[PATCH proxmox v4 03/31] wireguard: skip serializing preshared_key if unset

[Stefan Hanreich <s.hanreich@proxmox.com>]

Otherwise the generated WireGuard configuration is invalid, because it
contains a line 'PresharedKey=', which trips up wg(8). Avoid this by
skipping serialization for unset preshared keys.

Signed-off-by: Stefan Hanreich <s.hanreich@proxmox.com>
---
 proxmox-wireguard/src/lib.rs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/proxmox-wireguard/src/lib.rs b/proxmox-wireguard/src/lib.rs
index bf6ea8ad..3a6248b2 100644
--- a/proxmox-wireguard/src/lib.rs
+++ b/proxmox-wireguard/src/lib.rs
@@ -142,6 +142,7 @@ pub struct WireGuardPeer {
     /// Additional key preshared between two peers. Adds an additional layer of symmetric-key
     /// cryptography to be mixed into the already existing public-key cryptography, for
     /// post-quantum resistance.
+    #[serde(skip_serializing_if = "Option::is_none")]
     pub preshared_key: Option<PresharedKey>,
     /// List of IPv4/v6 CIDRs from which incoming traffic for this peer is allowed and to which
     /// outgoing traffic for this peer is directed. The catch-all 0.0.0.0/0 may be specified for
-- 
2.47.3