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 source tree.
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>
28 //config: bool "ping (9.5 kb)"
30 //config: select PLATFORM_LINUX
32 //config: ping uses the ICMP protocol's mandatory ECHO_REQUEST datagram to
33 //config: elicit an ICMP ECHO_RESPONSE from a host or gateway.
36 //config: bool "ping6 (10 kb)"
38 //config: depends on FEATURE_IPV6
40 //config: Alias to "ping -6".
42 //config:config FEATURE_FANCY_PING
43 //config: bool "Enable fancy ping output"
45 //config: depends on PING || PING6
47 //config: With this option off, ping will say "HOST is alive!"
48 //config: or terminate with SIGALRM in 5 seconds otherwise.
49 //config: No command-line options will be recognized.
51 /* Needs socket(AF_INET, SOCK_RAW, IPPROTO_ICMP), therefore BB_SUID_MAYBE: */
52 //applet:IF_PING(APPLET(ping, BB_DIR_BIN, BB_SUID_MAYBE))
53 //applet:IF_PING6(APPLET(ping6, BB_DIR_BIN, BB_SUID_MAYBE))
55 //kbuild:lib-$(CONFIG_PING) += ping.o
56 //kbuild:lib-$(CONFIG_PING6) += ping.o
58 //usage:#if !ENABLE_FEATURE_FANCY_PING
59 //usage:# define ping_trivial_usage
61 //usage:# define ping_full_usage "\n\n"
62 //usage: "Send ICMP ECHO_REQUEST packets to network hosts"
63 //usage:# define ping6_trivial_usage
65 //usage:# define ping6_full_usage "\n\n"
66 //usage: "Send ICMP ECHO_REQUEST packets to network hosts"
68 //usage:# define ping_trivial_usage
69 //usage: "[OPTIONS] HOST"
70 //usage:# define ping_full_usage "\n\n"
71 //usage: "Send ICMP ECHO_REQUEST packets to network hosts\n"
73 //usage: "\n -4,-6 Force IP or IPv6 name resolution"
75 //usage: "\n -c CNT Send only CNT pings"
76 //usage: "\n -s SIZE Send SIZE data bytes in packets (default 56)"
77 //usage: "\n -i SECS Interval"
78 //usage: "\n -A Ping as soon as reply is recevied"
79 //usage: "\n -t TTL Set TTL"
80 //usage: "\n -I IFACE/IP Source interface or IP address"
81 //usage: "\n -W SEC Seconds to wait for the first response (default 10)"
82 //usage: "\n (after all -c CNT packets are sent)"
83 //usage: "\n -w SEC Seconds until ping exits (default:infinite)"
84 //usage: "\n (can exit earlier with -c CNT)"
85 //usage: "\n -q Quiet, only display output at start"
86 //usage: "\n and when finished"
87 //usage: "\n -p HEXBYTE Pattern to use for payload"
89 //usage:# define ping6_trivial_usage
90 //usage: "[OPTIONS] HOST"
91 //usage:# define ping6_full_usage "\n\n"
92 //usage: "Send ICMP ECHO_REQUEST packets to network hosts\n"
93 //usage: "\n -c CNT Send only CNT pings"
94 //usage: "\n -s SIZE Send SIZE data bytes in packets (default 56)"
95 //usage: "\n -i SECS Interval"
96 //usage: "\n -A Ping as soon as reply is recevied"
97 //usage: "\n -I IFACE/IP Source interface or IP address"
98 //usage: "\n -q Quiet, only display output at start"
99 //usage: "\n and when finished"
100 //usage: "\n -p HEXBYTE Pattern to use for payload"
104 //usage:#define ping_example_usage
105 //usage: "$ ping localhost\n"
