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_ARRAY },
  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         blob_buf_init(&buf, 0);
 198         blobmsg_add_string(&buf, "jsonrpc", "2.0");
 199
 200         if (obj)
 201                 json_object_object_get_ex(obj, "id", &obj2);
 202
 203         if (obj2)
 204                 blobmsg_add_json_element(&buf, "id", obj2);
 205         else
 206                 blobmsg_add_field(&buf, BLOBMSG_TYPE_UNSPEC, "id", NULL, 0);
 207 }
 208
 209 static void uh_ubus_json_error(struct client *cl, enum rpc_error type)
 210 {
 211         void *c;
 212
 213         uh_ubus_init_response(cl);
 214         c = blobmsg_open_table(&buf, "error");
 215         blobmsg_add_u32(&buf, "code", json_errors[type].code);
 216         blobmsg_add_string(&buf, "message", json_errors[type].msg);
 217         blobmsg_close_table(&buf, c);
 218         uh_ubus_send_response(cl);
 219 }
 220
 221 static void
 222 uh_ubus_request_data_cb(struct ubus_request *req, int type, struct blob_attr *msg)
 223 {
 224         struct dispatch_ubus *du = container_of(req, struct dispatch_ubus, req);
 225
 226         blobmsg_add_field(&du->buf, BLOBMSG_TYPE_TABLE, "", blob_data(msg), blob_len(msg));
 227 }
 228
 229 static void
 230 uh_ubus_request_cb(struct ubus_request *req, int ret)
 231 {
 232         struct dispatch_ubus *du = container_of(req, struct dispatch_ubus, req);
 233         struct client *cl = container_of(du, struct client, dispatch.ubus);
 234         struct blob_attr *cur;
 235         void *r;
 236         int rem;
 237
 238         uloop_timeout_cancel(&du->timeout);
 239         uh_ubus_init_response(cl);
 240         r = blobmsg_open_array(&buf, "result");
 241         blobmsg_add_u32(&buf, "", ret);
 242         blob_for_each_attr(cur, du->buf.head, rem)
 243                 blobmsg_add_blob(&buf, cur);
 244         blobmsg_close_array(&buf, r);
 245         uh_ubus_send_response(cl);
 246 }
 247
 248 static void
 249 uh_ubus_timeout_cb(struct uloop_timeout *timeout)
 250 {
 251         struct dispatch_ubus *du = container_of(timeout, struct dispatch_ubus, timeout);
 252         struct client *cl = container_of(du, struct client, dispatch.ubus);
 253
 254         ubus_abort_request(ctx, &du->req);
 255         uh_ubus_json_error(cl, ERROR_TIMEOUT);
 256 }
 257
 258 static void uh_ubus_close_fds(struct client *cl)
 259 {
 260         if (ctx->sock.fd < 0)
 261                 return;
 262
 263         close(ctx->sock.fd);
 264         ctx->sock.fd = -1;
 265 }
 266
 267 static void uh_ubus_request_free(struct client *cl)
 268 {
 269         struct dispatch_ubus *du = &cl->dispatch.ubus;
 270
 271         blob_buf_free(&du->buf);
 272         uloop_timeout_cancel(&du->timeout);
 273
 274         if (du->jsobj)
 275                 json_object_put(du->jsobj);
 276
 277         if (du->jstok)
 278                 json_tokener_free(du->jstok);
 279
 280         if (du->req_pending)
 281                 ubus_abort_request(ctx, &du->req);
 282 }
 283
 284 static void uh_ubus_single_error(struct client *cl, enum rpc_error type)
 285 {
 286         uh_ubus_send_header(cl);
 287         uh_ubus_json_error(cl, type);
 288         ops->request_done(cl);
 289 }
 290
 291 static void uh_ubus_send_request(struct client *cl, json_object *obj, const char *sid, struct blob_attr *args)
 292 {
 293         struct dispatch *d = &cl->dispatch;
 294         struct dispatch_ubus *du = &d->ubus;
 295         struct blob_attr *cur;
 296         static struct blob_buf req;
 297         int ret, rem;
 298
 299         blob_buf_init(&req, 0);
 300         blobmsg_for_each_attr(cur, args, rem) {
 301                 if (!strcmp(blobmsg_name(cur), "ubus_rpc_session"))
 302                         return uh_ubus_json_error(cl, ERROR_PARAMS);
 303                 blobmsg_add_blob(&req, cur);
 304         }
 305
 306         blobmsg_add_string(&req, "ubus_rpc_session", sid);
 307
 308         blob_buf_init(&du->buf, 0);
 309         memset(&du->req, 0, sizeof(du->req));
 310         ret = ubus_invoke_async(ctx, du->obj, du->func, req.head, &du->req);
 311         if (ret)
 312                 return uh_ubus_json_error(cl, ERROR_INTERNAL);
 313
 314         du->req.data_cb = uh_ubus_request_data_cb;
 315         du->req.complete_cb = uh_ubus_request_cb;
