ubus.c

   1 /*
   2  * uhttpd - Tiny single-threaded httpd
   3  *
   4  *   Copyright (C) 2010-2013 Jo-Philipp Wich <xm@subsignal.org>
   5  *   Copyright (C) 2013 Felix Fietkau <nbd@openwrt.org>
   6  *
   7  * Permission to use, copy, modify, and/or distribute this software for any
   8  * purpose with or without fee is hereby granted, provided that the above
   9  * copyright notice and this permission notice appear in all copies.
  10  *
  11  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  12  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  13  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  14  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  15  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  16  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  17  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  18  */
  19
  20 #include <libubox/blobmsg.h>
  21 #include <libubox/blobmsg_json.h>
  22 #include <libubox/avl.h>
  23 #include <libubox/avl-cmp.h>
  24 #include <stdio.h>
  25 #include <poll.h>
  26
  27 #include "uhttpd.h"
  28 #include "plugin.h"
  29
  30 static const struct uhttpd_ops *ops;
  31 static struct config *_conf;
  32 #define conf (*_conf)
  33
  34 static struct ubus_context *ctx;
  35 static struct blob_buf buf;
  36
  37 #define UH_UBUS_MAX_POST_SIZE   65536
  38 #define UH_UBUS_DEFAULT_SID     "00000000000000000000000000000000"
  39
  40 enum {
  41         RPC_JSONRPC,
  42         RPC_METHOD,
  43         RPC_PARAMS,
  44         RPC_ID,
  45         __RPC_MAX,
  46 };
  47
  48 static const struct blobmsg_policy rpc_policy[__RPC_MAX] = {
  49         [RPC_JSONRPC] = { .name = "jsonrpc", .type = BLOBMSG_TYPE_STRING },
  50         [RPC_METHOD] = { .name = "method", .type = BLOBMSG_TYPE_STRING },
  51         [RPC_PARAMS] = { .name = "params", .type = BLOBMSG_TYPE_UNSPEC },
  52         [RPC_ID] = { .name = "id", .type = BLOBMSG_TYPE_UNSPEC },
  53 };
  54
  55 enum {
  56         SES_ACCESS,
  57         __SES_MAX,
  58 };
  59
  60 static const struct blobmsg_policy ses_policy[__SES_MAX] = {
  61         [SES_ACCESS] = { .name = "access", .type = BLOBMSG_TYPE_BOOL },
  62 };
  63
  64 struct rpc_data {
  65         struct blob_attr *id;
  66         const char *sid;
  67         const char *method;
  68         const char *object;
  69         const char *function;
  70         struct blob_attr *data;
  71         struct blob_attr *params;
  72 };
  73
  74 struct list_data {
  75         bool verbose;
  76         struct blob_buf *buf;
  77 };
  78
  79 enum rpc_error {
  80         ERROR_PARSE,
  81         ERROR_REQUEST,
  82         ERROR_METHOD,
  83         ERROR_PARAMS,
  84         ERROR_INTERNAL,
  85         ERROR_OBJECT,
  86         ERROR_SESSION,
  87         ERROR_ACCESS,
  88         ERROR_TIMEOUT,
  89         __ERROR_MAX
  90 };
  91
  92 static const struct {
  93         int code;
  94         const char *msg;
  95 } json_errors[__ERROR_MAX] = {
  96         [ERROR_PARSE] = { -32700, "Parse error" },
  97         [ERROR_REQUEST] = { -32600, "Invalid request" },
  98         [ERROR_METHOD] = { -32601, "Method not found" },
  99         [ERROR_PARAMS] = { -32602, "Invalid parameters" },
 100         [ERROR_INTERNAL] = { -32603, "Internal error" },
 101         [ERROR_OBJECT] = { -32000, "Object not found" },
 102         [ERROR_SESSION] = { -32001, "Session not found" },
 103         [ERROR_ACCESS] = { -32002, "Access denied" },
 104         [ERROR_TIMEOUT] = { -32003, "ubus request timed out" },
 105 };
 106
 107 enum cors_hdr {
 108         HDR_ORIGIN,
 109         HDR_ACCESS_CONTROL_REQUEST_METHOD,
 110         HDR_ACCESS_CONTROL_REQUEST_HEADERS,
 111         __HDR_MAX
 112 };
 113
 114 static void __uh_ubus_next_batched_request(struct uloop_timeout *timeout);
 115
 116 static void uh_ubus_next_batched_request(struct client *cl)
 117 {
 118         struct dispatch_ubus *du = &cl->dispatch.ubus;
 119
 120         du->timeout.cb = __uh_ubus_next_batched_request;
 121         uloop_timeout_set(&du->timeout, 1);
 122 }
 123
 124 static void uh_ubus_add_cors_headers(struct client *cl)
 125 {
 126         struct blob_attr *tb[__HDR_MAX];
 127         static const struct blobmsg_policy hdr_policy[__HDR_MAX] = {
 128                 [HDR_ORIGIN] = { "origin", BLOBMSG_TYPE_STRING },
 129                 [HDR_ACCESS_CONTROL_REQUEST_METHOD] = { "access-control-request-method", BLOBMSG_TYPE_STRING },
 130                 [HDR_ACCESS_CONTROL_REQUEST_HEADERS] = { "access-control-request-headers", BLOBMSG_TYPE_STRING },
 131         };
 132
 133         blobmsg_parse(hdr_policy, __HDR_MAX, tb, blob_data(cl->hdr.head), blob_len(cl->hdr.head));
 134
 135         if (!tb[HDR_ORIGIN])
 136                 return;
 137
 138         if (tb[HDR_ACCESS_CONTROL_REQUEST_METHOD])
 139         {
 140                 char *hdr = (char *) blobmsg_data(tb[HDR_ACCESS_CONTROL_REQUEST_METHOD]);
 141
 142                 if (strcmp(hdr, "POST") && strcmp(hdr, "OPTIONS"))
 143                         return;
 144         }
 145
 146         ustream_printf(cl->us, "Access-Control-Allow-Origin: %s\r\n",
 147                        blobmsg_get_string(tb[HDR_ORIGIN]));
 148
 149         if (tb[HDR_ACCESS_CONTROL_REQUEST_HEADERS])
 150                 ustream_printf(cl->us, "Access-Control-Allow-Headers: %s\r\n",
 151                                blobmsg_get_string(tb[HDR_ACCESS_CONTROL_REQUEST_HEADERS]));
 152
 153         ustream_printf(cl->us, "Access-Control-Allow-Methods: POST, OPTIONS\r\n");
 154         ustream_printf(cl->us, "Access-Control-Allow-Credentials: true\r\n");
 155 }
 156
 157 static void uh_ubus_send_header(struct client *cl)
 158 {
 159         ops->http_header(cl, 200, "OK");
 160
 161         if (conf.ubus_cors)
 162                 uh_ubus_add_cors_headers(cl);
 163
 164         ustream_printf(cl->us, "Content-Type: application/json\r\n");
 165
 166         if (cl->request.method == UH_HTTP_MSG_OPTIONS)
 167                 ustream_printf(cl->us, "Content-Length: 0\r\n");
 168
 169         ustream_printf(cl->us, "\r\n");
 170 }
 171
 172 static void uh_ubus_send_response(struct client *cl)
 173 {
 174         struct dispatch_ubus *du = &cl->dispatch.ubus;
 175         const char *sep = "";
 176         char *str;
 177
 178         if (du->array && du->array_idx > 1)
 179                 sep = ",";
 180
 181         str = blobmsg_format_json(buf.head, true);
 182         ops->chunk_printf(cl, "%s%s", sep, str);
 183         free(str);
 184
 185         du->jsobj_cur = NULL;
 186         if (du->array)
 187                 uh_ubus_next_batched_request(cl);
 188         else
 189                 return ops->request_done(cl);
 190 }
 191
 192 static void uh_ubus_init_response(struct client *cl)
 193 {
 194         struct dispatch_ubus *du = &cl->dispatch.ubus;
 195         struct json_object *obj = du->jsobj_cur, *obj2 = NULL;
 196
 197         blobmsg_add_string(&buf, "jsonrpc", "2.0");
 198
 199         if (obj)
 200                 json_object_object_get_ex(obj, "id", &obj2);
 201
 202         if (obj2)
 203                 blobmsg_add_json_element(&buf, "id", obj2);
 204         else
 205                 blobmsg_add_field(&buf, BLOBMSG_TYPE_UNSPEC, "id", NULL, 0);
 206 }
 207
 208 static void uh_ubus_json_error(struct client *cl, enum rpc_error type)
 209 {
 210         void *c;
 211
 212         uh_ubus_init_response(cl);
 213         c = blobmsg_open_table(&buf, "error");
 214         blobmsg_add_u32(&buf, "code", json_errors[type].code);
 215         blobmsg_add_string(&buf, "message", json_errors[type].msg);
 216         blobmsg_close_table(&buf, c);
 217         uh_ubus_send_response(cl);
 218 }
 219
 220 static void
 221 uh_ubus_request_data_cb(struct ubus_request *req, int type, struct blob_attr *msg)
 222 {
 223         struct dispatch_ubus *du = container_of(req, struct dispatch_ubus, req);
 224
 225         blobmsg_add_field(&du->buf, BLOBMSG_TYPE_TABLE, "", blob_data(msg), blob_len(msg));
 226 }
 227
 228 static void
 229 uh_ubus_request_cb(struct ubus_request *req, int ret)
 230 {
 231         struct dispatch_ubus *du = container_of(req, struct dispatch_ubus, req);
 232         struct client *cl = container_of(du, struct client, dispatch.ubus);
 233         struct blob_attr *cur;
 234         void *r;
 235         int rem;
 236
 237         uloop_timeout_cancel(&du->timeout);
 238         uh_ubus_init_response(cl);
 239         r = blobmsg_open_array(&buf, "result");
 240         blobmsg_add_u32(&buf, "", ret);
 241         blob_for_each_attr(cur, du->buf.head, rem)
 242                 blobmsg_add_blob(&buf, cur);
 243         blobmsg_close_array(&buf, r);
 244         uh_ubus_send_response(cl);
 245 }
 246
 247 static void
 248 uh_ubus_timeout_cb(struct uloop_timeout *timeout)
 249 {
 250         struct dispatch_ubus *du = container_of(timeout, struct dispatch_ubus, timeout);
 251         struct client *cl = container_of(du, struct client, dispatch.ubus);
 252
 253         ubus_abort_request(ctx, &du->req);
 254         uh_ubus_json_error(cl, ERROR_TIMEOUT);
 255 }
 256
 257 static void uh_ubus_close_fds(struct client *cl)
 258 {
 259         if (ctx->sock.fd < 0)
 260                 return;
 261
 262         close(ctx->sock.fd);
 263         ctx->sock.fd = -1;
 264 }
 265
 266 static void uh_ubus_request_free(struct client *cl)
 267 {
 268         struct dispatch_ubus *du = &cl->dispatch.ubus;
 269
 270         blob_buf_free(&du->buf);
 271         uloop_timeout_cancel(&du->timeout);
 272
 273         if (du->jsobj)
 274                 json_object_put(du->jsobj);
 275
 276         if (du->jstok)
 277                 json_tokener_free(du->jstok);
 278
 279         if (du->req_pending)
 280                 ubus_abort_request(ctx, &du->req);
 281 }
 282
 283 static void uh_ubus_single_error(struct client *cl, enum rpc_error type)
 284 {
 285         uh_ubus_send_header(cl);
 286         uh_ubus_json_error(cl, type);
 287         ops->request_done(cl);
 288 }
 289
 290 static void uh_ubus_send_request(struct client *cl, const char *sid, struct blob_attr *args)
 291 {
 292         struct dispatch *d = &cl->dispatch;
 293         struct dispatch_ubus *du = &d->ubus;
 294         struct blob_attr *cur;
 295         static struct blob_buf req;
 296         int ret, rem;
 297
 298         blob_buf_init(&req, 0);
 299         blobmsg_for_each_attr(cur, args, rem) {
 300                 if (!strcmp(blobmsg_name(cur), "ubus_rpc_session"))
 301                         return uh_ubus_json_error(cl, ERROR_PARAMS);
 302                 blobmsg_add_blob(&req, cur);
 303         }
 304
 305         blobmsg_add_string(&req, "ubus_rpc_session", sid);
 306
 307         blob_buf_init(&du->buf, 0);
 308         memset(&du->req, 0, sizeof(du->req));
 309         ret = ubus_invoke_async(ctx, du->obj, du->func, req.head, &du->req);
 310         if (ret)
 311                 return uh_ubus_json_error(cl, ERROR_INTERNAL);
 312
 313         du->req.data_cb = uh_ubus_request_data_cb;
 314         du->req.complete_cb = uh_ubus_request_cb;
 315         ubus_complete_request_async(ctx, &du->req);
 316
 317         du->timeout.cb = uh_ubus_timeout_cb;
 318         uloop_timeout_set(&du->timeout, conf.script_timeout * 1000);
 319
 320         du->req_pending = true;
 321 }
 322
 323 static void uh_ubus_list_cb(struct ubus_context *ctx, struct ubus_object_data *obj, void *priv)
 324 {
 325         struct blob_attr *sig, *attr;
 326         struct list_data *data = priv;
 327         int rem, rem2;
 328         void *t, *o;
 329
 330         if (!data->verbose) {
 331                 blobmsg_add_string(data->buf, NULL, obj->path);
 332                 return;
 333         }
 334
 335         if (!obj->signature)
 336                 return;
 337
 338         o = blobmsg_open_table(data->buf, obj->path);
 339         blob_for_each_attr(sig, obj->signature, rem) {
 340                 t = blobmsg_open_table(data->buf, blobmsg_name(sig));
 341                 rem2 = blobmsg_data_len(sig);
 342                 __blob_for_each_attr(attr, blobmsg_data(sig), rem2) {
