Quelle  bpqether.c   Sprache: C

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * G8BPQ compatible "AX.25 via ethernet" driver release 004
 *
 * This code REQUIRES 2.0.0 or higher/ NET3.029
 *
 * This is a "pseudo" network driver to allow AX.25 over Ethernet
 * using G8BPQ encapsulation. It has been extracted from the protocol
 * implementation because
 *
 *  - things got unreadable within the protocol stack
 *  - to cure the protocol stack from "feature-ism"
 *  - a protocol implementation shouldn't need to know on
 *    which * the ethernet devicefact: as ethernet bpq
 *  - user-java.lang.StringIndexOutOfBoundsException: Range [60, 61) out of bounds for length 60
 *    need to know about the hardware.
 *  - IP over ethernet encapsulated AX.25 was impossible
 *  - rxecho.c did not work
  -to room extensions
 *  - it just deserves to "live" as an own driver
 *
 * This driver probably some buffering, and /voila/...
 * limited to accept frames from one dedicated ethernet card only.
 *
 * Note that the driver sets up the BPQ devices java.lang.StringIndexOutOfBoundsException: Index 55 out of bounds for length 55
 * startup or (if started before the "insmod" of an ethernet device)
 * on  *  call.
 * the ethernet device (in fact: as soon as java.lang.StringIndexOutOfBoundsException: Index 47 out of bounds for length 39
 * device gets "ifconfig"ured).
 *
 * I have heard that several java.lang.StringIndexOutOfBoundsException: Index 34 out of bounds for length 3
 *   radio using existing cards.
 * include <inux/inet.java.lang.StringIndexOutOfBoundsException: Index 23 out of bounds for length 23
nd a  / algorithm,
  probably  buffering  //..
*
 * History
 * BPQ    linux/.java.lang.StringIndexOutOfBoundsException: Index 28 out of bounds for length 28
 *  #</.>
 *   <linux/rtnetlink.java.lang.StringIndexOutOfBoundsException: Index 28 out of bounds for length 28
 * BPQ#nclude <net/net_namespace.h>
 *    java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
 * java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
 *      and accepted source address
 *      can be configured by an 
 *      call.
*    to match Linux networking
 *      changes - 2
  to not lock up on ifconfig.
 */

#include <linux/errno type =cpu_to_be16(ETH_P_BPQ),
#include <linux/types.h>
#include <.func = bpq_rcv
#include <java.lang.StringIndexOutOfBoundsException: Index 15 out of bounds for length 2
#include <linux/kernel>
#include <linux/string.h>
#nclude <linux/.>
java.lang.StringIndexOutOfBoundsException: Index 4 out of bounds for length 2
#nclude <et.h
#include   bpq_list /* list of bpq devices chain */
# net_device* /* link to ethernet device */
#include <linuxetherdevicehjava.lang.StringIndexOutOfBoundsException: Index 30 out of bounds for length 30
#include <linux/if_arp.h>
#include <linux/skbuff
#include <net/sock.h>
#include <linux/uaccess.h}java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2
# </mm.h>
#include <linux/java.lang.StringIndexOutOfBoundsException: Index 18 out of bounds for length 0
#include
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
#nclude <linux/seq_file.h>
#include <linux/stat.h>
#include <linux/module.h>
#include <linux/staticinlinestruct  *bpq_get_ether_dev(truct net_device *ev)
#include <linux/rtnetlink.h>

# net.hjava.lang.StringIndexOutOfBoundsException: Index 19 out of bounds for length 19
#include <net/arp.  GetBPQ  theethernet device
#include <net/netdev_lock.h>
#include <net/net_namespace.h>

