Eric Andersen | 5c58d28 | 2001-07-10 16:29:00 +0000 | [diff] [blame] | 1 | /*- |
| 2 | * Copyright (c) 1990, 1993 |
| 3 | * The Regents of the University of California. All rights reserved. |
| 4 | * |
| 5 | * This code is derived from software contributed to Berkeley by |
| 6 | * Van Jacobson. |
| 7 | * |
Eric Andersen | 7467c8d | 2001-07-12 20:26:32 +0000 | [diff] [blame] | 8 | * Special for busybox ported by Vladimir Oleynik <dzo@simtreas.ru> 2001 |
Eric Andersen | 5c58d28 | 2001-07-10 16:29:00 +0000 | [diff] [blame] | 9 | * Redistribution and use in source and binary forms, with or without |
| 10 | * modification, are permitted provided that the following conditions |
| 11 | * are met: |
| 12 | * 1. Redistributions of source code must retain the above copyright |
| 13 | * notice, this list of conditions and the following disclaimer. |
| 14 | * 2. Redistributions in binary form must reproduce the above copyright |
| 15 | * notice, this list of conditions and the following disclaimer in the |
| 16 | * documentation and/or other materials provided with the distribution. |
Aaron Lehmann | 69d4178 | 2002-06-23 22:25:24 +0000 | [diff] [blame] | 17 | * 3. Neither the name of the University nor the names of its contributors |
Eric Andersen | 5c58d28 | 2001-07-10 16:29:00 +0000 | [diff] [blame] | 18 | * may be used to endorse or promote products derived from this software |
| 19 | * without specific prior written permission. |
| 20 | * |
| 21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 31 | * SUCH DAMAGE. |
| 32 | */ |
| 33 | |
| 34 | /* |
| 35 | * traceroute host - trace the route ip packets follow going to "host". |
| 36 | * Notes |
| 37 | * ----- |
| 38 | * This program must be run by root or be setuid. (I suggest that |
| 39 | * you *don't* make it setuid -- casual use could result in a lot |
| 40 | * of unnecessary traffic on our poor, congested nets.) |
| 41 | * |
| 42 | * I stole the idea for this program from Steve Deering. Since |
| 43 | * the first release, I've learned that had I attended the right |
| 44 | * IETF working group meetings, I also could have stolen it from Guy |
| 45 | * Almes or Matt Mathis. I don't know (or care) who came up with |
| 46 | * the idea first. I envy the originators' perspicacity and I'm |
| 47 | * glad they didn't keep the idea a secret. |
| 48 | * |
| 49 | * Tim Seaver, Ken Adelman and C. Philip Wood provided bug fixes and/or |
| 50 | * enhancements to the original distribution. |
| 51 | * |
| 52 | * I've hacked up a round-trip-route version of this that works by |
| 53 | * sending a loose-source-routed udp datagram through the destination |
| 54 | * back to yourself. Unfortunately, SO many gateways botch source |
| 55 | * routing, the thing is almost worthless. Maybe one day... |
| 56 | * |
| 57 | * -- Van Jacobson (van@helios.ee.lbl.gov) |
| 58 | * Tue Dec 20 03:50:13 PST 1988 |
| 59 | */ |
| 60 | |
Eric Andersen | bdfd0d7 | 2001-10-24 05:00:29 +0000 | [diff] [blame] | 61 | #undef CONFIG_FEATURE_TRACEROUTE_VERBOSE |
| 62 | //#define CONFIG_FEATURE_TRACEROUTE_VERBOSE |
| 63 | #undef CONFIG_FEATURE_TRACEROUTE_SO_DEBUG /* not in documentation man */ |
Eric Andersen | 7467c8d | 2001-07-12 20:26:32 +0000 | [diff] [blame] | 64 | |
Eric Andersen | 5c58d28 | 2001-07-10 16:29:00 +0000 | [diff] [blame] | 65 | #include <stdio.h> |
