include/linux/ip_masq.h

   1 /*
   2  *      IP_MASQ user space control interface
   3  *      $Id: ip_masq.h,v 1.2 1998/12/08 05:41:48 davem Exp $
   4  */
   5
   6 #ifndef _LINUX_IP_MASQ_H
   7 #define _LINUX_IP_MASQ_H
   8
   9 #ifdef __KERNEL__
  10 #include <linux/types.h>
  11 #include <linux/stddef.h>
  12 #else
  13 #include <sys/types.h>
  14 #include <stddef.h>
  15 #endif
  16
  17 struct ip_masq_user {
  18         int     protocol;
  19         u_int16_t       sport, dport, mport;
  20         u_int32_t       saddr, daddr, maddr;
  21         u_int32_t       rt_daddr;       /* dst address to use for rt query */
  22         u_int32_t       rt_saddr;
  23         u_int32_t       ip_tos;         /* TOS */
  24         unsigned timeout;               /* in ticks (HZ per sec) */
  25         unsigned flags;
  26         int fd;                         /* NOT IMPL: attach tunnel to this fd */
  27         int state;                      /* NOT IMPL: return conn state */
  28 };
  29
  30 #define IP_MASQ_USER_F_LISTEN   0x01    /* put entry to LISTEN state */
  31 #define IP_MASQ_USER_F_DEAD     0x02    /* mark as DEAD */
  32 #define IP_MASQ_USER_F_FORCE    0x04    /* force operation */
  33
  34 struct ip_masq_timeout {
  35         int protocol;
  36         union {
  37                 struct {
  38                         unsigned established;
  39                         unsigned syn_sent;
  40                         unsigned syn_recv;
  41                         unsigned fin_wait;
  42                         unsigned time_wait;
  43                         unsigned close;
  44                         unsigned close_wait;
  45                         unsigned last_ack;
  46                         unsigned listen;
  47                 } tcp;
  48                 unsigned udp;
  49                 unsigned icmp;
  50         } u;
  51 };
  52
  53 /*
  54  *      AUTOFW stuff
  55  */
  56 #define IP_FWD_RANGE            1
  57 #define IP_FWD_PORT             2
  58 #define IP_FWD_DIRECT           3
  59
  60 #define IP_AUTOFW_ACTIVE        1
  61 #define IP_AUTOFW_USETIME       2
  62 #define IP_AUTOFW_SECURE        4
  63
  64
  65 /* WARNING: bitwise equal to ip_autofw  in net/ip_autofw.h */
  66 struct ip_autofw_user {
  67         void * next;
  68         u_int16_t type;
  69         u_int16_t low;
  70         u_int16_t hidden;
  71         u_int16_t high;
  72         u_int16_t visible;
  73         u_int16_t protocol;
  74         u_int32_t lastcontact;
  75         u_int32_t where;
  76         u_int16_t ctlproto;
  77         u_int16_t ctlport;
  78         u_int16_t flags;
  79         /* struct timer_list timer; */
  80 };
  81
  82 /*
  83  *      PORTFW stuff
  84  */
  85 struct ip_portfw_user {
  86         u_int16_t       protocol;       /* Which protocol are we talking? */
  87         u_int32_t       laddr, raddr;   /* Remote address */
  88         u_int16_t       lport, rport;   /* Local and remote port */
  89         int             pref;           /* Preference value */
  90 };
  91
  92 /*
  93  *      MFW stuff
  94  */
  95 struct ip_mfw_user {
  96         u_int32_t           fwmark;     /* Firewalling mark */
  97         u_int32_t           raddr;      /* remote port */
  98         u_int16_t           rport;      /* remote port */
  99         u_int16_t           dummy;          /* Make up to multiple of 4 */
 100         int             pref;           /* Preference value */
 101         unsigned        flags;          /* misc flags */
 102 };
 103
 104 #define IP_MASQ_MFW_SCHED       0x01
 105
 106 #define IP_FW_MASQCTL_MAX 256
 107 #define IP_MASQ_TNAME_MAX  32
 108
 109 struct ip_masq_ctl {
 110         int m_target;
 111         int m_cmd;
 112         char m_tname[IP_MASQ_TNAME_MAX];
 113         union {
 114                 struct ip_portfw_user portfw_user;
 115                 struct ip_autofw_user autofw_user;
 116                 struct ip_mfw_user mfw_user;
 117                 struct ip_masq_user user;
 118                 unsigned char m_raw[IP_FW_MASQCTL_MAX];
 119         } u;
 120 };
 121
 122 #define IP_MASQ_CTL_BSIZE (offsetof (struct ip_masq_ctl,u))
 123
 124 #define IP_MASQ_TARGET_CORE     1
 125 #define IP_MASQ_TARGET_MOD      2       /* masq_mod is selected by "name" */
 126 #define IP_MASQ_TARGET_USER     3
 127 #define IP_MASQ_TARGET_LAST     4
 128
 129 #define IP_MASQ_CMD_NONE        0       /* just peek */
 130 #define IP_MASQ_CMD_INSERT      1
 131 #define IP_MASQ_CMD_ADD         2
 132 #define IP_MASQ_CMD_SET         3
 133 #define IP_MASQ_CMD_DEL         4
 134 #define IP_MASQ_CMD_GET         5
 135 #define IP_MASQ_CMD_FLUSH       6
 136 #define IP_MASQ_CMD_LIST        7       /* actually fake: done via /proc */
 137 #define IP_MASQ_CMD_ENABLE      8
 138 #define IP_MASQ_CMD_DISABLE     9
 139
 140 #endif /* _LINUX_IP_MASQ_H */