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>
29 #include <netinet/ip_icmp.h>
33 /* should be in netinet/ip_icmp.h */
34 # define ICMP_DEST_UNREACH 3 /* Destination Unreachable */
35 # define ICMP_SOURCE_QUENCH 4 /* Source Quench */
36 # define ICMP_REDIRECT 5 /* Redirect (change route) */
37 # define ICMP_ECHO 8 /* Echo Request */
38 # define ICMP_TIME_EXCEEDED 11 /* Time Exceeded */
39 # define ICMP_PARAMETERPROB 12 /* Parameter Problem */
40 # define ICMP_TIMESTAMP 13 /* Timestamp Request */
41 # define ICMP_TIMESTAMPREPLY 14 /* Timestamp Reply */
42 # define ICMP_INFO_REQUEST 15 /* Information Request */
43 # define ICMP_INFO_REPLY 16 /* Information Reply */
44 # define ICMP_ADDRESS 17 /* Address Mask Request */
45 # define ICMP_ADDRESSREPLY 18 /* Address Mask Reply */
51 //config: select PLATFORM_LINUX
53 //config: ping uses the ICMP protocol's mandatory ECHO_REQUEST datagram to
54 //config: elicit an ICMP ECHO_RESPONSE from a host or gateway.
57 //config: bool "ping6"
59 //config: depends on FEATURE_IPV6 && PING
61 //config: This will give you a ping that can talk IPv6.
63 //config:config FEATURE_FANCY_PING
64 //config: bool "Enable fancy ping output"
66 //config: depends on PING
68 //config: Make the output from the ping applet include statistics, and at the
69 //config: same time provide full support for ICMP packets.
71 /* Needs socket(AF_INET, SOCK_RAW, IPPROTO_ICMP), therefore BB_SUID_MAYBE: */
72 //applet:IF_PING(APPLET(ping, BB_DIR_BIN, BB_SUID_MAYBE))
73 //applet:IF_PING6(APPLET(ping6, BB_DIR_BIN, BB_SUID_MAYBE))
75 //kbuild:lib-$(CONFIG_PING) += ping.o
76 //kbuild:lib-$(CONFIG_PING6) += ping.o
78 //usage:#if !ENABLE_FEATURE_FANCY_PING
79 //usage:# define ping_trivial_usage
81 //usage:# define ping_full_usage "\n\n"
82 //usage: "Send ICMP ECHO_REQUEST packets to network hosts"
83 //usage:# define ping6_trivial_usage
85 //usage:# define ping6_full_usage "\n\n"
86 //usage: "Send ICMP ECHO_REQUEST packets to network hosts"
88 //usage:# define ping_trivial_usage
89 //usage: "[OPTIONS] HOST"
90 //usage:# define ping_full_usage "\n\n"
91 //usage: "Send ICMP ECHO_REQUEST packets to network hosts\n"
93 //usage: "\n -4,-6 Force IP or IPv6 name resolution"
95 //usage: "\n -c CNT Send only CNT pings"
96 //usage: "\n -s SIZE Send SIZE data bytes in packets (default:56)"
97 //usage: "\n -t TTL Set TTL"
98 //usage: "\n -I IFACE/IP Use interface or IP address as source"
99 //usage: "\n -W SEC Seconds to wait for the first response (default:10)"
100 //usage: "\n (after all -c CNT packets are sent)"
101 //usage: "\n -w SEC Seconds until ping exits (default:infinite)"
102 //usage: "\n (can exit earlier with -c CNT)"
103 //usage: "\n -q Quiet, only displays output at start"
104 //usage: "\n and when finished"
106 //usage:# define ping6_trivial_usage
107 //usage: "[OPTIONS] HOST"
