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/* -*-c-*- */
/*
* WallFire -- a comprehensive firewall administration tool.
*
* Copyright (C) 2001 Herv Eychenne <rv@wallfire.org>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
*/
%option prefix="ipchains"
%option outfile="ipchains.cc"
%option noyywrap
%{
using namespace std;
#define YY_NO_UNPUT
#define IPLEN 16
#include <unistd.h>
#include <string.h>
#include <ctype.h>
#include "ipchains.h"
#include "common.h"
#include "defs.h"
static void ipchains_parse_data(char *input);
static void ipchains_parse_rdata(char *input);
static void ipchains_parse_ips(char *input);
static wf_logentry* logentry;
%}
MONTH "Jan"|"Feb"|"Mar"|"Apr"|"May"|"Jun"|"Jul"|"Aug"|"Sep"|"Oct"|"Nov"|"Dec"
STRING [a-zA-Z-][a-zA-Z0-9._-]*
LOGHOST [0-9.a-zA-Z_-]*
DIGIT [0-9]
NUMBER {DIGIT}+
BYTE {DIGIT}{1,3}
IPADDR {BYTE}\.{BYTE}\.{BYTE}\.{BYTE}
PORT {DIGIT}{1,5}
HEXDIGIT [0-9a-fA-F]
HEXNUM "0x"{HEXDIGIT}+
IPCHAINS " kernel: Packet log: "
%%
{MONTH}[ ]{1,2}{DIGIT}{1,2}[ ]{DIGIT}{2}:{DIGIT}{2}:{DIGIT}{2}[ ]{LOGHOST} parse_date(ipchainstext, logentry);
{IPCHAINS} /* ignore */
{STRING}[ ]{STRING}[ ]{STRING}" PROTO="{NUMBER} ipchains_parse_data(ipchainstext);
{STRING}" REDIRECT "{NUMBER}" "{STRING}" PROTO="{NUMBER} ipchains_parse_rdata(ipchainstext);
{IPADDR}":"{PORT}" "{IPADDR}":"{PORT} ipchains_parse_ips(ipchainstext);
"L="{NUMBER} logentry->datalen = atoi(ipchainstext+2);
"S="{HEXNUM} /* ignore */
"I="{NUMBER} /* ignore */
"F="{HEXNUM} /* ignore */
"T="{NUMBER} /* ignore */
"O="{HEXNUM} /* ignore */
"SYN" logentry->tcpflags = TCP_SYN;
"(#"{NUMBER}")" /* ignore */
[ ]+ /* ignore whitespace */
[\n] /* ignore */
{STRING} if (verbose) fprintf(stderr, _("Unrecognized token: %s\n"), ipchainstext);
. if (verbose) fprintf(stderr, _("Unrecognized character: %s\n"), ipchainstext);
%%
static void
ipchains_parse_data(char *input) {
char chainlabel[32], branchname[32], iface[32];
int protocol;
if (sscanf(input, "%30s %30s %30s PROTO=%3d",
chainlabel, branchname, iface, &protocol) != 4)
return;
logentry->chainlabel = chainlabel;
logentry->branchname = branchname;
if (!strcmp(chainlabel, "output") || !strcmp(chainlabel, "forward"))
logentry->output_iface = iface;
else /* "input" and default */
logentry->input_iface = iface;
logentry->protocol = protocol;
}
static void
ipchains_parse_rdata(char* input) {
char chainlabel[32], branchname[32], iface[32];
int port, protocol;
if (sscanf(input, "%30s REDIRECT %5d %30s PROTO=%3d",
chainlabel, &port, iface, &protocol) != 4)
return;
snprintf(branchname, sizeof(branchname), "RD %d", port);
logentry->chainlabel = chainlabel;
logentry->branchname = branchname;
if (!strcmp(chainlabel, "output") || !strcmp(chainlabel, "forward"))
logentry->output_iface = iface;
else /* "input" and default */
logentry->input_iface = iface;
logentry->protocol = protocol;
}
static void
ipchains_parse_ips(char *input) {
int shost1, shost2, shost3, shost4, sport;
int dhost1, dhost2, dhost3, dhost4, dport;
char ip[IPLEN];
if (sscanf(input, "%3d.%3d.%3d.%3d:%5d %3d.%3d.%3d.%3d:%5d",
&shost1, &shost2, &shost3, &shost4, &sport,
&dhost1, &dhost2, &dhost3, &dhost4, &dport) != 10)
return;
snprintf(ip, IPLEN, "%d.%d.%d.%d", shost1, shost2, shost3, shost4);
if (logentry->sipaddr.set(ip) == false)
return;
snprintf(ip, IPLEN, "%d.%d.%d.%d", dhost1, dhost2, dhost3, dhost4);
if (logentry->dipaddr.set(ip) == false)
return;
logentry->sport = sport;
logentry->dport = dport;
}
wf_inmodule_ipchains::wf_inmodule_ipchains() {
}
bool
wf_inmodule_ipchains::match(const string& line) const {
return (line.find(" kernel: Packet log: ") != string::npos);
}
enum wf_logentry_parsing_result
wf_inmodule_ipchains::parse(wf_logentry** retlogentry,
const string& line, int linenum) {
logentry = new wf_logentry();
if (logentry == NULL)
return WF_LOGENTRY_PARSING_ERROR;
ipchains_scan_string(line.c_str());
ipchainslex();
logentry->count = 1;
logentry->format = "ipchains";
/*
if (parser == (IPCHAINS_DATE|IPCHAINS_DATA|IPCHAINS_IPS))
*/
*retlogentry = logentry;
return WF_LOGENTRY_PARSING_OK;
if (verbose)
fprintf(stderr, _("ipchains parse error in line %d, ignoring.\n"),
linenum);
return WF_LOGENTRY_PARSING_ERROR;
}
extern "C" wf_inmodule*
wf_inmodule_ipchains_init() {
return new wf_inmodule_ipchains();
}
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