| 66 | #include <errno.h> |
| 67 | #include <stdlib.h> |
| 68 | #include <string.h> |
| 69 | #include <unistd.h> |
| 70 | #include <sys/time.h> |
Eric Andersen | cd8c436 | 2001-11-10 11:22:46 +0000 | [diff] [blame] | 71 | #include "inet_common.h" |
Eric Andersen | 5c58d28 | 2001-07-10 16:29:00 +0000 | [diff] [blame] | 72 | #include <netdb.h> |
| 73 | #include <endian.h> |
Eric Andersen | 5c58d28 | 2001-07-10 16:29:00 +0000 | [diff] [blame] | 74 | #include <netinet/udp.h> |
| 75 | #include <netinet/ip.h> |
| 76 | #include <netinet/ip_icmp.h> |
| 77 | |
Eric Andersen | c7bda1c | 2004-03-15 08:29:22 +0000 | [diff] [blame] | 78 | |
Eric Andersen | 5c58d28 | 2001-07-10 16:29:00 +0000 | [diff] [blame] | 79 | #define MAXPACKET 65535 /* max ip packet size */ |
| 80 | #ifndef MAXHOSTNAMELEN |
| 81 | #define MAXHOSTNAMELEN 64 |
| 82 | #endif |
| 83 | |
| 84 | /* |
| 85 | * format of a (udp) probe packet. |
| 86 | */ |
| 87 | struct opacket { |
| 88 | struct ip ip; |
| 89 | struct udphdr udp; |
| 90 | u_char seq; /* sequence number of this packet */ |
| 91 | u_char ttl; /* ttl packet left with */ |
| 92 | struct timeval tv; /* time packet left */ |
| 93 | }; |
| 94 | |
| 95 | /* |
| 96 | * Definitions for internet protocol version 4. |
| 97 | * Per RFC 791, September 1981. |
| 98 | */ |
| 99 | #define IPVERSION 4 |
| 100 | |
| 101 | |
| 102 | #include "busybox.h" |
| 103 | |
Paul Fox | 2806940 | 2005-07-20 11:55:08 +0000 | [diff] [blame] | 104 | /* last inbound (icmp) packet */ |
| 105 | static u_char packet[512] __attribute__ ((aligned)); |
Eric Andersen | 5c58d28 | 2001-07-10 16:29:00 +0000 | [diff] [blame] | 106 | static struct opacket *outpacket; /* last output (udp) packet */ |
| 107 | |
| 108 | static int s; /* receive (icmp) socket file descriptor */ |
| 109 | static int sndsock; /* send (udp) socket file descriptor */ |
| 110 | |
| 111 | static struct sockaddr whereto; /* Who to try to reach */ |
| 112 | static int datalen; /* How much data */ |
| 113 | |
| 114 | static char *hostname; |
| 115 | |
| 116 | static int max_ttl = 30; |
| 117 | static u_short ident; |
| 118 | static u_short port = 32768+666; /* start udp dest port # for probe packets */ |
| 119 | |
Eric Andersen | bdfd0d7 | 2001-10-24 05:00:29 +0000 | [diff] [blame] | 120 | #ifdef CONFIG_FEATURE_TRACEROUTE_VERBOSE |
Eric Andersen | 5c58d28 | 2001-07-10 16:29:00 +0000 | [diff] [blame] | 121 | static int verbose; |
Eric Andersen | 7467c8d | 2001-07-12 20:26:32 +0000 | [diff] [blame] | 122 | #endif |
Eric Andersen | 5c58d28 | 2001-07-10 16:29:00 +0000 | [diff] [blame] | 123 | static int waittime = 5; /* time to wait for response (in seconds) */ |
| 124 | static int nflag; /* print addresses numerically */ |
| 125 | |
Eric Andersen | 7467c8d | 2001-07-12 20:26:32 +0000 | [diff] [blame] | 126 | /* |
| 127 | * Construct an Internet address representation. |
| 128 | * If the nflag has been supplied, give |
| 129 | * numeric value, otherwise try for symbolic name. |
| 130 | */ |
Eric Andersen | 044228d | 2001-07-17 01:12:36 +0000 | [diff] [blame] | 131 | static inline void |
| 132 | inetname(struct sockaddr_in *from) |
Eric Andersen | 7467c8d | 2001-07-12 20:26:32 +0000 | [diff] [blame] | 133 | { |
| 134 | char *cp; |
Eric Andersen | 7467c8d | 2001-07-12 20:26:32 +0000 | [diff] [blame] | 135 | static char domain[MAXHOSTNAMELEN + 1]; |
