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asterisk/channels/h323/ast_h323.cxx

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#ifndef _GNU_SOURCE
#define _GNU_SOURCE
#endif
/*
* ast_h323.cpp
*
* OpenH323 Channel Driver for ASTERISK PBX.
* By Jeremy McNamara
* For The NuFone Network
*
* chan_h323 has been derived from code created by
* Michael Manousos and Mark Spencer
*
* This file is part of the chan_h323 driver for Asterisk
*
* chan_h323 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 2 of the License, or
* (at your option) any later version.
*
* chan_h323 is distributed 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* Version Info: $Id$
*/
#define VERSION(a,b,c) ((a)*10000+(b)*100+(c))
#include <arpa/inet.h>
#include <list>
#include <string>
#include <algorithm>
#include <ptlib.h>
#include <h323.h>
#include <h323pdu.h>
#include <h323neg.h>
#include <mediafmt.h>
/* H323 Plus */
#if VERSION(OPENH323_MAJOR, OPENH323_MINOR, OPENH323_BUILD) > VERSION(1,19,4)
#ifdef H323_H450
#include "h450/h4501.h"
#include "h450/h4504.h"
#include "h450/h45011.h"
#include "h450/h450pdu.h"
#endif
#ifdef H323_H460
#include <h460/h4601.h>
#endif
#else /* !H323 Plus */
#include <lid.h>
#ifdef H323_H450
#include "h4501.h"
#include "h4504.h"
#include "h45011.h"
#include "h450pdu.h"
#endif
#endif /* H323 Plus */
#include "compat_h323.h"
#include "asterisk.h"
#ifdef __cplusplus
extern "C" {
#endif
#include "asterisk/compat.h"
#include "asterisk/logger.h"
#include "asterisk/channel.h"
#include "asterisk/astobj.h"
#ifdef __cplusplus
}
#endif
#undef open
#undef close
#include "chan_h323.h"
#include "ast_h323.h"
#include "cisco-h225.h"
#include "caps_h323.h"
/* PWLIB_MAJOR renamed to PTLIB_MAJOR in 2.x.x */
#if (defined(PTLIB_MAJOR) || VERSION(PWLIB_MAJOR, PWLIB_MINOR, PWLIB_BUILD) >= VERSION(1,12,0))
#define SKIP_PWLIB_PIPE_BUG_WORKAROUND 1
#endif
///////////////////////////////////////////////
/* We have to have a PProcess running for the life of the instance to give
* h323plus a static instance of PProcess to get system information.
* This class is defined with PDECLARE_PROCESS(). See pprocess.h from pwlib.
*/
/* PWlib Required Components */
#if VERSION(OPENH323_MAJOR, OPENH323_MINOR, OPENH323_BUILD) > VERSION(1,19,4)
#define MAJOR_VERSION 1
#define MINOR_VERSION 19
#define BUILD_TYPE ReleaseCode
#define BUILD_NUMBER 6
#else
#define MAJOR_VERSION 1
#define MINOR_VERSION 0
#define BUILD_TYPE ReleaseCode
#define BUILD_NUMBER 0
#endif
const char *h323manufact = "The NuFone Networks";
const char *h323product = "H.323 Channel Driver for Asterisk";
PDECLARE_PROCESS(MyProcess,PProcess,h323manufact,h323product,MAJOR_VERSION,MINOR_VERSION,BUILD_TYPE,BUILD_NUMBER)
static MyProcess localProcess; // active for the life of the DLL
/* void MyProcess::Main()
{
}
*/
////////////////////////////////////////////////
/** Counter for the number of connections */
static int channelsOpen;
/**
* We assume that only one endPoint should exist.
* The application cannot run the h323_end_point_create() more than once
* FIXME: Singleton this, for safety
*/
static MyH323EndPoint *endPoint = NULL;
#ifndef SKIP_PWLIB_PIPE_BUG_WORKAROUND
static int _timerChangePipe[2];
#endif
static unsigned traceOptions = PTrace::Timestamp | PTrace::Thread | PTrace::FileAndLine;
class PAsteriskLog : public PObject, public iostream {
PCLASSINFO(PAsteriskLog, PObject);
public:
PAsteriskLog() : iostream(cout.rdbuf()) { init(&buffer); }
~PAsteriskLog() { flush(); }
private:
PAsteriskLog(const PAsteriskLog &) : iostream(cout.rdbuf()) { }
PAsteriskLog & operator=(const PAsteriskLog &) { return *this; }
class Buffer : public streambuf {
public:
virtual int overflow(int=EOF);
virtual int underflow();
virtual int sync();
PString string;
} buffer;
friend class Buffer;
};
static PAsteriskLog *logstream = NULL;
int PAsteriskLog::Buffer::overflow(int c)
{
if (pptr() >= epptr()) {
int ppos = pptr() - pbase();
char *newptr = string.GetPointer(string.GetSize() + 2000);
setp(newptr, newptr + string.GetSize() - 1);
pbump(ppos);
}
if (c != EOF) {
*pptr() = (char)c;
pbump(1);
}
return 0;
}
int PAsteriskLog::Buffer::underflow()
{
return EOF;
}
int PAsteriskLog::Buffer::sync()
{
char *str = ast_strdup(string);
char *s, *s1;
char c;
/* Pass each line with different ast_verbose() call */
for (s = str; s && *s; s = s1) {
s1 = strchr(s, '\n');
if (!s1)
s1 = s + strlen(s);
else
s1++;
c = *s1;
*s1 = '\0';
ast_verbose("%s", s);
*s1 = c;
}
ast_free(str);
string = PString();
char *base = string.GetPointer(2000);
setp(base, base + string.GetSize() - 1);
return 0;
}
static ostream &my_endl(ostream &os)
{
if (logstream) {
PTrace::SetOptions(traceOptions);
return PTrace::End(os);
}
return endl(os);
}
#define cout \
(logstream ? (PTrace::ClearOptions((unsigned)-1), PTrace::Begin(0, __FILE__, __LINE__)) : std::cout)
#define endl my_endl
void MyProcess::Main()
{
PTrace::Initialise(PTrace::GetLevel(), NULL, traceOptions);
PTrace::SetStream(logstream);
cout << " == Creating H.323 Endpoint" << endl;
if (endPoint) {
cout << " == ENDPOINT ALREADY CREATED" << endl;
return;
}
endPoint = new MyH323EndPoint();
/* Due to a bug in the H.323 recomendation/stack we should request a sane
amount of bandwidth from the GK - this function is ignored if not using a GK
We are requesting 128 (64k in each direction), which is the worst case codec. */
endPoint->SetInitialBandwidth(1280);
}
void PAssertFunc(const char *msg)
{
ast_log(LOG_ERROR, "%s\n", msg);
/* XXX: Probably we need to crash here */
}
/** MyH323EndPoint
*/
MyH323EndPoint::MyH323EndPoint()
: H323EndPoint()
{
/* Capabilities will be negotiated on per-connection basis */
capabilities.RemoveAll();
/* Reset call setup timeout to some more reasonable value than 1 minute */
signallingChannelCallTimeout = PTimeInterval(0, 0, 10); /* 10 minutes */
}
/** The fullAddress parameter is used directly in the MakeCall method so
* the General form for the fullAddress argument is :
* [alias@][transport$]host[:port]
* default values: alias = the same value as host.
* transport = ip.
* port = 1720.
*/
int MyH323EndPoint::MyMakeCall(const PString & dest, PString & token, void *_callReference, void *_opts)
{
PString fullAddress;
MyH323Connection * connection;
H323Transport *transport = NULL;
unsigned int *callReference = (unsigned int *)_callReference;
call_options_t *opts = (call_options_t *)_opts;
/* Determine whether we are using a gatekeeper or not. */
if (GetGatekeeper()) {
fullAddress = dest;
if (h323debug) {
cout << " -- Making call to " << fullAddress << " using gatekeeper." << endl;
}
} else {
fullAddress = dest;
if (h323debug) {
cout << " -- Making call to " << fullAddress << " without gatekeeper." << endl;
}
/* Use bindaddr for outgoing calls too if we don't use gatekeeper */
if (listeners.GetSize() > 0) {
H323TransportAddress taddr = listeners[0].GetTransportAddress();
PIPSocket::Address addr;
WORD port;
if (taddr.GetIpAndPort(addr, port)) {
/* Create own transport for specific addresses only */
if (addr) {
if (h323debug)
cout << "Using " << addr << " for outbound call" << endl;
transport = new MyH323TransportTCP(*this, addr);
if (!transport)
cout << "Unable to create transport for outgoing call" << endl;
}
} else
cout << "Unable to get address and port" << endl;
}
}
if (!(connection = (MyH323Connection *)H323EndPoint::MakeCallLocked(fullAddress, token, opts, transport))) {
if (h323debug) {
cout << "Error making call to \"" << fullAddress << '"' << endl;
}
return 1;
}
*callReference = connection->GetCallReference();
if (h323debug) {
cout << "\t-- " << GetLocalUserName() << " is calling host " << fullAddress << endl;
cout << "\t-- Call token is " << (const char *)token << endl;
cout << "\t-- Call reference is " << *callReference << endl;
#ifdef PTRACING
cout << "\t-- DTMF Payload is " << connection->dtmfCodec << endl;
#endif
}
connection->Unlock();
return 0;
}
void MyH323EndPoint::SetEndpointTypeInfo( H225_EndpointType & info ) const
{
H323EndPoint::SetEndpointTypeInfo(info);
if (terminalType == e_GatewayOnly){
info.RemoveOptionalField(H225_EndpointType::e_terminal);
info.IncludeOptionalField(H225_EndpointType::e_gateway);
}
info.m_gateway.IncludeOptionalField(H225_GatewayInfo::e_protocol);
info.m_gateway.m_protocol.SetSize(1);
H225_SupportedProtocols &protocol=info.m_gateway.m_protocol[0];
protocol.SetTag(H225_SupportedProtocols::e_voice);
PINDEX as=SupportedPrefixes.GetSize();
((H225_VoiceCaps &)protocol).m_supportedPrefixes.SetSize(as);
for (PINDEX p=0; p<as; p++) {
H323SetAliasAddress(SupportedPrefixes[p], ((H225_VoiceCaps &)protocol).m_supportedPrefixes[p].m_prefix, H225_AliasAddress::e_dialedDigits);
}
}
void MyH323EndPoint::SetGateway(void)
{
terminalType = e_GatewayOnly;
}
PBoolean MyH323EndPoint::ClearCall(const PString & token, H323Connection::CallEndReason reason)
{
if (h323debug) {
#ifdef PTRACING
cout << "\t-- ClearCall: Request to clear call with token " << token << ", cause " << reason << endl;
#else
cout << "\t-- ClearCall: Request to clear call with token " << token << ", cause [" << (int)reason << "]" << endl;
#endif
}
return H323EndPoint::ClearCall(token, reason);
}
PBoolean MyH323EndPoint::ClearCall(const PString & token)
{
if (h323debug) {
cout << "\t-- ClearCall: Request to clear call with token " << token << endl;
}
return H323EndPoint::ClearCall(token, H323Connection::EndedByLocalUser);
}
void MyH323EndPoint::SendUserTone(const PString &token, char tone)
{
H323Connection *connection = NULL;
connection = FindConnectionWithLock(token);
if (connection != NULL) {
connection->SendUserInputTone(tone, 500);
connection->Unlock();
}
}
void MyH323EndPoint::OnClosedLogicalChannel(H323Connection & connection, const H323Channel & channel)
{
channelsOpen--;
if (h323debug) {
cout << "\t\tchannelsOpen = " << channelsOpen << endl;
}
H323EndPoint::OnClosedLogicalChannel(connection, channel);
}
PBoolean MyH323EndPoint::OnConnectionForwarded(H323Connection & connection,
const PString & forwardParty,
const H323SignalPDU & pdu)
{
if (h323debug) {
cout << "\t-- Call Forwarded to " << forwardParty << endl;
}
return FALSE;
}
PBoolean MyH323EndPoint::ForwardConnection(H323Connection & connection,
const PString & forwardParty,
const H323SignalPDU & pdu)
{
if (h323debug) {
cout << "\t-- Forwarding call to " << forwardParty << endl;
}
return H323EndPoint::ForwardConnection(connection, forwardParty, pdu);
}
void MyH323EndPoint::OnConnectionEstablished(H323Connection & connection, const PString & estCallToken)
{
if (h323debug) {
cout << "\t=-= In OnConnectionEstablished for call " << connection.GetCallReference() << endl;
cout << "\t\t-- Connection Established with \"" << connection.GetRemotePartyName() << "\"" << endl;
}
on_connection_established(connection.GetCallReference(), (const char *)connection.GetCallToken());
}
/** OnConnectionCleared callback function is called upon the dropping of an established
* H323 connection.
