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Commit | Line | Data |
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309a4c90 SH |
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 | * | |
59a935d2 | 9 | * Authors: Stephen Hemminger <shemminger@linux-foundation.org> |
309a4c90 SH |
10 | * |
11 | */ | |
12 | ||
13 | #include <stdio.h> | |
14 | #include <stdlib.h> | |
3c7950af SH |
15 | #include <math.h> |
16 | #include <ctype.h> | |
309a4c90 | 17 | #include <unistd.h> |
309a4c90 | 18 | #include <fcntl.h> |
e4beb527 | 19 | #include <stdint.h> |
309a4c90 SH |
20 | #include <sys/socket.h> |
21 | #include <netinet/in.h> | |
22 | #include <arpa/inet.h> | |
23 | #include <string.h> | |
b7be3d0c | 24 | #include <errno.h> |
309a4c90 SH |
25 | |
26 | #include "utils.h" | |
27 | #include "tc_util.h" | |
b7be3d0c | 28 | #include "tc_common.h" |
309a4c90 SH |
29 | |
30 | static void explain(void) | |
31 | { | |
ae665a52 | 32 | fprintf(stderr, |
32a121cb | 33 | "Usage: ... netem [ limit PACKETS ]\n" \ |
ea8fc104 SH |
34 | " [ delay TIME [ JITTER [CORRELATION]]]\n" \ |
35 | " [ distribution {uniform|normal|pareto|paretonormal} ]\n" \ | |
32a121cb | 36 | " [ corrupt PERCENT [CORRELATION]]\n" \ |
b7be3d0c | 37 | " [ duplicate PERCENT [CORRELATION]]\n" \ |
3c7950af SH |
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" \ | |
1070205d | 41 | " [ ecn ]\n" \ |
6b8dc4de HPP |
42 | " [ reorder PRECENT [CORRELATION] [ gap DISTANCE ]]\n" \ |
43 | " [ rate RATE [PACKETOVERHEAD] [CELLSIZE] [CELLOVERHEAD]]\n"); | |
309a4c90 SH |
44 | } |
45 | ||
46 | static void explain1(const char *arg) | |
47 | { | |
48 | fprintf(stderr, "Illegal \"%s\"\n", arg); | |
49 | } | |
50 | ||
3c7950af | 51 | /* Upper bound on size of distribution |
c1b81cb5 SH |
52 | * really (TCA_BUF_MAX - other headers) / sizeof (__s16) |
53 | */ | |
54 | #define MAX_DIST (16*1024) | |
55 | ||
3c7950af SH |
56 | /* scaled value used to percent of maximum. */ |
57 | static void set_percent(__u32 *percent, double per) | |
58 | { | |
e4beb527 | 59 | *percent = rint(per * UINT32_MAX); |
3c7950af SH |
60 | } |
61 | ||
3c7950af SH |
62 | static int get_percent(__u32 *percent, const char *str) |
63 | { | |
64 | double per; | |
65 | ||
66 | if (parse_percent(&per, str)) | |
67 | return -1; | |
68 | ||
69 | set_percent(percent, per); | |
70 | return 0; | |
71 | } | |
72 | ||
d1f28cf1 | 73 | static void print_percent(char *buf, int len, __u32 per) |
3c7950af | 74 | { |
e4beb527 | 75 | snprintf(buf, len, "%g%%", (100. * per) / UINT32_MAX); |
3c7950af SH |
76 | } |
77 | ||
32a121cb | 78 | static char *sprint_percent(__u32 per, char *buf) |
3c7950af SH |
79 | { |
80 | print_percent(buf, SPRINT_BSIZE-1, per); | |
81 | return buf; | |
82 | } | |
83 | ||
2e21655e SH |
84 | /* |
85 | * Simplistic file parser for distrbution data. | |
86 | * Format is: | |
87 | * # comment line(s) | |
c1b81cb5 | 88 | * data0 data1 ... |
2e21655e | 89 | */ |
c1b81cb5 | 90 | static int get_distribution(const char *type, __s16 *data, int maxdata) |
b7be3d0c SH |
91 | { |
92 | FILE *f; | |
93 | int n; | |
2e21655e SH |
94 | long x; |
95 | size_t len; | |
fb9b1d0f | 96 | char *line = NULL; |
2e21655e | 97 | char name[128]; |
b7be3d0c | 98 | |
aa27f88c | 99 | snprintf(name, sizeof(name), "%s/%s.dist", get_tc_lib(), type); |
2e21655e | 100 | if ((f = fopen(name, "r")) == NULL) { |
ae665a52 | 101 | fprintf(stderr, "No distribution data for %s (%s: %s)\n", |
2e21655e | 102 | type, name, strerror(errno)); |
b7be3d0c SH |
103 | return -1; |
104 | } | |
ae665a52 | 105 | |
b7be3d0c | 106 | n = 0; |
2e21655e SH |
107 | while (getline(&line, &len, f) != -1) { |
108 | char *p, *endp; | |
32a121cb | 109 | |
2e21655e | 110 | if (*line == '\n' || *line == '#') |
b7be3d0c SH |
111 | continue; |
112 | ||
2e21655e SH |
113 | for (p = line; ; p = endp) { |
114 | x = strtol(p, &endp, 0); | |
ae665a52 | 115 | if (endp == p) |
2e21655e SH |
116 | break; |
117 | ||
c1b81cb5 | 118 | if (n >= maxdata) { |
2e21655e SH |
119 | fprintf(stderr, "%s: too much data\n", |
120 | name); | |
121 | n = -1; | |
122 | goto error; | |
123 | } | |
b7be3d0c SH |
124 | data[n++] = x; |
125 | } | |
126 | } | |
2e21655e SH |
127 | error: |
128 | free(line); | |
b7be3d0c | 129 | fclose(f); |
b7be3d0c SH |
130 | return n; |
131 | } | |
132 | ||
3c7950af | 133 | #define NEXT_IS_NUMBER() (NEXT_ARG_OK() && isdigit(argv[1][0])) |
e72ca3fb JN |
134 | #define NEXT_IS_SIGNED_NUMBER() \ |
135 | (NEXT_ARG_OK() && (isdigit(argv[1][0]) || argv[1][0] == '-')) | |
b7be3d0c | 136 | |
ae665a52 | 137 | /* Adjust for the fact that psched_ticks aren't always usecs |
b7be3d0c SH |
138 | (based on kernel PSCHED_CLOCK configuration */ |
139 | static int get_ticks(__u32 *ticks, const char *str) | |
140 | { | |
32a121cb | 141 | unsigned int t; |
b7be3d0c | 142 | |
32a121cb | 143 | if (get_time(&t, str)) |
b7be3d0c | 144 | return -1; |
ae665a52 | 145 | |
8f34caaf PM |
146 | if (tc_core_time2big(t)) { |
147 | fprintf(stderr, "Illegal %u time (too large)\n", t); | |
fa565130 SH |
148 | return -1; |
149 | } | |
150 | ||
8f34caaf | 151 | *ticks = tc_core_time2tick(t); |
b7be3d0c SH |
152 | return 0; |
153 | } | |
154 | ||
ae665a52 | 155 | static int netem_parse_opt(struct qdisc_util *qu, int argc, char **argv, |
927e3cfb | 156 | struct nlmsghdr *n, const char *dev) |
309a4c90 | 157 | { |
fcbd0165 | 158 | int dist_size = 0; |
2e21655e | 159 | struct rtattr *tail; |
3c7950af | 160 | struct tc_netem_qopt opt = { .limit = 1000 }; |
d17b136f PS |
161 | struct tc_netem_corr cor = {}; |
162 | struct tc_netem_reorder reorder = {}; | |
163 | struct tc_netem_corrupt corrupt = {}; | |
3c7950af SH |
164 | struct tc_netem_gimodel gimodel; |
165 | struct tc_netem_gemodel gemodel; | |
d17b136f | 166 | struct tc_netem_rate rate = {}; |
a31a5d59 | 167 | __s16 *dist_data = NULL; |
3c7950af | 168 | __u16 loss_type = NETEM_LOSS_UNSPEC; |
d17b136f | 169 | int present[__TCA_NETEM_MAX] = {}; |
dad2f72b | 170 | __u64 rate64 = 0; |
309a4c90 | 171 | |
32a121cb | 172 | for ( ; argc > 0; --argc, ++argv) { |
309a4c90 SH |
173 | if (matches(*argv, "limit") == 0) { |
174 | NEXT_ARG(); | |
2e21655e | 175 | if (get_size(&opt.limit, *argv)) { |
309a4c90 SH |
176 | explain1("limit"); |
177 | return -1; | |
178 | } | |
b7be3d0c SH |
179 | } else if (matches(*argv, "latency") == 0 || |
180 | matches(*argv, "delay") == 0) { | |
309a4c90 | 181 | NEXT_ARG(); |
2e21655e | 182 | if (get_ticks(&opt.latency, *argv)) { |
309a4c90 SH |
183 | explain1("latency"); |
184 | return -1; | |
185 | } | |
b7be3d0c SH |
186 | |
187 | if (NEXT_IS_NUMBER()) { | |
188 | NEXT_ARG(); | |
2e21655e | 189 | if (get_ticks(&opt.jitter, *argv)) { |
b7be3d0c SH |
190 | explain1("latency"); |
191 | return -1; | |
192 | } | |
193 | ||
194 | if (NEXT_IS_NUMBER()) { | |
195 | NEXT_ARG(); | |
40076f62 | 196 | ++present[TCA_NETEM_CORR]; |
3c7950af | 197 | if (get_percent(&cor.delay_corr, *argv)) { |
b7be3d0c SH |
198 | explain1("latency"); |
199 | return -1; | |
200 | } | |
201 | } | |
202 | } | |
203 | } else if (matches(*argv, "loss") == 0 || | |
204 | matches(*argv, "drop") == 0) { | |
3c7950af SH |
205 | if (opt.loss > 0 || loss_type != NETEM_LOSS_UNSPEC) { |
206 | explain1("duplicate loss argument\n"); | |
309a4c90 SH |
207 | return -1; |
208 | } | |
3c7950af SH |
209 | |
210 | NEXT_ARG(); | |
211 | /* Old (deprecated) random loss model syntax */ | |
212 | if (isdigit(argv[0][0])) | |
213 | goto random_loss_model; | |
214 | ||
215 | if (!strcmp(*argv, "random")) { | |
b7be3d0c | 216 | NEXT_ARG(); |
268a9eee | 217 | random_loss_model: |
3c7950af SH |
218 | if (get_percent(&opt.loss, *argv)) { |
219 | explain1("loss percent"); | |
220 | return -1; | |
221 | } | |
222 | if (NEXT_IS_NUMBER()) { | |
223 | NEXT_ARG(); | |
224 | ++present[TCA_NETEM_CORR]; | |
225 | if (get_percent(&cor.loss_corr, *argv)) { | |
226 | explain1("loss correllation"); | |
227 | return -1; | |
228 | } | |
229 | } | |
230 | } else if (!strcmp(*argv, "state")) { | |
231 | double p13; | |
232 | ||
233 | NEXT_ARG(); | |
234 | if (parse_percent(&p13, *argv)) { | |
235 | explain1("loss p13"); | |
236 | return -1; | |
237 | } | |
238 | ||
239 | /* set defaults */ | |
240 | set_percent(&gimodel.p13, p13); | |
241 | set_percent(&gimodel.p31, 1. - p13); | |
242 | set_percent(&gimodel.p32, 0); | |
243 | set_percent(&gimodel.p23, 1.); | |
8f9672af | 244 | set_percent(&gimodel.p14, 0); |
3c7950af SH |
245 | loss_type = NETEM_LOSS_GI; |
246 | ||
247 | if (!NEXT_IS_NUMBER()) | |
248 | continue; | |
249 | NEXT_ARG(); | |
250 | if (get_percent(&gimodel.p31, *argv)) { | |
251 | explain1("loss p31"); | |
252 | return -1; | |
253 | } | |
254 | ||
255 | if (!NEXT_IS_NUMBER()) | |
256 | continue; | |
257 | NEXT_ARG(); | |
258 | if (get_percent(&gimodel.p32, *argv)) { | |
259 | explain1("loss p32"); | |
260 | return -1; | |
261 | } | |
262 | ||
263 | if (!NEXT_IS_NUMBER()) | |
264 | continue; | |
265 | NEXT_ARG(); | |
266 | if (get_percent(&gimodel.p23, *argv)) { | |
267 | explain1("loss p23"); | |
268 | return -1; | |
269 | } | |
8f9672af JV |
270 | if (!NEXT_IS_NUMBER()) |
271 | continue; | |
272 | NEXT_ARG(); | |
273 | if (get_percent(&gimodel.p14, *argv)) { | |
274 | explain1("loss p14"); | |
275 | return -1; | |
276 | } | |
3c7950af SH |
277 | |
278 | } else if (!strcmp(*argv, "gemodel")) { | |
279 | NEXT_ARG(); | |
280 | if (get_percent(&gemodel.p, *argv)) { | |
281 | explain1("loss gemodel p"); | |
282 | return -1; | |
283 | } | |
284 | ||
285 | /* set defaults */ | |
286 | set_percent(&gemodel.r, 1.); | |
287 | set_percent(&gemodel.h, 0); | |
3757185b | 288 | set_percent(&gemodel.k1, 0); |
3c7950af SH |
289 | loss_type = NETEM_LOSS_GE; |
290 | ||
291 | if (!NEXT_IS_NUMBER()) | |
292 | continue; | |
293 | NEXT_ARG(); | |
294 | if (get_percent(&gemodel.r, *argv)) { | |
295 | explain1("loss gemodel r"); | |
296 | return -1; | |
297 | } | |
298 | ||
299 | if (!NEXT_IS_NUMBER()) | |
300 | continue; | |
301 | NEXT_ARG(); | |
302 | if (get_percent(&gemodel.h, *argv)) { | |
303 | explain1("loss gemodel h"); | |
304 | return -1; | |
305 | } | |
3757185b JV |
306 | /* netem option is "1-h" but kernel |
307 | * expects "h". | |
308 | */ | |
e4beb527 | 309 | gemodel.h = UINT32_MAX - gemodel.h; |
3c7950af SH |
310 | |
311 | if (!NEXT_IS_NUMBER()) | |
312 | continue; | |
313 | NEXT_ARG(); | |
314 | if (get_percent(&gemodel.k1, *argv)) { | |
315 | explain1("loss gemodel k"); | |
b7be3d0c SH |
316 | return -1; |
317 | } | |
3c7950af SH |
318 | } else { |
319 | fprintf(stderr, "Unknown loss parameter: %s\n", | |
320 | *argv); | |
321 | return -1; | |
b7be3d0c | 322 | } |
1070205d | 323 | } else if (matches(*argv, "ecn") == 0) { |
268a9eee | 324 | present[TCA_NETEM_ECN] = 1; |
ea8fc104 SH |
325 | } else if (matches(*argv, "reorder") == 0) { |
326 | NEXT_ARG(); | |
40076f62 | 327 | present[TCA_NETEM_REORDER] = 1; |
ea8fc104 SH |
328 | if (get_percent(&reorder.probability, *argv)) { |
329 | explain1("reorder"); | |
330 | return -1; | |
331 | } | |
332 | if (NEXT_IS_NUMBER()) { | |
333 | NEXT_ARG(); | |
40076f62 | 334 | ++present[TCA_NETEM_CORR]; |
ea8fc104 SH |
335 | if (get_percent(&reorder.correlation, *argv)) { |
336 | explain1("reorder"); | |
337 | return -1; | |
338 | } | |
339 | } | |
a31a5d59 SH |
340 | } else if (matches(*argv, "corrupt") == 0) { |
341 | NEXT_ARG(); | |
40076f62 | 342 | present[TCA_NETEM_CORRUPT] = 1; |
a31a5d59 SH |
343 | if (get_percent(&corrupt.probability, *argv)) { |
344 | explain1("corrupt"); | |
345 | return -1; | |
346 | } | |
347 | if (NEXT_IS_NUMBER()) { | |
348 | NEXT_ARG(); | |
40076f62 | 349 | ++present[TCA_NETEM_CORR]; |
a31a5d59 SH |
350 | if (get_percent(&corrupt.correlation, *argv)) { |
351 | explain1("corrupt"); | |
352 | return -1; | |
353 | } | |
354 | } | |
309a4c90 | 355 | } else if (matches(*argv, "gap") == 0) { |
309a4c90 | 356 | NEXT_ARG(); |
2e21655e | 357 | if (get_u32(&opt.gap, *argv, 0)) { |
309a4c90 SH |
358 | explain1("gap"); |
359 | return -1; | |
360 | } | |
ffb79d06 | 361 | } else if (matches(*argv, "duplicate") == 0) { |
309a4c90 | 362 | NEXT_ARG(); |
2e21655e | 363 | if (get_percent(&opt.duplicate, *argv)) { |
ffb79d06 | 364 | explain1("duplicate"); |
309a4c90 SH |
365 | return -1; |
366 | } | |
b7be3d0c SH |
367 | if (NEXT_IS_NUMBER()) { |
368 | NEXT_ARG(); | |
2e21655e | 369 | if (get_percent(&cor.dup_corr, *argv)) { |
b7be3d0c SH |
370 | explain1("duplicate"); |
371 | return -1; | |
372 | } | |
373 | } | |
374 | } else if (matches(*argv, "distribution") == 0) { | |
309a4c90 | 375 | NEXT_ARG(); |
c1b81cb5 SH |
376 | dist_data = calloc(sizeof(dist_data[0]), MAX_DIST); |
377 | dist_size = get_distribution(*argv, dist_data, MAX_DIST); | |
378 | if (dist_size <= 0) { | |
379 | free(dist_data); | |
309a4c90 | 380 | return -1; |
c1b81cb5 | 381 | } |
6b8dc4de HPP |
382 | } else if (matches(*argv, "rate") == 0) { |
383 | ++present[TCA_NETEM_RATE]; | |
384 | NEXT_ARG(); | |
927e3cfb ND |
385 | if (strchr(*argv, '%')) { |
386 | if (get_percent_rate64(&rate64, *argv, dev)) { | |
387 | explain1("rate"); | |
388 | return -1; | |
389 | } | |
390 | } else if (get_rate64(&rate64, *argv)) { | |
6b8dc4de HPP |
391 | explain1("rate"); |
392 | return -1; | |
393 | } | |
e72ca3fb | 394 | if (NEXT_IS_SIGNED_NUMBER()) { |
6b8dc4de HPP |
395 | NEXT_ARG(); |
396 | if (get_s32(&rate.packet_overhead, *argv, 0)) { | |
397 | explain1("rate"); | |
398 | return -1; | |
399 | } | |
400 | } | |
401 | if (NEXT_IS_NUMBER()) { | |
402 | NEXT_ARG(); | |
403 | if (get_u32(&rate.cell_size, *argv, 0)) { | |
404 | explain1("rate"); | |
405 | return -1; | |
406 | } | |
407 | } | |
e72ca3fb | 408 | if (NEXT_IS_SIGNED_NUMBER()) { |
6b8dc4de HPP |
409 | NEXT_ARG(); |
410 | if (get_s32(&rate.cell_overhead, *argv, 0)) { | |
411 | explain1("rate"); | |
412 | return -1; | |
413 | } | |
414 | } | |
309a4c90 SH |
415 | } else if (strcmp(*argv, "help") == 0) { |
416 | explain(); | |
417 | return -1; | |
418 | } else { | |
419 | fprintf(stderr, "What is \"%s\"?\n", *argv); | |
420 | explain(); | |
421 | return -1; | |
422 | } | |
309a4c90 SH |
423 | } |
424 | ||
1a1d22a7 | 425 | tail = NLMSG_TAIL(n); |
025dc69a | 426 | |
ea8fc104 SH |
427 | if (reorder.probability) { |
428 | if (opt.latency == 0) { | |
429 | fprintf(stderr, "reordering not possible without specifying some delay\n"); | |
14a1c164 VS |
430 | explain(); |
431 | return -1; | |
ea8fc104 SH |
432 | } |
433 | if (opt.gap == 0) | |
434 | opt.gap = 1; | |
435 | } else if (opt.gap > 0) { | |
436 | fprintf(stderr, "gap specified without reorder probability\n"); | |
437 | explain(); | |
438 | return -1; | |
439 | } | |
440 | ||
1070205d VS |
441 | if (present[TCA_NETEM_ECN]) { |
442 | if (opt.loss <= 0 && loss_type == NETEM_LOSS_UNSPEC) { | |
443 | fprintf(stderr, "ecn requested without loss model\n"); | |
444 | explain(); | |
445 | return -1; | |
446 | } | |
447 | } | |
448 | ||
a31a5d59 | 449 | if (dist_data && (opt.latency == 0 || opt.jitter == 0)) { |
ea8fc104 SH |
450 | fprintf(stderr, "distribution specified but no latency and jitter values\n"); |
451 | explain(); | |
452 | return -1; | |
453 | } | |
454 | ||
c1b81cb5 | 455 | if (addattr_l(n, 1024, TCA_OPTIONS, &opt, sizeof(opt)) < 0) |
a31a5d59 | 456 | return -1; |
2e21655e | 457 | |
40076f62 | 458 | if (present[TCA_NETEM_CORR] && |
c1b81cb5 | 459 | addattr_l(n, 1024, TCA_NETEM_CORR, &cor, sizeof(cor)) < 0) |
268a9eee | 460 | return -1; |
a31a5d59 | 461 | |
3c7950af | 462 | if (present[TCA_NETEM_REORDER] && |
c1b81cb5 | 463 | addattr_l(n, 1024, TCA_NETEM_REORDER, &reorder, sizeof(reorder)) < 0) |
e9bc3c40 | 464 | return -1; |
a31a5d59 | 465 | |
1070205d VS |
466 | if (present[TCA_NETEM_ECN] && |
467 | addattr_l(n, 1024, TCA_NETEM_ECN, &present[TCA_NETEM_ECN], | |
468 | sizeof(present[TCA_NETEM_ECN])) < 0) | |
268a9eee | 469 | return -1; |
1070205d | 470 | |
40076f62 | 471 | if (present[TCA_NETEM_CORRUPT] && |
c1b81cb5 | 472 | addattr_l(n, 1024, TCA_NETEM_CORRUPT, &corrupt, sizeof(corrupt)) < 0) |
40076f62 | 473 | return -1; |
a31a5d59 | 474 | |
3c7950af SH |
475 | if (loss_type != NETEM_LOSS_UNSPEC) { |
476 | struct rtattr *start; | |
477 | ||
478 | start = addattr_nest(n, 1024, TCA_NETEM_LOSS | NLA_F_NESTED); | |
479 | if (loss_type == NETEM_LOSS_GI) { | |
480 | if (addattr_l(n, 1024, NETEM_LOSS_GI, | |
481 | &gimodel, sizeof(gimodel)) < 0) | |
268a9eee | 482 | return -1; |
3c7950af SH |
483 | } else if (loss_type == NETEM_LOSS_GE) { |
484 | if (addattr_l(n, 1024, NETEM_LOSS_GE, | |
485 | &gemodel, sizeof(gemodel)) < 0) | |
268a9eee | 486 | return -1; |
3c7950af SH |
487 | } else { |
488 | fprintf(stderr, "loss in the weeds!\n"); | |
489 | return -1; | |
490 | } | |
3d0b7439 | 491 | |
3c7950af SH |
492 | addattr_nest_end(n, start); |
493 | } | |
494 | ||
dad2f72b YY |
495 | if (present[TCA_NETEM_RATE]) { |
496 | if (rate64 >= (1ULL << 32)) { | |
497 | if (addattr_l(n, 1024, | |
498 | TCA_NETEM_RATE64, &rate64, sizeof(rate64)) < 0) | |
499 | return -1; | |
500 | rate.rate = ~0U; | |
501 | } else { | |
502 | rate.rate = rate64; | |
503 | } | |
504 | if (addattr_l(n, 1024, TCA_NETEM_RATE, &rate, sizeof(rate)) < 0) | |
505 | return -1; | |
506 | } | |
6b8dc4de | 507 | |
a31a5d59 | 508 | if (dist_data) { |
c1b81cb5 SH |
509 | if (addattr_l(n, MAX_DIST * sizeof(dist_data[0]), |
510 | TCA_NETEM_DELAY_DIST, | |
511 | dist_data, dist_size * sizeof(dist_data[0])) < 0) | |
a31a5d59 | 512 | return -1; |
c1b81cb5 | 513 | free(dist_data); |
2e21655e | 514 | } |
1a1d22a7 | 515 | tail->rta_len = (void *) NLMSG_TAIL(n) - (void *) tail; |
b7be3d0c | 516 | return 0; |
309a4c90 SH |
517 | } |
518 | ||
519 | static int netem_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt) | |
520 | { | |
2e21655e | 521 | const struct tc_netem_corr *cor = NULL; |
ea8fc104 | 522 | const struct tc_netem_reorder *reorder = NULL; |
a31a5d59 | 523 | const struct tc_netem_corrupt *corrupt = NULL; |
3c7950af SH |
524 | const struct tc_netem_gimodel *gimodel = NULL; |
525 | const struct tc_netem_gemodel *gemodel = NULL; | |
1070205d | 526 | int *ecn = NULL; |
2e21655e | 527 | struct tc_netem_qopt qopt; |
6b8dc4de | 528 | const struct tc_netem_rate *rate = NULL; |
a754de3c | 529 | int len; |
dad2f72b | 530 | __u64 rate64 = 0; |
32a121cb | 531 | |
309a4c90 | 532 | SPRINT_BUF(b1); |
309a4c90 SH |
533 | |
534 | if (opt == NULL) | |
535 | return 0; | |
536 | ||
a754de3c | 537 | len = RTA_PAYLOAD(opt) - sizeof(qopt); |
2e21655e SH |
538 | if (len < 0) { |
539 | fprintf(stderr, "options size error\n"); | |
309a4c90 | 540 | return -1; |
b7be3d0c | 541 | } |
2e21655e SH |
542 | memcpy(&qopt, RTA_DATA(opt), sizeof(qopt)); |
543 | ||
544 | if (len > 0) { | |
1d2d1cb5 | 545 | struct rtattr *tb[TCA_NETEM_MAX+1]; |
32a121cb | 546 | |
2e21655e SH |
547 | parse_rtattr(tb, TCA_NETEM_MAX, RTA_DATA(opt) + sizeof(qopt), |
548 | len); | |
ae665a52 | 549 | |
2e21655e SH |
550 | if (tb[TCA_NETEM_CORR]) { |
551 | if (RTA_PAYLOAD(tb[TCA_NETEM_CORR]) < sizeof(*cor)) | |
552 | return -1; | |
553 | cor = RTA_DATA(tb[TCA_NETEM_CORR]); | |
554 | } | |
ea8fc104 SH |
555 | if (tb[TCA_NETEM_REORDER]) { |
556 | if (RTA_PAYLOAD(tb[TCA_NETEM_REORDER]) < sizeof(*reorder)) | |
557 | return -1; | |
558 | reorder = RTA_DATA(tb[TCA_NETEM_REORDER]); | |
559 | } | |
a31a5d59 SH |
560 | if (tb[TCA_NETEM_CORRUPT]) { |
561 | if (RTA_PAYLOAD(tb[TCA_NETEM_CORRUPT]) < sizeof(*corrupt)) | |
562 | return -1; | |
e9bc3c40 | 563 | corrupt = RTA_DATA(tb[TCA_NETEM_CORRUPT]); |
a31a5d59 | 564 | } |
3c7950af SH |
565 | if (tb[TCA_NETEM_LOSS]) { |
566 | struct rtattr *lb[NETEM_LOSS_MAX + 1]; | |
567 | ||
568 | parse_rtattr_nested(lb, NETEM_LOSS_MAX, tb[TCA_NETEM_LOSS]); | |
569 | if (lb[NETEM_LOSS_GI]) | |
8f9672af | 570 | gimodel = RTA_DATA(lb[NETEM_LOSS_GI]); |
3c7950af SH |
571 | if (lb[NETEM_LOSS_GE]) |
572 | gemodel = RTA_DATA(lb[NETEM_LOSS_GE]); | |
3d0b7439 | 573 | } |
6b8dc4de HPP |
574 | if (tb[TCA_NETEM_RATE]) { |
575 | if (RTA_PAYLOAD(tb[TCA_NETEM_RATE]) < sizeof(*rate)) | |
576 | return -1; | |
577 | rate = RTA_DATA(tb[TCA_NETEM_RATE]); | |
578 | } | |
1070205d VS |
579 | if (tb[TCA_NETEM_ECN]) { |
580 | if (RTA_PAYLOAD(tb[TCA_NETEM_ECN]) < sizeof(*ecn)) | |
581 | return -1; | |
582 | ecn = RTA_DATA(tb[TCA_NETEM_ECN]); | |
583 | } | |
dad2f72b YY |
584 | if (tb[TCA_NETEM_RATE64]) { |
585 | if (RTA_PAYLOAD(tb[TCA_NETEM_RATE64]) < sizeof(rate64)) | |
586 | return -1; | |
587 | rate64 = rta_getattr_u64(tb[TCA_NETEM_RATE64]); | |
588 | } | |
2e21655e | 589 | } |
309a4c90 | 590 | |
2e21655e | 591 | fprintf(f, "limit %d", qopt.limit); |
31fa60e0 | 592 | |
2e21655e SH |
593 | if (qopt.latency) { |
594 | fprintf(f, " delay %s", sprint_ticks(qopt.latency, b1)); | |
b7be3d0c | 595 | |
2e21655e SH |
596 | if (qopt.jitter) { |
597 | fprintf(f, " %s", sprint_ticks(qopt.jitter, b1)); | |
598 | if (cor && cor->delay_corr) | |
599 | fprintf(f, " %s", sprint_percent(cor->delay_corr, b1)); | |
b7be3d0c SH |
600 | } |
601 | } | |
602 | ||
2e21655e SH |
603 | if (qopt.loss) { |
604 | fprintf(f, " loss %s", sprint_percent(qopt.loss, b1)); | |
605 | if (cor && cor->loss_corr) | |
606 | fprintf(f, " %s", sprint_percent(cor->loss_corr, b1)); | |
b7be3d0c SH |
607 | } |
608 | ||
3c7950af SH |
609 | if (gimodel) { |
610 | fprintf(f, " loss state p13 %s", sprint_percent(gimodel->p13, b1)); | |
611 | fprintf(f, " p31 %s", sprint_percent(gimodel->p31, b1)); | |
612 | fprintf(f, " p32 %s", sprint_percent(gimodel->p32, b1)); | |
613 | fprintf(f, " p23 %s", sprint_percent(gimodel->p23, b1)); | |
614 | fprintf(f, " p14 %s", sprint_percent(gimodel->p14, b1)); | |
615 | } | |
616 | ||
617 | if (gemodel) { | |
3757185b | 618 | fprintf(f, " loss gemodel p %s", |
3c7950af SH |
619 | sprint_percent(gemodel->p, b1)); |
620 | fprintf(f, " r %s", sprint_percent(gemodel->r, b1)); | |
e4beb527 | 621 | fprintf(f, " 1-h %s", sprint_percent(UINT32_MAX - |
3757185b | 622 | gemodel->h, b1)); |
3c7950af SH |
623 | fprintf(f, " 1-k %s", sprint_percent(gemodel->k1, b1)); |
624 | } | |
625 | ||
2e21655e | 626 | if (qopt.duplicate) { |
b7be3d0c | 627 | fprintf(f, " duplicate %s", |
2e21655e SH |
628 | sprint_percent(qopt.duplicate, b1)); |
629 | if (cor && cor->dup_corr) | |
630 | fprintf(f, " %s", sprint_percent(cor->dup_corr, b1)); | |
b7be3d0c | 631 | } |
ae665a52 | 632 | |
ea8fc104 | 633 | if (reorder && reorder->probability) { |
ae665a52 | 634 | fprintf(f, " reorder %s", |
ea8fc104 SH |
635 | sprint_percent(reorder->probability, b1)); |
636 | if (reorder->correlation) | |
ae665a52 | 637 | fprintf(f, " %s", |
ea8fc104 SH |
638 | sprint_percent(reorder->correlation, b1)); |
639 | } | |
b7be3d0c | 640 | |
a31a5d59 | 641 | if (corrupt && corrupt->probability) { |
ae665a52 | 642 | fprintf(f, " corrupt %s", |
a31a5d59 SH |
643 | sprint_percent(corrupt->probability, b1)); |
644 | if (corrupt->correlation) | |
ae665a52 | 645 | fprintf(f, " %s", |
a31a5d59 SH |
646 | sprint_percent(corrupt->correlation, b1)); |
647 | } | |
648 | ||
6b8dc4de | 649 | if (rate && rate->rate) { |
dad2f72b YY |
650 | if (rate64) |
651 | fprintf(f, " rate %s", sprint_rate(rate64, b1)); | |
652 | else | |
653 | fprintf(f, " rate %s", sprint_rate(rate->rate, b1)); | |
6b8dc4de HPP |
654 | if (rate->packet_overhead) |
655 | fprintf(f, " packetoverhead %d", rate->packet_overhead); | |
656 | if (rate->cell_size) | |
657 | fprintf(f, " cellsize %u", rate->cell_size); | |
658 | if (rate->cell_overhead) | |
659 | fprintf(f, " celloverhead %d", rate->cell_overhead); | |
660 | } | |
661 | ||
1070205d VS |
662 | if (ecn) |
663 | fprintf(f, " ecn "); | |
664 | ||
2e21655e SH |
665 | if (qopt.gap) |
666 | fprintf(f, " gap %lu", (unsigned long)qopt.gap); | |
309a4c90 | 667 | |
1070205d | 668 | |
309a4c90 SH |
669 | return 0; |
670 | } | |
671 | ||
95812b56 | 672 | struct qdisc_util netem_qdisc_util = { |
32a121cb | 673 | .id = "netem", |
31fa60e0 SH |
674 | .parse_qopt = netem_parse_opt, |
675 | .print_qopt = netem_print_opt, | |
309a4c90 | 676 | }; |