source: MondoRescue/branches/2.2.5/mindi-busybox/networking/ping.c@ 1765

Last change on this file since 1765 was 1765, checked in by Bruno Cornec, 16 years ago

Update to busybox 1.7.2
File size: 20.4 KB
Line 
1/* vi: set sw=4 ts=4: */
2/*
3 * Mini ping implementation for busybox
4 *
5 * Copyright (C) 1999 by Randolph Chung <tausq@debian.org>
6 *
7 * Adapted from the ping in netkit-base 0.10:
8 * Copyright (c) 1989 The Regents of the University of California.
9 * All rights reserved.
10 *
11 * This code is derived from software contributed to Berkeley by
12 * Mike Muuss.
13 *
14 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
15 */
16/* from ping6.c:
17 * Copyright (C) 1999 by Randolph Chung <tausq@debian.org>
18 *
19 * This version of ping is adapted from the ping in netkit-base 0.10,
20 * which is:
21 *
22 * Original copyright notice is retained at the end of this file.
23 *
24 * This version is an adaptation of ping.c from busybox.
25 * The code was modified by Bart Visscher <magick@linux-fan.com>
26 */
27
28#include <net/if.h>
29#include <netinet/ip_icmp.h>
30#include "libbb.h"
31
32#if ENABLE_PING6
33#include <netinet/icmp6.h>
34/* I see RENUMBERED constants in bits/in.h - !!?
35 * What a fuck is going on with libc? Is it a glibc joke? */
36#ifdef IPV6_2292HOPLIMIT
37#undef IPV6_HOPLIMIT
38#define IPV6_HOPLIMIT IPV6_2292HOPLIMIT
39#endif
40#endif
41
42enum {
43 DEFDATALEN = 56,
44 MAXIPLEN = 60,
45 MAXICMPLEN = 76,
46 MAXPACKET = 65468,
47 MAX_DUP_CHK = (8 * 128),
48 MAXWAIT = 10,
49 PINGINTERVAL = 1, /* 1 second */
50};
51
52/* common routines */
53
54static int in_cksum(unsigned short *buf, int sz)
55{
56 int nleft = sz;
57 int sum = 0;
58 unsigned short *w = buf;
59 unsigned short ans = 0;
60
61 while (nleft > 1) {
62 sum += *w++;
63 nleft -= 2;
64 }
65
66 if (nleft == 1) {
67 *(unsigned char *) (&ans) = *(unsigned char *) w;
68 sum += ans;
69 }
70
71 sum = (sum >> 16) + (sum & 0xFFFF);
72 sum += (sum >> 16);
73 ans = ~sum;
74 return ans;
75}
76
77#if !ENABLE_FEATURE_FANCY_PING
78
79/* simple version */
80
81static char *hostname;
82
83static void noresp(int ign ATTRIBUTE_UNUSED)
84{
85 printf("No response from %s\n", hostname);
86 exit(EXIT_FAILURE);
87}
88
89static void ping4(len_and_sockaddr *lsa)
90{
91 struct sockaddr_in pingaddr;
92 struct icmp *pkt;
93 int pingsock, c;
94 char packet[DEFDATALEN + MAXIPLEN + MAXICMPLEN];
95
96 pingsock = create_icmp_socket();
97 pingaddr = lsa->sin;
98
99 pkt = (struct icmp *) packet;
100 memset(pkt, 0, sizeof(packet));
101 pkt->icmp_type = ICMP_ECHO;
102 pkt->icmp_cksum = in_cksum((unsigned short *) pkt, sizeof(packet));
103
104 c = xsendto(pingsock, packet, DEFDATALEN + ICMP_MINLEN,
105 (struct sockaddr *) &pingaddr, sizeof(pingaddr));
106
107 /* listen for replies */
108 while (1) {
109 struct sockaddr_in from;
110 socklen_t fromlen = sizeof(from);
111
112 c = recvfrom(pingsock, packet, sizeof(packet), 0,
113 (struct sockaddr *) &from, &fromlen);
114 if (c < 0) {
115 if (errno != EINTR)
116 bb_perror_msg("recvfrom");
117 continue;
118 }
119 if (c >= 76) { /* ip + icmp */
120 struct iphdr *iphdr = (struct iphdr *) packet;
121
122 pkt = (struct icmp *) (packet + (iphdr->ihl << 2)); /* skip ip hdr */
