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WTPRunState.c
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WTPRunState.c
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/************************************************************************************************
* Copyright (c) 2006-2009 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. *
* *
* -------------------------------------------------------------------------------------------- *
* Project: Capwap *
* *
* Authors : Ludovico Rossi ([email protected]) *
* Del Moro Andrea ([email protected]) *
* Giovannini Federica ([email protected]) *
* Massimo Vellucci ([email protected]) *
* Mauro Bisson ([email protected]) *
* Antonio Davoli ([email protected]) *
************************************************************************************************/
#include <sys/socket.h>
#include <sys/types.h>
#include <linux/if_ether.h>
#include <net/if.h>
#include <sys/ioctl.h>
#include <netpacket/packet.h>
#include "CWWTP.h"
#include "CWVendorPayloads.h"
#include "WTPipcHostapd.h"
#include "WTPmacFrameReceive.h"
#include "common.h"
#include "ieee802_11_defs.h"
#ifdef DMALLOC
#include "../dmalloc-5.5.0/dmalloc.h"
#endif
CWBool CWWTPManageGenericRunMessage(CWProtocolMessage * msgPtr);
CWBool CWWTPCheckForBindingFrame();
CWBool CWWTPCheckForWTPEventRequest();
CWBool CWParseWTPEventResponseMessage(unsigned char *msg, int len, int seqNum, void *values);
CWBool CWSaveWTPEventResponseMessage(void *WTPEventResp);
CWBool CWAssembleEchoRequest(CWProtocolMessage ** messagesPtr,
int *fragmentsNumPtr, int PMTU, int seqNum, CWList msgElemList);
CWBool CWParseConfigurationUpdateRequest(unsigned char *msg,
int len,
CWProtocolConfigurationUpdateRequestValues * valuesPtr,
int *updateRequestType);
CWBool CWSaveConfigurationUpdateRequest(CWProtocolConfigurationUpdateRequestValues * valuesPtr,
CWProtocolResultCode * resultCode, int *updateRequestType);
CWBool CWAssembleConfigurationUpdateResponse(CWProtocolMessage ** messagesPtr,
int *fragmentsNumPtr,
int PMTU,
int seqNum,
CWProtocolResultCode resultCode,
CWProtocolConfigurationUpdateRequestValues values);
CWBool CWSaveClearConfigurationRequest(CWProtocolResultCode * resultCode);
CWBool CWAssembleClearConfigurationResponse(CWProtocolMessage ** messagesPtr,
int *fragmentsNumPtr,
int PMTU, int seqNum, CWProtocolResultCode resultCode);
CWBool CWAssembleStationConfigurationResponse(CWProtocolMessage ** messagesPtr,
int *fragmentsNumPtr,
int PMTU, int seqNum, CWProtocolResultCode resultCode);
CWBool CWAssembleWLANConfigurationResponse(CWProtocolMessage ** messagesPtr,
int *fragmentsNumPtr, int PMTU, int seqNum, CWProtocolResultCode resultCode);
CWBool CWParseStationConfigurationRequest(unsigned char *msg, int len);
CWBool CWParseWLANConfigurationRequest(unsigned char *msg, int len);
void CWConfirmRunStateToACWithEchoRequest();
void CWWTPKeepAliveDataTimerExpiredHandler(void *arg);
CWTimerID gCWHeartBeatTimerID;
CWTimerID gCWKeepAliveTimerID;
CWTimerID gCWNeighborDeadTimerID;
CWBool gNeighborDeadTimerSet = CW_FALSE;
int gEchoInterval = CW_ECHO_INTERVAL_DEFAULT;
int gDataChannelKeepAlive = CW_DATA_CHANNEL_KEEP_ALIVE_DEFAULT;
/*
* Manage DTLS packets.
