File: | src/usr.bin/bgplg/traceroute/../../../usr.sbin/traceroute/traceroute.c |
Warning: | line 357, column 13 Although the value stored to 'rcvsock6' is used in the enclosing expression, the value is never actually read from 'rcvsock6' |
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1 | /* $OpenBSD: traceroute.c,v 1.169 2022/03/24 14:39:08 deraadt Exp $ */ |
2 | /* $NetBSD: traceroute.c,v 1.10 1995/05/21 15:50:45 mycroft Exp $ */ |
3 | |
4 | /* |
5 | * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. |
6 | * All rights reserved. |
7 | * |
8 | * Redistribution and use in source and binary forms, with or without |
9 | * modification, are permitted provided that the following conditions |
10 | * are met: |
11 | * 1. Redistributions of source code must retain the above copyright |
12 | * notice, this list of conditions and the following disclaimer. |
13 | * 2. Redistributions in binary form must reproduce the above copyright |
14 | * notice, this list of conditions and the following disclaimer in the |
15 | * documentation and/or other materials provided with the distribution. |
16 | * 3. Neither the name of the project nor the names of its contributors |
17 | * may be used to endorse or promote products derived from this software |
18 | * without specific prior written permission. |
19 | * |
20 | * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND |
21 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
22 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
23 | * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE |
24 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
25 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
26 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
27 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
28 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
29 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
30 | * SUCH DAMAGE. |
31 | */ |
32 | |
33 | /*- |
34 | * Copyright (c) 1990, 1993 |
35 | * The Regents of the University of California. All rights reserved. |
36 | * |
37 | * This code is derived from software contributed to Berkeley by |
38 | * Van Jacobson. |
39 | * |
40 | * Redistribution and use in source and binary forms, with or without |
41 | * modification, are permitted provided that the following conditions |
42 | * are met: |
43 | * 1. Redistributions of source code must retain the above copyright |
44 | * notice, this list of conditions and the following disclaimer. |
45 | * 2. Redistributions in binary form must reproduce the above copyright |
46 | * notice, this list of conditions and the following disclaimer in the |
47 | * documentation and/or other materials provided with the distribution. |
48 | * 3. Neither the name of the University nor the names of its contributors |
49 | * may be used to endorse or promote products derived from this software |
50 | * without specific prior written permission. |
51 | * |
52 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
53 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
54 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
55 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
56 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
57 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
58 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
59 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
60 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
61 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
62 | * SUCH DAMAGE. |
63 | */ |
64 | |
65 | /* |
66 | * traceroute host - trace the route ip packets follow going to "host". |
67 | * |
68 | * Attempt to trace the route an ip packet would follow to some |
69 | * internet host. We find out intermediate hops by launching probe |
70 | * packets with a small ttl (time to live) then listening for an |
71 | * icmp "time exceeded" reply from a gateway. We start our probes |
72 | * with a ttl of one and increase by one until we get an icmp "port |
73 | * unreachable" (which means we got to "host") or hit a max (which |
74 | * defaults to 64 hops & can be changed with the -m flag). Three |
75 | * probes (change with -q flag) are sent at each ttl setting and a |
76 | * line is printed showing the ttl, address of the gateway and |
77 | * round trip time of each probe. If the probe answers come from |
78 | * different gateways, the address of each responding system will |
79 | * be printed. If there is no response within a 5 sec. timeout |
80 | * interval (changed with the -w flag), a "*" is printed for that |
81 | * probe. |
82 | * |
83 | * Probe packets are UDP format. We don't want the destination |
84 | * host to process them so the destination port is set to an |
85 | * unlikely value (if some clod on the destination is using that |
86 | * value, it can be changed with the -p flag). |
87 | * |