108 //usage:# define ping6_full_usage "\n\n"
109 //usage: "Send ICMP ECHO_REQUEST packets to network hosts\n"
110 //usage: "\n -c CNT Send only CNT pings"
111 //usage: "\n -s SIZE Send SIZE data bytes in packets (default:56)"
112 //usage: "\n -I IFACE/IP Use interface or IP address as source"
113 //usage: "\n -q Quiet, only displays output at start"
114 //usage: "\n and when finished"
118 //usage:#define ping_example_usage
119 //usage: "$ ping localhost\n"
120 //usage: "PING slag (127.0.0.1): 56 data bytes\n"
121 //usage: "64 bytes from 127.0.0.1: icmp_seq=0 ttl=255 time=20.1 ms\n"
123 //usage: "--- debian ping statistics ---\n"
124 //usage: "1 packets transmitted, 1 packets received, 0% packet loss\n"
125 //usage: "round-trip min/avg/max = 20.1/20.1/20.1 ms\n"
126 //usage:#define ping6_example_usage
127 //usage: "$ ping6 ip6-localhost\n"
128 //usage: "PING ip6-localhost (::1): 56 data bytes\n"
129 //usage: "64 bytes from ::1: icmp6_seq=0 ttl=64 time=20.1 ms\n"
131 //usage: "--- ip6-localhost ping statistics ---\n"
132 //usage: "1 packets transmitted, 1 packets received, 0% packet loss\n"
133 //usage: "round-trip min/avg/max = 20.1/20.1/20.1 ms\n"
136 # include <netinet/icmp6.h>
137 /* I see RENUMBERED constants in bits/in.h - !!?
138 * What a fuck is going on with libc? Is it a glibc joke? */
139 # ifdef IPV6_2292HOPLIMIT
140 # undef IPV6_HOPLIMIT
141 # define IPV6_HOPLIMIT IPV6_2292HOPLIMIT
149 MAX_DUP_CHK = (8 * 128),
151 PINGINTERVAL = 1, /* 1 second */
157 create_icmp_socket(len_and_sockaddr *lsa)
159 create_icmp_socket(void)
160 #define create_icmp_socket(lsa) create_icmp_socket()
165 if (lsa->u.sa.sa_family == AF_INET6)
166 sock = socket(AF_INET6, SOCK_RAW, IPPROTO_ICMPV6);
169 sock = socket(AF_INET, SOCK_RAW, 1); /* 1 == ICMP */
172 bb_error_msg_and_die(bb_msg_perm_denied_are_you_root);
173 bb_perror_msg_and_die(bb_msg_can_not_create_raw_socket);
176 xmove_fd(sock, pingsock);
179 #if !ENABLE_FEATURE_FANCY_PING
185 char packet[DEFDATALEN + MAXIPLEN + MAXICMPLEN];
187 #define G (*(struct globals*)&bb_common_bufsiz1)
188 #define INIT_G() do { } while (0)
190 static void noresp(int ign UNUSED_PARAM)
192 printf("No response from %s\n", G.hostname);
196 static void ping4(len_and_sockaddr *lsa)
201 pkt = (struct icmp *) G.packet;
202 /*memset(pkt, 0, sizeof(G.packet)); already is */
203 pkt->icmp_type = ICMP_ECHO;
204 pkt->icmp_cksum = inet_cksum((uint16_t *) pkt, sizeof(G.packet));
206 xsendto(pingsock, G.packet, DEFDATALEN + ICMP_MINLEN, &lsa->u.sa, lsa->len);
208 /* listen for replies */
211 struct sockaddr_in from;
212 socklen_t fromlen = sizeof(from);
214 c = recvfrom(pingsock, G.packet, sizeof(G.packet), 0,
215 (struct sockaddr *) &from, &fromlen);
217 c = recv(pingsock, G.packet, sizeof(G.packet), 0);
221 bb_perror_msg("recvfrom");
224 if (c >= 76) { /* ip + icmp */
