ipv4.h

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#ifndef __IPV4_H__
#define __IPV4_H__
 
#ifdef ARCH_X64
#pragma pack(push,1)
#endif
__declspec(align(2))
typedef struct _ipv4head_ {
    unsigned char versionHeaderLen;
    unsigned char typeOfService;
    unsigned short totalLength;
    unsigned short identification;
    unsigned short flagsFragOffset;
    unsigned char timeToLive;
    unsigned char protocol;
    unsigned short headerChecksum;
    unsigned srcAddress;
    unsigned destAddress;
    uint8_t payload[];
}IPv4Header;
#ifdef ARCH_X64
#pragma pack(pop)
#endif
 
#define IPV4_PROTOCOL_UDP 17
#define IPV4_PROTOCOL_TCP 6
 
 
 
extern uint16_t IPv4CalculateChecksum(IPv4Header* p);
 
extern void ip_ntoa(const uint32_t src);
/*
* CreateIPv4Socket -- create a new ipv4 socket
* @param type -- type of the socket its Datagram or
* stream socket
* @param protocol -- protocol number
*/
extern int CreateIPv4Socket(int type, int protocol);
 
/*
 * IPv4HandlePacket -- IPv4 Handle Packet 
 * @param data -- Pointer to IPv4 packet
 * @param nic -- Pointer to Network Card
 */
extern void IPv4HandlePacket(void* data,AuVFSNode* nic);
 
/*
 * IPV4SendPacket -- sends a packet to next stage
 * @param packet -- IPv4 packet to send
 * @param nic -- Pointer to NIC device
 */
extern void IPV4SendPacket(IPv4Header* packet, AuVFSNode* nic);
#endif