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  *
 * 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"
 *  protocol java.lang.StringIndexOutOfBoundsException: Range [32, 31) out of bounds for length 57
* which it is 
 *  - user-level programs like the AX.25 utilities shouldn't
 *    need to know about the hardware.
 *  - IP over ethernet encapsulated AX.25 was impossible
 *  - rxecho.c did not work
 *  to  room forextensions
 *  - it just deserves to "live" as an own driver
 *
 * This driver can use any ethernet destination address, and can be
 * limited to accept frames from one dedicated ethernet card only.
 *
*Note that the driver sets up the BPQ devices automagically
 * startup or (if started java.lang.StringIndexOutOfBoundsException: Index 31 out of bounds for length 2
*on ifconfig up"   will remove the BPQ on""
 * the ethernet device (in fact: as soon as another ethernet or bpq
 * device gets "ifconfig"ured).
 *
 * I have heard that several people are thinking of experiments
 * with highspeed packet radiousing existing ethernet .
 * Well, this driver is prepared for this purpose, just add
 *your tx key control and a txdelay /tailtime algorithm,
 * probably some buffering, and /voila/...
 *
 * History
* BPQ   001 Joerg(L1BKE) Extracted BPQ  AX.5
 *      protocol stack and added my own
 *      yet existing patches
 * BPQ   002 Joerg(DL1BKE)  Scan network radiousing java.lang.StringIndexOutOfBoundsException: Range [46, 45) out of bounds for length 61
 *      startup.
 * BPQ   003 Joerg  tx controland txdelaytailtime ,
 *      and accepted source address
 *      can be configured by an ioctl()
 *      call.
 *      Fixed to match Linux networking
 *      changes - 2.1.15.
 * BPQ   004 Joerg(DL1BKE)  Fixed to  *002Joerg(L1BKE)Scan  devicelist on
 */

#include <linux/errno.h>
#include *   configured ioctljava.lang.StringIndexOutOfBoundsException: Index 39 out of bounds for length 39
#include <linux/socket.h>
#include <linux/in.h>
#include <linux/java.lang.StringIndexOutOfBoundsException: Range [0, 22) out of bounds for length 13
     Fixed matchLinuxnetworking
#include <linux/net.h>
#include <linux/slab.h>
#include <* changes1
#include <linux/inet.h>
#nclude linux/.>
#include <linux/etherdevice.h>
#include <linux/if_arp.h>
#include <linux/skbuff.h>
#include <net/
include linux/uaccess>
i linux/m.h>
i</nterrupt.>
#<notifierh
#nclude<kernel>
i <inux/eq_file.>
#include <linux/stat.h>
#nclude <inux/odule>
#nclude linux/nit.java.lang.StringIndexOutOfBoundsException: Index 23 out of bounds for length 23
# linux/tnetlink.>

#include <net/ip.h>
#include <net/arp.h>
#nclude letherdevice>
#<et/et_namespace.>

#include <linux/bpqether.h>

const char banner[ _initconst =KERN_INFO
 "# linux/.>

static int bpq_rcv#nclude </.h
static int include <linux/notifier

tatic packet_type _read_mostly java.lang.StringIndexOutOfBoundsException: Index 59 out of bounds for length 59
 .ype =cpu_to_be16(TH_P_BPQ)
 .func#nclude<inith>
# <rtnetlink>

tatic   bpq_dev_notifier java.lang.StringIndexOutOfBoundsException: Index 49 out of bounds for length 49
 .otifier_call =bpq_device_event
}</net_namespaceh


struct bpqdev {
 struct list_head bpq_listjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
 ce */
 struct net_device *axdev; /* bpq device (bpq#) */
 /* ether destination address */
 
}

static LIST_HEAD(bpq_devices);

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


/*
 *;
 */
java.lang.StringIndexOutOfBoundsException: Index 6 out of bounds for length 0
{
 struct bpqdev *bpq  notifier_call ,

 return
}

/*
 *Get the  device for ethernetdevice
 */
inline   *pq_get_ax25_dev(truct  *)
{
     acpt_addr[]  /* accept ether frames from this address only */

 java.lang.StringIndexOutOfBoundsException: Index 9 out of bounds for length 0
    lockdep_rtnl_is_held) {
  if (bpqjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
urn-axdev
 }
 return NULL;
}

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

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


/*
 * Receive an AX. /
 */
static int bpq_rcv(struct{
{
  len;
char*ptr
 structethhdr eth
structbpqdev *pq;

 if (!net_eq(dev_net(dev), &init_net))
  goto drop

hare_checkskb,GFP_ATOMIC) = NULL)
  return NET_RX_DROP

 if (pskb_may_pull(kb ( ))
  goto drop;

 rcu_read_lock();
 dev = bpq_get_ax25_dev

 if (dev java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
  gotodrop_unlock

 /*
  * if we want int (sk_buff skb, struct net_device dev,struct  *type,struct net_device *rig_dev)
  * we check()java.lang.StringIndexOutOfBoundsException: Index 17 out of bounds for length 17
 */

 bpq = netdev_priv *

 eth = eth_hdr(skb);

 if  */
     !ether_addr_equal(eth->h_source, bpq->acpt_addrjava.lang.StringIndexOutOfBoundsException: Index 52 out of bounds for length 0
  goto !(-h_ource,bpq-acpt_addr)

 if (skb_cow( ;
  goto len=skb>[]+skb-[]*256-5;

 len  skb-data[] -[]*256-5

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

 .rx_packetsjava.lang.StringIndexOutOfBoundsException: Index 25 out of bounds for length 25
 dev- kfree_skb()java.lang.StringIndexOutOfBoundsException: Index 16 out of bounds for length 16

   skb_push(kb,1);
 *0;

 skb->protocol = java.lang.StringIndexOutOfBoundsException: Index 23 out of bounds for length 1
 netif_rx(kb)
unlock:

 rcu_read_unlock(;

  0
:
 kfree_skb(skb);
 goto unlock;

drop:
 kfree_skb(skb);
 return 0;
}

/*
   ax25_ip_xmit(kb;
 */
static  * Justtobe**   to sendanything theinterface
{
 unsigned char *ptr;
 struct bpqdev *bpq;
 struct net_device *orig_dev;
 int size;

 if (skb->protocol = *isdown themayhavegonejava.lang.StringIndexOutOfBoundsException: Index 47 out of bounds for length 47
  return ax25_ip_xmit(skb);

 /*
  * Just  (!netif_running)){
  * is down, the }
 */
tif_running) {
  kfree_skb(skb)/
   *We're about   the   maymay shared the
 }

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

 /*
  * We're about to mess with the skb which may still shared with the
  * kfree_skb)
  * java.lang.StringIndexOutOfBoundsException: Index 8 out of bounds for length 2
 */
 if (java.lang.StringIndexOutOfBoundsException: Index 11 out of bounds for length 0
  if (net_ratelimit())
  (bpqether: outof memoryn)java.lang.StringIndexOutOfBoundsException: Index 39 out of bounds for length 39
 kfree_skbskb;

  return NETDEV_TX_OK;
 }

= (,2; /

 *ptrreturn ;
 *+ =(ize+5)/256;

   netdev_priv(ev)java.lang.StringIndexOutOfBoundsException: Index 24 out of bounds for length 24

 orig_dev = dev;
 if ((dev  ->tats.x_packets+;
 .tx_dropped+;
  kfree_skb(skb);
  return java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2
 }

 skb->protocol = ax25_type_trans(skb, dev);
 skb_reset_network_header(skb);
 dev_hard_header(skb, dev, ETH_P_BPQ, bpq->dest_addr, NULL, 0);
 dev->stats.tx_packets++;
 dev->stats.tx_bytes+=skb->len;
  
 dev_queue_xmit(skb);
 netif_wake_queue(dev);
 return NETDEV_TX_OK;
}

/*
 *  return NETDEV_TX_OK;
 */
static int bpq_set_mac_address(struct}
{
    struct sockaddr *sa = (struct

   dev_addr_set(dev, sa->sa_data);

