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"); //LCOV_EXCL_LINE
 139                 return STC_ERROR_OUT_OF_MEMORY; //LCOV_EXCL_LINE
 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); //LCOV_EXCL_LINE
 147
 148         /* padding */
 149         add_uint64_attr(req, 0, NFACCT_PKTS);
 150         add_uint64_attr(req, 0, NFACCT_BYTES);
 151         //LCOV_EXCL_START
 152         if (counter->quota) {
 153                 STC_LOGD("quota bytes %"PRId64, counter->quota);
 154
 155                 add_uint32_attr(req, htobe32(NFACCT_F_QUOTA_BYTES),
 156                                 NFACCT_FLAGS);
 157                 add_uint64_attr(req, htobe64(counter->quota), NFACCT_QUOTA);
 158         }
 159         //LCOV_EXCL_STOP
 160
 161         ret = send_nfacct_request(counter->carg->sock, req);
 162         FREE(req);
 163         return ret;
 164 }
 165
 166 stc_error_e nfacct_send_del(nfacct_rule_s *counter)
 167 {
 168         int ret = STC_ERROR_NONE;
 169         struct genl *req = MALLOC0(struct genl, 1);
 170         if (req == NULL) {
 171                 STC_LOGE("Failed allocate memory to genl request message"); //LCOV_EXCL_LINE
 172                 return STC_ERROR_OUT_OF_MEMORY; //LCOV_EXCL_LINE
 173         }
 174
 175         if (STC_DEBUG_LOG)
 176                 STC_LOGD("send remove request for %s", counter->name); //LCOV_EXCL_LINE
 177
 178         prepare_netlink_msg(req, NFNL_MSG_ACCT_DEL, NLM_F_ACK);
 179         add_string_attr(req, counter->name, NFACCT_NAME);
 180
 181         ret = send_nfacct_request(counter->carg->sock, req);
 182         FREE(req);
 183         return ret;
 184 }
 185 #define NFACCT_F_QUOTAS (NFACCT_F_QUOTA_BYTES | NFACCT_F_QUOTA_PKTS)
 186
 187 static stc_error_e internal_nfacct_send_get(struct counter_arg *carg,
 188                                             enum nfnl_acct_msg_types get_type,
 189                                             const char *name,
 190                                             int mask, int filter)
 191 {
 192         int ret = STC_ERROR_NONE;
 193         struct nlattr *na;
 194         int flag = !name ? NLM_F_DUMP : 0;
 195         struct genl *req = MALLOC0(struct genl, 1);
 196         if (req == NULL) {
 197                 STC_LOGE("Failed allocate memory to genl request message"); //LCOV_EXCL_LINE
 198                 return STC_ERROR_OUT_OF_MEMORY; //LCOV_EXCL_LINE
 199         }
 200
 201         prepare_netlink_msg(req, get_type, flag);
 202         /* due we don't get counter with quota any where else,
 203          * here we will request just counters by default */
 204         if (name)
 205                 add_string_attr(req, name, NFACCT_NAME);
 206
 207         na = start_nest_attr(req, NFACCT_FILTER);
 208         add_uint32_attr(req, htonl(mask), NFACCT_FILTER_ATTR_MASK);
 209         add_uint32_attr(req, htonl(filter), NFACCT_FILTER_ATTR_VALUE);
 210         end_nest_attr(req, na);
 211
 212         ret = send_nfacct_request(carg->sock, req);
 213         FREE(req);
 214         return ret;
 215 }
 216
 217 stc_error_e nfacct_send_get_counters(struct counter_arg *carg, const char *name)
 218 {
 219         /* get and reset countes value */
 220         return internal_nfacct_send_get(carg, NFNL_MSG_ACCT_GET_CTRZERO, name,
 221                                         NFACCT_F_QUOTAS, 0);
 222 }
 223
 224 stc_error_e nfacct_send_get_quotas(struct counter_arg *carg, const char *name)
 225 {
 226         /* just get counters */
 227         return internal_nfacct_send_get(carg, NFNL_MSG_ACCT_GET, name,
 228                                         NFACCT_F_QUOTA_BYTES,
 229                                         NFACCT_F_QUOTA_BYTES);
 230 }
 231
 232 stc_error_e nfacct_send_get_all(struct counter_arg *carg)
 233 {
 234         /* get and reset everything, used when quiting */
 235         return internal_nfacct_send_get(carg, NFNL_MSG_ACCT_GET_CTRZERO, NULL,
 236                                         0, 0);
 237 }
 238
 239 stc_error_e nfacct_send_get(nfacct_rule_s *rule)
 240 {
 241         if (rule->intend == NFACCT_BLOCK || rule->intend == NFACCT_WARN)
 242                 return nfacct_send_get_quotas(rule->carg, rule->name);
 243         else if (rule->intend == NFACCT_COUNTER)
 244                 return nfacct_send_get_counters(rule->carg, rule->name);
 245
 246         return STC_ERROR_INVALID_PARAMETER;
 247 }
 248
 249 static nfacct_rule_direction convert_to_iotype(int type)
 250 {
 251         return (type < NFACCT_COUNTER_LAST_ELEM &&
 252                 type > NFACCT_COUNTER_UNKNOWN) ? type : NFACCT_COUNTER_UNKNOWN;
 253 }
 254
 255 static stc_iface_type_e convert_to_iftype(int type)
 256 {
 257         return (type < STC_IFACE_LAST_ELEM &&
 258                 type > STC_IFACE_UNKNOWN) ? type : STC_IFACE_UNKNOWN;
 259 }
 260
 261 bool recreate_counter_by_name(char *cnt_name, nfacct_rule_s *cnt)
 262 {
 263         char *iftype_part;
 264         char *classid_part;
 265         char *io_part;
 266         char *ifname_part;
 267         char *save_ptr = NULL;
 268         char name[NFACCT_NAME_MAX] = {0}; /* parse buffer to avoid cnt_name modification */
 269
 270         strncpy(name, cnt_name, sizeof(name) - 1);
 271
 272         switch (name[0]) {
 273         case 'c':
 274                 cnt->intend  = NFACCT_COUNTER;
 275                 break;
 276         case 'w':
 277                 cnt->intend  = NFACCT_WARN;
 278                 break;
 279         case 'r':
 280                 cnt->intend  = NFACCT_BLOCK;
 281                 break;
 282         case 't':
 283                 cnt->intend  = NFACCT_TETH_COUNTER; //LCOV_EXCL_LINE
 284                 break; //LCOV_EXCL_LINE
 285         default:
 286                 return false;
 287         }
 288
 289         STRING_SAVE_COPY(cnt->name, cnt_name);
 290
 291         //LCOV_EXCL_START
 292         if (cnt->intend == NFACCT_TETH_COUNTER) {
 293                 char ifname_buf[MAX_IFACE_LENGTH];
 294                 int ifname_len;
 295                 stc_iface_type_e iface;
 296                 /* tbnep+:seth_w0; means comes by bt go away by mobile interface,
 297                  * it's outgoing traffic, due all tethering is mobile databased */
 298                 iftype_part = strchr(name, ':');
 299                 ret_value_msg_if(iftype_part == NULL,
 300                                  false, "Invalid format of the tethering counter %s", name);
 301                 ifname_len = iftype_part - name - 1;
 302                 strncpy(ifname_buf, name + 1, ifname_len); /* skip first t */
 303                 ifname_buf[ifname_len] = '\0';
 304                 iface = get_iftype_by_name(ifname_buf);
 305                 /* check first part is it datacall */
 306                 if (iface == STC_IFACE_DATACALL) {
 307                         strncpy(cnt->ifname, ifname_buf, MAX_IFACE_LENGTH - 1);
 308                         cnt->iotype = NFACCT_COUNTER_IN;
 309                 } else {
 310                         /* +1, due : symbol and till the end of cnt_name */
 311                         strncpy(ifname_buf, iftype_part + 1, MAX_IFACE_LENGTH - 1);
 312                         iface = get_iftype_by_name(ifname_buf);
 313                         if (iface == STC_IFACE_DATACALL) {
 314                                 cnt->iotype = NFACCT_COUNTER_OUT;
 315                                 strncpy(cnt->ifname, ifname_buf, MAX_IFACE_LENGTH - 1);
 316                         }
 317                 }
 318
 319                 if (cnt->iotype == NFACCT_COUNTER_UNKNOWN) {
 320                         STC_LOGE("can't determine tethering direction %s", name);
 321                         return false;
 322                 }
 323                 cnt->iftype = STC_IFACE_DATACALL;
 324                 cnt->classid = STC_TETHERING_APP_CLASSID;
 325                 return true;
 326         }
 327         //LCOV_EXCL_STOP
 328
 329         io_part = strtok_r(name, "_", &save_ptr);
 330         if (io_part != NULL)
 331                 cnt->iotype = convert_to_iotype(atoi(io_part + 1));
 332         else
 333                 return false;
 334
 335         iftype_part = strtok_r(NULL, "_", &save_ptr);
 336         if (iftype_part != NULL)
 337                 cnt->iftype = convert_to_iftype(atoi(iftype_part));
 338         else
 339                 return false;
 340
 341         classid_part = strtok_r(NULL, "_", &save_ptr);
 342         if (classid_part != NULL)
 343                 cnt->classid = atoi(classid_part);
 344         else {
 345                 cnt->classid = STC_ALL_APP_CLASSID;
 346                 return cnt->intend == NFACCT_BLOCK ? true : false;
 347         }
 348
 349         ifname_part = strtok_r(NULL, "\0", &save_ptr);
 350         if (ifname_part != NULL)
 351                 STRING_SAVE_COPY(cnt->ifname, ifname_part);
 352         else
 353                 return false;
 354
 355         return true;
 356 }
 357
 358 static void _process_answer(struct netlink_serialization_params *params)
 359 {
 360         struct rtattr *na;
 361         struct rtattr *attr_list[__NFACCT_MAX] = {0};
 362         struct counter_arg *carg = params->carg;
 363         struct genl *ans = params->ans;;
 364         struct nlmsghdr *nlhdr = &ans->n;
 365         int len = GENLMSG_PAYLOAD(nlhdr);
 366         int ans_len = carg->ans_len;
 367
 368         if (len == 0)
 369                 return;
 370
 371         /* parse reply message */
 372         na = (struct rtattr *)GENLMSG_DATA(ans);
 373
 374         while (NLMSG_OK(nlhdr, ans_len)) {
 375                 fill_attribute_list(attr_list, NFACCT_MAX,
 376                                     na, len);
 377                 if (!attr_list[NFACCT_NAME] ||
 378                     !attr_list[NFACCT_BYTES])
 379                         goto next;
 380                 params->eval_attr(attr_list, carg);
 381
 382 next:
 383                 nlhdr = NLMSG_NEXT(nlhdr, ans_len);
 384                 if (ans_len < 0)
 385                         break;
 386                 na = (struct rtattr *)GENLMSG_DATA(nlhdr);
 387         }
 388
 389         if (params->post_eval_attr)
 390                 params->post_eval_attr(carg);
 391 }
 392
 393 netlink_serialization_command *
 394 netlink_create_command(struct netlink_serialization_params *params)
 395 {
 396         static netlink_serialization_command command = {0,};
 397         command.deserialize_answer = _process_answer;
 398         command.params = *params;
 399         return &command;
 400 }
 401
 402 static char *get_iptables_cmd(const nfacct_rule_action action)
 403 {
 404         if (action == NFACCT_ACTION_APPEND)
 405                 return APPEND;
 406         else if (action == NFACCT_ACTION_DELETE)
 407                 return DELETE;
 408         else if (action == NFACCT_ACTION_INSERT)
 409                 return INSERT;
 410
 411         return "";
 412 }
 413
 414 static char *get_iptables_chain(const nfacct_rule_direction iotype)
 415 {
 416         if (iotype == NFACCT_COUNTER_IN)
 417                 return STC_IN_CHAIN;
 418         else if (iotype == NFACCT_COUNTER_OUT)
 419                 return STC_OUT_CHAIN;
 420         else if (iotype == NFACCT_COUNTER_FORWARD) //LCOV_EXCL_LINE
 421                 return STC_FRWD_CHAIN; //LCOV_EXCL_LINE
 422
 423         return "";
 424 }
 425
 426 static char *get_iptables_jump(const nfacct_rule_jump jump)
 427 {
 428         if (jump == NFACCT_JUMP_ACCEPT)
 429                 return ACCEPT_RULE;
 430         else if (jump == NFACCT_JUMP_REJECT)
 431                 return REJECT_RULE;
 432
 433         return "";
 434 }
 435
 436 /*
 437 static char *choose_iftype_name(nfacct_rule_s *rule)
 438 {
 439         return strlen(rule->ifname) != 0 ? rule->ifname :
 440                 get_iftype_name(rule->iftype);
 441 }
 442 */
 443
 444 static stc_error_e exec_iptables_cmd(nfacct_rule_s *rule)
 445 {
 446         stc_error_e ret = STC_ERROR_NONE;
 447         iptables_ip_type_e iptype;
 448         iptables_rule_s iptables_rule;
 449         memset(&iptables_rule, 0, sizeof(iptables_rule_s));
 450
 451         iptables_rule.nfacct_name = g_strdup(rule->name);
 452         iptables_rule.ifname = g_strdup(rule->ifname);
 453         iptables_rule.target = g_strdup(get_iptables_jump(rule->jump));
 454         iptables_rule.chain = g_strdup(get_iptables_chain(rule->iotype));
 455         iptables_rule.classid = rule->classid;
 456         iptables_rule.direction = (rule->iotype & NFACCT_COUNTER_IN) ? 0 : 1;
 457         iptype = (iptables_ip_type_e)rule->iptype;
 458
 459         if (rule->action == NFACCT_ACTION_DELETE) {
 460                 /* delete interface rule */
 461                 ret = iptables_remove(&iptables_rule, iptype);
 462         } else {
 463                 /* add interface rule */
 464                 ret = iptables_add(&iptables_rule, iptype);
 465         }
 466
 467         g_free(iptables_rule.nfacct_name);
 468         g_free(iptables_rule.ifname);
 469         g_free(iptables_rule.target);
 470         g_free(iptables_rule.chain);
 471
 472         return ret;
 473 }
 474
 475 static stc_error_e produce_app_rule(nfacct_rule_s *rule)
 476 {
 477         if (rule == NULL)
 478                 return STC_ERROR_INVALID_PARAMETER;
 479
 480         char *set_cmd = get_iptables_cmd(rule->action);
 481         char *jump_cmd = get_iptables_jump(rule->jump);
 482         char nfacct_buf[sizeof(NFACCT_NAME_MOD) +
 483                 3*MAX_DEC_SIZE(int) + 4];
 484         stc_error_e ret = STC_ERROR_NONE;
 485
 486         /* income part */
 487         if (rule->iotype & NFACCT_COUNTER_IN) {
 488                 rule->quota = rule->rcv_limit;
 489                 rule->iotype = NFACCT_COUNTER_IN;
 490                 generate_counter_name(rule);
 491
 492                 /* to support quated counter we need nfacct,
 493                  *      don't use it in case of just block without a limit
 494                  *      iow, send_limit = 0 and rcv_limit 0 */
 495                 if (rule->action != NFACCT_ACTION_DELETE) {
 496                         ret = nfacct_send_del(rule);
 497                         ret_value_msg_if(ret != STC_ERROR_NONE, ret,
 498                                          "can't del quota counter");
 499
 500                         ret = nfacct_send_new(rule);
 501                         ret_value_msg_if(ret != STC_ERROR_NONE, ret,
 502                                          "can't set nfacct counter");
 503                         keep_counter(rule);
 504                 }
 505
 506                 /* we have a counter, let's key in a rule, drop in case of
 507                  *  send_limit/rcv_limit */
 508                 ret = snprintf(nfacct_buf, sizeof(nfacct_buf), NFACCT_NAME_MOD,
 509                                rule->name);
 510                 ret_value_msg_if(ret > sizeof(nfacct_buf) || ret < 0,
 511                                  STC_ERROR_FAIL, "Not enought buffer");
 512
 513                 ret = exec_iptables_cmd(rule);
 514                 ret_value_msg_if(ret != STC_ERROR_NONE, STC_ERROR_FAIL,
 515                                  "Can't set conditional block for ingress"
 516                                  " traffic, for classid %u, cmd %s, j %s",
 517                                  rule->classid, set_cmd, jump_cmd);
 518
 519                 /* remove in any case */
 520                 if (rule->action == NFACCT_ACTION_DELETE) {
 521                         /* TODO here and everywhere should be not just a del,
 522                          *      here should be get counted value and than
 523                          *      set new counter with that value, but it's minor issue,