225 struct iphdr *iphdr = (struct iphdr *) G.packet;
227 pkt = (struct icmp *) (G.packet + (iphdr->ihl << 2)); /* skip ip hdr */
228 if (pkt->icmp_type == ICMP_ECHOREPLY)
232 if (ENABLE_FEATURE_CLEAN_UP)
237 static void ping6(len_and_sockaddr *lsa)
239 struct icmp6_hdr *pkt;
243 pkt = (struct icmp6_hdr *) G.packet;
244 /*memset(pkt, 0, sizeof(G.packet)); already is */
245 pkt->icmp6_type = ICMP6_ECHO_REQUEST;
247 sockopt = offsetof(struct icmp6_hdr, icmp6_cksum);
248 setsockopt(pingsock, SOL_RAW, IPV6_CHECKSUM, &sockopt, sizeof(sockopt));
250 xsendto(pingsock, G.packet, DEFDATALEN + sizeof(struct icmp6_hdr), &lsa->u.sa, lsa->len);
252 /* listen for replies */
255 struct sockaddr_in6 from;
256 socklen_t fromlen = sizeof(from);
258 c = recvfrom(pingsock, G.packet, sizeof(G.packet), 0,
259 (struct sockaddr *) &from, &fromlen);
261 c = recv(pingsock, G.packet, sizeof(G.packet), 0);
265 bb_perror_msg("recvfrom");
268 if (c >= ICMP_MINLEN) { /* icmp6_hdr */
269 if (pkt->icmp6_type == ICMP6_ECHO_REPLY)
273 if (ENABLE_FEATURE_CLEAN_UP)
279 # define common_ping_main(af, argv) common_ping_main(argv)
281 static int common_ping_main(sa_family_t af, char **argv)
283 len_and_sockaddr *lsa;
288 while ((++argv)[0] && argv[0][0] == '-') {
289 if (argv[0][1] == '4') {
293 if (argv[0][1] == '6') {
308 lsa = xhost_and_af2sockaddr(G.hostname, 0, af);
310 lsa = xhost_and_af2sockaddr(G.hostname, 0, AF_INET);
312 /* Set timer _after_ DNS resolution */
313 signal(SIGALRM, noresp);
314 alarm(5); /* give the host 5000ms to respond */
316 create_icmp_socket(lsa);
318 if (lsa->u.sa.sa_family == AF_INET6)
323 printf("%s is alive!\n", G.hostname);
328 #else /* FEATURE_FANCY_PING */
331 /* Full(er) version */
333 #define OPT_STRING ("qvc:s:t:w:W:I:n4" IF_PING6("6"))
336 OPT_VERBOSE = 1 << 1,
343 /*OPT_n = 1 << 8, - ignored */
345 OPT_IPV6 = (1 << 10) * ENABLE_PING6,
352 len_and_sockaddr *source_lsa;
354 unsigned pingcount; /* must be int-sized */
356 unsigned long ntransmitted, nreceived, nrepeats;
358 unsigned tmin, tmax; /* in us */
359 unsigned long long tsum; /* in us, sum of all times */
363 unsigned sizeof_rcv_packet;
364 char *rcv_packet; /* [datalen + MAXIPLEN + MAXICMPLEN] */
365 void *snd_packet; /* [datalen + ipv4/ipv6_const] */
366 const char *hostname;
370 struct sockaddr_in sin;
372 struct sockaddr_in6 sin6;
375 unsigned char rcvd_tbl[MAX_DUP_CHK / 8];
377 #define G (*(struct globals*)&bb_common_bufsiz1)
378 #define if_index (G.if_index )
379 #define source_lsa (G.source_lsa )
380 #define str_I (G.str_I )
381 #define datalen (G.datalen )
382 #define pingcount (G.pingcount )
383 #define opt_ttl (G.opt_ttl )
384 #define myid (G.myid )
385 #define tmin (G.tmin )
386 #define tmax (G.tmax )
387 #define tsum (G.tsum )
388 #define deadline (G.deadline )
389 #define timeout (G.timeout )