 316         ubus_complete_request_async(ctx, &du->req);
 317
 318         du->timeout.cb = uh_ubus_timeout_cb;
 319         uloop_timeout_set(&du->timeout, conf.script_timeout * 1000);
 320
 321         du->req_pending = true;
 322 }
 323
 324 static void uh_ubus_list_cb(struct ubus_context *ctx, struct ubus_object_data *obj, void *priv)
 325 {
 326         struct blob_attr *sig, *attr;
 327         struct list_data *data = priv;
 328         int rem, rem2;
 329         void *t, *o;
 330
 331         if (!data->verbose) {
 332                 blobmsg_add_string(data->buf, NULL, obj->path);
 333                 return;
 334         }
 335
 336         if (!obj->signature)
 337                 return;
 338
 339         o = blobmsg_open_table(data->buf, obj->path);
 340         blob_for_each_attr(sig, obj->signature, rem) {
 341                 t = blobmsg_open_table(data->buf, blobmsg_name(sig));
 342                 rem2 = blobmsg_data_len(sig);
 343                 __blob_for_each_attr(attr, blobmsg_data(sig), rem2) {
 344                         if (blob_id(attr) != BLOBMSG_TYPE_INT32)
 345                                 continue;
 346
 347                         switch (blobmsg_get_u32(attr)) {
 348                         case BLOBMSG_TYPE_INT8:
 349                                 blobmsg_add_string(data->buf, blobmsg_name(attr), "boolean");
 350                                 break;
 351                         case BLOBMSG_TYPE_INT32:
 352                                 blobmsg_add_string(data->buf, blobmsg_name(attr), "number");
 353                                 break;
 354                         case BLOBMSG_TYPE_STRING:
 355                                 blobmsg_add_string(data->buf, blobmsg_name(attr), "string");
 356                                 break;
 357                         case BLOBMSG_TYPE_ARRAY:
 358                                 blobmsg_add_string(data->buf, blobmsg_name(attr), "array");
 359                                 break;
 360                         case BLOBMSG_TYPE_TABLE:
 361                                 blobmsg_add_string(data->buf, blobmsg_name(attr), "object");
 362                                 break;
 363                         default:
 364                                 blobmsg_add_string(data->buf, blobmsg_name(attr), "unknown");
 365                                 break;
 366                         }
 367                 }
 368                 blobmsg_close_table(data->buf, t);
 369         }
 370         blobmsg_close_table(data->buf, o);
 371 }
 372
 373 static void uh_ubus_send_list(struct client *cl, json_object *obj, struct blob_attr *params)
 374 {
 375         struct blob_attr *cur, *dup;
 376         struct list_data data = { .buf = &cl->dispatch.ubus.buf, .verbose = false };
 377         void *r;
 378         int rem;
 379
 380         blob_buf_init(data.buf, 0);
 381
 382         uh_client_ref(cl);
 383
 384         if (!params || blob_id(params) != BLOBMSG_TYPE_ARRAY) {
 385                 r = blobmsg_open_array(data.buf, "result");
 386                 ubus_lookup(ctx, NULL, uh_ubus_list_cb, &data);
 387                 blobmsg_close_array(data.buf, r);
 388         }
 389         else {
 390                 r = blobmsg_open_table(data.buf, "result");
 391                 dup = blob_memdup(params);
 392                 if (dup)
 393                 {
 394                         rem = blobmsg_data_len(dup);
 395                         data.verbose = true;
 396                         __blob_for_each_attr(cur, blobmsg_data(dup), rem)
 397                                 ubus_lookup(ctx, blobmsg_data(cur), uh_ubus_list_cb, &data);
 398                         free(dup);
 399                 }
 400                 blobmsg_close_table(data.buf, r);
 401         }
 402
 403         uh_client_unref(cl);
 404
 405         uh_ubus_init_response(cl);
 406         blobmsg_add_blob(&buf, blob_data(data.buf->head));
 407         uh_ubus_send_response(cl);
 408 }
 409
 410 static bool parse_json_rpc(struct rpc_data *d, struct blob_attr *data)
 411 {
 412         const struct blobmsg_policy data_policy[] = {
 413                 { .type = BLOBMSG_TYPE_STRING },
 414                 { .type = BLOBMSG_TYPE_STRING },
 415                 { .type = BLOBMSG_TYPE_STRING },
 416                 { .type = BLOBMSG_TYPE_TABLE },
 417         };
 418         struct blob_attr *tb[__RPC_MAX];
 419         struct blob_attr *tb2[4];
 420         struct blob_attr *cur;
 421
 422         blobmsg_parse(rpc_policy, __RPC_MAX, tb, blob_data(data), blob_len(data));
 423
 424         cur = tb[RPC_JSONRPC];
 425         if (!cur || strcmp(blobmsg_data(cur), "2.0") != 0)
 426                 return false;
 427
 428         cur = tb[RPC_METHOD];
 429         if (!cur)
 430                 return false;
 431
 432         d->id = tb[RPC_ID];
 433         d->method = blobmsg_data(cur);
 434
 435         cur = tb[RPC_PARAMS];
 436         if (!cur)
 437                 return true;
 438
 439         d->params = blob_memdup(cur);
 440         if (!d->params)
 441                 return false;
 442
 443         blobmsg_parse_array(data_policy, ARRAY_SIZE(data_policy), tb2,
 444                             blobmsg_data(d->params), blobmsg_data_len(d->params));
 445
 446         if (tb2[0])
 447                 d->sid = blobmsg_data(tb2[0]);
 448
 449         if (conf.ubus_noauth && (!d->sid || !*d->sid))
 450                 d->sid = UH_UBUS_DEFAULT_SID;
 451
 452         if (tb2[1])
 453                 d->object = blobmsg_data(tb2[1]);
 454
 455         if (tb2[2])
 456                 d->function = blobmsg_data(tb2[2]);
 457
 458         d->data = tb2[3];
 459
 460         return true;
 461 }
 462
 463 static void uh_ubus_init_batch(struct client *cl)
 464 {
 465         struct dispatch_ubus *du = &cl->dispatch.ubus;
 466
 467         du->array = true;
 468         uh_ubus_send_header(cl);
 469         ops->chunk_printf(cl, "[");
 470 }
 471
 472 static void uh_ubus_complete_batch(struct client *cl)
 473 {
 474         ops->chunk_printf(cl, "]");
 475         ops->request_done(cl);
 476 }
 477
 478 static void uh_ubus_allowed_cb(struct ubus_request *req, int type, struct blob_attr *msg)
 479 {
 480         struct blob_attr *tb[__SES_MAX];
 481         bool *allow = (bool *)req->priv;
 482
 483         if (!msg)
 484                 return;
 485
 486         blobmsg_parse(ses_policy, __SES_MAX, tb, blob_data(msg), blob_len(msg));
 487
 488         if (tb[SES_ACCESS])
 489                 *allow = blobmsg_get_bool(tb[SES_ACCESS]);
 490 }
 491
 492 static bool uh_ubus_allowed(const char *sid, const char *obj, const char *fun)
 493 {
 494         uint32_t id;
 495         bool allow = false;
 496         static struct blob_buf req;
 497
 498         if (ubus_lookup_id(ctx, "session", &id))
 499                 return false;
 500
 501         blob_buf_init(&req, 0);
 502         blobmsg_add_string(&req, "ubus_rpc_session", sid);
 503         blobmsg_add_string(&req, "object", obj);
 504         blobmsg_add_string(&req, "function", fun);
 505
 506         ubus_invoke(ctx, id, "access", req.head, uh_ubus_allowed_cb, &allow, conf.script_timeout * 500);
 507
 508         return allow;
 509 }
 510
 511 static void uh_ubus_handle_request_object(struct client *cl, struct json_object *obj)
 512 {
 513         struct dispatch_ubus *du = &cl->dispatch.ubus;
 514         struct rpc_data data = {};
 515         enum rpc_error err = ERROR_PARSE;
 516
 517         uh_client_ref(cl);
 518
 519         if (json_object_get_type(obj) != json_type_object)
 520                 goto error;
 521
 522         du->jsobj_cur = obj;
 523         blob_buf_init(&buf, 0);
 524         if (!blobmsg_add_object(&buf, obj))
 525                 goto error;
 526
 527         if (!parse_json_rpc(&data, buf.head))
 528                 goto error;
 529
 530         if (!strcmp(data.method, "call")) {
 531                 if (!data.sid || !data.object || !data.function || !data.data)
 532                         goto error;
 533
 534                 du->func = data.function;
 535                 if (ubus_lookup_id(ctx, data.object, &du->obj)) {
 536                         err = ERROR_OBJECT;
 537                         goto error;
 538                 }
 539
 540                 if (!conf.ubus_noauth && !uh_ubus_allowed(data.sid, data.object, data.function)) {
 541                         err = ERROR_ACCESS;
 542                         goto error;
 543                 }
 544
 545                 uh_ubus_send_request(cl, obj, data.sid, data.data);
 546                 goto out;
 547         }
 548         else if (!strcmp(data.method, "list")) {
 549                 uh_ubus_send_list(cl, obj, data.params);
 550                 goto out;
 551         }
 552         else {
 553                 err = ERROR_METHOD;
 554                 goto error;
 555         }
 556
 557 error:
 558         uh_ubus_json_error(cl, err);
 559 out:
 560         if (data.params)
 561                 free(data.params);
 562
 563         uh_client_unref(cl);
 564 }
 565
 566 static void __uh_ubus_next_batched_request(struct uloop_timeout *timeout)
 567 {
 568         struct dispatch_ubus *du = container_of(timeout, struct dispatch_ubus, timeout);
 569         struct client *cl = container_of(du, struct client, dispatch.ubus);
 570         struct json_object *obj = du->jsobj;
 571         int len;
 572
 573         len = json_object_array_length(obj);
 574         if (du->array_idx >= len)
 575                 return uh_ubus_complete_batch(cl);
 576
 577         obj = json_object_array_get_idx(obj, du->array_idx++);
 578         uh_ubus_handle_request_object(cl, obj);
 579 }
 580
 581 static void uh_ubus_data_done(struct client *cl)
 582 {
 583         struct dispatch_ubus *du = &cl->dispatch.ubus;
 584         struct json_object *obj = du->jsobj;
 585
 586         switch (obj ? json_object_get_type(obj) : json_type_null) {
 587         case json_type_object:
 588                 uh_ubus_send_header(cl);
 589                 return uh_ubus_handle_request_object(cl, obj);
 590         case json_type_array:
 591                 uh_ubus_init_batch(cl);
 592                 return uh_ubus_next_batched_request(cl);
 593         default:
 594                 return uh_ubus_single_error(cl, ERROR_PARSE);
 595         }
 596 }
 597
 598 static int uh_ubus_data_send(struct client *cl, const char *data, int len)
 599 {
 600         struct dispatch_ubus *du = &cl->dispatch.ubus;
 601
 602         if (du->jsobj || !du->jstok)
 603                 goto error;
 604
 605         du->post_len += len;
 606         if (du->post_len > UH_UBUS_MAX_POST_SIZE)
 607                 goto error;
 608
 609         du->jsobj = json_tokener_parse_ex(du->jstok, data, len);
 610         return len;
 611
 612 error:
 613         uh_ubus_single_error(cl, ERROR_PARSE);
 614         return 0;
 615 }
 616
 617 static void uh_ubus_handle_request(struct client *cl, char *url, struct path_info *pi)
 618 {
 619         struct dispatch *d = &cl->dispatch;
 620
 621         blob_buf_init(&buf, 0);
 622
 623         switch (cl->request.method)
 624         {
 625         case UH_HTTP_MSG_POST:
 626                 d->data_send = uh_ubus_data_send;
 627                 d->data_done = uh_ubus_data_done;
 628                 d->close_fds = uh_ubus_close_fds;
 629                 d->free = uh_ubus_request_free;
 630                 d->ubus.jstok = json_tokener_new();
 631                 break;
 632
 633         case UH_HTTP_MSG_OPTIONS:
 634                 uh_ubus_send_header(cl);
 635                 ops->request_done(cl);
 636                 break;
 637
 638         default:
 639                 ops->client_error(cl, 400, "Bad Request", "Invalid Request");
 640         }
 641 }
 642
 643 static bool
 644 uh_ubus_check_url(const char *url)
 645 {
 646         return ops->path_match(conf.ubus_prefix, url);
 647 }
 648
 649 static int
 650 uh_ubus_init(void)
 651 {
 652         static struct dispatch_handler ubus_dispatch = {
 653                 .check_url = uh_ubus_check_url,
 654                 .handle_request = uh_ubus_handle_request,
 655         };
 656
 657         ctx = ubus_connect(conf.ubus_socket);
 658         if (!ctx) {
 659                 fprintf(stderr, "Unable to connect to ubus socket\n");
 660                 exit(1);
 661         }
 662
 663         ops->dispatch_add(&ubus_dispatch);
 664
 665         uloop_done();
 666         return 0;
 667 }
 668
 669
 670 static int uh_ubus_plugin_init(const struct uhttpd_ops *o, struct config *c)
 671 {
 672         ops = o;
 673         _conf = c;
 674         return uh_ubus_init();
 675 }
 676
 677 static void uh_ubus_post_init(void)
 678 {
 679         ubus_add_uloop(ctx);
 680 }
 681
 682 struct uhttpd_plugin uhttpd_plugin = {
 683         .init = uh_ubus_plugin_init,
 684         .post_init = uh_ubus_post_init,
 685 };