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>
35 //config: depends on PLATFORM_LINUX
37 //config: ping uses the ICMP protocol's mandatory ECHO_REQUEST datagram to
38 //config: elicit an ICMP ECHO_RESPONSE from a host or gateway.
41 //config: bool "ping6"
43 //config: depends on FEATURE_IPV6 && PING
45 //config: This will give you a ping that can talk IPv6.
47 //config:config FEATURE_FANCY_PING
48 //config: bool "Enable fancy ping output"
50 //config: depends on PING
52 //config: Make the output from the ping applet include statistics, and at the
53 //config: same time provide full support for ICMP packets.
55 //applet:IF_PING(APPLET(ping, _BB_DIR_BIN, _BB_SUID_MAYBE))
56 //applet:IF_PING6(APPLET(ping6, _BB_DIR_BIN, _BB_SUID_MAYBE))
58 //kbuild:lib-$(CONFIG_PING) += ping.o
59 //kbuild:lib-$(CONFIG_PING6) += ping.o
61 //usage:#if !ENABLE_FEATURE_FANCY_PING
62 //usage:# define ping_trivial_usage
64 //usage:# define ping_full_usage "\n\n"
65 //usage: "Send ICMP ECHO_REQUEST packets to network hosts"
66 //usage:# define ping6_trivial_usage
68 //usage:# define ping6_full_usage "\n\n"
69 //usage: "Send ICMP ECHO_REQUEST packets to network hosts"
71 //usage:# define ping_trivial_usage
72 //usage: "[OPTIONS] HOST"
73 //usage:# define ping_full_usage "\n\n"
74 //usage: "Send ICMP ECHO_REQUEST packets to network hosts\n"
76 //usage: "\n -4,-6 Force IP or IPv6 name resolution"
77 //usage: "\n -c CNT Send only CNT pings"
78 //usage: "\n -s SIZE Send SIZE data bytes in packets (default:56)"
79 //usage: "\n -t TTL Set TTL"
80 //usage: "\n -I IFACE/IP Use interface or IP address as source"
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 displays output at start"
86 //usage: "\n and when finished"
88 //usage:# define ping6_trivial_usage
89 //usage: "[OPTIONS] HOST"
90 //usage:# define ping6_full_usage "\n\n"
91 //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 IFACE/IP Use interface or IP address as source"
96 //usage: "\n -q Quiet, only displays output at start"
97 //usage: "\n and when finished"
101 //usage:#define ping_example_usage
102 //usage: "$ ping localhost\n"
103 //usage: "PING slag (127.0.0.1): 56 data bytes\n"
104 //usage: "64 bytes from 127.0.0.1: icmp_seq=0 ttl=255 time=20.1 ms\n"
106 //usage: "--- debian ping statistics ---\n"
107 //usage: "1 packets transmitted, 1 packets received, 0% packet loss\n"
108 //usage: "round-trip min/avg/max = 20.1/20.1/20.1 ms\n"
109 //usage:#define ping6_example_usage
110 //usage: "$ ping6 ip6-localhost\n"
111 //usage: "PING ip6-localhost (::1): 56 data bytes\n"
112 //usage: "64 bytes from ::1: icmp6_seq=0 ttl=64 time=20.1 ms\n"
114 //usage: "--- ip6-localhost ping statistics ---\n"
115 //usage: "1 packets transmitted, 1 packets received, 0% packet loss\n"
116 //usage: "round-trip min/avg/max = 20.1/20.1/20.1 ms\n"
119 # include <netinet/icmp6.h>
120 /* I see RENUMBERED constants in bits/in.h - !!?
