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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

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

#ifndef __TCPIP_H__

#define __TCPIP_H__

#define PACKET_SIZE           600

#define FRAME_COUNT           100

#define FRAME_COUNT_SYNC      50

#define FRAME_COUNT_SEND      10

#define FRAME_COUNT_RCV       5

#define RETRANSMIT_TIME       110

#define SOCKET_TIMEOUT        15

#define SEND_WINDOW           7000

#define RECEIVE_WINDOW        5120

typedef enum IPMode_e {

   IP_MODE_UDP,

   IP_MODE_TCP,

   IP_MODE_PING

} IPMode_e;

typedef enum IPState_e {

   IP_LISTEN,

   IP_PING,

   IP_UDP,

   IP_SYN,

   IP_TCP,

   IP_FIN_CLIENT,

   IP_FIN_SERVER,

   IP_CLOSED

} IPState_e;

typedef struct IPSocket IPSocket;

typedef void (*IPSendFuncPtr)(uint8 *packet, int length);

typedef void (*IPSockFuncPtr)(IPSocket *sock);

typedef void (*IPCallbackPtr)(IPSocket *sock, uint8 *buf, int bytes);

typedef struct IPFrame {

   uint8 packet[PACKET_SIZE];

   struct IPFrame *next, *prev;

   struct IPSocket *socket;

   uint32 seqEnd;

   uint16 length;

   short  timeout;

   uint8 state, retryCnt;

   uint8 pad1, pad2;

} IPFrame;

struct IPSocket {

   struct IPSocket *next, *prev;

   IPState_e state;

   uint32 seq;

   uint32 seqReceived;

   uint32 seqWindow;

   uint32 ack;

   uint32 ackProcessed;

   uint32 timeout;

   uint32 timeoutReset;

   int resentDone;

   int dontFlush;

   uint8 headerSend[38];

   uint8 headerRcv[38];

   struct IPFrame *frameReadHead;

   struct IPFrame *frameReadTail;

   int readOffset;

   struct IPFrame *frameSend;

   int sendOffset;

   void *fileOut;

   void *fileIn;

   IPSockFuncPtr funcPtr;

   IPCallbackPtr userFunc;

   void *userPtr;

   void *userPtr2;

   uint32 userData;

   uint32 userData2;

};

//ethernet.c

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

void EthernetInit(unsigned char MacAddress[6]);

int EthernetReceive(unsigned char *buffer, int length);

void EthernetTransmit(unsigned char *buffer, int length);

//tcpip.c

void IPInit(IPSendFuncPtr frameSendFunction, uint8 macAddress[6], char name[6]);

IPFrame *IPFrameGet(int freeCount);

int IPProcessEthernetPacket(IPFrame *frameIn, int length);

void IPTick(void);

IPSocket *IPOpen(IPMode_e mode, uint32 ipAddress, uint32 port, IPSockFuncPtr 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);

#ifdef IPPRINTF

void IPPrintf(IPSocket *socket, char *message, int arg0, int arg1, int arg2, int arg3);

#else

void IPPrintf(IPSocket *socket, char *message, ...);

#endif

void IPResolve(char *name, IPCallbackPtr resolvedFunc, void *arg);

uint32 IPAddressSelf(void);

//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);

//html.c

void HtmlInit(int UseFiles);

//netutil.c

void FtpdInit(int UseFiles);

IPSocket *FtpTransfer(uint32 ip, char *user, char *passwd,

                      char *filename, uint8 *buf, int size,

                      int send, IPCallbackPtr callback);

void TftpdInit(void);

IPSocket *TftpTransfer(uint32 ip, char *filename, uint8 *buffer, int size,

                       IPCallbackPtr callback);

void ConsoleInit(void);

void *IPNameValue(const char *name, void *value);

#endif //__TCPIP_H__