forked from extern/shorewall_code
Handle disabled helpers in pre-3.5 kernels.
Signed-off-by: Tom Eastep <teastep@shorewall.net>
This commit is contained in:
Tom Eastep
parent
56caf3687f
commit
c007f847a0
@ -2022,14 +2022,19 @@ determine_capabilities() {
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NFACCT_MATCH=
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AMANDA_HELPER=
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FTP_HELPER=
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FTP0_HELPER=
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IRC_HELPER=
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IRC0_HELPER=
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NETBIOS_NS_HELPER=
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H323_HELPER=
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PPTP_HELPER=
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SANE_HELPER=
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SANE0_HELPER=
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SIP_HELPER=
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SIP0_HELPER=
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SNMP_HELPER=
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TFTP_HELPER=
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TFTP0_HELPER=
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chain=fooX$$
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@ -2196,14 +2201,19 @@ determine_capabilities() {
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qt $g_tool -t raw -A $chain -p udp --dport 10080 -j CT --helper amanda && AMANDA_HELPER=Yes
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qt $g_tool -t raw -A $chain -p tcp --dport 21 -j CT --helper ftp && FTP_HELPER=Yes
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qt $g_tool -t raw -A $chain -p tcp --dport 21 -j CT --helper ftp-0 && FTP0_HELPER=Yes
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qt $g_tool -t raw -A $chain -p udp --dport 1719 -j CT --helper RAS && H323_HELPER=Yes
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qt $g_tool -t raw -A $chain -p tcp --dport 6667 -j CT --helper irc && IRC_HELPER=Yes
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qt $g_tool -t raw -A $chain -p tcp --dport 6667 -j CT --helper irc-0 && IRC0_HELPER=Yes
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qt $g_tool -t raw -A $chain -p udp --dport 137 -j CT --helper netbios-ns && NETBIOS_NS_HELPER=Yes
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qt $g_tool -t raw -A $chain -p tcp --dport 1729 -j CT --helper pptp && PPTP_HELPER=Yes
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qt $g_tool -t raw -A $chain -p tcp --dport 6566 -j CT --helper sane && SANE_HELPER=Yes
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qt $g_tool -t raw -A $chain -p tcp --dport 6566 -j CT --helper sane-0 && SANE0_HELPER=Yes
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qt $g_tool -t raw -A $chain -p udp --dport 5060 -j CT --helper sip && SIP_HELPER=Yes
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qt $g_tool -t raw -A $chain -p udp --dport 5060 -j CT --helper sip-0 && SIP0_HELPER=Yes
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qt $g_tool -t raw -A $chain -p udp --dport 161 -j CT --helper snmp && SNMP_HELPER=Yes
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qt $g_tool -t raw -A $chain -p udp --dport 69 -j CT --helper tftp && TFTP_HELPER=Yes
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qt $g_tool -t raw -A $chain -p udp --dport 69 -j CT --helper tftp-0 && TFTP0_HELPER=Yes
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fi
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qt $g_tool -t raw -F $chain
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@ -2268,6 +2278,7 @@ determine_capabilities() {
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if [ -z "$CT_TARGET" ]; then
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AMANDA_HELPER=Yes
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FTP_HELPER=Yes
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FTP_HELPER=Yes
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H323_HELPER=Yes
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IRC_HELPER=Yes
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NS_HELPER=Yes
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@ -2408,14 +2419,19 @@ report_capabilities() {
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report_capability "NFAcct match" $NFACCT_MATCH
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report_capability "Amanda Helper" $AMANDA_HELPER
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report_capability "FTP Helper" $FTP_HELPER
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report_capability "FTP-0 Helper" $FTP0_HELPER
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report_capability "IRC Helper" $IRC_HELPER
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report_capability "IRC-0 Helper" $IRC0_HELPER
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report_capability "Netbios_ns Helper" $NETBIOS_NS_HELPER
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report_capability "H323 Helper" $H323_HELPER
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report_capability "PPTP Helper" $PPTP_HELPER
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report_capability "SANE Helper" $SANE_HELPER
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report_capability "SANE-0 Helper" $SANE0_HELPER
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report_capability "SIP Helper" $SIP_HELPER
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report_capability "SIP-0 Helper" $SIP0_HELPER
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report_capability "SNMP Helper" $SNMP_HELPER
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report_capability "TFTP Helper" $TFTP_HELPER
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report_capability "TFTP-0 Helper" $TFTP0_HELPER
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if [ $g_family -eq 4 ]; then
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report_capability "iptables -S (IPTABLES_S)" $IPTABLES_S
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@ -2514,13 +2530,19 @@ report_capabilities1() {
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report_capability1 NFACCT_MATCH
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report_capability1 AMANDA_HELPER
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report_capability1 FTP_HELPER
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report_capability1 FTP0_HELPER
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report_capability1 IRC_HELPER
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report_capability1 IRC0_HELPER
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report_capability1 NETBIOS_NS_HELPER
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report_capability1 H323_HELPER
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report_capability1 PPTP_HELPER
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report_capability1 SANE_HELPER
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report_capability1 SANE0_HELPER
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report_capability1 SIP_HELPER
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report_capability1 SIP0_HELPER
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report_capability1 SNMP_HELPER
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report_capability1 TFTP_HELPER
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report_capability1 TFTP0_HELPER
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echo CAPVERSION=$SHOREWALL_CAPVERSION
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echo KERNELVERSION=$KERNELVERSION
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@ -4359,7 +4359,7 @@ sub do_helper( $ ) {
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validate_helper( $helper );
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qq(-m helper --helper "$helper" ) if defined wantarray;
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qq(-m helper --helper "$helpers_aliases{$helper}" ) if defined wantarray;
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}
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@ -148,6 +148,7 @@ our %EXPORT_TAGS = ( internal => [ qw( create_temp_script
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%helpers
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%helpers_map
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%helpers_enabled
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%helpers_aliases
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@auditoptions
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@ -341,15 +342,20 @@ my %capdesc = ( NAT_ENABLED => 'NAT',
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NFACCT_MATCH => 'NFAcct Match',
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AMANDA_HELPER => 'Amanda Helper',
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FTP_HELPER => 'FTP Helper',
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FTP0_HELPER => 'FTP-0 Helper',
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H323_HELPER => 'H323 Helpers',
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IRC_HELPER => 'IRC Helper',
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IRC0_HELPER => 'IRC-0 Helper',
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NETBIOS_NS_HELPER =>
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'Netbios-ns Helper',
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PPTP_HELPER => 'PPTP Helper',
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SANE_HELPER => 'Amanda Helper',
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SANE_HELPER => 'SANE Helper',
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SANE0_HELPER => 'SANE-0 Helper',
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SIP_HELPER => 'SIP Helper',
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SIP0_HELPER => 'SIP-0 Helper',
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SNMP_HELPER => 'SNMP Helper',
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TFTP_HELPER => 'TFTP Helper',
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TFTP0_HELPER => 'TFTP-0 Helper',
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#
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# Constants
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#
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@ -382,21 +388,12 @@ our %helpers = ( amanda => UDP,
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tftp => UDP,
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);
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our %helpers_map = ( amanda => 'AMANDA_HELPER',
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ftp => 'FTP_HELPER',
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irc => 'IRC_HELPER',
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'netbios-ns' => 'NETBIOS_NS_HELPER',
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pptp => 'PPTP_HELPER',
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'Q.931' => 'H323_HELPER',
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RAS => 'H323_HELPER',
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sane => 'SANE_HELPER',
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sip => 'SIP_HELPER',
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snmp => 'SNMP_HELPER',
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tftp => 'TFTP_HELPER',
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);
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our %helpers_map;
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our %helpers_names;
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our %helpers_aliases;
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our %helpers_enabled;
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our %config_files = ( #accounting => 1,
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@ -852,14 +849,19 @@ sub initialize( $;$ ) {
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NFACCT_MATCH => undef,
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AMANDA_HELPER => undef,
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FTP_HELPER => undef,
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FTP0_HELPER => undef,
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H323_HELPER => undef,
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IRC_HELPER => undef,
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IRC0_HELPER => undef,
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NETBIOS_NS_HELPER => undef,
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PPTP_HELPER => undef,
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SANE_HELPER => undef,
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SANE0_HELPER => undef,
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SIP_HELPER => undef,
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SIP0_HELPER => undef,
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SNMP_HELPER => undef,
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TFTP_HELPER => undef,
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TFTP0_HELPER => undef,
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CAPVERSION => undef,
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LOG_OPTIONS => 1,
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@ -903,16 +905,48 @@ sub initialize( $;$ ) {
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%helpers_enabled = (
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amanda => 1,
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ftp => 1,
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'ftp-0' => 1,
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h323 => 1,
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irc => 1,
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'irc-0' => 1,
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'netbios-ns' => 1,
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pptp => 1,
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sane => 1,
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'sane-0' => 1,
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sip => 1,
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'sip-0' => 1,
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snmp => 1,
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tftp => 1,
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'tftp-0' => 1,
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);
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%helpers_map = ( amanda => 'AMANDA_HELPER',
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ftp => 'FTP_HELPER',
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irc => 'IRC_HELPER',
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'netbios-ns' => 'NETBIOS_NS_HELPER',
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pptp => 'PPTP_HELPER',
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'Q.931' => 'H323_HELPER',
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RAS => 'H323_HELPER',
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sane => 'SANE_HELPER',
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sip => 'SIP_HELPER',
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snmp => 'SNMP_HELPER',
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tftp => 'TFTP_HELPER',
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);
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%helpers_aliases = ( amanda => 'amanda',
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ftp => 'ftp',
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irc => 'irc',
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'netbios-ns' => 'netbios-ns',
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pptp => 'pptp',
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'Q.931' => 'Q.931',
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RAS => 'RAS',
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sane => 'sane',
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sip => 'sip',
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snmp => 'snmp',
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tftp => 'tftp',
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);
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process_shorewallrc( $shorewallrc ) if $shorewallrc;
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$globals{SHAREDIRPL} = "$shorewallrc{SHAREDIR}/shorewall/";
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@ -1819,7 +1853,12 @@ sub evaluate_expression( $$$ ) {
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my ( $first, $cap, $rest ) = ( $1, $3, $4);
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if ( exists $capdesc{$cap} ) {
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$val = have_capability( $cap )
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$val = have_capability( $cap );
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if ( defined $val ) {
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$val = "'$val'" unless $val =~ /^-?\d+$/;
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} else {
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$val = 0;
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}
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} elsif ( $cap =~ /^IPV([46])$/ ) {
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$val = ( $family == $1 );
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} else {
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@ -3233,12 +3272,12 @@ sub Helper_Match() {
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qt1( "$iptables -A $sillyname -p tcp --dport 21 -m helper --helper ftp" );
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}
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sub have_helper( $ ) {
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my $helper = $_[0];
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sub have_helper( $$$ ) {
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my ( $helper, $proto, $port ) = @_;
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if ( $helpers_enabled{$helper} ) {
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if ( have_capability 'CT_TARGET' ) {
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qt1( "$iptables -t raw -A $sillyname -p udp --dport 10080 -j CT --helper $helper" );
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qt1( "$iptables -t raw -A $sillyname -p $proto --dport $port -j CT --helper $helper" );
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} else {
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have_capability 'HELPER_MATCH';
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}
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@ -3246,43 +3285,63 @@ sub have_helper( $ ) {
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}
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sub Amanda_Helper() {
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have_helper 'amanda';
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have_helper( 'amanda', 'udp', 10080 );
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}
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sub FTP_Helper() {
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have_helper 'ftp';
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have_helper( 'ftp', 'tcp', 21 );
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}
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sub FTP0_Helper() {
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have_helper( 'ftp-0', 'tcp', 21 ) and $helpers_aliases{ftp} = 'ftp-0';
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}
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sub H323_Helpers() {
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have_helper 'RAS';
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have_helper( 'RAS', 'udp', 1719 );
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}
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sub IRC_Helper() {
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have_helper 'irc';
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have_helper( 'irc', 'tcp', 6667 );
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}
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sub IRC0_Helper() {
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have_helper( 'irc-0', 'tcp', 6667 ) and $helpers_aliases{irc} = 'irc-0';
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}
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sub Netbios_ns_Helper() {
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have_helper 'netbios-ns';
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have_helper( 'netbios-ns', 'udp', 137 );
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}
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sub PPTP_Helper() {
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have_helper 'pptp';
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have_helper( 'pptp', 'tcp', 1729 );
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}
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sub SANE_Helper() {
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have_helper 'sane';
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have_helper( 'sane', 'tcp', 6566 );
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}
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sub SANE0_Helper() {
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have_helper( 'sane-0', 'tcp', 6566 ) and $helpers_aliases{sane} = 'sane-0';
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}
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sub SIP_Helper() {
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have_helper 'sip';
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have_helper( 'sip', 'udp', 5060 );
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}
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sub SIP0_Helper() {
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have_helper( 'sip-0', 'udp', 5060 ) and $helpers_aliases{sip} = 'sip-0';
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}
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sub SNMP_Helper() {
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have_helper 'snmp';
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have_helper( 'snmp', 'udp', 161 );
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}
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sub TFTP_Helper() {
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have_helper 'tftp';
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have_helper( 'tftp', 'udp', 69 );
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}
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sub TFTP0_Helper() {
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have_helper( 'tftp-0', 'udp', 69 ) and $helpers_aliases{tftp} = 'tftp-0';
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}
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sub Connlimit_Match() {
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@ -3421,6 +3480,7 @@ our %detect_capability =
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EXMARK => \&Exmark,
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FLOW_FILTER => \&Flow_Filter,
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FTP_HELPER => \&FTP_Helper,
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FTP0_HELPER => \&FTP0_Helper,
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FWMARK_RT_MASK => \&Fwmark_Rt_Mask,
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GEOIP_MATCH => \&GeoIP_Match,
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GOTO_TARGET => \&Goto_Target,
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@ -3434,6 +3494,7 @@ our %detect_capability =
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IPRANGE_MATCH => \&IPRange_Match,
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IPSET_MATCH => \&IPSet_Match,
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IRC_HELPER => \&IRC_Helper,
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IRC0_HELPER => \&IRC0_Helper,
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OLD_IPSET_MATCH => \&Old_IPSet_Match,
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IPSET_V5 => \&IPSET_V5,
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IPTABLES_S => \&Iptables_S,
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@ -3469,11 +3530,14 @@ our %detect_capability =
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RECENT_MATCH => \&Recent_Match,
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RPFILTER_MATCH => \&RPFilter_Match,
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SANE_HELPER => \&SANE_Helper,
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SANE0_HELPER => \&SANE0_Helper,
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SIP_HELPER => \&SIP_Helper,
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SIP0_HELPER => \&SIP0_Helper,
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SNMP_HELPER => \&SNMP_Helper,
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STATISTIC_MATCH => \&Statistic_Match,
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TCPMSS_MATCH => \&Tcpmss_Match,
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TFTP_HELPER => \&TFTP_Helper,
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TFTP0_HELPER => \&TFTP0_Helper,
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TIME_MATCH => \&Time_Match,
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TPROXY_TARGET => \&Tproxy_Target,
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USEPKTTYPE => \&Usepkttype,
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@ -3529,6 +3593,17 @@ sub determine_capabilities() {
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$globals{KLUDGEFREE} = $capabilities{KLUDGEFREE} = detect_capability 'KLUDGEFREE';
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if ( have_capability 'CT_TARGET' ) {
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$capabilities{$_} = detect_capability $_ for ( values( %helpers_map ),
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'FTP0_HELPER',
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'IRC0_HELPER',
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'SANE0_HELPER',
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'SIP0_HELPER',
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'TFTP0_HELPER' );
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} else {
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$capabilities{HELPER_MATCH} = detect_capability 'HELPER_MATCH';
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}
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unless ( $config{ LOAD_HELPERS_ONLY } ) {
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#
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# Using 'detect_capability()' is a bit less efficient than calling the individual detection
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@ -3611,14 +3686,7 @@ sub determine_capabilities() {
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$capabilities{GEOIP_MATCH} = detect_capability( 'GEOIP_MATCH' );
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$capabilities{RPFILTER_MATCH} = detect_capability( 'RPFILTER_MATCH' );
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$capabilities{NFACCT_MATCH} = detect_capability( 'NFACCT_MATCH' );
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$capabilities{HELPER_MATCH} = detect_capability( 'HELPER_MATCH' );
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if ( $capabilities{CT_TARGET} ) {
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for ( values %helpers_map ) {
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$capabilities{$_} = detect_capability $_;
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}
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}
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qt1( "$iptables -F $sillyname" );
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qt1( "$iptables -X $sillyname" );
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qt1( "$iptables -F $sillyname1" );
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@ -3953,6 +4021,7 @@ sub read_capabilities() {
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}
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$globals{KLUDGEFREE} = $capabilities{KLUDGEFREE};
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}
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#
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@ -4241,6 +4310,14 @@ sub get_configuration( $$$ ) {
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get_capabilities( $export );
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report_capabilities unless $config{LOAD_HELPERS_ONLY};
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$helpers_aliases{ftp} = 'ftp-0', $capabilities{FTP_HELPER} = 1 if $capabilities{FTP0_HELPER};
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$helpers_aliases{irc} = 'irc-0', $capabilities{IRC_HELPER} = 1 if $capabilities{IRC0_HELPER};
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$helpers_aliases{sane} = 'sane-0', $capabilities{SANE_HELPER} = 1 if $capabilities{SANE0_HELPER};
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$helpers_aliases{sip} = 'sip-0', $capabilities{SIP_HELPER} = 1 if $capabilities{SIP0_HELPER};
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$helpers_aliases{tftp} = 'tftp-0', $capabilities{TFTP_HELPER} = 1 if $capabilities{TFTP0_HELPER};
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$globals{STATEMATCH} = '-m conntrack --ctstate' if have_capability 'CONNTRACK_MATCH';
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#
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@ -4716,8 +4793,6 @@ sub get_configuration( $$$ ) {
|
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$config{LOCKFILE} = '';
|
||||
}
|
||||
|
||||
report_capabilities unless $config{LOAD_HELPERS_ONLY};
|
||||
|
||||
require_capability( 'MULTIPORT' , "Shorewall $globals{VERSION}" , 's' );
|
||||
require_capability( 'RECENT_MATCH' , 'MACLIST_TTL' , 's' ) if $config{MACLIST_TTL};
|
||||
require_capability( 'XCONNMARK' , 'HIGH_ROUTE_MARKS=Yes' , 's' ) if $config{PROVIDER_OFFSET} > 0;
|
||||
|
||||
@ -84,7 +84,7 @@ sub process_notrack_rule( $$$$$$$ ) {
|
||||
|
||||
fatal_error "Invalid helper' ($args)" if $args =~ /,/;
|
||||
validate_helper( $args, $proto );
|
||||
$action = "CT --helper $args";
|
||||
$action = "CT --helper $helpers_aliases{$args}";
|
||||
$exception_rule = do_proto( $proto, '-', '-' );
|
||||
|
||||
for my $mod ( split_list1( $modifiers, 'ctevents' ) ) {
|
||||
|
||||
@ -336,6 +336,29 @@
|
||||
<para>tftp</para>
|
||||
</listitem>
|
||||
</itemizedlist>
|
||||
|
||||
<para>After disabling one or more helpers using this method, you
|
||||
must:</para>
|
||||
|
||||
<itemizedlist>
|
||||
<listitem>
|
||||
<para>Unload the related module(s).</para>
|
||||
</listitem>
|
||||
|
||||
<listitem>
|
||||
<para>Restart Shorewall (use the -c option (e.g., <command>shorewall
|
||||
restart -c</command>) if you have AUTOMAKE=Yes in <ulink
|
||||
url="manpages/shorewall.conf.html">shorewall.conf</ulink>
|
||||
(5))..</para>
|
||||
</listitem>
|
||||
</itemizedlist>
|
||||
|
||||
<para>Note that if you choose to reboot your system to unload the
|
||||
modules, then if you have CT:helper entries in <ulink
|
||||
url="manpages/shorewall-conntrack.html">shorewall-conntrack</ulink> (5)
|
||||
that refer to the module(s) and you have AUTOMAKE=Yes in <ulink
|
||||
url="manpages/shorewall.conf.html">shorewall.conf</ulink> (5), then
|
||||
Shorewall will fail to start at boot time.</para>
|
||||
</section>
|
||||
|
||||
<section>
|
||||
@ -353,5 +376,58 @@
|
||||
<para>In these files, Shorewall supports the same module names as
|
||||
iptables; see the table above.</para>
|
||||
</section>
|
||||
|
||||
<section>
|
||||
<title>Capabilities</title>
|
||||
|
||||
<para>The output of <command>shorewall show capabilities</command> has
|
||||
two entries for each of the helpers listed above that can be disabled by
|
||||
adding<emphasis role="bold"> ports=0</emphasis> in
|
||||
/etc/shorewall/helpers.</para>
|
||||
|
||||
<programlisting>shorewall show capabilities
|
||||
Amanda Helper: Available
|
||||
<emphasis role="bold">FTP Helper: Not available
|
||||
FTP-0 Helper: Available</emphasis>
|
||||
<emphasis role="bold"> IRC Helper: Not available
|
||||
IRC-0 Helper: Available
|
||||
</emphasis> Netbios_ns Helper: Available
|
||||
H323 Helper: Not available
|
||||
PPTP Helper: Available
|
||||
<emphasis role="bold"> SANE Helper: Not available
|
||||
SANE-0 Helper: Available
|
||||
</emphasis> SNMP Helper: Available
|
||||
<emphasis role="bold"> TFTP Helper: Not available
|
||||
TFTP-0 Helper: Available
|
||||
</emphasis> iptables -S (IPTABLES_S): Available
|
||||
Basic Filter (BASIC_FILTER): Available
|
||||
CT Target (CT_TARGET): Available
|
||||
Kernel Version (KERNELVERSION): 30404
|
||||
Capabilities Version (CAPVERSION): 40507
|
||||
|
||||
</programlisting>
|
||||
|
||||
<para>The above output is produced when this /etc/shorewall/helpers file
|
||||
is used on a system running kernel 3.4.4:</para>
|
||||
|
||||
<programlisting>loadmodule nf_conntrack_ftp ports=0
|
||||
loadmodule nf_conntrack_irc ports=0
|
||||
loadmodule nf_conntrack_netbios_ns
|
||||
loadmodule nf_conntrack_sip ports=0
|
||||
loadmodule nf_conntrack_tftp ports=0
|
||||
loadmodule nf_conntrack_sane ports=0</programlisting>
|
||||
|
||||
<para>The reason for the double capabilities is that when <emphasis
|
||||
role="bold">ports=0</emphasis> is specified, the iptables name of the
|
||||
helper gets '-0' added to it. So in order for the compiler to generate
|
||||
the correct iptables commands, it needs to know if <emphasis
|
||||
role="bold">ports=0</emphasis> was specified for each of the helprs that
|
||||
support it.</para>
|
||||
|
||||
<para>Notice that most of the other helpers are available, even though
|
||||
their modules were not loaded. That's because auto-loading occurs during
|
||||
capability detection on those modules whose iptables name matches the
|
||||
module name.</para>
|
||||
</section>
|
||||
</section>
|
||||
</article>
|
||||
|
||||
Loading…
Reference in New Issue
Block a user