diff options
Diffstat (limited to 'networking/ping.c')
| -rw-r--r-- | networking/ping.c | 63 |
1 files changed, 29 insertions, 34 deletions
diff --git a/networking/ping.c b/networking/ping.c index e94b791..c4a498c 100644 --- a/networking/ping.c +++ b/networking/ping.c @@ -242,8 +242,8 @@ struct globals { int if_index; unsigned long ntransmitted, nreceived, nrepeats, pingcount; uint16_t myid; - unsigned tmin, tmax; - unsigned long tsum; + unsigned tmin, tmax; /* in us */ + unsigned long long tsum; /* in us, sum of all times */ const char *hostname; const char *dotted; union { @@ -301,11 +301,13 @@ static void pingstats(int junk ATTRIBUTE_UNUSED) if (ntransmitted) ntransmitted = (ntransmitted - nreceived) * 100 / ntransmitted; printf("%lu%% packet loss\n", ntransmitted); - if (tmin != UINT_MAX) - printf("round-trip min/avg/max = %u.%u/%lu.%lu/%u.%u ms\n", - tmin / 10, tmin % 10, - (tsum / (nreceived + nrepeats)) / 10, - (tsum / (nreceived + nrepeats)) % 10, tmax / 10, tmax % 10); + if (tmin != UINT_MAX) { + unsigned tavg = tsum / (nreceived + nrepeats); + printf("round-trip min/avg/max = %u.%03u/%u.%03u/%u.%03u ms\n", + tmin / 1000, tmin % 1000, + tavg / 1000, tavg % 1000, + tmax / 1000, tmax % 1000); + } exit(nreceived == 0); /* (nreceived == 0) is true (1) -- 'failure' */ } @@ -334,7 +336,9 @@ static void sendping_tail(void (*sp)(int), const void *pkt, int size_pkt) static void sendping4(int junk ATTRIBUTE_UNUSED) { - struct icmp *pkt = alloca(datalen + ICMP_MINLEN); + /* +4 reserves a place for timestamp, which may end up sitting + * *after* packet. Saves one if() */ + struct icmp *pkt = alloca(datalen + ICMP_MINLEN + 4); pkt->icmp_type = ICMP_ECHO; pkt->icmp_code = 0; @@ -342,10 +346,9 @@ static void sendping4(int junk ATTRIBUTE_UNUSED) pkt->icmp_seq = htons(ntransmitted); /* don't ++ here, it can be a macro */ pkt->icmp_id = myid; -// I can't fucking believe someone thought it's okay to do it like this... -// where's hton? Where is a provision for different word size, structure padding, etc?? -// FIXME! - gettimeofday((struct timeval *) &pkt->icmp_dun, NULL); + /* We don't do hton, because we will read it back on the same machine */ + /*if (datalen >= 4)*/ + *(uint32_t*)&pkt->icmp_dun = monotonic_us(); pkt->icmp_cksum = in_cksum((unsigned short *) pkt, datalen + ICMP_MINLEN); @@ -354,7 +357,7 @@ static void sendping4(int junk ATTRIBUTE_UNUSED) #if ENABLE_PING6 static void sendping6(int junk ATTRIBUTE_UNUSED) { - struct icmp6_hdr *pkt = alloca(datalen + sizeof(struct icmp6_hdr)); + struct icmp6_hdr *pkt = alloca(datalen + sizeof(struct icmp6_hdr) + 4); pkt->icmp6_type = ICMP6_ECHO_REQUEST; pkt->icmp6_code = 0; @@ -362,8 +365,8 @@ static void sendping6(int junk ATTRIBUTE_UNUSED) pkt->icmp6_seq = htons(ntransmitted); /* don't ++ here, it can be a macro */ pkt->icmp6_id = myid; -// FIXME! - gettimeofday((struct timeval *) &pkt->icmp6_data8[4], NULL); + /*if (datalen >= 4)*/ + *(uint32_t*)(&pkt->icmp6_data8[4]) = monotonic_us(); sendping_tail(sendping6, pkt, datalen + sizeof(struct icmp6_hdr)); } @@ -417,7 +420,7 @@ static const char *icmp6_type_name(int id) } #endif -static void unpack_tail(int sz, struct timeval *tp, +static void unpack_tail(int sz, uint32_t *tp, const char *from_str, uint16_t recv_seq, int ttl) { @@ -427,17 +430,9 @@ static void unpack_tail(int sz, struct timeval *tp, ++nreceived; if (tp) { - struct timeval tv; - - gettimeofday(&tv, NULL); - tv.tv_usec -= tp->tv_usec; - if (tv.tv_usec < 0) { - --tv.tv_sec; - tv.tv_usec += 1000000; - } - tv.tv_sec -= tp->tv_sec; - - triptime = tv.tv_sec * 10000 + (tv.tv_usec / 100); + /* (int32_t) cast is for hypothetical 64-bit unsigned */ + /* (doesn't hurt 32-bit real-world anyway) */ + triptime = (int32_t) ((uint32_t)monotonic_us() - *tp); tsum += triptime; if (triptime < tmin) tmin = triptime; @@ -459,7 +454,7 @@ static void unpack_tail(int sz, struct timeval *tp, printf("%d bytes from %s: seq=%u ttl=%d", sz, from_str, recv_seq, ttl); if (tp) - printf(" time=%u.%u ms", triptime / 10, triptime % 10); + printf(" time=%u.%03u ms", triptime / 1000, triptime % 1000); puts(dupmsg); fflush(stdout); } @@ -483,10 +478,10 @@ static void unpack4(char *buf, int sz, struct sockaddr_in *from) if (icmppkt->icmp_type == ICMP_ECHOREPLY) { uint16_t recv_seq = ntohs(icmppkt->icmp_seq); - struct timeval *tp = NULL; + uint32_t *tp = NULL; - if (sz >= ICMP_MINLEN + sizeof(struct timeval)) - tp = (struct timeval *) icmppkt->icmp_data; + if (sz >= ICMP_MINLEN + sizeof(uint32_t)) + tp = (uint32_t *) icmppkt->icmp_data; unpack_tail(sz, tp, inet_ntoa(*(struct in_addr *) &from->sin_addr.s_addr), recv_seq, iphdr->ttl); @@ -512,10 +507,10 @@ static void unpack6(char *packet, int sz, struct sockaddr_in6 *from, int hoplimi if (icmppkt->icmp6_type == ICMP6_ECHO_REPLY) { uint16_t recv_seq = ntohs(icmppkt->icmp6_seq); - struct timeval *tp = NULL; + uint32_t *tp = NULL; - if (sz >= sizeof(struct icmp6_hdr) + sizeof(struct timeval)) - tp = (struct timeval *) &icmppkt->icmp6_data8[4]; + if (sz >= sizeof(struct icmp6_hdr) + sizeof(uint32_t)) + tp = (uint32_t *) &icmppkt->icmp6_data8[4]; unpack_tail(sz, tp, inet_ntop(AF_INET6, &pingaddr.sin6.sin6_addr, buf, sizeof(buf)), |