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/*
* Copyright (c) 1989 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Mike Muuss.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include "ping.h"
#ifndef HZ
#define HZ sysconf(_SC_CLK_TCK)
#endif
int options;
int mark;
int sndbuf;
int ttl;
int rtt;
int rtt_addend;
__u16 acked;
unsigned char outpack[MAXPACKET];
struct rcvd_table rcvd_tbl;
/* counters */
long npackets; /* max packets to transmit */
long nreceived; /* # of packets we got back */
long nrepeats; /* number of duplicates */
long ntransmitted; /* sequence # for outbound packets = #sent */
long nchecksum; /* replies with bad checksum */
long nerrors; /* icmp errors */
int interval = 1000; /* interval between packets (msec) */
int preload = 1;
int deadline = 0; /* time to die */
int lingertime = MAXWAIT*1000;
struct timeval start_time, cur_time;
volatile int exiting;
volatile int status_snapshot;
int confirm = 0;
volatile int in_pr_addr = 0; /* pr_addr() is executing */
jmp_buf pr_addr_jmp;
/* Stupid workarounds for bugs/missing functionality in older linuces.
* confirm_flag fixes refusing service of kernels without MSG_CONFIRM.
* i.e. for linux-2.2 */
int confirm_flag = MSG_CONFIRM;
/* timing */
int timing; /* flag to do timing */
long tmin = LONG_MAX; /* minimum round trip time */
long tmax; /* maximum round trip time */
/* Message for rpm maintainers: have _shame_. If you want
* to fix something send the patch to me for sanity checking.
* "sparcfix" patch is a complete non-sense, apparenly the person
* prepared it was stoned.
*/
long long tsum; /* sum of all times, for doing average */
long long tsum2;
int pipesize = -1;
int datalen = DEFDATALEN;
char *hostname;
int uid;
uid_t euid;
int ident; /* process id to identify our packets */
static int screen_width = INT_MAX;
#define ARRAY_SIZE(a) (sizeof(a) / sizeof(a[0]))
#ifdef CAPABILITIES
static cap_value_t cap_raw = CAP_NET_RAW;
static cap_value_t cap_admin = CAP_NET_ADMIN;
#endif
void limit_capabilities(void)
{
#ifdef CAPABILITIES
cap_t cap_cur_p;
cap_t cap_p;
cap_flag_value_t cap_ok;
cap_cur_p = cap_get_proc();
if (!cap_cur_p) {
perror("ping: cap_get_proc");
exit(-1);
}
cap_p = cap_init();
if (!cap_p) {
perror("ping: cap_init");
exit(-1);
}
cap_ok = CAP_CLEAR;
cap_get_flag(cap_cur_p, CAP_NET_ADMIN, CAP_PERMITTED, &cap_ok);
if (cap_ok != CAP_CLEAR)
cap_set_flag(cap_p, CAP_PERMITTED, 1, &cap_admin, CAP_SET);
cap_ok = CAP_CLEAR;
cap_get_flag(cap_cur_p, CAP_NET_RAW, CAP_PERMITTED, &cap_ok);
if (cap_ok != CAP_CLEAR)
cap_set_flag(cap_p, CAP_PERMITTED, 1, &cap_raw, CAP_SET);
if (cap_set_proc(cap_p) < 0) {
perror("ping: cap_set_proc");
exit(-1);
}
if (prctl(PR_SET_KEEPCAPS, 1) < 0) {
perror("ping: prctl");
exit(-1);
}
if (setuid(getuid()) < 0) {
perror("setuid");
exit(-1);
}
if (prctl(PR_SET_KEEPCAPS, 0) < 0) {
perror("ping: prctl");
exit(-1);
}
cap_free(cap_p);
cap_free(cap_cur_p);
#endif
uid = getuid();
euid = geteuid();
#ifndef CAPABILITIES
if (seteuid(uid)) {
perror("ping: setuid");
exit(-1);
}
#endif
}
#ifdef CAPABILITIES
int modify_capability(cap_value_t cap, cap_flag_value_t on)
{
