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A		 1/*
2 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
3 *
4 * @APPLE_LICENSE_HEADER_START@
5 *
6 * The contents of this file constitute Original Code as defined in and
7 * are subject to the Apple Public Source License Version 1.1 (the
8 * "License"). You may not use this file except in compliance with the
9 * License. Please obtain a copy of the License at
10 * http://www.apple.com/publicsource and read it before using this file.
11 *
12 * This Original Code and all software distributed under the License are
13 * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
14 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
15 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
17 * License for the specific language governing rights and limitations
18 * under the License.
19 *
20 * @APPLE_LICENSE_HEADER_END@
21 */
22/*
23 * Copyright (C) 1993-1997 by Darren Reed.
24 *
25 * Redistribution and use in source and binary forms are permitted
26 * provided that this notice is preserved and due credit is given
27 * to the original author and the contributors.
28 *
29 * @(#)ip_fil.h 1.35 6/5/96
30 * $Id: ip_fil.h,v 1.3 2000/11/22 01:12:12 zarzycki Exp $
31 */
32
33#ifndef __IP_FIL_H__
34#define __IP_FIL_H__
35
36/*
37 * Pathnames for various IP Filter control devices. Used by LKM
38 * and userland, so defined here.
39 */
40#define IPNAT_NAME "/dev/ipnat"
41#define IPSTATE_NAME "/dev/ipstate"
42#define IPAUTH_NAME "/dev/ipauth"
43
44#ifndef SOLARIS
45#define SOLARIS (defined(sun) && (defined(__svr4__) || defined(__SVR4)))
46#endif
47
48#if defined(KERNEL) && !defined(_KERNEL)
49#define _KERNEL
50#endif
51
52#ifndef __P
53# if __STDC__
54# define __P(x) x
55# else
56# define __P(x) ()
57# endif
58#endif
59
60#if defined(__STDC__) || defined(__GNUC__)
61#define SIOCADAFR _IOW('r', 60, struct frentry)
62#define SIOCRMAFR _IOW('r', 61, struct frentry)
63#define SIOCSETFF _IOW('r', 62, u_int)
64#define SIOCGETFF _IOR('r', 63, u_int)
65#define SIOCGETFS _IOR('r', 64, struct friostat)
66#define SIOCIPFFL _IOWR('r', 65, int)
67#define SIOCIPFFB _IOR('r', 66, int)
68#define SIOCADIFR _IOW('r', 67, struct frentry)
69#define SIOCRMIFR _IOW('r', 68, struct frentry)
70#define SIOCSWAPA _IOR('r', 69, u_int)
71#define SIOCINAFR _IOW('r', 70, struct frentry)
72#define SIOCINIFR _IOW('r', 71, struct frentry)
73#define SIOCFRENB _IOW('r', 72, u_int)
74#define SIOCFRSYN _IOW('r', 73, u_int)
75#define SIOCFRZST _IOWR('r', 74, struct friostat)
76#define SIOCZRLST _IOWR('r', 75, struct frentry)
77#define SIOCAUTHW _IOWR('r', 76, struct fr_info)
78#define SIOCAUTHR _IOWR('r', 77, struct fr_info)
79#define SIOCATHST _IOWR('r', 78, struct fr_authstat)
80#else
81#define SIOCADAFR _IOW(r, 60, struct frentry)
82#define SIOCRMAFR _IOW(r, 61, struct frentry)
83#define SIOCSETFF _IOW(r, 62, u_int)
84#define SIOCGETFF _IOR(r, 63, u_int)
85#define SIOCGETFS _IOR(r, 64, struct friostat)
86#define SIOCIPFFL _IOWR(r, 65, int)
87#define SIOCIPFFB _IOR(r, 66, int)
88#define SIOCADIFR _IOW(r, 67, struct frentry)
89#define SIOCRMIFR _IOW(r, 68, struct frentry)
90#define SIOCSWAPA _IOR(r, 69, u_int)
91#define SIOCINAFR _IOW(r, 70, struct frentry)
92#define SIOCINIFR _IOW(r, 71, struct frentry)
93#define SIOCFRENB _IOW(r, 72, u_int)
94#define SIOCFRSYN _IOW(r, 73, u_int)
95#define SIOCFRZST _IOWR(r, 74, struct friostat)
96#define SIOCZRLST _IOWR(r, 75, struct frentry)
97#define SIOCAUTHW _IOWR(r, 76, struct fr_info)
98#define SIOCAUTHR _IOWR(r, 77, struct fr_info)
99#define SIOCATHST _IOWR(r, 78, struct fr_authstat)
100#endif
101#define SIOCADDFR SIOCADAFR
102#define SIOCDELFR SIOCRMAFR
103#define SIOCINSFR SIOCINAFR
104
105typedef struct fr_ip {
106 u_int fi_v:4; /* IP version */
107 u_int fi_fl:4; /* packet flags */
108 u_char fi_tos;
109 u_char fi_ttl;
110 u_char fi_p;
111 struct in_addr fi_src;
112 struct in_addr fi_dst;
113 u_32_t fi_optmsk; /* bitmask composed from IP options */
114 u_short fi_secmsk; /* bitmask composed from IP security options */
115 u_short fi_auth;
116} fr_ip_t;
117
118#define FI_OPTIONS (FF_OPTIONS >> 24)
119#define FI_TCPUDP (FF_TCPUDP >> 24) /* TCP/UCP implied comparison*/
120#define FI_FRAG (FF_FRAG >> 24)
121#define FI_SHORT (FF_SHORT >> 24)
122
123typedef struct fr_info {
124 struct fr_ip fin_fi;
125 u_short fin_data[2];
126 u_short fin_out;
127 u_short fin_hlen;
128 u_char fin_tcpf;
129 u_char fin_icode; /* From here on is packet specific */
130 u_short fin_rule;
131 u_short fin_group;
132 u_short fin_dlen;
133 u_short fin_id;
134 void *fin_ifp;
135 struct frentry *fin_fr;
136 char *fin_dp; /* start of data past IP header */
137 void *fin_mp;
138} fr_info_t;
139
140/*
141 * Size for compares on fr_info structures
142 */
143#define FI_CSIZE (sizeof(struct fr_ip) + sizeof(u_short) * 4 + \
144 sizeof(u_char))
145/*
146 * Size for copying cache fr_info structure
147 */
148#define FI_COPYSIZE (sizeof(fr_info_t) - sizeof(void *) * 2)
149
150typedef struct frdest {
151 void *fd_ifp;
152 struct in_addr fd_ip;
153 char fd_ifname[IFNAMSIZ];
154} frdest_t;
155
156typedef struct frentry {
157 struct frentry *fr_next;
158 u_short fr_group; /* group to which this rule belongs */
159 u_short fr_grhead; /* group # which this rule starts */
160 struct frentry *fr_grp;
161 int fr_ref; /* reference count - for grouping */
162 void *fr_ifa;
163 /*
164 * These are only incremented when a packet matches this rule and
165 * it is the last match
166 */
167 U_QUAD_T fr_hits;
168 U_QUAD_T fr_bytes;
169 /*
170 * Fields after this may not change whilst in the kernel.
171 */
172 struct fr_ip fr_ip;
173 struct fr_ip fr_mip; /* mask structure */
174
175 u_char fr_tcpfm; /* tcp flags mask */
176 u_char fr_tcpf; /* tcp flags */
177
178 u_short fr_icmpm; /* data for ICMP packets (mask) */
179 u_short fr_icmp;
180
181 u_char fr_scmp; /* data for port comparisons */
182 u_char fr_dcmp;
183 u_short fr_dport;
184 u_short fr_sport;
185 u_short fr_stop; /* top port for <> and >< */
186 u_short fr_dtop; /* top port for <> and >< */
187 u_32_t fr_flags; /* per-rule flags && options (see below) */
188 int fr_skip; /* # of rules to skip */
189 int (*fr_func) __P((int, ip_t *, fr_info_t *)); /* call this function */
190 char fr_icode; /* return ICMP code */
191 char fr_ifname[IFNAMSIZ];
192 struct frdest fr_tif; /* "to" interface */
193 struct frdest fr_dif; /* duplicate packet interfaces */
194} frentry_t;
195
196#define fr_proto fr_ip.fi_p
197#define fr_ttl fr_ip.fi_ttl
198#define fr_tos fr_ip.fi_tos
199#define fr_dst fr_ip.fi_dst
200#define fr_src fr_ip.fi_src
201#define fr_dmsk fr_mip.fi_dst
202#define fr_smsk fr_mip.fi_src
203
204#ifndef offsetof
205#define offsetof(t,m) (int)((&((t *)0L)->m))
206#endif
207#define FR_CMPSIZ (sizeof(struct frentry) - offsetof(frentry_t, fr_ip))
208
209/*
210 * fr_flags
211 */
212#define FR_BLOCK 0x00001 /* do not allow packet to pass */
213#define FR_PASS 0x00002 /* allow packet to pass */
214#define FR_OUTQUE 0x00004 /* outgoing packets */
215#define FR_INQUE 0x00008 /* ingoing packets */
216#define FR_LOG 0x00010 /* Log */
217#define FR_LOGB 0x00011 /* Log-fail */
218#define FR_LOGP 0x00012 /* Log-pass */
219#define FR_LOGBODY 0x00020 /* Log the body */
220#define FR_LOGFIRST 0x00040 /* Log the first byte if state held */
221#define FR_RETRST 0x00080 /* Return TCP RST packet - reset connection */
222#define FR_RETICMP 0x00100 /* Return ICMP unreachable packet */
223#define FR_NOMATCH 0x00200 /* no match occured */
224#define FR_ACCOUNT 0x00400 /* count packet bytes */
225#define FR_KEEPFRAG 0x00800 /* keep fragment information */
226#define FR_KEEPSTATE 0x01000 /* keep `connection' state information */
227#define FR_INACTIVE 0x02000
228#define FR_QUICK 0x04000 /* match & stop processing list */
229#define FR_FASTROUTE 0x08000 /* bypass normal routing */
230#define FR_CALLNOW 0x10000 /* call another function (fr_func) if matches */
231#define FR_DUP 0x20000 /* duplicate packet */
232#define FR_LOGORBLOCK 0x40000 /* block the packet if it can't be logged */
233#define FR_NOTSRCIP 0x80000 /* not the src IP# */
234#define FR_NOTDSTIP 0x100000 /* not the dst IP# */
235#define FR_AUTH 0x200000 /* use authentication */
236#define FR_PREAUTH 0x400000 /* require preauthentication */
237
238#define FR_LOGMASK (FR_LOG|FR_LOGP|FR_LOGB)
239
240/*
241 * These correspond to #define's for FI_* and are stored in fr_flags
242 */
243#define FF_OPTIONS 0x01000000
244#define FF_TCPUDP 0x02000000
245#define FF_FRAG 0x04000000
246#define FF_SHORT 0x08000000
247/*
248 * recognized flags for SIOCGETFF and SIOCSETFF, and get put in fr_flags
249 */
250#define FF_LOGPASS 0x10000000
251#define FF_LOGBLOCK 0x20000000
252#define FF_LOGNOMATCH 0x40000000
253#define FF_LOGGING (FF_LOGPASS|FF_LOGBLOCK|FF_LOGNOMATCH)
254#define FF_BLOCKNONIP 0x80000000 /* Solaris2 Only */
255
256#define FR_NONE 0
257#define FR_EQUAL 1
258#define FR_NEQUAL 2
259#define FR_LESST 3
260#define FR_GREATERT 4
261#define FR_LESSTE 5
262#define FR_GREATERTE 6
263#define FR_OUTRANGE 7
264#define FR_INRANGE 8
265
266typedef struct filterstats {
267 u_long fr_pass; /* packets allowed */
268 u_long fr_block; /* packets denied */
269 u_long fr_nom; /* packets which don't match any rule */
270 u_long fr_ppkl; /* packets allowed and logged */
271 u_long fr_bpkl; /* packets denied and logged */
272 u_long fr_npkl; /* packets unmatched and logged */
273 u_long fr_pkl; /* packets logged */
274 u_long fr_skip; /* packets to be logged but buffer full */
275 u_long fr_ret; /* packets for which a return is sent */
276 u_long fr_acct; /* packets for which counting was performed */
277 u_long fr_bnfr; /* bad attempts to allocate fragment state */
278 u_long fr_nfr; /* new fragment state kept */
279 u_long fr_cfr; /* add new fragment state but complete pkt */
280 u_long fr_bads; /* bad attempts to allocate packet state */
281 u_long fr_ads; /* new packet state kept */
282 u_long fr_chit; /* cached hit */
283 u_long fr_tcpbad; /* TCP checksum check failures */
284 u_long fr_pull[2]; /* good and bad pullup attempts */
285#if SOLARIS
286 u_long fr_bad; /* bad IP packets to the filter */
287 u_long fr_notip; /* packets passed through no on ip queue */
288 u_long fr_drop; /* packets dropped - no info for them! */
289#endif
290} filterstats_t;
291
292/*
293 * For SIOCGETFS
294 */
295typedef struct friostat {
296 struct filterstats f_st[2];
297 struct frentry *f_fin[2];
298 struct frentry *f_fout[2];
299 struct frentry *f_acctin[2];
300 struct frentry *f_acctout[2];
301 struct frentry *f_auth;
302 u_long f_froute[2];
303 int f_active;
304} friostat_t;
305
306typedef struct optlist {
307 u_short ol_val;
308 int ol_bit;
309} optlist_t;
310
311
312/*
313 * Group list structure.
314 */
315typedef struct frgroup {
316 u_short fg_num;
317 struct frgroup *fg_next;
318 struct frentry *fg_head;
319 struct frentry **fg_start;
320} frgroup_t;
321
322
323/*
324 * Log structure. Each packet header logged is prepended by one of these.
325 * Following this in the log records read from the device will be an ipflog
326 * structure which is then followed by any packet data.
327 */
328typedef struct iplog {
329 u_long ipl_magic;
330 u_long ipl_sec;
331 u_long ipl_usec;
332 u_int ipl_len;
333 u_int ipl_count;
334 size_t ipl_dsize;
335 struct iplog *ipl_next;
336} iplog_t;
337
338#define IPL_MAGIC 0x49504c4d /* 'IPLM' */
339
340typedef struct ipflog {
341#if (defined(NetBSD) && (NetBSD <= 1991011) && (NetBSD >= 199603)) || \
342 (defined(OpenBSD) && (OpenBSD >= 199603))
343 u_char fl_ifname[IFNAMSIZ];
344#else
345 u_int fl_unit;
346 u_char fl_ifname[4];
347#endif
348 u_char fl_plen; /* extra data after hlen */
349 u_char fl_hlen; /* length of IP headers saved */
350 u_short fl_rule; /* assume never more than 64k rules, total */
351 u_short fl_group;
352 u_32_t fl_flags;
353} ipflog_t;
354
355
356#ifndef ICMP_UNREACH_FILTER
357#define ICMP_UNREACH_FILTER 13
358#endif
359
360#ifndef IPF_LOGGING
361#define IPF_LOGGING 0
362#endif
363#ifndef IPF_DEFAULT_PASS
364#define IPF_DEFAULT_PASS FR_PASS
365#endif
366
367#define IPMINLEN(i, h) ((i)->ip_len >= ((i)->ip_hl * 4 + sizeof(struct h)))
368#define IPLLOGSIZE 8192
369
370/*
371 * Device filenames for reading log information. Use ipf on Solaris2 because
372 * ipl is already a name used by something else.
373 */
374#ifndef IPL_NAME
375# if SOLARIS
376# define IPL_NAME "/dev/ipf"
377# else
378# define IPL_NAME "/dev/ipl"
379# endif
380#endif
381#define IPL_NAT IPNAT_NAME
382#define IPL_STATE IPSTATE_NAME
383#define IPL_AUTH IPAUTH_NAME
384
385#define IPL_LOGIPF 0 /* Minor device #'s for accessing logs */
386#define IPL_LOGNAT 1
387#define IPL_LOGSTATE 2
388#define IPL_LOGAUTH 3
389#define IPL_LOGMAX 3
390
391#if !defined(CDEV_MAJOR) && defined (__FreeBSD_version) && \
392 (__FreeBSD_version >= 220000)
393# define CDEV_MAJOR 79
394#endif
395
396#ifndef _KERNEL
397struct ifnet;
398extern int fr_check __P((ip_t *, int, void *, int, mb_t **));
399extern int (*fr_checkp) __P((ip_t *, int, void *, int, mb_t **));
400extern int send_reset __P((ip_t *, struct ifnet *));
401extern int icmp_error __P((ip_t *, struct ifnet *));
402extern int ipf_log __P((void));
403extern void ipfr_fastroute __P((ip_t *, fr_info_t *, frdest_t *));
404extern struct ifnet *get_unit __P((char *));
405# define FR_SCANLIST(p, ip, fi, m) fr_scanlist(p, ip, fi, m)
406# if defined(__NetBSD__) || defined(__OpenBSD__) || \
407 (_BSDI_VERSION >= 199701) || (__FreeBSD_version >= 300003)
408extern int iplioctl __P((dev_t, u_long, caddr_t, int));
409# else
410extern int iplioctl __P((dev_t, int, caddr_t, int));
411# endif
412extern int iplopen __P((dev_t, int));
413extern int iplclose __P((dev_t, int));
414#else /* #ifndef _KERNEL */
415# if defined(__NetBSD__) && defined(PFIL_HOOKS)
416extern int ipfilterattach __P((int));
417# endif
418extern int iplattach __P((void));
419extern int ipl_enable __P((void));
420extern int ipl_disable __P((void));
421extern void ipflog_init __P((void));
422extern int ipflog_clear __P((int));
423extern int ipflog_read __P((int, struct uio *));
424extern int ipflog __P((u_int, ip_t *, fr_info_t *, mb_t *));
425extern int ipllog __P((int, u_long, void **, size_t *, int *, int));
426# if SOLARIS
427extern int fr_check __P((ip_t *, int, void *, int, qif_t *, mb_t **));
428extern int (*fr_checkp) __P((ip_t *, int, void *,
429 int, qif_t *, mb_t **));
430extern int icmp_error __P((ip_t *, int, int, qif_t *,
431 struct in_addr));
432extern int iplioctl __P((dev_t, int, int, int, cred_t *, int *));
433extern int iplopen __P((dev_t *, int, int, cred_t *));
434extern int iplclose __P((dev_t, int, int, cred_t *));
435extern int ipfsync __P((void));
436extern int send_reset __P((ip_t *, qif_t *));
437extern int ipfr_fastroute __P((qif_t *, ip_t *, mblk_t *, mblk_t **,
438 fr_info_t *, frdest_t *));
439extern void copyin_mblk __P((mblk_t *, int, int, char *));
440extern void copyout_mblk __P((mblk_t *, int, int, char *));
441extern int fr_qin __P((queue_t *, mblk_t *));
442extern int fr_qout __P((queue_t *, mblk_t *));
443# if IPFILTER_LOG
444extern int iplread __P((dev_t, struct uio *, cred_t *));
445# endif
446# else /* SOLARIS */
447extern int fr_check __P((ip_t *, int, void *, int, mb_t **));
448extern int (*fr_checkp) __P((ip_t *, int, void *, int, mb_t **));
449# if linux
450extern int send_reset __P((tcpiphdr_t *, struct ifnet *));
451# else
452extern int send_reset __P((tcpiphdr_t *));
453# endif
454extern void ipfr_fastroute __P((mb_t *, fr_info_t *, frdest_t *));
455extern size_t mbufchainlen __P((mb_t *));
456# if __sgi
457# include <sys/cred.h>
458extern int iplioctl __P((dev_t, int, caddr_t, int, cred_t *, int *));
459extern int iplopen __P((dev_t *, int, int, cred_t *));
460extern int iplclose __P((dev_t, int, int, cred_t *));
461extern int iplread __P((dev_t, struct uio *, cred_t *));
462extern int ipfsync __P((void));
463extern int ipfilter_sgi_attach __P((void));
464extern void ipfilter_sgi_detach __P((void));
465extern void ipfilter_sgi_intfsync __P((void));
466# else
467# if IPFILTER_LKM
468extern int iplidentify __P((char *));
469# endif
470# if (_BSDI_VERSION >= 199510) || (__FreeBSD_version >= 220000) || \
471 (NetBSD >= 199511)
472# if defined(__NetBSD__) || (_BSDI_VERSION >= 199701) || \
473 (__FreeBSD_version >= 300003)
474extern int iplioctl __P((dev_t, u_long, caddr_t, int, struct proc *));
475# else
476extern int iplioctl __P((dev_t, int, caddr_t, int, struct proc *));
477# endif
478extern int iplopen __P((dev_t, int, int, struct proc *));
479extern int iplclose __P((dev_t, int, int, struct proc *));
480# else
481# if defined(__OpenBSD__)
482extern int iplioctl __P((dev_t, u_long, caddr_t, int));
483# else /* __OpenBSD__ */
484# ifndef linux
485extern int iplioctl __P((dev_t, int, caddr_t, int));
486# else
487extern int iplioctl(struct inode *, struct file *, u_int, u_long);
488# endif
489# endif /* __OpenBSD__ */
490# ifndef linux
491extern int iplopen __P((dev_t, int));
492extern int iplclose __P((dev_t, int));
493# else
494extern int iplopen __P((struct inode *, struct file *));
495extern void iplclose __P((struct inode *, struct file *));
496# endif /* !linux */
497# endif /* (_BSDI_VERSION >= 199510) */
498# if BSD >= 199306
499extern int iplread __P((dev_t, struct uio *, int));
500# else
501# ifndef linux
502extern int iplread __P((dev_t, struct uio *));
503# else
504extern int iplread(struct inode *, struct file *, char *, int);
505# endif /* !linux */
506# endif /* BSD >= 199306 */
507# endif /* __ sgi */
508# endif /* SOLARIS */
509#endif /* #ifndef _KERNEL */
510
511/*
512 * Post NetBSD 1.2 has the PFIL interface for packet filters. This turns
513 * on those hooks. We don't need any special mods in non-IP Filter code
514 * with this!
515 */
516#if (defined(NetBSD) && (NetBSD > 199609) && (NetBSD <= 1991011)) || \
517 (defined(NetBSD1_2) && NetBSD1_2 > 1)
518# define NETBSD_PF
519#endif
520
521extern int ipldetach __P((void));
522extern u_short fr_tcpsum __P((mb_t *, ip_t *, tcphdr_t *, int));
523#define FR_SCANLIST(p, ip, fi, m) fr_scanlist(p, ip, fi, m)
524extern int fr_scanlist __P((int, ip_t *, fr_info_t *, void *));
525extern u_short ipf_cksum __P((u_short *, int));
526extern int fr_copytolog __P((int, char *, int));
527extern void frflush __P((int, int *));
528extern frgroup_t *fr_addgroup __P((u_short, frentry_t *, int, int));
529extern frgroup_t *fr_findgroup __P((u_short, u_32_t, int, int, frgroup_t ***));
530extern void fr_delgroup __P((u_short, u_32_t, int, int));
531extern int ipl_unreach;
532extern int ipl_inited;
533extern u_long ipl_frouteok[2];
534extern int fr_pass;
535extern int fr_flags;
536extern int fr_active;
537extern fr_info_t frcache[2];
538#if IPFILTER_LOG
539extern iplog_t **iplh[IPL_LOGMAX+1], *iplt[IPL_LOGMAX+1];
540extern int iplused[IPL_LOGMAX + 1];
541#endif
542extern struct frentry *ipfilter[2][2], *ipacct[2][2];
543extern struct frgroup *ipfgroups[3][2];
544extern struct filterstats frstats[];
545
546#endif /* __IP_FIL_H__ */
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