*/
CW_THREAD_RETURN_TYPE CWWTPReceiveDtlsPacket(void *arg)
{
int readBytes;
unsigned char buf[CW_BUFFER_SIZE];
CWSocket sockDTLS = (long) arg;
CWNetworkLev4Address addr;
char *pData;
CW_REPEAT_FOREVER {
if (!CWErr(CWNetworkReceiveUnsafe(sockDTLS, buf, CW_BUFFER_SIZE - 1, 0, &addr, &readBytes))) {
if (CWErrorGetLastErrorCode() == CW_ERROR_INTERRUPTED)
continue;
break;
}
/* Clone data packet */
CW_CREATE_OBJECT_SIZE_ERR(pData, readBytes, {
CWLog("Out Of Memory");
return NULL;
}
);
memcpy(pData, buf, readBytes);
CWLockSafeList(gPacketReceiveList);
CWAddElementToSafeListTailwitDataFlag(gPacketReceiveList, pData, readBytes, CW_FALSE);
CWUnlockSafeList(gPacketReceiveList);
}
return NULL;
}
extern int gRawSock;
/*
* Manage data packets.
*/
#define HLEN_80211 24
int isEAPOL_Frame(unsigned char *buf, unsigned int len)
{
unsigned char rfc1042_header[6] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
int i;
for (i = 0; i < 6; i++)
if (rfc1042_header[i] != buf[i + HLEN_80211])
return 0;
return 1;
}
CW_THREAD_RETURN_TYPE CWWTPReceiveDataPacket(void *arg)
{
int readBytes;
unsigned char buf[CW_BUFFER_SIZE];
struct sockaddr_ll rawSockaddr;
CWNetworkLev4Address addr;
CWList fragments = NULL;
CWProtocolMessage msgPtr;
CWBool dataFlag = CW_TRUE;
memset(&rawSockaddr, 0, sizeof(rawSockaddr));
rawSockaddr.sll_family = AF_PACKET;
rawSockaddr.sll_protocol = htons(ETH_P_ALL);
rawSockaddr.sll_ifindex = if_nametoindex(gRadioInterfaceName_0);
rawSockaddr.sll_pkttype = PACKET_OTHERHOST;
rawSockaddr.sll_halen = ETH_ALEN;
CW_REPEAT_FOREVER {
if (!CWErr(CWNetworkReceiveUnsafe(gWTPDataSocket, buf, CW_BUFFER_SIZE - 1, 0, &addr, &readBytes))) {
if (CWErrorGetLastErrorCode() == CW_ERROR_INTERRUPTED)
continue;
break;
}
msgPtr.msg = NULL;
msgPtr.offset = 0;
if (!CWProtocolParseFragment(buf, readBytes, &fragments, &msgPtr, &dataFlag, NULL)) {
if (CWErrorGetLastErrorCode()) {
CWErrorCode error;
error = CWErrorGetLastErrorCode();
switch (error) {
case CW_ERROR_SUCCESS:{
CWDebugLog("ERROR: Success");
break;
}
case CW_ERROR_OUT_OF_MEMORY:{
CWDebugLog("ERROR: Out of Memory");
break;
}
case CW_ERROR_WRONG_ARG:{
CWDebugLog("ERROR: Wrong Argument");
break;
}
case CW_ERROR_INTERRUPTED:{
CWDebugLog("ERROR: Interrupted");
break;
}
case CW_ERROR_NEED_RESOURCE:{
CWDebugLog("ERROR: Need Resource");
break;
}
case CW_ERROR_COMUNICATING:{
CWDebugLog("ERROR: Comunicating");
break;
}
case CW_ERROR_CREATING:{
CWDebugLog("ERROR: Creating");
break;
}
case CW_ERROR_GENERAL:{
CWDebugLog("ERROR: General");
break;
}
case CW_ERROR_OPERATION_ABORTED:{
CWDebugLog("ERROR: Operation Aborted");
break;
}
case CW_ERROR_SENDING:{
CWDebugLog("ERROR: Sending");
break;
}
case CW_ERROR_RECEIVING:{
CWDebugLog("ERROR: Receiving");
break;
}
case CW_ERROR_INVALID_FORMAT:{
CWDebugLog("ERROR: Invalid Format");
break;
}
case CW_ERROR_TIME_EXPIRED:{
CWDebugLog("ERROR: Time Expired");
break;
}
case CW_ERROR_NONE:{
CWDebugLog("ERROR: None");
break;
}
}
}
} else {
