cli.c

   1 /*
   2  * Copyright (C) 2011 Felix Fietkau <nbd@openwrt.org>
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU Lesser General Public License version 2.1
   6  * as published by the Free Software Foundation
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  */
  13
  14 #include <unistd.h>
  15
  16 #include <libubox/blobmsg_json.h>
  17 #include "libubus.h"
  18
  19 static struct blob_buf b;
  20 static int timeout = 30;
  21 static bool simple_output = false;
  22 static int verbose = 0;
  23 static int monitor_dir = -1;
  24 static uint32_t monitor_mask;
  25 static const char * const monitor_types[] = {
  26         [UBUS_MSG_HELLO] = "hello",
  27         [UBUS_MSG_STATUS] = "status",
  28         [UBUS_MSG_DATA] = "data",
  29         [UBUS_MSG_PING] = "ping",
  30         [UBUS_MSG_LOOKUP] = "lookup",
  31         [UBUS_MSG_INVOKE] = "invoke",
  32         [UBUS_MSG_ADD_OBJECT] = "add_object",
  33         [UBUS_MSG_REMOVE_OBJECT] = "remove_object",
  34         [UBUS_MSG_SUBSCRIBE] = "subscribe",
  35         [UBUS_MSG_UNSUBSCRIBE] = "unsubscribe",
  36         [UBUS_MSG_NOTIFY] = "notify",
  37 };
  38
  39 static const char *format_type(void *priv, struct blob_attr *attr)
  40 {
  41         static const char * const attr_types[] = {
  42                 [BLOBMSG_TYPE_INT8] = "\"Boolean\"",
  43                 [BLOBMSG_TYPE_INT32] = "\"Integer\"",
  44                 [BLOBMSG_TYPE_STRING] = "\"String\"",
  45                 [BLOBMSG_TYPE_ARRAY] = "\"Array\"",
  46                 [BLOBMSG_TYPE_TABLE] = "\"Table\"",
  47         };
  48         const char *type = NULL;
  49         int typeid;
  50
  51         if (blob_id(attr) != BLOBMSG_TYPE_INT32)
  52                 return NULL;
  53
  54         typeid = blobmsg_get_u32(attr);
  55         if (typeid < ARRAY_SIZE(attr_types))
  56                 type = attr_types[typeid];
  57         if (!type)
  58                 type = "\"(unknown)\"";
  59
  60         return type;
  61 }
  62
  63 static void receive_list_result(struct ubus_context *ctx, struct ubus_object_data *obj, void *priv)
  64 {
  65         struct blob_attr *cur;
  66         char *s;
  67         int rem;
  68
  69         if (simple_output || !verbose) {
  70                 printf("%s\n", obj->path);
  71                 return;
  72         }
  73
  74         printf("'%s' @%08x\n", obj->path, obj->id);
  75
  76         if (!obj->signature)
  77                 return;
  78
  79         blob_for_each_attr(cur, obj->signature, rem) {
  80                 s = blobmsg_format_json_with_cb(cur, false, format_type, NULL, -1);
  81                 printf("\t%s\n", s);
  82                 free(s);
  83         }
  84 }
  85
  86 static void receive_call_result_data(struct ubus_request *req, int type, struct blob_attr *msg)
  87 {
  88         char *str;
  89         if (!msg)
  90                 return;
  91
  92         str = blobmsg_format_json_indent(msg, true, simple_output ? -1 : 0);
  93         printf("%s\n", str);
  94         free(str);
  95 }
  96
  97 static void receive_event(struct ubus_context *ctx, struct ubus_event_handler *ev,
  98                           const char *type, struct blob_attr *msg)
  99 {
 100         char *str;
 101
 102         str = blobmsg_format_json(msg, true);
 103         printf("{ \"%s\": %s }\n", type, str);
 104         fflush(stdout);
 105         free(str);
 106 }
 107
 108 static int ubus_cli_list(struct ubus_context *ctx, int argc, char **argv)
 109 {
 110         const char *path = NULL;
 111
 112         if (argc > 1)
 113                 return -2;
 114
 115         if (argc == 1)
 116                 path = argv[0];
 117
 118         return ubus_lookup(ctx, path, receive_list_result, NULL);
 119 }
 120
 121 static int ubus_cli_call(struct ubus_context *ctx, int argc, char **argv)
 122 {
 123         uint32_t id;
 124         int ret;
 125
 126         if (argc < 2 || argc > 3)
