1 diff -Naur linux-2.6.23.17.org/include/linux/netfilter_ipv4/ipt_ipp2p.h linux-2.6.23.17/include/linux/netfilter_ipv4/ipt_ipp2p.h
2 --- linux-2.6.23.17.org/include/linux/netfilter_ipv4/ipt_ipp2p.h 1970-01-01 00:00:00.000000000 +0000
3 +++ linux-2.6.23.17/include/linux/netfilter_ipv4/ipt_ipp2p.h 2008-09-22 21:58:41.000000000 +0000
7 +#define IPP2P_VERSION "0.8.2-pomng"
14 +#endif //__IPT_IPP2P_H
16 +#define SHORT_HAND_IPP2P 1 /* --ipp2p switch*/
17 +//#define SHORT_HAND_DATA 4 /* --ipp2p-data switch*/
18 +#define SHORT_HAND_NONE 5 /* no short hand*/
20 +#define IPP2P_EDK (1 << 1)
21 +#define IPP2P_DATA_KAZAA (1 << 2)
22 +#define IPP2P_DATA_EDK (1 << 3)
23 +#define IPP2P_DATA_DC (1 << 4)
24 +#define IPP2P_DC (1 << 5)
25 +#define IPP2P_DATA_GNU (1 << 6)
26 +#define IPP2P_GNU (1 << 7)
27 +#define IPP2P_KAZAA (1 << 8)
28 +#define IPP2P_BIT (1 << 9)
29 +#define IPP2P_APPLE (1 << 10)
30 +#define IPP2P_SOUL (1 << 11)
31 +#define IPP2P_WINMX (1 << 12)
32 +#define IPP2P_ARES (1 << 13)
33 +#define IPP2P_MUTE (1 << 14)
34 +#define IPP2P_WASTE (1 << 15)
35 +#define IPP2P_XDCC (1 << 16)
36 diff -Naur linux-2.6.23.17.org/net/ipv4/netfilter/Kconfig linux-2.6.23.17/net/ipv4/netfilter/Kconfig
37 --- linux-2.6.23.17.org/net/ipv4/netfilter/Kconfig 2008-02-26 00:14:28.000000000 +0000
38 +++ linux-2.6.23.17/net/ipv4/netfilter/Kconfig 2008-09-22 21:58:41.000000000 +0000
40 Allows altering the ARP packet payload: source and destination
41 hardware and network addresses.
43 +config IP_NF_MATCH_IPP2P
44 + tristate 'IPP2P match support'
45 + depends on IP_NF_IPTABLES
47 + This option makes possible to match some P2P packets
48 + therefore helps controlling such traffic.
50 + If you want to compile it as a module, say M here and read
51 + <file:Documentation/modules.txt>. If unsure, say `N'.
55 diff -Naur linux-2.6.23.17.org/net/ipv4/netfilter/Makefile linux-2.6.23.17/net/ipv4/netfilter/Makefile
56 --- linux-2.6.23.17.org/net/ipv4/netfilter/Makefile 2008-02-26 00:14:28.000000000 +0000
57 +++ linux-2.6.23.17/net/ipv4/netfilter/Makefile 2008-09-22 21:58:41.000000000 +0000
59 obj-$(CONFIG_IP_NF_MATCH_OWNER) += ipt_owner.o
60 obj-$(CONFIG_IP_NF_MATCH_TOS) += ipt_tos.o
61 obj-$(CONFIG_IP_NF_MATCH_RECENT) += ipt_recent.o
62 +obj-$(CONFIG_IP_NF_MATCH_IPP2P) += ipt_ipp2p.o
63 obj-$(CONFIG_IP_NF_MATCH_ECN) += ipt_ecn.o
64 obj-$(CONFIG_IP_NF_MATCH_AH) += ipt_ah.o
65 obj-$(CONFIG_IP_NF_MATCH_TTL) += ipt_ttl.o
66 diff -Naur linux-2.6.23.17.org/net/ipv4/netfilter/ipt_ipp2p.c linux-2.6.23.17/net/ipv4/netfilter/ipt_ipp2p.c
67 --- linux-2.6.23.17.org/net/ipv4/netfilter/ipt_ipp2p.c 1970-01-01 00:00:00.000000000 +0000
68 +++ linux-2.6.23.17/net/ipv4/netfilter/ipt_ipp2p.c 2008-09-22 21:58:41.000000000 +0000
70 +#if defined(MODVERSIONS)
71 +#include <linux/modversions.h>
73 +#include <linux/module.h>
74 +#include <linux/version.h>
75 +#include <linux/netfilter_ipv4/ip_tables.h>
76 +#include <linux/netfilter_ipv4/ipt_ipp2p.h>
80 +#define get_u8(X,O) (*(__u8 *)(X + O))
81 +#define get_u16(X,O) (*(__u16 *)(X + O))
82 +#define get_u32(X,O) (*(__u32 *)(X + O))
84 +MODULE_AUTHOR("Eicke Friedrich/Klaus Degner <ipp2p@ipp2p.org>");
85 +MODULE_DESCRIPTION("An extension to iptables to identify P2P traffic.");
86 +MODULE_LICENSE("GPL");
89 +/*Search for UDP eDonkey/eMule/Kad commands*/
91 +udp_search_edk (unsigned char *haystack, int packet_len)
93 + unsigned char *t = haystack;
101 + /* client -> server status request */
103 + if (packet_len == 14) return ((IPP2P_EDK * 100) + 50);
105 + /* server -> client status request */
106 + case 0x97: if (packet_len == 42) return ((IPP2P_EDK * 100) + 51);
108 + /* server description request */
109 + /* e3 2a ff f0 .. | size == 6 */
110 + case 0xa2: if ( (packet_len == 14) && ( get_u16(t,2) == __constant_htons(0xfff0) ) ) return ((IPP2P_EDK * 100) + 52);
112 + /* server description response */
113 + /* e3 a3 ff f0 .. | size > 40 && size < 200 */
114 + //case 0xa3: return ((IPP2P_EDK * 100) + 53);
116 + case 0x9a: if (packet_len==26) return ((IPP2P_EDK * 100) + 54);
119 + case 0x92: if (packet_len==18) return ((IPP2P_EDK * 100) + 55);
128 + /* e4 20 .. | size == 43 */
129 + case 0x20: if ((packet_len == 43) && (t[2] != 0x00) && (t[34] != 0x00)) return ((IPP2P_EDK * 100) + 60);
131 + /* e4 00 .. 00 | size == 35 ? */
132 + case 0x00: if ((packet_len == 35) && (t[26] == 0x00)) return ((IPP2P_EDK * 100) + 61);
134 + /* e4 10 .. 00 | size == 35 ? */
135 + case 0x10: if ((packet_len == 35) && (t[26] == 0x00)) return ((IPP2P_EDK * 100) + 62);
137 + /* e4 18 .. 00 | size == 35 ? */
138 + case 0x18: if ((packet_len == 35) && (t[26] == 0x00)) return ((IPP2P_EDK * 100) + 63);
140 + /* e4 52 .. | size = 44 */
141 + case 0x52: if (packet_len == 44 ) return ((IPP2P_EDK * 100) + 64);
143 + /* e4 58 .. | size == 6 */
144 + case 0x58: if (packet_len == 14 ) return ((IPP2P_EDK * 100) + 65);
146 + /* e4 59 .. | size == 2 */
147 + case 0x59: if (packet_len == 10 )return ((IPP2P_EDK * 100) + 66);
149 + /* e4 28 .. | packet_len == 52,77,102,127... */
150 + case 0x28: if (((packet_len-52) % 25) == 0) return ((IPP2P_EDK * 100) + 67);
152 + /* e4 50 xx xx | size == 4 */
153 + case 0x50: if (packet_len == 12) return ((IPP2P_EDK * 100) + 68);
155 + /* e4 40 xx xx | size == 48 */
156 + case 0x40: if (packet_len == 56) return ((IPP2P_EDK * 100) + 69);
161 + } /* end of switch (t[0]) */
166 +/*Search for UDP Gnutella commands*/
168 +udp_search_gnu (unsigned char *haystack, int packet_len)
170 + unsigned char *t = haystack;
173 + if (memcmp(t, "GND", 3) == 0) return ((IPP2P_GNU * 100) + 51);
174 + if (memcmp(t, "GNUTELLA ", 9) == 0) return ((IPP2P_GNU * 100) + 52);
179 +/*Search for UDP KaZaA commands*/
181 +udp_search_kazaa (unsigned char *haystack, int packet_len)
183 + unsigned char *t = haystack;
185 + if (t[packet_len-1] == 0x00){
186 + t += (packet_len - 6);
187 + if (memcmp(t, "KaZaA", 5) == 0) return (IPP2P_KAZAA * 100 +50);
191 +}/*udp_search_kazaa*/
193 +/*Search for UDP DirectConnect commands*/
195 +udp_search_directconnect (unsigned char *haystack, int packet_len)
197 + unsigned char *t = haystack;
198 + if ((*(t + 8) == 0x24) && (*(t + packet_len - 1) == 0x7c)) {
200 + if (memcmp(t, "SR ", 3) == 0) return ((IPP2P_DC * 100) + 60);
201 + if (memcmp(t, "Ping ", 5) == 0) return ((IPP2P_DC * 100) + 61);
204 +}/*udp_search_directconnect*/
208 +/*Search for UDP BitTorrent commands*/
210 +udp_search_bit (unsigned char *haystack, int packet_len)
215 + /* ^ 00 00 04 17 27 10 19 80 */
