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 static KVLIST(host_info, kvlist_blob_len);
  33
  34 static int
  35 usteer_ubus_get_clients(struct ubus_context *ctx, struct ubus_object *obj,
  36                        struct ubus_request_data *req, const char *method,
  37                        struct blob_attr *msg)
  38 {
  39         struct sta_info *si;
  40         struct sta *sta;
  41         char str[20];
  42         void *_s, *_cur_n;
  43
  44         blob_buf_init(&b, 0);
  45         avl_for_each_element(&stations, sta, avl) {
  46                 sprintf(str, MAC_ADDR_FMT, MAC_ADDR_DATA(sta->addr));
  47                 _s = blobmsg_open_table(&b, str);
  48                 list_for_each_entry(si, &sta->nodes, list) {
  49                         _cur_n = blobmsg_open_table(&b, usteer_node_name(si->node));
  50                         blobmsg_add_u8(&b, "connected", si->connected);
  51                         blobmsg_add_u32(&b, "signal", si->signal);
  52                         blobmsg_close_table(&b, _cur_n);
  53                 }
  54                 blobmsg_close_table(&b, _s);
  55         }
  56         ubus_send_reply(ctx, req, b.head);
  57         return 0;
  58 }
  59
  60 static struct blobmsg_policy client_arg[] = {
  61         { .name = "address", .type = BLOBMSG_TYPE_STRING, },
  62 };
  63
  64 static void
  65 usteer_ubus_add_stats(struct sta_info_stats *stats, const char *name)
  66 {
  67         void *s;
  68
  69         s = blobmsg_open_table(&b, name);
  70         blobmsg_add_u32(&b, "requests", stats->requests);
  71         blobmsg_add_u32(&b, "blocked_cur", stats->blocked_cur);
  72         blobmsg_add_u32(&b, "blocked_total", stats->blocked_total);
  73         blobmsg_close_table(&b, s);
  74 }
  75
  76 static int
  77 usteer_ubus_get_client_info(struct ubus_context *ctx, struct ubus_object *obj,
  78                            struct ubus_request_data *req, const char *method,
  79                            struct blob_attr *msg)
  80 {
  81         struct sta_info *si;
  82         struct sta *sta;
  83         struct blob_attr *mac_str;
  84         uint8_t *mac;
  85         void *_n, *_cur_n, *_s;
  86         int i;
  87
  88         blobmsg_parse(client_arg, 1, &mac_str, blob_data(msg), blob_len(msg));
  89         if (!mac_str)
  90                 return UBUS_STATUS_INVALID_ARGUMENT;
  91
  92         mac = (uint8_t *) ether_aton(blobmsg_data(mac_str));
  93         if (!mac)
  94                 return UBUS_STATUS_INVALID_ARGUMENT;
  95
  96         sta = usteer_sta_get(mac, false);
  97         if (!sta)
  98                 return UBUS_STATUS_NOT_FOUND;
  99
 100         blob_buf_init(&b, 0);
 101         blobmsg_add_u8(&b, "2ghz", sta->seen_2ghz);
 102         blobmsg_add_u8(&b, "5ghz", sta->seen_5ghz);
 103         _n = blobmsg_open_table(&b, "nodes");
 104         list_for_each_entry(si, &sta->nodes, list) {
 105                 _cur_n = blobmsg_open_table(&b, usteer_node_name(si->node));
 106                 blobmsg_add_u8(&b, "connected", si->connected);
 107                 blobmsg_add_u32(&b, "signal", si->signal);
 108                 _s = blobmsg_open_table(&b, "stats");
 109                 for (i = 0; i < __EVENT_TYPE_MAX; i++)
 110                         usteer_ubus_add_stats(&si->stats[EVENT_TYPE_PROBE], event_types[i]);
 111                 blobmsg_close_table(&b, _s);
 112                 blobmsg_close_table(&b, _cur_n);
 113         }
 114         blobmsg_close_table(&b, _n);
 115
 116         ubus_send_reply(ctx, req, b.head);
 117
 118         return 0;
 119 }
 120
 121 enum cfg_type {
 122         CFG_BOOL,
 123         CFG_I32,
 124         CFG_U32,
 125         CFG_ARRAY_CB,
 126         CFG_STRING_CB,
 127 };
 128
 129 struct cfg_item {
 130         enum cfg_type type;
 131         union {
 132                 bool *BOOL;
 133                 uint32_t *U32;
 134                 int32_t *I32;
 135                 struct {
 136                         void (*set)(struct blob_attr *data);
