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 /* Needs socket(AF_INET, SOCK_RAW, IPPROTO_ICMP), therefore _BB_SUID_MAYBE: */
56 //applet:IF_PING(APPLET(ping, _BB_DIR_BIN, _BB_SUID_MAYBE))
57 //applet:IF_PING6(APPLET(ping6, _BB_DIR_BIN, _BB_SUID_MAYBE))
59 //kbuild:lib-$(CONFIG_PING) += ping.o
60 //kbuild:lib-$(CONFIG_PING6) += ping.o
62 //usage:#if !ENABLE_FEATURE_FANCY_PING
63 //usage:# define ping_trivial_usage
65 //usage:# define ping_full_usage "\n\n"
66 //usage: "Send ICMP ECHO_REQUEST packets to network hosts"
67 //usage:# define ping6_trivial_usage
69 //usage:# define ping6_full_usage "\n\n"
70 //usage: "Send ICMP ECHO_REQUEST packets to network hosts"
72 //usage:# define ping_trivial_usage
73 //usage: "[OPTIONS] HOST"
74 //usage:# define ping_full_usage "\n\n"
75 //usage: "Send ICMP ECHO_REQUEST packets to network hosts\n"
77 //usage: "\n -4,-6 Force IP or IPv6 name resolution"
78 //usage: "\n -c CNT Send only CNT pings"
79 //usage: "\n -s SIZE Send SIZE data bytes in packets (default:56)"
80 //usage: "\n -t TTL Set TTL"
81 //usage: "\n -I IFACE/IP Use interface or IP address as source"
82 //usage: "\n -W SEC Seconds to wait for the first response (default:10)"
83 //usage: "\n (after all -c CNT packets are sent)"
84 //usage: "\n -w SEC Seconds until ping exits (default:infinite)"
85 //usage: "\n (can exit earlier with -c CNT)"
86 //usage: "\n -q Quiet, only displays output at start"
87 //usage: "\n and when finished"
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"
94 //usage: "\n -c CNT Send only CNT pings"
95 //usage: "\n -s SIZE Send SIZE data bytes in packets (default:56)"
96 //usage: "\n -I IFACE/IP Use interface or IP address as source"
97 //usage: "\n -q Quiet, only displays output at start"
98 //usage: "\n and when finished"
102 //usage:#define ping_example_usage
103 //usage: "$ ping localhost\n"
104 //usage: "PING slag (127.0.0.1): 56 data bytes\n"
105 //usage: "64 bytes from 127.0.0.1: icmp_seq=0 ttl=255 time=20.1 ms\n"
107 //usage: "--- debian ping statistics ---\n"
108 //usage: "1 packets transmitted, 1 packets received, 0% packet loss\n"
109 //usage: "round-trip min/avg/max = 20.1/20.1/20.1 ms\n"
110 //usage:#define ping6_example_usage
111 //usage: "$ ping6 ip6-localhost\n"
112 //usage: "PING ip6-localhost (::1): 56 data bytes\n"
113 //usage: "64 bytes from ::1: icmp6_seq=0 ttl=64 time=20.1 ms\n"
115 //usage: "--- ip6-localhost ping statistics ---\n"
116 //usage: "1 packets transmitted, 1 packets received, 0% packet loss\n"
117 //usage: "round-trip min/avg/max = 20.1/20.1/20.1 ms\n"
120 # include <netinet/icmp6.h>
121 /* I see RENUMBERED constants in bits/in.h - !!?
