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 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 * This version of ping is adapted from the ping in netkit-base 0.10,
25 * Copyright (c) 1989 The Regents of the University of California.
26 * All rights reserved.
28 * This code is derived from software contributed to Berkeley by
31 * Original copyright notice is retained at the end of this file.
33 * This version is an adaptation of ping.c from busybox.
34 * The code was modified by Bart Visscher <magick@linux-fan.com>
37 #include <sys/param.h>
38 #include <sys/socket.h>
41 #include <sys/times.h>
44 #include <netinet/in.h>
45 #include <netinet/ip6.h>
46 #include <netinet/icmp6.h>
47 #include <arpa/inet.h>
56 #include <stddef.h> /* offsetof */
64 MAX_DUP_CHK = (8 * 128),
66 PINGINTERVAL = 1 /* second */
69 #define O_QUIET (1 << 0)
70 #define O_VERBOSE (1 << 1)
72 #define A(bit) rcvd_tbl[(bit)>>3] /* identify byte in array */
73 #define B(bit) (1 << ((bit) & 0x07)) /* identify bit in byte */
74 #define SET(bit) (A(bit) |= B(bit))
75 #define CLR(bit) (A(bit) &= (~B(bit)))
76 #define TST(bit) (A(bit) & B(bit))
78 static void ping(const char *host);
81 #ifndef CONFIG_FEATURE_FANCY_PING6
82 static struct hostent *h;
86 printf("No response from %s\n", h->h_name);
90 static void ping(const char *host)
92 struct sockaddr_in6 pingaddr;
93 struct icmp6_hdr *pkt;
96 char packet[DEFDATALEN + MAXIPLEN + MAXICMPLEN];
98 pingsock = create_icmp6_socket();
100 memset(&pingaddr, 0, sizeof(struct sockaddr_in));
102 pingaddr.sin6_family = AF_INET6;
103 h = xgethostbyname2(host, AF_INET6);
104 memcpy(&pingaddr.sin6_addr, h->h_addr, sizeof(pingaddr.sin6_addr));
106 pkt = (struct icmp6_hdr *) packet;
107 memset(pkt, 0, sizeof(packet));
108 pkt->icmp6_type = ICMP6_ECHO_REQUEST;
110 sockopt = offsetof(struct icmp6_hdr, icmp6_cksum);
111 setsockopt(pingsock, SOL_RAW, IPV6_CHECKSUM, (char *) &sockopt,
114 c = sendto(pingsock, packet, DEFDATALEN + sizeof (struct icmp6_hdr), 0,
115 (struct sockaddr *) &pingaddr, sizeof(struct sockaddr_in6));
117 if (c < 0 || c != sizeof(packet))
118 bb_perror_msg_and_die("sendto");
120 signal(SIGALRM, noresp);
121 alarm(5); /* give the host 5000ms to respond */
122 /* listen for replies */
124 struct sockaddr_in6 from;
125 size_t fromlen = sizeof(from);
127 if ((c = recvfrom(pingsock, packet, sizeof(packet), 0,
128 (struct sockaddr *) &from, &fromlen)) < 0) {
131 bb_perror_msg("recvfrom");
134 if (c >= 8) { /* icmp6_hdr */
135 pkt = (struct icmp6_hdr *) packet;
136 if (pkt->icmp6_type == ICMP6_ECHO_REPLY)
140 printf("%s is alive!\n", h->h_name);
144 int ping6_main(int argc, char **argv)
154 #else /* ! CONFIG_FEATURE_FANCY_PING6 */
155 /* full(er) version */
156 static struct sockaddr_in6 pingaddr;
157 static int pingsock = -1;
158 static int datalen; /* intentionally uninitialized to work around gcc bug */
161 static long ntransmitted, nreceived, nrepeats, pingcount;
162 static int myid, options;
163 static unsigned long tmin = ULONG_MAX, tmax, tsum;
164 static char rcvd_tbl[MAX_DUP_CHK / 8];
166 # ifdef CONFIG_FEATURE_FANCY_PING
169 struct hostent *hostent;
171 static void sendping(int);
172 static void pingstats(int);
173 static void unpack(char *, int, struct sockaddr_in6 *, int);
175 /**************************************************************************/
177 static void pingstats(int junk)
181 signal(SIGINT, SIG_IGN);
183 printf("\n--- %s ping statistics ---\n", hostent->h_name);
184 printf("%ld packets transmitted, ", ntransmitted);
185 printf("%ld packets received, ", nreceived);
187 printf("%ld duplicates, ", nrepeats);
189 printf("%ld%% packet loss\n",
190 (ntransmitted - nreceived) * 100 / ntransmitted);
192 printf("round-trip min/avg/max = %lu.%lu/%lu.%lu/%lu.%lu ms\n",
193 tmin / 10, tmin % 10,
194 (tsum / (nreceived + nrepeats)) / 10,
