first pass for new make

[unix-history] / usr / src / sbin / ping / ping.c

diff --git a/usr/src/sbin/ping/ping.c b/usr/src/sbin/ping/ping.c
index c34b4f7..a6fdcaf 100644 (file)
--- a/usr/src/sbin/ping/ping.c
+++ b/usr/src/sbin/ping/ping.c
@@ -1,6 +1,32 @@
+/*
+ * Copyright (c) 1989 The Regents of the University of California.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Mike Muuss.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that the above copyright notice and this paragraph are
+ * duplicated in all such forms and that any documentation,
+ * advertising materials, and other materials related to such
+ * distribution and use acknowledge that the software was developed
+ * by the University of California, Berkeley.  The name of the
+ * University may not be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ */
+

 #ifndef lint
 #ifndef lint

-static char sccsid[] = "@(#)ping.c     4.3 (Berkeley) %G%";
-#endif
+char copyright[] =
+"@(#) Copyright (c) 1989 The Regents of the University of California.\n\
+ All rights reserved.\n";
+#endif /* not lint */
+
+#ifndef lint
+static char sccsid[] = "@(#)ping.c     5.4 (Berkeley) %G%";
+#endif /* not lint */

 
 /*
  *                     P I N G . C
 
 /*
  *                     P I N G . C


@@ -12,190 +38,354 @@ static char sccsid[] = "@(#)ping.c        4.3 (Berkeley) %G%";
  *     Mike Muuss
  *     U. S. Army Ballistic Research Laboratory
  *     December, 1983
  *     Mike Muuss
  *     U. S. Army Ballistic Research Laboratory
  *     December, 1983

- * Modified at Uc Berkeley

  *
  * Status -
  *     Public Domain.  Distribution Unlimited.
  *
  * Status -
  *     Public Domain.  Distribution Unlimited.

- *

  * Bugs -
  *     More statistics could always be gathered.
  *     This program has to run SUID to ROOT to access the ICMP socket.
  */
 
  * Bugs -
  *     More statistics could always be gathered.
  *     This program has to run SUID to ROOT to access the ICMP socket.
  */
 

-#include <stdio.h>
-#include <errno.h>
-#include <sys/time.h>
-

 #include <sys/param.h>
 #include <sys/socket.h>
 #include <sys/file.h>
 #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/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 <netdb.h>

+#include <unistd.h>
+#include <stdio.h>
+#include <ctype.h>
+#include <errno.h>
+#include <strings.h>
+
+#define        DEFDATALEN      (64 - 8)        /* default data length */
+#define        MAXIPLEN        60
+#define        MAXICMPLEN      76
+#define        MAXPACKET       (65536 - 60 - 8)/* max packet size */
+#define        MAXWAIT         10              /* max seconds to wait for response */
+#define        NROUTES         9               /* number of record route slots */
+
+#define        A(bit)          rcvd_tbl[(bit)>>3]      /* identify byte in array */
+#define        B(bit)          (1 << ((bit) & 0x07))   /* identify bit in byte */
+#define        SET(bit)        (A(bit) |= B(bit))
+#define        CLR(bit)        (A(bit) &= (~B(bit)))
+#define        TST(bit)        (A(bit) & B(bit))
+
+/* various options */
+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        MAXWAIT         10      /* max time to wait for response, sec. */
-char   ttyobuf[4096];
-
-int    verbose;
-u_char packet[1024];
-int    options;
-extern int errno;
-
-int s;                 /* Socket file descriptor */
-struct hostent *hp;    /* Pointer to host info */
-struct timezone tz;    /* leftover */
-
-struct sockaddr whereto;/* Who to ping */
-int datalen;           /* How much data */
-
-char usage[] = "Usage:  ping [-drv] host [data size]\n";
-
+/*
+ * MAX_DUP_CHK is the number of bits in received table, i.e. the maximum
+ * number of received sequence numbers we can keep track of.  Change 128
+ * to 8192 for complete accuracy...
+ */
+#define        MAX_DUP_CHK     (8 * 128)
+int mx_dup_ck = MAX_DUP_CHK;
+char rcvd_tbl[MAX_DUP_CHK / 8];
+
+struct sockaddr whereto;       /* who to ping */
+int datalen = DEFDATALEN;
+int s;                         /* socket file descriptor */
+u_char outpack[MAXPACKET];
+char BSPACE = '\b';            /* characters written for flood */
+char DOT = '.';

 char *hostname;
 char *hostname;

