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 #if 0
 289         /* ========================================================
 290          * NOTE:-
 291          * Below parsing for tethering case is not in use
 292          * stc-manager needs to ignore this for NFACCT_TETH_COUNTER
 293          * this is disbaled for future use.
 294          * =======================================================*/
 295
 296         //LCOV_EXCL_START
 297         if (cnt->intend == NFACCT_TETH_COUNTER) {
 298                 char ifname_buf[MAX_IFACE_LENGTH];
 299                 int ifname_len;
 300                 stc_iface_type_e iface;
 301                 /* tbnep+:seth_w0; means comes by bt go away by mobile interface,
 302                  * it's outgoing traffic, due all tethering is mobile databased */
 303                 iftype_part = strchr(name, ':');
 304                 ret_value_msg_if(iftype_part == NULL,
 305                                  false, "Invalid format of the tethering counter %s", name);
 306                 ifname_len = iftype_part - name - 1;
 307                 strncpy(ifname_buf, name + 1, ifname_len); /* skip first t */
 308                 ifname_buf[ifname_len] = '\0';
 309                 iface = get_iftype_by_name(ifname_buf);
 310                 /* check first part is it datacall */
 311                 if (iface == STC_IFACE_DATACALL) {
 312                         strncpy(cnt->ifname, ifname_buf, MAX_IFACE_LENGTH - 1);
 313                         cnt->iotype = NFACCT_COUNTER_IN;
 314                 } else {
 315                         /* +1, due : symbol and till the end of cnt_name */
 316                         strncpy(ifname_buf, iftype_part + 1, MAX_IFACE_LENGTH - 1);
 317                         iface = get_iftype_by_name(ifname_buf);
 318                         if (iface == STC_IFACE_DATACALL) {
 319                                 cnt->iotype = NFACCT_COUNTER_OUT;
 320                                 strncpy(cnt->ifname, ifname_buf, MAX_IFACE_LENGTH - 1);
 321                         }
 322                 }
 323
 324                 if (cnt->iotype == NFACCT_COUNTER_UNKNOWN) {
 325                         STC_LOGE("can't determine tethering direction %s", name);
 326                         return false;
 327                 }
 328                 cnt->iftype = STC_IFACE_DATACALL;
 329                 cnt->classid = STC_TETHERING_APP_CLASSID;
 330                 return true;
 331         }
 332         //LCOV_EXCL_STOP
 333 #endif
 334
 335         io_part = strtok_r(name, "_", &save_ptr);
 336         if (io_part != NULL)
 337                 cnt->iotype = convert_to_iotype(atoi(io_part + 1));
 338         else
 339                 return false;
 340
 341         iftype_part = strtok_r(NULL, "_", &save_ptr);
 342         if (iftype_part != NULL)
 343                 cnt->iftype = convert_to_iftype(atoi(iftype_part));
 344         else
 345                 return false;
 346
 347         classid_part = strtok_r(NULL, "_", &save_ptr);
 348         if (classid_part != NULL)
 349                 cnt->classid = atoi(classid_part);
 350         else {
 351                 cnt->classid = STC_ALL_APP_CLASSID;
 352                 return cnt->intend == NFACCT_BLOCK ? true : false;
 353         }
 354
 355         ifname_part = strtok_r(NULL, "\0", &save_ptr);
 356         if (ifname_part != NULL)
 357                 STRING_SAVE_COPY(cnt->ifname, ifname_part);
 358         else
 359                 return false;
 360
 361         return true;
 362 }
 363
 364 static void _process_answer(struct netlink_serialization_params *params)
 365 {
 366         struct rtattr *na;
 367         struct rtattr *attr_list[__NFACCT_MAX] = {0};
