vrr/OpenBTS
2
0
Fork 0
mirror of https://github.com/PentHertz/OpenBTS.git synced 2026-05-02 13:20:05 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

Putting the actual OpenBTS P2.8 source code into the public SVN branch.

Browse source 
git-svn-id: http://wush.net/svn/range/software/public/openbts/trunk@2242 19bc5d8c-e614-43d4-8b26-e1612bc8e597
This commit is contained in:
David Burgess 2011-10-07 02:40:51 +00:00
parent f367b8728b
commit c0a5c1509e
218 changed files with 217437 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

180
Control/ControlCommon.cpp Normal file
View file

@ -0,0 +1,180 @@
/**@file Common-use functions for the control layer. */
/*
* Copyright 2008, 2010 Free Software Foundation, Inc.
*
* This software is distributed under the terms of the GNU Affero Public License.
* See the COPYING file in the main directory for details.
*
* This use of this software may be subject to additional restrictions.
* See the LEGAL file in the main directory for details.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
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. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "ControlCommon.h"
#include "TransactionTable.h"
#include <GSMLogicalChannel.h>
#include <GSML3Message.h>
#include <GSML3CCMessages.h>
#include <GSML3RRMessages.h>
#include <GSML3MMMessages.h>
#include <GSMConfig.h>
#include <SIPEngine.h>
#include <SIPInterface.h>
#include <Logger.h>
#undef WARNING
using namespace std;
using namespace GSM;
using namespace Control;
// FIXME -- getMessage should return an L3Frame, not an L3Message.
// This will mean moving all of the parsing into the control layer.
// FIXME -- This needs an adjustable timeout.
L3Message* Control::getMessage(LogicalChannel *LCH, unsigned SAPI)
{
unsigned timeout_ms = LCH->N200() * T200ms;
L3Frame *rcv = LCH->recv(timeout_ms,SAPI);
if (rcv==NULL) {
LOG(NOTICE) << "timeout";
throw ChannelReadTimeout();
}
LOG(DEBUG) << "received " << *rcv;
Primitive primitive = rcv->primitive();
if (primitive!=DATA) {
LOG(NOTICE) << "unexpected primitive " << primitive;
delete rcv;
throw UnexpectedPrimitive();
}
L3Message *msg = parseL3(*rcv);
delete rcv;
if (msg==NULL) {
LOG(NOTICE) << "unparsed message";
throw UnsupportedMessage();
}
return msg;
}
/* Resolve a mobile ID to an IMSI and return TMSI if it is assigned. */
unsigned Control::resolveIMSI(bool sameLAI, L3MobileIdentity& mobileID, LogicalChannel* LCH)
{
// Returns known or assigned TMSI.
assert(LCH);
LOG(DEBUG) << "resolving mobile ID " << mobileID << ", sameLAI: " << sameLAI;
// IMSI already? See if there's a TMSI already, too.
if (mobileID.type()==IMSIType) return gTMSITable.TMSI(mobileID.digits());
// IMEI? WTF?!
// FIXME -- Should send MM Reject, cause 0x60, "invalid mandatory information".
if (mobileID.type()==IMEIType) throw UnexpectedMessage();
// Must be a TMSI.
// Look in the table to see if it's one we assigned.
unsigned TMSI = mobileID.TMSI();
char* IMSI = NULL;
if (sameLAI) IMSI = gTMSITable.IMSI(TMSI);
if (IMSI) {
// We assigned this TMSI already; the TMSI/IMSI pair is already in the table.
mobileID = L3MobileIdentity(IMSI);
LOG(DEBUG) << "resolving mobile ID (table): " << mobileID;
free(IMSI);
return TMSI;
}
// Not our TMSI.
// Phones are not supposed to do this, but many will.
// If the IMSI's not in the table, ASK for it.
LCH->send(L3IdentityRequest(IMSIType));
// FIXME -- This request times out on T3260, 12 sec. See GSM 04.08 Table 11.2.
L3Message* msg = getMessage(LCH);
L3IdentityResponse *resp = dynamic_cast<L3IdentityResponse*>(msg);
if (!resp) {
if (msg) delete msg;
throw UnexpectedMessage();
}
mobileID = resp->mobileID();
LOG(INFO) << resp;
delete msg;
LOG(DEBUG) << "resolving mobile ID (requested): " << mobileID;
// FIXME -- Should send MM Reject, cause 0x60, "invalid mandatory information".
if (mobileID.type()!=IMSIType) throw UnexpectedMessage();
// Return 0 to indicate that we have not yet assigned our own TMSI for this phone.
return 0;
}
/* Resolve a mobile ID to an IMSI. */
void Control::resolveIMSI(L3MobileIdentity& mobileIdentity, LogicalChannel* LCH)
{
// Are we done already?
if (mobileIdentity.type()==IMSIType) return;
// If we got a TMSI, find the IMSI.
if (mobileIdentity.type()==TMSIType) {
char *IMSI = gTMSITable.IMSI(mobileIdentity.TMSI());
if (IMSI) mobileIdentity = L3MobileIdentity(IMSI);
free(IMSI);
}
// Still no IMSI? Ask for one.
if (mobileIdentity.type()!=IMSIType) {
LOG(NOTICE) << "MOC with no IMSI or valid TMSI. Reqesting IMSI.";
LCH->send(L3IdentityRequest(IMSIType));
// FIXME -- This request times out on T3260, 12 sec. See GSM 04.08 Table 11.2.
L3Message* msg = getMessage(LCH);
L3IdentityResponse *resp = dynamic_cast<L3IdentityResponse*>(msg);
if (!resp) {
if (msg) delete msg;
throw UnexpectedMessage();
}
mobileIdentity = resp->mobileID();
delete msg;
}
// Still no IMSI??
if (mobileIdentity.type()!=IMSIType) {
// FIXME -- This is quick-and-dirty, not following GSM 04.08 5.
LOG(WARNING) << "MOC setup with no IMSI";
// Cause 0x60 "Invalid mandatory information"
LCH->send(L3CMServiceReject(L3RejectCause(0x60)));
LCH->send(L3ChannelRelease());
// The SIP side and transaction record don't exist yet.
// So we're done.
return;
}
}
// vim: ts=4 sw=4