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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* ppp_defs.h - PPP definitions.
*
* Copyright 1994-2000 Paul Mackerras.
*/
#ifndef _PPP_DEFS_H_
#define _PPP_DEFS_H_
#include <linux/crc-ccitt.h>
#include <uapi/linux/ppp_defs.h>
#define PPP_FCS(fcs, c) crc_ccitt_byte(fcs, c)
/**
* ppp_proto_is_valid - checks if PPP protocol is valid
* @proto: PPP protocol
*
* Assumes proto is not compressed.
* Protocol is valid if the value is odd and the least significant bit of the
* most significant octet is 0 (see RFC 1661, section 2).
*/
static inline bool ppp_proto_is_valid(u16 proto)
{
return !!((proto & 0x0101) == 0x0001);
}
#endif /* _PPP_DEFS_H_ */