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#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.
*
* 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.
*
* ==FILEVERSION 20000322==
*/
#include <linux/list.h>
#include <linux/poll.h>
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);
};
struct ppp_channel {
void *private; /* channel private data */
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 */
/* the following are not used at present */
int speed; /* transfer rate (bytes/second) */
int latency; /* overhead time in milliseconds */
};
#endif
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