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  */
  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 */