/*
|
/*
|
* DLCI Implementation of Frame Relay protocol for Linux, according to
|
* DLCI Implementation of Frame Relay protocol for Linux, according to
|
* RFC 1490. This generic device provides en/decapsulation for an
|
* RFC 1490. This generic device provides en/decapsulation for an
|
* underlying hardware driver. Routes & IPs are assigned to these
|
* underlying hardware driver. Routes & IPs are assigned to these
|
* interfaces. Requires 'dlcicfg' program to create usable
|
* interfaces. Requires 'dlcicfg' program to create usable
|
* interfaces, the initial one, 'dlci' is for IOCTL use only.
|
* interfaces, the initial one, 'dlci' is for IOCTL use only.
|
*
|
*
|
* Version: @(#)dlci.c 0.30 12 Sep 1996
|
* Version: @(#)dlci.c 0.30 12 Sep 1996
|
*
|
*
|
* Author: Mike McLagan <mike.mclagan@linux.org>
|
* Author: Mike McLagan <mike.mclagan@linux.org>
|
*
|
*
|
* Changes:
|
* Changes:
|
*
|
*
|
* 0.15 Mike Mclagan Packet freeing, bug in kmalloc call
|
* 0.15 Mike Mclagan Packet freeing, bug in kmalloc call
|
* DLCI_RET handling
|
* DLCI_RET handling
|
* 0.20 Mike McLagan More conservative on which packets
|
* 0.20 Mike McLagan More conservative on which packets
|
* are returned for retry and whic are
|
* are returned for retry and whic are
|
* are dropped. If DLCI_RET_DROP is
|
* are dropped. If DLCI_RET_DROP is
|
* returned from the FRAD, the packet is
|
* returned from the FRAD, the packet is
|
* sent back to Linux for re-transmission
|
* sent back to Linux for re-transmission
|
* 0.25 Mike McLagan Converted to use SIOC IOCTL calls
|
* 0.25 Mike McLagan Converted to use SIOC IOCTL calls
|
* 0.30 Jim Freeman Fixed to allow IPX traffic
|
* 0.30 Jim Freeman Fixed to allow IPX traffic
|
*
|
*
|
* This program is free software; you can redistribute it and/or
|
* This program is free software; you can redistribute it and/or
|
* modify it under the terms of the GNU General Public License
|
* modify it under the terms of the GNU General Public License
|
* as published by the Free Software Foundation; either version
|
* as published by the Free Software Foundation; either version
|
* 2 of the License, or (at your option) any later version.
|
* 2 of the License, or (at your option) any later version.
|
*/
|
*/
|
|
|
#include <linux/config.h>
|
#include <linux/config.h>
|
#include <linux/module.h>
|
#include <linux/module.h>
|
|
|
#include <linux/kernel.h>
|
#include <linux/kernel.h>
|
#include <linux/sched.h>
|
#include <linux/sched.h>
|
#include <linux/types.h>
|
#include <linux/types.h>
|
#include <linux/fcntl.h>
|
#include <linux/fcntl.h>
|
#include <linux/interrupt.h>
|
#include <linux/interrupt.h>
|
#include <linux/ptrace.h>
|
#include <linux/ptrace.h>
|
#include <linux/ioport.h>
|
#include <linux/ioport.h>
|
#include <linux/in.h>
|
#include <linux/in.h>
|
#include <linux/malloc.h>
|
#include <linux/malloc.h>
|
#include <linux/string.h>
|
#include <linux/string.h>
|
#include <asm/system.h>
|
#include <asm/system.h>
|
#include <asm/bitops.h>
|
#include <asm/bitops.h>
|
#include <asm/io.h>
|
#include <asm/io.h>
|
#include <asm/dma.h>
|
#include <asm/dma.h>
|
#include <linux/errno.h>
|
#include <linux/errno.h>
|
|
|
#include <linux/netdevice.h>
|
#include <linux/netdevice.h>
|
#include <linux/skbuff.h>
|
#include <linux/skbuff.h>
|
#include <linux/if_arp.h>
|
#include <linux/if_arp.h>
