gencode.h
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上传日期:2021-02-23
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- /*
- * Copyright (c) 1990, 1991, 1992, 1993, 1994, 1995, 1996
- * The Regents of the University of California. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that: (1) source code distributions
- * retain the above copyright notice and this paragraph in its entirety, (2)
- * distributions including binary code include the above copyright notice and
- * this paragraph in its entirety in the documentation or other materials
- * provided with the distribution, and (3) all advertising materials mentioning
- * features or use of this software display the following acknowledgement:
- * ``This product includes software developed by the University of California,
- * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
- * the University nor the names of its contributors may be used to endorse
- * or promote products derived from this software without specific prior
- * written permission.
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
- *
- * @(#) $Header: /usr/local/cvs/nessus-libraries/libpcap-nessus/gencode.h,v 1.3 2003/02/06 20:28:07 renaud Exp $ (LBL)
- */
- /*XXX*/
- #include "gnuc.h"
- /* Address qualifiers. */
- #define Q_HOST 1
- #define Q_NET 2
- #define Q_PORT 3
- #define Q_GATEWAY 4
- #define Q_PROTO 5
- /* Protocol qualifiers. */
- #define Q_LINK 1
- #define Q_IP 2
- #define Q_ARP 3
- #define Q_RARP 4
- #define Q_TCP 5
- #define Q_UDP 6
- #define Q_ICMP 7
- #define Q_IGMP 8
- #define Q_IGRP 9
- #define Q_ATALK 10
- #define Q_DECNET 11
- #define Q_LAT 12
- #define Q_SCA 13
- #define Q_MOPRC 14
- #define Q_MOPDL 15
- /* Directional qualifiers. */
- #define Q_SRC 1
- #define Q_DST 2
- #define Q_OR 3
- #define Q_AND 4
- #define Q_DEFAULT 0
- #define Q_UNDEF 255
- struct stmt {
- int code;
- bpf_int32 k;
- };
- struct slist {
- struct stmt s;
- struct slist *next;
- };
- /*
- * A bit vector to represent definition sets. We assume TOT_REGISTERS
- * is smaller than 8*sizeof(atomset).
- */
- typedef bpf_u_int32 atomset;
- #define ATOMMASK(n) (1 << (n))
- #define ATOMELEM(d, n) (d & ATOMMASK(n))
- /*
- * An unbounded set.
- */
- typedef bpf_u_int32 *uset;
- /*
- * Total number of atomic entities, including accumulator (A) and index (X).
- * We treat all these guys similarly during flow analysis.
- */
- #define N_ATOMS (BPF_MEMWORDS+2)
- struct edge {
- int id;
- int code;
- uset edom;
- struct block *succ;
- struct block *pred;
- struct edge *next; /* link list of incoming edges for a node */
- };
- struct block {
- int id;
- struct slist *stmts; /* side effect stmts */
- struct stmt s; /* branch stmt */
- int mark;
- int longjt; /* jt branch requires long jump */
- int longjf; /* jf branch requires long jump */
- int level;
- int offset;
- int sense;
- struct edge et;
- struct edge ef;
- struct block *head;
- struct block *link; /* link field used by optimizer */
- uset dom;
- uset closure;
- struct edge *in_edges;
- atomset def, kill;
- atomset in_use;
- atomset out_use;
- int oval;
- int val[N_ATOMS];
- };
- struct arth {
- struct block *b; /* protocol checks */
- struct slist *s; /* stmt list */
- int regno; /* virtual register number of result */
- };
- struct qual {
- unsigned char addr;
- unsigned char proto;
- unsigned char dir;
- unsigned char pad;
- };
- struct arth *gen_loadi(int);
- struct arth *gen_load(int, struct arth *, int);
- struct arth *gen_loadlen(void);
- struct arth *gen_neg(struct arth *);
- struct arth *gen_arth(int, struct arth *, struct arth *);
- void gen_and(struct block *, struct block *);
- void gen_or(struct block *, struct block *);
- void gen_not(struct block *);
- struct block *gen_scode(const char *, struct qual);
- struct block *gen_ecode(const u_char *, struct qual);
- struct block *gen_mcode(const char *, const char *, int, struct qual);
- struct block *gen_ncode(const char *, bpf_u_int32, struct qual);
- struct block *gen_proto_abbrev(int);
- struct block *gen_relation(int, struct arth *, struct arth *, int);
- struct block *gen_less(int);
- struct block *gen_greater(int);
- struct block *gen_byteop(int, int, int);
- struct block *gen_broadcast(int);
- struct block *gen_multicast(int);
- struct block *gen_inbound(int);
- void bpf_optimize(struct block **);
- #if __STDC__
- __dead void bpf_error(const char *, ...)
- __attribute__((volatile, format (printf, 1, 2)));
- #endif
- void finish_parse(struct block *);
- char *sdup(const char *);
- struct bpf_insn *icode_to_fcode(struct block *, int *);
- int pcap_parse(void);
- void lex_init(char *);
- void sappend(struct slist *, struct slist *);
- /* XXX */
- #define JT(b) ((b)->et.succ)
- #define JF(b) ((b)->ef.succ)