# %rule
#
# name => optional
+# enable => [0|1]
# action =>
# proto =>
-# sport =>
-# dport =>
+# sport => port[,port[,port]].. or port:port
+# dport => port[,port[,port]].. or port:port
# log => optional, loglevel
# logmsg => optional, logmsg - overwrites default
-# iface_in
-# iface_out
+# iface_in => incomin interface
+# iface_out => outgoing interface
# match => optional, overwrites generation of match
# target => optional, overwrites action
return $etc_services;
}
-my $etc_protocols;
-
-sub get_etc_protocols {
- return $etc_protocols if $etc_protocols;
-
- my $filename = "/etc/protocols";
+sub parse_protocol_file {
+ my ($filename) = @_;
my $fh = IO::File->new($filename, O_RDONLY);
if (!$fh) {
next if $line =~m/^#/;
next if ($line =~m/^\s*$/);
- if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
+ if ($line =~ m!^(\S+)\s+(\d+)(?:\s+.*)?$!) {
$protocols->{byid}->{$2}->{name} = $1;
$protocols->{byname}->{$1} = $protocols->{byid}->{$2};
}
close($fh);
+ return $protocols;
+}
+
+my $etc_protocols;
+
+sub get_etc_protocols {
+ return $etc_protocols if $etc_protocols;
+
+ my $protocols = parse_protocol_file('/etc/protocols');
+
# add special case for ICMP v6
$protocols->{byid}->{icmpv6}->{name} = "icmpv6";
$protocols->{byname}->{icmpv6} = $protocols->{byid}->{icmpv6};
my @elements = split(/,/, $str);
die "extraneous commas in list\n" if $str ne join(',', @elements);
foreach my $item (@elements) {
- $count++;
if ($item =~ m/^(\d+):(\d+)$/) {
+ $count += 2;
my ($port1, $port2) = ($1, $2);
die "invalid port '$port1'\n" if $port1 > 65535;
die "invalid port '$port2'\n" if $port2 > 65535;
} elsif ($item =~ m/^(\d+)$/) {
+ $count += 1;
my $port = $1;
die "invalid port '$port'\n" if $port > 65535;
} else {
}
}
- die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 1;
+ die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 0;
+
+ # I really don't like to use the word number here, but it's the only thing
+ # that makes sense in a literal way. The range 1:100 counts as 2, not as
+ # one and not as 100...
+ die "too many entries in port list (> 15 numbers)\n"
+ if $count > 15;
- return $count;
+ return (scalar(@elements) > 1);
}
PVE::JSONSchema::register_format('pve-fw-sport-spec', \&pve_fw_verify_sport_spec);
return $res;
}
-sub ruleset_generate_match {
- my ($ruleset, $chain, $ipversion, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
-
- return if defined($rule->{enable}) && !$rule->{enable};
- return if $rule->{errors};
-
- return $rule->{match} if defined $rule->{match};
-
- die "unable to emit macro - internal error" if $rule->{macro}; # should not happen
-
- my $nbdport = defined($rule->{dport}) ? parse_port_name_number_or_range($rule->{dport}, 1) : 0;
- my $nbsport = defined($rule->{sport}) ? parse_port_name_number_or_range($rule->{sport}, 0) : 0;
-
- my @cmd = ();
+# substitude action of rule according to action hash
+sub rule_substitude_action {
+ my ($rule, $actions) = @_;
- push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in};
- push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out};
-
- my $source = $rule->{source};
- my $dest = $rule->{dest};
-
- if ($source) {
- if ($source =~ m/^\+/) {
- if ($source =~ m/^\+(${ipset_name_pattern})$/) {
- my $name = $1;
- if ($fw_conf && $fw_conf->{ipset}->{$name}) {
- my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name, $ipversion);
- push @cmd, "-m set --match-set ${ipset_chain} src";
- } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
