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/*
* network_raw.h, depends on libnet.h
*/
#define ETH_SIZE 14
#define IP_SIZE 20
#define TCP_SIZE 20
#define ICMP_SIZE 8
#define UDP_SIZE 8
/*
* Checksum stuff
*/
#define CKSUM_CARRY(x) \
(x = (x >> 16) + (x & 0xffff), (~(x + (x >> 16)) & 0xffff))
#define int_ntoa(x) inet_ntoa(*((struct in_addr *)&(x)))
/*
* leet net tuple
*/
struct net_tuple
{
uint32_t src;
unsigned short int sport;
uint32_t dst;
unsigned short int dport;
};
/*
* pseudo TCP header for calculating the chksum
*/
struct _fakehead
{
uint32_t saddr;
uint32_t daddr;
uint8_t zero;
uint8_t protocol;
uint16_t tot_len;
};
int init_network_raw (void);
int in_cksum (unsigned short *, int);
int send_ipv4 (int, u_char *, size_t);
void add_udphdr (unsigned char *, struct net_tuple *, int);
void add_tcphdr (unsigned char *, struct net_tuple *, uint8_t, int,
tcp_seq *, tcp_seq *);
void add_icmpping (unsigned char *, int, int);
void add_iphdr (unsigned char *, uint8_t ip_p, struct net_tuple *, int);
int answer_tcp (int, struct ip *, struct tcphdr *, uint8_t, u_char *, uint);
int vrfy_ip (struct ip *, uint32_t, u_short *);
int vrfy_tcp (struct tcphdr *, uint32_t, u_short *);
int decode_nvt(u_char *, uint, u_char *, uint *, u_char *, uint *);
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