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make blob attribute checking available externally

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This commit is contained in:
Felix Fietkau 2011-01-31 03:46:37 +01:00
parent ec593913f4
commit f2b9272e0b
2 changed files with 27 additions and 13 deletions
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39
blob.c
View file

@ -131,6 +131,28 @@ static const int blob_type_minlen[BLOB_ATTR_LAST] = {
[BLOB_ATTR_INT64] = sizeof(uint64_t),
};
bool
blob_check_type(void *ptr, int len, int type)
{
char *data = ptr;
if (type >= BLOB_ATTR_LAST)
return false;
if (type >= BLOB_ATTR_INT8 && type <= BLOB_ATTR_INT64) {
if (len != blob_type_minlen[type])
return false;
} else {
if (len < blob_type_minlen[type])
return false;
}
if (type == BLOB_ATTR_STRING && data[len] != 0)
return false;
return true;
}
int
blob_parse(struct blob_attr *attr, struct blob_attr **data, const struct blob_attr_info *info, int max)
{
@ -142,26 +164,17 @@ blob_parse(struct blob_attr *attr, struct blob_attr **data, const struct blob_at
blob_for_each_attr(pos, attr, rem) {
int id = blob_id(pos);
int len = blob_len(pos);
char *pdata;
if (id >= max)
continue;
if (info) {
int type = info[id].type;
if (type < BLOB_ATTR_LAST) {
if (type >= BLOB_ATTR_INT8 && type <= BLOB_ATTR_INT64) {
if (len != blob_type_minlen[type])
continue;
} else {
if (len < blob_type_minlen[type])
continue;
}
}
pdata = blob_data(pos);
if (type == BLOB_ATTR_STRING && pdata[len] != 0)
continue;
if (type < BLOB_ATTR_LAST) {
if (!blob_check_type(blob_data(pos), len, type))
continue;
}
if (info[id].minlen && len < info[id].minlen)
continue;

1
blob.h
View file

@ -218,6 +218,7 @@ extern struct blob_attr *blob_new(struct blob_buf *buf, int id, int payload);
extern void *blob_nest_start(struct blob_buf *buf, int id);
extern void blob_nest_end(struct blob_buf *buf, void *cookie);
extern struct blob_attr *blob_put(struct blob_buf *buf, int id, const void *ptr, int len);
extern bool blob_check_type(void *ptr, int len, int type);
extern int blob_parse(struct blob_attr *attr, struct blob_attr **data, const struct blob_attr_info *info, int max);
static inline struct blob_attr *