tc/m_pedit.c

   1 /*
   2  * m_pedit.c            generic packet editor actions module
   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  *      1) Big endian broken in some spots
  13  *      2) A lot of this stuff was added on the fly; get a big double-double
  14  *      and clean it up at some point.
  15  *
  16  */
  17
  18 #include <stdio.h>
  19 #include <stdlib.h>
  20 #include <unistd.h>
  21 #include <syslog.h>
  22 #include <fcntl.h>
  23 #include <sys/socket.h>
  24 #include <netinet/in.h>
  25 #include <arpa/inet.h>
  26 #include <string.h>
  27 #include <dlfcn.h>
  28 #include "utils.h"
  29 #include "tc_util.h"
  30 #include "m_pedit.h"
  31 #include "rt_names.h"
  32
  33 static struct m_pedit_util *pedit_list;
  34 static int pedit_debug;
  35
  36 static void explain(void)
  37 {
  38         fprintf(stderr, "Usage: ... pedit munge [ex] <MUNGE> [CONTROL]\n");
  39         fprintf(stderr,
  40                 "Where: MUNGE := <RAW>|<LAYERED>\n"
  41                 "\t<RAW>:= <OFFSETC>[ATC]<CMD>\n \t\tOFFSETC:= offset <offval> <u8|u16|u32>\n"
  42                 "\t\tATC:= at <atval> offmask <maskval> shift <shiftval>\n"
  43                 "\t\tNOTE: offval is byte offset, must be multiple of 4\n"
  44                 "\t\tNOTE: maskval is a 32 bit hex number\n \t\tNOTE: shiftval is a shift value\n"
  45                 "\t\tCMD:= clear | invert | set <setval>| add <addval> | retain\n"
  46                 "\t<LAYERED>:= ip <ipdata> | ip6 <ip6data>\n"
  47                 " \t\t| udp <udpdata> | tcp <tcpdata> | icmp <icmpdata>\n"
  48                 "\tCONTROL:= reclassify | pipe | drop | continue | pass\n"
  49                 "\tNOTE: if 'ex' is set, extended functionality will be supported (kernel >= 4.11)\n"
  50                 "For Example usage look at the examples directory\n");
  51
  52 }
  53
  54 static void usage(void)
  55 {
  56         explain();
  57         exit(-1);
  58 }
  59
  60 static int pedit_parse_nopopt(int *argc_p, char ***argv_p,
  61                               struct m_pedit_sel *sel,
  62                               struct m_pedit_key *tkey)
  63 {
  64         int argc = *argc_p;
  65         char **argv = *argv_p;
  66
  67         if (argc) {
  68                 fprintf(stderr,
  69                         "Unknown action  hence option \"%s\" is unparsable\n",
  70                         *argv);
  71                 return -1;
  72         }
  73
  74         return 0;
  75
  76 }
  77
  78 static struct m_pedit_util *get_pedit_kind(const char *str)
  79 {
  80         static void *pBODY;
  81         void *dlh;
  82         char buf[256];
  83         struct m_pedit_util *p;
  84
  85         for (p = pedit_list; p; p = p->next) {
  86                 if (strcmp(p->id, str) == 0)
  87                         return p;
  88         }
  89
  90         snprintf(buf, sizeof(buf), "p_%s.so", str);
  91         dlh = dlopen(buf, RTLD_LAZY);
  92         if (dlh == NULL) {
  93                 dlh = pBODY;
  94                 if (dlh == NULL) {
  95                         dlh = pBODY = dlopen(NULL, RTLD_LAZY);
  96                         if (dlh == NULL)
  97                                 goto noexist;
  98                 }
  99         }
 100
 101         snprintf(buf, sizeof(buf), "p_pedit_%s", str);
 102         p = dlsym(dlh, buf);
 103         if (p == NULL)
 104                 goto noexist;
 105
 106 reg:
 107         p->next = pedit_list;
 108         pedit_list = p;
 109         return p;
 110
 111 noexist:
 112         p = calloc(1, sizeof(*p));
 113         if (p) {
 114                 strncpy(p->id, str, sizeof(p->id) - 1);
 115                 p->parse_peopt = pedit_parse_nopopt;
 116                 goto reg;
 117         }
 118         return p;
 119 }
 120