Eric Andersen | cd8c436 | 2001-11-10 11:22:46 +0000 | [diff] [blame] | 136 | char name[MAXHOSTNAMELEN + 1]; |
Eric Andersen | 7467c8d | 2001-07-12 20:26:32 +0000 | [diff] [blame] | 137 | static int first = 1; |
Eric Andersen | 044228d | 2001-07-17 01:12:36 +0000 | [diff] [blame] | 138 | const char *ina; |
Eric Andersen | 7467c8d | 2001-07-12 20:26:32 +0000 | [diff] [blame] | 139 | |
| 140 | if (first && !nflag) { |
| 141 | first = 0; |
Eric Andersen | ad79c0b | 2002-06-06 12:24:51 +0000 | [diff] [blame] | 142 | if (getdomainname(domain, MAXHOSTNAMELEN) != 0) |
Eric Andersen | 7467c8d | 2001-07-12 20:26:32 +0000 | [diff] [blame] | 143 | domain[0] = 0; |
| 144 | } |
| 145 | cp = 0; |
Eric Andersen | 044228d | 2001-07-17 01:12:36 +0000 | [diff] [blame] | 146 | if (!nflag && from->sin_addr.s_addr != INADDR_ANY) { |
Eric Andersen | ad79c0b | 2002-06-06 12:24:51 +0000 | [diff] [blame] | 147 | if(INET_rresolve(name, sizeof(name), from, 0x4000, 0xffffffff) >= 0) { |
Eric Andersen | cd8c436 | 2001-11-10 11:22:46 +0000 | [diff] [blame] | 148 | if ((cp = strchr(name, '.')) && |
Eric Andersen | 7467c8d | 2001-07-12 20:26:32 +0000 | [diff] [blame] | 149 | !strcmp(cp + 1, domain)) |
| 150 | *cp = 0; |
Eric Andersen | cd8c436 | 2001-11-10 11:22:46 +0000 | [diff] [blame] | 151 | cp = (char *)name; |
Eric Andersen | 7467c8d | 2001-07-12 20:26:32 +0000 | [diff] [blame] | 152 | } |
| 153 | } |
Eric Andersen | 044228d | 2001-07-17 01:12:36 +0000 | [diff] [blame] | 154 | ina = inet_ntoa(from->sin_addr); |
| 155 | if (nflag) |
| 156 | printf(" %s", ina); |
| 157 | else |
| 158 | printf(" %s (%s)", (cp ? cp : ina), ina); |
Eric Andersen | 7467c8d | 2001-07-12 20:26:32 +0000 | [diff] [blame] | 159 | } |
| 160 | |
| 161 | static inline void |
| 162 | print(u_char *buf, int cc, struct sockaddr_in *from) |
| 163 | { |
| 164 | struct ip *ip; |
| 165 | int hlen; |
| 166 | |
| 167 | ip = (struct ip *) buf; |
| 168 | hlen = ip->ip_hl << 2; |
| 169 | cc -= hlen; |
| 170 | |
Eric Andersen | 044228d | 2001-07-17 01:12:36 +0000 | [diff] [blame] | 171 | inetname(from); |
Eric Andersen | bdfd0d7 | 2001-10-24 05:00:29 +0000 | [diff] [blame] | 172 | #ifdef CONFIG_FEATURE_TRACEROUTE_VERBOSE |
Eric Andersen | 7467c8d | 2001-07-12 20:26:32 +0000 | [diff] [blame] | 173 | if (verbose) |
| 174 | printf (" %d bytes to %s", cc, inet_ntoa (ip->ip_dst)); |
| 175 | #endif |
| 176 | } |
| 177 | |
| 178 | static inline double |
| 179 | deltaT(struct timeval *t1p, struct timeval *t2p) |
| 180 | { |
| 181 | double dt; |
| 182 | |
| 183 | dt = (double)(t2p->tv_sec - t1p->tv_sec) * 1000.0 + |
| 184 | (double)(t2p->tv_usec - t1p->tv_usec) / 1000.0; |
| 185 | return (dt); |
| 186 | } |
| 187 | |
| 188 | static inline int |
Paul Fox | 2806940 | 2005-07-20 11:55:08 +0000 | [diff] [blame] | 189 | wait_for_reply(int sock, struct sockaddr_in *from, int reset_timer) |
Eric Andersen | 7467c8d | 2001-07-12 20:26:32 +0000 | [diff] [blame] | 190 | { |
| 191 | fd_set fds; |
| 192 | static struct timeval wait; |
| 193 | int cc = 0; |
| 194 | int fromlen = sizeof (*from); |
| 195 | |
| 196 | FD_ZERO(&fds); |
| 197 | FD_SET(sock, &fds); |
| 198 | if (reset_timer) { |
| 199 | /* |
| 200 | * traceroute could hang if someone else has a ping |
| 201 | * running and our ICMP reply gets dropped but we don't |
| 202 | * realize it because we keep waking up to handle those |