-char hnamebuf[64];
+int ident;                     /* process id to identify our packets */

 
 

-int npackets;
-int ntransmitted = 0;          /* sequence # for outbound packets = #sent */
-int ident;
+/* counters */
+long npackets;                 /* max packets to transmit */
+long nreceived;                        /* # of packets we got back */
+long nrepeats;                 /* number of duplicates */
+long ntransmitted;             /* sequence # for outbound packets = #sent */
+int interval = 1;              /* interval between packets */

 
 

-int nreceived = 0;             /* # of packets we got back */
-int timing = 0;
-int tmin = 999999999;
-int tmax = 0;
-int tsum = 0;                  /* sum of all times, for doing average */
-int finish(), catcher();
+/* timing */
+int timing;                    /* flag to do timing */
+long tmin = LONG_MAX;          /* minimum round trip time */
+long tmax;                     /* maximum round trip time */
+u_long tsum;                   /* sum of all times, for doing average */
+
+u_long inet_addr();
+char *inet_ntoa(), *pr_addr();
+int catcher(), finish();

 
 

-/*
- *                     M A I N
- */

 main(argc, argv)
 main(argc, argv)

-char *argv[];
+       int argc;
+       char **argv;

 {
 {

-       struct sockaddr_in from;
-       char **av = argv;
-       struct sockaddr_in *to = (struct sockaddr_in *) &whereto;
-       int on = 1;
-
-       argc--, av++;
-       while (argc > 0 && *av[0] == '-') {
-               while (*++av[0]) switch (*av[0]) {
-                       case 'd':
-                               options |= SO_DEBUG;
-                               break;
-                       case 'r':
-                               options |= SO_DONTROUTE;
-                               break;
-                       case 'v':
-                               verbose++;
+       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];       /* record route space */
+#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: you must be root to use the -f option.\n");
+                               exit(1);
+                       }
+                       options |= F_FLOOD;
+                       setbuf(stdout, (char *)NULL);
+                       break;
+               case 'i':               /* wait between sending packets */
+                       interval = atoi(optarg);
+                       if (interval <= 0) {
+                               (void)fprintf(stderr,
+                                   "ping: bad timing interval.\n");
+                               exit(1);
+                       }
+                       options |= F_INTERVAL;
+                       break;
+               case 'l':
+                       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':               /* fill buffer with user pattern */
+                       options |= F_PINGFILLED;
+                       fill((char *)datap, optarg);

                                break;
                                break;

+               case 'q':
+                       options |= F_QUIET;
+                       break;
+               case 'R':
+                       options |= F_RROUTE;
+                       break;
+               case 'r':
+                       options |= F_SO_DONTROUTE;
+                       break;
+               case 's':               /* size of packet to send */
+                       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;
+
+       bzero((char *)&whereto, 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);

                }
                }

-               argc--, av++;
-       }
-       if( argc < 1)  {
-               printf(usage);
-               exit(1);
-       }
-
-       bzero( (char *)&whereto, sizeof(struct sockaddr) );
-       hp = gethostbyname(av[0]);
-       if (hp) {

                to->sin_family = hp->h_addrtype;
                bcopy(hp->h_addr, (caddr_t)&to->sin_addr, hp->h_length);
                to->sin_family = hp->h_addrtype;
                bcopy(hp->h_addr, (caddr_t)&to->sin_addr, hp->h_length);

-               hostname = hp->h_name;
-       } else {
-               to->sin_family = AF_INET;
-               to->sin_addr.s_addr = inet_addr(av[1]);
-               if (to->sin_addr.s_addr == -1) {
-                       printf("%s: unknown host %s\n", argv[0], av[1]);
-                       return;
-               }
-               strcpy(hnamebuf, av[1]);
+               (void)strncpy(hnamebuf, hp->h_name, sizeof(hnamebuf) - 1);

                hostname = hnamebuf;
        }
 
                hostname = hnamebuf;
        }
 

-       if( argc >= 2 )
-               datalen = atoi( av[1] );
-       else
-               datalen = 64-8;
-       if (datalen >= sizeof(struct timeval))
+       if (options & F_FLOOD && options & F_INTERVAL) {
+               (void)fprintf(stderr,
+                   "ping: -f and -i incompatible options.\n");
+               exit(1);
+       }
+
+       if (datalen >= sizeof(struct timeval))  /* can we time transfer */

                timing = 1;
                timing = 1;

