*>(WarningCRCmismatch, new string("Internal ZRTP packet checksum mismatch - packet dropped")));
+ warningMap.insert(pair<int32, std::string*>(WarningSRTPauthError, new string("Dropping packet because SRTP authentication failed!")));
+ warningMap.insert(pair<int32, std::string*>(WarningSRTPreplayError, new string("Dropping packet because SRTP replay check failed!")));
+
+ severeMap.insert(pair<int32, std::string*>(SevereHelloHMACFailed, new string("Hash HMAC check of Hello failed!")));
+ severeMap.insert(pair<int32, std::string*>(SevereCommitHMACFailed, new string("Hash HMAC check of Commit failed!")));
+ severeMap.insert(pair<int32, std::string*>(SevereDH1HMACFailed, new string("Hash HMAC check of DHPart1 failed!")));
+ severeMap.insert(pair<int32, std::string*>(SevereDH2HMACFailed, new string("Hash HMAC check of DHPart2 failed!")));
+ severeMap.insert(pair<int32, std::string*>(SevereCannotSend, new string("Cannot send data - connection or peer down?")));
+ severeMap.insert(pair<int32, std::string*>(SevereProtocolError, new string("Internal protocol error occured!")));
+ severeMap.insert(pair<int32, std::string*>(SevereNoTimer, new string("Cannot start a timer - internal resources exhausted?")));
+ severeMap.insert(pair<int32, std::string*>(SevereTooMuchRetries,
+ new string("Too much retries during ZRTP negotiation - connection or peer down?")));
+
+ zrtpMap.insert(pair<int32, std::string*>(MalformedPacket, new string("Malformed packet (CRC OK, but wrong structure)")));
+ zrtpMap.insert(pair<int32, std::string*>(CriticalSWError, new string("Critical software error")));
+ zrtpMap.insert(pair<int32, std::string*>(UnsuppZRTPVersion, new string("Unsupported ZRTP version")));
+ zrtpMap.insert(pair<int32, std::string*>(HelloCompMismatch, new string("Hello components mismatch")));
+ zrtpMap.insert(pair<int32, std::string*>(UnsuppHashType, new string("Hash type not supported")));
+ zrtpMap.insert(pair<int32, std::string*>(UnsuppCiphertype, new string("Cipher type not supported")));
+ zrtpMap.insert(pair<int32, std::string*>(UnsuppPKExchange, new string("Public key exchange not supported")));
+ zrtpMap.insert(pair<int32, std::string*>(UnsuppSRTPAuthTag, new string("SRTP auth. tag not supported")));
+ zrtpMap.insert(pair<int32, std::string*>(UnsuppSASScheme, new string("SAS scheme not supported")));
+ zrtpMap.insert(pair<int32, std::string*>(NoSharedSecret, new string("No shared secret available, DH mode required")));
+ zrtpMap.insert(pair<int32, std::string*>(DHErrorWrongPV, new string("DH Error: bad pvi or pvr ( == 1, 0, or p-1)")));
+ zrtpMap.insert(pair<int32, std::string*>(DHErrorWrongHVI, new string("DH Error: hvi != hashed data")));
+ zrtpMap.insert(pair<int32, std::string*>(SASuntrustedMiTM, new string("Received relayed SAS from untrusted MiTM")));
+ zrtpMap.insert(pair<int32, std::string*>(ConfirmHMACWrong, new string("Auth. Error: Bad Confirm pkt HMAC")));
+ zrtpMap.insert(pair<int32, std::string*>(NonceReused, new string("Nonce reuse")));
+ zrtpMap.insert(pair<int32, std::string*>(EqualZIDHello, new string("Equal ZIDs in Hello")));
+ zrtpMap.insert(pair<int32, std::string*>(GoCleatNotAllowed, new string("GoClear packet received, but not allowed")));
+
+ initialized = true;
+ }
+
+ void showMessage(GnuZrtpCodes::MessageSeverity sev, int32_t subCode) {
+ string* msg;
+ if (sev == Info) {
+ msg = infoMap[subCode];
+ if (msg != NULL) {
+ cout << *msg << endl;
+ }
+ }
+ if (sev == Warning) {
+ msg = warningMap[subCode];
+ if (msg != NULL) {
+ cout << *msg << endl;
+ }
+ }
+ if (sev == Severe) {
+ msg = severeMap[subCode];
+ if (msg != NULL) {
+ cout << *msg << endl;
+ }
+ }
+ if (sev == ZrtpError) {
+ if (subCode < 0) { // received an error packet from peer
+ subCode *= -1;
+ cout << "Received error packet: ";
+ }
+ else {
+ cout << "Sent error packet: ";
+ }
+ msg = zrtpMap[subCode];
+ if (msg != NULL) {
+ cout << *msg << endl;
+ }
+ }
+ }
+
+ void zrtpNegotiationFailed(GnuZrtpCodes::MessageSeverity sev, int32_t subCode) {
+ string* msg;
+ if (sev == ZrtpError) {
+ if (subCode < 0) { // received an error packet from peer
+ subCode *= -1;
+ cout << "Received error packet: ";
+ }
+ else {
+ cout << "Sent error packet: ";
+ }
+ msg = zrtpMap[subCode];
+ if (msg != NULL) {
+ cout << *msg << endl;
+ }
+ }
+ else {
+ msg = severeMap[subCode];
+ cout << *msg << endl;
+ }
+ }
+
+ void secureOn(std::string cipher) {
+ cout << "Using cipher:" << cipher << endl;
+ }
+
+ void showSAS(std::string sas, bool verified) {
+ cout << "SAS is: " << sas << endl;
+
+ }
+};
+
+map<int32, std::string*>MyUserCallback::infoMap;
+map<int32, std::string*>MyUserCallback::warningMap;
+map<int32, std::string*>MyUserCallback::severeMap;
+map<int32, std::string*>MyUserCallback::zrtpMap;
+
+bool MyUserCallback::initialized = false;
+
+/**
+ * SymmetricZRTPSession in security mode and using a callback class.
+ *
+ * The next two classes show how to use <code>SymmetricZRTPSession</code>
+ * using the standard ZRTP handshake an switching to encrypted (SRTP) mode.
+ * The application enables this by calling <code>initialize(...)</code>.
+ * In addition the application sets a callback class (see above). ZRTP calls
+ * the methods of the callback class and the application may implement
+ * appropriate methods to deal with these triggers.
+ */
+
+class
+ZrtpSendPacketTransmissionTestCB : public Thread, public TimerPort
+{
+public:
+ void
+ run()
+ {
+ doTest();
+ }
+
+ int doTest()
+ {
+ // should be valid?
+ //RTPSession tx();
+ ExtZrtpSession tx(/*pattern.getSsrc(),*/ pattern.getDestinationAddress(),
+ pattern.getDestinationPort()+2);
+ tx.initialize("test_t.zid");
+ // At this point the Hello hash is available. See ZRTP specification
+ // chapter 9.1 for further information when an how to use the Hello
+ // hash.
+ cout << "TX Hello hash: " << tx.getHelloHash() << endl;
+ cout << "TX Hello hash length: " << tx.getHelloHash().length() << endl;
+
+ tx.setUserCallback(new MyUserCallback(&tx));
+
+ tx.setSchedulingTimeout(10000);
+ tx.setExpireTimeout(1000000);
+
+ tx.startRunning();
+
+ tx.setPayloadFormat(StaticPayloadFormat(sptPCMU));
+ if (!tx.addDestination(pattern.getDestinationAddress(),
+ pattern.getDestinationPort()) ) {
+ return 1;
+ }
+ tx.startZrtp();
+
+ // 2 packets per second (packet duration of 500ms)
+ uint32 period = 500;
+ uint16 inc = tx.getCurrentRTPClockRate()/2;
+ TimerPort::setTimer(period);
+ uint32 i;
+ for (i = 0; i < pattern.getPacketsNumber(); i++ ) {
+ tx.putData(i*inc,
+ pattern.getPacketData(i),
+ pattern.getPacketSize(i));
+ cout << "Sent some data: " << i << endl;
+ Thread::sleep(TimerPort::getTimer());
+ TimerPort::incTimer(period);
+ }
+ tx.putData(i*inc, (unsigned char*)"exit", 5);
+ Thread::sleep(TimerPort::getTimer());
+ return 0;
+ }
+};
+
+
+class
+ZrtpRecvPacketTransmissionTestCB: public Thread
+{
+public:
+ void
+ run() {
+ doTest();
+ }
+
+ int
+ doTest() {
+ ExtZrtpSession rx( /*pattern.getSsrc()+1,*/ pattern.getDestinationAddress(),
+ pattern.getDestinationPort());
+
+ rx.initialize("test_r.zid");
+ // At this point the Hello hash is available. See ZRTP specification
+ // chapter 9.1 for further information when an how to use the Hello
+ // hash.
+ cout << "RX Hello hash: " << rx.getHelloHash() << endl;
+ cout << "RX Hello hash length: " << rx.getHelloHash().length() << endl;
+
+ rx.setUserCallback(new MyUserCallback(&rx));
+
+ rx.setSchedulingTimeout(10000);
+ rx.setExpireTimeout(1000000);
+
+ rx.startRunning();
+ rx.setPayloadFormat(StaticPayloadFormat(sptPCMU));
+ // arbitrary number of loops to provide time to start transmitter
+ if (!rx.addDestination(pattern.getDestinationAddress(),
+ pattern.getDestinationPort()+2) ) {
+ return 1;
+ }
+ rx.startZrtp();
+
+ for ( int i = 0; i < 5000 ; i++ ) {
+ const AppDataUnit* adu;
+ while ( (adu = rx.getData(rx.getFirstTimestamp())) ) {
+ cerr << "got some data: " << adu->getData() << endl;
+ if (*adu->getData() == 'e') {
+ delete adu;
+ return 0;
+ }
+ delete adu;
+ }
+ Thread::sleep(500);
+ }
+ return 0;
+ }
+};
+
+
+int main(int argc, char *argv[])
+{
+ int result = 0;
+ bool send = false;
+ bool recv = false;
+
+ char c;
+
+ /* check args */
+ while (1) {
+ c = getopt(argc, argv, "rs");
+ if (c == -1) {
+ break;
+ }
+ switch (c) {
+ case 'r':
+ recv = true;
+ break;
+ case 's':
+ send = true;
+ break;
+ default:
+ cerr << "Wrong Arguments, only -s and -r are accepted" << endl;
+ }
+ }
+
+ if (send || recv) {
+ if (send) {
+ cout << "Running as sender" << endl;
+ }
+ else {
+ cout << "Running as receiver" << endl;
+ }
+ }
+ else {
+ cerr << "No send or receive argument specificied" << endl;
+ exit(1);
+ }
+
+ // accept as parameter if must run as --send or --recv
+
+#if 0
+ RecvPacketTransmissionTest *rx;
+ SendPacketTransmissionTest *tx;
+
+ // run several tests in parallel threads
+ if ( send ) {
+ tx = new SendPacketTransmissionTest();
+ tx->start();
+ tx->join();
+ } else if ( recv ) {
+ rx = new RecvPacketTransmissionTest();
+ rx->start();
+ rx->join();
+ }
+//#endif
+//#if 0
+ ZrtpRecvPacketTransmissionTest *zrx;
+ ZrtpSendPacketTransmissionTest *ztx;
+
+ if ( send ) {
+ ztx = new ZrtpSendPacketTransmissionTest();
+ ztx->start();
+ ztx->join();
+ } else if ( recv ) {
+ zrx = new ZrtpRecvPacketTransmissionTest();
+ zrx->start();
+ zrx->join();
+ }
+#endif
+ ZrtpRecvPacketTransmissionTestCB *zrxcb;
+ ZrtpSendPacketTransmissionTestCB *ztxcb;
+
+ if ( send ) {
+ ztxcb = new ZrtpSendPacketTransmissionTestCB();
+ ztxcb->start();
+ ztxcb->join();
+ } else if ( recv ) {
+ zrxcb = new ZrtpRecvPacketTransmissionTestCB();
+ zrxcb->start();
+ zrxcb->join();
+ }
+
+ exit(result);
+}
+
+/** EMACS **
+ * Local variables:
+ * mode: c++
+ * c-default-style: ellemtel
+ * c-basic-offset: 4
+ * End:
+ */