| 203 | * other ICMP packets that keep coming in. To fix this, |
| 204 | * "reset_timer" will only be true if the last packet that |
| 205 | * came in was for us or if this is the first time we're |
| 206 | * waiting for a reply since sending out a probe. Note |
| 207 | * that this takes advantage of the select() feature on |
| 208 | * Linux where the remaining timeout is written to the |
| 209 | * struct timeval area. |
| 210 | */ |
| 211 | wait.tv_sec = waittime; |
| 212 | wait.tv_usec = 0; |
| 213 | } |
| 214 | |
| 215 | if (select(sock+1, &fds, (fd_set *)0, (fd_set *)0, &wait) > 0) |
Paul Fox | 2806940 | 2005-07-20 11:55:08 +0000 | [diff] [blame] | 216 | cc=recvfrom(s, (char *)packet, sizeof(packet), 0, |
Eric Andersen | 7467c8d | 2001-07-12 20:26:32 +0000 | [diff] [blame] | 217 | (struct sockaddr *)from, &fromlen); |
| 218 | |
| 219 | return(cc); |
| 220 | } |
| 221 | |
Eric Andersen | bdfd0d7 | 2001-10-24 05:00:29 +0000 | [diff] [blame] | 222 | #ifdef CONFIG_FEATURE_TRACEROUTE_VERBOSE |
Eric Andersen | 7467c8d | 2001-07-12 20:26:32 +0000 | [diff] [blame] | 223 | /* |
| 224 | * Convert an ICMP "type" field to a printable string. |
| 225 | */ |
| 226 | static inline const char * |
Eric Andersen | ad79c0b | 2002-06-06 12:24:51 +0000 | [diff] [blame] | 227 | pr_type(u_char t) |
Eric Andersen | 7467c8d | 2001-07-12 20:26:32 +0000 | [diff] [blame] | 228 | { |
| 229 | static const char * const ttab[] = { |
| 230 | "Echo Reply", "ICMP 1", "ICMP 2", "Dest Unreachable", |
| 231 | "Source Quench", "Redirect", "ICMP 6", "ICMP 7", |
| 232 | "Echo", "ICMP 9", "ICMP 10", "Time Exceeded", |
| 233 | "Param Problem", "Timestamp", "Timestamp Reply", "Info Request", |
| 234 | "Info Reply" |
| 235 | }; |
| 236 | |
| 237 | if(t > 16) |
| 238 | return("OUT-OF-RANGE"); |
| 239 | |
| 240 | return(ttab[t]); |
| 241 | } |
| 242 | #endif |
| 243 | |
| 244 | static inline int |
| 245 | packet_ok(u_char *buf, int cc, struct sockaddr_in *from, int seq) |
| 246 | { |
| 247 | struct icmp *icp; |
| 248 | u_char type, code; |
| 249 | int hlen; |
| 250 | struct ip *ip; |
| 251 | |
| 252 | ip = (struct ip *) buf; |
| 253 | hlen = ip->ip_hl << 2; |
| 254 | if (cc < hlen + ICMP_MINLEN) { |
Eric Andersen | bdfd0d7 | 2001-10-24 05:00:29 +0000 | [diff] [blame] | 255 | #ifdef CONFIG_FEATURE_TRACEROUTE_VERBOSE |
Eric Andersen | 7467c8d | 2001-07-12 20:26:32 +0000 | [diff] [blame] | 256 | if (verbose) |
| 257 | printf("packet too short (%d bytes) from %s\n", cc, |
| 258 | inet_ntoa(from->sin_addr)); |
| 259 | #endif |
| 260 | return (0); |
| 261 | } |
| 262 | cc -= hlen; |
| 263 | icp = (struct icmp *)(buf + hlen); |
| 264 | type = icp->icmp_type; code = icp->icmp_code; |
| 265 | if ((type == ICMP_TIMXCEED && code == ICMP_TIMXCEED_INTRANS) || |
| 266 | type == ICMP_UNREACH) { |
| 267 | struct ip *hip; |
| 268 | struct udphdr *up; |
| 269 | |
| 270 | hip = &icp->icmp_ip; |
| 271 | hlen = hip->ip_hl << 2; |
| 272 | up = (struct udphdr *)((u_char *)hip + hlen); |
| 273 | if (hlen + 12 <= cc && hip->ip_p == IPPROTO_UDP && |
| 274 | up->source == htons(ident) && |
| 275 | up->dest == htons(port+seq)) |
| 276 | return (type == ICMP_TIMXCEED? -1 : code+1); |
| 277 | } |
Eric Andersen | bdfd0d7 | 2001-10-24 05:00:29 +0000 | [diff] [blame] | 278 | #ifdef CONFIG_FEATURE_TRACEROUTE_VERBOSE |
