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 'a':
 283                 cnt->intend  = NFACCT_ALLOW;
 284                 break;
 285         case 't':
 286                 cnt->intend  = NFACCT_TETH_COUNTER; //LCOV_EXCL_LINE
 287                 break; //LCOV_EXCL_LINE
 288         default:
 289                 return false;
 290         }
 291
 292         STRING_SAVE_COPY(cnt->name, cnt_name);
 293
 294         //LCOV_EXCL_START
 295         if (cnt->intend == NFACCT_TETH_COUNTER) {
 296                 char ifname_buf[MAX_IFACE_LENGTH];
 297                 int ifname_len;
 298                 stc_iface_type_e iface;
 299                 /* tbnep+:seth_w0; means comes by bt go away by mobile interface,
 300                  * it's outgoing traffic, due all tethering is mobile databased */
 301                 iftype_part = strchr(name, ':');
 302                 ret_value_msg_if(iftype_part == NULL,
 303                                  false, "Invalid format of the tethering counter %s", name);
 304                 ifname_len = iftype_part - name - 1;
 305                 strncpy(ifname_buf, name + 1, ifname_len); /* skip first t */
 306                 ifname_buf[ifname_len] = '\0';
 307                 iface = get_iftype_by_name(ifname_buf);
 308                 /* check first part is it datacall */
 309                 if (iface == STC_IFACE_DATACALL) {
 310                         strncpy(cnt->ifname, ifname_buf, MAX_IFACE_LENGTH - 1);
 311                         cnt->iotype = NFACCT_COUNTER_IN;
 312                 } else {
 313                         /* +1, due : symbol and till the end of cnt_name */
 314                         strncpy(ifname_buf, iftype_part + 1, MAX_IFACE_LENGTH - 1);
 315                         iface = get_iftype_by_name(ifname_buf);
 316                         if (iface == STC_IFACE_DATACALL) {
 317                                 cnt->iotype = NFACCT_COUNTER_OUT;
 318                                 strncpy(cnt->ifname, ifname_buf, MAX_IFACE_LENGTH - 1);
 319                         }
 320                 }
 321
 322                 if (cnt->iotype == NFACCT_COUNTER_UNKNOWN) {
 323                         STC_LOGE("can't determine tethering direction %s", name);
 324                         return false;
 325                 }
 326                 cnt->iftype = STC_IFACE_DATACALL;
 327                 cnt->classid = STC_TETHERING_APP_CLASSID;
 328                 return true;
 329         }
 330         //LCOV_EXCL_STOP
 331
 332         io_part = strtok_r(name, "_", &save_ptr);
 333         if (io_part != NULL)
 334                 cnt->iotype = convert_to_iotype(atoi(io_part + 1));
 335         else
 336                 return false;
 337
 338         iftype_part = strtok_r(NULL, "_", &save_ptr);
 339         if (iftype_part != NULL)
 340                 cnt->iftype = convert_to_iftype(atoi(iftype_part));
 341         else
 342                 return false;
 343
 344         classid_part = strtok_r(NULL, "_", &save_ptr);
 345         if (classid_part != NULL)
 346                 cnt->classid = atoi(classid_part);
 347         else {
 348                 cnt->classid = STC_ALL_APP_CLASSID;
 349                 return cnt->intend == NFACCT_BLOCK ? true : false;
 350         }
 351
 352         ifname_part = strtok_r(NULL, "\0", &save_ptr);
 353         if (ifname_part != NULL)
 354                 STRING_SAVE_COPY(cnt->ifname, ifname_part);
 355         else
 356                 return false;
 357
 358         return true;
 359 }
 360
 361 static void _process_answer(struct netlink_serialization_params *params)
 362 {
 363         struct rtattr *na;
 364         struct rtattr *attr_list[__NFACCT_MAX] = {0};
 365         struct counter_arg *carg = params->carg;
 366         struct genl *ans = params->ans;;
 367         struct nlmsghdr *nlhdr = &ans->n;
 368         int len = GENLMSG_PAYLOAD(nlhdr);
 369         int ans_len = carg->ans_len;
 370
 371         if (len == 0)
 372                 return;
 373
 374         /* parse reply message */
 375         na = (struct rtattr *)GENLMSG_DATA(ans);
 376
 377         while (NLMSG_OK(nlhdr, ans_len)) {
 378                 fill_attribute_list(attr_list, NFACCT_MAX,
 379                                     na, len);
 380                 if (!attr_list[NFACCT_NAME] ||
 381                     !attr_list[NFACCT_BYTES])
 382                         goto next;
 383                 params->eval_attr(attr_list, carg);
 384
 385 next:
 386                 nlhdr = NLMSG_NEXT(nlhdr, ans_len);
 387                 if (ans_len < 0)
 388                         break;
 389                 na = (struct rtattr *)GENLMSG_DATA(nlhdr);
 390         }
 391
 392         if (params->post_eval_attr)
 393                 params->post_eval_attr(carg);
 394 }
 395
 396 netlink_serialization_command *
 397 netlink_create_command(struct netlink_serialization_params *params)
 398 {
 399         static netlink_serialization_command command = {0,};
 400         command.deserialize_answer = _process_answer;
 401         command.params = *params;
 402         return &command;
 403 }
 404
 405 static char *get_iptables_cmd(const nfacct_rule_action action)
 406 {
 407         if (action == NFACCT_ACTION_APPEND)
 408                 return APPEND;
 409         else if (action == NFACCT_ACTION_DELETE)
 410                 return DELETE;
 411         else if (action == NFACCT_ACTION_INSERT)
 412                 return INSERT;
 413
 414         return "";
 415 }
 416
 417 static char *get_iptables_chain(const nfacct_rule_direction iotype)
 418 {
 419         if (iotype == NFACCT_COUNTER_IN)
 420                 return STC_IN_CHAIN;
 421         else if (iotype == NFACCT_COUNTER_OUT)
 422                 return STC_OUT_CHAIN;
 423         else if (iotype == NFACCT_COUNTER_FORWARD) //LCOV_EXCL_LINE
 424                 return STC_FRWD_CHAIN; //LCOV_EXCL_LINE
 425
 426         return "";
 427 }
 428
 429 static char *get_iptables_jump(const nfacct_rule_jump jump)
 430 {
 431         if (jump == NFACCT_JUMP_ACCEPT)
 432                 return ACCEPT_RULE;
 433         else if (jump == NFACCT_JUMP_REJECT)
 434                 return REJECT_RULE;
 435
 436         return "";
 437 }
 438
 439 /*
 440 static char *choose_iftype_name(nfacct_rule_s *rule)
 441 {
 442         return strlen(rule->ifname) != 0 ? rule->ifname :
 443                 get_iftype_name(rule->iftype);
 444 }
 445 */
 446
 447 static stc_error_e exec_iptables_cmd(nfacct_rule_s *rule)
 448 {
 449         stc_error_e ret = STC_ERROR_NONE;
 450         iptables_ip_type_e iptype;
 451         iptables_rule_s iptables_rule;
 452         memset(&iptables_rule, 0, sizeof(iptables_rule_s));
 453
 454         iptables_rule.nfacct_name = g_strdup(rule->name);
 455         iptables_rule.ifname = g_strdup(rule->ifname);
 456         iptables_rule.target = g_strdup(get_iptables_jump(rule->jump));
 457         iptables_rule.chain = g_strdup(get_iptables_chain(rule->iotype));
 458         iptables_rule.classid = rule->classid;
 459         iptables_rule.direction = (rule->iotype & NFACCT_COUNTER_IN) ?
