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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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10
scripts/base/protocols/syslog/main.bro
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@ -1,6 +1,7 @@
##! Core script support for logging syslog messages. This script represents
##! one syslog message as one logged record.
@load base/frameworks/protocols
@load ./consts
module Syslog;
@ -24,11 +25,10 @@ export {
};
}
redef capture_filters += { ["syslog"] = "port 514" };
const ports = { 514/udp } &redef;
redef dpd_config += { [ANALYZER_SYSLOG_BINPAC] = [$ports = ports] };
redef likely_server_ports += { 514/udp };
global analyzers = { ANALYZER_SYSLOG_BINPAC };
redef Protocols::analyzer_map["SYSLOG"] = analyzers;
global ports = { 514/udp };
redef Protocols::common_ports["SYSLOG"] = ports;
redef record connection += {
syslog: Info &optional;