/* $NetBSD: can_pcb.h,v 1.2 2017/05/27 21:02:56 bouyer Exp $ */ /*- * Copyright (c) 2003, 2017 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Robert Swindells and Manuel Bouyer * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ #ifndef _NETCAN_CAN_PCB_H_ #define _NETCAN_CAN_PCB_H_ #include <sys/queue.h> /* * Common structure pcb for can protocol implementation. * Here are stored pointers to local and foreign host table * entries, local and foreign socket numbers, and pointers * up (to a socket structure) and down (to a protocol-specific) * control block. */ struct canpcbpolicy; struct canpcb { LIST_ENTRY(canpcb) canp_hash; LIST_ENTRY(canpcb) canp_lhash; TAILQ_ENTRY(canpcb) canp_queue; kmutex_t canp_mtx; /* protect states and refcount */ int canp_state; int canp_flags; struct socket *canp_socket; /* back pointer to socket */ struct ifnet *canp_ifp; /* interface this socket is bound to */ struct canpcbtable *canp_table; struct can_filter *canp_filters; /* filter array */ int canp_nfilters; /* size of canp_filters */ int canp_refcount; }; LIST_HEAD(canpcbhead, canpcb); TAILQ_HEAD(canpcbqueue, canpcb); struct canpcbtable { struct canpcbqueue canpt_queue; struct canpcbhead *canpt_bindhashtbl; struct canpcbhead *canpt_connecthashtbl; u_long canpt_bindhash; u_long canpt_connecthash; }; /* states in canp_state: */ #define CANP_DETACHED 0 #define CANP_ATTACHED 1 #define CANP_BOUND 2 #define CANP_CONNECTED 3 /* flags in canp_flags: */ #define CANP_NO_LOOPBACK 0x0001 /* local loopback disabled */ #define CANP_RECEIVE_OWN 0x0002 /* receive own message */ #define sotocanpcb(so) ((struct canpcb *)(so)->so_pcb) #ifdef _KERNEL void can_losing(struct canpcb *); int can_pcballoc (struct socket *, void *); int can_pcbbind(void *, struct sockaddr_can *, struct lwp *); int can_pcbconnect(void *, struct sockaddr_can *); void can_pcbdetach(void *); void can_pcbdisconnect(void *); void can_pcbinit(struct canpcbtable *, int, int); int can_pcbnotify(struct canpcbtable *, u_int32_t, u_int32_t, int, void (*)(struct canpcb *, int)); void can_pcbnotifyall(struct canpcbtable *, u_int32_t, int, void (*)(struct canpcb *, int)); void can_pcbpurgeif0(struct canpcbtable *, struct ifnet *); void can_pcbpurgeif(struct canpcbtable *, struct ifnet *); void can_pcbstate(struct canpcb *, int); void can_setsockaddr(struct canpcb *, struct sockaddr_can *); int can_pcbsetfilter(struct canpcb *, struct can_filter *, int); bool can_pcbfilter(struct canpcb *, struct mbuf *); /* refcount management */ void canp_ref(struct canpcb *); void canp_unref(struct canpcb *); #endif #endif /* _NETCAN_CAN_PCB_H_ */
