[Bro-Dev] [JIRA] (BIT-1497) pattern [:space:] shortcut not matching as expected

Lloyd Brown (JIRA) jira at bro-tracker.atlassian.net
Thu Oct 22 14:28:00 PDT 2015


    [ https://bro-tracker.atlassian.net/browse/BIT-1497?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=22647#comment-22647 ] 

Lloyd Brown commented on BIT-1497:
----------------------------------

That seems to be the case.  Sorry to annoy you unnecessarily.

To be honest, I'm more familiar with the PCRE-style shortcuts (eg '\s') than this style.  Those can exist either inside or outside a char class.  Old habits, I guess.....

Thanks,
Lloyd

> pattern [:space:] shortcut not matching as expected
> ---------------------------------------------------
>
>                 Key: BIT-1497
>                 URL: https://bro-tracker.atlassian.net/browse/BIT-1497
>             Project: Bro Issue Tracker
>          Issue Type: Problem
>          Components: Bro
>    Affects Versions: 2.4
>         Environment: Running tests using Bro 2.4.1 (precompiled from http://download.opensuse.org/repositories/network:/bro/xUbuntu_14.10/) on Ubuntu 14.10.
> Running using a simple "/opt/bro/bin/bro myscript.bro" syntax.
>            Reporter: Lloyd Brown
>              Labels: pattern
>         Attachments: patterns.space_shortcut.testcase.bro, patterns.space_shortcut.testcase.bro.output
>
>
> I'm trying to do some RegEx-like pattern matching of a data stream using Bro, and I'm finding that, at least some of the shortcuts, like '[:space:]' don't seem to act as expected.
> In short, I expected that '[:space:]' and '[ \f\n\r\t\v]' would be interchangeable, but that doesn't seem to be the case.  I have not tested any other shortcuts like '[:alpha:]', '[:digit:]', etc.  Just '[:space:]' so far.
> I will attach an example script, as well as a file containing the output I'm seeing.



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