 343                         if (blob_id(attr) != BLOBMSG_TYPE_INT32)
 344                                 continue;
 345
 346                         switch (blobmsg_get_u32(attr)) {
 347                         case BLOBMSG_TYPE_INT8:
 348                                 blobmsg_add_string(data->buf, blobmsg_name(attr), "boolean");
 349                                 break;
 350                         case BLOBMSG_TYPE_INT32:
 351                                 blobmsg_add_string(data->buf, blobmsg_name(attr), "number");
 352                                 break;
 353                         case BLOBMSG_TYPE_STRING:
 354                                 blobmsg_add_string(data->buf, blobmsg_name(attr), "string");
 355                                 break;
 356                         case BLOBMSG_TYPE_ARRAY:
 357                                 blobmsg_add_string(data->buf, blobmsg_name(attr), "array");
 358                                 break;
 359                         case BLOBMSG_TYPE_TABLE:
 360                                 blobmsg_add_string(data->buf, blobmsg_name(attr), "object");
 361                                 break;
 362                         default:
 363                                 blobmsg_add_string(data->buf, blobmsg_name(attr), "unknown");
 364                                 break;
 365                         }
 366                 }
 367                 blobmsg_close_table(data->buf, t);
 368         }
 369         blobmsg_close_table(data->buf, o);
 370 }
 371
 372 static void uh_ubus_send_list(struct client *cl, struct blob_attr *params)
 373 {
 374         struct blob_attr *cur, *dup;
 375         struct list_data data = { .buf = &cl->dispatch.ubus.buf, .verbose = false };
 376         void *r;
 377         int rem;
 378
 379         blob_buf_init(data.buf, 0);
 380
 381         uh_client_ref(cl);
 382
 383         if (!params || blob_id(params) != BLOBMSG_TYPE_ARRAY) {
 384                 r = blobmsg_open_array(data.buf, "result");
 385                 ubus_lookup(ctx, NULL, uh_ubus_list_cb, &data);
 386                 blobmsg_close_array(data.buf, r);
 387         }
 388         else {
 389                 r = blobmsg_open_table(data.buf, "result");
 390                 dup = blob_memdup(params);
 391                 if (dup)
 392                 {
 393                         rem = blobmsg_data_len(dup);
 394                         data.verbose = true;
 395                         __blob_for_each_attr(cur, blobmsg_data(dup), rem)
 396                                 ubus_lookup(ctx, blobmsg_data(cur), uh_ubus_list_cb, &data);
 397                         free(dup);
 398                 }
 399                 blobmsg_close_table(data.buf, r);
 400         }
 401
 402         uh_client_unref(cl);
 403
 404         uh_ubus_init_response(cl);
 405         blobmsg_add_blob(&buf, blob_data(data.buf->head));
 406         uh_ubus_send_response(cl);
 407 }
 408
 409 static bool parse_json_rpc(struct rpc_data *d, struct blob_attr *data)
 410 {
 411         struct blob_attr *tb[__RPC_MAX];
 412         struct blob_attr *cur;
 413
 414         blobmsg_parse(rpc_policy, __RPC_MAX, tb, blob_data(data), blob_len(data));
 415
 416         cur = tb[RPC_JSONRPC];
 417         if (!cur || strcmp(blobmsg_data(cur), "2.0") != 0)
 418                 return false;
 419
 420         cur = tb[RPC_METHOD];
 421         if (!cur)
 422                 return false;
 423
 424         d->id = tb[RPC_ID];
 425         d->method = blobmsg_data(cur);
 426
 427         cur = tb[RPC_PARAMS];
 428         if (!cur)
 429                 return true;
 430
 431         d->params = blob_memdup(cur);
 432         if (!d->params)
 433                 return false;
 434
 435         return true;
 436 }
 437
 438 static void parse_call_params(struct rpc_data *d)
 439 {
 440         const struct blobmsg_policy data_policy[] = {
 441                 { .type = BLOBMSG_TYPE_STRING },
 442                 { .type = BLOBMSG_TYPE_STRING },
 443                 { .type = BLOBMSG_TYPE_STRING },
 444                 { .type = BLOBMSG_TYPE_TABLE },
 445         };
 446         struct blob_attr *tb[4];
 447
 448         if (!d->params || blobmsg_type(d->params) != BLOBMSG_TYPE_ARRAY)
 449                 return;
 450
 451         blobmsg_parse_array(data_policy, ARRAY_SIZE(data_policy), tb,
 452                             blobmsg_data(d->params), blobmsg_data_len(d->params));
 453
 454         if (tb[0])
 455                 d->sid = blobmsg_data(tb[0]);
 456
 457         if (conf.ubus_noauth && (!d->sid || !*d->sid))
 458                 d->sid = UH_UBUS_DEFAULT_SID;
 459
 460         if (tb[1])
 461                 d->object = blobmsg_data(tb[1]);
 462
 463         if (tb[2])
 464                 d->function = blobmsg_data(tb[2]);
 465
 466         d->data = tb[3];
 467 }
 468
 469 static void uh_ubus_init_batch(struct client *cl)
 470 {
 471         struct dispatch_ubus *du = &cl->dispatch.ubus;
 472
 473         du->array = true;
 474         uh_ubus_send_header(cl);
 475         ops->chunk_printf(cl, "[");
 476 }
 477
 478 static void uh_ubus_complete_batch(struct client *cl)
 479 {
 480         ops->chunk_printf(cl, "]");
 481         ops->request_done(cl);
 482 }
 483
 484 static void uh_ubus_allowed_cb(struct ubus_request *req, int type, struct blob_attr *msg)
 485 {
 486         struct blob_attr *tb[__SES_MAX];
 487         bool *allow = (bool *)req->priv;
 488
 489         if (!msg)
 490                 return;
 491
 492         blobmsg_parse(ses_policy, __SES_MAX, tb, blob_data(msg), blob_len(msg));
 493
 494         if (tb[SES_ACCESS])
 495                 *allow = blobmsg_get_bool(tb[SES_ACCESS]);
 496 }
 497
 498 static bool uh_ubus_allowed(const char *sid, const char *obj, const char *fun)
 499 {
 500         uint32_t id;
 501         bool allow = false;
 502         static struct blob_buf req;
 503
 504         if (ubus_lookup_id(ctx, "session", &id))
 505                 return false;
 506
 507         blob_buf_init(&req, 0);
 508         blobmsg_add_string(&req, "ubus_rpc_session", sid);
 509         blobmsg_add_string(&req, "object", obj);
 510         blobmsg_add_string(&req, "function", fun);
 511
 512         ubus_invoke(ctx, id, "access", req.head, uh_ubus_allowed_cb, &allow, conf.script_timeout * 500);
 513
 514         return allow;
 515 }
 516
 517 static void uh_ubus_handle_request_object(struct client *cl, struct json_object *obj)
 518 {
 519         struct dispatch_ubus *du = &cl->dispatch.ubus;
 520         struct rpc_data data = {};
 521         enum rpc_error err = ERROR_PARSE;
 522         static struct blob_buf req;
 523
 524         uh_client_ref(cl);
 525
 526         if (json_object_get_type(obj) != json_type_object)
 527                 goto error;
 528
 529         du->jsobj_cur = obj;
 530         blob_buf_init(&req, 0);
 531         if (!blobmsg_add_object(&req, obj))
 532                 goto error;
 533
 534         if (!parse_json_rpc(&data, req.head))
 535                 goto error;
 536
 537         if (!strcmp(data.method, "call")) {
 538                 parse_call_params(&data);
 539
 540                 if (!data.sid || !data.object || !data.function || !data.data)
 541                         goto error;
 542
 543                 du->func = data.function;
 544                 if (ubus_lookup_id(ctx, data.object, &du->obj)) {
 545                         err = ERROR_OBJECT;
 546                         goto error;
 547                 }
 548
 549                 if (!conf.ubus_noauth && !uh_ubus_allowed(data.sid, data.object, data.function)) {
 550                         err = ERROR_ACCESS;
 551                         goto error;
 552                 }
 553
 554                 uh_ubus_send_request(cl, data.sid, data.data);
 555                 goto out;
 556         }
 557         else if (!strcmp(data.method, "list")) {
 558                 uh_ubus_send_list(cl, data.params);
 559                 goto out;
 560         }
 561         else {
 562                 err = ERROR_METHOD;
 563                 goto error;
 564         }
 565
 566 error:
 567         uh_ubus_json_error(cl, err);
 568 out:
 569         if (data.params)
 570                 free(data.params);
 571
 572         uh_client_unref(cl);
 573 }
 574
 575 static void __uh_ubus_next_batched_request(struct uloop_timeout *timeout)
 576 {
 577         struct dispatch_ubus *du = container_of(timeout, struct dispatch_ubus, timeout);
 578         struct client *cl = container_of(du, struct client, dispatch.ubus);
 579         struct json_object *obj = du->jsobj;
 580         int len;
 581
 582         len = json_object_array_length(obj);
 583         if (du->array_idx >= len)
 584                 return uh_ubus_complete_batch(cl);
 585
 586         obj = json_object_array_get_idx(obj, du->array_idx++);
 587         uh_ubus_handle_request_object(cl, obj);
 588 }
 589
 590 static void uh_ubus_data_done(struct client *cl)
 591 {
 592         struct dispatch_ubus *du = &cl->dispatch.ubus;
 593         struct json_object *obj = du->jsobj;
 594
 595         switch (obj ? json_object_get_type(obj) : json_type_null) {
 596         case json_type_object:
 597                 uh_ubus_send_header(cl);
 598                 return uh_ubus_handle_request_object(cl, obj);
 599         case json_type_array:
 600                 uh_ubus_init_batch(cl);
 601                 return uh_ubus_next_batched_request(cl);
 602         default:
 603                 return uh_ubus_single_error(cl, ERROR_PARSE);
 604         }
 605 }
 606
 607 static int uh_ubus_data_send(struct client *cl, const char *data, int len)
 608 {
 609         struct dispatch_ubus *du = &cl->dispatch.ubus;
 610
 611         if (du->jsobj || !du->jstok)
 612                 goto error;
 613
 614         du->post_len += len;
 615         if (du->post_len > UH_UBUS_MAX_POST_SIZE)
 616                 goto error;
 617
 618         du->jsobj = json_tokener_parse_ex(du->jstok, data, len);
 619         return len;
 620
 621 error:
 622         uh_ubus_single_error(cl, ERROR_PARSE);
 623         return 0;
 624 }
 625
 626 static void uh_ubus_handle_request(struct client *cl, char *url, struct path_info *pi)
 627 {
 628         struct dispatch *d = &cl->dispatch;
 629
 630         blob_buf_init(&buf, 0);
 631
 632         switch (cl->request.method)
 633         {
 634         case UH_HTTP_MSG_POST:
 635                 d->data_send = uh_ubus_data_send;
 636                 d->data_done = uh_ubus_data_done;
 637                 d->close_fds = uh_ubus_close_fds;
 638                 d->free = uh_ubus_request_free;
 639                 d->ubus.jstok = json_tokener_new();
 640                 break;
 641
 642         case UH_HTTP_MSG_OPTIONS:
 643                 uh_ubus_send_header(cl);
 644                 ops->request_done(cl);
 645                 break;
 646
 647         default:
 648                 ops->client_error(cl, 400, "Bad Request", "Invalid Request");
 649         }
 650 }
 651
 652 static bool
 653 uh_ubus_check_url(const char *url)
 654 {
 655         return ops->path_match(conf.ubus_prefix, url);
 656 }
 657
 658 static int
 659 uh_ubus_init(void)
 660 {
 661         static struct dispatch_handler ubus_dispatch = {
 662                 .check_url = uh_ubus_check_url,
 663                 .handle_request = uh_ubus_handle_request,
 664         };
 665
 666         ctx = ubus_connect(conf.ubus_socket);
 667         if (!ctx) {
 668                 fprintf(stderr, "Unable to connect to ubus socket\n");
 669                 exit(1);
 670         }
 671
 672         ops->dispatch_add(&ubus_dispatch);
 673
 674         uloop_done();
 675         return 0;
 676 }
 677
 678
 679 static int uh_ubus_plugin_init(const struct uhttpd_ops *o, struct config *c)
 680 {
 681         ops = o;
 682         _conf = c;
 683         return uh_ubus_init();
 684 }
 685
 686 static void uh_ubus_post_init(void)
 687 {
 688         ubus_add_uloop(ctx);
 689 }
 690
 691 struct uhttpd_plugin uhttpd_plugin = {
 692         .init = uh_ubus_plugin_init,
 693         .post_init = uh_ubus_post_init,
 694 };