tools/iptables-test.c

   1 /*
   2  *  Connection Manager
   3  *
   4  *  Copyright (C) 2007-2010  Intel Corporation. All rights reserved.
   5  *
   6  *  This program is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License version 2 as
   8  *  published by the Free Software Foundation.
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with this program; if not, write to the Free Software
  17  *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  18  *
  19  */
  20
  21 #include <getopt.h>
  22 #include <stdlib.h>
  23 #include <stdio.h>
  24 #include <string.h>
  25 #include <unistd.h>
  26 #include <sys/errno.h>
  27 #include <sys/socket.h>
  28 #include <xtables.h>
  29
  30 #include <linux/netfilter_ipv4/ip_tables.h>
  31
  32 #include <glib.h>
  33
  34 static const char *hooknames[] = {
  35         [NF_IP_PRE_ROUTING]     = "PREROUTING",
  36         [NF_IP_LOCAL_IN]        = "INPUT",
  37         [NF_IP_FORWARD]         = "FORWARD",
  38         [NF_IP_LOCAL_OUT]       = "OUTPUT",
  39         [NF_IP_POST_ROUTING]    = "POSTROUTING",
  40 };
  41
  42 #define LABEL_ACCEPT  "ACCEPT"
  43 #define LABEL_DROP    "DROP"
  44 #define LABEL_QUEUE   "QUEUE"
  45 #define LABEL_RETURN  "RETURN"
  46
  47 /* fn returns 0 to continue iteration */
  48 #define _XT_ENTRY_ITERATE_CONTINUE(type, entries, size, n, fn, args...) \
  49 ({                                                              \
  50         unsigned int __i;                                       \
  51         int __n;                                                \
  52         int __ret = 0;                                          \
  53         type *__entry;                                          \
  54                                                                 \
  55         for (__i = 0, __n = 0; __i < (size);                    \
  56              __i += __entry->next_offset, __n++) {              \
  57                 __entry = (void *)(entries) + __i;              \
  58                 if (__n < n)                                    \
  59                         continue;                               \
  60                                                                 \
  61                 __ret = fn(__entry,  ## args);                  \
  62                 if (__ret != 0)                                 \
  63                         break;                                  \
  64         }                                                       \
  65         __ret;                                                  \
  66 })
  67
  68 /* fn returns 0 to continue iteration */
  69 #define _XT_ENTRY_ITERATE(type, entries, size, fn, args...) \
  70         _XT_ENTRY_ITERATE_CONTINUE(type, entries, size, 0, fn, args)
  71
  72 #define ENTRY_ITERATE(entries, size, fn, args...) \
  73         _XT_ENTRY_ITERATE(struct ipt_entry, entries, size, fn, ## args)
  74
  75 #define MIN_ALIGN (__alignof__(struct ipt_entry))
  76
  77 #define ALIGN(s) (((s) + ((MIN_ALIGN)-1)) & ~((MIN_ALIGN)-1))
  78
  79 struct ipt_error_target {
  80         struct xt_entry_target t;
  81         char error[IPT_TABLE_MAXNAMELEN];
  82 };
  83
  84 struct connman_iptables_entry {
  85         int builtin;
  86         int std_target;
  87         int jump_offset;
  88
  89         struct ipt_entry *entry;
  90 };
  91
  92 struct connman_iptables {
  93         int ipt_sock;
  94
  95         struct ipt_getinfo *info;
  96         struct ipt_get_entries *blob_entries;
  97
  98         unsigned int num_entries;
  99         unsigned int old_entries;
 100         unsigned int size;
 101
 102         GList *entries;
 103 };
 104
 105
 106 static struct ipt_entry *get_entry(struct connman_iptables *table,
 107                                         unsigned int offset)
 108 {
 109         return (struct ipt_entry *)((char *)table->blob_entries->entrytable +
 110                                                                         offset);
 111 }
 112
 113 static int is_hook_entry(struct connman_iptables *table,
 114                                 struct ipt_entry *entry)
 115 {
 116         unsigned int i;
 117
 118         for (i = 0; i < NF_INET_NUMHOOKS; i++) {
 119                 if ((table->info->valid_hooks & (1 << i))
 120                 && get_entry(table, table->info->hook_entry[i]) == entry)
 121                         return i;
 122         }
 123
 124         return -1;
 125 }
 126
 127 static unsigned long entry_to_offset(struct connman_iptables *table,
