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