1 /* vi: set sw=4 ts=4: */
3 * Mini ping implementation for busybox
5 * Copyright (C) 1999 by Randolph Chung <tausq@debian.org>
7 * Adapted from the ping in netkit-base 0.10:
8 * Copyright (c) 1989 The Regents of the University of California.
11 * This code is derived from software contributed to Berkeley by
14 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
17 * Copyright (C) 1999 by Randolph Chung <tausq@debian.org>
19 * This version of ping is adapted from the ping in netkit-base 0.10,
22 * Original copyright notice is retained at the end of this file.
24 * This version is an adaptation of ping.c from busybox.
25 * The code was modified by Bart Visscher <magick@linux-fan.com>
29 #include <netinet/ip_icmp.h>
32 #include <netinet/icmp6.h>
33 /* I see RENUMBERED constants in bits/in.h - !!?
34 * What a fuck is going on with libc? Is it a glibc joke? */
35 #ifdef IPV6_2292HOPLIMIT
37 #define IPV6_HOPLIMIT IPV6_2292HOPLIMIT
46 MAX_DUP_CHK = (8 * 128),
48 PINGINTERVAL = 1, /* 1 second */
53 static int in_cksum(unsigned short *buf, int sz)
57 unsigned short *w = buf;
58 unsigned short ans = 0;
66 *(unsigned char *) (&ans) = *(unsigned char *) w;
70 sum = (sum >> 16) + (sum & 0xFFFF);
76 #if !ENABLE_FEATURE_FANCY_PING
80 static char *hostname;
82 static void noresp(int ign ATTRIBUTE_UNUSED)
84 printf("No response from %s\n", hostname);
88 static void ping(len_and_sockaddr *lsa)
90 struct sockaddr_in pingaddr;
93 char packet[DEFDATALEN + MAXIPLEN + MAXICMPLEN];
95 pingsock = create_icmp_socket();
98 pkt = (struct icmp *) packet;
99 memset(pkt, 0, sizeof(packet));
100 pkt->icmp_type = ICMP_ECHO;
101 pkt->icmp_cksum = in_cksum((unsigned short *) pkt, sizeof(packet));
103 c = sendto(pingsock, packet, DEFDATALEN + ICMP_MINLEN, 0,
104 (struct sockaddr *) &pingaddr, sizeof(pingaddr));
107 if (ENABLE_FEATURE_CLEAN_UP)
109 bb_perror_msg_and_die("sendto");
112 /* listen for replies */
114 struct sockaddr_in from;
115 socklen_t fromlen = sizeof(from);
117 c = recvfrom(pingsock, packet, sizeof(packet), 0,
118 (struct sockaddr *) &from, &fromlen);
121 bb_perror_msg("recvfrom");
124 if (c >= 76) { /* ip + icmp */
125 struct iphdr *iphdr = (struct iphdr *) packet;
127 pkt = (struct icmp *) (packet + (iphdr->ihl << 2)); /* skip ip hdr */
128 if (pkt->icmp_type == ICMP_ECHOREPLY)
132 if (ENABLE_FEATURE_CLEAN_UP)
137 static void ping6(len_and_sockaddr *lsa)
139 struct sockaddr_in6 pingaddr;
140 struct icmp6_hdr *pkt;
143 char packet[DEFDATALEN + MAXIPLEN + MAXICMPLEN];
145 pingsock = create_icmp6_socket();
146 pingaddr = lsa->sin6;
148 pkt = (struct icmp6_hdr *) packet;
149 memset(pkt, 0, sizeof(packet));
150 pkt->icmp6_type = ICMP6_ECHO_REQUEST;
152 sockopt = offsetof(struct icmp6_hdr, icmp6_cksum);
