**diff options**

author | Jan Engelhardt <jengelh@medozas.de> | 2011-05-02 16:38:11 +0200 |
---|---|---|

committer | Jan Engelhardt <jengelh@medozas.de> | 2011-05-09 00:18:22 +0200 |

commit | 39d3aa36ea38668a2c343b5af42b2d8d3616a9de (patch) | |

tree | 4b43df0411d93a1332c2beeed55d60a6e40cd5b5 /extensions/libxt_statistic.man | |

parent | d118d21ea3108f94ca1f84f11dd39f3f12e9ee2b (diff) |

libxt_statistic: increase precision on create and dump

Currently, libxt_statistic only dumps the probability with a
granularity of 1/1000000. Assuming only stuffed packets with 1440
bytes payload, this would match approximately every 1.341 GB, which is
pretty low for a high-volume router. Trying to match any larger
interval than that (e.g. 2 GB) will cause libxt_statistic to output
"--probability 0.000000", and when restored, will cause it to never
match again.
Bump the dump precision to what xt_statistic can really do, and adjust
the manpage to include a word about it.
Furthermore, employ explicit rounding when reading the argument from
the command line, because the previous implicit conversion would use
truncation, which is not very exact.
Signed-off-by: Jan Engelhardt <jengelh@medozas.de>

Diffstat (limited to 'extensions/libxt_statistic.man')

-rw-r--r-- | extensions/libxt_statistic.man | 7 |

1 files changed, 3 insertions, 4 deletions

diff --git a/extensions/libxt_statistic.man b/extensions/libxt_statistic.man index 4947dafe..47182bfb 100644 --- a/extensions/libxt_statistic.man +++ b/extensions/libxt_statistic.man @@ -12,10 +12,9 @@ and .B nth. .TP [\fB!\fP] \fB\-\-probability\fP \fIp\fP -Set the probability from 0 to 1 for a packet to be randomly -matched. It works only with the -.B random -mode. +Set the probability for a packet to be randomly matched. It only works with the +\fBrandom\fP mode. \fIp\fP must be within 0.0 and 1.0. The supported +granularity is in 1/2147483648th increments. .TP [\fB!\fP] \fB\-\-every\fP \fIn\fP Match one packet every nth packet. It works only with the |