|
#include <linux/if_frad.h>
|
#include <linux/if_frad.h>
|
|
|
#include <net/sock.h>
|
#include <net/sock.h>
|
|
|
static const char *devname = "dlci";
|
static const char *devname = "dlci";
|
static const char *version = "DLCI driver v0.30, 12 Sep 1996, mike.mclagan@linux.org";
|
static const char *version = "DLCI driver v0.30, 12 Sep 1996, mike.mclagan@linux.org";
|
|
|
static struct device *open_dev[CONFIG_DLCI_COUNT];
|
static struct device *open_dev[CONFIG_DLCI_COUNT];
|
|
|
static char *basename[16];
|
static char *basename[16];
|
|
|
int dlci_init(struct device *dev);
|
int dlci_init(struct device *dev);
|
|
|
/* allow FRAD's to register their name as a valid FRAD */
|
/* allow FRAD's to register their name as a valid FRAD */
|
int register_frad(const char *name)
|
int register_frad(const char *name)
|
{
|
{
|
int i;
|
int i;
|
|
|
if (!name)
|
if (!name)
|
return(-EINVAL);
|
return(-EINVAL);
|
|
|
for (i=0;i<sizeof(basename) / sizeof(char *);i++)
|
for (i=0;i<sizeof(basename) / sizeof(char *);i++)
|
{
|
{
|
if (!basename[i])
|
if (!basename[i])
|
break;
|
break;
|
|
|
/* take care of multiple registrations */
|
/* take care of multiple registrations */
|
if (strcmp(basename[i], name) == 0)
|
if (strcmp(basename[i], name) == 0)
|
return(0);
|
return(0);
|
}
|
}
|
|
|
if (i == sizeof(basename) / sizeof(char *))
|
if (i == sizeof(basename) / sizeof(char *))
|
return(-EMLINK);
|
return(-EMLINK);
|
|
|
basename[i] = kmalloc(strlen(name) + 1, GFP_KERNEL);
|
basename[i] = kmalloc(strlen(name) + 1, GFP_KERNEL);
|
if (!basename[i])
|
if (!basename[i])
|
return(-ENOMEM);
|
return(-ENOMEM);
|
|
|
strcpy(basename[i], name);
|
strcpy(basename[i], name);
|
|
|
return(0);
|
return(0);
|
}
|
}
|
|
|
int unregister_frad(const char *name)
|
int unregister_frad(const char *name)
|
{
|
{
|
int i;
|
int i;
|
|
|
if (!name)
|
if (!name)
|
return(-EINVAL);
|
return(-EINVAL);
|
|
|
for (i=0;i<sizeof(basename) / sizeof(char *);i++)
|
for (i=0;i<sizeof(basename) / sizeof(char *);i++)
|
if (basename[i] && (strcmp(basename[i], name) == 0))
|
if (basename[i] && (strcmp(basename[i], name) == 0))
|
break;
|
break;
|
|
|
if (i == sizeof(basename) / sizeof(char *))
|
if (i == sizeof(basename) / sizeof(char *))
|
return(-EINVAL);
|
return(-EINVAL);
|
|
|
kfree(basename[i]);
|
kfree(basename[i]);
|
basename[i] = NULL;
|
basename[i] = NULL;
|
|
|
return(0);
|
return(0);
|
}
|
}
|
|
|
/*
|
/*
|
* these encapsulate the RFC 1490 requirements as well as
|
* these encapsulate the RFC 1490 requirements as well as
|
* deal with packet transmission and reception, working with
|
* deal with packet transmission and reception, working with
|
* the upper network layers
|
* the upper network layers
|
*/
|
*/
|
|
|
static int dlci_header(struct sk_buff *skb, struct device *dev,
|
static int dlci_header(struct sk_buff *skb, struct device *dev,
|
unsigned short type, void *daddr, void *saddr,
|
unsigned short type, void *daddr, void *saddr,
|
unsigned len)
|
unsigned len)
|
{
|
{
|
struct frhdr hdr;
|
struct frhdr hdr;
|
struct dlci_local *dlp;
|
struct dlci_local *dlp;
|
unsigned hlen;
|
unsigned hlen;
|
char *dest;
|
char *dest;
|
|
|
dlp = dev->priv;
|
dlp = dev->priv;
|
|
|
hdr.control = FRAD_I_UI;
|
hdr.control = FRAD_I_UI;
|
switch(type)
|
switch(type)
|
{
|
{
|
case ETH_P_IP:
|
case ETH_P_IP:
