--- trunk/reactos/apps/utils/net/tracert/tracrt.c 2005-01-12 20:28:59 UTC (rev 12993)
+++ trunk/reactos/apps/utils/net/tracert/tracert.c 2005-01-12 20:30:04 UTC (rev 12994)
@@ -0,0 +1,929 @@
+/*-
+ * Copyright (c) 1990, 1993
+ * The Regents of the University of California. All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Van Jacobson.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by the University of
+ * California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef lint
+static char copyright[] =
+"@(#) Copyright (c) 1990, 1993\n\
+ The Regents of the University of California. All rights reserved.\n";
+#endif /* not lint */
+
+#ifndef lint
+static char sccsid[] = "@(#)traceroute.c 8.1 (Berkeley) 6/6/93";
+#endif /* not lint */
+
+/*
+ * traceroute host - trace the route ip packets follow going to "host".
+ *
+ * Attempt to trace the route an ip packet would follow to some
+ * internet host. We find out intermediate hops by launching probe
+ * packets with a small ttl (time to live) then listening for an
+ * icmp "time exceeded" reply from a gateway. We start our probes
+ * with a ttl of one and increase by one until we get an icmp "port
+ * unreachable" (which means we got to "host") or hit a max (which
+ * defaults to 30 hops & can be changed with the -m flag). Three
+ * probes (change with -q flag) are sent at each ttl setting and a
+ * line is printed showing the ttl, address of the gateway and
+ * round trip time of each probe. If the probe answers come from
+ * different gateways, the address of each responding system will
+ * be printed. If there is no response within a 5 sec. timeout
+ * interval (changed with the -w flag), a "*" is printed for that
+ * probe.
+ *
+ * Probe packets are UDP format. We don't want the destination
+ * host to process them so the destination port is set to an
+ * unlikely value (if some clod on the destination is using that
+ * value, it can be changed with the -p flag).
+ *
+ * A sample use might be:
+ *
+ * [yak 71]% traceroute nis.nsf.net.
+ * traceroute to nis.nsf.net (35.1.1.48), 30 hops max, 56 byte packet
+ * 1 helios.ee.lbl.gov (128.3.112.1) 19 ms 19 ms 0 ms
+ * 2 lilac-dmc.Berkeley.EDU (128.32.216.1) 39 ms 39 ms 19 ms
+ * 3 lilac-dmc.Berkeley.EDU (128.32.216.1) 39 ms 39 ms 19 ms
+ * 4 ccngw-ner-cc.Berkeley.EDU (128.32.136.23) 39 ms 40 ms 39 ms
+ * 5 ccn-nerif22.Berkeley.EDU (128.32.168.22) 39 ms 39 ms 39 ms
+ * 6 128.32.197.4 (128.32.197.4) 40 ms 59 ms 59 ms
+ * 7 131.119.2.5 (131.119.2.5) 59 ms 59 ms 59 ms
+ * 8 129.140.70.13 (129.140.70.13) 99 ms 99 ms 80 ms
+ * 9 129.140.71.6 (129.140.71.6) 139 ms 239 ms 319 ms
+ * 10 129.140.81.7 (129.140.81.7) 220 ms 199 ms 199 ms
+ * 11 nic.merit.edu (35.1.1.48) 239 ms 239 ms 239 ms
+ *
+ * Note that lines 2 & 3 are the same. This is due to a buggy
+ * kernel on the 2nd hop system -- lbl-csam.arpa -- that forwards
+ * packets with a zero ttl.
+ *
+ * A more interesting example is:
+ *
+ * [yak 72]% traceroute allspice.lcs.mit.edu.
