]> git.ipfire.org Git - people/teissler/ipfire-2.x.git/blobdiff - config/firewall/firewall-lib.pl
Firewall: DNAT - Show right DNAT interface in ruletable
[people/teissler/ipfire-2.x.git] / config / firewall / firewall-lib.pl
index fc80555079a5d93b7234d9c072599b90c994f1ad..a82fc90b4684358f8439127b493e76aad4af1ce1 100755 (executable)
@@ -35,6 +35,8 @@ my %ipsecconf=();
 my %ipsecsettings=();
 my %netsettings=();
 my %ovpnsettings=();
+my %defaultNetworks=();
+my %aliases=();
 
 require '/var/ipfire/general-functions.pl';
 
@@ -49,11 +51,12 @@ my $configipsec             = "${General::swroot}/vpn/config";
 my $configovpn         = "${General::swroot}/ovpn/settings";
 my $val;
 my $field;
+my $netsettings                = "${General::swroot}/ethernet/settings";
 
 &General::readhash("/var/ipfire/ethernet/settings", \%netsettings);
 &General::readhash("${General::swroot}/ovpn/settings", \%ovpnsettings);
 &General::readhash("${General::swroot}/vpn/settings", \%ipsecsettings);
-
+&General::readhash("$netsettings", \%defaultNetworks);
 
 &General::readhasharray("$confignet", \%customnetwork);
 &General::readhasharray("$confighost", \%customhost);
@@ -103,8 +106,6 @@ sub get_srvgrp_prot
        return $back;
        
