mlf_rule.c revision 145519 
12490Sjkh/*	$FreeBSD: head/contrib/ipfilter/mlf_rule.c 145519 2005-04-25 18:20:15Z darrenr $	*/
22490Sjkh
32490Sjkh/*
42490Sjkh * Copyright (C) 1993-2001 by Darren Reed.
52490Sjkh *
62490Sjkh * See the IPFILTER.LICENCE file for details on licencing.
72490Sjkh */
82490Sjkh/*
92490Sjkh * 29/12/94 Added code from Marc Huber <huber@fzi.de> to allow it to allocate
102490Sjkh * its own major char number! Way cool patch!
112490Sjkh */
122490Sjkh
132490Sjkh
142490Sjkh#include <sys/param.h>
152490Sjkh
162490Sjkh#if defined(__FreeBSD__) && (__FreeBSD__ > 1)
172490Sjkh# ifdef	IPFILTER_LKM
182490Sjkh#  include <osreldate.h>
192490Sjkh#  define	ACTUALLY_LKM_NOT_KERNEL
202490Sjkh# else
212490Sjkh#  include <sys/osreldate.h>
222490Sjkh# endif
232490Sjkh#endif
242490Sjkh#include <sys/systm.h>
252490Sjkh#if defined(__FreeBSD_version) && (__FreeBSD_version >= 220000)
262490Sjkh# include <sys/conf.h>
272490Sjkh# include <sys/kernel.h>
282490Sjkh# ifdef DEVFS
292490Sjkh#  include <sys/devfsext.h>
302490Sjkh# endif /*DEVFS*/
312490Sjkh#endif
322490Sjkh#include <sys/conf.h>
332490Sjkh#include <sys/file.h>
342490Sjkh#if defined(__FreeBSD_version) && (__FreeBSD_version >= 300000)
352490Sjkh# include <sys/lock.h>
362490Sjkh#endif
37#include <sys/stat.h>
38#include <sys/proc.h>
39#include <sys/kernel.h>
40#include <sys/vnode.h>
41#include <sys/namei.h>
42#include <sys/malloc.h>
43#include <sys/mount.h>
44#include <sys/exec.h>
45#include <sys/mbuf.h>
46#if	BSD >= 199506
47# include <sys/sysctl.h>
48#endif
49#if (__FreeBSD_version >= 300000)
50# include <sys/socket.h>
51#endif
52#if (__FreeBSD_version >= 199511)
53#include <net/if.h>
54#include <netinet/in_systm.h>
55#include <netinet/in.h>
56#include <netinet/ip.h>
57#include <net/route.h>
58#include <netinet/ip_var.h>
59#include <netinet/tcp.h>
60#include <netinet/tcpip.h>
61#endif
62#if (__FreeBSD__ > 1)
63# include <sys/sysent.h>
64#endif
65#include <sys/lkm.h>
66#include "netinet/ip_compat.h"
67#include "netinet/ip_fil.h"
68#include "netinet/ip_rules.h"
69
70
71int	xxxinit __P((struct lkm_table *, int, int));
72
73#if !defined(__FreeBSD_version) || (__FreeBSD_version < 220000)
74MOD_DEV(IPL_VERSION, LM_DT_CHAR, -1, &ipldevsw);
75#endif
76
77static int ipfrule_ioctl __P((struct lkm_table *, int));
78
79#if defined(__FreeBSD_version) && (__FreeBSD_version < 220000)
80
81int xxxinit(lkmtp, cmd, ver)
82struct lkm_table *lkmtp;
83int cmd, ver;
84{
85	DISPATCH(lkmtp, cmd, ver, ipfrule_ioctl, ipfrule_ioctl, ipfrule_ioctl);
86}
87#else	/* __FREEBSD_version >= 220000 */
88# ifdef	IPFILTER_LKM
89#  include <sys/exec.h>
90
91#  if (__FreeBSD_version >= 300000)
92MOD_MISC(ipfrule);
93#  else
94MOD_DECL(ipfrule);
95
96
97static struct lkm_misc _module = {
98	LM_MISC,
99	LKM_VERSION,
100	"IP Filter rules",
101	0,
102};
103#  endif
104
105
106int ipfrule __P((struct lkm_table *, int, int));
107
108
109int ipfrule(lkmtp, cmd, ver)
110struct lkm_table *lkmtp;
111int cmd, ver;
112{
113#  if (__FreeBSD_version >= 300000)
114	MOD_DISPATCH(ipfrule, lkmtp, cmd, ver, ipfrule_ioctl, ipfrule_ioctl,
115		     ipfrule_ioctl);
116#  else
117	DISPATCH(lkmtp, cmd, ver, ipfrule_ioctl, ipfrule_ioctl, ipfrule_ioctl);
118#  endif
119}
120# endif /* IPFILTER_LKM */
121
122
123int ipfrule_load(lkmtp, cmd)
124struct lkm_table *lkmtp;
125int cmd;
126{
127	return ipfrule_add();
128}
129
130
131int ipfrule_unload(lkmtp, cmd)
132struct lkm_table *lkmtp;
133int cmd;
134{
135	return ipfrule_remove();
136}
137
138
139static int ipfrule_ioctl(lkmtp, cmd)
140struct lkm_table *lkmtp;
141int cmd;
142{
143	int err = 0;
144
145	switch (cmd)
146	{
147	case LKM_E_LOAD :
148		if (lkmexists(lkmtp))
149			return EEXIST;
150
151		err = ipfrule_load(lkmtp, cmd);
152		if (!err)
153			fr_refcnt++;
154		break;
155	case LKM_E_UNLOAD :
156		err = ipfrule_unload(lkmtp, cmd);
157		if (!err)
158			fr_refcnt--;
159		break;
160	case LKM_E_STAT :
161		break;
162	default:
163		err = EIO;
164		break;
165	}
166	return err;
167}
168#endif /* _FreeBSD_version */
169