sys/dist/ipf/netinet/ip_state.h

   1 /*      $NetBSD$        */
   2
   3 /*
   4  * Copyright (C) 1995-2001 by Darren Reed.
   5  *
   6  * See the IPFILTER.LICENCE file for details on licencing.
   7  *
   8  * @(#)ip_state.h       1.3 1/12/96 (C) 1995 Darren Reed
   9  * Id: ip_state.h,v 2.68.2.12 2008/11/06 21:18:38 darrenr Exp
  10  */
  11 #ifndef _NETINET_IP_STATE_H_
  12 #define _NETINET_IP_STATE_H_
  13
  14 #if defined(__STDC__) || defined(__GNUC__) || defined(_AIX51)
  15 # define        SIOCDELST       _IOW('r', 61, struct ipfobj)
  16 #else
  17 # define        SIOCDELST       _IOW(r, 61, struct ipfobj)
  18 #endif
  19
  20 struct ipscan;
  21
  22 #ifndef IPSTATE_SIZE
  23 # define        IPSTATE_SIZE    5737
  24 #endif
  25 #ifndef IPSTATE_MAX
  26 # define        IPSTATE_MAX     4013    /* Maximum number of states held */
  27 #endif
  28
  29 #define SEQ_GE(a,b)     ((int)((a) - (b)) >= 0)
  30 #define SEQ_GT(a,b)     ((int)((a) - (b)) > 0)
  31
  32
  33 typedef struct ipstate {
  34         ipfmutex_t      is_lock;
  35         struct  ipstate *is_next;
  36         struct  ipstate **is_pnext;
  37         struct  ipstate *is_hnext;
  38         struct  ipstate **is_phnext;
  39         struct  ipstate **is_me;
  40         void            *is_ifp[4];
  41         void            *is_sync;
  42         frentry_t       *is_rule;
  43         struct  ipftq   *is_tqehead[2];
  44         struct  ipscan  *is_isc;
  45         U_QUAD_T        is_pkts[4];
  46         U_QUAD_T        is_bytes[4];
  47         U_QUAD_T        is_icmppkts[4];
  48         struct  ipftqent is_sti;
  49         u_int   is_frage[2];
  50         int     is_ref;                 /* reference count */
  51         int     is_isninc[2];
  52         u_short is_sumd[2];
  53         i6addr_t        is_src;
  54         i6addr_t        is_dst;
  55         u_int   is_pass;
  56         u_char  is_p;                   /* Protocol */
  57         u_char  is_v;
  58         u_32_t  is_hv;
  59         u_32_t  is_tag;
  60         u_32_t  is_opt[2];              /* packet options set */
  61         u_32_t  is_optmsk[2];           /*    "      "    mask */
  62         u_short is_sec;                 /* security options set */
  63         u_short is_secmsk;              /*    "        "    mask */
  64         u_short is_auth;                /* authentication options set */
  65         u_short is_authmsk;             /*    "              "    mask */
  66         union {
  67                 icmpinfo_t      is_ics;
  68                 tcpinfo_t       is_ts;
  69                 udpinfo_t       is_us;
  70                 greinfo_t       is_ug;
  71         } is_ps;
  72         u_32_t  is_flags;
  73         int     is_flx[2][2];
  74         u_32_t  is_rulen;               /* rule number when created */
  75         u_32_t  is_s0[2];
  76         u_short is_smsk[2];
  77         char    is_group[FR_GROUPLEN];
  78         char    is_sbuf[2][16];
  79         char    is_ifname[4][LIFNAMSIZ];
  80 } ipstate_t;
  81
  82 #define is_die          is_sti.tqe_die
  83 #define is_state        is_sti.tqe_state
  84 #define is_touched      is_sti.tqe_touched
  85 #define is_saddr        is_src.in4.s_addr
  86 #define is_daddr        is_dst.in4.s_addr
  87 #define is_icmp         is_ps.is_ics
  88 #define is_type         is_icmp.ici_type
  89 #define is_code         is_icmp.ici_code
  90 #define is_tcp          is_ps.is_ts
  91 #define is_udp          is_ps.is_us
  92 #define is_send         is_tcp.ts_data[0].td_end
  93 #define is_dend         is_tcp.ts_data[1].td_end
  94 #define is_maxswin      is_tcp.ts_data[0].td_maxwin
  95 #define is_maxdwin      is_tcp.ts_data[1].td_maxwin
  96 #define is_maxsend      is_tcp.ts_data[0].td_maxend
  97 #define is_maxdend      is_tcp.ts_data[1].td_maxend
  98 #define is_swinscale    is_tcp.ts_data[0].td_winscale
  99 #define is_dwinscale    is_tcp.ts_data[1].td_winscale
 100 #define is_swinflags    is_tcp.ts_data[0].td_winflags
 101 #define is_dwinflags    is_tcp.ts_data[1].td_winflags
 102 #define is_sport        is_tcp.ts_sport
 103 #define is_dport        is_tcp.ts_dport
 104 #define is_ifpin        is_ifp[0]
 105 #define is_ifpout       is_ifp[2]
 106 #define is_gre          is_ps.is_ug
 107 #define is_call         is_gre.gs_call
 108
 109 #define IS_WSPORT       SI_W_SPORT      /* 0x00100 */
 110 #define IS_WDPORT       SI_W_DPORT      /* 0x00200 */
 111 #define IS_WSADDR       SI_W_SADDR      /* 0x00400 */
 112 #define IS_WDADDR       SI_W_DADDR      /* 0x00800 */
 113 #define IS_NEWFR        SI_NEWFR        /* 0x01000 */
 114 #define IS_CLONE        SI_CLONE        /* 0x02000 */
 115 #define IS_CLONED       SI_CLONED       /* 0x04000 */
 116 #define IS_TCPFSM                          0x10000
 117 #define IS_STRICT                          0x20000
 118 #define IS_ISNSYN                          0x40000
 119 #define IS_ISNACK                          0x80000
 120 #define IS_STATESYNC                       0x100000
 121 /*
 122  * IS_SC flags are for scan-operations that need to be recognised in state.
 123  */
 124 #define IS_SC_CLIENT                    0x10000000
 125 #define IS_SC_SERVER                    0x20000000
 126 #define IS_SC_MATCHC                    0x40000000
 127 #define IS_SC_MATCHS                    0x80000000
 128 #define IS_SC_MATCHALL  (IS_SC_MATCHC|IS_SC_MATCHC)
 129 #define IS_SC_ALL       (IS_SC_MATCHC|IS_SC_MATCHC|IS_SC_CLIENT|IS_SC_SERVER)
 130
 131 /*
 132  * Flags that can be passed into fr_addstate
 133  */
 134 #define IS_INHERITED                    0x0fffff00
 135
 136 #define TH_OPENING      (TH_SYN|TH_ACK)
 137 /*
 138  * is_flags:
 139  * Bits 0 - 3 are use as a mask with the current packet's bits to check for
 140  * whether it is short, tcp/udp, a fragment or the presence of IP options.
 141  * Bits 4 - 7 are set from the initial packet and contain what the packet
 142  * anded with bits 0-3 must match.
 143  * Bits 8,9 are used to indicate wildcard source/destination port matching.
 144  * Bits 10,11 are reserved for other wildcard flag compatibility.
 145  * Bits 12,13 are for scaning.
 146  */
 147
 148 typedef struct  ipstate_save    {
 149         void    *ips_next;
 150         struct  ipstate ips_is;
 151         struct  frentry ips_fr;
 152 } ipstate_save_t;
 153
 154 #define ips_rule        ips_is.is_rule
 155
 156
 157 typedef struct  ipslog  {
 158         U_QUAD_T        isl_pkts[4];
 159         U_QUAD_T        isl_bytes[4];
 160         i6addr_t        isl_src;
 161         i6addr_t        isl_dst;
 162         u_32_t  isl_tag;
 163         u_short isl_type;
 164         union {
 165                 u_short isl_filler[2];
 166                 u_short isl_ports[2];
 167                 u_short isl_icmp;
 168         } isl_ps;
 169         u_char  isl_v;
 170         u_char  isl_p;
 171         u_char  isl_flags;
 172         u_char  isl_state[2];
 173         u_32_t  isl_rulen;
 174         char    isl_group[FR_GROUPLEN];
 175 } ipslog_t;
 176
 177 #define isl_sport       isl_ps.isl_ports[0]
 178 #define isl_dport       isl_ps.isl_ports[1]
 179 #define isl_itype       isl_ps.isl_icmp
 180
 181 #define ISL_NEW                 0
 182 #define ISL_CLONE               1
 183 #define ISL_EXPIRE              0xffff
 184 #define ISL_FLUSH               0xfffe
 185 #define ISL_REMOVE              0xfffd
 186 #define ISL_INTERMEDIATE        0xfffc
 187 #define ISL_KILLED              0xfffb
 188 #define ISL_ORPHAN              0xfffa
 189 #define ISL_UNLOAD              0xfff9
 190
 191
 192 typedef struct  ips_stat {
 193         u_long  iss_hits;
 194         u_long  iss_miss;
 195         u_long  iss_max;
 196         u_long  iss_maxref;
 197         u_long  iss_tcp;
 198         u_long  iss_udp;
 199         u_long  iss_icmp;
 200         u_long  iss_nomem;
 201         u_long  iss_expire;
 202         u_long  iss_fin;
 203         u_long  iss_active;
 204         u_long  iss_logged;
 205         u_long  iss_logfail;
 206         u_long  iss_inuse;
 207         u_long  iss_wild;
 208         u_long  iss_killed;
 209         u_long  iss_ticks;
 210         u_long  iss_bucketfull;
 211         int     iss_statesize;
 212         int     iss_statemax;
 213         ipstate_t **iss_table;
 214         ipstate_t *iss_list;
 215         u_long  *iss_bucketlen;
 216         ipftq_t *iss_tcptab;
 217 } ips_stat_t;
 218
 219
 220 extern  u_long  fr_tcpidletimeout;
 221 extern  u_long  fr_tcpclosewait;
 222 extern  u_long  fr_tcplastack;
 223 extern  u_long  fr_tcptimeout;
 224 extern  u_long  fr_tcpclosed;
 225 extern  u_long  fr_tcptimewait;
 226 extern  u_long  fr_tcphalfclosed;
 227 extern  u_long  fr_udptimeout;
 228 extern  u_long  fr_udpacktimeout;
 229 extern  u_long  fr_icmptimeout;
 230 extern  u_long  fr_icmpacktimeout;
 231 extern  u_long  fr_iptimeout;
 232 extern  int     fr_statemax;
 233 extern  int     fr_statesize;
 234 extern  int     fr_state_lock;
 235 extern  int     fr_state_maxbucket;
 236 extern  int     fr_state_maxbucket_reset;
 237 extern  ipstate_t       *ips_list;
 238 extern  ipftq_t *ips_utqe;
 239 extern  ipftq_t ips_tqtqb[IPF_TCP_NSTATES];
 240
 241 extern  int     fr_stateinit __P((void));
 242 extern  ipstate_t *fr_addstate __P((fr_info_t *, ipstate_t **, u_int));
 243 extern  frentry_t *fr_checkstate __P((struct fr_info *, u_32_t *));
 244 extern  ipstate_t *fr_stlookup __P((fr_info_t *, tcphdr_t *, ipftq_t **));
 245 extern  void    fr_statesync __P((void *));
 246 extern  void    fr_timeoutstate __P((void));
 247 extern  int     fr_tcp_age __P((struct ipftqent *, struct fr_info *,
 248                                 struct ipftq *, int));
 249 extern  int     fr_tcpinwindow __P((struct fr_info *, struct tcpdata *,
 250                                     struct tcpdata *, tcphdr_t *, int));
 251 extern  void    fr_stateunload __P((void));
 252 extern  void    ipstate_log __P((struct ipstate *, u_int));
 253 extern  int     fr_state_ioctl __P((void *, ioctlcmd_t, int, int, void *));
 254 extern  void    fr_stinsert __P((struct ipstate *, int));
 255 extern  void    fr_sttab_init __P((struct ipftq *));
 256 extern  void    fr_sttab_destroy __P((struct ipftq *));
 257 extern  void    fr_updatestate __P((fr_info_t *, ipstate_t *, ipftq_t *));
 258 extern  void    fr_statederef __P((ipstate_t **));
 259 extern  void    fr_setstatequeue __P((ipstate_t *, int));
 260 extern  int     fr_state_flush __P((int, int));
 261
 262 #endif /* _NETINET_IP_STATE_H_ */