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/*
* Generic HDLC support routines for Linux
* Point-to-point protocol support
*
* Copyright (C) 1999 - 2003 Krzysztof Halasa <khc@pm.waw.pl>
*
* 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.
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/poll.h>
#include <linux/errno.h>
#include <linux/if_arp.h>
#include <linux/init.h>
#include <linux/skbuff.h>
#include <linux/pkt_sched.h>
#include <linux/inetdevice.h>
#include <linux/lapb.h>
#include <linux/rtnetlink.h>
#include <linux/hdlc.h>
static int ppp_open(struct net_device *dev)
{
hdlc_device *hdlc = dev_to_hdlc(dev);
void *old_ioctl;
int result;
dev->priv = &hdlc->state.ppp.syncppp_ptr;
hdlc->state.ppp.syncppp_ptr = &hdlc->state.ppp.pppdev;
hdlc->state.ppp.pppdev.dev = dev;
old_ioctl = dev->do_ioctl;
hdlc->state.ppp.old_change_mtu = dev->change_mtu;
sppp_attach(&hdlc->state.ppp.pppdev);
/* sppp_attach nukes them. We don't need syncppp's ioctl */
dev->do_ioctl = old_ioctl;
hdlc->state.ppp.pppdev.sppp.pp_flags &= ~PP_CISCO;
dev->type = ARPHRD_PPP;
result = sppp_open(dev);
if (result) {
sppp_detach(dev);
return result;
}
return 0;
}
static void ppp_close(struct net_device *dev)
{
hdlc_device *hdlc = dev_to_hdlc(dev);
sppp_close(dev);
sppp_detach(dev);
dev->rebuild_header = NULL;
dev->change_mtu = hdlc->state.ppp.old_change_mtu;
dev->mtu = HDLC_MAX_MTU;
dev->hard_header_len = 16;
}
static unsigned short ppp_type_trans(struct sk_buff *skb,
struct net_device *dev)
{
return __constant_htons(ETH_P_WAN_PPP);
}
int hdlc_ppp_ioctl(struct net_device *dev, struct ifreq *ifr)
{
hdlc_device *hdlc = dev_to_hdlc(dev);
int result;
switch (ifr->ifr_settings.type) {
case IF_GET_PROTO:
ifr->ifr_settings.type = IF_PROTO_PPP;
return 0; /* return protocol only, no settable parameters */
case IF_PROTO_PPP:
if(!capable(CAP_NET_ADMIN))
return -EPERM;
if(dev->flags & IFF_UP)
return -EBUSY;
/* no settable parameters */
result=hdlc->attach(dev, ENCODING_NRZ,PARITY_CRC16_PR1_CCITT);
if (result)
return result;
hdlc_proto_detach(hdlc);
memset(&hdlc->proto, 0, sizeof(hdlc->proto));
hdlc->proto.open = ppp_open;
hdlc->proto.close = ppp_close;
hdlc->proto.type_trans = ppp_type_trans;
hdlc->proto.id = IF_PROTO_PPP;
dev->hard_start_xmit = hdlc->xmit;
dev->hard_header = NULL;
dev->type = ARPHRD_PPP;
dev->addr_len = 0;
return 0;
}
return -EINVAL;
}
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