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1 #ifndef _XT_HASHLIMIT_H |
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2 #define _XT_HASHLIMIT_H |
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3 |
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4 /* timings are in milliseconds. */ |
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5 #define XT_HASHLIMIT_SCALE 10000 |
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6 /* 1/10,000 sec period => max of 10,000/sec. Min rate is then 429490 |
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7 seconds, or one every 59 hours. */ |
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8 |
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9 /* details of this structure hidden by the implementation */ |
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10 struct xt_hashlimit_htable; |
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11 |
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12 enum { |
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13 XT_HASHLIMIT_HASH_DIP = 1 << 0, |
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14 XT_HASHLIMIT_HASH_DPT = 1 << 1, |
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15 XT_HASHLIMIT_HASH_SIP = 1 << 2, |
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16 XT_HASHLIMIT_HASH_SPT = 1 << 3, |
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17 XT_HASHLIMIT_INVERT = 1 << 4, |
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18 }; |
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19 |
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20 struct hashlimit_cfg { |
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21 u_int32_t mode; /* bitmask of XT_HASHLIMIT_HASH_* */ |
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22 u_int32_t avg; /* Average secs between packets * scale */ |
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23 u_int32_t burst; /* Period multiplier for upper limit. */ |
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24 |
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25 /* user specified */ |
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26 u_int32_t size; /* how many buckets */ |
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27 u_int32_t max; /* max number of entries */ |
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28 u_int32_t gc_interval; /* gc interval */ |
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29 u_int32_t expire; /* when do entries expire? */ |
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30 }; |
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31 |
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32 struct xt_hashlimit_info { |
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33 char name [IFNAMSIZ]; /* name */ |
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34 struct hashlimit_cfg cfg; |
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35 |
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36 /* Used internally by the kernel */ |
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37 struct xt_hashlimit_htable *hinfo; |
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38 union { |
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39 void *ptr; |
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40 struct xt_hashlimit_info *master; |
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41 } u; |
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42 }; |
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43 |
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44 struct hashlimit_cfg1 { |
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45 u_int32_t mode; /* bitmask of XT_HASHLIMIT_HASH_* */ |
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46 u_int32_t avg; /* Average secs between packets * scale */ |
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47 u_int32_t burst; /* Period multiplier for upper limit. */ |
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48 |
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49 /* user specified */ |
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50 u_int32_t size; /* how many buckets */ |
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51 u_int32_t max; /* max number of entries */ |
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52 u_int32_t gc_interval; /* gc interval */ |
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53 u_int32_t expire; /* when do entries expire? */ |
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54 |
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55 u_int8_t srcmask, dstmask; |
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56 }; |
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57 |
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58 struct xt_hashlimit_mtinfo1 { |
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59 char name[IFNAMSIZ]; |
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60 struct hashlimit_cfg1 cfg; |
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61 |
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62 /* Used internally by the kernel */ |
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63 struct xt_hashlimit_htable *hinfo __attribute__((aligned(8))); |
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64 }; |
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65 |
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66 #endif /*_XT_HASHLIMIT_H*/ |