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ipp2p: import 20080304 code base

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This commit is contained in:
Jan Engelhardt
2008-03-26 05:44:50 +01:00
parent 20f6e47525
commit 44d6f47ad6
8 changed files with 1385 additions and 0 deletions
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1
extensions/Kbuild
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@@ -13,6 +13,7 @@ obj-${build_TARPIT} += xt_TARPIT.o
obj-${build_TEE} += xt_TEE.o
obj-${build_condition} += xt_condition.o
obj-${build_geoip} += xt_geoip.o
obj-${build_ipp2p} += xt_ipp2p.o
obj-${build_portscan} += xt_portscan.o
-include ${M}/*.Kbuild

1
extensions/Mbuild
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@@ -6,4 +6,5 @@ obj-${build_TARPIT} += libxt_TARPIT.so
obj-${build_TEE} += libxt_TEE.so
obj-${build_condition} += libxt_condition.so
obj-${build_geoip} += libxt_geoip.so
obj-${build_ipp2p} += libxt_ipp2p.so
obj-${build_portscan} += libxt_portscan.so

397
extensions/libxt_ipp2p.c Normal file
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@@ -0,0 +1,397 @@
#include <stdio.h>
#include <netdb.h>
#include <string.h>
#include <stdlib.h>
#include <getopt.h>
#include <ctype.h>
#include <xtables.h>
#include "xt_ipp2p.h"
static void
help(void)
{
printf(
"IPP2P v%s options:\n"
" --ipp2p Grab all known p2p packets\n"
" --edk [TCP&UDP] All known eDonkey/eMule/Overnet packets\n"
" --dc [TCP] All known Direct Connect packets\n"
" --kazaa [TCP&UDP] All known KaZaA packets\n"
" --gnu [TCP&UDP] All known Gnutella packets\n"
" --bit [TCP&UDP] All known BitTorrent packets\n"
" --apple [TCP] All known AppleJuice packets\n"
" --winmx [TCP] All known WinMX\n"
" --soul [TCP] All known SoulSeek\n"
" --ares [TCP] All known Ares\n\n"
" EXPERIMENTAL protocols (please send feedback to: ipp2p@ipp2p.org) :\n"
" --mute [TCP] All known Mute packets\n"
" --waste [TCP] All known Waste packets\n"
" --xdcc [TCP] All known XDCC packets (only xdcc login)\n\n"
" DEBUG SUPPPORT, use only if you know why\n"
" --debug Generate kernel debug output, THIS WILL SLOW DOWN THE FILTER\n"
"\nNote that the follwing options will have the same meaning:\n"
" '--ipp2p' is equal to '--edk --dc --kazaa --gnu --bit --apple --winmx --soul --ares'\n"
"\nIPP2P was intended for TCP only. Due to increasing usage of UDP we needed to change this.\n"
"You can now use -p udp to search UDP packets only or without -p switch to search UDP and TCP packets.\n"
"\nSee README included with this package for more details or visit http://www.ipp2p.org\n"
"\nExamples:\n"
" iptables -A FORWARD -m ipp2p --ipp2p -j MARK --set-mark 0x01\n"
" iptables -A FORWARD -p udp -m ipp2p --kazaa --bit -j DROP\n"
" iptables -A FORWARD -p tcp -m ipp2p --edk --soul -j DROP\n\n"
, IPP2P_VERSION);
}
static struct option opts[] = {
{ "ipp2p", 0, 0, '1' },
{ "edk", 0, 0, '2' },
{ "dc", 0, 0, '7' },
{ "gnu", 0, 0, '9' },
{ "kazaa", 0, 0, 'a' },
{ "bit", 0, 0, 'b' },
{ "apple", 0, 0, 'c' },
{ "soul", 0, 0, 'd' },
{ "winmx", 0, 0, 'e' },
{ "ares", 0, 0, 'f' },
{ "mute", 0, 0, 'g' },
{ "waste", 0, 0, 'h' },
{ "xdcc", 0, 0, 'i' },
{ "debug", 0, 0, 'j' },
{0}
};
static void
init(struct xt_entry_match *m)
{
struct ipt_p2p_info *info = (struct ipt_p2p_info *)m->data;
/*init the module with default values*/
info->cmd = 0;
info->debug = 0;
}
static int
parse(int c, char **argv, int invert, unsigned int *flags,
const void *entry,
struct xt_entry_match **match)
{
struct ipt_p2p_info *info = (struct ipt_p2p_info *)(*match)->data;
switch (c) {
case '1': /*cmd: ipp2p*/
if ((*flags & SHORT_HAND_IPP2P) == SHORT_HAND_IPP2P)
exit_error(PARAMETER_PROBLEM,
"ipp2p: `--ipp2p' may only be "
"specified once!");
/* if ((*flags & SHORT_HAND_DATA) == SHORT_HAND_DATA)
exit_error(PARAMETER_PROBLEM,
"ipp2p: `--ipp2p-data' may only be "
"specified alone!");*/
if ((*flags) != 0)
exit_error(PARAMETER_PROBLEM,
"ipp2p: `--ipp2p' may only be "
"specified alone!");
if (invert) exit_error(PARAMETER_PROBLEM, "ipp2p: invert [!] is not allowed!");
*flags += SHORT_HAND_IPP2P;
info->cmd = *flags;
break;
case '2': /*cmd: edk*/
if ((*flags & IPP2P_EDK) == IPP2P_EDK)
exit_error(PARAMETER_PROBLEM,
"ipp2p: `--edk' may only be "
"specified once");
if ((*flags & SHORT_HAND_IPP2P) == SHORT_HAND_IPP2P)
exit_error(PARAMETER_PROBLEM,
"ipp2p: `--ipp2p' may only be "
"specified alone!");
/* if ((*flags & SHORT_HAND_DATA) == SHORT_HAND_DATA)
exit_error(PARAMETER_PROBLEM,
"ipp2p: `--ipp2p-data' may only be "
"specified alone!");*/
if ((*flags & IPP2P_DATA_EDK) == IPP2P_DATA_EDK)
exit_error(PARAMETER_PROBLEM,
"ipp2p: use `--edk' OR `--edk-data' but not both of them!");
if (invert) exit_error(PARAMETER_PROBLEM, "ipp2p: invert [!] is not allowed!");
*flags += IPP2P_EDK;
info->cmd = *flags;
break;
case '7': /*cmd: dc*/
if ((*flags & IPP2P_DC) == IPP2P_DC)
exit_error(PARAMETER_PROBLEM,
"ipp2p: `--dc' may only be "
"specified once!");
if ((*flags & SHORT_HAND_IPP2P) == SHORT_HAND_IPP2P)
exit_error(PARAMETER_PROBLEM,
"ipp2p: `--ipp2p' may only be "
"specified alone!");
/* if ((*flags & SHORT_HAND_DATA) == SHORT_HAND_DATA)
exit_error(PARAMETER_PROBLEM,
"ipp2p: `--ipp2p-data' may only be "
"specified alone!");*/
if ((*flags & IPP2P_DATA_DC) == IPP2P_DATA_DC)
exit_error(PARAMETER_PROBLEM,
"ipp2p: use `--dc' OR `--dc-data' but not both of them!");
if (invert) exit_error(PARAMETER_PROBLEM, "ipp2p: invert [!] is not allowed!");
*flags += IPP2P_DC;
info->cmd = *flags;
break;
case '9': /*cmd: gnu*/
if ((*flags & IPP2P_GNU) == IPP2P_GNU)
exit_error(PARAMETER_PROBLEM,
"ipp2p: `--gnu' may only be "
"specified once!");
/* if ((*flags & SHORT_HAND_DATA) == SHORT_HAND_DATA)
exit_error(PARAMETER_PROBLEM,
"ipp2p: `--ipp2p-data' may only be "
"specified alone!");*/
if ((*flags & SHORT_HAND_IPP2P) == SHORT_HAND_IPP2P)
exit_error(PARAMETER_PROBLEM,
"ipp2p: `--ipp2p' may only be "
"specified alone!");
if ((*flags & IPP2P_DATA_GNU) == IPP2P_DATA_GNU)
exit_error(PARAMETER_PROBLEM,
"ipp2p: use `--gnu' OR `--gnu-data' but not both of them!");
if (invert) exit_error(PARAMETER_PROBLEM, "ipp2p: invert [!] is not allowed!");
*flags += IPP2P_GNU;
info->cmd = *flags;
break;
case 'a': /*cmd: kazaa*/
if ((*flags & IPP2P_KAZAA) == IPP2P_KAZAA)
exit_error(PARAMETER_PROBLEM,
"ipp2p: `--kazaa' may only be "
"specified once!");
/* if ((*flags & SHORT_HAND_DATA) == SHORT_HAND_DATA)
exit_error(PARAMETER_PROBLEM,
"ipp2p: `--ipp2p-data' may only be "
"specified alone!");*/
if ((*flags & SHORT_HAND_IPP2P) == SHORT_HAND_IPP2P)
exit_error(PARAMETER_PROBLEM,
"ipp2p: `--ipp2p' may only be "
"specified alone!");
if ((*flags & IPP2P_DATA_KAZAA) == IPP2P_DATA_KAZAA)
exit_error(PARAMETER_PROBLEM,
"ipp2p: use `--kazaa' OR `--kazaa-data' but not both of them!");
if (invert) exit_error(PARAMETER_PROBLEM, "ipp2p: invert [!] is not allowed!");
*flags += IPP2P_KAZAA;
info->cmd = *flags;
break;
case 'b': /*cmd: bit*/
if ((*flags & IPP2P_BIT) == IPP2P_BIT)
exit_error(PARAMETER_PROBLEM,
"ipp2p: `--bit' may only be "
"specified once!");
if ((*flags & SHORT_HAND_IPP2P) == SHORT_HAND_IPP2P)
exit_error(PARAMETER_PROBLEM,
"ipp2p: `--ipp2p' may only be "
"specified alone!");
if (invert) exit_error(PARAMETER_PROBLEM, "ipp2p: invert [!] is not allowed!");
*flags += IPP2P_BIT;
info->cmd = *flags;
break;
case 'c': /*cmd: apple*/
if ((*flags & IPP2P_APPLE) == IPP2P_APPLE)
exit_error(PARAMETER_PROBLEM,
"ipp2p: `--apple' may only be "
"specified once!");
if ((*flags & SHORT_HAND_IPP2P) == SHORT_HAND_IPP2P)
exit_error(PARAMETER_PROBLEM,
"ipp2p: `--ipp2p' may only be "
"specified alone!");
if (invert) exit_error(PARAMETER_PROBLEM, "ipp2p: invert [!] is not allowed!");
*flags += IPP2P_APPLE;
info->cmd = *flags;
break;
case 'd': /*cmd: soul*/
if ((*flags & IPP2P_SOUL) == IPP2P_SOUL)
exit_error(PARAMETER_PROBLEM,
"ipp2p: `--soul' may only be "
"specified once!");
if ((*flags & SHORT_HAND_IPP2P) == SHORT_HAND_IPP2P)
exit_error(PARAMETER_PROBLEM,
"ipp2p: `--ipp2p' may only be "
"specified alone!");
if (invert) exit_error(PARAMETER_PROBLEM, "ipp2p: invert [!] is not allowed!");
*flags += IPP2P_SOUL;
info->cmd = *flags;
break;
case 'e': /*cmd: winmx*/
if ((*flags & IPP2P_WINMX) == IPP2P_WINMX)
exit_error(PARAMETER_PROBLEM,
"ipp2p: `--winmx' may only be "
"specified once!");
if ((*flags & SHORT_HAND_IPP2P) == SHORT_HAND_IPP2P)
exit_error(PARAMETER_PROBLEM,
"ipp2p: `--ipp2p' may only be "
"specified alone!");
if (invert) exit_error(PARAMETER_PROBLEM, "ipp2p: invert [!] is not allowed!");
*flags += IPP2P_WINMX;
info->cmd = *flags;
break;
case 'f': /*cmd: ares*/
if ((*flags & IPP2P_ARES) == IPP2P_ARES)
exit_error(PARAMETER_PROBLEM,
"ipp2p: `--ares' may only be "
"specified once!");
if ((*flags & SHORT_HAND_IPP2P) == SHORT_HAND_IPP2P)
exit_error(PARAMETER_PROBLEM,
"ipp2p: `--ipp2p' may only be "
"specified alone!");
if (invert) exit_error(PARAMETER_PROBLEM, "ipp2p: invert [!] is not allowed!");
*flags += IPP2P_ARES;
info->cmd = *flags;
break;
case 'g': /*cmd: mute*/
if ((*flags & IPP2P_MUTE) == IPP2P_MUTE)
exit_error(PARAMETER_PROBLEM,
"ipp2p: `--mute' may only be "
"specified once!");
if (invert) exit_error(PARAMETER_PROBLEM, "ipp2p: invert [!] is not allowed!");
*flags += IPP2P_MUTE;
info->cmd = *flags;
break;
case 'h': /*cmd: waste*/
if ((*flags & IPP2P_WASTE) == IPP2P_WASTE)
exit_error(PARAMETER_PROBLEM,
"ipp2p: `--waste' may only be "
"specified once!");
if (invert) exit_error(PARAMETER_PROBLEM, "ipp2p: invert [!] is not allowed!");
*flags += IPP2P_WASTE;
info->cmd = *flags;
break;
case 'i': /*cmd: xdcc*/
if ((*flags & IPP2P_XDCC) == IPP2P_XDCC)
exit_error(PARAMETER_PROBLEM,
"ipp2p: `--ares' may only be "
"specified once!");
if (invert) exit_error(PARAMETER_PROBLEM, "ipp2p: invert [!] is not allowed!");
*flags += IPP2P_XDCC;
info->cmd = *flags;
break;
case 'j': /*cmd: debug*/
if (invert) exit_error(PARAMETER_PROBLEM, "ipp2p: invert [!] is not allowed!");
info->debug = 1;
break;
default:
// exit_error(PARAMETER_PROBLEM,
// "\nipp2p-parameter problem: for ipp2p usage type: iptables -m ipp2p --help\n");
return 0;
}
return 1;
}
static void
final_check(unsigned int flags)
{
if (!flags)
exit_error(PARAMETER_PROBLEM,
"\nipp2p-parameter problem: for ipp2p usage type: iptables -m ipp2p --help\n");
}
static void
print(const void *ip,
const struct xt_entry_match *match,
int numeric)
{
struct ipt_p2p_info *info = (struct ipt_p2p_info *)match->data;
printf("ipp2p v%s", IPP2P_VERSION);
if ((info->cmd & SHORT_HAND_IPP2P) == SHORT_HAND_IPP2P) printf(" --ipp2p");
// if ((info->cmd & SHORT_HAND_DATA) == SHORT_HAND_DATA) printf(" --ipp2p-data");
if ((info->cmd & IPP2P_KAZAA) == IPP2P_KAZAA) printf(" --kazaa");
// if ((info->cmd & IPP2P_DATA_KAZAA) == IPP2P_DATA_KAZAA) printf(" --kazaa-data");
// if ((info->cmd & IPP2P_DATA_GNU) == IPP2P_DATA_GNU) printf(" --gnu-data");
if ((info->cmd & IPP2P_GNU) == IPP2P_GNU) printf(" --gnu");
if ((info->cmd & IPP2P_EDK) == IPP2P_EDK) printf(" --edk");
// if ((info->cmd & IPP2P_DATA_EDK) == IPP2P_DATA_EDK) printf(" --edk-data");
// if ((info->cmd & IPP2P_DATA_DC) == IPP2P_DATA_DC) printf(" --dc-data");
if ((info->cmd & IPP2P_DC) == IPP2P_DC) printf(" --dc");
if ((info->cmd & IPP2P_BIT) == IPP2P_BIT) printf(" --bit");
if ((info->cmd & IPP2P_APPLE) == IPP2P_APPLE) printf(" --apple");
if ((info->cmd & IPP2P_SOUL) == IPP2P_SOUL) printf(" --soul");
if ((info->cmd & IPP2P_WINMX) == IPP2P_WINMX) printf(" --winmx");
if ((info->cmd & IPP2P_ARES) == IPP2P_ARES) printf(" --ares");
if ((info->cmd & IPP2P_MUTE) == IPP2P_MUTE) printf(" --mute");
if ((info->cmd & IPP2P_WASTE) == IPP2P_WASTE) printf(" --waste");
if ((info->cmd & IPP2P_XDCC) == IPP2P_XDCC) printf(" --xdcc");
if (info->debug != 0) printf(" --debug");
printf(" ");
}
static void
save(const void *ip, const struct xt_entry_match *match)
{
struct ipt_p2p_info *info = (struct ipt_p2p_info *)match->data;
if ((info->cmd & SHORT_HAND_IPP2P) == SHORT_HAND_IPP2P) printf("--ipp2p ");
// if ((info->cmd & SHORT_HAND_DATA) == SHORT_HAND_DATA) printf("--ipp2p-data ");
if ((info->cmd & IPP2P_KAZAA) == IPP2P_KAZAA) printf("--kazaa ");
// if ((info->cmd & IPP2P_DATA_KAZAA) == IPP2P_DATA_KAZAA) printf("--kazaa-data ");
// if ((info->cmd & IPP2P_DATA_GNU) == IPP2P_DATA_GNU) printf("--gnu-data ");
if ((info->cmd & IPP2P_GNU) == IPP2P_GNU) printf("--gnu ");
if ((info->cmd & IPP2P_EDK) == IPP2P_EDK) printf("--edk ");
// if ((info->cmd & IPP2P_DATA_EDK) == IPP2P_DATA_EDK) printf("--edk-data ");
// if ((info->cmd & IPP2P_DATA_DC) == IPP2P_DATA_DC) printf("--dc-data ");
if ((info->cmd & IPP2P_DC) == IPP2P_DC) printf("--dc ");
if ((info->cmd & IPP2P_BIT) == IPP2P_BIT) printf("--bit ");
if ((info->cmd & IPP2P_APPLE) == IPP2P_APPLE) printf("--apple ");
if ((info->cmd & IPP2P_SOUL) == IPP2P_SOUL) printf("--soul ");
if ((info->cmd & IPP2P_WINMX) == IPP2P_WINMX) printf("--winmx ");
if ((info->cmd & IPP2P_ARES) == IPP2P_ARES) printf("--ares ");
if ((info->cmd & IPP2P_MUTE) == IPP2P_MUTE) printf(" --mute");
if ((info->cmd & IPP2P_WASTE) == IPP2P_WASTE) printf(" --waste");
if ((info->cmd & IPP2P_XDCC) == IPP2P_XDCC) printf(" --xdcc");
if (info->debug != 0) printf("--debug ");
}
static
struct xtables_match ipp2p=
{
.next = NULL,
.name = "ipp2p",
.version = XTABLES_VERSION,
.size = XT_ALIGN(sizeof(struct ipt_p2p_info)),
.userspacesize = XT_ALIGN(sizeof(struct ipt_p2p_info)),
.help = &help,
.init = &init,
.parse = &parse,
.final_check = &final_check,
.print = &print,
.save = &save,
.extra_opts = opts
};
void _init(void)
{
xtables_register_match(&ipp2p);
}

43
extensions/libxt_ipp2p.man Normal file
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@@ -0,0 +1,43 @@
This module matches certain packets in P2P flows. It is not
designed to match all packets belonging to a P2P connection -
use IPP2P together with CONNMARK for this purpose. Also visit
http://www.ipp2p.org for detailed information.
Use it together with -p tcp or -p udp to search these protocols
only or without -p switch to search packets of both protocols.
IPP2P provides the following options:
.TP
.B "--edk "
Matches as many eDonkey/eMule packets as possible.
.TP
.B "--kazaa "
Matches as many KaZaA packets as possible.
.TP
.B "--gnu "
Matches as many Gnutella packets as possible.
.TP
.B "--dc "
Matches as many Direct Connect packets as possible.
