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Commit | Line | Data |
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4d9ad5dc MS |
1 | /* |
2 | * Multicast Traceroute for FRRouting | |
3 | * Copyright (C) 2018 Mladen Sablic | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License as published by | |
7 | * the Free Software Foundation; either version 2 of the License, or | |
8 | * (at your option) any later version. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, but | |
11 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | * General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License along | |
16 | * with this program; see the file COPYING; if not, write to the Free Software | |
17 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
18 | */ | |
19 | ||
b45ac5f5 DL |
20 | #ifdef HAVE_CONFIG_H |
21 | #include "config.h" | |
22 | #endif | |
23 | ||
4d9ad5dc MS |
24 | #ifdef __linux__ |
25 | ||
26 | #include "pim_igmp_mtrace.h" | |
27 | ||
28 | #include "checksum.h" | |
71e55fb2 | 29 | #include "prefix.h" |
4d9ad5dc MS |
30 | #include "mtracebis_routeget.h" |
31 | ||
32 | #include <sys/select.h> | |
33 | #include <netinet/in.h> | |
34 | #include <arpa/inet.h> | |
35 | #include <unistd.h> | |
36 | #include <sys/types.h> | |
37 | #include <sys/time.h> | |
38 | #include <stdio.h> | |
39 | #include <stdlib.h> | |
40 | #include <string.h> | |
41 | #include <time.h> | |
42 | #include <net/if.h> | |
5b02bd3a DS |
43 | #include <unistd.h> |
44 | #include <getopt.h> | |
04a2eef3 | 45 | #include <netdb.h> |
4d9ad5dc MS |
46 | |
47 | #define MTRACEBIS_VERSION "0.1" | |
48 | #define MTRACE_TIMEOUT (5) | |
49 | ||
50 | #define IP_HDR_LEN (sizeof(struct ip)) | |
51 | #define IP_RA_LEN (4) | |
52 | #define MTRACE_BUF_LEN (MTRACE_HDR_SIZE + (MTRACE_MAX_HOPS * MTRACE_RSP_SIZE)) | |
53 | #define IP_AND_MTRACE_BUF_LEN (IP_HDR_LEN + IP_RA_LEN + MTRACE_BUF_LEN) | |
54 | ||
55 | static const char *progname; | |
56 | static void usage(void) | |
57 | { | |
71e55fb2 MS |
58 | fprintf(stderr, "Usage : %s <multicast source> [<multicast group>]\n", |
59 | progname); | |
4d9ad5dc MS |
60 | } |
61 | static void version(void) | |
62 | { | |
63 | fprintf(stderr, "%s %s\n", progname, MTRACEBIS_VERSION); | |
64 | } | |
65 | ||
04a2eef3 MS |
66 | static void print_host(struct in_addr addr) |
67 | { | |
68 | struct hostent *h; | |
69 | ||
70 | h = gethostbyaddr(&addr, sizeof(addr), AF_INET); | |
71 | if (h == NULL) | |
72 | printf("?"); | |
73 | else | |
74 | printf("%s", h->h_name); | |
75 | printf(" (%s) ", inet_ntoa(addr)); | |
76 | } | |
77 | ||
78 | static void print_line_no(int i) | |
79 | { | |
80 | printf("%3d ", -i); | |
81 | } | |
82 | ||
83 | static const char *rtg_proto_str(enum mtrace_rtg_proto proto) | |
84 | { | |
85 | static char buf[80]; | |
86 | ||
87 | buf[0] = '\0'; | |
88 | ||
89 | switch (proto) { | |
90 | case MTRACE_RTG_PROTO_DVMRP: | |
91 | return "DVMRP"; | |
92 | case MTRACE_RTG_PROTO_MOSPF: | |
93 | return "MOSPF"; | |
94 | case MTRACE_RTG_PROTO_PIM: | |
95 | return "PIM"; | |
96 | case MTRACE_RTG_PROTO_CBT: | |
97 | return "CBT"; | |
