[CAN]: Add raw protocol
This patch adds the CAN raw protocol. Signed-off-by: Oliver Hartkopp <oliver.hartkopp@volkswagen.de> Signed-off-by: Urs Thuermann <urs.thuermann@volkswagen.de> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Oliver Hartkopp
David S. Miller
parent
0d66548a10
commit
c18ce101f2
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@ -0,0 +1,31 @@
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/*
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* linux/can/raw.h
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*
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* Definitions for raw CAN sockets
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*
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* Authors: Oliver Hartkopp <oliver.hartkopp@volkswagen.de>
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* Urs Thuermann <urs.thuermann@volkswagen.de>
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* Copyright (c) 2002-2007 Volkswagen Group Electronic Research
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* All rights reserved.
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*
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* Send feedback to <socketcan-users@lists.berlios.de>
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*
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*/
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#ifndef CAN_RAW_H
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#define CAN_RAW_H
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#include <linux/can.h>
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#define SOL_CAN_RAW (SOL_CAN_BASE + CAN_RAW)
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/* for socket options affecting the socket (not the global system) */
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enum {
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CAN_RAW_FILTER = 1, /* set 0 .. n can_filter(s) */
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CAN_RAW_ERR_FILTER, /* set filter for error frames */
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CAN_RAW_LOOPBACK, /* local loopback (default:on) */
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CAN_RAW_RECV_OWN_MSGS /* receive my own msgs (default:off) */
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};
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#endif
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@ -15,3 +15,14 @@ menuconfig CAN
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If you want CAN support you should say Y here and also to the
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specific driver for your controller(s) below.
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config CAN_RAW
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tristate "Raw CAN Protocol (raw access with CAN-ID filtering)"
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depends on CAN
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default N
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---help---
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The raw CAN protocol option offers access to the CAN bus via
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the BSD socket API. You probably want to use the raw socket in
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most cases where no higher level protocol is being used. The raw
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socket has several filter options e.g. ID masking / error frames.
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To receive/send raw CAN messages, use AF_CAN with protocol CAN_RAW.
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@ -4,3 +4,6 @@
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obj-$(CONFIG_CAN) += can.o
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can-objs := af_can.o proc.o
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obj-$(CONFIG_CAN_RAW) += can-raw.o
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can-raw-objs := raw.o
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@ -0,0 +1,763 @@
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/*
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* raw.c - Raw sockets for protocol family CAN
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*
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* Copyright (c) 2002-2007 Volkswagen Group Electronic Research
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* 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 Volkswagen 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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* Alternatively, provided that this notice is retained in full, this
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* software may be distributed under the terms of the GNU General
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* Public License ("GPL") version 2, in which case the provisions of the
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* GPL apply INSTEAD OF those given above.
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*
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* The provided data structures and external interfaces from this code
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* are not restricted to be used by modules with a GPL compatible license.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
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* DAMAGE.
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*
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* Send feedback to <socketcan-users@lists.berlios.de>
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*
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/uio.h>
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#include <linux/net.h>
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#include <linux/netdevice.h>
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#include <linux/socket.h>
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#include <linux/if_arp.h>
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#include <linux/skbuff.h>
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#include <linux/can.h>
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#include <linux/can/core.h>
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#include <linux/can/raw.h>
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#include <net/sock.h>
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#include <net/net_namespace.h>
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#define CAN_RAW_VERSION CAN_VERSION
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static __initdata const char banner[] =
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KERN_INFO "can: raw protocol (rev " CAN_RAW_VERSION ")\n";
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MODULE_DESCRIPTION("PF_CAN raw protocol");
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MODULE_LICENSE("Dual BSD/GPL");
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MODULE_AUTHOR("Urs Thuermann <urs.thuermann@volkswagen.de>");
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#define MASK_ALL 0
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/*
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* A raw socket has a list of can_filters attached to it, each receiving
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* the CAN frames matching that filter. If the filter list is empty,
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* no CAN frames will be received by the socket. The default after
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* opening the socket, is to have one filter which receives all frames.
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* The filter list is allocated dynamically with the exception of the
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* list containing only one item. This common case is optimized by
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* storing the single filter in dfilter, to avoid using dynamic memory.