121 * What a fuck is going on with libc? Is it a glibc joke? */
122 # ifdef IPV6_2292HOPLIMIT
123 # undef IPV6_HOPLIMIT
124 # define IPV6_HOPLIMIT IPV6_2292HOPLIMIT
132 MAX_DUP_CHK = (8 * 128),
134 PINGINTERVAL = 1, /* 1 second */
137 /* Common routines */
139 static int in_cksum(unsigned short *buf, int sz)
143 unsigned short *w = buf;
144 unsigned short ans = 0;
152 *(unsigned char *) (&ans) = *(unsigned char *) w;
156 sum = (sum >> 16) + (sum & 0xFFFF);
162 #if !ENABLE_FEATURE_FANCY_PING
168 char packet[DEFDATALEN + MAXIPLEN + MAXICMPLEN];
170 #define G (*(struct globals*)&bb_common_bufsiz1)
171 #define INIT_G() do { } while (0)
173 static void noresp(int ign UNUSED_PARAM)
175 printf("No response from %s\n", G.hostname);
179 static void ping4(len_and_sockaddr *lsa)
184 pingsock = create_icmp_socket();
186 pkt = (struct icmp *) G.packet;
187 memset(pkt, 0, sizeof(G.packet));
188 pkt->icmp_type = ICMP_ECHO;
189 pkt->icmp_cksum = in_cksum((unsigned short *) pkt, sizeof(G.packet));
191 xsendto(pingsock, G.packet, DEFDATALEN + ICMP_MINLEN, &lsa->u.sa, lsa->len);
193 /* listen for replies */
195 struct sockaddr_in from;
196 socklen_t fromlen = sizeof(from);
198 c = recvfrom(pingsock, G.packet, sizeof(G.packet), 0,
199 (struct sockaddr *) &from, &fromlen);
202 bb_perror_msg("recvfrom");
205 if (c >= 76) { /* ip + icmp */
206 struct iphdr *iphdr = (struct iphdr *) G.packet;
208 pkt = (struct icmp *) (G.packet + (iphdr->ihl << 2)); /* skip ip hdr */
209 if (pkt->icmp_type == ICMP_ECHOREPLY)
213 if (ENABLE_FEATURE_CLEAN_UP)
218 static void ping6(len_and_sockaddr *lsa)
220 struct icmp6_hdr *pkt;
224 pingsock = create_icmp6_socket();
226 pkt = (struct icmp6_hdr *) G.packet;
227 memset(pkt, 0, sizeof(G.packet));
228 pkt->icmp6_type = ICMP6_ECHO_REQUEST;
230 sockopt = offsetof(struct icmp6_hdr, icmp6_cksum);
231 setsockopt(pingsock, SOL_RAW, IPV6_CHECKSUM, &sockopt, sizeof(sockopt));
233 xsendto(pingsock, G.packet, DEFDATALEN + sizeof(struct icmp6_hdr), &lsa->u.sa, lsa->len);
235 /* listen for replies */
237 struct sockaddr_in6 from;
238 socklen_t fromlen = sizeof(from);
240 c = recvfrom(pingsock, G.packet, sizeof(G.packet), 0,
241 (struct sockaddr *) &from, &fromlen);
244 bb_perror_msg("recvfrom");
247 if (c >= ICMP_MINLEN) { /* icmp6_hdr */
248 pkt = (struct icmp6_hdr *) G.packet;
249 if (pkt->icmp6_type == ICMP6_ECHO_REPLY)
253 if (ENABLE_FEATURE_CLEAN_UP)
259 # define common_ping_main(af, argv) common_ping_main(argv)
261 static int common_ping_main(sa_family_t af, char **argv)
263 len_and_sockaddr *lsa;
268 while ((++argv)[0] && argv[0][0] == '-') {
269 if (argv[0][1] == '4') {
273 if (argv[0][1] == '6') {
288 lsa = xhost_and_af2sockaddr(G.hostname, 0, af);
290 lsa = xhost_and_af2sockaddr(G.hostname, 0, AF_INET);
292 /* Set timer _after_ DNS resolution */
293 signal(SIGALRM, noresp);
294 alarm(5); /* give the host 5000ms to respond */
297 if (lsa->u.sa.sa_family == AF_INET6)
302 printf("%s is alive!\n", G.hostname);
307 #else /* FEATURE_FANCY_PING */
310 /* Full(er) version */
312 #define OPT_STRING ("qvc:s:t:w:W:I:4" IF_PING6("6"))
315 OPT_VERBOSE = 1 << 1,
323 OPT_IPV6 = (1 << 9) * ENABLE_PING6,
331 len_and_sockaddr *source_lsa;
333 unsigned pingcount; /* must be int-sized */
