From 71c5b49bdc4daf8b06516509d36a297af41f4e28 Mon Sep 17 00:00:00 2001
From: Seth Hall <seth@icir.org>
Date: Thu, 27 Sep 2012 13:39:48 -0400
Subject: [PATCH] Major updates to fix the Intel framework API.

---
 scripts/base/frameworks/intel/__load__.bro    |   9 +-
 scripts/base/frameworks/intel/cluster.bro     |  45 ++-
 scripts/base/frameworks/intel/indexing.bro    |  68 ----
 scripts/base/frameworks/intel/input.bro       |   4 +-
 scripts/base/frameworks/intel/main.bro        | 308 ++++++------------
 scripts/base/frameworks/intel/non-cluster     |   3 -
 .../frameworks/intel/plugins/dns_zones.bro    |  61 ----
 scripts/base/frameworks/intel/plugins/set.bro |  19 --
 8 files changed, 126 insertions(+), 391 deletions(-)
 delete mode 100644 scripts/base/frameworks/intel/indexing.bro
 delete mode 100644 scripts/base/frameworks/intel/non-cluster
 delete mode 100644 scripts/base/frameworks/intel/plugins/dns_zones.bro
 delete mode 100644 scripts/base/frameworks/intel/plugins/set.bro

diff --git a/scripts/base/frameworks/intel/__load__.bro b/scripts/base/frameworks/intel/__load__.bro
index 8b425f6de4..c6822212c0 100644
--- a/scripts/base/frameworks/intel/__load__.bro
+++ b/scripts/base/frameworks/intel/__load__.bro
@@ -1,15 +1,8 @@
 @load ./main
 @load ./input
-@load ./indexing
 
 # The cluster framework must be loaded first.
 @load base/frameworks/cluster
-
 @if ( Cluster::is_enabled() )
 @load ./cluster
-@endif
-
-@load ./plugins/dns_zones
-
-
-@load ./http-user-agents
\ No newline at end of file
+@endif
\ No newline at end of file
diff --git a/scripts/base/frameworks/intel/cluster.bro b/scripts/base/frameworks/intel/cluster.bro
index 6b361fc711..5b5f67e978 100644
--- a/scripts/base/frameworks/intel/cluster.bro
+++ b/scripts/base/frameworks/intel/cluster.bro
@@ -5,53 +5,52 @@
 
 module Intel;
 
-export {
-	global cluster_new_item: event(item: Item);
-	global cluster_updated_item: event(item: Item);
-
-	redef record Item += {
-		## This field is solely used internally for cluster transparency with
-		## the intelligence framework to avoid storms of intelligence data 
-		## swirling forever.  It allows data to propagate only a single time.
-		first_dispatch: bool &default=T;
-	};
-}
-
 # If this process is not a manager process, we don't want the full metadata
 @if ( Cluster::local_node_type() != Cluster::MANAGER )
-redef store_metadata = F;
+redef have_full_data = F;
 @endif
 
+global cluster_new_item: event(item: Item);
+global cluster_updated_item: event(item: Item);
+
+redef record Item += {
+	## This field is solely used internally for cluster transparency with
+	## the intelligence framework to avoid storms of intelligence data 
+	## swirling forever.  It allows data to propagate only a single time.
+	first_dispatch: bool &default=T;
+};
+
 # Primary intelligence distribution comes from manager.
 redef Cluster::manager2worker_events += /Intel::cluster_(new|updated)_item/;
 # If a worker finds intelligence and adds it, it should share it back to the manager.
 redef Cluster::worker2manager_events += /Intel::(match_in_.*_no_items|cluster_(new|updated)_item)/;
 
 @if ( Cluster::local_node_type() == Cluster::MANAGER )
-event Intel::match_in_conn_no_items(c: connection, found: Found)
+event Intel::match_in_conn_no_items(c: connection, seen: Seen) &priority=5
 	{
-	local items = lookup(found);
-	event Intel::match_in_conn(c, found, items);
+	event Intel::match_in_conn(c, seen, Intel::get_items(seen));
 	}
 @endif
 
-event Intel::cluster_new_item(item: Intel::Item)
+event Intel::cluster_new_item(item: Intel::Item) &priority=5
 	{
-	# Ignore locally generated events.
+	# Ignore locally generated events to avoid event storms.
 	if ( is_remote_event() )
 		Intel::insert(item);
 	}
 
-event Intel::cluster_updated_item(item: Intel::Item)
+event Intel::cluster_updated_item(item: Intel::Item) &priority=5
 	{
-	# Ignore locally generated events.
+	# Ignore locally generated events to avoid event storms.
 	if ( is_remote_event() )
 		Intel::insert(item);
 	}
 
-event Intel::new_item(item: Intel::Item)
+event Intel::new_item(item: Intel::Item) &priority=5
 	{
-	# The cluster manager always rebroadcasts intelligence
+	# The cluster manager always rebroadcasts intelligence.
+	# Workers redistribute it if it was locally generated on 
+	# the worker.
 	if ( Cluster::local_node_type() == Cluster::MANAGER ||
 	     item$first_dispatch )
 		{
@@ -60,7 +59,7 @@ event Intel::new_item(item: Intel::Item)
 		}
 	}
 
-event Intel::updated_item(item: Intel::Item)
+event Intel::updated_item(item: Intel::Item) &priority=5
 	{
 	# If this is the first time this item has been dispatched or this
 	# is a manager, send it over the cluster.
diff --git a/scripts/base/frameworks/intel/indexing.bro b/scripts/base/frameworks/intel/indexing.bro
deleted file mode 100644
index a89ac44038..0000000000
--- a/scripts/base/frameworks/intel/indexing.bro
+++ /dev/null
@@ -1,68 +0,0 @@
-module Intel;
-
-export {
-	type Indexes: record {
-		hosts:   set[addr]            &default=set();
-		strings: set[string, SubType] &default=set();
-	};
-
-	redef record Plugin += {
-		index: function(item: Item) &optional;
-	}
-
-	## Rebuild indexes this interval after any change to data if there 
-	## have been no other changes.
-	const rebuild_indexes_min = 1min &redef;
-	## Wait no longer than this interval to update indexes after any
-	## change to the data.
-	const rebuild_indexes_max = 5min &redef;
-
-	global indexing_done: event();
-}
-
-local indexes: Indexes = [];
-
-global last_index_rebuild = network_time();
-global last_datastore_mod = network_time();
-
-
-event reindex() &priority=5
-	{
-	local tmp_indexes: Indexes;
-	for ( plugin in plugins )
-		{
-		for ( m in metas$metas )
-			{
-			add tmp_indexes$hosts[m$source];
-			add tmp_indexes$strings[m$intent];
-
-			#for ( ip in index_plugins )
-			#	{
-			#	ip$index(index, m);
-			#	}
-			}
-		}
-		indexes = 
-		event indexing_done();
-	}
-
-event rebuild_indexes(triggered_at: time)
-	{
-	if ( network_time() - triggered_at >= rebuild_indexes_max ||
-	     network_time() - last_datastore_mod >= rebuild_indexes_min )
-		{
-		reindex();
-		}
-	}
-
-event Intel::new_item(item:: Item) &priority=5
-	{
-	last_datastore_mod = network_time();
-	schedule rebuild_indexes_min { rebuild_indexes(network_time()) };
-	}
-
-event Intel::updated_item(item:: Item) &priority=5
-	{
-	last_datastore_mod = network_time();
-	schedule rebuild_indexes_min { rebuild_indexes(network_time()) };
-	}
\ No newline at end of file
diff --git a/scripts/base/frameworks/intel/input.bro b/scripts/base/frameworks/intel/input.bro
index 4776a0852e..fd2c0bae97 100644
--- a/scripts/base/frameworks/intel/input.bro
+++ b/scripts/base/frameworks/intel/input.bro
@@ -3,7 +3,9 @@
 module Intel;
 
 export {
-	## Files that will be read off disk
+	## Intelligence files that will be read off disk.  The files are
+	## reread everytime they are updated so updates much be atomic with
+	## "mv" instead of writing the file in place.
 	const read_files: set[string] = {} &redef;
 }
 
diff --git a/scripts/base/frameworks/intel/main.bro b/scripts/base/frameworks/intel/main.bro
index 9d73915fb0..dbf40f637d 100644
--- a/scripts/base/frameworks/intel/main.bro
+++ b/scripts/base/frameworks/intel/main.bro
@@ -2,12 +2,6 @@
 ##! and strings (with a str_type).  Metadata can
 ##! also be associated with the intelligence like for making more informated
 ##! decisions about matching and handling of intelligence.
-#
-# TODO: 
-#   Comments
-#   Better Intel::Item comparison (has_meta)
-#   Generate a notice when messed up data is discovered.
-#   Complete "net" support as an intelligence type.
 
 @load base/frameworks/notice
 
@@ -24,7 +18,7 @@ export {
 	
 	## String data needs to be further categoried since it could represent
 	## and number of types of data.
-	type SubType: enum {
+	type StrType: enum {
 		## A complete URL.
 		URL,
 		## User-Agent string, typically HTTP or mail message body.
@@ -41,39 +35,13 @@ export {
 		## Certificate hash.  Normally for X.509 certificates from the SSL analyzer.
 		CERT_HASH,
 	};
-
-	## Why a piece of intelligence is being added or looked up.  The intent a human
-	## placed upon the data when it was decided to be worthwhile as intelligence.
-	type Intent: enum {
-		## Data is to be considered malicious.
-		MALICIOUS,
-		## Data is to be considered sensitive.  In many cases this may be
-		## hosts containing contractually or legally restricted data such 
-		## as HIPPA, PCI, Sarbanes-Oxley, etc.
-		SENSITIVE,
-		## Data that is never to be seen.  This acts like the "canary in 
-		## the coal mine".  A possibility could be file hashes for 
-		## critically important files.
-		CANARY,
-		## Data that is whitelisted.  The primary use for this intent is to 
-		## locally whitelist false positive data from external feeds.
-		WHITELIST,
-	};
-
-	## Enum to represent where data came from when it was discovered.
-	type Where: enum {
-		## A catchall value to represent data of unknown provenance.
-		ANYWHERE,
-	};
-		
+	
 	## Data about an :bro:type:`Intel::Item`
 	type MetaData: record {
 		## An arbitrary string value representing the data source.  Typically,
 		## the convention for this field will be the source name and feed name
 		## separated by a hyphen.  For example: "source1-c&c".
 		source:      string;
-		## The intent of the data.
-		intent:      Intent;
 		## A freeform description for the data.
 		desc:        string      &optional;
 		## A URL for more information about the data.
@@ -84,215 +52,144 @@ export {
 		host:        addr           &optional;
 		net:         subnet         &optional;
 		str:         string         &optional;
-		str_type:    SubType        &optional;
+		str_type:    StrType        &optional;
 		
 		meta:        MetaData;
 	};
 	
-	type Found: record {
+	## Enum to represent where data came from when it was discovered.
+	type Where: enum {
+		## A catchall value to represent data of unknown provenance.
+		ANYWHERE,
+	};
+
+	type Seen: record {
 		host:      addr          &optional;
 		str:       string        &optional;
-		str_type:  SubType       &optional;
+		str_type:  StrType       &optional;
 
 		where:     Where;
 	};
 
-	type Info: record {
-		ts:      time   &log;
-		## This value should be one of: "info", "warn", "error"
-		level:   string &log;
-		message: string &log;
-		item:    Item   &log;
+	type PolicyItem: record {
+		pred:   function(seen: Seen, item: Item): bool &optional;
+
+		log_it: bool &default=T;
 	};
 
-	type Plugin: record {
-		index:  function()                        &optional;
-		match:  function(found: Found): bool      &optional;
-		lookup: function(found: Found): set[Item] &optional;
-	};
-
-	## Manipulation and query API functions.
+	## Intelligence data manipulation functions.
 	global insert:      function(item: Item);
 	global delete_item: function(item: Item): bool;
-	global unique_data: function(): count;
 
 	## Function to declare discovery of a piece of data in order to check
 	## it against known intelligence for matches.
-	global found_in_conn:  function(c: connection, found: Found);
+	global seen_in_conn:  function(c: connection, seen: Seen);
 
-	## Event to represent a match happening in a connection.  On clusters there
-	## is no assurance as to where this event will be generated so don't 
-	## assume that arbitrary global state beyond the given data
-	## will be available.
-	global match_in_conn: event(c: connection, found: Found, items: set[Item]);
+	## Intelligence policy variable for handling matches.
+	const policy: set[PolicyItem] = {} &redef;
 
-	global find: function(found: Found): bool;
-	global lookup: function(found: Found): set[Item];
-
-
-	## Plugin API functions
-	global register_custom_matcher: function(str_type: SubType, 
-	                                         func: function(found: Found): bool);
-	global register_custom_lookup: function(str_type: SubType,
-	                                        func: function(found: Found): set[Item]);
-
-	## API Events
+	## API Events that indicate when various things happen internally within the 
+	## intelligence framework.
 	global new_item: event(item: Item);
 	global updated_item: event(item: Item);
-	global insert_event: event(item: Item);
-
-	## Optionally store metadata.  This is primarily used internally depending on
-	## if this is a cluster deployment or not.  On clusters, workers probably
-	## shouldn't be storing the full metadata.
-	const store_metadata = T &redef;
 }
 
-# Internal handler for conn oriented matches with no metadata base on the store_metadata setting.
-global match_in_conn_no_items: event(c: connection, found: Found);
+## Event to represent a match happening in a connection.  On clusters there
+## is no assurance as to where this event will be generated so don't 
+## assume that arbitrary global state beyond the given data
+## will be available.
+global match_in_conn: event(c: connection, seen: Seen, items: set[Item]);
+
+# Internal handler for conn oriented matches with no metadata based on the have_full_data setting.
+global match_in_conn_no_items: event(c: connection, seen: Seen);
+
+## Optionally store metadata.  This is used internally depending on
+## if this is a cluster deployment or not.
+const have_full_data = T &redef;
 
 type DataStore: record {
-	host_data:   table[addr] of set[MetaData];
-	string_data: table[string, SubType] of set[MetaData];
+	net_data:    table[subnet] of set[MetaData];
+	string_data: table[string, StrType] of set[MetaData];
 };
 global data_store: DataStore;
 
-global custom_matchers: table[SubType] of set[function(found: Found): bool];
-global custom_lookup: table[SubType] of set[function(found: Found): set[Item]];
-
-
-event bro_init() &priority=5
+function find(seen: Seen): bool
 	{
-	Log::create_stream(Intel::LOG, [$columns=Info]);
-	}
-
-
-function find(found: Found): bool
-	{
-	if ( found?$host && found$host in data_store$host_data)
+	if ( seen?$host && 
+	     seen$host in data_store$net_data )
 		{
 		return T;
 		}
-	else if ( found?$str && found?$str_type && 
-	          [found$str, found$str_type] in data_store$string_data )
+	else if ( seen?$str && seen?$str_type &&
+	          [seen$str, seen$str_type] in data_store$string_data )
 		{
 		return T;
 		}
-
-	# Finder plugins!
-	for ( plugin in plugins )
+	else
 		{
-		if ( plugin?$match && plugin$match(found) )
-			return T;
+		return F;
 		}
-
-	return F;
 	}
 
-function lookup(found: Found): set[Item]
+function get_items(seen: Seen): set[Item]
 	{
 	local item: Item;
 	local return_data: set[Item] = set();
 
-	if ( found?$host )
+	if ( ! have_full_data )
+		{
+		# A reporter warning should be generated here because this function
+		# should never be called from a host that doesn't have the full data.
+		# TODO: do a reporter warning.
+		return return_data;
+		}
+
+	if ( seen?$host )
 		{
 		# See if the host is known about and it has meta values
-		if ( found$host in data_store$host_data )
+		if ( seen$host in data_store$net_data )
 			{
-			for ( m in data_store$host_data[found$host] )
+			for ( m in data_store$net_data[seen$host] )
 				{
-				item = [$host=found$host, $meta=m];
+				# TODO: the lookup should be finding all and not just most specific
+				#       and $host/$net should have the correct value.
+				item = [$host=seen$host, $meta=m];
 				add return_data[item];
 				}
 			}
 		}
-	else if ( found?$str && found?$str_type )
+	else if ( seen?$str && seen?$str_type )
 		{
 		# See if the string is known about and it has meta values
-		if ( [found$str, found$str_type] in data_store$string_data )
+		if ( [seen$str, seen$str_type] in data_store$string_data )
 			{
-			for ( m in data_store$string_data[found$str, found$str_type] )
+			for ( m in data_store$string_data[seen$str, seen$str_type] )
 				{
-				item = [$str=found$str, $str_type=found$str_type, $meta=m];
+				item = [$str=seen$str, $str_type=seen$str_type, $meta=m];
 				add return_data[item];
 				}
 			}
-
-		# Check if there are any custom str_type lookup functions and add the values to 
-		# the result set.
-		if ( found$str_type in custom_lookup )
-			{
-			for ( lookup_func in custom_lookup[found$str_type] )
-				{
-				# Iterating here because there is no way to merge sets generically.
-				for ( custom_lookup_item in lookup_func(found) )
-					add return_data[custom_lookup_item];
-				}
-			}
-		}
-
-
-
-	# TODO: Later we should probably track whitelist matches.
-	# TODO: base this on a set instead of iterating the items.
-	for ( item in return_data )
-		{
-		if ( item$meta$intent == WHITELIST )
-			{
-			return set();
-			}
 		}
 
 	return return_data;
 	}
 
-function Intel::found_in_conn(c: connection, found: Found)
+function Intel::seen_in_conn(c: connection, seen: Seen)
 	{
-	if ( find(found) )
+	if ( find(seen) )
 		{
-		if ( store_metadata )
+		if ( have_full_data )
 			{
-			local items = lookup(found);
-			event Intel::match_in_conn(c, found, items);
+			local items = get_items(seen);
+			event Intel::match_in_conn(c, seen, items);
 			}
 		else
 			{
-			event Intel::match_in_conn_no_items(c, found);
+			event Intel::match_in_conn_no_items(c, seen);
 			}
 		}
 	}
 
-function register_custom_matcher(str_type: SubType, func: function(found: Found): bool)
-	{
-	if ( str_type !in custom_matchers )
-		custom_matchers[str_type] = set(func);
-	else
-		add custom_matchers[str_type][func];
-	}
-
-function register_custom_lookup(str_type: SubType, func: function(found: Found): set[Item])
-	{
-	if ( str_type !in custom_lookup )
-		custom_lookup[str_type] = set(func);
-	else
-		add custom_lookup[str_type][func];
-	}
-
-function unique_data(): count
-	{
-	return |data_store$host_data| + |data_store$string_data|;
-	}
-
-#function get_meta(check: MetaData, metas: set[MetaData]): MetaData
-#	{
-#	local check_hash = md5_hash(check);
-#	for ( m in metas )
-#		{
-#		if ( check_hash == md5_hash(m) )
-#			return m;
-#		}
-#
-#	return [$source=""];
-#	}
 
 function has_meta(check: MetaData, metas: set[MetaData]): bool
 	{
@@ -309,35 +206,41 @@ function has_meta(check: MetaData, metas: set[MetaData]): bool
 
 function insert(item: Item)
 	{
-	local err_msg = "";
-	if ( item?$str && ! item?$str_type )
-		err_msg = "You must provide a str_type for strings or this item doesn't make sense.";
-	
-	if ( err_msg == "" )
+	if ( item?$str && !item?$str_type )
 		{
-		# Create and fill out the meta data item.
-		local meta = item$meta;
-		local metas: set[MetaData];
+		event reporter_warning(network_time(), fmt("You must provide a str_type for strings or this item doesn't make sense.  Item: %s", item), "");
+		return;
+		}
 
-		if ( item?$host )
-			{
-			if ( item$host !in data_store$host_data )
-				data_store$host_data[item$host] = set();
-			
-			metas = data_store$host_data[item$host];
-			}
-		else if ( item?$str )
-			{
-			if ( [item$str, item$str_type] !in data_store$string_data )
-				data_store$string_data[item$str, item$str_type] = set();
+	# Create and fill out the meta data item.
+	local meta = item$meta;
+	local metas: set[MetaData];
 
-			metas = data_store$string_data[item$str, item$str_type];
-			}
-		else
-			{
-			err_msg = "Malformed intelligence item";
-			}
+	if ( item?$host )
+		{
+		local host = mask_addr(item$host, is_v4_addr(item$host) ? 32 : 128);
+		if ( host !in data_store$net_data )
+			data_store$net_data[host] = set();
+		
+		metas = data_store$net_data[host];
+		}
+	else if ( item?$net )
+		{
+		if ( item$net !in data_store$net_data )
+			data_store$net_data[item$net] = set();
 
+		metas = data_store$net_data[item$net];
+		}
+	else if ( item?$str )
+		{
+		if ( [item$str, item$str_type] !in data_store$string_data )
+			data_store$string_data[item$str, item$str_type] = set();
+
+		metas = data_store$string_data[item$str, item$str_type];
+		}
+
+	if ( have_full_data )
+		{
 		for ( m in metas )
 			{
 			if ( meta$source == m$source )
@@ -349,6 +252,7 @@ function insert(item: Item)
 					}
 				else
 					{
+					# Same source, different metadata means updated item.
 					event Intel::updated_item(item);
 					break;
 					}
@@ -359,19 +263,7 @@ function insert(item: Item)
 				break;
 				}
 			}
-
 		add metas[item$meta];
-		return;
 		}
-	
-	if ( err_msg != "" )
-		Log::write(Intel::LOG, [$ts=network_time(), $level="warn", $message=err_msg, $item=item]);
-	
-	return;
 	}
-	
-event insert_event(item: Item)
-	{
-	insert(item);
-	}
-
+	
\ No newline at end of file
diff --git a/scripts/base/frameworks/intel/non-cluster b/scripts/base/frameworks/intel/non-cluster
deleted file mode 100644
index dddf430966..0000000000
--- a/scripts/base/frameworks/intel/non-cluster
+++ /dev/null
@@ -1,3 +0,0 @@
-
-module Intel;
-
diff --git a/scripts/base/frameworks/intel/plugins/dns_zones.bro b/scripts/base/frameworks/intel/plugins/dns_zones.bro
deleted file mode 100644
index ba35b35421..0000000000
--- a/scripts/base/frameworks/intel/plugins/dns_zones.bro
+++ /dev/null
@@ -1,61 +0,0 @@
-
-module Intel;
-
-export {
-	redef enum SubType += {
-		DNS_ZONE,
-	};
-}
-
-function dns_zone_ripper(found: Found): Found
-	{
-	local found_copy = copy(found);
-
-	## # We only support fourth level depth zones right now for performance.
-	## if ( /(\.[^\.]+){4,}/ in found_copy$str )
-	## 	{
-	## 	local parts = split_all(found_copy$str, /\./);
-	## 	local len = |parts|;
-	## 	found_copy$str = parts[len-6] + "." + parts[len-4] + "." + parts[len-2] + "." + parts[len];
-	## 	}
-
-	# We can assume that we're getting a string and subtype because
-	# this function is only registered for DOMAIN and DNS_ZONE data.
-	local dns_name = sub(found_copy$str, /^[^\.]*\./, "");
-	found_copy$str = dns_name;
-	# We are doing a literal search for a DNS zone at this point
-	found_copy$str_type = Intel::DNS_ZONE;
-	return found_copy;
-	}
-
-# This matcher extension adds additional matchers for domain names.
-function dns_zone_matcher(found: Found): bool
-	{
-	local found_copy = dns_zone_ripper(found);
-	if ( found$str == found_copy$str )
-		return F;
-
-	return Intel::find(found_copy);
-	}
-
-function dns_zone_lookup(found: Found): set[Item]
-	{
-	local result_set: set[Item] = set();
-	local found_copy = dns_zone_ripper(found);
-	if ( found$str == found_copy$str )
-		return result_set;
-
-	for ( item in Intel::lookup(found_copy) )
-		add result_set[item];
-	return result_set;
-	}
-
-event bro_init() &priority=10
-	{
-	register_custom_matcher(DOMAIN, dns_zone_matcher);
-	register_custom_lookup(DOMAIN, dns_zone_lookup);
-	## The DNS_ZONE subtype needs added because it's ultimately 
-	## a subset of DOMAIN and will need to be searched as well.
-	register_custom_matcher(DNS_ZONE, dns_zone_matcher);
-	register_custom_lookup(DNS_ZONE, dns_zone_lookup);
-	}
diff --git a/scripts/base/frameworks/intel/plugins/set.bro b/scripts/base/frameworks/intel/plugins/set.bro
deleted file mode 100644
index b169e91972..0000000000
--- a/scripts/base/frameworks/intel/plugins/set.bro
+++ /dev/null
@@ -1,19 +0,0 @@
-module Intel;
-
-redef record Intel::Indexes += {
-	hosts:   set[addr]            &default=set();
-	strings: set[string, SubType] &default=set();
-};
-
-redef plugins += {
-	[$index() = {
-
-	 },
-	 $match(found: Found): bool = {
-
-	 },
-	 $lookup(found: Found): set[Item] = {
-
-	}
-	]
-};
\ No newline at end of file