blob: b8a438ba82440688e707a21dd19cb2e27875388b [file] [log] [blame]
Erik Andersene49d5ec2000-02-08 19:58:47 +00001/* vi: set sw=4 ts=4: */
Eric Andersen485b9551999-12-07 23:14:59 +00002/*
Eric Andersen485b9551999-12-07 23:14:59 +00003 * Mini ping implementation for busybox
4 *
5 * Copyright (C) 1999 by Randolph Chung <tausq@debian.org>
6 *
Rob Landley42eddba2005-12-15 08:04:17 +00007 * Adapted from the ping in netkit-base 0.10:
Eric Andersen485b9551999-12-07 23:14:59 +00008 * Copyright (c) 1989 The Regents of the University of California.
Denis Vlasenko35d4da02007-01-22 14:04:27 +00009 * All rights reserved.
10 *
11 * This code is derived from software contributed to Berkeley by
12 * Mike Muuss.
Eric Andersen485b9551999-12-07 23:14:59 +000013 *
Denys Vlasenko0ef64bd2010-08-16 20:14:46 +020014 * Licensed under GPLv2 or later, see file LICENSE in this source tree.
Eric Andersen485b9551999-12-07 23:14:59 +000015 */
Denis Vlasenkob9a279b2007-01-24 23:53:22 +000016/* 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 */
Eric Andersen485b9551999-12-07 23:14:59 +000027
Denis Vlasenkob9a279b2007-01-24 23:53:22 +000028#include <net/if.h>
Eric Andersen485b9551999-12-07 23:14:59 +000029#include <netinet/ip_icmp.h>
Denis Vlasenkob6adbf12007-05-26 19:00:18 +000030#include "libbb.h"
Denis Vlasenkoe9356022007-01-29 18:03:54 +000031
Denys Vlasenko14bd16a2011-07-08 08:49:40 +020032#ifdef __BIONIC__
33/* should be in netinet/ip_icmp.h */
34# define ICMP_DEST_UNREACH 3 /* Destination Unreachable */
35# define ICMP_SOURCE_QUENCH 4 /* Source Quench */
36# define ICMP_REDIRECT 5 /* Redirect (change route) */
37# define ICMP_ECHO 8 /* Echo Request */
38# define ICMP_TIME_EXCEEDED 11 /* Time Exceeded */
39# define ICMP_PARAMETERPROB 12 /* Parameter Problem */
40# define ICMP_TIMESTAMP 13 /* Timestamp Request */
41# define ICMP_TIMESTAMPREPLY 14 /* Timestamp Reply */
42# define ICMP_INFO_REQUEST 15 /* Information Request */
43# define ICMP_INFO_REPLY 16 /* Information Reply */
44# define ICMP_ADDRESS 17 /* Address Mask Request */
45# define ICMP_ADDRESSREPLY 18 /* Address Mask Reply */
46#endif
47
Joachim Nilsson714e2b72010-11-28 23:01:18 +010048//config:config PING
49//config: bool "ping"
50//config: default y
Denys Vlasenkoe3b1a1f2011-02-26 22:24:08 +010051//config: select PLATFORM_LINUX
Joachim Nilsson714e2b72010-11-28 23:01:18 +010052//config: help
53//config: ping uses the ICMP protocol's mandatory ECHO_REQUEST datagram to
54//config: elicit an ICMP ECHO_RESPONSE from a host or gateway.
55//config:
56//config:config PING6
57//config: bool "ping6"
58//config: default y
59//config: depends on FEATURE_IPV6 && PING
60//config: help
61//config: This will give you a ping that can talk IPv6.
62//config:
63//config:config FEATURE_FANCY_PING
64//config: bool "Enable fancy ping output"
65//config: default y
66//config: depends on PING
67//config: help
68//config: Make the output from the ping applet include statistics, and at the
69//config: same time provide full support for ICMP packets.
70
Denys Vlasenkob9f2d9f2011-01-18 13:58:01 +010071/* Needs socket(AF_INET, SOCK_RAW, IPPROTO_ICMP), therefore BB_SUID_MAYBE: */
72//applet:IF_PING(APPLET(ping, BB_DIR_BIN, BB_SUID_MAYBE))
73//applet:IF_PING6(APPLET(ping6, BB_DIR_BIN, BB_SUID_MAYBE))
Joachim Nilsson714e2b72010-11-28 23:01:18 +010074
75//kbuild:lib-$(CONFIG_PING) += ping.o
76//kbuild:lib-$(CONFIG_PING6) += ping.o
77
78//usage:#if !ENABLE_FEATURE_FANCY_PING
79//usage:# define ping_trivial_usage
80//usage: "HOST"
81//usage:# define ping_full_usage "\n\n"
82//usage: "Send ICMP ECHO_REQUEST packets to network hosts"
83//usage:# define ping6_trivial_usage
84//usage: "HOST"
85//usage:# define ping6_full_usage "\n\n"
86//usage: "Send ICMP ECHO_REQUEST packets to network hosts"
87//usage:#else
88//usage:# define ping_trivial_usage
89//usage: "[OPTIONS] HOST"
90//usage:# define ping_full_usage "\n\n"
91//usage: "Send ICMP ECHO_REQUEST packets to network hosts\n"
Joachim Nilsson714e2b72010-11-28 23:01:18 +010092//usage: "\n -4,-6 Force IP or IPv6 name resolution"
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 -t TTL Set TTL"
96//usage: "\n -I IFACE/IP Use interface or IP address as source"
97//usage: "\n -W SEC Seconds to wait for the first response (default:10)"
98//usage: "\n (after all -c CNT packets are sent)"
99//usage: "\n -w SEC Seconds until ping exits (default:infinite)"
100//usage: "\n (can exit earlier with -c CNT)"
101//usage: "\n -q Quiet, only displays output at start"
102//usage: "\n and when finished"
103//usage:
104//usage:# define ping6_trivial_usage
105//usage: "[OPTIONS] HOST"
106//usage:# define ping6_full_usage "\n\n"
107//usage: "Send ICMP ECHO_REQUEST packets to network hosts\n"
Joachim Nilsson714e2b72010-11-28 23:01:18 +0100108//usage: "\n -c CNT Send only CNT pings"
109//usage: "\n -s SIZE Send SIZE data bytes in packets (default:56)"
110//usage: "\n -I IFACE/IP Use interface or IP address as source"
111//usage: "\n -q Quiet, only displays output at start"
112//usage: "\n and when finished"
113//usage:
114//usage:#endif
115//usage:
116//usage:#define ping_example_usage
117//usage: "$ ping localhost\n"
118//usage: "PING slag (127.0.0.1): 56 data bytes\n"
119//usage: "64 bytes from 127.0.0.1: icmp_seq=0 ttl=255 time=20.1 ms\n"
120//usage: "\n"
121//usage: "--- debian ping statistics ---\n"
122//usage: "1 packets transmitted, 1 packets received, 0% packet loss\n"
123//usage: "round-trip min/avg/max = 20.1/20.1/20.1 ms\n"
124//usage:#define ping6_example_usage
125//usage: "$ ping6 ip6-localhost\n"
126//usage: "PING ip6-localhost (::1): 56 data bytes\n"
127//usage: "64 bytes from ::1: icmp6_seq=0 ttl=64 time=20.1 ms\n"
128//usage: "\n"
129//usage: "--- ip6-localhost ping statistics ---\n"
130//usage: "1 packets transmitted, 1 packets received, 0% packet loss\n"
131//usage: "round-trip min/avg/max = 20.1/20.1/20.1 ms\n"
132
Denis Vlasenkob9a279b2007-01-24 23:53:22 +0000133#if ENABLE_PING6
Denys Vlasenkoad7d94b2009-11-20 18:12:12 +0100134# include <netinet/icmp6.h>
Denis Vlasenkob9a279b2007-01-24 23:53:22 +0000135/* I see RENUMBERED constants in bits/in.h - !!?