cap_t cap_p = cap_get_proc();
cap_flag_value_t cap_ok;
int rc = -1;
if (!cap_p) {
perror("ping: cap_get_proc");
goto out;
}
cap_ok = CAP_CLEAR;
cap_get_flag(cap_p, cap, CAP_PERMITTED, &cap_ok);
if (cap_ok == CAP_CLEAR) {
rc = on ? -1 : 0;
goto out;
}
cap_set_flag(cap_p, CAP_EFFECTIVE, 1, &cap, on);
if (cap_set_proc(cap_p) < 0) {
perror("ping: cap_set_proc");
goto out;
}
cap_free(cap_p);
cap_p = NULL;
rc = 0;
out:
if (cap_p)
cap_free(cap_p);
return rc;
}
#else
int modify_capability(int on)
{
if (seteuid(on ? euid : getuid())) {
perror("seteuid");
return -1;
}
return 0;
}
#endif
void drop_capabilities(void)
{
#ifdef CAPABILITIES
cap_t cap = cap_init();
if (cap_set_proc(cap) < 0) {
perror("ping: cap_set_proc");
exit(-1);
}
cap_free(cap);
#else
if (setuid(getuid())) {
perror("ping: setuid");
exit(-1);
}
#endif
}
/* Fills all the outpack, excluding ICMP header, but _including_
* timestamp area with supplied pattern.
*/
void fill(char *patp, void *packet, unsigned packet_size)
{
int ii, jj, kk;
int pat[16];
char *cp;
unsigned char *bp = packet+8;
#ifdef USE_IDN
setlocale(LC_ALL, "C");
#endif
for (cp = patp; *cp; cp++) {
if (!isxdigit(*cp)) {
fprintf(stderr,
"ping: patterns must be specified as hex digits.\n");
exit(2);
}
}
ii = sscanf(patp,
"%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x",
&pat[0], &pat[1], &pat[2], &pat[3], &pat[4], &pat[5], &pat[6],
&pat[7], &pat[8], &pat[9], &pat[10], &pat[11], &pat[12],
&pat[13], &pat[14], &pat[15]);
if (ii > 0) {
for (kk = 0; kk <= packet_size - (8 + ii); kk += ii)
for (jj = 0; jj < ii; ++jj)
bp[jj + kk] = pat[jj];
}
if (!(options & F_QUIET)) {
printf("PATTERN: 0x");
for (jj = 0; jj < ii; ++jj)
printf("%02x", bp[jj] & 0xFF);
printf("\n");
}
#ifdef USE_IDN
setlocale(LC_ALL, "");
#endif
}
static void sigexit(int signo)
{
exiting = 1;
if (in_pr_addr)
longjmp(pr_addr_jmp, 0);
}
static void sigstatus(int signo)
{
status_snapshot = 1;
}
int __schedule_exit(int next)
{
static unsigned long waittime;
struct itimerval it;
if (waittime)
return next;
if (nreceived) {
waittime = 2 * tmax;
if (waittime < 1000*interval)
waittime = 1000*interval;
} else
waittime = lingertime*1000;
if (next < 0 || next < waittime/1000)
next = waittime/1000;
it.it_interval.tv_sec = 0;
it.it_interval.tv_usec = 0;
it.it_value.tv_sec = waittime/1000000;
it.it_value.tv_usec = waittime%1000000;
setitimer(ITIMER_REAL, &it, NULL);
return next;
}
static inline void update_interval(void)
{
int est = rtt ? rtt/8 : interval*1000;
interval = (est+rtt_addend+500)/1000;
if (uid && interval < MINUSERINTERVAL)
interval = MINUSERINTERVAL;
}
/*
* Print timestamp
*/
void print_timestamp(void)
{
if (options & F_PTIMEOFDAY) {
struct timeval tv;
gettimeofday(&tv, NULL);
printf("[%lu.%06lu] ",
(unsigned long)tv.tv_sec, (unsigned long)tv.tv_usec);
}
}
/*
* pinger --
* Compose and transmit an ICMP ECHO REQUEST packet. The IP packet
* will be added on by the kernel. The ID field is our UNIX process ID,
* and the sequence number is an ascending integer. The first several bytes
* of the data portion are used to hold a UNIX "timeval" struct in VAX
* byte-order, to compute the round-trip time.