 121 int pack_key(struct m_pedit_sel *_sel, struct m_pedit_key *tkey)
 122 {
 123         struct tc_pedit_sel *sel = &_sel->sel;
 124         struct m_pedit_key_ex *keys_ex = _sel->keys_ex;
 125         int hwm = sel->nkeys;
 126
 127         if (hwm >= MAX_OFFS)
 128                 return -1;
 129
 130         if (tkey->off % 4) {
 131                 fprintf(stderr, "offsets MUST be in 32 bit boundaries\n");
 132                 return -1;
 133         }
 134
 135         sel->keys[hwm].val = tkey->val;
 136         sel->keys[hwm].mask = tkey->mask;
 137         sel->keys[hwm].off = tkey->off;
 138         sel->keys[hwm].at = tkey->at;
 139         sel->keys[hwm].offmask = tkey->offmask;
 140         sel->keys[hwm].shift = tkey->shift;
 141
 142         if (_sel->extended) {
 143                 keys_ex[hwm].htype = tkey->htype;
 144                 keys_ex[hwm].cmd = tkey->cmd;
 145         } else {
 146                 if (tkey->htype != TCA_PEDIT_KEY_EX_HDR_TYPE_NETWORK ||
 147                     tkey->cmd != TCA_PEDIT_KEY_EX_CMD_SET) {
 148                         fprintf(stderr,
 149                                 "Munge parameters not supported. Use 'munge ex'.\n");
 150                         return -1;
 151                 }
 152         }
 153
 154         sel->nkeys++;
 155         return 0;
 156 }
 157
 158 int pack_key32(__u32 retain, struct m_pedit_sel *sel,
 159                struct m_pedit_key *tkey)
 160 {
 161         if (tkey->off > (tkey->off & ~3)) {
 162                 fprintf(stderr,
 163                         "pack_key32: 32 bit offsets must begin in 32bit boundaries\n");
 164                 return -1;
 165         }
 166
 167         tkey->val = htonl(tkey->val & retain);
 168         tkey->mask = htonl(tkey->mask | ~retain);
 169         return pack_key(sel, tkey);
 170 }
 171
 172 int pack_key16(__u32 retain, struct m_pedit_sel *sel,
 173                struct m_pedit_key *tkey)
 174 {
 175         int ind, stride;
 176         __u32 m[4] = { 0x0000FFFF, 0xFF0000FF, 0xFFFF0000 };
 177
 178         if (tkey->val > 0xFFFF || tkey->mask > 0xFFFF) {
 179                 fprintf(stderr, "pack_key16 bad value\n");
 180                 return -1;
 181         }
 182
 183         ind = tkey->off & 3;
 184
 185         if (ind == 3) {
 186                 fprintf(stderr, "pack_key16 bad index value %d\n", ind);
 187                 return -1;
 188         }
 189
 190         stride = 8 * (2 - ind);
 191         tkey->val = htonl((tkey->val & retain) << stride);
 192         tkey->mask = htonl(((tkey->mask | ~retain) << stride) | m[ind]);
 193
 194         tkey->off &= ~3;
 195
 196         if (pedit_debug)
 197                 printf("pack_key16: Final val %08x mask %08x\n",
 198                        tkey->val, tkey->mask);
 199         return pack_key(sel, tkey);
 200
 201 }
 202
 203 int pack_key8(__u32 retain, struct m_pedit_sel *sel, struct m_pedit_key *tkey)
 204 {
 205         int ind, stride;
 206         __u32 m[4] = { 0x00FFFFFF, 0xFF00FFFF, 0xFFFF00FF, 0xFFFFFF00 };
 207
 208         if (tkey->val > 0xFF || tkey->mask > 0xFF) {
 209                 fprintf(stderr, "pack_key8 bad value (val %x mask %x\n",
 210                         tkey->val, tkey->mask);
 211                 return -1;
 212         }
 213
 214         ind = tkey->off & 3;
 215
 216         stride = 8 * (3 - ind);
 217         tkey->val = htonl((tkey->val & retain) << stride);
 218         tkey->mask = htonl(((tkey->mask | ~retain) << stride) | m[ind]);
 219
 220         tkey->off &= ~3;
 221
 222         if (pedit_debug)
 223                 printf("pack_key8: Final word off %d  val %08x mask %08x\n",
 224                        tkey->off, tkey->val, tkey->mask);
 225         return pack_key(sel, tkey);
 226 }
 227
