static char HTTP_SetBuf(unsigned len)
{
// Clear out any previously buffered data
HTTP_FlushBuf();
// Is the desired maximum amount of data already present?
if(TCPIsGetReady(HTTP.socket) < len)
{
// Search for the CRLF deliminating the end of the line
// to Verify the entire first line is in the FIFO
len = TCPFindROMArray(HTTP.socket, (ROM BYTE*)"\r\n", 2, 0, false);
if(len == 0xFFFFu)
{
// Nothing yet..
if(!TCPGetRxFIFOFree(HTTP.socket))
{// If the FIFO is full, we overflowed
HTTP.StateMachine = SM_HTTP_ERROR;
HTTP.Status = HTTP_OVERFLOW;
HTTP.FileType = HTTP_ERR_LINE_TOO_LONG;
}
return 0;
}
// Include the newlines themselves
len += 2;
}
// Prepare the buffer
HTTP_Buffer.read = &HTTP_Data[HTTP_MAX_DATA_LEN];
HTTP_Buffer.write = HTTP_Data;
HTTP_Buffer.remaining = len;
return 1;
}
static void HTTPHeaderParseCookie(void)
{
WORD lenA, lenB;
// Verify there's enough space
lenB = TCPFindROMArray(sktHTTP, HTTP_CRLF, HTTP_CRLF_LEN, 0, FALSE);
if(lenB >= curHTTP.data + HTTP_MAX_DATA_LEN - curHTTP.ptrData - 2)
{// If not, overflow
curHTTP.httpStatus = HTTP_OVERFLOW;
smHTTP = SM_HTTP_SERVE_HEADERS;
return;
}
// While a CRLF is not immediate, grab a cookie value
while(lenB != 0)
{
// Look for a ';' and use the shorter of that or a CRLF
lenA = TCPFind(sktHTTP, ';', 0, FALSE);
// Read to the terminator
curHTTP.ptrData += TCPGetArray(sktHTTP, curHTTP.ptrData, mMIN(lenA, lenB));
// Insert an & to anticipate another cookie
*(curHTTP.ptrData++) = '&';
// If semicolon, trash it and whitespace
if(lenA < lenB)
{
TCPGet(sktHTTP, NULL);
while(TCPFind(sktHTTP, ' ', 0, FALSE) == 0)
TCPGet(sktHTTP, NULL);
}
// Find the new distance to the CRLF
lenB = TCPFindROMArray(sktHTTP, HTTP_CRLF, HTTP_CRLF_LEN, 0, FALSE);
}
return;
}
static void HTTPHeaderParseContentLength(void)
{
WORD len;
BYTE buf[10];
// Read up to the CRLF (max 9 bytes or ~1GB)
len = TCPFindROMArray(sktHTTP, HTTP_CRLF, HTTP_CRLF_LEN, 0, FALSE);
len = TCPGetArray(sktHTTP, buf, len);
buf[len] = '\0';
curHTTP.byteCount = atol((char*)buf);
return;
}
static void HTTPHeaderParseAuthorization(void)
{
WORD len;
BYTE buf[40];
BYTE *ptrBuf;
// If auth processing is not required, return
if(curHTTP.isAuthorized & 0x80)
return;
// Clear the auth type ("BASIC ")
TCPGetArray(sktHTTP, NULL, 6);
// Find the terminating CRLF and make sure it's a multiple of four
len = TCPFindROMArray(sktHTTP, HTTP_CRLF, HTTP_CRLF_LEN, 0, FALSE);
len += 3;
len &= 0xfc;
len = mMIN(len, sizeof(buf)-4);
// Read in 4 bytes at a time and decode (slower, but saves RAM)
for(ptrBuf = buf; len > 0; len-=4, ptrBuf+=3)
{
TCPGetArray(sktHTTP, ptrBuf, 4);
Base64Decode(ptrBuf, 4, ptrBuf, 3);
}
// Null terminate both, and make sure there's at least two terminators
*ptrBuf = '\0';
for(len = 0, ptrBuf = buf; len < sizeof(buf); len++, ptrBuf++)
if(*ptrBuf == ':')
break;
*(ptrBuf++) = '\0';
// Verify credentials
curHTTP.isAuthorized = HTTPAuthenticate(buf, ptrBuf, NULL);
return;
}
/****************************************************************************
Function:
void DDNSTask(void)
Summary:
Dynamic DNS client task/state machine.
Description:
This function performs the background tasks of the Dynamic DNS Client.
Once the DDNSPointers structure is configured, this task attempt to
update the Dynamic DNS hostname on a periodic schedule.
The task first accesses the CheckIP server to determine the device's
current external IP address. If the IP address has changed, it
issues an update command to the dynamic DNS service to propagate the
change. This sequence executes whenever dwUpdateAt elapses, which by
default is every 10 minutes, or when an update is forced.
Precondition:
DDNSInit() has been called.
Parameters:
None
Returns:
None
Remarks:
This function acts as a task (similar to one in an RTOS). It
performs its task in a co-operative manner, and the main application
must call this function periodically to ensure that its tasks get
executed in a timely fashion.
