[pve-devel] [PATCH firewall 2/3] fix #4556: introduce 'dc' and 'vm' prefix for aliases

[Leo Nunner]

since they had the same issue as IPSets, detailed in #4556. The format
works the same as for IPSets:

    dc/alias
	Looks for the alias on the Datacenter level.
    vm/alias
	Looks for the alias on the VM level.
    alias
	Uses the previous method of scoping, where it first looks at the
	VM level and then at the Datacenter level.

Signed-off-by: Leo Nunner <l.nunner at proxmox.com>
---
 src/PVE/API2/Firewall/IPSet.pm |  9 ++++--
 src/PVE/Firewall.pm            | 58 +++++++++++++++++++++++-----------
 2 files changed, 46 insertions(+), 21 deletions(-)

diff --git a/src/PVE/API2/Firewall/IPSet.pm b/src/PVE/API2/Firewall/IPSet.pm
index 14bcfcb..515f2d3 100644
--- a/src/PVE/API2/Firewall/IPSet.pm
+++ b/src/PVE/API2/Firewall/IPSet.pm
@@ -199,11 +199,14 @@ sub register_create_ip {
 
 		my ($cluster_conf, $fw_conf, $ipset) = $class->load_config($param);
 
-		my $cidr = PVE::Firewall::clean_cidr($param->{cidr});
-		if ($cidr =~ m/^${PVE::Firewall::ip_alias_pattern}$/) {
+		my $cidr = $param->{cidr};
+		if ($cidr =~ m@^(dc/|vm/)?(${PVE::Firewall::ip_alias_pattern})$@) {
+		    my $scope = $1 // "";
+		    my $alias = $2;
 		    # make sure alias exists (if $cidr is an alias)
-		    PVE::Firewall::resolve_alias($cluster_conf, $fw_conf, $cidr);
+		    PVE::Firewall::resolve_alias($cluster_conf, $fw_conf, $alias, $scope);
 		} else {
+		    $cidr = PVE::Firewall::clean_cidr($cidr);
 		    # normalize like config parser, otherwise duplicates might slip through
 		    $cidr = PVE::Firewall::parse_ip_or_cidr($cidr);
 		}
diff --git a/src/PVE/Firewall.pm b/src/PVE/Firewall.pm
index ff18de0..ecde176 100644
--- a/src/PVE/Firewall.pm
+++ b/src/PVE/Firewall.pm
@@ -85,7 +85,7 @@ PVE::JSONSchema::register_format('IPorCIDRorAlias', \&pve_verify_ip_or_cidr_or_a
 sub pve_verify_ip_or_cidr_or_alias {
     my ($cidr, $noerr) = @_;
 
-    return if $cidr =~ m/^(?:$ip_alias_pattern)$/;
+    return if $cidr =~ m@^(dc/|vm/)?(?:$ip_alias_pattern)$@;
 
     return pve_verify_ip_or_cidr($cidr, $noerr);
 }
@@ -1067,7 +1067,7 @@ sub parse_address_list {
 	return;
     }
 
-    if ($str =~ m/^${ip_alias_pattern}$/) {
+    if ($str =~ m@^(dc/|vm/)?${ip_alias_pattern}$@) {
 	die "alias name too long\n" if length($str) > $max_alias_name_length;
 	return;
     }
@@ -1690,12 +1690,19 @@ sub verify_rule {
 		} else {
 		    &$add_error($name, "invalid ipset name '$value'");
 		}
-	    } elsif ($value =~ m/^${ip_alias_pattern}$/){
-		my $alias = lc($value);
+	    } elsif ($value =~ m@^(vm/|dc/)?(${ip_alias_pattern})$@){
+		my $scope = $1 // "";
+		my $alias = lc($2);
 		&$add_error($name, "no such alias '$value'")
 		    if !($cluster_conf->{aliases}->{$alias} || ($fw_conf && $fw_conf->{aliases}->{$alias}));
-		my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
-		$e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
+
+		my $e;
+		if ($scope ne 'dc/' && $fw_conf) {
+		    $e = $fw_conf->{aliases}->{$alias};
+		}
+		if ($scope ne 'vm/' && !$e && $cluster_conf) {
+		    $e = $cluster_conf->{aliases}->{$alias};
+		}
 