216 + if ((ntohl(get_u32(haystack, 8)) == 0x00000417) && (ntohl(get_u32(haystack, 12)) == 0x27101980))
217 + return (IPP2P_BIT * 100 + 50);
220 + if (get_u32(haystack, 16) == __constant_htonl(0x00000400) && get_u32(haystack, 36) == __constant_htonl(0x00000104))
221 + return (IPP2P_BIT * 100 + 51);
222 + if (get_u32(haystack, 16) == __constant_htonl(0x00000400))
223 + return (IPP2P_BIT * 100 + 61);
226 + if (get_u32(haystack, 16) == __constant_htonl(0x00000404) && get_u32(haystack, 36) == __constant_htonl(0x00000104))
227 + return (IPP2P_BIT * 100 + 52);
228 + if (get_u32(haystack, 16) == __constant_htonl(0x00000404))
229 + return (IPP2P_BIT * 100 + 62);
232 + if (get_u32(haystack, 16) == __constant_htonl(0x00000406) && get_u32(haystack, 36) == __constant_htonl(0x00000104))
233 + return (IPP2P_BIT * 100 + 53);
234 + if (get_u32(haystack, 16) == __constant_htonl(0x00000406))
235 + return (IPP2P_BIT * 100 + 63);
238 + if (get_u32(haystack, 8) == __constant_htonl(0x00000405))
239 + return (IPP2P_BIT * 100 + 54);
242 + if ((get_u32(haystack, 8) == __constant_htonl(0x00000401)))
243 + return (IPP2P_BIT * 100 + 55);
246 + if (get_u32(haystack,8) == __constant_htonl(0x00000827) &&
247 + get_u32(haystack,12) == __constant_htonl(0x37502950))
248 + return (IPP2P_BIT * 100 + 80);
251 + /* this packet does not have a constant size */
252 + if (packet_len >= 40 && get_u32(haystack, 16) == __constant_htonl(0x00000402) && get_u32(haystack, 36) == __constant_htonl(0x00000104))
253 + return (IPP2P_BIT * 100 + 56);
257 + /* some extra-bitcomet rules:
258 + * "d1:" [a|r] "d2:id20:"
260 + if (packet_len > 30 && get_u8(haystack, 8) == 'd' && get_u8(haystack, 9) == '1' && get_u8(haystack, 10) == ':' )
262 + if (get_u8(haystack, 11) == 'a' || get_u8(haystack, 11) == 'r')
264 + if (memcmp(haystack+12,"d2:id20:",8)==0)
265 + return (IPP2P_BIT * 100 + 57);
270 + /* bitlord rules */
271 + /* packetlen must be bigger than 40 */
272 + /* first 4 bytes are zero */
273 + if (packet_len > 40 && get_u32(haystack, 8) == 0x00000000)
275 + /* first rule: 00 00 00 00 01 00 00 xx xx xx xx 00 00 00 00*/
276 + if (get_u32(haystack, 12) == 0x00000000 &&
277 + get_u32(haystack, 16) == 0x00010000 &&
278 + get_u32(haystack, 24) == 0x00000000 )
279 + return (IPP2P_BIT * 100 + 71);
281 + /* 00 01 00 00 0d 00 00 xx xx xx xx 00 00 00 00*/
282 + if (get_u32(haystack, 12) == 0x00000001 &&
283 + get_u32(haystack, 16) == 0x000d0000 &&
284 + get_u32(haystack, 24) == 0x00000000 )
285 + return (IPP2P_BIT * 100 + 71);
296 +/*Search for Ares commands*/
297 +//#define IPP2P_DEBUG_ARES
299 +search_ares (const unsigned char *payload, const u16 plen)
300 +//int search_ares (unsigned char *haystack, int packet_len, int head_len)
302 +// const unsigned char *t = haystack + head_len;
304 + /* all ares packets start with */
305 + if (payload[1] == 0 && (plen - payload[0]) == 3)
307 + switch (payload[2])
311 + if ( plen == 6 && payload[5] == 0x05 ) return ((IPP2P_ARES * 100) + 1);
314 + /* ares search, min 3 chars --> 14 bytes
315 + * lets define a search can be up to 30 chars --> max 34 bytes
317 + if ( plen >= 14 && plen <= 34 ) return ((IPP2P_ARES * 100) + 1);
319 +#ifdef IPP2P_DEBUG_ARES
321 + printk(KERN_DEBUG "Unknown Ares command %x recognized, len: %u \n", (unsigned int) payload[2],plen);
322 +#endif /* IPP2P_DEBUG_ARES */
327 + /* found connect packet: 03 00 5a 04 03 05 */
328 + /* new version ares 1.8: 03 00 5a xx xx 05 */
329 + if ((plen) == 6){ /* possible connect command*/
330 + if ((payload[0] == 0x03) && (payload[1] == 0x00) && (payload[2] == 0x5a) && (payload[5] == 0x05))
331 + return ((IPP2P_ARES * 100) + 1);
333 + if ((plen) == 60){ /* possible download command*/
334 + if ((payload[59] == 0x0a) && (payload[58] == 0x0a)){
335 + if (memcmp(t, "PUSH SHA1:", 10) == 0) /* found download command */
336 + return ((IPP2P_ARES * 100) + 2);
344 +/*Search for SoulSeek commands*/
346 +search_soul (const unsigned char *payload, const u16 plen)
348 +//#define IPP2P_DEBUG_SOUL
349 + /* match: xx xx xx xx | xx = sizeof(payload) - 4 */
350 + if (get_u32(payload, 0) == (plen - 4)){
351 + const __u32 m=get_u32(payload, 4);
352 + /* match 00 yy yy 00, yy can be everything */
353 + if ( get_u8(payload, 4) == 0x00 && get_u8(payload, 7) == 0x00 )
355 +#ifdef IPP2P_DEBUG_SOUL
356 + printk(KERN_DEBUG "0: Soulseek command 0x%x recognized\n",get_u32(payload, 4));
357 +#endif /* IPP2P_DEBUG_SOUL */
358 + return ((IPP2P_SOUL * 100) + 1);
361 + /* next match: 01 yy 00 00 | yy can be everything */
362 + if ( get_u8(payload, 4) == 0x01 && get_u16(payload, 6) == 0x0000 )
364 +#ifdef IPP2P_DEBUG_SOUL
365 + printk(KERN_DEBUG "1: Soulseek command 0x%x recognized\n",get_u16(payload, 4));
366 +#endif /* IPP2P_DEBUG_SOUL */
367 + return ((IPP2P_SOUL * 100) + 2);
370 + /* 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 */
371 + /* try to do this in an intelligent way */
372 + /* get all small commandos */
387 +#ifdef IPP2P_DEBUG_SOUL
388 + printk(KERN_DEBUG "2: Soulseek command 0x%x recognized\n",get_u16(payload, 4));
389 +#endif /* IPP2P_DEBUG_SOUL */
390 + return ((IPP2P_SOUL * 100) + 3);
393 + if (m > 0 && m < 6 )
395 +#ifdef IPP2P_DEBUG_SOUL
396 + printk(KERN_DEBUG "3: Soulseek command 0x%x recognized\n",get_u16(payload, 4));
397 +#endif /* IPP2P_DEBUG_SOUL */
398 + return ((IPP2P_SOUL * 100) + 4);
400 + if (m > 12 && m < 19 )
402 +#ifdef IPP2P_DEBUG_SOUL
403 + printk(KERN_DEBUG "4: Soulseek command 0x%x recognized\n",get_u16(payload, 4));
404 +#endif /* IPP2P_DEBUG_SOUL */
405 + return ((IPP2P_SOUL * 100) + 5);
408 + if (m > 34 && m < 38 )
410 +#ifdef IPP2P_DEBUG_SOUL
411 + printk(KERN_DEBUG "5: Soulseek command 0x%x recognized\n",get_u16(payload, 4));
412 +#endif /* IPP2P_DEBUG_SOUL */
413 + return ((IPP2P_SOUL * 100) + 6);
416 + if (m > 39 && m < 47 )
418 +#ifdef IPP2P_DEBUG_SOUL
419 + printk(KERN_DEBUG "6: Soulseek command 0x%x recognized\n",get_u16(payload, 4));
420 +#endif /* IPP2P_DEBUG_SOUL */
421 + return ((IPP2P_SOUL * 100) + 7);
424 + if (m > 61 && m < 70 )
426 +#ifdef IPP2P_DEBUG_SOUL
427 + printk(KERN_DEBUG "7: Soulseek command 0x%x recognized\n",get_u16(payload, 4));
428 +#endif /* IPP2P_DEBUG_SOUL */
429 + return ((IPP2P_SOUL * 100) + 8);
432 +#ifdef IPP2P_DEBUG_SOUL
433 + 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);
434 +#endif /* IPP2P_DEBUG_SOUL */
437 + /* match 14 00 00 00 01 yy 00 00 00 STRING(YY) 01 00 00 00 00 46|50 00 00 00 00 */
438 + /* without size at the beginning !!! */
439 + if ( get_u32(payload, 0) == 0x14 && get_u8(payload, 4) == 0x01 )
441 + __u32 y=get_u32(payload, 5);
442 + /* we need 19 chars + string */
443 + if ( (y + 19) <= (plen) )
445 + const unsigned char *w=payload+9+y;
446 + if (get_u32(w, 0) == 0x01 && ( get_u16(w, 4) == 0x4600 || get_u16(w, 4) == 0x5000) && get_u32(w, 6) == 0x00);
447 +#ifdef IPP2P_DEBUG_SOUL
448 + printk(KERN_DEBUG "Soulssek special client command recognized\n");
449 +#endif /* IPP2P_DEBUG_SOUL */
450 + return ((IPP2P_SOUL * 100) + 9);
457 +/*Search for WinMX commands*/
459 +search_winmx (const unsigned char *payload, const u16 plen)
461 +//#define IPP2P_DEBUG_WINMX
462 + if (((plen) == 4) && (memcmp(payload, "SEND", 4) == 0)) return ((IPP2P_WINMX * 100) + 1);
463 + if (((plen) == 3) && (memcmp(payload, "GET", 3) == 0)) return ((IPP2P_WINMX * 100) + 2);
464 + //if (packet_len < (head_len + 10)) return 0;
465 + if (plen < 10) return 0;
467 + if ((memcmp(payload, "SEND", 4) == 0) || (memcmp(payload, "GET", 3) == 0)){
469 + const u16 end=plen-2;
473 + if (payload[c]== 0x20 && payload[c+1] == 0x22)
477 + if (count>=2) return ((IPP2P_WINMX * 100) + 3);
483 + if ( plen == 149 && payload[0] == '8' )
485 +#ifdef IPP2P_DEBUG_WINMX
486 + printk(KERN_INFO "maybe WinMX\n");
488 + if (get_u32(payload,17) == 0 && get_u32(payload,21) == 0 && get_u32(payload,25) == 0 &&
489 +// get_u32(payload,33) == __constant_htonl(0x71182b1a) && get_u32(payload,37) == __constant_htonl(0x05050000) &&
490 +// get_u32(payload,133) == __constant_htonl(0x31097edf) && get_u32(payload,145) == __constant_htonl(0xdcb8f792))
491 + get_u16(payload,39) == 0 && get_u16(payload,135) == __constant_htons(0x7edf) && get_u16(payload,147) == __constant_htons(0xf792))
494 +#ifdef IPP2P_DEBUG_WINMX
495 + printk(KERN_INFO "got WinMX\n");
497 + return ((IPP2P_WINMX * 100) + 4);
504 +/*Search for appleJuice commands*/
506 +search_apple (const unsigned char *payload, const u16 plen)
508 + if ( (plen > 7) && (payload[6] == 0x0d) && (payload[7] == 0x0a) && (memcmp(payload, "ajprot", 6) == 0)) return (IPP2P_APPLE * 100);
514 +/*Search for BitTorrent commands*/
516 +search_bittorrent (const unsigned char *payload, const u16 plen)
520 + /* test for match 0x13+"BitTorrent protocol" */
521 + if (payload[0] == 0x13)
523 + if (memcmp(payload+1, "BitTorrent protocol", 19) == 0) return (IPP2P_BIT * 100);
526 + /* get tracker commandos, all starts with GET /
527 + * then it can follow: scrape| announce
528 + * and then ?hash_info=
530 + if (memcmp(payload,"GET /",5) == 0)
532 + /* message scrape */
533 + if ( memcmp(payload+5,"scrape?info_hash=",17)==0 ) return (IPP2P_BIT * 100 + 1);
534 + /* message announce */
535 + if ( memcmp(payload+5,"announce?info_hash=",19)==0 ) return (IPP2P_BIT * 100 + 2);
540 + /* bitcomet encryptes the first packet, so we have to detect another
541 + * one later in the flow */
542 + /* first try failed, too many missdetections */
543 + //if ( size == 5 && get_u32(t,0) == __constant_htonl(1) && t[4] < 3) return (IPP2P_BIT * 100 + 3);
545 + /* second try: block request packets */
546 + 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);
554 +/*check for Kazaa get command*/
556 +search_kazaa (const unsigned char *payload, const u16 plen)
559 + if ((payload[plen-2] == 0x0d) && (payload[plen-1] == 0x0a) && memcmp(payload, "GET /.hash=", 11) == 0)
560 + return (IPP2P_DATA_KAZAA * 100);
566 +/*check for gnutella get command*/
568 +search_gnu (const unsigned char *payload, const u16 plen)
570 + if ((payload[plen-2] == 0x0d) && (payload[plen-1] == 0x0a))
572 + if (memcmp(payload, "GET /get/", 9) == 0) return ((IPP2P_DATA_GNU * 100) + 1);
573 + if (memcmp(payload, "GET /uri-res/", 13) == 0) return ((IPP2P_DATA_GNU * 100) + 2);
579 +/*check for gnutella get commands and other typical data*/
581 +search_all_gnu (const unsigned char *payload, const u16 plen)
584 + if ((payload[plen-2] == 0x0d) && (payload[plen-1] == 0x0a))
587 + if (memcmp(payload, "GNUTELLA CONNECT/", 17) == 0) return ((IPP2P_GNU * 100) + 1);
588 + if (memcmp(payload, "GNUTELLA/", 9) == 0) return ((IPP2P_GNU * 100) + 2);
591 + if ((memcmp(payload, "GET /get/", 9) == 0) || (memcmp(payload, "GET /uri-res/", 13) == 0))
594 + const u16 end=plen-22;
596 + if ( payload[c] == 0x0a && payload[c+1] == 0x0d && ((memcmp(&payload[c+2], "X-Gnutella-", 11) == 0) || (memcmp(&payload[c+2], "X-Queue:", 8) == 0)))
597 + return ((IPP2P_GNU * 100) + 3);
606 +/*check for KaZaA download commands and other typical data*/
608 +search_all_kazaa (const unsigned char *payload, const u16 plen)
610 + if ((payload[plen-2] == 0x0d) && (payload[plen-1] == 0x0a))
613 + if (memcmp(payload, "GIVE ", 5) == 0) return ((IPP2P_KAZAA * 100) + 1);
615 + if (memcmp(payload, "GET /", 5) == 0) {
617 + const u16 end=plen-22;
619 + 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)))
620 + return ((IPP2P_KAZAA * 100) + 2);
628 +/*fast check for edonkey file segment transfer command*/
630 +search_edk (const unsigned char *payload, const u16 plen)
632 + if (payload[0] != 0xe3)
635 + if (payload[5] == 0x47)
636 + return (IPP2P_DATA_EDK * 100);
644 +/*intensive but slower search for some edonkey packets including size-check*/
646 +search_all_edk (const unsigned char *payload, const u16 plen)
648 + if (payload[0] != 0xe3)
652 + const u16 cmd = get_u16(payload, 1);
653 + if (cmd == (plen - 5)) {
654 + switch (payload[5]) {
655 + case 0x01: return ((IPP2P_EDK * 100) + 1); /*Client: hello or Server:hello*/
656 + case 0x4c: return ((IPP2P_EDK * 100) + 9); /*Client: Hello-Answer*/
664 +/*fast check for Direct Connect send command*/
666 +search_dc (const unsigned char *payload, const u16 plen)
669 + if (payload[0] != 0x24 )
672 + if (memcmp(&payload[1], "Send|", 5) == 0)
673 + return (IPP2P_DATA_DC * 100);
681 +/*intensive but slower check for all direct connect packets*/
683 +search_all_dc (const unsigned char *payload, const u16 plen)
685 +// unsigned char *t = haystack;
687 + if (payload[0] == 0x24 && payload[plen-1] == 0x7c)
689 + const unsigned char *t=&payload[1];
690 + /* Client-Hub-Protocol */
691 + if (memcmp(t, "Lock ", 5) == 0) return ((IPP2P_DC * 100) + 1);
692 + /* Client-Client-Protocol, some are already recognized by client-hub (like lock) */
693 + if (memcmp(t, "MyNick ", 7) == 0) return ((IPP2P_DC * 100) + 38);
700 +search_mute (const unsigned char *payload, const u16 plen)
702 + if ( plen == 209 || plen == 345 || plen == 473 || plen == 609 || plen == 1121 )
704 + //printk(KERN_DEBUG "size hit: %u",size);
705 + if (memcmp(payload,"PublicKey: ",11) == 0 )
707 + return ((IPP2P_MUTE * 100) + 0);
709 +/* if (memcmp(t+size-14,"\x0aEndPublicKey\x0a",14) == 0)
711 + printk(KERN_DEBUG "end pubic key hit: %u",size);
720 +/* check for xdcc */
722 +search_xdcc (const unsigned char *payload, const u16 plen)
724 + /* search in small packets only */
725 + if (plen > 20 && plen < 200 && payload[plen-1] == 0x0a && payload[plen-2] == 0x0d && memcmp(payload,"PRIVMSG ",8) == 0)
729 + const u16 end=plen - 13;
731 + /* is seems to be a irc private massage, chedck for xdcc command */
734 + if (payload[x] == ':')
736 + if ( memcmp(&payload[x+1],"xdcc send #",11) == 0 )
737 + return ((IPP2P_XDCC * 100) + 0);
745 +/* search for waste */
746 +int search_waste(const unsigned char *payload, const u16 plen)
748 + if ( plen >= 8 && memcmp(payload,"GET.sha1:",9) == 0)
749 + return ((IPP2P_WASTE * 100) + 0);
757 + __u8 short_hand; /*for fucntions included in short hands*/
759 + int (*function_name) (const unsigned char *, const u16);
761 + {IPP2P_EDK,SHORT_HAND_IPP2P,20, &search_all_edk},
762 +// {IPP2P_DATA_KAZAA,SHORT_HAND_DATA,200, &search_kazaa},
763 +// {IPP2P_DATA_EDK,SHORT_HAND_DATA,60, &search_edk},
764 +// {IPP2P_DATA_DC,SHORT_HAND_DATA,26, &search_dc},
765 + {IPP2P_DC,SHORT_HAND_IPP2P,5, search_all_dc},
766 +// {IPP2P_DATA_GNU,SHORT_HAND_DATA,40, &search_gnu},
767 + {IPP2P_GNU,SHORT_HAND_IPP2P,5, &search_all_gnu},
768 + {IPP2P_KAZAA,SHORT_HAND_IPP2P,5, &search_all_kazaa},
769 + {IPP2P_BIT,SHORT_HAND_IPP2P,20, &search_bittorrent},
770 + {IPP2P_APPLE,SHORT_HAND_IPP2P,5, &search_apple},
771 + {IPP2P_SOUL,SHORT_HAND_IPP2P,5, &search_soul},
772 + {IPP2P_WINMX,SHORT_HAND_IPP2P,2, &search_winmx},
773 + {IPP2P_ARES,SHORT_HAND_IPP2P,5, &search_ares},
774 + {IPP2P_MUTE,SHORT_HAND_NONE,200, &search_mute},
775 + {IPP2P_WASTE,SHORT_HAND_NONE,5, &search_waste},
776 + {IPP2P_XDCC,SHORT_HAND_NONE,5, &search_xdcc},
783 + __u8 short_hand; /*for fucntions included in short hands*/
785 + int (*function_name) (unsigned char *, int);
787 + { IPP2P_KAZAA, SHORT_HAND_IPP2P, 14, &udp_search_kazaa},
788 + { IPP2P_BIT, SHORT_HAND_IPP2P, 23, &udp_search_bit},
789 + { IPP2P_GNU, SHORT_HAND_IPP2P, 11, &udp_search_gnu},
790 + { IPP2P_EDK, SHORT_HAND_IPP2P, 9, &udp_search_edk},
791 + { IPP2P_DC, SHORT_HAND_IPP2P, 12, &udp_search_directconnect},
795 +#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,23)
800 +match(const struct sk_buff *skb,
801 + const struct net_device *in,
802 + const struct net_device *out,
803 +#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,17)
804 + const struct xt_match *match,
806 + const void *matchinfo,
808 +#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0)
812 +#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,16)
813 + unsigned int protoff,
815 +#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,23)
821 + const struct ipt_p2p_info *info = matchinfo;
822 + unsigned char *haystack;
823 +#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,22)
824 + struct iphdr *ip = ip_hdr(skb);
826 + struct iphdr *ip = skb->nh.iph;
828 + int p2p_result = 0, i = 0;
830 + int hlen = ntohs(ip->tot_len)-(ip->ihl*4); /*hlen = packet-data length*/
832 + /*must not be a fragment*/
834 + if (info->debug) printk("IPP2P.match: offset found %i \n",offset);
838 + /*make sure that skb is linear*/
839 + if(skb_is_nonlinear(skb)){
840 + if (info->debug) printk("IPP2P.match: nonlinear skb found\n");
845 + haystack=(char *)ip+(ip->ihl*4); /*haystack = packet data*/
847 + switch (ip->protocol){
848 + case IPPROTO_TCP: /*what to do with a TCP packet*/
850 + struct tcphdr *tcph = (void *) ip + ip->ihl * 4;
852 + if (tcph->fin) return 0; /*if FIN bit is set bail out*/
853 + if (tcph->syn) return 0; /*if SYN bit is set bail out*/
854 + if (tcph->rst) return 0; /*if RST bit is set bail out*/
856 + haystack += tcph->doff * 4; /*get TCP-Header-Size*/
857 + hlen -= tcph->doff * 4;
858 + while (matchlist[i].command) {
859 + if ((((info->cmd & matchlist[i].command) == matchlist[i].command) ||
860 + ((info->cmd & matchlist[i].short_hand) == matchlist[i].short_hand)) &&
861 + (hlen > matchlist[i].packet_len)) {
862 + p2p_result = matchlist[i].function_name(haystack, hlen);
865 + if (info->debug) printk("IPP2P.debug:TCP-match: %i from: %u.%u.%u.%u:%i to: %u.%u.%u.%u:%i Length: %i\n",
866 + p2p_result, NIPQUAD(ip->saddr),ntohs(tcph->source), NIPQUAD(ip->daddr),ntohs(tcph->dest),hlen);
875 + case IPPROTO_UDP: /*what to do with an UDP packet*/
877 + struct udphdr *udph = (void *) ip + ip->ihl * 4;
879 + while (udp_list[i].command){
880 + if ((((info->cmd & udp_list[i].command) == udp_list[i].command) ||
881 + ((info->cmd & udp_list[i].short_hand) == udp_list[i].short_hand)) &&
882 + (hlen > udp_list[i].packet_len)) {
883 + p2p_result = udp_list[i].function_name(haystack, hlen);
885 + if (info->debug) printk("IPP2P.debug:UDP-match: %i from: %u.%u.%u.%u:%i to: %u.%u.%u.%u:%i Length: %i\n",
886 + p2p_result, NIPQUAD(ip->saddr),ntohs(udph->source), NIPQUAD(ip->daddr),ntohs(udph->dest),hlen);
899 +#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,23)
904 +checkentry(const char *tablename,
905 +#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,16)
908 + const struct ipt_ip *ip,
910 +#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,17)
911 + const struct xt_match *match,
914 +#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,19)
915 + unsigned int matchsize,
917 + unsigned int hook_mask)
919 + /* Must specify -p tcp */
920 +/* if (ip->proto != IPPROTO_TCP || (ip->invflags & IPT_INV_PROTO)) {
921 + * printk("ipp2p: Only works on TCP packets, use -p tcp\n");
929 +#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,21)
930 +static struct xt_match ipp2p_match = {
932 +static struct ipt_match ipp2p_match = {
934 +#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0)
942 +#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
944 +#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,21)
948 +#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,17)
949 + .matchsize = sizeof(struct ipt_p2p_info),
951 + .checkentry = &checkentry,
957 +static int __init init(void)
959 + printk(KERN_INFO "IPP2P v%s loading\n", IPP2P_VERSION);
960 +#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,21)
961 + return xt_register_match(&ipp2p_match);
963 + return ipt_register_match(&ipp2p_match);
967 +static void __exit fini(void)
969 +#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,21)
970 + xt_unregister_match(&ipp2p_match);
972 + ipt_unregister_match(&ipp2p_match);
974 + printk(KERN_INFO "IPP2P v%s unloaded\n", IPP2P_VERSION);