tools/iptables-test.c

   1 /*
   2  *  Connection Manager
   3  *
   4  *  Copyright (C) 2007-2011  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 #define XT_OPTION_OFFSET_SCALE 256
  50
  51 /* fn returns 0 to continue iteration */
  52 #define _XT_ENTRY_ITERATE_CONTINUE(type, entries, size, n, fn, args...) \
  53 ({                                                              \
  54         unsigned int __i;                                       \
  55         int __n;                                                \
  56         int __ret = 0;                                          \
  57         type *__entry;                                          \
  58                                                                 \
  59         for (__i = 0, __n = 0; __i < (size);                    \
  60              __i += __entry->next_offset, __n++) {              \
  61                 __entry = (void *)(entries) + __i;              \
  62                 if (__n < n)                                    \
  63                         continue;                               \
  64                                                                 \
  65                 __ret = fn(__entry,  ## args);                  \
  66                 if (__ret != 0)                                 \
  67                         break;                                  \
  68         }                                                       \
  69         __ret;                                                  \
  70 })
  71
  72 /* fn returns 0 to continue iteration */
  73 #define _XT_ENTRY_ITERATE(type, entries, size, fn, args...) \
  74         _XT_ENTRY_ITERATE_CONTINUE(type, entries, size, 0, fn, args)
  75
  76 #define ENTRY_ITERATE(entries, size, fn, args...) \
  77         _XT_ENTRY_ITERATE(struct ipt_entry, entries, size, fn, ## args)
  78
  79 #define MIN_ALIGN (__alignof__(struct ipt_entry))
  80
  81 #define ALIGN(s) (((s) + ((MIN_ALIGN)-1)) & ~((MIN_ALIGN)-1))
  82
  83 struct error_target {
  84         struct xt_entry_target t;
  85         char error[IPT_TABLE_MAXNAMELEN];
  86 };
  87
  88 struct connman_iptables_entry {
  89         int offset;
  90         int builtin;
  91
  92         struct ipt_entry *entry;
  93 };
  94
  95 struct connman_iptables {
  96         int ipt_sock;
  97
  98         struct ipt_getinfo *info;
  99         struct ipt_get_entries *blob_entries;
 100
 101         unsigned int num_entries;
 102         unsigned int old_entries;
 103         unsigned int size;
 104
 105         unsigned int underflow[NF_INET_NUMHOOKS];
 106         unsigned int hook_entry[NF_INET_NUMHOOKS];
 107
 108         GList *entries;
 109 };
 110
 111
 112 static struct ipt_entry *get_entry(struct connman_iptables *table,
 113                                         unsigned int offset)
 114 {
 115         return (struct ipt_entry *)((char *)table->blob_entries->entrytable +
 116                                                                         offset);
 117 }
 118
 119 static int is_hook_entry(struct connman_iptables *table,
 120                                 struct ipt_entry *entry)
 121 {
 122         unsigned int i;
 123
 124         for (i = 0; i < NF_INET_NUMHOOKS; i++) {
 125                 if ((table->info->valid_hooks & (1 << i))
 126                 && get_entry(table, table->info->hook_entry[i]) == entry)
 127                         return i;
 128         }
 129
 130         return -1;
 131 }
 132
 133 static unsigned long entry_to_offset(struct connman_iptables *table,
 134                                         struct ipt_entry *entry)
 135 {
 136         return (void *)entry - (void *)table->blob_entries->entrytable;
 137 }
 138
 139 static int target_to_verdict(char *target_name)
 140 {
 141         if (!strcmp(target_name, LABEL_ACCEPT))
 142                 return -NF_ACCEPT - 1;
 143
 144         if (!strcmp(target_name, LABEL_DROP))
 145                 return -NF_DROP - 1;
 146
 147         if (!strcmp(target_name, LABEL_QUEUE))
 148                 return -NF_QUEUE - 1;
 149
 150         if (!strcmp(target_name, LABEL_RETURN))
 151                 return XT_RETURN;
 152
 153         return 0;
 154 }
 155
 156 static gboolean is_builtin_target(char *target_name)
 157 {
 158         if (!strcmp(target_name, LABEL_ACCEPT) ||
 159                 !strcmp(target_name, LABEL_DROP) ||
 160                 !strcmp(target_name, LABEL_QUEUE) ||
 161                 !strcmp(target_name, LABEL_RETURN))
 162                 return TRUE;
 163
 164         return FALSE;
 165 }
 166
 167 static gboolean is_jump(struct connman_iptables_entry *e)
 168 {
 169         struct xt_entry_target *target;
 170
 171         target = ipt_get_target(e->entry);
 172
 173         if (!strcmp(target->u.user.name, IPT_STANDARD_TARGET)) {
 174                 struct xt_standard_target *t;
 175
 176                 t = (struct xt_standard_target *)target;
 177
 178                 switch (t->verdict) {
 179                 case XT_RETURN:
 180                 case -NF_ACCEPT - 1:
 181                 case -NF_DROP - 1:
 182                 case -NF_QUEUE - 1:
 183                 case -NF_STOP - 1:
 184                         return false;
 185
 186                 default:
 187                         return true;
 188                 }
 189         }
 190
 191         return false;
 192 }
 193
 194 static gboolean is_chain(struct connman_iptables *table,
 195                                 struct connman_iptables_entry *e)
 196 {
 197         struct ipt_entry *entry;
 198         struct xt_entry_target *target;
 199
 200         entry = e->entry;
 201         if (e->builtin >= 0)
 202                 return TRUE;
 203
 204         target = ipt_get_target(entry);
 205         if (!strcmp(target->u.user.name, IPT_ERROR_TARGET))
 206                 return TRUE;
 207
 208         return FALSE;
 209 }
 210
 211 static GList *find_chain_head(struct connman_iptables *table,
 212                                 char *chain_name)
 213 {
 214         GList *list;
 215         struct connman_iptables_entry *head;
 216         struct ipt_entry *entry;
 217         struct xt_entry_target *target;
 218         int builtin;
 219
 220         for (list = table->entries; list; list = list->next) {
 221                 head = list->data;
 222                 entry = head->entry;
 223
 224                 /* Buit-in chain */
 225                 builtin = head->builtin;
 226                 if (builtin >= 0 && !strcmp(hooknames[builtin], chain_name))
 227                         break;
 228
 229                 /* User defined chain */
 230                 target = ipt_get_target(entry);
 231                 if (!strcmp(target->u.user.name, IPT_ERROR_TARGET) &&
 232                     !strcmp((char *)target->data, chain_name))
 233                         break;
 234         }
 235
 236         return list;
 237 }
 238
 239 static GList *find_chain_tail(struct connman_iptables *table,
 240                                 char *chain_name)
 241 {
 242         GList *chain_head, *list;
 243         struct connman_iptables_entry *tail;
 244
 245         chain_head = find_chain_head(table, chain_name);
 246         if (chain_head == NULL)
 247                 return NULL;
 248
 249         /* Then we look for the next chain */
 250         for (list = chain_head->next; list; list = list->next) {
 251                 tail = list->data;
 252
 253                 if (is_chain(table, tail))
 254                         return list;
