// See the file "COPYING" in the main distribution directory for copyright.

#include "zeek-config.h"

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <signal.h>
#include <string.h>
#include <list>
#ifdef HAVE_GETOPT_H
#include <getopt.h>
#endif

#ifdef USE_IDMEF
extern "C" {
#include <libidmef/idmefxml.h>
}
#endif

#include <openssl/ssl.h>
#include <openssl/err.h>

#include "bsd-getopt-long.h"
#include "input.h"
#include "DNS_Mgr.h"
#include "Frame.h"
#include "Scope.h"
#include "Event.h"
#include "File.h"
#include "Reporter.h"
#include "Net.h"
#include "NetVar.h"
#include "Var.h"
#include "Timer.h"
#include "Stmt.h"
#include "Debug.h"
#include "DFA.h"
#include "RuleMatcher.h"
#include "Anon.h"
#include "EventRegistry.h"
#include "Stats.h"
#include "Brofiler.h"
#include "Traverse.h"

#include "threading/Manager.h"
#include "input/Manager.h"
#include "logging/Manager.h"
#include "logging/writers/ascii/Ascii.h"
#include "input/readers/raw/Raw.h"
#include "analyzer/Manager.h"
#include "analyzer/Tag.h"
#include "plugin/Manager.h"
#include "file_analysis/Manager.h"
#include "zeekygen/Manager.h"
#include "iosource/Manager.h"
#include "broker/Manager.h"

#include "binpac_bro.h"

#include "3rdparty/sqlite3.h"

Brofiler brofiler;

#ifndef HAVE_STRSEP
extern "C" {
char* strsep(char**, const char*);
};
#endif

extern "C" {
#include "setsignal.h"
};

#ifdef USE_PERFTOOLS_DEBUG
HeapLeakChecker* heap_checker = 0;
int perftools_leaks = 0;
int perftools_profile = 0;
#endif

DNS_Mgr* dns_mgr;
TimerMgr* timer_mgr;
ValManager* val_mgr = 0;
PortManager* port_mgr = 0;
logging::Manager* log_mgr = 0;
threading::Manager* thread_mgr = 0;
input::Manager* input_mgr = 0;
plugin::Manager* plugin_mgr = 0;
analyzer::Manager* analyzer_mgr = 0;
file_analysis::Manager* file_mgr = 0;
zeekygen::Manager* zeekygen_mgr = 0;
iosource::Manager* iosource_mgr = 0;
bro_broker::Manager* broker_mgr = 0;

const char* prog;
char* writefile = 0;
name_list prefixes;
Stmt* stmts;
EventHandlerPtr net_done = 0;
RuleMatcher* rule_matcher = 0;
EventRegistry* event_registry = 0;
ProfileLogger* profiling_logger = 0;
ProfileLogger* segment_logger = 0;
SampleLogger* sample_logger = 0;
int signal_val = 0;
extern char version[];
char* command_line_policy = 0;
vector<string> params;
set<string> requested_plugins;
char* proc_status_file = 0;

OpaqueType* md5_type = 0;
OpaqueType* sha1_type = 0;
OpaqueType* sha256_type = 0;
OpaqueType* entropy_type = 0;
OpaqueType* cardinality_type = 0;
OpaqueType* topk_type = 0;
OpaqueType* bloomfilter_type = 0;
OpaqueType* x509_opaque_type = 0;
OpaqueType* ocsp_resp_opaque_type = 0;
OpaqueType* paraglob_type = 0;

// Keep copy of command line
int bro_argc;
char** bro_argv;

const char* zeek_version()
	{
#ifdef DEBUG
	static char* debug_version = 0;

	if ( ! debug_version )
		{
		int n = strlen(version) + sizeof("-debug") + 1;
		debug_version = new char[n];
		snprintf(debug_version, n, "%s%s", version, "-debug");
		}

	return debug_version;
#else
	return version;
#endif
	}

bool bro_dns_fake()
	{
	return zeekenv("ZEEK_DNS_FAKE");
	}

void usage(int code = 1)
	{
	fprintf(stderr, "zeek version %s\n", zeek_version());
	fprintf(stderr, "usage: %s [options] [file ...]\n", prog);
	fprintf(stderr, "    <file>                         | policy file, or read stdin\n");
	fprintf(stderr, "    -a|--parse-only                | exit immediately after parsing scripts\n");
	fprintf(stderr, "    -b|--bare-mode                 | don't load scripts from the base/ directory\n");
	fprintf(stderr, "    -d|--debug-policy              | activate policy file debugging\n");
	fprintf(stderr, "    -e|--exec <zeek code>          | augment loaded policies by given code\n");
	fprintf(stderr, "    -f|--filter <filter>           | tcpdump filter\n");
	fprintf(stderr, "    -h|--help                      | command line help\n");
	fprintf(stderr, "    -i|--iface <interface>         | read from given interface\n");
	fprintf(stderr, "    -p|--prefix <prefix>           | add given prefix to policy file resolution\n");
	fprintf(stderr, "    -r|--readfile <readfile>       | read from given tcpdump file\n");
	fprintf(stderr, "    -s|--rulefile <rulefile>       | read rules from given file\n");
	fprintf(stderr, "    -t|--tracefile <tracefile>     | activate execution tracing\n");
	fprintf(stderr, "    -v|--version                   | print version and exit\n");
	fprintf(stderr, "    -w|--writefile <writefile>     | write to given tcpdump file\n");
#ifdef DEBUG
	fprintf(stderr, "    -B|--debug <dbgstreams>        | Enable debugging output for selected streams ('-B help' for help)\n");
#endif
	fprintf(stderr, "    -C|--no-checksums              | ignore checksums\n");
	fprintf(stderr, "    -F|--force-dns                 | force DNS\n");
	fprintf(stderr, "    -G|--load-seeds <file>         | load seeds from given file\n");
	fprintf(stderr, "    -H|--save-seeds <file>         | save seeds to given file\n");
	fprintf(stderr, "    -I|--print-id <ID name>        | print out given ID\n");
	fprintf(stderr, "    -N|--print-plugins             | print available plugins and exit (-NN for verbose)\n");
	fprintf(stderr, "    -P|--prime-dns                 | prime DNS\n");
	fprintf(stderr, "    -Q|--time                      | print execution time summary to stderr\n");
	fprintf(stderr, "    -S|--debug-rules               | enable rule debugging\n");
	fprintf(stderr, "    -T|--re-level <level>          | set 'RE_level' for rules\n");
	fprintf(stderr, "    -U|--status-file <file>        | Record process status in file\n");
	fprintf(stderr, "    -W|--watchdog                  | activate watchdog timer\n");
	fprintf(stderr, "    -X|--zeekygen <cfgfile>        | generate documentation based on config file\n");

#ifdef USE_PERFTOOLS_DEBUG
	fprintf(stderr, "    -m|--mem-leaks                 | show leaks  [perftools]\n");
	fprintf(stderr, "    -M|--mem-profile               | record heap [perftools]\n");
#endif
	fprintf(stderr, "    --pseudo-realtime[=<speedup>]  | enable pseudo-realtime for performance evaluation (default 1)\n");

#ifdef USE_IDMEF
	fprintf(stderr, "    -n|--idmef-dtd <idmef-msg.dtd> | specify path to IDMEF DTD file\n");
#endif

	fprintf(stderr, "    $ZEEKPATH                      | file search path (%s)\n", bro_path().c_str());
	fprintf(stderr, "    $ZEEK_PLUGIN_PATH              | plugin search path (%s)\n", bro_plugin_path());
	fprintf(stderr, "    $ZEEK_PLUGIN_ACTIVATE          | plugins to always activate (%s)\n", bro_plugin_activate());
	fprintf(stderr, "    $ZEEK_PREFIXES                 | prefix list (%s)\n", bro_prefixes().c_str());
	fprintf(stderr, "    $ZEEK_DNS_FAKE                 | disable DNS lookups (%s)\n", bro_dns_fake() ? "on" : "off");
	fprintf(stderr, "    $ZEEK_SEED_FILE                | file to load seeds from (not set)\n");
	fprintf(stderr, "    $ZEEK_LOG_SUFFIX               | ASCII log file extension (.%s)\n", logging::writer::Ascii::LogExt().c_str());
	fprintf(stderr, "    $ZEEK_PROFILER_FILE            | Output file for script execution statistics (not set)\n");
	fprintf(stderr, "    $ZEEK_DISABLE_ZEEKYGEN         | Disable Zeekygen documentation support (%s)\n", zeekenv("ZEEK_DISABLE_ZEEKYGEN") ? "set" : "not set");
	fprintf(stderr, "    $ZEEK_DNS_RESOLVER             | IPv4/IPv6 address of DNS resolver to use (%s)\n", zeekenv("ZEEK_DNS_RESOLVER") ? zeekenv("ZEEK_DNS_RESOLVER") : "not set, will use first IPv4 address from /etc/resolv.conf");

	fprintf(stderr, "\n");

	exit(code);
	}

bool show_plugins(int level)
	{
	plugin::Manager::plugin_list plugins = plugin_mgr->ActivePlugins();

	if ( ! plugins.size() )
		{
		printf("No plugins registered, not even any built-ins. This is probably a bug.\n");
		return false;
		}

	ODesc d;

	if ( level == 1 )
		d.SetShort();

	int count = 0;

	for ( plugin::Manager::plugin_list::const_iterator i = plugins.begin(); i != plugins.end(); i++ )
		{
		if ( requested_plugins.size()
		     && requested_plugins.find((*i)->Name()) == requested_plugins.end() )
			continue;

		(*i)->Describe(&d);

		if ( ! d.IsShort() )
			d.Add("\n");

		++count;
		}

	printf("%s", d.Description());

	plugin::Manager::inactive_plugin_list inactives = plugin_mgr->InactivePlugins();

	if ( inactives.size() && ! requested_plugins.size() )
		{
		printf("\nInactive dynamic plugins:\n");

		for ( plugin::Manager::inactive_plugin_list::const_iterator i = inactives.begin(); i != inactives.end(); i++ )
			{
			string name = (*i).first;
			string path = (*i).second;
			printf("  %s (%s)\n", name.c_str(), path.c_str());
			}
		}

	return count != 0;
	}

void done_with_network()
	{
	set_processing_status("TERMINATING", "done_with_network");

	// Cancel any pending alarms (watchdog, in particular).
	(void) alarm(0);

	if ( net_done )
		{
		mgr.Drain();
		// Don't propagate this event to remote clients.
		mgr.Dispatch(new Event(net_done,
		                       {new Val(timer_mgr->Time(), TYPE_TIME)}),
		             true);
		}

	if ( profiling_logger )
		profiling_logger->Log();

	terminating = true;

	analyzer_mgr->Done();
	timer_mgr->Expire();
	dns_mgr->Flush();
	mgr.Drain();
	mgr.Drain();

	net_finish(1);

#ifdef USE_PERFTOOLS_DEBUG

		if ( perftools_profile )
			{
			HeapProfilerDump("post net_run");
			HeapProfilerStop();
			}

		if ( heap_checker && ! heap_checker->NoLeaks() )
			{
			fprintf(stderr, "Memory leaks - aborting.\n");
			abort();
			}
#endif
	}

void terminate_bro()
	{
	set_processing_status("TERMINATING", "terminate_bro");

	terminating = true;

	// File analysis termination may produce events, so do it early on in
	// the termination process.
	file_mgr->Terminate();

	brofiler.WriteStats();

	EventHandlerPtr zeek_done = internal_handler("zeek_done");
	if ( zeek_done )
		mgr.QueueEventFast(zeek_done, val_list{});

	timer_mgr->Expire();
	mgr.Drain();

	if ( profiling_logger )
		{
		// FIXME: There are some occasional crashes in the memory
		// allocation code when killing Bro.  Disabling this for now.
		if ( ! (signal_val == SIGTERM || signal_val == SIGINT) )
			profiling_logger->Log();

		delete profiling_logger;
		}

	mgr.Drain();

	log_mgr->Terminate();
	input_mgr->Terminate();
	thread_mgr->Terminate();
	broker_mgr->Terminate();

	mgr.Drain();

	plugin_mgr->FinishPlugins();

	delete zeekygen_mgr;
	delete timer_mgr;
	delete event_registry;
	delete analyzer_mgr;
	delete file_mgr;
	// broker_mgr is deleted via iosource_mgr
	delete iosource_mgr;
	delete log_mgr;
	delete reporter;
	delete plugin_mgr;
	delete val_mgr;
	delete port_mgr;

	reporter = 0;
	}

void termination_signal()
	{
	set_processing_status("TERMINATING", "termination_signal");

	reporter->Info("received termination signal");
	net_get_final_stats();
	done_with_network();
	net_delete();

	terminate_bro();

	// Close files after net_delete(), because net_delete()
	// might write to connection content files.
	BroFile::CloseOpenFiles();

	delete rule_matcher;

	exit(0);
	}

RETSIGTYPE sig_handler(int signo)
	{
	set_processing_status("TERMINATING", "sig_handler");
	signal_val = signo;

	return RETSIGVAL;
	}

static void atexit_handler()
	{
	set_processing_status("TERMINATED", "atexit");
	}

static void bro_new_handler()
	{
	out_of_memory("new");
	}

int main(int argc, char** argv)
	{
	std::set_new_handler(bro_new_handler);

	double time_start = current_time(true);

	brofiler.ReadStats();

	bro_argc = argc;
	bro_argv = new char* [argc];

	for ( int i = 0; i < argc; i++ )
		bro_argv[i] = copy_string(argv[i]);

	name_list interfaces;
	name_list read_files;
	name_list rule_files;
	char* id_name = 0;

	char* seed_load_file = zeekenv("ZEEK_SEED_FILE");
	char* seed_save_file = 0;
	char* user_pcap_filter = 0;
	char* debug_streams = 0;
	int parse_only = false;
	int bare_mode = false;
	int do_watchdog = 0;
	int override_ignore_checksums = 0;
	int rule_debug = 0;
	int RE_level = 4;
	int print_plugins = 0;
	int time_bro = 0;

	static struct option long_opts[] = {
		{"parse-only",	no_argument,		0,	'a'},
		{"bare-mode",	no_argument,		0,	'b'},
		{"debug-policy",	no_argument,		0,	'd'},
		{"exec",		required_argument,	0,	'e'},
		{"filter",		required_argument,	0,	'f'},
		{"help",		no_argument,		0,	'h'},
		{"iface",		required_argument,	0,	'i'},
		{"zeekygen",		required_argument,		0,	'X'},
		{"prefix",		required_argument,	0,	'p'},
		{"readfile",		required_argument,	0,	'r'},
		{"rulefile",		required_argument,	0,	's'},
		{"tracefile",		required_argument,	0,	't'},
		{"writefile",		required_argument,	0,	'w'},
		{"version",		no_argument,		0,	'v'},
		{"no-checksums",	no_argument,		0,	'C'},
		{"force-dns",		no_argument,		0,	'F'},
		{"load-seeds",		required_argument,	0,	'G'},
		{"save-seeds",		required_argument,	0,	'H'},
		{"print-plugins",	no_argument,		0,	'N'},
		{"prime-dns",		no_argument,		0,	'P'},
		{"time",		no_argument,		0,	'Q'},
		{"debug-rules",		no_argument,		0,	'S'},
		{"re-level",		required_argument,	0,	'T'},
		{"watchdog",		no_argument,		0,	'W'},
		{"print-id",		required_argument,	0,	'I'},
		{"status-file",		required_argument,	0,	'U'},

#ifdef	DEBUG
		{"debug",		required_argument,	0,	'B'},
#endif
#ifdef	USE_IDMEF
		{"idmef-dtd",		required_argument,	0,	'n'},
#endif
#ifdef	USE_PERFTOOLS_DEBUG
		{"mem-leaks",	no_argument,		0,	'm'},
		{"mem-profile",	no_argument,		0,	'M'},
#endif

		{"pseudo-realtime",	optional_argument, 0,	'E'},

		{0,			0,			0,	0},
	};

	enum DNS_MgrMode dns_type = DNS_DEFAULT;

	dns_type = bro_dns_fake() ? DNS_FAKE : DNS_DEFAULT;

	RETSIGTYPE (*oldhandler)(int);

	prog = argv[0];

	prefixes.append(strdup(""));	// "" = "no prefix"

	char* p = zeekenv("ZEEK_PREFIXES");

	if ( p )
		add_to_name_list(p, ':', prefixes);

	string zeekygen_config;

#ifdef USE_IDMEF
	string libidmef_dtd_path = "idmef-message.dtd";
#endif

	extern char* optarg;
	extern int optind, opterr;

	int long_optsind;
	opterr = 0;

	char opts[256];
	safe_strncpy(opts, "B:e:f:G:H:I:i:n:p:r:s:T:t:U:w:X:CFNPQSWabdhv",
		     sizeof(opts));

#ifdef USE_PERFTOOLS_DEBUG
	strncat(opts, "mM", 2);
#endif

	int op;
	while ( (op = getopt_long(argc, argv, opts, long_opts, &long_optsind)) != EOF )
		switch ( op ) {
		case 'a':
			parse_only = true;
			break;

		case 'b':
			bare_mode = true;
			break;

		case 'd':
			fprintf(stderr, "Policy file debugging ON.\n");
			g_policy_debug = true;
			break;

		case 'e':
			command_line_policy = optarg;
			break;

		case 'f':
			user_pcap_filter = optarg;
			break;

		case 'h':
			usage(0);
			break;

		case 'i':
			interfaces.append(optarg);
			break;

		case 'p':
			prefixes.append(optarg);
			break;

		case 'r':
			read_files.append(optarg);
			break;

		case 's':
			rule_files.append(optarg);
			break;

		case 't':
			g_trace_state.SetTraceFile(optarg);
			g_trace_state.TraceOn();
			break;

		case 'v':
			fprintf(stdout, "%s version %s\n", prog, zeek_version());
			exit(0);
			break;

		case 'w':
			writefile = optarg;
			break;

		case 'B':
			debug_streams = optarg;
			break;

		case 'C':
			override_ignore_checksums = 1;
			break;

		case 'E':
			pseudo_realtime = 1.0;
			if ( optarg )
				pseudo_realtime = atof(optarg);
			break;

		case 'F':
			if ( dns_type != DNS_DEFAULT )
				usage(1);
			dns_type = DNS_FORCE;
			break;

		case 'G':
			seed_load_file = optarg;
			break;

		case 'H':
			seed_save_file = optarg;
			break;

		case 'I':
			id_name = optarg;
			break;

		case 'N':
			++print_plugins;
			break;

		case 'P':
			if ( dns_type != DNS_DEFAULT )
				usage(1);
			dns_type = DNS_PRIME;
			break;

		case 'Q':
			time_bro = 1;
			break;

		case 'S':
			rule_debug = 1;
			break;

		case 'T':
			RE_level = atoi(optarg);
			break;

		case 'U':
			proc_status_file = optarg;
			break;

		case 'W':
			do_watchdog = 1;
			break;

		case 'X':
			zeekygen_config = optarg;
			break;

#ifdef USE_PERFTOOLS_DEBUG
		case 'm':
			perftools_leaks = 1;
			break;

		case 'M':
			perftools_profile = 1;
			break;
#endif

#ifdef USE_IDMEF
		case 'n':
			fprintf(stderr, "Using IDMEF XML DTD from %s\n", optarg);
			libidmef_dtd_path = optarg;
			break;
#endif

		case 0:
			// This happens for long options that don't have
			// a short-option equivalent.
			break;

		case '?':
		default:
			usage(1);
			break;
		}

	atexit(atexit_handler);
	set_processing_status("INITIALIZING", "main");

	bro_start_time = current_time(true);

	val_mgr = new ValManager();
	port_mgr = new PortManager();
	reporter = new Reporter();
	thread_mgr = new threading::Manager();
	plugin_mgr = new plugin::Manager();

#ifdef DEBUG
	if ( debug_streams )
		{
		debug_logger.EnableStreams(debug_streams);
		debug_logger.OpenDebugLog("debug");
		}
#endif

	init_random_seed((seed_load_file && *seed_load_file ? seed_load_file : 0) , seed_save_file);
	// DEBUG_MSG("HMAC key: %s\n", md5_digest_print(shared_hmac_md5_key));
	init_hash_function();

	ERR_load_crypto_strings();
	OPENSSL_add_all_algorithms_conf();
	SSL_library_init();
	SSL_load_error_strings();

	int r = sqlite3_initialize();

	if ( r != SQLITE_OK )
		reporter->Error("Failed to initialize sqlite3: %s", sqlite3_errstr(r));

	// FIXME: On systems that don't provide /dev/urandom, OpenSSL doesn't
	// seed the PRNG. We should do this here (but at least Linux, FreeBSD
	// and Solaris provide /dev/urandom).

	if ( interfaces.length() > 0 && read_files.length() > 0 )
		usage(1);

#ifdef USE_IDMEF
	char* libidmef_dtd_path_cstr = new char[libidmef_dtd_path.length() + 1];
	safe_strncpy(libidmef_dtd_path_cstr, libidmef_dtd_path.c_str(),
		     libidmef_dtd_path.length());
	globalsInit(libidmef_dtd_path_cstr);	// Init LIBIDMEF globals
	createCurrentDoc("1.0");		// Set a global XML document
#endif

	timer_mgr = new PQ_TimerMgr("<GLOBAL>");
	// timer_mgr = new CQ_TimerMgr();

	zeekygen_mgr = new zeekygen::Manager(zeekygen_config, bro_argv[0]);

	add_essential_input_file("base/init-bare.zeek");
	add_essential_input_file("base/init-frameworks-and-bifs.zeek");

	if ( ! bare_mode )
		add_input_file("base/init-default.zeek");

	plugin_mgr->SearchDynamicPlugins(bro_plugin_path());

	if ( optind == argc &&
	     read_files.length() == 0 &&
	     interfaces.length() == 0 &&
	     ! id_name && ! command_line_policy && ! print_plugins )
		add_input_file("-");

	// Process remaining arguments. X=Y arguments indicate script
	// variable/parameter assignments. X::Y arguments indicate plugins to
	// activate/query. The remainder are treated as scripts to load.
	while ( optind < argc )
		{
		if ( strchr(argv[optind], '=') )
			params.push_back(argv[optind++]);
		else if ( strstr(argv[optind], "::") )
			requested_plugins.insert(argv[optind++]);
		else
			add_input_file(argv[optind++]);
		}

	push_scope(nullptr, nullptr);

	dns_mgr = new DNS_Mgr(dns_type);

	// It would nice if this were configurable.  This is similar to the
	// chicken and the egg problem.  It would be configurable by parsing
	// policy, but we can't parse policy without DNS resolution.
	dns_mgr->SetDir(".state");

	iosource_mgr = new iosource::Manager();
	event_registry = new EventRegistry();
	analyzer_mgr = new analyzer::Manager();
	log_mgr = new logging::Manager();
	input_mgr = new input::Manager();
	file_mgr = new file_analysis::Manager();
	broker_mgr = new bro_broker::Manager(read_files.length() > 0);

	plugin_mgr->InitPreScript();
	analyzer_mgr->InitPreScript();
	file_mgr->InitPreScript();
	zeekygen_mgr->InitPreScript();

	bool missing_plugin = false;

	for ( set<string>::const_iterator i = requested_plugins.begin();
	      i != requested_plugins.end(); i++ )
		{
		if ( ! plugin_mgr->ActivateDynamicPlugin(*i) )
			missing_plugin = true;
		}

	if ( missing_plugin )
		reporter->FatalError("Failed to activate requested dynamic plugin(s).");

	plugin_mgr->ActivateDynamicPlugins(! bare_mode);

	init_event_handlers();

	md5_type = new OpaqueType("md5");
	sha1_type = new OpaqueType("sha1");
	sha256_type = new OpaqueType("sha256");
	entropy_type = new OpaqueType("entropy");
	cardinality_type = new OpaqueType("cardinality");
	topk_type = new OpaqueType("topk");
	bloomfilter_type = new OpaqueType("bloomfilter");
	x509_opaque_type = new OpaqueType("x509");
	ocsp_resp_opaque_type = new OpaqueType("ocsp_resp");
	paraglob_type = new OpaqueType("paraglob");

	// The leak-checker tends to produce some false
	// positives (memory which had already been
	// allocated before we start the checking is
	// nevertheless reported; see perftools docs), thus
	// we suppress some messages here.

#ifdef USE_PERFTOOLS_DEBUG
	{
	HeapLeakChecker::Disabler disabler;
#endif

	is_parsing = true;
	yyparse();
	is_parsing = false;

	RecordVal::ResizeParseTimeRecords();

	init_general_global_var();
	init_net_var();
	init_builtin_funcs_subdirs();

	// Must come after plugin activation (and also after hash
	// initialization).
	binpac::FlowBuffer::Policy flowbuffer_policy;
	flowbuffer_policy.max_capacity = global_scope()->Lookup(
		"BinPAC::flowbuffer_capacity_max")->ID_Val()->AsCount();
	flowbuffer_policy.min_capacity = global_scope()->Lookup(
		"BinPAC::flowbuffer_capacity_min")->ID_Val()->AsCount();
	flowbuffer_policy.contract_threshold = global_scope()->Lookup(
		"BinPAC::flowbuffer_contract_threshold")->ID_Val()->AsCount();
	binpac::init(&flowbuffer_policy);

	plugin_mgr->InitBifs();

	if ( reporter->Errors() > 0 )
		exit(1);

	plugin_mgr->InitPostScript();
	zeekygen_mgr->InitPostScript();
	broker_mgr->InitPostScript();

	if ( print_plugins )
		{
		bool success = show_plugins(print_plugins);
		exit(success ? 0 : 1);
		}

	analyzer_mgr->InitPostScript();
	file_mgr->InitPostScript();
	dns_mgr->InitPostScript();

	if ( parse_only )
		{
		int rc = (reporter->Errors() > 0 ? 1 : 0);
		exit(rc);
		}

#ifdef USE_PERFTOOLS_DEBUG
	}
#endif

	if ( reporter->Errors() > 0 )
		{
		delete dns_mgr;
		exit(1);
		}

	reporter->InitOptions();
	zeekygen_mgr->GenerateDocs();

	if ( user_pcap_filter )
		{
		ID* id = global_scope()->Lookup("cmd_line_bpf_filter");

		if ( ! id )
			reporter->InternalError("global cmd_line_bpf_filter not defined");

		id->SetVal(new StringVal(user_pcap_filter));
		}

	// Parse rule files defined on the script level.
	char* script_rule_files =
		copy_string(internal_val("signature_files")->AsString()->CheckString());

	char* tmp = script_rule_files;
	char* s;
	while ( (s = strsep(&tmp, " \t")) )
		if ( *s )
			rule_files.append(s);

	// Append signature files defined in @load-sigs
	for ( size_t i = 0; i < sig_files.size(); ++i )
		rule_files.append(copy_string(sig_files[i].c_str()));

	if ( rule_files.length() > 0 )
		{
		rule_matcher = new RuleMatcher(RE_level);
		if ( ! rule_matcher->ReadFiles(rule_files) )
			{
			delete dns_mgr;
			exit(1);
			}

		if ( rule_debug )
			rule_matcher->PrintDebug();

		file_mgr->InitMagic();
		}

	delete [] script_rule_files;

	if ( g_policy_debug )
		// ### Add support for debug command file.
		dbg_init_debugger(0);

	if ( read_files.length() == 0 && interfaces.length() == 0 )
		{
		Val* interfaces_val = internal_val("interfaces");
		if ( interfaces_val )
			{
			char* interfaces_str =
				interfaces_val->AsString()->Render();

			if ( interfaces_str[0] != '\0' )
				add_to_name_list(interfaces_str, ' ', interfaces);

			delete [] interfaces_str;
			}
		}

	if ( dns_type != DNS_PRIME )
		net_init(interfaces, read_files, writefile, do_watchdog);

	net_done = internal_handler("net_done");

	if ( ! g_policy_debug )
		{
		(void) setsignal(SIGTERM, sig_handler);
		(void) setsignal(SIGINT, sig_handler);
		(void) setsignal(SIGPIPE, SIG_IGN);
		}

	// Cooperate with nohup(1).
	if ( (oldhandler = setsignal(SIGHUP, sig_handler)) != SIG_DFL )
		(void) setsignal(SIGHUP, oldhandler);

	if ( dns_type == DNS_PRIME )
		{
		dns_mgr->Verify();
		dns_mgr->Resolve();

		if ( ! dns_mgr->Save() )
			reporter->FatalError("can't update DNS cache");

		mgr.Drain();
		delete dns_mgr;
		exit(0);
		}

	// Print the ID.
	if ( id_name )
		{
		ID* id = global_scope()->Lookup(id_name);
		if ( ! id )
			reporter->FatalError("No such ID: %s\n", id_name);

		ODesc desc;
		desc.SetQuotes(true);
		desc.SetIncludeStats(true);
		id->DescribeExtended(&desc);

		fprintf(stdout, "%s\n", desc.Description());
		exit(0);
		}

	if ( profiling_interval > 0 )
		{
		profiling_logger = new ProfileLogger(profiling_file->AsFile(),
			profiling_interval);

		if ( segment_profiling )
			segment_logger = profiling_logger;
		}

	if ( ! reading_live && ! reading_traces )
		// Set up network_time to track real-time, since
		// we don't have any other source for it.
		net_update_time(current_time());

	EventHandlerPtr zeek_init = internal_handler("zeek_init");
	if ( zeek_init )	//### this should be a function
		mgr.QueueEventFast(zeek_init, val_list{});

	EventRegistry::string_list* dead_handlers =
		event_registry->UnusedHandlers();

	if ( dead_handlers->length() > 0 && check_for_unused_event_handlers )
		{
		for ( int i = 0; i < dead_handlers->length(); ++i )
			reporter->Warning("event handler never invoked: %s", (*dead_handlers)[i]);
		}

	delete dead_handlers;

	EventRegistry::string_list* alive_handlers =
		event_registry->UsedHandlers();

	if ( alive_handlers->length() > 0 && dump_used_event_handlers )
		{
		reporter->Info("invoked event handlers:");
		for ( int i = 0; i < alive_handlers->length(); ++i )
			reporter->Info("%s", (*alive_handlers)[i]);
		}

	delete alive_handlers;

	if ( stmts )
		{
		stmt_flow_type flow;
		Frame f(current_scope()->Length(), 0, 0);
		g_frame_stack.push_back(&f);

		try
			{
			stmts->Exec(&f, flow);
			}
		catch ( InterpreterException& )
			{
			reporter->FatalError("failed to execute script statements at top-level scope");
			}

		g_frame_stack.pop_back();
		}

	if ( override_ignore_checksums )
		ignore_checksums = 1;

	if ( zeek_script_loaded )
		{
		// Queue events reporting loaded scripts.
		for ( std::list<ScannedFile>::iterator i = files_scanned.begin(); i != files_scanned.end(); i++ )
			{
			if ( i->skipped )
				continue;

			mgr.QueueEventFast(zeek_script_loaded, {
				new StringVal(i->name.c_str()),
				val_mgr->GetCount(i->include_level),
			});
			}
		}

	reporter->ReportViaEvents(true);

	// Drain the event queue here to support the protocols framework configuring DPM
	mgr.Drain();

	if ( reporter->Errors() > 0 && ! zeekenv("ZEEK_ALLOW_INIT_ERRORS") )
		reporter->FatalError("errors occurred while initializing");

	broker_mgr->ZeekInitDone();
	reporter->ZeekInitDone();
	analyzer_mgr->DumpDebug();

	have_pending_timers = ! reading_traces && timer_mgr->Size() > 0;

	iosource_mgr->Register(thread_mgr, true);

	if ( iosource_mgr->Size() > 0 ||
	     have_pending_timers ||
	     BifConst::exit_only_after_terminate )
		{
		if ( profiling_logger )
			profiling_logger->Log();

#ifdef USE_PERFTOOLS_DEBUG
		if ( perftools_leaks )
			heap_checker = new HeapLeakChecker("net_run");

		if ( perftools_profile )
			{
			HeapProfilerStart("heap");
			HeapProfilerDump("pre net_run");
			}

#endif

		double time_net_start = current_time(true);;

		uint64 mem_net_start_total;
		uint64 mem_net_start_malloced;

		if ( time_bro )
			{
			get_memory_usage(&mem_net_start_total, &mem_net_start_malloced);

			fprintf(stderr, "# initialization %.6f\n", time_net_start - time_start);

			fprintf(stderr, "# initialization %" PRIu64 "M/%" PRIu64 "M\n",
				mem_net_start_total / 1024 / 1024,
				mem_net_start_malloced / 1024 / 1024);
			}

		net_run();

		double time_net_done = current_time(true);;

		uint64 mem_net_done_total;
		uint64 mem_net_done_malloced;

		if ( time_bro )
			{
			get_memory_usage(&mem_net_done_total, &mem_net_done_malloced);

			fprintf(stderr, "# total time %.6f, processing %.6f\n",
				time_net_done - time_start, time_net_done - time_net_start);

			fprintf(stderr, "# total mem %" PRId64 "M/%" PRId64 "M, processing %" PRId64 "M/%" PRId64 "M\n",
				mem_net_done_total / 1024 / 1024,
				mem_net_done_malloced / 1024 / 1024,
				(mem_net_done_total - mem_net_start_total) / 1024 / 1024,
				(mem_net_done_malloced - mem_net_start_malloced) / 1024 / 1024);
			}

		done_with_network();
		net_delete();

		terminate_bro();

		sqlite3_shutdown();

		ERR_free_strings();
		EVP_cleanup();
		CRYPTO_cleanup_all_ex_data();

		// Close files after net_delete(), because net_delete()
		// might write to connection content files.
		BroFile::CloseOpenFiles();
		}
	else
		{
		terminate_bro();
		}

	delete rule_matcher;

	return 0;
	}