1 /* SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause) */
2 /*
3 * linux/can/core.h
4 *
5 * Protoypes 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 CAN_VERSION "20170425"
22
23 /* increment this number each time you change some user-space interface */
24 #define CAN_ABI_VERSION "9"
25
26 #define CAN_VERSION_STRING "rev " CAN_VERSION " abi " CAN_ABI_VERSION
27
28 #define DNAME(dev) ((dev) ? (dev)->name : "any")
29
30 /**
31 * struct can_proto - CAN protocol structure
32 * @type: type argument in socket() syscall, e.g. SOCK_DGRAM.
33 * @protocol: protocol number in socket() syscall.
34 * @ops: pointer to struct proto_ops for sock->ops.
35 * @prot: pointer to struct proto structure.
36 */
37 struct can_proto {
38 int type;
39 int protocol;
40 const struct proto_ops *ops;
41 struct proto *prot;
42 };
43
44 /* required_size
45 * macro to find the minimum size of a struct
46 * that includes a requested member
47 */
48 #define CAN_REQUIRED_SIZE(struct_type, member) \
49 (offsetof(typeof(struct_type), member) + \
50 sizeof(((typeof(struct_type) *)(NULL))->member))
51
52 /* function prototypes for the CAN networklayer core (af_can.c) */
53
54 extern int can_proto_register(const struct can_proto *cp);
55 extern void can_proto_unregister(const struct can_proto *cp);
56
57 int can_rx_register(struct net *net, struct net_device *dev,
58 canid_t can_id, canid_t mask,
59 void (*func)(struct sk_buff *, void *),
60 void *data, char *ident, struct sock *sk);
61
62 extern void can_rx_unregister(struct net *net, struct net_device *dev,
63 canid_t can_id, canid_t mask,
64 void (*func)(struct sk_buff *, void *),
65 void *data);
66
67 extern int can_send(struct sk_buff *skb, int loop);
68 void can_sock_destruct(struct sock *sk);
69
70 #endif /* !_CAN_CORE_H */