174 lines
3.8 KiB
Plaintext
174 lines
3.8 KiB
Plaintext
%{
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/* $NetBSD: scanner.l,v 1.1 1996/03/15 03:09:15 paulus Exp $ */
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/*
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* Copyright (c) 1988, 1989, 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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#ifndef lint
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static char rcsid[] =
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"@(#) Header: scanner.l,v 1.40 94/06/10 17:21:44 mccanne Exp (LBL)";
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#endif
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#include <sys/types.h>
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#include <sys/time.h>
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#include <ctype.h>
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#include <net/ppp_defs.h>
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#include "pcap.h"
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#include "pcap-namedb.h"
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#include "gencode.h"
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#include "y.tab.h"
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#ifndef __GNUC__
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#define inline
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#endif
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static int stoi(char *);
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static inline int xdtoi(int);
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#ifndef FLEX_SCANNER
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static char *in_buffer;
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#undef getc
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#define getc(fp) (*in_buffer == 0 ? EOF : *in_buffer++)
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#endif
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extern YYSTYPE yylval;
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%}
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N ([0-9]+|(0X|0x)[0-9A-Fa-f]+)
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B ([0-9A-Fa-f][0-9A-Fa-f]?)
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%a 3000
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%%
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dst return DST;
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src return SRC;
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link|ppp return LINK;
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ip return IP;
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tcp return TCP;
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udp return UDP;
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icmp return ICMP;
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host return HOST;
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net return NET;
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port return PORT;
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proto return PROTO;
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less return LESS;
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greater return GREATER;
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byte return BYTE;
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broadcast return TK_BROADCAST;
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multicast return TK_MULTICAST;
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and|"&&" return AND;
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or|"||" return OR;
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not return '!';
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len|length return LEN;
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inbound return INBOUND;
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outbound return OUTBOUND;
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[ \n\t] ;
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[+\-*/:\[\]!<>()&|=] return yytext[0];
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">=" return GEQ;
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"<=" return LEQ;
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"!=" return NEQ;
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"==" return '=';
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"<<" return LSH;
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">>" return RSH;
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{N} { yylval.i = stoi((char *)yytext); return NUM; }
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({N}\.{N})|({N}\.{N}\.{N})|({N}\.{N}\.{N}\.{N}) {
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yylval.s = sdup((char *)yytext); return HID;
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}
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[A-Za-z][-_.A-Za-z0-9]* { yylval.s = sdup((char *)yytext); return ID; }
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"\\"[^ !()\n\t]+ { yylval.s = sdup((char *)yytext + 1); return ID; }
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[^ \[\]\t\n\-_.A-Za-z0-9!<>()&|=]+ { bpf_error("illegal token: %s\n", yytext); }
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. { bpf_error("illegal char '%c'", *yytext); }
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%%
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void
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lex_init(buf)
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char *buf;
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{
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#ifdef FLEX_SCANNER
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if (yy_current_buffer)
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yy_delete_buffer(yy_current_buffer);
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yy_switch_to_buffer(yy_scan_string(buf));
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#else
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in_buffer = buf;
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#endif
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}
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/*
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* Also define a yywrap. Note that if we're using flex, it will
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* define a macro to map this identifier to pcap_wrap.
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*/
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int
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yywrap()
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{
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return 1;
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}
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/* Hex digit to integer. */
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static inline int
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xdtoi(c)
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register int c;
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{
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if (isdigit(c))
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return c - '0';
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else if (islower(c))
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return c - 'a' + 10;
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else
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return c - 'A' + 10;
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}
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/*
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* Convert string to integer. Just like atoi(), but checks for
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* preceding 0x or 0 and uses hex or octal instead of decimal.
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*/
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static int
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stoi(s)
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char *s;
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{
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int base = 10;
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int n = 0;
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if (*s == '0') {
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if (s[1] == 'x' || s[1] == 'X') {
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s += 2;
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base = 16;
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}
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else {
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base = 8;
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s += 1;
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}
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}
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while (*s)
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n = n * base + xdtoi(*s++);
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return n;
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}
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