if (msgPtr.data_msgType == CW_DATA_MSG_KEEP_ALIVE_TYPE) {
unsigned short int elemType = 0;
unsigned short int elemLen = 0;
CWDebugLog("Got KeepAlive len:%d from AC", msgPtr.offset);
msgPtr.offset = 0;
CWParseFormatMsgElem(&msgPtr, &elemType, &elemLen);
} else if (msgPtr.data_msgType == CW_IEEE_802_3_FRAME_TYPE) {
CWDebugLog("Got 802.3 len:%d from AC", msgPtr.offset);
/*MAC - begin */
rawSockaddr.sll_addr[0] = msgPtr.msg[0];
rawSockaddr.sll_addr[1] = msgPtr.msg[1];
rawSockaddr.sll_addr[2] = msgPtr.msg[2];
rawSockaddr.sll_addr[3] = msgPtr.msg[3];
rawSockaddr.sll_addr[4] = msgPtr.msg[4];
rawSockaddr.sll_addr[5] = msgPtr.msg[5];
/*MAC - end */
rawSockaddr.sll_addr[6] = 0x00; /*not used */
rawSockaddr.sll_addr[7] = 0x00; /*not used */
rawSockaddr.sll_hatype = htons(msgPtr.msg[12] << 8 | msgPtr.msg[13]);
sendto(gRawSock, msgPtr.msg, msgPtr.offset, 0, (struct sockaddr *)&rawSockaddr,
sizeof(rawSockaddr));
} else if (msgPtr.data_msgType == CW_IEEE_802_11_FRAME_TYPE) {
struct ieee80211_hdr *hdr;
u16 fc;
hdr = (struct ieee80211_hdr *)msgPtr.msg;
fc = le_to_host16(hdr->frame_control);
if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT
|| isEAPOL_Frame(msgPtr.msg, msgPtr.offset)) {
CWDebugLog("Got 802.11 Management Packet (stype=%d) from AC(hostapd) len:%d",
WLAN_FC_GET_STYPE(fc), msgPtr.offset);
CWWTPsend_data_to_hostapd(msgPtr.msg, msgPtr.offset);
} else if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_DATA) {
if (WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_NULLFUNC) {
CWDebugLog("Got 802.11 Data Packet (stype=%d) from AC(hostapd) len:%d",
WLAN_FC_GET_STYPE(fc), msgPtr.offset);
CWWTPsend_data_to_hostapd(msgPtr.msg, msgPtr.offset);
} else {
CWDebugLog("Got 802.11 Data Packet (stype=%d) from AC(hostapd) len:%d",
WLAN_FC_GET_STYPE(fc), msgPtr.offset);
CWWTPSendFrame(msgPtr.msg, msgPtr.offset);
}
} else {
CWLog("Control/Unknow Type type=%d", WLAN_FC_GET_TYPE(fc));
}
} else {
CWLog("Unknow data_msgType");
}
CW_FREE_PROTOCOL_MESSAGE(msgPtr);
}
}
return NULL;
}
/*
* Manage Run State.
*/
extern int gRawSock;
int wtpInRunState = 0;
CWStateTransition CWWTPEnterRun()
{
int k;
CWLog("\n");
CWLog("######### WTP enters in RUN State #########");
CWWTPKeepAliveDataTimerExpiredHandler(NULL);
for (k = 0; k < MAX_PENDING_REQUEST_MSGS; k++)
CWResetPendingMsgBox(gPendingRequestMsgs + k);
if (!CWErr(CWStartHeartbeatTimer())) {
return CW_ENTER_RESET;
}
wtpInRunState = 1;
CW_REPEAT_FOREVER {
struct timespec timenow;
CWBool bReceivePacket = CW_FALSE;
CWBool bReveiveBinding = CW_FALSE;
if (gWTPNextState == CW_ENTER_RESET) {
wtpInRunState = 0;
CWStopHeartbeatTimer();
return CW_ENTER_RESET;
}
/* Wait packet */
if (gWTPForceACAddress != NULL)
timenow.tv_sec = time(0) + CW_NEIGHBORDEAD_INTERVAL_DEFAULT;
else
timenow.tv_sec = time(0) + CW_NEIGHBORDEAD_RESTART_DISCOVERY_DELTA_DEFAULT; /* greater than NeighborDeadInterval */
timenow.tv_nsec = 0;
CWThreadMutexLock(&gInterfaceMutex);
/*
* if there are no frames from stations
* and no packets from AC...