153 setsockopt(pingsock, SOL_RAW, IPV6_CHECKSUM, &sockopt, sizeof(sockopt));
155 c = sendto(pingsock, packet, DEFDATALEN + sizeof (struct icmp6_hdr), 0,
156 (struct sockaddr *) &pingaddr, sizeof(pingaddr));
159 if (ENABLE_FEATURE_CLEAN_UP)
161 bb_perror_msg_and_die("sendto");
164 /* listen for replies */
166 struct sockaddr_in6 from;
167 socklen_t fromlen = sizeof(from);
169 c = recvfrom(pingsock, packet, sizeof(packet), 0,
170 (struct sockaddr *) &from, &fromlen);
173 bb_perror_msg("recvfrom");
176 if (c >= 8) { /* icmp6_hdr */
177 pkt = (struct icmp6_hdr *) packet;
178 if (pkt->icmp6_type == ICMP6_ECHO_REPLY)
182 if (ENABLE_FEATURE_CLEAN_UP)
187 int ping_main(int argc, char **argv)
189 len_and_sockaddr *lsa;
191 sa_family_t af = AF_UNSPEC;
192 while (++argv[0][0]) == '-') {
193 if (argv[0][1] == '4') {
197 if (argv[0][1] == '6') {
212 lsa = host_and_af2sockaddr(hostname, 0, af);
214 lsa = host_and_af2sockaddr(hostname, 0, AF_INET);
216 /* Set timer _after_ DNS resolution */
217 signal(SIGALRM, noresp);
218 alarm(5); /* give the host 5000ms to respond */
221 if (lsa->sa.sa_family == AF_INET6)
226 printf("%s is alive!\n", hostname);
231 #else /* FEATURE_FANCY_PING */
234 /* full(er) version */
236 #define OPT_STRING ("qvc:s:I:4" USE_PING6("6"))
239 OPT_VERBOSE = 1 << 1,
244 OPT_IPV6 = (1 << 6) * ENABLE_PING6,
250 struct sockaddr_in sin;
252 struct sockaddr_in sin6;
255 static struct sockaddr_in sourceaddr;
256 static int pingsock = -1;
257 static unsigned datalen; /* intentionally uninitialized to work around gcc bug */
261 static unsigned long ntransmitted, nreceived, nrepeats, pingcount;
263 static unsigned long tmin = ULONG_MAX, tmax, tsum;
264 static char rcvd_tbl[MAX_DUP_CHK / 8];
266 static const char *hostname;
267 static const char *dotted;
269 #define A(bit) rcvd_tbl[(bit)>>3] /* identify byte in array */
270 #define B(bit) (1 << ((bit) & 0x07)) /* identify bit in byte */
271 #define SET(bit) (A(bit) |= B(bit))
272 #define CLR(bit) (A(bit) &= (~B(bit)))
273 #define TST(bit) (A(bit) & B(bit))
275 /**************************************************************************/
277 static void pingstats(void)
281 signal(SIGINT, SIG_IGN);
283 printf("\n--- %s ping statistics ---\n", hostname);
284 printf("%lu packets transmitted, ", ntransmitted);
285 printf("%lu packets received, ", nreceived);
287 printf("%lu duplicates, ", nrepeats);
289 ntransmitted = (ntransmitted - nreceived) * 100 / ntransmitted);
290 printf("%lu%% packet loss\n", ntransmitted);
292 printf("round-trip min/avg/max = %lu.%lu/%lu.%lu/%lu.%lu ms\n",
293 tmin / 10, tmin % 10,
294 (tsum / (nreceived + nrepeats)) / 10,
295 (tsum / (nreceived + nrepeats)) % 10, tmax / 10, tmax % 10);
297 status = EXIT_SUCCESS;
299 status = EXIT_FAILURE;
