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"
92 //usage: "\n -4,-6 Force IP or IPv6 name resolution"
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 -t TTL Set TTL"
96 //usage: "\n -I IFACE/IP Use interface or IP address as source"
97 //usage: "\n -W SEC Seconds to wait for the first response (default:10)"
98 //usage: "\n (after all -c CNT packets are sent)"
99 //usage: "\n -w SEC Seconds until ping exits (default:infinite)"
100 //usage: "\n (can exit earlier with -c CNT)"
101 //usage: "\n -q Quiet, only displays output at start"
102 //usage: "\n and when finished"
104 //usage:# define ping6_trivial_usage
105 //usage: "[OPTIONS] HOST"
106 //usage:# define ping6_full_usage "\n\n"
107 //usage: "Send ICMP ECHO_REQUEST packets to network hosts\n"
108 //usage: "\n -c CNT Send only CNT pings"
109 //usage: "\n -s SIZE Send SIZE data bytes in packets (default:56)"
110 //usage: "\n -I IFACE/IP Use interface or IP address as source"
111 //usage: "\n -q Quiet, only displays output at start"
112 //usage: "\n and when finished"
116 //usage:#define ping_example_usage
117 //usage: "$ ping localhost\n"
118 //usage: "PING slag (127.0.0.1): 56 data bytes\n"
119 //usage: "64 bytes from 127.0.0.1: icmp_seq=0 ttl=255 time=20.1 ms\n"
121 //usage: "--- debian ping statistics ---\n"
122 //usage: "1 packets transmitted, 1 packets received, 0% packet loss\n"
123 //usage: "round-trip min/avg/max = 20.1/20.1/20.1 ms\n"
124 //usage:#define ping6_example_usage
125 //usage: "$ ping6 ip6-localhost\n"
126 //usage: "PING ip6-localhost (::1): 56 data bytes\n"
127 //usage: "64 bytes from ::1: icmp6_seq=0 ttl=64 time=20.1 ms\n"
129 //usage: "--- ip6-localhost ping statistics ---\n"
130 //usage: "1 packets transmitted, 1 packets received, 0% packet loss\n"
131 //usage: "round-trip min/avg/max = 20.1/20.1/20.1 ms\n"
134 # include <netinet/icmp6.h>
135 /* I see RENUMBERED constants in bits/in.h - !!?
136 * What a fuck is going on with libc? Is it a glibc joke? */
137 # ifdef IPV6_2292HOPLIMIT
138 # undef IPV6_HOPLIMIT
139 # define IPV6_HOPLIMIT IPV6_2292HOPLIMIT
147 MAX_DUP_CHK = (8 * 128),
149 PINGINTERVAL = 1, /* 1 second */
152 /* Common routines */
154 static int in_cksum(unsigned short *buf, int sz)
158 unsigned short *w = buf;
159 unsigned short ans = 0;
167 *(unsigned char *) (&ans) = *(unsigned char *) w;
171 sum = (sum >> 16) + (sum & 0xFFFF);
177 #if !ENABLE_FEATURE_FANCY_PING
183 char packet[DEFDATALEN + MAXIPLEN + MAXICMPLEN];
185 #define G (*(struct globals*)&bb_common_bufsiz1)
186 #define INIT_G() do { } while (0)
188 static void noresp(int ign UNUSED_PARAM)
190 printf("No response from %s\n", G.hostname);
194 static void ping4(len_and_sockaddr *lsa)
199 pingsock = create_icmp_socket();
201 pkt = (struct icmp *) G.packet;
202 memset(pkt, 0, sizeof(G.packet));
203 pkt->icmp_type = ICMP_ECHO;
204 pkt->icmp_cksum = in_cksum((unsigned short *) pkt, sizeof(G.packet));
206 xsendto(pingsock, G.packet, DEFDATALEN + ICMP_MINLEN, &lsa->u.sa, lsa->len);
208 /* listen for replies */
210 struct sockaddr_in from;
