From c237fe24863dacaf2aecb33322e1098ab8387730 Mon Sep 17 00:00:00 2001 From: Jan Engelhardt Date: Wed, 26 Mar 2008 06:53:08 +0100 Subject: [PATCH] ipp2p: adhere to codingstyle --- extensions/libxt_ipp2p.c | 576 ++++++++-------- extensions/xt_ipp2p.c | 1379 ++++++++++++++++++++------------------ 2 files changed, 1034 insertions(+), 921 deletions(-) diff --git a/extensions/libxt_ipp2p.c b/extensions/libxt_ipp2p.c index 98263a0..42023a0 100644 --- a/extensions/libxt_ipp2p.c +++ b/extensions/libxt_ipp2p.c @@ -7,358 +7,398 @@ #include #include "xt_ipp2p.h" -static void -help(void) +static void ipp2p_mt_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); + 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' }, +static struct option ipp2p_mt_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' }, + { "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} + {0}, }; -static int -parse(int c, char **argv, int invert, unsigned int *flags, - const void *entry, - struct xt_entry_match **match) +static int ipp2p_mt_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) { + 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, + 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, +/* 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, + 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; - + 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, + 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, + 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, +/* 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; + 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, + 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, +/* 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; + 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, + 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, + 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; + 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, + 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, + 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; + 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, + 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; + 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, + 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; + 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, + 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; + 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, + 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; + 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, + 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; - + 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; + 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; + 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; + 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; + 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; +// exit_error(PARAMETER_PROBLEM, +// "\nipp2p-parameter problem: for ipp2p usage type: iptables -m ipp2p --help\n"); + return 0; + } + return 1; +} + +static void ipp2p_mt_check(unsigned int flags) +{ + if (!flags) + exit_error(PARAMETER_PROBLEM, + "\nipp2p-parameter problem: for ipp2p usage type: iptables -m ipp2p --help\n"); } static void -final_check(unsigned int flags) +ipp2p_mt_print(const void *entry, const struct xt_entry_match *match, + int numeric) { - if (!flags) - exit_error(PARAMETER_PROBLEM, - "\nipp2p-parameter problem: for ipp2p usage type: iptables -m ipp2p --help\n"); + 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 -print(const void *ip, - const struct xt_entry_match *match, - int numeric) +static void ipp2p_mt_save(const void *entry, const struct xt_entry_match *match) { - 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 "); + 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= -{ - .name = "ipp2p", - .version = XTABLES_VERSION, - .size = XT_ALIGN(sizeof(struct ipt_p2p_info)), - .userspacesize = XT_ALIGN(sizeof(struct ipt_p2p_info)), - .help = &help, - .parse = &parse, - .final_check = &final_check, - .print = &print, - .save = &save, - .extra_opts = opts +static struct xtables_match ipp2p_mt_reg = { + .version = XTABLES_VERSION, + .name = "ipp2p", + .revision = 0, + .family = AF_INET, + .size = XT_ALIGN(sizeof(struct ipt_p2p_info)), + .userspacesize = XT_ALIGN(sizeof(struct ipt_p2p_info)), + .help = ipp2p_mt_help, + .parse = ipp2p_mt_parse, + .final_check = ipp2p_mt_check, + .print = ipp2p_mt_print, + .save = ipp2p_mt_save, + .extra_opts = ipp2p_mt_opts, }; - + void _init(void) { - xtables_register_match(&ipp2p); + xtables_register_match(&ipp2p_mt_reg); } diff --git a/extensions/xt_ipp2p.c b/extensions/xt_ipp2p.c index 7584241..575792d 100644 --- a/extensions/xt_ipp2p.c +++ b/extensions/xt_ipp2p.c @@ -6,289 +6,336 @@ #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)) +//#define IPP2P_DEBUG_ARES +//#define IPP2P_DEBUG_SOUL +//#define IPP2P_DEBUG_WINMX + +#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 "); 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) +/* Search for UDP eDonkey/eMule/Kad commands */ +int udp_search_edk(unsigned char *haystack, int packet_len) { - unsigned char *t = haystack; - t += 8; + 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 0xe3: + /* edonkey */ + switch (t[1]) { + /* client -> server status request */ + case 0x96: + if (packet_len == 14) + return IPP2P_EDK * 100 + 50; + break; - case 0x92: if (packet_len==18) return ((IPP2P_EDK * 100) + 55); - 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; } - 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; + + 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; } - } /* 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; + 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); - } + return 0; +} + +/* 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; +} + +/* 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; +} + +/* 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; +} + +/* 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) - { + 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 && + if (get_u32(haystack, 12) == 0x00000000 && get_u32(haystack, 16) == 0x00010000 && - get_u32(haystack, 24) == 0x00000000 ) - return (IPP2P_BIT * 100 + 71); - + 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 && + if (get_u32(haystack, 12) == 0x00000001 && get_u32(haystack, 16) == 0x000d0000 && - get_u32(haystack, 24) == 0x00000000 ) - return (IPP2P_BIT * 100 + 71); + get_u32(haystack, 24) == 0x00000000) + return IPP2P_BIT * 100 + 71; } #endif - return 0; -}/*udp_search_bit*/ + return 0; +} -/*Search for Ares commands*/ -//#define IPP2P_DEBUG_ARES -int -search_ares (const unsigned char *payload, const u16 plen) +/* Search for Ares commands */ +int search_ares(const unsigned char *payload, const u16 plen) { /* 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; + 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 */ + default: + printk(KERN_DEBUG "Unknown Ares command %x " + "recognized, len: %u\n", + (unsigned int)payload[2], plen); +#endif } } -#if 0 +#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); - } - } + 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*/ + return 0; +} -/*Search for SoulSeek commands*/ -int -search_soul (const unsigned char *payload, const u16 plen) +/* 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 ) - { + /* 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 ) - { + printk(KERN_DEBUG "0: Soulseek command 0x%x " + "recognized\n", get_u32(payload, 4)); +#endif + 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) - { + printk(KERN_DEBUG "1: Soulseek command 0x%x " + "recognized\n", get_u16(payload, 4)); +#endif + 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: @@ -302,339 +349,364 @@ search_soul (const unsigned char *payload, const u16 plen) 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); - } + printk(KERN_DEBUG "2: Soulseek command 0x%x " + "recognized\n", get_u16(payload, 4)); +#endif + return IPP2P_SOUL * 100 + 3; + } - if (m > 34 && m < 38 ) - { + if (m > 0 && m < 6) { #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); - } + printk(KERN_DEBUG "3: Soulseek command 0x%x " + "recognized\n", get_u16(payload, 4)); +#endif + return IPP2P_SOUL * 100 + 4; + } - if (m > 39 && m < 47 ) - { + if (m > 12 && m < 19) { #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); - } + printk(KERN_DEBUG "4: Soulseek command 0x%x " + "recognized\n", get_u16(payload, 4)); +#endif + return IPP2P_SOUL * 100 + 5; + } - if (m > 61 && m < 70 ) - { + if (m > 34 && m < 38) { #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); - } + printk(KERN_DEBUG "5: Soulseek command 0x%x " + "recognized\n", get_u16(payload, 4)); +#endif + 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 + 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 + 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 */ - } - + 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 + } + /* 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); + 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); + 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); +#endif + return IPP2P_SOUL * 100 + 9; } } - return 0; + return 0; } - -/*Search for WinMX commands*/ -int -search_winmx (const unsigned char *payload, const u16 plen) +/* 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 (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 (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); - } + if (plen < 10) + return 0; - return 0; -} + if (memcmp(payload, "SEND", 4) == 0 || memcmp(payload, "GET", 3) == 0) { + u16 c = 4; + const u16 end = plen - 2; + u8 count = 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); + if (payload[c] == 0x20 && payload[c+1] == 0x22) { + c++; + count++; + if (count >= 2) + return IPP2P_WINMX * 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) -{ - 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); - - }*/ + 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 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: + /* Client: hello or Server:hello */ + return IPP2P_EDK * 100 + 1; + case 0x4c: + /* Client: Hello-Answer */ + return IPP2P_EDK * 100 + 9; + } + } + 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) +{ + 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) +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) + 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) - { + 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); - } + if (memcmp(&payload[x+1], "xdcc send #", 11) == 0) + return IPP2P_XDCC * 100 + 0; x++; } } @@ -644,150 +716,151 @@ search_xdcc (const unsigned char *payload, const u16 plen) /* 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); + 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); + 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} + {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}, }; static struct { - int command; - __u8 short_hand; /*for fucntions included in short hands*/ - int packet_len; - int (*function_name) (unsigned char *, int); + 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} + {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}, }; static int -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, - int *hotdrop) +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, int *hotdrop) { - const struct ipt_p2p_info *info = matchinfo; - unsigned char *haystack; - struct iphdr *ip = ip_hdr(skb); - int p2p_result = 0, i = 0; - int hlen = ntohs(ip->tot_len)-(ip->ihl*4); /*hlen = packet-data length*/ + const struct ipt_p2p_info *info = matchinfo; + unsigned char *haystack; + struct iphdr *ip = ip_hdr(skb); + int p2p_result = 0, i = 0; + 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; + /* must not be a fragment */ + if (offset != 0) { + if (info->debug) + printk("IPP2P.match: offset found %i \n", offset); + return 0; } - - case IPPROTO_UDP: /*what to do with an UDP packet*/ + + /* 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 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; - } + 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++; } - i++; - } - return p2p_result; + 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; } - - default: return 0; - } } static struct xt_match ipp2p_match = { - .name = "ipp2p", - .family = AF_INET, - .match = &match, - .matchsize = sizeof(struct ipt_p2p_info), - .me = THIS_MODULE, + .name = "ipp2p", + .family = AF_INET, + .match = &match, + .matchsize = sizeof(struct ipt_p2p_info), + .me = THIS_MODULE, }; static int __init init(void) { - return xt_register_match(&ipp2p_match); + return xt_register_match(&ipp2p_match); } - + static void __exit fini(void) { - xt_unregister_match(&ipp2p_match); + xt_unregister_match(&ipp2p_match); } - + module_init(init); module_exit(fini);