Eric Andersen | 7467c8d | 2001-07-12 20:26:32 +0000 | [diff] [blame] | 279 | if (verbose) { |
| 280 | int i; |
| 281 | u_long *lp = (u_long *)&icp->icmp_ip; |
| 282 | |
| 283 | printf("\n%d bytes from %s to %s: icmp type %d (%s) code %d\n", |
| 284 | cc, inet_ntoa(from->sin_addr), inet_ntoa(ip->ip_dst), |
| 285 | type, pr_type(type), icp->icmp_code); |
| 286 | for (i = 4; i < cc ; i += sizeof(long)) |
| 287 | printf("%2d: x%8.8lx\n", i, *lp++); |
| 288 | } |
| 289 | #endif |
| 290 | return(0); |
| 291 | } |
| 292 | |
| 293 | static void /* not inline */ |
| 294 | send_probe(int seq, int ttl) |
| 295 | { |
| 296 | struct opacket *op = outpacket; |
| 297 | struct ip *ip = &op->ip; |
| 298 | struct udphdr *up = &op->udp; |
| 299 | int i; |
| 300 | struct timezone tz; |
| 301 | |
| 302 | ip->ip_off = 0; |
| 303 | ip->ip_hl = sizeof(*ip) >> 2; |
| 304 | ip->ip_p = IPPROTO_UDP; |
| 305 | ip->ip_len = datalen; |
| 306 | ip->ip_ttl = ttl; |
| 307 | ip->ip_v = IPVERSION; |
| 308 | ip->ip_id = htons(ident+seq); |
| 309 | |
| 310 | up->source = htons(ident); |
| 311 | up->dest = htons(port+seq); |
| 312 | up->len = htons((u_short)(datalen - sizeof(struct ip))); |
| 313 | up->check = 0; |
| 314 | |
| 315 | op->seq = seq; |
| 316 | op->ttl = ttl; |
| 317 | (void) gettimeofday(&op->tv, &tz); |
| 318 | |
| 319 | i = sendto(sndsock, (char *)outpacket, datalen, 0, &whereto, |
| 320 | sizeof(struct sockaddr)); |
| 321 | if (i < 0 || i != datalen) { |
| 322 | if (i<0) |
| 323 | perror("sendto"); |
| 324 | printf("traceroute: wrote %s %d chars, ret=%d\n", hostname, |
| 325 | datalen, i); |
| 326 | (void) fflush(stdout); |
| 327 | } |
| 328 | } |
| 329 | |
| 330 | |
Eric Andersen | 5c58d28 | 2001-07-10 16:29:00 +0000 | [diff] [blame] | 331 | int |
Eric Andersen | bdfd0d7 | 2001-10-24 05:00:29 +0000 | [diff] [blame] | 332 | #ifndef CONFIG_TRACEROUTE |
Aaron Lehmann | 7dd2cec | 2002-08-23 07:52:58 +0000 | [diff] [blame] | 333 | main(int argc, char *argv[]) |
Eric Andersen | 5c58d28 | 2001-07-10 16:29:00 +0000 | [diff] [blame] | 334 | #else |
Aaron Lehmann | 7dd2cec | 2002-08-23 07:52:58 +0000 | [diff] [blame] | 335 | traceroute_main(int argc, char *argv[]) |
Eric Andersen | 5c58d28 | 2001-07-10 16:29:00 +0000 | [diff] [blame] | 336 | #endif |
Eric Andersen | 5c58d28 | 2001-07-10 16:29:00 +0000 | [diff] [blame] | 337 | { |
| 338 | extern char *optarg; |
| 339 | extern int optind; |
| 340 | struct hostent *hp; |
Eric Andersen | 5c58d28 | 2001-07-10 16:29:00 +0000 | [diff] [blame] | 341 | struct sockaddr_in from, *to; |
| 342 | int ch, i, on, probe, seq, tos, ttl; |
| 343 | |
| 344 | int options = 0; /* socket options */ |
| 345 | char *source = 0; |
| 346 | int nprobes = 3; |
| 347 | |
| 348 | on = 1; |
| 349 | seq = tos = 0; |
| 350 | to = (struct sockaddr_in *)&whereto; |
| 351 | while ((ch = getopt(argc, argv, "dm:np:q:rs:t:w:v")) != EOF) |
| 352 | switch(ch) { |
| 353 | case 'd': |
Eric Andersen | bdfd0d7 | 2001-10-24 05:00:29 +0000 | [diff] [blame] | 354 | #ifdef CONFIG_FEATURE_TRACEROUTE_SO_DEBUG |
Eric Andersen | 5c58d28 | 2001-07-10 16:29:00 +0000 | [diff] [blame] | 355 | options |= SO_DEBUG; |
Eric Andersen | 7467c8d | 2001-07-12 20:26:32 +0000 | [diff] [blame] | 356 | #endif |
Eric Andersen | 5c58d28 | 2001-07-10 16:29:00 +0000 | [diff] [blame] | 357 | break; |
| 358 | case 'm': |
