/*
LUFA Library
- Copyright (C) Dean Camera, 2011.
+ Copyright (C) Dean Camera, 2012.
dean [at] fourwalledcubicle [dot] com
www.lufa-lib.org
*/
/*
- Copyright 2011 Dean Camera (dean [at] fourwalledcubicle [dot] com)
+ Copyright 2012 Dean Camera (dean [at] fourwalledcubicle [dot] com)
Permission to use, copy, modify, distribute, and sell this
software and its documentation for any purpose is hereby granted
ConnectionStateTable[CSTableEntry].Info.SequenceNumberOut += PacketSize;
- TCPHeaderOUT->Checksum = TCP_Checksum16(TCPHeaderOUT, ServerIPAddress,
- ConnectionStateTable[CSTableEntry].RemoteAddress,
+ TCPHeaderOUT->Checksum = TCP_Checksum16(TCPHeaderOUT, &ServerIPAddress,
+ &ConnectionStateTable[CSTableEntry].RemoteAddress,
(sizeof(TCP_Header_t) + PacketSize));
PacketSize += sizeof(TCP_Header_t);
}
}
-/** Initialises the TCP protocol handler, clearing the port and connection state tables. This must be called before TCP packets are
+/** Initializes the TCP protocol handler, clearing the port and connection state tables. This must be called before TCP packets are
* processed.
*/
void TCP_Init(void)
/** Sets the state and callback handler of the given port, specified in big endian to the given state.
*
* \param[in] Port Port whose state and callback function to set, specified in big endian
- * \param[in] State New state of the port, a value from the TCP_PortStates_t enum
+ * \param[in] State New state of the port, a value from the \ref TCP_PortStates_t enum
* \param[in] Handler Application callback handler for the port
*
* \return Boolean true if the port state was set, false otherwise (no more space in the port state table)
/* Note, Port number should be specified in BIG endian to simplify network code */
/* Check to see if the port entry is already in the port state table */
- for (uint8_t PTableEntry = 0; PTableEntry < MAX_TCP_CONNECTIONS; PTableEntry++)
+ for (uint8_t PTableEntry = 0; PTableEntry < MAX_OPEN_TCP_PORTS; PTableEntry++)
{
/* Find existing entry for the port in the table, update it if found */
if (PortStateTable[PTableEntry].Port == Port)
/* Check if trying to open the port -- if so we need to find an unused (closed) entry and replace it */
if (State == TCP_Port_Open)
{
- for (uint8_t PTableEntry = 0; PTableEntry < MAX_TCP_CONNECTIONS; PTableEntry++)
+ for (uint8_t PTableEntry = 0; PTableEntry < MAX_OPEN_TCP_PORTS; PTableEntry++)
{
/* Find a closed port entry in the table, change it to the given port and state */
if (PortStateTable[PTableEntry].State == TCP_Port_Closed)
*
* \param[in] Port TCP port whose state is to be retrieved, given in big-endian
*
- * \return A value from the TCP_PortStates_t enum
+ * \return A value from the \ref TCP_PortStates_t enum
*/
uint8_t TCP_GetPortState(const uint16_t Port)
{
/* Note, Port number should be specified in BIG endian to simplify network code */
- for (uint8_t PTableEntry = 0; PTableEntry < MAX_TCP_CONNECTIONS; PTableEntry++)
+ for (uint8_t PTableEntry = 0; PTableEntry < MAX_OPEN_TCP_PORTS; PTableEntry++)
{
/* Find existing entry for the port in the table, return the port status if found */
if (PortStateTable[PTableEntry].Port == Port)
* \param[in] Port TCP port of the connection on the device, specified in big endian
* \param[in] RemoteAddress Remote protocol IP address of the connected device
* \param[in] RemotePort TCP port of the remote device in the connection, specified in big endian