 128                                         struct ipt_entry *entry)
 129 {
 130         return (void *)entry - (void *)table->blob_entries->entrytable;
 131 }
 132
 133 static int target_to_verdict(char *target_name)
 134 {
 135         if (!strcmp(target_name, LABEL_ACCEPT))
 136                 return -NF_ACCEPT - 1;
 137
 138         if (!strcmp(target_name, LABEL_DROP))
 139                 return -NF_DROP - 1;
 140
 141         if (!strcmp(target_name, LABEL_QUEUE))
 142                 return -NF_QUEUE - 1;
 143
 144         if (!strcmp(target_name, LABEL_RETURN))
 145                 return XT_RETURN;
 146
 147         return 0;
 148 }
 149
 150 static gboolean is_builtin_target(char *target_name)
 151 {
 152         if (!strcmp(target_name, LABEL_ACCEPT) ||
 153                 !strcmp(target_name, LABEL_DROP) ||
 154                 !strcmp(target_name, LABEL_QUEUE) ||
 155                 !strcmp(target_name, LABEL_RETURN))
 156                 return TRUE;
 157
 158         return FALSE;
 159 }
 160
 161 static gboolean is_chain(struct connman_iptables *table,
 162                                 struct connman_iptables_entry *e)
 163 {
 164         int builtin;
 165         struct ipt_entry *entry;
 166         struct xt_entry_target *target;
 167
 168         entry = e->entry;
 169         builtin = is_hook_entry(table, entry);
 170         if (builtin >= 0)
 171                 return TRUE;
 172
 173         target = ipt_get_target(entry);
 174         if (!strcmp(target->u.user.name, IPT_ERROR_TARGET))
 175                 return TRUE;
 176
 177         return FALSE;
 178 }
 179
 180 static GList *find_chain_tail(struct connman_iptables *table,
 181                                 char *chain_name)
 182 {
 183         GList *chain_head, *list;
 184         struct connman_iptables_entry *head, *tail;
 185         struct ipt_entry *entry;
 186         struct xt_entry_target *target;
 187         int builtin;
 188
 189         /* First we look for the head */
 190         for (list = table->entries; list; list = list->next) {
 191                 head = list->data;
 192                 entry = head->entry;
 193
 194                 /* Buit-in chain */
 195                 builtin = is_hook_entry(table, entry);
 196                 if (builtin >= 0 && !strcmp(hooknames[builtin], chain_name))
 197                         break;
 198
 199                 /* User defined chain */
 200                 target = ipt_get_target(entry);
 201                 if (!strcmp(target->u.user.name, IPT_ERROR_TARGET) &&
 202                     !strcmp((char *)target->data, chain_name))
 203                         break;
 204         }
 205
 206         if (list == NULL)
 207                 return NULL;
 208
 209         chain_head = list;
 210
 211         /* Then we look for the next chain */
 212         for (list = chain_head->next; list; list = list->next) {
 213                 tail = list->data;
 214                 entry = tail->entry;
 215
 216                 if (is_chain(table, tail))
 217                         return list;
 218         }
 219
 220         /* Nothing found, we return the table end */
 221         return g_list_last(table->entries);
 222 }
 223
 224 static int connman_add_entry(struct connman_iptables *table,
 225                                 struct ipt_entry *entry, GList *before)
 226 {
 227         struct connman_iptables_entry *e;
 228
 229         if (table == NULL)
 230                 return -1;
 231
 232         e = g_try_malloc0(sizeof(struct connman_iptables_entry));
 233         if (e == NULL)
 234                 return -1;
 235
 236         e->entry = entry;
 237
 238         table->entries = g_list_insert_before(table->entries, before, e);
 239         table->num_entries++;
 240         table->size += entry->next_offset;
 241
 242         return 0;
 243 }
 244
 245 static int connman_iptables_add_chain(struct connman_iptables *table,
 246                                         char *name)
 247 {
 248         GList *last;
 249         struct ipt_entry *entry_head;
 250         struct ipt_entry *entry_return;
 251         struct ipt_error_target *error;
 252         struct ipt_standard_target *standard;
 253         u_int16_t entry_head_size, entry_return_size;
 254
 255         last = g_list_last(table->entries);
 256
 257         /*
 258          * An empty chain is composed of:
 259          * - A head entry, with no match and an error target.