 228 static int pack_mac(struct m_pedit_sel *sel, struct m_pedit_key *tkey,
 229                     __u8 *mac)
 230 {
 231         int ret = 0;
 232
 233         if (!(tkey->off & 0x3)) {
 234                 tkey->mask = 0;
 235                 tkey->val = ntohl(*((__u32 *)mac));
 236                 ret |= pack_key32(~0, sel, tkey);
 237
 238                 tkey->off += 4;
 239                 tkey->mask = 0;
 240                 tkey->val = ntohs(*((__u16 *)&mac[4]));
 241                 ret |= pack_key16(~0, sel, tkey);
 242         } else if (!(tkey->off & 0x1)) {
 243                 tkey->mask = 0;
 244                 tkey->val = ntohs(*((__u16 *)mac));
 245                 ret |= pack_key16(~0, sel, tkey);
 246
 247                 tkey->off += 4;
 248                 tkey->mask = 0;
 249                 tkey->val = ntohl(*((__u32 *)(mac + 2)));
 250                 ret |= pack_key32(~0, sel, tkey);
 251         } else {
 252                 fprintf(stderr,
 253                         "pack_mac: mac offsets must begin in 32bit or 16bit boundaries\n");
 254                 return -1;
 255         }
 256
 257         return ret;
 258 }
 259
 260 int parse_val(int *argc_p, char ***argv_p, __u32 *val, int type)
 261 {
 262         int argc = *argc_p;
 263         char **argv = *argv_p;
 264
 265         if (argc <= 0)
 266                 return -1;
 267
 268         if (type == TINT)
 269                 return get_integer((int *)val, *argv, 0);
 270
 271         if (type == TU32)
 272                 return get_u32(val, *argv, 0);
 273
 274         if (type == TIPV4) {
 275                 inet_prefix addr;
 276
 277                 if (get_prefix_1(&addr, *argv, AF_INET))
 278                         return -1;
 279
 280                 *val = addr.data[0];
 281                 return 0;
 282         }
 283
 284         if (type == TIPV6)
 285                 return -1; /* not implemented yet */
 286
 287         if (type == TMAC) {
 288 #define MAC_ALEN 6
 289                 int ret = ll_addr_a2n((char *)val, MAC_ALEN, *argv);
 290
 291                 if (ret == MAC_ALEN)
 292                         return 0;
 293         }
 294
 295         return -1;
 296 }
 297
 298 int parse_cmd(int *argc_p, char ***argv_p, __u32 len, int type, __u32 retain,
 299               struct m_pedit_sel *sel, struct m_pedit_key *tkey)
 300 {
 301         __u32 mask[4] = { 0 };
 302         __u32 val[4] = { 0 };
 303         __u32 *m = &mask[0];
 304         __u32 *v = &val[0];
 305         __u32 o = 0xFF;
 306         int res = -1;
 307         int argc = *argc_p;
 308         char **argv = *argv_p;
 309
 310         if (argc <= 0)
 311                 return -1;
 312
 313         if (pedit_debug)
 314                 printf("parse_cmd argc %d %s offset %d length %d\n",
 315                        argc, *argv, tkey->off, len);
 316
 317         if (len == 2)
 318                 o = 0xFFFF;
 319         if (len == 4)
 320                 o = 0xFFFFFFFF;
 321
 322         if (matches(*argv, "invert") == 0) {
 323                 *v = *m = o;
 324         } else if (matches(*argv, "set") == 0 ||
 325                    matches(*argv, "add") == 0) {
 326                 if (matches(*argv, "add") == 0)
 327                         tkey->cmd = TCA_PEDIT_KEY_EX_CMD_ADD;
 328
 329                 if (!sel->extended && tkey->cmd) {
 330                         fprintf(stderr,
 331                                 "Non extended mode. only 'set' command is supported\n");
 332                         return -1;
 333                 }
 334
 335                 NEXT_ARG();
 336                 if (parse_val(&argc, &argv, val, type))
 337                         return -1;
 338         } else if (matches(*argv, "preserve") == 0) {
 339                 retain = 0;
 340         } else {
