[Bro] Write logs

[Azoff, Justin S]

> On Feb 12, 2018, at 11:04 AM, Rober Fernández <roberixion at gmail.com> wrote:
> 
> I want to write several logs in the same connexion. The problem with logging framework is that only can filter a log;

The problem is that path_func is not for filtering, it is for splitting a single log stream into one or more different output files.
If you want to filter a log file, you need to use $pred, not $path_func.

You simply need to call Log::add_filter 3 times, once for each pred function.

— 
Justin Azoff

> For example, If i had three filters with log_metadata= T, i would like to write in three differents logs
> 
> filter-1.log
> filter-3.log
> filter-10.log
> 
> 
> 
> function filter_conn(id: Log::ID, path: string, rec: Conn::Info) : string {
> 
>     local filters = Filter::filters;
>     local file_filter = "";
> 
>     for (i in filters) {
> 
>         if (i?$log_metadata && i$log_metadata == T) {
> 
>             file_filter = "filter-" + cat(i$id_fil);
>             break;
>         }
>     }
> 
>     return file_filter;
> }
> 
> 
> event bro_init() {
> 
>     local metadata: Log::Filter = [
>         $name="metadata",
>         $path="metadata",
>         $include=set("ts","id.orig_h", "id.orig_p", "id.resp_h", "id.resp_p", "proto", "service",
>          "duration", "orig_bytes", "resp_bytes", "missed_bytes", "orig_pkts", "resp_pkts", "orig_file",
>          "resp_file"),
>          $path_func=filter_conn
>     ];
> 
>     Log::add_filter(Conn::LOG, metadata);
> 
> }
> 
> With this code, I only return the first match, filter-1.log
> 
> How could I do this?
> 
> Thanks
> 
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