106 //usage: "PING slag (127.0.0.1): 56 data bytes\n"
107 //usage: "64 bytes from 127.0.0.1: icmp_seq=0 ttl=255 time=20.1 ms\n"
109 //usage: "--- debian ping statistics ---\n"
110 //usage: "1 packets transmitted, 1 packets received, 0% packet loss\n"
111 //usage: "round-trip min/avg/max = 20.1/20.1/20.1 ms\n"
112 //usage:#define ping6_example_usage
113 //usage: "$ ping6 ip6-localhost\n"
114 //usage: "PING ip6-localhost (::1): 56 data bytes\n"
115 //usage: "64 bytes from ::1: icmp6_seq=0 ttl=64 time=20.1 ms\n"
117 //usage: "--- ip6-localhost ping statistics ---\n"
118 //usage: "1 packets transmitted, 1 packets received, 0% packet loss\n"
119 //usage: "round-trip min/avg/max = 20.1/20.1/20.1 ms\n"
122 #include <netinet/ip_icmp.h>
124 #include "common_bufsiz.h"
127 /* should be in netinet/ip_icmp.h */
128 # define ICMP_DEST_UNREACH 3 /* Destination Unreachable */
129 # define ICMP_SOURCE_QUENCH 4 /* Source Quench */
130 # define ICMP_REDIRECT 5 /* Redirect (change route) */
131 # define ICMP_ECHO 8 /* Echo Request */
132 # define ICMP_TIME_EXCEEDED 11 /* Time Exceeded */
133 # define ICMP_PARAMETERPROB 12 /* Parameter Problem */
134 # define ICMP_TIMESTAMP 13 /* Timestamp Request */
135 # define ICMP_TIMESTAMPREPLY 14 /* Timestamp Reply */
136 # define ICMP_INFO_REQUEST 15 /* Information Request */
137 # define ICMP_INFO_REPLY 16 /* Information Reply */
138 # define ICMP_ADDRESS 17 /* Address Mask Request */
139 # define ICMP_ADDRESSREPLY 18 /* Address Mask Reply */
142 /* Some operating systems, like GNU/Hurd, don't define SOL_RAW, but do have
143 * IPPROTO_RAW. Since the IPPROTO definitions are also valid to use for
144 * setsockopt (and take the same value as their corresponding SOL definitions,
145 * if they exist), we can just fall back on IPPROTO_RAW. */
147 # define SOL_RAW IPPROTO_RAW
151 # include <netinet/icmp6.h>
152 /* I see RENUMBERED constants in bits/in.h - !!?
153 * What a fuck is going on with libc? Is it a glibc joke? */
154 # ifdef IPV6_2292HOPLIMIT
155 # undef IPV6_HOPLIMIT
156 # define IPV6_HOPLIMIT IPV6_2292HOPLIMIT
164 MAX_DUP_CHK = (8 * 128),
166 PINGINTERVAL = 1, /* 1 second */
172 create_icmp_socket(len_and_sockaddr *lsa)
174 create_icmp_socket(void)
175 #define create_icmp_socket(lsa) create_icmp_socket()
180 if (lsa->u.sa.sa_family == AF_INET6)
181 sock = socket(AF_INET6, SOCK_RAW, IPPROTO_ICMPV6);
184 sock = socket(AF_INET, SOCK_RAW, 1); /* 1 == ICMP */
187 bb_error_msg_and_die(bb_msg_perm_denied_are_you_root);
188 bb_perror_msg_and_die(bb_msg_can_not_create_raw_socket);
191 xmove_fd(sock, pingsock);
194 #if !ENABLE_FEATURE_FANCY_PING
200 char packet[DEFDATALEN + MAXIPLEN + MAXICMPLEN];
203 #define G (*(struct globals*)bb_common_bufsiz1)
204 #define INIT_G() do { setup_common_bufsiz(); } while (0)
206 static void noresp(int ign UNUSED_PARAM)
208 printf("No response from %s\n", G.hostname);
212 static void ping4(len_and_sockaddr *lsa)
217 pkt = (struct icmp *) G.packet;
