tools/iptables-test.c

   1 /*
   2  *  Connection Manager
   3  *
   4  *  Copyright (C) 2007-2010  Intel Corporation. All rights reserved.
   5  *
   6  *  This program is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License version 2 as
   8  *  published by the Free Software Foundation.
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with this program; if not, write to the Free Software
  17  *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  18  *
  19  */
  20
  21 #include <getopt.h>
  22 #include <stdlib.h>
  23 #include <stdio.h>
  24 #include <string.h>
  25 #include <unistd.h>
  26 #include <sys/errno.h>
  27 #include <sys/socket.h>
  28 #include <xtables.h>
  29
  30 #include <linux/netfilter_ipv4/ip_tables.h>
  31
  32 #include <glib.h>
  33
  34 static const char *hooknames[] = {
  35         [NF_IP_PRE_ROUTING]     = "PREROUTING",
  36         [NF_IP_LOCAL_IN]        = "INPUT",
  37         [NF_IP_FORWARD]         = "FORWARD",
  38         [NF_IP_LOCAL_OUT]       = "OUTPUT",
  39         [NF_IP_POST_ROUTING]    = "POSTROUTING",
  40 };
  41
  42 #define LABEL_ACCEPT  "ACCEPT"
  43 #define LABEL_DROP    "DROP"
  44 #define LABEL_QUEUE   "QUEUE"
  45 #define LABEL_RETURN  "RETURN"
  46
  47 /* fn returns 0 to continue iteration */
  48 #define _XT_ENTRY_ITERATE_CONTINUE(type, entries, size, n, fn, args...) \
  49 ({                                                              \
  50         unsigned int __i;                                       \
  51         int __n;                                                \
  52         int __ret = 0;                                          \
  53         type *__entry;                                          \
  54                                                                 \
  55         for (__i = 0, __n = 0; __i < (size);                    \
  56              __i += __entry->next_offset, __n++) {              \
  57                 __entry = (void *)(entries) + __i;              \
  58                 if (__n < n)                                    \
  59                         continue;                               \
  60                                                                 \
  61                 __ret = fn(__entry,  ## args);                  \
  62                 if (__ret != 0)                                 \
  63                         break;                                  \
  64         }                                                       \
  65         __ret;                                                  \
  66 })
  67
  68 /* fn returns 0 to continue iteration */
  69 #define _XT_ENTRY_ITERATE(type, entries, size, fn, args...) \
  70         _XT_ENTRY_ITERATE_CONTINUE(type, entries, size, 0, fn, args)
  71
  72 #define ENTRY_ITERATE(entries, size, fn, args...) \
  73         _XT_ENTRY_ITERATE(struct ipt_entry, entries, size, fn, ## args)
  74
  75 #define MIN_ALIGN (__alignof__(struct ipt_entry))
  76
  77 #define ALIGN(s) (((s) + ((MIN_ALIGN)-1)) & ~((MIN_ALIGN)-1))
  78
  79 struct ipt_error_target {
  80         struct xt_entry_target t;
  81         char error[IPT_TABLE_MAXNAMELEN];
  82 };
  83
  84 struct connman_iptables_entry {
  85         int offset;
  86
  87         struct ipt_entry *entry;
  88 };
  89
  90 struct connman_iptables {
  91         int ipt_sock;
  92
  93         struct ipt_getinfo *info;
  94         struct ipt_get_entries *blob_entries;
  95
  96         unsigned int num_entries;
  97         unsigned int old_entries;
  98         unsigned int size;
  99
 100         GList *entries;
 101 };
 102
 103
 104 static struct ipt_entry *get_entry(struct connman_iptables *table,
 105                                         unsigned int offset)
 106 {
 107         return (struct ipt_entry *)((char *)table->blob_entries->entrytable +
 108                                                                         offset);
 109 }
 110
 111 static int is_hook_entry(struct connman_iptables *table,
 112                                 struct ipt_entry *entry)
 113 {
 114         unsigned int i;
 115
 116         for (i = 0; i < NF_INET_NUMHOOKS; i++) {
 117                 if ((table->info->valid_hooks & (1 << i))
 118                 && get_entry(table, table->info->hook_entry[i]) == entry)
 119                         return i;
 120         }
 121
 122         return -1;
 123 }
 124
 125 static unsigned long entry_to_offset(struct connman_iptables *table,
 126                                         struct ipt_entry *entry)
 127 {
