core.h 2.02 KB
Newer Older
1
/* SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause) */
2
3
4
5
6
7
8
/*
 * linux/can/core.h
 *
 * Protoypes and definitions for CAN protocol modules using the PF_CAN core
 *
 * Authors: Oliver Hartkopp <oliver.hartkopp@volkswagen.de>
 *          Urs Thuermann   <urs.thuermann@volkswagen.de>
9
 * Copyright (c) 2002-2017 Volkswagen Group Electronic Research
10
11
12
13
 * All rights reserved.
 *
 */

14
15
#ifndef _CAN_CORE_H
#define _CAN_CORE_H
16
17
18
19
20

#include <linux/can.h>
#include <linux/skbuff.h>
#include <linux/netdevice.h>

21
#define CAN_VERSION "20170425"
22
23

/* increment this number each time you change some user-space interface */
24
#define CAN_ABI_VERSION "9"
25
26
27
28
29
30
31
32
33
34
35
36
37

#define CAN_VERSION_STRING "rev " CAN_VERSION " abi " CAN_ABI_VERSION

#define DNAME(dev) ((dev) ? (dev)->name : "any")

/**
 * struct can_proto - CAN protocol structure
 * @type:       type argument in socket() syscall, e.g. SOCK_DGRAM.
 * @protocol:   protocol number in socket() syscall.
 * @ops:        pointer to struct proto_ops for sock->ops.
 * @prot:       pointer to struct proto structure.
 */
struct can_proto {
Oliver Hartkopp's avatar
Oliver Hartkopp committed
38
39
40
41
	int type;
	int protocol;
	const struct proto_ops *ops;
	struct proto *prot;
42
43
};

44
45
46
47
48
49
50
51
/* required_size
 * macro to find the minimum size of a struct
 * that includes a requested member
 */
#define CAN_REQUIRED_SIZE(struct_type, member) \
	(offsetof(typeof(struct_type), member) + \
	 sizeof(((typeof(struct_type) *)(NULL))->member))

52
53
/* function prototypes for the CAN networklayer core (af_can.c) */

54
55
extern int  can_proto_register(const struct can_proto *cp);
extern void can_proto_unregister(const struct can_proto *cp);
56

57
58
int can_rx_register(struct net *net, struct net_device *dev,
		    canid_t can_id, canid_t mask,
59
60
		    void (*func)(struct sk_buff *, void *),
		    void *data, char *ident, struct sock *sk);
61

62
63
extern void can_rx_unregister(struct net *net, struct net_device *dev,
			      canid_t can_id, canid_t mask,
64
65
66
67
			      void (*func)(struct sk_buff *, void *),
			      void *data);

extern int can_send(struct sk_buff *skb, int loop);
68
void can_sock_destruct(struct sock *sk);
69

70
#endif /* !_CAN_CORE_H */