 341                 if (matches(*argv, "clear") != 0)
 342                         return -1;
 343         }
 344
 345         argc--;
 346         argv++;
 347
 348         if (argc && matches(*argv, "retain") == 0) {
 349                 NEXT_ARG();
 350                 if (parse_val(&argc, &argv, &retain, TU32))
 351                         return -1;
 352                 argc--;
 353                 argv++;
 354         }
 355
 356         if (type == TMAC) {
 357                 res = pack_mac(sel, tkey, (__u8 *)val);
 358                 goto done;
 359         }
 360
 361         tkey->val = *v;
 362         tkey->mask = *m;
 363
 364         if (type == TIPV4)
 365                 tkey->val = ntohl(tkey->val);
 366
 367         if (len == 1) {
 368                 res = pack_key8(retain, sel, tkey);
 369                 goto done;
 370         }
 371         if (len == 2) {
 372                 res = pack_key16(retain, sel, tkey);
 373                 goto done;
 374         }
 375         if (len == 4) {
 376                 res = pack_key32(retain, sel, tkey);
 377                 goto done;
 378         }
 379
 380         return -1;
 381 done:
 382         if (pedit_debug)
 383                 printf("parse_cmd done argc %d %s offset %d length %d\n",
 384                        argc, *argv, tkey->off, len);
 385         *argc_p = argc;
 386         *argv_p = argv;
 387         return res;
 388
 389 }
 390
 391 int parse_offset(int *argc_p, char ***argv_p, struct m_pedit_sel *sel,
 392                  struct m_pedit_key *tkey)
 393 {
 394         int off;
 395         __u32 len, retain;
 396         int argc = *argc_p;
 397         char **argv = *argv_p;
 398         int res = -1;
 399
 400         if (argc <= 0)
 401                 return -1;
 402
 403         if (get_integer(&off, *argv, 0))
 404                 return -1;
 405         tkey->off = off;
 406
 407         argc--;
 408         argv++;
 409
 410         if (argc <= 0)
 411                 return -1;
 412
 413         if (matches(*argv, "u32") == 0) {
 414                 len = 4;
 415                 retain = 0xFFFFFFFF;
 416                 goto done;
 417         }
 418         if (matches(*argv, "u16") == 0) {
 419                 len = 2;
 420                 retain = 0xffff;
 421                 goto done;
 422         }
 423         if (matches(*argv, "u8") == 0) {
 424                 len = 1;
 425                 retain = 0xff;
 426                 goto done;
 427         }
 428
 429         return -1;
 430
 431 done:
 432
 433         NEXT_ARG();
 434
 435         /* [at <someval> offmask <maskval> shift <shiftval>] */
 436         if (matches(*argv, "at") == 0) {
 437
 438                 __u32 atv = 0, offmask = 0x0, shift = 0;
 439
 440                 NEXT_ARG();
 441                 if (get_u32(&atv, *argv, 0))
 442                         return -1;
 443                 tkey->at = atv;
 444
 445                 NEXT_ARG();
 446
 447                 if (get_u32(&offmask, *argv, 16))
 448                         return -1;
 449                 tkey->offmask = offmask;
 450
 451                 NEXT_ARG();
 452
 453                 if (get_u32(&shift, *argv, 0))
 454                         return -1;
 455                 tkey->shift = shift;
 456
 457                 NEXT_ARG();
 458         }
 459
 460         res = parse_cmd(&argc, &argv, len, TU32, retain, sel, tkey);
 461
 462         *argc_p = argc;
 463         *argv_p = argv;
 464         return res;
 465 }
 466
 467 static int parse_munge(int *argc_p, char ***argv_p, struct m_pedit_sel *sel)
 468 {
 469         struct m_pedit_key tkey = {};
 470         int argc = *argc_p;
 471         char **argv = *argv_p;
 472         int res = -1;
 473
 474         if (argc <= 0)
 475                 return -1;
 476