+ * traceroute to allspice.lcs.mit.edu (18.26.0.115), 30 hops max
+ * 1 helios.ee.lbl.gov (128.3.112.1) 0 ms 0 ms 0 ms
+ * 2 lilac-dmc.Berkeley.EDU (128.32.216.1) 19 ms 19 ms 19 ms
+ * 3 lilac-dmc.Berkeley.EDU (128.32.216.1) 39 ms 19 ms 19 ms
+ * 4 ccngw-ner-cc.Berkeley.EDU (128.32.136.23) 19 ms 39 ms 39 ms
+ * 5 ccn-nerif22.Berkeley.EDU (128.32.168.22) 20 ms 39 ms 39 ms
+ * 6 128.32.197.4 (128.32.197.4) 59 ms 119 ms 39 ms
+ * 7 131.119.2.5 (131.119.2.5) 59 ms 59 ms 39 ms
+ * 8 129.140.70.13 (129.140.70.13) 80 ms 79 ms 99 ms
+ * 9 129.140.71.6 (129.140.71.6) 139 ms 139 ms 159 ms
+ * 10 129.140.81.7 (129.140.81.7) 199 ms 180 ms 300 ms
+ * 11 129.140.72.17 (129.140.72.17) 300 ms 239 ms 239 ms
+ * 12 * * *
+ * 13 128.121.54.72 (128.121.54.72) 259 ms 499 ms 279 ms
+ * 14 * * *
+ * 15 * * *
+ * 16 * * *
+ * 17 * * *
+ * 18 ALLSPICE.LCS.MIT.EDU (18.26.0.115) 339 ms 279 ms 279 ms
+ *
+ * (I start to see why I'm having so much trouble with mail to
+ * MIT.) Note that the gateways 12, 14, 15, 16 & 17 hops away
+ * either don't send ICMP "time exceeded" messages or send them
+ * with a ttl too small to reach us. 14 - 17 are running the
+ * MIT C Gateway code that doesn't send "time exceeded"s. God
+ * only knows what's going on with 12.
+ *
+ * The silent gateway 12 in the above may be the result of a bug in
+ * the 4.[23]BSD network code (and its derivatives): 4.x (x <= 3)
+ * sends an unreachable message using whatever ttl remains in the
+ * original datagram. Since, for gateways, the remaining ttl is
+ * zero, the icmp "time exceeded" is guaranteed to not make it back
+ * to us. The behavior of this bug is slightly more interesting
+ * when it appears on the destination system:
+ *
+ * 1 helios.ee.lbl.gov (128.3.112.1) 0 ms 0 ms 0 ms
+ * 2 lilac-dmc.Berkeley.EDU (128.32.216.1) 39 ms 19 ms 39 ms
+ * 3 lilac-dmc.Berkeley.EDU (128.32.216.1) 19 ms 39 ms 19 ms
+ * 4 ccngw-ner-cc.Berkeley.EDU (128.32.136.23) 39 ms 40 ms 19 ms
+ * 5 ccn-nerif35.Berkeley.EDU (128.32.168.35) 39 ms 39 ms 39 ms
+ * 6 csgw.Berkeley.EDU (128.32.133.254) 39 ms 59 ms 39 ms
+ * 7 * * *
+ * 8 * * *
+ * 9 * * *
+ * 10 * * *
+ * 11 * * *
+ * 12 * * *
+ * 13 rip.Berkeley.EDU (128.32.131.22) 59 ms ! 39 ms ! 39 ms !
+ *
+ * Notice that there are 12 "gateways" (13 is the final
+ * destination) and exactly the last half of them are "missing".
+ * What's really happening is that rip (a Sun-3 running Sun OS3.5)
+ * is using the ttl from our arriving datagram as the ttl in its
+ * icmp reply. So, the reply will time out on the return path
+ * (with no notice sent to anyone since icmp's aren't sent for
+ * icmp's) until we probe with a ttl that's at least twice the path
+ * length. I.e., rip is really only 7 hops away. A reply that
+ * returns with a ttl of 1 is a clue this problem exists.
+ * Traceroute prints a "!" after the time if the ttl is <= 1.
+ * Since vendors ship a lot of obsolete (DEC's Ultrix, Sun 3.x) or
+ * non-standard (HPUX) software, expect to see this problem
+ * frequently and/or take care picking the target host of your
+ * probes.
+ *
+ * Other possible annotations after the time are !H, !N, !P (got a host,
+ * network or protocol unreachable, respectively), !S or !F (source
+ * route failed or fragmentation needed -- neither of these should
+ * ever occur and the associated gateway is busted if you see one). If
+ * almost all the probes result in some kind of unreachable, traceroute
+ * will give up and exit.
+ *
+ * Notes
+ * -----
+ * This program must be run by root or be setuid. (I suggest that
+ * you *don't* make it setuid -- casual use could result in a lot
+ * of unnecessary traffic on our poor, congested nets.)