 524                          *      due it's not clear when actual counters was stored,
 525                          *      and based on which value settings made such decition */
 526                         rule->iptables_rule = nfacct_send_del;
 527                         set_finalize_flag(rule);
 528                         nfacct_send_get(rule);
 529                         ret = nfacct_send_del(rule);
 530                         ret_value_msg_if(ret != STC_ERROR_NONE, ret,
 531                                          "can't del quota counter");
 532                 }
 533         }
 534
 535         if (rule->iotype & NFACCT_COUNTER_OUT) {
 536                 /* outcome part */
 537                 rule->iotype = NFACCT_COUNTER_OUT;
 538                 rule->quota = rule->send_limit;
 539                 generate_counter_name(rule);
 540                 if (rule->action != NFACCT_ACTION_DELETE) {
 541                         ret = nfacct_send_del(rule);
 542                         ret_value_msg_if(ret != STC_ERROR_NONE, ret,
 543                                          "can't del quota counter");
 544
 545                         ret = nfacct_send_new(rule);
 546                         ret_value_msg_if(ret != STC_ERROR_NONE, ret,
 547                                          "can't set quota counter");
 548                         keep_counter(rule);
 549                 }
 550
 551                 ret = snprintf(nfacct_buf, sizeof(nfacct_buf), NFACCT_NAME_MOD,
 552                                rule->name);
 553                 ret_value_msg_if(ret > sizeof(nfacct_buf) || ret < 0,
 554                                  STC_ERROR_FAIL, "Not enought buffer");
 555
 556                 ret = exec_iptables_cmd(rule);
 557                 ret_value_msg_if(ret != STC_ERROR_NONE, STC_ERROR_FAIL,
 558                                  "Can't set conditional block for engress"
 559                                  " traffic, for classid %u, cmd %s, j %s",
 560                                  rule->classid, set_cmd, jump_cmd);
 561
 562                 if (rule->action == NFACCT_ACTION_DELETE) {
 563                         rule->iptables_rule = nfacct_send_del;
 564                         /* not effective, it's better to replace
 565                          * set_finalize_flag by set_property,
 566                          * due keep_counter it necessary only for
 567                          * setting iptables_rule */
 568                         set_finalize_flag(rule);
 569                         nfacct_send_get(rule);
 570                         ret = nfacct_send_del(rule);
 571                         ret_value_msg_if(ret != STC_ERROR_NONE, ret,
 572                                          "can't del quota counter");
 573                 }
 574         }
 575         return STC_ERROR_NONE;
 576 }
 577
 578 static stc_error_e produce_iface_rule(nfacct_rule_s *rule)
 579 {
 580         if (rule == NULL)
 581                 return STC_ERROR_INVALID_PARAMETER;
 582
 583         char *set_cmd = get_iptables_cmd(rule->action);
 584         char *jump_cmd = get_iptables_jump(rule->jump);
 585         char nfacct_buf[sizeof(NFACCT_NAME_MOD) +
 586                 3*MAX_DEC_SIZE(int) + 4];
 587         uint32_t classid = rule->classid;
 588         stc_error_e ret;
 589
 590         if (rule->iotype & NFACCT_COUNTER_IN) {
 591                 /* income part */
 592                 rule->iotype = NFACCT_COUNTER_IN;
 593                 rule->quota = rule->rcv_limit;
 594                 generate_counter_name(rule);
 595
 596                 if (rule->action != NFACCT_ACTION_DELETE) {
 597                         /* send delete comman in case of creation,
 598                          * because nfacct doesn't reset value for nfacct quota
 599                          * in case of quota existing */
 600                         ret = nfacct_send_del(rule);
 601                         ret_value_msg_if(ret != STC_ERROR_NONE, ret,
 602                                          "can't del quota counter");
 603
 604                         ret = nfacct_send_new(rule);
 605                         ret_value_msg_if(ret != STC_ERROR_NONE, ret,
 606                                          "can't set quota counter");
 607                         keep_counter(rule);
 608                 }
 609
 610                 ret = snprintf(nfacct_buf, sizeof(nfacct_buf),
 611                                NFACCT_NAME_MOD, rule->name);
 612                 ret_value_msg_if(ret > sizeof(nfacct_buf) || ret < 0,
 613                                  STC_ERROR_FAIL, "Not enought buffer");
 614
 615                 classid = rule->classid;
 616                 rule->classid = 0;
 617
 618                 ret = exec_iptables_cmd(rule);
 619                 ret_value_msg_if(ret != STC_ERROR_NONE, STC_ERROR_FAIL,
 620                                  "Can't set conditional block for ingress"
 621                                  " traffic, for iftype %d, cmd %s, j %s",
 622                                  rule->iftype, set_cmd, jump_cmd);
 623
 624                 //LCOV_EXCL_START
 625                 /* for tethering */
 626                 if (rule->intend == NFACCT_WARN ||
 627                     rule->intend == NFACCT_BLOCK) {
 628                         /* RULE_IFACE_OUT is not a misprint here */
 629                         nfacct_rule_direction temp_iotype = rule->iotype;
 630
 631                         rule->iotype = NFACCT_COUNTER_FORWARD;
 632                         ret = exec_iptables_cmd(rule);
 633                         rule->iotype = temp_iotype;
 634                         ret_value_msg_if(ret != STC_ERROR_NONE, STC_ERROR_FAIL,
 635                                          "Can't set forward rule for ingress "
 636                                          "traffic, for iftype %d, cmd %s, j %s",
 637                                          rule->iftype, set_cmd, jump_cmd);
 638                 }
 639                 /* tethering */
 640
 641                 if (rule->action == NFACCT_ACTION_DELETE) {
 642                         rule->iptables_rule = nfacct_send_del;
 643                         set_finalize_flag(rule);
 644                         nfacct_send_get(rule);
 645                         ret = nfacct_send_del(rule);
 646                         ret_value_msg_if(ret != STC_ERROR_NONE, ret,
 647                                          "can't del quota counter");
 648                 }
 649                 //LCOV_EXCL_STOP
 650         }
 651
 652         rule->classid = classid;
 653
 654         if (rule->iotype & NFACCT_COUNTER_OUT) {
 655                 /* outcome part */
 656                 rule->iotype = NFACCT_COUNTER_OUT;
 657                 rule->quota = rule->send_limit;
 658                 generate_counter_name(rule);
 659
 660                 if (rule->action != NFACCT_ACTION_DELETE) {
 661                         /* send delete comman in case of creation,
 662                          * because nfacct doesn't reset value for nfacct quota
 663                          * in case of quota existing */
 664                         ret = nfacct_send_del(rule);
 665                         ret_value_msg_if(ret != STC_ERROR_NONE, ret,
 666                                          "can't del quota counter");
 667
 668                         ret = nfacct_send_new(rule);
 669                         ret_value_msg_if(ret != STC_ERROR_NONE, ret,
 670                                          "can't set quota counter");
 671                         keep_counter(rule);
 672                 }
 673
 674                 ret = snprintf(nfacct_buf, sizeof(nfacct_buf),
 675                                NFACCT_NAME_MOD, rule->name);
 676                 ret_value_msg_if(ret > sizeof(nfacct_buf) || ret < 0,
 677                                  STC_ERROR_FAIL, "Not enough buffer");
 678
 679                 classid = rule->classid;
 680                 rule->classid = 0;
 681
 682                 ret = exec_iptables_cmd(rule);
 683                 ret_value_msg_if(ret != STC_ERROR_NONE, STC_ERROR_FAIL,
 684                                  "Can't set conditional block for "
 685                                  "engress traffic, for iftype %d, cmd %s, j %s",
 686                                  rule->iftype, set_cmd, jump_cmd);
 687
 688                 //LCOV_EXCL_START
 689                 /* for tethering  */
 690                 if (rule->intend == NFACCT_WARN ||
 691                     rule->intend == NFACCT_BLOCK) {
 692                         nfacct_rule_direction temp_iotype = rule->iotype;
 693
 694                         rule->iotype = NFACCT_COUNTER_OUT;
 695                         ret = exec_iptables_cmd(rule);
 696                         rule->iotype = temp_iotype;
 697                         ret_value_msg_if(ret != STC_ERROR_NONE, STC_ERROR_FAIL,
 698                                          "Can't set forward rule for engress "
 699                                          "traffic, for iftype %d, cmd %s, j %s",
 700                                          rule->iftype, set_cmd, jump_cmd);
 701                 }
 702                 /* tethering  */
 703
 704                 if (rule->action == NFACCT_ACTION_DELETE) {
 705                         rule->iptables_rule = nfacct_send_del;
 706                         set_finalize_flag(rule);
 707                         nfacct_send_get(rule);
 708                         ret = nfacct_send_del(rule);
 709                         ret_value_msg_if(ret != STC_ERROR_NONE, ret,
 710                                          "can't del quota counter");
 711                 }
 712                 //LCOV_EXCL_STOP
 713         }
 714         return STC_ERROR_NONE;
 715 }
 716
 717 stc_error_e produce_net_rule(nfacct_rule_s *rule)
 718 {
 719         stc_error_e ret = STC_ERROR_NONE;
 720
 721         if (rule == NULL)
 722                 return STC_ERROR_INVALID_PARAMETER;
 723
 724         if (rule->action == NFACCT_ACTION_APPEND &&
 725             rule->intend == NFACCT_WARN &&
 726             !rule->send_limit && !rule->rcv_limit)
 727                 return STC_ERROR_NONE;
 728
 729         if (rule->classid != STC_ALL_APP_CLASSID &&
 730             rule->classid != STC_TETHERING_APP_CLASSID &&
 731             rule->classid != STC_TOTAL_DATACALL_CLASSID &&
 732             rule->classid != STC_TOTAL_WIFI_CLASSID &&
 733             rule->classid != STC_TOTAL_BLUETOOTH_CLASSID &&
 734             rule->classid != STC_TOTAL_IPV4_CLASSID &&
 735             rule->classid != STC_TOTAL_IPV6_CLASSID)
 736                 ret = produce_app_rule(rule);
 737         else
 738                 ret = produce_iface_rule(rule);
 739
 740         return ret;
 741 }
 742
 743 void generate_counter_name(nfacct_rule_s *counter)
 744 {
 745         char warn_symbol = 'c';
 746         if (!strlen(counter->ifname)) {
 747                 char *iftype_name = get_iftype_name(counter->iftype);
 748                 /* trace counter name, maybe name was already generated */
 749                 ret_msg_if(iftype_name == NULL,
 750                            "Can't get interface name for counter %s, iftype %d)!",
 751                            counter->name, counter->iftype);
 752                 STRING_SAVE_COPY(counter->ifname, iftype_name);
 753         }
 754
 755         if (counter->intend  == NFACCT_WARN)
 756                 warn_symbol = 'w';
 757         else if (counter->intend  == NFACCT_BLOCK)
 758                 warn_symbol = 'r';
 759         snprintf(counter->name, NFACCT_NAME_MAX, "%c%d_%d_%d_%s",
 760                  warn_symbol, counter->iotype, counter->iftype,
 761                  counter->classid, counter->ifname);
 762 }
 763