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// SPDX-License-Identifier: BSD-3-Clause
/*
* linux/net/sunrpc/auth_gss/auth_gss_internal.h
*
* Internal definitions for RPCSEC_GSS client authentication
*
* Copyright (c) 2000 The Regents of the University of Michigan.
* All rights reserved.
*
*/
#include <linux/err.h>
#include <linux/string.h>
#include <linux/sunrpc/xdr.h>
static inline const void *
simple_get_bytes(const void *p, const void *end, void *res, size_t len)
{
const void *q = (const void *)((const char *)p + len);
if (unlikely(q > end || q < p))
return ERR_PTR(-EFAULT);
memcpy(res, p, len);
return q;
}
static inline const void *
simple_get_netobj(const void *p, const void *end, struct xdr_netobj *dest)
{
const void *q;
unsigned int len;
p = simple_get_bytes(p, end, &len, sizeof(len));
if (IS_ERR(p))
return p;
q = (const void *)((const char *)p + len);
if (unlikely(q > end || q < p))
return ERR_PTR(-EFAULT);
if (len) {
dest->data = kmemdup(p, len, GFP_NOFS);
if (unlikely(dest->data == NULL))
return ERR_PTR(-ENOMEM);
} else
dest->data = NULL;
dest->len = len;
return q;
}
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