*/
int pinger(ping_func_set_st *fset, socket_st *sock)
{
static int oom_count;
static int tokens;
int i;
/* Have we already sent enough? If we have, return an arbitrary positive value. */
if (exiting || (npackets && ntransmitted >= npackets && !deadline))
return 1000;
/* Check that packets < rate*time + preload */
if (cur_time.tv_sec == 0) {
gettimeofday(&cur_time, NULL);
tokens = interval*(preload-1);
} else {
long ntokens;
struct timeval tv;
gettimeofday(&tv, NULL);
ntokens = (tv.tv_sec - cur_time.tv_sec)*1000 +
(tv.tv_usec-cur_time.tv_usec)/1000;
if (!interval) {
/* Case of unlimited flood is special;
* if we see no reply, they are limited to 100pps */
if (ntokens < MININTERVAL && in_flight() >= preload)
return MININTERVAL-ntokens;
}
ntokens += tokens;
if (ntokens > interval*preload)
ntokens = interval*preload;
if (ntokens < interval)
return interval - ntokens;
cur_time = tv;
tokens = ntokens - interval;
}
if (options & F_OUTSTANDING) {
if (ntransmitted > 0 && !rcvd_test(ntransmitted)) {
print_timestamp();
printf("no answer yet for icmp_seq=%lu\n", (ntransmitted % MAX_DUP_CHK));
fflush(stdout);
}
}
resend:
i = fset->send_probe(sock, outpack, sizeof(outpack));
if (i == 0) {
oom_count = 0;
advance_ntransmitted();
if (!(options & F_QUIET) && (options & F_FLOOD)) {
/* Very silly, but without this output with
* high preload or pipe size is very confusing. */
if ((preload < screen_width && pipesize < screen_width) ||
in_flight() < screen_width)
write_stdout(".", 1);
}
return interval - tokens;
}
/* And handle various errors... */
if (i > 0) {
/* Apparently, it is some fatal bug. */
abort();
} else if (errno == ENOBUFS || errno == ENOMEM) {
int nores_interval;
/* Device queue overflow or OOM. Packet is not sent. */
tokens = 0;
/* Slowdown. This works only in adaptive mode (option -A) */
rtt_addend += (rtt < 8*50000 ? rtt/8 : 50000);
if (options&F_ADAPTIVE)
update_interval();
nores_interval = SCHINT(interval/2);
if (nores_interval > 500)
nores_interval = 500;
oom_count++;
if (oom_count*nores_interval < lingertime)
return nores_interval;
i = 0;
/* Fall to hard error. It is to avoid complete deadlock
* on stuck output device even when dealine was not requested.
