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_rule(char *target_name, struct xtables_target *xt_t,
 317                 char *match_name, struct xtables_match *xt_m)
 318 {
 319         struct ipt_entry *new_entry;
 320         size_t match_size, target_size;
 321         int is_builtin = is_builtin_target(target_name);
 322
 323         if (xt_m)
 324                 match_size = xt_m->m->u.match_size;
 325         else
 326                 match_size = 0;
 327
 328         if (xt_t)
 329                 target_size = ALIGN(xt_t->t->u.target_size);
 330         else
 331                 target_size = 0;
 332
 333         new_entry = g_try_malloc0(sizeof(struct ipt_entry) + target_size +
 334                                                                 match_size);
 335         if (new_entry == NULL)
 336                 return NULL;
 337
 338         new_entry->target_offset = sizeof(struct ipt_entry) + match_size;
 339         new_entry->next_offset = sizeof(struct ipt_entry) + target_size +
 340                                                                 match_size;
 341         if (xt_m) {
 342                 struct xt_entry_match *entry_match;
 343
 344                 entry_match = (struct xt_entry_match *)new_entry->elems;
 345                 memcpy(entry_match, xt_m->m, match_size);
 346         }
 347
 348         if (xt_t) {
 349                 struct xt_entry_target *entry_target;
 350
 351                 if (is_builtin) {
 352                         struct xt_standard_target *target;
 353
 354                         target = (struct xt_standard_target *)(xt_t->t);
 355                         strcpy(target->target.u.user.name, IPT_STANDARD_TARGET);
 356                         target->verdict = target_to_verdict(target_name);
 357                 }
 358
 359                 entry_target = ipt_get_target(new_entry);
 360                 memcpy(entry_target, xt_t->t, target_size);
 361         }
 362
 363         return new_entry;
 364 }
 365
 366 static int
 367 connman_iptables_add_rule(struct connman_iptables *table, char *chain_name,
 368                                 char *target_name, struct xtables_target *xt_t,
 369                                 char *match_name, struct xtables_match *xt_m)
 370 {
 371         GList *chain_tail;
 372         struct ipt_entry *new_entry;
 373
 374         chain_tail = find_chain_tail(table, chain_name);
 375         if (chain_tail == NULL)
 376                 return -EINVAL;
 377
 378         new_entry = new_rule(target_name, xt_t,
 379                                 match_name, xt_m);
 380         if (new_entry == NULL)
 381                 return -EINVAL;
 382
 383         return connman_add_entry(table, new_entry, chain_tail->prev);
 384 }
 385
 386 static struct ipt_replace *
 387 connman_iptables_blob(struct connman_iptables *table)
 388 {
 389         struct ipt_replace *r;
 390         GList *list;
 391         struct connman_iptables_entry *e;
 392         unsigned char *entry_index;
 393
 394         r = g_try_malloc0(sizeof(struct ipt_replace) + table->size);
 395         if (r == NULL)
 396                 return NULL;
 397
 398         memset(r, 0, sizeof(*r) + table->size);
 399
 400         r->counters = g_try_malloc0(sizeof(struct xt_counters)
 401                                 * table->num_entries);
 402         if (r->counters == NULL) {
 403                 g_free(r);
 404                 return NULL;
 405         }
 406
 407         strcpy(r->name, table->info->name);
 408         r->num_entries = table->num_entries;
 409         r->size = table->size;
 410
 411         r->num_counters = table->old_entries;
 412         r->valid_hooks  = table->info->valid_hooks;
 413
 414         memcpy(r->hook_entry, table->info->hook_entry,
 415                                 sizeof(table->info->hook_entry));
 416         memcpy(r->underflow, table->info->underflow,
 417                                 sizeof(table->info->underflow));
 418
 419         entry_index = (unsigned char *)r->entries;
 420         for (list = table->entries; list; list = list->next) {
 421                 e = list->data;
 422
 423                 memcpy(entry_index, e->entry, e->entry->next_offset);
 424                 entry_index += e->entry->next_offset;
 425         }
 426
 427         return r;
 428 }
 429
 430 static void dump_target(struct connman_iptables *table,
 431                                 struct ipt_entry *entry)
 432
 433 {
 434         struct xtables_target *xt_t;
 435         struct xt_entry_target *target;
 436
 437         target = ipt_get_target(entry);
 438
 439         if (!strcmp(target->u.user.name, IPT_STANDARD_TARGET)) {
 440                 struct xt_standard_target *t;
 441
 442                 t = (struct xt_standard_target *)target;
 443
 444                 switch (t->verdict) {
 445                 case XT_RETURN:
 446                         printf("\ttarget RETURN\n");
 447                         break;
 448
 449                 case -NF_ACCEPT - 1:
 450                         printf("\ttarget ACCEPT\n");
 451                         break;
 452
 453                 case -NF_DROP - 1:
 454                         printf("\ttarget DROP\n");
 455                         break;
 456
 457                 case -NF_QUEUE - 1:
 458                         printf("\ttarget QUEUE\n");
 459                         break;
 460
 461                 case -NF_STOP - 1:
 462                         printf("\ttarget STOP\n");
 463                         break;
 464
 465                 default:
 466                         printf("\tJUMP @%p (0x%x)\n",
 467                                 (char*)table->blob_entries->entrytable +
 468                                 t->verdict, t->verdict);
 469                         break;
 470                 }
 471
 472                 xt_t = xtables_find_target(IPT_STANDARD_TARGET,
 473                                                 XTF_LOAD_MUST_SUCCEED);
 474
 475                 if(xt_t->print != NULL)
 476                         xt_t->print(NULL, target, 1);
 477         } else {
 478                 xt_t = xtables_find_target(target->u.user.name, XTF_TRY_LOAD);
 479                 if (xt_t == NULL) {
 480                         printf("\ttarget %s\n", target->u.user.name);
 481                         return;
 482                 }
 483
 484                 if(xt_t->print != NULL) {
 485                         printf("\ttarget ");
 486                         xt_t->print(NULL, target, 1);
 487                         printf("\n");
 488                 }
 489         }
 490 }
 491
 492 static void dump_match(struct connman_iptables *table, struct ipt_entry *entry)
 493 {
 494         struct xtables_match *xt_m;
 495         struct xt_entry_match *match;
 496
 497         if (entry->elems == (unsigned char *)entry + entry->target_offset)
 498                 return;
 499
 500         match = (struct xt_entry_match *) entry->elems;
 501
 502         if (!strlen(match->u.user.name))
 503                 return;
 504
 505         xt_m = xtables_find_match(match->u.user.name, XTF_TRY_LOAD, NULL);
 506         if (xt_m == NULL)
 507                 goto out;
 508
 509         if(xt_m->print != NULL) {
 510                 printf("\tmatch ");
 511                 xt_m->print(NULL, match, 1);
 512                 printf("\n");
 513
 514                 return;
 515         }
 516
 517 out:
 518         printf("\tmatch %s\n", match->u.user.name);
 519
 520 }
 521
 522 static int connman_iptables_dump_entry(struct ipt_entry *entry,
 523                                         struct connman_iptables *table)
 524 {
 525         struct xt_entry_target *target;
 526         unsigned int offset;
 527         int builtin;
 528
 529         offset = (char *)entry - (char *)table->blob_entries->entrytable;
 530         target = ipt_get_target(entry);
 531         builtin = is_hook_entry(table, entry);
 532
 533         if (entry_to_offset(table, entry) + entry->next_offset ==
 534                                         table->blob_entries->size) {
 535                 printf("End of CHAIN 0x%x\n", offset);
 536                 return 0;
 537         }
 538
 539         if (!strcmp(target->u.user.name, IPT_ERROR_TARGET)) {
 540                 printf("USER CHAIN (%s) %p  match %p  target %p  size %d\n",
 541                         target->data, entry, entry->elems,
 542                         (char *)entry + entry->target_offset,
 543                                 entry->next_offset);
 544
 545                 return 0;
 546         } else if (builtin >= 0) {
 547                 printf("CHAIN (%s) %p  match %p  target %p  size %d\n",
 548                         hooknames[builtin], entry, entry->elems,
 549                         (char *)entry + entry->target_offset,
 550                                 entry->next_offset);
 551         } else {
 552                 printf("RULE %p  match %p  target %p  size %d\n", entry,
 553                         entry->elems,
 554                         (char *)entry + entry->target_offset,
 555                                 entry->next_offset);
 556         }
 557
 558         dump_match(table, entry);
 559         dump_target(table, entry);
 560
 561         return 0;
 562 }
 563
 564 static void connman_iptables_dump(struct connman_iptables *table)
 565 {
 566         printf("%s valid_hooks=0x%08x, num_entries=%u, size=%u\n",
 567                 table->info->name,
 568                 table->info->valid_hooks, table->info->num_entries,
 569                 table->info->size);
 570
 571         ENTRY_ITERATE(table->blob_entries->entrytable,
 572                         table->blob_entries->size,
 573                         connman_iptables_dump_entry, table);
 574
 575 }
 576
 577 static int connman_iptables_get_entries(struct connman_iptables *table)
 578 {
 579         socklen_t entry_size;
 580
 581         entry_size = sizeof(struct ipt_get_entries) + table->info->size;
 582
 583         return getsockopt(table->ipt_sock, IPPROTO_IP, IPT_SO_GET_ENTRIES,
 584                                 table->blob_entries, &entry_size);
 585 }
 586
 587 static int connman_iptables_replace(struct connman_iptables *table,
 588                                         struct ipt_replace *r)
 589 {
 590         return setsockopt(table->ipt_sock, IPPROTO_IP, IPT_SO_SET_REPLACE, r,
 591                          sizeof(*r) + r->size);
 592 }
 593
 594 static void connman_iptables_cleanup(struct connman_iptables *table)
 595 {
 596         close(table->ipt_sock);
 597         g_free(table->info);
 598         g_free(table->blob_entries);
 599         g_free(table);
 600
 601         xtables_free_opts(1);
 602 }
 603
 604 static int connman_iptables_commit(struct connman_iptables *table)
 605 {
 606         struct ipt_replace *repl;
 607
 608         repl = connman_iptables_blob(table);
 609
 610         return connman_iptables_replace(table, repl);
 611 }
 612
 613 static int add_entry(struct ipt_entry *entry, struct connman_iptables *table)
 614 {
 615         return connman_add_entry(table, entry, NULL);
 616 }
 617
 618 static struct connman_iptables *connman_iptables_init(const char *table_name)
 619 {
 620         struct connman_iptables *table;
 621         socklen_t s;
 622
 623         table =  g_try_new0(struct connman_iptables, 1);
 624         if (table == NULL)
 625                 return NULL;
 626
 627         table->info =  g_try_new0(struct ipt_getinfo, 1);
 628         if (table->info == NULL)
 629                 goto err;
 630
 631         table->ipt_sock = socket(AF_INET, SOCK_RAW, IPPROTO_RAW);
 632         if (table->ipt_sock < 0)
 633                 goto err;
 634
 635         s = sizeof(*table->info);
 636         strcpy(table->info->name, table_name);
 637         if (getsockopt(table->ipt_sock, IPPROTO_IP, IPT_SO_GET_INFO,
 638                                                 table->info, &s) < 0)
 639                 goto err;
 640
 641         table->blob_entries = g_try_malloc0(sizeof(struct ipt_get_entries) +
 642                                                 table->info->size);
 643         if (table->blob_entries == NULL)
 644                 goto err;
 645
 646         strcpy(table->blob_entries->name, table_name);
 647         table->blob_entries->size = table->info->size;
 648
 649         if (connman_iptables_get_entries(table) < 0)
 650                 goto err;
 651
 652         table->num_entries = 0;
 653         table->old_entries = table->info->num_entries;
 654         table->size = 0;
 655
 656         ENTRY_ITERATE(table->blob_entries->entrytable,
 657                         table->blob_entries->size,
 658                                 add_entry, table);
 659
 660
 661         return table;
 662
 663 err:
 664
 665         connman_iptables_cleanup(table);
 666
 667         return NULL;
 668 }
 669
 670
 671 static struct option connman_iptables_opts[] = {
 672         {.name = "append",        .has_arg = 1, .val = 'A'},
 673         {.name = "list",          .has_arg = 2, .val = 'L'},
 674         {.name = "new-chain",     .has_arg = 1, .val = 'N'},
 675         {.name = "in-interface",  .has_arg = 1, .val = 'i'},
 676         {.name = "jump",          .has_arg = 1, .val = 'j'},
 677         {.name = "match",         .has_arg = 1, .val = 'm'},
 678         {.name = "out-interface", .has_arg = 1, .val = 'o'},
 679         {.name = "table",         .has_arg = 1, .val = 't'},
 680         {NULL},
 681 };
 682
 683 struct xtables_globals connman_iptables_globals = {
 684         .option_offset = 0,
 685         .opts = connman_iptables_opts,
 686         .orig_opts = connman_iptables_opts,
 687 };
 688
 689 int main(int argc, char *argv[])
 690 {
 691         struct connman_iptables *table;
 692         struct xtables_match *xt_m;
 693         struct xtables_target *xt_t;
 694         char *table_name, *chain, *new_chain, *match_name, *target_name;
 695         int c;
 696         size_t size;
 697         gboolean dump, invert;
 698
 699         xtables_init_all(&connman_iptables_globals, NFPROTO_IPV4);
 700
 701         dump = FALSE;
 702         invert = FALSE;
 703         table_name = chain = new_chain = match_name = target_name = NULL;
 704         table = NULL;
 705         xt_m = NULL;
 706         xt_t = NULL;
 707
 708         while ((c = getopt_long(argc, argv,
 709            "-A:L::N:j:i:m:o:t:", connman_iptables_globals.opts, NULL)) != -1) {
 710                 switch (c) {
 711                 case 'A':
 712                         chain = optarg;
 713                         break;
 714
 715                 case 'L':
 716                         dump = TRUE;
 717                         break;
 718
 719                 case 'N':
 720                         new_chain = optarg;
 721                         break;
 722
 723                 case 'j':
 724                         target_name = optarg;
 725                         xt_t = xtables_find_target(target_name, XTF_TRY_LOAD);
 726
 727                         if (xt_t == NULL)
 728                                 break;
 729
 730                         size = ALIGN(sizeof(struct ipt_entry_target)) + xt_t->size;
 731
 732                         xt_t->t = g_try_malloc0(size);
 733                         if (xt_t->t == NULL)
 734                                 goto out;
 735                         xt_t->t->u.target_size = size;
 736                         strcpy(xt_t->t->u.user.name, target_name);
 737                         xt_t->t->u.user.revision = xt_t->revision;
 738                         if (xt_t->init != NULL)
 739                                 xt_t->init(xt_t->t);
 740                         connman_iptables_globals.opts =
 741                                 xtables_merge_options(connman_iptables_globals.opts,
 742                                                      xt_t->extra_opts,
 743                                                      &xt_t->option_offset);
 744                         if (connman_iptables_globals.opts == NULL)
 745                                 goto out;
 746
 747                         break;
 748
 749                 case 'i':
 750                         break;
 751
 752                 case 'm':
 753                         match_name = optarg;
 754
 755                         xt_m = xtables_find_match(optarg, XTF_LOAD_MUST_SUCCEED, NULL);
 756                         size = ALIGN(sizeof(struct ipt_entry_match)) + xt_m->size;
 757                         xt_m->m = g_try_malloc0(size);
 758                         if (xt_m == NULL)
 759                                 goto out;
 760                         xt_m->m->u.match_size = size;
 761                         strcpy(xt_m->m->u.user.name, xt_m->name);
 762                         xt_m->m->u.user.revision = xt_m->revision;
 763                         if (xt_m->init != NULL)
 764                                 xt_m->init(xt_m->m);
 765                         if (xt_m != xt_m->next) {
 766                                 connman_iptables_globals.opts =
 767                                         xtables_merge_options(connman_iptables_globals.opts,
 768                                                 xt_m->extra_opts,
 769                                                 &xt_m->option_offset);
 770                                 if (connman_iptables_globals.opts == NULL)
 771                                         goto out;
 772                         }
 773
 774                         break;
 775
 776                 case 'o':
 777                         break;
 778
 779                 case 't':
 780                         table_name = optarg;
 781                         break;
 782
 783                 case 1:
 784                         if (optarg[0] == '!' && optarg[1] == '\0') {
 785                                 if (invert)
 786                                         printf("Consecutive ! not allowed\n");
 787
 788                                 invert = TRUE;
 789                                 optarg[0] = '\0';
 790                                 continue;
 791                         }
 792
 793                         printf("Invalid option\n");
 794
 795                         return -1;
 796
 797                 default:
 798                         if (xt_t == NULL || xt_t->parse == NULL ||
 799                             !xt_t->parse(c - xt_t->option_offset, argv, invert,
 800                                         &xt_t->tflags, NULL, &xt_t->t)) {
 801                                 if (xt_m == NULL || xt_m->parse == NULL)
 802                                         break;
 803
 804                                 xt_m->parse(c - xt_m->option_offset, argv,
 805                                         invert, &xt_m->mflags, NULL, &xt_m->m);
 806                         }
 807
 808                         break;
 809                 }
 810         }
 811
 812         if (table_name == NULL)
 813                 table_name = "filter";
 814
 815         table = connman_iptables_init(table_name);
 816         if (table == NULL)
 817                 return -1;
 818
 819         if (dump) {
 820                 connman_iptables_dump(table);
 821
 822                 return 0;
 823         }
 824
 825         if (chain && new_chain)
 826                 return -1;
 827
 828         if (new_chain) {
 829                 printf("New chain %s\n", new_chain);
 830
 831                 connman_iptables_add_chain(table, new_chain);
 832
 833                 goto commit;
 834         }
 835
 836         if (chain) {
 837                 if (target_name == NULL)
 838                         return -1;
 839
 840                 printf("Adding %s to %s (match %s)\n", target_name, chain, match_name);
 841
 842                 connman_iptables_add_rule(table, chain, target_name, xt_t,
 843                                         match_name, xt_m);
 844
 845                 goto commit;
 846         }
 847
 848 commit:
 849
 850         connman_iptables_commit(table);
 851
 852 out:
 853         connman_iptables_cleanup(table);
 854
 855         if (xt_t)
 856                 g_free(xt_t->t);
 857
 858         if (xt_m)
 859                 g_free(xt_m->m);
 860
 861         return 0;
 862 }