218 /*memset(pkt, 0, sizeof(G.packet)); already is */
219 pkt->icmp_type = ICMP_ECHO;
220 pkt->icmp_id = G.myid;
221 pkt->icmp_cksum = inet_cksum((uint16_t *) pkt, sizeof(G.packet));
223 xsendto(pingsock, G.packet, DEFDATALEN + ICMP_MINLEN, &lsa->u.sa, lsa->len);
225 /* listen for replies */
228 struct sockaddr_in from;
229 socklen_t fromlen = sizeof(from);
231 c = recvfrom(pingsock, G.packet, sizeof(G.packet), 0,
232 (struct sockaddr *) &from, &fromlen);
234 c = recv(pingsock, G.packet, sizeof(G.packet), 0);
238 bb_perror_msg("recvfrom");
241 if (c >= 76) { /* ip + icmp */
242 struct iphdr *iphdr = (struct iphdr *) G.packet;
244 pkt = (struct icmp *) (G.packet + (iphdr->ihl << 2)); /* skip ip hdr */
245 if (pkt->icmp_id != G.myid)
246 continue; /* not our ping */
247 if (pkt->icmp_type == ICMP_ECHOREPLY)
254 static void ping6(len_and_sockaddr *lsa)
256 struct icmp6_hdr *pkt;
260 pkt = (struct icmp6_hdr *) G.packet;
261 /*memset(pkt, 0, sizeof(G.packet)); already is */
262 pkt->icmp6_type = ICMP6_ECHO_REQUEST;
263 pkt->icmp6_id = G.myid;
265 sockopt = offsetof(struct icmp6_hdr, icmp6_cksum);
266 setsockopt_int(pingsock, SOL_RAW, IPV6_CHECKSUM, sockopt);
268 xsendto(pingsock, G.packet, DEFDATALEN + sizeof(struct icmp6_hdr), &lsa->u.sa, lsa->len);
270 /* listen for replies */
273 struct sockaddr_in6 from;
274 socklen_t fromlen = sizeof(from);
276 c = recvfrom(pingsock, G.packet, sizeof(G.packet), 0,
277 (struct sockaddr *) &from, &fromlen);
279 c = recv(pingsock, G.packet, sizeof(G.packet), 0);
283 bb_perror_msg("recvfrom");
286 if (c >= ICMP_MINLEN) { /* icmp6_hdr */
287 if (pkt->icmp6_id != G.myid)
288 continue; /* not our ping */
289 if (pkt->icmp6_type == ICMP6_ECHO_REPLY)
297 # define common_ping_main(af, argv) common_ping_main(argv)
299 static int common_ping_main(sa_family_t af, char **argv)
301 len_and_sockaddr *lsa;
306 while ((++argv)[0] && argv[0][0] == '-') {
307 if (argv[0][1] == '4') {
311 if (argv[0][1] == '6') {
326 lsa = xhost_and_af2sockaddr(G.hostname, 0, af);
328 lsa = xhost_and_af2sockaddr(G.hostname, 0, AF_INET);
330 /* Set timer _after_ DNS resolution */
331 signal(SIGALRM, noresp);
332 alarm(5); /* give the host 5000ms to respond */
334 create_icmp_socket(lsa);
335 G.myid = (uint16_t) getpid();
337 if (lsa->u.sa.sa_family == AF_INET6)
342 if (ENABLE_FEATURE_CLEAN_UP)
344 printf("%s is alive!\n", G.hostname);
349 #else /* FEATURE_FANCY_PING */
352 /* Full(er) version */
354 /* -c NUM, -t NUM, -w NUM, -W NUM */
355 #define OPT_STRING "qvAc:+s:t:+w:+W:+I:np:i:4"IF_PING6("6")
358 OPT_VERBOSE = 1 << 1,
366 /*OPT_n = 1 << 9, - ignored */
370 OPT_IPV6 = (1 << 13) * ENABLE_PING6,
377 len_and_sockaddr *source_lsa;
379 unsigned pingcount; /* must be int-sized */
381 unsigned long ntransmitted, nreceived, nrepeats;
384 unsigned tmin, tmax; /* in us */
385 unsigned long long tsum; /* in us, sum of all times */
386 unsigned cur_us; /* low word only, we don't need more */