335 unsigned long ntransmitted, nreceived, nrepeats;
337 unsigned tmin, tmax; /* in us */
338 unsigned long long tsum; /* in us, sum of all times */
342 unsigned sizeof_rcv_packet;
343 char *rcv_packet; /* [datalen + MAXIPLEN + MAXICMPLEN] */
344 void *snd_packet; /* [datalen + ipv4/ipv6_const] */
345 const char *hostname;
349 struct sockaddr_in sin;
351 struct sockaddr_in6 sin6;
354 char rcvd_tbl[MAX_DUP_CHK / 8];
356 #define G (*(struct globals*)&bb_common_bufsiz1)
357 #define pingsock (G.pingsock )
358 #define if_index (G.if_index )
359 #define source_lsa (G.source_lsa )
360 #define str_I (G.str_I )
361 #define datalen (G.datalen )
362 #define ntransmitted (G.ntransmitted)
363 #define nreceived (G.nreceived )
364 #define nrepeats (G.nrepeats )
365 #define pingcount (G.pingcount )
366 #define opt_ttl (G.opt_ttl )
367 #define myid (G.myid )
368 #define tmin (G.tmin )
369 #define tmax (G.tmax )
370 #define tsum (G.tsum )
371 #define deadline (G.deadline )
372 #define timeout (G.timeout )
373 #define total_secs (G.total_secs )
374 #define hostname (G.hostname )
375 #define dotted (G.dotted )
376 #define pingaddr (G.pingaddr )
377 #define rcvd_tbl (G.rcvd_tbl )
378 void BUG_ping_globals_too_big(void);
379 #define INIT_G() do { \
380 if (sizeof(G) > COMMON_BUFSIZE) \
381 BUG_ping_globals_too_big(); \
383 datalen = DEFDATALEN; \
389 #define A(bit) rcvd_tbl[(bit)>>3] /* identify byte in array */
390 #define B(bit) (1 << ((bit) & 0x07)) /* identify bit in byte */
391 #define SET(bit) (A(bit) |= B(bit))
392 #define CLR(bit) (A(bit) &= (~B(bit)))
393 #define TST(bit) (A(bit) & B(bit))
395 /**************************************************************************/
397 static void print_stats_and_exit(int junk) NORETURN;
398 static void print_stats_and_exit(int junk UNUSED_PARAM)
400 signal(SIGINT, SIG_IGN);
402 printf("\n--- %s ping statistics ---\n", hostname);
403 printf("%lu packets transmitted, ", ntransmitted);
404 printf("%lu packets received, ", nreceived);
406 printf("%lu duplicates, ", nrepeats);
408 ntransmitted = (ntransmitted - nreceived) * 100 / ntransmitted;
409 printf("%lu%% packet loss\n", ntransmitted);
410 if (tmin != UINT_MAX) {
411 unsigned tavg = tsum / (nreceived + nrepeats);
412 printf("round-trip min/avg/max = %u.%03u/%u.%03u/%u.%03u ms\n",
413 tmin / 1000, tmin % 1000,
414 tavg / 1000, tavg % 1000,
415 tmax / 1000, tmax % 1000);
417 /* if condition is true, exit with 1 -- 'failure' */
418 exit(nreceived == 0 || (deadline && nreceived < pingcount));
421 static void sendping_tail(void (*sp)(int), const void *pkt, int size_pkt)
425 CLR((uint16_t)ntransmitted % MAX_DUP_CHK);
428 /* sizeof(pingaddr) can be larger than real sa size, but I think
429 * it doesn't matter */
430 sz = xsendto(pingsock, pkt, size_pkt, &pingaddr.sa, sizeof(pingaddr));
432 bb_error_msg_and_die(bb_msg_write_error);
434 if (pingcount == 0 || deadline || ntransmitted < pingcount) {
435 /* Didn't send all pings yet - schedule next in 1s */
438 total_secs += PINGINTERVAL;
439 if (total_secs >= deadline)
440 signal(SIGALRM, print_stats_and_exit);
443 } else { /* -c NN, and all NN are sent (and no deadline) */
444 /* Wait for the last ping to come back.
445 * -W timeout: wait for a response in seconds.
