[BLOBMSG_TYPE_INT16] = BLOB_ATTR_INT16,
[BLOBMSG_TYPE_INT32] = BLOB_ATTR_INT32,
[BLOBMSG_TYPE_INT64] = BLOB_ATTR_INT64,
+ [BLOBMSG_TYPE_DOUBLE] = BLOB_ATTR_DOUBLE,
[BLOBMSG_TYPE_STRING] = BLOB_ATTR_STRING,
+ [BLOBMSG_TYPE_UNSPEC] = BLOB_ATTR_BINARY,
};
static uint16_t
bool blobmsg_check_attr(const struct blob_attr *attr, bool name)
{
+ return blobmsg_check_attr_len(attr, name, blob_raw_len(attr));
+}
+
+static bool blobmsg_check_name(const struct blob_attr *attr, size_t len, bool name)
+{
+ char *limit = (char *) attr + len;
const struct blobmsg_hdr *hdr;
- const char *data;
- int id, len;
- if (blob_len(attr) < sizeof(struct blobmsg_hdr))
+ hdr = blob_data(attr);
+ if (name && !hdr->namelen)
return false;
- hdr = (void *) attr->data;
- if (!hdr->namelen && name)
+ if ((char *) hdr->name + blobmsg_namelen(hdr) > limit)
return false;
- if (blobmsg_namelen(hdr) > blob_len(attr) - sizeof(struct blobmsg_hdr))
+ if (blobmsg_namelen(hdr) > (blob_len(attr) - sizeof(struct blobmsg_hdr)))
return false;
if (hdr->name[blobmsg_namelen(hdr)] != 0)
return false;
- id = blob_id(attr);
- len = blobmsg_data_len(attr);
+ return true;
+}
+
+static const char* blobmsg_check_data(const struct blob_attr *attr, size_t len, size_t *data_len)
+{
+ char *limit = (char *) attr + len;
+ const char *data;
+
+ *data_len = blobmsg_data_len(attr);
+ if (*data_len > blob_raw_len(attr))
+ return NULL;
+
data = blobmsg_data(attr);
+ if (data + *data_len > limit)
+ return NULL;
- if (!id || id > BLOBMSG_TYPE_LAST)
+ return data;
+}
+
+bool blobmsg_check_attr_len(const struct blob_attr *attr, bool name, size_t len)
+{
+ const char *data;
+ size_t data_len;
+ int id;
+
+ if (len < sizeof(struct blob_attr))
+ return false;
+
+ if (!blobmsg_check_name(attr, len, name))
+ return false;
+
+ id = blob_id(attr);
+ if (id > BLOBMSG_TYPE_LAST)
return false;
if (!blob_type[id])
return true;
- return blob_check_type(data, len, blob_type[id]);
+ data = blobmsg_check_data(attr, len, &data_len);
+ if (!data)
+ return false;
+
+ return blob_check_type(data, data_len, blob_type[id]);
}
-bool blobmsg_check_attr_list(const struct blob_attr *attr, int type)
+int blobmsg_check_array(const struct blob_attr *attr, int type)
{
struct blob_attr *cur;
bool name;
- int rem;
+ size_t rem;
+ int size = 0;
switch (blobmsg_type(attr)) {
case BLOBMSG_TYPE_TABLE:
name = false;
break;
default:
- return false;
+ return -1;
}
blobmsg_for_each_attr(cur, attr, rem) {
- if (blobmsg_type(cur) != type)
- return false;
+ if (type != BLOBMSG_TYPE_UNSPEC && blobmsg_type(cur) != type)
+ return -1;
if (!blobmsg_check_attr(cur, name))
- return false;
+ return -1;
+
+ size++;
}
- return true;
+ return size;
+}
+
+bool blobmsg_check_attr_list(const struct blob_attr *attr, int type)
+{
+ return blobmsg_check_array(attr, type) >= 0;
}
int blobmsg_parse_array(const struct blobmsg_policy *policy, int policy_len,
- struct blob_attr **tb, void *data, int len)
+ struct blob_attr **tb, void *data, unsigned int len)
{
struct blob_attr *attr;
int i = 0;
blob_id(attr) != policy[i].type)
continue;
- if (!blobmsg_check_attr(attr, true))
+ if (!blobmsg_check_attr_len(attr, false, len))
return -1;
if (tb[i])
int blobmsg_parse(const struct blobmsg_policy *policy, int policy_len,
