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 *new_rule(struct ipt_ip *ip,
 533                         char *target_name, struct xtables_target *xt_t,
 534                         char *match_name, struct xtables_match *xt_m)
 535 {
 536         struct ipt_entry *new_entry;
 537         size_t match_size, target_size;
 538
 539         if (xt_m)
 540                 match_size = xt_m->m->u.match_size;
 541         else
 542                 match_size = 0;
 543
 544         if (xt_t)
 545                 target_size = ALIGN(xt_t->t->u.target_size);
 546         else
 547                 target_size = ALIGN(sizeof(struct xt_standard_target));
 548
 549         new_entry = g_try_malloc0(sizeof(struct ipt_entry) + target_size +
 550                                                                 match_size);
 551         if (new_entry == NULL)
 552                 return NULL;
 553
 554         memcpy(&new_entry->ip, ip, sizeof(struct ipt_ip));
 555
 556         new_entry->target_offset = sizeof(struct ipt_entry) + match_size;
 557         new_entry->next_offset = sizeof(struct ipt_entry) + target_size +
 558                                                                 match_size;
 559         if (xt_m) {
 560                 struct xt_entry_match *entry_match;
 561
 562                 entry_match = (struct xt_entry_match *)new_entry->elems;
 563                 memcpy(entry_match, xt_m->m, match_size);
 564         }
 565
 566         if (xt_t) {
 567                 struct xt_entry_target *entry_target;
 568
 569                 entry_target = ipt_get_target(new_entry);
 570                 memcpy(entry_target, xt_t->t, target_size);
 571         }
 572
 573         return new_entry;
 574 }
 575
 576 static void update_hooks(struct connman_iptables *table, GList *chain_head,
 577                                 struct ipt_entry *entry)
 578 {
 579         GList *list;
 580         struct connman_iptables_entry *head, *e;
 581         int builtin;
 582
 583         if (chain_head == NULL)
 584                 return;
 585
 586         head = chain_head->data;
 587
 588         builtin = head->builtin;
 589         if (builtin < 0)
 590                 return;
 591
 592         table->underflow[builtin] += entry->next_offset;
 593
 594         for (list = chain_head->next; list; list = list->next) {
 595                 e = list->data;
 596
 597                 builtin = e->builtin;
 598                 if (builtin < 0)
 599                         continue;
 600
 601                 table->hook_entry[builtin] += entry->next_offset;
 602                 table->underflow[builtin] += entry->next_offset;
 603         }
 604 }
 605
 606 static struct ipt_entry *prepare_rule_inclusion(struct connman_iptables *table,
 607                                 struct ipt_ip *ip, char *chain_name,
 608                                 char *target_name, struct xtables_target *xt_t,
 609                                 char *match_name, struct xtables_match *xt_m,
 610                                 int *builtin)
 611 {
 612         GList *chain_tail, *chain_head;
 613         struct ipt_entry *new_entry;
 614         struct connman_iptables_entry *head;
 615
 616         chain_head = find_chain_head(table, chain_name);
 617         if (chain_head == NULL)
 618                 return NULL;
 619
 620         chain_tail = find_chain_tail(table, chain_name);
 621         if (chain_tail == NULL)
 622                 return NULL;
 623
 624         new_entry = new_rule(ip, target_name, xt_t, match_name, xt_m);
 625         if (new_entry == NULL)
 626                 return NULL;
 627
 628         update_hooks(table, chain_head, new_entry);
 629
 630         /*
 631          * If the chain is builtin, and does not have any rule,
 632          * then the one that we're inserting is becoming the head
 633          * and thus needs the builtin flag.