136 * What a fuck is going on with libc? Is it a glibc joke? */
Denys Vlasenkoad7d94b2009-11-20 18:12:12 +0100137# ifdef IPV6_2292HOPLIMIT
138# undef IPV6_HOPLIMIT
139# define IPV6_HOPLIMIT IPV6_2292HOPLIMIT
140# endif
Denis Vlasenkob9a279b2007-01-24 23:53:22 +0000141#endif
Eric Andersen485b9551999-12-07 23:14:59 +0000142
Rob Landleybc68cd12006-03-10 19:22:06 +0000143enum {
144 DEFDATALEN = 56,
145 MAXIPLEN = 60,
146 MAXICMPLEN = 76,
Rob Landleybc68cd12006-03-10 19:22:06 +0000147 MAX_DUP_CHK = (8 * 128),
148 MAXWAIT = 10,
Denis Vlasenkob9a279b2007-01-24 23:53:22 +0000149 PINGINTERVAL = 1, /* 1 second */
Rob Landleybc68cd12006-03-10 19:22:06 +0000150};
Eric Andersen485b9551999-12-07 23:14:59 +0000151
Denis Vlasenkob9a279b2007-01-24 23:53:22 +0000152#if !ENABLE_FEATURE_FANCY_PING
Denis Vlasenko4a5cf162006-11-20 00:48:22 +0000153
Denys Vlasenko9341fd22010-03-03 01:10:29 +0100154/* Simple version */
Denis Vlasenko4a5cf162006-11-20 00:48:22 +0000155
Denys Vlasenko9341fd22010-03-03 01:10:29 +0100156struct globals {
157 char *hostname;
158 char packet[DEFDATALEN + MAXIPLEN + MAXICMPLEN];
159} FIX_ALIASING;
160#define G (*(struct globals*)&bb_common_bufsiz1)
161#define INIT_G() do { } while (0)
Denis Vlasenkocb6874c2006-09-02 16:13:36 +0000162
Denis Vlasenkoa60f84e2008-07-05 09:18:54 +0000163static void noresp(int ign UNUSED_PARAM)
Eric Andersenb5474c42002-03-20 11:59:28 +0000164{
Denys Vlasenko9341fd22010-03-03 01:10:29 +0100165 printf("No response from %s\n", G.hostname);
Eric Andersen4e486a52003-01-12 06:08:33 +0000166 exit(EXIT_FAILURE);
Eric Andersenb5474c42002-03-20 11:59:28 +0000167}
Eric Andersen19db07b1999-12-11 08:41:28 +0000168
Denis Vlasenkoe9356022007-01-29 18:03:54 +0000169static void ping4(len_and_sockaddr *lsa)
Eric Andersen19db07b1999-12-11 08:41:28 +0000170{
Erik Andersene49d5ec2000-02-08 19:58:47 +0000171 struct icmp *pkt;
172 int pingsock, c;
Eric Andersen19db07b1999-12-11 08:41:28 +0000173
Matt Kraai06ef1652001-07-13 20:56:27 +0000174 pingsock = create_icmp_socket();
Erik Andersene49d5ec2000-02-08 19:58:47 +0000175
Denys Vlasenko9341fd22010-03-03 01:10:29 +0100176 pkt = (struct icmp *) G.packet;
177 memset(pkt, 0, sizeof(G.packet));
Erik Andersene49d5ec2000-02-08 19:58:47 +0000178 pkt->icmp_type = ICMP_ECHO;
Baruch Siache8f36332011-09-07 17:52:37 +0200179 pkt->icmp_cksum = inet_cksum((uint16_t *) pkt, sizeof(G.packet));
Erik Andersene49d5ec2000-02-08 19:58:47 +0000180
Denys Vlasenko9341fd22010-03-03 01:10:29 +0100181 xsendto(pingsock, G.packet, DEFDATALEN + ICMP_MINLEN, &lsa->u.sa, lsa->len);
Erik Andersene49d5ec2000-02-08 19:58:47 +0000182
Erik Andersene49d5ec2000-02-08 19:58:47 +0000183 /* listen for replies */
184 while (1) {
185 struct sockaddr_in from;
Mike Frysinger03e827a2005-07-26 23:00:59 +0000186 socklen_t fromlen = sizeof(from);
Erik Andersene49d5ec2000-02-08 19:58:47 +0000187
Denys Vlasenko9341fd22010-03-03 01:10:29 +0100188 c = recvfrom(pingsock, G.packet, sizeof(G.packet), 0,
Denis Vlasenko806116b2006-12-31 12:14:16 +0000189 (struct sockaddr *) &from, &fromlen);
190 if (c < 0) {
Denis Vlasenko44c2eb22007-01-08 23:55:33 +0000191 if (errno != EINTR)
192 bb_perror_msg("recvfrom");
Erik Andersene49d5ec2000-02-08 19:58:47 +0000193 continue;
194 }
195 if (c >= 76) { /* ip + icmp */
Denys Vlasenko9341fd22010-03-03 01:10:29 +0100196 struct iphdr *iphdr = (struct iphdr *) G.packet;
Erik Andersene49d5ec2000-02-08 19:58:47 +0000197
Denys Vlasenko9341fd22010-03-03 01:10:29 +0100198 pkt = (struct icmp *) (G.packet + (iphdr->ihl << 2)); /* skip ip hdr */
Erik Andersene49d5ec2000-02-08 19:58:47 +0000199 if (pkt->icmp_type == ICMP_ECHOREPLY)
200 break;
201 }
202 }
Denis Vlasenko9adc6ce2007-01-22 22:45:27 +0000203 if (ENABLE_FEATURE_CLEAN_UP)
204 close(pingsock);
Eric Andersen19db07b1999-12-11 08:41:28 +0000205}
206
Denis Vlasenkob9a279b2007-01-24 23:53:22 +0000207#if ENABLE_PING6
208static void ping6(len_and_sockaddr *lsa)
209{
Denis Vlasenkob9a279b2007-01-24 23:53:22 +0000210 struct icmp6_hdr *pkt;
211 int pingsock, c;
212 int sockopt;
Denis Vlasenkob9a279b2007-01-24 23:53:22 +0000213
214 pingsock = create_icmp6_socket();
Denis Vlasenkob9a279b2007-01-24 23:53:22 +0000215
Denys Vlasenko9341fd22010-03-03 01:10:29 +0100216 pkt = (struct icmp6_hdr *) G.packet;
217 memset(pkt, 0, sizeof(G.packet));
Denis Vlasenkob9a279b2007-01-24 23:53:22 +0000218 pkt->icmp6_type = ICMP6_ECHO_REQUEST;
219
220 sockopt = offsetof(struct icmp6_hdr, icmp6_cksum);
221 setsockopt(pingsock, SOL_RAW, IPV6_CHECKSUM, &sockopt, sizeof(sockopt));
222
Denys Vlasenko9341fd22010-03-03 01:10:29 +0100223 xsendto(pingsock, G.packet, DEFDATALEN + sizeof(struct icmp6_hdr), &lsa->u.sa, lsa->len);
Denis Vlasenkob9a279b2007-01-24 23:53:22 +0000224
Denis Vlasenkob9a279b2007-01-24 23:53:22 +0000225 /* listen for replies */
226 while (1) {
227 struct sockaddr_in6 from;
228 socklen_t fromlen = sizeof(from);
229
Denys Vlasenko9341fd22010-03-03 01:10:29 +0100230 c = recvfrom(pingsock, G.packet, sizeof(G.packet), 0,
Denis Vlasenkob9a279b2007-01-24 23:53:22 +0000231 (struct sockaddr *) &from, &fromlen);
232 if (c < 0) {
233 if (errno != EINTR)
234 bb_perror_msg("recvfrom");
235 continue;
236 }
Bernhard Reutner-Fischerdfd38a42010-01-23 12:52:40 +0100237 if (c >= ICMP_MINLEN) { /* icmp6_hdr */
Denys Vlasenko9341fd22010-03-03 01:10:29 +0100238 pkt = (struct icmp6_hdr *) G.packet;
Denis Vlasenkob9a279b2007-01-24 23:53:22 +0000239 if (pkt->icmp6_type == ICMP6_ECHO_REPLY)
240 break;
241 }
242 }
243 if (ENABLE_FEATURE_CLEAN_UP)
244 close(pingsock);
245}
246#endif
247
