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                         char *match_name, struct xtables_match *xt_m)
 537 {
 538         struct ipt_entry *new_entry;
 539         size_t match_size, target_size;
 540
 541         if (xt_m)
 542                 match_size = xt_m->m->u.match_size;
 543         else
 544                 match_size = 0;
 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         if (xt_m) {
 562                 struct xt_entry_match *entry_match;
 563
 564                 entry_match = (struct xt_entry_match *)new_entry->elems;
 565                 memcpy(entry_match, xt_m->m, match_size);
 566         }
 567
 568         if (xt_t) {
 569                 struct xt_entry_target *entry_target;
 570
 571                 entry_target = ipt_get_target(new_entry);
 572                 memcpy(entry_target, xt_t->t, target_size);
 573         }
 574
 575         return new_entry;
 576 }
 577
 578 static void update_hooks(struct connman_iptables *table, GList *chain_head,
 579                                 struct ipt_entry *entry)
 580 {
 581         GList *list;
 582         struct connman_iptables_entry *head, *e;
 583         int builtin;
 584
 585         if (chain_head == NULL)
 586                 return;
 587
 588         head = chain_head->data;
 589
 590         builtin = head->builtin;
 591         if (builtin < 0)
 592                 return;
 593
 594         table->underflow[builtin] += entry->next_offset;
 595
 596         for (list = chain_head->next; list; list = list->next) {
 597                 e = list->data;
 598
 599                 builtin = e->builtin;
 600                 if (builtin < 0)
 601                         continue;
 602
 603                 table->hook_entry[builtin] += entry->next_offset;
 604                 table->underflow[builtin] += entry->next_offset;
 605         }
 606 }
 607
 608 static struct ipt_entry *prepare_rule_inclusion(struct connman_iptables *table,
 609                                 struct ipt_ip *ip, char *chain_name,
 610                                 char *target_name, struct xtables_target *xt_t,
 611                                 char *match_name, struct xtables_match *xt_m,
 612                                 int *builtin)
 613 {
 614         GList *chain_tail, *chain_head;
 615         struct ipt_entry *new_entry;
 616         struct connman_iptables_entry *head;
 617
 618         chain_head = find_chain_head(table, chain_name);
 619         if (chain_head == NULL)
 620                 return NULL;
 621
 622         chain_tail = find_chain_tail(table, chain_name);
 623         if (chain_tail == NULL)
 624                 return NULL;
 625
 626         new_entry = new_rule(ip, target_name, xt_t, match_name, xt_m);
 627         if (new_entry == NULL)
 628                 return NULL;
 629
 630         update_hooks(table, chain_head, new_entry);
 631
 632         /*
 633          * If the chain is builtin, and does not have any rule,
 634          * then the one that we're inserting is becoming the head
 635          * and thus needs the builtin flag.
 636          */
 637         head = chain_head->data;
 638         if (head->builtin < 0)
 639                 *builtin = -1;
 640         else if (chain_head == chain_tail->prev) {
 641                 *builtin = head->builtin;
 642                 head->builtin = -1;
 643         }
 644
 645         return new_entry;
 646 }
 647
 648 static int connman_iptables_append_rule(struct connman_iptables *table,
 649                                 struct ipt_ip *ip, char *chain_name,
 650                                 char *target_name, struct xtables_target *xt_t,
 651                                 char *match_name, struct xtables_match *xt_m)
 652 {
 653         GList *chain_tail;
 654         struct ipt_entry *new_entry;
 655         int builtin = -1, ret;
 656
 657         chain_tail = find_chain_tail(table, chain_name);
 658         if (chain_tail == NULL)
 659                 return -EINVAL;
 660
 661         new_entry = prepare_rule_inclusion(table, ip, chain_name,
 662                         target_name, xt_t, match_name, xt_m, &builtin);
 663         if (new_entry == NULL)
 664                 return -EINVAL;
 665
 666         ret = connman_add_entry(table, new_entry, chain_tail->prev, builtin);
 667         if (ret < 0)
 668                 g_free(new_entry);
 669
 670         return ret;
 671 }
 672
 673 static int connman_iptables_insert_rule(struct connman_iptables *table,
 674                                 struct ipt_ip *ip, char *chain_name,
 675                                 char *target_name, struct xtables_target *xt_t,
 676                                 char *match_name, struct xtables_match *xt_m)
 677 {
 678         GList *chain_head;
 679         struct ipt_entry *new_entry;
 680         int builtin = -1, ret;
 681
 682         chain_head = find_chain_head(table, chain_name);
 683         if (chain_head == NULL)
 684                 return -EINVAL;
 685
 686         new_entry = prepare_rule_inclusion(table, ip, chain_name,
 687                         target_name, xt_t, match_name, xt_m, &builtin);