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*/
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struct raw_sock {
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struct sock sk;
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int bound;
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int ifindex;
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struct notifier_block notifier;
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int loopback;
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int recv_own_msgs;
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int count; /* number of active filters */
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struct can_filter dfilter; /* default/single filter */
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struct can_filter *filter; /* pointer to filter(s) */
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can_err_mask_t err_mask;
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};
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static inline struct raw_sock *raw_sk(const struct sock *sk)
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{
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return (struct raw_sock *)sk;
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}
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static void raw_rcv(struct sk_buff *skb, void *data)
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{
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struct sock *sk = (struct sock *)data;
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struct raw_sock *ro = raw_sk(sk);
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struct sockaddr_can *addr;
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int error;
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if (!ro->recv_own_msgs) {
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/* check the received tx sock reference */
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if (skb->sk == sk) {
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kfree_skb(skb);
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return;
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}
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}
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/*
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* Put the datagram to the queue so that raw_recvmsg() can
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* get it from there. We need to pass the interface index to
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* raw_recvmsg(). We pass a whole struct sockaddr_can in skb->cb
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* containing the interface index.
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*/
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BUILD_BUG_ON(sizeof(skb->cb) < sizeof(struct sockaddr_can));
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addr = (struct sockaddr_can *)skb->cb;
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memset(addr, 0, sizeof(*addr));
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addr->can_family = AF_CAN;
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addr->can_ifindex = skb->dev->ifindex;
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error = sock_queue_rcv_skb(sk, skb);
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if (error < 0)
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kfree_skb(skb);
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}
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static int raw_enable_filters(struct net_device *dev, struct sock *sk,
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struct can_filter *filter,
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int count)
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{
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int err = 0;
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int i;
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for (i = 0; i < count; i++) {
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err = can_rx_register(dev, filter[i].can_id,
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filter[i].can_mask,
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raw_rcv, sk, "raw");
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if (err) {
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/* clean up successfully registered filters */
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while (--i >= 0)
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can_rx_unregister(dev, filter[i].can_id,
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filter[i].can_mask,
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raw_rcv, sk);
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break;
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}
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}
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return err;
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}
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static int raw_enable_errfilter(struct net_device *dev, struct sock *sk,
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can_err_mask_t err_mask)
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{
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int err = 0;
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if (err_mask)
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err = can_rx_register(dev, 0, err_mask | CAN_ERR_FLAG,
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raw_rcv, sk, "raw");
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return err;
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}
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static void raw_disable_filters(struct net_device *dev, struct sock *sk,
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struct can_filter *filter,
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int count)
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{
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int i;
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for (i = 0; i < count; i++)
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can_rx_unregister(dev, filter[i].can_id, filter[i].can_mask,
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raw_rcv, sk);
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}
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static inline void raw_disable_errfilter(struct net_device *dev,
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struct sock *sk,
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can_err_mask_t err_mask)
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{
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if (err_mask)
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can_rx_unregister(dev, 0, err_mask | CAN_ERR_FLAG,
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raw_rcv, sk);
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}
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static inline void raw_disable_allfilters(struct net_device *dev,
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struct sock *sk)
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{
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struct raw_sock *ro = raw_sk(sk);
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raw_disable_filters(dev, sk, ro->filter, ro->count);
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raw_disable_errfilter(dev, sk, ro->err_mask);
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}
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static int raw_enable_allfilters(struct net_device *dev, struct sock *sk)
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{
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struct raw_sock *ro = raw_sk(sk);
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int err;
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err = raw_enable_filters(dev, sk, ro->filter, ro->count);
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if (!err) {
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err = raw_enable_errfilter(dev, sk, ro->err_mask);
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if (err)
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raw_disable_filters(dev, sk, ro->filter, ro->count);
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}
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return err;
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}
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static int raw_notifier(struct notifier_block *nb,
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unsigned long msg, void *data)
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{
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struct net_device *dev = (struct net_device *)data;
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struct raw_sock *ro = container_of(nb, struct raw_sock, notifier);
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struct sock *sk = &ro->sk;
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if (dev->nd_net != &init_net)
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return NOTIFY_DONE;
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if (dev->type != ARPHRD_CAN)
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return NOTIFY_DONE;
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if (ro->ifindex != dev->ifindex)
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return NOTIFY_DONE;
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switch (msg) {
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case NETDEV_UNREGISTER:
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lock_sock(sk);
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/* remove current filters & unregister */
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if (ro->bound)
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raw_disable_allfilters(dev, sk);
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if (ro->count > 1)
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kfree(ro->filter);
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ro->ifindex = 0;
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ro->bound = 0;
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ro->count = 0;
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release_sock(sk);
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sk->sk_err = ENODEV;
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if (!sock_flag(sk, SOCK_DEAD))
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sk->sk_error_report(sk);
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break;
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case NETDEV_DOWN:
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sk->sk_err = ENETDOWN;
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if (!sock_flag(sk, SOCK_DEAD))
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sk->sk_error_report(sk);
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break;
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}
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return NOTIFY_DONE;
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}
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static int raw_init(struct sock *sk)
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{
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struct raw_sock *ro = raw_sk(sk);
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ro->bound = 0;
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ro->ifindex = 0;
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/* set default filter to single entry dfilter */
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ro->dfilter.can_id = 0;
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ro->dfilter.can_mask = MASK_ALL;
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ro->filter = &ro->dfilter;
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ro->count = 1;
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/* set default loopback behaviour */
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ro->loopback = 1;
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ro->recv_own_msgs = 0;
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/* set notifier */
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ro->notifier.notifier_call = raw_notifier;
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register_netdevice_notifier(&ro->notifier);
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return 0;
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}
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static int raw_release(struct socket *sock)
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{
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struct sock *sk = sock->sk;
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struct raw_sock *ro = raw_sk(sk);
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unregister_netdevice_notifier(&ro->notifier);
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lock_sock(sk);
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/* remove current filters & unregister */
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if (ro->bound) {
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if (ro->ifindex) {
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struct net_device *dev;
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dev = dev_get_by_index(&init_net, ro->ifindex);
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if (dev) {
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raw_disable_allfilters(dev, sk);
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dev_put(dev);
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}
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} else
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raw_disable_allfilters(NULL, sk);
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}
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if (ro->count > 1)
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kfree(ro->filter);
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ro->ifindex = 0;
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ro->bound = 0;
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ro->count = 0;
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release_sock(sk);
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sock_put(sk);
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return 0;
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}
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static int raw_bind(struct socket *sock, struct sockaddr *uaddr, int len)
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{
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struct sockaddr_can *addr = (struct sockaddr_can *)uaddr;
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struct sock *sk = sock->sk;
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struct raw_sock *ro = raw_sk(sk);
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int ifindex;
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int err = 0;
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int notify_enetdown = 0;
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if (len < sizeof(*addr))
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return -EINVAL;
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lock_sock(sk);
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if (ro->bound && addr->can_ifindex == ro->ifindex)
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goto out;
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if (addr->can_ifindex) {
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struct net_device *dev;
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dev = dev_get_by_index(&init_net, addr->can_ifindex);
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if (!dev) {
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err = -ENODEV;
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goto out;
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}
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if (dev->type != ARPHRD_CAN) {
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dev_put(dev);
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err = -ENODEV;
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goto out;
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}
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if (!(dev->flags & IFF_UP))
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notify_enetdown = 1;
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ifindex = dev->ifindex;
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/* filters set by default/setsockopt */
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err = raw_enable_allfilters(dev, sk);
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dev_put(dev);
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} else {
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ifindex = 0;
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/* filters set by default/setsockopt */
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err = raw_enable_allfilters(NULL, sk);
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}
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if (!err) {
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if (ro->bound) {
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/* unregister old filters */
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if (ro->ifindex) {
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struct net_device *dev;
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dev = dev_get_by_index(&init_net, ro->ifindex);
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if (dev) {
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raw_disable_allfilters(dev, sk);
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dev_put(dev);
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}
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} else
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raw_disable_allfilters(NULL, sk);
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}
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ro->ifindex = ifindex;
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ro->bound = 1;
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}
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out:
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release_sock(sk);
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if (notify_enetdown) {
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sk->sk_err = ENETDOWN;
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if (!sock_flag(sk, SOCK_DEAD))
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sk->sk_error_report(sk);
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}
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return err;
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}
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static int raw_getname(struct socket *sock, struct sockaddr *uaddr,
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int *len, int peer)
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{
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struct sockaddr_can *addr = (struct sockaddr_can *)uaddr;
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struct sock *sk = sock->sk;
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struct raw_sock *ro = raw_sk(sk);
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if (peer)
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return -EOPNOTSUPP;
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addr->can_family = AF_CAN;
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addr->can_ifindex = ro->ifindex;
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*len = sizeof(*addr);
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return 0;
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}
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static int raw_setsockopt(struct socket *sock, int level, int optname,
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char __user *optval, int optlen)
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{
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struct sock *sk = sock->sk;
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struct raw_sock *ro = raw_sk(sk);
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struct can_filter *filter = NULL; /* dyn. alloc'ed filters */
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struct can_filter sfilter; /* single filter */
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struct net_device *dev = NULL;
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can_err_mask_t err_mask = 0;
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int count = 0;
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int err = 0;
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if (level != SOL_CAN_RAW)
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return -EINVAL;
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if (optlen < 0)
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return -EINVAL;
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switch (optname) {
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case CAN_RAW_FILTER:
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if (optlen % sizeof(struct can_filter) != 0)
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return -EINVAL;
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count = optlen / sizeof(struct can_filter);
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if (count > 1) {
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/* filter does not fit into dfilter => alloc space */
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filter = kmalloc(optlen, GFP_KERNEL);
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if (!filter)
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return -ENOMEM;
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err = copy_from_user(filter, optval, optlen);
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if (err) {
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kfree(filter);
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return err;
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}
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} else if (count == 1) {
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err = copy_from_user(&sfilter, optval, optlen);
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if (err)
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return err;
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}
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lock_sock(sk);
|
||||
|
||||
if (ro->bound && ro->ifindex)
|
||||
dev = dev_get_by_index(&init_net, ro->ifindex);
|
||||
|
||||
if (ro->bound) {
|
||||
/* (try to) register the new filters */
|
||||
if (count == 1)
|
||||
err = raw_enable_filters(dev, sk, &sfilter, 1);
|
||||
else
|
||||
err = raw_enable_filters(dev, sk, filter,
|
||||
count);
|
||||
if (err) {
|
||||
if (count > 1)
|
||||
kfree(filter);
|
||||
|
||||
goto out_fil;
|
||||
}
|
||||
|
||||
/* remove old filter registrations */
|
||||
raw_disable_filters(dev, sk, ro->filter, ro->count);
|
||||
}
|
||||
|
||||
/* remove old filter space */
|
||||
if (ro->count > 1)
|
||||
kfree(ro->filter);
|
||||
|
||||
/* link new filters to the socket */
|
||||
if (count == 1) {
|
||||
/* copy filter data for single filter */
|
||||
ro->dfilter = sfilter;
|
||||
filter = &ro->dfilter;
|
||||
}
|
||||
ro->filter = filter;
|
||||
ro->count = count;
|
||||
|
||||
out_fil:
|
||||
if (dev)
|
||||
dev_put(dev);
|
||||
|
||||
release_sock(sk);
|
||||
|
||||
break;
|
||||
|
||||
case CAN_RAW_ERR_FILTER:
|
||||
if (optlen != sizeof(err_mask))
|
||||
return -EINVAL;
|
||||
|
||||
err = copy_from_user(&err_mask, optval, optlen);
|
||||
if (err)
|
||||
return err;
|
||||
|
||||
err_mask &= CAN_ERR_MASK;
|
||||
|
||||
lock_sock(sk);
|
||||
|
||||
if (ro->bound && ro->ifindex)
|
||||
dev = dev_get_by_index(&init_net, ro->ifindex);
|
||||
|
||||
/* remove current error mask */
|
||||
if (ro->bound) {
|
||||
/* (try to) register the new err_mask */
