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Fix HTTP multipart body file analysis.

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Each part now gets assigned a different file handle/id.
This commit is contained in:
Jon Siwek 2013-05-21 15:35:22 -05:00
parent 38ac03d558
commit 3cbef60f57
8 changed files with 112 additions and 1 deletions
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23
scripts/base/protocols/http/file-analysis.bro
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@ -6,20 +6,41 @@
module HTTP;
export {
redef record HTTP::Info += {
## Number of MIME entities in the HTTP request message body so far.
request_mime_level: count &default=0;
## Number of MIME entities in the HTTP response message body so far.
response_mime_level: count &default=0;
};
## Default file handle provider for HTTP.
global get_file_handle: function(c: connection, is_orig: bool): string;
}
event http_begin_entity(c: connection, is_orig: bool) &priority=5
{
if ( ! c?$http ) return;
if ( is_orig )
++c$http$request_mime_level;
else
++c$http$response_mime_level;
}
function get_file_handle(c: connection, is_orig: bool): string
{
if ( ! c?$http ) return "";
local mime_level: count =
is_orig ? c$http$request_mime_level : c$http$response_mime_level;
local mime_level_str: string = mime_level > 1 ? cat(mime_level) : "";
if ( c$http$range_request )
return cat(ANALYZER_HTTP, " ", is_orig, " ", c$id$orig_h, " ",
build_url(c$http));
return cat(ANALYZER_HTTP, " ", c$start_time, " ", is_orig, " ",
c$http$trans_depth, " ", id_string(c$id));
c$http$trans_depth, mime_level_str, " ", id_string(c$id));
}
module GLOBAL;