 477         if (matches(*argv, "offset") == 0) {
 478                 NEXT_ARG();
 479                 res = parse_offset(&argc, &argv, sel, &tkey);
 480                 goto done;
 481         } else {
 482                 char k[16];
 483                 struct m_pedit_util *p = NULL;
 484
 485                 strncpy(k, *argv, sizeof(k) - 1);
 486
 487                 if (argc > 0) {
 488                         p = get_pedit_kind(k);
 489                         if (p == NULL)
 490                                 goto bad_val;
 491                         NEXT_ARG();
 492                         res = p->parse_peopt(&argc, &argv, sel, &tkey);
 493                         if (res < 0) {
 494                                 fprintf(stderr, "bad pedit parsing\n");
 495                                 goto bad_val;
 496                         }
 497                         goto done;
 498                 }
 499         }
 500
 501 bad_val:
 502         return -1;
 503
 504 done:
 505
 506         *argc_p = argc;
 507         *argv_p = argv;
 508         return res;
 509 }
 510
 511 static int pedit_keys_ex_getattr(struct rtattr *attr,
 512                                  struct m_pedit_key_ex *keys_ex, int n)
 513 {
 514         struct rtattr *i;
 515         int rem = RTA_PAYLOAD(attr);
 516         struct rtattr *tb[TCA_PEDIT_KEY_EX_MAX + 1];
 517         struct m_pedit_key_ex *k = keys_ex;
 518
 519         for (i = RTA_DATA(attr); RTA_OK(i, rem); i = RTA_NEXT(i, rem)) {
 520                 if (!n)
 521                         return -1;
 522
 523                 if (i->rta_type != TCA_PEDIT_KEY_EX)
 524                         return -1;
 525
 526                 parse_rtattr_nested(tb, TCA_PEDIT_KEY_EX_MAX, i);
 527
 528                 k->htype = rta_getattr_u16(tb[TCA_PEDIT_KEY_EX_HTYPE]);
 529                 k->cmd = rta_getattr_u16(tb[TCA_PEDIT_KEY_EX_CMD]);
 530
 531                 k++;
 532                 n--;
 533         }
 534
 535         return !!n;
 536 }
 537
 538 static int pedit_keys_ex_addattr(struct m_pedit_sel *sel, struct nlmsghdr *n)
 539 {
 540         struct m_pedit_key_ex *k = sel->keys_ex;
 541         struct rtattr *keys_start;
 542         int i;
 543
 544         if (!sel->extended)
 545                 return 0;
 546
 547         keys_start = addattr_nest(n, MAX_MSG, TCA_PEDIT_KEYS_EX | NLA_F_NESTED);
 548
 549         for (i = 0; i < sel->sel.nkeys; i++) {
 550                 struct rtattr *key_start;
 551
 552                 key_start = addattr_nest(n, MAX_MSG,
 553                                          TCA_PEDIT_KEY_EX | NLA_F_NESTED);
 554
 555                 if (addattr16(n, MAX_MSG, TCA_PEDIT_KEY_EX_HTYPE, k->htype) ||
 556                     addattr16(n, MAX_MSG, TCA_PEDIT_KEY_EX_CMD, k->cmd)) {
 557                         return -1;
 558                 }
 559
 560                 addattr_nest_end(n, key_start);
 561
 562                 k++;
 563         }
 564
 565         addattr_nest_end(n, keys_start);
 566
 567         return 0;
 568 }
 569
 570 int parse_pedit(struct action_util *a, int *argc_p, char ***argv_p, int tca_id,
 571                 struct nlmsghdr *n)
 572 {
 573         struct m_pedit_sel sel = {};
 574
 575         int argc = *argc_p;
 576         char **argv = *argv_p;
 577         int ok = 0, iok = 0;
 578         struct rtattr *tail;
 579
 580         while (argc > 0) {
 581                 if (pedit_debug > 1)
 582                         fprintf(stderr, "while pedit (%d:%s)\n", argc, *argv);
 583                 if (matches(*argv, "pedit") == 0) {
 584                         NEXT_ARG();
 585                         ok++;
 586
 587                         if (matches(*argv, "ex") == 0) {
 588                                 if (ok > 1) {
 589                                         fprintf(stderr,