*/
if ((CWGetCountElementFromSafeList(gPacketReceiveList) == 0)
&& (CWGetCountElementFromSafeList(gFrameList) == 0)) {
/*
* ...wait at most 4 mins for a frame or packet.
*/
if (!CWErr(CWWaitThreadConditionTimeout(&gInterfaceWait, &gInterfaceMutex, &timenow))) {
CWThreadMutexUnlock(&gInterfaceMutex);
if (CWErrorGetLastErrorCode() == CW_ERROR_TIME_EXPIRED) {
CWLog("No Message from AC for a long time... restart Discovery State");
break;
}
continue;
}
}
bReceivePacket = ((CWGetCountElementFromSafeList(gPacketReceiveList) != 0) ? CW_TRUE : CW_FALSE);
bReveiveBinding = ((CWGetCountElementFromSafeList(gFrameList) != 0) ? CW_TRUE : CW_FALSE);
CWThreadMutexUnlock(&gInterfaceMutex);
if (bReceivePacket) {
CWProtocolMessage msg;
msg.msg = NULL;
msg.offset = 0;
if (!(CWReceiveMessage(&msg))) {
CW_FREE_PROTOCOL_MESSAGE(msg);
CWLog("Failure Receiving Response");
wtpInRunState = 0;
return CW_ENTER_RESET;
}
if (!CWErr(CWWTPManageGenericRunMessage(&msg))) {
if (CWErrorGetLastErrorCode() == CW_ERROR_INVALID_FORMAT) {
/* Log and ignore message */
CWErrorHandleLast();
CWLog("--> Received something different from a valid Run Message");
} else {
CW_FREE_PROTOCOL_MESSAGE(msg);
CWLog
("--> Critical Error Managing Generic Run Message... we enter RESET State");
wtpInRunState = 0;
return CW_ENTER_RESET;
}
}
}
if (bReveiveBinding)
CWWTPCheckForBindingFrame();
}
wtpInRunState = 0;
CWStopHeartbeatTimer();
return CW_ENTER_RESET;
}
CWBool CWWTPManageGenericRunMessage(CWProtocolMessage * msgPtr)
{
CWControlHeaderValues controlVal;
if (msgPtr == NULL)
return CWErrorRaise(CW_ERROR_WRONG_ARG, NULL);
msgPtr->offset = 0;
/* will be handled by the caller */
if (!(CWParseControlHeader(msgPtr, &controlVal)))
return CW_FALSE;
int len = controlVal.msgElemsLen - CW_CONTROL_HEADER_OFFSET_FOR_MSG_ELEMS;
int pendingMsgIndex = 0;
pendingMsgIndex = CWFindPendingRequestMsgsBox(gPendingRequestMsgs,
MAX_PENDING_REQUEST_MSGS,
controlVal.messageTypeValue, controlVal.seqNum);
/* we have received a new Request or an Echo Response */
if (pendingMsgIndex < 0) {
CWProtocolMessage *messages = NULL;
int fragmentsNum = 0;
CWBool toSend = CW_FALSE;
switch (controlVal.messageTypeValue) {
case CW_MSG_TYPE_VALUE_CONFIGURE_UPDATE_REQUEST:{
CWProtocolResultCode resultCode = CW_PROTOCOL_FAILURE;
CWProtocolConfigurationUpdateRequestValues values;
int updateRequestType;
/*Update 2009:
check to see if a time-out on session occur...
