wireshark/text2pcap-scanner.l

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/* -*-mode: flex-*- */
%top {
/* Include this before everything else, for various large-file definitions */
#include "config.h"
#include <wireshark.h>
}
/*
* We don't use input, so don't generate code for it.
*/
%option noinput
/*
* We don't use unput, so don't generate code for it.
*/
%option nounput
/*
* We don't read interactively from the terminal.
*/
%option never-interactive
/*
* We want to stop processing when we get to the end of the input.
*/
%option noyywrap
/*
* Prefix scanner routines with "text2pcap_" rather than "yy" to avoid a
* "redefined macro" warning with flex 2.6.3.
*/
%option prefix="text2pcap_"
%{
/********************************************************************************
*
* text2pcap-scanner.l
*
* Utility to convert an ASCII hexdump into a libpcap-format capture file
*
* (c) Copyright 2001 Ashok Narayanan <ashokn@cisco.com>
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*
*******************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include "text2pcap.h"
#include <wireshark.h>
/*
* Disable diagnostics in the code generated by Flex.
*/
DIAG_OFF_FLEX
/*
* Flex (v 2.5.35) uses this symbol to "exclude" unistd.h
*/
#ifdef _WIN32
#define YY_NO_UNISTD_H
#endif
%}
directive ^#TEXT2PCAP.*\r?\n
comment ^[\t ]*#.*\r?\n
byte [0-9A-Fa-f][0-9A-Fa-f][ \t]?
byte_eol [0-9A-Fa-f][0-9A-Fa-f]\r?\n
offset [0-9A-Fa-f]+[: \t]
offset_eol [0-9A-Fa-f]+\r?\n
text [^ \n\t]+
mailfwd >
eol \r?\n\r?
%%
{byte} { if (parse_token(T_BYTE, yytext) != EXIT_SUCCESS) return EXIT_FAILURE; }
{byte_eol} { if (parse_token(T_BYTE, yytext) != EXIT_SUCCESS) return EXIT_FAILURE;
if (parse_token(T_EOL, NULL) != EXIT_SUCCESS) return EXIT_FAILURE; }
{offset} { if (parse_token(T_OFFSET, yytext) != EXIT_SUCCESS) return EXIT_FAILURE; }
{offset_eol} { if (parse_token(T_OFFSET, yytext) != EXIT_SUCCESS) return EXIT_FAILURE;
if (parse_token(T_EOL, NULL) != EXIT_SUCCESS) return EXIT_FAILURE; }
{mailfwd}{offset} { if (parse_token(T_OFFSET, yytext+1) != EXIT_SUCCESS) return EXIT_FAILURE; }
{eol} { if (parse_token(T_EOL, NULL) != EXIT_SUCCESS) return EXIT_FAILURE; }
[ \t] ; /* ignore whitespace */
{directive} { if (parse_token(T_DIRECTIVE, yytext) != EXIT_SUCCESS) return EXIT_FAILURE;
if (parse_token(T_EOL, NULL) != EXIT_SUCCESS) return EXIT_FAILURE; }
{comment} { if (parse_token(T_EOL, NULL) != EXIT_SUCCESS) return EXIT_FAILURE; }
{text} { if (parse_token(T_TEXT, yytext) != EXIT_SUCCESS) return EXIT_FAILURE; }
%%
/*
* Turn diagnostics back on, so we check the code that we've written.
*/
DIAG_ON_FLEX
int
text2pcap_scan(void)
{
int ret;
ret = text2pcap_lex();
text2pcap_lex_destroy();
return ret;
}