/*****************************************************************************
* FUNCTION: SendMgmtMsg
*
* RETURNS: error code
*
* PARAMS: p_header -- pointer to mgmt message header data
* headerLength -- number of bytes in the header
* will be written
* p_data -- pointer to mgmt message data
* dataLength -- number of byte of data
*
* NOTES: Sends a management message
*****************************************************************************/
void SendMgmtMsg(UINT8 *p_header,
UINT8 headerLength,
UINT8 *p_data,
UINT8 dataLength)
{
#if defined(__18CXX)
static UINT32 startTickCount;
static UINT32 maxAllowedTicks;
#else
UINT32 startTickCount;
UINT32 maxAllowedTicks;
#endif
/* cannot send management messages while in WF_ProcessEvent() */
WF_ASSERT(!isInWFProcessEvent());
EnsureWFisAwake();
/* if a Rx Data packet is mounted that has not yet been processed */
if (GetRawWindowState(RAW_RX_ID) == WF_RAW_DATA_MOUNTED)
{
/* save it, so after mgmt response received it can be restored */
PushRawWindow(RAW_RX_ID);
RestoreRxData = TRUE;
}
/* mounts a tx mgmt buffer on the MRF24W when data tx is done */
maxAllowedTicks = TICKS_PER_SECOND / 200; /* 5 ms timeout */
startTickCount = (UINT32)TickGet();
while (!WFisTxMgmtReady() )
{
MACProcess();
/* DEBUG -- REMOVE AFTER FIGURE OUT WHY TIMING OUT (RARELY HAPPENS) */
if (TickGet() - startTickCount >= maxAllowedTicks)
{
/* force flags so WFisTxMgmtReady will return TRUE */
SetRawWindowState(RAW_TX_ID, WF_RAW_UNMOUNTED);
RawWindowReady[RAW_TX_ID] = FALSE;
}
}
/* write out management header */
RawSetByte(RAW_TX_ID, p_header, headerLength);
/* write out data (if any) */
if (dataLength > 0)
{
RawSetByte(RAW_TX_ID, p_data, dataLength);
}
/* send mgmt msg to MRF24W */
SendRAWManagementFrame(headerLength + dataLength);
}
/*********************************************************************
* Function: void StackTask(void)
*
* PreCondition: StackInit() is already called.
*
* Input: None
*
* Output: Stack FSM is executed.
*
* Side Effects: None
*
* Note: This FSM checks for new incoming packets,
* and routes it to appropriate stack components.
* It also performs timed operations.
*
* This function must be called periodically to
* ensure timely responses.
*
********************************************************************/
void StackTask(void)
{
WORD dataCount;
IP_ADDR tempLocalIP;
BYTE cFrameType;
BYTE cIPFrameType;
#if defined( WF_CS_TRIS )
// This task performs low-level MAC processing specific to the MRF24WB0M
MACProcess();
#if defined( STACK_USE_EZ_CONFIG ) && !defined(__18CXX)
WFEasyConfigMgr();
#endif
#if defined(STACK_USE_DHCP_CLIENT)
// Normally, an application would not include DHCP module
// if it is not enabled. But in case some one wants to disable
// DHCP module at run-time, remember to not clear our IP
// address if link is removed.
if(AppConfig.Flags.bIsDHCPEnabled)
{
if(g_DhcpRenew == TRUE)
{
g_DhcpRenew = FALSE;
AppConfig.MyIPAddr.Val = AppConfig.DefaultIPAddr.Val;
AppConfig.MyMask.Val = AppConfig.DefaultMask.Val;
AppConfig.Flags.bInConfigMode = TRUE;
DHCPInit(0);
}
// DHCP must be called all the time even after IP configuration is
// discovered.
// DHCP has to account lease expiration time and renew the configuration
// time.