88 | * A sample use might be: |
89 | * |
90 | * [yak 71]% traceroute nis.nsf.net. |
91 | * traceroute to nis.nsf.net (35.1.1.48), 64 hops max, 56 byte packet |
92 | * 1 helios.ee.lbl.gov (128.3.112.1) 19 ms 19 ms 0 ms |
93 | * 2 lilac-dmc.Berkeley.EDU (128.32.216.1) 39 ms 39 ms 19 ms |
94 | * 3 lilac-dmc.Berkeley.EDU (128.32.216.1) 39 ms 39 ms 19 ms |
95 | * 4 ccngw-ner-cc.Berkeley.EDU (128.32.136.23) 39 ms 40 ms 39 ms |
96 | * 5 ccn-nerif22.Berkeley.EDU (128.32.168.22) 39 ms 39 ms 39 ms |
97 | * 6 128.32.197.4 (128.32.197.4) 40 ms 59 ms 59 ms |
98 | * 7 131.119.2.5 (131.119.2.5) 59 ms 59 ms 59 ms |
99 | * 8 129.140.70.13 (129.140.70.13) 99 ms 99 ms 80 ms |
100 | * 9 129.140.71.6 (129.140.71.6) 139 ms 239 ms 319 ms |
101 | * 10 129.140.81.7 (129.140.81.7) 220 ms 199 ms 199 ms |
102 | * 11 nic.merit.edu (35.1.1.48) 239 ms 239 ms 239 ms |
103 | * |
104 | * Note that lines 2 & 3 are the same. This is due to a buggy |
105 | * kernel on the 2nd hop system -- lbl-csam.arpa -- that forwards |
106 | * packets with a zero ttl. |
107 | * |
108 | * A more interesting example is: |
109 | * |
110 | * [yak 72]% traceroute allspice.lcs.mit.edu. |
111 | * traceroute to allspice.lcs.mit.edu (18.26.0.115), 64 hops max |
112 | * 1 helios.ee.lbl.gov (128.3.112.1) 0 ms 0 ms 0 ms |
113 | * 2 lilac-dmc.Berkeley.EDU (128.32.216.1) 19 ms 19 ms 19 ms |
114 | * 3 lilac-dmc.Berkeley.EDU (128.32.216.1) 39 ms 19 ms 19 ms |
115 | * 4 ccngw-ner-cc.Berkeley.EDU (128.32.136.23) 19 ms 39 ms 39 ms |
116 | * 5 ccn-nerif22.Berkeley.EDU (128.32.168.22) 20 ms 39 ms 39 ms |
117 | * 6 128.32.197.4 (128.32.197.4) 59 ms 119 ms 39 ms |
118 | * 7 131.119.2.5 (131.119.2.5) 59 ms 59 ms 39 ms |
119 | * 8 129.140.70.13 (129.140.70.13) 80 ms 79 ms 99 ms |
120 | * 9 129.140.71.6 (129.140.71.6) 139 ms 139 ms 159 ms |
121 | * 10 129.140.81.7 (129.140.81.7) 199 ms 180 ms 300 ms |
122 | * 11 129.140.72.17 (129.140.72.17) 300 ms 239 ms 239 ms |
123 | * 12 * * * |
124 | * 13 128.121.54.72 (128.121.54.72) 259 ms 499 ms 279 ms |
125 | * 14 * * * |
126 | * 15 * * * |
127 | * 16 * * * |
128 | * 17 * * * |
129 | * 18 ALLSPICE.LCS.MIT.EDU (18.26.0.115) 339 ms 279 ms 279 ms |
130 | * |
131 | * (I start to see why I'm having so much trouble with mail to |
132 | * MIT.) Note that the gateways 12, 14, 15, 16 & 17 hops away |
133 | * either don't send ICMP "time exceeded" messages or send them |
134 | * with a ttl too small to reach us. 14 - 17 are running the |
135 | * MIT C Gateway code that doesn't send "time exceeded"s. God |
136 | * only knows what's going on with 12. |
137 | * |
138 | * The silent gateway 12 in the above may be the result of a bug in |
139 | * the 4.[23]BSD network code (and its derivatives): 4.x (x <= 3) |
140 | * sends an unreachable message using whatever ttl remains in the |
141 | * original datagram. Since, for gateways, the remaining ttl is |
142 | * zero, the icmp "time exceeded" is guaranteed to not make it back |
143 | * to us. The behavior of this bug is slightly more interesting |
144 | * when it appears on the destination system: |
145 | * |
146 | * 1 helios.ee.lbl.gov (128.3.112.1) 0 ms 0 ms 0 ms |
147 | * 2 lilac-dmc.Berkeley.EDU (128.32.216.1) 39 ms 19 ms 39 ms |
148 | * 3 lilac-dmc.Berkeley.EDU (128.32.216.1) 19 ms 39 ms 19 ms |
149 | * 4 ccngw-ner-cc.Berkeley.EDU (128.32.136.23) 39 ms 40 ms 19 ms |
150 | * 5 ccn-nerif35.Berkeley.EDU (128.32.168.35) 39 ms 39 ms 39 ms |
151 | * 6 csgw.Berkeley.EDU (128.32.133.254) 39 ms 59 ms 39 ms |
152 | * 7 * * * |
153 | * 8 * * * |
154 | * 9 * * * |
155 | * 10 * * * |
156 | * 11 * * * |
157 | * 12 * * * |
158 | * 13 rip.Berkeley.EDU (128.32.131.22) 59 ms ! 39 ms ! 39 ms ! |
159 | * |
160 | * Notice that there are 12 "gateways" (13 is the final |
161 | * destination) and exactly the last half of them are "missing". |
162 | * What's really happening is that rip (a Sun-3 running Sun OS3.5) |
163 | * is using the ttl from our arriving datagram as the ttl in its |
164 | * icmp reply. So, the reply will time out on the return path |
165 | * (with no notice sent to anyone since icmp's aren't sent for |
166 | * icmp's) until we probe with a ttl that's at least twice the path |
167 | * length. I.e., rip is really only 7 hops away. A reply that |
168 | * returns with a ttl of 1 is a clue this problem exists. |
169 | * Traceroute prints a "!" after the time if the ttl is <= 1. |
170 | * Since vendors ship a lot of obsolete (DEC's Ultrix, Sun 3.x) or |
171 | * non-standard (HPUX) software, expect to see this problem |
172 | * frequently and/or take care picking the target host of your |
173 | * probes. |
174 | * |
175 | * Other possible annotations after the time are !H, !N, !P (got a host, |
176 | * network or protocol unreachable, respectively), !S or !F (source |
177 | * route failed or fragmentation needed -- neither of these should |
178 | * ever occur and the associated gateway is busted if you see one). If |