 }
-
-
 sub get_srv_port
 {
        my $val=shift;
@@ -253,5 +254,276 @@ sub get_host_ip
                }  
        }
 }
+sub get_addresses
+{
+       my $hash = shift;
+       my $key  = shift;
+       my $type = shift;
+
+       my @addresses = ();
+       my $addr_type;
+       my $value;
+       my $group_name;
+
+       if ($type eq "src") {
+               $addr_type = $$hash{$key}[3];
+               $value = $$hash{$key}[4];
+
+       } elsif ($type eq "tgt") {
+               $addr_type = $$hash{$key}[5];
+               $value = $$hash{$key}[6];
+       }
+
+       if ($addr_type ~~ ["cust_grp_src", "cust_grp_tgt"]) {
+               foreach my $grp (sort {$a <=> $b} keys %customgrp) {
+                       if ($customgrp{$grp}[0] eq $value) {
+                               my @address = &get_address($customgrp{$grp}[3], $customgrp{$grp}[2], $type);
+
+                               if (@address) {
+                                       push(@addresses, @address);
+                               }
+                       }
+               }
+       } else {
+               my @address = &get_address($addr_type, $value, $type);
+
+               if (@address) {
+                       push(@addresses, @address);
+               }
+       }
+
+       return @addresses;
+}
+sub get_address
+{
+       my $key   = shift;
+       my $value = shift;
+       my $type  = shift;
+
+       my @ret = ();
+
+       # If the user manually typed an address, we just check if it is a MAC
+       # address. Otherwise, we assume that it is an IP address.
+       if ($key ~~ ["src_addr", "tgt_addr"]) {
+               if (&General::validmac($value)) {
+                       push(@ret, "-m mac --mac-source $value");
+               } else {
+                       push(@ret, $value);
+               }
+
+       # If a default network interface (GREEN, BLUE, etc.) is selected, we
+       # try to get the corresponding address of the network.
+       } elsif ($key ~~ ["std_net_src", "std_net_tgt", "Standard Network"]) {
+               my $external_interface = &get_external_interface();
+
+               my $network_address = &get_std_net_ip($value, $external_interface);
+               if ($network_address) {
+                       push(@ret, $network_address);
+               }
+
+       # Custom networks.
+       } elsif ($key ~~ ["cust_net_src", "cust_net_tgt", "Custom Network"]) {
+               my $network_address = &get_net_ip($value);
+               if ($network_address) {
+                       push(@ret, $network_address);
+               }
+
+       # Custom hosts.
+       } elsif ($key ~~ ["cust_host_src", "cust_host_tgt", "Custom Host"]) {
+               my $host_address = &get_host_ip($value, $type);
+               if ($host_address) {
+                       push(@ret, $host_address);
+               }
+
+       # OpenVPN networks.
+       } elsif ($key ~~ ["ovpn_net_src", "ovpn_net_tgt", "OpenVPN static network"]) {
+               my $network_address = &get_ovpn_net_ip($value, 1);
+               if ($network_address) {
+                       push(@ret, $network_address);
+               }
+
+       # OpenVPN hosts.
+       } elsif ($key ~~ ["ovpn_host_src", "ovpn_host_tgt", "OpenVPN static host"]) {
+               my $host_address = &get_ovpn_host_ip($value, 33);
+               if ($host_address) {
+                       push(@ret, $host_address);
+               }
+
+       # OpenVPN N2N.
+       } elsif ($key ~~ ["ovpn_n2n_src", "ovpn_n2n_tgt", "OpenVPN N-2-N"]) {
+               my $network_address = &get_ovpn_n2n_ip($value, 11);
+               if ($network_address) {
+                       push(@ret, $network_address);
+               }
+
+       # IPsec networks.
+       } elsif ($key ~~ ["ipsec_net_src", "ipsec_net_tgt", "IpSec Network"]) {
+               my $network_address = &get_ipsec_net_ip($value, 11);
+               if ($network_address) {
+                       push(@ret, $network_address);
+               }
+
+       # The firewall's own IP addresses.
+       } elsif ($key ~~ ["ipfire", "ipfire_src"]) {
+               # ALL
+               if ($value eq "ALL") {
+                       push(@ret, "0/0");
+
+               # GREEN
+               } elsif ($value eq "GREEN") {
+                       push(@ret, $defaultNetworks{"GREEN_ADDRESS"});
+
+               # BLUE
+               } elsif ($value eq "BLUE") {
+                       push(@ret, $defaultNetworks{"BLUE_ADDRESS"});
+
+               # ORANGE
+               } elsif ($value eq "ORANGE") {
+                       push(@ret, $defaultNetworks{"ORANGE_ADDRESS"});
+
+               # RED
+               } elsif ($value ~~ ["RED", "RED1"]) {
+                       my $address = &get_external_address();
+                       if ($address) {
+                               push(@ret, $address);
+                       }
+
+               # Aliases
+               } else {
+                       my %alias = &get_alias($value);
+                       if (%alias) {
+                               push(@ret, $alias{"IPT"});
+                       }
+               }
+
+       # If nothing was selected, we assume "any".
+       } else {
+               push(@ret, "0/0");
+       }
+
+       return @ret;
+}
+sub get_external_interface()
+{
+       open(IFACE, "/var/ipfire/red/iface") or return "";
+       my $iface = <IFACE>;
+       close(IFACE);
+
+       return $iface;
+}
+sub get_external_address()
+{
+       open(ADDR, "/var/ipfire/red/local-ipaddress") or return "";
+       my $address = <ADDR>;
+       close(ADDR);
+
+       return $address;
+}
+sub get_alias
+{
+       my $id = shift;
+
+       foreach my $alias (sort keys %aliases) {
+               if ($id eq $alias) {
+                       return $aliases{$alias};
+               }
+       }
+}
+sub get_nat_address
+{
+       my $zone = shift;
+       my $source = shift;
+
+       # Any static address of any zone.
+       if ($zone eq "AUTO") {
+               if ($source && ($source !~ m/mac/i )) {
+                       my $firewall_ip = &get_internal_firewall_ip_address($source, 1);
+                       if ($firewall_ip) {
+                               return $firewall_ip;
+                       }
+
+                       $firewall_ip = &get_matching_firewall_address($source, 1);
+                       if ($firewall_ip) {
+                               return $firewall_ip;
+                       }
+               }
+
+               return &get_external_address();
+
+       } elsif ($zone eq "RED" || $zone eq "GREEN" || $zone eq "ORANGE" || $zone eq "BLUE") {
+               return $defaultNetworks{$zone . "_ADDRESS"};
+
+       } elsif ($zone eq "Default IP") {
+               return &get_external_address();
+
+       } else {
+               return &get_alias($zone);
+       }
+
+       print_error("Could not find NAT address");
+}
+sub get_internal_firewall_ip_addresses
+{
+       my $use_orange = shift;
+
+       my @zones = ("GREEN", "BLUE");
+       if ($use_orange) {
+               push(@zones, "ORANGE");
+       }
+
+       my @addresses = ();
+       for my $zone (@zones) {
+               next unless (exists $defaultNetworks{$zone . "_ADDRESS"});
+
+               my $zone_address = $defaultNetworks{$zone . "_ADDRESS"};
+               push(@addresses, $zone_address);
+       }
+
+       return @addresses;
+}
+sub get_matching_firewall_address
+{
+       my $addr = shift;
+       my $use_orange = shift;
+
+       my ($address, $netmask) = split("/", $addr);
+
+       my @zones = ("GREEN", "BLUE");
+       if ($use_orange) {
+               push(@zones, "ORANGE");
+       }
+
+       foreach my $zone (@zones) {
+               next unless (exists $defaultNetworks{$zone . "_ADDRESS"});
+
+               my $zone_subnet = $defaultNetworks{$zone . "_NETADDRESS"};
+               my $zone_mask   = $defaultNetworks{$zone . "_NETMASK"};
+
+               if (&General::IpInSubnet($address, $zone_subnet, $zone_mask)) {
+                       return $defaultNetworks{$zone . "_ADDRESS"};
+               }
+       }
+
+       return 0;
+}
+sub get_internal_firewall_ip_address
+{
+       my $subnet = shift;
+       my $use_orange = shift;
+
+       my ($net_address, $net_mask) = split("/", $subnet);
+       if ((!$net_mask) || ($net_mask ~~ ["32", "255.255.255.255"])) {
+               return 0;
+       }
+
+       my @addresses = &get_internal_firewall_ip_addresses($use_orange);
+       foreach my $zone_address (@addresses) {
+               if (&General::IpInSubnet($zone_address, $net_address, $net_mask)) {
+                       return $zone_address;
+               }
+       }
+
+       return 0;
+}
 
 return 1;