1 /*
2 * m_action.c Action Management
3 *
4 * This program is free software; you can distribute 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: J Hadi Salim (hadi@cyberus.ca)
10 *
11 * TODO:
12 * - parse to be passed a filedescriptor for logging purposes
13 *
14 */
15
16 #include <stdio.h>
17 #include <stdlib.h>
18 #include <unistd.h>
19 #include <syslog.h>
20 #include <fcntl.h>
21 #include <sys/socket.h>
22 #include <netinet/in.h>
23 #include <arpa/inet.h>
24 #include <string.h>
25 #include <dlfcn.h>
26
27 #include "utils.h"
28 #include "tc_common.h"
29 #include "tc_util.h"
30
31 static struct action_util *action_list;
32
33 #ifdef CONFIG_GACT
34 int gact_ld; /* f*ckin backward compatibility */
35 #endif
36 int tab_flush;
37
act_usage(void)38 static void act_usage(void)
39 {
40 /*XXX: In the near future add a action->print_help to improve
41 * usability
42 * This would mean new tc will not be backward compatible
43 * with any action .so from the old days. But if someone really
44 * does that, they would know how to fix this ..
45 *
46 */
47 fprintf(stderr, "usage: tc actions <ACTSPECOP>*\n");
48 fprintf(stderr,
49 "Where: \tACTSPECOP := ACR | GD | FL\n"
50 "\tACR := add | change | replace <ACTSPEC>*\n"
51 "\tGD := get | delete | <ACTISPEC>*\n"
52 "\tFL := ls | list | flush | <ACTNAMESPEC>\n"
53 "\tACTNAMESPEC := action <ACTNAME>\n"
54 "\tACTISPEC := <ACTNAMESPEC> <INDEXSPEC>\n"
55 "\tACTSPEC := action <ACTDETAIL> [INDEXSPEC]\n"
56 "\tINDEXSPEC := index <32 bit indexvalue>\n"
57 "\tACTDETAIL := <ACTNAME> <ACTPARAMS>\n"
58 "\t\tExample ACTNAME is gact, mirred, bpf, etc\n"
59 "\t\tEach action has its own parameters (ACTPARAMS)\n"
60 "\n");
61
62 exit(-1);
63 }
64
print_noaopt(struct action_util * au,FILE * f,struct rtattr * opt)65 static int print_noaopt(struct action_util *au, FILE *f, struct rtattr *opt)
66 {
67 if (opt && RTA_PAYLOAD(opt))
68 fprintf(f, "[Unknown action, optlen=%u] ",
69 (unsigned int) RTA_PAYLOAD(opt));
70 return 0;
71 }
72
parse_noaopt(struct action_util * au,int * argc_p,char *** argv_p,int code,struct nlmsghdr * n)73 static int parse_noaopt(struct action_util *au, int *argc_p, char ***argv_p, int code, struct nlmsghdr *n)
74 {
75 int argc = *argc_p;
76 char **argv = *argv_p;
77
78 if (argc) {
79 fprintf(stderr, "Unknown action \"%s\", hence option \"%s\" is unparsable\n", au->id, *argv);
80 } else {
81 fprintf(stderr, "Unknown action \"%s\"\n", au->id);
82 }
83 return -1;
84 }
85
get_action_kind(char * str)86 static struct action_util *get_action_kind(char *str)
87 {
88 static void *aBODY;
89 void *dlh;
90 char buf[256];
91 struct action_util *a;
92 #ifdef CONFIG_GACT
93 int looked4gact = 0;
94 restart_s:
95 #endif
96 for (a = action_list; a; a = a->next) {
97 if (strcmp(a->id, str) == 0)
98 return a;
99 }
100
101 snprintf(buf, sizeof(buf), "%s/m_%s.so", get_tc_lib(), str);
102 dlh = dlopen(buf, RTLD_LAZY | RTLD_GLOBAL);
103 if (dlh == NULL) {
104 dlh = aBODY;
105 if (dlh == NULL) {
106 dlh = aBODY = dlopen(NULL, RTLD_LAZY);
107 if (dlh == NULL)
108 goto noexist;
109 }
110 }
111
112 snprintf(buf, sizeof(buf), "%s_action_util", str);
113 a = dlsym(dlh, buf);
114 if (a == NULL)
115 goto noexist;
116
117 reg:
118 a->next = action_list;
119 action_list = a;
120 return a;
121
122 noexist:
123 #ifdef CONFIG_GACT
124 if (!looked4gact) {
125 looked4gact = 1;
126 strcpy(str, "gact");
127 goto restart_s;
128 }
129 #endif
130 a = calloc(1, sizeof(*a));
131 if (a) {
132 strncpy(a->id, "noact", 15);
133 a->parse_aopt = parse_noaopt;
134 a->print_aopt = print_noaopt;
135 goto reg;
136 }
137 return a;
138 }
139
140 static int
new_cmd(char ** argv)141 new_cmd(char **argv)
142 {
143 if ((matches(*argv, "change") == 0) ||
144 (matches(*argv, "replace") == 0) ||
145 (matches(*argv, "delete") == 0) ||
146 (matches(*argv, "get") == 0) ||
147 (matches(*argv, "add") == 0))
148 return 1;
149
150 return 0;
151
152 }
153
parse_action(int * argc_p,char *** argv_p,int tca_id,struct nlmsghdr * n)154 int parse_action(int *argc_p, char ***argv_p, int tca_id, struct nlmsghdr *n)
155 {
156 int argc = *argc_p;
157 char **argv = *argv_p;
158 struct rtattr *tail, *tail2;
159 char k[16];
160 int act_ck_len = 0;
161 int ok = 0;
162 int eap = 0; /* expect action parameters */
163
164 int ret = 0;
165 int prio = 0;
166 unsigned char act_ck[TC_COOKIE_MAX_SIZE];
167
168 if (argc <= 0)
169 return -1;
170
171 tail = tail2 = NLMSG_TAIL(n);
172
173 addattr_l(n, MAX_MSG, tca_id, NULL, 0);
174
175 while (argc > 0) {
176
177 memset(k, 0, sizeof(k));
178
179 if (strcmp(*argv, "action") == 0) {
180 argc--;
181 argv++;
182 eap = 1;
183 #ifdef CONFIG_GACT
184 if (!gact_ld) {
185 get_action_kind("gact");
186 }
187 #endif
188 continue;
189 } else if (strcmp(*argv, "flowid") == 0) {
190 break;
191 } else if (strcmp(*argv, "classid") == 0) {
192 break;
193 } else if (strcmp(*argv, "help") == 0) {
194 return -1;
195 } else if (new_cmd(argv)) {
196 goto done0;
197 } else {
198 struct action_util *a = NULL;
199
200 strncpy(k, *argv, sizeof(k) - 1);
201 eap = 0;
202 if (argc > 0) {
203 a = get_action_kind(k);
204 } else {
205 done0:
206 if (ok)
207 break;
208 else
209 goto done;
210 }
211
212 if (a == NULL) {
213 goto bad_val;
214 }
215
216 tail = NLMSG_TAIL(n);
217 addattr_l(n, MAX_MSG, ++prio, NULL, 0);
218 addattr_l(n, MAX_MSG, TCA_ACT_KIND, k, strlen(k) + 1);
219
220 ret = a->parse_aopt(a, &argc, &argv, TCA_ACT_OPTIONS,
221 n);
222
223 if (ret < 0) {
224 fprintf(stderr, "bad action parsing\n");
225 goto bad_val;
226 }
227
228 if (*argv && strcmp(*argv, "cookie") == 0) {
229 size_t slen;
230
231 NEXT_ARG();
232 slen = strlen(*argv);
233 if (slen > TC_COOKIE_MAX_SIZE * 2) {
234 char cookie_err_m[128];
235
236 snprintf(cookie_err_m, 128,
237 "%zd Max allowed size %d",
238 slen, TC_COOKIE_MAX_SIZE*2);
239 invarg(cookie_err_m, *argv);
240 }
241
242 if (hex2mem(*argv, act_ck, slen / 2) < 0)
243 invarg("cookie must be a hex string\n",
244 *argv);
245
246 act_ck_len = slen / 2;
247 argc--;
248 argv++;
249 }
250
251 if (act_ck_len)
252 addattr_l(n, MAX_MSG, TCA_ACT_COOKIE,
