package/iptables/patches/008-chaostables.patch

   1 Index: iptables-1.3.8/extensions/.CHAOS-test
   2 ===================================================================
   3 --- /dev/null   1970-01-01 00:00:00.000000000 +0000
   4 +++ iptables-1.3.8/extensions/.CHAOS-test       2007-07-31 15:27:57.000000000 -0500
   5 @@ -0,0 +1,2 @@
   6 +#!/bin/sh
   7 +[ -f "$KERNEL_DIR/include/linux/netfilter/xt_CHAOS.h" ] && echo "CHAOS";
   8 Index: iptables-1.3.8/extensions/.DELUDE-test
   9 ===================================================================
  10 --- /dev/null   1970-01-01 00:00:00.000000000 +0000
  11 +++ iptables-1.3.8/extensions/.DELUDE-test      2007-07-31 15:27:57.000000000 -0500
  12 @@ -0,0 +1,2 @@
  13 +#!/bin/sh
  14 +echo "DELUDE";
  15 Index: iptables-1.3.8/extensions/libipt_CHAOS.c
  16 ===================================================================
  17 --- /dev/null   1970-01-01 00:00:00.000000000 +0000
  18 +++ iptables-1.3.8/extensions/libipt_CHAOS.c    2007-07-31 15:27:57.000000000 -0500
  19 @@ -0,0 +1,111 @@
  20 +/*
  21 +    CHAOS target for iptables
  22 +
  23 +    Copyright © Jan Engelhardt <jengelh [at] gmx de>, 2006 - 2007
  24 +    released under the terms of the GNU General Public
  25 +    License version 2.x and only versions 2.x.
  26 +*/
  27 +#include <getopt.h>
  28 +#include <stdio.h>
  29 +#include <string.h>
  30 +
  31 +#include <iptables.h>
  32 +#include <linux/netfilter_ipv4/ip_tables.h>
  33 +#include <linux/netfilter/xt_CHAOS.h>
  34 +
  35 +static void libipt_chaos_help(void)
  36 +{
  37 +       printf(
  38 +               "CHAOS target v%s options:\n"
  39 +               "  --delude     Enable DELUDE processing for TCP\n"
  40 +               "  --tarpit     Enable TARPIT processing for TCP\n",
  41 +               IPTABLES_VERSION);
  42 +       return;
  43 +}
  44 +
  45 +static int libipt_chaos_parse(int c, char **argv, int invert,
  46 +    unsigned int *flags, const struct ipt_entry *entry,
  47 +    struct ipt_entry_target **target)
  48 +{
  49 +       struct xt_chaos_info *info = (void *)((*target)->data);
  50 +       switch(c) {
  51 +               case 'd':
  52 +                       info->variant = XTCHAOS_DELUDE;
  53 +                       *flags |= 0x02;
  54 +                       return 1;
  55 +               case 't':
  56 +                       info->variant = XTCHAOS_TARPIT;
  57 +                       *flags |= 0x01;
  58 +                       return 1;
  59 +       }
  60 +       return 0;
  61 +}
  62 +
  63 +static void libipt_chaos_check(unsigned int flags)
  64 +{
  65 +       if(flags != 0x03)
  66 +               return;
  67 +       /* If flags == 0x03, both were specified, which should not be. */
  68 +       exit_error(PARAMETER_PROBLEM,
  69 +                  "CHAOS: only one of --tarpit or --delude may be specified");
  70 +       return;
  71 +}
  72 +
  73 +static void libipt_chaos_print(const struct ipt_ip *ip,
  74 +    const struct ipt_entry_target *target, int numeric)
  75 +{
  76 +       const struct xt_chaos_info *info = (const void *)target->data;
  77 +       switch(info->variant) {
  78 +               case XTCHAOS_DELUDE:
  79 +                       printf("DELUDE ");
  80 +                       break;
  81 +               case XTCHAOS_TARPIT:
  82 +                       printf("TARPIT ");
  83 +                       break;
  84 +               default:
  85 +                       break;
  86 +       }
  87 +       return;
  88 +}
  89 +
  90 +static void libipt_chaos_save(const struct ipt_ip *ip,
  91 +    const struct ipt_entry_target *target)
  92 +{
  93 +       const struct xt_chaos_info *info = (const void *)target->data;
  94 +       switch(info->variant) {
  95 +               case XTCHAOS_DELUDE:
  96 +                       printf("--delude ");
  97 +                       break;
  98 +               case XTCHAOS_TARPIT:
  99 +                       printf("--tarpit ");
 100 +                       break;
 101 +               default:
 102 +                       break;
 103 +       }
 104 +       return;
 105 +}
 106 +
 107 +static struct option libipt_chaos_opts[] = {
 108 +       {"delude", 0, NULL, 'd'},
 109 +       {"tarpit", 0, NULL, 't'},
 110 +       {NULL},
 111 +};
 112 +
 113 +static struct iptables_target libipt_chaos_info = {
 114 +       .name          = "CHAOS",
 115 +       .version       = IPTABLES_VERSION,
 116 +       .size          = IPT_ALIGN(sizeof(struct xt_chaos_info)),
 117 +       .userspacesize = IPT_ALIGN(sizeof(struct xt_chaos_info)),
 118 +       .help          = libipt_chaos_help,
 119 +       .parse         = libipt_chaos_parse,
 120 +       .final_check   = libipt_chaos_check,
 121 +       .print         = libipt_chaos_print,
 122 +       .save          = libipt_chaos_save,
 123 +       .extra_opts    = libipt_chaos_opts,
 124 +};
 125 +
 126 +static __attribute__((constructor)) void libipt_chaos_init(void)
 127 +{
 128 +       register_target(&libipt_chaos_info);
 129 +       return;
 130 +}
 131 Index: iptables-1.3.8/extensions/libipt_DELUDE.c
 132 ===================================================================
 133 --- /dev/null   1970-01-01 00:00:00.000000000 +0000
 134 +++ iptables-1.3.8/extensions/libipt_DELUDE.c   2007-07-31 15:27:57.000000000 -0500
 135 @@ -0,0 +1,66 @@
 136 +/*
 137 +    DELUDE target for iptables
 138 +
 139 +    Copyright © Jan Engelhardt <jengelh [at] gmx de>, 2006 - 2007
 140 +    released under the terms of the GNU General Public
 141 +    License version 2.x and only versions 2.x.
 142 +*/
 143 +#include <getopt.h>
 144 +#include <stdio.h>
 145 +#include <string.h>
 146 +
 147 +#include <iptables.h>
 148 +#include <linux/netfilter_ipv4/ip_tables.h>
 149 +
 150 +static void libipt_delude_help(void)
 151 +{
 152 +       printf("DELUDE takes no options\n");
 153 +       return;
 154 +}
 155 +
 156 +static int libipt_delude_parse(int c, char **argv, int invert,
 157 +    unsigned int *flags, const struct ipt_entry *entry,
 158 +    struct ipt_entry_target **target)
 159 +{
 160 +       return 0;
 161 +}
 162 +
 163 +static void libipt_delude_check(unsigned int flags)
 164 +{
 165 +       return;
 166 +}
 167 +
 168 +static void libipt_delude_print(const struct ipt_ip *ip,
 169 +    const struct ipt_entry_target *target, int numeric)
 170 +{
 171 +       return;
 172 +}
 173 +
 174 +static void libipt_delude_save(const struct ipt_ip *ip,
 175 +    const struct ipt_entry_target *target)
 176 +{
 177 +       return;
 178 +}
 179 +
 180 +static struct option libipt_delude_opts[] = {
 181 +       {NULL},
 182 +};
 183 +
 184 +static struct iptables_target libipt_delude_info = {
 185 +       .name          = "DELUDE",
 186 +       .version       = IPTABLES_VERSION,
 187 +       .size          = IPT_ALIGN(0),
 188 +       .userspacesize = IPT_ALIGN(0),
 189 +       .help          = libipt_delude_help,
 190 +       .parse         = libipt_delude_parse,
 191 +       .final_check   = libipt_delude_check,
 192 +       .print         = libipt_delude_print,
 193 +       .save          = libipt_delude_save,
 194 +       .extra_opts    = libipt_delude_opts,
 195 +};
 196 +
 197 +static __attribute__((constructor)) void libipt_delude_init(void)
 198 +{
 199 +       register_target(&libipt_delude_info);
 200 +       return;
 201 +}
 202 Index: iptables-1.3.8/extensions/libipt_portscan.c
 203 ===================================================================
 204 --- /dev/null   1970-01-01 00:00:00.000000000 +0000
 205 +++ iptables-1.3.8/extensions/libipt_portscan.c 2007-07-31 15:27:57.000000000 -0500
 206 @@ -0,0 +1,129 @@
 207 +/*
 208 +    portscan match for iptables
 209 +
 210 +    Copyright © Jan Engelhardt <jengelh [at] gmx de>, 2006 - 2007
 211 +    released under the terms of the GNU General Public
 212 +    License version 2.x and only versions 2.x.
 213 +*/
 214 +#include <stdio.h>
 215 +#include <string.h>
 216 +#include <stdlib.h>
 217 +#include <getopt.h>
 218 +
 219 +#include <iptables.h>
 220 +#include <linux/netfilter_ipv4/ip_tables.h>
 221 +#include <linux/netfilter/xt_portscan.h>
 222 +
 223 +static void libipt_portscan_help(void)
 224 +{
 225 +       printf(
 226 +               "portscan match v%s options:\n"
 227 +               "(Combining them will make them match by OR-logic)\n"
 228 +               "  --stealth    Match TCP Stealth packets\n"
 229 +               "  --synscan    Match TCP SYN scans\n"
 230 +               "  --cnscan     Match TCP Connect scans\n"
 231 +               "  --grscan     Match Banner Grabbing scans\n",
 232 +               IPTABLES_VERSION);
 233 +       return;
 234 +}
 235 +
 236 +static void libipt_portscan_mtinit(struct ipt_entry_match *match,
 237 +    unsigned int *nfcache)
 238 +{
 239 +       /* Cannot cache this */
 240 +       *nfcache |= NFC_UNKNOWN;
 241 +       return;
 242 +}
 243 +
 244 +static int libipt_portscan_parse(int c, char **argv, int invert,
 245 +    unsigned int *flags, const struct ipt_entry *entry, unsigned int *nfc,
 246 +    struct ipt_entry_match **match)
 247 +{
 248 +       struct xt_portscan_info *info = (void *)((*match)->data);
 249 +
 250 +       switch(c) {
 251 +               case 'c':
 252 +                       info->match_cn = 1;
 253 +                       return 1;
 254 +               case 'g':
 255 +                       info->match_gr = 1;
 256 +                       return 1;
 257 +               case 's':
 258 +                       info->match_syn = 1;
 259 +                       return 1;
 260 +               case 'x':
 261 +                       info->match_stealth = 1;
 262 +                       return 1;
 263 +               default:
 264 +                       return 0;
 265 +       }
 266 +}
 267 +
 268 +static void libipt_portscan_check(unsigned int flags)
 269 +{
 270 +       return;
 271 +}
 272 +
 273 +static void libipt_portscan_print(const struct ipt_ip *ip,
 274 +    const struct ipt_entry_match *match, int numeric)
 275 +{
 276 +       const struct xt_portscan_info *info = (const void *)(match->data);
 277 +       const char *s = "";
 278 +
 279 +       printf("portscan ");
 280 +       if(info->match_stealth) {
 281 +               printf("STEALTH");
 282 +               s = ",";
 283 +       }
 284 +       if(info->match_syn) {
 285 +               printf("%sSYNSCAN", s);
 286 +               s = ",";
 287 +       }
 288 +       if(info->match_cn) {
 289 +               printf("%sCNSCAN", s);
 290 +               s = ",";
 291 +       }
 292 +       if(info->match_gr)
 293 +               printf("%sGRSCAN", s);
 294 +       printf(" ");
 295 +       return;
 296 +}
 297 +
 298 +static void libipt_portscan_save(const struct ipt_ip *ip,
 299 +    const struct ipt_entry_match *match)
 300 +{
 301 +       const struct xt_portscan_info *info = (const void *)(match->data);
 302 +       if(info->match_stealth) printf("--stealth ");
 303 +       if(info->match_syn)     printf("--synscan ");
 304 +       if(info->match_cn)      printf("--cnscan ");
 305 +       if(info->match_gr)      printf("--grscan ");
 306 +       return;
 307 +}
 308 +
 309 +static struct option libipt_portscan_opts[] = {
 310 +       {"stealth", 0, NULL, 'x'},
 311 +       {"synscan", 0, NULL, 's'},
 312 +       {"cnscan",  0, NULL, 'c'},
 313 +       {"grscan",  0, NULL, 'g'},
 314 +       {NULL},
 315 +};
 316 +
 317 +static struct iptables_match libipt_portscan_info = {
 318 +       .name          = "portscan",
 319 +       .version       = IPTABLES_VERSION,
 320 +       .size          = IPT_ALIGN(sizeof(struct xt_portscan_info)),
 321 +       .userspacesize = IPT_ALIGN(sizeof(struct xt_portscan_info)),
 322 +       .help          = libipt_portscan_help,
 323 +       .init          = libipt_portscan_mtinit,
 324 +       .parse         = libipt_portscan_parse,
 325 +       .final_check   = libipt_portscan_check,
 326 +       .print         = libipt_portscan_print,
 327 +       .save          = libipt_portscan_save,
 328 +       .extra_opts    = libipt_portscan_opts,
 329 +};
 330 +
 331 +static __attribute__((constructor)) void libipt_portscan_init(void)
 332 +{
 333 +       register_match(&libipt_portscan_info);
 334 +       return;
 335 +}
 336 Index: iptables-1.3.8/extensions/.portscan-test
 337 ===================================================================
 338 --- /dev/null   1970-01-01 00:00:00.000000000 +0000
 339 +++ iptables-1.3.8/extensions/.portscan-test    2007-07-31 15:27:57.000000000 -0500
 340 @@ -0,0 +1,2 @@
 341 +#!/bin/sh
 342 +[ -f "$KERNEL_DIR/include/linux/netfilter/xt_portscan.h" ] && echo "portscan";