target/linux/generic-2.6/patches-2.6.26/110-ipp2p_0.8.1rc1.patch

   1 --- /dev/null
   2 +++ b/include/linux/netfilter_ipv4/ipt_ipp2p.h
   3 @@ -0,0 +1,31 @@
   4 +#ifndef __IPT_IPP2P_H
   5 +#define __IPT_IPP2P_H
   6 +#define IPP2P_VERSION "0.8.1_rc1"
   7 +
   8 +struct ipt_p2p_info {
   9 +    int cmd;
  10 +    int debug;
  11 +};
  12 +
  13 +#endif //__IPT_IPP2P_H
  14 +
  15 +#define SHORT_HAND_IPP2P       1 /* --ipp2p switch*/
  16 +//#define SHORT_HAND_DATA              4 /* --ipp2p-data switch*/
  17 +#define SHORT_HAND_NONE                5 /* no short hand*/
  18 +
  19 +#define IPP2P_EDK              (1 << 1)
  20 +#define IPP2P_DATA_KAZAA       (1 << 2)
  21 +#define IPP2P_DATA_EDK         (1 << 3)
  22 +#define IPP2P_DATA_DC          (1 << 4)
  23 +#define IPP2P_DC               (1 << 5)
  24 +#define IPP2P_DATA_GNU         (1 << 6)
  25 +#define IPP2P_GNU              (1 << 7)
  26 +#define IPP2P_KAZAA            (1 << 8)
  27 +#define IPP2P_BIT              (1 << 9)
  28 +#define IPP2P_APPLE            (1 << 10)
  29 +#define IPP2P_SOUL             (1 << 11)
  30 +#define IPP2P_WINMX            (1 << 12)
  31 +#define IPP2P_ARES             (1 << 13)
  32 +#define IPP2P_MUTE             (1 << 14)
  33 +#define IPP2P_WASTE            (1 << 15)
  34 +#define IPP2P_XDCC             (1 << 16)
  35 --- /dev/null
  36 +++ b/net/ipv4/netfilter/ipt_ipp2p.c
  37 @@ -0,0 +1,856 @@
  38 +#if defined(MODVERSIONS)
  39 +#include <linux/modversions.h>
  40 +#endif
  41 +#include <linux/module.h>
  42 +#include <linux/netfilter_ipv4/ip_tables.h>
  43 +#include <linux/version.h>
  44 +#include <linux/netfilter_ipv4/ipt_ipp2p.h>
  45 +#include <net/tcp.h>
  46 +#include <net/udp.h>
  47 +
  48 +#define get_u8(X,O)  (*(__u8 *)(X + O))
  49 +#define get_u16(X,O)  (*(__u16 *)(X + O))
  50 +#define get_u32(X,O)  (*(__u32 *)(X + O))
  51 +
  52 +MODULE_AUTHOR("Eicke Friedrich/Klaus Degner <ipp2p@ipp2p.org>");
  53 +MODULE_DESCRIPTION("An extension to iptables to identify P2P traffic.");
  54 +MODULE_LICENSE("GPL");
  55 +
  56 +
  57 +/*Search for UDP eDonkey/eMule/Kad commands*/
  58 +int
  59 +udp_search_edk (unsigned char *haystack, int packet_len)
  60 +{
  61 +    unsigned char *t = haystack;
  62 +    t += 8;
  63 +
  64 +       switch (t[0]) {
  65 +               case 0xe3:
  66 +               {       /*edonkey*/
  67 +                       switch (t[1])
  68 +                       {
  69 +                               /* client -> server status request */
  70 +                               case 0x96:
  71 +                                       if (packet_len == 14) return ((IPP2P_EDK * 100) + 50);
  72 +                                       break;
  73 +                               /* server -> client status request */
  74 +                               case 0x97: if (packet_len == 42) return ((IPP2P_EDK * 100) + 51);
  75 +                                       break;
  76 +                                               /* server description request */
  77 +                                               /* e3 2a ff f0 .. | size == 6 */
  78 +                               case 0xa2: if ( (packet_len == 14) && ( get_u16(t,2) == __constant_htons(0xfff0) ) ) return ((IPP2P_EDK * 100) + 52);
  79 +                                       break;
  80 +                                               /* server description response */
  81 +                                               /* e3 a3 ff f0 ..  | size > 40 && size < 200 */
  82 +                               //case 0xa3: return ((IPP2P_EDK * 100) + 53);
  83 +                               //      break;
  84 +                               case 0x9a: if (packet_len==26) return ((IPP2P_EDK * 100) + 54);
  85 +                                       break;
  86 +
  87 +                               case 0x92: if (packet_len==18) return ((IPP2P_EDK * 100) + 55);
  88 +                                       break;
  89 +                       }
  90 +                       break;
  91 +               }
  92 +               case 0xe4:
  93 +               {
  94 +                       switch (t[1])
  95 +                       {
  96 +                                               /* e4 20 .. | size == 43 */
  97 +                               case 0x20: if ((packet_len == 43) && (t[2] != 0x00) && (t[34] != 0x00)) return ((IPP2P_EDK * 100) + 60);
  98 +                                       break;
  99 +                                               /* e4 00 .. 00 | size == 35 ? */
 100 +                               case 0x00: if ((packet_len == 35) && (t[26] == 0x00)) return ((IPP2P_EDK * 100) + 61);
 101 +                                       break;
 102 +                                               /* e4 10 .. 00 | size == 35 ? */
 103 +                               case 0x10: if ((packet_len == 35) && (t[26] == 0x00)) return ((IPP2P_EDK * 100) + 62);
 104 +                                       break;
 105 +                                               /* e4 18 .. 00 | size == 35 ? */
 106 +                               case 0x18: if ((packet_len == 35) && (t[26] == 0x00)) return ((IPP2P_EDK * 100) + 63);
 107 +                                       break;
 108 +                                               /* e4 52 .. | size = 44 */
 109 +                               case 0x52: if (packet_len == 44 ) return ((IPP2P_EDK * 100) + 64);
 110 +                                       break;
 111 +                                               /* e4 58 .. | size == 6 */
 112 +                               case 0x58: if (packet_len == 14 ) return ((IPP2P_EDK * 100) + 65);
 113 +                                       break;
 114 +                                               /* e4 59 .. | size == 2 */
 115 +                               case 0x59: if (packet_len == 10 )return ((IPP2P_EDK * 100) + 66);
 116 +                                       break;
 117 +                                       /* e4 28 .. | packet_len == 52,77,102,127... */
 118 +                               case 0x28: if (((packet_len-52) % 25) == 0) return ((IPP2P_EDK * 100) + 67);
 119 +                                       break;
 120 +                                       /* e4 50 xx xx | size == 4 */
 121 +                               case 0x50: if (packet_len == 12) return ((IPP2P_EDK * 100) + 68);
 122 +                                       break;
 123 +                                       /* e4 40 xx xx | size == 48 */
 124 +                               case 0x40: if (packet_len == 56) return ((IPP2P_EDK * 100) + 69);
 125 +                                       break;
 126 +                       }
 127 +                       break;
 128 +               }
 129 +       } /* end of switch (t[0]) */
 130 +    return 0;
 131 +}/*udp_search_edk*/
 132 +
 133 +
 134 +/*Search for UDP Gnutella commands*/
 135 +int
 136 +udp_search_gnu (unsigned char *haystack, int packet_len)
 137 +{
 138 +    unsigned char *t = haystack;
 139 +    t += 8;
 140 +
 141 +    if (memcmp(t, "GND", 3) == 0) return ((IPP2P_GNU * 100) + 51);
 142 +    if (memcmp(t, "GNUTELLA ", 9) == 0) return ((IPP2P_GNU * 100) + 52);
 143 +    return 0;
 144 +}/*udp_search_gnu*/
 145 +
 146 +
 147 +/*Search for UDP KaZaA commands*/
 148 +int
 149 +udp_search_kazaa (unsigned char *haystack, int packet_len)
 150 +{
 151 +    unsigned char *t = haystack;
 152 +
 153 +    if (t[packet_len-1] == 0x00){
 154 +       t += (packet_len - 6);
 155 +       if (memcmp(t, "KaZaA", 5) == 0) return (IPP2P_KAZAA * 100 +50);
 156 +    }
 157 +
 158 +    return 0;
 159 +}/*udp_search_kazaa*/
 160 +
 161 +/*Search for UDP DirectConnect commands*/
 162 +int
 163 +udp_search_directconnect (unsigned char *haystack, int packet_len)
 164 +{
 165 +    unsigned char *t = haystack;
 166 +    if ((*(t + 8) == 0x24) && (*(t + packet_len - 1) == 0x7c)) {
 167 +       t+=8;
 168 +       if (memcmp(t, "SR ", 3) == 0)                   return ((IPP2P_DC * 100) + 60);
 169 +       if (memcmp(t, "Ping ", 5) == 0)                 return ((IPP2P_DC * 100) + 61);
 170 +    }
 171 +    return 0;
 172 +}/*udp_search_directconnect*/
 173 +
 174 +
 175 +
 176 +/*Search for UDP BitTorrent commands*/
 177 +int
 178 +udp_search_bit (unsigned char *haystack, int packet_len)
 179 +{
 180 +       switch(packet_len)
 181 +       {
 182 +               case 24:
 183 +                       /* ^ 00 00 04 17 27 10 19 80 */
 184 +                       if ((ntohl(get_u32(haystack, 8)) == 0x00000417) && (ntohl(get_u32(haystack, 12)) == 0x27101980))
 185 +                               return (IPP2P_BIT * 100 + 50);
 186 +                       break;
 187 +               case 44:
 188 +                       if (get_u32(haystack, 16) == __constant_htonl(0x00000400) && get_u32(haystack, 36) == __constant_htonl(0x00000104))
 189 +                               return (IPP2P_BIT * 100 + 51);
 190 +                       if (get_u32(haystack, 16) == __constant_htonl(0x00000400))
 191 +                               return (IPP2P_BIT * 100 + 61);
 192 +                       break;
 193 +               case 65:
 194 +                       if (get_u32(haystack, 16) == __constant_htonl(0x00000404) && get_u32(haystack, 36) == __constant_htonl(0x00000104))
 195 +                               return (IPP2P_BIT * 100 + 52);
 196 +                       if (get_u32(haystack, 16) == __constant_htonl(0x00000404))
 197 +                               return (IPP2P_BIT * 100 + 62);
 198 +                       break;
 199 +               case 67:
 200 +                       if (get_u32(haystack, 16) == __constant_htonl(0x00000406) && get_u32(haystack, 36) == __constant_htonl(0x00000104))
 201 +                               return (IPP2P_BIT * 100 + 53);
 202 +                       if (get_u32(haystack, 16) == __constant_htonl(0x00000406))
 203 +                               return (IPP2P_BIT * 100 + 63);
 204 +                       break;
 205 +               case 211:
 206 +                       if (get_u32(haystack, 8) == __constant_htonl(0x00000405))
 207 +                               return (IPP2P_BIT * 100 + 54);
 208 +                       break;
 209 +               case 29:
 210 +                       if ((get_u32(haystack, 8) == __constant_htonl(0x00000401)))
 211 +                               return (IPP2P_BIT * 100 + 55);
 212 +                       break;
 213 +               case 52:
 214 +                       if (get_u32(haystack,8)  == __constant_htonl(0x00000827) &&
 215 +                       get_u32(haystack,12) == __constant_htonl(0x37502950))
 216 +                               return (IPP2P_BIT * 100 + 80);
 217 +                       break;
 218 +               default:
 219 +                       /* this packet does not have a constant size */
 220 +                       if (packet_len >= 40 && get_u32(haystack, 16) == __constant_htonl(0x00000402) && get_u32(haystack, 36) == __constant_htonl(0x00000104))
 221 +                               return (IPP2P_BIT * 100 + 56);
 222 +                       break;
 223 +       }
 224 +
 225 +       /* some extra-bitcomet rules:
 226 +       * "d1:" [a|r] "d2:id20:"
 227 +       */
 228 +       if (packet_len > 30 && get_u8(haystack, 8) == 'd' && get_u8(haystack, 9) == '1' && get_u8(haystack, 10) == ':' )
 229 +       {
 230 +               if (get_u8(haystack, 11) == 'a' || get_u8(haystack, 11) == 'r')
 231 +               {
 232 +                       if (memcmp(haystack+12,"d2:id20:",8)==0)
 233 +                               return (IPP2P_BIT * 100 + 57);
 234 +               }
 235 +       }
 236 +
 237 +#if 0
 238 +       /* bitlord rules */
 239 +       /* packetlen must be bigger than 40 */
 240 +       /* first 4 bytes are zero */
 241 +       if (packet_len > 40 && get_u32(haystack, 8) == 0x00000000)
 242 +       {
 243 +               /* first rule: 00 00 00 00 01 00 00 xx xx xx xx 00 00 00 00*/
 244 +               if (get_u32(haystack, 12) == 0x00000000 &&
 245 +                   get_u32(haystack, 16) == 0x00010000 &&
 246 +                   get_u32(haystack, 24) == 0x00000000 )
 247 +                       return (IPP2P_BIT * 100 + 71);
 248 +
 249 +               /* 00 01 00 00 0d 00 00 xx xx xx xx 00 00 00 00*/
 250 +               if (get_u32(haystack, 12) == 0x00000001 &&
 251 +                   get_u32(haystack, 16) == 0x000d0000 &&
 252 +                   get_u32(haystack, 24) == 0x00000000 )
 253 +                       return (IPP2P_BIT * 100 + 71);
 254 +
 255 +
 256 +       }
 257 +#endif
 258 +
 259 +    return 0;
 260 +}/*udp_search_bit*/
 261 +
 262 +
 263 +
 264 +/*Search for Ares commands*/
 265 +//#define IPP2P_DEBUG_ARES
 266 +int
 267 +search_ares (const unsigned char *payload, const u16 plen)
 268 +//int search_ares (unsigned char *haystack, int packet_len, int head_len)
 269 +{
 270 +//     const unsigned char *t = haystack + head_len;
 271 +
 272 +       /* all ares packets start with  */
 273 +       if (payload[1] == 0 && (plen - payload[0]) == 3)
 274 +       {
 275 +               switch (payload[2])
 276 +               {
 277 +                       case 0x5a:
 278 +                               /* ares connect */
 279 +                               if ( plen == 6 && payload[5] == 0x05 ) return ((IPP2P_ARES * 100) + 1);
 280 +                               break;
 281 +                       case 0x09:
 282 +                               /* ares search, min 3 chars --> 14 bytes
 283 +                                * lets define a search can be up to 30 chars --> max 34 bytes
 284 +                                */
 285 +                               if ( plen >= 14 && plen <= 34 ) return ((IPP2P_ARES * 100) + 1);
 286 +                               break;
 287 +#ifdef IPP2P_DEBUG_ARES
 288 +                       default:
 289 +                       printk(KERN_DEBUG "Unknown Ares command %x recognized, len: %u \n", (unsigned int) payload[2],plen);
 290 +#endif /* IPP2P_DEBUG_ARES */
 291 +               }
 292 +       }
 293 +
 294 +#if 0
 295 +       /* found connect packet: 03 00 5a 04 03 05 */
 296 +       /* new version ares 1.8: 03 00 5a xx xx 05 */
 297 +    if ((plen) == 6){  /* possible connect command*/
 298 +       if ((payload[0] == 0x03) && (payload[1] == 0x00) && (payload[2] == 0x5a) && (payload[5] == 0x05))
 299 +           return ((IPP2P_ARES * 100) + 1);
 300 +    }
 301 +    if ((plen) == 60){ /* possible download command*/
 302 +       if ((payload[59] == 0x0a) && (payload[58] == 0x0a)){
 303 +           if (memcmp(t, "PUSH SHA1:", 10) == 0) /* found download command */
 304 +               return ((IPP2P_ARES * 100) + 2);
 305 +       }
 306 +    }
 307 +#endif
 308 +
 309 +    return 0;
 310 +} /*search_ares*/
 311 +
 312 +/*Search for SoulSeek commands*/
 313 +int
 314 +search_soul (const unsigned char *payload, const u16 plen)
 315 +{
 316 +//#define IPP2P_DEBUG_SOUL
 317 +    /* match: xx xx xx xx | xx = sizeof(payload) - 4 */
 318 +    if (get_u32(payload, 0) == (plen - 4)){
 319 +       const __u32 m=get_u32(payload, 4);
 320 +       /* match 00 yy yy 00, yy can be everything */
 321 +        if ( get_u8(payload, 4) == 0x00 && get_u8(payload, 7) == 0x00 )
 322 +       {
 323 +#ifdef IPP2P_DEBUG_SOUL
 324 +       printk(KERN_DEBUG "0: Soulseek command 0x%x recognized\n",get_u32(payload, 4));
 325 +#endif /* IPP2P_DEBUG_SOUL */
 326 +               return ((IPP2P_SOUL * 100) + 1);
 327 +       }
 328 +
 329 +        /* next match: 01 yy 00 00 | yy can be everything */
 330 +        if ( get_u8(payload, 4) == 0x01 && get_u16(payload, 6) == 0x0000 )
 331 +       {
 332 +#ifdef IPP2P_DEBUG_SOUL
 333 +       printk(KERN_DEBUG "1: Soulseek command 0x%x recognized\n",get_u16(payload, 4));
 334 +#endif /* IPP2P_DEBUG_SOUL */
 335 +               return ((IPP2P_SOUL * 100) + 2);
 336 +       }
 337 +
 338 +       /* other soulseek commandos are: 1-5,7,9,13-18,22,23,26,28,35-37,40-46,50,51,60,62-69,91,92,1001 */
 339 +       /* try to do this in an intelligent way */
 340 +       /* get all small commandos */
 341 +       switch(m)
 342 +       {
 343 +               case 7:
 344 +               case 9:
 345 +               case 22:
 346 +               case 23:
 347 +               case 26:
 348 +               case 28:
 349 +               case 50:
 350 +               case 51:
 351 +               case 60:
 352 +               case 91:
 353 +               case 92:
 354 +               case 1001:
 355 +#ifdef IPP2P_DEBUG_SOUL
 356 +               printk(KERN_DEBUG "2: Soulseek command 0x%x recognized\n",get_u16(payload, 4));
 357 +#endif /* IPP2P_DEBUG_SOUL */
 358 +               return ((IPP2P_SOUL * 100) + 3);
 359 +       }
 360 +
 361 +       if (m > 0 && m < 6 )
 362 +       {
 363 +#ifdef IPP2P_DEBUG_SOUL
 364 +               printk(KERN_DEBUG "3: Soulseek command 0x%x recognized\n",get_u16(payload, 4));
 365 +#endif /* IPP2P_DEBUG_SOUL */
 366 +               return ((IPP2P_SOUL * 100) + 4);
 367 +       }
 368 +       if (m > 12 && m < 19 )
 369 +       {
 370 +#ifdef IPP2P_DEBUG_SOUL
 371 +               printk(KERN_DEBUG "4: Soulseek command 0x%x recognized\n",get_u16(payload, 4));
 372 +#endif /* IPP2P_DEBUG_SOUL */
 373 +               return ((IPP2P_SOUL * 100) + 5);
 374 +       }
 375 +
 376 +       if (m > 34 && m < 38 )
 377 +       {
 378 +#ifdef IPP2P_DEBUG_SOUL
 379 +               printk(KERN_DEBUG "5: Soulseek command 0x%x recognized\n",get_u16(payload, 4));
 380 +#endif /* IPP2P_DEBUG_SOUL */
 381 +               return ((IPP2P_SOUL * 100) + 6);
 382 +       }
 383 +
 384 +       if (m > 39 && m < 47 )
 385 +       {
 386 +#ifdef IPP2P_DEBUG_SOUL
 387 +               printk(KERN_DEBUG "6: Soulseek command 0x%x recognized\n",get_u16(payload, 4));
 388 +#endif /* IPP2P_DEBUG_SOUL */
 389 +               return ((IPP2P_SOUL * 100) + 7);
 390 +       }
 391 +
 392 +       if (m > 61 && m < 70 )
 393 +       {
 394 +#ifdef IPP2P_DEBUG_SOUL
 395 +               printk(KERN_DEBUG "7: Soulseek command 0x%x recognized\n",get_u16(payload, 4));
 396 +#endif /* IPP2P_DEBUG_SOUL */
 397 +               return ((IPP2P_SOUL * 100) + 8);
 398 +       }
 399 +
 400 +#ifdef IPP2P_DEBUG_SOUL
 401 +       printk(KERN_DEBUG "unknown SOULSEEK command: 0x%x, first 16 bit: 0x%x, first 8 bit: 0x%x ,soulseek ???\n",get_u32(payload, 4),get_u16(payload, 4) >> 16,get_u8(payload, 4) >> 24);
 402 +#endif /* IPP2P_DEBUG_SOUL */
 403 +    }
 404 +
 405 +       /* match 14 00 00 00 01 yy 00 00 00 STRING(YY) 01 00 00 00 00 46|50 00 00 00 00 */
 406 +       /* without size at the beginning !!! */
 407 +       if ( get_u32(payload, 0) == 0x14 && get_u8(payload, 4) == 0x01 )
 408 +       {
 409 +               __u32 y=get_u32(payload, 5);
 410 +               /* we need 19 chars + string */
 411 +               if ( (y + 19) <= (plen) )
 412 +               {