303 static void sendping(int junk ATTRIBUTE_UNUSED)
307 char packet[datalen + ICMP_MINLEN];
309 pkt = (struct icmp *) packet;
311 pkt->icmp_type = ICMP_ECHO;
314 pkt->icmp_seq = htons(ntransmitted); /* don't ++ here, it can be a macro */
316 CLR((uint16_t)ntransmitted % MAX_DUP_CHK);
319 gettimeofday((struct timeval *) &pkt->icmp_dun, NULL);
320 pkt->icmp_cksum = in_cksum((unsigned short *) pkt, sizeof(packet));
322 i = sendto(pingsock, packet, sizeof(packet), 0,
323 &pingaddr.sa, sizeof(pingaddr.sin));
326 bb_perror_msg_and_die("sendto");
327 if ((size_t)i != sizeof(packet))
328 bb_error_msg_and_die("ping wrote %d chars; %d expected", i,
329 (int)sizeof(packet));
331 signal(SIGALRM, sendping);
332 if (pingcount == 0 || ntransmitted < pingcount) { /* schedule next in 1s */
334 } else { /* done, wait for the last ping to come back */
335 /* todo, don't necessarily need to wait so long... */
336 signal(SIGALRM, pingstats);
341 static void sendping6(int junk ATTRIBUTE_UNUSED)
343 struct icmp6_hdr *pkt;
345 char packet[datalen + sizeof (struct icmp6_hdr)];
347 pkt = (struct icmp6_hdr *) packet;
349 pkt->icmp6_type = ICMP6_ECHO_REQUEST;
351 pkt->icmp6_cksum = 0;
352 pkt->icmp6_seq = htons(ntransmitted); /* don't ++ here, it can be a macro */
353 pkt->icmp6_id = myid;
354 CLR((uint16_t)ntransmitted % MAX_DUP_CHK);
357 gettimeofday((struct timeval *) &pkt->icmp6_data8[4], NULL);
359 i = sendto(pingsock, packet, sizeof(packet), 0,
360 &pingaddr.sa, sizeof(pingaddr.sin6));
363 bb_perror_msg_and_die("sendto");
364 if ((size_t)i != sizeof(packet))
365 bb_error_msg_and_die("ping wrote %d chars; %d expected", i,
366 (int)sizeof(packet));
368 signal(SIGALRM, sendping6);
369 if (pingcount == 0 || ntransmitted < pingcount) { /* schedule next in 1s */
371 } else { /* done, wait for the last ping to come back */
372 /* todo, don't necessarily need to wait so long... */
373 signal(SIGALRM, pingstats);
379 static char *icmp_type_name(int id)
382 case ICMP_ECHOREPLY: return "Echo Reply";
383 case ICMP_DEST_UNREACH: return "Destination Unreachable";
384 case ICMP_SOURCE_QUENCH: return "Source Quench";
385 case ICMP_REDIRECT: return "Redirect (change route)";
386 case ICMP_ECHO: return "Echo Request";
387 case ICMP_TIME_EXCEEDED: return "Time Exceeded";
388 case ICMP_PARAMETERPROB: return "Parameter Problem";
389 case ICMP_TIMESTAMP: return "Timestamp Request";
390 case ICMP_TIMESTAMPREPLY: return "Timestamp Reply";
391 case ICMP_INFO_REQUEST: return "Information Request";
392 case ICMP_INFO_REPLY: return "Information Reply";
393 case ICMP_ADDRESS: return "Address Mask Request";
394 case ICMP_ADDRESSREPLY: return "Address Mask Reply";
395 default: return "unknown ICMP type";
399 /* RFC3542 changed some definitions from RFC2292 for no good reason, whee!