 128         return (void *)entry - (void *)table->blob_entries->entrytable;
 129 }
 130
 131 static int target_to_verdict(char *target_name)
 132 {
 133         if (!strcmp(target_name, LABEL_ACCEPT))
 134                 return -NF_ACCEPT - 1;
 135
 136         if (!strcmp(target_name, LABEL_DROP))
 137                 return -NF_DROP - 1;
 138
 139         if (!strcmp(target_name, LABEL_QUEUE))
 140                 return -NF_QUEUE - 1;
 141
 142         if (!strcmp(target_name, LABEL_RETURN))
 143                 return XT_RETURN;
 144
 145         return 0;
 146 }
 147
 148 static gboolean is_builtin_target(char *target_name)
 149 {
 150         if (!strcmp(target_name, LABEL_ACCEPT) ||
 151                 !strcmp(target_name, LABEL_DROP) ||
 152                 !strcmp(target_name, LABEL_QUEUE) ||
 153                 !strcmp(target_name, LABEL_RETURN))
 154                 return TRUE;
 155
 156         return FALSE;
 157 }
 158
 159 static gboolean is_jump(struct connman_iptables_entry *e)
 160 {
 161         struct xt_entry_target *target;
 162
 163         target = ipt_get_target(e->entry);
 164
 165         if (!strcmp(target->u.user.name, IPT_STANDARD_TARGET)) {
 166                 struct xt_standard_target *t;
 167
 168                 t = (struct xt_standard_target *)target;
 169
 170                 switch (t->verdict) {
 171                 case XT_RETURN:
 172                 case -NF_ACCEPT - 1:
 173                 case -NF_DROP - 1:
 174                 case -NF_QUEUE - 1:
 175                 case -NF_STOP - 1:
 176                         return false;
 177
 178                 default:
 179                         return true;
 180                 }
 181         }
 182
 183         return false;
 184 }
 185
 186 static gboolean is_chain(struct connman_iptables *table,
 187                                 struct connman_iptables_entry *e)
 188 {
 189         int builtin;
 190         struct ipt_entry *entry;
 191         struct xt_entry_target *target;
 192
 193         entry = e->entry;
 194         builtin = is_hook_entry(table, entry);
 195         if (builtin >= 0)
 196                 return TRUE;
 197
 198         target = ipt_get_target(entry);
 199         if (!strcmp(target->u.user.name, IPT_ERROR_TARGET))
 200                 return TRUE;
 201
 202         return FALSE;
 203 }
 204
 205 static GList *find_chain_head(struct connman_iptables *table,
 206                                 char *chain_name)
 207 {
 208         GList *list;
 209         struct connman_iptables_entry *head;
 210         struct ipt_entry *entry;
 211         struct xt_entry_target *target;
 212         int builtin;
 213
 214         for (list = table->entries; list; list = list->next) {
 215                 head = list->data;
 216                 entry = head->entry;
 217
 218                 /* Buit-in chain */
 219                 builtin = is_hook_entry(table, entry);
 220                 if (builtin >= 0 && !strcmp(hooknames[builtin], chain_name))
 221                         break;
 222
 223                 /* User defined chain */
 224                 target = ipt_get_target(entry);
 225                 if (!strcmp(target->u.user.name, IPT_ERROR_TARGET) &&
 226                     !strcmp((char *)target->data, chain_name))
 227                         break;
 228         }
 229
 230         return list;
 231 }
 232
 233 static GList *find_chain_tail(struct connman_iptables *table,
 234                                 char *chain_name)
 235 {
 236         GList *chain_head, *list;
 237         struct connman_iptables_entry *head, *tail;
 238         struct ipt_entry *entry;
 239         struct xt_entry_target *target;
 240         int builtin;
 241
 242         /* First we look for the head */
 243         for (list = table->entries; list; list = list->next) {
 244                 head = list->data;
 245                 entry = head->entry;
 246
 247                 /* Buit-in chain */
 248                 builtin = is_hook_entry(table, entry);
 249                 if (builtin >= 0 && !strcmp(hooknames[builtin], chain_name))
 250                         break;
 251
 252                 /* User defined chain */
 253                 target = ipt_get_target(entry);
 254                 if (!strcmp(target->u.user.name, IPT_ERROR_TARGET) &&
 255                     !strcmp((char *)target->data, chain_name))
 256                         break;
 257         }
 258
 259         if (list == NULL)
 260                 return NULL;
 261
 262         chain_head = list;
 263
 264         /* Then we look for the next chain */
 265         for (list = chain_head->next; list; list = list->next) {
 266                 tail = list->data;
 267                 entry = tail->entry;
 268
 269                 if (is_chain(table, tail))
 270                         return list;
 271         }
 272
 273         /* Nothing found, we return the table end */
 274         return g_list_last(table->entries);
 275 }
 276
 277 static void update_offsets(struct connman_iptables *table)
 278 {
 279         GList *list, *prev;
 280         struct connman_iptables_entry *entry, *prev_entry;
 281
 282         for (list = table->entries; list; list = list->next) {
 283                 entry = list->data;
 284
 285                 if (list == table->entries) {
 286                         entry->offset = 0;
 287
 288                         continue;
 289                 }
 290
 291                 prev = list->prev;
 292                 prev_entry = prev->data;
 293
 294                 entry->offset = prev_entry->offset +
 295                                         prev_entry->entry->next_offset;
 296         }
 297 }
 298
 299 static int connman_add_entry(struct connman_iptables *table,
 300                                 struct ipt_entry *entry, GList *before)
 301 {
 302         GList *list;
 303         struct connman_iptables_entry *e, *tmp, *entry_before;
 304         struct xt_standard_target *t;
 305
 306         if (table == NULL)
 307                 return -1;
 308
 309         e = g_try_malloc0(sizeof(struct connman_iptables_entry));
 310         if (e == NULL)
 311                 return -1;
 312
 313         e->entry = entry;
 314
 315         table->entries = g_list_insert_before(table->entries, before, e);
 316         table->num_entries++;
 317         table->size += entry->next_offset;
 318
 319         if (before == NULL) {
 320                 e->offset = table->size - entry->next_offset;
 321
 322                 return 0;
 323         }
 324
 325         entry_before = before->data;
 326
 327         /*
 328          * We've just insterted a new entry. All references before it
 329          * should be bumped accordingly.
 330          */
 331         for (list = table->entries; list != before; list = list->next) {
 332                 tmp = list->data;
 333
 334                 if (!is_jump(tmp))
 335                         continue;
 336
 337                 t = (struct xt_standard_target *)ipt_get_target(tmp->entry);
 338
 339                 if (t->verdict >= entry_before->offset)
 340                         t->verdict += entry->next_offset;
 341         }
 342
 343         update_offsets(table);
 344
 345         return 0;
 346 }
 347
 348 static int connman_iptables_delete_chain(struct connman_iptables *table,
 349                                                 char *name)
 350 {
 351         GList *chain_head, *chain_tail, *list, *next;
 352         struct connman_iptables_entry *entry;
 353
 354         chain_head = find_chain_head(table, name);
 355         if (chain_head == NULL)
 356                 return -EINVAL;
 357
 358         chain_tail = find_chain_tail(table, name);
 359         if (chain_head == NULL)
 360                 return -EINVAL;
 361
 362         list = chain_head;
 363
 364         while (list != chain_tail) {
 365                 entry = list->data;
 366                 next = g_list_next(list);
 367
 368                 table->num_entries--;
 369                 table->size -= entry->entry->next_offset;
 370
 371                 table->entries = g_list_remove(table->entries, list->data);
 372
 373                 list = next;
 374         }
 375
 376         update_offsets(table);
 377
 378         return 0;
 379 }
 380
 381 static int connman_iptables_add_chain(struct connman_iptables *table,
 382                                         char *name)
 383 {
 384         GList *last;
 385         struct ipt_entry *entry_head;
 386         struct ipt_entry *entry_return;
 387         struct ipt_error_target *error;
 388         struct ipt_standard_target *standard;
 389         u_int16_t entry_head_size, entry_return_size;
 390
 391         last = g_list_last(table->entries);
 392
 393         /*
 394          * An empty chain is composed of:
 395          * - A head entry, with no match and an error target.
 396          *   The error target data is the chain name.
 397          * - A tail entry, with no match and a standard target.
 398          *   The standard target verdict is XT_RETURN (return to the
 399          *   caller).
