[pve-devel] [PATCH V3 firewall 1/2] allow non zero ip address host bits to be entered
Stefan Hrdlicka
s.hrdlicka at proxmox.com
Tue Dec 13 16:14:18 CET 2022
They can already be set directly via the cluster.fw file. Net::IP is just a
bit more picky with what it allows:
For example:
error: 192.168.1.155/24
correct: 192.168.1.0/24
This cleans the entered IP and removes the non zero host bits.
Signed-off-by: Stefan Hrdlicka <s.hrdlicka at proxmox.com>
---
src/PVE/API2/Firewall/IPSet.pm | 2 +-
src/PVE/Firewall.pm | 19 ++++++++++++++++++-
2 files changed, 19 insertions(+), 2 deletions(-)
diff --git a/src/PVE/API2/Firewall/IPSet.pm b/src/PVE/API2/Firewall/IPSet.pm
index a5f69e9..14bcfcb 100644
--- a/src/PVE/API2/Firewall/IPSet.pm
+++ b/src/PVE/API2/Firewall/IPSet.pm
@@ -199,7 +199,7 @@ sub register_create_ip {
my ($cluster_conf, $fw_conf, $ipset) = $class->load_config($param);
- my $cidr = $param->{cidr};
+ my $cidr = PVE::Firewall::clean_cidr($param->{cidr});
if ($cidr =~ m/^${PVE::Firewall::ip_alias_pattern}$/) {
# make sure alias exists (if $cidr is an alias)
PVE::Firewall::resolve_alias($cluster_conf, $fw_conf, $cidr);
diff --git a/src/PVE/Firewall.pm b/src/PVE/Firewall.pm
index d40a9b1..ae5f221 100644
--- a/src/PVE/Firewall.pm
+++ b/src/PVE/Firewall.pm
@@ -69,8 +69,12 @@ sub pve_verify_ip_or_cidr {
my ($cidr, $noerr) = @_;
if ($cidr =~ m!^(?:$IPV6RE|$IPV4RE)(/(\d+))?$!) {
- return $cidr if Net::IP->new($cidr);
+ # Net::IP throws an error if the masked CIDR part isn't zero, e.g., `192.168.1.155/24`
+ # fails but `192.168.1.0/24` succeeds. clean_cidr removes the non zero bits from the CIDR.
+ my $clean_cidr = clean_cidr($cidr);
+ return $cidr if Net::IP->new($clean_cidr);
return undef if $noerr;
+
die Net::IP::Error() . "\n";
}
return undef if $noerr;
@@ -86,6 +90,19 @@ sub pve_verify_ip_or_cidr_or_alias {
return pve_verify_ip_or_cidr($cidr, $noerr);
}
+sub clean_cidr {
+ my ($cidr) = @_;
+ my ($ip, $len) = split('/', $cidr);
+ return $cidr if !$len;
+ my $ver = ($ip =~ m!^$IPV4RE$!) ? 4 : 6;
+
+ my $bin_ip = Net::IP::ip_iptobin( Net::IP::ip_expand_address($ip, $ver), $ver);
+ my $bin_mask = Net::IP::ip_get_mask($len, $ver);
+ my $clean_ip = Net::IP::ip_compress_address( Net::IP::ip_bintoip($bin_ip & $bin_mask, $ver), $ver);
+
+ return "${clean_ip}/$len";
+}
+
PVE::JSONSchema::register_standard_option('ipset-name', {
description => "IP set name.",
type => 'string',
--
2.30.2
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