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 <sys/types.h>
  29 #include <arpa/inet.h>
  30 #include <xtables.h>
  31
  32 #include <linux/netfilter_ipv4/ip_tables.h>
  33
  34 #include <glib.h>
  35
  36 static const char *hooknames[] = {
  37         [NF_IP_PRE_ROUTING]     = "PREROUTING",
  38         [NF_IP_LOCAL_IN]        = "INPUT",
  39         [NF_IP_FORWARD]         = "FORWARD",
  40         [NF_IP_LOCAL_OUT]       = "OUTPUT",
  41         [NF_IP_POST_ROUTING]    = "POSTROUTING",
  42 };
  43
  44 #define LABEL_ACCEPT  "ACCEPT"
  45 #define LABEL_DROP    "DROP"
  46 #define LABEL_QUEUE   "QUEUE"
  47 #define LABEL_RETURN  "RETURN"
  48
  49 /* fn returns 0 to continue iteration */
  50 #define _XT_ENTRY_ITERATE_CONTINUE(type, entries, size, n, fn, args...) \
  51 ({                                                              \
  52         unsigned int __i;                                       \
  53         int __n;                                                \
  54         int __ret = 0;                                          \
  55         type *__entry;                                          \
  56                                                                 \
  57         for (__i = 0, __n = 0; __i < (size);                    \
  58              __i += __entry->next_offset, __n++) {              \
  59                 __entry = (void *)(entries) + __i;              \
  60                 if (__n < n)                                    \
  61                         continue;                               \
  62                                                                 \
  63                 __ret = fn(__entry,  ## args);                  \
  64                 if (__ret != 0)                                 \
  65                         break;                                  \
  66         }                                                       \
  67         __ret;                                                  \
  68 })
  69
  70 /* fn returns 0 to continue iteration */
  71 #define _XT_ENTRY_ITERATE(type, entries, size, fn, args...) \
  72         _XT_ENTRY_ITERATE_CONTINUE(type, entries, size, 0, fn, args)
  73
  74 #define ENTRY_ITERATE(entries, size, fn, args...) \
  75         _XT_ENTRY_ITERATE(struct ipt_entry, entries, size, fn, ## args)
  76
  77 #define MIN_ALIGN (__alignof__(struct ipt_entry))
  78
  79 #define ALIGN(s) (((s) + ((MIN_ALIGN)-1)) & ~((MIN_ALIGN)-1))
  80
  81 struct error_target {
  82         struct xt_entry_target t;
  83         char error[IPT_TABLE_MAXNAMELEN];
  84 };
  85
  86 struct connman_iptables_entry {
  87         int offset;
  88         int builtin;
  89
  90         struct ipt_entry *entry;
  91 };
  92
  93 struct connman_iptables {
  94         int ipt_sock;
  95
  96         struct ipt_getinfo *info;
  97         struct ipt_get_entries *blob_entries;
  98
  99         unsigned int num_entries;
 100         unsigned int old_entries;
 101         unsigned int size;
 102
 103         unsigned int underflow[NF_INET_NUMHOOKS];
 104         unsigned int hook_entry[NF_INET_NUMHOOKS];
 105
 106         GList *entries;
 107 };
 108
 109
 110 static struct ipt_entry *get_entry(struct connman_iptables *table,
 111                                         unsigned int offset)
 112 {
 113         return (struct ipt_entry *)((char *)table->blob_entries->entrytable +
 114                                                                         offset);
 115 }
 116
 117 static int is_hook_entry(struct connman_iptables *table,
 118                                 struct ipt_entry *entry)
 119 {
 120         unsigned int i;
 121
 122         for (i = 0; i < NF_INET_NUMHOOKS; i++) {
 123                 if ((table->info->valid_hooks & (1 << i))
 124                 && get_entry(table, table->info->hook_entry[i]) == entry)
 125                         return i;
 126         }
 127
 128         return -1;
 129 }
 130
 131 static unsigned long entry_to_offset(struct connman_iptables *table,
 132                                         struct ipt_entry *entry)
 133 {
 134         return (void *)entry - (void *)table->blob_entries->entrytable;
 135 }
 136
 137 static int target_to_verdict(char *target_name)
 138 {
 139         if (!strcmp(target_name, LABEL_ACCEPT))
 140                 return -NF_ACCEPT - 1;
 141
 142         if (!strcmp(target_name, LABEL_DROP))
 143                 return -NF_DROP - 1;
 144
 145         if (!strcmp(target_name, LABEL_QUEUE))
 146                 return -NF_QUEUE - 1;
 147
 148         if (!strcmp(target_name, LABEL_RETURN))
 149                 return XT_RETURN;
 150
 151         return 0;
 152 }
 153
 154 static gboolean is_builtin_target(char *target_name)
 155 {
 156         if (!strcmp(target_name, LABEL_ACCEPT) ||
 157                 !strcmp(target_name, LABEL_DROP) ||
 158                 !strcmp(target_name, LABEL_QUEUE) ||
 159                 !strcmp(target_name, LABEL_RETURN))
 160                 return TRUE;
 161
 162         return FALSE;
 163 }
 164
 165 static gboolean is_jump(struct connman_iptables_entry *e)
 166 {
 167         struct xt_entry_target *target;
 168
 169         target = ipt_get_target(e->entry);
 170
 171         if (!strcmp(target->u.user.name, IPT_STANDARD_TARGET)) {
 172                 struct xt_standard_target *t;
 173
 174                 t = (struct xt_standard_target *)target;
 175
 176                 switch (t->verdict) {
 177                 case XT_RETURN:
 178                 case -NF_ACCEPT - 1:
 179                 case -NF_DROP - 1:
 180                 case -NF_QUEUE - 1:
 181                 case -NF_STOP - 1:
 182                         return false;
 183
 184                 default:
 185                         return true;
 186                 }
 187         }
 188
 189         return false;
 190 }
 191
 192 static gboolean is_chain(struct connman_iptables *table,
 193                                 struct connman_iptables_entry *e)
 194 {
 195         struct ipt_entry *entry;
 196         struct xt_entry_target *target;
 197
 198         entry = e->entry;
 199         if (e->builtin >= 0)
 200                 return TRUE;
 201
 202         target = ipt_get_target(entry);
 203         if (!strcmp(target->u.user.name, IPT_ERROR_TARGET))
 204                 return TRUE;
 205
 206         return FALSE;
 207 }
 208
 209 static GList *find_chain_head(struct connman_iptables *table,
 210                                 char *chain_name)
 211 {
 212         GList *list;
 213         struct connman_iptables_entry *head;
 214         struct ipt_entry *entry;
 215         struct xt_entry_target *target;
 216         int builtin;
 217
 218         for (list = table->entries; list; list = list->next) {
 219                 head = list->data;
 220                 entry = head->entry;
 221
 222                 /* Buit-in chain */
 223                 builtin = head->builtin;
 224                 if (builtin >= 0 && !strcmp(hooknames[builtin], chain_name))
 225                         break;
 226
 227                 /* User defined chain */
 228                 target = ipt_get_target(entry);
 229                 if (!strcmp(target->u.user.name, IPT_ERROR_TARGET) &&
 230                     !strcmp((char *)target->data, chain_name))
 231                         break;
 232         }
 233
 234         return list;
 235 }
 236
 237 static GList *find_chain_tail(struct connman_iptables *table,
 238                                 char *chain_name)
 239 {
 240         GList *chain_head, *list;
 241         struct connman_iptables_entry *tail;
 242
 243         chain_head = find_chain_head(table, chain_name);
