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psd: import 20090807 code base

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Mohd Nawawi Mohamad Jamili
2009-08-07 16:18:49 +08:00
committed by Jan Engelhardt
parent 5aee8738ed
commit 2aa32d4bce
9 changed files with 575 additions and 0 deletions
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extensions/libxt_psd.c Normal file
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/*
Shared library add-on to iptables to add PSD support
Copyright (C) 2000,2001 astaro AG
This file is distributed under the terms of the GNU General Public
License (GPL). Copies of the GPL can be obtained from:
ftp://prep.ai.mit.edu/pub/gnu/GPL
2000-05-04 Markus Hennig <hennig@astaro.de> : initial
2000-08-18 Dennis Koslowski <koslowski@astaro.de> : first release
2000-12-01 Dennis Koslowski <koslowski@astaro.de> : UDP scans detection added
2001-02-04 Jan Rekorajski <baggins@pld.org.pl> : converted from target to match
2003-03-02 Harald Welte <laforge@netfilter.org>: fix 'storage' bug
2008-04-03 Mohd Nawawi <nawawi@tracenetworkcorporation.com>: update to 2.6.24 / 1.4 code
2008-06-24 Mohd Nawawi <nawawi@tracenetworkcorporation.com>: update to 2.6.24 / 1.4.1 code
2009-08-07 Mohd Nawawi Mohamad Jamili <nawawi@tracenetworkcorporation.com> : ported to xtables-addons
*/
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <netdb.h>
#include <string.h>
#include <stdlib.h>
#include <syslog.h>
#include <getopt.h>
#include <xtables.h>
#include <linux/netfilter/x_tables.h>
#include "xt_psd.h"
/* Function which prints out usage message. */
static void psd_mt_help(void) {
printf(
"psd match options:\n"
" --psd-weight-threshold threshhold Portscan detection weight threshold\n"
" --psd-delay-threshold delay Portscan detection delay threshold\n"
" --psd-lo-ports-weight lo Privileged ports weight\n"
" --psd-hi-ports-weight hi High ports weight\n\n");
}
static const struct option psd_mt_opts[] = {
{.name = "psd-weight-threshold", .has_arg = true, .val = '1'},
{.name = "psd-delay-threshold", .has_arg = true, .val = '2'},
{.name = "psd-lo-ports-weight", .has_arg = true, .val = '3'},
{.name = "psd-hi-ports-weight", .has_arg = true, .val = '4'},
{NULL}
};
/* Initialize the target. */
static void psd_mt_init(struct xt_entry_match *match) {
struct xt_psd_info *psdinfo = (struct xt_psd_info *)match->data;
psdinfo->weight_threshold = SCAN_WEIGHT_THRESHOLD;
psdinfo->delay_threshold = SCAN_DELAY_THRESHOLD;
psdinfo->lo_ports_weight = PORT_WEIGHT_PRIV;
psdinfo->hi_ports_weight = PORT_WEIGHT_HIGH;
}
#define XT_PSD_OPT_CTRESH 0x01
#define XT_PSD_OPT_DTRESH 0x02
#define XT_PSD_OPT_LPWEIGHT 0x04
#define XT_PSD_OPT_HPWEIGHT 0x08
static int psd_mt_parse(int c, char **argv, int invert, unsigned int *flags,
const void *entry, struct xt_entry_match **match)
{
struct xt_psd_info *psdinfo = (struct xt_psd_info *)(*match)->data;
unsigned int num;
switch (c) {
/* PSD-weight-threshold */
case '1':
if(*flags & XT_PSD_OPT_CTRESH) {
xtables_error(PARAMETER_PROBLEM,"Can't specify --psd-weight-threshold twice");
}
if(!xtables_strtoui(optarg, NULL,&num,0,PSD_MAX_RATE)) {
xtables_error(PARAMETER_PROBLEM, "bad --psd-weight-threshold '%s'", optarg);
}
psdinfo->weight_threshold = num;
*flags |= XT_PSD_OPT_CTRESH;
return true;
/* PSD-delay-threshold */
case '2':
if(*flags & XT_PSD_OPT_DTRESH) {
xtables_error(PARAMETER_PROBLEM, "Can't specify --psd-delay-threshold twice");
}
if(!xtables_strtoui(optarg, NULL,&num,0,PSD_MAX_RATE)) {
xtables_error(PARAMETER_PROBLEM,"bad --psd-delay-threshold '%s'", optarg);
}
psdinfo->delay_threshold = num;
*flags |= XT_PSD_OPT_DTRESH;
return true;
/* PSD-lo-ports-weight */
case '3':
if(*flags & XT_PSD_OPT_LPWEIGHT) {
xtables_error(PARAMETER_PROBLEM, "Can't specify --psd-lo-ports-weight twice");
}
if(!xtables_strtoui(optarg, NULL,&num,0,PSD_MAX_RATE)) {
xtables_error(PARAMETER_PROBLEM,"bad --psd-lo-ports-weight '%s'", optarg);
}
psdinfo->lo_ports_weight = num;
*flags |= XT_PSD_OPT_LPWEIGHT;
return true;
/* PSD-hi-ports-weight */
case '4':
if(*flags & XT_PSD_OPT_HPWEIGHT) {
xtables_error(PARAMETER_PROBLEM, "Can't specify --psd-hi-ports-weight twice");
}
if(!xtables_strtoui(optarg, NULL, &num, 0, PSD_MAX_RATE)) {
xtables_error(PARAMETER_PROBLEM, "bad --psd-hi-ports-weight '%s'", optarg);
}
psdinfo->hi_ports_weight = num;
*flags |= XT_PSD_OPT_HPWEIGHT;
return true;
}
return false;
}
/* Final check; nothing. */
static void psd_mt_final_check(unsigned int flags) {}
/* Prints out the targinfo. */
static void psd_mt_print(const void *ip, const struct xt_entry_match *match, int numeric)
{
const struct xt_psd_info *psdinfo = (const struct xt_psd_info *)match->data;
printf("psd ");
printf("weight-threshold: %u ", psdinfo->weight_threshold);
printf("delay-threshold: %u ", psdinfo->delay_threshold);
printf("lo-ports-weight: %u ", psdinfo->lo_ports_weight);
printf("hi-ports-weight: %u ", psdinfo->hi_ports_weight);
}
/* Saves the union ipt_targinfo in parsable form to stdout. */
static void psd_mt_save(const void *ip, const struct xt_entry_match *match)
{
const struct xt_psd_info *psdinfo = (const struct xt_psd_info *)match->data;
printf("--psd-weight-threshold %u ", psdinfo->weight_threshold);
printf("--psd-delay-threshold %u ", psdinfo->delay_threshold);
printf("--psd-lo-ports-weight %u ", psdinfo->lo_ports_weight);
printf("--psd-hi-ports-weight %u ", psdinfo->hi_ports_weight);
}
static struct xtables_match psd_mt_reg = {
.name = "psd",
.version = XTABLES_VERSION,
.revision = 1,
.family = PF_INET,
.size = XT_ALIGN(sizeof(struct xt_psd_info)),
.userspacesize = XT_ALIGN(sizeof(struct xt_psd_info)),
.help = psd_mt_help,
.init = psd_mt_init,
.parse = psd_mt_parse,
.final_check = psd_mt_final_check,
.print = psd_mt_print,
.save = psd_mt_save,
.extra_opts = psd_mt_opts,
};
static __attribute__((constructor)) void psd_mt_ldr(void)
{
xtables_register_match(&psd_mt_reg);
}