- my $ipset_chain = compute_ipset_chain_name(0, $name, $ipversion);
- push @cmd, "-m set --match-set ${ipset_chain} src";
- } else {
- die "no such ipset '$name'\n";
- }
- } else {
- die "invalid security group name '$source'\n";
- }
- } elsif ($source =~ m/^${ip_alias_pattern}$/){
- my $alias = lc($source);
- my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
- $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
- die "no such alias '$source'\n" if !$e;
- push @cmd, "-s $e->{cidr}";
- } elsif ($source =~ m/\-/){
- push @cmd, "-m iprange --src-range $source";
- } else {
- push @cmd, "-s $source";
- }
+ if (my $action = $rule->{action}) {
+ $rule->{action} = $actions->{$action} if defined($actions->{$action});
}
+}
- if ($dest) {
- if ($dest =~ m/^\+/) {
- if ($dest =~ m/^\+(${ipset_name_pattern})$/) {
- my $name = $1;
- if ($fw_conf && $fw_conf->{ipset}->{$name}) {
- my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name, $ipversion);
- push @cmd, "-m set --match-set ${ipset_chain} dst";
- } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
- my $ipset_chain = compute_ipset_chain_name(0, $name, $ipversion);
- push @cmd, "-m set --match-set ${ipset_chain} dst";
- } else {
- die "no such ipset '$name'\n";
- }
+# generate a src or dst match
+# $dir(ection) is either d or s
+sub ipt_gen_src_or_dst_match {
+ my ($adr, $dir, $ipversion, $cluster_conf, $fw_conf) = @_;
+
+ my $srcdst;
+ if ($dir eq 's') {
+ $srcdst = "src";
+ } elsif ($dir eq 'd') {
+ $srcdst = "dst";
+ } else {
+ die "ipt_gen_src_or_dst_match: invalid direction $dir \n";
+ }
+
+ my $match;
+ if ($adr =~ m/^\+/) {
+ if ($adr =~ m/^\+(${ipset_name_pattern})$/) {
+ my $name = $1;
+ my $ipset_chain;
+ if ($fw_conf && $fw_conf->{ipset}->{$name}) {
+ $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name, $ipversion);
+ } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
+ $ipset_chain = compute_ipset_chain_name(0, $name, $ipversion);
} else {
- die "invalid security group name '$dest'\n";
+ die "no such ipset '$name'\n";
}
- } elsif ($dest =~ m/^${ip_alias_pattern}$/){
- my $alias = lc($dest);
- my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
- $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
- die "no such alias '$dest'\n" if !$e;
- push @cmd, "-d $e->{cidr}";
- } elsif ($dest =~ m/^(\d+)\.(\d+).(\d+).(\d+)\-(\d+)\.(\d+).(\d+).(\d+)$/){
- push @cmd, "-m iprange --dst-range $dest";
+ $match = "-m set --match-set ${ipset_chain} ${srcdst}";
} else {
- push @cmd, "-d $dest";
- }
+ die "invalid security group name '$adr'\n";
+ }
+ } elsif ($adr =~ m/^${ip_alias_pattern}$/){
+ my $alias = lc($adr);
+ my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
+ $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
+ die "no such alias '$adr'\n" if !$e;
+ $match = "-${dir} $e->{cidr}";
+ } elsif ($adr =~ m/\-/){
+ $match = "-m iprange --${srcdst}-range $adr";
+ } else {
+ $match = "-${dir} $adr";
}
- if (my $proto = $rule->{proto}) {
- push @cmd, "-p $proto";
+ return $match;
+}
- my $multiport = 0;
- $multiport++ if $nbdport > 1;
- $multiport++ if $nbsport > 1;
+# convert a %rule to an array of iptables commands
+sub ipt_rule_to_cmds {
+ my ($rule, $chain, $ipversion, $cluster_conf, $fw_conf, $vmid) = @_;
- push @cmd, "--match multiport" if $multiport;
+ die "ipt_rule_to_cmds unable to handle macro" if $rule->{macro}; #should not happen
- die "multiport: option '--sports' cannot be used together with '--dports'\n"
- if ($multiport == 2) && ($rule->{dport} ne $rule->{sport});
+ my @match = ();
- if ($rule->{dport}) {
- if ($proto eq 'icmp') {
- # Note: we use dport to store --icmp-type
- die "unknown icmp-type '$rule->{dport}'\n"
- if $rule->{dport} !~ /^\d+$/ && !defined($icmp_type_names->{$rule->{dport}});
- push @cmd, "-m icmp --icmp-type $rule->{dport}";
- } elsif ($proto eq 'icmpv6') {
- # Note: we use dport to store --icmpv6-type
- die "unknown icmpv6-type '$rule->{dport}'\n"
- if $rule->{dport} !~ /^\d+$/ && !defined($icmpv6_type_names->{$rule->{dport}});
- push @cmd, "-m icmpv6 --icmpv6-type $rule->{dport}";
- } elsif (!$PROTOCOLS_WITH_PORTS->{$proto}) {
- die "protocol $proto does not have ports\n";
- } else {
- if ($nbdport > 1) {
- if ($multiport == 2) {
- push @cmd, "--ports $rule->{dport}";
- } else {
- push @cmd, "--dports $rule->{dport}";
- }
+ if (defined $rule->{match}) {
+ push @match, $rule->{match};
+ } else {
+ push @match, "-i $rule->{iface_in}" if $rule->{iface_in};
+ push @match, "-o $rule->{iface_out}" if $rule->{iface_out};
+
+ if ($rule->{source}) {
+ push @match, ipt_gen_src_or_dst_match($rule->{source}, 's', $ipversion, $cluster_conf, $fw_conf);
+ }
+ if ($rule->{dest}) {
+ push @match, ipt_gen_src_or_dst_match($rule->{dest}, 'd', $ipversion, $cluster_conf, $fw_conf);
+ }
+
+ if (my $proto = $rule->{proto}) {
+ push @match, "-p $proto";
+
+ my $multidport = defined($rule->{dport}) && parse_port_name_number_or_range($rule->{dport}, 1);
+ my $multisport = defined($rule->{sport}) && parse_port_name_number_or_range($rule->{sport}, 0);
+
+ my $add_dport = sub {
+ return if !$rule->{dport};
+
+ if ($proto eq 'icmp') {
+ # Note: we use dport to store --icmp-type
+ die "unknown icmp-type '$rule->{dport}'\n"
+ if $rule->{dport} !~ /^\d+$/ && !defined($icmp_type_names->{$rule->{dport}});
+ push @match, "-m icmp --icmp-type $rule->{dport}";
+ } elsif ($proto eq 'icmpv6') {
+ # Note: we use dport to store --icmpv6-type
+ die "unknown icmpv6-type '$rule->{dport}'\n"
+ if $rule->{dport} !~ /^\d+$/ && !defined($icmpv6_type_names->{$rule->{dport}});
+ push @match, "-m icmpv6 --icmpv6-type $rule->{dport}";
+ } elsif (!$PROTOCOLS_WITH_PORTS->{$proto}) {
+ die "protocol $proto does not have ports\n";
+ } elsif ($multidport) {
+ push @match, "--match multiport", "--dports $rule->{dport}";
} else {
- push @cmd, "--dport $rule->{dport}";
+ push @match, "--dport $rule->{dport}";
}
- }
- }
-
- if ($rule->{sport}) {
- die "protocol $proto does not have ports\n"
- if !$PROTOCOLS_WITH_PORTS->{$proto};
- if ($nbsport > 1) {
- push @cmd, "--sports $rule->{sport}" if $multiport != 2;
- } else {
- push @cmd, "--sport $rule->{sport}";
- }
- }
- } elsif ($rule->{dport} || $rule->{sport}) {
- die "destination port '$rule->{dport}', but no protocol specified\n" if $rule->{dport};
- die "source port '$rule->{sport}', but no protocol specified\n" if $rule->{sport};
- }
-
- push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
-
- return scalar(@cmd) ? join(' ', @cmd) : undef;
-}
+ };
-sub ruleset_generate_action {
- my ($ruleset, $chain, $ipversion, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
+ my $add_sport = sub {
+ return if !$rule->{sport};
- return $rule->{target} if defined $rule->{target};
+ die "protocol $proto does not have ports\n"
+ if !$PROTOCOLS_WITH_PORTS->{$proto};
+ if ($multisport) {
+ push @match, "--match multiport", "--sports $rule->{sport}";
+ } else {
+ push @match, "--sport $rule->{sport}";
+ }
+ };
- my @cmd = ();
+ # order matters - single port before multiport!
+ $add_dport->() if $multisport;
+ $add_sport->();
+ $add_dport->() if !$multisport;
+ } elsif ($rule->{dport} || $rule->{sport}) {
+ die "destination port '$rule->{dport}', but no protocol specified\n" if $rule->{dport};
+ die "source port '$rule->{sport}', but no protocol specified\n" if $rule->{sport};
+ }
- if (my $action = $rule->{action}) {
- $action = $actions->{$action} if defined($actions->{$action});
- $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
- push @cmd, $goto ? "-g $action" : "-j $action";
+ push @match, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
}
+ my $matchstr = scalar(@match) ? join(' ', @match) : "";
- return scalar(@cmd) ? join(' ', @cmd) : undef;
-}
-
-sub ruleset_generate_cmdstr {
- my ($ruleset, $chain, $ipversion, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
- my $match = ruleset_generate_match($ruleset, $chain, $ipversion, $rule, $actions, $goto, $cluster_conf, $fw_conf);
- my $action = ruleset_generate_action($ruleset, $chain, $ipversion, $rule, $actions, $goto, $cluster_conf, $fw_conf);
+ my $targetstr;
+ if (defined $rule->{target}) {
+ $targetstr = $rule->{target};
+ } else {
+ my $action = (defined $rule->{action}) ? $rule->{action} : "";
+ my $goto = 1 if $action eq 'PVEFW-SET-ACCEPT-MARK';
+ $targetstr = ($goto) ? "-g $action" : "-j $action";
+ }
- return undef if !(defined($match) or defined($action));
- my $ret = defined($match) ? $match : "";
- $ret = "$ret $action" if defined($action);
- return $ret;
+ my @iptcmds;
+ if (defined $rule->{log} && $rule->{log}) {
+ my $logaction = get_log_rule_base($chain, $vmid, $rule->{logmsg}, $rule->{log});
+ push @iptcmds, "-A $chain $matchstr $logaction";
+ }
+ push @iptcmds, "-A $chain $matchstr $targetstr";
+ return @iptcmds;
}
sub ruleset_generate_rule {
- my ($ruleset, $chain, $ipversion, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
+ my ($ruleset, $chain, $ipversion, $rule, $cluster_conf, $fw_conf) = @_;
my $rules;
}
# update all or nothing
-
- # fixme: lots of temporary ugliness
- my @mstrs = ();
- my @astrs = ();
- my @logging = ();
- my @logmsg = ();
- foreach my $tmp (@$rules) {
- my $m = ruleset_generate_match($ruleset, $chain, $ipversion, $tmp, $actions, $goto, $cluster_conf, $fw_conf);
- my $a = ruleset_generate_action($ruleset, $chain, $ipversion, $tmp, $actions, $goto, $cluster_conf, $fw_conf);
- if (defined $m or defined $a) {
- push @mstrs, defined($m) ? $m : "";
- push @astrs, defined($a) ? $a : "";
- push @logging, $tmp->{log};
- push @logmsg, $tmp->{logmsg};
- }
+ my @ipt_rule_cmds;
+ foreach my $r (@$rules) {
+ push @ipt_rule_cmds, ipt_rule_to_cmds($r, $chain, $ipversion, $cluster_conf, $fw_conf);
}
-
- for my $i (0 .. $#mstrs) {
- ruleset_addrule($ruleset, $chain, $mstrs[$i], $astrs[$i], $logging[$i], $logmsg[$i]);
- }
-}
-
-sub ruleset_generate_rule_insert {
- my ($ruleset, $chain, $ipversion, $rule, $actions, $goto) = @_;
-
- die "implement me" if $rule->{macro}; # not implemented, because not needed so far
-
- my $match = ruleset_generate_match($ruleset, $chain, $ipversion, $rule, $actions, $goto);
- my $action = ruleset_generate_action($ruleset, $chain, $ipversion, $rule, $actions, $goto);
- if (defined $match && defined $action) {
- ruleset_insertrule($ruleset, $chain, $match, $action);
+ foreach my $c (@ipt_rule_cmds) {
+ ruleset_add_ipt_cmd($ruleset, $chain, $c);
}
}
return $ruleset->{$chain} ? 1 : undef;
}
+# add an iptables command (like generated by ipt_rule_to_cmds) to a chain
+sub ruleset_add_ipt_cmd {
+ my ($ruleset, $chain, $iptcmd) = @_;
+
+ die "no such chain '$chain'\n" if !$ruleset->{$chain};
+
+ push @{$ruleset->{$chain}}, $iptcmd;
+}
+
sub ruleset_addrule {
my ($ruleset, $chain, $match, $action, $log, $logmsg, $vmid) = @_;
if ($policy eq 'ACCEPT') {
- ruleset_generate_rule($ruleset, $chain, $ipversion, { action => 'ACCEPT' },
- { ACCEPT => $accept_action});
+ my $rule = { action => 'ACCEPT' };
+ rule_substitude_action($rule, { ACCEPT => $accept_action});
+ ruleset_generate_rule($ruleset, $chain, $ipversion, $rule);
} elsif ($policy eq 'DROP') {
next if $rule->{type} ne $lc_direction;
eval {
if ($direction eq 'OUT') {
- ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
- { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
- undef, $cluster_conf, $vmfw_conf);
+ rule_substitude_action($rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" });
+ ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $vmfw_conf);
} else {
- ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
- { ACCEPT => $in_accept , REJECT => "PVEFW-reject" },
- undef, $cluster_conf, $vmfw_conf);
+ rule_substitude_action($rule, { ACCEPT => $in_accept , REJECT => "PVEFW-reject" });
+ ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $vmfw_conf);
}
};
warn $@ if $@;
if ($rule->{type} eq 'group') {
ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action, $ipversion);
} elsif ($rule->{type} eq 'in') {
- ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
- { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
- undef, $cluster_conf, $hostfw_conf);
+ rule_substitude_action($rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" });
+ ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $hostfw_conf);
}
};
warn $@ if $@;
if ($rule->{type} eq 'group') {
ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action, $ipversion);
} elsif ($rule->{type} eq 'out') {
- ruleset_generate_rule($ruleset, $chain, $ipversion,
- $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
- undef, $cluster_conf, $hostfw_conf);
+ rule_substitude_action($rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" });
+ ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $hostfw_conf);
}
};
warn $@ if $@;
foreach my $rule (@$rules) {
next if $rule->{type} ne 'in';
+ next if !$rule->{enable} || $rule->{errors};
next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
- ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
- { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
- undef, $cluster_conf);
+ rule_substitude_action($rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" });
+ ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf);
}
$chain = "GROUP-${group}-OUT";
foreach my $rule (@$rules) {
next if $rule->{type} ne 'out';
+ next if !$rule->{enable} || $rule->{errors};
next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
# we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
# check also other tap rules later
- ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
- { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" },
- undef, $cluster_conf);
+ rule_substitude_action($rule, { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" });
+ ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf);
}
}
projects / pve-firewall.git / blobdiff