* Expected timings are screwed up in any case, but we will
* exit some day. :-) */
} else if (errno == EAGAIN) {
/* Socket buffer is full. */
tokens += interval;
return MININTERVAL;
} else {
if ((i=fset->receive_error_msg(sock)) > 0) {
/* An ICMP error arrived. In this case, we've received
* an error from sendto(), but we've also received an
* ICMP message, which means the packet did in fact
* send in some capacity. So, in this odd case, report
* the more specific errno as the error, and treat this
* as a hard local error. */
i = 0;
goto hard_local_error;
}
/* Compatibility with old linuces. */
if (i == 0 && confirm_flag && errno == EINVAL) {
confirm_flag = 0;
errno = 0;
}
if (!errno)
goto resend;
}
hard_local_error:
/* Hard local error. Pretend we sent packet. */
advance_ntransmitted();
if (i == 0 && !(options & F_QUIET)) {
if (options & F_FLOOD)
write_stdout("E", 1);
else
perror("ping: sendmsg");
}
tokens = 0;
return SCHINT(interval);
}
/* Set socket buffers, "alloc" is an estimate of memory taken by single packet. */
void sock_setbufs(socket_st *sock, int alloc)
{
int rcvbuf, hold;
socklen_t tmplen = sizeof(hold);
if (!sndbuf)
sndbuf = alloc;
setsockopt(sock->fd, SOL_SOCKET, SO_SNDBUF, (char *)&sndbuf, sizeof(sndbuf));
rcvbuf = hold = alloc * preload;
if (hold < 65536)
hold = 65536;
setsockopt(sock->fd, SOL_SOCKET, SO_RCVBUF, (char *)&hold, sizeof(hold));
if (getsockopt(sock->fd, SOL_SOCKET, SO_RCVBUF, (char *)&hold, &tmplen) == 0) {
if (hold < rcvbuf)
fprintf(stderr, "WARNING: probably, rcvbuf is not enough to hold preload.\n");
}
}
/* Protocol independent setup and parameter checks. */
void setup(socket_st *sock)
{
int hold;
struct timeval tv;
sigset_t sset;
if ((options & F_FLOOD) && !(options & F_INTERVAL))
interval = 0;
if (uid && interval < MINUSERINTERVAL) {
fprintf(stderr, "ping: cannot flood; minimal interval allowed for user is %dms\n", MINUSERINTERVAL);
exit(2);
}
if (interval >= INT_MAX/preload) {
fprintf(stderr, "ping: illegal preload and/or interval\n");
exit(2);
}
hold = 1;
if (options & F_SO_DEBUG)
setsockopt(sock->fd, SOL_SOCKET, SO_DEBUG, (char *)&hold, sizeof(hold));
if (options & F_SO_DONTROUTE)
setsockopt(sock->fd, SOL_SOCKET, SO_DONTROUTE, (char *)&hold, sizeof(hold));
#ifdef SO_TIMESTAMP
if (!(options&F_LATENCY)) {
int on = 1;
if (setsockopt(sock->fd, SOL_SOCKET, SO_TIMESTAMP, &on, sizeof(on)))
fprintf(stderr, "Warning: no SO_TIMESTAMP support, falling back to SIOCGSTAMP\n");
}
#endif
#ifdef SO_MARK
if (options & F_MARK) {
int ret;
enable_capability_admin();
ret = setsockopt(sock->fd, SOL_SOCKET, SO_MARK, &mark, sizeof(mark));
disable_capability_admin();
if (ret == -1) {
/* we probably dont wanna exit since old kernels
* dont support mark ..
*/
fprintf(stderr, "Warning: Failed to set mark %d\n", mark);
}
}
#endif
/* Set some SNDTIMEO to prevent blocking forever
* on sends, when device is too slow or stalls. Just put limit
* of one second, or "interval", if it is less.
*/
tv.tv_sec = 1;
tv.tv_usec = 0;
if (interval < 1000) {
tv.tv_sec = 0;
tv.tv_usec = 1000 * SCHINT(interval);
}
setsockopt(sock->fd, SOL_SOCKET, SO_SNDTIMEO, (char*)&tv, sizeof(tv));
/* Set RCVTIMEO to "interval". Note, it is just an optimization
* allowing to avoid redundant poll(). */
tv.tv_sec = SCHINT(interval)/1000;
tv.tv_usec = 1000*(SCHINT(interval)%1000);
if (setsockopt(sock->fd, SOL_SOCKET, SO_RCVTIMEO, (char*)&tv, sizeof(tv)))
options |= F_FLOOD_POLL;
if (!(options & F_PINGFILLED)) {
int i;
unsigned char *p = outpack+8;
/* Do not forget about case of small datalen,
* fill timestamp area too!