98 | case MTRACE_RTG_PROTO_PIM_SPECIAL: | |
99 | return "PIM special"; | |
100 | case MTRACE_RTG_PROTO_PIM_STATIC: | |
101 | return "PIM static"; | |
102 | case MTRACE_RTG_PROTO_DVMRP_STATIC: | |
103 | return "DVMRP static"; | |
104 | case MTRACE_RTG_PROTO_PIM_MBGP: | |
105 | return "PIM MBGP"; | |
106 | case MTRACE_RTG_PROTO_CBT_SPECIAL: | |
107 | return "CBT special"; | |
108 | case MTRACE_RTG_PROTO_CBT_STATIC: | |
109 | return "CBT static"; | |
110 | case MTRACE_RTG_PROTO_PIM_ASSERT: | |
111 | return "PIM assert"; | |
112 | default: | |
113 | sprintf(buf, "unknown protocol (%d)", proto); | |
114 | return buf; | |
115 | } | |
116 | } | |
117 | ||
118 | static void print_rtg_proto(uint32_t rtg_proto) | |
119 | { | |
120 | printf("%s", rtg_proto_str(rtg_proto)); | |
121 | } | |
122 | ||
123 | static void print_fwd_ttl(uint32_t fwd_ttl) | |
124 | { | |
125 | printf("thresh^ %d", fwd_ttl); | |
126 | } | |
127 | ||
128 | static const char *fwd_code_str(enum mtrace_fwd_code code) | |
129 | { | |
130 | static char buf[80]; | |
131 | ||
132 | buf[0] = '\0'; | |
133 | ||
134 | switch (code) { | |
135 | case MTRACE_FWD_CODE_NO_ERROR: | |
136 | return "no error"; | |
137 | case MTRACE_FWD_CODE_WRONG_IF: | |
138 | return "wrong interface"; | |
139 | case MTRACE_FWD_CODE_PRUNE_SENT: | |
140 | return "prune sent"; | |
141 | case MTRACE_FWD_CODE_PRUNE_RCVD: | |
142 | return "prune received"; | |
143 | case MTRACE_FWD_CODE_SCOPED: | |
144 | return "scoped"; | |
145 | case MTRACE_FWD_CODE_NO_ROUTE: | |
146 | return "no route"; | |
147 | case MTRACE_FWD_CODE_WRONG_LAST_HOP: | |
148 | return "wrong last hop"; | |
149 | case MTRACE_FWD_CODE_NOT_FORWARDING: | |
150 | return "not forwarding"; | |
151 | case MTRACE_FWD_CODE_REACHED_RP: | |
152 | return "reached RP"; | |
153 | case MTRACE_FWD_CODE_RPF_IF: | |
154 | return "RPF interface"; | |
155 | case MTRACE_FWD_CODE_NO_MULTICAST: | |
156 | return "no multicast"; | |
157 | case MTRACE_FWD_CODE_INFO_HIDDEN: | |
158 | return "info hidden"; | |
159 | case MTRACE_FWD_CODE_NO_SPACE: | |
160 | return "no space"; | |
161 | case MTRACE_FWD_CODE_OLD_ROUTER: | |
162 | return "old router"; | |
163 | case MTRACE_FWD_CODE_ADMIN_PROHIB: | |
164 | return "admin. prohib."; | |
165 | default: | |
166 | sprintf(buf, "unknown fwd. code (%d)", code); | |
167 | return buf; | |
168 | } | |
169 | } | |
170 | ||
171 | static void print_fwd_code(uint32_t fwd_code) | |
172 | { | |
173 | printf("%s", fwd_code_str(fwd_code)); | |
174 | } | |
175 | ||
176 | static void print_rsp(struct igmp_mtrace_rsp *rsp) | |
177 | { | |
178 | print_host(rsp->outgoing); | |
71e55fb2 | 179 | if (rsp->fwd_code == 0 || rsp->fwd_code == MTRACE_FWD_CODE_REACHED_RP) { |
04a2eef3 MS |
180 | print_rtg_proto(rsp->rtg_proto); |
181 | printf(" "); | |
71e55fb2 MS |
182 | if (rsp->fwd_code == MTRACE_FWD_CODE_REACHED_RP) |
183 | printf("(RP) "); | |
184 | if (rsp->rtg_proto == MTRACE_RTG_PROTO_PIM) { | |
185 | switch (rsp->src_mask) { | |
186 | case MTRACE_SRC_MASK_GROUP: | |
187 | printf("(*,G) "); | |
188 | break; | |
189 | case MTRACE_SRC_MASK_SOURCE: | |
190 | printf("(S,G) "); | |
191 | break; | |
192 | } | |
193 | } | |
04a2eef3 MS |
194 | print_fwd_ttl(rsp->fwd_ttl); |
195 | } else { | |
196 | print_fwd_code(rsp->fwd_code); | |
197 | } | |
198 | printf("\n"); | |
199 | } | |
200 | ||
201 | static void print_dest(struct igmp_mtrace *mtrace) | |
202 | { | |
203 | print_line_no(0); | |
204 | print_host(mtrace->dst_addr); | |
205 | printf("\n"); | |
206 | } | |
207 | ||
208 | static void print_summary(struct igmp_mtrace *mtrace, int hops, long msec) | |
209 | { | |
210 | int i; | |
211 | int t = 0; | |
212 | ||
213 | for (i = 0; i < hops; i++) | |
214 | t += mtrace->rsp[i].fwd_ttl; | |
215 | ||
216 | printf("Round trip time %ld ms; total ttl of %d required.\n", msec, t); | |
217 | } | |
218 | ||
219 | static void print_responses(struct igmp_mtrace *mtrace, int hops, long msec) | |
220 | { | |
221 | int i; | |
222 | ||
223 | print_dest(mtrace); | |
224 | ||
225 | for (i = 0; i < hops; i++) { | |
226 | print_line_no(i + 1); | |
227 | print_rsp(&mtrace->rsp[i]); | |
228 | } | |
229 | print_summary(mtrace, hops, msec); | |
230 | } | |
231 | ||
4d9ad5dc MS |
232 | static int send_query(int fd, struct in_addr to_addr, |
233 | struct igmp_mtrace *mtrace) | |
234 | { | |
235 | struct sockaddr_in to; | |
236 | socklen_t tolen; | |
237 | int sent; | |
238 | ||
239 | memset(&to, 0, sizeof(to)); | |
240 | to.sin_family = AF_INET; | |
241 | to.sin_addr = to_addr; | |
242 | tolen = sizeof(to); | |
243 | ||
244 | sent = sendto(fd, (char *)mtrace, sizeof(*mtrace), MSG_DONTWAIT, | |
245 | (struct sockaddr *)&to, tolen); | |
246 | ||
247 | if (sent < 1) | |
248 | return -1; | |
249 | return 0; | |
250 | } | |
251 | ||
252 | static void print_query(struct igmp_mtrace *mtrace) | |
253 | { | |
254 | char src_str[INET_ADDRSTRLEN]; | |
255 | char dst_str[INET_ADDRSTRLEN]; | |
256 | char grp_str[INET_ADDRSTRLEN]; | |
257 | ||
258 | printf("* Mtrace from %s to %s via group %s\n", | |
259 | inet_ntop(AF_INET, &mtrace->src_addr, src_str, sizeof(src_str)), | |
260 | inet_ntop(AF_INET, &mtrace->dst_addr, dst_str, sizeof(dst_str)), | |
261 | inet_ntop(AF_INET, &mtrace->grp_addr, grp_str, sizeof(grp_str))); | |
262 | } | |
263 | ||
04a2eef3 | 264 | static int recv_response(int fd, int *hops, struct igmp_mtrace *mtracer) |
4d9ad5dc MS |
265 | { |
266 | int recvd; | |
267 | char mtrace_buf[IP_AND_MTRACE_BUF_LEN]; | |
268 | struct ip *ip; | |
269 | struct igmp_mtrace *mtrace; | |
270 | int mtrace_len; | |
271 | int responses; | |
d7c0a89a | 272 | unsigned short sum; |
813099f0 | 273 | size_t mtrace_off; |
274 | size_t ip_len; | |
4d9ad5dc MS |
275 | |
276 | recvd = recvfrom(fd, mtrace_buf, IP_AND_MTRACE_BUF_LEN, 0, NULL, 0); | |
277 | ||
278 | if (recvd < 1) { | |
279 | fprintf(stderr, "recvfrom error: %s\n", strerror(errno)); | |
280 | return -1; | |
281 | } | |
282 | ||
283 | if (recvd < (int)sizeof(struct ip)) { | |
284 | fprintf(stderr, "no ip header\n"); | |
285 | return -1; | |
286 | } | |
287 | ||
288 | ip = (struct ip *)mtrace_buf; | |
289 | ||
290 | if (ip->ip_v != 4) { | |
291 | fprintf(stderr, "IP not version 4\n"); | |
292 | return -1; | |
293 | } | |
294 | ||
295 | sum = ip->ip_sum; | |
296 | ip->ip_sum = 0; | |
297 | ||
298 | if (sum != in_cksum(ip, ip->ip_hl * 4)) | |
299 | return -1; | |
300 | ||
813099f0 | 301 | /* Header overflow check */ |
302 | mtrace_off = 4 * ip->ip_hl; | |
303 | if (mtrace_off > MTRACE_BUF_LEN) | |
18e994a0 | 304 | return -1; |
305 | ||
813099f0 | 306 | /* Underflow/overflow check */ |
307 | ip_len = ntohs(ip->ip_len); | |
308 | if (ip_len < mtrace_off || ip_len < MTRACE_HDR_SIZE | |
309 | || ip_len > MTRACE_BUF_LEN) | |
4d9ad5dc MS |
310 | return -1; |
311 | ||
813099f0 | 312 | mtrace_len = ip_len - mtrace_off; |
313 | mtrace = (struct igmp_mtrace *)(mtrace_buf + mtrace_off); | |
d94023d8 | 314 | |
4d9ad5dc MS |
315 | sum = mtrace->checksum; |
316 | mtrace->checksum = 0; | |
317 | if (sum != in_cksum(mtrace, mtrace_len)) { | |
318 | fprintf(stderr, "mtrace checksum wrong\n"); | |
319 | return -1; | |
320 | } | |
321 | ||
322 | if (mtrace->type != PIM_IGMP_MTRACE_RESPONSE) | |
323 | return -1; | |
324 | ||
325 | ||
326 | responses = mtrace_len - sizeof(struct igmp_mtrace); | |
327 | responses /= sizeof(struct igmp_mtrace_rsp); | |
328 | ||
04a2eef3 MS |
329 | if (responses > MTRACE_MAX_HOPS) { |
330 | fprintf(stderr, "mtrace too large\n"); | |
331 | return -1; | |
332 | } | |
4d9ad5dc MS |
333 | |
334 | if (hops) | |
335 | *hops = responses; | |
336 | ||
04a2eef3 MS |
337 | if (mtracer) |
338 | memcpy(mtracer, mtrace, mtrace_len); | |
4d9ad5dc MS |
339 | |
340 | return 0; | |
341 | } | |
342 | ||
04a2eef3 MS |
343 | static int wait_for_response(int fd, int *hops, struct igmp_mtrace *mtrace, |
344 | long *ret_msec) | |
4d9ad5dc MS |
345 | { |
346 | fd_set readfds; | |
347 | struct timeval timeout; | |
a2b6e694 | 348 | int ret; |
4d9ad5dc MS |
349 | long msec, rmsec, tmsec; |
350 | ||
351 | FD_ZERO(&readfds); | |
352 | FD_SET(fd, &readfds); | |
353 | ||
354 | memset(&timeout, 0, sizeof(timeout)); | |
355 | ||
356 | timeout.tv_sec = MTRACE_TIMEOUT; | |
357 | ||
358 | tmsec = timeout.tv_sec * 1000 + timeout.tv_usec / 1000; | |
359 | do { | |
360 | ret = select(fd + 1, &readfds, NULL, NULL, &timeout); | |
361 | if (ret <= 0) | |
362 | return ret; | |
363 | rmsec = timeout.tv_sec * 1000 + timeout.tv_usec / 1000; | |
364 | msec = tmsec - rmsec; | |
04a2eef3 MS |
365 | } while (recv_response(fd, hops, mtrace) != 0); |
366 | ||
367 | if (ret_msec) | |
368 | *ret_msec = msec; | |
4d9ad5dc MS |
369 | |
370 | return ret; | |
371 | } | |
372 | ||
04a2eef3 MS |
373 | static bool check_end(struct igmp_mtrace *mtrace, int hops) |
374 | { | |
375 | return mtrace->src_addr.s_addr == mtrace->rsp[hops - 1].prev_hop.s_addr; | |
376 | } | |
377 | ||
4d9ad5dc MS |
378 | int main(int argc, char *const argv[]) |
379 | { | |
380 | struct in_addr mc_source; | |
71e55fb2 | 381 | struct in_addr mc_group; |
4d9ad5dc MS |
382 | struct in_addr iface_addr; |
383 | struct in_addr gw_addr; | |
384 | struct in_addr mtrace_addr; | |
385 | struct igmp_mtrace mtrace; | |
04a2eef3 | 386 | struct igmp_mtrace *mtracep; |
4d9ad5dc MS |
387 | int hops = 255; |
388 | int rhops; | |
389 | int maxhops = 255; | |
390 | int perhop = 3; | |
391 | int ifindex; | |
392 | int unicast = 1; | |
393 | int ttl = 64; | |
394 | int fd = -1; | |
395 | int ret = -1; | |
396 | int c; | |
04a2eef3 | 397 | long msec; |
4d9ad5dc MS |
398 | int i, j; |
399 | char ifname[IF_NAMESIZE]; | |
04a2eef3 | 400 | char mbuf[MTRACE_BUF_LEN]; |
71e55fb2 | 401 | bool not_group; |
4d9ad5dc MS |
402 | |
403 | mtrace_addr.s_addr = inet_addr("224.0.1.32"); | |
404 | ||
405 | uid_t uid = getuid(); | |
406 | ||
407 | if (uid != 0) { | |
408 | printf("must run as root\n"); | |
409 | exit(EXIT_FAILURE); | |
410 | } | |
411 | ||
412 | if (argc <= 0) | |
413 | progname = "mtracebis"; | |
414 | else | |
415 | progname = argv[0]; | |
416 | ||
71e55fb2 | 417 | if (argc != 2 && argc != 3) { |
4d9ad5dc MS |
418 | usage(); |
419 | exit(EXIT_FAILURE); | |
420 | } | |
421 | ||
422 | while (1) { | |
423 | static struct option long_options[] = { | |
424 | {"help", no_argument, 0, 'h'}, | |
425 | {"version", no_argument, 0, 'v'}, | |
996c9314 | 426 | {0, 0, 0, 0}}; |
4d9ad5dc MS |
427 | int option_index = 0; |
428 | ||
429 | c = getopt_long(argc, argv, "vh", long_options, &option_index); | |
430 | ||
431 | if (c == -1) | |
432 | break; | |
433 | ||
434 | switch (c) { | |
435 | case 'h': | |
436 | usage(); | |
437 | exit(0); | |
438 | case 'v': | |
439 | version(); | |
440 | exit(0); | |
441 | default: | |
442 | usage(); | |
443 | exit(EXIT_FAILURE); | |
444 | } | |
445 | } | |
446 | if (inet_pton(AF_INET, argv[1], &mc_source) != 1) { | |
447 | usage(); | |
71e55fb2 | 448 | fprintf(stderr, "%s: %s is not a valid IPv4 address\n", argv[0], |
4d9ad5dc MS |
449 | argv[1]); |
450 | exit(EXIT_FAILURE); | |
451 | } | |
452 | ||
71e55fb2 MS |
453 | mc_group.s_addr = 0; |
454 | not_group = false; | |
455 | ||
456 | if (argc == 3) { | |
457 | if (inet_pton(AF_INET, argv[2], &mc_group) != 1) | |
458 | not_group = true; | |
459 | if (!not_group && !IPV4_CLASS_DE(ntohl(mc_group.s_addr))) | |
460 | not_group = true; | |
461 | } | |
462 | ||
463 | if (not_group) { | |
464 | usage(); | |
465 | fprintf(stderr, "%s: %s is not a valid IPv4 group address\n", | |
466 | argv[0], argv[2]); | |
467 | exit(EXIT_FAILURE); | |
468 | } | |
469 | ||
4d9ad5dc MS |
470 | ifindex = routeget(mc_source, &iface_addr, &gw_addr); |
471 | if (ifindex < 0) { | |
472 | fprintf(stderr, "%s: failed to get route to source %s\n", | |
473 | argv[0], argv[1]); | |
474 | exit(EXIT_FAILURE); | |
475 | } | |
476 | ||
477 | if (if_indextoname(ifindex, ifname) == NULL) { | |
478 | fprintf(stderr, "%s: if_indextoname error: %s\n", argv[0], | |
479 | strerror(errno)); | |
480 | exit(EXIT_FAILURE); | |
481 | } | |
482 | ||
483 | /* zero mtrace struct */ | |
484 | memset((char *)&mtrace, 0, sizeof(mtrace)); | |
485 | ||
486 | /* set up query */ | |
487 | mtrace.type = PIM_IGMP_MTRACE_QUERY_REQUEST; | |
488 | mtrace.hops = hops; | |
489 | mtrace.checksum = 0; | |
71e55fb2 | 490 | mtrace.grp_addr = mc_group; |
4d9ad5dc MS |
491 | mtrace.src_addr = mc_source; |
492 | mtrace.dst_addr = iface_addr; | |
493 | mtrace.rsp_addr = unicast ? iface_addr : mtrace_addr; | |
494 | mtrace.rsp_ttl = ttl; | |
495 | mtrace.qry_id = 0xffffff & time(NULL); | |
496 | ||
497 | mtrace.checksum = in_cksum(&mtrace, sizeof(mtrace)); | |
498 | ||
499 | fd = socket(AF_INET, SOCK_RAW, IPPROTO_IGMP); | |
500 | ||
501 | if (fd < 1) { | |
502 | fprintf(stderr, "%s: socket error: %s\n", argv[0], | |
503 | strerror(errno)); | |
504 | exit(EXIT_FAILURE); | |
505 | } | |
506 | ||
507 | ret = setsockopt(fd, SOL_SOCKET, SO_BINDTODEVICE, ifname, | |
508 | strlen(ifname)); | |
509 | ||
510 | if (ret < 0) { | |
511 | fprintf(stderr, "%s: setsockopt error: %s\n", argv[0], | |
512 | strerror(errno)); | |
513 | ret = EXIT_FAILURE; | |
514 | goto close_fd; | |
515 | } | |
516 | ||
517 | print_query(&mtrace); | |
518 | if (send_query(fd, gw_addr, &mtrace) < 0) { | |
519 | fprintf(stderr, "%s: sendto error: %s\n", argv[0], | |
520 | strerror(errno)); | |
521 | ret = EXIT_FAILURE; | |
522 | goto close_fd; | |
523 | } | |
524 | printf("Querying full reverse path...\n"); | |
04a2eef3 MS |
525 | mtracep = (struct igmp_mtrace *)mbuf; |
526 | ret = wait_for_response(fd, &rhops, mtracep, &msec); | |
4d9ad5dc | 527 | if (ret > 0) { |
04a2eef3 | 528 | print_responses(mtracep, rhops, msec); |
4d9ad5dc MS |
529 | ret = 0; |
530 | goto close_fd; | |
531 | } | |
532 | if (ret < 0) { | |
533 | fprintf(stderr, "%s: select error: %s\n", argv[0], | |
534 | strerror(errno)); | |
535 | ret = EXIT_FAILURE; | |
536 | goto close_fd; | |
537 | } | |
538 | printf(" * "); | |
539 | printf("switching to hop-by-hop:\n"); | |
04a2eef3 | 540 | print_dest(&mtrace); |
4d9ad5dc | 541 | for (i = 1; i < maxhops; i++) { |
04a2eef3 | 542 | print_line_no(i); |
4d9ad5dc MS |
543 | mtrace.hops = i; |
544 | for (j = 0; j < perhop; j++) { | |
545 | mtrace.qry_id++; | |
546 | mtrace.checksum = 0; | |
547 | mtrace.checksum = in_cksum(&mtrace, sizeof(mtrace)); | |
548 | if (send_query(fd, gw_addr, &mtrace) < 0) { | |
549 | fprintf(stderr, "%s: sendto error: %s\n", | |
550 | argv[0], strerror(errno)); | |
551 | ret = EXIT_FAILURE; | |
552 | goto close_fd; | |
553 | } | |
04a2eef3 | 554 | ret = wait_for_response(fd, &rhops, mtracep, &msec); |
4d9ad5dc | 555 | if (ret > 0) { |
04a2eef3 MS |
556 | if (check_end(mtracep, rhops)) { |
557 | print_rsp(&mtracep->rsp[rhops - 1]); | |
558 | print_summary(mtracep, rhops, msec); | |
559 | ret = 0; | |
560 | goto close_fd; | |
561 | } | |
4d9ad5dc | 562 | if (i > rhops) { |
04a2eef3 | 563 | printf(" * ...giving up.\n"); |
4d9ad5dc MS |
564 | ret = 0; |
565 | goto close_fd; | |
566 | } | |
04a2eef3 | 567 | print_rsp(&mtracep->rsp[rhops - 1]); |
4d9ad5dc MS |
568 | break; |
569 | } | |
570 | printf(" *"); | |
571 | } | |
572 | if (ret <= 0) | |
573 | printf("\n"); | |
574 | } | |
575 | ret = 0; | |
576 | close_fd: | |
577 | close(fd); | |
578 | exit(ret); | |
579 | } | |
580 | ||
581 | #else /* __linux__ */ | |
582 | ||
583 | #include <stdio.h> | |
584 | #include <stdlib.h> | |
585 | ||
586 | int main(int argc, char *argv[]) | |
587 | { | |
588 | printf("%s implemented only for GNU/Linux\n", argv[0]); | |
589 | exit(0); | |
590 | } | |
591 | ||
592 | #endif /* __linux__ */ |