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 | */ |
30 | struct 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 | |
47 | extern int can_proto_register(const struct can_proto *cp); |
48 | extern void can_proto_unregister(const struct can_proto *cp); |
49 | |
50 | int 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 | |
55 | extern 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 | |
60 | extern int can_send(struct sk_buff *skb, int loop); |
61 | void can_sock_destruct(struct sock *sk); |
62 | |
63 | #endif /* !_CAN_CORE_H */ |
64 | |