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.
22 #define BLOBMSG_ALIGN 2
23 #define BLOBMSG_PADDING(len) (((len) + (1 << BLOBMSG_ALIGN) - 1) & ~((1 << BLOBMSG_ALIGN) - 1))
35 BLOBMSG_TYPE_LAST
= __BLOBMSG_TYPE_LAST
- 1,
36 BLOBMSG_TYPE_BOOL
= BLOBMSG_TYPE_INT8
,
44 struct blobmsg_policy
{
46 enum blobmsg_type type
;
49 static inline int blobmsg_hdrlen(unsigned int namelen
)
51 return BLOBMSG_PADDING(sizeof(struct blobmsg_hdr
) + namelen
+ 1);
54 static inline void blobmsg_clear_name(struct blob_attr
*attr
)
56 struct blobmsg_hdr
*hdr
= (struct blobmsg_hdr
*) blob_data(attr
);
60 static inline const char *blobmsg_name(const struct blob_attr
*attr
)
62 struct blobmsg_hdr
*hdr
= (struct blobmsg_hdr
*) blob_data(attr
);
63 return (const char *) hdr
->name
;
66 static inline int blobmsg_type(const struct blob_attr
*attr
)
71 static inline void *blobmsg_data(const struct blob_attr
*attr
)
73 struct blobmsg_hdr
*hdr
= (struct blobmsg_hdr
*) blob_data(attr
);
74 char *data
= (char *) blob_data(attr
);
76 if (blob_is_extended(attr
))
77 data
+= blobmsg_hdrlen(be16_to_cpu(hdr
->namelen
));
82 static inline int blobmsg_data_len(const struct blob_attr
*attr
)
86 start
= (uint8_t *) blob_data(attr
);
87 end
= (uint8_t *) blobmsg_data(attr
);
89 return blob_len(attr
) - (end
- start
);
92 static inline int blobmsg_len(const struct blob_attr
*attr
)
94 return blobmsg_data_len(attr
);
97 bool blobmsg_check_attr(const struct blob_attr
*attr
, bool name
);
98 bool blobmsg_check_attr_list(const struct blob_attr
*attr
, int type
);
101 * blobmsg_check_array: validate array/table and return size
103 * Checks if all elements of an array or table are valid and have
104 * the specified type. Returns the number of elements in the array
106 int blobmsg_check_array(const struct blob_attr
*attr
, int type
);
108 int blobmsg_parse(const struct blobmsg_policy
*policy
, int policy_len
,
109 struct blob_attr
**tb
, void *data
, unsigned int len
);
110 int blobmsg_parse_array(const struct blobmsg_policy
*policy
, int policy_len
,
111 struct blob_attr
**tb
, void *data
, unsigned int len
);
113 int blobmsg_add_field(struct blob_buf
*buf
, int type
, const char *name
,
114 const void *data
, unsigned int len
);
117 blobmsg_add_u8(struct blob_buf
*buf
, const char *name
, uint8_t val
)
119 return blobmsg_add_field(buf
, BLOBMSG_TYPE_INT8
, name
, &val
, 1);
123 blobmsg_add_u16(struct blob_buf
*buf
, const char *name
, uint16_t val
)
125 val
= cpu_to_be16(val
);
126 return blobmsg_add_field(buf
, BLOBMSG_TYPE_INT16
, name
, &val
, 2);
130 blobmsg_add_u32(struct blob_buf
*buf
, const char *name
, uint32_t val
)
132 val
= cpu_to_be32(val
);
133 return blobmsg_add_field(buf
, BLOBMSG_TYPE_INT32
, name
, &val
, 4);
137 blobmsg_add_u64(struct blob_buf
*buf
, const char *name
, uint64_t val
)
139 val
= cpu_to_be64(val
);
140 return blobmsg_add_field(buf
, BLOBMSG_TYPE_INT64
, name
, &val
, 8);
144 blobmsg_add_string(struct blob_buf
*buf
, const char *name
, const char *string
)
146 return blobmsg_add_field(buf
, BLOBMSG_TYPE_STRING
, name
, string
, strlen(string
) + 1);
150 blobmsg_add_blob(struct blob_buf
*buf
, struct blob_attr
*attr
)
152 return blobmsg_add_field(buf
, blobmsg_type(attr
), blobmsg_name(attr
),
153 blobmsg_data(attr
), blobmsg_data_len(attr
));
156 void *blobmsg_open_nested(struct blob_buf
*buf
, const char *name
, bool array
);
159 blobmsg_open_array(struct blob_buf
*buf
, const char *name
)
161 return blobmsg_open_nested(buf
, name
, true);
165 blobmsg_open_table(struct blob_buf
*buf
, const char *name
)
167 return blobmsg_open_nested(buf
, name
, false);
171 blobmsg_close_array(struct blob_buf
*buf
, void *cookie
)
173 blob_nest_end(buf
, cookie
);
177 blobmsg_close_table(struct blob_buf
*buf
, void *cookie
)
179 blob_nest_end(buf
, cookie
);
182 static inline int blobmsg_buf_init(struct blob_buf
*buf
)
184 return blob_buf_init(buf
, BLOBMSG_TYPE_TABLE
);
187 static inline uint8_t blobmsg_get_u8(struct blob_attr
*attr
)
189 return *(uint8_t *) blobmsg_data(attr
);
192 static inline bool blobmsg_get_bool(struct blob_attr
*attr
)
194 return *(uint8_t *) blobmsg_data(attr
);
197 static inline uint16_t blobmsg_get_u16(struct blob_attr
*attr
)
199 return be16_to_cpu(*(uint16_t *) blobmsg_data(attr
));
202 static inline uint32_t blobmsg_get_u32(struct blob_attr
*attr
)
204 return be32_to_cpu(*(uint32_t *) blobmsg_data(attr
));
207 static inline uint64_t blobmsg_get_u64(struct blob_attr
*attr
)
209 uint32_t *ptr
= (uint32_t *) blobmsg_data(attr
);
210 uint64_t tmp
= ((uint64_t) be32_to_cpu(ptr
[0])) << 32;
211 tmp
|= be32_to_cpu(ptr
[1]);
215 static inline char *blobmsg_get_string(struct blob_attr
*attr
)
217 return (char *) blobmsg_data(attr
);
220 void *blobmsg_alloc_string_buffer(struct blob_buf
*buf
, const char *name
, unsigned int maxlen
);
221 void *blobmsg_realloc_string_buffer(struct blob_buf
*buf
, unsigned int maxlen
);
222 void blobmsg_add_string_buffer(struct blob_buf
*buf
);
224 void blobmsg_vprintf(struct blob_buf
*buf
, const char *name
, const char *format
, va_list arg
);
225 void blobmsg_printf(struct blob_buf
*buf
, const char *name
, const char *format
, ...)
226 __attribute__((format(printf
, 3, 4)));
229 /* blobmsg to json formatting */
231 #define blobmsg_for_each_attr(pos, attr, rem) \
232 for (rem = attr ? blobmsg_data_len(attr) : 0, \
233 pos = attr ? blobmsg_data(attr) : 0; \
234 rem > 0 && (blob_pad_len(pos) <= rem) && \
235 (blob_pad_len(pos) >= sizeof(struct blob_attr)); \
236 rem -= blob_pad_len(pos), pos = blob_next(pos))