390 #define total_secs (G.total_secs )
391 #define hostname (G.hostname )
392 #define dotted (G.dotted )
393 #define pingaddr (G.pingaddr )
394 #define rcvd_tbl (G.rcvd_tbl )
395 void BUG_ping_globals_too_big(void);
396 #define INIT_G() do { \
397 if (sizeof(G) > COMMON_BUFSIZE) \
398 BUG_ping_globals_too_big(); \
399 datalen = DEFDATALEN; \
405 #define BYTE(bit) rcvd_tbl[(bit)>>3]
406 #define MASK(bit) (1 << ((bit) & 7))
407 #define SET(bit) (BYTE(bit) |= MASK(bit))
408 #define CLR(bit) (BYTE(bit) &= (~MASK(bit)))
409 #define TST(bit) (BYTE(bit) & MASK(bit))
411 static void print_stats_and_exit(int junk) NORETURN;
412 static void print_stats_and_exit(int junk UNUSED_PARAM)
417 signal(SIGINT, SIG_IGN);
420 printf("\n--- %s ping statistics ---\n"
421 "%lu packets transmitted, "
422 "%lu packets received, ",
423 hostname, G.ntransmitted, nrecv
426 printf("%lu duplicates, ", G.nrepeats);
429 ul = (ul - nrecv) * 100 / ul;
430 printf("%lu%% packet loss\n", ul);
431 if (tmin != UINT_MAX) {
432 unsigned tavg = tsum / (nrecv + G.nrepeats);
433 printf("round-trip min/avg/max = %u.%03u/%u.%03u/%u.%03u ms\n",
434 tmin / 1000, tmin % 1000,
435 tavg / 1000, tavg % 1000,
436 tmax / 1000, tmax % 1000);
438 /* if condition is true, exit with 1 -- 'failure' */
439 exit(nrecv == 0 || (deadline && nrecv < pingcount));
442 static void sendping_tail(void (*sp)(int), int size_pkt)
446 CLR((uint16_t)G.ntransmitted % MAX_DUP_CHK);
451 /* sizeof(pingaddr) can be larger than real sa size, but I think
452 * it doesn't matter */
453 sz = xsendto(pingsock, G.snd_packet, size_pkt, &pingaddr.sa, sizeof(pingaddr));
455 bb_error_msg_and_die(bb_msg_write_error);
457 if (pingcount == 0 || deadline || G.ntransmitted < pingcount) {
458 /* Didn't send all pings yet - schedule next in 1s */
461 total_secs += PINGINTERVAL;
462 if (total_secs >= deadline)
463 signal(SIGALRM, print_stats_and_exit);
466 } else { /* -c NN, and all NN are sent (and no deadline) */
467 /* Wait for the last ping to come back.
468 * -W timeout: wait for a response in seconds.
469 * Affects only timeout in absense of any responses,
470 * otherwise ping waits for two RTTs. */
471 unsigned expire = timeout;
474 /* approx. 2*tmax, in seconds (2 RTT) */
475 expire = tmax / (512*1024);
479 signal(SIGALRM, print_stats_and_exit);
484 static void sendping4(int junk UNUSED_PARAM)
486 struct icmp *pkt = G.snd_packet;
488 //memset(pkt, 0, datalen + ICMP_MINLEN + 4); - G.snd_packet was xzalloced
489 pkt->icmp_type = ICMP_ECHO;
490 /*pkt->icmp_code = 0;*/
491 pkt->icmp_cksum = 0; /* cksum is calculated with this field set to 0 */
492 pkt->icmp_seq = htons(G.ntransmitted); /* don't ++ here, it can be a macro */
495 /* If datalen < 4, we store timestamp _past_ the packet,
496 * but it's ok - we allocated 4 extra bytes in xzalloc() just in case.