*/
for (i = 0; i < datalen; ++i)
*p++ = i;
}
if (sock->socktype == SOCK_RAW)
ident = htons(getpid() & 0xFFFF);
set_signal(SIGINT, sigexit);
set_signal(SIGALRM, sigexit);
set_signal(SIGQUIT, sigstatus);
sigemptyset(&sset);
sigprocmask(SIG_SETMASK, &sset, NULL);
gettimeofday(&start_time, NULL);
if (deadline) {
struct itimerval it;
it.it_interval.tv_sec = 0;
it.it_interval.tv_usec = 0;
it.it_value.tv_sec = deadline;
it.it_value.tv_usec = 0;
setitimer(ITIMER_REAL, &it, NULL);
}
if (isatty(STDOUT_FILENO)) {
struct winsize w;
if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &w) != -1) {
if (w.ws_col > 0)
screen_width = w.ws_col;
}
}
}
/*
* Return 0 if pattern in payload point to be ptr did not match the pattern that was sent
*/
int contains_pattern_in_payload(__u8 *ptr)
{
int i;
__u8 *cp, *dp;
/* check the data */
cp = ((u_char*)ptr) + sizeof(struct timeval);
dp = &outpack[8 + sizeof(struct timeval)];
for (i = sizeof(struct timeval); i < datalen; ++i, ++cp, ++dp) {
if (*cp != *dp)
return 0;
}
return 1;
}
void main_loop(ping_func_set_st *fset, socket_st *sock, __u8 *packet, int packlen)
{
char addrbuf[128];
char ans_data[4096];
struct iovec iov;
struct msghdr msg;
struct cmsghdr *c;
int cc;
int next;
int polling;
int recv_error;
iov.iov_base = (char *)packet;
for (;;) {
/* Check exit conditions. */
if (exiting)
break;
if (npackets && nreceived + nerrors >= npackets)
break;
if (deadline && nerrors)
break;
/* Check for and do special actions. */
if (status_snapshot)
status();
/* Send probes scheduled to this time. */
do {
next = pinger(fset, sock);
next = schedule_exit(next);
} while (next <= 0);
/* "next" is time to send next probe, if positive.
* If next<=0 send now or as soon as possible. */
/* Technical part. Looks wicked. Could be dropped,
* if everyone used the newest kernel. :-)
* Its purpose is:
* 1. Provide intervals less than resolution of scheduler.
* Solution: spinning.
* 2. Avoid use of poll(), when recvmsg() can provide
* timed waiting (SO_RCVTIMEO). */
polling = 0;
recv_error = 0;
if ((options & (F_ADAPTIVE|F_FLOOD_POLL)) || next<SCHINT(interval)) {
int recv_expected = in_flight();
/* If we are here, recvmsg() is unable to wait for
* required timeout. */
if (1000 % HZ == 0 ? next <= 1000 / HZ : (next < INT_MAX / HZ && next * HZ <= 1000)) {
/* Very short timeout... So, if we wait for
* something, we sleep for MININTERVAL.
* Otherwise, spin! */
if (recv_expected) {
next = MININTERVAL;
} else {
next = 0;
/* When spinning, no reasons to poll.
* Use nonblocking recvmsg() instead. */
polling = MSG_DONTWAIT;
/* But yield yet. */
sched_yield();
}
}
if (!polling &&
((options & (F_ADAPTIVE|F_FLOOD_POLL)) || interval)) {
struct pollfd pset;
pset.fd = sock->fd;
pset.events = POLLIN;
pset.revents = 0;
if (poll(&pset, 1, next) < 1 ||
!(pset.revents&(POLLIN|POLLERR)))
continue;
polling = MSG_DONTWAIT;
recv_error = pset.revents&POLLERR;
}
}
for (;;) {
struct timeval *recv_timep = NULL;
struct timeval recv_time;
int not_ours = 0; /* Raw socket can receive messages
* destined to other running pings. */
iov.iov_len = packlen;
memset(&msg, 0, sizeof(msg));
msg.msg_name = addrbuf;
msg.msg_namelen = sizeof(addrbuf);
msg.msg_iov = &iov;
msg.msg_iovlen = 1;
msg.msg_control = ans_data;
msg.msg_controllen = sizeof(ans_data);
cc = recvmsg(sock->fd, &msg, polling);
polling = MSG_DONTWAIT;
if (cc < 0) {
/* If there was a POLLERR and there is no packet
* on the socket, try to read the error queue.
* Otherwise, give up.