***************************************************************************/
void DDNSTask(void)
{
BYTE i;
static TICK Timer;
static TCP_SOCKET MySocket = INVALID_SOCKET;
static char ROM * ROMStrPtr;
static char * RAMStrPtr;
static BYTE vBuffer[16];
WORD wPos;
static IP_ADDR ipParsed;
static enum
{
SM_IDLE = 0u,
SM_BEGIN_CHECKIP, //0x1
SM_CHECKIP_SKT_OBTAINED, //0x2
SM_CHECKIP_FIND_DELIMITER, //0x3
SM_CHECKIP_FIND_ADDRESS, //0x4
SM_CHECKIP_DISCONNECT, //0x5
SM_IP_UPDATE_HOME, //0x6
SM_IP_UPDATE_SKT_OBTAINED, //0x7
/*
HTTP request msg is divided into 6 parts
SM_IP_UPDATE_REQ_A,B,C,D,E,F as the tcp ip tx
buffer is only able to carry 200 bytes at a time.
*/
SM_IP_UPDATE_REQ_A, //0x8
SM_IP_UPDATE_REQ_B, //0x9
SM_IP_UPDATE_REQ_C, //0xa
SM_IP_UPDATE_REQ_D, //0xb
SM_IP_UPDATE_REQ_E, //0xc
SM_IP_UPDATE_REQ_F, //0xd
SM_IPUPDATE_FIND_RESPONSE, //0xe
SM_IPUPDATE_PARSE_RESPONSE, //0xf
SM_IPUDATE_DISCONNECT, //0x10
SM_DONE, // Done, try again in 10 minutes
SM_SOFT_ERROR, // Soft error, try again in 30 seconds
SM_SYSTEM_ERROR // System error, try again in 30 minutes
} smDDNS = SM_IDLE;
switch(smDDNS)
{
case SM_IDLE:
// Wait for timeout to begin IP check
if((LONG)(TickGet() - dwUpdateAt) < 0)
break;
// Otherwise, continue to next state
smDDNS = SM_BEGIN_CHECKIP;
case SM_BEGIN_CHECKIP:
// If a fatal error has occurred, abort to the SM_DONE state and keep
// the error message.
if(lastStatus >= DDNS_STATUS_ABUSE && lastStatus <= DDNS_STATUS_911)
{
smDDNS = SM_DONE;
break;
}
// If DDNSClient is not properly configured, abort
if(
// Verify that each pointer is not null, and is not empty
(DDNSClient.ROMPointers.Host && (!DDNSClient.Host.szROM || *DDNSClient.Host.szROM == '\0') ) ||
(!DDNSClient.ROMPointers.Host && (!DDNSClient.Host.szRAM || *DDNSClient.Host.szRAM == '\0') ) ||
(DDNSClient.ROMPointers.Username && (!DDNSClient.Username.szROM || *DDNSClient.Username.szROM == '\0') ) ||
(!DDNSClient.ROMPointers.Username && (!DDNSClient.Username.szRAM || *DDNSClient.Username.szRAM == '\0') ) ||
(DDNSClient.ROMPointers.Password && (!DDNSClient.Password.szROM || *DDNSClient.Password.szROM == '\0') ) ||
(!DDNSClient.ROMPointers.Password && (!DDNSClient.Password.szRAM || *DDNSClient.Password.szRAM == '\0') ) ||
(DDNSClient.ROMPointers.CheckIPServer && (!DDNSClient.CheckIPServer.szROM || *DDNSClient.CheckIPServer.szROM == '\0') ) ||
(!DDNSClient.ROMPointers.CheckIPServer && (!DDNSClient.CheckIPServer.szRAM || *DDNSClient.CheckIPServer.szRAM == '\0') ) ||
(DDNSClient.ROMPointers.UpdateServer && (!DDNSClient.UpdateServer.szROM || *DDNSClient.UpdateServer.szROM == '\0') ) ||
(!DDNSClient.ROMPointers.UpdateServer && (!DDNSClient.UpdateServer.szRAM || *DDNSClient.UpdateServer.szRAM == '\0') )
)
{
smDDNS = SM_SOFT_ERROR;
lastStatus = DDNS_STATUS_INVALID;
break;
}
// Start with an invalidated IP String
vBuffer[0] = '\0';
// Connect a socket to the remote server
if(DDNSClient.ROMPointers.CheckIPServer)
{
MySocket = TCPOpen((DWORD)(ROM_PTR_BASE)DDNSClient.CheckIPServer.szROM, TCP_OPEN_ROM_HOST,
DDNSClient.CheckIPPort, TCP_PURPOSE_DEFAULT);
}
else
{
MySocket = TCPOpen((DWORD)(PTR_BASE)DDNSClient.CheckIPServer.szRAM, TCP_OPEN_RAM_HOST,
DDNSClient.CheckIPPort, TCP_PURPOSE_DEFAULT);
}
// If no socket available, try again on next loop
if(MySocket == INVALID_SOCKET)
break;
smDDNS++;
Timer = TickGet();
break;
case SM_CHECKIP_SKT_OBTAINED:
// Wait for the remote server to accept our connection request
if(!TCPIsConnected(MySocket))
{
// Time out if too much time is spent in this state
if(TickGet()-Timer > 6*TICK_SECOND)
{
// Close the socket so it can be used by other modules
// We will retry soon
TCPDisconnect(MySocket);
MySocket = INVALID_SOCKET;
lastStatus = DDNS_STATUS_CHECKIP_ERROR;
smDDNS = SM_SOFT_ERROR;
}
break;
}
Timer = TickGet();
// Make certain the socket can be written to
if(TCPIsPutReady(MySocket) < 125)//125 = size of TCP Tx buffer
break;
// Transmit the request to the server
TCPPutROMString(MySocket, (ROM BYTE*)"GET / HTTP/1.0\r\nHost: ");
if(DDNSClient.ROMPointers.CheckIPServer)
{
TCPPutROMString(MySocket, DDNSClient.CheckIPServer.szROM);
}
else
{
TCPPutString(MySocket, DDNSClient.CheckIPServer.szRAM);
}
TCPPutROMString(MySocket, (ROM BYTE*)"\r\nConnection: close\r\n\r\n");
// Send the packet
TCPFlush(MySocket);
smDDNS++;
break;
case SM_CHECKIP_FIND_DELIMITER:
// Check if remote node is still connected. If not, force to the disconnect state,
// but don't break because data may still be waiting.