446 * Affects only timeout in absense of any responses,
447 * otherwise ping waits for two RTTs. */
448 unsigned expire = timeout;
451 /* approx. 2*tmax, in seconds (2 RTT) */
452 expire = tmax / (512*1024);
456 signal(SIGALRM, print_stats_and_exit);
461 static void sendping4(int junk UNUSED_PARAM)
463 struct icmp *pkt = G.snd_packet;
465 //memset(pkt, 0, datalen + ICMP_MINLEN + 4); - G.snd_packet was xzalloced
466 pkt->icmp_type = ICMP_ECHO;
467 /*pkt->icmp_code = 0;*/
468 pkt->icmp_cksum = 0; /* cksum is calculated with this field set to 0 */
469 pkt->icmp_seq = htons(ntransmitted); /* don't ++ here, it can be a macro */
472 /* If datalen < 4, we store timestamp _past_ the packet,
473 * but it's ok - we allocated 4 extra bytes in xzalloc() just in case.
475 /*if (datalen >= 4)*/
476 /* No hton: we'll read it back on the same machine */
477 *(uint32_t*)&pkt->icmp_dun = monotonic_us();
479 pkt->icmp_cksum = in_cksum((unsigned short *) pkt, datalen + ICMP_MINLEN);
481 sendping_tail(sendping4, pkt, datalen + ICMP_MINLEN);
484 static void sendping6(int junk UNUSED_PARAM)
486 struct icmp6_hdr *pkt = alloca(datalen + sizeof(struct icmp6_hdr) + 4);
488 //memset(pkt, 0, datalen + sizeof(struct icmp6_hdr) + 4);
489 pkt->icmp6_type = ICMP6_ECHO_REQUEST;
490 /*pkt->icmp6_code = 0;*/
491 /*pkt->icmp6_cksum = 0;*/
492 pkt->icmp6_seq = htons(ntransmitted); /* don't ++ here, it can be a macro */
493 pkt->icmp6_id = myid;
495 /*if (datalen >= 4)*/
496 *(uint32_t*)(&pkt->icmp6_data8[4]) = monotonic_us();
498 //TODO? pkt->icmp_cksum = in_cksum(...);
500 sendping_tail(sendping6, pkt, datalen + sizeof(struct icmp6_hdr));
504 static const char *icmp_type_name(int id)
507 case ICMP_ECHOREPLY: return "Echo Reply";
508 case ICMP_DEST_UNREACH: return "Destination Unreachable";
509 case ICMP_SOURCE_QUENCH: return "Source Quench";
510 case ICMP_REDIRECT: return "Redirect (change route)";
511 case ICMP_ECHO: return "Echo Request";
512 case ICMP_TIME_EXCEEDED: return "Time Exceeded";
513 case ICMP_PARAMETERPROB: return "Parameter Problem";
514 case ICMP_TIMESTAMP: return "Timestamp Request";
515 case ICMP_TIMESTAMPREPLY: return "Timestamp Reply";
516 case ICMP_INFO_REQUEST: return "Information Request";
517 case ICMP_INFO_REPLY: return "Information Reply";
518 case ICMP_ADDRESS: return "Address Mask Request";
519 case ICMP_ADDRESSREPLY: return "Address Mask Reply";
520 default: return "unknown ICMP type";
524 /* RFC3542 changed some definitions from RFC2292 for no good reason, whee!