*/
if ((errno == EAGAIN && !recv_error) ||
errno == EINTR)
break;
recv_error = 0;
if (!fset->receive_error_msg(sock)) {
if (errno) {
perror("ping: recvmsg");
break;
}
not_ours = 1;
}
} else {
#ifdef SO_TIMESTAMP
for (c = CMSG_FIRSTHDR(&msg); c; c = CMSG_NXTHDR(&msg, c)) {
if (c->cmsg_level != SOL_SOCKET ||
c->cmsg_type != SO_TIMESTAMP)
continue;
if (c->cmsg_len < CMSG_LEN(sizeof(struct timeval)))
continue;
recv_timep = (struct timeval*)CMSG_DATA(c);
}
#endif
if ((options&F_LATENCY) || recv_timep == NULL) {
if ((options&F_LATENCY) ||
ioctl(sock->fd, SIOCGSTAMP, &recv_time))
gettimeofday(&recv_time, NULL);
recv_timep = &recv_time;
}
not_ours = fset->parse_reply(sock, &msg, cc, addrbuf, recv_timep);
}
/* See? ... someone runs another ping on this host. */
if (not_ours && sock->socktype == SOCK_RAW)
fset->install_filter(sock);
/* If nothing is in flight, "break" returns us to pinger. */
if (in_flight() == 0)
break;
/* Otherwise, try to recvmsg() again. recvmsg()
* is nonblocking after the first iteration, so that
* if nothing is queued, it will receive EAGAIN
* and return to pinger. */
}
}
finish();
}
int gather_statistics(__u8 *icmph, int icmplen,
int cc, __u16 seq, int hops,
int csfailed, struct timeval *tv, char *from,
void (*pr_reply)(__u8 *icmph, int cc))
{
int dupflag = 0;
long triptime = 0;
__u8 *ptr = icmph + icmplen;
++nreceived;
if (!csfailed)
acknowledge(seq);
if (timing && cc >= 8+sizeof(struct timeval)) {
struct timeval tmp_tv;
memcpy(&tmp_tv, ptr, sizeof(tmp_tv));
restamp:
tvsub(tv, &tmp_tv);
triptime = tv->tv_sec * 1000000 + tv->tv_usec;
if (triptime < 0) {
fprintf(stderr, "Warning: time of day goes back (%ldus), taking countermeasures.\n", triptime);
triptime = 0;
if (!(options & F_LATENCY)) {
gettimeofday(tv, NULL);
options |= F_LATENCY;
goto restamp;
}
}
if (!csfailed) {
tsum += triptime;
tsum2 += (long long)triptime * (long long)triptime;
if (triptime < tmin)
tmin = triptime;
if (triptime > tmax)
tmax = triptime;
if (!rtt)
rtt = triptime*8;
else
rtt += triptime-rtt/8;
if (options&F_ADAPTIVE)
update_interval();
}
}
if (csfailed) {
++nchecksum;
--nreceived;
} else if (rcvd_test(seq)) {
++nrepeats;
--nreceived;
dupflag = 1;
} else {
rcvd_set(seq);
dupflag = 0;
}
confirm = confirm_flag;
if (options & F_QUIET)
return 1;
if (options & F_FLOOD) {
if (!csfailed)
write_stdout("\b \b", 3);
else
write_stdout("\bC", 2);
} else {
int i;
__u8 *cp, *dp;
print_timestamp();
printf("%d bytes from %s:", cc, from);
if (pr_reply)
pr_reply(icmph, cc);
if (hops >= 0)
printf(" ttl=%d", hops);
if (cc < datalen+8) {
printf(" (truncated)\n");
return 1;
}
if (timing) {
if (triptime >= 100000)
printf(" time=%ld ms", (triptime+500)/1000);
else if (triptime >= 10000)
printf(" time=%ld.%01ld ms", triptime/1000,
((triptime%1000)+50)/100);
else if (triptime >= 1000)
printf(" time=%ld.%02ld ms", triptime/1000,
((triptime%1000)+5)/10);
else
printf(" time=%ld.%03ld ms", triptime/1000,
triptime%1000);
}
if (dupflag)
printf(" (DUP!)");
if (csfailed)
printf(" (BAD CHECKSUM!)");
/* check the data */
cp = ((unsigned char*)ptr) + sizeof(struct timeval);
dp = &outpack[8 + sizeof(struct timeval)];
for (i = sizeof(struct timeval); i < datalen; ++i, ++cp, ++dp) {
if (*cp != *dp) {
printf("\nwrong data byte #%d should be 0x%x but was 0x%x",
i, *dp, *cp);
cp = (unsigned char*)ptr + sizeof(struct timeval);
for (i = sizeof(struct timeval); i < datalen; ++i, ++cp) {
if ((i % 32) == sizeof(struct timeval))
printf("\n#%d\t", i);
printf("%x ", *cp);
}
break;
}
}
}
return 0;
}
static long llsqrt(long long a)
{
long long prev = ~((long long)1 << 63);
long long x = a;
if (x > 0) {
while (x < prev) {
prev = x;
x = (x+(a/x))/2;
}
}
return (long)x;
}
/*
* finish --
* Print out statistics, and give up.
