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 #ifdef ANDROID
33 extern struct action_util mirred_action_util;
34 #endif
35
36 #ifdef CONFIG_GACT
37 int gact_ld; /* f*ckin backward compatibility */
38 #endif
39 int tab_flush;
40
act_usage(void)41 static void act_usage(void)
42 {
43 /*XXX: In the near future add a action->print_help to improve
44 * usability
45 * This would mean new tc will not be backward compatible
46 * with any action .so from the old days. But if someone really
47 * does that, they would know how to fix this ..
48 *
49 */
50 fprintf(stderr, "usage: tc actions <ACTSPECOP>*\n");
51 fprintf(stderr,
52 "Where: \tACTSPECOP := ACR | GD | FL\n"
53 "\tACR := add | change | replace <ACTSPEC>*\n"
54 "\tGD := get | delete | <ACTISPEC>*\n"
55 "\tFL := ls | list | flush | <ACTNAMESPEC>\n"
56 "\tACTNAMESPEC := action <ACTNAME>\n"
57 "\tACTISPEC := <ACTNAMESPEC> <INDEXSPEC>\n"
58 "\tACTSPEC := action <ACTDETAIL> [INDEXSPEC]\n"
59 "\tINDEXSPEC := index <32 bit indexvalue>\n"
60 "\tACTDETAIL := <ACTNAME> <ACTPARAMS>\n"
61 "\t\tExample ACTNAME is gact, mirred, bpf, etc\n"
62 "\t\tEach action has its own parameters (ACTPARAMS)\n"
63 "\n");
64
65 exit(-1);
66 }
67
print_noaopt(struct action_util * au,FILE * f,struct rtattr * opt)68 static int print_noaopt(struct action_util *au, FILE *f, struct rtattr *opt)
69 {
70 if (opt && RTA_PAYLOAD(opt))
71 fprintf(f, "[Unknown action, optlen=%u] ",
72 (unsigned int) RTA_PAYLOAD(opt));
73 return 0;
74 }
75
parse_noaopt(struct action_util * au,int * argc_p,char *** argv_p,int code,struct nlmsghdr * n)76 static int parse_noaopt(struct action_util *au, int *argc_p, char ***argv_p, int code, struct nlmsghdr *n)
77 {
78 int argc = *argc_p;
79 char **argv = *argv_p;
80
81 if (argc) {
82 fprintf(stderr, "Unknown action \"%s\", hence option \"%s\" is unparsable\n", au->id, *argv);
83 } else {
84 fprintf(stderr, "Unknown action \"%s\"\n", au->id);
85 }
86 return -1;
87 }
88
get_action_kind(char * str)89 static struct action_util *get_action_kind(char *str)
90 {
91 #ifdef ANDROID
92 if (!strcmp(str, "mirred")) {
93 return &mirred_action_util;
94 } else {
95 fprintf(stderr, "Android does not support action '%s'", str);
96 return NULL;
97 }
98 #endif
99 static void *aBODY;
100 void *dlh;
101 char buf[256];
102 struct action_util *a;
103 #ifdef CONFIG_GACT
104 int looked4gact = 0;
105 restart_s:
106 #endif
107 for (a = action_list; a; a = a->next) {
108 if (strcmp(a->id, str) == 0)
109 return a;
110 }
111
112 snprintf(buf, sizeof(buf), "%s/m_%s.so", get_tc_lib(), str);
113 dlh = dlopen(buf, RTLD_LAZY | RTLD_GLOBAL);
114 if (dlh == NULL) {
115 dlh = aBODY;
116 if (dlh == NULL) {
117 dlh = aBODY = dlopen(NULL, RTLD_LAZY);
118 if (dlh == NULL)
119 goto noexist;
120 }
121 }
122
123 snprintf(buf, sizeof(buf), "%s_action_util", str);
124 a = dlsym(dlh, buf);
125 if (a == NULL)
126 goto noexist;
127
128 reg:
129 a->next = action_list;
130 action_list = a;
131 return a;
132
133 noexist:
134 #ifdef CONFIG_GACT
135 if (!looked4gact) {
136 looked4gact = 1;
137 strcpy(str, "gact");
138 goto restart_s;
139 }
140 #endif
141 a = calloc(1, sizeof(*a));
142 if (a) {
143 strncpy(a->id, "noact", 15);
144 a->parse_aopt = parse_noaopt;
145 a->print_aopt = print_noaopt;
146 goto reg;
147 }
148 return a;
149 }
150
151 static int
new_cmd(char ** argv)152 new_cmd(char **argv)
153 {
154 if ((matches(*argv, "change") == 0) ||
155 (matches(*argv, "replace") == 0) ||
156 (matches(*argv, "delete") == 0) ||
157 (matches(*argv, "get") == 0) ||
158 (matches(*argv, "add") == 0))
159 return 1;
160
161 return 0;
162
163 }
164
parse_action(int * argc_p,char *** argv_p,int tca_id,struct nlmsghdr * n)165 int parse_action(int *argc_p, char ***argv_p, int tca_id, struct nlmsghdr *n)
166 {
167 int argc = *argc_p;
168 char **argv = *argv_p;
169 struct rtattr *tail, *tail2;
170 char k[16];
171 int act_ck_len = 0;
172 int ok = 0;
173 int eap = 0; /* expect action parameters */
174
175 int ret = 0;
176 int prio = 0;
177 unsigned char act_ck[TC_COOKIE_MAX_SIZE];
178
179 if (argc <= 0)
180 return -1;
181
182 tail = tail2 = NLMSG_TAIL(n);
183
184 addattr_l(n, MAX_MSG, tca_id, NULL, 0);
185
186 while (argc > 0) {
187
188 memset(k, 0, sizeof(k));
189
190 if (strcmp(*argv, "action") == 0) {
191 argc--;
192 argv++;
193 eap = 1;
194 #ifdef CONFIG_GACT
195 if (!gact_ld) {
196 get_action_kind("gact");
197 }
198 #endif
199 continue;
200 } else if (strcmp(*argv, "flowid") == 0) {
201 break;
202 } else if (strcmp(*argv, "classid") == 0) {
203 break;
204 } else if (strcmp(*argv, "help") == 0) {
205 return -1;
206 } else if (new_cmd(argv)) {
207 goto done0;
208 } else {
209 struct action_util *a = NULL;
210
211 strncpy(k, *argv, sizeof(k) - 1);
212 eap = 0;
213 if (argc > 0) {
214 a = get_action_kind(k);
215 } else {
216 done0:
217 if (ok)
218 break;
219 else
220 goto done;
221 }
222
223 if (a == NULL) {
224 goto bad_val;
225 }
226
227 tail = NLMSG_TAIL(n);
228 addattr_l(n, MAX_MSG, ++prio, NULL, 0);
229 addattr_l(n, MAX_MSG, TCA_ACT_KIND, k, strlen(k) + 1);
230
231 ret = a->parse_aopt(a, &argc, &argv, TCA_ACT_OPTIONS,
232 n);
233
234 if (ret < 0) {
235 fprintf(stderr, "bad action parsing\n");
236 goto bad_val;
237 }
238
239 if (*argv && strcmp(*argv, "cookie") == 0) {
240 size_t slen;
241
242 NEXT_ARG();
243 slen = strlen(*argv);
244 if (slen > TC_COOKIE_MAX_SIZE * 2) {
245 char cookie_err_m[128];
246
247 snprintf(cookie_err_m, 128,
248 "%zd Max allowed size %d",
249 slen, TC_COOKIE_MAX_SIZE*2);
250 invarg(cookie_err_m, *argv);
251 }
252
253 if (hex2mem(*argv, act_ck, slen / 2) < 0)
254 invarg("cookie must be a hex string\n",
255 *argv);
256
257 act_ck_len = slen / 2;
258 argc--;
259 argv++;
260 }
261
262 if (act_ck_len)
263 addattr_l(n, MAX_MSG, TCA_ACT_COOKIE,
264 &act_ck, act_ck_len);
265
266 tail->rta_len = (void *) NLMSG_TAIL(n) - (void *) tail;
267 ok++;
268 }
269 }
270
271 if (eap > 0) {
272 fprintf(stderr, "bad action empty %d\n", eap);
273 goto bad_val;
274 }
275
276 tail2->rta_len = (void *) NLMSG_TAIL(n) - (void *) tail2;
277
278 done:
279 *argc_p = argc;
280 *argv_p = argv;
281 return 0;
282 bad_val:
283 /* no need to undo things, returning from here should
284 * cause enough pain */
285 fprintf(stderr, "parse_action: bad value (%d:%s)!\n", argc, *argv);
286 return -1;
287 }
288
tc_print_one_action(FILE * f,struct rtattr * arg)289 static int tc_print_one_action(FILE *f, struct rtattr *arg)
290 {
291
292 struct rtattr *tb[TCA_ACT_MAX + 1];
293 int err = 0;
294 struct action_util *a = NULL;
295
296 if (arg == NULL)
297 return -1;
298
299 parse_rtattr_nested(tb, TCA_ACT_MAX, arg);
300
301 if (tb[TCA_ACT_KIND] == NULL) {
302 fprintf(stderr, "NULL Action!\n");
303 return -1;
304 }
305
306
307 a = get_action_kind(RTA_DATA(tb[TCA_ACT_KIND]));
308 if (a == NULL)
309 return err;
310
311 err = a->print_aopt(a, f, tb[TCA_ACT_OPTIONS]);
312
313 if (err < 0)
314 return err;
315
316 if (show_stats && tb[TCA_ACT_STATS]) {
317
318 fprintf(f, "\tAction statistics:\n");
319 print_tcstats2_attr(f, tb[TCA_ACT_STATS], "\t", NULL);
320 if (tb[TCA_ACT_COOKIE]) {
321 int strsz = RTA_PAYLOAD(tb[TCA_ACT_COOKIE]);
322 char b1[strsz * 2 + 1];
323
324 fprintf(f, "\n\tcookie len %d %s ", strsz,
325 hexstring_n2a(RTA_DATA(tb[TCA_ACT_COOKIE]),
326 strsz, b1, sizeof(b1)));
327 }
328 fprintf(f, "\n");
329 }
330
331 return 0;
332 }
333
334 static int
tc_print_action_flush(FILE * f,const struct rtattr * arg)335 tc_print_action_flush(FILE *f, const struct rtattr *arg)
336 {
337
338 struct rtattr *tb[TCA_MAX + 1];
339 int err = 0;
340 struct action_util *a = NULL;
341 __u32 *delete_count = 0;
342
343 parse_rtattr_nested(tb, TCA_MAX, arg);
344
345 if (tb[TCA_KIND] == NULL) {
346 fprintf(stderr, "NULL Action!\n");
347 return -1;
348 }
349
350 a = get_action_kind(RTA_DATA(tb[TCA_KIND]));
351 if (a == NULL)
352 return err;
353
354 delete_count = RTA_DATA(tb[TCA_FCNT]);
355 fprintf(f, " %s (%d entries)\n", a->id, *delete_count);
356 tab_flush = 0;
357 return 0;
358 }
359
360 int
tc_print_action(FILE * f,const struct rtattr * arg,unsigned short tot_acts)361 tc_print_action(FILE *f, const struct rtattr *arg, unsigned short tot_acts)
362 {
363
364 int i;
365
366 if (arg == NULL)
367 return 0;
368
369 if (!tot_acts)
370 tot_acts = TCA_ACT_MAX_PRIO;
371
372 struct rtattr *tb[tot_acts + 1];
373
374 parse_rtattr_nested(tb, tot_acts, arg);
375
376 if (tab_flush && NULL != tb[0] && NULL == tb[1])
377 return tc_print_action_flush(f, tb[0]);
378
379 for (i = 0; i < tot_acts; i++) {
380 if (tb[i]) {
381 fprintf(f, "\n\taction order %d: ", i);
382 if (tc_print_one_action(f, tb[i]) < 0) {
383 fprintf(f, "Error printing action\n");
384 }
385 }
386
387 }
388
389 return 0;
390 }
391
print_action(const struct sockaddr_nl * who,struct nlmsghdr * n,void * arg)392 int print_action(const struct sockaddr_nl *who,
393 struct nlmsghdr *n,
394 void *arg)
395 {
396 FILE *fp = (FILE *)arg;
397 struct tcamsg *t = NLMSG_DATA(n);
398 int len = n->nlmsg_len;
399 __u32 *tot_acts = NULL;
400 struct rtattr *tb[TCA_ROOT_MAX+1];
401
402 len -= NLMSG_LENGTH(sizeof(*t));
403
404 if (len < 0) {
405 fprintf(stderr, "Wrong len %d\n", len);
406 return -1;
407 }
408
409 parse_rtattr(tb, TCA_ROOT_MAX, TA_RTA(t), len);
410
411 if (tb[TCA_ROOT_COUNT])
412 tot_acts = RTA_DATA(tb[TCA_ROOT_COUNT]);
413
414 fprintf(fp, "total acts %d\n", tot_acts ? *tot_acts:0);
415 if (tb[TCA_ACT_TAB] == NULL) {
416 if (n->nlmsg_type != RTM_GETACTION)
417 fprintf(stderr, "print_action: NULL kind\n");
418 return -1;
419 }
420
421 if (n->nlmsg_type == RTM_DELACTION) {
422 if (n->nlmsg_flags & NLM_F_ROOT) {
423 fprintf(fp, "Flushed table ");
424 tab_flush = 1;
425 } else {
426 fprintf(fp, "Deleted action ");
427 }
428 }
429
430 if (n->nlmsg_type == RTM_NEWACTION) {
431 if ((n->nlmsg_flags & NLM_F_CREATE) &&
432 !(n->nlmsg_flags & NLM_F_REPLACE)) {
433 fprintf(fp, "Added action ");
434 } else if (n->nlmsg_flags & NLM_F_REPLACE) {
435 fprintf(fp, "Replaced action ");
436 }
437 }
438
439
440 tc_print_action(fp, tb[TCA_ACT_TAB], tot_acts ? *tot_acts:0);
441
442 return 0;
443 }
444
tc_action_gd(int cmd,unsigned int flags,int * argc_p,char *** argv_p)445 static int tc_action_gd(int cmd, unsigned int flags, int *argc_p, char ***argv_p)
446 {
447 char k[16];
448 struct action_util *a = NULL;
449 int argc = *argc_p;
450 char **argv = *argv_p;
451 int prio = 0;
452 int ret = 0;
453 __u32 i = 0;
454 struct rtattr *tail;
455 struct rtattr *tail2;
456 struct nlmsghdr *ans = NULL;
457
458 struct {
459 struct nlmsghdr n;
460 struct tcamsg t;
461 char buf[MAX_MSG];
462 } req = {
463 .n.nlmsg_len = NLMSG_LENGTH(sizeof(struct tcamsg)),
464 .n.nlmsg_flags = NLM_F_REQUEST | flags,
465 .n.nlmsg_type = cmd,
466 .t.tca_family = AF_UNSPEC,
467 };
468
469 argc -= 1;
470 argv += 1;
471
472
473 tail = NLMSG_TAIL(&req.n);
474 addattr_l(&req.n, MAX_MSG, TCA_ACT_TAB, NULL, 0);
475
476 while (argc > 0) {
477 if (strcmp(*argv, "action") == 0) {
478 argc--;
479 argv++;
480 continue;
481 } else if (strcmp(*argv, "help") == 0) {
482 return -1;
483 }
484
485 strncpy(k, *argv, sizeof(k) - 1);
486 a = get_action_kind(k);
487 if (a == NULL) {
488 fprintf(stderr, "Error: non existent action: %s\n", k);
489 ret = -1;
490 goto bad_val;
491 }
492 if (strcmp(a->id, k) != 0) {
493 fprintf(stderr, "Error: non existent action: %s\n", k);
494 ret = -1;
495 goto bad_val;
496 }
497
498 argc -= 1;
499 argv += 1;
500 if (argc <= 0) {
501 fprintf(stderr, "Error: no index specified action: %s\n", k);
502 ret = -1;
503 goto bad_val;
504 }
505
506 if (matches(*argv, "index") == 0) {
507 NEXT_ARG();
508 if (get_u32(&i, *argv, 10)) {
509 fprintf(stderr, "Illegal \"index\"\n");
510 ret = -1;
511 goto bad_val;
512 }
513 argc -= 1;
514 argv += 1;
515 } else {
516 fprintf(stderr, "Error: no index specified action: %s\n", k);
517 ret = -1;
518 goto bad_val;
519 }
520
521 tail2 = NLMSG_TAIL(&req.n);
522 addattr_l(&req.n, MAX_MSG, ++prio, NULL, 0);
523 addattr_l(&req.n, MAX_MSG, TCA_ACT_KIND, k, strlen(k) + 1);
524 if (i > 0)
525 addattr32(&req.n, MAX_MSG, TCA_ACT_INDEX, i);
526 tail2->rta_len = (void *) NLMSG_TAIL(&req.n) - (void *) tail2;
527
528 }
529
530 tail->rta_len = (void *) NLMSG_TAIL(&req.n) - (void *) tail;
531
532 req.n.nlmsg_seq = rth.dump = ++rth.seq;
533 if (cmd == RTM_GETACTION)
534 ans = &req.n;
535
536 if (rtnl_talk(&rth, &req.n, ans, MAX_MSG) < 0) {
537 fprintf(stderr, "We have an error talking to the kernel\n");
538 return 1;
539 }
540
541 if (ans && print_action(NULL, &req.n, (void *)stdout) < 0) {
542 fprintf(stderr, "Dump terminated\n");
543 return 1;
544 }
545
546 *argc_p = argc;
547 *argv_p = argv;
548 bad_val:
549 return ret;
550 }
551
tc_action_modify(int cmd,unsigned int flags,int * argc_p,char *** argv_p)552 static int tc_action_modify(int cmd, unsigned int flags, int *argc_p, char ***argv_p)
553 {
554 int argc = *argc_p;
555 char **argv = *argv_p;
556 int ret = 0;
557 struct {
558 struct nlmsghdr n;
559 struct tcamsg t;
560 char buf[MAX_MSG];
561 } req = {
562 .n.nlmsg_len = NLMSG_LENGTH(sizeof(struct tcamsg)),
563 .n.nlmsg_flags = NLM_F_REQUEST | flags,
564 .n.nlmsg_type = cmd,
565 .t.tca_family = AF_UNSPEC,
566 };
567 struct rtattr *tail = NLMSG_TAIL(&req.n);
568
569 argc -= 1;
570 argv += 1;
571 if (parse_action(&argc, &argv, TCA_ACT_TAB, &req.n)) {
572 fprintf(stderr, "Illegal \"action\"\n");
573 return -1;
574 }
575 tail->rta_len = (void *) NLMSG_TAIL(&req.n) - (void *) tail;
576
577 if (rtnl_talk(&rth, &req.n, NULL, 0) < 0) {
578 fprintf(stderr, "We have an error talking to the kernel\n");
579 ret = -1;
580 }
581
582 *argc_p = argc;
583 *argv_p = argv;
584
585 return ret;
586 }
587
tc_act_list_or_flush(int * argc_p,char *** argv_p,int event)588 static int tc_act_list_or_flush(int *argc_p, char ***argv_p, int event)
589 {
590 struct rtattr *tail, *tail2, *tail3, *tail4;
591 int ret = 0, prio = 0, msg_size = 0;
592 struct action_util *a = NULL;
593 struct nla_bitfield32 flag_select = { 0 };
594 char **argv = *argv_p;
595 __u32 msec_since = 0;
596 int argc = *argc_p;
597 char k[16];
598 struct {
599 struct nlmsghdr n;
600 struct tcamsg t;
601 char buf[MAX_MSG];
602 } req = {
603 .n.nlmsg_len = NLMSG_LENGTH(sizeof(struct tcamsg)),
604 .t.tca_family = AF_UNSPEC,
605 };
606
607 tail = NLMSG_TAIL(&req.n);
608 addattr_l(&req.n, MAX_MSG, TCA_ACT_TAB, NULL, 0);
609 tail2 = NLMSG_TAIL(&req.n);
610
611 strncpy(k, *argv, sizeof(k) - 1);
612 #ifdef CONFIG_GACT
613 if (!gact_ld) {
614 get_action_kind("gact");
615 }
616 #endif
617 a = get_action_kind(k);
618 if (a == NULL) {
619 fprintf(stderr, "bad action %s\n", k);
620 goto bad_val;
621 }
622 if (strcmp(a->id, k) != 0) {
623 fprintf(stderr, "bad action %s\n", k);
624 goto bad_val;
625 }
626 strncpy(k, *argv, sizeof(k) - 1);
627
628 argc -= 1;
629 argv += 1;
630
631 if (argc && (strcmp(*argv, "since") == 0)) {
632 NEXT_ARG();
633 if (get_u32(&msec_since, *argv, 0))
634 invarg("dump time \"since\" is invalid", *argv);
635 }
636
637 addattr_l(&req.n, MAX_MSG, ++prio, NULL, 0);
638 addattr_l(&req.n, MAX_MSG, TCA_ACT_KIND, k, strlen(k) + 1);
639 tail2->rta_len = (void *) NLMSG_TAIL(&req.n) - (void *) tail2;
640 tail->rta_len = (void *) NLMSG_TAIL(&req.n) - (void *) tail;
641
642 tail3 = NLMSG_TAIL(&req.n);
643 flag_select.value |= TCA_FLAG_LARGE_DUMP_ON;
644 flag_select.selector |= TCA_FLAG_LARGE_DUMP_ON;
645 addattr_l(&req.n, MAX_MSG, TCA_ROOT_FLAGS, &flag_select,
646 sizeof(struct nla_bitfield32));
647 tail3->rta_len = (void *) NLMSG_TAIL(&req.n) - (void *) tail3;
648 if (msec_since) {
649 tail4 = NLMSG_TAIL(&req.n);
650 addattr32(&req.n, MAX_MSG, TCA_ROOT_TIME_DELTA, msec_since);
651 tail4->rta_len = (void *) NLMSG_TAIL(&req.n) - (void *) tail4;
652 }
653 msg_size = NLMSG_ALIGN(req.n.nlmsg_len) - NLMSG_ALIGN(sizeof(struct nlmsghdr));
654
655 if (event == RTM_GETACTION) {
656 if (rtnl_dump_request(&rth, event, (void *)&req.t, msg_size) < 0) {
657 perror("Cannot send dump request");
658 return 1;
659 }
660 ret = rtnl_dump_filter(&rth, print_action, stdout);
661 }
662
663 if (event == RTM_DELACTION) {
664 req.n.nlmsg_len = NLMSG_ALIGN(req.n.nlmsg_len);
665 req.n.nlmsg_type = RTM_DELACTION;
666 req.n.nlmsg_flags |= NLM_F_ROOT;
667 req.n.nlmsg_flags |= NLM_F_REQUEST;
668 if (rtnl_talk(&rth, &req.n, NULL, 0) < 0) {
669 fprintf(stderr, "We have an error flushing\n");
670 return 1;
671 }
672
673 }
674
675 bad_val:
676
677 *argc_p = argc;
678 *argv_p = argv;
679 return ret;
680 }
681
do_action(int argc,char ** argv)682 int do_action(int argc, char **argv)
683 {
684
685 int ret = 0;
686
687 while (argc > 0) {
688
689 if (matches(*argv, "add") == 0) {
690 ret = tc_action_modify(RTM_NEWACTION, NLM_F_EXCL|NLM_F_CREATE, &argc, &argv);
691 } else if (matches(*argv, "change") == 0 ||
692 matches(*argv, "replace") == 0) {
693 ret = tc_action_modify(RTM_NEWACTION, NLM_F_CREATE|NLM_F_REPLACE, &argc, &argv);
694 } else if (matches(*argv, "delete") == 0) {
695 argc -= 1;
696 argv += 1;
697 ret = tc_action_gd(RTM_DELACTION, 0, &argc, &argv);
698 } else if (matches(*argv, "get") == 0) {
699 argc -= 1;
700 argv += 1;
701 ret = tc_action_gd(RTM_GETACTION, 0, &argc, &argv);
702 } else if (matches(*argv, "list") == 0 || matches(*argv, "show") == 0
703 || matches(*argv, "lst") == 0) {
704 if (argc <= 2) {
705 act_usage();
706 return -1;
707 }
708
709 argc -= 2;
710 argv += 2;
711 return tc_act_list_or_flush(&argc, &argv,
712 RTM_GETACTION);
713 } else if (matches(*argv, "flush") == 0) {
714 if (argc <= 2) {
715 act_usage();
716 return -1;
717 }
718
719 argc -= 2;
720 argv += 2;
721 return tc_act_list_or_flush(&argc, &argv,
722 RTM_DELACTION);
723 } else if (matches(*argv, "help") == 0) {
724 act_usage();
725 return -1;
726 } else {
727 fprintf(stderr, "Command \"%s\" is unknown, try \"tc actions help\".\n", *argv);
728 return -1;
729 }
730
731 if (ret < 0)
732 return -1;
733 }
734
735 return 0;
736 }
737