195 (tsum / (nreceived + nrepeats)) % 10, tmax / 10, tmax % 10);
197 status = EXIT_SUCCESS;
199 status = EXIT_FAILURE;
203 static void sendping(int junk)
205 struct icmp6_hdr *pkt;
207 char packet[datalen + sizeof (struct icmp6_hdr)];
209 pkt = (struct icmp6_hdr *) packet;
211 pkt->icmp6_type = ICMP6_ECHO_REQUEST;
213 pkt->icmp6_cksum = 0;
214 pkt->icmp6_seq = ntransmitted++;
215 pkt->icmp6_id = myid;
216 CLR(pkt->icmp6_seq % MAX_DUP_CHK);
218 gettimeofday((struct timeval *) &pkt->icmp6_data8[4], NULL);
220 i = sendto(pingsock, packet, sizeof(packet), 0,
221 (struct sockaddr *) &pingaddr, sizeof(struct sockaddr_in6));
224 bb_perror_msg_and_die("sendto");
225 else if ((size_t)i != sizeof(packet))
226 bb_error_msg_and_die("ping wrote %d chars; %d expected", i,
227 (int)sizeof(packet));
229 signal(SIGALRM, sendping);
230 if (pingcount == 0 || ntransmitted < pingcount) { /* schedule next in 1s */
232 } else { /* done, wait for the last ping to come back */
233 /* todo, don't necessarily need to wait so long... */
234 signal(SIGALRM, pingstats);
239 /* RFC3542 changed some definitions from RFC2292 for no good reason, whee !
240 * the newer 3542 uses a MLD_ prefix where as 2292 uses ICMP6_ prefix */
241 #ifndef MLD_LISTENER_QUERY
242 # define MLD_LISTENER_QUERY ICMP6_MEMBERSHIP_QUERY
244 #ifndef MLD_LISTENER_REPORT
245 # define MLD_LISTENER_REPORT ICMP6_MEMBERSHIP_REPORT
247 #ifndef MLD_LISTENER_REDUCTION
248 # define MLD_LISTENER_REDUCTION ICMP6_MEMBERSHIP_REDUCTION
250 static char *icmp6_type_name (int id)
253 case ICMP6_DST_UNREACH: return "Destination Unreachable";
254 case ICMP6_PACKET_TOO_BIG: return "Packet too big";
255 case ICMP6_TIME_EXCEEDED: return "Time Exceeded";
256 case ICMP6_PARAM_PROB: return "Parameter Problem";
257 case ICMP6_ECHO_REPLY: return "Echo Reply";
258 case ICMP6_ECHO_REQUEST: return "Echo Request";
259 case MLD_LISTENER_QUERY: return "Listener Query";
260 case MLD_LISTENER_REPORT: return "Listener Report";
261 case MLD_LISTENER_REDUCTION: return "Listener Reduction";
262 default: return "unknown ICMP type";
266 static void unpack(char *packet, int sz, struct sockaddr_in6 *from, int hoplimit)
268 struct icmp6_hdr *icmppkt;
269 struct timeval tv, *tp;
271 unsigned long triptime;
272 char buf[INET6_ADDRSTRLEN];
274 gettimeofday(&tv, NULL);
276 /* discard if too short */
277 if (sz < (datalen + sizeof(struct icmp6_hdr)))
280 icmppkt = (struct icmp6_hdr *) packet;
282 if (icmppkt->icmp6_id != myid)
283 return; /* not our ping */
285 if (icmppkt->icmp6_type == ICMP6_ECHO_REPLY) {
287 tp = (struct timeval *) &icmppkt->icmp6_data8[4];
289 if ((tv.tv_usec -= tp->tv_usec) < 0) {
291 tv.tv_usec += 1000000;
293 tv.tv_sec -= tp->tv_sec;
295 triptime = tv.tv_sec * 10000 + (tv.tv_usec / 100);
302 if (TST(icmppkt->icmp6_seq % MAX_DUP_CHK)) {
307 SET(icmppkt->icmp6_seq % MAX_DUP_CHK);
311 if (options & O_QUIET)
314 printf("%d bytes from %s: icmp6_seq=%u", sz,
315 inet_ntop(AF_INET6, (struct in_addr6 *) &pingaddr.sin6_addr,
318 printf(" ttl=%d time=%lu.%lu ms", hoplimit,
319 triptime / 10, triptime % 10);
324 if (icmppkt->icmp6_type != ICMP6_ECHO_REQUEST)
325 bb_error_msg("Warning: Got ICMP %d (%s)",
326 icmppkt->icmp6_type, icmp6_type_name (icmppkt->icmp6_type));
329 static void ping(const char *host)
331 char packet[datalen + MAXIPLEN + MAXICMPLEN];
332 char buf[INET6_ADDRSTRLEN];
335 struct sockaddr_in6 from;
337 char control_buf[CMSG_SPACE(36)];
339 pingsock = create_icmp6_socket();
341 memset(&pingaddr, 0, sizeof(struct sockaddr_in));
343 pingaddr.sin6_family = AF_INET6;
344 hostent = xgethostbyname2(host, AF_INET6);
345 if (hostent->h_addrtype != AF_INET6)
346 bb_error_msg_and_die("unknown address type; only AF_INET6 is currently supported.");
348 memcpy(&pingaddr.sin6_addr, hostent->h_addr, sizeof(pingaddr.sin6_addr));