122 * What a fuck is going on with libc? Is it a glibc joke? */
123 # ifdef IPV6_2292HOPLIMIT
124 # undef IPV6_HOPLIMIT
125 # define IPV6_HOPLIMIT IPV6_2292HOPLIMIT
133 MAX_DUP_CHK = (8 * 128),
135 PINGINTERVAL = 1, /* 1 second */
138 /* Common routines */
140 static int in_cksum(unsigned short *buf, int sz)
144 unsigned short *w = buf;
145 unsigned short ans = 0;
153 *(unsigned char *) (&ans) = *(unsigned char *) w;
157 sum = (sum >> 16) + (sum & 0xFFFF);
163 #if !ENABLE_FEATURE_FANCY_PING
169 char packet[DEFDATALEN + MAXIPLEN + MAXICMPLEN];
171 #define G (*(struct globals*)&bb_common_bufsiz1)
172 #define INIT_G() do { } while (0)
174 static void noresp(int ign UNUSED_PARAM)
176 printf("No response from %s\n", G.hostname);
180 static void ping4(len_and_sockaddr *lsa)
185 pingsock = create_icmp_socket();
187 pkt = (struct icmp *) G.packet;
188 memset(pkt, 0, sizeof(G.packet));
189 pkt->icmp_type = ICMP_ECHO;
190 pkt->icmp_cksum = in_cksum((unsigned short *) pkt, sizeof(G.packet));
192 xsendto(pingsock, G.packet, DEFDATALEN + ICMP_MINLEN, &lsa->u.sa, lsa->len);
194 /* listen for replies */
196 struct sockaddr_in from;
197 socklen_t fromlen = sizeof(from);
199 c = recvfrom(pingsock, G.packet, sizeof(G.packet), 0,
200 (struct sockaddr *) &from, &fromlen);
203 bb_perror_msg("recvfrom");
206 if (c >= 76) { /* ip + icmp */
207 struct iphdr *iphdr = (struct iphdr *) G.packet;
209 pkt = (struct icmp *) (G.packet + (iphdr->ihl << 2)); /* skip ip hdr */
210 if (pkt->icmp_type == ICMP_ECHOREPLY)
214 if (ENABLE_FEATURE_CLEAN_UP)
219 static void ping6(len_and_sockaddr *lsa)
221 struct icmp6_hdr *pkt;
225 pingsock = create_icmp6_socket();
227 pkt = (struct icmp6_hdr *) G.packet;
228 memset(pkt, 0, sizeof(G.packet));
229 pkt->icmp6_type = ICMP6_ECHO_REQUEST;
231 sockopt = offsetof(struct icmp6_hdr, icmp6_cksum);
232 setsockopt(pingsock, SOL_RAW, IPV6_CHECKSUM, &sockopt, sizeof(sockopt));
234 xsendto(pingsock, G.packet, DEFDATALEN + sizeof(struct icmp6_hdr), &lsa->u.sa, lsa->len);
236 /* listen for replies */
238 struct sockaddr_in6 from;
239 socklen_t fromlen = sizeof(from);
241 c = recvfrom(pingsock, G.packet, sizeof(G.packet), 0,
242 (struct sockaddr *) &from, &fromlen);
245 bb_perror_msg("recvfrom");
248 if (c >= ICMP_MINLEN) { /* icmp6_hdr */
249 pkt = (struct icmp6_hdr *) G.packet;
250 if (pkt->icmp6_type == ICMP6_ECHO_REPLY)
254 if (ENABLE_FEATURE_CLEAN_UP)
260 # define common_ping_main(af, argv) common_ping_main(argv)
262 static int common_ping_main(sa_family_t af, char **argv)
264 len_and_sockaddr *lsa;
269 while ((++argv)[0] && argv[0][0] == '-') {
270 if (argv[0][1] == '4') {
274 if (argv[0][1] == '6') {
289 lsa = xhost_and_af2sockaddr(G.hostname, 0, af);
291 lsa = xhost_and_af2sockaddr(G.hostname, 0, AF_INET);
293 /* Set timer _after_ DNS resolution */
294 signal(SIGALRM, noresp);
295 alarm(5); /* give the host 5000ms to respond */
298 if (lsa->u.sa.sa_family == AF_INET6)
303 printf("%s is alive!\n", G.hostname);
308 #else /* FEATURE_FANCY_PING */
311 /* Full(er) version */
313 #define OPT_STRING ("qvc:s:t:w:W:I:4" IF_PING6("6"))
316 OPT_VERBOSE = 1 << 1,
324 OPT_IPV6 = (1 << 9) * ENABLE_PING6,
332 len_and_sockaddr *source_lsa;
334 unsigned pingcount; /* must be int-sized */
