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 if (len
> blob_raw_len(attr
))
59 data
= blobmsg_data(attr
);
61 if (id
> BLOBMSG_TYPE_LAST
)
67 return blob_check_type(data
, len
, blob_type
[id
]);
70 int blobmsg_check_array(const struct blob_attr
*attr
, int type
)
72 struct blob_attr
*cur
;
77 switch (blobmsg_type(attr
)) {
78 case BLOBMSG_TYPE_TABLE
:
81 case BLOBMSG_TYPE_ARRAY
:
88 blobmsg_for_each_attr(cur
, attr
, rem
) {
89 if (type
!= BLOBMSG_TYPE_UNSPEC
&& blobmsg_type(cur
) != type
)
92 if (!blobmsg_check_attr(cur
, name
))
101 bool blobmsg_check_attr_list(const struct blob_attr
*attr
, int type
)
103 return blobmsg_check_array(attr
, type
) >= 0;
106 int blobmsg_parse_array(const struct blobmsg_policy
*policy
, int policy_len
,
107 struct blob_attr
**tb
, void *data
, unsigned int len
)
109 struct blob_attr
*attr
;
112 memset(tb
, 0, policy_len
* sizeof(*tb
));
113 __blob_for_each_attr(attr
, data
, len
) {
114 if (policy
[i
].type
!= BLOBMSG_TYPE_UNSPEC
&&
115 blob_id(attr
) != policy
[i
].type
)
118 if (!blobmsg_check_attr(attr
, false))
133 int blobmsg_parse(const struct blobmsg_policy
*policy
, int policy_len
,
134 struct blob_attr
**tb
, void *data
, unsigned int len
)
136 struct blobmsg_hdr
*hdr
;
137 struct blob_attr
*attr
;
141 memset(tb
, 0, policy_len
* sizeof(*tb
));
144 pslen
= alloca(policy_len
);
145 for (i
= 0; i
< policy_len
; i
++) {
149 pslen
[i
] = strlen(policy
[i
].name
);
152 __blob_for_each_attr(attr
, data
, len
) {
153 hdr
= blob_data(attr
);
154 for (i
= 0; i
< policy_len
; i
++) {
158 if (policy
[i
].type
!= BLOBMSG_TYPE_UNSPEC
&&
159 blob_id(attr
) != policy
[i
].type
)
162 if (blobmsg_namelen(hdr
) != pslen
[i
])
165 if (!blobmsg_check_attr(attr
, true))
171 if (strcmp(policy
[i
].name
, (char *) hdr
->name
) != 0)
182 static struct blob_attr
*
183 blobmsg_new(struct blob_buf
*buf
, int type
, const char *name
, int payload_len
, void **data
)
185 struct blob_attr
*attr
;
186 struct blobmsg_hdr
*hdr
;
187 int attrlen
, namelen
;
188 char *pad_start
, *pad_end
;
193 namelen
= strlen(name
);
194 attrlen
= blobmsg_hdrlen(namelen
) + payload_len
;
195 attr
= blob_new(buf
, type
, attrlen
);
199 attr
->id_len
|= be32_to_cpu(BLOB_ATTR_EXTENDED
);
200 hdr
= blob_data(attr
);
201 hdr
->namelen
= cpu_to_be16(namelen
);
202 strcpy((char *) hdr
->name
, (const char *)name
);
203 pad_end
= *data
= blobmsg_data(attr
);
204 pad_start
= (char *) &hdr
->name
[namelen
];
205 if (pad_start
< pad_end
)
206 memset(pad_start
, 0, pad_end
- pad_start
);
212 attr_to_offset(struct blob_buf
*buf
, struct blob_attr
*attr
)
214 return (char *)attr
- (char *) buf
->buf
+ BLOB_COOKIE
;
219 blobmsg_open_nested(struct blob_buf
*buf
, const char *name
, bool array
)
221 struct blob_attr
*head
;
222 int type
= array
? BLOBMSG_TYPE_ARRAY
: BLOBMSG_TYPE_TABLE
;
223 unsigned long offset
= attr_to_offset(buf
, buf
->head
);
229 head
= blobmsg_new(buf
, type
, name
, 0, &data
);
232 blob_set_raw_len(buf
->head
, blob_pad_len(buf
->head
) - blobmsg_hdrlen(strlen(name
)));
234 return (void *)offset
;
237 __attribute__((format(printf
, 3, 0)))
238 int blobmsg_vprintf(struct blob_buf
*buf
, const char *name
, const char *format
, va_list arg
)
246 len
= vsnprintf(&cbuf
, sizeof(cbuf
), format
, arg2
);
249 sbuf
= blobmsg_alloc_string_buffer(buf
, name
, len
+ 1);
252 ret
= vsprintf(sbuf
, format
, arg
);
253 blobmsg_add_string_buffer(buf
);
258 __attribute__((format(printf
, 3, 4)))
259 int blobmsg_printf(struct blob_buf
*buf
, const char *name
, const char *format
, ...)
264 va_start(ap
, format
);
265 ret
= blobmsg_vprintf(buf
, name
, format
, ap
);
272 blobmsg_alloc_string_buffer(struct blob_buf
*buf
, const char *name
, unsigned int maxlen
)
274 struct blob_attr
*attr
;
277 attr
= blobmsg_new(buf
, BLOBMSG_TYPE_STRING
, name
, maxlen
, &data_dest
);
281 blob_set_raw_len(buf
->head
, blob_pad_len(buf
->head
) - blob_pad_len(attr
));
282 blob_set_raw_len(attr
, blob_raw_len(attr
) - maxlen
);
288 blobmsg_realloc_string_buffer(struct blob_buf
*buf
, unsigned int maxlen
)
290 struct blob_attr
*attr
= blob_next(buf
->head
);
291 int offset
= attr_to_offset(buf
, blob_next(buf
->head
)) + blob_pad_len(attr
) - BLOB_COOKIE
;
292 int required
= maxlen
- (buf
->buflen
- offset
);
297 if (!blob_buf_grow(buf
, required
))
299 attr
= blob_next(buf
->head
);
302 return blobmsg_data(attr
);
306 blobmsg_add_string_buffer(struct blob_buf
*buf
)
308 struct blob_attr
*attr
;
311 attr
= blob_next(buf
->head
);
312 len
= strlen(blobmsg_data(attr
)) + 1;
314 attrlen
= blob_raw_len(attr
) + len
;
315 blob_set_raw_len(attr
, attrlen
);
318 blob_set_raw_len(buf
->head
, blob_raw_len(buf
->head
) + blob_pad_len(attr
));
322 blobmsg_add_field(struct blob_buf
*buf
, int type
, const char *name
,
323 const void *data
, unsigned int len
)
325 struct blob_attr
*attr
;
328 attr
= blobmsg_new(buf
, type
, name
, len
, &data_dest
);
333 memcpy(data_dest
, data
, len
);