525 * the newer 3542 uses a MLD_ prefix where as 2292 uses ICMP6_ prefix */
526 #ifndef MLD_LISTENER_QUERY
527 # define MLD_LISTENER_QUERY ICMP6_MEMBERSHIP_QUERY
529 #ifndef MLD_LISTENER_REPORT
530 # define MLD_LISTENER_REPORT ICMP6_MEMBERSHIP_REPORT
532 #ifndef MLD_LISTENER_REDUCTION
533 # define MLD_LISTENER_REDUCTION ICMP6_MEMBERSHIP_REDUCTION
535 static const char *icmp6_type_name(int id)
538 case ICMP6_DST_UNREACH: return "Destination Unreachable";
539 case ICMP6_PACKET_TOO_BIG: return "Packet too big";
540 case ICMP6_TIME_EXCEEDED: return "Time Exceeded";
541 case ICMP6_PARAM_PROB: return "Parameter Problem";
542 case ICMP6_ECHO_REPLY: return "Echo Reply";
543 case ICMP6_ECHO_REQUEST: return "Echo Request";
544 case MLD_LISTENER_QUERY: return "Listener Query";
545 case MLD_LISTENER_REPORT: return "Listener Report";
546 case MLD_LISTENER_REDUCTION: return "Listener Reduction";
547 default: return "unknown ICMP type";
552 static void unpack_tail(int sz, uint32_t *tp,
553 const char *from_str,
554 uint16_t recv_seq, int ttl)
556 const char *dupmsg = " (DUP!)";
557 unsigned triptime = triptime; /* for gcc */
562 /* (int32_t) cast is for hypothetical 64-bit unsigned */
563 /* (doesn't hurt 32-bit real-world anyway) */
564 triptime = (int32_t) ((uint32_t)monotonic_us() - *tp);
572 if (TST(recv_seq % MAX_DUP_CHK)) {
576 SET(recv_seq % MAX_DUP_CHK);
580 if (option_mask32 & OPT_QUIET)
583 printf("%d bytes from %s: seq=%u ttl=%d", sz,
584 from_str, recv_seq, ttl);
586 printf(" time=%u.%03u ms", triptime / 1000, triptime % 1000);
590 static void unpack4(char *buf, int sz, struct sockaddr_in *from)
592 struct icmp *icmppkt;
596 /* discard if too short */
597 if (sz < (datalen + ICMP_MINLEN))
600 /* check IP header */
601 iphdr = (struct iphdr *) buf;
602 hlen = iphdr->ihl << 2;
604 icmppkt = (struct icmp *) (buf + hlen);
605 if (icmppkt->icmp_id != myid)
606 return; /* not our ping */
608 if (icmppkt->icmp_type == ICMP_ECHOREPLY) {
609 uint16_t recv_seq = ntohs(icmppkt->icmp_seq);
612 if (sz >= ICMP_MINLEN + sizeof(uint32_t))
613 tp = (uint32_t *) icmppkt->icmp_data;
615 inet_ntoa(*(struct in_addr *) &from->sin_addr.s_addr),
616 recv_seq, iphdr->ttl);
617 } else if (icmppkt->icmp_type != ICMP_ECHO) {
618 bb_error_msg("warning: got ICMP %d (%s)",
620 icmp_type_name(icmppkt->icmp_type));
624 static void unpack6(char *packet, int sz, /*struct sockaddr_in6 *from,*/ int hoplimit)
626 struct icmp6_hdr *icmppkt;
627 char buf[INET6_ADDRSTRLEN];
629 /* discard if too short */
630 if (sz < (datalen + sizeof(struct icmp6_hdr)))
633 icmppkt = (struct icmp6_hdr *) packet;
634 if (icmppkt->icmp6_id != myid)
635 return; /* not our ping */
637 if (icmppkt->icmp6_type == ICMP6_ECHO_REPLY) {
638 uint16_t recv_seq = ntohs(icmppkt->icmp6_seq);
641 if (sz >= sizeof(struct icmp6_hdr) + sizeof(uint32_t))
642 tp = (uint32_t *) &icmppkt->icmp6_data8[4];
644 inet_ntop(AF_INET6, &pingaddr.sin6.sin6_addr,
647 } else if (icmppkt->icmp6_type != ICMP6_ECHO_REQUEST) {
648 bb_error_msg("warning: got ICMP %d (%s)",
650 icmp6_type_name(icmppkt->icmp6_type));
655 static void ping4(len_and_sockaddr *lsa)
659 pingsock = create_icmp_socket();
660 pingaddr.sin = lsa->u.sin;
662 if (setsockopt(pingsock, IPPROTO_IP, IP_MULTICAST_IF,
663 &source_lsa->u.sa, source_lsa->len))
664 bb_error_msg_and_die("can't set multicast source interface");
665 xbind(pingsock, &source_lsa->u.sa, source_lsa->len);
668 setsockopt_bindtodevice(pingsock, str_I);
670 /* enable broadcast pings */
671 setsockopt_broadcast(pingsock);
673 /* set recv buf (needed if we can get lots of responses: flood ping,
674 * broadcast ping etc) */
675 sockopt = (datalen * 2) + 7 * 1024; /* giving it a bit of extra room */
676 setsockopt(pingsock, SOL_SOCKET, SO_RCVBUF, &sockopt, sizeof(sockopt));
679 //setsockopt(pingsock, IPPROTO_IP, IP_MULTICAST_TTL, &opt_ttl, sizeof(opt_ttl));
680 setsockopt(pingsock, IPPROTO_IP, IP_TTL, &opt_ttl, sizeof(opt_ttl));
682 signal(SIGINT, print_stats_and_exit);
684 /* start the ping's going ... */
687 /* listen for replies */
689 struct sockaddr_in from;
690 socklen_t fromlen = (socklen_t) sizeof(from);
693 c = recvfrom(pingsock, G.rcv_packet, G.sizeof_rcv_packet, 0,
694 (struct sockaddr *) &from, &fromlen);
697 bb_perror_msg("recvfrom");
700 unpack4(G.rcv_packet, c, &from);
701 if (pingcount && nreceived >= pingcount)
706 extern int BUG_bad_offsetof_icmp6_cksum(void);
707 static void ping6(len_and_sockaddr *lsa)
711 struct sockaddr_in6 from;
713 char control_buf[CMSG_SPACE(36)];
715 pingsock = create_icmp6_socket();
716 pingaddr.sin6 = lsa->u.sin6;
717 /* untested whether "-I addr" really works for IPv6: */
719 xbind(pingsock, &source_lsa->u.sa, source_lsa->len);
721 setsockopt_bindtodevice(pingsock, str_I);
725 struct icmp6_filter filt;
726 if (!(option_mask32 & OPT_VERBOSE)) {
727 ICMP6_FILTER_SETBLOCKALL(&filt);
728 ICMP6_FILTER_SETPASS(ICMP6_ECHO_REPLY, &filt);
730 ICMP6_FILTER_SETPASSALL(&filt);
732 if (setsockopt(pingsock, IPPROTO_ICMPV6, ICMP6_FILTER, &filt,
734 bb_error_msg_and_die("setsockopt(ICMP6_FILTER)");
736 #endif /*ICMP6_FILTER*/
738 /* enable broadcast pings */
739 setsockopt_broadcast(pingsock);
741 /* set recv buf (needed if we can get lots of responses: flood ping,
742 * broadcast ping etc) */
743 sockopt = (datalen * 2) + 7 * 1024; /* giving it a bit of extra room */
744 setsockopt(pingsock, SOL_SOCKET, SO_RCVBUF, &sockopt, sizeof(sockopt));
746 sockopt = offsetof(struct icmp6_hdr, icmp6_cksum);
747 if (offsetof(struct icmp6_hdr, icmp6_cksum) != 2)
748 BUG_bad_offsetof_icmp6_cksum();
749 setsockopt(pingsock, SOL_RAW, IPV6_CHECKSUM, &sockopt, sizeof(sockopt));
751 /* request ttl info to be returned in ancillary data */
752 setsockopt(pingsock, SOL_IPV6, IPV6_HOPLIMIT, &const_int_1, sizeof(const_int_1));
755 pingaddr.sin6.sin6_scope_id = if_index;
757 signal(SIGINT, print_stats_and_exit);
759 /* start the ping's going ... */
762 /* listen for replies */
763 msg.msg_name = &from;
764 msg.msg_namelen = sizeof(from);
767 msg.msg_control = control_buf;
768 iov.iov_base = G.rcv_packet;
769 iov.iov_len = G.sizeof_rcv_packet;
774 msg.msg_controllen = sizeof(control_buf);
776 c = recvmsg(pingsock, &msg, 0);
779 bb_perror_msg("recvfrom");
782 for (mp = CMSG_FIRSTHDR(&msg); mp; mp = CMSG_NXTHDR(&msg, mp)) {
783 if (mp->cmsg_level == SOL_IPV6
784 && mp->cmsg_type == IPV6_HOPLIMIT
785 /* don't check len - we trust the kernel: */
786 /* && mp->cmsg_len >= CMSG_LEN(sizeof(int)) */
788 /*hoplimit = *(int*)CMSG_DATA(mp); - unaligned access */
789 move_from_unaligned_int(hoplimit, CMSG_DATA(mp));
792 unpack6(G.rcv_packet, c, /*&from,*/ hoplimit);
793 if (pingcount && nreceived >= pingcount)
799 static void ping(len_and_sockaddr *lsa)
801 printf("PING %s (%s)", hostname, dotted);
804 xmalloc_sockaddr2dotted_noport(&source_lsa->u.sa));
806 printf(": %d data bytes\n", datalen);
808 G.sizeof_rcv_packet = datalen + MAXIPLEN + MAXICMPLEN;
809 G.rcv_packet = xzalloc(G.sizeof_rcv_packet);