 400          */
 401
 402         /* head entry */
 403         entry_head_size = sizeof(struct ipt_entry) +
 404                                 sizeof(struct ipt_error_target);
 405         entry_head = g_try_malloc0(entry_head_size);
 406         if (entry_head == NULL)
 407                 goto err;
 408
 409         memset(entry_head, 0, entry_head_size);
 410
 411         entry_head->target_offset = sizeof(struct ipt_entry);
 412         entry_head->next_offset = entry_head_size;
 413
 414         error = (struct ipt_error_target *) entry_head->elems;
 415         strcpy(error->t.u.user.name, IPT_ERROR_TARGET);
 416         error->t.u.user.target_size = ALIGN(sizeof(struct ipt_error_target));
 417         strcpy(error->error, name);
 418
 419         if (connman_add_entry(table, entry_head, last) < 0)
 420                 goto err;
 421
 422         /* tail entry */
 423         entry_return_size = sizeof(struct ipt_entry) +
 424                                 sizeof(struct ipt_standard_target);
 425         entry_return = g_try_malloc0(entry_return_size);
 426         if (entry_return == NULL)
 427                 goto err;
 428
 429         memset(entry_return, 0, entry_return_size);
 430
 431         entry_return->target_offset = sizeof(struct ipt_entry);
 432         entry_return->next_offset = entry_return_size;
 433
 434         standard = (struct ipt_standard_target *) entry_return->elems;
 435         standard->target.u.user.target_size =
 436                                 ALIGN(sizeof(struct ipt_standard_target));
 437         standard->verdict = XT_RETURN;
 438
 439         if (connman_add_entry(table, entry_return, last) < 0)
 440                 goto err;
 441
 442         return 0;
 443
 444 err:
 445         g_free(entry_head);
 446         g_free(entry_return);
 447
 448         return -ENOMEM;
 449 }
 450
 451 static struct ipt_entry *
 452 new_rule(struct connman_iptables *table,
 453                 char *target_name, struct xtables_target *xt_t,
 454                 char *match_name, struct xtables_match *xt_m)
 455 {
 456         struct ipt_entry *new_entry;
 457         size_t match_size, target_size;
 458         int is_builtin = is_builtin_target(target_name);
 459
 460         if (xt_m)
 461                 match_size = xt_m->m->u.match_size;
 462         else
 463                 match_size = 0;
 464
 465         if (xt_t)
 466                 target_size = ALIGN(xt_t->t->u.target_size);
 467         else
 468                 target_size = ALIGN(sizeof(struct xt_standard_target));
 469
 470         new_entry = g_try_malloc0(sizeof(struct ipt_entry) + target_size +
 471                                                                 match_size);
 472         if (new_entry == NULL)
 473                 return NULL;
 474
 475         new_entry->target_offset = sizeof(struct ipt_entry) + match_size;
 476         new_entry->next_offset = sizeof(struct ipt_entry) + target_size +
 477                                                                 match_size;
 478         if (xt_m) {
 479                 struct xt_entry_match *entry_match;
 480
 481                 entry_match = (struct xt_entry_match *)new_entry->elems;
 482                 memcpy(entry_match, xt_m->m, match_size);
 483         }
 484
 485         if (xt_t) {
 486                 struct xt_entry_target *entry_target;
 487
 488                 if (is_builtin) {
 489                         struct xt_standard_target *target;
 490
 491                         target = (struct xt_standard_target *)(xt_t->t);
 492                         strcpy(target->target.u.user.name, IPT_STANDARD_TARGET);
 493                         target->verdict = target_to_verdict(target_name);
 494                 }
 495
 496                 entry_target = ipt_get_target(new_entry);
 497                 memcpy(entry_target, xt_t->t, target_size);
 498         } else {
 499                 struct connman_iptables_entry *target_rule;
 500                 struct xt_standard_target *target;
 501                 GList *chain_head;
 502
 503                 /*
 504                  * This is a user defined target, i.e. a chain jump.
 505                  * We search for the chain head, and the target verdict
 506                  * is the first rule's offset on this chain.
 507                  * The offset is from the beginning of the table.
 508                  */
 509
 510                 chain_head = find_chain_head(table, target_name);
 511                 if (chain_head == NULL || chain_head->next == NULL) {
 512                         g_free(new_entry);
 513                         return NULL;
 514                 }
 515
 516                 target_rule = chain_head->next->data;
 517
 518                 target = (struct xt_standard_target *)ipt_get_target(new_entry);
 519                 strcpy(target->target.u.user.name, IPT_STANDARD_TARGET);
 520                 target->target.u.user.target_size = target_size;
 521                 target->verdict = target_rule->offset;
 522         }
 523
 524         return new_entry;
 525 }
 526
 527 static int
 528 connman_iptables_add_rule(struct connman_iptables *table, char *chain_name,
 529                                 char *target_name, struct xtables_target *xt_t,
 530                                 char *match_name, struct xtables_match *xt_m)
 531 {
 532         GList *chain_tail;
 533         struct ipt_entry *new_entry;
 534
 535         chain_tail = find_chain_tail(table, chain_name);
 536         if (chain_tail == NULL)
 537                 return -EINVAL;
 538
 539         new_entry = new_rule(table,
 540                                 target_name, xt_t,
 541                                 match_name, xt_m);
 542         if (new_entry == NULL)
 543                 return -EINVAL;
 544
 545         return connman_add_entry(table, new_entry, chain_tail->prev);
 546 }
 547
 548 static struct ipt_replace *
 549 connman_iptables_blob(struct connman_iptables *table)
 550 {
 551         struct ipt_replace *r;
 552         GList *list;
 553         struct connman_iptables_entry *e;
 554         unsigned char *entry_index;
 555
 556         r = g_try_malloc0(sizeof(struct ipt_replace) + table->size);
 557         if (r == NULL)
 558                 return NULL;
 559
 560         memset(r, 0, sizeof(*r) + table->size);
 561
 562         r->counters = g_try_malloc0(sizeof(struct xt_counters)
 563                                 * table->num_entries);
 564         if (r->counters == NULL) {
 565                 g_free(r);
 566                 return NULL;
 567         }
 568
 569         strcpy(r->name, table->info->name);
 570         r->num_entries = table->num_entries;
 571         r->size = table->size;
 572
 573         r->num_counters = table->old_entries;
 574         r->valid_hooks  = table->info->valid_hooks;
 575
 576         memcpy(r->hook_entry, table->info->hook_entry,
 577                                 sizeof(table->info->hook_entry));
 578         memcpy(r->underflow, table->info->underflow,
 579                                 sizeof(table->info->underflow));
 580
 581         entry_index = (unsigned char *)r->entries;
 582         for (list = table->entries; list; list = list->next) {
 583                 e = list->data;
 584
 585                 memcpy(entry_index, e->entry, e->entry->next_offset);
 586                 entry_index += e->entry->next_offset;
 587         }
 588
 589         return r;
 590 }
 591
 592 static void dump_target(struct connman_iptables *table,
 593                                 struct ipt_entry *entry)
 594
 595 {
 596         struct xtables_target *xt_t;
 597         struct xt_entry_target *target;
 598
 599         target = ipt_get_target(entry);
 600
 601         if (!strcmp(target->u.user.name, IPT_STANDARD_TARGET)) {
 602                 struct xt_standard_target *t;
 603
 604                 t = (struct xt_standard_target *)target;
 605
 606                 switch (t->verdict) {
 607                 case XT_RETURN:
 608                         printf("\ttarget RETURN\n");
 609                         break;
 610
 611                 case -NF_ACCEPT - 1:
 612                         printf("\ttarget ACCEPT\n");
 613                         break;
 614
 615                 case -NF_DROP - 1:
 616                         printf("\ttarget DROP\n");
 617                         break;
 618
 619                 case -NF_QUEUE - 1:
 620                         printf("\ttarget QUEUE\n");
 621                         break;
 622
 623                 case -NF_STOP - 1:
 624                         printf("\ttarget STOP\n");
 625                         break;
 626
 627                 default:
 628                         printf("\tJUMP @%p (0x%x)\n",
 629                                 (char*)table->blob_entries->entrytable +
 630                                 t->verdict, t->verdict);
 631                         break;
 632                 }
 633
 634                 xt_t = xtables_find_target(IPT_STANDARD_TARGET,
 635                                                 XTF_LOAD_MUST_SUCCEED);
 636
 637                 if(xt_t->print != NULL)
 638                         xt_t->print(NULL, target, 1);
 639         } else {
 640                 xt_t = xtables_find_target(target->u.user.name, XTF_TRY_LOAD);
 641                 if (xt_t == NULL) {
 642                         printf("\ttarget %s\n", target->u.user.name);
 643                         return;
 644                 }
 645
 646                 if(xt_t->print != NULL) {
 647                         printf("\ttarget ");
 648                         xt_t->print(NULL, target, 1);
 649                         printf("\n");
 650                 }
 651         }
 652 }
 653
 654 static void dump_match(struct connman_iptables *table, struct ipt_entry *entry)
 655 {
 656         struct xtables_match *xt_m;
 657         struct xt_entry_match *match;
 658
 659         if (entry->elems == (unsigned char *)entry + entry->target_offset)
 660                 return;
 661
 662         match = (struct xt_entry_match *) entry->elems;
 663
 664         if (!strlen(match->u.user.name))
 665                 return;
 666
 667         xt_m = xtables_find_match(match->u.user.name, XTF_TRY_LOAD, NULL);
 668         if (xt_m == NULL)
 669                 goto out;
 670
 671         if(xt_m->print != NULL) {
 672                 printf("\tmatch ");
 673                 xt_m->print(NULL, match, 1);
 674                 printf("\n");
 675
 676                 return;
 677         }
 678
 679 out:
 680         printf("\tmatch %s\n", match->u.user.name);
 681
 682 }
 683
 684 static int connman_iptables_dump_entry(struct ipt_entry *entry,
 685                                         struct connman_iptables *table)
 686 {
 687         struct xt_entry_target *target;
 688         unsigned int offset;
 689         int builtin;
 690
 691         offset = (char *)entry - (char *)table->blob_entries->entrytable;
 692         target = ipt_get_target(entry);
 693         builtin = is_hook_entry(table, entry);
 694
 695         if (entry_to_offset(table, entry) + entry->next_offset ==
 696                                         table->blob_entries->size) {
 697                 printf("End of CHAIN 0x%x\n", offset);
 698                 return 0;
 699         }
 700
 701         if (!strcmp(target->u.user.name, IPT_ERROR_TARGET)) {
 702                 printf("USER CHAIN (%s) %p  match %p  target %p  size %d\n",
 703                         target->data, entry, entry->elems,
 704                         (char *)entry + entry->target_offset,
 705                                 entry->next_offset);
 706
 707                 return 0;
 708         } else if (builtin >= 0) {
 709                 printf("CHAIN (%s) %p  match %p  target %p  size %d\n",
 710                         hooknames[builtin], entry, entry->elems,
 711                         (char *)entry + entry->target_offset,
 712                                 entry->next_offset);
 713         } else {
 714                 printf("RULE %p  match %p  target %p  size %d\n", entry,
 715                         entry->elems,
 716                         (char *)entry + entry->target_offset,
 717                                 entry->next_offset);
 718         }
 719
 720         dump_match(table, entry);
 721         dump_target(table, entry);
 722
 723         return 0;
 724 }
 725
 726 static void connman_iptables_dump(struct connman_iptables *table)
 727 {
 728         printf("%s valid_hooks=0x%08x, num_entries=%u, size=%u\n",
 729                 table->info->name,
 730                 table->info->valid_hooks, table->info->num_entries,
 731                 table->info->size);
 732
 733         ENTRY_ITERATE(table->blob_entries->entrytable,
 734                         table->blob_entries->size,
 735                         connman_iptables_dump_entry, table);
 736
 737 }
 738
 739 static int connman_iptables_get_entries(struct connman_iptables *table)
 740 {
 741         socklen_t entry_size;
 742
 743         entry_size = sizeof(struct ipt_get_entries) + table->info->size;
 744
 745         return getsockopt(table->ipt_sock, IPPROTO_IP, IPT_SO_GET_ENTRIES,
 746                                 table->blob_entries, &entry_size);
 747 }
 748
 749 static int connman_iptables_replace(struct connman_iptables *table,
 750                                         struct ipt_replace *r)
 751 {
 752         return setsockopt(table->ipt_sock, IPPROTO_IP, IPT_SO_SET_REPLACE, r,
 753                          sizeof(*r) + r->size);
 754 }
 755
 756 static void connman_iptables_cleanup(struct connman_iptables *table)
 757 {
 758         GList *list;
 759         struct connman_iptables_entry *entry;
 760
 761         close(table->ipt_sock);
 762
 763         for (list = table->entries; list; list = list->next) {
 764                 entry = list->data;
 765
 766                 g_free(entry->entry);
 767         }
 768
 769         g_free(table->info);
 770         g_free(table->blob_entries);
 771         g_free(table);
 772
 773         xtables_free_opts(1);
 774 }
 775
 776 static int connman_iptables_commit(struct connman_iptables *table)
 777 {
 778         struct ipt_replace *repl;
 779
 780         repl = connman_iptables_blob(table);
 781
 782         return connman_iptables_replace(table, repl);
 783 }
 784
 785 static int add_entry(struct ipt_entry *entry, struct connman_iptables *table)
 786 {
 787         struct ipt_entry *new_entry;
 788
 789         new_entry = g_try_malloc0(entry->next_offset);
 790         if (new_entry == NULL)
 791                 return -ENOMEM;
 792
 793         memcpy(new_entry, entry, entry->next_offset);
 794
 795         return connman_add_entry(table, new_entry, NULL);
 796 }
 797
 798 static struct connman_iptables *connman_iptables_init(const char *table_name)
 799 {
 800         struct connman_iptables *table;
 801         socklen_t s;
 802
 803         table =  g_try_new0(struct connman_iptables, 1);
 804         if (table == NULL)
 805                 return NULL;
 806
 807         table->info =  g_try_new0(struct ipt_getinfo, 1);
 808         if (table->info == NULL)
 809                 goto err;
 810
 811         table->ipt_sock = socket(AF_INET, SOCK_RAW, IPPROTO_RAW);
 812         if (table->ipt_sock < 0)
 813                 goto err;
 814
 815         s = sizeof(*table->info);
 816         strcpy(table->info->name, table_name);
 817         if (getsockopt(table->ipt_sock, IPPROTO_IP, IPT_SO_GET_INFO,
 818                                                 table->info, &s) < 0)
 819                 goto err;
 820
 821         table->blob_entries = g_try_malloc0(sizeof(struct ipt_get_entries) +
 822                                                 table->info->size);
 823         if (table->blob_entries == NULL)
 824                 goto err;
 825
 826         strcpy(table->blob_entries->name, table_name);
 827         table->blob_entries->size = table->info->size;
 828
 829         if (connman_iptables_get_entries(table) < 0)
 830                 goto err;
 831
 832         table->num_entries = 0;
 833         table->old_entries = table->info->num_entries;
 834         table->size = 0;
 835
 836         ENTRY_ITERATE(table->blob_entries->entrytable,
 837                         table->blob_entries->size,
 838                                 add_entry, table);
 839
 840
 841         return table;
 842
 843 err:
 844
 845         connman_iptables_cleanup(table);
 846
 847         return NULL;
 848 }
 849
 850
 851 static struct option connman_iptables_opts[] = {
 852         {.name = "append",        .has_arg = 1, .val = 'A'},
 853         {.name = "list",          .has_arg = 2, .val = 'L'},
 854         {.name = "new-chain",     .has_arg = 1, .val = 'N'},
 855         {.name = "delete-chain",  .has_arg = 1, .val = 'X'},
 856         {.name = "in-interface",  .has_arg = 1, .val = 'i'},
 857         {.name = "jump",          .has_arg = 1, .val = 'j'},
 858         {.name = "match",         .has_arg = 1, .val = 'm'},
 859         {.name = "out-interface", .has_arg = 1, .val = 'o'},
 860         {.name = "table",         .has_arg = 1, .val = 't'},
 861         {NULL},
 862 };
 863
 864 struct xtables_globals connman_iptables_globals = {
 865         .option_offset = 0,
 866         .opts = connman_iptables_opts,
 867         .orig_opts = connman_iptables_opts,
 868 };
 869
 870 int main(int argc, char *argv[])
 871 {
 872         struct connman_iptables *table;
 873         struct xtables_match *xt_m;
 874         struct xtables_target *xt_t;
 875         char *table_name, *chain, *new_chain, *match_name, *target_name;
 876         char *delete_chain;
 877         int c;
 878         size_t size;
 879         gboolean dump, invert, delete;
 880
 881         xtables_init_all(&connman_iptables_globals, NFPROTO_IPV4);
 882
 883         dump = FALSE;
 884         invert = FALSE;
 885         delete = FALSE;
 886         table_name = chain = new_chain = match_name = target_name = NULL;
 887         delete_chain = NULL;
 888         table = NULL;
 889         xt_m = NULL;
 890         xt_t = NULL;
 891
 892         while ((c = getopt_long(argc, argv,
 893            "-A:L::N:X:j:i:m:o:t:", connman_iptables_globals.opts, NULL)) != -1) {
 894                 switch (c) {
 895                 case 'A':
 896                         chain = optarg;
 897                         break;
 898
 899                 case 'L':
 900                         dump = true;
 901                         break;
 902
 903                 case 'N':
 904                         new_chain = optarg;
 905                         break;
 906
 907                 case 'X':
 908                         delete = true;
 909                         delete_chain = optarg;
 910                         break;
 911
 912                 case 'j':
 913                         target_name = optarg;
 914                         xt_t = xtables_find_target(target_name, XTF_TRY_LOAD);
 915
 916                         if (xt_t == NULL)
 917                                 break;
 918
 919                         size = ALIGN(sizeof(struct ipt_entry_target)) + xt_t->size;
 920
 921                         xt_t->t = g_try_malloc0(size);
 922                         if (xt_t->t == NULL)
 923                                 goto out;
 924                         xt_t->t->u.target_size = size;
 925                         strcpy(xt_t->t->u.user.name, target_name);
 926                         xt_t->t->u.user.revision = xt_t->revision;
 927                         if (xt_t->init != NULL)
 928                                 xt_t->init(xt_t->t);
 929                         connman_iptables_globals.opts =
 930                                 xtables_merge_options(connman_iptables_globals.opts,
 931                                                      xt_t->extra_opts,
 932                                                      &xt_t->option_offset);
 933                         if (connman_iptables_globals.opts == NULL)
 934                                 goto out;
 935
 936                         break;
 937
 938                 case 'i':
 939                         break;
 940
 941                 case 'm':
 942                         match_name = optarg;
 943
 944                         xt_m = xtables_find_match(optarg, XTF_LOAD_MUST_SUCCEED, NULL);
 945                         size = ALIGN(sizeof(struct ipt_entry_match)) + xt_m->size;
 946                         xt_m->m = g_try_malloc0(size);
 947                         if (xt_m == NULL)
 948                                 goto out;
 949                         xt_m->m->u.match_size = size;
 950                         strcpy(xt_m->m->u.user.name, xt_m->name);
 951                         xt_m->m->u.user.revision = xt_m->revision;
 952                         if (xt_m->init != NULL)
 953                                 xt_m->init(xt_m->m);
 954                         if (xt_m != xt_m->next) {
 955                                 connman_iptables_globals.opts =
 956                                         xtables_merge_options(connman_iptables_globals.opts,
 957                                                 xt_m->extra_opts,
 958                                                 &xt_m->option_offset);
 959                                 if (connman_iptables_globals.opts == NULL)
 960                                         goto out;
 961                         }
 962
 963                         break;
 964
 965                 case 'o':
 966                         break;
 967
 968                 case 't':
 969                         table_name = optarg;
 970                         break;
 971
 972                 case 1:
 973                         if (optarg[0] == '!' && optarg[1] == '\0') {
 974                                 if (invert)
 975                                         printf("Consecutive ! not allowed\n");
 976
 977                                 invert = TRUE;
 978                                 optarg[0] = '\0';
 979                                 continue;
 980                         }
 981
 982                         printf("Invalid option\n");
 983
 984                         return -1;
 985
 986                 default:
 987                         if (xt_t == NULL || xt_t->parse == NULL ||
 988                             !xt_t->parse(c - xt_t->option_offset, argv, invert,
 989                                         &xt_t->tflags, NULL, &xt_t->t)) {
 990                                 if (xt_m == NULL || xt_m->parse == NULL)
 991                                         break;
 992
 993                                 xt_m->parse(c - xt_m->option_offset, argv,
 994                                         invert, &xt_m->mflags, NULL, &xt_m->m);
 995                         }
 996
 997                         break;
 998                 }
 999         }
1000
1001         if (table_name == NULL)
1002                 table_name = "filter";
1003
1004         table = connman_iptables_init(table_name);
1005         if (table == NULL)
1006                 return -1;
1007
1008         if (delete) {
1009                 if (delete_chain == NULL)
1010                         goto out;
1011
1012                 printf("Delete chain %s\n", delete_chain);
1013
1014                 connman_iptables_delete_chain(table, delete_chain);
1015
1016                 goto commit;
1017         }
1018
1019         if (dump) {
1020                 connman_iptables_dump(table);
1021
1022                 return 0;
1023         }
1024
1025         if (chain && new_chain)
1026                 return -1;
1027
1028         if (new_chain) {
1029                 printf("New chain %s\n", new_chain);
1030
1031                 connman_iptables_add_chain(table, new_chain);
1032
1033                 goto commit;
1034         }
1035
1036         if (chain) {
1037                 if (target_name == NULL)
1038                         return -1;
1039
1040                 printf("Adding %s to %s (match %s)\n", target_name, chain, match_name);
1041
1042                 connman_iptables_add_rule(table, chain, target_name, xt_t,
1043                                         match_name, xt_m);
1044
1045                 goto commit;
1046         }
1047
1048 commit:
1049
1050         connman_iptables_commit(table);
1051
1052 out:
1053         connman_iptables_cleanup(table);
1054
1055         if (xt_t)
1056                 g_free(xt_t->t);
1057
1058         if (xt_m)
1059                 g_free(xt_m->m);
1060
1061         return 0;
1062 }