|
hdr.IP_NLPID = FRAD_P_IP;
|
hdr.IP_NLPID = FRAD_P_IP;
|
hlen = sizeof(hdr.control) + sizeof(hdr.IP_NLPID);
|
hlen = sizeof(hdr.control) + sizeof(hdr.IP_NLPID);
|
break;
|
break;
|
|
|
/* feel free to add other types, if necessary */
|
/* feel free to add other types, if necessary */
|
|
|
default:
|
default:
|
hdr.pad = FRAD_P_PADDING;
|
hdr.pad = FRAD_P_PADDING;
|
hdr.NLPID = FRAD_P_SNAP;
|
hdr.NLPID = FRAD_P_SNAP;
|
memset(hdr.OUI, 0, sizeof(hdr.OUI));
|
memset(hdr.OUI, 0, sizeof(hdr.OUI));
|
hdr.PID = htons(type);
|
hdr.PID = htons(type);
|
hlen = sizeof(hdr);
|
hlen = sizeof(hdr);
|
break;
|
break;
|
}
|
}
|
|
|
dest = skb_push(skb, hlen);
|
dest = skb_push(skb, hlen);
|
if (!dest)
|
if (!dest)
|
return(0);
|
return(0);
|
|
|
memcpy(dest, &hdr, hlen);
|
memcpy(dest, &hdr, hlen);
|
|
|
return(hlen);
|
return(hlen);
|
}
|
}
|
|
|
static void dlci_receive(struct sk_buff *skb, struct device *dev)
|
static void dlci_receive(struct sk_buff *skb, struct device *dev)
|
{
|
{
|
struct dlci_local *dlp;
|
struct dlci_local *dlp;
|
struct frhdr *hdr;
|
struct frhdr *hdr;
|
int process, header;
|
int process, header;
|
|
|
dlp = dev->priv;
|
dlp = dev->priv;
|
hdr = (struct frhdr *) skb->data;
|
hdr = (struct frhdr *) skb->data;
|
process = 0;
|
process = 0;
|
header = 0;
|
header = 0;
|
skb->dev = dev;
|
skb->dev = dev;
|
|
|
if (hdr->control != FRAD_I_UI)
|
if (hdr->control != FRAD_I_UI)
|
{
|
{
|
printk(KERN_NOTICE "%s: Invalid header flag 0x%02X.\n", dev->name, hdr->control);
|
printk(KERN_NOTICE "%s: Invalid header flag 0x%02X.\n", dev->name, hdr->control);
|
dlp->stats.rx_errors++;
|
dlp->stats.rx_errors++;
|
}
|
}
|
else
|
else
|
switch(hdr->IP_NLPID)
|
switch(hdr->IP_NLPID)
|
{
|
{
|
case FRAD_P_PADDING:
|
case FRAD_P_PADDING:
|
if (hdr->NLPID != FRAD_P_SNAP)
|
if (hdr->NLPID != FRAD_P_SNAP)
|
{
|
{
|
printk(KERN_NOTICE "%s: Unsupported NLPID 0x%02X.\n", dev->name, hdr->NLPID);
|
printk(KERN_NOTICE "%s: Unsupported NLPID 0x%02X.\n", dev->name, hdr->NLPID);
|
dlp->stats.rx_errors++;
|
dlp->stats.rx_errors++;
|
break;
|
break;
|
}
|
}
|
|
|
if (hdr->OUI[0] + hdr->OUI[1] + hdr->OUI[2] != 0)
|
if (hdr->OUI[0] + hdr->OUI[1] + hdr->OUI[2] != 0)
|
{
|
{
|
printk(KERN_NOTICE "%s: Unsupported organizationally unique identifier 0x%02X-%02X-%02X.\n", dev->name, hdr->OUI[0], hdr->OUI[1], hdr->OUI[2]);
|
printk(KERN_NOTICE "%s: Unsupported organizationally unique identifier 0x%02X-%02X-%02X.\n", dev->name, hdr->OUI[0], hdr->OUI[1], hdr->OUI[2]);
|
dlp->stats.rx_errors++;
|
dlp->stats.rx_errors++;
|
break;
|
break;
|
}
|
}
|
|
|
/* at this point, it's an EtherType frame */
|
/* at this point, it's an EtherType frame */
|
header = sizeof(struct frhdr);
|
header = sizeof(struct frhdr);
|
/* Already in network order ! */
|
/* Already in network order ! */
|
skb->protocol = hdr->PID;
|
skb->protocol = hdr->PID;
|
process = 1;
|
process = 1;
|
break;
|
break;
|
|
|
case FRAD_P_IP:
|
case FRAD_P_IP:
|
header = sizeof(hdr->control) + sizeof(hdr->IP_NLPID);
|
header = sizeof(hdr->control) + sizeof(hdr->IP_NLPID);
|
skb->protocol = htons(ETH_P_IP);
|
skb->protocol = htons(ETH_P_IP);
|
process = 1;
|
process = 1;
|
break;
|
break;
|
|
|
case FRAD_P_SNAP:
|
case FRAD_P_SNAP:
|
case FRAD_P_Q933:
|
case FRAD_P_Q933:
|
case FRAD_P_CLNP:
|
case FRAD_P_CLNP:
|