+ *
+ * This program requires a kernel mod that does not appear in any
+ * system available from Berkeley: A raw ip socket using proto
+ * IPPROTO_RAW must interpret the data sent as an ip datagram (as
+ * opposed to data to be wrapped in a ip datagram). See the README
+ * file that came with the source to this program for a description
+ * of the mods I made to /sys/netinet/raw_ip.c. Your mileage may
+ * vary. But, again, ANY 4.x (x < 4) BSD KERNEL WILL HAVE TO BE
+ * MODIFIED TO RUN THIS PROGRAM.
+ *
+ * The udp port usage may appear bizarre (well, ok, it is bizarre).
+ * The problem is that an icmp message only contains 8 bytes of
+ * data from the original datagram. 8 bytes is the size of a udp
+ * header so, if we want to associate replies with the original
+ * datagram, the necessary information must be encoded into the
+ * udp header (the ip id could be used but there's no way to
+ * interlock with the kernel's assignment of ip id's and, anyway,
+ * it would have taken a lot more kernel hacking to allow this
+ * code to set the ip id). So, to allow two or more users to
+ * use traceroute simultaneously, we use this task's pid as the
+ * source port (the high bit is set to move the port number out
+ * of the "likely" range). To keep track of which probe is being
+ * replied to (so times and/or hop counts don't get confused by a
+ * reply that was delayed in transit), we increment the destination
+ * port number before each probe.
+ *
+ * Don't use this as a coding example. I was trying to find a
+ * routing problem and this code sort-of popped out after 48 hours
+ * without sleep. I was amazed it ever compiled, much less ran.
+ *
+ * I stole the idea for this program from Steve Deering. Since
+ * the first release, I've learned that had I attended the right
+ * IETF working group meetings, I also could have stolen it from Guy
+ * Almes or Matt Mathis. I don't know (or care) who came up with
+ * the idea first. I envy the originators' perspicacity and I'm
+ * glad they didn't keep the idea a secret.
+ *
+ * Tim Seaver, Ken Adelman and C. Philip Wood provided bug fixes and/or
+ * enhancements to the original distribution.
+ *
+ * I've hacked up a round-trip-route version of this that works by
+ * sending a loose-source-routed udp datagram through the destination
+ * back to yourself. Unfortunately, SO many gateways botch source
+ * routing, the thing is almost worthless. Maybe one day...
+ *
+ * -- Van Jacobson (van@helios.ee.lbl.gov)
+ * Tue Dec 20 03:50:13 PST 1988
+ */
+
+#define caddr_t void *
+
+#include <stdio.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <winsock2.h>
+
+
+#include <stdio.h>
+#include <time.h>
+#include <winsock.h>
+
+//void print(buf, cc, from);
+char * inetname(in);
+double deltaT(t1p, t2p);
+void usage();
+void send_probe(seq, ttl);
+
+#define bzero( ptr, count ) memset( ptr, 0, count )
+#define bcopy(src,dest,len) memcpy(dest,src,len)
+
+// setlinebuf is equivalent to the setvbuf call below.
