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_add_chain(struct connman_iptables *table,
 349                                         char *name)
 350 {
 351         GList *last;
 352         struct ipt_entry *entry_head;
 353         struct ipt_entry *entry_return;
 354         struct ipt_error_target *error;
 355         struct ipt_standard_target *standard;
 356         u_int16_t entry_head_size, entry_return_size;
 357
 358         last = g_list_last(table->entries);
 359
 360         /*
 361          * An empty chain is composed of:
 362          * - A head entry, with no match and an error target.
 363          *   The error target data is the chain name.
 364          * - A tail entry, with no match and a standard target.
 365          *   The standard target verdict is XT_RETURN (return to the
 366          *   caller).
 367          */
 368
 369         /* head entry */
 370         entry_head_size = sizeof(struct ipt_entry) +
 371                                 sizeof(struct ipt_error_target);
 372         entry_head = g_try_malloc0(entry_head_size);
 373         if (entry_head == NULL)
 374                 goto err;
 375
 376         memset(entry_head, 0, entry_head_size);
 377
 378         entry_head->target_offset = sizeof(struct ipt_entry);
 379         entry_head->next_offset = entry_head_size;
 380
 381         error = (struct ipt_error_target *) entry_head->elems;
 382         strcpy(error->t.u.user.name, IPT_ERROR_TARGET);
 383         error->t.u.user.target_size = ALIGN(sizeof(struct ipt_error_target));
 384         strcpy(error->error, name);
 385
 386         if (connman_add_entry(table, entry_head, last) < 0)
 387                 goto err;
 388
 389         /* tail entry */
 390         entry_return_size = sizeof(struct ipt_entry) +
 391                                 sizeof(struct ipt_standard_target);
 392         entry_return = g_try_malloc0(entry_return_size);
 393         if (entry_return == NULL)
 394                 goto err;
 395
 396         memset(entry_return, 0, entry_return_size);
 397
 398         entry_return->target_offset = sizeof(struct ipt_entry);
 399         entry_return->next_offset = entry_return_size;
 400
 401         standard = (struct ipt_standard_target *) entry_return->elems;
 402         standard->target.u.user.target_size =
 403                                 ALIGN(sizeof(struct ipt_standard_target));
 404         standard->verdict = XT_RETURN;
 405
 406         if (connman_add_entry(table, entry_return, last) < 0)
 407                 goto err;
 408
 409         return 0;
 410
 411 err:
 412         g_free(entry_head);
 413         g_free(entry_return);
 414
 415         return -ENOMEM;
 416 }
 417
 418 static struct ipt_entry *
 419 new_rule(struct connman_iptables *table,
 420                 char *target_name, struct xtables_target *xt_t,
 421                 char *match_name, struct xtables_match *xt_m)
 422 {
 423         struct ipt_entry *new_entry;
 424         size_t match_size, target_size;
 425         int is_builtin = is_builtin_target(target_name);
 426
 427         if (xt_m)
 428                 match_size = xt_m->m->u.match_size;
 429         else
 430                 match_size = 0;
 431
 432         if (xt_t)
 433                 target_size = ALIGN(xt_t->t->u.target_size);
 434         else
 435                 target_size = ALIGN(sizeof(struct xt_standard_target));
 436
 437         new_entry = g_try_malloc0(sizeof(struct ipt_entry) + target_size +
 438                                                                 match_size);
 439         if (new_entry == NULL)
 440                 return NULL;
 441
 442         new_entry->target_offset = sizeof(struct ipt_entry) + match_size;
 443         new_entry->next_offset = sizeof(struct ipt_entry) + target_size +
 444                                                                 match_size;
 445         if (xt_m) {
 446                 struct xt_entry_match *entry_match;
 447
 448                 entry_match = (struct xt_entry_match *)new_entry->elems;
 449                 memcpy(entry_match, xt_m->m, match_size);
 450         }
 451
 452         if (xt_t) {
 453                 struct xt_entry_target *entry_target;
 454
 455                 if (is_builtin) {
 456                         struct xt_standard_target *target;
 457
 458                         target = (struct xt_standard_target *)(xt_t->t);
 459                         strcpy(target->target.u.user.name, IPT_STANDARD_TARGET);
 460                         target->verdict = target_to_verdict(target_name);
 461                 }
 462
 463                 entry_target = ipt_get_target(new_entry);
 464                 memcpy(entry_target, xt_t->t, target_size);
 465         } else {
 466                 struct connman_iptables_entry *target_rule;
 467                 struct xt_standard_target *target;
 468                 GList *chain_head;
 469
 470                 /*
 471                  * This is a user defined target, i.e. a chain jump.
 472                  * We search for the chain head, and the target verdict
 473                  * is the first rule's offset on this chain.
 474                  * The offset is from the beginning of the table.
 475                  */
 476
 477                 chain_head = find_chain_head(table, target_name);
 478                 if (chain_head == NULL || chain_head->next == NULL) {
 479                         g_free(new_entry);
 480                         return NULL;
 481                 }
 482
 483                 target_rule = chain_head->next->data;
 484
 485                 target = (struct xt_standard_target *)ipt_get_target(new_entry);
 486                 strcpy(target->target.u.user.name, IPT_STANDARD_TARGET);
 487                 target->target.u.user.target_size = target_size;
 488                 target->verdict = target_rule->offset;
 489         }
 490
 491         return new_entry;
 492 }
 493
 494 static int
 495 connman_iptables_add_rule(struct connman_iptables *table, char *chain_name,
 496                                 char *target_name, struct xtables_target *xt_t,
 497                                 char *match_name, struct xtables_match *xt_m)
 498 {
 499         GList *chain_tail;
 500         struct ipt_entry *new_entry;
 501
 502         chain_tail = find_chain_tail(table, chain_name);
 503         if (chain_tail == NULL)
 504                 return -EINVAL;
 505
 506         new_entry = new_rule(table,
 507                                 target_name, xt_t,
 508                                 match_name, xt_m);
 509         if (new_entry == NULL)
 510                 return -EINVAL;
 511
 512         return connman_add_entry(table, new_entry, chain_tail->prev);
 513 }
 514
 515 static struct ipt_replace *
 516 connman_iptables_blob(struct connman_iptables *table)
 517 {
 518         struct ipt_replace *r;
 519         GList *list;
 520         struct connman_iptables_entry *e;
 521         unsigned char *entry_index;
 522
 523         r = g_try_malloc0(sizeof(struct ipt_replace) + table->size);
 524         if (r == NULL)
 525                 return NULL;
 526
 527         memset(r, 0, sizeof(*r) + table->size);
 528
 529         r->counters = g_try_malloc0(sizeof(struct xt_counters)
 530                                 * table->num_entries);
 531         if (r->counters == NULL) {
 532                 g_free(r);
 533                 return NULL;
 534         }
 535
 536         strcpy(r->name, table->info->name);
 537         r->num_entries = table->num_entries;
 538         r->size = table->size;
 539
 540         r->num_counters = table->old_entries;
 541         r->valid_hooks  = table->info->valid_hooks;
 542
 543         memcpy(r->hook_entry, table->info->hook_entry,
 544                                 sizeof(table->info->hook_entry));
 545         memcpy(r->underflow, table->info->underflow,
 546                                 sizeof(table->info->underflow));
 547
 548         entry_index = (unsigned char *)r->entries;
 549         for (list = table->entries; list; list = list->next) {
 550                 e = list->data;
 551
 552                 memcpy(entry_index, e->entry, e->entry->next_offset);
 553                 entry_index += e->entry->next_offset;
 554         }
 555
 556         return r;
 557 }
 558
 559 static void dump_target(struct connman_iptables *table,
 560                                 struct ipt_entry *entry)
 561
 562 {
 563         struct xtables_target *xt_t;
 564         struct xt_entry_target *target;
 565
 566         target = ipt_get_target(entry);
 567
 568         if (!strcmp(target->u.user.name, IPT_STANDARD_TARGET)) {
 569                 struct xt_standard_target *t;
 570
 571                 t = (struct xt_standard_target *)target;
 572
 573                 switch (t->verdict) {
 574                 case XT_RETURN:
 575                         printf("\ttarget RETURN\n");
 576                         break;
 577
 578                 case -NF_ACCEPT - 1:
 579                         printf("\ttarget ACCEPT\n");
 580                         break;
 581
 582                 case -NF_DROP - 1:
 583                         printf("\ttarget DROP\n");
 584                         break;
 585
 586                 case -NF_QUEUE - 1:
 587                         printf("\ttarget QUEUE\n");
 588                         break;
 589
 590                 case -NF_STOP - 1:
 591                         printf("\ttarget STOP\n");
 592                         break;
 593
 594                 default:
 595                         printf("\tJUMP @%p (0x%x)\n",
 596                                 (char*)table->blob_entries->entrytable +
 597                                 t->verdict, t->verdict);
 598                         break;
 599                 }
 600
 601                 xt_t = xtables_find_target(IPT_STANDARD_TARGET,
 602                                                 XTF_LOAD_MUST_SUCCEED);
 603
 604                 if(xt_t->print != NULL)
 605                         xt_t->print(NULL, target, 1);
 606         } else {
 607                 xt_t = xtables_find_target(target->u.user.name, XTF_TRY_LOAD);
 608                 if (xt_t == NULL) {
 609                         printf("\ttarget %s\n", target->u.user.name);
 610                         return;
 611                 }
 612
 613                 if(xt_t->print != NULL) {
 614                         printf("\ttarget ");
 615                         xt_t->print(NULL, target, 1);
 616                         printf("\n");
 617                 }
 618         }
 619 }
 620
 621 static void dump_match(struct connman_iptables *table, struct ipt_entry *entry)
 622 {
 623         struct xtables_match *xt_m;
 624         struct xt_entry_match *match;
 625
 626         if (entry->elems == (unsigned char *)entry + entry->target_offset)
 627                 return;
 628
 629         match = (struct xt_entry_match *) entry->elems;
 630
 631         if (!strlen(match->u.user.name))
 632                 return;
 633
 634         xt_m = xtables_find_match(match->u.user.name, XTF_TRY_LOAD, NULL);
 635         if (xt_m == NULL)
 636                 goto out;
 637
 638         if(xt_m->print != NULL) {
 639                 printf("\tmatch ");
 640                 xt_m->print(NULL, match, 1);
 641                 printf("\n");
 642
 643                 return;
 644         }
 645
 646 out:
 647         printf("\tmatch %s\n", match->u.user.name);
 648
 649 }
 650
 651 static int connman_iptables_dump_entry(struct ipt_entry *entry,
 652                                         struct connman_iptables *table)
 653 {
 654         struct xt_entry_target *target;
 655         unsigned int offset;
 656         int builtin;
 657
 658         offset = (char *)entry - (char *)table->blob_entries->entrytable;
 659         target = ipt_get_target(entry);
 660         builtin = is_hook_entry(table, entry);
 661
 662         if (entry_to_offset(table, entry) + entry->next_offset ==
 663                                         table->blob_entries->size) {
 664                 printf("End of CHAIN 0x%x\n", offset);
 665                 return 0;
 666         }
 667
 668         if (!strcmp(target->u.user.name, IPT_ERROR_TARGET)) {
 669                 printf("USER CHAIN (%s) %p  match %p  target %p  size %d\n",
 670                         target->data, entry, entry->elems,
 671                         (char *)entry + entry->target_offset,
 672                                 entry->next_offset);
 673
 674                 return 0;
 675         } else if (builtin >= 0) {
 676                 printf("CHAIN (%s) %p  match %p  target %p  size %d\n",
 677                         hooknames[builtin], entry, entry->elems,
 678                         (char *)entry + entry->target_offset,
 679                                 entry->next_offset);
 680         } else {
 681                 printf("RULE %p  match %p  target %p  size %d\n", entry,
 682                         entry->elems,
 683                         (char *)entry + entry->target_offset,
 684                                 entry->next_offset);
 685         }
 686
 687         dump_match(table, entry);
 688         dump_target(table, entry);
 689
 690         return 0;
 691 }
 692
 693 static void connman_iptables_dump(struct connman_iptables *table)
 694 {
 695         printf("%s valid_hooks=0x%08x, num_entries=%u, size=%u\n",
 696                 table->info->name,
 697                 table->info->valid_hooks, table->info->num_entries,
 698                 table->info->size);
 699
 700         ENTRY_ITERATE(table->blob_entries->entrytable,
 701                         table->blob_entries->size,
 702                         connman_iptables_dump_entry, table);
 703
 704 }
 705
 706 static int connman_iptables_get_entries(struct connman_iptables *table)
 707 {
 708         socklen_t entry_size;
 709
 710         entry_size = sizeof(struct ipt_get_entries) + table->info->size;
 711
 712         return getsockopt(table->ipt_sock, IPPROTO_IP, IPT_SO_GET_ENTRIES,
 713                                 table->blob_entries, &entry_size);
 714 }
 715
 716 static int connman_iptables_replace(struct connman_iptables *table,
 717                                         struct ipt_replace *r)
 718 {
 719         return setsockopt(table->ipt_sock, IPPROTO_IP, IPT_SO_SET_REPLACE, r,
 720                          sizeof(*r) + r->size);
 721 }
 722
 723 static void connman_iptables_cleanup(struct connman_iptables *table)
 724 {
 725         GList *list;
 726         struct connman_iptables_entry *entry;
 727
 728         close(table->ipt_sock);
 729
 730         for (list = table->entries; list; list = list->next) {
 731                 entry = list->data;
 732
 733                 g_free(entry->entry);
 734         }
 735
 736         g_free(table->info);
 737         g_free(table->blob_entries);
 738         g_free(table);
 739
 740         xtables_free_opts(1);
 741 }
 742
 743 static int connman_iptables_commit(struct connman_iptables *table)
 744 {
 745         struct ipt_replace *repl;
 746
 747         repl = connman_iptables_blob(table);
 748
 749         return connman_iptables_replace(table, repl);
 750 }
 751
 752 static int add_entry(struct ipt_entry *entry, struct connman_iptables *table)
 753 {
 754         struct ipt_entry *new_entry;
 755
 756         new_entry = g_try_malloc0(entry->next_offset);
 757         if (new_entry == NULL)
 758                 return -ENOMEM;
 759
 760         memcpy(new_entry, entry, entry->next_offset);
 761
 762         return connman_add_entry(table, new_entry, NULL);
 763 }
 764
 765 static struct connman_iptables *connman_iptables_init(const char *table_name)
 766 {
 767         struct connman_iptables *table;
 768         socklen_t s;
 769
 770         table =  g_try_new0(struct connman_iptables, 1);
 771         if (table == NULL)
 772                 return NULL;
 773
 774         table->info =  g_try_new0(struct ipt_getinfo, 1);
 775         if (table->info == NULL)
 776                 goto err;
 777
 778         table->ipt_sock = socket(AF_INET, SOCK_RAW, IPPROTO_RAW);
 779         if (table->ipt_sock < 0)
 780                 goto err;
 781
 782         s = sizeof(*table->info);
 783         strcpy(table->info->name, table_name);
 784         if (getsockopt(table->ipt_sock, IPPROTO_IP, IPT_SO_GET_INFO,
 785                                                 table->info, &s) < 0)
 786                 goto err;
 787
 788         table->blob_entries = g_try_malloc0(sizeof(struct ipt_get_entries) +
 789                                                 table->info->size);
 790         if (table->blob_entries == NULL)
 791                 goto err;
 792
 793         strcpy(table->blob_entries->name, table_name);
 794         table->blob_entries->size = table->info->size;
 795
 796         if (connman_iptables_get_entries(table) < 0)
 797                 goto err;
 798
 799         table->num_entries = 0;
 800         table->old_entries = table->info->num_entries;
 801         table->size = 0;
 802
 803         ENTRY_ITERATE(table->blob_entries->entrytable,
 804                         table->blob_entries->size,
 805                                 add_entry, table);
 806
 807
 808         return table;
 809
 810 err:
 811
 812         connman_iptables_cleanup(table);
 813
 814         return NULL;
 815 }
 816
 817
 818 static struct option connman_iptables_opts[] = {
 819         {.name = "append",        .has_arg = 1, .val = 'A'},
 820         {.name = "list",          .has_arg = 2, .val = 'L'},
 821         {.name = "new-chain",     .has_arg = 1, .val = 'N'},
 822         {.name = "in-interface",  .has_arg = 1, .val = 'i'},
 823         {.name = "jump",          .has_arg = 1, .val = 'j'},
 824         {.name = "match",         .has_arg = 1, .val = 'm'},
 825         {.name = "out-interface", .has_arg = 1, .val = 'o'},
 826         {.name = "table",         .has_arg = 1, .val = 't'},
 827         {NULL},
 828 };
 829
 830 struct xtables_globals connman_iptables_globals = {
 831         .option_offset = 0,
 832         .opts = connman_iptables_opts,
 833         .orig_opts = connman_iptables_opts,
 834 };
 835
 836 int main(int argc, char *argv[])
 837 {
 838         struct connman_iptables *table;
 839         struct xtables_match *xt_m;
 840         struct xtables_target *xt_t;
 841         char *table_name, *chain, *new_chain, *match_name, *target_name;
 842         int c;
 843         size_t size;
 844         gboolean dump, invert;
 845
 846         xtables_init_all(&connman_iptables_globals, NFPROTO_IPV4);
 847
 848         dump = FALSE;
 849         invert = FALSE;
 850         table_name = chain = new_chain = match_name = target_name = NULL;
 851         table = NULL;
 852         xt_m = NULL;
 853         xt_t = NULL;
 854
 855         while ((c = getopt_long(argc, argv,
 856            "-A:L::N:j:i:m:o:t:", connman_iptables_globals.opts, NULL)) != -1) {
 857                 switch (c) {
 858                 case 'A':
 859                         chain = optarg;
 860                         break;
 861
 862                 case 'L':
 863                         dump = TRUE;
 864                         break;
 865
 866                 case 'N':
 867                         new_chain = optarg;
 868                         break;
 869
 870                 case 'j':
 871                         target_name = optarg;
 872                         xt_t = xtables_find_target(target_name, XTF_TRY_LOAD);
 873
 874                         if (xt_t == NULL)
 875                                 break;
 876
 877                         size = ALIGN(sizeof(struct ipt_entry_target)) + xt_t->size;
 878
 879                         xt_t->t = g_try_malloc0(size);
 880                         if (xt_t->t == NULL)
 881                                 goto out;
 882                         xt_t->t->u.target_size = size;
 883                         strcpy(xt_t->t->u.user.name, target_name);
 884                         xt_t->t->u.user.revision = xt_t->revision;
 885                         if (xt_t->init != NULL)
 886                                 xt_t->init(xt_t->t);
 887                         connman_iptables_globals.opts =
 888                                 xtables_merge_options(connman_iptables_globals.opts,
 889                                                      xt_t->extra_opts,
 890                                                      &xt_t->option_offset);
 891                         if (connman_iptables_globals.opts == NULL)
 892                                 goto out;
 893
 894                         break;
 895
 896                 case 'i':
 897                         break;
 898
 899                 case 'm':
 900                         match_name = optarg;
 901
 902                         xt_m = xtables_find_match(optarg, XTF_LOAD_MUST_SUCCEED, NULL);
 903                         size = ALIGN(sizeof(struct ipt_entry_match)) + xt_m->size;
 904                         xt_m->m = g_try_malloc0(size);
 905                         if (xt_m == NULL)
 906                                 goto out;
 907                         xt_m->m->u.match_size = size;
 908                         strcpy(xt_m->m->u.user.name, xt_m->name);
 909                         xt_m->m->u.user.revision = xt_m->revision;
 910                         if (xt_m->init != NULL)
 911                                 xt_m->init(xt_m->m);
 912                         if (xt_m != xt_m->next) {
 913                                 connman_iptables_globals.opts =
 914                                         xtables_merge_options(connman_iptables_globals.opts,
 915                                                 xt_m->extra_opts,
 916                                                 &xt_m->option_offset);
 917                                 if (connman_iptables_globals.opts == NULL)
 918                                         goto out;
 919                         }
 920
 921                         break;
 922
 923                 case 'o':
 924                         break;
 925
 926                 case 't':
 927                         table_name = optarg;
 928                         break;
 929
 930                 case 1:
 931                         if (optarg[0] == '!' && optarg[1] == '\0') {
 932                                 if (invert)
 933                                         printf("Consecutive ! not allowed\n");
 934
 935                                 invert = TRUE;
 936                                 optarg[0] = '\0';
 937                                 continue;
 938                         }
 939
 940                         printf("Invalid option\n");
 941
 942                         return -1;
 943
 944                 default:
 945                         if (xt_t == NULL || xt_t->parse == NULL ||
 946                             !xt_t->parse(c - xt_t->option_offset, argv, invert,
 947                                         &xt_t->tflags, NULL, &xt_t->t)) {
 948                                 if (xt_m == NULL || xt_m->parse == NULL)
 949                                         break;
 950
 951                                 xt_m->parse(c - xt_m->option_offset, argv,
 952                                         invert, &xt_m->mflags, NULL, &xt_m->m);
 953                         }
 954
 955                         break;
 956                 }
 957         }
 958
 959         if (table_name == NULL)
 960                 table_name = "filter";
 961
 962         table = connman_iptables_init(table_name);
 963         if (table == NULL)
 964                 return -1;
 965
 966         if (dump) {
 967                 connman_iptables_dump(table);
 968
 969                 return 0;
 970         }
 971
 972         if (chain && new_chain)
 973                 return -1;
 974
 975         if (new_chain) {
 976                 printf("New chain %s\n", new_chain);
 977
 978                 connman_iptables_add_chain(table, new_chain);
 979
 980                 goto commit;
 981         }
 982
 983         if (chain) {
 984                 if (target_name == NULL)
 985                         return -1;
 986
 987                 printf("Adding %s to %s (match %s)\n", target_name, chain, match_name);
 988
 989                 connman_iptables_add_rule(table, chain, target_name, xt_t,
 990                                         match_name, xt_m);
 991
 992                 goto commit;
 993         }
 994
 995 commit:
 996
 997         connman_iptables_commit(table);
 998
 999 out:
1000         connman_iptables_cleanup(table);
1001
1002         if (xt_t)
1003                 g_free(xt_t->t);
1004
1005         if (xt_m)
1006                 g_free(xt_m->m);
1007
1008         return 0;
1009 }