498 /*if (datalen >= 4)*/
499 /* No hton: we'll read it back on the same machine */
500 *(uint32_t*)&pkt->icmp_dun = monotonic_us();
502 pkt->icmp_cksum = inet_cksum((uint16_t *) pkt, datalen + ICMP_MINLEN);
504 sendping_tail(sendping4, ICMP_MINLEN);
507 static void sendping6(int junk UNUSED_PARAM)
509 struct icmp6_hdr *pkt = G.snd_packet;
511 //memset(pkt, 0, datalen + sizeof(struct icmp6_hdr) + 4);
512 pkt->icmp6_type = ICMP6_ECHO_REQUEST;
513 /*pkt->icmp6_code = 0;*/
514 /*pkt->icmp6_cksum = 0;*/
515 pkt->icmp6_seq = htons(G.ntransmitted); /* don't ++ here, it can be a macro */
516 pkt->icmp6_id = myid;
518 /*if (datalen >= 4)*/
519 *(uint32_t*)(&pkt->icmp6_data8[4]) = monotonic_us();
521 //TODO? pkt->icmp_cksum = inet_cksum(...);
523 sendping_tail(sendping6, sizeof(struct icmp6_hdr));
527 static const char *icmp_type_name(int id)
530 case ICMP_ECHOREPLY: return "Echo Reply";
531 case ICMP_DEST_UNREACH: return "Destination Unreachable";
532 case ICMP_SOURCE_QUENCH: return "Source Quench";
533 case ICMP_REDIRECT: return "Redirect (change route)";
534 case ICMP_ECHO: return "Echo Request";
535 case ICMP_TIME_EXCEEDED: return "Time Exceeded";
536 case ICMP_PARAMETERPROB: return "Parameter Problem";
537 case ICMP_TIMESTAMP: return "Timestamp Request";
538 case ICMP_TIMESTAMPREPLY: return "Timestamp Reply";
539 case ICMP_INFO_REQUEST: return "Information Request";
540 case ICMP_INFO_REPLY: return "Information Reply";
541 case ICMP_ADDRESS: return "Address Mask Request";
542 case ICMP_ADDRESSREPLY: return "Address Mask Reply";
543 default: return "unknown ICMP type";
547 /* RFC3542 changed some definitions from RFC2292 for no good reason, whee!
548 * the newer 3542 uses a MLD_ prefix where as 2292 uses ICMP6_ prefix */
549 #ifndef MLD_LISTENER_QUERY
550 # define MLD_LISTENER_QUERY ICMP6_MEMBERSHIP_QUERY
552 #ifndef MLD_LISTENER_REPORT
553 # define MLD_LISTENER_REPORT ICMP6_MEMBERSHIP_REPORT
555 #ifndef MLD_LISTENER_REDUCTION
556 # define MLD_LISTENER_REDUCTION ICMP6_MEMBERSHIP_REDUCTION
558 static const char *icmp6_type_name(int id)
561 case ICMP6_DST_UNREACH: return "Destination Unreachable";
562 case ICMP6_PACKET_TOO_BIG: return "Packet too big";
563 case ICMP6_TIME_EXCEEDED: return "Time Exceeded";
564 case ICMP6_PARAM_PROB: return "Parameter Problem";
565 case ICMP6_ECHO_REPLY: return "Echo Reply";
566 case ICMP6_ECHO_REQUEST: return "Echo Request";
567 case MLD_LISTENER_QUERY: return "Listener Query";
568 case MLD_LISTENER_REPORT: return "Listener Report";
569 case MLD_LISTENER_REDUCTION: return "Listener Reduction";
570 default: return "unknown ICMP type";
575 static void unpack_tail(int sz, uint32_t *tp,
576 const char *from_str,
577 uint16_t recv_seq, int ttl)
580 const char *dupmsg = " (DUP!)";
581 unsigned triptime = triptime; /* for gcc */
584 /* (int32_t) cast is for hypothetical 64-bit unsigned */
585 /* (doesn't hurt 32-bit real-world anyway) */
586 triptime = (int32_t) ((uint32_t)monotonic_us() - *tp);
594 b = &BYTE(recv_seq % MAX_DUP_CHK);
595 m = MASK(recv_seq % MAX_DUP_CHK);