In case it happens it should go back to CW_ENTER_RESET */
if (!CWResetTimers()) {
CWFreeMessageFragments(messages, fragmentsNum);
CW_FREE_OBJECT(messages);
return CW_FALSE;
}
CWLog("Configuration Update Request received");
/************************************************************************************************
* Update 2009: *
* These two function need an additional parameter (Pointer to updateRequestType) *
* for distinguish between all types of message elements. *
************************************************************************************************/
if (!CWParseConfigurationUpdateRequest
((msgPtr->msg) + (msgPtr->offset), len, &values, &updateRequestType))
return CW_FALSE;
if (!CWSaveConfigurationUpdateRequest(&values, &resultCode, &updateRequestType))
return CW_FALSE;
/*
if ( updateRequestType == BINDING_MSG_ELEMENT_TYPE_OFDM_CONTROL )
break;
*/
/*Update 2009:
Added values (to return stuff with a conf update response) */
if (!CWAssembleConfigurationUpdateResponse(&messages,
&fragmentsNum,
gWTPPathMTU,
controlVal.seqNum, resultCode, values))
return CW_FALSE;
toSend = CW_TRUE;
/*
* BUG-ML01- memory leak fix
*
* 16/10/2009 - Donato Capitella
*/
/*
CWProtocolVendorSpecificValues* psValues = values.protocolValues;
if (psValues->vendorPayloadType == CW_MSG_ELEMENT_VENDOR_SPEC_PAYLOAD_UCI)
CW_FREE_OBJECT(((CWVendorUciValues *)psValues->payload)->response);
CW_FREE_OBJECT(psValues->payload);
CW_FREE_OBJECT(values.protocolValues);
*/
break;
break;
}
case CW_MSG_TYPE_VALUE_CLEAR_CONFIGURATION_REQUEST:{
CWProtocolResultCode resultCode = CW_PROTOCOL_FAILURE;
/*Update 2009:
check to see if a time-out on session occur...
In case it happens it should go back to CW_ENTER_RESET */
if (!CWResetTimers()) {
CWFreeMessageFragments(messages, fragmentsNum);
CW_FREE_OBJECT(messages);
return CW_FALSE;
}
CWLog("Clear Configuration Request received");
/*WTP RESET ITS CONFIGURAION TO MANUFACTURING DEFAULT} */
if (!CWSaveClearConfigurationRequest(&resultCode))
return CW_FALSE;
if (!CWAssembleClearConfigurationResponse
(&messages, &fragmentsNum, gWTPPathMTU, controlVal.seqNum, resultCode))
return CW_FALSE;
toSend = CW_TRUE;
break;
}
case CW_MSG_TYPE_VALUE_STATION_CONFIGURATION_REQUEST:{
CWProtocolResultCode resultCode = CW_PROTOCOL_SUCCESS;
//CWProtocolStationConfigurationRequestValues values; --> da implementare
/*Update 2009:
check to see if a time-out on session occur...
In case it happens it should go back to CW_ENTER_RESET */
if (!CWResetTimers()) {
CWFreeMessageFragments(messages, fragmentsNum);
CW_FREE_OBJECT(messages);
return CW_FALSE;
}
CWLog("Station Configuration Request received");
if (!CWParseStationConfigurationRequest((msgPtr->msg) + (msgPtr->offset), len))
return CW_FALSE;
if (!CWAssembleStationConfigurationResponse
(&messages, &fragmentsNum, gWTPPathMTU, controlVal.seqNum, resultCode))
return CW_FALSE;
toSend = CW_TRUE;
break;
}
case CW_MSG_TYPE_VALUE_WLAN_CONFIGURATION_REQUEST:{
CWProtocolResultCode resultCode = CW_PROTOCOL_SUCCESS;
if (!CWResetTimers()) {
CWFreeMessageFragments(messages, fragmentsNum);
CW_FREE_OBJECT(messages);
return CW_FALSE;
}
CWLog("WLAN Configuration Request received");
if (!CWParseWLANConfigurationRequest((msgPtr->msg) + (msgPtr->offset), len))
return CW_FALSE;
if (!CWAssembleWLANConfigurationResponse
(&messages, &fragmentsNum, gWTPPathMTU, controlVal.seqNum, resultCode))
return CW_FALSE;
toSend = CW_TRUE;
break;
}
case CW_MSG_TYPE_VALUE_ECHO_RESPONSE:{
/*Update 2009:
check to see if a time-out on session occur...
In case it happens it should go back to CW_ENTER_RESET */
if (!CWResetTimers()) {
CWFreeMessageFragments(messages, fragmentsNum);
CW_FREE_OBJECT(messages);
return CW_FALSE;
}
CWLog("Echo Response received");
break;
}
default:
/*
* We can't recognize the received Request so
* we have to send a corresponding response
* containing a failure result code
*/
CWLog("--> Not valid Request in Run State... we send a failure Response");
/*Update 2009:
check to see if a time-out on session occur...
