8c9e2ba523d95e81dbe1f4abdb19c2bcf237efb6
[people/teissler/ipfire-2.x.git] / config / forwardfw / rules.pl
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
28 use strict;
29 no warnings 'uninitialized';
30
31 # enable only the following on debugging purpose
32 #use warnings;
33 #use CGI::Carp 'fatalsToBrowser';
34
35 my %fwdfwsettings=();
36 my %defaultNetworks=();
37 my %configfwdfw=();
38 my %color=();
39 my %icmptypes=();
40 my %ovpnSettings=();
41 my %customgrp=();
42 our %sourcehash=();
43 our %targethash=();
44 my @timeframe=();
45 my %configinputfw=();
46 my %aliases=();
47 my @DPROT=();
48 require '/var/ipfire/general-functions.pl';
49 require "${General::swroot}/lang.pl";
50 require "${General::swroot}/forward/bin/firewall-lib.pl";
51
52 my $configfwdfw = "${General::swroot}/forward/config";
53 my $configinput = "${General::swroot}/forward/input";
54 my $configgrp = "${General::swroot}/fwhosts/customgroups";
55 my $errormessage='';
56 my ($TYPE,$PROT,$SPROT,$DPROT,$SPORT,$DPORT,$TIME,$TIMEFROM,$TIMETILL,$SRC_TGT);
57 my $CHAIN="FORWARDFW";
58
59
60 &General::readhash("${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 ################################
69 my $MODE=0; # 0 - normal operation
70 # 1 - print configline and rules to console
71 #
72 ################################
73 my $param=shift;
74
75 if($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 $CHAIN -j ACCEPT");
94 }
95 }
96 }
97
98 sub flush
99 {
100 system ("iptables -F FORWARDFW");
101 system ("iptables -F INPUTFW");
102 }
103 sub preparerules
104 {
105 if (! -z "${General::swroot}/forward/config"){
106 &buildrules(\%configfwdfw);
107 }
108 if (! -z "${General::swroot}/forward/input"){
109 &buildrules(\%configinputfw);
110 }
111 }
112 sub buildrules
113 {
114
115 my $hash=shift;
116
117 foreach my $key (sort keys %$hash){
118 if($$hash{$key}[2] eq 'ON'){
119 #get source ip's
120 if ($$hash{$key}[3] eq 'cust_grp_src'){
121 foreach my $grp (sort keys %customgrp){
122 if($customgrp{$grp}[0] eq $$hash{$key}[4]){
123 &get_address($customgrp{$grp}[3],$customgrp{$grp}[2],"src");
124 }
125 }
126 }else{
127 &get_address($$hash{$key}[3],$$hash{$key}[4],"src");
128 }
129 #get target ip's
130 if ($$hash{$key}[5] eq 'cust_grp_tgt'){
131 foreach my $grp (sort keys %customgrp){
132 if($customgrp{$grp}[0] eq $$hash{$key}[6]){
133 &get_address($customgrp{$grp}[3],$customgrp{$grp}[2],"tgt");
134 }
135 }
136 }elsif($$hash{$key}[5] eq 'ipfire'){
137
138 if($$hash{$key}[6] eq 'Default IP'){
139 open(FILE, "/var/ipfire/red/local-ipaddress") or die 'Unable to open config file.';
140 $targethash{$key}[0]= <FILE>;
141 close(FILE);
142 }else{
143 foreach my $alias (sort keys %aliases){
144 if ($$hash{$key}[6] eq $alias){
145 $targethash{$key}[0]=$aliases{$alias}{'IPT'};
146 }
147 }
148 }
149 }else{
150 &get_address($$hash{$key}[5],$$hash{$key}[6],"tgt");
151 }
152 ##get source prot and port
153 $SRC_TGT='SRC';
154 $SPROT = &get_prot($hash,$key);
155 $SPORT = &get_port($hash,$key);
156 $SRC_TGT='';
157
158 ##get target prot and port
159 $DPROT=&get_prot($hash,$key);
160
161 if ($DPROT eq ''){$DPROT=' ';}
162 @DPROT=split(",",$DPROT);
163
164
165 #get time if defined
166 if($$hash{$key}[18] eq 'ON'){
167 if($$hash{$key}[19] ne ''){push (@timeframe,"Mon");}
168 if($$hash{$key}[20] ne ''){push (@timeframe,"Tue");}
169 if($$hash{$key}[21] ne ''){push (@timeframe,"Wed");}
170 if($$hash{$key}[22] ne ''){push (@timeframe,"Thu");}
171 if($$hash{$key}[23] ne ''){push (@timeframe,"Fri");}
172 if($$hash{$key}[24] ne ''){push (@timeframe,"Sat");}
173 if($$hash{$key}[25] ne ''){push (@timeframe,"Sun");}
174 $TIME=join(",",@timeframe);
175 $TIMEFROM="--timestart $$hash{$key}[26] ";
176 $TIMETILL="--timestop $$hash{$key}[27] ";
177 $TIME="-m time --weekdays $TIME $TIMEFROM $TIMETILL";
178 }
179
180 if ($MODE eq '1'){
181 print "NR:$key ";
182 foreach my $i (0 .. $#{$$hash{$key}}){
183 print "$i: $$hash{$key}[$i] ";
184 }
185 print "\n";
186 print"##################################\n";
187 #print rules to console
188
189 foreach my $DPROT (@DPROT){
190 $DPORT = &get_port($hash,$key,$DPROT);
191 if ($SPROT ne ''){$PROT=$SPROT;}else{$PROT=$DPROT;}
192 $PROT="-p $PROT" if ($PROT ne '' && $PROT ne ' ');
193 foreach my $a (sort keys %sourcehash){
194 foreach my $b (sort keys %targethash){
195 if ($sourcehash{$a}[0] ne $targethash{$b}[0] && $targethash{$b}[0] ne 'none'){
196 if($SPROT eq '' || $SPROT eq $DPROT || $DPROT eq ' '){
197 if ($$hash{$key}[17] eq 'ON'){
198 print "iptables -A $$hash{$key}[1] $PROT -s $sourcehash{$a}[0] $SPORT -d $targethash{$b}[0] $DPORT $TIME -j LOG\n";
199 }
200 print "iptables -A $$hash{$key}[1] $PROT -s $sourcehash{$a}[0] $SPORT -d $targethash{$b}[0] $DPORT $TIME -j $$hash{$key}[0]\n";
201 }
202 }
203 }
204 }
205 print"\n";
206 }
207
208 }elsif($MODE eq '0'){
209 foreach my $DPROT (@DPROT){
210 $DPORT = &get_port($hash,$key,$DPROT);
211 if ($SPROT ne ''){$PROT=$SPROT;}else{$PROT=$DPROT;}
212 $PROT="-p $PROT" if ($PROT ne '' && $PROT ne ' ');
213 foreach my $a (sort keys %sourcehash){
214 foreach my $b (sort keys %targethash){
215 if ($sourcehash{$a}[0] ne $targethash{$b}[0] && $targethash{$b}[0] ne 'none'){
216 if($SPROT eq '' || $SPROT eq $DPROT || $DPROT eq ' '){
217 if ($$hash{$key}[17] eq 'ON'){
218 system ("iptables -A $$hash{$key}[1] $PROT -s $sourcehash{$a}[0] $SPORT -d $targethash{$b}[0] $DPORT $TIME -j LOG");
219 }
220 system ("iptables -A $$hash{$key}[1] $PROT -s $sourcehash{$a}[0] $SPORT -d $targethash{$b}[0] $DPORT $TIME -j $$hash{$key}[0]");
221 }
222 }
223 }
224 }
225 print"\n";
226 }
227 }
228 }
229 %sourcehash=();
230 %targethash=();
231 undef $TIME;
232 undef $TIMEFROM;
233 undef $TIMETILL;
234 }
235 }
236 sub get_address
237 {
238 my $base=shift; #source of checking ($configfwdfw{$key}[x] or groupkey
239 my $base2=shift;
240 my $type=shift; #src or tgt
241 my $hash;
242 if ($type eq 'src'){
243 $hash=\%sourcehash;
244 }else{
245 $hash=\%targethash;
246 }
247 my $key = &General::findhasharraykey($hash);
248 if($base eq 'src_addr' || $base eq 'tgt_addr' ){
249 $$hash{$key}[0] = $base2;
250 }elsif($base eq 'std_net_src' || $base eq 'std_net_tgt' || $base eq 'Standard Network'){
251 $$hash{$key}[0]=&fwlib::get_std_net_ip($base2);
252 }elsif($base eq 'cust_net_src' || $base eq 'cust_net_tgt' || $base eq 'Custom Network'){
253 $$hash{$key}[0]=&fwlib::get_net_ip($base2);
254 }elsif($base eq 'cust_host_src' || $base eq 'cust_host_tgt' || $base eq 'Custom Host'){
255 $$hash{$key}[0]=&fwlib::get_host_ip($base2,$type);
256 }elsif($base eq 'ovpn_net_src' || $base eq 'ovpn_net_tgt' || $base eq 'OpenVPN static network'){
257 $$hash{$key}[0]=&fwlib::get_ovpn_net_ip($base2,1);
258 }elsif($base eq 'ovpn_host_src' ||$base eq 'ovpn_host_tgt' || $base eq 'OpenVPN static host'){
259 $$hash{$key}[0]=&fwlib::get_ovpn_host_ip($base2,33);
260 }elsif($base eq 'ovpn_n2n_src' ||$base eq 'ovpn_n2n_tgt' || $base eq 'OpenVPN N-2-N'){
261 $$hash{$key}[0]=&fwlib::get_ovpn_n2n_ip($base2,27);
262 }elsif($base eq 'ipsec_net_src' || $base eq 'ipsec_net_tgt' || $base eq 'IpSec Network'){
263 $$hash{$key}[0]=&fwlib::get_ipsec_net_ip($base2,11);
264 }
265 }
266 sub get_prot
267 {
268 my $hash=shift;
269 my $key=shift;
270 if ($$hash{$key}[7] eq 'ON' && $SRC_TGT eq 'SRC'){
271 if ($$hash{$key}[10] ne ''){
272 return"$$hash{$key}[8]";
273 }elsif($$hash{$key}[9] ne ''){
274 return"$$hash{$key}[8]";
275 }else{
276 return "$$hash{$key}[8]";
277 }
278 }elsif($$hash{$key}[11] eq 'ON' && $SRC_TGT eq ''){
279 if ($$hash{$key}[14] eq 'TGT_PORT'){
280 if ($$hash{$key}[15] ne ''){
281 return "$$hash{$key}[12]";
282 }elsif($$hash{$key}[13] ne ''){
283 return "$$hash{$key}[12]";
284 }else{
285 return "$$hash{$key}[12]";
286 }
287 }elsif($$hash{$key}[14] eq 'cust_srv'){
288 return &fwlib::get_srv_prot($$hash{$key}[15]);
289
290 }elsif($$hash{$key}[14] eq 'cust_srvgrp'){
291 return &fwlib::get_srvgrp_prot($$hash{$key}[15]);
292 }
293 }
294 }
295 sub get_port
296 {
297 my $hash=shift;
298 my $key=shift;
299 my $prot=shift;
300 if ($$hash{$key}[7] eq 'ON' && $SRC_TGT eq 'SRC'){
301 if ($$hash{$key}[10] ne ''){
302 return "--sport $$hash{$key}[10] ";
303 }elsif($$hash{$key}[9] ne ''){
304 return "--icmp-type $$hash{$key}[9] ";
305 }
306 }elsif($$hash{$key}[11] eq 'ON' && $SRC_TGT eq ''){
307
308 if($$hash{$key}[14] eq 'TGT_PORT'){
309 if ($$hash{$key}[15] ne ''){
310 return "--dport $$hash{$key}[15] ";
311 }elsif($$hash{$key}[13] ne '' && $$hash{$key}[13] ne 'All ICMP-Types'){
312 return "--icmp-type $$hash{$key}[13] ";
313 }elsif($$hash{$key}[13] ne '' && $$hash{$key}[13] eq 'All ICMP-Types'){
314 return;
315 }
316 }elsif($$hash{$key}[14] eq 'cust_srv'){
317 if ($prot ne 'ICMP'){
318 return "--dport ".&fwlib::get_srv_port($$hash{$key}[15],1,$prot);
319 }elsif($prot eq 'ICMP' && $$hash{$key}[15] ne 'All ICMP-Types'){
320 return "--icmp-type ".&fwlib::get_srv_port($$hash{$key}[15],3,$prot);
321 }elsif($prot eq 'ICMP' && $$hash{$key}[15] eq 'All ICMP-Types'){
322 return;
323 }
324 }elsif($$hash{$key}[14] eq 'cust_srvgrp'){
325 if ($prot ne 'ICMP'){
326 return &fwlib::get_srvgrp_port($$hash{$key}[15],$prot);
327 }
328 elsif($prot eq 'ICMP'){
329 return &fwlib::get_srvgrp_port($$hash{$key}[15],$prot);
330 }
331
332
333 }
334 }
335 }