diff options
Diffstat (limited to 'trunk/channels/h323/ast_h323.cxx')
| -rw-r--r-- | trunk/channels/h323/ast_h323.cxx | 2637 |
1 files changed, 2637 insertions, 0 deletions
diff --git a/trunk/channels/h323/ast_h323.cxx b/trunk/channels/h323/ast_h323.cxx new file mode 100644 index 000000000..fd7d35dff --- /dev/null +++ b/trunk/channels/h323/ast_h323.cxx @@ -0,0 +1,2637 @@ +#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: $Id$ + */ +#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> +#include <lid.h> +#ifdef H323_H450 +#include "h4501.h" +#include "h4504.h" +#include "h45011.h" +#include "h450pdu.h" +#endif + +#ifdef __cplusplus +extern "C" { +#endif +#include "asterisk/compat.h" +#include "asterisk/logger.h" +#include "asterisk/channel.h" +#include "asterisk/astobj.h" +#ifdef __cplusplus +} +#endif + +#include "chan_h323.h" +#include "ast_h323.h" +#include "cisco-h225.h" +#include "caps_h323.h" + +/* PWlib Required Components */ +#define MAJOR_VERSION 1 +#define MINOR_VERSION 0 +#define BUILD_TYPE ReleaseCode +#define BUILD_NUMBER 0 + +/** 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; + +/** PWLib entry point */ +static MyProcess *localProcess = NULL; + +static int _timerChangePipe[2]; + +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 = 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; + } + 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 + +/* Special class designed to call cleanup code on module destruction */ +class MyH323_Shutdown { + public: + MyH323_Shutdown() { }; + ~MyH323_Shutdown() + { + h323_end_process(); + }; +}; + +MyProcess::MyProcess(): PProcess("The NuFone Networks", + "H.323 Channel Driver for Asterisk", + MAJOR_VERSION, MINOR_VERSION, BUILD_TYPE, BUILD_NUMBER) +{ + /* Call shutdown when module being unload or asterisk has been stopped */ + static MyH323_Shutdown x; + + /* Fix missed one in PWLib */ + PX_firstTimeStart = FALSE; + Resume(); +} + +MyProcess::~MyProcess() +{ + _timerChangePipe[0] = timerChangePipe[0]; + _timerChangePipe[1] = timerChangePipe[1]; +} + +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; +} + +BOOL 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); +} + +BOOL 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); +} + +BOOL MyH323EndPoint::OnConnectionForwarded(H323Connection & connection, + const PString & forwardParty, + const H323SignalPDU & pdu) +{ + if (h323debug) { + cout << "\t-- Call Forwarded to " << forwardParty << endl; + } + return FALSE; +} + +BOOL 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 */ + if (h450dispatcher) + 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; +} + +BOOL MyH323Connection::OnReceivedProgress(const H323SignalPDU &pdu) +{ + BOOL 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; +} + +BOOL 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); +} + +BOOL 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) { + BOOL 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, BOOL 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 { + SetLocalPartyName(PString(opts->cid_num)); + 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, BOOL 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 BOOL 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 BOOL FetchCiscoTunneledInfo(Q931 &q931, const H323SignalPDU &pdu) +{ + BOOL 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)) { + BOOL 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 BOOL EmbedCiscoTunneledInfo(H323SignalPDU &pdu) +{ + const static struct { + Q931::InformationElementCodes ie; + BOOL dontDelete; + } codes[] = { + { Q931::RedirectingNumberIE, }, + { Q931::FacilityIE, }, +// { Q931::CallingPartyNumberIE, TRUE }, + }; + + BOOL res = FALSE; + BOOL notRedirOnly = FALSE; + Q931 tmpQ931; + Q931 &q931 = pdu.GetQ931(); + + for(unsigned i = 0; i < (sizeof(codes) / sizeof(codes[0])); ++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 BOOL FetchQSIGTunneledInfo(Q931 &q931, const H323SignalPDU &pdu) +{ + BOOL 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 BOOL 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 BOOL EmbedQSIGTunneledInfo(H323SignalPDU &pdu) +{ + const static 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 < (sizeof(codes) / sizeof(codes[0])); ++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; + BOOL 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; +} + +BOOL 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 */ +BOOL 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 + +BOOL 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); +} + +BOOL 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(GetLocalPartyName(), (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 BOOL 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); + + BOOL 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; + BOOL 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 + BOOL 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; +} + + +BOOL 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); +} + +BOOL 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); +} + +BOOL 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); +} + +BOOL 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; + if (!