*/
void MyH323EndPoint::OnConnectionCleared(H323Connection & connection, const PString & clearedCallToken)
{
PString remoteName = connection.GetRemotePartyName();
switch (connection.GetCallEndReason()) {
case H323Connection::EndedByCallForwarded:
if (h323debug) {
cout << "-- " << remoteName << " has forwarded the call" << endl;
}
break;
case H323Connection::EndedByRemoteUser:
if (h323debug) {
cout << "-- " << remoteName << " has cleared the call" << endl;
}
break;
case H323Connection::EndedByCallerAbort:
if (h323debug) {
cout << "-- " << remoteName << " has stopped calling" << endl;
}
break;
case H323Connection::EndedByRefusal:
if (h323debug) {
cout << "-- " << remoteName << " did not accept your call" << endl;
}
break;
case H323Connection::EndedByRemoteBusy:
if (h323debug) {
cout << "-- " << remoteName << " was busy" << endl;
}
break;
case H323Connection::EndedByRemoteCongestion:
if (h323debug) {
cout << "-- Congested link to " << remoteName << endl;
}
break;
case H323Connection::EndedByNoAnswer:
if (h323debug) {
cout << "-- " << remoteName << " did not answer your call" << endl;
}
break;
case H323Connection::EndedByTransportFail:
if (h323debug) {
cout << "-- Call with " << remoteName << " ended abnormally" << endl;
}
break;
case H323Connection::EndedByCapabilityExchange:
if (h323debug) {
cout << "-- Could not find common codec with " << remoteName << endl;
}
break;
case H323Connection::EndedByNoAccept:
if (h323debug) {
cout << "-- Did not accept incoming call from " << remoteName << endl;
}
break;
case H323Connection::EndedByAnswerDenied:
if (h323debug) {
cout << "-- Refused incoming call from " << remoteName << endl;
}
break;
case H323Connection::EndedByNoUser:
if (h323debug) {
cout << "-- Remote endpoint could not find user: " << remoteName << endl;
}
break;
case H323Connection::EndedByNoBandwidth:
if (h323debug) {
cout << "-- Call to " << remoteName << " aborted, insufficient bandwidth." << endl;
}
break;
case H323Connection::EndedByUnreachable:
if (h323debug) {
cout << "-- " << remoteName << " could not be reached." << endl;
}
break;
case H323Connection::EndedByHostOffline:
if (h323debug) {
cout << "-- " << remoteName << " is not online." << endl;
}
break;
case H323Connection::EndedByNoEndPoint:
if (h323debug) {
cout << "-- No phone running for " << remoteName << endl;
}
break;
case H323Connection::EndedByConnectFail:
if (h323debug) {
cout << "-- Transport error calling " << remoteName << endl;
}
break;
default:
if (h323debug) {
#ifdef PTRACING
cout << " -- Call with " << remoteName << " completed (" << connection.GetCallEndReason() << ")" << endl;
#else
cout << " -- Call with " << remoteName << " completed ([" << (int)connection.GetCallEndReason() << "])" << endl;
#endif
}
}
if (connection.IsEstablished()) {
if (h323debug) {
cout << "\t-- Call duration " << setprecision(0) << setw(5) << (PTime() - connection.GetConnectionStartTime()) << endl;
}
}
/* Invoke the PBX application registered callback */
on_connection_cleared(connection.GetCallReference(), clearedCallToken);
return;
}
H323Connection * MyH323EndPoint::CreateConnection(unsigned callReference, void *userData, H323Transport *transport, H323SignalPDU *setupPDU)
{
unsigned options = 0;
call_options_t *opts = (call_options_t *)userData;
MyH323Connection *conn;
if (opts && opts->fastStart) {
options |= H323Connection::FastStartOptionEnable;
} else {
options |= H323Connection::FastStartOptionDisable;
}
if (opts && opts->h245Tunneling) {
options |= H323Connection::H245TunnelingOptionEnable;
} else {
options |= H323Connection::H245TunnelingOptionDisable;
}
/* Disable until I can figure out the proper way to deal with this */
#if 0
if (opts->silenceSuppression) {
options |= H323Connection::SilenceSuppresionOptionEnable;
} else {
options |= H323Connection::SilenceSUppressionOptionDisable;
}
#endif
conn = new MyH323Connection(*this, callReference, options);
if (conn) {
if (opts)
conn->SetCallOptions(opts, (setupPDU ? TRUE : FALSE));
}
return conn;
}
/* MyH323Connection Implementation */
MyH323Connection::MyH323Connection(MyH323EndPoint & ep, unsigned callReference,
unsigned options)
: H323Connection(ep, callReference, options)
{
#ifdef H323_H450
/* Dispatcher will free out all registered handlers */
delete h450dispatcher;
h450dispatcher = new H450xDispatcher(*this);
h4502handler = new H4502Handler(*this, *h450dispatcher);
h4504handler = new MyH4504Handler(*this, *h450dispatcher);
h4506handler = new H4506Handler(*this, *h450dispatcher);
h45011handler = new H45011Handler(*this, *h450dispatcher);
#endif
cause = -1;
sessionId = 0;
bridging = FALSE;
holdHandling = progressSetup = progressAlert = 0;
dtmfMode = 0;
dtmfCodec[0] = dtmfCodec[1] = (RTP_DataFrame::PayloadTypes)0;
redirect_reason = -1;
transfer_capability = -1;
#ifdef TUNNELLING
tunnelOptions = remoteTunnelOptions = 0;
#endif
if (h323debug) {
cout << " == New H.323 Connection created." << endl;
}
return;
}
MyH323Connection::~MyH323Connection()
{
if (h323debug) {
cout << " == H.323 Connection deleted." << endl;
}
return;
}
PBoolean MyH323Connection::OnReceivedProgress(const H323SignalPDU &pdu)
{
PBoolean isInband;
unsigned pi;
if (!H323Connection::OnReceivedProgress(pdu)) {
return FALSE;
}
if (!pdu.GetQ931().GetProgressIndicator(pi))
pi = 0;
if (h323debug) {
cout << "\t- Progress Indicator: " << pi << endl;
}
switch(pi) {
case Q931::ProgressNotEndToEndISDN:
case Q931::ProgressInbandInformationAvailable:
isInband = TRUE;
break;
default:
isInband = FALSE;
}
on_progress(GetCallReference(), (const char *)GetCallToken(), isInband);
return connectionState != ShuttingDownConnection;
}
PBoolean MyH323Connection::MySendProgress()
{
/* The code taken from H323Connection::AnsweringCall() but ALWAYS send
PROGRESS message, including slow start operations */
H323SignalPDU progressPDU;
H225_Progress_UUIE &prog = progressPDU.BuildProgress(*this);
if (!mediaWaitForConnect) {
if (SendFastStartAcknowledge(prog.m_fastStart))
prog.IncludeOptionalField(H225_Progress_UUIE::e_fastStart);
else {
if (connectionState == ShuttingDownConnection)
return FALSE;
/* Do early H.245 start */
earlyStart = TRUE;
if (!h245Tunneling) {
if (!H323Connection::StartControlChannel())
return FALSE;
prog.IncludeOptionalField(H225_Progress_UUIE::e_h245Address);
controlChannel->SetUpTransportPDU(prog.m_h245Address, TRUE);
}
}
}
progressPDU.GetQ931().SetProgressIndicator(Q931::ProgressInbandInformationAvailable);
#ifdef TUNNELLING
EmbedTunneledInfo(progressPDU);
#endif
HandleTunnelPDU(&progressPDU);
WriteSignalPDU(progressPDU);
return TRUE;
}
H323Connection::AnswerCallResponse MyH323Connection::OnAnswerCall(const PString & caller,
const H323SignalPDU & setupPDU,
H323SignalPDU & connectPDU)
{
unsigned pi;
if (h323debug) {
cout << "\t=-= In OnAnswerCall for call " << GetCallReference() << endl;
}
if (connectionState == ShuttingDownConnection)
return H323Connection::AnswerCallDenied;
if (!setupPDU.GetQ931().GetProgressIndicator(pi)) {
pi = 0;
}
if (h323debug) {
cout << "\t\t- Progress Indicator: " << pi << endl;
}
if (progressAlert) {
pi = progressAlert;
} else if (pi == Q931::ProgressOriginNotISDN) {
pi = Q931::ProgressInbandInformationAvailable;
}
if (pi && alertingPDU) {
alertingPDU->GetQ931().SetProgressIndicator(pi);
}
if (h323debug) {
cout << "\t\t- Inserting PI of " << pi << " into ALERTING message" << endl;
}
#ifdef TUNNELLING
if (alertingPDU)
EmbedTunneledInfo(*alertingPDU);
EmbedTunneledInfo(connectPDU);
#endif
if (!on_answer_call(GetCallReference(), (const char *)GetCallToken())) {
return H323Connection::AnswerCallDenied;
}
/* The call will be answered later with "AnsweringCall()" function.
