#include <sys/param.h>
#include <sys/socket.h>
#include <sys/file.h>
#include <sys/time.h>
#include <sys/signal.h>
#include <netinet/in_systm.h>
#include <netinet/in.h>
#include <netinet/ip.h>
#include <netinet/ip_icmp.h>
#include <netinet/ip_var.h>
#include <netdb.h>
#include <unistd.h>
#include <stdio.h>
#include <ctype.h>
#include <errno.h>
#include <string.h>
#define DEFDATALEN (64 - 8)
#define MAXIPLEN 60
#define MAXICMPLEN 76
#define MAXPACKET (65536 - 60 - 8)
#define MAXWAIT 10
#define NROUTES 9
#define A(bit) rcvd_tbl[(bit)>>3]
#define B(bit) (1 << ((bit) & 0x07))
#define SET(bit) (A(bit) |= B(bit))
#define CLR(bit) (A(bit) &= (~B(bit)))
#define TST(bit) (A(bit) & B(bit))
int options;
#define F_FLOOD 0x001
#define F_INTERVAL 0x002
#define F_NUMERIC 0x004
#define F_PINGFILLED 0x008
#define F_QUIET 0x010
#define F_RROUTE 0x020
#define F_SO_DEBUG 0x040
#define F_SO_DONTROUTE 0x080
#define F_VERBOSE 0x100
#define MAX_DUP_CHK (8 * 128)
int mx_dup_ck = MAX_DUP_CHK;
char rcvd_tbl[MAX_DUP_CHK / 8];
struct sockaddr whereto;
int datalen = DEFDATALEN;
int s;
u_char outpack[MAXPACKET];
char BSPACE = '\b';
char DOT = '.';
char *hostname;
int ident;
long npackets;
long nreceived;
long nrepeats;
long ntransmitted;
int interval = 1;
int timing;
double tmin = 999999999.0;
double tmax = 0.0;
double tsum = 0.0;
char *pr_addr();
void catcher(), finish();
main(argc, argv)
int argc;
char **argv;
{
extern int errno, optind;
extern char *optarg;
struct timeval timeout;
struct hostent *hp;
struct sockaddr_in *to;
struct protoent *proto;
register int i;
int ch, fdmask, hold, packlen, preload;
u_char *datap, *packet;
char *target, hnamebuf[MAXHOSTNAMELEN], *malloc();
#ifdef IP_OPTIONS
char rspace[3 + 4 * NROUTES + 1];
#endif
preload = 0;
datap = &outpack[8 + sizeof(struct timeval)];
while ((ch = getopt(argc, argv, "Rc:dfh:i:l:np:qrs:v")) != EOF)
switch(ch) {
case 'c':
npackets = atoi(optarg);
if (npackets <= 0) {
(void)fprintf(stderr,
"ping: bad number of packets to transmit.\n");
exit(1);
}
break;
case 'd':
options |= F_SO_DEBUG;
break;
case 'f':
if (getuid()) {
(void)fprintf(stderr,
"ping: %s\n", strerror(EPERM));
exit(1);
}
options |= F_FLOOD;
setbuf(stdout, (char *)NULL);
break;
case 'i':
interval = atoi(optarg);
if (interval <= 0) {
(void)fprintf(stderr,
"ping: bad timing interval.\n");
exit(1);
}
options |= F_INTERVAL;
break;
case 'l':
if (getuid()) {
(void)fprintf(stderr,
"ping: %s\n", strerror(EPERM));
exit(1);
}
preload = atoi(optarg);
if (preload < 0) {
(void)fprintf(stderr,
"ping: bad preload value.\n");
exit(1);
}
break;
case 'n':
options |= F_NUMERIC;
break;
case 'p':
options |= F_PINGFILLED;
fill((char *)datap, optarg);
break;
case 'q':
options |= F_QUIET;
break;
case 'R':
options |= F_RROUTE;
break;
case 'r':
options |= F_SO_DONTROUTE;
break;