179 | * almost all the probes result in some kind of unreachable, traceroute |
180 | * will give up and exit. |
181 | * |
182 | * Notes |
183 | * ----- |
184 | * This program must be run by root or be setuid. (I suggest that |
185 | * you *don't* make it setuid -- casual use could result in a lot |
186 | * of unnecessary traffic on our poor, congested nets.) |
187 | * |
188 | * This program requires a kernel mod that does not appear in any |
189 | * system available from Berkeley: A raw ip socket using proto |
190 | * IPPROTO_RAW must interpret the data sent as an ip datagram (as |
191 | * opposed to data to be wrapped in a ip datagram). See the README |
192 | * file that came with the source to this program for a description |
193 | * of the mods I made to /sys/netinet/raw_ip.c. Your mileage may |
194 | * vary. But, again, ANY 4.x (x < 4) BSD KERNEL WILL HAVE TO BE |
195 | * MODIFIED TO RUN THIS PROGRAM. |
196 | * |
197 | * The udp port usage may appear bizarre (well, ok, it is bizarre). |
198 | * The problem is that an icmp message only contains 8 bytes of |
199 | * data from the original datagram. 8 bytes is the size of a udp |
200 | * header so, if we want to associate replies with the original |
201 | * datagram, the necessary information must be encoded into the |
202 | * udp header (the ip id could be used but there's no way to |
203 | * interlock with the kernel's assignment of ip id's and, anyway, |
204 | * it would have taken a lot more kernel hacking to allow this |
205 | * code to set the ip id). So, to allow two or more users to |
206 | * use traceroute simultaneously, we use this task's pid as the |
207 | * source port (the high bit is set to move the port number out |
208 | * of the "likely" range). To keep track of which probe is being |
209 | * replied to (so times and/or hop counts don't get confused by a |
210 | * reply that was delayed in transit), we increment the destination |
211 | * port number before each probe. |
212 | * |
213 | * Don't use this as a coding example. I was trying to find a |
214 | * routing problem and this code sort-of popped out after 48 hours |
215 | * without sleep. I was amazed it ever compiled, much less ran. |
216 | * |
217 | * I stole the idea for this program from Steve Deering. Since |
218 | * the first release, I've learned that had I attended the right |
219 | * IETF working group meetings, I also could have stolen it from Guy |
220 | * Almes or Matt Mathis. I don't know (or care) who came up with |
221 | * the idea first. I envy the originators' perspicacity and I'm |
222 | * glad they didn't keep the idea a secret. |
223 | * |
224 | * Tim Seaver, Ken Adelman and C. Philip Wood provided bug fixes and/or |
225 | * enhancements to the original distribution. |
226 | * |
227 | * I've hacked up a round-trip-route version of this that works by |
228 | * sending a loose-source-routed udp datagram through the destination |
229 | * back to yourself. Unfortunately, SO many gateways botch source |
230 | * routing, the thing is almost worthless. Maybe one day... |
231 | * |
232 | * -- Van Jacobson (van@helios.ee.lbl.gov) |
233 | * Tue Dec 20 03:50:13 PST 1988 |
234 | */ |
235 | |
236 | #include <sys/socket.h> |
237 | #include <sys/sysctl.h> |
238 | #include <sys/time.h> |
239 | #include <sys/uio.h> |
240 | |
241 | #include <netinet/in.h> |
242 | #include <netinet/ip.h> |
243 | #include <netinet/ip6.h> |
244 | #include <netinet/ip_icmp.h> |
245 | #include <netinet/icmp6.h> |
246 | #include <netinet/udp.h> |
247 | |
248 | #include <arpa/inet.h> |
249 | |
250 | #include <err.h> |
251 | #include <errno(*__errno()).h> |
252 | #include <event.h> |
253 | #include <limits.h> |
254 | #include <netdb.h> |
255 | #include <pwd.h> |
256 | #include <stdio.h> |
257 | #include <stdlib.h> |
258 | #include <string.h> |
259 | #include <unistd.h> |
260 | |
261 | #include "traceroute.h" |
262 | |
263 | int32_t sec_perturb; |
264 | int32_t usec_perturb; |
265 | |
266 | u_char packet[512]; |
267 | u_char *outpacket; /* last inbound (icmp) packet */ |
268 | |
269 | int rcvsock; /* receive (icmp) socket file descriptor */ |
270 | int sndsock; /* send (udp) socket file descriptor */ |
271 | |
272 | int rcvhlim; |
273 | struct in6_pktinfo *rcvpktinfo; |
274 | |
275 | int datalen; /* How much data */ |
276 | |
277 | char *hostname; |
278 | |
279 | u_int16_t srcport; |
280 | |
281 | void usage(void); |
282 | |
283 | #define TRACEROUTE_USER"_traceroute" "_traceroute" |
284 | |
285 | void sock_read(int, short, void *); |
286 | void send_timer(int, short, void *); |
287 | |
288 | struct tr_conf *conf; /* configuration defaults */ |
289 | struct tr_result *tr_results; |
290 | struct sockaddr_in from4, to4; |
291 | struct sockaddr_in6 from6, to6; |
292 | struct sockaddr *from, *to; |
293 | struct msghdr rcvmhdr; |
294 | struct event timer_ev; |
295 | int v6flag; |
296 | int *waiting_ttls; |
297 | int last_tos = 0; |
298 | |
299 | int |
300 | main(int argc, char *argv[]) |
301 | { |
302 | int mib[4] = { CTL_NET4, PF_INET2, IPPROTO_IP0, IPCTL_DEFTTL3 }; |
303 | char hbuf[NI_MAXHOST256]; |
304 | |
305 | struct addrinfo hints, *res; |
306 | struct hostent *hp; |
307 | struct ip *ip = NULL((void *)0); |
308 | struct iovec rcviov[2]; |
309 | static u_char *rcvcmsgbuf; |
310 | struct passwd *pw; |
311 | struct event sock_ev; |
312 | struct timeval tv = {0, 0}; |
313 | |
314 | long l; |
315 | socklen_t len; |
316 | size_t size; |
317 | |
318 | int ch; |
319 | int on = 1; |
320 | int error; |
321 | int headerlen; /* How long packet's header is */ |
322 | int i; |
323 | int packetlen; |
324 | int rcvcmsglen; |
325 | int rcvsock4, rcvsock6; |
326 | int sndsock4, sndsock6; |
327 | u_int32_t tmprnd; |
328 | int v4sock_errno, v6sock_errno; |
329 | |
330 | char *dest; |
331 | const char *errstr; |
332 | |
333 | uid_t ouid, uid; |
334 | gid_t gid; |
335 | |
336 | /* Cannot pledge due to special setsockopt()s below */ |
337 | if (unveil("/", "r") == -1) |
338 | err(1, "unveil /"); |
339 | if (unveil(NULL((void *)0), NULL((void *)0)) == -1) |
340 | err(1, "unveil"); |
341 | |
342 | if ((conf = calloc(1, sizeof(*conf))) == NULL((void *)0)) |
343 | err(1,NULL((void *)0)); |
344 | |
345 | conf->first_ttl = 1; |
346 | conf->proto = IPPROTO_UDP17; |
347 | conf->max_ttl = IPDEFTTL64; |
348 | conf->nprobes = 3; |
349 | conf->expected_responses = 2; /* icmp + DNS */ |
350 | |
351 | /* start udp dest port # for probe packets */ |
352 | conf->port = 32768+666; |
353 | |
354 | memset(&rcvmhdr, 0, sizeof(rcvmhdr)); |
355 | memset(&rcviov, 0, sizeof(rcviov)); |
356 | |
357 | rcvsock4 = rcvsock6 = sndsock4 = sndsock6 = -1; |
Although the value stored to 'rcvsock6' is used in the enclosing expression, the value is never actually read from 'rcvsock6' | |
358 | v4sock_errno = v6sock_errno = 0; |
359 | |
360 | conf->waittime = 3 * 1000; |
361 | |
362 | if ((rcvsock6 = socket(AF_INET624, SOCK_RAW3, IPPROTO_ICMPV658)) == -1) |
363 | v6sock_errno = errno(*__errno()); |
364 | else if ((sndsock6 = socket(AF_INET624, SOCK_DGRAM2, 0)) == -1) |
365 | v6sock_errno = errno(*__errno()); |
366 | |
367 | if ((rcvsock4 = socket(AF_INET2, SOCK_RAW3, IPPROTO_ICMP1)) == -1) |
368 | v4sock_errno = errno(*__errno()); |
369 | else if ((sndsock4 = socket(AF_INET2, SOCK_RAW3, IPPROTO_RAW255)) == -1) |
370 | v4sock_errno = errno(*__errno()); |
371 | |
372 | /* revoke privs */ |
373 | ouid = getuid(); |
374 | if (ouid == 0 && (pw = getpwnam(TRACEROUTE_USER"_traceroute")) != NULL((void *)0)) { |
375 | uid = pw->pw_uid; |
376 | gid = pw->pw_gid; |
377 | } else { |
378 | uid = getuid(); |
379 | gid = getgid(); |
380 | } |
381 | if (ouid && (setgroups(1, &gid) || |
382 | setresgid(gid, gid, gid) || |
383 | setresuid(uid, uid, uid))) |
384 | err(1, "unable to revoke privs"); |
385 | |
386 | if (strcmp("traceroute6", __progname) == 0) { |
387 | v6flag = 1; |
388 | if (v6sock_errno != 0) |
389 | errc(5, v6sock_errno, rcvsock6 < 0 ? "socket(ICMPv6)" : |
390 | "socket(SOCK_DGRAM)"); |
391 | rcvsock = rcvsock6; |
392 | sndsock = sndsock6; |
393 | if (rcvsock4 >= 0) |
394 | close(rcvsock4); |
395 | if (sndsock4 >= 0) |
396 | close(sndsock4); |
397 | } else { |
398 | if (v4sock_errno != 0) |
399 | errc(5, v4sock_errno, rcvsock4 < 0 ? "icmp socket" : |
400 | "raw socket"); |
401 | rcvsock = rcvsock4; |
402 | sndsock = sndsock4; |
403 | if (rcvsock6 >= 0) |
404 | close(rcvsock6); |
405 | if (sndsock6 >= 0) |
406 | close(sndsock6); |
407 | } |
408 | |
409 | if (v6flag) { |
410 | mib[1] = PF_INET624; |
411 | mib[2] = IPPROTO_IPV641; |
412 | mib[3] = IPV6CTL_DEFHLIM3; |
413 | /* specify to tell receiving interface */ |
414 | if (setsockopt(rcvsock, IPPROTO_IPV641, IPV6_RECVPKTINFO36, &on, |
415 | sizeof(on)) == -1) |
416 | err(1, "setsockopt(IPV6_RECVPKTINFO)"); |
417 | |
418 | /* specify to tell hoplimit field of received IP6 hdr */ |
419 | if (setsockopt(rcvsock, IPPROTO_IPV641, IPV6_RECVHOPLIMIT37, &on, |
420 | sizeof(on)) == -1) |
421 | err(1, "setsockopt(IPV6_RECVHOPLIMIT)"); |
422 | } |
423 | |
424 | size = sizeof(i); |
425 | if (sysctl(mib, sizeof(mib)/sizeof(mib[0]), &i, &size, NULL((void *)0), 0) == -1) |
426 | err(1, "sysctl"); |
427 | conf->max_ttl = i; |
428 | |
429 | while ((ch = getopt(argc, argv, v6flag ? "ADdf:Ilm:np:q:Ss:t:w:vV:" : |
430 | "ADdf:g:Ilm:nP:p:q:Ss:t:V:vw:x")) != -1) |
431 | switch (ch) { |
432 | case 'A': |
433 | conf->Aflag = 1; |
434 | conf->expected_responses++; |
435 | break; |
436 | case 'd': |
437 | conf->dflag = 1; |
438 | break; |
439 | case 'D': |
440 | conf->dump = 1; |
441 | break; |
442 | case 'f': |
443 | conf->first_ttl = strtonum(optarg, 1, conf->max_ttl, |
444 | &errstr); |
445 | if (errstr) |
446 | errx(1, "min ttl must be 1 to %u.", |
447 | conf->max_ttl); |
448 | break; |
449 | case 'g': |
450 | if (conf->lsrr >= MAX_LSRR((40 - 4) / 4)) |
451 | errx(1, "too many gateways; max %d", MAX_LSRR((40 - 4) / 4)); |
452 | if (inet_aton(optarg, &conf->gateway[conf->lsrr]) == |
453 | 0) { |
454 | hp = gethostbyname(optarg); |
455 | if (hp == 0) |
456 | errx(1, "unknown host %s", optarg); |
457 | memcpy(&conf->gateway[conf->lsrr], hp->h_addrh_addr_list[0], |
458 | hp->h_length); |
459 | } |
460 | if (++conf->lsrr == 1) |
461 | conf->lsrrlen = 4; |
462 | conf->lsrrlen += 4; |
463 | break; |
464 | case 'I': |
465 | if (conf->protoset) |
466 | errx(1, "protocol already set with -P"); |
467 | conf->protoset = 1; |
468 | conf->proto = IPPROTO_ICMP1; |
469 | break; |
470 | case 'l': |
471 | conf->ttl_flag = 1; |
472 | break; |
473 | case 'm': |
474 | conf->max_ttl = strtonum(optarg, conf->first_ttl, |
475 | MAXTTL255, &errstr); |
476 | if (errstr) |
477 | errx(1, "max ttl must be %u to %u.", |
478 | conf->first_ttl, MAXTTL255); |
479 | break; |
480 | case 'n': |
481 | conf->nflag = 1; |
482 | conf->expected_responses--; |
483 | break; |
484 | case 'p': |
485 | conf->port = strtonum(optarg, 1, 65535, &errstr); |
486 | if (errstr) |
487 | errx(1, "port must be >0, <65536."); |
488 | break; |
489 | case 'P': |
490 | if (conf->protoset) |
491 | errx(1, "protocol already set with -I"); |
492 | conf->protoset = 1; |
493 | conf->proto = strtonum(optarg, 1, IPPROTO_MAX256 - 1, |
494 | &errstr); |
495 | if (errstr) { |
496 | struct protoent *pent; |
497 | |
498 | pent = getprotobyname(optarg); |
499 | if (pent) |
500 | conf->proto = pent->p_proto; |
501 | else |
502 | errx(1, "proto must be >=1, or a " |
503 | "name."); |
504 | } |
505 | break; |
506 | case 'q': |
507 | conf->nprobes = strtonum(optarg, 1, 1024, &errstr); |
508 | if (errstr) |
509 | errx(1, "nprobes must be >0."); |
510 | break; |
511 | case 's': |
512 | /* |
513 | * set the ip source address of the outbound |
514 | * probe (e.g., on a multi-homed host). |
515 | */ |
516 | conf->source = optarg; |
517 | break; |
518 | case 'S': |
519 | conf->sump = 1; |
520 | break; |
521 | case 't': |
522 | if (!map_tos(optarg, &conf->tos)) { |
523 | if (strlen(optarg) > 1 && optarg[0] == '0' && |
524 | optarg[1] == 'x') { |
525 | char *ep; |
526 | errno(*__errno()) = 0; |
527 | ep = NULL((void *)0); |
528 | l = strtol(optarg, &ep, 16); |
529 | if (errno(*__errno()) || !*optarg || *ep || |
530 | l < 0 || l > 255) |
531 | errx(1, "illegal tos value %s", |
532 | optarg); |
533 | conf->tos = (int)l; |
534 | } else { |
535 | conf->tos = strtonum(optarg, 0, 255, |
536 | &errstr); |
537 | if (errstr) |
538 | errx(1, "illegal tos value %s", |
539 | optarg); |
540 | } |
541 | } |
542 | conf->tflag = 1; |
543 | last_tos = conf->tos; |
544 | break; |
545 | case 'v': |
546 | conf->verbose = 1; |
547 | break; |
548 | case 'V': |
549 | conf->rtableid = (unsigned int)strtonum(optarg, 0, |
550 | RT_TABLEID_MAX255, &errstr); |
551 | if (errstr) |
552 | errx(1, "rtable value is %s: %s", |
553 | errstr, optarg); |
554 | if (setsockopt(sndsock, SOL_SOCKET0xffff, SO_RTABLE0x1021, |
555 | &conf->rtableid, sizeof(conf->rtableid)) == -1) |
556 | err(1, "setsockopt SO_RTABLE"); |
557 | if (setsockopt(rcvsock, SOL_SOCKET0xffff, SO_RTABLE0x1021, |
558 | &conf->rtableid, sizeof(conf->rtableid)) == -1) |
559 | err(1, "setsockopt SO_RTABLE"); |
560 | break; |
561 | case 'w': |
562 | conf->waittime = strtonum(optarg, 1, INT_MAX0x7fffffff, &errstr); |
563 | if (errstr) |
564 | errx(1, "wait must be >=1 sec."); |
565 | conf->waittime *= 1000; |
566 | break; |
567 | case 'x': |
568 | conf->xflag = 1; |
569 | break; |
570 | default: |
571 | usage(); |
572 | } |
573 | |
574 | if (ouid == 0 && (setgroups(1, &gid) || |
575 | setresgid(gid, gid, gid) || |
576 | setresuid(uid, uid, uid))) |
577 | err(1, "unable to revoke privs"); |
578 | |
579 | argc -= optind; |
580 | argv += optind; |
581 | |
582 | if (argc < 1 || argc > 2) |
583 | usage(); |
584 | |
585 | tr_results = calloc(sizeof(struct tr_result), conf->max_ttl * |
586 | conf->nprobes); |
587 | if (tr_results == NULL((void *)0)) |
588 | err(1, NULL((void *)0)); |
589 | |
590 | waiting_ttls = calloc(sizeof(int), conf->max_ttl); |
591 | for (i = 0; i < conf->max_ttl; i++) |
592 | waiting_ttls[i] = conf->nprobes * conf->expected_responses; |
593 | |
594 | setvbuf(stdout(&__sF[1]), NULL((void *)0), _IOLBF1, 0); |
595 | |
596 | conf->ident = (getpid() & 0xffff) | 0x8000; |
597 | tmprnd = arc4random(); |
598 | sec_perturb = (tmprnd & 0x80000000) ? -(tmprnd & 0x7ff) : |
599 | (tmprnd & 0x7ff); |
600 | usec_perturb = arc4random(); |
601 | |
602 | memset(&to4, 0, sizeof(to4)); |
603 | memset(&to6, 0, sizeof(to6)); |
604 | |
605 | dest = *argv; |
606 | |
607 | memset(&hints, 0, sizeof(hints)); |
608 | hints.ai_family = v6flag ? PF_INET624 : PF_INET2; |
609 | hints.ai_socktype = SOCK_RAW3; |
610 | hints.ai_protocol = 0; |
611 | hints.ai_flags = AI_CANONNAME2; |