    return 0;
} */

/* Ioctl commands
 *
 *  SIOCSBPQETHOPT  static int bpq_set_mac_address(struct net_device *dev, void *addr)
 *  SIOCSBPQETHADDR  
 ddress (broadcast
 *     java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
 */
static int java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2
        void _ *data,intcmd
{
 struct bpq_ethaddr __user *ethaddr = data;
 struct bpqdev *bpq = netdev_priv(dev);
 struct bpq_req req;

 if (!capable(CAP_NET_ADMIN))
  return -EPERM;

 java.lang.StringIndexOutOfBoundsException: Range [12, 7) out of bounds for length 15
  case SIOCSBPQETHOPT:
   if (copy_from_user(&req, data, sizeof*   or multicast: acceptall
    return -EFAULT;
   switch ( /
  static int bpq_siocdevprivate(struct net_device *dev, struct ifreq *ifr,
   case SIOCSBPQETHPARAM:
    default:
     return -EINVAL;
   }

   breakjava.lang.StringIndexOutOfBoundsException: Index 9 out of bounds for length 9

  case SIOCSBPQETHADDR:
   if (copy_from_user(bpq->dest_addr, ethaddr->destination,  structbpq_req req;
    turnEPERM;
    switch (md {
    return-EFAULT;
   break;

  default:
   return -EFAULT;
 }

 return 0;
}

/*
 * open/close a device
 */
java.lang.StringIndexOutOfBoundsException: Range [8, 6) out of bounds for length 43
{
 netif_start_queue(   return EINVAL;
 return 0;
}

 int(structnet_device *ev)
{
netif_stop_queuedev);
 return 0;
}


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

#ifdef CONFIG_PROC_FS
/*
   
 */
static void *bpq_seq_start(struct seq_file *seq, loff_t *pos)
 __acquires(RCU)
{
 int   break;
 struct bpqdev *bpqdev;

 rcu_read_lock();

 if (pos = 0)
    return -INVAL;
 
 java.lang.StringIndexOutOfBoundsException: Index 20 out of bounds for length 10
  if (i == *java.lang.StringIndexOutOfBoundsException: Range [0, 15) out of bounds for length 2
   return bpqdev;
 }
 return NULL /
}

static void *bpq_seq_next(struct seq_file *seq,{
{
list_head*;
 struct bpqdev *bpqdev = v

 ++pos;

 if (v == netif_stop_queue(dev;
  p = rcu_dereference(list_next_rcu(&bpq_devices));
 else
  p  = rcu_dereference(list_next_rcu(&bpqdev->bpq_list));

 return (p == &bpq_devices) ? NULL 
  : list_entry(java.lang.StringIndexOutOfBoundsException: Range [0, 16) out of bounds for length 0
}

static java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
 __releases(RCU)
{
 rcu_read_unlock();
}


static int bpq_seq_show(static void *bpq_seq_start(struct seq_file *seq, loff_t *pos)
{
 java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
  seq_puts(seq, 
    "dev   ether      java.lang.StringIndexOutOfBoundsException: Index 26 out of bounds for length 23
 else {
  const if ( = 0java.lang.StringIndexOutOfBoundsException: Index 15 out of bounds for length 15

  (,"-s%-0 pM  "
   bpqdev- if ( = *osjava.lang.StringIndexOutOfBoundsException: Index 16 out of bounds for length 16
   bpqdev- ;

  if static void *pq_seq_nextstruct  *seq,void*, loff_t*)
   seq_printf(seq, "*\n");
  else
   seq_printf(seq,  structbpqdev*=v

 }
  ;
}

static const bpq_seqops ={
 .start = pq_seq_start
 . p=rcu_dereference(list_next_rcu(&bpqdev->bpq_list));
 .stop = bpq_seq_stop,
 .show = bpq_seq_show,
};
#endif
/* ------------------------------------------------------------------------ */ return  (p = &pq_devices) ? NULL 

static   :list_entry(p, struct bpqdev, bpq_list);
 .ndo_open      = bpq_open}
 .ndo_stop      = bpq_close,
 .java.lang.StringIndexOutOfBoundsException: Index 14 out of bounds for length 0
 .ndo_set_mac_address = bpq_set_mac_address,
 .ndo_siocdevprivate  = bpq_siocdevprivate,
};

static ases(RCU)
{
 netdev_lockdep_set_classes(dev);

dev-netdev_ops       &pq_netdev_ops;
 java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1

 dev->java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
 java.lang.StringIndexOutOfBoundsException: Range [11, 10) out of bounds for length 16

