scanner.l
上传用户:tjescc
上传日期:2021-02-23
资源大小:419k
文件大小:4k
- %{
- /*
- * Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997
- * 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 const char rcsid[] =
- "@(#) $Header: /usr/local/cvs/nessus-libraries/libpcap-nessus/scanner.l,v 1.3 2003/02/06 20:28:09 renaud Exp $ (LBL)";
- #endif
- #include <sys/types.h>
- #include <sys/time.h>
- #include <ctype.h>
- #include <unistd.h>
- #include "pcap-int.h"
- #include "gencode.h"
- #include "pcap-namedb.h"
- #include "tokdefs.h"
- #include "gnuc.h"
- #ifdef HAVE_OS_PROTO_H
- #include "os-proto.h"
- #endif
- static int stoi(char *);
- static inline int xdtoi(int);
- #ifdef FLEX_SCANNER
- #define YY_NO_UNPUT
- #undef YY_INPUT
- #define YY_INPUT(buf, result, max)
- {
- char *src = in_buffer;
- int i;
- if (*src == 0)
- result = YY_NULL;
- else {
- for (i = 0; *src && i < max; ++i)
- buf[i] = *src++;
- in_buffer += i;
- result = i;
- }
- }
- #else
- #undef getc
- #define getc(fp) (*in_buffer == 0 ? EOF : *in_buffer++)
- #endif
- #define yylval pcap_lval
- extern YYSTYPE yylval;
- static char *in_buffer;
- %}
- N ([0-9]+|(0X|0x)[0-9A-Fa-f]+)
- B ([0-9A-Fa-f][0-9A-Fa-f]?)
- %a 3000
- %%
- dst return DST;
- src return SRC;
- link|ether|ppp|slip return LINK;
- fddi return LINK;
- arp return ARP;
- rarp return RARP;
- ip return IP;
- tcp return TCP;
- udp return UDP;
- icmp return ICMP;
- igmp return IGMP;
- igrp return IGRP;
- atalk return ATALK;
- decnet return DECNET;
- lat return LAT;
- sca return SCA;
- moprc return MOPRC;
- mopdl return MOPDL;
- host return HOST;
- net return NET;
- mask return MASK;
- port return PORT;
- proto return PROTO;
- gateway return GATEWAY;
- less return LESS;
- greater return GREATER;
- byte return BYTE;
- broadcast return TK_BROADCAST;
- multicast return TK_MULTICAST;
- and|"&&" return AND;
- or|"||" return OR;
- not return '!';
- len|length return LEN;
- inbound return INBOUND;
- outbound return OUTBOUND;
- [ nt] ;
- [+-*/:[]!<>()&|=] return yytext[0];
- ">=" return GEQ;
- "<=" return LEQ;
- "!=" return NEQ;
- "==" return '=';
- "<<" return LSH;
- ">>" return RSH;
- {N} { yylval.i = stoi((char *)yytext); return NUM; }
- ({N}.{N})|({N}.{N}.{N})|({N}.{N}.{N}.{N}) {
- yylval.s = sdup((char *)yytext); return HID; }
- {B}:{B}:{B}:{B}:{B}:{B} { yylval.e = pcap_ether_aton((char *)yytext);
- return EID; }
- {B}:+({B}:+)+ { bpf_error("bogus ethernet address %s", yytext); }
- [A-Za-z0-9][-_.A-Za-z0-9]*[.A-Za-z0-9] {
- yylval.s = sdup((char *)yytext); return ID; }
- "\"[^ !()nt]+ { yylval.s = sdup((char *)yytext + 1); return ID; }
- [^ []tn-_.A-Za-z0-9!<>()&|=]+i {
- bpf_error("illegal token: %sn", yytext); }
- . { bpf_error("illegal char '%c'", *yytext); }
- %%
- void
- lex_init(buf)
- char *buf;
- {
- in_buffer = buf;
- }
- /*
- * Also define a yywrap. Note that if we're using flex, it will
- * define a macro to map this identifier to pcap_wrap.
- */
- int
- yywrap()
- {
- return 1;
- }
- /* Hex digit to integer. */
- static inline int
- xdtoi(c)
- register int c;
- {
- if (isdigit(c))
- return c - '0';
- else if (islower(c))
- return c - 'a' + 10;
- else
- return c - 'A' + 10;
- }
- /*
- * Convert string to integer. Just like atoi(), but checks for
- * preceding 0x or 0 and uses hex or octal instead of decimal.
- */
- static int
- stoi(s)
- char *s;
- {
- int base = 10;
- int n = 0;
- if (*s == '0') {
- if (s[1] == 'x' || s[1] == 'X') {
- s += 2;
- base = 16;
- }
- else {
- base = 8;
- s += 1;
- }
- }
- while (*s)
- n = n * base + xdtoi(*s++);
- return n;
- }