printk(KERN_NOTICE "%s: Unsupported NLPID 0x%02X.\n", dev->name, hdr->pad);
|
printk(KERN_NOTICE "%s: Unsupported NLPID 0x%02X.\n", dev->name, hdr->pad);
|
dlp->stats.rx_errors++;
|
dlp->stats.rx_errors++;
|
break;
|
break;
|
|
|
default:
|
default:
|
printk(KERN_NOTICE "%s: Invalid pad byte 0x%02X.\n", dev->name, hdr->pad);
|
printk(KERN_NOTICE "%s: Invalid pad byte 0x%02X.\n", dev->name, hdr->pad);
|
dlp->stats.rx_errors++;
|
dlp->stats.rx_errors++;
|
break;
|
break;
|
}
|
}
|
|
|
if (process)
|
if (process)
|
{
|
{
|
/* we've set up the protocol, so discard the header */
|
/* we've set up the protocol, so discard the header */
|
skb->mac.raw = skb->data;
|
skb->mac.raw = skb->data;
|
skb_pull(skb, header);
|
skb_pull(skb, header);
|
netif_rx(skb);
|
netif_rx(skb);
|
dlp->stats.rx_packets++;
|
dlp->stats.rx_packets++;
|
}
|
}
|
else
|
else
|
dev_kfree_skb(skb, FREE_WRITE);
|
dev_kfree_skb(skb, FREE_WRITE);
|
}
|
}
|
|
|
static int dlci_transmit(struct sk_buff *skb, struct device *dev)
|
static int dlci_transmit(struct sk_buff *skb, struct device *dev)
|
{
|
{
|
struct dlci_local *dlp;
|
struct dlci_local *dlp;
|
int ret;
|
int ret;
|
|
|
ret = 0;
|
ret = 0;
|
|
|
if (!skb || !dev)
|
if (!skb || !dev)
|
return(0);
|
return(0);
|
|
|
if (dev->tbusy)
|
if (dev->tbusy)
|
return(1);
|
return(1);
|
|
|
dlp = dev->priv;
|
dlp = dev->priv;
|
|
|
if (set_bit(0, (void*)&dev->tbusy) != 0)
|
if (set_bit(0, (void*)&dev->tbusy) != 0)
|
printk(KERN_WARNING "%s: transmitter access conflict.\n", dev->name);
|
printk(KERN_WARNING "%s: transmitter access conflict.\n", dev->name);
|
else
|
else
|
{
|
{
|
ret = dlp->slave->hard_start_xmit(skb, dlp->slave);
|
ret = dlp->slave->hard_start_xmit(skb, dlp->slave);
|
switch (ret)
|
switch (ret)
|
{
|
{
|
case DLCI_RET_OK:
|
case DLCI_RET_OK:
|
dlp->stats.tx_packets++;
|
dlp->stats.tx_packets++;
|
ret = 0;
|
ret = 0;
|
break;
|
break;
|
|
|
case DLCI_RET_ERR:
|
case DLCI_RET_ERR:
|
dlp->stats.tx_errors++;
|
dlp->stats.tx_errors++;
|
ret = 0;
|
ret = 0;
|
break;
|
break;
|
|
|
case DLCI_RET_DROP:
|
case DLCI_RET_DROP:
|
dlp->stats.tx_dropped++;
|
dlp->stats.tx_dropped++;
|
ret = 1;
|
ret = 1;
|
break;
|
break;
|
}
|
}
|
|
|
/* Alan Cox recommends always returning 0, and always freeing the packet */
|
/* Alan Cox recommends always returning 0, and always freeing the packet */
|
/* experience suggest a slightly more conservative approach */
|
/* experience suggest a slightly more conservative approach */
|
|
|
if (!ret)
|
if (!ret)
|
dev_kfree_skb(skb, FREE_WRITE);
|
dev_kfree_skb(skb, FREE_WRITE);
|
|
|
dev->tbusy = 0;
|
dev->tbusy = 0;
|
}
|
}
|
|
|
return(ret);
|
return(ret);
|
}
|
}
|
|
|
int dlci_config(struct device *dev, struct dlci_conf *conf, int get)
|
int dlci_config(struct device *dev, struct dlci_conf *conf, int get)
|
{
|
{
|
struct dlci_conf config;
|
struct dlci_conf config;
|
struct dlci_local *dlp;
|
struct dlci_local *dlp;
|
struct frad_local *flp;
|
struct frad_local *flp;
|
int err;
|
int err;
|
|
|
dlp = dev->priv;
|
dlp = dev->priv;
|
|
|
flp = dlp->slave->priv;
|
flp = dlp->slave->priv;
|
|
|
if (!get)
|
if (!get)
|
{
|
{
|
err = verify_area(VERIFY_READ, conf, sizeof(struct dlci_conf));
|
err = verify_area(VERIFY_READ, conf, sizeof(struct dlci_conf));
|
if (err)
|
if (err)
|
return(err);
|
return(err);
|
|
|
memcpy_fromfs(&config, conf, sizeof(struct dlci_conf));
