void SipTransaction::sendAuthOKMessage(SipMessage *sipmsg)
{
devassert(mstTranId);
// The tran id is 0 for unregister messages. If one of those gets this far it is a bug.
if (! mstTranId) { return; }
string imsi = sipmsg->msmTo.uriUsername(); // The To: and From: have the same value for a REGISTER message.
// Validate the imsi:
if (imsi.empty()) {
LOG(ERR) << "can't find imsi to store kc";
sendAuthFailMessage(400,"","");
return;
}
if (0 == strncasecmp(imsi.c_str(),"imsi",4)) {
// happiness
} else if (0 == strncasecmp(imsi.c_str(),"tmsi",4)) {
// TODO: In future the user name could be a TMSI.
LOG(ERR) << "SIP REGISTER message with TMSI not supported, userid="<<imsi;
sendAuthFailMessage(400,"","");
return;
} else {
LOG(ERR) << "SIP REGISTER message with invalid IMSI:"<<imsi<<" Message:"<<sipmsg->msmContent;
sendAuthFailMessage(400,"","");
return;
}
DialogAuthMessage *dmsg = new DialogAuthMessage(mstTranId, DialogState::dialogActive,200);
dmsg->dmPAssociatedUri = sipmsg->msmHeaders.paramFind("P-Associated-URI"); // case doesnt matter
dmsg->dmPAssertedIdentity = sipmsg->msmHeaders.paramFind("P-Asserted-Identity");
string authinfo = sipmsg->msmHeaders.paramFind("Authentication-Info");
if (! authinfo.empty()) {
SipParamList params;
parseToParams(authinfo, params);
dmsg->dmKc = params.paramFind("cnonce"); // This is the way SR passes the Kc.
} else {
// There will not be a cnonce if the Registrar does not know it. Dont worry about it.
//LOG(INFO) << "No Authenticate-Info header in SIP REGISTER response:"<<sipmsg->msmContent;
}
if (dmsg->dmKc.empty()) {
dmsg->dmKc = sipmsg->msmHeaders.paramFind("P-GSM-Kc"); // This is the way Yate passes the Kc.
}
WATCHF("CNONCE: imsi=%s Kc=%s\n",imsi.c_str(),dmsg->dmKc.c_str());
if (! dmsg->dmKc.empty()) {
LOG(DEBUG) << "Storing Kc:"<<LOGVAR(imsi)<<LOGVAR(dmsg->dmKc.size()); // We dont put Kc itself in the log.
//gTMSITable.putKc(imsi.c_str()+4, kc, pAssociatedUri, pAssertedIdentity);
} else {
LOG(NOTICE) << "No Kc in SIP REGISTER response:"<<sipmsg->msmContent;
}
//NewTransactionTable_ttAddMessage(mstTranId,dmsg);
SipCallbacks::ttAddMessage(mstTranId,dmsg);
}
static L3Message* parseSACCHMessage(const L3Frame *l3frame)
{
if (!l3frame) return NULL;
LOG(DEBUG) << *l3frame;
Primitive prim = l3frame->primitive();
if ((prim!=L3_DATA) && (prim!=L3_UNIT_DATA)) {
LOG(INFO) << "non-data primitive " << prim;
return NULL;
}
L3Message* message = parseL3(*l3frame);
if (!message) {
LOG(WARNING) << "SACCH received unparsable L3 frame " << *l3frame;
WATCHF("SACCH received unparsable L3 frame PD=%d MTI=%d",l3frame->PD(),l3frame->MTI());
}
return message;
}
// see: Control::MOSMSController
MachineStatus MOSMSMachine::machineRunState(int state, const GSM::L3Message *l3msg, const SIP::DialogMessage *sipmsg)
{
// See GSM 04.11 Arrow Diagram A5 for the transaction (pat) NO, A5 is for GPRS. Closest diagram is F1.
// SIP->Network message.
// Step 1 MS->Network CP-DATA containing RP-DATA with message
// Step 2 Network->MS CP-ACK
// 4.11 6.2.2 State wait-for-RP-ACK, timer TR1M
// Step 3 Network->MS CP-DATA containing RP-ACK or RP-Error
// Step 4 MS->Network CP-ACK
// LAPDm operation, from GSM 04.11, Annex F:
// """
// Case A: Mobile originating short message transfer, no parallel call:
// The mobile station side will initiate SAPI 3 establishment by a SABM command
// on the DCCH after the cipher mode has been set. If no hand over occurs, the
// SAPI 3 link will stay up until the last CP-ACK is received by the MSC, and
// the clearing procedure is invoked.
// """
WATCHF("MOSMS state=%x\n",state);
PROCLOG2(DEBUG,state)<<LOGVAR(l3msg)<<LOGVAR(sipmsg)<<LOGVAR2("imsi",tran()->subscriber());
switch (state) {
case L3CASE_MM(CMServiceRequest): {
timerStart(TCancel,30*1000,TimerAbortTran); // Just in case.
// This is both the start state and a request to start a new MO SMS when one is already in progress, as per GSM 4.11 5.4
const L3CMServiceRequest *req = dynamic_cast<typeof(req)>(l3msg);
const GSM::L3MobileIdentity &mobileID = req->mobileID(); // Reference ok - the SM is going to copy it.
// FIXME: We only identify this the FIRST time.
// The L3IdentifySM can check the MM state and just return.
// FIXME: check provisioning
return machPush(new L3IdentifyMachine(tran(),mobileID, &mIdentifyResult), stateIdentResult);
}
case stateIdentResult: {
if (! mIdentifyResult) {
//const L3CMServiceReject reject = L3CMServiceReject(L3RejectCause::Invalid_Mandatory_Information);
// (pat 6-2014) I think this is wrong, based on comment below, so changing it to the main channel:
// l3sendSms(L3CMServiceReject(L3RejectCause::Invalid_Mandatory_Information),SAPI0);
MMRejectCause rejectCause = L3RejectCause::Invalid_Mandatory_Information;
channel()->l3sendm(L3CMServiceReject(rejectCause),L3_DATA,SAPI0);
return MachineStatus::QuitTran(TermCause::Local(rejectCause));
}
// Let the phone know we're going ahead with the transaction.
// The CMServiceReject is on SAPI 0, not SAPI 3.
PROCLOG(DEBUG) << "sending CMServiceAccept";
// Update 8-6-2013: The nokia does not accept this message on SACCH SAPI 0 for in-call SMS;
// so I am trying moving it to the main channel.
//l3sendSms(GSM::L3CMServiceAccept(),SAPI0);
channel()->l3sendm(GSM::L3CMServiceAccept(),L3_DATA,SAPI0);
gReports.incr("OpenBTS.GSM.SMS.MOSMS.Start");
return MachineStatusOK;
}
#if FIXME
case L3CASE_ERROR: {
// (pat) TODO: Call this on parsel3 error...
// TODO: Also send an error code to the sip side, if any.
l3sendSms(CPError(getL3TI()));
return MachineStatusQuitTran;
}
#endif
case L3CASE_SMS(DATA): {
timerStop(TCancel);
timerStart(TR1M,TR1Mms,TimerAbortTran);
// Step 0: Wait for SAP3 to connect.
// The first read on SAP3 is the ESTABLISH primitive.
// That was done by our caller.
//delete getFrameSMS(LCH,GSM::ESTABLISH);
// Step 1: This is the first message: CP-DATA, containing RP-DATA.
unsigned L3TI = l3msg->TI() | 0x08;
tran()->setL3TI(L3TI);
const CPData *cpdata = dynamic_cast<typeof(cpdata)>(l3msg);
if (cpdata == NULL) { // Currently this is impossible, but maybe someone will change the code later.
l3sendSms(CPError(L3TI));
return MachineStatus::QuitTran(TermCause::Local(L3Cause::SMS_Error));
}
// Step 2: Respond with CP-ACK.
// This just means that we got the message and could parse it.
PROCLOG(DEBUG) << "sending CPAck";
l3sendSms(CPAck(L3TI));
// (pat) The SMS message has already been through L3Message:parseL3, which called SMS::parseSMS(source), which manufactured
// a CPMessage::CPData and called L3Message::parse() which called CPData::parseBody which called L3Message::parseLV,
// which called CPUserData::parseV to leave the result in L3Message::CPMessage::CPData::mData.
// As the mathemetician said after filling 3 blackboards with formulas: It is obvious!
// FIXME -- We need to set the message ref correctly, even if the parsing fails.
// The compiler gives a warning here. Let it. It will remind someone to fix it.
// (pat) Update: If we cant parse far enough to get the ref we send a CPError that does not need the ref.
#if 0
unsigned ref;
bool success = false;
try {
// (pat) hierarchy is L3Message::CPMessage::CPData; L3Message::parse calls CPData::parseBody.
CPData data;
data.parse(*CM);
LOG(INFO) << "CPData " << data;
// Transfer out the RPDU -> TPDU -> delivery.
ref = data.RPDU().reference();
// This handler invokes higher-layer parsers, too.
success = handleRPDU(transaction,data.RPDU());
}
catch (SMSReadError) {
LOG(WARNING) << "SMS parsing failed (above L3)";
// Cause 95, "semantically incorrect message".
LCH->l3sendf(CPData(L3TI,RPError(95,ref)),3); if you ever use this, it should call l3sendSms
delete CM;
throw UnexpectedMessage();
}
catch (GSM::L3ReadError) {
LOG(WARNING) << "SMS parsing failed (in L3)";
delete CM;
throw UnsupportedMessage();
}
delete CM;
#endif
// Step 3
// Send CP-DATA containing message ref and either RP-ACK or RP-Error.
// If we cant parse the message, we send RP-Error immeidately, otherwise we wait for the dialog to finish one way or the other.
const RLFrame &rpdu = cpdata->data().RPDU();
this->mRpduRef = rpdu.reference();
bool success = false;
try {
// This creates the outgoing SipDialog to send the message.
success = handleRPDU(rpdu);
} catch (...) {
LOG(WARNING) << "SMS parsing failed (above L3)";
}
if (! success) {
PROCLOG(INFO) << "sending RPError in CPData";
// Cause 95 is "semantically incorrect message"
l3sendSms(CPData(L3TI,RPError(95,mRpduRef)));
}
mSmsState = MoSmsWaitForAck;
LOG(DEBUG) << "case DATA returning";
return MachineStatusOK;
}
case L3CASE_SIP(dialogBye): { // SIPDialog sends this when the MESSAGE clears.
PROCLOG(INFO) << "SMS peer did not respond properly to dialog message; sending RPAck in CPData";
l3sendSms(CPData(getL3TI(),RPAck(mRpduRef)));
LOG(DEBUG) << "case dialogBye returning";
}
case L3CASE_SIP(dialogFail): {
PROCLOG(INFO) << "sending RPError in CPData";
// TODO: Map the dialog failure state to an RPError state.
// Cause 127 is "internetworking error, unspecified".
// See GSM 04.11 8.2.5.4 Table 8.4.
l3sendSms(CPData(getL3TI(),RPError(127,mRpduRef)));
LOG(DEBUG) << "case dialogFail returning";
}
case L3CASE_SMS(ACK): {
timerStop(TR1M);
// Step 4: Get CP-ACK from the MS.
const CPAck *cpack = dynamic_cast<typeof(cpack)>(l3msg);
PROCLOG(INFO) << "CPAck " << cpack;
gReports.incr("OpenBTS.GSM.SMS.MOSMS.Complete");
/* MOSMS RLLP request */
//if (gConfig.getBool("Control.SMS.QueryRRLP")) {
// Query for RRLP
//if (!sendRRLP(mobileID, LCH)) {
// LOG(INFO) << "RRLP request failed";
//}
//}
// Done.
mSmsState = MoSmsMMConnection;
// TODO: if (set) set->mmCallFinished();
LOG(DEBUG) << "case ACK returning";
// This attach causes any pending MT transactions to start now.
gMMLayer.mmAttachByImsi(channel(),tran()->subscriberIMSI());
return MachineStatus::QuitTran(TermCause::Local(L3Cause::SMS_Success));
}
default:
LOG(DEBUG) << "unexpected state";
return unexpectedState(state,l3msg);
}
}
