From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from firstgate.proxmox.com (firstgate.proxmox.com [212.224.123.68]) by lore.proxmox.com (Postfix) with ESMTPS id E5B961FF13F for ; Thu, 07 May 2026 14:43:22 +0200 (CEST) Received: from firstgate.proxmox.com (localhost [127.0.0.1]) by firstgate.proxmox.com (Proxmox) with ESMTP id 1589F19D09; Thu, 7 May 2026 14:41:10 +0200 (CEST) From: Stefan Hanreich To: pve-devel@lists.proxmox.com Subject: [PATCH pve-network v4 17/31] sdn: add wireguard helper module Date: Thu, 7 May 2026 14:39:52 +0200 Message-ID: <20260507124008.417223-18-s.hanreich@proxmox.com> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260507124008.417223-1-s.hanreich@proxmox.com> References: <20260507124008.417223-1-s.hanreich@proxmox.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Bm-Milter-Handled: 55990f41-d878-4baa-be0a-ee34c49e34d2 X-Bm-Transport-Timestamp: 1778157509776 X-SPAM-LEVEL: Spam detection results: 0 AWL 0.641 Adjusted score from AWL reputation of From: address BAYES_00 -1.9 Bayes spam probability is 0 to 1% DMARC_MISSING 0.1 Missing DMARC policy KAM_DMARC_STATUS 0.01 Test Rule for DKIM or SPF Failure with Strict Alignment SPF_HELO_NONE 0.001 SPF: HELO does not publish an SPF Record SPF_PASS -0.001 SPF: sender matches SPF record Message-ID-Hash: 4MDWNQ54FUOLCMWJHAFJEJPOEU5KO24V X-Message-ID-Hash: 4MDWNQ54FUOLCMWJHAFJEJPOEU5KO24V X-MailFrom: s.hanreich@proxmox.com X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; loop; banned-address; emergency; member-moderation; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; digests; suspicious-header X-Mailman-Version: 3.3.10 Precedence: list List-Id: Proxmox VE development discussion List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: From: Christoph Heiss A new module that contains helper functions for dealing with WireGuard config and key generation. They are later used in the API methods, as well as the SDN commit_config. Co-authored-by: Stefan Hanreich Signed-off-by: Christoph Heiss --- src/PVE/Network/SDN/Makefile | 3 +- src/PVE/Network/SDN/WireGuard.pm | 162 +++++++++++++++++++++++++++++++ 2 files changed, 164 insertions(+), 1 deletion(-) create mode 100644 src/PVE/Network/SDN/WireGuard.pm diff --git a/src/PVE/Network/SDN/Makefile b/src/PVE/Network/SDN/Makefile index 2a476ce..d0b4bce 100644 --- a/src/PVE/Network/SDN/Makefile +++ b/src/PVE/Network/SDN/Makefile @@ -10,7 +10,8 @@ SOURCES=Vnets.pm\ Fabrics.pm\ Frr.pm\ PrefixLists.pm\ - RouteMaps.pm + RouteMaps.pm\ + WireGuard.pm PERL5DIR=${DESTDIR}/usr/share/perl5 diff --git a/src/PVE/Network/SDN/WireGuard.pm b/src/PVE/Network/SDN/WireGuard.pm new file mode 100644 index 0000000..bb69475 --- /dev/null +++ b/src/PVE/Network/SDN/WireGuard.pm @@ -0,0 +1,162 @@ +package PVE::Network::SDN::WireGuard; + +use strict; +use warnings; + +=head1 NAME + +C - Helper module for WireGuard + +=head1 DESCRIPTION + +This module contains helpers for handling and applying WireGuard configuration. + +=cut + +use File::Basename; + +use PVE::Cluster qw(cfs_register_file cfs_read_file cfs_lock_file cfs_write_file); +use PVE::File; +use PVE::INotify; +use PVE::RESTEnvironment qw(log_warn); +use PVE::RS::SDN::WireGuard::PrivateKeys; +use PVE::Tools qw(file_get_contents file_set_contents run_command); + +use PVE::Network::SDN::Fabrics; + +my $local_wireguard_lock = "/var/lock/proxmox_wg.lock"; + +my $wireguard_config_folder = "/etc/wireguard/proxmox"; +my $wireguard_private_key_file = "/etc/pve/priv/wg-keys.cfg"; + +cfs_register_file( + 'priv/wg-keys.cfg', \&parse_wg_keys, \&write_wg_keys, +); + +sub parse_wg_keys { + my ($filename, $raw) = @_; + return $raw // ''; +} + +sub write_wg_keys { + my ($filename, $config) = @_; + return $config // ''; +} + +=head3 private_keys() + +Reads and returns the private key configuration for WireGuard. + +=cut + +sub private_keys { + my $private_key_config = cfs_read_file('priv/wg-keys.cfg'); + return PVE::RS::SDN::WireGuard::PrivateKeys->config($private_key_config); +} + +=head3 write_private_keys($private_key_config) + +Writes the given private key configuration to the section config file. + +It is the callers responsibility to only call this function when the SDN domain +lock has been acquired. + +=cut + +sub write_private_keys { + my ($config) = @_; + cfs_write_file("priv/wg-keys.cfg", $config->to_raw(), 1); +} + +=head3 cleanup_private_keys($private_keys, $fabric_config) + +Removes all keys in $private_keys that are not contained in $fabric_config. This +is used for cleaning up the WireGuard keys after applying the SDN configuration. + +=cut + +sub cleanup_private_keys { + my ($private_keys, $fabric_config) = @_; + + my $nodename = PVE::INotify::nodename(); + + $private_keys = private_keys() if !$private_keys; + $fabric_config = PVE::Network::SDN::Fabrics::config(1) if !$fabric_config; + + $private_keys->cleanup($fabric_config); + write_private_keys($private_keys); +} + +=head3 generate_wireguard_config($apply) + +Generates the WireGuard configuration files on the current node, based on the +current running SDN configuration. If $apply is passed, then the WireGuard +configuration will be applied via the syncconf command of wg(8). + +=cut + +sub generate_wireguard_config { + my ($apply) = @_; + + my $nodename = PVE::INotify::nodename(); + + my $fabric_config = PVE::Network::SDN::Fabrics::config(1); + my $private_keys = private_keys(); + + my $raw_config = $fabric_config->get_wireguard_raw_config($nodename, $private_keys); + + write_wireguard_config($raw_config, $apply); +} + +=head3 write_wireguard_config($raw_config) + +Takes a raw_config of the following format: + + interface_name => "" + +and generates the respective configuration files in $wireguard_config_folder. If +$apply is set, then the configuration will be synced via the syncconf command of +wg(8). This requires the interfaces to exist on the node, otherwise the wg +command will fail. A warning is emitted in that case. + +=cut + +sub write_wireguard_config { + my ($raw_config, $apply) = @_; + + my $code = sub { + for my $interface (keys $raw_config->%*) { + PVE::File::file_set_contents( + "$wireguard_config_folder/$interface.conf", + $raw_config->{$interface}, + 400, + ); + + if ($apply) { + if (!-e "/usr/bin/wg") { + warn + "In order to apply the generated WireGuard configuration the package 'wireguard-tools' needs to be installed.\n"; + return; + } + + eval { + PVE::Tools::run_command( + [ + 'wg', + 'syncconf', + $interface, + "/etc/wireguard/proxmox/$interface.conf", + ], + ); + }; + warn $@ if $@; + } + } + }; + + PVE::Tools::lock_file($local_wireguard_lock, 10, $code); + die $@ if $@; + + return; +} + -- 2.47.3