• Jiri Olsa's avatar
    netfilter: nf_conntrack: nf_conntrack snmp helper · 93557f53
    Jiri Olsa authored
    Adding support for SNMP broadcast connection tracking. The SNMP
    broadcast requests are now paired with the SNMP responses.
    Thus allowing using SNMP broadcasts with firewall enabled.
    
    Please refer to the following conversation:
    http://marc.info/?l=netfilter-devel&m=125992205006600&w=2
    
    Patrick McHardy wrote:
    > > The best solution would be to add generic broadcast tracking, the
    > > use of expectations for this is a bit of abuse.
    > > The second best choice I guess would be to move the help() function
    > > to a shared module and generalize it so it can be used for both.
    This patch implements the "second best choice".
    
    Since the netbios-ns conntrack module uses the same helper
    functionality as the snmp, only one helper function is added
    for both snmp and netbios-ns modules into the new object -
    nf_conntrack_broadcast.
    Signed-off-by: default avatarJiri Olsa <jolsa@redhat.com>
    Signed-off-by: default avatarPatrick McHardy <kaber@trash.net>
    93557f53
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