LXR linux/include/linux/can/core.h

   1/* SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause) */
   2/*
   3 * linux/can/core.h
   4 *
   5 * Prototypes and definitions for CAN protocol modules using the PF_CAN core
   6 *
   7 * Authors: Oliver Hartkopp <oliver.hartkopp@volkswagen.de>
   8 *          Urs Thuermann   <urs.thuermann@volkswagen.de>
   9 * Copyright (c) 2002-2017 Volkswagen Group Electronic Research
  10 * All rights reserved.
  11 *
  12 */
  13
  14#ifndef _CAN_CORE_H
  15#define _CAN_CORE_H
  16
  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 structure
  25 * @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_size
  38 * macro to find the minimum size of a struct
  39 * that includes a requested member
  40 */
  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