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
47 static const struct blobmsg_policy rpc_policy
[__RPC_MAX
] = {
48 [RPC_JSONRPC
] = { .name
= "jsonrpc", .type
= BLOBMSG_TYPE_STRING
},
49 [RPC_METHOD
] = { .name
= "method", .type
= BLOBMSG_TYPE_STRING
},
50 [RPC_PARAMS
] = { .name
= "params", .type
= BLOBMSG_TYPE_ARRAY
},
51 [RPC_ID
] = { .name
= "id", .type
= BLOBMSG_TYPE_UNSPEC
},
59 static const struct blobmsg_policy ses_policy
[__SES_MAX
] = {
60 [SES_ACCESS
] = { .name
= "access", .type
= BLOBMSG_TYPE_BOOL
},
68 struct blob_attr
*data
;
87 } json_errors
[__ERROR_MAX
] = {
88 [ERROR_PARSE
] = { -32700, "Parse error" },
89 [ERROR_REQUEST
] = { -32600, "Invalid request" },
90 [ERROR_METHOD
] = { -32601, "Method not found" },
91 [ERROR_PARAMS
] = { -32602, "Invalid parameters" },
92 [ERROR_INTERNAL
] = { -32603, "Internal error" },
93 [ERROR_OBJECT
] = { -32000, "Object not found" },
94 [ERROR_SESSION
] = { -32001, "Session not found" },
95 [ERROR_ACCESS
] = { -32002, "Access denied" },
96 [ERROR_TIMEOUT
] = { -32003, "ubus request timed out" },
99 static void __uh_ubus_next_batched_request(struct uloop_timeout
*timeout
);
101 static void uh_ubus_next_batched_request(struct client
*cl
)
103 struct dispatch_ubus
*du
= &cl
->dispatch
.ubus
;
105 du
->timeout
.cb
= __uh_ubus_next_batched_request
;
106 uloop_timeout_set(&du
->timeout
, 1);
109 static void uh_ubus_send_header(struct client
*cl
)
111 ops
->http_header(cl
, 200, "OK");
112 ustream_printf(cl
->us
, "Content-Type: application/json\r\n\r\n");
115 static void uh_ubus_send_response(struct client
*cl
)
117 struct dispatch_ubus
*du
= &cl
->dispatch
.ubus
;
118 const char *sep
= "";
121 if (du
->array
&& du
->array_idx
> 1)
124 str
= blobmsg_format_json_indent(buf
.head
, true, du
->array
);
125 ops
->chunk_printf(cl
, "%s%s", sep
, str
);
128 du
->jsobj_cur
= NULL
;
130 uh_ubus_next_batched_request(cl
);
132 ops
->chunk_printf(cl
, "\n");
133 return ops
->request_done(cl
);
137 static void uh_ubus_init_response(struct client
*cl
)
139 struct dispatch_ubus
*du
= &cl
->dispatch
.ubus
;
140 struct json_object
*obj
= du
->jsobj_cur
;
142 blob_buf_init(&buf
, 0);
143 blobmsg_add_string(&buf
, "jsonrpc", "2.0");
146 obj
= json_object_object_get(obj
, "id");
149 blobmsg_add_json_element(&buf
, "id", obj
);
151 blobmsg_add_field(&buf
, BLOBMSG_TYPE_UNSPEC
, "id", NULL
, 0);
154 static void uh_ubus_json_error(struct client
*cl
, enum rpc_error type
)
158 uh_ubus_init_response(cl
);
159 c
= blobmsg_open_table(&buf
, "error");
160 blobmsg_add_u32(&buf
, "code", json_errors
[type
].code
);
161 blobmsg_add_string(&buf
, "message", json_errors
[type
].msg
);
162 blobmsg_close_table(&buf
, c
);
163 uh_ubus_send_response(cl
);
167 uh_ubus_request_data_cb(struct ubus_request
*req
, int type
, struct blob_attr
*msg
)
169 struct dispatch_ubus
*du
= container_of(req
, struct dispatch_ubus
, req
);
171 blobmsg_add_field(&du
->buf
, BLOBMSG_TYPE_TABLE
, "", blob_data(msg
), blob_len(msg
));
175 uh_ubus_request_cb(struct ubus_request
*req
, int ret
)
177 struct dispatch_ubus
*du
= container_of(req
, struct dispatch_ubus
, req
);
178 struct client
*cl
= container_of(du
, struct client
, dispatch
.ubus
);
179 struct blob_attr
*cur
;
183 uloop_timeout_cancel(&du
->timeout
);
184 uh_ubus_init_response(cl
);
185 r
= blobmsg_open_array(&buf
, "result");
186 blobmsg_add_u32(&buf
, "", ret
);
187 blob_for_each_attr(cur
, du
->buf
.head
, rem
)
188 blobmsg_add_blob(&buf
, cur
);
189 blobmsg_close_array(&buf
, r
);
190 uh_ubus_send_response(cl
);
194 uh_ubus_timeout_cb(struct uloop_timeout
*timeout
)
196 struct dispatch_ubus
*du
= container_of(timeout
, struct dispatch_ubus
, timeout
);
197 struct client
*cl
= container_of(du
, struct client
, dispatch
.ubus
);
199 ubus_abort_request(ctx
, &du
->req
);
200 uh_ubus_json_error(cl
, ERROR_TIMEOUT
);
203 static void uh_ubus_close_fds(struct client
*cl
)
205 if (ctx
->sock
.fd
< 0)
212 static void uh_ubus_request_free(struct client
*cl
)
214 struct dispatch_ubus
*du
= &cl
->dispatch
.ubus
;
216 blob_buf_free(&du
->buf
);
217 uloop_timeout_cancel(&cl
->timeout
);
220 json_object_put(du
->jsobj
);
223 json_tokener_free(du
->jstok
);
226 ubus_abort_request(ctx
, &du
->req
);
229 static void uh_ubus_single_error(struct client
*cl
, enum rpc_error type
)
231 uh_ubus_send_header(cl
);
232 uh_ubus_json_error(cl
, type
);
233 ops
->request_done(cl
);
236 static void uh_ubus_send_request(struct client
*cl
, json_object
*obj
)
238 struct dispatch
*d
= &cl
->dispatch
;
239 struct dispatch_ubus
*du
= &d
->ubus
;
242 blob_buf_init(&du
->buf
, 0);
243 memset(&du
->req
, 0, sizeof(du
->req
));
244 ret
= ubus_invoke_async(ctx
, du
->obj
, du
->func
, buf
.head
, &du
->req
);
246 return uh_ubus_json_error(cl
, ERROR_INTERNAL
);
248 du
->req
.data_cb
= uh_ubus_request_data_cb
;
249 du
->req
.complete_cb
= uh_ubus_request_cb
;
250 ubus_complete_request_async(ctx
, &du
->req
);
252 du
->timeout
.cb
= uh_ubus_timeout_cb
;
253 uloop_timeout_set(&du
->timeout
, conf
.script_timeout
);
255 du
->req_pending
= true;
258 static bool parse_json_rpc(struct rpc_data
*d
, struct blob_attr
*data
)
260 const struct blobmsg_policy data_policy
[] = {
261 { .type
= BLOBMSG_TYPE_STRING
},
262 { .type
= BLOBMSG_TYPE_STRING
},
263 { .type
= BLOBMSG_TYPE_TABLE
},
265 struct blob_attr
*tb
[__RPC_MAX
];
266 struct blob_attr
*tb2
[3];
267 struct blob_attr
*cur
;
269 blobmsg_parse(rpc_policy
, __RPC_MAX
, tb
, blob_data(data
), blob_len(data
));
271 cur
= tb
[RPC_JSONRPC
];
272 if (!cur
|| strcmp(blobmsg_data(cur
), "2.0") != 0)
275 cur
= tb
[RPC_METHOD
];
280 d
->method
= blobmsg_data(cur
);
282 cur
= tb
[RPC_PARAMS
];
286 blobmsg_parse_array(data_policy
, ARRAY_SIZE(data_policy
), tb2
,
287 blobmsg_data(cur
), blobmsg_data_len(cur
));
289 if (!tb2
[0] || !tb2
[1] || !tb2
[2])
292 d
->object
= blobmsg_data(tb2
[0]);
293 d
->function
= blobmsg_data(tb2
[1]);
298 static void uh_ubus_init_batch(struct client
*cl
)
300 struct dispatch_ubus
*du
= &cl
->dispatch
.ubus
;
303 uh_ubus_send_header(cl
);
304 ops
->chunk_printf(cl
, "[\n\t");
307 static void uh_ubus_complete_batch(struct client
*cl
)
309 ops
->chunk_printf(cl
, "\n]\n");
310 ops
->request_done(cl
);
313 static void uh_ubus_allowed_cb(struct ubus_request
*req
, int type
, struct blob_attr
*msg
)
315 struct blob_attr
*tb
[__SES_MAX
];
316 bool *allow
= (bool *)req
->priv
;
321 blobmsg_parse(ses_policy
, __SES_MAX
, tb
, blob_data(msg
), blob_len(msg
));
324 *allow
= blobmsg_get_bool(tb
[SES_ACCESS
]);
327 static bool uh_ubus_allowed(const char *sid
, const char *obj
, const char *fun
)
331 static struct blob_buf req
;
333 if (ubus_lookup_id(ctx
, "session", &id
))
336 blob_buf_init(&req
, 0);
337 blobmsg_add_string(&req
, "sid", sid
);
338 blobmsg_add_string(&req
, "object", obj
);