596 /*if TST(recv_seq % MAX_DUP_CHK):*/
600 /*SET(recv_seq % MAX_DUP_CHK):*/
606 if (option_mask32 & OPT_QUIET)
609 printf("%d bytes from %s: seq=%u ttl=%d", sz,
610 from_str, recv_seq, ttl);
612 printf(" time=%u.%03u ms", triptime / 1000, triptime % 1000);
616 static void unpack4(char *buf, int sz, struct sockaddr_in *from)
618 struct icmp *icmppkt;
622 /* discard if too short */
623 if (sz < (datalen + ICMP_MINLEN))
626 /* check IP header */
627 iphdr = (struct iphdr *) buf;
628 hlen = iphdr->ihl << 2;
630 icmppkt = (struct icmp *) (buf + hlen);
631 if (icmppkt->icmp_id != myid)
632 return; /* not our ping */
634 if (icmppkt->icmp_type == ICMP_ECHOREPLY) {
635 uint16_t recv_seq = ntohs(icmppkt->icmp_seq);
638 if (sz >= ICMP_MINLEN + sizeof(uint32_t))
639 tp = (uint32_t *) icmppkt->icmp_data;
641 inet_ntoa(*(struct in_addr *) &from->sin_addr.s_addr),
642 recv_seq, iphdr->ttl);
643 } else if (icmppkt->icmp_type != ICMP_ECHO) {
644 bb_error_msg("warning: got ICMP %d (%s)",
646 icmp_type_name(icmppkt->icmp_type));
650 static void unpack6(char *packet, int sz, struct sockaddr_in6 *from, int hoplimit)
652 struct icmp6_hdr *icmppkt;
653 char buf[INET6_ADDRSTRLEN];
655 /* discard if too short */
656 if (sz < (datalen + sizeof(struct icmp6_hdr)))
659 icmppkt = (struct icmp6_hdr *) packet;
660 if (icmppkt->icmp6_id != myid)
661 return; /* not our ping */
663 if (icmppkt->icmp6_type == ICMP6_ECHO_REPLY) {
664 uint16_t recv_seq = ntohs(icmppkt->icmp6_seq);
667 if (sz >= sizeof(struct icmp6_hdr) + sizeof(uint32_t))
668 tp = (uint32_t *) &icmppkt->icmp6_data8[4];
670 inet_ntop(AF_INET6, &from->sin6_addr,
673 } else if (icmppkt->icmp6_type != ICMP6_ECHO_REQUEST) {
674 bb_error_msg("warning: got ICMP %d (%s)",
676 icmp6_type_name(icmppkt->icmp6_type));
681 static void ping4(len_and_sockaddr *lsa)
685 pingaddr.sin = lsa->u.sin;
687 if (setsockopt(pingsock, IPPROTO_IP, IP_MULTICAST_IF,
688 &source_lsa->u.sa, source_lsa->len))
689 bb_error_msg_and_die("can't set multicast source interface");
690 xbind(pingsock, &source_lsa->u.sa, source_lsa->len);
693 /* enable broadcast pings */
694 setsockopt_broadcast(pingsock);
696 /* set recv buf (needed if we can get lots of responses: flood ping,
697 * broadcast ping etc) */
698 sockopt = (datalen * 2) + 7 * 1024; /* giving it a bit of extra room */
699 setsockopt(pingsock, SOL_SOCKET, SO_RCVBUF, &sockopt, sizeof(sockopt));
702 setsockopt(pingsock, IPPROTO_IP, IP_TTL, &opt_ttl, sizeof(opt_ttl));
703 /* above doesnt affect packets sent to bcast IP, so... */
704 setsockopt(pingsock, IPPROTO_IP, IP_MULTICAST_TTL, &opt_ttl, sizeof(opt_ttl));
707 signal(SIGINT, print_stats_and_exit);
709 /* start the ping's going ... */
712 /* listen for replies */
714 struct sockaddr_in from;
715 socklen_t fromlen = (socklen_t) sizeof(from);
718 c = recvfrom(pingsock, G.rcv_packet, G.sizeof_rcv_packet, 0,
719 (struct sockaddr *) &from, &fromlen);
722 bb_perror_msg("recvfrom");
725 unpack4(G.rcv_packet, c, &from);
726 if (pingcount && G.nreceived >= pingcount)
