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