|
memcpy_fromfs(&config, conf, sizeof(struct dlci_conf));
|
if (config.flags & ~DLCI_VALID_FLAGS)
|
if (config.flags & ~DLCI_VALID_FLAGS)
|
return(-EINVAL);
|
return(-EINVAL);
|
memcpy(&dlp->config, &config, sizeof(struct dlci_conf));
|
memcpy(&dlp->config, &config, sizeof(struct dlci_conf));
|
dlp->configured = 1;
|
dlp->configured = 1;
|
}
|
}
|
|
|
err = (*flp->dlci_conf)(dlp->slave, dev, get);
|
err = (*flp->dlci_conf)(dlp->slave, dev, get);
|
if (err)
|
if (err)
|
return(err);
|
return(err);
|
|
|
if (get)
|
if (get)
|
{
|
{
|
err = verify_area(VERIFY_WRITE, conf, sizeof(struct dlci_conf));
|
err = verify_area(VERIFY_WRITE, conf, sizeof(struct dlci_conf));
|
if (err)
|
if (err)
|
return(err);
|
return(err);
|
|
|
memcpy_tofs(conf, &dlp->config, sizeof(struct dlci_conf));
|
memcpy_tofs(conf, &dlp->config, sizeof(struct dlci_conf));
|
}
|
}
|
|
|
return(0);
|
return(0);
|
}
|
}
|
|
|
int dlci_dev_ioctl(struct device *dev, struct ifreq *ifr, int cmd)
|
int dlci_dev_ioctl(struct device *dev, struct ifreq *ifr, int cmd)
|
{
|
{
|
struct dlci_local *dlp;
|
struct dlci_local *dlp;
|
int err, len;
|
int err, len;
|
|
|
if (!suser())
|
if (!suser())
|
return(-EPERM);
|
return(-EPERM);
|
|
|
dlp = dev->priv;
|
dlp = dev->priv;
|
|
|
switch(cmd)
|
switch(cmd)
|
{
|
{
|
case DLCI_GET_SLAVE:
|
case DLCI_GET_SLAVE:
|
if (!*(short *)(dev->dev_addr))
|
if (!*(short *)(dev->dev_addr))
|
return(-EINVAL);
|
return(-EINVAL);
|
|
|
len = strlen(dlp->slave->name) + 1;
|
len = strlen(dlp->slave->name) + 1;
|
err = verify_area(VERIFY_WRITE, ifr->ifr_slave, len);
|
err = verify_area(VERIFY_WRITE, ifr->ifr_slave, len);
|
if (err)
|
if (err)
|
return err;
|
return err;
|
|
|
memcpy_tofs(ifr->ifr_slave, dlp->slave->name, len);
|
memcpy_tofs(ifr->ifr_slave, dlp->slave->name, len);
|
break;
|
break;
|
|
|
case DLCI_GET_CONF:
|
case DLCI_GET_CONF:
|
case DLCI_SET_CONF:
|
case DLCI_SET_CONF:
|
if (!*(short *)(dev->dev_addr))
|
if (!*(short *)(dev->dev_addr))
|
return(-EINVAL);
|
return(-EINVAL);
|
|
|
return(dlci_config(dev, (struct dlci_conf *) ifr->ifr_data, cmd == DLCI_GET_CONF));
|
return(dlci_config(dev, (struct dlci_conf *) ifr->ifr_data, cmd == DLCI_GET_CONF));
|
break;
|
break;
|
|
|
default:
|
default:
|
return(-EOPNOTSUPP);
|
return(-EOPNOTSUPP);
|
}
|
}
|
return(0);
|
return(0);
|
}
|
}
|
|
|
static int dlci_change_mtu(struct device *dev, int new_mtu)
|
static int dlci_change_mtu(struct device *dev, int new_mtu)
|
{
|
{
|
struct dlci_local *dlp;
|
struct dlci_local *dlp;
|
|
|
dlp = dev->priv;
|
dlp = dev->priv;
|
|
|
return((*dlp->slave->change_mtu)(dlp->slave, new_mtu));
|
return((*dlp->slave->change_mtu)(dlp->slave, new_mtu));
|
}
|
}
|
|
|
static int dlci_open(struct device *dev)
|
static int dlci_open(struct device *dev)
|
{
|
{
|
struct dlci_local *dlp;
|
struct dlci_local *dlp;
|
struct frad_local *flp;
|
struct frad_local *flp;
|
int err;
|
int err;
|
|
|
dlp = dev->priv;
|
dlp = dev->priv;
|
|
|
if (!*(short *)(dev->dev_addr))
|
if (!*(short *)(dev->dev_addr))
|
return(-EINVAL);
|
return(-EINVAL);
|
|
|
if (!dlp->slave->start)
|
if (!dlp->slave->start)
|
return(-ENOTCONN);
|
return(-ENOTCONN);
|
|
|
dev->flags = 0;
|
dev->flags = 0;
|
dev->tbusy = 0;
|
dev->tbusy = 0;
|
dev->interrupt = 0;
|
dev->interrupt = 0;
|
dev->start = 1;
|
dev->start = 1;
|
|
|
flp = dlp->slave->priv;