*/
return ((pi || (fastStartState != FastStartDisabled)) ? AnswerCallDeferredWithMedia : AnswerCallDeferred);
}
PBoolean MyH323Connection::OnAlerting(const H323SignalPDU & alertingPDU, const PString & username)
{
if (h323debug) {
cout << "\t=-= In OnAlerting for call " << GetCallReference()
<< ": sessionId=" << sessionId << endl;
cout << "\t-- Ringing phone for \"" << username << "\"" << endl;
}
if (on_progress) {
PBoolean isInband;
unsigned alertingPI;
if (!alertingPDU.GetQ931().GetProgressIndicator(alertingPI)) {
alertingPI = 0;
}
if (h323debug) {
cout << "\t\t- Progress Indicator: " << alertingPI << endl;
}
switch(alertingPI) {
case Q931::ProgressNotEndToEndISDN:
case Q931::ProgressInbandInformationAvailable:
isInband = TRUE;
break;
default:
isInband = FALSE;
}
on_progress(GetCallReference(), (const char *)GetCallToken(), isInband);
}
on_chan_ringing(GetCallReference(), (const char *)GetCallToken() );
return connectionState != ShuttingDownConnection;
}
void MyH323Connection::SetCallOptions(void *o, PBoolean isIncoming)
{
call_options_t *opts = (call_options_t *)o;
progressSetup = opts->progress_setup;
progressAlert = opts->progress_alert;
holdHandling = opts->holdHandling;
dtmfCodec[0] = (RTP_DataFrame::PayloadTypes)opts->dtmfcodec[0];
dtmfCodec[1] = (RTP_DataFrame::PayloadTypes)opts->dtmfcodec[1];
dtmfMode = opts->dtmfmode;
if (isIncoming) {
fastStartState = (opts->fastStart ? FastStartInitiate : FastStartDisabled);
h245Tunneling = (opts->h245Tunneling ? TRUE : FALSE);
} else {
sourceE164 = PString(opts->cid_num);
SetLocalPartyName(PString(opts->cid_name));
SetDisplayName(PString(opts->cid_name));
if (opts->redirect_reason >= 0) {
rdnis = PString(opts->cid_rdnis);
redirect_reason = opts->redirect_reason;
}
cid_presentation = opts->presentation;
cid_ton = opts->type_of_number;
if (opts->transfer_capability >= 0) {
transfer_capability = opts->transfer_capability;
}
}
tunnelOptions = opts->tunnelOptions;
}
void MyH323Connection::SetCallDetails(void *callDetails, const H323SignalPDU &setupPDU, PBoolean isIncoming)
{
PString sourceE164;
PString destE164;
PString sourceAliases;
PString destAliases;
char *s, *s1;
call_details_t *cd = (call_details_t *)callDetails;
memset(cd, 0, sizeof(*cd));
cd->call_reference = GetCallReference();
cd->call_token = strdup((const char *)GetCallToken());
sourceE164 = "";
setupPDU.GetSourceE164(sourceE164);
cd->call_source_e164 = strdup((const char *)sourceE164);
destE164 = "";
setupPDU.GetDestinationE164(destE164);
cd->call_dest_e164 = strdup((const char *)destE164);
/* XXX Is it possible to have this information for outgoing calls too? XXX */
if (isIncoming) {
PString sourceName;
PIPSocket::Address Ip;
WORD sourcePort;
PString redirect_number;
unsigned redirect_reason;
unsigned plan, type, screening, presentation;
Q931::InformationTransferCapability capability;
unsigned transferRate, codingStandard, userInfoLayer1;
/* Fetch presentation and type information about calling party's number */
if (setupPDU.GetQ931().GetCallingPartyNumber(sourceName, &plan, &type, &presentation, &screening, 0, 0)) {
/* Construct fields back */
cd->type_of_number = (type << 4) | plan;
cd->presentation = (presentation << 5) | screening;
} else if (cd->call_source_e164[0]) {
cd->type_of_number = 0; /* UNKNOWN */
cd->presentation = 0x03; /* ALLOWED NETWORK NUMBER - Default */
if (setupPDU.GetQ931().HasIE(Q931::UserUserIE)) {
const H225_Setup_UUIE &setup_uuie = setupPDU.m_h323_uu_pdu.m_h323_message_body;
if (setup_uuie.HasOptionalField(H225_Setup_UUIE::e_presentationIndicator))
cd->presentation = (cd->presentation & 0x9f) | (((unsigned int)setup_uuie.m_presentationIndicator.GetTag()) << 5);
if (setup_uuie.HasOptionalField(H225_Setup_UUIE::e_screeningIndicator))
cd->presentation = (cd->presentation & 0xe0) | (((unsigned int)setup_uuie.m_screeningIndicator.GetValue()) & 0x1f);
}
} else {
cd->type_of_number = 0; /* UNKNOWN */
cd->presentation = 0x43; /* NUMBER NOT AVAILABLE */
}
sourceName = setupPDU.GetQ931().GetDisplayName();
cd->call_source_name = strdup((const char *)sourceName);
GetSignallingChannel()->GetRemoteAddress().GetIpAndPort(Ip, sourcePort);
cd->sourceIp = strdup((const char *)Ip.AsString());
if (setupPDU.GetQ931().GetRedirectingNumber(redirect_number, NULL, NULL, NULL, NULL, &redirect_reason, 0, 0, 0)) {
cd->redirect_number = strdup((const char *)redirect_number);
cd->redirect_reason = redirect_reason;
}
else
cd->redirect_reason = -1;
/* Fetch Q.931's transfer capability */
if (((Q931 &)setupPDU.GetQ931()).GetBearerCapabilities(capability, transferRate, &codingStandard, &userInfoLayer1))
cd->transfer_capability = ((unsigned int)capability & 0x1f) | (codingStandard << 5);
else
cd->transfer_capability = 0x00; /* ITU coding of Speech */
/* Don't show local username as called party name */
SetDisplayName(cd->call_dest_e164);
}
/* Convert complex strings */
// FIXME: deal more than one source alias
sourceAliases = setupPDU.GetSourceAliases();
s1 = strdup((const char *)sourceAliases);
if ((s = strchr(s1, ' ')) != NULL)
*s = '\0';
if ((s = strchr(s1, '\t')) != NULL)
*s = '\0';
cd->call_source_aliases = s1;
destAliases = setupPDU.GetDestinationAlias();
s1 = strdup((const char *)destAliases);
if ((s = strchr(s1, ' ')) != NULL)
*s = '\0';
if ((s = strchr(s1, '\t')) != NULL)
*s = '\0';
cd->call_dest_alias = s1;
}
#ifdef TUNNELLING
static PBoolean FetchInformationElements(Q931 &q931, const PBYTEArray &data)
{
PINDEX offset = 0;
while (offset < data.GetSize()) {
// Get field discriminator
int discriminator = data[offset++];
#if 0
/* Do not overwrite existing IEs */
if (q931.HasIE((Q931::InformationElementCodes)discriminator)) {
if ((discriminatir & 0x80) == 0)
offset += data[offset++];
if (offset > data.GetSize())
return FALSE;
continue;
}
#endif
PBYTEArray * item = new PBYTEArray;
// For discriminator with high bit set there is no data
if ((discriminator & 0x80) == 0) {
int len = data[offset++];
#if 0 // That is not H.225 but regular Q.931 (ISDN) IEs
if (discriminator == UserUserIE) {
// Special case of User-user field. See 7.2.2.31/H.225.0v4.
