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 bool blobmsg_check_attr_list(const struct blob_attr
*attr
, int type
);
82 int blobmsg_parse(const struct blobmsg_policy
*policy
, int policy_len
,
83 struct blob_attr
**tb
, void *data
, int len
);
85 int blobmsg_add_field(struct blob_buf
*buf
, int type
, const char *name
,
86 const void *data
, int len
);
89 blobmsg_add_u8(struct blob_buf
*buf
, const char *name
, uint8_t val
)
91 return blobmsg_add_field(buf
, BLOBMSG_TYPE_INT8
, name
, &val
, 1);
95 blobmsg_add_u16(struct blob_buf
*buf
, const char *name
, uint16_t val
)
97 val
= cpu_to_be16(val
);
98 return blobmsg_add_field(buf
, BLOBMSG_TYPE_INT16
, name
, &val
, 2);
102 blobmsg_add_u32(struct blob_buf
*buf
, const char *name
, uint32_t val
)
104 val
= cpu_to_be32(val
);
105 return blobmsg_add_field(buf
, BLOBMSG_TYPE_INT32
, name
, &val
, 4);
109 blobmsg_add_u64(struct blob_buf
*buf
, const char *name
, uint64_t val
)
111 val
= cpu_to_be64(val
);
112 return blobmsg_add_field(buf
, BLOBMSG_TYPE_INT64
, name
, &val
, 8);
116 blobmsg_add_string(struct blob_buf
*buf
, const char *name
, const char *string
)
118 return blobmsg_add_field(buf
, BLOBMSG_TYPE_STRING
, name
, string
, strlen(string
) + 1);
122 blobmsg_add_blob(struct blob_buf
*buf
, struct blob_attr
*attr
)
124 return blobmsg_add_field(buf
, blobmsg_type(attr
), blobmsg_name(attr
),
125 blobmsg_data(attr
), blobmsg_data_len(attr
));
128 void *blobmsg_open_nested(struct blob_buf
*buf
, const char *name
, bool array
);
131 blobmsg_open_array(struct blob_buf
*buf
, const char *name
)
133 return blobmsg_open_nested(buf
, name
, true);
137 blobmsg_open_table(struct blob_buf
*buf
, const char *name
)
139 return blobmsg_open_nested(buf
, name
, false);
143 blobmsg_close_array(struct blob_buf
*buf
, void *cookie
)
145 blob_nest_end(buf
, cookie
);
149 blobmsg_close_table(struct blob_buf
*buf
, void *cookie
)
151 blob_nest_end(buf
, cookie
);
154 static inline int blobmsg_buf_init(struct blob_buf
*buf
)
156 return blob_buf_init(buf
, BLOBMSG_TYPE_TABLE
);
159 static inline uint8_t blobmsg_get_u8(struct blob_attr
*attr
)
161 return *(uint8_t *) blobmsg_data(attr
);
164 static inline bool blobmsg_get_bool(struct blob_attr
*attr
)
166 return *(uint8_t *) blobmsg_data(attr
);
169 static inline uint16_t blobmsg_get_u16(struct blob_attr
*attr
)
171 return be16_to_cpu(*(uint16_t *) blobmsg_data(attr
));
174 static inline uint32_t blobmsg_get_u32(struct blob_attr
*attr
)
176 return be32_to_cpu(*(uint32_t *) blobmsg_data(attr
));
179 static inline uint64_t blobmsg_get_u64(struct blob_attr
*attr
)
181 return be64_to_cpu(*(uint64_t *) blobmsg_data(attr
));
184 void *blobmsg_alloc_string_buffer(struct blob_buf
*buf
, const char *name
, int maxlen
);
185 void blobmsg_add_string_buffer(struct blob_buf
*buf
);
187 /* blobmsg to json formatting */
189 #define blobmsg_for_each_attr(pos, attr, rem) \
190 for (rem = blobmsg_data_len(attr), pos = blobmsg_data(attr); \
191 rem > 0 && (blob_pad_len(pos) <= rem) && \
192 (blob_pad_len(pos) >= sizeof(struct blob_attr)); \
193 rem -= blob_pad_len(pos), pos = blob_next(pos))