Denys Vlasenkoad7d94b2009-11-20 18:12:12 +0100248#if !ENABLE_PING6
249# define common_ping_main(af, argv) common_ping_main(argv)
250#endif
251static int common_ping_main(sa_family_t af, char **argv)
Eric Andersen19db07b1999-12-11 08:41:28 +0000252{
Denis Vlasenkob9a279b2007-01-24 23:53:22 +0000253 len_and_sockaddr *lsa;
Denis Vlasenko3483e852007-07-02 15:47:52 +0000254
Denys Vlasenko9341fd22010-03-03 01:10:29 +0100255 INIT_G();
256
Denys Vlasenkoad7d94b2009-11-20 18:12:12 +0100257#if ENABLE_PING6
Denis Vlasenko3483e852007-07-02 15:47:52 +0000258 while ((++argv)[0] && argv[0][0] == '-') {
Denis Vlasenkob9a279b2007-01-24 23:53:22 +0000259 if (argv[0][1] == '4') {
260 af = AF_INET;
261 continue;
262 }
263 if (argv[0][1] == '6') {
264 af = AF_INET6;
265 continue;
266 }
Manuel Novoa III cad53642003-03-19 09:13:01 +0000267 bb_show_usage();
Denis Vlasenkob9a279b2007-01-24 23:53:22 +0000268 }
269#else
270 argv++;
271#endif
272
Denys Vlasenko9341fd22010-03-03 01:10:29 +0100273 G.hostname = *argv;
274 if (!G.hostname)
Denis Vlasenkob9a279b2007-01-24 23:53:22 +0000275 bb_show_usage();
276
277#if ENABLE_PING6
Denys Vlasenko9341fd22010-03-03 01:10:29 +0100278 lsa = xhost_and_af2sockaddr(G.hostname, 0, af);
Denis Vlasenkob9a279b2007-01-24 23:53:22 +0000279#else
Denys Vlasenko9341fd22010-03-03 01:10:29 +0100280 lsa = xhost_and_af2sockaddr(G.hostname, 0, AF_INET);
Denis Vlasenkob9a279b2007-01-24 23:53:22 +0000281#endif
282 /* Set timer _after_ DNS resolution */
283 signal(SIGALRM, noresp);
284 alarm(5); /* give the host 5000ms to respond */
285
286#if ENABLE_PING6
Bernhard Reutner-Fischer8c69afd2008-01-29 10:33:34 +0000287 if (lsa->u.sa.sa_family == AF_INET6)
Denis Vlasenkob9a279b2007-01-24 23:53:22 +0000288 ping6(lsa);
289 else
290#endif
Denis Vlasenkoe9356022007-01-29 18:03:54 +0000291 ping4(lsa);
Denys Vlasenko9341fd22010-03-03 01:10:29 +0100292 printf("%s is alive!\n", G.hostname);
Matt Kraai3e856ce2000-12-01 02:55:13 +0000293 return EXIT_SUCCESS;
Eric Andersen19db07b1999-12-11 08:41:28 +0000294}
295
Denis Vlasenkob9a279b2007-01-24 23:53:22 +0000296
297#else /* FEATURE_FANCY_PING */
298
Denis Vlasenko4a5cf162006-11-20 00:48:22 +0000299
Denys Vlasenko9341fd22010-03-03 01:10:29 +0100300/* Full(er) version */
Denis Vlasenko4a5cf162006-11-20 00:48:22 +0000301
Joachim Nilsson714e2b72010-11-28 23:01:18 +0100302#define OPT_STRING ("qvc:s:t:w:W:I:4" IF_PING6("6"))
Denis Vlasenko4a5cf162006-11-20 00:48:22 +0000303enum {
304 OPT_QUIET = 1 << 0,
Denis Vlasenkob9a279b2007-01-24 23:53:22 +0000305 OPT_VERBOSE = 1 << 1,
306 OPT_c = 1 << 2,
307 OPT_s = 1 << 3,
Joachim Nilsson714e2b72010-11-28 23:01:18 +0100308 OPT_t = 1 << 4,
309 OPT_w = 1 << 5,
310 OPT_W = 1 << 6,
311 OPT_I = 1 << 7,
312 OPT_IPV4 = 1 << 8,
313 OPT_IPV6 = (1 << 9) * ENABLE_PING6,
Denis Vlasenko4a5cf162006-11-20 00:48:22 +0000314};
315
Denis Vlasenkob9a279b2007-01-24 23:53:22 +0000316
Denis Vlasenko821cc252007-06-04 10:33:48 +0000317struct globals {
318 int pingsock;
Denis Vlasenko1a7afb42007-10-19 21:39:25 +0000319 int if_index;
Denis Vlasenko59f502b2008-10-27 11:54:45 +0000320 char *str_I;
Denis Vlasenko821cc252007-06-04 10:33:48 +0000321 len_and_sockaddr *source_lsa;
322 unsigned datalen;
Denis Vlasenko59f502b2008-10-27 11:54:45 +0000323 unsigned pingcount; /* must be int-sized */
Joachim Nilsson714e2b72010-11-28 23:01:18 +0100324 unsigned opt_ttl;
Denis Vlasenko59f502b2008-10-27 11:54:45 +0000325 unsigned long ntransmitted, nreceived, nrepeats;
Denis Vlasenko821cc252007-06-04 10:33:48 +0000326 uint16_t myid;
Denis Vlasenko76791452007-06-18 08:55:57 +0000327 unsigned tmin, tmax; /* in us */
328 unsigned long long tsum; /* in us, sum of all times */
Denis Vlasenko90c31b32008-04-07 00:46:29 +0000329 unsigned deadline;
330 unsigned timeout;
331 unsigned total_secs;
Denys Vlasenko9341fd22010-03-03 01:10:29 +0100332 unsigned sizeof_rcv_packet;
333 char *rcv_packet; /* [datalen + MAXIPLEN + MAXICMPLEN] */
334 void *snd_packet; /* [datalen + ipv4/ipv6_const] */
Denis Vlasenko821cc252007-06-04 10:33:48 +0000335 const char *hostname;
336 const char *dotted;
337 union {
338 struct sockaddr sa;
339 struct sockaddr_in sin;
Denis Vlasenkob9a279b2007-01-24 23:53:22 +0000340#if ENABLE_PING6
Denis Vlasenko821cc252007-06-04 10:33:48 +0000341 struct sockaddr_in6 sin6;
Denis Vlasenkob9a279b2007-01-24 23:53:22 +0000342#endif
Denis Vlasenko821cc252007-06-04 10:33:48 +0000343 } pingaddr;
344 char rcvd_tbl[MAX_DUP_CHK / 8];
Denys Vlasenko98a4c7c2010-02-04 15:00:15 +0100345} FIX_ALIASING;
Denis Vlasenko821cc252007-06-04 10:33:48 +0000346#define G (*(struct globals*)&bb_common_bufsiz1)
347#define pingsock (G.pingsock )
Denis Vlasenko821cc252007-06-04 10:33:48 +0000348#define if_index (G.if_index )
Denis Vlasenko1a7afb42007-10-19 21:39:25 +0000349#define source_lsa (G.source_lsa )
Denis Vlasenko59f502b2008-10-27 11:54:45 +0000350#define str_I (G.str_I )
Denis Vlasenko1a7afb42007-10-19 21:39:25 +0000351#define datalen (G.datalen )
Denis Vlasenko821cc252007-06-04 10:33:48 +0000352#define ntransmitted (G.ntransmitted)
353#define nreceived (G.nreceived )
354#define nrepeats (G.nrepeats )
355#define pingcount (G.pingcount )
Joachim Nilsson714e2b72010-11-28 23:01:18 +0100356#define opt_ttl (G.opt_ttl )
Denis Vlasenko821cc252007-06-04 10:33:48 +0000357#define myid (G.myid )
358#define tmin (G.tmin )
359#define tmax (G.tmax )
360#define tsum (G.tsum )
Denis Vlasenko90c31b32008-04-07 00:46:29 +0000361#define deadline (G.deadline )
362#define timeout (G.timeout )
363#define total_secs (G.total_secs )
Denis Vlasenko821cc252007-06-04 10:33:48 +0000364#define hostname (G.hostname )
