Something went wrong. Try again.
(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux
Something went wrong. Try again.
12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970717273747576777879808182838485868788899091/* SPDX-License-Identifier: GPL-2.0-or-later */#ifndef _PPP_CHANNEL_H_#define _PPP_CHANNEL_H_/* * Definitions for the interface between the generic PPP code * and a PPP channel. * * A PPP channel provides a way for the generic PPP code to send * and receive packets over some sort of communications medium. * Packets are stored in sk_buffs and have the 2-byte PPP protocol * number at the start, but not the address and control bytes. * * Copyright 1999 Paul Mackerras. * * ==FILEVERSION 20000322== */
#include <linux/list.h>#include <linux/skbuff.h>#include <linux/poll.h>#include <net/net_namespace.h>
struct net_device_path;struct net_device_path_ctx;struct ppp_channel;
struct ppp_channel_ops { /* Send a packet (or multilink fragment) on this channel. Returns 1 if it was accepted, 0 if not. */ int (*start_xmit)(struct ppp_channel *, struct sk_buff *); /* Handle an ioctl call that has come in via /dev/ppp. */ int (*ioctl)(struct ppp_channel *, unsigned int, unsigned long); int (*fill_forward_path)(struct net_device_path_ctx *, struct net_device_path *, const struct ppp_channel *);};
struct ppp_channel { void *private; /* channel private data */ const struct ppp_channel_ops *ops; /* operations for this channel */ int mtu; /* max transmit packet size */ int hdrlen; /* amount of headroom channel needs */ void *ppp; /* opaque to channel */ int speed; /* transfer rate (bytes/second) */ bool direct_xmit; /* no qdisc, xmit directly */};
#ifdef __KERNEL__/* Called by the channel when it can send some more data. */extern void ppp_output_wakeup(struct ppp_channel *);
/* Called by the channel to process a received PPP packet. The packet should have just the 2-byte PPP protocol header. */extern void ppp_input(struct ppp_channel *, struct sk_buff *);
/* Called by the channel when an input error occurs, indicating that we may have missed a packet. */extern void ppp_input_error(struct ppp_channel *);
/* Attach a channel to a given PPP unit in specified net. */extern int ppp_register_net_channel(struct net *, struct ppp_channel *);
/* Attach a channel to a given PPP unit. */extern int ppp_register_channel(struct ppp_channel *);
/* Detach a channel from its PPP unit (e.g. on hangup). */extern void ppp_unregister_channel(struct ppp_channel *);
/* Get the channel number for a channel */extern int ppp_channel_index(struct ppp_channel *);
/* Get the unit number associated with a channel, or -1 if none */extern int ppp_unit_number(struct ppp_channel *);
/* Get the device name associated with a channel, or NULL if none. * Caller must hold RCU read lock. */extern char *ppp_dev_name(struct ppp_channel *);
/* * SMP locking notes: * The channel code must ensure that when it calls ppp_unregister_channel, * nothing is executing in any of the procedures above, for that * channel. The generic layer will ensure that nothing is executing * in the start_xmit and ioctl routines for the channel by the time * that ppp_unregister_channel returns. */
#endif /* __KERNEL__ */#endif