Nuke the old antique copy of ipfilter from the tree. This is old enough

to be dangerous.  It will better serve us as a port building a KLD,
ala SKIP.

The hooks are staying although it would be better to port and use
the NetBSD pfil interface rather than have custom hooks.

1 files changed, 0 insertions, 467 deletions

diff --git a/sys/netinet/ip_frag.c b/sys/netinet/ip_frag.c
deleted file mode 100644
index de104e5..0000000
--- a/sys/netinet/ip_frag.c
+++ /dev/null
@@ -1,467 +0,0 @@
-/*
- * Copyright (C) 1993-1997 by Darren Reed.
- *
- * Redistribution and use in source and binary forms are permitted
- * provided that this notice is preserved and due credit is given
- * to the original author and the contributors.
- */
-#if !defined(lint)
-static const char sccsid[] = "@(#)ip_frag.c	1.11 3/24/96 (C) 1993-1995 Darren Reed";
-static const char rcsid[] = "@(#)$FreeBSD$";
-#endif
-
-#if !defined(_KERNEL) && defined(KERNEL)
-#define _KERNEL
-#endif
-#define __FreeBSD_version 300000	/* it's a hack, but close enough */
-
-#if !defined(_KERNEL) && !defined(KERNEL)
-# include <string.h>
-# include <stdlib.h>
-#endif
-#include <sys/errno.h>
-#include <sys/types.h>
-#include <sys/param.h>
-#include <sys/time.h>
-#include <sys/file.h>
-#if defined(KERNEL) && (__FreeBSD_version >= 220000)
-#include <sys/filio.h>
-#include <sys/fcntl.h>
-#include <sys/malloc.h>
-#else
-#include <sys/ioctl.h>
-#endif
-#include <sys/uio.h>
-#ifndef linux
-#include <sys/protosw.h>
-#endif
-#include <sys/socket.h>
-#if defined(_KERNEL) && !defined(linux)
-# include <sys/systm.h>
-#endif
-#if !defined(__SVR4) && !defined(__svr4__)
-# ifndef linux
-#  include <sys/mbuf.h>
-# endif
-#else
-# include <sys/byteorder.h>
-# include <sys/dditypes.h>
-# include <sys/stream.h>
-# include <sys/kmem.h>
-#endif
-#if defined(KERNEL) && (__FreeBSD_version >= 300000)
-#include <sys/malloc.h>
-#endif
-
-#include <net/if.h>
-#ifdef sun
-#include <net/af.h>
-#endif
-#include <net/route.h>
-#include <netinet/in.h>
-#include <netinet/in_systm.h>
-#include <netinet/ip.h>
-#ifndef linux
-#include <netinet/ip_var.h>
-#endif
-#include <netinet/tcp.h>
-#include <netinet/udp.h>
-#include <netinet/ip_icmp.h>
-#include "netinet/ip_compat.h"
-#include <netinet/tcpip.h>
-#include "netinet/ip_fil.h"
-#include "netinet/ip_proxy.h"
-#include "netinet/ip_nat.h"
-#include "netinet/ip_frag.h"
-#include "netinet/ip_state.h"
-#include "netinet/ip_auth.h"
-
-static ipfr_t	*ipfr_heads[IPFT_SIZE];
-static ipfr_t	*ipfr_nattab[IPFT_SIZE];
-static ipfrstat_t ipfr_stats;
-static int	ipfr_inuse = 0;
-       int	fr_ipfrttl = 120;	/* 60 seconds */
-#ifdef _KERNEL
-extern	int	ipfr_timer_id;
-#endif
-#if	(SOLARIS || defined(__sgi)) && defined(_KERNEL)
-extern	kmutex_t	ipf_frag;
-extern	kmutex_t	ipf_natfrag;
-extern	kmutex_t	ipf_nat;
-#endif
-
-
-static ipfr_t *ipfr_new __P((ip_t *, fr_info_t *, int, ipfr_t **));
-static ipfr_t *ipfr_lookup __P((ip_t *, fr_info_t *, ipfr_t **));
-
-
-ipfrstat_t *ipfr_fragstats()
-{
-	ipfr_stats.ifs_table = ipfr_heads;
-	ipfr_stats.ifs_nattab = ipfr_nattab;
-	ipfr_stats.ifs_inuse = ipfr_inuse;
-	return &ipfr_stats;
-}
-
-
-/*
- * add a new entry to the fragment cache, registering it as having come
- * through this box, with the result of the filter operation.
- */
-static ipfr_t *ipfr_new(ip, fin, pass, table)
-ip_t *ip;
-fr_info_t *fin;
-int pass;
-ipfr_t *table[];
-{
-	ipfr_t	**fp, *fr, frag;
-	u_int	idx;
-
-	frag.ipfr_p = ip->ip_p;
-	idx = ip->ip_p;
-	frag.ipfr_id = ip->ip_id;
-	idx += ip->ip_id;
-	frag.ipfr_tos = ip->ip_tos;
-	frag.ipfr_src.s_addr = ip->ip_src.s_addr;
-	idx += ip->ip_src.s_addr;
-	frag.ipfr_dst.s_addr = ip->ip_dst.s_addr;
-	idx += ip->ip_dst.s_addr;
-	idx *= 127;
-	idx %= IPFT_SIZE;
-
-	/*
-	 * first, make sure it isn't already there...
-	 */
-	for (fp = &table[idx]; (fr = *fp); fp = &fr->ipfr_next)
-		if (!bcmp((char *)&frag.ipfr_src, (char *)&fr->ipfr_src,
-			  IPFR_CMPSZ)) {
-			ipfr_stats.ifs_exists++;
-			return NULL;
-		}
-
-	/*
-	 * allocate some memory, if possible, if not, just record that we
-	 * failed to do so.
-	 */
-	KMALLOC(fr, ipfr_t *, sizeof(*fr));
-	if (fr == NULL) {
-		ipfr_stats.ifs_nomem++;
-		return NULL;
-	}
-
-	/*
-	 * Instert the fragment into the fragment table, copy the struct used
-	 * in the search using bcopy rather than reassign each field.
-	 * Set the ttl to the default and mask out logging from "pass"
-	 */
-	if ((fr->ipfr_next = table[idx]))
-		table[idx]->ipfr_prev = fr;
-	fr->ipfr_prev = NULL;
-	fr->ipfr_data = NULL;
-	table[idx] = fr;
-	bcopy((char *)&frag.ipfr_src, (char *)&fr->ipfr_src, IPFR_CMPSZ);
-	fr->ipfr_ttl = fr_ipfrttl;
-	fr->ipfr_pass = pass & ~(FR_LOGFIRST|FR_LOG);
-	/*
-	 * Compute the offset of the expected start of the next packet.
-	 */
-	fr->ipfr_off = (ip->ip_off & 0x1fff) + (fin->fin_dlen >> 3);
-	ipfr_stats.ifs_new++;
-	ipfr_inuse++;
-	return fr;
-}
-
-
-int ipfr_newfrag(ip, fin, pass)
-ip_t *ip;
-fr_info_t *fin;
-int pass;
-{
-	ipfr_t	*ipf;
-
-	MUTEX_ENTER(&ipf_frag);
-	ipf = ipfr_new(ip, fin, pass, ipfr_heads);
-	MUTEX_EXIT(&ipf_frag);
-	return ipf ? 0 : -1;
-}
-
-
-int ipfr_nat_newfrag(ip, fin, pass, nat)
-ip_t *ip;
-fr_info_t *fin;
-int pass;
-nat_t *nat;
-{
-	ipfr_t	*ipf;
-
-	MUTEX_ENTER(&ipf_natfrag);
-	if ((ipf = ipfr_new(ip, fin, pass, ipfr_nattab))) {
-		ipf->ipfr_data = nat;
-		nat->nat_data = ipf;
-	}
-	MUTEX_EXIT(&ipf_natfrag);
-	return ipf ? 0 : -1;
-}
-
-
-/*
- * check the fragment cache to see if there is already a record of this packet
- * with its filter result known.
- */
-static ipfr_t *ipfr_lookup(ip, fin, table)
-ip_t *ip;
-fr_info_t *fin;
-ipfr_t *table[];
-{
-	ipfr_t	*f, frag;
-	u_int	idx;
-
-	/*
-	 * For fragments, we record protocol, packet id, TOS and both IP#'s
-	 * (these should all be the same for all fragments of a packet).
-	 *
-	 * build up a hash value to index the table with.
-	 */
-	frag.ipfr_p = ip->ip_p;
-	idx = ip->ip_p;
-	frag.ipfr_id = ip->ip_id;
-	idx += ip->ip_id;
-	frag.ipfr_tos = ip->ip_tos;
-	frag.ipfr_src.s_addr = ip->ip_src.s_addr;
-	idx += ip->ip_src.s_addr;
-	frag.ipfr_dst.s_addr = ip->ip_dst.s_addr;
-	idx += ip->ip_dst.s_addr;
-	idx *= 127;
-	idx %= IPFT_SIZE;
-
-	/*
-	 * check the table, careful to only compare the right amount of data
-	 */
-	for (f = table[idx]; f; f = f->ipfr_next)
-		if (!bcmp((char *)&frag.ipfr_src, (char *)&f->ipfr_src,
-			  IPFR_CMPSZ)) {
-			u_short	atoff, off;
-
-			if (f != table[idx]) {
-				/*
-				 * move fragment info. to the top of the list
-				 * to speed up searches.
-				 */
-				if ((f->ipfr_prev->ipfr_next = f->ipfr_next))
-					f->ipfr_next->ipfr_prev = f->ipfr_prev;
-				f->ipfr_next = table[idx];
-				table[idx]->ipfr_prev = f;
-				f->ipfr_prev = NULL;
-				table[idx] = f;
-			}
-			off = ip->ip_off;
-			atoff = off + (fin->fin_dlen >> 3);
-			/*
-			 * If we've follwed the fragments, and this is the
-			 * last (in order), shrink expiration time.
-			 */
-			if ((off & 0x1fff) == f->ipfr_off) {
-				if (!(off & IP_MF))
-					f->ipfr_ttl = 1;
-				else
-					f->ipfr_off = atoff;
-			}
-			ipfr_stats.ifs_hits++;
-			return f;
-		}
-	return NULL;
-}
-
-
-/*
- * functional interface for NAT lookups of the NAT fragment cache
- */
-nat_t *ipfr_nat_knownfrag(ip, fin)
-ip_t *ip;
-fr_info_t *fin;
-{
-	nat_t	*nat;
-	ipfr_t	*ipf;
-
-	MUTEX_ENTER(&ipf_natfrag);
-	ipf = ipfr_lookup(ip, fin, ipfr_nattab);
-	if (ipf) {
-		nat = ipf->ipfr_data;
-		/*
-		 * This is the last fragment for this packet.
-		 */
-		if (ipf->ipfr_ttl == 1) {
-			nat->nat_data = NULL;
-			ipf->ipfr_data = NULL;
-		}
-	} else
-		nat = NULL;
-	MUTEX_EXIT(&ipf_natfrag);
-	return nat;
-}
-
-
-/*
- * functional interface for normal lookups of the fragment cache
- */
-int ipfr_knownfrag(ip, fin)
-ip_t *ip;
-fr_info_t *fin;
-{
-	int	ret;
-	ipfr_t	*ipf;
-
-	MUTEX_ENTER(&ipf_frag);
-	ipf = ipfr_lookup(ip, fin, ipfr_heads);
-	ret = ipf ? ipf->ipfr_pass : 0;
-	MUTEX_EXIT(&ipf_frag);
-	return ret;
-}
-
-
-/*
- * forget any references to this external object.
- */
-void ipfr_forget(nat)
-void *nat;
-{
-	ipfr_t	*fr;
-	int	idx;
-
-	MUTEX_ENTER(&ipf_natfrag);
-	for (idx = IPFT_SIZE - 1; idx >= 0; idx--)
-		for (fr = ipfr_heads[idx]; fr; fr = fr->ipfr_next)
-			if (fr->ipfr_data == nat)
-				fr->ipfr_data = NULL;
-
-	MUTEX_EXIT(&ipf_natfrag);
-}
-
-
-/*
- * Free memory in use by fragment state info. kept.
- */
-void ipfr_unload()
-{
-	ipfr_t	**fp, *fr;
-	nat_t	*nat;
-	int	idx;
-
-	MUTEX_ENTER(&ipf_frag);
-	for (idx = IPFT_SIZE - 1; idx >= 0; idx--)
-		for (fp = &ipfr_heads[idx]; (fr = *fp); ) {
-			*fp = fr->ipfr_next;
-			KFREE(fr);
-		}
-	MUTEX_EXIT(&ipf_frag);
-
-	MUTEX_ENTER(&ipf_nat);
-	MUTEX_ENTER(&ipf_natfrag);
-	for (idx = IPFT_SIZE - 1; idx >= 0; idx--)
-		for (fp = &ipfr_nattab[idx]; (fr = *fp); ) {
-			*fp = fr->ipfr_next;
-			if ((nat = (nat_t *)fr->ipfr_data)) {
-				if (nat->nat_data == fr)
-					nat->nat_data = NULL;
-			}
-			KFREE(fr);
-		}
-	MUTEX_EXIT(&ipf_natfrag);
-	MUTEX_EXIT(&ipf_nat);
-}
-
-
-#ifdef	_KERNEL
-/*
- * Slowly expire held state for fragments.  Timeouts are set * in expectation
- * of this being called twice per second.
- */
-# if (BSD >= 199306) || SOLARIS || defined(__sgi)
-void ipfr_slowtimer()
-# else
-int ipfr_slowtimer()
-# endif
-{
-	ipfr_t	**fp, *fr;
-	nat_t	*nat;
-	int	s, idx;
-
-#ifdef __sgi
-	ipfilter_sgi_intfsync();
-#endif
-
-	SPL_NET(s);
-	MUTEX_ENTER(&ipf_frag);
-
-	/*
-	 * Go through the entire table, looking for entries to expire,
-	 * decreasing the ttl by one for each entry.  If it reaches 0,
-	 * remove it from the chain and free it.
-	 */
-	for (idx = IPFT_SIZE - 1; idx >= 0; idx--)
-		for (fp = &ipfr_heads[idx]; (fr = *fp); ) {
-			--fr->ipfr_ttl;
-			if (fr->ipfr_ttl == 0) {
-				if (fr->ipfr_prev)
-					fr->ipfr_prev->ipfr_next =
-					     fr->ipfr_next;
-				if (fr->ipfr_next)
-					fr->ipfr_next->ipfr_prev =
-					     fr->ipfr_prev;
-				*fp = fr->ipfr_next;
-				ipfr_stats.ifs_expire++;
-				ipfr_inuse--;
-				KFREE(fr);
-			} else
-				fp = &fr->ipfr_next;
-		}
-	MUTEX_EXIT(&ipf_frag);
-
-	/*
-	 * Same again for the NAT table, except that if the structure also
-	 * still points to a NAT structure, and the NAT structure points back
-	 * at the one to be free'd, NULL the reference from the NAT struct.
-	 * NOTE: We need to grab both mutex's early, and in this order so as
-	 * to prevent a deadlock if both try to expire at the same time.
-	 */
-	MUTEX_ENTER(&ipf_nat);
-	MUTEX_ENTER(&ipf_natfrag);
-	for (idx = IPFT_SIZE - 1; idx >= 0; idx--)
-		for (fp = &ipfr_nattab[idx]; (fr = *fp); ) {
-			--fr->ipfr_ttl;
-			if (fr->ipfr_ttl == 0) {
-				if (fr->ipfr_prev)
-					fr->ipfr_prev->ipfr_next =
-					     fr->ipfr_next;
-				if (fr->ipfr_next)
-					fr->ipfr_next->ipfr_prev =
-					     fr->ipfr_prev;
-				*fp = fr->ipfr_next;
-				ipfr_stats.ifs_expire++;
-				ipfr_inuse--;
-				if ((nat = (nat_t *)fr->ipfr_data)) {
-					if (nat->nat_data == fr)
-						nat->nat_data = NULL;
-				}
-				KFREE(fr);
-			} else
-				fp = &fr->ipfr_next;
-		}
-	MUTEX_EXIT(&ipf_natfrag);
-	MUTEX_EXIT(&ipf_nat);
-	SPL_X(s);
-	fr_timeoutstate();
-	ip_natexpire();
-	fr_authexpire();
-# if	SOLARIS
-	ipfr_timer_id = timeout(ipfr_slowtimer, NULL, drv_usectohz(500000));
-# else
-#  ifndef linux
-	ip_slowtimo();
-#  endif
-#  if (BSD < 199306) && !defined(__sgi)
-	return 0;
-#  endif
-# endif
-}
-#endif /* defined(_KERNEL) */