1 #include "ping.h"
2
3 void
proc_v4(char * ptr,ssize_t len,struct timeval * tvrecv)4 proc_v4(char *ptr, ssize_t len, struct timeval *tvrecv)
5 {
6 int hlen1, icmplen;
7 double rtt;
8 struct ip *ip;
9 struct icmp *icmp;
10 struct timeval *tvsend;
11
12 ip = (struct ip *) ptr; /* start of IP header */
13 hlen1 = ip->ip_hl << 2; /* length of IP header */
14
15 icmp = (struct icmp *) (ptr + hlen1); /* start of ICMP header */
16 if ( (icmplen = len - hlen1) < 8)
17 err_quit("icmplen (%d) < 8", icmplen);
18
19 if (icmp->icmp_type == ICMP_ECHOREPLY) {
20 if (icmp->icmp_id != pid)
21 return; /* not a response to our ECHO_REQUEST */
22 if (icmplen < 16)
23 err_quit("icmplen (%d) < 16", icmplen);
24
25 tvsend = (struct timeval *) icmp->icmp_data;
26 tv_sub(tvrecv, tvsend);
27 rtt = tvrecv->tv_sec * 1000.0 + tvrecv->tv_usec / 1000.0;
28
29 printf("%d bytes from %s: seq=%u, ttl=%d, rtt=%.3f ms\n",
30 icmplen, Sock_ntop_host(pr->sarecv, pr->salen),
31 icmp->icmp_seq, ip->ip_ttl, rtt);
32
33 } else if (verbose) {
34 printf(" %d bytes from %s: type = %d, code = %d\n",
35 icmplen, Sock_ntop_host(pr->sarecv, pr->salen),
36 icmp->icmp_type, icmp->icmp_code);
37 }
38 }
39