-       if (argc > 2)
-               npackets = atoi(av[2]);
+       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;
 
 
        ident = getpid() & 0xFFFF;
 

-       if ((s = socket(AF_INET, SOCK_RAW, IPPROTO_ICMP)) < 0) {
+       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");
                perror("ping: socket");

-               exit(5);
+               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));
+
+       /* record route option */
+       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 /* IP_OPTIONS */

        }
        }

-       if (options & SO_DEBUG)
-               setsockopt(s, SOL_SOCKET, SO_DEBUG, &on, sizeof(on));
-       if (options & SO_DONTROUTE)
-               setsockopt(s, SOL_SOCKET, SO_DONTROUTE, &on, sizeof(on));

 
 

-       printf("PING %s: %d data bytes\n", hostname, datalen );
+       /*
+        * When pinging the broadcast address, you can get a lot of answers.
+        * Doing something so evil is useful if you are trying to stress the
+        * ethernet, or just want to fill the arp cache to get some stuff for
+        * /etc/ethers.
+        */
+       hold = 48 * 1024;
+       (void)setsockopt(s, SOL_SOCKET, SO_RCVBUF, (char *)&hold,
+           sizeof(hold));
+
+       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);

 
 

-       setbuffer( stdout, ttyobuf, sizeof(ttyobuf) );
+       (void)signal(SIGINT, finish);
+       (void)signal(SIGALRM, catcher);

 
 

-       signal( SIGINT, finish );
-       signal(SIGALRM, catcher);
+       while (preload--)               /* fire off them quickies */
+               pinger();

 
 

-       catcher();      /* start things going */
+       if ((options & F_FLOOD) == 0)
+               catcher();              /* start things going */

 
        for (;;) {
 
        for (;;) {

-               int len = sizeof (packet);
-               int fromlen = sizeof (from);
-               int cc;
-
-               if ( (cc=recvfrom(s, packet, len, 0, &from, &fromlen)) < 0) {
-                       if( errno == EINTR )
+               struct sockaddr_in from;
+               register int cc;
+               int fromlen;
+
+               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;
                }
                                continue;
                        perror("ping: recvfrom");
                        continue;
                }

-               pr_pack( packet, cc, &from );
+               pr_pack((char *)packet, cc, &from);

                if (npackets && nreceived >= npackets)
                if (npackets && nreceived >= npackets)

-                       finish();
+                       break;

        }
        }

-       /*NOTREACHED*/
+       finish();
+       /* NOTREACHED */

 }
 
 /*
 }
 
 /*

- *                     C A T C H E R
- * 
- * This routine causes another PING to be transmitted, and then
+ * catcher --
+ *     This routine causes another PING to be transmitted, and then

  * schedules another SIGALRM for 1 second from now.
  * 
  * schedules another SIGALRM for 1 second from now.
  * 

- * Bug -
- *     Our sense of time will slowly skew (ie, packets will not be launched
- *     exactly at 1-second intervals).  This does not affect the quality
- *     of the delay and loss statistics.
+ * bug --
+ *     Our sense of time will slowly skew (i.e., packets will not be
+ * launched exactly at 1-second intervals).  This does not affect the
+ * quality of the delay and loss statistics.

  */
 catcher()
 {
        int waittime;
 
        pinger();
  */
 catcher()
 {
        int waittime;
 
        pinger();

-       if (npackets == 0 || ntransmitted < npackets)
-               alarm(1);
+       (void)signal(SIGALRM, catcher);
+       if (!npackets || ntransmitted < npackets)
+               alarm((u_int)interval);

        else {
                if (nreceived) {
                        waittime = 2 * tmax / 1000;
        else {
                if (nreceived) {
                        waittime = 2 * tmax / 1000;

-                       if (waittime == 0)
+                       if (!waittime)