 460                                         IPTABLES_DIRECTION_IN : IPTABLES_DIRECTION_OUT;
 461         iptype = (iptables_ip_type_e)rule->iptype;
 462
 463         if (rule->action == NFACCT_ACTION_DELETE) {
 464                 /* delete interface rule */
 465                 ret = iptables_remove(&iptables_rule, iptype);
 466         } else {
 467                 /* add interface rule */
 468                 ret = iptables_add(&iptables_rule, iptype);
 469         }
 470
 471         g_free(iptables_rule.nfacct_name);
 472         g_free(iptables_rule.ifname);
 473         g_free(iptables_rule.target);
 474         g_free(iptables_rule.chain);
 475
 476         return ret;
 477 }
 478
 479 static stc_error_e produce_app_rule(nfacct_rule_s *rule)
 480 {
 481         if (rule == NULL)
 482                 return STC_ERROR_INVALID_PARAMETER;
 483
 484         char *set_cmd = get_iptables_cmd(rule->action);
 485         char *jump_cmd = get_iptables_jump(rule->jump);
 486         char nfacct_buf[sizeof(NFACCT_NAME_MOD) +
 487                 3*MAX_DEC_SIZE(int) + 4];
 488         stc_error_e ret = STC_ERROR_NONE;
 489
 490         /* income part */
 491         if (rule->iotype & NFACCT_COUNTER_IN) {
 492                 rule->quota = rule->rcv_limit;
 493                 rule->iotype = NFACCT_COUNTER_IN;
 494                 generate_counter_name(rule);
 495
 496                 /* to support quated counter we need nfacct,
 497                  *      don't use it in case of just block without a limit
 498                  *      iow, send_limit = 0 and rcv_limit 0 */
 499                 if (rule->action != NFACCT_ACTION_DELETE) {
 500                         ret = nfacct_send_del(rule);
 501                         ret_value_msg_if(ret != STC_ERROR_NONE, ret,
 502                                          "can't del quota counter");
 503
 504                         ret = nfacct_send_new(rule);
 505                         ret_value_msg_if(ret != STC_ERROR_NONE, ret,
 506                                          "can't set nfacct counter");
 507                         keep_counter(rule);
 508                 }
 509
 510                 /* we have a counter, let's key in a rule, drop in case of
 511                  *  send_limit/rcv_limit */
 512                 ret = snprintf(nfacct_buf, sizeof(nfacct_buf), NFACCT_NAME_MOD,
 513                                rule->name);
 514                 ret_value_msg_if(ret > sizeof(nfacct_buf) || ret < 0,
 515                                  STC_ERROR_FAIL, "Not enought buffer");
 516
 517                 ret = exec_iptables_cmd(rule);
 518                 ret_value_msg_if(ret != STC_ERROR_NONE, STC_ERROR_FAIL,
 519                                  "Can't set conditional block for ingress"
 520                                  " traffic, for classid %u, cmd %s, j %s",
 521                                  rule->classid, set_cmd, jump_cmd);
 522
 523                 /* remove in any case */
 524                 if (rule->action == NFACCT_ACTION_DELETE) {
 525                         /* TODO here and everywhere should be not just a del,
 526                          *      here should be get counted value and than
 527                          *      set new counter with that value, but it's minor issue,
 528                          *      due it's not clear when actual counters was stored,
 529                          *      and based on which value settings made such decition */
 530                         rule->iptables_rule = nfacct_send_del;
 531                         set_finalize_flag(rule);
 532                         nfacct_send_get(rule);
 533                         ret = nfacct_send_del(rule);
 534                         ret_value_msg_if(ret != STC_ERROR_NONE, ret,
 535                                          "can't del quota counter");
 536                 }
 537         }
 538
 539         if (rule->iotype & NFACCT_COUNTER_OUT) {
 540                 /* outcome part */
 541                 rule->iotype = NFACCT_COUNTER_OUT;
 542                 rule->quota = rule->send_limit;
 543                 generate_counter_name(rule);
 544                 if (rule->action != NFACCT_ACTION_DELETE) {
 545                         ret = nfacct_send_del(rule);
 546                         ret_value_msg_if(ret != STC_ERROR_NONE, ret,
 547                                          "can't del quota counter");
 548
 549                         ret = nfacct_send_new(rule);
 550                         ret_value_msg_if(ret != STC_ERROR_NONE, ret,
 551                                          "can't set quota counter");
 552                         keep_counter(rule);
 553                 }
 554
 555                 ret = snprintf(nfacct_buf, sizeof(nfacct_buf), NFACCT_NAME_MOD,
 556                                rule->name);
 557                 ret_value_msg_if(ret > sizeof(nfacct_buf) || ret < 0,
 558                                  STC_ERROR_FAIL, "Not enought buffer");
 559
 560                 ret = exec_iptables_cmd(rule);
 561                 ret_value_msg_if(ret != STC_ERROR_NONE, STC_ERROR_FAIL,
 562                                  "Can't set conditional block for engress"
 563                                  " traffic, for classid %u, cmd %s, j %s",
 564                                  rule->classid, set_cmd, jump_cmd);
 565
 566                 if (rule->action == NFACCT_ACTION_DELETE) {
 567                         rule->iptables_rule = nfacct_send_del;
 568                         /* not effective, it's better to replace
 569                          * set_finalize_flag by set_property,
 570                          * due keep_counter it necessary only for
 571                          * setting iptables_rule */
 572                         set_finalize_flag(rule);
 573                         nfacct_send_get(rule);
 574                         ret = nfacct_send_del(rule);
 575                         ret_value_msg_if(ret != STC_ERROR_NONE, ret,
 576                                          "can't del quota counter");
 577                 }
 578         }
 579         return STC_ERROR_NONE;
 580 }
 581
 582 static stc_error_e produce_iface_rule(nfacct_rule_s *rule)
 583 {
 584         if (rule == NULL)
 585                 return STC_ERROR_INVALID_PARAMETER;
 586
 587         char *set_cmd = get_iptables_cmd(rule->action);
 588         char *jump_cmd = get_iptables_jump(rule->jump);
 589         char nfacct_buf[sizeof(NFACCT_NAME_MOD) +
 590                 3*MAX_DEC_SIZE(int) + 4];
 591         uint32_t classid = rule->classid;
 592         stc_error_e ret;
 593
 594         if (rule->iotype & NFACCT_COUNTER_IN) {
 595                 /* income part */
 596                 rule->iotype = NFACCT_COUNTER_IN;
 597                 rule->quota = rule->rcv_limit;
 598                 generate_counter_name(rule);
 599
 600                 if (rule->action != NFACCT_ACTION_DELETE) {
 601                         /* send delete comman in case of creation,
 602                          * because nfacct doesn't reset value for nfacct quota
 603                          * in case of quota existing */
 604                         ret = nfacct_send_del(rule);
 605                         ret_value_msg_if(ret != STC_ERROR_NONE, ret,
 606                                          "can't del quota counter");
 607
 608                         ret = nfacct_send_new(rule);
 609                         ret_value_msg_if(ret != STC_ERROR_NONE, ret,
 610                                          "can't set quota counter");
 611                         keep_counter(rule);
 612                 }
 613
 614                 ret = snprintf(nfacct_buf, sizeof(nfacct_buf),
 615                                NFACCT_NAME_MOD, rule->name);
 616                 ret_value_msg_if(ret > sizeof(nfacct_buf) || ret < 0,
 617                                  STC_ERROR_FAIL, "Not enought buffer");
 618
 619                 classid = rule->classid;
 620                 rule->classid = 0;
 621
 622                 ret = exec_iptables_cmd(rule);
 623                 ret_value_msg_if(ret != STC_ERROR_NONE, STC_ERROR_FAIL,
 624                                  "Can't set conditional block for ingress"
 625                                  " traffic, for iftype %d, cmd %s, j %s",
 626                                  rule->iftype, set_cmd, jump_cmd);
 627
 628                 //LCOV_EXCL_START
 629                 /* for tethering */
 630                 if (rule->intend == NFACCT_WARN ||
 631                     rule->intend == NFACCT_BLOCK) {
 632                         /* RULE_IFACE_OUT is not a misprint here */
 633                         nfacct_rule_direction temp_iotype = rule->iotype;
 634
 635                         rule->iotype = NFACCT_COUNTER_FORWARD;
 636                         ret = exec_iptables_cmd(rule);
 637                         rule->iotype = temp_iotype;
 638                         ret_value_msg_if(ret != STC_ERROR_NONE, STC_ERROR_FAIL,
 639                                          "Can't set forward rule for ingress "
 640                                          "traffic, for iftype %d, cmd %s, j %s",
 641                                          rule->iftype, set_cmd, jump_cmd);
 642                 }
 643                 /* tethering */
 644
 645                 if (rule->action == NFACCT_ACTION_DELETE) {
 646                         rule->iptables_rule = nfacct_send_del;
 647                         set_finalize_flag(rule);
 648                         nfacct_send_get(rule);
 649                         ret = nfacct_send_del(rule);
 650                         ret_value_msg_if(ret != STC_ERROR_NONE, ret,
 651                                          "can't del quota counter");
 652                 }
 653                 //LCOV_EXCL_STOP
 654         }
 655
 656         rule->classid = classid;
 657
 658         if (rule->iotype & NFACCT_COUNTER_OUT) {
 659                 /* outcome part */
 660                 rule->iotype = NFACCT_COUNTER_OUT;
 661                 rule->quota = rule->send_limit;
 662                 generate_counter_name(rule);
 663
 664                 if (rule->action != NFACCT_ACTION_DELETE) {
 665                         /* send delete comman in case of creation,
 666                          * because nfacct doesn't reset value for nfacct quota
 667                          * in case of quota existing */
 668                         ret = nfacct_send_del(rule);
 669                         ret_value_msg_if(ret != STC_ERROR_NONE, ret,
 670                                          "can't del quota counter");
 671
 672                         ret = nfacct_send_new(rule);
 673                         ret_value_msg_if(ret != STC_ERROR_NONE, ret,
 674                                          "can't set quota counter");
 675                         keep_counter(rule);
 676                 }
 677
 678                 ret = snprintf(nfacct_buf, sizeof(nfacct_buf),
 679                                NFACCT_NAME_MOD, rule->name);
 680                 ret_value_msg_if(ret > sizeof(nfacct_buf) || ret < 0,
 681                                  STC_ERROR_FAIL, "Not enough buffer");
 682
 683                 classid = rule->classid;
 684                 rule->classid = 0;
 685
 686                 ret = exec_iptables_cmd(rule);
 687                 ret_value_msg_if(ret != STC_ERROR_NONE, STC_ERROR_FAIL,
 688                                  "Can't set conditional block for "
 689                                  "engress traffic, for iftype %d, cmd %s, j %s",
 690                                  rule->iftype, set_cmd, jump_cmd);
 691
 692                 //LCOV_EXCL_START
 693                 /* for tethering  */
 694                 if (rule->intend == NFACCT_WARN ||
 695                     rule->intend == NFACCT_BLOCK) {
 696                         nfacct_rule_direction temp_iotype = rule->iotype;
 697
 698                         rule->iotype = NFACCT_COUNTER_OUT;
 699                         ret = exec_iptables_cmd(rule);
 700                         rule->iotype = temp_iotype;
 701                         ret_value_msg_if(ret != STC_ERROR_NONE, STC_ERROR_FAIL,
 702                                          "Can't set forward rule for engress "
 703                                          "traffic, for iftype %d, cmd %s, j %s",
 704                                          rule->iftype, set_cmd, jump_cmd);
 705                 }
 706                 /* tethering  */
 707
 708                 if (rule->action == NFACCT_ACTION_DELETE) {
 709                         rule->iptables_rule = nfacct_send_del;
 710                         set_finalize_flag(rule);
 711                         nfacct_send_get(rule);
 712                         ret = nfacct_send_del(rule);
 713                         ret_value_msg_if(ret != STC_ERROR_NONE, ret,
 714                                          "can't del quota counter");
 715                 }
 716                 //LCOV_EXCL_STOP
 717         }
 718         return STC_ERROR_NONE;
 719 }
 720
 721 stc_error_e produce_net_rule(nfacct_rule_s *rule)
 722 {
 723         stc_error_e ret = STC_ERROR_NONE;
 724
 725         if (rule == NULL)
 726                 return STC_ERROR_INVALID_PARAMETER;
 727
 728         if (rule->action == NFACCT_ACTION_APPEND &&
 729             rule->intend == NFACCT_WARN &&
 730             !rule->send_limit && !rule->rcv_limit)
 731                 return STC_ERROR_NONE;
 732
 733         if (rule->classid != STC_ALL_APP_CLASSID &&
 734             rule->classid != STC_TETHERING_APP_CLASSID &&
 735             rule->classid != STC_TOTAL_DATACALL_CLASSID &&
 736             rule->classid != STC_TOTAL_WIFI_CLASSID &&
 737             rule->classid != STC_TOTAL_BLUETOOTH_CLASSID &&
 738             rule->classid != STC_TOTAL_IPV4_CLASSID &&
 739             rule->classid != STC_TOTAL_IPV6_CLASSID)
 740                 ret = produce_app_rule(rule);
 741         else
 742                 ret = produce_iface_rule(rule);
 743
 744         return ret;
 745 }
 746
 747 void generate_counter_name(nfacct_rule_s *counter)
 748 {
 749         char warn_symbol = 'c';
 750         if (!strlen(counter->ifname)) {
 751                 char *iftype_name = get_iftype_name(counter->iftype);
 752                 /* trace counter name, maybe name was already generated */
 753                 ret_msg_if(iftype_name == NULL,
 754                            "Can't get interface name for counter %s, iftype %d)!",
 755                            counter->name, counter->iftype);
 756                 STRING_SAVE_COPY(counter->ifname, iftype_name);
 757         }
 758
 759         if (counter->intend  == NFACCT_WARN)
 760                 warn_symbol = 'w';
 761         else if (counter->intend  == NFACCT_BLOCK)
 762                 warn_symbol = 'r';
 763         else if (counter->intend  == NFACCT_ALLOW)
 764                 warn_symbol = 'a';
 765         snprintf(counter->name, NFACCT_NAME_MAX, "%c%d_%d_%d_%s",
 766                  warn_symbol, counter->iotype, counter->iftype,
 767                  counter->classid, counter->ifname);
 768 }
 769