123 if (pkt->icmp_type == ICMP_ECHOREPLY)
124 break;
125 }
126 }
127 if (ENABLE_FEATURE_CLEAN_UP)
128 close(pingsock);
129}
130
131#if ENABLE_PING6
132static void ping6(len_and_sockaddr *lsa)
133{
134 struct sockaddr_in6 pingaddr;
135 struct icmp6_hdr *pkt;
136 int pingsock, c;
137 int sockopt;
138 char packet[DEFDATALEN + MAXIPLEN + MAXICMPLEN];
139
140 pingsock = create_icmp6_socket();
141 pingaddr = lsa->sin6;
142
143 pkt = (struct icmp6_hdr *) packet;
144 memset(pkt, 0, sizeof(packet));
145 pkt->icmp6_type = ICMP6_ECHO_REQUEST;
146
147 sockopt = offsetof(struct icmp6_hdr, icmp6_cksum);
148 setsockopt(pingsock, SOL_RAW, IPV6_CHECKSUM, &sockopt, sizeof(sockopt));
149
150 c = xsendto(pingsock, packet, DEFDATALEN + sizeof (struct icmp6_hdr),
151 (struct sockaddr *) &pingaddr, sizeof(pingaddr));
152
153 /* listen for replies */
154 while (1) {
155 struct sockaddr_in6 from;
156 socklen_t fromlen = sizeof(from);
157
158 c = recvfrom(pingsock, packet, sizeof(packet), 0,
159 (struct sockaddr *) &from, &fromlen);
160 if (c < 0) {
161 if (errno != EINTR)
162 bb_perror_msg("recvfrom");
163 continue;
164 }
165 if (c >= 8) { /* icmp6_hdr */
166 pkt = (struct icmp6_hdr *) packet;
167 if (pkt->icmp6_type == ICMP6_ECHO_REPLY)
168 break;
169 }
170 }
171 if (ENABLE_FEATURE_CLEAN_UP)
172 close(pingsock);
173}
174#endif
175
176int ping_main(int argc, char **argv);
177int ping_main(int argc, char **argv)
178{
179 len_and_sockaddr *lsa;
180#if ENABLE_PING6
181 sa_family_t af = AF_UNSPEC;
182
183 while ((++argv)[0] && argv[0][0] == '-') {
184 if (argv[0][1] == '4') {
185 af = AF_INET;
186 continue;
187 }
188 if (argv[0][1] == '6') {
189 af = AF_INET6;
190 continue;
191 }
192 bb_show_usage();
193 }
194#else
195 argv++;
196#endif
197
198 hostname = *argv;
199 if (!hostname)
200 bb_show_usage();
201
202#if ENABLE_PING6
203 lsa = xhost_and_af2sockaddr(hostname, 0, af);
204#else
205 lsa = xhost_and_af2sockaddr(hostname, 0, AF_INET);
206#endif
207 /* Set timer _after_ DNS resolution */
208 signal(SIGALRM, noresp);
209 alarm(5); /* give the host 5000ms to respond */
210
211#if ENABLE_PING6
212 if (lsa->sa.sa_family == AF_INET6)
213 ping6(lsa);
214 else
215#endif
216 ping4(lsa);
217 printf("%s is alive!\n", hostname);
218 return EXIT_SUCCESS;
219}
220
221
222#else /* FEATURE_FANCY_PING */
223
224
225/* full(er) version */
226
227#define OPT_STRING ("qvc:s:I:4" USE_PING6("6"))
228enum {
229 OPT_QUIET = 1 << 0,
230 OPT_VERBOSE = 1 << 1,
231 OPT_c = 1 << 2,
232 OPT_s = 1 << 3,
233 OPT_I = 1 << 4,
234 OPT_IPV4 = 1 << 5,
235 OPT_IPV6 = (1 << 6) * ENABLE_PING6,
236};
237
238
239struct globals {
240 int pingsock;
241 len_and_sockaddr *source_lsa;
242 unsigned datalen;
243 int if_index;
244 unsigned long ntransmitted, nreceived, nrepeats, pingcount;
245 uint16_t myid;
246 unsigned tmin, tmax; /* in us */
247 unsigned long long tsum; /* in us, sum of all times */
248 const char *hostname;
249 const char *dotted;
250 union {
251 struct sockaddr sa;
252 struct sockaddr_in sin;
253#if ENABLE_PING6
254 struct sockaddr_in6 sin6;
255#endif
256 } pingaddr;
257 char rcvd_tbl[MAX_DUP_CHK / 8];
258};
259#define G (*(struct globals*)&bb_common_bufsiz1)
260#define pingsock (G.pingsock )
261#define source_lsa (G.source_lsa )
