1 /* vi: set sw=4 ts=4: */
3 * tc.c "tc" utility frontend.
5 * Licensed under GPLv2 or later, see file LICENSE in this source tree.
7 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
9 * Bernhard Reutner-Fischer adjusted for busybox
14 #include "libiproute/utils.h"
15 #include "libiproute/ip_common.h"
16 #include "libiproute/rt_names.h"
17 #include <linux/pkt_sched.h> /* for the TC_H_* macros */
19 #define parse_rtattr_nested(tb, max, rta) \
20 (parse_rtattr((tb), (max), RTA_DATA(rta), RTA_PAYLOAD(rta)))
22 /* nullifies tb on error */
23 #define __parse_rtattr_nested_compat(tb, max, rta, len) \
24 ({if ((RTA_PAYLOAD(rta) >= len) && \
25 (RTA_PAYLOAD(rta) >= RTA_ALIGN(len) + sizeof(struct rtattr))) { \
26 rta = RTA_DATA(rta) + RTA_ALIGN(len); \
27 parse_rtattr_nested(tb, max, rta); \
29 memset(tb, 0, sizeof(struct rtattr *) * (max + 1)); \
32 #define parse_rtattr_nested_compat(tb, max, rta, data, len) \
33 ({data = RTA_PAYLOAD(rta) >= len ? RTA_DATA(rta) : NULL; \
34 __parse_rtattr_nested_compat(tb, max, rta, len); })
36 #define show_details (0) /* not implemented. Does anyone need it? */
37 #define use_iec (0) /* not currently documented in the upstream manpage */
47 #define G (*(struct globals*)&bb_common_bufsiz1)
48 #define filter_ifindex (G.filter_ifindex)
49 #define filter_qdisc (G.filter_qdisc)
50 #define filter_parent (G.filter_parent)
51 #define filter_prio (G.filter_prio)
52 #define filter_proto (G.filter_proto)
54 void BUG_tc_globals_too_big(void);
55 #define INIT_G() do { \
56 if (sizeof(G) > COMMON_BUFSIZE) \
57 BUG_tc_globals_too_big(); \
60 /* Allocates a buffer containing the name of a class id.
61 * The caller must free the returned memory. */
62 static char* print_tc_classid(uint32_t cid)
64 #if 0 /* IMPOSSIBLE */
66 return xasprintf("root");
69 if (cid == TC_H_UNSPEC)
70 return xasprintf("none");
71 else if (TC_H_MAJ(cid) == 0)
72 return xasprintf(":%x", TC_H_MIN(cid));
73 else if (TC_H_MIN(cid) == 0)
74 return xasprintf("%x:", TC_H_MAJ(cid)>>16);
76 return xasprintf("%x:%x", TC_H_MAJ(cid)>>16, TC_H_MIN(cid));
79 /* Get a qdisc handle. Return 0 on success, !0 otherwise. */
80 static int get_qdisc_handle(__u32 *h, const char *str) {
85 if (!strcmp(str, "none"))
87 maj = strtoul(str, &p, 16);
91 if (*p != ':' && *p != '\0')
98 /* Get class ID. Return 0 on success, !0 otherwise. */
99 static int get_tc_classid(__u32 *h, const char *str) {
104 if (!strcmp(str, "root"))
107 if (!strcmp(str, "none"))
109 maj = strtoul(str, &p, 16);
120 min = strtoul(str, &p, 16);
121 //FIXME: check for "" too?
122 if (*p != '\0' || min >= (1<<16))
132 static void print_rate(char *buf, int len, uint32_t rate)
134 double tmp = (double)rate*8;
137 if (tmp >= 1000.0*1024.0*1024.0)
138 snprintf(buf, len, "%.0fMibit", tmp/1024.0*1024.0);
139 else if (tmp >= 1000.0*1024)
140 snprintf(buf, len, "%.0fKibit", tmp/1024);
142 snprintf(buf, len, "%.0fbit", tmp);
144 if (tmp >= 1000.0*1000000.0)
145 snprintf(buf, len, "%.0fMbit", tmp/1000000.0);
146 else if (tmp >= 1000.0 * 1000.0)
147 snprintf(buf, len, "%.0fKbit", tmp/1000.0);
149 snprintf(buf, len, "%.0fbit", tmp);
153 /* This is "pfifo_fast". */
154 static int prio_parse_opt(int argc, char **argv, struct nlmsghdr *n)
158 static int prio_print_opt(struct rtattr *opt)
161 struct tc_prio_qopt *qopt;
162 struct rtattr *tb[TCA_PRIO_MAX+1];
166 parse_rtattr_nested_compat(tb, TCA_PRIO_MAX, opt, qopt, sizeof(*qopt));
169 printf("bands %u priomap ", qopt->bands);
170 for (i=0; i<=TC_PRIO_MAX; i++)
171 printf(" %d", qopt->priomap[i]);
174 printf(" multiqueue: o%s ",
175 *(unsigned char *)RTA_DATA(tb[TCA_PRIO_MQ]) ? "n" : "ff");
180 /* Class Based Queue */
181 static int cbq_parse_opt(int argc, char **argv, struct nlmsghdr *n)
185 static int cbq_print_opt(struct rtattr *opt)
187 struct rtattr *tb[TCA_CBQ_MAX+1];
188 struct tc_ratespec *r = NULL;
189 struct tc_cbq_lssopt *lss = NULL;
190 struct tc_cbq_wrropt *wrr = NULL;
191 struct tc_cbq_fopt *fopt = NULL;
192 struct tc_cbq_ovl *ovl = NULL;
193 const char *const error = "CBQ: too short %s opt";
198 parse_rtattr_nested(tb, TCA_CBQ_MAX, opt);
200 if (tb[TCA_CBQ_RATE]) {
201 if (RTA_PAYLOAD(tb[TCA_CBQ_RATE]) < sizeof(*r))
202 bb_error_msg(error, "rate");
204 r = RTA_DATA(tb[TCA_CBQ_RATE]);
206 if (tb[TCA_CBQ_LSSOPT]) {
207 if (RTA_PAYLOAD(tb[TCA_CBQ_LSSOPT]) < sizeof(*lss))
208 bb_error_msg(error, "lss");
210 lss = RTA_DATA(tb[TCA_CBQ_LSSOPT]);
212 if (tb[TCA_CBQ_WRROPT]) {
213 if (RTA_PAYLOAD(tb[TCA_CBQ_WRROPT]) < sizeof(*wrr))
214 bb_error_msg(error, "wrr");
216 wrr = RTA_DATA(tb[TCA_CBQ_WRROPT]);
218 if (tb[TCA_CBQ_FOPT]) {
219 if (RTA_PAYLOAD(tb[TCA_CBQ_FOPT]) < sizeof(*fopt))
220 bb_error_msg(error, "fopt");
222 fopt = RTA_DATA(tb[TCA_CBQ_FOPT]);
224 if (tb[TCA_CBQ_OVL_STRATEGY]) {
225 if (RTA_PAYLOAD(tb[TCA_CBQ_OVL_STRATEGY]) < sizeof(*ovl))
226 bb_error_msg("CBQ: too short overlimit strategy %u/%u",
227 (unsigned) RTA_PAYLOAD(tb[TCA_CBQ_OVL_STRATEGY]),
228 (unsigned) sizeof(*ovl));
230 ovl = RTA_DATA(tb[TCA_CBQ_OVL_STRATEGY]);
234 print_rate(buf, sizeof(buf), r->rate);
235 printf("rate %s ", buf);
237 printf("cell %ub ", 1<<r->cell_log);
239 printf("mpu %ub ", r->mpu);
241 printf("overhead %ub ", r->overhead);
244 if (lss && lss->flags) {
247 if (lss->flags&TCF_CBQ_LSS_BOUNDED) {
251 if (lss->flags&TCF_CBQ_LSS_ISOLATED) {
259 if (wrr->priority != TC_CBQ_MAXPRIO)
260 printf("prio %u", wrr->priority);
262 printf("prio no-transmit");
264 printf("/%u ", wrr->cpriority);
265 if (wrr->weight != 1) {
266 print_rate(buf, sizeof(buf), wrr->weight);
267 printf("weight %s ", buf);
270 printf("allot %ub ", wrr->allot);
277 static int print_qdisc(const struct sockaddr_nl *who UNUSED_PARAM,
278 struct nlmsghdr *hdr, void *arg UNUSED_PARAM)
280 struct tcmsg *msg = NLMSG_DATA(hdr);
281 int len = hdr->nlmsg_len;
282 struct rtattr * tb[TCA_MAX+1];
285 if (hdr->nlmsg_type != RTM_NEWQDISC && hdr->nlmsg_type != RTM_DELQDISC) {
286 /* bb_error_msg("not a qdisc"); */
287 return 0; /* ??? mimic upstream; should perhaps return -1 */
289 len -= NLMSG_LENGTH(sizeof(*msg));
291 /* bb_error_msg("wrong len %d", len); */
294 /* not the desired interface? */
295 if (filter_ifindex && filter_ifindex != msg->tcm_ifindex)
297 memset (tb, 0, sizeof(tb));
298 parse_rtattr(tb, TCA_MAX, TCA_RTA(msg), len);
299 if (tb[TCA_KIND] == NULL) {
300 /* bb_error_msg("%s: NULL kind", "qdisc"); */
303 if (hdr->nlmsg_type == RTM_DELQDISC)
305 name = (char*)RTA_DATA(tb[TCA_KIND]);
306 printf("qdisc %s %x: ", name, msg->tcm_handle>>16);
307 if (filter_ifindex == 0)
308 printf("dev %s ", ll_index_to_name(msg->tcm_ifindex));
309 if (msg->tcm_parent == TC_H_ROOT)
311 else if (msg->tcm_parent) {
312 char *classid = print_tc_classid(msg->tcm_parent);
313 printf("parent %s ", classid);
314 if (ENABLE_FEATURE_CLEAN_UP)
317 if (msg->tcm_info != 1)
318 printf("refcnt %d ", msg->tcm_info);
319 if (tb[TCA_OPTIONS]) {
320 static const char _q_[] ALIGN1 = "pfifo_fast\0""cbq\0";
321 int qqq = index_in_strings(_q_, name);
322 if (qqq == 0) { /* pfifo_fast aka prio */
323 prio_print_opt(tb[TCA_OPTIONS]);
324 } else if (qqq == 1) { /* class based queuing */
325 cbq_print_opt(tb[TCA_OPTIONS]);
327 bb_error_msg("unknown %s", name);
333 static int print_class(const struct sockaddr_nl *who UNUSED_PARAM,
334 struct nlmsghdr *hdr, void *arg UNUSED_PARAM)
336 struct tcmsg *msg = NLMSG_DATA(hdr);
337 int len = hdr->nlmsg_len;
338 struct rtattr * tb[TCA_MAX+1];
339 char *name, *classid;
341 /*XXX Eventually factor out common code */
343 if (hdr->nlmsg_type != RTM_NEWTCLASS && hdr->nlmsg_type != RTM_DELTCLASS) {
344 /* bb_error_msg("not a class"); */
345 return 0; /* ??? mimic upstream; should perhaps return -1 */
347 len -= NLMSG_LENGTH(sizeof(*msg));
349 /* bb_error_msg("wrong len %d", len); */
352 /* not the desired interface? */
353 if (filter_qdisc && TC_H_MAJ(msg->tcm_handle^filter_qdisc))
355 memset (tb, 0, sizeof(tb));
356 parse_rtattr(tb, TCA_MAX, TCA_RTA(msg), len);
357 if (tb[TCA_KIND] == NULL) {
358 /* bb_error_msg("%s: NULL kind", "class"); */
361 if (hdr->nlmsg_type == RTM_DELTCLASS)
364 name = (char*)RTA_DATA(tb[TCA_KIND]);
365 classid = !msg->tcm_handle ? NULL : print_tc_classid(
366 filter_qdisc ? TC_H_MIN(msg->tcm_parent) : msg->tcm_parent);
367 printf ("class %s %s", name, classid);
368 if (ENABLE_FEATURE_CLEAN_UP)
371 if (filter_ifindex == 0)
372 printf("dev %s ", ll_index_to_name(msg->tcm_ifindex));
373 if (msg->tcm_parent == TC_H_ROOT)
375 else if (msg->tcm_parent) {
376 classid = print_tc_classid(filter_qdisc ?
377 TC_H_MIN(msg->tcm_parent) : msg->tcm_parent);
378 printf("parent %s ", classid);
379 if (ENABLE_FEATURE_CLEAN_UP)
383 printf("leaf %x ", msg->tcm_info >> 16);
384 /* Do that get_qdisc_kind(RTA_DATA(tb[TCA_KIND])). */
385 if (tb[TCA_OPTIONS]) {
386 static const char _q_[] ALIGN1 = "pfifo_fast\0""cbq\0";
387 int qqq = index_in_strings(_q_, name);
388 if (qqq == 0) { /* pfifo_fast aka prio */
389 /* nothing. */ /*prio_print_opt(tb[TCA_OPTIONS]);*/
390 } else if (qqq == 1) { /* class based queuing */
391 /* cbq_print_copt() is identical to cbq_print_opt(). */
392 cbq_print_opt(tb[TCA_OPTIONS]);
394 bb_error_msg("unknown %s", name);
401 static int print_filter(const struct sockaddr_nl *who UNUSED_PARAM,
402 struct nlmsghdr *hdr, void *arg UNUSED_PARAM)
404 struct tcmsg *msg = NLMSG_DATA(hdr);
405 int len = hdr->nlmsg_len;
406 struct rtattr * tb[TCA_MAX+1];
410 int tc_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
411 int tc_main(int argc UNUSED_PARAM, char **argv)
413 static const char objects[] ALIGN1 =
414 "qdisc\0""class\0""filter\0"
416 enum { OBJ_qdisc = 0, OBJ_class, OBJ_filter };
417 static const char commands[] ALIGN1 =
418 "add\0""delete\0""change\0"
419 "link\0" /* only qdisc */
423 static const char args[] ALIGN1 =
424 "dev\0" /* qdisc, class, filter */
425 "root\0" /* class, filter */
426 "parent\0" /* class, filter */
427 "qdisc\0" /* class */
428 "handle\0" /* change: qdisc, class(classid) list: filter */
429 "classid\0" /* change: for class use "handle" */
430 "preference\0""priority\0""protocol\0" /* filter */
432 enum { CMD_add = 0, CMD_del, CMD_change, CMD_link, CMD_replace, CMD_show };
433 enum { ARG_dev = 0, ARG_root, ARG_parent, ARG_qdisc,
434 ARG_handle, ARG_classid, ARG_pref, ARG_prio, ARG_proto};
435 struct rtnl_handle rth;
437 int ret, obj, cmd, arg;
447 obj = index_in_substrings(objects, *argv++);
452 cmd = CMD_show; /* list is the default */
454 cmd = index_in_substrings(commands, *argv);
456 bb_error_msg_and_die(bb_msg_invalid_arg, *argv, applet_name);
459 memset(&msg, 0, sizeof(msg));
460 msg.tcm_family = AF_UNSPEC;
463 arg = index_in_substrings(args, *argv);
464 if (arg == ARG_dev) {
467 duparg2("dev", *argv);
469 msg.tcm_ifindex = xll_name_to_index(dev);
471 filter_ifindex = msg.tcm_ifindex;
473 if ((arg == ARG_qdisc && obj == OBJ_class && cmd >= CMD_show)
474 || (arg == ARG_handle && obj == OBJ_qdisc && cmd == CMD_change)
477 /* We don't care about duparg2("qdisc handle",*argv) for now */
478 if (get_qdisc_handle(&filter_qdisc, *argv))
479 invarg(*argv, "qdisc");
484 || (obj == OBJ_filter && arg >= ARG_pref)
489 invarg(*argv, "command");
492 if (arg == ARG_root) {
494 duparg("parent", *argv);
495 msg.tcm_parent = TC_H_ROOT;
496 if (obj == OBJ_filter)
497 filter_parent = TC_H_ROOT;
498 } else if (arg == ARG_parent) {
501 duparg(*argv, "parent");
502 if (get_tc_classid(&handle, *argv))
503 invarg(*argv, "parent");
504 msg.tcm_parent = handle;
505 if (obj == OBJ_filter)
506 filter_parent = handle;
507 } else if (arg == ARG_handle) { /* filter::list */
509 duparg(*argv, "handle");
510 /* reject LONG_MIN || LONG_MAX */
512 if ((slash = strchr(handle, '/')) != NULL)
515 msg.tcm_handle = get_u32(*argv, "handle");
516 /* if (slash) {if (get_u32(__u32 &mask, slash+1, NULL)) inv mask; addattr32(n, MAX_MSG, TCA_FW_MASK, mask); */
517 } else if (arg == ARG_classid && obj == OBJ_class && cmd == CMD_change){
518 } else if (arg == ARG_pref || arg == ARG_prio) { /* filter::list */
520 duparg(*argv, "priority");
521 filter_prio = get_u32(*argv, "priority");
522 } else if (arg == ARG_proto) { /* filter::list */
525 duparg(*argv, "protocol");
526 if (ll_proto_a2n(&tmp, *argv))
527 invarg(*argv, "protocol");
531 if (cmd >= CMD_show) { /* show or list */
532 if (obj == OBJ_filter)
533 msg.tcm_info = TC_H_MAKE(filter_prio<<16, filter_proto);
534 if (rtnl_dump_request(&rth, obj == OBJ_qdisc ? RTM_GETQDISC :
535 obj == OBJ_class ? RTM_GETTCLASS : RTM_GETTFILTER,
536 &msg, sizeof(msg)) < 0)
537 bb_simple_perror_msg_and_die("can't send dump request");
539 xrtnl_dump_filter(&rth, obj == OBJ_qdisc ? print_qdisc :
540 obj == OBJ_class ? print_class : print_filter,
543 if (ENABLE_FEATURE_CLEAN_UP) {