network.h

embedded ethernet code for pic18F

/* labels for IP address match type */

#define NO_MATCH 0
#define UNICAST 1
#define BROADCAST 2
#define BROADCAST_SUBNET 3

/* labels for IP packet type */

#define ICMP 1
#define UDP 2
#define TCP 3
#define INVALID 0
#define NOT_CONTENT_TYPE -1

/* prototypes */

void initNetworkLayer(const rom unsigned char *,const rom unsigned char *,const rom unsigned char *);
signed int handleNetworkLayer(unsigned char *);

unsigned char getIPDatagramType(unsigned char *);
void getIPDatagramSourceAddr(unsigned char *,unsigned char *,unsigned char *);
unsigned char matchIPDatagramAddress(unsigned char *);
unsigned long computeIPChecksum(unsigned char *,unsigned long,unsigned int);
unsigned char matchIP(unsigned char *,unsigned char *);
unsigned long computeIPContributionToChecksum(unsigned char *);
void buildIPDatagramHeader(unsigned char *,unsigned char *,unsigned char *,unsigned char);
void setIPDatagramLength(unsigned char *,unsigned int);
unsigned int getIPDatagramPayloadLength(unsigned char *);
unsigned int getIPDatagramLength(unsigned char *);