211 socklen_t fromlen = sizeof(from);
213 c = recvfrom(pingsock, G.packet, sizeof(G.packet), 0,
214 (struct sockaddr *) &from, &fromlen);
217 bb_perror_msg("recvfrom");
220 if (c >= 76) { /* ip + icmp */
221 struct iphdr *iphdr = (struct iphdr *) G.packet;
223 pkt = (struct icmp *) (G.packet + (iphdr->ihl << 2)); /* skip ip hdr */
224 if (pkt->icmp_type == ICMP_ECHOREPLY)
228 if (ENABLE_FEATURE_CLEAN_UP)
233 static void ping6(len_and_sockaddr *lsa)
235 struct icmp6_hdr *pkt;
239 pingsock = create_icmp6_socket();
241 pkt = (struct icmp6_hdr *) G.packet;
242 memset(pkt, 0, sizeof(G.packet));
243 pkt->icmp6_type = ICMP6_ECHO_REQUEST;
245 sockopt = offsetof(struct icmp6_hdr, icmp6_cksum);
246 setsockopt(pingsock, SOL_RAW, IPV6_CHECKSUM, &sockopt, sizeof(sockopt));
248 xsendto(pingsock, G.packet, DEFDATALEN + sizeof(struct icmp6_hdr), &lsa->u.sa, lsa->len);
250 /* listen for replies */
252 struct sockaddr_in6 from;
253 socklen_t fromlen = sizeof(from);
255 c = recvfrom(pingsock, G.packet, sizeof(G.packet), 0,
256 (struct sockaddr *) &from, &fromlen);
259 bb_perror_msg("recvfrom");
262 if (c >= ICMP_MINLEN) { /* icmp6_hdr */
263 pkt = (struct icmp6_hdr *) G.packet;
264 if (pkt->icmp6_type == ICMP6_ECHO_REPLY)
268 if (ENABLE_FEATURE_CLEAN_UP)
274 # define common_ping_main(af, argv) common_ping_main(argv)
276 static int common_ping_main(sa_family_t af, char **argv)
278 len_and_sockaddr *lsa;
283 while ((++argv)[0] && argv[0][0] == '-') {
284 if (argv[0][1] == '4') {
288 if (argv[0][1] == '6') {
303 lsa = xhost_and_af2sockaddr(G.hostname, 0, af);
305 lsa = xhost_and_af2sockaddr(G.hostname, 0, AF_INET);
307 /* Set timer _after_ DNS resolution */
308 signal(SIGALRM, noresp);
309 alarm(5); /* give the host 5000ms to respond */
312 if (lsa->u.sa.sa_family == AF_INET6)
317 printf("%s is alive!\n", G.hostname);
322 #else /* FEATURE_FANCY_PING */
325 /* Full(er) version */
327 #define OPT_STRING ("qvc:s:t:w:W:I:4" IF_PING6("6"))
330 OPT_VERBOSE = 1 << 1,
338 OPT_IPV6 = (1 << 9) * ENABLE_PING6,
346 len_and_sockaddr *source_lsa;
348 unsigned pingcount; /* must be int-sized */
350 unsigned long ntransmitted, nreceived, nrepeats;
352 unsigned tmin, tmax; /* in us */
353 unsigned long long tsum; /* in us, sum of all times */
357 unsigned sizeof_rcv_packet;
358 char *rcv_packet; /* [datalen + MAXIPLEN + MAXICMPLEN] */
359 void *snd_packet; /* [datalen + ipv4/ipv6_const] */
360 const char *hostname;
364 struct sockaddr_in sin;
366 struct sockaddr_in6 sin6;
369 char rcvd_tbl[MAX_DUP_CHK / 8];
371 #define G (*(struct globals*)&bb_common_bufsiz1)
372 #define pingsock (G.pingsock )
373 #define if_index (G.if_index )
374 #define source_lsa (G.source_lsa )
375 #define str_I (G.str_I )
376 #define datalen (G.datalen )
377 #define ntransmitted (G.ntransmitted)
378 #define nreceived (G.nreceived )
379 #define nrepeats (G.nrepeats )
380 #define pingcount (G.pingcount )
381 #define opt_ttl (G.opt_ttl )
382 #define myid (G.myid )
383 #define tmin (G.tmin )
384 #define tmax (G.tmax )
385 #define tsum (G.tsum )
386 #define deadline (G.deadline )
