501 	KASSERT(tp->t_fb != &tcp_def_funcblk,  in tcp_switch_back_to_default()
504 	if (tp->t_fb->tfb_tcp_timer_stop_all != NULL)  in tcp_switch_back_to_default()
505 		tp->t_fb->tfb_tcp_timer_stop_all(tp);  in tcp_switch_back_to_default()
514 	if (tfb == tp->t_fb) {  in tcp_switch_back_to_default()
529 			if (tp->t_fb->tfb_tcp_fb_fini != NULL)  in tcp_switch_back_to_default()
530 				(*tp->t_fb->tfb_tcp_fb_fini)(tp, 0);  in tcp_switch_back_to_default()
531 			refcount_release(&tp->t_fb->tfb_refcnt);  in tcp_switch_back_to_default()
533 			tp->t_fb = tfb;  in tcp_switch_back_to_default()
563 	if (tp->t_fb->tfb_tcp_fb_fini != NULL)  in tcp_switch_back_to_default()
564 		(*tp->t_fb->tfb_tcp_fb_fini)(tp, 0);  in tcp_switch_back_to_default()
565 	refcount_release(&tp->t_fb->tfb_refcnt);  in tcp_switch_back_to_default()
567 	tp->t_fb = tfb;  in tcp_switch_back_to_default()
1355 				if (tp == NULL || tp->t_fb != blk)  in deregister_tcp_functions()
2233 		KASSERT(listening_tcb->t_fb != NULL,  in tcp_newtcpcb()
2235 		if (listening_tcb->t_fb->tfb_flags & TCP_FUNC_BEING_REMOVED) {  in tcp_newtcpcb()
2239 		tp->t_fb = listening_tcb->t_fb;  in tcp_newtcpcb()
2241 		tp->t_fb = V_tcp_func_set_ptr;  in tcp_newtcpcb()
2243 	refcount_acquire(&tp->t_fb->tfb_refcnt);  in tcp_newtcpcb()
2244 	KASSERT((tp->t_fb->tfb_flags & TCP_FUNC_BEING_REMOVED) == 0,  in tcp_newtcpcb()
2251 			if (tp->t_fb->tfb_tcp_fb_fini)  in tcp_newtcpcb()
2252 				(*tp->t_fb->tfb_tcp_fb_fini)(tp, 1);  in tcp_newtcpcb()
2253 			refcount_release(&tp->t_fb->tfb_refcnt);  in tcp_newtcpcb()
2264 			if (tp->t_fb->tfb_tcp_fb_fini)  in tcp_newtcpcb()
2265 				(*tp->t_fb->tfb_tcp_fb_fini)(tp, 1);  in tcp_newtcpcb()
2266 			refcount_release(&tp->t_fb->tfb_refcnt);  in tcp_newtcpcb()
2276 		if (tp->t_fb->tfb_tcp_fb_fini)  in tcp_newtcpcb()
2277 			(*tp->t_fb->tfb_tcp_fb_fini)(tp, 1);  in tcp_newtcpcb()
2278 		refcount_release(&tp->t_fb->tfb_refcnt);  in tcp_newtcpcb()
2351 	if (tp->t_fb->tfb_tcp_fb_init) {  in tcp_newtcpcb()
2352 		if ((*tp->t_fb->tfb_tcp_fb_init)(tp, &tp->t_fb_ptr)) {  in tcp_newtcpcb()
2360 			refcount_release(&tp->t_fb->tfb_refcnt);  in tcp_newtcpcb()
2452 	if (tp->t_fb->tfb_tcp_fb_fini)  in tcp_discardcb()
2453 		(*tp->t_fb->tfb_tcp_fb_fini)(tp, 1);  in tcp_discardcb()
2516 	refcount_release(&tp->t_fb->tfb_refcnt);  in tcp_discardcb()
2545 	if (tp->t_fb->tfb_tcp_timer_stop_all != NULL)  in tcp_close()
2546 		tp->t_fb->tfb_tcp_timer_stop_all(tp);  in tcp_close()
3357 	if (tp->t_fb->tfb_tcp_mtu_chg != NULL) {  in tcp_mtudisc()
3364 		tp->t_fb->tfb_tcp_mtu_chg(tp);  in tcp_mtudisc()
4009 	bcopy(tp->t_fb->tfb_tcp_block_name, xt->xt_stack,  in tcp_inptoxtp()