DHCPTask();
if(DHCPIsBound(0))
AppConfig.Flags.bInConfigMode = FALSE;
}
#endif // STACK_USE_DHCP_CLIENT
#endif
#if defined(STACK_USE_DHCP_CLIENT) && !defined(WF_CS_TRIS)
// Normally, an application would not include DHCP module
// if it is not enabled. But in case some one wants to disable
// DHCP module at run-time, remember to not clear our IP
// address if link is removed.
if(AppConfig.Flags.bIsDHCPEnabled)
{
static BOOL bLastLinkState = FALSE;
BOOL bCurrentLinkState;
bCurrentLinkState = MACIsLinked();
if(bCurrentLinkState != bLastLinkState)
{
bLastLinkState = bCurrentLinkState;
if(!bCurrentLinkState)
{
AppConfig.MyIPAddr.Val = AppConfig.DefaultIPAddr.Val;
AppConfig.MyMask.Val = AppConfig.DefaultMask.Val;
AppConfig.Flags.bInConfigMode = TRUE;
DHCPInit(0);
}
}
// DHCP must be called all the time even after IP configuration is
// discovered.
// DHCP has to account lease expiration time and renew the configuration
// time.
DHCPTask();
if(DHCPIsBound(0))
AppConfig.Flags.bInConfigMode = FALSE;
}
#endif
#if defined (STACK_USE_AUTO_IP)
AutoIPTasks();
#endif
#if defined(STACK_USE_TCP)
// Perform all TCP time related tasks (retransmit, send acknowledge, close connection, etc)
TCPTick();
#endif
#if defined(STACK_USE_UDP)
UDPTask();
#endif
// Process as many incomming packets as we can
while(1)
{
//if using the random module, generate entropy
#if defined(STACK_USE_RANDOM)
RandomAdd(remoteNode.MACAddr.v[5]);
#endif
// We are about to fetch a new packet, make sure that the
// UDP module knows that any old RX data it has laying
// around will now be gone.
#if defined(STACK_USE_UDP)
UDPDiscard();
#endif
// Fetch a packet (throws old one away, if not thrown away
// yet)
if(!MACGetHeader(&remoteNode.MACAddr, &cFrameType))
break;
// When using a WiFi module, filter out all incoming packets that have
// the same source MAC address as our own MAC address. This is to
// prevent receiving and passing our own broadcast packets up to other
// layers and avoid, for example, having our own gratuitous ARPs get
// answered by ourself.
#if defined(WF_CS_TRIS)
if(memcmp((void*)&remoteNode.MACAddr, (void*)&AppConfig.MyMACAddr, 6) == 0u)
continue;
#endif
// Dispatch the packet to the appropriate handler
switch(cFrameType)
{
case MAC_ARP:
ARPProcess();
break;
case MAC_IP:
if(!IPGetHeader(&tempLocalIP, &remoteNode, &cIPFrameType, &dataCount))
break;
#if defined(STACK_USE_ICMP_SERVER) || defined(STACK_USE_ICMP_CLIENT)
if(cIPFrameType == IP_PROT_ICMP)
{
#if defined(STACK_USE_IP_GLEANING)
if(AppConfig.Flags.bInConfigMode && AppConfig.Flags.bIsDHCPEnabled)
{
// According to "IP Gleaning" procedure,
// when we receive an ICMP packet with a valid
// IP address while we are still in configuration
// mode, accept that address as ours and conclude
// configuration mode.
if(tempLocalIP.Val != 0xffffffff)
{
AppConfig.Flags.bInConfigMode = FALSE;
AppConfig.MyIPAddr = tempLocalIP;
}
}
#endif
// Process this ICMP packet if it the destination IP address matches our address or one of the broadcast IP addressees
if( (tempLocalIP.Val == AppConfig.MyIPAddr.Val) ||
(tempLocalIP.Val == 0xFFFFFFFF) ||
#if defined(STACK_USE_ZEROCONF_LINK_LOCAL) || defined(STACK_USE_ZEROCONF_MDNS_SD)
(tempLocalIP.Val == 0xFB0000E0) ||
#endif
(tempLocalIP.Val == ((AppConfig.MyIPAddr.Val & AppConfig.MyMask.Val) | ~AppConfig.MyMask.Val)))
{
ICMPProcess(&remoteNode, dataCount);
}
break;
}
#endif
#if defined(STACK_USE_TCP)
if(cIPFrameType == IP_PROT_TCP)
{
TCPProcess(&remoteNode, &tempLocalIP, dataCount);
break;
}
#endif
#if defined(STACK_USE_UDP)
if(cIPFrameType == IP_PROT_UDP)
{
// Stop processing packets if we came upon a UDP frame with application data in it
if(UDPProcess(&remoteNode, &tempLocalIP, dataCount))
return;
}
#endif
break;
}
}
}