mirror of
https://github.com/RangeNetworks/openbts.git
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121 lines
4.0 KiB
C++
121 lines
4.0 KiB
C++
/**@file Idle-mode dispatcher for dedicated control channels. */
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/*
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* Copyright 2008, 2009 Free Software Foundation, Inc.
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* Copyright 2011, 2014 Range Networks, Inc.
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*
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* This software is distributed under multiple licenses;
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* see the COPYING file in the main directory for licensing
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* information for this specific distribution.
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*
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* This use of this software may be subject to additional restrictions.
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* See the LEGAL file in the main directory for details.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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*/
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#define LOG_GROUP LogGroup::Control
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#include "ControlCommon.h"
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//#include "L3CallControl.h"
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#include "L3MobilityManagement.h"
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#include "L3StateMachine.h"
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#include "L3LogicalChannel.h"
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#include <GSMConfig.h>
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#include <Logger.h>
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#undef WARNING
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#include <Reporting.h>
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#include <Globals.h>
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using namespace std;
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using namespace GSM;
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using namespace Control;
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/** Example of a closed-loop, persistent-thread control function for the DCCH. */
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// (pat) DCCH is a TCHFACCHLogicalChannel or SDCCHLogicalChannel
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void Control::DCCHDispatcher(L3LogicalChannel *DCCH)
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{
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while (! gBTS.btsShutdown()) {
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// This 'try' is redundant, but we are ultra-cautious here since a mistake means a crash.
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try {
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// Wait for a transaction to start.
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LOG(DEBUG);
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LOG(DEBUG) << "waiting for " << *DCCH << " ESTABLISH or HANDOVER_ACCESS";
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L3Frame *frame = DCCH->waitForEstablishOrHandover();
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LOG(DEBUG) << *DCCH << " received " << *frame;
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gResetWatchdog();
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L3DCCHLoop(DCCH,frame); // This will not return until the channel is released.
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}
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catch (...) {
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LOG(ERR) << "channel killed by unexpected exception ";
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}
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#if 0
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// Catch the various error cases.
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catch (RemovedTransaction except) {
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LOG(ERR) << "attempt to use removed transaciton " << except.transactionID();
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}
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catch (ChannelReadTimeout except) {
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LOG(NOTICE) << "ChannelReadTimeout";
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// Cause 0x03 means "abnormal release, timer expired".
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DCCH->l2sendm(L3ChannelRelease((RRCause)0x03));
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gTransactionTable.remove(except.transactionID());
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}
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catch (UnexpectedPrimitive except) {
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LOG(NOTICE) << "UnexpectedPrimitive";
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// Cause 0x62 means "message type not not compatible with protocol state".
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DCCH->l2sendm(L3ChannelRelease((RRCause)0x62));
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if (except.transactionID()) gTransactionTable.remove(except.transactionID());
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}
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catch (UnexpectedMessage except) {
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LOG(NOTICE) << "UnexpectedMessage";
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// Cause 0x62 means "message type not not compatible with protocol state".
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DCCH->l2sendm(L3ChannelRelease((RRCause)0x62));
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if (except.transactionID()) gTransactionTable.remove(except.transactionID());
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}
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catch (UnsupportedMessage except) {
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LOG(NOTICE) << "UnsupportedMessage";
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// Cause 0x61 means "message type not implemented".
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DCCH->l2sendm(L3ChannelRelease((RRCause)0x61));
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if (except.transactionID()) gTransactionTable.remove(except.transactionID());
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}
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catch (Q931TimerExpired except) {
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LOG(NOTICE) << "Q.931 T3xx timer expired";
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// Cause 0x03 means "abnormal release, timer expired".
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// TODO -- Send diagnostics.
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DCCH->l2sendm(L3ChannelRelease((RRCause)0x03));
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if (except.transactionID()) gTransactionTable.remove(except.transactionID());
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}
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catch (SIP::SIPTimeout except) {
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// FIXME -- The transaction ID should be an argument here.
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LOG(WARNING) << "Uncaught SIPTimeout, will leave a stray transcation";
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// Cause 0x03 means "abnormal release, timer expired".
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DCCH->l2sendm(L3ChannelRelease((RRCause)0x03));
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if (except.transactionID()) gTransactionTable.remove(except.transactionID());
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}
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catch (SIP::SIPError except) {
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// FIXME -- The transaction ID should be an argument here.
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LOG(WARNING) << "Uncaught SIPError, will leave a stray transcation";
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// Cause 0x01 means "abnormal release, unspecified".
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DCCH->l2sendm(L3ChannelRelease((RRCause)0x01));
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if (except.transactionID()) gTransactionTable.remove(except.transactionID());
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}
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#endif
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}
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}
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// vim: ts=4 sw=4
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