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ACDataCheckState.c
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ACDataCheckState.c
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/*******************************************************************************************
* Copyright (c) 2006-7 Laboratorio di Sistemi di Elaborazione e Bioingegneria Informatica *
* Universita' Campus BioMedico - Italy *
* *
* This program 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. *
* *
* 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 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., 59 Temple Place - Suite 330, Boston, *
* MA 02111-1307, USA. *
* *
* In addition, as a special exception, the copyright holders give permission to link the *
* code of portions of this program with the OpenSSL library under certain conditions as *
* described in each individual source file, and distribute linked combinations including *
* the two. You must obey the GNU General Public License in all respects for all of the *
* code used other than OpenSSL. If you modify file(s) with this exception, you may *
* extend this exception to your version of the file(s), but you are not obligated to do *
* so. If you do not wish to do so, delete this exception statement from your version. *
* If you delete this exception statement from all source files in the program, then also *
* delete it here. *
* *
* --------------------------------------------------------------------------------------- *
* Project: Capwap *
* *
* Author : Ludovico Rossi (ludo@bluepixysw.com) *
* Del Moro Andrea (andrea_delmoro@libero.it) *
* Giovannini Federica (giovannini.federica@gmail.com) *
* Massimo Vellucci (m.vellucci@unicampus.it) *
* Mauro Bisson (mauro.bis@gmail.com) *
*******************************************************************************************/
#include "CWAC.h"
static CWBool CWParseChangeStateEventRequestMessage(CWProtocolMessage *pm, int *seqNumPtr,
CWProtocolChangeStateEventRequestValues * valuesPtr);
CWBool ACEnterDataCheck(int WTPIndex, CWProtocolMessage *pm)
{
/*CWProtocolMessage *messages = NULL; */
int seqNum = 0;
CWProtocolChangeStateEventRequestValues *changeStateEvent;
CWLog("\n");
CWDebugLog("######### Status Event #########");
/* Destroy ChangeStatePending timer */
if (!CWErr(CWTimerCancel(&(gWTPs[WTPIndex].currentTimer)))) {
CWCloseThread();
}
if (!(changeStateEvent = ralloc(NULL, CWProtocolChangeStateEventRequestValues)))
return CWErrorRaise(CW_ERROR_OUT_OF_MEMORY, NULL);
if (!(CWParseChangeStateEventRequestMessage(pm, &seqNum, changeStateEvent))) {
/* note: we can kill our thread in case of out-of-memory
* error to free some space.
* we can see this just calling CWErrorGetLastErrorCode()
*/
return CW_FALSE;
}
CWLog("Change State Event Received");
if (!CWSaveChangeStateEventRequestMessage(changeStateEvent, &(gWTPs[WTPIndex].WTPProtocolManager)))
return CW_FALSE;
if (!CWAssembleChangeStateEventResponse(&gWTPs[WTPIndex].messages, gWTPs[WTPIndex].pathMTU, seqNum))
return CW_FALSE;
if (!CWACSendFragments(WTPIndex)) {
return CW_FALSE;
}
/* Start NeighbourDeadInterval timer */
if (!CWErr(CWTimerRequest(gCWNeighborDeadInterval,
&(gWTPs[WTPIndex].thread),
&(gWTPs[WTPIndex].currentTimer), CW_CRITICAL_TIMER_EXPIRED_SIGNAL))) {
CWCloseThread();
}
CWLog("Change State Event Response Sent");
gWTPs[WTPIndex].currentState = CW_ENTER_RUN;
gWTPs[WTPIndex].subState = CW_WAITING_REQUEST;
return CW_TRUE;
}
CWBool CWParseChangeStateEventRequestMessage(CWProtocolMessage *pm, int *seqNumPtr,
CWProtocolChangeStateEventRequestValues * valuesPtr)
{
CWControlHeaderValues controlVal;
int i;
int offsetTillMessages;
assert(pm);
assert(seqNumPtr);
assert(valuesPtr);
CWDebugLog("Parsing Change State Event Request...");
if (!(CWParseControlHeader(pm, &controlVal)))
/* will be handled by the caller */
return CW_FALSE;
/* different type */
if (controlVal.messageTypeValue != CW_MSG_TYPE_VALUE_CHANGE_STATE_EVENT_REQUEST)
return CWErrorRaise(CW_ERROR_INVALID_FORMAT, "Message is not Change State Event Request");
*seqNumPtr = controlVal.seqNum;
/* skip timestamp */
controlVal.msgElemsLen -= CW_CONTROL_HEADER_OFFSET_FOR_MSG_ELEMS;
offsetTillMessages = pm->pos;
valuesPtr->radioOperationalInfo.radiosCount = 0;
/* parse message elements */
while ((pm->pos - offsetTillMessages) < controlVal.msgElemsLen) {
unsigned short int elemType = 0; /* = CWProtocolRetrieve32(pm); */
unsigned short int elemLen = 0; /* = CWProtocolRetrieve16(pm); */
CWParseFormatMsgElem(pm, &elemType, &elemLen);
/*CWDebugLog("Parsing Message Element: %u, elemLen: %u", elemType, elemLen); */
switch (elemType) {
case CW_MSG_ELEMENT_RADIO_OPERAT_STATE_CW_TYPE:
/* just count how many radios we have,
* so we can allocate the array
*/
valuesPtr->radioOperationalInfo.radiosCount++;
CWParseSkipElement(pm, elemLen);
break;
case CW_MSG_ELEMENT_RESULT_CODE_CW_TYPE:
if (!(CWParseResultCode(pm, elemLen, &(valuesPtr->resultCode))))
return CW_FALSE;
break;
default:
CWLog("Unrecognized Message Element(%d) in Discovery response", elemType);
CWParseSkipElement(pm, elemLen);
break;
}
}
CWParseTransportMessageEnd(pm);
if (!(valuesPtr->radioOperationalInfo.radios =
ralloc_array(NULL, CWRadioOperationalInfoValues, valuesPtr->radioOperationalInfo.radiosCount)))
return CWErrorRaise(CW_ERROR_OUT_OF_MEMORY, NULL);
pm->pos = offsetTillMessages;
i = 0;
while (pm->pos - offsetTillMessages < controlVal.msgElemsLen) {
unsigned short int type = 0; /* = CWProtocolRetrieve32(pm); */
unsigned short int len = 0; /* = CWProtocolRetrieve16(pm); */
CWParseFormatMsgElem(pm, &type, &len);
switch (type) {
case CW_MSG_ELEMENT_RADIO_OPERAT_STATE_CW_TYPE:
if (!
(CWParseWTPRadioOperationalState
(pm, len, &(valuesPtr->radioOperationalInfo.radios[i]))))
/* will be handled by the caller */
return CW_FALSE;
i++;
break;
default:
CWParseSkipElement(pm, len);
break;
}
}
CWDebugLog("Change State Event Request Parsed");
return CW_TRUE;
}
CWBool CWAssembleChangeStateEventResponse(CWTransportMessage *tm, int PMTU, int seqNum)
{
CWProtocolMessage msg;
assert(tm);
CWDebugLog("Assembling Change State Event Response...");
if (!CWInitMessage(NULL, &msg, CW_MSG_TYPE_VALUE_CHANGE_STATE_EVENT_RESPONSE, seqNum))
goto cw_assemble_error;
CWFinalizeMessage(&msg);
if (!CWAssembleMessage(tm, PMTU, &msg))
goto cw_assemble_error;
CWDebugLog("Change State Event Response Assembled");
return CW_TRUE;
cw_assemble_error:
CWReleaseMessage(&msg);
return CW_FALSE;
}