The raw socket sd_event_source used for DHCP server solicitations
was simply dropped on the floor when creating the new UDP socket
after a lease has been acquired. Clean it up properly so we're
not still listening and responding to events on it.
if (r >= 0) {
client->timeout_resend =
sd_event_source_unref(client->timeout_resend);
+ client->receive_message =
+ sd_event_source_unref(client->receive_message);
+ client->fd = asynchronous_close(client->fd);
if (IN_SET(client->state, DHCP_STATE_REQUESTING,
DHCP_STATE_REBOOTING))