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.
21 #define BLOBMSG_ALIGN 2
22 #define BLOBMSG_PADDING(len) (((len) + (1 << BLOBMSG_ALIGN) - 1) & ~((1 << BLOBMSG_ALIGN) - 1))
34 BLOBMSG_TYPE_LAST
= __BLOBMSG_TYPE_LAST
- 1,
35 BLOBMSG_TYPE_BOOL
= BLOBMSG_TYPE_INT8
,
43 struct blobmsg_policy
{
45 enum blobmsg_type type
;
48 static inline int blobmsg_hdrlen(int namelen
)
50 return BLOBMSG_PADDING(sizeof(struct blobmsg_hdr
) + namelen
+ 1);
53 static inline const char *blobmsg_name(const struct blob_attr
*attr
)
55 struct blobmsg_hdr
*hdr
= (struct blobmsg_hdr
*) blob_data(attr
);
56 return (const char *) hdr
->name
;
59 static inline int blobmsg_type(const struct blob_attr
*attr
)
64 static inline void *blobmsg_data(const struct blob_attr
*attr
)
66 struct blobmsg_hdr
*hdr
= (struct blobmsg_hdr
*) blob_data(attr
);
67 return (char *) hdr
+ blobmsg_hdrlen(be16_to_cpu(hdr
->namelen
));
70 static inline int blobmsg_data_len(const struct blob_attr
*attr
)
74 start
= (uint8_t *) blob_data(attr
);
75 end
= (uint8_t *) blobmsg_data(attr
);
77 return blob_len(attr
) - (end
- start
);
80 bool blobmsg_check_attr(const struct blob_attr
*attr
, bool name
);
81 int blobmsg_parse(const struct blobmsg_policy
*policy
, int policy_len
,
82 struct blob_attr
**tb
, void *data
, int len
);
84 int blobmsg_add_field(struct blob_buf
*buf
, int type
, const char *name
,
85 const void *data
, int len
);
88 blobmsg_add_u8(struct blob_buf
*buf
, const char *name
, uint8_t val
)
90 return blobmsg_add_field(buf
, BLOBMSG_TYPE_INT8
, name
, &val
, 1);
94 blobmsg_add_u16(struct blob_buf
*buf
, const char *name
, uint16_t val
)
96 val
= cpu_to_be16(val
);
97 return blobmsg_add_field(buf
, BLOBMSG_TYPE_INT16
, name
, &val
, 2);
101 blobmsg_add_u32(struct blob_buf
*buf
, const char *name
, uint32_t val
)
103 val
= cpu_to_be32(val
);
104 return blobmsg_add_field(buf
, BLOBMSG_TYPE_INT32
, name
, &val
, 4);
108 blobmsg_add_u64(struct blob_buf
*buf
, const char *name
, uint64_t val
)
110 val
= cpu_to_be64(val
);
111 return blobmsg_add_field(buf
, BLOBMSG_TYPE_INT64
, name
, &val
, 8);
115 blobmsg_add_string(struct blob_buf
*buf
, const char *name
, const char *string
)
117 return blobmsg_add_field(buf
, BLOBMSG_TYPE_STRING
, name
, string
, strlen(string
) + 1);
121 blobmsg_add_blob(struct blob_buf
*buf
, struct blob_attr
*attr
)
123 return blobmsg_add_field(buf
, blobmsg_type(attr
), blobmsg_name(attr
),
124 blobmsg_data(attr
), blobmsg_data_len(attr
));
127 void *blobmsg_open_nested(struct blob_buf
*buf
, const char *name
, bool array
);
130 blobmsg_open_array(struct blob_buf
*buf
, const char *name
)
132 return blobmsg_open_nested(buf
, name
, true);
136 blobmsg_open_table(struct blob_buf
*buf
, const char *name
)
138 return blobmsg_open_nested(buf
, name
, false);
142 blobmsg_close_array(struct blob_buf
*buf
, void *cookie
)
144 blob_nest_end(buf
, cookie
);
148 blobmsg_close_table(struct blob_buf
*buf
, void *cookie
)
150 blob_nest_end(buf
, cookie
);
153 static inline int blobmsg_buf_init(struct blob_buf
*buf
)
155 return blob_buf_init(buf
, BLOBMSG_TYPE_TABLE
);
158 static inline uint8_t blobmsg_get_u8(struct blob_attr
*attr
)
160 return *(uint8_t *) blobmsg_data(attr
);
163 static inline bool blobmsg_get_bool(struct blob_attr
*attr
)
165 return *(uint8_t *) blobmsg_data(attr
);
168 static inline uint16_t blobmsg_get_u16(struct blob_attr
*attr
)
170 return be16_to_cpu(*(uint16_t *) blobmsg_data(attr
));
173 static inline uint32_t blobmsg_get_u32(struct blob_attr
*attr
)
175 return be32_to_cpu(*(uint32_t *) blobmsg_data(attr
));
178 static inline uint64_t blobmsg_get_u64(struct blob_attr
*attr
)
180 return be64_to_cpu(*(uint64_t *) blobmsg_data(attr
));
183 void *blobmsg_alloc_string_buffer(struct blob_buf
*buf
, const char *name
, int maxlen
);
184 void blobmsg_add_string_buffer(struct blob_buf
*buf
);
186 /* blobmsg to json formatting */
188 #define blobmsg_for_each_attr(pos, attr, rem) \
189 for (rem = blobmsg_data_len(attr), pos = blobmsg_data(attr); \
190 rem > 0 && (blob_pad_len(pos) <= rem) && \
191 (blob_pad_len(pos) >= sizeof(struct blob_attr)); \
192 rem -= blob_pad_len(pos), pos = blob_next(pos))