In case it happens it should go back to CW_ENTER_RESET */
if (!CWResetTimers()) {
CWFreeMessageFragments(messages, fragmentsNum);
CW_FREE_OBJECT(messages);
return CW_FALSE;
}
if (!(CWAssembleUnrecognizedMessageResponse(&messages,
&fragmentsNum,
gWTPPathMTU,
controlVal.seqNum,
controlVal.messageTypeValue + 1)))
return CW_FALSE;
toSend = CW_TRUE;
/* return CWErrorRaise(CW_ERROR_INVALID_FORMAT,
* "Received Message not valid in Run State");
*/
}
if (toSend) {
int i;
for (i = 0; i < fragmentsNum; i++) {
#ifdef CW_NO_DTLS
if (!CWNetworkSendUnsafeConnected(gWTPSocket, messages[i].msg, messages[i].offset))
#else
if (!CWSecuritySend(gWTPSession, messages[i].msg, messages[i].offset))
#endif
{
CWLog("Error sending message");
CWFreeMessageFragments(messages, fragmentsNum);
CW_FREE_OBJECT(messages);
return CW_FALSE;
}
}
CWLog("Message Sent\n");
CWFreeMessageFragments(messages, fragmentsNum);
CW_FREE_OBJECT(messages);
/*
* Check if we have to exit due to an update commit request.
*/
if (WTPExitOnUpdateCommit) {
exit(EXIT_SUCCESS);
}
}
} else { /* we have received a Response */
/*Update 2009:
check to see if a time-out on session occur...
In case it happens it should go back to CW_ENTER_RESET */
if (!CWResetTimers())
return CW_FALSE;
switch (controlVal.messageTypeValue) {
case CW_MSG_TYPE_VALUE_CHANGE_STATE_EVENT_RESPONSE:
CWLog("Change State Event Response received");
break;
case CW_MSG_TYPE_VALUE_WTP_EVENT_RESPONSE:
CWLog("WTP Event Response received");
break;
case CW_MSG_TYPE_VALUE_DATA_TRANSFER_RESPONSE:
CWLog("Data Transfer Response received");
break;
default:
/*
* We can't recognize the received Response: we
* ignore the message and log the event.
*/
return CWErrorRaise(CW_ERROR_INVALID_FORMAT, "Received Message not valid in Run State");
}
CWResetPendingMsgBox(&(gPendingRequestMsgs[pendingMsgIndex]));
}
CW_FREE_PROTOCOL_MESSAGE(*msgPtr);
return CW_TRUE;
}
/*______________________________________________________________*/
/* *******************___TIMER HANDLERS___******************* */
void CWWTPHeartBeatTimerExpiredHandler(void *arg)
{
CWList msgElemList = NULL;
CWProtocolMessage *messages = NULL;
int fragmentsNum = 0;
int seqNum;
if (!gNeighborDeadTimerSet) {
if (!CWStartNeighborDeadTimer()) {
CWStopHeartbeatTimer();
CWStopNeighborDeadTimer();
return;
}
}
CWLog("WTP HeartBeat Timer Expired... we send an ECHO Request");
CWLog("\n");
CWLog("#________ Echo Request Message (Run) ________#");
/* Send WTP Event Request */
seqNum = CWGetSeqNum();
if (!CWAssembleEchoRequest(&messages, &fragmentsNum, gWTPPathMTU, seqNum, msgElemList)) {
int i;
CWDebugLog("Failure Assembling Echo Request");
if (messages)
for (i = 0; i < fragmentsNum; i++) {
CW_FREE_PROTOCOL_MESSAGE(messages[i]);
}
CW_FREE_OBJECT(messages);
return;
}
int i;
for (i = 0; i < fragmentsNum; i++) {
#ifdef CW_NO_DTLS
if (!CWNetworkSendUnsafeConnected(gWTPSocket, messages[i].msg, messages[i].offset)) {
#else