387 #define timeout (G.timeout )
388 #define total_secs (G.total_secs )
389 #define hostname (G.hostname )
390 #define dotted (G.dotted )
391 #define pingaddr (G.pingaddr )
392 #define rcvd_tbl (G.rcvd_tbl )
393 void BUG_ping_globals_too_big(void);
394 #define INIT_G() do { \
395 if (sizeof(G) > COMMON_BUFSIZE) \
396 BUG_ping_globals_too_big(); \
398 datalen = DEFDATALEN; \
404 #define A(bit) rcvd_tbl[(bit)>>3] /* identify byte in array */
405 #define B(bit) (1 << ((bit) & 0x07)) /* identify bit in byte */
406 #define SET(bit) (A(bit) |= B(bit))
407 #define CLR(bit) (A(bit) &= (~B(bit)))
408 #define TST(bit) (A(bit) & B(bit))
410 /**************************************************************************/
412 static void print_stats_and_exit(int junk) NORETURN;
413 static void print_stats_and_exit(int junk UNUSED_PARAM)
415 signal(SIGINT, SIG_IGN);
417 printf("\n--- %s ping statistics ---\n", hostname);
418 printf("%lu packets transmitted, ", ntransmitted);
419 printf("%lu packets received, ", nreceived);
421 printf("%lu duplicates, ", nrepeats);
423 ntransmitted = (ntransmitted - nreceived) * 100 / ntransmitted;
424 printf("%lu%% packet loss\n", ntransmitted);
425 if (tmin != UINT_MAX) {
426 unsigned tavg = tsum / (nreceived + nrepeats);
427 printf("round-trip min/avg/max = %u.%03u/%u.%03u/%u.%03u ms\n",
428 tmin / 1000, tmin % 1000,
429 tavg / 1000, tavg % 1000,
430 tmax / 1000, tmax % 1000);
432 /* if condition is true, exit with 1 -- 'failure' */
433 exit(nreceived == 0 || (deadline && nreceived < pingcount));
436 static void sendping_tail(void (*sp)(int), int size_pkt)
440 CLR((uint16_t)ntransmitted % MAX_DUP_CHK);
445 /* sizeof(pingaddr) can be larger than real sa size, but I think
446 * it doesn't matter */
447 sz = xsendto(pingsock, G.snd_packet, size_pkt, &pingaddr.sa, sizeof(pingaddr));
449 bb_error_msg_and_die(bb_msg_write_error);
451 if (pingcount == 0 || deadline || ntransmitted < pingcount) {
452 /* Didn't send all pings yet - schedule next in 1s */
455 total_secs += PINGINTERVAL;
456 if (total_secs >= deadline)
457 signal(SIGALRM, print_stats_and_exit);
460 } else { /* -c NN, and all NN are sent (and no deadline) */
461 /* Wait for the last ping to come back.
462 * -W timeout: wait for a response in seconds.
463 * Affects only timeout in absense of any responses,
464 * otherwise ping waits for two RTTs. */
465 unsigned expire = timeout;
468 /* approx. 2*tmax, in seconds (2 RTT) */
469 expire = tmax / (512*1024);
473 signal(SIGALRM, print_stats_and_exit);
478 static void sendping4(int junk UNUSED_PARAM)
480 struct icmp *pkt = G.snd_packet;
482 //memset(pkt, 0, datalen + ICMP_MINLEN + 4); - G.snd_packet was xzalloced
483 pkt->icmp_type = ICMP_ECHO;
484 /*pkt->icmp_code = 0;*/
485 pkt->icmp_cksum = 0; /* cksum is calculated with this field set to 0 */
486 pkt->icmp_seq = htons(ntransmitted); /* don't ++ here, it can be a macro */
489 /* If datalen < 4, we store timestamp _past_ the packet,
490 * but it's ok - we allocated 4 extra bytes in xzalloc() just in case.