336 unsigned long ntransmitted, nreceived, nrepeats;
338 unsigned tmin, tmax; /* in us */
339 unsigned long long tsum; /* in us, sum of all times */
343 unsigned sizeof_rcv_packet;
344 char *rcv_packet; /* [datalen + MAXIPLEN + MAXICMPLEN] */
345 void *snd_packet; /* [datalen + ipv4/ipv6_const] */
346 const char *hostname;
350 struct sockaddr_in sin;
352 struct sockaddr_in6 sin6;
355 char rcvd_tbl[MAX_DUP_CHK / 8];
357 #define G (*(struct globals*)&bb_common_bufsiz1)
358 #define pingsock (G.pingsock )
359 #define if_index (G.if_index )
360 #define source_lsa (G.source_lsa )
361 #define str_I (G.str_I )
362 #define datalen (G.datalen )
363 #define ntransmitted (G.ntransmitted)
364 #define nreceived (G.nreceived )
365 #define nrepeats (G.nrepeats )
366 #define pingcount (G.pingcount )
367 #define opt_ttl (G.opt_ttl )
368 #define myid (G.myid )
369 #define tmin (G.tmin )
370 #define tmax (G.tmax )
371 #define tsum (G.tsum )
372 #define deadline (G.deadline )
373 #define timeout (G.timeout )
374 #define total_secs (G.total_secs )
375 #define hostname (G.hostname )
376 #define dotted (G.dotted )
377 #define pingaddr (G.pingaddr )
378 #define rcvd_tbl (G.rcvd_tbl )
379 void BUG_ping_globals_too_big(void);
380 #define INIT_G() do { \
381 if (sizeof(G) > COMMON_BUFSIZE) \
382 BUG_ping_globals_too_big(); \
384 datalen = DEFDATALEN; \
390 #define A(bit) rcvd_tbl[(bit)>>3] /* identify byte in array */
391 #define B(bit) (1 << ((bit) & 0x07)) /* identify bit in byte */
392 #define SET(bit) (A(bit) |= B(bit))
393 #define CLR(bit) (A(bit) &= (~B(bit)))
394 #define TST(bit) (A(bit) & B(bit))
396 /**************************************************************************/
398 static void print_stats_and_exit(int junk) NORETURN;
399 static void print_stats_and_exit(int junk UNUSED_PARAM)
401 signal(SIGINT, SIG_IGN);
403 printf("\n--- %s ping statistics ---\n", hostname);
404 printf("%lu packets transmitted, ", ntransmitted);
405 printf("%lu packets received, ", nreceived);
407 printf("%lu duplicates, ", nrepeats);
409 ntransmitted = (ntransmitted - nreceived) * 100 / ntransmitted;
410 printf("%lu%% packet loss\n", ntransmitted);
411 if (tmin != UINT_MAX) {
412 unsigned tavg = tsum / (nreceived + nrepeats);
413 printf("round-trip min/avg/max = %u.%03u/%u.%03u/%u.%03u ms\n",
414 tmin / 1000, tmin % 1000,
415 tavg / 1000, tavg % 1000,
416 tmax / 1000, tmax % 1000);
418 /* if condition is true, exit with 1 -- 'failure' */
419 exit(nreceived == 0 || (deadline && nreceived < pingcount));
422 static void sendping_tail(void (*sp)(int), const void *pkt, int size_pkt)
426 CLR((uint16_t)ntransmitted % MAX_DUP_CHK);
429 /* sizeof(pingaddr) can be larger than real sa size, but I think
430 * it doesn't matter */
431 sz = xsendto(pingsock, pkt, size_pkt, &pingaddr.sa, sizeof(pingaddr));
433 bb_error_msg_and_die(bb_msg_write_error);
435 if (pingcount == 0 || deadline || ntransmitted < pingcount) {
436 /* Didn't send all pings yet - schedule next in 1s */
439 total_secs += PINGINTERVAL;
440 if (total_secs >= deadline)
441 signal(SIGALRM, print_stats_and_exit);
444 } else { /* -c NN, and all NN are sent (and no deadline) */
445 /* Wait for the last ping to come back.
446 * -W timeout: wait for a response in seconds.