(peer_capabilities & ast_codec)) { + struct ast_format_list format; + ast_codec_pref_append(&prefs, ast_codec); + format = ast_codec_pref_getsize(&prefs, ast_codec); + if ((ast_codec == AST_FORMAT_ALAW) || (ast_codec == AST_FORMAT_ULAW)) { + ms = remoteCapabilities[i].GetTxFramesInPacket(); + if (ms > 60) + ms = format.cur_ms; + } else + ms = remoteCapabilities[i].GetTxFramesInPacket() * format.inc_ms; + ast_codec_pref_setsize(&prefs, ast_codec, ms); + } + if (h323debug) { + cout << "Found peer capability " << remoteCapabilities[i] << ", Asterisk code is " << ast_codec << ", frame size (in ms) is " << ms << endl; + } + peer_capabilities |= 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 (h323debug) { + char caps_str[1024], caps2_str[1024]; + ast_codec_pref_string(&prefs, caps2_str, sizeof(caps2_str)); + cout << "Peer capabilities = " << ast_getformatname_multiple(caps_str, sizeof(caps_str), peer_capabilities) + << ", ordered list is " << caps2_str << endl; + } +#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 + */ +BOOL 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; + char caps_str[1024]; + struct ast_codec_pref *prefs = (struct ast_codec_pref *)_prefs; + struct ast_format_list format; + int frames_per_packet; + int max_frames_per_packet; + H323Capability *cap; + + localCapabilities.RemoveAll(); + + if (h323debug) { + cout << "Setting capabilities to " << ast_getformatname_multiple(caps_str, sizeof(caps_str), caps) << endl; + ast_codec_pref_string(prefs, caps_str, sizeof(caps_str)); + cout << "Capabilities in preference order is " << caps_str << endl; + } + /* 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) { + if (x < 0) + codec = pref_codec; + else if (y || (!(codec = ast_codec_pref_index(prefs, x)))) { + if (!y) + y = 1; + else + y <<= 1; + codec = y; + } + if (!(caps & codec) || (alreadysent & codec) || !(codec & AST_FORMAT_AUDIO_MASK)) + continue; + alreadysent |= codec; + format = ast_codec_pref_getsize(prefs, codec); + frames_per_packet = (format.inc_ms ? format.cur_ms / format.inc_ms : format.cur_ms); + max_frames_per_packet = (format.inc_ms ? format.max_ms / format.inc_ms : 0); + switch(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)); + if (max_frames_per_packet) { + g729aCap->SetTxFramesInPacket(max_frames_per_packet); + g729Cap->SetTxFramesInPacket(max_frames_per_packet); + } + break; + case AST_FORMAT_G723_1: + AST_G7231Capability *g7231Cap; + lastcap = localCapabilities.SetCapability(0, 0, g7231Cap = new AST_G7231Capability(frames_per_packet, TRUE)); + if (max_frames_per_packet) + g7231Cap->SetTxFramesInPacket(max_frames_per_packet); + lastcap = localCapabilities.SetCapability(0, 0, g7231Cap = new AST_G7231Capability(frames_per_packet, FALSE)); + if (max_frames_per_packet) + g7231Cap->SetTxFramesInPacket(max_frames_per_packet); + break; + case AST_FORMAT_GSM: + AST_GSM0610Capability *gsmCap; + lastcap = localCapabilities.SetCapability(0, 0, gsmCap = new AST_GSM0610Capability(frames_per_packet)); + if (max_frames_per_packet) + gsmCap->SetTxFramesInPacket(max_frames_per_packet); + break; + case AST_FORMAT_ULAW: + AST_G711Capability *g711uCap; + lastcap = localCapabilities.SetCapability(0, 0, g711uCap = new AST_G711Capability(format.cur_ms, H323_G711Capability::muLaw)); + if (format.max_ms) + g711uCap->SetTxFramesInPacket(format.max_ms); + break; + case AST_FORMAT_ALAW: + AST_G711Capability *g711aCap; + lastcap = localCapabilities.SetCapability(0, 0, g711aCap = new AST_G711Capability(format.cur_ms, H323_G711Capability::ALaw)); + if (format.max_ms) + g711aCap->SetTxFramesInPacket(format.max_ms); + break; + case AST_FORMAT_G726_AAL2: + AST_CiscoG726Capability *g726Cap; + lastcap = localCapabilities.SetCapability(0, 0, g726Cap = new AST_CiscoG726Capability(frames_per_packet)); + if (max_frames_per_packet) + g726Cap->SetTxFramesInPacket(max_frames_per_packet); + 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 if (cap) + 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 if (cap) + 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; + if (cap) + 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; + if (cap) + 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 if (cap) + 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; + } +} + +BOOL 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 H323TransportTCP(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(BOOL 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 */ + 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) +{ + 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(); + 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, + 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; +}; + +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 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); + 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" << 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((BOOL)is_hold); + conn->Unlock(); + return 0; +} + +#undef cout +#undef endl +void h323_end_process(void) +{ + if (endPoint) { + endPoint->ClearAllCalls(); + endPoint->RemoveListener(NULL); + delete endPoint; + endPoint = NULL; + } + if (localProcess) { + delete localProcess; + localProcess = NULL; + close(_timerChangePipe[0]); + close(_timerChangePipe[1]); + } + if (logstream) { + PTrace::SetLevel(0); + PTrace::SetStream(&cout); + delete logstream; + logstream = NULL; + } +} + +} /* extern "C" */ + |