ubus.c

   1 /*
   2  *   This program is free software; you can redistribute it and/or modify
   3  *   it under the terms of the GNU General Public License as published by
   4  *   the Free Software Foundation; either version 2 of the License.
   5  *
   6  *   This program is distributed in the hope that it will be useful,
   7  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
   8  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   9  *   GNU General Public License for more details.
  10  *
  11  *   You should have received a copy of the GNU General Public License
  12  *   along with this program; if not, write to the Free Software
  13  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
  14  *
  15  *   Copyright (C) 2020 embedd.ch
  16  *   Copyright (C) 2020 Felix Fietkau <nbd@nbd.name>
  17  *   Copyright (C) 2020 John Crispin <john@phrozen.org>
  18  */
  19
  20 #include <sys/types.h>
  21 #include <sys/socket.h>
  22 #include <net/ethernet.h>
  23 #ifdef linux
  24 #include <netinet/ether.h>
  25 #endif
  26
  27 #include "usteer.h"
  28 #include "node.h"
  29 #include "event.h"
  30
  31 static struct blob_buf b;
  32
  33 static int
  34 usteer_ubus_get_clients(struct ubus_context *ctx, struct ubus_object *obj,
  35                        struct ubus_request_data *req, const char *method,
  36                        struct blob_attr *msg)
  37 {
  38         struct sta_info *si;
  39         struct sta *sta;
  40         char str[20];
  41         void *_s, *_cur_n;
  42
  43         blob_buf_init(&b, 0);
  44         avl_for_each_element(&stations, sta, avl) {
  45                 sprintf(str, MAC_ADDR_FMT, MAC_ADDR_DATA(sta->addr));
  46                 _s = blobmsg_open_table(&b, str);
  47                 list_for_each_entry(si, &sta->nodes, list) {
  48                         _cur_n = blobmsg_open_table(&b, usteer_node_name(si->node));
  49                         blobmsg_add_u8(&b, "connected", si->connected);
  50                         blobmsg_add_u32(&b, "signal", si->signal);
  51                         blobmsg_close_table(&b, _cur_n);
  52                 }
  53                 blobmsg_close_table(&b, _s);
  54         }
  55         ubus_send_reply(ctx, req, b.head);
  56         return 0;
  57 }
  58
  59 static struct blobmsg_policy client_arg[] = {
  60         { .name = "address", .type = BLOBMSG_TYPE_STRING, },
  61 };
  62
  63 static void
  64 usteer_ubus_add_stats(struct sta_info_stats *stats, const char *name)
  65 {
  66         void *s;
  67
  68         s = blobmsg_open_table(&b, name);
  69         blobmsg_add_u32(&b, "requests", stats->requests);
  70         blobmsg_add_u32(&b, "blocked_cur", stats->blocked_cur);
  71         blobmsg_add_u32(&b, "blocked_total", stats->blocked_total);
  72         blobmsg_close_table(&b, s);
  73 }
  74
  75 static int
  76 usteer_ubus_get_client_info(struct ubus_context *ctx, struct ubus_object *obj,
  77                            struct ubus_request_data *req, const char *method,
  78                            struct blob_attr *msg)
  79 {
  80         struct sta_info *si;
  81         struct sta *sta;
  82         struct blob_attr *mac_str;
  83         uint8_t *mac;
  84         void *_n, *_cur_n, *_s;
  85         int i;
  86
  87         blobmsg_parse(client_arg, 1, &mac_str, blob_data(msg), blob_len(msg));
  88         if (!mac_str)
  89                 return UBUS_STATUS_INVALID_ARGUMENT;
  90
  91         mac = (uint8_t *) ether_aton(blobmsg_data(mac_str));
  92         if (!mac)
  93                 return UBUS_STATUS_INVALID_ARGUMENT;
  94
  95         sta = usteer_sta_get(mac, false);
  96         if (!sta)
  97                 return UBUS_STATUS_NOT_FOUND;
  98
  99         blob_buf_init(&b, 0);
 100         blobmsg_add_u8(&b, "2ghz", sta->seen_2ghz);
 101         blobmsg_add_u8(&b, "5ghz", sta->seen_5ghz);
 102         _n = blobmsg_open_table(&b, "nodes");
 103         list_for_each_entry(si, &sta->nodes, list) {
 104                 _cur_n = blobmsg_open_table(&b, usteer_node_name(si->node));
 105                 blobmsg_add_u8(&b, "connected", si->connected);
 106                 blobmsg_add_u32(&b, "signal", si->signal);
 107                 _s = blobmsg_open_table(&b, "stats");
 108                 for (i = 0; i < __EVENT_TYPE_MAX; i++)
 109                         usteer_ubus_add_stats(&si->stats[EVENT_TYPE_PROBE], event_types[i]);
 110                 blobmsg_close_table(&b, _s);
 111                 blobmsg_close_table(&b, _cur_n);
 112         }
 113         blobmsg_close_table(&b, _n);
 114
 115         ubus_send_reply(ctx, req, b.head);
 116
 117         return 0;
 118 }
 119
 120 enum cfg_type {
 121         CFG_BOOL,
 122         CFG_I32,
 123         CFG_U32,
 124         CFG_ARRAY_CB,
 125         CFG_STRING_CB,
 126 };
 127
 128 struct cfg_item {
 129         enum cfg_type type;
 130         union {
 131                 bool *BOOL;
 132                 uint32_t *U32;
 133                 int32_t *I32;
 134                 struct {
 135                         void (*set)(struct blob_attr *data);
 136                         void (*get)(struct blob_buf *buf);
 137                 } CB;
 138         } ptr;
 139 };
 140
 141 #define __config_items \
 142         _cfg(BOOL, syslog), \
 143         _cfg(U32, debug_level), \
 144         _cfg(U32, sta_block_timeout), \
 145         _cfg(U32, local_sta_timeout), \
 146         _cfg(U32, local_sta_update), \
 147         _cfg(U32, max_retry_band), \
 148         _cfg(U32, seen_policy_timeout), \
 149         _cfg(U32, load_balancing_threshold), \
 150         _cfg(U32, band_steering_threshold), \
 151         _cfg(U32, remote_update_interval), \
 152         _cfg(BOOL, assoc_steering), \
 153         _cfg(I32, min_connect_snr), \
 154         _cfg(I32, min_snr), \
 155         _cfg(I32, roam_scan_snr), \
 156         _cfg(U32, roam_scan_tries), \
 157         _cfg(U32, roam_scan_interval), \
 158         _cfg(I32, roam_trigger_snr), \
 159         _cfg(U32, roam_trigger_interval), \
 160         _cfg(U32, roam_kick_delay), \
 161         _cfg(U32, signal_diff_threshold), \
 162         _cfg(U32, initial_connect_delay), \
 163         _cfg(BOOL, load_kick_enabled), \
 164         _cfg(U32, load_kick_threshold), \
 165         _cfg(U32, load_kick_delay), \
 166         _cfg(U32, load_kick_min_clients), \
 167         _cfg(U32, load_kick_reason_code), \
 168         _cfg(ARRAY_CB, interfaces), \
 169         _cfg(STRING_CB, node_up_script), \
 170         _cfg(ARRAY_CB, event_log_types), \
 171         _cfg(ARRAY_CB, ssid_list)
 172
 173 enum cfg_items {
 174 #define _cfg(_type, _name) CFG_##_name
 175         __config_items,
 176 #undef _cfg
 177         __CFG_MAX,
 178 };
 179
 180 static const struct blobmsg_policy config_policy[__CFG_MAX] = {
 181 #define _cfg_policy(_type, _name) [CFG_##_name] = { .name = #_name, .type = BLOBMSG_TYPE_ ## _type }
 182 #define _cfg_policy_BOOL(_name) _cfg_policy(BOOL, _name)
 183 #define _cfg_policy_U32(_name) _cfg_policy(INT32, _name)
 184 #define _cfg_policy_I32(_name) _cfg_policy(INT32, _name)
 185 #define _cfg_policy_ARRAY_CB(_name) _cfg_policy(ARRAY, _name)
 186 #define _cfg_policy_STRING_CB(_name) _cfg_policy(STRING, _name)
 187 #define _cfg(_type, _name) _cfg_policy_##_type(_name)
 188         __config_items,
 189 #undef _cfg
 190 };
 191
 192 static const struct cfg_item config_data[__CFG_MAX] = {
 193 #define _cfg_data_BOOL(_name) .ptr.BOOL = &config._name
 194 #define _cfg_data_U32(_name) .ptr.U32 = &config._name
 195 #define _cfg_data_I32(_name) .ptr.I32 = &config._name
 196 #define _cfg_data_ARRAY_CB(_name) .ptr.CB = { .set = config_set_##_name, .get = config_get_##_name }
 197 #define _cfg_data_STRING_CB(_name) .ptr.CB = { .set = config_set_##_name, .get = config_get_##_name }