 244         if (chain_head == NULL)
 245                 return NULL;
 246
 247         /* Then we look for the next chain */
 248         for (list = chain_head->next; list; list = list->next) {
 249                 tail = list->data;
 250
 251                 if (is_chain(table, tail))
 252                         return list;
 253         }
 254
 255         /* Nothing found, we return the table end */
 256         return g_list_last(table->entries);
 257 }
 258
 259 static void update_offsets(struct connman_iptables *table)
 260 {
 261         GList *list, *prev;
 262         struct connman_iptables_entry *entry, *prev_entry;
 263
 264         for (list = table->entries; list; list = list->next) {
 265                 entry = list->data;
 266
 267                 if (list == table->entries) {
 268                         entry->offset = 0;
 269
 270                         continue;
 271                 }
 272
 273                 prev = list->prev;
 274                 prev_entry = prev->data;
 275
 276                 entry->offset = prev_entry->offset +
 277                                         prev_entry->entry->next_offset;
 278         }
 279 }
 280
 281 static void update_targets_reference(struct connman_iptables *table,
 282                                 struct connman_iptables_entry *entry_before,
 283                                 struct connman_iptables_entry *modified_entry,
 284                                 gboolean is_removing)
 285 {
 286         struct connman_iptables_entry *tmp;
 287         struct xt_standard_target *t;
 288         GList *list;
 289         int offset;
 290
 291         offset = modified_entry->entry->next_offset;
 292
 293         for (list = table->entries; list; list = list->next) {
 294                 tmp = list->data;
 295
 296                 if (!is_jump(tmp))
 297                         continue;
 298
 299                 t = (struct xt_standard_target *)ipt_get_target(tmp->entry);
 300
 301                 if (is_removing == TRUE) {
 302                         if (t->verdict >= entry_before->offset)
 303                                 t->verdict -= offset;
 304                 } else {
 305                         if (t->verdict > entry_before->offset)
 306                                 t->verdict += offset;
 307                 }
 308         }
 309 }
 310
 311 static int connman_add_entry(struct connman_iptables *table,
 312                                 struct ipt_entry *entry, GList *before,
 313                                         int builtin)
 314 {
 315         struct connman_iptables_entry *e, *entry_before;
 316
 317         if (table == NULL)
 318                 return -1;
 319
 320         e = g_try_malloc0(sizeof(struct connman_iptables_entry));
 321         if (e == NULL)
 322                 return -1;
 323
 324         e->entry = entry;
 325         e->builtin = builtin;
 326
 327         table->entries = g_list_insert_before(table->entries, before, e);
 328         table->num_entries++;
 329         table->size += entry->next_offset;
 330
 331         if (before == NULL) {
 332                 e->offset = table->size - entry->next_offset;
 333
 334                 return 0;
 335         }
 336
 337         entry_before = before->data;
 338
 339         /*
 340          * We've just appended/insterted a new entry. All references
 341          * should be bumped accordingly.
 342          */
 343         update_targets_reference(table, entry_before, e, FALSE);
 344
 345         update_offsets(table);
 346
 347         return 0;
 348 }
 349
 350 static int remove_table_entry(struct connman_iptables *table,
 351                                         struct connman_iptables_entry *entry)
 352 {
 353         int removed = 0;
 354
 355         table->num_entries--;
 356         table->size -= entry->entry->next_offset;
 357         removed = entry->entry->next_offset;
 358
 359         g_free(entry->entry);
 360
 361         table->entries = g_list_remove(table->entries, entry);
 362
 363         return removed;
 364 }
 365
 366 static int connman_iptables_flush_chain(struct connman_iptables *table,
 367                                                 char *name)
 368 {
 369         GList *chain_head, *chain_tail, *list, *next;
 370         struct connman_iptables_entry *entry;
 371         int builtin, removed = 0;
 372
 373         chain_head = find_chain_head(table, name);
 374         if (chain_head == NULL)
 375                 return -EINVAL;
 376
 377         chain_tail = find_chain_tail(table, name);
 378         if (chain_tail == NULL)
 379                 return -EINVAL;
 380
 381         entry = chain_head->data;
 382         builtin = entry->builtin;
 383
 384         if (builtin >= 0)
 385                 list = chain_head;
 386         else
 387                 list = chain_head->next;
 388
 389         if (list == chain_tail->prev)
 390                 return 0;
 391
 392         while (list != chain_tail->prev) {
 393                 entry = list->data;
 394                 next = g_list_next(list);
 395
 396                 removed += remove_table_entry(table, entry);
 397
 398                 list = next;
 399         }
 400
 401         if (builtin >= 0) {
 402                 struct connman_iptables_entry *e;
 403
 404                 entry = list->data;
 405
 406                 entry->builtin = builtin;
 407
 408                 table->underflow[builtin] -= removed;
 409
 410                 for (list = chain_tail; list; list = list->next) {
 411                         e = list->data;
 412
 413                         builtin = e->builtin;
 414                         if (builtin < 0)
 415                                 continue;
 416
 417                         table->hook_entry[builtin] -= removed;
 418                         table->underflow[builtin] -= removed;
 419                 }
 420         }
 421
 422         update_offsets(table);
 423
 424         return 0;
 425 }
 426
 427 static int connman_iptables_delete_chain(struct connman_iptables *table,
 428                                                 char *name)
 429 {
 430         GList *chain_head, *chain_tail;
 431         struct connman_iptables_entry *entry;
 432
 433         chain_head = find_chain_head(table, name);
 434         if (chain_head == NULL)
 435                 return -EINVAL;
 436
 437         entry = chain_head->data;
 438
 439         /* We cannot remove builtin chain */
 440         if (entry->builtin >= 0)
 441                 return -EINVAL;
 442
 443         chain_tail = find_chain_tail(table, name);
 444         if (chain_tail == NULL)
 445                 return -EINVAL;
 446
 447         /* Chain must be flushed */
 448         if (chain_head->next != chain_tail->prev)
 449                 return -EINVAL;
 450
 451         remove_table_entry(table, entry);
 452
 453         entry = chain_tail->prev->data;
 454         remove_table_entry(table, entry);
 455
 456         update_offsets(table);
 457
 458         return 0;
 459 }
 460
 461 static int connman_iptables_add_chain(struct connman_iptables *table,
 462                                         char *name)
 463 {
 464         GList *last;
 465         struct ipt_entry *entry_head;
 466         struct ipt_entry *entry_return;
 467         struct error_target *error;
 468         struct ipt_standard_target *standard;
 469         u_int16_t entry_head_size, entry_return_size;
 470
 471         last = g_list_last(table->entries);
 472
 473         /*
 474          * An empty chain is composed of:
 475          * - A head entry, with no match and an error target.
