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))