len <<= 8;
len |= data[offset++];
// we also have a protocol discriminator, which we ignore
offset++;
// before decrementing the length, make sure it is not zero
if (len == 0)
return FALSE;
// adjust for protocol discriminator
len--;
}
#endif
if (offset + len > data.GetSize()) {
delete item;
return FALSE;
}
memcpy(item->GetPointer(len), (const BYTE *)data+offset, len);
offset += len;
}
q931.SetIE((Q931::InformationElementCodes)discriminator, *item);
delete item;
}
return TRUE;
}
static PBoolean FetchCiscoTunneledInfo(Q931 &q931, const H323SignalPDU &pdu)
{
PBoolean res = FALSE;
const H225_H323_UU_PDU &uuPDU = pdu.m_h323_uu_pdu;
if(uuPDU.HasOptionalField(H225_H323_UU_PDU::e_nonStandardControl)) {
for(int i = 0; i < uuPDU.m_nonStandardControl.GetSize(); ++i) {
const H225_NonStandardParameter &np = uuPDU.m_nonStandardControl[i];
const H225_NonStandardIdentifier &id = np.m_nonStandardIdentifier;
if (id.GetTag() == H225_NonStandardIdentifier::e_h221NonStandard) {
const H225_H221NonStandard &ni = id;
/* Check for Cisco */
if ((ni.m_t35CountryCode == 181) && (ni.m_t35Extension == 0) && (ni.m_manufacturerCode == 18)) {
const PBYTEArray &data = np.m_data;
if (h323debug)
cout << setprecision(0) << "Received non-standard Cisco extension data " << np.m_data << endl;
CISCO_H225_H323_UU_NonStdInfo c;
PPER_Stream strm(data);
if (c.Decode(strm)) {
PBoolean haveIEs = FALSE;
if (h323debug)
cout << setprecision(0) << "H323_UU_NonStdInfo = " << c << endl;
if (c.HasOptionalField(CISCO_H225_H323_UU_NonStdInfo::e_protoParam)) {
FetchInformationElements(q931, c.m_protoParam.m_qsigNonStdInfo.m_rawMesg);
haveIEs = TRUE;
}
if (c.HasOptionalField(CISCO_H225_H323_UU_NonStdInfo::e_commonParam)) {
FetchInformationElements(q931, c.m_commonParam.m_redirectIEinfo.m_redirectIE);
haveIEs = TRUE;
}
if (haveIEs && h323debug)
cout << setprecision(0) << "Information elements collected:" << q931 << endl;
res = TRUE;
} else {
cout << "ERROR while decoding non-standard Cisco extension" << endl;
return FALSE;
}
}
}
}
}
return res;
}
static PBoolean EmbedCiscoTunneledInfo(H323SignalPDU &pdu)
{
static const struct {
Q931::InformationElementCodes ie;
PBoolean dontDelete;
} codes[] = {
{ Q931::RedirectingNumberIE, },
{ Q931::FacilityIE, },
// { Q931::CallingPartyNumberIE, TRUE },
};
PBoolean res = FALSE;
PBoolean notRedirOnly = FALSE;
Q931 tmpQ931;
Q931 &q931 = pdu.GetQ931();
for(unsigned i = 0; i < ARRAY_LEN(codes); ++i) {
if (q931.HasIE(codes[i].ie)) {
tmpQ931.SetIE(codes[i].ie, q931.GetIE(codes[i].ie));
if (!codes[i].dontDelete)
q931.RemoveIE(codes[i].ie);
if (codes[i].ie != Q931::RedirectingNumberIE)
notRedirOnly = TRUE;
res = TRUE;
}
}
/* Have something to embed */
if (res) {
PBYTEArray msg;
if (!tmpQ931.Encode(msg))
return FALSE;
PBYTEArray ies(msg.GetPointer() + 5, msg.GetSize() - 5);
H225_H323_UU_PDU &uuPDU = pdu.m_h323_uu_pdu;
if(!uuPDU.HasOptionalField(H225_H323_UU_PDU::e_nonStandardControl)) {
uuPDU.IncludeOptionalField(H225_H323_UU_PDU::e_nonStandardControl);
uuPDU.m_nonStandardControl.SetSize(0);
}
H225_NonStandardParameter *np = new H225_NonStandardParameter;
uuPDU.m_nonStandardControl.Append(np);
H225_NonStandardIdentifier &nsi = (*np).m_nonStandardIdentifier;
nsi.SetTag(H225_NonStandardIdentifier::e_h221NonStandard);
H225_H221NonStandard &ns = nsi;
ns.m_t35CountryCode = 181;
ns.m_t35Extension = 0;
ns.m_manufacturerCode = 18;
CISCO_H225_H323_UU_NonStdInfo c;
c.IncludeOptionalField(CISCO_H225_H323_UU_NonStdInfo::e_version);
c.m_version = 0;
if (notRedirOnly) {
c.IncludeOptionalField(CISCO_H225_H323_UU_NonStdInfo::e_protoParam);
CISCO_H225_QsigNonStdInfo &qsigInfo = c.m_protoParam.m_qsigNonStdInfo;
qsigInfo.m_iei = ies[0];
qsigInfo.m_rawMesg = ies;
} else {
c.IncludeOptionalField(CISCO_H225_H323_UU_NonStdInfo::e_commonParam);
c.m_commonParam.m_redirectIEinfo.m_redirectIE = ies;
}
PPER_Stream stream;
c.Encode(stream);
stream.CompleteEncoding();
(*np).m_data = stream;
}
return res;
}
static const char OID_QSIG[] = "1.3.12.9";
static PBoolean FetchQSIGTunneledInfo(Q931 &q931, const H323SignalPDU &pdu)
{
PBoolean res = FALSE;
const H225_H323_UU_PDU &uuPDU = pdu.m_h323_uu_pdu;
if (uuPDU.HasOptionalField(H225_H323_UU_PDU::e_tunnelledSignallingMessage)) {
const H225_H323_UU_PDU_tunnelledSignallingMessage &sig = uuPDU.m_tunnelledSignallingMessage;
const H225_TunnelledProtocol_id &proto = sig.m_tunnelledProtocolID.m_id;
if ((proto.GetTag() == H225_TunnelledProtocol_id::e_tunnelledProtocolObjectID) &&
(((const PASN_ObjectId &)proto).AsString() == OID_QSIG)) {
const H225_ArrayOf_PASN_OctetString &sigs = sig.m_messageContent;
for(int i = 0; i < sigs.GetSize(); ++i) {
const PASN_OctetString &msg = sigs[i];
if (h323debug)
cout << setprecision(0) << "Q.931 message data is " << msg << endl;
if(!q931.Decode((const PBYTEArray &)msg)) {
cout << "Error while decoding Q.931 message" << endl;
return FALSE;
}
res = TRUE;
if (h323debug)
cout << setprecision(0) << "Received QSIG message " << q931 << endl;
}
}
}
return res;
}
static H225_EndpointType *GetEndpointType(H323SignalPDU &pdu)
{
if (!pdu.GetQ931().HasIE(Q931::UserUserIE))
return NULL;
H225_H323_UU_PDU_h323_message_body &body = pdu.m_h323_uu_pdu.m_h323_message_body;
switch (body.GetTag()) {
case H225_H323_UU_PDU_h323_message_body::e_setup:
return &((H225_Setup_UUIE &)body).m_sourceInfo;
case H225_H323_UU_PDU_h323_message_body::e_callProceeding:
return &((H225_CallProceeding_UUIE &)body).m_destinationInfo;
case H225_H323_UU_PDU_h323_message_body::e_connect:
return &((H225_Connect_UUIE &)body).m_destinationInfo;
case H225_H323_UU_PDU_h323_message_body::e_alerting:
return &((H225_Alerting_UUIE &)body).m_destinationInfo;
case H225_H323_UU_PDU_h323_message_body::e_facility:
return &((H225_Facility_UUIE &)body).m_destinationInfo;
case H225_H323_UU_PDU_h323_message_body::e_progress:
return &((H225_Progress_UUIE &)body).m_destinationInfo;
}
return NULL;
}
static PBoolean QSIGTunnelRequested(H323SignalPDU &pdu)
{
H225_EndpointType *epType = GetEndpointType(pdu);
if (epType) {
if (!(*epType).HasOptionalField(H225_EndpointType::e_supportedTunnelledProtocols)) {
return FALSE;
}
H225_ArrayOf_TunnelledProtocol &protos = (*epType).m_supportedTunnelledProtocols;
for (int i = 0; i < protos.GetSize(); ++i)
{
if ((protos[i].GetTag() == H225_TunnelledProtocol_id::e_tunnelledProtocolObjectID) &&
(((const PASN_ObjectId &)protos[i]).AsString() == OID_QSIG)) {
return TRUE;
}
}
}
return FALSE;
}
static PBoolean EmbedQSIGTunneledInfo(H323SignalPDU &pdu)
{
static const Q931::InformationElementCodes codes[] =
{ Q931::RedirectingNumberIE, Q931::FacilityIE };
Q931 &q931 = pdu.GetQ931();
PBYTEArray message;
q931.Encode(message);
/* Remove non-standard IEs */
for(unsigned i = 0; i < ARRAY_LEN(codes); ++i) {
if (q931.HasIE(codes[i])) {
q931.RemoveIE(codes[i]);
}
}
H225_H323_UU_PDU &uuPDU = pdu.m_h323_uu_pdu;
H225_EndpointType *epType = GetEndpointType(pdu);
if (epType) {
if (!(*epType).HasOptionalField(H225_EndpointType::e_supportedTunnelledProtocols)) {
(*epType).IncludeOptionalField(H225_EndpointType::e_supportedTunnelledProtocols);
(*epType).m_supportedTunnelledProtocols.SetSize(0);
}
H225_ArrayOf_TunnelledProtocol &protos = (*epType).m_supportedTunnelledProtocols;
PBoolean addQSIG = TRUE;
for (int i = 0; i < protos.GetSize(); ++i)
{
if ((protos[i].GetTag() == H225_TunnelledProtocol_id::e_tunnelledProtocolObjectID) &&
(((PASN_ObjectId &)protos[i]).AsString() == OID_QSIG)) {
addQSIG = FALSE;
break;
}
}
if (addQSIG) {
H225_TunnelledProtocol *proto = new H225_TunnelledProtocol;
(*proto).m_id.SetTag(H225_TunnelledProtocol_id::e_tunnelledProtocolObjectID);
(PASN_ObjectId &)(proto->m_id) = OID_QSIG;
protos.Append(proto);
}
}
if (!uuPDU.HasOptionalField(H225_H323_UU_PDU::e_tunnelledSignallingMessage))
uuPDU.IncludeOptionalField(H225_H323_UU_PDU::e_tunnelledSignallingMessage);
H225_H323_UU_PDU_tunnelledSignallingMessage &sig = uuPDU.m_tunnelledSignallingMessage;
H225_TunnelledProtocol_id &proto = sig.m_tunnelledProtocolID.m_id;
if ((proto.GetTag() != H225_TunnelledProtocol_id::e_tunnelledProtocolObjectID) ||
(((const PASN_ObjectId &)proto).AsString() != OID_QSIG)) {
proto.SetTag(H225_TunnelledProtocol_id::e_tunnelledProtocolObjectID);
(PASN_ObjectId &)proto = OID_QSIG;
sig.m_messageContent.SetSize(0);
}
PASN_OctetString *msg = new PASN_OctetString;
sig.m_messageContent.Append(msg);
*msg = message;
return TRUE;
}
PBoolean MyH323Connection::EmbedTunneledInfo(H323SignalPDU &pdu)
{
if ((tunnelOptions & H323_TUNNEL_QSIG) || (remoteTunnelOptions & H323_TUNNEL_QSIG))
EmbedQSIGTunneledInfo(pdu);
if ((tunnelOptions & H323_TUNNEL_CISCO) || (remoteTunnelOptions & H323_TUNNEL_CISCO))
EmbedCiscoTunneledInfo(pdu);
return TRUE;
}
/* Handle tunneled messages */
PBoolean MyH323Connection::HandleSignalPDU(H323SignalPDU &pdu)
{
if (pdu.GetQ931().HasIE(Q931::UserUserIE)) {
Q931 tunneledInfo;
const Q931 *q931Info;
q931Info = NULL;
if (FetchCiscoTunneledInfo(tunneledInfo, pdu)) {
q931Info = &tunneledInfo;
remoteTunnelOptions |= H323_TUNNEL_CISCO;