 		&$set_ip_version($e->{ipversion});
 	    }
@@ -2096,7 +2103,7 @@ sub ipt_gen_src_or_dst_match {
     my $match;
     if ($adr =~ m/^\+/) {
 	if ($adr =~ m@^\+(vm/|dc/)?(${ipset_name_pattern})$@) {
-	    my $scope = $1;
+	    my $scope = $1 // "";
 	    my $name = $2;
 	    my $ipset_chain;
 	    if ($scope ne 'dc/' && $fw_conf && $fw_conf->{ipset}->{$name}) {
@@ -2110,10 +2117,16 @@ sub ipt_gen_src_or_dst_match {
 	} else {
 	    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 && $cluster_conf;
+    } elsif ($adr =~ m@^(dc/|vm/)?(${ip_alias_pattern})$@){
+	my $scope = $1 // "";
+	my $alias = lc($2);
+	my $e;
+	if ($scope ne 'dc/' && $fw_conf) {
+	    $e = $fw_conf->{aliases}->{$alias};
+	}
+	if ($scope ne 'vm/' && !$e && $cluster_conf) {
+	    $e = $cluster_conf->{aliases}->{$alias};
+	}
 	die "no such alias '$adr'\n" if !$e;
 	$match = "-${dir} $e->{cidr}";
     } elsif ($adr =~ m/\-/){
@@ -2964,11 +2977,16 @@ sub parse_clusterfw_option {
 }
 
 sub resolve_alias {
-    my ($clusterfw_conf, $fw_conf, $cidr) = @_;
+    my ($clusterfw_conf, $fw_conf, $cidr, $scope) = @_;
 
     my $alias = lc($cidr);
-    my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
-    $e = $clusterfw_conf->{aliases}->{$alias} if !$e && $clusterfw_conf;
+    my $e;
+    if ($scope ne 'dc/' && $fw_conf) {
+	$e = $fw_conf->{aliases}->{$alias};
+    }
+    if ($scope ne 'vm/' && !$e && $clusterfw_conf) {
+	$e = $clusterfw_conf->{aliases}->{$alias};
+    }
 
     die "no such alias '$cidr'\n" if !$e;;
 
@@ -3156,8 +3174,10 @@ sub generic_fw_config_parser {
 	    }
 
 	    eval {
-		if ($cidr =~ m/^${ip_alias_pattern}$/) {
-		    resolve_alias($cluster_conf, $res, $cidr); # make sure alias exists
+		if ($cidr =~ m@^(dc/|vm/)?(${ip_alias_pattern}$)@) {
+		    my $scope = $1 // "";
+		    my $alias = $2;
+		    resolve_alias($cluster_conf, $res, $alias, $scope); # make sure alias exists
 		} else {
 		    $cidr = parse_ip_or_cidr($cidr);
 		}
@@ -3508,8 +3528,10 @@ sub generate_ipset_chains {
 	    next if $entry->{errors}; # skip entries with errors
 	    eval {
 		my ($cidr, $ver);
-		if ($entry->{cidr} =~ m/^${ip_alias_pattern}$/) {
-		    ($cidr, $ver) = resolve_alias($clusterfw_conf, $fw_conf, $entry->{cidr});
+		if ($entry->{cidr} =~ m@^(dc/|vm/)?(${ip_alias_pattern})$@) {
+		    my $scope = $1 // "";
+		    my $alias = $2;
+		    ($cidr, $ver) = resolve_alias($clusterfw_conf, $fw_conf, $alias, $scope);
 		} else {
 		    ($cidr, $ver) = parse_ip_or_cidr($entry->{cidr});
 		}
-- 
2.30.2