 260          *   The error target data is the chain name.
 261          * - A tail entry, with no match and a standard target.
 262          *   The standard target verdict is XT_RETURN (return to the
 263          *   caller).
 264          */
 265
 266         /* head entry */
 267         entry_head_size = sizeof(struct ipt_entry) +
 268                                 sizeof(struct ipt_error_target);
 269         entry_head = g_try_malloc0(entry_head_size);
 270         if (entry_head == NULL)
 271                 goto err;
 272
 273         memset(entry_head, 0, entry_head_size);
 274
 275         entry_head->target_offset = sizeof(struct ipt_entry);
 276         entry_head->next_offset = entry_head_size;
 277
 278         error = (struct ipt_error_target *) entry_head->elems;
 279         strcpy(error->t.u.user.name, IPT_ERROR_TARGET);
 280         error->t.u.user.target_size = ALIGN(sizeof(struct ipt_error_target));
 281         strcpy(error->error, name);
 282
 283         if (connman_add_entry(table, entry_head, last) < 0)
 284                 goto err;
 285
 286         /* tail entry */
 287         entry_return_size = sizeof(struct ipt_entry) +
 288                                 sizeof(struct ipt_standard_target);
 289         entry_return = g_try_malloc0(entry_return_size);
 290         if (entry_return == NULL)
 291                 goto err;
 292
 293         memset(entry_return, 0, entry_return_size);
 294
 295         entry_return->target_offset = sizeof(struct ipt_entry);
 296         entry_return->next_offset = entry_return_size;
 297
 298         standard = (struct ipt_standard_target *) entry_return->elems;
 299         standard->target.u.user.target_size =
 300                                 ALIGN(sizeof(struct ipt_standard_target));
 301         standard->verdict = XT_RETURN;
 302
 303         if (connman_add_entry(table, entry_return, last) < 0)
 304                 goto err;
 305
 306         return 0;
 307
 308 err:
 309         g_free(entry_head);
 310         g_free(entry_return);
 311
 312         return -ENOMEM;
 313 }
 314
 315 static struct ipt_entry *
 316 new_builtin_rule(char *target_name, struct xtables_match *xt_m)
 317 {
 318         struct ipt_entry *new_entry;
 319         size_t match_size, target_size;
 320         struct xt_entry_match *entry_match;
 321         struct xt_standard_target *target;
 322
 323
 324         if (xt_m)
 325                 match_size = xt_m->m->u.match_size;
 326         else
 327                 match_size = 0;
 328
 329         target_size = ALIGN(sizeof(struct xt_standard_target));
 330
 331         new_entry = g_try_malloc0(sizeof(struct ipt_entry) + target_size +
 332                                                                 match_size);
 333         if (new_entry == NULL)
 334                 return NULL;
 335
 336         new_entry->target_offset = sizeof(struct ipt_entry) + match_size;
 337         new_entry->next_offset = sizeof(struct ipt_entry) + target_size +
 338                                                                 match_size;
 339
 340         if (xt_m) {
 341                 entry_match = (struct xt_entry_match *)new_entry->elems;
 342                 memcpy(entry_match, xt_m->m, match_size);
 343         }
 344
 345         target = (struct xt_standard_target *)(new_entry->elems + match_size);
 346         strcpy(target->target.u.user.name, IPT_STANDARD_TARGET);
 347         target->target.u.user.target_size =
 348                                 ALIGN(sizeof(struct ipt_standard_target));
 349         target->verdict = target_to_verdict(target_name);
 350
 351         return new_entry;
 352 }
 353
 354 static struct ipt_entry *
 355 new_custom_rule(struct xtables_target *xt_t, struct xtables_match *xt_m)
 356 {
 357         return NULL;
 358 }
 359
 360 static struct ipt_entry *
 361 new_rule(char *target_name, struct xtables_target *xt_t,
 362                 char *match_name, struct xtables_match *xt_m)
 363 {
 364         struct ipt_entry *new_entry;
 365
 366         if (is_builtin_target(target_name))
 367                 new_entry = new_builtin_rule(target_name, xt_m);
 368         else
 369                 new_entry = new_custom_rule(xt_t, xt_m);
 370
 371         return new_entry;
 372 }
 373
 374 static int
 375 connman_iptables_add_rule(struct connman_iptables *table, char *chain_name,
 376                                 char *target_name, struct xtables_target *xt_t,
