64 lines · c
1/* SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause) */2/*3 * linux/can/core.h4 *5 * Prototypes and definitions for CAN protocol modules using the PF_CAN core6 *7 * Authors: Oliver Hartkopp <oliver.hartkopp@volkswagen.de>8 * Urs Thuermann <urs.thuermann@volkswagen.de>9 * Copyright (c) 2002-2017 Volkswagen Group Electronic Research10 * All rights reserved.11 *12 */13 14#ifndef _CAN_CORE_H15#define _CAN_CORE_H16 17#include <linux/can.h>18#include <linux/skbuff.h>19#include <linux/netdevice.h>20 21#define DNAME(dev) ((dev) ? (dev)->name : "any")22 23/**24 * struct can_proto - CAN protocol structure25 * @type: type argument in socket() syscall, e.g. SOCK_DGRAM.26 * @protocol: protocol number in socket() syscall.27 * @ops: pointer to struct proto_ops for sock->ops.28 * @prot: pointer to struct proto structure.29 */30struct can_proto {31 int type;32 int protocol;33 const struct proto_ops *ops;34 struct proto *prot;35};36 37/* required_size38 * macro to find the minimum size of a struct39 * that includes a requested member40 */41#define CAN_REQUIRED_SIZE(struct_type, member) \42 (offsetof(typeof(struct_type), member) + \43 sizeof(((typeof(struct_type) *)(NULL))->member))44 45/* function prototypes for the CAN networklayer core (af_can.c) */46 47extern int can_proto_register(const struct can_proto *cp);48extern void can_proto_unregister(const struct can_proto *cp);49 50int can_rx_register(struct net *net, struct net_device *dev,51 canid_t can_id, canid_t mask,52 void (*func)(struct sk_buff *, void *),53 void *data, char *ident, struct sock *sk);54 55extern void can_rx_unregister(struct net *net, struct net_device *dev,56 canid_t can_id, canid_t mask,57 void (*func)(struct sk_buff *, void *),58 void *data);59 60extern int can_send(struct sk_buff *skb, int loop);61void can_sock_destruct(struct sock *sk);62 63#endif /* !_CAN_CORE_H */64