[BLOBMSG_TYPE_UNSPEC] = BLOB_ATTR_BINARY,
};
-static uint16_t
-blobmsg_namelen(const struct blobmsg_hdr *hdr)
-{
- return be16_to_cpu(hdr->namelen);
-}
-
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)
+static bool blobmsg_check_name(const struct blob_attr *attr, bool name)
{
- char *limit = (char *) attr + len;
const struct blobmsg_hdr *hdr;
+ uint16_t namelen;
- hdr = blob_data(attr);
- if (name && !hdr->namelen)
+ if (!blob_is_extended(attr))
+ return !name;
+
+ if (blob_len(attr) < sizeof(struct blobmsg_hdr))
return false;
- if ((char *) hdr->name + blobmsg_namelen(hdr) > limit)
+ hdr = (const struct blobmsg_hdr *)blob_data(attr);
+ if (name && !hdr->namelen)
return false;
- if (blobmsg_namelen(hdr) > (blob_len(attr) - sizeof(struct blobmsg_hdr)))
+ namelen = blobmsg_namelen(hdr);
+ if (blob_len(attr) < (size_t)blobmsg_hdrlen(namelen))
return false;
- if (hdr->name[blobmsg_namelen(hdr)] != 0)
+ if (hdr->name[namelen] != 0)
return false;
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;
-
- return data;
-}
-
bool blobmsg_check_attr_len(const struct blob_attr *attr, bool name, size_t len)
{
const char *data;
if (len < sizeof(struct blob_attr))
return false;
- if (!blobmsg_check_name(attr, len, name))
+ data_len = blob_raw_len(attr);
+ if (data_len < sizeof(struct blob_attr) || data_len > len)
+ return false;
+
+ if (!blobmsg_check_name(attr, name))
return false;
id = blob_id(attr);
if (!blob_type[id])
return true;
- data = blobmsg_check_data(attr, len, &data_len);
- if (!data)
- return false;
+ data = blobmsg_data(attr);
+ data_len = blobmsg_data_len(attr);
return blob_check_type(data, data_len, blob_type[id]);
}
int blobmsg_check_array(const struct blob_attr *attr, int type)
+{
+ return blobmsg_check_array_len(attr, type, blob_raw_len(attr));
+}
+
+int blobmsg_check_array_len(const struct blob_attr *attr, int type,
+ size_t blob_len)
{
struct blob_attr *cur;
- bool name;
size_t rem;
+ bool name;
int size = 0;
+ if (type > BLOBMSG_TYPE_LAST)
+ return -1;
+
+ if (!blobmsg_check_attr_len(attr, false, blob_len))
+ return -1;
+
switch (blobmsg_type(attr)) {
case BLOBMSG_TYPE_TABLE:
name = true;
if (type != BLOBMSG_TYPE_UNSPEC && blobmsg_type(cur) != type)
return -1;
- if (!blobmsg_check_attr(cur, name))
+ if (!blobmsg_check_attr_len(cur, name, rem))
return -1;
size++;
return blobmsg_check_array(attr, type) >= 0;
}
+bool blobmsg_check_attr_list_len(const struct blob_attr *attr, int type, size_t len)
+{
+ return blobmsg_check_array_len(attr, type, len) >= 0;
+}
+
int blobmsg_parse_array(const struct blobmsg_policy *policy, int policy_len,
struct blob_attr **tb, void *data, unsigned int len)
{
return 0;
}
-
int blobmsg_parse(const struct blobmsg_policy *policy, int policy_len,
struct blob_attr **tb, void *data, unsigned int len)
{
- struct blobmsg_hdr *hdr;
+ const struct blobmsg_hdr *hdr;
struct blob_attr *attr;
uint8_t *pslen;
int i;
}
__blob_for_each_attr(attr, data, len) {
+ if (!blobmsg_check_attr_len(attr, false, len))
+ return -1;
+
+ if (!blob_is_extended(attr))
+ continue;
+
hdr = blob_data(attr);
for (i = 0; i < policy_len; i++) {
if (!policy[i].name)
continue;
if (policy[i].type != BLOBMSG_TYPE_UNSPEC &&
+ policy[i].type != BLOBMSG_CAST_INT64 &&
blob_id(attr) != policy[i].type)
continue;
- if (blobmsg_namelen(hdr) != pslen[i])
+ if (policy[i].type == BLOBMSG_CAST_INT64 &&
+ (blob_id(attr) != BLOBMSG_TYPE_INT64 &&
+ blob_id(attr) != BLOBMSG_TYPE_INT32 &&
+ blob_id(attr) != BLOBMSG_TYPE_INT16 &&
+ blob_id(attr) != BLOBMSG_TYPE_INT8))
continue;
- if (!blobmsg_check_attr_len(attr, true, len))
- return -1;
+ if (blobmsg_namelen(hdr) != pslen[i])
+ continue;
if (tb[i])
continue;
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);
+
+ memcpy(hdr->name, name, namelen);
+ hdr->name[namelen] = '\0';
+
pad_end = *data = blobmsg_data(attr);
pad_start = (char *) &hdr->name[namelen];
if (pad_start < pad_end)
len = vsnprintf(&cbuf, sizeof(cbuf), format, arg2);
va_end(arg2);
+ if (len < 0)
+ return -1;
+
sbuf = blobmsg_alloc_string_buffer(buf, name, len + 1);
if (!sbuf)
return -1;
- ret = vsprintf(sbuf, format, arg);
+
+ ret = vsnprintf(sbuf, len + 1, format, arg);
+ if (ret < 0)
+ return -1;
+
blobmsg_add_string_buffer(buf);
return ret;