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/*--------------------------------------------------------------------

 * TITLE: Plasma TCP/IP Protocol Stack

 * AUTHOR: Steve Rhoads (rhoadss@yahoo.com)

 * DATE CREATED: 4/22/06

 * FILENAME: tcpip.h

 * PROJECT: Plasma CPU core

 * COPYRIGHT: Software placed into the public domain by the author.

 *    Software 'as is' without warranty.  Author liable for nothing.

 * DESCRIPTION:

 *    Plasma TCP/IP Protocol Stack

 *--------------------------------------------------------------------*/

#define PACKET_SIZE           600

#define FRAME_COUNT           100

#define FRAME_COUNT_SEND      5

#define FRAME_COUNT_RCV       10

#define FRAME_COUNT_WINDOW    15

#define RETRANSMIT_TIME       3

#define SOCKET_TIMEOUT        20

typedef enum IPMode_e {

   IP_MODE_UDP,

   IP_MODE_TCP

} IPMode_e;

typedef enum IPState_e {

   IP_LISTEN,

   IP_UDP,

   IP_SYN,

   IP_TCP,

   IP_FIN_CLIENT,

   IP_FIN_SERVER,

   IP_CLOSED

} IPState_e;

typedef void (*IPFuncPtr)();

typedef struct IPFrame {

   uint8 packet[PACKET_SIZE];

   struct IPFrame *next, *prev;

   struct IPSocket *socket;

   uint32 seqEnd;

   uint16 length, timeout;

   uint8 state, retryCnt;

} IPFrame;

typedef struct IPSocket {

   struct IPSocket *next, *prev;

   IPState_e state;

   uint32 seq;

   uint32 seqReceived;

   uint32 seqWindow;

   uint32 ack;

   uint32 timeout;

   uint8 headerSend[38];

   uint8 headerRcv[38];

   struct IPFrame *frameReadHead;

   struct IPFrame *frameReadTail;

   int readOffset;

   struct IPFrame *frameSend;

   int sendOffset;

   IPFuncPtr funcPtr;

   IPFuncPtr userFunc;

   void *userPtr;

   uint32 userData;

} IPSocket;

//ethernet.c

void EthernetSendPacket(const unsigned char *packet, int length);

//tcpip.c

void IPInit(IPFuncPtr FrameSendFunction);

IPFrame *IPFrameGet(int freeCount);

int IPProcessEthernetPacket(IPFrame *frameIn);

void IPTick(void);

IPSocket *IPOpen(IPMode_e Mode, uint32 IPAddress, uint32 Port, IPFuncPtr funcPtr);

void IPWriteFlush(IPSocket *Socket);

uint32 IPWrite(IPSocket *Socket, const uint8 *Buf, uint32 Length);

uint32 IPRead(IPSocket *Socket, uint8 *Buf, uint32 Length);

void IPClose(IPSocket *Socket);

uint32 IPResolve(char *Name, IPFuncPtr resolvedFunc);

//http.c

#define HTML_LENGTH_CALLBACK  -2

#define HTML_LENGTH_LIST_END  -1

typedef struct PageEntry_s {

   const char *name;

   int length;

   const char *page;

} PageEntry_t;

void HttpInit(const PageEntry_t *Pages, int UseFiles);