365#define dotted (G.dotted )
366#define pingaddr (G.pingaddr )
367#define rcvd_tbl (G.rcvd_tbl )
368void BUG_ping_globals_too_big(void);
369#define INIT_G() do { \
Denis Vlasenko6b404432008-01-07 16:13:14 +0000370 if (sizeof(G) > COMMON_BUFSIZE) \
371 BUG_ping_globals_too_big(); \
Denis Vlasenko821cc252007-06-04 10:33:48 +0000372 pingsock = -1; \
Denis Vlasenko90c31b32008-04-07 00:46:29 +0000373 datalen = DEFDATALEN; \
374 timeout = MAXWAIT; \
Denis Vlasenko821cc252007-06-04 10:33:48 +0000375 tmin = UINT_MAX; \
376} while (0)
Eric Andersen19db07b1999-12-11 08:41:28 +0000377
Eric Andersen19db07b1999-12-11 08:41:28 +0000378
Denys Vlasenkoe4dcba12010-10-28 18:57:19 +0200379#define A(bit) rcvd_tbl[(bit)>>3] /* identify byte in array */
380#define B(bit) (1 << ((bit) & 0x07)) /* identify bit in byte */
381#define SET(bit) (A(bit) |= B(bit))
382#define CLR(bit) (A(bit) &= (~B(bit)))
383#define TST(bit) (A(bit) & B(bit))
Denis Vlasenko4a5cf162006-11-20 00:48:22 +0000384
Eric Andersen19db07b1999-12-11 08:41:28 +0000385/**************************************************************************/
386
Denis Vlasenkoa60f84e2008-07-05 09:18:54 +0000387static void print_stats_and_exit(int junk) NORETURN;
388static void print_stats_and_exit(int junk UNUSED_PARAM)
Erik Andersene49d5ec2000-02-08 19:58:47 +0000389{
390 signal(SIGINT, SIG_IGN);
391
Denis Vlasenkob9a279b2007-01-24 23:53:22 +0000392 printf("\n--- %s ping statistics ---\n", hostname);
Denis Vlasenko13858992006-10-08 12:49:22 +0000393 printf("%lu packets transmitted, ", ntransmitted);
394 printf("%lu packets received, ", nreceived);
Erik Andersene49d5ec2000-02-08 19:58:47 +0000395 if (nrepeats)
Denis Vlasenko13858992006-10-08 12:49:22 +0000396 printf("%lu duplicates, ", nrepeats);
Erik Andersene49d5ec2000-02-08 19:58:47 +0000397 if (ntransmitted)
Denis Vlasenkoaeb4bdd2007-01-25 00:00:02 +0000398 ntransmitted = (ntransmitted - nreceived) * 100 / ntransmitted;
Denis Vlasenkob9a279b2007-01-24 23:53:22 +0000399 printf("%lu%% packet loss\n", ntransmitted);
Denis Vlasenko76791452007-06-18 08:55:57 +0000400 if (tmin != UINT_MAX) {
401 unsigned tavg = tsum / (nreceived + nrepeats);
402 printf("round-trip min/avg/max = %u.%03u/%u.%03u/%u.%03u ms\n",
403 tmin / 1000, tmin % 1000,
404 tavg / 1000, tavg % 1000,
405 tmax / 1000, tmax % 1000);
406 }
Denis Vlasenko90c31b32008-04-07 00:46:29 +0000407 /* if condition is true, exit with 1 -- 'failure' */
408 exit(nreceived == 0 || (deadline && nreceived < pingcount));
Eric Andersen485b9551999-12-07 23:14:59 +0000409}
410
Denys Vlasenko281e7b82011-02-06 17:51:45 +0100411static void sendping_tail(void (*sp)(int), int size_pkt)
Denis Vlasenkoe9356022007-01-29 18:03:54 +0000412{
Denis Vlasenkoc8e99932007-02-09 18:14:42 +0000413 int sz;
414
415 CLR((uint16_t)ntransmitted % MAX_DUP_CHK);
416 ntransmitted++;
417
Denys Vlasenko281e7b82011-02-06 17:51:45 +0100418 size_pkt += datalen;
419
Denis Vlasenkoc8e99932007-02-09 18:14:42 +0000420 /* sizeof(pingaddr) can be larger than real sa size, but I think
421 * it doesn't matter */
Denys Vlasenko281e7b82011-02-06 17:51:45 +0100422 sz = xsendto(pingsock, G.snd_packet, size_pkt, &pingaddr.sa, sizeof(pingaddr));
Denis Vlasenkoc8e99932007-02-09 18:14:42 +0000423 if (sz != size_pkt)
Bernhard Reutner-Fischerb2908892007-04-12 11:34:39 +0000424 bb_error_msg_and_die(bb_msg_write_error);
Denis Vlasenkoe9356022007-01-29 18:03:54 +0000425
Denis Vlasenko90c31b32008-04-07 00:46:29 +0000426 if (pingcount == 0 || deadline || ntransmitted < pingcount) {
427 /* Didn't send all pings yet - schedule next in 1s */
428 signal(SIGALRM, sp);
429 if (deadline) {
430 total_secs += PINGINTERVAL;
431 if (total_secs >= deadline)
432 signal(SIGALRM, print_stats_and_exit);
433 }
Denis Vlasenkoe9356022007-01-29 18:03:54 +0000434 alarm(PINGINTERVAL);
Denis Vlasenko90c31b32008-04-07 00:46:29 +0000435 } else { /* -c NN, and all NN are sent (and no deadline) */
436 /* Wait for the last ping to come back.
437 * -W timeout: wait for a response in seconds.
438 * Affects only timeout in absense of any responses,
439 * otherwise ping waits for two RTTs. */
440 unsigned expire = timeout;
441
442 if (nreceived) {
443 /* approx. 2*tmax, in seconds (2 RTT) */
444 expire = tmax / (512*1024);
445 if (expire == 0)
446 expire = 1;
447 }
448 signal(SIGALRM, print_stats_and_exit);
449 alarm(expire);
Denis Vlasenkoe9356022007-01-29 18:03:54 +0000450 }
451}
452
Denis Vlasenkoa60f84e2008-07-05 09:18:54 +0000453static void sendping4(int junk UNUSED_PARAM)
Eric Andersen485b9551999-12-07 23:14:59 +0000454{
Denys Vlasenko9341fd22010-03-03 01:10:29 +0100455 struct icmp *pkt = G.snd_packet;
Eric Andersen485b9551999-12-07 23:14:59 +0000456
Denys Vlasenko9341fd22010-03-03 01:10:29 +0100457 //memset(pkt, 0, datalen + ICMP_MINLEN + 4); - G.snd_packet was xzalloced
Erik Andersene49d5ec2000-02-08 19:58:47 +0000458 pkt->icmp_type = ICMP_ECHO;
Denis Vlasenkob34266b2008-04-29 12:31:53 +0000459 /*pkt->icmp_code = 0;*/
Denys Vlasenko9341fd22010-03-03 01:10:29 +0100460 pkt->icmp_cksum = 0; /* cksum is calculated with this field set to 0 */
Denis Vlasenko919c10d2007-01-03 22:14:18 +0000461 pkt->icmp_seq = htons(ntransmitted); /* don't ++ here, it can be a macro */
Erik Andersene49d5ec2000-02-08 19:58:47 +0000462 pkt->icmp_id = myid;
Denis Vlasenko7b72fc12007-06-16 13:37:59 +0000463
Denys Vlasenko9341fd22010-03-03 01:10:29 +0100464 /* If datalen < 4, we store timestamp _past_ the packet,
465 * but it's ok - we allocated 4 extra bytes in xzalloc() just in case.