.TP
.B "--bit "
Matches BitTorrent packets.
.TP
.B "--apple "
Matches AppleJuice packets.
.TP
.B "--soul "
Matches some SoulSeek packets. Considered as beta, use careful!
.TP
.B "--winmx "
Matches some WinMX packets. Considered as beta, use careful!
.TP
.B "--ares "
Matches Ares and AresLite packets. Use together with -j DROP only.
.TP
.B "--ipp2p "
Short hand for: --edk --kazaa --gnu --dc
.TP
.B "--debug "
Prints some information about each hit into kernel logfile. May
produce huge logfiles so beware!

6
extensions/xt_ipp2p.Kconfig Normal file
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@@ -0,0 +1,6 @@
config NETFILTER_XT_MATCH_IPP2P
tristate '"ipp2p" match support'
depends on NETFILTER_XTABLES && NETFILTER_ADVANCED
---help---
This option makes possible to match some P2P packets
therefore helps controlling such traffic.

905
extensions/xt_ipp2p.c Normal file
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@@ -0,0 +1,905 @@
#if defined(MODVERSIONS)
#include <linux/modversions.h>
#endif
#include <linux/module.h>
#include <linux/version.h>
#include <linux/netfilter_ipv4/ip_tables.h>
#include <net/tcp.h>
#include <net/udp.h>
#include "xt_ipp2p.h"
#include "compat_xtables.h"
#define get_u8(X,O) (*(__u8 *)(X + O))
#define get_u16(X,O) (*(__u16 *)(X + O))
#define get_u32(X,O) (*(__u32 *)(X + O))
MODULE_AUTHOR("Eicke Friedrich/Klaus Degner <ipp2p@ipp2p.org>");
MODULE_DESCRIPTION("An extension to iptables to identify P2P traffic.");
MODULE_LICENSE("GPL");
/*Search for UDP eDonkey/eMule/Kad commands*/
int
udp_search_edk (unsigned char *haystack, int packet_len)
{
unsigned char *t = haystack;
t += 8;
switch (t[0]) {
case 0xe3:
{ /*edonkey*/
switch (t[1])
{
/* client -> server status request */
case 0x96:
if (packet_len == 14) return ((IPP2P_EDK * 100) + 50);
break;
/* server -> client status request */
case 0x97: if (packet_len == 42) return ((IPP2P_EDK * 100) + 51);
break;
/* server description request */
/* e3 2a ff f0 .. | size == 6 */
case 0xa2: if ( (packet_len == 14) && ( get_u16(t,2) == __constant_htons(0xfff0) ) ) return ((IPP2P_EDK * 100) + 52);
break;
/* server description response */
/* e3 a3 ff f0 .. | size > 40 && size < 200 */
//case 0xa3: return ((IPP2P_EDK * 100) + 53);
// break;
case 0x9a: if (packet_len==26) return ((IPP2P_EDK * 100) + 54);
break;
case 0x92: if (packet_len==18) return ((IPP2P_EDK * 100) + 55);
break;
}
break;
}
case 0xe4:
{
switch (t[1])
{
/* e4 20 .. | size == 43 */
case 0x20: if ((packet_len == 43) && (t[2] != 0x00) && (t[34] != 0x00)) return ((IPP2P_EDK * 100) + 60);
break;
/* e4 00 .. 00 | size == 35 ? */
case 0x00: if ((packet_len == 35) && (t[26] == 0x00)) return ((IPP2P_EDK * 100) + 61);
break;
/* e4 10 .. 00 | size == 35 ? */
case 0x10: if ((packet_len == 35) && (t[26] == 0x00)) return ((IPP2P_EDK * 100) + 62);
break;
/* e4 18 .. 00 | size == 35 ? */
case 0x18: if ((packet_len == 35) && (t[26] == 0x00)) return ((IPP2P_EDK * 100) + 63);
break;
/* e4 52 .. | size = 44 */
case 0x52: if (packet_len == 44 ) return ((IPP2P_EDK * 100) + 64);
break;
/* e4 58 .. | size == 6 */
case 0x58: if (packet_len == 14 ) return ((IPP2P_EDK * 100) + 65);
break;
/* e4 59 .. | size == 2 */
case 0x59: if (packet_len == 10 )return ((IPP2P_EDK * 100) + 66);
break;
/* e4 28 .. | packet_len == 52,77,102,127... */
case 0x28: if (((packet_len-52) % 25) == 0) return ((IPP2P_EDK * 100) + 67);
break;
/* e4 50 xx xx | size == 4 */
case 0x50: if (packet_len == 12) return ((IPP2P_EDK * 100) + 68);
break;
/* e4 40 xx xx | size == 48 */
case 0x40: if (packet_len == 56) return ((IPP2P_EDK * 100) + 69);
break;
}
break;
}
} /* end of switch (t[0]) */
return 0;
}/*udp_search_edk*/
/*Search for UDP Gnutella commands*/
int
udp_search_gnu (unsigned char *haystack, int packet_len)
{
unsigned char *t = haystack;
t += 8;
if (memcmp(t, "GND", 3) == 0) return ((IPP2P_GNU * 100) + 51);
if (memcmp(t, "GNUTELLA ", 9) == 0) return ((IPP2P_GNU * 100) + 52);
return 0;
}/*udp_search_gnu*/
/*Search for UDP KaZaA commands*/
int
udp_search_kazaa (unsigned char *haystack, int packet_len)
{
unsigned char *t = haystack;
if (t[packet_len-1] == 0x00){
t += (packet_len - 6);
if (memcmp(t, "KaZaA", 5) == 0) return (IPP2P_KAZAA * 100 +50);
}
return 0;
}/*udp_search_kazaa*/
/*Search for UDP DirectConnect commands*/
int
udp_search_directconnect (unsigned char *haystack, int packet_len)
{
unsigned char *t = haystack;
if ((*(t + 8) == 0x24) && (*(t + packet_len - 1) == 0x7c)) {
t+=8;
if (memcmp(t, "SR ", 3) == 0) return ((IPP2P_DC * 100) + 60);
if (memcmp(t, "Ping ", 5) == 0) return ((IPP2P_DC * 100) + 61);
}
return 0;
}/*udp_search_directconnect*/
/*Search for UDP BitTorrent commands*/
int
udp_search_bit (unsigned char *haystack, int packet_len)
{
switch(packet_len)
{
case 24:
/* ^ 00 00 04 17 27 10 19 80 */
if ((ntohl(get_u32(haystack, 8)) == 0x00000417) && (ntohl(get_u32(haystack, 12)) == 0x27101980))
return (IPP2P_BIT * 100 + 50);
break;
case 44:
if (get_u32(haystack, 16) == __constant_htonl(0x00000400) && get_u32(haystack, 36) == __constant_htonl(0x00000104))
return (IPP2P_BIT * 100 + 51);
if (get_u32(haystack, 16) == __constant_htonl(0x00000400))
return (IPP2P_BIT * 100 + 61);
break;
case 65:
if (get_u32(haystack, 16) == __constant_htonl(0x00000404) && get_u32(haystack, 36) == __constant_htonl(0x00000104))
return (IPP2P_BIT * 100 + 52);
if (get_u32(haystack, 16) == __constant_htonl(0x00000404))
return (IPP2P_BIT * 100 + 62);
break;
case 67:
if (get_u32(haystack, 16) == __constant_htonl(0x00000406) && get_u32(haystack, 36) == __constant_htonl(0x00000104))
return (IPP2P_BIT * 100 + 53);
if (get_u32(haystack, 16) == __constant_htonl(0x00000406))
return (IPP2P_BIT * 100 + 63);
break;
case 211:
if (get_u32(haystack, 8) == __constant_htonl(0x00000405))
return (IPP2P_BIT * 100 + 54);
break;
case 29:
if ((get_u32(haystack, 8) == __constant_htonl(0x00000401)))
return (IPP2P_BIT * 100 + 55);
break;
case 52:
if (get_u32(haystack,8) == __constant_htonl(0x00000827) &&
get_u32(haystack,12) == __constant_htonl(0x37502950))
return (IPP2P_BIT * 100 + 80);
break;
default:
/* this packet does not have a constant size */
if (packet_len >= 40 && get_u32(haystack, 16) == __constant_htonl(0x00000402) && get_u32(haystack, 36) == __constant_htonl(0x00000104))
return (IPP2P_BIT * 100 + 56);
break;
}
/* some extra-bitcomet rules:
* "d1:" [a|r] "d2:id20:"
*/
if (packet_len > 30 && get_u8(haystack, 8) == 'd' && get_u8(haystack, 9) == '1' && get_u8(haystack, 10) == ':' )
{
if (get_u8(haystack, 11) == 'a' || get_u8(haystack, 11) == 'r')
{
if (memcmp(haystack+12,"d2:id20:",8)==0)
return (IPP2P_BIT * 100 + 57);
}
}
#if 0
/* bitlord rules */
/* packetlen must be bigger than 40 */
/* first 4 bytes are zero */
if (packet_len > 40 && get_u32(haystack, 8) == 0x00000000)
{
/* first rule: 00 00 00 00 01 00 00 xx xx xx xx 00 00 00 00*/
if (get_u32(haystack, 12) == 0x00000000 &&
get_u32(haystack, 16) == 0x00010000 &&
get_u32(haystack, 24) == 0x00000000 )
return (IPP2P_BIT * 100 + 71);
/* 00 01 00 00 0d 00 00 xx xx xx xx 00 00 00 00*/
if (get_u32(haystack, 12) == 0x00000001 &&
get_u32(haystack, 16) == 0x000d0000 &&
get_u32(haystack, 24) == 0x00000000 )
return (IPP2P_BIT * 100 + 71);
}
#endif
return 0;
}/*udp_search_bit*/
/*Search for Ares commands*/
//#define IPP2P_DEBUG_ARES
int
search_ares (const unsigned char *payload, const u16 plen)
//int search_ares (unsigned char *haystack, int packet_len, int head_len)
{
// const unsigned char *t = haystack + head_len;
/* all ares packets start with */
if (payload[1] == 0 && (plen - payload[0]) == 3)
{
switch (payload[2])
{
case 0x5a:
/* ares connect */
if ( plen == 6 && payload[5] == 0x05 ) return ((IPP2P_ARES * 100) + 1);
break;
case 0x09:
/* ares search, min 3 chars --> 14 bytes
* lets define a search can be up to 30 chars --> max 34 bytes
*/
if ( plen >= 14 && plen <= 34 ) return ((IPP2P_ARES * 100) + 1);
break;
#ifdef IPP2P_DEBUG_ARES
default:
printk(KERN_DEBUG "Unknown Ares command %x recognized, len: %u \n", (unsigned int) payload[2],plen);
#endif /* IPP2P_DEBUG_ARES */
}
}
#if 0
/* found connect packet: 03 00 5a 04 03 05 */
/* new version ares 1.8: 03 00 5a xx xx 05 */
if ((plen) == 6){ /* possible connect command*/
if ((payload[0] == 0x03) && (payload[1] == 0x00) && (payload[2] == 0x5a) && (payload[5] == 0x05))
return ((IPP2P_ARES * 100) + 1);
}
if ((plen) == 60){ /* possible download command*/
if ((payload[59] == 0x0a) && (payload[58] == 0x0a)){
if (memcmp(t, "PUSH SHA1:", 10) == 0) /* found download command */
return ((IPP2P_ARES * 100) + 2);
}
}
#endif
return 0;
} /*search_ares*/
/*Search for SoulSeek commands*/
int
search_soul (const unsigned char *payload, const u16 plen)
{
//#define IPP2P_DEBUG_SOUL
/* match: xx xx xx xx | xx = sizeof(payload) - 4 */
if (get_u32(payload, 0) == (plen - 4)){
const __u32 m=get_u32(payload, 4);
/* match 00 yy yy 00, yy can be everything */
if ( get_u8(payload, 4) == 0x00 && get_u8(payload, 7) == 0x00 )
{
#ifdef IPP2P_DEBUG_SOUL
printk(KERN_DEBUG "0: Soulseek command 0x%x recognized\n",get_u32(payload, 4));
#endif /* IPP2P_DEBUG_SOUL */
return ((IPP2P_SOUL * 100) + 1);
}
/* next match: 01 yy 00 00 | yy can be everything */
if ( get_u8(payload, 4) == 0x01 && get_u16(payload, 6) == 0x0000 )
{
#ifdef IPP2P_DEBUG_SOUL
printk(KERN_DEBUG "1: Soulseek command 0x%x recognized\n",get_u16(payload, 4));
#endif /* IPP2P_DEBUG_SOUL */
return ((IPP2P_SOUL * 100) + 2);
}
/* 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 */
/* try to do this in an intelligent way */
/* get all small commandos */
switch(m)
{
case 7:
case 9:
case 22:
case 23:
case 26:
case 28:
case 50:
case 51:
case 60:
case 91:
case 92:
case 1001:
#ifdef IPP2P_DEBUG_SOUL
printk(KERN_DEBUG "2: Soulseek command 0x%x recognized\n",get_u16(payload, 4));
#endif /* IPP2P_DEBUG_SOUL */
return ((IPP2P_SOUL * 100) + 3);
}
if (m > 0 && m < 6 )
{
#ifdef IPP2P_DEBUG_SOUL
printk(KERN_DEBUG "3: Soulseek command 0x%x recognized\n",get_u16(payload, 4));
#endif /* IPP2P_DEBUG_SOUL */
return ((IPP2P_SOUL * 100) + 4);
}
if (m > 12 && m < 19 )
{
#ifdef IPP2P_DEBUG_SOUL
printk(KERN_DEBUG "4: Soulseek command 0x%x recognized\n",get_u16(payload, 4));
#endif /* IPP2P_DEBUG_SOUL */
return ((IPP2P_SOUL * 100) + 5);
}
if (m > 34 && m < 38 )
{
#ifdef IPP2P_DEBUG_SOUL
printk(KERN_DEBUG "5: Soulseek command 0x%x recognized\n",get_u16(payload, 4));
#endif /* IPP2P_DEBUG_SOUL */
return ((IPP2P_SOUL * 100) + 6);
}
if (m > 39 && m < 47 )
{
#ifdef IPP2P_DEBUG_SOUL
printk(KERN_DEBUG "6: Soulseek command 0x%x recognized\n",get_u16(payload, 4));
#endif /* IPP2P_DEBUG_SOUL */
return ((IPP2P_SOUL * 100) + 7);
}
if (m > 61 && m < 70 )
{
#ifdef IPP2P_DEBUG_SOUL
printk(KERN_DEBUG "7: Soulseek command 0x%x recognized\n",get_u16(payload, 4));
#endif /* IPP2P_DEBUG_SOUL */
return ((IPP2P_SOUL * 100) + 8);
}
#ifdef IPP2P_DEBUG_SOUL
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);
#endif /* IPP2P_DEBUG_SOUL */
}
/* match 14 00 00 00 01 yy 00 00 00 STRING(YY) 01 00 00 00 00 46|50 00 00 00 00 */
/* without size at the beginning !!! */
if ( get_u32(payload, 0) == 0x14 && get_u8(payload, 4) == 0x01 )
{
__u32 y=get_u32(payload, 5);
/* we need 19 chars + string */
if ( (y + 19) <= (plen) )
{
const unsigned char *w=payload+9+y;
if (get_u32(w, 0) == 0x01 && ( get_u16(w, 4) == 0x4600 || get_u16(w, 4) == 0x5000) && get_u32(w, 6) == 0x00);
#ifdef IPP2P_DEBUG_SOUL
printk(KERN_DEBUG "Soulssek special client command recognized\n");
#endif /* IPP2P_DEBUG_SOUL */
return ((IPP2P_SOUL * 100) + 9);
}
}
return 0;
}
/*Search for WinMX commands*/
int
search_winmx (const unsigned char *payload, const u16 plen)
{
//#define IPP2P_DEBUG_WINMX
if (((plen) == 4) && (memcmp(payload, "SEND", 4) == 0)) return ((IPP2P_WINMX * 100) + 1);
if (((plen) == 3) && (memcmp(payload, "GET", 3) == 0)) return ((IPP2P_WINMX * 100) + 2);
//if (packet_len < (head_len + 10)) return 0;
if (plen < 10) return 0;
if ((memcmp(payload, "SEND", 4) == 0) || (memcmp(payload, "GET", 3) == 0)){
u16 c=4;
const u16 end=plen-2;
u8 count=0;
while (c < end)
{
if (payload[c]== 0x20 && payload[c+1] == 0x22)
{
c++;
count++;
if (count>=2) return ((IPP2P_WINMX * 100) + 3);
}
c++;
}
}
if ( plen == 149 && payload[0] == '8' )
{
#ifdef IPP2P_DEBUG_WINMX
printk(KERN_INFO "maybe WinMX\n");
#endif
if (get_u32(payload,17) == 0 && get_u32(payload,21) == 0 && get_u32(payload,25) == 0 &&
// get_u32(payload,33) == __constant_htonl(0x71182b1a) && get_u32(payload,37) == __constant_htonl(0x05050000) &&
// get_u32(payload,133) == __constant_htonl(0x31097edf) && get_u32(payload,145) == __constant_htonl(0xdcb8f792))
get_u16(payload,39) == 0 && get_u16(payload,135) == __constant_htons(0x7edf) && get_u16(payload,147) == __constant_htons(0xf792))
{
#ifdef IPP2P_DEBUG_WINMX
printk(KERN_INFO "got WinMX\n");
#endif
return ((IPP2P_WINMX * 100) + 4);
}
}
return 0;
} /*search_winmx*/
/*Search for appleJuice commands*/
int
search_apple (const unsigned char *payload, const u16 plen)
{
if ( (plen > 7) && (payload[6] == 0x0d) && (payload[7] == 0x0a) && (memcmp(payload, "ajprot", 6) == 0)) return (IPP2P_APPLE * 100);
return 0;
}
/*Search for BitTorrent commands*/
int
search_bittorrent (const unsigned char *payload, const u16 plen)
{
if (plen > 20)
{
/* test for match 0x13+"BitTorrent protocol" */
if (payload[0] == 0x13)
{
if (memcmp(payload+1, "BitTorrent protocol", 19) == 0) return (IPP2P_BIT * 100);
}
/* get tracker commandos, all starts with GET /
* then it can follow: scrape| announce
* and then ?hash_info=
*/
if (memcmp(payload,"GET /",5) == 0)
{
/* message scrape */
if ( memcmp(payload+5,"scrape?info_hash=",17)==0 ) return (IPP2P_BIT * 100 + 1);
/* message announce */
if ( memcmp(payload+5,"announce?info_hash=",19)==0 ) return (IPP2P_BIT * 100 + 2);
}
}
else
{
/* bitcomet encryptes the first packet, so we have to detect another
* one later in the flow */
/* first try failed, too many missdetections */
//if ( size == 5 && get_u32(t,0) == __constant_htonl(1) && t[4] < 3) return (IPP2P_BIT * 100 + 3);
/* second try: block request packets */
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);
}
return 0;
}
/*check for Kazaa get command*/
int
search_kazaa (const unsigned char *payload, const u16 plen)
{
if ((payload[plen-2] == 0x0d) && (payload[plen-1] == 0x0a) && memcmp(payload, "GET /.hash=", 11) == 0)
return (IPP2P_DATA_KAZAA * 100);
return 0;
}
/*check for gnutella get command*/
int
search_gnu (const unsigned char *payload, const u16 plen)
{
if ((payload[plen-2] == 0x0d) && (payload[plen-1] == 0x0a))
{
if (memcmp(payload, "GET /get/", 9) == 0) return ((IPP2P_DATA_GNU * 100) + 1);
if (memcmp(payload, "GET /uri-res/", 13) == 0) return ((IPP2P_DATA_GNU * 100) + 2);
}
return 0;
}
/*check for gnutella get commands and other typical data*/
int
search_all_gnu (const unsigned char *payload, const u16 plen)
{
if ((payload[plen-2] == 0x0d) && (payload[plen-1] == 0x0a))
{
if (memcmp(payload, "GNUTELLA CONNECT/", 17) == 0) return ((IPP2P_GNU * 100) + 1);
if (memcmp(payload, "GNUTELLA/", 9) == 0) return ((IPP2P_GNU * 100) + 2);
if ((memcmp(payload, "GET /get/", 9) == 0) || (memcmp(payload, "GET /uri-res/", 13) == 0))
{
u16 c=8;
const u16 end=plen-22;
while (c < end) {
if ( payload[c] == 0x0a && payload[c+1] == 0x0d && ((memcmp(&payload[c+2], "X-Gnutella-", 11) == 0) || (memcmp(&payload[c+2], "X-Queue:", 8) == 0)))
return ((IPP2P_GNU * 100) + 3);
c++;
}
}
}
return 0;
}
/*check for KaZaA download commands and other typical data*/
int
search_all_kazaa (const unsigned char *payload, const u16 plen)
{
if ((payload[plen-2] == 0x0d) && (payload[plen-1] == 0x0a))
{
if (memcmp(payload, "GIVE ", 5) == 0) return ((IPP2P_KAZAA * 100) + 1);
if (memcmp(payload, "GET /", 5) == 0) {
u16 c = 8;
const u16 end=plen-22;
while (c < end) {
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)))
return ((IPP2P_KAZAA * 100) + 2);
c++;
}
}
}
return 0;
}
/*fast check for edonkey file segment transfer command*/
int
search_edk (const unsigned char *payload, const u16 plen)
{
if (payload[0] != 0xe3)
return 0;
else {
if (payload[5] == 0x47)
return (IPP2P_DATA_EDK * 100);
else
return 0;
}
}
/*intensive but slower search for some edonkey packets including size-check*/
int
search_all_edk (const unsigned char *payload, const u16 plen)
{
if (payload[0] != 0xe3)
return 0;
else {
//t += head_len;
const u16 cmd = get_u16(payload, 1);
if (cmd == (plen - 5)) {
switch (payload[5]) {
case 0x01: return ((IPP2P_EDK * 100) + 1); /*Client: hello or Server:hello*/
case 0x4c: return ((IPP2P_EDK * 100) + 9); /*Client: Hello-Answer*/
}
}
return 0;
}
}
/*fast check for Direct Connect send command*/
int
search_dc (const unsigned char *payload, const u16 plen)
{
if (payload[0] != 0x24 )
return 0;
else {
if (memcmp(&payload[1], "Send|", 5) == 0)
return (IPP2P_DATA_DC * 100);
else
return 0;
}
}
/*intensive but slower check for all direct connect packets*/
int
search_all_dc (const unsigned char *payload, const u16 plen)
{
// unsigned char *t = haystack;
if (payload[0] == 0x24 && payload[plen-1] == 0x7c)
{
const unsigned char *t=&payload[1];
/* Client-Hub-Protocol */
if (memcmp(t, "Lock ", 5) == 0) return ((IPP2P_DC * 100) + 1);
/* Client-Client-Protocol, some are already recognized by client-hub (like lock) */
if (memcmp(t, "MyNick ", 7) == 0) return ((IPP2P_DC * 100) + 38);
}
return 0;
}
/*check for mute*/
int
search_mute (const unsigned char *payload, const u16 plen)
{
if ( plen == 209 || plen == 345 || plen == 473 || plen == 609 || plen == 1121 )
{
//printk(KERN_DEBUG "size hit: %u",size);
if (memcmp(payload,"PublicKey: ",11) == 0 )
{
return ((IPP2P_MUTE * 100) + 0);
/* if (memcmp(t+size-14,"\x0aEndPublicKey\x0a",14) == 0)
{
printk(KERN_DEBUG "end pubic key hit: %u",size);
}*/
}
}
return 0;
}
/* check for xdcc */
int
search_xdcc (const unsigned char *payload, const u16 plen)
{
/* search in small packets only */
if (plen > 20 && plen < 200 && payload[plen-1] == 0x0a && payload[plen-2] == 0x0d && memcmp(payload,"PRIVMSG ",8) == 0)
{
u16 x=10;
const u16 end=plen - 13;
/* is seems to be a irc private massage, chedck for xdcc command */
while (x < end)
{
if (payload[x] == ':')
{
if ( memcmp(&payload[x+1],"xdcc send #",11) == 0 )
return ((IPP2P_XDCC * 100) + 0);
}
x++;
}
}
return 0;
}
/* search for waste */
int search_waste(const unsigned char *payload, const u16 plen)
{
if ( plen >= 8 && memcmp(payload,"GET.sha1:",9) == 0)
return ((IPP2P_WASTE * 100) + 0);
return 0;
}
static struct {
int command;
__u8 short_hand; /*for fucntions included in short hands*/
int packet_len;
int (*function_name) (const unsigned char *, const u16);
} matchlist[] = {
{IPP2P_EDK,SHORT_HAND_IPP2P,20, &search_all_edk},
// {IPP2P_DATA_KAZAA,SHORT_HAND_DATA,200, &search_kazaa},
// {IPP2P_DATA_EDK,SHORT_HAND_DATA,60, &search_edk},
// {IPP2P_DATA_DC,SHORT_HAND_DATA,26, &search_dc},
{IPP2P_DC,SHORT_HAND_IPP2P,5, search_all_dc},
// {IPP2P_DATA_GNU,SHORT_HAND_DATA,40, &search_gnu},
{IPP2P_GNU,SHORT_HAND_IPP2P,5, &search_all_gnu},
{IPP2P_KAZAA,SHORT_HAND_IPP2P,5, &search_all_kazaa},
{IPP2P_BIT,SHORT_HAND_IPP2P,20, &search_bittorrent},
{IPP2P_APPLE,SHORT_HAND_IPP2P,5, &search_apple},
{IPP2P_SOUL,SHORT_HAND_IPP2P,5, &search_soul},
{IPP2P_WINMX,SHORT_HAND_IPP2P,2, &search_winmx},
{IPP2P_ARES,SHORT_HAND_IPP2P,5, &search_ares},
{IPP2P_MUTE,SHORT_HAND_NONE,200, &search_mute},
{IPP2P_WASTE,SHORT_HAND_NONE,5, &search_waste},
{IPP2P_XDCC,SHORT_HAND_NONE,5, &search_xdcc},
{0,0,0,NULL}
};
static struct {
int command;
__u8 short_hand; /*for fucntions included in short hands*/
int packet_len;
int (*function_name) (unsigned char *, int);
} udp_list[] = {
{IPP2P_KAZAA,SHORT_HAND_IPP2P,14, &udp_search_kazaa},
{IPP2P_BIT,SHORT_HAND_IPP2P,23, &udp_search_bit},
{IPP2P_GNU,SHORT_HAND_IPP2P,11, &udp_search_gnu},
{IPP2P_EDK,SHORT_HAND_IPP2P,9, &udp_search_edk},
{IPP2P_DC,SHORT_HAND_IPP2P,12, &udp_search_directconnect},
{0,0,0,NULL}
};
static int
match(const struct sk_buff *skb,
const struct net_device *in,
const struct net_device *out,
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,17)
const struct xt_match *match,
#endif
const void *matchinfo,
int offset,
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0)
const void *hdr,
u_int16_t datalen,
#endif
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,16)
unsigned int protoff,
#endif
int *hotdrop)
{
const struct ipt_p2p_info *info = matchinfo;
unsigned char *haystack;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,22)
struct iphdr *ip = ip_hdr(skb);
#else
struct iphdr *ip = skb->nh.iph;
#endif
int p2p_result = 0, i = 0;
// int head_len;
int hlen = ntohs(ip->tot_len)-(ip->ihl*4); /*hlen = packet-data length*/
/*must not be a fragment*/
if (offset) {
if (info->debug) printk("IPP2P.match: offset found %i \n",offset);
return 0;
}
/*make sure that skb is linear*/
if(skb_is_nonlinear(skb)){
if (info->debug) printk("IPP2P.match: nonlinear skb found\n");
return 0;
}
haystack=(char *)ip+(ip->ihl*4); /*haystack = packet data*/
switch (ip->protocol){
case IPPROTO_TCP: /*what to do with a TCP packet*/
{
struct tcphdr *tcph = (void *) ip + ip->ihl * 4;
if (tcph->fin) return 0; /*if FIN bit is set bail out*/
if (tcph->syn) return 0; /*if SYN bit is set bail out*/
if (tcph->rst) return 0; /*if RST bit is set bail out*/
haystack += tcph->doff * 4; /*get TCP-Header-Size*/
hlen -= tcph->doff * 4;
while (matchlist[i].command) {
if ((((info->cmd & matchlist[i].command) == matchlist[i].command) ||
((info->cmd & matchlist[i].short_hand) == matchlist[i].short_hand)) &&
(hlen > matchlist[i].packet_len)) {
p2p_result = matchlist[i].function_name(haystack, hlen);
if (p2p_result)
{
if (info->debug) printk("IPP2P.debug:TCP-match: %i from: %u.%u.%u.%u:%i to: %u.%u.%u.%u:%i Length: %i\n",
p2p_result, NIPQUAD(ip->saddr),ntohs(tcph->source), NIPQUAD(ip->daddr),ntohs(tcph->dest),hlen);
return p2p_result;
}
}
i++;
}
return p2p_result;
}
case IPPROTO_UDP: /*what to do with an UDP packet*/
{
struct udphdr *udph = (void *) ip + ip->ihl * 4;
while (udp_list[i].command){
if ((((info->cmd & udp_list[i].command) == udp_list[i].command) ||
((info->cmd & udp_list[i].short_hand) == udp_list[i].short_hand)) &&
(hlen > udp_list[i].packet_len)) {
p2p_result = udp_list[i].function_name(haystack, hlen);
if (p2p_result){
if (info->debug) printk("IPP2P.debug:UDP-match: %i from: %u.%u.%u.%u:%i to: %u.%u.%u.%u:%i Length: %i\n",
p2p_result, NIPQUAD(ip->saddr),ntohs(udph->source), NIPQUAD(ip->daddr),ntohs(udph->dest),hlen);
return p2p_result;
}
}
i++;
}
return p2p_result;
}
default: return 0;
}
}
static int
checkentry(const char *tablename,
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,16)
const void *ip,
#else
const struct ipt_ip *ip,
#endif
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,17)
const struct xt_match *match,
#endif
void *matchinfo,
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,19)
unsigned int matchsize,
#endif
unsigned int hook_mask)
{
/* Must specify -p tcp */
/* if (ip->proto != IPPROTO_TCP || (ip->invflags & IPT_INV_PROTO)) {
* printk("ipp2p: Only works on TCP packets, use -p tcp\n");
* return 0;
* }*/
return 1;
}
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,21)
static struct xt_match ipp2p_match = {
#else
static struct ipt_match ipp2p_match = {
#endif
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0)
{ NULL, NULL },
"ipp2p",
&match,
&checkentry,
NULL,
THIS_MODULE
#endif
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
.name = "ipp2p",
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,21)
.family = AF_INET,
#endif
.match = &match,
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,17)
.matchsize = sizeof(struct ipt_p2p_info),
#endif
.checkentry = &checkentry,
.me = THIS_MODULE,
#endif
};
static int __init init(void)
{
printk(KERN_INFO "IPP2P v%s loading\n", IPP2P_VERSION);
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,21)
return xt_register_match(&ipp2p_match);
#else
return ipt_register_match(&ipp2p_match);
#endif
}
static void __exit fini(void)
{
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,21)
xt_unregister_match(&ipp2p_match);
#else
ipt_unregister_match(&ipp2p_match);
#endif
printk(KERN_INFO "IPP2P v%s unloaded\n", IPP2P_VERSION);
}
module_init(init);
module_exit(fini);

31
extensions/xt_ipp2p.h Normal file
View File

@@ -0,0 +1,31 @@
#ifndef __IPT_IPP2P_H
#define __IPT_IPP2P_H
#define IPP2P_VERSION "0.8.1_rc1"
struct ipt_p2p_info {
int cmd;
int debug;
};
#endif //__IPT_IPP2P_H
#define SHORT_HAND_IPP2P 1 /* --ipp2p switch*/
//#define SHORT_HAND_DATA 4 /* --ipp2p-data switch*/
#define SHORT_HAND_NONE 5 /* no short hand*/
#define IPP2P_EDK (1 << 1)
#define IPP2P_DATA_KAZAA (1 << 2)
#define IPP2P_DATA_EDK (1 << 3)
#define IPP2P_DATA_DC (1 << 4)
#define IPP2P_DC (1 << 5)
#define IPP2P_DATA_GNU (1 << 6)
#define IPP2P_GNU (1 << 7)
#define IPP2P_KAZAA (1 << 8)
#define IPP2P_BIT (1 << 9)
#define IPP2P_APPLE (1 << 10)
#define IPP2P_SOUL (1 << 11)
#define IPP2P_WINMX (1 << 12)
#define IPP2P_ARES (1 << 13)
#define IPP2P_MUTE (1 << 14)
#define IPP2P_WASTE (1 << 15)
#define IPP2P_XDCC (1 << 16)

1
mconfig
View File

@@ -8,4 +8,5 @@ build_TARPIT=m
build_TEE=m
build_condition=m
build_geoip=m
build_ipp2p=m
build_portscan=m