2 * uhttpd - Tiny single-threaded httpd
4 * Copyright (C) 2010-2013 Jo-Philipp Wich <xm@subsignal.org>
5 * Copyright (C) 2013 Felix Fietkau <nbd@openwrt.org>
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.
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.
20 #include <libubox/blobmsg.h>
21 #include <libubox/blobmsg_json.h>
22 #include <libubox/avl.h>
23 #include <libubox/avl-cmp.h>
30 static const struct uhttpd_ops
*ops
;
31 static struct config
*_conf
;
34 static struct ubus_context
*ctx
;
35 static struct blob_buf buf
;
37 #define UH_UBUS_MAX_POST_SIZE 4096
38 #define UH_UBUS_DEFAULT_SID "00000000000000000000000000000000"
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
},
60 static const struct blobmsg_policy ses_policy
[__SES_MAX
] = {
61 [SES_ACCESS
] = { .name
= "access", .type
= BLOBMSG_TYPE_BOOL
},
70 struct blob_attr
*data
;
71 struct blob_attr
*params
;
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" },
107 static void __uh_ubus_next_batched_request(struct uloop_timeout
*timeout
);
109 static void uh_ubus_next_batched_request(struct client
*cl
)
111 struct dispatch_ubus
*du
= &cl
->dispatch
.ubus
;
113 du
->timeout
.cb
= __uh_ubus_next_batched_request
;
114 uloop_timeout_set(&du
->timeout
, 1);
117 static void uh_ubus_send_header(struct client
*cl
)
119 ops
->http_header(cl
, 200, "OK");
120 ustream_printf(cl
->us
, "Content-Type: application/json\r\n\r\n");
123 static void uh_ubus_send_response(struct client
*cl
)
125 struct dispatch_ubus
*du
= &cl
->dispatch
.ubus
;
126 const char *sep
= "";
129 if (du
->array
&& du
->array_idx
> 1)
132 str
= blobmsg_format_json(buf
.head
, true);
133 ops
->chunk_printf(cl
, "%s%s", sep
, str
);
136 du
->jsobj_cur
= NULL
;
138 uh_ubus_next_batched_request(cl
);
140 return ops
->request_done(cl
);
143 static void uh_ubus_init_response(struct client
*cl
)
145 struct dispatch_ubus
*du
= &cl
->dispatch
.ubus
;
146 struct json_object
*obj
= du
->jsobj_cur
;
148 blob_buf_init(&buf
, 0);
149 blobmsg_add_string(&buf
, "jsonrpc", "2.0");
152 obj
= json_object_object_get(obj
, "id");
155 blobmsg_add_json_element(&buf
, "id", obj
);
157 blobmsg_add_field(&buf
, BLOBMSG_TYPE_UNSPEC
, "id", NULL
, 0);
160 static void uh_ubus_json_error(struct client
*cl
, enum rpc_error type
)
164 uh_ubus_init_response(cl
);
165 c
= blobmsg_open_table(&buf
, "error");
166 blobmsg_add_u32(&buf
, "code", json_errors
[type
].code
);
167 blobmsg_add_string(&buf
, "message", json_errors
[type
].msg
);
168 blobmsg_close_table(&buf
, c
);
169 uh_ubus_send_response(cl
);
173 uh_ubus_request_data_cb(struct ubus_request
*req
, int type
, struct blob_attr
*msg
)
175 struct dispatch_ubus
*du
= container_of(req
, struct dispatch_ubus
, req
);
177 blobmsg_add_field(&du
->buf
, BLOBMSG_TYPE_TABLE
, "", blob_data(msg
), blob_len(msg
));
181 uh_ubus_request_cb(struct ubus_request
*req
, int ret
)
183 struct dispatch_ubus
*du
= container_of(req
, struct dispatch_ubus
, req
);
184 struct client
*cl
= container_of(du
, struct client
, dispatch
.ubus
);
185 struct blob_attr
*cur
;
189 uloop_timeout_cancel(&du
->timeout
);
190 uh_ubus_init_response(cl
);
191 r
= blobmsg_open_array(&buf
, "result");
192 blobmsg_add_u32(&buf
, "", ret
);
193 blob_for_each_attr(cur
, du
->buf
.head
, rem
)
194 blobmsg_add_blob(&buf
, cur
);
195 blobmsg_close_array(&buf
, r
);
196 uh_ubus_send_response(cl
);
200 uh_ubus_timeout_cb(struct uloop_timeout
*timeout
)
202 struct dispatch_ubus
*du
= container_of(timeout
, struct dispatch_ubus
, timeout
);
203 struct client
*cl
= container_of(du
, struct client
, dispatch
.ubus
);
205 ubus_abort_request(ctx
, &du
->req
);
206 uh_ubus_json_error(cl
, ERROR_TIMEOUT
);
209 static void uh_ubus_close_fds(struct client
*cl
)
211 if (ctx
->sock
.fd
< 0)
218 static void uh_ubus_request_free(struct client
*cl
)
220 struct dispatch_ubus
*du
= &cl
->dispatch
.ubus
;
222 blob_buf_free(&du
->buf
);
223 uloop_timeout_cancel(&du
->timeout
);
226 json_object_put(du
->jsobj
);
229 json_tokener_free(du
->jstok
);
232 ubus_abort_request(ctx
, &du
->req
);
235 static void uh_ubus_single_error(struct client
*cl
, enum rpc_error type
)
237 uh_ubus_send_header(cl
);
238 uh_ubus_json_error(cl
, type
);
239 ops
->request_done(cl
);
242 static void uh_ubus_send_request(struct client
*cl
, json_object
*obj
, const char *sid
, struct blob_attr
*args
)
244 struct dispatch
*d
= &cl
->dispatch
;
245 struct dispatch_ubus
*du
= &d
->ubus
;
246 struct blob_attr
*cur
;
247 static struct blob_buf req
;
250 blob_buf_init(&req
, 0);
251 blobmsg_for_each_attr(cur
, args
, rem
) {
252 if (!strcmp(blobmsg_name(cur
), "ubus_rpc_session"))
253 return uh_ubus_json_error(cl
, ERROR_PARAMS
);
254 blobmsg_add_blob(&req
, cur
);
257 blobmsg_add_string(&req
, "ubus_rpc_session", sid
);
259 blob_buf_init(&du
->buf
, 0);
260 memset(&du
->req
, 0, sizeof(du
->req
));
261 ret
= ubus_invoke_async(ctx
, du
->obj
, du
->func
, req
.head
, &du
->req
);
263 return uh_ubus_json_error(cl
, ERROR_INTERNAL
);
265 du
->req
.data_cb
= uh_ubus_request_data_cb
;
266 du
->req
.complete_cb
= uh_ubus_request_cb
;
267 ubus_complete_request_async(ctx
, &du
->req
);
269 du
->timeout
.cb
= uh_ubus_timeout_cb
;
270 uloop_timeout_set(&du
->timeout
, conf
.script_timeout
* 1000);
272 du
->req_pending
= true;
275 static void uh_ubus_list_cb(struct ubus_context
*ctx
, struct ubus_object_data
*obj
, void *priv
)
277 struct blob_attr
*sig
, *attr
;
278 struct list_data
*data
= priv
;
282 if (!data
->verbose
) {
283 blobmsg_add_string(data
->buf
, NULL
, obj
->path
);
290 o
= blobmsg_open_table(data
->buf
, obj
->path
);
291 blob_for_each_attr(sig
, obj
->signature
, rem
) {
292 t
= blobmsg_open_table(data
->buf
, blobmsg_name(sig
));
293 rem2
= blobmsg_data_len(sig
);
294 __blob_for_each_attr(attr
, blobmsg_data(sig
), rem2
) {
295 if (blob_id(attr
) != BLOBMSG_TYPE_INT32
)
298 switch (blobmsg_get_u32(attr
)) {
299 case BLOBMSG_TYPE_INT8
:
300 blobmsg_add_string(data
->buf
, blobmsg_name(attr
), "boolean");
302 case BLOBMSG_TYPE_INT32
:
303 blobmsg_add_string(data
->buf
, blobmsg_name(attr
), "number");
305 case BLOBMSG_TYPE_STRING
:
306 blobmsg_add_string(data
->buf
, blobmsg_name(attr
), "string");
308 case BLOBMSG_TYPE_ARRAY
:
309 blobmsg_add_string(data
->buf
, blobmsg_name(attr
), "array");
311 case BLOBMSG_TYPE_TABLE
:
312 blobmsg_add_string(data
->buf
, blobmsg_name(attr
), "object");
315 blobmsg_add_string(data
->buf
, blobmsg_name(attr
), "unknown");
319 blobmsg_close_table(data
->buf
, t
);
321 blobmsg_close_table(data
->buf
, o
);
324 static void uh_ubus_send_list(struct client
*cl
, json_object
*obj
, struct blob_attr
*params
)
326 struct blob_attr
*cur
, *dup
;
327 struct list_data data
= { .buf
= &cl
->dispatch
.ubus
.buf
, .verbose
= false };
331 blob_buf_init(data
.buf
, 0);
335 if (!params
|| blob_id(params
) != BLOBMSG_TYPE_ARRAY
) {
336 r
= blobmsg_open_array(data
.buf
, "result");
337 ubus_lookup(ctx
, NULL
, uh_ubus_list_cb
, &data
);
338 blobmsg_close_array(data
.buf
, r
);
341 r
= blobmsg_open_table(data
.buf
, "result");
342 dup
= blob_memdup(params
);
345 rem
= blobmsg_data_len(dup
);
347 __blob_for_each_attr(cur
, blobmsg_data(dup
), rem
)
348 ubus_lookup(ctx
, blobmsg_data(cur
), uh_ubus_list_cb
, &data
);
351 blobmsg_close_table(data
.buf
, r
);
356 uh_ubus_init_response(cl
);
357 blobmsg_add_blob(&buf
, blob_data(data
.buf
->head
));
358 uh_ubus_send_response(cl
);
361 static bool parse_json_rpc(struct rpc_data
*d
, struct blob_attr
*data
)
363 const struct blobmsg_policy data_policy
[] = {
364 { .type
= BLOBMSG_TYPE_STRING
},
365 { .type
= BLOBMSG_TYPE_STRING
},
366 { .type
= BLOBMSG_TYPE_STRING
},
367 { .type
= BLOBMSG_TYPE_TABLE
},
369 struct blob_attr
*tb
[__RPC_MAX
];
370 struct blob_attr
*tb2
[4];
371 struct blob_attr
*cur
;
373 blobmsg_parse(rpc_policy
, __RPC_MAX
, tb
, blob_data(data
), blob_len(data
));
375 cur
= tb
[RPC_JSONRPC
];
376 if (!cur
|| strcmp(blobmsg_data(cur
), "2.0") != 0)
379 cur
= tb
[RPC_METHOD
];
384 d
->method
= blobmsg_data(cur
);
386 cur
= tb
[RPC_PARAMS
];
390 d
->params
= blob_memdup(cur
);
394 blobmsg_parse_array(data_policy
, ARRAY_SIZE(data_policy
), tb2
,
395 blobmsg_data(d
->params
), blobmsg_data_len(d
->params
));
398 d
->sid
= blobmsg_data(tb2
[0]);
400 if (conf
.ubus_noauth
&& (!d
->sid
|| !*d
->sid
))
401 d
->sid
= UH_UBUS_DEFAULT_SID
;
404 d
->object
= blobmsg_data(tb2
[1]);
407 d
->function
= blobmsg_data(tb2
[2]);
414 static void uh_ubus_init_batch(struct client
*cl
)
416 struct dispatch_ubus
*du
= &cl
->dispatch
.ubus
;
419 uh_ubus_send_header(cl
);
420 ops
->chunk_printf(cl
, "[");
423 static void uh_ubus_complete_batch(struct client
*cl
)
425 ops
->chunk_printf(cl
, "]");
426 ops
->request_done(cl
);
429 static void uh_ubus_allowed_cb(struct ubus_request
*req
, int type
, struct blob_attr
*msg
)
431 struct blob_attr
*tb
[__SES_MAX
];
432 bool *allow
= (bool *)req
->priv
;
437 blobmsg_parse(ses_policy
, __SES_MAX
, tb
, blob_data(msg
), blob_len(msg
));
440 *allow
= blobmsg_get_bool(tb
[SES_ACCESS
]);
443 static bool uh_ubus_allowed(const char *sid
, const char *obj
, const char *fun
)
447 static struct blob_buf req
;
449 if (ubus_lookup_id(ctx
, "session", &id
))
452 blob_buf_init(&req
, 0);
453 blobmsg_add_string(&req
, "ubus_rpc_session", sid
);
454 blobmsg_add_string(&req
, "object", obj
);
455 blobmsg_add_string(&req
, "function", fun
);
457 ubus_invoke(ctx
, id
, "access", req
.head
, uh_ubus_allowed_cb
, &allow
, conf
.script_timeout
* 500);
462 static void uh_ubus_handle_request_object(struct client
*cl
, struct json_object
*obj
)
464 struct dispatch_ubus
*du
= &cl
->dispatch
.ubus
;
465 struct rpc_data data
= {};
466 enum rpc_error err
= ERROR_PARSE
;
470 if (json_object_get_type(obj
) != json_type_object
)
474 blob_buf_init(&buf
, 0);
475 if (!blobmsg_add_object(&buf
, obj
))
478 if (!parse_json_rpc(&data
, buf
.head
))
481 if (!strcmp(data
.method
, "call")) {
482 if (!data
.sid
|| !data
.object
|| !data
.function
|| !data
.data
)
485 du
->func
= data
.function
;
486 if (ubus_lookup_id(ctx
, data
.object
, &du
->obj
)) {
491 if (!conf
.ubus_noauth
&& !uh_ubus_allowed(data
.sid
, data
.object
, data
.function
)) {
496 uh_ubus_send_request(cl
, obj
, data
.sid
, data
.data
);
499 else if (!strcmp(data
.method
, "list")) {
500 uh_ubus_send_list(cl
, obj
, data
.params
);
509 uh_ubus_json_error(cl
, err
);
517 static void __uh_ubus_next_batched_request(struct uloop_timeout
*timeout
)
519 struct dispatch_ubus
*du
= container_of(timeout
, struct dispatch_ubus
, timeout
);
520 struct client
*cl
= container_of(du
, struct client
, dispatch
.ubus
);
521 struct json_object
*obj
= du
->jsobj
;
524 len
= json_object_array_length(obj
);
525 if (du
->array_idx
>= len
)
526 return uh_ubus_complete_batch(cl
);
528 obj
= json_object_array_get_idx(obj
, du
->array_idx
++);
529 uh_ubus_handle_request_object(cl
, obj
);
532 static void uh_ubus_data_done(struct client
*cl
)
534 struct dispatch_ubus
*du
= &cl
->dispatch
.ubus
;
535 struct json_object
*obj
= du
->jsobj
;
537 switch (obj
? json_object_get_type(obj
) : json_type_null
) {
538 case json_type_object
:
539 uh_ubus_send_header(cl
);
540 return uh_ubus_handle_request_object(cl
, obj
);
541 case json_type_array
:
542 uh_ubus_init_batch(cl
);
543 return uh_ubus_next_batched_request(cl
);
545 return uh_ubus_single_error(cl
, ERROR_PARSE
);
549 static int uh_ubus_data_send(struct client
*cl
, const char *data
, int len
)
551 struct dispatch_ubus
*du
= &cl
->dispatch
.ubus
;
553 if (du
->jsobj
|| !du
->jstok
)
557 if (du
->post_len
> UH_UBUS_MAX_POST_SIZE
)
560 du
->jsobj
= json_tokener_parse_ex(du
->jstok
, data
, len
);
564 uh_ubus_single_error(cl
, ERROR_PARSE
);
568 static void uh_ubus_handle_request(struct client
*cl
, char *url
, struct path_info
*pi
)
570 struct dispatch
*d
= &cl
->dispatch
;
572 blob_buf_init(&buf
, 0);
574 if (cl
->request
.method
!= UH_HTTP_MSG_POST
)
575 return ops
->client_error(cl
, 400, "Bad Request", "Invalid Request");
577 d
->close_fds
= uh_ubus_close_fds
;
578 d
->free
= uh_ubus_request_free
;
579 d
->data_send
= uh_ubus_data_send
;
580 d
->data_done
= uh_ubus_data_done
;
581 d
->ubus
.jstok
= json_tokener_new();
585 uh_ubus_check_url(const char *url
)
587 return ops
->path_match(conf
.ubus_prefix
, url
);
593 static struct dispatch_handler ubus_dispatch
= {
594 .check_url
= uh_ubus_check_url
,
595 .handle_request
= uh_ubus_handle_request
,
598 ctx
= ubus_connect(conf
.ubus_socket
);
600 fprintf(stderr
, "Unable to connect to ubus socket\n");
604 ops
->dispatch_add(&ubus_dispatch
);
611 static int uh_ubus_plugin_init(const struct uhttpd_ops
*o
, struct config
*c
)
615 return uh_ubus_init();
618 static void uh_ubus_post_init(void)
623 const struct uhttpd_plugin uhttpd_plugin
= {
624 .init
= uh_ubus_plugin_init
,
625 .post_init
= uh_ubus_post_init
,