if(!TCPIsConnected(MySocket) || TickGet() - Timer > 6*TICK_SECOND)
smDDNS = SM_CHECKIP_DISCONNECT;
// Search out the "Address: " delimiter in the response
wPos = TCPFindROMArray(MySocket, (ROM BYTE*)"Address: ", 9, 0, FALSE);
// If not yet found, clear as much as possible and break
if(wPos == 0xffff)
{
wPos = TCPIsGetReady(MySocket);
if(wPos > 9)
TCPGetArray(MySocket, NULL, wPos - 9);
break;
}
// Clear up to and past that string
TCPGetArray(MySocket, NULL, wPos + 9);
// Continue on to read the IP
Timer = TickGet();
smDDNS++;
case SM_CHECKIP_FIND_ADDRESS:
// Check if remote node is still connected. If not, force to the disconnect state,
// but don't break because data may still be waiting.
if(!TCPIsConnected(MySocket) || TickGet() - Timer > 6*TICK_SECOND)
smDDNS = SM_CHECKIP_DISCONNECT;
// Search out the "</body>" delimiter in the response
wPos = TCPFindROMArray(MySocket, (ROM BYTE*)"</body>", 7, 0, FALSE);
// If not yet found, break
if(wPos == 0xffff)
break;
// Read and terminate that string as the IP address (preventing buffer overflows)
if(wPos > 15)
wPos = 15;
TCPGetArray(MySocket, vBuffer, wPos);
vBuffer[wPos] = '\0';
// Parse the IP address that was read, invalidating on failure
if(!StringToIPAddress(vBuffer, &ipParsed))
vBuffer[0] = '\0';
// Continue on to close the socket
case SM_CHECKIP_DISCONNECT:
// Close the socket
TCPDisconnect(MySocket);
MySocket = INVALID_SOCKET;
// Determine if an update is necessary
if(vBuffer[0] == '\0')
{// CheckIP Failed
lastStatus = DDNS_STATUS_CHECKIP_ERROR;
smDDNS = SM_SOFT_ERROR;
break;
}
if( (ipParsed.Val ==lastKnownIP.Val) && (!bForceUpdate))
{
// IP address has not changed and no update is forced
lastStatus = DDNS_STATUS_UNCHANGED;
smDDNS = SM_DONE;
break;
}
// Need to perform an update
lastKnownIP = ipParsed;
bForceUpdate = FALSE;
smDDNS++;
break;
case SM_IP_UPDATE_HOME:
// Connect a socket to the remote server
if(DDNSClient.ROMPointers.UpdateServer)
{
MySocket = TCPOpen((DWORD)(ROM_PTR_BASE)DDNSClient.UpdateServer.szROM, TCP_OPEN_ROM_HOST,
DDNSClient.UpdatePort, TCP_PURPOSE_DEFAULT);
}
else
{
MySocket = TCPOpen((DWORD)(PTR_BASE)DDNSClient.UpdateServer.szRAM, TCP_OPEN_RAM_HOST,
DDNSClient.UpdatePort, TCP_PURPOSE_DEFAULT);
}
// If no socket is available, try again on the next loop
if(MySocket == INVALID_SOCKET)
break;
// Move on to the next state
smDDNS++;
Timer = TickGet();
break;
case SM_IP_UPDATE_SKT_OBTAINED:
// Wait for the remote server to accept our connection request
if(!TCPIsConnected(MySocket))
{
// Time out if too much time is spent in this state
if(TickGet() - Timer > 6*TICK_SECOND)
{
// Close the socket so it can be used by other modules
// We will try again immediately
TCPDisconnect(MySocket);
MySocket = INVALID_SOCKET;
lastStatus = DDNS_STATUS_UPDATE_ERROR;
smDDNS--;
}
break;
}
// Reset timer and begin sending the request
Timer = TickGet();
smDDNS++;
// No break needed...try to send first bit immediately.
case SM_IP_UPDATE_REQ_A:
// Check for lost connections or timeouts
if(!TCPIsConnected(MySocket) || (TickGet() - Timer > 10*TICK_SECOND))
{
lastStatus = DDNS_STATUS_UPDATE_ERROR;
smDDNS = SM_IPUDATE_DISCONNECT;
break;
}
if(TCPIsPutReady(MySocket) < 25u) // 25 =~ 16+9
break;
TCPPutROMString(MySocket, (ROM BYTE*)"GET /nic/update?hostname=");
smDDNS++;
// No break needed...try to send next bit immediately.