387 unsigned deadline_us;
388 unsigned interval_us;
390 unsigned sizeof_rcv_packet;
391 char *rcv_packet; /* [datalen + MAXIPLEN + MAXICMPLEN] */
392 void *snd_packet; /* [datalen + ipv4/ipv6_const] */
393 const char *hostname;
397 struct sockaddr_in sin;
399 struct sockaddr_in6 sin6;
402 unsigned char rcvd_tbl[MAX_DUP_CHK / 8];
404 #define G (*(struct globals*)bb_common_bufsiz1)
405 #define if_index (G.if_index )
406 #define source_lsa (G.source_lsa )
407 #define str_I (G.str_I )
408 #define datalen (G.datalen )
409 #define pingcount (G.pingcount )
410 #define opt_ttl (G.opt_ttl )
411 #define myid (G.myid )
412 #define tmin (G.tmin )
413 #define tmax (G.tmax )
414 #define tsum (G.tsum )
415 #define timeout (G.timeout )
416 #define hostname (G.hostname )
417 #define dotted (G.dotted )
418 #define pingaddr (G.pingaddr )
419 #define rcvd_tbl (G.rcvd_tbl )
420 #define INIT_G() do { \
421 setup_common_bufsiz(); \
422 BUILD_BUG_ON(sizeof(G) > COMMON_BUFSIZE); \
423 datalen = DEFDATALEN; \
429 #define BYTE(bit) rcvd_tbl[(bit)>>3]
430 #define MASK(bit) (1 << ((bit) & 7))
431 #define SET(bit) (BYTE(bit) |= MASK(bit))
432 #define CLR(bit) (BYTE(bit) &= (~MASK(bit)))
433 #define TST(bit) (BYTE(bit) & MASK(bit))
435 static void print_stats_and_exit(int junk) NORETURN;
436 static void print_stats_and_exit(int junk UNUSED_PARAM)
441 signal(SIGINT, SIG_IGN);
444 printf("\n--- %s ping statistics ---\n"
445 "%lu packets transmitted, "
446 "%lu packets received, ",
447 hostname, G.ntransmitted, nrecv
450 printf("%lu duplicates, ", G.nrepeats);
453 ul = (ul - nrecv) * 100 / ul;
454 printf("%lu%% packet loss\n", ul);
455 if (tmin != UINT_MAX) {
456 unsigned tavg = tsum / (nrecv + G.nrepeats);
457 printf("round-trip min/avg/max = %u.%03u/%u.%03u/%u.%03u ms\n",
458 tmin / 1000, tmin % 1000,
459 tavg / 1000, tavg % 1000,
460 tmax / 1000, tmax % 1000);
462 /* if condition is true, exit with 1 -- 'failure' */
463 exit(nrecv == 0 || (G.deadline_us && nrecv < pingcount));
466 static void sendping_tail(void (*sp)(int), int size_pkt)
470 CLR((uint16_t)G.ntransmitted % MAX_DUP_CHK);
476 unsigned n = G.cur_us - G.deadline_us;
478 print_stats_and_exit(0);
481 /* sizeof(pingaddr) can be larger than real sa size, but I think
482 * it doesn't matter */
483 sz = xsendto(pingsock, G.snd_packet, size_pkt, &pingaddr.sa, sizeof(pingaddr));
485 bb_error_msg_and_die(bb_msg_write_error);
487 if (pingcount == 0 || G.ntransmitted < pingcount) {
488 /* Didn't send all pings yet - schedule next in -i SEC interval */
491 /*ualarm(G.interval_us, 0); - does not work for >=1sec on some libc */
492 i.it_interval.tv_sec = 0;
493 i.it_interval.tv_usec = 0;
494 i.it_value.tv_sec = G.interval_us / 1000000;
495 i.it_value.tv_usec = G.interval_us % 1000000;
496 setitimer(ITIMER_REAL, &i, NULL);
497 } else { /* -c NN, and all NN are sent */
498 /* Wait for the last ping to come back.
499 * -W timeout: wait for a response in seconds.
