mirror of
https://github.com/torvalds/linux.git
synced 2024-11-06 03:51:48 +00:00
ab611487d8
tr_type_trans(), hippi_type_trans() left as-is. Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
90 lines
2.2 KiB
C
90 lines
2.2 KiB
C
/*
|
|
* Generic HDLC support routines for Linux
|
|
* HDLC 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 __be16 raw_type_trans(struct sk_buff *skb, struct net_device *dev)
|
|
{
|
|
return __constant_htons(ETH_P_IP);
|
|
}
|
|
|
|
|
|
|
|
int hdlc_raw_ioctl(struct net_device *dev, struct ifreq *ifr)
|
|
{
|
|
raw_hdlc_proto __user *raw_s = ifr->ifr_settings.ifs_ifsu.raw_hdlc;
|
|
const size_t size = sizeof(raw_hdlc_proto);
|
|
raw_hdlc_proto new_settings;
|
|
hdlc_device *hdlc = dev_to_hdlc(dev);
|
|
int result;
|
|
|
|
switch (ifr->ifr_settings.type) {
|
|
case IF_GET_PROTO:
|
|
ifr->ifr_settings.type = IF_PROTO_HDLC;
|
|
if (ifr->ifr_settings.size < size) {
|
|
ifr->ifr_settings.size = size; /* data size wanted */
|
|
return -ENOBUFS;
|
|
}
|
|
if (copy_to_user(raw_s, &hdlc->state.raw_hdlc.settings, size))
|
|
return -EFAULT;
|
|
return 0;
|
|
|
|
case IF_PROTO_HDLC:
|
|
if (!capable(CAP_NET_ADMIN))
|
|
return -EPERM;
|
|
|
|
if (dev->flags & IFF_UP)
|
|
return -EBUSY;
|
|
|
|
if (copy_from_user(&new_settings, raw_s, size))
|
|
return -EFAULT;
|
|
|
|
if (new_settings.encoding == ENCODING_DEFAULT)
|
|
new_settings.encoding = ENCODING_NRZ;
|
|
|
|
if (new_settings.parity == PARITY_DEFAULT)
|
|
new_settings.parity = PARITY_CRC16_PR1_CCITT;
|
|
|
|
result = hdlc->attach(dev, new_settings.encoding,
|
|
new_settings.parity);
|
|
if (result)
|
|
return result;
|
|
|
|
hdlc_proto_detach(hdlc);
|
|
memcpy(&hdlc->state.raw_hdlc.settings, &new_settings, size);
|
|
memset(&hdlc->proto, 0, sizeof(hdlc->proto));
|
|
|
|
hdlc->proto.type_trans = raw_type_trans;
|
|
hdlc->proto.id = IF_PROTO_HDLC;
|
|
dev->hard_start_xmit = hdlc->xmit;
|
|
dev->hard_header = NULL;
|
|
dev->type = ARPHRD_RAWHDLC;
|
|
dev->flags = IFF_POINTOPOINT | IFF_NOARP;
|
|
dev->addr_len = 0;
|
|
return 0;
|
|
}
|
|
|
|
return -EINVAL;
|
|
}
|