400 * the newer 3542 uses a MLD_ prefix where as 2292 uses ICMP6_ prefix */
401 #ifndef MLD_LISTENER_QUERY
402 # define MLD_LISTENER_QUERY ICMP6_MEMBERSHIP_QUERY
404 #ifndef MLD_LISTENER_REPORT
405 # define MLD_LISTENER_REPORT ICMP6_MEMBERSHIP_REPORT
407 #ifndef MLD_LISTENER_REDUCTION
408 # define MLD_LISTENER_REDUCTION ICMP6_MEMBERSHIP_REDUCTION
410 static char *icmp6_type_name(int id)
413 case ICMP6_DST_UNREACH: return "Destination Unreachable";
414 case ICMP6_PACKET_TOO_BIG: return "Packet too big";
415 case ICMP6_TIME_EXCEEDED: return "Time Exceeded";
416 case ICMP6_PARAM_PROB: return "Parameter Problem";
417 case ICMP6_ECHO_REPLY: return "Echo Reply";
418 case ICMP6_ECHO_REQUEST: return "Echo Request";
419 case MLD_LISTENER_QUERY: return "Listener Query";
420 case MLD_LISTENER_REPORT: return "Listener Report";
421 case MLD_LISTENER_REDUCTION: return "Listener Reduction";
422 default: return "unknown ICMP type";
427 static void unpack(char *buf, int sz, struct sockaddr_in *from)
429 struct icmp *icmppkt;
431 struct timeval tv, *tp;
433 unsigned long triptime;
435 gettimeofday(&tv, NULL);
437 /* discard if too short */
438 if (sz < (datalen + ICMP_MINLEN))
441 /* check IP header */
442 iphdr = (struct iphdr *) buf;
443 hlen = iphdr->ihl << 2;
445 icmppkt = (struct icmp *) (buf + hlen);
446 if (icmppkt->icmp_id != myid)
447 return; /* not our ping */
449 if (icmppkt->icmp_type == ICMP_ECHOREPLY) {
450 uint16_t recv_seq = ntohs(icmppkt->icmp_seq);
452 tp = (struct timeval *) icmppkt->icmp_data;
454 if ((tv.tv_usec -= tp->tv_usec) < 0) {
456 tv.tv_usec += 1000000;
458 tv.tv_sec -= tp->tv_sec;
460 triptime = tv.tv_sec * 10000 + (tv.tv_usec / 100);
467 if (TST(recv_seq % MAX_DUP_CHK)) {
472 SET(recv_seq % MAX_DUP_CHK);
476 if (option_mask32 & OPT_QUIET)
479 printf("%d bytes from %s: icmp_seq=%u", sz,
480 inet_ntoa(*(struct in_addr *) &from->sin_addr.s_addr),
482 printf(" ttl=%d", iphdr->ttl);
483 printf(" time=%lu.%lu ms", triptime / 10, triptime % 10);
488 if (icmppkt->icmp_type != ICMP_ECHO)
489 bb_error_msg("warning: got ICMP %d (%s)",
491 icmp_type_name(icmppkt->icmp_type));
496 static void unpack6(char *packet, int sz, struct sockaddr_in6 *from, int hoplimit)
498 struct icmp6_hdr *icmppkt;
499 struct timeval tv, *tp;
501 unsigned long triptime;
502 char buf[INET6_ADDRSTRLEN];
504 gettimeofday(&tv, NULL);
506 /* discard if too short */
507 if (sz < (datalen + sizeof(struct icmp6_hdr)))
510 icmppkt = (struct icmp6_hdr *) packet;
511 if (icmppkt->icmp6_id != myid)
512 return; /* not our ping */
514 if (icmppkt->icmp6_type == ICMP6_ECHO_REPLY) {
515 uint16_t recv_seq = ntohs(icmppkt->icmp6_seq);
517 tp = (struct timeval *) &icmppkt->icmp6_data8[4];
519 if ((tv.tv_usec -= tp->tv_usec) < 0) {
521 tv.tv_usec += 1000000;
523 tv.tv_sec -= tp->tv_sec;
525 triptime = tv.tv_sec * 10000 + (tv.tv_usec / 100);
532 if (TST(recv_seq % MAX_DUP_CHK)) {
537 SET(recv_seq % MAX_DUP_CHK);
541 if (option_mask32 & OPT_QUIET)
544 printf("%d bytes from %s: icmp6_seq=%u", sz,
545 inet_ntop(AF_INET6, &pingaddr.sin6.sin6_addr,
548 printf(" ttl=%d time=%lu.%lu ms", hoplimit,
549 triptime / 10, triptime % 10);
554 if (icmppkt->icmp6_type != ICMP6_ECHO_REQUEST)
555 bb_error_msg("warning: got ICMP %d (%s)",
557 icmp6_type_name(icmppkt->icmp6_type));
563 static void ping(len_and_sockaddr *lsa)
565 char packet[datalen + MAXIPLEN + MAXICMPLEN];