262#define datalen (G.datalen )
263#define if_index (G.if_index )
264#define ntransmitted (G.ntransmitted)
265#define nreceived (G.nreceived )
266#define nrepeats (G.nrepeats )
267#define pingcount (G.pingcount )
268#define myid (G.myid )
269#define tmin (G.tmin )
270#define tmax (G.tmax )
271#define tsum (G.tsum )
272#define hostname (G.hostname )
273#define dotted (G.dotted )
274#define pingaddr (G.pingaddr )
275#define rcvd_tbl (G.rcvd_tbl )
276void BUG_ping_globals_too_big(void);
277#define INIT_G() do { \
278 if (sizeof(G) > COMMON_BUFSIZE) \
279 BUG_ping_globals_too_big(); \
280 pingsock = -1; \
281 tmin = UINT_MAX; \
282} while (0)
283
284
285#define A(bit) rcvd_tbl[(bit)>>3] /* identify byte in array */
286#define B(bit) (1 << ((bit) & 0x07)) /* identify bit in byte */
287#define SET(bit) (A(bit) |= B(bit))
288#define CLR(bit) (A(bit) &= (~B(bit)))
289#define TST(bit) (A(bit) & B(bit))
290
291/**************************************************************************/
292
293static void pingstats(int junk ATTRIBUTE_UNUSED)
294{
295 signal(SIGINT, SIG_IGN);
296
297 printf("\n--- %s ping statistics ---\n", hostname);
298 printf("%lu packets transmitted, ", ntransmitted);
299 printf("%lu packets received, ", nreceived);
300 if (nrepeats)
301 printf("%lu duplicates, ", nrepeats);
302 if (ntransmitted)
303 ntransmitted = (ntransmitted - nreceived) * 100 / ntransmitted;
304 printf("%lu%% packet loss\n", ntransmitted);
305 if (tmin != UINT_MAX) {
306 unsigned tavg = tsum / (nreceived + nrepeats);
307 printf("round-trip min/avg/max = %u.%03u/%u.%03u/%u.%03u ms\n",
308 tmin / 1000, tmin % 1000,
309 tavg / 1000, tavg % 1000,
310 tmax / 1000, tmax % 1000);
311 }
312 exit(nreceived == 0); /* (nreceived == 0) is true (1) -- 'failure' */
313}
314
315static void sendping_tail(void (*sp)(int), const void *pkt, int size_pkt)
316{
317 int sz;
318
319 CLR((uint16_t)ntransmitted % MAX_DUP_CHK);
320 ntransmitted++;
321
322 /* sizeof(pingaddr) can be larger than real sa size, but I think
323 * it doesn't matter */
324 sz = xsendto(pingsock, pkt, size_pkt, &pingaddr.sa, sizeof(pingaddr));
325 if (sz != size_pkt)
326 bb_error_msg_and_die(bb_msg_write_error);
327
328 signal(SIGALRM, sp);
329 if (pingcount == 0 || ntransmitted < pingcount) { /* schedule next in 1s */
330 alarm(PINGINTERVAL);
331 } else { /* done, wait for the last ping to come back */
332 /* todo, don't necessarily need to wait so long... */
333 signal(SIGALRM, pingstats);
334 alarm(MAXWAIT);
335 }
336}
337
338static void sendping4(int junk ATTRIBUTE_UNUSED)
339{
340 /* +4 reserves a place for timestamp, which may end up sitting
341 * *after* packet. Saves one if() */
342 struct icmp *pkt = alloca(datalen + ICMP_MINLEN + 4);
343
344 pkt->icmp_type = ICMP_ECHO;
345 pkt->icmp_code = 0;
346 pkt->icmp_cksum = 0;
347 pkt->icmp_seq = htons(ntransmitted); /* don't ++ here, it can be a macro */
348 pkt->icmp_id = myid;
349
350 /* We don't do hton, because we will read it back on the same machine */
351 /*if (datalen >= 4)*/
352 *(uint32_t*)&pkt->icmp_dun = monotonic_us();
353
354 pkt->icmp_cksum = in_cksum((unsigned short *) pkt, datalen + ICMP_MINLEN);
355
356 sendping_tail(sendping4, pkt, datalen + ICMP_MINLEN);
357}
358#if ENABLE_PING6
359static void sendping6(int junk ATTRIBUTE_UNUSED)
360{
361 struct icmp6_hdr *pkt = alloca(datalen + sizeof(struct icmp6_hdr) + 4);
362
363 pkt->icmp6_type = ICMP6_ECHO_REQUEST;
364 pkt->icmp6_code = 0;
365 pkt->icmp6_cksum = 0;
366 pkt->icmp6_seq = htons(ntransmitted); /* don't ++ here, it can be a macro */
367 pkt->icmp6_id = myid;
368
369 /*if (datalen >= 4)*/
370 *(uint32_t*)(&pkt->icmp6_data8[4]) = monotonic_us();
371
372 sendping_tail(sendping6, pkt, datalen + sizeof(struct icmp6_hdr));
373}
374#endif
375
376static const char *icmp_type_name(int id)
377{
378 switch (id) {
379 case ICMP_ECHOREPLY: return "Echo Reply";
380 case ICMP_DEST_UNREACH: return "Destination Unreachable";
381 case ICMP_SOURCE_QUENCH: return "Source Quench";
382 case ICMP_REDIRECT: return "Redirect (change route)";
383 case ICMP_ECHO: return "Echo Request";
384 case ICMP_TIME_EXCEEDED: return "Time Exceeded";
385 case ICMP_PARAMETERPROB: return "Parameter Problem";
386 case ICMP_TIMESTAMP: return "Timestamp Request";
387 case ICMP_TIMESTAMPREPLY: return "Timestamp Reply";
388 case ICMP_INFO_REQUEST: return "Information Request";
389 case ICMP_INFO_REPLY: return "Information Reply";
390 case ICMP_ADDRESS: return "Address Mask Request";
391 case ICMP_ADDRESSREPLY: return "Address Mask Reply";
392 default: return "unknown ICMP type";
393 }
394}
395#if ENABLE_PING6
396/* RFC3542 changed some definitions from RFC2292 for no good reason, whee!
397 * the newer 3542 uses a MLD_ prefix where as 2292 uses ICMP6_ prefix */
398#ifndef MLD_LISTENER_QUERY
399# define MLD_LISTENER_QUERY ICMP6_MEMBERSHIP_QUERY
400#endif
401#ifndef MLD_LISTENER_REPORT
402# define MLD_LISTENER_REPORT ICMP6_MEMBERSHIP_REPORT
403#endif
404#ifndef MLD_LISTENER_REDUCTION
405# define MLD_LISTENER_REDUCTION ICMP6_MEMBERSHIP_REDUCTION
406#endif
407static const char *icmp6_type_name(int id)
408{
409 switch (id) {
410 case ICMP6_DST_UNREACH: return "Destination Unreachable";
411 case ICMP6_PACKET_TOO_BIG: return "Packet too big";
412 case ICMP6_TIME_EXCEEDED: return "Time Exceeded";
413 case ICMP6_PARAM_PROB: return "Parameter Problem";
414 case ICMP6_ECHO_REPLY: return "Echo Reply";
415 case ICMP6_ECHO_REQUEST: return "Echo Request";
416 case MLD_LISTENER_QUERY: return "Listener Query";
417 case MLD_LISTENER_REPORT: return "Listener Report";
418 case MLD_LISTENER_REDUCTION: return "Listener Reduction";
419 default: return "unknown ICMP type";
420 }
421}
422#endif
423
424static void unpack_tail(int sz, uint32_t *tp,
425 const char *from_str,
426 uint16_t recv_seq, int ttl)
427{
428 const char *dupmsg = " (DUP!)";
429 unsigned triptime = triptime; /* for gcc */
430
431 ++nreceived;
432
433 if (tp) {
434 /* (int32_t) cast is for hypothetical 64-bit unsigned */
435 /* (doesn't hurt 32-bit real-world anyway) */
436 triptime = (int32_t) ((uint32_t)monotonic_us() - *tp);
437 tsum += triptime;
438 if (triptime < tmin)
439 tmin = triptime;
440 if (triptime > tmax)
441 tmax = triptime;
442 }
443
444 if (TST(recv_seq % MAX_DUP_CHK)) {
445 ++nrepeats;
446 --nreceived;
447 } else {
448 SET(recv_seq % MAX_DUP_CHK);
449 dupmsg += 7;
450 }
451
452 if (option_mask32 & OPT_QUIET)
453 return;
454