500 * Affects only timeout in absence of any responses,
501 * otherwise ping waits for two RTTs. */
502 unsigned expire = timeout;
505 /* approx. 2*tmax, in seconds (2 RTT) */
506 expire = tmax / (512*1024);
510 signal(SIGALRM, print_stats_and_exit);
515 static void sendping4(int junk UNUSED_PARAM)
517 struct icmp *pkt = G.snd_packet;
519 memset(pkt, G.pattern, datalen + ICMP_MINLEN + 4);
520 pkt->icmp_type = ICMP_ECHO;
521 /*pkt->icmp_code = 0;*/
522 pkt->icmp_cksum = 0; /* cksum is calculated with this field set to 0 */
523 pkt->icmp_seq = htons(G.ntransmitted); /* don't ++ here, it can be a macro */
526 /* If datalen < 4, we store timestamp _past_ the packet,
527 * but it's ok - we allocated 4 extra bytes in xzalloc() just in case.
529 /*if (datalen >= 4)*/
530 /* No hton: we'll read it back on the same machine */
531 *(uint32_t*)&pkt->icmp_dun = G.cur_us = monotonic_us();
533 pkt->icmp_cksum = inet_cksum((uint16_t *) pkt, datalen + ICMP_MINLEN);
535 sendping_tail(sendping4, ICMP_MINLEN);
538 static void sendping6(int junk UNUSED_PARAM)
540 struct icmp6_hdr *pkt = G.snd_packet;
542 memset(pkt, G.pattern, datalen + sizeof(struct icmp6_hdr) + 4);
543 pkt->icmp6_type = ICMP6_ECHO_REQUEST;
544 /*pkt->icmp6_code = 0;*/
545 /*pkt->icmp6_cksum = 0;*/
546 pkt->icmp6_seq = htons(G.ntransmitted); /* don't ++ here, it can be a macro */
547 pkt->icmp6_id = myid;
549 /*if (datalen >= 4)*/
550 *(bb__aliased_uint32_t*)(&pkt->icmp6_data8[4]) = G.cur_us = monotonic_us();
552 //TODO? pkt->icmp_cksum = inet_cksum(...);
554 sendping_tail(sendping6, sizeof(struct icmp6_hdr));
558 static const char *icmp_type_name(int id)
561 case ICMP_ECHOREPLY: return "Echo Reply";
562 case ICMP_DEST_UNREACH: return "Destination Unreachable";
563 case ICMP_SOURCE_QUENCH: return "Source Quench";
564 case ICMP_REDIRECT: return "Redirect (change route)";
565 case ICMP_ECHO: return "Echo Request";
566 case ICMP_TIME_EXCEEDED: return "Time Exceeded";
567 case ICMP_PARAMETERPROB: return "Parameter Problem";
568 case ICMP_TIMESTAMP: return "Timestamp Request";
569 case ICMP_TIMESTAMPREPLY: return "Timestamp Reply";
570 case ICMP_INFO_REQUEST: return "Information Request";
571 case ICMP_INFO_REPLY: return "Information Reply";
572 case ICMP_ADDRESS: return "Address Mask Request";
573 case ICMP_ADDRESSREPLY: return "Address Mask Reply";
574 default: return "unknown ICMP type";
578 /* RFC3542 changed some definitions from RFC2292 for no good reason, whee!
579 * the newer 3542 uses a MLD_ prefix where as 2292 uses ICMP6_ prefix */
580 #ifndef MLD_LISTENER_QUERY
581 # define MLD_LISTENER_QUERY ICMP6_MEMBERSHIP_QUERY
583 #ifndef MLD_LISTENER_REPORT
584 # define MLD_LISTENER_REPORT ICMP6_MEMBERSHIP_REPORT
586 #ifndef MLD_LISTENER_REDUCTION
587 # define MLD_LISTENER_REDUCTION ICMP6_MEMBERSHIP_REDUCTION
589 static const char *icmp6_type_name(int id)
592 case ICMP6_DST_UNREACH: return "Destination Unreachable";
593 case ICMP6_PACKET_TOO_BIG: return "Packet too big";
594 case ICMP6_TIME_EXCEEDED: return "Time Exceeded";
595 case ICMP6_PARAM_PROB: return "Parameter Problem";
596 case ICMP6_ECHO_REPLY: return "Echo Reply";
597 case ICMP6_ECHO_REQUEST: return "Echo Request";
598 case MLD_LISTENER_QUERY: return "Listener Query";
599 case MLD_LISTENER_REPORT: return "Listener Report";