612 | if ((error = getaddrinfo(dest, NULL((void *)0), &hints, &res))) |
613 | errx(1, "%s", gai_strerror(error)); |
614 | |
615 | switch (res->ai_family) { |
616 | case AF_INET2: |
617 | to = (struct sockaddr *)&to4; |
618 | from = (struct sockaddr *)&from4; |
619 | break; |
620 | case AF_INET624: |
621 | to = (struct sockaddr *)&to6; |
622 | from = (struct sockaddr *)&from6; |
623 | break; |
624 | default: |
625 | errx(1, "unsupported AF: %d", res->ai_family); |
626 | break; |
627 | } |
628 | |
629 | memcpy(to, res->ai_addr, res->ai_addrlen); |
630 | |
631 | if (!hostname) { |
632 | hostname = res->ai_canonname ? strdup(res->ai_canonname) : dest; |
633 | if (!hostname) |
634 | errx(1, "malloc"); |
635 | } |
636 | |
637 | if (res->ai_next) { |
638 | if (getnameinfo(res->ai_addr, res->ai_addrlen, hbuf, |
639 | sizeof(hbuf), NULL((void *)0), 0, NI_NUMERICHOST1) != 0) |
640 | strlcpy(hbuf, "?", sizeof(hbuf)); |
641 | warnx("Warning: %s has multiple " |
642 | "addresses; using %s", hostname, hbuf); |
643 | } |
644 | freeaddrinfo(res); |
645 | |
646 | if (*++argv) { |
647 | datalen = strtonum(*argv, 0, INT_MAX0x7fffffff, &errstr); |
648 | if (errstr) |
649 | errx(1, "datalen out of range"); |
650 | } |
651 | |
652 | switch (to->sa_family) { |
653 | case AF_INET2: |
654 | switch (conf->proto) { |
655 | case IPPROTO_UDP17: |
656 | headerlen = (sizeof(struct ip) + conf->lsrrlen + |
657 | sizeof(struct udphdr) + sizeof(struct packetdata)); |
658 | break; |
659 | case IPPROTO_ICMP1: |
660 | headerlen = (sizeof(struct ip) + conf->lsrrlen + |
661 | sizeof(struct icmp) + sizeof(struct packetdata)); |
662 | break; |
663 | default: |
664 | headerlen = (sizeof(struct ip) + conf->lsrrlen + |
665 | sizeof(struct packetdata)); |
666 | } |
667 | |
668 | if (datalen < 0 || datalen > IP_MAXPACKET65535 - headerlen) |
669 | errx(1, "packet size must be 0 to %d.", |
670 | IP_MAXPACKET65535 - headerlen); |
671 | |
672 | datalen += headerlen; |
673 | |
674 | if ((outpacket = calloc(1, datalen)) == NULL((void *)0)) |
675 | err(1, "calloc"); |
676 | |
677 | rcviov[0].iov_base = (caddr_t)packet; |
678 | rcviov[0].iov_len = sizeof(packet); |
679 | rcvmhdr.msg_name = (caddr_t)&from4; |
680 | rcvmhdr.msg_namelen = sizeof(from4); |
681 | rcvmhdr.msg_iov = rcviov; |
682 | rcvmhdr.msg_iovlen = 1; |
683 | rcvmhdr.msg_control = NULL((void *)0); |
684 | rcvmhdr.msg_controllen = 0; |
685 | |
686 | ip = (struct ip *)outpacket; |
687 | if (conf->lsrr != 0) { |
688 | u_char *p = (u_char *)(ip + 1); |
689 | |
690 | *p++ = IPOPT_NOP1; |
691 | *p++ = IPOPT_LSRR131; |
692 | *p++ = conf->lsrrlen - 1; |
693 | *p++ = IPOPT_MINOFF4; |
694 | conf->gateway[conf->lsrr] = to4.sin_addr; |
695 | for (i = 1; i <= conf->lsrr; i++) { |
696 | memcpy(p, &conf->gateway[i], |
697 | sizeof(struct in_addr)); |
698 | p += sizeof(struct in_addr); |
699 | } |
700 | ip->ip_dst = conf->gateway[0]; |
701 | } else |
702 | ip->ip_dst = to4.sin_addr; |
703 | ip->ip_off = htons(0)(__uint16_t)(__builtin_constant_p(0) ? (__uint16_t)(((__uint16_t )(0) & 0xffU) << 8 | ((__uint16_t)(0) & 0xff00U ) >> 8) : __swap16md(0)); |
704 | ip->ip_hl = (sizeof(struct ip) + conf->lsrrlen) >> 2; |
705 | ip->ip_p = conf->proto; |
706 | ip->ip_v = IPVERSION4; |
707 | ip->ip_tos = conf->tos; |
708 | |
709 | if (setsockopt(sndsock, IPPROTO_IP0, IP_HDRINCL2, |
710 | &on, sizeof(on)) == -1) |
711 | err(6, "IP_HDRINCL"); |
712 | |
713 | if (conf->source) { |
714 | memset(&from4, 0, sizeof(from4)); |
715 | from4.sin_family = AF_INET2; |
716 | if (inet_aton(conf->source, &from4.sin_addr) == 0) |
717 | errx(1, "unknown host %s", conf->source); |
718 | ip->ip_src = from4.sin_addr; |
719 | if (ouid != 0 && |
720 | (ntohl(from4.sin_addr.s_addr)(__uint32_t)(__builtin_constant_p(from4.sin_addr.s_addr) ? (__uint32_t )(((__uint32_t)(from4.sin_addr.s_addr) & 0xff) << 24 | ((__uint32_t)(from4.sin_addr.s_addr) & 0xff00) << 8 | ((__uint32_t)(from4.sin_addr.s_addr) & 0xff0000) >> 8 | ((__uint32_t)(from4.sin_addr.s_addr) & 0xff000000) >> 24) : __swap32md(from4.sin_addr.s_addr)) & 0xff000000U) == |
721 | 0x7f000000U && (ntohl(to4.sin_addr.s_addr)(__uint32_t)(__builtin_constant_p(to4.sin_addr.s_addr) ? (__uint32_t )(((__uint32_t)(to4.sin_addr.s_addr) & 0xff) << 24 | ((__uint32_t)(to4.sin_addr.s_addr) & 0xff00) << 8 | ((__uint32_t)(to4.sin_addr.s_addr) & 0xff0000) >> 8 | ((__uint32_t)(to4.sin_addr.s_addr) & 0xff000000) >> 24) : __swap32md(to4.sin_addr.s_addr)) & |
722 | 0xff000000U) != 0x7f000000U) |
723 | errx(1, "source is on 127/8, destination is" |
724 | " not"); |
725 | if (ouid && bind(sndsock, (struct sockaddr *)&from4, |
726 | sizeof(from4)) == -1) |
727 | err(1, "bind"); |
728 | } |
729 | packetlen = datalen; |
730 | break; |
731 | case AF_INET624: |
732 | /* |
733 | * packetlen is the size of the complete IP packet sent and |
734 | * reported in the first line of output. |
735 | * For IPv4 this is equal to datalen since we are constructing |