 476          *   The error target data is the chain name.
 477          * - A tail entry, with no match and a standard target.
 478          *   The standard target verdict is XT_RETURN (return to the
 479          *   caller).
 480          */
 481
 482         /* head entry */
 483         entry_head_size = sizeof(struct ipt_entry) +
 484                                 sizeof(struct error_target);
 485         entry_head = g_try_malloc0(entry_head_size);
 486         if (entry_head == NULL)
 487                 goto err_head;
 488
 489         memset(entry_head, 0, entry_head_size);
 490
 491         entry_head->target_offset = sizeof(struct ipt_entry);
 492         entry_head->next_offset = entry_head_size;
 493
 494         error = (struct error_target *) entry_head->elems;
 495         strcpy(error->t.u.user.name, IPT_ERROR_TARGET);
 496         error->t.u.user.target_size = ALIGN(sizeof(struct error_target));
 497         strcpy(error->error, name);
 498
 499         if (connman_add_entry(table, entry_head, last, -1) < 0)
 500                 goto err_head;
 501
 502         /* tail entry */
 503         entry_return_size = sizeof(struct ipt_entry) +
 504                                 sizeof(struct ipt_standard_target);
 505         entry_return = g_try_malloc0(entry_return_size);
 506         if (entry_return == NULL)
 507                 goto err;
 508
 509         memset(entry_return, 0, entry_return_size);
 510
 511         entry_return->target_offset = sizeof(struct ipt_entry);
 512         entry_return->next_offset = entry_return_size;
 513
 514         standard = (struct ipt_standard_target *) entry_return->elems;
 515         standard->target.u.user.target_size =
 516                                 ALIGN(sizeof(struct ipt_standard_target));
 517         standard->verdict = XT_RETURN;
 518
 519         if (connman_add_entry(table, entry_return, last, -1) < 0)
 520                 goto err;
 521
 522         return 0;
 523
 524 err:
 525         g_free(entry_return);
 526 err_head:
 527         g_free(entry_head);
 528
 529         return -ENOMEM;
 530 }
 531
 532 static struct ipt_entry *
 533 new_rule(struct ipt_ip *ip, char *target_name,
 534                 struct xtables_target *xt_t,
 535                 char *match_name, struct xtables_match *xt_m)
 536 {
 537         struct ipt_entry *new_entry;
 538         size_t match_size, target_size;
 539
 540         if (xt_m)
 541                 match_size = xt_m->m->u.match_size;
 542         else
 543                 match_size = 0;
 544
 545         if (xt_t)
 546                 target_size = ALIGN(xt_t->t->u.target_size);
 547         else
 548                 target_size = ALIGN(sizeof(struct xt_standard_target));
 549
 550         new_entry = g_try_malloc0(sizeof(struct ipt_entry) + target_size +
 551                                                                 match_size);
 552         if (new_entry == NULL)
 553                 return NULL;
 554
 555         memcpy(&new_entry->ip, ip, sizeof(struct ipt_ip));
 556
 557         new_entry->target_offset = sizeof(struct ipt_entry) + match_size;
 558         new_entry->next_offset = sizeof(struct ipt_entry) + target_size +
 559                                                                 match_size;
 560         if (xt_m) {
 561                 struct xt_entry_match *entry_match;
 562
 563                 entry_match = (struct xt_entry_match *)new_entry->elems;
 564                 memcpy(entry_match, xt_m->m, match_size);
 565         }
 566
 567         if (xt_t) {
 568                 struct xt_entry_target *entry_target;
 569
 570                 entry_target = ipt_get_target(new_entry);
 571                 memcpy(entry_target, xt_t->t, target_size);
 572         }
 573
 574         return new_entry;
 575 }
 576
 577 static void update_hooks(struct connman_iptables *table, GList *chain_head,
 578                                 struct ipt_entry *entry)
 579 {
 580         GList *list;
 581         struct connman_iptables_entry *head, *e;
 582         int builtin;
 583
 584         if (chain_head == NULL)
 585                 return;
 586
 587         head = chain_head->data;
 588
 589         builtin = head->builtin;
 590         if (builtin < 0)
 591                 return;
 592
 593         table->underflow[builtin] += entry->next_offset;
 594
 595         for (list = chain_head->next; list; list = list->next) {
 596                 e = list->data;
 597
 598                 builtin = e->builtin;
 599                 if (builtin < 0)
 600                         continue;
 601
 602                 table->hook_entry[builtin] += entry->next_offset;
 603                 table->underflow[builtin] += entry->next_offset;
 604         }
 605 }
 606
 607 static struct ipt_entry *prepare_rule_inclusion(struct connman_iptables *table,
 608                                 struct ipt_ip *ip, char *chain_name,
 609                                 char *target_name, struct xtables_target *xt_t,
 610                                 char *match_name, struct xtables_match *xt_m,
 611                                 int *builtin)
 612 {
 613         GList *chain_tail, *chain_head;
 614         struct ipt_entry *new_entry;
 615         struct connman_iptables_entry *head;
 616
 617         chain_head = find_chain_head(table, chain_name);
 618         if (chain_head == NULL)
 619                 return NULL;
 620
 621         chain_tail = find_chain_tail(table, chain_name);
 622         if (chain_tail == NULL)
 623                 return NULL;
 624
 625         new_entry = new_rule(ip, target_name, xt_t, match_name, xt_m);
 626         if (new_entry == NULL)
 627                 return NULL;
 628
 629         update_hooks(table, chain_head, new_entry);
 630
 631         /*
 632          * If the chain is builtin, and does not have any rule,
 633          * then the one that we're inserting is becoming the head
 634          * and thus needs the builtin flag.
