1 /* vi: set sw=4 ts=4: */
3 * $Id: ping6.c,v 1.6 2004/03/15 08:28:48 andersen Exp $
4 * Mini ping implementation for busybox
6 * Copyright (C) 1999 by Randolph Chung <tausq@debian.org>
8 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
10 * This version of ping is adapted from the ping in netkit-base 0.10,
13 * Copyright (c) 1989 The Regents of the University of California.
14 * All rights reserved.
16 * This code is derived from software contributed to Berkeley by
19 * Original copyright notice is retained at the end of this file.
21 * This version is an adaptation of ping.c from busybox.
22 * The code was modified by Bart Visscher <magick@linux-fan.com>
25 #include <sys/param.h>
26 #include <sys/socket.h>
28 #include <sys/times.h>
31 #include <netinet/in.h>
32 #include <netinet/ip6.h>
33 #include <netinet/icmp6.h>
34 #include <arpa/inet.h>
43 #include <stddef.h> /* offsetof */
51 MAX_DUP_CHK = (8 * 128),
53 PINGINTERVAL = 1 /* second */
56 #define O_QUIET (1 << 0)
57 #define O_VERBOSE (1 << 1)
59 #define A(bit) rcvd_tbl[(bit)>>3] /* identify byte in array */
60 #define B(bit) (1 << ((bit) & 0x07)) /* identify bit in byte */
61 #define SET(bit) (A(bit) |= B(bit))
62 #define CLR(bit) (A(bit) &= (~B(bit)))
63 #define TST(bit) (A(bit) & B(bit))
65 static void ping(const char *host);
68 #ifndef CONFIG_FEATURE_FANCY_PING6
69 static struct hostent *h;
71 static void noresp(int ign)
73 printf("No response from %s\n", h->h_name);
77 static void ping(const char *host)
79 struct sockaddr_in6 pingaddr;
80 struct icmp6_hdr *pkt;
83 char packet[DEFDATALEN + MAXIPLEN + MAXICMPLEN];
85 pingsock = create_icmp6_socket();
87 memset(&pingaddr, 0, sizeof(struct sockaddr_in));
89 pingaddr.sin6_family = AF_INET6;
90 h = xgethostbyname2(host, AF_INET6);
91 memcpy(&pingaddr.sin6_addr, h->h_addr, sizeof(pingaddr.sin6_addr));
93 pkt = (struct icmp6_hdr *) packet;
94 memset(pkt, 0, sizeof(packet));
95 pkt->icmp6_type = ICMP6_ECHO_REQUEST;
97 sockopt = offsetof(struct icmp6_hdr, icmp6_cksum);
98 setsockopt(pingsock, SOL_RAW, IPV6_CHECKSUM, (char *) &sockopt,
101 c = sendto(pingsock, packet, DEFDATALEN + sizeof (struct icmp6_hdr), 0,
102 (struct sockaddr *) &pingaddr, sizeof(struct sockaddr_in6));
104 if (c < 0 || c != sizeof(packet)) {
105 if (ENABLE_FEATURE_CLEAN_UP) close(pingsock);
106 bb_perror_msg_and_die("sendto");
109 signal(SIGALRM, noresp);
110 alarm(5); /* give the host 5000ms to respond */
111 /* listen for replies */
113 struct sockaddr_in6 from;
114 size_t fromlen = sizeof(from);
116 if ((c = recvfrom(pingsock, packet, sizeof(packet), 0,
117 (struct sockaddr *) &from, &fromlen)) < 0) {
120 bb_perror_msg("recvfrom");
123 if (c >= 8) { /* icmp6_hdr */
124 pkt = (struct icmp6_hdr *) packet;
125 if (pkt->icmp6_type == ICMP6_ECHO_REPLY)
129 if (ENABLE_FEATURE_CLEAN_UP) close(pingsock);
130 printf("%s is alive!\n", h->h_name);
134 int ping6_main(int argc, char **argv)
144 #else /* ! CONFIG_FEATURE_FANCY_PING6 */
145 /* full(er) version */
146 static struct sockaddr_in6 pingaddr;
147 static int pingsock = -1;
148 static unsigned datalen; /* intentionally uninitialized to work around gcc bug */
151 static unsigned long ntransmitted, nreceived, nrepeats, pingcount;
152 static int myid, options;
153 static unsigned long tmin = ULONG_MAX, tmax, tsum;
154 static char rcvd_tbl[MAX_DUP_CHK / 8];
156 static struct hostent *hostent;
158 static void sendping(int);
159 static void pingstats(int);
160 static void unpack(char *, int, struct sockaddr_in6 *, int);
162 /**************************************************************************/
164 static void pingstats(int junk)
168 signal(SIGINT, SIG_IGN);
170 printf("\n--- %s ping statistics ---\n", hostent->h_name);
171 printf("%lu packets transmitted, ", ntransmitted);
172 printf("%lu packets received, ", nreceived);
174 printf("%lu duplicates, ", nrepeats);