455 printf("%d bytes from %s: seq=%u ttl=%d", sz,
456 from_str, recv_seq, ttl);
457 if (tp)
458 printf(" time=%u.%03u ms", triptime / 1000, triptime % 1000);
459 puts(dupmsg);
460 fflush(stdout);
461}
462static void unpack4(char *buf, int sz, struct sockaddr_in *from)
463{
464 struct icmp *icmppkt;
465 struct iphdr *iphdr;
466 int hlen;
467
468 /* discard if too short */
469 if (sz < (datalen + ICMP_MINLEN))
470 return;
471
472 /* check IP header */
473 iphdr = (struct iphdr *) buf;
474 hlen = iphdr->ihl << 2;
475 sz -= hlen;
476 icmppkt = (struct icmp *) (buf + hlen);
477 if (icmppkt->icmp_id != myid)
478 return; /* not our ping */
479
480 if (icmppkt->icmp_type == ICMP_ECHOREPLY) {
481 uint16_t recv_seq = ntohs(icmppkt->icmp_seq);
482 uint32_t *tp = NULL;
483
484 if (sz >= ICMP_MINLEN + sizeof(uint32_t))
485 tp = (uint32_t *) icmppkt->icmp_data;
486 unpack_tail(sz, tp,
487 inet_ntoa(*(struct in_addr *) &from->sin_addr.s_addr),
488 recv_seq, iphdr->ttl);
489 } else if (icmppkt->icmp_type != ICMP_ECHO) {
490 bb_error_msg("warning: got ICMP %d (%s)",
491 icmppkt->icmp_type,
492 icmp_type_name(icmppkt->icmp_type));
493 }
494}
495#if ENABLE_PING6
496static void unpack6(char *packet, int sz, struct sockaddr_in6 *from, int hoplimit)
497{
498 struct icmp6_hdr *icmppkt;
499 char buf[INET6_ADDRSTRLEN];
500
501 /* discard if too short */
502 if (sz < (datalen + sizeof(struct icmp6_hdr)))
503 return;
504
505 icmppkt = (struct icmp6_hdr *) packet;
506 if (icmppkt->icmp6_id != myid)
507 return; /* not our ping */
508
509 if (icmppkt->icmp6_type == ICMP6_ECHO_REPLY) {
510 uint16_t recv_seq = ntohs(icmppkt->icmp6_seq);
511 uint32_t *tp = NULL;
512
513 if (sz >= sizeof(struct icmp6_hdr) + sizeof(uint32_t))
514 tp = (uint32_t *) &icmppkt->icmp6_data8[4];
515 unpack_tail(sz, tp,
516 inet_ntop(AF_INET6, &pingaddr.sin6.sin6_addr,
517 buf, sizeof(buf)),
518 recv_seq, hoplimit);
519 } else if (icmppkt->icmp6_type != ICMP6_ECHO_REQUEST) {
520 bb_error_msg("warning: got ICMP %d (%s)",
521 icmppkt->icmp6_type,
522 icmp6_type_name(icmppkt->icmp6_type));
523 }
524}
525#endif
526
527static void ping4(len_and_sockaddr *lsa)
528{
529 char packet[datalen + MAXIPLEN + MAXICMPLEN];
530 int sockopt;
531
532 pingsock = create_icmp_socket();
533 pingaddr.sin = lsa->sin;
534 if (source_lsa) {
535 if (setsockopt(pingsock, IPPROTO_IP, IP_MULTICAST_IF,
536 &source_lsa->sa, source_lsa->len))
537 bb_error_msg_and_die("can't set multicast source interface");
538 xbind(pingsock, &source_lsa->sa, source_lsa->len);
539 }
540
541 /* enable broadcast pings */
542 setsockopt_broadcast(pingsock);
543
544 /* set recv buf for broadcast pings */
545 sockopt = 48 * 1024; /* explain why 48k? */
546 setsockopt(pingsock, SOL_SOCKET, SO_RCVBUF, &sockopt, sizeof(sockopt));
547
548 signal(SIGINT, pingstats);
549
550 /* start the ping's going ... */
551 sendping4(0);
552
553 /* listen for replies */
554 while (1) {
555 struct sockaddr_in from;
556 socklen_t fromlen = (socklen_t) sizeof(from);
557 int c;
558
559 c = recvfrom(pingsock, packet, sizeof(packet), 0,
560 (struct sockaddr *) &from, &fromlen);
561 if (c < 0) {
562 if (errno != EINTR)
563 bb_perror_msg("recvfrom");
564 continue;
565 }
566 unpack4(packet, c, &from);