if (!CWSecuritySend(gWTPSession, messages[i].msg, messages[i].offset)) {
#endif
CWLog("Failure sending Request");
int k;
for (k = 0; k < fragmentsNum; k++) {
CW_FREE_PROTOCOL_MESSAGE(messages[k]);
}
CW_FREE_OBJECT(messages);
break;
}
}
int k;
for (k = 0; messages && k < fragmentsNum; k++) {
CW_FREE_PROTOCOL_MESSAGE(messages[k]);
}
CW_FREE_OBJECT(messages);
if (!CWStartHeartbeatTimer()) {
return;
}
}
void CWWTPKeepAliveDataTimerExpiredHandler(void *arg)
{
CWProtocolMessage *messages = NULL;
CWProtocolMessage sessionIDmsgElem;
int fragmentsNum = 0;
CWAssembleMsgElemSessionID(&sessionIDmsgElem, &gWTPSessionID[0]);
/* Send WTP Event Request */
if (!CWAssembleDataMessage(&messages, &fragmentsNum, gWTPPathMTU, &sessionIDmsgElem, NULL, CW_PACKET_PLAIN, 1)) {
int i;
CWDebugLog("Failure Assembling KeepAlive Request");
if (messages)
for (i = 0; i < fragmentsNum; i++) {
CW_FREE_PROTOCOL_MESSAGE(messages[i]);
}
CW_FREE_OBJECT(messages);
return;
}
int i;
for (i = 0; i < fragmentsNum; i++) {
if (!CWNetworkSendUnsafeConnected(gWTPDataSocket, messages[i].msg, messages[i].offset)) {
CWLog("Failure sending KeepAlive Request");
int k;
for (k = 0; k < fragmentsNum; k++) {
CW_FREE_PROTOCOL_MESSAGE(messages[k]);
}
CW_FREE_OBJECT(messages);
break;
}
}
int k;
for (k = 0; messages && k < fragmentsNum; k++) {
CW_FREE_PROTOCOL_MESSAGE(messages[k]);
}
CW_FREE_OBJECT(messages);
}
void CWWTPNeighborDeadTimerExpired(void *arg)
{
CWLog("WTP NeighborDead Timer Expired... we consider Peer Dead.");
#ifdef DMALLOC
dmalloc_shutdown();
#endif
return;
}
CWBool CWStartHeartbeatTimer()
{
gCWHeartBeatTimerID = timer_add(gEchoInterval, 0, &CWWTPHeartBeatTimerExpiredHandler, NULL);
if (gCWHeartBeatTimerID == -1)
return CW_FALSE;
CWDebugLog("Echo Heartbeat Timer Started");
gCWKeepAliveTimerID = timer_add(gDataChannelKeepAlive, 0, &CWWTPKeepAliveDataTimerExpiredHandler, NULL);
if (gCWKeepAliveTimerID == -1)
return CW_FALSE;
CWDebugLog("Keepalive Heartbeat Timer Started");
return CW_TRUE;
}
CWBool CWStopHeartbeatTimer()
{
timer_rem(gCWHeartBeatTimerID, NULL);
CWDebugLog("Echo Heartbeat Timer Stopped");
timer_rem(gCWKeepAliveTimerID, NULL);
CWDebugLog("KeepAlive Heartbeat Timer Stopped");
return CW_TRUE;
}
CWBool CWStartNeighborDeadTimer()
{
gCWNeighborDeadTimerID = timer_add(gCWNeighborDeadInterval, 0, &CWWTPNeighborDeadTimerExpired, NULL);
if (gCWNeighborDeadTimerID == -1)
return CW_FALSE;
CWDebugLog("NeighborDead Timer Started");
gNeighborDeadTimerSet = CW_TRUE;
return CW_TRUE;
}
CWBool CWStopNeighborDeadTimer()
{
timer_rem(gCWNeighborDeadTimerID, NULL);
CWDebugLog("NeighborDead Timer Stopped");
gNeighborDeadTimerSet = CW_FALSE;
return CW_TRUE;
}
CWBool CWResetTimers()
{
if (gNeighborDeadTimerSet) {
if (!CWStopNeighborDeadTimer())
return CW_FALSE;
}
if (!CWStopHeartbeatTimer())
return CW_FALSE;
if (!CWStartHeartbeatTimer())
return CW_FALSE;
return CW_TRUE;
}
/*__________________________________________________________________*/