447 * Affects only timeout in absense of any responses,
448 * otherwise ping waits for two RTTs. */
449 unsigned expire = timeout;
452 /* approx. 2*tmax, in seconds (2 RTT) */
453 expire = tmax / (512*1024);
457 signal(SIGALRM, print_stats_and_exit);
462 static void sendping4(int junk UNUSED_PARAM)
464 struct icmp *pkt = G.snd_packet;
466 //memset(pkt, 0, datalen + ICMP_MINLEN + 4); - G.snd_packet was xzalloced
467 pkt->icmp_type = ICMP_ECHO;
468 /*pkt->icmp_code = 0;*/
469 pkt->icmp_cksum = 0; /* cksum is calculated with this field set to 0 */
470 pkt->icmp_seq = htons(ntransmitted); /* don't ++ here, it can be a macro */
473 /* If datalen < 4, we store timestamp _past_ the packet,
474 * but it's ok - we allocated 4 extra bytes in xzalloc() just in case.
476 /*if (datalen >= 4)*/
477 /* No hton: we'll read it back on the same machine */
478 *(uint32_t*)&pkt->icmp_dun = monotonic_us();
480 pkt->icmp_cksum = in_cksum((unsigned short *) pkt, datalen + ICMP_MINLEN);
482 sendping_tail(sendping4, pkt, datalen + ICMP_MINLEN);
485 static void sendping6(int junk UNUSED_PARAM)
487 struct icmp6_hdr *pkt = alloca(datalen + sizeof(struct icmp6_hdr) + 4);
489 //memset(pkt, 0, datalen + sizeof(struct icmp6_hdr) + 4);
490 pkt->icmp6_type = ICMP6_ECHO_REQUEST;
491 /*pkt->icmp6_code = 0;*/
492 /*pkt->icmp6_cksum = 0;*/
493 pkt->icmp6_seq = htons(ntransmitted); /* don't ++ here, it can be a macro */
494 pkt->icmp6_id = myid;
496 /*if (datalen >= 4)*/
497 *(uint32_t*)(&pkt->icmp6_data8[4]) = monotonic_us();
499 //TODO? pkt->icmp_cksum = in_cksum(...);
501 sendping_tail(sendping6, pkt, datalen + sizeof(struct icmp6_hdr));
505 static const char *icmp_type_name(int id)
508 case ICMP_ECHOREPLY: return "Echo Reply";
509 case ICMP_DEST_UNREACH: return "Destination Unreachable";
510 case ICMP_SOURCE_QUENCH: return "Source Quench";
511 case ICMP_REDIRECT: return "Redirect (change route)";
512 case ICMP_ECHO: return "Echo Request";
513 case ICMP_TIME_EXCEEDED: return "Time Exceeded";
514 case ICMP_PARAMETERPROB: return "Parameter Problem";
515 case ICMP_TIMESTAMP: return "Timestamp Request";
516 case ICMP_TIMESTAMPREPLY: return "Timestamp Reply";
517 case ICMP_INFO_REQUEST: return "Information Request";
518 case ICMP_INFO_REPLY: return "Information Reply";
519 case ICMP_ADDRESS: return "Address Mask Request";
520 case ICMP_ADDRESSREPLY: return "Address Mask Reply";
521 default: return "unknown ICMP type";
525 /* RFC3542 changed some definitions from RFC2292 for no good reason, whee!