+inline int setlinebuf(FILE *stream)
+{
+ return setvbuf( stream, (char*)0, _IONBF, 0 );
+}
+
+#ifndef __GNUC__
+#define EPOCHFILETIME (116444736000000000i64)
+#else
+#define EPOCHFILETIME (116444736000000000LL)
+#endif
+
+struct timezone {
+ int tz_minuteswest; /* minutes W of Greenwich */
+ int tz_dsttime; /* type of dst correction */
+};
+
+int gettimeofday(struct timeval *tv, struct timezone *tz)
+{
+ FILETIME ft;
+ LARGE_INTEGER li;
+ __int64 t;
+ static int tzflag;
+
+ if (tv)
+ {
+ GetSystemTimeAsFileTime(&ft);
+ //li.LowPart = ft.dwLowDateTime;
+ //li.HighPart = ft.dwHighDateTime;
+ t = li.QuadPart; /* In 100-nanosecond intervals */
+ t -= EPOCHFILETIME; /* Offset to the Epoch time */
+ t /= 10; /* In microseconds */
+ tv->tv_sec = (long)(t / 1000000);
+ tv->tv_usec = (long)(t % 1000000);
+ }
+
+ if (tz)
+ {
+ if (!tzflag)
+ {
+ _tzset();
+ tzflag++;
+ }
+ tz->tz_minuteswest = _timezone / 60;
+ tz->tz_dsttime = _daylight;
+ }
+
+ return 0;
+}
+
+
+
+/* Set up endiannes macros for the ip and ip_icmp BSD headers */
+#ifndef BIG_ENDIAN
+#define BIG_ENDIAN 4321
+#endif
+#ifndef LITTLE_ENDIAN
+#define LITTLE_ENDIAN 1234
+#endif
+#ifndef BYTE_ORDER
+#ifdef WORDS_BIGENDIAN
+#define BYTE_ORDER BIG_ENDIAN
+#else
+#define BYTE_ORDER LITTLE_ENDIAN
+#endif
+#endif /* BYTE_ORDER */
+
+#define u_int16_t WORD
+#define u_int32_t DWORD
+
+/* These are BSD headers. We use these here because they are needed on
+ * libc5 Linux systems. On other platforms they are usually simply more
+ * complete than the native stuff, and cause less portability problems
+ * so we use them anyway.
+ */
+#include "ip.h"
+#include "ip_icmp.h"
+
+
+#define MAXPACKET 65535 /* max ip packet size */
+#ifndef MAXHOSTNAMELEN
+#define MAXHOSTNAMELEN 64
+#endif
+
+#ifndef FD_SET
+#define NFDBITS (8*sizeof(fd_set))
+#define FD_SETSIZE NFDBITS
+#define FD_SET(n, p) ((p)->fds_bits[(n)/NFDBITS] |= (1 << ((n) % NFDBITS)))
+#define FD_CLR(n, p) ((p)->fds_bits[(n)/NFDBITS] &= ~(1 << ((n) % NFDBITS)))
+#define FD_ISSET(n, p) ((p)->fds_bits[(n)/NFDBITS] & (1 << ((n) % NFDBITS)))
+#define FD_ZERO(p) bzero((char *)(p), sizeof(*(p)))
+#endif
+
+#define Fprintf (void)fprintf
+#define Sprintf (void)sprintf
+#define Printf (void)printf
+
+// Define the UDP header
+//
+typedef struct udp_hdr
+{
+ unsigned short src_portno; // Source port number
+ unsigned short dst_portno; // Destination port number
+ unsigned short udp_length; // UDP packet length
+ unsigned short udp_checksum; // UDP checksum (optional)
+} UDP_HDR, *PUDP_HDR;
+
+/*
+ * format of a (udp) probe packet.
+ */
+struct opacket {
+ struct ip ip;
+ UDP_HDR udp;
+ u_char seq; /* sequence number of this packet */
+ u_char ttl; /* ttl packet left with */
+ struct timeval tv; /* time packet left */
+};
+
+u_char packet[512]; /* last inbound (icmp) packet */
+struct opacket *outpacket; /* last output (udp) packet */