/* *******************___ASSEMBLE FUNCTIONS___******************* */
CWBool CWAssembleEchoRequest(CWProtocolMessage ** messagesPtr,
int *fragmentsNumPtr, int PMTU, int seqNum, CWList msgElemList)
{
CWProtocolMessage *msgElems = NULL;
const int msgElemCount = 0;
CWProtocolMessage *msgElemsBinding = NULL;
const int msgElemBindingCount = 0;
if (messagesPtr == NULL || fragmentsNumPtr == NULL)
return CWErrorRaise(CW_ERROR_WRONG_ARG, NULL);
CWLog("Assembling Echo Request...");
if (!(CWAssembleMessage(messagesPtr,
fragmentsNumPtr,
PMTU,
seqNum,
CW_MSG_TYPE_VALUE_ECHO_REQUEST,
msgElems, msgElemCount, msgElemsBinding, msgElemBindingCount)))
return CW_FALSE;
CWLog("Echo Request Assembled");
return CW_TRUE;
}
CWBool CWAssembleWTPDataTransferRequest(CWProtocolMessage ** messagesPtr, int *fragmentsNumPtr, int PMTU, int seqNum,
CWList msgElemList)
{
CWProtocolMessage *msgElems = NULL;
int msgElemCount = 0;
CWProtocolMessage *msgElemsBinding = NULL;
const int msgElemBindingCount = 0;
int i;
CWListElement *current;
int k = -1;
if (messagesPtr == NULL || fragmentsNumPtr == NULL || msgElemList == NULL)
return CWErrorRaise(CW_ERROR_WRONG_ARG, NULL);
msgElemCount = CWCountElementInList(msgElemList);
if (msgElemCount > 0) {
CW_CREATE_PROTOCOL_MSG_ARRAY_ERR(msgElems, msgElemCount,
return CWErrorRaise(CW_ERROR_OUT_OF_MEMORY, NULL);
);
} else
msgElems = NULL;
CWLog("Assembling WTP Data Transfer Request...");
current = msgElemList;
for (i = 0; i < msgElemCount; i++) {
switch (((CWMsgElemData *) current->data)->type) {
case CW_MSG_ELEMENT_DATA_TRANSFER_DATA_CW_TYPE:
if (!
(CWAssembleMsgElemDataTransferData
(&(msgElems[++k]), ((CWMsgElemData *) current->data)->value)))
goto cw_assemble_error;
break;
/*case CW_MSG_ELEMENT_DATA_TRANSFER_MODE_CW_TYPE:
if (!(CWAssembleMsgElemDataTansferMode(&(msgElems[++k]))))
goto cw_assemble_error;
break; */
default:
goto cw_assemble_error;
break;
}
current = current->next;
}
if (!(CWAssembleMessage(messagesPtr,
fragmentsNumPtr,
PMTU,
seqNum,
CW_MSG_TYPE_VALUE_DATA_TRANSFER_REQUEST,
msgElems, msgElemCount, msgElemsBinding, msgElemBindingCount)))
return CW_FALSE;
CWLog("WTP Data Transfer Request Assembled");
return CW_TRUE;
cw_assemble_error:{
int i;
for (i = 0; i <= k; i++) {
CW_FREE_PROTOCOL_MESSAGE(msgElems[i]);
}
CW_FREE_OBJECT(msgElems);
return CW_FALSE; // error will be handled by the caller
}
}
CWBool CWAssembleWTPEventRequest(CWProtocolMessage ** messagesPtr,
int *fragmentsNumPtr, int PMTU, int seqNum, CWList msgElemList)
{
CWProtocolMessage *msgElems = NULL;
int msgElemCount = 0;
CWProtocolMessage *msgElemsBinding = NULL;
const int msgElemBindingCount = 0;
int i;
CWListElement *current;
int k = -1;
if (messagesPtr == NULL || fragmentsNumPtr == NULL || msgElemList == NULL)
return CWErrorRaise(CW_ERROR_WRONG_ARG, NULL);
msgElemCount = CWCountElementInList(msgElemList);
if (msgElemCount > 0) {
CW_CREATE_PROTOCOL_MSG_ARRAY_ERR(msgElems,
msgElemCount, return CWErrorRaise(CW_ERROR_OUT_OF_MEMORY, NULL);