- struct blob_attr **tb, void *data, int len)
+ struct blob_attr **tb, void *data, unsigned int len)
{
struct blobmsg_hdr *hdr;
struct blob_attr *attr;
int i;
memset(tb, 0, policy_len * sizeof(*tb));
+ if (!data || !len)
+ return -EINVAL;
pslen = alloca(policy_len);
for (i = 0; i < policy_len; i++) {
if (!policy[i].name)
if (blobmsg_namelen(hdr) != pslen[i])
continue;
- if (!blobmsg_check_attr(attr, true))
+ if (!blobmsg_check_attr_len(attr, true, len))
return -1;
if (tb[i])
if (!attr)
return NULL;
+ attr->id_len |= be32_to_cpu(BLOB_ATTR_EXTENDED);
hdr = blob_data(attr);
hdr->namelen = cpu_to_be16(namelen);
strcpy((char *) hdr->name, (const char *)name);
static inline int
attr_to_offset(struct blob_buf *buf, struct blob_attr *attr)
{
- return (char *)attr - (char *) buf->buf;
+ return (char *)attr - (char *) buf->buf + BLOB_COOKIE;
}
void *
blobmsg_open_nested(struct blob_buf *buf, const char *name, bool array)
{
- struct blob_attr *head = buf->head;
+ struct blob_attr *head;
int type = array ? BLOBMSG_TYPE_ARRAY : BLOBMSG_TYPE_TABLE;
unsigned long offset = attr_to_offset(buf, buf->head);
void *data;
name = "";
head = blobmsg_new(buf, type, name, 0, &data);
+ if (!head)
+ return NULL;
blob_set_raw_len(buf->head, blob_pad_len(buf->head) - blobmsg_hdrlen(strlen(name)));
buf->head = head;
return (void *)offset;
}
+__attribute__((format(printf, 3, 0)))
+int blobmsg_vprintf(struct blob_buf *buf, const char *name, const char *format, va_list arg)
+{
+ va_list arg2;
+ char cbuf;
+ char *sbuf;
+ int len, ret;
+
+ va_copy(arg2, arg);
+ len = vsnprintf(&cbuf, sizeof(cbuf), format, arg2);
+ va_end(arg2);
+
+ sbuf = blobmsg_alloc_string_buffer(buf, name, len + 1);
+ if (!sbuf)
+ return -1;
+ ret = vsprintf(sbuf, format, arg);
+ blobmsg_add_string_buffer(buf);
+
+ return ret;
+}
+
+__attribute__((format(printf, 3, 4)))
+int blobmsg_printf(struct blob_buf *buf, const char *name, const char *format, ...)
+{
+ va_list ap;
+ int ret;
+
+ va_start(ap, format);
+ ret = blobmsg_vprintf(buf, name, format, ap);
+ va_end(ap);
+
+ return ret;
+}
+
void *
-blobmsg_alloc_string_buffer(struct blob_buf *buf, const char *name, int maxlen)
+blobmsg_alloc_string_buffer(struct blob_buf *buf, const char *name, unsigned int maxlen)
{
struct blob_attr *attr;
void *data_dest;
if (!attr)
return NULL;
- data_dest = blobmsg_data(attr);
blob_set_raw_len(buf->head, blob_pad_len(buf->head) - blob_pad_len(attr));
blob_set_raw_len(attr, blob_raw_len(attr) - maxlen);
return data_dest;
}
+void *
+blobmsg_realloc_string_buffer(struct blob_buf *buf, unsigned int maxlen)
+{
+ struct blob_attr *attr = blob_next(buf->head);
+ int offset = attr_to_offset(buf, blob_next(buf->head)) + blob_pad_len(attr) - BLOB_COOKIE;
+ int required = maxlen - (buf->buflen - offset);
+
+ if (required <= 0)
+ goto out;
+
+ if (!blob_buf_grow(buf, required))
+ return NULL;
+ attr = blob_next(buf->head);
+
+out:
+ return blobmsg_data(attr);
+}
+
void
blobmsg_add_string_buffer(struct blob_buf *buf)
{
int
blobmsg_add_field(struct blob_buf *buf, int type, const char *name,
- const void *data, int len)
+ const void *data, unsigned int len)
{
struct blob_attr *attr;
void *data_dest;
projects / project / libubox.git / blobdiff