492 /*if (datalen >= 4)*/
493 /* No hton: we'll read it back on the same machine */
494 *(uint32_t*)&pkt->icmp_dun = monotonic_us();
496 pkt->icmp_cksum = in_cksum((unsigned short *) pkt, datalen + ICMP_MINLEN);
498 sendping_tail(sendping4, ICMP_MINLEN);
501 static void sendping6(int junk UNUSED_PARAM)
503 struct icmp6_hdr *pkt = G.snd_packet;
505 //memset(pkt, 0, datalen + sizeof(struct icmp6_hdr) + 4);
506 pkt->icmp6_type = ICMP6_ECHO_REQUEST;
507 /*pkt->icmp6_code = 0;*/
508 /*pkt->icmp6_cksum = 0;*/
509 pkt->icmp6_seq = htons(ntransmitted); /* don't ++ here, it can be a macro */
510 pkt->icmp6_id = myid;
512 /*if (datalen >= 4)*/
513 *(uint32_t*)(&pkt->icmp6_data8[4]) = monotonic_us();
515 //TODO? pkt->icmp_cksum = in_cksum(...);
517 sendping_tail(sendping6, sizeof(struct icmp6_hdr));
521 static const char *icmp_type_name(int id)
524 case ICMP_ECHOREPLY: return "Echo Reply";
525 case ICMP_DEST_UNREACH: return "Destination Unreachable";
526 case ICMP_SOURCE_QUENCH: return "Source Quench";
527 case ICMP_REDIRECT: return "Redirect (change route)";
528 case ICMP_ECHO: return "Echo Request";
529 case ICMP_TIME_EXCEEDED: return "Time Exceeded";
530 case ICMP_PARAMETERPROB: return "Parameter Problem";
531 case ICMP_TIMESTAMP: return "Timestamp Request";
532 case ICMP_TIMESTAMPREPLY: return "Timestamp Reply";
533 case ICMP_INFO_REQUEST: return "Information Request";
534 case ICMP_INFO_REPLY: return "Information Reply";
535 case ICMP_ADDRESS: return "Address Mask Request";
536 case ICMP_ADDRESSREPLY: return "Address Mask Reply";
537 default: return "unknown ICMP type";
541 /* RFC3542 changed some definitions from RFC2292 for no good reason, whee!
542 * the newer 3542 uses a MLD_ prefix where as 2292 uses ICMP6_ prefix */
543 #ifndef MLD_LISTENER_QUERY
544 # define MLD_LISTENER_QUERY ICMP6_MEMBERSHIP_QUERY
546 #ifndef MLD_LISTENER_REPORT
547 # define MLD_LISTENER_REPORT ICMP6_MEMBERSHIP_REPORT
549 #ifndef MLD_LISTENER_REDUCTION
550 # define MLD_LISTENER_REDUCTION ICMP6_MEMBERSHIP_REDUCTION
552 static const char *icmp6_type_name(int id)
555 case ICMP6_DST_UNREACH: return "Destination Unreachable";
556 case ICMP6_PACKET_TOO_BIG: return "Packet too big";
557 case ICMP6_TIME_EXCEEDED: return "Time Exceeded";
558 case ICMP6_PARAM_PROB: return "Parameter Problem";
559 case ICMP6_ECHO_REPLY: return "Echo Reply";
560 case ICMP6_ECHO_REQUEST: return "Echo Request";
561 case MLD_LISTENER_QUERY: return "Listener Query";
562 case MLD_LISTENER_REPORT: return "Listener Report";
563 case MLD_LISTENER_REDUCTION: return "Listener Reduction";
564 default: return "unknown ICMP type";
569 static void unpack_tail(int sz, uint32_t *tp,
570 const char *from_str,
571 uint16_t recv_seq, int ttl)
573 const char *dupmsg = " (DUP!)";
574 unsigned triptime = triptime; /* for gcc */
579 /* (int32_t) cast is for hypothetical 64-bit unsigned */
580 /* (doesn't hurt 32-bit real-world anyway) */
581 triptime = (int32_t) ((uint32_t)monotonic_us() - *tp);
589 if (TST(recv_seq % MAX_DUP_CHK)) {
593 SET(recv_seq % MAX_DUP_CHK);
