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Switch the printing of open sockets from ugly KVM internals to use
kvm_getfiles. This allows to run netstat without any extra privileges
and removes another setgid program from base..
There is still kvm reader code in there which is used for debugging
purposes (crashdump). netstat should still behave mostly the same.
deraadt@ and sthen@ agree that it is time to get this puppy in.

/*	$OpenBSD: netstat.h,v 1.68 2015/02/12 01:49:02 claudio Exp $	*/
/*	$NetBSD: netstat.h,v 1.6 1996/05/07 02:55:05 thorpej Exp $	*/

/*
 * Copyright (c) 1992, 1993
 *	Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	from: @(#)netstat.h	8.2 (Berkeley) 1/4/94
 */

#include <kvm.h>

/* What is the max length of a pointer printed with %p (including 0x)? */
#define PLEN	(LONG_BIT / 4 + 2)

/* a bit of magic to print addresses as they should */
#define	FAKE_PTR(p)	(PLEN - ((p) ? 0 : 2)), p, ((p) ? "" : "x0")

int	Aflag;		/* show addresses of protocol control block */
int	aflag;		/* show all sockets (including servers) */
int	Bflag;		/* show TCP send and receive buffer sizes */
int	bflag;		/* show bytes instead of packets */
int	dflag;		/* show i/f dropped packets */
int	Fflag;		/* show routes whose gateways are in specified AF */
int	gflag;		/* show group (multicast) routing or stats */
int	hflag;		/* print human numbers */
int	iflag;		/* show interfaces */
int	lflag;		/* show routing table with use and ref */
int	mflag;		/* show memory stats */
int	nflag;		/* show addresses numerically */
int	pflag;		/* show given protocol */
int	Pflag;		/* show given PCB */
int	qflag;		/* only display non-zero values for output */
int	rflag;		/* show routing tables (or routing stats) */
int	sflag;		/* show protocol statistics */
int	tflag;		/* show i/f watchdog timers */
int	vflag;		/* be verbose */
int	Wflag;		/* show net80211 protocol statistics */

int	interval;	/* repeat interval for i/f stats */

char	*interface;	/* desired i/f for stats, or NULL for all i/fs */

int	af;		/* address family */

extern	char *__progname; /* program name, from crt0.o */

int	kread(u_long addr, void *buf, int size);
char	*plural(u_int64_t);
char	*plurales(u_int64_t);

void	protopr(kvm_t *, u_long, u_int, int);

struct kinfo_file;
void	netdomainpr(struct kinfo_file *, int);
void	unixdomainpr(struct kinfo_file *);

void	socket_dump(u_long);
void	unpcb_dump(u_long);

void	tcp_stats(char *);
void	udp_stats(char *);
void	ip_stats(char *);
void	div_stats(char *);
void	icmp_stats(char *);
void	igmp_stats(char *);
void	pim_stats(char *);
void	ah_stats(char *);
void	esp_stats(char *);
void	ipip_stats(char *);
void	carp_stats (char *);
void	pfsync_stats (char *);
void	pflow_stats (char *);
void	etherip_stats(char *);
void	ipcomp_stats(char *);

void	net80211_ifstats(char *);

void	mbpr(void);

void	hostpr(u_long, u_long);
void	impstats(u_long, u_long);

void	rt_stats(void);
void	pr_rthdr(int, int);
void	pr_encaphdr(void);
void	pr_family(int);

void	ip6_stats(char *);
void	ip6_ifstats(char *);
void	icmp6_stats(char *);
void	icmp6_ifstats(char *);
void	pim6_stats(char *);
void	div6_stats(char *);
void	rip6_stats(char *);
void	mroute6pr(void);
void	mrt6_stats(void);

struct in6_addr;
struct sockaddr_in6;
void	inet6print(struct in6_addr *, int, const char *);
char	*routename6(struct sockaddr_in6 *);
char	*netname6(struct sockaddr_in6 *, struct sockaddr_in6 *);

size_t	get_sysctl(const int *, u_int, char **);
void	p_rttables(int, u_int);
void	p_flags(int, char *);
void	p_addr(struct sockaddr *, struct sockaddr *, int);
void	p_gwaddr(struct sockaddr *, int);
void	p_sockaddr(struct sockaddr *, struct sockaddr *, int, int);
char	*routename(struct sockaddr *);
char	*routename4(in_addr_t);
char	*netname(struct sockaddr *, struct sockaddr *);
char	*netname4(in_addr_t, in_addr_t);
char	*mpls_op(u_int32_t);
void	routepr(u_long, u_long, u_long, u_long, u_int);

void	nsprotopr(u_long, char *);

void	intpr(int, int);

void	mroutepr(void);
void	mrt_stats(void);