526 * the newer 3542 uses a MLD_ prefix where as 2292 uses ICMP6_ prefix */
527 #ifndef MLD_LISTENER_QUERY
528 # define MLD_LISTENER_QUERY ICMP6_MEMBERSHIP_QUERY
530 #ifndef MLD_LISTENER_REPORT
531 # define MLD_LISTENER_REPORT ICMP6_MEMBERSHIP_REPORT
533 #ifndef MLD_LISTENER_REDUCTION
534 # define MLD_LISTENER_REDUCTION ICMP6_MEMBERSHIP_REDUCTION
536 static const char *icmp6_type_name(int id)
539 case ICMP6_DST_UNREACH: return "Destination Unreachable";
540 case ICMP6_PACKET_TOO_BIG: return "Packet too big";
541 case ICMP6_TIME_EXCEEDED: return "Time Exceeded";
542 case ICMP6_PARAM_PROB: return "Parameter Problem";
543 case ICMP6_ECHO_REPLY: return "Echo Reply";
544 case ICMP6_ECHO_REQUEST: return "Echo Request";
545 case MLD_LISTENER_QUERY: return "Listener Query";
546 case MLD_LISTENER_REPORT: return "Listener Report";
547 case MLD_LISTENER_REDUCTION: return "Listener Reduction";
548 default: return "unknown ICMP type";
553 static void unpack_tail(int sz, uint32_t *tp,
554 const char *from_str,
555 uint16_t recv_seq, int ttl)
557 const char *dupmsg = " (DUP!)";
558 unsigned triptime = triptime; /* for gcc */
563 /* (int32_t) cast is for hypothetical 64-bit unsigned */
564 /* (doesn't hurt 32-bit real-world anyway) */
565 triptime = (int32_t) ((uint32_t)monotonic_us() - *tp);
573 if (TST(recv_seq % MAX_DUP_CHK)) {
577 SET(recv_seq % MAX_DUP_CHK);
581 if (option_mask32 & OPT_QUIET)
584 printf("%d bytes from %s: seq=%u ttl=%d", sz,
585 from_str, recv_seq, ttl);
587 printf(" time=%u.%03u ms", triptime / 1000, triptime % 1000);
591 static void unpack4(char *buf, int sz, struct sockaddr_in *from)
593 struct icmp *icmppkt;
597 /* discard if too short */
598 if (sz < (datalen + ICMP_MINLEN))
601 /* check IP header */
602 iphdr = (struct iphdr *) buf;
603 hlen = iphdr->ihl << 2;
605 icmppkt = (struct icmp *) (buf + hlen);
606 if (icmppkt->icmp_id != myid)
607 return; /* not our ping */
609 if (icmppkt->icmp_type == ICMP_ECHOREPLY) {
610 uint16_t recv_seq = ntohs(icmppkt->icmp_seq);
613 if (sz >= ICMP_MINLEN + sizeof(uint32_t))
614 tp = (uint32_t *) icmppkt->icmp_data;
616 inet_ntoa(*(struct in_addr *) &from->sin_addr.s_addr),
617 recv_seq, iphdr->ttl);
618 } else if (icmppkt->icmp_type != ICMP_ECHO) {
619 bb_error_msg("warning: got ICMP %d (%s)",
621 icmp_type_name(icmppkt->icmp_type));
625 static void unpack6(char *packet, int sz, /*struct sockaddr_in6 *from,*/ int hoplimit)
627 struct icmp6_hdr *icmppkt;
628 char buf[INET6_ADDRSTRLEN];
630 /* discard if too short */
631 if (sz < (datalen + sizeof(struct icmp6_hdr)))
634 icmppkt = (struct icmp6_hdr *) packet;
635 if (icmppkt->icmp6_id != myid)
636 return; /* not our ping */
638 if (icmppkt->icmp6_type == ICMP6_ECHO_REPLY) {
639 uint16_t recv_seq = ntohs(icmppkt->icmp6_seq);
642 if (sz >= sizeof(struct icmp6_hdr) + sizeof(uint32_t))
643 tp = (uint32_t *) &icmppkt->icmp6_data8[4];
645 inet_ntop(AF_INET6, &pingaddr.sin6.sin6_addr,
648 } else if (icmppkt->icmp6_type != ICMP6_ECHO_REQUEST) {
649 bb_error_msg("warning: got ICMP %d (%s)",
651 icmp6_type_name(icmppkt->icmp6_type));
656 static void ping4(len_and_sockaddr *lsa)
660 pingsock = create_icmp_socket();
661 pingaddr.sin = lsa->u.sin;
663 if (setsockopt(pingsock, IPPROTO_IP, IP_MULTICAST_IF,
664 &source_lsa->u.sa, source_lsa->len))
665 bb_error_msg_and_die("can't set multicast source interface");
666 xbind(pingsock, &source_lsa->u.sa, source_lsa->len);
669 setsockopt_bindtodevice(pingsock, str_I);
671 /* enable broadcast pings */
