Remove unused global variables as well as unused memory

allocations from ipfilter in preparation for VNET support.

Suggested by:		cy (see D7000)
Sponsored by:		The FreeBSD Foundation
MFC after:		2 weeks
Approved by:		re (gjb)

sys/contrib/ipfilter/netinet/ip_fil.h

@@ -1710,7 +1710,6 @@ typedef struct ipf_main_softc_s {
 
 #ifndef	_KERNEL
 extern	int	ipf_check __P((void *, struct ip *, int, void *, int, mb_t **));
-extern	int	(*ipf_checkp) __P((ip_t *, int, void *, int, mb_t **));
 extern	struct	ifnet *get_unit __P((char *, int));
 extern	char	*get_ifname __P((struct ifnet *));
 extern	int	ipfioctl __P((ipf_main_softc_t *, int, ioctlcmd_t,

sys/contrib/ipfilter/netinet/ip_fil_freebsd.c

@@ -99,10 +99,8 @@ MALLOC_DEFINE(M_IPFILTER, "ipfilter", "IP Filter packet filter data structures")
 # endif
 
 
-static	int	(*ipf_savep) __P((void *, ip_t *, int, void *, int, struct mbuf **));
 static	int	ipf_send_ip __P((fr_info_t *, mb_t *));
 static void	ipf_timer_func __P((void *arg));
-int		ipf_locks_done = 0;
 
 ipf_main_softc_t ipfmain;
 
@@ -110,10 +108,6 @@ ipf_main_softc_t ipfmain;
 # if defined(NETBSD_PF)
 #  include <net/pfil.h>
 # endif /* NETBSD_PF */
-/*
- * We provide the ipf_checkp name just to minimize changes later.
- */
-int (*ipf_checkp) __P((void *, ip_t *ip, int hlen, void *ifp, int out, mb_t **mp));
 
 
 static eventhandler_tag ipf_arrivetag, ipf_departtag, ipf_clonetag;
@@ -221,11 +215,6 @@ ipfattach(softc)
 	}
 
 
-	if (ipf_checkp != ipf_check) {
-		ipf_savep = ipf_checkp;
-		ipf_checkp = ipf_check;
-	}
-
 	bzero((char *)ipfmain.ipf_selwait, sizeof(ipfmain.ipf_selwait));
 	softc->ipf_running = 1;
 
@@ -268,12 +257,6 @@ ipfdetach(softc)
 #endif
 	callout_drain(&softc->ipf_slow_ch);
 
-#ifndef NETBSD_PF
-	if (ipf_checkp != NULL)
-		ipf_checkp = ipf_savep;
-	ipf_savep = NULL;
-#endif
-
 	ipf_fini_all(softc);
 
 	softc->ipf_running = -2;

sys/contrib/ipfilter/netinet/ip_nat.c

@@ -133,8 +133,6 @@ static const char rcsid[] = "@(#)$FreeBSD$";
 #define	NBUMPSIDEDF(y,x)do { softn->ipf_nat_stats.ns_side[y].x++; \
 			     DT1(x, fr_info_t *, fin); } while (0)
 
-frentry_t	ipfnatblock;
-
 static ipftuneable_t ipf_nat_tuneables[] = {
 	/* nat */
 	{ { (void *)offsetof(ipf_nat_softc_t, ipf_nat_lock) },
@@ -275,9 +273,6 @@ static	void	ipf_nat_tabmove __P((ipf_nat_softc_t *, nat_t *));
 int
 ipf_nat_main_load()
 {
-	bzero((char *)&ipfnatblock, sizeof(ipfnatblock));
-	ipfnatblock.fr_flags = FR_BLOCK|FR_QUICK;
-	ipfnatblock.fr_ref = 1;
 
 	return 0;
 }