}
if (FetchQSIGTunneledInfo(tunneledInfo, pdu)) {
q931Info = &tunneledInfo;
remoteTunnelOptions |= H323_TUNNEL_QSIG;
}
if (!(remoteTunnelOptions & H323_TUNNEL_QSIG) && QSIGTunnelRequested(pdu)) {
remoteTunnelOptions |= H323_TUNNEL_QSIG;
}
if (q931Info) {
if (q931Info->HasIE(Q931::RedirectingNumberIE)) {
pdu.GetQ931().SetIE(Q931::RedirectingNumberIE, q931Info->GetIE(Q931::RedirectingNumberIE));
if (h323debug) {
PString number;
unsigned reason;
if(q931Info->GetRedirectingNumber(number, NULL, NULL, NULL, NULL, &reason, 0, 0, 0))
cout << "Got redirection from " << number << ", reason " << reason << endl;
}
}
}
}
return H323Connection::HandleSignalPDU(pdu);
}
#endif
PBoolean MyH323Connection::OnReceivedSignalSetup(const H323SignalPDU & setupPDU)
{
call_details_t cd;
if (h323debug) {
cout << "\t--Received SETUP message" << endl;
}
if (connectionState == ShuttingDownConnection)
return FALSE;
SetCallDetails(&cd, setupPDU, TRUE);
/* Notify Asterisk of the request */
call_options_t *res = on_incoming_call(&cd);
if (!res) {
if (h323debug) {
cout << "\t-- Call Failed" << endl;
}
return FALSE;
}
SetCallOptions(res, TRUE);
/* Disable fastStart if requested by remote side */
if (h245Tunneling && !setupPDU.m_h323_uu_pdu.m_h245Tunneling) {
masterSlaveDeterminationProcedure->Stop();
capabilityExchangeProcedure->Stop();
PTRACE(3, "H225\tFast Start DISABLED!");
h245Tunneling = FALSE;
}
return H323Connection::OnReceivedSignalSetup(setupPDU);
}
PBoolean MyH323Connection::OnSendSignalSetup(H323SignalPDU & setupPDU)
{
call_details_t cd;
if (h323debug) {
cout << "\t-- Sending SETUP message" << endl;
}
if (connectionState == ShuttingDownConnection)
return FALSE;
if (progressSetup)
setupPDU.GetQ931().SetProgressIndicator(progressSetup);
if (redirect_reason >= 0) {
setupPDU.GetQ931().SetRedirectingNumber(rdnis, 0, 0, 0, 0, redirect_reason);
/* OpenH323 incorrectly fills number IE when redirecting reason is specified - fix it */
PBYTEArray IE(setupPDU.GetQ931().GetIE(Q931::RedirectingNumberIE));
IE[0] = IE[0] & 0x7f;
IE[1] = IE[1] & 0x7f;
setupPDU.GetQ931().SetIE(Q931::RedirectingNumberIE, IE);
}
if (transfer_capability)
setupPDU.GetQ931().SetBearerCapabilities((Q931::InformationTransferCapability)(transfer_capability & 0x1f), 1, ((transfer_capability >> 5) & 3));
SetCallDetails(&cd, setupPDU, FALSE);
int res = on_outgoing_call(&cd);
if (!res) {
if (h323debug) {
cout << "\t-- Call Failed" << endl;
}
return FALSE;
}
/* OpenH323 will build calling party information with default
type and presentation information, so build it to be recorded
by embedding routines */
setupPDU.GetQ931().SetCallingPartyNumber(sourceE164, (cid_ton >> 4) & 0x07,
cid_ton & 0x0f, (cid_presentation >> 5) & 0x03, cid_presentation & 0x1f);
setupPDU.GetQ931().SetDisplayName(GetDisplayName());
#ifdef TUNNELLING
EmbedTunneledInfo(setupPDU);
#endif
return H323Connection::OnSendSignalSetup(setupPDU);
}
static PBoolean BuildFastStartList(const H323Channel & channel,
H225_ArrayOf_PASN_OctetString & array,
H323Channel::Directions reverseDirection)
{
H245_OpenLogicalChannel open;
const H323Capability & capability = channel.GetCapability();
if (channel.GetDirection() != reverseDirection) {
if (!capability.OnSendingPDU(open.m_forwardLogicalChannelParameters.m_dataType))
return FALSE;
}
else {
if (!capability.OnSendingPDU(open.m_reverseLogicalChannelParameters.m_dataType))
return FALSE;
open.m_forwardLogicalChannelParameters.m_multiplexParameters.SetTag(
H245_OpenLogicalChannel_forwardLogicalChannelParameters_multiplexParameters::e_none);
open.m_forwardLogicalChannelParameters.m_dataType.SetTag(H245_DataType::e_nullData);
open.IncludeOptionalField(H245_OpenLogicalChannel::e_reverseLogicalChannelParameters);
}
if (!channel.OnSendingPDU(open))
return FALSE;
PTRACE(4, "H225\tBuild fastStart:\n " << setprecision(2) << open);
PINDEX last = array.GetSize();
array.SetSize(last+1);
array[last].EncodeSubType(open);
PTRACE(3, "H225\tBuilt fastStart for " << capability);
return TRUE;
}
H323Connection::CallEndReason MyH323Connection::SendSignalSetup(const PString & alias,
const H323TransportAddress & address)
{
// Start the call, first state is asking gatekeeper
connectionState = AwaitingGatekeeperAdmission;
// Indicate the direction of call.
if (alias.IsEmpty())
remotePartyName = remotePartyAddress = address;
else {
remotePartyName = alias;
remotePartyAddress = alias + '@' + address;
}
// Start building the setup PDU to get various ID's
H323SignalPDU setupPDU;
H225_Setup_UUIE & setup = setupPDU.BuildSetup(*this, address);
#ifdef H323_H450
h450dispatcher->AttachToSetup(setupPDU);
#endif
// Save the identifiers generated by BuildSetup
setupPDU.GetQ931().GetCalledPartyNumber(remotePartyNumber);
H323TransportAddress gatekeeperRoute = address;
// Check for gatekeeper and do admission check if have one
H323Gatekeeper * gatekeeper = endpoint.GetGatekeeper();
H225_ArrayOf_AliasAddress newAliasAddresses;
if (gatekeeper != NULL) {
H323Gatekeeper::AdmissionResponse response;
response.transportAddress = &gatekeeperRoute;
response.aliasAddresses = &newAliasAddresses;
if (!gkAccessTokenOID)
response.accessTokenData = &gkAccessTokenData;
while (!gatekeeper->AdmissionRequest(*this, response, alias.IsEmpty())) {
PTRACE(1, "H225\tGatekeeper refused admission: "
<< (response.rejectReason == UINT_MAX
? PString("Transport error")
: H225_AdmissionRejectReason(response.rejectReason).GetTagName()));
#ifdef H323_H450
h4502handler->onReceivedAdmissionReject(H4501_GeneralErrorList::e_notAvailable);
#endif
switch (response.rejectReason) {
case H225_AdmissionRejectReason::e_calledPartyNotRegistered:
return EndedByNoUser;
case H225_AdmissionRejectReason::e_requestDenied:
return EndedByNoBandwidth;
case H225_AdmissionRejectReason::e_invalidPermission:
case H225_AdmissionRejectReason::e_securityDenial:
return EndedBySecurityDenial;
case H225_AdmissionRejectReason::e_resourceUnavailable:
return EndedByRemoteBusy;
case H225_AdmissionRejectReason::e_incompleteAddress:
if (OnInsufficientDigits())
break;
// Then default case
default:
return EndedByGatekeeper;
}
PString lastRemotePartyName = remotePartyName;
while (lastRemotePartyName == remotePartyName) {
Unlock(); // Release the mutex as can deadlock trying to clear call during connect.
digitsWaitFlag.Wait();
if (!Lock()) // Lock while checking for shutting down.
return EndedByCallerAbort;
}
}
mustSendDRQ = TRUE;
if (response.gatekeeperRouted) {
setup.IncludeOptionalField(H225_Setup_UUIE::e_endpointIdentifier);
setup.m_endpointIdentifier = gatekeeper->GetEndpointIdentifier();
gatekeeperRouted = TRUE;
}
}
#ifdef H323_TRANSNEXUS_OSP
// check for OSP server (if not using GK)
if (gatekeeper == NULL) {
OpalOSP::Provider * ospProvider = endpoint.GetOSPProvider();
if (ospProvider != NULL) {
OpalOSP::Transaction * transaction = new OpalOSP::Transaction();
if (transaction->Open(*ospProvider) != 0) {
PTRACE(1, "H225\tCannot create OSP transaction");
return EndedByOSPRefusal;
}
OpalOSP::Transaction::DestinationInfo destInfo;
if (!AuthoriseOSPTransaction(*transaction, destInfo)) {
delete transaction;
return EndedByOSPRefusal;
}
// save the transaction for use by the call
ospTransaction = transaction;
// retreive the call information
gatekeeperRoute = destInfo.destinationAddress;
newAliasAddresses.Append(new H225_AliasAddress(destInfo.calledNumber));
// insert the token
setup.IncludeOptionalField(H225_Setup_UUIE::e_tokens);
destInfo.InsertToken(setup.m_tokens);
}
}
#endif
// Update the field e_destinationAddress in the SETUP PDU to reflect the new
// alias received in the ACF (m_destinationInfo).
if (newAliasAddresses.GetSize() > 0) {
setup.IncludeOptionalField(H225_Setup_UUIE::e_destinationAddress);
setup.m_destinationAddress = newAliasAddresses;
// Update the Q.931 Information Element (if is an E.164 address)
PString e164 = H323GetAliasAddressE164(newAliasAddresses);
if (!e164)
remotePartyNumber = e164;
}
if (addAccessTokenToSetup && !gkAccessTokenOID && !gkAccessTokenData.IsEmpty()) {
PString oid1, oid2;
PINDEX comma = gkAccessTokenOID.Find(',');
if (comma == P_MAX_INDEX)
oid1 = oid2 = gkAccessTokenOID;
else {
oid1 = gkAccessTokenOID.Left(comma);
oid2 = gkAccessTokenOID.Mid(comma+1);
}
setup.IncludeOptionalField(H225_Setup_UUIE::e_tokens);
PINDEX last = setup.m_tokens.GetSize();
setup.m_tokens.SetSize(last+1);
setup.m_tokens[last].m_tokenOID = oid1;
setup.m_tokens[last].IncludeOptionalField(H235_ClearToken::e_nonStandard);
setup.m_tokens[last].m_nonStandard.m_nonStandardIdentifier = oid2;
setup.m_tokens[last].m_nonStandard.m_data = gkAccessTokenData;
}
if (!signallingChannel->SetRemoteAddress(gatekeeperRoute)) {
PTRACE(1, "H225\tInvalid "
<< (gatekeeperRoute != address ? "gatekeeper" : "user")
<< " supplied address: \"" << gatekeeperRoute << '"');
connectionState = AwaitingTransportConnect;
return EndedByConnectFail;
}
// Do the transport connect
connectionState = AwaitingTransportConnect;
// Release the mutex as can deadlock trying to clear call during connect.