736 | * a raw packet. |
737 | * For IPv6 we need to always add the size of the IP6 header |
738 | * and for UDP packets the size of the UDP header since they |
739 | * are prepended to the packet by the kernel |
740 | */ |
741 | packetlen = sizeof(struct ip6_hdr); |
742 | switch (conf->proto) { |
743 | case IPPROTO_UDP17: |
744 | headerlen = sizeof(struct packetdata); |
745 | packetlen += sizeof(struct udphdr); |
746 | break; |
747 | case IPPROTO_ICMP1: |
748 | headerlen = sizeof(struct icmp6_hdr) + |
749 | sizeof(struct packetdata); |
750 | break; |
751 | default: |
752 | errx(1, "Unsupported proto: %hhu", conf->proto); |
753 | break; |
754 | } |
755 | |
756 | if (datalen < 0 || datalen > IP_MAXPACKET65535 - headerlen) |
757 | errx(1, "packet size must be 0 to %d.", |
758 | IP_MAXPACKET65535 - headerlen); |
759 | |
760 | datalen += headerlen; |
761 | packetlen += datalen; |
762 | |
763 | if ((outpacket = calloc(1, datalen)) == NULL((void *)0)) |
764 | err(1, "calloc"); |
765 | |
766 | /* initialize msghdr for receiving packets */ |
767 | rcviov[0].iov_base = (caddr_t)packet; |
768 | rcviov[0].iov_len = sizeof(packet); |
769 | rcvmhdr.msg_name = (caddr_t)&from6; |
770 | rcvmhdr.msg_namelen = sizeof(from6); |
771 | rcvmhdr.msg_iov = rcviov; |
772 | rcvmhdr.msg_iovlen = 1; |
773 | rcvcmsglen = CMSG_SPACE(sizeof(struct in6_pktinfo))((((unsigned long)(sizeof(struct cmsghdr)) + (sizeof(long) - 1 )) &~(sizeof(long) - 1)) + (((unsigned long)(sizeof(struct in6_pktinfo)) + (sizeof(long) - 1)) &~(sizeof(long) - 1) )) + |
774 | CMSG_SPACE(sizeof(int))((((unsigned long)(sizeof(struct cmsghdr)) + (sizeof(long) - 1 )) &~(sizeof(long) - 1)) + (((unsigned long)(sizeof(int)) + (sizeof(long) - 1)) &~(sizeof(long) - 1))); |
775 | |
776 | if ((rcvcmsgbuf = malloc(rcvcmsglen)) == NULL((void *)0)) |
777 | errx(1, "malloc"); |
778 | rcvmhdr.msg_control = (caddr_t) rcvcmsgbuf; |
779 | rcvmhdr.msg_controllen = rcvcmsglen; |
780 | |
781 | /* |
782 | * Send UDP or ICMP |
783 | */ |
784 | if (conf->proto == IPPROTO_ICMP1) { |
785 | close(sndsock); |
786 | sndsock = rcvsock; |
787 | } |
788 | |
789 | /* |
790 | * Source selection |
791 | */ |
792 | memset(&from6, 0, sizeof(from6)); |
793 | if (conf->source) { |
794 | memset(&hints, 0, sizeof(hints)); |
795 | hints.ai_family = AF_INET624; |
796 | hints.ai_socktype = SOCK_DGRAM2; /*dummy*/ |
797 | hints.ai_flags = AI_NUMERICHOST4; |
798 | if ((error = getaddrinfo(conf->source, "0", &hints, |
799 | &res))) |
800 | errx(1, "%s: %s", conf->source, |
801 | gai_strerror(error)); |
802 | memcpy(&from6, res->ai_addr, res->ai_addrlen); |
803 | freeaddrinfo(res); |
804 | } else { |
805 | struct sockaddr_in6 nxt; |
806 | int dummy; |
807 | |
808 | nxt = to6; |
809 | nxt.sin6_port = htons(DUMMY_PORT)(__uint16_t)(__builtin_constant_p(10010) ? (__uint16_t)(((__uint16_t )(10010) & 0xffU) << 8 | ((__uint16_t)(10010) & 0xff00U) >> 8) : __swap16md(10010)); |
810 | if ((dummy = socket(AF_INET624, SOCK_DGRAM2, 0)) == -1) |
811 | err(1, "socket"); |
812 | if (conf->rtableid > 0 && |
813 | setsockopt(dummy, SOL_SOCKET0xffff, SO_RTABLE0x1021, |
814 | &conf->rtableid, sizeof(conf->rtableid)) == -1) |
815 | err(1, "setsockopt(SO_RTABLE)"); |
816 | if (connect(dummy, (struct sockaddr *)&nxt, |
817 | nxt.sin6_len) == -1) |
818 | err(1, "connect"); |
819 | len = sizeof(from6); |
820 | if (getsockname(dummy, (struct sockaddr *)&from6, |
821 | &len) == -1) |
822 | err(1, "getsockname"); |
823 | close(dummy); |
824 | } |
825 | |
826 | from6.sin6_port = htons(0)(__uint16_t)(__builtin_constant_p(0) ? (__uint16_t)(((__uint16_t )(0) & 0xffU) << 8 | ((__uint16_t)(0) & 0xff00U ) >> 8) : __swap16md(0)); |
827 | if (bind(sndsock, (struct sockaddr *)&from6, from6.sin6_len) == -1) |
828 | err(1, "bind sndsock"); |
829 | |
830 | if (conf->tflag) { |
831 | if (setsockopt(sndsock, IPPROTO_IPV641, IPV6_TCLASS61, |
832 | &conf->tos, sizeof(conf->tos)) == -1) |
833 | err(6, "IPV6_TCLASS"); |
834 | } |
835 | |
836 | len = sizeof(from6); |
837 | if (getsockname(sndsock, (struct sockaddr *)&from6, &len) == -1) |
838 | err(1, "getsockname"); |
839 | srcport = ntohs(from6.sin6_port)(__uint16_t)(__builtin_constant_p(from6.sin6_port) ? (__uint16_t )(((__uint16_t)(from6.sin6_port) & 0xffU) << 8 | (( __uint16_t)(from6.sin6_port) & 0xff00U) >> 8) : __swap16md (from6.sin6_port)); |
840 | break; |
841 | default: |
842 | errx(1, "unsupported AF: %d", to->sa_family); |
843 | break; |
844 | } |
845 | |
846 | if (conf->dflag) { |
847 | (void) setsockopt(rcvsock, SOL_SOCKET0xffff, SO_DEBUG0x0001, |
848 | &on, sizeof(on)); |
849 | (void) setsockopt(sndsock, SOL_SOCKET0xffff, SO_DEBUG0x0001, |
850 | &on, sizeof(on)); |
851 | } |
852 | |
853 | if (setsockopt(sndsock, SOL_SOCKET0xffff, SO_SNDBUF0x1001, |
854 | &datalen, sizeof(datalen)) == -1) |
855 | err(6, "SO_SNDBUF"); |
856 | |
857 | if (conf->nflag && !conf->Aflag) { |
