LXR busybox/networking/tc.c

   1/* vi: set sw=4 ts=4: */
   2/*
   3 * Licensed under GPLv2 or later, see file LICENSE in this source tree.
   4 *
   5 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
   6 *
   7 * Bernhard Reutner-Fischer adjusted for busybox
   8 */
   9//config:config TC
  10//config:       bool "tc (8.3 kb)"
  11//config:       default y
  12//config:       help
  13//config:       Show / manipulate traffic control settings
  14//config:
  15//config:config FEATURE_TC_INGRESS
  16//config:       bool "Enable ingress"
  17//config:       default y
  18//config:       depends on TC
  19
  20//applet:IF_TC(APPLET(tc, BB_DIR_SBIN, BB_SUID_DROP))
  21
  22//kbuild:lib-$(CONFIG_TC) += tc.o
  23
  24//usage:#define tc_trivial_usage
  25/* //usage: "[OPTIONS] OBJECT CMD [dev STRING]" */
  26//usage:        "OBJECT CMD [dev STRING]"
  27//usage:#define tc_full_usage "\n\n"
  28//usage:        "OBJECT: qdisc|class|filter\n"
  29//usage:        "CMD: add|del|change|replace|show\n"
  30//usage:        "\n"
  31//usage:        "qdisc [handle QHANDLE] [root|"IF_FEATURE_TC_INGRESS("ingress|")"parent CLASSID]\n"
  32/* //usage: "[estimator INTERVAL TIME_CONSTANT]\n" */
  33//usage:        "       [[QDISC_KIND] [help|OPTIONS]]\n"
  34//usage:        "       QDISC_KIND := [p|b]fifo|tbf|prio|cbq|red|etc.\n"
  35//usage:        "qdisc show [dev STRING]"IF_FEATURE_TC_INGRESS(" [ingress]")"\n"
  36//usage:        "class [classid CLASSID] [root|parent CLASSID]\n"
  37//usage:        "       [[QDISC_KIND] [help|OPTIONS] ]\n"
  38//usage:        "class show [ dev STRING ] [root|parent CLASSID]\n"
  39//usage:        "filter [pref PRIO] [protocol PROTO]\n"
  40/* //usage: "\t[estimator INTERVAL TIME_CONSTANT]\n" */
  41//usage:        "       [root|classid CLASSID] [handle FILTERID]\n"
  42//usage:        "       [[FILTER_TYPE] [help|OPTIONS]]\n"
  43//usage:        "filter show [dev STRING] [root|parent CLASSID]"
  44
  45#include "libbb.h"
  46#include "common_bufsiz.h"
  47
  48#include "libiproute/utils.h"
  49#include "libiproute/ip_common.h"
  50#include "libiproute/rt_names.h"
  51#include <linux/pkt_sched.h> /* for the TC_H_* macros */
  52
  53/* This is the deprecated multiqueue interface */
  54#ifndef TCA_PRIO_MAX
  55enum
  56{
  57        TCA_PRIO_UNSPEC,
  58        TCA_PRIO_MQ,
  59        __TCA_PRIO_MAX
  60};
  61#define TCA_PRIO_MAX    (__TCA_PRIO_MAX - 1)
  62#endif
  63
  64#define parse_rtattr_nested(tb, max, rta) \
  65        (parse_rtattr((tb), (max), RTA_DATA(rta), RTA_PAYLOAD(rta)))
  66
  67/* nullifies tb on error */
  68#define __parse_rtattr_nested_compat(tb, max, rta, len) \
  69({ \
  70        if ((RTA_PAYLOAD(rta) >= len) \
  71         && (RTA_PAYLOAD(rta) >= RTA_ALIGN(len) + sizeof(struct rtattr)) \
  72        ) { \
  73                rta = RTA_DATA(rta) + RTA_ALIGN(len); \
  74                parse_rtattr_nested(tb, max, rta); \
  75        } else \
  76                memset(tb, 0, sizeof(struct rtattr *) * (max + 1)); \
  77})
  78
  79#define parse_rtattr_nested_compat(tb, max, rta, data, len) \
  80({ \
  81        data = RTA_PAYLOAD(rta) >= len ? RTA_DATA(rta) : NULL; \
  82        __parse_rtattr_nested_compat(tb, max, rta, len); \
  83})
  84
  85#define show_details (0) /* not implemented. Does anyone need it? */
  86#define use_iec (0) /* not currently documented in the upstream manpage */
  87
  88
  89struct globals {
  90        int filter_ifindex;
  91        uint32_t filter_qdisc;
  92        uint32_t filter_parent;
  93        uint32_t filter_prio;
  94        uint32_t filter_proto;
  95} FIX_ALIASING;
  96#define G (*(struct globals*)bb_common_bufsiz1)
  97#define filter_ifindex (G.filter_ifindex)
  98#define filter_qdisc (G.filter_qdisc)
  99#define filter_parent (G.filter_parent)
 100#define filter_prio (G.filter_prio)
 101#define filter_proto (G.filter_proto)
 102#define INIT_G() do { \
 103        setup_common_bufsiz(); \
 104        BUILD_BUG_ON(sizeof(G) > COMMON_BUFSIZE); \
 105} while (0)
 106
 107/* Allocates a buffer containing the name of a class id.
 108 * The caller must free the returned memory.  */
 109static char* print_tc_classid(uint32_t cid)
 110{
 111#if 0 /* IMPOSSIBLE */
 112        if (cid == TC_H_ROOT)
 113                return xasprintf("root");
 114        else
 115#endif
 116        if (cid == TC_H_UNSPEC)
 117                return xasprintf("none");
 118        else if (TC_H_MAJ(cid) == 0)
 119                return xasprintf(":%x", TC_H_MIN(cid));
 120        else if (TC_H_MIN(cid) == 0)
 121                return xasprintf("%x:", TC_H_MAJ(cid)>>16);
 122        else
 123                return xasprintf("%x:%x", TC_H_MAJ(cid)>>16, TC_H_MIN(cid));
 124}
 125
 126/* Get a qdisc handle.  Return 0 on success, !0 otherwise.  */
 127static int get_qdisc_handle(uint32_t *h, const char *str) {
 128        uint32_t maj;
 129        char *p;
 130
 131        maj = TC_H_UNSPEC;
 132        if (strcmp(str, "none") == 0)
 133                goto ok;
 134        maj = strtoul(str, &p, 16);
 135        if (p == str)
 136                return 1;
 137        maj <<= 16;
 138        if (*p != ':' && *p != '\0')
 139                return 1;
 140 ok:
 141        *h = maj;
 142        return 0;
 143}
 144
 145/* Get class ID.  Return 0 on success, !0 otherwise.  */
 146static int get_tc_classid(uint32_t *h, const char *str) {
 147        uint32_t maj, min;
 148        char *p;
 149
 150        maj = TC_H_ROOT;
 151        if (strcmp(str, "root") == 0)
 152                goto ok;
 153        maj = TC_H_UNSPEC;
 154        if (strcmp(str, "none") == 0)
 155                goto ok;
 156        maj = strtoul(str, &p, 16);
 157        if (p == str) {
 158                if (*p != ':')
 159                        return 1;
 160                maj = 0;
 161        }
 162        if (*p == ':') {
 163                if (maj >= (1<<16))
 164                        return 1;
 165                maj <<= 16;
 166                str = p + 1;
 167                min = strtoul(str, &p, 16);
 168//FIXME: check for "" too?
 169                if (*p != '\0' || min >= (1<<16))
 170                        return 1;
 171                maj |= min;
 172        } else if (*p != 0)
 173                return 1;
 174 ok:
 175        *h = maj;
 176        return 0;
 177}
 178
 179static void print_rate(char *buf, int len, uint32_t rate)
 180{
 181        double tmp = (double)rate*8;
 182
 183        if (use_iec) {
 184                if (tmp >= 1000*1024*1024)
 185                        snprintf(buf, len, "%.0fMibit", tmp/(1024*1024));
 186                else if (tmp >= 1000*1024)
 187                        snprintf(buf, len, "%.0fKibit", tmp/1024);
 188                else
 189                        snprintf(buf, len, "%.0fbit", tmp);
 190        } else {
 191                if (tmp >= 1000*1000000)
 192                        snprintf(buf, len, "%.0fMbit", tmp/1000000);
 193                else if (tmp >= 1000*1000)
 194                        snprintf(buf, len, "%.0fKbit", tmp/1000);
 195                else
 196                        snprintf(buf, len, "%.0fbit",  tmp);
 197        }
 198}
 199
 200#if 0
 201/* This is "pfifo_fast".  */
 202static int prio_parse_opt(int argc, char **argv, struct nlmsghdr *n)
 203{
 204        return 0;
 205}
 206#endif
 207static int prio_print_opt(struct rtattr *opt)
 208{
 209        int i;
 210        struct tc_prio_qopt *qopt;
 211        struct rtattr *tb[TCA_PRIO_MAX+1];
 212
 213        if (opt == NULL)
 214                return 0;
 215        parse_rtattr_nested_compat(tb, TCA_PRIO_MAX, opt, qopt, sizeof(*qopt));
 216        if (tb == NULL)
 217                return 0;
 218        printf("bands %u priomap ", qopt->bands);
 219        for (i=0; i<=TC_PRIO_MAX; i++)
 220                printf(" %d", qopt->priomap[i]);
 221
 222        if (tb[TCA_PRIO_MQ])
 223                printf(" multiqueue: o%s ",
 224                    *(unsigned char *)RTA_DATA(tb[TCA_PRIO_MQ]) ? "n" : "ff");
 225
 226        return 0;
 227}
 228
 229#if 0
 230/* Class Based Queue */
 231static int cbq_parse_opt(int argc, char **argv, struct nlmsghdr *n)
 232{
 233        return 0;
 234}
 235#endif
 236static int cbq_print_opt(struct rtattr *opt)
 237{
 238        struct rtattr *tb[TCA_CBQ_MAX+1];
 239        struct tc_ratespec *r = NULL;
 240        struct tc_cbq_lssopt *lss = NULL;
 241        struct tc_cbq_wrropt *wrr = NULL;
 242        struct tc_cbq_fopt *fopt = NULL;
 243        struct tc_cbq_ovl *ovl = NULL;
 244        const char *const error = "CBQ: too short %s opt";
 245        char buf[64];
 246
 247        if (opt == NULL)
 248                goto done;
 249        parse_rtattr_nested(tb, TCA_CBQ_MAX, opt);
 250
 251        if (tb[TCA_CBQ_RATE]) {
 252                if (RTA_PAYLOAD(tb[TCA_CBQ_RATE]) < sizeof(*r))
 253                        bb_error_msg(error, "rate");
 254                else
 255                        r = RTA_DATA(tb[TCA_CBQ_RATE]);
 256        }
 257        if (tb[TCA_CBQ_LSSOPT]) {
 258                if (RTA_PAYLOAD(tb[TCA_CBQ_LSSOPT]) < sizeof(*lss))
 259                        bb_error_msg(error, "lss");
 260                else
 261                        lss = RTA_DATA(tb[TCA_CBQ_LSSOPT]);
 262        }
 263        if (tb[TCA_CBQ_WRROPT]) {
 264                if (RTA_PAYLOAD(tb[TCA_CBQ_WRROPT]) < sizeof(*wrr))
 265                        bb_error_msg(error, "wrr");
 266                else
 267                        wrr = RTA_DATA(tb[TCA_CBQ_WRROPT]);
 268        }
 269        if (tb[TCA_CBQ_FOPT]) {
 270                if (RTA_PAYLOAD(tb[TCA_CBQ_FOPT]) < sizeof(*fopt))
 271                        bb_error_msg(error, "fopt");
 272                else
 273                        fopt = RTA_DATA(tb[TCA_CBQ_FOPT]);
 274        }
 275        if (tb[TCA_CBQ_OVL_STRATEGY]) {
 276                if (RTA_PAYLOAD(tb[TCA_CBQ_OVL_STRATEGY]) < sizeof(*ovl))
 277                        bb_error_msg("CBQ: too short overlimit strategy %u/%u",
 278                                (unsigned) RTA_PAYLOAD(tb[TCA_CBQ_OVL_STRATEGY]),
 279                                (unsigned) sizeof(*ovl));
 280                else
 281                        ovl = RTA_DATA(tb[TCA_CBQ_OVL_STRATEGY]);
 282        }
 283
 284        if (r) {
 285                print_rate(buf, sizeof(buf), r->rate);
 286                printf("rate %s ", buf);
 287                if (show_details) {
 288                        printf("cell %ub ", 1<<r->cell_log);
 289                        if (r->mpu)
 290                                printf("mpu %ub ", r->mpu);
 291                        if (r->overhead)
 292                                printf("overhead %ub ", r->overhead);
 293                }
 294        }
 295        if (lss && lss->flags) {
 296                bool comma = false;
 297                bb_putchar('(');
 298                if (lss->flags&TCF_CBQ_LSS_BOUNDED) {
 299                        printf("bounded");
 300                        comma = true;
 301                }
 302                if (lss->flags&TCF_CBQ_LSS_ISOLATED) {
 303                        if (comma)
 304                                bb_putchar(',');
 305                        printf("isolated");
 306                }
 307                printf(") ");
 308        }
 309        if (wrr) {
 310                if (wrr->priority != TC_CBQ_MAXPRIO)
 311                        printf("prio %u", wrr->priority);
 312                else
 313                        printf("prio no-transmit");
 314                if (show_details) {
 315                        printf("/%u ", wrr->cpriority);
 316                        if (wrr->weight != 1) {
 317                                print_rate(buf, sizeof(buf), wrr->weight);
 318                                printf("weight %s ", buf);
 319                        }
 320                        if (wrr->allot)
 321                                printf("allot %ub ", wrr->allot);
 322                }
 323        }
 324 done:
 325        return 0;
 326}
 327
 328static FAST_FUNC int print_qdisc(
 329                const struct sockaddr_nl *who UNUSED_PARAM,
 330                struct nlmsghdr *hdr,
 331                void *arg UNUSED_PARAM)
 332{
 333        struct tcmsg *msg = NLMSG_DATA(hdr);
 334        int len = hdr->nlmsg_len;
 335        struct rtattr * tb[TCA_MAX+1];
 336        char *name;
 337
 338        if (hdr->nlmsg_type != RTM_NEWQDISC && hdr->nlmsg_type != RTM_DELQDISC) {
 339                /* bb_error_msg("not a qdisc"); */
 340                return 0; /* ??? mimic upstream; should perhaps return -1 */
 341        }
 342        len -= NLMSG_LENGTH(sizeof(*msg));
 343        if (len < 0) {
 344                /* bb_error_msg("wrong len %d", len); */
 345                return -1;
 346        }
 347        /* not the desired interface? */
 348        if (filter_ifindex && filter_ifindex != msg->tcm_ifindex)
 349                return 0;
 350        memset (tb, 0, sizeof(tb));
 351        parse_rtattr(tb, TCA_MAX, TCA_RTA(msg), len);
 352        if (tb[TCA_KIND] == NULL) {
 353                /* bb_error_msg("%s: NULL kind", "qdisc"); */
 354                return -1;
 355        }
 356        if (hdr->nlmsg_type == RTM_DELQDISC)
 357                printf("deleted ");
 358        name = (char*)RTA_DATA(tb[TCA_KIND]);
 359        printf("qdisc %s %x: ", name, msg->tcm_handle>>16);
 360        if (filter_ifindex == 0)
 361                printf("dev %s ", ll_index_to_name(msg->tcm_ifindex));
 362        if (msg->tcm_parent == TC_H_ROOT)
 363                printf("root ");
 364        else if (msg->tcm_parent) {
 365                char *classid = print_tc_classid(msg->tcm_parent);
 366                printf("parent %s ", classid);
 367                if (ENABLE_FEATURE_CLEAN_UP)
 368                        free(classid);
 369        }
 370        if (msg->tcm_info != 1)
 371                printf("refcnt %d ", msg->tcm_info);
 372        if (tb[TCA_OPTIONS]) {
 373                static const char _q_[] ALIGN1 = "pfifo_fast\0""cbq\0";
 374                int qqq = index_in_strings(_q_, name);
 375                if (qqq == 0) { /* pfifo_fast aka prio */
 376                        prio_print_opt(tb[TCA_OPTIONS]);
 377                } else if (qqq == 1) { /* class based queuing */
 378                        cbq_print_opt(tb[TCA_OPTIONS]);
 379                } else
 380                        bb_error_msg("unknown %s", name);
 381        }
 382        bb_putchar('\n');
 383        return 0;
 384}
 385
 386static FAST_FUNC int print_class(
 387                const struct sockaddr_nl *who UNUSED_PARAM,
 388                struct nlmsghdr *hdr,
 389                void *arg UNUSED_PARAM)
 390{
 391        struct tcmsg *msg = NLMSG_DATA(hdr);
 392        int len = hdr->nlmsg_len;
 393        struct rtattr * tb[TCA_MAX+1];
 394        char *name, *classid;
 395
 396        /*XXX Eventually factor out common code */
 397
 398        if (hdr->nlmsg_type != RTM_NEWTCLASS && hdr->nlmsg_type != RTM_DELTCLASS) {
 399                /* bb_error_msg("not a class"); */
 400                return 0; /* ??? mimic upstream; should perhaps return -1 */
 401        }
 402        len -= NLMSG_LENGTH(sizeof(*msg));
 403        if (len < 0) {
 404                /* bb_error_msg("wrong len %d", len); */
 405                return -1;
 406        }
 407        /* not the desired interface? */
 408        if (filter_qdisc && TC_H_MAJ(msg->tcm_handle^filter_qdisc))
 409                return 0;
 410        memset (tb, 0, sizeof(tb));
 411        parse_rtattr(tb, TCA_MAX, TCA_RTA(msg), len);
 412        if (tb[TCA_KIND] == NULL) {
 413                /* bb_error_msg("%s: NULL kind", "class"); */
 414                return -1;
 415        }
 416        if (hdr->nlmsg_type == RTM_DELTCLASS)
 417                printf("deleted ");
 418
 419        name = (char*)RTA_DATA(tb[TCA_KIND]);
 420        classid = !msg->tcm_handle ? NULL : print_tc_classid(
 421                                filter_qdisc ? TC_H_MIN(msg->tcm_parent) : msg->tcm_parent);
 422        printf ("class %s %s", name, classid);
 423        if (ENABLE_FEATURE_CLEAN_UP)
 424                free(classid);
 425
 426        if (filter_ifindex == 0)
 427                printf("dev %s ", ll_index_to_name(msg->tcm_ifindex));
 428        if (msg->tcm_parent == TC_H_ROOT)
 429                printf("root ");
 430        else if (msg->tcm_parent) {
 431                classid = print_tc_classid(filter_qdisc ?
 432                                TC_H_MIN(msg->tcm_parent) : msg->tcm_parent);
 433                printf("parent %s ", classid);
 434                if (ENABLE_FEATURE_CLEAN_UP)
 435                        free(classid);
 436        }
 437        if (msg->tcm_info)
 438                printf("leaf %x ", msg->tcm_info >> 16);
 439        /* Do that get_qdisc_kind(RTA_DATA(tb[TCA_KIND])).  */
 440        if (tb[TCA_OPTIONS]) {
 441                static const char _q_[] ALIGN1 = "pfifo_fast\0""cbq\0";
 442                int qqq = index_in_strings(_q_, name);
 443                if (qqq == 0) { /* pfifo_fast aka prio */
 444                        /* nothing. */ /*prio_print_opt(tb[TCA_OPTIONS]);*/
 445                } else if (qqq == 1) { /* class based queuing */
 446                        /* cbq_print_copt() is identical to cbq_print_opt(). */
 447                        cbq_print_opt(tb[TCA_OPTIONS]);
 448                } else
 449                        bb_error_msg("unknown %s", name);
 450        }
 451        bb_putchar('\n');
 452
 453        return 0;
 454}
 455
 456static FAST_FUNC int print_filter(
 457                const struct sockaddr_nl *who UNUSED_PARAM,
 458                struct nlmsghdr *hdr UNUSED_PARAM,
 459                void *arg UNUSED_PARAM)
 460{
 461        return 0;
 462}
 463
 464int tc_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 465int tc_main(int argc UNUSED_PARAM, char **argv)
 466{
 467        static const char objects[] ALIGN1 =
 468                "qdisc\0""class\0""filter\0"
 469                ;
 470        enum { OBJ_qdisc = 0, OBJ_class, OBJ_filter };
 471        static const char commands[] ALIGN1 =
 472                "add\0""delete\0""change\0"
 473                "link\0" /* only qdisc */
 474                "replace\0"
 475                "show\0""list\0"
 476                ;
 477        enum {
 478                CMD_add = 0, CMD_del, CMD_change,
 479                CMD_link,
 480                CMD_replace,
 481                CMD_show
 482        };
 483        static const char args[] ALIGN1 =
 484                "dev\0" /* qdisc, class, filter */
 485                "root\0" /* class, filter */
 486                "parent\0" /* class, filter */
 487                "qdisc\0" /* class */
 488                "handle\0" /* change: qdisc, class(classid) list: filter */
 489                "classid\0" /* change: for class use "handle" */
 490                "preference\0""priority\0""protocol\0" /* filter */
 491                ;
 492        enum {
 493                ARG_dev = 0,
 494                ARG_root,
 495                ARG_parent,
 496                ARG_qdisc,
 497                ARG_handle,
 498                ARG_classid,
 499                ARG_pref, ARG_prio, ARG_proto
 500        };
 501        struct rtnl_handle rth;
 502        struct tcmsg msg;
 503        int ret, obj, cmd, arg;
 504        char *dev = NULL;
 505
 506        INIT_G();
 507
 508        if (!*++argv)
 509                bb_show_usage();
 510        xrtnl_open(&rth);
 511        ret = EXIT_SUCCESS;
 512
 513        obj = index_in_substrings(objects, *argv++);
 514
 515        if (obj < 0)
 516                bb_show_usage();
 517        if (!*argv)
 518                cmd = CMD_show; /* list is the default */
 519        else {
 520                cmd = index_in_substrings(commands, *argv);
 521                if (cmd < 0)
 522                        invarg_1_to_2(*argv, argv[-1]);
 523                argv++;
 524        }
 525
 526        memset(&msg, 0, sizeof(msg));
 527        if (AF_UNSPEC != 0)
 528                msg.tcm_family = AF_UNSPEC;
 529        ll_init_map(&rth);
 530
 531        while (*argv) {
 532                arg = index_in_substrings(args, *argv);
 533                if (arg == ARG_dev) {
 534                        NEXT_ARG();
 535                        if (dev)
 536                                duparg2("dev", *argv);
 537                        dev = *argv++;
 538                        msg.tcm_ifindex = xll_name_to_index(dev);
 539                        if (cmd >= CMD_show)
 540                                filter_ifindex = msg.tcm_ifindex;
 541                } else
 542                if ((arg == ARG_qdisc && obj == OBJ_class && cmd >= CMD_show)
 543                 || (arg == ARG_handle && obj == OBJ_qdisc && cmd == CMD_change)
 544                ) {
 545                        NEXT_ARG();
 546                        /* We don't care about duparg2("qdisc handle",*argv) for now */
 547                        if (get_qdisc_handle(&filter_qdisc, *argv))
 548                                invarg_1_to_2(*argv, "qdisc");
 549                } else
 550                if (obj != OBJ_qdisc
 551                 && (arg == ARG_root
 552                    || arg == ARG_parent
 553                    || (obj == OBJ_filter && arg >= ARG_pref)
 554                    )
 555                ) {
 556                        /* nothing */
 557                } else {
 558                        invarg_1_to_2(*argv, "command");
 559                }
 560                NEXT_ARG();
 561                if (arg == ARG_root) {
 562                        if (msg.tcm_parent)
 563                                duparg("parent", *argv);
 564                        msg.tcm_parent = TC_H_ROOT;
 565                        if (obj == OBJ_filter)
 566                                filter_parent = TC_H_ROOT;
 567                } else
 568                if (arg == ARG_parent) {
 569                        uint32_t handle;
 570                        if (msg.tcm_parent)
 571                                duparg(*argv, "parent");
 572                        if (get_tc_classid(&handle, *argv))
 573                                invarg_1_to_2(*argv, "parent");
 574                        msg.tcm_parent = handle;
 575                        if (obj == OBJ_filter)
 576                                filter_parent = handle;
 577                } else
 578                if (arg == ARG_handle) { /* filter::list */
 579                        if (msg.tcm_handle)
 580                                duparg(*argv, "handle");
 581                        /* reject LONG_MIN || LONG_MAX */
 582                        /* TODO: for fw
 583                        slash = strchr(handle, '/');
 584                        if (slash != NULL)
 585                                *slash = '\0';
 586                         */
 587                        msg.tcm_handle = get_u32(*argv, "handle");
 588                        /* if (slash) {if (get_u32(uint32_t &mask, slash+1, NULL)) inv mask; addattr32(n, MAX_MSG, TCA_FW_MASK, mask); */
 589                } else
 590                if (arg == ARG_classid
 591                 && obj == OBJ_class
 592                 && cmd == CMD_change
 593                ) {
 594                        /* TODO */
 595                } else
 596                if (arg == ARG_pref || arg == ARG_prio) { /* filter::list */
 597                        if (filter_prio)
 598                                duparg(*argv, "priority");
 599                        filter_prio = get_u32(*argv, "priority");
 600                } else
 601                if (arg == ARG_proto) { /* filter::list */
 602                        uint16_t tmp;
 603                        if (filter_proto)
 604                                duparg(*argv, "protocol");
 605                        if (ll_proto_a2n(&tmp, *argv))
 606                                invarg_1_to_2(*argv, "protocol");
 607                        filter_proto = tmp;
 608                }
 609        }
 610
 611        if (cmd >= CMD_show) { /* show or list */
 612                if (obj == OBJ_filter)
 613                        msg.tcm_info = TC_H_MAKE(filter_prio<<16, filter_proto);
 614                if (rtnl_dump_request(&rth, obj == OBJ_qdisc ? RTM_GETQDISC :
 615                                                obj == OBJ_class ? RTM_GETTCLASS : RTM_GETTFILTER,
 616                                                &msg, sizeof(msg)) < 0)
 617                        bb_simple_perror_msg_and_die("can't send dump request");
 618
 619                xrtnl_dump_filter(&rth, obj == OBJ_qdisc ? print_qdisc :
 620                                                obj == OBJ_class ? print_class : print_filter,
 621                                                NULL);
 622        }
 623        if (ENABLE_FEATURE_CLEAN_UP) {
 624                rtnl_close(&rth);
 625        }
 626        return ret;
 627}
 628