 635          */
 636         head = chain_head->data;
 637         if (head->builtin < 0)
 638                 *builtin = -1;
 639         else if (chain_head == chain_tail->prev) {
 640                 *builtin = head->builtin;
 641                 head->builtin = -1;
 642         }
 643
 644         return new_entry;
 645 }
 646
 647 static int
 648 connman_iptables_append_rule(struct connman_iptables *table,
 649                                 struct ipt_ip *ip, char *chain_name,
 650                                 char *target_name, struct xtables_target *xt_t,
 651                                 char *match_name, struct xtables_match *xt_m)
 652 {
 653         GList *chain_tail;
 654         struct ipt_entry *new_entry;
 655         int builtin = -1, ret;
 656
 657         chain_tail = find_chain_tail(table, chain_name);
 658         if (chain_tail == NULL)
 659                 return -EINVAL;
 660
 661         new_entry = prepare_rule_inclusion(table, ip, chain_name,
 662                         target_name, xt_t, match_name, xt_m, &builtin);
 663         if (new_entry == NULL)
 664                 return -EINVAL;
 665
 666         ret = connman_add_entry(table, new_entry, chain_tail->prev, builtin);
 667         if (ret < 0)
 668                 g_free(new_entry);
 669
 670         return ret;
 671 }
 672
 673 static int connman_iptables_insert_rule(struct connman_iptables *table,
 674                                 struct ipt_ip *ip, char *chain_name,
 675                                 char *target_name, struct xtables_target *xt_t,
 676                                 char *match_name, struct xtables_match *xt_m)
 677 {
 678         GList *chain_head;
 679         struct ipt_entry *new_entry;
 680         int builtin = -1, ret;
 681
 682         chain_head = find_chain_head(table, chain_name);
 683         if (chain_head == NULL)
 684                 return -EINVAL;
 685
 686         new_entry = prepare_rule_inclusion(table, ip, chain_name,
 687                         target_name, xt_t, match_name, xt_m, &builtin);
 688         if (new_entry == NULL)
 689                 return -EINVAL;
 690
 691         ret = connman_add_entry(table, new_entry, chain_head->next, builtin);
 692         if (ret < 0)
 693                 g_free(new_entry);
 694
 695         return ret;
 696 }
 697
 698 static gboolean is_same_ipt_entry(struct ipt_entry *i_e1,
 699                                         struct ipt_entry *i_e2)
 700 {
 701         if (memcmp(&i_e1->ip, &i_e2->ip, sizeof(struct ipt_ip)) != 0)
 702                 return FALSE;
 703
 704         if (i_e1->target_offset != i_e2->target_offset)
 705                 return FALSE;
 706
 707         if (i_e1->next_offset != i_e2->next_offset)
 708                 return FALSE;
 709
 710         return TRUE;
 711 }
 712
 713 static gboolean is_same_target(struct xt_entry_target *xt_e_t1,
 714                                         struct xt_entry_target *xt_e_t2)
 715 {
 716         if (xt_e_t1 == NULL || xt_e_t2 == NULL)
 717                 return FALSE;
 718
 719         if (strcmp(xt_e_t1->u.user.name, IPT_STANDARD_TARGET) == 0) {
 720                 struct xt_standard_target *xt_s_t1;
 721                 struct xt_standard_target *xt_s_t2;
 722
 723                 xt_s_t1 = (struct xt_standard_target *) xt_e_t1;
 724                 xt_s_t2 = (struct xt_standard_target *) xt_e_t2;
 725
 726                 if (xt_s_t1->verdict != xt_s_t2->verdict)
 727                         return FALSE;
 728         } else {
 729                 if (xt_e_t1->u.target_size != xt_e_t2->u.target_size)
 730                         return FALSE;
 731
 732                 if (strcmp(xt_e_t1->u.user.name, xt_e_t2->u.user.name) != 0)
 733                         return FALSE;
 734         }
 735
 736         return TRUE;
 737 }
 738
 739 static gboolean is_same_match(struct xt_entry_match *xt_e_m1,
 740                                 struct xt_entry_match *xt_e_m2)
 741 {
 742         if (xt_e_m1 == NULL || xt_e_m2 == NULL)
 743                 return FALSE;
 744
 745         if (xt_e_m1->u.match_size != xt_e_m2->u.match_size)
 746                 return FALSE;
 747
 748         if (xt_e_m1->u.user.revision != xt_e_m2->u.user.revision)
 749                 return FALSE;
 750
 751         if (strcmp(xt_e_m1->u.user.name, xt_e_m2->u.user.name) != 0)
 752                 return FALSE;
 753
 754         return TRUE;
 755 }
 756
 757 static int connman_iptables_delete_rule(struct connman_iptables *table,
 758                                 struct ipt_ip *ip, char *chain_name,
 759                                 char *target_name, struct xtables_target *xt_t,
 760                                 char *match_name, struct xtables_match *xt_m)
 761 {
 762         GList *chain_tail, *chain_head, *list;
 763         struct xt_entry_target *xt_e_t = NULL;
 764         struct xt_entry_match *xt_e_m = NULL;
 765         struct connman_iptables_entry *entry;
 766         struct ipt_entry *entry_test;
 767         int builtin, removed;
 768
 769         removed = 0;
 770
 771         chain_head = find_chain_head(table, chain_name);
 772         if (chain_head == NULL)
 773                 return -EINVAL;
 774
 775         chain_tail = find_chain_tail(table, chain_name);
 776         if (chain_tail == NULL)
 777                 return -EINVAL;
 778
 779         if (!xt_t && !xt_m)
 780                 return -EINVAL;
 781
 782         entry_test = new_rule(ip, target_name, xt_t, match_name, xt_m);
 783         if (entry_test == NULL)
 784                 return -EINVAL;
 785
 786         if (xt_t != NULL)
 787                 xt_e_t = ipt_get_target(entry_test);
 788         if (xt_m != NULL)
 789                 xt_e_m = (struct xt_entry_match *)entry_test->elems;
 790
 791         entry = chain_head->data;
 792         builtin = entry->builtin;
 793
 794         if (builtin >= 0)
 795                 list = chain_head;
 796         else
 797                 list = chain_head->next;
 798
 799         for (entry = NULL; list != chain_tail->prev; list = list->next) {
 800                 struct connman_iptables_entry *tmp;
 801                 struct ipt_entry *tmp_e;
 802
 803                 tmp = list->data;
 804                 tmp_e = tmp->entry;
 805
 806                 if (is_same_ipt_entry(entry_test, tmp_e) == FALSE)
 807                         continue;
 808
 809                 if (xt_t != NULL) {
 810                         struct xt_entry_target *tmp_xt_e_t;
 811
 812                         tmp_xt_e_t = ipt_get_target(tmp_e);
 813
 814                         if (!is_same_target(tmp_xt_e_t, xt_e_t))
 815                                 continue;
 816                 }
 817
 818                 if (xt_m != NULL) {
 819                         struct xt_entry_match *tmp_xt_e_m;
 820
 821                         tmp_xt_e_m = (struct xt_entry_match *)tmp_e->elems;
 822
 823                         if (!is_same_match(tmp_xt_e_m, xt_e_m))
 824                                 continue;
 825                 }
 826
 827                 entry = tmp;
 828                 break;
 829         }
 830
 831         if (entry == NULL) {
 832                 g_free(entry_test);
 833                 return -EINVAL;
 834         }
 835
 836         /* We have deleted a rule,
 837          * all references should be bumped accordingly */
 838         if (list->next != NULL)
 839                 update_targets_reference(table, list->next->data,
 840                                                 list->data, TRUE);
 841
 842         removed += remove_table_entry(table, entry);
 843
 844         if (builtin >= 0) {
 845                 list = list->next;
 846                 if (list) {
 847                         entry = list->data;
 848                         entry->builtin = builtin;
 849                 }
 850
 851                 table->underflow[builtin] -= removed;
 852                 for (list = chain_tail; list; list = list->next) {
 853                         entry = list->data;
 854
 855                         builtin = entry->builtin;
 856                         if (builtin < 0)
 857                                 continue;
 858
 859                         table->hook_entry[builtin] -= removed;
 860                         table->underflow[builtin] -= removed;
 861                 }
 862         }
 863
 864         update_offsets(table);
 865
 866         return 0;
 867 }
 868
 869 static struct ipt_replace *
 870 connman_iptables_blob(struct connman_iptables *table)
 871 {
 872         struct ipt_replace *r;
 873         GList *list;
 874         struct connman_iptables_entry *e;
 875         unsigned char *entry_index;
 876
 877         r = g_try_malloc0(sizeof(struct ipt_replace) + table->size);
 878         if (r == NULL)
 879                 return NULL;
 880
 881         memset(r, 0, sizeof(*r) + table->size);
 882
 883         r->counters = g_try_malloc0(sizeof(struct xt_counters)
 884                                 * table->old_entries);
 885         if (r->counters == NULL) {
 886                 g_free(r);
 887                 return NULL;
 888         }
 889
 890         strcpy(r->name, table->info->name);
 891         r->num_entries = table->num_entries;
 892         r->size = table->size;
 893
 894         r->num_counters = table->old_entries;
 895         r->valid_hooks  = table->info->valid_hooks;
 896
 897         memcpy(r->hook_entry, table->hook_entry, sizeof(table->hook_entry));
 898         memcpy(r->underflow, table->underflow, sizeof(table->underflow));
 899
 900         entry_index = (unsigned char *)r->entries;
 901         for (list = table->entries; list; list = list->next) {
 902                 e = list->data;
 903
 904                 memcpy(entry_index, e->entry, e->entry->next_offset);
 905                 entry_index += e->entry->next_offset;
 906         }
 907
 908         return r;
 909 }
 910
 911 static void dump_target(struct connman_iptables *table,
 912                                 struct ipt_entry *entry)
 913
 914 {
 915         struct xtables_target *xt_t;
 916         struct xt_entry_target *target;
 917
 918         target = ipt_get_target(entry);
 919
 920         if (!strcmp(target->u.user.name, IPT_STANDARD_TARGET)) {
 921                 struct xt_standard_target *t;
 922
 923                 t = (struct xt_standard_target *)target;
 924
 925                 switch (t->verdict) {
 926                 case XT_RETURN:
 927                         printf("\ttarget RETURN\n");
 928                         break;
 929
 930                 case -NF_ACCEPT - 1:
 931                         printf("\ttarget ACCEPT\n");
 932                         break;
 933
 934                 case -NF_DROP - 1:
 935                         printf("\ttarget DROP\n");
 936                         break;
 937
 938                 case -NF_QUEUE - 1:
 939                         printf("\ttarget QUEUE\n");
 940                         break;
 941
 942                 case -NF_STOP - 1:
 943                         printf("\ttarget STOP\n");
 944                         break;
 945
 946                 default:
 947                         printf("\tJUMP @%p (0x%x)\n",
 948                                 (char*)table->blob_entries->entrytable +
 949                                 t->verdict, t->verdict);
 950                         break;
 951                 }
 952
 953                 xt_t = xtables_find_target(IPT_STANDARD_TARGET,
 954                                                 XTF_LOAD_MUST_SUCCEED);
 955
 956                 if(xt_t->print != NULL)
 957                         xt_t->print(NULL, target, 1);
 958         } else {
 959                 xt_t = xtables_find_target(target->u.user.name, XTF_TRY_LOAD);
 960                 if (xt_t == NULL) {
 961                         printf("\ttarget %s\n", target->u.user.name);
 962                         return;
 963                 }
 964
 965                 if(xt_t->print != NULL) {
 966                         printf("\ttarget ");
 967                         xt_t->print(NULL, target, 1);
 968                         printf("\n");
 969                 }
 970         }
 971 }
 972
 973 static void dump_match(struct connman_iptables *table, struct ipt_entry *entry)
 974 {
 975         struct xtables_match *xt_m;
 976         struct xt_entry_match *match;
 977
 978         if (entry->elems == (unsigned char *)entry + entry->target_offset)
 979                 return;
 980
 981         match = (struct xt_entry_match *) entry->elems;
 982
 983         if (!strlen(match->u.user.name))
 984                 return;
 985
 986         xt_m = xtables_find_match(match->u.user.name, XTF_TRY_LOAD, NULL);
 987         if (xt_m == NULL)
 988                 goto out;
 989
 990         if(xt_m->print != NULL) {
 991                 printf("\tmatch ");
 992                 xt_m->print(NULL, match, 1);
 993                 printf("\n");
 994
 995                 return;
 996         }
 997
 998 out:
 999         printf("\tmatch %s\n", match->u.user.name);
1000
1001 }
1002
1003 static int connman_iptables_dump_entry(struct ipt_entry *entry,
1004                                         struct connman_iptables *table)
1005 {
1006         struct xt_entry_target *target;
1007         unsigned int offset;
1008         int builtin;
1009
1010         offset = (char *)entry - (char *)table->blob_entries->entrytable;
1011         target = ipt_get_target(entry);
1012         builtin = is_hook_entry(table, entry);
1013
1014         if (entry_to_offset(table, entry) + entry->next_offset ==
1015                                         table->blob_entries->size) {
1016                 printf("End of CHAIN 0x%x\n", offset);
1017                 return 0;
1018         }
1019
1020         if (!strcmp(target->u.user.name, IPT_ERROR_TARGET)) {
1021                 printf("USER CHAIN (%s) %p  match %p  target %p  size %d\n",
1022                         target->data, entry, entry->elems,
1023                         (char *)entry + entry->target_offset,
1024                                 entry->next_offset);
1025
1026                 return 0;
1027         } else if (builtin >= 0) {
1028                 printf("CHAIN (%s) %p  match %p  target %p  size %d\n",
1029                         hooknames[builtin], entry, entry->elems,
1030                         (char *)entry + entry->target_offset,
1031                                 entry->next_offset);
1032         } else {
1033                 printf("RULE %p  match %p  target %p  size %d\n", entry,
1034                         entry->elems,
1035                         (char *)entry + entry->target_offset,
1036                                 entry->next_offset);
1037         }
1038
1039         dump_match(table, entry);
1040         dump_target(table, entry);
1041
1042         return 0;
1043 }
1044
1045 static void connman_iptables_dump_hook(struct connman_iptables *table)
1046 {
1047         int i;
1048         printf("hooks: \n");
1049         for (i = 0; i < NF_INET_NUMHOOKS; i++) {
1050                 if ((table->info->valid_hooks & (1 << i)))
1051                         printf("%s entry %p underflow %p (%#x)\n",
1052                                 hooknames[i],
1053                                 table->blob_entries->entrytable +
1054                                                 table->info->hook_entry[i],
1055                                 table->blob_entries->entrytable +
1056                                                 table->info->underflow[i],
1057                                         table->info->underflow[i]);
1058         }
1059 }
1060
1061 static void connman_iptables_dump(struct connman_iptables *table)
1062 {
1063         printf("%s valid_hooks=0x%08x, num_entries=%u, size=%u\n",
1064                 table->info->name,
1065                 table->info->valid_hooks, table->info->num_entries,
1066                 table->info->size);
1067
1068         connman_iptables_dump_hook(table);
1069
1070         ENTRY_ITERATE(table->blob_entries->entrytable,
1071                         table->blob_entries->size,
1072                         connman_iptables_dump_entry, table);
1073
1074 }
1075
1076 static int connman_iptables_get_entries(struct connman_iptables *table)
1077 {
1078         socklen_t entry_size;
1079
1080         entry_size = sizeof(struct ipt_get_entries) + table->info->size;
1081
1082         return getsockopt(table->ipt_sock, IPPROTO_IP, IPT_SO_GET_ENTRIES,
1083                                 table->blob_entries, &entry_size);
1084 }
1085
1086 static int connman_iptables_replace(struct connman_iptables *table,
1087                                         struct ipt_replace *r)
1088 {
1089         return setsockopt(table->ipt_sock, IPPROTO_IP, IPT_SO_SET_REPLACE, r,
1090                          sizeof(*r) + r->size);
1091 }
1092
1093 static void connman_iptables_cleanup(struct connman_iptables *table)
1094 {
1095         GList *list;
1096         struct connman_iptables_entry *entry;
1097
1098         close(table->ipt_sock);
1099
1100         for (list = table->entries; list; list = list->next) {
1101                 entry = list->data;
1102
1103                 g_free(entry->entry);
1104         }
1105
1106         g_free(table->info);
1107         g_free(table->blob_entries);
1108         g_free(table);
1109
1110         xtables_free_opts(1);
1111 }
1112
1113 static int connman_iptables_commit(struct connman_iptables *table)
1114 {
1115         struct ipt_replace *repl;
1116
1117         repl = connman_iptables_blob(table);
1118
1119         return connman_iptables_replace(table, repl);
1120 }
1121
1122 static int add_entry(struct ipt_entry *entry, struct connman_iptables *table)
1123 {
1124         struct ipt_entry *new_entry;
1125         int builtin;
1126
1127         new_entry = g_try_malloc0(entry->next_offset);
1128         if (new_entry == NULL)
1129                 return -ENOMEM;
1130
1131         memcpy(new_entry, entry, entry->next_offset);
1132
1133         builtin = is_hook_entry(table, entry);
1134
1135         return connman_add_entry(table, new_entry, NULL, builtin);
1136 }
1137
1138 static struct connman_iptables *connman_iptables_init(const char *table_name)
1139 {
1140         struct connman_iptables *table;
1141         socklen_t s;
1142
1143         table =  g_try_new0(struct connman_iptables, 1);
1144         if (table == NULL)
1145                 return NULL;
1146
1147         table->info =  g_try_new0(struct ipt_getinfo, 1);
1148         if (table->info == NULL)
1149                 goto err;
1150
1151         table->ipt_sock = socket(AF_INET, SOCK_RAW, IPPROTO_RAW);
1152         if (table->ipt_sock < 0)
1153                 goto err;
1154
1155         s = sizeof(*table->info);
1156         strcpy(table->info->name, table_name);
1157         if (getsockopt(table->ipt_sock, IPPROTO_IP, IPT_SO_GET_INFO,
1158                                                 table->info, &s) < 0)
1159                 goto err;
1160
1161         table->blob_entries = g_try_malloc0(sizeof(struct ipt_get_entries) +
1162                                                 table->info->size);
1163         if (table->blob_entries == NULL)
1164                 goto err;
1165
1166         strcpy(table->blob_entries->name, table_name);
1167         table->blob_entries->size = table->info->size;
1168
1169         if (connman_iptables_get_entries(table) < 0)
1170                 goto err;
1171
1172         table->num_entries = 0;
1173         table->old_entries = table->info->num_entries;
1174         table->size = 0;
1175
1176         memcpy(table->underflow, table->info->underflow,
1177                                 sizeof(table->info->underflow));
1178         memcpy(table->hook_entry, table->info->hook_entry,
1179                                 sizeof(table->info->hook_entry));
1180
1181         ENTRY_ITERATE(table->blob_entries->entrytable,
1182                         table->blob_entries->size,
1183                                 add_entry, table);
1184
1185
1186         return table;
1187
1188 err:
1189
1190         connman_iptables_cleanup(table);
1191
1192         return NULL;
1193 }
1194
1195 static struct xtables_target *prepare_target(struct connman_iptables *table,
1196                                                         char *target_name)
1197 {
1198         struct xtables_target *xt_t = NULL;
1199         gboolean is_builtin, is_user_defined;
1200         GList *chain_head = NULL;
1201         size_t target_size;
1202
1203         is_builtin = FALSE;
1204         is_user_defined = FALSE;
1205
1206         if (is_builtin_target(target_name))
1207                 is_builtin = TRUE;
1208         else {
1209                 chain_head = find_chain_head(table, target_name);
