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[ipfire-2.x.git] / src / patches / linux-3.0-ipp2p-0.8.2-ipfire.patch
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AF		 1diff -Naur linux-3.0.24.org/include/linux/netfilter_ipv4/ipt_ipp2p.h linux-3.0.24/include/linux/netfilter_ipv4/ipt_ipp2p.h
2--- linux-3.0.24.org/include/linux/netfilter_ipv4/ipt_ipp2p.h 1970-01-01 01:00:00.000000000 +0100
3+++ linux-3.0.24/include/linux/netfilter_ipv4/ipt_ipp2p.h 2012-03-20 09:29:20.616541362 +0100
4@@ -0,0 +1,31 @@
5+#ifndef __IPT_IPP2P_H
6+#define __IPT_IPP2P_H
7+#define IPP2P_VERSION "0.8.2-ipfire"
8+
9+struct ipt_p2p_info {
10+ int cmd;
11+ int debug;
12+};
13+
14+#endif //__IPT_IPP2P_H
15+
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*/
19+
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)
36diff -Naur linux-3.0.24.org/net/ipv4/netfilter/ipt_ipp2p.c linux-3.0.24/net/ipv4/netfilter/ipt_ipp2p.c
37--- linux-3.0.24.org/net/ipv4/netfilter/ipt_ipp2p.c 1970-01-01 01:00:00.000000000 +0100
38+++ linux-3.0.24/net/ipv4/netfilter/ipt_ipp2p.c 2012-03-20 11:26:38.593101443 +0100
39@@ -0,0 +1,970 @@
40+#if defined(MODVERSIONS)
41+#include <linux/modversions.h>
42+#endif
43+#include <linux/module.h>
44+#include <linux/version.h>
45+#include <linux/netfilter_ipv4/ip_tables.h>
46+#include <linux/netfilter_ipv4/ipt_ipp2p.h>
47+#include <net/tcp.h>
48+#include <net/udp.h>
49+
50+#define get_u8(X,O) (*(__u8 *)(X + O))
51+#define get_u16(X,O) (*(__u16 *)(X + O))
52+#define get_u32(X,O) (*(__u32 *)(X + O))
53+
54+MODULE_AUTHOR("Eicke Friedrich/Klaus Degner <ipp2p@ipp2p.org>");
55+MODULE_DESCRIPTION("An extension to iptables to identify P2P traffic.");
56+MODULE_LICENSE("GPL");
57+
58+
59+/*Search for UDP eDonkey/eMule/Kad commands*/
60+int
61+udp_search_edk (unsigned char *haystack, int packet_len)
62+{
63+ unsigned char *t = haystack;
64+ t += 8;
65+
66+ switch (t[0]) {
67+ case 0xe3:
68+ { /*edonkey*/
69+ switch (t[1])
70+ {
71+ /* client -> server status request */
72+ case 0x96:
73+ if (packet_len == 14) return ((IPP2P_EDK * 100) + 50);
74+ break;
75+ /* server -> client status request */
76+ case 0x97: if (packet_len == 42) return ((IPP2P_EDK * 100) + 51);
77+ break;
78+ /* server description request */
79+ /* e3 2a ff f0 .. | size == 6 */
80+ case 0xa2: if ( (packet_len == 14) && ( get_u16(t,2) == __constant_htons(0xfff0) ) ) return ((IPP2P_EDK * 100) + 52);
81+ break;
82+ /* server description response */
83+ /* e3 a3 ff f0 .. | size > 40 && size < 200 */
84+ //case 0xa3: return ((IPP2P_EDK * 100) + 53);
85+ // break;
86+ case 0x9a: if (packet_len==26) return ((IPP2P_EDK * 100) + 54);
87+ break;
88+
89+ case 0x92: if (packet_len==18) return ((IPP2P_EDK * 100) + 55);
90+ break;
91+ }
92+ break;
93+ }
94+ case 0xe4:
95+ {
96+ switch (t[1])
97+ {
98+ /* e4 20 .. | size == 43 */
99+ case 0x20: if ((packet_len == 43) && (t[2] != 0x00) && (t[34] != 0x00)) return ((IPP2P_EDK * 100) + 60);
100+ break;
101+ /* e4 00 .. 00 | size == 35 ? */
102+ case 0x00: if ((packet_len == 35) && (t[26] == 0x00)) return ((IPP2P_EDK * 100) + 61);
103+ break;
104+ /* e4 10 .. 00 | size == 35 ? */
105+ case 0x10: if ((packet_len == 35) && (t[26] == 0x00)) return ((IPP2P_EDK * 100) + 62);
106+ break;
107+ /* e4 18 .. 00 | size == 35 ? */
108+ case 0x18: if ((packet_len == 35) && (t[26] == 0x00)) return ((IPP2P_EDK * 100) + 63);
109+ break;
110+ /* e4 52 .. | size = 44 */
111+ case 0x52: if (packet_len == 44 ) return ((IPP2P_EDK * 100) + 64);
112+ break;
113+ /* e4 58 .. | size == 6 */
114+ case 0x58: if (packet_len == 14 ) return ((IPP2P_EDK * 100) + 65);
115+ break;
116+ /* e4 59 .. | size == 2 */
117+ case 0x59: if (packet_len == 10 )return ((IPP2P_EDK * 100) + 66);
118+ break;
119+ /* e4 28 .. | packet_len == 52,77,102,127... */
120+ case 0x28: if (((packet_len-52) % 25) == 0) return ((IPP2P_EDK * 100) + 67);
121+ break;
122+ /* e4 50 xx xx | size == 4 */
123+ case 0x50: if (packet_len == 12) return ((IPP2P_EDK * 100) + 68);
124+ break;
125+ /* e4 40 xx xx | size == 48 */
126+ case 0x40: if (packet_len == 56) return ((IPP2P_EDK * 100) + 69);
127+ break;
128+ }
129+ break;
130+ }
131+ } /* end of switch (t[0]) */
132+ return 0;
133+}/*udp_search_edk*/
134+
135+
136+/*Search for UDP Gnutella commands*/
137+int
138+udp_search_gnu (unsigned char *haystack, int packet_len)
139+{
140+ unsigned char *t = haystack;
141+ t += 8;
142+
143+ if (memcmp(t, "GND", 3) == 0) return ((IPP2P_GNU * 100) + 51);
144+ if (memcmp(t, "GNUTELLA ", 9) == 0) return ((IPP2P_GNU * 100) + 52);
145+ return 0;
146+}/*udp_search_gnu*/
147+
148+
149+/*Search for UDP KaZaA commands*/
150+int
151+udp_search_kazaa (unsigned char *haystack, int packet_len)
152+{
153+ unsigned char *t = haystack;
154+
155+ if (t[packet_len-1] == 0x00){
156+ t += (packet_len - 6);
157+ if (memcmp(t, "KaZaA", 5) == 0) return (IPP2P_KAZAA * 100 +50);
158+ }
159+
160+ return 0;
161+}/*udp_search_kazaa*/
162+
163+/*Search for UDP DirectConnect commands*/
164+int
165+udp_search_directconnect (unsigned char *haystack, int packet_len)
166+{
167+ unsigned char *t = haystack;
168+ if ((*(t + 8) == 0x24) && (*(t + packet_len - 1) == 0x7c)) {
169+ t+=8;
170+ if (memcmp(t, "SR ", 3) == 0) return ((IPP2P_DC * 100) + 60);
171+ if (memcmp(t, "Ping ", 5) == 0) return ((IPP2P_DC * 100) + 61);
172+ }
173+ return 0;
174+}/*udp_search_directconnect*/
175+
176+
177+
178+/*Search for UDP BitTorrent commands*/
179+int
180+udp_search_bit (unsigned char *haystack, int packet_len)
181+{
182+ switch(packet_len)
183+ {
184+ case 24:
185+ /* ^ 00 00 04 17 27 10 19 80 */
186+ if ((ntohl(get_u32(haystack, 8)) == 0x00000417) && (ntohl(get_u32(haystack, 12)) == 0x27101980))
187+ return (IPP2P_BIT * 100 + 50);
188+ break;
189+ case 44:
190+ if (get_u32(haystack, 16) == __constant_htonl(0x00000400) && get_u32(haystack, 36) == __constant_htonl(0x00000104))
191+ return (IPP2P_BIT * 100 + 51);
192+ if (get_u32(haystack, 16) == __constant_htonl(0x00000400))
193+ return (IPP2P_BIT * 100 + 61);
194+ break;
195+ case 65:
196+ if (get_u32(haystack, 16) == __constant_htonl(0x00000404) && get_u32(haystack, 36) == __constant_htonl(0x00000104))
197+ return (IPP2P_BIT * 100 + 52);
198+ if (get_u32(haystack, 16) == __constant_htonl(0x00000404))
199+ return (IPP2P_BIT * 100 + 62);
200+ break;
201+ case 67:
202+ if (get_u32(haystack, 16) == __constant_htonl(0x00000406) && get_u32(haystack, 36) == __constant_htonl(0x00000104))
203+ return (IPP2P_BIT * 100 + 53);
204+ if (get_u32(haystack, 16) == __constant_htonl(0x00000406))
205+ return (IPP2P_BIT * 100 + 63);
206+ break;
207+ case 211:
208+ if (get_u32(haystack, 8) == __constant_htonl(0x00000405))
209+ return (IPP2P_BIT * 100 + 54);
210+ break;
211+ case 29:
212+ if ((get_u32(haystack, 8) == __constant_htonl(0x00000401)))
213+ return (IPP2P_BIT * 100 + 55);
214+ break;
215+ case 52:
216+ if (get_u32(haystack,8) == __constant_htonl(0x00000827) &&
217+ get_u32(haystack,12) == __constant_htonl(0x37502950))
218+ return (IPP2P_BIT * 100 + 80);
219+ break;
220+ default:
221+ /* this packet does not have a constant size */
222+ if (packet_len >= 40 && get_u32(haystack, 16) == __constant_htonl(0x00000402) && get_u32(haystack, 36) == __constant_htonl(0x00000104))
223+ return (IPP2P_BIT * 100 + 56);
224+ break;
225+ }
226+
227+ /* some extra-bitcomet rules:
228+ * "d1:" [a|r] "d2:id20:"
229+ */
230+ if (packet_len > 30 && get_u8(haystack, 8) == 'd' && get_u8(haystack, 9) == '1' && get_u8(haystack, 10) == ':' )
231+ {
232+ if (get_u8(haystack, 11) == 'a' || get_u8(haystack, 11) == 'r')
233+ {
234+ if (memcmp(haystack+12,"d2:id20:",8)==0)
235+ return (IPP2P_BIT * 100 + 57);
236+ }
237+ }
238+
239+#if 0
240+ /* bitlord rules */
241+ /* packetlen must be bigger than 40 */
242+ /* first 4 bytes are zero */
243+ if (packet_len > 40 && get_u32(haystack, 8) == 0x00000000)
244+ {
245+ /* first rule: 00 00 00 00 01 00 00 xx xx xx xx 00 00 00 00*/
246+ if (get_u32(haystack, 12) == 0x00000000 &&
247+ get_u32(haystack, 16) == 0x00010000 &&