600 case MLD_LISTENER_REDUCTION: return "Listener Reduction";
601 default: return "unknown ICMP type";
606 static void unpack_tail(int sz, uint32_t *tp,
607 const char *from_str,
608 uint16_t recv_seq, int ttl)
611 const char *dupmsg = " (DUP!)";
612 unsigned triptime = triptime; /* for gcc */
615 /* (int32_t) cast is for hypothetical 64-bit unsigned */
616 /* (doesn't hurt 32-bit real-world anyway) */
617 triptime = (int32_t) ((uint32_t)monotonic_us() - *tp);
625 b = &BYTE(recv_seq % MAX_DUP_CHK);
626 m = MASK(recv_seq % MAX_DUP_CHK);
627 /*if TST(recv_seq % MAX_DUP_CHK):*/
631 /*SET(recv_seq % MAX_DUP_CHK):*/
637 if (option_mask32 & OPT_QUIET)
640 printf("%d bytes from %s: seq=%u ttl=%d", sz,
641 from_str, recv_seq, ttl);
643 printf(" time=%u.%03u ms", triptime / 1000, triptime % 1000);
647 static int unpack4(char *buf, int sz, struct sockaddr_in *from)
649 struct icmp *icmppkt;
653 /* discard if too short */
654 if (sz < (datalen + ICMP_MINLEN))
657 /* check IP header */
658 iphdr = (struct iphdr *) buf;
659 hlen = iphdr->ihl << 2;
661 icmppkt = (struct icmp *) (buf + hlen);
662 if (icmppkt->icmp_id != myid)
663 return 0; /* not our ping */
665 if (icmppkt->icmp_type == ICMP_ECHOREPLY) {
666 uint16_t recv_seq = ntohs(icmppkt->icmp_seq);
669 if (sz >= ICMP_MINLEN + sizeof(uint32_t))
670 tp = (uint32_t *) icmppkt->icmp_data;
672 inet_ntoa(*(struct in_addr *) &from->sin_addr.s_addr),
673 recv_seq, iphdr->ttl);
676 if (icmppkt->icmp_type != ICMP_ECHO) {
677 bb_error_msg("warning: got ICMP %d (%s)",
679 icmp_type_name(icmppkt->icmp_type));
684 static int unpack6(char *packet, int sz, struct sockaddr_in6 *from, int hoplimit)
686 struct icmp6_hdr *icmppkt;
687 char buf[INET6_ADDRSTRLEN];
689 /* discard if too short */
690 if (sz < (datalen + sizeof(struct icmp6_hdr)))
693 icmppkt = (struct icmp6_hdr *) packet;
694 if (icmppkt->icmp6_id != myid)
695 return 0; /* not our ping */
697 if (icmppkt->icmp6_type == ICMP6_ECHO_REPLY) {
698 uint16_t recv_seq = ntohs(icmppkt->icmp6_seq);
701 if (sz >= sizeof(struct icmp6_hdr) + sizeof(uint32_t))
702 tp = (uint32_t *) &icmppkt->icmp6_data8[4];
704 inet_ntop(AF_INET6, &from->sin6_addr,
709 if (icmppkt->icmp6_type != ICMP6_ECHO_REQUEST) {
710 bb_error_msg("warning: got ICMP %d (%s)",
712 icmp6_type_name(icmppkt->icmp6_type));
718 static void ping4(len_and_sockaddr *lsa)
722 pingaddr.sin = lsa->u.sin;
724 if (setsockopt(pingsock, IPPROTO_IP, IP_MULTICAST_IF,
725 &source_lsa->u.sa, source_lsa->len))
726 bb_error_msg_and_die("can't set multicast source interface");
727 xbind(pingsock, &source_lsa->u.sa, source_lsa->len);
730 /* enable broadcast pings */
731 setsockopt_broadcast(pingsock);
733 /* set recv buf (needed if we can get lots of responses: flood ping,
734 * broadcast ping etc) */
735 sockopt = (datalen * 2) + 7 * 1024; /* giving it a bit of extra room */
736 setsockopt_SOL_SOCKET_int(pingsock, SO_RCVBUF, sockopt);
739 setsockopt_int(pingsock, IPPROTO_IP, IP_TTL, opt_ttl);
740 /* above doesn't affect packets sent to bcast IP, so... */
741 setsockopt_int(pingsock, IPPROTO_IP, IP_MULTICAST_TTL, opt_ttl);
744 signal(SIGINT, print_stats_and_exit);
746 /* start the ping's going ... */
750 /* listen for replies */
752 struct sockaddr_in from;
753 socklen_t fromlen = (socklen_t) sizeof(from);