 255         }
 256
 257         /* Nothing found, we return the table end */
 258         return g_list_last(table->entries);
 259 }
 260
 261 static void update_offsets(struct connman_iptables *table)
 262 {
 263         GList *list, *prev;
 264         struct connman_iptables_entry *entry, *prev_entry;
 265
 266         for (list = table->entries; list; list = list->next) {
 267                 entry = list->data;
 268
 269                 if (list == table->entries) {
 270                         entry->offset = 0;
 271
 272                         continue;
 273                 }
 274
 275                 prev = list->prev;
 276                 prev_entry = prev->data;
 277
 278                 entry->offset = prev_entry->offset +
 279                                         prev_entry->entry->next_offset;
 280         }
 281 }
 282
 283 static void update_targets_reference(struct connman_iptables *table,
 284                                 struct connman_iptables_entry *entry_before,
 285                                 struct connman_iptables_entry *modified_entry,
 286                                 gboolean is_removing)
 287 {
 288         struct connman_iptables_entry *tmp;
 289         struct xt_standard_target *t;
 290         GList *list;
 291         int offset;
 292
 293         offset = modified_entry->entry->next_offset;
 294
 295         for (list = table->entries; list; list = list->next) {
 296                 tmp = list->data;
 297
 298                 if (!is_jump(tmp))
 299                         continue;
 300
 301                 t = (struct xt_standard_target *)ipt_get_target(tmp->entry);
 302
 303                 if (is_removing == TRUE) {
 304                         if (t->verdict >= entry_before->offset)
 305                                 t->verdict -= offset;
 306                 } else {
 307                         if (t->verdict > entry_before->offset)
 308                                 t->verdict += offset;
 309                 }
 310         }
 311 }
 312
 313 static int connman_add_entry(struct connman_iptables *table,
 314                                 struct ipt_entry *entry, GList *before,
 315                                         int builtin)
 316 {
 317         struct connman_iptables_entry *e, *entry_before;
 318
 319         if (table == NULL)
 320                 return -1;
 321
 322         e = g_try_malloc0(sizeof(struct connman_iptables_entry));
 323         if (e == NULL)
 324                 return -1;
 325
 326         e->entry = entry;
 327         e->builtin = builtin;
 328
 329         table->entries = g_list_insert_before(table->entries, before, e);
 330         table->num_entries++;
 331         table->size += entry->next_offset;
 332
 333         if (before == NULL) {
 334                 e->offset = table->size - entry->next_offset;
 335
 336                 return 0;
 337         }
 338
 339         entry_before = before->data;
 340
 341         /*
 342          * We've just appended/insterted a new entry. All references
 343          * should be bumped accordingly.
 344          */
 345         update_targets_reference(table, entry_before, e, FALSE);
 346
 347         update_offsets(table);
 348
 349         return 0;
 350 }
 351
 352 static int remove_table_entry(struct connman_iptables *table,
 353                                         struct connman_iptables_entry *entry)
 354 {
 355         int removed = 0;
 356
 357         table->num_entries--;
 358         table->size -= entry->entry->next_offset;
 359         removed = entry->entry->next_offset;
 360
 361         g_free(entry->entry);
 362
 363         table->entries = g_list_remove(table->entries, entry);
 364
 365         return removed;
 366 }
 367
 368 static int connman_iptables_flush_chain(struct connman_iptables *table,
 369                                                 char *name)
 370 {
 371         GList *chain_head, *chain_tail, *list, *next;
 372         struct connman_iptables_entry *entry;
 373         int builtin, removed = 0;
 374
 375         chain_head = find_chain_head(table, name);
 376         if (chain_head == NULL)
 377                 return -EINVAL;
 378
 379         chain_tail = find_chain_tail(table, name);
 380         if (chain_tail == NULL)
 381                 return -EINVAL;
 382
 383         entry = chain_head->data;
 384         builtin = entry->builtin;
 385
 386         if (builtin >= 0)
 387                 list = chain_head;
 388         else
 389                 list = chain_head->next;
 390
 391         if (list == chain_tail->prev)
 392                 return 0;
 393
 394         while (list != chain_tail->prev) {
 395                 entry = list->data;
 396                 next = g_list_next(list);
 397
 398                 removed += remove_table_entry(table, entry);
 399
 400                 list = next;
 401         }
 402
 403         if (builtin >= 0) {
 404                 struct connman_iptables_entry *e;
 405
 406                 entry = list->data;
 407
 408                 entry->builtin = builtin;
 409
 410                 table->underflow[builtin] -= removed;
 411
 412                 for (list = chain_tail; list; list = list->next) {
 413                         e = list->data;
 414
 415                         builtin = e->builtin;
 416                         if (builtin < 0)
 417                                 continue;
 418
 419                         table->hook_entry[builtin] -= removed;
 420                         table->underflow[builtin] -= removed;
 421                 }
 422         }
 423
 424         update_offsets(table);
 425
 426         return 0;
 427 }
 428
 429 static int connman_iptables_delete_chain(struct connman_iptables *table,
 430                                                 char *name)
 431 {
 432         GList *chain_head, *chain_tail;
 433         struct connman_iptables_entry *entry;
 434
 435         chain_head = find_chain_head(table, name);
 436         if (chain_head == NULL)
 437                 return -EINVAL;
 438
 439         entry = chain_head->data;
 440
 441         /* We cannot remove builtin chain */
 442         if (entry->builtin >= 0)
 443                 return -EINVAL;
 444
 445         chain_tail = find_chain_tail(table, name);
 446         if (chain_tail == NULL)
 447                 return -EINVAL;
 448
 449         /* Chain must be flushed */
 450         if (chain_head->next != chain_tail->prev)
 451                 return -EINVAL;
 452
 453         remove_table_entry(table, entry);
 454
 455         entry = chain_tail->prev->data;
 456         remove_table_entry(table, entry);
 457
 458         update_offsets(table);
 459
 460         return 0;
 461 }
 462
 463 static int connman_iptables_add_chain(struct connman_iptables *table,
 464                                         char *name)
 465 {
 466         GList *last;
 467         struct ipt_entry *entry_head;
 468         struct ipt_entry *entry_return;
 469         struct error_target *error;
 470         struct ipt_standard_target *standard;
 471         u_int16_t entry_head_size, entry_return_size;
 472
 473         last = g_list_last(table->entries);
 474
 475         /*
 476          * An empty chain is composed of:
 477          * - A head entry, with no match and an error target.
 478          *   The error target data is the chain name.
 479          * - A tail entry, with no match and a standard target.
 480          *   The standard target verdict is XT_RETURN (return to the
 481          *   caller).