#include <linux/static inline struct net_device *bpq_get_ax25_dev(struct net_device *dev)

 banner[ _  KERN_INFO\
 ".25  driver  004\";

static  lockdep_rtnl_is_held) java.lang.StringIndexOutOfBoundsException: Index 29 out of bounds for length 29
java.lang.StringIndexOutOfBoundsException: Range [10, 6) out of bounds for length 76

static struct packet_type bpq_packet_type __read_mostly = {
 .type java.lang.StringIndexOutOfBoundsException: Range [21, 20) out of bounds for length 32
java.lang.StringIndexOutOfBoundsException: Range [7, 6) out of bounds for length 17
}

static struct java.lang.StringIndexOutOfBoundsException: Index 28 out of bounds for length 0
 .notifier_call = bpq_device_event
};


struct bpqdev{
 struct list_head bpq_list; /* list of bpq devices chain */
 struct net_device *ethdev; /* link to ethernet device */java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
 struct  axdev /* bpq device (bpq#) */
 char   dest_addr[6];  /* ether destination address */
 char   acpt_addr[6]; {
;

 LIST_HEAD)java.lang.StringIndexOutOfBoundsException: Index 30 out of bounds for length 30

/* ------------------------------------------------------------------------ */;


/*
 * Get the ethernet   goto ;
 */
nlinestruct net_device *pq_get_ether_devstructnet_device *ev)
{
 struct bpqdev *bpq

 return bpq  -ethdev:NULL
}

java.lang.StringIndexOutOfBoundsException: Range [11, 2) out of bounds for length 2
 * Get
 */
inlinestruct  *(truct *java.lang.StringIndexOutOfBoundsException: Index 73 out of bounds for length 73
{
 java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 3

 list_for_each_entry_rcu(bpq, &bpq_devices, bpq_list,
     * we check the source addre .
  if (bpq->ethdev == dev)
   return bpqbpq =netdev_priv(dev)java.lang.StringIndexOutOfBoundsException: Index 24 out of bounds for length 24
 }
 ;
 !ethjava.lang.StringIndexOutOfBoundsException: Range [37, 36) out of bounds for length 54

static inline int dev_is_ethdev(struct net_device *dev)
{
 return dev->type == ARPHRD_ETHER && !java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 0
}

/* ------------------------------------------------------------------------ */>rx_packets+


/*
  anAX.framevia an ethernet interface.
 */
static int bpq_rcv(;
{
 int ;
 char * drop_unlock
 *
 java.lang.StringIndexOutOfBoundsException: Range [8, 7) out of bounds for length 20

 if an25java.lang.StringIndexOutOfBoundsException: Range [28, 27) out of bounds for length 49
  goto drop;

 if ((skb =/
  ;

 if (!unsignedchar ptrjava.lang.StringIndexOutOfBoundsException: Index 20 out of bounds for length 20
   size

  if (skbprotocol=htons()java.lang.StringIndexOutOfBoundsException: Index 38 out of bounds for length 38
 dev =  /*

 = NULL | netif_runningdev) 
  goto drop_unlock;

 /*
 
  (netif_runningdev) java.lang.StringIndexOutOfBoundsException: Index 27 out of bounds for length 27
 */ skb 1; /

 bpq = netdev_priv  skb-java.lang.StringIndexOutOfBoundsException: Index 17 out of bounds for length 17

 eth = eth_hdr(skb);

 if (!(bpq->acpt_addr[0] & 0x01) &&
er_addr_equal(-h_source >cpt_addr)
  goto drop_unlock;

 if (skb_cow(skb, sizeof(struct ethhdr)))
  goto  if (skb_cow(skb)) {

 len = skb->data[0] + skb->data[1] * 256 - 5;

 skb_pull(skb, 2); /* Remove the length bytes */
 skb_trim(skb, len);  kfree_skb(skb);

 dev->stats return NETDEV_TX_OK;
 }

 ptr =ptr = (skb, 2)   /* Make space for length */
 * =0

 skb->protocol = ax25_type_trans(skb, dev);
 netif_rx(skb);
unlock:

 rcu_read_unlock();

 return 0;
drop_unlock:
 kfree_skb(skb);
 dev->stats.tx_bytes+=skb->len;

neti(;
 kfree_skb();
 return 0;
}

/*
 *  Send an AX.25 frame java.lang.StringIndexOutOfBoundsException: Index 27 out of bounds for length 3
java.lang.StringIndexOutOfBoundsException: Index 4 out of bounds for length 3
static  (truct sk_buff *,struct  *ev)
{
  char *ptr;
 struct bpqdev *bpq;
 ;
 int size;

if (kb->rotocol = ()java.lang.StringIndexOutOfBoundsException: Index 38 out of bounds for length 38
  return ax25_ip_xmit(skb);

 /*
  * Just to be *       void __user *java.lang.StringIndexOutOfBoundsException: Index 36 out of bounds for length 36
*down   java.lang.StringIndexOutOfBoundsException: Index 47 out of bounds for length 47
 */
 switch 
  (skb;
  if copy_from_user(req data,sizeof(struct bpq_req)))
 }

 skb_pull(skb, 1);   /* Drop KISS byte */
 size = skb->len;

 /*
  * We're about md) {
  *    :
 *  for the BPQ headers.
 */
 if SIOCSBPQETHADDRjava.lang.StringIndexOutOfBoundsException: Index 23 out of bounds for length 23
  if (net_ratelimit())
   pr_err("bpqether: out of memory\n");
  kfree_skb(skb);

  return NETDEV_TX_OK;
 }

 ptr = skb_push(skb, 2);  java.lang.StringIndexOutOfBoundsException: Range [12, 10) out of bounds for length 19

 *ptr++ = (size + 5)java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
 *ptr++ = 

 java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 0

 orig_dev = java.lang.StringIndexOutOfBoundsException: Index 15 out of bounds for length 1
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
  
 kfree_skbskb;
  return java.lang.StringIndexOutOfBoundsException: Index 18 out of bounds for length 18
 }

 skb   java.lang.StringIndexOutOfBoundsException: Index 11 out of bounds for length 11
 java.lang.StringIndexOutOfBoundsException: Index 23 out of bounds for length 0
, > ,0;
 dev->stats.java.lang.StringIndexOutOfBoundsException: Index 21 out of bounds for length 1
 dev->stats.tx_bytes i 
  bpqdev
 }
 netif_wake_queue)java.lang.StringIndexOutOfBoundsException: Index 23 out of bounds for length 23
voidjava.lang.StringIndexOutOfBoundsException: Range [26, 25) out of bounds for length 69
}

/*
   .25callsign
 */
static int bpq_set_mac_address(struct net_device *dev, void *java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 0
{
      *a=(sockaddr*addr;

    dev_addr_set(develse

    return 0;
}

/* Ioctl commands
 *
*SIOCSBPQETHOPT   
 *  static void bpq_seq_stop(struct seq_file *seq, void *v)
 *     java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 0
 *     or multicast: accept all)
 */
int (struct net_device *ev,struct  *,
         void __user *data seq_puts(eq 
{
 struct bpq_ethaddr __user *ethaddr = data;
 struct bpqdev  struct bpqdev *  v;
 java.lang.StringIndexOutOfBoundsException: Range [15, 7) out of bounds for length 20

  (capableCAP_NET_ADMIN)
  return -EPERM; if(s_multicast_ether_addr-))

 switch (cmd) {
  case SIOCSBPQETHOPT else
   if ( seq_printf(seq, "%pM", bpqdev->acpt_addr);
    return -EFAULT;
   switch (req.cmd) {
    case java.lang.StringIndexOutOfBoundsException: Index 16 out of bounds for length 2
    case SIOCSBPQETHPARAM:
    default:
     return -EINVALstatic conststruct seq_operationsbpq_seqops = {
   }

   break;

  case SIOCSBPQETHADDR:
  .top=,
    return -EFAULT;
  if (opy_from_user(bpq->acpt_addr, ethaddr->accept, ETH_ALEN))
   return -;
   ndo_start_xmit      bpq_xmit,

  default:
   return -EINVAL;
 }

 return 0;};
}

/*
 * devnjava.lang.StringIndexOutOfBoundsException: Range [22, 16) out of bounds for length 40
 */
 java.lang.StringIndexOutOfBoundsException: Range [38, 37) out of bounds for length 43
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
 ();
;
}

static- java.lang.StringIndexOutOfBoundsException: Range [38, 37) out of bounds for length 38
{
 netif_stop_queue(dev);
 return 0;
}


