#ifndef icmpH
#define icmpH


struct ICMP_header {
  unsigned char ICMP_type;
  unsigned char ICMP_code;
  unsigned int ICMP_checksumByte;
};


// ICMP opcodes
#define ICMP_ECHO 8
#define ICMP_REPLY 0


// FUNCTION
extern void icmp (unsigned int len, unsigned char *buff);

#endif