|
flp = dlp->slave->priv;
|
err = (*flp->activate)(dlp->slave, dev);
|
err = (*flp->activate)(dlp->slave, dev);
|
if (err)
|
if (err)
|
return(err);
|
return(err);
|
|
|
return 0;
|
return 0;
|
}
|
}
|
|
|
static int dlci_close(struct device *dev)
|
static int dlci_close(struct device *dev)
|
{
|
{
|
struct dlci_local *dlp;
|
struct dlci_local *dlp;
|
struct frad_local *flp;
|
struct frad_local *flp;
|
int err;
|
int err;
|
|
|
dlp = dev->priv;
|
dlp = dev->priv;
|
|
|
flp = dlp->slave->priv;
|
flp = dlp->slave->priv;
|
err = (*flp->deactivate)(dlp->slave, dev);
|
err = (*flp->deactivate)(dlp->slave, dev);
|
|
|
dev->start = 0;
|
dev->start = 0;
|
dev->tbusy = 1;
|
dev->tbusy = 1;
|
|
|
return 0;
|
return 0;
|
}
|
}
|
|
|
static struct enet_statistics *dlci_get_stats(struct device *dev)
|
static struct enet_statistics *dlci_get_stats(struct device *dev)
|
{
|
{
|
struct dlci_local *dlp;
|
struct dlci_local *dlp;
|
|
|
dlp = dev->priv;
|
dlp = dev->priv;
|
|
|
return(&dlp->stats);
|
return(&dlp->stats);
|
}
|
}
|
|
|
int dlci_add(struct dlci_add *dlci)
|
int dlci_add(struct dlci_add *dlci)
|
{
|
{
|
struct device *master, *slave;
|
struct device *master, *slave;
|
struct dlci_local *dlp;
|
struct dlci_local *dlp;
|
struct frad_local *flp;
|
struct frad_local *flp;
|
int err, i;
|
int err, i;
|
char buf[10];
|
char buf[10];
|
|
|
/* validate slave device */
|
/* validate slave device */
|
slave = dev_get(dlci->devname);
|
slave = dev_get(dlci->devname);
|
if (!slave)
|
if (!slave)
|
return(-ENODEV);
|
return(-ENODEV);
|
|
|
if (slave->type != ARPHRD_FRAD)
|
if (slave->type != ARPHRD_FRAD)
|
return(-EINVAL);
|
return(-EINVAL);
|
|
|
/* check for registration */
|
/* check for registration */
|
for (i=0;i<sizeof(basename) / sizeof(char *); i++)
|
for (i=0;i<sizeof(basename) / sizeof(char *); i++)
|
if ((basename[i]) &&
|
if ((basename[i]) &&
|
(strncmp(dlci->devname, basename[i], strlen(basename[i])) == 0) &&
|
(strncmp(dlci->devname, basename[i], strlen(basename[i])) == 0) &&
|
(strlen(dlci->devname) > strlen(basename[i])))
|
(strlen(dlci->devname) > strlen(basename[i])))
|
break;
|
break;
|
|
|
if (i == sizeof(basename) / sizeof(char *))
|
if (i == sizeof(basename) / sizeof(char *))
|
return(-EINVAL);
|
return(-EINVAL);
|
|
|
/* check for too many open devices : should this be dynamic ? */
|
/* check for too many open devices : should this be dynamic ? */
|
for(i=0;i<CONFIG_DLCI_COUNT;i++)
|
for(i=0;i<CONFIG_DLCI_COUNT;i++)
|
if (!open_dev[i])
|
if (!open_dev[i])
|
break;
|
break;
|
|
|
if (i == CONFIG_DLCI_COUNT)
|
if (i == CONFIG_DLCI_COUNT)
|
return(-ENOSPC); /* #### Alan: Comments on this?? */
|
return(-ENOSPC); /* #### Alan: Comments on this?? */
|
|
|
/* create device name */
|
/* create device name */
|
sprintf(buf, "%s%02i", devname, i);
|
sprintf(buf, "%s%02i", devname, i);
|
|
|
master = kmalloc(sizeof(*master), GFP_KERNEL);
|
master = kmalloc(sizeof(*master), GFP_KERNEL);
|
if (!master)
|
if (!master)
|
return(-ENOMEM);
|
return(-ENOMEM);
|
|
|
memset(master, 0, sizeof(*master));
|
memset(master, 0, sizeof(*master));
|
master->name = kmalloc(strlen(buf) + 1, GFP_KERNEL);
|
master->name = kmalloc(strlen(buf) + 1, GFP_KERNEL);
|
|
|
if (!master->name)
|
if (!master->name)
|
{
|
{
|
kfree(master);
|
kfree(master);
|
return(-ENOMEM);
|
return(-ENOMEM);