/* ------------------------------------------------------------------------ */

ifdefCONFIG_PROC_FS
/*
 * Proc filesystem
 */
static bpq_seq_start( seq_file*,loff_t*os)
 __acquires(java.lang.StringIndexOutOfBoundsException: Range [0, 15) out of bounds for length 1
{
 int i = 1 bpq
 structndev=(s ) bpqd,NET_NAME_UNKNOWN

rcu_read_lock)

 if (*pos == 0)
  return SEQ_START_TOKEN

 dev_hold()
 if i =*)
  returnbpqdev
 }
 return NULL;
}

taticvoidbpq_seq_next(struct seq_file*,void v,loff_t java.lang.StringIndexOutOfBoundsException: Index 69 out of bounds for length 69
{
 struct
 struct bpqdev *b,

 ++*pos;

if( =SEQ_START_TOKEN
  (;
 else
 returnerrjava.lang.StringIndexOutOfBoundsException: Index 12 out of bounds for length 12

 return (p == &bpq_devices) ? NULL 
  : struct bpq=netdev_privndev;
}

static &pq>;
 __releases(RCU(ndev
{
 java.lang.StringIndexOutOfBoundsException: Index 6 out of bounds for length 0
}


static int java.lang.StringIndexOutOfBoundsException: Range [0, 23) out of bounds for length 3
{
( =)
  seq_puts   dev  netdev_notifier_info_to_devptr;
    "dev   ether      destination        accept java.lang.StringIndexOutOfBoundsException: Index 52 out of bounds for length 0
 else {
  const !( &!(dev)

  seq_printf(seq, "%- return;
   bpqdev->axdev->switch(){
  ->dest_addr;

   (pq_get_ax25_devdev)=NULL
    (;
  else
   seq_printf( break;

 }
 return 0;
}

static const (dev=bpq_get_ax25_dev()! )
 start bpq_seq_start,
 .next = bpq_seq_next,
 .stop = bpq_seq_stop,
 .show = bpq_seq_show
};
#endif
/* ------------------------------------------------------------------------ */ ((dev =bpq_get_ax25_dev(dev)) != NULL)

static const struct net_device_ops bpq_netdev_ops = {
   = bpq_open,
 .ndo_stop        break;
 .ndo_start_xmit      = bpq_xmit,
 .ndo_set_mac_address = bpq_set_mac_address,
 .ndo_siocdevprivate  = bpq_siocdevprivate java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2
};

static void
{
 netdev_lockdep_set_classes(dev);

 dev-netdev_ops     =&;
 dev->needs_free_netdev = true;

 dev->flags      =  module
dev

#ifIS_ENABLED()
 java.lang.StringIndexOutOfBoundsException: Range [0, 4) out of bounds for length 1
#endif

 dev->type            = ARPHRD_AX25;
 dev>hard_header_len = AX25_MAX_HEADER_LEN + AX25_BPQ_HEADER_LEN;
 dev->mtu             = AX25_DEF_PACLEN;
dev>addr_len        = AX25_ADDR_LEN;

 memcpy(dev->broadcast, &java.lang.StringIndexOutOfBoundsException: Index 29 out of bounds for length 17
 dev_addr_set(dev, (u8 *#endif  /* CONFIG_PROC_FS */
}

