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
,
29 blobmsg_namelen(const struct blobmsg_hdr
*hdr
)
31 return be16_to_cpu(hdr
->namelen
);
34 bool blobmsg_check_attr(const struct blob_attr
*attr
, bool name
)
36 const struct blobmsg_hdr
*hdr
;
41 if (blob_len(attr
) < sizeof(struct blobmsg_hdr
))
44 hdr
= (void *) attr
->data
;
45 if (!hdr
->namelen
&& name
)
48 if (blobmsg_namelen(hdr
) > blob_len(attr
) - sizeof(struct blobmsg_hdr
))
51 if (hdr
->name
[blobmsg_namelen(hdr
)] != 0)
55 len
= blobmsg_data_len(attr
);
56 data
= blobmsg_data(attr
);
58 if (id
> BLOBMSG_TYPE_LAST
)
64 return blob_check_type(data
, len
, blob_type
[id
]);
67 int blobmsg_check_array(const struct blob_attr
*attr
, int type
)
69 struct blob_attr
*cur
;
74 switch (blobmsg_type(attr
)) {
75 case BLOBMSG_TYPE_TABLE
:
78 case BLOBMSG_TYPE_ARRAY
:
85 blobmsg_for_each_attr(cur
, attr
, rem
) {
86 if (type
!= BLOBMSG_TYPE_UNSPEC
&& blobmsg_type(cur
) != type
)
89 if (!blobmsg_check_attr(cur
, name
))
98 bool blobmsg_check_attr_list(const struct blob_attr
*attr
, int type
)
100 return blobmsg_check_array(attr
, type
) >= 0;
103 int blobmsg_parse_array(const struct blobmsg_policy
*policy
, int policy_len
,
104 struct blob_attr
**tb
, void *data
, unsigned int len
)
106 struct blob_attr
*attr
;
109 memset(tb
, 0, policy_len
* sizeof(*tb
));
110 __blob_for_each_attr(attr
, data
, len
) {
111 if (policy
[i
].type
!= BLOBMSG_TYPE_UNSPEC
&&
112 blob_id(attr
) != policy
[i
].type
)
115 if (!blobmsg_check_attr(attr
, false))
130 int blobmsg_parse(const struct blobmsg_policy
*policy
, int policy_len
,
131 struct blob_attr
**tb
, void *data
, unsigned int len
)
133 struct blobmsg_hdr
*hdr
;
134 struct blob_attr
*attr
;
138 memset(tb
, 0, policy_len
* sizeof(*tb
));
141 pslen
= alloca(policy_len
);
142 for (i
= 0; i
< policy_len
; i
++) {
146 pslen
[i
] = strlen(policy
[i
].name
);
149 __blob_for_each_attr(attr
, data
, len
) {
150 hdr
= blob_data(attr
);
151 for (i
= 0; i
< policy_len
; i
++) {
155 if (policy
[i
].type
!= BLOBMSG_TYPE_UNSPEC
&&
156 blob_id(attr
) != policy
[i
].type
)
159 if (blobmsg_namelen(hdr
) != pslen
[i
])
162 if (!blobmsg_check_attr(attr
, true))
168 if (strcmp(policy
[i
].name
, (char *) hdr
->name
) != 0)
179 static struct blob_attr
*
180 blobmsg_new(struct blob_buf
*buf
, int type
, const char *name
, int payload_len
, void **data
)
182 struct blob_attr
*attr
;
183 struct blobmsg_hdr
*hdr
;
184 int attrlen
, namelen
;
185 char *pad_start
, *pad_end
;
190 namelen
= strlen(name
);
191 attrlen
= blobmsg_hdrlen(namelen
) + payload_len
;
192 attr
= blob_new(buf
, type
, attrlen
);
196 attr
->id_len
|= be32_to_cpu(BLOB_ATTR_EXTENDED
);
197 hdr
= blob_data(attr
);
198 hdr
->namelen
= cpu_to_be16(namelen
);
199 strcpy((char *) hdr
->name
, (const char *)name
);
200 pad_end
= *data
= blobmsg_data(attr
);
201 pad_start
= (char *) &hdr
->name
[namelen
];
202 if (pad_start
< pad_end
)
203 memset(pad_start
, 0, pad_end
- pad_start
);
209 attr_to_offset(struct blob_buf
*buf
, struct blob_attr
*attr
)
211 return (char *)attr
- (char *) buf
->buf
+ BLOB_COOKIE
;
216 blobmsg_open_nested(struct blob_buf
*buf
, const char *name
, bool array
)
218 struct blob_attr
*head
;
219 int type
= array
? BLOBMSG_TYPE_ARRAY
: BLOBMSG_TYPE_TABLE
;
220 unsigned long offset
= attr_to_offset(buf
, buf
->head
);
226 head
= blobmsg_new(buf
, type
, name
, 0, &data
);
229 blob_set_raw_len(buf
->head
, blob_pad_len(buf
->head
) - blobmsg_hdrlen(strlen(name
)));
231 return (void *)offset
;
234 __attribute__((format(printf
, 3, 0)))
235 int blobmsg_vprintf(struct blob_buf
*buf
, const char *name
, const char *format
, va_list arg
)
243 len
= vsnprintf(&cbuf
, sizeof(cbuf
), format
, arg2
);
246 sbuf
= blobmsg_alloc_string_buffer(buf
, name
, len
+ 1);
249 ret
= vsprintf(sbuf
, format
, arg
);
250 blobmsg_add_string_buffer(buf
);
255 __attribute__((format(printf
, 3, 4)))
256 int blobmsg_printf(struct blob_buf
*buf
, const char *name
, const char *format
, ...)
261 va_start(ap
, format
);
262 ret
= blobmsg_vprintf(buf
, name
, format
, ap
);
269 blobmsg_alloc_string_buffer(struct blob_buf
*buf
, const char *name
, unsigned int maxlen
)
271 struct blob_attr
*attr
;
274 attr
= blobmsg_new(buf
, BLOBMSG_TYPE_STRING
, name
, maxlen
, &data_dest
);
278 blob_set_raw_len(buf
->head
, blob_pad_len(buf
->head
) - blob_pad_len(attr
));
279 blob_set_raw_len(attr
, blob_raw_len(attr
) - maxlen
);
285 blobmsg_realloc_string_buffer(struct blob_buf
*buf
, unsigned int maxlen
)
287 struct blob_attr
*attr
= blob_next(buf
->head
);
288 int offset
= attr_to_offset(buf
, blob_next(buf
->head
)) + blob_pad_len(attr
) - BLOB_COOKIE
;
289 int required
= maxlen
- (buf
->buflen
- offset
);
294 if (!blob_buf_grow(buf
, required
))
296 attr
= blob_next(buf
->head
);
299 return blobmsg_data(attr
);
303 blobmsg_add_string_buffer(struct blob_buf
*buf
)
305 struct blob_attr
*attr
;
308 attr
= blob_next(buf
->head
);
309 len
= strlen(blobmsg_data(attr
)) + 1;
311 attrlen
= blob_raw_len(attr
) + len
;
312 blob_set_raw_len(attr
, attrlen
);
315 blob_set_raw_len(buf
->head
, blob_raw_len(buf
->head
) + blob_pad_len(attr
));
319 blobmsg_add_field(struct blob_buf
*buf
, int type
, const char *name
,
320 const void *data
, unsigned int len
)
322 struct blob_attr
*attr
;
325 attr
= blobmsg_new(buf
, type
, name
, len
, &data_dest
);
330 memcpy(data_dest
, data
, len
);