sd-dhcp-server: allow to send header only message

If we receive a header only message, and the server is running in relay
mode, then the assertion was triggered.

Fixes #26151.

diff --git a/src/libsystemd-network/sd-dhcp-server.c b/src/libsystemd-network/sd-dhcp-server.c
index b5aff7d4fab54d8e54c2907e824ab68be7f83496..7d84aaf6ab9ba2d62cb7d6ccbf1c7b6b60f487eb 100644 (file)
--- a/src/libsystemd-network/sd-dhcp-server.c
+++ b/src/libsystemd-network/sd-dhcp-server.c
@@ -390,7 +390,7 @@ static int dhcp_server_send_udp(sd_dhcp_server *server, be32_t destination,
         assert(server);
         assert(server->fd >= 0);
         assert(message);
-        assert(len > sizeof(DHCPMessage));
+        assert(len >= sizeof(DHCPMessage));
 
         if (server->bind_to_interface) {
                 msg.msg_control = &control;