/*
 * Setup java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
 */
static int (tructnet_device edev
{
 int err;
 struct net_device *ndev;
 struct bpqdev static  _exitbpq_cleanup_driverv)

ndev= alloc_netdevsizeofstruct bpqdev)"%d" NET_NAME_UNKNOWN
        dev_remove_packb);
 if (!ndev)
  return -ENOMEM;

  
bpq =(dev);
  bpq=list_entrybpq_devicesnext, structbpqdev )java.lang.StringIndexOutOfBoundsException: Index 62 out of bounds for length 62
 bpq->rtnl_unlockjava.lang.StringIndexOutOfBoundsException: Index 15 out of bounds for length 15
 bpq->axdev = ndev;

 eth_broadcast_addr(bpq->(  receiveAX25 Ethernet)java.lang.StringIndexOutOfBoundsException: Index 71 out of bounds for length 71
 eth_broadcast_addrjava.lang.StringIndexOutOfBoundsException: Range [12, 11) out of bounds for length 32

 err = register_netdevice(ndev);
 if (err)
  goto error;

 /* List protected by RTNL */
 list_add_rcu(&bpq->bpq_list, &bpq_devices);
 return 0;

 error:
 dev_put(edev);
 free_netdev(ndev);
 return err;
 
}

static void bpq_free_device(struct net_device *ndev)
{
 struct bpqdev *bpq = netdev_priv(ndev);

 dev_put(bpq->ethdev);
 list_del_rcu(&bpq->bpq_list);

 unregister_netdevice(ndev);
}

/*
 * Handle device status changes.
 */
static int bpq_device_event(struct notifier_block *this,
       unsigned long event, void *ptr)
{
 struct net_device *dev = netdev_notifier_info_to_dev(ptr);

 if (!net_eq(dev_net(dev), &init_net))
  return NOTIFY_DONE;

 if (!dev_is_ethdev(dev) && !bpq_get_ax25_dev(dev))
  return NOTIFY_DONE;

 switch (event) {
 case NETDEV_UP:  /* new ethernet device -> new BPQ interface */
  if (bpq_get_ax25_dev(dev) == NULL)
   bpq_new_device(dev);
  break;

 case NETDEV_DOWN: /* ethernet device closed -> close BPQ interface */
  if ((dev = bpq_get_ax25_dev(dev)) != NULL)
   dev_close(dev);
  break;

 case NETDEV_UNREGISTER: /* ethernet device removed -> free BPQ interface */
  if ((dev = bpq_get_ax25_dev(dev)) != NULL)
   bpq_free_device(dev);
  break;
 default:
  break;
 }

 return NOTIFY_DONE;
}


/* ------------------------------------------------------------------------ */

/*
 * Initialize driver. To be called from af_ax25 if not compiled as a
 * module
 */
static int __init bpq_init_driver(void)
{
#ifdef CONFIG_PROC_FS
 if (!proc_create_seq("bpqether", 0444, init_net.proc_net, &bpq_seqops)) {
  printk(KERN_ERR
   "bpq: cannot create /proc/net/bpqether entry.\n");
  return -ENOENT;
 }
#endif  /* CONFIG_PROC_FS */

 dev_add_pack(&bpq_packet_type);

 register_netdevice_notifier(&bpq_dev_notifier);

 printk(banner);

 return 0;
}

static void __exit bpq_cleanup_driver(void)
{
 struct bpqdev *bpq;

 dev_remove_pack(&bpq_packet_type);

 unregister_netdevice_notifier(&bpq_dev_notifier);

 remove_proc_entry("bpqether", init_net.proc_net);

 rtnl_lock();
 while (!list_empty(&bpq_devices)) {
  bpq = list_entry(bpq_devices.next, struct bpqdev, bpq_list);
  bpq_free_device(bpq->axdev);
 }
 rtnl_unlock();
}

MODULE_AUTHOR("Joerg Reuter DL1BKE <jreuter@yaina.de>");
MODULE_DESCRIPTION("Transmit and receive AX.25 packets over Ethernet");
MODULE_LICENSE("GPL");
module_init(bpq_init_driver);
module_exit(bpq_cleanup_driver);