case SM_IP_UPDATE_REQ_B:
// Check for lost connections or timeouts
if(!TCPIsConnected(MySocket) || (TickGet() - Timer > 10*TICK_SECOND))
{
lastStatus = DDNS_STATUS_UPDATE_ERROR;
smDDNS = SM_IPUDATE_DISCONNECT;
break;
}
// Try to write, verifying that space is available first
if(DDNSClient.ROMPointers.Host)
{
if(TCPIsPutReady(MySocket) < strlenpgm((ROM char*)DDNSClient.Host.szROM))
break;
TCPPutROMString(MySocket,DDNSClient.Host.szROM);
}
else
{
if(TCPIsPutReady(MySocket) < strlen((char*)DDNSClient.Host.szRAM))
break;
TCPPutString(MySocket,DDNSClient.Host.szRAM);
}
smDDNS++;
// No break needed...try to send next bit immediately.
case SM_IP_UPDATE_REQ_C:
// Check for lost connections or timeouts
if(!TCPIsConnected(MySocket) || TickGet() - Timer > 10*TICK_SECOND)
{
lastStatus = DDNS_STATUS_UPDATE_ERROR;
smDDNS = SM_IPUDATE_DISCONNECT;
break;
}
if(TCPIsPutReady(MySocket) < 70u)
break;
TCPPutROMString(MySocket, (ROM BYTE*)"&myip=");
TCPPutString(MySocket, vBuffer);
TCPPutROMString(MySocket, (ROM BYTE*)"&wildcard=NOCHG&mx=NOCHG&backmx=NOCHG HTTP/1.0");
TCPFlush(MySocket);
smDDNS++;
// No break needed...try to send next bit immediately.
case SM_IP_UPDATE_REQ_D:
// Check for lost connections or timeouts
if(!TCPIsConnected(MySocket) || TickGet() - Timer > 10*TICK_SECOND)
{
lastStatus = DDNS_STATUS_UPDATE_ERROR;
smDDNS = SM_IPUDATE_DISCONNECT;
break;
}
if(TCPIsPutReady(MySocket) < 131u) // 131 =~ 8+23 + dynamic dns server hostname
break;
TCPPutROMString(MySocket, (ROM BYTE*)"\r\nHost: ");//8
if(DDNSClient.ROMPointers.UpdateServer)
TCPPutROMString(MySocket,DDNSClient.UpdateServer.szROM);
else
TCPPutString(MySocket,DDNSClient.UpdateServer.szRAM);
TCPPutROMString(MySocket, (ROM BYTE*)"\r\nAuthorization: Basic ");//23
TCPFlush(MySocket);
smDDNS++;
// No break needed...try to send the next bit immediately.
case SM_IP_UPDATE_REQ_E:
// Check for lost connections or timeouts
if(!TCPIsConnected(MySocket) || TickGet() - Timer > 6*TICK_SECOND)
{
lastStatus = DDNS_STATUS_UPDATE_ERROR;
smDDNS = SM_IPUDATE_DISCONNECT;
break;
}
// User name and passwords for DynDNS.org can each be up to 24 characters
// Base64 encoded data is always at least 25% bigger than the original
if(TCPIsPutReady(MySocket) < 100u)
break;
if(DDNSClient.ROMPointers.Username)
{
ROMStrPtr = (ROM char*)DDNSClient.Username.szROM;
wPos = strlenpgm(ROMStrPtr);
}
else
{
RAMStrPtr = (char*)DDNSClient.Username.szRAM;
wPos = strlen((char*)RAMStrPtr);
}
i = 0;
while(wPos)
{
while(i < wPos && i < 3u)
{
if(DDNSClient.ROMPointers.Username)
vBuffer[i] = *ROMStrPtr++;
else
vBuffer[i] = *RAMStrPtr++;
i++;
}
wPos -= i;
if(i == 3u)
{
Base64Encode(vBuffer, i, vBuffer, 4);
TCPPutArray(MySocket, vBuffer, 4);
i = 0;
}
}
if(DDNSClient.ROMPointers.Password)
{
ROMStrPtr = (ROM char*)DDNSClient.Password.szROM;
wPos = strlenpgm(ROMStrPtr);
}
else
{
RAMStrPtr = (char*)DDNSClient.Password.szRAM;
wPos = strlen((char*)RAMStrPtr);
}
// Increment for the ':' separator and i for bytes left in username
wPos += i + 1;
vBuffer[i++] = ':';
while(wPos)
{
while(i < wPos && i < 3u)
{
if(DDNSClient.ROMPointers.Password)
vBuffer[i] = *ROMStrPtr++;
else
vBuffer[i] = *RAMStrPtr++;
i++;
}
wPos -= i;
Base64Encode(vBuffer, i, vBuffer, 4);
TCPPutArray(MySocket, vBuffer, 4);
i = 0;
}
TCPFlush(MySocket);
smDDNS++;
break;
case SM_IP_UPDATE_REQ_F:
// Check for lost connections or timeouts
if(!TCPIsConnected(MySocket) || TickGet() - Timer > 10*TICK_SECOND)
{
lastStatus = DDNS_STATUS_UPDATE_ERROR;
smDDNS = SM_IPUDATE_DISCONNECT;
break;
}
if(TCPIsPutReady(MySocket) < 50)
break;
TCPPutROMString(MySocket, (ROM BYTE*)"\r\nUser-Agent: Microchip - TCPIPSTACK - "VERSION"\r\n\r\n");
TCPFlush(MySocket);
smDDNS++;
// Reset the timer to wait for a response
Timer = TickGet();
break;
case SM_IPUPDATE_FIND_RESPONSE:
// Locate the response string
// Wait up to 10 seconds for a response
if(TickGet() - Timer > 10*TICK_SECOND)
{
lastStatus = DDNS_STATUS_UPDATE_ERROR;
