my last attempt to do this fetched info from bgpd, which is great for some things, but not so many people could use it.
this version uses cymru.com's dns based lookups instead (nicer than the various other traceroute implementations which do this using whois lookups, as of course this gets cached by the dns infrastructure). $ traceroute -A www.cymru.com traceroute to www.cymru.com (68.22.187.34), 64 hops max, 40 byte packets 1 jodrell (85.158.44.145) [AS3213] 0.417 ms 0.405 ms 0.356 ms 2 ar0.rbsov.bogons.net (193.178.223.245) [AS3213] 264.111 ms 282.787 ms 298.318 ms 3 cr0-Vl456.rbsov.bogons.net (194.39.143.145) [AS3213] 13.201 ms 13.52 ms 13.98 ms 4 tge1-4.fr3.lon.llnw.net (195.66.224.133) [AS10310, AS5459] 13.351 ms 13.407 ms 24.104 ms 5 tge7-2.fr3.lga.llnw.net (69.28.171.125) [AS22822] 81.68 ms 92.952 ms 90.74 ms 6 tge13-1.fr3.ord.llnw.net (68.142.125.45) [AS22822] 111.914 ms tge8-4.fr3.ord.llnw.net (69.28.171.193) [AS22822] 107.509 ms 117.249 ms 7 ve8.fr3.ord4.llnw.net (68.142.80.130) [AS22822] 108.281 ms 117.217 ms 113.301 ms 8 cymru.tge6-3.fr3.ord4.llnw.net (68.142.73.198) [AS22822] 105.921 ms 103.310 ms 103.68 ms 9 va06.ord08.cymru.com (38.229.35.4) [AS23028] 107.156 ms 106.876 ms 103.517 ms 10 serv27.ord01.cymru.com (68.22.187.34) [AS23028] 103.435 ms 106.849 ms 106.439 ms note there are some addresses (like hop 4 above) which return multiple entries (see http://www.team-cymru.org/Services/ip-to-asn.html for info), currently the code just lists all of them and doesn't dedup. $ dig +short 133.224.66.195.origin.asn.cymru.com txt "10310 | 195.66.224.0/23 | GB | ripencc | 1997-12-01" "5459 | 195.66.224.0/19 | GB | ripencc | 1997-12-01" $ dig +short 241.92.52.72.origin.asn.cymru.com txt "6939 | 72.52.92.0/24 | US | arin | 2006-08-04" "6939 | 72.52.64.0/18 | US | arin | 2006-08-04" Index: traceroute.c =================================================================== RCS file: /cvs/src/usr.sbin/traceroute/traceroute.c,v retrieving revision 1.78 diff -u -p -r1.78 traceroute.c --- traceroute.c 17 Sep 2011 14:10:05 -0000 1.78 +++ traceroute.c 3 Nov 2011 00:32:05 -0000 @@ -219,6 +219,7 @@ #include <netinet/udp.h> #include <arpa/inet.h> +#include <arpa/nameser.h> #include <netmpls/mpls.h> @@ -260,6 +261,7 @@ int packet_ok(u_char *, int, struct sock void print_exthdr(u_char *, int); void print(u_char *, int, struct sockaddr_in *); char *inetname(struct in_addr); +void print_asn(struct in_addr); u_short in_cksum(u_short *, int); int map_tos(char *, int *); void usage(void); @@ -288,6 +290,7 @@ int nflag; /* print addresses numerica int dump; int xflag; /* show ICMP extension header */ int tflag; /* tos flag was set */ +int Aflag; /* lookup ASN */ int main(int argc, char *argv[]) @@ -322,12 +325,15 @@ main(int argc, char *argv[]) (void) sysctl(mib, sizeof(mib)/sizeof(mib[0]), &max_ttl, &size, NULL, 0); - while ((ch = getopt(argc, argv, "cDdf:g:Ilm:nP:p:q:rSs:t:V:vw:x")) + while ((ch = getopt(argc, argv, "AcDdf:g:Ilm:nP:p:q:rSs:t:V:vw:x")) != -1) switch (ch) { case 'S': sump = 1; break; + case 'A': + Aflag++; + break; case 'f': errno = 0; ep = NULL; @@ -1113,6 +1119,8 @@ print(u_char *buf, int cc, struct sockad else printf(" %s (%s)", inetname(from->sin_addr), inet_ntoa(from->sin_addr)); + if (Aflag) + print_asn(from->sin_addr); if (verbose) printf(" %d bytes to %s", cc, inet_ntoa(ip->ip_dst)); @@ -1183,6 +1191,35 @@ inetname(struct in_addr in) return (inet_ntoa(in)); } +void +print_asn(struct in_addr in) +{ + const u_char *uaddr = (const u_char *)&in.s_addr; + int n, i, counter; + struct rrsetinfo *answers = NULL; + char qbuf[MAXDNAME+1]; + + (void) snprintf(qbuf, sizeof qbuf, "%u.%u.%u.%u.origin.asn.cymru.com", + (uaddr[3] & 0xff), (uaddr[2] & 0xff), + (uaddr[1] & 0xff), (uaddr[0] & 0xff)); + if (n = getrrsetbyname(qbuf, C_IN, T_TXT, 0, &answers)) + return; + for (counter = 0; counter < answers->rri_nrdatas; counter++) { + char *p, *as = answers->rri_rdatas[counter].rdi_data; + as++; /* skip first byte, it contains length */ + if (p = strchr(as,'|')) { + printf(counter ? ", " : " ["); + p[-1] = 0; + printf("AS%s", as); + } + } + if (counter) + printf("]"); + + freerrset(answers); + return; +} + int map_tos(char *s, int *val) { @@ -1237,7 +1274,7 @@ usage(void) extern char *__progname; fprintf(stderr, - "usage: %s [-cDdIlnrSvx] [-f first_ttl] [-g gateway_addr] [-m max_ttl]\n" + "usage: %s [-AcDdIlnrSvx] [-f first_ttl] [-g gateway_addr] [-m max_ttl]\n" "\t[-P proto] [-p port] [-q nqueries] [-s src_addr] [-t toskeyword]\n" "\t[-V rtable] [-w waittime] host [packetsize]\n", __progname); exit(1);