176 printf("%lu%% packet loss\n",
177 (ntransmitted - nreceived) * 100 / ntransmitted);
179 printf("round-trip min/avg/max = %lu.%lu/%lu.%lu/%lu.%lu ms\n",
180 tmin / 10, tmin % 10,
181 (tsum / (nreceived + nrepeats)) / 10,
182 (tsum / (nreceived + nrepeats)) % 10, tmax / 10, tmax % 10);
184 status = EXIT_SUCCESS;
186 status = EXIT_FAILURE;
190 static void sendping(int junk)
192 struct icmp6_hdr *pkt;
194 char packet[datalen + sizeof (struct icmp6_hdr)];
196 pkt = (struct icmp6_hdr *) packet;
198 pkt->icmp6_type = ICMP6_ECHO_REQUEST;
200 pkt->icmp6_cksum = 0;
201 pkt->icmp6_seq = htons(ntransmitted++);
202 pkt->icmp6_id = myid;
203 CLR(pkt->icmp6_seq % MAX_DUP_CHK);
205 gettimeofday((struct timeval *) &pkt->icmp6_data8[4], NULL);
207 i = sendto(pingsock, packet, sizeof(packet), 0,
208 (struct sockaddr *) &pingaddr, sizeof(struct sockaddr_in6));
211 bb_perror_msg_and_die("sendto");
212 else if ((size_t)i != sizeof(packet))
213 bb_error_msg_and_die("ping wrote %d chars; %d expected", i,
214 (int)sizeof(packet));
216 signal(SIGALRM, sendping);
217 if (pingcount == 0 || ntransmitted < pingcount) { /* schedule next in 1s */
219 } else { /* done, wait for the last ping to come back */
220 /* todo, don't necessarily need to wait so long... */
221 signal(SIGALRM, pingstats);
226 /* RFC3542 changed some definitions from RFC2292 for no good reason, whee !
227 * the newer 3542 uses a MLD_ prefix where as 2292 uses ICMP6_ prefix */
228 #ifndef MLD_LISTENER_QUERY
229 # define MLD_LISTENER_QUERY ICMP6_MEMBERSHIP_QUERY
231 #ifndef MLD_LISTENER_REPORT
232 # define MLD_LISTENER_REPORT ICMP6_MEMBERSHIP_REPORT
234 #ifndef MLD_LISTENER_REDUCTION
235 # define MLD_LISTENER_REDUCTION ICMP6_MEMBERSHIP_REDUCTION
237 static char *icmp6_type_name(int id)
240 case ICMP6_DST_UNREACH: return "Destination Unreachable";
241 case ICMP6_PACKET_TOO_BIG: return "Packet too big";
242 case ICMP6_TIME_EXCEEDED: return "Time Exceeded";
243 case ICMP6_PARAM_PROB: return "Parameter Problem";
244 case ICMP6_ECHO_REPLY: return "Echo Reply";
245 case ICMP6_ECHO_REQUEST: return "Echo Request";
246 case MLD_LISTENER_QUERY: return "Listener Query";
247 case MLD_LISTENER_REPORT: return "Listener Report";
248 case MLD_LISTENER_REDUCTION: return "Listener Reduction";
249 default: return "unknown ICMP type";
253 static void unpack(char *packet, int sz, struct sockaddr_in6 *from, int hoplimit)
255 struct icmp6_hdr *icmppkt;
256 struct timeval tv, *tp;
258 unsigned long triptime;
259 char buf[INET6_ADDRSTRLEN];
261 gettimeofday(&tv, NULL);
263 /* discard if too short */
264 if (sz < (datalen + sizeof(struct icmp6_hdr)))
267 icmppkt = (struct icmp6_hdr *) packet;
268 if (icmppkt->icmp6_id != myid)
269 return; /* not our ping */
271 if (icmppkt->icmp6_type == ICMP6_ECHO_REPLY) {
273 tp = (struct timeval *) &icmppkt->icmp6_data8[4];
275 if ((tv.tv_usec -= tp->tv_usec) < 0) {
277 tv.tv_usec += 1000000;
279 tv.tv_sec -= tp->tv_sec;
281 triptime = tv.tv_sec * 10000 + (tv.tv_usec / 100);
288 if (TST(icmppkt->icmp6_seq % MAX_DUP_CHK)) {
293 SET(icmppkt->icmp6_seq % MAX_DUP_CHK);
297 if (options & O_QUIET)
300 printf("%d bytes from %s: icmp6_seq=%u", sz,
301 inet_ntop(AF_INET6, &pingaddr.sin6_addr,
304 printf(" ttl=%d time=%lu.%lu ms", hoplimit,
305 triptime / 10, triptime % 10);
310 if (icmppkt->icmp6_type != ICMP6_ECHO_REQUEST)
311 bb_error_msg("Warning: Got ICMP %d (%s)",
312 icmppkt->icmp6_type, icmp6_type_name(icmppkt->icmp6_type));
315 static void ping(const char *host)
317 char packet[datalen + MAXIPLEN + MAXICMPLEN];
318 char buf[INET6_ADDRSTRLEN];
321 struct sockaddr_in6 from;
323 char control_buf[CMSG_SPACE(36)];
325 pingsock = create_icmp6_socket();
327 memset(&pingaddr, 0, sizeof(struct sockaddr_in));
329 pingaddr.sin6_family = AF_INET6;
330 hostent = xgethostbyname2(host, AF_INET6);
331 if (hostent->h_addrtype != AF_INET6)
