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_STRING
] = BLOB_ATTR_STRING
,
27 blobmsg_namelen(const struct blobmsg_hdr
*hdr
)
29 return be16_to_cpu(hdr
->namelen
);
32 bool blobmsg_check_attr(const struct blob_attr
*attr
, bool name
)
34 const struct blobmsg_hdr
*hdr
;
38 if (blob_len(attr
) < sizeof(struct blobmsg_hdr
))
41 hdr
= (void *) attr
->data
;
42 if (!hdr
->namelen
&& name
)
45 if (blobmsg_namelen(hdr
) > blob_len(attr
) - sizeof(struct blobmsg_hdr
))
48 if (hdr
->name
[blobmsg_namelen(hdr
)] != 0)
52 len
= blobmsg_data_len(attr
);
53 data
= blobmsg_data(attr
);
55 if (!id
|| id
> BLOBMSG_TYPE_LAST
)
61 return blob_check_type(data
, len
, blob_type
[id
]);
64 int blobmsg_parse(const struct blobmsg_policy
*policy
, int policy_len
,
65 struct blob_attr
**tb
, void *data
, int len
)
67 struct blobmsg_hdr
*hdr
;
68 struct blob_attr
*attr
;
72 memset(tb
, 0, policy_len
* sizeof(*tb
));
73 pslen
= alloca(policy_len
);
74 for (i
= 0; i
< policy_len
; i
++) {
78 pslen
[i
] = strlen(policy
[i
].name
);
81 __blob_for_each_attr(attr
, data
, len
) {
82 hdr
= blob_data(attr
);
83 for (i
= 0; i
< policy_len
; i
++) {
87 if (policy
[i
].type
!= BLOBMSG_TYPE_UNSPEC
&&
88 blob_id(attr
) != policy
[i
].type
)
91 if (blobmsg_namelen(hdr
) != pslen
[i
])
94 if (!blobmsg_check_attr(attr
, true))
100 if (strcmp(policy
[i
].name
, (char *) hdr
->name
) != 0)
111 static struct blob_attr
*
112 blobmsg_new(struct blob_buf
*buf
, int type
, const char *name
, int payload_len
, void **data
)
114 struct blob_attr
*attr
;
115 struct blobmsg_hdr
*hdr
;
116 int attrlen
, namelen
;
117 char *pad_start
, *pad_end
;
122 namelen
= strlen(name
);
123 attrlen
= blobmsg_hdrlen(namelen
) + payload_len
;
124 attr
= blob_new(buf
, type
, attrlen
);
128 hdr
= blob_data(attr
);
129 hdr
->namelen
= cpu_to_be16(namelen
);
130 strcpy((char *) hdr
->name
, (const char *)name
);
131 pad_end
= *data
= blobmsg_data(attr
);
132 pad_start
= (char *) &hdr
->name
[namelen
];
133 if (pad_start
< pad_end
)
134 memset(pad_start
, 0, pad_end
- pad_start
);
140 attr_to_offset(struct blob_buf
*buf
, struct blob_attr
*attr
)
142 return (char *)attr
- (char *) buf
->buf
;
147 blobmsg_open_nested(struct blob_buf
*buf
, const char *name
, bool array
)
149 struct blob_attr
*head
= buf
->head
;
150 int type
= array
? BLOBMSG_TYPE_ARRAY
: BLOBMSG_TYPE_TABLE
;
151 unsigned long offset
= attr_to_offset(buf
, buf
->head
);
157 head
= blobmsg_new(buf
, type
, name
, 0, &data
);
158 blob_set_raw_len(buf
->head
, blob_pad_len(buf
->head
) - blobmsg_hdrlen(strlen(name
)));
160 return (void *)offset
;
164 blobmsg_alloc_string_buffer(struct blob_buf
*buf
, const char *name
, int maxlen
)
166 struct blob_attr
*attr
;
169 attr
= blobmsg_new(buf
, BLOBMSG_TYPE_STRING
, name
, maxlen
, &data_dest
);
173 data_dest
= blobmsg_data(attr
);
174 blob_set_raw_len(buf
->head
, blob_pad_len(buf
->head
) - blob_pad_len(attr
));
175 blob_set_raw_len(attr
, blob_raw_len(attr
) - maxlen
);
181 blobmsg_add_string_buffer(struct blob_buf
*buf
)
183 struct blob_attr
*attr
;
186 attr
= blob_next(buf
->head
);
187 len
= strlen(blobmsg_data(attr
)) + 1;
189 attrlen
= blob_raw_len(attr
) + len
;
190 blob_set_raw_len(attr
, attrlen
);
193 blob_set_raw_len(buf
->head
, blob_raw_len(buf
->head
) + blob_pad_len(attr
));
197 blobmsg_add_field(struct blob_buf
*buf
, int type
, const char *name
,
198 const void *data
, int len
)
200 struct blob_attr
*attr
;
203 attr
= blobmsg_new(buf
, type
, name
, len
, &data_dest
);
208 memcpy(data_dest
, data
, len
);