|
}
|
}
|
|
|
strcpy(master->name, buf);
|
strcpy(master->name, buf);
|
master->init = dlci_init;
|
master->init = dlci_init;
|
master->flags = 0;
|
master->flags = 0;
|
|
|
err = register_netdev(master);
|
err = register_netdev(master);
|
if (err < 0)
|
if (err < 0)
|
{
|
{
|
kfree(master->name);
|
kfree(master->name);
|
kfree(master);
|
kfree(master);
|
return(err);
|
return(err);
|
}
|
}
|
|
|
*(short *)(master->dev_addr) = dlci->dlci;
|
*(short *)(master->dev_addr) = dlci->dlci;
|
|
|
dlp = (struct dlci_local *) master->priv;
|
dlp = (struct dlci_local *) master->priv;
|
dlp->slave = slave;
|
dlp->slave = slave;
|
|
|
flp = slave->priv;
|
flp = slave->priv;
|
err = flp ? (*flp->assoc)(slave, master) : -EINVAL;
|
err = flp ? (*flp->assoc)(slave, master) : -EINVAL;
|
if (err < 0)
|
if (err < 0)
|
{
|
{
|
unregister_netdev(master);
|
unregister_netdev(master);
|
kfree(master->priv);
|
kfree(master->priv);
|
kfree(master->name);
|
kfree(master->name);
|
kfree(master);
|
kfree(master);
|
return(err);
|
return(err);
|
}
|
}
|
|
|
strcpy(dlci->devname, buf);
|
strcpy(dlci->devname, buf);
|
open_dev[i] = master;
|
open_dev[i] = master;
|
MOD_INC_USE_COUNT;
|
MOD_INC_USE_COUNT;
|
return(0);
|
return(0);
|
}
|
}
|
|
|
int dlci_del(struct dlci_add *dlci)
|
int dlci_del(struct dlci_add *dlci)
|
{
|
{
|
struct dlci_local *dlp;
|
struct dlci_local *dlp;
|
struct frad_local *flp;
|
struct frad_local *flp;
|
struct device *master, *slave;
|
struct device *master, *slave;
|
int i, err;
|
int i, err;
|
|
|
/* validate slave device */
|
/* validate slave device */
|
master = dev_get(dlci->devname);
|
master = dev_get(dlci->devname);
|
if (!master)
|
if (!master)
|
return(-ENODEV);
|
return(-ENODEV);
|
|
|
if (master->start)
|
if (master->start)
|
return(-EBUSY);
|
return(-EBUSY);
|
|
|
dlp = master->priv;
|
dlp = master->priv;
|
slave = dlp->slave;
|
slave = dlp->slave;
|
flp = slave->priv;
|
flp = slave->priv;
|
|
|
err = (*flp->deassoc)(slave, master);
|
err = (*flp->deassoc)(slave, master);
|
if (err)
|
if (err)
|
return(err);
|
return(err);
|
|
|
unregister_netdev(master);
|
unregister_netdev(master);
|
|
|
for(i=0;i<CONFIG_DLCI_COUNT;i++)
|
for(i=0;i<CONFIG_DLCI_COUNT;i++)
|
if (master == open_dev[i])
|
if (master == open_dev[i])
|
break;
|
break;
|
|
|
if (i<CONFIG_DLCI_COUNT)
|
if (i<CONFIG_DLCI_COUNT)
|
open_dev[i] = NULL;
|
open_dev[i] = NULL;
|
|
|
kfree(master->priv);
|
kfree(master->priv);
|
kfree(master->name);
|
kfree(master->name);
|
kfree(master);
|
kfree(master);
|
|
|
MOD_DEC_USE_COUNT;
|
MOD_DEC_USE_COUNT;
|
|
|
return(0);
|
return(0);
|
}
|
}
|
|
|
int dlci_ioctl(unsigned int cmd, void *arg)
|
int dlci_ioctl(unsigned int cmd, void *arg)
|
{
|
{
|
int err;
|
int err;
|
struct dlci_add add;
|
struct dlci_add add;
|
|
|
if (!suser())
|
if (!suser())
|
return(-EPERM);
|
return(-EPERM);
|
|
|
err=verify_area(VERIFY_READ, arg, sizeof(struct dlci_add));
|
err=verify_area(VERIFY_READ, arg, sizeof(struct dlci_add));
|
if (err)
|
if (err)
|
return(err);
|
return(err);
|
|
|
memcpy_fromfs(&add, arg, sizeof(struct dlci_add));
|
memcpy_fromfs(&add, arg, sizeof(struct dlci_add));
|
|
|
switch (cmd)
|
switch (cmd)
|
{
|
{
|
case SIOCADDDLCI:
|
case SIOCADDDLCI:
|
err = verify_area(VERIFY_WRITE, arg, sizeof(struct dlci_add));
|
err = verify_area(VERIFY_WRITE, arg, sizeof(struct dlci_add));
