in metron-platform/metron-parsing/metron-parsers-common/src/main/java/org/apache/metron/parsers/utils/SyslogUtils.java [100:129]
public static String getFacilityFromPriority(int priority) {
int facility = priority >> 3;
switch (facility) {
case 0: return "kern";
case 1: return "user";
case 2: return "mail";
case 3: return "daemon";
case 4: return "auth";
case 5: return "syslog";
case 6: return "lpr";
case 7: return "news";
case 8: return "uucp";
//case 9
case 10: return "authpriv";
case 11: return "ftp";
//case 12
//case 13
//case 14
case 15: return "cron";
case 16: return "local0";
case 17: return "local1";
case 18: return "local2";
case 19: return "local3";
case 20: return "local4";
case 21: return "local5";
case 22: return "local6";
case 23: return "local7";
default: return "unknown";
}
}