672 setsockopt_broadcast(pingsock);
674 /* set recv buf (needed if we can get lots of responses: flood ping,
675 * broadcast ping etc) */
676 sockopt = (datalen * 2) + 7 * 1024; /* giving it a bit of extra room */
677 setsockopt(pingsock, SOL_SOCKET, SO_RCVBUF, &sockopt, sizeof(sockopt));
680 setsockopt(pingsock, IPPROTO_IP, IP_TTL, &opt_ttl, sizeof(opt_ttl));
681 /* above doesnt affect packets sent to bcast IP, so... */
682 setsockopt(pingsock, IPPROTO_IP, IP_MULTICAST_TTL, &opt_ttl, sizeof(opt_ttl));
685 signal(SIGINT, print_stats_and_exit);
687 /* start the ping's going ... */
690 /* listen for replies */
692 struct sockaddr_in from;
693 socklen_t fromlen = (socklen_t) sizeof(from);
696 c = recvfrom(pingsock, G.rcv_packet, G.sizeof_rcv_packet, 0,
697 (struct sockaddr *) &from, &fromlen);
700 bb_perror_msg("recvfrom");
703 unpack4(G.rcv_packet, c, &from);
704 if (pingcount && nreceived >= pingcount)
709 extern int BUG_bad_offsetof_icmp6_cksum(void);
710 static void ping6(len_and_sockaddr *lsa)
714 struct sockaddr_in6 from;
716 char control_buf[CMSG_SPACE(36)];
718 pingsock = create_icmp6_socket();
719 pingaddr.sin6 = lsa->u.sin6;
720 /* untested whether "-I addr" really works for IPv6: */
722 xbind(pingsock, &source_lsa->u.sa, source_lsa->len);
724 setsockopt_bindtodevice(pingsock, str_I);
728 struct icmp6_filter filt;
729 if (!(option_mask32 & OPT_VERBOSE)) {
730 ICMP6_FILTER_SETBLOCKALL(&filt);
731 ICMP6_FILTER_SETPASS(ICMP6_ECHO_REPLY, &filt);
733 ICMP6_FILTER_SETPASSALL(&filt);
735 if (setsockopt(pingsock, IPPROTO_ICMPV6, ICMP6_FILTER, &filt,
737 bb_error_msg_and_die("setsockopt(ICMP6_FILTER)");
739 #endif /*ICMP6_FILTER*/
741 /* enable broadcast pings */
742 setsockopt_broadcast(pingsock);
744 /* set recv buf (needed if we can get lots of responses: flood ping,
745 * broadcast ping etc) */
746 sockopt = (datalen * 2) + 7 * 1024; /* giving it a bit of extra room */
747 setsockopt(pingsock, SOL_SOCKET, SO_RCVBUF, &sockopt, sizeof(sockopt));
749 sockopt = offsetof(struct icmp6_hdr, icmp6_cksum);
750 if (offsetof(struct icmp6_hdr, icmp6_cksum) != 2)
751 BUG_bad_offsetof_icmp6_cksum();
752 setsockopt(pingsock, SOL_RAW, IPV6_CHECKSUM, &sockopt, sizeof(sockopt));
754 /* request ttl info to be returned in ancillary data */
755 setsockopt(pingsock, SOL_IPV6, IPV6_HOPLIMIT, &const_int_1, sizeof(const_int_1));
758 pingaddr.sin6.sin6_scope_id = if_index;
760 signal(SIGINT, print_stats_and_exit);
762 /* start the ping's going ... */
765 /* listen for replies */
766 msg.msg_name = &from;
767 msg.msg_namelen = sizeof(from);
770 msg.msg_control = control_buf;
771 iov.iov_base = G.rcv_packet;
772 iov.iov_len = G.sizeof_rcv_packet;
777 msg.msg_controllen = sizeof(control_buf);
779 c = recvmsg(pingsock, &msg, 0);
782 bb_perror_msg("recvfrom");
785 for (mp = CMSG_FIRSTHDR(&msg); mp; mp = CMSG_NXTHDR(&msg, mp)) {
786 if (mp->cmsg_level == SOL_IPV6
787 && mp->cmsg_type == IPV6_HOPLIMIT
788 /* don't check len - we trust the kernel: */
789 /* && mp->cmsg_len >= CMSG_LEN(sizeof(int)) */
791 /*hoplimit = *(int*)CMSG_DATA(mp); - unaligned access */
792 move_from_unaligned_int(hoplimit, CMSG_DATA(mp));
795 unpack6(G.rcv_packet, c, /*&from,*/ hoplimit);
796 if (pingcount && nreceived >= pingcount)
802 static void ping(len_and_sockaddr *lsa)
804 printf("PING %s (%s)", hostname, dotted);
807 xmalloc_sockaddr2dotted_noport(&source_lsa->u.sa));
809 printf(": %d data bytes\n", datalen);
811 G.sizeof_rcv_packet = datalen + MAXIPLEN + MAXICMPLEN;