 137                         void (*get)(struct blob_buf *buf);
 138                 } CB;
 139         } ptr;
 140 };
 141
 142 #define __config_items \
 143         _cfg(BOOL, syslog), \
 144         _cfg(U32, debug_level), \
 145         _cfg(U32, sta_block_timeout), \
 146         _cfg(U32, local_sta_timeout), \
 147         _cfg(U32, local_sta_update), \
 148         _cfg(U32, max_retry_band), \
 149         _cfg(U32, seen_policy_timeout), \
 150         _cfg(U32, load_balancing_threshold), \
 151         _cfg(U32, band_steering_threshold), \
 152         _cfg(U32, remote_update_interval), \
 153         _cfg(BOOL, assoc_steering), \
 154         _cfg(I32, min_connect_snr), \
 155         _cfg(I32, min_snr), \
 156         _cfg(I32, roam_scan_snr), \
 157         _cfg(U32, roam_scan_tries), \
 158         _cfg(U32, roam_scan_interval), \
 159         _cfg(I32, roam_trigger_snr), \
 160         _cfg(U32, roam_trigger_interval), \
 161         _cfg(U32, roam_kick_delay), \
 162         _cfg(U32, signal_diff_threshold), \
 163         _cfg(U32, initial_connect_delay), \
 164         _cfg(BOOL, load_kick_enabled), \
 165         _cfg(U32, load_kick_threshold), \
 166         _cfg(U32, load_kick_delay), \
 167         _cfg(U32, load_kick_min_clients), \
 168         _cfg(U32, load_kick_reason_code), \
 169         _cfg(ARRAY_CB, interfaces), \
 170         _cfg(STRING_CB, node_up_script), \
 171         _cfg(ARRAY_CB, event_log_types), \
 172         _cfg(ARRAY_CB, ssid_list)
 173
 174 enum cfg_items {
 175 #define _cfg(_type, _name) CFG_##_name
 176         __config_items,
 177 #undef _cfg
 178         __CFG_MAX,
 179 };
 180
 181 static const struct blobmsg_policy config_policy[__CFG_MAX] = {
 182 #define _cfg_policy(_type, _name) [CFG_##_name] = { .name = #_name, .type = BLOBMSG_TYPE_ ## _type }
 183 #define _cfg_policy_BOOL(_name) _cfg_policy(BOOL, _name)
 184 #define _cfg_policy_U32(_name) _cfg_policy(INT32, _name)
 185 #define _cfg_policy_I32(_name) _cfg_policy(INT32, _name)
 186 #define _cfg_policy_ARRAY_CB(_name) _cfg_policy(ARRAY, _name)
 187 #define _cfg_policy_STRING_CB(_name) _cfg_policy(STRING, _name)
 188 #define _cfg(_type, _name) _cfg_policy_##_type(_name)
 189         __config_items,
 190 #undef _cfg
 191 };
 192
 193 static const struct cfg_item config_data[__CFG_MAX] = {
 194 #define _cfg_data_BOOL(_name) .ptr.BOOL = &config._name
 195 #define _cfg_data_U32(_name) .ptr.U32 = &config._name
 196 #define _cfg_data_I32(_name) .ptr.I32 = &config._name
 197 #define _cfg_data_ARRAY_CB(_name) .ptr.CB = { .set = config_set_##_name, .get = config_get_##_name }
 198 #define _cfg_data_STRING_CB(_name) .ptr.CB = { .set = config_set_##_name, .get = config_get_##_name }
 199 #define _cfg(_type, _name) [CFG_##_name] = { .type = CFG_##_type, _cfg_data_##_type(_name) }
 200         __config_items,
 201 #undef _cfg
 202 };
 203
 204 static int
 205 usteer_ubus_get_config(struct ubus_context *ctx, struct ubus_object *obj,
 206                       struct ubus_request_data *req, const char *method,
 207                       struct blob_attr *msg)
 208 {
 209         int i;
 210
 211         blob_buf_init(&b, 0);
 212         for (i = 0; i < __CFG_MAX; i++) {
 213                 switch(config_data[i].type) {
 214                 case CFG_BOOL:
 215                         blobmsg_add_u8(&b, config_policy[i].name,
 216                                         *config_data[i].ptr.BOOL);
 217                         break;
 218                 case CFG_I32:
 219                 case CFG_U32:
 220                         blobmsg_add_u32(&b, config_policy[i].name,
 221                                         *config_data[i].ptr.U32);
 222                         break;
 223                 case CFG_ARRAY_CB:
 224                 case CFG_STRING_CB:
 225                         config_data[i].ptr.CB.get(&b);
 226                         break;
 227                 }
 228         }
 229         ubus_send_reply(ctx, req, b.head);
 230         return 0;
 231 }
 232
 233 static int
 234 usteer_ubus_set_config(struct ubus_context *ctx, struct ubus_object *obj,
 235                       struct ubus_request_data *req, const char *method,
 236                       struct blob_attr *msg)
 237 {
 238         struct blob_attr *tb[__CFG_MAX];
 239         int i;
 240
 241         if (!strcmp(method, "set_config"))
 242                 usteer_init_defaults();
 243
 244         blobmsg_parse(config_policy, __CFG_MAX, tb, blob_data(msg), blob_len(msg));
 245         for (i = 0; i < __CFG_MAX; i++) {
 246                 switch(config_data[i].type) {
 247                 case CFG_BOOL:
 248                         if (!tb[i])
 249                                 continue;
 250
 251                         *config_data[i].ptr.BOOL = blobmsg_get_u8(tb[i]);
 252                         break;
 253                 case CFG_I32:
 254                 case CFG_U32:
 255                         if (!tb[i])
 256                                 continue;
 257
 258                         *config_data[i].ptr.U32 = blobmsg_get_u32(tb[i]);
 259                         break;
 260                 case CFG_ARRAY_CB:
 261                 case CFG_STRING_CB:
 262                         config_data[i].ptr.CB.set(tb[i]);
 263                         break;
 264                 }
 265         }
 266
 267         return 0;
 268 }
 269
 270 static void
 271 usteer_dump_node(struct usteer_node *node)
 272 {
 273         void *c;
 274
 275         c = blobmsg_open_table(&b, usteer_node_name(node));
 276         blobmsg_add_u32(&b, "freq", node->freq);
 277         blobmsg_add_u32(&b, "n_assoc", node->n_assoc);
 278         blobmsg_add_u32(&b, "noise", node->noise);
 279         blobmsg_add_u32(&b, "load", node->load);
 280         blobmsg_add_u32(&b, "max_assoc", node->max_assoc);
 281         if (node->rrm_nr)
 282                 blobmsg_add_field(&b, BLOBMSG_TYPE_ARRAY, "rrm_nr",
 283                                   blobmsg_data(node->rrm_nr),
 284                                   blobmsg_data_len(node->rrm_nr));
 285         if (node->node_info)
 286                 blobmsg_add_field(&b, BLOBMSG_TYPE_TABLE, "node_info",
 287                                   blob_data(node->node_info),
 288                                   blob_len(node->node_info));
 289
 290         blobmsg_close_table(&b, c);
 291 }
 292
 293 static int
 294 usteer_ubus_local_info(struct ubus_context *ctx, struct ubus_object *obj,
 295                       struct ubus_request_data *req, const char *method,
 296                       struct blob_attr *msg)
 297 {
 298         struct usteer_node *node;
 299
 300         blob_buf_init(&b, 0);
 301
 302         for_each_local_node(node)
 303                 usteer_dump_node(node);
 304
 305         ubus_send_reply(ctx, req, b.head);
 306
 307         return 0;
 308 }
 309
 310 static int
 311 usteer_ubus_remote_hosts(struct ubus_context *ctx, struct ubus_object *obj,
 312                          struct ubus_request_data *req, const char *method,
 313                          struct blob_attr *msg)
 314 {
 315         struct usteer_remote_host *host;
 316         void *c;
 317
 318         blob_buf_init(&b, 0);
 319
 320         avl_for_each_element(&remote_hosts, host, avl) {
 321                 c = blobmsg_open_table(&b, host->addr);
 322                 blobmsg_add_u32(&b, "id", (uint32_t)(uintptr_t)host->avl.key);
 323                 if (host->host_info)
 324                         blobmsg_add_field(&b, BLOBMSG_TYPE_TABLE, "host_info",
 325                                           blobmsg_data(host->host_info),
 326                                           blobmsg_len(host->host_info));
 327                 blobmsg_close_table(&b, c);
 328         }
 329
 330         ubus_send_reply(ctx, req, b.head);
 331
 332         return 0;
 333 }
 334
 335 static int
 336 usteer_ubus_remote_info(struct ubus_context *ctx, struct ubus_object *obj,
