+++ /dev/null
-%{
-/* From NetBSD: grammar.y,v 1.2 1995/03/06 11:38:27 mycroft Exp */
-
-/*
- * Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994
- * 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.
- *
- */
-#ifndef lint
-static char rcsid[] =
- "@(#) Header: grammar.y,v 1.39 94/06/14 20:09:25 leres Exp (LBL)";
-#endif
-
-#include <stdio.h>
-#include <sys/types.h>
-#include <sys/time.h>
-#include <sys/socket.h>
-
-#include <net/ppp_defs.h>
-#include "bpf_compile.h"
-#include "gencode.h"
-
-#define QSET(q, p, d, a) (q).proto = (p),\
- (q).dir = (d),\
- (q).addr = (a)
-
-int n_errors = 0;
-
-static struct qual qerr = { Q_UNDEF, Q_UNDEF, Q_UNDEF, Q_UNDEF };
-
-static void
-yyerror(char *msg)
-{
- ++n_errors;
- bpf_error(msg);
- /* NOTREACHED */
-}
-
-#ifndef YYBISON
-int
-pcap_parse()
-{
- extern int yyparse();
- return (yyparse());
-}
-#endif
-
-%}
-
-%union {
- int i;
- unsigned long h;
- char *s;
- struct stmt *stmt;
- struct arth *a;
- struct {
- struct qual q;
- struct block *b;
- } blk;
- struct block *rblk;
-}
-
-%type <blk> expr id nid pid term rterm qid
-%type <blk> head
-%type <i> pqual dqual aqual
-%type <a> arth narth
-%type <i> byteop pname pnum relop irelop
-%type <blk> and or paren not null prog
-%type <rblk> other
-
-%token DST SRC HOST
-%token NET PORT LESS GREATER PROTO BYTE
-%token IP TCP UDP ICMP
-%token TK_BROADCAST TK_MULTICAST
-%token NUM INBOUND OUTBOUND
-%token LINK
-%token GEQ LEQ NEQ
-%token ID HID
-%token LSH RSH
-%token LEN
-
-%type <s> ID
-%type <h> HID
-%type <i> NUM
-
-%left OR AND
-%nonassoc '!'
-%left '|'
-%left '&'
-%left LSH RSH
-%left '+' '-'
-%left '*' '/'
-%nonassoc UMINUS
-%%
-prog: null expr
-{
- finish_parse($2.b);
-}
- | null
- ;
-null: /* null */ { $$.q = qerr; }
- ;
-expr: term
- | expr and term { gen_and($1.b, $3.b); $$ = $3; }
- | expr and id { gen_and($1.b, $3.b); $$ = $3; }
- | expr or term { gen_or($1.b, $3.b); $$ = $3; }
- | expr or id { gen_or($1.b, $3.b); $$ = $3; }
- ;
-and: AND { $$ = $<blk>0; }
- ;
-or: OR { $$ = $<blk>0; }
- ;
-id: nid
- | pnum { $$.b = gen_ncode((unsigned long)$1,
- $$.q = $<blk>0.q); }
- | paren pid ')' { $$ = $2; }
- ;
-nid: ID { $$.b = gen_scode($1, $$.q = $<blk>0.q); }
- | HID { $$.b = gen_ncode(__pcap_atoin((char *)$1),
- $$.q); }
- | not id { gen_not($2.b); $$ = $2; }
- ;
-not: '!' { $$ = $<blk>0; }
- ;
-paren: '(' { $$ = $<blk>0; }
- ;
-pid: nid
- | qid and id { gen_and($1.b, $3.b); $$ = $3; }
- | qid or id { gen_or($1.b, $3.b); $$ = $3; }
- ;
-qid: pnum { $$.b = gen_ncode((unsigned long)$1,
- $$.q = $<blk>0.q); }
- | pid
- ;
-term: rterm
- | not term { gen_not($2.b); $$ = $2; }
- ;
-head: pqual dqual aqual { QSET($$.q, $1, $2, $3); }
- | pqual dqual { QSET($$.q, $1, $2, Q_DEFAULT); }
- | pqual aqual { QSET($$.q, $1, Q_DEFAULT, $2); }
- | pqual PROTO { QSET($$.q, $1, Q_DEFAULT, Q_PROTO); }
- ;
-rterm: head id { $$ = $2; }
- | paren expr ')' { $$.b = $2.b; $$.q = $1.q; }
- | pname { $$.b = gen_proto_abbrev($1); $$.q = qerr; }
- | arth relop arth { $$.b = gen_relation($2, $1, $3, 0);
- $$.q = qerr; }
- | arth irelop arth { $$.b = gen_relation($2, $1, $3, 1);
- $$.q = qerr; }
- | other { $$.b = $1; $$.q = qerr; }
- ;
-/* protocol level qualifiers */
-pqual: pname
- | { $$ = Q_DEFAULT; }
- ;
-/* 'direction' qualifiers */
-dqual: SRC { $$ = Q_SRC; }
- | DST { $$ = Q_DST; }
- | SRC OR DST { $$ = Q_OR; }
- | DST OR SRC { $$ = Q_OR; }
- | SRC AND DST { $$ = Q_AND; }
- | DST AND SRC { $$ = Q_AND; }
- ;
-/* address type qualifiers */
-aqual: HOST { $$ = Q_HOST; }
- | NET { $$ = Q_NET; }
- | PORT { $$ = Q_PORT; }
- ;
-pname: LINK { $$ = Q_LINK; }
- | IP { $$ = Q_IP; }
- | TCP { $$ = Q_TCP; }
- | UDP { $$ = Q_UDP; }
- | ICMP { $$ = Q_ICMP; }
- ;
-other: pqual TK_BROADCAST { $$ = gen_broadcast($1); }
- | pqual TK_MULTICAST { $$ = gen_multicast($1); }
- | LESS NUM { $$ = gen_less($2); }
- | GREATER NUM { $$ = gen_greater($2); }
- | BYTE NUM byteop NUM { $$ = gen_byteop($3, $2, $4); }
- | INBOUND { $$ = gen_inbound(0); }
- | OUTBOUND { $$ = gen_inbound(1); }
- ;
-relop: '>' { $$ = BPF_JGT; }
- | GEQ { $$ = BPF_JGE; }
- | '=' { $$ = BPF_JEQ; }
- ;
-irelop: LEQ { $$ = BPF_JGT; }
- | '<' { $$ = BPF_JGE; }
- | NEQ { $$ = BPF_JEQ; }
- ;
-arth: pnum { $$ = gen_loadi($1); }
- | narth
- ;
-narth: pname '[' arth ']' { $$ = gen_load($1, $3, 1); }
- | pname '[' arth ':' NUM ']' { $$ = gen_load($1, $3, $5); }
- | arth '+' arth { $$ = gen_arth(BPF_ADD, $1, $3); }
- | arth '-' arth { $$ = gen_arth(BPF_SUB, $1, $3); }
- | arth '*' arth { $$ = gen_arth(BPF_MUL, $1, $3); }
- | arth '/' arth { $$ = gen_arth(BPF_DIV, $1, $3); }
- | arth '&' arth { $$ = gen_arth(BPF_AND, $1, $3); }
- | arth '|' arth { $$ = gen_arth(BPF_OR, $1, $3); }
- | arth LSH arth { $$ = gen_arth(BPF_LSH, $1, $3); }
- | arth RSH arth { $$ = gen_arth(BPF_RSH, $1, $3); }
- | '-' arth %prec UMINUS { $$ = gen_neg($2); }
- | paren narth ')' { $$ = $2; }
- | LEN { $$ = gen_loadlen(); }
- ;
-byteop: '&' { $$ = '&'; }
- | '|' { $$ = '|'; }
- | '<' { $$ = '<'; }
- | '>' { $$ = '>'; }
- | '=' { $$ = '='; }
- ;
-pnum: NUM
- | paren pnum ')' { $$ = $2; }
- ;
-%%
projects / ppp.git / blobdiff