568 pingsock = create_icmp_socket();
569 pingaddr.sin = lsa->sin;
570 if (sourceaddr.sin_addr.s_addr) {
571 xbind(pingsock, (struct sockaddr*)&sourceaddr, sizeof(sourceaddr));
574 /* enable broadcast pings */
575 setsockopt_broadcast(pingsock);
577 /* set recv buf for broadcast pings */
578 sockopt = 48 * 1024; /* explain why 48k? */
579 setsockopt(pingsock, SOL_SOCKET, SO_RCVBUF, &sockopt, sizeof(sockopt));
581 printf("PING %s (%s)", hostname, dotted);
582 if (sourceaddr.sin_addr.s_addr) {
584 inet_ntoa(*(struct in_addr *) &sourceaddr.sin_addr.s_addr));
586 printf(": %d data bytes\n", datalen);
588 signal(SIGINT, pingstats);
590 /* start the ping's going ... */
593 /* listen for replies */
595 struct sockaddr_in from;
596 socklen_t fromlen = (socklen_t) sizeof(from);
599 c = recvfrom(pingsock, packet, sizeof(packet), 0,
600 (struct sockaddr *) &from, &fromlen);
603 bb_perror_msg("recvfrom");
606 unpack(packet, c, &from);
607 if (pingcount > 0 && nreceived >= pingcount)
612 extern int BUG_bad_offsetof_icmp6_cksum(void);
613 static void ping6(len_and_sockaddr *lsa)
615 char packet[datalen + MAXIPLEN + MAXICMPLEN];
616 char buf[INET6_ADDRSTRLEN];
619 struct sockaddr_in6 from;
621 char control_buf[CMSG_SPACE(36)];
623 pingsock = create_icmp6_socket();
624 pingaddr.sin6 = lsa->sin6;
625 //if (sourceaddr.sin_addr.s_addr) {
626 // xbind(pingsock, (struct sockaddr*)&sourceaddr, sizeof(sourceaddr));
631 struct icmp6_filter filt;
632 if (!(option_mask32 & OPT_VERBOSE)) {
633 ICMP6_FILTER_SETBLOCKALL(&filt);
634 ICMP6_FILTER_SETPASS(ICMP6_ECHO_REPLY, &filt);
636 ICMP6_FILTER_SETPASSALL(&filt);
638 if (setsockopt(pingsock, IPPROTO_ICMPV6, ICMP6_FILTER, &filt,
640 bb_error_msg_and_die("setsockopt(ICMP6_FILTER)");
642 #endif /*ICMP6_FILTER*/
644 /* enable broadcast pings */
645 setsockopt_broadcast(pingsock);
647 /* set recv buf for broadcast pings */
648 sockopt = 48 * 1024; /* explain why 48k? */
649 setsockopt(pingsock, SOL_SOCKET, SO_RCVBUF, &sockopt, sizeof(sockopt));
651 sockopt = offsetof(struct icmp6_hdr, icmp6_cksum);
652 if (offsetof(struct icmp6_hdr, icmp6_cksum) != 2)
653 BUG_bad_offsetof_icmp6_cksum();
654 setsockopt(pingsock, SOL_RAW, IPV6_CHECKSUM, &sockopt, sizeof(sockopt));
656 /* request ttl info to be returned in ancillary data */
657 setsockopt(pingsock, SOL_IPV6, IPV6_HOPLIMIT, &const_int_1, sizeof(const_int_1));
660 pingaddr.sin6_scope_id = if_index;
662 printf("PING %s (%s): %d data bytes\n", hostname, dotted, datalen);
664 signal(SIGINT, pingstats);
666 /* start the ping's going ... */
669 /* listen for replies */
670 msg.msg_name = &from;
671 msg.msg_namelen = sizeof(from);
674 msg.msg_control = control_buf;
675 iov.iov_base = packet;
676 iov.iov_len = sizeof(packet);
681 msg.msg_controllen = sizeof(control_buf);
683 c = recvmsg(pingsock, &msg, 0);
686 bb_perror_msg("recvfrom");
689 for (mp = CMSG_FIRSTHDR(&msg); mp; mp = CMSG_NXTHDR(&msg, mp)) {
690 if (mp->cmsg_level == SOL_IPV6
691 && mp->cmsg_type == IPV6_HOPLIMIT
692 /* don't check len - we trust the kernel: */
693 /* && mp->cmsg_len >= CMSG_LEN(sizeof(int)) */
695 hoplimit = *(int*)CMSG_DATA(mp);
698 unpack6(packet, c, &from, hoplimit);
699 if (pingcount > 0 && nreceived >= pingcount)
705 /* TODO: consolidate ether-wake.c, dnsd.c, ifupdown.c, nslookup.c
706 * versions of below thing. BTW we have far too many "%u.%u.%u.%u" too...
