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1 | /* | |
2 | * q_netem.c NETEM. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU General Public License | |
6 | * as published by the Free Software Foundation; either version | |
7 | * 2 of the License, or (at your option) any later version. | |
8 | * | |
9 | * Authors: Stephen Hemminger <shemminger@linux-foundation.org> | |
10 | * | |
11 | */ | |
12 | ||
13 | #include <stdio.h> | |
14 | #include <stdlib.h> | |
15 | #include <math.h> | |
16 | #include <ctype.h> | |
17 | #include <unistd.h> | |
18 | #include <fcntl.h> | |
19 | #include <stdint.h> | |
20 | #include <sys/socket.h> | |
21 | #include <netinet/in.h> | |
22 | #include <arpa/inet.h> | |
23 | #include <string.h> | |
24 | #include <errno.h> | |
25 | ||
26 | #include "utils.h" | |
27 | #include "tc_util.h" | |
28 | #include "tc_common.h" | |
29 | ||
30 | static void explain(void) | |
31 | { | |
32 | fprintf(stderr, | |
33 | "Usage: ... netem [ limit PACKETS ]\n" \ | |
34 | " [ delay TIME [ JITTER [CORRELATION]]]\n" \ | |
35 | " [ distribution {uniform|normal|pareto|paretonormal} ]\n" \ | |
36 | " [ corrupt PERCENT [CORRELATION]]\n" \ | |
37 | " [ duplicate PERCENT [CORRELATION]]\n" \ | |
38 | " [ loss random PERCENT [CORRELATION]]\n" \ | |
39 | " [ loss state P13 [P31 [P32 [P23 P14]]]\n" \ | |
40 | " [ loss gemodel PERCENT [R [1-H [1-K]]]\n" \ | |
41 | " [ ecn ]\n" \ | |
42 | " [ reorder PERCENT [CORRELATION] [ gap DISTANCE ]]\n" \ | |
43 | " [ rate RATE [PACKETOVERHEAD] [CELLSIZE] [CELLOVERHEAD]]\n" \ | |
44 | " [ slot MIN_DELAY [MAX_DELAY] [packets MAX_PACKETS]" \ | |
45 | " [bytes MAX_BYTES]]\n" \ | |
46 | " [ slot distribution" \ | |
47 | " {uniform|normal|pareto|paretonormal|custom} DELAY JITTER" \ | |
48 | " [packets MAX_PACKETS] [bytes MAX_BYTES]]\n"); | |
49 | } | |
50 | ||
51 | static void explain1(const char *arg) | |
52 | { | |
53 | fprintf(stderr, "Illegal \"%s\"\n", arg); | |
54 | } | |
55 | ||
56 | /* Upper bound on size of distribution | |
57 | * really (TCA_BUF_MAX - other headers) / sizeof (__s16) | |
58 | */ | |
59 | #define MAX_DIST (16*1024) | |
60 | ||
61 | /* Print values only if they are non-zero */ | |
62 | static void __print_int_opt(const char *label_json, const char *label_fp, | |
63 | int val) | |
64 | { | |
65 | print_int(PRINT_ANY, label_json, val ? label_fp : "", val); | |
66 | } | |
67 | #define PRINT_INT_OPT(label, val) \ | |
68 | __print_int_opt(label, " " label " %d", (val)) | |
69 | ||
70 | /* Time print prints normally with varying units, but for JSON prints | |
71 | * in seconds (1ms vs 0.001). | |
72 | */ | |
73 | static void __print_time64(const char *label_json, const char *label_fp, | |
74 | __u64 val) | |
75 | { | |
76 | SPRINT_BUF(b1); | |
77 | ||
78 | print_string(PRINT_FP, NULL, label_fp, sprint_time64(val, b1)); | |
79 | print_float(PRINT_JSON, label_json, NULL, val / 1000000000.); | |
80 | } | |
81 | #define __PRINT_TIME64(label_json, label_fp, val) \ | |
82 | __print_time64(label_json, label_fp " %s", (val)) | |
83 | #define PRINT_TIME64(label, val) __PRINT_TIME64(label, " " label, (val)) | |
84 | ||
85 | /* Percent print prints normally in percentage points, but for JSON prints | |
86 | * an absolute value (1% vs 0.01). | |
87 | */ | |
88 | static void __print_percent(const char *label_json, const char *label_fp, | |
89 | __u32 per) | |
90 | { | |
91 | print_float(PRINT_FP, NULL, label_fp, (100. * per) / UINT32_MAX); | |
92 | print_float(PRINT_JSON, label_json, NULL, (1. * per) / UINT32_MAX); | |
93 | } | |
94 | #define __PRINT_PERCENT(label_json, label_fp, per) \ | |
95 | __print_percent(label_json, label_fp " %g%%", (per)) | |
96 | #define PRINT_PERCENT(label, per) __PRINT_PERCENT(label, " " label, (per)) | |
97 | ||
98 | /* scaled value used to percent of maximum. */ | |
99 | static void set_percent(__u32 *percent, double per) | |
100 | { | |
101 | *percent = rint(per * UINT32_MAX); | |
102 | } | |
103 | ||
104 | static int get_percent(__u32 *percent, const char *str) | |
105 | { | |
106 | double per; | |
107 | ||
108 | if (parse_percent(&per, str)) | |
109 | return -1; | |
110 | ||
111 | set_percent(percent, per); | |
112 | return 0; | |
113 | } | |
114 | ||
115 | static void print_corr(bool present, __u32 value) | |
116 | { | |
117 | if (!is_json_context()) { | |
118 | if (present) | |
119 | __PRINT_PERCENT("", "", value); | |
120 | } else { | |
121 | PRINT_PERCENT("correlation", value); | |
122 | } | |
123 | } | |
124 | ||
125 | /* | |
126 | * Simplistic file parser for distrbution data. | |
127 | * Format is: | |
128 | * # comment line(s) | |
129 | * data0 data1 ... | |
130 | */ | |
131 | static int get_distribution(const char *type, __s16 *data, int maxdata) | |
132 | { | |
133 | FILE *f; | |
134 | int n; | |
135 | long x; | |
136 | size_t len; | |
137 | char *line = NULL; | |
138 | char name[128]; | |
139 | ||
140 | snprintf(name, sizeof(name), "%s/%s.dist", get_tc_lib(), type); | |
141 | if ((f = fopen(name, "r")) == NULL) { | |
142 | fprintf(stderr, "No distribution data for %s (%s: %s)\n", | |
143 | type, name, strerror(errno)); | |
144 | return -1; | |
145 | } | |
146 | ||
147 | n = 0; | |
148 | while (getline(&line, &len, f) != -1) { | |
149 | char *p, *endp; | |
150 | ||
151 | if (*line == '\n' || *line == '#') | |
152 | continue; | |
153 | ||
154 | for (p = line; ; p = endp) { | |
155 | x = strtol(p, &endp, 0); | |
156 | if (endp == p) | |
157 | break; | |
158 | ||
159 | if (n >= maxdata) { | |
160 | fprintf(stderr, "%s: too much data\n", | |
161 | name); | |
162 | n = -1; | |
163 | goto error; | |
164 | } | |
165 | data[n++] = x; | |
166 | } | |
167 | } | |
168 | error: | |
169 | free(line); | |
170 | fclose(f); | |
171 | return n; | |
172 | } | |
173 | ||
174 | #define NEXT_IS_NUMBER() (NEXT_ARG_OK() && isdigit(argv[1][0])) | |
175 | #define NEXT_IS_SIGNED_NUMBER() \ | |
176 | (NEXT_ARG_OK() && (isdigit(argv[1][0]) || argv[1][0] == '-')) | |
177 | ||
178 | /* Adjust for the fact that psched_ticks aren't always usecs | |
179 | (based on kernel PSCHED_CLOCK configuration */ | |
180 | static int get_ticks(__u32 *ticks, const char *str) | |
181 | { | |
182 | unsigned int t; | |
183 | ||
184 | if (get_time(&t, str)) | |
185 | return -1; | |
186 | ||
187 | if (tc_core_time2big(t)) { | |
188 | fprintf(stderr, "Illegal %u time (too large)\n", t); | |
189 | return -1; | |
190 | } | |
191 | ||
192 | *ticks = tc_core_time2tick(t); | |
193 | return 0; | |
194 | } | |
195 | ||
196 | static int netem_parse_opt(struct qdisc_util *qu, int argc, char **argv, | |
197 | struct nlmsghdr *n, const char *dev) | |
198 | { | |
199 | int dist_size = 0; | |
200 | int slot_dist_size = 0; | |
201 | struct rtattr *tail; | |
202 | struct tc_netem_qopt opt = { .limit = 1000 }; | |
203 | struct tc_netem_corr cor = {}; | |
204 | struct tc_netem_reorder reorder = {}; | |
205 | struct tc_netem_corrupt corrupt = {}; | |
206 | struct tc_netem_gimodel gimodel; | |
207 | struct tc_netem_gemodel gemodel; | |
208 | struct tc_netem_rate rate = {}; | |
209 | struct tc_netem_slot slot = {}; | |
210 | __s16 *dist_data = NULL; | |
211 | __s16 *slot_dist_data = NULL; | |
212 | __u16 loss_type = NETEM_LOSS_UNSPEC; | |
213 | int present[__TCA_NETEM_MAX] = {}; | |
214 | __u64 rate64 = 0; | |
215 | ||
216 | for ( ; argc > 0; --argc, ++argv) { | |
217 | if (matches(*argv, "limit") == 0) { | |
218 | NEXT_ARG(); | |
219 | if (get_size(&opt.limit, *argv)) { | |
220 | explain1("limit"); | |
221 | return -1; | |
222 | } | |
223 | } else if (matches(*argv, "latency") == 0 || | |
224 | matches(*argv, "delay") == 0) { | |
225 | NEXT_ARG(); | |
226 | if (get_ticks(&opt.latency, *argv)) { | |
227 | explain1("latency"); | |
228 | return -1; | |
229 | } | |
230 | ||
231 | if (NEXT_IS_NUMBER()) { | |
232 | NEXT_ARG(); | |
233 | if (get_ticks(&opt.jitter, *argv)) { | |
234 | explain1("latency"); | |
235 | return -1; | |
236 | } | |
237 | ||
238 | if (NEXT_IS_NUMBER()) { | |
239 | NEXT_ARG(); | |
240 | ++present[TCA_NETEM_CORR]; | |
241 | if (get_percent(&cor.delay_corr, *argv)) { | |
242 | explain1("latency"); | |
243 | return -1; | |
244 | } | |
245 | } | |
246 | } | |
247 | } else if (matches(*argv, "loss") == 0 || | |
248 | matches(*argv, "drop") == 0) { | |
249 | if (opt.loss > 0 || loss_type != NETEM_LOSS_UNSPEC) { | |
250 | explain1("duplicate loss argument\n"); | |
251 | return -1; | |
252 | } | |
253 | ||
254 | NEXT_ARG(); | |
255 | /* Old (deprecated) random loss model syntax */ | |
256 | if (isdigit(argv[0][0])) | |
257 | goto random_loss_model; | |
258 | ||
259 | if (!strcmp(*argv, "random")) { | |
260 | NEXT_ARG(); | |
261 | random_loss_model: | |
262 | if (get_percent(&opt.loss, *argv)) { | |
263 | explain1("loss percent"); | |
264 | return -1; | |
265 | } | |
266 | if (NEXT_IS_NUMBER()) { | |
267 | NEXT_ARG(); | |
268 | ++present[TCA_NETEM_CORR]; | |
269 | if (get_percent(&cor.loss_corr, *argv)) { | |
270 | explain1("loss correllation"); | |
271 | return -1; | |
272 | } | |
273 | } | |
274 | } else if (!strcmp(*argv, "state")) { | |
275 | double p13; | |
276 | ||
277 | NEXT_ARG(); | |
278 | if (parse_percent(&p13, *argv)) { | |
279 | explain1("loss p13"); | |
280 | return -1; | |
281 | } | |
282 | ||
283 | /* set defaults */ | |
284 | set_percent(&gimodel.p13, p13); | |
285 | set_percent(&gimodel.p31, 1. - p13); | |
286 | set_percent(&gimodel.p32, 0); | |
287 | set_percent(&gimodel.p23, 1.); | |
288 | set_percent(&gimodel.p14, 0); | |
289 | loss_type = NETEM_LOSS_GI; | |
290 | ||
291 | if (!NEXT_IS_NUMBER()) | |
292 | continue; | |
293 | NEXT_ARG(); | |
294 | if (get_percent(&gimodel.p31, *argv)) { | |
295 | explain1("loss p31"); | |
296 | return -1; | |
297 | } | |
298 | ||
299 | if (!NEXT_IS_NUMBER()) | |
300 | continue; | |
301 | NEXT_ARG(); | |
302 | if (get_percent(&gimodel.p32, *argv)) { | |
303 | explain1("loss p32"); | |
304 | return -1; | |
305 | } | |
306 | ||
307 | if (!NEXT_IS_NUMBER()) | |
308 | continue; | |
309 | NEXT_ARG(); | |
310 | if (get_percent(&gimodel.p23, *argv)) { | |
311 | explain1("loss p23"); | |
312 | return -1; | |
313 | } | |
314 | if (!NEXT_IS_NUMBER()) | |
315 | continue; | |
316 | NEXT_ARG(); | |
317 | if (get_percent(&gimodel.p14, *argv)) { | |
318 | explain1("loss p14"); | |
319 | return -1; | |
320 | } | |
321 | ||
322 | } else if (!strcmp(*argv, "gemodel")) { | |
323 | double p; | |
324 | ||
325 | NEXT_ARG(); | |
326 | if (parse_percent(&p, *argv)) { | |
327 | explain1("loss gemodel p"); | |
328 | return -1; | |
329 | } | |
330 | set_percent(&gemodel.p, p); | |
331 | ||
332 | /* set defaults */ | |
333 | set_percent(&gemodel.r, 1. - p); | |
334 | set_percent(&gemodel.h, 0); | |
335 | set_percent(&gemodel.k1, 0); | |
336 | loss_type = NETEM_LOSS_GE; | |
337 | ||
338 | if (!NEXT_IS_NUMBER()) | |
339 | continue; | |
340 | NEXT_ARG(); | |
341 | if (get_percent(&gemodel.r, *argv)) { | |
342 | explain1("loss gemodel r"); | |
343 | return -1; | |
344 | } | |
345 | ||
346 | if (!NEXT_IS_NUMBER()) | |
347 | continue; | |
348 | NEXT_ARG(); | |
349 | if (get_percent(&gemodel.h, *argv)) { | |
350 | explain1("loss gemodel h"); | |
351 | return -1; | |
352 | } | |
353 | /* netem option is "1-h" but kernel | |
354 | * expects "h". | |
355 | */ | |
356 | gemodel.h = UINT32_MAX - gemodel.h; | |
357 | ||
358 | if (!NEXT_IS_NUMBER()) | |
359 | continue; | |
360 | NEXT_ARG(); | |
361 | if (get_percent(&gemodel.k1, *argv)) { | |
362 | explain1("loss gemodel k"); | |
363 | return -1; | |
364 | } | |
365 | } else { | |
366 | fprintf(stderr, "Unknown loss parameter: %s\n", | |
367 | *argv); | |
368 | return -1; | |
369 | } | |
370 | } else if (matches(*argv, "ecn") == 0) { | |
371 | present[TCA_NETEM_ECN] = 1; | |
372 | } else if (matches(*argv, "reorder") == 0) { | |
373 | NEXT_ARG(); | |
374 | present[TCA_NETEM_REORDER] = 1; | |
375 | if (get_percent(&reorder.probability, *argv)) { | |
376 | explain1("reorder"); | |
377 | return -1; | |
378 | } | |
379 | if (NEXT_IS_NUMBER()) { | |
380 | NEXT_ARG(); | |
381 | ++present[TCA_NETEM_CORR]; | |
382 | if (get_percent(&reorder.correlation, *argv)) { | |
383 | explain1("reorder"); | |
384 | return -1; | |
385 | } | |
386 | } | |
387 | } else if (matches(*argv, "corrupt") == 0) { | |
388 | NEXT_ARG(); | |
389 | present[TCA_NETEM_CORRUPT] = 1; | |
390 | if (get_percent(&corrupt.probability, *argv)) { | |
391 | explain1("corrupt"); | |
392 | return -1; | |
393 | } | |
394 | if (NEXT_IS_NUMBER()) { | |
395 | NEXT_ARG(); | |
396 | ++present[TCA_NETEM_CORR]; | |
397 | if (get_percent(&corrupt.correlation, *argv)) { | |
398 | explain1("corrupt"); | |
399 | return -1; | |
400 | } | |
401 | } | |
402 | } else if (matches(*argv, "gap") == 0) { | |
403 | NEXT_ARG(); | |
404 | if (get_u32(&opt.gap, *argv, 0)) { | |
405 | explain1("gap"); | |
406 | return -1; | |
407 | } | |
408 | } else if (matches(*argv, "duplicate") == 0) { | |
409 | NEXT_ARG(); | |
410 | if (get_percent(&opt.duplicate, *argv)) { | |
411 | explain1("duplicate"); | |
412 | return -1; | |
413 | } | |
414 | if (NEXT_IS_NUMBER()) { | |
415 | NEXT_ARG(); | |
416 | if (get_percent(&cor.dup_corr, *argv)) { | |
417 | explain1("duplicate"); | |
418 | return -1; | |
419 | } | |
420 | } | |
421 | } else if (matches(*argv, "distribution") == 0) { | |
422 | NEXT_ARG(); | |
423 | dist_data = calloc(sizeof(dist_data[0]), MAX_DIST); | |
424 | dist_size = get_distribution(*argv, dist_data, MAX_DIST); | |
425 | if (dist_size <= 0) { | |
426 | free(dist_data); | |
427 | return -1; | |
428 | } | |
429 | } else if (matches(*argv, "rate") == 0) { | |
430 | ++present[TCA_NETEM_RATE]; | |
431 | NEXT_ARG(); | |
432 | if (strchr(*argv, '%')) { | |
433 | if (get_percent_rate64(&rate64, *argv, dev)) { | |
434 | explain1("rate"); | |
435 | return -1; | |
436 | } | |
437 | } else if (get_rate64(&rate64, *argv)) { | |
438 | explain1("rate"); | |
439 | return -1; | |
440 | } | |
441 | if (NEXT_IS_SIGNED_NUMBER()) { | |
442 | NEXT_ARG(); | |
443 | if (get_s32(&rate.packet_overhead, *argv, 0)) { | |
444 | explain1("rate"); | |
445 | return -1; | |
446 | } | |
447 | } | |
448 | if (NEXT_IS_NUMBER()) { | |
449 | NEXT_ARG(); | |
450 | if (get_u32(&rate.cell_size, *argv, 0)) { | |
451 | explain1("rate"); | |
452 | return -1; | |
453 | } | |
454 | } | |
455 | if (NEXT_IS_SIGNED_NUMBER()) { | |
456 | NEXT_ARG(); | |
457 | if (get_s32(&rate.cell_overhead, *argv, 0)) { | |
458 | explain1("rate"); | |
459 | return -1; | |
460 | } | |
461 | } | |
462 | } else if (matches(*argv, "slot") == 0) { | |
463 | if (NEXT_IS_NUMBER()) { | |
464 | NEXT_ARG(); | |
465 | present[TCA_NETEM_SLOT] = 1; | |
466 | if (get_time64(&slot.min_delay, *argv)) { | |
467 | explain1("slot min_delay"); | |
468 | return -1; | |
469 | } | |
470 | if (NEXT_IS_NUMBER()) { | |
471 | NEXT_ARG(); | |
472 | if (get_time64(&slot.max_delay, *argv) || | |
473 | slot.max_delay < slot.min_delay) { | |
474 | explain1("slot max_delay"); | |
475 | return -1; | |
476 | } | |
477 | } else { | |
478 | slot.max_delay = slot.min_delay; | |
479 | } | |
480 | } else { | |
481 | NEXT_ARG(); | |
482 | if (strcmp(*argv, "distribution") == 0) { | |
483 | present[TCA_NETEM_SLOT] = 1; | |
484 | NEXT_ARG(); | |
485 | slot_dist_data = calloc(sizeof(slot_dist_data[0]), MAX_DIST); | |
486 | if (!slot_dist_data) | |
487 | return -1; | |
488 | slot_dist_size = get_distribution(*argv, slot_dist_data, MAX_DIST); | |
489 | if (slot_dist_size <= 0) { | |
490 | free(slot_dist_data); | |
491 | return -1; | |
492 | } | |
493 | NEXT_ARG(); | |
494 | if (get_time64(&slot.dist_delay, *argv)) { | |
495 | explain1("slot delay"); | |
496 | return -1; | |
497 | } | |
498 | NEXT_ARG(); | |
499 | if (get_time64(&slot.dist_jitter, *argv)) { | |
500 | explain1("slot jitter"); | |
501 | return -1; | |
502 | } | |
503 | if (slot.dist_jitter <= 0) { | |
504 | fprintf(stderr, "Non-positive jitter\n"); | |
505 | return -1; | |
506 | } | |
507 | } else { | |
508 | fprintf(stderr, "Unknown slot parameter: %s\n", | |
509 | *argv); | |
510 | return -1; | |
511 | } | |
512 | } | |
513 | if (NEXT_ARG_OK() && | |
514 | matches(*(argv+1), "packets") == 0) { | |
515 | NEXT_ARG(); | |
516 | if (!NEXT_ARG_OK() || | |
517 | get_s32(&slot.max_packets, *(argv+1), 0)) { | |
518 | explain1("slot packets"); | |
519 | return -1; | |
520 | } | |
521 | NEXT_ARG(); | |
522 | } | |
523 | if (NEXT_ARG_OK() && | |
524 | matches(*(argv+1), "bytes") == 0) { | |
525 | unsigned int max_bytes; | |
526 | NEXT_ARG(); | |
527 | if (!NEXT_ARG_OK() || | |
528 | get_size(&max_bytes, *(argv+1))) { | |
529 | explain1("slot bytes"); | |
530 | return -1; | |
531 | } | |
532 | slot.max_bytes = (int) max_bytes; | |
533 | NEXT_ARG(); | |
534 | } | |
535 | } else if (strcmp(*argv, "help") == 0) { | |
536 | explain(); | |
537 | return -1; | |
538 | } else { | |
539 | fprintf(stderr, "What is \"%s\"?\n", *argv); | |
540 | explain(); | |
541 | return -1; | |
542 | } | |
543 | } | |
544 | ||
545 | tail = NLMSG_TAIL(n); | |
546 | ||
547 | if (reorder.probability) { | |
548 | if (opt.latency == 0) { | |
549 | fprintf(stderr, "reordering not possible without specifying some delay\n"); | |
550 | explain(); | |
551 | return -1; | |
552 | } | |
553 | if (opt.gap == 0) | |
554 | opt.gap = 1; | |
555 | } else if (opt.gap > 0) { | |
556 | fprintf(stderr, "gap specified without reorder probability\n"); | |
557 | explain(); | |
558 | return -1; | |
559 | } | |
560 | ||
561 | if (present[TCA_NETEM_ECN]) { | |
562 | if (opt.loss <= 0 && loss_type == NETEM_LOSS_UNSPEC) { | |
563 | fprintf(stderr, "ecn requested without loss model\n"); | |
564 | explain(); | |
565 | return -1; | |
566 | } | |
567 | } | |
568 | ||
569 | if (dist_data && (opt.latency == 0 || opt.jitter == 0)) { | |
570 | fprintf(stderr, "distribution specified but no latency and jitter values\n"); | |
571 | explain(); | |
572 | return -1; | |
573 | } | |
574 | ||
575 | if (addattr_l(n, 1024, TCA_OPTIONS, &opt, sizeof(opt)) < 0) | |
576 | return -1; | |
577 | ||
578 | if (present[TCA_NETEM_CORR] && | |
579 | addattr_l(n, 1024, TCA_NETEM_CORR, &cor, sizeof(cor)) < 0) | |
580 | return -1; | |
581 | ||
582 | if (present[TCA_NETEM_REORDER] && | |
583 | addattr_l(n, 1024, TCA_NETEM_REORDER, &reorder, sizeof(reorder)) < 0) | |
584 | return -1; | |
585 | ||
586 | if (present[TCA_NETEM_ECN] && | |
587 | addattr_l(n, 1024, TCA_NETEM_ECN, &present[TCA_NETEM_ECN], | |
588 | sizeof(present[TCA_NETEM_ECN])) < 0) | |
589 | return -1; | |
590 | ||
591 | if (present[TCA_NETEM_CORRUPT] && | |
592 | addattr_l(n, 1024, TCA_NETEM_CORRUPT, &corrupt, sizeof(corrupt)) < 0) | |
593 | return -1; | |
594 | ||
595 | if (present[TCA_NETEM_SLOT] && | |
596 | addattr_l(n, 1024, TCA_NETEM_SLOT, &slot, sizeof(slot)) < 0) | |
597 | return -1; | |
598 | ||
599 | if (loss_type != NETEM_LOSS_UNSPEC) { | |
600 | struct rtattr *start; | |
601 | ||
602 | start = addattr_nest(n, 1024, TCA_NETEM_LOSS | NLA_F_NESTED); | |
603 | if (loss_type == NETEM_LOSS_GI) { | |
604 | if (addattr_l(n, 1024, NETEM_LOSS_GI, | |
605 | &gimodel, sizeof(gimodel)) < 0) | |
606 | return -1; | |
607 | } else if (loss_type == NETEM_LOSS_GE) { | |
608 | if (addattr_l(n, 1024, NETEM_LOSS_GE, | |
609 | &gemodel, sizeof(gemodel)) < 0) | |
610 | return -1; | |
611 | } else { | |
612 | fprintf(stderr, "loss in the weeds!\n"); | |
613 | return -1; | |
614 | } | |
615 | ||
616 | addattr_nest_end(n, start); | |
617 | } | |
618 | ||
619 | if (present[TCA_NETEM_RATE]) { | |
620 | if (rate64 >= (1ULL << 32)) { | |
621 | if (addattr_l(n, 1024, | |
622 | TCA_NETEM_RATE64, &rate64, sizeof(rate64)) < 0) | |
623 | return -1; | |
624 | rate.rate = ~0U; | |
625 | } else { | |
626 | rate.rate = rate64; | |
627 | } | |
628 | if (addattr_l(n, 1024, TCA_NETEM_RATE, &rate, sizeof(rate)) < 0) | |
629 | return -1; | |
630 | } | |
631 | ||
632 | if (dist_data) { | |
633 | if (addattr_l(n, MAX_DIST * sizeof(dist_data[0]), | |
634 | TCA_NETEM_DELAY_DIST, | |
635 | dist_data, dist_size * sizeof(dist_data[0])) < 0) | |
636 | return -1; | |
637 | free(dist_data); | |
638 | } | |
639 | ||
640 | if (slot_dist_data) { | |
641 | if (addattr_l(n, MAX_DIST * sizeof(slot_dist_data[0]), | |
642 | TCA_NETEM_SLOT_DIST, | |
643 | slot_dist_data, slot_dist_size * sizeof(slot_dist_data[0])) < 0) | |
644 | return -1; | |
645 | free(slot_dist_data); | |
646 | } | |
647 | tail->rta_len = (void *) NLMSG_TAIL(n) - (void *) tail; | |
648 | return 0; | |