case 's':
datalen = atoi(optarg);
if (datalen > MAXPACKET) {
(void)fprintf(stderr,
"ping: packet size too large.\n");
exit(1);
}
if (datalen <= 0) {
(void)fprintf(stderr,
"ping: illegal packet size.\n");
exit(1);
}
break;
case 'v':
options |= F_VERBOSE;
break;
default:
usage();
}
argc -= optind;
argv += optind;
if (argc != 1)
usage();
target = *argv;
memset(&whereto, 0, sizeof(struct sockaddr));
to = (struct sockaddr_in *)&whereto;
to->sin_family = AF_INET;
to->sin_addr.s_addr = inet_addr(target);
if (to->sin_addr.s_addr != (u_int)-1)
hostname = target;
else {
hp = gethostbyname(target);
if (!hp) {
(void)fprintf(stderr,
"ping: unknown host %s\n", target);
exit(1);
}
to->sin_family = hp->h_addrtype;
memmove(&to->sin_addr, hp->h_addr, hp->h_length);
(void)strncpy(hnamebuf, hp->h_name, sizeof(hnamebuf) - 1);
hostname = hnamebuf;
}
if (options & F_FLOOD && options & F_INTERVAL) {
(void)fprintf(stderr,
"ping: -f and -i incompatible options.\n");
exit(1);
}
if (datalen >= sizeof(struct timeval))
timing = 1;
packlen = datalen + MAXIPLEN + MAXICMPLEN;
if (!(packet = (u_char *)malloc((u_int)packlen))) {
(void)fprintf(stderr, "ping: out of memory.\n");
exit(1);
}
if (!(options & F_PINGFILLED))
for (i = 8; i < datalen; ++i)
*datap++ = i;
ident = getpid() & 0xFFFF;
if (!(proto = getprotobyname("icmp"))) {
(void)fprintf(stderr, "ping: unknown protocol icmp.\n");
exit(1);
}
if ((s = socket(AF_INET, SOCK_RAW, proto->p_proto)) < 0) {
perror("ping: socket");
exit(1);
}
hold = 1;
if (options & F_SO_DEBUG)
(void)setsockopt(s, SOL_SOCKET, SO_DEBUG, (char *)&hold,
sizeof(hold));
if (options & F_SO_DONTROUTE)
(void)setsockopt(s, SOL_SOCKET, SO_DONTROUTE, (char *)&hold,
sizeof(hold));
if (options & F_RROUTE) {
#ifdef IP_OPTIONS
rspace[IPOPT_OPTVAL] = IPOPT_RR;
rspace[IPOPT_OLEN] = sizeof(rspace)-1;
rspace[IPOPT_OFFSET] = IPOPT_MINOFF;
if (setsockopt(s, IPPROTO_IP, IP_OPTIONS, rspace,
sizeof(rspace)) < 0) {
perror("ping: record route");
exit(1);
}
#else
(void)fprintf(stderr,
"ping: record route not available in this implementation.\n");
exit(1);
#endif
}
(void)setsockopt(s, SOL_SOCKET, SO_RCVBUF, &packlen, sizeof(packlen));
if (to->sin_family == AF_INET)
(void)printf("PING %s (%s): %d data bytes\n", hostname,
inet_ntoa(*(struct in_addr *)&to->sin_addr.s_addr),
datalen);
else
(void)printf("PING %s: %d data bytes\n", hostname, datalen);
(void)signal(SIGINT, finish);
(void)signal(SIGALRM, catcher);
while (preload--)
pinger();
if ((options & F_FLOOD) == 0)
catcher();
for (;;) {
struct sockaddr_in from;
register int cc;
int fromlen;
sigset_t omask, nmask;
if (options & F_FLOOD) {
pinger();
timeout.tv_sec = 0;
timeout.tv_usec = 10000;
fdmask = 1 << s;
if (select(s + 1, (fd_set *)&fdmask, (fd_set *)NULL,
(fd_set *)NULL, &timeout) < 1)
continue;
}
fromlen = sizeof(from);