|
||||
err = raw_enable_errfilter(dev, sk, err_mask);
|
||||
|
||||
if (err)
|
||||
goto out_err;
|
||||
|
||||
/* remove old err_mask registration */
|
||||
raw_disable_errfilter(dev, sk, ro->err_mask);
|
||||
}
|
||||
|
||||
/* link new err_mask to the socket */
|
||||
ro->err_mask = err_mask;
|
||||
|
||||
out_err:
|
||||
if (dev)
|
||||
dev_put(dev);
|
||||
|
||||
release_sock(sk);
|
||||
|
||||
break;
|
||||
|
||||
case CAN_RAW_LOOPBACK:
|
||||
if (optlen != sizeof(ro->loopback))
|
||||
return -EINVAL;
|
||||
|
||||
err = copy_from_user(&ro->loopback, optval, optlen);
|
||||
|
||||
break;
|
||||
|
||||
case CAN_RAW_RECV_OWN_MSGS:
|
||||
if (optlen != sizeof(ro->recv_own_msgs))
|
||||
return -EINVAL;
|
||||
|
||||
err = copy_from_user(&ro->recv_own_msgs, optval, optlen);
|
||||
|
||||
break;
|
||||
|
||||
default:
|
||||
return -ENOPROTOOPT;
|
||||
}
|
||||
return err;
|
||||
}
|
||||
|
||||
static int raw_getsockopt(struct socket *sock, int level, int optname,
|
||||
char __user *optval, int __user *optlen)
|
||||
{
|
||||
struct sock *sk = sock->sk;
|
||||
struct raw_sock *ro = raw_sk(sk);
|
||||
int len;
|
||||
void *val;
|
||||
int err = 0;
|
||||
|
||||
if (level != SOL_CAN_RAW)
|
||||
return -EINVAL;
|
||||
if (get_user(len, optlen))
|
||||
return -EFAULT;
|
||||
if (len < 0)
|
||||
return -EINVAL;
|
||||
|
||||
switch (optname) {
|
||||
|
||||
case CAN_RAW_FILTER:
|
||||
lock_sock(sk);
|
||||
if (ro->count > 0) {
|
||||
int fsize = ro->count * sizeof(struct can_filter);
|
||||
if (len > fsize)
|
||||
len = fsize;
|
||||
err = copy_to_user(optval, ro->filter, len);
|
||||
} else
|
||||
len = 0;
|
||||
release_sock(sk);
|
||||
|
||||
if (!err)
|
||||
err = put_user(len, optlen);
|
||||
return err;
|
||||
|
||||
case CAN_RAW_ERR_FILTER:
|
||||
if (len > sizeof(can_err_mask_t))
|
||||
len = sizeof(can_err_mask_t);
|
||||
val = &ro->err_mask;
|
||||
break;
|
||||
|
||||
case CAN_RAW_LOOPBACK:
|
||||
if (len > sizeof(int))
|
||||
len = sizeof(int);
|
||||
val = &ro->loopback;
|
||||
break;
|
||||
|
||||
case CAN_RAW_RECV_OWN_MSGS:
|
||||
if (len > sizeof(int))
|
||||
len = sizeof(int);
|
||||
val = &ro->recv_own_msgs;
|
||||
break;
|
||||
|
||||
default:
|
||||
return -ENOPROTOOPT;
|
||||
}
|
||||
|
||||
if (put_user(len, optlen))
|
||||
return -EFAULT;
|
||||
if (copy_to_user(optval, val, len))
|
||||
return -EFAULT;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int raw_sendmsg(struct kiocb *iocb, struct socket *sock,
|
||||
struct msghdr *msg, size_t size)
|
||||
{
|
||||
struct sock *sk = sock->sk;
|
||||
struct raw_sock *ro = raw_sk(sk);
|
||||
struct sk_buff *skb;
|
||||
struct net_device *dev;
|
||||
int ifindex;
|
||||
int err;
|
||||
|
||||
if (msg->msg_name) {
|
||||
struct sockaddr_can *addr =
|
||||
(struct sockaddr_can *)msg->msg_name;
|
||||
|
||||
if (addr->can_family != AF_CAN)
|
||||
return -EINVAL;
|
||||
|
||||
ifindex = addr->can_ifindex;
|
||||
} else
|
||||
ifindex = ro->ifindex;
|
||||
|
||||
dev = dev_get_by_index(&init_net, ifindex);
|
||||
if (!dev)
|
||||
return -ENXIO;
|
||||
|
||||
skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT,
|
||||
&err);
|
||||
if (!skb) {
|
||||
dev_put(dev);
|
||||
return err;
|
||||
}
|
||||
|
||||
err = memcpy_fromiovec(skb_put(skb, size), msg->msg_iov, size);
|
||||
if (err < 0) {
|
||||
kfree_skb(skb);
|
||||
dev_put(dev);
|
||||
return err;
|
||||
}
|
||||
skb->dev = dev;
|
||||
skb->sk = sk;
|
||||
|
||||
err = can_send(skb, ro->loopback);
|
||||
|
||||
dev_put(dev);
|
||||
|
||||
if (err)
|
||||
return err;
|
||||
|
||||
return size;
|
||||
}
|
||||
|
||||
static int raw_recvmsg(struct kiocb *iocb, struct socket *sock,
|
||||
struct msghdr *msg, size_t size, int flags)
|
||||
{
|
||||
struct sock *sk = sock->sk;
|
||||
struct sk_buff *skb;
|
||||
int error = 0;
|
||||
int noblock;
|
||||
|
||||
noblock = flags & MSG_DONTWAIT;
|
||||
flags &= ~MSG_DONTWAIT;
|
||||
|
||||
skb = skb_recv_datagram(sk, flags, noblock, &error);
|
||||
if (!skb)
|
||||
return error;
|
||||
|
||||
if (size < skb->len)
|
||||
msg->msg_flags |= MSG_TRUNC;
|
||||
else
|
||||
size = skb->len;
|
||||
|
||||
error = memcpy_toiovec(msg->msg_iov, skb->data, size);
|
||||
if (error < 0) {
|
||||
skb_free_datagram(sk, skb);
|
||||
return error;
|
||||
}
|
||||
|
||||
sock_recv_timestamp(msg, sk, skb);
|
||||
|
||||
if (msg->msg_name) {
|
||||
msg->msg_namelen = sizeof(struct sockaddr_can);
|
||||
memcpy(msg->msg_name, skb->cb, msg->msg_namelen);
|
||||
}
|
||||
|
||||
skb_free_datagram(sk, skb);
|
||||
|
||||
return size;
|
||||
}
|
||||
|
||||
static struct proto_ops raw_ops __read_mostly = {
|
||||
.family = PF_CAN,
|
||||
.release = raw_release,
|
||||
.bind = raw_bind,
|
||||
.connect = sock_no_connect,
|
||||
.socketpair = sock_no_socketpair,
|
||||
.accept = sock_no_accept,
|
||||
.getname = raw_getname,
|
||||
.poll = datagram_poll,
|
||||
.ioctl = NULL, /* use can_ioctl() from af_can.c */
|
||||
.listen = sock_no_listen,
|
||||
.shutdown = sock_no_shutdown,
|
||||
.setsockopt = raw_setsockopt,
|
||||
.getsockopt = raw_getsockopt,
|
||||
.sendmsg = raw_sendmsg,
|
||||
.recvmsg = raw_recvmsg,
|
||||
.mmap = sock_no_mmap,
|
||||
.sendpage = sock_no_sendpage,
|
||||
};
|
||||
|
||||
static struct proto raw_proto __read_mostly = {
|
||||
.name = "CAN_RAW",
|
||||
.owner = THIS_MODULE,
|
||||
.obj_size = sizeof(struct raw_sock),
|
||||
.init = raw_init,
|
||||
};
|
||||
|
||||
static struct can_proto raw_can_proto __read_mostly = {
|
||||
.type = SOCK_RAW,
|
||||
.protocol = CAN_RAW,
|
||||
.capability = -1,
|
||||
.ops = &raw_ops,
|
||||
.prot = &raw_proto,
|
||||
};
|
||||
|
||||
static __init int raw_module_init(void)
|
||||
{
|
||||
int err;
|
||||
|
||||
printk(banner);
|
||||
|
||||
err = can_proto_register(&raw_can_proto);
|
||||
if (err < 0)
|
||||
printk(KERN_ERR "can: registration of raw protocol failed\n");
|
||||
|
||||
return err;
|
||||
}
|
||||
|
||||
static __exit void raw_module_exit(void)
|
||||
{
|
||||
can_proto_unregister(&raw_can_proto);
|
||||
}
|
||||
|
||||
module_init(raw_module_init);
|
||||
module_exit(raw_module_exit);
|
||||
Loading…
Reference in New Issue