+
+#if 0
+int wait_for_reply __P((int, struct sockaddr_in *));
+void send_probe __P((int, int));
+double deltaT __P((struct timeval *, struct timeval *));
+int packet_ok __P((u_char *, int, struct sockaddr_in *, int));
+//void print __P((u_char *, int, struct sockaddr_in *));
+void tvsub __P((struct timeval *, struct timeval *));
+char *inetname __P((struct in_addr));
+void usage __P(());
+#endif
+
+int s; /* receive (icmp) socket file descriptor */
+int sndsock; /* send (udp) socket file descriptor */
+struct timezone tz; /* leftover */
+
+struct sockaddr whereto; /* Who to try to reach */
+int datalen; /* How much data */
+
+char *source = 0;
+char *hostname;
+
+int nprobes = 3;
+int max_ttl = 30;
+u_short ident;
+u_short port = 32768+666; /* start udp dest port # for probe packets */
+int options; /* socket options */
+int verbose;
+int waittime = 5; /* time to wait for response (in seconds) */
+int nflag; /* print addresses numerically */
+
+void
+print(buf, cc, from)
+ u_char *buf;
+ int cc;
+ struct sockaddr_in *from;
+{
+ struct ip *ip;
+ int hlen;
+
+ ip = (struct ip *) buf;
+ hlen = ip->ip_hl << 2;
+ cc -= hlen;
+
+ if (nflag)
+ Printf(" %s", inet_ntoa(from->sin_addr));
+ else
+ Printf(" %s (%s)", inetname(from->sin_addr),
+ inet_ntoa(from->sin_addr));
+
+ if (verbose)
+ Printf (" %d bytes to %s", cc, inet_ntoa (ip->ip_dst));
+}
+
+
+int
+main(argc, argv)
+ int argc;
+ char *argv[];
+{
+ extern char *optarg;
+ extern int optind;
+ struct hostent *hp;
+ struct protoent *pe;
+ struct sockaddr_in from, *to;
+ int ch, i, on, probe, seq, tos, ttl;
+
+ on = 1;
+ seq = tos = 0;
+ to = (struct sockaddr_in *)&whereto;
+ while ((ch = getopt(argc, argv, "dm:np:q:rs:t:w:v")) != EOF)
+ switch(ch) {
+ case 'd':
+ options |= SO_DEBUG;
+ break;
+ case 'm':
+ max_ttl = atoi(optarg);
+ if (max_ttl <= 1) {
+ Fprintf(stderr,
+ "traceroute: max ttl must be >1.\n");
+ exit(1);
+ }
+ break;
+ case 'n':
+ nflag++;
+ break;
+ case 'p':
+ port = atoi(optarg);
+ if (port < 1) {
+ Fprintf(stderr,
+ "traceroute: port must be >0.\n");
+ exit(1);
+ }
+ break;
+ case 'q':
+ nprobes = atoi(optarg);
+ if (nprobes < 1) {
+ Fprintf(stderr,
+ "traceroute: nprobes must be >0.\n");
+ exit(1);
+ }
+ break;
+ case 'r':
+ options |= SO_DONTROUTE;
+ break;
+ case 's':
+ /*
+ * set the ip source address of the outbound
+ * probe (e.g., on a multi-homed host).
+ */
+ source = optarg;
+ break;
+ case 't':
+ tos = atoi(optarg);
+ if (tos < 0 || tos > 255) {
+ Fprintf(stderr,
+ "traceroute: tos must be 0 to 255.\n");
+ exit(1);
+ }
+ break;
+ case 'v':
+ verbose++;
+ break;
+ case 'w':
+ waittime = atoi(optarg);
+ if (waittime <= 1) {
+ Fprintf(stderr,
+ "traceroute: wait must be >1 sec.\n");
+ exit(1);
+ }
+ break;
+ default:
+ usage();
+ }
+ argc -= optind;
+ argv += optind;
+
+ if (argc < 1)
+ usage();
+