smDDNS = SM_IPUDATE_DISCONNECT;
break;
}
// According to HTTP, the response will start after the two CRLFs
wPos = TCPFindROMArray(MySocket, (ROM BYTE*)"\r\n\r\n", 4, 0, FALSE);
// If not yet found, eliminate everything up to
if(wPos == 0xffff)
{
wPos = TCPIsGetReady(MySocket);
if(wPos > 4)
TCPGetArray(MySocket, NULL, wPos - 4);
break;
}
TCPGetArray(MySocket, NULL, wPos+4);
smDDNS++;
// No break...continue to next state immediately
case SM_IPUPDATE_PARSE_RESPONSE:
// Try to parse the response text
// Wait up to 10 seconds for the remote server to disconnect
// so we know all data has been received
if(TCPIsConnected(MySocket) && TickGet() - Timer < 10*TICK_SECOND)
break;
// Read the response code
wPos = TCPIsGetReady(MySocket);
if(wPos > sizeof(vBuffer) - 1)
wPos = sizeof(vBuffer) - 1;
wPos = TCPGetArray(MySocket, vBuffer, wPos);
vBuffer[wPos] = '\0';
for(i = 0; i < sizeof(vBuffer); i++)
if(vBuffer[i] == ' ')
vBuffer[i] = '\0';
for(lastStatus = 0; lastStatus <= DDNS_STATUS_UPDATE_ERROR; lastStatus++)
if(!strcmppgm2ram((char*)vBuffer, (ROM char*)_updateIpSrvrResponse[lastStatus]))
break;
smDDNS++;
// No break...continue to finalization
case SM_IPUDATE_DISCONNECT:
// Close the socket so it can be used by other modules.
if(MySocket != INVALID_SOCKET)
{
TCPDisconnect(MySocket);
MySocket = INVALID_SOCKET;
}
// Determine what to do based on status
if(lastStatus <= DDNS_STATUS_NUMHOST || lastStatus == DDNS_STATUS_UNCHANGED)
smDDNS = SM_DONE;
else if(lastStatus == DDNS_STATUS_911 || lastStatus == DDNS_STATUS_DNSERR)
smDDNS = SM_SYSTEM_ERROR;
else
smDDNS = SM_SOFT_ERROR;
smDDNS++;
break;
case SM_DONE:
dwUpdateAt = TickGet() + 10*60*TICK_SECOND; // 10 minutes
smDDNS = SM_IDLE;
break;
case SM_SOFT_ERROR:
dwUpdateAt = TickGet() + 30*TICK_SECOND; // 30 seconds
smDDNS = SM_IDLE;
break;
case SM_SYSTEM_ERROR:
dwUpdateAt = TickGet() + 30*60*TICK_SECOND; // 30 minutes
smDDNS = SM_IDLE;
break;
}
}
/*********************************************************************
* Function: void TelnetTask(void)
*
* PreCondition: Stack is initialized()
*
* Input: None
*
* Output: None
*
* Side Effects: None
*
* Overview: None
*
* Note: None
********************************************************************/
void TelnetTask(void)
{
BYTE i;
BYTE vTelnetSession;
WORD w, w2;
TCP_SOCKET MySocket;
enum
{
SM_HOME = 0,
SM_PRINT_LOGIN,
SM_GET_LOGIN,
SM_GET_PASSWORD,
SM_GET_PASSWORD_BAD_LOGIN,
SM_AUTHENTICATED,
SM_REFRESH_VALUES
} TelnetState;
static TCP_SOCKET hTelnetSockets[MAX_TELNET_CONNECTIONS];
static BYTE vTelnetStates[MAX_TELNET_CONNECTIONS];
static BOOL bInitialized = FALSE;
// Perform one time initialization on power up
if(!bInitialized)
{
for(vTelnetSession = 0; vTelnetSession < MAX_TELNET_CONNECTIONS; vTelnetSession++)
{
hTelnetSockets[vTelnetSession] = INVALID_SOCKET;
vTelnetStates[vTelnetSession] = SM_HOME;
}
bInitialized = TRUE;
}
// Loop through each telnet session and process state changes and TX/RX data
for(vTelnetSession = 0; vTelnetSession < MAX_TELNET_CONNECTIONS; vTelnetSession++)
{
// Load up static state information for this session
MySocket = hTelnetSockets[vTelnetSession];
TelnetState = vTelnetStates[vTelnetSession];
// Reset our state if the remote client disconnected from us
if(MySocket != INVALID_SOCKET)
{
if(TCPWasReset(MySocket))
TelnetState = SM_PRINT_LOGIN;
}
// Handle session state
switch(TelnetState)
{
case SM_HOME:
// Connect a socket to the remote TCP server
MySocket = TCPOpen(0, TCP_OPEN_SERVER, TELNET_PORT, TCP_PURPOSE_TELNET);
// Abort operation if no TCP socket of type TCP_PURPOSE_TELNET is available
// If this ever happens, you need to go add one to TCPIPConfig.h
if(MySocket == INVALID_SOCKET)
break;
TelnetState++;
break;
case SM_PRINT_LOGIN:
// Make certain the socket can be written to
if(TCPIsPutReady(MySocket) < strlenpgm((ROM char*)strTitle))
break;
// Place the application protocol data into the transmit buffer.