 198 #define _cfg(_type, _name) [CFG_##_name] = { .type = CFG_##_type, _cfg_data_##_type(_name) }
 199         __config_items,
 200 #undef _cfg
 201 };
 202
 203 static int
 204 usteer_ubus_get_config(struct ubus_context *ctx, struct ubus_object *obj,
 205                       struct ubus_request_data *req, const char *method,
 206                       struct blob_attr *msg)
 207 {
 208         int i;
 209
 210         blob_buf_init(&b, 0);
 211         for (i = 0; i < __CFG_MAX; i++) {
 212                 switch(config_data[i].type) {
 213                 case CFG_BOOL:
 214                         blobmsg_add_u8(&b, config_policy[i].name,
 215                                         *config_data[i].ptr.BOOL);
 216                         break;
 217                 case CFG_I32:
 218                 case CFG_U32:
 219                         blobmsg_add_u32(&b, config_policy[i].name,
 220                                         *config_data[i].ptr.U32);
 221                         break;
 222                 case CFG_ARRAY_CB:
 223                 case CFG_STRING_CB:
 224                         config_data[i].ptr.CB.get(&b);
 225                         break;
 226                 }
 227         }
 228         ubus_send_reply(ctx, req, b.head);
 229         return 0;
 230 }
 231
 232 static int
 233 usteer_ubus_set_config(struct ubus_context *ctx, struct ubus_object *obj,
 234                       struct ubus_request_data *req, const char *method,
 235                       struct blob_attr *msg)
 236 {
 237         struct blob_attr *tb[__CFG_MAX];
 238         int i;
 239
 240         if (!strcmp(method, "set_config"))
 241                 usteer_init_defaults();
 242
 243         blobmsg_parse(config_policy, __CFG_MAX, tb, blob_data(msg), blob_len(msg));
 244         for (i = 0; i < __CFG_MAX; i++) {
 245                 switch(config_data[i].type) {
 246                 case CFG_BOOL:
 247                         if (!tb[i])
 248                                 continue;
 249
 250                         *config_data[i].ptr.BOOL = blobmsg_get_u8(tb[i]);
 251                         break;
 252                 case CFG_I32:
 253                 case CFG_U32:
 254                         if (!tb[i])
 255                                 continue;
 256
 257                         *config_data[i].ptr.U32 = blobmsg_get_u32(tb[i]);
 258                         break;
 259                 case CFG_ARRAY_CB:
 260                 case CFG_STRING_CB:
 261                         config_data[i].ptr.CB.set(tb[i]);
 262                         break;
 263                 }
 264         }
 265
 266         return 0;
 267 }
 268
 269 static void
 270 usteer_dump_node(struct usteer_node *node)
 271 {
 272         void *c;
 273
 274         c = blobmsg_open_table(&b, usteer_node_name(node));
 275         blobmsg_add_u32(&b, "freq", node->freq);
 276         blobmsg_add_u32(&b, "n_assoc", node->n_assoc);
 277         blobmsg_add_u32(&b, "noise", node->noise);
 278         blobmsg_add_u32(&b, "load", node->load);
 279         blobmsg_add_u32(&b, "max_assoc", node->max_assoc);
 280         if (node->rrm_nr)
 281                 blobmsg_add_field(&b, BLOBMSG_TYPE_ARRAY, "rrm_nr",
 282                                   blobmsg_data(node->rrm_nr),
 283                                   blobmsg_data_len(node->rrm_nr));
 284         if (node->script_data)
 285                 blobmsg_add_field(&b, BLOBMSG_TYPE_TABLE, "script_data",
 286                                   blob_data(node->script_data),
 287                                   blob_len(node->script_data));
 288
 289         blobmsg_close_table(&b, c);
 290 }
 291
 292 static int
 293 usteer_ubus_local_info(struct ubus_context *ctx, struct ubus_object *obj,
 294                       struct ubus_request_data *req, const char *method,
 295                       struct blob_attr *msg)
 296 {
 297         struct usteer_node *node;
 298
 299         blob_buf_init(&b, 0);
 300
 301         for_each_local_node(node)
 302                 usteer_dump_node(node);
 303
 304         ubus_send_reply(ctx, req, b.head);
 305
 306         return 0;
 307 }
 308
 309 static int
 310 usteer_ubus_remote_info(struct ubus_context *ctx, struct ubus_object *obj,
 311                        struct ubus_request_data *req, const char *method,
 312                        struct blob_attr *msg)
 313 {
 314         struct usteer_remote_node *rn;
 315
 316         blob_buf_init(&b, 0);
 317
 318         avl_for_each_element(&remote_nodes, rn, avl)
 319                 usteer_dump_node(&rn->node);
 320
 321         ubus_send_reply(ctx, req, b.head);
 322
 323         return 0;
 324 }
 325
 326 enum {
 327         NODE_DATA_NODE,
 328         NODE_DATA_VALUES,
 329         __NODE_DATA_MAX,
 330 };
 331
 332 static const struct blobmsg_policy set_node_data_policy[] = {
 333         [NODE_DATA_NODE] = { "node", BLOBMSG_TYPE_STRING },
 334         [NODE_DATA_VALUES] = { "data", BLOBMSG_TYPE_TABLE },
 335 };
 336
 337 static const struct blobmsg_policy del_node_data_policy[] = {
 338         [NODE_DATA_NODE] = { "node", BLOBMSG_TYPE_STRING },
 339         [NODE_DATA_VALUES] = { "names", BLOBMSG_TYPE_ARRAY },
 340 };
 341
 342 static void
 343 __usteer_ubus_update_node_data(struct usteer_local_node *ln, struct blob_attr *data,
 344                                bool delete)
 345 {
 346         struct blob_attr *cur;
 347         int rem;
 348
 349         blobmsg_for_each_attr(cur, data, rem) {
 350                 if (delete)
 351                         kvlist_delete(&ln->script_data, blobmsg_get_string(cur));
 352                 else
 353                         kvlist_set(&ln->script_data, blobmsg_name(cur), cur);
 354         }
 355
 356         usteer_local_node_update_script_data(ln);
 357 }
 358
 359 static int
 360 usteer_ubus_update_node_data(struct ubus_context *ctx, struct ubus_object *obj,
 361                              struct ubus_request_data *req, const char *method,
 362                              struct blob_attr *msg)
 363 {
 364         const struct blobmsg_policy *policy;
 365         struct blob_attr *tb[__NODE_DATA_MAX];
 366         struct usteer_local_node *ln;
 367         struct blob_attr *val;
 368         const char *name;
 369         bool delete;
 370
 371         delete = !strncmp(method, "del", 3);
 372         policy = delete ? del_node_data_policy : set_node_data_policy;
 373
 374         blobmsg_parse(policy, __NODE_DATA_MAX, tb, blob_data(msg), blob_len(msg));
 375         if (!tb[NODE_DATA_NODE] || !tb[NODE_DATA_VALUES])
 376                 return UBUS_STATUS_INVALID_ARGUMENT;
 377
 378         name = blobmsg_get_string(tb[NODE_DATA_NODE]);
 379         val = tb[NODE_DATA_VALUES];
 380         if (delete && blobmsg_check_array(val, BLOBMSG_TYPE_STRING) < 0)
 381                 return UBUS_STATUS_INVALID_ARGUMENT;
 382
 383         if (strcmp(name, "*") != 0) {
 384                 ln = avl_find_element(&local_nodes, name, ln, node.avl);
 385                 if (!ln)
 386                         return UBUS_STATUS_NOT_FOUND;
 387
 388                 __usteer_ubus_update_node_data(ln, val, delete);
 389
 390                 return 0;
 391         }
 392
 393         avl_for_each_element(&local_nodes, ln, node.avl)
 394                 __usteer_ubus_update_node_data(ln, val, delete);
 395
 396         return 0;
 397 }
 398
 399 static const struct ubus_method usteer_methods[] = {
 400         UBUS_METHOD_NOARG("local_info", usteer_ubus_local_info),
 401         UBUS_METHOD_NOARG("remote_info", usteer_ubus_remote_info),
 402         UBUS_METHOD_NOARG("get_clients", usteer_ubus_get_clients),
 403         UBUS_METHOD("get_client_info", usteer_ubus_get_client_info, client_arg),
 404         UBUS_METHOD_NOARG("get_config", usteer_ubus_get_config),