756 c = recvfrom(pingsock, G.rcv_packet, G.sizeof_rcv_packet, 0,
757 (struct sockaddr *) &from, &fromlen);
760 bb_perror_msg("recvfrom");
763 c = unpack4(G.rcv_packet, c, &from);
764 if (pingcount && G.nreceived >= pingcount)
766 if (c && (option_mask32 & OPT_A)) {
772 static void ping6(len_and_sockaddr *lsa)
776 struct sockaddr_in6 from;
778 char control_buf[CMSG_SPACE(36)];
780 pingaddr.sin6 = lsa->u.sin6;
782 xbind(pingsock, &source_lsa->u.sa, source_lsa->len);
786 struct icmp6_filter filt;
787 if (!(option_mask32 & OPT_VERBOSE)) {
788 ICMP6_FILTER_SETBLOCKALL(&filt);
789 ICMP6_FILTER_SETPASS(ICMP6_ECHO_REPLY, &filt);
791 ICMP6_FILTER_SETPASSALL(&filt);
793 if (setsockopt(pingsock, IPPROTO_ICMPV6, ICMP6_FILTER, &filt,
795 bb_error_msg_and_die("setsockopt(%s)", "ICMP6_FILTER");
797 #endif /*ICMP6_FILTER*/
799 /* enable broadcast pings */
800 setsockopt_broadcast(pingsock);
802 /* set recv buf (needed if we can get lots of responses: flood ping,
803 * broadcast ping etc) */
804 sockopt = (datalen * 2) + 7 * 1024; /* giving it a bit of extra room */
805 setsockopt_SOL_SOCKET_int(pingsock, SO_RCVBUF, sockopt);
807 sockopt = offsetof(struct icmp6_hdr, icmp6_cksum);
808 BUILD_BUG_ON(offsetof(struct icmp6_hdr, icmp6_cksum) != 2);
809 setsockopt_int(pingsock, SOL_RAW, IPV6_CHECKSUM, sockopt);
811 /* request ttl info to be returned in ancillary data */
812 setsockopt_1(pingsock, SOL_IPV6, IPV6_HOPLIMIT);
815 pingaddr.sin6.sin6_scope_id = if_index;
817 signal(SIGINT, print_stats_and_exit);
819 msg.msg_name = &from;
820 msg.msg_namelen = sizeof(from);
823 msg.msg_control = control_buf;
824 iov.iov_base = G.rcv_packet;
825 iov.iov_len = G.sizeof_rcv_packet;
827 /* start the ping's going ... */
831 /* listen for replies */
837 msg.msg_controllen = sizeof(control_buf);
838 c = recvmsg(pingsock, &msg, 0);
841 bb_perror_msg("recvfrom");
844 for (mp = CMSG_FIRSTHDR(&msg); mp; mp = CMSG_NXTHDR(&msg, mp)) {
845 if (mp->cmsg_level == SOL_IPV6
846 && mp->cmsg_type == IPV6_HOPLIMIT
847 /* don't check len - we trust the kernel: */
848 /* && mp->cmsg_len >= CMSG_LEN(sizeof(int)) */
850 /*hoplimit = *(int*)CMSG_DATA(mp); - unaligned access */
851 move_from_unaligned_int(hoplimit, CMSG_DATA(mp));
854 c = unpack6(G.rcv_packet, c, &from, hoplimit);
855 if (pingcount && G.nreceived >= pingcount)
857 if (c && (option_mask32 & OPT_A)) {
864 static void ping(len_and_sockaddr *lsa)
866 printf("PING %s (%s)", hostname, dotted);
869 xmalloc_sockaddr2dotted_noport(&source_lsa->u.sa));
871 printf(": %d data bytes\n", datalen);
873 create_icmp_socket(lsa);
874 /* untested whether "-I addr" really works for IPv6: */
876 setsockopt_bindtodevice(pingsock, str_I);
878 G.sizeof_rcv_packet = datalen + MAXIPLEN + MAXICMPLEN;
879 G.rcv_packet = xzalloc(G.sizeof_rcv_packet);
881 if (lsa->u.sa.sa_family == AF_INET6) {
882 /* +4 reserves a place for timestamp, which may end up sitting
883 * _after_ packet. Saves one if() - see sendping4/6() */
884 G.snd_packet = xzalloc(datalen + sizeof(struct icmp6_hdr) + 4);
889 G.snd_packet = xzalloc(datalen + ICMP_MINLEN + 4);
894 static int common_ping_main(int opt, char **argv)
896 len_and_sockaddr *lsa;
898 char *str_i = (char*)"1";
903 opt |= getopt32(argv, "^"
905 /* exactly one arg; -v and -q don't mix */