 413 +                       const unsigned char *w=payload+9+y;
 414 +                       if (get_u32(w, 0) == 0x01 && ( get_u16(w, 4) == 0x4600 || get_u16(w, 4) == 0x5000) && get_u32(w, 6) == 0x00);
 415 +#ifdef IPP2P_DEBUG_SOUL
 416 +                       printk(KERN_DEBUG "Soulssek special client command recognized\n");
 417 +#endif /* IPP2P_DEBUG_SOUL */
 418 +                       return ((IPP2P_SOUL * 100) + 9);
 419 +               }
 420 +       }
 421 +    return 0;
 422 +}
 423 +
 424 +
 425 +/*Search for WinMX commands*/
 426 +int
 427 +search_winmx (const unsigned char *payload, const u16 plen)
 428 +{
 429 +//#define IPP2P_DEBUG_WINMX
 430 +    if (((plen) == 4) && (memcmp(payload, "SEND", 4) == 0))  return ((IPP2P_WINMX * 100) + 1);
 431 +    if (((plen) == 3) && (memcmp(payload, "GET", 3) == 0))  return ((IPP2P_WINMX * 100) + 2);
 432 +    //if (packet_len < (head_len + 10)) return 0;
 433 +    if (plen < 10) return 0;
 434 +
 435 +    if ((memcmp(payload, "SEND", 4) == 0) || (memcmp(payload, "GET", 3) == 0)){
 436 +        u16 c=4;
 437 +        const u16 end=plen-2;
 438 +        u8 count=0;
 439 +        while (c < end)
 440 +        {
 441 +               if (payload[c]== 0x20 && payload[c+1] == 0x22)
 442 +               {
 443 +                       c++;
 444 +                       count++;
 445 +                       if (count>=2) return ((IPP2P_WINMX * 100) + 3);
 446 +               }
 447 +               c++;
 448 +        }
 449 +    }
 450 +
 451 +    if ( plen == 149 && payload[0] == '8' )
 452 +    {
 453 +#ifdef IPP2P_DEBUG_WINMX
 454 +       printk(KERN_INFO "maybe WinMX\n");
 455 +#endif
 456 +       if (get_u32(payload,17) == 0 && get_u32(payload,21) == 0 && get_u32(payload,25) == 0 &&
 457 +//         get_u32(payload,33) == __constant_htonl(0x71182b1a) && get_u32(payload,37) == __constant_htonl(0x05050000) &&
 458 +//         get_u32(payload,133) == __constant_htonl(0x31097edf) && get_u32(payload,145) == __constant_htonl(0xdcb8f792))
 459 +           get_u16(payload,39) == 0 && get_u16(payload,135) == __constant_htons(0x7edf) && get_u16(payload,147) == __constant_htons(0xf792))
 460 +
 461 +       {
 462 +#ifdef IPP2P_DEBUG_WINMX
 463 +               printk(KERN_INFO "got WinMX\n");
 464 +#endif
 465 +               return ((IPP2P_WINMX * 100) + 4);
 466 +       }
 467 +    }
 468 +    return 0;
 469 +} /*search_winmx*/
 470 +
 471 +
 472 +/*Search for appleJuice commands*/
 473 +int
 474 +search_apple (const unsigned char *payload, const u16 plen)
 475 +{
 476 +    if ( (plen > 7) && (payload[6] == 0x0d) && (payload[7] == 0x0a) && (memcmp(payload, "ajprot", 6) == 0))  return (IPP2P_APPLE * 100);
 477 +
 478 +    return 0;
 479 +}
 480 +
 481 +
 482 +/*Search for BitTorrent commands*/
 483 +int
 484 +search_bittorrent (const unsigned char *payload, const u16 plen)
 485 +{
 486 +    if (plen > 20)
 487 +    {
 488 +       /* test for match 0x13+"BitTorrent protocol" */
 489 +       if (payload[0] == 0x13)
 490 +       {
 491 +               if (memcmp(payload+1, "BitTorrent protocol", 19) == 0) return (IPP2P_BIT * 100);
 492 +       }
 493 +
 494 +       /* get tracker commandos, all starts with GET /
 495 +       * then it can follow: scrape| announce
 496 +       * and then ?hash_info=
 497 +       */
 498 +       if (memcmp(payload,"GET /",5) == 0)
 499 +       {
 500 +               /* message scrape */
 501 +               if ( memcmp(payload+5,"scrape?info_hash=",17)==0 ) return (IPP2P_BIT * 100 + 1);
 502 +               /* message announce */
 503 +               if ( memcmp(payload+5,"announce?info_hash=",19)==0 ) return (IPP2P_BIT * 100 + 2);
 504 +       }
 505 +    }
 506 +    else
 507 +    {
 508 +       /* bitcomet encryptes the first packet, so we have to detect another
 509 +        * one later in the flow */
 510 +        /* first try failed, too many missdetections */
 511 +       //if ( size == 5 && get_u32(t,0) == __constant_htonl(1) && t[4] < 3) return (IPP2P_BIT * 100 + 3);
 512 +
 513 +       /* second try: block request packets */
 514 +       if ( plen == 17 && get_u32(payload,0) == __constant_htonl(0x0d) && payload[4] == 0x06 && get_u32(payload,13) == __constant_htonl(0x4000) ) return (IPP2P_BIT * 100 + 3);
 515 +    }
 516 +
 517 +    return 0;
 518 +}
 519 +
 520 +
 521 +
 522 +/*check for Kazaa get command*/
 523 +int
 524 +search_kazaa (const unsigned char *payload, const u16 plen)
 525 +
 526 +{
 527 +    if ((payload[plen-2] == 0x0d) && (payload[plen-1] == 0x0a) && memcmp(payload, "GET /.hash=", 11) == 0)
 528 +       return (IPP2P_DATA_KAZAA * 100);
 529 +
 530 +    return 0;
 531 +}
 532 +
 533 +
 534 +/*check for gnutella get command*/
 535 +int
 536 +search_gnu (const unsigned char *payload, const u16 plen)
 537 +{
 538 +    if ((payload[plen-2] == 0x0d) && (payload[plen-1] == 0x0a))
 539 +    {
 540 +       if (memcmp(payload, "GET /get/", 9) == 0)       return ((IPP2P_DATA_GNU * 100) + 1);
 541 +       if (memcmp(payload, "GET /uri-res/", 13) == 0) return ((IPP2P_DATA_GNU * 100) + 2);
 542 +    }
 543 +    return 0;
 544 +}
 545 +
 546 +
 547 +/*check for gnutella get commands and other typical data*/
 548 +int
 549 +search_all_gnu (const unsigned char *payload, const u16 plen)
 550 +{
 551 +
 552 +    if ((payload[plen-2] == 0x0d) && (payload[plen-1] == 0x0a))
 553 +    {
 554 +
 555 +       if (memcmp(payload, "GNUTELLA CONNECT/", 17) == 0) return ((IPP2P_GNU * 100) + 1);
 556 +       if (memcmp(payload, "GNUTELLA/", 9) == 0) return ((IPP2P_GNU * 100) + 2);
 557 +
 558 +
 559 +       if ((memcmp(payload, "GET /get/", 9) == 0) || (memcmp(payload, "GET /uri-res/", 13) == 0))
 560 +       {
 561 +               u16 c=8;
 562 +               const u16 end=plen-22;
 563 +               while (c < end) {
 564 +                       if ( payload[c] == 0x0a && payload[c+1] == 0x0d && ((memcmp(&payload[c+2], "X-Gnutella-", 11) == 0) || (memcmp(&payload[c+2], "X-Queue:", 8) == 0)))
 565 +                               return ((IPP2P_GNU * 100) + 3);
 566 +                       c++;
 567 +               }
 568 +       }
 569 +    }
 570 +    return 0;
 571 +}
 572 +
 573 +
 574 +/*check for KaZaA download commands and other typical data*/
 575 +int
 576 +search_all_kazaa (const unsigned char *payload, const u16 plen)
 577 +{
 578 +    if ((payload[plen-2] == 0x0d) && (payload[plen-1] == 0x0a))
 579 +    {
 580 +
 581 +       if (memcmp(payload, "GIVE ", 5) == 0) return ((IPP2P_KAZAA * 100) + 1);
 582 +
 583 +       if (memcmp(payload, "GET /", 5) == 0) {
 584 +               u16 c = 8;
 585 +               const u16 end=plen-22;
 586 +               while (c < end) {
 587 +                       if ( payload[c] == 0x0a && payload[c+1] == 0x0d && ((memcmp(&payload[c+2], "X-Kazaa-Username: ", 18) == 0) || (memcmp(&payload[c+2], "User-Agent: PeerEnabler/", 24) == 0)))
 588 +                               return ((IPP2P_KAZAA * 100) + 2);
 589 +                       c++;
 590 +               }
 591 +       }
 592 +    }
 593 +    return 0;
 594 +}
 595 +
 596 +/*fast check for edonkey file segment transfer command*/
 597 +int
 598 +search_edk (const unsigned char *payload, const u16 plen)
 599 +{
 600 +    if (payload[0] != 0xe3)
 601 +       return 0;
 602 +    else {
 603 +       if (payload[5] == 0x47)
 604 +           return (IPP2P_DATA_EDK * 100);
 605 +       else
 606 +           return 0;
 607 +    }
 608 +}
 609 +
 610 +
 611 +
 612 +/*intensive but slower search for some edonkey packets including size-check*/
 613 +int
 614 +search_all_edk (const unsigned char *payload, const u16 plen)
 615 +{
 616 +    if (payload[0] != 0xe3)
 617 +       return 0;
 618 +    else {
 619 +       //t += head_len;
 620 +       const u16 cmd = get_u16(payload, 1);
 621 +       if (cmd == (plen - 5)) {
 622 +           switch (payload[5]) {
 623 +               case 0x01: return ((IPP2P_EDK * 100) + 1);      /*Client: hello or Server:hello*/
 624 +               case 0x4c: return ((IPP2P_EDK * 100) + 9);      /*Client: Hello-Answer*/
 625 +           }
 626 +       }
 627 +       return 0;
 628 +     }
 629 +}
 630 +
 631 +
 632 +/*fast check for Direct Connect send command*/
 633 +int
 634 +search_dc (const unsigned char *payload, const u16 plen)
 635 +{
 636 +
 637 +    if (payload[0] != 0x24 )
 638 +       return 0;
 639 +    else {
 640 +       if (memcmp(&payload[1], "Send|", 5) == 0)
 641 +           return (IPP2P_DATA_DC * 100);
 642 +       else
 643 +           return 0;
 644 +    }
 645 +
 646 +}
 647 +
 648 +
 649 +/*intensive but slower check for all direct connect packets*/
 650 +int
 651 +search_all_dc (const unsigned char *payload, const u16 plen)
 652 +{
 653 +//    unsigned char *t = haystack;
 654 +
 655 +    if (payload[0] == 0x24 && payload[plen-1] == 0x7c)
 656 +    {
 657 +       const unsigned char *t=&payload[1];
 658 +               /* Client-Hub-Protocol */
 659 +       if (memcmp(t, "Lock ", 5) == 0)                 return ((IPP2P_DC * 100) + 1);
 660 +       /* Client-Client-Protocol, some are already recognized by client-hub (like lock) */
 661 +       if (memcmp(t, "MyNick ", 7) == 0)               return ((IPP2P_DC * 100) + 38);
 662 +    }
 663 +    return 0;
 664 +}
 665 +
 666 +/*check for mute*/
 667 +int
 668 +search_mute (const unsigned char *payload, const u16 plen)
 669 +{
 670 +       if ( plen == 209 || plen == 345 || plen == 473 || plen == 609 || plen == 1121 )
 671 +       {
 672 +               //printk(KERN_DEBUG "size hit: %u",size);
 673 +               if (memcmp(payload,"PublicKey: ",11) == 0 )
 674 +               {
 675 +                       return ((IPP2P_MUTE * 100) + 0);
 676 +
 677 +/*                     if (memcmp(t+size-14,"\x0aEndPublicKey\x0a",14) == 0)
 678 +                       {
 679 +                               printk(KERN_DEBUG "end pubic key hit: %u",size);
 680 +
 681 +                       }*/
 682 +               }
 683 +       }
 684 +       return 0;
 685 +}
 686 +
 687 +
 688 +/* check for xdcc */
 689 +int
 690 +search_xdcc (const unsigned char *payload, const u16 plen)
 691 +{
 692 +       /* search in small packets only */
 693 +       if (plen > 20 && plen < 200 && payload[plen-1] == 0x0a && payload[plen-2] == 0x0d && memcmp(payload,"PRIVMSG ",8) == 0)
 694 +       {
 695 +
 696 +               u16 x=10;
 697 +               const u16 end=plen - 13;
 698 +
 699 +               /* is seems to be a irc private massage, chedck for xdcc command */
 700 +               while (x < end)
 701 +               {
 702 +                       if (payload[x] == ':')
 703 +                       {
 704 +                               if ( memcmp(&payload[x+1],"xdcc send #",11) == 0 )
 705 +                                       return ((IPP2P_XDCC * 100) + 0);
 706 +                       }
 707 +                       x++;
 708 +               }
 709 +       }
 710 +       return 0;
 711 +}
 712 +
 713 +/* search for waste */
 714 +int search_waste(const unsigned char *payload, const u16 plen)
 715 +{
 716 +       if ( plen >= 8 && memcmp(payload,"GET.sha1:",9) == 0)
 717 +               return ((IPP2P_WASTE * 100) + 0);
 718 +
 719 +       return 0;
 720 +}
 721 +
 722 +
 723 +static struct {
 724 +    int command;
 725 +    __u8 short_hand;                   /*for fucntions included in short hands*/
 726 +    int packet_len;
 727 +    int (*function_name) (const unsigned char *, const u16);
 728 +} matchlist[] = {
 729 +    {IPP2P_EDK,SHORT_HAND_IPP2P,20, &search_all_edk},
 730 +//    {IPP2P_DATA_KAZAA,SHORT_HAND_DATA,200, &search_kazaa},
 731 +//    {IPP2P_DATA_EDK,SHORT_HAND_DATA,60, &search_edk},
 732 +//    {IPP2P_DATA_DC,SHORT_HAND_DATA,26, &search_dc},
 733 +    {IPP2P_DC,SHORT_HAND_IPP2P,5, search_all_dc},
 734 +//    {IPP2P_DATA_GNU,SHORT_HAND_DATA,40, &search_gnu},
 735 +    {IPP2P_GNU,SHORT_HAND_IPP2P,5, &search_all_gnu},
 736 +    {IPP2P_KAZAA,SHORT_HAND_IPP2P,5, &search_all_kazaa},
 737 +    {IPP2P_BIT,SHORT_HAND_IPP2P,20, &search_bittorrent},
 738 +    {IPP2P_APPLE,SHORT_HAND_IPP2P,5, &search_apple},
 739 +    {IPP2P_SOUL,SHORT_HAND_IPP2P,5, &search_soul},
 740 +    {IPP2P_WINMX,SHORT_HAND_IPP2P,2, &search_winmx},
 741 +    {IPP2P_ARES,SHORT_HAND_IPP2P,5, &search_ares},
 742 +    {IPP2P_MUTE,SHORT_HAND_NONE,200, &search_mute},
 743 +    {IPP2P_WASTE,SHORT_HAND_NONE,5, &search_waste},
 744 +    {IPP2P_XDCC,SHORT_HAND_NONE,5, &search_xdcc},
 745 +    {0,0,0,NULL}
 746 +};
 747 +
 748 +
 749 +static struct {
 750 +    int command;
 751 +    __u8 short_hand;                   /*for fucntions included in short hands*/
 752 +    int packet_len;
 753 +    int (*function_name) (unsigned char *, int);
 754 +} udp_list[] = {
 755 +    {IPP2P_KAZAA,SHORT_HAND_IPP2P,14, &udp_search_kazaa},
 756 +    {IPP2P_BIT,SHORT_HAND_IPP2P,23, &udp_search_bit},
 757 +    {IPP2P_GNU,SHORT_HAND_IPP2P,11, &udp_search_gnu},
 758 +    {IPP2P_EDK,SHORT_HAND_IPP2P,9, &udp_search_edk},
 759 +    {IPP2P_DC,SHORT_HAND_IPP2P,12, &udp_search_directconnect},
 760 +    {0,0,0,NULL}
 761 +};
 762 +
 763 +
 764 +static bool
 765 +match(const struct sk_buff *skb,
 766 +      const struct net_device *in,
 767 +      const struct net_device *out,
 768 +      const struct xt_match *match,
 769 +      const void *matchinfo,
 770 +      int offset,
 771 +      unsigned int protoff,
 772 +      bool *hotdrop)
 773 +{
 774 +    const struct ipt_p2p_info *info = matchinfo;
 775 +    unsigned char  *haystack;
 776 +    struct iphdr *ip = ip_hdr(skb);
 777 +    int p2p_result = 0, i = 0;
 778 +//    int head_len;
 779 +    int hlen = ntohs(ip->tot_len)-(ip->ihl*4); /*hlen = packet-data length*/
 780 +
 781 +    /*must not be a fragment*/
 782 +    if (offset) {
 783 +       if (info->debug) printk("IPP2P.match: offset found %i \n",offset);
 784 +       return 0;
 785 +    }
 786 +
 787 +    /*make sure that skb is linear*/
 788 +    if(skb_is_nonlinear(skb)){
 789 +       if (info->debug) printk("IPP2P.match: nonlinear skb found\n");
 790 +       return 0;
 791 +    }
 792 +
 793 +
 794 +    haystack=(char *)ip+(ip->ihl*4);           /*haystack = packet data*/
 795 +
 796 +    switch (ip->protocol){
 797 +       case IPPROTO_TCP:               /*what to do with a TCP packet*/
 798 +       {
 799 +           struct tcphdr *tcph = (void *) ip + ip->ihl * 4;
 800 +
 801 +           if (tcph->fin) return 0;  /*if FIN bit is set bail out*/
 802 +           if (tcph->syn) return 0;  /*if SYN bit is set bail out*/
 803 +           if (tcph->rst) return 0;  /*if RST bit is set bail out*/
 804 +
 805 +           haystack += tcph->doff * 4; /*get TCP-Header-Size*/
 806 +           hlen -= tcph->doff * 4;
 807 +           while (matchlist[i].command) {
 808 +               if ((((info->cmd & matchlist[i].command) == matchlist[i].command) ||
 809 +                   ((info->cmd & matchlist[i].short_hand) == matchlist[i].short_hand)) &&
 810 +                   (hlen > matchlist[i].packet_len)) {
 811 +                           p2p_result = matchlist[i].function_name(haystack, hlen);
 812 +                           if (p2p_result)
 813 +                           {
 814 +                               if (info->debug) printk("IPP2P.debug:TCP-match: %i from: %u.%u.%u.%u:%i to: %u.%u.%u.%u:%i Length: %i\n",
 815 +                                   p2p_result, NIPQUAD(ip->saddr),ntohs(tcph->source), NIPQUAD(ip->daddr),ntohs(tcph->dest),hlen);
 816 +                               return p2p_result;
 817 +                           }
 818 +               }
 819 +           i++;
 820 +           }
 821 +           return p2p_result;
 822 +       }
 823 +
 824 +       case IPPROTO_UDP:               /*what to do with an UDP packet*/
 825 +       {
 826 +           struct udphdr *udph = (void *) ip + ip->ihl * 4;
 827 +
 828 +           while (udp_list[i].command){
 829 +               if ((((info->cmd & udp_list[i].command) == udp_list[i].command) ||
 830 +                   ((info->cmd & udp_list[i].short_hand) == udp_list[i].short_hand)) &&
 831 +                   (hlen > udp_list[i].packet_len)) {
 832 +                           p2p_result = udp_list[i].function_name(haystack, hlen);
 833 +                           if (p2p_result){
 834 +                               if (info->debug) printk("IPP2P.debug:UDP-match: %i from: %u.%u.%u.%u:%i to: %u.%u.%u.%u:%i Length: %i\n",
 835 +                                   p2p_result, NIPQUAD(ip->saddr),ntohs(udph->source), NIPQUAD(ip->daddr),ntohs(udph->dest),hlen);
 836 +                               return p2p_result;
 837 +                           }
 838 +               }
 839 +           i++;
 840 +           }
 841 +           return p2p_result;
 842 +       }
 843 +
 844 +       default: return 0;
 845 +    }
 846 +}
 847 +
 848 +
 849 +
 850 +static bool
 851 +checkentry(const char *tablename,
 852 +           const void *ip,
 853 +           const struct xt_match *match,
 854 +           void *matchinfo,
 855 +           unsigned int hook_mask)
 856 +{
 857 +        /* Must specify -p tcp */
 858 +/*    if (ip->proto != IPPROTO_TCP || (ip->invflags & IPT_INV_PROTO)) {
 859 + *     printk("ipp2p: Only works on TCP packets, use -p tcp\n");
 860 + *     return 0;
 861 + *    }*/
 862 +    return 1;
 863 +}
 864 +
 865 +
 866 +
 867 +
 868 +static struct ipt_match ipp2p_match = {
 869 +       .name           = "ipp2p",
 870 +       .match          = &match,
 871 +       .family         = AF_INET,
 872 +       .matchsize      = sizeof(struct ipt_p2p_info),
 873 +       .checkentry     = &checkentry,
 874 +       .me             = THIS_MODULE,
 875 +};
 876 +
 877 +
 878 +static int __init init(void)
 879 +{
 880 +    printk(KERN_INFO "IPP2P v%s loading\n", IPP2P_VERSION);
 881 +    return xt_register_match(&ipp2p_match);
 882 +}
 883 +
 884 +static void __exit fini(void)
 885 +{
 886 +    xt_unregister_match(&ipp2p_match);
 887 +    printk(KERN_INFO "IPP2P v%s unloaded\n", IPP2P_VERSION);
 888 +}
 889 +
 890 +module_init(init);
 891 +module_exit(fini);
 892 +
 893 +
 894 --- a/net/ipv4/netfilter/Kconfig
 895 +++ b/net/ipv4/netfilter/Kconfig
 896 @@ -57,6 +57,12 @@
 897           To compile it as a module, choose M here.  If unsure, say N.
 898
 899  # The matches.
 900 +config IP_NF_MATCH_IPP2P
 901 +       tristate "IPP2P"
 902 +       depends on IP_NF_IPTABLES
 903 +       help
 904 +         Module for matching traffic of various Peer-to-Peer applications
 905 +
 906  config IP_NF_MATCH_RECENT
 907         tristate '"recent" match support'
 908         depends on IP_NF_IPTABLES
 909 --- a/net/ipv4/netfilter/Makefile
 910 +++ b/net/ipv4/netfilter/Makefile
 911 @@ -50,6 +50,8 @@
 912  obj-$(CONFIG_IP_NF_MATCH_RECENT) += ipt_recent.o
 913  obj-$(CONFIG_IP_NF_MATCH_TTL) += ipt_ttl.o
 914
 915 +obj-$(CONFIG_IP_NF_MATCH_IPP2P) += ipt_ipp2p.o
 916 +
 917  # targets
 918  obj-$(CONFIG_IP_NF_TARGET_CLUSTERIP) += ipt_CLUSTERIP.o
 919  obj-$(CONFIG_IP_NF_TARGET_ECN) += ipt_ECN.o