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 builtin;
  86         int std_target;
  87         int jump_offset;
  88
  89         struct ipt_entry *entry;
  90 };
  91
  92 struct connman_iptables {
  93         int ipt_sock;
  94
  95         struct ipt_getinfo *info;
  96         struct ipt_get_entries *blob_entries;
  97
  98         unsigned int num_entries;
  99         unsigned int old_entries;
 100         unsigned int size;
 101
 102         GList *entries;
 103 };
 104
 105
 106 static struct ipt_entry *get_entry(struct connman_iptables *table,
 107                                         unsigned int offset)
 108 {
 109         return (struct ipt_entry *)((char *)table->blob_entries->entrytable +
 110                                                                         offset);
 111 }
 112
 113 static int is_hook_entry(struct connman_iptables *table,
 114                                 struct ipt_entry *entry)
 115 {
 116         unsigned int i;
 117
 118         for (i = 0; i < NF_INET_NUMHOOKS; i++) {
 119                 if ((table->info->valid_hooks & (1 << i))
 120                 && get_entry(table, table->info->hook_entry[i]) == entry)
 121                         return i;
 122         }
 123
 124         return -1;
 125 }
 126
 127 static unsigned long entry_to_offset(struct connman_iptables *table,
 128                                         struct ipt_entry *entry)
 129 {
 130         return (void *)entry - (void *)table->blob_entries->entrytable;
 131 }
 132
 133 static int target_to_verdict(char *target_name)
 134 {
 135         if (!strcmp(target_name, LABEL_ACCEPT))
 136                 return -NF_ACCEPT - 1;
 137
 138         if (!strcmp(target_name, LABEL_DROP))
 139                 return -NF_DROP - 1;
 140
 141         if (!strcmp(target_name, LABEL_QUEUE))
 142                 return -NF_QUEUE - 1;
 143
 144         if (!strcmp(target_name, LABEL_RETURN))
 145                 return XT_RETURN;
 146
 147         return 0;
 148 }
 149
 150 static gboolean is_builtin_target(char *target_name)
 151 {
 152         if (!strcmp(target_name, LABEL_ACCEPT) ||
 153                 !strcmp(target_name, LABEL_DROP) ||
 154                 !strcmp(target_name, LABEL_QUEUE) ||
 155                 !strcmp(target_name, LABEL_RETURN))
 156                 return TRUE;
 157
 158         return FALSE;
 159 }
 160
 161 static gboolean is_chain(struct connman_iptables *table,
 162                                 struct connman_iptables_entry *e)
 163 {
 164         int builtin;
 165         struct ipt_entry *entry;
 166         struct xt_entry_target *target;
 167
 168         entry = e->entry;
 169         builtin = is_hook_entry(table, entry);
 170         if (builtin >= 0)
 171                 return TRUE;
 172
 173         target = ipt_get_target(entry);
 174         if (!strcmp(target->u.user.name, IPT_ERROR_TARGET))
 175                 return TRUE;
 176
 177         return FALSE;
 178 }
 179
 180 static GList *find_chain_tail(struct connman_iptables *table,
 181                                 char *chain_name)
 182 {
 183         GList *chain_head, *list;
 184         struct connman_iptables_entry *head, *tail;
 185         struct ipt_entry *entry;
 186         struct xt_entry_target *target;
 187         int builtin;
 188
 189         /* First we look for the head */
 190         for (list = table->entries; list; list = list->next) {
 191                 head = list->data;
 192                 entry = head->entry;
 193
 194                 /* Buit-in chain */
 195                 builtin = is_hook_entry(table, entry);
 196                 if (builtin >= 0 && !strcmp(hooknames[builtin], chain_name))
 197                         break;
 198
 199                 /* User defined chain */
 200                 target = ipt_get_target(entry);
 201                 if (!strcmp(target->u.user.name, IPT_ERROR_TARGET) &&
 202                     !strcmp((char *)target->data, chain_name))
 203                         break;
 204         }
 205
 206         if (list == NULL)
 207                 return NULL;
 208
 209         chain_head = list;
 210
 211         /* Then we look for the next chain */
 212         for (list = chain_head->next; list; list = list->next) {
 213                 tail = list->data;
 214                 entry = tail->entry;
 215
 216                 if (is_chain(table, tail))
 217                         return list;
 218         }
 219
 220         /* Nothing found, we return the table end */
 221         return g_list_last(table->entries);
 222 }
 223
 224 static int connman_add_entry(struct connman_iptables *table,
 225                                 struct ipt_entry *entry, GList *before)
 226 {
 227         struct connman_iptables_entry *e;
 228
 229         if (table == NULL)
 230                 return -1;
 231
 232         e = g_try_malloc0(sizeof(struct connman_iptables_entry));
 233         if (e == NULL)
 234                 return -1;
 235
 236         e->entry = entry;
 237
 238         table->entries = g_list_insert_before(table->entries, before, e);
 239         table->num_entries++;
 240         table->size += entry->next_offset;
 241
 242         return 0;
 243 }
 244
 245 static int connman_iptables_add_chain(struct connman_iptables *table,
 246                                         char *name)
 247 {
 248         GList *last;
 249         struct ipt_entry *entry_head;
 250         struct ipt_entry *entry_return;
 251         struct ipt_error_target *error;
 252         struct ipt_standard_target *standard;
 253         u_int16_t entry_head_size, entry_return_size;
 254
 255         last = g_list_last(table->entries);
 256
 257         /*
 258          * An empty chain is composed of:
 259          * - A head entry, with no match and an error target.
 260          *   The error target data is the chain name.
 261          * - A tail entry, with no match and a standard target.
 262          *   The standard target verdict is XT_RETURN (return to the
 263          *   caller).
 264          */
 265
 266         /* head entry */
 267         entry_head_size = sizeof(struct ipt_entry) +
 268                                 sizeof(struct ipt_error_target);
 269         entry_head = g_try_malloc0(entry_head_size);
 270         if (entry_head == NULL)
 271                 goto err;
 272
 273         memset(entry_head, 0, entry_head_size);
 274
 275         entry_head->target_offset = sizeof(struct ipt_entry);
 276         entry_head->next_offset = entry_head_size;
 277
 278         error = (struct ipt_error_target *) entry_head->elems;
 279         strcpy(error->t.u.user.name, IPT_ERROR_TARGET);
 280         error->t.u.user.target_size = ALIGN(sizeof(struct ipt_error_target));
 281         strcpy(error->error, name);
 282
 283         if (connman_add_entry(table, entry_head, last) < 0)
 284                 goto err;
 285
 286         /* tail entry */
 287         entry_return_size = sizeof(struct ipt_entry) +
 288                                 sizeof(struct ipt_standard_target);
 289         entry_return = g_try_malloc0(entry_return_size);
 290         if (entry_return == NULL)
 291                 goto err;
 292
 293         memset(entry_return, 0, entry_return_size);
 294
 295         entry_return->target_offset = sizeof(struct ipt_entry);
 296         entry_return->next_offset = entry_return_size;
 297
 298         standard = (struct ipt_standard_target *) entry_return->elems;
 299         standard->target.u.user.target_size =
 300                                 ALIGN(sizeof(struct ipt_standard_target));
 301         standard->verdict = XT_RETURN;
 302
 303         if (connman_add_entry(table, entry_return, last) < 0)
 304                 goto err;
 305
 306         return 0;
 307
 308 err:
 309         g_free(entry_head);
 310         g_free(entry_return);
 311
 312         return -ENOMEM;
 313 }
 314
 315 static struct ipt_entry *
 316 new_builtin_rule(char *target_name, struct xtables_match *xt_m)
 317 {
 318         struct ipt_entry *new_entry;
 319         size_t match_size, target_size;
 320         struct xt_entry_match *entry_match;
 321         struct xt_standard_target *target;
 322
 323         if (xt_m)
 324                 match_size = xt_m->m->u.match_size;
 325         else
 326                 match_size = 0;
 327
 328         target_size = ALIGN(sizeof(struct xt_standard_target));
 329
 330         new_entry = g_try_malloc0(sizeof(struct ipt_entry) + target_size +
 331                                                                 match_size);
 332         if (new_entry == NULL)
 333                 return NULL;
 334
 335         new_entry->target_offset = sizeof(struct ipt_entry) + match_size;
 336         new_entry->next_offset = sizeof(struct ipt_entry) + target_size +
 337                                                                 match_size;
 338         if (xt_m) {
 339                 entry_match = (struct xt_entry_match *)new_entry->elems;
 340                 memcpy(entry_match, xt_m->m, match_size);
 341         }
 342
 343         target = (struct xt_standard_target *)(new_entry->elems + match_size);
 344         strcpy(target->target.u.user.name, IPT_STANDARD_TARGET);
 345         target->target.u.user.target_size =
 346                                 ALIGN(sizeof(struct ipt_standard_target));
 347         target->verdict = target_to_verdict(target_name);
 348
 349         return new_entry;
 350 }
 351
 352 static struct ipt_entry *
 353 new_custom_rule(struct xtables_target *xt_t, struct xtables_match *xt_m)
 354 {
 355         struct ipt_entry *new_entry;
 356         size_t match_size, target_size;
 357         struct xt_entry_match *entry_match;
 358         struct xt_entry_target *entry_target;
 359
 360         if (xt_m)
 361                 match_size = xt_m->m->u.match_size;
 362         else
 363                 match_size = 0;
 364
 365         if (xt_t)
 366                 target_size = ALIGN(xt_t->t->u.target_size);
 367         else
 368                 target_size = 0;
 369
 370         new_entry = g_try_malloc0(sizeof(struct ipt_entry) + target_size +
 371                                                                 match_size);
 372         if (new_entry == NULL)
 373                 return NULL;
 374
 375         new_entry->target_offset = sizeof(struct ipt_entry) + match_size;
 376         new_entry->next_offset = sizeof(struct ipt_entry) + target_size +
 377                                                                 match_size;
 378         if (xt_m) {
 379                 entry_match = (struct xt_entry_match *)new_entry->elems;
 380                 memcpy(entry_match, xt_m->m, match_size);
 381         }
 382
 383         if (xt_t) {
 384                 entry_target = (struct xt_entry_target *)(new_entry->elems +
 385                                                                 match_size);
 386                 memcpy(entry_target, xt_t->t, target_size);
 387         }
 388
 389         return new_entry;
 390 }
 391
 392 static struct ipt_entry *
 393 new_rule(char *target_name, struct xtables_target *xt_t,
 394                 char *match_name, struct xtables_match *xt_m)
 395 {
 396         struct ipt_entry *new_entry;
 397
 398         if (is_builtin_target(target_name))
 399                 new_entry = new_builtin_rule(target_name, xt_m);
 400         else
 401                 new_entry = new_custom_rule(xt_t, xt_m);
 402
 403         return new_entry;
 404 }
 405
 406 static int
 407 connman_iptables_add_rule(struct connman_iptables *table, char *chain_name,
 408                                 char *target_name, struct xtables_target *xt_t,
 409                                 char *match_name, struct xtables_match *xt_m)
 410 {
 411         GList *chain_tail;
 412         struct ipt_entry *new_entry;
 413
 414         chain_tail = find_chain_tail(table, chain_name);
 415         if (chain_tail == NULL)
 416                 return -EINVAL;
 417
 418         new_entry = new_rule(target_name, xt_t,
 419                                 match_name, xt_m);
 420         if (new_entry == NULL)
 421                 return -EINVAL;
 422
 423         return connman_add_entry(table, new_entry, chain_tail->prev);
 424 }
 425
 426 static struct ipt_replace *
 427 connman_iptables_blob(struct connman_iptables *table)
 428 {
 429         struct ipt_replace *r;
 430         GList *list;
 431         struct connman_iptables_entry *e;
 432         unsigned char *entry_index;
 433
 434         r = g_try_malloc0(sizeof(struct ipt_replace) + table->size);
 435         if (r == NULL)
 436                 return NULL;
 437
 438         memset(r, 0, sizeof(*r) + table->size);
 439
 440         r->counters = g_try_malloc0(sizeof(struct xt_counters)
 441                                 * table->num_entries);
 442         if (r->counters == NULL) {
 443                 g_free(r);
 444                 return NULL;
 445         }
 446
 447         strcpy(r->name, table->info->name);
 448         r->num_entries = table->num_entries;
 449         r->size = table->size;
 450
 451         r->num_counters = table->old_entries;
 452         r->valid_hooks  = table->info->valid_hooks;
 453
 454         memcpy(r->hook_entry, table->info->hook_entry,
 455                                 sizeof(table->info->hook_entry));
 456         memcpy(r->underflow, table->info->underflow,
 457                                 sizeof(table->info->underflow));
 458
 459         entry_index = (unsigned char *)r->entries;
 460         for (list = table->entries; list; list = list->next) {
 461                 e = list->data;
 462
 463                 memcpy(entry_index, e->entry, e->entry->next_offset);
 464                 entry_index += e->entry->next_offset;
 465         }
 466
 467         return r;
 468 }
 469
 470 static void dump_target(struct connman_iptables *table,
 471                                 struct ipt_entry *entry)
 472
 473 {
 474         struct xtables_target *xt_t;
 475         struct xt_entry_target *target;
 476
 477         target = ipt_get_target(entry);
 478
 479         if (!strcmp(target->u.user.name, IPT_STANDARD_TARGET)) {
 480                 struct xt_standard_target *t;
 481
 482                 t = (struct xt_standard_target *)target;
 483
 484                 switch (t->verdict) {
 485                 case XT_RETURN:
 486                         printf("\ttarget RETURN\n");
 487                         break;
 488
 489                 case -NF_ACCEPT - 1:
 490                         printf("\ttarget ACCEPT\n");
 491                         break;
 492
 493                 case -NF_DROP - 1:
 494                         printf("\ttarget DROP\n");
 495                         break;
 496
 497                 case -NF_QUEUE - 1:
 498                         printf("\ttarget QUEUE\n");
 499                         break;
 500
 501                 case -NF_STOP - 1:
 502                         printf("\ttarget STOP\n");
 503                         break;
 504
 505                 default:
 506                         printf("\tJUMP @%p (0x%x)\n",
 507                                 (char*)table->blob_entries->entrytable +
 508                                 t->verdict, t->verdict);
 509                         break;
 510                 }
 511
 512                 xt_t = xtables_find_target(IPT_STANDARD_TARGET,
 513                                                 XTF_LOAD_MUST_SUCCEED);
 514
 515                 if(xt_t->print != NULL)
 516                         xt_t->print(NULL, target, 1);
 517         } else {
 518                 xt_t = xtables_find_target(target->u.user.name, XTF_TRY_LOAD);
 519                 if (xt_t == NULL) {
 520                         printf("\ttarget %s\n", target->u.user.name);
 521                         return;
 522                 }
 523
 524                 if(xt_t->print != NULL) {
 525                         printf("\ttarget ");
 526                         xt_t->print(NULL, target, 1);
 527                         printf("\n");
 528                 }
 529         }
 530 }
 531
 532 static void dump_match(struct connman_iptables *table, struct ipt_entry *entry)
 533 {
 534         struct xtables_match *xt_m;
 535         struct xt_entry_match *match;
 536
 537         if (entry->elems == (unsigned char *)entry + entry->target_offset)
 538                 return;
 539
 540         match = (struct xt_entry_match *) entry->elems;
 541
 542         if (!strlen(match->u.user.name))
 543                 return;
 544
 545         xt_m = xtables_find_match(match->u.user.name, XTF_TRY_LOAD, NULL);
 546         if (xt_m == NULL)
 547                 goto out;
 548
 549         if(xt_m->print != NULL) {
 550                 printf("\tmatch ");
 551                 xt_m->print(NULL, match, 1);
 552                 printf("\n");
 553
 554                 return;
 555         }
 556
 557 out:
 558         printf("\tmatch %s\n", match->u.user.name);
 559
 560 }
 561
 562 static int connman_iptables_dump_entry(struct ipt_entry *entry,
 563                                         struct connman_iptables *table)
 564 {
 565         struct xt_entry_target *target;
 566         unsigned int offset;
 567         int builtin;
 568
 569         offset = (char *)entry - (char *)table->blob_entries->entrytable;
 570         target = ipt_get_target(entry);
 571         builtin = is_hook_entry(table, entry);
 572
 573         if (entry_to_offset(table, entry) + entry->next_offset ==
 574                                         table->blob_entries->size) {
 575                 printf("End of CHAIN 0x%x\n", offset);
 576                 return 0;
 577         }
 578
 579         if (!strcmp(target->u.user.name, IPT_ERROR_TARGET)) {
 580                 printf("USER CHAIN (%s) %p  match %p  target %p  size %d\n",
 581                         target->data, entry, entry->elems,
 582                         (char *)entry + entry->target_offset,
 583                                 entry->next_offset);
 584
 585                 return 0;
 586         } else if (builtin >= 0) {
 587                 printf("CHAIN (%s) %p  match %p  target %p  size %d\n",
 588                         hooknames[builtin], entry, entry->elems,
 589                         (char *)entry + entry->target_offset,
 590                                 entry->next_offset);
 591         } else {
 592                 printf("RULE %p  match %p  target %p  size %d\n", entry,
 593                         entry->elems,
 594                         (char *)entry + entry->target_offset,
 595                                 entry->next_offset);
 596         }
 597
 598         dump_match(table, entry);
 599         dump_target(table, entry);
 600
 601         return 0;
 602 }
 603
 604 static void connman_iptables_dump(struct connman_iptables *table)
 605 {
 606         printf("%s valid_hooks=0x%08x, num_entries=%u, size=%u\n",
 607                 table->info->name,
 608                 table->info->valid_hooks, table->info->num_entries,
 609                 table->info->size);
 610
 611         ENTRY_ITERATE(table->blob_entries->entrytable,
 612                         table->blob_entries->size,
 613                         connman_iptables_dump_entry, table);
 614
 615 }
 616
 617 static int connman_iptables_get_entries(struct connman_iptables *table)
 618 {
 619         socklen_t entry_size;
 620
 621         entry_size = sizeof(struct ipt_get_entries) + table->info->size;
 622
 623         return getsockopt(table->ipt_sock, IPPROTO_IP, IPT_SO_GET_ENTRIES,
 624                                 table->blob_entries, &entry_size);
 625 }
 626
 627 static int connman_iptables_replace(struct connman_iptables *table,
 628                                         struct ipt_replace *r)
 629 {
 630         return setsockopt(table->ipt_sock, IPPROTO_IP, IPT_SO_SET_REPLACE, r,
 631                          sizeof(*r) + r->size);
 632 }
 633
 634 static void connman_iptables_cleanup(struct connman_iptables *table)
 635 {
 636         close(table->ipt_sock);
 637         g_free(table->info);
 638         g_free(table->blob_entries);
 639         g_free(table);
 640
 641         xtables_free_opts(1);
 642 }
 643
 644 static int connman_iptables_commit(struct connman_iptables *table)
 645 {
 646         struct ipt_replace *repl;
 647
 648         repl = connman_iptables_blob(table);
 649
 650         return connman_iptables_replace(table, repl);
 651 }
 652
 653 static int add_entry(struct ipt_entry *entry, struct connman_iptables *table)
 654 {
 655         return connman_add_entry(table, entry, NULL);
 656 }
 657
 658 static struct connman_iptables *connman_iptables_init(const char *table_name)
 659 {
 660         struct connman_iptables *table;
 661         socklen_t s;
 662
 663         table =  g_try_new0(struct connman_iptables, 1);
 664         if (table == NULL)
 665                 return NULL;
 666
 667         table->info =  g_try_new0(struct ipt_getinfo, 1);
 668         if (table->info == NULL)
 669                 goto err;
 670
 671         table->ipt_sock = socket(AF_INET, SOCK_RAW, IPPROTO_RAW);
 672         if (table->ipt_sock < 0)
 673                 goto err;
 674
 675         s = sizeof(*table->info);
 676         strcpy(table->info->name, table_name);
 677         if (getsockopt(table->ipt_sock, IPPROTO_IP, IPT_SO_GET_INFO,
 678                                                 table->info, &s) < 0)
 679                 goto err;
 680
 681         table->blob_entries = g_try_malloc0(sizeof(struct ipt_get_entries) +
 682                                                 table->info->size);
 683         if (table->blob_entries == NULL)
 684                 goto err;
 685
 686         strcpy(table->blob_entries->name, table_name);
 687         table->blob_entries->size = table->info->size;
 688
 689         if (connman_iptables_get_entries(table) < 0)
 690                 goto err;
 691
 692         table->num_entries = 0;
 693         table->old_entries = table->info->num_entries;
 694         table->size = 0;
 695
 696         ENTRY_ITERATE(table->blob_entries->entrytable,
 697                         table->blob_entries->size,
 698                                 add_entry, table);
 699
 700
 701         return table;
 702
 703 err:
 704
 705         connman_iptables_cleanup(table);
 706
 707         return NULL;
 708 }
 709
 710
 711 static struct option connman_iptables_opts[] = {
 712         {.name = "append",        .has_arg = 1, .val = 'A'},
 713         {.name = "list",          .has_arg = 2, .val = 'L'},
 714         {.name = "new-chain",     .has_arg = 1, .val = 'N'},
 715         {.name = "in-interface",  .has_arg = 1, .val = 'i'},
 716         {.name = "jump",          .has_arg = 1, .val = 'j'},
 717         {.name = "match",         .has_arg = 1, .val = 'm'},
 718         {.name = "out-interface", .has_arg = 1, .val = 'o'},
 719         {.name = "table",         .has_arg = 1, .val = 't'},
 720         {NULL},
 721 };
 722
 723 struct xtables_globals connman_iptables_globals = {
 724         .option_offset = 0,
 725         .opts = connman_iptables_opts,
 726         .orig_opts = connman_iptables_opts,
 727 };
 728
 729 int main(int argc, char *argv[])
 730 {
 731         struct connman_iptables *table;
 732         struct xtables_match *xt_m;
 733         struct xtables_target *xt_t;
 734         char *table_name, *chain, *new_chain, *match_name, *target_name;
 735         int c;
 736         size_t size;
 737         gboolean dump, invert;
 738
 739         xtables_init_all(&connman_iptables_globals, NFPROTO_IPV4);
 740
 741         dump = FALSE;
 742         invert = FALSE;
 743         table_name = chain = new_chain = match_name = target_name = NULL;
 744         table = NULL;
 745         xt_m = NULL;
 746         xt_t = NULL;
 747
 748         while ((c = getopt_long(argc, argv,
 749            "-A:L::N:j:i:m:o:t:", connman_iptables_globals.opts, NULL)) != -1) {
 750                 switch (c) {
 751                 case 'A':
 752                         chain = optarg;
 753                         break;
 754
 755                 case 'L':
 756                         dump = TRUE;
 757                         break;
 758
 759                 case 'N':
 760                         new_chain = optarg;
 761                         break;
 762
 763                 case 'j':
 764                         target_name = optarg;
 765                         xt_t = xtables_find_target(target_name, XTF_TRY_LOAD);
 766
 767                         if (xt_t == NULL)
 768                                 break;
 769
 770                         size = ALIGN(sizeof(struct ipt_entry_target)) + xt_t->size;
 771
 772                         xt_t->t = g_try_malloc0(size);
 773                         if (xt_t->t == NULL)
 774                                 goto out;
 775                         xt_t->t->u.target_size = size;
 776                         strcpy(xt_t->t->u.user.name, target_name);
 777                         xt_t->t->u.user.revision = xt_t->revision;
 778                         if (xt_t->init != NULL)
 779                                 xt_t->init(xt_t->t);
 780                         connman_iptables_globals.opts =
 781                                 xtables_merge_options(connman_iptables_globals.opts,
 782                                                      xt_t->extra_opts,
 783                                                      &xt_t->option_offset);
 784                         if (connman_iptables_globals.opts == NULL)
 785                                 goto out;
 786
 787                         break;
 788
 789                 case 'i':
 790                         break;
 791
 792                 case 'm':
 793                         match_name = optarg;
 794
 795                         xt_m = xtables_find_match(optarg, XTF_LOAD_MUST_SUCCEED, NULL);
 796                         size = ALIGN(sizeof(struct ipt_entry_match)) + xt_m->size;
 797                         xt_m->m = g_try_malloc0(size);
 798                         if (xt_m == NULL)
 799                                 goto out;
 800                         xt_m->m->u.match_size = size;
 801                         strcpy(xt_m->m->u.user.name, xt_m->name);
 802                         xt_m->m->u.user.revision = xt_m->revision;
 803                         if (xt_m->init != NULL)
 804                                 xt_m->init(xt_m->m);
 805                         if (xt_m != xt_m->next) {
 806                                 connman_iptables_globals.opts =
 807                                         xtables_merge_options(connman_iptables_globals.opts,
 808                                                 xt_m->extra_opts,
 809                                                 &xt_m->option_offset);
 810                                 if (connman_iptables_globals.opts == NULL)
 811                                         goto out;
 812                         }
 813
 814                         break;
 815
 816                 case 'o':
 817                         break;
 818
 819                 case 't':
 820                         table_name = optarg;
 821                         break;
 822
 823                 case 1:
 824                         if (optarg[0] == '!' && optarg[1] == '\0') {
 825                                 if (invert)
 826                                         printf("Consecutive ! not allowed\n");
 827
 828                                 invert = TRUE;
 829                                 optarg[0] = '\0';
 830                                 continue;
 831                         }
 832
 833                         printf("Invalid option\n");
 834
 835                         return -1;
 836
 837                 default:
 838                         if (xt_t == NULL || xt_t->parse == NULL ||
 839                             !xt_t->parse(c - xt_t->option_offset, argv, invert,
 840                                         &xt_t->tflags, NULL, &xt_t->t)) {
 841                                 if (xt_m == NULL || xt_m->parse == NULL)
 842                                         break;
 843
 844                                 xt_m->parse(c - xt_m->option_offset, argv,
 845                                         invert, &xt_m->mflags, NULL, &xt_m->m);
 846                         }
 847
 848                         break;
 849                 }
 850         }
 851
 852         if (table_name == NULL)
 853                 table_name = "filter";
 854
 855         table = connman_iptables_init(table_name);
 856         if (table == NULL)
 857                 return -1;
 858
 859         if (dump) {
 860                 connman_iptables_dump(table);
 861
 862                 return 0;
 863         }
 864
 865         if (chain && new_chain)
 866                 return -1;
 867
 868         if (new_chain) {
 869                 printf("New chain %s\n", new_chain);
 870
 871                 connman_iptables_add_chain(table, new_chain);
 872
 873                 goto commit;
 874         }
 875
 876         if (chain) {
 877                 if (target_name == NULL)
 878                         return -1;
 879
 880                 printf("Adding %s to %s (match %s)\n", target_name, chain, match_name);
 881
 882                 connman_iptables_add_rule(table, chain, target_name, xt_t,
 883                                         match_name, xt_m);
 884
 885                 goto commit;
 886         }
 887
 888 commit:
 889
 890         connman_iptables_commit(table);
 891
 892 out:
 893         connman_iptables_cleanup(table);
 894
 895         if (xt_t)
 896                 g_free(xt_t->t);
 897
 898         if (xt_m)
 899                 g_free(xt_m->m);
 900
 901         return 0;
 902 }