                                waittime = 1;
                } else
                        waittime = MAXWAIT;
                                waittime = 1;
                } else
                        waittime = MAXWAIT;

-               signal(SIGALRM, finish);
-               alarm(waittime);
+               (void)signal(SIGALRM, finish);
+               (void)alarm((u_int)waittime);

        }
 }
 
 /*
        }
 }
 
 /*

- *                     P I N G E R
- * 
- * Compose and transmit an ICMP ECHO REQUEST packet.  The IP packet
+ * pinger --
+ *     Compose and transmit an ICMP ECHO REQUEST packet.  The IP packet

  * will be added on by the kernel.  The ID field is our UNIX process ID,
  * and the sequence number is an ascending integer.  The first 8 bytes
  * of the data portion are used to hold a UNIX "timeval" struct in VAX
  * will be added on by the kernel.  The ID field is our UNIX process ID,
  * and the sequence number is an ascending integer.  The first 8 bytes
  * of the data portion are used to hold a UNIX "timeval" struct in VAX


@@ -203,255 +393,570 @@ catcher()
  */
 pinger()
 {
  */
 pinger()
 {

-       static u_char outpack[1024];
-       register struct icmp *icp = (struct icmp *) outpack;
-       int i, cc;
-       register struct timeval *tp = (struct timeval *) &outpack[8];
-       register u_char *datap = &outpack[8+sizeof(struct timeval)];
+       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_type = ICMP_ECHO;
        icp->icmp_code = 0;
        icp->icmp_cksum = 0;
        icp->icmp_seq = ntransmitted++;

-       icp->icmp_id = ident;           /* ID */
+       icp->icmp_id = ident;                   /* ID */

 
 

-       cc = datalen+8;                 /* skips ICMP portion */
+       CLR(icp->icmp_seq % mx_dup_ck);

 
        if (timing)
 
        if (timing)

-               gettimeofday( tp, &tz );
+               (void)gettimeofday((struct timeval *)&outpack[8],
+                   (struct timezone *)NULL);

 
 

-       for( i=8; i<datalen; i++)       /* skip 8 for time */
-               *datap++ = i;
+       cc = datalen + 8;                       /* skips ICMP portion */

 
 

-       /* Compute ICMP checksum here */
-       icp->icmp_cksum = in_cksum( icp, cc );
+       /* compute ICMP checksum here */
+       icp->icmp_cksum = in_cksum((u_short *)icp, cc);

 
 

-       /* cc = sendto(s, msg, len, flags, to, tolen) */
-       i = sendto( s, outpack, cc, 0, &whereto, sizeof(struct sockaddr) );
+       i = sendto(s, (char *)outpack, cc, 0, &whereto,
+           sizeof(struct sockaddr));

 
 

-       if( i < 0 || i != cc )  {
-               if( i<0 )  perror("sendto");
-               printf("ping: wrote %s %d chars, ret=%d\n",
-                       hostname, cc, i );
-               fflush(stdout);
+       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_FLOOD)
+               (void)write(STDOUT_FILENO, &DOT, 1);

 }
 
 /*
 }
 
 /*

- *                     P R _ T Y P E
- *
- * Convert an ICMP "type" field to a printable string.
- */
-char *
-pr_type( t )
-register int t;
-{
-       static char *ttab[] = {
-               "Echo Reply",
-               "ICMP 1",
-               "ICMP 2",
-               "Dest Unreachable",
-               "Source Quence",
-               "Redirect",
-               "ICMP 6",
-               "ICMP 7",
-               "Echo",
-               "ICMP 9",
-               "ICMP 10",
-               "Time Exceeded",
-               "Parameter Problem",
-               "Timestamp",
-               "Timestamp Reply",
-               "Info Request",
-               "Info Reply"
-       };
-
-       if( t < 0 || t > 16 )
-               return("OUT-OF-RANGE");
-
-       return(ttab[t]);
-}
-
-/*
- *                     P R _ P A C K
- *
- * Print out the packet, if it came from us.  This logic is necessary
+ * pr_pack --
+ *     Print out the packet, if it came from us.  This logic is necessary

  * because ALL readers of the ICMP socket get a copy of ALL ICMP packets
  * which arrive ('tis only fair).  This permits multiple copies of this
  * program to be run without having intermingled output (or statistics!).
  */
  * because ALL readers of the ICMP socket get a copy of ALL ICMP packets
  * which arrive ('tis only fair).  This permits multiple copies of this
  * program to be run without having intermingled output (or statistics!).
  */