731 extern int BUG_bad_offsetof_icmp6_cksum(void);
732 static void ping6(len_and_sockaddr *lsa)
736 struct sockaddr_in6 from;
738 char control_buf[CMSG_SPACE(36)];
740 pingaddr.sin6 = lsa->u.sin6;
742 xbind(pingsock, &source_lsa->u.sa, source_lsa->len);
746 struct icmp6_filter filt;
747 if (!(option_mask32 & OPT_VERBOSE)) {
748 ICMP6_FILTER_SETBLOCKALL(&filt);
749 ICMP6_FILTER_SETPASS(ICMP6_ECHO_REPLY, &filt);
751 ICMP6_FILTER_SETPASSALL(&filt);
753 if (setsockopt(pingsock, IPPROTO_ICMPV6, ICMP6_FILTER, &filt,
755 bb_error_msg_and_die("setsockopt(ICMP6_FILTER)");
757 #endif /*ICMP6_FILTER*/
759 /* enable broadcast pings */
760 setsockopt_broadcast(pingsock);
762 /* set recv buf (needed if we can get lots of responses: flood ping,
763 * broadcast ping etc) */
764 sockopt = (datalen * 2) + 7 * 1024; /* giving it a bit of extra room */
765 setsockopt(pingsock, SOL_SOCKET, SO_RCVBUF, &sockopt, sizeof(sockopt));
767 sockopt = offsetof(struct icmp6_hdr, icmp6_cksum);
768 if (offsetof(struct icmp6_hdr, icmp6_cksum) != 2)
769 BUG_bad_offsetof_icmp6_cksum();
770 setsockopt(pingsock, SOL_RAW, IPV6_CHECKSUM, &sockopt, sizeof(sockopt));
772 /* request ttl info to be returned in ancillary data */
773 setsockopt(pingsock, SOL_IPV6, IPV6_HOPLIMIT, &const_int_1, sizeof(const_int_1));
776 pingaddr.sin6.sin6_scope_id = if_index;
778 signal(SIGINT, print_stats_and_exit);
780 /* start the ping's going ... */
783 /* listen for replies */
784 msg.msg_name = &from;
785 msg.msg_namelen = sizeof(from);
788 msg.msg_control = control_buf;
789 iov.iov_base = G.rcv_packet;
790 iov.iov_len = G.sizeof_rcv_packet;
795 msg.msg_controllen = sizeof(control_buf);
797 c = recvmsg(pingsock, &msg, 0);
800 bb_perror_msg("recvfrom");
803 for (mp = CMSG_FIRSTHDR(&msg); mp; mp = CMSG_NXTHDR(&msg, mp)) {
804 if (mp->cmsg_level == SOL_IPV6
805 && mp->cmsg_type == IPV6_HOPLIMIT
806 /* don't check len - we trust the kernel: */
807 /* && mp->cmsg_len >= CMSG_LEN(sizeof(int)) */
809 /*hoplimit = *(int*)CMSG_DATA(mp); - unaligned access */
810 move_from_unaligned_int(hoplimit, CMSG_DATA(mp));
813 unpack6(G.rcv_packet, c, &from, hoplimit);
814 if (pingcount && G.nreceived >= pingcount)
820 static void ping(len_and_sockaddr *lsa)
822 printf("PING %s (%s)", hostname, dotted);
825 xmalloc_sockaddr2dotted_noport(&source_lsa->u.sa));
827 printf(": %d data bytes\n", datalen);
829 create_icmp_socket(lsa);
830 /* untested whether "-I addr" really works for IPv6: */
832 setsockopt_bindtodevice(pingsock, str_I);
834 G.sizeof_rcv_packet = datalen + MAXIPLEN + MAXICMPLEN;
835 G.rcv_packet = xzalloc(G.sizeof_rcv_packet);
837 if (lsa->u.sa.sa_family == AF_INET6) {
838 /* +4 reserves a place for timestamp, which may end up sitting
839 * _after_ packet. Saves one if() - see sendping4/6() */
840 G.snd_packet = xzalloc(datalen + sizeof(struct icmp6_hdr) + 4);
845 G.snd_packet = xzalloc(datalen + ICMP_MINLEN + 4);
850 static int common_ping_main(int opt, char **argv)
852 len_and_sockaddr *lsa;
