174 lines
4.2 KiB
C
174 lines
4.2 KiB
C
/*
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* Copyright (c) 1990, 1991, 1992, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that: (1) source code distributions
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* retain the above copyright notice and this paragraph in its entirety, (2)
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* distributions including binary code include the above copyright notice and
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* this paragraph in its entirety in the documentation or other materials
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* provided with the distribution, and (3) all advertising materials mentioning
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* features or use of this software display the following acknowledgement:
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* ``This product includes software developed by the University of California,
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* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
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* the University nor the names of its contributors may be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*
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* @(#) $Header: gencode.h,v 1.20 94/06/12 14:29:30 leres Exp $ (LBL)
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*/
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/*
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* filter.h must be included before this file.
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*/
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/* Address qualifers. */
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#define Q_HOST 1
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#define Q_NET 2
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#define Q_PORT 3
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#define Q_GATEWAY 4
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#define Q_PROTO 5
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/* Protocol qualifiers. */
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#define Q_LINK 1
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#define Q_IP 2
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#define Q_ARP 3
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#define Q_RARP 4
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#define Q_TCP 5
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#define Q_UDP 6
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#define Q_ICMP 7
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#define Q_DECNET 8
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#define Q_LAT 9
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#define Q_MOPRC 10
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#define Q_MOPDL 11
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/* Directional qualifers. */
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#define Q_SRC 1
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#define Q_DST 2
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#define Q_OR 3
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#define Q_AND 4
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#define Q_DEFAULT 0
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#define Q_UNDEF 255
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struct stmt {
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int code;
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long k;
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};
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struct slist {
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struct stmt s;
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struct slist *next;
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};
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/*
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* A bit vector to represent definition sets. We assume TOT_REGISTERS
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* is smaller than 8*sizeof(atomset).
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*/
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typedef u_long atomset;
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#define ATOMMASK(n) (1 << (n))
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#define ATOMELEM(d, n) (d & ATOMMASK(n))
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/*
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* An unbounded set.
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*/
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typedef u_long *uset;
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/*
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* Total number of atomic entities, including accumulator (A) and index (X).
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* We treat all these guys similarly during flow analysis.
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*/
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#define N_ATOMS (BPF_MEMWORDS+2)
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struct edge {
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int id;
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int code;
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uset edom;
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struct block *succ;
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struct block *pred;
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struct edge *next; /* link list of incoming edges for a node */
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};
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struct block {
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int id;
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struct slist *stmts; /* side effect stmts */
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struct stmt s; /* branch stmt */
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int mark;
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int level;
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int offset;
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int sense;
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struct edge et;
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struct edge ef;
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struct block *head;
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struct block *link; /* link field used by optimizer */
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uset dom;
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uset closure;
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struct edge *in_edges;
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atomset def, kill;
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atomset in_use;
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atomset out_use;
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long oval;
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long val[N_ATOMS];
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};
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struct arth {
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struct block *b; /* protocol checks */
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struct slist *s; /* stmt list */
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int regno; /* virtual register number of result */
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};
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struct qual {
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unsigned char addr;
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unsigned char proto;
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unsigned char dir;
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unsigned char pad;
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};
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#ifndef __GNUC__
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#define volatile
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#endif
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struct arth *gen_loadi(int);
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struct arth *gen_load(int, struct arth *, int);
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struct arth *gen_loadlen(void);
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struct arth *gen_neg(struct arth *);
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struct arth *gen_arth(int, struct arth *, struct arth *);
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void gen_and(struct block *, struct block *);
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void gen_or(struct block *, struct block *);
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void gen_not(struct block *);
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struct block *gen_scode(char *, struct qual);
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struct block *gen_ecode(u_char *, struct qual);
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struct block *gen_ncode(u_long, struct qual);
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struct block *gen_proto_abbrev(int);
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struct block *gen_relation(int, struct arth *, struct arth *, int);
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struct block *gen_less(int);
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struct block *gen_greater(int);
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struct block *gen_byteop(int, int, int);
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struct block *gen_broadcast(int);
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struct block *gen_multicast(int);
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struct block *gen_inbound(int);
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void bpf_optimize(struct block **);
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volatile void bpf_error(char *, ...);
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void finish_parse(struct block *);
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char *sdup(char *);
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struct bpf_insn *icode_to_fcode(struct block *, int *);
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int pcap_parse(void);
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void lex_init(char *);
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void sappend(struct slist *, struct slist *);
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/* XXX */
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#define JT(b) ((b)->et.succ)
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#define JF(b) ((b)->ef.succ)
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