567 if (pingcount > 0 && nreceived >= pingcount)
568 break;
569 }
570}
571#if ENABLE_PING6
572extern int BUG_bad_offsetof_icmp6_cksum(void);
573static void ping6(len_and_sockaddr *lsa)
574{
575 char packet[datalen + MAXIPLEN + MAXICMPLEN];
576 int sockopt;
577 struct msghdr msg;
578 struct sockaddr_in6 from;
579 struct iovec iov;
580 char control_buf[CMSG_SPACE(36)];
581
582 pingsock = create_icmp6_socket();
583 pingaddr.sin6 = lsa->sin6;
584 /* untested whether "-I addr" really works for IPv6: */
585 if (source_lsa)
586 xbind(pingsock, &source_lsa->sa, source_lsa->len);
587
588#ifdef ICMP6_FILTER
589 {
590 struct icmp6_filter filt;
591 if (!(option_mask32 & OPT_VERBOSE)) {
592 ICMP6_FILTER_SETBLOCKALL(&filt);
593 ICMP6_FILTER_SETPASS(ICMP6_ECHO_REPLY, &filt);
594 } else {
595 ICMP6_FILTER_SETPASSALL(&filt);
596 }
597 if (setsockopt(pingsock, IPPROTO_ICMPV6, ICMP6_FILTER, &filt,
598 sizeof(filt)) < 0)
599 bb_error_msg_and_die("setsockopt(ICMP6_FILTER)");
600 }
601#endif /*ICMP6_FILTER*/
602
603 /* enable broadcast pings */
604 setsockopt_broadcast(pingsock);
605
606 /* set recv buf for broadcast pings */
607 sockopt = 48 * 1024; /* explain why 48k? */
608 setsockopt(pingsock, SOL_SOCKET, SO_RCVBUF, &sockopt, sizeof(sockopt));
609
610 sockopt = offsetof(struct icmp6_hdr, icmp6_cksum);
611 if (offsetof(struct icmp6_hdr, icmp6_cksum) != 2)
612 BUG_bad_offsetof_icmp6_cksum();
613 setsockopt(pingsock, SOL_RAW, IPV6_CHECKSUM, &sockopt, sizeof(sockopt));
614
615 /* request ttl info to be returned in ancillary data */
616 setsockopt(pingsock, SOL_IPV6, IPV6_HOPLIMIT, &const_int_1, sizeof(const_int_1));
617
618 if (if_index)
619 pingaddr.sin6.sin6_scope_id = if_index;
620
621 signal(SIGINT, pingstats);
622
623 /* start the ping's going ... */
624 sendping6(0);
625
626 /* listen for replies */
627 msg.msg_name = &from;
628 msg.msg_namelen = sizeof(from);
629 msg.msg_iov = &iov;
630 msg.msg_iovlen = 1;
631 msg.msg_control = control_buf;
632 iov.iov_base = packet;
633 iov.iov_len = sizeof(packet);
634 while (1) {
635 int c;
636 struct cmsghdr *mp;
637 int hoplimit = -1;
638 msg.msg_controllen = sizeof(control_buf);
639
640 c = recvmsg(pingsock, &msg, 0);
641 if (c < 0) {
642 if (errno != EINTR)
643 bb_perror_msg("recvfrom");
644 continue;
645 }
646 for (mp = CMSG_FIRSTHDR(&msg); mp; mp = CMSG_NXTHDR(&msg, mp)) {
647 if (mp->cmsg_level == SOL_IPV6
648 && mp->cmsg_type == IPV6_HOPLIMIT
649 /* don't check len - we trust the kernel: */
650 /* && mp->cmsg_len >= CMSG_LEN(sizeof(int)) */
651 ) {
652 hoplimit = *(int*)CMSG_DATA(mp);
653 }
654 }
655 unpack6(packet, c, &from, hoplimit);
656 if (pingcount > 0 && nreceived >= pingcount)
657 break;
658 }
659}
660#endif
661
662static void ping(len_and_sockaddr *lsa)
663{
664 printf("PING %s (%s)", hostname, dotted);
665 if (source_lsa) {
666 printf(" from %s",
667 xmalloc_sockaddr2dotted_noport(&source_lsa->sa));
668 }
669 printf(": %d data bytes\n", datalen);
670
671#if ENABLE_PING6
672 if (lsa->sa.sa_family == AF_INET6)
673 ping6(lsa);
674 else
675#endif
676 ping4(lsa);
677}
678
679int ping_main(int argc, char **argv);
680int ping_main(int argc, char **argv)
681{
682 len_and_sockaddr *lsa;
683 char *opt_c, *opt_s, *opt_I;
