#include "rping.h"

void
proc_v4(char *ptr, struct timeval *tvrecv)
{
	double rtt;
	struct libnet_ip_hdr *ip;
	struct libnet_icmp_hdr *icmp;
	struct timeval *tvsend;
	u_short len;
	int ihl;
	
	ip = (struct libnet_ip_hdr *)(ptr+link_offset);

	len = ntohs(ip->ip_len);
	ihl = (u_int)ip->ip_hl<<2;
	icmp = (struct libnet_icmp_hdr *)(ptr+link_offset+ihl);

	if (icmp->icmp_type == ICMP_ECHOREPLY) {
		
		tvsend = (struct timeval *)icmp->icmp_data;
		tv_sub(tvrecv,tvsend);
		rtt = tvrecv->tv_sec * 1000.0 + tvrecv->tv_usec / 1000.0;

		printf("%d bytes from %s: seq=%u, ttl=%u rtt=%.3f ms\n",
				len - ihl, libnet_host_lookup(dst_ip, 0),
				ntohs(icmp->icmp_seq), ip->ip_ttl, rtt);
	}
}