248+ get_u32(haystack, 24) == 0x00000000 )
249+ return (IPP2P_BIT * 100 + 71);
250+
251+ /* 00 01 00 00 0d 00 00 xx xx xx xx 00 00 00 00*/
252+ if (get_u32(haystack, 12) == 0x00000001 &&
253+ get_u32(haystack, 16) == 0x000d0000 &&
254+ get_u32(haystack, 24) == 0x00000000 )
255+ return (IPP2P_BIT * 100 + 71);
256+
257+
258+ }
259+#endif
260+
261+ return 0;
262+}/*udp_search_bit*/
263+
264+
265+
266+/*Search for Ares commands*/
267+//#define IPP2P_DEBUG_ARES
268+int
269+search_ares (const unsigned char *payload, const u16 plen)
270+//int search_ares (unsigned char *haystack, int packet_len, int head_len)
271+{
272+// const unsigned char *t = haystack + head_len;
273+
274+ /* all ares packets start with */
275+ if (payload[1] == 0 && (plen - payload[0]) == 3)
276+ {
277+ switch (payload[2])
278+ {
279+ case 0x5a:
280+ /* ares connect */
281+ if ( plen == 6 && payload[5] == 0x05 ) return ((IPP2P_ARES * 100) + 1);
282+ break;
283+ case 0x09:
284+ /* ares search, min 3 chars --> 14 bytes
285+ * lets define a search can be up to 30 chars --> max 34 bytes
286+ */
287+ if ( plen >= 14 && plen <= 34 ) return ((IPP2P_ARES * 100) + 1);
288+ break;
289+#ifdef IPP2P_DEBUG_ARES
290+ default:
291+ printk(KERN_DEBUG "Unknown Ares command %x recognized, len: %u \n", (unsigned int) payload[2],plen);
292+#endif /* IPP2P_DEBUG_ARES */
293+ }
294+ }
295+
296+#if 0
297+ /* found connect packet: 03 00 5a 04 03 05 */
298+ /* new version ares 1.8: 03 00 5a xx xx 05 */
299+ if ((plen) == 6){ /* possible connect command*/
300+ if ((payload[0] == 0x03) && (payload[1] == 0x00) && (payload[2] == 0x5a) && (payload[5] == 0x05))
301+ return ((IPP2P_ARES * 100) + 1);
302+ }
303+ if ((plen) == 60){ /* possible download command*/
304+ if ((payload[59] == 0x0a) && (payload[58] == 0x0a)){
305+ if (memcmp(t, "PUSH SHA1:", 10) == 0) /* found download command */
306+ return ((IPP2P_ARES * 100) + 2);
307+ }
308+ }
309+#endif
310+
311+ return 0;
312+} /*search_ares*/
313+
314+/*Search for SoulSeek commands*/
315+int
316+search_soul (const unsigned char *payload, const u16 plen)
317+{
318+//#define IPP2P_DEBUG_SOUL
319+ /* match: xx xx xx xx | xx = sizeof(payload) - 4 */
320+ if (get_u32(payload, 0) == (plen - 4)){
321+ const __u32 m=get_u32(payload, 4);
322+ /* match 00 yy yy 00, yy can be everything */
323+ if ( get_u8(payload, 4) == 0x00 && get_u8(payload, 7) == 0x00 )
324+ {
325+#ifdef IPP2P_DEBUG_SOUL
326+ printk(KERN_DEBUG "0: Soulseek command 0x%x recognized\n",get_u32(payload, 4));
327+#endif /* IPP2P_DEBUG_SOUL */
328+ return ((IPP2P_SOUL * 100) + 1);
329+ }
330+
331+ /* next match: 01 yy 00 00 | yy can be everything */
332+ if ( get_u8(payload, 4) == 0x01 && get_u16(payload, 6) == 0x0000 )
333+ {
334+#ifdef IPP2P_DEBUG_SOUL
335+ printk(KERN_DEBUG "1: Soulseek command 0x%x recognized\n",get_u16(payload, 4));
336+#endif /* IPP2P_DEBUG_SOUL */
337+ return ((IPP2P_SOUL * 100) + 2);
338+ }
339+
340+ /* 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 */
341+ /* try to do this in an intelligent way */
342+ /* get all small commandos */
343+ switch(m)
344+ {
345+ case 7:
346+ case 9:
347+ case 22:
348+ case 23:
349+ case 26:
350+ case 28:
351+ case 50:
352+ case 51:
353+ case 60:
354+ case 91:
355+ case 92:
356+ case 1001:
357+#ifdef IPP2P_DEBUG_SOUL
358+ printk(KERN_DEBUG "2: Soulseek command 0x%x recognized\n",get_u16(payload, 4));
359+#endif /* IPP2P_DEBUG_SOUL */
360+ return ((IPP2P_SOUL * 100) + 3);
361+ }
362+
363+ if (m > 0 && m < 6 )
364+ {
365+#ifdef IPP2P_DEBUG_SOUL
366+ printk(KERN_DEBUG "3: Soulseek command 0x%x recognized\n",get_u16(payload, 4));
367+#endif /* IPP2P_DEBUG_SOUL */
368+ return ((IPP2P_SOUL * 100) + 4);
369+ }
370+ if (m > 12 && m < 19 )
371+ {
372+#ifdef IPP2P_DEBUG_SOUL
373+ printk(KERN_DEBUG "4: Soulseek command 0x%x recognized\n",get_u16(payload, 4));
374+#endif /* IPP2P_DEBUG_SOUL */
375+ return ((IPP2P_SOUL * 100) + 5);
376+ }
377+
378+ if (m > 34 && m < 38 )
379+ {
380+#ifdef IPP2P_DEBUG_SOUL
381+ printk(KERN_DEBUG "5: Soulseek command 0x%x recognized\n",get_u16(payload, 4));
382+#endif /* IPP2P_DEBUG_SOUL */
383+ return ((IPP2P_SOUL * 100) + 6);
384+ }
385+
386+ if (m > 39 && m < 47 )
387+ {
388+#ifdef IPP2P_DEBUG_SOUL
389+ printk(KERN_DEBUG "6: Soulseek command 0x%x recognized\n",get_u16(payload, 4));
390+#endif /* IPP2P_DEBUG_SOUL */
391+ return ((IPP2P_SOUL * 100) + 7);
392+ }
393+
394+ if (m > 61 && m < 70 )
395+ {
396+#ifdef IPP2P_DEBUG_SOUL
397+ printk(KERN_DEBUG "7: Soulseek command 0x%x recognized\n",get_u16(payload, 4));
398+#endif /* IPP2P_DEBUG_SOUL */
399+ return ((IPP2P_SOUL * 100) + 8);
400+ }
401+
402+#ifdef IPP2P_DEBUG_SOUL
403+ 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);
404+#endif /* IPP2P_DEBUG_SOUL */
405+ }
406+
407+ /* match 14 00 00 00 01 yy 00 00 00 STRING(YY) 01 00 00 00 00 46|50 00 00 00 00 */
408+ /* without size at the beginning !!! */
409+ if ( get_u32(payload, 0) == 0x14 && get_u8(payload, 4) == 0x01 )
410+ {
411+ __u32 y=get_u32(payload, 5);
412+ /* we need 19 chars + string */
413+ if ( (y + 19) <= (plen) )
414+ {
415+ const unsigned char *w=payload+9+y;
416+ if (get_u32(w, 0) == 0x01 && ( get_u16(w, 4) == 0x4600 || get_u16(w, 4) == 0x5000) && get_u32(w, 6) == 0x00);
417+#ifdef IPP2P_DEBUG_SOUL
418+ printk(KERN_DEBUG "Soulssek special client command recognized\n");
419+#endif /* IPP2P_DEBUG_SOUL */
420+ return ((IPP2P_SOUL * 100) + 9);
421+ }
422+ }
423+ return 0;
424+}
425+
426+
427+/*Search for WinMX commands*/
428+int
429+search_winmx (const unsigned char *payload, const u16 plen)
430+{
431+//#define IPP2P_DEBUG_WINMX
432+ if (((plen) == 4) && (memcmp(payload, "SEND", 4) == 0)) return ((IPP2P_WINMX * 100) + 1);
433+ if (((plen) == 3) && (memcmp(payload, "GET", 3) == 0)) return ((IPP2P_WINMX * 100) + 2);
434+ //if (packet_len < (head_len + 10)) return 0;
435+ if (plen < 10) return 0;
436+
437+ if ((memcmp(payload, "SEND", 4) == 0) || (memcmp(payload, "GET", 3) == 0)){
438+ u16 c=4;
439+ const u16 end=plen-2;
440+ u8 count=0;
441+ while (c < end)
442+ {
443+ if (payload[c]== 0x20 && payload[c+1] == 0x22)
444+ {
445+ c++;
446+ count++;
447+ if (count>=2) return ((IPP2P_WINMX * 100) + 3);
448+ }
449+ c++;
450+ }
451+ }
452+
453+ if ( plen == 149 && payload[0] == '8' )
454+ {
455+#ifdef IPP2P_DEBUG_WINMX
456+ printk(KERN_INFO "maybe WinMX\n");
457+#endif
458+ if (get_u32(payload,17) == 0 && get_u32(payload,21) == 0 && get_u32(payload,25) == 0 &&
459+// get_u32(payload,33) == __constant_htonl(0x71182b1a) && get_u32(payload,37) == __constant_htonl(0x05050000) &&
460+// get_u32(payload,133) == __constant_htonl(0x31097edf) && get_u32(payload,145) == __constant_htonl(0xdcb8f792))
461+ get_u16(payload,39) == 0 && get_u16(payload,135) == __constant_htons(0x7edf) && get_u16(payload,147) == __constant_htons(0xf792))
462+
463+ {
464+#ifdef IPP2P_DEBUG_WINMX
465+ printk(KERN_INFO "got WinMX\n");
466+#endif
467+ return ((IPP2P_WINMX * 100) + 4);
468+ }
469+ }
470+ return 0;
471+} /*search_winmx*/
472+
473+
474+/*Search for appleJuice commands*/
475+int
476+search_apple (const unsigned char *payload, const u16 plen)
477+{
478+ if ( (plen > 7) && (payload[6] == 0x0d) && (payload[7] == 0x0a) && (memcmp(payload, "ajprot", 6) == 0)) return (IPP2P_APPLE * 100);
479+
480+ return 0;
481+}
482+
483+
484+/*Search for BitTorrent commands*/
485+int
486+search_bittorrent (const unsigned char *payload, const u16 plen)
487+{
488+ if (plen > 20)
489+ {
490+ /* test for match 0x13+"BitTorrent protocol" */
491+ if (payload[0] == 0x13)
492+ {
493+ if (memcmp(payload+1, "BitTorrent protocol", 19) == 0) return (IPP2P_BIT * 100);
494+ }
495+
496+ /* get tracker commandos, all starts with GET /
497+ * then it can follow: scrape| announce
498+ * and then ?hash_info=
499+ */
500+ if (memcmp(payload,"GET /",5) == 0)
501+ {
502+ /* message scrape */
503+ if ( memcmp(payload+5,"scrape?info_hash=",17)==0 ) return (IPP2P_BIT * 100 + 1);
504+ /* message announce */
505+ if ( memcmp(payload+5,"announce?info_hash=",19)==0 ) return (IPP2P_BIT * 100 + 2);
506+ }
507+ }
508+ else
509+ {
510+ /* bitcomet encryptes the first packet, so we have to detect another
511+ * one later in the flow */
512+ /* first try failed, too many missdetections */
513+ //if ( size == 5 && get_u32(t,0) == __constant_htonl(1) && t[4] < 3) return (IPP2P_BIT * 100 + 3);
514+
515+ /* second try: block request packets */
516+ 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);
517+ }
518+
519+ return 0;
520+}
521+
522+
523+
524+/*check for Kazaa get command*/
525+int
526+search_kazaa (const unsigned char *payload, const u16 plen)
527+
528+{
529+ if ((payload[plen-2] == 0x0d) && (payload[plen-1] == 0x0a) && memcmp(payload, "GET /.hash=", 11) == 0)
530+ return (IPP2P_DATA_KAZAA * 100);
531+
532+ return 0;
533+}
534+
535+
536+/*check for gnutella get command*/
537+int
538+search_gnu (const unsigned char *payload, const u16 plen)
539+{
540+ if ((payload[plen-2] == 0x0d) && (payload[plen-1] == 0x0a))
541+ {
542+ if (memcmp(payload, "GET /get/", 9) == 0) return ((IPP2P_DATA_GNU * 100) + 1);
543+ if (memcmp(payload, "GET /uri-res/", 13) == 0) return ((IPP2P_DATA_GNU * 100) + 2);
544+ }
545+ return 0;
546+}
547+
548+
549+/*check for gnutella get commands and other typical data*/
550+int
551+search_all_gnu (const unsigned char *payload, const u16 plen)
552+{
553+
554+ if ((payload[plen-2] == 0x0d) && (payload[plen-1] == 0x0a))
555+ {
556+
557+ if (memcmp(payload, "GNUTELLA CONNECT/", 17) == 0) return ((IPP2P_GNU * 100) + 1);
558+ if (memcmp(payload, "GNUTELLA/", 9) == 0) return ((IPP2P_GNU * 100) + 2);
559+
560+
561+ if ((memcmp(payload, "GET /get/", 9) == 0) || (memcmp(payload, "GET /uri-res/", 13) == 0))
562+ {
563+ u16 c=8;
564+ const u16 end=plen-22;
565+ while (c < end) {
566+ if ( payload[c] == 0x0a && payload[c+1] == 0x0d && ((memcmp(&payload[c+2], "X-Gnutella-", 11) == 0) || (memcmp(&payload[c+2], "X-Queue:", 8) == 0)))
567+ return ((IPP2P_GNU * 100) + 3);
568+ c++;
569+ }
570+ }
571+ }
572+ return 0;
573+}
574+
575+
576+/*check for KaZaA download commands and other typical data*/
577+int
578+search_all_kazaa (const unsigned char *payload, const u16 plen)
579+{
580+ if ((payload[plen-2] == 0x0d) && (payload[plen-1] == 0x0a))
581+ {
582+
583+ if (memcmp(payload, "GIVE ", 5) == 0) return ((IPP2P_KAZAA * 100) + 1);
584+
585+ if (memcmp(payload, "GET /", 5) == 0) {
586+ u16 c = 8;
587+ const u16 end=plen-22;
588+ while (c < end) {
589+ 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)))
590+ return ((IPP2P_KAZAA * 100) + 2);
591+ c++;
592+ }
593+ }
594+ }
595+ return 0;
596+}
597+
598+/*fast check for edonkey file segment transfer command*/
599+int
600+search_edk (const unsigned char *payload, const u16 plen)
601+{
602+ if (payload[0] != 0xe3)
603+ return 0;
604+ else {
605+ if (payload[5] == 0x47)
606+ return (IPP2P_DATA_EDK * 100);
607+ else
608+ return 0;
609+ }
610+}
611+
612+
613+
614+/*intensive but slower search for some edonkey packets including size-check*/
615+int
616+search_all_edk (const unsigned char *payload, const u16 plen)
617+{
618+ if (payload[0] != 0xe3)
619+ return 0;
620+ else {
621+ //t += head_len;
622+ const u16 cmd = get_u16(payload, 1);
623+ if (cmd == (plen - 5)) {
624+ switch (payload[5]) {
625+ case 0x01: return ((IPP2P_EDK * 100) + 1); /*Client: hello or Server:hello*/
626+ case 0x4c: return ((IPP2P_EDK * 100) + 9); /*Client: Hello-Answer*/
627+ }
628+ }
629+ return 0;
630+ }
631+}
632+
633+
634+/*fast check for Direct Connect send command*/
635+int
636+search_dc (const unsigned char *payload, const u16 plen)
637+{
638+
639+ if (payload[0] != 0x24 )
640+ return 0;
641+ else {
642+ if (memcmp(&payload[1], "Send|", 5) == 0)
643+ return (IPP2P_DATA_DC * 100);
644+ else
645+ return 0;
646+ }
647+
648+}
649+
650+
651+/*intensive but slower check for all direct connect packets*/
652+int
653+search_all_dc (const unsigned char *payload, const u16 plen)
654+{
655+// unsigned char *t = haystack;
656+
657+ if (payload[0] == 0x24 && payload[plen-1] == 0x7c)
658+ {
659+ const unsigned char *t=&payload[1];
660+ /* Client-Hub-Protocol */
661+ if (memcmp(t, "Lock ", 5) == 0) return ((IPP2P_DC * 100) + 1);
662+ /* Client-Client-Protocol, some are already recognized by client-hub (like lock) */
663+ if (memcmp(t, "MyNick ", 7) == 0) return ((IPP2P_DC * 100) + 38);
664+ }
665+ return 0;
666+}
667+
668+/*check for mute*/
669+int
670+search_mute (const unsigned char *payload, const u16 plen)
671+{
672+ if ( plen == 209 || plen == 345 || plen == 473 || plen == 609 || plen == 1121 )
673+ {
674+ //printk(KERN_DEBUG "size hit: %u",size);
675+ if (memcmp(payload,"PublicKey: ",11) == 0 )
676+ {
677+ return ((IPP2P_MUTE * 100) + 0);
678+
679+/* if (memcmp(t+size-14,"\x0aEndPublicKey\x0a",14) == 0)
680+ {
681+ printk(KERN_DEBUG "end pubic key hit: %u",size);
682+
683+ }*/
684+ }
685+ }
686+ return 0;
687+}
688+
689+
690+/* check for xdcc */
691+int
692+search_xdcc (const unsigned char *payload, const u16 plen)
693+{
694+ /* search in small packets only */
695+ if (plen > 20 && plen < 200 && payload[plen-1] == 0x0a && payload[plen-2] == 0x0d && memcmp(payload,"PRIVMSG ",8) == 0)
696+ {
697+
698+ u16 x=10;
699+ const u16 end=plen - 13;
700+
701+ /* is seems to be a irc private massage, chedck for xdcc command */
702+ while (x < end)
703+ {
704+ if (payload[x] == ':')
705+ {
706+ if ( memcmp(&payload[x+1],"xdcc send #",11) == 0 )
707+ return ((IPP2P_XDCC * 100) + 0);
708+ }
709+ x++;
710+ }
711+ }
712+ return 0;
713+}
714+
715+/* search for waste */
716+int search_waste(const unsigned char *payload, const u16 plen)
717+{
718+ if ( plen >= 8 && memcmp(payload,"GET.sha1:",9) == 0)
719+ return ((IPP2P_WASTE * 100) + 0);
720+
721+ return 0;
722+}
723+
724+
725+static struct {
726+ int command;
727+ __u8 short_hand; /*for fucntions included in short hands*/
728+ int packet_len;
729+ int (*function_name) (const unsigned char *, const u16);
730+} matchlist[] = {
731+ {IPP2P_EDK,SHORT_HAND_IPP2P,20, &search_all_edk},
732+// {IPP2P_DATA_KAZAA,SHORT_HAND_DATA,200, &search_kazaa},
733+// {IPP2P_DATA_EDK,SHORT_HAND_DATA,60, &search_edk},
734+// {IPP2P_DATA_DC,SHORT_HAND_DATA,26, &search_dc},
735+ {IPP2P_DC,SHORT_HAND_IPP2P,5, search_all_dc},
736+// {IPP2P_DATA_GNU,SHORT_HAND_DATA,40, &search_gnu},
737+ {IPP2P_GNU,SHORT_HAND_IPP2P,5, &search_all_gnu},
738+ {IPP2P_KAZAA,SHORT_HAND_IPP2P,5, &search_all_kazaa},
739+ {IPP2P_BIT,SHORT_HAND_IPP2P,20, &search_bittorrent},
740+ {IPP2P_APPLE,SHORT_HAND_IPP2P,5, &search_apple},
741+ {IPP2P_SOUL,SHORT_HAND_IPP2P,5, &search_soul},
742+ {IPP2P_WINMX,SHORT_HAND_IPP2P,2, &search_winmx},
743+ {IPP2P_ARES,SHORT_HAND_IPP2P,5, &search_ares},
744+ {IPP2P_MUTE,SHORT_HAND_NONE,200, &search_mute},
745+ {IPP2P_WASTE,SHORT_HAND_NONE,5, &search_waste},
746+ {IPP2P_XDCC,SHORT_HAND_NONE,5, &search_xdcc},
747+ {0,0,0,NULL}
748+};
749+
750+
751+static struct {
752+ int command;
753+ __u8 short_hand; /*for fucntions included in short hands*/
754+ int packet_len;
755+ int (*function_name) (unsigned char *, int);
756+} udp_list[] = {
757+ { IPP2P_KAZAA, SHORT_HAND_IPP2P, 14, &udp_search_kazaa},
758+ { IPP2P_BIT, SHORT_HAND_IPP2P, 23, &udp_search_bit},
759+ { IPP2P_GNU, SHORT_HAND_IPP2P, 11, &udp_search_gnu},
760+ { IPP2P_EDK, SHORT_HAND_IPP2P, 9, &udp_search_edk},
761+ { IPP2P_DC, SHORT_HAND_IPP2P, 12, &udp_search_directconnect},
762+ { 0, 0, 0, NULL }
763+};
764+
765+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0)
766+static int
767+match(const struct sk_buff *skb,
768+ const struct net_device *in,
769+ const struct net_device *out,
770+ const void *matchinfo,
771+ int offset,
772+ const void *hdr,
773+ u_int16_t datalen,
774+ int *hotdrop)
775+#elif LINUX_VERSION_CODE < KERNEL_VERSION(2,6,16)
776+static int
777+match(const struct sk_buff *skb,
778+ const struct net_device *in,
779+ const struct net_device *out,
780+ const void *matchinfo,
781+ int offset,
782+ int *hotdrop)
783+#elif LINUX_VERSION_CODE < KERNEL_VERSION(2,6,17)
784+static int
785+match(const struct sk_buff *skb,
786+ const struct net_device *in,
787+ const struct net_device *out,
788+ const void *matchinfo,
789+ int offset,
790+ unsigned int protoff,
791+ int *hotdrop)
792+#elif LINUX_VERSION_CODE < KERNEL_VERSION(2,6,23)
793+static int
794+match(const struct sk_buff *skb,
795+ const struct net_device *in,
796+ const struct net_device *out,
797+ const struct xt_match *match,
798+ const void *matchinfo,
799+ int offset,
800+ unsigned int protoff,
801+ int *hotdrop)
802+#elif LINUX_VERSION_CODE < KERNEL_VERSION(2,6,28)
803+static bool
804+match(const struct sk_buff *skb,
805+ const struct net_device *in,
806+ const struct net_device *out,
807+ const struct xt_match *match,
808+ const void *matchinfo,
809+ int offset,
810+ unsigned int protoff,
811+ bool *hotdrop)
812+#elif LINUX_VERSION_CODE < KERNEL_VERSION(2,6,35)
813+static bool
814+match(const struct sk_buff *skb,
815+ const struct xt_match_param *par)
816+#else /* LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35) */
817+static int
818+match(const struct sk_buff *skb,
819+ struct xt_action_param *par)
820+#endif
821+{
822+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,28)
823+ const struct ipt_p2p_info *info = matchinfo;
824+#else
825+ const struct ipt_p2p_info *info = par->matchinfo;
826+ const int offset = par->fragoff;
827+#endif
828+ unsigned char *haystack;
829+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,22)
830+ struct iphdr *ip = ip_hdr(skb);
831+#else
832+ struct iphdr *ip = skb->nh.iph;
833+#endif
834+ int p2p_result = 0, i = 0;
835+// int head_len;
836+ int hlen = ntohs(ip->tot_len)-(ip->ihl*4); /*hlen = packet-data length*/
837+
838+ /*must not be a fragment*/
839+ if (offset) {
840+ if (info->debug) printk("IPP2P.match: offset found %i \n",offset);
841+ return 0;
842+ }
843+
844+ /*make sure that skb is linear*/
845+ if(skb_is_nonlinear(skb)){
846+ if (info->debug) printk("IPP2P.match: nonlinear skb found\n");
847+ return 0;
848+ }
849+
850+
851+ haystack=(char *)ip+(ip->ihl*4); /*haystack = packet data*/
852+
853+ switch (ip->protocol){
854+ case IPPROTO_TCP: /*what to do with a TCP packet*/
855+ {
856+ struct tcphdr *tcph = (void *) ip + ip->ihl * 4;
857+
858+ if (tcph->fin) return 0; /*if FIN bit is set bail out*/
859+ if (tcph->syn) return 0; /*if SYN bit is set bail out*/
860+ if (tcph->rst) return 0; /*if RST bit is set bail out*/
861+
862+ haystack += tcph->doff * 4; /*get TCP-Header-Size*/
863+ hlen -= tcph->doff * 4;
864+ while (matchlist[i].command) {
865+ if ((((info->cmd & matchlist[i].command) == matchlist[i].command) ||
866+ ((info->cmd & matchlist[i].short_hand) == matchlist[i].short_hand)) &&
867+ (hlen > matchlist[i].packet_len)) {
868+ p2p_result = matchlist[i].function_name(haystack, hlen);
869+ if (p2p_result)
870+ {
871+ if (info->debug) printk("IPP2P.debug:TCP-match: %i from: %pl4:%i to: %pl4:%i Length: %i\n",
872+ p2p_result, &ip->saddr,ntohs(tcph->source), &ip->daddr,ntohs(tcph->dest),hlen);
873+ return p2p_result;
874+ }
875+ }
876+ i++;
877+ }
878+ return p2p_result;
879+ }
880+
881+ case IPPROTO_UDP: /*what to do with an UDP packet*/
882+ {
883+ struct udphdr *udph = (void *) ip + ip->ihl * 4;
884+
885+ while (udp_list[i].command){
886+ if ((((info->cmd & udp_list[i].command) == udp_list[i].command) ||
887+ ((info->cmd & udp_list[i].short_hand) == udp_list[i].short_hand)) &&
888+ (hlen > udp_list[i].packet_len)) {
889+ p2p_result = udp_list[i].function_name(haystack, hlen);
890+ if (p2p_result){
891+ if (info->debug) printk("IPP2P.debug:UDP-match: %i from: %pl4:%i to: %pl4:%i Length: %i\n",
892+ p2p_result, &ip->saddr,ntohs(udph->source), &ip->daddr,ntohs(udph->dest),hlen);
893+ return p2p_result;
894+ }
895+ }
896+ i++;
897+ }
898+ return p2p_result;
899+ }
900+
901+ default: return 0;
902+ }
903+}
904+
905+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,16)
906+static int
907+checkentry(const char *tablename,
908+ const struct ipt_ip *ip,
909+ void *matchinfo,
910+ unsigned int matchsize,
911+ unsigned int hook_mask)
912+#elif LINUX_VERSION_CODE < KERNEL_VERSION(2,6,17)
913+static int
914+checkentry(const char *tablename,
915+ const void *inf,
916+ void *matchinfo,
917+ unsigned int matchsize,
918+ unsigned int hook_mask)
919+#elif LINUX_VERSION_CODE < KERNEL_VERSION(2,6,19)
920+static int
921+checkentry(const char *tablename,
922+ const void *inf,
923+ const struct xt_match *match,
924+ void *matchinfo,
925+ unsigned int matchsize,
926+ unsigned int hook_mask)
927+#elif LINUX_VERSION_CODE < KERNEL_VERSION(2,6,23)
928+static int
929+checkentry(const char *tablename,
930+ const void *inf,
931+ const struct xt_match *match,
932+ void *matchinfo,
933+ unsigned int hook_mask)
934+#elif LINUX_VERSION_CODE < KERNEL_VERSION(2,6,28)
935+static bool
936+checkentry(const char *tablename,
937+ const void *inf,
938+ const struct xt_match *match,
939+ void *matchinfo,
940+ unsigned int hook_mask)
941+#elif LINUX_VERSION_CODE < KERNEL_VERSION(2,6,35)
942+static bool
943+checkentry(const struct xt_mtchk_param *par)
944+#else /* LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35) */
945+static int
946+checkentry(const struct xt_mtchk_param *par)
947+#endif
948+{
949+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,35)
950+ return 1;
951+#else
952+ return 0;
953+#endif
954+}
955+
956+
957+
958+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,21)
959+static struct xt_match ipp2p_match = {
960+#else
961+static struct ipt_match ipp2p_match = {
962+#endif
963+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0)
964+ { NULL, NULL },
965+ "ipp2p",
966+ &ipp2p_match,
967+ &ipp2p_checkentry,
968+ NULL,
969+ THIS_MODULE
970+#endif
971+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
972+ .name = "ipp2p",
973+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,21)
974+ .family = AF_INET,
975+#endif
976+ .match = &match,
977+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,17)
978+ .matchsize = sizeof(struct ipt_p2p_info),
979+#endif
980+ .checkentry = &checkentry,
981+ .me = THIS_MODULE,
982+#endif
983+};
984+
985+
986+static int __init init(void)
987+{
988+ printk(KERN_INFO "IPP2P v%s loading\n", IPP2P_VERSION);
989+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,21)
990+ return xt_register_match(&ipp2p_match);
991+#else
992+ return ipt_register_match(&ipp2p_match);
993+#endif
994+}
995+
996+static void __exit fini(void)
997+{
998+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,21)
999+ xt_unregister_match(&ipp2p_match);
1000+#else
1001+ ipt_unregister_match(&ipp2p_match);
1002+#endif
1003+ printk(KERN_INFO "IPP2P v%s unloaded\n", IPP2P_VERSION);
1004+}
1005+
1006+module_init(init);
1007+module_exit(fini);
1008+
1009+
1010diff -Naur linux-3.0.24.org/net/ipv4/netfilter/Kconfig linux-3.0.24/net/ipv4/netfilter/Kconfig
1011--- linux-3.0.24.org/net/ipv4/netfilter/Kconfig 2012-03-12 18:58:19.000000000 +0100
1012+++ linux-3.0.24/net/ipv4/netfilter/Kconfig 2012-03-20 09:05:15.827477622 +0100
1013@@ -379,5 +379,15 @@
1014
1015 endif # IP_NF_ARPTABLES
1016
1017+config IP_NF_MATCH_IPP2P
1018+ tristate 'IPP2P match support'
1019+ depends on IP_NF_IPTABLES
1020+ help
1021+ This option makes possible to match some P2P packets
1022+ therefore helps controlling such traffic.
1023+
1024+ If you want to compile it as a module, say M here and read
1025+ <file:Documentation/modules.txt>. If unsure, say `N'.
1026+
1027 endmenu
1028
1029diff -Naur linux-3.0.24.org/net/ipv4/netfilter/Makefile linux-3.0.24/net/ipv4/netfilter/Makefile
1030--- linux-3.0.24.org/net/ipv4/netfilter/Makefile 2012-03-12 18:58:19.000000000 +0100
1031+++ linux-3.0.24/net/ipv4/netfilter/Makefile 2012-03-20 09:13:38.960288878 +0100
1032@@ -50,6 +50,7 @@
1033 # matches
1034 obj-$(CONFIG_IP_NF_MATCH_AH) += ipt_ah.o
1035 obj-$(CONFIG_IP_NF_MATCH_ECN) += ipt_ecn.o
1036+obj-$(CONFIG_IP_NF_MATCH_IPP2P) += ipt_ipp2p.o
1037
1038 # targets
1039 obj-$(CONFIG_IP_NF_TARGET_CLUSTERIP) += ipt_CLUSTERIP.o
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