mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-15 16:24:13 +08:00
1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
116 lines
2.5 KiB
C
116 lines
2.5 KiB
C
/*
|
|
* 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;
|
|
}
|