708 static int parse_nipquad(const char *str, struct sockaddr_in* addr)
711 unsigned i1, i2, i3, i4;
712 if (sscanf(str, "%u.%u.%u.%u%c",
713 &i1, &i2, &i3, &i4, &dummy) == 4
714 && ( (i1|i2|i3|i4) <= 0xff )
716 uint8_t* ptr = (uint8_t*)&addr->sin_addr;
723 return 1; /* error */
726 int ping_main(int argc, char **argv)
728 const char *hostname;
729 char *opt_c, *opt_s, *opt_I;
730 USE_PING6(sa_family_t af = AF_UNSPEC;)
732 datalen = DEFDATALEN; /* initialized here rather than in global scope to work around gcc bug */
734 /* exactly one argument needed, -v and -q don't mix. So do 4, 6 */
735 opt_complementary = "=1:q--v:v--q";
736 getopt32(argc, argv, OPT_STRING, &opt_c, &opt_s, &opt_I);
737 if (option_mask32 & OPT_c) pingcount = xatoul(opt_c); // -c
738 if (option_mask32 & OPT_s) datalen = xatou16(opt_s); // -s
739 if (option_mask32 & OPT_I) { // -I
740 if_index = if_nametoindex(opt_I);
742 if (parse_nipquad(opt_I, &sourceaddr))
745 myid = (int16_t) getpid();
746 hostname = argv[optind];
748 if (option_mask32 & OPT_IPV4)
750 if (option_mask32 & OPT_IPV6)
752 lsa = host_and_af2sockaddr(hostname, 0, af);
754 lsa = host_and_af2sockaddr(hostname, 0, AF_INET);
756 dotted = xmalloc_sockaddr2dotted_noport(lsa->sa, lsa->len);
758 if (lsa->sa.sa_family == AF_INET6)
766 #endif /* FEATURE_FANCY_PING */
770 int ping6_main(int argc, char **argv)
773 return ping_main(argc + 1, argv - 1);
778 * Copyright (c) 1989 The Regents of the University of California.
779 * All rights reserved.
781 * This code is derived from software contributed to Berkeley by
784 * Redistribution and use in source and binary forms, with or without
785 * modification, are permitted provided that the following conditions
787 * 1. Redistributions of source code must retain the above copyright
788 * notice, this list of conditions and the following disclaimer.
789 * 2. Redistributions in binary form must reproduce the above copyright
790 * notice, this list of conditions and the following disclaimer in the
791 * documentation and/or other materials provided with the distribution.
793 * 3. <BSD Advertising Clause omitted per the July 22, 1999 licensing change
794 * ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change>
796 * 4. Neither the name of the University nor the names of its contributors
797 * may be used to endorse or promote products derived from this software
798 * without specific prior written permission.
800 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
801 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
802 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
803 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
804 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
805 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
806 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
807 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
808 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
809 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF