source: svn/trunk/newcon3bcm2_21bu/toolchain/mips-linux-uclibc/include/linux/ppp_channel.h

#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/skbuff.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