597 if (option_mask32 & OPT_QUIET)
600 printf("%d bytes from %s: seq=%u ttl=%d", sz,
601 from_str, recv_seq, ttl);
603 printf(" time=%u.%03u ms", triptime / 1000, triptime % 1000);
607 static void unpack4(char *buf, int sz, struct sockaddr_in *from)
609 struct icmp *icmppkt;
613 /* discard if too short */
614 if (sz < (datalen + ICMP_MINLEN))
617 /* check IP header */
618 iphdr = (struct iphdr *) buf;
619 hlen = iphdr->ihl << 2;
621 icmppkt = (struct icmp *) (buf + hlen);
622 if (icmppkt->icmp_id != myid)
623 return; /* not our ping */
625 if (icmppkt->icmp_type == ICMP_ECHOREPLY) {
626 uint16_t recv_seq = ntohs(icmppkt->icmp_seq);
629 if (sz >= ICMP_MINLEN + sizeof(uint32_t))
630 tp = (uint32_t *) icmppkt->icmp_data;
632 inet_ntoa(*(struct in_addr *) &from->sin_addr.s_addr),
633 recv_seq, iphdr->ttl);
634 } else if (icmppkt->icmp_type != ICMP_ECHO) {
635 bb_error_msg("warning: got ICMP %d (%s)",
637 icmp_type_name(icmppkt->icmp_type));
641 static void unpack6(char *packet, int sz, /*struct sockaddr_in6 *from,*/ int hoplimit)
643 struct icmp6_hdr *icmppkt;
644 char buf[INET6_ADDRSTRLEN];
646 /* discard if too short */
647 if (sz < (datalen + sizeof(struct icmp6_hdr)))
650 icmppkt = (struct icmp6_hdr *) packet;
651 if (icmppkt->icmp6_id != myid)
652 return; /* not our ping */
654 if (icmppkt->icmp6_type == ICMP6_ECHO_REPLY) {
655 uint16_t recv_seq = ntohs(icmppkt->icmp6_seq);
658 if (sz >= sizeof(struct icmp6_hdr) + sizeof(uint32_t))
659 tp = (uint32_t *) &icmppkt->icmp6_data8[4];
661 inet_ntop(AF_INET6, &pingaddr.sin6.sin6_addr,
664 } else if (icmppkt->icmp6_type != ICMP6_ECHO_REQUEST) {
665 bb_error_msg("warning: got ICMP %d (%s)",
667 icmp6_type_name(icmppkt->icmp6_type));
672 static void ping4(len_and_sockaddr *lsa)
676 pingsock = create_icmp_socket();
677 pingaddr.sin = lsa->u.sin;
679 if (setsockopt(pingsock, IPPROTO_IP, IP_MULTICAST_IF,
680 &source_lsa->u.sa, source_lsa->len))
681 bb_error_msg_and_die("can't set multicast source interface");
682 xbind(pingsock, &source_lsa->u.sa, source_lsa->len);
685 setsockopt_bindtodevice(pingsock, str_I);
687 /* enable broadcast pings */
688 setsockopt_broadcast(pingsock);
690 /* set recv buf (needed if we can get lots of responses: flood ping,
691 * broadcast ping etc) */
692 sockopt = (datalen * 2) + 7 * 1024; /* giving it a bit of extra room */
693 setsockopt(pingsock, SOL_SOCKET, SO_RCVBUF, &sockopt, sizeof(sockopt));
696 setsockopt(pingsock, IPPROTO_IP, IP_TTL, &opt_ttl, sizeof(opt_ttl));
697 /* above doesnt affect packets sent to bcast IP, so... */
698 setsockopt(pingsock, IPPROTO_IP, IP_MULTICAST_TTL, &opt_ttl, sizeof(opt_ttl));
701 signal(SIGINT, print_stats_and_exit);
703 /* start the ping's going ... */
706 /* listen for replies */
708 struct sockaddr_in from;
709 socklen_t fromlen = (socklen_t) sizeof(from);
712 c = recvfrom(pingsock, G.rcv_packet, G.sizeof_rcv_packet, 0,
713 (struct sockaddr *) &from, &fromlen);
716 bb_perror_msg("recvfrom");
719 unpack4(G.rcv_packet, c, &from);
720 if (pingcount && nreceived >= pingcount)
