[pve-devel] [PATCH pve-firewall v2 10/17] sdn: add vnet firewall configuration
Hannes Dürr
h.duerr at proxmox.com
Wed Nov 6 15:32:33 CET 2024
On 10/10/24 17:56, Stefan Hanreich wrote:
> Signed-off-by: Stefan Hanreich <s.hanreich at proxmox.com>
> ---
> src/PVE/Firewall.pm | 122 ++++++++++++++++++++++++++++++++++--
> src/PVE/Firewall/Helpers.pm | 12 ++++
> 2 files changed, 128 insertions(+), 6 deletions(-)
>
> diff --git a/src/PVE/Firewall.pm b/src/PVE/Firewall.pm
> index 9943f2e..e8096aa 100644
> --- a/src/PVE/Firewall.pm
> +++ b/src/PVE/Firewall.pm
> @@ -29,6 +29,7 @@ use PVE::RS::Firewall::SDN;
>
> my $pvefw_conf_dir = "/etc/pve/firewall";
> my $clusterfw_conf_filename = "$pvefw_conf_dir/cluster.fw";
> +my $vnetfw_conf_dir = "/etc/pve/sdn/firewall";
>
> # dynamically include PVE::QemuServer and PVE::LXC
> # to avoid dependency problems
> @@ -1290,6 +1291,12 @@ our $cluster_option_properties = {
> optional => 1,
> enum => ['ACCEPT', 'REJECT', 'DROP'],
> },
> + policy_forward => {
> + description => "Forward policy.",
> + type => 'string',
> + optional => 1,
> + enum => ['ACCEPT', 'DROP'],
> + },
> log_ratelimit => {
> description => "Log ratelimiting settings",
> type => 'string', format => {
> @@ -1329,6 +1336,8 @@ our $host_option_properties = {
> description => "Log level for incoming traffic." }),
> log_level_out => get_standard_option('pve-fw-loglevel', {
> description => "Log level for outgoing traffic." }),
> + log_level_forward => get_standard_option('pve-fw-loglevel', {
> + description => "Log level for forwarded traffic." }),
> tcp_flags_log_level => get_standard_option('pve-fw-loglevel', {
> description => "Log level for illegal tcp flags filter." }),
> smurf_log_level => get_standard_option('pve-fw-loglevel', {
> @@ -1476,6 +1485,23 @@ our $vm_option_properties = {
>
> };
>
> +our $vnet_option_properties = {
> + enable => {
> + description => "Enable/disable firewall rules.",
> + type => 'boolean',
> + default => 0,
> + optional => 1,
> + },
> + policy_forward => {
> + description => "Forward policy.",
> + type => 'string',
> + optional => 1,
> + enum => ['ACCEPT', 'DROP'],
> + },
> + log_level_forward => get_standard_option('pve-fw-loglevel', {
> + description => "Log level for forwarded traffic." }),
> +};
> +
>
> my $addr_list_descr = "This can refer to a single IP address, an IP set ('+ipsetname') or an IP alias definition. You can also specify an address range like '20.34.101.207-201.3.9.99', or a list of IP addresses and networks (entries are separated by comma). Please do not mix IPv4 and IPv6 addresses inside such lists.";
>
> @@ -1493,7 +1519,7 @@ my $rule_properties = {
> description => "Rule type.",
> type => 'string',
> optional => 1,
> - enum => ['in', 'out', 'group'],
> + enum => ['in', 'out', 'forward', 'group'],
> },
> action => {
> description => "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
> @@ -1651,10 +1677,20 @@ my $rule_env_iface_lookup = {
> 'ct' => 1,
> 'vm' => 1,
> 'group' => 0,
> + 'vnet' => 0,
> 'cluster' => 1,
> 'host' => 1,
> };
>
> +my $rule_env_direction_lookup = {
> + 'ct' => ['in', 'out', 'group'],
> + 'vm' => ['in', 'out', 'group'],
> + 'group' => ['in', 'out', 'forward'],
> + 'cluster' => ['in', 'out', 'forward', 'group'],
> + 'host' => ['in', 'out', 'forward', 'group'],
> + 'vnet' => ['forward', 'group'],
> +};
> +
> sub verify_rule {
> my ($rule, $cluster_conf, $fw_conf, $rule_env, $noerr) = @_;
>
> @@ -1725,7 +1761,13 @@ sub verify_rule {
> &$add_error('action', "missing property") if !$action;
nit: our perl style guide requires the following notation $add_error->(..)
>
> if ($type) {
> - if ($type eq 'in' || $type eq 'out') {
> + my $valid_types = $rule_env_direction_lookup->{$rule_env}
> + or die "unknown rule_env '$rule_env'\n";
> +
> + &$add_error('type', "invalid rule type '$type' for rule_env '$rule_env'")
same
> + if !grep (/^$type$/, @$valid_types);
> +
> + if ($type eq 'in' || $type eq 'out' || $type eq 'forward') {
> &$add_error('action', "unknown action '$action'")
same
> if $action && ($action !~ m/^(ACCEPT|DROP|REJECT)$/);
> } elsif ($type eq 'group') {
> @@ -2829,7 +2871,7 @@ sub parse_fw_rule {
> $rule->{type} = lc($1);
> $rule->{action} = $2;
>
> - if ($rule->{type} eq 'in' || $rule->{type} eq 'out') {
> + if ($rule->{type} eq 'in' || $rule->{type} eq 'out' || $rule->{type} eq 'forward') {
> if ($rule->{action} =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
> $rule->{macro} = $1;
> $rule->{action} = $2;
> @@ -2943,7 +2985,7 @@ sub parse_hostfw_option {
> if ($line =~ m/^(enable|nosmurfs|tcpflags|ndp|log_nf_conntrack|nf_conntrack_allow_invalid|protection_synflood|nftables):\s*(0|1)\s*$/i) {
> $opt = lc($1);
> $value = int($2);
> - } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
> + } elsif ($line =~ m/^(log_level_in|log_level_out|log_level_forward|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
> $opt = lc($1);
> $value = $2 ? lc($3) : '';
> } elsif ($line =~ m/^(nf_conntrack_helpers):\s*(((\S+)[,]?)+)\s*$/i) {
> @@ -2974,7 +3016,7 @@ sub parse_clusterfw_option {
> } elsif ($line =~ m/^(ebtables):\s*(0|1)\s*$/i) {
> $opt = lc($1);
> $value = int($2);
> - } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
> + } elsif ($line =~ m/^(policy_(in|out|forward)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
> $opt = lc($1);
> $value = uc($3);
> } elsif ($line =~ m/^(log_ratelimit):\s*(\S+)\s*$/) {
> @@ -2987,6 +3029,24 @@ sub parse_clusterfw_option {
> return ($opt, $value);
> }
>
> +sub parse_vnetfw_option {
> + my ($line) = @_;
> +
> + my ($opt, $value);
> +
> + if ($line =~ m/^(enable):\s*(\d+)\s*$/i) {
> + $opt = lc($1);
> + $value = int($2);
> + } elsif ($line =~ m/^(policy_forward):\s*(ACCEPT|DROP)\s*$/i) {
> + $opt = lc($1);
> + $value = uc($2);
> + } else {
> + die "can't parse option '$line'\n"
> + }
> +
> + return ($opt, $value);
> +}
> +
> sub resolve_alias {
> my ($clusterfw_conf, $fw_conf, $cidr, $scope) = @_;
>
> @@ -3153,6 +3213,8 @@ sub generic_fw_config_parser {
> ($opt, $value) = parse_clusterfw_option($line);
> } elsif ($rule_env eq 'host') {
> ($opt, $value) = parse_hostfw_option($line);
> + } elsif ($rule_env eq 'vnet') {
> + ($opt, $value) = parse_vnetfw_option($line);
> } else {
> ($opt, $value) = parse_vmfw_option($line);
> }
> @@ -3292,6 +3354,10 @@ sub lock_vmfw_conf {
> return PVE::Firewall::Helpers::lock_vmfw_conf(@_);
> }
>
> +sub lock_vnetfw_conf {
> + return PVE::Firewall::Helpers::lock_vnetfw_conf(@_);
> +}
> +
> sub load_vmfw_conf {
> my ($cluster_conf, $rule_env, $vmid, $dir) = @_;
>
> @@ -3318,7 +3384,7 @@ my $format_rules = sub {
> my $raw = '';
>
> foreach my $rule (@$rules) {
> - if ($rule->{type} eq 'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
> + if ($rule->{type} eq 'in' || $rule->{type} eq 'out' || $rule->{type} eq 'forward' || $rule->{type} eq 'group') {
> $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
> $raw .= uc($rule->{type});
> if ($rule->{macro}) {
> @@ -3794,6 +3860,50 @@ sub save_hostfw_conf {
> }
> }
>
> +sub load_vnetfw_conf {
> + my ($cluster_conf, $rule_env, $vnet, $dir) = @_;
> +
> + $rule_env = 'vnet' if !defined($rule_env);
> +
> + my $filename = "$vnetfw_conf_dir/$vnet.fw";
> +
> + my $empty_conf = {
> + rules => [],
> + options => {},
> + };
> +
> + my $vnetfw_conf = generic_fw_config_parser($filename, $cluster_conf, $empty_conf, $rule_env);
> + $vnetfw_conf->{vnet} = $vnet;
> +
> + return $vnetfw_conf;
> +}
> +
> +sub save_vnetfw_conf {
> + my ($vnet, $conf) = @_;
> +
> + my $filename = "$vnetfw_conf_dir/$vnet.fw";
> +
> + my $raw = '';
> +
> + my $options = $conf->{options};
> + $raw .= &$format_options($options) if $options && scalar(keys %$options);
same
> +
> + my $rules = $conf->{rules};
> + if ($rules && scalar(@$rules)) {
> + $raw .= "[RULES]\n\n";
> + $raw .= &$format_rules($rules, 1);
same
> + $raw .= "\n";
> + }
> +
> + mkdir($vnetfw_conf_dir, 0755) if !-d $vnetfw_conf_dir;
> +
> + if ($raw) {
> + PVE::Tools::file_set_contents($filename, $raw);
> + } else {
> + unlink $filename;
> + }
> +}
> +
> sub compile {
> my ($cluster_conf, $hostfw_conf, $vmdata, $corosync_conf) = @_;
>
> diff --git a/src/PVE/Firewall/Helpers.pm b/src/PVE/Firewall/Helpers.pm
> index 7dcbca3..0b465ae 100644
> --- a/src/PVE/Firewall/Helpers.pm
> +++ b/src/PVE/Firewall/Helpers.pm
> @@ -32,6 +32,18 @@ sub lock_vmfw_conf {
> return $res;
> }
>
> +sub lock_vnetfw_conf {
> + my ($vnet, $timeout, $code, @param) = @_;
> +
> + die "can't lock vnet firewall config for undefined vnet\n"
> + if !defined($vnet);
> +
> + my $res = PVE::Cluster::cfs_lock_firewall("vnet-$vnet", $timeout, $code, @param);
> + die $@ if $@;
> +
> + return $res;
> +}
> +
> sub remove_vmfw_conf {
> my ($vmid) = @_;
>
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