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