 405         UBUS_METHOD("set_config", usteer_ubus_set_config, config_policy),
 406         UBUS_METHOD("update_config", usteer_ubus_set_config, config_policy),
 407         UBUS_METHOD("set_node_data", usteer_ubus_update_node_data, set_node_data_policy),
 408         UBUS_METHOD("delete_node_data", usteer_ubus_update_node_data, del_node_data_policy),
 409 };
 410
 411 static struct ubus_object_type usteer_obj_type =
 412         UBUS_OBJECT_TYPE("usteer", usteer_methods);
 413
 414 struct ubus_object usteer_obj = {
 415         .name = "usteer",
 416         .type = &usteer_obj_type,
 417         .methods = usteer_methods,
 418         .n_methods = ARRAY_SIZE(usteer_methods),
 419 };
 420
 421 static void
 422 usteer_add_nr_entry(struct usteer_node *ln, struct usteer_node *node)
 423 {
 424         struct blobmsg_policy policy[3] = {
 425                 { .type = BLOBMSG_TYPE_STRING },
 426                 { .type = BLOBMSG_TYPE_STRING },
 427                 { .type = BLOBMSG_TYPE_STRING },
 428         };
 429         struct blob_attr *tb[3];
 430
 431         if (!node->rrm_nr)
 432                 return;
 433
 434         if (strcmp(ln->ssid, node->ssid) != 0)
 435                 return;
 436
 437         blobmsg_parse_array(policy, ARRAY_SIZE(tb), tb,
 438                             blobmsg_data(node->rrm_nr),
 439                             blobmsg_data_len(node->rrm_nr));
 440         if (!tb[2])
 441                 return;
 442
 443         blobmsg_add_field(&b, BLOBMSG_TYPE_STRING, "",
 444                           blobmsg_data(tb[2]),
 445                           blobmsg_data_len(tb[2]));
 446 }
 447
 448 int usteer_ubus_notify_client_disassoc(struct sta_info *si)
 449 {
 450         struct usteer_local_node *ln = container_of(si->node, struct usteer_local_node, node);
 451         struct usteer_remote_node *rn;
 452         struct usteer_node *node;
 453         void *c;
 454
 455         blob_buf_init(&b, 0);
 456         blobmsg_printf(&b, "addr", MAC_ADDR_FMT, MAC_ADDR_DATA(si->sta->addr));
 457         blobmsg_add_u32(&b, "duration", config.roam_kick_delay);
 458         c = blobmsg_open_array(&b, "neighbors");
 459         for_each_local_node(node)
 460                 usteer_add_nr_entry(si->node, node);
 461         avl_for_each_element(&remote_nodes, rn, avl)
 462                 usteer_add_nr_entry(si->node, &rn->node);
 463         blobmsg_close_array(&b, c);
 464         return ubus_invoke(ubus_ctx, ln->obj_id, "wnm_disassoc_imminent", b.head, NULL, 0, 100);
 465 }
 466
 467 int usteer_ubus_trigger_client_scan(struct sta_info *si)
 468 {
 469         struct usteer_local_node *ln = container_of(si->node, struct usteer_local_node, node);
 470
 471         si->scan_band = !si->scan_band;
 472
 473         blob_buf_init(&b, 0);
 474         blobmsg_printf(&b, "addr", MAC_ADDR_FMT, MAC_ADDR_DATA(si->sta->addr));
 475         blobmsg_add_u32(&b, "mode", 1);
 476         blobmsg_add_u32(&b, "duration", 65535);
 477         blobmsg_add_u32(&b, "channel", 255);
 478         blobmsg_add_u32(&b, "op_class", si->scan_band ? 1 : 12);
 479         return ubus_invoke(ubus_ctx, ln->obj_id, "rrm_beacon_req", b.head, NULL, 0, 100);
 480 }
 481
 482 void usteer_ubus_kick_client(struct sta_info *si)
 483 {
 484         struct usteer_local_node *ln = container_of(si->node, struct usteer_local_node, node);
 485
 486         blob_buf_init(&b, 0);
 487         blobmsg_printf(&b, "addr", MAC_ADDR_FMT, MAC_ADDR_DATA(si->sta->addr));
 488         blobmsg_add_u32(&b, "reason", config.load_kick_reason_code);
 489         blobmsg_add_u8(&b, "deauth", 1);
 490         ubus_invoke(ubus_ctx, ln->obj_id, "del_client", b.head, NULL, 0, 100);
 491         si->connected = 0;
 492         si->roam_kick = current_time;
 493 }
 494
 495 void usteer_ubus_init(struct ubus_context *ctx)
 496 {
 497         ubus_add_object(ctx, &usteer_obj);
 498 }