725 extern int BUG_bad_offsetof_icmp6_cksum(void);
726 static void ping6(len_and_sockaddr *lsa)
730 struct sockaddr_in6 from;
732 char control_buf[CMSG_SPACE(36)];
734 pingsock = create_icmp6_socket();
735 pingaddr.sin6 = lsa->u.sin6;
736 /* untested whether "-I addr" really works for IPv6: */
738 xbind(pingsock, &source_lsa->u.sa, source_lsa->len);
740 setsockopt_bindtodevice(pingsock, str_I);
744 struct icmp6_filter filt;
745 if (!(option_mask32 & OPT_VERBOSE)) {
746 ICMP6_FILTER_SETBLOCKALL(&filt);
747 ICMP6_FILTER_SETPASS(ICMP6_ECHO_REPLY, &filt);
749 ICMP6_FILTER_SETPASSALL(&filt);
751 if (setsockopt(pingsock, IPPROTO_ICMPV6, ICMP6_FILTER, &filt,
753 bb_error_msg_and_die("setsockopt(ICMP6_FILTER)");
755 #endif /*ICMP6_FILTER*/
757 /* enable broadcast pings */
758 setsockopt_broadcast(pingsock);
760 /* set recv buf (needed if we can get lots of responses: flood ping,
761 * broadcast ping etc) */
762 sockopt = (datalen * 2) + 7 * 1024; /* giving it a bit of extra room */
763 setsockopt(pingsock, SOL_SOCKET, SO_RCVBUF, &sockopt, sizeof(sockopt));
765 sockopt = offsetof(struct icmp6_hdr, icmp6_cksum);
766 if (offsetof(struct icmp6_hdr, icmp6_cksum) != 2)
767 BUG_bad_offsetof_icmp6_cksum();
768 setsockopt(pingsock, SOL_RAW, IPV6_CHECKSUM, &sockopt, sizeof(sockopt));
770 /* request ttl info to be returned in ancillary data */
771 setsockopt(pingsock, SOL_IPV6, IPV6_HOPLIMIT, &const_int_1, sizeof(const_int_1));
774 pingaddr.sin6.sin6_scope_id = if_index;
776 signal(SIGINT, print_stats_and_exit);
778 /* start the ping's going ... */
781 /* listen for replies */
782 msg.msg_name = &from;
783 msg.msg_namelen = sizeof(from);
786 msg.msg_control = control_buf;
787 iov.iov_base = G.rcv_packet;
788 iov.iov_len = G.sizeof_rcv_packet;
793 msg.msg_controllen = sizeof(control_buf);
795 c = recvmsg(pingsock, &msg, 0);
798 bb_perror_msg("recvfrom");
801 for (mp = CMSG_FIRSTHDR(&msg); mp; mp = CMSG_NXTHDR(&msg, mp)) {
802 if (mp->cmsg_level == SOL_IPV6
803 && mp->cmsg_type == IPV6_HOPLIMIT
804 /* don't check len - we trust the kernel: */
805 /* && mp->cmsg_len >= CMSG_LEN(sizeof(int)) */
807 /*hoplimit = *(int*)CMSG_DATA(mp); - unaligned access */
808 move_from_unaligned_int(hoplimit, CMSG_DATA(mp));
811 unpack6(G.rcv_packet, c, /*&from,*/ hoplimit);
812 if (pingcount && nreceived >= pingcount)
818 static void ping(len_and_sockaddr *lsa)
820 printf("PING %s (%s)", hostname, dotted);
823 xmalloc_sockaddr2dotted_noport(&source_lsa->u.sa));
825 printf(": %d data bytes\n", datalen);
827 G.sizeof_rcv_packet = datalen + MAXIPLEN + MAXICMPLEN;
828 G.rcv_packet = xzalloc(G.sizeof_rcv_packet);
830 if (lsa->u.sa.sa_family == AF_INET6) {
831 /* +4 reserves a place for timestamp, which may end up sitting
832 * _after_ packet. Saves one if() - see sendping4/6() */
833 G.snd_packet = xzalloc(datalen + sizeof(struct icmp6_hdr) + 4);
838 G.snd_packet = xzalloc(datalen + ICMP_MINLEN + 4);
843 static int common_ping_main(int opt, char **argv)
845 len_and_sockaddr *lsa;