| 359 | max_ttl = atoi(optarg); |
| 360 | if (max_ttl <= 1) |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 361 | bb_error_msg_and_die("max ttl must be >1."); |
Eric Andersen | 5c58d28 | 2001-07-10 16:29:00 +0000 | [diff] [blame] | 362 | break; |
| 363 | case 'n': |
| 364 | nflag++; |
| 365 | break; |
| 366 | case 'p': |
| 367 | port = atoi(optarg); |
| 368 | if (port < 1) |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 369 | bb_error_msg_and_die("port must be >0."); |
Eric Andersen | 5c58d28 | 2001-07-10 16:29:00 +0000 | [diff] [blame] | 370 | break; |
| 371 | case 'q': |
| 372 | nprobes = atoi(optarg); |
| 373 | if (nprobes < 1) |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 374 | bb_error_msg_and_die("nprobes must be >0."); |
Eric Andersen | 5c58d28 | 2001-07-10 16:29:00 +0000 | [diff] [blame] | 375 | break; |
| 376 | case 'r': |
| 377 | options |= SO_DONTROUTE; |
| 378 | break; |
| 379 | case 's': |
| 380 | /* |
| 381 | * set the ip source address of the outbound |
| 382 | * probe (e.g., on a multi-homed host). |
| 383 | */ |
| 384 | source = optarg; |
| 385 | break; |
| 386 | case 't': |
| 387 | tos = atoi(optarg); |
| 388 | if (tos < 0 || tos > 255) |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 389 | bb_error_msg_and_die("tos must be 0 to 255."); |
Eric Andersen | 5c58d28 | 2001-07-10 16:29:00 +0000 | [diff] [blame] | 390 | break; |
| 391 | case 'v': |
Eric Andersen | bdfd0d7 | 2001-10-24 05:00:29 +0000 | [diff] [blame] | 392 | #ifdef CONFIG_FEATURE_TRACEROUTE_VERBOSE |
Eric Andersen | 5c58d28 | 2001-07-10 16:29:00 +0000 | [diff] [blame] | 393 | verbose++; |
Eric Andersen | 7467c8d | 2001-07-12 20:26:32 +0000 | [diff] [blame] | 394 | #endif |
Eric Andersen | 5c58d28 | 2001-07-10 16:29:00 +0000 | [diff] [blame] | 395 | break; |
| 396 | case 'w': |
| 397 | waittime = atoi(optarg); |
| 398 | if (waittime <= 1) |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 399 | bb_error_msg_and_die("wait must be >1 sec."); |
Eric Andersen | 5c58d28 | 2001-07-10 16:29:00 +0000 | [diff] [blame] | 400 | break; |
| 401 | default: |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 402 | bb_show_usage(); |
Eric Andersen | 5c58d28 | 2001-07-10 16:29:00 +0000 | [diff] [blame] | 403 | } |
| 404 | argc -= optind; |
| 405 | argv += optind; |
| 406 | |
| 407 | if (argc < 1) |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 408 | bb_show_usage(); |
Eric Andersen | 5c58d28 | 2001-07-10 16:29:00 +0000 | [diff] [blame] | 409 | |
| 410 | setlinebuf (stdout); |
| 411 | |
Eric Andersen | 7467c8d | 2001-07-12 20:26:32 +0000 | [diff] [blame] | 412 | memset(&whereto, 0, sizeof(struct sockaddr)); |
| 413 | hp = xgethostbyname(*argv); |
Eric Andersen | 5c58d28 | 2001-07-10 16:29:00 +0000 | [diff] [blame] | 414 | to->sin_family = hp->h_addrtype; |
Eric Andersen | 7467c8d | 2001-07-12 20:26:32 +0000 | [diff] [blame] | 415 | memcpy(&to->sin_addr, hp->h_addr, hp->h_length); |
Eric Andersen | 5c58d28 | 2001-07-10 16:29:00 +0000 | [diff] [blame] | 416 | hostname = (char *)hp->h_name; |
Eric Andersen | 5c58d28 | 2001-07-10 16:29:00 +0000 | [diff] [blame] | 417 | if (*++argv) |
| 418 | datalen = atoi(*argv); |
| 419 | if (datalen < 0 || datalen >= MAXPACKET - sizeof(struct opacket)) |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 420 | bb_error_msg_and_die("packet size must be 0 <= s < %d.", |
