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 const char *blobmsg_name(const struct blob_attr
*attr
)
56 struct blobmsg_hdr
*hdr
= (struct blobmsg_hdr
*) blob_data(attr
);
57 return (const char *) hdr
->name
;
60 static inline int blobmsg_type(const struct blob_attr
*attr
)
65 static inline void *blobmsg_data(const struct blob_attr
*attr
)
67 struct blobmsg_hdr
*hdr
= (struct blobmsg_hdr
*) blob_data(attr
);
68 char *data
= (char *) blob_data(attr
);
70 if (blob_is_extended(attr
))
71 data
+= blobmsg_hdrlen(be16_to_cpu(hdr
->namelen
));
76 static inline int blobmsg_data_len(const struct blob_attr
*attr
)
80 start
= (uint8_t *) blob_data(attr
);
81 end
= (uint8_t *) blobmsg_data(attr
);
83 return blob_len(attr
) - (end
- start
);
86 static inline int blobmsg_len(const struct blob_attr
*attr
)
88 return blobmsg_data_len(attr
);
91 bool blobmsg_check_attr(const struct blob_attr
*attr
, bool name
);
92 bool blobmsg_check_attr_list(const struct blob_attr
*attr
, int type
);
95 * blobmsg_check_array: validate array/table and return size
97 * Checks if all elements of an array or table are valid and have
98 * the specified type. Returns the number of elements in the array
100 int blobmsg_check_array(const struct blob_attr
*attr
, int type
);
102 int blobmsg_parse(const struct blobmsg_policy
*policy
, int policy_len
,
103 struct blob_attr
**tb
, void *data
, unsigned int len
);
104 int blobmsg_parse_array(const struct blobmsg_policy
*policy
, int policy_len
,
105 struct blob_attr
**tb
, void *data
, unsigned int len
);
107 int blobmsg_add_field(struct blob_buf
*buf
, int type
, const char *name
,
108 const void *data
, unsigned int len
);
111 blobmsg_add_u8(struct blob_buf
*buf
, const char *name
, uint8_t val
)
113 return blobmsg_add_field(buf
, BLOBMSG_TYPE_INT8
, name
, &val
, 1);
117 blobmsg_add_u16(struct blob_buf
*buf
, const char *name
, uint16_t val
)
119 val
= cpu_to_be16(val
);
120 return blobmsg_add_field(buf
, BLOBMSG_TYPE_INT16
, name
, &val
, 2);
124 blobmsg_add_u32(struct blob_buf
*buf
, const char *name
, uint32_t val
)
126 val
= cpu_to_be32(val
);
127 return blobmsg_add_field(buf
, BLOBMSG_TYPE_INT32
, name
, &val
, 4);
131 blobmsg_add_u64(struct blob_buf
*buf
, const char *name
, uint64_t val
)
133 val
= cpu_to_be64(val
);
134 return blobmsg_add_field(buf
, BLOBMSG_TYPE_INT64
, name
, &val
, 8);
138 blobmsg_add_string(struct blob_buf
*buf
, const char *name
, const char *string
)
140 return blobmsg_add_field(buf
, BLOBMSG_TYPE_STRING
, name
, string
, strlen(string
) + 1);
144 blobmsg_add_blob(struct blob_buf
*buf
, struct blob_attr
*attr
)
146 return blobmsg_add_field(buf
, blobmsg_type(attr
), blobmsg_name(attr
),
147 blobmsg_data(attr
), blobmsg_data_len(attr
));
150 void *blobmsg_open_nested(struct blob_buf
*buf
, const char *name
, bool array
);
153 blobmsg_open_array(struct blob_buf
*buf
, const char *name
)
155 return blobmsg_open_nested(buf
, name
, true);
159 blobmsg_open_table(struct blob_buf
*buf
, const char *name
)
161 return blobmsg_open_nested(buf
, name
, false);
165 blobmsg_close_array(struct blob_buf
*buf
, void *cookie
)
167 blob_nest_end(buf
, cookie
);
171 blobmsg_close_table(struct blob_buf
*buf
, void *cookie
)
173 blob_nest_end(buf
, cookie
);
176 static inline int blobmsg_buf_init(struct blob_buf
*buf
)
178 return blob_buf_init(buf
, BLOBMSG_TYPE_TABLE
);
181 static inline uint8_t blobmsg_get_u8(struct blob_attr
*attr
)
183 return *(uint8_t *) blobmsg_data(attr
);
186 static inline bool blobmsg_get_bool(struct blob_attr
*attr
)
188 return *(uint8_t *) blobmsg_data(attr
);
191 static inline uint16_t blobmsg_get_u16(struct blob_attr
*attr
)
193 return be16_to_cpu(*(uint16_t *) blobmsg_data(attr
));
196 static inline uint32_t blobmsg_get_u32(struct blob_attr
*attr
)
198 return be32_to_cpu(*(uint32_t *) blobmsg_data(attr
));
201 static inline uint64_t blobmsg_get_u64(struct blob_attr
*attr
)
203 uint32_t *ptr
= (uint32_t *) blobmsg_data(attr
);
204 uint64_t tmp
= ((uint64_t) be32_to_cpu(ptr
[0])) << 32;
205 tmp
|= be32_to_cpu(ptr
[1]);
209 static inline char *blobmsg_get_string(struct blob_attr
*attr
)
211 return (char *) blobmsg_data(attr
);
214 void *blobmsg_alloc_string_buffer(struct blob_buf
*buf
, const char *name
, unsigned int maxlen
);
215 void *blobmsg_realloc_string_buffer(struct blob_buf
*buf
, unsigned int maxlen
);
216 void blobmsg_add_string_buffer(struct blob_buf
*buf
);
218 void blobmsg_vprintf(struct blob_buf
*buf
, const char *name
, const char *format
, va_list arg
);
219 void blobmsg_printf(struct blob_buf
*buf
, const char *name
, const char *format
, ...)
220 __attribute__((format(printf
, 3, 4)));
223 /* blobmsg to json formatting */
225 #define blobmsg_for_each_attr(pos, attr, rem) \
226 for (rem = attr ? blobmsg_data_len(attr) : 0, \
227 pos = attr ? blobmsg_data(attr) : 0; \
228 rem > 0 && (blob_pad_len(pos) <= rem) && \
229 (blob_pad_len(pos) >= sizeof(struct blob_attr)); \
230 rem -= blob_pad_len(pos), pos = blob_next(pos))