339 blobmsg_add_string(&req
, "function", fun
);
341 ubus_invoke(ctx
, id
, "access", req
.head
, uh_ubus_allowed_cb
, &allow
, 250);
346 static void uh_ubus_handle_request_object(struct client
*cl
, struct json_object
*obj
)
348 struct dispatch_ubus
*du
= &cl
->dispatch
.ubus
;
349 struct rpc_data data
= {};
350 enum rpc_error err
= ERROR_PARSE
;
352 if (json_object_get_type(obj
) != json_type_object
)
356 blob_buf_init(&buf
, 0);
357 if (!blobmsg_add_object(&buf
, obj
))
360 if (!parse_json_rpc(&data
, buf
.head
))
363 if (strcmp(data
.method
, "call") != 0) {
368 du
->func
= data
.function
;
369 if (ubus_lookup_id(ctx
, data
.object
, &du
->obj
)) {
374 if (!uh_ubus_allowed(du
->sid
, data
.object
, data
.function
)) {
379 uh_ubus_send_request(cl
, obj
);
383 uh_ubus_json_error(cl
, err
);
386 static void __uh_ubus_next_batched_request(struct uloop_timeout
*timeout
)
388 struct dispatch_ubus
*du
= container_of(timeout
, struct dispatch_ubus
, timeout
);
389 struct client
*cl
= container_of(du
, struct client
, dispatch
.ubus
);
390 struct json_object
*obj
= du
->jsobj
;
393 len
= json_object_array_length(obj
);
394 if (du
->array_idx
>= len
)
395 return uh_ubus_complete_batch(cl
);
397 obj
= json_object_array_get_idx(obj
, du
->array_idx
++);
398 uh_ubus_handle_request_object(cl
, obj
);
401 static void uh_ubus_data_done(struct client
*cl
)
403 struct dispatch_ubus
*du
= &cl
->dispatch
.ubus
;
404 struct json_object
*obj
= du
->jsobj
;
406 switch (obj
? json_object_get_type(obj
) : json_type_null
) {
407 case json_type_object
:
408 uh_ubus_send_header(cl
);
409 return uh_ubus_handle_request_object(cl
, obj
);
410 case json_type_array
:
411 uh_ubus_init_batch(cl
);
412 if (json_object_array_length(obj
) > 0)
413 return uh_ubus_next_batched_request(cl
);
416 return uh_ubus_single_error(cl
, ERROR_PARSE
);
420 static int uh_ubus_data_send(struct client
*cl
, const char *data
, int len
)
422 struct dispatch_ubus
*du
= &cl
->dispatch
.ubus
;
424 if (du
->jsobj
|| !du
->jstok
)
428 if (du
->post_len
> UH_UBUS_MAX_POST_SIZE
)
431 du
->jsobj
= json_tokener_parse_ex(du
->jstok
, data
, len
);
435 uh_ubus_single_error(cl
, ERROR_PARSE
);
439 static void uh_ubus_handle_request(struct client
*cl
, char *url
, struct path_info
*pi
)
441 struct dispatch
*d
= &cl
->dispatch
;
444 blob_buf_init(&buf
, 0);
446 url
+= strlen(conf
.ubus_prefix
);
450 sep
= strchr(url
, '/');
455 if (strlen(sid
) != 32 ||
456 cl
->request
.method
!= UH_HTTP_MSG_POST
)
457 return ops
->client_error(cl
, 400, "Bad Request", "Invalid Request");
459 d
->close_fds
= uh_ubus_close_fds
;
460 d
->free
= uh_ubus_request_free
;
461 d
->data_send
= uh_ubus_data_send
;
462 d
->data_done
= uh_ubus_data_done
;
463 d
->ubus
.jstok
= json_tokener_new();
468 uh_ubus_check_url(const char *url
)
470 return ops
->path_match(conf
.ubus_prefix
, url
);
476 static struct dispatch_handler ubus_dispatch
= {
477 .check_url
= uh_ubus_check_url
,
478 .handle_request
= uh_ubus_handle_request
,
481 ctx
= ubus_connect(conf
.ubus_socket
);
483 fprintf(stderr
, "Unable to connect to ubus socket\n");
487 ops
->dispatch_add(&ubus_dispatch
);
494 static int uh_ubus_plugin_init(const struct uhttpd_ops
*o
, struct config
*c
)
498 return uh_ubus_init();
501 static void uh_ubus_post_init(void)
506 const struct uhttpd_plugin uhttpd_plugin
= {
507 .init
= uh_ubus_plugin_init
,
508 .post_init
= uh_ubus_post_init
,