Unlock();
signallingChannel->SetWriteTimeout(100);
PBoolean connectFailed = !signallingChannel->Connect();
// Lock while checking for shutting down.
if (!Lock())
return EndedByCallerAbort;
// See if transport connect failed, abort if so.
if (connectFailed) {
connectionState = NoConnectionActive;
switch (signallingChannel->GetErrorNumber()) {
case ENETUNREACH :
return EndedByUnreachable;
case ECONNREFUSED :
return EndedByNoEndPoint;
case ETIMEDOUT :
return EndedByHostOffline;
}
return EndedByConnectFail;
}
PTRACE(3, "H225\tSending Setup PDU");
connectionState = AwaitingSignalConnect;
// Put in all the signalling addresses for link
setup.IncludeOptionalField(H225_Setup_UUIE::e_sourceCallSignalAddress);
signallingChannel->SetUpTransportPDU(setup.m_sourceCallSignalAddress, TRUE);
if (!setup.HasOptionalField(H225_Setup_UUIE::e_destCallSignalAddress)) {
setup.IncludeOptionalField(H225_Setup_UUIE::e_destCallSignalAddress);
signallingChannel->SetUpTransportPDU(setup.m_destCallSignalAddress, FALSE);
}
// If a standard call do Fast Start (if required)
if (setup.m_conferenceGoal.GetTag() == H225_Setup_UUIE_conferenceGoal::e_create) {
// Get the local capabilities before fast start is handled
OnSetLocalCapabilities();
// Ask the application what channels to open
PTRACE(3, "H225\tCheck for Fast start by local endpoint");
fastStartChannels.RemoveAll();
OnSelectLogicalChannels();
// If application called OpenLogicalChannel, put in the fastStart field
if (!fastStartChannels.IsEmpty()) {
PTRACE(3, "H225\tFast start begun by local endpoint");
for (PINDEX i = 0; i < fastStartChannels.GetSize(); i++)
BuildFastStartList(fastStartChannels[i], setup.m_fastStart, H323Channel::IsReceiver);
if (setup.m_fastStart.GetSize() > 0)
setup.IncludeOptionalField(H225_Setup_UUIE::e_fastStart);
}
// Search the capability set and see if we have video capability
for (PINDEX i = 0; i < localCapabilities.GetSize(); i++) {
switch (localCapabilities[i].GetMainType()) {
case H323Capability::e_Audio:
case H323Capability::e_UserInput:
break;
default: // Is video or other data (eg T.120)
setupPDU.GetQ931().SetBearerCapabilities(Q931::TransferUnrestrictedDigital, 6);
i = localCapabilities.GetSize(); // Break out of the for loop
break;
}
}
}
if (!OnSendSignalSetup(setupPDU))
return EndedByNoAccept;
// Do this again (was done when PDU was constructed) in case
// OnSendSignalSetup() changed something.
// setupPDU.SetQ931Fields(*this, TRUE);
setupPDU.GetQ931().GetCalledPartyNumber(remotePartyNumber);
fastStartState = FastStartDisabled;
PBoolean set_lastPDUWasH245inSETUP = FALSE;
if (h245Tunneling && doH245inSETUP) {
h245TunnelTxPDU = &setupPDU;
// Try and start the master/slave and capability exchange through the tunnel
// Note: this used to be disallowed but is now allowed as of H323v4
PBoolean ok = StartControlNegotiations();
h245TunnelTxPDU = NULL;
if (!ok)
return EndedByTransportFail;
if (setup.m_fastStart.GetSize() > 0) {
// Now if fast start as well need to put this in setup specific field
// and not the generic H.245 tunneling field
setup.IncludeOptionalField(H225_Setup_UUIE::e_parallelH245Control);
setup.m_parallelH245Control = setupPDU.m_h323_uu_pdu.m_h245Control;
setupPDU.m_h323_uu_pdu.RemoveOptionalField(H225_H323_UU_PDU::e_h245Control);
set_lastPDUWasH245inSETUP = TRUE;
}
}
// Send the initial PDU
setupTime = PTime();
if (!WriteSignalPDU(setupPDU))
return EndedByTransportFail;
// WriteSignalPDU always resets lastPDUWasH245inSETUP.
// So set it here if required
if (set_lastPDUWasH245inSETUP)
lastPDUWasH245inSETUP = TRUE;
// Set timeout for remote party to answer the call
signallingChannel->SetReadTimeout(endpoint.GetSignallingChannelCallTimeout());
return NumCallEndReasons;
}
PBoolean MyH323Connection::OnSendReleaseComplete(H323SignalPDU & releaseCompletePDU)
{
if (h323debug) {
cout << "\t-- Sending RELEASE COMPLETE" << endl;
}
if (cause > 0)
releaseCompletePDU.GetQ931().SetCause((Q931::CauseValues)cause);
#ifdef TUNNELLING
EmbedTunneledInfo(releaseCompletePDU);
#endif
return H323Connection::OnSendReleaseComplete(releaseCompletePDU);
}
PBoolean MyH323Connection::OnReceivedFacility(const H323SignalPDU & pdu)
{
if (h323debug) {
cout << "\t-- Received Facility message... " << endl;
}
return H323Connection::OnReceivedFacility(pdu);
}
void MyH323Connection::OnReceivedReleaseComplete(const H323SignalPDU & pdu)
{
if (h323debug) {
cout << "\t-- Received RELEASE COMPLETE message..." << endl;
}
if (on_hangup)
on_hangup(GetCallReference(), (const char *)GetCallToken(), pdu.GetQ931().GetCause());
return H323Connection::OnReceivedReleaseComplete(pdu);
}
PBoolean MyH323Connection::OnClosingLogicalChannel(H323Channel & channel)
{
if (h323debug) {
cout << "\t-- Closing logical channel..." << endl;
}
return H323Connection::OnClosingLogicalChannel(channel);
}
void MyH323Connection::SendUserInputTone(char tone, unsigned duration, unsigned logicalChannel, unsigned rtpTimestamp)
{
SendUserInputModes mode = GetRealSendUserInputMode();
// That is recursive call... Why?
// on_receive_digit(GetCallReference(), tone, (const char *)GetCallToken());
if ((tone != ' ') || (mode == SendUserInputAsTone) || (mode == SendUserInputAsInlineRFC2833)) {
if (h323debug) {
cout << "\t-- Sending user input tone (" << tone << ") to remote" << endl;
}
H323Connection::SendUserInputTone(tone, duration);
}
}
void MyH323Connection::OnUserInputTone(char tone, unsigned duration, unsigned logicalChannel, unsigned rtpTimestamp)
{
/* Why we should check this? */
if ((dtmfMode & (H323_DTMF_CISCO | H323_DTMF_RFC2833 | H323_DTMF_SIGNAL)) != 0) {
if (h323debug) {
cout << "\t-- Received user input tone (" << tone << ") from remote" << endl;
}
on_receive_digit(GetCallReference(), tone, (const char *)GetCallToken(), duration);
}
}
void MyH323Connection::OnUserInputString(const PString &value)
{
if (h323debug) {
cout << "\t-- Received user input string (" << value << ") from remote." << endl;
}
on_receive_digit(GetCallReference(), value[0], (const char *)GetCallToken(), 0);
}
void MyH323Connection::OnSendCapabilitySet(H245_TerminalCapabilitySet & pdu)
{
PINDEX i;
H323Connection::OnSendCapabilitySet(pdu);
H245_ArrayOf_CapabilityTableEntry & tables = pdu.m_capabilityTable;
for(i = 0; i < tables.GetSize(); i++)
{
H245_CapabilityTableEntry & entry = tables[i];
if (entry.HasOptionalField(H245_CapabilityTableEntry::e_capability)) {
H245_Capability & cap = entry.m_capability;
if (cap.GetTag() == H245_Capability::e_receiveRTPAudioTelephonyEventCapability) {
H245_AudioTelephonyEventCapability & atec = cap;
atec.m_dynamicRTPPayloadType = dtmfCodec[0];
// on_set_rfc2833_payload(GetCallReference(), (const char *)GetCallToken(), (int)dtmfCodec[0]);
#ifdef PTRACING
if (h323debug) {
cout << "\t-- Receiving RFC2833 on payload " <<
atec.m_dynamicRTPPayloadType << endl;
}
#endif
}
}
}
}
void MyH323Connection::OnSetLocalCapabilities()
{
if (on_setcapabilities)
on_setcapabilities(GetCallReference(), (const char *)callToken);
}
PBoolean MyH323Connection::OnReceivedCapabilitySet(const H323Capabilities & remoteCaps,
const H245_MultiplexCapability * muxCap,
H245_TerminalCapabilitySetReject & reject)
{
struct __codec__ {
unsigned int asterisk_codec;
unsigned int h245_cap;
const char *oid;
const char *formatName;
};
static const struct __codec__ codecs[] = {
{ AST_FORMAT_G723_1, H245_AudioCapability::e_g7231 },
{ AST_FORMAT_GSM, H245_AudioCapability::e_gsmFullRate },
{ AST_FORMAT_ULAW, H245_AudioCapability::e_g711Ulaw64k },
{ AST_FORMAT_ALAW, H245_AudioCapability::e_g711Alaw64k },
{ AST_FORMAT_G729A, H245_AudioCapability::e_g729AnnexA },
{ AST_FORMAT_G729A, H245_AudioCapability::e_g729 },
{ AST_FORMAT_G726_AAL2, H245_AudioCapability::e_nonStandard, NULL, CISCO_G726r32 },
#ifdef AST_FORMAT_MODEM
{ AST_FORMAT_MODEM, H245_DataApplicationCapability_application::e_t38fax },
#endif
{ 0 }
};
#if 0
static const struct __codec__ vcodecs[] = {
#ifdef HAVE_H261
{ AST_FORMAT_H261, H245_VideoCapability::e_h261VideoCapability },
#endif
#ifdef HAVE_H263
{ AST_FORMAT_H263, H245_VideoCapability::e_h263VideoCapability },
#endif
#ifdef HAVE_H264
{ AST_FORMAT_H264, H245_VideoCapability::e_genericVideoCapability, "0.0.8.241.0.0.1" },
#endif
{ 0 }
};
#endif
struct ast_codec_pref prefs;
RTP_DataFrame::PayloadTypes pt;
if (!H323Connection::OnReceivedCapabilitySet(remoteCaps, muxCap, reject)) {
return FALSE;
}
memset(&prefs, 0, sizeof(prefs));
int peer_capabilities = 0;
for (int i = 0; i < remoteCapabilities.GetSize(); ++i) {
unsigned int subType = remoteCapabilities[i].GetSubType();
if (h323debug) {
cout << "Peer capability is " << remoteCapabilities[i] << endl;
}
switch(remoteCapabilities[i].GetMainType()) {
case H323Capability::e_Audio:
for (int x = 0; codecs[x].asterisk_codec > 0; ++x) {
if ((subType == codecs[x].h245_cap) && (!codecs[x].formatName || (!strcmp(codecs[x].formatName, (const char *)remoteCapabilities[i].GetFormatName())))) {
int ast_codec = codecs[x].asterisk_codec;
int ms = 0;
struct ast_format tmpfmt;
if (!(peer_capabilities & ast_format_id_to_old_bitfield((enum ast_format_id) ast_codec))) {
struct ast_format_list format;
ast_codec_pref_append(&prefs, ast_format_set(&tmpfmt, (enum ast_format_id) ast_codec, 0));
format = ast_codec_pref_getsize(&prefs, &tmpfmt);
if ((ast_codec == AST_FORMAT_ALAW) || (ast_codec == AST_FORMAT_ULAW)) {
ms = remoteCapabilities[i].GetTxFramesInPacket();
} else
ms = remoteCapabilities[i].GetTxFramesInPacket() * format.inc_ms;
ast_codec_pref_setsize(&prefs, &tmpfmt, ms);