 482          */
 483
 484         /* head entry */
 485         entry_head_size = sizeof(struct ipt_entry) +
 486                                 sizeof(struct error_target);
 487         entry_head = g_try_malloc0(entry_head_size);
 488         if (entry_head == NULL)
 489                 goto err_head;
 490
 491         memset(entry_head, 0, entry_head_size);
 492
 493         entry_head->target_offset = sizeof(struct ipt_entry);
 494         entry_head->next_offset = entry_head_size;
 495
 496         error = (struct error_target *) entry_head->elems;
 497         strcpy(error->t.u.user.name, IPT_ERROR_TARGET);
 498         error->t.u.user.target_size = ALIGN(sizeof(struct error_target));
 499         strcpy(error->error, name);
 500
 501         if (connman_add_entry(table, entry_head, last, -1) < 0)
 502                 goto err_head;
 503
 504         /* tail entry */
 505         entry_return_size = sizeof(struct ipt_entry) +
 506                                 sizeof(struct ipt_standard_target);
 507         entry_return = g_try_malloc0(entry_return_size);
 508         if (entry_return == NULL)
 509                 goto err;
 510
 511         memset(entry_return, 0, entry_return_size);
 512
 513         entry_return->target_offset = sizeof(struct ipt_entry);
 514         entry_return->next_offset = entry_return_size;
 515
 516         standard = (struct ipt_standard_target *) entry_return->elems;
 517         standard->target.u.user.target_size =
 518                                 ALIGN(sizeof(struct ipt_standard_target));
 519         standard->verdict = XT_RETURN;
 520
 521         if (connman_add_entry(table, entry_return, last, -1) < 0)
 522                 goto err;
 523
 524         return 0;
 525
 526 err:
 527         g_free(entry_return);
 528 err_head:
 529         g_free(entry_head);
 530
 531         return -ENOMEM;
 532 }
 533
 534 static struct ipt_entry *new_rule(struct ipt_ip *ip,
 535                         char *target_name, struct xtables_target *xt_t,
 536                         struct xtables_rule_match *xt_rm)
 537 {
 538         struct xtables_rule_match *tmp_xt_rm;
 539         struct ipt_entry *new_entry;
 540         size_t match_size, target_size;
 541
 542         match_size = 0;
 543         for (tmp_xt_rm = xt_rm; tmp_xt_rm != NULL; tmp_xt_rm = tmp_xt_rm->next)
 544                 match_size += tmp_xt_rm->match->m->u.match_size;
 545
 546         if (xt_t)
 547                 target_size = ALIGN(xt_t->t->u.target_size);
 548         else
 549                 target_size = ALIGN(sizeof(struct xt_standard_target));
 550
 551         new_entry = g_try_malloc0(sizeof(struct ipt_entry) + target_size +
 552                                                                 match_size);
 553         if (new_entry == NULL)
 554                 return NULL;
 555
 556         memcpy(&new_entry->ip, ip, sizeof(struct ipt_ip));
 557
 558         new_entry->target_offset = sizeof(struct ipt_entry) + match_size;
 559         new_entry->next_offset = sizeof(struct ipt_entry) + target_size +
 560                                                                 match_size;
 561
 562         match_size = 0;
 563         for (tmp_xt_rm = xt_rm; tmp_xt_rm != NULL;
 564                                 tmp_xt_rm = tmp_xt_rm->next) {
 565                 memcpy(new_entry->elems + match_size, tmp_xt_rm->match->m,
 566                                         tmp_xt_rm->match->m->u.match_size);
 567                 match_size += tmp_xt_rm->match->m->u.match_size;
 568         }
 569
 570         if (xt_t) {
 571                 struct xt_entry_target *entry_target;
 572
 573                 entry_target = ipt_get_target(new_entry);
 574                 memcpy(entry_target, xt_t->t, target_size);
 575         }
 576
 577         return new_entry;
 578 }
 579
 580 static void update_hooks(struct connman_iptables *table, GList *chain_head,
 581                                 struct ipt_entry *entry)
 582 {
 583         GList *list;
 584         struct connman_iptables_entry *head, *e;
 585         int builtin;
 586
 587         if (chain_head == NULL)
 588                 return;
 589
 590         head = chain_head->data;
 591
 592         builtin = head->builtin;
 593         if (builtin < 0)
 594                 return;
 595
 596         table->underflow[builtin] += entry->next_offset;
 597
 598         for (list = chain_head->next; list; list = list->next) {
 599                 e = list->data;
 600
 601                 builtin = e->builtin;
 602                 if (builtin < 0)
 603                         continue;
 604
 605                 table->hook_entry[builtin] += entry->next_offset;
 606                 table->underflow[builtin] += entry->next_offset;
 607         }
 608 }
 609
 610 static struct ipt_entry *prepare_rule_inclusion(struct connman_iptables *table,
 611                                 struct ipt_ip *ip, char *chain_name,
 612                                 char *target_name, struct xtables_target *xt_t,
 613                                 int *builtin, struct xtables_rule_match *xt_rm)
 614 {
 615         GList *chain_tail, *chain_head;
 616         struct ipt_entry *new_entry;
 617         struct connman_iptables_entry *head;
 618
 619         chain_head = find_chain_head(table, chain_name);
 620         if (chain_head == NULL)
 621                 return NULL;
 622
 623         chain_tail = find_chain_tail(table, chain_name);
 624         if (chain_tail == NULL)
 625                 return NULL;
 626
 627         new_entry = new_rule(ip, target_name, xt_t, xt_rm);
 628         if (new_entry == NULL)
 629                 return NULL;
 630
 631         update_hooks(table, chain_head, new_entry);
 632
 633         /*
 634          * If the chain is builtin, and does not have any rule,
 635          * then the one that we're inserting is becoming the head
 636          * and thus needs the builtin flag.
 637          */
 638         head = chain_head->data;
 639         if (head->builtin < 0)
 640                 *builtin = -1;
 641         else if (chain_head == chain_tail->prev) {
 642                 *builtin = head->builtin;
 643                 head->builtin = -1;
 644         }
 645
 646         return new_entry;
 647 }
 648
 649 static int connman_iptables_append_rule(struct connman_iptables *table,
 650                                 struct ipt_ip *ip, char *chain_name,
 651                                 char *target_name, struct xtables_target *xt_t,
 652                                 struct xtables_rule_match *xt_rm)
 653 {
 654         GList *chain_tail;
 655         struct ipt_entry *new_entry;
 656         int builtin = -1, ret;
 657
 658         chain_tail = find_chain_tail(table, chain_name);
 659         if (chain_tail == NULL)
 660                 return -EINVAL;
 661
 662         new_entry = prepare_rule_inclusion(table, ip, chain_name,
 663                                         target_name, xt_t, &builtin, xt_rm);
 664         if (new_entry == NULL)
 665                 return -EINVAL;
 666
 667         ret = connman_add_entry(table, new_entry, chain_tail->prev, builtin);
 668         if (ret < 0)
 669                 g_free(new_entry);
 670
 671         return ret;
 672 }
 673
 674 static int connman_iptables_insert_rule(struct connman_iptables *table,
 675                                 struct ipt_ip *ip, char *chain_name,
 676                                 char *target_name, struct xtables_target *xt_t,
 677                                 struct xtables_rule_match *xt_rm)
 678 {
 679         GList *chain_head;
 680         struct ipt_entry *new_entry;
 681         int builtin = -1, ret;
 682
 683         chain_head = find_chain_head(table, chain_name);
 684         if (chain_head == NULL)
 685                 return -EINVAL;
 686
 687         new_entry = prepare_rule_inclusion(table, ip, chain_name,
 688                                         target_name, xt_t, &builtin, xt_rm);
 689         if (new_entry == NULL)
 690                 return -EINVAL;
 691
 692         ret = connman_add_entry(table, new_entry, chain_head->next, builtin);
 693         if (ret < 0)
 694                 g_free(new_entry);
 695
 696         return ret;
 697 }
 698
 699 static gboolean is_same_ipt_entry(struct ipt_entry *i_e1,
 700                                         struct ipt_entry *i_e2)
 701 {
 702         if (memcmp(&i_e1->ip, &i_e2->ip, sizeof(struct ipt_ip)) != 0)
 703                 return FALSE;
 704
 705         if (i_e1->target_offset != i_e2->target_offset)
 706                 return FALSE;
 707
 708         if (i_e1->next_offset != i_e2->next_offset)
 709                 return FALSE;
 710
 711         return TRUE;
 712 }
 713
 714 static gboolean is_same_target(struct xt_entry_target *xt_e_t1,
 715                                         struct xt_entry_target *xt_e_t2)
 716 {
 717         if (xt_e_t1 == NULL || xt_e_t2 == NULL)
 718                 return FALSE;
 719
 720         if (strcmp(xt_e_t1->u.user.name, IPT_STANDARD_TARGET) == 0) {
 721                 struct xt_standard_target *xt_s_t1;
 722                 struct xt_standard_target *xt_s_t2;
 723
 724                 xt_s_t1 = (struct xt_standard_target *) xt_e_t1;
 725                 xt_s_t2 = (struct xt_standard_target *) xt_e_t2;
 726
 727                 if (xt_s_t1->verdict != xt_s_t2->verdict)
 728                         return FALSE;
 729         } else {
 730                 if (xt_e_t1->u.target_size != xt_e_t2->u.target_size)
 731                         return FALSE;
 732
 733                 if (strcmp(xt_e_t1->u.user.name, xt_e_t2->u.user.name) != 0)
 734                         return FALSE;
 735         }
 736
 737         return TRUE;
 738 }
 739
 740 static gboolean is_same_match(struct xt_entry_match *xt_e_m1,
 741                                 struct xt_entry_match *xt_e_m2)
 742 {
 743         if (xt_e_m1 == NULL || xt_e_m2 == NULL)
 744                 return FALSE;
 745
 746         if (xt_e_m1->u.match_size != xt_e_m2->u.match_size)
 747                 return FALSE;
 748
 749         if (xt_e_m1->u.user.revision != xt_e_m2->u.user.revision)
 750                 return FALSE;
 751
 752         if (strcmp(xt_e_m1->u.user.name, xt_e_m2->u.user.name) != 0)
 753                 return FALSE;
 754
 755         return TRUE;
 756 }
 757
 758 static int connman_iptables_delete_rule(struct connman_iptables *table,
 759                                 struct ipt_ip *ip, char *chain_name,
 760                                 char *target_name, struct xtables_target *xt_t,
 761                                 struct xtables_match *xt_m,
 762                                 struct xtables_rule_match *xt_rm)
 763 {
 764         GList *chain_tail, *chain_head, *list;
 765         struct xt_entry_target *xt_e_t = NULL;
 766         struct xt_entry_match *xt_e_m = NULL;
 767         struct connman_iptables_entry *entry;
 768         struct ipt_entry *entry_test;
 769         int builtin, removed;
 770
 771         removed = 0;
 772
 773         chain_head = find_chain_head(table, chain_name);
 774         if (chain_head == NULL)
 775                 return -EINVAL;
 776
 777         chain_tail = find_chain_tail(table, chain_name);
 778         if (chain_tail == NULL)
 779                 return -EINVAL;
 780
 781         if (!xt_t && !xt_m)
 782                 return -EINVAL;
 783
 784         entry_test = new_rule(ip, target_name, xt_t, xt_rm);
 785         if (entry_test == NULL)
 786                 return -EINVAL;
 787
 788         if (xt_t != NULL)
 789                 xt_e_t = ipt_get_target(entry_test);
 790         if (xt_m != NULL)
 791                 xt_e_m = (struct xt_entry_match *)entry_test->elems;
 792
 793         entry = chain_head->data;
 794         builtin = entry->builtin;
 795
 796         if (builtin >= 0)
 797                 list = chain_head;
 798         else
 799                 list = chain_head->next;
 800
 801         for (entry = NULL; list != chain_tail->prev; list = list->next) {
 802                 struct connman_iptables_entry *tmp;
 803                 struct ipt_entry *tmp_e;
 804
 805                 tmp = list->data;
 806                 tmp_e = tmp->entry;
 807
 808                 if (is_same_ipt_entry(entry_test, tmp_e) == FALSE)
 809                         continue;
 810
 811                 if (xt_t != NULL) {
 812                         struct xt_entry_target *tmp_xt_e_t;
 813
 814                         tmp_xt_e_t = ipt_get_target(tmp_e);
 815
 816                         if (!is_same_target(tmp_xt_e_t, xt_e_t))
 817                                 continue;
 818                 }
 819
 820                 if (xt_m != NULL) {
 821                         struct xt_entry_match *tmp_xt_e_m;
 822
 823                         tmp_xt_e_m = (struct xt_entry_match *)tmp_e->elems;
 824
 825                         if (!is_same_match(tmp_xt_e_m, xt_e_m))
 826                                 continue;
 827                 }
 828
 829                 entry = tmp;
 830                 break;
 831         }
 832
 833         if (entry == NULL) {
 834                 g_free(entry_test);
 835                 return -EINVAL;
 836         }
 837
 838         /* We have deleted a rule,
 839          * all references should be bumped accordingly */
 840         if (list->next != NULL)
 841                 update_targets_reference(table, list->next->data,
 842                                                 list->data, TRUE);
 843
 844         removed += remove_table_entry(table, entry);
 845
 846         if (builtin >= 0) {
 847                 list = list->next;
 848                 if (list) {
 849                         entry = list->data;
 850                         entry->builtin = builtin;
 851                 }
 852
 853                 table->underflow[builtin] -= removed;
 854                 for (list = chain_tail; list; list = list->next) {
 855                         entry = list->data;
 856
 857                         builtin = entry->builtin;
 858                         if (builtin < 0)
 859                                 continue;
 860
 861                         table->hook_entry[builtin] -= removed;
 862                         table->underflow[builtin] -= removed;
 863                 }
 864         }
 865
 866         update_offsets(table);
 867
 868         return 0;
 869 }
 870
 871 static int connman_iptables_change_policy(struct connman_iptables *table,
 872                                                 char *chain_name, char *policy)
 873 {
 874         GList *chain_head;
 875         struct connman_iptables_entry *entry;
 876         struct xt_entry_target *target;
 877         struct xt_standard_target *t;
 878         int verdict;
 879
 880         verdict = target_to_verdict(policy);
 881         if (verdict == 0)
 882                 return -EINVAL;
 883
 884         chain_head = find_chain_head(table, chain_name);
 885         if (chain_head == NULL)
 886                 return -EINVAL;
 887
 888         entry = chain_head->data;
 889         if (entry->builtin < 0)
 890                 return -EINVAL;
 891
 892         target = ipt_get_target(entry->entry);
 893
 894         t = (struct xt_standard_target *)target;
 895         t->verdict = verdict;
 896
 897         return 0;
 898 }
 899
 900 static struct ipt_replace *connman_iptables_blob(struct connman_iptables *table)
 901 {
 902         struct ipt_replace *r;
 903         GList *list;
 904         struct connman_iptables_entry *e;
 905         unsigned char *entry_index;
 906
 907         r = g_try_malloc0(sizeof(struct ipt_replace) + table->size);
 908         if (r == NULL)
 909                 return NULL;
 910
 911         memset(r, 0, sizeof(*r) + table->size);
 912
 913         r->counters = g_try_malloc0(sizeof(struct xt_counters)
 914                                 * table->old_entries);
 915         if (r->counters == NULL) {
 916                 g_free(r);
 917                 return NULL;
 918         }
 919
 920         strcpy(r->name, table->info->name);
 921         r->num_entries = table->num_entries;
 922         r->size = table->size;
 923
 924         r->num_counters = table->old_entries;
 925         r->valid_hooks  = table->info->valid_hooks;
 926
 927         memcpy(r->hook_entry, table->hook_entry, sizeof(table->hook_entry));
 928         memcpy(r->underflow, table->underflow, sizeof(table->underflow));
 929
 930         entry_index = (unsigned char *)r->entries;
 931         for (list = table->entries; list; list = list->next) {
 932                 e = list->data;
 933
 934                 memcpy(entry_index, e->entry, e->entry->next_offset);
 935                 entry_index += e->entry->next_offset;
 936         }
 937
 938         return r;
 939 }
 940
 941 static void dump_target(struct connman_iptables *table,
 942                                 struct ipt_entry *entry)
 943
 944 {
 945         struct xtables_target *xt_t;
 946         struct xt_entry_target *target;
 947
 948         target = ipt_get_target(entry);
 949
 950         if (!strcmp(target->u.user.name, IPT_STANDARD_TARGET)) {
 951                 struct xt_standard_target *t;
 952
 953                 t = (struct xt_standard_target *)target;
 954
 955                 switch (t->verdict) {
 956                 case XT_RETURN:
 957                         printf("\ttarget RETURN\n");
 958                         break;
 959
 960                 case -NF_ACCEPT - 1:
 961                         printf("\ttarget ACCEPT\n");
 962                         break;
 963
 964                 case -NF_DROP - 1:
 965                         printf("\ttarget DROP\n");
 966                         break;
 967
 968                 case -NF_QUEUE - 1:
 969                         printf("\ttarget QUEUE\n");
 970                         break;
 971
 972                 case -NF_STOP - 1:
 973                         printf("\ttarget STOP\n");
 974                         break;
 975
 976                 default:
 977                         printf("\tJUMP @%p (0x%x)\n",
 978                                 (char*)table->blob_entries->entrytable +
 979                                 t->verdict, t->verdict);
 980                         break;
 981                 }
 982
 983                 xt_t = xtables_find_target(IPT_STANDARD_TARGET,
 984                                                 XTF_LOAD_MUST_SUCCEED);
 985
 986                 if(xt_t->print != NULL)
 987                         xt_t->print(NULL, target, 1);
 988         } else {
 989                 xt_t = xtables_find_target(target->u.user.name, XTF_TRY_LOAD);
 990                 if (xt_t == NULL) {
 991                         printf("\ttarget %s\n", target->u.user.name);
 992                         return;
 993                 }
 994
 995                 if(xt_t->print != NULL) {
 996                         printf("\ttarget ");
 997                         xt_t->print(NULL, target, 1);
 998                         printf("\n");
 999                 }
1000         }
1001 }
1002
1003 static void dump_match(struct connman_iptables *table, struct ipt_entry *entry)
1004 {
1005         struct xtables_match *xt_m;
1006         struct xt_entry_match *match;
1007
1008         if (entry->elems == (unsigned char *)entry + entry->target_offset)
1009                 return;
1010
1011         match = (struct xt_entry_match *) entry->elems;
1012
1013         if (!strlen(match->u.user.name))
1014                 return;
1015
1016         xt_m = xtables_find_match(match->u.user.name, XTF_TRY_LOAD, NULL);
1017         if (xt_m == NULL)
1018                 goto out;
1019
1020         if(xt_m->print != NULL) {
1021                 printf("\tmatch ");
1022                 xt_m->print(NULL, match, 1);
1023                 printf("\n");
1024
1025                 return;
1026         }
1027
1028 out:
1029         printf("\tmatch %s\n", match->u.user.name);
1030
1031 }
1032
1033 static int connman_iptables_dump_entry(struct ipt_entry *entry,
1034                                         struct connman_iptables *table)
1035 {
1036         struct xt_entry_target *target;
1037         unsigned int offset;
1038         int builtin;
1039
1040         offset = (char *)entry - (char *)table->blob_entries->entrytable;
1041         target = ipt_get_target(entry);
1042         builtin = is_hook_entry(table, entry);
1043
1044         if (entry_to_offset(table, entry) + entry->next_offset ==
1045                                         table->blob_entries->size) {
1046                 printf("End of CHAIN 0x%x\n", offset);
1047                 return 0;
1048         }
1049
1050         if (!strcmp(target->u.user.name, IPT_ERROR_TARGET)) {
1051                 printf("USER CHAIN (%s) %p  match %p  target %p  size %d\n",
1052                         target->data, entry, entry->elems,
1053                         (char *)entry + entry->target_offset,
1054                                 entry->next_offset);
1055
1056                 return 0;
1057         } else if (builtin >= 0) {
1058                 printf("CHAIN (%s) %p  match %p  target %p  size %d\n",
1059                         hooknames[builtin], entry, entry->elems,
1060                         (char *)entry + entry->target_offset,
1061                                 entry->next_offset);
1062         } else {
1063                 printf("RULE %p  match %p  target %p  size %d\n", entry,
1064                         entry->elems,
1065                         (char *)entry + entry->target_offset,
1066                                 entry->next_offset);
1067         }
1068
1069         dump_match(table, entry);
1070         dump_target(table, entry);
1071
1072         return 0;
1073 }
1074
1075 static void connman_iptables_dump_hook(struct connman_iptables *table)
1076 {
1077         int i;
1078         printf("hooks: \n");
1079         for (i = 0; i < NF_INET_NUMHOOKS; i++) {
1080                 if ((table->info->valid_hooks & (1 << i)))
1081                         printf("%s entry %p underflow %p (%#x)\n",
1082                                 hooknames[i],
1083                                 table->blob_entries->entrytable +
1084                                                 table->info->hook_entry[i],
1085                                 table->blob_entries->entrytable +
1086                                                 table->info->underflow[i],
1087                                         table->info->underflow[i]);
1088         }
1089 }
1090
1091 static void connman_iptables_dump(struct connman_iptables *table)
1092 {
1093         printf("%s valid_hooks=0x%08x, num_entries=%u, size=%u\n",
1094                 table->info->name,
1095                 table->info->valid_hooks, table->info->num_entries,
1096                 table->info->size);
1097
1098         connman_iptables_dump_hook(table);
1099
1100         ENTRY_ITERATE(table->blob_entries->entrytable,
1101                         table->blob_entries->size,
1102                         connman_iptables_dump_entry, table);
1103
1104 }
1105
1106 static int connman_iptables_get_entries(struct connman_iptables *table)
1107 {
1108         socklen_t entry_size;
1109
1110         entry_size = sizeof(struct ipt_get_entries) + table->info->size;
1111
1112         return getsockopt(table->ipt_sock, IPPROTO_IP, IPT_SO_GET_ENTRIES,
1113                                 table->blob_entries, &entry_size);
1114 }
1115
1116 static int connman_iptables_replace(struct connman_iptables *table,
1117                                         struct ipt_replace *r)
1118 {
1119         return setsockopt(table->ipt_sock, IPPROTO_IP, IPT_SO_SET_REPLACE, r,
1120                          sizeof(*r) + r->size);
1121 }
1122
1123 static void connman_iptables_cleanup(struct connman_iptables *table)
1124 {
1125         GList *list;
1126         struct connman_iptables_entry *entry;
1127
1128         close(table->ipt_sock);
1129
1130         for (list = table->entries; list; list = list->next) {
1131                 entry = list->data;
1132
1133                 g_free(entry->entry);
1134         }
1135
1136         g_free(table->info);
1137         g_free(table->blob_entries);
1138         g_free(table);
1139
1140         xtables_free_opts(1);
1141 }
1142
1143 static int connman_iptables_commit(struct connman_iptables *table)
1144 {
1145         struct ipt_replace *repl;
1146
1147         repl = connman_iptables_blob(table);
1148
1149         return connman_iptables_replace(table, repl);
1150 }
1151
1152 static int add_entry(struct ipt_entry *entry, struct connman_iptables *table)
1153 {
1154         struct ipt_entry *new_entry;
1155         int builtin;
1156
1157         new_entry = g_try_malloc0(entry->next_offset);
1158         if (new_entry == NULL)
1159                 return -ENOMEM;
1160
1161         memcpy(new_entry, entry, entry->next_offset);
1162
1163         builtin = is_hook_entry(table, entry);
1164
1165         return connman_add_entry(table, new_entry, NULL, builtin);
1166 }
1167
1168 static struct connman_iptables *connman_iptables_init(const char *table_name)
1169 {
1170         struct connman_iptables *table = NULL;
1171         char *module = NULL;
1172         socklen_t s;
1173
1174         if (xtables_insmod("ip_tables", NULL, TRUE) != 0)
1175                 goto err;
1176
1177         module = g_strconcat("iptable_", table_name, NULL);
1178         if (module == NULL)
1179                 goto err;
1180
1181         if (xtables_insmod(module, NULL, TRUE) != 0)
1182                 goto err;
1183
1184         g_free(module);
1185         module = NULL;
1186
1187         table =  g_try_new0(struct connman_iptables, 1);
1188         if (table == NULL)
1189                 return NULL;
1190
1191         table->info =  g_try_new0(struct ipt_getinfo, 1);
1192         if (table->info == NULL)
1193                 goto err;
1194
1195         table->ipt_sock = socket(AF_INET, SOCK_RAW | SOCK_CLOEXEC, IPPROTO_RAW);
1196         if (table->ipt_sock < 0)
1197                 goto err;
1198
1199         s = sizeof(*table->info);
1200         strcpy(table->info->name, table_name);
1201         if (getsockopt(table->ipt_sock, IPPROTO_IP, IPT_SO_GET_INFO,
1202                                                 table->info, &s) < 0)
1203                 goto err;
1204
1205         table->blob_entries = g_try_malloc0(sizeof(struct ipt_get_entries) +
1206                                                 table->info->size);
1207         if (table->blob_entries == NULL)
1208                 goto err;
1209
1210         strcpy(table->blob_entries->name, table_name);
1211         table->blob_entries->size = table->info->size;
1212
1213         if (connman_iptables_get_entries(table) < 0)
1214                 goto err;
1215
1216         table->num_entries = 0;
1217         table->old_entries = table->info->num_entries;
1218         table->size = 0;
1219
1220         memcpy(table->underflow, table->info->underflow,
1221                                 sizeof(table->info->underflow));
1222         memcpy(table->hook_entry, table->info->hook_entry,
1223                                 sizeof(table->info->hook_entry));
1224
1225         ENTRY_ITERATE(table->blob_entries->entrytable,
1226                         table->blob_entries->size,
1227                                 add_entry, table);
1228
1229         return table;
1230
1231 err:
1232         g_free(module);
1233
1234         connman_iptables_cleanup(table);
1235
1236         return NULL;
1237 }
1238
1239 static struct option connman_iptables_opts[] = {
1240         {.name = "append",        .has_arg = 1, .val = 'A'},
1241         {.name = "delete",        .has_arg = 1, .val = 'D'},
1242         {.name = "flush-chain",   .has_arg = 1, .val = 'F'},
1243         {.name = "insert",        .has_arg = 1, .val = 'I'},
1244         {.name = "list",          .has_arg = 2, .val = 'L'},
1245         {.name = "new-chain",     .has_arg = 1, .val = 'N'},
1246         {.name = "policy",        .has_arg = 1, .val = 'P'},
1247         {.name = "delete-chain",  .has_arg = 1, .val = 'X'},
1248         {.name = "destination",   .has_arg = 1, .val = 'd'},
1249         {.name = "in-interface",  .has_arg = 1, .val = 'i'},
1250         {.name = "jump",          .has_arg = 1, .val = 'j'},
1251         {.name = "match",         .has_arg = 1, .val = 'm'},
1252         {.name = "out-interface", .has_arg = 1, .val = 'o'},
1253         {.name = "source",        .has_arg = 1, .val = 's'},
1254         {.name = "table",         .has_arg = 1, .val = 't'},
1255         {NULL},
1256 };
1257
1258 struct xtables_globals connman_iptables_globals = {
1259         .option_offset = 0,
1260         .opts = connman_iptables_opts,
1261         .orig_opts = connman_iptables_opts,
1262 };
1263
1264 static struct xtables_target *prepare_target(struct connman_iptables *table,
1265                                                         char *target_name)
1266 {
1267         struct xtables_target *xt_t = NULL;
1268         gboolean is_builtin, is_user_defined;
1269         GList *chain_head = NULL;
1270         size_t target_size;
1271
1272         is_builtin = FALSE;
1273         is_user_defined = FALSE;
1274
1275         if (is_builtin_target(target_name))
1276                 is_builtin = TRUE;
1277         else {
1278                 chain_head = find_chain_head(table, target_name);
1279                 if (chain_head != NULL && chain_head->next != NULL)
1280                         is_user_defined = TRUE;
1281         }
1282
1283         if (is_builtin || is_user_defined)
1284                 xt_t = xtables_find_target(IPT_STANDARD_TARGET,
1285                                                 XTF_LOAD_MUST_SUCCEED);
1286         else
1287                 xt_t = xtables_find_target(target_name, XTF_TRY_LOAD);
1288
1289         if (xt_t == NULL)
1290                 return NULL;
1291
1292         target_size = ALIGN(sizeof(struct ipt_entry_target)) + xt_t->size;
1293
1294         xt_t->t = g_try_malloc0(target_size);
1295         if (xt_t->t == NULL)
1296                 return NULL;
1297
1298         xt_t->t->u.target_size = target_size;
1299
1300         if (is_builtin || is_user_defined) {
1301                 struct xt_standard_target *target;
1302
1303                 target = (struct xt_standard_target *)(xt_t->t);
1304                 strcpy(target->target.u.user.name, IPT_STANDARD_TARGET);
1305
1306                 if (is_builtin == TRUE)
1307                         target->verdict = target_to_verdict(target_name);
1308                 else if (is_user_defined == TRUE) {
1309                         struct connman_iptables_entry *target_rule;
1310
1311                         if (chain_head == NULL) {
1312                                 g_free(xt_t->t);
1313                                 return NULL;
1314                         }
1315
1316                         target_rule = chain_head->next->data;
1317                         target->verdict = target_rule->offset;
1318                 }
1319         } else {
1320                 strcpy(xt_t->t->u.user.name, target_name);
1321                 xt_t->t->u.user.revision = xt_t->revision;
1322                 if (xt_t->init != NULL)
1323                         xt_t->init(xt_t->t);
1324         }
1325
1326 #if XTABLES_VERSION_CODE > 5
1327         if (xt_t->x6_options != NULL)
1328                 connman_iptables_globals.opts =
1329                         xtables_options_xfrm(
1330                                 connman_iptables_globals.orig_opts,
1331
1332                                 connman_iptables_globals.opts,
1333                                 xt_t->x6_options,
1334                                 &xt_t->option_offset);
1335         else
1336 #endif
1337                 connman_iptables_globals.opts =
1338                         xtables_merge_options(
1339 #if XTABLES_VERSION_CODE > 5
1340                                 connman_iptables_globals.orig_opts,
1341 #endif
1342                                 connman_iptables_globals.opts,
1343                                 xt_t->extra_opts,
1344                                 &xt_t->option_offset);
1345
1346         if (connman_iptables_globals.opts == NULL) {
1347                 g_free(xt_t->t);
1348                 xt_t = NULL;
1349         }
1350
1351         return xt_t;
1352 }
1353
1354 static struct xtables_match *prepare_matches(struct connman_iptables *table,
1355                         struct xtables_rule_match **xt_rm, char *match_name)
1356 {
1357         struct xtables_match *xt_m;
1358         size_t match_size;
1359
1360         if (match_name == NULL)
1361                 return NULL;
1362
1363         xt_m = xtables_find_match(match_name, XTF_LOAD_MUST_SUCCEED, xt_rm);
1364         match_size = ALIGN(sizeof(struct ipt_entry_match)) + xt_m->size;
1365
1366         xt_m->m = g_try_malloc0(match_size);
1367         if (xt_m->m == NULL)
1368                 return NULL;
1369
1370         xt_m->m->u.match_size = match_size;
1371         strcpy(xt_m->m->u.user.name, xt_m->name);
1372         xt_m->m->u.user.revision = xt_m->revision;
1373
1374         if (xt_m->init != NULL)
1375                 xt_m->init(xt_m->m);
1376
1377         if (xt_m == xt_m->next)
1378                 goto done;
1379
1380 #if XTABLES_VERSION_CODE > 5
1381         if (xt_m->x6_options != NULL)
1382                 connman_iptables_globals.opts =
1383                         xtables_options_xfrm(
1384                                 connman_iptables_globals.orig_opts,
1385                                 connman_iptables_globals.opts,
1386                                 xt_m->x6_options,
1387                                 &xt_m->option_offset);
1388         else
1389 #endif
1390                 connman_iptables_globals.opts =
1391                         xtables_merge_options(
1392 #if XTABLES_VERSION_CODE > 5
1393                                 connman_iptables_globals.orig_opts,
1394 #endif
1395                                 connman_iptables_globals.opts,
1396                                 xt_m->extra_opts,
1397                                 &xt_m->option_offset);
1398
1399         if (connman_iptables_globals.opts == NULL) {
1400                 g_free(xt_m->m);
1401                 xt_m = NULL;
1402         }
1403
1404 done:
1405         return xt_m;
1406 }
1407
1408 int main(int argc, char *argv[])
1409 {
1410         struct connman_iptables *table;
1411         struct xtables_rule_match *xt_rm, *tmp_xt_rm;
1412         struct xtables_match *xt_m, *xt_m_t;
1413         struct xtables_target *xt_t;
1414         struct ipt_ip ip;
1415         char *table_name, *chain, *new_chain, *match_name, *target_name;
1416         char *delete_chain, *flush_chain, *policy;
1417         int c, in_len, out_len;
1418         gboolean dump, invert, delete, insert, delete_rule;
1419         struct in_addr src, dst;
1420
1421         xtables_init_all(&connman_iptables_globals, NFPROTO_IPV4);
1422
1423         dump = FALSE;
1424         invert = FALSE;
1425         delete = FALSE;
1426         insert = FALSE;
1427         delete_rule = FALSE;
1428         table_name = chain = new_chain = match_name = target_name = NULL;
1429         delete_chain = flush_chain = policy = NULL;
1430         memset(&ip, 0, sizeof(struct ipt_ip));
1431         table = NULL;
1432         xt_rm = NULL;
1433         xt_m = NULL;
1434         xt_t = NULL;
1435
1436         /* extension's options will generate false-positives errors */
1437         opterr = 0;
1438
1439         while ((c = getopt_long(argc, argv, "-A:D:F:I:L::N:P:X:d:i:j:m:o:s:t:",
1440                                 connman_iptables_globals.opts, NULL)) != -1) {
1441                 switch (c) {
1442                 case 'A':
1443                         /* It is either -A, -D or -I at once */
1444                         if (chain)
1445                                 goto out;
1446
1447                         chain = optarg;
1448                         break;
1449
1450                 case 'D':
1451                         /* It is either -A, -D or -I at once */
1452                         if (chain)
1453                                 goto out;
1454
1455                         chain = optarg;
1456                         delete_rule = TRUE;
1457                         break;
1458
1459                 case 'F':
1460                         flush_chain = optarg;
1461                         break;
1462
1463                 case 'I':
1464                         /* It is either -A, -D or -I at once */
1465                         if (chain)
1466                                 goto out;
1467
1468                         chain = optarg;
1469                         insert = TRUE;
1470                         break;
1471
1472                 case 'L':
1473                         dump = true;
1474                         break;
1475
1476                 case 'N':
1477                         new_chain = optarg;
1478                         break;
1479
1480                 case 'P':
1481                         chain = optarg;
1482                         if (optind < argc)
1483                                 policy = argv[optind++];
1484                         else
1485                                 goto out;
1486
1487                         break;
1488
1489                 case 'X':
1490                         delete = true;
1491                         delete_chain = optarg;
1492                         break;
1493
1494                 case 'd':
1495                         if (!inet_pton(AF_INET, optarg, &dst))
1496                                 break;
1497
1498                         ip.dst = dst;
1499                         inet_pton(AF_INET, "255.255.255.255", &ip.dmsk);
1500
1501                         if (invert)
1502                                 ip.invflags |= IPT_INV_DSTIP;
1503
1504                         break;
1505
1506                 case 'i':
1507                         in_len = strlen(optarg);
1508
1509                         if (in_len + 1 > IFNAMSIZ)
1510                                 break;
1511
1512                         strcpy(ip.iniface, optarg);
1513                         memset(ip.iniface_mask, 0xff, in_len + 1);
1514
1515                         if (invert)
1516                                 ip.invflags |= IPT_INV_VIA_IN;
1517
1518                         break;
1519
1520                 case 'j':
1521                         target_name = optarg;
1522                         xt_t = prepare_target(table, target_name);
1523                         if (xt_t == NULL)
1524                                 goto out;
1525
1526                         break;
1527
1528                 case 'm':
1529                         match_name = optarg;
1530                         xt_m = prepare_matches(table, &xt_rm, match_name);
1531                         if (xt_m == NULL)
1532                                 goto out;
1533
1534                         break;
1535
1536                 case 'o':
1537                         out_len = strlen(optarg);
1538
1539                         if (out_len + 1 > IFNAMSIZ)
1540                                 break;
1541
1542                         strcpy(ip.outiface, optarg);
1543                         memset(ip.outiface_mask, 0xff, out_len + 1);
1544
1545                         if (invert)
1546                                 ip.invflags |= IPT_INV_VIA_OUT;
1547
1548                         break;
1549
1550                 case 's':
