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nwfilter: remove target table before renaming it

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Remove the target table before renaming a table to it, i.e.,
remove table B before renaming A to B. This makes the
renaming more robust against unconnected left-over tables.
This commit is contained in:
Stefan Berger 2012-08-09 16:17:13 -04:00 committed by Stefan Berger
parent efd6824cfc
commit 98c7d8b278
1 changed files with 8 additions and 2 deletions
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10
src/nwfilter/nwfilter_ebiptables_driver.c
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@ -125,12 +125,18 @@ static const char ebiptables_script_func_rm_chains[] =
"}\n";
static const char ebiptables_script_func_rename_chains[] =
"rename_chain()\n"
"{\n"
" $EBT -t nat -F $2\n"
" $EBT -t nat -X $2\n"
" $EBT -t nat -E $1 $2\n"
"}\n"
"rename_chains()\n"
"{\n"
" for tmp in $*; do\n"
" case $tmp in\n"
" %c*) $EBT -t nat -E $tmp %c${tmp#?} ;;\n"
" %c*) $EBT -t nat -E $tmp %c${tmp#?} ;;\n"
" %c*) rename_chain $tmp %c${tmp#?} ;;\n"
" %c*) rename_chain $tmp %c${tmp#?} ;;\n"
" esac\n"
" done\n"
"}\n";