cregit-Linux how code gets into the kernel

Release 4.12 include/linux/if_frad.h

Directory: include/linux
 * DLCI/FRAD    Definitions for Frame Relay Access Devices.  DLCI devices are
 *              created for each DLCI associated with a FRAD.  The FRAD driver
 *              is not truly a network device, but the lower level device
 *              handler.  This allows other FRAD manufacturers to use the DLCI
 *              code, including its RFC1490 encapsulation alongside the current
 *              implementation for the Sangoma cards.
 * Version:     @(#)if_ifrad.h  0.15    31 Mar 96
 * Author:      Mike McLagan <>
 * Changes:
 *              0.15    Mike McLagan    changed structure defs (packed)
 *                                      re-arranged flags
 *                                      added DLCI_RET vars
 *              This program is free software; you can redistribute it and/or
 *              modify it under the terms of the GNU General Public License
 *              as published by the Free Software Foundation; either version
 *              2 of the License, or (at your option) any later version.
#ifndef _FRAD_H_

#define _FRAD_H_

#include <uapi/linux/if_frad.h>

#if defined(CONFIG_DLCI) || defined(CONFIG_DLCI_MODULE)

/* these are the fields of an RFC 1490 header */

struct frhdr
unsigned char  control;

   /* for IP packets, this can be the NLPID */
unsigned char  pad;

unsigned char  NLPID;
unsigned char  OUI[3];
__be16 PID;

#define IP_NLPID pad 

} __packed;

/* see RFC 1490 for the definition of the following */

#define FRAD_I_UI		0x03

#define FRAD_P_PADDING		0x00

#define FRAD_P_Q933		0x08

#define FRAD_P_SNAP		0x80

#define FRAD_P_CLNP		0x81

#define FRAD_P_IP		0xCC

struct dlci_local
struct net_device      *master;
struct net_device      *slave;
struct dlci_conf       config;
int                    configured;
struct list_head	  list;

   /* callback function */
void              (*receive)(struct sk_buff *skb, struct net_device *);

struct frad_local
   /* devices which this FRAD is slaved to */
struct net_device     *master[CONFIG_DLCI_MAX];
short             dlci[CONFIG_DLCI_MAX];

struct frad_conf  config;
int               configured;	/* has this device been configured */
int               initialized;	/* mem_start, port, irq set ? */

   /* callback functions */
int               (*activate)(struct net_device *, struct net_device *);
int               (*deactivate)(struct net_device *, struct net_device *);
int               (*assoc)(struct net_device *, struct net_device *);
int               (*deassoc)(struct net_device *, struct net_device *);
int               (*dlci_conf)(struct net_device *, struct net_device *, int get);

   /* fields that are used by the Sangoma SDLA cards */
struct timer_list timer;
int               type;		/* adapter type */
int               state;		/* state of the S502/8 control latch */
int               buffer;		/* current buffer for S508 firmware */


extern void dlci_ioctl_set(int (*hook)(unsigned int, void __user *));


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Directory: include/linux
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