TCPPutROMString(MySocket, strTitle);
// Send the packet
TCPFlush(MySocket);
TelnetState++;
case SM_GET_LOGIN:
// Make sure we can put the password prompt
if(TCPIsPutReady(MySocket) < strlenpgm((ROM char*)strPassword))
break;
// See if the user pressed return
w = TCPFind(MySocket, '\n', 0, FALSE);
if(w == 0xFFFFu)
{
if(TCPGetRxFIFOFree(MySocket) == 0u)
{
TCPPutROMString(MySocket, (ROM BYTE*)"\r\nToo much data.\r\n");
TCPDisconnect(MySocket);
}
break;
}
// Search for the username -- case insensitive
w2 = TCPFindROMArray(MySocket, (ROM BYTE*)TELNET_USERNAME, sizeof(TELNET_USERNAME)-1, 0, TRUE);
if((w2 != 0u) || !((sizeof(TELNET_USERNAME)-1 == w) || (sizeof(TELNET_USERNAME) == w)))
{
// Did not find the username, but let's pretend we did so we don't leak the user name validity
TelnetState = SM_GET_PASSWORD_BAD_LOGIN;
}
else
{
TelnetState = SM_GET_PASSWORD;
}
// Username verified, throw this line of data away
TCPGetArray(MySocket, NULL, w + 1);
// Print the password prompt
TCPPutROMString(MySocket, strPassword);
TCPFlush(MySocket);
break;
case SM_GET_PASSWORD:
case SM_GET_PASSWORD_BAD_LOGIN:
// Make sure we can put the authenticated prompt
if(TCPIsPutReady(MySocket) < strlenpgm((ROM char*)strAuthenticated))
break;
// See if the user pressed return
w = TCPFind(MySocket, '\n', 0, FALSE);
if(w == 0xFFFFu)
{
if(TCPGetRxFIFOFree(MySocket) == 0u)
{
TCPPutROMString(MySocket, (ROM BYTE*)"Too much data.\r\n");
TCPDisconnect(MySocket);
}
break;
}
// Search for the password -- case sensitive
w2 = TCPFindROMArray(MySocket, (ROM BYTE*)TELNET_PASSWORD, sizeof(TELNET_PASSWORD)-1, 0, FALSE);
if((w2 != 3u) || !((sizeof(TELNET_PASSWORD)-1 == w-3) || (sizeof(TELNET_PASSWORD) == w-3)) || (TelnetState == SM_GET_PASSWORD_BAD_LOGIN))
{
// Did not find the password
TelnetState = SM_PRINT_LOGIN;
TCPPutROMString(MySocket, strAccessDenied);
TCPDisconnect(MySocket);
break;
}
// Password verified, throw this line of data away
TCPGetArray(MySocket, NULL, w + 1);
// Print the authenticated prompt
TCPPutROMString(MySocket, strAuthenticated);
TelnetState = SM_AUTHENTICATED;
// No break
case SM_AUTHENTICATED:
if(TCPIsPutReady(MySocket) < strlenpgm((ROM char*)strDisplay) + 4)
break;
TCPPutROMString(MySocket, strDisplay);
TelnetState++;
// All future characters will be bold
TCPPutROMString(MySocket, (ROM BYTE*)"\x1b[1m");
case SM_REFRESH_VALUES:
if(TCPIsPutReady(MySocket) >= 78u)
{
//[10;1]
//"SNTP Time: (disabled)\r\n"
//"Analog: 1023\r\n"
//"Buttons: 3 2 1 0\r\n"
//"LEDs: 7 6 5 4 3 2 1 0\r\n"
// Write current UTC seconds from SNTP module, if it is enable
// and has changed. Note that conversion from a DWORD to an
// ASCII string can take a lot of CPU power, so we only print
// this if the value has changed.
#if defined(STACK_USE_SNTP_CLIENT)
{
static DWORD dwTime;
BYTE vTime[11];
if(dwTime != SNTPGetUTCSeconds())
{
// Position cursor at Line 10, Col 15
TCPPutROMString(MySocket, (ROM BYTE*)"\x1b[10;15f");
dwTime = SNTPGetUTCSeconds();
ultoa(dwTime, vTime);
TCPPutROMArray(MySocket, (ROM BYTE*)strSpaces, 10-strlen((char*)vTime));
TCPPutString(MySocket, vTime);
}
}
#endif
// Position cursor at Line 11, Col 21
TCPPutROMString(MySocket, (ROM BYTE*)"\x1b[11;21f");
// Put analog value with space padding on right side for 4 characters
TCPPutROMArray(MySocket, (ROM BYTE*)strSpaces, 4-strlen((char*)AN0String));
TCPPutString(MySocket, AN0String);
// Put Buttons
TCPPutROMString(MySocket, (ROM BYTE*)"\x1b[12;18f");
TCPPut(MySocket, BUTTON3_IO ? '1':'0');
TCPPut(MySocket, ' ');
TCPPut(MySocket, BUTTON2_IO ? '1':'0');
TCPPut(MySocket, ' ');
TCPPut(MySocket, BUTTON1_IO ? '1':'0');
TCPPut(MySocket, ' ');
TCPPut(MySocket, BUTTON0_IO ? '1':'0');
// Put LEDs
TCPPutROMString(MySocket, (ROM BYTE*)"\x1b[13;10f");
TCPPut(MySocket, LED1_IO ? '1':'0');
TCPPut(MySocket, ' ');
TCPPut(MySocket, LED0_IO ? '1':'0');
