[Bro] Load Single Column Table with Input Framework

Chris Crawford christopher.p.crawford at gmail.com
Wed Nov 6 09:51:28 PST 2013

I'm following the tutorial on the input framework:

Everything works great.  But, if my blacklist is only one column (i.e. I
remove the other columns so that I'm only left with the "ip" column), I run
into issues.

The docs for Input::add_table say that val is optional:
val: any &optional

Record that defines the values used as the elements of the table If val is
undefined, destination has to be a set.

So, I fixed my script to look like this:

type Idx: record {
        ip: addr;

global blacklist: set[addr];

event bro_init() {
        Input::add_table([$source="blacklist.file", $name="blacklist",
$idx=Idx, $destination=blacklist]);


No more val and changed the table to a set of addr.

The size for blacklist that gets printed out is 0, even though
blacklist.file looks like this:

#fields ip
#types  addr

I expected print(|blacklist|) to print out 3.

I know I must be missing something simple.  What am I missing?  How should
I read in a single column table?

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