pdu_receive_proxy
void (*pdu_receive_proxy)(struct pdu *);
return (conn->conn_ops->pdu_receive_proxy(pdu));
static void pdu_receive_proxy(struct pdu *pdu);
.pdu_receive_proxy = pdu_receive_proxy,
.pdu_receive_proxy = nullptr,
static void pdu_receive_proxy(struct pdu *pdu);
.pdu_receive_proxy = pdu_receive_proxy,