LXR linux/include/uapi/linux/netfilter/nfnetlink

   1#ifndef _NF_OSF_H
   2#define _NF_OSF_H
   3
   4#include <linux/types.h>
   5#include <linux/ip.h>
   6#include <linux/tcp.h>
   7
   8#define MAXGENRELEN     32
   9
  10#define NF_OSF_GENRE    (1 << 0)
  11#define NF_OSF_TTL      (1 << 1)
  12#define NF_OSF_LOG      (1 << 2)
  13#define NF_OSF_INVERT   (1 << 3)
  14
  15#define NF_OSF_LOGLEVEL_ALL             0       /* log all matched fingerprints */
  16#define NF_OSF_LOGLEVEL_FIRST           1       /* log only the first matced fingerprint */
  17#define NF_OSF_LOGLEVEL_ALL_KNOWN       2       /* do not log unknown packets */
  18
  19#define NF_OSF_TTL_TRUE                 0       /* True ip and fingerprint TTL comparison */
  20
  21/* Check if ip TTL is less than fingerprint one */
  22#define NF_OSF_TTL_LESS                 1
  23
  24/* Do not compare ip and fingerprint TTL at all */
  25#define NF_OSF_TTL_NOCHECK              2
  26
  27#define NF_OSF_FLAGMASK         (NF_OSF_GENRE | NF_OSF_TTL | \
  28                                 NF_OSF_LOG | NF_OSF_INVERT)
  29/* Wildcard MSS (kind of).
  30 * It is used to implement a state machine for the different wildcard values
  31 * of the MSS and window sizes.
  32 */
  33struct nf_osf_wc {
  34        __u32   wc;
  35        __u32   val;
  36};
  37
  38/* This struct represents IANA options
  39 * http://www.iana.org/assignments/tcp-parameters
  40 */
  41struct nf_osf_opt {
  42        __u16                   kind, length;
  43        struct nf_osf_wc        wc;
  44};
  45
  46struct nf_osf_info {
  47        char    genre[MAXGENRELEN];
  48        __u32   len;
  49        __u32   flags;
  50        __u32   loglevel;
  51        __u32   ttl;
  52};
  53
  54struct nf_osf_user_finger {
  55        struct nf_osf_wc        wss;
  56
  57        __u8    ttl, df;
  58        __u16   ss, mss;
  59        __u16   opt_num;
  60
  61        char    genre[MAXGENRELEN];
  62        char    version[MAXGENRELEN];
  63        char    subtype[MAXGENRELEN];
  64
  65        /* MAX_IPOPTLEN is maximum if all options are NOPs or EOLs */
  66        struct nf_osf_opt       opt[MAX_IPOPTLEN];
  67};
  68
  69struct nf_osf_nlmsg {
  70        struct nf_osf_user_finger       f;
  71        struct iphdr                    ip;
  72        struct tcphdr                   tcp;
  73};
  74
  75/* Defines for IANA option kinds */
  76enum iana_options {
  77        OSFOPT_EOL = 0,         /* End of options */
  78        OSFOPT_NOP,             /* NOP */
  79        OSFOPT_MSS,             /* Maximum segment size */
  80        OSFOPT_WSO,             /* Window scale option */
  81        OSFOPT_SACKP,           /* SACK permitted */
  82        OSFOPT_SACK,            /* SACK */
  83        OSFOPT_ECHO,
  84        OSFOPT_ECHOREPLY,
  85        OSFOPT_TS,              /* Timestamp option */
  86        OSFOPT_POCP,            /* Partial Order Connection Permitted */
  87        OSFOPT_POSP,            /* Partial Order Service Profile */
  88
  89        /* Others are not used in the current OSF */
  90        OSFOPT_EMPTY = 255,
  91};
  92
  93/* Initial window size option state machine: multiple of mss, mtu or
  94 * plain numeric value. Can also be made as plain numeric value which
  95 * is not a multiple of specified value.
  96 */
  97enum nf_osf_window_size_options {
  98        OSF_WSS_PLAIN   = 0,
  99        OSF_WSS_MSS,
 100        OSF_WSS_MTU,
 101        OSF_WSS_MODULO,
 102        OSF_WSS_MAX,
 103};
 104
 105enum nf_osf_attr_type {
 106        OSF_ATTR_UNSPEC,
 107        OSF_ATTR_FINGER,
 108        OSF_ATTR_MAX,
 109};
 110
 111/*
 112 * Add/remove fingerprint from the kernel.
 113 */
 114enum nf_osf_msg_types {
 115        OSF_MSG_ADD,
 116        OSF_MSG_REMOVE,
 117        OSF_MSG_MAX,
 118};
 119
 120#endif /* _NF_OSF_H */
 121