Forward Firewall: added new files
[people/teissler/ipfire-2.x.git] / config / forwardfw / rules.pl
CommitLineData
2a81ab0d
AM
1#!/usr/bin/perl
2###############################################################################
3# #
4# IPFire.org - A linux based firewall #
5# Copyright (C) 2012 #
6# #
7# This program is free software: you can redistribute it and/or modify #
8# it under the terms of the GNU General Public License as published by #
9# the Free Software Foundation, either version 3 of the License, or #
10# (at your option) any later version. #
11# #
12# This program is distributed in the hope that it will be useful, #
13# but WITHOUT ANY WARRANTY; without even the implied warranty of #
14# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the #
15# GNU General Public License for more details. #
16# #
17# You should have received a copy of the GNU General Public License #
18# along with this program. If not, see <http://www.gnu.org/licenses/>. #
19# #
20###############################################################################
21# #
22# Hi folks! I hope this code is useful for all. I needed something to handle #
23# my VPN Connections in a comfortable way. #
24# This script builds firewallrules from the webinterface #
25###############################################################################
26
27
28use strict;
29no warnings 'uninitialized';
30
31# enable only the following on debugging purpose
32#use warnings;
33#use CGI::Carp 'fatalsToBrowser';
34
35my %fwdfwsettings=();
36my %defaultNetworks=();
37my %configfwdfw=();
38my %color=();
39my %icmptypes=();
40my %ovpnSettings=();
41my %customgrp=();
42our %sourcehash=();
43our %targethash=();
44my @timeframe=();
45my %configinputfw=();
46my %aliases=();
47my @DPROT=();
48require '/var/ipfire/general-functions.pl';
49require "${General::swroot}/lang.pl";
50require "${General::swroot}/forward/bin/firewall-lib.pl";
51
52my $configfwdfw = "${General::swroot}/forward/config";
53my $configinput = "${General::swroot}/forward/input";
54my $configgrp = "${General::swroot}/fwhosts/customgroups";
55my $errormessage='';
56my ($TYPE,$PROT,$SPROT,$DPROT,$SPORT,$DPORT,$TIME,$TIMEFROM,$TIMETILL,$SRC_TGT);
57my $CHAIN="FORWARDFW";
58
59
60&General::readhash("${General::swroot}/forward/settings", \%fwdfwsettings);
61&General::readhasharray($configfwdfw, \%configfwdfw);
62&General::readhasharray($configinput, \%configinputfw);
63&General::readhasharray($configgrp, \%customgrp);
64&General::get_aliases(\%aliases);
65
66################################
67# DEBUG/TEST #
68################################
69my $MODE=0; # 0 - normal operation
70 # 1 - print configline and rules to console
71 #
72################################
73my $param=shift;
74
75if($param eq 'flush'){
76 if ($MODE eq '1'){
77 print " Flushing chains...\n";
78 }
79 &flush;
80}else{
81 if ($MODE eq '1'){
82 print " Flushing chains...\n";
83 }
84 &flush;
85 if ($MODE eq '1'){
86 print " Preparing rules...\n";
87 }
88 &preparerules;
89 if($MODE eq '0'){
90 if ($fwdfwsettings{'POLICY'} eq 'MODE1'){
91 system ("iptables -A $CHAIN -j DROP");
92 }elsif($fwdfwsettings{'POLICY'} eq 'MODE2'){
93 system ("iptables -A $CHAIN -j ACCEPT");
94 }
95 }
96}
97
98sub flush
99{
100 system ("iptables -F FORWARDFW");
101 system ("iptables -F INPUTFW");
102}
103sub preparerules
104{
105 if (! -z "${General::swroot}/forward/config"){
106 &buildrules(\%configfwdfw);
107 }
108 if (! -z "${General::swroot}/forward/input"){
109 &buildrules(\%configinputfw);
110 }
111}
112sub buildrules
113{
114 my $hash=shift;
115 foreach my $key (sort keys %$hash){
116 if($$hash{$key}[2] eq 'ON'){
117 #get source ip's
118 if ($$hash{$key}[3] eq 'cust_grp_src'){
119 foreach my $grp (sort keys %customgrp){
120 if($customgrp{$grp}[0] eq $$hash{$key}[4]){
121 &get_address($customgrp{$grp}[3],$customgrp{$grp}[2],"src");
122 }
123 }
124 }else{
125 &get_address($$hash{$key}[3],$$hash{$key}[4],"src");
126 }
127 #get target ip's
128 if ($$hash{$key}[5] eq 'cust_grp_tgt'){
129 foreach my $grp (sort keys %customgrp){
130 if($customgrp{$grp}[0] eq $$hash{$key}[6]){
131 &get_address($customgrp{$grp}[3],$customgrp{$grp}[2],"tgt");
132 }
133 }
134 }elsif($$hash{$key}[5] eq 'ipfire'){
135
136 if($$hash{$key}[6] eq 'Default IP'){
137 open(FILE, "/var/ipfire/red/local-ipaddress") or die 'Unable to open config file.';
138 $targethash{$key}[0]= <FILE>;
139 close(FILE);
140 }else{
141 foreach my $alias (sort keys %aliases){
142 if ($$hash{$key}[6] eq $alias){
143 $targethash{$key}[0]=$aliases{$alias}{'IPT'};
144 }
145 }
146 }
147 }else{
148 &get_address($$hash{$key}[5],$$hash{$key}[6],"tgt");
149 }
150
151 ##get source prot and port
152 $SRC_TGT='SRC';
153 $SPROT = &get_prot($hash,$key);
154 $SPORT = &get_port($hash,$key);
155 $SRC_TGT='';
156
157 ##get target prot and port
158 $DPROT=&get_prot($hash,$key);
159
160 if ($DPROT eq ''){$DPROT=' ';}
161 @DPROT=split(",",$DPROT);
162
163
164 #get time if defined
165 if($$hash{$key}[18] eq 'ON'){
166 if($$hash{$key}[19] ne ''){push (@timeframe,"Mon");}
167 if($$hash{$key}[20] ne ''){push (@timeframe,"Tue");}
168 if($$hash{$key}[21] ne ''){push (@timeframe,"Wed");}
169 if($$hash{$key}[22] ne ''){push (@timeframe,"Thu");}
170 if($$hash{$key}[23] ne ''){push (@timeframe,"Fri");}
171 if($$hash{$key}[24] ne ''){push (@timeframe,"Sat");}
172 if($$hash{$key}[25] ne ''){push (@timeframe,"Sun");}
173 $TIME=join(",",@timeframe);
174 $TIMEFROM="--timestart $$hash{$key}[26] ";
175 $TIMETILL="--timestop $$hash{$key}[27] ";
176 $TIME="-m time --weekdays $TIME $TIMEFROM $TIMETILL";
177 }
178
179 if ($MODE eq '1'){
180 print "NR:$key ";
181 foreach my $i (0 .. $#{$$hash{$key}}){
182 print "$i: $$hash{$key}[$i] ";
183 }
184 print "\n";
185 print"##################################\n";
186 #print rules to console
187
188 foreach my $DPROT (@DPROT){
189 $DPORT = &get_port($hash,$key,$DPROT);
190 if ($SPROT ne ''){$PROT=$SPROT;}else{$PROT=$DPROT;}
191 $PROT="-p $PROT" if ($PROT ne '' && $PROT ne ' ');
192 foreach my $a (sort keys %sourcehash){
193 foreach my $b (sort keys %targethash){
194 if ($sourcehash{$a}[0] ne $targethash{$b}[0] && $targethash{$b}[0] ne 'none'){
195 if($SPROT eq '' || $SPROT eq $DPROT || $DPROT eq ' '){
196 if ($$hash{$key}[17] eq 'ON'){
197 print "iptables -A $$hash{$key}[1] $PROT -s $sourcehash{$a}[0] $SPORT -d $targethash{$b}[0] $DPORT $TIME -j LOG\n";
198 }
199 print "iptables -A $$hash{$key}[1] $PROT -s $sourcehash{$a}[0] $SPORT -d $targethash{$b}[0] $DPORT $TIME -j $$hash{$key}[0]\n";
200 }
201 }
202 }
203 }
204 print"\n";
205 }
206
207 }elsif($MODE eq '0'){
208 foreach my $DPROT (@DPROT){
209 $DPORT = &get_port($hash,$key,$DPROT);
210 if ($SPROT ne ''){$PROT=$SPROT;}else{$PROT=$DPROT;}
211 $PROT="-p $PROT" if ($PROT ne '' && $PROT ne ' ');
212 foreach my $a (sort keys %sourcehash){
213 foreach my $b (sort keys %targethash){
214 if ($sourcehash{$a}[0] ne $targethash{$b}[0] && $targethash{$b}[0] ne 'none'){
215 if($SPROT eq '' || $SPROT eq $DPROT || $DPROT eq ' '){
216 if ($$hash{$key}[17] eq 'ON'){
217 system ("iptables -A $$hash{$key}[1] $PROT -s $sourcehash{$a}[0] $SPORT -d $targethash{$b}[0] $DPORT $TIME -j LOG");
218 }
219 system ("iptables -A $$hash{$key}[1] $PROT -s $sourcehash{$a}[0] $SPORT -d $targethash{$b}[0] $DPORT $TIME -j $$hash{$key}[0]");
220 }
221 }
222 }
223 }
224 print"\n";
225 }
226 }
227 }
228 %sourcehash=();
229 %targethash=();
230 undef $TIME;
231 undef $TIMEFROM;
232 undef $TIMETILL;
233 }
234}
235sub get_address
236{
237 my $base=shift; #source of checking ($configfwdfw{$key}[x] or groupkey
238 my $base2=shift;
239 my $type=shift; #src or tgt
240 my $hash;
241 if ($type eq 'src'){
242 $hash=\%sourcehash;
243 }else{
244 $hash=\%targethash;
245 }
246 my $key = &General::findhasharraykey($hash);
247 if($base eq 'src_addr' || $base eq 'tgt_addr' ){
248 $$hash{$key}[0] = $configfwdfw{$key}[4];
249 }elsif($base eq 'std_net_src' || $base eq 'std_net_tgt' || $base eq 'Standard Network'){
250 $$hash{$key}[0]=&fwlib::get_std_net_ip($base2);
251 }elsif($base eq 'cust_net_src' || $base eq 'cust_net_tgt' || $base eq 'Custom Network'){
252 $$hash{$key}[0]=&fwlib::get_net_ip($base2);
253 }elsif($base eq 'cust_host_src' || $base eq 'cust_host_tgt' || $base eq 'Custom Host'){
254 $$hash{$key}[0]=&fwlib::get_host_ip($base2,$type);
255 }elsif($base eq 'ovpn_net_src' || $base eq 'ovpn_net_tgt' || $base eq 'OpenVPN static network'){
256 $$hash{$key}[0]=&fwlib::get_ovpn_net_ip($base2,1);
257 }elsif($base eq 'ovpn_host_src' ||$base eq 'ovpn_host_tgt' || $base eq 'OpenVPN static host'){
258 $$hash{$key}[0]=&fwlib::get_ovpn_host_ip($base2,33);
259 }elsif($base eq 'ovpn_n2n_src' ||$base eq 'ovpn_n2n_tgt' || $base eq 'OpenVPN N-2-N'){
260 $$hash{$key}[0]=&fwlib::get_ovpn_n2n_ip($base2,27);
261 }elsif($base eq 'ipsec_net_src' || $base eq 'ipsec_net_tgt' || $base eq 'IpSec Network'){
262 $$hash{$key}[0]=&fwlib::get_ipsec_net_ip($base2,11);
263 }
264}
265sub get_prot
266{
267 my $hash=shift;
268 my $key=shift;
269 if ($$hash{$key}[7] eq 'ON' && $SRC_TGT eq 'SRC'){
270 if ($$hash{$key}[10] ne ''){
271 return"$$hash{$key}[8]";
272 }elsif($$hash{$key}[9] ne ''){
273 return"$$hash{$key}[8]";
274 }else{
275 return "$$hash{$key}[8]";
276 }
277 }elsif($$hash{$key}[11] eq 'ON' && $SRC_TGT eq ''){
278 if ($$hash{$key}[14] eq 'TGT_PORT'){
279 if ($$hash{$key}[15] ne ''){
280 return "$$hash{$key}[12]";
281 }elsif($$hash{$key}[13] ne ''){
282 return "$$hash{$key}[12]";
283 }else{
284 return "$$hash{$key}[12]";
285 }
286 }elsif($$hash{$key}[14] eq 'cust_srv'){
287 return &fwlib::get_srv_prot($$hash{$key}[15]);
288
289 }elsif($$hash{$key}[14] eq 'cust_srvgrp'){
290 return &fwlib::get_srvgrp_prot($$hash{$key}[15]);
291 }
292 }
293}
294sub get_port
295{
296 my $hash=shift;
297 my $key=shift;
298 my $prot=shift;
299 if ($$hash{$key}[7] eq 'ON' && $SRC_TGT eq 'SRC'){
300 if ($$hash{$key}[10] ne ''){
301 return "--sport $$hash{$key}[10] ";
302 }elsif($$hash{$key}[9] ne ''){
303 return "--icmp-type $$hash{$key}[9] ";
304 }
305 }elsif($$hash{$key}[11] eq 'ON' && $SRC_TGT eq ''){
306
307 if($$hash{$key}[14] eq 'TGT_PORT'){
308 if ($$hash{$key}[15] ne ''){
309 return "--dport $$hash{$key}[15] ";
310 }elsif($$hash{$key}[13] ne '' && $$hash{$key}[13] ne 'All ICMP-Types'){
311 return "--icmp-type $$hash{$key}[13] ";
312 }elsif($$hash{$key}[13] ne '' && $$hash{$key}[13] eq 'All ICMP-Types'){
313 return;
314 }
315 }elsif($$hash{$key}[14] eq 'cust_srv'){
316 if ($prot ne 'ICMP'){
317 return "--dport ".&fwlib::get_srv_port($$hash{$key}[15],1,$prot);
318 }elsif($prot eq 'ICMP' && $$hash{$key}[15] ne 'All ICMP-Types'){
319 return "--icmp-type ".&fwlib::get_srv_port($$hash{$key}[15],3,$prot);
320 }elsif($prot eq 'ICMP' && $$hash{$key}[15] eq 'All ICMP-Types'){
321 return;
322 }
323 }elsif($$hash{$key}[14] eq 'cust_srvgrp'){
324 if ($prot ne 'ICMP'){
325 return &fwlib::get_srvgrp_port($$hash{$key}[15],$prot);
326 }
327 elsif($prot eq 'ICMP'){
328 return &fwlib::get_srvgrp_port($$hash{$key}[15],$prot);
329 }
330
331
332 }
333 }
334}