 368         struct counter_arg *carg = params->carg;
 369         struct genl *ans = params->ans;;
 370         struct nlmsghdr *nlhdr = &ans->n;
 371         int len = GENLMSG_PAYLOAD(nlhdr);
 372         int ans_len = carg->ans_len;
 373
 374         if (len == 0)
 375                 return;
 376
 377         /* parse reply message */
 378         na = (struct rtattr *)GENLMSG_DATA(ans);
 379
 380         while (NLMSG_OK(nlhdr, ans_len)) {
 381                 fill_attribute_list(attr_list, NFACCT_MAX,
 382                                     na, len);
 383                 if (!attr_list[NFACCT_NAME] ||
 384                     !attr_list[NFACCT_BYTES])
 385                         goto next;
 386                 params->eval_attr(attr_list, carg);
 387
 388 next:
 389                 nlhdr = NLMSG_NEXT(nlhdr, ans_len);
 390                 if (ans_len < 0)
 391                         break;
 392                 na = (struct rtattr *)GENLMSG_DATA(nlhdr);
 393         }
 394
 395         if (params->post_eval_attr)
 396                 params->post_eval_attr(carg);
 397 }
 398
 399 netlink_serialization_command *
 400 netlink_create_command(struct netlink_serialization_params *params)
 401 {
 402         static netlink_serialization_command command = {0,};
 403         command.deserialize_answer = _process_answer;
 404         command.params = *params;
 405         return &command;
 406 }
 407
 408 static char *get_iptables_cmd(const nfacct_rule_action action)
 409 {
 410         if (action == NFACCT_ACTION_APPEND)
 411                 return APPEND;
 412         else if (action == NFACCT_ACTION_DELETE)
 413                 return DELETE;
 414         else if (action == NFACCT_ACTION_INSERT)
 415                 return INSERT;
 416
 417         return "";
 418 }
 419
 420 static char *get_iptables_chain(const nfacct_rule_direction iotype)
 421 {
 422         if (iotype == NFACCT_COUNTER_IN)
 423                 return STC_IN_CHAIN;
 424         else if (iotype == NFACCT_COUNTER_OUT)
 425                 return STC_OUT_CHAIN;
 426         else if (iotype == NFACCT_COUNTER_FORWARD) //LCOV_EXCL_LINE
 427                 return STC_FRWD_CHAIN; //LCOV_EXCL_LINE
 428
 429         return "";
 430 }
 431
 432 static char *get_iptables_jump(const nfacct_rule_jump jump)
 433 {
 434         if (jump == NFACCT_JUMP_ACCEPT)
 435                 return ACCEPT_RULE;
 436         else if (jump == NFACCT_JUMP_REJECT)
 437                 return REJECT_RULE;
 438
 439         return "";
 440 }
 441
 442 /*
 443 static char *choose_iftype_name(nfacct_rule_s *rule)
 444 {
 445         return strlen(rule->ifname) != 0 ? rule->ifname :
 446                 get_iftype_name(rule->iftype);
 447 }
 448 */
 449
 450 static stc_error_e exec_iptables_cmd(nfacct_rule_s *rule)
 451 {
 452         stc_error_e ret = STC_ERROR_NONE;
 453         iptables_ip_type_e iptype;
 454         iptables_rule_s iptables_rule;
 455         memset(&iptables_rule, 0, sizeof(iptables_rule_s));
 456
 457         iptables_rule.nfacct_name = g_strdup(rule->name);
 458         iptables_rule.ifname = g_strdup(rule->ifname);
 459         iptables_rule.target = g_strdup(get_iptables_jump(rule->jump));
 460
 461         /* In case of tehering rules use chain 'STC_TETHER' */
 462         if (rule->intend == NFACCT_TETH_COUNTER ||
 463                         rule->intend == NFACCT_TETH_ALLOW ||
 464                         rule->intend == NFACCT_TETH_BLOCK)
 465                 iptables_rule.chain = g_strdup(STC_TETHER_CHAIN);
 466         else
 467                 iptables_rule.chain = g_strdup(get_iptables_chain(rule->iotype));
 468
 469         iptables_rule.classid = rule->classid;
 470         iptables_rule.direction = (rule->iotype & NFACCT_COUNTER_IN) ?