 688         if (new_entry == NULL)
 689                 return -EINVAL;
 690
 691         ret = connman_add_entry(table, new_entry, chain_head->next, builtin);
 692         if (ret < 0)
 693                 g_free(new_entry);
 694
 695         return ret;
 696 }
 697
 698 static gboolean is_same_ipt_entry(struct ipt_entry *i_e1,
 699                                         struct ipt_entry *i_e2)
 700 {
 701         if (memcmp(&i_e1->ip, &i_e2->ip, sizeof(struct ipt_ip)) != 0)
 702                 return FALSE;
 703
 704         if (i_e1->target_offset != i_e2->target_offset)
 705                 return FALSE;
 706
 707         if (i_e1->next_offset != i_e2->next_offset)
 708                 return FALSE;
 709
 710         return TRUE;
 711 }
 712
 713 static gboolean is_same_target(struct xt_entry_target *xt_e_t1,
 714                                         struct xt_entry_target *xt_e_t2)
 715 {
 716         if (xt_e_t1 == NULL || xt_e_t2 == NULL)
 717                 return FALSE;
 718
 719         if (strcmp(xt_e_t1->u.user.name, IPT_STANDARD_TARGET) == 0) {
 720                 struct xt_standard_target *xt_s_t1;
 721                 struct xt_standard_target *xt_s_t2;
 722
 723                 xt_s_t1 = (struct xt_standard_target *) xt_e_t1;
 724                 xt_s_t2 = (struct xt_standard_target *) xt_e_t2;
 725
 726                 if (xt_s_t1->verdict != xt_s_t2->verdict)
 727                         return FALSE;
 728         } else {
 729                 if (xt_e_t1->u.target_size != xt_e_t2->u.target_size)
 730                         return FALSE;
 731
 732                 if (strcmp(xt_e_t1->u.user.name, xt_e_t2->u.user.name) != 0)
 733                         return FALSE;
 734         }
 735
 736         return TRUE;
 737 }
 738
 739 static gboolean is_same_match(struct xt_entry_match *xt_e_m1,
 740                                 struct xt_entry_match *xt_e_m2)
 741 {
 742         if (xt_e_m1 == NULL || xt_e_m2 == NULL)
 743                 return FALSE;
 744
 745         if (xt_e_m1->u.match_size != xt_e_m2->u.match_size)
 746                 return FALSE;
 747
 748         if (xt_e_m1->u.user.revision != xt_e_m2->u.user.revision)
 749                 return FALSE;
 750
 751         if (strcmp(xt_e_m1->u.user.name, xt_e_m2->u.user.name) != 0)
 752                 return FALSE;
 753
 754         return TRUE;
 755 }
 756
 757 static int connman_iptables_delete_rule(struct connman_iptables *table,
 758                                 struct ipt_ip *ip, char *chain_name,
 759                                 char *target_name, struct xtables_target *xt_t,
 760                                 char *match_name, struct xtables_match *xt_m)
 761 {
 762         GList *chain_tail, *chain_head, *list;
 763         struct xt_entry_target *xt_e_t = NULL;
 764         struct xt_entry_match *xt_e_m = NULL;
 765         struct connman_iptables_entry *entry;
 766         struct ipt_entry *entry_test;
 767         int builtin, removed;
 768
 769         removed = 0;
 770
 771         chain_head = find_chain_head(table, chain_name);
 772         if (chain_head == NULL)
 773                 return -EINVAL;
 774
 775         chain_tail = find_chain_tail(table, chain_name);
 776         if (chain_tail == NULL)
 777                 return -EINVAL;
 778
 779         if (!xt_t && !xt_m)
 780                 return -EINVAL;
 781
 782         entry_test = new_rule(ip, target_name, xt_t, match_name, xt_m);
 783         if (entry_test == NULL)
 784                 return -EINVAL;
 785
 786         if (xt_t != NULL)
 787                 xt_e_t = ipt_get_target(entry_test);
 788         if (xt_m != NULL)
 789                 xt_e_m = (struct xt_entry_match *)entry_test->elems;
 790
 791         entry = chain_head->data;
 792         builtin = entry->builtin;
 793
 794         if (builtin >= 0)
 795                 list = chain_head;
 796         else
 797                 list = chain_head->next;
 798
 799         for (entry = NULL; list != chain_tail->prev; list = list->next) {
 800                 struct connman_iptables_entry *tmp;
 801                 struct ipt_entry *tmp_e;
 802
 803                 tmp = list->data;
 804                 tmp_e = tmp->entry;
 805
 806                 if (is_same_ipt_entry(entry_test, tmp_e) == FALSE)
 807                         continue;
 808
 809                 if (xt_t != NULL) {
 810                         struct xt_entry_target *tmp_xt_e_t;
 811
 812                         tmp_xt_e_t = ipt_get_target(tmp_e);
 813
 814                         if (!is_same_target(tmp_xt_e_t, xt_e_t))
 815                                 continue;
 816                 }
 817
 818                 if (xt_m != NULL) {
 819                         struct xt_entry_match *tmp_xt_e_m;
 820
 821                         tmp_xt_e_m = (struct xt_entry_match *)tmp_e->elems;
 822
 823                         if (!is_same_match(tmp_xt_e_m, xt_e_m))
 824                                 continue;
 825                 }
 826
 827                 entry = tmp;
 828                 break;
 829         }
 830