// Put cursor at beginning of next line
TCPPutROMString(MySocket, (ROM BYTE*)"\x1b[14;1f");
// Send the data out immediately
TCPFlush(MySocket);
}
if(TCPIsGetReady(MySocket))
{
TCPGet(MySocket, &i);
switch(i)
{
case '\r':
case 'q':
case 'Q':
if(TCPIsPutReady(MySocket) >= strlenpgm((ROM char*)strGoodBye))
TCPPutROMString(MySocket, strGoodBye);
TCPDisconnect(MySocket);
TelnetState = SM_PRINT_LOGIN;
break;
}
}
break;
}
// Save session state back into the static array
hTelnetSockets[vTelnetSession] = MySocket;
vTelnetStates[vTelnetSession] = TelnetState;
}
}
/*********************************************************************
* Function: void TelnetTask(void)
*
* PreCondition: Stack is initialized()
*
* Input: None
*
* Output: None
*
* Side Effects: None
*
* Overview: None
*
* Note: None
********************************************************************/
void TelnetTask(void)
{
BYTE i;
WORD w, w2;
static TCP_SOCKET MySocket = INVALID_SOCKET;
static enum _TelnetState
{
SM_HOME = 0,
SM_PRINT_LOGIN,
SM_GET_LOGIN,
SM_GET_PASSWORD,
SM_GET_PASSWORD_BAD_LOGIN,
SM_AUTHENTICATED,
SM_REFRESH_VALUES,
} TelnetState = SM_HOME;
// Reset our state if the remote client disconnected from us
if(MySocket != INVALID_SOCKET)
{
if(TCPWasReset(MySocket))
TelnetState = SM_PRINT_LOGIN;
}
switch(TelnetState)
{
case SM_HOME:
// Connect a socket to the remote TCP server
MySocket = TCPOpen(0, TCP_OPEN_SERVER, TELNET_PORT, TCP_PURPOSE_TELNET);
// Abort operation if no TCP socket of type TCP_PURPOSE_TELNET is available
// If this ever happens, you need to go add one to TCPIPConfig.h
if(MySocket == INVALID_SOCKET)
break;
TelnetState++;
break;
case SM_PRINT_LOGIN:
// Make certain the socket can be written to
if(TCPIsPutReady(MySocket) < strlenpgm((ROM char*)strTitle))
break;
// Place the application protocol data into the transmit buffer.
TCPPutROMString(MySocket, strTitle);
// Send the packet
TCPFlush(MySocket);
TelnetState++;
case SM_GET_LOGIN:
// Make sure we can put the password prompt
if(TCPIsPutReady(MySocket) < strlenpgm((ROM char*)strPassword))
break;
// See if the user pressed return
w = TCPFind(MySocket, '\n', 0, FALSE);
if(w == 0xFFFFu)
{
if(TCPGetRxFIFOFree(MySocket) == 0u)
{
TCPPutROMString(MySocket, (ROM BYTE*)"\r\nToo much data.\r\n");
TCPDisconnect(MySocket);
}
break;
}
// Search for the username -- case insensitive
w2 = TCPFindROMArray(MySocket, (ROM BYTE*)USERNAME, sizeof(USERNAME)-1, 0, TRUE);
if((w2 != 0) || !((sizeof(USERNAME)-1 == w) || (sizeof(USERNAME) == w)))
{
// Did not find the username, but let's pretend we did so we don't leak the user name validity
TelnetState = SM_GET_PASSWORD_BAD_LOGIN;
}
else
{
TelnetState = SM_GET_PASSWORD;
}
// Username verified, throw this line of data away
TCPGetArray(MySocket, NULL, w + 1);
// Print the password prompt
TCPPutROMString(MySocket, strPassword);
TCPFlush(MySocket);
break;
case SM_GET_PASSWORD:
case SM_GET_PASSWORD_BAD_LOGIN:
// Make sure we can put the authenticated prompt
if(TCPIsPutReady(MySocket) < strlenpgm((ROM char*)strAuthenticated))
break;
// See if the user pressed return
w = TCPFind(MySocket, '\n', 0, FALSE);
if(w == 0xFFFFu)
{
if(TCPGetRxFIFOFree(MySocket) == 0u)
{
TCPPutROMString(MySocket, (ROM BYTE*)"Too much data.\r\n");
TCPDisconnect(MySocket);
}
break;
}
// Search for the password -- case sensitive
w2 = TCPFindROMArray(MySocket, (ROM BYTE*)PASSWORD, sizeof(PASSWORD)-1, 0, FALSE);
if((w2 != 3) || !((sizeof(PASSWORD)-1 == w-3) || (sizeof(PASSWORD) == w-3)) || (TelnetState == SM_GET_PASSWORD_BAD_LOGIN))
{
// Did not find the password
TelnetState = SM_PRINT_LOGIN;
TCPPutROMString(MySocket, strAccessDenied);
TCPDisconnect(MySocket);
break;
}
// Password verified, throw this line of data away
TCPGetArray(MySocket, NULL, w + 1);
// Print the authenticated prompt