 471                                         IPTABLES_DIRECTION_IN : IPTABLES_DIRECTION_OUT;
 472         iptype = (iptables_ip_type_e)rule->iptype;
 473
 474         /* specify the ip range type for source and destination */
 475         iptables_rule.s_iprange_type = rule->src_iprange_type;
 476         iptables_rule.d_iprange_type = rule->dst_iprange_type;
 477
 478         /* specify source and destination ip address if any */
 479         if (rule->src_ip1)
 480                 inet_aton(rule->src_ip1, &iptables_rule.s_ip1);
 481         if (rule->src_ip2)
 482                 inet_aton(rule->src_ip2, &iptables_rule.s_ip2);
 483         if (rule->dst_ip1)
 484                 inet_aton(rule->dst_ip1, &iptables_rule.d_ip1);
 485         if (rule->dst_ip2)
 486                 inet_aton(rule->dst_ip2, &iptables_rule.d_ip2);
 487
 488         if (rule->action == NFACCT_ACTION_DELETE) {
 489                 /* delete interface rule */
 490                 ret = iptables_remove(&iptables_rule, iptype);
 491         } else {
 492                 /* add interface rule */
 493                 ret = iptables_add(&iptables_rule, iptype);
 494         }
 495
 496         g_free(iptables_rule.nfacct_name);
 497         g_free(iptables_rule.ifname);
 498         g_free(iptables_rule.target);
 499         g_free(iptables_rule.chain);
 500
 501         return ret;
 502 }
 503
 504 static stc_error_e produce_app_rule(nfacct_rule_s *rule)
 505 {
 506         if (rule == NULL)
 507                 return STC_ERROR_INVALID_PARAMETER;
 508
 509         char *set_cmd = get_iptables_cmd(rule->action);
 510         char *jump_cmd = get_iptables_jump(rule->jump);
 511         char nfacct_buf[sizeof(NFACCT_NAME_MOD) +
 512                 3*MAX_DEC_SIZE(int) + 4 + 1];
 513         stc_error_e ret = STC_ERROR_NONE;
 514         uint32_t classid = rule->classid;
 515
 516         /* income part */
 517         if (rule->iotype & NFACCT_COUNTER_IN) {
 518                 rule->quota = rule->rcv_limit;
 519                 rule->iotype = NFACCT_COUNTER_IN;
 520                 generate_counter_name(rule);
 521
 522                 /* to support quated counter we need nfacct,
 523                  *      don't use it in case of just block without a limit
 524                  *      iow, send_limit = 0 and rcv_limit 0 */
 525                 if (rule->action != NFACCT_ACTION_DELETE) {
 526                         ret = nfacct_send_del(rule);
 527                         ret_value_msg_if(ret != STC_ERROR_NONE, ret,
 528                                          "can't del quota counter");
 529
 530                         ret = nfacct_send_new(rule);
 531                         ret_value_msg_if(ret != STC_ERROR_NONE, ret,
 532                                          "can't set nfacct counter");
 533                         keep_counter(rule);
 534                 }
 535
 536                 /* we have a counter, let's key in a rule, drop in case of
 537                  *  send_limit/rcv_limit */
 538                 ret = snprintf(nfacct_buf, sizeof(nfacct_buf), NFACCT_NAME_MOD,
 539                                rule->name);
 540                 ret_value_msg_if(ret > sizeof(nfacct_buf) || ret < 0,
 541                                  STC_ERROR_FAIL, "Not enought buffer");
 542
 543                 /* cgroup extention on FORWARD chain are not allowed
 544                  * remove classid info in case of tethering rules */
 545                 if (rule->intend == NFACCT_TETH_COUNTER ||
 546                                 rule->intend == NFACCT_TETH_ALLOW ||
 547                                 rule->intend == NFACCT_TETH_BLOCK) {
 548                         classid = rule->classid;
 549                         rule->classid = 0;
 550                 }
 551
 552                 ret = exec_iptables_cmd(rule);
 553
 554                 /* restore the classid info in case of tethering rule */
 555                 if (rule->intend == NFACCT_TETH_COUNTER ||
 556                                 rule->intend == NFACCT_TETH_ALLOW ||
 557                                 rule->intend == NFACCT_TETH_BLOCK)
 558                         rule->classid = classid;
 559
 560                 ret_value_msg_if(ret != STC_ERROR_NONE, STC_ERROR_FAIL,
 561                                  "Can't set conditional block for ingress"
 562                                  " traffic, for classid %u, cmd %s, j %s",
 563                                  rule->classid, set_cmd, jump_cmd);
 564
 565                 /* remove in any case */
 566                 if (rule->action == NFACCT_ACTION_DELETE) {
 567                         /* TODO here and everywhere should be not just a del,
 568                          *      here should be get counted value and than
 569                          *      set new counter with that value, but it's minor issue,
 570                          *      due it's not clear when actual counters was stored,
 571                          *      and based on which value settings made such decition */
 572                         rule->iptables_rule = nfacct_send_del;
 573                         set_finalize_flag(rule);
 574                         nfacct_send_get(rule);
 575                         ret = nfacct_send_del(rule);
 576                         ret_value_msg_if(ret != STC_ERROR_NONE, ret,
 577                                          "can't del quota counter");
 578                 }
 579         }
 580
 581         if (rule->iotype & NFACCT_COUNTER_OUT) {
 582                 /* outcome part */
 583                 rule->iotype = NFACCT_COUNTER_OUT;
 584                 rule->quota = rule->send_limit;
 585                 generate_counter_name(rule);
 586                 if (rule->action != NFACCT_ACTION_DELETE) {
 587                         ret = nfacct_send_del(rule);
 588                         ret_value_msg_if(ret != STC_ERROR_NONE, ret,
 589                                          "can't del quota counter");
 590
 591                         ret = nfacct_send_new(rule);
 592                         ret_value_msg_if(ret != STC_ERROR_NONE, ret,
 593                                          "can't set quota counter");
 594                         keep_counter(rule);
 595                 }
 596
 597                 ret = snprintf(nfacct_buf, sizeof(nfacct_buf), NFACCT_NAME_MOD,
 598                                rule->name);
 599                 ret_value_msg_if(ret > sizeof(nfacct_buf) || ret < 0,
 600                                  STC_ERROR_FAIL, "Not enought buffer");
 601
 602                 /* cgroup extention on FORWARD chain are not allowed
 603                  * remove classid info in case of tethering rules */
 604                 if (rule->intend == NFACCT_TETH_COUNTER ||
 605                                 rule->intend == NFACCT_TETH_ALLOW ||
 606                                 rule->intend == NFACCT_TETH_BLOCK) {
 607                         classid = rule->classid;
 608                         rule->classid = 0;
 609                 }
 610
 611                 ret = exec_iptables_cmd(rule);
 612
 613                 /* restore the classid info in case of tethering rule */
 614                 if (rule->intend == NFACCT_TETH_COUNTER ||
 615                                 rule->intend == NFACCT_TETH_ALLOW ||
 616                                 rule->intend == NFACCT_TETH_BLOCK)
 617                         rule->classid = classid;
 618
 619                 ret_value_msg_if(ret != STC_ERROR_NONE, STC_ERROR_FAIL,
 620                                  "Can't set conditional block for engress"
 621                                  " traffic, for classid %u, cmd %s, j %s",
 622                                  rule->classid, set_cmd, jump_cmd);
 623
 624                 if (rule->action == NFACCT_ACTION_DELETE) {
 625                         rule->iptables_rule = nfacct_send_del;
 626                         /* not effective, it's better to replace
 627                          * set_finalize_flag by set_property,
 628                          * due keep_counter it necessary only for
 629                          * setting iptables_rule */
