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597a4d6704
- policy/ renamed to scripts/ - By default BROPATH now contains: - scripts/ - scripts/policy - scripts/site - *Nearly* all tests pass. - All of scripts/base/ is loaded by main.cc - Can be disabled by setting $BRO_NO_BASE_SCRIPTS - Scripts in scripts/base/ don't use relative path loading to ease use of BRO_NO_BASE_SCRIPTS (to copy and paste that script). - The scripts in scripts/base/protocols/ only (or soon will only) do logging and state building. - The scripts in scripts/base/frameworks/ add functionality without causing any additional overhead. - All "detection" activity happens through scripts in scripts/policy/. - Communications framework modified temporarily to need an environment variable to actually enable (ENABLE_COMMUNICATION=1) - This is so the communications framework can be loaded as part of the base without causing trouble when it's not needed. - This will be removed once a resolution to ticket #540 is reached.
124 lines
2.8 KiB
Text
124 lines
2.8 KiB
Text
##! This is the script that implements the core IRC analysis support. It only
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##! logs a very limited subset of the IRC protocol by default. The points
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##! that it logs at are NICK commands, USER commands, and JOIN commands. It
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##! log various bits of meta data as indicated in the :bro:type:`Info` record
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##! along with the command at the command arguments.
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module IRC;
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export {
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redef enum Log::ID += { IRC };
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type Tag: enum {
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EMPTY
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};
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type Info: record {
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ts: time &log;
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uid: string &log;
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id: conn_id &log;
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nick: string &log &optional;
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user: string &log &optional;
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channels: set[string] &log &optional;
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command: string &log &optional;
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value: string &log &optional;
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addl: string &log &optional;
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tags: set[Tag] &log;
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};
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global irc_log: event(rec: Info);
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}
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redef record connection += {
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irc: Info &optional;
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};
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# Some common IRC ports.
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redef capture_filters += { ["irc-6666"] = "port 6666" };
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redef capture_filters += { ["irc-6667"] = "port 6667" };
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# DPD configuration.
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global irc_ports = { 6666/tcp, 6667/tcp } &redef;
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redef dpd_config += { [ANALYZER_IRC] = [$ports = irc_ports] };
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event bro_init() &priority=5
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{
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Log::create_stream(IRC, [$columns=Info, $ev=irc_log]);
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}
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function new_session(c: connection): Info
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{
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local info: Info;
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info$ts = network_time();
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info$uid = c$uid;
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info$id = c$id;
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return info;
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}
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function set_session(c: connection)
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{
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if ( ! c?$irc )
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c$irc = new_session(c);
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c$irc$ts=network_time();
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}
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event irc_nick_message(c: connection, is_orig: bool, who: string, newnick: string) &priority=5
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{
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set_session(c);
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if ( is_orig )
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{
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c$irc$command = "NICK";
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c$irc$value = newnick;
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}
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}
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event irc_nick_message(c: connection, is_orig: bool, who: string, newnick: string) &priority=-5
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{
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if ( is_orig )
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{
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Log::write(IRC, c$irc);
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c$irc$nick = newnick;
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}
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}
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event irc_user_message(c: connection, is_orig: bool, user: string, host: string, server: string, real_name: string) &priority=5
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{
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set_session(c);
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if ( is_orig )
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{
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c$irc$command = "USER";
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c$irc$value = user;
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c$irc$addl=fmt("%s %s %s", host, server, real_name);
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}
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}
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event irc_user_message(c: connection, is_orig: bool, user: string, host: string, server: string, real_name: string) &priority=-5
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{
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if ( is_orig )
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{
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Log::write(IRC, c$irc);
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c$irc$user = user;
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}
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}
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event irc_join_message(c: connection, is_orig: bool, info_list: irc_join_list) &priority=5
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{
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set_session(c);
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if ( is_orig )
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c$irc$command = "JOIN";
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}
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event irc_join_message(c: connection, is_orig: bool, info_list: irc_join_list) &priority=-5
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{
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if ( is_orig )
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{
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for ( l in info_list )
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{
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c$irc$value = l$channel;
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c$irc$addl = (l$password != "" ? fmt(" with channel key: '%s'", l$password) : "");
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Log::write(IRC, c$irc);
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}
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}
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}
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