 634          */
 635         head = chain_head->data;
 636         if (head->builtin < 0)
 637                 *builtin = -1;
 638         else if (chain_head == chain_tail->prev) {
 639                 *builtin = head->builtin;
 640                 head->builtin = -1;
 641         }
 642
 643         return new_entry;
 644 }
 645
 646 static int connman_iptables_append_rule(struct connman_iptables *table,
 647                                 struct ipt_ip *ip, char *chain_name,
 648                                 char *target_name, struct xtables_target *xt_t,
 649                                 char *match_name, struct xtables_match *xt_m)
 650 {
 651         GList *chain_tail;
 652         struct ipt_entry *new_entry;
 653         int builtin = -1, ret;
 654
 655         chain_tail = find_chain_tail(table, chain_name);
 656         if (chain_tail == NULL)
 657                 return -EINVAL;
 658
 659         new_entry = prepare_rule_inclusion(table, ip, chain_name,
 660                         target_name, xt_t, match_name, xt_m, &builtin);
 661         if (new_entry == NULL)
 662                 return -EINVAL;
 663
 664         ret = connman_add_entry(table, new_entry, chain_tail->prev, builtin);
 665         if (ret < 0)
 666                 g_free(new_entry);
 667
 668         return ret;
 669 }
 670
 671 static int connman_iptables_insert_rule(struct connman_iptables *table,
 672                                 struct ipt_ip *ip, char *chain_name,
 673                                 char *target_name, struct xtables_target *xt_t,
 674                                 char *match_name, struct xtables_match *xt_m)
 675 {
 676         GList *chain_head;
 677         struct ipt_entry *new_entry;
 678         int builtin = -1, ret;
 679
 680         chain_head = find_chain_head(table, chain_name);
 681         if (chain_head == NULL)
 682                 return -EINVAL;
 683
 684         new_entry = prepare_rule_inclusion(table, ip, chain_name,
 685                         target_name, xt_t, match_name, xt_m, &builtin);
 686         if (new_entry == NULL)
 687                 return -EINVAL;
 688
 689         ret = connman_add_entry(table, new_entry, chain_head->next, builtin);
 690         if (ret < 0)
 691                 g_free(new_entry);
 692
 693         return ret;
 694 }
 695
 696 static gboolean is_same_ipt_entry(struct ipt_entry *i_e1,
 697                                         struct ipt_entry *i_e2)
 698 {
 699         if (memcmp(&i_e1->ip, &i_e2->ip, sizeof(struct ipt_ip)) != 0)
 700                 return FALSE;
 701
 702         if (i_e1->target_offset != i_e2->target_offset)
 703                 return FALSE;
 704
 705         if (i_e1->next_offset != i_e2->next_offset)
 706                 return FALSE;
 707
 708         return TRUE;
 709 }
 710
 711 static gboolean is_same_target(struct xt_entry_target *xt_e_t1,
 712                                         struct xt_entry_target *xt_e_t2)
 713 {
 714         if (xt_e_t1 == NULL || xt_e_t2 == NULL)
 715                 return FALSE;
 716
 717         if (strcmp(xt_e_t1->u.user.name, IPT_STANDARD_TARGET) == 0) {
 718                 struct xt_standard_target *xt_s_t1;
 719                 struct xt_standard_target *xt_s_t2;
 720
 721                 xt_s_t1 = (struct xt_standard_target *) xt_e_t1;
 722                 xt_s_t2 = (struct xt_standard_target *) xt_e_t2;
 723
 724                 if (xt_s_t1->verdict != xt_s_t2->verdict)
 725                         return FALSE;
 726         } else {
 727                 if (xt_e_t1->u.target_size != xt_e_t2->u.target_size)
 728                         return FALSE;
 729
 730                 if (strcmp(xt_e_t1->u.user.name, xt_e_t2->u.user.name) != 0)
 731                         return FALSE;
 732         }
 733
 734         return TRUE;
 735 }
 736
 737 static gboolean is_same_match(struct xt_entry_match *xt_e_m1,
 738                                 struct xt_entry_match *xt_e_m2)
 739 {
 740         if (xt_e_m1 == NULL || xt_e_m2 == NULL)
 741                 return FALSE;
 742
 743         if (xt_e_m1->u.match_size != xt_e_m2->u.match_size)
 744                 return FALSE;
 745
 746         if (xt_e_m1->u.user.revision != xt_e_m2->u.user.revision)
 747                 return FALSE;
 748
 749         if (strcmp(xt_e_m1->u.user.name, xt_e_m2->u.user.name) != 0)
 750                 return FALSE;
 751
 752         return TRUE;
 753 }
 754
 755 static int connman_iptables_delete_rule(struct connman_iptables *table,
 756                                 struct ipt_ip *ip, char *chain_name,
 757                                 char *target_name, struct xtables_target *xt_t,
 758                                 char *match_name, struct xtables_match *xt_m)
 759 {
 760         GList *chain_tail, *chain_head, *list;
 761         struct xt_entry_target *xt_e_t = NULL;
 762         struct xt_entry_match *xt_e_m = NULL;
 763         struct connman_iptables_entry *entry;
 764         struct ipt_entry *entry_test;