- * \param[in] State TCP connection state, a value from the TCP_ConnectionStates_t enum
+ * \param[in] State TCP connection state, a value from the \ref TCP_ConnectionStates_t enum
*
* \return Boolean true if the connection was updated or created, false otherwise (no more space in the connection state table)
*/
bool TCP_SetConnectionState(const uint16_t Port,
- const IP_Address_t RemoteAddress,
+ const IP_Address_t* RemoteAddress,
const uint16_t RemotePort,
const uint8_t State)
{
{
/* Find port entry in the table */
if ((ConnectionStateTable[CSTableEntry].Port == Port) &&
- IP_COMPARE(&ConnectionStateTable[CSTableEntry].RemoteAddress, &RemoteAddress) &&
+ IP_COMPARE(&ConnectionStateTable[CSTableEntry].RemoteAddress, RemoteAddress) &&
ConnectionStateTable[CSTableEntry].RemotePort == RemotePort)
{
ConnectionStateTable[CSTableEntry].State = State;
if (ConnectionStateTable[CSTableEntry].State == TCP_Connection_Closed)
{
ConnectionStateTable[CSTableEntry].Port = Port;
- ConnectionStateTable[CSTableEntry].RemoteAddress = RemoteAddress;
+ ConnectionStateTable[CSTableEntry].RemoteAddress = *RemoteAddress;
ConnectionStateTable[CSTableEntry].RemotePort = RemotePort;
ConnectionStateTable[CSTableEntry].State = State;
return true;
* \param[in] RemoteAddress Remote protocol IP address of the connected host
* \param[in] RemotePort Remote TCP port of the connected host, specified in big endian
*
- * \return A value from the TCP_ConnectionStates_t enum
+ * \return A value from the \ref TCP_ConnectionStates_t enum
*/
uint8_t TCP_GetConnectionState(const uint16_t Port,
- const IP_Address_t RemoteAddress,
+ const IP_Address_t* RemoteAddress,
const uint16_t RemotePort)
{
/* Note, Port number should be specified in BIG endian to simplify network code */
{
/* Find port entry in the table */
if ((ConnectionStateTable[CSTableEntry].Port == Port) &&
- IP_COMPARE(&ConnectionStateTable[CSTableEntry].RemoteAddress, &RemoteAddress) &&
+ IP_COMPARE(&ConnectionStateTable[CSTableEntry].RemoteAddress, RemoteAddress) &&
ConnectionStateTable[CSTableEntry].RemotePort == RemotePort)
{
* \return ConnectionInfo structure of the connection if found, NULL otherwise
*/
TCP_ConnectionInfo_t* TCP_GetConnectionInfo(const uint16_t Port,
- const IP_Address_t RemoteAddress,
+ const IP_Address_t* RemoteAddress,
const uint16_t RemotePort)
{
/* Note, Port number should be specified in BIG endian to simplify network code */
{
/* Find port entry in the table */
if ((ConnectionStateTable[CSTableEntry].Port == Port) &&
- IP_COMPARE(&ConnectionStateTable[CSTableEntry].RemoteAddress, &RemoteAddress) &&
+ IP_COMPARE(&ConnectionStateTable[CSTableEntry].RemoteAddress, RemoteAddress) &&
ConnectionStateTable[CSTableEntry].RemotePort == RemotePort)
{
return &ConnectionStateTable[CSTableEntry].Info;
{
/* Detect SYN from host to start a connection */
if (TCPHeaderIN->Flags & TCP_FLAG_SYN)
- TCP_SetConnectionState(TCPHeaderIN->DestinationPort, IPHeaderIN->SourceAddress, TCPHeaderIN->SourcePort, TCP_Connection_Listen);
+ TCP_SetConnectionState(TCPHeaderIN->DestinationPort, &IPHeaderIN->SourceAddress, TCPHeaderIN->SourcePort, TCP_Connection_Listen);
/* Detect RST from host to abort existing connection */
if (TCPHeaderIN->Flags & TCP_FLAG_RST)
{
- if (TCP_SetConnectionState(TCPHeaderIN->DestinationPort, IPHeaderIN->SourceAddress,
+ if (TCP_SetConnectionState(TCPHeaderIN->DestinationPort, &IPHeaderIN->SourceAddress,