 377                                 char *match_name, struct xtables_match *xt_m)
 378 {
 379         GList *chain_tail;
 380         struct ipt_entry *new_entry;
 381
 382         chain_tail = find_chain_tail(table, chain_name);
 383         if (chain_tail == NULL)
 384                 return -EINVAL;
 385
 386         new_entry = new_rule(target_name, xt_t,
 387                                 match_name, xt_m);
 388         if (new_entry == NULL)
 389                 return -EINVAL;
 390
 391         return connman_add_entry(table, new_entry, chain_tail->prev);
 392 }
 393
 394 static struct ipt_replace *
 395 connman_iptables_blob(struct connman_iptables *table)
 396 {
 397         struct ipt_replace *r;
 398         GList *list;
 399         struct connman_iptables_entry *e;
 400         unsigned char *entry_index;
 401
 402         r = g_try_malloc0(sizeof(struct ipt_replace) + table->size);
 403         if (r == NULL)
 404                 return NULL;
 405
 406         memset(r, 0, sizeof(*r) + table->size);
 407
 408         r->counters = g_try_malloc0(sizeof(struct xt_counters)
 409                                 * table->num_entries);
 410         if (r->counters == NULL) {
 411                 g_free(r);
 412                 return NULL;
 413         }
 414
 415         strcpy(r->name, table->info->name);
 416         r->num_entries = table->num_entries;
 417         r->size = table->size;
 418
 419         r->num_counters = table->old_entries;
 420         r->valid_hooks  = table->info->valid_hooks;
 421
 422         memcpy(r->hook_entry, table->info->hook_entry,
 423                                 sizeof(table->info->hook_entry));
 424         memcpy(r->underflow, table->info->underflow,
 425                                 sizeof(table->info->underflow));
 426
 427         entry_index = (unsigned char *)r->entries;
 428         for (list = table->entries; list; list = list->next) {
 429                 e = list->data;
 430
 431                 memcpy(entry_index, e->entry, e->entry->next_offset);
 432                 entry_index += e->entry->next_offset;
 433         }
 434
 435         return r;
 436 }
 437
 438 static void dump_target(struct connman_iptables *table,
 439                                 struct ipt_entry *entry)
 440
 441 {
 442         struct xtables_target *xt_t;
 443         struct xt_entry_target *target;
 444
 445         target = ipt_get_target(entry);
 446
 447         if (!strcmp(target->u.user.name, IPT_STANDARD_TARGET)) {
 448                 struct xt_standard_target *t;
 449
 450                 t = (struct xt_standard_target *)target;
 451
 452                 switch (t->verdict) {
 453                 case XT_RETURN:
 454                         printf("\ttarget RETURN\n");
 455                         break;
 456
 457                 case -NF_ACCEPT - 1:
 458                         printf("\ttarget ACCEPT\n");
 459                         break;
 460
 461                 case -NF_DROP - 1:
 462                         printf("\ttarget DROP\n");
 463                         break;
 464
 465                 case -NF_QUEUE - 1:
 466                         printf("\ttarget QUEUE\n");
 467                         break;
 468
 469                 case -NF_STOP - 1:
 470                         printf("\ttarget STOP\n");
 471                         break;
 472
 473                 default:
 474                         printf("\tJUMP @%p (0x%x)\n",
 475                                 (char*)table->blob_entries->entrytable +
 476                                 t->verdict, t->verdict);
 477                         break;
 478                 }
 479
 480                 xt_t = xtables_find_target(IPT_STANDARD_TARGET,
 481                                                 XTF_LOAD_MUST_SUCCEED);
 482
 483                 if(xt_t->print != NULL)
 484                         xt_t->print(NULL, target, 1);
 485         } else {
 486                 printf("\ttarget %s\n", target->u.user.name);
 487
 488                 xt_t = xtables_find_target(target->u.user.name, XTF_TRY_LOAD);
 489                 if (xt_t == NULL)
 490                         return;
 491
 492                 if(xt_t->print != NULL)
 493                         xt_t->print(NULL, target, 1);
 494         }
 495 }
 496
 497 static void dump_match(struct connman_iptables *table, struct ipt_entry *entry)
 498 {
 499         struct xtables_match *xt_m;
 500         struct xt_entry_match *match;
 501