 765         int builtin, removed;
 766
 767         removed = 0;
 768
 769         chain_head = find_chain_head(table, chain_name);
 770         if (chain_head == NULL)
 771                 return -EINVAL;
 772
 773         chain_tail = find_chain_tail(table, chain_name);
 774         if (chain_tail == NULL)
 775                 return -EINVAL;
 776
 777         if (!xt_t && !xt_m)
 778                 return -EINVAL;
 779
 780         entry_test = new_rule(ip, target_name, xt_t, match_name, xt_m);
 781         if (entry_test == NULL)
 782                 return -EINVAL;
 783
 784         if (xt_t != NULL)
 785                 xt_e_t = ipt_get_target(entry_test);
 786         if (xt_m != NULL)
 787                 xt_e_m = (struct xt_entry_match *)entry_test->elems;
 788
 789         entry = chain_head->data;
 790         builtin = entry->builtin;
 791
 792         if (builtin >= 0)
 793                 list = chain_head;
 794         else
 795                 list = chain_head->next;
 796
 797         for (entry = NULL; list != chain_tail->prev; list = list->next) {
 798                 struct connman_iptables_entry *tmp;
 799                 struct ipt_entry *tmp_e;
 800
 801                 tmp = list->data;
 802                 tmp_e = tmp->entry;
 803
 804                 if (is_same_ipt_entry(entry_test, tmp_e) == FALSE)
 805                         continue;
 806
 807                 if (xt_t != NULL) {
 808                         struct xt_entry_target *tmp_xt_e_t;
 809
 810                         tmp_xt_e_t = ipt_get_target(tmp_e);
 811
 812                         if (!is_same_target(tmp_xt_e_t, xt_e_t))
 813                                 continue;
 814                 }
 815
 816                 if (xt_m != NULL) {
 817                         struct xt_entry_match *tmp_xt_e_m;
 818
 819                         tmp_xt_e_m = (struct xt_entry_match *)tmp_e->elems;
 820
 821                         if (!is_same_match(tmp_xt_e_m, xt_e_m))
 822                                 continue;
 823                 }
 824
 825                 entry = tmp;
 826                 break;
 827         }
 828
 829         if (entry == NULL) {
 830                 g_free(entry_test);
 831                 return -EINVAL;
 832         }
 833
 834         /* We have deleted a rule,
 835          * all references should be bumped accordingly */
 836         if (list->next != NULL)
 837                 update_targets_reference(table, list->next->data,
 838                                                 list->data, TRUE);
 839
 840         removed += remove_table_entry(table, entry);
 841
 842         if (builtin >= 0) {
 843                 list = list->next;
 844                 if (list) {
 845                         entry = list->data;
 846                         entry->builtin = builtin;
 847                 }
 848
 849                 table->underflow[builtin] -= removed;
 850                 for (list = chain_tail; list; list = list->next) {
 851                         entry = list->data;
 852
 853                         builtin = entry->builtin;
 854                         if (builtin < 0)
 855                                 continue;
 856
 857                         table->hook_entry[builtin] -= removed;
 858                         table->underflow[builtin] -= removed;
 859                 }
 860         }
 861
 862         update_offsets(table);
 863
 864         return 0;
 865 }
 866
 867 static struct ipt_replace *connman_iptables_blob(struct connman_iptables *table)
 868 {
 869         struct ipt_replace *r;
 870         GList *list;
 871         struct connman_iptables_entry *e;
 872         unsigned char *entry_index;
 873
 874         r = g_try_malloc0(sizeof(struct ipt_replace) + table->size);
 875         if (r == NULL)
 876                 return NULL;
 877
 878         memset(r, 0, sizeof(*r) + table->size);
 879
 880         r->counters = g_try_malloc0(sizeof(struct xt_counters)
 881                                 * table->old_entries);
 882         if (r->counters == NULL) {
 883                 g_free(r);
 884                 return NULL;
 885         }
 886
 887         strcpy(r->name, table->info->name);
 888         r->num_entries = table->num_entries;
 889         r->size = table->size;
 890
 891         r->num_counters = table->old_entries;
 892         r->valid_hooks  = table->info->valid_hooks;
 893
 894         memcpy(r->hook_entry, table->hook_entry, sizeof(table->hook_entry));
 895         memcpy(r->underflow, table->underflow, sizeof(table->underflow));
 896
 897         entry_index = (unsigned char *)r->entries;
 898         for (list = table->entries; list; list = list->next) {
 899                 e = list->data;
 900
 901                 memcpy(entry_index, e->entry, e->entry->next_offset);
 902                 entry_index += e->entry->next_offset;
 903         }
 904
 905         return r;
 906 }
 907
 908 static void dump_target(struct connman_iptables *table,
 909                                 struct ipt_entry *entry)
 910
 911 {
 912         struct xtables_target *xt_t;
 913         struct xt_entry_target *target;
 914
 915         target = ipt_get_target(entry);
 916
 917         if (!strcmp(target->u.user.name, IPT_STANDARD_TARGET)) {
 918                 struct xt_standard_target *t;
 919
 920                 t = (struct xt_standard_target *)target;
 921
 922                 switch (t->verdict) {
 923                 case XT_RETURN:
 924                         printf("\ttarget RETURN\n");
 925                         break;
 926
 927                 case -NF_ACCEPT - 1:
 928                         printf("\ttarget ACCEPT\n");
 929                         break;
 930
 931                 case -NF_DROP - 1:
 932                         printf("\ttarget DROP\n");
 933                         break;
 934
 935                 case -NF_QUEUE - 1:
 936                         printf("\ttarget QUEUE\n");
 937                         break;
 938
 939                 case -NF_STOP - 1:
 940                         printf("\ttarget STOP\n");
 941                         break;
 942
 943                 default:
 944                         printf("\tJUMP @%p (0x%x)\n",
 945                                 (char*)table->blob_entries->entrytable +
 946                                 t->verdict, t->verdict);
 947                         break;
 948                 }
 949
 950                 xt_t = xtables_find_target(IPT_STANDARD_TARGET,
 951                                                 XTF_LOAD_MUST_SUCCEED);
 952
 953                 if(xt_t->print != NULL)
 954                         xt_t->print(NULL, target, 1);
 955         } else {
 956                 xt_t = xtables_find_target(target->u.user.name, XTF_TRY_LOAD);
 957                 if (xt_t == NULL) {
 958                         printf("\ttarget %s\n", target->u.user.name);
 959                         return;
 960                 }
 961
 962                 if(xt_t->print != NULL) {
 963                         printf("\ttarget ");
 964                         xt_t->print(NULL, target, 1);
 965                         printf("\n");
 966                 }
 967         }
 968 }
 969
 970 static void dump_match(struct connman_iptables *table, struct ipt_entry *entry)
 971 {
 972         struct xtables_match *xt_m;
 973         struct xt_entry_match *match;
 974
 975         if (entry->elems == (unsigned char *)entry + entry->target_offset)
 976                 return;
 977
 978         match = (struct xt_entry_match *) entry->elems;
 979
 980         if (!strlen(match->u.user.name))
 981                 return;
 982
 983         xt_m = xtables_find_match(match->u.user.name, XTF_TRY_LOAD, NULL);
 984         if (xt_m == NULL)
 985                 goto out;
 986
 987         if(xt_m->print != NULL) {
 988                 printf("\tmatch ");
 989                 xt_m->print(NULL, match, 1);
 990                 printf("\n");
 991
 992                 return;
 993         }
 994
 995 out:
 996         printf("\tmatch %s\n", match->u.user.name);
 997
 998 }
 999
1000 static int connman_iptables_dump_entry(struct ipt_entry *entry,
1001                                         struct connman_iptables *table)
1002 {
1003         struct xt_entry_target *target;
1004         unsigned int offset;
1005         int builtin;
1006
1007         offset = (char *)entry - (char *)table->blob_entries->entrytable;
1008         target = ipt_get_target(entry);
1009         builtin = is_hook_entry(table, entry);
1010
1011         if (entry_to_offset(table, entry) + entry->next_offset ==
1012                                         table->blob_entries->size) {
1013                 printf("End of CHAIN 0x%x\n", offset);
1014                 return 0;
1015         }
1016
1017         if (!strcmp(target->u.user.name, IPT_ERROR_TARGET)) {
1018                 printf("USER CHAIN (%s) %p  match %p  target %p  size %d\n",
1019                         target->data, entry, entry->elems,
1020                         (char *)entry + entry->target_offset,
1021                                 entry->next_offset);
1022
1023                 return 0;
1024         } else if (builtin >= 0) {
1025                 printf("CHAIN (%s) %p  match %p  target %p  size %d\n",
1026                         hooknames[builtin], entry, entry->elems,
1027                         (char *)entry + entry->target_offset,
1028                                 entry->next_offset);
1029         } else {
1030                 printf("RULE %p  match %p  target %p  size %d\n", entry,
1031                         entry->elems,
1032                         (char *)entry + entry->target_offset,
1033                                 entry->next_offset);
1034         }
1035
1036         dump_match(table, entry);
1037         dump_target(table, entry);
1038
1039         return 0;
1040 }
1041
1042 static void connman_iptables_dump_hook(struct connman_iptables *table)
1043 {
1044         int i;
1045         printf("hooks: \n");
1046         for (i = 0; i < NF_INET_NUMHOOKS; i++) {
1047                 if ((table->info->valid_hooks & (1 << i)))
1048                         printf("%s entry %p underflow %p (%#x)\n",
1049                                 hooknames[i],
1050                                 table->blob_entries->entrytable +
1051                                                 table->info->hook_entry[i],
1052                                 table->blob_entries->entrytable +
1053                                                 table->info->underflow[i],
1054                                         table->info->underflow[i]);
1055         }
1056 }
1057
1058 static void connman_iptables_dump(struct connman_iptables *table)
1059 {
1060         printf("%s valid_hooks=0x%08x, num_entries=%u, size=%u\n",
1061                 table->info->name,
1062                 table->info->valid_hooks, table->info->num_entries,
1063                 table->info->size);
1064
1065         connman_iptables_dump_hook(table);
1066
1067         ENTRY_ITERATE(table->blob_entries->entrytable,
1068                         table->blob_entries->size,
1069                         connman_iptables_dump_entry, table);
1070
1071 }
1072
1073 static int connman_iptables_get_entries(struct connman_iptables *table)
1074 {
1075         socklen_t entry_size;
1076
1077         entry_size = sizeof(struct ipt_get_entries) + table->info->size;
1078
1079         return getsockopt(table->ipt_sock, IPPROTO_IP, IPT_SO_GET_ENTRIES,
1080                                 table->blob_entries, &entry_size);
1081 }
1082
1083 static int connman_iptables_replace(struct connman_iptables *table,
1084                                         struct ipt_replace *r)
1085 {
1086         return setsockopt(table->ipt_sock, IPPROTO_IP, IPT_SO_SET_REPLACE, r,
1087                          sizeof(*r) + r->size);
1088 }
1089
1090 static void connman_iptables_cleanup(struct connman_iptables *table)
1091 {
1092         GList *list;
1093         struct connman_iptables_entry *entry;
1094
1095         close(table->ipt_sock);
1096
1097         for (list = table->entries; list; list = list->next) {
1098                 entry = list->data;
1099
1100                 g_free(entry->entry);
1101         }
1102
1103         g_free(table->info);
1104         g_free(table->blob_entries);
1105         g_free(table);
1106
1107         xtables_free_opts(1);
1108 }
1109
1110 static int connman_iptables_commit(struct connman_iptables *table)
1111 {
1112         struct ipt_replace *repl;
1113
1114         repl = connman_iptables_blob(table);
1115
1116         return connman_iptables_replace(table, repl);
1117 }
1118
1119 static int add_entry(struct ipt_entry *entry, struct connman_iptables *table)
1120 {
1121         struct ipt_entry *new_entry;
1122         int builtin;
1123
1124         new_entry = g_try_malloc0(entry->next_offset);
1125         if (new_entry == NULL)
1126                 return -ENOMEM;
1127
1128         memcpy(new_entry, entry, entry->next_offset);
1129
1130         builtin = is_hook_entry(table, entry);
1131
1132         return connman_add_entry(table, new_entry, NULL, builtin);
1133 }
1134
1135 static struct connman_iptables *connman_iptables_init(const char *table_name)
1136 {
1137         struct connman_iptables *table = NULL;
1138         char *module = NULL;
1139         socklen_t s;
1140
1141         if (xtables_insmod("ip_tables", NULL, TRUE) != 0)
1142                 goto err;
1143
1144         module = g_strconcat("iptable_", table_name, NULL);
1145         if (module == NULL)
1146                 goto err;
1147
1148         if (xtables_insmod(module, NULL, TRUE) != 0)
1149                 goto err;
1150
1151         g_free(module);
1152
1153         table =  g_try_new0(struct connman_iptables, 1);
1154         if (table == NULL)
1155                 return NULL;
1156
1157         table->info =  g_try_new0(struct ipt_getinfo, 1);
1158         if (table->info == NULL)
1159                 goto err;
1160
1161         table->ipt_sock = socket(AF_INET, SOCK_RAW, IPPROTO_RAW);
1162         if (table->ipt_sock < 0)
1163                 goto err;
1164
1165         s = sizeof(*table->info);
1166         strcpy(table->info->name, table_name);
1167         if (getsockopt(table->ipt_sock, IPPROTO_IP, IPT_SO_GET_INFO,
1168                                                 table->info, &s) < 0)
1169                 goto err;
1170
1171         table->blob_entries = g_try_malloc0(sizeof(struct ipt_get_entries) +
1172                                                 table->info->size);
1173         if (table->blob_entries == NULL)
1174                 goto err;
1175
1176         strcpy(table->blob_entries->name, table_name);
1177         table->blob_entries->size = table->info->size;
1178
1179         if (connman_iptables_get_entries(table) < 0)
1180                 goto err;
1181
1182         table->num_entries = 0;
1183         table->old_entries = table->info->num_entries;
1184         table->size = 0;
1185
1186         memcpy(table->underflow, table->info->underflow,
1187                                 sizeof(table->info->underflow));
1188         memcpy(table->hook_entry, table->info->hook_entry,
1189                                 sizeof(table->info->hook_entry));
1190
1191         ENTRY_ITERATE(table->blob_entries->entrytable,
1192                         table->blob_entries->size,
1193                                 add_entry, table);
1194
1195         return table;
1196
1197 err:
1198         g_free(module);
1199
1200         connman_iptables_cleanup(table);
1201
1202         return NULL;
1203 }
1204
1205 static struct xtables_target *prepare_target(struct connman_iptables *table,
1206                                                         char *target_name)
1207 {
1208         struct xtables_target *xt_t = NULL;
1209         gboolean is_builtin, is_user_defined;
1210         GList *chain_head = NULL;
1211         size_t target_size;
1212
1213         is_builtin = FALSE;
1214         is_user_defined = FALSE;
1215
1216         if (is_builtin_target(target_name))
1217                 is_builtin = TRUE;
1218         else {
1219                 chain_head = find_chain_head(table, target_name);
1220                 if (chain_head != NULL && chain_head->next != NULL)
1221                         is_user_defined = TRUE;
1222         }
1223
1224         if (is_builtin || is_user_defined)
1225                 xt_t = xtables_find_target(IPT_STANDARD_TARGET,
1226                                                 XTF_LOAD_MUST_SUCCEED);
1227         else
1228                 xt_t = xtables_find_target(target_name, XTF_TRY_LOAD);
1229
1230         if (xt_t == NULL)
1231                 return NULL;
1232
1233         target_size = ALIGN(sizeof(struct ipt_entry_target)) + xt_t->size;
1234
1235         xt_t->t = g_try_malloc0(target_size);
1236         if (xt_t->t == NULL)
1237                 return NULL;
1238
1239         xt_t->t->u.target_size = target_size;
1240
1241         if (is_builtin || is_user_defined) {
1242                 struct xt_standard_target *target;
1243
1244                 target = (struct xt_standard_target *)(xt_t->t);
1245                 strcpy(target->target.u.user.name, IPT_STANDARD_TARGET);
1246
1247                 if (is_builtin == TRUE)
1248                         target->verdict = target_to_verdict(target_name);
1249                 else if (is_user_defined == TRUE) {
1250                         struct connman_iptables_entry *target_rule;
1251
1252                         if (chain_head == NULL) {
1253                                 g_free(xt_t->t);
1254                                 return NULL;
1255                         }
1256
1257                         target_rule = chain_head->next->data;
1258                         target->verdict = target_rule->offset;
1259                 }
1260         } else {
1261                 strcpy(xt_t->t->u.user.name, target_name);
1262                 xt_t->t->u.user.revision = xt_t->revision;
1263                 if (xt_t->init != NULL)
1264                         xt_t->init(xt_t->t);
1265         }
1266
1267         return xt_t;
1268 }
1269
1270 static struct option connman_iptables_opts[] = {
1271         {.name = "append",        .has_arg = 1, .val = 'A'},
1272         {.name = "delete",        .has_arg = 1, .val = 'D'},
1273         {.name = "flush-chain",   .has_arg = 1, .val = 'F'},
1274         {.name = "insert",        .has_arg = 1, .val = 'I'},
1275         {.name = "list",          .has_arg = 2, .val = 'L'},
1276         {.name = "new-chain",     .has_arg = 1, .val = 'N'},
1277         {.name = "delete-chain",  .has_arg = 1, .val = 'X'},
1278         {.name = "destination",   .has_arg = 1, .val = 'd'},
1279         {.name = "in-interface",  .has_arg = 1, .val = 'i'},
1280         {.name = "jump",          .has_arg = 1, .val = 'j'},
1281         {.name = "match",         .has_arg = 1, .val = 'm'},
1282         {.name = "out-interface", .has_arg = 1, .val = 'o'},
1283         {.name = "source",        .has_arg = 1, .val = 's'},
1284         {.name = "table",         .has_arg = 1, .val = 't'},
1285         {NULL},
1286 };
1287
1288 struct xtables_globals connman_iptables_globals = {
1289         .option_offset = 0,
1290         .opts = connman_iptables_opts,
1291         .orig_opts = connman_iptables_opts,
1292 };
1293
1294 int main(int argc, char *argv[])
1295 {
1296         struct connman_iptables *table;
1297         struct xtables_match *xt_m;
1298         struct xtables_target *xt_t;
1299         struct ipt_ip ip;
1300         char *table_name, *chain, *new_chain, *match_name, *target_name;
1301         char *delete_chain, *flush_chain;
1302         int c, in_len, out_len;
1303         size_t size;
1304         gboolean dump, invert, delete, insert, delete_rule;
1305         struct in_addr src, dst;
1306
1307         xtables_init_all(&connman_iptables_globals, NFPROTO_IPV4);
1308
1309         dump = FALSE;
1310         invert = FALSE;
1311         delete = FALSE;
1312         insert = FALSE;
1313         delete_rule = FALSE;
1314         table_name = chain = new_chain = match_name = target_name = NULL;
1315         delete_chain = flush_chain = NULL;
1316         memset(&ip, 0, sizeof(struct ipt_ip));
1317         table = NULL;
1318         xt_m = NULL;
1319         xt_t = NULL;
1320
1321         while ((c = getopt_long(argc, argv, "-A:D:F:I:L::N:X:d:i:j:m:o:s:t:",
1322                                 connman_iptables_globals.opts, NULL)) != -1) {
1323                 switch (c) {
1324                 case 'A':
1325                         /* It is either -A, -D or -I at once */
1326                         if (chain)
1327                                 goto out;
1328
1329                         chain = optarg;
1330                         break;
1331
1332                 case 'D':
1333                         /* It is either -A, -D or -I at once */
1334                         if (chain)
1335                                 goto out;
1336
1337                         chain = optarg;
1338                         delete_rule = TRUE;
1339                         break;
1340
1341                 case 'F':
1342                         flush_chain = optarg;
1343                         break;
1344
1345                 case 'I':
1346                         /* It is either -A, -D or -I at once */
1347                         if (chain)
1348                                 goto out;
1349
1350                         chain = optarg;
1351                         insert = TRUE;
1352                         break;
1353
1354                 case 'L':
1355                         dump = true;
1356                         break;
1357
1358                 case 'N':
1359                         new_chain = optarg;
1360                         break;
1361
1362                 case 'X':
1363                         delete = true;
1364                         delete_chain = optarg;
1365                         break;
1366
1367                 case 'd':
1368                         if (!inet_pton(AF_INET, optarg, &dst))
1369                                 break;
1370
1371                         ip.dst = dst;
1372                         inet_pton(AF_INET, "255.255.255.255", &ip.dmsk);
1373
1374                         if (invert)
1375                                 ip.invflags |= IPT_INV_DSTIP;
1376
1377                         break;
1378
1379                 case 'i':
1380                         in_len = strlen(optarg);
1381
1382                         if (in_len + 1 > IFNAMSIZ)
1383                                 break;
1384
1385                         strcpy(ip.iniface, optarg);
1386                         memset(ip.iniface_mask, 0xff, in_len + 1);
1387
1388                         if (invert)
1389                                 ip.invflags |= IPT_INV_VIA_IN;
1390
1391                         break;
1392
1393                 case 'j':
1394                         target_name = optarg;
1395                         break;
1396
1397                 case 'm':
1398                         match_name = optarg;
1399
1400                         xt_m = xtables_find_match(optarg, XTF_LOAD_MUST_SUCCEED, NULL);
1401                         size = ALIGN(sizeof(struct ipt_entry_match)) + xt_m->size;
1402                         xt_m->m = g_try_malloc0(size);
1403                         if (xt_m == NULL)
1404                                 goto out;
1405                         xt_m->m->u.match_size = size;
1406                         strcpy(xt_m->m->u.user.name, xt_m->name);
1407                         xt_m->m->u.user.revision = xt_m->revision;
1408                         if (xt_m->init != NULL)
1409                                 xt_m->init(xt_m->m);
1410                         if (xt_m != xt_m->next) {
1411                                 connman_iptables_globals.opts =
1412                                         xtables_merge_options(
1413 #if XTABLES_VERSION_CODE > 5
1414                                                 connman_iptables_globals.orig_opts,
1415 #endif
1416                                                 connman_iptables_globals.opts,
1417                                                 xt_m->extra_opts,
1418                                                 &xt_m->option_offset);
1419                                 if (connman_iptables_globals.opts == NULL)
1420                                         goto out;
1421                         }
1422
1423                         break;
1424
1425                 case 'o':
1426                         out_len = strlen(optarg);
1427
1428                         if (out_len + 1 > IFNAMSIZ)
1429                                 break;
1430
1431                         strcpy(ip.outiface, optarg);
1432                         memset(ip.outiface_mask, 0xff, out_len + 1);
1433
1434                         if (invert)
1435                                 ip.invflags |= IPT_INV_VIA_OUT;
1436
1437                         break;
1438
1439                 case 's':
1440                         if (!inet_pton(AF_INET, optarg, &src))
