93 lines
2.5 KiB
C
93 lines
2.5 KiB
C
/*
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* Written by Toshiharu OHNO (tony-o@iij.ad.jp)
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*
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* Copyright (C) 1993, Internet Initiative Japan, Inc. All rights reserverd.
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*
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* Redistribution and use in source and binary forms are permitted
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* provided that the above copyright notice and this paragraph are
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* duplicated in all such forms and that any documentation,
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* advertising materials, and other materials related to such
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* distribution and use acknowledge that the software was developed
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* by the Internet Initiative Japan. The name of the
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* IIJ may not be used to endorse or promote products derived
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* from this software without specific prior written permission.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
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* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*
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* $Id: filter.h,v 1.14 1999/01/28 01:56:31 brian Exp $
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*
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* TODO:
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*/
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/* Actions */
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#define A_NONE 0
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#define A_PERMIT 1
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#define A_DENY 2
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#define A_MASK 3
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#define A_UHOST 4
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#define A_UPORT 8
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/* Known protocols */
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#define P_NONE 0
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#define P_TCP 1
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#define P_UDP 2
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#define P_ICMP 3
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/* Operations */
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#define OP_NONE 0
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#define OP_EQ 1
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#define OP_GT 2
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#define OP_LT 4
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/* srctype or dsttype */
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#define T_ADDR 0
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#define T_MYADDR 1
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#define T_HISADDR 2
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struct filterent {
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int action; /* Filtering action */
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unsigned srctype : 2; /* T_ value of src */
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struct in_range src; /* Source address */
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unsigned dsttype : 2; /* T_ value of dst */
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struct in_range dst; /* Destination address */
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int proto; /* Protocol */
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struct {
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short srcop;
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u_short srcport;
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short dstop;
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u_short dstport;
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unsigned estab : 1;
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unsigned syn : 1;
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unsigned finrst : 1;
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} opt;
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};
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#define MAXFILTERS 40 /* in each filter set */
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struct filter {
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struct filterent rule[MAXFILTERS]; /* incoming packet filter */
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const char *name;
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unsigned fragok : 1;
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unsigned logok : 1;
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};
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#define FL_IN 0
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#define FL_OUT 1
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#define FL_DIAL 2
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#define FL_KEEP 3
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struct ipcp;
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struct cmdargs;
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extern int ParseAddr(struct ipcp *, const char *, struct in_addr *,
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struct in_addr *, int *);
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extern int filter_Show(struct cmdargs const *);
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extern int filter_Set(struct cmdargs const *);
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extern const char * filter_Action2Nam(int);
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extern const char *filter_Proto2Nam(int);
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extern const char *filter_Op2Nam(int);
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extern struct in_addr bits2mask(int);
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extern void filter_AdjustAddr(struct filter *, struct in_addr *,
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struct in_addr *);
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