 630                         set_finalize_flag(rule);
 631                         nfacct_send_get(rule);
 632                         ret = nfacct_send_del(rule);
 633                         ret_value_msg_if(ret != STC_ERROR_NONE, ret,
 634                                          "can't del quota counter");
 635                 }
 636         }
 637         return STC_ERROR_NONE;
 638 }
 639
 640 static stc_error_e produce_iface_rule(nfacct_rule_s *rule)
 641 {
 642         if (rule == NULL)
 643                 return STC_ERROR_INVALID_PARAMETER;
 644
 645         char *set_cmd = get_iptables_cmd(rule->action);
 646         char *jump_cmd = get_iptables_jump(rule->jump);
 647         char nfacct_buf[sizeof(NFACCT_NAME_MOD) +
 648                 3*MAX_DEC_SIZE(int) + 4 + 1];
 649         uint32_t classid = rule->classid;
 650         stc_error_e ret;
 651
 652         if (rule->iotype & NFACCT_COUNTER_IN) {
 653                 /* income part */
 654                 rule->iotype = NFACCT_COUNTER_IN;
 655                 rule->quota = rule->rcv_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 enought 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 ingress"
 683                                  " 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                         /* RULE_IFACE_OUT is not a misprint here */
 691                         nfacct_rule_direction temp_iotype = rule->iotype;
 692
 693                         rule->iotype = NFACCT_COUNTER_FORWARD;
 694                         ret = exec_iptables_cmd(rule);
 695                         rule->iotype = temp_iotype;
 696                         ret_value_msg_if(ret != STC_ERROR_NONE, STC_ERROR_FAIL,
 697                                          "Can't set forward rule for ingress "
 698                                          "traffic, for iftype %d, cmd %s, j %s",
 699                                          rule->iftype, set_cmd, jump_cmd);
 700                 }
 701                 /* tethering */
 702
 703                 if (rule->action == NFACCT_ACTION_DELETE) {
 704                         rule->iptables_rule = nfacct_send_del;
 705                         set_finalize_flag(rule);
 706                         nfacct_send_get(rule);
 707                         ret = nfacct_send_del(rule);
 708                         ret_value_msg_if(ret != STC_ERROR_NONE, ret,
 709                                          "can't del quota counter");
 710                 }
 711                 //LCOV_EXCL_STOP
 712         }
 713
 714         rule->classid = classid;
 715
 716         if (rule->iotype & NFACCT_COUNTER_OUT) {
 717                 /* outcome part */
 718                 rule->iotype = NFACCT_COUNTER_OUT;
 719                 rule->quota = rule->send_limit;
 720                 generate_counter_name(rule);
 721
 722                 if (rule->action != NFACCT_ACTION_DELETE) {
 723                         /* send delete comman in case of creation,
 724                          * because nfacct doesn't reset value for nfacct quota
 725                          * in case of quota existing */
 726                         ret = nfacct_send_del(rule);
 727                         ret_value_msg_if(ret != STC_ERROR_NONE, ret,
 728                                          "can't del quota counter");
 729
 730                         ret = nfacct_send_new(rule);
 731                         ret_value_msg_if(ret != STC_ERROR_NONE, ret,
 732                                          "can't set quota counter");
 733                         keep_counter(rule);
 734                 }
 735
 736                 ret = snprintf(nfacct_buf, sizeof(nfacct_buf),
 737                                NFACCT_NAME_MOD, rule->name);
 738                 ret_value_msg_if(ret > sizeof(nfacct_buf) || ret < 0,
 739                                  STC_ERROR_FAIL, "Not enough buffer");
 740
 741                 classid = rule->classid;
 742                 rule->classid = 0;
 743
 744                 ret = exec_iptables_cmd(rule);
 745                 ret_value_msg_if(ret != STC_ERROR_NONE, STC_ERROR_FAIL,
 746                                  "Can't set conditional block for "
 747                                  "engress traffic, for iftype %d, cmd %s, j %s",
 748                                  rule->iftype, set_cmd, jump_cmd);
 749
 750                 //LCOV_EXCL_START
 751                 /* for tethering  */
 752                 if (rule->intend == NFACCT_WARN ||
 753                     rule->intend == NFACCT_BLOCK) {
 754                         nfacct_rule_direction temp_iotype = rule->iotype;
 755
 756                         rule->iotype = NFACCT_COUNTER_OUT;
 757                         ret = exec_iptables_cmd(rule);
 758                         rule->iotype = temp_iotype;
 759                         ret_value_msg_if(ret != STC_ERROR_NONE, STC_ERROR_FAIL,
 760                                          "Can't set forward rule for engress "
 761                                          "traffic, for iftype %d, cmd %s, j %s",
 762                                          rule->iftype, set_cmd, jump_cmd);
 763                 }
 764                 /* tethering  */
 765
 766                 if (rule->action == NFACCT_ACTION_DELETE) {
 767                         rule->iptables_rule = nfacct_send_del;
 768                         set_finalize_flag(rule);
 769                         nfacct_send_get(rule);
 770                         ret = nfacct_send_del(rule);
 771                         ret_value_msg_if(ret != STC_ERROR_NONE, ret,
 772                                          "can't del quota counter");
 773                 }
 774                 //LCOV_EXCL_STOP
 775         }
 776
 777         rule->classid = classid;
 778
 779         return STC_ERROR_NONE;
 780 }
 781
 782 stc_error_e produce_net_rule(nfacct_rule_s *rule)
 783 {
 784         stc_error_e ret = STC_ERROR_NONE;
 785
 786         if (rule == NULL)
 787                 return STC_ERROR_INVALID_PARAMETER;
 788
 789         if (rule->action == NFACCT_ACTION_APPEND &&
 790             rule->intend == NFACCT_WARN &&
 791             !rule->send_limit && !rule->rcv_limit)
 792                 return STC_ERROR_NONE;
 793
 794         if (rule->classid != STC_ALL_APP_CLASSID &&
 795             rule->classid != STC_TETHERING_APP_CLASSID &&
 796             rule->classid != STC_TOTAL_DATACALL_CLASSID &&
 797             rule->classid != STC_TOTAL_WIFI_CLASSID &&
 798             rule->classid != STC_TOTAL_BLUETOOTH_CLASSID &&
 799             rule->classid != STC_TOTAL_IPV4_CLASSID &&
 800             rule->classid != STC_TOTAL_IPV6_CLASSID)
 801                 ret = produce_app_rule(rule);
 802         else
 803                 ret = produce_iface_rule(rule);
 804
 805         return ret;
 806 }
 807
 808 void generate_counter_name(nfacct_rule_s *counter)
 809 {
 810         char warn_symbol = 'c';
 811         if (!strlen(counter->ifname)) {
 812                 char *iftype_name = get_iftype_name(counter->iftype);
 813                 /* trace counter name, maybe name was already generated */
 814                 ret_msg_if(iftype_name == NULL,
 815                            "Can't get interface name for counter %s, iftype %d)!",
 816                            counter->name, counter->iftype);
 817                 STRING_SAVE_COPY(counter->ifname, iftype_name);
 818         }
 819
 820         if (counter->intend  == NFACCT_WARN ||
 821                         counter->intend == NFACCT_TETH_WARN)
 822                 warn_symbol = 'w';
 823         else if (counter->intend  == NFACCT_BLOCK ||
 824                         counter->intend == NFACCT_TETH_BLOCK)
 825                 warn_symbol = 'r';
 826         else if (counter->intend  == NFACCT_ALLOW ||
 827                         counter->intend == NFACCT_TETH_ALLOW)
 828                 warn_symbol = 'a';
 829         else if (counter->intend == NFACCT_TETH_COUNTER)
 830                 warn_symbol = 't';
 831         snprintf(counter->name, NFACCT_NAME_MAX, "%c%d_%d_%d_%s",
 832                  warn_symbol, counter->iotype, counter->iftype,
 833                  counter->classid, counter->ifname);
 834 }
 835