}
if (h323debug) {
cout << "Found peer capability " << remoteCapabilities[i] << ", Asterisk code is " << ast_codec << ", frame size (in ms) is " << ms << endl;
}
peer_capabilities |= ast_format_id_to_old_bitfield((enum ast_format_id) ast_codec);
}
}
break;
case H323Capability::e_Data:
if (!strcmp((const char *)remoteCapabilities[i].GetFormatName(), CISCO_DTMF_RELAY)) {
pt = remoteCapabilities[i].GetPayloadType();
if ((dtmfMode & H323_DTMF_CISCO) != 0) {
on_set_rfc2833_payload(GetCallReference(), (const char *)GetCallToken(), (int)pt, 1);
// if (sendUserInputMode == SendUserInputAsTone)
// sendUserInputMode = SendUserInputAsInlineRFC2833;
}
#ifdef PTRACING
if (h323debug) {
cout << "\t-- Outbound Cisco RTP DTMF on payload " << pt << endl;
}
#endif
}
break;
case H323Capability::e_UserInput:
if (!strcmp((const char *)remoteCapabilities[i].GetFormatName(), H323_UserInputCapability::SubTypeNames[H323_UserInputCapability::SignalToneRFC2833])) {
pt = remoteCapabilities[i].GetPayloadType();
if ((dtmfMode & H323_DTMF_RFC2833) != 0) {
on_set_rfc2833_payload(GetCallReference(), (const char *)GetCallToken(), (int)pt, 0);
// if (sendUserInputMode == SendUserInputAsTone)
// sendUserInputMode = SendUserInputAsInlineRFC2833;
}
#ifdef PTRACING
if (h323debug) {
cout << "\t-- Outbound RFC2833 on payload " << pt << endl;
}
#endif
}
break;
#if 0
case H323Capability::e_Video:
for (int x = 0; vcodecs[x].asterisk_codec > 0; ++x) {
if (subType == vcodecs[x].h245_cap) {
H245_CapabilityIdentifier *cap = NULL;
H245_GenericCapability y;
if (vcodecs[x].oid) {
cap = new H245_CapabilityIdentifier(H245_CapabilityIdentifier::e_standard);
PASN_ObjectId &object_id = *cap;
object_id = vcodecs[x].oid;
y.m_capabilityIdentifier = *cap;
}
if ((subType != H245_VideoCapability::e_genericVideoCapability) ||
(vcodecs[x].oid && ((const H323GenericVideoCapability &)remoteCapabilities[i]).IsGenericMatch((const H245_GenericCapability)y))) {
if (h323debug) {
cout << "Found peer video capability " << remoteCapabilities[i] << ", Asterisk code is " << vcodecs[x].asterisk_codec << endl;
}
peer_capabilities |= vcodecs[x].asterisk_codec;
}
if (cap)
delete(cap);
}
}
break;
#endif
default:
break;
}
}
#if 0
redir_capabilities &= peer_capabilities;
#endif
if (on_setpeercapabilities)
on_setpeercapabilities(GetCallReference(), (const char *)callToken, peer_capabilities, &prefs);
return TRUE;
}
H323Channel * MyH323Connection::CreateRealTimeLogicalChannel(const H323Capability & capability,
H323Channel::Directions dir,
unsigned sessionID,
const H245_H2250LogicalChannelParameters * /*param*/,
RTP_QOS * /*param*/ )
{
/* Do not open tx channel when transmitter has been paused by empty TCS */
if ((dir == H323Channel::IsTransmitter) && transmitterSidePaused)
return NULL;
return new MyH323_ExternalRTPChannel(*this, capability, dir, sessionID);
}
/** This callback function is invoked once upon creation of each
* channel for an H323 session
*/
PBoolean MyH323Connection::OnStartLogicalChannel(H323Channel & channel)
{
/* Increase the count of channels we have open */
channelsOpen++;
if (h323debug) {
cout << "\t-- Started logical channel: "
<< ((channel.GetDirection() == H323Channel::IsTransmitter) ? "sending " : ((channel.GetDirection() == H323Channel::IsReceiver) ? "receiving " : " "))
<< (const char *)(channel.GetCapability()).GetFormatName() << endl;
cout << "\t\t-- channelsOpen = " << channelsOpen << endl;
}
return connectionState != ShuttingDownConnection;
}
void MyH323Connection::SetCapabilities(int caps, int dtmf_mode, void *_prefs, int pref_codec)
{
PINDEX lastcap = -1; /* last common capability index */
int alreadysent = 0;
int codec;
int x, y;
struct ast_codec_pref *prefs = (struct ast_codec_pref *)_prefs;
struct ast_format_list format;
int frames_per_packet;
struct ast_format tmpfmt;
H323Capability *cap;
localCapabilities.RemoveAll();
/* Add audio codecs in preference order first, then
audio codecs without preference as allowed by mask */
for (y = 0, x = -1; x < 32 + 32; ++x) {
ast_format_clear(&tmpfmt);
if (x < 0)
codec = pref_codec;
else if (y || (!(ast_codec_pref_index(prefs, x, &tmpfmt)))) {
if (!y)
y = 1;
else
y <<= 1;
codec = y;
}
if (tmpfmt.id) {
codec = ast_format_to_old_bitfield(&tmpfmt);
}
if (!(caps & codec) || (alreadysent & codec) || (AST_FORMAT_GET_TYPE(ast_format_id_from_old_bitfield(codec)) != AST_FORMAT_TYPE_AUDIO))
continue;
alreadysent |= codec;
/* format.cur_ms will be set to default if packetization is not explicitly set */
format = ast_codec_pref_getsize(prefs, ast_format_from_old_bitfield(&tmpfmt, codec));
frames_per_packet = (format.inc_ms ? format.cur_ms / format.inc_ms : format.cur_ms);
switch(ast_format_id_from_old_bitfield(codec)) {
#if 0
case AST_FORMAT_SPEEX:
/* Not real sure if Asterisk acutally supports all
of the various different bit rates so add them
all and figure it out later*/
lastcap = localCapabilities.SetCapability(0, 0, new SpeexNarrow2AudioCapability());
lastcap = localCapabilities.SetCapability(0, 0, new SpeexNarrow3AudioCapability());
lastcap = localCapabilities.SetCapability(0, 0, new SpeexNarrow4AudioCapability());
lastcap = localCapabilities.SetCapability(0, 0, new SpeexNarrow5AudioCapability());
lastcap = localCapabilities.SetCapability(0, 0, new SpeexNarrow6AudioCapability());
break;
#endif
case AST_FORMAT_G729A:
AST_G729ACapability *g729aCap;
AST_G729Capability *g729Cap;
lastcap = localCapabilities.SetCapability(0, 0, g729aCap = new AST_G729ACapability(frames_per_packet));
lastcap = localCapabilities.SetCapability(0, 0, g729Cap = new AST_G729Capability(frames_per_packet));
g729aCap->SetTxFramesInPacket(format.cur_ms);
g729Cap->SetTxFramesInPacket(format.cur_ms);
break;
case AST_FORMAT_G723_1:
AST_G7231Capability *g7231Cap;
lastcap = localCapabilities.SetCapability(0, 0, g7231Cap = new AST_G7231Capability(frames_per_packet, TRUE));
g7231Cap->SetTxFramesInPacket(format.cur_ms);
lastcap = localCapabilities.SetCapability(0, 0, g7231Cap = new AST_G7231Capability(frames_per_packet, FALSE));
g7231Cap->SetTxFramesInPacket(format.cur_ms);
break;
case AST_FORMAT_GSM:
AST_GSM0610Capability *gsmCap;
lastcap = localCapabilities.SetCapability(0, 0, gsmCap = new AST_GSM0610Capability(frames_per_packet));
gsmCap->SetTxFramesInPacket(format.cur_ms);
break;
case AST_FORMAT_ULAW:
AST_G711Capability *g711uCap;
lastcap = localCapabilities.SetCapability(0, 0, g711uCap = new AST_G711Capability(format.cur_ms, H323_G711Capability::muLaw));
g711uCap->SetTxFramesInPacket(format.cur_ms);
break;
case AST_FORMAT_ALAW:
AST_G711Capability *g711aCap;
lastcap = localCapabilities.SetCapability(0, 0, g711aCap = new AST_G711Capability(format.cur_ms, H323_G711Capability::ALaw));
g711aCap->SetTxFramesInPacket(format.cur_ms);
break;
case AST_FORMAT_G726_AAL2:
AST_CiscoG726Capability *g726Cap;
lastcap = localCapabilities.SetCapability(0, 0, g726Cap = new AST_CiscoG726Capability(frames_per_packet));
g726Cap->SetTxFramesInPacket(format.cur_ms);
break;
default:
alreadysent &= ~codec;
break;
}
}
cap = new H323_UserInputCapability(H323_UserInputCapability::HookFlashH245);
if (cap && cap->IsUsable(*this)) {
lastcap++;
lastcap = localCapabilities.SetCapability(0, lastcap, cap);
} else {
delete cap; /* Capability is not usable */
}
dtmfMode = dtmf_mode;
if (h323debug) {
cout << "DTMF mode is " << (int)dtmfMode << endl;
}
if (dtmfMode) {
lastcap++;
if (dtmfMode == H323_DTMF_INBAND) {
cap = new H323_UserInputCapability(H323_UserInputCapability::BasicString);
if (cap && cap->IsUsable(*this)) {
lastcap = localCapabilities.SetCapability(0, lastcap, cap);
} else {
delete cap; /* Capability is not usable */
}
sendUserInputMode = SendUserInputAsString;
} else {
if ((dtmfMode & H323_DTMF_RFC2833) != 0) {
cap = new H323_UserInputCapability(H323_UserInputCapability::SignalToneRFC2833);
if (cap && cap->IsUsable(*this))
lastcap = localCapabilities.SetCapability(0, lastcap, cap);
else {
dtmfMode |= H323_DTMF_SIGNAL;
delete cap; /* Capability is not usable */
}
}
if ((dtmfMode & H323_DTMF_CISCO) != 0) {
/* Try Cisco's RTP DTMF relay too, but prefer RFC2833 or h245-signal */
cap = new AST_CiscoDtmfCapability();
if (cap && cap->IsUsable(*this)) {
lastcap = localCapabilities.SetCapability(0, lastcap, cap);
/* We cannot send Cisco RTP DTMFs, use h245-signal instead */
dtmfMode |= H323_DTMF_SIGNAL;
} else {
dtmfMode |= H323_DTMF_SIGNAL;
delete cap; /* Capability is not usable */
}
}
if ((dtmfMode & H323_DTMF_SIGNAL) != 0) {
/* Cisco usually sends DTMF correctly only through h245-alphanumeric or h245-signal */
cap = new H323_UserInputCapability(H323_UserInputCapability::SignalToneH245);
if (cap && cap->IsUsable(*this))
lastcap = localCapabilities.SetCapability(0, lastcap, cap);
else
delete cap; /* Capability is not usable */
}
sendUserInputMode = SendUserInputAsTone; /* RFC2833 transmission handled at Asterisk level */
}
}
if (h323debug) {
cout << "Allowed Codecs for " << GetCallToken() << " (" << GetSignallingChannel()->GetLocalAddress() << "):\n\t" << setprecision(2) << localCapabilities << endl;
}
}
PBoolean MyH323Connection::StartControlChannel(const H225_TransportAddress & h245Address)
{
// Check that it is an IP address, all we support at the moment
if (h245Address.GetTag() != H225_TransportAddress::e_ipAddress
#if P_HAS_IPV6
&& h245Address.GetTag() != H225_TransportAddress::e_ip6Address
#endif
) {
PTRACE(1, "H225\tConnect of H245 failed: Unsupported transport");
return FALSE;
}
// Already have the H245 channel up.