466 */
Denis Vlasenko76791452007-06-18 08:55:57 +0000467 /*if (datalen >= 4)*/
Denys Vlasenko9341fd22010-03-03 01:10:29 +0100468 /* No hton: we'll read it back on the same machine */
Denis Vlasenko76791452007-06-18 08:55:57 +0000469 *(uint32_t*)&pkt->icmp_dun = monotonic_us();
Denis Vlasenko7b72fc12007-06-16 13:37:59 +0000470
Baruch Siache8f36332011-09-07 17:52:37 +0200471 pkt->icmp_cksum = inet_cksum((uint16_t *) pkt, datalen + ICMP_MINLEN);
Eric Andersen485b9551999-12-07 23:14:59 +0000472
Denys Vlasenko281e7b82011-02-06 17:51:45 +0100473 sendping_tail(sendping4, ICMP_MINLEN);
Eric Andersen485b9551999-12-07 23:14:59 +0000474}
Denis Vlasenkob9a279b2007-01-24 23:53:22 +0000475#if ENABLE_PING6
Denis Vlasenkoa60f84e2008-07-05 09:18:54 +0000476static void sendping6(int junk UNUSED_PARAM)
Denis Vlasenkob9a279b2007-01-24 23:53:22 +0000477{
Denys Vlasenko1bb52a92011-02-05 03:58:43 +0100478 struct icmp6_hdr *pkt = G.snd_packet;
Denis Vlasenkob9a279b2007-01-24 23:53:22 +0000479
Denys Vlasenko9341fd22010-03-03 01:10:29 +0100480 //memset(pkt, 0, datalen + sizeof(struct icmp6_hdr) + 4);
Denis Vlasenkob9a279b2007-01-24 23:53:22 +0000481 pkt->icmp6_type = ICMP6_ECHO_REQUEST;
Denis Vlasenkob34266b2008-04-29 12:31:53 +0000482 /*pkt->icmp6_code = 0;*/
483 /*pkt->icmp6_cksum = 0;*/
Denis Vlasenkob9a279b2007-01-24 23:53:22 +0000484 pkt->icmp6_seq = htons(ntransmitted); /* don't ++ here, it can be a macro */
485 pkt->icmp6_id = myid;
Denis Vlasenko7b72fc12007-06-16 13:37:59 +0000486
Denis Vlasenko76791452007-06-18 08:55:57 +0000487 /*if (datalen >= 4)*/
488 *(uint32_t*)(&pkt->icmp6_data8[4]) = monotonic_us();
Denis Vlasenkob9a279b2007-01-24 23:53:22 +0000489
Baruch Siache8f36332011-09-07 17:52:37 +0200490 //TODO? pkt->icmp_cksum = inet_cksum(...);
Denys Vlasenko9341fd22010-03-03 01:10:29 +0100491
Denys Vlasenko281e7b82011-02-06 17:51:45 +0100492 sendping_tail(sendping6, sizeof(struct icmp6_hdr));
Denis Vlasenkob9a279b2007-01-24 23:53:22 +0000493}
494#endif
Erik Andersene49d5ec2000-02-08 19:58:47 +0000495
Denis Vlasenko89ef65f2007-01-29 23:43:18 +0000496static const char *icmp_type_name(int id)
Erik Andersen227a59b2000-04-25 23:24:55 +0000497{
498 switch (id) {
Denis Vlasenko35d4da02007-01-22 14:04:27 +0000499 case ICMP_ECHOREPLY: return "Echo Reply";
500 case ICMP_DEST_UNREACH: return "Destination Unreachable";
501 case ICMP_SOURCE_QUENCH: return "Source Quench";
502 case ICMP_REDIRECT: return "Redirect (change route)";
503 case ICMP_ECHO: return "Echo Request";
504 case ICMP_TIME_EXCEEDED: return "Time Exceeded";
505 case ICMP_PARAMETERPROB: return "Parameter Problem";
506 case ICMP_TIMESTAMP: return "Timestamp Request";
507 case ICMP_TIMESTAMPREPLY: return "Timestamp Reply";
508 case ICMP_INFO_REQUEST: return "Information Request";
509 case ICMP_INFO_REPLY: return "Information Reply";
510 case ICMP_ADDRESS: return "Address Mask Request";
511 case ICMP_ADDRESSREPLY: return "Address Mask Reply";
512 default: return "unknown ICMP type";
Erik Andersen227a59b2000-04-25 23:24:55 +0000513 }
514}
Denis Vlasenkob9a279b2007-01-24 23:53:22 +0000515#if ENABLE_PING6
516/* RFC3542 changed some definitions from RFC2292 for no good reason, whee!
517 * the newer 3542 uses a MLD_ prefix where as 2292 uses ICMP6_ prefix */
518#ifndef MLD_LISTENER_QUERY
519# define MLD_LISTENER_QUERY ICMP6_MEMBERSHIP_QUERY
520#endif
521#ifndef MLD_LISTENER_REPORT
522# define MLD_LISTENER_REPORT ICMP6_MEMBERSHIP_REPORT
523#endif
524#ifndef MLD_LISTENER_REDUCTION
525# define MLD_LISTENER_REDUCTION ICMP6_MEMBERSHIP_REDUCTION
526#endif
Denis Vlasenko89ef65f2007-01-29 23:43:18 +0000527static const char *icmp6_type_name(int id)
Denis Vlasenkob9a279b2007-01-24 23:53:22 +0000528{
529 switch (id) {
530 case ICMP6_DST_UNREACH: return "Destination Unreachable";
531 case ICMP6_PACKET_TOO_BIG: return "Packet too big";
532 case ICMP6_TIME_EXCEEDED: return "Time Exceeded";
533 case ICMP6_PARAM_PROB: return "Parameter Problem";
534 case ICMP6_ECHO_REPLY: return "Echo Reply";
535 case ICMP6_ECHO_REQUEST: return "Echo Request";
536 case MLD_LISTENER_QUERY: return "Listener Query";
537 case MLD_LISTENER_REPORT: return "Listener Report";
538 case MLD_LISTENER_REDUCTION: return "Listener Reduction";
539 default: return "unknown ICMP type";
540 }
541}
542#endif
Erik Andersen227a59b2000-04-25 23:24:55 +0000543
Denis Vlasenko76791452007-06-18 08:55:57 +0000544static void unpack_tail(int sz, uint32_t *tp,
Denis Vlasenko19c238b2007-03-03 00:36:35 +0000545 const char *from_str,
546 uint16_t recv_seq, int ttl)
547{
548 const char *dupmsg = " (DUP!)";
549 unsigned triptime = triptime; /* for gcc */
550
551 ++nreceived;
552
553 if (tp) {
Denis Vlasenko76791452007-06-18 08:55:57 +0000554 /* (int32_t) cast is for hypothetical 64-bit unsigned */
555 /* (doesn't hurt 32-bit real-world anyway) */
556 triptime = (int32_t) ((uint32_t)monotonic_us() - *tp);
Denis Vlasenko19c238b2007-03-03 00:36:35 +0000557 tsum += triptime;
558 if (triptime < tmin)
559 tmin = triptime;
560 if (triptime > tmax)
561 tmax = triptime;
562 }
563
564 if (TST(recv_seq % MAX_DUP_CHK)) {
565 ++nrepeats;
566 --nreceived;
567 } else {
568 SET(recv_seq % MAX_DUP_CHK);
569 dupmsg += 7;
570 }
571
572 if (option_mask32 & OPT_QUIET)
573 return;
574
575 printf("%d bytes from %s: seq=%u ttl=%d", sz,
576 from_str, recv_seq, ttl);
577 if (tp)
Denis Vlasenko76791452007-06-18 08:55:57 +0000578 printf(" time=%u.%03u ms", triptime / 1000, triptime % 1000);
Denis Vlasenko19c238b2007-03-03 00:36:35 +0000579 puts(dupmsg);
Denys Vlasenko8131eea2009-11-02 14:19:51 +0100580 fflush_all();
Denis Vlasenko19c238b2007-03-03 00:36:35 +0000581}
Denis Vlasenkoe9356022007-01-29 18:03:54 +0000582static void unpack4(char *buf, int sz, struct sockaddr_in *from)