+ setlinebuf (stdout);
+
+ (void) bzero((char *)&whereto, sizeof(struct sockaddr));
+ to->sin_family = AF_INET;
+ to->sin_addr.s_addr = inet_addr(*argv);
+ if (to->sin_addr.s_addr != -1)
+ hostname = *argv;
+ else {
+ hp = gethostbyname(*argv);
+ if (hp) {
+ to->sin_family = hp->h_addrtype;
+ bcopy(hp->h_addr, (caddr_t)&to->sin_addr, hp->h_length);
+ hostname = hp->h_name;
+ } else {
+ (void)fprintf(stderr,
+ "traceroute: unknown host %s\n", *argv);
+ exit(1);
+ }
+ }
+ if (*++argv)
+ datalen = atoi(*argv);
+ if (datalen < 0 || datalen >= MAXPACKET - sizeof(struct opacket)) {
+ Fprintf(stderr,
+ "traceroute: packet size must be 0 <= s < %ld.\n",
+ MAXPACKET - sizeof(struct opacket));
+ exit(1);
+ }
+ datalen += sizeof(struct opacket);
+ outpacket = (struct opacket *)malloc((unsigned)datalen);
+ if (! outpacket) {
+ perror("traceroute: malloc");
+ exit(1);
+ }
+ (void) bzero((char *)outpacket, datalen);
+ outpacket->ip.ip_dst = to->sin_addr;
+ outpacket->ip.ip_tos = tos;
+ outpacket->ip.ip_v = IPVERSION;
+ outpacket->ip.ip_id = 0;
+
+ ident = (getpid() & 0xffff) | 0x8000;
+
+ if ((pe = getprotobyname("icmp")) == NULL) {
+ Fprintf(stderr, "icmp: unknown protocol\n");
+ exit(10);
+ }
+ if ((s = socket(AF_INET, SOCK_RAW, pe->p_proto)) < 0) {
+ perror("traceroute: icmp socket");
+ exit(5);
+ }
+ if (options & SO_DEBUG)
+ (void) setsockopt(s, SOL_SOCKET, SO_DEBUG,
+ (char *)&on, sizeof(on));
+ if (options & SO_DONTROUTE)
+ (void) setsockopt(s, SOL_SOCKET, SO_DONTROUTE,
+ (char *)&on, sizeof(on));
+
+ if ((sndsock = socket(AF_INET, SOCK_RAW, IPPROTO_RAW)) < 0) {
+ perror("traceroute: raw socket");
+ exit(5);
+ }
+#ifdef SO_SNDBUF
+ if (setsockopt(sndsock, SOL_SOCKET, SO_SNDBUF, (char *)&datalen,
+ sizeof(datalen)) < 0) {
+ perror("traceroute: SO_SNDBUF");
+ exit(6);
+ }
+#endif /* SO_SNDBUF */
+#ifdef IP_HDRINCL
+ if (setsockopt(sndsock, IPPROTO_IP, IP_HDRINCL, (char *)&on,
+ sizeof(on)) < 0) {
+ perror("traceroute: IP_HDRINCL");
+ exit(6);
+ }
+#endif /* IP_HDRINCL */
+ if (options & SO_DEBUG)
+ (void) setsockopt(sndsock, SOL_SOCKET, SO_DEBUG,
+ (char *)&on, sizeof(on));
+ if (options & SO_DONTROUTE)
+ (void) setsockopt(sndsock, SOL_SOCKET, SO_DONTROUTE,
+ (char *)&on, sizeof(on));
+
+ if (source) {
+ (void) bzero((char *)&from, sizeof(struct sockaddr));
+ from.sin_family = AF_INET;
+ from.sin_addr.s_addr = inet_addr(source);
+ if (from.sin_addr.s_addr == -1) {
+ Printf("traceroute: unknown host %s\n", source);
+ exit(1);
+ }
+ outpacket->ip.ip_src = from.sin_addr;
+#ifndef IP_HDRINCL
+ if (bind(sndsock, (struct sockaddr *)&from, sizeof(from)) < 0) {
+ perror ("traceroute: bind:");
+ exit (1);
+ }
+#endif /* IP_HDRINCL */
+ }
+
+ Fprintf(stderr, "traceroute to %s (%s)", hostname,
+ inet_ntoa(to->sin_addr));
+ if (source)
+ Fprintf(stderr, " from %s", source);
+ Fprintf(stderr, ", %d hops max, %d byte packets\n", max_ttl, datalen);