TCPPutROMString(MySocket, strAuthenticated);
TelnetState = SM_AUTHENTICATED;
// No break
case SM_AUTHENTICATED:
if(TCPIsPutReady(MySocket) < strlenpgm((ROM char*)strDisplay) + 4)
break;
TCPPutROMString(MySocket, strDisplay);
TelnetState++;
// All future characters will be bold
TCPPutROMString(MySocket, (ROM BYTE*)"\x1b[1m");
case SM_REFRESH_VALUES:
if(TCPIsPutReady(MySocket) >= 60u)
{
//[10;1]
//"Analog: 1023\r\n"
//"Buttons: 3 2 1 0\r\n"
//"LEDs: 7 6 5 4 3 2 1 0\r\n"
// Position cursor at Line 10, Col 21
TCPPutROMString(MySocket, (ROM BYTE*)"\x1b[10;21f");
// Put analog value with space padding on right side for 4 characters
TCPPutROMArray(MySocket, (ROM BYTE*)" ", 4-strlen((char*)AN0String));
TCPPutString(MySocket, AN0String);
// Put Buttons
TCPPutROMString(MySocket, (ROM BYTE*)"\x1b[11;18f");
TCPPut(MySocket, BUTTON3_IO ? '1':'0');
TCPPut(MySocket, ' ');
TCPPut(MySocket, BUTTON2_IO ? '1':'0');
TCPPut(MySocket, ' ');
TCPPut(MySocket, BUTTON1_IO ? '1':'0');
TCPPut(MySocket, ' ');
TCPPut(MySocket, BUTTON0_IO ? '1':'0');
// Put LEDs
TCPPutROMString(MySocket, (ROM BYTE*)"\x1b[12;10f");
TCPPut(MySocket, LED7_IO ? '1':'0');
TCPPut(MySocket, ' ');
TCPPut(MySocket, LED6_IO ? '1':'0');
TCPPut(MySocket, ' ');
TCPPut(MySocket, LED5_IO ? '1':'0');
TCPPut(MySocket, ' ');
TCPPut(MySocket, LED4_IO ? '1':'0');
TCPPut(MySocket, ' ');
TCPPut(MySocket, LED3_IO ? '1':'0');
TCPPut(MySocket, ' ');
TCPPut(MySocket, LED2_IO ? '1':'0');
TCPPut(MySocket, ' ');
TCPPut(MySocket, LED1_IO ? '1':'0');
TCPPut(MySocket, ' ');
TCPPut(MySocket, LED0_IO ? '1':'0');
// Put cursor at beginning of next line
TCPPutROMString(MySocket, (ROM BYTE*)"\x1b[13;1f");
// Send the data out immediately
TCPFlush(MySocket);
}
if(TCPIsGetReady(MySocket))
{
TCPGet(MySocket, &i);
switch(i)
{
case '\r':
case 'q':
case 'Q':
if(TCPIsPutReady(MySocket) >= strlenpgm((ROM char*)strGoodBye))
TCPPutROMString(MySocket, strGoodBye);
TCPDisconnect(MySocket);
TelnetState = SM_PRINT_LOGIN;
break;
}
}
break;
}
}
static HTTP_IO_RESULT HTTPMPFSUpload(void)
{
BYTE c[16];
WORD lenA, lenB;
switch(curHTTP.httpStatus)
{
// New upload, so look for the CRLFCRLF
case HTTP_MPFS_UP:
lenA = TCPFindROMArray(sktHTTP, (ROM BYTE*)"\r\n\r\n", 4, 0, FALSE);
if(lenA != 0xffff)
{// Found it, so remove all data up to and including
lenA = TCPGetArray(sktHTTP, NULL, lenA);
curHTTP.byteCount -= lenA;
// Make sure first 6 bytes are also in
if(TCPIsGetReady(sktHTTP) < (4 + 6) )
{
lenA++;
return HTTP_IO_NEED_DATA;
}
// Make sure it's an MPFS of the correct version
lenA = TCPGetArray(sktHTTP, c, 10);
curHTTP.byteCount -= lenA;
if(memcmppgm2ram(c, (ROM void*)"\r\n\r\nMPFS\x02\x00", 10) == 0)
{// Read as Ver 2.0
curHTTP.httpStatus = HTTP_MPFS_OK;
// Format MPFS storage and put 6 byte tag
curHTTP.file = MPFSFormat();
MPFSPutArray(curHTTP.file, &c[4], 6);
}
else
{// Version is wrong
curHTTP.httpStatus = HTTP_MPFS_ERROR;
}
}
else
{// Otherwise, remove as much as possible
lenA = TCPGetArray(sktHTTP, NULL, TCPIsGetReady(sktHTTP) - 4);
curHTTP.byteCount -= lenA;
}
break;
// Received file is invalid
case HTTP_MPFS_ERROR:
curHTTP.byteCount -= TCPIsGetReady(sktHTTP);
TCPDiscard(sktHTTP);
if(curHTTP.byteCount < 100 || curHTTP.byteCount > 0x80000000)
{// If almost all data was read, or if we overflowed, then return
smHTTP = SM_HTTP_SERVE_HEADERS;
return HTTP_IO_DONE;
}
break;
// File is verified, so write the data
case HTTP_MPFS_OK:
// Determine how much to read
lenA = TCPIsGetReady(sktHTTP);
if(lenA > curHTTP.byteCount)
lenA = curHTTP.byteCount;
while(lenA > 0)
{
lenB = TCPGetArray(sktHTTP, c, mMIN(lenA,16));
curHTTP.byteCount -= lenB;
lenA -= lenB;
MPFSPutArray(curHTTP.file, c, lenB);
}
// If we've read all the data
if(curHTTP.byteCount == 0)
{
MPFSPutEnd();
smHTTP = SM_HTTP_SERVE_HEADERS;
return HTTP_IO_DONE;
}
}
// Ask for more data
return HTTP_IO_NEED_DATA;
}
