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Release 4.12 include/linux/hdlc.h

Directory: include/linux
 * Generic HDLC support routines for Linux
 * Copyright (C) 1999-2005 Krzysztof Halasa <>
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of version 2 of the GNU General Public License
 * as published by the Free Software Foundation.
#ifndef __HDLC_H

#define __HDLC_H

#include <linux/skbuff.h>
#include <linux/netdevice.h>
#include <linux/hdlc/ioctl.h>
#include <uapi/linux/hdlc.h>

/* This structure is a private property of HDLC protocols.
   Hardware drivers have no interest here */

struct hdlc_proto {
int (*open)(struct net_device *dev);
void (*close)(struct net_device *dev);
void (*start)(struct net_device *dev); /* if open & DCD */
void (*stop)(struct net_device *dev); /* if open & !DCD */
void (*detach)(struct net_device *dev);
int (*ioctl)(struct net_device *dev, struct ifreq *ifr);
__be16 (*type_trans)(struct sk_buff *skb, struct net_device *dev);
int (*netif_rx)(struct sk_buff *skb);
netdev_tx_t (*xmit)(struct sk_buff *skb, struct net_device *dev);
struct module *module;
struct hdlc_proto *next; /* next protocol in the list */

/* Pointed to by netdev_priv(dev) */

typedef struct hdlc_device {
	/* used by HDLC layer to take control over HDLC device from hw driver*/
int (*attach)(struct net_device *dev,
		      unsigned short encoding, unsigned short parity);

	/* hardware driver must handle this instead of dev->hard_start_xmit */
netdev_tx_t (*xmit)(struct sk_buff *skb, struct net_device *dev);

	/* Things below are for HDLC layer internal use only */
const struct hdlc_proto *proto;
int carrier;
int open;
spinlock_t state_lock;
void *state;
void *priv;

} hdlc_device;

/* Exported from hdlc module */

/* Called by hardware driver when a user requests HDLC service */
int hdlc_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd);

/* Must be used by hardware driver on module startup/exit */

#define register_hdlc_device(dev)	register_netdev(dev)
void unregister_hdlc_device(struct net_device *dev);

void register_hdlc_protocol(struct hdlc_proto *proto);
void unregister_hdlc_protocol(struct hdlc_proto *proto);

struct net_device *alloc_hdlcdev(void *priv);

static inline struct hdlc_device* dev_to_hdlc(struct net_device *dev) { return netdev_priv(dev); }


Linus Torvalds1365.00%240.00%
Krzysztof Hałasa420.00%240.00%
Wang Chen315.00%120.00%

static __inline__ void debug_frame(const struct sk_buff *skb) { int i; for (i=0; i < skb->len; i++) { if (i == 100) { printk("...\n"); return; } printk(" %02X", skb->data[i]); } printk("\n"); }


Linus Torvalds64100.00%2100.00%

/* Must be called by hardware driver when HDLC device is being opened */ int hdlc_open(struct net_device *dev); /* Must be called by hardware driver when HDLC device is being closed */ void hdlc_close(struct net_device *dev); /* Must be pointed to by hw driver's dev->netdev_ops->ndo_start_xmit */ netdev_tx_t hdlc_start_xmit(struct sk_buff *skb, struct net_device *dev); int attach_hdlc_protocol(struct net_device *dev, struct hdlc_proto *proto, size_t size); /* May be used by hardware driver to gain control over HDLC device */ int detach_hdlc_protocol(struct net_device *dev);
static __inline__ __be16 hdlc_type_trans(struct sk_buff *skb, struct net_device *dev) { hdlc_device *hdlc = dev_to_hdlc(dev); skb->dev = dev; skb_reset_mac_header(skb); if (hdlc->proto->type_trans) return hdlc->proto->type_trans(skb, dev); else return htons(ETH_P_HDLC); }


Krzysztof Hałasa5179.69%350.00%
Arnaldo Carvalho de Melo1218.75%233.33%
Alexey Dobriyan11.56%116.67%

#endif /* __HDLC_H */

Overall Contributors

Krzysztof Hałasa26151.28%828.57%
Linus Torvalds11823.18%27.14%
François Romieu6612.97%13.57%
Al Viro407.86%932.14%
Arnaldo Carvalho de Melo122.36%27.14%
Wang Chen40.79%27.14%
Stephen Hemminger30.59%13.57%
David Howells30.59%13.57%
Andrew Lunn10.20%13.57%
Alexey Dobriyan10.20%13.57%
Directory: include/linux
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