+ (void) fflush(stderr);
+
+ for (ttl = 1; ttl <= max_ttl; ++ttl) {
+ u_long lastaddr = 0;
+ int got_there = 0;
+ int unreachable = 0;
+
+ Printf("%2d ", ttl);
+ for (probe = 0; probe < nprobes; ++probe) {
+ int cc;
+ struct timeval t1, t2;
+ struct timezone tz;
+ struct ip *ip;
+
+ (void) gettimeofday(&t1, &tz);
+ send_probe(++seq, ttl);
+ while (cc = wait_for_reply(s, &from)) {
+ (void) gettimeofday(&t2, &tz);
+ if ((i = packet_ok(packet, cc, &from, seq))) {
+ if (from.sin_addr.s_addr != lastaddr) {
+ print(packet, cc, &from);
+ lastaddr = from.sin_addr.s_addr;
+ }
+ Printf(" %g ms", deltaT(&t1, &t2));
+ switch(i - 1) {
+ case ICMP_UNREACH_PORT:
+#ifndef ARCHAIC
+ ip = (struct ip *)packet;
+ if (ip->ip_ttl <= 1)
+ Printf(" !");
+#endif /* ARCHAIC */
+ ++got_there;
+ break;
+ case ICMP_UNREACH_NET:
+ ++unreachable;
+ Printf(" !N");
+ break;
+ case ICMP_UNREACH_HOST:
+ ++unreachable;
+ Printf(" !H");
+ break;
+ case ICMP_UNREACH_PROTOCOL:
+ ++got_there;
+ Printf(" !P");
+ break;
+ case ICMP_UNREACH_NEEDFRAG:
+ ++unreachable;
+ Printf(" !F");
+ break;
+ case ICMP_UNREACH_SRCFAIL:
+ ++unreachable;
+ Printf(" !S");
+ break;
+ }
+ break;
+ }
+ }
+ if (cc == 0)
+ Printf(" *");
+ (void) fflush(stdout);
+ }
+ putchar('\n');
+ if (got_there || unreachable >= nprobes-1)
+ exit(0);
+ }
+}
+
+int
+wait_for_reply(sock, from)
+ int sock;
+ struct sockaddr_in *from;
+{
+ fd_set fds;
+ struct timeval wait;
+ int cc = 0;
+ int fromlen = sizeof (*from);
+
+ FD_ZERO(&fds);
+ FD_SET(sock, &fds);
+ wait.tv_sec = waittime; wait.tv_usec = 0;
+
+ if (select(sock+1, &fds, (fd_set *)0, (fd_set *)0, &wait) > 0)
+ cc=recvfrom(s, (char *)packet, sizeof(packet), 0,
+ (struct sockaddr *)from, &fromlen);
+
+ return(cc);
+}
+
+
+void
+send_probe(seq, ttl)
+ int seq, ttl;
+{
+ struct opacket *op = outpacket;
+ struct ip *ip = &op->ip;
+ struct udphdr *up = &op->udp;
+ int i;
+
+ ip->ip_off = 0;
+ ip->ip_hl = sizeof(*ip) >> 2;
+ ip->ip_p = IPPROTO_UDP;
+ ip->ip_len = datalen;
+ ip->ip_ttl = ttl;
+ ip->ip_v = IPVERSION;
+ ip->ip_id = htons(ident+seq);
+
+// up->uh_sport = htons(ident);
+// up->uh_dport = htons(port+seq);
+// up->uh_ulen = htons((u_short)(datalen - sizeof(struct ip)));
+// up->uh_sum = 0;
+
+ op->seq = seq;
+ op->ttl = ttl;
+ (void) gettimeofday(&op->tv, &tz);
+
+ i = sendto(sndsock, (char *)outpacket, datalen, 0, &whereto,
+ sizeof(struct sockaddr));
+ if (i < 0 || i != datalen) {
+ if (i<0)
+ perror("sendto");
+ Printf("traceroute: wrote %s %d chars, ret=%d\n", hostname,
+ datalen, i);
+ (void) fflush(stdout);
+ }
+}
+
+
+double
+deltaT(t1p, t2p)
+ struct timeval *t1p, *t2p;
+{
+ register double dt;
+
+ dt = (double)(t2p->tv_sec - t1p->tv_sec) * 1000.0 +
+ (double)(t2p->tv_usec - t1p->tv_usec) / 1000.0;
+ return (dt);
+}
+
+
+/*
+ * Convert an ICMP "type" field to a printable string.
+ */
+char *
+pr_type(t)
+ u_char t;
+{
+ static char *ttab[] = {
+ "Echo Reply", "ICMP 1", "ICMP 2", "Dest Unreachable",
+ "Source Quench", "Redirect", "ICMP 6", "ICMP 7",
+ "Echo", "ICMP 9", "ICMP 10", "Time Exceeded",
+ "Param Problem", "Timestamp", "Timestamp Reply", "Info Request",
+ "Info Reply"
+ };
+
+ if(t > 16)
+ return("OUT-OF-RANGE");
+
+ return(ttab[t]);
+}
+
+
+int
+packet_ok(buf, cc, from, seq)
+ u_char *buf;
+ int cc;
+ struct sockaddr_in *from;
+ int seq;
+{
+ register struct icmp *icp;
+ u_char type, code;
+ int hlen;
+#ifndef ARCHAIC
+ struct ip *ip;
+
+ ip = (struct ip *) buf;
+ hlen = ip->ip_hl << 2;
+ if (cc < hlen + ICMP_MINLEN) {
+ if (verbose)
+ Printf("packet too short (%d bytes) from %s\n", cc,
+ inet_ntoa(from->sin_addr));
+ return (0);
+ }
+ cc -= hlen;
+ icp = (struct icmp *)(buf + hlen);
+#else
+ icp = (struct icmp *)buf;
+#endif /* ARCHAIC */
+ type = icp->icmp_type; code = icp->icmp_code;
+ if ((type == ICMP_TIMXCEED && code == ICMP_TIMXCEED_INTRANS) ||
+ type == ICMP_UNREACH) {
+ struct ip *hip;
+ struct udphdr *up;
+
+ hip = &icp->icmp_ip;
+ hlen = hip->ip_hl << 2;
+ up = (struct udphdr *)((u_char *)hip + hlen);
+// if (hlen + 12 <= cc && hip->ip_p == IPPROTO_UDP &&
+// up->uh_sport == htons(ident) &&
+// up->uh_dport == htons(port+seq))
+ if (hlen + 12 <= cc && hip->ip_p == IPPROTO_UDP)
+ return (type == ICMP_TIMXCEED? -1 : code+1);
+ }
+#ifndef ARCHAIC
+ if (verbose) {
+ int i;
+ u_long *lp = (u_long *)&icp->icmp_ip;
+
+ Printf("\n%d bytes from %s to %s", cc,
+ inet_ntoa(from->sin_addr), inet_ntoa(ip->ip_dst));
+ Printf(": icmp type %d (%s) code %d\n", type, pr_type(type),
+ icp->icmp_code);
+ for (i = 4; i < cc ; i += sizeof(long))
+ Printf("%2d: x%8.8lx\n", i, *lp++);
+ }
+#endif /* ARCHAIC */
+ return(0);
+}
+
+#ifdef notyet
+/*
+ * Checksum routine for Internet Protocol family headers (C Version)
+ */
+u_short
+in_cksum(addr, len)
+ u_short *addr;
+ int len;
+{
+ register int nleft = len;
+ register u_short *w = addr;
+ register u_short answer;
+ register int sum = 0;
+
+ /*
+ * 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.
+ */
+ while (nleft > 1) {
+ sum += *w++;
+ nleft -= 2;
+ }
+
+ /* mop up an odd byte, if necessary */
+ if (nleft == 1)
+ sum += *(u_char *)w;
+
+ /*
+ * 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 /* notyet */
+
+/*
+ * Subtract 2 timeval structs: out = out - in.
+ * Out is assumed to be >= in.
+ */
+void
+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;
+}
+
+
+/*
+ * Construct an Internet address representation.
+ * If the nflag has been supplied, give
+ * numeric value, otherwise try for symbolic name.
+ */
+char *
+inetname(in)
+ struct in_addr in;
+{
+ register char *cp;
+ static char line[50];
+ struct hostent *hp;
+ static char domain[MAXHOSTNAMELEN + 1];
+ static int first = 1;
+
+ if (first && !nflag) {
+ first = 0;
+ if (gethostname(domain, MAXHOSTNAMELEN) == 0 &&
+ (cp = strrchr(domain, '.')))
+ (void) strcpy(domain, cp + 1);
+ else
+ domain[0] = 0;
+ }
+ cp = 0;
+ if (!nflag && in.s_addr != INADDR_ANY) {
+ hp = gethostbyaddr((char *)&in, sizeof (in), AF_INET);
+ if (hp) {
+ if ((cp = strrchr(hp->h_name, '.')) &&
+ !strcmp(cp + 1, domain))
+ *cp = 0;
+ cp = hp->h_name;
+ }
+ }
+ if (cp)
+ (void) strcpy(line, cp);
+ else {
+ in.s_addr = ntohl(in.s_addr);
+#define C(x) ((x) & 0xff)
+ Sprintf(line, "%lu.%lu.%lu.%lu", C(in.s_addr >> 24),
+ C(in.s_addr >> 16), C(in.s_addr >> 8), C(in.s_addr));
+ }
+ return (line);
+}
+
+void
+usage()
+{
+ (void)fprintf(stderr,
+"usage: traceroute [-dnrv] [-m max_ttl] [-p port#] [-q nqueries]\n\t\
+[-s src_addr] [-t tos] [-w wait] host [data size]\n");
+ exit(1);
+}