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31f60853c9
And switch Zeek's base scripts over to using it in place of "connection_state_remove". The difference between the two is that "connection_state_remove" is raised for all events while "successful_connection_remove" excludes TCP connections that were never established (just SYN packets). There can be performance benefits to this change for some use-cases. There's also a new event called ``connection_successful`` and a new ``connection`` record field named "successful" to help indicate this new property of connections.
132 lines
2.8 KiB
Text
132 lines
2.8 KiB
Text
##! Implements base functionality for MySQL analysis. Generates the mysql.log file.
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module MySQL;
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@load ./consts
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export {
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redef enum Log::ID += { mysql::LOG };
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type Info: record {
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## Timestamp for when the event happened.
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ts: time &log;
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## Unique ID for the connection.
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uid: string &log;
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## The connection's 4-tuple of endpoint addresses/ports.
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id: conn_id &log;
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## The command that was issued
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cmd: string &log;
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## The argument issued to the command
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arg: string &log;
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## Did the server tell us that the command succeeded?
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success: bool &log &optional;
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## The number of affected rows, if any
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rows: count &log &optional;
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## Server message, if any
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response: string &log &optional;
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};
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## Event that can be handled to access the MySQL record as it is sent on
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## to the logging framework.
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global log_mysql: event(rec: Info);
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}
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redef record connection += {
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mysql: Info &optional;
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};
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const ports = { 1434/tcp, 3306/tcp };
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event zeek_init() &priority=5
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{
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Log::create_stream(mysql::LOG, [$columns=Info, $ev=log_mysql, $path="mysql"]);
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Analyzer::register_for_ports(Analyzer::ANALYZER_MYSQL, ports);
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}
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event mysql_handshake(c: connection, username: string)
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{
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if ( ! c?$mysql )
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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$id;
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info$cmd = "login";
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info$arg = username;
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c$mysql = info;
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}
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}
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event mysql_command_request(c: connection, command: count, arg: string) &priority=5
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{
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if ( c?$mysql )
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{
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# We got a request, but we haven't logged our
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# previous request yet, so let's do that now.
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Log::write(mysql::LOG, c$mysql);
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delete c$mysql;
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}
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local info: Info;
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info$ts = network_time();
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info$uid = c$uid;
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info$id = c$id;
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info$cmd = commands[command];
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info$arg = sub(arg, /\0$/, "");
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c$mysql = info;
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}
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event mysql_command_request(c: connection, command: count, arg: string) &priority=-5
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{
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if ( c?$mysql && c$mysql?$cmd && c$mysql$cmd == "quit" )
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{
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# We get no response for quits, so let's just log it now.
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Log::write(mysql::LOG, c$mysql);
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delete c$mysql;
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}
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}
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event mysql_error(c: connection, code: count, msg: string) &priority=5
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{
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if ( c?$mysql )
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{
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c$mysql$success = F;
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c$mysql$response = msg;
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}
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}
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event mysql_error(c: connection, code: count, msg: string) &priority=-5
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{
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if ( c?$mysql )
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{
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Log::write(mysql::LOG, c$mysql);
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delete c$mysql;
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}
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}
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event mysql_ok(c: connection, affected_rows: count) &priority=5
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{
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if ( c?$mysql )
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{
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c$mysql$success = T;
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c$mysql$rows = affected_rows;
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}
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}
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event mysql_ok(c: connection, affected_rows: count) &priority=-5
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{
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if ( c?$mysql )
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{
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Log::write(mysql::LOG, c$mysql);
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delete c$mysql;
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}
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}
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event successful_connection_remove(c: connection) &priority=-5
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{
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if ( c?$mysql )
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{
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Log::write(mysql::LOG, c$mysql);
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delete c$mysql;
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}
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}
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