 127                 return -2;
 128
 129         blob_buf_init(&b, 0);
 130         if (argc == 3 && !blobmsg_add_json_from_string(&b, argv[2])) {
 131                 if (!simple_output)
 132                         fprintf(stderr, "Failed to parse message data\n");
 133                 return -1;
 134         }
 135
 136         ret = ubus_lookup_id(ctx, argv[0], &id);
 137         if (ret)
 138                 return ret;
 139
 140         return ubus_invoke(ctx, id, argv[1], b.head, receive_call_result_data, NULL, timeout * 1000);
 141 }
 142
 143 static int ubus_cli_listen(struct ubus_context *ctx, int argc, char **argv)
 144 {
 145         static struct ubus_event_handler listener;
 146         const char *event;
 147         int ret = 0;
 148
 149         memset(&listener, 0, sizeof(listener));
 150         listener.cb = receive_event;
 151
 152         if (argc > 0) {
 153                 event = argv[0];
 154         } else {
 155                 event = "*";
 156                 argc = 1;
 157         }
 158
 159         do {
 160                 ret = ubus_register_event_handler(ctx, &listener, event);
 161                 if (ret)
 162                         break;
 163
 164                 argv++;
 165                 argc--;
 166                 if (argc <= 0)
 167                         break;
 168
 169                 event = argv[0];
 170         } while (1);
 171
 172         if (ret) {
 173                 if (!simple_output)
 174                         fprintf(stderr, "Error while registering for event '%s': %s\n",
 175                                 event, ubus_strerror(ret));
 176                 return -1;
 177         }
 178
 179         uloop_init();
 180         ubus_add_uloop(ctx);
 181         uloop_run();
 182         uloop_done();
 183
 184         return 0;
 185 }
 186
 187 static int ubus_cli_send(struct ubus_context *ctx, int argc, char **argv)
 188 {
 189         if (argc < 1 || argc > 2)
 190                 return -2;
 191
 192         blob_buf_init(&b, 0);
 193
 194         if (argc == 2 && !blobmsg_add_json_from_string(&b, argv[1])) {
 195                 if (!simple_output)
 196                         fprintf(stderr, "Failed to parse message data\n");
 197                 return -1;
 198         }
 199
 200         return ubus_send_event(ctx, argv[0], b.head);
 201 }
 202
 203 struct cli_wait_data {
 204         struct uloop_timeout timeout;
 205         struct ubus_event_handler ev;
 206         char **pending;
 207         int n_pending;
 208 };
 209
 210 static void wait_check_object(struct cli_wait_data *data, const char *path)
 211 {
 212         int i;
 213
 214         for (i = 0; i < data->n_pending; i++) {
 215                 if (strcmp(path, data->pending[i]) != 0)
 216                         continue;
 217
 218                 data->n_pending--;
 219                 if (i == data->n_pending)
 220                         break;
 221
 222                 memmove(&data->pending[i], &data->pending[i + 1],
 223                         (data->n_pending - i) * sizeof(*data->pending));
 224                 i--;
 225         }
 226
 227         if (!data->n_pending)
 228                 uloop_end();
 229 }
 230
 231 static void wait_event_cb(struct ubus_context *ctx, struct ubus_event_handler *ev,
 232                           const char *type, struct blob_attr *msg)
 233 {
 234         static const struct blobmsg_policy policy = {
 235                 "path", BLOBMSG_TYPE_STRING
 236         };
 237         struct cli_wait_data *data = container_of(ev, struct cli_wait_data, ev);
 238         struct blob_attr *attr;
 239         const char *path;
 240
 241         if (strcmp(type, "ubus.object.add") != 0)
 242                 return;
 243
 244         blobmsg_parse(&policy, 1, &attr, blob_data(msg), blob_len(msg));
 245         if (!attr)
 246                 return;
 247
 248         path = blobmsg_data(attr);
 249         wait_check_object(data, path);