if (controlChannel != NULL)
return TRUE;
PIPSocket::Address addr;
WORD port;
GetSignallingChannel()->GetLocalAddress().GetIpAndPort(addr, port);
if (addr) {
if (h323debug)
cout << "Using " << addr << " for outbound H.245 transport" << endl;
controlChannel = new MyH323TransportTCP(endpoint, addr);
} else
controlChannel = new MyH323TransportTCP(endpoint);
if (!controlChannel->SetRemoteAddress(h245Address)) {
PTRACE(1, "H225\tCould not extract H245 address");
delete controlChannel;
controlChannel = NULL;
return FALSE;
}
if (!controlChannel->Connect()) {
PTRACE(1, "H225\tConnect of H245 failed: " << controlChannel->GetErrorText());
delete controlChannel;
controlChannel = NULL;
return FALSE;
}
controlChannel->StartControlChannel(*this);
return TRUE;
}
#ifdef H323_H450
void MyH323Connection::OnReceivedLocalCallHold(int linkedId)
{
if (on_hold)
on_hold(GetCallReference(), (const char *)GetCallToken(), 1);
}
void MyH323Connection::OnReceivedLocalCallRetrieve(int linkedId)
{
if (on_hold)
on_hold(GetCallReference(), (const char *)GetCallToken(), 0);
}
#endif
void MyH323Connection::MyHoldCall(PBoolean isHold)
{
if (((holdHandling & H323_HOLD_NOTIFY) != 0) || ((holdHandling & H323_HOLD_Q931ONLY) != 0)) {
PBYTEArray x ((const BYTE *)(isHold ? "\xF9" : "\xFA"), 1);
H323SignalPDU signal;
signal.BuildNotify(*this);
signal.GetQ931().SetIE((Q931::InformationElementCodes)39 /* Q931::NotifyIE */, x);
if (h323debug)
cout << "Sending " << (isHold ? "HOLD" : "RETRIEVE") << " notification: " << signal << endl;
if ((holdHandling & H323_HOLD_Q931ONLY) != 0) {
PBYTEArray rawData;
signal.GetQ931().RemoveIE(Q931::UserUserIE);
signal.GetQ931().Encode(rawData);
signallingChannel->WritePDU(rawData);
} else
WriteSignalPDU(signal);
}
#ifdef H323_H450
if ((holdHandling & H323_HOLD_H450) != 0) {
if (isHold)
h4504handler->HoldCall(TRUE);
else if (IsLocalHold())
h4504handler->RetrieveCall();
}
#endif
}
/* 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 */
ast_free(info);
}
/* Get the payload code */
OpalMediaFormat format(capability.GetFormatName(), FALSE);
payloadCode = format.GetPayloadType();
}
MyH323_ExternalRTPChannel::~MyH323_ExternalRTPChannel()
{
if (h323debug) {
cout << "\tExternalRTPChannel Destroyed" << endl;
}
}
PBoolean 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;
}
PBoolean MyH323_ExternalRTPChannel::OnReceivedAckPDU(const H245_H2250LogicalChannelAckParameters & param)
{
if (h323debug) {
cout << " MyH323_ExternalRTPChannel::OnReceivedAckPDU" << endl;
}
if (H323_ExternalRTPChannel::OnReceivedAckPDU(param)) {
GetRemoteAddress(remoteIpAddr, remotePort);
if (h323debug) {
cout << " -- remoteIpAddress: " << remoteIpAddr << endl;
cout << " -- remotePort: " << remotePort << endl;
}
on_start_rtp_channel(connection.GetCallReference(), (const char *)remoteIpAddr.AsString(),
remotePort, (const char *)connection.GetCallToken(), (int)payloadCode);
return TRUE;
}
return FALSE;
}
#ifdef H323_H450
MyH4504Handler::MyH4504Handler(MyH323Connection &_conn, H450xDispatcher &_disp)
:H4504Handler(_conn, _disp)
{
conn = &_conn;
}
void MyH4504Handler::OnReceivedLocalCallHold(int linkedId)
{
if (conn) {
conn->Lock();
conn->OnReceivedLocalCallHold(linkedId);
conn->Unlock();
}
}
void MyH4504Handler::OnReceivedLocalCallRetrieve(int linkedId)
{
if (conn) {
conn->Lock();
conn->OnReceivedLocalCallRetrieve(linkedId);
conn->Unlock();
}
}
#endif
/** 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();
PTrace::SetStream(logstream);
endPoint = new MyH323EndPoint();
}
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,
receive_digit_cb dfunc,
answer_call_cb acfunc,
progress_cb pgfunc,
rfc2833_cb dtmffunc,
hangup_cb hangupfunc,
setcapabilities_cb capabilityfunc,
setpeercapabilities_cb peercapabilityfunc,
onhold_cb holdfunc)
{
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_receive_digit = dfunc;
on_answer_call = acfunc;
on_progress = pgfunc;
on_set_rfc2833_payload = dtmffunc;
on_hangup = hangupfunc;
on_setcapabilities = capabilityfunc;
on_setpeercapabilities = peercapabilityfunc;
on_hold = holdfunc;
}
/**
* Add capability to the capability table of the end point.
*/
int h323_set_capabilities(const char *token, int cap, int dtmf_mode, struct ast_codec_pref *prefs, int pref_codec)
{
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((/*conn->bridging ? conn->redir_capabilities :*/ cap), dtmf_mode, prefs, pref_codec);
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;
};
/* Addition of functions just to make the channel driver compile with H323Plus */
#if VERSION(OPENH323_MAJOR, OPENH323_MINOR, OPENH323_BUILD) > VERSION(1,19,4)
/* Alternate RTP port information for Same NAT */
BOOL MyH323_ExternalRTPChannel::OnReceivedAltPDU(const H245_ArrayOf_GenericInformation & alternate )
{
return TRUE;
}
/* Alternate RTP port information for Same NAT */
BOOL MyH323_ExternalRTPChannel::OnSendingAltPDU(H245_ArrayOf_GenericInformation & alternate) const
{
return TRUE;
}
/* Alternate RTP port information for Same NAT */
void MyH323_ExternalRTPChannel::OnSendOpenAckAlt(H245_ArrayOf_GenericInformation & alternate) const
{
}
/* Alternate RTP port information for Same NAT */
BOOL MyH323_ExternalRTPChannel::OnReceivedAckAltPDU(const H245_ArrayOf_GenericInformation & alternate)
{
return TRUE;
}
#endif
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(PProcess::Current().GetName());
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)
ast_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;
}
void h323_show_version(void)
{
cout << "H.323 version: " << OPENH323_MAJOR << "." << OPENH323_MINOR << "." << OPENH323_BUILD << 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 MyH323TransportUDP(*endPoint))) {
cout << "== Using " << (endPoint->GetGatekeeper())->GetName() << " as our Gatekeeper." << endl;
} else {
cout << "Warning: Could not find a gatekeeper." << endl;
return 1;
}
} else {
rasChannel = new MyH323TransportUDP(*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->MyMakeCall(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" << 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;
}
#if 1
((MyH323Connection *)connection)->MySendProgress();
#else
connection->AnsweringCall(H323Connection::AnswerCallDeferredWithMedia);
#endif
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_soft_hangup(const char *data)
{
PString token(data);
PBoolean 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" << endl;
return;
}
cout << "Native Bridge: them [" << them << "]" << endl;
channel = connection->FindChannel(connection->sessionId, TRUE);
connection->bridging = TRUE;
connection->CloseLogicalChannelNumber(channel->GetNumber());
connection->Unlock();
return;
}
int h323_hold_call(const char *token, int is_hold)
{
MyH323Connection *conn = (MyH323Connection *)endPoint->FindConnectionWithLock(token);
if (!conn) {
cout << "ERROR: No connection found, this is bad" << endl;
return -1;
}
conn->MyHoldCall((PBoolean)is_hold);
conn->Unlock();
return 0;
}
#undef cout
#undef endl
void h323_end_process(void)
{
if (endPoint) {
delete endPoint;
endPoint = NULL;
}
#ifndef SKIP_PWLIB_PIPE_BUG_WORKAROUND
close(_timerChangePipe[0]);
close(_timerChangePipe[1]);
#endif
if (logstream) {
PTrace::SetStream(NULL);
delete logstream;
logstream = NULL;
}
}
} /* extern "C" */
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