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Initial rework of packet filter framework.

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- Large rework on packet filter framework to make many things easier.
   - Removed the PacketFilter::all_packets variable because it was confusing.
   - New variable (PacketFilter::enable_auto_protocol_capture_filters) to re-enable the old filtering model of only sniffing ports for analyzed protocols.
   - In progress plugin model for adding filtering mechanisms.
   - New default single item for capture_filters = { ["default"] = PacketFilter::default_capture_filter };
   - Mechanism and helper functions to "shunt" traffic with filters.

- Created the Protocols framework to assist with reworking how base protocol scripts are registered with DPD and other things.
   - Protocols framework creates BPF filters for registered analyzers. (if using PacketFilter framework in that mode).
This commit is contained in:
Seth Hall 2012-02-16 11:14:57 -05:00
parent 600d015dab
commit 430cd9b146
18 changed files with 403 additions and 161 deletions
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17
scripts/base/protocols/irc/main.bro
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@ -2,6 +2,8 @@
##! IRC commands along with the associated response and some additional
##! metadata about the connection if it's available.
@load base/frameworks/protocols
module IRC;
export {
@ -36,17 +38,10 @@ redef record connection += {
irc: Info &optional;
};
# Some common IRC ports.
redef capture_filters += { ["irc-6666"] = "port 6666" };
redef capture_filters += { ["irc-6667"] = "port 6667" };
redef capture_filters += { ["irc-6668"] = "port 6668" };
redef capture_filters += { ["irc-6669"] = "port 6669" };
# DPD configuration.
const irc_ports = { 6666/tcp, 6667/tcp, 6668/tcp, 6669/tcp };
redef dpd_config += { [ANALYZER_IRC] = [$ports = irc_ports] };
redef likely_server_ports += { 6666/tcp, 6667/tcp, 6668/tcp, 6669/tcp };
global analyzers = { ANALYZER_IRC };
redef Protocols::analyzer_map["IRC"] = analyzers;
global ports = { 6666/tcp, 6667/tcp, 6668/tcp, 6669/tcp, 7000/tcp };
redef Protocols::common_ports["IRC"] = ports;
event bro_init() &priority=5
{