 502         match = (struct xt_entry_match *) entry->elems;
 503
 504         if (!strlen(match->u.user.name))
 505                 return;
 506
 507         xt_m = xtables_find_match(match->u.user.name, XTF_TRY_LOAD, NULL);
 508         if (xt_m == NULL)
 509                 goto out;
 510
 511         if(xt_m->print != NULL) {
 512                 printf("\tmatch ");
 513                 xt_m->print(NULL, match, 1);
 514                 printf("\n");
 515
 516                 return;
 517         }
 518
 519 out:
 520         printf("\tmatch %s\n", match->u.user.name);
 521
 522 }
 523
 524 static int connman_iptables_dump_entry(struct ipt_entry *entry,
 525                                         struct connman_iptables *table)
 526 {
 527         struct xt_entry_target *target;
 528         unsigned int offset;
 529         int builtin;
 530
 531         offset = (char *)entry - (char *)table->blob_entries->entrytable;
 532         target = ipt_get_target(entry);
 533         builtin = is_hook_entry(table, entry);
 534
 535         if (entry_to_offset(table, entry) + entry->next_offset ==
 536                                         table->blob_entries->size) {
 537                 printf("End of CHAIN 0x%x\n", offset);
 538                 return 0;
 539         }
 540
 541         if (!strcmp(target->u.user.name, IPT_ERROR_TARGET)) {
 542                 printf("USER CHAIN (%s) %p  match %p  target %p  size %d\n",
 543                         target->data, entry, entry->elems,
 544                         (char *)entry + entry->target_offset,
 545                                 entry->next_offset);
 546
 547                 return 0;
 548         } else if (builtin >= 0) {
 549                 printf("CHAIN (%s) %p  match %p  target %p  size %d\n",
 550                         hooknames[builtin], entry, entry->elems,
 551                         (char *)entry + entry->target_offset,
 552                                 entry->next_offset);
 553         } else {
 554                 printf("RULE %p  match %p  target %p  size %d\n", entry,
 555                         entry->elems,
 556                         (char *)entry + entry->target_offset,
 557                                 entry->next_offset);
 558         }
 559
 560         dump_match(table, entry);
 561         dump_target(table, entry);
 562
 563         return 0;
 564 }
 565
 566 static void connman_iptables_dump(struct connman_iptables *table)
 567 {
 568         printf("%s valid_hooks=0x%08x, num_entries=%u, size=%u\n",
 569                 table->info->name,
 570                 table->info->valid_hooks, table->info->num_entries,
 571                 table->info->size);
 572
 573         ENTRY_ITERATE(table->blob_entries->entrytable,
 574                         table->blob_entries->size,
 575                         connman_iptables_dump_entry, table);
 576
 577 }
 578
 579 static int connman_iptables_get_entries(struct connman_iptables *table)
 580 {
 581         socklen_t entry_size;
 582
 583         entry_size = sizeof(struct ipt_get_entries) + table->info->size;
 584
 585         return getsockopt(table->ipt_sock, IPPROTO_IP, IPT_SO_GET_ENTRIES,
 586                                 table->blob_entries, &entry_size);
 587 }
 588
 589 static int connman_iptables_replace(struct connman_iptables *table,
 590                                         struct ipt_replace *r)
 591 {
 592         return setsockopt(table->ipt_sock, IPPROTO_IP, IPT_SO_SET_REPLACE, r,
 593                          sizeof(*r) + r->size);
 594 }
 595
 596 static void connman_iptables_cleanup(struct connman_iptables *table)
 597 {
 598         close(table->ipt_sock);
 599         g_free(table->info);
 600         g_free(table->blob_entries);
 601         g_free(table);
 602
 603         xtables_free_opts(1);
 604 }
 605
 606 static int connman_iptables_commit(struct connman_iptables *table)
 607 {
 608         struct ipt_replace *repl;
 609
 610         repl = connman_iptables_blob(table);
 611
 612         return connman_iptables_replace(table, repl);
 613 }
 614
 615 static int add_entry(struct ipt_entry *entry, struct connman_iptables *table)
 616 {
 617         return connman_add_entry(table, entry, NULL);
 618 }
 619
 620 static struct connman_iptables *connman_iptables_init(const char *table_name)
 621 {
 622         struct connman_iptables *table;
 623         socklen_t s;
 624
 625         table =  g_try_new0(struct connman_iptables, 1);
 626         if (table == NULL)
 627                 return NULL;
 628
 629         table->info =  g_try_new0(struct ipt_getinfo, 1);
 630         if (table->info == NULL)
 631                 goto err;
 632
 633         table->ipt_sock = socket(AF_INET, SOCK_RAW, IPPROTO_RAW);
 634         if (table->ipt_sock < 0)
 635                 goto err;
 636
 637         s = sizeof(*table->info);
 638         strcpy(table->info->name, table_name);
 639         if (getsockopt(table->ipt_sock, IPPROTO_IP, IPT_SO_GET_INFO,
 640                                                 table->info, &s) < 0)
 641                 goto err;
 642
 643         table->blob_entries = g_try_malloc0(sizeof(struct ipt_get_entries) +
 644                                                 table->info->size);
 645         if (table->blob_entries == NULL)
 646                 goto err;
 647
 648         strcpy(table->blob_entries->name, table_name);
 649         table->blob_entries->size = table->info->size;
 650
 651         if (connman_iptables_get_entries(table) < 0)
 652                 goto err;
 653
 654         table->num_entries = 0;
 655         table->old_entries = table->info->num_entries;
 656         table->size = 0;
 657
 658         ENTRY_ITERATE(table->blob_entries->entrytable,
 659                         table->blob_entries->size,
 660                                 add_entry, table);
 661
 662
 663         return table;
 664
 665 err:
 666
 667         connman_iptables_cleanup(table);
 668
 669         return NULL;
 670 }
 671
 672
 673 static struct option connman_iptables_opts[] = {
 674         {.name = "append",        .has_arg = 1, .val = 'A'},
 675         {.name = "list",          .has_arg = 2, .val = 'L'},
 676         {.name = "new-chain",     .has_arg = 1, .val = 'N'},
 677         {.name = "in-interface",  .has_arg = 1, .val = 'i'},
 678         {.name = "jump",          .has_arg = 1, .val = 'j'},
 679         {.name = "match",         .has_arg = 1, .val = 'm'},
 680         {.name = "out-interface", .has_arg = 1, .val = 'o'},
 681         {.name = "table",         .has_arg = 1, .val = 't'},
 682         {NULL},
 683 };
 684
 685 struct xtables_globals connman_iptables_globals = {
 686         .option_offset = 0,
 687         .opts = connman_iptables_opts,
 688         .orig_opts = connman_iptables_opts,
 689 };
 690
 691 int main(int argc, char *argv[])
 692 {
 693         struct connman_iptables *table;
 694         struct xtables_match *xt_m;
 695         struct xtables_target *xt_t;
 696         char *table_name, *chain, *new_chain, *match_name, *target_name;
 697         int c;
 698         size_t size;
 699         gboolean dump, invert;
 700
 701         xtables_init_all(&connman_iptables_globals, NFPROTO_IPV4);
 702
 703         dump = FALSE;
 704         invert = FALSE;
 705         table_name = chain = new_chain = match_name = target_name = NULL;
 706         table = NULL;
 707         xt_m = NULL;
 708         xt_t = NULL;
 709
 710         while ((c = getopt_long(argc, argv,
 711            "-A:L::N:j:i:m:o:t:", connman_iptables_globals.opts, NULL)) != -1) {
 712                 switch (c) {
 713                 case 'A':
 714                         chain = optarg;
 715                         break;
 716
 717                 case 'L':
 718                         dump = TRUE;
 719                         break;
 720
 721                 case 'N':
 722                         new_chain = optarg;
 723                         break;
 724
 725                 case 'j':
 726                         target_name = optarg;
 727                         xt_t = xtables_find_target(target_name, XTF_TRY_LOAD);
 728
 729                         if (xt_t == NULL)
 730                                 break;
 731
 732                         size = ALIGN(sizeof(struct ipt_entry_target)) + xt_t->size;
 733
 734                         xt_t->t = g_try_malloc0(size);
 735                         if (xt_t->t == NULL)
 736                                 goto out;
 737                         xt_t->t->u.target_size = size;
 738                         strcpy(xt_t->t->u.user.name, target_name);
 739                         xt_t->t->u.user.revision = xt_t->revision;
 740                         if (xt_t->init != NULL)
 741                                 xt_t->init(xt_t->t);
 742                         connman_iptables_globals.opts =
 743                                 xtables_merge_options(connman_iptables_globals.opts,
 744                                                      xt_t->extra_opts,
 745                                                      &xt_t->option_offset);
 746                         if (connman_iptables_globals.opts == NULL)
 747                                 goto out;
 748
 749                         break;
 750
 751                 case 'i':
 752                         break;
 753
 754                 case 'm':
 755                         match_name = optarg;
 756
 757                         xt_m = xtables_find_match(optarg, XTF_LOAD_MUST_SUCCEED, NULL);
 758                         size = ALIGN(sizeof(struct ipt_entry_match)) + xt_m->size;
 759                         xt_m->m = g_try_malloc0(size);
 760                         if (xt_m == NULL)
 761                                 goto out;
 762                         xt_m->m->u.match_size = size;
 763                         strcpy(xt_m->m->u.user.name, xt_m->name);
 764                         xt_m->m->u.user.revision = xt_m->revision;
 765                         if (xt_m->init != NULL)
 766                                 xt_m->init(xt_m->m);
 767                         if (xt_m != xt_m->next) {
 768                                 connman_iptables_globals.opts =
 769                                         xtables_merge_options(connman_iptables_globals.opts,
 770                                                 xt_m->extra_opts,
 771                                                 &xt_m->option_offset);
 772                                 if (connman_iptables_globals.opts == NULL)
 773                                         goto out;
 774                         }
 775
 776                         break;
 777
 778                 case 'o':
 779                         break;
 780
 781                 case 't':
 782                         table_name = optarg;
 783                         break;
 784
 785                 case 1:
 786                         if (optarg[0] == '!' && optarg[1] == '\0') {
 787                                 if (invert)
 788                                         printf("Consecutive ! not allowed\n");
 789
 790                                 invert = TRUE;
 791                                 optarg[0] = '\0';
 792                                 continue;
 793                         }
 794
 795                         printf("Invalid option\n");
 796
 797                         return -1;
 798
 799                 default:
 800                         if (xt_t == NULL || xt_t->parse == NULL ||
 801                             !xt_t->parse(c - xt_t->option_offset, argv, invert,
 802                                         &xt_t->tflags, NULL, &xt_t->t)) {
 803                                 if (xt_m == NULL || xt_m->parse == NULL)
 804                                         break;
 805
 806                                 xt_m->parse(c - xt_m->option_offset, argv,
 807                                         invert, &xt_m->mflags, NULL, &xt_m->m);
 808                         }
 809
 810                         break;
 811                 }
 812         }
 813
 814         if (table_name == NULL)
 815                 table_name = "filter";
 816
 817         table = connman_iptables_init(table_name);
 818         if (table == NULL)
 819                 return -1;
 820
 821         if (dump) {
 822                 connman_iptables_dump(table);
 823
 824                 return 0;
 825         }
 826
 827         if (chain && new_chain)
 828                 return -1;
 829
 830         if (new_chain) {
 831                 printf("New chain %s\n", new_chain);
 832
 833                 connman_iptables_add_chain(table, new_chain);
 834
 835                 goto commit;
 836         }
 837
 838         if (chain) {
 839                 if (target_name == NULL)
 840                         return -1;
 841
 842                 printf("Adding %s to %s (match %s)\n", target_name, chain, match_name);
 843
 844                 connman_iptables_add_rule(table, chain, target_name, xt_t,
 845                                         match_name, xt_m);
 846
 847                 goto commit;
 848         }
 849
 850 commit:
 851
 852         connman_iptables_commit(table);
 853
 854 out:
 855         connman_iptables_cleanup(table);
 856
 857         if (xt_t)
 858                 g_free(xt_t->t);
 859
 860         if (xt_m)
 861                 g_free(xt_m->m);
 862
 863         return 0;
 864 }