850 /* exactly one argument needed; -v and -q don't mix; -c NUM, -t NUM, -w NUM, -W NUM */
851 opt_complementary = "=1:q--v:v--q:c+:t+:w+:W+";
852 opt |= getopt32(argv, OPT_STRING, &pingcount, &str_s, &opt_ttl, &deadline, &timeout, &str_I);
854 datalen = xatou16(str_s); // -s
855 if (opt & OPT_I) { // -I
856 if_index = if_nametoindex(str_I);
858 /* TODO: I'm not sure it takes IPv6 unless in [XX:XX..] format */
859 source_lsa = xdotted2sockaddr(str_I, 0);
860 str_I = NULL; /* don't try to bind to device later */
863 myid = (uint16_t) getpid();
864 hostname = argv[optind];
867 sa_family_t af = AF_UNSPEC;
872 lsa = xhost_and_af2sockaddr(hostname, 0, af);
875 lsa = xhost_and_af2sockaddr(hostname, 0, AF_INET);
878 if (source_lsa && source_lsa->u.sa.sa_family != lsa->u.sa.sa_family)
879 /* leaking it here... */
882 dotted = xmalloc_sockaddr2dotted_noport(&lsa->u.sa);
884 print_stats_and_exit(EXIT_SUCCESS);
885 /*return EXIT_SUCCESS;*/
887 #endif /* FEATURE_FANCY_PING */
890 int ping_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
891 int ping_main(int argc UNUSED_PARAM, char **argv)
893 #if !ENABLE_FEATURE_FANCY_PING
894 return common_ping_main(AF_UNSPEC, argv);
896 return common_ping_main(0, argv);
901 int ping6_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
902 int ping6_main(int argc UNUSED_PARAM, char **argv)
904 # if !ENABLE_FEATURE_FANCY_PING
905 return common_ping_main(AF_INET6, argv);
907 return common_ping_main(OPT_IPV6, argv);
913 * Copyright (c) 1989 The Regents of the University of California.
914 * All rights reserved.
916 * This code is derived from software contributed to Berkeley by
919 * Redistribution and use in source and binary forms, with or without
920 * modification, are permitted provided that the following conditions
922 * 1. Redistributions of source code must retain the above copyright
923 * notice, this list of conditions and the following disclaimer.
924 * 2. Redistributions in binary form must reproduce the above copyright
925 * notice, this list of conditions and the following disclaimer in the
926 * documentation and/or other materials provided with the distribution.
928 * 3. <BSD Advertising Clause omitted per the July 22, 1999 licensing change
929 * ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change>
931 * 4. Neither the name of the University nor the names of its contributors
932 * may be used to endorse or promote products derived from this software
933 * without specific prior written permission.
935 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
936 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
937 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
938 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
939 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
940 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
941 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
942 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
943 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
944 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF