diff --git a/usr.sbin/traceroute/as.c b/usr.sbin/traceroute/as.c index 7fb952ed3da1..512f1dd6f14c 100644 --- a/usr.sbin/traceroute/as.c +++ b/usr.sbin/traceroute/as.c @@ -1,221 +1,237 @@ /* $NetBSD: as.c,v 1.1 2001/11/04 23:14:36 atatat Exp $ */ /* * Copyright (c) 2001 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Andrew Brown. * * 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. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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. */ #include #include #include #include #include #include #include #include #include #include #include #include #include "as.h" #define DEFAULT_AS_SERVER "whois.radb.net" #undef AS_DEBUG_FILE struct aslookup { FILE *as_f; #ifdef AS_DEBUG_FILE FILE *as_debug; #endif /* AS_DEBUG_FILE */ }; void * as_setup(const char *server) { struct aslookup *asn; struct addrinfo hints, *res0, *res; FILE *f; int s, error; s = -1; if (server == NULL) server = getenv("RA_SERVER"); if (server == NULL) server = DEFAULT_AS_SERVER; memset(&hints, 0, sizeof(hints)); hints.ai_family = PF_UNSPEC; hints.ai_socktype = SOCK_STREAM; error = getaddrinfo(server, "whois", &hints, &res0); if (error == EAI_SERVICE) { warnx("warning: whois/tcp service not found"); error = getaddrinfo(server, "43", &hints, &res0); } if (error != 0) { warnx("%s: %s", server, gai_strerror(error)); return (NULL); } for (res = res0; res; res = res->ai_next) { s = socket(res->ai_family, res->ai_socktype, res->ai_protocol); if (s < 0) continue; if (connect(s, res->ai_addr, res->ai_addrlen) >= 0) break; close(s); s = -1; } freeaddrinfo(res0); if (s < 0) { warn("connect"); return (NULL); } f = fdopen(s, "r+"); (void)fprintf(f, "!!\n"); (void)fflush(f); asn = malloc(sizeof(struct aslookup)); if (asn == NULL) (void)fclose(f); else asn->as_f = f; #ifdef AS_DEBUG_FILE asn->as_debug = fopen(AS_DEBUG_FILE, "w"); if (asn->as_debug) { (void)fprintf(asn->as_debug, ">> !!\n"); (void)fflush(asn->as_debug); } #endif /* AS_DEBUG_FILE */ return (asn); } unsigned int -as_lookup(void *_asn, char *addr, sa_family_t family) +as_lookup(void *_asn, char *addr, sa_family_t family, int *status) { struct aslookup *asn = _asn; char buf[1024]; unsigned int as; int rc, dlen, plen; as = 0; rc = dlen = 0; plen = (family == AF_INET6) ? 128 : 32; - (void)fprintf(asn->as_f, "!r%s/%d,l\n", addr, plen); - (void)fflush(asn->as_f); + *status = fprintf(asn->as_f, "!r%s/%d,l\n", addr, plen); + if (*status < 0) { + *status = errno; + return 0; + } + *status = fflush(asn->as_f); + if (*status == EOF) { + *status = errno; + return 0; + } + *status = 0; #ifdef AS_DEBUG_FILE if (asn->as_debug) { (void)fprintf(asn->as_debug, ">> !r%s/%d,l\n", addr, plen); (void)fflush(asn->as_debug); } #endif /* AS_DEBUG_FILE */ - while (fgets(buf, sizeof(buf), asn->as_f) != NULL) { + while (1) { + if (fgets(buf, sizeof(buf), asn->as_f) == NULL) { + if(feof(asn->as_f) || ferror(asn->as_f)) { + *status = EIO; + return 0; + } + break; + } buf[sizeof(buf) - 1] = '\0'; #ifdef AS_DEBUG_FILE if (asn->as_debug) { (void)fprintf(asn->as_debug, "<< %s", buf); (void)fflush(asn->as_debug); } #endif /* AS_DEBUG_FILE */ if (rc == 0) { rc = buf[0]; switch (rc) { case 'A': /* A - followed by # bytes of answer */ sscanf(buf, "A%d\n", &dlen); #ifdef AS_DEBUG_FILE if (asn->as_debug) { (void)fprintf(asn->as_debug, "dlen: %d\n", dlen); (void)fflush(asn->as_debug); } #endif /* AS_DEBUG_FILE */ break; case 'C': case 'D': case 'E': case 'F': /* C - no data returned */ /* D - key not found */ /* E - multiple copies of key */ /* F - some other error */ break; } if (rc == 'A') /* skip to next input line */ continue; } if (dlen == 0) /* out of data, next char read is end code */ rc = buf[0]; if (rc != 'A') /* either an error off the bat, or a done code */ break; /* data received, thank you */ dlen -= strlen(buf); /* origin line is the interesting bit */ if (as == 0 && strncasecmp(buf, "origin:", 7) == 0) { sscanf(buf + 7, " AS%u", &as); #ifdef AS_DEBUG_FILE if (asn->as_debug) { (void)fprintf(asn->as_debug, "as: %d\n", as); (void)fflush(asn->as_debug); } #endif /* AS_DEBUG_FILE */ } } return (as); } void as_shutdown(void *_asn) { struct aslookup *asn = _asn; (void)fprintf(asn->as_f, "!q\n"); (void)fclose(asn->as_f); #ifdef AS_DEBUG_FILE if (asn->as_debug) { (void)fprintf(asn->as_debug, ">> !q\n"); (void)fclose(asn->as_debug); } #endif /* AS_DEBUG_FILE */ free(asn); } diff --git a/usr.sbin/traceroute/as.h b/usr.sbin/traceroute/as.h index f5a5dae2acec..ac61bbab4786 100644 --- a/usr.sbin/traceroute/as.h +++ b/usr.sbin/traceroute/as.h @@ -1,34 +1,34 @@ /* $NetBSD: as.h,v 1.1 2001/11/04 23:14:36 atatat Exp $ */ /* * Copyright (c) 2001 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Andrew Brown. * * 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. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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. */ void *as_setup(const char *); -unsigned int as_lookup(void *, char *, sa_family_t); +unsigned int as_lookup(void *, char *, sa_family_t, int *); void as_shutdown(void *); diff --git a/usr.sbin/traceroute/traceroute.c b/usr.sbin/traceroute/traceroute.c index 1297d3402ebd..be14c40b8d7b 100644 --- a/usr.sbin/traceroute/traceroute.c +++ b/usr.sbin/traceroute/traceroute.c @@ -1,2078 +1,2095 @@ /* * Copyright (c) 1988, 1989, 1991, 1994, 1995, 1996, 1997, 1998, 1999, 2000 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that: (1) source code distributions * retain the above copyright notice and this paragraph in its entirety, (2) * distributions including binary code include the above copyright notice and * this paragraph in its entirety in the documentation or other materials * provided with the distribution, and (3) all advertising materials mentioning * features or use of this software display the following acknowledgement: * ``This product includes software developed by the University of California, * Lawrence Berkeley Laboratory and its contributors.'' 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 ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. */ /* * 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 net.inet.ip.ttl 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), 64 hops max, 40 byte packets * 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), 64 hops max, 40 byte packets * 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 an 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@ee.lbl.gov) * Tue Dec 20 03:50:13 PST 1988 */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef WITH_CASPER #include #include #endif #ifdef IPSEC #include #include /* XXX */ #endif /* IPSEC */ #include #include #include #include #include #include #include #include #include #include #include #include /* rfc1716 */ #ifndef ICMP_UNREACH_FILTER_PROHIB #define ICMP_UNREACH_FILTER_PROHIB 13 /* admin prohibited filter */ #endif #ifndef ICMP_UNREACH_HOST_PRECEDENCE #define ICMP_UNREACH_HOST_PRECEDENCE 14 /* host precedence violation */ #endif #ifndef ICMP_UNREACH_PRECEDENCE_CUTOFF #define ICMP_UNREACH_PRECEDENCE_CUTOFF 15 /* precedence cutoff */ #endif #include "findsaddr.h" #include "ifaddrlist.h" #include "as.h" #include "traceroute.h" /* Maximum number of gateways (include room for one noop) */ #define NGATEWAYS ((int)((MAX_IPOPTLEN - IPOPT_MINOFF - 1) / sizeof(u_int32_t))) #ifndef MAXHOSTNAMELEN #define MAXHOSTNAMELEN 64 #endif #define Fprintf (void)fprintf #define Printf (void)printf /* What a GRE packet header looks like */ struct grehdr { u_int16_t flags; u_int16_t proto; u_int16_t length; /* PPTP version of these fields */ u_int16_t callId; }; #ifndef IPPROTO_GRE #define IPPROTO_GRE 47 #endif /* For GRE, we prepare what looks like a PPTP packet */ #define GRE_PPTP_PROTO 0x880b /* Host name and address list */ struct hostinfo { char *name; int n; u_int32_t *addrs; }; /* Data section of the probe packet */ struct outdata { 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 ip *outip; /* last output ip packet */ u_char *outp; /* last output inner protocol packet */ struct ip *hip = NULL; /* Quoted IP header */ int hiplen = 0; /* loose source route gateway list (including room for final destination) */ u_int32_t gwlist[NGATEWAYS + 1]; int s; /* receive (icmp) socket file descriptor */ int sndsock; /* send (udp) socket file descriptor */ struct sockaddr whereto; /* Who to try to reach */ struct sockaddr wherefrom; /* Who we are */ int packlen; /* total length of packet */ int protlen; /* length of protocol part of packet */ int minpacket; /* min ip packet size */ int maxpacket = 32 * 1024; /* max ip packet size */ int pmtu; /* Path MTU Discovery (RFC1191) */ u_int pausemsecs; char *prog; char *source; char *hostname; char *device; static const char devnull[] = "/dev/null"; int nprobes = -1; int max_ttl; int first_ttl = 1; u_short ident; u_short port; /* protocol specific base "port" */ int options; /* socket options */ int verbose; int waittime = 5; /* time to wait for response (in seconds) */ int nflag; /* print addresses numerically */ int as_path; /* print as numbers for each hop */ char *as_server = NULL; void *asn; #ifdef CANT_HACK_IPCKSUM int doipcksum = 0; /* don't calculate ip checksums by default */ #else int doipcksum = 1; /* calculate ip checksums by default */ #endif int optlen; /* length of ip options */ int fixedPort = 0; /* Use fixed destination port for TCP and UDP */ int printdiff = 0; /* Print the difference between sent and quoted */ int ecnflag = 0; /* ECN bleaching detection flag */ extern int optind; extern int opterr; extern char *optarg; #ifdef WITH_CASPER static cap_channel_t *capdns; #endif /* Forwards */ double deltaT(struct timeval *, struct timeval *); void freehostinfo(struct hostinfo *); void getaddr(u_int32_t *, char *); struct hostinfo *gethostinfo(char *); u_short in_cksum(u_short *, int); u_int32_t sctp_crc32c(const void *, u_int32_t); char *inetname(struct in_addr); int main(int, char **); u_short p_cksum(struct ip *, u_short *, int, int); int packet_ok(u_char *, int, struct sockaddr_in *, int); char *pr_type(u_char); void print(u_char *, int, struct sockaddr_in *); #ifdef IPSEC int setpolicy(int so, char *policy); #endif void send_probe(int, int); struct outproto *setproto(char *); int str2val(const char *, const char *, int, int); void tvsub(struct timeval *, struct timeval *); void usage(void); int wait_for_reply(int, struct sockaddr_in *, const struct timeval *); void pkt_compare(const u_char *, int, const u_char *, int); void udp_prep(struct outdata *); int udp_check(const u_char *, int); void udplite_prep(struct outdata *); int udplite_check(const u_char *, int); void tcp_prep(struct outdata *); int tcp_check(const u_char *, int); void sctp_prep(struct outdata *); int sctp_check(const u_char *, int); void gre_prep(struct outdata *); int gre_check(const u_char *, int); void gen_prep(struct outdata *); int gen_check(const u_char *, int); void icmp_prep(struct outdata *); int icmp_check(const u_char *, int); /* Descriptor structure for each outgoing protocol we support */ struct outproto { char *name; /* name of protocol */ const char *key; /* An ascii key for the bytes of the header */ u_char num; /* IP protocol number */ u_short hdrlen; /* max size of protocol header */ u_short port; /* default base protocol-specific "port" */ void (*prepare)(struct outdata *); /* finish preparing an outgoing packet */ int (*check)(const u_char *, int); /* check an incoming packet */ }; /* List of supported protocols. The first one is the default. The last one is the handler for generic protocols not explicitly listed. */ struct outproto protos[] = { { "udp", "spt dpt len sum", IPPROTO_UDP, sizeof(struct udphdr), 32768 + 666, udp_prep, udp_check }, { "udplite", "spt dpt cov sum", IPPROTO_UDPLITE, sizeof(struct udphdr), 32768 + 666, udplite_prep, udplite_check }, { "tcp", "spt dpt seq ack xxflwin sum urp", IPPROTO_TCP, sizeof(struct tcphdr), 32768 + 666, tcp_prep, tcp_check }, { "sctp", "spt dpt vtag crc tyfllen tyfllen ", IPPROTO_SCTP, sizeof(struct sctphdr), 32768 + 666, sctp_prep, sctp_check }, { "gre", "flg pro len clid", IPPROTO_GRE, sizeof(struct grehdr), GRE_PPTP_PROTO, gre_prep, gre_check }, { "icmp", "typ cod sum ", IPPROTO_ICMP, sizeof(struct icmp), 0, icmp_prep, icmp_check }, { NULL, "", 0, 2 * sizeof(u_short), 0, gen_prep, gen_check }, }; struct outproto *proto = &protos[0]; const char *ip_hdr_key = "vhtslen id off tlprsum srcip dstip opts"; int main(int argc, char **argv) { register int op, code, n; register char *cp; register const char *err; register u_int32_t *ap; register struct sockaddr_in *from = (struct sockaddr_in *)&wherefrom; register struct sockaddr_in *to = (struct sockaddr_in *)&whereto; register struct hostinfo *hi; int on = 1; register struct protoent *pe; register int ttl, probe, i; register int seq = 0; int tos = 0, settos = 0; register int lsrr = 0; register u_short off = 0; struct ifaddrlist *al; char errbuf[132]; int requestPort = -1; int sump = 0; int sockerrno; #ifdef WITH_CASPER const char *types[] = { "NAME2ADDR", "ADDR2NAME" }; int families[1]; cap_channel_t *casper; #endif cap_rights_t rights; bool cansandbox; /* Insure the socket fds won't be 0, 1 or 2 */ if (open(devnull, O_RDONLY) < 0 || open(devnull, O_RDONLY) < 0 || open(devnull, O_RDONLY) < 0) { Fprintf(stderr, "%s: open \"%s\": %s\n", prog, devnull, strerror(errno)); exit(1); } /* * Do the setuid-required stuff first, then lose privileges ASAP. * Do error checking for these two calls where they appeared in * the original code. */ cp = "icmp"; pe = getprotobyname(cp); if (pe) { if ((s = socket(AF_INET, SOCK_RAW, pe->p_proto)) < 0) sockerrno = errno; else if ((sndsock = socket(AF_INET, SOCK_RAW, IPPROTO_RAW)) < 0) sockerrno = errno; } if (setuid(getuid()) != 0) { perror("setuid()"); exit(1); } #ifdef WITH_CASPER casper = cap_init(); if (casper == NULL) errx(1, "unable to create casper process"); capdns = cap_service_open(casper, "system.dns"); if (capdns == NULL) errx(1, "unable to open system.dns service"); if (cap_dns_type_limit(capdns, types, 2) < 0) errx(1, "unable to limit access to system.dns service"); families[0] = AF_INET; if (cap_dns_family_limit(capdns, families, 1) < 0) errx(1, "unable to limit access to system.dns service"); #endif /* WITH_CASPER */ #ifdef IPCTL_DEFTTL { int mib[4] = { CTL_NET, PF_INET, IPPROTO_IP, IPCTL_DEFTTL }; size_t sz = sizeof(max_ttl); if (sysctl(mib, 4, &max_ttl, &sz, NULL, 0) == -1) { perror("sysctl(net.inet.ip.ttl)"); exit(1); } } #else /* !IPCTL_DEFTTL */ max_ttl = 30; #endif #ifdef WITH_CASPER cap_close(casper); #endif if (argv[0] == NULL) prog = "traceroute"; else if ((cp = strrchr(argv[0], '/')) != NULL) prog = cp + 1; else prog = argv[0]; opterr = 0; while ((op = getopt(argc, argv, "aA:eEdDFInrSvxf:g:i:M:m:P:p:q:s:t:w:z:")) != EOF) switch (op) { case 'a': as_path = 1; break; case 'A': as_path = 1; as_server = optarg; break; case 'd': options |= SO_DEBUG; break; case 'D': printdiff = 1; break; case 'e': fixedPort = 1; break; case 'E': ecnflag = 1; break; case 'f': case 'M': /* FreeBSD compat. */ first_ttl = str2val(optarg, "first ttl", 1, 255); break; case 'F': off = IP_DF; break; case 'g': if (lsrr >= NGATEWAYS) { Fprintf(stderr, "%s: No more than %d gateways\n", prog, NGATEWAYS); exit(1); } getaddr(gwlist + lsrr, optarg); ++lsrr; break; case 'i': device = optarg; break; case 'I': proto = setproto("icmp"); break; case 'm': max_ttl = str2val(optarg, "max ttl", 1, 255); break; case 'n': ++nflag; break; case 'P': proto = setproto(optarg); break; case 'p': requestPort = (u_short)str2val(optarg, "port", 1, (1 << 16) - 1); break; case 'q': nprobes = str2val(optarg, "nprobes", 1, -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 'S': sump = 1; break; case 't': tos = str2val(optarg, "tos", 0, 255); ++settos; break; case 'v': ++verbose; break; case 'x': doipcksum = (doipcksum == 0); break; case 'w': waittime = str2val(optarg, "wait time", 1, 24 * 60 * 60); break; case 'z': pausemsecs = str2val(optarg, "pause msecs", 0, 60 * 60 * 1000); break; default: usage(); } /* Set requested port, if any, else default for this protocol */ port = (requestPort != -1) ? requestPort : proto->port; if (nprobes == -1) nprobes = printdiff ? 1 : 3; if (first_ttl > max_ttl) { Fprintf(stderr, "%s: first ttl (%d) may not be greater than max ttl (%d)\n", prog, first_ttl, max_ttl); exit(1); } if (!doipcksum) Fprintf(stderr, "%s: Warning: ip checksums disabled\n", prog); if (lsrr > 0) optlen = (lsrr + 1) * sizeof(gwlist[0]); minpacket = sizeof(*outip) + proto->hdrlen + optlen; if (minpacket > 40) packlen = minpacket; else packlen = 40; /* Process destination and optional packet size */ switch (argc - optind) { case 2: packlen = str2val(argv[optind + 1], "packet length", minpacket, maxpacket); /* Fall through */ case 1: hostname = argv[optind]; hi = gethostinfo(hostname); setsin(to, hi->addrs[0]); if (hi->n > 1) Fprintf(stderr, "%s: Warning: %s has multiple addresses; using %s\n", prog, hostname, inet_ntoa(to->sin_addr)); hostname = hi->name; hi->name = NULL; freehostinfo(hi); break; default: usage(); } setlinebuf(stdout); protlen = packlen - sizeof(*outip) - optlen; if ((proto->num == IPPROTO_SCTP) && (packlen & 3)) { Fprintf(stderr, "%s: packet length must be a multiple of 4\n", prog); exit(1); } outip = (struct ip *)malloc((unsigned)packlen); if (outip == NULL) { Fprintf(stderr, "%s: malloc: %s\n", prog, strerror(errno)); exit(1); } memset((char *)outip, 0, packlen); outip->ip_v = IPVERSION; if (settos) outip->ip_tos = tos; if (ecnflag) { outip->ip_tos &= ~IPTOS_ECN_MASK; outip->ip_tos |= IPTOS_ECN_ECT1; } outip->ip_len = htons(packlen); outip->ip_off = htons(off); outip->ip_p = proto->num; outp = (u_char *)(outip + 1); if (lsrr > 0) { register u_char *optlist; optlist = outp; outp += optlen; /* final hop */ gwlist[lsrr] = to->sin_addr.s_addr; outip->ip_dst.s_addr = gwlist[0]; /* force 4 byte alignment */ optlist[0] = IPOPT_NOP; /* loose source route option */ optlist[1] = IPOPT_LSRR; i = lsrr * sizeof(gwlist[0]); optlist[2] = i + 3; /* Pointer to LSRR addresses */ optlist[3] = IPOPT_MINOFF; memcpy(optlist + 4, gwlist + 1, i); } else outip->ip_dst = to->sin_addr; outip->ip_hl = (outp - (u_char *)outip) >> 2; ident = (getpid() & 0xffff) | 0x8000; if (pe == NULL) { Fprintf(stderr, "%s: unknown protocol %s\n", prog, cp); exit(1); } if (s < 0) { errno = sockerrno; Fprintf(stderr, "%s: icmp socket: %s\n", prog, strerror(errno)); exit(1); } 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 defined(IPSEC) && defined(IPSEC_POLICY_IPSEC) if (setpolicy(s, "in bypass") < 0) errx(1, "%s", ipsec_strerror()); if (setpolicy(s, "out bypass") < 0) errx(1, "%s", ipsec_strerror()); #endif /* defined(IPSEC) && defined(IPSEC_POLICY_IPSEC) */ if (sndsock < 0) { errno = sockerrno; Fprintf(stderr, "%s: raw socket: %s\n", prog, strerror(errno)); exit(1); } #ifdef SO_SNDBUF if (setsockopt(sndsock, SOL_SOCKET, SO_SNDBUF, (char *)&packlen, sizeof(packlen)) < 0) { Fprintf(stderr, "%s: SO_SNDBUF: %s\n", prog, strerror(errno)); exit(1); } #endif #ifdef IP_HDRINCL if (setsockopt(sndsock, IPPROTO_IP, IP_HDRINCL, (char *)&on, sizeof(on)) < 0) { Fprintf(stderr, "%s: IP_HDRINCL: %s\n", prog, strerror(errno)); exit(1); } #else #ifdef IP_TOS if (settos && setsockopt(sndsock, IPPROTO_IP, IP_TOS, (char *)&tos, sizeof(tos)) < 0) { Fprintf(stderr, "%s: setsockopt tos %d: %s\n", prog, tos, strerror(errno)); exit(1); } #endif #endif 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)); /* Get the interface address list */ n = ifaddrlist(&al, errbuf); if (n < 0) { Fprintf(stderr, "%s: ifaddrlist: %s\n", prog, errbuf); exit(1); } if (n == 0) { Fprintf(stderr, "%s: Can't find any network interfaces\n", prog); exit(1); } /* Look for a specific device */ if (device != NULL) { for (i = n; i > 0; --i, ++al) if (strcmp(device, al->device) == 0) break; if (i <= 0) { Fprintf(stderr, "%s: Can't find interface %.32s\n", prog, device); exit(1); } } /* Determine our source address */ if (source == NULL) { /* * If a device was specified, use the interface address. * Otherwise, try to determine our source address. */ if (device != NULL) setsin(from, al->addr); else if ((err = findsaddr(to, from)) != NULL) { Fprintf(stderr, "%s: findsaddr: %s\n", prog, err); exit(1); } } else { hi = gethostinfo(source); source = hi->name; hi->name = NULL; /* * If the device was specified make sure it * corresponds to the source address specified. * Otherwise, use the first address (and warn if * there are more than one). */ if (device != NULL) { for (i = hi->n, ap = hi->addrs; i > 0; --i, ++ap) if (*ap == al->addr) break; if (i <= 0) { Fprintf(stderr, "%s: %s is not on interface %.32s\n", prog, source, device); exit(1); } setsin(from, *ap); } else { setsin(from, hi->addrs[0]); if (hi->n > 1) Fprintf(stderr, "%s: Warning: %s has multiple addresses; using %s\n", prog, source, inet_ntoa(from->sin_addr)); } freehostinfo(hi); } outip->ip_src = from->sin_addr; /* Check the source address (-s), if any, is valid */ if (bind(sndsock, (struct sockaddr *)from, sizeof(*from)) < 0) { Fprintf(stderr, "%s: bind: %s\n", prog, strerror(errno)); exit(1); } if (as_path) { asn = as_setup(as_server); if (asn == NULL) { Fprintf(stderr, "%s: as_setup failed, AS# lookups" " disabled\n", prog); (void)fflush(stderr); as_path = 0; } } if (connect(sndsock, (struct sockaddr *)&whereto, sizeof(whereto)) != 0) { Fprintf(stderr, "%s: connect: %s\n", prog, strerror(errno)); exit(1); } #ifdef WITH_CASPER cansandbox = true; #else if (nflag) cansandbox = true; else cansandbox = false; #endif caph_cache_catpages(); /* * Here we enter capability mode. Further down access to global * namespaces (e.g filesystem) is restricted (see capsicum(4)). * We must connect(2) our socket before this point. */ if (cansandbox && cap_enter() < 0) { if (errno != ENOSYS) { Fprintf(stderr, "%s: cap_enter: %s\n", prog, strerror(errno)); exit(1); } else { cansandbox = false; } } cap_rights_init(&rights, CAP_SEND, CAP_SETSOCKOPT); if (cansandbox && cap_rights_limit(sndsock, &rights) < 0) { Fprintf(stderr, "%s: cap_rights_limit sndsock: %s\n", prog, strerror(errno)); exit(1); } cap_rights_init(&rights, CAP_RECV, CAP_EVENT); if (cansandbox && cap_rights_limit(s, &rights) < 0) { Fprintf(stderr, "%s: cap_rights_limit s: %s\n", prog, strerror(errno)); exit(1); } #if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC) if (setpolicy(sndsock, "in bypass") < 0) errx(1, "%s", ipsec_strerror()); if (setpolicy(sndsock, "out bypass") < 0) errx(1, "%s", ipsec_strerror()); #endif /* defined(IPSEC) && defined(IPSEC_POLICY_IPSEC) */ Fprintf(stderr, "%s to %s (%s)", prog, hostname, inet_ntoa(to->sin_addr)); if (source) Fprintf(stderr, " from %s", source); Fprintf(stderr, ", %d hops max, %d byte packets\n", max_ttl, packlen); (void)fflush(stderr); for (ttl = first_ttl; ttl <= max_ttl; ++ttl) { u_int32_t lastaddr = 0; int gotlastaddr = 0; int got_there = 0; int unreachable = 0; int sentfirst = 0; int loss; Printf("%2d ", ttl); for (probe = 0, loss = 0; probe < nprobes; ++probe) { register int cc; struct timeval t1, t2; register struct ip *ip; struct outdata outdata; if (sentfirst && pausemsecs > 0) usleep(pausemsecs * 1000); /* Prepare outgoing data */ outdata.seq = ++seq; outdata.ttl = ttl; /* Avoid alignment problems by copying bytewise: */ (void)gettimeofday(&t1, NULL); memcpy(&outdata.tv, &t1, sizeof(outdata.tv)); /* Finalize and send packet */ (*proto->prepare)(&outdata); send_probe(seq, ttl); ++sentfirst; /* Wait for a reply */ while ((cc = wait_for_reply(s, from, &t1)) != 0) { double T; int precis; (void)gettimeofday(&t2, NULL); i = packet_ok(packet, cc, from, seq); /* Skip short packet */ if (i == 0) continue; if (!gotlastaddr || from->sin_addr.s_addr != lastaddr) { if (gotlastaddr) printf("\n "); print(packet, cc, from); lastaddr = from->sin_addr.s_addr; ++gotlastaddr; } T = deltaT(&t1, &t2); #ifdef SANE_PRECISION if (T >= 1000.0) precis = 0; else if (T >= 100.0) precis = 1; else if (T >= 10.0) precis = 2; else #endif precis = 3; Printf(" %.*f ms", precis, T); if (ecnflag) { u_char ecn = hip->ip_tos & IPTOS_ECN_MASK; switch (ecn) { case IPTOS_ECN_ECT1: Printf(" (ecn=passed)"); break; case IPTOS_ECN_NOTECT: Printf(" (ecn=bleached)"); break; case IPTOS_ECN_CE: Printf(" (ecn=congested)"); break; default: Printf(" (ecn=mangled)"); break; } } if (printdiff) { Printf("\n"); Printf("%*.*s%s\n", -(outip->ip_hl << 3), outip->ip_hl << 3, ip_hdr_key, proto->key); pkt_compare((void *)outip, packlen, (void *)hip, hiplen); } if (i == -2) { #ifndef ARCHAIC ip = (struct ip *)packet; if (ip->ip_ttl <= 1) Printf(" !"); #endif ++got_there; break; } /* time exceeded in transit */ if (i == -1) break; code = i - 1; switch (code) { case ICMP_UNREACH_PORT: #ifndef ARCHAIC ip = (struct ip *)packet; if (ip->ip_ttl <= 1) Printf(" !"); #endif ++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-%d", pmtu); break; case ICMP_UNREACH_SRCFAIL: ++unreachable; Printf(" !S"); break; case ICMP_UNREACH_NET_UNKNOWN: ++unreachable; Printf(" !U"); break; case ICMP_UNREACH_HOST_UNKNOWN: ++unreachable; Printf(" !W"); break; case ICMP_UNREACH_ISOLATED: ++unreachable; Printf(" !I"); break; case ICMP_UNREACH_NET_PROHIB: ++unreachable; Printf(" !A"); break; case ICMP_UNREACH_HOST_PROHIB: ++unreachable; Printf(" !Z"); break; case ICMP_UNREACH_TOSNET: ++unreachable; Printf(" !Q"); break; case ICMP_UNREACH_TOSHOST: ++unreachable; Printf(" !T"); break; case ICMP_UNREACH_FILTER_PROHIB: ++unreachable; Printf(" !X"); break; case ICMP_UNREACH_HOST_PRECEDENCE: ++unreachable; Printf(" !V"); break; case ICMP_UNREACH_PRECEDENCE_CUTOFF: ++unreachable; Printf(" !C"); break; default: ++unreachable; Printf(" !<%d>", code); break; } break; } if (cc == 0) { loss++; Printf(" *"); } (void)fflush(stdout); } if (sump) { Printf(" (%d%% loss)", (loss * 100) / nprobes); } putchar('\n'); if (got_there || (unreachable > 0 && unreachable >= nprobes - 1)) break; } if (as_path) as_shutdown(asn); exit(0); } int wait_for_reply(register int sock, register struct sockaddr_in *fromp, register const struct timeval *tp) { fd_set *fdsp; size_t nfds; struct timeval now, wait; register int cc = 0; register int error; int fromlen = sizeof(*fromp); nfds = howmany(sock + 1, NFDBITS); if ((fdsp = malloc(nfds * sizeof(fd_mask))) == NULL) err(1, "malloc"); memset(fdsp, 0, nfds * sizeof(fd_mask)); FD_SET(sock, fdsp); wait.tv_sec = tp->tv_sec + waittime; wait.tv_usec = tp->tv_usec; (void)gettimeofday(&now, NULL); tvsub(&wait, &now); if (wait.tv_sec < 0) { wait.tv_sec = 0; wait.tv_usec = 1; } error = select(sock + 1, fdsp, NULL, NULL, &wait); if (error == -1 && errno == EINVAL) { Fprintf(stderr, "%s: botched select() args\n", prog); exit(1); } if (error > 0) cc = recvfrom(sock, (char *)packet, sizeof(packet), 0, (struct sockaddr *)fromp, &fromlen); free(fdsp); return (cc); } void send_probe(int seq, int ttl) { register int cc; outip->ip_ttl = ttl; outip->ip_id = htons(ident + seq); /* XXX undocumented debugging hack */ if (verbose > 1) { register const u_short *sp; register int nshorts, i; sp = (u_short *)outip; nshorts = (u_int)packlen / sizeof(u_short); i = 0; Printf("[ %d bytes", packlen); while (--nshorts >= 0) { if ((i++ % 8) == 0) Printf("\n\t"); Printf(" %04x", ntohs(*sp++)); } if (packlen & 1) { if ((i % 8) == 0) Printf("\n\t"); Printf(" %02x", *(u_char *)sp); } Printf("]\n"); } #if !defined(IP_HDRINCL) && defined(IP_TTL) if (setsockopt(sndsock, IPPROTO_IP, IP_TTL, (char *)&ttl, sizeof(ttl)) < 0) { Fprintf(stderr, "%s: setsockopt ttl %d: %s\n", prog, ttl, strerror(errno)); exit(1); } #endif cc = send(sndsock, (char *)outip, packlen, 0); if (cc < 0 || cc != packlen) { if (cc < 0) Fprintf(stderr, "%s: sendto: %s\n", prog, strerror(errno)); Printf("%s: wrote %s %d chars, ret=%d\n", prog, hostname, packlen, cc); (void)fflush(stdout); } } #if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC) int setpolicy(int so, char *policy) { char *buf; buf = ipsec_set_policy(policy, strlen(policy)); if (buf == NULL) { warnx("%s", ipsec_strerror()); return (-1); } (void)setsockopt(so, IPPROTO_IP, IP_IPSEC_POLICY, buf, ipsec_get_policylen(buf)); free(buf); return (0); } #endif double deltaT(struct timeval *t1p, struct timeval *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(register 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(register u_char *buf, int cc, register struct sockaddr_in *from, register int seq) { register struct icmp *icp; register u_char type, code; register int hlen; #ifndef ARCHAIC register 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 type = icp->icmp_type; code = icp->icmp_code; /* Path MTU Discovery (RFC1191) */ if (code != ICMP_UNREACH_NEEDFRAG) pmtu = 0; else { pmtu = ntohs(icp->icmp_nextmtu); } if (type == ICMP_ECHOREPLY && proto->num == IPPROTO_ICMP && (*proto->check)((u_char *)icp, (u_char)seq)) return (-2); if ((type == ICMP_TIMXCEED && code == ICMP_TIMXCEED_INTRANS) || type == ICMP_UNREACH) { u_char *inner; hip = &icp->icmp_ip; hiplen = ((u_char *)icp + cc) - (u_char *)hip; hlen = hip->ip_hl << 2; inner = (u_char *)((u_char *)hip + hlen); if (hlen + 16 <= cc && hip->ip_p == proto->num && (*proto->check)(inner, (u_char)seq)) return (type == ICMP_TIMXCEED ? -1 : code + 1); } #ifndef ARCHAIC if (verbose) { register int i; u_int32_t *lp = (u_int32_t *)&icp->icmp_ip; Printf("\n%d bytes from %s to ", cc, inet_ntoa(from->sin_addr)); Printf("%s: icmp type %d (%s) code %d\n", inet_ntoa(ip->ip_dst), type, pr_type(type), icp->icmp_code); for (i = 4; i <= cc - ICMP_MINLEN; i += sizeof(*lp)) Printf("%2d: %8.8x\n", i, ntohl(*lp++)); } #endif return (0); } void icmp_prep(struct outdata *outdata) { struct icmp *const icmpheader = (struct icmp *) outp; icmpheader->icmp_type = ICMP_ECHO; icmpheader->icmp_id = htons(ident); icmpheader->icmp_seq = htons(outdata->seq); icmpheader->icmp_cksum = 0; icmpheader->icmp_cksum = in_cksum((u_short *)icmpheader, protlen); if (icmpheader->icmp_cksum == 0) icmpheader->icmp_cksum = 0xffff; } int icmp_check(const u_char *data, int seq) { struct icmp *const icmpheader = (struct icmp *) data; return (icmpheader->icmp_id == htons(ident) && icmpheader->icmp_seq == htons(seq)); } void udp_prep(struct outdata *outdata) { struct udphdr *const outudp = (struct udphdr *) outp; outudp->uh_sport = htons(ident + (fixedPort ? outdata->seq : 0)); outudp->uh_dport = htons(port + (fixedPort ? 0 : outdata->seq)); outudp->uh_ulen = htons((u_short)protlen); outudp->uh_sum = 0; if (doipcksum) { u_short sum = p_cksum(outip, (u_short *)outudp, protlen, protlen); outudp->uh_sum = (sum) ? sum : 0xffff; } return; } int udp_check(const u_char *data, int seq) { struct udphdr *const udp = (struct udphdr *) data; return (ntohs(udp->uh_sport) == ident + (fixedPort ? seq : 0) && ntohs(udp->uh_dport) == port + (fixedPort ? 0 : seq)); } void udplite_prep(struct outdata *outdata) { struct udphdr *const outudp = (struct udphdr *) outp; outudp->uh_sport = htons(ident + (fixedPort ? outdata->seq : 0)); outudp->uh_dport = htons(port + (fixedPort ? 0 : outdata->seq)); outudp->uh_ulen = htons(8); outudp->uh_sum = 0; if (doipcksum) { u_short sum = p_cksum(outip, (u_short *)outudp, protlen, 8); outudp->uh_sum = (sum) ? sum : 0xffff; } return; } int udplite_check(const u_char *data, int seq) { struct udphdr *const udp = (struct udphdr *) data; return (ntohs(udp->uh_sport) == ident + (fixedPort ? seq : 0) && ntohs(udp->uh_dport) == port + (fixedPort ? 0 : seq)); } void tcp_prep(struct outdata *outdata) { struct tcphdr *const tcp = (struct tcphdr *) outp; tcp->th_sport = htons(ident); tcp->th_dport = htons(port + (fixedPort ? 0 : outdata->seq)); tcp->th_seq = (tcp->th_sport << 16) | tcp->th_dport; tcp->th_ack = 0; tcp->th_off = 5; __tcp_set_flags(tcp, TH_SYN); tcp->th_sum = 0; if (doipcksum) tcp->th_sum = p_cksum(outip, (u_short *)tcp, protlen, protlen); } int tcp_check(const u_char *data, int seq) { struct tcphdr *const tcp = (struct tcphdr *) data; return (ntohs(tcp->th_sport) == ident && ntohs(tcp->th_dport) == port + (fixedPort ? 0 : seq) && tcp->th_seq == (tcp_seq)((tcp->th_sport << 16) | tcp->th_dport)); } void sctp_prep(struct outdata *outdata) { struct sctphdr *const sctp = (struct sctphdr *) outp; struct sctp_chunkhdr *chk; struct sctp_init_chunk *init; struct sctp_paramhdr *param; sctp->src_port = htons(ident); sctp->dest_port = htons(port + (fixedPort ? 0 : outdata->seq)); if (protlen >= (int)(sizeof(struct sctphdr) + sizeof(struct sctp_init_chunk))) { sctp->v_tag = 0; } else { sctp->v_tag = (sctp->src_port << 16) | sctp->dest_port; } sctp->checksum = htonl(0); if (protlen >= (int)(sizeof(struct sctphdr) + sizeof(struct sctp_init_chunk))) { /* * Send a packet containing an INIT chunk. This works * better in case of firewalls on the path, but * results in a probe packet containing at least * 32 bytes of payload. For shorter payloads, use * SHUTDOWN-ACK chunks. */ init = (struct sctp_init_chunk *)(sctp + 1); init->ch.chunk_type = SCTP_INITIATION; init->ch.chunk_flags = 0; init->ch.chunk_length = htons((u_int16_t)(protlen - sizeof(struct sctphdr))); init->init.initiate_tag = (sctp->src_port << 16) | sctp->dest_port; init->init.a_rwnd = htonl(1500); init->init.num_outbound_streams = htons(1); init->init.num_inbound_streams = htons(1); init->init.initial_tsn = htonl(0); if (protlen >= (int)(sizeof(struct sctphdr) + sizeof(struct sctp_init_chunk) + sizeof(struct sctp_paramhdr))) { param = (struct sctp_paramhdr *)(init + 1); param->param_type = htons(SCTP_PAD); param->param_length = htons((u_int16_t)(protlen - sizeof(struct sctphdr) - sizeof(struct sctp_init_chunk))); } } else { /* * Send a packet containing a SHUTDOWN-ACK chunk, * possibly followed by a PAD chunk. */ if (protlen >= (int)(sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr))) { chk = (struct sctp_chunkhdr *)(sctp + 1); chk->chunk_type = SCTP_SHUTDOWN_ACK; chk->chunk_flags = 0; chk->chunk_length = htons(4); } if (protlen >= (int)(sizeof(struct sctphdr) + 2 * sizeof(struct sctp_chunkhdr))) { chk = chk + 1; chk->chunk_type = SCTP_PAD_CHUNK; chk->chunk_flags = 0; chk->chunk_length = htons(protlen - (sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr))); } } if (doipcksum) { sctp->checksum = sctp_crc32c(sctp, protlen); } } int sctp_check(const u_char *data, int seq) { struct sctphdr *const sctp = (struct sctphdr *) data; if (ntohs(sctp->src_port) != ident || ntohs(sctp->dest_port) != port + (fixedPort ? 0 : seq)) return (0); if (protlen < (int)(sizeof(struct sctphdr) + sizeof(struct sctp_init_chunk))) { return (sctp->v_tag == (u_int32_t)((sctp->src_port << 16) | sctp->dest_port)); } else { /* * Don't verify the initiate_tag, since it is not available, * most of the time. */ return (sctp->v_tag == 0); } } void gre_prep(struct outdata *outdata) { struct grehdr *const gre = (struct grehdr *) outp; gre->flags = htons(0x2001); gre->proto = htons(port); gre->length = 0; gre->callId = htons(ident + outdata->seq); } int gre_check(const u_char *data, int seq) { struct grehdr *const gre = (struct grehdr *) data; return (ntohs(gre->proto) == port && ntohs(gre->callId) == ident + seq); } void gen_prep(struct outdata *outdata) { u_int16_t *const ptr = (u_int16_t *) outp; ptr[0] = htons(ident); ptr[1] = htons(port + outdata->seq); } int gen_check(const u_char *data, int seq) { u_int16_t *const ptr = (u_int16_t *) data; return (ntohs(ptr[0]) == ident && ntohs(ptr[1]) == port + seq); } void print(register u_char *buf, register int cc, register struct sockaddr_in *from) { register struct ip *ip; register int hlen; + int as, status; char addr[INET_ADDRSTRLEN]; ip = (struct ip *) buf; hlen = ip->ip_hl << 2; cc -= hlen; strlcpy(addr, inet_ntoa(from->sin_addr), sizeof(addr)); - if (as_path) - Printf(" [AS%u]", as_lookup(asn, addr, AF_INET)); + while(as_path) { + as = as_lookup(asn, addr, AF_INET, &status); + if (status) { + as_shutdown(asn); + asn = as_setup(as_server); + if (asn == NULL) { + Fprintf(stderr, "%s: as_setup failed, AS# lookups" + " disabled\n", prog); + (void)fflush(stderr); + as_path = 0; + break; + } + else + continue; + } + Printf(" [AS%u]", as); + break; + } if (nflag) Printf(" %s", addr); else Printf(" %s (%s)", inetname(from->sin_addr), addr); if (verbose) Printf(" %d bytes to %s", cc, inet_ntoa(ip->ip_dst)); } /* * Checksum routine for UDP and TCP headers. */ u_short p_cksum(struct ip *ip, u_short *data, int len, int cov) { static struct ipovly ipo; u_short sum[2]; ipo.ih_pr = ip->ip_p; ipo.ih_len = htons(len); ipo.ih_src = ip->ip_src; ipo.ih_dst = ip->ip_dst; sum[1] = in_cksum((u_short *)&ipo, sizeof(ipo)); /* pseudo ip hdr cksum */ sum[0] = in_cksum(data, cov); /* payload data cksum */ return (~in_cksum(sum, sizeof(sum))); } /* * Checksum routine for Internet Protocol family headers (C Version) */ u_short in_cksum(register u_short *addr, register 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); } /* * CRC32C routine for the Stream Control Transmission Protocol */ #define CRC32C(c, d) (c = (c >> 8) ^ crc_c[(c ^ (d)) & 0xFF]) static u_int32_t crc_c[256] = { 0x00000000, 0xF26B8303, 0xE13B70F7, 0x1350F3F4, 0xC79A971F, 0x35F1141C, 0x26A1E7E8, 0xD4CA64EB, 0x8AD958CF, 0x78B2DBCC, 0x6BE22838, 0x9989AB3B, 0x4D43CFD0, 0xBF284CD3, 0xAC78BF27, 0x5E133C24, 0x105EC76F, 0xE235446C, 0xF165B798, 0x030E349B, 0xD7C45070, 0x25AFD373, 0x36FF2087, 0xC494A384, 0x9A879FA0, 0x68EC1CA3, 0x7BBCEF57, 0x89D76C54, 0x5D1D08BF, 0xAF768BBC, 0xBC267848, 0x4E4DFB4B, 0x20BD8EDE, 0xD2D60DDD, 0xC186FE29, 0x33ED7D2A, 0xE72719C1, 0x154C9AC2, 0x061C6936, 0xF477EA35, 0xAA64D611, 0x580F5512, 0x4B5FA6E6, 0xB93425E5, 0x6DFE410E, 0x9F95C20D, 0x8CC531F9, 0x7EAEB2FA, 0x30E349B1, 0xC288CAB2, 0xD1D83946, 0x23B3BA45, 0xF779DEAE, 0x05125DAD, 0x1642AE59, 0xE4292D5A, 0xBA3A117E, 0x4851927D, 0x5B016189, 0xA96AE28A, 0x7DA08661, 0x8FCB0562, 0x9C9BF696, 0x6EF07595, 0x417B1DBC, 0xB3109EBF, 0xA0406D4B, 0x522BEE48, 0x86E18AA3, 0x748A09A0, 0x67DAFA54, 0x95B17957, 0xCBA24573, 0x39C9C670, 0x2A993584, 0xD8F2B687, 0x0C38D26C, 0xFE53516F, 0xED03A29B, 0x1F682198, 0x5125DAD3, 0xA34E59D0, 0xB01EAA24, 0x42752927, 0x96BF4DCC, 0x64D4CECF, 0x77843D3B, 0x85EFBE38, 0xDBFC821C, 0x2997011F, 0x3AC7F2EB, 0xC8AC71E8, 0x1C661503, 0xEE0D9600, 0xFD5D65F4, 0x0F36E6F7, 0x61C69362, 0x93AD1061, 0x80FDE395, 0x72966096, 0xA65C047D, 0x5437877E, 0x4767748A, 0xB50CF789, 0xEB1FCBAD, 0x197448AE, 0x0A24BB5A, 0xF84F3859, 0x2C855CB2, 0xDEEEDFB1, 0xCDBE2C45, 0x3FD5AF46, 0x7198540D, 0x83F3D70E, 0x90A324FA, 0x62C8A7F9, 0xB602C312, 0x44694011, 0x5739B3E5, 0xA55230E6, 0xFB410CC2, 0x092A8FC1, 0x1A7A7C35, 0xE811FF36, 0x3CDB9BDD, 0xCEB018DE, 0xDDE0EB2A, 0x2F8B6829, 0x82F63B78, 0x709DB87B, 0x63CD4B8F, 0x91A6C88C, 0x456CAC67, 0xB7072F64, 0xA457DC90, 0x563C5F93, 0x082F63B7, 0xFA44E0B4, 0xE9141340, 0x1B7F9043, 0xCFB5F4A8, 0x3DDE77AB, 0x2E8E845F, 0xDCE5075C, 0x92A8FC17, 0x60C37F14, 0x73938CE0, 0x81F80FE3, 0x55326B08, 0xA759E80B, 0xB4091BFF, 0x466298FC, 0x1871A4D8, 0xEA1A27DB, 0xF94AD42F, 0x0B21572C, 0xDFEB33C7, 0x2D80B0C4, 0x3ED04330, 0xCCBBC033, 0xA24BB5A6, 0x502036A5, 0x4370C551, 0xB11B4652, 0x65D122B9, 0x97BAA1BA, 0x84EA524E, 0x7681D14D, 0x2892ED69, 0xDAF96E6A, 0xC9A99D9E, 0x3BC21E9D, 0xEF087A76, 0x1D63F975, 0x0E330A81, 0xFC588982, 0xB21572C9, 0x407EF1CA, 0x532E023E, 0xA145813D, 0x758FE5D6, 0x87E466D5, 0x94B49521, 0x66DF1622, 0x38CC2A06, 0xCAA7A905, 0xD9F75AF1, 0x2B9CD9F2, 0xFF56BD19, 0x0D3D3E1A, 0x1E6DCDEE, 0xEC064EED, 0xC38D26C4, 0x31E6A5C7, 0x22B65633, 0xD0DDD530, 0x0417B1DB, 0xF67C32D8, 0xE52CC12C, 0x1747422F, 0x49547E0B, 0xBB3FFD08, 0xA86F0EFC, 0x5A048DFF, 0x8ECEE914, 0x7CA56A17, 0x6FF599E3, 0x9D9E1AE0, 0xD3D3E1AB, 0x21B862A8, 0x32E8915C, 0xC083125F, 0x144976B4, 0xE622F5B7, 0xF5720643, 0x07198540, 0x590AB964, 0xAB613A67, 0xB831C993, 0x4A5A4A90, 0x9E902E7B, 0x6CFBAD78, 0x7FAB5E8C, 0x8DC0DD8F, 0xE330A81A, 0x115B2B19, 0x020BD8ED, 0xF0605BEE, 0x24AA3F05, 0xD6C1BC06, 0xC5914FF2, 0x37FACCF1, 0x69E9F0D5, 0x9B8273D6, 0x88D28022, 0x7AB90321, 0xAE7367CA, 0x5C18E4C9, 0x4F48173D, 0xBD23943E, 0xF36E6F75, 0x0105EC76, 0x12551F82, 0xE03E9C81, 0x34F4F86A, 0xC69F7B69, 0xD5CF889D, 0x27A40B9E, 0x79B737BA, 0x8BDCB4B9, 0x988C474D, 0x6AE7C44E, 0xBE2DA0A5, 0x4C4623A6, 0x5F16D052, 0xAD7D5351 }; u_int32_t sctp_crc32c(const void *packet, u_int32_t len) { u_int32_t i, crc32c; u_int8_t byte0, byte1, byte2, byte3; const u_int8_t *buf = (const u_int8_t *)packet; crc32c = ~0; for (i = 0; i < len; i++) CRC32C(crc32c, buf[i]); crc32c = ~crc32c; byte0 = crc32c & 0xff; byte1 = (crc32c >> 8) & 0xff; byte2 = (crc32c >> 16) & 0xff; byte3 = (crc32c >> 24) & 0xff; crc32c = ((byte0 << 24) | (byte1 << 16) | (byte2 << 8) | byte3); return (htonl(crc32c)); } /* * Subtract 2 timeval structs: out = out - in. * Out is assumed to be within about LONG_MAX seconds of in. */ void tvsub(register struct timeval *out, register struct timeval *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(struct in_addr in) { register char *cp; register struct hostent *hp; static int first = 1; static char domain[MAXHOSTNAMELEN + 1], line[MAXHOSTNAMELEN + 1]; if (first && !nflag) { first = 0; if (gethostname(domain, sizeof(domain) - 1) < 0) domain[0] = '\0'; else { cp = strchr(domain, '.'); if (cp == NULL) { #ifdef WITH_CASPER if (capdns != NULL) hp = cap_gethostbyname(capdns, domain); else #endif hp = gethostbyname(domain); if (hp != NULL) cp = strchr(hp->h_name, '.'); } if (cp == NULL) domain[0] = '\0'; else { ++cp; (void)strncpy(domain, cp, sizeof(domain) - 1); domain[sizeof(domain) - 1] = '\0'; } } } if (!nflag && in.s_addr != INADDR_ANY) { #ifdef WITH_CASPER if (capdns != NULL) hp = cap_gethostbyaddr(capdns, (char *)&in, sizeof(in), AF_INET); else #endif hp = gethostbyaddr((char *)&in, sizeof(in), AF_INET); if (hp != NULL) { if ((cp = strchr(hp->h_name, '.')) != NULL && strcmp(cp + 1, domain) == 0) *cp = '\0'; (void)strncpy(line, hp->h_name, sizeof(line) - 1); line[sizeof(line) - 1] = '\0'; return (line); } } return (inet_ntoa(in)); } struct hostinfo * gethostinfo(register char *hostname) { register int n; register struct hostent *hp; register struct hostinfo *hi; register char **p; register u_int32_t addr, *ap; if (strlen(hostname) >= MAXHOSTNAMELEN) { Fprintf(stderr, "%s: hostname \"%.32s...\" is too long\n", prog, hostname); exit(1); } hi = calloc(1, sizeof(*hi)); if (hi == NULL) { Fprintf(stderr, "%s: calloc %s\n", prog, strerror(errno)); exit(1); } addr = inet_addr(hostname); if ((int32_t)addr != -1) { hi->name = strdup(hostname); hi->n = 1; hi->addrs = calloc(1, sizeof(hi->addrs[0])); if (hi->addrs == NULL) { Fprintf(stderr, "%s: calloc %s\n", prog, strerror(errno)); exit(1); } hi->addrs[0] = addr; return (hi); } #ifdef WITH_CASPER if (capdns != NULL) hp = cap_gethostbyname(capdns, hostname); else #endif hp = gethostbyname(hostname); if (hp == NULL) { Fprintf(stderr, "%s: unknown host %s\n", prog, hostname); exit(1); } if (hp->h_addrtype != AF_INET || hp->h_length != 4) { Fprintf(stderr, "%s: bad host %s\n", prog, hostname); exit(1); } hi->name = strdup(hp->h_name); for (n = 0, p = hp->h_addr_list; *p != NULL; ++n, ++p) continue; hi->n = n; hi->addrs = calloc(n, sizeof(hi->addrs[0])); if (hi->addrs == NULL) { Fprintf(stderr, "%s: calloc %s\n", prog, strerror(errno)); exit(1); } for (ap = hi->addrs, p = hp->h_addr_list; *p != NULL; ++ap, ++p) memcpy(ap, *p, sizeof(*ap)); return (hi); } void freehostinfo(register struct hostinfo *hi) { if (hi->name != NULL) { free(hi->name); hi->name = NULL; } free((char *)hi->addrs); free((char *)hi); } void getaddr(register u_int32_t *ap, register char *hostname) { register struct hostinfo *hi; hi = gethostinfo(hostname); *ap = hi->addrs[0]; freehostinfo(hi); } void setsin(register struct sockaddr_in *sin, register u_int32_t addr) { memset(sin, 0, sizeof(*sin)); sin->sin_len = sizeof(*sin); sin->sin_family = AF_INET; sin->sin_addr.s_addr = addr; } /* String to value with optional min and max. Handles decimal and hex. */ int str2val(register const char *str, register const char *what, register int mi, register int ma) { register const char *cp; register int val; char *ep; if (str[0] == '0' && (str[1] == 'x' || str[1] == 'X')) { cp = str + 2; val = (int)strtol(cp, &ep, 16); } else val = (int)strtol(str, &ep, 10); if (*ep != '\0') { Fprintf(stderr, "%s: \"%s\" bad value for %s\n", prog, str, what); exit(1); } if (val < mi && mi >= 0) { if (mi == 0) Fprintf(stderr, "%s: %s must be >= %d\n", prog, what, mi); else Fprintf(stderr, "%s: %s must be > %d\n", prog, what, mi - 1); exit(1); } if (val > ma && ma >= 0) { Fprintf(stderr, "%s: %s must be <= %d\n", prog, what, ma); exit(1); } return (val); } struct outproto * setproto(char *pname) { struct outproto *proto; int i; for (i = 0; protos[i].name != NULL; i++) { if (strcasecmp(protos[i].name, pname) == 0) { break; } } proto = &protos[i]; if (proto->name == NULL) { /* generic handler */ struct protoent *pe; u_long pnum; /* Determine the IP protocol number */ if ((pe = getprotobyname(pname)) != NULL) pnum = pe->p_proto; else pnum = str2val(optarg, "proto number", 1, 255); proto->num = pnum; } return (proto); } void pkt_compare(const u_char *a, int la, const u_char *b, int lb) { int l; int i; for (i = 0; i < la; i++) Printf("%02x", (unsigned int)a[i]); Printf("\n"); l = (la <= lb) ? la : lb; for (i = 0; i < l; i++) if (a[i] == b[i]) Printf("__"); else Printf("%02x", (unsigned int)b[i]); for (; i < lb; i++) Printf("%02x", (unsigned int)b[i]); Printf("\n"); } void usage(void) { Fprintf(stderr, "Usage: %s [-adDeEFInrSvx] [-A as_server] [-f first_ttl] [-g gateway]\n" "\t[-i iface] [-m max_ttl] [-M first_ttl] [-p port] [-P proto]\n" "\t[-q nprobes] [-s src_addr] [-t tos] [-w waittime]\n" "\t[-z pausemsecs] host [packetlen]\n", prog); exit(1); } diff --git a/usr.sbin/traceroute6/traceroute6.c b/usr.sbin/traceroute6/traceroute6.c index 173e97c13bb3..eb6086706f9f 100644 --- a/usr.sbin/traceroute6/traceroute6.c +++ b/usr.sbin/traceroute6/traceroute6.c @@ -1,1830 +1,1849 @@ /* $KAME: traceroute6.c,v 1.68 2004/01/25 11:16:12 suz Exp $ */ /*- * SPDX-License-Identifier: BSD-3-Clause * * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. * All rights reserved. * * 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. Neither the name of the project 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 PROJECT 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 PROJECT 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. */ /*- * 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. 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. */ /* * 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 net.inet.ip.ttl 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), 64 hops max, 40 byte packets * 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), 64 hops max, 40 byte packets * 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 an 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@ee.lbl.gov) * Tue Dec 20 03:50:13 PST 1988 */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef HAVE_POLL #include #endif #include #include #include #include #include #include #include #include #include #include #include #ifdef IPSEC #include #include #endif #include "as.h" #define DUMMY_PORT 10010 #define MAXPACKET 65535 /* max ip packet size */ static u_char packet[512]; /* last inbound (icmp) packet */ static char *outpacket; /* last output packet */ int main(int, char *[]); int wait_for_reply(int, struct msghdr *); #if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC) int setpolicy(int so, char *policy); #endif void send_probe(int, u_long); void *get_uphdr(struct ip6_hdr *, u_char *); void capdns_open(void); int get_hoplim(struct msghdr *); double deltaT(struct timeval *, struct timeval *); const char *pr_type(int); int packet_ok(struct msghdr *, int, int, u_char *, u_char *, u_char *); void print(struct msghdr *, int); const char *inetname(struct sockaddr *); u_int32_t sctp_crc32c(void *, u_int32_t); u_int16_t in_cksum(u_int16_t *addr, int); u_int16_t udp_cksum(struct sockaddr_in6 *, struct sockaddr_in6 *, void *, u_int32_t); u_int16_t tcp_chksum(struct sockaddr_in6 *, struct sockaddr_in6 *, void *, u_int32_t); void usage(void); static int rcvsock; /* receive (icmp) socket file descriptor */ static int sndsock; /* send (raw/udp) socket file descriptor */ static struct msghdr rcvmhdr; static struct iovec rcviov[2]; static int rcvhlim; static struct in6_pktinfo *rcvpktinfo; static struct sockaddr_in6 Src, Dst, Rcv; static u_long datalen = 20; /* How much data */ #define ICMP6ECHOLEN 8 /* XXX: 2064 = 127(max hops in type 0 rthdr) * sizeof(ip6_hdr) + 16(margin) */ static char rtbuf[2064]; static struct ip6_rthdr *rth; static struct cmsghdr *cmsg; static char *source = NULL; static char *hostname; static cap_channel_t *capdns; static u_long nprobes = 3; static u_long first_hop = 1; static u_long max_hops = 30; static u_int16_t srcport; static u_int16_t port = 32768 + 666; /* start udp dest port # for probe packets */ static u_int16_t ident; static int tclass = -1; static int options; /* socket options */ static int verbose; static int waittime = 5; /* time to wait for response (in seconds) */ static int nflag; /* print addresses numerically */ static int useproto = IPPROTO_UDP; /* protocol to use to send packet */ static int as_path; /* print as numbers for each hop */ static int ecnflag; /* ECN bleaching detection flag */ static char *as_server = NULL; static void *asn; int main(int argc, char *argv[]) { int mib[4] = { CTL_NET, PF_INET6, IPPROTO_IPV6, IPV6CTL_DEFHLIM }; char hbuf[NI_MAXHOST], src0[NI_MAXHOST], *ep; int ch, i, on = 1, seq, rcvcmsglen, error; struct addrinfo hints, *res; static u_char *rcvcmsgbuf; u_long probe, hops, lport, ltclass; struct hostent *hp; size_t size, minlen; uid_t uid; u_char type, code, ecn; #if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC) char ipsec_inpolicy[] = "in bypass"; char ipsec_outpolicy[] = "out bypass"; #endif cap_rights_t rights; capdns_open(); /* * Receive ICMP */ if ((rcvsock = socket(AF_INET6, SOCK_RAW, IPPROTO_ICMPV6)) < 0) { perror("socket(ICMPv6)"); exit(5); } size = sizeof(i); (void) sysctl(mib, sizeof(mib) / sizeof(mib[0]), &i, &size, NULL, 0); max_hops = i; /* specify to tell receiving interface */ #ifdef IPV6_RECVPKTINFO if (setsockopt(rcvsock, IPPROTO_IPV6, IPV6_RECVPKTINFO, &on, sizeof(on)) < 0) err(1, "setsockopt(IPV6_RECVPKTINFO)"); #else /* old adv. API */ if (setsockopt(rcvsock, IPPROTO_IPV6, IPV6_PKTINFO, &on, sizeof(on)) < 0) err(1, "setsockopt(IPV6_PKTINFO)"); #endif /* specify to tell value of hoplimit field of received IP6 hdr */ #ifdef IPV6_RECVHOPLIMIT if (setsockopt(rcvsock, IPPROTO_IPV6, IPV6_RECVHOPLIMIT, &on, sizeof(on)) < 0) err(1, "setsockopt(IPV6_RECVHOPLIMIT)"); #else /* old adv. API */ if (setsockopt(rcvsock, IPPROTO_IPV6, IPV6_HOPLIMIT, &on, sizeof(on)) < 0) err(1, "setsockopt(IPV6_HOPLIMIT)"); #endif seq = 0; ident = htons(getpid() & 0xffff); /* same as ping6 */ while ((ch = getopt(argc, argv, "aA:dEf:g:Ilm:nNp:q:rs:St:TUvw:")) != -1) switch (ch) { case 'a': as_path = 1; break; case 'A': as_path = 1; as_server = optarg; break; case 'd': options |= SO_DEBUG; break; case 'E': ecnflag = 1; break; case 'f': ep = NULL; errno = 0; first_hop = strtoul(optarg, &ep, 0); if (errno || !*optarg || *ep || first_hop > 255) { fprintf(stderr, "traceroute6: invalid min hoplimit.\n"); exit(1); } break; case 'g': /* XXX use after capability mode is entered */ hp = getipnodebyname(optarg, AF_INET6, 0, &h_errno); if (hp == NULL) { fprintf(stderr, "traceroute6: unknown host %s\n", optarg); exit(1); } if (rth == NULL) { /* * XXX: We can't detect the number of * intermediate nodes yet. */ if ((rth = inet6_rth_init((void *)rtbuf, sizeof(rtbuf), IPV6_RTHDR_TYPE_0, 0)) == NULL) { fprintf(stderr, "inet6_rth_init failed.\n"); exit(1); } } if (inet6_rth_add((void *)rth, (struct in6_addr *)hp->h_addr)) { fprintf(stderr, "inet6_rth_add failed for %s\n", optarg); exit(1); } freehostent(hp); break; case 'I': useproto = IPPROTO_ICMPV6; break; case 'l': break; case 'm': ep = NULL; errno = 0; max_hops = strtoul(optarg, &ep, 0); if (errno || !*optarg || *ep || max_hops > 255) { fprintf(stderr, "traceroute6: invalid max hoplimit.\n"); exit(1); } break; case 'n': nflag++; break; case 'N': useproto = IPPROTO_NONE; break; case 'p': ep = NULL; errno = 0; lport = strtoul(optarg, &ep, 0); if (errno || !*optarg || *ep) { fprintf(stderr, "traceroute6: invalid port.\n"); exit(1); } if (lport == 0 || lport != (lport & 0xffff)) { fprintf(stderr, "traceroute6: port out of range.\n"); exit(1); } port = lport & 0xffff; break; case 'q': ep = NULL; errno = 0; nprobes = strtoul(optarg, &ep, 0); if (errno || !*optarg || *ep) { fprintf(stderr, "traceroute6: invalid nprobes.\n"); exit(1); } if (nprobes < 1) { fprintf(stderr, "traceroute6: 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 'S': useproto = IPPROTO_SCTP; break; case 't': ep = NULL; errno = 0; ltclass = strtoul(optarg, &ep, 0); if (errno || !*optarg || *ep || ltclass > 255) { fprintf(stderr, "traceroute6: invalid traffic class.\n"); exit(1); } tclass = (int)ltclass; break; case 'T': useproto = IPPROTO_TCP; break; case 'U': useproto = IPPROTO_UDP; break; case 'v': verbose++; break; case 'w': ep = NULL; errno = 0; waittime = strtoul(optarg, &ep, 0); if (errno || !*optarg || *ep) { fprintf(stderr, "traceroute6: invalid wait time.\n"); exit(1); } if (waittime < 1) { fprintf(stderr, "traceroute6: wait must be >= 1 sec.\n"); exit(1); } break; default: usage(); } argc -= optind; argv += optind; /* * Open socket to send probe packets. */ switch (useproto) { case IPPROTO_ICMPV6: case IPPROTO_NONE: case IPPROTO_SCTP: case IPPROTO_TCP: case IPPROTO_UDP: if ((sndsock = socket(AF_INET6, SOCK_RAW, useproto)) < 0) { perror("socket(SOCK_RAW)"); exit(5); } break; default: fprintf(stderr, "traceroute6: unknown probe protocol %d\n", useproto); exit(5); } if (max_hops < first_hop) { fprintf(stderr, "traceroute6: max hoplimit must be larger than first hoplimit.\n"); exit(1); } if (ecnflag) { if (tclass != -1) { tclass &= ~IPTOS_ECN_MASK; } else { tclass = 0; } tclass |= IPTOS_ECN_ECT1; } /* revoke privs */ uid = getuid(); if (setresuid(uid, uid, uid) == -1) { perror("setresuid"); exit(1); } if (tclass != -1) { if (setsockopt(sndsock, IPPROTO_IPV6, IPV6_TCLASS, &tclass, sizeof(int)) == -1) { perror("setsockopt(IPV6_TCLASS)"); exit(7); } } if (argc < 1 || argc > 2) usage(); #if 1 setvbuf(stdout, NULL, _IOLBF, BUFSIZ); #else setlinebuf(stdout); #endif memset(&hints, 0, sizeof(hints)); hints.ai_family = PF_INET6; hints.ai_socktype = SOCK_RAW; hints.ai_protocol = IPPROTO_ICMPV6; hints.ai_flags = AI_CANONNAME; error = cap_getaddrinfo(capdns, *argv, NULL, &hints, &res); if (error) { fprintf(stderr, "traceroute6: %s\n", gai_strerror(error)); exit(1); } if (res->ai_addrlen != sizeof(Dst)) { fprintf(stderr, "traceroute6: size of sockaddr mismatch\n"); exit(1); } memcpy(&Dst, res->ai_addr, res->ai_addrlen); hostname = res->ai_canonname ? strdup(res->ai_canonname) : *argv; if (!hostname) { fprintf(stderr, "traceroute6: not enough core\n"); exit(1); } if (res->ai_next) { if (cap_getnameinfo(capdns, res->ai_addr, res->ai_addrlen, hbuf, sizeof(hbuf), NULL, 0, NI_NUMERICHOST) != 0) strlcpy(hbuf, "?", sizeof(hbuf)); fprintf(stderr, "traceroute6: Warning: %s has multiple " "addresses; using %s\n", hostname, hbuf); } freeaddrinfo(res); if (*++argv) { ep = NULL; errno = 0; datalen = strtoul(*argv, &ep, 0); if (errno || *ep) { fprintf(stderr, "traceroute6: invalid packet length.\n"); exit(1); } } switch (useproto) { case IPPROTO_ICMPV6: minlen = ICMP6ECHOLEN; break; case IPPROTO_UDP: minlen = sizeof(struct udphdr); break; case IPPROTO_NONE: minlen = 0; datalen = 0; break; case IPPROTO_SCTP: minlen = sizeof(struct sctphdr); break; case IPPROTO_TCP: minlen = sizeof(struct tcphdr); break; default: fprintf(stderr, "traceroute6: unknown probe protocol %d.\n", useproto); exit(1); } if (datalen < minlen) datalen = minlen; else if (datalen >= MAXPACKET) { fprintf(stderr, "traceroute6: packet size must be %zu <= s < %d.\n", minlen, MAXPACKET); exit(1); } if ((useproto == IPPROTO_SCTP) && (datalen & 3)) { fprintf(stderr, "traceroute6: packet size must be a multiple of 4.\n"); exit(1); } outpacket = malloc(datalen); if (!outpacket) { perror("malloc"); exit(1); } (void) bzero((char *)outpacket, datalen); /* initialize msghdr for receiving packets */ rcviov[0].iov_base = (caddr_t)packet; rcviov[0].iov_len = sizeof(packet); rcvmhdr.msg_name = (caddr_t)&Rcv; rcvmhdr.msg_namelen = sizeof(Rcv); rcvmhdr.msg_iov = rcviov; rcvmhdr.msg_iovlen = 1; rcvcmsglen = CMSG_SPACE(sizeof(struct in6_pktinfo)) + CMSG_SPACE(sizeof(int)); if ((rcvcmsgbuf = malloc(rcvcmsglen)) == NULL) { fprintf(stderr, "traceroute6: malloc failed\n"); exit(1); } rcvmhdr.msg_control = (caddr_t) rcvcmsgbuf; rcvmhdr.msg_controllen = rcvcmsglen; if (options & SO_DEBUG) (void) setsockopt(rcvsock, SOL_SOCKET, SO_DEBUG, (char *)&on, sizeof(on)); if (options & SO_DONTROUTE) (void) setsockopt(rcvsock, SOL_SOCKET, SO_DONTROUTE, (char *)&on, sizeof(on)); #if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC) /* * do not raise error even if setsockopt fails, kernel may have ipsec * turned off. */ if (setpolicy(rcvsock, ipsec_inpolicy) < 0) errx(1, "%s", ipsec_strerror()); if (setpolicy(rcvsock, ipsec_outpolicy) < 0) errx(1, "%s", ipsec_strerror()); #else { int level = IPSEC_LEVEL_NONE; (void)setsockopt(rcvsock, IPPROTO_IPV6, IPV6_ESP_TRANS_LEVEL, &level, sizeof(level)); (void)setsockopt(rcvsock, IPPROTO_IPV6, IPV6_ESP_NETWORK_LEVEL, &level, sizeof(level)); #ifdef IP_AUTH_TRANS_LEVEL (void)setsockopt(rcvsock, IPPROTO_IPV6, IPV6_AUTH_TRANS_LEVEL, &level, sizeof(level)); #else (void)setsockopt(rcvsock, IPPROTO_IPV6, IPV6_AUTH_LEVEL, &level, sizeof(level)); #endif #ifdef IP_AUTH_NETWORK_LEVEL (void)setsockopt(rcvsock, IPPROTO_IPV6, IPV6_AUTH_NETWORK_LEVEL, &level, sizeof(level)); #endif } #endif /* !(IPSEC && IPSEC_POLICY_IPSEC) */ #ifdef SO_SNDBUF i = datalen; if (i == 0) i = 1; if (setsockopt(sndsock, SOL_SOCKET, SO_SNDBUF, (char *)&i, sizeof(i)) < 0) { perror("setsockopt(SO_SNDBUF)"); exit(6); } #endif /* SO_SNDBUF */ 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 (rth) {/* XXX: there is no library to finalize the header... */ rth->ip6r_len = rth->ip6r_segleft * 2; if (setsockopt(sndsock, IPPROTO_IPV6, IPV6_RTHDR, (void *)rth, (rth->ip6r_len + 1) << 3)) { fprintf(stderr, "setsockopt(IPV6_RTHDR): %s\n", strerror(errno)); exit(1); } } #if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC) /* * do not raise error even if setsockopt fails, kernel may have ipsec * turned off. */ if (setpolicy(sndsock, ipsec_inpolicy) < 0) errx(1, "%s", ipsec_strerror()); if (setpolicy(sndsock, ipsec_outpolicy) < 0) errx(1, "%s", ipsec_strerror()); #else { int level = IPSEC_LEVEL_BYPASS; (void)setsockopt(sndsock, IPPROTO_IPV6, IPV6_ESP_TRANS_LEVEL, &level, sizeof(level)); (void)setsockopt(sndsock, IPPROTO_IPV6, IPV6_ESP_NETWORK_LEVEL, &level, sizeof(level)); #ifdef IP_AUTH_TRANS_LEVEL (void)setsockopt(sndsock, IPPROTO_IPV6, IPV6_AUTH_TRANS_LEVEL, &level, sizeof(level)); #else (void)setsockopt(sndsock, IPPROTO_IPV6, IPV6_AUTH_LEVEL, &level, sizeof(level)); #endif #ifdef IP_AUTH_NETWORK_LEVEL (void)setsockopt(sndsock, IPPROTO_IPV6, IPV6_AUTH_NETWORK_LEVEL, &level, sizeof(level)); #endif } #endif /* !(IPSEC && IPSEC_POLICY_IPSEC) */ /* * Source selection */ bzero(&Src, sizeof(Src)); if (source) { memset(&hints, 0, sizeof(hints)); hints.ai_family = AF_INET6; hints.ai_socktype = SOCK_DGRAM; /*dummy*/ hints.ai_flags = AI_NUMERICHOST; error = cap_getaddrinfo(capdns, source, "0", &hints, &res); if (error) { printf("traceroute6: %s: %s\n", source, gai_strerror(error)); exit(1); } if (res->ai_addrlen > sizeof(Src)) { printf("traceroute6: %s: %s\n", source, gai_strerror(error)); exit(1); } memcpy(&Src, res->ai_addr, res->ai_addrlen); freeaddrinfo(res); } else { struct sockaddr_in6 Nxt; int dummy; socklen_t len; Nxt = Dst; Nxt.sin6_port = htons(DUMMY_PORT); if (cmsg != NULL) bcopy(inet6_rthdr_getaddr(cmsg, 1), &Nxt.sin6_addr, sizeof(Nxt.sin6_addr)); if ((dummy = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) { perror("socket"); exit(1); } if (connect(dummy, (struct sockaddr *)&Nxt, Nxt.sin6_len) < 0) { perror("connect"); exit(1); } len = sizeof(Src); if (getsockname(dummy, (struct sockaddr *)&Src, &len) < 0) { perror("getsockname"); exit(1); } if (cap_getnameinfo(capdns, (struct sockaddr *)&Src, Src.sin6_len, src0, sizeof(src0), NULL, 0, NI_NUMERICHOST)) { fprintf(stderr, "getnameinfo failed for source\n"); exit(1); } source = src0; close(dummy); } Src.sin6_port = htons(0); if (bind(sndsock, (struct sockaddr *)&Src, Src.sin6_len) < 0) { perror("bind"); exit(1); } { socklen_t len; len = sizeof(Src); if (getsockname(sndsock, (struct sockaddr *)&Src, &len) < 0) { perror("getsockname"); exit(1); } srcport = ntohs(Src.sin6_port); } if (as_path) { asn = as_setup(as_server); if (asn == NULL) { fprintf(stderr, "traceroute6: as_setup failed, AS# lookups" " disabled\n"); (void)fflush(stderr); as_path = 0; } } + if (as_path) + signal(SIGPIPE, SIG_IGN); /* * Message to users */ if (cap_getnameinfo(capdns, (struct sockaddr *)&Dst, Dst.sin6_len, hbuf, sizeof(hbuf), NULL, 0, NI_NUMERICHOST)) strlcpy(hbuf, "(invalid)", sizeof(hbuf)); fprintf(stderr, "traceroute6"); fprintf(stderr, " to %s (%s)", hostname, hbuf); if (source) fprintf(stderr, " from %s", source); fprintf(stderr, ", %lu hops max, %lu byte packets\n", max_hops, datalen + ((useproto == IPPROTO_UDP) ? sizeof(struct udphdr) : 0)); (void) fflush(stderr); if (first_hop > 1) printf("Skipping %lu intermediate hops\n", first_hop - 1); if (connect(sndsock, (struct sockaddr *)&Dst, sizeof(Dst)) != 0) { fprintf(stderr, "connect: %s\n", strerror(errno)); exit(1); } /* * Here we enter capability mode. Further down access to global * namespaces (e.g filesystem) is restricted (see capsicum(4)). * We must connect(2) our socket before this point. */ if (caph_enter_casper() < 0) { fprintf(stderr, "caph_enter_casper: %s\n", strerror(errno)); exit(1); } cap_rights_init(&rights, CAP_SEND, CAP_SETSOCKOPT); if (caph_rights_limit(sndsock, &rights) < 0) { fprintf(stderr, "caph_rights_limit sndsock: %s\n", strerror(errno)); exit(1); } cap_rights_init(&rights, CAP_RECV, CAP_EVENT); if (caph_rights_limit(rcvsock, &rights) < 0) { fprintf(stderr, "caph_rights_limit rcvsock: %s\n", strerror(errno)); exit(1); } /* * Main loop */ for (hops = first_hop; hops <= max_hops; ++hops) { struct in6_addr lastaddr; int got_there = 0; unsigned unreachable = 0; printf("%2lu ", hops); bzero(&lastaddr, sizeof(lastaddr)); for (probe = 0; probe < nprobes; ++probe) { int cc; struct timeval t1, t2; (void) gettimeofday(&t1, NULL); send_probe(++seq, hops); while ((cc = wait_for_reply(rcvsock, &rcvmhdr))) { (void) gettimeofday(&t2, NULL); if (packet_ok(&rcvmhdr, cc, seq, &type, &code, &ecn)) { if (!IN6_ARE_ADDR_EQUAL(&Rcv.sin6_addr, &lastaddr)) { if (probe > 0) fputs("\n ", stdout); print(&rcvmhdr, cc); lastaddr = Rcv.sin6_addr; } printf(" %.3f ms", deltaT(&t1, &t2)); if (ecnflag) { switch (ecn) { case IPTOS_ECN_ECT1: printf(" (ecn=passed)"); break; case IPTOS_ECN_NOTECT: printf(" (ecn=bleached)"); break; case IPTOS_ECN_CE: printf(" (ecn=congested)"); break; default: printf(" (ecn=mangled)"); break; } } if (type == ICMP6_DST_UNREACH) { switch (code) { case ICMP6_DST_UNREACH_NOROUTE: ++unreachable; printf(" !N"); break; case ICMP6_DST_UNREACH_ADMIN: ++unreachable; printf(" !P"); break; case ICMP6_DST_UNREACH_NOTNEIGHBOR: ++unreachable; printf(" !S"); break; case ICMP6_DST_UNREACH_ADDR: ++unreachable; printf(" !A"); break; case ICMP6_DST_UNREACH_NOPORT: if (rcvhlim >= 0 && rcvhlim <= 1) printf(" !"); ++got_there; break; default: ++unreachable; printf(" !<%d>", code & 0xff); break; } } else if (type == ICMP6_PARAM_PROB && code == ICMP6_PARAMPROB_NEXTHEADER) { printf(" !H"); ++got_there; } else if (type == ICMP6_ECHO_REPLY) { if (rcvhlim >= 0 && rcvhlim <= 1) printf(" !"); ++got_there; } break; } else if (deltaT(&t1, &t2) > waittime * 1000) { cc = 0; break; } } if (cc == 0) printf(" *"); (void) fflush(stdout); } putchar('\n'); if (got_there || (unreachable > 0 && unreachable >= ((nprobes + 1) / 2))) { exit(0); } } if (as_path) as_shutdown(asn); exit(0); } int wait_for_reply(int sock, struct msghdr *mhdr) { #ifdef HAVE_POLL struct pollfd pfd[1]; int cc = 0; pfd[0].fd = sock; pfd[0].events = POLLIN; pfd[0].revents = 0; if (poll(pfd, 1, waittime * 1000) > 0 && pfd[0].revents & POLLIN) cc = recvmsg(rcvsock, mhdr, 0); return (cc); #else fd_set *fdsp; struct timeval wait; int cc = 0, fdsn; fdsn = howmany(sock + 1, NFDBITS) * sizeof(fd_mask); if ((fdsp = (fd_set *)malloc(fdsn)) == NULL) err(1, "malloc"); memset(fdsp, 0, fdsn); FD_SET(sock, fdsp); wait.tv_sec = waittime; wait.tv_usec = 0; if (select(sock + 1, fdsp, (fd_set *)0, (fd_set *)0, &wait) > 0) cc = recvmsg(rcvsock, mhdr, 0); free(fdsp); return (cc); #endif } #if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC) int setpolicy(int so, char *policy) { char *buf; buf = ipsec_set_policy(policy, strlen(policy)); if (buf == NULL) { warnx("%s", ipsec_strerror()); return (-1); } (void)setsockopt(so, IPPROTO_IPV6, IPV6_IPSEC_POLICY, buf, ipsec_get_policylen(buf)); free(buf); return (0); } #endif void send_probe(int seq, u_long hops) { struct icmp6_hdr *icp; struct sctphdr *sctp; struct udphdr *outudp; struct sctp_chunkhdr *chk; struct sctp_init_chunk *init; struct sctp_paramhdr *param; struct tcphdr *tcp; int i; i = hops; if (setsockopt(sndsock, IPPROTO_IPV6, IPV6_UNICAST_HOPS, (char *)&i, sizeof(i)) < 0) { perror("setsockopt IPV6_UNICAST_HOPS"); } Dst.sin6_port = htons(port + seq); switch (useproto) { case IPPROTO_ICMPV6: icp = (struct icmp6_hdr *)outpacket; icp->icmp6_type = ICMP6_ECHO_REQUEST; icp->icmp6_code = 0; icp->icmp6_cksum = 0; icp->icmp6_id = ident; icp->icmp6_seq = htons(seq); break; case IPPROTO_UDP: outudp = (struct udphdr *) outpacket; outudp->uh_sport = htons(ident); outudp->uh_dport = htons(port + seq); outudp->uh_ulen = htons(datalen); outudp->uh_sum = 0; outudp->uh_sum = udp_cksum(&Src, &Dst, outpacket, datalen); break; case IPPROTO_NONE: /* No space for anything. No harm as seq/tv32 are decorative. */ break; case IPPROTO_SCTP: sctp = (struct sctphdr *)outpacket; sctp->src_port = htons(ident); sctp->dest_port = htons(port + seq); if (datalen >= (u_long)(sizeof(struct sctphdr) + sizeof(struct sctp_init_chunk))) { sctp->v_tag = 0; } else { sctp->v_tag = (sctp->src_port << 16) | sctp->dest_port; } sctp->checksum = htonl(0); if (datalen >= (u_long)(sizeof(struct sctphdr) + sizeof(struct sctp_init_chunk))) { /* * Send a packet containing an INIT chunk. This works * better in case of firewalls on the path, but * results in a probe packet containing at least * 32 bytes of payload. For shorter payloads, use * SHUTDOWN-ACK chunks. */ init = (struct sctp_init_chunk *)(sctp + 1); init->ch.chunk_type = SCTP_INITIATION; init->ch.chunk_flags = 0; init->ch.chunk_length = htons((u_int16_t)(datalen - sizeof(struct sctphdr))); init->init.initiate_tag = (sctp->src_port << 16) | sctp->dest_port; init->init.a_rwnd = htonl(1500); init->init.num_outbound_streams = htons(1); init->init.num_inbound_streams = htons(1); init->init.initial_tsn = htonl(0); if (datalen >= (u_long)(sizeof(struct sctphdr) + sizeof(struct sctp_init_chunk) + sizeof(struct sctp_paramhdr))) { param = (struct sctp_paramhdr *)(init + 1); param->param_type = htons(SCTP_PAD); param->param_length = htons((u_int16_t)(datalen - sizeof(struct sctphdr) - sizeof(struct sctp_init_chunk))); } } else { /* * Send a packet containing a SHUTDOWN-ACK chunk, * possibly followed by a PAD chunk. */ if (datalen >= (u_long)(sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr))) { chk = (struct sctp_chunkhdr *)(sctp + 1); chk->chunk_type = SCTP_SHUTDOWN_ACK; chk->chunk_flags = 0; chk->chunk_length = htons(4); } if (datalen >= (u_long)(sizeof(struct sctphdr) + 2 * sizeof(struct sctp_chunkhdr))) { chk = chk + 1; chk->chunk_type = SCTP_PAD_CHUNK; chk->chunk_flags = 0; chk->chunk_length = htons((u_int16_t)(datalen - sizeof(struct sctphdr) - sizeof(struct sctp_chunkhdr))); } } sctp->checksum = sctp_crc32c(outpacket, datalen); break; case IPPROTO_TCP: tcp = (struct tcphdr *)outpacket; tcp->th_sport = htons(ident); tcp->th_dport = htons(port + seq); tcp->th_seq = (tcp->th_sport << 16) | tcp->th_dport; tcp->th_ack = 0; tcp->th_off = 5; __tcp_set_flags(tcp, TH_SYN); tcp->th_sum = 0; tcp->th_sum = tcp_chksum(&Src, &Dst, outpacket, datalen); break; default: fprintf(stderr, "Unknown probe protocol %d.\n", useproto); exit(1); } i = send(sndsock, (char *)outpacket, datalen, 0); if (i < 0 || (u_long)i != datalen) { if (i < 0) perror("send"); printf("traceroute6: wrote %s %lu chars, ret=%d\n", hostname, datalen, i); (void) fflush(stdout); } } int get_hoplim(struct msghdr *mhdr) { struct cmsghdr *cm; for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm; cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) { if (cm->cmsg_level == IPPROTO_IPV6 && cm->cmsg_type == IPV6_HOPLIMIT && cm->cmsg_len == CMSG_LEN(sizeof(int))) return (*(int *)CMSG_DATA(cm)); } return (-1); } double deltaT(struct timeval *t1p, struct timeval *t2p) { 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. */ const char * pr_type(int t0) { u_char t = t0 & 0xff; const char *cp; switch (t) { case ICMP6_DST_UNREACH: cp = "Destination Unreachable"; break; case ICMP6_PACKET_TOO_BIG: cp = "Packet Too Big"; break; case ICMP6_TIME_EXCEEDED: cp = "Time Exceeded"; break; case ICMP6_PARAM_PROB: cp = "Parameter Problem"; break; case ICMP6_ECHO_REQUEST: cp = "Echo Request"; break; case ICMP6_ECHO_REPLY: cp = "Echo Reply"; break; case ICMP6_MEMBERSHIP_QUERY: cp = "Group Membership Query"; break; case ICMP6_MEMBERSHIP_REPORT: cp = "Group Membership Report"; break; case ICMP6_MEMBERSHIP_REDUCTION: cp = "Group Membership Reduction"; break; case ND_ROUTER_SOLICIT: cp = "Router Solicitation"; break; case ND_ROUTER_ADVERT: cp = "Router Advertisement"; break; case ND_NEIGHBOR_SOLICIT: cp = "Neighbor Solicitation"; break; case ND_NEIGHBOR_ADVERT: cp = "Neighbor Advertisement"; break; case ND_REDIRECT: cp = "Redirect"; break; default: cp = "Unknown"; break; } return (cp); } int packet_ok(struct msghdr *mhdr, int cc, int seq, u_char *type, u_char *code, u_char *ecn) { struct icmp6_hdr *icp; struct sockaddr_in6 *from = (struct sockaddr_in6 *)mhdr->msg_name; char *buf = (char *)mhdr->msg_iov[0].iov_base; struct cmsghdr *cm; int *hlimp; char hbuf[NI_MAXHOST]; #ifdef OLDRAWSOCKET int hlen; struct ip6_hdr *ip; #endif #ifdef OLDRAWSOCKET ip = (struct ip6_hdr *) buf; hlen = sizeof(struct ip6_hdr); if (cc < hlen + sizeof(struct icmp6_hdr)) { if (verbose) { if (cap_getnameinfo(capdns, (struct sockaddr *)from, from->sin6_len, hbuf, sizeof(hbuf), NULL, 0, NI_NUMERICHOST) != 0) strlcpy(hbuf, "invalid", sizeof(hbuf)); printf("packet too short (%d bytes) from %s\n", cc, hbuf); } return (0); } cc -= hlen; icp = (struct icmp6_hdr *)(buf + hlen); #else if (cc < (int)sizeof(struct icmp6_hdr)) { if (verbose) { if (cap_getnameinfo(capdns, (struct sockaddr *)from, from->sin6_len, hbuf, sizeof(hbuf), NULL, 0, NI_NUMERICHOST) != 0) strlcpy(hbuf, "invalid", sizeof(hbuf)); printf("data too short (%d bytes) from %s\n", cc, hbuf); } return (0); } icp = (struct icmp6_hdr *)buf; #endif /* get optional information via advanced API */ rcvpktinfo = NULL; hlimp = NULL; for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm; cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) { if (cm->cmsg_level == IPPROTO_IPV6 && cm->cmsg_type == IPV6_PKTINFO && cm->cmsg_len == CMSG_LEN(sizeof(struct in6_pktinfo))) rcvpktinfo = (struct in6_pktinfo *)(CMSG_DATA(cm)); if (cm->cmsg_level == IPPROTO_IPV6 && cm->cmsg_type == IPV6_HOPLIMIT && cm->cmsg_len == CMSG_LEN(sizeof(int))) hlimp = (int *)CMSG_DATA(cm); } if (rcvpktinfo == NULL || hlimp == NULL) { warnx("failed to get received hop limit or packet info"); #if 0 return (0); #else rcvhlim = 0; /*XXX*/ #endif } else rcvhlim = *hlimp; *type = icp->icmp6_type; *code = icp->icmp6_code; if ((*type == ICMP6_TIME_EXCEEDED && *code == ICMP6_TIME_EXCEED_TRANSIT) || (*type == ICMP6_DST_UNREACH) || (*type == ICMP6_PARAM_PROB && *code == ICMP6_PARAMPROB_NEXTHEADER)) { struct ip6_hdr *hip; struct icmp6_hdr *icmp; struct sctp_init_chunk *init; struct sctphdr *sctp; struct tcphdr *tcp; struct udphdr *udp; void *up; hip = (struct ip6_hdr *)(icp + 1); *ecn = ntohl(hip->ip6_flow & IPV6_ECN_MASK) >> 20; if ((up = get_uphdr(hip, (u_char *)(buf + cc))) == NULL) { if (verbose) warnx("failed to get upper layer header"); return (0); } switch (useproto) { case IPPROTO_ICMPV6: icmp = (struct icmp6_hdr *)up; if (icmp->icmp6_id == ident && icmp->icmp6_seq == htons(seq)) return (1); break; case IPPROTO_UDP: udp = (struct udphdr *)up; if (udp->uh_sport == htons(ident) && udp->uh_dport == htons(port + seq)) return (1); break; case IPPROTO_SCTP: sctp = (struct sctphdr *)up; if (sctp->src_port != htons(ident) || sctp->dest_port != htons(port + seq)) { break; } if (datalen >= (u_long)(sizeof(struct sctphdr) + sizeof(struct sctp_init_chunk))) { if (sctp->v_tag != 0) { break; } init = (struct sctp_init_chunk *)(sctp + 1); /* Check the initiate tag, if available. */ if ((char *)&init->init.a_rwnd > buf + cc) { return (1); } if (init->init.initiate_tag == (u_int32_t) ((sctp->src_port << 16) | sctp->dest_port)) { return (1); } } else { if (sctp->v_tag == (u_int32_t)((sctp->src_port << 16) | sctp->dest_port)) { return (1); } } break; case IPPROTO_TCP: tcp = (struct tcphdr *)up; if (tcp->th_sport == htons(ident) && tcp->th_dport == htons(port + seq) && tcp->th_seq == (tcp_seq)((tcp->th_sport << 16) | tcp->th_dport)) return (1); break; case IPPROTO_NONE: return (1); default: fprintf(stderr, "Unknown probe proto %d.\n", useproto); break; } } else if (useproto == IPPROTO_ICMPV6 && *type == ICMP6_ECHO_REPLY) { if (icp->icmp6_id == ident && icp->icmp6_seq == htons(seq)) return (1); } if (verbose) { char sbuf[NI_MAXHOST + 1], dbuf[INET6_ADDRSTRLEN]; u_int8_t *p; int i; if (cap_getnameinfo(capdns, (struct sockaddr *)from, from->sin6_len, sbuf, sizeof(sbuf), NULL, 0, NI_NUMERICHOST) != 0) strlcpy(sbuf, "invalid", sizeof(sbuf)); printf("\n%d bytes from %s to %s", cc, sbuf, rcvpktinfo ? inet_ntop(AF_INET6, &rcvpktinfo->ipi6_addr, dbuf, sizeof(dbuf)) : "?"); printf(": icmp type %d (%s) code %d\n", *type, pr_type(*type), *code); p = (u_int8_t *)(icp + 1); #define WIDTH 16 for (i = 0; i < cc; i++) { if (i % WIDTH == 0) printf("%04x:", i); if (i % 4 == 0) printf(" "); printf("%02x", p[i]); if (i % WIDTH == WIDTH - 1) printf("\n"); } if (cc % WIDTH != 0) printf("\n"); } return (0); } /* * Increment pointer until find the UDP or ICMP header. */ void * get_uphdr(struct ip6_hdr *ip6, u_char *lim) { u_char *cp = (u_char *)ip6, nh; int hlen; static u_char none_hdr[1]; /* Fake pointer for IPPROTO_NONE. */ if (cp + sizeof(*ip6) > lim) return (NULL); nh = ip6->ip6_nxt; cp += sizeof(struct ip6_hdr); while (lim - cp >= (nh == IPPROTO_NONE ? 0 : 8)) { switch (nh) { case IPPROTO_ESP: return (NULL); case IPPROTO_ICMPV6: return (useproto == nh ? cp : NULL); case IPPROTO_SCTP: case IPPROTO_TCP: case IPPROTO_UDP: return (useproto == nh ? cp : NULL); case IPPROTO_NONE: return (useproto == nh ? none_hdr : NULL); case IPPROTO_FRAGMENT: hlen = sizeof(struct ip6_frag); nh = ((struct ip6_frag *)cp)->ip6f_nxt; break; case IPPROTO_AH: hlen = (((struct ip6_ext *)cp)->ip6e_len + 2) << 2; nh = ((struct ip6_ext *)cp)->ip6e_nxt; break; default: hlen = (((struct ip6_ext *)cp)->ip6e_len + 1) << 3; nh = ((struct ip6_ext *)cp)->ip6e_nxt; break; } cp += hlen; } return (NULL); } void capdns_open(void) { #ifdef WITH_CASPER const char *types[] = { "NAME", "ADDR" }; int families[1]; cap_channel_t *casper; casper = cap_init(); if (casper == NULL) errx(1, "unable to create casper process"); capdns = cap_service_open(casper, "system.dns"); if (capdns == NULL) errx(1, "unable to open system.dns service"); if (cap_dns_type_limit(capdns, types, nitems(types)) < 0) errx(1, "unable to limit access to system.dns service"); families[0] = AF_INET6; if (cap_dns_family_limit(capdns, families, nitems(families)) < 0) errx(1, "unable to limit access to system.dns service"); cap_close(casper); #endif /* WITH_CASPER */ } void print(struct msghdr *mhdr, int cc) { struct sockaddr_in6 *from = (struct sockaddr_in6 *)mhdr->msg_name; + int as, status; char hbuf[NI_MAXHOST]; if (cap_getnameinfo(capdns, (struct sockaddr *)from, from->sin6_len, hbuf, sizeof(hbuf), NULL, 0, NI_NUMERICHOST) != 0) strlcpy(hbuf, "invalid", sizeof(hbuf)); - if (as_path) - printf(" [AS%u]", as_lookup(asn, hbuf, AF_INET6)); + while (as_path) { + as = as_lookup(asn, hbuf, AF_INET6, &status); + if (status) { + as_shutdown(asn); + asn = as_setup(as_server); + if (asn == NULL) { + fprintf(stderr, "traceroute6: as_setup failed, AS# lookups" + " disabled\n"); + (void)fflush(stderr); + as_path = 0; + break; + } + else + continue; + } + printf(" [AS%u]", as); + break; + } if (nflag) printf(" %s", hbuf); else printf(" %s (%s)", inetname((struct sockaddr *)from), hbuf); if (verbose) { #ifdef OLDRAWSOCKET printf(" %d bytes to %s", cc, rcvpktinfo ? inet_ntop(AF_INET6, &rcvpktinfo->ipi6_addr, hbuf, sizeof(hbuf)) : "?"); #else printf(" %d bytes of data to %s", cc, rcvpktinfo ? inet_ntop(AF_INET6, &rcvpktinfo->ipi6_addr, hbuf, sizeof(hbuf)) : "?"); #endif } } /* * Construct an Internet address representation. * If the nflag has been supplied, give * numeric value, otherwise try for symbolic name. */ const char * inetname(struct sockaddr *sa) { static char line[NI_MAXHOST], domain[MAXHOSTNAMELEN + 1]; static int first = 1; char *cp; if (first && !nflag) { first = 0; if (gethostname(domain, sizeof(domain)) == 0 && (cp = strchr(domain, '.'))) (void) strlcpy(domain, cp + 1, sizeof(domain)); else domain[0] = 0; } cp = NULL; if (!nflag) { if (cap_getnameinfo(capdns, sa, sa->sa_len, line, sizeof(line), NULL, 0, NI_NAMEREQD) == 0) { if ((cp = strchr(line, '.')) && !strcmp(cp + 1, domain)) *cp = 0; cp = line; } } if (cp) return (cp); if (cap_getnameinfo(capdns, sa, sa->sa_len, line, sizeof(line), NULL, 0, NI_NUMERICHOST) != 0) strlcpy(line, "invalid", sizeof(line)); return (line); } /* * CRC32C routine for the Stream Control Transmission Protocol */ #define CRC32C(c, d) (c = (c >> 8) ^ crc_c[(c ^ (d)) & 0xFF]) static u_int32_t crc_c[256] = { 0x00000000, 0xF26B8303, 0xE13B70F7, 0x1350F3F4, 0xC79A971F, 0x35F1141C, 0x26A1E7E8, 0xD4CA64EB, 0x8AD958CF, 0x78B2DBCC, 0x6BE22838, 0x9989AB3B, 0x4D43CFD0, 0xBF284CD3, 0xAC78BF27, 0x5E133C24, 0x105EC76F, 0xE235446C, 0xF165B798, 0x030E349B, 0xD7C45070, 0x25AFD373, 0x36FF2087, 0xC494A384, 0x9A879FA0, 0x68EC1CA3, 0x7BBCEF57, 0x89D76C54, 0x5D1D08BF, 0xAF768BBC, 0xBC267848, 0x4E4DFB4B, 0x20BD8EDE, 0xD2D60DDD, 0xC186FE29, 0x33ED7D2A, 0xE72719C1, 0x154C9AC2, 0x061C6936, 0xF477EA35, 0xAA64D611, 0x580F5512, 0x4B5FA6E6, 0xB93425E5, 0x6DFE410E, 0x9F95C20D, 0x8CC531F9, 0x7EAEB2FA, 0x30E349B1, 0xC288CAB2, 0xD1D83946, 0x23B3BA45, 0xF779DEAE, 0x05125DAD, 0x1642AE59, 0xE4292D5A, 0xBA3A117E, 0x4851927D, 0x5B016189, 0xA96AE28A, 0x7DA08661, 0x8FCB0562, 0x9C9BF696, 0x6EF07595, 0x417B1DBC, 0xB3109EBF, 0xA0406D4B, 0x522BEE48, 0x86E18AA3, 0x748A09A0, 0x67DAFA54, 0x95B17957, 0xCBA24573, 0x39C9C670, 0x2A993584, 0xD8F2B687, 0x0C38D26C, 0xFE53516F, 0xED03A29B, 0x1F682198, 0x5125DAD3, 0xA34E59D0, 0xB01EAA24, 0x42752927, 0x96BF4DCC, 0x64D4CECF, 0x77843D3B, 0x85EFBE38, 0xDBFC821C, 0x2997011F, 0x3AC7F2EB, 0xC8AC71E8, 0x1C661503, 0xEE0D9600, 0xFD5D65F4, 0x0F36E6F7, 0x61C69362, 0x93AD1061, 0x80FDE395, 0x72966096, 0xA65C047D, 0x5437877E, 0x4767748A, 0xB50CF789, 0xEB1FCBAD, 0x197448AE, 0x0A24BB5A, 0xF84F3859, 0x2C855CB2, 0xDEEEDFB1, 0xCDBE2C45, 0x3FD5AF46, 0x7198540D, 0x83F3D70E, 0x90A324FA, 0x62C8A7F9, 0xB602C312, 0x44694011, 0x5739B3E5, 0xA55230E6, 0xFB410CC2, 0x092A8FC1, 0x1A7A7C35, 0xE811FF36, 0x3CDB9BDD, 0xCEB018DE, 0xDDE0EB2A, 0x2F8B6829, 0x82F63B78, 0x709DB87B, 0x63CD4B8F, 0x91A6C88C, 0x456CAC67, 0xB7072F64, 0xA457DC90, 0x563C5F93, 0x082F63B7, 0xFA44E0B4, 0xE9141340, 0x1B7F9043, 0xCFB5F4A8, 0x3DDE77AB, 0x2E8E845F, 0xDCE5075C, 0x92A8FC17, 0x60C37F14, 0x73938CE0, 0x81F80FE3, 0x55326B08, 0xA759E80B, 0xB4091BFF, 0x466298FC, 0x1871A4D8, 0xEA1A27DB, 0xF94AD42F, 0x0B21572C, 0xDFEB33C7, 0x2D80B0C4, 0x3ED04330, 0xCCBBC033, 0xA24BB5A6, 0x502036A5, 0x4370C551, 0xB11B4652, 0x65D122B9, 0x97BAA1BA, 0x84EA524E, 0x7681D14D, 0x2892ED69, 0xDAF96E6A, 0xC9A99D9E, 0x3BC21E9D, 0xEF087A76, 0x1D63F975, 0x0E330A81, 0xFC588982, 0xB21572C9, 0x407EF1CA, 0x532E023E, 0xA145813D, 0x758FE5D6, 0x87E466D5, 0x94B49521, 0x66DF1622, 0x38CC2A06, 0xCAA7A905, 0xD9F75AF1, 0x2B9CD9F2, 0xFF56BD19, 0x0D3D3E1A, 0x1E6DCDEE, 0xEC064EED, 0xC38D26C4, 0x31E6A5C7, 0x22B65633, 0xD0DDD530, 0x0417B1DB, 0xF67C32D8, 0xE52CC12C, 0x1747422F, 0x49547E0B, 0xBB3FFD08, 0xA86F0EFC, 0x5A048DFF, 0x8ECEE914, 0x7CA56A17, 0x6FF599E3, 0x9D9E1AE0, 0xD3D3E1AB, 0x21B862A8, 0x32E8915C, 0xC083125F, 0x144976B4, 0xE622F5B7, 0xF5720643, 0x07198540, 0x590AB964, 0xAB613A67, 0xB831C993, 0x4A5A4A90, 0x9E902E7B, 0x6CFBAD78, 0x7FAB5E8C, 0x8DC0DD8F, 0xE330A81A, 0x115B2B19, 0x020BD8ED, 0xF0605BEE, 0x24AA3F05, 0xD6C1BC06, 0xC5914FF2, 0x37FACCF1, 0x69E9F0D5, 0x9B8273D6, 0x88D28022, 0x7AB90321, 0xAE7367CA, 0x5C18E4C9, 0x4F48173D, 0xBD23943E, 0xF36E6F75, 0x0105EC76, 0x12551F82, 0xE03E9C81, 0x34F4F86A, 0xC69F7B69, 0xD5CF889D, 0x27A40B9E, 0x79B737BA, 0x8BDCB4B9, 0x988C474D, 0x6AE7C44E, 0xBE2DA0A5, 0x4C4623A6, 0x5F16D052, 0xAD7D5351 }; u_int32_t sctp_crc32c(void *pack, u_int32_t len) { u_int32_t i, crc32c; u_int8_t byte0, byte1, byte2, byte3; u_int8_t *buf = (u_int8_t *)pack; crc32c = ~0; for (i = 0; i < len; i++) CRC32C(crc32c, buf[i]); crc32c = ~crc32c; byte0 = crc32c & 0xff; byte1 = (crc32c >> 8) & 0xff; byte2 = (crc32c >> 16) & 0xff; byte3 = (crc32c >> 24) & 0xff; crc32c = ((byte0 << 24) | (byte1 << 16) | (byte2 << 8) | byte3); return (htonl(crc32c)); } u_int16_t in_cksum(u_int16_t *addr, int len) { int nleft = len; u_int16_t *w = addr; u_int16_t answer; 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); } u_int16_t udp_cksum(struct sockaddr_in6 *src, struct sockaddr_in6 *dst, void *payload, u_int32_t len) { struct { struct in6_addr src; struct in6_addr dst; u_int32_t len; u_int8_t zero[3]; u_int8_t next; } pseudo_hdr; u_int16_t sum[2]; pseudo_hdr.src = src->sin6_addr; pseudo_hdr.dst = dst->sin6_addr; pseudo_hdr.len = htonl(len); pseudo_hdr.zero[0] = 0; pseudo_hdr.zero[1] = 0; pseudo_hdr.zero[2] = 0; pseudo_hdr.next = IPPROTO_UDP; sum[1] = in_cksum((u_int16_t *)&pseudo_hdr, sizeof(pseudo_hdr)); sum[0] = in_cksum(payload, len); return (~in_cksum(sum, sizeof(sum))); } u_int16_t tcp_chksum(struct sockaddr_in6 *src, struct sockaddr_in6 *dst, void *payload, u_int32_t len) { struct { struct in6_addr src; struct in6_addr dst; u_int32_t len; u_int8_t zero[3]; u_int8_t next; } pseudo_hdr; u_int16_t sum[2]; pseudo_hdr.src = src->sin6_addr; pseudo_hdr.dst = dst->sin6_addr; pseudo_hdr.len = htonl(len); pseudo_hdr.zero[0] = 0; pseudo_hdr.zero[1] = 0; pseudo_hdr.zero[2] = 0; pseudo_hdr.next = IPPROTO_TCP; sum[1] = in_cksum((u_int16_t *)&pseudo_hdr, sizeof(pseudo_hdr)); sum[0] = in_cksum(payload, len); return (~in_cksum(sum, sizeof(sum))); } void usage(void) { fprintf(stderr, "Usage: traceroute6 [-adEIlnNrSTUv] [-A as_server] [-f firsthop] [-g gateway]\n" "\t[-m hoplimit] [-p port] [-q probes] [-s src] [-t tclass]\n" "\t[-w waittime] target [datalen]\n"); exit(1); }