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Add wpabuf_clear_free() to allow clearing of freed memory

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This can be useful when a wpabuf is used to store private data that
should not be left in heap after use.

Signed-off-by: Jouni Malinen <j@w1.fi>
This commit is contained in:
Jouni Malinen 2015-01-05 18:02:04 +02:00
parent 59be78ef93
commit 77c45e2b35
2 changed files with 10 additions and 0 deletions
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9
src/utils/wpabuf.c
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@ -205,6 +205,15 @@ void wpabuf_free(struct wpabuf *buf)
} }
void wpabuf_clear_free(struct wpabuf *buf)
{
if (buf) {
os_memset(wpabuf_mhead(buf), 0, wpabuf_len(buf));
wpabuf_free(buf);
}
}
void * wpabuf_put(struct wpabuf *buf, size_t len) void * wpabuf_put(struct wpabuf *buf, size_t len)
{ {
void *tmp = wpabuf_mhead_u8(buf) + wpabuf_len(buf); void *tmp = wpabuf_mhead_u8(buf) + wpabuf_len(buf);

1
src/utils/wpabuf.h
View File

@ -32,6 +32,7 @@ struct wpabuf * wpabuf_alloc_ext_data(u8 *data, size_t len);
struct wpabuf * wpabuf_alloc_copy(const void *data, size_t len); struct wpabuf * wpabuf_alloc_copy(const void *data, size_t len);
struct wpabuf * wpabuf_dup(const struct wpabuf *src); struct wpabuf * wpabuf_dup(const struct wpabuf *src);
void wpabuf_free(struct wpabuf *buf); void wpabuf_free(struct wpabuf *buf);
void wpabuf_clear_free(struct wpabuf *buf);
void * wpabuf_put(struct wpabuf *buf, size_t len); void * wpabuf_put(struct wpabuf *buf, size_t len);
struct wpabuf * wpabuf_concat(struct wpabuf *a, struct wpabuf *b); struct wpabuf * wpabuf_concat(struct wpabuf *a, struct wpabuf *b);
struct wpabuf * wpabuf_zeropad(struct wpabuf *buf, size_t len); struct wpabuf * wpabuf_zeropad(struct wpabuf *buf, size_t len);