[syslog-ng] Invalid frame header; header=''

Balint Kovacs balint.kovacs at balabit.com
Wed Oct 14 17:31:27 CEST 2009

jnordwick wrote:
> I want the new syslog style messages. I'm writing some Java code to  
> send messages to syslog and I need the new format. Is there somewhere  
> that the transport protocol is described? It will also be over UDP  
> too. TCP was just for a little test.
> Thanks
> -j
AFAIK (Bazsi, pls correct if I'm wrong) the format is described in
RFC5425 (http://tools.ietf.org/html/rfc5425) Section 4.3 "Sending data".
The RFC concerns TLS transport, but syslog-ng implements the same
transport format over TCP as well.

If you're comfortable with reading C code, you can also take a look at
how syslog-ng does this in logproto.c, around the function

Best Regards,

Balint Kovacs
Security Engineer
balint.kovacs at balabit.com

BalaBit IT Security
Bártfai str. 54.
H-1115 Budapest
Phone +36 1 371 0540
Fax +36 1 208 0875

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