Mike Frysinger | 66c37d1 | 2005-07-31 22:22:20 +0000 | [diff] [blame] | 421 | (int)(MAXPACKET - sizeof(struct opacket))); |
Eric Andersen | 5c58d28 | 2001-07-10 16:29:00 +0000 | [diff] [blame] | 422 | datalen += sizeof(struct opacket); |
| 423 | outpacket = (struct opacket *)xmalloc((unsigned)datalen); |
Eric Andersen | 7467c8d | 2001-07-12 20:26:32 +0000 | [diff] [blame] | 424 | memset(outpacket, 0, datalen); |
Eric Andersen | 5c58d28 | 2001-07-10 16:29:00 +0000 | [diff] [blame] | 425 | outpacket->ip.ip_dst = to->sin_addr; |
| 426 | outpacket->ip.ip_tos = tos; |
| 427 | outpacket->ip.ip_v = IPVERSION; |
| 428 | outpacket->ip.ip_id = 0; |
| 429 | |
| 430 | ident = (getpid() & 0xffff) | 0x8000; |
| 431 | |
Eric Andersen | 7467c8d | 2001-07-12 20:26:32 +0000 | [diff] [blame] | 432 | if ((sndsock = socket(AF_INET, SOCK_RAW, IPPROTO_RAW)) < 0) |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 433 | bb_perror_msg_and_die(bb_msg_can_not_create_raw_socket); |
Eric Andersen | 7467c8d | 2001-07-12 20:26:32 +0000 | [diff] [blame] | 434 | |
| 435 | s = create_icmp_socket(); |
| 436 | |
Eric Andersen | bdfd0d7 | 2001-10-24 05:00:29 +0000 | [diff] [blame] | 437 | #ifdef CONFIG_FEATURE_TRACEROUTE_SO_DEBUG |
Eric Andersen | 5c58d28 | 2001-07-10 16:29:00 +0000 | [diff] [blame] | 438 | if (options & SO_DEBUG) |
| 439 | (void) setsockopt(s, SOL_SOCKET, SO_DEBUG, |
| 440 | (char *)&on, sizeof(on)); |
Eric Andersen | 7467c8d | 2001-07-12 20:26:32 +0000 | [diff] [blame] | 441 | #endif |
Eric Andersen | 5c58d28 | 2001-07-10 16:29:00 +0000 | [diff] [blame] | 442 | if (options & SO_DONTROUTE) |
| 443 | (void) setsockopt(s, SOL_SOCKET, SO_DONTROUTE, |
| 444 | (char *)&on, sizeof(on)); |
Eric Andersen | 5c58d28 | 2001-07-10 16:29:00 +0000 | [diff] [blame] | 445 | #ifdef SO_SNDBUF |
| 446 | if (setsockopt(sndsock, SOL_SOCKET, SO_SNDBUF, (char *)&datalen, |
| 447 | sizeof(datalen)) < 0) |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 448 | bb_perror_msg_and_die("SO_SNDBUF"); |
Eric Andersen | ad79c0b | 2002-06-06 12:24:51 +0000 | [diff] [blame] | 449 | #endif |
Eric Andersen | 5c58d28 | 2001-07-10 16:29:00 +0000 | [diff] [blame] | 450 | #ifdef IP_HDRINCL |
| 451 | if (setsockopt(sndsock, IPPROTO_IP, IP_HDRINCL, (char *)&on, |
| 452 | sizeof(on)) < 0) |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 453 | bb_perror_msg_and_die("IP_HDRINCL"); |
Eric Andersen | ad79c0b | 2002-06-06 12:24:51 +0000 | [diff] [blame] | 454 | #endif |
Eric Andersen | bdfd0d7 | 2001-10-24 05:00:29 +0000 | [diff] [blame] | 455 | #ifdef CONFIG_FEATURE_TRACEROUTE_SO_DEBUG |
Eric Andersen | 5c58d28 | 2001-07-10 16:29:00 +0000 | [diff] [blame] | 456 | if (options & SO_DEBUG) |
| 457 | (void) setsockopt(sndsock, SOL_SOCKET, SO_DEBUG, |
| 458 | (char *)&on, sizeof(on)); |
Eric Andersen | 7467c8d | 2001-07-12 20:26:32 +0000 | [diff] [blame] | 459 | #endif |
Eric Andersen | 5c58d28 | 2001-07-10 16:29:00 +0000 | [diff] [blame] | 460 | if (options & SO_DONTROUTE) |
| 461 | (void) setsockopt(sndsock, SOL_SOCKET, SO_DONTROUTE, |
| 462 | (char *)&on, sizeof(on)); |
| 463 | |
| 464 | if (source) { |
Eric Andersen | 7467c8d | 2001-07-12 20:26:32 +0000 | [diff] [blame] | 465 | memset(&from, 0, sizeof(struct sockaddr)); |
Eric Andersen | 5c58d28 | 2001-07-10 16:29:00 +0000 | [diff] [blame] | 466 | from.sin_family = AF_INET; |