649 | } | |
650 | ||
651 | static int netem_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt) | |
652 | { | |
653 | const struct tc_netem_corr *cor = NULL; | |
654 | const struct tc_netem_reorder *reorder = NULL; | |
655 | const struct tc_netem_corrupt *corrupt = NULL; | |
656 | const struct tc_netem_gimodel *gimodel = NULL; | |
657 | const struct tc_netem_gemodel *gemodel = NULL; | |
658 | int *ecn = NULL; | |
659 | struct tc_netem_qopt qopt; | |
660 | const struct tc_netem_rate *rate = NULL; | |
661 | const struct tc_netem_slot *slot = NULL; | |
662 | int len; | |
663 | __u64 rate64 = 0; | |
664 | ||
665 | SPRINT_BUF(b1); | |
666 | ||
667 | if (opt == NULL) | |
668 | return 0; | |
669 | ||
670 | len = RTA_PAYLOAD(opt) - sizeof(qopt); | |
671 | if (len < 0) { | |
672 | fprintf(stderr, "options size error\n"); | |
673 | return -1; | |
674 | } | |
675 | memcpy(&qopt, RTA_DATA(opt), sizeof(qopt)); | |
676 | ||
677 | if (len > 0) { | |
678 | struct rtattr *tb[TCA_NETEM_MAX+1]; | |
679 | ||
680 | parse_rtattr(tb, TCA_NETEM_MAX, RTA_DATA(opt) + sizeof(qopt), | |
681 | len); | |
682 | ||
683 | if (tb[TCA_NETEM_CORR]) { | |
684 | if (RTA_PAYLOAD(tb[TCA_NETEM_CORR]) < sizeof(*cor)) | |
685 | return -1; | |
686 | cor = RTA_DATA(tb[TCA_NETEM_CORR]); | |
687 | } | |
688 | if (tb[TCA_NETEM_REORDER]) { | |
689 | if (RTA_PAYLOAD(tb[TCA_NETEM_REORDER]) < sizeof(*reorder)) | |
690 | return -1; | |
691 | reorder = RTA_DATA(tb[TCA_NETEM_REORDER]); | |
692 | } | |
693 | if (tb[TCA_NETEM_CORRUPT]) { | |
694 | if (RTA_PAYLOAD(tb[TCA_NETEM_CORRUPT]) < sizeof(*corrupt)) | |
695 | return -1; | |
696 | corrupt = RTA_DATA(tb[TCA_NETEM_CORRUPT]); | |
697 | } | |
698 | if (tb[TCA_NETEM_LOSS]) { | |
699 | struct rtattr *lb[NETEM_LOSS_MAX + 1]; | |
700 | ||
701 | parse_rtattr_nested(lb, NETEM_LOSS_MAX, tb[TCA_NETEM_LOSS]); | |
702 | if (lb[NETEM_LOSS_GI]) | |
703 | gimodel = RTA_DATA(lb[NETEM_LOSS_GI]); | |
704 | if (lb[NETEM_LOSS_GE]) | |
705 | gemodel = RTA_DATA(lb[NETEM_LOSS_GE]); | |
706 | } | |
707 | if (tb[TCA_NETEM_RATE]) { | |
708 | if (RTA_PAYLOAD(tb[TCA_NETEM_RATE]) < sizeof(*rate)) | |
709 | return -1; | |
710 | rate = RTA_DATA(tb[TCA_NETEM_RATE]); | |
711 | } | |
712 | if (tb[TCA_NETEM_ECN]) { | |
713 | if (RTA_PAYLOAD(tb[TCA_NETEM_ECN]) < sizeof(*ecn)) | |
714 | return -1; | |
715 | ecn = RTA_DATA(tb[TCA_NETEM_ECN]); | |
716 | } | |
717 | if (tb[TCA_NETEM_RATE64]) { | |
718 | if (RTA_PAYLOAD(tb[TCA_NETEM_RATE64]) < sizeof(rate64)) | |
719 | return -1; | |
720 | rate64 = rta_getattr_u64(tb[TCA_NETEM_RATE64]); | |
721 | } | |
722 | if (tb[TCA_NETEM_SLOT]) { | |
723 | if (RTA_PAYLOAD(tb[TCA_NETEM_SLOT]) < sizeof(*slot)) | |
724 | return -1; | |
725 | slot = RTA_DATA(tb[TCA_NETEM_SLOT]); | |
726 | } | |
727 | } | |
728 | ||
729 | print_uint(PRINT_ANY, "limit", "limit %d", qopt.limit); | |
730 | ||
731 | if (qopt.latency) { | |
732 | open_json_object("delay"); | |
733 | if (!is_json_context()) { | |
734 | print_string(PRINT_FP, NULL, " delay %s", | |
735 | sprint_ticks(qopt.latency, b1)); | |
736 | ||
737 | if (qopt.jitter) | |
738 | print_string(PRINT_FP, NULL, " %s", | |
739 | sprint_ticks(qopt.jitter, b1)); | |
740 | } else { | |
741 | print_float(PRINT_JSON, "delay", NULL, | |
742 | tc_core_tick2time(qopt.latency) / | |
743 | 1000000.); | |
744 | print_float(PRINT_JSON, "jitter", NULL, | |
745 | tc_core_tick2time(qopt.jitter) / | |
746 | 1000000.); | |
747 | } | |
748 | print_corr(qopt.jitter && cor && cor->delay_corr, | |
749 | cor ? cor->delay_corr : 0); | |
750 | close_json_object(); | |
751 | } | |
752 | ||
753 | if (qopt.loss) { | |
754 | open_json_object("loss-random"); | |
755 | PRINT_PERCENT("loss", qopt.loss); | |
756 | print_corr(cor && cor->loss_corr, cor ? cor->loss_corr : 0); | |
757 | close_json_object(); | |
758 | } | |
759 | ||
760 | if (gimodel) { | |
761 | open_json_object("loss-state"); | |
762 | __PRINT_PERCENT("p13", " loss state p13", gimodel->p13); | |
763 | PRINT_PERCENT("p31", gimodel->p31); | |
764 | PRINT_PERCENT("p32", gimodel->p32); | |
765 | PRINT_PERCENT("p23", gimodel->p23); | |
766 | PRINT_PERCENT("p14", gimodel->p14); | |
767 | close_json_object(); | |
768 | } | |
769 | ||
770 | if (gemodel) { | |
771 | open_json_object("loss-gemodel"); | |
772 | __PRINT_PERCENT("p", " loss gemodel p", gemodel->p); | |
773 | PRINT_PERCENT("r", gemodel->r); | |
774 | PRINT_PERCENT("1-h", UINT32_MAX - gemodel->h); | |
775 | PRINT_PERCENT("1-k", gemodel->k1); | |
776 | close_json_object(); | |
777 | } | |
778 | ||
779 | if (qopt.duplicate) { | |
780 | open_json_object("duplicate"); | |
781 | PRINT_PERCENT("duplicate", qopt.duplicate); | |
782 | print_corr(cor && cor->dup_corr, cor ? cor->dup_corr : 0); | |
783 | close_json_object(); | |
784 | } | |
785 | ||
786 | if (reorder && reorder->probability) { | |
787 | open_json_object("reorder"); | |
788 | PRINT_PERCENT("reorder", reorder->probability); | |
789 | print_corr(reorder->correlation, reorder->correlation); | |
790 | close_json_object(); | |
791 | } | |
792 | ||
793 | if (corrupt && corrupt->probability) { | |
794 | open_json_object("corrupt"); | |
795 | PRINT_PERCENT("corrupt", corrupt->probability); | |
796 | print_corr(corrupt->correlation, corrupt->correlation); | |
797 | close_json_object(); | |
798 | } | |
799 | ||
800 | if (rate && rate->rate) { | |
801 | open_json_object("rate"); | |
802 | rate64 = rate64 ? : rate->rate; | |
803 | print_string(PRINT_FP, NULL, " rate %s", | |
804 | sprint_rate(rate64, b1)); | |
805 | print_lluint(PRINT_JSON, "rate", NULL, rate64); | |
806 | PRINT_INT_OPT("packetoverhead", rate->packet_overhead); | |
807 | print_uint(PRINT_ANY, "cellsize", | |
808 | rate->cell_size ? " cellsize %u" : "", | |
809 | rate->cell_size); | |
810 | PRINT_INT_OPT("celloverhead", rate->cell_overhead); | |
811 | close_json_object(); | |
812 | } | |
813 | ||
814 | if (slot) { | |
815 | open_json_object("slot"); | |
816 | if (slot->dist_jitter > 0) { | |
817 | __PRINT_TIME64("distribution", " slot distribution", | |
818 | slot->dist_delay); | |
819 | __PRINT_TIME64("jitter", "", slot->dist_jitter); | |
820 | } else { | |
821 | __PRINT_TIME64("min-delay", " slot", slot->min_delay); | |
822 | __PRINT_TIME64("max-delay", "", slot->max_delay); | |
823 | } | |
824 | PRINT_INT_OPT("packets", slot->max_packets); | |
825 | PRINT_INT_OPT("bytes", slot->max_bytes); | |
826 | close_json_object(); | |
827 | } | |
828 | ||
829 | print_bool(PRINT_ANY, "ecn", ecn ? " ecn " : "", ecn); | |
830 | print_luint(PRINT_ANY, "gap", qopt.gap ? " gap %lu" : "", | |
831 | (unsigned long)qopt.gap); | |
832 | ||
833 | return 0; | |
834 | } | |
835 | ||
836 | struct qdisc_util netem_qdisc_util = { | |
837 | .id = "netem", | |
838 | .parse_qopt = netem_parse_opt, | |
839 | .print_qopt = netem_print_opt, | |
840 | }; |