857 /* exactly one argument needed; -v and -q don't mix; -c NUM, -t NUM, -w NUM, -W NUM */
858 opt_complementary = "=1:q--v:v--q:c+:t+:w+:W+";
859 opt |= getopt32(argv, OPT_STRING, &pingcount, &str_s, &opt_ttl, &deadline, &timeout, &str_I);
861 datalen = xatou16(str_s); // -s
862 if (opt & OPT_I) { // -I
863 if_index = if_nametoindex(str_I);
865 /* TODO: I'm not sure it takes IPv6 unless in [XX:XX..] format */
866 source_lsa = xdotted2sockaddr(str_I, 0);
867 str_I = NULL; /* don't try to bind to device later */
870 myid = (uint16_t) getpid();
871 hostname = argv[optind];
874 sa_family_t af = AF_UNSPEC;
879 lsa = xhost_and_af2sockaddr(hostname, 0, af);
882 lsa = xhost_and_af2sockaddr(hostname, 0, AF_INET);
885 if (source_lsa && source_lsa->u.sa.sa_family != lsa->u.sa.sa_family)
886 /* leaking it here... */
889 dotted = xmalloc_sockaddr2dotted_noport(&lsa->u.sa);
891 print_stats_and_exit(EXIT_SUCCESS);
892 /*return EXIT_SUCCESS;*/
894 #endif /* FEATURE_FANCY_PING */
897 int ping_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
898 int ping_main(int argc UNUSED_PARAM, char **argv)
900 #if !ENABLE_FEATURE_FANCY_PING
901 return common_ping_main(AF_UNSPEC, argv);
903 return common_ping_main(0, argv);
908 int ping6_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
909 int ping6_main(int argc UNUSED_PARAM, char **argv)
911 # if !ENABLE_FEATURE_FANCY_PING
912 return common_ping_main(AF_INET6, argv);
914 return common_ping_main(OPT_IPV6, argv);
920 * Copyright (c) 1989 The Regents of the University of California.
921 * All rights reserved.
923 * This code is derived from software contributed to Berkeley by
926 * Redistribution and use in source and binary forms, with or without
927 * modification, are permitted provided that the following conditions
929 * 1. Redistributions of source code must retain the above copyright
930 * notice, this list of conditions and the following disclaimer.
931 * 2. Redistributions in binary form must reproduce the above copyright
932 * notice, this list of conditions and the following disclaimer in the
933 * documentation and/or other materials provided with the distribution.
935 * 3. <BSD Advertising Clause omitted per the July 22, 1999 licensing change
936 * ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change>
938 * 4. Neither the name of the University nor the names of its contributors
939 * may be used to endorse or promote products derived from this software
940 * without specific prior written permission.
942 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
943 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
944 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
945 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
946 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
947 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
948 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
949 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
950 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
951 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF