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shorewall_code/Shorewall/Perl/Shorewall/Config.pm
Tom Eastep d7cbd1da21 Allow actions to manipulate the current comment from Perl. 
- Added set_comment()
- moved push/pop_comment() to the :DEFAULT export
2013-09-23 12:21:44 -07:00

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#
# Shorewall 4.4 -- /usr/share/shorewall/Shorewall/Config.pm
#
# This program is under GPL [http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt]
#
# (c) 2007,2008,2009,2010,2011,2012,2013 - Tom Eastep (teastep@shorewall.net)
#
# Complete documentation is available at http://shorewall.net
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of Version 2 of the GNU General Public License
# as published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#
# This module is responsible for lower level configuration file handling.
# It also exports functions for generating warning and error messages.
# The get_configuration function parses the shorewall.conf, capabilities and
# modules files during compiler startup. The module also provides the basic
# output file services such as creation of temporary 'script' files, writing
# into those files (emitters) and finalizing those files (renaming
# them to their final name and setting their mode appropriately).
#
package Shorewall::Config;
use strict;
use warnings;
use File::Basename;
use File::Temp qw/ tempfile tempdir /;
use Cwd qw(abs_path getcwd);
use autouse 'Carp' => qw(longmess confess);
use Scalar::Util 'reftype';
use FindBin;
our @ISA = qw(Exporter);
#
# Imported variables should be treated as read-only by importers
#
our @EXPORT = qw(
warning_message
fatal_error
assert
currentlineinfo
shortlineinfo
clear_currentfilename
validate_level
progress_message
progress_message_nocompress
progress_message2
progress_message3
supplied
split_list
shorewall
get_action_params
get_action_chain
get_action_chain_name
set_action_name_to_caller
get_action_logging
get_action_disposition
set_action_disposition
set_action_param
get_inline_matches
set_inline_matches
set_comment
push_comment
pop_comment
have_capability
require_capability
report_used_capabilities
kernel_version
);
our @EXPORT_OK = qw( $shorewall_dir initialize shorewall);
our %EXPORT_TAGS = ( internal => [ qw( create_temp_script
finalize_script
enable_script
disable_script
numeric_value
numeric_value1
normalize_hex
hex_value
in_hex
in_hex2
in_hex3
in_hex4
in_hex8
in_hexp
emit
emitstd
emit_unindented
save_progress_message
save_progress_message_short
set_timestamp
set_verbosity
set_log
set_config_path
close_log
set_command
push_indent
pop_indent
copy
copy1
copy2
create_temp_aux_config
finalize_aux_config
set_shorewall_dir
set_debug
find_file
split_list
split_list1
split_list2
split_line
split_line1
first_entry
open_file
close_file
push_open
pop_open
push_action_params
pop_action_params
default_action_params
read_a_line
which
qt
ensure_config_path
add_param
export_params
get_configuration
report_capabilities
propagateconfig
append_file
run_user_exit
run_user_exit1
run_user_exit2
generate_aux_config
format_warning
process_comment
no_comment
macro_comment
dump_mark_layout
$product
$Product
$toolname
$command
$doing
$done
$currentline
$currentfilename
$debug
$file_format
$comment
%config
%globals
%config_files
%shorewallrc
%shorewallrc1
%helpers
%helpers_map
%helpers_enabled
%helpers_aliases
%actparms
F_IPV4
F_IPV6
TCP
UDP
UDPLITE
ICMP
DCCP
IPv6_ICMP
SCTP
GRE
MIN_VERBOSITY
MAX_VERBOSITY
PLAIN_READ
EMBEDDED_ENABLED
EXPAND_VARIABLES
STRIP_COMMENTS
SUPPRESS_WHITESPACE
CONFIG_CONTINUATION
DO_INCLUDE
NORMAL_READ
OPTIMIZE_POLICY_MASK
OPTIMIZE_POLICY_MASK2n4
OPTIMIZE_RULESET_MASK
OPTIMIZE_USE_FIRST
OPTIMIZE_ALL
) , ] ,
protocols => [ qw (
TCP
UDP
UDPLITE
ICMP
DCCP
IPv6_ICMP
SCTP
GRE
) , ],
);
Exporter::export_ok_tags('internal');
our $VERSION = '4.5.20-Beta1';
#
# describe the current command, it's present progressive, and it's completion.
#
our ($command, $doing, $done );
#
# VERBOSITY
#
our $verbosity;
#
# Logging
#
our ( $log, $log_verbosity );
#
# Timestamp each progress message, if true.
#
our $timestamp;
#
# Script (output) file handle
#
our $script;
#
# When 'true', writes to the script are enabled. Used to catch code emission between functions
#
our $script_enabled;
#
# True, if last line emitted is blank
#
our $lastlineblank;
#
# Tabs to indent the output
#
our $indent1;
#
# Characters to indent the output
#
our $indent2;
#
# Total indentation
#
our $indent;
#
# Script's Directory and File
#
our ( $dir, $file );
#
# Temporary output file's name
#
our $tempfile;
#
# Fully qualified name of the configuration file
#
our $configfile;
#
# Misc Globals exported to other modules
#
our %globals;
#
# From shorewall.conf file - exported to other modules.
#
our %config;
#
# Entries in shorewall.conf that have been renamed
#
our %renamed = ( AUTO_COMMENT => 'AUTOCOMMENT', BLACKLIST_LOGLEVEL => 'BLACKLIST_LOG_LEVEL' );
#
# Config options and global settings that are to be copied to output script
#
our @propagateconfig = qw/ DISABLE_IPV6 MODULESDIR MODULE_SUFFIX LOAD_HELPERS_ONLY SUBSYSLOCK LOG_VERBOSITY/;
#
# From parsing the capabilities file or detecting capabilities
#
our %capabilities;
#
# Capabilities
#
our %capdesc = ( NAT_ENABLED => 'NAT',
MANGLE_ENABLED => 'Packet Mangling',
MULTIPORT => 'Multi-port Match' ,
XMULTIPORT => 'Extended Multi-port Match',
EMULTIPORT => 'Enhanced Multi-port Match',
CONNTRACK_MATCH => 'Connection Tracking Match',
OLD_CONNTRACK_MATCH =>
'Old conntrack match syntax',
NEW_CONNTRACK_MATCH =>
'Extended Connection Tracking Match',
USEPKTTYPE => 'Packet Type Match',
POLICY_MATCH => 'Policy Match',
PHYSDEV_MATCH => 'Physdev Match',
PHYSDEV_BRIDGE => 'Physdev-is-bridged support',
LENGTH_MATCH => 'Packet length Match',
IPRANGE_MATCH => 'IP Range Match',
RECENT_MATCH => 'Recent Match',
OWNER_MATCH => 'Owner Match',
OWNER_NAME_MATCH
=> 'Owner Name Match',
IPSET_MATCH => 'Ipset Match',
OLD_IPSET_MATCH => 'Old Ipset Match',
IPSET_V5 => 'Version 5 ipsets',
CONNMARK => 'CONNMARK Target',
XCONNMARK => 'Extended CONNMARK Target',
CONNMARK_MATCH => 'Connmark Match',
XCONNMARK_MATCH => 'Extended Connmark Match',
RAW_TABLE => 'Raw Table',
IPP2P_MATCH => 'IPP2P Match',
OLD_IPP2P_MATCH => 'Old IPP2P Match Syntax',
CLASSIFY_TARGET => 'CLASSIFY Target',
ENHANCED_REJECT => 'Extended Reject',
KLUDGEFREE => 'Repeat match',
MARK => 'MARK Target',
XMARK => 'Extended Mark Target',
EXMARK => 'Extended Mark Target 2',
MANGLE_FORWARD => 'Mangle FORWARD Chain',
COMMENTS => 'Comments',
ADDRTYPE => 'Address Type Match',
TCPMSS_MATCH => 'TCPMSS Match',
HASHLIMIT_MATCH => 'Hashlimit Match',
NFQUEUE_TARGET => 'NFQUEUE Target',
REALM_MATCH => 'Realm Match',
HELPER_MATCH => 'Helper Match',
CONNLIMIT_MATCH => 'Connlimit Match',
TIME_MATCH => 'Time Match',
GOTO_TARGET => 'Goto Support',
LOG_TARGET => 'LOG Target',
ULOG_TARGET => 'ULOG Target',
NFLOG_TARGET => 'NFLOG Target',
LOGMARK_TARGET => 'LOGMARK Target',
IPMARK_TARGET => 'IPMARK Target',
PERSISTENT_SNAT => 'Persistent SNAT',
OLD_HL_MATCH => 'Old Hash Limit Match',
TPROXY_TARGET => 'TPROXY Target',
FLOW_FILTER => 'Flow Classifier',
FWMARK_RT_MASK => 'fwmark route mask',
MARK_ANYWHERE => 'Mark in the filter table',
HEADER_MATCH => 'Header Match',
ACCOUNT_TARGET => 'ACCOUNT Target',
AUDIT_TARGET => 'AUDIT Target',
RAWPOST_TABLE => 'Rawpost Table',
CONDITION_MATCH => 'Condition Match',
IPTABLES_S => 'iptables -S',
BASIC_FILTER => 'Basic Filter',
CT_TARGET => 'CT Target',
STATISTIC_MATCH =>
'Statistics Match',
IMQ_TARGET => 'IMQ Target',
DSCP_MATCH => 'DSCP Match',
DSCP_TARGET => 'DSCP Target',
GEOIP_MATCH => 'GeoIP Match' ,
RPFILTER_MATCH => 'RPFilter Match',
NFACCT_MATCH => 'NFAcct Match',
CHECKSUM_TARGET => 'Checksum Target',
ARPTABLESJF => 'Arptables JF',
MASQUERADE_TGT => 'MASQUERADE Target',
UDPLITEREDIRECT => 'UDPLITE Port Redirection',
NEW_TOS_MATCH => 'New tos Match',
AMANDA_HELPER => 'Amanda Helper',
FTP_HELPER => 'FTP Helper',
FTP0_HELPER => 'FTP-0 Helper',
H323_HELPER => 'H323 Helpers',
IRC_HELPER => 'IRC Helper',
IRC0_HELPER => 'IRC-0 Helper',
NETBIOS_NS_HELPER =>
'Netbios-ns Helper',
PPTP_HELPER => 'PPTP Helper',
SANE_HELPER => 'SANE Helper',
SANE0_HELPER => 'SANE-0 Helper',
SIP_HELPER => 'SIP Helper',
SIP0_HELPER => 'SIP-0 Helper',
SNMP_HELPER => 'SNMP Helper',
TFTP_HELPER => 'TFTP Helper',
TFTP0_HELPER => 'TFTP-0 Helper',
#
# Constants
#
LOG_OPTIONS => 'Log Options',
CAPVERSION => 'Capability Version',
KERNELVERSION => 'Kernel Version',
);
our %used;
use constant {
USED => 1,
REQUIRED => 2 };
use constant {
ICMP => 1,
TCP => 6,
UDP => 17,
DCCP => 33,
GRE => 47,
IPv6_ICMP => 58,
SCTP => 132,
UDPLITE => 136,
};
#
# Optimization masks
#
use constant {
OPTIMIZE_POLICY_MASK => 0x02 , # Call optimize_policy_chains()
OPTIMIZE_POLICY_MASK2n4 => 0x06 ,
OPTIMIZE_RULESET_MASK => 0x1C , # Call optimize_ruleset()
OPTIMIZE_ALL => 0x1F , # Maximum value for documented categories.
OPTIMIZE_USE_FIRST => 0x1000 # Always use interface 'first' chains -- undocumented
};
our %helpers = ( amanda => UDP,
ftp => TCP,
irc => TCP,
'netbios-ns' => UDP,
pptp => TCP,
'Q.931' => TCP,
RAS => UDP,
sane => TCP,
sip => UDP,
snmp => UDP,
tftp => UDP,
);
our %helpers_map;
our %helpers_names;
our %helpers_aliases;
our %helpers_enabled;
our %config_files = ( #accounting => 1,
actions => 1,
blacklist => 1,
clear => 1,
conntrack => 1,
ecn => 1,
findgw => 1,
hosts => 1,
init => 1,
initdone => 1,
interfaces => 1,
isusable => 1,
maclist => 1,
masq => 1,
nat => 1,
netmap => 1,
notrack => 1,
params => 1,
policy => 1,
providers => 1,
proxyarp => 1,
refresh => 1,
refreshed => 1,
restored => 1,
rawnat => 1,
route_rules => 1,
routes => 1,
routestopped => 1,
rtrules => 1,
rules => 1,
scfilter => 1,
secmarks => 1,
start => 1,
started => 1,
stop => 1,
stopped => 1,
stoppedrules => 1,
tcclasses => 1,
tcclear => 1,
tcdevices => 1,
tcfilters => 1,
tcinterfaces => 1,
tcpri => 1,
tcrules => 1,
tos => 1,
tunnels => 1,
zones => 1 );
#
# Options that involve the the AUDIT target
#
our @auditoptions = qw( BLACKLIST_DISPOSITION MACLIST_DISPOSITION TCP_FLAGS_DISPOSITION );
#
# Directories to search for configuration files
#
our @config_path;
#
# Stash away file references here when we encounter INCLUDE
#
our @includestack;
#
# Allow nested opens
#
our @openstack;
#
# From the params file
#
our %params;
#
# Entries that the compiler adds to %params
#
our %compiler_params;
#
# Action parameters
#
our %actparms;
our $parmsmodified;
our $inline_matches;
our $currentline; # Current config file line image
our $currentfile; # File handle reference
our $currentfilename; # File NAME
our $currentlinenumber; # Line number
our $perlscript; # File Handle Reference to current temporary file being written by an in-line Perl script
our $perlscriptname; # Name of that file.
our $embedded; # True if we're in an embedded perl script
our @tempfiles; # Files that need unlinking at END
our $first_entry; # Message to output or function to call on first non-blank line of a file
our $file_format; # Format of configuration file.
our $max_format; # Max format value
our $comment; # Current COMMENT
our $comments_allowed; # True if [?]COMMENT is allowed in the current file
our $nocomment; # When true, ignore [?]COMMENT in the current file
our $warningcount; # Used to suppress duplicate warnings about missing COMMENT support
our $warningcount1; # Used to suppress duplicate warnings about COMMENT being deprecated
our $warningcount2; # Used to suppress duplicate warnings about FORMAT being deprecated
our $shorewall_dir; # Shorewall Directory; if non-empty, search here first for files.
our $debug; # Global debugging flag
our $confess; # If true, use Carp to report errors with stack trace.
our $family; # Protocol family (4 or 6)
our $toolname; # Name of the tool to use (iptables or iptables6)
our $toolNAME; # Tool name in CAPS
our $product; # Name of product that will run the generated script
our $Product; # $product with initial cap.
our $sillyname; # Name of temporary filter chains for testing capabilities
our $sillyname1;
our $iptables; # Path to iptables/ip6tables
our $iptablesw; # True of iptables supports the -w option
our $tc; # Path to tc
our $ip; # Path to ip
our $shell; # Type of shell that processed the params file
use constant { BASH => 1,
OLDBASH => 2,
ASH => 3 };
use constant { MIN_VERBOSITY => -1,
MAX_VERBOSITY => 2 ,
F_IPV4 => 4,
F_IPV6 => 6,
};
our %validlevels; # Valid log levels.
#
# Deprecated options with their default values
#
our %deprecated = ( LOGRATE => '' ,
LOGBURST => '' ,
EXPORTPARAMS => 'no',
WIDE_TC_MARKS => 'no',
HIGH_ROUTE_MARKS => 'no',
BLACKLISTNEWONLY => 'yes',
);
#
# Deprecated options that are eliminated via update
#
our %converted = ( WIDE_TC_MARKS => 1,
HIGH_ROUTE_MARKS => 1,
BLACKLISTNEWONLY => 1,
);
#
# Variables involved in ?IF, ?ELSE ?ENDIF processing
#
our $omitting;
our @ifstack;
our $ifstack;
#
# Entries on the ifstack are a 4-tuple:
#
# [0] - Keyword (IF, ELSEIF, ELSE or ENDIF)
# [1] - True if the outermost IF evaluated to false
# [2] - True if the the last unterminated IF evaluated to false
#
# From .shorewallrc
#
our ( %shorewallrc, %shorewallrc1 );
#
# read_a_line options
#
use constant { PLAIN_READ => 0, # No read_a_line options
EMBEDDED_ENABLED => 1, # Look for embedded Shell and Perl
EXPAND_VARIABLES => 2, # Expand Shell variables
STRIP_COMMENTS => 4, # Remove comments
SUPPRESS_WHITESPACE => 8, # Ignore blank lines
CHECK_GUNK => 16, # Look for unprintable characters
CONFIG_CONTINUATION => 32, # Suppress leading whitespace if
# continued line ends in ',' or ':'
DO_INCLUDE => 64, # Look for INCLUDE <filename>
NORMAL_READ => -1 # All options
};
our %variables; # Symbol table for expanding shell variables
sub process_shorewallrc($$);
sub add_variables( \% );
#
# Rather than initializing globals in an INIT block or during declaration,
# we initialize them in a function. This is done for two reasons:
#
# 1. Proper initialization depends on the address family which isn't
# known until the compiler has started.
#
# 2. The compiler can run multiple times in the same process so it has to be
# able to re-initialize its dependent modules' state.
#
sub initialize( $;$$) {
( $family, my ( $shorewallrc, $shorewallrc1 ) ) = @_;
if ( $family == F_IPV4 ) {
( $product, $Product, $toolname, $toolNAME ) = qw( shorewall Shorewall iptables IPTABLES );
} else {
( $product, $Product, $toolname, $toolNAME ) = qw( shorewall6 Shorewall6 ip6tables IP6TABLES );
}
$verbosity = 0; # Verbosity setting. -1 = silent, 0 = almost silent, 1 = major progress messages only, 2 = all progress messages (very noisy)
$log = undef; # File reference for log file
$log_verbosity = -1; # Verbosity of log.
$timestamp = ''; # If true, we are to timestamp each progress message
$script = 0; # Script (output) file Handle Reference
$script_enabled = 0; # Writing to output file is disabled initially
$lastlineblank = 0; # Avoid extra blank lines in the output
$indent1 = ''; # Current indentation tabs
$indent2 = ''; # Current indentation spaces
$indent = ''; # Current total indentation
( $dir, $file ) = ('',''); # Script's Directory and Filename
$tempfile = ''; # Temporary File Name
$sillyname =
$sillyname1 = ''; # Temporary ipchains
$omitting = 0;
$ifstack = 0;
@ifstack = ();
$embedded = 0;
#
# Contents of last COMMENT line.
#
$comment = '';
$warningcount = 0;
$warningcount1 = 0;
$warningcount2 = 0;
#
# Misc Globals
#
%globals = ( SHAREDIRPL => '' ,
CONFIGDIR => '', # Compile-time configuration directory (location of $product.conf)
ESTABLISHED_DISPOSITION => 'ACCEPT',
LOGPARMS => '',
TC_SCRIPT => '',
EXPORT => 0,
KLUDGEFREE => '',
VERSION => "4.5.19-Beta1",
CAPVERSION => 40515 ,
);
#
# From shorewall.conf file
#
%config =
( STARTUP_ENABLED => undef,
VERBOSITY => undef,
#
# Logging
#
LOGFILE => undef,
LOGFORMAT => undef,
LOGTAGONLY => undef,
LOGLIMIT => undef,
LOGRATE => undef,
LOGBURST => undef,
LOGALLNEW => undef,
BLACKLIST_LOG_LEVEL => undef,
RELATED_LOG_LEVEL => undef,
RFC1918_LOG_LEVEL => undef,
MACLIST_LOG_LEVEL => undef,
TCP_FLAGS_LOG_LEVEL => undef,
SMURF_LOG_LEVEL => undef,
LOG_MARTIANS => undef,
LOG_VERBOSITY => undef,
STARTUP_LOG => undef,
SFILTER_LOG_LEVEL => undef,
RPFILTER_LOG_LEVEL => undef,
INVALID_LOG_LEVEL => undef,
UNTRACKED_LOG_LEVEL => undef,
#
# Location of Files
#
IP => undef,
TC => undef,
IPSET => undef,
PERL => undef,
PATH => undef,
SHOREWALL_SHELL => undef,
SUBSYSLOCK => undef,
MODULESDIR => undef,
CONFIG_PATH => undef,
RESTOREFILE => undef,
IPSECFILE => undef,
LOCKFILE => undef,
GEOIPDIR => undef,
NFACCT => undef,
#
# Default Actions/Macros
#
DROP_DEFAULT => undef,
REJECT_DEFAULT => undef,
ACCEPT_DEFAULT => undef,
QUEUE_DEFAULT => undef,
NFQUEUE_DEFAULT => undef,
#
# RSH/RCP Commands
#
RSH_COMMAND => undef,
RCP_COMMAND => undef,
#
# Firewall Options
#
BRIDGING => undef,
IP_FORWARDING => undef,
ADD_IP_ALIASES => undef,
ADD_SNAT_ALIASES => undef,
RETAIN_ALIASES => undef,
TC_ENABLED => undef,
TC_EXPERT => undef,
TC_PRIOMAP => undef,
CLEAR_TC => undef,
MARK_IN_FORWARD_CHAIN => undef,
CLAMPMSS => undef,
ROUTE_FILTER => undef,
DETECT_DNAT_IPADDRS => undef,
MUTEX_TIMEOUT => undef,
ADMINISABSENTMINDED => undef,
BLACKLIST => undef,
BLACKLISTNEWONLY => undef,
DELAYBLACKLISTLOAD => undef,
MODULE_SUFFIX => undef,
DISABLE_IPV6 => undef,
DYNAMIC_ZONES => undef,
PKTTYPE=> undef,
MACLIST_TABLE => undef,
MACLIST_TTL => undef,
SAVE_IPSETS => undef,
SAVE_ARPTABLES => undef,
MAPOLDACTIONS => undef,
FASTACCEPT => undef,
IMPLICIT_CONTINUE => undef,
IPSET_WARNINGS => undef,
HIGH_ROUTE_MARKS => undef,
USE_ACTIONS=> undef,
OPTIMIZE => undef,
EXPORTPARAMS => undef,
SHOREWALL_COMPILER => undef,
EXPAND_POLICIES => undef,
KEEP_RT_TABLES => undef,
DELETE_THEN_ADD => undef,
MULTICAST => undef,
DONT_LOAD => '',
AUTOCOMMENT => undef ,
MANGLE_ENABLED => undef ,
RFC1918_STRICT => undef ,
NULL_ROUTE_RFC1918 => undef ,
USE_DEFAULT_RT => undef ,
RESTORE_DEFAULT_ROUTE => undef ,
FAST_STOP => undef ,
AUTOMAKE => undef ,
WIDE_TC_MARKS => undef,
TRACK_PROVIDERS => undef,
ZONE2ZONE => undef,
ACCOUNTING => undef,
OPTIMIZE_ACCOUNTING => undef,
ACCOUNTING_TABLE => undef,
DYNAMIC_BLACKLIST => undef,
LOAD_HELPERS_ONLY => undef,
REQUIRE_INTERFACE => undef,
FORWARD_CLEAR_MARK => undef,
COMPLETE => undef,
EXPORTMODULES => undef,
LEGACY_FASTSTART => undef,
USE_PHYSICAL_NAMES => undef,
HELPERS => undef,
AUTOHELPERS => undef,
RESTORE_ROUTEMARKS => undef,
IGNOREUNKNOWNVARIABLES => undef,
WARNOLDCAPVERSION => undef,
DEFER_DNS_RESOLUTION => undef,
USE_RT_NAMES => undef,
CHAIN_SCRIPTS => undef,
TRACK_RULES => undef,
REJECT_ACTION => undef,
#
# Packet Disposition
#
MACLIST_DISPOSITION => undef,
TCP_FLAGS_DISPOSITION => undef,
BLACKLIST_DISPOSITION => undef,
SMURF_DISPOSITION => undef,
SFILTER_DISPOSITION => undef,
RPFILTER_DISPOSITION => undef,
RELATED_DISPOSITION => undef,
INVALID_DISPOSITION => undef,
UNTRACKED_DISPOSITION => undef,
#
# Mark Geometry
#
TC_BITS => undef,
PROVIDER_BITS => undef,
PROVIDER_OFFSET => undef,
MASK_BITS => undef,
ZONE_BITS => undef,
);
#
# Valid log levels
#
# Note that we don't include LOGMARK; that is so we can default its
# priority to 'info' (LOGMARK itself defaults to 'warn').
#
%validlevels = ( DEBUG => 7,
INFO => 6,
NOTICE => 5,
WARNING => 4,
WARN => 4,
ERR => 3,
ERROR => 3,
CRIT => 2,
ALERT => 1,
EMERG => 0,
PANIC => 0,
NONE => '',
NFLOG => 'NFLOG',
LOGMARK => 'LOGMARK',
);
#
# From parsing the capabilities file or capabilities detection
#
%capabilities =
( NAT_ENABLED => undef,
MANGLE_ENABLED => undef,
MULTIPORT => undef,
XMULTIPORT => undef,
EMULTIPORT => undef,
CONNTRACK_MATCH => undef,
NEW_CONNTRACK_MATCH => undef,
OLD_CONNTRACK_MATCH => undef,
USEPKTTYPE => undef,
POLICY_MATCH => undef,
PHYSDEV_MATCH => undef,
PHYSDEV_BRIDGE => undef,
LENGTH_MATCH => undef,
IPRANGE_MATCH => undef,
RECENT_MATCH => undef,
OWNER_MATCH => undef,
OWNER_NAME_MATCH => undef,
IPSET_MATCH => undef,
OLD_IPSET_MATCH => undef,
IPSET_V5 => undef,
CONNMARK => undef,
XCONNMARK => undef,
CONNMARK_MATCH => undef,
XCONNMARK_MATCH => undef,
RAW_TABLE => undef,
RAWPOST_TABLE => undef,
IPP2P_MATCH => undef,
OLD_IPP2P_MATCH => undef,
CLASSIFY_TARGET => undef,
ENHANCED_REJECT => undef,
KLUDGEFREE => undef,
MARK => undef,
XMARK => undef,
EXMARK => undef,
MANGLE_FORWARD => undef,
COMMENTS => undef,
ADDRTYPE => undef,
TCPMSS_MATCH => undef,
HASHLIMIT_MATCH => undef,
NFQUEUE_TARGET => undef,
REALM_MATCH => undef,
HELPER_MATCH => undef,
CONNLIMIT_MATCH => undef,
TIME_MATCH => undef,
GOTO_TARGET => undef,
LOG_TARGET => 1, # Assume that we have it.
ULOG_TARGET => undef,
NFLOG_TARGET => undef,
LOGMARK_TARGET => undef,
IPMARK_TARGET => undef,
TPROXY_TARGET => undef,
PERSISTENT_SNAT => undef,
OLD_HL_MATCH => undef,
FLOW_FILTER => undef,
FWMARK_RT_MASK => undef,
MARK_ANYWHERE => undef,
HEADER_MATCH => undef,
ACCOUNT_TARGET => undef,
AUDIT_TARGET => undef,
CONDITION_MATCH => undef,
IPTABLES_S => undef,
BASIC_FILTER => undef,
CT_TARGET => undef,
STATISTIC_MATCH => undef,
IMQ_TARGET => undef,
DSCP_MATCH => undef,
DSCP_TARGET => undef,
GEOIP_MATCH => undef,
RPFILTER_MATCH => undef,
NFACCT_MATCH => undef,
CHECKSUM_TARGET => undef,
ARPTABLESJF => undef,
MASQUERADE_TGT => undef,
UDPLITEREDIRECT => undef,
NEW_TOS_MATCH => undef,
AMANDA_HELPER => undef,
FTP_HELPER => undef,
FTP0_HELPER => undef,
H323_HELPER => undef,
IRC_HELPER => undef,
IRC0_HELPER => undef,
NETBIOS_NS_HELPER => undef,
PPTP_HELPER => undef,
SANE_HELPER => undef,
SANE0_HELPER => undef,
SIP_HELPER => undef,
SIP0_HELPER => undef,
SNMP_HELPER => undef,
TFTP_HELPER => undef,
TFTP0_HELPER => undef,
CAPVERSION => undef,
LOG_OPTIONS => 1,
KERNELVERSION => undef,
);
#
# Directories to search for configuration files
#
@config_path = ();
#
# Stash away file references here when we encounter INCLUDE
#
@includestack = ();
#
# Allow nested opens
#
@openstack = ();
$currentline = ''; # Line image
$currentfile = undef; # File handle reference
$currentfilename = ''; # File NAME
$currentlinenumber = 0; # Line number
$first_entry = 0; # Message to output or function to call on first non-blank file entry
$max_format = 1;
$comments_allowed = 0;
$nocomment = 0;
$shorewall_dir = ''; #Shorewall Directory
$debug = 0;
$confess = 0;
%params = ();
%compiler_params = ();
%actparms = ( 0 => 0, loglevel => '', logtag => '', chain => '', disposition => '', caller => '' );
$parmsmodified = 0;
%helpers_enabled = (
amanda => 1,
ftp => 1,
'ftp-0' => 1,
h323 => 1,
irc => 1,
'irc-0' => 1,
'netbios-ns' => 1,
pptp => 1,
sane => 1,
'sane-0' => 1,
sip => 1,
'sip-0' => 1,
snmp => 1,
tftp => 1,
'tftp-0' => 1,
);
%helpers_map = ( amanda => 'AMANDA_HELPER',
ftp => 'FTP_HELPER',
irc => 'IRC_HELPER',
'netbios-ns' => 'NETBIOS_NS_HELPER',
pptp => 'PPTP_HELPER',
'Q.931' => 'H323_HELPER',
RAS => 'H323_HELPER',
sane => 'SANE_HELPER',
sip => 'SIP_HELPER',
snmp => 'SNMP_HELPER',
tftp => 'TFTP_HELPER',
);
%helpers_aliases = ( amanda => 'amanda',
ftp => 'ftp',
irc => 'irc',
'netbios-ns' => 'netbios-ns',
pptp => 'pptp',
'Q.931' => 'Q.931',
RAS => 'RAS',
sane => 'sane',
sip => 'sip',
snmp => 'snmp',
tftp => 'tftp',
);
%shorewallrc = (
SHAREDIR => '/usr/share/',
CONFDIR => '/etc/',
);
%variables = %ENV;
#
# If we are compiling for export, process the shorewallrc from the remote system
#
if ( $shorewallrc1 ) {
process_shorewallrc( $shorewallrc1,
$family == F_IPV4 ? 'shorewall-lite' : 'shorewall6-lite'
);
%shorewallrc1 = %shorewallrc;
%shorewallrc = (
SHAREDIR => '/usr/share/',
CONFDIR => '/etc/',
);
}
#
# Process the global shorewallrc file
#
# Note: The build file executes this function passing only the protocol family
#
process_shorewallrc( $shorewallrc,
$family == F_IPV4 ? 'shorewall' : 'shorewall6'
) if defined $shorewallrc;
$globals{SHAREDIRPL} = "$shorewallrc{SHAREDIR}/shorewall/";
if ( $family == F_IPV4 ) {
$globals{SHAREDIR} = "$shorewallrc{SHAREDIR}/shorewall";
$globals{PRODUCT} = 'shorewall';
$config{IPTABLES} = undef;
$config{ARPTABLES} = undef;
$validlevels{ULOG} = 'ULOG';
} else {
$globals{SHAREDIR} = "$shorewallrc{SHAREDIR}/shorewall6";
$globals{PRODUCT} = 'shorewall6';
$config{IP6TABLES} = undef;
delete $config{ARPTABLES};
}
%shorewallrc1 = %shorewallrc unless $shorewallrc1;
add_variables %shorewallrc1;
}
my @abbr = qw( Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec );
#
# Create 'currentlineinfo'
#
sub currentlineinfo() {
my $linenumber = $currentlinenumber || 1;
if ( $currentfile ) {
my $lineinfo = " $currentfilename ";
if ( $linenumber eq 'EOF' ) {
$lineinfo .= '(EOF)'
} else {
$lineinfo .= "(line $linenumber)";
}
#
# Unwind the current include stack
#
for ( my $i = @includestack - 1; $i >= 0; $i-- ) {
my $info = $includestack[$i];
$linenumber = $info->[2] || 1;
$lineinfo .= "\n from $info->[1] (line $linenumber)";
}
#
# Now unwind the open stack; each element is an include stack
#
for ( my $i = @openstack - 1; $i >= 0; $i-- ) {
my $istack = $openstack[$i];
for ( my $j = ( @$istack - 1 ); $j >= 0; $j-- ) {
my $info = $istack->[$j];
$linenumber = $info->[2] || 1;
$lineinfo .= "\n from $info->[1] (line $linenumber)";
}
}
$lineinfo;
} else {
'';
}
}
sub shortlineinfo( $ ) {
if ( $config{TRACK_RULES} ) {
if ( $currentfile ) {
my $comment = '@@@ '. join( ':', $currentfilename, $currentlinenumber ) . ' @@@';
$comment = '@@@ ' . join( ':' , basename($currentfilename), $currentlinenumber) . ' @@@' if length $comment > 255;
$comment = '@@@ Filename Too Long @@@' if length $comment > 255;
$comment;
} else {
#
# Alternate lineinfo may have been passed
#
$_[0] || ''
}
}
}
sub handle_first_entry();
#
# Issue a Warning Message
#
sub warning_message
{
my $currentlineinfo = currentlineinfo;
our @localtime;
handle_first_entry if $first_entry;
$| = 1; #Reset output buffering (flush any partially filled buffers).
if ( $log ) {
@localtime = localtime;
printf $log '%s %2d %02d:%02d:%02d ', $abbr[$localtime[4]], @localtime[3,2,1,0];
}
if ( $confess ) {
print STDERR longmess( " WARNING: @_$currentlineinfo" );
print $log longmess( " WARNING: @_$currentlineinfo\n" ) if $log;
} else {
print STDERR " WARNING: @_$currentlineinfo\n";
print $log " WARNING: @_$currentlineinfo\n" if $log;
}
$| = 0; #Re-allow output buffering
}
#
# Q[uie]t version of system(). Returns true for success
#
sub qt( $ ) {
if ( $debug ) {
print "SYS----> @_\n";
system( "@_ 2>&1 < /dev/null" ) == 0;
} else {
system( "@_ > /dev/null 2>&1 < /dev/null" ) == 0;
}
}
sub qt0( $ ) {
if ( $debug ) {
print "SYS----> @_\n";
system( "@_ 2>&1 < /dev/null" );
} else {
system( "@_ > /dev/null 2>&1 < /dev/null" );
}
}
sub qt1( $ ) {
1 while qt0( "@_" ) == 4;
$? == 0;
}
#
# Delete the test chains
#
sub cleanup_iptables() {
qt1( "$iptables $iptablesw -F $sillyname" );
qt1( "$iptables $iptablesw -X $sillyname" );
qt1( "$iptables $iptablesw -F $sillyname1" );
qt1( "$iptables $iptablesw -X $sillyname1" );
if ( $capabilities{MANGLE_ENABLED} ) {
qt1( "$iptables $iptablesw -t mangle -F $sillyname" );
qt1( "$iptables $iptablesw -t mangle -X $sillyname" );
}
if ( $capabilities{NAT_ENABLED} ) {
qt1( "$iptables $iptablesw -t nat -F $sillyname" );
qt1( "$iptables $iptablesw -t nat -X $sillyname" );
}
if ( $capabilities{RAW_TABLE} ) {
qt1( "$iptables $iptablesw -t raw -F $sillyname" );
qt1( "$iptables $iptablesw -t raw -X $sillyname" );
}
$sillyname = $sillyname1 = undef;
$sillyname = '';
}
#
# Clean up after the compiler exits
#
sub cleanup() {
#
# Close files first in case we're running under Cygwin
#
close $script, $script = undef if $script;
close $perlscript, $perlscript = undef if $perlscript;
close $log, $log = undef if $log;
if ( $currentfile ) {
#
# We have a current input file; close it
#
close $currentfile;
#
# Unwind the current include stack
#
for ( my $i = @includestack - 1; $i >= 0; $i-- ) {
my $info = $includestack[$i];
close $info->[0];
}
#
# Now unwind the open stack; each element is an include stack
#
for ( my $i = @openstack - 1; $i >= 0; $i-- ) {
my $istack = $openstack[$i];
for ( my $j = ( @$istack - 1 ); $j >= 0; $j-- ) {
my $info = $istack->[$j][0];
close $info if $info;
}
}
}
#
# Unlink temporary files
#
unlink ( $tempfile ), $tempfile = undef if $tempfile;
unlink ( $perlscriptname ), $perlscriptname = undef if $perlscriptname;
unlink ( @tempfiles ), @tempfiles = () if @tempfiles;
#
# Delete temporary chains
#
cleanup_iptables if $sillyname;
}
#
# Issue fatal error message and die
#
sub fatal_error {
my $currentlineinfo = currentlineinfo;
handle_first_entry if $first_entry;
$| = 1; #Reset output buffering (flush any partially filled buffers).
if ( $log ) {
our @localtime = localtime;
printf $log '%s %2d %02d:%02d:%02d ', $abbr[$localtime[4]], @localtime[3,2,1,0];
if ( $confess ) {
print $log longmess( " ERROR: @_$currentlineinfo\n" );
} else {
print $log " ERROR: @_$currentlineinfo\n";
}
close $log;
$log = undef;
}
cleanup;
if ( $embedded ) {
confess "@_$currentlineinfo" if $confess;
die "@_$currentlineinfo\n";
} else {
confess " ERROR: @_$currentlineinfo" if $confess;
die " ERROR: @_$currentlineinfo\n";
}
}
sub fatal_error1 {
handle_first_entry if $first_entry;
$| = 1;
if ( $log ) {
our @localtime = localtime;
printf $log '%s %2d %02d:%02d:%02d ', $abbr[$localtime[4]], @localtime[3,2,1,0];
if ( $debug ) {
print $log longmess( " ERROR: @_\n" );
} else {
print $log " ERROR: @_\n";
}
close $log;
$log = undef;
}
cleanup;
confess " ERROR: @_" if $debug;
die " ERROR: @_\n";
}
#
# C/C++-like assertion checker -- the optional arguments are not used but will
# appear in the stack trace
#
sub assert( $;@ ) {
unless ( $_[0] ) {
my @caller0 = caller 0; # Where assert() was called
my @caller1 = caller 1; # Who called assert()
$confess = 1;
fatal_error "Internal error in $caller1[3] at $caller0[1] line $caller0[2]";
}
}
#
# Convert value to decimal number
#
sub numeric_value ( $ ) {
my $mark = lc $_[0];
my $negative = ( $mark =~ s/^-// );
return undef unless $mark =~ /^(0x[a-f0-9]+|0[0-7]*|[1-9]\d*)$/;
no warnings;
$mark = ( $mark =~ /^0/ ? oct $mark : $mark );
use warnings;
$negative ? - $mark : $mark;
}
sub numeric_value1 ( $ ) {
no warnings;
my $val = numeric_value $_[0];
fatal_error "Invalid Number ($_[0])" unless defined $val;
$val;
use warnings;
}
sub hex_value( $ ) {
my $val = lc $_[0];
return undef unless $val =~ /^[a-fA-F0-9]+$/;
no warnings;
oct '0x' . $val;
use warnings;
}
#
# Strip off superfluous leading zeros from a hex number
#
sub normalize_hex( $ ) {
my $val = lc shift;
$val =~ s/^0// while $val =~ /^0/ && length $val > 1;
$val;
}
#
# Return the argument expressed in Hex
#
sub in_hex( $ ) {
my $value = $_[0];
$value =~ /^0x/ ? $value : sprintf '0x%x', $_[0];
}
sub in_hex2( $ ) {
sprintf '0x%02x', $_[0];
}
sub in_hex3( $ ) {
sprintf '%03x', $_[0];
}
sub in_hex4( $ ) {
sprintf '0x%04x', $_[0];
}
sub in_hex8( $ ) {
sprintf '0x%08x', $_[0];
}
sub in_hexp( $ ) {
sprintf '%x', $_[0];
}
#
# Write the arguments to the script file (if any) with the current indentation.
#
# Replaces leading spaces with tabs as appropriate and suppresses consecutive blank lines.
#
sub emit {
assert( $script_enabled );
if ( $script || $debug ) {
#
# 'compile' as opposed to 'check'
#
for ( @_ ) {
unless ( /^\s*$/ ) {
my $line = $_; # This copy is necessary because the actual arguments are almost always read-only.
$line =~ s/^\n// if $lastlineblank;
$line =~ s/^/$indent/gm if $indent;
$line =~ s/ /\t/gm;
print $script "$line\n" if $script;
$lastlineblank = ( substr( $line, -1, 1 ) eq "\n" );
if ( $debug ) {
$line =~ s/^\n//;
$line =~ s/\n/\nGS-----> /g;
print "GS-----> $line\n";
}
} else {
unless ( $lastlineblank ) {
print $script "\n" if $script;
print "GS-----> \n" if $debug;
}
$lastlineblank = 1;
}
}
}
}
#
# Version of emit() that writes to standard out unconditionally
#
sub emitstd {
for ( @_ ) {
unless ( /^\s*$/ ) {
my $line = $_; # This copy is necessary because the actual arguments are almost always read-only.
$line =~ s/^\n// if $lastlineblank;
$line =~ s/^/$indent/gm if $indent;
$line =~ s/ /\t/gm;
print "$line\n";
$lastlineblank = ( substr( $line, -1, 1 ) eq "\n" );
} else {
print "\n" unless $lastlineblank;
$lastlineblank = 1;
}
}
}
#
# Write passed message to the script with newline but no indentation.
#
sub emit_unindented( $;$ ) {
assert( $script_enabled );
print $script $_[1] ? "$_[0]" : "$_[0]\n" if $script;
}
#
# Write a progress_message2 command with surrounding blank lines to the output file.
#
sub save_progress_message( $ ) {
emit "\nprogress_message2 @_\n" if $script;
}
#
# Write a progress_message command to the output file.
#
sub save_progress_message_short( $ ) {
emit "progress_message $_[0]" if $script;
}
#
# Set $timestamp
#
sub set_timestamp( $ ) {
$timestamp = shift;
}
#
# Set $verbosity
#
sub set_verbosity( $ ) {
$verbosity = shift;
}
#
# Set $log and $log_verbosity
#
sub set_log ( $$ ) {
my ( $l, $v ) = @_;
if ( defined $v ) {
my $value = numeric_value( $v );
fatal_error "Invalid Log Verbosity ( $v )" unless defined($value) && ( $value >= -1 ) && ( $value <= 2);
$log_verbosity = $value;
}
if ( $l && $log_verbosity >= 0 ) {
unless ( open $log , '>>' , $l ) {
$log = undef;
fatal_error "Unable to open STARTUP_LOG ($l) for writing: $!";
}
} else {
$log_verbosity = -1;
}
}
sub close_log() {
close $log, $log = undef if $log;
}
#
# Set $command, $doing and $done
#
sub set_command( $$$ ) {
($command, $doing, $done) = @_;
}
#
# Print the current TOD to STDOUT.
#
sub timestamp() {
our @localtime = localtime;
printf '%02d:%02d:%02d ', @localtime[2,1,0];
}
#
# Write a message if $verbosity >= 2.
#
sub progress_message {
my $havelocaltime = 0;
if ( $verbosity > 1 || $log_verbosity > 1 ) {
my $line = "@_";
my $leading = $line =~ /^(\s+)/ ? $1 : '';
$line =~ s/\s+/ /g;
if ( $verbosity > 1 ) {
timestamp, $havelocaltime = 1 if $timestamp;
#
# We use this function to display messages containing raw config file images which may contains tabs (including multiple tabs in succession).
# The following makes such messages look more readable and uniform
#
print "${leading}${line}\n";
}
if ( $log_verbosity > 1 ) {
our @localtime;
@localtime = localtime unless $havelocaltime;
printf $log '%s %2d %2d:%02d:%02d ', $abbr[$localtime[4]], @localtime[3,2,1,0];
print $log "${leading}${line}\n";
}
}
}
sub progress_message_nocompress {
my $havelocaltime = 0;
if ( $verbosity > 1 ) {
timestamp, $havelocaltime = 1 if $timestamp;
print "@_\n";
}
if ( $log_verbosity > 1 ) {
our @localtime;
@localtime = localtime unless $havelocaltime;
printf $log '%s %2d %2d:%02d:%02d ', $abbr[$localtime[4]], @localtime[3,2,1,0];
print $log "@_\n";
}
}
#
# Write a message if $verbosity >= 1
#
sub progress_message2 {
my $havelocaltime = 0;
if ( $verbosity > 0 ) {
timestamp, $havelocaltime = 1 if $timestamp;
print "@_\n";
}
if ( $log_verbosity > 0 ) {
our @localtime;
@localtime = localtime unless $havelocaltime;
printf $log '%s %2d %2d:%02d:%02d ', $abbr[$localtime[4]], @localtime[3,2,1,0];
print $log "@_\n";
}
}
#
# Write a message if $verbosity >= 0
#
sub progress_message3 {
my $havelocaltime = 0;
if ( $verbosity >= 0 ) {
timestamp, $havelocaltime = 1 if $timestamp;
print "@_\n";
}
if ( $log_verbosity >= 0 ) {
our @localtime;
@localtime = localtime unless $havelocaltime;
printf $log '%s %2d %2d:%02d:%02d ', $abbr[$localtime[4]], @localtime[3,2,1,0];
print $log "@_\n";
}
}
#
# Push/Pop Indent
#
sub push_indent(;$) {
my $times = shift || 1;
while ( $times-- ) {
if ( $indent2 ) {
$indent2 = '';
$indent = $indent1 = $indent1 . "\t";
} else {
$indent2 = ' ';
$indent = $indent1 . $indent2;
}
}
}
sub pop_indent(;$) {
my $times = shift || 1;
while ( $times-- ) {
if ( $indent2 ) {
$indent2 = '';
$indent = $indent1;
} else {
$indent1 = substr( $indent1 , 0, -1 );
$indent2 = ' ';
$indent = $indent1 . $indent2;
}
}
}
#
# Create the temporary script file -- the passed file name is the name of the final file.
# We create a temporary file in the same directory so that we can use rename to finalize it.
#
sub create_temp_script( $$ ) {
my ( $scriptfile, $export ) = @_;
my $suffix;
if ( $scriptfile eq '-' ) {
$verbosity = -1;
$script = undef;
open( $script, '>&STDOUT' ) or fatal_error "Open of STDOUT failed";
$file = '-';
return 1;
}
eval {
( $file, $dir, $suffix ) = fileparse( $scriptfile );
};
cleanup, die if $@;
fatal_error "$dir is a Symbolic Link" if -l $dir;
fatal_error "Directory $dir does not exist" unless -d _;
fatal_error "Directory $dir is not writable" unless -w _;
fatal_error "$scriptfile is a Symbolic Link" if -l $scriptfile;
fatal_error "$scriptfile is a Directory" if -d _;
fatal_error "$scriptfile exists and is not a compiled script" if -e _ && ! -x _;
fatal_error "An exported \u$globals{PRODUCT} compiled script may not be named '$globals{PRODUCT}'" if $export && "$file" eq $globals{PRODUCT} && $suffix eq '';
eval {
$dir = abs_path $dir unless $dir =~ m|^/|; # Work around http://rt.cpan.org/Public/Bug/Display.html?id=13851
( $script, $tempfile ) = tempfile ( 'tempfileXXXX' , DIR => $dir );
};
fatal_error "Unable to create temporary file in directory $dir" if $@;
$file = "$file.$suffix" if $suffix;
$dir .= '/' unless substr( $dir, -1, 1 ) eq '/';
$file = $dir . $file;
}
#
# Finalize the script file
#
sub finalize_script( $ ) {
my $export = $_[0];
close $script;
$script = 0;
if ( $file ne '-' ) {
rename $tempfile, $file or fatal_error "Cannot Rename $tempfile to $file: $!";
chmod 0700, $file or fatal_error "Cannot secure $file for execute access";
progress_message3 "Shorewall configuration compiled to $file" unless $export;
}
}
#
# Create the temporary aux config file.
#
sub create_temp_aux_config() {
eval {
( $script, $tempfile ) = tempfile ( 'tempfileXXXX' , DIR => $dir );
};
cleanup, die if $@;
}
#
# Finalize the aux config file.
#
sub finalize_aux_config() {
close $script;
$script = 0;
rename $tempfile, "$file.conf" or fatal_error "Cannot Rename $tempfile to $file.conf: $!";
progress_message3 "Shorewall configuration compiled to $file";
}
#
# Enable writes to the script file
#
sub enable_script() {
$script_enabled = 1;
}
#
# Disable writes to the script file
#
sub disable_script() {
$script_enabled = 0;
}
#
# Set $config{CONFIG_PATH}
#
sub set_config_path( $ ) {
$config{CONFIG_PATH} = shift;
}
#
# Set $debug
#
sub set_debug( $$ ) {
$debug = shift;
$confess = shift;
$confess ||= $debug;
}
#
# Search the CONFIG_PATH for the passed file
#
sub find_file($)
{
my ( $filename, $nosearch ) = @_;
return $filename if $filename =~ '/';
for my $directory ( @config_path ) {
my $file = "$directory$filename";
return $file if -f $file;
}
"$config_path[0]$filename";
}
sub split_list( $$;$ ) {
my ($list, $type, $origlist ) = @_;
fatal_error( "Invalid $type list (" . ( $origlist ? $origlist : $list ) . ')' ) if $list =~ /^,|,$|,,|!,|,!$/;
split /,/, $list;
}
sub split_list1( $$;$ ) {
my ($list, $type, $keepparens ) = @_;
fatal_error "Invalid $type list ($list)" if $list =~ /^,|,$|,,|!,|,!$/;
my @list1 = split /,/, $list;
my @list2;
my $element = '';
for ( @list1 ) {
my $count;
if ( ( $count = tr/(/(/ ) > 0 ) {
fatal_error "Invalid $type list ($list)" if $element || $count > 1;
s/\(// unless $keepparens;
if ( ( $count = tr/)/)/ ) > 0 ) {
fatal_error "Invalid $type list ($list)" if $count > 1;
s/\)// unless $keepparens;
push @list2 , $_;
} else {
$element = $_;
}
} elsif ( ( $count = tr/)/)/ ) > 0 ) {
fatal_error "Invalid $type list ($list)" unless $element && $count == 1;
s/\)// unless $keepparens;
push @list2, join ',', $element, $_;
$element = '';
} elsif ( $element ) {
$element = join ',', $element , $_;
} else {
push @list2 , $_;
}
}
@list2;
}
#
# The next two functions split a list which contain arbitrarily deep paren nesting.
# The first splits on ':' and the second on ','.
#
sub split_list2( $$ ) {
my ($list, $type ) = @_;
fatal_error "Invalid $type ($list)" if $list =~ /^:|::/;
my @list1 = split /:/, $list;
my @list2;
my $element = '';
my $opencount = 0;
for ( @list1 ) {
my $count;
if ( ( $count = tr/(/(/ ) > 0 ) {
$opencount += $count;
if ( $element eq '' ) {
$element = $_;
} else {
$element = join( ':', $element, $_ );
}
if ( ( $count = tr/)/)/ ) > 0 ) {
if ( ! ( $opencount -= $count ) ) {
push @list2 , $element;
$element = '';
} else {
fatal_error "Invalid $type ($list)" if $opencount < 0;
}
}
} elsif ( ( $count = tr/)/)/ ) > 0 ) {
fatal_error "Invalid $type ($list)" if $element eq '';
$element = join (':', $element, $_ );
if ( ! ( $opencount -= $count ) ) {
push @list2 , $element;
$element = '';
} else {
fatal_error "Invalid $type ($list)" if $opencount < 0;
}
} elsif ( $element eq '' ) {
push @list2 , $_;
} else {
$element = join ':', $element , $_;
}
}
unless ( $opencount == 0 ) {
fatal_error "Invalid $type ($list)";
}
@list2;
}
sub split_list3( $$ ) {
my ($list, $type ) = @_;
#
# We allow omitted arguments in action invocations.
#
$list =~ s/^,/-,/;
$list =~ s/,$/,-/;
$list =~ s/,,/,-,/g;
my @list1 = split /,/, $list;
my @list2;
my $element = '';
my $opencount = 0;
for ( @list1 ) {
my $count;
if ( ( $count = tr/(/(/ ) > 0 ) {
$opencount += $count;
if ( $element eq '' ) {
$element = $_;
} else {
$element = join( ',', $element, $_ );
}
if ( ( $count = tr/)/)/ ) > 0 ) {
if ( ! ( $opencount -= $count ) ) {
push @list2 , $element;
$element = '';
} else {
fatal_error "Invalid $type ($list)" if $opencount < 0;
}
}
} elsif ( ( $count = tr/)/)/ ) > 0 ) {
fatal_error "Invalid $type ($list)" if $element eq '';
$element = join (',', $element, $_ );
if ( ! ( $opencount -= $count ) ) {
push @list2 , $element;
$element = '';
} else {
fatal_error "Invalid $type ($list)" if $opencount < 0;
}
} elsif ( $element eq '' ) {
push @list2 , $_;
} else {
$element = join ',', $element , $_;
}
}
unless ( $opencount == 0 ) {
fatal_error "Invalid $type ($list)";
}
@list2;
}
#
# Determine if a value has been supplied
#
sub supplied( $ ) {
my $val = shift;
defined $val && $val ne '';
}
#
# Pre-process a line from a configuration file.
# ensure that it has an appropriate number of columns.
# supply '-' in omitted trailing columns.
# Handles all of the supported forms of column/pair specification
# Handles segragating raw iptables input in INLINE rules
#
sub split_line1( $$;$$ ) {
my ( $description, $columnsref, $nopad, $maxcolumns ) = @_;
unless ( defined $maxcolumns ) {
my @maxcolumns = ( keys %$columnsref );
$maxcolumns = @maxcolumns;
}
$inline_matches = '';
#
# First see if there is a semicolon on the line; what follows will be column/value pairs or raw iptables input
#
my ( $columns, $pairs, $rest ) = split( ';', $currentline );
if ( supplied $pairs ) {
#
# Found it -- be sure there wasn't more than one.
#
fatal_error "Only one semicolon (';') allowed on a line" if defined $rest;
if ( $currentline =~ /^\s*INLINE(?:\(.*\)|:.*)?\s/) {
$inline_matches = $pairs;
if ( $columns =~ /^(\s*|.*[^&@%]){(.*)}\s*$/ ) {
#
# Pairs are enclosed in curly brackets.
#
$columns = $1;
$pairs = $2;
} else {
$pairs = '';
}
}
} elsif ( $currentline =~ /^(\s*|.*[^&@%]){(.*)}$/ ) {
#
# Pairs are enclosed in curly brackets.
#
$columns = $1;
$pairs = $2;
} else {
$pairs = '';
}
fatal_error "Shorewall Configuration file entries may not contain double quotes, single back quotes or backslashes" if $columns =~ /["`\\]/;
fatal_error "Non-ASCII gunk in file" if $columns =~ /[^\s[:print:]]/;
my @line = split( ' ', $columns );
$nopad = {} unless $nopad;
my $first = supplied $line[0] ? $line[0] : '-';
my $npcolumns = $nopad->{$first};
if ( defined $npcolumns ) {
fatal_error "Invalid $first entry" if $npcolumns && @line != $npcolumns;
return @line
}
fatal_error "Shorewall Configuration file entries may not contain single quotes" if $currentline =~ /'/;
my $line = @line;
fatal_error "Invalid $description entry (too many columns)" if $line > $maxcolumns;
$line-- while $line > 0 && $line[$line-1] eq '-';
push @line, '-' while @line < $maxcolumns;
if ( supplied $pairs ) {
$pairs =~ s/^\s*//;
$pairs =~ s/\s*$//;
my @pairs = split( /,?\s+/, $pairs );
for ( @pairs ) {
fatal_error "Invalid column/value pair ($_)" unless /^(\w+)(?:=>?|:)(.+)$/;
my ( $column, $value ) = ( lc $1, $2 );
fatal_error "Unknown column ($1)" unless exists $columnsref->{$column};
$column = $columnsref->{$column};
fatal_error "Non-ASCII gunk in file" if $columns =~ /[^\s[:print:]]/;
$value = $1 if $value =~ /^"([^"]+)"$/;
fatal_error "Column values may not contain embedded double quotes, single back quotes or backslashes" if $columns =~ /["`\\]/;
fatal_error "Non-ASCII gunk in the value of the $column column" if $columns =~ /[^\s[:print:]]/;
$line[$column] = $value;
}
}
@line;
}
sub split_line($$) {
&split_line1( @_, {} );
}
#
# Generate a FORMAT warning
#
sub format_warning() {
warning_message "'FORMAT' is deprecated in favor of '?FORMAT' - consider running '$product update -D'" unless $warningcount2++;
}
#
# Process a COMMENT line (in $currentline)
#
sub have_capability( $;$ );
sub process_comment() {
if ( have_capability( 'COMMENTS' ) ) {
warning_message "'COMMENT' is deprecated in favor of '?COMMENT' - consider running '$product update -D'" unless $warningcount1++;
( $comment = $currentline ) =~ s/^\s*COMMENT\s*//;
$comment =~ s/\s*$//;
} else {
warning_message "COMMENTs ignored -- require comment support in iptables/Netfilter" unless $warningcount++;
}
}
#
# Returns True if there is a current COMMENT or if COMMENTS are not available.
#
sub no_comment() {
$comment ? 1 : ! have_capability( 'COMMENTS' );
}
#
# Clear the $comment variable and the comment stack
#
sub clear_comment() {
$comment = '';
$nocomment = 0;
}
#
# Set the current comment
#
sub set_comment( $ ) {
( $comment ) = @_;
}
#
# Push and Pop comment stack
#
sub push_comment() {
my $return = $comment;
$comment = '';
$return;
}
sub pop_comment( $ ) {
$comment = $_[0];
}
#
# Set $comment to the passed unless there is a current comment
#
sub macro_comment( $ ) {
my $macro = $_[0];
$comment = $macro unless $comment || ! ( have_capability( 'COMMENTS' ) && $config{AUTOCOMMENT} );
}
#
# Open a file, setting $currentfile. Returns the file's absolute pathname if the file
# exists, is non-empty and was successfully opened. Terminates with a fatal error
# if the file exists, is non-empty, but the open fails.
#
sub do_open_file( $ ) {
my $fname = $_[0];
open $currentfile, '<', $fname or fatal_error "Unable to open $fname: $!";
$currentlinenumber = 0;
$ifstack = @ifstack;
$currentfilename = $fname;
}
#
# Arguments are:
#
# - file name
# - Maximum value allowed in ?FORMAT directives
# - ?COMMENT allowed in this file
# - Ignore ?COMMENT in ths file
#
sub open_file( $;$$$ ) {
my ( $fname, $mf, $ca, $nc ) = @_;
$fname = find_file $fname;
assert( ! defined $currentfile );
if ( -f $fname && -s _ ) {
$first_entry = 0;
$file_format = 1;
$max_format = supplied $mf ? $mf : 1;
$comments_allowed = supplied $ca ? $ca : 0;
$nocomment = $nc;
do_open_file $fname;;
} else {
$ifstack = @ifstack;
'';
}
}
#
# Push open-specific globals onto the include stack
#
sub push_include() {
push @includestack, [ $currentfile,
$currentfilename,
$currentlinenumber,
$ifstack,
$file_format,
$max_format,
$comment,
$nocomment ];
}
#
# Pop the include stack
#
sub pop_include() {
my $arrayref = pop @includestack;
unless ( $ifstack == @ifstack ) {
my $lastref = $ifstack[-1];
$currentlinenumber = 'EOF';
fatal_error qq(Missing "?ENDIF" to match ?IF at line number $lastref->[2])
}
if ( $arrayref ) {
( $currentfile,
$currentfilename,
$currentlinenumber,
$ifstack,
$file_format,
$max_format,
$comment,
$nocomment ) = @$arrayref;
} else {
$currentfile = undef;
$currentlinenumber = 'EOF';
clear_comment;
}
}
#
# This function is normally called below in read_a_line() when EOF is reached. Clients of the
# module may also call the function to close the file before EOF
#
sub close_file() {
if ( $currentfile ) {
my $result = close $currentfile;
pop_include;
fatal_error "SHELL Script failed" unless $result;
$first_entry = 0;
}
}
#
# Clear the current filename
#
sub clear_currentfilename() {
$currentfilename = '';
}
#
# Process an ?IF, ?ELSIF, ?ELSE or ?END directive
#
#
# Report an error or warning from process_compiler_directive()
#
sub directive_error( $$$ ) {
$currentfilename = $_[1];
$currentlinenumber = $_[2];
fatal_error $_[0];
}
sub directive_warning( $$$ ) {
my ( $savefilename, $savelineno ) = ( $currentfilename, $currentlinenumber );
( my $warning, $currentfilename, $currentlinenumber ) = @_;
warning_message $warning;
( $currentfilename, $currentlinenumber ) = ( $savefilename, $savelineno );
}
#
# Add quotes to the passed value if the passed 'first part' has an odd number of quotes
# Return an expression that concatenates $first, $val and $rest
#
sub join_parts( $$$ ) {
my ( $first, $val, $rest ) = @_;
$val = '' unless defined $val;
$val = "'$val'" unless ( $val =~ /^-?\d+$/ || # Value is numeric
( ( ( $first =~ tr/"/"/ ) & 1 ) || # There are an odd number of double quotes preceding the value
( ( $first =~ tr/'/'/ ) & 1 ) ) ); # There are an odd number of single quotes preceding the value
join( '', $first, $val, $rest );
}
#
# Evaluate an expression in an ?IF, ?ELSIF or ?SET directive
#
sub evaluate_expression( $$$ ) {
my ( $expression , $filename , $linenumber ) = @_;
my $val;
my $count = 0;
my $chain = $actparms{chain};
# $1 $2 $3 - $4
while ( $expression =~ m( ^(.*?) \$({)? (\d+|[a-zA-Z_]\w*) (?(2)}) (.*)$ )x ) {
my ( $first, $var, $rest ) = ( $1, $3, $4);
if ( $var =~ /^\d+$/ ) {
fatal_error "Action parameters (\$$var) may only be referenced within the body of an action" unless $chain;
$val = $var ? $actparms{$var} : $actparms{0}->{name};
} else {
$val = ( exists $variables{$var} ? $variables{$var} :
exists $capdesc{$var} ? have_capability( $var ) : '' );
}
$expression = join_parts( $first, $val, $rest );
directive_error( "Variable Expansion Loop" , $filename, $linenumber ) if ++$count > 100;
}
if ( $chain ) {
# $1 $2 $3 - $4
while ( $expression =~ m( ^(.*?) \@({)? (\d+|[a-zA-Z]\w*) (?(2)}) (.*)$ )x ) {
my ( $first, $var, $rest ) = ( $1, $3, $4);
$var = numeric_value( $var ) if $var =~ /^\d/;
$val = $var ? $actparms{$var} : $chain;
$parmsmodified ||= $var eq 'caller';
$expression = join_parts( $first, $val, $rest );
directive_error( "Variable Expansion Loop" , $filename, $linenumber ) if ++$count > 100;
}
}
# $1 $2 $3 - $4
while ( $expression =~ m( ^(.*?) __({)? (\w+) (?(2)}) (.*)$ )x ) {
my ( $first, $cap, $rest ) = ( $1, $3, $4);
if ( exists $capdesc{$cap} ) {
$val = have_capability( $cap );
if ( defined $val ) {
$val = "'$val'" unless $val =~ /^-?\d+$/;
} else {
$val = 0;
}
} elsif ( $cap =~ /^IPV([46])$/ ) {
$val = ( $family == $1 ) || 0;
} else {
directive_error "Unknown capability ($cap)", $filename, $linenumber;
}
$expression = join( '', $first, $val, $rest );
}
$expression =~ s/^\s*(.+)\s*$/$1/;
print "EXPR=> $expression\n" if $debug;
if ( $expression =~ /^\d+$/ ) {
$val = $expression
} else {
#
# Not a simple one-term expression -- compile it
#
$val = eval qq(package Shorewall::User;\nuse strict;\n# line $linenumber "$filename"\n$expression);
unless ( $val ) {
directive_error( "Couldn't parse expression ($expression): $@" , $filename, $linenumber ) if $@;
$val = '' unless defined $val;
}
}
$val;
}
#
# Each entry in @ifstack consists of a 4-tupple
#
# [0] = The keyword (IF,ELSIF or ELSE)
# [1] = True if we were already omitting at the last IF directive
# [2] = True if we have included any block of the current IF...ELSEIF....ELSEIF... sequence.
# [3] = The line number of the directive
#
sub process_compiler_directive( $$$$ ) {
my ( $omitting, $line, $filename, $linenumber ) = @_;
print "CD===> $line\n" if $debug;
directive_error( "Invalid compiler directive ($line)" , $filename, $linenumber ) unless $line =~ /^\s*\?(IF\s+|ELSE|ELSIF\s+|ENDIF|SET\s+|RESET\s+|FORMAT\s+|COMMENT\s*)(.*)$/i;
my ($keyword, $expression) = ( uc $1, $2 );
$keyword =~ s/\s*$//;
if ( supplied $expression ) {
$expression =~ s/#.*//;
$expression =~ s/\s*$//;
} else {
$expression = '';
}
my ( $lastkeyword, $prioromit, $included, $lastlinenumber ) = @ifstack ? @{$ifstack[-1]} : ('', 0, 0, 0 );
my %directives = ( IF => sub() {
directive_error( "Missing IF expression" , $filename, $linenumber ) unless supplied $expression;
my $nextomitting = $omitting || ! evaluate_expression( $expression , $filename, $linenumber );
push @ifstack, [ 'IF', $omitting, ! $nextomitting, $linenumber ];
$omitting = $nextomitting;
} ,
ELSIF => sub() {
directive_error( "?ELSIF has no matching ?IF" , $filename, $linenumber ) unless @ifstack > $ifstack && $lastkeyword =~ /IF/;
directive_error( "Missing IF expression" , $filename, $linenumber ) unless $expression;
if ( $omitting && ! $included ) {
#
# We can only change to including if we were previously omitting
#
$omitting = $prioromit || ! evaluate_expression( $expression , $filename, $linenumber );
$included = ! $omitting;
} else {
#
# We have already included -- so we don't want to include this part
#
$omitting = 1;
}
$ifstack[-1] = [ 'ELSIF', $prioromit, $included, $lastlinenumber ];
} ,
ELSE => sub() {
directive_error( "Invalid ?ELSE" , $filename, $linenumber ) unless $expression eq '';
directive_error( "?ELSE has no matching ?IF" , $filename, $linenumber ) unless @ifstack > $ifstack && $lastkeyword =~ /IF/;
$omitting = $included || ! $omitting unless $prioromit;
$ifstack[-1] = [ 'ELSE', $prioromit, 1, $lastlinenumber ];
} ,
ENDIF => sub() {
directive_error( "Invalid ?ENDIF" , $filename, $linenumber ) unless $expression eq '';
directive_error( q(Unexpected "?ENDIF" without matching ?IF or ?ELSE) , $filename, $linenumber ) if @ifstack <= $ifstack;
$omitting = $prioromit;
pop @ifstack;
} ,
SET => sub() {
unless ( $omitting ) {
directive_error( "Missing SET variable", $filename, $linenumber ) unless supplied $expression;
( my $var , $expression ) = split ' ', $expression, 2;
directive_error( "Invalid SET variable ($var)", $filename, $linenumber) unless $var =~ /^(\$)?([a-zA-Z]\w*)$/ || $var =~ /^(@)(\d+|[a-zA-Z]\w*)/;
directive_error( "Missing SET expression" , $filename, $linenumber) unless supplied $expression;
if ( ( $1 || '' ) eq '@' ) {
$var = $2;
$var = numeric_value( $var ) if $var =~ /^\d/;
$var = $2 || 'chain';
directive_error( "Shorewall variables may only be SET in the body of an action", $filename, $linenumber ) unless $actparms{0};
my $val = $actparms{$var} = evaluate_expression ( $expression,
$filename,
$linenumber );
$parmsmodified = 1;
} else {
$variables{$2} = evaluate_expression( $expression,
$filename,
$linenumber );
}
}
} ,
FORMAT => sub() {
unless ( $omitting ) {
directive_error( "?FORMAT is not allowed in this file", $filename, $linenumber ) unless $max_format > 1;
directive_error( "Missing format", $filename, $linenumber ) unless supplied $expression;
directive_error( "Invalid format ($expression)", $filename, $linenumber ) unless $expression =~ /^\d+$/;
directive_error( "Format must be between 1 and $max_format", $filename, $linenumber ) unless $expression && $expression <= $max_format;
$file_format = $expression;
}
} ,
RESET => sub() {
unless ( $omitting ) {
my $var = $expression;
directive_error( "Missing RESET variable", $filename, $linenumber) unless supplied $var;
directive_error( "Invalid RESET variable ($var)", $filename, $linenumber) unless $var =~ /^(\$)?([a-zA-Z]\w*)$/ || $var =~ /^(@)(\d+|[a-zA-Z]\w*)/;
if ( ( $1 || '' ) eq '@' ) {
$var = numeric_value( $var ) if $var =~ /^\d/;
$var = $2 || 'chain';
directive_error( "Shorewall variables may only be RESET in the body of an action", $filename, $linenumber ) unless $actparms{0};
if ( exists $actparms{$var} ) {
if ( $var =~ /^loglevel|logtag|chain|disposition|caller$/ ) {
$actparms{$var} = '';
} else {
delete $actparms{$var}
}
} else {
directive_warning( "Shorewall variable $2 does not exist", $filename, $linenumber );
}
} else {
if ( exists $variables{$2} ) {
delete $variables{$2};
} else {
directive_warning( "Shell variable $2 does not exist", $filename, $linenumber );
}
}
}
} ,
COMMENT => sub() {
unless ( $omitting ) {
if ( $comments_allowed ) {
unless ( $nocomment ) {
if ( have_capability( 'COMMENTS' ) ) {
( $comment = $line ) =~ s/^\s*\?COMMENT\s*//;
$comment =~ s/\s*$//;
} else {
directive_warning( "COMMENTs ignored -- require comment support in iptables/Netfilter" , $filename, $linenumber ) unless $warningcount++;
}
}
} else {
directive_error ( "?COMMENT is not allowed in this file", $filename, $linenumber );
}
}
}
);
if ( my $function = $directives{$keyword} ) {
$function->();
} else {
assert( 0, $keyword );
}
$omitting;
}
#
# Functions for copying a file into the script
#
sub copy( $ ) {
assert( $script_enabled );
if ( $script ) {
my $file = $_[0];
my $omitting = 0;
my $save_ifstack = $ifstack;
my $lineno = 0;
$ifstack = @ifstack;
open IF , $file or fatal_error "Unable to open $file: $!";
while ( <IF> ) {
chomp;
$lineno++;
if ( /^\s*\?/ ) {
$omitting = process_compiler_directive( $omitting, $_, $file, $lineno );
next;
}
next if $omitting;
if ( /^\s*$/ ) {
print $script "\n" unless $lastlineblank;
$lastlineblank = 1;
} else {
if ( $indent ) {
s/^(\s*)/$indent1$1$indent2/;
s/ /\t/ if $indent2;
}
print $script $_;
print $script "\n";
$lastlineblank = 0;
}
}
if ( $ifstack < @ifstack ) {
$currentlinenumber = 'EOF';
$currentfilename = $file;
fatal_error "Missing ?ENDIF to match the ?IF at line $ifstack[-1]->[3]";
} else {
$ifstack = $save_ifstack;
}
close IF;
}
}
#
# This variant of copy handles line continuation, 'here documents' and INCLUDE
#
sub copy1( $ ) {
assert( $script_enabled );
my $result = 0;
if ( $script || $debug ) {
my ( $do_indent, $here_documents ) = ( 1, '');
open_file( $_[0] );
while ( $currentfile ) {
while ( <$currentfile> ) {
$currentlinenumber++;
chomp;
if ( /^\s*\?/ ) {
$omitting = process_compiler_directive( $omitting, $_, $currentfilename, $currentlinenumber );
next;
}
if ( /^${here_documents}\s*$/ ) {
if ( $script ) {
print $script $here_documents if $here_documents;
print $script "\n";
}
if ( $debug ) {
print "GS-----> $here_documents" if $here_documents;
print "GS----->\n";
}
$do_indent = 1;
$here_documents = '';
next;
}
if ( $do_indent && /.*<<\s*([^ ]+)s*(.*)/ ) {
$here_documents = $1;
s/^(\s*)/$indent1$1$indent2/;
s/ /\t/ if $indent2;
$do_indent = 0;
if ( $script ) {
print $script $_;
print $script "\n";
}
if ( $debug ) {
s/\n/\nGS-----> /g;
print "GS-----> $_\n";
}
$result = 1;
next;
}
if ( $do_indent ) {
if ( /^\s*INCLUDE\b/ ) {
my @line = split / /;
fatal_error "Invalid INCLUDE command" if @line != 2;
fatal_error "INCLUDEs nested too deeply" if @includestack >= 4;
my $filename = find_file $line[1];
warning_message "Reserved filename ($1) in INCLUDE directive" if $filename =~ '/(.*)' && $config_files{$1};
fatal_error "INCLUDE file $filename not found" unless -f $filename;
fatal_error "Directory ($filename) not allowed in INCLUDE" if -d _;
if ( -s _ ) {
push_include;
$currentfile = undef;
do_open_file $filename;
} else {
$currentlinenumber = 0;
}
next;
}
if ( $indent ) {
s/^(\s*)/$indent1$1$indent2/;
s/ /\t/ if $indent2;
}
}
if ( $script ) {
print $script $_;
print $script "\n";
}
$do_indent = ! ( $here_documents || /\\$/ );
$result = 1 unless $result || /^\s*$/ || /^\s*#/;
if ( $debug ) {
s/\n/\nGS-----> /g;
print "GS-----> $_\n";
}
}
close_file;
}
}
$lastlineblank = 0;
$result;
}
#
# This one drops header comments and replaces them with a three-line banner
#
sub copy2( $$ ) {
my ( $file, $trace ) = @_;
assert( $script_enabled );
my $empty = 1;
if ( $script || $trace ) {
my $file = $_[0];
my $omitting = 0;
my $save_ifstack = $ifstack;
my $lineno = 0;
open IF , $file or fatal_error "Unable to open $file: $!";
while ( <IF> ) {
$lineno++;
$empty = 0, last unless /^#/;
}
unless ( $empty ) {
emit <<EOF;
################################################################################
# Functions imported from $file
################################################################################
EOF
chomp;
emit( $_ ) unless /^\s*$/;
while ( <IF> ) {
$lineno++;
chomp;
if ( /^\s*\?/ ) {
$omitting = process_compiler_directive( $omitting, $_, $file, $lineno );
next;
}
next if $omitting;
if ( /^\s*$/ ) {
unless ( $lastlineblank ) {
print $script "\n" if $script;
print "GS----->\n" if $trace;
}
$lastlineblank = 1;
} else {
if ( $indent ) {
s/^(\s*)/$indent1$1$indent2/;
s/ /\t/ if $indent2;
}
if ( $script ) {
print $script $_;
print $script "\n";
}
if ( $trace ) {
s/\n/GS-----> \n/g;
print "GS-----> $_\n";
}
$lastlineblank = 0;
}
}
unless ( $lastlineblank ) {
print $script "\n" if $script;
print "GS----->\n" if $trace;
}
emit( '################################################################################',
"# End of imports from $file",
'################################################################################' );
}
if ( $ifstack < @ifstack ) {
$currentfilename = $file;
$currentlinenumber = 'EOF';
fatal_error "Missing ?ENDIF to match the ?IF at line $ifstack[-1]->[3]";
} else {
$ifstack = $save_ifstack;
}
close IF;
}
}
#
# The following two functions allow module clients to nest opens. This happens frequently
# in the Rules module.
#
sub push_open( $;$$$ ) {
my ( $file, $max , $ca, $nc ) = @_;
push_include;
my @a = @includestack;
push @openstack, \@a;
@includestack = ();
$currentfile = undef;
open_file( $file , $max, $comments_allowed || $ca, $nc );
}
sub pop_open() {
@includestack = @{pop @openstack};
pop_include;
}
#
# This function is called by in-line PERL to generate a line of input for the current file.
# If the in-line PERL returns an indication of success, then the generated lines will be
# processed as regular file input.
#
sub shorewall {
unless ( $perlscript ) {
fatal_error "shorewall() may not be called in this context" unless $currentfile;
$dir ||= '/tmp/';
eval {
( $perlscript, $perlscriptname ) = tempfile ( 'perlscriptXXXX' , DIR => $dir );
};
fatal_error "Unable to create temporary file in directory $dir" if $@;
}
print $perlscript "@_\n";
}
#
# We don't announce that we are checking/compiling a file until we determine that the file contains
# at least one non-blank, non-commentary line.
#
# The argument to this function may be either a scalar or a function reference. When the first
# non-blank/non-commentary line is reached:
#
# - if a function reference was passed to first_entry(), that function is called
# - otherwise, the argument to first_entry() is passed to progress_message2().
#
# We do this processing in read_a_line() rather than in the higher-level routines because
# Embedded Shell/Perl scripts are processed out of read_a_line(). If we were to defer announcement
# until we get back to the caller of read_a_line(), we could issue error messages about parsing and
# running scripts in the file before we'd even indicated that we are processing it.
#
sub first_entry( $ ) {
$first_entry = shift;
my $reftype = reftype $first_entry;
assert( $reftype eq 'CODE' ) if $reftype;
}
sub read_a_line($);
sub embedded_shell( $ ) {
my $multiline = shift;
fatal_error "INCLUDEs nested too deeply" if @includestack >= 4;
my ( $command, $linenumber ) = ( "/bin/sh -c '$currentline", $currentlinenumber );
if ( $multiline ) {
#
# Multi-line script
#
fatal_error "Invalid BEGIN SHELL directive" unless $currentline =~ /^\s*$/;
$command .= "\n";
my $last = 0;
while ( read_a_line( PLAIN_READ ) ) {
last if $last = $currentline =~ s/^\s*\??END(\s+SHELL)?\s*(?:;\s*)?$//i;
$command .= "$currentline\n";
}
fatal_error ( "Missing END SHELL" ) unless $last;
fatal_error ( "Invalid END SHELL directive" ) unless $currentline =~ /^\s*$/;
}
$command .= q(');
push_include;
$currentfile = undef;
open $currentfile , '-|', $command or fatal_error qq(Shell Command failed);
$currentfilename = "SHELL\@$currentfilename:$currentlinenumber";
$currentline = '';
$currentlinenumber = 0;
$ifstack = @ifstack;
}
sub embedded_perl( $ ) {
my $multiline = shift;
my ( $command , $linenumber ) = ( qq(package Shorewall::User;\nno strict;\nuse Shorewall::Config (qw/shorewall/);\n# line $currentlinenumber "$currentfilename"\n$currentline), $currentlinenumber );
if ( $multiline ) {
#
# Multi-line script
#
fatal_error "Invalid BEGIN PERL directive" unless $currentline =~ /^\s*$/;
$command .= "\n";
my $last = 0;
while ( read_a_line( PLAIN_READ ) ) {
last if $last = $currentline =~ s/^\s*\??END(\s+PERL)?\s*(?:;\s*)?//i;
$command .= "$currentline\n";
}
fatal_error ( "Missing END PERL" ) unless $last;
fatal_error ( "Invalid END PERL directive" ) unless $currentline =~ /^\s*$/;
} else {
$currentline = '';
}
$embedded++;
unless (my $return = eval $command ) {
#
# Perl found the script offensive or the script itself died
#
if ( $@ ) {
$@ =~ s/, <\$currentfile> line \d+//g;
fatal_error1 "$@";
}
unless ( defined $return ) {
fatal_error "Perl Script failed: $!" if $!;
fatal_error "Perl Script failed";
}
fatal_error "Perl Script Returned False";
}
$embedded--;
if ( $perlscript ) {
fatal_error "INCLUDEs nested too deeply" if @includestack >= 4;
assert( close $perlscript );
$perlscript = undef;
push_include;
$currentfile = undef;
open $currentfile, '<', $perlscriptname or fatal_error "Unable to open Perl Script $perlscriptname";
push @tempfiles, $perlscriptname unless unlink $perlscriptname; #unlink fails on Cygwin
$perlscriptname = '';
$currentfilename = "PERL\@$currentfilename:$linenumber";
$currentline = '';
$currentlinenumber = 0;
$ifstack = @ifstack;
}
}
#
# Return inline matches
#
sub get_inline_matches() {
"$inline_matches ";
}
sub set_inline_matches( $ ) {
$inline_matches = $_[0];
}
#
# Push/pop acton params
#
sub push_action_params( $$$$$$ ) {
my ( $action, $chainref, $parms, $loglevel, $logtag, $caller ) = @_;
my @parms = ( undef , split_list3( $parms , 'parameter' ) );
$actparms{modified} = $parmsmodified;
my %oldparms = %actparms;
$parmsmodified = 0;
%actparms = ();
for ( my $i = 1; $i < @parms; $i++ ) {
my $val = $parms[$i];
$actparms{$i} = $val eq '-' ? '' : $val eq '--' ? '-' : $val;
}
$actparms{0} = $chainref;
$actparms{action} = $action;
$actparms{loglevel} = $loglevel;
$actparms{logtag} = $logtag;
$actparms{caller} = $caller;
$actparms{disposition} = '' if $chainref->{action};
#
# The Shorewall variable '@chain' has the non-word charaters removed
#
( $actparms{chain} = $chainref->{name} ) =~ s/[^\w]//g;
\%oldparms;
}
#
# Pop the action parameters using the passed hash reference
# Return true of the popped parameters were modified
#
sub pop_action_params( $ ) {
my $oldparms = shift;
%actparms = %$oldparms;
my $return = $parmsmodified;
( $parmsmodified ) = delete $actparms{modified};
$return;
}
sub default_action_params {
my $action = shift;
my ( $val, $i );
for ( $i = 1; 1; $i++ ) {
last unless defined ( $val = shift );
my $curval = $actparms{$i};
$actparms{$i} = $val unless supplied( $curval );
}
fatal_error "Too Many arguments to action $action" if defined $actparms{$i};
}
sub get_action_params( $ ) {
my $num = shift;
fatal_error "Invalid argument to get_action_params()" unless $num =~ /^\d+$/ && $num > 0;
my @return;
for ( my $i = 1; $i <= $num; $i++ ) {
my $val = $actparms{$i};
push @return, defined $val ? $val eq '-' ? '' : $val eq '--' ? '-' : $val : $val;
}
@return;
}
#
# Returns the Level and Tag for the current action chain
#
sub get_action_logging() {
@actparms{ 'loglevel', 'logtag' };
}
sub get_action_chain() {
$actparms{0};
}
sub get_action_chain_name() {
$actparms{chain};
}
sub set_action_name_to_caller() {
$actparms{chain} = $actparms{caller};
}
sub get_action_disposition() {
$actparms{disposition};
}
sub set_action_disposition($) {
$actparms{disposition} = $_[0];
}
sub set_action_param( $$ ) {
my $i = shift;
fatal_error "Parameter numbers must be numeric" unless $i =~ /^\d+$/ && $i > 0;
$actparms{$i} = shift;
}
#
# Expand Shell Variables in the passed buffer using %actparms, %params, %shorewallrc1 and %config,
#
sub expand_variables( \$ ) {
my ( $lineref, $count ) = ( $_[0], 0 );
my $chain = $actparms{chain};
# $1 $2 $3 - $4
while ( $$lineref =~ m( ^(.*?) \$({)? (\d+|[a-zA-Z_]\w*) (?(2)}) (.*)$ )x ) {
my ( $first, $var, $rest ) = ( $1, $3, $4);
my $val;
if ( $var =~ /^\d+$/ ) {
fatal_error "Action parameters (\$$var) may only be referenced within the body of an action" unless $chain;
if ( $config{IGNOREUNKNOWNVARIABLES} ) {
fatal_error "Invalid action parameter (\$$var)" if ( length( $var ) > 1 && $var =~ /^0/ );
} else {
fatal_error "Undefined parameter (\$$var)" unless ( defined $actparms{$var} &&
( length( $var ) == 1 ||
$var !~ /^0/ ) );
}
$val = $var ? $actparms{$var} : $actparms{0}->{name};
} elsif ( exists $variables{$var} ) {
$val = $variables{$var};
} elsif ( exists $actparms{$var} ) {
$val = $actparms{$var};
} else {
fatal_error "Undefined shell variable (\$$var)" unless $config{IGNOREUNKNOWNVARIABLES} || exists $config{$var};
}
$val = '' unless defined $val;
$$lineref = join( '', $first , $val , $rest );
fatal_error "Variable Expansion Loop" if ++$count > 100;
}
if ( $actparms{0} ) {
# $1 $2 $3 - $4
while ( $$lineref =~ m( ^(.*?) \@({)? (\d+|[a-zA-Z_]\w*) (?(2)}) (.*)$ )x ) {
my ( $first, $var, $rest ) = ( $1, $3, $4);
my $val = $var ? $actparms{$var} : $actparms{chain};
$val = '' unless defined $val;
$$lineref = join( '', $first , $val , $rest );
fatal_error "Variable Expansion Loop" if ++$count > 100;
}
}
}
sub expand_shorewallrc_variables( \$ ) {
my ( $lineref, $count ) = ( $_[0], 0 );
# $1 $2 $3 - $4
while ( $$lineref =~ m( ^(.*?) \$({)? (\d+|[a-zA-Z]\w*) (?(2)}) (.*)$ )x ) {
my ( $first, $var, $rest ) = ( $1, $3, $4);
my $val;
if ( exists $shorewallrc{$var} ) {
$val = $shorewallrc{$var}
}
$val = '' unless defined $val;
$$lineref = join( '', $first , $val , $rest );
fatal_error "Variable Expansion Loop" if ++$count > 100;
}
}
#
# Handle first-entry processing
#
sub handle_first_entry() {
#
# $first_entry can contain either a function reference or a message. If it
# contains a reference, call the function -- otherwise issue the message
#
my $entry = $first_entry;
$first_entry = 0;
reftype( $entry ) ? $entry->() : progress_message2( $entry );
}
#
# Read a line from the current include stack. Based on the passed options, it will conditionally:
#
# - Ignore blank or comment-only lines.
# - Remove trailing comments.
# - Handle Line Continuation
# - Handle embedded SHELL and PERL scripts
# - Expand shell variables from %params and %ENV.
# - Handle INCLUDE <filename>
# - Handle ?IF, ?ELSE, ?ENDIF
#
sub read_a_line($) {
my $options = $_[0];
while ( $currentfile ) {
$currentline = '';
$currentlinenumber = 0;
while ( <$currentfile> ) {
chomp;
#
# Handle conditionals
#
if ( /^\s*\?(?:IF|ELSE|ELSIF|ENDIF|SET|RESET|FORMAT|COMMENT)/i ) {
$omitting = process_compiler_directive( $omitting, $_, $currentfilename, $. );
next;
}
if ( $omitting ) {
print "OMIT=> $_\n" if $debug;
next;
}
$currentlinenumber = $. unless $currentlinenumber;
#
# Suppress leading whitespace in certain continuation lines
#
s/^\s*// if $currentline =~ /[,:]$/ && $options & CONFIG_CONTINUATION;
#
# If this is a continued line with a trailing comment, remove comment. Note that
# the result will now end in '\'.
#
s/\s*#.*$// if ($options & STRIP_COMMENTS) && /[\\]\s*#.*$/;
#
# Continuation
#
chop $currentline, next if ($currentline .= $_) =~ /\\$/;
#
# Must check for shell/perl before doing variable expansion
#
if ( $options & EMBEDDED_ENABLED ) {
if ( $currentline =~ s/^\s*\??(BEGIN\s+)SHELL\s*;?//i || $currentline =~ s/^\s*\??SHELL\s*//i ) {
handle_first_entry if $first_entry;
embedded_shell( $1 );
next;
}
if ( $currentline =~ s/^\s*\??(BEGIN\s+)PERL\s*;?//i || $currentline =~ s/^\s*\??PERL\s*//i ) {
handle_first_entry if $first_entry;
embedded_perl( $1 );
next;
}
}
#
# Now remove concatinated comments if asked
#
$currentline =~ s/\s*#.*$// if $options & STRIP_COMMENTS;
if ( $options & SUPPRESS_WHITESPACE ) {
#
# Ignore (concatinated) blank lines
#
$currentline = '', $currentlinenumber = 0, next if $currentline =~ /^\s*$/;
#
# Eliminate trailing whitespace
#
$currentline =~ s/\s*$//;
}
if ( $comments_allowed && $currentline =~ /^\s*COMMENT\b/ ) {
process_comment unless $nocomment;
$currentline = '';
$currentlinenumber = 0;
next
}
if ( $max_format > 1 && $currentline =~ /^\s*FORMAT\s+(.+)/ ) {
format_warning;
my $format = $1;
fatal_error( "Invalid format ($format)" ) unless $format =~ /\d+/;
fatal_error( "Format must be between 1 and $max_format" ) unless $format && $format <= $max_format;
$file_format = $format;
$currentline = '';
$currentlinenumber = 0;
next
}
#
# Line not blank -- Handle any first-entry message/capabilities check
#
handle_first_entry if $first_entry;
#
# Expand Shell Variables using %params and %actparms
#
expand_variables( $currentline ) if $options & EXPAND_VARIABLES;
if ( ( $options & DO_INCLUDE ) && $currentline =~ /^\s*\??INCLUDE\s/ ) {
my @line = split ' ', $currentline;
fatal_error "Invalid INCLUDE command" if @line != 2;
fatal_error "INCLUDEs/Scripts nested too deeply" if @includestack >= 4;
my $filename = find_file $line[1];
fatal_error "INCLUDE file $filename not found" unless -f $filename;
fatal_error "Directory ($filename) not allowed in INCLUDE" if -d _;
if ( -s _ ) {
push_include;
$currentfile = undef;
do_open_file $filename;
} else {
$currentlinenumber = 0;
}
$currentline = '';
} else {
fatal_error "Non-ASCII gunk in file" if ( $options && CHECK_GUNK ) && $currentline =~ /[^\s[:print:]]/;
print "IN===> $currentline\n" if $debug;
return 1;
}
}
close_file;
}
}
sub process_shorewallrc( $$ ) {
my ( $shorewallrc , $product ) = @_;
$shorewallrc{PRODUCT} = $product;
if ( open_file $shorewallrc ) {
while ( read_a_line( STRIP_COMMENTS | SUPPRESS_WHITESPACE | CHECK_GUNK ) ) {
if ( $currentline =~ /^([a-zA-Z]\w*)=(.*)$/ ) {
my ($var, $val) = ($1, $2);
$val = $1 if $val =~ /^\"([^\"]*)\"$/;
expand_shorewallrc_variables($val) if supplied $val;
$shorewallrc{$var} = $val;
} else {
fatal_error "Unrecognized shorewallrc entry";
}
}
} else {
fatal_error "Failed to open $shorewallrc: $!";
}
if ( supplied $shorewallrc{VARDIR} ) {
if ( ! supplied $shorewallrc{VARLIB} ) {
$shorewallrc{VARLIB} = $shorewallrc{VARDIR};
$shorewallrc{VARDIR} = "$shorewallrc{VARLIB}/$product";
}
} elsif ( supplied $shorewallrc{VARLIB} ) {
$shorewallrc{VARDIR} = "$shorewallrc{VARLIB}/$product" unless supplied $shorewallrc{VARDIR};
}
}
#
# Provide the passed default value for the passed configuration variable
#
sub default ( $$ ) {
my ( $var, $val ) = @_;
$config{$var} = $val unless supplied( $config{$var} );
}
#
# Provide a default value for a yes/no configuration variable.
#
sub default_yes_no ( $$ ) {
my ( $var, $val ) = @_;
my $curval = $config{$var};
if ( supplied $curval ) {
$curval = lc $curval;
if ( $curval eq 'no' ) {
$config{$var} = '';
} else {
fatal_error "Invalid value for $var ($curval)" unless $curval eq 'yes';
}
} else {
$config{$var} = $val;
}
}
sub default_yes_no_ipv4 ( $$ ) {
my ( $var, $val ) = @_;
default_yes_no( $var, $val );
warning_message "$var=Yes is ignored for IPv6" if $family == F_IPV6 && $config{$var};
}
sub numeric_option( $$$ ) {
my ( $option, $default, $min ) = @_;
my $value = $config{$option};
my $val = $default;
if ( supplied $value ) {
$val = numeric_value $value;
fatal_error "Invalid value ($value) for '$option'" unless defined $val && $val <= 32;
}
$val = $min if $val < $min;
$config{$option} = $val;
}
sub make_mask( $ ) {
0xffffffff >> ( 32 - $_[0] );
}
my @suffixes = qw(group range threshold nlgroup cprange qthreshold);
#
# Validate a log level -- Drop the trailing '!' and translate to numeric value if appropriate"
#
sub level_error( $;$ ) {
my ( $level , $option ) = @_;
if ( $option ) {
fatal_error "Invalid log level ($level) for option $option";
} else {
fatal_error "Invalid log level ($_[0])";
}
}
my %logoptions = ( tcp_sequence => '--log-tcp-sequence',
ip_options => '--log-ip-options',
tcp_options => '--log-tcp-options',
uid => '--log-uid',
macdecode => '--log-macdecode',
#
# Because a level can pass through validate_level() more than once,
# the full option names are also included here.
#
'--log-tcp-sequence' => '--log-tcp-sequence',
'--log-ip-options' => '--log-ip-options',
'--log-tcp-options' => '--log-tcp-options',
'--log-uid' => '--log-uid',
'--log-macdecode' => '--log-macdecode',
);
sub validate_level( $;$ ) {
my ( $rawlevel, $option ) = @_;
my $level = uc $rawlevel;
if ( supplied ( $level ) ) {
$level =~ s/!$//;
my $value = $level;
my $qualifier;
unless ( $value =~ /^[0-7]$/ ) {
} if ( $value =~ /^([0-7])(.*)$/ ) {
$value = $1;
$qualifier = $2;
} elsif ( $value =~ /^([A-Za-z0-7]+)(.*)$/ ) {
level_error( $level, $option ) unless defined( $value = $validlevels{$1} );
$qualifier = $2;
}
if ( $value =~ /^[0-7]$/ ) {
#
# Syslog Level
#
if ( supplied $qualifier ) {
my $options = '';
my %options;
level_error ( $rawlevel , $option ) unless $qualifier =~ /^\((.*)\)$/;
for ( split_list lc $1, "log options" ) {
my $option = $logoptions{$_};
fatal_error "Unknown LOG option ($_)" unless $option;
unless ( $options{$option} ) {
if ( $options ) {
$options = join( ',', $options, $option );
} else {
$options = $option;
}
$options{$option} = 1;
}
}
$value .= "($options)" if $options;
}
if ( $option ) {
require_capability ( 'LOG_TARGET' , "Log level $level for option $option", 's' );
} else {
require_capability ( 'LOG_TARGET' , "Log level $level", 's' );
}
return $value;
}
return '' unless $value;
if ( $option ) {
require_capability( "${value}_TARGET", "Log level $level for option $option", 's' );
} else {
require_capability( "${value}_TARGET", "Log level $level", 's' );
}
if ( $value =~ /^(NFLOG|ULOG)$/ ) {
my $olevel = $value;
if ( $qualifier =~ /^[(](.*)[)]$/ ) {
my @options = split /,/, $1;
my $prefix = lc $olevel;
my $index = $prefix eq 'ulog' ? 3 : 0;
level_error( $rawlevel , $option ) if @options > 3;
for ( @options ) {
if ( supplied( $_ ) ) {
level_error( $rawlevel , $option ) unless /^\d+/;
$olevel .= " --${prefix}-$suffixes[$index] $_";
}
$index++;
}
} elsif ( $qualifier =~ /^ --/ ) {
return $rawlevel;
} else {
level_error( $rawlevel , $option ) if $qualifier;
}
return $olevel;
}
#
# Must be LOGMARK
#
my $sublevel;
if ( supplied $qualifier ) {
return $rawlevel if $qualifier =~ /^ --/;
if ( $qualifier =~ /[(](.+)[)]$/ ) {
$sublevel = $1;
$sublevel = $validlevels{$sublevel} unless $sublevel =~ /^[0-7]$/;
level_error( $rawlevel , $option ) unless defined $sublevel && $sublevel =~ /^[0-7]$/;
} else {
level_error( $rawlevel , $option );
}
} else {
$sublevel = 6; # info
}
return "LOGMARK --log-level $sublevel";
}
'';
}
#
# Validate a log level and supply default
#
sub default_log_level( $$ ) {
my ( $level, $default ) = @_;
my $value = $config{$level};
unless ( supplied $value ) {
$config{$level} = validate_level $default, $level;
} else {
$config{$level} = validate_level $value, $level;
}
}
#
# Check a tri-valued variable
#
sub check_trivalue( $$ ) {
my ( $var, $default) = @_;
my $val = $config{$var};
if ( defined $val ) {
$val = lc $val;
if ( $val eq 'yes' || $val eq 'on' ) {
$config{$var} = 'on';
} elsif ( $val eq 'no' || $val eq 'off' ) {
$config{$var} = 'off';
} elsif ( $val eq 'keep' ) {
$config{$var} = '';
} elsif ( $val eq '' ) {
$config{$var} = $default
} else {
fatal_error "Invalid value ($val) for $var";
}
} else {
$config{$var} = $default
}
}
#
# Produce a report of the detected capabilities
#
sub report_capability( $ ) {
my $cap = $_[0];
print " $capdesc{$cap}: ";
if ( $cap eq 'CAPVERSION' || $cap eq 'KERNELVERSION') {
my $version = $capabilities{$cap};
printf "%d.%d.%d\n", int( $version / 10000 ) , int ( ( $version % 10000 ) / 100 ) , int ( $version % 100 );
} else {
print $capabilities{$cap} ? "Available\n" : "Not Available\n";
}
}
sub report_capabilities() {
if ( $verbosity > 1 ) {
print "Shorewall has detected the following capabilities:\n";
for my $cap ( sort { $capdesc{$a} cmp $capdesc{$b} } keys %capabilities ) {
report_capability $cap;
}
}
}
#
# Search the current PATH for the passed executable
#
sub which( $ ) {
my $prog = $_[0];
for ( split /:/, $config{PATH} ) {
return "$_/$prog" if -x "$_/$prog";
}
'';
}
#
# Load the kernel modules defined in the 'modules' file.
#
sub load_kernel_modules( ) {
my $moduleloader = which( 'modprobe' ) || ( which 'insmod' );
my $modulesdir = $config{MODULESDIR};
unless ( $modulesdir ) {
my $uname = `uname -r`;
fatal_error "The command 'uname -r' failed" unless $? == 0;
chomp $uname;
$modulesdir = "/lib/modules/$uname/kernel/net/ipv4/netfilter:/lib/modules/$uname/kernel/net/ipv6/netfilter:/lib/modules/$uname/kernel/net/netfilter:/lib/modules/$uname/extra:/lib/modules/$uname/extra/ipset";
}
my @moduledirectories;
for ( split /:/, $modulesdir ) {
push @moduledirectories, $_ if -d $_;
}
if ( $moduleloader && @moduledirectories && open_file( $config{LOAD_HELPERS_ONLY} ? 'helpers' : 'modules' ) ) {
my %loadedmodules;
$loadedmodules{$_}++ for split_list( $config{DONT_LOAD}, 'module' );
progress_message2 "Loading Modules...";
open LSMOD , '-|', 'lsmod' or fatal_error "Can't run lsmod";
while ( <LSMOD> ) {
my $module = ( split( /\s+/, $_, 2 ) )[0];
$loadedmodules{$module}++ unless $module eq 'Module'
}
close LSMOD;
$config{MODULE_SUFFIX} = 'o gz ko o.gz ko.gz' unless $config{MODULE_SUFFIX};
my @suffixes = split /\s+/ , $config{MODULE_SUFFIX};
while ( read_a_line( NORMAL_READ ) ) {
fatal_error "Invalid modules file entry" unless ( $currentline =~ /^loadmodule\s+([a-zA-Z]\w*)\s*(.*)$/ );
my ( $module, $arguments ) = ( $1, $2 );
unless ( $loadedmodules{ $module } ) {
for my $directory ( @moduledirectories ) {
for my $suffix ( @suffixes ) {
my $modulefile = "$directory/$module.$suffix";
if ( -f $modulefile ) {
if ( $moduleloader eq 'insmod' ) {
system ("insmod $modulefile $arguments" );
} else {
system( "modprobe $module $arguments" );
}
$loadedmodules{ $module } = 1;
}
}
}
}
}
}
}
#
# Get the current kernel version
#
sub determine_kernelversion() {
my $kernelversion=`uname -r`;
if ( $kernelversion =~ /^(\d+)\.(\d+).(\d+)/ ) {
$capabilities{KERNELVERSION} = sprintf "%d%02d%02d", $1 , $2 , $3;
} elsif ( $kernelversion =~ /^(\d+)\.(\d+)/ ) {
$capabilities{KERNELVERSION} = sprintf "%d%02d00", $1 , $2;
} else {
fatal_error "Unrecognized Kernel Version Format ($kernelversion)";
}
}
#
# Capability Reporting and detection.
#
sub Nat_Enabled() {
qt1( "$iptables $iptablesw -t nat -L -n" );
}
sub Persistent_Snat() {
have_capability( 'NAT_ENABLED' ) || return '';
my $result = '';
my $address = $family == F_IPV4 ? '1.2.3.4' : '2001::1';
if ( qt1( "$iptables $iptablesw -t nat -N $sillyname" ) ) {
$result = qt1( "$iptables $iptablesw -t nat -A $sillyname -j SNAT --to-source $address --persistent" );
qt1( "$iptables $iptablesw -t nat -F $sillyname" );
qt1( "$iptables $iptablesw -t nat -X $sillyname" );
}
$result;
}
sub Masquerade_Tgt() {
have_capability( 'NAT_ENABLED' ) || return '';
my $result = '';
my $address = $family == F_IPV4 ? '1.2.3.4' : '2001::1';
if ( qt1( "$iptables $iptablesw -t nat -N $sillyname" ) ) {
$result = qt1( "$iptables $iptablesw -t nat -A $sillyname -j MASQUERADE" );
qt1( "$iptables $iptablesw -t nat -F $sillyname" );
qt1( "$iptables $iptablesw -t nat -X $sillyname" );
}
$result;
}
sub Udpliteredirect() {
have_capability( 'NAT_ENABLED' ) || return '';
my $result = '';
my $address = $family == F_IPV4 ? '1.2.3.4' : '2001::1';
if ( qt1( "$iptables $iptablesw -t nat -N $sillyname" ) ) {
$result = qt1( "$iptables $iptablesw -t nat -A $sillyname -p udplite -m multiport --dports 33 -j REDIRECT --to-port 22" );
qt1( "$iptables $iptablesw -t nat -F $sillyname" );
qt1( "$iptables $iptablesw -t nat -X $sillyname" );
}
$result;
}
sub Mangle_Enabled() {
if ( qt1( "$iptables $iptablesw -t mangle -L -n" ) ) {
system( "$iptables -t mangle -N $sillyname" ) == 0 || fatal_error "Cannot Create Mangle chain $sillyname";
}
}
sub Conntrack_Match() {
if ( $family == F_IPV4 ) {
qt1( "$iptables $iptablesw -A $sillyname -m conntrack --ctorigdst 192.168.1.1 -j ACCEPT" );
} else {
qt1( "$iptables $iptablesw -A $sillyname -m conntrack --ctorigdst ::1 -j ACCEPT" );
}
}
sub New_Conntrack_Match() {
have_capability( 'CONNTRACK_MATCH' ) && qt1( "$iptables $iptablesw -A $sillyname -m conntrack -p tcp --ctorigdstport 22 -j ACCEPT" );
}
sub Old_Conntrack_Match() {
! qt1( "$iptables $iptablesw -A $sillyname -m conntrack ! --ctorigdst 1.2.3.4" );
}
sub Multiport() {
qt1( "$iptables $iptablesw -A $sillyname -p tcp -m multiport --dports 21,22 -j ACCEPT" );
}
sub Kludgefree1() {
have_capability( 'MULTIPORT' ) && qt1( "$iptables $iptablesw -A $sillyname -p tcp -m multiport --sports 60 -m multiport --dports 99 -j ACCEPT" );
}
sub Kludgefree2() {
have_capability( 'PHYSDEV_MATCH' ) && qt1( "$iptables $iptablesw -A $sillyname -m physdev --physdev-in eth0 -m physdev --physdev-out eth0 -j ACCEPT" );
}
sub Kludgefree3() {
if ( $family == F_IPV4 ) {
qt1( "$iptables $iptablesw -A $sillyname -m iprange --src-range 192.168.1.5-192.168.1.124 -m iprange --dst-range 192.168.1.5-192.168.1.124 -j ACCEPT" );
} else {
qt1( "$iptables $iptablesw -A $sillyname -m iprange --src-range ::1-::2 -m iprange --dst-range 192.168.1.5-192.168.1.124 -j ACCEPT" );
}
}
sub Kludgefree() {
Kludgefree1 || Kludgefree2 || Kludgefree3;
}
sub Xmultiport() {
qt1( "$iptables $iptablesw -A $sillyname -p tcp -m multiport --dports 21:22 -j ACCEPT" );
}
sub Emultiport() {
qt1( "$iptables $iptablesw -A $sillyname -p sctp -m multiport --dports 21,22 -j ACCEPT" );
}
sub Policy_Match() {
qt1( "$iptables $iptablesw -A $sillyname -m policy --pol ipsec --mode tunnel --dir in -j ACCEPT" );
}
sub Physdev_Match() {
qt1( "$iptables $iptablesw -A $sillyname -m physdev --physdev-in eth0 -j ACCEPT" );
}
sub Physdev_Bridge() {
qt1( "$iptables $iptablesw -A $sillyname -m physdev --physdev-is-bridged --physdev-in eth0 --physdev-out eth1 -j ACCEPT" );
}
sub IPRange_Match() {
if ( $family == F_IPV4 ) {
qt1( "$iptables $iptablesw -A $sillyname -m iprange --src-range 192.168.1.5-192.168.1.124 -j ACCEPT" );
} else {
qt1( "$iptables $iptablesw -A $sillyname -m iprange --src-range ::1-::2 -j ACCEPT" );
}
}
sub Recent_Match() {
qt1( "$iptables $iptablesw -A $sillyname -m recent --update -j ACCEPT" );
}
sub Owner_Match() {
qt1( "$iptables $iptablesw -A $sillyname -m owner --uid-owner 0 -j ACCEPT" );
}
sub Owner_Name_Match() {
if ( my $name = `id -un 2> /dev/null` ) {
chomp $name;
qt1( "$iptables $iptablesw -A $sillyname -m owner --uid-owner $name -j ACCEPT" );
}
}
sub Connmark_Match() {
qt1( "$iptables $iptablesw -A $sillyname -m connmark --mark 2 -j ACCEPT" );
}
sub Xconnmark_Match() {
have_capability( 'CONNMARK_MATCH' ) && qt1( "$iptables $iptablesw -A $sillyname -m connmark --mark 2/0xFF -j ACCEPT" );
}
sub Ipp2p_Match() {
qt1( "$iptables $iptablesw -A $sillyname -p tcp -m ipp2p --edk -j ACCEPT" );
}
sub Old_Ipp2p_Match() {
qt1( "$iptables $iptablesw -A $sillyname -p tcp -m ipp2p --ipp2p -j ACCEPT" ) if $capabilities{IPP2P_MATCH};
}
sub Length_Match() {
qt1( "$iptables $iptablesw -A $sillyname -m length --length 10:20 -j ACCEPT" );
}
sub Enhanced_Reject() {
if ( $family == F_IPV6 ) {
qt1( "$iptables $iptablesw -A $sillyname -j REJECT --reject-with icmp6-adm-prohibited" );
} else {
qt1( "$iptables $iptablesw -A $sillyname -j REJECT --reject-with icmp-host-prohibited" );
}
}
sub Comments() {
qt1( qq($iptables -A $sillyname -j ACCEPT -m comment --comment "This is a comment" ) );
}
sub Hashlimit_Match() {
if ( qt1( "$iptables $iptablesw -A $sillyname -m hashlimit --hashlimit-upto 3/min --hashlimit-burst 3 --hashlimit-name $sillyname --hashlimit-mode srcip -j ACCEPT" ) ) {
! ( $capabilities{OLD_HL_MATCH} = 0 );
} else {
have_capability 'OLD_HL_MATCH';
}
}
sub Old_Hashlimit_Match() {
qt1( "$iptables $iptablesw -A $sillyname -m hashlimit --hashlimit 3/min --hashlimit-burst 3 --hashlimit-name $sillyname --hashlimit-mode srcip -j ACCEPT" );
}
sub Mark() {
have_capability( 'MANGLE_ENABLED' ) && qt1( "$iptables $iptablesw -t mangle -A $sillyname -j MARK --set-mark 1" );
}
sub Xmark() {
have_capability( 'MARK' ) && qt1( "$iptables $iptablesw -t mangle -A $sillyname -j MARK --and-mark 0xFF" );
}
sub Exmark() {
have_capability( 'MARK' ) && qt1( "$iptables $iptablesw -t mangle -A $sillyname -j MARK --set-mark 1/0xFF" );
}
sub Connmark() {
have_capability( 'MANGLE_ENABLED' ) && qt1( "$iptables $iptablesw -t mangle -A $sillyname -j CONNMARK --save-mark" );
}
sub Xconnmark() {
have_capability( 'XCONNMARK_MATCH' ) && have_capability( 'XMARK' ) && qt1( "$iptables $iptablesw -t mangle -A $sillyname -j CONNMARK --save-mark --mask 0xFF" );
}
sub New_Tos_Match() {
qt1( "$iptables $iptablesw -t mangle -A $sillyname -m tos --tos 0x10/0xff" );
}
sub Classify_Target() {
have_capability( 'MANGLE_ENABLED' ) && qt1( "$iptables $iptablesw -t mangle -A $sillyname -j CLASSIFY --set-class 1:1" );
}
sub IPMark_Target() {
have_capability( 'MANGLE_ENABLED' ) && qt1( "$iptables $iptablesw -t mangle -A $sillyname -j IPMARK --addr src" );
}
sub Tproxy_Target() {
have_capability( 'MANGLE_ENABLED' ) && qt1( "$iptables $iptablesw -t mangle -A $sillyname -p tcp -j TPROXY --on-port 0 --tproxy-mark 1" );
}
sub Mangle_Forward() {
have_capability( 'MANGLE_ENABLED' ) && qt1( "$iptables $iptablesw -t mangle -L FORWARD -n" );
}
sub Raw_Table() {
qt1( "$iptables $iptablesw -t raw -L -n" );
}
sub Rawpost_Table() {
qt1( "$iptables $iptablesw -t rawpost -L -n" );
}
sub Old_IPSet_Match() {
my $ipset = $config{IPSET} || 'ipset';
my $result = 0;
$ipset = which $ipset unless $ipset =~ '/';
if ( $ipset && -x $ipset ) {
qt( "$ipset -X $sillyname" );
if ( qt( "$ipset -N $sillyname iphash" ) ) {
if ( qt1( "$iptables $iptablesw -A $sillyname -m set --set $sillyname src -j ACCEPT" ) ) {
qt1( "$iptables $iptablesw -F $sillyname" );
$result = $capabilities{IPSET_MATCH} = 1;
}
qt( "$ipset -X $sillyname" );
}
}
$result;
}
sub IPSet_Match() {
my $ipset = $config{IPSET} || 'ipset';
my $result = 0;
my $fam = $family == F_IPV4 ? 'inet' : 'inet6';
$ipset = which $ipset unless $ipset =~ '/';
if ( $ipset && -x $ipset ) {
qt( "$ipset -X $sillyname" );
if ( qt( "$ipset -N $sillyname iphash" ) || qt( "$ipset -N $sillyname hash:ip family $fam") ) {
if ( qt1( "$iptables $iptablesw -A $sillyname -m set --match-set $sillyname src -j ACCEPT" ) ) {
qt1( "$iptables $iptablesw -F $sillyname" );
$result = ! ( $capabilities{OLD_IPSET_MATCH} = 0 );
} else {
$result = have_capability 'OLD_IPSET_MATCH';
}
qt( "$ipset -X $sillyname" );
}
}
$result;
}
sub IPSET_V5() {
my $ipset = $config{IPSET} || 'ipset';
my $result = 0;
$ipset = which $ipset unless $ipset =~ '/';
if ( $ipset && -x $ipset ) {
qt( "$ipset -X $sillyname" );
if ( qt( "$ipset -N $sillyname hash:ip family inet" ) ) {
$result = 1;
qt( "$ipset -X $sillyname" );
}
}
$result;
}
sub Usepkttype() {
qt1( "$iptables $iptablesw -A $sillyname -m pkttype --pkt-type broadcast -j ACCEPT" );
}
sub Addrtype() {
qt1( "$iptables $iptablesw -A $sillyname -m addrtype --src-type BROADCAST -j ACCEPT" );
}
sub Tcpmss_Match() {
qt1( "$iptables $iptablesw -A $sillyname -p tcp --tcp-flags SYN,RST SYN -m tcpmss --mss 1000:1500 -j ACCEPT" );
}
sub Nfqueue_Target() {
qt1( "$iptables $iptablesw -A $sillyname -j NFQUEUE --queue-num 4" );
}
sub Realm_Match() {
qt1( "$iptables $iptablesw -A $sillyname -m realm --realm 1" );
}
sub Helper_Match() {
qt1( "$iptables $iptablesw -A $sillyname -p tcp --dport 21 -m helper --helper ftp" );
}
sub have_helper( $$$ ) {
my ( $helper, $proto, $port ) = @_;
if ( $helpers_enabled{$helper} ) {
if ( have_capability 'CT_TARGET' ) {
qt1( "$iptables $iptablesw -t raw -A $sillyname -p $proto --dport $port -j CT --helper $helper" );
} else {
have_capability 'HELPER_MATCH';
}
}
}
sub Amanda_Helper() {
have_helper( 'amanda', 'udp', 10080 );
}
sub FTP0_Helper() {
have_helper( 'ftp-0', 'tcp', 21 ) and $helpers_aliases{ftp} = 'ftp-0';
}
sub FTP_Helper() {
have_helper( 'ftp', 'tcp', 21 ) || have_capability 'FTP0_HELPER';
}
sub H323_Helpers() {
have_helper( 'RAS', 'udp', 1719 );
}
sub IRC0_Helper() {
have_helper( 'irc-0', 'tcp', 6667 ) and $helpers_aliases{irc} = 'irc-0';
}
sub IRC_Helper() {
have_helper( 'irc', 'tcp', 6667 ) || IRC0_Helper;
}
sub Netbios_ns_Helper() {
have_helper( 'netbios-ns', 'udp', 137 );
}
sub PPTP_Helper() {
have_helper( 'pptp', 'tcp', 1729 );
}
sub SANE0_Helper() {
have_helper( 'sane-0', 'tcp', 6566 ) and $helpers_aliases{sane} = 'sane-0';
}
sub SANE_Helper() {
have_helper( 'sane', 'tcp', 6566 ) || have_capability 'SANE0_HELPER';
}
sub SIP0_Helper() {
have_helper( 'sip-0', 'udp', 5060 ) and $helpers_aliases{sip} = 'sip-0';
}
sub SIP_Helper() {
have_helper( 'sip', 'udp', 5060 ) || have_capability 'SIP0_HELPER';
}
sub SNMP_Helper() {
have_helper( 'snmp', 'udp', 161 );
}
sub TFTP0_Helper() {
have_helper( 'tftp-0', 'udp', 69 ) and $helpers_aliases{tftp} = 'tftp-0';
}
sub TFTP_Helper() {
have_helper( 'tftp', 'udp', 69 ) || have_capability 'TFTP0_HELPER';
}
sub Connlimit_Match() {
qt1( "$iptables $iptablesw -A $sillyname -m connlimit --connlimit-above 8" );
}
sub Time_Match() {
qt1( "$iptables $iptablesw -A $sillyname -m time --timestart 11:00" );
}
sub Goto_Target() {
qt1( "$iptables $iptablesw -A $sillyname -g $sillyname1" );
}
sub Log_Target() {
qt1( "$iptables $iptablesw -A $sillyname -j LOG" );
}
sub Ulog_Target() {
qt1( "$iptables $iptablesw -A $sillyname -j ULOG" );
}
sub NFLog_Target() {
qt1( "$iptables $iptablesw -A $sillyname -j NFLOG" );
}
sub Logmark_Target() {
qt1( "$iptables $iptablesw -A $sillyname -j LOGMARK" );
}
sub Flow_Filter() {
$tc && system( "$tc filter add flow help 2>&1 | grep -q ^Usage" ) == 0;
}
sub Basic_Filter() {
$tc && system( "$tc filter add basic help 2>&1 | grep -q ^Usage" ) == 0;
}
sub Fwmark_Rt_Mask() {
$ip && system( "$ip rule add help 2>&1 | grep -q /MASK" ) == 0;
}
sub Mark_Anywhere() {
qt1( "$iptables $iptablesw -A $sillyname -j MARK --set-mark 5" );
}
sub Header_Match() {
qt1( "$iptables $iptablesw -A $sillyname -m ipv6header --header 255 -j ACCEPT" );
}
sub Account_Target() {
if ( $family == F_IPV4 ) {
qt1( "$iptables $iptablesw -A $sillyname -j ACCOUNT --addr 192.168.1.0/29 --tname $sillyname" );
} else {
qt1( "$iptables $iptablesw -A $sillyname -j ACCOUNT --addr 1::/122 --tname $sillyname" );
}
}
sub Condition_Match() {
qt1( "$iptables $iptablesw -A $sillyname -m condition --condition foo" );
}
sub Audit_Target() {
qt1( "$iptables $iptablesw -A $sillyname -j AUDIT --type drop" );
}
sub Iptables_S() {
qt1( "$iptables $iptablesw -S INPUT" )
}
sub Ct_Target() {
my $ct_target;
if ( have_capability 'RAW_TABLE' ) {
qt1( "$iptables $iptablesw -t raw -N $sillyname" );
$ct_target = qt1( "$iptables $iptablesw -t raw -A $sillyname -j CT --notrack" );
}
$ct_target;
}
sub Statistic_Match() {
qt1( "$iptables $iptablesw -A $sillyname -m statistic --mode nth --every 2 --packet 1" );
}
sub Imq_Target() {
have_capability( 'MANGLE_ENABLED' ) && qt1( "$iptables $iptablesw -t mangle -A $sillyname -j IMQ --todev 0" );
}
sub Dscp_Match() {
have_capability( 'MANGLE_ENABLED' ) && qt1( "$iptables $iptablesw -t mangle -A $sillyname -m dscp --dscp 0" );
}
sub Dscp_Target() {
have_capability( 'MANGLE_ENABLED' ) && qt1( "$iptables $iptablesw -t mangle -A $sillyname -j DSCP --set-dscp 0" );
}
sub RPFilter_Match() {
have_capability( 'MANGLE_ENABLED' ) && qt1( "$iptables $iptablesw -t mangle -A $sillyname -m rpfilter" );
}
sub NFAcct_Match() {
my $result;
if ( qt1( "nfacct add $sillyname" ) ) {
$result = qt1( "$iptables $iptablesw -A $sillyname -m nfacct --nfacct-name $sillyname" );
qt( "$iptables -D $sillyname -m nfacct --nfacct-name $sillyname" );
qt( "nfacct del $sillyname" );
}
$result;
}
sub GeoIP_Match() {
qt1( "$iptables $iptablesw -A $sillyname -m geoip --src-cc US" );
}
sub Checksum_Target() {
have_capability( 'MANGLE_ENABLED' ) && qt1( "$iptables $iptablesw -t mangle -A $sillyname -j CHECKSUM --checksum-fill" );
}
sub Arptables_JF() {
my $arptables = $config{ARPTABLES};
$arptables = which( 'arptables' ) unless supplied $arptables;
if ( $arptables && -f $arptables && -x _ ) {
$config{ARPTABLES} = $arptables;
qt( "$arptables -L OUT" );
}
}
our %detect_capability =
( ACCOUNT_TARGET =>\&Account_Target,
AMANDA_HELPER => \&Amanda_Helper,
ARPTABLESJF => \&Arptables_JF,
AUDIT_TARGET => \&Audit_Target,
ADDRTYPE => \&Addrtype,
BASIC_FILTER => \&Basic_Filter,
CHECKSUM_TARGET => \&Checksum_Target,
CLASSIFY_TARGET => \&Classify_Target,
CONDITION_MATCH => \&Condition_Match,
COMMENTS => \&Comments,
CONNLIMIT_MATCH => \&Connlimit_Match,
CONNMARK => \&Connmark,
CONNMARK_MATCH => \&Connmark_Match,
CONNTRACK_MATCH => \&Conntrack_Match,
CT_TARGET => \&Ct_Target,
DSCP_MATCH => \&Dscp_Match,
DSCP_TARGET => \&Dscp_Target,
ENHANCED_REJECT => \&Enhanced_Reject,
EMULTIPORT => \&Emultiport,
EXMARK => \&Exmark,
FLOW_FILTER => \&Flow_Filter,
FTP_HELPER => \&FTP_Helper,
FTP0_HELPER => \&FTP0_Helper,
FWMARK_RT_MASK => \&Fwmark_Rt_Mask,
GEOIP_MATCH => \&GeoIP_Match,
GOTO_TARGET => \&Goto_Target,
H323_HELPER => \&H323_Helpers,
HASHLIMIT_MATCH => \&Hashlimit_Match,
HEADER_MATCH => \&Header_Match,
HELPER_MATCH => \&Helper_Match,
IMQ_TARGET => \&Imq_Target,
IPMARK_TARGET => \&IPMark_Target,
IPP2P_MATCH => \&Ipp2p_Match,
IPRANGE_MATCH => \&IPRange_Match,
IPSET_MATCH => \&IPSet_Match,
IRC_HELPER => \&IRC_Helper,
IRC0_HELPER => \&IRC0_Helper,
OLD_IPSET_MATCH => \&Old_IPSet_Match,
IPSET_V5 => \&IPSET_V5,
IPTABLES_S => \&Iptables_S,
KLUDGEFREE => \&Kludgefree,
LENGTH_MATCH => \&Length_Match,
LOGMARK_TARGET => \&Logmark_Target,
LOG_TARGET => \&Log_Target,
ULOG_TARGET => \&Ulog_Target,
NFLOG_TARGET => \&NFLog_Target,
MANGLE_ENABLED => \&Mangle_Enabled,
MANGLE_FORWARD => \&Mangle_Forward,
MARK => \&Mark,
MARK_ANYWHERE => \&Mark_Anywhere,
MASQUERADE_TGT => \&Masquerade_Tgt,
MULTIPORT => \&Multiport,
NAT_ENABLED => \&Nat_Enabled,
NETBIOS_NS_HELPER => \&Netbios_ns_Helper,
NEW_CONNTRACK_MATCH => \&New_Conntrack_Match,
NFACCT_MATCH => \&NFAcct_Match,
NFQUEUE_TARGET => \&Nfqueue_Target,
OLD_CONNTRACK_MATCH => \&Old_Conntrack_Match,
OLD_HL_MATCH => \&Old_Hashlimit_Match,
OLD_IPP2P_MATCH => \&Old_Ipp2p_Match,
NEW_TOS_MATCH => \&New_Tos_Match,
OWNER_MATCH => \&Owner_Match,
OWNER_NAME_MATCH => \&Owner_Name_Match,
PERSISTENT_SNAT => \&Persistent_Snat,
PHYSDEV_BRIDGE => \&Physdev_Bridge,
PHYSDEV_MATCH => \&Physdev_Match,
POLICY_MATCH => \&Policy_Match,
PPTP_HELPER => \&PPTP_Helper,
RAW_TABLE => \&Raw_Table,
RAWPOST_TABLE => \&Rawpost_Table,
REALM_MATCH => \&Realm_Match,
RECENT_MATCH => \&Recent_Match,
RPFILTER_MATCH => \&RPFilter_Match,
SANE_HELPER => \&SANE_Helper,
SANE0_HELPER => \&SANE0_Helper,
SIP_HELPER => \&SIP_Helper,
SIP0_HELPER => \&SIP0_Helper,
SNMP_HELPER => \&SNMP_Helper,
STATISTIC_MATCH => \&Statistic_Match,
TCPMSS_MATCH => \&Tcpmss_Match,
TFTP_HELPER => \&TFTP_Helper,
TFTP0_HELPER => \&TFTP0_Helper,
TIME_MATCH => \&Time_Match,
TPROXY_TARGET => \&Tproxy_Target,
UDPLITEREDIRECT => \&Udpliteredirect,
USEPKTTYPE => \&Usepkttype,
XCONNMARK_MATCH => \&Xconnmark_Match,
XCONNMARK => \&Xconnmark,
XMARK => \&Xmark,
XMULTIPORT => \&Xmultiport,
);
sub detect_capability( $ ) {
my $capability = shift;
my $function = $detect_capability{ $capability };
assert( ( reftype( $function ) || '' ) eq 'CODE' );
$function->();
}
#
# Report the passed capability
#
sub have_capability( $;$ ) {
my ( $capability, $required ) = @_;
our %detect_capability;
my $setting = $capabilities{ $capability };
$setting = $capabilities{ $capability } = detect_capability( $capability ) unless defined $setting;
$used{$capability} = $required ? 2 : 1 if $setting;
$setting;
}
#
# Determine which optional facilities are supported by iptables/netfilter
#
sub determine_capabilities() {
my $pid = $$;
$capabilities{CAPVERSION} = $globals{CAPVERSION};
determine_kernelversion;
$sillyname = "fooX$pid";
$sillyname1 = "foo1X$pid";
qt1( "$iptables $iptablesw -N $sillyname" );
qt1( "$iptables $iptablesw -N $sillyname1" );
fatal_error 'Your kernel/iptables do not include state match support. No version of Shorewall will run on this system'
unless
qt1( "$iptables $iptablesw -A $sillyname -m conntrack --ctstate ESTABLISHED,RELATED -j ACCEPT") ||
qt1( "$iptables $iptablesw -A $sillyname -m state --state ESTABLISHED,RELATED -j ACCEPT");;
$globals{KLUDGEFREE} = $capabilities{KLUDGEFREE} = detect_capability 'KLUDGEFREE';
unless ( $config{ LOAD_HELPERS_ONLY } ) {
#
# Using 'detect_capability()' is a bit less efficient than calling the individual detection
# functions but it ensures that %detect_capability is initialized properly.
#
$capabilities{NAT_ENABLED} = detect_capability( 'NAT_ENABLED' );
$capabilities{PERSISTENT_SNAT} = detect_capability( 'PERSISTENT_SNAT' );
$capabilities{MANGLE_ENABLED} = detect_capability( 'MANGLE_ENABLED' );
if ( $capabilities{CONNTRACK_MATCH} = detect_capability( 'CONNTRACK_MATCH' ) ) {
$capabilities{NEW_CONNTRACK_MATCH} = detect_capability( 'NEW_CONNTRACK_MATCH' );
$capabilities{OLD_CONNTRACK_MATCH} = detect_capability( 'OLD_CONNTRACK_MATCH' );
} else {
$capabilities{NEW_CONNTRACK_MATCH} = '';
$capabilities{OLD_CONNTRACK_MATCH} = '';
}
$capabilities{ MULTIPORT } = detect_capability( 'MULTIPORT' );
$capabilities{XMULTIPORT} = detect_capability( 'XMULTIPORT' );
$capabilities{EMULTIPORT} = detect_capability( 'EMULTIPORT' );
$capabilities{POLICY_MATCH} = detect_capability( 'POLICY_MATCH' );
if ( $capabilities{PHYSDEV_MATCH} = detect_capability( 'PHYSDEV_MATCH' ) ) {
$capabilities{PHYSDEV_BRIDGE} = detect_capability( 'PHYSDEV_BRIDGE' );
} else {
$capabilities{PHYSDEV_BRIDGE} = '';
}
$capabilities{IPRANGE_MATCH} = detect_capability( 'IPRANGE_MATCH' );
$capabilities{RECENT_MATCH} = detect_capability( 'RECENT_MATCH' );
$capabilities{OWNER_MATCH} = detect_capability( 'OWNER_MATCH' );
$capabilities{OWNER_NAME_MATCH}
= detect_capability( 'OWNER_NAME_MATCH' );
$capabilities{CONNMARK_MATCH} = detect_capability( 'CONNMARK_MATCH' );
$capabilities{XCONNMARK_MATCH} = detect_capability( 'XCONNMARK_MATCH' );
$capabilities{IPP2P_MATCH} = detect_capability( 'IPP2P_MATCH' );
$capabilities{OLD_IPP2P_MATCH} = detect_capability( 'OLD_IPP2P_MATCH' );
$capabilities{LENGTH_MATCH} = detect_capability( 'LENGTH_MATCH' );
$capabilities{ENHANCED_REJECT} = detect_capability( 'ENHANCED_REJECT' );
$capabilities{COMMENTS} = detect_capability( 'COMMENTS' );
$capabilities{OLD_HL_MATCH} = detect_capability( 'OLD_HL_MATCH' );
$capabilities{HASHLIMIT_MATCH} = detect_capability( 'HASHLIMIT_MATCH' );
$capabilities{MARK} = detect_capability( 'MARK' );
$capabilities{XMARK} = detect_capability( 'XMARK' );
$capabilities{EXMARK} = detect_capability( 'EXMARK' );
$capabilities{CONNMARK} = detect_capability( 'CONNMARK' );
$capabilities{XCONNMARK} = detect_capability( 'XCONNMARK' );
$capabilities{CLASSIFY_TARGET} = detect_capability( 'CLASSIFY_TARGET' );
$capabilities{IPMARK_TARGET} = detect_capability( 'IPMARK_TARGET' );
$capabilities{TPROXY_TARGET} = detect_capability( 'TPROXY_TARGET' );
$capabilities{MANGLE_FORWARD} = detect_capability( 'MANGLE_FORWARD' );
$capabilities{RAW_TABLE} = detect_capability( 'RAW_TABLE' );
$capabilities{RAWPOST_TABLE} = detect_capability( 'RAWPOST_TABLE' );
$capabilities{IPSET_MATCH} = detect_capability( 'IPSET_MATCH' );
$capabilities{USEPKTTYPE} = detect_capability( 'USEPKTTYPE' );
$capabilities{ADDRTYPE} = detect_capability( 'ADDRTYPE' );
$capabilities{TCPMSS_MATCH} = detect_capability( 'TCPMSS_MATCH' );
$capabilities{NFQUEUE_TARGET} = detect_capability( 'NFQUEUE_TARGET' );
$capabilities{REALM_MATCH} = detect_capability( 'REALM_MATCH' );
$capabilities{CONNLIMIT_MATCH} = detect_capability( 'CONNLIMIT_MATCH' );
$capabilities{TIME_MATCH} = detect_capability( 'TIME_MATCH' );
$capabilities{GOTO_TARGET} = detect_capability( 'GOTO_TARGET' );
$capabilities{LOG_TARGET} = detect_capability( 'LOG_TARGET' );
$capabilities{ULOG_TARGET} = detect_capability( 'ULOG_TARGET' );
$capabilities{NFLOG_TARGET} = detect_capability( 'NFLOG_TARGET' );
$capabilities{LOGMARK_TARGET} = detect_capability( 'LOGMARK_TARGET' );
$capabilities{FLOW_FILTER} = detect_capability( 'FLOW_FILTER' );
$capabilities{FWMARK_RT_MASK} = detect_capability( 'FWMARK_RT_MASK' );
$capabilities{MARK_ANYWHERE} = detect_capability( 'MARK_ANYWHERE' );
$capabilities{ACCOUNT_TARGET} = detect_capability( 'ACCOUNT_TARGET' );
$capabilities{AUDIT_TARGET} = detect_capability( 'AUDIT_TARGET' );
$capabilities{IPSET_V5} = detect_capability( 'IPSET_V5' );
$capabilities{CONDITION_MATCH} = detect_capability( 'CONDITION_MATCH' );
$capabilities{IPTABLES_S} = detect_capability( 'IPTABLES_S' );
$capabilities{BASIC_FILTER} = detect_capability( 'BASIC_FILTER' );
$capabilities{CT_TARGET} = detect_capability( 'CT_TARGET' );
$capabilities{STATISTIC_MATCH} = detect_capability( 'STATISTIC_MATCH' );
$capabilities{IMQ_TARGET} = detect_capability( 'IMQ_TARGET' );
$capabilities{DSCP_MATCH} = detect_capability( 'DSCP_MATCH' );
$capabilities{DSCP_TARGET} = detect_capability( 'DSCP_TARGET' );
$capabilities{GEOIP_MATCH} = detect_capability( 'GEOIP_MATCH' );
$capabilities{RPFILTER_MATCH} = detect_capability( 'RPFILTER_MATCH' );
$capabilities{NFACCT_MATCH} = detect_capability( 'NFACCT_MATCH' );
$capabilities{CHECKSUM_TARGET} = detect_capability( 'CHECKSUM_TARGET' );
$capabilities{MASQUERADE_TGT} = detect_capability( 'MASQUERADE_TGT' );
$capabilities{UDPLITEREDIRECT} = detect_capability( 'UDPLITEREDIRECT' );
$capabilities{NEW_TOS_MATCH} = detect_capability( 'NEW_TOS_MATCH' );
unless ( have_capability 'CT_TARGET' ) {
$capabilities{HELPER_MATCH} = detect_capability 'HELPER_MATCH';
}
}
}
#
# Require the passed capability
#
sub require_capability( $$$ ) {
my ( $capability, $description, $singular ) = @_;
fatal_error "$description require${singular} $capdesc{$capability} in your kernel and iptables" unless have_capability $capability, 1;
}
#
# Return Kernel Version
#
sub kernel_version() {
$capabilities{KERNELVERSION}
}
#
# Set default config path
#
sub ensure_config_path() {
my $f = "$globals{SHAREDIR}/configpath";
unless ( $config{CONFIG_PATH} ) {
fatal_error "$f does not exist" unless -f $f;
open_file $f;
while ( read_a_line( NORMAL_READ ) ) {
if ( $currentline =~ /^\s*([a-zA-Z]\w*)=(.*?)\s*$/ ) {
my ($var, $val) = ($1, $2);
$config{$var} = ( $val =~ /\"([^\"]*)\"$/ ? $1 : $val ) if exists $config{$var};
} else {
fatal_error "Unrecognized entry";
}
}
fatal_error "CONFIG_PATH not found in $f" unless $config{CONFIG_PATH};
}
@config_path = split /:/, $config{CONFIG_PATH};
for ( @config_path ) {
$_ .= '/' unless m|/$|;
}
if ( $shorewall_dir ) {
$shorewall_dir = getcwd if $shorewall_dir =~ m|^(\./*)+$|;
$shorewall_dir .= '/' unless $shorewall_dir =~ m|/$|;
unshift @config_path, $shorewall_dir if $shorewall_dir ne $config_path[0];
$config{CONFIG_PATH} = join ':', @config_path;
}
}
#
# Set $shorewall_dir
#
sub set_shorewall_dir( $ ) {
$shorewall_dir = shift;
ensure_config_path;
}
#
# Update the configuration file
#
sub conditional_quote( $ ) {
my $val = shift;
unless ( $val =~ /^[-\w\/\.]*$/ ) {
#
# Funny characters (including whitespace) -- use double quotes unless the thing is single-quoted
#
$val = qq("$val") unless $val =~ /^'.+'$/;
}
$val;
}
#
# Update the shorewall[6].conf file. Save the current file with a .bak suffix.
#
sub update_config_file( $$ ) {
my ( $annotate, $directives ) = @_;
sub is_set( $ ) {
my $value = $_[0];
defined( $value ) && lc( $value ) eq 'yes';
}
my $wide = is_set $config{WIDE_TC_MARKS};
my $high = is_set $config{HIGH_ROUTE_MARKS};
#
# Establish default values for the mark layout items
#
$config{TC_BITS} = ( $wide ? 14 : 8 ) unless defined $config{TC_BITS};
$config{MASK_BITS} = ( $wide ? 16 : 8 ) unless defined $config{MASK_BITS};
$config{PROVIDER_OFFSET} = ( $high ? $wide ? 16 : 8 : 0 ) unless defined $config{PROVIDER_OFFSET};
$config{PROVIDER_BITS} = 8 unless defined $config{PROVIDER_BITS};
my $fn;
unless ( -d "$globals{SHAREDIR}/configfiles/" ) {
#
# Debian or derivative
#
$fn = $annotate ? "$shorewallrc{SHAREDIR}/doc/${product}/default-config/${product}.conf.annotated" : "$shorewallrc{SHAREDIR}/doc/${product}/default-config/${product}.conf";
} else {
#
# The rest of the World
#
$fn = $annotate ? "$globals{SHAREDIR}/configfiles/${product}.conf.annotated" : "$globals{SHAREDIR}/configfiles/${product}.conf";
}
if ( -f $fn ) {
my ( $template, $output );
open $template, '<' , $fn or fatal_error "Unable to open $fn: $!";
unless ( open $output, '>', "$configfile.updated" ) {
close $template;
fatal_error "Unable to open $configfile.updated for output: $!";
}
while ( <$template> ) {
if ( /^(\w+)="?(.*?)"?$/ ) {
#
# Option assignment -- get value and default
#
my ($var, $val, $default ) = ( $1, $config{$1}, $2 );
unless ( supplied $val ) {
#
# Value is either undefined (option not in config file) or is ''
#
if ( defined $val ) {
#
# OPTION='' - use default if 'Yes' or 'No'
#
$config{$var} = $val = $default if $default eq 'Yes' || $default eq 'No';
} else {
#
# Wasn't mentioned in old file - use default value
#
$config{$var} = $val = $default;
}
}
$val = conditional_quote $val;
$_ = "$var=$val\n";
}
print $output "$_";
}
close $template;
my $heading_printed;
for ( grep ! $converted{$_} , keys %deprecated ) {
if ( supplied( my $val = $config{$_} ) ) {
if ( lc $val ne $deprecated{$_} ) {
unless ( $heading_printed ) {
print $output <<'EOF';
#################################################################################
# D E P R E C A T E D
# O P T I O N S
#################################################################################
EOF
$heading_printed = 1;
}
$val = conditional_quote $val;
print $output "$_=$val\n\n";
warning_message "Deprecated option $_ is being set in your $product.conf file";
}
}
}
close $output;
fatal_error "Can't rename $configfile to $configfile.bak: $!" unless rename $configfile, "$configfile.bak";
fatal_error "Can't rename $configfile.updated to $configfile: $!" unless rename "$configfile.updated", $configfile;
if ( system( "diff -q $configfile $configfile.bak > /dev/null" ) ) {
progress_message3 "Configuration file $configfile updated - old file renamed $configfile.bak";
} else {
if ( rename "$configfile.bak", $configfile ) {
progress_message3 "No update required to configuration file $configfile; $configfile.bak not saved";
} else {
warning_message "Unable to rename $configfile.bak to $configfile";
progress_message3 "No update required to configuration file $configfile";
}
exit 0 unless $directives || -f find_file 'blacklist';
}
} else {
fatal_error "$fn does not exist";
}
}
#
# Small functions called by get_configuration. We separate them so profiling is more useful
#
sub process_shorewall_conf( $$$ ) {
my ( $update, $annotate, $directives ) = @_;
my $file = find_file "$product.conf";
if ( -f $file ) {
$globals{CONFIGDIR} = $configfile = $file;
$globals{CONFIGDIR} =~ s/$product.conf//;
if ( -r _ ) {
open_file $file;
first_entry "Processing $file...";
#
# Don't expand shell variables or allow embedded scripting
#
while ( read_a_line( STRIP_COMMENTS | SUPPRESS_WHITESPACE | CHECK_GUNK ) ) {
if ( $currentline =~ /^\s*([a-zA-Z]\w*)=(.*?)\s*$/ ) {
my ($var, $val) = ($1, $2);
unless ( exists $config{$var} ) {
if ( exists $renamed{$var} ) {
$var = $renamed{$var};
} else {
warning_message "Unknown configuration option ($var) ignored";
next ;
}
}
$config{$var} = ( $val =~ /\"([^\"]*)\"$/ ? $1 : $val );
warning_message "Option $var=$val is deprecated"
if $deprecated{$var} && supplied $val && lc $config{$var} ne $deprecated{$var};
} else {
fatal_error "Unrecognized $product.conf entry";
}
}
} else {
fatal_error "Cannot read $file (Hint: Are you root?)";
}
} else {
fatal_error "$file does not exist!";
}
#
# Now update the config file if asked
#
update_config_file( $annotate, $directives ) if $update;
#
# Config file update requires that the option values not have
# Shell variables expanded. We do that now.
#
for ( values %config ) {
if ( supplied $_ ) {
expand_variables( $_ ) unless /^'(.+)'$/;
}
}
}
#
# Process the records in the capabilities file
#
sub read_capabilities() {
while ( read_a_line( STRIP_COMMENTS | SUPPRESS_WHITESPACE | CHECK_GUNK ) ) {
if ( $currentline =~ /^([a-zA-Z]\w*)=(.*)$/ ) {
my ($var, $val) = ($1, $2);
unless ( exists $capabilities{$var} ) {
warning_message "Unknown capability ($var) ignored";
next;
}
$val = $val =~ /^\"([^\"]*)\"$/ ? $1 : $val;
$capabilities{$var} = $var =~ /VERSION$/ ? $val : $val ne '';
} else {
fatal_error "Unrecognized capabilities entry";
}
}
unless ( $capabilities{KERNELVERSION} ) {
warning_message "Your capabilities file does not contain a Kernel Version -- using 2.6.30";
$capabilities{KERNELVERSION} = 20630;
}
$helpers_aliases{ftp} = 'ftp-0', $capabilities{FTP_HELPER} = 1 if $capabilities{FTP0_HELPER};
$helpers_aliases{irc} = 'irc-0', $capabilities{IRC_HELPER} = 1 if $capabilities{IRC0_HELPER};
$helpers_aliases{sane} = 'sane-0', $capabilities{SANE_HELPER} = 1 if $capabilities{SANE0_HELPER};
$helpers_aliases{sip} = 'sip-0', $capabilities{SIP_HELPER} = 1 if $capabilities{SIP0_HELPER};
$helpers_aliases{tftp} = 'tftp-0', $capabilities{TFTP_HELPER} = 1 if $capabilities{TFTP0_HELPER};
for ( keys %capabilities ) {
$capabilities{$_} = '' unless defined $capabilities{$_};
}
$globals{KLUDGEFREE} = $capabilities{KLUDGEFREE};
}
#
# Get the system's capabilities, either by probing or by reading a capabilities file
#
sub get_capabilities( $ )
{
my $export = $_[0];
if ( ! $export && $> == 0 ) { # $> == $EUID
$iptables = $config{$toolNAME};
if ( $iptables ) {
fatal_error "$toolNAME=$iptables does not exist or is not executable" unless -x $iptables;
} else {
fatal_error "Can't find $toolname executable" unless $iptables = which $toolname;
}
#
# Determine if iptables supports the -w option
#
$iptablesw = qt1( "$iptables -w -L -n") ? '-w' : '';
my $iptables_restore=$iptables . '-restore';
fatal_error "$iptables_restore does not exist or is not executable" unless -x $iptables_restore;
$tc = $config{TC} || which 'tc';
if ( $tc ) {
fatal_error "TC=$tc does not exist or is not executable" unless -x $tc;
}
$ip = $config{IP} || which 'ip';
if ( $ip ) {
fatal_error "IP=$ip does not exist or is not executable" unless -x $ip;
}
load_kernel_modules;
if ( open_file 'capabilities' ) {
read_capabilities;
} else {
determine_capabilities;
}
} else {
unless ( open_file 'capabilities' ) {
fatal_error "The -e compiler option requires a capabilities file" if $export;
fatal_error "Compiling under non-root uid requires a capabilities file";
}
read_capabilities;
}
}
#
# Deal with options that we no longer support
#
sub unsupported_yes_no( $ ) {
my $option = shift;
default_yes_no $option, '';
fatal_error "$option=Yes is not supported by Shorewall $globals{VERSION}" if $config{$option};
}
sub unsupported_yes_no_warning( $ ) {
my $option = shift;
default_yes_no $option, '';
warning_message "$option=Yes is not supported by Shorewall $globals{VERSION}" if $config{$option};
}
#
# Process the params file
#
sub get_params() {
my $fn = find_file 'params';
my %reserved = ( COMMAND => 1, CONFDIR => 1, SHAREDIR => 1, VARDIR => 1 );
if ( -f $fn ) {
progress_message2 "Processing $fn ...";
my $command = "$FindBin::Bin/getparams $fn " . join( ':', @config_path ) . " $family";
#
# getparams silently sources the params file under 'set -a', then executes 'export -p'
#
my @params = `$command`;
fatal_error "Processing of $fn failed" if $?;
if ( $debug ) {
print "Params:\n";
print $_ for @params;
}
my ( $variable , $bug );
if ( $params[0] =~ /^declare/ ) {
#
# getparams was interpreted by bash
#
# - Variable names are preceded by 'declare -x '
# - Param values are delimited by double quotes
# - Embedded double quotes are escaped with '\\'
# - Valueless variables are supported (e.g., 'declare -x foo')
#
$shell = BASH;
for ( @params ) {
if ( /^declare -x (.*?)="(.*[^\\])"$/ ) {
$params{$1} = $2 unless $1 eq '_';
} elsif ( /^declare -x (.*?)="(.*)$/ ) {
$params{$variable=$1} = $2 eq '"' ? '' : "${2}\n";
} elsif ( /^declare -x (.*)\s+$/ || /^declare -x (.*)=""$/ ) {
$params{$1} = '';
} else {
chomp;
if ($variable) {
s/"$//;
$params{$variable} .= $_;
} else {
warning_message "Param line ($_) ignored" unless $bug++;
}
}
}
} elsif ( $params[0] =~ /^export .*?="/ || $params[0] =~ /^export [^\s=]+\s*$/ ) {
#
# getparams interpreted by older (e.g., RHEL 5) Bash
#
# - Variable names preceded by 'export '
# - Variable values are delimited by double quotes
# - Embedded double quotes are escaped with '\'
# - Valueless variables ( e.g., 'export foo') are supported
#
$shell = OLDBASH;
for ( @params ) {
if ( /^export (.*?)="(.*[^\\])"$/ ) {
$params{$1} = $2 unless $1 eq '_';
} elsif ( /^export (.*?)="(.*)$/ ) {
$params{$variable=$1} = $2 eq '"' ? '' : "${2}\n";
} elsif ( /^export ([^\s=]+)\s*$/ || /^export (.*)=""$/ ) {
$params{$1} = '';
} else {
chomp;
if ($variable) {
s/"$//;
$params{$variable} .= $_;
} else {
warning_message "Param line ($_) ignored" unless $bug++;
}
}
}
} else {
#
# getparams was interpreted by dash/ash/busybox
#
# - Variable name preceded by 'export '
# - Param values are delimited by single quotes.
# - Embedded single quotes are transformed to the five characters '"'"'
#
$shell = ASH;
for ( @params ) {
if ( /^export (.*?)='(.*'"'"')$/ ) {
$params{$variable=$1}="${2}\n";
} elsif ( /^export (.*?)='(.*)'$/ ) {
$params{$1} = $2 unless $1 eq '_';
} elsif ( /^export (.*?)='(.*)$/ ) {
$params{$variable=$1}="${2}\n";
} else {
chomp;
if ($variable) {
s/'$//;
$params{$variable} .= $_;
} else {
warning_message "Param line ($_) ignored" unless $bug++;
}
}
}
}
for ( keys %params ) {
unless ( $_ eq 'SHOREWALL_INIT_SCRIPT' ) {
fatal_error "The variable name $_ is reserved and may not be set in the params file"
if /^SW_/ || /^SHOREWALL_/ || ( exists $config{$_} && ! exists $ENV{$_} ) || exists $reserved{$_};
}
}
if ( $debug ) {
print "PARAMS:\n";
my $value;
while ( ($variable, $value ) = each %params ) {
print " $variable='$value'\n" unless $compiler_params{$variable};
}
}
}
add_variables %params;
}
#
# Add an entry to %param, %variabless and to %compiler_params
#
sub add_param( $$ ) {
my ( $param, $value ) = @_;
$params{$param} = $value;
$variables{$param} = $value;
$compiler_params{$param} = 1;
}
#
# Add variables from a hash
#
sub add_variables( \% ) {
while ( my ( $var, $val ) = each %{$_[0]} ) {
$variables{$var} = $val;
}
}
#
# emit param=value for each param set in the params file
#
sub export_params() {
my $count = 0;
for my $param ( sort keys %params ) {
#
# Don't export params added by the compiler
#
next if exists $compiler_params{$param};
my $value = $params{$param};
#
# Values in %params are generated from the output of 'export -p'.
# The different shells have different conventions for delimiting
# the value and for escaping embedded instances of the delimiter.
# The following logic removes the escape characters.
#
if ( $shell == BASH ) {
$value =~ s/\\"/"/g;
} elsif ( $shell == OLDBASH ) {
$value =~ s/\\'/'/g;
} else {
$value =~ s/'"'"'/'/g;
}
#
# Don't export pairs from %ENV
#
next if defined $ENV{$param} && $value eq $ENV{$param};
emit "#\n# From the params file\n#" unless $count++;
#
# We will use double quotes and escape embedded quotes with \.
#
if ( $value =~ /[\s()['"]/ ) {
$value =~ s/"/\\"/g;
emit "$param='$value'";
} else {
emit "$param=$value";
}
}
}
#
# Walk the CONFIG_PATH converting FORMAT and COMMENT lines to compiler directives
#
sub convert_to_directives() {
my $sharedir = $shorewallrc{SHAREDIR};
#
# Make a copy of @config_path so that the for-loop below doesn't clobber that list
#
my @path = @config_path;
$sharedir =~ s|/+$||;
my $dirtest = qr|^$sharedir/+shorewall6?(?:/.*)?$|;
progress_message3 "Converting 'FORMAT' and 'COMMENT' lines to compiler directives...";
for my $dir ( @path ) {
unless ( $dir =~ /$dirtest/ ) {
if ( ! -w $dir ) {
warning_message "$dir not processed (not writeable)";
} else {
$dir =~ s|/+$||;
opendir( my $dirhandle, $dir ) || fatal_error "Cannot open directory $dir for reading:$!";
while ( my $file = readdir( $dirhandle ) ) {
unless ( $file eq 'capabilities' ||
$file eq 'params' ||
$file =~ /^shorewall6?.conf$/ ||
$file =~ /\.bak$/ ) {
$file = "$dir/$file";
if ( -f $file && -w _ ) {
#
# writeable regular file
#
my $result = system << "EOF";
perl -pi.bak -e '/^\\s*FORMAT\\s*/ && s/FORMAT/?FORMAT/;
if ( /^\\s*COMMENT\\s+/ ) {
s/COMMENT/?COMMENT/;
} elsif ( /^\\s*COMMENT\\s*\$/ ) {
s/COMMENT/?COMMENT/;
}' $file
EOF
if ( $result == 0 ) {
if ( system( "diff -q $file ${file}.bak > /dev/null" ) ) {
progress_message3 " File $file updated - old file renamed ${file}.bak";
} elsif ( rename "${file}.bak" , $file ) {
progress_message " File $file not updated -- no bare 'COMMENT' or 'FORMAT' lines found";
} else {
warning message "Unable to rename ${file}.bak to $file:$!";
}
} else {
warning_message ("Unable to update file ${file}.bak:$!" );
}
} else {
warning_message( "$file skipped (not writeable)" ) unless -d _;
}
}
}
closedir $dirhandle;
}
}
}
}
#
# - Process the params file
# - Read the shorewall.conf file
# - Read the capabilities file, if any
# - establish global hashes %params, %config , %globals and %capabilities
#
sub get_configuration( $$$$ ) {
my ( $export, $update, $annotate, $directives ) = @_;
$globals{EXPORT} = $export;
our ( $once, @originalinc );
@originalinc = @INC unless $once++;
ensure_config_path;
get_params;
process_shorewall_conf( $update, $annotate, $directives );
ensure_config_path;
@INC = @originalinc;
unshift @INC, @config_path;
default 'PATH' , '/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/sbin:/usr/local/bin';
#
# get_capabilities requires that the true settings of these options be established
#
default 'MODULE_PREFIX', 'ko ko.gz o o.gz gz';
default_yes_no 'LOAD_HELPERS_ONLY' , '';
get_capabilities( $export );
my ( $val, $all );
if ( supplied ( $val = $config{HELPERS} ) ) {
if ( $val eq 'none' ) {
$val = '';
}
} else {
$val = join( ',', grep $_ !~ /-0$/, keys %helpers_enabled );
$all = 1;
}
if ( supplied $val ) {
my %helpers_temp = %helpers_enabled;
$helpers_temp{$_} = 0 for keys %helpers_temp;
my @helpers = split_list ( $val, 'helper' );
for ( @helpers ) {
my $name = $_;
if ( exists $helpers_enabled{$name} ) {
s/-/_/;
if ( $all ) {
$helpers_temp{$name} = 1 if have_capability uc( $_ ) . '_HELPER' , 1;
} else {
require_capability( uc( $_ ) . '_HELPER' , "The $name helper", 's' );
$helpers_temp{$name} = 1;
}
} else {
fatal_error "Unknown Helper ($_)";
}
}
%helpers_enabled = %helpers_temp;
while ( my ( $helper, $enabled ) = each %helpers_enabled ) {
unless ( $enabled ) {
$helper =~ s/-0/0/;
$helper =~ s/-/_/;
$capabilities{uc($helper) . '_HELPER'} = 0;
}
}
} elsif ( have_capability 'CT_TARGET' ) {
$helpers_enabled{$_} = 0 for keys %helpers_enabled;
$capabilities{$_} = 0 for grep /_HELPER/ , keys %capabilities;
}
report_capabilities unless $config{LOAD_HELPERS_ONLY};
#
# Now initialize the used capabilities hash
#
%used = ();
if ( have_capability 'CONNTRACK_MATCH') {
$used{CONNTRACK_MATCH} = REQUIRED;
} else {
$used{STATE_MATCH} = REQUIRED;
}
#
# The following is not documented as it is not likely useful to the user base in general
# Going forward, it allows me to create a configuration that will work on multiple
# Shorewall versions. TME
#
$config{VERSION} = sprintf "%d%02d%02d", $1, $2, $3 if $globals{VERSION} =~ /^(\d+)\.(\d+)\.(\d+)/;
if ( my $rate = $config{LOGLIMIT} ) {
my $limit;
if ( $rate =~ /^[sd]:/ ) {
require_capability 'HASHLIMIT_MATCH', 'Per-ip log rate limiting' , 's';
$limit = "-m hashlimit ";
my $match = have_capability( 'OLD_HL_MATCH' ) ? 'hashlimit' : 'hashlimit-upto';
my $units;
if ( $rate =~ /^[sd]:((\d+)(\/(sec|min|hour|day))):(\d+)$/ ) {
fatal_error "Invalid rate ($1)" unless $2;
fatal_error "Invalid burst value ($5)" unless $5;
$limit .= "--$match $1 --hashlimit-burst $5 --hashlimit-name lograte --hashlimit-mode ";
$units = $4;
} elsif ( $rate =~ /^[sd]:((\d+)(\/(sec|min|hour|day))?)$/ ) {
fatal_error "Invalid rate ($1)" unless $2;
$limit .= "--$match $1 --hashlimit-name lograte --hashlimit-mode ";
$units = $4;
} else {
fatal_error "Invalid rate ($rate)";
}
$limit .= $rate =~ /^s:/ ? 'srcip ' : 'dstip ';
if ( $units && $units ne 'sec' ) {
my $expire = 60000; # 1 minute in milliseconds
if ( $units ne 'min' ) {
$expire *= 60; #At least an hour
$expire *= 24 if $units eq 'day';
}
$limit .= "--hashlimit-htable-expire $expire ";
}
} elsif ( $rate =~ /^((\d+)(\/(sec|min|hour|day))):(\d+)$/ ) {
fatal_error "Invalid rate ($1)" unless $2;
fatal_error "Invalid burst value ($5)" unless $5;
$limit = "-m limit --limit $1 --limit-burst $5 ";
} elsif ( $rate =~ /^(\d+)(\/(sec|min|hour|day))?$/ ) {
fatal_error "Invalid rate (${1}${2})" unless $1;
$limit = "-m limit --limit $rate ";
} else {
fatal_error "Invalid rate ($rate)";
}
$globals{LOGLIMIT} = $limit;
warning_message "LOGRATE Ignored when LOGLIMIT is specified" if $config{LOGRATE};
warning_message "LOGBURST Ignored when LOGLIMIT is specified" if $config{LOGBURST};
} elsif ( $config{LOGRATE} || $config{LOGBURST} ) {
if ( supplied $config{LOGRATE} ) {
fatal_error"Invalid LOGRATE ($config{LOGRATE})" unless $config{LOGRATE} =~ /^\d+\/(second|minute)$/;
}
if ( supplied $config{LOGBURST} ) {
fatal_error"Invalid LOGBURST ($config{LOGBURST})" unless $config{LOGBURST} =~ /^\d+$/;
}
$globals{LOGLIMIT} = '-m limit ';
$globals{LOGLIMIT} .= "--limit $config{LOGRATE} " if supplied $config{LOGRATE};
$globals{LOGLIMIT} .= "--limit-burst $config{LOGBURST} " if supplied $config{LOGBURST};
} else {
$globals{LOGLIMIT} = '';
}
if ( $globals{LOGLIMIT} ) {
my $loglimit = $globals{LOGLIMIT};
$loglimit =~ s/ $//;
my @loglimit = ( split ' ', $loglimit, 3 )[1,2];
$globals{LOGILIMIT} = \@loglimit;
} else {
$globals{LOGILIMIT} = [];
}
check_trivalue ( 'IP_FORWARDING', 'on' );
if ( have_capability( 'KERNELVERSION' ) < 20631 ) {
check_trivalue ( 'ROUTE_FILTER', '' );
} else {
$val = $config{ROUTE_FILTER};
if ( supplied $val ) {
if ( $val =~ /\d+/ ) {
fatal_error "Invalid value ($val) for ROUTE_FILTER" unless $val < 3;
} else {
check_trivalue( 'ROUTE_FILTER', '' );
}
} else {
check_trivalue( 'ROUTE_FILTER', '' );
}
}
if ( $family == F_IPV6 ) {
$val = $config{ROUTE_FILTER};
fatal_error "ROUTE_FILTER=$val is not supported in IPv6" if $val && $val ne 'off';
}
if ( $family == F_IPV4 ) {
check_trivalue ( 'LOG_MARTIANS', 'on' );
} else {
check_trivalue ( 'LOG_MARTIANS', 'off' );
fatal_error "LOG_MARTIANS=On is not supported in IPv6" if $config{LOG_MARTIANS} eq 'on';
}
default 'STARTUP_LOG' , '';
if ( $config{STARTUP_LOG} ne '' ) {
if ( supplied $config{LOG_VERBOSITY} ) {
if ( $config{LOG_VERBOSITY} eq '' ) {
$config{LOG_VERBOSITY} = 2;
} else {
my $val = numeric_value( $config{LOG_VERBOSITY} );
fatal_error "Invalid LOG_VERBOSITY ($config{LOG_VERBOSITY} )" unless defined( $val ) && ( $val >= -1 ) && ( $val <= 2 );
$config{STARTUP_LOG} = '' if $config{LOG_VERBOSITY} < 0;
$config{LOG_VERBOSITY} = $val;
}
} else {
$config{LOG_VERBOSITY} = 2;
}
} else {
$config{LOG_VERBOSITY} = -1;
}
default_yes_no 'ADD_IP_ALIASES' , 'Yes';
default_yes_no 'ADD_SNAT_ALIASES' , '';
default_yes_no 'DETECT_DNAT_IPADDRS' , '';
default_yes_no 'DETECT_DNAT_IPADDRS' , '';
default_yes_no 'CLEAR_TC' , $family == F_IPV4 ? 'Yes' : '';
if ( supplied $config{CLAMPMSS} ) {
default_yes_no 'CLAMPMSS' , '' unless $config{CLAMPMSS} =~ /^\d+$/;
} else {
$config{CLAMPMSS} = '';
}
unless ( $config{ADD_IP_ALIASES} || $config{ADD_SNAT_ALIASES} ) {
$config{RETAIN_ALIASES} = '';
} else {
default_yes_no_ipv4 'RETAIN_ALIASES' , '';
}
default_yes_no 'ADMINISABSENTMINDED' , '';
default_yes_no 'DISABLE_IPV6' , '';
unsupported_yes_no_warning 'DYNAMIC_ZONES';
unsupported_yes_no 'BRIDGING';
unsupported_yes_no_warning 'RFC1918_STRICT';
default_yes_no 'SAVE_IPSETS' , '';
default_yes_no 'SAVE_ARPTABLES' , '';
default_yes_no 'STARTUP_ENABLED' , 'Yes';
default_yes_no 'DELAYBLACKLISTLOAD' , '';
default_yes_no 'MAPOLDACTIONS' , 'Yes';
warning_message 'DELAYBLACKLISTLOAD=Yes is not supported by Shorewall ' . $globals{VERSION} if $config{DELAYBLACKLISTLOAD};
default_yes_no 'LOGTAGONLY' , ''; $globals{LOGTAGONLY} = $config{LOGTAGONLY};
default_yes_no 'FASTACCEPT' , '';
if ( supplied( $val = $config{BLACKLIST} ) ) {
my %states;
if ( $val eq 'ALL' ) {
$globals{BLACKLIST_STATES} = 'ALL';
} else {
for ( split_list $val, 'BLACKLIST' ) {
fatal_error "Invalid BLACKLIST state ($_)" unless /^(?:NEW|RELATED|ESTABLISHED|INVALID|UNTRACKED)$/;
fatal_error "Duplicate BLACKLIST state($_)" if $states{$_};
$states{$_} = 1;
}
fatal_error "ESTABLISHED state may not be specified when FASTACCEPT=Yes" if $config{FASTACCEPT} && $states{ESTABLISHED};
require_capability 'RAW_TABLE', 'UNTRACKED state', 's' if $states{UNTRACKED};
#
# Place the states in a predictable order
#
my @states;
for ( qw( NEW ESTABLISHED RELATED INVALID UNTRACKED ) ) {
push @states, $_ if $states{$_};
}
$globals{BLACKLIST_STATES} = join ',', @states;
}
} elsif ( supplied $config{BLACKLISTNEWONLY} ) {
default_yes_no 'BLACKLISTNEWONLY' , '';
fatal_error "BLACKLISTNEWONLY=No may not be specified with FASTACCEPT=Yes" if $config{FASTACCEPT} && ! $config{BLACKLISTNEWONLY};
if ( have_capability 'RAW_TABLE' ) {
$globals{BLACKLIST_STATES} = $config{BLACKLISTNEWONLY} ? 'NEW,INVALID,UNTRACKED' : 'NEW,ESTABLISHED,INVALID,UNTRACKED';
} else {
$globals{BLACKLIST_STATES} = $config{BLACKLISTNEWONLY} ? 'NEW,INVALID' : 'NEW,ESTABLISHED,INVALID';
}
} else {
if ( have_capability 'RAW_TABLE' ) {
$globals{BLACKLIST_STATES} = $config{FASTACCEPT} ? 'NEW,INVALID,UNTRACKED' : 'NEW,ESTABLISHED,INVALID,UNTRACKED';
} else {
$globals{BLACKLIST_STATES} = $config{FASTACCEPT} ? 'NEW,INVALID' : 'NEW,INVALID,ESTABLISHED';
}
}
default_yes_no 'IMPLICIT_CONTINUE' , '';
default_yes_no 'HIGH_ROUTE_MARKS' , '';
default_yes_no 'TC_EXPERT' , '';
default_yes_no 'USE_ACTIONS' , 'Yes';
warning_message 'USE_ACTIONS=No is not supported by Shorewall ' . $globals{VERSION} unless $config{USE_ACTIONS};
default_yes_no 'EXPORTPARAMS' , '';
default_yes_no 'EXPAND_POLICIES' , '';
default_yes_no 'KEEP_RT_TABLES' , '';
default_yes_no 'USE_RT_NAMES' , '';
default_yes_no 'DELETE_THEN_ADD' , 'Yes';
default_yes_no 'AUTOCOMMENT' , 'Yes';
default_yes_no 'MULTICAST' , '';
default_yes_no 'MARK_IN_FORWARD_CHAIN' , '';
default_yes_no 'CHAIN_SCRIPTS' , 'Yes';
default_yes_no 'TRACK_RULES' , '';
if ( $val = $config{REJECT_ACTION} ) {
fatal_error "Invalid Reject Action Name ($val)" unless $val =~ /^[a-zA-Z][\w-]*$/;
} else {
$config{REJECT_ACTION} = '';
}
require_capability 'COMMENTS', 'TRACK_RULES=Yes', 's' if $config{TRACK_RULES};
default_yes_no 'MANGLE_ENABLED' , have_capability( 'MANGLE_ENABLED' ) ? 'Yes' : '';
default_yes_no 'USE_DEFAULT_RT' , '';
default_yes_no 'RESTORE_DEFAULT_ROUTE' , 'Yes';
default_yes_no 'AUTOMAKE' , '';
default_yes_no 'WIDE_TC_MARKS' , '';
default_yes_no 'TRACK_PROVIDERS' , '';
unless ( ( $config{NULL_ROUTE_RFC1918} || '' ) =~ /^(?:blackhole|unreachable|prohibit)$/ ) {
default_yes_no( 'NULL_ROUTE_RFC1918', '' );
$config{NULL_ROUTE_RFC1918} = 'blackhole' if $config{NULL_ROUTE_RFC1918};
}
default_yes_no 'ACCOUNTING' , 'Yes';
default_yes_no 'OPTIMIZE_ACCOUNTING' , '';
if ( supplied $config{ACCOUNTING_TABLE} ) {
my $value = $config{ACCOUNTING_TABLE};
fatal_error "Invalid ACCOUNTING_TABLE setting ($value)" unless $value eq 'filter' || $value eq 'mangle';
} else {
$config{ACCOUNTING_TABLE} = 'filter';
}
default_yes_no 'DYNAMIC_BLACKLIST' , 'Yes';
default_yes_no 'REQUIRE_INTERFACE' , '';
default_yes_no 'FORWARD_CLEAR_MARK' , have_capability( 'MARK' ) ? 'Yes' : '';
default_yes_no 'COMPLETE' , '';
default_yes_no 'EXPORTMODULES' , '';
default_yes_no 'LEGACY_FASTSTART' , 'Yes';
default_yes_no 'USE_PHYSICAL_NAMES' , '';
default_yes_no 'IPSET_WARNINGS' , 'Yes';
default_yes_no 'AUTOHELPERS' , 'Yes';
default_yes_no 'RESTORE_ROUTEMARKS' , 'Yes';
default_yes_no 'IGNOREUNKNOWNVARIABLES' , 'Yes';
default_yes_no 'WARNOLDCAPVERSION' , 'Yes';
default_yes_no 'DEFER_DNS_RESOLUTION' , 'Yes';
$config{IPSET} = '' if supplied $config{IPSET} && $config{IPSET} eq 'ipset';
require_capability 'MARK' , 'FORWARD_CLEAR_MARK=Yes', 's', if $config{FORWARD_CLEAR_MARK};
numeric_option 'TC_BITS', $config{WIDE_TC_MARKS} ? 14 : 8 , 0;
numeric_option 'MASK_BITS', $config{WIDE_TC_MARKS} ? 16 : 8, $config{TC_BITS};
numeric_option 'PROVIDER_BITS' , 8, 0;
numeric_option 'PROVIDER_OFFSET' , $config{HIGH_ROUTE_MARKS} ? $config{WIDE_TC_MARKS} ? 16 : 8 : 0, 0;
numeric_option 'ZONE_BITS' , 0, 0;
require_capability 'MARK_ANYWHERE', 'A non-zero ZONE_BITS setting', 's' if $config{ZONE_BITS};
if ( $config{PROVIDER_OFFSET} ) {
$config{PROVIDER_OFFSET} = $config{MASK_BITS} if $config{PROVIDER_OFFSET} < $config{MASK_BITS};
$globals{ZONE_OFFSET} = $config{PROVIDER_OFFSET} + $config{PROVIDER_BITS};
} elsif ( $config{MASK_BITS} >= $config{PROVIDER_BITS} ) {
$globals{ZONE_OFFSET} = $config{MASK_BITS};
} else {
$globals{ZONE_OFFSET} = $config{PROVIDER_BITS};
}
#
# It is okay if the event mark is outside of the a 32-bit integer. We check that in IfEvent"
#
fatal_error 'Invalid Packet Mark layout' if $config{ZONE_BITS} + $globals{ZONE_OFFSET} > 30;
$globals{EXCLUSION_MASK} = 1 << ( $globals{ZONE_OFFSET} + $config{ZONE_BITS} );
$globals{TPROXY_MARK} = $globals{EXCLUSION_MASK} << 1;
$globals{EVENT_MARK} = $globals{TPROXY_MARK} << 1;
$globals{PROVIDER_MIN} = 1 << $config{PROVIDER_OFFSET};
$globals{TC_MAX} = make_mask( $config{TC_BITS} );
$globals{TC_MASK} = make_mask( $config{MASK_BITS} );
$globals{PROVIDER_MASK} = make_mask( $config{PROVIDER_BITS} ) << $config{PROVIDER_OFFSET};
if ( $config{ZONE_BITS} ) {
$globals{ZONE_MASK} = make_mask( $config{ZONE_BITS} ) << $globals{ZONE_OFFSET};
} else {
$globals{ZONE_MASK} = 0;
}
if ( ( my $userbits = $config{PROVIDER_OFFSET} - $config{TC_BITS} ) > 0 ) {
$globals{USER_MASK} = make_mask( $userbits ) << $config{TC_BITS};
$globals{USER_BITS} = $userbits;
} else {
$globals{USER_MASK} = $globals{USER_BITS} = 0;
}
if ( supplied ( $val = $config{ZONE2ZONE} ) ) {
fatal_error "Invalid ZONE2ZONE value ( $val )" unless $val =~ /^[2-]$/;
} else {
$config{ZONE2ZONE} = '2';
}
default 'BLACKLIST_DISPOSITION' , 'DROP';
unless ( ( $val = $config{BLACKLIST_DISPOSITION} ) =~ /^(?:A_)?DROP$/ || $config{BLACKLIST_DISPOSITION} =~ /^(?:A_)?REJECT/ ) {
fatal_error q(BLACKLIST_DISPOSITION must be 'DROP', 'A_DROP', 'REJECT' or 'A_REJECT');
}
require_capability 'AUDIT_TARGET', "BLACKLIST_DISPOSITION=$val", 's' if $val =~ /^A_/;
default 'SMURF_DISPOSITION' , 'DROP';
unless ( ( $val = $config{SMURF_DISPOSITION} ) =~ /^(?:A_)?DROP$/ ) {
fatal_error q(SMURF_DISPOSITION must be 'DROP' or 'A_DROP');
}
require_capability 'AUDIT_TARGET', "SMURF_DISPOSITION=$val", 's' if $val =~ /^A_/;
default_log_level 'BLACKLIST_LOG_LEVEL', '';
default_log_level 'MACLIST_LOG_LEVEL', '';
default_log_level 'TCP_FLAGS_LOG_LEVEL', '';
default_log_level 'RFC1918_LOG_LEVEL', '';
default_log_level 'RELATED_LOG_LEVEL', '';
default_log_level 'INVALID_LOG_LEVEL', '';
default_log_level 'UNTRACKED_LOG_LEVEL', '';
warning_message "RFC1918_LOG_LEVEL=$config{RFC1918_LOG_LEVEL} ignored. The 'norfc1918' interface/host option is no longer supported" if $config{RFC1918_LOG_LEVEL};
default_log_level 'SMURF_LOG_LEVEL', '';
default_log_level 'LOGALLNEW', '';
default_log_level 'SFILTER_LOG_LEVEL', 'info';
if ( $val = $config{SFILTER_DISPOSITION} ) {
fatal_error "Invalid SFILTER_DISPOSITION setting ($val)" unless $val =~ /^(A_)?(DROP|REJECT)$/;
require_capability 'AUDIT_TARGET' , "SFILTER_DISPOSITION=$val", 's' if $1;
} else {
$config{SFILTER_DISPOSITION} = 'DROP';
}
default_log_level 'RPFILTER_LOG_LEVEL', 'info';
if ( $val = $config{RPFILTER_DISPOSITION} ) {
fatal_error "Invalid RPFILTER_DISPOSITION setting ($val)" unless $val =~ /^(A_)?(DROP|REJECT)$/;
require_capability 'AUDIT_TARGET' , "RPFILTER_DISPOSITION=$val", 's' if $1;
} else {
$config{RPFILTER_DISPOSITION} = 'DROP';
}
if ( $val = $config{MACLIST_DISPOSITION} ) {
if ( $val =~ /^(?:A_)?DROP$/ ) {
$globals{MACLIST_TARGET} = $val;
} elsif ( $val eq 'REJECT' ) {
$globals{MACLIST_TARGET} = 'reject';
} elsif ( $val eq 'A_REJECT' ) {
$globals{MACLIST_TARGET} = $val;
} elsif ( $val eq 'ACCEPT' ) {
$globals{MACLIST_TARGET} = 'RETURN';
} else {
fatal_error "Invalid value ($config{MACLIST_DISPOSITION}) for MACLIST_DISPOSITION"
}
require_capability 'AUDIT_TARGET' , "MACLIST_DISPOSITION=$val", 's' if $val =~ /^A_/;
} else {
$config{MACLIST_DISPOSITION} = 'REJECT';
$globals{MACLIST_TARGET} = 'reject';
}
if ( $val = $config{RELATED_DISPOSITION} ) {
if ( $val =~ /^(?:A_)?(?:DROP|ACCEPT)$/ ) {
$globals{RELATED_TARGET} = $val;
} elsif ( $val eq 'REJECT' ) {
$globals{RELATED_TARGET} = 'reject';
} elsif ( $val eq 'A_REJECT' ) {
$globals{RELATED_TARGET} = $val;
} elsif ( $val eq 'CONTINUE' ) {
$globals{RELATED_TARGET} = '';
} else {
fatal_error "Invalid value ($config{RELATED_DISPOSITION}) for RELATED_DISPOSITION"
}
require_capability 'AUDIT_TARGET' , "RELATED_DISPOSITION=$val", 's' if $val =~ /^A_/;
} else {
$config{RELATED_DISPOSITION} =
$globals{RELATED_TARGET} = 'ACCEPT';
}
if ( $val = $config{INVALID_DISPOSITION} ) {
if ( $val =~ /^(?:A_)?DROP$/ ) {
$globals{INVALID_TARGET} = $val;
} elsif ( $val eq 'REJECT' ) {
$globals{INVALID_TARGET} = 'reject';
} elsif ( $val eq 'A_REJECT' ) {
$globals{INVALID_TARGET} = $val;
} elsif ( $val eq 'CONTINUE' ) {
$globals{INVALID_TARGET} = '';
} else {
fatal_error "Invalid value ($config{INVALID_DISPOSITION}) for INVALID_DISPOSITION"
}
require_capability 'AUDIT_TARGET' , "INVALID_DISPOSITION=$val", 's' if $val =~ /^A_/;
} else {
$config{INVALID_DISPOSITION} = 'CONTINUE';
$globals{INVALID_TARGET} = '';
}
if ( $val = $config{UNTRACKED_DISPOSITION} ) {
if ( $val =~ /^(?:A_)?(?:DROP|ACCEPT)$/ ) {
$globals{UNTRACKED_TARGET} = $val;
} elsif ( $val eq 'REJECT' ) {
$globals{UNTRACKED_TARGET} = 'reject';
} elsif ( $val eq 'A_REJECT' ) {
$globals{UNTRACKED_TARGET} = $val;
} elsif ( $val eq 'CONTINUE' ) {
$globals{UNTRACKED_TARGET} = '';
} else {
fatal_error "Invalid value ($config{UNTRACKED_DISPOSITION}) for UNTRACKED_DISPOSITION"
}
require_capability 'AUDIT_TARGET' , "UNTRACKED_DISPOSITION=$val", 's' if $val =~ /^A_/;
} else {
$config{UNTRACKED_DISPOSITION} = 'CONTINUE';
$globals{UNTRACKED_TARGET} = '';
}
if ( $val = $config{MACLIST_TABLE} ) {
if ( $val eq 'mangle' ) {
fatal_error 'MACLIST_DISPOSITION=$1 is not allowed with MACLIST_TABLE=mangle' if $config{MACLIST_DISPOSITION} =~ /^((?:A)?REJECT)$/;
} else {
fatal_error "Invalid value ($val) for MACLIST_TABLE option" unless $val eq 'filter';
}
} else {
default 'MACLIST_TABLE' , 'filter';
}
if ( $val = $config{TCP_FLAGS_DISPOSITION} ) {
fatal_error "Invalid value ($config{TCP_FLAGS_DISPOSITION}) for TCP_FLAGS_DISPOSITION" unless $val =~ /^(?:(A_)?(?:REJECT|DROP))|ACCEPT$/;
require_capability 'AUDIT_TARGET' , "TCP_FLAGS_DISPOSITION=$val", 's' if $1;
} else {
$val = $config{TCP_FLAGS_DISPOSITION} = 'DROP';
}
default 'TC_ENABLED' , $family == F_IPV4 ? 'Internal' : 'no';
$val = "\L$config{TC_ENABLED}";
if ( $val eq 'yes' ) {
my $file = find_file 'tcstart';
fatal_error "Unable to find tcstart file" unless -f $file;
$globals{TC_SCRIPT} = $file;
} elsif ( $val eq 'internal' ) {
$config{TC_ENABLED} = 'Internal';
} elsif ( $val eq 'shared' ) {
$config{TC_ENABLED} = 'Shared';
} elsif ( $val eq 'simple' ) {
$config{TC_ENABLED} = 'Simple';
} else {
fatal_error "Invalid value ($config{TC_ENABLED}) for TC_ENABLED" unless $val eq 'no';
$config{TC_ENABLED} = '';
}
if ( $config{TC_ENABLED} ) {
fatal_error "TC_ENABLED=$config{TC_ENABLED} is not allowed with MANGLE_ENABLED=No" unless $config{MANGLE_ENABLED};
require_capability 'MANGLE_ENABLED', "TC_ENABLED=$config{TC_ENABLED}", 's';
}
if ( $val = $config{TC_PRIOMAP} ) {
my @priomap = split ' ',$val;
fatal_error "Invalid TC_PRIOMAP ($val)" unless @priomap == 16;
for ( @priomap ) {
fatal_error "Invalid TC_PRIOMAP entry ($_)" unless /^[1-3]$/;
$_--;
}
$config{TC_PRIOMAP} = join ' ', @priomap;
} else {
$config{TC_PRIOMAP} = '1 2 2 2 1 2 0 0 1 1 1 1 1 1 1 1';
}
default 'RESTOREFILE' , 'restore';
default 'IPSECFILE' , 'zones';
default 'DROP_DEFAULT' , 'Drop';
default 'REJECT_DEFAULT' , 'Reject';
default 'QUEUE_DEFAULT' , 'none';
default 'NFQUEUE_DEFAULT' , 'none';
default 'ACCEPT_DEFAULT' , 'none';
default 'OPTIMIZE' , 0;
fatal_error 'IPSECFILE=ipsec is not supported by Shorewall ' . $globals{VERSION} if $config{IPSECFILE} eq 'ipsec';
fatal_error "Invalid IPSECFILE value ($config{IPSECFILE}" unless $config{IPSECFILE} eq 'zones';
for my $default ( qw/DROP_DEFAULT REJECT_DEFAULT QUEUE_DEFAULT NFQUEUE_DEFAULT ACCEPT_DEFAULT/ ) {
$config{$default} = 'none' if "\L$config{$default}" eq 'none';
}
if ( ( $val = $config{OPTIMIZE} ) =~ /^all$/i ) {
$config{OPTIMIZE} = $val = OPTIMIZE_ALL;
} elsif ( $val =~ /^none$/i ) {
$config{OPTIMIZE} = $val = 0;
} else {
$val = numeric_value $config{OPTIMIZE};
fatal_error "Invalid OPTIMIZE value ($config{OPTIMIZE})" unless supplied( $val ) && $val >= 0 && ( $val & ~OPTIMIZE_USE_FIRST ) <= OPTIMIZE_ALL;
}
require_capability 'XMULTIPORT', 'OPTIMIZE level 16', 's' if $val & 16;
$globals{MARKING_CHAIN} = $config{MARK_IN_FORWARD_CHAIN} ? 'tcfor' : 'tcpre';
if ( $val = $config{LOGFORMAT} ) {
my $result;
eval {
if ( $val =~ /%d/ ) {
$globals{LOGRULENUMBERS} = 'Yes';
$result = sprintf "$val", 'fooxx2barxx', 1, 'ACCEPT';
} else {
$result = sprintf "$val", 'fooxx2barxx', 'ACCEPT';
}
};
fatal_error "Invalid LOGFORMAT ($val)" if $@;
fatal_error "LOGFORMAT string is longer than 29 characters ($val)" if length $result > 29;
$globals{MAXZONENAMELENGTH} = int ( 5 + ( ( 29 - (length $result ) ) / 2) );
} else {
$config{LOGFORMAT}='Shorewall:%s:%s:';
$globals{MAXZONENAMELENGTH} = 5;
}
if ( $config{LOCKFILE} ) {
my ( $file, $dir, $suffix );
eval {
( $file, $dir, $suffix ) = fileparse( $config{LOCKFILE} );
};
cleanup, die $@ if $@;
fatal_error "LOCKFILE=$config{LOCKFILE}: Directory $dir does not exist" unless $export or -d $dir;
} else {
$config{LOCKFILE} = '';
}
require_capability( 'MULTIPORT' , "Shorewall $globals{VERSION}" , 's' );
require_capability( 'RECENT_MATCH' , 'MACLIST_TTL' , 's' ) if $config{MACLIST_TTL};
require_capability( 'XCONNMARK' , 'HIGH_ROUTE_MARKS=Yes' , 's' ) if $config{PROVIDER_OFFSET} > 0;
require_capability( 'MANGLE_ENABLED' , 'Traffic Shaping' , 's' ) if $config{TC_ENABLED};
if ( $config{WARNOLDCAPVERSION} ) {
if ( $capabilities{CAPVERSION} ) {
warning_message "Your capabilities file is out of date -- it does not contain all of the capabilities defined by $Product version $globals{VERSION}"
unless $capabilities{CAPVERSION} >= $globals{CAPVERSION};
} else {
warning_message "Your capabilities file may not contain all of the capabilities defined by $Product version $globals{VERSION}";
}
}
add_variables %config;
while ( my ($var, $val ) = each %renamed ) {
$variables{$var} = $config{$val};
}
convert_to_directives if $directives;
cleanup_iptables if $sillyname && ! $config{LOAD_HELPERS_ONLY};
}
#
# The values of the options in @propagateconfig are copied to the script file in OPTION=<value> format.
#
sub propagateconfig() {
for my $option ( @propagateconfig ) {
my $value = $config{$option};
$value = '' unless defined $value;
emit "$option=\"$value\"";
}
}
#
# Add a shell script file to the output script -- Return true if the
# file exists and is not in /usr/share/shorewall/ and is non-empty.
#
sub append_file( $;$$ ) {
my ( $file, $nomsg, $unindented ) = @_;
my $user_exit = find_file $file;
my $result = 0;
my $save_indent = $indent;
$indent = '' if $unindented;
unless ( $user_exit =~ m(^$shorewallrc{SHAREDIR}/shorewall6?/) ) {
if ( -f $user_exit ) {
if ( $nomsg ) {
#
# Suppress progress message
#
$result = copy1 $user_exit;
} else {
#
# Include progress message -- Pretend progress_message call was in the file
#
my $name = $globals{EXPORT} ? "$file user exit" : $user_exit;
$result = 1;
save_progress_message "Processing $name ...";
copy1 $user_exit;
}
}
}
$indent = $save_indent;
$result;
}
#
# Run a Perl extension script
#
sub run_user_exit( $ ) {
my $chainref = $_[0];
my $file = find_file $chainref->{name};
if ( $config{CHAIN_SCRIPTS} && -f $file ) {
progress_message2 "Running $file...";
my $command = qq(package Shorewall::User;\nno strict;\n# line 1 "$file"\n) . `cat $file`;
unless (my $return = eval $command ) {
fatal_error "Couldn't parse $file: $@" if $@;
unless ( defined $return ) {
fatal_error "Couldn't do $file: $!" if $!;
fatal_error "Couldn't do $file";
}
fatal_error "$file returned a false value";
}
}
}
sub run_user_exit1( $ ) {
my $file = find_file $_[0];
if ( -f $file ) {
progress_message2 "Running $file...";
#
# File may be empty -- in which case eval would fail
#
push_open $file;
if ( read_a_line( STRIP_COMMENTS | SUPPRESS_WHITESPACE | CHECK_GUNK ) ) {
close_file;
pop_open;
my $command = qq(package Shorewall::User;\n# line 1 "$file"\n) . `cat $file`;
unless (my $return = eval $command ) {
fatal_error "Couldn't parse $file: $@" if $@;
unless ( defined $return ) {
fatal_error "Couldn't do $file: $!" if $!;
fatal_error "Couldn't do $file";
}
fatal_error "$file returned a false value";
}
} else {
pop_open;
}
}
}
sub run_user_exit2( $$ ) {
my ($file, $chainref) = ( find_file $_[0], $_[1] );
if ( $config{CHAIN_SCRIPTS} && -f $file ) {
progress_message2 "Running $file...";
#
# File may be empty -- in which case eval would fail
#
push_open $file;
if ( read_a_line( STRIP_COMMENTS | SUPPRESS_WHITESPACE | CHECK_GUNK ) ) {
close_file;
pop_open;
unless (my $return = eval `cat $file` ) {
fatal_error "Couldn't parse $file: $@" if $@;
unless ( defined $return ) {
fatal_error "Couldn't do $file: $!" if $!;
fatal_error "Couldn't do $file";
}
fatal_error "$file returned a false value";
}
}
pop_open;
}
}
#
# Generate the aux config file for Shorewall Lite
#
sub generate_aux_config() {
sub conditionally_add_option( $ ) {
my $option = $_[0];
my $value = $config{$option};
emit "[ -n \"\${$option:=$value}\" ]" if supplied $value;
}
sub conditionally_add_option1( $ ) {
my $option = $_[0];
my $value = $config{$option};
emit "$option=\"$value\"" if $value;
}
create_temp_aux_config;
my $date = localtime;
emit "#\n# Shorewall auxiliary configuration file created by Shorewall version $globals{VERSION} - $date\n#";
for my $option ( qw(VERBOSITY LOGFILE LOGFORMAT ARPTABLES IPTABLES IP6TABLES IP TC IPSET PATH SHOREWALL_SHELL SUBSYSLOCK LOCKFILE RESTOREFILE) ) {
conditionally_add_option $option;
}
conditionally_add_option1 'TC_ENABLED';
my $fn = find_file 'scfilter';
if ( -f $fn ) {
emit( '',
'show_connections_filter() {' );
push_indent;
append_file( $fn,1 ) or emit 'cat -';
pop_indent;
emit '}';
}
$fn = find_file 'dumpfilter';
if ( -f $fn ) {
emit( '',
'dump_filter() {' );
push_indent;
append_file( $fn,1 ) or emit 'cat -';
pop_indent;
emit '}';
}
finalize_aux_config;
}
sub dump_mark_layout() {
sub dumpout( $$$$$ ) {
my ( $name, $bits, $min, $max, $mask ) = @_;
if ( $bits ) {
if ( $min == $max ) {
emit_unindented "$name:" . $min . ' mask ' . in_hex( $mask );
} else {
emit_unindented "$name:" . join('-', $min, $max ) . ' (' . join( '-', in_hex( $min ), in_hex( $max ) ) . ') mask ' . in_hex( $mask );
}
} else {
emit_unindented "$name: Not Enabled";
}
}
dumpout( "Traffic Shaping",
$config{TC_BITS},
0,
$globals{TC_MAX},
$globals{TC_MASK} );
dumpout( "User",
$globals{USER_BITS},
$globals{TC_MAX} + 1,
$globals{USER_MASK},
$globals{USER_MASK} );
dumpout( "Provider",
$config{PROVIDER_BITS},
$globals{PROVIDER_MIN},
$globals{PROVIDER_MASK},
$globals{PROVIDER_MASK} );
dumpout( "Zone",
$config{ZONE_BITS},
1 << $globals{ZONE_OFFSET},
$globals{ZONE_MASK},
$globals{ZONE_MASK} );
dumpout( "Exclusion",
1,
$globals{EXCLUSION_MASK},
$globals{EXCLUSION_MASK},
$globals{EXCLUSION_MASK} );
dumpout( "TProxy",
1,
$globals{TPROXY_MARK},
$globals{TPROXY_MARK},
$globals{TPROXY_MARK} );
}
sub report_used_capabilities() {
if ( $verbosity > 1 ) {
progress_message2 "Configuration uses these capabilities ('*' denotes required):";
for ( sort grep $_ ne 'KERNELVERSION', keys %used ) {
if ( ( $used{$_} || 0 ) & REQUIRED ) {
progress_message2 " $_*";
} else {
progress_message2 " $_";
}
}
}
}
END {
cleanup;
}
1;
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