|
if (err)
|
if (err)
|
return(err);
|
return(err);
|
|
|
err = dlci_add(&add);
|
err = dlci_add(&add);
|
|
|
if (!err)
|
if (!err)
|
memcpy_tofs(arg, &add, sizeof(struct dlci_add));
|
memcpy_tofs(arg, &add, sizeof(struct dlci_add));
|
break;
|
break;
|
|
|
case SIOCDELDLCI:
|
case SIOCDELDLCI:
|
err = dlci_del(&add);
|
err = dlci_del(&add);
|
break;
|
break;
|
|
|
default:
|
default:
|
err = -EINVAL;
|
err = -EINVAL;
|
}
|
}
|
|
|
return(err);
|
return(err);
|
}
|
}
|
|
|
int dlci_init(struct device *dev)
|
int dlci_init(struct device *dev)
|
{
|
{
|
struct dlci_local *dlp;
|
struct dlci_local *dlp;
|
int i;
|
int i;
|
|
|
dev->priv = kmalloc(sizeof(struct dlci_local), GFP_KERNEL);
|
dev->priv = kmalloc(sizeof(struct dlci_local), GFP_KERNEL);
|
if (!dev->priv)
|
if (!dev->priv)
|
return(-ENOMEM);
|
return(-ENOMEM);
|
|
|
memset(dev->priv, 0, sizeof(struct dlci_local));
|
memset(dev->priv, 0, sizeof(struct dlci_local));
|
dlp = dev->priv;
|
dlp = dev->priv;
|
|
|
dev->flags = 0;
|
dev->flags = 0;
|
dev->open = dlci_open;
|
dev->open = dlci_open;
|
dev->stop = dlci_close;
|
dev->stop = dlci_close;
|
dev->do_ioctl = dlci_dev_ioctl;
|
dev->do_ioctl = dlci_dev_ioctl;
|
dev->hard_start_xmit = dlci_transmit;
|
dev->hard_start_xmit = dlci_transmit;
|
dev->hard_header = dlci_header;
|
dev->hard_header = dlci_header;
|
dev->get_stats = dlci_get_stats;
|
dev->get_stats = dlci_get_stats;
|
dev->change_mtu = dlci_change_mtu;
|
dev->change_mtu = dlci_change_mtu;
|
|
|
dlp->receive = dlci_receive;
|
dlp->receive = dlci_receive;
|
|
|
dev->type = ARPHRD_DLCI;
|
dev->type = ARPHRD_DLCI;
|
dev->family = AF_INET;
|
dev->family = AF_INET;
|
dev->hard_header_len = sizeof(struct frhdr);
|
dev->hard_header_len = sizeof(struct frhdr);
|
dev->pa_alen = sizeof(unsigned long);
|
dev->pa_alen = sizeof(unsigned long);
|
dev->addr_len = sizeof(short);
|
dev->addr_len = sizeof(short);
|
memset(dev->dev_addr, 0, sizeof(dev->dev_addr));
|
memset(dev->dev_addr, 0, sizeof(dev->dev_addr));
|
|
|
dev->pa_addr = 0;
|
dev->pa_addr = 0;
|
dev->pa_dstaddr = 0;
|
dev->pa_dstaddr = 0;
|
dev->pa_brdaddr = 0;
|
dev->pa_brdaddr = 0;
|
dev->pa_mask = 0;
|
dev->pa_mask = 0;
|
|
|
for (i = 0; i < DEV_NUMBUFFS; i++)
|
for (i = 0; i < DEV_NUMBUFFS; i++)
|
skb_queue_head_init(&dev->buffs[i]);
|
skb_queue_head_init(&dev->buffs[i]);
|
|
|
return(0);
|
return(0);
|
}
|
}
|
|
|
int dlci_setup(void)
|
int dlci_setup(void)
|
{
|
{
|
int i;
|
int i;
|
|
|
printk("%s.\n", version);
|
printk("%s.\n", version);
|
|
|
for(i=0;i<CONFIG_DLCI_COUNT;i++)
|
for(i=0;i<CONFIG_DLCI_COUNT;i++)
|
open_dev[i] = NULL;
|
open_dev[i] = NULL;
|
|
|
for(i=0;i<sizeof(basename) / sizeof(char *);i++)
|
for(i=0;i<sizeof(basename) / sizeof(char *);i++)
|
basename[i] = NULL;
|
basename[i] = NULL;
|
|
|
return(0);
|
return(0);
|
}
|
}
|
|
|
#ifdef MODULE
|
#ifdef MODULE
|
|
|
extern int (*dlci_ioctl_hook)(unsigned int, void *);
|
extern int (*dlci_ioctl_hook)(unsigned int, void *);
|
|
|
int init_module(void)
|
int init_module(void)
|
{
|
{
|
dlci_ioctl_hook = dlci_ioctl;
|
dlci_ioctl_hook = dlci_ioctl;
|
|
|
return(dlci_setup());
|
return(dlci_setup());
|
}
|
}
|
|
|
void cleanup_module(void)
|
void cleanup_module(void)
|
{
|
{
|
dlci_ioctl_hook = NULL;
|
dlci_ioctl_hook = NULL;
|
}
|
}
|
#endif /* MODULE */
|
#endif /* MODULE */
|
|
|