1210                 if (chain_head != NULL && chain_head->next != NULL)
1211                         is_user_defined = TRUE;
1212         }
1213
1214         if (is_builtin || is_user_defined)
1215                 xt_t = xtables_find_target(IPT_STANDARD_TARGET,
1216                                                 XTF_LOAD_MUST_SUCCEED);
1217         else
1218                 xt_t = xtables_find_target(target_name, XTF_TRY_LOAD);
1219
1220         if (xt_t == NULL)
1221                 return NULL;
1222
1223         target_size = ALIGN(sizeof(struct ipt_entry_target)) + xt_t->size;
1224
1225         xt_t->t = g_try_malloc0(target_size);
1226         if (xt_t->t == NULL)
1227                 return NULL;
1228
1229         xt_t->t->u.target_size = target_size;
1230
1231         if (is_builtin || is_user_defined) {
1232                 struct xt_standard_target *target;
1233
1234                 target = (struct xt_standard_target *)(xt_t->t);
1235                 strcpy(target->target.u.user.name, IPT_STANDARD_TARGET);
1236
1237                 if (is_builtin == TRUE)
1238                         target->verdict = target_to_verdict(target_name);
1239                 else if (is_user_defined == TRUE) {
1240                         struct connman_iptables_entry *target_rule;
1241
1242                         if (chain_head == NULL) {
1243                                 g_free(xt_t->t);
1244                                 return NULL;
1245                         }
1246
1247                         target_rule = chain_head->next->data;
1248                         target->verdict = target_rule->offset;
1249                 }
1250         } else {
1251                 strcpy(xt_t->t->u.user.name, target_name);
1252                 xt_t->t->u.user.revision = xt_t->revision;
1253                 if (xt_t->init != NULL)
1254                         xt_t->init(xt_t->t);
1255         }
1256
1257         return xt_t;
1258 }
1259
1260 static struct option connman_iptables_opts[] = {
1261         {.name = "append",        .has_arg = 1, .val = 'A'},
1262         {.name = "delete",        .has_arg = 1, .val = 'D'},
1263         {.name = "flush-chain",   .has_arg = 1, .val = 'F'},
1264         {.name = "insert",        .has_arg = 1, .val = 'I'},
1265         {.name = "list",          .has_arg = 2, .val = 'L'},
1266         {.name = "new-chain",     .has_arg = 1, .val = 'N'},
1267         {.name = "delete-chain",  .has_arg = 1, .val = 'X'},
1268         {.name = "destination",   .has_arg = 1, .val = 'd'},
1269         {.name = "in-interface",  .has_arg = 1, .val = 'i'},
1270         {.name = "jump",          .has_arg = 1, .val = 'j'},
1271         {.name = "match",         .has_arg = 1, .val = 'm'},
1272         {.name = "out-interface", .has_arg = 1, .val = 'o'},
1273         {.name = "source",        .has_arg = 1, .val = 's'},
1274         {.name = "table",         .has_arg = 1, .val = 't'},
1275         {NULL},
1276 };
1277
1278 struct xtables_globals connman_iptables_globals = {
1279         .option_offset = 0,
1280         .opts = connman_iptables_opts,
1281         .orig_opts = connman_iptables_opts,
1282 };
1283
1284 int main(int argc, char *argv[])
1285 {
1286         struct connman_iptables *table;
1287         struct xtables_match *xt_m;
1288         struct xtables_target *xt_t;
1289         struct ipt_ip ip;
1290         char *table_name, *chain, *new_chain, *match_name, *target_name;
1291         char *delete_chain, *flush_chain;
1292         int c, in_len, out_len;
1293         size_t size;
1294         gboolean dump, invert, delete, insert, delete_rule;
1295         struct in_addr src, dst;
1296
1297         xtables_init_all(&connman_iptables_globals, NFPROTO_IPV4);
1298
1299         dump = FALSE;
1300         invert = FALSE;
1301         delete = FALSE;
1302         insert = FALSE;
1303         delete_rule = FALSE;
1304         table_name = chain = new_chain = match_name = target_name = NULL;
1305         delete_chain = flush_chain = NULL;
1306         memset(&ip, 0, sizeof(struct ipt_ip));
1307         table = NULL;
1308         xt_m = NULL;
1309         xt_t = NULL;
1310
1311         while ((c = getopt_long(argc, argv, "-A:D:F:I:L::N:X:d:i:j:m:o:s:t:",
1312                                 connman_iptables_globals.opts, NULL)) != -1) {
1313                 switch (c) {
1314                 case 'A':
1315                         /* It is either -A, -D or -I at once */
1316                         if (chain)
1317                                 goto out;
1318
1319                         chain = optarg;
1320                         break;
1321
1322                 case 'D':
1323                         /* It is either -A, -D or -I at once */
1324                         if (chain)
1325                                 goto out;
1326
1327                         chain = optarg;
1328                         delete_rule = TRUE;
1329                         break;
1330
1331                 case 'F':
1332                         flush_chain = optarg;
1333                         break;
1334
1335                 case 'I':
1336                         /* It is either -A, -D or -I at once */
1337                         if (chain)
1338                                 goto out;
1339
1340                         chain = optarg;
1341                         insert = TRUE;
1342                         break;
1343
1344                 case 'L':
1345                         dump = true;
1346                         break;
1347
1348                 case 'N':
1349                         new_chain = optarg;
1350                         break;
1351
1352                 case 'X':
1353                         delete = true;
1354                         delete_chain = optarg;
1355                         break;
1356
1357                 case 'd':
1358                         if (!inet_pton(AF_INET, optarg, &dst))
1359                                 break;
1360
1361                         ip.dst = dst;
1362                         inet_pton(AF_INET, "255.255.255.255", &ip.dmsk);
1363
1364                         if (invert)
1365                                 ip.invflags |= IPT_INV_DSTIP;
1366
1367                         break;
1368
1369                 case 'i':
1370                         in_len = strlen(optarg);
1371
1372                         if (in_len + 1 > IFNAMSIZ)
1373                                 break;
1374
1375                         strcpy(ip.iniface, optarg);
1376                         memset(ip.iniface_mask, 0xff, in_len + 1);
1377
1378                         if (invert)
1379                                 ip.invflags |= IPT_INV_VIA_IN;
1380
1381                         break;
1382
1383                 case 'j':
1384                         target_name = optarg;
1385                         break;
1386
1387                 case 'm':
1388                         match_name = optarg;
1389
1390                         xt_m = xtables_find_match(optarg, XTF_LOAD_MUST_SUCCEED, NULL);
1391                         size = ALIGN(sizeof(struct ipt_entry_match)) + xt_m->size;
1392                         xt_m->m = g_try_malloc0(size);
1393                         if (xt_m == NULL)
1394                                 goto out;
1395                         xt_m->m->u.match_size = size;
1396                         strcpy(xt_m->m->u.user.name, xt_m->name);
1397                         xt_m->m->u.user.revision = xt_m->revision;
1398                         if (xt_m->init != NULL)
1399                                 xt_m->init(xt_m->m);
1400                         if (xt_m != xt_m->next) {
1401                                 connman_iptables_globals.opts =
1402                                         xtables_merge_options(
1403 #if XTABLES_VERSION_CODE > 5
1404                                                 connman_iptables_globals.orig_opts,
1405 #endif
1406                                                 connman_iptables_globals.opts,
1407                                                 xt_m->extra_opts,
1408                                                 &xt_m->option_offset);
1409                                 if (connman_iptables_globals.opts == NULL)
1410                                         goto out;
1411                         }
1412
1413                         break;
1414
1415                 case 'o':
1416                         out_len = strlen(optarg);
1417
1418                         if (out_len + 1 > IFNAMSIZ)
1419                                 break;
1420
1421                         strcpy(ip.outiface, optarg);
1422                         memset(ip.outiface_mask, 0xff, out_len + 1);
1423
1424                         if (invert)
1425                                 ip.invflags |= IPT_INV_VIA_OUT;
1426
1427                         break;
1428
1429                 case 's':
1430                         if (!inet_pton(AF_INET, optarg, &src))
1431                                 break;
1432
1433                         ip.src = src;
1434                         inet_pton(AF_INET, "255.255.255.255", &ip.smsk);
1435
1436                         if (invert)
1437                                 ip.invflags |= IPT_INV_SRCIP;
1438
1439                         break;
1440
1441                 case 't':
1442                         table_name = optarg;
1443                         break;
1444
1445                 case 1:
1446                         if (optarg[0] == '!' && optarg[1] == '\0') {
1447                                 if (invert)
1448                                         printf("Consecutive ! not allowed\n");
1449
1450                                 invert = TRUE;
1451                                 optarg[0] = '\0';
1452                                 continue;
1453                         }
1454
1455                         printf("Invalid option\n");
1456
1457                         return -1;
1458
1459                 default:
1460                         if (xt_t == NULL || xt_t->parse == NULL ||
1461                             !xt_t->parse(c - xt_t->option_offset, argv, invert,
1462                                         &xt_t->tflags, NULL, &xt_t->t)) {
1463                                 if (xt_m == NULL || xt_m->parse == NULL)
1464                                         break;
1465
1466                                 xt_m->parse(c - xt_m->option_offset, argv,
1467                                         invert, &xt_m->mflags, NULL, &xt_m->m);
1468                         }
1469
1470                         break;
1471                 }
1472         }
1473
1474         if (table_name == NULL)
1475                 table_name = "filter";
1476
1477         table = connman_iptables_init(table_name);
1478         if (table == NULL)
1479                 return -1;
1480
1481         if (delete) {
1482                 if (delete_chain == NULL)
1483                         goto out;
1484
1485                 printf("Delete chain %s\n", delete_chain);
1486
1487                 connman_iptables_delete_chain(table, delete_chain);
1488
1489                 goto commit;
1490         }
1491
1492         if (flush_chain) {
1493                 printf("Flush chain %s\n", flush_chain);
1494
1495                 connman_iptables_flush_chain(table, flush_chain);
1496
1497                 goto commit;
1498         }
1499
1500         if (dump) {
1501                 connman_iptables_dump(table);
1502
1503                 return 0;
1504         }
1505
1506         if (chain && new_chain)
1507                 return -1;
1508
1509         if (new_chain) {
1510                 printf("New chain %s\n", new_chain);
1511
1512                 connman_iptables_add_chain(table, new_chain);
1513
1514                 goto commit;
1515         }
1516
1517         if (chain) {
1518                 xt_t = prepare_target(table, target_name);
1519                 if (xt_t == NULL)
1520                         goto out;
1521
1522                 connman_iptables_globals.opts =
1523                         xtables_merge_options(
1524 #if XTABLES_VERSION_CODE > 5
1525                                         connman_iptables_globals.orig_opts,
1526 #endif
1527                                         connman_iptables_globals.opts,
1528                                         xt_t->extra_opts,
1529                                         &xt_t->option_offset);
1530                 if (connman_iptables_globals.opts == NULL)
1531                         goto out;
1532
1533                 if (delete_rule == TRUE) {
1534                         printf("Deleting %s to %s (match %s)\n", target_name,
1535                                         chain, match_name);
1536
1537                         connman_iptables_delete_rule(table, &ip, chain,
1538                                         target_name, xt_t, match_name, xt_m);
1539
1540                         goto commit;
1541                 }
1542
1543                 if (insert == TRUE) {
1544                         printf("Inserting %s to %s (match %s)\n", target_name,
1545                                         chain, match_name);
1546
1547                         connman_iptables_insert_rule(table, &ip, chain,
1548                                         target_name, xt_t, match_name, xt_m);
1549                 } else {
1550                         printf("Appending %s to %s (match %s)\n", target_name,
1551                                         chain, match_name);
1552
1553                         connman_iptables_append_rule(table, &ip, chain,
1554                                 target_name, xt_t, match_name, xt_m);
1555                 }
1556         }
1557
1558 commit:
1559
1560         connman_iptables_commit(table);
1561
1562 out:
1563         connman_iptables_cleanup(table);
1564
1565         if (xt_t)
1566                 g_free(xt_t->t);
1567
1568         if (xt_m)
1569                 g_free(xt_m->m);
1570
1571         return 0;
1572 }