*/
void finish(void)
{
struct timeval tv = cur_time;
char *comma = "";
tvsub(&tv, &start_time);
putchar('\n');
fflush(stdout);
printf("--- %s ping statistics ---\n", hostname);
printf("%ld packets transmitted, ", ntransmitted);
printf("%ld received", nreceived);
if (nrepeats)
printf(", +%ld duplicates", nrepeats);
if (nchecksum)
printf(", +%ld corrupted", nchecksum);
if (nerrors)
printf(", +%ld errors", nerrors);
if (ntransmitted) {
#ifdef USE_IDN
setlocale(LC_ALL, "C");
#endif
printf(", %g%% packet loss",
(float) ((((long long)(ntransmitted - nreceived)) * 100.0) /
ntransmitted));
printf(", time %ldms", (1000*tv.tv_sec+tv.tv_usec+500)/1000);
}
putchar('\n');
if (nreceived && timing) {
long tmdev;
tsum /= nreceived + nrepeats;
tsum2 /= nreceived + nrepeats;
tmdev = llsqrt(tsum2 - tsum * tsum);
printf("rtt min/avg/max/mdev = %ld.%03ld/%lu.%03ld/%ld.%03ld/%ld.%03ld ms",
(long)tmin/1000, (long)tmin%1000,
(unsigned long)(tsum/1000), (long)(tsum%1000),
(long)tmax/1000, (long)tmax%1000,
(long)tmdev/1000, (long)tmdev%1000
);
comma = ", ";
}
if (pipesize > 1) {
printf("%spipe %d", comma, pipesize);
comma = ", ";
}
if (nreceived && (!interval || (options&(F_FLOOD|F_ADAPTIVE))) && ntransmitted > 1) {
int ipg = (1000000*(long long)tv.tv_sec+tv.tv_usec)/(ntransmitted-1);
printf("%sipg/ewma %d.%03d/%d.%03d ms",
comma, ipg/1000, ipg%1000, rtt/8000, (rtt/8)%1000);
}
putchar('\n');
exit(!nreceived || (deadline && nreceived < npackets));
}
void status(void)
{
int loss = 0;
long tavg = 0;
status_snapshot = 0;
if (ntransmitted)
loss = (((long long)(ntransmitted - nreceived)) * 100) / ntransmitted;
fprintf(stderr, "\r%ld/%ld packets, %d%% loss", nreceived, ntransmitted, loss);
if (nreceived && timing) {
tavg = tsum / (nreceived + nrepeats);
fprintf(stderr, ", min/avg/ewma/max = %ld.%03ld/%lu.%03ld/%d.%03d/%ld.%03ld ms",
(long)tmin/1000, (long)tmin%1000,
tavg/1000, tavg%1000,
rtt/8000, (rtt/8)%1000,
(long)tmax/1000, (long)tmax%1000
);
}
fprintf(stderr, "\n");
}
inline int is_ours(socket_st *sock, uint16_t id) {
return sock->socktype == SOCK_DGRAM || id == ident;
}