[8.09] kernel: refresh patches
[openwrt/svn-archive/archive.git] / 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 @@ config IP_NF_IPTABLES
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 @@ obj-$(CONFIG_IP_NF_MATCH_ECN) += ipt_ecn
912 obj-$(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