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