 590                                                 "'ex' must be before first 'munge'\n");
 591                                         explain();
 592                                         return -1;
 593                                 }
 594                                 sel.extended = true;
 595                                 NEXT_ARG();
 596                         }
 597
 598                         continue;
 599                 } else if (matches(*argv, "help") == 0) {
 600                         usage();
 601                 } else if (matches(*argv, "munge") == 0) {
 602                         if (!ok) {
 603                                 fprintf(stderr, "Bad pedit construct (%s)\n",
 604                                         *argv);
 605                                 explain();
 606                                 return -1;
 607                         }
 608                         NEXT_ARG();
 609
 610                         if (parse_munge(&argc, &argv, &sel)) {
 611                                 fprintf(stderr, "Bad pedit construct (%s)\n",
 612                                         *argv);
 613                                 explain();
 614                                 return -1;
 615                         }
 616                         ok++;
 617                 } else {
 618                         break;
 619                 }
 620
 621         }
 622
 623         if (!ok) {
 624                 explain();
 625                 return -1;
 626         }
 627
 628         if (argc && !action_a2n(*argv, &sel.sel.action, false))
 629                 NEXT_ARG();
 630
 631         if (argc) {
 632                 if (matches(*argv, "index") == 0) {
 633                         NEXT_ARG();
 634                         if (get_u32(&sel.sel.index, *argv, 10)) {
 635                                 fprintf(stderr, "Pedit: Illegal \"index\"\n");
 636                                 return -1;
 637                         }
 638                         argc--;
 639                         argv++;
 640                         iok++;
 641                 }
 642         }
 643
 644         tail = NLMSG_TAIL(n);
 645         addattr_l(n, MAX_MSG, tca_id, NULL, 0);
 646         if (!sel.extended) {
 647                 addattr_l(n, MAX_MSG, TCA_PEDIT_PARMS, &sel,
 648                           sizeof(sel.sel) +
 649                           sel.sel.nkeys * sizeof(struct tc_pedit_key));
 650         } else {
 651                 addattr_l(n, MAX_MSG, TCA_PEDIT_PARMS_EX, &sel,
 652                           sizeof(sel.sel) +
 653                           sel.sel.nkeys * sizeof(struct tc_pedit_key));
 654
 655                 pedit_keys_ex_addattr(&sel, n);
 656         }
 657
 658         tail->rta_len = (void *)NLMSG_TAIL(n) - (void *)tail;
 659
 660         *argc_p = argc;
 661         *argv_p = argv;
 662         return 0;
 663 }
 664
 665 const char *pedit_htype_str[] = {
 666         [TCA_PEDIT_KEY_EX_HDR_TYPE_NETWORK] = "",
 667         [TCA_PEDIT_KEY_EX_HDR_TYPE_ETH] = "eth",
 668         [TCA_PEDIT_KEY_EX_HDR_TYPE_IP4] = "ipv4",
 669         [TCA_PEDIT_KEY_EX_HDR_TYPE_IP6] = "ipv6",
 670         [TCA_PEDIT_KEY_EX_HDR_TYPE_TCP] = "tcp",
 671         [TCA_PEDIT_KEY_EX_HDR_TYPE_UDP] = "udp",
 672 };
 673
 674 static void print_pedit_location(FILE *f,
 675                                  enum pedit_header_type htype, __u32 off)
 676 {
 677         if (htype == TCA_PEDIT_KEY_EX_HDR_TYPE_NETWORK) {
 678                 fprintf(f, "%d", (unsigned int)off);
 679                 return;
 680         }
 681
 682         if (htype < ARRAY_SIZE(pedit_htype_str))
 683                 fprintf(f, "%s", pedit_htype_str[htype]);
 684         else
 685                 fprintf(f, "unknown(%d)", htype);
 686
 687         fprintf(f, "%c%d", (int)off  >= 0 ? '+' : '-', abs((int)off));
 688 }
 689
 690 int print_pedit(struct action_util *au, FILE *f, struct rtattr *arg)
 691 {
 692         struct tc_pedit_sel *sel;
 693         struct rtattr *tb[TCA_PEDIT_MAX + 1];
 694         struct m_pedit_key_ex *keys_ex = NULL;
 695
 696         if (arg == NULL)
 697                 return -1;
 698
 699         parse_rtattr_nested(tb, TCA_PEDIT_MAX, arg);
 700
 701         if (!tb[TCA_PEDIT_PARMS] && !tb[TCA_PEDIT_PARMS_EX]) {
 702                 fprintf(f, "[NULL pedit parameters]");
 703                 return -1;
 704         }
 705
 706         if (tb[TCA_PEDIT_PARMS]) {
 707                 sel = RTA_DATA(tb[TCA_PEDIT_PARMS]);
 708         } else {
 709                 int err;
 710
 711                 sel = RTA_DATA(tb[TCA_PEDIT_PARMS_EX]);
 712
 713                 if (!tb[TCA_PEDIT_KEYS_EX]) {
 714                         fprintf(f, "Netlink error\n");
 715                         return -1;
 716                 }
 717
 718                 keys_ex = calloc(sel->nkeys, sizeof(*keys_ex));
 719                 if (!keys_ex) {
 720                         fprintf(f, "Out of memory\n");
 721                         return -1;
 722                 }
 723
 724                 err = pedit_keys_ex_getattr(tb[TCA_PEDIT_KEYS_EX], keys_ex,
 725                                             sel->nkeys);
 726                 if (err) {
 727                         fprintf(f, "Netlink error\n");
 728
 729                         free(keys_ex);
 730                         return -1;
 731                 }
 732         }
 733
 734         fprintf(f, " pedit action %s keys %d\n ",
 735                 action_n2a(sel->action), sel->nkeys);
 736         fprintf(f, "\t index %u ref %d bind %d", sel->index, sel->refcnt,
 737                 sel->bindcnt);
 738
 739         if (show_stats) {
 740                 if (tb[TCA_PEDIT_TM]) {
 741                         struct tcf_t *tm = RTA_DATA(tb[TCA_PEDIT_TM]);
 742
 743                         print_tm(f, tm);
 744                 }
 745         }
 746         if (sel->nkeys) {
 747                 int i;
 748                 struct tc_pedit_key *key = sel->keys;
 749                 struct m_pedit_key_ex *key_ex = keys_ex;
 750
 751                 for (i = 0; i < sel->nkeys; i++, key++) {
 752                         enum pedit_header_type htype =
 753                                 TCA_PEDIT_KEY_EX_HDR_TYPE_NETWORK;
 754                         enum pedit_cmd cmd = TCA_PEDIT_KEY_EX_CMD_SET;
 755
 756                         if (keys_ex) {
 757                                 htype = key_ex->htype;
 758                                 cmd = key_ex->cmd;
 759
 760                                 key_ex++;
 761                         }
 762
 763                         fprintf(f, "\n\t key #%d", i);
 764
 765                         fprintf(f, "  at ");
 766
 767                         print_pedit_location(f, htype, key->off);
 768
 769                         fprintf(f, ": %s %08x mask %08x",
 770                                 cmd ? "add" : "val",
 771                                 (unsigned int)ntohl(key->val),
 772                                 (unsigned int)ntohl(key->mask));
 773                 }
 774         } else {
 775                 fprintf(f, "\npedit %x keys %d is not LEGIT", sel->index,
 776                         sel->nkeys);
 777         }
 778
 779         fprintf(f, "\n ");
 780
 781         free(keys_ex);
 782         return 0;
 783 }
 784
 785 int pedit_print_xstats(struct action_util *au, FILE *f, struct rtattr *xstats)
 786 {
 787         return 0;
 788 }
 789
 790 struct action_util pedit_action_util = {
 791         .id = "pedit",
 792         .parse_aopt = parse_pedit,
 793         .print_aopt = print_pedit,
 794 };