TCPHeaderIN->SourcePort, TCP_Connection_Closed))
{
TCPHeaderOUT->Flags = (TCP_FLAG_RST | TCP_FLAG_ACK);
else
{
/* Process the incoming TCP packet based on the current connection state for the sender and port */
- switch (TCP_GetConnectionState(TCPHeaderIN->DestinationPort, IPHeaderIN->SourceAddress, TCPHeaderIN->SourcePort))
+ switch (TCP_GetConnectionState(TCPHeaderIN->DestinationPort, &IPHeaderIN->SourceAddress, TCPHeaderIN->SourcePort))
{
case TCP_Connection_Listen:
if (TCPHeaderIN->Flags == TCP_FLAG_SYN)
{
/* SYN connection starts a connection with a peer */
- if (TCP_SetConnectionState(TCPHeaderIN->DestinationPort, IPHeaderIN->SourceAddress,
+ if (TCP_SetConnectionState(TCPHeaderIN->DestinationPort, &IPHeaderIN->SourceAddress,
TCPHeaderIN->SourcePort, TCP_Connection_SYNReceived))
{
TCPHeaderOUT->Flags = (TCP_FLAG_SYN | TCP_FLAG_ACK);
- ConnectionInfo = TCP_GetConnectionInfo(TCPHeaderIN->DestinationPort, IPHeaderIN->SourceAddress, TCPHeaderIN->SourcePort);
+ ConnectionInfo = TCP_GetConnectionInfo(TCPHeaderIN->DestinationPort, &IPHeaderIN->SourceAddress, TCPHeaderIN->SourcePort);
ConnectionInfo->SequenceNumberIn = (SwapEndian_32(TCPHeaderIN->SequenceNumber) + 1);
ConnectionInfo->SequenceNumberOut = 0;
{
/* ACK during the connection process completes the connection to a peer */
- TCP_SetConnectionState(TCPHeaderIN->DestinationPort, IPHeaderIN->SourceAddress,
+ TCP_SetConnectionState(TCPHeaderIN->DestinationPort, &IPHeaderIN->SourceAddress,
TCPHeaderIN->SourcePort, TCP_Connection_Established);
- ConnectionInfo = TCP_GetConnectionInfo(TCPHeaderIN->DestinationPort, IPHeaderIN->SourceAddress,
+ ConnectionInfo = TCP_GetConnectionInfo(TCPHeaderIN->DestinationPort, &IPHeaderIN->SourceAddress,
TCPHeaderIN->SourcePort);
ConnectionInfo->SequenceNumberOut++;
TCPHeaderOUT->Flags = (TCP_FLAG_FIN | TCP_FLAG_ACK);
PacketResponse = true;
- TCP_SetConnectionState(TCPHeaderIN->DestinationPort, IPHeaderIN->SourceAddress,
+ TCP_SetConnectionState(TCPHeaderIN->DestinationPort, &IPHeaderIN->SourceAddress,
TCPHeaderIN->SourcePort, TCP_Connection_CloseWait);
- ConnectionInfo = TCP_GetConnectionInfo(TCPHeaderIN->DestinationPort, IPHeaderIN->SourceAddress,
+ ConnectionInfo = TCP_GetConnectionInfo(TCPHeaderIN->DestinationPort, &IPHeaderIN->SourceAddress,
TCPHeaderIN->SourcePort);
ConnectionInfo->SequenceNumberIn++;
}
else if ((TCPHeaderIN->Flags == TCP_FLAG_ACK) || (TCPHeaderIN->Flags == (TCP_FLAG_ACK | TCP_FLAG_PSH)))
{
- ConnectionInfo = TCP_GetConnectionInfo(TCPHeaderIN->DestinationPort, IPHeaderIN->SourceAddress,
+ ConnectionInfo = TCP_GetConnectionInfo(TCPHeaderIN->DestinationPort, &IPHeaderIN->SourceAddress,
TCPHeaderIN->SourcePort);
/* Check if the buffer is currently in use either by a buffered data to send, or receive */
break;
case TCP_Connection_Closing:
- ConnectionInfo = TCP_GetConnectionInfo(TCPHeaderIN->DestinationPort, IPHeaderIN->SourceAddress,
+ ConnectionInfo = TCP_GetConnectionInfo(TCPHeaderIN->DestinationPort, &IPHeaderIN->SourceAddress,
TCPHeaderIN->SourcePort);
TCPHeaderOUT->Flags = (TCP_FLAG_ACK | TCP_FLAG_FIN);
ConnectionInfo->Buffer.InUse = false;
- TCP_SetConnectionState(TCPHeaderIN->DestinationPort, IPHeaderIN->SourceAddress,
+ TCP_SetConnectionState(TCPHeaderIN->DestinationPort, &IPHeaderIN->SourceAddress,
TCPHeaderIN->SourcePort, TCP_Connection_FINWait1);
break;
case TCP_Connection_FINWait1:
if (TCPHeaderIN->Flags == (TCP_FLAG_FIN | TCP_FLAG_ACK))
{