811 if (lsa->u.sa.sa_family == AF_INET6) {
812 /* +4 reserves a place for timestamp, which may end up sitting
813 * _after_ packet. Saves one if() - see sendping4/6() */
814 G.snd_packet = xzalloc(datalen + sizeof(struct icmp6_hdr) + 4);
819 G.snd_packet = xzalloc(datalen + ICMP_MINLEN + 4);
824 static int common_ping_main(int opt, char **argv)
826 len_and_sockaddr *lsa;
831 /* exactly one argument needed; -v and -q don't mix; -c NUM, -t NUM, -w NUM, -W NUM */
832 opt_complementary = "=1:q--v:v--q:c+:t+:w+:W+";
833 opt |= getopt32(argv, OPT_STRING, &pingcount, &str_s, &opt_ttl, &deadline, &timeout, &str_I);
835 datalen = xatou16(str_s); // -s
836 if (opt & OPT_I) { // -I
837 if_index = if_nametoindex(str_I);
839 /* TODO: I'm not sure it takes IPv6 unless in [XX:XX..] format */
840 source_lsa = xdotted2sockaddr(str_I, 0);
841 str_I = NULL; /* don't try to bind to device later */
844 myid = (uint16_t) getpid();
845 hostname = argv[optind];
848 sa_family_t af = AF_UNSPEC;
853 lsa = xhost_and_af2sockaddr(hostname, 0, af);
856 lsa = xhost_and_af2sockaddr(hostname, 0, AF_INET);
859 if (source_lsa && source_lsa->u.sa.sa_family != lsa->u.sa.sa_family)
860 /* leaking it here... */
863 dotted = xmalloc_sockaddr2dotted_noport(&lsa->u.sa);
865 print_stats_and_exit(EXIT_SUCCESS);
866 /*return EXIT_SUCCESS;*/
868 #endif /* FEATURE_FANCY_PING */
871 int ping_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
872 int ping_main(int argc UNUSED_PARAM, char **argv)
874 #if !ENABLE_FEATURE_FANCY_PING
875 return common_ping_main(AF_UNSPEC, argv);
877 return common_ping_main(0, argv);
882 int ping6_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
883 int ping6_main(int argc UNUSED_PARAM, char **argv)
885 # if !ENABLE_FEATURE_FANCY_PING
886 return common_ping_main(AF_INET6, argv);
888 return common_ping_main(OPT_IPV6, argv);
894 * Copyright (c) 1989 The Regents of the University of California.
895 * All rights reserved.
897 * This code is derived from software contributed to Berkeley by
900 * Redistribution and use in source and binary forms, with or without
901 * modification, are permitted provided that the following conditions
903 * 1. Redistributions of source code must retain the above copyright
904 * notice, this list of conditions and the following disclaimer.
905 * 2. Redistributions in binary form must reproduce the above copyright
906 * notice, this list of conditions and the following disclaimer in the
907 * documentation and/or other materials provided with the distribution.
909 * 3. <BSD Advertising Clause omitted per the July 22, 1999 licensing change
910 * ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change>
912 * 4. Neither the name of the University nor the names of its contributors
913 * may be used to endorse or promote products derived from this software
914 * without specific prior written permission.
916 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
917 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
918 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
919 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
920 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
921 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
922 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
923 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
924 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
925 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF