ast_h323.cpp

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		H323_G711Capability *g711aCap;
		lastcap = localCapabilities.SetCapability(0, 0, g711aCap = new H323_G711Capability(H323_G711Capability::ALaw));
		g711aCap->SetTxFramesInPacket(g711Frames);
	}

	lastcap++;
	lastcap = localCapabilities.SetCapability(0, lastcap, new H323_UserInputCapability(H323_UserInputCapability::HookFlashH245));

	lastcap++;
	mode = dtmfMode;
	if (dtmfMode == H323_DTMF_INBAND) {
		localCapabilities.SetCapability(0, lastcap, new H323_UserInputCapability(H323_UserInputCapability::SignalToneH245));
		sendUserInputMode = SendUserInputAsTone;
	} else {
		localCapabilities.SetCapability(0, lastcap, new H323_UserInputCapability(H323_UserInputCapability::SignalToneRFC2833));
		sendUserInputMode = SendUserInputAsInlineRFC2833;
	}

	if (h323debug) {
		cout <<  "Allowed Codecs:\n\t" << setprecision(2) << localCapabilities << endl;
	}
}

/* MyH323_ExternalRTPChannel */
MyH323_ExternalRTPChannel::MyH323_ExternalRTPChannel(MyH323Connection & connection,
						     const H323Capability & capability,
                                                     Directions direction,
                                                     unsigned id)
 : H323_ExternalRTPChannel::H323_ExternalRTPChannel(connection, capability, direction, id)
{   
	struct rtp_info *info;

	/* Determine the Local (A side) IP Address and port */
	info = on_external_rtp_create(connection.GetCallReference(), (const char *)connection.GetCallToken()); 
	if (!info) {
		cout << "\tERROR: on_external_rtp_create failure" << endl;
		return;
	} else {
		localIpAddr = info->addr;
		localPort = info->port;
		/* tell the H.323 stack  */ 
		SetExternalAddress(H323TransportAddress(localIpAddr, localPort), H323TransportAddress(localIpAddr, localPort + 1));
		/* clean up allocated memory */
		free(info);
	}

	/* Get the payload code	*/
	OpalMediaFormat format(capability.GetFormatName(), FALSE);
	payloadCode = format.GetPayloadType();
} 

MyH323_ExternalRTPChannel::~MyH323_ExternalRTPChannel() 
{
	if (h323debug) {
		cout << "\tExternalRTPChannel Destroyed" << endl;
	}
}

BOOL MyH323_ExternalRTPChannel::Start(void)
{
	/* Call ancestor first */
	if (!H323_ExternalRTPChannel::Start()) {
		return FALSE;
	}

	if (h323debug) {
		cout << "\t\tExternal RTP Session Starting" << endl;
		cout << "\t\tRTP channel id " << sessionID << " parameters:" << endl;
	}

	/* Collect the remote information */
	H323_ExternalRTPChannel::GetRemoteAddress(remoteIpAddr, remotePort);

	if (h323debug) {
		cout << "\t\t-- remoteIpAddress: " << remoteIpAddr << endl;
		cout << "\t\t-- remotePort: " << remotePort << endl;
		cout << "\t\t-- ExternalIpAddress: " <<  localIpAddr << endl;
		cout << "\t\t-- ExternalPort: " << localPort << endl;
	}
	/* Notify Asterisk of remote RTP information */
	on_start_rtp_channel(connection.GetCallReference(), (const char *)remoteIpAddr.AsString(), remotePort, 
		(const char *)connection.GetCallToken(), (int)payloadCode);
	return TRUE;
}

BOOL MyH323_ExternalRTPChannel::OnReceivedAckPDU(const H245_H2250LogicalChannelAckParameters & param)
{
	PIPSocket::Address remoteIpAddress;
	WORD remotePort;

	if (h323debug) {
		cout << "	MyH323_ExternalRTPChannel::OnReceivedAckPDU" << endl;
	}

	if (H323_ExternalRTPChannel::OnReceivedAckPDU(param)) {
		GetRemoteAddress(remoteIpAddress, remotePort);
		if (h323debug) {
			cout << "		-- remoteIpAddress: " << remoteIpAddress << endl;
			cout << "		-- remotePort: " << remotePort << endl;
		}
		on_start_rtp_channel(connection.GetCallReference(), (const char *)remoteIpAddress.AsString(),
				remotePort, (const char *)connection.GetCallToken(), (int)payloadCode);
		return TRUE;
	}
	return FALSE;
}

/** IMPLEMENTATION OF C FUNCTIONS */

/**
 * The extern "C" directive takes care for 
 * the ANSI-C representation of linkable symbols 
 */

extern "C" {

int h323_end_point_exist(void)
{
	if (!endPoint) {
		return 0;
	}
	return 1;
}
    
void h323_end_point_create(void)
{
	channelsOpen = 0;
	logstream = new PAsteriskLog();
	localProcess = new MyProcess();	
	localProcess->Main();
}

void h323_gk_urq(void)
{
	if (!h323_end_point_exist()) {
		cout << " ERROR: [h323_gk_urq] No Endpoint, this is bad" << endl;
		return;
	}	
	endPoint->RemoveGatekeeper();
}

void h323_debug(int flag, unsigned level)
{
	if (flag) {
		PTrace:: SetLevel(level); 
	} else { 
		PTrace:: SetLevel(0); 
	}
}
	
/** Installs the callback functions on behalf of the PBX application  */
void h323_callback_register(setup_incoming_cb  	ifunc,
			    setup_outbound_cb  	sfunc,
 			    on_rtp_cb   	rtpfunc,
			    start_rtp_cb   	lfunc,
 			    clear_con_cb	clfunc,
 			    chan_ringing_cb     rfunc,
			    con_established_cb 	efunc,
 			    send_digit_cb	dfunc,
 			    answer_call_cb	acfunc,
			    progress_cb		pgfunc,
			    rfc2833_cb		dtmffunc,
			    hangup_cb		hangupfunc,
			    setcapabilities_cb	capabilityfunc)
{
	on_incoming_call = ifunc;
	on_outgoing_call = sfunc;
	on_external_rtp_create = rtpfunc;
	on_start_rtp_channel = lfunc;
	on_connection_cleared = clfunc;
	on_chan_ringing = rfunc;
	on_connection_established = efunc;
	on_send_digit = dfunc;
	on_answer_call = acfunc;
	on_progress = pgfunc;
	on_set_rfc2833_payload = dtmffunc;
	on_hangup = hangupfunc;
	on_setcapabilities = capabilityfunc;
}

/**
 * Add capability to the capability table of the end point. 
 */
int h323_set_capabilities(const char *token, int cap, int dtmfMode)
{
	MyH323Connection *conn;

	if (!h323_end_point_exist()) {
		cout << " ERROR: [h323_set_capablities] No Endpoint, this is bad" << endl;
		return 1;
	}
	if (!token || !*token) {
		cout << " ERROR: [h323_set_capabilities] Invalid call token specified." << endl;
		return 1;
	}

	PString myToken(token);
	conn = (MyH323Connection *)endPoint->FindConnectionWithLock(myToken);
	if (!conn) {
		cout << " ERROR: [h323_set_capabilities] Unable to find connection " << token << endl;
		return 1;
	}
	conn->SetCapabilities(cap, dtmfMode);
	conn->Unlock();

	return 0;
}

/** Start the H.323 listener */
int h323_start_listener(int listenPort, struct sockaddr_in bindaddr)
{
	
	if (!h323_end_point_exist()) {
		cout << "ERROR: [h323_start_listener] No Endpoint, this is bad!" << endl;
		return 1;
	}
	
	PIPSocket::Address interfaceAddress(bindaddr.sin_addr);
	if (!listenPort) {
		listenPort = 1720;
	}
	/** H.323 listener */  
	H323ListenerTCP *tcpListener;
	tcpListener = new H323ListenerTCP(*endPoint, interfaceAddress, (WORD)listenPort);
	if (!endPoint->StartListener(tcpListener)) {
		cout << "ERROR: Could not open H.323 listener port on " << ((H323ListenerTCP *) tcpListener)->GetListenerPort() << endl;
		delete tcpListener;
		return 1;
		
	}
	cout << "  == H.323 listener started" << endl;
	return 0;
};
 
int h323_set_alias(struct oh323_alias *alias)
{
	char *p;
	char *num;
	PString h323id(alias->name);
	PString e164(alias->e164);
	char *prefix;
	
	if (!h323_end_point_exist()) {
		cout << "ERROR: [h323_set_alias] No Endpoint, this is bad!" << endl;
		return 1;
	}

	cout << "== Adding alias \"" << h323id << "\" to endpoint" << endl;
	endPoint->AddAliasName(h323id);	
	endPoint->RemoveAliasName(localProcess->GetUserName());

	if (!e164.IsEmpty()) {
		cout << "== Adding E.164 \"" << e164 << "\" to endpoint" << endl;
		endPoint->AddAliasName(e164);
	}
	if (strlen(alias->prefix)) {
		p = prefix = strdup(alias->prefix);
		while((num = strsep(&p, ",")) != (char *)NULL) {
			cout << "== Adding Prefix \"" << num << "\" to endpoint" << endl;
			endPoint->SupportedPrefixes += PString(num);
			endPoint->SetGateway();
		}
		if (prefix)
			free(prefix);
	}
	return 0;
}

void h323_set_id(char *id)
{
	PString h323id(id);

	if (h323debug) {
		cout << "  == Using '" << h323id << "' as our H.323ID for this call" << endl;
	}
	/* EVIL HACK */
	endPoint->SetLocalUserName(h323id);
}

void h323_show_tokens(void)
{
	cout << "Current call tokens: " << setprecision(2) << endPoint->GetAllConnections() << endl;
}

/** Establish Gatekeeper communiations, if so configured, 
  *	register aliases for the H.323 endpoint to respond to.
  */
int h323_set_gk(int gatekeeper_discover, char *gatekeeper, char *secret)
{
	PString gkName = PString(gatekeeper);
	PString pass = PString(secret);
	H323TransportUDP *rasChannel;

	if (!h323_end_point_exist()) {
		cout << "ERROR: [h323_set_gk] No Endpoint, this is bad!" << endl;
		return 1;
	}

	if (!gatekeeper) {
		cout << "Error: Gatekeeper cannot be NULL" << endl;
		return 1;
	}
	if (strlen(secret)) {
		endPoint->SetGatekeeperPassword(pass);
	}
	if (gatekeeper_discover) {
		/* discover the gk using multicast */
		if (endPoint->DiscoverGatekeeper(new H323TransportUDP(*endPoint))) {
			cout << "== Using " << (endPoint->GetGatekeeper())->GetName() << " as our Gatekeeper." << endl;
		} else {
			cout << "Warning: Could not find a gatekeeper." << endl;
			return 1;
		}	
	} else {
		rasChannel = new H323TransportUDP(*endPoint);

		if (!rasChannel) {
			cout << "Error: No RAS Channel, this is bad" << endl;
			return 1;
		}
		if (endPoint->SetGatekeeper(gkName, rasChannel)) {
			cout << "== Using " << (endPoint->GetGatekeeper())->GetName() << " as our Gatekeeper." << endl;
		} else {
			cout << "Error registering with gatekeeper \"" << gkName << "\". " << endl;
			/* XXX Maybe we should fire a new thread to attempt to re-register later and not kill asterisk here? */
			return 1;
		}
	}
	return 0;
}

/** Send a DTMF tone over the H323Connection with the
  * specified token.
  */
void h323_send_tone(const char *call_token, char tone)
{
	if (!h323_end_point_exist()) {
		cout << "ERROR: [h323_send_tone] No Endpoint, this is bad!" << endl;
		return;
	}
	PString token = PString(call_token);
	endPoint->SendUserTone(token, tone);
}

/** Make a call to the remote endpoint.
  */
int h323_make_call(char *dest, call_details_t *cd, call_options_t *call_options)
{
	int res;
	PString	token;
	PString	host(dest);

	if (!h323_end_point_exist()) {
		return 1;
	}

	res = endPoint->MakeCall(host, token, &cd->call_reference, call_options);
	memcpy((char *)(cd->call_token), (const unsigned char *)token, token.GetLength());
	return res;
};

int h323_clear_call(const char *call_token, int cause)
{
	H225_ReleaseCompleteReason dummy;
	H323Connection::CallEndReason r = H323Connection::EndedByLocalUser;
	MyH323Connection *connection;
	const PString currentToken(call_token);

	if (!h323_end_point_exist()) {
		return 1;
	}

	if (cause) {
		r = H323TranslateToCallEndReason((Q931::CauseValues)(cause), dummy);
	}

	connection = (MyH323Connection *)endPoint->FindConnectionWithLock(currentToken);
	if (connection) {
		connection->SetCause(cause);
		connection->SetCallEndReason(r);
		connection->Unlock();
	}
	endPoint->ClearCall(currentToken, r);
	return 0;
};

/* Send Alerting PDU to H.323 caller */
int h323_send_alerting(const char *token)
{
        const PString currentToken(token);
        H323Connection * connection;

        if (h323debug) {
        	cout << "\tSending alerting\n" << endl;
        }
        connection = endPoint->FindConnectionWithLock(currentToken);
        if (!connection) {
                cout << "No connection found for " << token << endl;
                return -1;
        }
        connection->AnsweringCall(H323Connection::AnswerCallPending);
        connection->Unlock();
        return 0; 

}

/* Send Progress PDU to H.323 caller */
int h323_send_progress(const char *token)
{
        const PString currentToken(token);
        H323Connection * connection;

        connection = endPoint->FindConnectionWithLock(currentToken);
        if (!connection) {
                cout << "No connection found for " << token << endl;
                return -1;
        }
        connection->AnsweringCall(H323Connection::AnswerCallDeferredWithMedia);
        connection->Unlock();
        return 0;  
}

/** This function tells the h.323 stack to either 
    answer or deny an incoming call  */
int h323_answering_call(const char *token, int busy) 
{
	const PString currentToken(token);
	H323Connection * connection;
	
	connection = endPoint->FindConnectionWithLock(currentToken);
	
	if (!connection) {
		cout << "No connection found for " << token << endl;
		return -1;
	}
	if (!busy) {
		if (h323debug) {
			cout << "\tAnswering call " << token << endl;
		}
		connection->AnsweringCall(H323Connection::AnswerCallNow);
	} else {
		if (h323debug) {
			cout << "\tdenying call " << token << endl;
		}
		connection->AnsweringCall(H323Connection::AnswerCallDenied);
	}
	connection->Unlock();
	return 0;
}

int h323_show_codec(int fd, int argc, char *argv[])
{
	cout <<  "Allowed Codecs:\n\t" << setprecision(2) << endPoint->GetCapabilities() << endl;
	return 0;
}

int h323_soft_hangup(const char *data)
{
	PString token(data);
	BOOL result;
	cout << "Soft hangup" << endl;	
	result = endPoint->ClearCall(token);	
	return result;
}

/* alas, this doesn't work :(   */
void h323_native_bridge(const char *token, const char *them, char *capability)
{
	H323Channel *channel;
	MyH323Connection *connection = (MyH323Connection *)endPoint->FindConnectionWithLock(token);
	
	if (!connection) {
		cout << "ERROR: No connection found, this is bad\n";
		return;
	}

	cout << "Native Bridge:  them [" << them << "]" << endl; 

	channel = connection->FindChannel(connection->sessionId, TRUE);
	connection->bridging = TRUE;
	connection->CloseLogicalChannelNumber(channel->GetNumber());
	
	connection->Unlock();
	return;

}

#undef cout
void h323_end_process(void)
{
	if (endPoint) {
		endPoint->ClearAllCalls();
		endPoint->RemoveListener(NULL);
		delete endPoint;
		endPoint = NULL;
	}
	if (localProcess) {
		delete localProcess;
		localProcess = NULL;
	}
	PTrace::SetLevel(0);
	PTrace::SetStream(&cout);
	if (logstream) {
		delete logstream;
		logstream = NULL;
	}
}

} /* extern "C" */