- ConnectionInfo = TCP_GetConnectionInfo(TCPHeaderIN->DestinationPort, IPHeaderIN->SourceAddress,
+ ConnectionInfo = TCP_GetConnectionInfo(TCPHeaderIN->DestinationPort, &IPHeaderIN->SourceAddress,
TCPHeaderIN->SourcePort);
TCPHeaderOUT->Flags = TCP_FLAG_ACK;
ConnectionInfo->SequenceNumberIn++;
ConnectionInfo->SequenceNumberOut++;
- TCP_SetConnectionState(TCPHeaderIN->DestinationPort, IPHeaderIN->SourceAddress,
+ TCP_SetConnectionState(TCPHeaderIN->DestinationPort, &IPHeaderIN->SourceAddress,
TCPHeaderIN->SourcePort, TCP_Connection_Closed);
}
else if (TCPHeaderIN->Flags == TCP_FLAG_ACK)
{
- TCP_SetConnectionState(TCPHeaderIN->DestinationPort, IPHeaderIN->SourceAddress,
+ TCP_SetConnectionState(TCPHeaderIN->DestinationPort, &IPHeaderIN->SourceAddress,
TCPHeaderIN->SourcePort, TCP_Connection_FINWait2);
}
case TCP_Connection_FINWait2:
if (TCPHeaderIN->Flags == (TCP_FLAG_FIN | TCP_FLAG_ACK))
{
- ConnectionInfo = TCP_GetConnectionInfo(TCPHeaderIN->DestinationPort, IPHeaderIN->SourceAddress,
+ ConnectionInfo = TCP_GetConnectionInfo(TCPHeaderIN->DestinationPort, &IPHeaderIN->SourceAddress,
TCPHeaderIN->SourcePort);
TCPHeaderOUT->Flags = TCP_FLAG_ACK;
ConnectionInfo->SequenceNumberIn++;
ConnectionInfo->SequenceNumberOut++;
- TCP_SetConnectionState(TCPHeaderIN->DestinationPort, IPHeaderIN->SourceAddress,
+ TCP_SetConnectionState(TCPHeaderIN->DestinationPort, &IPHeaderIN->SourceAddress,
TCPHeaderIN->SourcePort, TCP_Connection_Closed);
}
case TCP_Connection_CloseWait:
if (TCPHeaderIN->Flags == TCP_FLAG_ACK)
{
- TCP_SetConnectionState(TCPHeaderIN->DestinationPort, IPHeaderIN->SourceAddress,
+ TCP_SetConnectionState(TCPHeaderIN->DestinationPort, &IPHeaderIN->SourceAddress,
TCPHeaderIN->SourcePort, TCP_Connection_Closed);
}
/* Check if we need to respond to the sent packet */
if (PacketResponse)
{
- ConnectionInfo = TCP_GetConnectionInfo(TCPHeaderIN->DestinationPort, IPHeaderIN->SourceAddress,
+ ConnectionInfo = TCP_GetConnectionInfo(TCPHeaderIN->DestinationPort, &IPHeaderIN->SourceAddress,
TCPHeaderIN->SourcePort);
TCPHeaderOUT->SourcePort = TCPHeaderIN->DestinationPort;
TCPHeaderOUT->Checksum = 0;
TCPHeaderOUT->Reserved = 0;
- TCPHeaderOUT->Checksum = TCP_Checksum16(TCPHeaderOUT, IPHeaderIN->DestinationAddress,
- IPHeaderIN->SourceAddress, sizeof(TCP_Header_t));
+ TCPHeaderOUT->Checksum = TCP_Checksum16(TCPHeaderOUT, &IPHeaderIN->DestinationAddress,
+ &IPHeaderIN->SourceAddress, sizeof(TCP_Header_t));
return sizeof(TCP_Header_t);
}
* \return A 16-bit TCP checksum value
*/
static uint16_t TCP_Checksum16(void* TCPHeaderOutStart,
- const IP_Address_t SourceAddress,
- const IP_Address_t DestinationAddress,
- const uint16_t TCPOutSize)
+ const IP_Address_t* SourceAddress,
+ const IP_Address_t* DestinationAddress,
+ uint16_t TCPOutSize)
{
uint32_t Checksum = 0;
/* TCP/IP checksums are the addition of the one's compliment of each word including the IP pseudo-header,
complimented */
- Checksum += ((uint16_t*)&SourceAddress)[0];
- Checksum += ((uint16_t*)&SourceAddress)[1];
- Checksum += ((uint16_t*)&DestinationAddress)[0];
- Checksum += ((uint16_t*)&DestinationAddress)[1];
+ Checksum += ((uint16_t*)SourceAddress)[0];
+ Checksum += ((uint16_t*)SourceAddress)[1];
+ Checksum += ((uint16_t*)DestinationAddress)[0];
+ Checksum += ((uint16_t*)DestinationAddress)[1];
Checksum += SwapEndian_16(PROTOCOL_TCP);
Checksum += SwapEndian_16(TCPOutSize);
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