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https://bro-tracker.atlassian.net/browse/BIT-1521?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=23819#comment-23819
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Justin Azoff commented on BIT-1521:
-----------------------------------
Hmm, this may be a little harder than I thought. c$service is a set, and bro
doesn't have a bif for comparing one set to another set.. i can do it with a
loop like this, but is there a better way?
function intersects(a: set[string], b: set[string]): bool{
for (one in a) {
if (one in b) {
return T;
}
}
return F;
}
even though c$service is a set, it should only have 1 or 2 strings in it, so it
is not a large loop.
> known services should probably ignore gridftp-data
> --------------------------------------------------
>
> Key: BIT-1521
> URL: https://bro-tracker.atlassian.net/browse/BIT-1521
> Project: Bro Issue Tracker
> Issue Type: Improvement
> Components: Bro
> Affects Versions: 2.4
> Reporter: Justin Azoff
> Assignee: Justin Azoff
> Priority: Low
>
> known services script does
> {code}
> if ( ! addr_matches_host(id$resp_h, service_tracking) ||
> "ftp-data" in c$service || # don't include ftp data sessions
> ("DNS" in c$service && c$resp$size == 0) ) # for dns, require
> that the server talks.
> return;
> {code}
> but should probably also ignore gridftp-data. Probably a good idea to add a
> set of services that behave like ftp for it to check.
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