332 bb_error_msg_and_die("unknown address type; only AF_INET6 is currently supported.");
334 memcpy(&pingaddr.sin6_addr, hostent->h_addr, sizeof(pingaddr.sin6_addr));
338 struct icmp6_filter filt;
339 if (!(options & O_VERBOSE)) {
340 ICMP6_FILTER_SETBLOCKALL(&filt);
341 ICMP6_FILTER_SETPASS(ICMP6_ECHO_REPLY, &filt);
343 ICMP6_FILTER_SETPASSALL(&filt);
345 if (setsockopt(pingsock, IPPROTO_ICMPV6, ICMP6_FILTER, &filt,
347 bb_error_msg_and_die("setsockopt(ICMP6_FILTER)");
349 #endif /*ICMP6_FILTER*/
351 /* enable broadcast pings */
353 setsockopt(pingsock, SOL_SOCKET, SO_BROADCAST, (char *) &sockopt,
356 /* set recv buf for broadcast pings */
358 setsockopt(pingsock, SOL_SOCKET, SO_RCVBUF, (char *) &sockopt,
361 sockopt = offsetof(struct icmp6_hdr, icmp6_cksum);
362 setsockopt(pingsock, SOL_RAW, IPV6_CHECKSUM, (char *) &sockopt,
366 setsockopt(pingsock, SOL_IPV6, IPV6_HOPLIMIT, (char *) &sockopt,
370 pingaddr.sin6_scope_id = if_index;
372 printf("PING %s (%s): %d data bytes\n",
374 inet_ntop(AF_INET6, &pingaddr.sin6_addr,
378 signal(SIGINT, pingstats);
380 /* start the ping's going ... */
383 /* listen for replies */
384 msg.msg_name = &from;
385 msg.msg_namelen = sizeof(from);
388 msg.msg_control = control_buf;
389 iov.iov_base = packet;
390 iov.iov_len = sizeof(packet);
393 struct cmsghdr *cmsgptr = NULL;
395 msg.msg_controllen = sizeof(control_buf);
397 if ((c = recvmsg(pingsock, &msg, 0)) < 0) {
400 bb_perror_msg("recvfrom");
403 for (cmsgptr = CMSG_FIRSTHDR(&msg); cmsgptr != NULL;
404 cmsgptr = CMSG_NXTHDR(&msg, cmsgptr)) {
405 if (cmsgptr->cmsg_level == SOL_IPV6 &&
406 cmsgptr->cmsg_type == IPV6_HOPLIMIT ) {
407 hoplimit = *(int*)CMSG_DATA(cmsgptr);
410 unpack(packet, c, &from, hoplimit);
411 if (pingcount > 0 && nreceived >= pingcount)
417 int ping6_main(int argc, char **argv)
421 datalen = DEFDATALEN; /* initialized here rather than in global scope to work around gcc bug */
425 /* Parse any options */
426 while (argc >= 1 && **argv == '-') {
432 options |= O_VERBOSE;
435 options &= ~O_VERBOSE;
442 pingcount = xatoul(*argv);
448 datalen = xatou16(*argv);
454 if_index = if_nametoindex(*argv);
456 bb_error_msg_and_die(
457 "%s: invalid interface name", *argv);
468 myid = (int16_t) getpid();
472 #endif /* ! CONFIG_FEATURE_FANCY_PING6 */
475 * Copyright (c) 1989 The Regents of the University of California.
476 * All rights reserved.
478 * This code is derived from software contributed to Berkeley by
481 * Redistribution and use in source and binary forms, with or without
482 * modification, are permitted provided that the following conditions
484 * 1. Redistributions of source code must retain the above copyright
485 * notice, this list of conditions and the following disclaimer.
486 * 2. Redistributions in binary form must reproduce the above copyright
487 * notice, this list of conditions and the following disclaimer in the
488 * documentation and/or other materials provided with the distribution.
490 * 3. <BSD Advertising Clause omitted per the July 22, 1999 licensing change
491 * ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change>
493 * 4. Neither the name of the University nor the names of its contributors
494 * may be used to endorse or promote products derived from this software
495 * without specific prior written permission.
497 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
498 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
499 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
500 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
501 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
502 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
503 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
504 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
505 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
506 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF