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https://github.com/openwrt/openwrt.git
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merge netfilter changes to 2.6.27
SVN-Revision: 14598
This commit is contained in:
Felix Fietkau
parent
ab0b42246a
commit
76061ee2a1
@ -1,919 +0,0 @@
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--- /dev/null
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+++ b/include/linux/netfilter_ipv4/ipt_ipp2p.h
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@@ -0,0 +1,31 @@
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+#ifndef __IPT_IPP2P_H
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+#define __IPT_IPP2P_H
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+#define IPP2P_VERSION "0.8.1_rc1"
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+
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+struct ipt_p2p_info {
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+ int cmd;
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+ int debug;
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+};
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+
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+#endif //__IPT_IPP2P_H
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+
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+#define SHORT_HAND_IPP2P 1 /* --ipp2p switch*/
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+//#define SHORT_HAND_DATA 4 /* --ipp2p-data switch*/
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+#define SHORT_HAND_NONE 5 /* no short hand*/
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+
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+#define IPP2P_EDK (1 << 1)
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+#define IPP2P_DATA_KAZAA (1 << 2)
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+#define IPP2P_DATA_EDK (1 << 3)
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+#define IPP2P_DATA_DC (1 << 4)
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+#define IPP2P_DC (1 << 5)
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+#define IPP2P_DATA_GNU (1 << 6)
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+#define IPP2P_GNU (1 << 7)
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+#define IPP2P_KAZAA (1 << 8)
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+#define IPP2P_BIT (1 << 9)
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+#define IPP2P_APPLE (1 << 10)
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+#define IPP2P_SOUL (1 << 11)
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+#define IPP2P_WINMX (1 << 12)
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+#define IPP2P_ARES (1 << 13)
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+#define IPP2P_MUTE (1 << 14)
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+#define IPP2P_WASTE (1 << 15)
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+#define IPP2P_XDCC (1 << 16)
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--- /dev/null
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+++ b/net/ipv4/netfilter/ipt_ipp2p.c
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@@ -0,0 +1,856 @@
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+#if defined(MODVERSIONS)
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+#include <linux/modversions.h>
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+#endif
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+#include <linux/module.h>
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+#include <linux/netfilter_ipv4/ip_tables.h>
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+#include <linux/version.h>
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+#include <linux/netfilter_ipv4/ipt_ipp2p.h>
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+#include <net/tcp.h>
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+#include <net/udp.h>
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+
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+#define get_u8(X,O) (*(__u8 *)(X + O))
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+#define get_u16(X,O) (*(__u16 *)(X + O))
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+#define get_u32(X,O) (*(__u32 *)(X + O))
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+
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+MODULE_AUTHOR("Eicke Friedrich/Klaus Degner <ipp2p@ipp2p.org>");
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+MODULE_DESCRIPTION("An extension to iptables to identify P2P traffic.");
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+MODULE_LICENSE("GPL");
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+
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+
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+/*Search for UDP eDonkey/eMule/Kad commands*/
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+int
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+udp_search_edk (unsigned char *haystack, int packet_len)
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+{
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+ unsigned char *t = haystack;
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+ t += 8;
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+
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+ switch (t[0]) {
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+ case 0xe3:
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+ { /*edonkey*/
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+ switch (t[1])
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+ {
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+ /* client -> server status request */
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+ case 0x96:
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+ if (packet_len == 14) return ((IPP2P_EDK * 100) + 50);
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+ break;
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+ /* server -> client status request */
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+ case 0x97: if (packet_len == 42) return ((IPP2P_EDK * 100) + 51);
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+ break;
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+ /* server description request */
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+ /* e3 2a ff f0 .. | size == 6 */
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+ case 0xa2: if ( (packet_len == 14) && ( get_u16(t,2) == __constant_htons(0xfff0) ) ) return ((IPP2P_EDK * 100) + 52);
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+ break;
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+ /* server description response */
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+ /* e3 a3 ff f0 .. | size > 40 && size < 200 */
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+ //case 0xa3: return ((IPP2P_EDK * 100) + 53);
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+ // break;
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+ case 0x9a: if (packet_len==26) return ((IPP2P_EDK * 100) + 54);
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+ break;
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+
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+ case 0x92: if (packet_len==18) return ((IPP2P_EDK * 100) + 55);
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+ break;
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+ }
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+ break;
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+ }
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+ case 0xe4:
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+ {
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+ switch (t[1])
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+ {
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+ /* e4 20 .. | size == 43 */
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+ case 0x20: if ((packet_len == 43) && (t[2] != 0x00) && (t[34] != 0x00)) return ((IPP2P_EDK * 100) + 60);
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+ break;
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+ /* e4 00 .. 00 | size == 35 ? */
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+ case 0x00: if ((packet_len == 35) && (t[26] == 0x00)) return ((IPP2P_EDK * 100) + 61);
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+ break;
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+ /* e4 10 .. 00 | size == 35 ? */
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+ case 0x10: if ((packet_len == 35) && (t[26] == 0x00)) return ((IPP2P_EDK * 100) + 62);
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+ break;
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+ /* e4 18 .. 00 | size == 35 ? */
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+ case 0x18: if ((packet_len == 35) && (t[26] == 0x00)) return ((IPP2P_EDK * 100) + 63);
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+ break;
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+ /* e4 52 .. | size = 44 */
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+ case 0x52: if (packet_len == 44 ) return ((IPP2P_EDK * 100) + 64);
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+ break;
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+ /* e4 58 .. | size == 6 */
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+ case 0x58: if (packet_len == 14 ) return ((IPP2P_EDK * 100) + 65);
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+ break;
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+ /* e4 59 .. | size == 2 */
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+ case 0x59: if (packet_len == 10 )return ((IPP2P_EDK * 100) + 66);
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+ break;
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+ /* e4 28 .. | packet_len == 52,77,102,127... */
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+ case 0x28: if (((packet_len-52) % 25) == 0) return ((IPP2P_EDK * 100) + 67);
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+ break;
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+ /* e4 50 xx xx | size == 4 */
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+ case 0x50: if (packet_len == 12) return ((IPP2P_EDK * 100) + 68);
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+ break;
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+ /* e4 40 xx xx | size == 48 */
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+ case 0x40: if (packet_len == 56) return ((IPP2P_EDK * 100) + 69);
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+ break;
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+ }
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+ break;
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+ }
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+ } /* end of switch (t[0]) */
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+ return 0;
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+}/*udp_search_edk*/
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+
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+
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+/*Search for UDP Gnutella commands*/
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+int
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+udp_search_gnu (unsigned char *haystack, int packet_len)
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+{
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+ unsigned char *t = haystack;
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+ t += 8;
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+
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+ if (memcmp(t, "GND", 3) == 0) return ((IPP2P_GNU * 100) + 51);
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+ if (memcmp(t, "GNUTELLA ", 9) == 0) return ((IPP2P_GNU * 100) + 52);
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+ return 0;
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+}/*udp_search_gnu*/
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+
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+
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+/*Search for UDP KaZaA commands*/
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+int
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+udp_search_kazaa (unsigned char *haystack, int packet_len)
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+{
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+ unsigned char *t = haystack;
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+
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+ if (t[packet_len-1] == 0x00){
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+ t += (packet_len - 6);
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+ if (memcmp(t, "KaZaA", 5) == 0) return (IPP2P_KAZAA * 100 +50);
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+ }
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+
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+ return 0;
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+}/*udp_search_kazaa*/
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+
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+/*Search for UDP DirectConnect commands*/
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+int
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+udp_search_directconnect (unsigned char *haystack, int packet_len)
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+{
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+ unsigned char *t = haystack;
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+ if ((*(t + 8) == 0x24) && (*(t + packet_len - 1) == 0x7c)) {
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+ t+=8;
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+ if (memcmp(t, "SR ", 3) == 0) return ((IPP2P_DC * 100) + 60);
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+ if (memcmp(t, "Ping ", 5) == 0) return ((IPP2P_DC * 100) + 61);
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+ }
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+ return 0;
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+}/*udp_search_directconnect*/
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+
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+
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+
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+/*Search for UDP BitTorrent commands*/
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+int
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+udp_search_bit (unsigned char *haystack, int packet_len)
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+{
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+ switch(packet_len)
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+ {
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+ case 24:
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+ /* ^ 00 00 04 17 27 10 19 80 */
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+ if ((ntohl(get_u32(haystack, 8)) == 0x00000417) && (ntohl(get_u32(haystack, 12)) == 0x27101980))
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+ return (IPP2P_BIT * 100 + 50);
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+ break;
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+ case 44:
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+ if (get_u32(haystack, 16) == __constant_htonl(0x00000400) && get_u32(haystack, 36) == __constant_htonl(0x00000104))
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+ return (IPP2P_BIT * 100 + 51);
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+ if (get_u32(haystack, 16) == __constant_htonl(0x00000400))
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+ return (IPP2P_BIT * 100 + 61);
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+ break;
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+ case 65:
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+ if (get_u32(haystack, 16) == __constant_htonl(0x00000404) && get_u32(haystack, 36) == __constant_htonl(0x00000104))
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+ return (IPP2P_BIT * 100 + 52);
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+ if (get_u32(haystack, 16) == __constant_htonl(0x00000404))
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+ return (IPP2P_BIT * 100 + 62);
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+ break;
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+ case 67:
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+ if (get_u32(haystack, 16) == __constant_htonl(0x00000406) && get_u32(haystack, 36) == __constant_htonl(0x00000104))
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+ return (IPP2P_BIT * 100 + 53);
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+ if (get_u32(haystack, 16) == __constant_htonl(0x00000406))
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+ return (IPP2P_BIT * 100 + 63);
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+ break;
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+ case 211:
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+ if (get_u32(haystack, 8) == __constant_htonl(0x00000405))
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+ return (IPP2P_BIT * 100 + 54);
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+ break;
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+ case 29:
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+ if ((get_u32(haystack, 8) == __constant_htonl(0x00000401)))
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+ return (IPP2P_BIT * 100 + 55);
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+ break;
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+ case 52:
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+ if (get_u32(haystack,8) == __constant_htonl(0x00000827) &&
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+ get_u32(haystack,12) == __constant_htonl(0x37502950))
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+ return (IPP2P_BIT * 100 + 80);
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+ break;
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+ default:
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+ /* this packet does not have a constant size */
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+ if (packet_len >= 40 && get_u32(haystack, 16) == __constant_htonl(0x00000402) && get_u32(haystack, 36) == __constant_htonl(0x00000104))
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+ return (IPP2P_BIT * 100 + 56);
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+ break;
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+ }
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+
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+ /* some extra-bitcomet rules:
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+ * "d1:" [a|r] "d2:id20:"
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+ */
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+ if (packet_len > 30 && get_u8(haystack, 8) == 'd' && get_u8(haystack, 9) == '1' && get_u8(haystack, 10) == ':' )
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+ {
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+ if (get_u8(haystack, 11) == 'a' || get_u8(haystack, 11) == 'r')
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+ {
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+ if (memcmp(haystack+12,"d2:id20:",8)==0)
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+ return (IPP2P_BIT * 100 + 57);
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+ }
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+ }
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+
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+#if 0
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+ /* bitlord rules */
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+ /* packetlen must be bigger than 40 */
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+ /* first 4 bytes are zero */
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+ if (packet_len > 40 && get_u32(haystack, 8) == 0x00000000)
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+ {
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+ /* first rule: 00 00 00 00 01 00 00 xx xx xx xx 00 00 00 00*/
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+ if (get_u32(haystack, 12) == 0x00000000 &&
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+ get_u32(haystack, 16) == 0x00010000 &&
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+ get_u32(haystack, 24) == 0x00000000 )
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+ return (IPP2P_BIT * 100 + 71);
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+
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+ /* 00 01 00 00 0d 00 00 xx xx xx xx 00 00 00 00*/
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+ if (get_u32(haystack, 12) == 0x00000001 &&
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+ get_u32(haystack, 16) == 0x000d0000 &&
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+ get_u32(haystack, 24) == 0x00000000 )
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+ return (IPP2P_BIT * 100 + 71);
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+
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+
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+ }
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+#endif
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+
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+ return 0;
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+}/*udp_search_bit*/
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+
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+
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+
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+/*Search for Ares commands*/
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+//#define IPP2P_DEBUG_ARES
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+int
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+search_ares (const unsigned char *payload, const u16 plen)
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+//int search_ares (unsigned char *haystack, int packet_len, int head_len)
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+{
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+// const unsigned char *t = haystack + head_len;
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+
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+ /* all ares packets start with */
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+ if (payload[1] == 0 && (plen - payload[0]) == 3)
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+ {
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+ switch (payload[2])
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+ {
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+ case 0x5a:
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+ /* ares connect */
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+ if ( plen == 6 && payload[5] == 0x05 ) return ((IPP2P_ARES * 100) + 1);
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+ break;
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+ case 0x09:
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+ /* ares search, min 3 chars --> 14 bytes
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+ * lets define a search can be up to 30 chars --> max 34 bytes
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+ */
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+ if ( plen >= 14 && plen <= 34 ) return ((IPP2P_ARES * 100) + 1);
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+ break;
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+#ifdef IPP2P_DEBUG_ARES
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+ default:
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+ printk(KERN_DEBUG "Unknown Ares command %x recognized, len: %u \n", (unsigned int) payload[2],plen);
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+#endif /* IPP2P_DEBUG_ARES */
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+ }
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+ }
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+
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+#if 0
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+ /* found connect packet: 03 00 5a 04 03 05 */
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+ /* new version ares 1.8: 03 00 5a xx xx 05 */
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+ if ((plen) == 6){ /* possible connect command*/
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+ if ((payload[0] == 0x03) && (payload[1] == 0x00) && (payload[2] == 0x5a) && (payload[5] == 0x05))
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+ return ((IPP2P_ARES * 100) + 1);
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+ }
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+ if ((plen) == 60){ /* possible download command*/
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+ if ((payload[59] == 0x0a) && (payload[58] == 0x0a)){
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+ if (memcmp(t, "PUSH SHA1:", 10) == 0) /* found download command */
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+ return ((IPP2P_ARES * 100) + 2);
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+ }
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+ }
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+#endif
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+
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+ return 0;
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+} /*search_ares*/
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+
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+/*Search for SoulSeek commands*/
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+int
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+search_soul (const unsigned char *payload, const u16 plen)
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+{
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+//#define IPP2P_DEBUG_SOUL
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+ /* match: xx xx xx xx | xx = sizeof(payload) - 4 */
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+ if (get_u32(payload, 0) == (plen - 4)){
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+ const __u32 m=get_u32(payload, 4);
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+ /* match 00 yy yy 00, yy can be everything */
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+ if ( get_u8(payload, 4) == 0x00 && get_u8(payload, 7) == 0x00 )
|
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+ {
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+#ifdef IPP2P_DEBUG_SOUL
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+ printk(KERN_DEBUG "0: Soulseek command 0x%x recognized\n",get_u32(payload, 4));
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+#endif /* IPP2P_DEBUG_SOUL */
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+ return ((IPP2P_SOUL * 100) + 1);
|
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+ }
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+
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+ /* next match: 01 yy 00 00 | yy can be everything */
|
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+ if ( get_u8(payload, 4) == 0x01 && get_u16(payload, 6) == 0x0000 )
|
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+ {
|
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+#ifdef IPP2P_DEBUG_SOUL
|
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+ printk(KERN_DEBUG "1: Soulseek command 0x%x recognized\n",get_u16(payload, 4));
|
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+#endif /* IPP2P_DEBUG_SOUL */
|
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+ return ((IPP2P_SOUL * 100) + 2);
|
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+ }
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||||
+
|
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+ /* 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 */
|
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+ /* get all small commandos */
|
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+ switch(m)
|
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+ {
|
||||
+ case 7:
|
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+ case 9:
|
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+ case 22:
|
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+ case 23:
|
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+ case 26:
|
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+ case 28:
|
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+ case 50:
|
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+ case 51:
|
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+ case 60:
|
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+ case 91:
|
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+ case 92:
|
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+ case 1001:
|
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+#ifdef IPP2P_DEBUG_SOUL
|
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+ printk(KERN_DEBUG "2: Soulseek command 0x%x recognized\n",get_u16(payload, 4));
|
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+#endif /* IPP2P_DEBUG_SOUL */
|
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+ return ((IPP2P_SOUL * 100) + 3);
|
||||
+ }
|
||||
+
|
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+ if (m > 0 && m < 6 )
|
||||
+ {
|
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+#ifdef IPP2P_DEBUG_SOUL
|
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+ printk(KERN_DEBUG "3: Soulseek command 0x%x recognized\n",get_u16(payload, 4));
|
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+#endif /* IPP2P_DEBUG_SOUL */
|
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+ return ((IPP2P_SOUL * 100) + 4);
|
||||
+ }
|
||||
+ if (m > 12 && m < 19 )
|
||||
+ {
|
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+#ifdef IPP2P_DEBUG_SOUL
|
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+ printk(KERN_DEBUG "4: Soulseek command 0x%x recognized\n",get_u16(payload, 4));
|
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+#endif /* IPP2P_DEBUG_SOUL */
|
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+ return ((IPP2P_SOUL * 100) + 5);
|
||||
+ }
|
||||
+
|
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+ if (m > 34 && m < 38 )
|
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+ {
|
||||
+#ifdef IPP2P_DEBUG_SOUL
|
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+ printk(KERN_DEBUG "5: Soulseek command 0x%x recognized\n",get_u16(payload, 4));
|
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+#endif /* IPP2P_DEBUG_SOUL */
|
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+ return ((IPP2P_SOUL * 100) + 6);
|
||||
+ }
|
||||
+
|
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+ if (m > 39 && m < 47 )
|
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+ {
|
||||
+#ifdef IPP2P_DEBUG_SOUL
|
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+ printk(KERN_DEBUG "6: Soulseek command 0x%x recognized\n",get_u16(payload, 4));
|
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+#endif /* IPP2P_DEBUG_SOUL */
|
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+ 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 bool
|
||||
+match(const struct sk_buff *skb,
|
||||
+ const struct net_device *in,
|
||||
+ const struct net_device *out,
|
||||
+ const struct xt_match *match,
|
||||
+ const void *matchinfo,
|
||||
+ int offset,
|
||||
+ unsigned int protoff,
|
||||
+ bool *hotdrop)
|
||||
+{
|
||||
+ const struct ipt_p2p_info *info = matchinfo;
|
||||
+ unsigned char *haystack;
|
||||
+ struct iphdr *ip = ip_hdr(skb);
|
||||
+ 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 bool
|
||||
+checkentry(const char *tablename,
|
||||
+ const void *ip,
|
||||
+ const struct xt_match *match,
|
||||
+ void *matchinfo,
|
||||
+ 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 = {
|
||||
+ .name = "ipp2p",
|
||||
+ .match = &match,
|
||||
+ .family = AF_INET,
|
||||
+ .matchsize = sizeof(struct ipt_p2p_info),
|
||||
+ .checkentry = &checkentry,
|
||||
+ .me = THIS_MODULE,
|
||||
+};
|
||||
+
|
||||
+
|
||||
+static int __init init(void)
|
||||
+{
|
||||
+ printk(KERN_INFO "IPP2P v%s loading\n", IPP2P_VERSION);
|
||||
+ return xt_register_match(&ipp2p_match);
|
||||
+}
|
||||
+
|
||||
+static void __exit fini(void)
|
||||
+{
|
||||
+ xt_unregister_match(&ipp2p_match);
|
||||
+ printk(KERN_INFO "IPP2P v%s unloaded\n", IPP2P_VERSION);
|
||||
+}
|
||||
+
|
||||
+module_init(init);
|
||||
+module_exit(fini);
|
||||
+
|
||||
+
|
||||
--- a/net/ipv4/netfilter/Kconfig
|
||||
+++ b/net/ipv4/netfilter/Kconfig
|
||||
@@ -57,6 +57,12 @@ config IP_NF_IPTABLES
|
||||
To compile it as a module, choose M here. If unsure, say N.
|
||||
|
||||
# The matches.
|
||||
+config IP_NF_MATCH_IPP2P
|
||||
+ tristate "IPP2P"
|
||||
+ depends on IP_NF_IPTABLES
|
||||
+ help
|
||||
+ Module for matching traffic of various Peer-to-Peer applications
|
||||
+
|
||||
config IP_NF_MATCH_RECENT
|
||||
tristate '"recent" match support'
|
||||
depends on IP_NF_IPTABLES
|
||||
--- a/net/ipv4/netfilter/Makefile
|
||||
+++ b/net/ipv4/netfilter/Makefile
|
||||
@@ -51,6 +51,8 @@ obj-$(CONFIG_IP_NF_MATCH_ECN) += ipt_ecn
|
||||
obj-$(CONFIG_IP_NF_MATCH_RECENT) += ipt_recent.o
|
||||
obj-$(CONFIG_IP_NF_MATCH_TTL) += ipt_ttl.o
|
||||
|
||||
+obj-$(CONFIG_IP_NF_MATCH_IPP2P) += ipt_ipp2p.o
|
||||
+
|
||||
# targets
|
||||
obj-$(CONFIG_IP_NF_TARGET_CLUSTERIP) += ipt_CLUSTERIP.o
|
||||
obj-$(CONFIG_IP_NF_TARGET_ECN) += ipt_ECN.o
|
||||
@ -7534,7 +7534,7 @@
|
||||
+module_exit(ipt_SET_fini);
|
||||
--- a/net/ipv4/netfilter/Kconfig
|
||||
+++ b/net/ipv4/netfilter/Kconfig
|
||||
@@ -412,5 +412,122 @@ config IP_NF_ARP_MANGLE
|
||||
@@ -406,5 +406,122 @@ config IP_NF_ARP_MANGLE
|
||||
Allows altering the ARP packet payload: source and destination
|
||||
hardware and network addresses.
|
||||
|
||||
@ -7665,9 +7665,9 @@
|
||||
obj-$(CONFIG_IP_NF_MATCH_TTL) += ipt_ttl.o
|
||||
+obj-$(CONFIG_IP_NF_MATCH_SET) += ipt_set.o
|
||||
|
||||
obj-$(CONFIG_IP_NF_MATCH_IPP2P) += ipt_ipp2p.o
|
||||
|
||||
@@ -63,6 +64,18 @@ obj-$(CONFIG_IP_NF_TARGET_REDIRECT) += i
|
||||
# targets
|
||||
obj-$(CONFIG_IP_NF_TARGET_CLUSTERIP) += ipt_CLUSTERIP.o
|
||||
@@ -61,6 +62,18 @@ obj-$(CONFIG_IP_NF_TARGET_REDIRECT) += i
|
||||
obj-$(CONFIG_IP_NF_TARGET_REJECT) += ipt_REJECT.o
|
||||
obj-$(CONFIG_IP_NF_TARGET_TTL) += ipt_TTL.o
|
||||
obj-$(CONFIG_IP_NF_TARGET_ULOG) += ipt_ULOG.o
|
||||
|
||||
@ -1,239 +0,0 @@
|
||||
--- /dev/null
|
||||
+++ b/include/linux/netfilter_ipv4/ipt_time.h
|
||||
@@ -0,0 +1,18 @@
|
||||
+#ifndef __ipt_time_h_included__
|
||||
+#define __ipt_time_h_included__
|
||||
+
|
||||
+
|
||||
+struct ipt_time_info {
|
||||
+ u_int8_t days_match; /* 1 bit per day. -SMTWTFS */
|
||||
+ u_int16_t time_start; /* 0 < time_start < 23*60+59 = 1439 */
|
||||
+ u_int16_t time_stop; /* 0:0 < time_stat < 23:59 */
|
||||
+
|
||||
+ /* FIXME: Keep this one for userspace iptables binary compability: */
|
||||
+ u_int8_t kerneltime; /* ignore skb time (and use kerneltime) or not. */
|
||||
+
|
||||
+ time_t date_start;
|
||||
+ time_t date_stop;
|
||||
+};
|
||||
+
|
||||
+
|
||||
+#endif /* __ipt_time_h_included__ */
|
||||
--- /dev/null
|
||||
+++ b/net/ipv4/netfilter/ipt_time.c
|
||||
@@ -0,0 +1,180 @@
|
||||
+/*
|
||||
+ This is a module which is used for time matching
|
||||
+ It is using some modified code from dietlibc (localtime() function)
|
||||
+ that you can find at http://www.fefe.de/dietlibc/
|
||||
+ This file is distributed under the terms of the GNU General Public
|
||||
+ License (GPL). Copies of the GPL can be obtained from: ftp://prep.ai.mit.edu/pub/gnu/GPL
|
||||
+ 2001-05-04 Fabrice MARIE <fabrice@netfilter.org> : initial development.
|
||||
+ 2001-21-05 Fabrice MARIE <fabrice@netfilter.org> : bug fix in the match code,
|
||||
+ thanks to "Zeng Yu" <zengy@capitel.com.cn> for bug report.
|
||||
+ 2001-26-09 Fabrice MARIE <fabrice@netfilter.org> : force the match to be in LOCAL_IN or PRE_ROUTING only.
|
||||
+ 2001-30-11 Fabrice : added the possibility to use the match in FORWARD/OUTPUT with a little hack,
|
||||
+ added Nguyen Dang Phuoc Dong <dongnd@tlnet.com.vn> patch to support timezones.
|
||||
+ 2004-05-02 Fabrice : added support for date matching, from an idea of Fabien COELHO.
|
||||
+*/
|
||||
+
|
||||
+#include <linux/module.h>
|
||||
+#include <linux/skbuff.h>
|
||||
+#include <linux/netfilter_ipv4/ip_tables.h>
|
||||
+#include <linux/netfilter_ipv4/ipt_time.h>
|
||||
+#include <linux/time.h>
|
||||
+
|
||||
+MODULE_AUTHOR("Fabrice MARIE <fabrice@netfilter.org>");
|
||||
+MODULE_DESCRIPTION("Match arrival timestamp/date");
|
||||
+MODULE_LICENSE("GPL");
|
||||
+
|
||||
+struct tm
|
||||
+{
|
||||
+ int tm_sec; /* Seconds. [0-60] (1 leap second) */
|
||||
+ int tm_min; /* Minutes. [0-59] */
|
||||
+ int tm_hour; /* Hours. [0-23] */
|
||||
+ int tm_mday; /* Day. [1-31] */
|
||||
+ int tm_mon; /* Month. [0-11] */
|
||||
+ int tm_year; /* Year - 1900. */
|
||||
+ int tm_wday; /* Day of week. [0-6] */
|
||||
+ int tm_yday; /* Days in year.[0-365] */
|
||||
+ int tm_isdst; /* DST. [-1/0/1]*/
|
||||
+
|
||||
+ long int tm_gmtoff; /* we don't care, we count from GMT */
|
||||
+ const char *tm_zone; /* we don't care, we count from GMT */
|
||||
+};
|
||||
+
|
||||
+void
|
||||
+localtime(const u32 time, struct tm *r);
|
||||
+
|
||||
+static bool
|
||||
+match(const struct sk_buff *skb,
|
||||
+ const struct net_device *in,
|
||||
+ const struct net_device *out,
|
||||
+ const struct xt_match *match,
|
||||
+ const void *matchinfo,
|
||||
+ int offset,
|
||||
+ unsigned int protoff,
|
||||
+ bool *hotdrop)
|
||||
+{
|
||||
+ const struct ipt_time_info *info = matchinfo; /* match info for rule */
|
||||
+ struct timeval tv;
|
||||
+ struct tm currenttime; /* time human readable */
|
||||
+ u_int8_t days_of_week[7] = {64, 32, 16, 8, 4, 2, 1};
|
||||
+ u_int16_t packet_time;
|
||||
+
|
||||
+ /* We might not have a timestamp, get one */
|
||||
+ if (skb->tstamp.tv64 == 0)
|
||||
+ __net_timestamp((struct sk_buff *)skb);
|
||||
+
|
||||
+ skb_get_timestamp(skb, &tv);
|
||||
+ /* First we make sure we are in the date start-stop boundaries */
|
||||
+ if ((tv.tv_sec < info->date_start) || (tv.tv_sec > info->date_stop))
|
||||
+ return 0; /* We are outside the date boundaries */
|
||||
+
|
||||
+ /* Transform the timestamp of the packet, in a human readable form */
|
||||
+ localtime(tv.tv_sec, ¤ttime);
|
||||
+
|
||||
+ /* check if we match this timestamp, we start by the days... */
|
||||
+ if ((days_of_week[currenttime.tm_wday] & info->days_match) != days_of_week[currenttime.tm_wday])
|
||||
+ return 0; /* the day doesn't match */
|
||||
+
|
||||
+ /* ... check the time now */
|
||||
+ packet_time = (currenttime.tm_hour * 60) + currenttime.tm_min;
|
||||
+ if ((packet_time < info->time_start) || (packet_time > info->time_stop))
|
||||
+ return 0;
|
||||
+
|
||||
+ /* here we match ! */
|
||||
+ return 1;
|
||||
+}
|
||||
+
|
||||
+static bool
|
||||
+checkentry(const char *tablename,
|
||||
+ const void *ip,
|
||||
+ const struct xt_match *match,
|
||||
+ void *matchinfo,
|
||||
+ unsigned int hook_mask)
|
||||
+{
|
||||
+ struct ipt_time_info *info = matchinfo; /* match info for rule */
|
||||
+
|
||||
+ /* First, check that we are in the correct hooks */
|
||||
+ if (hook_mask
|
||||
+ & ~((1 << NF_INET_PRE_ROUTING) | (1 << NF_INET_LOCAL_IN) | (1 << NF_INET_FORWARD) | (1 << NF_INET_LOCAL_OUT)))
|
||||
+ {
|
||||
+ printk("ipt_time: error, only valid for PRE_ROUTING, LOCAL_IN, FORWARD and OUTPUT)\n");
|
||||
+ return 0;
|
||||
+ }
|
||||
+
|
||||
+ /* Now check the coherence of the data ... */
|
||||
+ if ((info->time_start > 1439) || /* 23*60+59 = 1439*/
|
||||
+ (info->time_stop > 1439))
|
||||
+ {
|
||||
+ printk(KERN_WARNING "ipt_time: invalid argument\n");
|
||||
+ return 0;
|
||||
+ }
|
||||
+
|
||||
+ return 1;
|
||||
+}
|
||||
+
|
||||
+static struct ipt_match time_match = {
|
||||
+ .name = "time",
|
||||
+ .match = &match,
|
||||
+ .matchsize = sizeof(struct ipt_time_info),
|
||||
+ .checkentry = &checkentry,
|
||||
+ .me = THIS_MODULE
|
||||
+};
|
||||
+
|
||||
+static int __init init(void)
|
||||
+{
|
||||
+ printk("ipt_time loading\n");
|
||||
+ return xt_register_match(&time_match);
|
||||
+}
|
||||
+
|
||||
+static void __exit fini(void)
|
||||
+{
|
||||
+ xt_unregister_match(&time_match);
|
||||
+ printk("ipt_time unloaded\n");
|
||||
+}
|
||||
+
|
||||
+module_init(init);
|
||||
+module_exit(fini);
|
||||
+
|
||||
+
|
||||
+/* The part below is borowed and modified from dietlibc */
|
||||
+
|
||||
+/* seconds per day */
|
||||
+#define SPD 24*60*60
|
||||
+
|
||||
+void
|
||||
+localtime(const u32 time, struct tm *r) {
|
||||
+ u32 i, timep;
|
||||
+ extern struct timezone sys_tz;
|
||||
+ const unsigned int __spm[12] =
|
||||
+ { 0,
|
||||
+ (31),
|
||||
+ (31+28),
|
||||
+ (31+28+31),
|
||||
+ (31+28+31+30),
|
||||
+ (31+28+31+30+31),
|
||||
+ (31+28+31+30+31+30),
|
||||
+ (31+28+31+30+31+30+31),
|
||||
+ (31+28+31+30+31+30+31+31),
|
||||
+ (31+28+31+30+31+30+31+31+30),
|
||||
+ (31+28+31+30+31+30+31+31+30+31),
|
||||
+ (31+28+31+30+31+30+31+31+30+31+30),
|
||||
+ };
|
||||
+ register u32 work;
|
||||
+
|
||||
+ timep = time - (sys_tz.tz_minuteswest * 60);
|
||||
+ work=timep%(SPD);
|
||||
+ r->tm_sec=work%60; work/=60;
|
||||
+ r->tm_min=work%60; r->tm_hour=work/60;
|
||||
+ work=timep/(SPD);
|
||||
+ r->tm_wday=(4+work)%7;
|
||||
+ for (i=1970; ; ++i) {
|
||||
+ register time_t k= (!(i%4) && ((i%100) || !(i%400)))?366:365;
|
||||
+ if (work>k)
|
||||
+ work-=k;
|
||||
+ else
|
||||
+ break;
|
||||
+ }
|
||||
+ r->tm_year=i-1900;
|
||||
+ for (i=11; i && __spm[i]>work; --i) ;
|
||||
+ r->tm_mon=i;
|
||||
+ r->tm_mday=work-__spm[i]+1;
|
||||
+}
|
||||
--- a/net/ipv4/netfilter/Kconfig
|
||||
+++ b/net/ipv4/netfilter/Kconfig
|
||||
@@ -63,6 +63,22 @@ config IP_NF_MATCH_IPP2P
|
||||
help
|
||||
Module for matching traffic of various Peer-to-Peer applications
|
||||
|
||||
+
|
||||
+config IP_NF_MATCH_TIME
|
||||
+ tristate 'TIME match support'
|
||||
+ depends on IP_NF_IPTABLES
|
||||
+ help
|
||||
+ This option adds a `time' match, which allows you
|
||||
+ to match based on the packet arrival time/date
|
||||
+ (arrival time/date at the machine which netfilter is running on) or
|
||||
+ departure time/date (for locally generated packets).
|
||||
+
|
||||
+ If you say Y here, try iptables -m time --help for more information.
|
||||
+ If you want to compile it as a module, say M here and read
|
||||
+
|
||||
+ Documentation/modules.txt. If unsure, say `N'.
|
||||
+
|
||||
+
|
||||
config IP_NF_MATCH_RECENT
|
||||
tristate '"recent" match support'
|
||||
depends on IP_NF_IPTABLES
|
||||
--- a/net/ipv4/netfilter/Makefile
|
||||
+++ b/net/ipv4/netfilter/Makefile
|
||||
@@ -51,6 +51,7 @@ obj-$(CONFIG_IP_NF_MATCH_ECN) += ipt_ecn
|
||||
obj-$(CONFIG_IP_NF_MATCH_RECENT) += ipt_recent.o
|
||||
obj-$(CONFIG_IP_NF_MATCH_TTL) += ipt_ttl.o
|
||||
obj-$(CONFIG_IP_NF_MATCH_SET) += ipt_set.o
|
||||
+obj-$(CONFIG_IP_NF_MATCH_TIME) += ipt_time.o
|
||||
|
||||
obj-$(CONFIG_IP_NF_MATCH_IPP2P) += ipt_ipp2p.o
|
||||
|
||||
@ -774,7 +774,7 @@
|
||||
+MODULE_LICENSE("GPL");
|
||||
--- a/net/ipv4/netfilter/Kconfig
|
||||
+++ b/net/ipv4/netfilter/Kconfig
|
||||
@@ -145,6 +145,17 @@ config IP_NF_FILTER
|
||||
@@ -123,6 +123,17 @@ config IP_NF_FILTER
|
||||
|
||||
To compile it as a module, choose M here. If unsure, say N.
|
||||
|
||||
@ -794,7 +794,7 @@
|
||||
depends on IP_NF_FILTER
|
||||
--- a/net/ipv4/netfilter/Makefile
|
||||
+++ b/net/ipv4/netfilter/Makefile
|
||||
@@ -59,6 +59,7 @@ obj-$(CONFIG_IP_NF_MATCH_IPP2P) += ipt_i
|
||||
@@ -56,6 +56,7 @@ obj-$(CONFIG_IP_NF_MATCH_SET) += ipt_set
|
||||
obj-$(CONFIG_IP_NF_TARGET_CLUSTERIP) += ipt_CLUSTERIP.o
|
||||
obj-$(CONFIG_IP_NF_TARGET_ECN) += ipt_ECN.o
|
||||
obj-$(CONFIG_IP_NF_TARGET_LOG) += ipt_LOG.o
|
||||
|
||||
@ -333,7 +333,7 @@
|
||||
obj-$(CONFIG_NETFILTER_XTABLES) += x_tables.o xt_tcpudp.o
|
||||
--- a/net/ipv4/netfilter/Kconfig
|
||||
+++ b/net/ipv4/netfilter/Kconfig
|
||||
@@ -303,6 +303,11 @@ config NF_NAT_IRC
|
||||
@@ -281,6 +281,11 @@ config NF_NAT_IRC
|
||||
depends on IP_NF_IPTABLES && NF_CONNTRACK && NF_NAT
|
||||
default NF_NAT && NF_CONNTRACK_IRC
|
||||
|
||||
|
||||
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Block a user