812 G.rcv_packet = xzalloc(G.sizeof_rcv_packet);
814 if (lsa->u.sa.sa_family == AF_INET6) {
815 /* +4 reserves a place for timestamp, which may end up sitting
816 * _after_ packet. Saves one if() - see sendping4/6() */
817 G.snd_packet = xzalloc(datalen + sizeof(struct icmp6_hdr) + 4);
822 G.snd_packet = xzalloc(datalen + ICMP_MINLEN + 4);
827 static int common_ping_main(int opt, char **argv)
829 len_and_sockaddr *lsa;
834 /* exactly one argument needed; -v and -q don't mix; -c NUM, -t NUM, -w NUM, -W NUM */
835 opt_complementary = "=1:q--v:v--q:c+:t+:w+:W+";
836 opt |= getopt32(argv, OPT_STRING, &pingcount, &str_s, &opt_ttl, &deadline, &timeout, &str_I);
838 datalen = xatou16(str_s); // -s
839 if (opt & OPT_I) { // -I
840 if_index = if_nametoindex(str_I);
842 /* TODO: I'm not sure it takes IPv6 unless in [XX:XX..] format */
843 source_lsa = xdotted2sockaddr(str_I, 0);
844 str_I = NULL; /* don't try to bind to device later */
847 myid = (uint16_t) getpid();
848 hostname = argv[optind];
851 sa_family_t af = AF_UNSPEC;
856 lsa = xhost_and_af2sockaddr(hostname, 0, af);
859 lsa = xhost_and_af2sockaddr(hostname, 0, AF_INET);
862 if (source_lsa && source_lsa->u.sa.sa_family != lsa->u.sa.sa_family)
863 /* leaking it here... */
866 dotted = xmalloc_sockaddr2dotted_noport(&lsa->u.sa);
868 print_stats_and_exit(EXIT_SUCCESS);
869 /*return EXIT_SUCCESS;*/
871 #endif /* FEATURE_FANCY_PING */
874 int ping_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
875 int ping_main(int argc UNUSED_PARAM, char **argv)
877 #if !ENABLE_FEATURE_FANCY_PING
878 return common_ping_main(AF_UNSPEC, argv);
880 return common_ping_main(0, argv);
885 int ping6_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
886 int ping6_main(int argc UNUSED_PARAM, char **argv)
888 # if !ENABLE_FEATURE_FANCY_PING
889 return common_ping_main(AF_INET6, argv);
891 return common_ping_main(OPT_IPV6, argv);
897 * Copyright (c) 1989 The Regents of the University of California.
898 * All rights reserved.
900 * This code is derived from software contributed to Berkeley by
903 * Redistribution and use in source and binary forms, with or without
904 * modification, are permitted provided that the following conditions
906 * 1. Redistributions of source code must retain the above copyright
907 * notice, this list of conditions and the following disclaimer.
908 * 2. Redistributions in binary form must reproduce the above copyright
909 * notice, this list of conditions and the following disclaimer in the
910 * documentation and/or other materials provided with the distribution.
912 * 3. <BSD Advertising Clause omitted per the July 22, 1999 licensing change
913 * ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change>
915 * 4. Neither the name of the University nor the names of its contributors
916 * may be used to endorse or promote products derived from this software
917 * without specific prior written permission.
919 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
920 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
921 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
922 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
923 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
924 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
925 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
926 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
927 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
928 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF