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Add PacketFilter::remove_exclude function

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This adds a public function to the PacketFilter framework that
allows the caller to remove an exclude filter by filter id.
This commit is contained in:
Peter Cullen 2024-04-17 21:25:35 +00:00
parent 1563814c4a
commit 81856cc391
1 changed files with 17 additions and 0 deletions
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17
scripts/base/frameworks/packet-filter/main.zeek
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@ -101,6 +101,16 @@ export {
## installed or not. ## installed or not.
global exclude_for: function(filter_id: string, filter: string, span: interval): bool; global exclude_for: function(filter_id: string, filter: string, span: interval): bool;
## Remove a previously added exclude filter fragment by name. The
## traffic that was being filtered will be allowed through the filter
## after calling this function.
##
## filter_id: The name given to the filter fragment which you'd like to remove.
##
## Returns: A boolean value to indicate if a filter fragment with the given name
## actually installed.
global remove_exclude: function(filter_id: string): bool;
## Call this function to build and install a new dynamically built ## Call this function to build and install a new dynamically built
## packet filter. ## packet filter.
global install: function(): bool; global install: function(): bool;
@ -194,12 +204,19 @@ function register_filter_plugin(fp: FilterPlugin)
} }
event remove_dynamic_filter(filter_id: string) event remove_dynamic_filter(filter_id: string)
{
remove_exclude(filter_id);
}
function remove_exclude(filter_id: string): bool
{ {
if ( filter_id in dynamic_restrict_filters ) if ( filter_id in dynamic_restrict_filters )
{ {
delete dynamic_restrict_filters[filter_id]; delete dynamic_restrict_filters[filter_id];
install(); install();
return T;
} }
return F;
} }
function exclude(filter_id: string, filter: string): bool function exclude(filter_id: string, filter: string): bool