253 &act_ck, act_ck_len);
254
255 tail->rta_len = (void *) NLMSG_TAIL(n) - (void *) tail;
256 ok++;
257 }
258 }
259
260 if (eap > 0) {
261 fprintf(stderr, "bad action empty %d\n", eap);
262 goto bad_val;
263 }
264
265 tail2->rta_len = (void *) NLMSG_TAIL(n) - (void *) tail2;
266
267 done:
268 *argc_p = argc;
269 *argv_p = argv;
270 return 0;
271 bad_val:
272 /* no need to undo things, returning from here should
273 * cause enough pain */
274 fprintf(stderr, "parse_action: bad value (%d:%s)!\n", argc, *argv);
275 return -1;
276 }
277
tc_print_one_action(FILE * f,struct rtattr * arg)278 static int tc_print_one_action(FILE *f, struct rtattr *arg)
279 {
280
281 struct rtattr *tb[TCA_ACT_MAX + 1];
282 int err = 0;
283 struct action_util *a = NULL;
284
285 if (arg == NULL)
286 return -1;
287
288 parse_rtattr_nested(tb, TCA_ACT_MAX, arg);
289
290 if (tb[TCA_ACT_KIND] == NULL) {
291 fprintf(stderr, "NULL Action!\n");
292 return -1;
293 }
294
295
296 a = get_action_kind(RTA_DATA(tb[TCA_ACT_KIND]));
297 if (a == NULL)
298 return err;
299
300 err = a->print_aopt(a, f, tb[TCA_ACT_OPTIONS]);
301
302 if (err < 0)
303 return err;
304
305 if (show_stats && tb[TCA_ACT_STATS]) {
306
307 fprintf(f, "\tAction statistics:\n");
308 print_tcstats2_attr(f, tb[TCA_ACT_STATS], "\t", NULL);
309 if (tb[TCA_ACT_COOKIE]) {
310 int strsz = RTA_PAYLOAD(tb[TCA_ACT_COOKIE]);
311 char b1[strsz * 2 + 1];
312
313 fprintf(f, "\n\tcookie len %d %s ", strsz,
314 hexstring_n2a(RTA_DATA(tb[TCA_ACT_COOKIE]),
315 strsz, b1, sizeof(b1)));
316 }
317 fprintf(f, "\n");
318 }
319
320 return 0;
321 }
322
323 static int
tc_print_action_flush(FILE * f,const struct rtattr * arg)324 tc_print_action_flush(FILE *f, const struct rtattr *arg)
325 {
326
327 struct rtattr *tb[TCA_MAX + 1];
328 int err = 0;
329 struct action_util *a = NULL;
330 __u32 *delete_count = 0;
331
332 parse_rtattr_nested(tb, TCA_MAX, arg);
333
334 if (tb[TCA_KIND] == NULL) {
335 fprintf(stderr, "NULL Action!\n");
336 return -1;
337 }
338
339 a = get_action_kind(RTA_DATA(tb[TCA_KIND]));
340 if (a == NULL)
341 return err;
342
343 delete_count = RTA_DATA(tb[TCA_FCNT]);
344 fprintf(f, " %s (%d entries)\n", a->id, *delete_count);
345 tab_flush = 0;
346 return 0;
347 }
348
349 int
tc_print_action(FILE * f,const struct rtattr * arg,unsigned short tot_acts)350 tc_print_action(FILE *f, const struct rtattr *arg, unsigned short tot_acts)
351 {
352
353 int i;
354
355 if (arg == NULL)
356 return 0;
357
358 if (!tot_acts)
359 tot_acts = TCA_ACT_MAX_PRIO;
360
361 struct rtattr *tb[tot_acts + 1];
362
363 parse_rtattr_nested(tb, tot_acts, arg);
364
365 if (tab_flush && NULL != tb[0] && NULL == tb[1])
366 return tc_print_action_flush(f, tb[0]);
367
368 for (i = 0; i < tot_acts; i++) {
369 if (tb[i]) {
370 fprintf(f, "\n\taction order %d: ", i);
371 if (tc_print_one_action(f, tb[i]) < 0) {
372 fprintf(f, "Error printing action\n");
373 }
374 }
375
376 }
377
378 return 0;
379 }
380
print_action(const struct sockaddr_nl * who,struct nlmsghdr * n,void * arg)381 int print_action(const struct sockaddr_nl *who,
382 struct nlmsghdr *n,
383 void *arg)
384 {
385 FILE *fp = (FILE *)arg;
386 struct tcamsg *t = NLMSG_DATA(n);
387 int len = n->nlmsg_len;
388 __u32 *tot_acts = NULL;
389 struct rtattr *tb[TCA_ROOT_MAX+1];
390
391 len -= NLMSG_LENGTH(sizeof(*t));
392
393 if (len < 0) {
394 fprintf(stderr, "Wrong len %d\n", len);
395 return -1;
396 }
397
398 parse_rtattr(tb, TCA_ROOT_MAX, TA_RTA(t), len);
399
400 if (tb[TCA_ROOT_COUNT])
401 tot_acts = RTA_DATA(tb[TCA_ROOT_COUNT]);
402
403 fprintf(fp, "total acts %d\n", tot_acts ? *tot_acts:0);
404 if (tb[TCA_ACT_TAB] == NULL) {
405 if (n->nlmsg_type != RTM_GETACTION)
406 fprintf(stderr, "print_action: NULL kind\n");
407 return -1;
408 }
409
410 if (n->nlmsg_type == RTM_DELACTION) {
411 if (n->nlmsg_flags & NLM_F_ROOT) {
412 fprintf(fp, "Flushed table ");
413 tab_flush = 1;
414 } else {
415 fprintf(fp, "Deleted action ");
416 }
417 }
418
419 if (n->nlmsg_type == RTM_NEWACTION) {
420 if ((n->nlmsg_flags & NLM_F_CREATE) &&
421 !(n->nlmsg_flags & NLM_F_REPLACE)) {
422 fprintf(fp, "Added action ");
423 } else if (n->nlmsg_flags & NLM_F_REPLACE) {
424 fprintf(fp, "Replaced action ");
425 }
426 }
427
428
429 tc_print_action(fp, tb[TCA_ACT_TAB], tot_acts ? *tot_acts:0);
430
431 return 0;
432 }
433
tc_action_gd(int cmd,unsigned int flags,int * argc_p,char *** argv_p)434 static int tc_action_gd(int cmd, unsigned int flags, int *argc_p, char ***argv_p)
435 {
436 char k[16];
437 struct action_util *a = NULL;
438 int argc = *argc_p;
439 char **argv = *argv_p;
440 int prio = 0;
441 int ret = 0;
442 __u32 i = 0;
443 struct rtattr *tail;
444 struct rtattr *tail2;
445 struct nlmsghdr *ans = NULL;
446
447 struct {
448 struct nlmsghdr n;
449 struct tcamsg t;
450 char buf[MAX_MSG];
451 } req = {
452 .n.nlmsg_len = NLMSG_LENGTH(sizeof(struct tcamsg)),
453 .n.nlmsg_flags = NLM_F_REQUEST | flags,
454 .n.nlmsg_type = cmd,
455 .t.tca_family = AF_UNSPEC,
456 };
457
458 argc -= 1;
459 argv += 1;
460
461
462 tail = NLMSG_TAIL(&req.n);
463 addattr_l(&req.n, MAX_MSG, TCA_ACT_TAB, NULL, 0);
464
465 while (argc > 0) {
466 if (strcmp(*argv, "action") == 0) {
467 argc--;
468 argv++;
469 continue;
470 } else if (strcmp(*argv, "help") == 0) {
471 return -1;
472 }
473
474 strncpy(k, *argv, sizeof(k) - 1);
475 a = get_action_kind(k);
476 if (a == NULL) {
477 fprintf(stderr, "Error: non existent action: %s\n", k);
478 ret = -1;
479 goto bad_val;
480 }
481 if (strcmp(a->id, k) != 0) {
482 fprintf(stderr, "Error: non existent action: %s\n", k);
483 ret = -1;
484 goto bad_val;
485 }
486
487 argc -= 1;
488 argv += 1;
489 if (argc <= 0) {
490 fprintf(stderr, "Error: no index specified action: %s\n", k);
491 ret = -1;
492 goto bad_val;
493 }
494
495 if (matches(*argv, "index") == 0) {
496 NEXT_ARG();
497 if (get_u32(&i, *argv, 10)) {
498 fprintf(stderr, "Illegal \"index\"\n");
499 ret = -1;
500 goto bad_val;
501 }
502 argc -= 1;
503 argv += 1;
504 } else {
505 fprintf(stderr, "Error: no index specified action: %s\n", k);
506 ret = -1;
507 goto bad_val;
508 }
509
510 tail2 = NLMSG_TAIL(&req.n);
511 addattr_l(&req.n, MAX_MSG, ++prio, NULL, 0);
512 addattr_l(&req.n, MAX_MSG, TCA_ACT_KIND, k, strlen(k) + 1);
513 if (i > 0)
514 addattr32(&req.n, MAX_MSG, TCA_ACT_INDEX, i);
515 tail2->rta_len = (void *) NLMSG_TAIL(&req.n) - (void *) tail2;
516
517 }
518
519 tail->rta_len = (void *) NLMSG_TAIL(&req.n) - (void *) tail;
520
521 req.n.nlmsg_seq = rth.dump = ++rth.seq;
522 if (cmd == RTM_GETACTION)
523 ans = &req.n;
524
525 if (rtnl_talk(&rth, &req.n, ans, MAX_MSG) < 0) {
526 fprintf(stderr, "We have an error talking to the kernel\n");
527 return 1;
528 }
529
530 if (ans && print_action(NULL, &req.n, (void *)stdout) < 0) {
531 fprintf(stderr, "Dump terminated\n");
532 return 1;
533 }
534
535 *argc_p = argc;
536 *argv_p = argv;
537 bad_val:
538 return ret;
539 }
540
tc_action_modify(int cmd,unsigned int flags,int * argc_p,char *** argv_p)541 static int tc_action_modify(int cmd, unsigned int flags, int *argc_p, char ***argv_p)
542 {
543 int argc = *argc_p;
544 char **argv = *argv_p;
545 int ret = 0;
546 struct {
547 struct nlmsghdr n;
548 struct tcamsg t;
549 char buf[MAX_MSG];
550 } req = {
551 .n.nlmsg_len = NLMSG_LENGTH(sizeof(struct tcamsg)),
552 .n.nlmsg_flags = NLM_F_REQUEST | flags,
553 .n.nlmsg_type = cmd,
554 .t.tca_family = AF_UNSPEC,
555 };
556 struct rtattr *tail = NLMSG_TAIL(&req.n);
557
558 argc -= 1;
559 argv += 1;
560 if (parse_action(&argc, &argv, TCA_ACT_TAB, &req.n)) {
561 fprintf(stderr, "Illegal \"action\"\n");
562 return -1;
563 }
564 tail->rta_len = (void *) NLMSG_TAIL(&req.n) - (void *) tail;
565
566 if (rtnl_talk(&rth, &req.n, NULL, 0) < 0) {
567 fprintf(stderr, "We have an error talking to the kernel\n");
568 ret = -1;
569 }
570
571 *argc_p = argc;
572 *argv_p = argv;
573
574 return ret;
575 }
576
tc_act_list_or_flush(int * argc_p,char *** argv_p,int event)577 static int tc_act_list_or_flush(int *argc_p, char ***argv_p, int event)
578 {
579 struct rtattr *tail, *tail2, *tail3, *tail4;
580 int ret = 0, prio = 0, msg_size = 0;
581 struct action_util *a = NULL;
582 struct nla_bitfield32 flag_select = { 0 };
583 char **argv = *argv_p;
584 __u32 msec_since = 0;
585 int argc = *argc_p;
586 char k[16];
587 struct {
588 struct nlmsghdr n;
589 struct tcamsg t;
590 char buf[MAX_MSG];
591 } req = {
592 .n.nlmsg_len = NLMSG_LENGTH(sizeof(struct tcamsg)),
593 .t.tca_family = AF_UNSPEC,
594 };
595
596 tail = NLMSG_TAIL(&req.n);
597 addattr_l(&req.n, MAX_MSG, TCA_ACT_TAB, NULL, 0);
598 tail2 = NLMSG_TAIL(&req.n);
599
600 strncpy(k, *argv, sizeof(k) - 1);
601 #ifdef CONFIG_GACT
602 if (!gact_ld) {
603 get_action_kind("gact");
604 }
605 #endif
606 a = get_action_kind(k);
607 if (a == NULL) {
608 fprintf(stderr, "bad action %s\n", k);
609 goto bad_val;
610 }
611 if (strcmp(a->id, k) != 0) {
612 fprintf(stderr, "bad action %s\n", k);
613 goto bad_val;
614 }
615 strncpy(k, *argv, sizeof(k) - 1);
616
617 argc -= 1;
618 argv += 1;
619
620 if (argc && (strcmp(*argv, "since") == 0)) {
621 NEXT_ARG();
622 if (get_u32(&msec_since, *argv, 0))
623 invarg("dump time \"since\" is invalid", *argv);
624 }
625
626 addattr_l(&req.n, MAX_MSG, ++prio, NULL, 0);
627 addattr_l(&req.n, MAX_MSG, TCA_ACT_KIND, k, strlen(k) + 1);
628 tail2->rta_len = (void *) NLMSG_TAIL(&req.n) - (void *) tail2;
629 tail->rta_len = (void *) NLMSG_TAIL(&req.n) - (void *) tail;
630
631 tail3 = NLMSG_TAIL(&req.n);
632 flag_select.value |= TCA_FLAG_LARGE_DUMP_ON;
633 flag_select.selector |= TCA_FLAG_LARGE_DUMP_ON;
634 addattr_l(&req.n, MAX_MSG, TCA_ROOT_FLAGS, &flag_select,
635 sizeof(struct nla_bitfield32));
636 tail3->rta_len = (void *) NLMSG_TAIL(&req.n) - (void *) tail3;
637 if (msec_since) {
638 tail4 = NLMSG_TAIL(&req.n);
639 addattr32(&req.n, MAX_MSG, TCA_ROOT_TIME_DELTA, msec_since);
640 tail4->rta_len = (void *) NLMSG_TAIL(&req.n) - (void *) tail4;
641 }
642 msg_size = NLMSG_ALIGN(req.n.nlmsg_len) - NLMSG_ALIGN(sizeof(struct nlmsghdr));
643
644 if (event == RTM_GETACTION) {
645 if (rtnl_dump_request(&rth, event, (void *)&req.t, msg_size) < 0) {
646 perror("Cannot send dump request");
647 return 1;
648 }
649 ret = rtnl_dump_filter(&rth, print_action, stdout);
650 }
651
652 if (event == RTM_DELACTION) {
653 req.n.nlmsg_len = NLMSG_ALIGN(req.n.nlmsg_len);
654 req.n.nlmsg_type = RTM_DELACTION;
655 req.n.nlmsg_flags |= NLM_F_ROOT;
656 req.n.nlmsg_flags |= NLM_F_REQUEST;
657 if (rtnl_talk(&rth, &req.n, NULL, 0) < 0) {
658 fprintf(stderr, "We have an error flushing\n");
659 return 1;
660 }
661
662 }
663
664 bad_val:
665
666 *argc_p = argc;
667 *argv_p = argv;
668 return ret;
669 }
670
do_action(int argc,char ** argv)671 int do_action(int argc, char **argv)
672 {
673
674 int ret = 0;
675
676 while (argc > 0) {
677
678 if (matches(*argv, "add") == 0) {
679 ret = tc_action_modify(RTM_NEWACTION, NLM_F_EXCL|NLM_F_CREATE, &argc, &argv);
680 } else if (matches(*argv, "change") == 0 ||
681 matches(*argv, "replace") == 0) {
682 ret = tc_action_modify(RTM_NEWACTION, NLM_F_CREATE|NLM_F_REPLACE, &argc, &argv);
683 } else if (matches(*argv, "delete") == 0) {
684 argc -= 1;
685 argv += 1;
686 ret = tc_action_gd(RTM_DELACTION, 0, &argc, &argv);
687 } else if (matches(*argv, "get") == 0) {
688 argc -= 1;
689 argv += 1;
690 ret = tc_action_gd(RTM_GETACTION, 0, &argc, &argv);
691 } else if (matches(*argv, "list") == 0 || matches(*argv, "show") == 0
692 || matches(*argv, "lst") == 0) {
693 if (argc <= 2) {
694 act_usage();
695 return -1;
696 }
697
698 argc -= 2;
699 argv += 2;
700 return tc_act_list_or_flush(&argc, &argv,
701 RTM_GETACTION);
702 } else if (matches(*argv, "flush") == 0) {
703 if (argc <= 2) {
704 act_usage();
705 return -1;
706 }
707
708 argc -= 2;
709 argv += 2;
710 return tc_act_list_or_flush(&argc, &argv,
711 RTM_DELACTION);
712 } else if (matches(*argv, "help") == 0) {
713 act_usage();
714 return -1;
715 } else {
716 fprintf(stderr, "Command \"%s\" is unknown, try \"tc actions help\".\n", *argv);
717 return -1;
718 }
719
720 if (ret < 0)
721 return -1;
722 }
723
724 return 0;
725 }
726