6e4cb2b9ab
CAN stands for Controller Area Network, a broadcast network used in automation and automotive fields. For example, the NMEA2000 standard developped for marine devices uses a CAN network as the link layer. This is an implementation of the linux socketcan API: https://www.kernel.org/doc/Documentation/networking/can.txt you can also see can(4). This adds a new socket family (AF_CAN) and protocol (PF_CAN), as well as the canconfig(8) utility, used to set timing parameter of CAN hardware. Also inclued is a driver for the CAN controller found in the allwinner A20 SoC (I tested it with an Olimex lime2 board, connected with PIC18-based CAN devices). There is also the canloop(4) pseudo-device, which allows to use the socketcan API without CAN hardware. At this time the CANFD part of the linux socketcan API is not implemented. Error frames are not implemented either. But I could get the cansend and canreceive utilities from the canutils package to build and run with minimal changes. tcpudmp(8) can also be used to record frames, which can be decoded with etherreal.
126 lines
4.0 KiB
C
126 lines
4.0 KiB
C
/* $NetBSD: netisr.h,v 1.45 2017/05/27 21:02:56 bouyer Exp $ */
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/*
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* Copyright (c) 1980, 1986, 1989, 1993
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* The Regents of the University of California. All rights reserved.
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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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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)netisr.h 8.1 (Berkeley) 6/10/93
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*/
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#ifndef _NET_NETISR_H_
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#define _NET_NETISR_H_ /* checked by netisr_dispatch.h */
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/*
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* The networking code runs off software interrupts.
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*
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* You can switch into the network by doing splsoftnet() and return by splx().
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* The software interrupt level for the network is higher than the software
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* level for the clock (so you can enter the network in routines called
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* at timeout time).
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*
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* The routine to request a network software interrupt, setsoftnet(),
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* is defined in the machine-specific include files.
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*/
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#if defined(_KERNEL)
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#if defined(_KERNEL_OPT)
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#include "opt_inet.h"
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#include "opt_atalk.h"
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#include "opt_mpls.h"
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#include "opt_natm.h"
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#include "opt_can.h"
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#include "arp.h"
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#endif /* defined(_KERNEL_OPT) */
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#if !defined(_LOCORE)
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/* XXX struct sockaddr defn for for if.h, if_arp.h */
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#include <sys/socket.h>
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/*
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* XXX IFNAMSIZE for if_ppp.h, natm.h; struct ifnet decl for in6.h, in.h;
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* XXX struct mbuf decl for in6.h, in.h, route.h (via in_var.h).
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*/
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#include <net/if.h>
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#ifdef INET
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#include <netinet/in.h>
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#include <netinet/ip_var.h>
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#if NARP > 0
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#include <netinet/if_inarp.h>
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#endif
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#endif
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#ifdef INET6
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# ifndef INET
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# include <netinet/in.h>
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# endif
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#include <netinet/ip6.h>
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#include <netinet6/ip6_var.h>
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#endif
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#ifdef MPLS
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#include <netmpls/mpls_var.h>
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#endif
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#ifdef NATM
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#include <netnatm/natm.h>
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#endif
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#ifdef NETATALK
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#include <netatalk/at_extern.h>
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#endif
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#ifdef CAN
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#include <netcan/can.h>
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#include <netcan/can_var.h>
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#endif
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#endif /* !defined(_LOCORE) */
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#endif /* defined(_KERNEL) */
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/*
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* Each ``pup-level-1'' input queue has a bit in a ``netisr'' status
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* word which is used to de-multiplex a single software
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* interrupt used for scheduling the network code to calls
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* on the lowest level routine of each protocol.
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*/
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#define NETISR_IP 2 /* same as AF_INET */
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#define NETISR_CCITT 10 /* same as AF_CCITT */
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#define NETISR_ATALK 16 /* same as AF_APPLETALK */
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#define NETISR_IPV6 24 /* same as AF_INET6 */
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#define NETISR_ISDN 26 /* same as AF_E164 */
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#define NETISR_NATM 27 /* same as AF_NATM */
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#define NETISR_ARP 28 /* same as AF_ARP */
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#define NETISR_MPLS 33 /* same as AF_MPLS */
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#define NETISR_CAN 35 /* same as AF_CAN */
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#define NETISR_MAX AF_MAX
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#if !defined(_LOCORE) && defined(_KERNEL)
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/* XXX Legacy netisr support. */
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void schednetisr(int);
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#endif
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#endif /* !_NET_NETISR_H_ */
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