210 lines
4.4 KiB
Plaintext
210 lines
4.4 KiB
Plaintext
%{
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/*
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* Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997
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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 const char rcsid[] =
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"@(#) $Header: scanner.l,v 1.56 97/07/21 13:31:50 leres 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 <unistd.h>
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#include "pcap-int.h"
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#include "gencode.h"
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#include <pcap-namedb.h>
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#include "tokdefs.h"
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#include "gnuc.h"
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#ifdef HAVE_OS_PROTO_H
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#include "os-proto.h"
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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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#ifdef FLEX_SCANNER
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#define YY_NO_UNPUT
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#undef YY_INPUT
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#define YY_INPUT(buf, result, max)\
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{\
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char *src = in_buffer;\
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int i;\
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\
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if (*src == 0)\
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result = YY_NULL;\
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else {\
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for (i = 0; *src && i < max; ++i)\
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buf[i] = *src++;\
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in_buffer += i;\
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result = i;\
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}\
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}
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#else
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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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#define yylval pcap_lval
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extern YYSTYPE yylval;
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static char *in_buffer;
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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|ether|ppp|slip return LINK;
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fddi return LINK;
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arp return ARP;
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rarp return RARP;
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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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igmp return IGMP;
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igrp return IGRP;
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atalk return ATALK;
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decnet return DECNET;
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lat return LAT;
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sca return SCA;
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moprc return MOPRC;
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mopdl return MOPDL;
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iso return ISO;
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esis return ESIS;
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es-is return ESIS;
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isis return ISIS;
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is-is return ISIS;
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host return HOST;
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net return NET;
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mask return MASK;
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port return PORT;
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proto return PROTO;
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gateway return GATEWAY;
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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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{B}:{B}:{B}:{B}:{B}:{B} { yylval.e = pcap_ether_aton((char *)yytext);
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return EID; }
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{B}:+({B}:+)+ { bpf_error("bogus ethernet address %s", yytext); }
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[A-Za-z0-9][-_.A-Za-z0-9]*[.A-Za-z0-9] {
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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!<>()&|=]+i {
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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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in_buffer = buf;
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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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