#include <libnet.h>
#include <pcap.h>

u_long src_ip, dst_ip;
int sock;
int nsent;
int num_to_send;
int verbose;
pid_t pid;
struct libnet_link_l *l;
pcap_t *pcapd;
int link_offset;
char errbuf[256];
char *device;

void readloop(void);
void sig_alrm(int);
void sig_int(int);
void send_icmp_echo(int, int, int, int, int);
void tv_sub(struct timeval *, struct timeval *);
void init_capture(void);
char *next_pcap(void);
void proc_v4(char *, struct timeval *);