858 | if (pledge("stdio inet", NULL((void *)0)) == -1) |
859 | err(1, "pledge"); |
860 | } else { |
861 | if (pledge("stdio inet dns", NULL((void *)0)) == -1) |
862 | err(1, "pledge"); |
863 | } |
864 | |
865 | if (getnameinfo(to, to->sa_len, hbuf, |
866 | sizeof(hbuf), NULL((void *)0), 0, NI_NUMERICHOST1)) |
867 | strlcpy(hbuf, "(invalid)", sizeof(hbuf)); |
868 | fprintf(stderr(&__sF[2]), "%s to %s (%s)", __progname, hostname, hbuf); |
869 | if (conf->source) |
870 | fprintf(stderr(&__sF[2]), " from %s", conf->source); |
871 | fprintf(stderr(&__sF[2]), ", %u hops max, %d byte packets\n", conf->max_ttl, |
872 | packetlen); |
873 | (void) fflush(stderr(&__sF[2])); |
874 | |
875 | if (conf->first_ttl > 1) |
876 | printf("Skipping %u intermediate hops\n", conf->first_ttl - 1); |
877 | |
878 | event_init(); |
879 | |
880 | event_set(&sock_ev, rcvsock, EV_READ0x02 | EV_PERSIST0x10, sock_read, NULL((void *)0)); |
881 | event_add(&sock_ev, NULL((void *)0)); |
882 | evtimer_set(&timer_ev, send_timer, &timer_ev)event_set(&timer_ev, -1, 0, send_timer, &timer_ev); |
883 | evtimer_add(&timer_ev, &tv)event_add(&timer_ev, &tv); |
884 | event_dispatch(); |
885 | } |
886 | |
887 | void |
888 | usage(void) |
889 | { |
890 | if (v6flag) { |
891 | fprintf(stderr(&__sF[2]), "usage: %s " |
892 | "[-ADdIlnSv] [-f first_hop] [-m max_hop] [-p port]\n" |
893 | "\t[-q nqueries] [-s sourceaddr] [-t toskeyword] [-V rtable] " |
894 | "[-w waittime]\n\thost [datalen]\n", __progname); |
895 | } else { |
896 | fprintf(stderr(&__sF[2]), |
897 | "usage: %s [-ADdIlnSvx] [-f first_ttl] [-g gateway_addr] " |
898 | "[-m max_ttl]\n" |
899 | "\t[-P proto] [-p port] [-q nqueries] [-s sourceaddr]\n" |
900 | "\t[-t toskeyword] " |
901 | "[-V rtable] [-w waittime] host [datalen]\n", |
902 | __progname); |
903 | } |
904 | exit(1); |
905 | } |
906 | |
907 | void |
908 | sock_read(int fd, short events, void *arg) |
909 | { |
910 | struct ip *ip; |
911 | struct timeval t2, tv = {0, 0}; |
912 | int pkg_ok, cc, recv_seq, recv_seq_row; |
913 | char hbuf[NI_MAXHOST256]; |
914 | |
915 | cc = recvmsg(rcvsock, &rcvmhdr, 0); |
916 | |
917 | if (cc == 0) |
918 | return; |
919 | |
920 | evtimer_add(&timer_ev, &tv)event_add(&timer_ev, &tv); |
921 | |
922 | gettime(&t2); |
923 | |
924 | pkg_ok = packet_ok(conf, to->sa_family, &rcvmhdr, cc, &recv_seq); |
925 | |
926 | /* Skip wrong packet */ |
927 | if (pkg_ok == 0) |
928 | goto out; |
929 | |
930 | /* skip corrupt sequence number */ |
931 | if (recv_seq < 0 || recv_seq >= conf->max_ttl * conf->nprobes) |
932 | goto out; |
933 | |
934 | recv_seq_row = recv_seq / conf->nprobes; |
935 | |
936 | /* skipping dup */ |
937 | if (tr_results[recv_seq].dup++) |
938 | goto out; |
939 | |
940 | switch (to->sa_family) { |
941 | case AF_INET2: |
942 | ip = (struct ip *)packet; |
943 | |
944 | print(conf, from, cc - (ip->ip_hl << 2), inet_ntop(AF_INET2, |
945 | &ip->ip_dst, hbuf, sizeof(hbuf)), &tr_results[recv_seq]); |
946 | break; |
947 | case AF_INET624: |
948 | print(conf, from, cc, rcvpktinfo ? inet_ntop(AF_INET624, |
949 | &rcvpktinfo->ipi6_addr, hbuf, sizeof(hbuf)) : "?", |
950 | &tr_results[recv_seq]); |
951 | break; |
952 | default: |
953 | errx(1, "unsupported AF: %d", to->sa_family); |
954 | } |
955 | |
956 | tr_results[recv_seq].t2 = t2; |
957 | tr_results[recv_seq].resp_ttl = v6flag ? rcvhlim : ip->ip_ttl; |
958 | |
959 | waiting_ttls[recv_seq_row]--; |
960 | |
961 | if (pkg_ok == -2) { |
962 | if ((v6flag && rcvhlim <= 1) || |
963 | (!v6flag && ip->ip_ttl <=1)) |
964 | snprintf(tr_results[recv_seq].icmp_code, |
965 | sizeof(tr_results[recv_seq].icmp_code), "%s", " !"); |
966 | tr_results[recv_seq].got_there++; |
967 | } else { |
968 | if (to->sa_family == AF_INET2 && conf->tflag) |
969 | check_tos(ip, &last_tos, &tr_results[recv_seq]); |
970 | if (pkg_ok != -1) { |
971 | icmp_code(to->sa_family, pkg_ok - 1, |
972 | &tr_results[recv_seq].got_there, |
973 | &tr_results[recv_seq].unreachable, |
974 | &tr_results[recv_seq]); |
975 | } |
976 | } |
977 | |
978 | if (cc && ((recv_seq + 1) % conf->nprobes) == 0 && |
979 | (conf->xflag || conf->verbose)) |
980 | print_exthdr(packet, cc, &tr_results[recv_seq]); |
981 | out: |
982 | catchup_result_rows(tr_results, conf); |
983 | } |
984 | |
985 | void |
986 | send_timer(int fd, short events, void *arg) |
987 | { |
988 | static int seq; |
989 | struct timeval tv = {0, 30000}, t1; |
990 | struct event *ev = arg; |
991 | int ttl; |
992 | |
993 | evtimer_add(ev, &tv)event_add(ev, &tv); |
994 | |
995 | ttl = conf->first_ttl + seq / conf->nprobes; |
996 | if (ttl <= conf->max_ttl) { |
997 | gettime(&t1); |
998 | tr_results[seq].seq = seq; |
999 | tr_results[seq].row = seq / conf->nprobes; |
1000 | tr_results[seq].ttl = ttl; |
1001 | tr_results[seq].t1 = t1; |
1002 | send_probe(conf, seq, ttl, to); |
1003 | seq++; |
1004 | } |
1005 | |
1006 | catchup_result_rows(tr_results, conf); |
1007 | |
1008 | } |