Eric Andersen485b9551999-12-07 23:14:59 +0000583{
Erik Andersene49d5ec2000-02-08 19:58:47 +0000584 struct icmp *icmppkt;
585 struct iphdr *iphdr;
Denis Vlasenko19c238b2007-03-03 00:36:35 +0000586 int hlen;
Eric Andersen485b9551999-12-07 23:14:59 +0000587
Erik Andersene49d5ec2000-02-08 19:58:47 +0000588 /* discard if too short */
Pavel Roskin0024abc2000-06-07 20:38:15 +0000589 if (sz < (datalen + ICMP_MINLEN))
Erik Andersene49d5ec2000-02-08 19:58:47 +0000590 return;
Eric Andersen485b9551999-12-07 23:14:59 +0000591
Denis Vlasenko2cbe6e62006-09-02 16:17:30 +0000592 /* check IP header */
593 iphdr = (struct iphdr *) buf;
594 hlen = iphdr->ihl << 2;
Erik Andersene49d5ec2000-02-08 19:58:47 +0000595 sz -= hlen;
596 icmppkt = (struct icmp *) (buf + hlen);
Erik Andersen227a59b2000-04-25 23:24:55 +0000597 if (icmppkt->icmp_id != myid)
Denis Vlasenkocb6874c2006-09-02 16:13:36 +0000598 return; /* not our ping */
Erik Andersen227a59b2000-04-25 23:24:55 +0000599
Erik Andersene49d5ec2000-02-08 19:58:47 +0000600 if (icmppkt->icmp_type == ICMP_ECHOREPLY) {
Denis Vlasenko35d4da02007-01-22 14:04:27 +0000601 uint16_t recv_seq = ntohs(icmppkt->icmp_seq);
Denis Vlasenko76791452007-06-18 08:55:57 +0000602 uint32_t *tp = NULL;
Erik Andersene49d5ec2000-02-08 19:58:47 +0000603
Denis Vlasenko76791452007-06-18 08:55:57 +0000604 if (sz >= ICMP_MINLEN + sizeof(uint32_t))
605 tp = (uint32_t *) icmppkt->icmp_data;
Denis Vlasenko19c238b2007-03-03 00:36:35 +0000606 unpack_tail(sz, tp,
607 inet_ntoa(*(struct in_addr *) &from->sin_addr.s_addr),
608 recv_seq, iphdr->ttl);
609 } else if (icmppkt->icmp_type != ICMP_ECHO) {
610 bb_error_msg("warning: got ICMP %d (%s)",
611 icmppkt->icmp_type,
612 icmp_type_name(icmppkt->icmp_type));
Denis Vlasenko35d4da02007-01-22 14:04:27 +0000613 }
Eric Andersen485b9551999-12-07 23:14:59 +0000614}
Denis Vlasenkob9a279b2007-01-24 23:53:22 +0000615#if ENABLE_PING6
Denys Vlasenko5126cf92011-09-11 20:27:28 +0200616static void unpack6(char *packet, int sz, struct sockaddr_in6 *from, int hoplimit)
Denis Vlasenkob9a279b2007-01-24 23:53:22 +0000617{
618 struct icmp6_hdr *icmppkt;
Denis Vlasenkob9a279b2007-01-24 23:53:22 +0000619 char buf[INET6_ADDRSTRLEN];
Eric Andersen485b9551999-12-07 23:14:59 +0000620
Denis Vlasenkob9a279b2007-01-24 23:53:22 +0000621 /* discard if too short */
622 if (sz < (datalen + sizeof(struct icmp6_hdr)))
623 return;
624
625 icmppkt = (struct icmp6_hdr *) packet;
626 if (icmppkt->icmp6_id != myid)
627 return; /* not our ping */
628
629 if (icmppkt->icmp6_type == ICMP6_ECHO_REPLY) {
630 uint16_t recv_seq = ntohs(icmppkt->icmp6_seq);
Denis Vlasenko76791452007-06-18 08:55:57 +0000631 uint32_t *tp = NULL;
Denis Vlasenkob9a279b2007-01-24 23:53:22 +0000632
Denis Vlasenko76791452007-06-18 08:55:57 +0000633 if (sz >= sizeof(struct icmp6_hdr) + sizeof(uint32_t))
634 tp = (uint32_t *) &icmppkt->icmp6_data8[4];
Denis Vlasenko19c238b2007-03-03 00:36:35 +0000635 unpack_tail(sz, tp,
Denys Vlasenko5126cf92011-09-11 20:27:28 +0200636 inet_ntop(AF_INET6, &from->sin6_addr,
Denis Vlasenko19c238b2007-03-03 00:36:35 +0000637 buf, sizeof(buf)),
638 recv_seq, hoplimit);
639 } else if (icmppkt->icmp6_type != ICMP6_ECHO_REQUEST) {
640 bb_error_msg("warning: got ICMP %d (%s)",
641 icmppkt->icmp6_type,
642 icmp6_type_name(icmppkt->icmp6_type));
Denis Vlasenkob9a279b2007-01-24 23:53:22 +0000643 }
Denis Vlasenkob9a279b2007-01-24 23:53:22 +0000644}
645#endif
646
Denis Vlasenkoe9356022007-01-29 18:03:54 +0000647static void ping4(len_and_sockaddr *lsa)
Eric Andersen485b9551999-12-07 23:14:59 +0000648{
Erik Andersene49d5ec2000-02-08 19:58:47 +0000649 int sockopt;
650
Matt Kraai06ef1652001-07-13 20:56:27 +0000651 pingsock = create_icmp_socket();
Bernhard Reutner-Fischer8c69afd2008-01-29 10:33:34 +0000652 pingaddr.sin = lsa->u.sin;
Denis Vlasenko5ad10482007-06-19 22:54:21 +0000653 if (source_lsa) {
654 if (setsockopt(pingsock, IPPROTO_IP, IP_MULTICAST_IF,
Bernhard Reutner-Fischer8c69afd2008-01-29 10:33:34 +0000655 &source_lsa->u.sa, source_lsa->len))
Denis Vlasenko5ad10482007-06-19 22:54:21 +0000656 bb_error_msg_and_die("can't set multicast source interface");
Bernhard Reutner-Fischer8c69afd2008-01-29 10:33:34 +0000657 xbind(pingsock, &source_lsa->u.sa, source_lsa->len);
Denis Vlasenko5ad10482007-06-19 22:54:21 +0000658 }
Denis Vlasenko59f502b2008-10-27 11:54:45 +0000659 if (str_I)
Denis Vlasenkoe5373852008-12-10 11:12:16 +0000660 setsockopt_bindtodevice(pingsock, str_I);
Denis Vlasenko2cbe6e62006-09-02 16:17:30 +0000661
Erik Andersene49d5ec2000-02-08 19:58:47 +0000662 /* enable broadcast pings */
Denis Vlasenko48237b02006-11-22 23:22:06 +0000663 setsockopt_broadcast(pingsock);
Erik Andersene49d5ec2000-02-08 19:58:47 +0000664
Denis Vlasenko57707152008-08-24 00:02:18 +0000665 /* set recv buf (needed if we can get lots of responses: flood ping,
666 * broadcast ping etc) */
667 sockopt = (datalen * 2) + 7 * 1024; /* giving it a bit of extra room */
Denis Vlasenko703e2022007-01-22 14:12:08 +0000668 setsockopt(pingsock, SOL_SOCKET, SO_RCVBUF, &sockopt, sizeof(sockopt));
Erik Andersene49d5ec2000-02-08 19:58:47 +0000669
Denys Vlasenko3c8799b2010-11-29 12:07:12 +0100670 if (opt_ttl != 0) {
Joachim Nilsson714e2b72010-11-28 23:01:18 +0100671 setsockopt(pingsock, IPPROTO_IP, IP_TTL, &opt_ttl, sizeof(opt_ttl));
Denys Vlasenko3c8799b2010-11-29 12:07:12 +0100672 /* above doesnt affect packets sent to bcast IP, so... */
673 setsockopt(pingsock, IPPROTO_IP, IP_MULTICAST_TTL, &opt_ttl, sizeof(opt_ttl));
674 }
Joachim Nilsson714e2b72010-11-28 23:01:18 +0100675
Denis Vlasenko90c31b32008-04-07 00:46:29 +0000676 signal(SIGINT, print_stats_and_exit);
Erik Andersene49d5ec2000-02-08 19:58:47 +0000677
678 /* start the ping's going ... */
Denis Vlasenkoe9356022007-01-29 18:03:54 +0000679 sendping4(0);
Erik Andersene49d5ec2000-02-08 19:58:47 +0000680
681 /* listen for replies */
682 while (1) {
683 struct sockaddr_in from;
Erik Andersen1d1d9502000-04-21 01:26:49 +0000684 socklen_t fromlen = (socklen_t) sizeof(from);
Erik Andersene49d5ec2000-02-08 19:58:47 +0000685 int c;
686
Denys Vlasenko9341fd22010-03-03 01:10:29 +0100687 c = recvfrom(pingsock, G.rcv_packet, G.sizeof_rcv_packet, 0,
Denis Vlasenko44c2eb22007-01-08 23:55:33 +0000688 (struct sockaddr *) &from, &fromlen);
689 if (c < 0) {
690 if (errno != EINTR)
691 bb_perror_msg("recvfrom");
Erik Andersene49d5ec2000-02-08 19:58:47 +0000692 continue;
693 }
Denys Vlasenko9341fd22010-03-03 01:10:29 +0100694 unpack4(G.rcv_packet, c, &from);
Denis Vlasenko90c31b32008-04-07 00:46:29 +0000695 if (pingcount && nreceived >= pingcount)
Erik Andersene49d5ec2000-02-08 19:58:47 +0000696 break;
697 }
Eric Andersen485b9551999-12-07 23:14:59 +0000698}
Denis Vlasenkob9a279b2007-01-24 23:53:22 +0000699#if ENABLE_PING6
700extern int BUG_bad_offsetof_icmp6_cksum(void);
701static void ping6(len_and_sockaddr *lsa)
702{
Denis Vlasenkob9a279b2007-01-24 23:53:22 +0000703 int sockopt;
704 struct msghdr msg;
705 struct sockaddr_in6 from;
706 struct iovec iov;
707 char control_buf[CMSG_SPACE(36)];
708
709 pingsock = create_icmp6_socket();
Bernhard Reutner-Fischer8c69afd2008-01-29 10:33:34 +0000710 pingaddr.sin6 = lsa->u.sin6;
Denis Vlasenko9ca26d32007-02-09 17:32:16 +0000711 /* untested whether "-I addr" really works for IPv6: */
712 if (source_lsa)
Bernhard Reutner-Fischer8c69afd2008-01-29 10:33:34 +0000713 xbind(pingsock, &source_lsa->u.sa, source_lsa->len);
Denis Vlasenko59f502b2008-10-27 11:54:45 +0000714 if (str_I)
Denis Vlasenkoe5373852008-12-10 11:12:16 +0000715 setsockopt_bindtodevice(pingsock, str_I);
Denis Vlasenkob9a279b2007-01-24 23:53:22 +0000716
717#ifdef ICMP6_FILTER
718 {
719 struct icmp6_filter filt;
720 if (!(option_mask32 & OPT_VERBOSE)) {
721 ICMP6_FILTER_SETBLOCKALL(&filt);
722 ICMP6_FILTER_SETPASS(ICMP6_ECHO_REPLY, &filt);
723 } else {
724 ICMP6_FILTER_SETPASSALL(&filt);
725 }
726 if (setsockopt(pingsock, IPPROTO_ICMPV6, ICMP6_FILTER, &filt,
727 sizeof(filt)) < 0)
728 bb_error_msg_and_die("setsockopt(ICMP6_FILTER)");
729 }
730#endif /*ICMP6_FILTER*/
731
732 /* enable broadcast pings */
733 setsockopt_broadcast(pingsock);
734
Denis Vlasenko57707152008-08-24 00:02:18 +0000735 /* set recv buf (needed if we can get lots of responses: flood ping,
736 * broadcast ping etc) */
737 sockopt = (datalen * 2) + 7 * 1024; /* giving it a bit of extra room */
Denis Vlasenkob9a279b2007-01-24 23:53:22 +0000738 setsockopt(pingsock, SOL_SOCKET, SO_RCVBUF, &sockopt, sizeof(sockopt));
739
740 sockopt = offsetof(struct icmp6_hdr, icmp6_cksum);
741 if (offsetof(struct icmp6_hdr, icmp6_cksum) != 2)
742 BUG_bad_offsetof_icmp6_cksum();
743 setsockopt(pingsock, SOL_RAW, IPV6_CHECKSUM, &sockopt, sizeof(sockopt));
744
745 /* request ttl info to be returned in ancillary data */
746 setsockopt(pingsock, SOL_IPV6, IPV6_HOPLIMIT, &const_int_1, sizeof(const_int_1));
747
748 if (if_index)
Denis Vlasenkoaeb4bdd2007-01-25 00:00:02 +0000749 pingaddr.sin6.sin6_scope_id = if_index;
Denis Vlasenkob9a279b2007-01-24 23:53:22 +0000750
Denis Vlasenko90c31b32008-04-07 00:46:29 +0000751 signal(SIGINT, print_stats_and_exit);
Denis Vlasenkob9a279b2007-01-24 23:53:22 +0000752
753 /* start the ping's going ... */
754 sendping6(0);
755
756 /* listen for replies */
757 msg.msg_name = &from;
758 msg.msg_namelen = sizeof(from);
759 msg.msg_iov = &iov;
760 msg.msg_iovlen = 1;
761 msg.msg_control = control_buf;
Denys Vlasenko9341fd22010-03-03 01:10:29 +0100762 iov.iov_base = G.rcv_packet;
763 iov.iov_len = G.sizeof_rcv_packet;
Denis Vlasenkob9a279b2007-01-24 23:53:22 +0000764 while (1) {
765 int c;
766 struct cmsghdr *mp;
767 int hoplimit = -1;
768 msg.msg_controllen = sizeof(control_buf);
769
770 c = recvmsg(pingsock, &msg, 0);
771 if (c < 0) {
772 if (errno != EINTR)
773 bb_perror_msg("recvfrom");
774 continue;
775 }
776 for (mp = CMSG_FIRSTHDR(&msg); mp; mp = CMSG_NXTHDR(&msg, mp)) {
777 if (mp->cmsg_level == SOL_IPV6
778 && mp->cmsg_type == IPV6_HOPLIMIT
779 /* don't check len - we trust the kernel: */
780 /* && mp->cmsg_len >= CMSG_LEN(sizeof(int)) */
781 ) {
Denys Vlasenko57be1ee2009-11-26 15:26:31 +0100782 /*hoplimit = *(int*)CMSG_DATA(mp); - unaligned access */
783 move_from_unaligned_int(hoplimit, CMSG_DATA(mp));
Denis Vlasenkob9a279b2007-01-24 23:53:22 +0000784 }
785 }
Denys Vlasenko5126cf92011-09-11 20:27:28 +0200786 unpack6(G.rcv_packet, c, &from, hoplimit);
Denis Vlasenko90c31b32008-04-07 00:46:29 +0000787 if (pingcount && nreceived >= pingcount)
Denis Vlasenkob9a279b2007-01-24 23:53:22 +0000788 break;
789 }
790}
791#endif
Eric Andersen485b9551999-12-07 23:14:59 +0000792
Denis Vlasenko9ca26d32007-02-09 17:32:16 +0000793static void ping(len_and_sockaddr *lsa)
Denis Vlasenko2cbe6e62006-09-02 16:17:30 +0000794{
Denis Vlasenko9ca26d32007-02-09 17:32:16 +0000795 printf("PING %s (%s)", hostname, dotted);
796 if (source_lsa) {
797 printf(" from %s",
Bernhard Reutner-Fischer8c69afd2008-01-29 10:33:34 +0000798 xmalloc_sockaddr2dotted_noport(&source_lsa->u.sa));
Denis Vlasenko2cbe6e62006-09-02 16:17:30 +0000799 }
Denis Vlasenko9ca26d32007-02-09 17:32:16 +0000800 printf(": %d data bytes\n", datalen);
801
Denys Vlasenko9341fd22010-03-03 01:10:29 +0100802 G.sizeof_rcv_packet = datalen + MAXIPLEN + MAXICMPLEN;
803 G.rcv_packet = xzalloc(G.sizeof_rcv_packet);
Denis Vlasenko9ca26d32007-02-09 17:32:16 +0000804#if ENABLE_PING6
Denys Vlasenko9341fd22010-03-03 01:10:29 +0100805 if (lsa->u.sa.sa_family == AF_INET6) {
806 /* +4 reserves a place for timestamp, which may end up sitting
807 * _after_ packet. Saves one if() - see sendping4/6() */
808 G.snd_packet = xzalloc(datalen + sizeof(struct icmp6_hdr) + 4);
Denis Vlasenko9ca26d32007-02-09 17:32:16 +0000809 ping6(lsa);
Denys Vlasenko9341fd22010-03-03 01:10:29 +0100810 } else
Denis Vlasenko9ca26d32007-02-09 17:32:16 +0000811#endif
Denys Vlasenko9341fd22010-03-03 01:10:29 +0100812 {
813 G.snd_packet = xzalloc(datalen + ICMP_MINLEN + 4);
Denis Vlasenko9ca26d32007-02-09 17:32:16 +0000814 ping4(lsa);
Denys Vlasenko9341fd22010-03-03 01:10:29 +0100815 }
Denis Vlasenko2cbe6e62006-09-02 16:17:30 +0000816}
817
Denys Vlasenkoad7d94b2009-11-20 18:12:12 +0100818static int common_ping_main(int opt, char **argv)
Eric Andersen485b9551999-12-07 23:14:59 +0000819{
Denis Vlasenkoaeb4bdd2007-01-25 00:00:02 +0000820 len_and_sockaddr *lsa;
Denis Vlasenko59f502b2008-10-27 11:54:45 +0000821 char *str_s;
Eric Andersen485b9551999-12-07 23:14:59 +0000822
Denis Vlasenko821cc252007-06-04 10:33:48 +0000823 INIT_G();
824
Joachim Nilsson714e2b72010-11-28 23:01:18 +0100825 /* exactly one argument needed; -v and -q don't mix; -c NUM, -t NUM, -w NUM, -W NUM */
826 opt_complementary = "=1:q--v:v--q:c+:t+:w+:W+";
827 opt |= getopt32(argv, OPT_STRING, &pingcount, &str_s, &opt_ttl, &deadline, &timeout, &str_I);
Denis Vlasenko59f502b2008-10-27 11:54:45 +0000828 if (opt & OPT_s)
829 datalen = xatou16(str_s); // -s
830 if (opt & OPT_I) { // -I
831 if_index = if_nametoindex(str_I);
Denis Vlasenko9ca26d32007-02-09 17:32:16 +0000832 if (!if_index) {
833 /* TODO: I'm not sure it takes IPv6 unless in [XX:XX..] format */
Denis Vlasenko59f502b2008-10-27 11:54:45 +0000834 source_lsa = xdotted2sockaddr(str_I, 0);
835 str_I = NULL; /* don't try to bind to device later */
Denis Vlasenko9ca26d32007-02-09 17:32:16 +0000836 }
Erik Andersene49d5ec2000-02-08 19:58:47 +0000837 }
Denis Vlasenko1c9ad622007-05-27 00:53:41 +0000838 myid = (uint16_t) getpid();
Denis Vlasenkob9a279b2007-01-24 23:53:22 +0000839 hostname = argv[optind];
840#if ENABLE_PING6
Denis Vlasenko59f502b2008-10-27 11:54:45 +0000841 {
842 sa_family_t af = AF_UNSPEC;
843 if (opt & OPT_IPV4)
844 af = AF_INET;
845 if (opt & OPT_IPV6)
846 af = AF_INET6;
847 lsa = xhost_and_af2sockaddr(hostname, 0, af);
848 }
Denis Vlasenkob9a279b2007-01-24 23:53:22 +0000849#else
Denis Vlasenko42823d52007-02-04 02:39:08 +0000850 lsa = xhost_and_af2sockaddr(hostname, 0, AF_INET);
Denis Vlasenkob9a279b2007-01-24 23:53:22 +0000851#endif
Denis Vlasenko9ca26d32007-02-09 17:32:16 +0000852
Bernhard Reutner-Fischer8c69afd2008-01-29 10:33:34 +0000853 if (source_lsa && source_lsa->u.sa.sa_family != lsa->u.sa.sa_family)
Denis Vlasenko9ca26d32007-02-09 17:32:16 +0000854 /* leaking it here... */
855 source_lsa = NULL;
856
Bernhard Reutner-Fischer8c69afd2008-01-29 10:33:34 +0000857 dotted = xmalloc_sockaddr2dotted_noport(&lsa->u.sa);
Denis Vlasenko9ca26d32007-02-09 17:32:16 +0000858 ping(lsa);
Bernhard Reutner-Fischer636a1f82008-05-19 09:29:47 +0000859 print_stats_and_exit(EXIT_SUCCESS);
Denis Vlasenko90c31b32008-04-07 00:46:29 +0000860 /*return EXIT_SUCCESS;*/
Eric Andersen485b9551999-12-07 23:14:59 +0000861}
Denis Vlasenkob9a279b2007-01-24 23:53:22 +0000862#endif /* FEATURE_FANCY_PING */
863
864
Denys Vlasenkoad7d94b2009-11-20 18:12:12 +0100865int ping_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
866int ping_main(int argc UNUSED_PARAM, char **argv)
867{
868#if !ENABLE_FEATURE_FANCY_PING
869 return common_ping_main(AF_UNSPEC, argv);
870#else
871 return common_ping_main(0, argv);
872#endif
873}
874
Denis Vlasenkob9a279b2007-01-24 23:53:22 +0000875#if ENABLE_PING6
Denis Vlasenko9b49a5e2007-10-11 10:05:36 +0000876int ping6_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
Denis Vlasenko59f502b2008-10-27 11:54:45 +0000877int ping6_main(int argc UNUSED_PARAM, char **argv)
Denis Vlasenkob9a279b2007-01-24 23:53:22 +0000878{
Denys Vlasenkoad7d94b2009-11-20 18:12:12 +0100879# if !ENABLE_FEATURE_FANCY_PING
880 return common_ping_main(AF_INET6, argv);
881# else
882 return common_ping_main(OPT_IPV6, argv);
883# endif
Denis Vlasenkob9a279b2007-01-24 23:53:22 +0000884}
885#endif
886
887/* from ping6.c:
888 * Copyright (c) 1989 The Regents of the University of California.
889 * All rights reserved.
890 *
891 * This code is derived from software contributed to Berkeley by
892 * Mike Muuss.
893 *
894 * Redistribution and use in source and binary forms, with or without
895 * modification, are permitted provided that the following conditions
896 * are met:
897 * 1. Redistributions of source code must retain the above copyright
898 * notice, this list of conditions and the following disclaimer.
899 * 2. Redistributions in binary form must reproduce the above copyright
900 * notice, this list of conditions and the following disclaimer in the
901 * documentation and/or other materials provided with the distribution.
902 *
903 * 3. <BSD Advertising Clause omitted per the July 22, 1999 licensing change
904 * ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change>
905 *
906 * 4. Neither the name of the University nor the names of its contributors
907 * may be used to endorse or promote products derived from this software
908 * without specific prior written permission.
909 *
910 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
911 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
912 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
913 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
914 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
915 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
916 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
917 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
918 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
919 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
920 * SUCH DAMAGE.
921 */