-pr_pack( icp, cc, from )
-register struct icmp *icp;
-int cc;
-struct sockaddr_in *from;
+pr_pack(buf, cc, from)
+       char *buf;
+       int cc;
+       struct sockaddr_in *from;

 {
 {

-       register long *lp = (long *) packet;
-       register int i;
-       struct timeval tv;
-       struct timeval *tp = (struct timeval *) &packet[8];
-       int triptime;
-
-       from->sin_addr.s_addr = ntohl( from->sin_addr.s_addr );
-       gettimeofday( &tv, &tz );
-
-       if( icp->icmp_type != ICMP_ECHOREPLY )  {
-               if (verbose) {
-                       printf("%d bytes from x%x: ", cc, from->sin_addr.s_addr);
-                       printf("icmp_type=%d (%s)\n",
-                               icp->icmp_type, pr_type(icp->icmp_type) );
-                       for( i=0; i<12; i++)
-                       printf("x%2.2x: x%8.8x\n", i*sizeof(long), *lp++ );
-                       printf("icmp_code=%d\n", icp->icmp_code );
-                       fflush(stdout);
-               }
+       register struct icmp *icp;
+       register u_long l;
+       register 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;
+       long triptime;
+       int hlen, dupflag;
+
+       (void)gettimeofday(&tv, (struct timezone *)NULL);
+
+       /* Check the IP header */
+       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;
        }
                return;
        }

-       if( icp->icmp_id != ident )
-               return;                 /* 'Twas not our ECHO */
-
-       printf("%d bytes from x%x: ", cc, from->sin_addr.s_addr);
-       printf("icmp_seq=%d. ", icp->icmp_seq );
-       if (timing) {
-               tvsub( &tv, tp );
-               triptime = tv.tv_sec*1000+(tv.tv_usec/1000);
-               printf("time=%d. ms\n", triptime );
-               tsum += triptime;
-               if( triptime < tmin )
-                       tmin = triptime;
-               if( triptime > tmax )
-                       tmax = triptime;
-       } else
-               putchar('\n');
-       nreceived++;
-       fflush(stdout);
-}

 
 

+       /* Now the ICMP part */
+       cc -= hlen;
+       icp = (struct icmp *)(buf + hlen);
+       if (icp->icmp_type == ICMP_ECHOREPLY) {
+               if (icp->icmp_id != ident)
+                       return;                 /* 'Twas not our ECHO */
+               ++nreceived;
+               if (timing) {
+#ifndef icmp_data
+                       tp = (struct timeval *)&icp->icmp_ip;
+#else
+                       tp = (struct timeval *)icp->icmp_data;
+#endif
+                       tvsub(&tv, tp);
+                       triptime = tv.tv_sec * 1000 + (tv.tv_usec / 1000);
+                       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=%ld ms", triptime);
+                       if (dupflag)
+                               (void)printf(" (DUP!)");
+                       /* check the data */
+                       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 {
+               /* We've got something other than an ECHOREPLY */
+               if (!(options & F_VERBOSE))
+                       return;
+               (void)printf("%d bytes from %s: ", cc,
+                   pr_addr(from->sin_addr.s_addr));
+               pr_icmph(icp);
+       }
+
+       /* Display any IP options */
+       cp = (u_char *)buf + sizeof(struct ip);
+
+       /* ANSI C will force hlen to unsigned! */
+       for (; hlen > 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;              /* get length */
+                       i = *++cp;              /* and pointer */
+                       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
+                           && !bcmp((char *)cp, old_rr, i)
+                           && !(options & F_FLOOD)) {
+                               (void)printf("\t(same route)");
+                               i = ((i + 3) / 4) * 4;
+                               hlen -= i;
+                               cp += i;
+                               break;
+                       }
+                       old_rrlen = i;
+                       bcopy((char *)cp, old_rr, i);
+                       (void)printf("\nRR: ");
+                       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;
+                               if (i <= 0)
+                                       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);
+       }
+}

 
 /*
 
 /*

- *                     I N _ C K S U M
- *
- * Checksum routine for Internet Protocol family headers (VAX Version).
- *
- * Shamelessly pilfered from /sys/vax/in_cksum.c, with all the MBUF stuff
- * ripped out.
+ * in_cksum --
+ *     Checksum routine for Internet Protocol family headers (C Version)

  */
  */

-#if vax

 in_cksum(addr, len)
 in_cksum(addr, len)

-u_short *addr;
-int len;
+       u_short *addr;
+       int len;

 {
 {

-       register int nleft = len;       /* on vax, (user mode), r11 */
-       register int xxx;               /* on vax, (user mode), r10 */
-       register u_short *w = addr;     /* on vax, known to be r9 */
-       register int sum = 0;           /* on vax, known to be r8 */
-
+       register int nleft = len;
+       register u_short *w = addr;
+       register int sum = 0;
+       u_short answer = 0;

 
        /*
 
        /*

-        * Force to long boundary so we do longword aligned
-        * memory operations.  It is too hard to do byte
-        * adjustment, do only word adjustment.
+        * Our algorithm is simple, using a 32 bit accumulator (sum), we add
+        * sequential 16 bit words to it, and at the end, fold back all the
+        * carry bits from the top 16 bits into the lower 16 bits.

         */
         */

-       if (((int)w&0x2) && nleft >= 2) {
+       while (nleft > 1)  {

                sum += *w++;
                nleft -= 2;
        }
                sum += *w++;
                nleft -= 2;
        }

-       /*
-        * Do as much of the checksum as possible 32 bits at at time.
-        * In fact, this loop is unrolled to make overhead from
-        * branches &c small.
-        *
-        * We can do a 16 bit ones complement sum 32 bits at a time
-        * because the 32 bit register is acting as two 16 bit
-        * registers for adding, with carries from the low added
-        * into the high (by normal carry-chaining) and carries
-        * from the high carried into the low on the next word
-        * by use of the adwc instruction.  This lets us run
-        * this loop at almost memory speed.
-        *
-        * Here there is the danger of high order carry out, and
-        * we carefully use adwc.
-        */
-       while ((nleft -= 32) >= 0) {
-#undef ADD
-               asm("clrl r0");         /* clears carry */
-#define ADD            asm("adwc (r9)+,r8;");
-               ADD; ADD; ADD; ADD; ADD; ADD; ADD; ADD;
-               asm("adwc $0,r8");
-       }
-       nleft += 32;
-       while ((nleft -= 8) >= 0) {
-               asm("clrl r0");
-               ADD; ADD;
-               asm("adwc $0,r8");
-       }
-       nleft += 8;
-       /*
-        * Now eliminate the possibility of carry-out's by
-        * folding back to a 16 bit number (adding high and
-        * low parts together.)  Then mop up trailing words
-        * and maybe an odd byte.
-        */
-       { asm("ashl $-16,r8,r0; addw2 r0,r8");
-         asm("adwc $0,r8; movzwl r8,r8"); }
-       while ((nleft -= 2) >= 0) {
-               asm("movzwl (r9)+,r0; addl2 r0,r8");
-       }
-       if (nleft == -1) {
-               sum += *(u_char *)w;
+
+       /* mop up an odd byte, if necessary */
+       if (nleft == 1) {
+               *(u_char *)(&answer) = *(u_char *)w ;
+               sum += answer;

        }
 
        }
 

-       /*
-        * Add together high and low parts of sum
-        * and carry to get cksum.
-        * Have to be careful to not drop the last
-        * carry here.
-        */
-       { asm("ashl $-16,r8,r0; addw2 r0,r8; adwc $0,r8");
-         asm("mcoml r8,r8; movzwl r8,r8"); }
-       return (sum);
+       /* add back carry outs from top 16 bits to low 16 bits */
+       sum = (sum >> 16) + (sum & 0xffff);     /* add hi 16 to low 16 */
+       sum += (sum >> 16);                     /* add carry */
+       answer = ~sum;                          /* truncate to 16 bits */
+       return(answer);

 }
 }

-#endif vax

 
 /*
 
 /*

- *                     T V S U B
- * 
- * Subtract 2 timeval structs:  out = out - in.
- * 
- * Out is assumed to be >= in.
+ * tvsub --
+ *     Subtract 2 timeval structs:  out = out - in.  Out is assumed to
+ * be >= in.

