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API changes to file analysis mime type detection.

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Removed "file_mime_type" and "file_mime_types" event, replacing them
with a new event called "file_metadata_inferred".  It has a record
argument of type "inferred_file_metadata", which contains the mime type
information that the earlier events used to supply.  The idea here is
that future extensions to the record with new metadata will be less
likely to break user code than the alternatives (adding new events or
new event parameters).

Addresses BIT-1368.
This commit is contained in:
Jon Siwek 2015-04-10 16:26:06 -05:00
parent bd1191c60b
commit a55ce01ef3
20 changed files with 170 additions and 136 deletions
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13
scripts/base/protocols/http/entities.bro
View file

@ -93,24 +93,27 @@ event file_over_new_connection(f: fa_file, c: connection, is_orig: bool) &priori
}
}
event file_mime_type(f: fa_file, mime_type: string) &priority=5
event file_metadata_inferred(f: fa_file, meta: inferred_file_metadata) &priority=5
{
if ( ! f?$http || ! f?$is_orig )
return;
if ( ! meta?$mime_type )
return;
if ( f$is_orig )
{
if ( ! f$http?$orig_mime_types )
f$http$orig_mime_types = string_vec(mime_type);
f$http$orig_mime_types = string_vec(meta$mime_type);
else
f$http$orig_mime_types[|f$http$orig_mime_types|] = mime_type;
f$http$orig_mime_types[|f$http$orig_mime_types|] = meta$mime_type;
}
else
{
if ( ! f$http?$resp_mime_types )
f$http$resp_mime_types = string_vec(mime_type);
f$http$resp_mime_types = string_vec(meta$mime_type);
else
f$http$resp_mime_types[|f$http$resp_mime_types|] = mime_type;
f$http$resp_mime_types[|f$http$resp_mime_types|] = meta$mime_type;
}
}