qi-hardware/openwrt-xburst
1
0
Fork 0
mirror of git://projects.qi-hardware.com/openwrt-xburst.git synced 2024-09-12 21:57:08 +03:00
Code
75a7a9fc48
openwrt-xburst/package/linux/kernel-patches/304-netfilter-ipp2p-0.7.4
wbx e69d8c0d8f uncompress patches, requested by Kaloz 
git-svn-id: svn://svn.openwrt.org/openwrt/trunk/openwrt@460 3c298f89-4303-0410-b956-a3cf2f4a3e73
2005-03-26 10:33:32 +00:00

721 lines
23 KiB
Groff
Raw Blame History

diff -urN linux-2.4.29.old/include/linux/netfilter_ipv4/ipt_ipp2p.h linux-2.4.29/include/linux/netfilter_ipv4/ipt_ipp2p.h
--- linux-2.4.29.old/include/linux/netfilter_ipv4/ipt_ipp2p.h 1970-01-01 01:00:00.000000000 +0100
+++ linux-2.4.29/include/linux/netfilter_ipv4/ipt_ipp2p.h 2005-03-12 00:44:17.000000000 +0100
@@ -0,0 +1,29 @@
+#ifndef __IPT_IPP2P_H
+#define __IPT_IPP2P_H
+#define IPP2P_VERSION "0.7.4"
+
+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 2
+#define IPP2P_DATA_KAZAA 8
+#define IPP2P_DATA_EDK 16
+#define IPP2P_DATA_DC 32
+#define IPP2P_DC 64
+#define IPP2P_DATA_GNU 128
+#define IPP2P_GNU 256
+#define IPP2P_KAZAA 512
+#define IPP2P_BIT 1024
+#define IPP2P_APPLE 2048
+#define IPP2P_SOUL 4096
+#define IPP2P_WINMX 8192
+#define IPP2P_ARES 16384
+
diff -urN linux-2.4.29.old/net/ipv4/netfilter/Config.in linux-2.4.29/net/ipv4/netfilter/Config.in
--- linux-2.4.29.old/net/ipv4/netfilter/Config.in 2005-03-12 00:40:38.000000000 +0100
+++ linux-2.4.29/net/ipv4/netfilter/Config.in 2005-03-12 00:42:57.000000000 +0100
@@ -26,6 +26,7 @@
dep_tristate ' TOS match support' CONFIG_IP_NF_MATCH_TOS $CONFIG_IP_NF_IPTABLES
dep_tristate ' recent match support' CONFIG_IP_NF_MATCH_RECENT $CONFIG_IP_NF_IPTABLES
dep_tristate ' ECN match support' CONFIG_IP_NF_MATCH_ECN $CONFIG_IP_NF_IPTABLES
+ dep_tristate ' peer to peer traffic match support' CONFIG_IP_NF_MATCH_IPP2P $CONFIG_IP_NF_IPTABLES
dep_tristate ' DSCP match support' CONFIG_IP_NF_MATCH_DSCP $CONFIG_IP_NF_IPTABLES
diff -urN linux-2.4.29.old/net/ipv4/netfilter/ipt_ipp2p.c linux-2.4.29/net/ipv4/netfilter/ipt_ipp2p.c
--- linux-2.4.29.old/net/ipv4/netfilter/ipt_ipp2p.c 1970-01-01 01:00:00.000000000 +0100
+++ linux-2.4.29/net/ipv4/netfilter/ipt_ipp2p.c 2005-03-12 00:44:02.000000000 +0100
@@ -0,0 +1,661 @@
+#if defined(MODVERSIONS)
+#include <linux/modversions.h>
+#endif
+#include <linux/module.h>
+#include <linux/netfilter_ipv4/ip_tables.h>
+#include <linux/version.h>
+#include <linux/netfilter_ipv4/ipt_ipp2p.h>
+//#include "ipt_ipp2p.h"
+#include <net/tcp.h>
+#include <net/udp.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 <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]) {
+ /* e3 9a + 16Bytes Hash | size == 26 */
+ case 0x9a: if (packet_len == 26) return ((IPP2P_EDK * 100) + 1);
+ /* e3 96 xx yy zz kk | size == 14 | server status request */
+ case 0x96: if (packet_len == 14) return ((IPP2P_EDK * 100) + 2);
+ /* e3 a2 | size == 10 or 14 <-- recheck*/
+ }
+ }
+
+ case 0xc5: { /*emule*/
+ switch (t[1]) {
+ /* c5 91 xx yy | size == 12 (8+4) | xx != 0x00 -- xx yy queue rating */
+ case 0x91: if ((packet_len == 12) && (t[2] != 0x00)) return ((IPP2P_EDK * 100) + 3);
+ /* c5 90 xx .. yy | size == 26 (8+2+16) | xx .. yy == hash -- file ping */
+ case 0x90: if ((packet_len == 26) && (t[2] != 0x00)) return ((IPP2P_EDK * 100) + 4);
+ /* c5 92 | size == 10 (8+2) -- file not found */
+ case 0x92: if (packet_len == 10) return ((IPP2P_EDK * 100) + 5);
+ /* c5 93 | size == 10 (8+2) -- queue full */
+ case 0x93: if (packet_len == 10) return ((IPP2P_EDK * 100) + 6);
+ }
+ }
+
+ case 0xe4: { /*kad*/
+ switch (t[1]) {
+ /* e4 50 | size == 12 */
+ case 0x50: if (packet_len == 12) return ((IPP2P_EDK * 100) + 7);
+ /* e4 58 | size == 14 */
+ case 0x58: if ((packet_len == 14) && (t[2] != 0x00)) return ((IPP2P_EDK * 100) + 8);
+ /* e4 59 | size == 10 */
+ case 0x59: if (packet_len == 10) return ((IPP2P_EDK * 100) + 9);
+ /* e4 30 .. | t[18] == 0x01 | size > 26 | --> search */
+ case 0x30: if ((packet_len > 26) && (t[18] == 0x01)) return ((IPP2P_EDK * 100) + 10);
+ /* e4 28 .. 00 | t[68] == 0x00 | size > 76 */
+ case 0x28: if ((packet_len > 76) && (t[68] == 0x00)) return ((IPP2P_EDK * 100) + 11);
+ /* e4 20 .. | size == 43 */
+ case 0x20: if ((packet_len == 43) && (t[2] != 0x00) && (t[34] != 0x00)) return ((IPP2P_EDK * 100) + 12);
+ /* e4 00 .. 00 | size == 35 ? */
+ case 0x00: if ((packet_len == 35) && (t[26] == 0x00)) return ((IPP2P_EDK * 100) + 13);
+ /* e4 10 .. 00 | size == 35 ? */
+ case 0x10: if ((packet_len == 35) && (t[26] == 0x00)) return ((IPP2P_EDK * 100) + 14);
+ /* e4 18 .. 00 | size == 35 ? */
+ case 0x18: if ((packet_len == 35) && (t[26] == 0x00)) return ((IPP2P_EDK * 100) + 15);
+ /* e4 40 .. | t[18] == 0x01 | t[19] == 0x00 | size > 40 */
+ case 0x40: if ((packet_len > 40) && (t[18] == 0x01) && (t[19] == 0x00)) return ((IPP2P_EDK * 100) + 16);
+ }
+ }
+
+ default: return 0;
+ } /* end of switch (t[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) + 1);
+ if (memcmp(t, "GNUTELLA ", 9) == 0) return ((IPP2P_GNU * 100) + 2);
+ 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);
+ }
+ return 0;
+}/*udp_search_kazaa*/
+
+
+/*Search for UDP BitTorrent commands*/
+int
+udp_search_bit (unsigned char *haystack, int packet_len)
+{
+ unsigned char *t = haystack;
+
+ /* packet_len has to be 24 */
+ if (packet_len != 24) return 0;
+
+ t += 8;
+
+ /* ^ 00 00 04 17 27 10 19 80 */
+ if ((ntohl(get_u32(t, 0)) == 0x00000417) && (ntohl(get_u32(t, 4)) == 0x27101980)) return (IPP2P_BIT * 100);
+
+ return 0;
+}/*udp_search_bit*/
+
+
+
+/*Search for Ares commands*/
+int
+search_ares (unsigned char *haystack, int packet_len, int head_len)
+{
+ unsigned char *t = haystack;
+ t += head_len;
+
+ if ((packet_len - head_len) == 6){ /* possible connect command*/
+ if ((t[0] == 0x03) && (t[1] == 0x00) && (t[2] == 0x5a) && (t[3] == 0x04) && (t[4] == 0x03) && (t[5] == 0x05))
+ return ((IPP2P_ARES * 100) + 1); /* found connect packet: 03 00 5a 04 03 05 */
+ }
+ if ((packet_len - head_len) == 60){ /* possible download command*/
+ if ((t[59] == 0x0a) && (t[58] == 0x0a)){
+ if (memcmp(t, "PUSH SHA1:", 10) == 0) /* found download command */
+ return ((IPP2P_ARES * 100) + 2);
+ }
+ }
+ return 0;
+} /*search_ares*/
+
+
+/*Search for SoulSeek commands*/
+int
+search_soul (unsigned char *haystack, int packet_len, int head_len)
+{
+ unsigned char *t = haystack;
+ t += head_len;
+
+ if (get_u16(t, 0) == (packet_len - head_len - 4)){
+ /* xx xx 00 00 yy zz 00 00 .. | xx = sizeof(payload) - 4 */
+ if ((get_u16(t,2) == 0x0000) &&(t[4] != 0x00) && (get_u16(t,6) == 0x0000))
+ return ((IPP2P_SOUL * 100) + 1);
+ } else {
+ /* 00 00 00 00 00 00 00 00 + sizeof(payload) == 8*/
+ if (((packet_len - head_len) == 8) && (get_u32(t, 0) == 0x00000000) && (get_u32(t, 4) == 0x00000000))
+ return ((IPP2P_SOUL * 100) + 2);
+ }
+
+ /* 01 xx 00 00 00 yy .. zz 00 00 00 .. | xx == sizeof(nick) | yy .. zz == nick */
+ if ((t[0] == 0x01) && (t[2] == 0x00) && (get_u16(t,3) == 0x0000) && ((packet_len - head_len) > ((get_u8(t,1))+6)) &&
+ (t[(get_u8(t,1))+4] != 0x00) && (t[(get_u8(t,1))+5] == 0x01) && (t[(get_u8(t,1))+6] == 0x00))
+ return ((IPP2P_SOUL * 100) + 3);
+ return 0;
+}
+
+
+/*Search for WinMX commands*/
+int
+search_winmx (unsigned char *haystack, int packet_len, int head_len)
+{
+ unsigned char *t = haystack;
+ int c;
+ t += head_len;
+
+ if (((packet_len - head_len) == 4) && (memcmp(t, "SEND", 4) == 0)) return ((IPP2P_WINMX * 100) + 1);
+ if (((packet_len - head_len) == 3) && (memcmp(t, "GET", 3) == 0)) return ((IPP2P_WINMX * 100) + 2);
+ if (packet_len < (head_len + 10)) return 0;
+
+ if ((memcmp(t, "SEND", 4) == 0) || (memcmp(t, "GET", 3) == 0)){
+ c = head_len + 4;
+ t += 4;
+ while (c < packet_len - 5) {
+ if ((t[0] == 0x20) && (t[1] == 0x22)){
+ c += 2;
+ t += 2;
+ while (c < packet_len - 2) {
+ if ((t[0] == 0x22) && (t[1] == 0x20)) return ((IPP2P_WINMX * 100) + 3);
+ t++;
+ c++;
+ }
+ }
+ t++;
+ c++;
+ }
+ }
+ return 0;
+} /*search_winmx*/
+
+
+/*Search for appleJuice commands*/
+int
+search_apple (unsigned char *haystack, int packet_len, int head_len)
+{
+ unsigned char *t = haystack;
+ t += head_len;
+
+ if ((memcmp(t, "ajprot", 6) == 0) && (t[6] == 0x0d) && (t[7] == 0x0a)) return (IPP2P_APPLE * 100);
+
+ return 0;
+}
+
+
+/*Search for BitTorrent commands*/
+int
+search_bittorrent (unsigned char *haystack, int packet_len, int head_len)
+{
+
+ unsigned char *t = haystack;
+ if (*(haystack+head_len) != 0x13) return 0; /*Bail out of first byte != 0x13*/
+
+ t += head_len + 1;
+
+ if (memcmp(t, "BitTorrent protocol", 19) == 0) return (IPP2P_BIT * 100);
+ return 0;
+}
+
+
+
+/*check for Kazaa get command*/
+int
+search_kazaa (unsigned char *haystack, int packet_len, int head_len)
+{
+ unsigned char *t = haystack;
+
+ if (!((*(haystack + packet_len - 2) == 0x0d) && (*(haystack + packet_len - 1) == 0x0a))) return 0;
+
+ t += head_len;
+ if (memcmp(t, "GET /.hash=", 11) == 0)
+ return (IPP2P_DATA_KAZAA * 100);
+ else
+ return 0;
+}
+
+
+/*check for gnutella get command*/
+int
+search_gnu (unsigned char *haystack, int packet_len, int head_len)
+{
+ unsigned char *t = haystack;
+
+ if (!((*(haystack + packet_len - 2) == 0x0d) && (*(haystack + packet_len - 1) == 0x0a))) return 0;
+
+ t += head_len;
+ if (memcmp(t, "GET /get/", 9) == 0) return ((IPP2P_DATA_GNU * 100) + 1);
+ if (memcmp(t, "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 (unsigned char *haystack, int packet_len, int head_len)
+{
+ unsigned char *t = haystack;
+ int c;
+
+ if (!((*(haystack + packet_len - 2) == 0x0d) && (*(haystack + packet_len - 1) == 0x0a))) return 0;
+
+ t += head_len;
+
+ if (memcmp(t, "GNUTELLA CONNECT/", 17) == 0) return ((IPP2P_GNU * 100) + 1);
+ if (memcmp(t, "GNUTELLA/", 9) == 0) return ((IPP2P_GNU * 100) + 2);
+
+ if ((memcmp(t, "GET /get/", 9) == 0) || (memcmp(t, "GET /uri-res/", 13) == 0))
+ {
+ c = head_len + 8;
+ t += 8;
+ while (c < packet_len - 22) {
+ if ((t[0] == 0x0d) && (t[1] == 0x0a)) {
+ t += 2;
+ c += 2;
+ if ((memcmp(t, "X-Gnutella-", 11) == 0) || (memcmp(t, "X-Queue:", 8) == 0)) return ((IPP2P_GNU * 100) + 3);
+ } else {
+ t++;
+ c++;
+ }
+ }
+ }
+ return 0;
+}
+
+
+/*check for KaZaA download commands and other typical data*/
+int
+search_all_kazaa (unsigned char *haystack, int packet_len, int head_len)
+{
+ unsigned char *t = haystack;
+ int c;
+
+ if (!((*(haystack + packet_len - 2) == 0x0d) && (*(haystack + packet_len - 1) == 0x0a))) return 0;
+
+ t += head_len;
+ if (memcmp(t, "GIVE ", 5) == 0) return ((IPP2P_KAZAA * 100) + 1);
+
+ if (memcmp(t, "GET /", 5) == 0) {
+ c = head_len + 8;
+ t += 8;
+ while (c < packet_len - 22) {
+ if ((t[0] == 0x0d) && (t[1] == 0x0a)) {
+ t += 2;
+ c += 2;
+ if ( memcmp(t, "X-Kazaa-Username: ", 18) == 0 ) return ((IPP2P_KAZAA * 100) + 2);
+ if ( memcmp(t, "User-Agent: PeerEnabler/", 24) == 0 ) return ((IPP2P_KAZAA * 100) + 3);
+ } else {
+ t++;
+ c++;
+ }
+ }
+ }
+
+ return 0;
+}
+
+/*fast check for edonkey file segment transfer command*/
+int
+search_edk (unsigned char *haystack, int packet_len, int head_len)
+{
+ if (*(haystack+head_len) != 0xe3)
+ return 0;
+ else {
+ if (*(haystack+head_len+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 (unsigned char *haystack, int packet_len, int head_len)
+{
+ unsigned char *t = haystack;
+ int cmd;
+
+ if (*(haystack+head_len) == 0xd4) {
+ t += head_len;
+ cmd = get_u16(t, 1);
+ if (cmd == (packet_len - head_len - 5)) {
+ switch (t[5]) {
+ case 0x82: return ((IPP2P_EDK * 100) + 42);
+ case 0x15: return ((IPP2P_EDK * 100) + 43);
+ default: return 0;
+ }
+ }
+ return 0;
+ }
+
+
+ if (*(haystack+head_len) == 0xc5) { /*search for additional eMule packets*/
+ t += head_len;
+ cmd = get_u16(t, 1);
+
+ if (cmd == (packet_len - head_len - 5)) {
+ switch (t[5]) {
+ case 0x01: return ((IPP2P_EDK * 100) + 30);
+ case 0x02: return ((IPP2P_EDK * 100) + 31);
+ case 0x60: return ((IPP2P_EDK * 100) + 32);
+ case 0x81: return ((IPP2P_EDK * 100) + 33);
+ case 0x82: return ((IPP2P_EDK * 100) + 34);
+ case 0x85: return ((IPP2P_EDK * 100) + 35);
+ case 0x86: return ((IPP2P_EDK * 100) + 36);
+ case 0x87: return ((IPP2P_EDK * 100) + 37);
+ case 0x40: return ((IPP2P_EDK * 100) + 38);
+ case 0x92: return ((IPP2P_EDK * 100) + 39);
+ case 0x93: return ((IPP2P_EDK * 100) + 40);
+ case 0x12: return ((IPP2P_EDK * 100) + 41);
+ default: return 0;
+ }
+ }
+
+ return 0;
+ }
+
+
+ if (*(haystack+head_len) != 0xe3)
+ return 0;
+ else {
+ t += head_len;
+ cmd = get_u16(t, 1);
+ if (cmd == (packet_len - head_len - 5)) {
+ switch (t[5]) {
+ case 0x01: return ((IPP2P_EDK * 100) + 1); /*Client: hello or Server:hello*/
+ case 0x50: return ((IPP2P_EDK * 100) + 2); /*Client: file status*/
+ case 0x16: return ((IPP2P_EDK * 100) + 3); /*Client: search*/
+ case 0x58: return ((IPP2P_EDK * 100) + 4); /*Client: file request*/
+ case 0x48: return ((IPP2P_EDK * 100) + 5); /*???*/
+ case 0x54: return ((IPP2P_EDK * 100) + 6); /*???*/
+ case 0x47: return ((IPP2P_EDK * 100) + 7); /*Client: file segment request*/
+ case 0x46: return ((IPP2P_EDK * 100) + 8); /*Client: download segment*/
+ case 0x4c: return ((IPP2P_EDK * 100) + 9); /*Client: Hello-Answer*/
+ case 0x4f: return ((IPP2P_EDK * 100) + 10); /*Client: file status request*/
+ case 0x59: return ((IPP2P_EDK * 100) + 11); /*Client: file request answer*/
+ case 0x65: return ((IPP2P_EDK * 100) + 12); /*Client: ???*/
+ case 0x66: return ((IPP2P_EDK * 100) + 13); /*Client: ???*/
+ case 0x51: return ((IPP2P_EDK * 100) + 14); /*Client: ???*/
+ case 0x52: return ((IPP2P_EDK * 100) + 15); /*Client: ???*/
+ case 0x4d: return ((IPP2P_EDK * 100) + 16); /*Client: ???*/
+ case 0x5c: return ((IPP2P_EDK * 100) + 17); /*Client: ???*/
+ case 0x38: return ((IPP2P_EDK * 100) + 18); /*Client: ???*/
+ case 0x69: return ((IPP2P_EDK * 100) + 19); /*Client: ???*/
+ case 0x19: return ((IPP2P_EDK * 100) + 20); /*Client: ???*/
+ case 0x42: return ((IPP2P_EDK * 100) + 21); /*Client: ???*/
+ case 0x34: return ((IPP2P_EDK * 100) + 22); /*Client: ???*/
+ case 0x94: return ((IPP2P_EDK * 100) + 23); /*Client: ???*/
+ case 0x1c: return ((IPP2P_EDK * 100) + 24); /*Client: ???*/
+ case 0x6a: return ((IPP2P_EDK * 100) + 25); /*Client: ???*/
+ default: return 0;
+ }
+ } else {
+ if (cmd > packet_len - head_len - 5) {
+ if ((t[3] == 0x00) && (t[4] == 0x00)) {
+ if (t[5] == 0x01) return ((IPP2P_EDK * 100) + 26);
+ if (t[5] == 0x4c) return ((IPP2P_EDK * 100) + 27);
+ }
+ return 0;
+
+ } /*non edk packet*/
+ if (t[cmd+5] == 0xe3) return ((IPP2P_EDK * 100) + 28);/*found another edk-command*/
+ if (t[cmd+5] == 0xc5) return ((IPP2P_EDK * 100) + 29);/*found an emule-command*/
+ return 0;
+ }
+ }
+}
+
+
+/*fast check for Direct Connect send command*/
+int
+search_dc (unsigned char *haystack, int packet_len, int head_len)
+{
+ unsigned char *t = haystack;
+
+ if (*(haystack+head_len) != 0x24 )
+ return 0;
+ else {
+ t += head_len + 1;
+ if (memcmp(t, "Send|", 5) == 0)
+ return (IPP2P_DATA_DC * 100);
+ else
+ return 0;
+ }
+
+}
+
+
+/*intensive but slower check for all direct connect packets*/
+int
+search_all_dc (unsigned char *haystack, int packet_len, int head_len)
+{
+ unsigned char *t = haystack;
+
+ if ((*(haystack + head_len) == 0x24) && (*(haystack + packet_len - 1) == 0x7c)) {
+ t += head_len + 1;
+ if (memcmp(t, "Lock ", 5) == 0) return ((IPP2P_DC * 100) + 1); /*hub: hello*/
+ if (memcmp(t, "Key ", 4) == 0) return ((IPP2P_DC * 100) + 2); /*client: hello*/
+ if (memcmp(t, "Hello ", 6) == 0) return ((IPP2P_DC * 100) + 3); /*hub:connected*/
+ if (memcmp(t, "MyNick ", 7) == 0) return ((IPP2P_DC * 100) + 4); /*client-client: hello*/
+ if (memcmp(t, "Search ", 7) == 0) return ((IPP2P_DC * 100) + 5); /*client: search*/
+ if (memcmp(t, "Send", 4) == 0) return ((IPP2P_DC * 100) + 6); /*client: start download*/
+ return 0;
+ } else
+ return 0;
+}
+
+
+static struct {
+ int command;
+ __u8 short_hand; /*for fucntions included in short hands*/
+ int packet_len;
+ int (*function_name) (unsigned char *, int, int);
+} matchlist[] = {
+ {IPP2P_EDK,SHORT_HAND_IPP2P,40, &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,25, search_all_dc},
+ {IPP2P_DATA_GNU,SHORT_HAND_DATA,40, &search_gnu},
+ {IPP2P_GNU,SHORT_HAND_IPP2P,35, &search_all_gnu},
+ {IPP2P_KAZAA,SHORT_HAND_IPP2P,35, &search_all_kazaa},
+ {IPP2P_BIT,SHORT_HAND_NONE,40, &search_bittorrent},
+ {IPP2P_APPLE,SHORT_HAND_NONE,20, &search_apple},
+ {IPP2P_SOUL,SHORT_HAND_NONE,25, &search_soul},
+ {IPP2P_WINMX,SHORT_HAND_NONE,20, &search_winmx},
+ {IPP2P_ARES,SHORT_HAND_NONE,25, &search_ares},
+ {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_NONE,23, &udp_search_bit},
+ {IPP2P_GNU,SHORT_HAND_IPP2P,11, &udp_search_gnu},
+ {IPP2P_EDK,SHORT_HAND_IPP2P,9, &udp_search_edk},
+ {0,0,0,NULL}
+};
+
+
+static int
+match(const struct sk_buff *skb,
+ const struct net_device *in,
+ const struct net_device *out,
+ const void *matchinfo,
+ int offset,
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0)
+ const void *hdr,
+ u_int16_t datalen,
+#endif
+
+ int *hotdrop)
+{
+ const struct ipt_p2p_info *info = matchinfo;
+ unsigned char *haystack;
+ struct iphdr *ip = skb->nh.iph;
+ 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*/
+ head_len = tcph->doff * 4; /*get TCP-Header-Size*/
+ 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, head_len);
+ 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,
+ const struct ipt_ip *ip,
+ void *matchinfo,
+ unsigned int matchsize,
+ 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;
+}
+
+
+
+
+static struct ipt_match ipp2p_match = {
+#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",
+ .match = &match,
+ .checkentry = &checkentry,
+ .me = THIS_MODULE,
+#endif
+};
+
+
+static int __init init(void)
+{
+ printk(KERN_INFO "IPP2P v%s loading\n", IPP2P_VERSION);
+ return ipt_register_match(&ipp2p_match);
+}
+
+static void __exit fini(void)
+{
+ ipt_unregister_match(&ipp2p_match);
+ printk(KERN_INFO "IPP2P v%s unloaded\n", IPP2P_VERSION);
+}
+
+module_init(init);
+module_exit(fini);
+
+
diff -urN linux-2.4.29.old/net/ipv4/netfilter/Makefile linux-2.4.29/net/ipv4/netfilter/Makefile
--- linux-2.4.29.old/net/ipv4/netfilter/Makefile 2005-03-12 00:40:38.000000000 +0100
+++ linux-2.4.29/net/ipv4/netfilter/Makefile 2005-03-12 00:42:57.000000000 +0100
@@ -67,6 +67,7 @@
obj-$(CONFIG_IP_NF_MATCH_LIMIT) += ipt_limit.o
obj-$(CONFIG_IP_NF_MATCH_MARK) += ipt_mark.o
obj-$(CONFIG_IP_NF_MATCH_MAC) += ipt_mac.o
+obj-$(CONFIG_IP_NF_MATCH_IPP2P) += ipt_ipp2p.o
obj-$(CONFIG_IP_NF_MATCH_PKTTYPE) += ipt_pkttype.o
obj-$(CONFIG_IP_NF_MATCH_MULTIPORT) += ipt_multiport.o
View Git Blame Copy Permalink