352 struct icmp6_filter filt;
353 if (!(options & O_VERBOSE)) {
354 ICMP6_FILTER_SETBLOCKALL(&filt);
356 if ((options & F_FQDN) || (options & F_FQDNOLD) ||
357 (options & F_NODEADDR) || (options & F_SUPTYPES))
358 ICMP6_FILTER_SETPASS(ICMP6_NI_REPLY, &filt);
361 ICMP6_FILTER_SETPASS(ICMP6_ECHO_REPLY, &filt);
363 ICMP6_FILTER_SETPASSALL(&filt);
365 if (setsockopt(pingsock, IPPROTO_ICMPV6, ICMP6_FILTER, &filt,
367 bb_error_msg_and_die("setsockopt(ICMP6_FILTER)");
369 #endif /*ICMP6_FILTER*/
371 /* enable broadcast pings */
373 setsockopt(pingsock, SOL_SOCKET, SO_BROADCAST, (char *) &sockopt,
376 /* set recv buf for broadcast pings */
378 setsockopt(pingsock, SOL_SOCKET, SO_RCVBUF, (char *) &sockopt,
381 sockopt = offsetof(struct icmp6_hdr, icmp6_cksum);
382 setsockopt(pingsock, SOL_RAW, IPV6_CHECKSUM, (char *) &sockopt,
386 setsockopt(pingsock, SOL_IPV6, IPV6_HOPLIMIT, (char *) &sockopt,
390 if ((pingaddr.sin6_scope_id = if_nametoindex(ifname)) == 0)
391 bb_error_msg_and_die("%s: invalid interface name", ifname);
394 printf("PING %s (%s): %d data bytes\n",
396 inet_ntop(AF_INET6, (struct in_addr6 *) &pingaddr.sin6_addr,
400 signal(SIGINT, pingstats);
402 /* start the ping's going ... */
405 /* listen for replies */
407 msg.msg_namelen=sizeof(from);
410 msg.msg_control=control_buf;
412 iov.iov_len=sizeof(packet);
415 struct cmsghdr *cmsgptr = NULL;
417 msg.msg_controllen=sizeof(control_buf);
419 if ((c = recvmsg(pingsock, &msg, 0)) < 0) {
422 bb_perror_msg("recvfrom");
425 for (cmsgptr = CMSG_FIRSTHDR(&msg); cmsgptr != NULL;
426 cmsgptr = CMSG_NXTHDR(&msg, cmsgptr)) {
427 if (cmsgptr->cmsg_level == SOL_IPV6 &&
428 cmsgptr->cmsg_type == IPV6_HOPLIMIT ) {
429 hoplimit=*(int*)CMSG_DATA(cmsgptr);
432 unpack(packet, c, &from, hoplimit);
433 if (pingcount > 0 && nreceived >= pingcount)
439 int ping6_main(int argc, char **argv)
443 datalen = DEFDATALEN; /* initialized here rather than in global scope to work around gcc bug */
448 /* Parse any options */
449 while (argc >= 1 && **argv == '-') {
455 options |= O_VERBOSE;
458 options &= ~O_VERBOSE;
465 pingcount = atoi(*argv);
471 datalen = atoi(*argv);
488 myid = getpid() & 0xFFFF;
492 #endif /* ! CONFIG_FEATURE_FANCY_PING6 */
495 * Copyright (c) 1989 The Regents of the University of California.
496 * All rights reserved.
498 * This code is derived from software contributed to Berkeley by
501 * Redistribution and use in source and binary forms, with or without
502 * modification, are permitted provided that the following conditions
504 * 1. Redistributions of source code must retain the above copyright
505 * notice, this list of conditions and the following disclaimer.
506 * 2. Redistributions in binary form must reproduce the above copyright
507 * notice, this list of conditions and the following disclaimer in the
508 * documentation and/or other materials provided with the distribution.
510 * 3. <BSD Advertising Clause omitted per the July 22, 1999 licensing change
511 * ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change>
513 * 4. Neither the name of the University nor the names of its contributors
514 * may be used to endorse or promote products derived from this software
515 * without specific prior written permission.
517 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
518 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
519 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
520 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
521 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
522 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
523 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
524 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
525 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
526 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF