ping.c revision 92806
11558Srgrimes/* 21558Srgrimes * Copyright (c) 1989, 1993 31558Srgrimes * The Regents of the University of California. All rights reserved. 41558Srgrimes * 51558Srgrimes * This code is derived from software contributed to Berkeley by 61558Srgrimes * Mike Muuss. 71558Srgrimes * 81558Srgrimes * Redistribution and use in source and binary forms, with or without 91558Srgrimes * modification, are permitted provided that the following conditions 101558Srgrimes * are met: 111558Srgrimes * 1. Redistributions of source code must retain the above copyright 121558Srgrimes * notice, this list of conditions and the following disclaimer. 131558Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 141558Srgrimes * notice, this list of conditions and the following disclaimer in the 151558Srgrimes * documentation and/or other materials provided with the distribution. 161558Srgrimes * 3. All advertising materials mentioning features or use of this software 171558Srgrimes * must display the following acknowledgement: 181558Srgrimes * This product includes software developed by the University of 191558Srgrimes * California, Berkeley and its contributors. 201558Srgrimes * 4. Neither the name of the University nor the names of its contributors 211558Srgrimes * may be used to endorse or promote products derived from this software 221558Srgrimes * without specific prior written permission. 231558Srgrimes * 241558Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 251558Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 261558Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 271558Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 281558Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 291558Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 301558Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 311558Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 321558Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 331558Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 341558Srgrimes * SUCH DAMAGE. 351558Srgrimes */ 361558Srgrimes 371558Srgrimes#ifndef lint 3823247Swollmanstatic const char copyright[] = 391558Srgrimes"@(#) Copyright (c) 1989, 1993\n\ 401558Srgrimes The Regents of the University of California. All rights reserved.\n"; 411558Srgrimes#endif /* not lint */ 421558Srgrimes 431558Srgrimes#ifndef lint 4437671Scharnier#if 0 451558Srgrimesstatic char sccsid[] = "@(#)ping.c 8.1 (Berkeley) 6/5/93"; 4637671Scharnier#endif 4723247Swollmanstatic const char rcsid[] = 4850476Speter "$FreeBSD: head/sbin/ping/ping.c 92806 2002-03-20 17:55:10Z obrien $"; 491558Srgrimes#endif /* not lint */ 501558Srgrimes 511558Srgrimes/* 521558Srgrimes * P I N G . C 531558Srgrimes * 5437671Scharnier * Using the Internet Control Message Protocol (ICMP) "ECHO" facility, 551558Srgrimes * measure round-trip-delays and packet loss across network paths. 561558Srgrimes * 571558Srgrimes * Author - 581558Srgrimes * Mike Muuss 591558Srgrimes * U. S. Army Ballistic Research Laboratory 601558Srgrimes * December, 1983 611558Srgrimes * 621558Srgrimes * Status - 631558Srgrimes * Public Domain. Distribution Unlimited. 641558Srgrimes * Bugs - 651558Srgrimes * More statistics could always be gathered. 661558Srgrimes * This program has to run SUID to ROOT to access the ICMP socket. 671558Srgrimes */ 681558Srgrimes 6923247Swollman#include <sys/param.h> /* NB: we rely on this for <sys/types.h> */ 7023247Swollman 7123247Swollman#include <ctype.h> 7223247Swollman#include <err.h> 7323247Swollman#include <errno.h> 7427508Swollman#include <math.h> 7523247Swollman#include <netdb.h> 7623247Swollman#include <signal.h> 7723247Swollman#include <stdio.h> 7823247Swollman#include <stdlib.h> 7923247Swollman#include <string.h> 8023247Swollman#include <sysexits.h> 8123247Swollman#include <termios.h> 8223247Swollman#include <unistd.h> 8323247Swollman 841558Srgrimes#include <sys/socket.h> 851558Srgrimes#include <sys/time.h> 8636378Sfenner#include <sys/uio.h> 871558Srgrimes 8823247Swollman#include <netinet/in.h> 891558Srgrimes#include <netinet/in_systm.h> 901558Srgrimes#include <netinet/ip.h> 911558Srgrimes#include <netinet/ip_icmp.h> 921558Srgrimes#include <netinet/ip_var.h> 9323247Swollman#include <arpa/inet.h> 941558Srgrimes 9555505Sshin#ifdef IPSEC 9655505Sshin#include <netinet6/ipsec.h> 9755505Sshin#endif /*IPSEC*/ 9855505Sshin 9936089Sjb#define PHDR_LEN sizeof(struct timeval) 10036089Sjb#define DEFDATALEN (64 - PHDR_LEN) /* default data length */ 10127533Sbde#define FLOOD_BACKOFF 20000 /* usecs to back off if F_FLOOD mode */ 10227533Sbde /* runs out of buffer space */ 1031558Srgrimes#define MAXIPLEN 60 1041558Srgrimes#define MAXICMPLEN 76 1051558Srgrimes#define MAXPACKET (65536 - 60 - 8)/* max packet size */ 1061558Srgrimes#define MAXWAIT 10 /* max seconds to wait for response */ 10756342Sbillf#define MAXALARM (60 * 60) /* max seconds for alarm timeout */ 1081558Srgrimes#define NROUTES 9 /* number of record route slots */ 1091558Srgrimes 1101558Srgrimes#define A(bit) rcvd_tbl[(bit)>>3] /* identify byte in array */ 1111558Srgrimes#define B(bit) (1 << ((bit) & 0x07)) /* identify bit in byte */ 1121558Srgrimes#define SET(bit) (A(bit) |= B(bit)) 1131558Srgrimes#define CLR(bit) (A(bit) &= (~B(bit))) 1141558Srgrimes#define TST(bit) (A(bit) & B(bit)) 1151558Srgrimes 1161558Srgrimes/* various options */ 1171558Srgrimesint options; 11820540Sfenner#define F_FLOOD 0x0001 11920540Sfenner#define F_INTERVAL 0x0002 12020540Sfenner#define F_NUMERIC 0x0004 12120540Sfenner#define F_PINGFILLED 0x0008 12220540Sfenner#define F_QUIET 0x0010 12320540Sfenner#define F_RROUTE 0x0020 12420540Sfenner#define F_SO_DEBUG 0x0040 12520540Sfenner#define F_SO_DONTROUTE 0x0080 12620540Sfenner#define F_VERBOSE 0x0100 12720540Sfenner#define F_QUIET2 0x0200 12820540Sfenner#define F_NOLOOP 0x0400 12920540Sfenner#define F_MTTL 0x0800 13020540Sfenner#define F_MIF 0x1000 13122417Sdanny#define F_AUDIBLE 0x2000 13255505Sshin#ifdef IPSEC 13355505Sshin#ifdef IPSEC_POLICY_IPSEC 13455505Sshin#define F_POLICY 0x4000 13555505Sshin#endif /*IPSEC_POLICY_IPSEC*/ 13655505Sshin#endif /*IPSEC*/ 13774029Sru#define F_TTL 0x8000 13877119Sphk#define F_MISSED 0x10000 1391558Srgrimes 1401558Srgrimes/* 1411558Srgrimes * MAX_DUP_CHK is the number of bits in received table, i.e. the maximum 1421558Srgrimes * number of received sequence numbers we can keep track of. Change 128 1431558Srgrimes * to 8192 for complete accuracy... 1441558Srgrimes */ 1451558Srgrimes#define MAX_DUP_CHK (8 * 128) 1461558Srgrimesint mx_dup_ck = MAX_DUP_CHK; 1471558Srgrimeschar rcvd_tbl[MAX_DUP_CHK / 8]; 1481558Srgrimes 14979403Smjacobstruct sockaddr_in whereto; /* who to ping */ 1501558Srgrimesint datalen = DEFDATALEN; 1511558Srgrimesint s; /* socket file descriptor */ 1521558Srgrimesu_char outpack[MAXPACKET]; 1531558Srgrimeschar BSPACE = '\b'; /* characters written for flood */ 15477119Sphkchar BBELL = '\a'; /* characters written for MISSED and AUDIBLE */ 1551558Srgrimeschar DOT = '.'; 1561558Srgrimeschar *hostname; 15742337Simpchar *shostname; 1581558Srgrimesint ident; /* process id to identify our packets */ 15923295Simpint uid; /* cached uid for micro-optimization */ 1601558Srgrimes 1611558Srgrimes/* counters */ 1621558Srgrimeslong npackets; /* max packets to transmit */ 1631558Srgrimeslong nreceived; /* # of packets we got back */ 1641558Srgrimeslong nrepeats; /* number of duplicates */ 1651558Srgrimeslong ntransmitted; /* sequence # for outbound packets = #sent */ 16683940Siedowselong nmissedmax; /* max value of ntransmitted - nreceived - 1 */ 16738549Sdillonint interval = 1000; /* interval between packets, ms */ 1681558Srgrimes 1691558Srgrimes/* timing */ 1701558Srgrimesint timing; /* flag to do timing */ 1711558Srgrimesdouble tmin = 999999999.0; /* minimum round trip time */ 1721558Srgrimesdouble tmax = 0.0; /* maximum round trip time */ 1731558Srgrimesdouble tsum = 0.0; /* sum of all times, for doing average */ 17427508Swollmandouble tsumsq = 0.0; /* sum of all times squared, for std. dev. */ 1751558Srgrimes 17627533Sbdevolatile sig_atomic_t finish_up; /* nonzero if we've been told to finish up */ 1773792Ssefint reset_kerninfo; 17827533Sbdevolatile sig_atomic_t siginfo_p; 1793792Ssef 18023247Swollmanstatic void fill(char *, char *); 18123247Swollmanstatic u_short in_cksum(u_short *, int); 18223247Swollmanstatic void check_status(void); 18327533Sbdestatic void finish(void) __dead2; 18423247Swollmanstatic void pinger(void); 18523247Swollmanstatic char *pr_addr(struct in_addr); 18623247Swollmanstatic void pr_icmph(struct icmp *); 18723247Swollmanstatic void pr_iph(struct ip *); 18836378Sfennerstatic void pr_pack(char *, int, struct sockaddr_in *, struct timeval *); 18923247Swollmanstatic void pr_retip(struct ip *); 19023247Swollmanstatic void status(int); 19127533Sbdestatic void stopit(int); 19223247Swollmanstatic void tvsub(struct timeval *, struct timeval *); 19337671Scharnierstatic void usage(void) __dead2; 1941558Srgrimes 19523247Swollmanint 1961558Srgrimesmain(argc, argv) 1971558Srgrimes int argc; 19823247Swollman char *const *argv; 1991558Srgrimes{ 20036378Sfenner struct timeval last, intvl; 2011558Srgrimes struct hostent *hp; 20242337Simp struct sockaddr_in *to, sin; 2033792Ssef struct termios ts; 20492806Sobrien int i; 20574029Sru int ch, hold, packlen, preload, sockerrno, almost_done = 0, ttl; 20620540Sfenner struct in_addr ifaddr; 20774029Sru unsigned char mttl, loop; 2081558Srgrimes u_char *datap, *packet; 20942337Simp char *source = NULL, *target, hnamebuf[MAXHOSTNAMELEN]; 21042337Simp char snamebuf[MAXHOSTNAMELEN]; 21123247Swollman char *ep; 21223247Swollman u_long ultmp; 2131558Srgrimes#ifdef IP_OPTIONS 2141558Srgrimes char rspace[3 + 4 * NROUTES + 1]; /* record route space */ 2151558Srgrimes#endif 21620195Ssef struct sigaction si_sa; 21736378Sfenner struct iovec iov; 21836378Sfenner struct msghdr msg; 21936378Sfenner struct sockaddr_in from; 22057719Sshin char ctrl[CMSG_SPACE(sizeof(struct timeval))]; 22155505Sshin#ifdef IPSEC_POLICY_IPSEC 22255505Sshin char *policy_in = NULL; 22355505Sshin char *policy_out = NULL; 22455505Sshin#endif 22556342Sbillf unsigned long alarmtimeout; 2261558Srgrimes 22717474Sfenner /* 22817474Sfenner * Do the stuff that we need root priv's for *first*, and 22917474Sfenner * then drop our setuid bit. Save error reporting for 23017474Sfenner * after arg parsing. 23117474Sfenner */ 23223247Swollman s = socket(AF_INET, SOCK_RAW, IPPROTO_ICMP); 23323247Swollman sockerrno = errno; 23417474Sfenner 23517474Sfenner setuid(getuid()); 23623295Simp uid = getuid(); 23717474Sfenner 23856342Sbillf alarmtimeout = preload = 0; 2393792Ssef 24036089Sjb datap = &outpack[8 + PHDR_LEN]; 24174029Sru while ((ch = getopt(argc, argv, 24277119Sphk "AI:LQRS:T:c:adfi:l:m:np:qrs:t:v" 24374029Sru#ifdef IPSEC 24455505Sshin#ifdef IPSEC_POLICY_IPSEC 24574029Sru "P:" 24655505Sshin#endif /*IPSEC_POLICY_IPSEC*/ 24774029Sru#endif /*IPSEC*/ 24874029Sru )) != -1) 24955505Sshin { 2501558Srgrimes switch(ch) { 25177119Sphk case 'A': 25277119Sphk options |= F_MISSED; 25377119Sphk break; 25422417Sdanny case 'a': 25522417Sdanny options |= F_AUDIBLE; 25622417Sdanny break; 2571558Srgrimes case 'c': 25823247Swollman ultmp = strtoul(optarg, &ep, 0); 25923247Swollman if (*ep || ep == optarg || ultmp > LONG_MAX || !ultmp) 26023247Swollman errx(EX_USAGE, 26123247Swollman "invalid count of packets to transmit: `%s'", 26223247Swollman optarg); 26323247Swollman npackets = ultmp; 2641558Srgrimes break; 2651558Srgrimes case 'd': 2661558Srgrimes options |= F_SO_DEBUG; 2671558Srgrimes break; 2681558Srgrimes case 'f': 26938549Sdillon if (uid) { 27023247Swollman errno = EPERM; 27123247Swollman err(EX_NOPERM, "-f flag"); 2721558Srgrimes } 2731558Srgrimes options |= F_FLOOD; 2741558Srgrimes setbuf(stdout, (char *)NULL); 2751558Srgrimes break; 2761558Srgrimes case 'i': /* wait between sending packets */ 27738549Sdillon { 27838549Sdillon double t = strtod(optarg, &ep) * 1000.0; 27938549Sdillon 28038549Sdillon if (*ep || ep == optarg || t > (double)INT_MAX) { 28138549Sdillon errx( 28238549Sdillon EX_USAGE, 28338549Sdillon "invalid timing interval: `%s'", 28438549Sdillon optarg 28538549Sdillon ); 28638549Sdillon } 28738549Sdillon options |= F_INTERVAL; 28838549Sdillon interval = (int)t; 28938549Sdillon if (uid && interval < 1000) { 29038549Sdillon errno = EPERM; 29138549Sdillon err(EX_NOPERM, "-i interval too short"); 29238549Sdillon } 29338549Sdillon } 2941558Srgrimes break; 29520540Sfenner case 'I': /* multicast interface */ 29623247Swollman if (inet_aton(optarg, &ifaddr) == 0) 29723247Swollman errx(EX_USAGE, 29823247Swollman "invalid multicast interface: `%s'", 29923247Swollman optarg); 30020540Sfenner options |= F_MIF; 30120540Sfenner break; 3021558Srgrimes case 'l': 30323247Swollman ultmp = strtoul(optarg, &ep, 0); 30423247Swollman if (*ep || ep == optarg || ultmp > INT_MAX) 30523247Swollman errx(EX_USAGE, 30623247Swollman "invalid preload value: `%s'", optarg); 30746643Smckay if (uid) { 30823251Simp errno = EPERM; 30923251Simp err(EX_NOPERM, "-l flag"); 31023251Simp } 31123247Swollman preload = ultmp; 3121558Srgrimes break; 31320540Sfenner case 'L': 31420540Sfenner options |= F_NOLOOP; 31520540Sfenner loop = 0; 31620540Sfenner break; 31774029Sru case 'm': /* TTL */ 31874029Sru ultmp = strtoul(optarg, &ep, 0); 31974029Sru if (*ep || ep == optarg || ultmp > 255) 32074029Sru errx(EX_USAGE, "invalid TTL: `%s'", 32174029Sru optarg); 32274029Sru ttl = ultmp; 32374029Sru options |= F_TTL; 32474029Sru break; 3251558Srgrimes case 'n': 3261558Srgrimes options |= F_NUMERIC; 3271558Srgrimes break; 3281558Srgrimes case 'p': /* fill buffer with user pattern */ 3291558Srgrimes options |= F_PINGFILLED; 3301558Srgrimes fill((char *)datap, optarg); 3311558Srgrimes break; 33217724Sfenner case 'Q': 33317724Sfenner options |= F_QUIET2; 33417724Sfenner break; 3351558Srgrimes case 'q': 3361558Srgrimes options |= F_QUIET; 3371558Srgrimes break; 3381558Srgrimes case 'R': 3391558Srgrimes options |= F_RROUTE; 3401558Srgrimes break; 3411558Srgrimes case 'r': 3421558Srgrimes options |= F_SO_DONTROUTE; 3431558Srgrimes break; 3441558Srgrimes case 's': /* size of packet to send */ 34538549Sdillon if (uid) { 34638549Sdillon errno = EPERM; 34738549Sdillon err(EX_NOPERM, "-s flag"); 34838549Sdillon } 34923247Swollman ultmp = strtoul(optarg, &ep, 0); 35023247Swollman if (ultmp > MAXPACKET) 35123247Swollman errx(EX_USAGE, "packet size too large: %lu", 35223247Swollman ultmp); 35323247Swollman if (*ep || ep == optarg || !ultmp) 35423247Swollman errx(EX_USAGE, "invalid packet size: `%s'", 35523247Swollman optarg); 35623247Swollman datalen = ultmp; 3571558Srgrimes break; 35842337Simp case 'S': 35942337Simp source = optarg; 36042337Simp break; 36155996Sbillf case 't': 36256342Sbillf alarmtimeout = strtoul(optarg, &ep, 0); 36356342Sbillf if ((alarmtimeout < 1) || (alarmtimeout == ULONG_MAX)) 36455996Sbillf errx(EX_USAGE, "invalid timeout: `%s'", 36555996Sbillf optarg); 36656342Sbillf if (alarmtimeout > MAXALARM) 36756342Sbillf errx(EX_USAGE, "invalid timeout: `%s' > %d", 36856342Sbillf optarg, MAXALARM); 36956342Sbillf alarm((int)alarmtimeout); 37055996Sbillf break; 37120540Sfenner case 'T': /* multicast TTL */ 37223247Swollman ultmp = strtoul(optarg, &ep, 0); 37323247Swollman if (*ep || ep == optarg || ultmp > 255) 37423247Swollman errx(EX_USAGE, "invalid multicast TTL: `%s'", 37523247Swollman optarg); 37674029Sru mttl = ultmp; 37720540Sfenner options |= F_MTTL; 37820540Sfenner break; 3791558Srgrimes case 'v': 3801558Srgrimes options |= F_VERBOSE; 3811558Srgrimes break; 38255505Sshin#ifdef IPSEC 38355505Sshin#ifdef IPSEC_POLICY_IPSEC 38455505Sshin case 'P': 38555505Sshin options |= F_POLICY; 38655505Sshin if (!strncmp("in", optarg, 2)) 38755505Sshin policy_in = strdup(optarg); 38855505Sshin else if (!strncmp("out", optarg, 3)) 38955505Sshin policy_out = strdup(optarg); 39055505Sshin else 39155505Sshin errx(1, "invalid security policy"); 39255505Sshin break; 39355505Sshin#endif /*IPSEC_POLICY_IPSEC*/ 39455505Sshin#endif /*IPSEC*/ 3951558Srgrimes default: 39637671Scharnier usage(); 3971558Srgrimes } 39823247Swollman } 3991558Srgrimes 40023247Swollman if (argc - optind != 1) 40137671Scharnier usage(); 40223247Swollman target = argv[optind]; 4031558Srgrimes 40442337Simp if (source) { 40542337Simp bzero((char *)&sin, sizeof(sin)); 40642337Simp sin.sin_family = AF_INET; 40742337Simp if (inet_aton(source, &sin.sin_addr) != 0) { 40842337Simp shostname = source; 40942337Simp } else { 41042337Simp hp = gethostbyname2(source, AF_INET); 41142337Simp if (!hp) 41242337Simp errx(EX_NOHOST, "cannot resolve %s: %s", 41342337Simp source, hstrerror(h_errno)); 41442337Simp 41542337Simp sin.sin_len = sizeof sin; 41642337Simp if (hp->h_length > sizeof(sin.sin_addr)) 41742337Simp errx(1,"gethostbyname2: illegal address"); 41842337Simp memcpy(&sin.sin_addr, hp->h_addr_list[0], 41942337Simp sizeof (sin.sin_addr)); 42042337Simp (void)strncpy(snamebuf, hp->h_name, 42142337Simp sizeof(snamebuf) - 1); 42242337Simp snamebuf[sizeof(snamebuf) - 1] = '\0'; 42342337Simp shostname = snamebuf; 42442337Simp } 42542337Simp if (bind(s, (struct sockaddr *)&sin, sizeof sin) == -1) 42642337Simp err(1, "bind"); 42742337Simp } 42842337Simp 42979403Smjacob bzero(&whereto, sizeof(whereto)); 43079403Smjacob to = &whereto; 4311558Srgrimes to->sin_family = AF_INET; 43279403Smjacob to->sin_len = sizeof *to; 43323247Swollman if (inet_aton(target, &to->sin_addr) != 0) { 4341558Srgrimes hostname = target; 43523247Swollman } else { 43623247Swollman hp = gethostbyname2(target, AF_INET); 43723247Swollman if (!hp) 43823247Swollman errx(EX_NOHOST, "cannot resolve %s: %s", 43923247Swollman target, hstrerror(h_errno)); 44023247Swollman 44123327Simp if (hp->h_length > sizeof(to->sin_addr)) 44223327Simp errx(1,"gethostbyname2 returned an illegal address"); 44323247Swollman memcpy(&to->sin_addr, hp->h_addr_list[0], sizeof to->sin_addr); 4441558Srgrimes (void)strncpy(hnamebuf, hp->h_name, sizeof(hnamebuf) - 1); 44531956Simp hnamebuf[sizeof(hnamebuf) - 1] = '\0'; 4461558Srgrimes hostname = hnamebuf; 4471558Srgrimes } 4481558Srgrimes 44923247Swollman if (options & F_FLOOD && options & F_INTERVAL) 45023247Swollman errx(EX_USAGE, "-f and -i: incompatible options"); 4511558Srgrimes 45223247Swollman if (options & F_FLOOD && IN_MULTICAST(ntohl(to->sin_addr.s_addr))) 45323247Swollman errx(EX_USAGE, 45423247Swollman "-f flag cannot be used with multicast destination"); 45523247Swollman if (options & (F_MIF | F_NOLOOP | F_MTTL) 45623247Swollman && !IN_MULTICAST(ntohl(to->sin_addr.s_addr))) 45723247Swollman errx(EX_USAGE, 45823247Swollman "-I, -L, -T flags cannot be used with unicast destination"); 45923247Swollman 46036089Sjb if (datalen >= PHDR_LEN) /* can we time transfer */ 4611558Srgrimes timing = 1; 4621558Srgrimes packlen = datalen + MAXIPLEN + MAXICMPLEN; 46323247Swollman if (!(packet = (u_char *)malloc((size_t)packlen))) 46423247Swollman err(EX_UNAVAILABLE, "malloc"); 46523247Swollman 4661558Srgrimes if (!(options & F_PINGFILLED)) 46736089Sjb for (i = PHDR_LEN; i < datalen; ++i) 4681558Srgrimes *datap++ = i; 4691558Srgrimes 4701558Srgrimes ident = getpid() & 0xFFFF; 4711558Srgrimes 47217474Sfenner if (s < 0) { 47317474Sfenner errno = sockerrno; 47423247Swollman err(EX_OSERR, "socket"); 4751558Srgrimes } 4761558Srgrimes hold = 1; 4771558Srgrimes if (options & F_SO_DEBUG) 4781558Srgrimes (void)setsockopt(s, SOL_SOCKET, SO_DEBUG, (char *)&hold, 4791558Srgrimes sizeof(hold)); 4801558Srgrimes if (options & F_SO_DONTROUTE) 4811558Srgrimes (void)setsockopt(s, SOL_SOCKET, SO_DONTROUTE, (char *)&hold, 4821558Srgrimes sizeof(hold)); 48355505Sshin#ifdef IPSEC 48455505Sshin#ifdef IPSEC_POLICY_IPSEC 48555505Sshin if (options & F_POLICY) { 48655505Sshin char *buf; 48755505Sshin if (policy_in != NULL) { 48855505Sshin buf = ipsec_set_policy(policy_in, strlen(policy_in)); 48955505Sshin if (buf == NULL) 49068905Skris errx(EX_CONFIG, "%s", ipsec_strerror()); 49155505Sshin if (setsockopt(s, IPPROTO_IP, IP_IPSEC_POLICY, 49255505Sshin buf, ipsec_get_policylen(buf)) < 0) 49355505Sshin err(EX_CONFIG, "ipsec policy cannot be configured"); 49455505Sshin free(buf); 49555505Sshin } 4961558Srgrimes 49755505Sshin if (policy_out != NULL) { 49855505Sshin buf = ipsec_set_policy(policy_out, strlen(policy_out)); 49955505Sshin if (buf == NULL) 50068905Skris errx(EX_CONFIG, "%s", ipsec_strerror()); 50155505Sshin if (setsockopt(s, IPPROTO_IP, IP_IPSEC_POLICY, 50255505Sshin buf, ipsec_get_policylen(buf)) < 0) 50355505Sshin err(EX_CONFIG, "ipsec policy cannot be configured"); 50455505Sshin free(buf); 50555505Sshin } 50655505Sshin } 50755505Sshin#endif /*IPSEC_POLICY_IPSEC*/ 50855505Sshin#endif /*IPSEC*/ 50955505Sshin 5101558Srgrimes /* record route option */ 5111558Srgrimes if (options & F_RROUTE) { 5121558Srgrimes#ifdef IP_OPTIONS 51336378Sfenner bzero(rspace, sizeof(rspace)); 5141558Srgrimes rspace[IPOPT_OPTVAL] = IPOPT_RR; 51536378Sfenner rspace[IPOPT_OLEN] = sizeof(rspace) - 1; 5161558Srgrimes rspace[IPOPT_OFFSET] = IPOPT_MINOFF; 51736378Sfenner rspace[sizeof(rspace) - 1] = IPOPT_EOL; 5181558Srgrimes if (setsockopt(s, IPPROTO_IP, IP_OPTIONS, rspace, 51923247Swollman sizeof(rspace)) < 0) 52023247Swollman err(EX_OSERR, "setsockopt IP_OPTIONS"); 5211558Srgrimes#else 52223247Swollman errx(EX_UNAVAILABLE, 52323247Swollman "record route not available in this implementation"); 5241558Srgrimes#endif /* IP_OPTIONS */ 5251558Srgrimes } 5261558Srgrimes 52774029Sru if (options & F_TTL) { 52874029Sru if (setsockopt(s, IPPROTO_IP, IP_TTL, &ttl, 52974029Sru sizeof(ttl)) < 0) { 53074029Sru err(EX_OSERR, "setsockopt IP_TTL"); 53174029Sru } 53274029Sru } 53320540Sfenner if (options & F_NOLOOP) { 53420540Sfenner if (setsockopt(s, IPPROTO_IP, IP_MULTICAST_LOOP, &loop, 53520540Sfenner sizeof(loop)) < 0) { 53623247Swollman err(EX_OSERR, "setsockopt IP_MULTICAST_LOOP"); 53720540Sfenner } 53820540Sfenner } 53920540Sfenner if (options & F_MTTL) { 54074029Sru if (setsockopt(s, IPPROTO_IP, IP_MULTICAST_TTL, &mttl, 54174029Sru sizeof(mttl)) < 0) { 54223247Swollman err(EX_OSERR, "setsockopt IP_MULTICAST_TTL"); 54320540Sfenner } 54420540Sfenner } 54520540Sfenner if (options & F_MIF) { 54620540Sfenner if (setsockopt(s, IPPROTO_IP, IP_MULTICAST_IF, &ifaddr, 54720540Sfenner sizeof(ifaddr)) < 0) { 54823247Swollman err(EX_OSERR, "setsockopt IP_MULTICAST_IF"); 54920540Sfenner } 55020540Sfenner } 55136378Sfenner#ifdef SO_TIMESTAMP 55236378Sfenner { int on = 1; 55336378Sfenner if (setsockopt(s, SOL_SOCKET, SO_TIMESTAMP, &on, sizeof(on)) < 0) 55436378Sfenner err(EX_OSERR, "setsockopt SO_TIMESTAMP"); 55536378Sfenner } 55636378Sfenner#endif 55720540Sfenner 5581558Srgrimes /* 5591558Srgrimes * When pinging the broadcast address, you can get a lot of answers. 5601558Srgrimes * Doing something so evil is useful if you are trying to stress the 5611558Srgrimes * ethernet, or just want to fill the arp cache to get some stuff for 56223247Swollman * /etc/ethers. But beware: RFC 1122 allows hosts to ignore broadcast 56323247Swollman * or multicast pings if they wish. 5641558Srgrimes */ 5651558Srgrimes hold = 48 * 1024; 5661558Srgrimes (void)setsockopt(s, SOL_SOCKET, SO_RCVBUF, (char *)&hold, 5671558Srgrimes sizeof(hold)); 5681558Srgrimes 56979018Srwatson if (!uid) { 57079018Srwatson (void)setsockopt(s, SOL_SOCKET, SO_SNDBUF, (char *)&hold, 57179018Srwatson sizeof(hold)); 57279018Srwatson } 57379018Srwatson 57442337Simp if (to->sin_family == AF_INET) { 57542337Simp (void)printf("PING %s (%s)", hostname, 57642337Simp inet_ntoa(to->sin_addr)); 57742337Simp if (source) 57842337Simp (void)printf(" from %s", shostname); 57942337Simp (void)printf(": %d data bytes\n", datalen); 58042337Simp } else 5811558Srgrimes (void)printf("PING %s: %d data bytes\n", hostname, datalen); 5821558Srgrimes 58320280Sbde /* 58427354Ssef * Use sigaction() instead of signal() to get unambiguous semantics, 58527354Ssef * in particular with SA_RESTART not set. 58620280Sbde */ 58727354Ssef 58820205Spst sigemptyset(&si_sa.sa_mask); 58920195Ssef si_sa.sa_flags = 0; 59027354Ssef 59127354Ssef si_sa.sa_handler = stopit; 59227354Ssef if (sigaction(SIGINT, &si_sa, 0) == -1) { 59327354Ssef err(EX_OSERR, "sigaction SIGINT"); 59427354Ssef } 59527354Ssef 59627354Ssef si_sa.sa_handler = status; 59720195Ssef if (sigaction(SIGINFO, &si_sa, 0) == -1) { 59823385Simp err(EX_OSERR, "sigaction"); 59920195Ssef } 60020195Ssef 60156342Sbillf if (alarmtimeout > 0) { 60256342Sbillf si_sa.sa_handler = stopit; 60356342Sbillf if (sigaction(SIGALRM, &si_sa, 0) == -1) 60456342Sbillf err(EX_OSERR, "sigaction SIGALRM"); 60556342Sbillf } 60656342Sbillf 60736378Sfenner bzero(&msg, sizeof(msg)); 60836378Sfenner msg.msg_name = (caddr_t)&from; 60936378Sfenner msg.msg_iov = &iov; 61036378Sfenner msg.msg_iovlen = 1; 61136378Sfenner#ifdef SO_TIMESTAMP 61236378Sfenner msg.msg_control = (caddr_t)ctrl; 61336378Sfenner#endif 61436378Sfenner iov.iov_base = packet; 61536378Sfenner iov.iov_len = packlen; 61636378Sfenner 61719864Ssef if (tcgetattr(STDOUT_FILENO, &ts) != -1) { 61819864Ssef reset_kerninfo = !(ts.c_lflag & NOKERNINFO); 61919864Ssef ts.c_lflag |= NOKERNINFO; 62019864Ssef tcsetattr(STDOUT_FILENO, TCSANOW, &ts); 62119864Ssef } 62219864Ssef 62389349Sru if (preload == 0) 62489349Sru pinger(); /* send the first ping */ 62589349Sru else { 62689349Sru if (npackets != 0 && preload > npackets) 62789349Sru preload = npackets; 62889349Sru while (preload--) /* fire off them quickies */ 62989349Sru pinger(); 63089349Sru } 63189349Sru (void)gettimeofday(&last, NULL); 6321558Srgrimes 63336378Sfenner if (options & F_FLOOD) { 63436378Sfenner intvl.tv_sec = 0; 63536378Sfenner intvl.tv_usec = 10000; 63636378Sfenner } else { 63738549Sdillon intvl.tv_sec = interval / 1000; 63838549Sdillon intvl.tv_usec = interval % 1000 * 1000; 63936378Sfenner } 6401558Srgrimes 64127533Sbde while (!finish_up) { 64292806Sobrien int cc; 64336378Sfenner int n; 64436378Sfenner struct timeval timeout, now; 64536378Sfenner fd_set rfds; 6461558Srgrimes 64720280Sbde check_status(); 64836378Sfenner FD_ZERO(&rfds); 64936378Sfenner FD_SET(s, &rfds); 65036378Sfenner (void)gettimeofday(&now, NULL); 65136378Sfenner timeout.tv_sec = last.tv_sec + intvl.tv_sec - now.tv_sec; 65236378Sfenner timeout.tv_usec = last.tv_usec + intvl.tv_usec - now.tv_usec; 65336378Sfenner while (timeout.tv_usec < 0) { 65436378Sfenner timeout.tv_usec += 1000000; 65536378Sfenner timeout.tv_sec--; 6561558Srgrimes } 65737671Scharnier while (timeout.tv_usec >= 1000000) { 65836378Sfenner timeout.tv_usec -= 1000000; 65936378Sfenner timeout.tv_sec++; 66036378Sfenner } 66136378Sfenner if (timeout.tv_sec < 0) 66236378Sfenner timeout.tv_sec = timeout.tv_usec = 0; 66336378Sfenner n = select(s + 1, &rfds, NULL, NULL, &timeout); 66446643Smckay if (n < 0) 66546643Smckay continue; /* Must be EINTR. */ 66636378Sfenner if (n == 1) { 66736378Sfenner struct timeval *t = 0; 66836378Sfenner#ifdef SO_TIMESTAMP 66936378Sfenner struct cmsghdr *cmsg = (struct cmsghdr *)&ctrl; 67036378Sfenner 67136378Sfenner msg.msg_controllen = sizeof(ctrl); 67236378Sfenner#endif 67336378Sfenner msg.msg_namelen = sizeof(from); 67436378Sfenner if ((cc = recvmsg(s, &msg, 0)) < 0) { 67536378Sfenner if (errno == EINTR) 67636378Sfenner continue; 67737671Scharnier warn("recvmsg"); 6781558Srgrimes continue; 67936378Sfenner } 68036378Sfenner#ifdef SO_TIMESTAMP 68136378Sfenner if (cmsg->cmsg_level == SOL_SOCKET && 68236378Sfenner cmsg->cmsg_type == SCM_TIMESTAMP && 68358068Sshin cmsg->cmsg_len == CMSG_LEN(sizeof *t)) { 68436713Sjb /* Copy to avoid alignment problems: */ 68536713Sjb memcpy(&now,CMSG_DATA(cmsg),sizeof(now)); 68636713Sjb t = &now; 68736713Sjb } 68836378Sfenner#endif 68936378Sfenner if (t == 0) { 69036378Sfenner (void)gettimeofday(&now, NULL); 69136378Sfenner t = &now; 69236378Sfenner } 69336378Sfenner pr_pack((char *)packet, cc, &from, t); 69436378Sfenner if (npackets && nreceived >= npackets) 69536378Sfenner break; 6961558Srgrimes } 69746643Smckay if (n == 0 || options & F_FLOOD) { 69836378Sfenner if (!npackets || ntransmitted < npackets) 69936378Sfenner pinger(); 70036378Sfenner else { 70136378Sfenner if (almost_done) 70236378Sfenner break; 70336378Sfenner almost_done = 1; 70446643Smckay intvl.tv_usec = 0; 70536378Sfenner if (nreceived) { 70636378Sfenner intvl.tv_sec = 2 * tmax / 1000; 70736378Sfenner if (!intvl.tv_sec) 70836378Sfenner intvl.tv_sec = 1; 70936378Sfenner } else 71036378Sfenner intvl.tv_sec = MAXWAIT; 71136378Sfenner } 71236378Sfenner (void)gettimeofday(&last, NULL); 71377119Sphk 71483940Siedowse if (ntransmitted - nreceived - 1 > nmissedmax) { 71583940Siedowse nmissedmax = ntransmitted - nreceived - 1; 71683940Siedowse if (options & F_MISSED) 71783940Siedowse (void)write(STDOUT_FILENO, &BBELL, 1); 71883940Siedowse } 71936378Sfenner } 7201558Srgrimes } 72127533Sbde finish(); 7221558Srgrimes /* NOTREACHED */ 72323251Simp exit(0); /* Make the compiler happy */ 7241558Srgrimes} 7251558Srgrimes 7261558Srgrimes/* 72727533Sbde * stopit -- 72827533Sbde * Set the global bit that causes the main loop to quit. 72927533Sbde * Do NOT call finish() from here, since finish() does far too much 73027533Sbde * to be called from a signal handler. 73127299Sjulian */ 73227299Sjulianvoid 73327533Sbdestopit(sig) 73427533Sbde int sig; 73527299Sjulian{ 73627299Sjulian finish_up = 1; 73727299Sjulian} 73827299Sjulian 73927299Sjulian/* 7401558Srgrimes * pinger -- 7411558Srgrimes * Compose and transmit an ICMP ECHO REQUEST packet. The IP packet 7421558Srgrimes * will be added on by the kernel. The ID field is our UNIX process ID, 7431558Srgrimes * and the sequence number is an ascending integer. The first 8 bytes 74417724Sfenner * of the data portion are used to hold a UNIX "timeval" struct in host 7451558Srgrimes * byte-order, to compute the round-trip time. 7461558Srgrimes */ 74723247Swollmanstatic void 74823247Swollmanpinger(void) 7491558Srgrimes{ 75092806Sobrien struct icmp *icp; 75192806Sobrien int cc; 7521558Srgrimes int i; 7531558Srgrimes 7541558Srgrimes icp = (struct icmp *)outpack; 7551558Srgrimes icp->icmp_type = ICMP_ECHO; 7561558Srgrimes icp->icmp_code = 0; 7571558Srgrimes icp->icmp_cksum = 0; 75891432Sfenner icp->icmp_seq = htons(ntransmitted); 7591558Srgrimes icp->icmp_id = ident; /* ID */ 7601558Srgrimes 76191432Sfenner CLR(ntransmitted % mx_dup_ck); 7621558Srgrimes 7631558Srgrimes if (timing) 7641558Srgrimes (void)gettimeofday((struct timeval *)&outpack[8], 7651558Srgrimes (struct timezone *)NULL); 7661558Srgrimes 76736089Sjb cc = datalen + PHDR_LEN; /* skips ICMP portion */ 7681558Srgrimes 7691558Srgrimes /* compute ICMP checksum here */ 7701558Srgrimes icp->icmp_cksum = in_cksum((u_short *)icp, cc); 7711558Srgrimes 77279403Smjacob i = sendto(s, (char *)outpack, cc, 0, (struct sockaddr *)&whereto, 77379403Smjacob sizeof(whereto)); 7741558Srgrimes 7751558Srgrimes if (i < 0 || i != cc) { 77623247Swollman if (i < 0) { 77727533Sbde if (options & F_FLOOD && errno == ENOBUFS) { 77827299Sjulian usleep(FLOOD_BACKOFF); 77927299Sjulian return; 78027299Sjulian } 78123247Swollman warn("sendto"); 78223247Swollman } else { 78323247Swollman warn("%s: partial write: %d of %d bytes", 78435216Sphk hostname, i, cc); 78523247Swollman } 78627945Sjulian } 78727945Sjulian ntransmitted++; 7881558Srgrimes if (!(options & F_QUIET) && options & F_FLOOD) 7891558Srgrimes (void)write(STDOUT_FILENO, &DOT, 1); 7901558Srgrimes} 7911558Srgrimes 7921558Srgrimes/* 7931558Srgrimes * pr_pack -- 7941558Srgrimes * Print out the packet, if it came from us. This logic is necessary 7951558Srgrimes * because ALL readers of the ICMP socket get a copy of ALL ICMP packets 7961558Srgrimes * which arrive ('tis only fair). This permits multiple copies of this 7971558Srgrimes * program to be run without having intermingled output (or statistics!). 7981558Srgrimes */ 79923247Swollmanstatic void 80036378Sfennerpr_pack(buf, cc, from, tv) 8011558Srgrimes char *buf; 8021558Srgrimes int cc; 8031558Srgrimes struct sockaddr_in *from; 80436378Sfenner struct timeval *tv; 8051558Srgrimes{ 80692806Sobrien struct icmp *icp; 80792806Sobrien u_long l; 80892806Sobrien int i, j; 80992806Sobrien u_char *cp,*dp; 8101558Srgrimes static int old_rrlen; 8111558Srgrimes static char old_rr[MAX_IPOPTLEN]; 8121558Srgrimes struct ip *ip; 81336378Sfenner struct timeval *tp; 81427533Sbde double triptime; 81591432Sfenner int hlen, dupflag, seq; 8161558Srgrimes 8171558Srgrimes /* Check the IP header */ 8181558Srgrimes ip = (struct ip *)buf; 8191558Srgrimes hlen = ip->ip_hl << 2; 8201558Srgrimes if (cc < hlen + ICMP_MINLEN) { 8211558Srgrimes if (options & F_VERBOSE) 82223247Swollman warn("packet too short (%d bytes) from %s", cc, 82323247Swollman inet_ntoa(from->sin_addr)); 8241558Srgrimes return; 8251558Srgrimes } 8261558Srgrimes 8271558Srgrimes /* Now the ICMP part */ 8281558Srgrimes cc -= hlen; 8291558Srgrimes icp = (struct icmp *)(buf + hlen); 8301558Srgrimes if (icp->icmp_type == ICMP_ECHOREPLY) { 8311558Srgrimes if (icp->icmp_id != ident) 8321558Srgrimes return; /* 'Twas not our ECHO */ 8331558Srgrimes ++nreceived; 83427533Sbde triptime = 0.0; 8351558Srgrimes if (timing) { 83636089Sjb struct timeval tv1; 8371558Srgrimes#ifndef icmp_data 8381558Srgrimes tp = (struct timeval *)&icp->icmp_ip; 8391558Srgrimes#else 8401558Srgrimes tp = (struct timeval *)icp->icmp_data; 8411558Srgrimes#endif 84236089Sjb /* Avoid unaligned data: */ 84336089Sjb memcpy(&tv1,tp,sizeof(tv1)); 84436378Sfenner tvsub(tv, &tv1); 84536378Sfenner triptime = ((double)tv->tv_sec) * 1000.0 + 84636378Sfenner ((double)tv->tv_usec) / 1000.0; 8471558Srgrimes tsum += triptime; 84827508Swollman tsumsq += triptime * triptime; 8491558Srgrimes if (triptime < tmin) 8501558Srgrimes tmin = triptime; 8511558Srgrimes if (triptime > tmax) 8521558Srgrimes tmax = triptime; 8531558Srgrimes } 8541558Srgrimes 85591432Sfenner seq = ntohs(icp->icmp_seq); 85691432Sfenner 85791432Sfenner if (TST(seq % mx_dup_ck)) { 8581558Srgrimes ++nrepeats; 8591558Srgrimes --nreceived; 8601558Srgrimes dupflag = 1; 8611558Srgrimes } else { 86291432Sfenner SET(seq % mx_dup_ck); 8631558Srgrimes dupflag = 0; 8641558Srgrimes } 8651558Srgrimes 8661558Srgrimes if (options & F_QUIET) 8671558Srgrimes return; 8681558Srgrimes 8691558Srgrimes if (options & F_FLOOD) 8701558Srgrimes (void)write(STDOUT_FILENO, &BSPACE, 1); 8711558Srgrimes else { 8721558Srgrimes (void)printf("%d bytes from %s: icmp_seq=%u", cc, 8731558Srgrimes inet_ntoa(*(struct in_addr *)&from->sin_addr.s_addr), 87491432Sfenner seq); 8751558Srgrimes (void)printf(" ttl=%d", ip->ip_ttl); 8761558Srgrimes if (timing) 8771859Sdg (void)printf(" time=%.3f ms", triptime); 8781558Srgrimes if (dupflag) 8791558Srgrimes (void)printf(" (DUP!)"); 88022417Sdanny if (options & F_AUDIBLE) 88177119Sphk (void)write(STDOUT_FILENO, &BBELL, 1); 8821558Srgrimes /* check the data */ 88336089Sjb cp = (u_char*)&icp->icmp_data[PHDR_LEN]; 88436089Sjb dp = &outpack[8 + PHDR_LEN]; 88536089Sjb for (i = PHDR_LEN; i < datalen; ++i, ++cp, ++dp) { 8861558Srgrimes if (*cp != *dp) { 8871558Srgrimes (void)printf("\nwrong data byte #%d should be 0x%x but was 0x%x", 8881558Srgrimes i, *dp, *cp); 88936089Sjb printf("\ncp:"); 8901558Srgrimes cp = (u_char*)&icp->icmp_data[0]; 89136089Sjb for (i = 0; i < datalen; ++i, ++cp) { 8921558Srgrimes if ((i % 32) == 8) 8931558Srgrimes (void)printf("\n\t"); 8941558Srgrimes (void)printf("%x ", *cp); 8951558Srgrimes } 89636089Sjb printf("\ndp:"); 89736089Sjb cp = &outpack[8]; 89836089Sjb for (i = 0; i < datalen; ++i, ++cp) { 89936089Sjb if ((i % 32) == 8) 90036089Sjb (void)printf("\n\t"); 90136089Sjb (void)printf("%x ", *cp); 90236089Sjb } 9031558Srgrimes break; 9041558Srgrimes } 9051558Srgrimes } 9061558Srgrimes } 9071558Srgrimes } else { 90817724Sfenner /* 90917724Sfenner * We've got something other than an ECHOREPLY. 91017724Sfenner * See if it's a reply to something that we sent. 91117724Sfenner * We can compare IP destination, protocol, 91217724Sfenner * and ICMP type and ID. 91323251Simp * 91423251Simp * Only print all the error messages if we are running 91523251Simp * as root to avoid leaking information not normally 91623251Simp * available to those not running as root. 91717724Sfenner */ 91817724Sfenner#ifndef icmp_data 91917724Sfenner struct ip *oip = &icp->icmp_ip; 92017724Sfenner#else 92117724Sfenner struct ip *oip = (struct ip *)icp->icmp_data; 92217724Sfenner#endif 92317724Sfenner struct icmp *oicmp = (struct icmp *)(oip + 1); 92417724Sfenner 92523295Simp if (((options & F_VERBOSE) && uid == 0) || 92617724Sfenner (!(options & F_QUIET2) && 92779403Smjacob (oip->ip_dst.s_addr == whereto.sin_addr.s_addr) && 92817724Sfenner (oip->ip_p == IPPROTO_ICMP) && 92917724Sfenner (oicmp->icmp_type == ICMP_ECHO) && 93017724Sfenner (oicmp->icmp_id == ident))) { 93117724Sfenner (void)printf("%d bytes from %s: ", cc, 93223247Swollman pr_addr(from->sin_addr)); 93317724Sfenner pr_icmph(icp); 93417724Sfenner } else 93517724Sfenner return; 9361558Srgrimes } 9371558Srgrimes 9381558Srgrimes /* Display any IP options */ 9391558Srgrimes cp = (u_char *)buf + sizeof(struct ip); 9401558Srgrimes 9411558Srgrimes for (; hlen > (int)sizeof(struct ip); --hlen, ++cp) 9421558Srgrimes switch (*cp) { 9431558Srgrimes case IPOPT_EOL: 9441558Srgrimes hlen = 0; 9451558Srgrimes break; 9461558Srgrimes case IPOPT_LSRR: 9471558Srgrimes (void)printf("\nLSRR: "); 9481558Srgrimes hlen -= 2; 9491558Srgrimes j = *++cp; 9501558Srgrimes ++cp; 9511558Srgrimes if (j > IPOPT_MINOFF) 9521558Srgrimes for (;;) { 9531558Srgrimes l = *++cp; 9541558Srgrimes l = (l<<8) + *++cp; 9551558Srgrimes l = (l<<8) + *++cp; 9561558Srgrimes l = (l<<8) + *++cp; 95723247Swollman if (l == 0) { 95823247Swollman printf("\t0.0.0.0"); 95923247Swollman } else { 96023247Swollman struct in_addr ina; 96123247Swollman ina.s_addr = ntohl(l); 96223247Swollman printf("\t%s", pr_addr(ina)); 96323247Swollman } 9641558Srgrimes hlen -= 4; 9651558Srgrimes j -= 4; 9661558Srgrimes if (j <= IPOPT_MINOFF) 9671558Srgrimes break; 9681558Srgrimes (void)putchar('\n'); 9691558Srgrimes } 9701558Srgrimes break; 9711558Srgrimes case IPOPT_RR: 9721558Srgrimes j = *++cp; /* get length */ 9731558Srgrimes i = *++cp; /* and pointer */ 9741558Srgrimes hlen -= 2; 9751558Srgrimes if (i > j) 9761558Srgrimes i = j; 9771558Srgrimes i -= IPOPT_MINOFF; 9781558Srgrimes if (i <= 0) 9791558Srgrimes continue; 9801558Srgrimes if (i == old_rrlen 9811558Srgrimes && cp == (u_char *)buf + sizeof(struct ip) + 2 9821558Srgrimes && !bcmp((char *)cp, old_rr, i) 9831558Srgrimes && !(options & F_FLOOD)) { 9841558Srgrimes (void)printf("\t(same route)"); 9851558Srgrimes i = ((i + 3) / 4) * 4; 9861558Srgrimes hlen -= i; 9871558Srgrimes cp += i; 9881558Srgrimes break; 9891558Srgrimes } 99034995Seivind if (i < MAX_IPOPTLEN) { 99134976Simp old_rrlen = i; 99234976Simp bcopy((char *)cp, old_rr, i); 99334976Simp } else 99434976Simp old_rrlen = 0; 99534976Simp 9961558Srgrimes (void)printf("\nRR: "); 99734976Simp j = 0; 9981558Srgrimes for (;;) { 9991558Srgrimes l = *++cp; 10001558Srgrimes l = (l<<8) + *++cp; 10011558Srgrimes l = (l<<8) + *++cp; 10021558Srgrimes l = (l<<8) + *++cp; 100323247Swollman if (l == 0) { 100423247Swollman printf("\t0.0.0.0"); 100523247Swollman } else { 100623247Swollman struct in_addr ina; 100723247Swollman ina.s_addr = ntohl(l); 100823247Swollman printf("\t%s", pr_addr(ina)); 100923247Swollman } 10101558Srgrimes hlen -= 4; 10111558Srgrimes i -= 4; 101234976Simp j += 4; 10131558Srgrimes if (i <= 0) 10141558Srgrimes break; 101534976Simp if (j >= MAX_IPOPTLEN) { 101634976Simp (void) printf("\t(truncated route)"); 101734976Simp break; 101834976Simp } 10191558Srgrimes (void)putchar('\n'); 10201558Srgrimes } 10211558Srgrimes break; 10221558Srgrimes case IPOPT_NOP: 10231558Srgrimes (void)printf("\nNOP"); 10241558Srgrimes break; 10251558Srgrimes default: 10261558Srgrimes (void)printf("\nunknown option %x", *cp); 10271558Srgrimes break; 10281558Srgrimes } 10291558Srgrimes if (!(options & F_FLOOD)) { 10301558Srgrimes (void)putchar('\n'); 10311558Srgrimes (void)fflush(stdout); 10321558Srgrimes } 10331558Srgrimes} 10341558Srgrimes 10351558Srgrimes/* 10361558Srgrimes * in_cksum -- 10371558Srgrimes * Checksum routine for Internet Protocol family headers (C Version) 10381558Srgrimes */ 103923247Swollmanu_short 10401558Srgrimesin_cksum(addr, len) 10411558Srgrimes u_short *addr; 10421558Srgrimes int len; 10431558Srgrimes{ 104492806Sobrien int nleft = len; 104592806Sobrien u_short *w = addr; 104692806Sobrien int sum = 0; 104753191Spb union { 104853369Spb u_short us; 104953369Spb u_char uc[2]; 105053369Spb } last; 105153369Spb u_short answer; 10521558Srgrimes 10531558Srgrimes /* 10541558Srgrimes * Our algorithm is simple, using a 32 bit accumulator (sum), we add 10551558Srgrimes * sequential 16 bit words to it, and at the end, fold back all the 10561558Srgrimes * carry bits from the top 16 bits into the lower 16 bits. 10571558Srgrimes */ 10581558Srgrimes while (nleft > 1) { 10591558Srgrimes sum += *w++; 10601558Srgrimes nleft -= 2; 10611558Srgrimes } 10621558Srgrimes 10631558Srgrimes /* mop up an odd byte, if necessary */ 10641558Srgrimes if (nleft == 1) { 106553369Spb last.uc[0] = *(u_char *)w; 106653369Spb last.uc[1] = 0; 106753369Spb sum += last.us; 10681558Srgrimes } 10691558Srgrimes 10701558Srgrimes /* add back carry outs from top 16 bits to low 16 bits */ 10711558Srgrimes sum = (sum >> 16) + (sum & 0xffff); /* add hi 16 to low 16 */ 10721558Srgrimes sum += (sum >> 16); /* add carry */ 107353369Spb answer = ~sum; /* truncate to 16 bits */ 107453369Spb return(answer); 10751558Srgrimes} 10761558Srgrimes 10771558Srgrimes/* 10781558Srgrimes * tvsub -- 10791558Srgrimes * Subtract 2 timeval structs: out = out - in. Out is assumed to 10801558Srgrimes * be >= in. 10811558Srgrimes */ 108223247Swollmanstatic void 10831558Srgrimestvsub(out, in) 108492806Sobrien struct timeval *out, *in; 10851558Srgrimes{ 10861558Srgrimes if ((out->tv_usec -= in->tv_usec) < 0) { 10871558Srgrimes --out->tv_sec; 10881558Srgrimes out->tv_usec += 1000000; 10891558Srgrimes } 10901558Srgrimes out->tv_sec -= in->tv_sec; 10911558Srgrimes} 10921558Srgrimes 10931558Srgrimes/* 10943792Ssef * status -- 10953792Ssef * Print out statistics when SIGINFO is received. 10963792Ssef */ 10973792Ssef 109823247Swollmanstatic void 109920280Sbdestatus(sig) 110020280Sbde int sig; 110120280Sbde{ 110220195Ssef siginfo_p = 1; 110320195Ssef} 110420195Ssef 110523247Swollmanstatic void 110620195Ssefcheck_status() 11073792Ssef{ 110820195Ssef if (siginfo_p) { 110920195Ssef siginfo_p = 0; 111020280Sbde (void)fprintf(stderr, 111120280Sbde "\r%ld/%ld packets received (%.0f%%) %.3f min / %.3f avg / %.3f max\n", 111220280Sbde nreceived, ntransmitted, 111320280Sbde ntransmitted ? nreceived * 100.0 / ntransmitted : 0.0, 111420280Sbde nreceived ? tmin : 0.0, 111520280Sbde nreceived + nrepeats ? tsum / (nreceived + nrepeats) : tsum, 111620280Sbde tmax); 111720195Ssef } 11183792Ssef} 11193792Ssef 11203792Ssef/* 11211558Srgrimes * finish -- 11221558Srgrimes * Print out statistics, and give up. 11231558Srgrimes */ 112423247Swollmanstatic void 112527533Sbdefinish() 11261558Srgrimes{ 11273792Ssef struct termios ts; 11281558Srgrimes 11291558Srgrimes (void)signal(SIGINT, SIG_IGN); 113027354Ssef (void)signal(SIGALRM, SIG_IGN); 11311558Srgrimes (void)putchar('\n'); 11321558Srgrimes (void)fflush(stdout); 11331558Srgrimes (void)printf("--- %s ping statistics ---\n", hostname); 11341558Srgrimes (void)printf("%ld packets transmitted, ", ntransmitted); 11351558Srgrimes (void)printf("%ld packets received, ", nreceived); 11361558Srgrimes if (nrepeats) 11371558Srgrimes (void)printf("+%ld duplicates, ", nrepeats); 113846080Simp if (ntransmitted) { 11391558Srgrimes if (nreceived > ntransmitted) 11401558Srgrimes (void)printf("-- somebody's printing up packets!"); 11411558Srgrimes else 11421558Srgrimes (void)printf("%d%% packet loss", 11431558Srgrimes (int) (((ntransmitted - nreceived) * 100) / 11441558Srgrimes ntransmitted)); 114546080Simp } 11461558Srgrimes (void)putchar('\n'); 114727508Swollman if (nreceived && timing) { 114827508Swollman double n = nreceived + nrepeats; 114927508Swollman double avg = tsum / n; 115027508Swollman double vari = tsumsq / n - avg * avg; 115127508Swollman printf("round-trip min/avg/max/stddev = " 115227508Swollman "%.3f/%.3f/%.3f/%.3f ms\n", 115327508Swollman tmin, avg, tmax, sqrt(vari)); 115427508Swollman } 115519395Sbde if (reset_kerninfo && tcgetattr(STDOUT_FILENO, &ts) != -1) { 11563792Ssef ts.c_lflag &= ~NOKERNINFO; 115719395Sbde tcsetattr(STDOUT_FILENO, TCSANOW, &ts); 11583792Ssef } 11593792Ssef 11608871Srgrimes if (nreceived) 11614862Sdg exit(0); 11624862Sdg else 11634862Sdg exit(2); 11641558Srgrimes} 11651558Srgrimes 11661558Srgrimes#ifdef notdef 11671558Srgrimesstatic char *ttab[] = { 11681558Srgrimes "Echo Reply", /* ip + seq + udata */ 11691558Srgrimes "Dest Unreachable", /* net, host, proto, port, frag, sr + IP */ 11701558Srgrimes "Source Quench", /* IP */ 11711558Srgrimes "Redirect", /* redirect type, gateway, + IP */ 11721558Srgrimes "Echo", 11731558Srgrimes "Time Exceeded", /* transit, frag reassem + IP */ 11741558Srgrimes "Parameter Problem", /* pointer + IP */ 11751558Srgrimes "Timestamp", /* id + seq + three timestamps */ 11761558Srgrimes "Timestamp Reply", /* " */ 11771558Srgrimes "Info Request", /* id + sq */ 11781558Srgrimes "Info Reply" /* " */ 11791558Srgrimes}; 11801558Srgrimes#endif 11811558Srgrimes 11821558Srgrimes/* 11831558Srgrimes * pr_icmph -- 11841558Srgrimes * Print a descriptive string about an ICMP header. 11851558Srgrimes */ 118623247Swollmanstatic void 11871558Srgrimespr_icmph(icp) 11881558Srgrimes struct icmp *icp; 11891558Srgrimes{ 11901558Srgrimes switch(icp->icmp_type) { 11911558Srgrimes case ICMP_ECHOREPLY: 11921558Srgrimes (void)printf("Echo Reply\n"); 11931558Srgrimes /* XXX ID + Seq + Data */ 11941558Srgrimes break; 11951558Srgrimes case ICMP_UNREACH: 11961558Srgrimes switch(icp->icmp_code) { 11971558Srgrimes case ICMP_UNREACH_NET: 11981558Srgrimes (void)printf("Destination Net Unreachable\n"); 11991558Srgrimes break; 12001558Srgrimes case ICMP_UNREACH_HOST: 12011558Srgrimes (void)printf("Destination Host Unreachable\n"); 12021558Srgrimes break; 12031558Srgrimes case ICMP_UNREACH_PROTOCOL: 12041558Srgrimes (void)printf("Destination Protocol Unreachable\n"); 12051558Srgrimes break; 12061558Srgrimes case ICMP_UNREACH_PORT: 12071558Srgrimes (void)printf("Destination Port Unreachable\n"); 12081558Srgrimes break; 12091558Srgrimes case ICMP_UNREACH_NEEDFRAG: 121017724Sfenner (void)printf("frag needed and DF set (MTU %d)\n", 121128059Sfenner ntohs(icp->icmp_nextmtu)); 12121558Srgrimes break; 12131558Srgrimes case ICMP_UNREACH_SRCFAIL: 12141558Srgrimes (void)printf("Source Route Failed\n"); 12151558Srgrimes break; 121617724Sfenner case ICMP_UNREACH_FILTER_PROHIB: 121717724Sfenner (void)printf("Communication prohibited by filter\n"); 121817724Sfenner break; 12191558Srgrimes default: 12201558Srgrimes (void)printf("Dest Unreachable, Bad Code: %d\n", 12211558Srgrimes icp->icmp_code); 12221558Srgrimes break; 12231558Srgrimes } 12241558Srgrimes /* Print returned IP header information */ 12251558Srgrimes#ifndef icmp_data 12261558Srgrimes pr_retip(&icp->icmp_ip); 12271558Srgrimes#else 12281558Srgrimes pr_retip((struct ip *)icp->icmp_data); 12291558Srgrimes#endif 12301558Srgrimes break; 12311558Srgrimes case ICMP_SOURCEQUENCH: 12321558Srgrimes (void)printf("Source Quench\n"); 12331558Srgrimes#ifndef icmp_data 12341558Srgrimes pr_retip(&icp->icmp_ip); 12351558Srgrimes#else 12361558Srgrimes pr_retip((struct ip *)icp->icmp_data); 12371558Srgrimes#endif 12381558Srgrimes break; 12391558Srgrimes case ICMP_REDIRECT: 12401558Srgrimes switch(icp->icmp_code) { 12411558Srgrimes case ICMP_REDIRECT_NET: 12421558Srgrimes (void)printf("Redirect Network"); 12431558Srgrimes break; 12441558Srgrimes case ICMP_REDIRECT_HOST: 12451558Srgrimes (void)printf("Redirect Host"); 12461558Srgrimes break; 12471558Srgrimes case ICMP_REDIRECT_TOSNET: 12481558Srgrimes (void)printf("Redirect Type of Service and Network"); 12491558Srgrimes break; 12501558Srgrimes case ICMP_REDIRECT_TOSHOST: 12511558Srgrimes (void)printf("Redirect Type of Service and Host"); 12521558Srgrimes break; 12531558Srgrimes default: 12541558Srgrimes (void)printf("Redirect, Bad Code: %d", icp->icmp_code); 12551558Srgrimes break; 12561558Srgrimes } 125728059Sfenner (void)printf("(New addr: %s)\n", inet_ntoa(icp->icmp_gwaddr)); 12581558Srgrimes#ifndef icmp_data 12591558Srgrimes pr_retip(&icp->icmp_ip); 12601558Srgrimes#else 12611558Srgrimes pr_retip((struct ip *)icp->icmp_data); 12621558Srgrimes#endif 12631558Srgrimes break; 12641558Srgrimes case ICMP_ECHO: 12651558Srgrimes (void)printf("Echo Request\n"); 12661558Srgrimes /* XXX ID + Seq + Data */ 12671558Srgrimes break; 12681558Srgrimes case ICMP_TIMXCEED: 12691558Srgrimes switch(icp->icmp_code) { 12701558Srgrimes case ICMP_TIMXCEED_INTRANS: 12711558Srgrimes (void)printf("Time to live exceeded\n"); 12721558Srgrimes break; 12731558Srgrimes case ICMP_TIMXCEED_REASS: 12741558Srgrimes (void)printf("Frag reassembly time exceeded\n"); 12751558Srgrimes break; 12761558Srgrimes default: 12771558Srgrimes (void)printf("Time exceeded, Bad Code: %d\n", 12781558Srgrimes icp->icmp_code); 12791558Srgrimes break; 12801558Srgrimes } 12811558Srgrimes#ifndef icmp_data 12821558Srgrimes pr_retip(&icp->icmp_ip); 12831558Srgrimes#else 12841558Srgrimes pr_retip((struct ip *)icp->icmp_data); 12851558Srgrimes#endif 12861558Srgrimes break; 12871558Srgrimes case ICMP_PARAMPROB: 12881558Srgrimes (void)printf("Parameter problem: pointer = 0x%02x\n", 12891558Srgrimes icp->icmp_hun.ih_pptr); 12901558Srgrimes#ifndef icmp_data 12911558Srgrimes pr_retip(&icp->icmp_ip); 12921558Srgrimes#else 12931558Srgrimes pr_retip((struct ip *)icp->icmp_data); 12941558Srgrimes#endif 12951558Srgrimes break; 12961558Srgrimes case ICMP_TSTAMP: 12971558Srgrimes (void)printf("Timestamp\n"); 12981558Srgrimes /* XXX ID + Seq + 3 timestamps */ 12991558Srgrimes break; 13001558Srgrimes case ICMP_TSTAMPREPLY: 13011558Srgrimes (void)printf("Timestamp Reply\n"); 13021558Srgrimes /* XXX ID + Seq + 3 timestamps */ 13031558Srgrimes break; 13041558Srgrimes case ICMP_IREQ: 13051558Srgrimes (void)printf("Information Request\n"); 13061558Srgrimes /* XXX ID + Seq */ 13071558Srgrimes break; 13081558Srgrimes case ICMP_IREQREPLY: 13091558Srgrimes (void)printf("Information Reply\n"); 13101558Srgrimes /* XXX ID + Seq */ 13111558Srgrimes break; 13121558Srgrimes case ICMP_MASKREQ: 13131558Srgrimes (void)printf("Address Mask Request\n"); 13141558Srgrimes break; 13151558Srgrimes case ICMP_MASKREPLY: 13161558Srgrimes (void)printf("Address Mask Reply\n"); 13171558Srgrimes break; 131817724Sfenner case ICMP_ROUTERADVERT: 131917724Sfenner (void)printf("Router Advertisement\n"); 132017724Sfenner break; 132117724Sfenner case ICMP_ROUTERSOLICIT: 132217724Sfenner (void)printf("Router Solicitation\n"); 132317724Sfenner break; 13241558Srgrimes default: 13251558Srgrimes (void)printf("Bad ICMP type: %d\n", icp->icmp_type); 13261558Srgrimes } 13271558Srgrimes} 13281558Srgrimes 13291558Srgrimes/* 13301558Srgrimes * pr_iph -- 13311558Srgrimes * Print an IP header with options. 13321558Srgrimes */ 133323247Swollmanstatic void 13341558Srgrimespr_iph(ip) 13351558Srgrimes struct ip *ip; 13361558Srgrimes{ 13371558Srgrimes int hlen; 13381558Srgrimes u_char *cp; 13391558Srgrimes 13401558Srgrimes hlen = ip->ip_hl << 2; 13411558Srgrimes cp = (u_char *)ip + 20; /* point to options */ 13421558Srgrimes 134317724Sfenner (void)printf("Vr HL TOS Len ID Flg off TTL Pro cks Src Dst\n"); 13441558Srgrimes (void)printf(" %1x %1x %02x %04x %04x", 134517724Sfenner ip->ip_v, ip->ip_hl, ip->ip_tos, ntohs(ip->ip_len), 134617724Sfenner ntohs(ip->ip_id)); 134736089Sjb (void)printf(" %1lx %04lx", 134836089Sjb (u_long) (ntohl(ip->ip_off) & 0xe000) >> 13, 134936089Sjb (u_long) ntohl(ip->ip_off) & 0x1fff); 135017724Sfenner (void)printf(" %02x %02x %04x", ip->ip_ttl, ip->ip_p, 135117724Sfenner ntohs(ip->ip_sum)); 13521558Srgrimes (void)printf(" %s ", inet_ntoa(*(struct in_addr *)&ip->ip_src.s_addr)); 13531558Srgrimes (void)printf(" %s ", inet_ntoa(*(struct in_addr *)&ip->ip_dst.s_addr)); 135417724Sfenner /* dump any option bytes */ 13551558Srgrimes while (hlen-- > 20) { 13561558Srgrimes (void)printf("%02x", *cp++); 13571558Srgrimes } 13581558Srgrimes (void)putchar('\n'); 13591558Srgrimes} 13601558Srgrimes 13611558Srgrimes/* 13621558Srgrimes * pr_addr -- 13631558Srgrimes * Return an ascii host address as a dotted quad and optionally with 13641558Srgrimes * a hostname. 13651558Srgrimes */ 136623247Swollmanstatic char * 136723247Swollmanpr_addr(ina) 136823247Swollman struct in_addr ina; 13691558Srgrimes{ 13701558Srgrimes struct hostent *hp; 137123251Simp static char buf[16 + 3 + MAXHOSTNAMELEN]; 13721558Srgrimes 13731558Srgrimes if ((options & F_NUMERIC) || 137423247Swollman !(hp = gethostbyaddr((char *)&ina, 4, AF_INET))) 137523247Swollman return inet_ntoa(ina); 13761558Srgrimes else 137717320Speter (void)snprintf(buf, sizeof(buf), "%s (%s)", hp->h_name, 137823247Swollman inet_ntoa(ina)); 13791558Srgrimes return(buf); 13801558Srgrimes} 13811558Srgrimes 13821558Srgrimes/* 13831558Srgrimes * pr_retip -- 13841558Srgrimes * Dump some info on a returned (via ICMP) IP packet. 13851558Srgrimes */ 138623247Swollmanstatic void 13871558Srgrimespr_retip(ip) 13881558Srgrimes struct ip *ip; 13891558Srgrimes{ 13901558Srgrimes int hlen; 13911558Srgrimes u_char *cp; 13921558Srgrimes 13931558Srgrimes pr_iph(ip); 13941558Srgrimes hlen = ip->ip_hl << 2; 13951558Srgrimes cp = (u_char *)ip + hlen; 13961558Srgrimes 13971558Srgrimes if (ip->ip_p == 6) 13981558Srgrimes (void)printf("TCP: from port %u, to port %u (decimal)\n", 13991558Srgrimes (*cp * 256 + *(cp + 1)), (*(cp + 2) * 256 + *(cp + 3))); 14001558Srgrimes else if (ip->ip_p == 17) 14011558Srgrimes (void)printf("UDP: from port %u, to port %u (decimal)\n", 14021558Srgrimes (*cp * 256 + *(cp + 1)), (*(cp + 2) * 256 + *(cp + 3))); 14031558Srgrimes} 14041558Srgrimes 140523247Swollmanstatic void 14061558Srgrimesfill(bp, patp) 14071558Srgrimes char *bp, *patp; 14081558Srgrimes{ 140992806Sobrien int ii, jj, kk; 14101558Srgrimes int pat[16]; 14111558Srgrimes char *cp; 14121558Srgrimes 141323247Swollman for (cp = patp; *cp; cp++) { 141423247Swollman if (!isxdigit(*cp)) 141523247Swollman errx(EX_USAGE, 141623247Swollman "patterns must be specified as hex digits"); 141723247Swollman 141823247Swollman } 14191558Srgrimes ii = sscanf(patp, 14201558Srgrimes "%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x", 14211558Srgrimes &pat[0], &pat[1], &pat[2], &pat[3], &pat[4], &pat[5], &pat[6], 14221558Srgrimes &pat[7], &pat[8], &pat[9], &pat[10], &pat[11], &pat[12], 14231558Srgrimes &pat[13], &pat[14], &pat[15]); 14241558Srgrimes 14251558Srgrimes if (ii > 0) 14261558Srgrimes for (kk = 0; 142736089Sjb kk <= MAXPACKET - (8 + PHDR_LEN + ii); 14281558Srgrimes kk += ii) 14291558Srgrimes for (jj = 0; jj < ii; ++jj) 14301558Srgrimes bp[jj + kk] = pat[jj]; 14311558Srgrimes if (!(options & F_QUIET)) { 14321558Srgrimes (void)printf("PATTERN: 0x"); 14331558Srgrimes for (jj = 0; jj < ii; ++jj) 14341558Srgrimes (void)printf("%02x", bp[jj] & 0xFF); 14351558Srgrimes (void)printf("\n"); 14361558Srgrimes } 14371558Srgrimes} 14381558Srgrimes 143923247Swollmanstatic void 144037671Scharnierusage() 14411558Srgrimes{ 144242337Simp fprintf(stderr, "%s\n%s\n%s\n", 144374029Sru"usage: ping [-QRadfnqrv] [-c count] [-i wait] [-l preload] [-m ttl]", 144474029Sru" [-p pattern] " 144555505Sshin#ifdef IPSEC 144655505Sshin#ifdef IPSEC_POLICY_IPSEC 144755505Sshin"[-P policy] " 144855505Sshin#endif 144955505Sshin#endif 145055996Sbillf"[-s packetsize] [-S src_addr] [-t timeout]", 145155996Sbillf" [host | [-L] [-I iface] [-T ttl] mcast-group]"); 145223247Swollman exit(EX_USAGE); 14531558Srgrimes} 1454