 831         if (entry == NULL) {
 832                 g_free(entry_test);
 833                 return -EINVAL;
 834         }
 835
 836         /* We have deleted a rule,
 837          * all references should be bumped accordingly */
 838         if (list->next != NULL)
 839                 update_targets_reference(table, list->next->data,
 840                                                 list->data, TRUE);
 841
 842         removed += remove_table_entry(table, entry);
 843
 844         if (builtin >= 0) {
 845                 list = list->next;
 846                 if (list) {
 847                         entry = list->data;
 848                         entry->builtin = builtin;
 849                 }
 850
 851                 table->underflow[builtin] -= removed;
 852                 for (list = chain_tail; list; list = list->next) {
 853                         entry = list->data;
 854
 855                         builtin = entry->builtin;
 856                         if (builtin < 0)
 857                                 continue;
 858
 859                         table->hook_entry[builtin] -= removed;
 860                         table->underflow[builtin] -= removed;
 861                 }
 862         }
 863
 864         update_offsets(table);
 865
 866         return 0;
 867 }
 868
 869 static struct ipt_replace *connman_iptables_blob(struct connman_iptables *table)
 870 {
 871         struct ipt_replace *r;
 872         GList *list;
 873         struct connman_iptables_entry *e;
 874         unsigned char *entry_index;
 875
 876         r = g_try_malloc0(sizeof(struct ipt_replace) + table->size);
 877         if (r == NULL)
 878                 return NULL;
 879
 880         memset(r, 0, sizeof(*r) + table->size);
 881
 882         r->counters = g_try_malloc0(sizeof(struct xt_counters)
 883                                 * table->old_entries);
 884         if (r->counters == NULL) {
 885                 g_free(r);
 886                 return NULL;
 887         }
 888
 889         strcpy(r->name, table->info->name);
 890         r->num_entries = table->num_entries;
 891         r->size = table->size;
 892
 893         r->num_counters = table->old_entries;
 894         r->valid_hooks  = table->info->valid_hooks;
 895
 896         memcpy(r->hook_entry, table->hook_entry, sizeof(table->hook_entry));
 897         memcpy(r->underflow, table->underflow, sizeof(table->underflow));
 898
 899         entry_index = (unsigned char *)r->entries;
 900         for (list = table->entries; list; list = list->next) {
 901                 e = list->data;
 902
 903                 memcpy(entry_index, e->entry, e->entry->next_offset);
 904                 entry_index += e->entry->next_offset;
 905         }
 906
 907         return r;
 908 }
 909
 910 static void dump_target(struct connman_iptables *table,
 911                                 struct ipt_entry *entry)
 912
 913 {
 914         struct xtables_target *xt_t;
 915         struct xt_entry_target *target;
 916
 917         target = ipt_get_target(entry);
 918
 919         if (!strcmp(target->u.user.name, IPT_STANDARD_TARGET)) {
 920                 struct xt_standard_target *t;
 921
 922                 t = (struct xt_standard_target *)target;
 923
 924                 switch (t->verdict) {
 925                 case XT_RETURN:
 926                         printf("\ttarget RETURN\n");
 927                         break;
 928
 929                 case -NF_ACCEPT - 1:
 930                         printf("\ttarget ACCEPT\n");
 931                         break;
 932
 933                 case -NF_DROP - 1:
 934                         printf("\ttarget DROP\n");
 935                         break;
 936
 937                 case -NF_QUEUE - 1:
 938                         printf("\ttarget QUEUE\n");
 939                         break;
 940
 941                 case -NF_STOP - 1:
 942                         printf("\ttarget STOP\n");
 943                         break;
 944
 945                 default:
 946                         printf("\tJUMP @%p (0x%x)\n",
 947                                 (char*)table->blob_entries->entrytable +
 948                                 t->verdict, t->verdict);
 949                         break;
 950                 }
 951
 952                 xt_t = xtables_find_target(IPT_STANDARD_TARGET,
 953                                                 XTF_LOAD_MUST_SUCCEED);
 954
 955                 if(xt_t->print != NULL)
 956                         xt_t->print(NULL, target, 1);
 957         } else {
 958                 xt_t = xtables_find_target(target->u.user.name, XTF_TRY_LOAD);
 959                 if (xt_t == NULL) {
 960                         printf("\ttarget %s\n", target->u.user.name);
 961                         return;
 962                 }
 963
 964                 if(xt_t->print != NULL) {
 965                         printf("\ttarget ");
 966                         xt_t->print(NULL, target, 1);
 967                         printf("\n");
 968                 }
 969         }
 970 }
 971
 972 static void dump_match(struct connman_iptables *table, struct ipt_entry *entry)
 973 {
 974         struct xtables_match *xt_m;
 975         struct xt_entry_match *match;
 976
 977         if (entry->elems == (unsigned char *)entry + entry->target_offset)
 978                 return;
 979
 980         match = (struct xt_entry_match *) entry->elems;
 981
 982         if (!strlen(match->u.user.name))
 983                 return;
 984
 985         xt_m = xtables_find_match(match->u.user.name, XTF_TRY_LOAD, NULL);
 986         if (xt_m == NULL)
 987                 goto out;
 988
 989         if(xt_m->print != NULL) {
 990                 printf("\tmatch ");
 991                 xt_m->print(NULL, match, 1);
 992                 printf("\n");
 993
 994                 return;
 995         }
 996
 997 out:
 998         printf("\tmatch %s\n", match->u.user.name);
 999
1000 }
1001
1002 static int connman_iptables_dump_entry(struct ipt_entry *entry,
1003                                         struct connman_iptables *table)
1004 {
1005         struct xt_entry_target *target;
1006         unsigned int offset;
1007         int builtin;
1008
1009         offset = (char *)entry - (char *)table->blob_entries->entrytable;
1010         target = ipt_get_target(entry);
1011         builtin = is_hook_entry(table, entry);
1012
1013         if (entry_to_offset(table, entry) + entry->next_offset ==
1014                                         table->blob_entries->size) {
1015                 printf("End of CHAIN 0x%x\n", offset);
1016                 return 0;
1017         }
1018
1019         if (!strcmp(target->u.user.name, IPT_ERROR_TARGET)) {
1020                 printf("USER CHAIN (%s) %p  match %p  target %p  size %d\n",
1021                         target->data, entry, entry->elems,
1022                         (char *)entry + entry->target_offset,
1023                                 entry->next_offset);
1024
1025                 return 0;
1026         } else if (builtin >= 0) {
1027                 printf("CHAIN (%s) %p  match %p  target %p  size %d\n",
1028                         hooknames[builtin], entry, entry->elems,
1029                         (char *)entry + entry->target_offset,
1030                                 entry->next_offset);
1031         } else {
1032                 printf("RULE %p  match %p  target %p  size %d\n", entry,
1033                         entry->elems,
1034                         (char *)entry + entry->target_offset,
1035                                 entry->next_offset);
1036         }
1037
1038         dump_match(table, entry);
1039         dump_target(table, entry);
1040
1041         return 0;
1042 }
1043
1044 static void connman_iptables_dump_hook(struct connman_iptables *table)
1045 {
1046         int i;
1047         printf("hooks: \n");
1048         for (i = 0; i < NF_INET_NUMHOOKS; i++) {
1049                 if ((table->info->valid_hooks & (1 << i)))
1050                         printf("%s entry %p underflow %p (%#x)\n",
1051                                 hooknames[i],
1052                                 table->blob_entries->entrytable +
1053                                                 table->info->hook_entry[i],
1054                                 table->blob_entries->entrytable +
1055                                                 table->info->underflow[i],
1056                                         table->info->underflow[i]);
1057         }
1058 }
1059
1060 static void connman_iptables_dump(struct connman_iptables *table)
1061 {
1062         printf("%s valid_hooks=0x%08x, num_entries=%u, size=%u\n",
1063                 table->info->name,
1064                 table->info->valid_hooks, table->info->num_entries,
1065                 table->info->size);
1066
1067         connman_iptables_dump_hook(table);
1068
1069         ENTRY_ITERATE(table->blob_entries->entrytable,
1070                         table->blob_entries->size,
1071                         connman_iptables_dump_entry, table);
1072
1073 }
1074
1075 static int connman_iptables_get_entries(struct connman_iptables *table)
1076 {
1077         socklen_t entry_size;
1078
1079         entry_size = sizeof(struct ipt_get_entries) + table->info->size;
1080
1081         return getsockopt(table->ipt_sock, IPPROTO_IP, IPT_SO_GET_ENTRIES,
1082                                 table->blob_entries, &entry_size);
1083 }
1084
1085 static int connman_iptables_replace(struct connman_iptables *table,
1086                                         struct ipt_replace *r)
1087 {
1088         return setsockopt(table->ipt_sock, IPPROTO_IP, IPT_SO_SET_REPLACE, r,
1089                          sizeof(*r) + r->size);
1090 }
1091
1092 static void connman_iptables_cleanup(struct connman_iptables *table)
1093 {
1094         GList *list;
1095         struct connman_iptables_entry *entry;
1096
1097         close(table->ipt_sock);
1098
1099         for (list = table->entries; list; list = list->next) {
1100                 entry = list->data;
1101
1102                 g_free(entry->entry);
1103         }
1104
1105         g_free(table->info);
1106         g_free(table->blob_entries);
1107         g_free(table);
1108
1109         xtables_free_opts(1);
1110 }
1111
1112 static int connman_iptables_commit(struct connman_iptables *table)
1113 {
1114         struct ipt_replace *repl;
1115
1116         repl = connman_iptables_blob(table);
1117
1118         return connman_iptables_replace(table, repl);
1119 }
1120
1121 static int add_entry(struct ipt_entry *entry, struct connman_iptables *table)
1122 {
1123         struct ipt_entry *new_entry;
1124         int builtin;
1125
1126         new_entry = g_try_malloc0(entry->next_offset);
1127         if (new_entry == NULL)
1128                 return -ENOMEM;
1129
1130         memcpy(new_entry, entry, entry->next_offset);
1131
1132         builtin = is_hook_entry(table, entry);
1133
1134         return connman_add_entry(table, new_entry, NULL, builtin);
1135 }
1136
1137 static struct connman_iptables *connman_iptables_init(const char *table_name)
1138 {
1139         struct connman_iptables *table = NULL;
1140         char *module = NULL;
1141         socklen_t s;
1142
1143         if (xtables_insmod("ip_tables", NULL, TRUE) != 0)
1144                 goto err;
1145
1146         module = g_strconcat("iptable_", table_name, NULL);
1147         if (module == NULL)
1148                 goto err;
1149
1150         if (xtables_insmod(module, NULL, TRUE) != 0)
1151                 goto err;
1152
1153         g_free(module);
1154         module = NULL;
1155
1156         table =  g_try_new0(struct connman_iptables, 1);
1157         if (table == NULL)
1158                 return NULL;
1159
1160         table->info =  g_try_new0(struct ipt_getinfo, 1);
1161         if (table->info == NULL)
1162                 goto err;
1163
1164         table->ipt_sock = socket(AF_INET, SOCK_RAW | SOCK_CLOEXEC, IPPROTO_RAW);
1165         if (table->ipt_sock < 0)
1166                 goto err;
1167
1168         s = sizeof(*table->info);
1169         strcpy(table->info->name, table_name);
1170         if (getsockopt(table->ipt_sock, IPPROTO_IP, IPT_SO_GET_INFO,
1171                                                 table->info, &s) < 0)
1172                 goto err;
1173
1174         table->blob_entries = g_try_malloc0(sizeof(struct ipt_get_entries) +
1175                                                 table->info->size);
1176         if (table->blob_entries == NULL)
1177                 goto err;
1178
1179         strcpy(table->blob_entries->name, table_name);
1180         table->blob_entries->size = table->info->size;
1181
1182         if (connman_iptables_get_entries(table) < 0)
1183                 goto err;
1184
1185         table->num_entries = 0;
1186         table->old_entries = table->info->num_entries;
1187         table->size = 0;
1188
1189         memcpy(table->underflow, table->info->underflow,
1190                                 sizeof(table->info->underflow));
1191         memcpy(table->hook_entry, table->info->hook_entry,
1192                                 sizeof(table->info->hook_entry));
1193
1194         ENTRY_ITERATE(table->blob_entries->entrytable,
1195                         table->blob_entries->size,
1196                                 add_entry, table);
1197
1198         return table;
1199
1200 err:
1201         g_free(module);
1202
1203         connman_iptables_cleanup(table);
1204
1205         return NULL;
1206 }
1207
1208 static struct option connman_iptables_opts[] = {
1209         {.name = "append",        .has_arg = 1, .val = 'A'},
1210         {.name = "delete",        .has_arg = 1, .val = 'D'},
1211         {.name = "flush-chain",   .has_arg = 1, .val = 'F'},
1212         {.name = "insert",        .has_arg = 1, .val = 'I'},
1213         {.name = "list",          .has_arg = 2, .val = 'L'},
1214         {.name = "new-chain",     .has_arg = 1, .val = 'N'},
1215         {.name = "delete-chain",  .has_arg = 1, .val = 'X'},
1216         {.name = "destination",   .has_arg = 1, .val = 'd'},
1217         {.name = "in-interface",  .has_arg = 1, .val = 'i'},
1218         {.name = "jump",          .has_arg = 1, .val = 'j'},
1219         {.name = "match",         .has_arg = 1, .val = 'm'},
1220         {.name = "out-interface", .has_arg = 1, .val = 'o'},
1221         {.name = "source",        .has_arg = 1, .val = 's'},
1222         {.name = "table",         .has_arg = 1, .val = 't'},
1223         {NULL},
1224 };
1225
1226 struct xtables_globals connman_iptables_globals = {
1227         .option_offset = 0,
1228         .opts = connman_iptables_opts,
1229         .orig_opts = connman_iptables_opts,
1230 };
1231
1232 static struct xtables_target *prepare_target(struct connman_iptables *table,
1233                                                         char *target_name)
1234 {
1235         struct xtables_target *xt_t = NULL;
1236         gboolean is_builtin, is_user_defined;
1237         GList *chain_head = NULL;
1238         size_t target_size;
1239
1240         is_builtin = FALSE;
1241         is_user_defined = FALSE;
1242
1243         if (is_builtin_target(target_name))
1244                 is_builtin = TRUE;
1245         else {
1246                 chain_head = find_chain_head(table, target_name);
1247                 if (chain_head != NULL && chain_head->next != NULL)
1248                         is_user_defined = TRUE;
1249         }
1250
1251         if (is_builtin || is_user_defined)
1252                 xt_t = xtables_find_target(IPT_STANDARD_TARGET,
1253                                                 XTF_LOAD_MUST_SUCCEED);
1254         else
1255                 xt_t = xtables_find_target(target_name, XTF_TRY_LOAD);
1256
1257         if (xt_t == NULL)
1258                 return NULL;
1259
1260         target_size = ALIGN(sizeof(struct ipt_entry_target)) + xt_t->size;
1261
1262         xt_t->t = g_try_malloc0(target_size);
1263         if (xt_t->t == NULL)
1264                 return NULL;
1265
1266         xt_t->t->u.target_size = target_size;
1267
1268         if (is_builtin || is_user_defined) {
1269                 struct xt_standard_target *target;
1270
1271                 target = (struct xt_standard_target *)(xt_t->t);
1272                 strcpy(target->target.u.user.name, IPT_STANDARD_TARGET);
1273
1274                 if (is_builtin == TRUE)
1275                         target->verdict = target_to_verdict(target_name);
1276                 else if (is_user_defined == TRUE) {
1277                         struct connman_iptables_entry *target_rule;
1278
1279                         if (chain_head == NULL) {
1280                                 g_free(xt_t->t);
1281                                 return NULL;
1282                         }
1283
1284                         target_rule = chain_head->next->data;
1285                         target->verdict = target_rule->offset;
1286                 }
1287         } else {
1288                 strcpy(xt_t->t->u.user.name, target_name);
1289                 xt_t->t->u.user.revision = xt_t->revision;
1290                 if (xt_t->init != NULL)
1291                         xt_t->init(xt_t->t);
1292         }
1293
1294         if (xt_t->x6_options != NULL)
1295                 connman_iptables_globals.opts =
1296                         xtables_options_xfrm(
1297 #if XTABLES_VERSION_CODE > 5
1298                                 connman_iptables_globals.orig_opts,
1299 #endif
1300                                 connman_iptables_globals.opts,
1301                                 xt_t->x6_options,
1302                                 &xt_t->option_offset);
1303         else
1304                 connman_iptables_globals.opts =
1305                         xtables_merge_options(
1306 #if XTABLES_VERSION_CODE > 5
1307                                 connman_iptables_globals.orig_opts,
1308 #endif
1309                                 connman_iptables_globals.opts,
1310                                 xt_t->extra_opts,
1311                                 &xt_t->option_offset);
1312
1313         if (connman_iptables_globals.opts == NULL) {
1314                 g_free(xt_t->t);
1315                 xt_t = NULL;
1316         }
1317
1318         return xt_t;
1319 }
1320
1321 static struct xtables_match *prepare_matches(struct connman_iptables *table,
1322                         struct xtables_rule_match **xt_rm, char *match_name)
1323 {
1324         struct xtables_match *xt_m;
1325         size_t match_size;
1326
1327         if (match_name == NULL)
1328                 return NULL;
1329
1330         xt_m = xtables_find_match(match_name, XTF_LOAD_MUST_SUCCEED, xt_rm);
1331         match_size = ALIGN(sizeof(struct ipt_entry_match)) + xt_m->size;
1332
1333         xt_m->m = g_try_malloc0(match_size);
1334         if (xt_m->m == NULL)
1335                 return NULL;
1336
1337         xt_m->m->u.match_size = match_size;
1338         strcpy(xt_m->m->u.user.name, xt_m->name);
1339         xt_m->m->u.user.revision = xt_m->revision;
1340
1341         if (xt_m->init != NULL)
1342                 xt_m->init(xt_m->m);
1343
1344         if (xt_m == xt_m->next)
1345                 goto done;
1346
1347         if (xt_m->x6_options != NULL)
1348                 connman_iptables_globals.opts =
1349                         xtables_options_xfrm(
1350 #if XTABLES_VERSION_CODE > 5
1351                                 connman_iptables_globals.orig_opts,
1352 #endif
1353                                 connman_iptables_globals.opts,
1354                                 xt_m->x6_options,
1355                                 &xt_m->option_offset);
1356         else
1357                 connman_iptables_globals.opts =
1358                         xtables_merge_options(
1359 #if XTABLES_VERSION_CODE > 5
1360                                 connman_iptables_globals.orig_opts,
1361 #endif
1362                                 connman_iptables_globals.opts,
1363                                 xt_m->extra_opts,
1364                                 &xt_m->option_offset);
1365
1366         if (connman_iptables_globals.opts == NULL) {
1367                 g_free(xt_m->m);
1368                 xt_m = NULL;
1369         }
1370
1371 done:
1372         return xt_m;
1373 }
1374
1375 int main(int argc, char *argv[])
1376 {
1377         struct connman_iptables *table;
1378         struct xtables_rule_match *xt_rm, *tmp_xt_rm;
1379         struct xtables_match *xt_m, *xt_m_t;
1380         struct xtables_target *xt_t;
1381         struct ipt_ip ip;
1382         char *table_name, *chain, *new_chain, *match_name, *target_name;
1383         char *delete_chain, *flush_chain;
1384         int c, in_len, out_len;
1385         gboolean dump, invert, delete, insert, delete_rule;
1386         struct in_addr src, dst;
1387
1388         xtables_init_all(&connman_iptables_globals, NFPROTO_IPV4);
1389
1390         dump = FALSE;
1391         invert = FALSE;
1392         delete = FALSE;
1393         insert = FALSE;
1394         delete_rule = FALSE;
1395         table_name = chain = new_chain = match_name = target_name = NULL;
1396         delete_chain = flush_chain = NULL;
1397         memset(&ip, 0, sizeof(struct ipt_ip));
1398         table = NULL;
1399         xt_rm = NULL;
1400         xt_m = NULL;
1401         xt_t = NULL;
1402
1403         while ((c = getopt_long(argc, argv, "-A:D:F:I:L::N:X:d:i:j:m:o:s:t:",
1404                                 connman_iptables_globals.opts, NULL)) != -1) {
1405                 switch (c) {
1406                 case 'A':
1407                         /* It is either -A, -D or -I at once */
1408                         if (chain)
1409                                 goto out;
1410
1411                         chain = optarg;
1412                         break;
1413
1414                 case 'D':
1415                         /* It is either -A, -D or -I at once */
1416                         if (chain)
1417                                 goto out;
1418
1419                         chain = optarg;
1420                         delete_rule = TRUE;
1421                         break;
1422
1423                 case 'F':
1424                         flush_chain = optarg;
1425                         break;
1426
1427                 case 'I':
1428                         /* It is either -A, -D or -I at once */
1429                         if (chain)
1430                                 goto out;
1431
1432                         chain = optarg;
1433                         insert = TRUE;
1434                         break;
1435
1436                 case 'L':
1437                         dump = true;
1438                         break;
1439
1440                 case 'N':
1441                         new_chain = optarg;
1442                         break;
1443
1444                 case 'X':
1445                         delete = true;
1446                         delete_chain = optarg;
1447                         break;
1448
1449                 case 'd':
1450                         if (!inet_pton(AF_INET, optarg, &dst))
1451                                 break;
1452
1453                         ip.dst = dst;
1454                         inet_pton(AF_INET, "255.255.255.255", &ip.dmsk);
1455
1456                         if (invert)
1457                                 ip.invflags |= IPT_INV_DSTIP;
1458
1459                         break;
1460
1461                 case 'i':
1462                         in_len = strlen(optarg);
1463
1464                         if (in_len + 1 > IFNAMSIZ)
1465                                 break;
1466
1467                         strcpy(ip.iniface, optarg);
1468                         memset(ip.iniface_mask, 0xff, in_len + 1);
1469
1470                         if (invert)
1471                                 ip.invflags |= IPT_INV_VIA_IN;
1472
1473                         break;
1474
1475                 case 'j':
1476                         target_name = optarg;
1477                         xt_t = prepare_target(table, target_name);
1478                         if (xt_t == NULL)
1479                                 goto out;
1480
1481                         break;
1482
1483                 case 'm':
1484                         match_name = optarg;
1485                         xt_m = prepare_matches(table, &xt_rm, match_name);
1486                         if (xt_m == NULL)
1487                                 goto out;
1488
1489                         break;
1490
1491                 case 'o':
1492                         out_len = strlen(optarg);
1493
1494                         if (out_len + 1 > IFNAMSIZ)
1495                                 break;
1496
1497                         strcpy(ip.outiface, optarg);
1498                         memset(ip.outiface_mask, 0xff, out_len + 1);
1499
1500                         if (invert)
1501                                 ip.invflags |= IPT_INV_VIA_OUT;
1502
1503                         break;
1504
1505                 case 's':
1506                         if (!inet_pton(AF_INET, optarg, &src))
1507                                 break;
1508
1509                         ip.src = src;
1510                         inet_pton(AF_INET, "255.255.255.255", &ip.smsk);
1511
1512                         if (invert)
1513                                 ip.invflags |= IPT_INV_SRCIP;
1514
1515                         break;
1516
1517                 case 't':
1518                         table_name = optarg;
1519                         break;
1520
1521                 case 1:
1522                         if (optarg[0] == '!' && optarg[1] == '\0') {