1551                         if (!inet_pton(AF_INET, optarg, &src))
1552                                 break;
1553
1554                         ip.src = src;
1555                         inet_pton(AF_INET, "255.255.255.255", &ip.smsk);
1556
1557                         if (invert)
1558                                 ip.invflags |= IPT_INV_SRCIP;
1559
1560                         break;
1561
1562                 case 't':
1563                         table_name = optarg;
1564
1565                         table = connman_iptables_init(table_name);
1566                         if (table == NULL)
1567                                 return -1;
1568
1569                         break;
1570
1571                 case 1:
1572                         if (optarg[0] == '!' && optarg[1] == '\0') {
1573                                 if (invert)
1574                                         printf("Consecutive ! not allowed\n");
1575
1576                                 invert = TRUE;
1577                                 optarg[0] = '\0';
1578                                 continue;
1579                         }
1580
1581                         printf("Invalid option\n");
1582
1583                         return -1;
1584
1585                 default:
1586 #if XTABLES_VERSION_CODE > 5
1587                         if (xt_t != NULL && (xt_t->x6_parse != NULL ||
1588                                                 xt_t->parse != NULL) &&
1589                                         (c >= (int) xt_t->option_offset &&
1590                                         c < (int) xt_t->option_offset +
1591                                         XT_OPTION_OFFSET_SCALE)) {
1592                                 xtables_option_tpcall(c, argv,
1593                                                         invert, xt_t, NULL);
1594
1595                                 break;
1596                         }
1597
1598                         for (tmp_xt_rm = xt_rm; tmp_xt_rm != NULL;
1599                                                 tmp_xt_rm = tmp_xt_rm->next) {
1600                                 xt_m_t = tmp_xt_rm->match;
1601
1602                                 if (tmp_xt_rm->completed ||
1603                                                 (xt_m_t->x6_parse == NULL &&
1604                                                  xt_m_t->parse == NULL))
1605                                         continue;
1606
1607                                 if (c < (int) xt_m_t->option_offset ||
1608                                         c >= (int) xt_m_t->option_offset
1609                                         + XT_OPTION_OFFSET_SCALE)
1610                                         continue;
1611
1612                                 xtables_option_mpcall(c, argv,
1613                                                         invert, xt_m_t, NULL);
1614
1615                                 break;
1616                         }
1617 #else
1618                         if (xt_t == NULL || xt_t->parse == NULL ||
1619                                 !xt_t->parse(c - xt_t->option_offset,
1620                                 argv, invert, &xt_t->tflags, NULL, &xt_t->t)) {
1621
1622                                 for (tmp_xt_rm = xt_rm; tmp_xt_rm != NULL;
1623                                                 tmp_xt_rm = tmp_xt_rm->next) {
1624                                         xt_m_t = tmp_xt_rm->match;
1625
1626                                         if (tmp_xt_rm->completed ||
1627                                                         xt_m_t->parse == NULL)
1628                                                 continue;
1629
1630                                         if (xt_m->parse(c - xt_m->option_offset,
1631                                                 argv, invert, &xt_m->mflags,
1632                                                 NULL, &xt_m->m))
1633                                                 break;
1634                                 }
1635                         }
1636 #endif
1637                         break;
1638                 }
1639
1640                 invert = FALSE;
1641         }
1642
1643 #if XTABLES_VERSION_CODE > 5
1644         for (tmp_xt_rm = xt_rm; tmp_xt_rm != NULL;
1645                                 tmp_xt_rm = tmp_xt_rm->next)
1646                 xtables_option_mfcall(tmp_xt_rm->match);
1647
1648         if (xt_t != NULL)
1649                 xtables_option_tfcall(xt_t);
1650 #else
1651         for (tmp_xt_rm = xt_rm; tmp_xt_rm != NULL;
1652                                 tmp_xt_rm = tmp_xt_rm->next)
1653                 if (tmp_xt_rm->match->final_check != NULL)
1654                         tmp_xt_rm->match->final_check(
1655                                         tmp_xt_rm->match->mflags);
1656
1657         if (xt_t != NULL && xt_t->final_check != NULL)
1658                 xt_t->final_check(xt_t->tflags);
1659 #endif
1660
1661         if (table == NULL) {
1662                 table_name = "filter";
1663
1664                 table = connman_iptables_init(table_name);
1665                 if (table == NULL)
1666                         return -1;
1667         }
1668
1669         if (delete) {
1670                 if (delete_chain == NULL)
1671                         goto out;
1672
1673                 printf("Delete chain %s\n", delete_chain);
1674
1675                 connman_iptables_delete_chain(table, delete_chain);
1676
1677                 goto commit;
1678         }
1679
1680         if (flush_chain) {
1681                 printf("Flush chain %s\n", flush_chain);
1682
1683                 connman_iptables_flush_chain(table, flush_chain);
1684
1685                 goto commit;
1686         }
1687
1688         if (dump) {
1689                 connman_iptables_dump(table);
1690
1691                 return 0;
1692         }
1693
1694         if (chain && new_chain)
1695                 return -1;
1696
1697         if (new_chain) {
1698                 printf("New chain %s\n", new_chain);
1699
1700                 connman_iptables_add_chain(table, new_chain);
1701
1702                 goto commit;
1703         }
1704
1705         if (chain) {
1706                 if (policy != NULL) {
1707                         printf("Changing policy of %s to %s\n", chain, policy);
1708
1709                         connman_iptables_change_policy(table, chain, policy);
1710
1711                         goto commit;
1712                 }
1713
1714                 if (delete_rule == TRUE) {
1715                         printf("Deleting %s to %s (match %s)\n", target_name,
1716                                         chain, match_name);
1717
1718                         connman_iptables_delete_rule(table, &ip, chain,
1719                                         target_name, xt_t, xt_m, xt_rm);
1720
1721                         goto commit;
1722                 }
1723
1724                 if (insert == TRUE) {
1725                         printf("Inserting %s to %s (match %s)\n", target_name,
1726                                         chain, match_name);
1727
1728                         connman_iptables_insert_rule(table, &ip, chain,
1729                                                 target_name, xt_t, xt_rm);
1730                 } else {
1731                         printf("Appending %s to %s (match %s)\n", target_name,
1732                                         chain, match_name);
1733
1734                         connman_iptables_append_rule(table, &ip, chain,
1735                                                 target_name, xt_t, xt_rm);
1736                 }
1737         }
1738
1739 commit:
1740
1741         connman_iptables_commit(table);
1742
1743 out:
1744         connman_iptables_cleanup(table);
1745
1746         if (xt_t)
1747                 g_free(xt_t->t);
1748
1749         if (xt_m)
1750                 g_free(xt_m->m);
1751
1752         return 0;
1753 }