if ((cc = recvfrom(s, (char *)packet, packlen, 0,
(struct sockaddr *)&from, &fromlen)) < 0) {
if (errno == EINTR)
continue;
perror("ping: recvfrom");
continue;
}
sigemptyset(&nmask);
sigaddset(&nmask, SIGALRM);
sigprocmask(SIG_BLOCK, &nmask, &omask);
pr_pack((char *)packet, cc, &from);
sigprocmask(SIG_SETMASK, &omask, NULL);
if (npackets && nreceived >= npackets)
break;
}
finish();
}
void
catcher()
{
int waittime;
pinger();
(void)signal(SIGALRM, catcher);
if (!npackets || ntransmitted < npackets)
alarm((u_int)interval);
else {
if (nreceived) {
waittime = 2 * tmax / 1000;
if (!waittime)
waittime = 1;
} else
waittime = MAXWAIT;
(void)signal(SIGALRM, finish);
(void)alarm((u_int)waittime);
}
}
pinger()
{
register struct icmp *icp;
register int cc;
int i;
icp = (struct icmp *)outpack;
icp->icmp_type = ICMP_ECHO;
icp->icmp_code = 0;
icp->icmp_cksum = 0;
icp->icmp_seq = ntransmitted++;
icp->icmp_id = ident;
CLR(icp->icmp_seq % mx_dup_ck);
if (timing)
(void)gettimeofday((struct timeval *)&outpack[8],
(struct timezone *)NULL);
cc = datalen + 8;
icp->icmp_cksum = in_cksum((u_short *)icp, cc);
i = sendto(s, (char *)outpack, cc, 0, &whereto,
sizeof(struct sockaddr));
if (i < 0 || i != cc) {
if (i < 0)
perror("ping: sendto");
(void)printf("ping: wrote %s %d chars, ret=%d\n",
hostname, cc, i);
}
if (!(options & F_QUIET) && options & F_FLOOD)
(void)write(STDOUT_FILENO, &DOT, 1);
}
pr_pack(buf, cc, from)
char *buf;
int cc;
struct sockaddr_in *from;
{
register struct icmp *icp;
register u_long l;
register u_int i, j;
register u_char *cp,*dp;
static int old_rrlen;
static char old_rr[MAX_IPOPTLEN];
struct ip *ip;
struct timeval tv, *tp;
double triptime;
int hlen, dupflag;
(void)gettimeofday(&tv, (struct timezone *)NULL);
ip = (struct ip *)buf;
hlen = ip->ip_hl << 2;
if (cc < hlen + ICMP_MINLEN) {
if (options & F_VERBOSE)
(void)fprintf(stderr,
"ping: packet too short (%d bytes) from %s\n", cc,
inet_ntoa(*(struct in_addr *)&from->sin_addr.s_addr));
return;
}
cc -= hlen;
icp = (struct icmp *)(buf + hlen);
if (icp->icmp_type == ICMP_ECHOREPLY) {
if (icp->icmp_id != ident)
return;
++nreceived;
if (timing) {
#ifndef icmp_data
tp = (struct timeval *)&icp->icmp_ip;
#else
tp = (struct timeval *)icp->icmp_data;
#endif
tvsub(&tv, tp);
triptime = ((double)tv.tv_sec) * 1000.0 +
((double)tv.tv_usec) / 1000.0;
tsum += triptime;
if (triptime < tmin)
tmin = triptime;
if (triptime > tmax)
tmax = triptime;
}
if (TST(icp->icmp_seq % mx_dup_ck)) {
++nrepeats;
--nreceived;
dupflag = 1;
} else {
SET(icp->icmp_seq % mx_dup_ck);
dupflag = 0;
}
if (options & F_QUIET)
return;
if (options & F_FLOOD)
(void)write(STDOUT_FILENO, &BSPACE, 1);
else {
(void)printf("%d bytes from %s: icmp_seq=%u", cc,
inet_ntoa(*(struct in_addr *)&from->sin_addr.s_addr),
icp->icmp_seq);
(void)printf(" ttl=%d", ip->ip_ttl);
if (timing)
(void)printf(" time=%g ms", triptime);
if (dupflag)
(void)printf(" (DUP!)");
cp = (u_char*)&icp->icmp_data[8];
dp = &outpack[8 + sizeof(struct timeval)];
for (i = 8; i < datalen; ++i, ++cp, ++dp) {
if (*cp != *dp) {
(void)printf("\nwrong data byte #%d should be 0x%x but was 0x%x",
i, *dp, *cp);
cp = (u_char*)&icp->icmp_data[0];
for (i = 8; i < datalen; ++i, ++cp) {
if ((i % 32) == 8)
(void)printf("\n\t");
(void)printf("%x ", *cp);
}
break;
}
}
}
} else {
if (!(options & F_VERBOSE))
return;
(void)printf("%d bytes from %s: ", cc,
pr_addr(from->sin_addr.s_addr));
pr_icmph(icp);
}
cp = (u_char *)buf + sizeof(struct ip);
for (; hlen > (int)sizeof(struct ip); --hlen, ++cp)
switch (*cp) {
case IPOPT_EOL:
hlen = 0;
break;
case IPOPT_LSRR:
(void)printf("\nLSRR: ");
hlen -= 2;
j = *++cp;
++cp;
if (j > IPOPT_MINOFF)
for (;;) {
l = *++cp;
l = (l<<8) + *++cp;
l = (l<<8) + *++cp;
l = (l<<8) + *++cp;
if (l == 0)
(void)printf("\t0.0.0.0");
else
(void)printf("\t%s", pr_addr(ntohl(l)));
hlen -= 4;
j -= 4;
if (j <= IPOPT_MINOFF)
break;
(void)putchar('\n');
}
break;
case IPOPT_RR:
j = *++cp;
i = *++cp;
hlen -= 2;
if (i > j)
i = j;
i -= IPOPT_MINOFF;
if (i <= 0)
continue;
if (i == old_rrlen
&& cp == (u_char *)buf + sizeof(struct ip) + 2
&& !memcmp(cp, old_rr, i)
&& !(options & F_FLOOD)) {
(void)printf("\t(same route)");
i = ((i + 3) / 4) * 4;
hlen -= i;
cp += i;
break;
}
if (i < MAX_IPOPTLEN) {
old_rrlen = i;
memcpy(old_rr, cp, i);
} else
old_rrlen = 0;
(void)printf("\nRR: ");
j = 0;
for (;;) {
l = *++cp;
l = (l<<8) + *++cp;
l = (l<<8) + *++cp;
l = (l<<8) + *++cp;
if (l == 0)
(void)printf("\t0.0.0.0");
else
(void)printf("\t%s", pr_addr(ntohl(l)));
hlen -= 4;
i -= 4;
j += 4;
if (i <= 0)
break;
if (j >= MAX_IPOPTLEN) {
(void)printf("\t(truncated route)");
break;
}
(void)putchar('\n');
}
break;
case IPOPT_NOP:
(void)printf("\nNOP");
break;
default:
(void)printf("\nunknown option %x", *cp);
break;
}
if (!(options & F_FLOOD)) {
(void)putchar('\n');
(void)fflush(stdout);
}
}
in_cksum(addr, len)
u_short *addr;
int len;
{
register int nleft = len;
register u_short *w = addr;
register int sum = 0;
u_short answer = 0;
while (nleft > 1) {
sum += *w++;
nleft -= 2;
}
if (nleft == 1) {
*(u_char *)(&answer) = *(u_char *)w ;
sum += answer;
}
sum = (sum >> 16) + (sum & 0xffff);
sum += (sum >> 16);
answer = ~sum;
return(answer);
}
tvsub(out, in)
register struct timeval *out, *in;
{
if ((out->tv_usec -= in->tv_usec) < 0) {
--out->tv_sec;
out->tv_usec += 1000000;
}
out->tv_sec -= in->tv_sec;
}
void
finish()
{
register int i;
(void)signal(SIGINT, SIG_IGN);
(void)putchar('\n');
(void)fflush(stdout);
(void)printf("--- %s ping statistics ---\n", hostname);
(void)printf("%ld packets transmitted, ", ntransmitted);
(void)printf("%ld packets received, ", nreceived);
if (nrepeats)
(void)printf("+%ld duplicates, ", nrepeats);
if (ntransmitted)
if (nreceived > ntransmitted)
(void)printf("-- somebody's printing up packets!");
else
(void)printf("%d%% packet loss",
(int) (((ntransmitted - nreceived) * 100) /
ntransmitted));
(void)putchar('\n');
if (nreceived && timing) {
i = 1000.0 * tsum / (nreceived + nrepeats);
(void)printf("round-trip min/avg/max = %g/%g/%g ms\n",
tmin, ((double)i) / 1000.0, tmax);
}
exit(0);
}
#ifdef notdef
static char *ttab[] = {
"Echo Reply",
"Dest Unreachable",
"Source Quench",
"Redirect",
"Echo",
"Time Exceeded",
"Parameter Problem",
"Timestamp",
"Timestamp Reply",
"Info Request",
"Info Reply"
};
#endif
pr_icmph(icp)
struct icmp *icp;
{
switch(icp->icmp_type) {
case ICMP_ECHOREPLY:
(void)printf("Echo Reply\n");
break;
case ICMP_UNREACH:
switch(icp->icmp_code) {
case ICMP_UNREACH_NET:
(void)printf("Destination Net Unreachable\n");
break;
case ICMP_UNREACH_HOST:
(void)printf("Destination Host Unreachable\n");
break;
case ICMP_UNREACH_PROTOCOL:
(void)printf("Destination Protocol Unreachable\n");
break;
case ICMP_UNREACH_PORT:
(void)printf("Destination Port Unreachable\n");
break;
case ICMP_UNREACH_NEEDFRAG:
(void)printf("frag needed and DF set\n");
break;
case ICMP_UNREACH_SRCFAIL:
(void)printf("Source Route Failed\n");
break;
default:
(void)printf("Dest Unreachable, Bad Code: %d\n",
icp->icmp_code);
break;
}
#ifndef icmp_data
pr_retip(&icp->icmp_ip);
#else
pr_retip((struct ip *)icp->icmp_data);
#endif
break;
case ICMP_SOURCEQUENCH:
(void)printf("Source Quench\n");
#ifndef icmp_data
pr_retip(&icp->icmp_ip);
#else
pr_retip((struct ip *)icp->icmp_data);
#endif
break;
case ICMP_REDIRECT:
switch(icp->icmp_code) {
case ICMP_REDIRECT_NET:
(void)printf("Redirect Network");
break;
case ICMP_REDIRECT_HOST:
(void)printf("Redirect Host");
break;
case ICMP_REDIRECT_TOSNET:
(void)printf("Redirect Type of Service and Network");
break;
case ICMP_REDIRECT_TOSHOST:
(void)printf("Redirect Type of Service and Host");
break;
default:
(void)printf("Redirect, Bad Code: %d", icp->icmp_code);
break;
}
(void)printf("(New addr: 0x%08lx)\n", icp->icmp_gwaddr.s_addr);
#ifndef icmp_data
pr_retip(&icp->icmp_ip);
#else
pr_retip((struct ip *)icp->icmp_data);
#endif
break;
case ICMP_ECHO:
(void)printf("Echo Request\n");
break;
case ICMP_TIMXCEED:
switch(icp->icmp_code) {
case ICMP_TIMXCEED_INTRANS:
(void)printf("Time to live exceeded\n");
break;
case ICMP_TIMXCEED_REASS:
(void)printf("Frag reassembly time exceeded\n");
break;
default:
(void)printf("Time exceeded, Bad Code: %d\n",
icp->icmp_code);
break;
}
#ifndef icmp_data
pr_retip(&icp->icmp_ip);
#else
pr_retip((struct ip *)icp->icmp_data);
#endif
break;
case ICMP_PARAMPROB:
(void)printf("Parameter problem: pointer = 0x%02x\n",
icp->icmp_hun.ih_pptr);
#ifndef icmp_data
pr_retip(&icp->icmp_ip);
#else
pr_retip((struct ip *)icp->icmp_data);
#endif
break;
case ICMP_TSTAMP:
(void)printf("Timestamp\n");
break;
case ICMP_TSTAMPREPLY:
(void)printf("Timestamp Reply\n");
break;
case ICMP_IREQ:
(void)printf("Information Request\n");
break;
case ICMP_IREQREPLY:
(void)printf("Information Reply\n");
break;
#ifdef ICMP_MASKREQ
case ICMP_MASKREQ:
(void)printf("Address Mask Request\n");
break;
#endif
#ifdef ICMP_MASKREPLY
case ICMP_MASKREPLY:
(void)printf("Address Mask Reply\n");
break;
#endif
default:
(void)printf("Bad ICMP type: %d\n", icp->icmp_type);
}
}
pr_iph(ip)
struct ip *ip;
{
int hlen;
u_char *cp;
hlen = ip->ip_hl << 2;
cp = (u_char *)ip + 20;
(void)printf("Vr HL TOS Len ID Flg off TTL Pro cks Src Dst Data\n");
(void)printf(" %1x %1x %02x %04x %04x",
ip->ip_v, ip->ip_hl, ip->ip_tos, ip->ip_len, ip->ip_id);
(void)printf(" %1x %04x", ((ip->ip_off) & 0xe000) >> 13,
(ip->ip_off) & 0x1fff);
(void)printf(" %02x %02x %04x", ip->ip_ttl, ip->ip_p, ip->ip_sum);
(void)printf(" %s ", inet_ntoa(*(struct in_addr *)&ip->ip_src.s_addr));
(void)printf(" %s ", inet_ntoa(*(struct in_addr *)&ip->ip_dst.s_addr));
while (hlen-- > 20) {
(void)printf("%02x", *cp++);
}
(void)putchar('\n');
}
char *
pr_addr(l)
u_long l;
{
struct hostent *hp;
static char buf[80];
if ((options & F_NUMERIC) ||
!(hp = gethostbyaddr((char *)&l, 4, AF_INET)))
(void)sprintf(buf, "%s", inet_ntoa(*(struct in_addr *)&l));
else
(void)sprintf(buf, "%s (%s)", hp->h_name,
inet_ntoa(*(struct in_addr *)&l));
return(buf);
}
pr_retip(ip)
struct ip *ip;
{
int hlen;
u_char *cp;
pr_iph(ip);
hlen = ip->ip_hl << 2;
cp = (u_char *)ip + hlen;
if (ip->ip_p == 6)
(void)printf("TCP: from port %u, to port %u (decimal)\n",
(*cp * 256 + *(cp + 1)), (*(cp + 2) * 256 + *(cp + 3)));
else if (ip->ip_p == 17)
(void)printf("UDP: from port %u, to port %u (decimal)\n",
(*cp * 256 + *(cp + 1)), (*(cp + 2) * 256 + *(cp + 3)));
}
fill(bp, patp)
char *bp, *patp;
{
register int ii, jj, kk;
int pat[16];
char *cp;
for (cp = patp; *cp; cp++)
if (!isxdigit(*cp)) {
(void)fprintf(stderr,
"ping: patterns must be specified as hex digits.\n");
exit(1);
}
ii = sscanf(patp,
"%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x",
&pat[0], &pat[1], &pat[2], &pat[3], &pat[4], &pat[5], &pat[6],
&pat[7], &pat[8], &pat[9], &pat[10], &pat[11], &pat[12],
&pat[13], &pat[14], &pat[15]);
if (ii > 0)
for (kk = 0;
kk <= MAXPACKET - (8 + sizeof(struct timeval) + ii);
kk += ii)
for (jj = 0; jj < ii; ++jj)
bp[jj + kk] = pat[jj];
if (!(options & F_QUIET)) {
(void)printf("PATTERN: 0x");
for (jj = 0; jj < ii; ++jj)
(void)printf("%02x", bp[jj] & 0xFF);
(void)printf("\n");
}
}
usage()
{
(void)fprintf(stderr,
"usage: ping [-Rdfnqrv] [-c count] [-i wait] [-l preload]\n\t[-p pattern] [-s packetsize] host\n");
exit(1);
}