  */
  */

-tvsub( out, in )
-register struct timeval *out, *in;
+tvsub(out, in)
+       register struct timeval *out, *in;

 {
 {

-       if( (out->tv_usec -= in->tv_usec) < 0 )   {
-               out->tv_sec--;
+       if ((out->tv_usec -= in->tv_usec) < 0) {
+               --out->tv_sec;

                out->tv_usec += 1000000;
        }
        out->tv_sec -= in->tv_sec;
 }
 
 /*
                out->tv_usec += 1000000;
        }
        out->tv_sec -= in->tv_sec;
 }
 
 /*

- *                     F I N I S H
- *
- * Print out statistics, and give up.
- * Heavily buffered STDIO is used here, so that all the statistics
- * will be written with 1 sys-write call.  This is nice when more
- * than one copy of the program is running on a terminal;  it prevents
- * the statistics output from becomming intermingled.
+ * finish --
+ *     Print out statistics, and give up.

  */
 finish()
 {
  */
 finish()
 {

-       printf("\n----%s PING Statistics----\n", hostname );
-       printf("%d packets transmitted, ", ntransmitted );
-       printf("%d packets received, ", nreceived );
+       (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 (ntransmitted)

-           printf("%d%% packet loss",
-               (int) (((ntransmitted-nreceived)*100) / ntransmitted ) );
-       printf("\n");
+               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)
        if (nreceived && timing)

-           printf("round-trip (ms)  min/avg/max = %d/%d/%d\n",
-               tmin,
-               tsum / nreceived,
-               tmax );
-       fflush(stdout);
+               (void)printf("round-trip min/avg/max = %ld/%lu/%ld ms\n",
+                   tmin, tsum / (nreceived + nrepeats), tmax);

        exit(0);
 }
        exit(0);
 }

+
+#ifdef notdef
+static char *ttab[] = {
+       "Echo Reply",           /* ip + seq + udata */
+       "Dest Unreachable",     /* net, host, proto, port, frag, sr + IP */
+       "Source Quench",        /* IP */
+       "Redirect",             /* redirect type, gateway, + IP  */
+       "Echo",
+       "Time Exceeded",        /* transit, frag reassem + IP */
+       "Parameter Problem",    /* pointer + IP */
+       "Timestamp",            /* id + seq + three timestamps */
+       "Timestamp Reply",      /* " */
+       "Info Request",         /* id + sq */
+       "Info Reply"            /* " */
+};
+#endif
+
+/*
+ * pr_icmph --
+ *     Print a descriptive string about an ICMP header.
+ */
+pr_icmph(icp)
+       struct icmp *icp;
+{
+       switch(icp->icmp_type) {
+       case ICMP_ECHOREPLY:
+               (void)printf("Echo Reply\n");
+               /* XXX ID + Seq + Data */
+               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;
+               }
+               /* Print returned IP header information */
+#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");
+               /* XXX ID + Seq + Data */
+               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");
+               /* XXX ID + Seq + 3 timestamps */
+               break;
+       case ICMP_TSTAMPREPLY:
+               (void)printf("Timestamp Reply\n");
+               /* XXX ID + Seq + 3 timestamps */
+               break;
+       case ICMP_IREQ:
+               (void)printf("Information Request\n");
+               /* XXX ID + Seq */
+               break;
+       case ICMP_IREQREPLY:
+               (void)printf("Information Reply\n");
+               /* XXX ID + Seq */
+               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 --
+ *     Print an IP header with options.
+ */
+pr_iph(ip)
+       struct ip *ip;
+{
+       int hlen;
+       u_char *cp;
+
+       hlen = ip->ip_hl << 2;
+       cp = (u_char *)ip + 20;         /* point to options */
+
+       (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));
+       /* dump and option bytes */
+       while (hlen-- > 20) {
+               (void)printf("%02x", *cp++);
+       }
+       (void)putchar('\n');
+}
+
+/*
+ * pr_addr --
+ *     Return an ascii host address as a dotted quad and optionally with
+ * a hostname.
+ */
+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 --
+ *     Dump some info on a returned (via ICMP) IP packet.
+ */
+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 + 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);
+}