 337                        struct ubus_request_data *req, const char *method,
 338                        struct blob_attr *msg)
 339 {
 340         struct usteer_remote_node *rn;
 341
 342         blob_buf_init(&b, 0);
 343
 344         for_each_remote_node(rn)
 345                 usteer_dump_node(&rn->node);
 346
 347         ubus_send_reply(ctx, req, b.head);
 348
 349         return 0;
 350 }
 351
 352 enum {
 353         NODE_DATA_NODE,
 354         NODE_DATA_VALUES,
 355         __NODE_DATA_MAX,
 356 };
 357
 358 static const struct blobmsg_policy set_node_data_policy[] = {
 359         [NODE_DATA_NODE] = { "node", BLOBMSG_TYPE_STRING },
 360         [NODE_DATA_VALUES] = { "data", BLOBMSG_TYPE_TABLE },
 361 };
 362
 363 static const struct blobmsg_policy del_node_data_policy[] = {
 364         [NODE_DATA_NODE] = { "node", BLOBMSG_TYPE_STRING },
 365         [NODE_DATA_VALUES] = { "names", BLOBMSG_TYPE_ARRAY },
 366 };
 367
 368 static void
 369 usteer_update_kvlist_data(struct kvlist *kv, struct blob_attr *data,
 370                           bool delete)
 371 {
 372         struct blob_attr *cur;
 373         int rem;
 374
 375         blobmsg_for_each_attr(cur, data, rem) {
 376                 if (delete)
 377                         kvlist_delete(kv, blobmsg_get_string(cur));
 378                 else
 379                         kvlist_set(kv, blobmsg_name(cur), cur);
 380         }
 381 }
 382
 383 static void
 384 usteer_update_kvlist_blob(struct blob_attr **dest, struct kvlist *kv)
 385 {
 386         struct blob_attr *val;
 387         const char *name;
 388
 389         blob_buf_init(&b, 0);
 390         kvlist_for_each(kv, name, val)
 391                 blobmsg_add_field(&b, blobmsg_type(val), name,
 392                                   blobmsg_data(val), blobmsg_len(val));
 393
 394         val = b.head;
 395         if (!blobmsg_len(val))
 396                 val = NULL;
 397
 398         usteer_node_set_blob(dest, val);
 399 }
 400
 401 static int
 402 usteer_ubus_update_node_data(struct ubus_context *ctx, struct ubus_object *obj,
 403                              struct ubus_request_data *req, const char *method,
 404                              struct blob_attr *msg)
 405 {
 406         const struct blobmsg_policy *policy;
 407         struct blob_attr *tb[__NODE_DATA_MAX];
 408         struct usteer_local_node *ln;
 409         struct blob_attr *val;
 410         const char *name;
 411         bool delete;
 412
 413         delete = !strncmp(method, "del", 3);
 414         policy = delete ? del_node_data_policy : set_node_data_policy;
 415
 416         blobmsg_parse(policy, __NODE_DATA_MAX, tb, blob_data(msg), blob_len(msg));
 417         if (!tb[NODE_DATA_NODE] || !tb[NODE_DATA_VALUES])
 418                 return UBUS_STATUS_INVALID_ARGUMENT;
 419
 420         name = blobmsg_get_string(tb[NODE_DATA_NODE]);
 421         val = tb[NODE_DATA_VALUES];
 422         if (delete && blobmsg_check_array(val, BLOBMSG_TYPE_STRING) < 0)
 423                 return UBUS_STATUS_INVALID_ARGUMENT;
 424
 425         if (strcmp(name, "*") != 0) {
 426                 ln = avl_find_element(&local_nodes, name, ln, node.avl);
 427                 if (!ln)
 428                         return UBUS_STATUS_NOT_FOUND;
 429
 430                 usteer_update_kvlist_data(&ln->node_info, val, delete);
 431                 usteer_update_kvlist_blob(&ln->node.node_info, &ln->node_info);
 432
 433                 return 0;
 434         }
 435
 436         usteer_update_kvlist_data(&host_info, val, delete);
 437         usteer_update_kvlist_blob(&host_info_blob, &host_info);
 438
 439         return 0;
 440 }
 441
 442 static const struct ubus_method usteer_methods[] = {
 443         UBUS_METHOD_NOARG("local_info", usteer_ubus_local_info),
 444         UBUS_METHOD_NOARG("remote_hosts", usteer_ubus_remote_hosts),
 445         UBUS_METHOD_NOARG("remote_info", usteer_ubus_remote_info),
 446         UBUS_METHOD_NOARG("get_clients", usteer_ubus_get_clients),
 447         UBUS_METHOD("get_client_info", usteer_ubus_get_client_info, client_arg),
 448         UBUS_METHOD_NOARG("get_config", usteer_ubus_get_config),
 449         UBUS_METHOD("set_config", usteer_ubus_set_config, config_policy),
 450         UBUS_METHOD("update_config", usteer_ubus_set_config, config_policy),
 451         UBUS_METHOD("set_node_data", usteer_ubus_update_node_data, set_node_data_policy),
 452         UBUS_METHOD("delete_node_data", usteer_ubus_update_node_data, del_node_data_policy),
 453 };
 454
 455 static struct ubus_object_type usteer_obj_type =
 456         UBUS_OBJECT_TYPE("usteer", usteer_methods);
 457
 458 struct ubus_object usteer_obj = {
 459         .name = "usteer",
 460         .type = &usteer_obj_type,
 461         .methods = usteer_methods,
 462         .n_methods = ARRAY_SIZE(usteer_methods),
 463 };
 464
 465 static void
 466 usteer_add_nr_entry(struct usteer_node *ln, struct usteer_node *node)
 467 {
 468         struct blobmsg_policy policy[3] = {
 469                 { .type = BLOBMSG_TYPE_STRING },
 470                 { .type = BLOBMSG_TYPE_STRING },
 471                 { .type = BLOBMSG_TYPE_STRING },
 472         };
 473         struct blob_attr *tb[3];
 474
 475         if (!node->rrm_nr)
 476                 return;
 477
 478         if (strcmp(ln->ssid, node->ssid) != 0)
 479                 return;
 480
 481         blobmsg_parse_array(policy, ARRAY_SIZE(tb), tb,
 482                             blobmsg_data(node->rrm_nr),
 483                             blobmsg_data_len(node->rrm_nr));
 484         if (!tb[2])
 485                 return;
 486
 487         blobmsg_add_field(&b, BLOBMSG_TYPE_STRING, "",
 488                           blobmsg_data(tb[2]),
 489                           blobmsg_data_len(tb[2]));
 490 }
 491
 492 int usteer_ubus_notify_client_disassoc(struct sta_info *si)
 493 {
 494         struct usteer_local_node *ln = container_of(si->node, struct usteer_local_node, node);
 495         struct usteer_remote_node *rn;
 496         struct usteer_node *node;
 497         void *c;
 498
 499         blob_buf_init(&b, 0);
 500         blobmsg_printf(&b, "addr", MAC_ADDR_FMT, MAC_ADDR_DATA(si->sta->addr));
 501         blobmsg_add_u32(&b, "duration", config.roam_kick_delay);
 502         c = blobmsg_open_array(&b, "neighbors");
 503         for_each_local_node(node)
 504                 usteer_add_nr_entry(si->node, node);
 505         for_each_remote_node(rn)
 506                 usteer_add_nr_entry(si->node, &rn->node);
 507         blobmsg_close_array(&b, c);
 508         return ubus_invoke(ubus_ctx, ln->obj_id, "wnm_disassoc_imminent", b.head, NULL, 0, 100);
 509 }
 510
 511 int usteer_ubus_trigger_client_scan(struct sta_info *si)
 512 {
 513         struct usteer_local_node *ln = container_of(si->node, struct usteer_local_node, node);
 514
 515         si->scan_band = !si->scan_band;
 516
 517         blob_buf_init(&b, 0);
 518         blobmsg_printf(&b, "addr", MAC_ADDR_FMT, MAC_ADDR_DATA(si->sta->addr));
 519         blobmsg_add_u32(&b, "mode", 1);
 520         blobmsg_add_u32(&b, "duration", 65535);
 521         blobmsg_add_u32(&b, "channel", 255);
 522         blobmsg_add_u32(&b, "op_class", si->scan_band ? 1 : 12);
 523         return ubus_invoke(ubus_ctx, ln->obj_id, "rrm_beacon_req", b.head, NULL, 0, 100);
 524 }
 525
 526 void usteer_ubus_kick_client(struct sta_info *si)
 527 {
 528         struct usteer_local_node *ln = container_of(si->node, struct usteer_local_node, node);
 529
 530         blob_buf_init(&b, 0);
 531         blobmsg_printf(&b, "addr", MAC_ADDR_FMT, MAC_ADDR_DATA(si->sta->addr));
 532         blobmsg_add_u32(&b, "reason", config.load_kick_reason_code);
 533         blobmsg_add_u8(&b, "deauth", 1);
 534         ubus_invoke(ubus_ctx, ln->obj_id, "del_client", b.head, NULL, 0, 100);
 535         si->connected = 0;
 536         si->roam_kick = current_time;
 537 }
 538
 539 void usteer_ubus_init(struct ubus_context *ctx)
 540 {
 541         ubus_add_object(ctx, &usteer_obj);
 542 }