mirror of
https://github.com/RangeNetworks/openbts.git
synced 2025-11-03 21:33:15 +00:00
110 lines
2.6 KiB
C++
110 lines
2.6 KiB
C++
/*
|
|
* Copyright 2008, 2009 Free Software Foundation, Inc.
|
|
*
|
|
* This software is distributed under multiple licenses; see the COPYING file in the main directory for licensing information for this specific distribuion.
|
|
*
|
|
* This use of this software may be subject to additional restrictions.
|
|
* See the LEGAL file in the main directory for details.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
|
|
|
|
*/
|
|
|
|
|
|
|
|
#include "GSMSAPMux.h"
|
|
#include "GSMTransfer.h"
|
|
#include "GSML1FEC.h"
|
|
#include "GSML2LAPDm.h"
|
|
|
|
#include <Logger.h>
|
|
|
|
|
|
using namespace GSM;
|
|
|
|
|
|
void SAPMux::writeHighSide(const L2Frame& frame)
|
|
{
|
|
// The SAP may or may not be present, depending on the channel type.
|
|
OBJLOG(DEBUG) << frame;
|
|
ScopedLock lock(mLock);
|
|
mDownstream->writeHighSide(frame);
|
|
}
|
|
|
|
|
|
|
|
void SAPMux::writeLowSide(const L2Frame& frame)
|
|
{
|
|
OBJLOG(DEBUG) << frame;
|
|
unsigned SAPI;
|
|
|
|
// (pat) Add switch to validate upstream primitives. The upstream only generates a few primitives;
|
|
// the rest are created in L2LAPDm.
|
|
switch (frame.primitive()) {
|
|
case HANDOVER_ACCESS: // Only send this on SAPI 0.
|
|
SAPI = 0;
|
|
break;
|
|
case DATA:
|
|
SAPI = frame.SAPI();
|
|
break;
|
|
case ESTABLISH: // (pat) Do we really want to send this on all SAPI?
|
|
case ERROR:
|
|
// If this is a non-data primitive, copy it out to every SAP.
|
|
for (int i=0; i<4; i++) {
|
|
if (mUpstream[i]) mUpstream[i]->writeLowSide(frame);
|
|
}
|
|
return;
|
|
default:
|
|
case RELEASE: // Sent downstream, but not upstream.
|
|
case UNIT_DATA: // Only used above L2.
|
|
case HARDRELEASE: // Sent downstream, but not upstream.
|
|
// If you get this assertion, make SURE you know what will happen upstream to that primitive.
|
|
assert(0);
|
|
return; // make g++ happy.
|
|
}
|
|
if (mUpstream[SAPI]) {
|
|
mUpstream[SAPI]->writeLowSide(frame);
|
|
} else {
|
|
LOG(WARNING) << "received DATA for unsupported SAP " << SAPI;
|
|
}
|
|
return;
|
|
}
|
|
|
|
|
|
|
|
void LoopbackSAPMux::writeHighSide(const L2Frame& frame)
|
|
{
|
|
OBJLOG(DEBUG) << "Loopback " << frame;
|
|
// Substitute primitive
|
|
L2Frame newFrame(frame);
|
|
unsigned SAPI = frame.SAPI();
|
|
switch (frame.primitive()) {
|
|
case ERROR: SAPI=0; break;
|
|
case RELEASE: return;
|
|
default: break;
|
|
}
|
|
// Because this is a test fixture, as assert here.
|
|
// If this were not a text fixture, we would print a warning
|
|
// and ignore the frame.
|
|
assert(mUpstream[SAPI]);
|
|
ScopedLock lock(mLock);
|
|
mUpstream[SAPI]->writeLowSide(newFrame);
|
|
}
|
|
|
|
|
|
|
|
void LoopbackSAPMux::writeLowSide(const L2Frame& frame)
|
|
{
|
|
assert(mDownstream);
|
|
L2Frame newFrame(frame);
|
|
mDownstream->writeHighSide(newFrame);
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
// vim: ts=4 sw=4
|