zeek/scripts/base/protocols/http/file-analysis.bro

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@load ./main
@load ./utils
@load base/utils/conn-ids
@load base/frameworks/files
module HTTP;
export {
redef record Info += {
## The sniffed mime type of the data being sent by the client.
client_mime_type: string &log &optional;
## The sniffed mime type of the data being returned by the server.
mime_type: string &log &optional;
};
## Default file handle provider for HTTP.
global get_file_handle: function(c: connection, is_orig: bool): string;
}
function get_file_handle(c: connection, is_orig: bool): string
{
if ( ! c?$http )
return "";
local mime_depth = is_orig ? c$http$orig_mime_depth : c$http$resp_mime_depth;
if ( c$http$range_request )
{
return cat(ANALYZER_HTTP, is_orig, c$id$orig_h, mime_depth, build_url(c$http));
}
else
{
return cat(ANALYZER_HTTP, c$start_time, is_orig,
c$http$trans_depth, mime_depth, id_string(c$id));
}
}
event bro_init() &priority=5
{
Files::register_protocol(ANALYZER_HTTP, HTTP::get_file_handle);
}
event file_over_new_connection(f: fa_file, c: connection) &priority=5
{
if ( c?$http )
{
#if (!f?$mime_type)
# print f;
#
#if ( f$is_orig )
# c$http$client_mime_type = f$mime_type;
#else
# c$http$mime_type = f$mime_type;
if ( c$http?$filename )
f$info$filename = c$http$filename;
}
}