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Current File : //usr/include/linux/netfilter/xt_osf.h
/* * Copyright (c) 2003+ Evgeniy Polyakov <johnpol@2ka.mxt.ru> * * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #ifndef _XT_OSF_H #define _XT_OSF_H #include <linux/types.h> #define MAXGENRELEN 32 #define XT_OSF_GENRE (1<<0) #define XT_OSF_TTL (1<<1) #define XT_OSF_LOG (1<<2) #define XT_OSF_INVERT (1<<3) #define XT_OSF_LOGLEVEL_ALL 0 /* log all matched fingerprints */ #define XT_OSF_LOGLEVEL_FIRST 1 /* log only the first matced fingerprint */ #define XT_OSF_LOGLEVEL_ALL_KNOWN 2 /* do not log unknown packets */ #define XT_OSF_TTL_TRUE 0 /* True ip and fingerprint TTL comparison */ #define XT_OSF_TTL_LESS 1 /* Check if ip TTL is less than fingerprint one */ #define XT_OSF_TTL_NOCHECK 2 /* Do not compare ip and fingerprint TTL at all */ struct xt_osf_info { char genre[MAXGENRELEN]; __u32 len; __u32 flags; __u32 loglevel; __u32 ttl; }; /* * Wildcard MSS (kind of). * It is used to implement a state machine for the different wildcard values * of the MSS and window sizes. */ struct xt_osf_wc { __u32 wc; __u32 val; }; /* * This struct represents IANA options * http://www.iana.org/assignments/tcp-parameters */ struct xt_osf_opt { __u16 kind, length; struct xt_osf_wc wc; }; struct xt_osf_user_finger { struct xt_osf_wc wss; __u8 ttl, df; __u16 ss, mss; __u16 opt_num; char genre[MAXGENRELEN]; char version[MAXGENRELEN]; char subtype[MAXGENRELEN]; /* MAX_IPOPTLEN is maximum if all options are NOPs or EOLs */ struct xt_osf_opt opt[MAX_IPOPTLEN]; }; struct xt_osf_nlmsg { struct xt_osf_user_finger f; struct iphdr ip; struct tcphdr tcp; }; /* Defines for IANA option kinds */ enum iana_options { OSFOPT_EOL = 0, /* End of options */ OSFOPT_NOP, /* NOP */ OSFOPT_MSS, /* Maximum segment size */ OSFOPT_WSO, /* Window scale option */ OSFOPT_SACKP, /* SACK permitted */ OSFOPT_SACK, /* SACK */ OSFOPT_ECHO, OSFOPT_ECHOREPLY, OSFOPT_TS, /* Timestamp option */ OSFOPT_POCP, /* Partial Order Connection Permitted */ OSFOPT_POSP, /* Partial Order Service Profile */ /* Others are not used in the current OSF */ OSFOPT_EMPTY = 255, }; /* * Initial window size option state machine: multiple of mss, mtu or * plain numeric value. Can also be made as plain numeric value which * is not a multiple of specified value. */ enum xt_osf_window_size_options { OSF_WSS_PLAIN = 0, OSF_WSS_MSS, OSF_WSS_MTU, OSF_WSS_MODULO, OSF_WSS_MAX, }; /* * Add/remove fingerprint from the kernel. */ enum xt_osf_msg_types { OSF_MSG_ADD, OSF_MSG_REMOVE, OSF_MSG_MAX, }; enum xt_osf_attr_type { OSF_ATTR_UNSPEC, OSF_ATTR_FINGER, OSF_ATTR_MAX, }; #endif /* _XT_OSF_H */
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