1441                                 break;
1442
1443                         ip.src = src;
1444                         inet_pton(AF_INET, "255.255.255.255", &ip.smsk);
1445
1446                         if (invert)
1447                                 ip.invflags |= IPT_INV_SRCIP;
1448
1449                         break;
1450
1451                 case 't':
1452                         table_name = optarg;
1453                         break;
1454
1455                 case 1:
1456                         if (optarg[0] == '!' && optarg[1] == '\0') {
1457                                 if (invert)
1458                                         printf("Consecutive ! not allowed\n");
1459
1460                                 invert = TRUE;
1461                                 optarg[0] = '\0';
1462                                 continue;
1463                         }
1464
1465                         printf("Invalid option\n");
1466
1467                         return -1;
1468
1469                 default:
1470                         if (xt_t == NULL || xt_t->parse == NULL ||
1471                             !xt_t->parse(c - xt_t->option_offset, argv, invert,
1472                                         &xt_t->tflags, NULL, &xt_t->t)) {
1473                                 if (xt_m == NULL || xt_m->parse == NULL)
1474                                         break;
1475
1476                                 xt_m->parse(c - xt_m->option_offset, argv,
1477                                         invert, &xt_m->mflags, NULL, &xt_m->m);
1478                         }
1479
1480                         break;
1481                 }
1482         }
1483
1484         if (table_name == NULL)
1485                 table_name = "filter";
1486
1487         table = connman_iptables_init(table_name);
1488         if (table == NULL)
1489                 return -1;
1490
1491         if (delete) {
1492                 if (delete_chain == NULL)
1493                         goto out;
1494
1495                 printf("Delete chain %s\n", delete_chain);
1496
1497                 connman_iptables_delete_chain(table, delete_chain);
1498
1499                 goto commit;
1500         }
1501
1502         if (flush_chain) {
1503                 printf("Flush chain %s\n", flush_chain);
1504
1505                 connman_iptables_flush_chain(table, flush_chain);
1506
1507                 goto commit;
1508         }
1509
1510         if (dump) {
1511                 connman_iptables_dump(table);
1512
1513                 return 0;
1514         }
1515
1516         if (chain && new_chain)
1517                 return -1;
1518
1519         if (new_chain) {
1520                 printf("New chain %s\n", new_chain);
1521
1522                 connman_iptables_add_chain(table, new_chain);
1523
1524                 goto commit;
1525         }
1526
1527         if (chain) {
1528                 xt_t = prepare_target(table, target_name);
1529                 if (xt_t == NULL)
1530                         goto out;
1531
1532                 connman_iptables_globals.opts =
1533                         xtables_merge_options(
1534 #if XTABLES_VERSION_CODE > 5
1535                                         connman_iptables_globals.orig_opts,
1536 #endif
1537                                         connman_iptables_globals.opts,
1538                                         xt_t->extra_opts,
1539                                         &xt_t->option_offset);
1540                 if (connman_iptables_globals.opts == NULL)
1541                         goto out;
1542
1543                 if (delete_rule == TRUE) {
1544                         printf("Deleting %s to %s (match %s)\n", target_name,
1545                                         chain, match_name);
1546
1547                         connman_iptables_delete_rule(table, &ip, chain,
1548                                         target_name, xt_t, match_name, xt_m);
1549
1550                         goto commit;
1551                 }
1552
1553                 if (insert == TRUE) {
1554                         printf("Inserting %s to %s (match %s)\n", target_name,
1555                                         chain, match_name);
1556
1557                         connman_iptables_insert_rule(table, &ip, chain,
1558                                         target_name, xt_t, match_name, xt_m);
1559                 } else {
1560                         printf("Appending %s to %s (match %s)\n", target_name,
1561                                         chain, match_name);
1562
1563                         connman_iptables_append_rule(table, &ip, chain,
1564                                 target_name, xt_t, match_name, xt_m);
1565                 }
1566         }
1567
1568 commit:
1569
1570         connman_iptables_commit(table);
1571
1572 out:
1573         connman_iptables_cleanup(table);
1574
1575         if (xt_t)
1576                 g_free(xt_t->t);
1577
1578         if (xt_m)
1579                 g_free(xt_m->m);
1580
1581         return 0;
1582 }