1523                                 if (invert)
1524                                         printf("Consecutive ! not allowed\n");
1525
1526                                 invert = TRUE;
1527                                 optarg[0] = '\0';
1528                                 continue;
1529                         }
1530
1531                         printf("Invalid option\n");
1532
1533                         return -1;
1534
1535                 default:
1536                         if (xt_t != NULL && (xt_t->x6_parse != NULL ||
1537                                                 xt_t->parse != NULL) &&
1538                                         (c >= (int) xt_t->option_offset &&
1539                                         c < (int) xt_t->option_offset +
1540                                         XT_OPTION_OFFSET_SCALE)) {
1541                                 xtables_option_tpcall(c, argv,
1542                                                         invert, xt_t, NULL);
1543
1544                                 break;
1545                         }
1546
1547                         for (tmp_xt_rm = xt_rm; tmp_xt_rm != NULL;
1548                                                 tmp_xt_rm = tmp_xt_rm->next) {
1549                                 xt_m_t = tmp_xt_rm->match;
1550
1551                                 if (tmp_xt_rm->completed ||
1552                                                 (xt_m_t->x6_parse == NULL &&
1553                                                  xt_m_t->parse == NULL))
1554                                         continue;
1555
1556                                 if (c < (int) xt_m_t->option_offset ||
1557                                         c >= (int) xt_m_t->option_offset
1558                                         + XT_OPTION_OFFSET_SCALE)
1559                                         continue;
1560
1561                                 xtables_option_mpcall(c, argv,
1562                                                         invert, xt_m_t, NULL);
1563
1564                                 break;
1565                         }
1566
1567                         break;
1568                 }
1569         }
1570
1571         for (tmp_xt_rm = xt_rm; tmp_xt_rm != NULL;
1572                                 tmp_xt_rm = tmp_xt_rm->next)
1573                 xtables_option_mfcall(tmp_xt_rm->match);
1574
1575         if (xt_t != NULL)
1576                 xtables_option_tfcall(xt_t);
1577
1578         if (table_name == NULL)
1579                 table_name = "filter";
1580
1581         table = connman_iptables_init(table_name);
1582         if (table == NULL)
1583                 return -1;
1584
1585         if (delete) {
1586                 if (delete_chain == NULL)
1587                         goto out;
1588
1589                 printf("Delete chain %s\n", delete_chain);
1590
1591                 connman_iptables_delete_chain(table, delete_chain);
1592
1593                 goto commit;
1594         }
1595
1596         if (flush_chain) {
1597                 printf("Flush chain %s\n", flush_chain);
1598
1599                 connman_iptables_flush_chain(table, flush_chain);
1600
1601                 goto commit;
1602         }
1603
1604         if (dump) {
1605                 connman_iptables_dump(table);
1606
1607                 return 0;
1608         }
1609
1610         if (chain && new_chain)
1611                 return -1;
1612
1613         if (new_chain) {
1614                 printf("New chain %s\n", new_chain);
1615
1616                 connman_iptables_add_chain(table, new_chain);
1617
1618                 goto commit;
1619         }
1620
1621         if (chain) {
1622                 if (delete_rule == TRUE) {
1623                         printf("Deleting %s to %s (match %s)\n", target_name,
1624                                         chain, match_name);
1625
1626                         connman_iptables_delete_rule(table, &ip, chain,
1627                                         target_name, xt_t, match_name, xt_m);
1628
1629                         goto commit;
1630                 }
1631
1632                 if (insert == TRUE) {
1633                         printf("Inserting %s to %s (match %s)\n", target_name,
1634                                         chain, match_name);
1635
1636                         connman_iptables_insert_rule(table, &ip, chain,
1637                                         target_name, xt_t, match_name, xt_m);
1638                 } else {
1639                         printf("Appending %s to %s (match %s)\n", target_name,
1640                                         chain, match_name);
1641
1642                         connman_iptables_append_rule(table, &ip, chain,
1643                                 target_name, xt_t, match_name, xt_m);
1644                 }
1645         }
1646
1647 commit:
1648
1649         connman_iptables_commit(table);
1650
1651 out:
1652         connman_iptables_cleanup(table);
1653
1654         if (xt_t)
1655                 g_free(xt_t->t);
1656
1657         if (xt_m)
1658                 g_free(xt_m->m);
1659
1660         return 0;
1661 }