907 &pingcount, &str_s, &opt_ttl, &G.deadline_us, &timeout, &str_I, &str_p, &str_i
910 datalen = xatou16(str_s); // -s
911 if (opt & OPT_I) { // -I
912 if_index = if_nametoindex(str_I);
914 /* TODO: I'm not sure it takes IPv6 unless in [XX:XX..] format */
915 source_lsa = xdotted2sockaddr(str_I, 0);
916 str_I = NULL; /* don't try to bind to device later */
920 G.pattern = xstrtou_range(str_p, 16, 0, 255);
922 unsigned d = G.deadline_us < INT_MAX/1000000 ? G.deadline_us : INT_MAX/1000000;
923 G.deadline_us = 1 | ((d * 1000000) + monotonic_us());
925 interval = parse_duration_str(str_i);
926 if (interval > INT_MAX/1000000)
927 interval = INT_MAX/1000000;
928 G.interval_us = interval * 1000000;
930 myid = (uint16_t) getpid();
931 hostname = argv[optind];
934 sa_family_t af = AF_UNSPEC;
939 lsa = xhost_and_af2sockaddr(hostname, 0, af);
942 lsa = xhost_and_af2sockaddr(hostname, 0, AF_INET);
945 if (source_lsa && source_lsa->u.sa.sa_family != lsa->u.sa.sa_family)
946 /* leaking it here... */
949 dotted = xmalloc_sockaddr2dotted_noport(&lsa->u.sa);
951 print_stats_and_exit(0);
952 /*return EXIT_SUCCESS;*/
954 #endif /* FEATURE_FANCY_PING */
958 int ping_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
959 int ping_main(int argc UNUSED_PARAM, char **argv)
961 # if !ENABLE_FEATURE_FANCY_PING
962 return common_ping_main(AF_UNSPEC, argv);
964 return common_ping_main(0, argv);
970 int ping6_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
971 int ping6_main(int argc UNUSED_PARAM, char **argv)
973 # if !ENABLE_FEATURE_FANCY_PING
974 return common_ping_main(AF_INET6, argv);
976 return common_ping_main(OPT_IPV6, argv);
982 * Copyright (c) 1989 The Regents of the University of California.
983 * All rights reserved.
985 * This code is derived from software contributed to Berkeley by
988 * Redistribution and use in source and binary forms, with or without
989 * modification, are permitted provided that the following conditions
991 * 1. Redistributions of source code must retain the above copyright
992 * notice, this list of conditions and the following disclaimer.
993 * 2. Redistributions in binary form must reproduce the above copyright
994 * notice, this list of conditions and the following disclaimer in the
995 * documentation and/or other materials provided with the distribution.
997 * 3. <BSD Advertising Clause omitted per the July 22, 1999 licensing change
998 * ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change>
1000 * 4. Neither the name of the University nor the names of its contributors
1001 * may be used to endorse or promote products derived from this software
1002 * without specific prior written permission.
1004 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ''AS IS'' AND
1005 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
1006 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
1007 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
1008 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
1009 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
1010 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
1011 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
1012 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
1013 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF