GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: usr.sbin/npppd/npppd/../l2tp/l2tp_subr.h Lines: 0 11 0.0 %
Date: 2017-11-13 Branches: 0 0 0.0 %

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/*	$OpenBSD: l2tp_subr.h,v 1.6 2013/09/20 07:26:23 yasuoka Exp $	*/
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/*-
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 * Copyright (c) 2009 Internet Initiative Japan Inc.
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 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 * 1. Redistributions of source code must retain the above copyright
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 *    notice, this list of conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright
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 *    notice, this list of conditions and the following disclaimer in the
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 *    documentation and/or other materials provided with the distribution.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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 * SUCH DAMAGE.
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 */
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#ifndef	L2TP_SUBR_H
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#define	L2TP_SUBR_H	1
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/* $Id: l2tp_subr.h,v 1.6 2013/09/20 07:26:23 yasuoka Exp $ */
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/**
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 * structure of L2TP Attribute Value Pair (AVP) packet header
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 */
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struct l2tp_avp
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{
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#if	BYTE_ORDER == LITTLE_ENDIAN
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	uint16_t	length:10,
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			rsvd:4,
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			is_hidden:1,
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			is_mandatory:1;
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#else
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	uint16_t	is_mandatory:1,
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			is_hidden:1,
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			rsvd:4,
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			length:10;
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#endif
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	uint16_t	vendor_id;
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	uint16_t	attr_type;
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	u_char 		attr_value[0];
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} __attribute__((__packed__)) ;
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#define	avp_attr_length(avp)	((avp)->length - 6)
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static inline uint16_t
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avp_get_val16(struct l2tp_avp *avp)
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{
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	return (avp->attr_value[0] << 8) | avp->attr_value[1];
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}
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static inline uint32_t
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avp_get_val32(struct l2tp_avp *avp)
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{
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	return (avp->attr_value[0] << 24) | (avp->attr_value[1] << 16) |
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		(avp->attr_value[2] << 8) | avp->attr_value[3];
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}
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static inline void
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avp_set_val16(struct l2tp_avp *avp, uint16_t val)
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{
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	avp->attr_value[0] = val >> 8;
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	avp->attr_value[1] = val & 0xff;
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}
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static inline void
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avp_set_val32(struct l2tp_avp *avp, uint32_t val)
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{
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	avp->attr_value[0] = val >> 24;
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	avp->attr_value[1] = val >> 16;
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	avp->attr_value[2] = val >> 8;
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	avp->attr_value[3] = val & 0xff;
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}
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static inline int
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short_cmp(const void *m, const void *n)
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{
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	return ((intptr_t)m - (intptr_t)n);
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}
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static inline uint32_t
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short_hash(const void *v, int sz)
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{
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	return ((uintptr_t)v % sz);
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}
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/*
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 * macro to check AVP size.
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 * Prepare 1) char array `emes' for error message, 2) size_check_failed label
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 * before use this macro.
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 */
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#define	AVP_SIZE_CHECK(_avp, _op, _exp)					\
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	do {								\
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		if (!((_avp)->length _op (_exp))) {			\
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			snprintf(emes, sizeof(emes),			\
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			    "invalid packet size %s %d" #_op "%d)",	\
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			    avp_attr_type_string((_avp)->attr_type),	\
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			    (_avp)->length, (_exp));			\
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			goto size_check_failed;				\
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		}							\
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	} while (/* CONSTCOND */0)
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#define AVP_MAXLEN_CHECK(_avp, _maxlen)					\
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	do {								\
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		if ((_avp)->length > (_maxlen) + 6) {			\
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			snprintf(emes, sizeof(emes),			\
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			    "Attribute value is too long %s %d > %d",	\
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			    avp_attr_type_string((_avp)->attr_type),	\
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			    (_avp)->length - 6, (int)(_maxlen));	\
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			goto size_check_failed;				\
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		}							\
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	} while (/* CONSTCOND */0)
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#ifdef __cplusplus
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extern "C" {
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#endif
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int              avp_enum (struct l2tp_avp *, const u_char *, int, int);
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const char       *avp_attr_type_string (int);
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struct l2tp_avp  *avp_find_message_type_avp(struct l2tp_avp *, const u_char *, int);
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struct l2tp_avp  *avp_find(struct l2tp_avp *, const u_char *, int, uint16_t, uint16_t, int);
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int              bytebuf_add_avp (bytebuffer *, struct l2tp_avp *, int);
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const char       *avp_mes_type_string (int);
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const char *     l2tp_cdn_rcode_string(int);
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const char *     l2tp_stopccn_rcode_string(int);
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const char *     l2tp_ecode_string(int);
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#ifdef __cplusplus
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}
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#endif
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#endif