/*	$OpenBSD:?addrmatch.cv?1.14?2018/07/31?03:07:24?djm?Exp?$?*/

/*
?*?Copyright?（c）?2004-2008?Damien?Miller?
?*
?*?Permission?to?use?copy?modify?and?distribute?this?software?for?any
?*?purpose?with?or?without?fee?is?hereby?granted?provided?that?the?above
?*?copyright?notice?and?this?permission?notice?appear?in?all?copies.
?*
?*?THE?SOFTWARE?IS?PROVIDED?“AS?IS“?AND?THE?AUTHOR?DISCLAIMS?ALL?WARRANTIES
?*?WITH?REGARD?TO?THIS?SOFTWARE?INCLUDING?ALL?IMPLIED?WARRANTIES?OF
?*?MERCHANTABILITY?AND?FITNESS.?IN?NO?EVENT?SHALL?THE?AUTHOR?BE?LIABLE?FOR
?*?ANY?SPECIAL?DIRECT?INDIRECT?OR?CONSEQUENTIAL?DAMAGES?OR?ANY?DAMAGES
?*?WHATSOEVER?RESULTING?FROM?LOSS?OF?USE?DATA?OR?PROFITS?WHETHER?IN?AN
?*?ACTION?OF?CONTRACT?NEGLIGENCE?OR?OTHER?TORTIOUS?ACTION?ARISING?OUT?OF
?*?OR?IN?CONNECTION?WITH?THE?USE?OR?PERFORMANCE?OF?THIS?SOFTWARE.
?*/

#include?“includes.h“

#include?
#include?
#include?
#include?

#include?
#include?
#include?
#include?
#include?

#include?“match.h“
#include?“log.h“

struct?xaddr?{
	sa_family_t	af;
	union?{
		struct?in_addr		v4;
		struct?in6_addr		v6;
		u_int8_t		addr8[16];
		u_int32_t		addr32[4];
	}?xa;		????/*?128-bit?address?*/
	u_int32_t	scope_id;	/*?iface?scope?id?for?v6?*/
#define?v4	xa.v4
#define?v6	xa.v6
#define?addr8	xa.addr8
#define?addr32	xa.addr32
};

static?int
addr_unicast_masklen（int?af）
{
	switch?（af）?{
	case?AF_INET:
		return?32;
	case?AF_INET6:
		return?128;
	default:
		return?-1;
	}
}

static?inline?int
masklen_valid（int?af?u_int?masklen）
{
	switch?（af）?{
	case?AF_INET:
		return?masklen?<=?32???0?:?-1;
	case?AF_INET6:
		return?masklen?<=?128???0?:?-1;
	default:
		return?-1;
	}
}

/*
?*?Convert?struct?sockaddr?to?struct?xaddr
?*?Returns?0?on?success?-1?on?failure.
?*/
static?int
addr_sa_to_xaddr（struct?sockaddr?*sa?socklen_t?slen?struct?xaddr?*xa）
{
	struct?sockaddr_in?*in4?=?（struct?sockaddr_in?*）sa;
	struct?sockaddr_in6?*in6?=?（struct?sockaddr_in6?*）sa;

	memset（xa?‘\0‘?sizeof（*xa））;

	switch?（sa->sa_family）?{
	case?AF_INET:
		if?（slen?			return?-1;
		xa->af?=?AF_INET;
		memcpy（&xa->v4?&in4->sin_addr?sizeof（xa->v4））;
		break;
	case?AF_INET6:
		if?（slen?			return?-1;
		xa->af?=?AF_INET6;
		memcpy（&xa->v6?&in6->sin6_addr?sizeof（xa->v6））;
#ifdef?HAVE_STRUCT_SOCKADDR_IN6_SIN6_SCOPE_ID
		xa->scope_id?=?in6->sin6_scope_id;
#endif
		break;
	default:
		return?-1;
	}

	return?0;
}

/*
?*?Calculate?a?netmask?of?length?‘l‘?for?address?family?‘af‘?and
?*?store?it?in?‘n‘.
?*?Returns?0?on?success?-1?on?failure.
?*/
static?int
addr_netmask（int?af?u_int?l?struct?xaddr?*n）
{
	int?i;

	if?（masklen_valid（af?l）?!=?0?||?n?==?NULL）
		return?-1;

	memset（n?‘\0‘?sizeof（*n））;
	switch?（af）?{
	case?AF_INET:
		n->af?=?AF_INET;
		if?（l?==?0）
			return?0;
		n->v4.s_addr?=?htonl（（0xffffffff?<		return?0;
	case?AF_INET6:
		n->af?=?A