684 USE_PING6(sa_family_t af = AF_UNSPEC;)
685
686 INIT_G();
687
688 datalen = DEFDATALEN; /* initialized here rather than in global scope to work around gcc bug */
689
690 /* exactly one argument needed, -v and -q don't mix */
691 opt_complementary = "=1:q--v:v--q";
692 getopt32(argv, OPT_STRING, &opt_c, &opt_s, &opt_I);
693 if (option_mask32 & OPT_c) pingcount = xatoul(opt_c); // -c
694 if (option_mask32 & OPT_s) datalen = xatou16(opt_s); // -s
695 if (option_mask32 & OPT_I) { // -I
696 if_index = if_nametoindex(opt_I);
697 if (!if_index) {
698 /* TODO: I'm not sure it takes IPv6 unless in [XX:XX..] format */
699 source_lsa = xdotted2sockaddr(opt_I, 0);
700 }
701 }
702 myid = (uint16_t) getpid();
703 hostname = argv[optind];
704#if ENABLE_PING6
705 if (option_mask32 & OPT_IPV4)
706 af = AF_INET;
707 if (option_mask32 & OPT_IPV6)
708 af = AF_INET6;
709 lsa = xhost_and_af2sockaddr(hostname, 0, af);
710#else
711 lsa = xhost_and_af2sockaddr(hostname, 0, AF_INET);
712#endif
713
714 if (source_lsa && source_lsa->sa.sa_family != lsa->sa.sa_family)
715 /* leaking it here... */
716 source_lsa = NULL;
717
718 dotted = xmalloc_sockaddr2dotted_noport(&lsa->sa);
719 ping(lsa);
720 pingstats(0);
721 return EXIT_SUCCESS;
722}
723#endif /* FEATURE_FANCY_PING */
724
725
726#if ENABLE_PING6
727int ping6_main(int argc, char **argv);
728int ping6_main(int argc, char **argv)
729{
730 argv[0] = (char*)"-6";
731 return ping_main(argc + 1, argv - 1);
732}
733#endif
734
735/* from ping6.c:
736 * Copyright (c) 1989 The Regents of the University of California.
737 * All rights reserved.
738 *
739 * This code is derived from software contributed to Berkeley by
740 * Mike Muuss.
741 *
742 * Redistribution and use in source and binary forms, with or without
743 * modification, are permitted provided that the following conditions
744 * are met:
745 * 1. Redistributions of source code must retain the above copyright
746 * notice, this list of conditions and the following disclaimer.
747 * 2. Redistributions in binary form must reproduce the above copyright
748 * notice, this list of conditions and the following disclaimer in the
749 * documentation and/or other materials provided with the distribution.
750 *
751 * 3. <BSD Advertising Clause omitted per the July 22, 1999 licensing change
752 * ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change>
753 *
754 * 4. Neither the name of the University nor the names of its contributors
755 * may be used to endorse or promote products derived from this software
756 * without specific prior written permission.
757 *
758 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
759 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
760 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
761 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
762 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
763 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
764 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
765 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
766 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
767 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
768 * SUCH DAMAGE.
769 */
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