src/helper/helper-nfacct-rule.c

   1 /*
   2  * Copyright (c) 2016 Samsung Electronics Co., Ltd.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  * http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 #include <errno.h>
  18 #include <inttypes.h>
  19 #include <stdbool.h>
  20 #include <stdlib.h>
  21 #include <string.h>
  22 #include <sys/types.h>
  23 #include <sys/wait.h>
  24 #include <unistd.h>
  25 #include <arpa/inet.h>
  26
  27 #include "counter.h"
  28 #include "helper-nfacct-rule.h"
  29 #include "helper-iptables.h"
  30
  31 #include "configure_stub.h"
  32
  33 #define IPTABLES "/usr/sbin/iptables"
  34 #define IP6TABLES "/usr/sbin/ip6tables"
  35 #define IPTABLES_CHECK "-C"
  36 #define APPEND "-A"
  37 #define DELETE "-D"
  38 #define INSERT "-I"
  39
  40 #define NFACCT_NAME_MOD " -m nfacct --nfacct-name %s"
  41 #define REJECT_RULE "REJECT"
  42 #define ACCEPT_RULE "ACCEPT"
  43 #define OUT_RULE "OUTPUT"
  44 #define IN_RULE "INPUT"
  45 #define FORWARD_RULE "FORWARD"
  46
  47 /* TODO idea to use the same rule both for BLOCK (REJECT) and WARNING (ACCEPT) */
  48 #define RULE_APP_OUT "%s -w %s OUTPUT -o %s -m cgroup --cgroup %u %s %s"
  49 #define RULE_APP_IN "%s -w %s INPUT -i %s -m cgroup --cgroup %u %s %s"
  50
  51 /* iptables -w [I/A/D] [OUTPUT/FORWARD/INPUT] -o/-i iface -m nfacct --nfacct-name name -j ACCEPT/REJECT */
  52
  53 #define RULE_IFACE_OUT "%s -w %s %s -o %s %s %s"
  54 #define RULE_IFACE_IN "%s -w %s %s -i %s %s  %s"
  55
  56 #define NFNL_SUBSYS_ACCT                7
  57 #define BUF_SIZE_FOR_ERR 100
  58
  59 static void prepare_netlink_msg(struct genl *req, int type, int flag)
  60 {
  61         int seq = time(NULL);
  62         memset(req, 0, sizeof(struct genl));
  63         req->n.nlmsg_len = NLMSG_LENGTH(GENL_HDRLEN);
  64         req->n.nlmsg_type = (NFNL_SUBSYS_ACCT << 8) | type;
  65         req->n.nlmsg_flags = NLM_F_REQUEST | flag;
  66         req->n.nlmsg_seq = seq;
  67 }
  68
  69 static void add_value_attr(struct genl *req, const void *data, int len,
  70                            int type)
  71 {
  72         int payload;
  73         /* get tail */
  74         struct nlattr *na = (struct nlattr *)((char *)req +
  75                                               NLMSG_ALIGN(req->n.nlmsg_len));
  76
  77         na->nla_type = type;
  78         payload = len + NLA_HDRLEN;
  79         na->nla_len = payload;
  80         memcpy(NLA_DATA(na), data, len);
  81         req->n.nlmsg_len += NLMSG_ALIGN(payload);
  82 }
  83
  84 /*
  85  * following 2 function should be used in combination.
  86  * start_nest_attr returns nlattr structure, which should be completed by
  87  * end_nest_attr,
  88  * before these invocations any number of netlink arguments could be inserted
  89  * */
  90 static struct nlattr *start_nest_attr(struct genl *req, uint16_t type)
  91 {
  92         struct nlattr *start = (struct nlattr *)((char *)req +
  93                                                  NLMSG_ALIGN(req->n.nlmsg_len));
  94
  95         start->nla_type = NLA_F_NESTED | type;
  96         req->n.nlmsg_len += NLMSG_ALIGN(sizeof(struct nlattr));
  97         return start;
  98 }
  99
 100 static void end_nest_attr(struct genl *req, struct nlattr *start)
 101 {
 102         start->nla_len = (__u16)((char *)req +
 103                                  NLMSG_ALIGN(req->n.nlmsg_len) - (char *)start);
 104 }
 105
 106 static void add_string_attr(struct genl *req, const char *str, int type)
 107 {
 108         add_value_attr(req, str, strlen(str) + 1, type);
 109 }
 110
 111 static void add_uint64_attr(struct genl *req, const uint64_t v, int type)
 112 {
 113         add_value_attr(req, &v, sizeof(v), type);
 114 }
 115
 116 /* macros or templare, due uint64 and uint32 is the same functions */
 117 static void add_uint32_attr(struct genl *req, const uint32_t v, int type)
 118 {
 119         add_value_attr(req, &v, sizeof(v), type);
 120 }
 121
 122 static stc_error_e send_nfacct_request(int sock, struct genl *req)
 123 {
 124         struct sockaddr_nl nladdr = {.nl_family = AF_NETLINK};
 125         int ret = sendto(sock, (char *)(&req->n), req->n.nlmsg_len, 0,
 126                          (struct sockaddr *)&nladdr, sizeof(nladdr));
 127         ret_value_msg_if(ret < 0, STC_ERROR_FAIL,
 128                          "Failed to send nfacct request, error [%d]", ret);
 129
 130         return STC_ERROR_NONE;
 131 }
 132
 133 static stc_error_e nfacct_send_new(nfacct_rule_s *counter)
 134 {
 135         int ret = STC_ERROR_NONE;
 136         struct genl *req = MALLOC0(struct genl, 1);
 137         if (req == NULL) {
 138                 STC_LOGE("Failed allocate memory to genl request message");
 139                 return STC_ERROR_OUT_OF_MEMORY;
 140         }
 141
 142         prepare_netlink_msg(req, NFNL_MSG_ACCT_NEW, NLM_F_CREATE | NLM_F_ACK);
 143         add_string_attr(req, counter->name, NFACCT_NAME);
 144
 145         if (STC_DEBUG_LOG)
 146                 STC_LOGD("counter name %s", counter->name);
 147
 148         /* padding */
 149         add_uint64_attr(req, 0, NFACCT_PKTS);
 150         add_uint64_attr(req, 0, NFACCT_BYTES);
 151         if (counter->quota) {
 152                 STC_LOGD("quota bytes %"PRId64, counter->quota);
 153
 154                 add_uint32_attr(req, htobe32(NFACCT_F_QUOTA_BYTES),
 155                                 NFACCT_FLAGS);
 156                 add_uint64_attr(req, htobe64(counter->quota), NFACCT_QUOTA);
 157         }
 158
 159         ret = send_nfacct_request(counter->carg->sock, req);
 160         FREE(req);
 161         return ret;
 162 }
 163
 164 stc_error_e nfacct_send_del(nfacct_rule_s *counter)
 165 {
 166         int ret = STC_ERROR_NONE;
 167         struct genl *req = MALLOC0(struct genl, 1);
 168         if (req == NULL) {
 169                 STC_LOGE("Failed allocate memory to genl request message");
 170                 return STC_ERROR_OUT_OF_MEMORY;
 171         }
 172
 173         if (STC_DEBUG_LOG)
 174                 STC_LOGD("send remove request for %s", counter->name);
 175
 176         prepare_netlink_msg(req, NFNL_MSG_ACCT_DEL, NLM_F_ACK);
 177         add_string_attr(req, counter->name, NFACCT_NAME);
 178
 179         ret = send_nfacct_request(counter->carg->sock, req);
 180         FREE(req);
 181         return ret;
 182 }
 183 #define NFACCT_F_QUOTAS (NFACCT_F_QUOTA_BYTES | NFACCT_F_QUOTA_PKTS)
 184
 185 static stc_error_e internal_nfacct_send_get(struct counter_arg *carg,
 186                                             enum nfnl_acct_msg_types get_type,
 187                                             const char *name,
 188                                             int mask, int filter)
 189 {
 190         int ret = STC_ERROR_NONE;
 191         struct nlattr *na;
 192         int flag = !name ? NLM_F_DUMP : 0;
 193         struct genl *req = MALLOC0(struct genl, 1);
 194         if (req == NULL) {
 195                 STC_LOGE("Failed allocate memory to genl request message");
 196                 return STC_ERROR_OUT_OF_MEMORY;
 197         }
 198
 199         prepare_netlink_msg(req, get_type, flag);
 200         /* due we don't get counter with quota any where else,
 201          * here we will request just counters by default */
 202         if (name)
 203                 add_string_attr(req, name, NFACCT_NAME);
 204
 205         na = start_nest_attr(req, NFACCT_FILTER);
 206         add_uint32_attr(req, htonl(mask), NFACCT_FILTER_ATTR_MASK);
 207         add_uint32_attr(req, htonl(filter), NFACCT_FILTER_ATTR_VALUE);
 208         end_nest_attr(req, na);
 209
 210         ret = send_nfacct_request(carg->sock, req);
 211         FREE(req);
 212         return ret;
 213 }
 214
 215 stc_error_e nfacct_send_get_counters(struct counter_arg *carg, const char *name)
 216 {
 217         /* get and reset countes value */
 218         return internal_nfacct_send_get(carg, NFNL_MSG_ACCT_GET_CTRZERO, name,
 219                                         NFACCT_F_QUOTAS, 0);
 220 }
 221
 222 stc_error_e nfacct_send_get_quotas(struct counter_arg *carg, const char *name)
 223 {
 224         /* just get counters */
 225         return internal_nfacct_send_get(carg, NFNL_MSG_ACCT_GET, name,
 226                                         NFACCT_F_QUOTA_BYTES,
 227                                         NFACCT_F_QUOTA_BYTES);
 228 }
 229
 230 stc_error_e nfacct_send_get_all(struct counter_arg *carg)
 231 {
 232         /* get and reset everything, used when quiting */
 233         return internal_nfacct_send_get(carg, NFNL_MSG_ACCT_GET_CTRZERO, NULL,
 234                                         0, 0);
 235 }
 236
 237 stc_error_e nfacct_send_get(nfacct_rule_s *rule)
 238 {
 239         if (rule->intend == NFACCT_BLOCK || rule->intend == NFACCT_WARN)
 240                 return nfacct_send_get_quotas(rule->carg, rule->name);
 241         else if (rule->intend == NFACCT_COUNTER)
 242                 return nfacct_send_get_counters(rule->carg, rule->name);
 243
 244         return STC_ERROR_INVALID_PARAMETER;
 245 }
 246
 247 static nfacct_rule_direction convert_to_iotype(int type)
 248 {
 249         return (type < NFACCT_COUNTER_LAST_ELEM &&
 250                 type > NFACCT_COUNTER_UNKNOWN) ? type : NFACCT_COUNTER_UNKNOWN;
 251 }
 252
 253 static stc_iface_type_e convert_to_iftype(int type)
 254 {
 255         return (type < STC_IFACE_LAST_ELEM &&
 256                 type > STC_IFACE_UNKNOWN) ? type : STC_IFACE_UNKNOWN;
 257 }
 258
 259 bool recreate_counter_by_name(char *cnt_name, nfacct_rule_s *cnt)
 260 {
 261         char *iftype_part;
 262         char *classid_part;
 263         char *io_part;
 264         char *ifname_part;
 265         char *save_ptr = NULL;
 266         char name[NFACCT_NAME_MAX] = {0}; /* parse buffer to avoid cnt_name modification */
 267
 268         strncpy(name, cnt_name, sizeof(name) - 1);
 269
 270         switch (name[0]) {
 271         case 'c':
 272                 cnt->intend  = NFACCT_COUNTER;
 273                 break;
 274         case 'w':
 275                 cnt->intend  = NFACCT_WARN;
 276                 break;
 277         case 'r':
 278                 cnt->intend  = NFACCT_BLOCK;
 279                 break;
 280         case 't':
 281                 cnt->intend  = NFACCT_TETH_COUNTER;
 282                 break;
 283         default:
 284                 return false;
 285         }
 286
 287         STRING_SAVE_COPY(cnt->name, cnt_name);
 288
 289         if (cnt->intend == NFACCT_TETH_COUNTER) {
 290                 char ifname_buf[MAX_IFACE_LENGTH];
 291                 int ifname_len;
 292                 stc_iface_type_e iface;
 293                 /* tbnep+:seth_w0; means comes by bt go away by mobile interface,
 294                  * it's outgoing traffic, due all tethering is mobile databased */
 295                 iftype_part = strchr(name, ':');
 296                 ret_value_msg_if(iftype_part == NULL,
 297                                  false, "Invalid format of the tethering counter %s", name);
 298                 ifname_len = iftype_part - name - 1;
 299                 strncpy(ifname_buf, name + 1, ifname_len); /* skip first t */
 300                 ifname_buf[ifname_len] = '\0';
 301                 iface = get_iftype_by_name(ifname_buf);
 302                 /* check first part is it datacall */
 303                 if (iface == STC_IFACE_DATACALL) {
 304                         strncpy(cnt->ifname, ifname_buf, MAX_IFACE_LENGTH - 1);
 305                         cnt->iotype = NFACCT_COUNTER_IN;
 306                 } else {
 307                         /* +1, due : symbol and till the end of cnt_name */
 308                         strncpy(ifname_buf, iftype_part + 1, MAX_IFACE_LENGTH - 1);
 309                         iface = get_iftype_by_name(ifname_buf);
 310                         if (iface == STC_IFACE_DATACALL) {
 311                                 cnt->iotype = NFACCT_COUNTER_OUT;
 312                                 strncpy(cnt->ifname, ifname_buf, MAX_IFACE_LENGTH - 1);
 313                         }
 314                 }
 315
 316                 if (cnt->iotype == NFACCT_COUNTER_UNKNOWN) {
 317                         STC_LOGE("can't determine tethering direction %s", name);
 318                         return false;
 319                 }
 320                 cnt->iftype = STC_IFACE_DATACALL;
 321                 cnt->classid = STC_TETHERING_APP_CLASSID;
 322                 return true;
 323         }
 324
 325         io_part = strtok_r(name, "_", &save_ptr);
 326         if (io_part != NULL)
 327                 cnt->iotype = convert_to_iotype(atoi(io_part + 1));
 328         else
 329                 return false;
 330
 331         iftype_part = strtok_r(NULL, "_", &save_ptr);
 332         if (iftype_part != NULL)
 333                 cnt->iftype = convert_to_iftype(atoi(iftype_part));
 334         else
 335                 return false;
 336
 337         classid_part = strtok_r(NULL, "_", &save_ptr);
 338         if (classid_part != NULL)
 339                 cnt->classid = atoi(classid_part);
 340         else {
 341                 cnt->classid = STC_ALL_APP_CLASSID;
 342                 return cnt->intend == NFACCT_BLOCK ? true : false;
 343         }
 344
 345         ifname_part = strtok_r(NULL, "\0", &save_ptr);
 346         if (ifname_part != NULL)
 347                 STRING_SAVE_COPY(cnt->ifname, ifname_part);
 348         else
 349                 return false;
 350
 351         return true;
 352 }
 353
 354 static void _process_answer(struct netlink_serialization_params *params)
 355 {
 356         struct rtattr *na;
 357         struct rtattr *attr_list[__NFACCT_MAX] = {0};
 358         struct counter_arg *carg = params->carg;
 359         struct genl *ans = params->ans;;
 360         struct nlmsghdr *nlhdr = &ans->n;
 361         int len = GENLMSG_PAYLOAD(nlhdr);
 362         int ans_len = carg->ans_len;
 363
 364         if (len == 0)
 365                 return;
 366
 367         /* parse reply message */
 368         na = (struct rtattr *)GENLMSG_DATA(ans);
 369
 370         while (NLMSG_OK(nlhdr, ans_len)) {
 371                 fill_attribute_list(attr_list, NFACCT_MAX,
 372                                     na, len);
 373                 if (!attr_list[NFACCT_NAME] ||
 374                     !attr_list[NFACCT_BYTES])
 375                         goto next;
 376                 params->eval_attr(attr_list, carg);
 377
 378 next:
 379                 nlhdr = NLMSG_NEXT(nlhdr, ans_len);
 380                 if (ans_len < 0)
 381                         break;
 382                 na = (struct rtattr *)GENLMSG_DATA(nlhdr);
 383         }
 384
 385         if (params->post_eval_attr)
 386                 params->post_eval_attr(carg);
 387 }
 388
 389 netlink_serialization_command *
 390 netlink_create_command(struct netlink_serialization_params *params)
 391 {
 392         static netlink_serialization_command command = {0,};
 393         command.deserialize_answer = _process_answer;
 394         command.params = *params;
 395         return &command;
 396 }
 397
 398 static char *get_iptables_cmd(const nfacct_rule_action action)
 399 {
 400         if (action == NFACCT_ACTION_APPEND)
 401                 return APPEND;
 402         else if (action == NFACCT_ACTION_DELETE)
 403                 return DELETE;
 404         else if (action == NFACCT_ACTION_INSERT)
 405                 return INSERT;
 406
 407         return "";
 408 }
 409
 410 static char *get_iptables_chain(const nfacct_rule_direction iotype)
 411 {
 412         if (iotype == NFACCT_COUNTER_IN)
 413                 return STC_IN_CHAIN;
 414         else if (iotype == NFACCT_COUNTER_OUT)
 415                 return STC_OUT_CHAIN;
 416         else if (iotype == NFACCT_COUNTER_FORWARD)
 417                 return STC_FRWD_CHAIN;
 418
 419         return "";
 420 }
 421
 422 static char *get_iptables_jump(const nfacct_rule_jump jump)
 423 {
 424         if (jump == NFACCT_JUMP_ACCEPT)
 425                 return ACCEPT_RULE;
 426         else if (jump == NFACCT_JUMP_REJECT)
 427                 return REJECT_RULE;
 428
 429         return "";
 430 }
 431
 432 static char *choose_iftype_name(nfacct_rule_s *rule)
 433 {
 434         return strlen(rule->ifname) != 0 ? rule->ifname :
 435                 get_iftype_name(rule->iftype);
 436 }
 437
 438 static stc_error_e exec_iptables_cmd(nfacct_rule_s *rule)
 439 {
 440         stc_error_e ret = STC_ERROR_NONE;
 441         iptables_rule_s iptables_rule;
 442         memset(&iptables_rule, 0, sizeof(iptables_rule_s));
 443
 444         iptables_rule.nfacct_name = g_strdup(rule->name);
 445         iptables_rule.ifname = g_strdup(rule->ifname);
 446         iptables_rule.target = g_strdup(get_iptables_jump(rule->jump));
 447         iptables_rule.chain = g_strdup(get_iptables_chain(rule->iotype));
 448         iptables_rule.classid = rule->classid;
 449         iptables_rule.direction = (rule->iotype & NFACCT_COUNTER_IN) ? 0 : 1;
 450
 451         if (rule->action == NFACCT_ACTION_DELETE) {
 452                 /* delete interface rule */
 453                 ret = iptables_remove(&iptables_rule);
 454         } else {
 455                 /* add interface rule */
 456                 ret = iptables_add(&iptables_rule);
 457         }
 458
 459         g_free(iptables_rule.nfacct_name);
 460         g_free(iptables_rule.ifname);
 461         g_free(iptables_rule.target);
 462         g_free(iptables_rule.chain);
 463
 464         return ret;
 465 }
 466
 467 static stc_error_e produce_app_rule(nfacct_rule_s *rule)
 468 {
 469         if (rule == NULL)
 470                 return STC_ERROR_INVALID_PARAMETER;
 471
 472         char *set_cmd = get_iptables_cmd(rule->action);
 473         char *jump_cmd = get_iptables_jump(rule->jump);
 474         char nfacct_buf[sizeof(NFACCT_NAME_MOD) +
 475                 3*MAX_DEC_SIZE(int) + 4];
 476         stc_error_e ret = STC_ERROR_NONE;
 477
 478         /* income part */
 479         if (rule->iotype & NFACCT_COUNTER_IN) {
 480                 rule->quota = rule->rcv_limit;
 481                 rule->iotype = NFACCT_COUNTER_IN;
 482                 generate_counter_name(rule);
 483
 484                 /* to support quated counter we need nfacct,
 485                  *      don't use it in case of just block without a limit
 486                  *      iow, send_limit = 0 and rcv_limit 0 */
 487                 if (rule->action != NFACCT_ACTION_DELETE) {
 488                         ret = nfacct_send_del(rule);
 489                         ret_value_msg_if(ret != STC_ERROR_NONE, ret,
 490                                          "can't del quota counter");
 491
 492                         ret = nfacct_send_new(rule);
 493                         ret_value_msg_if(ret != STC_ERROR_NONE, ret,
 494                                          "can't set nfacct counter");
 495                         keep_counter(rule);
 496                 }
 497
 498                 /* we have a counter, let's key in a rule, drop in case of
 499                  *  send_limit/rcv_limit */
 500                 ret = snprintf(nfacct_buf, sizeof(nfacct_buf), NFACCT_NAME_MOD,
 501                                rule->name);
 502                 ret_value_msg_if(ret > sizeof(nfacct_buf) || ret < 0,
 503                                  STC_ERROR_FAIL, "Not enought buffer");
 504
 505                 ret = exec_iptables_cmd(rule);
 506                 ret_value_msg_if(ret != STC_ERROR_NONE, STC_ERROR_FAIL,
 507                                  "Can't set conditional block for ingress"
 508                                  " traffic, for classid %u, cmd %s, j %s",
 509                                  rule->classid, set_cmd, jump_cmd);
 510
 511                 /* remove in any case */
 512                 if (rule->action == NFACCT_ACTION_DELETE) {
 513                         /* TODO here and everywhere should be not just a del,
 514                          *      here should be get counted value and than
 515                          *      set new counter with that value, but it's minor issue,
 516                          *      due it's not clear when actual counters was stored,
 517                          *      and based on which value settings made such decition */
 518                         rule->iptables_rule = nfacct_send_del;
 519                         set_finalize_flag(rule);
 520                         nfacct_send_get(rule);
 521                         ret = nfacct_send_del(rule);
 522                         ret_value_msg_if(ret != STC_ERROR_NONE, ret,
 523                                          "can't del quota counter");
 524                 }
 525         }
 526
 527         if (rule->iotype & NFACCT_COUNTER_OUT) {
 528                 /* outcome part */
 529                 rule->iotype = NFACCT_COUNTER_OUT;
 530                 rule->quota = rule->send_limit;
 531                 generate_counter_name(rule);
 532                 if (rule->action != NFACCT_ACTION_DELETE) {
 533                         ret = nfacct_send_del(rule);
 534                         ret_value_msg_if(ret != STC_ERROR_NONE, ret,
 535                                          "can't del quota counter");
 536
 537                         ret = nfacct_send_new(rule);
 538                         ret_value_msg_if(ret != STC_ERROR_NONE, ret,
 539                                          "can't set quota counter");
 540                         keep_counter(rule);
 541                 }
 542
 543                 ret = snprintf(nfacct_buf, sizeof(nfacct_buf), NFACCT_NAME_MOD,
 544                                rule->name);
 545                 ret_value_msg_if(ret > sizeof(nfacct_buf) || ret < 0,
 546                                  STC_ERROR_FAIL, "Not enought buffer");
 547
 548                 ret = exec_iptables_cmd(rule);
 549                 ret_value_msg_if(ret != STC_ERROR_NONE, STC_ERROR_FAIL,
 550                                  "Can't set conditional block for engress"
 551                                  " traffic, for classid %u, cmd %s, j %s",
 552                                  rule->classid, set_cmd, jump_cmd);
 553
 554                 if (rule->action == NFACCT_ACTION_DELETE) {
 555                         rule->iptables_rule = nfacct_send_del;
 556                         /* not effective, it's better to replace
 557                          * set_finalize_flag by set_property,
 558                          * due keep_counter it necessary only for
 559                          * setting iptables_rule */
 560                         set_finalize_flag(rule);
 561                         nfacct_send_get(rule);
 562                         ret = nfacct_send_del(rule);
 563                         ret_value_msg_if(ret != STC_ERROR_NONE, ret,
 564                                          "can't del quota counter");
 565                 }
 566         }
 567         return STC_ERROR_NONE;
 568 }
 569
 570 static stc_error_e produce_iface_rule(nfacct_rule_s *rule)
 571 {
 572         if (rule == NULL)
 573                 return STC_ERROR_INVALID_PARAMETER;
 574
 575         char *set_cmd = get_iptables_cmd(rule->action);
 576         char *jump_cmd = get_iptables_jump(rule->jump);
 577         char nfacct_buf[sizeof(NFACCT_NAME_MOD) +
 578                 3*MAX_DEC_SIZE(int) + 4];
 579         stc_error_e ret;
 580
 581         rule->classid = 0;
 582
 583         if (rule->iotype & NFACCT_COUNTER_IN) {
 584                 /* income part */
 585                 rule->iotype = NFACCT_COUNTER_IN;
 586                 rule->quota = rule->rcv_limit;
 587                 generate_counter_name(rule);
 588
 589                 if (rule->action != NFACCT_ACTION_DELETE) {
 590                         /* send delete comman in case of creation,
 591                          * because nfacct doesn't reset value for nfacct quota
 592                          * in case of quota existing */
 593                         ret = nfacct_send_del(rule);
 594                         ret_value_msg_if(ret != STC_ERROR_NONE, ret,
 595                                          "can't del quota counter");
 596
 597                         ret = nfacct_send_new(rule);
 598                         ret_value_msg_if(ret != STC_ERROR_NONE, ret,
 599                                          "can't set quota counter");
 600                         keep_counter(rule);
 601                 }
 602
 603                 ret = snprintf(nfacct_buf, sizeof(nfacct_buf),
 604                                NFACCT_NAME_MOD, rule->name);
 605                 ret_value_msg_if(ret > sizeof(nfacct_buf) || ret < 0,
 606                                  STC_ERROR_FAIL, "Not enought buffer");
 607
 608                 ret = exec_iptables_cmd(rule);
 609                 ret_value_msg_if(ret != STC_ERROR_NONE, STC_ERROR_FAIL,
 610                                  "Can't set conditional block for ingress"
 611                                  " traffic, for iftype %d, cmd %s, j %s",
 612                                  rule->iftype, set_cmd, jump_cmd);
 613
 614                 /* for tethering */
 615                 if (rule->intend == NFACCT_WARN ||
 616                     rule->intend == NFACCT_BLOCK) {
 617                         /* RULE_IFACE_OUT is not a misprint here */
 618                         nfacct_rule_direction temp_iotype = rule->iotype;
 619
 620                         rule->iotype = NFACCT_COUNTER_FORWARD;
 621                         ret = exec_iptables_cmd(rule);
 622                         rule->iotype = temp_iotype;
 623                         ret_value_msg_if(ret != STC_ERROR_NONE, STC_ERROR_FAIL,
 624                                          "Can't set forward rule for ingress "
 625                                          "traffic, for iftype %d, cmd %s, j %s",
 626                                          rule->iftype, set_cmd, jump_cmd);
 627                 }
 628                 /* tethering */
 629
 630                 if (rule->action == NFACCT_ACTION_DELETE) {
 631                         rule->iptables_rule = nfacct_send_del;
 632                         set_finalize_flag(rule);
 633                         nfacct_send_get(rule);
 634                         ret = nfacct_send_del(rule);
 635                         ret_value_msg_if(ret != STC_ERROR_NONE, ret,
 636                                          "can't del quota counter");
 637                 }
 638         }
 639
 640         if (rule->iotype & NFACCT_COUNTER_OUT) {
 641                 /* outcome part */
 642                 rule->iotype = NFACCT_COUNTER_OUT;
 643                 rule->quota = rule->send_limit;
 644                 generate_counter_name(rule);
 645
 646                 if (rule->action != NFACCT_ACTION_DELETE) {
 647                         /* send delete comman in case of creation,
 648                          * because nfacct doesn't reset value for nfacct quota
 649                          * in case of quota existing */
 650                         ret = nfacct_send_del(rule);
 651                         ret_value_msg_if(ret != STC_ERROR_NONE, ret,
 652                                          "can't del quota counter");
 653
 654                         ret = nfacct_send_new(rule);
 655                         ret_value_msg_if(ret != STC_ERROR_NONE, ret,
 656                                          "can't set quota counter");
 657                         keep_counter(rule);
 658                 }
 659
 660                 ret = snprintf(nfacct_buf, sizeof(nfacct_buf),
 661                                NFACCT_NAME_MOD, rule->name);
 662                 ret_value_msg_if(ret > sizeof(nfacct_buf) || ret < 0,
 663                                  STC_ERROR_FAIL, "Not enough buffer");
 664
 665                 ret = exec_iptables_cmd(rule);
 666                 ret_value_msg_if(ret != STC_ERROR_NONE, STC_ERROR_FAIL,
 667                                  "Can't set conditional block for "
 668                                  "engress traffic, for iftype %d, cmd %s, j %s",
 669                                  rule->iftype, set_cmd, jump_cmd);
 670
 671                 /* for tethering  */
 672                 if (rule->intend == NFACCT_WARN ||
 673                     rule->intend == NFACCT_BLOCK) {
 674                         nfacct_rule_direction temp_iotype = rule->iotype;
 675
 676                         rule->iotype = NFACCT_COUNTER_OUT;
 677                         ret = exec_iptables_cmd(rule);
 678                         rule->iotype = temp_iotype;
 679                         ret_value_msg_if(ret != STC_ERROR_NONE, STC_ERROR_FAIL,
 680                                          "Can't set forward rule for engress "
 681                                          "traffic, for iftype %d, cmd %s, j %s",
 682                                          rule->iftype, set_cmd, jump_cmd);
 683                 }
 684                 /* tethering  */
 685
 686                 if (rule->action == NFACCT_ACTION_DELETE) {
 687                         rule->iptables_rule = nfacct_send_del;
 688                         set_finalize_flag(rule);
 689                         nfacct_send_get(rule);
 690                         ret = nfacct_send_del(rule);
 691                         ret_value_msg_if(ret != STC_ERROR_NONE, ret,
 692                                          "can't del quota counter");
 693                 }
 694         }
 695         return STC_ERROR_NONE;
 696 }
 697
 698 stc_error_e produce_net_rule(nfacct_rule_s *rule)
 699 {
 700         stc_error_e ret = STC_ERROR_NONE;
 701
 702         if (rule == NULL)
 703                 return STC_ERROR_INVALID_PARAMETER;
 704
 705         if (rule->action == NFACCT_ACTION_APPEND &&
 706             rule->intend == NFACCT_WARN &&
 707             !rule->send_limit && !rule->rcv_limit)
 708                 return STC_ERROR_NONE;
 709
 710         if (rule->classid != STC_ALL_APP_CLASSID &&
 711             rule->classid != STC_TETHERING_APP_CLASSID &&
 712             rule->classid != STC_TOTAL_DATACALL_CLASSID &&
 713             rule->classid != STC_TOTAL_WIFI_CLASSID &&
 714             rule->classid != STC_TOTAL_BLUETOOTH_CLASSID &&
 715             rule->classid != STC_TOTAL_IPV4_CLASSID &&
 716             rule->classid != STC_TOTAL_IPV6_CLASSID)
 717                 ret = produce_app_rule(rule);
 718         else
 719                 ret = produce_iface_rule(rule);
 720
 721         return ret;
 722 }
 723
 724 void generate_counter_name(nfacct_rule_s *counter)
 725 {
 726         char warn_symbol = 'c';
 727         if (!strlen(counter->ifname)) {
 728                 char *iftype_name = get_iftype_name(counter->iftype);
 729                 /* trace counter name, maybe name was already generated */
 730                 ret_msg_if(iftype_name == NULL,
 731                            "Can't get interface name for counter %s, iftype %d)!",
 732                            counter->name, counter->iftype);
 733                 STRING_SAVE_COPY(counter->ifname, iftype_name);
 734         }
 735
 736         if (counter->intend  == NFACCT_WARN)
 737                 warn_symbol = 'w';
 738         else if (counter->intend  == NFACCT_BLOCK)
 739                 warn_symbol = 'r';
 740         snprintf(counter->name, NFACCT_NAME_MAX, "%c%d_%d_%d_%s",
 741                  warn_symbol, counter->iotype, counter->iftype,
 742                  counter->classid, counter->ifname);
 743 }
 744