 250 }
 251
 252 static void wait_list_cb(struct ubus_context *ctx, struct ubus_object_data *obj, void *priv)
 253 {
 254         struct cli_wait_data *data = priv;
 255
 256         wait_check_object(data, obj->path);
 257 }
 258
 259
 260 static void wait_timeout(struct uloop_timeout *timeout)
 261 {
 262         uloop_end();
 263 }
 264
 265 static int ubus_cli_wait_for(struct ubus_context *ctx, int argc, char **argv)
 266 {
 267         struct cli_wait_data data = {
 268                 .timeout.cb = wait_timeout,
 269                 .ev.cb = wait_event_cb,
 270                 .pending = argv,
 271                 .n_pending = argc,
 272         };
 273         int ret;
 274
 275         if (argc < 1)
 276                 return -2;
 277
 278         uloop_init();
 279         ubus_add_uloop(ctx);
 280
 281         ret = ubus_lookup(ctx, NULL, wait_list_cb, &data);
 282         if (ret)
 283                 return ret;
 284
 285         if (!data.n_pending)
 286                 return ret;
 287
 288         ret = ubus_register_event_handler(ctx, &data.ev, "ubus.object.add");
 289         if (ret)
 290                 return ret;
 291
 292         uloop_timeout_set(&data.timeout, timeout * 1000);
 293         uloop_run();
 294         uloop_done();
 295
 296         if (data.n_pending)
 297                 return UBUS_STATUS_TIMEOUT;
 298
 299         return ret;
 300 }
 301
 302 static const char *
 303 ubus_cli_msg_type(uint32_t type)
 304 {
 305         const char *ret = NULL;
 306         static char unk_type[16];
 307
 308
 309         if (type < ARRAY_SIZE(monitor_types))
 310                 ret = monitor_types[type];
 311
 312         if (!ret) {
 313                 snprintf(unk_type, sizeof(unk_type), "%d", type);
 314                 ret = unk_type;
 315         }
 316
 317         return ret;
 318 }
 319
 320 static char *
 321 ubus_cli_get_monitor_data(struct blob_attr *data)
 322 {
 323         static const struct blob_attr_info policy[UBUS_ATTR_MAX] = {
 324                 [UBUS_ATTR_STATUS] = { .type = BLOB_ATTR_INT32 },
 325                 [UBUS_ATTR_OBJPATH] = { .type = BLOB_ATTR_STRING },
 326                 [UBUS_ATTR_OBJID] = { .type = BLOB_ATTR_INT32 },
 327                 [UBUS_ATTR_METHOD] = { .type = BLOB_ATTR_STRING },
 328                 [UBUS_ATTR_OBJTYPE] = { .type = BLOB_ATTR_INT32 },
 329                 [UBUS_ATTR_SIGNATURE] = { .type = BLOB_ATTR_NESTED },
 330                 [UBUS_ATTR_DATA] = { .type = BLOB_ATTR_NESTED },
 331                 [UBUS_ATTR_ACTIVE] = { .type = BLOB_ATTR_INT8 },
 332                 [UBUS_ATTR_NO_REPLY] = { .type = BLOB_ATTR_INT8 },
 333                 [UBUS_ATTR_USER] = { .type = BLOB_ATTR_STRING },
 334                 [UBUS_ATTR_GROUP] = { .type = BLOB_ATTR_STRING },
 335         };
 336         static const char * const names[UBUS_ATTR_MAX] = {
 337                 [UBUS_ATTR_STATUS] = "status",
 338                 [UBUS_ATTR_OBJPATH] = "objpath",
 339                 [UBUS_ATTR_OBJID] = "objid",
 340                 [UBUS_ATTR_METHOD] = "method",
 341                 [UBUS_ATTR_OBJTYPE] = "objtype",
 342                 [UBUS_ATTR_SIGNATURE] = "signature",
 343                 [UBUS_ATTR_DATA] = "data",
 344                 [UBUS_ATTR_ACTIVE] = "active",
 345                 [UBUS_ATTR_NO_REPLY] = "no_reply",
 346                 [UBUS_ATTR_USER] = "user",
 347                 [UBUS_ATTR_GROUP] = "group",
 348         };
 349         struct blob_attr *tb[UBUS_ATTR_MAX];
 350         int i;
 351
 352         blob_buf_init(&b, 0);
 353         blob_parse(data, tb, policy, UBUS_ATTR_MAX);
 354
 355         for (i = 0; i < UBUS_ATTR_MAX; i++) {
 356                 const char *n = names[i];
 357                 struct blob_attr *v = tb[i];
 358
 359                 if (!tb[i] || !n)
 360                         continue;
 361
 362                 switch(policy[i].type) {
 363                 case BLOB_ATTR_INT32:
 364                         blobmsg_add_u32(&b, n, blob_get_int32(v));
 365                         break;
 366                 case BLOB_ATTR_STRING:
 367                         blobmsg_add_string(&b, n, blob_data(v));
 368                         break;
 369                 case BLOB_ATTR_INT8:
 370                         blobmsg_add_u8(&b, n, !!blob_get_int8(v));
 371                         break;
 372                 case BLOB_ATTR_NESTED:
 373                         blobmsg_add_field(&b, BLOBMSG_TYPE_TABLE, n, blobmsg_data(v), blobmsg_data_len(v));
 374                         break;
 375                 }
 376         }
 377
 378         return blobmsg_format_json(b.head, true);
 379 }
 380
 381 static void
 382 ubus_cli_monitor_cb(struct ubus_context *ctx, uint32_t seq, struct blob_attr *msg)
 383 {
 384         static const struct blob_attr_info policy[UBUS_MONITOR_MAX] = {
 385                 [UBUS_MONITOR_CLIENT] = { .type = BLOB_ATTR_INT32 },
 386                 [UBUS_MONITOR_PEER] = { .type = BLOB_ATTR_INT32 },
 387                 [UBUS_MONITOR_SEND] = { .type = BLOB_ATTR_INT8 },
 388                 [UBUS_MONITOR_TYPE] = { .type = BLOB_ATTR_INT32 },
 389                 [UBUS_MONITOR_DATA] = { .type = BLOB_ATTR_NESTED },
 390         };
 391         struct blob_attr *tb[UBUS_MONITOR_MAX];
 392         uint32_t client, peer, type;
 393         bool send;
 394         char *data;
 395
 396         blob_parse(msg, tb, policy, UBUS_MONITOR_MAX);
 397
 398         if (!tb[UBUS_MONITOR_CLIENT] ||
 399             !tb[UBUS_MONITOR_PEER] ||
 400             !tb[UBUS_MONITOR_SEND] ||
 401             !tb[UBUS_MONITOR_TYPE] ||
 402             !tb[UBUS_MONITOR_DATA]) {
 403                 printf("Invalid monitor msg\n");
 404                 return;
 405         }
 406
 407         send = blob_get_int32(tb[UBUS_MONITOR_SEND]);
 408         client = blob_get_int32(tb[UBUS_MONITOR_CLIENT]);
 409         peer = blob_get_int32(tb[UBUS_MONITOR_PEER]);
 410         type = blob_get_int32(tb[UBUS_MONITOR_TYPE]);
 411
 412         if (monitor_mask && type < 32 && !(monitor_mask & (1 << type)))
 413                 return;
 414
 415         if (monitor_dir >= 0 && send != monitor_dir)
 416                 return;
 417
 418         data = ubus_cli_get_monitor_data(tb[UBUS_MONITOR_DATA]);
 419         printf("%s %08x #%08x %14s: %s\n", send ? "->" : "<-", client, peer, ubus_cli_msg_type(type), data);
 420         free(data);
 421         fflush(stdout);
 422 }
 423
 424 static int ubus_cli_monitor(struct ubus_context *ctx, int argc, char **argv)
 425 {
 426         int ret;
 427
 428         uloop_init();
 429         ubus_add_uloop(ctx);
 430         ctx->monitor_cb = ubus_cli_monitor_cb;
 431         ret = ubus_monitor_start(ctx);
 432         if (ret)
 433                 return ret;
 434
 435         uloop_run();
 436         uloop_done();
 437
 438         ubus_monitor_stop(ctx);
 439         return 0;
 440 }
 441
 442 static int add_monitor_type(const char *type)
 443 {
 444         int i;
 445
 446         for (i = 0; i < ARRAY_SIZE(monitor_types); i++) {
 447                 if (!monitor_types[i] || strcmp(monitor_types[i], type) != 0)
 448                         continue;
 449
 450                 monitor_mask |= 1 << i;
 451                 return 0;
 452         }
 453
 454         return -1;
 455 }
 456
 457 static int usage(const char *prog)
 458 {
 459         fprintf(stderr,
 460                 "Usage: %s [<options>] <command> [arguments...]\n"
 461                 "Options:\n"
 462                 " -s <socket>:          Set the unix domain socket to connect to\n"
 463                 " -t <timeout>:         Set the timeout (in seconds) for a command to complete\n"
 464                 " -S:                   Use simplified output (for scripts)\n"
 465                 " -v:                   More verbose output\n"
 466                 " -m <type>:            (for monitor): include a specific message type\n"
 467                 "                       (can be used more than once)\n"
 468                 " -M <r|t>              (for monitor): only capture received or transmitted traffic\n"
 469                 "\n"
 470                 "Commands:\n"
 471                 " - list [<path>]                       List objects\n"
 472                 " - call <path> <method> [<message>]    Call an object method\n"
 473                 " - listen [<path>...]                  Listen for events\n"
 474                 " - send <type> [<message>]             Send an event\n"
 475                 " - wait_for <object> [<object>...]     Wait for multiple objects to appear on ubus\n"
 476                 " - monitor                             Monitor ubus traffic\n"
 477                 "\n", prog);
 478         return 1;
 479 }
 480
 481
 482 struct {
 483         const char *name;
 484         int (*cb)(struct ubus_context *ctx, int argc, char **argv);
 485 } commands[] = {
 486         { "list", ubus_cli_list },
 487         { "call", ubus_cli_call },
 488         { "listen", ubus_cli_listen },
 489         { "send", ubus_cli_send },
 490         { "wait_for", ubus_cli_wait_for },
 491         { "monitor", ubus_cli_monitor },
 492 };
 493
 494 int main(int argc, char **argv)
 495 {
 496         const char *progname, *ubus_socket = NULL;
 497         static struct ubus_context *ctx;
 498         char *cmd;
 499         int ret = 0;
 500         int i, ch;
 501
 502         progname = argv[0];
 503
 504         while ((ch = getopt(argc, argv, "m:M:vs:t:S")) != -1) {
 505                 switch (ch) {
 506                 case 's':
 507                         ubus_socket = optarg;
 508                         break;
 509                 case 't':
 510                         timeout = atoi(optarg);
 511                         break;
 512                 case 'S':
 513                         simple_output = true;
 514                         break;
 515                 case 'v':
 516                         verbose++;
 517                         break;
 518                 case 'm':
 519                         if (add_monitor_type(optarg))
 520                             return usage(progname);
 521                         break;
 522                 case 'M':
 523                         switch (optarg[0]) {
 524                         case 'r':
 525                                 monitor_dir = 0;
 526                                 break;
 527                         case 't':
 528                                 monitor_dir = 1;
 529                                 break;
 530                         default:
 531                                 return usage(progname);
 532                         }
 533                         break;
 534                 default:
 535                         return usage(progname);
 536                 }
 537         }
 538
 539         argc -= optind;
 540         argv += optind;
 541
 542         cmd = argv[0];
 543         if (argc < 1)
 544                 return usage(progname);
 545
 546         ctx = ubus_connect(ubus_socket);
 547         if (!ctx) {
 548                 if (!simple_output)
 549                         fprintf(stderr, "Failed to connect to ubus\n");
 550                 return -1;
 551         }
 552
 553         argv++;
 554         argc--;
 555
 556         ret = -2;
 557         for (i = 0; i < ARRAY_SIZE(commands); i++) {
 558                 if (strcmp(commands[i].name, cmd) != 0)
 559                         continue;
 560
 561                 ret = commands[i].cb(ctx, argc, argv);
 562                 break;
 563         }
 564
 565         if (ret > 0 && !simple_output)
 566                 fprintf(stderr, "Command failed: %s\n", ubus_strerror(ret));
 567         else if (ret == -2)
 568                 usage(progname);
 569
 570         ubus_free(ctx);
 571         return ret;
 572 }