1dd57e156122ec06d1797f9a17fb10938c2fc356
2 * Copyright (C) 2010-2012 Felix Fietkau <nbd@openwrt.org>
4 * Permission to use, copy, modify, and/or distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18 static const int blob_type
[__BLOBMSG_TYPE_LAST
] = {
19 [BLOBMSG_TYPE_INT8
] = BLOB_ATTR_INT8
,
20 [BLOBMSG_TYPE_INT16
] = BLOB_ATTR_INT16
,
21 [BLOBMSG_TYPE_INT32
] = BLOB_ATTR_INT32
,
22 [BLOBMSG_TYPE_INT64
] = BLOB_ATTR_INT64
,
23 [BLOBMSG_TYPE_DOUBLE
] = BLOB_ATTR_DOUBLE
,
24 [BLOBMSG_TYPE_STRING
] = BLOB_ATTR_STRING
,
25 [BLOBMSG_TYPE_UNSPEC
] = BLOB_ATTR_BINARY
,
28 bool blobmsg_check_attr(const struct blob_attr
*attr
, bool name
)
30 return blobmsg_check_attr_len(attr
, name
, blob_raw_len(attr
));
33 static bool blobmsg_check_name(const struct blob_attr
*attr
, size_t len
, bool name
)
35 char *limit
= (char *) attr
+ len
;
36 const struct blobmsg_hdr
*hdr
;
38 hdr
= blob_data(attr
);
39 if (name
&& !hdr
->namelen
)
42 if ((char *) hdr
->name
+ blobmsg_namelen(hdr
) > limit
)
45 if (blobmsg_namelen(hdr
) > (blob_len(attr
) - sizeof(struct blobmsg_hdr
)))
48 if (hdr
->name
[blobmsg_namelen(hdr
)] != 0)
54 static const char* blobmsg_check_data(const struct blob_attr
*attr
, size_t len
, size_t *data_len
)
56 char *limit
= (char *) attr
+ len
;
59 *data_len
= blobmsg_data_len(attr
);
60 if (*data_len
> blob_raw_len(attr
))
63 data
= blobmsg_data(attr
);
64 if (data
+ *data_len
> limit
)
70 bool blobmsg_check_attr_len(const struct blob_attr
*attr
, bool name
, size_t len
)
76 if (len
< sizeof(struct blob_attr
))
79 if (!blobmsg_check_name(attr
, len
, name
))
83 if (id
> BLOBMSG_TYPE_LAST
)
89 data
= blobmsg_check_data(attr
, len
, &data_len
);
93 return blob_check_type(data
, data_len
, blob_type
[id
]);
96 int blobmsg_check_array(const struct blob_attr
*attr
, int type
)
98 return blobmsg_check_array_len(attr
, type
, blobmsg_len(attr
));
101 int blobmsg_check_array_len(const struct blob_attr
*attr
, int type
, size_t len
)
103 struct blob_attr
*cur
;
107 if (type
> BLOBMSG_TYPE_LAST
)
110 if (!blobmsg_check_attr_len(attr
, false, len
))
113 switch (blobmsg_type(attr
)) {
114 case BLOBMSG_TYPE_TABLE
:
117 case BLOBMSG_TYPE_ARRAY
:
124 __blobmsg_for_each_attr(cur
, attr
, len
) {
125 if (type
!= BLOBMSG_TYPE_UNSPEC
&& blobmsg_type(cur
) != type
)
128 if (!blobmsg_check_attr_len(cur
, name
, len
))
137 bool blobmsg_check_attr_list(const struct blob_attr
*attr
, int type
)
139 return blobmsg_check_array(attr
, type
) >= 0;
142 bool blobmsg_check_attr_list_len(const struct blob_attr
*attr
, int type
, size_t len
)
144 return blobmsg_check_array_len(attr
, type
, len
) >= 0;
147 int blobmsg_parse_array(const struct blobmsg_policy
*policy
, int policy_len
,
148 struct blob_attr
**tb
, void *data
, unsigned int len
)
150 struct blob_attr
*attr
;
153 memset(tb
, 0, policy_len
* sizeof(*tb
));
154 __blob_for_each_attr(attr
, data
, len
) {
155 if (policy
[i
].type
!= BLOBMSG_TYPE_UNSPEC
&&
156 blob_id(attr
) != policy
[i
].type
)
159 if (!blobmsg_check_attr_len(attr
, false, len
))
174 int blobmsg_parse(const struct blobmsg_policy
*policy
, int policy_len
,
175 struct blob_attr
**tb
, void *data
, unsigned int len
)
177 struct blobmsg_hdr
*hdr
;
178 struct blob_attr
*attr
;
182 memset(tb
, 0, policy_len
* sizeof(*tb
));
185 pslen
= alloca(policy_len
);
186 for (i
= 0; i
< policy_len
; i
++) {
190 pslen
[i
] = strlen(policy
[i
].name
);
193 __blob_for_each_attr(attr
, data
, len
) {
194 hdr
= blob_data(attr
);
195 for (i
= 0; i
< policy_len
; i
++) {
199 if (policy
[i
].type
!= BLOBMSG_TYPE_UNSPEC
&&
200 blob_id(attr
) != policy
[i
].type
)
203 if (blobmsg_namelen(hdr
) != pslen
[i
])
206 if (!blobmsg_check_attr_len(attr
, true, len
))
212 if (strcmp(policy
[i
].name
, (char *) hdr
->name
) != 0)
223 static struct blob_attr
*
224 blobmsg_new(struct blob_buf
*buf
, int type
, const char *name
, int payload_len
, void **data
)
226 struct blob_attr
*attr
;
227 struct blobmsg_hdr
*hdr
;
228 int attrlen
, namelen
;
229 char *pad_start
, *pad_end
;
234 namelen
= strlen(name
);
235 attrlen
= blobmsg_hdrlen(namelen
) + payload_len
;
236 attr
= blob_new(buf
, type
, attrlen
);
240 attr
->id_len
|= be32_to_cpu(BLOB_ATTR_EXTENDED
);
241 hdr
= blob_data(attr
);
242 hdr
->namelen
= cpu_to_be16(namelen
);
244 memcpy(hdr
->name
, name
, namelen
);
245 hdr
->name
[namelen
] = '\0';
247 pad_end
= *data
= blobmsg_data(attr
);
248 pad_start
= (char *) &hdr
->name
[namelen
];
249 if (pad_start
< pad_end
)
250 memset(pad_start
, 0, pad_end
- pad_start
);
256 attr_to_offset(struct blob_buf
*buf
, struct blob_attr
*attr
)
258 return (char *)attr
- (char *) buf
->buf
+ BLOB_COOKIE
;
263 blobmsg_open_nested(struct blob_buf
*buf
, const char *name
, bool array
)
265 struct blob_attr
*head
;
266 int type
= array
? BLOBMSG_TYPE_ARRAY
: BLOBMSG_TYPE_TABLE
;
267 unsigned long offset
= attr_to_offset(buf
, buf
->head
);
273 head
= blobmsg_new(buf
, type
, name
, 0, &data
);
276 blob_set_raw_len(buf
->head
, blob_pad_len(buf
->head
) - blobmsg_hdrlen(strlen(name
)));
278 return (void *)offset
;
281 __attribute__((format(printf
, 3, 0)))
282 int blobmsg_vprintf(struct blob_buf
*buf
, const char *name
, const char *format
, va_list arg
)
290 len
= vsnprintf(&cbuf
, sizeof(cbuf
), format
, arg2
);
293 sbuf
= blobmsg_alloc_string_buffer(buf
, name
, len
+ 1);
296 ret
= vsprintf(sbuf
, format
, arg
);
297 blobmsg_add_string_buffer(buf
);
302 __attribute__((format(printf
, 3, 4)))
303 int blobmsg_printf(struct blob_buf
*buf
, const char *name
, const char *format
, ...)
308 va_start(ap
, format
);
309 ret
= blobmsg_vprintf(buf
, name
, format
, ap
);
316 blobmsg_alloc_string_buffer(struct blob_buf
*buf
, const char *name
, unsigned int maxlen
)
318 struct blob_attr
*attr
;
321 attr
= blobmsg_new(buf
, BLOBMSG_TYPE_STRING
, name
, maxlen
, &data_dest
);
325 blob_set_raw_len(buf
->head
, blob_pad_len(buf
->head
) - blob_pad_len(attr
));
326 blob_set_raw_len(attr
, blob_raw_len(attr
) - maxlen
);
332 blobmsg_realloc_string_buffer(struct blob_buf
*buf
, unsigned int maxlen
)
334 struct blob_attr
*attr
= blob_next(buf
->head
);
335 int offset
= attr_to_offset(buf
, blob_next(buf
->head
)) + blob_pad_len(attr
) - BLOB_COOKIE
;
336 int required
= maxlen
- (buf
->buflen
- offset
);
341 if (!blob_buf_grow(buf
, required
))
343 attr
= blob_next(buf
->head
);
346 return blobmsg_data(attr
);
350 blobmsg_add_string_buffer(struct blob_buf
*buf
)
352 struct blob_attr
*attr
;
355 attr
= blob_next(buf
->head
);
356 len
= strlen(blobmsg_data(attr
)) + 1;
358 attrlen
= blob_raw_len(attr
) + len
;
359 blob_set_raw_len(attr
, attrlen
);
362 blob_set_raw_len(buf
->head
, blob_raw_len(buf
->head
) + blob_pad_len(attr
));
366 blobmsg_add_field(struct blob_buf
*buf
, int type
, const char *name
,
367 const void *data
, unsigned int len
)
369 struct blob_attr
*attr
;
372 attr
= blobmsg_new(buf
, type
, name
, len
, &data_dest
);
377 memcpy(data_dest
, data
, len
);