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