| 467 | from.sin_addr.s_addr = inet_addr(source); |
| 468 | if (from.sin_addr.s_addr == -1) |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 469 | bb_error_msg_and_die("unknown host %s", source); |
Eric Andersen | 5c58d28 | 2001-07-10 16:29:00 +0000 | [diff] [blame] | 470 | outpacket->ip.ip_src = from.sin_addr; |
| 471 | #ifndef IP_HDRINCL |
| 472 | if (bind(sndsock, (struct sockaddr *)&from, sizeof(from)) < 0) |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 473 | bb_perror_msg_and_die("bind"); |
Eric Andersen | ad79c0b | 2002-06-06 12:24:51 +0000 | [diff] [blame] | 474 | #endif |
Eric Andersen | 5c58d28 | 2001-07-10 16:29:00 +0000 | [diff] [blame] | 475 | } |
| 476 | |
| 477 | fprintf(stderr, "traceroute to %s (%s)", hostname, |
| 478 | inet_ntoa(to->sin_addr)); |
| 479 | if (source) |
| 480 | fprintf(stderr, " from %s", source); |
| 481 | fprintf(stderr, ", %d hops max, %d byte packets\n", max_ttl, datalen); |
Eric Andersen | 5c58d28 | 2001-07-10 16:29:00 +0000 | [diff] [blame] | 482 | |
| 483 | for (ttl = 1; ttl <= max_ttl; ++ttl) { |
| 484 | u_long lastaddr = 0; |
| 485 | int got_there = 0; |
| 486 | int unreachable = 0; |
| 487 | |
| 488 | printf("%2d ", ttl); |
| 489 | for (probe = 0; probe < nprobes; ++probe) { |
| 490 | int cc, reset_timer; |
| 491 | struct timeval t1, t2; |
| 492 | struct timezone tz; |
| 493 | struct ip *ip; |
| 494 | |
| 495 | (void) gettimeofday(&t1, &tz); |
| 496 | send_probe(++seq, ttl); |
| 497 | reset_timer = 1; |
Paul Fox | 2806940 | 2005-07-20 11:55:08 +0000 | [diff] [blame] | 498 | while ((cc = wait_for_reply(s, &from, reset_timer)) != 0) { |
Eric Andersen | 5c58d28 | 2001-07-10 16:29:00 +0000 | [diff] [blame] | 499 | (void) gettimeofday(&t2, &tz); |
| 500 | if ((i = packet_ok(packet, cc, &from, seq))) { |
| 501 | reset_timer = 1; |
| 502 | if (from.sin_addr.s_addr != lastaddr) { |
| 503 | print(packet, cc, &from); |
| 504 | lastaddr = from.sin_addr.s_addr; |
| 505 | } |
| 506 | printf(" %g ms", deltaT(&t1, &t2)); |
| 507 | switch(i - 1) { |
| 508 | case ICMP_UNREACH_PORT: |
Eric Andersen | 5c58d28 | 2001-07-10 16:29:00 +0000 | [diff] [blame] | 509 | ip = (struct ip *)packet; |
| 510 | if (ip->ip_ttl <= 1) |
| 511 | printf(" !"); |
Eric Andersen | 5c58d28 | 2001-07-10 16:29:00 +0000 | [diff] [blame] | 512 | ++got_there; |
| 513 | break; |
| 514 | case ICMP_UNREACH_NET: |
| 515 | ++unreachable; |
| 516 | printf(" !N"); |
| 517 | break; |
| 518 | case ICMP_UNREACH_HOST: |
| 519 | ++unreachable; |
| 520 | printf(" !H"); |
| 521 | break; |
| 522 | case ICMP_UNREACH_PROTOCOL: |
| 523 | ++got_there; |
| 524 | printf(" !P"); |
| 525 | break; |
| 526 | case ICMP_UNREACH_NEEDFRAG: |
| 527 | ++unreachable; |
| 528 | printf(" !F"); |
| 529 | break; |
| 530 | case ICMP_UNREACH_SRCFAIL: |
| 531 | ++unreachable; |
| 532 | printf(" !S"); |
| 533 | break; |
| 534 | } |
| 535 | break; |
| 536 | } else |
| 537 | reset_timer = 0; |
| 538 | } |
| 539 | if (cc == 0) |
| 540 | printf(" *"); |
| 541 | (void) fflush(stdout); |
| 542 | } |
| 543 | putchar('\n'); |
| 544 | if (got_there || unreachable >= nprobes-1) |
Eric Andersen | cd8c436 | 2001-11-10 11:22:46 +0000 | [diff] [blame] | 545 | return 0; |
Eric Andersen | 5c58d28 | 2001-07-10 16:29:00 +0000 | [diff] [blame] | 546 | } |
| 547 | |
| 548 | return 0; |
| 549 | } |