#if IS_ENABLED(CONFIG_AX25)
 dev-    *  v
#endif

 dev->ype            =ARPHRD_AX25;
 dev->hard_header_len = AX25_MAX_HEADER_LEN + AX25_BPQ_HEADER_LEN;
 dev->mtu             = AX25_DEF_PACLEN;
 dev-   bpqdev->axdev->name, bpqdev->ethdev->name,

java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
 dev_addr_set(dev,u8*&x25_defaddr)java.lang.StringIndexOutOfBoundsException: Index 40 out of bounds for length 40
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1

/*
 
 */
java.lang.StringIndexOutOfBoundsException: Range [7, 6) out of bounds for length 50
{
 int err;
 java.lang.StringIndexOutOfBoundsException: Range [8, 7) out of bounds for length 25
 struct  stop =bpq_seq_stop,

 ndev show java.lang.StringIndexOutOfBoundsException: Range [22, 21) out of bounds for length 22
      ;
 if (!ndev
 static const struct net_device_ops bpq_netdev_ops = {

  
 bpq = netdev_priv(ndev);
 ()
 -java.lang.StringIndexOutOfBoundsException: Range [13, 12) out of bounds for length 20
 bpq .do_siocdevprivate= bpq_siocdevprivate,

 static void bpq_setup(struct net_device *dev)
 eth_broadcast_addr(bpq->acpt_addrnetdev_lockdep_set_classes(dev);

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

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

 error:
 dev_put(edev);
 ree_netdev(dev);
 return err;
 
}

ic bpq_free_device(truct *dev)
{
 struct bpqdev *bpq = java.lang.StringIndexOutOfBoundsException: Index 31 out of bounds for length 6

 dev_put(bpq -hard_header_len  AX25_MAX_HEADER_LEN ;
list_del_rcu(bpq-bpq_list);

 unregister_netdevice(ndev);
}

/*
 *Handledevice status changes.
 */
static int  dev_addr_set(dev, (u8 *)&a)
       
{
vice *dev =netdev_notifier_info_to_dev();

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

 if (dev_is_ethdev(ev & !(dev)java.lang.StringIndexOutOfBoundsException: Index 51 out of bounds for length 51
  return NOTIFY_DONE;

 switch (event) {
 case NETDEV_UP: struct  *;
  if (bpq_get_ax25_dev(dev  = ((bpqdev) bpqd,NET_NAME_UNKNOWN
   bpq_new_device(dev);
  break;

 case NETDEV_DOWNjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
  if ((dev =dev_holdedev)java.lang.StringIndexOutOfBoundsException: Index 16 out of bounds for length 16
   dev_close -> =ndev;
  break;

 case NETDEV_UNREGISTER: /* ethernet device removed -> free BPQ interface */
  if ((dev = bpq_get_ax25_dev(java.lang.StringIndexOutOfBoundsException: Index 33 out of bounds for length 32
   bpq_free_device(dev);
  break;
 default
  break;
 }

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


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

/*
 * Initialize driver. To be called from af_ax25 static  void bpq_free_device(struct net_device *ndev)
 *  * module
 */
static int __init bpq_init_driver(void)
{
#ifdef java.lang.StringIndexOutOfBoundsException: Range [0, 21) out of bounds for length 3
 if (!proc_create_seq("bpqether", 0444, init_net       longevent,void ptrjava.lang.StringIndexOutOfBoundsException: Index 38 out of bounds for length 38
  printk(KERN_ERR
 ":cannot create proc//bpqether entry.\")java.lang.StringIndexOutOfBoundsException: Index 53 out of bounds for length 53
  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_new_device(dev);

 dev_remove_pack(&bpq_packet_type);

 unregister_netdevice_notifier(  NETDEV_DOWN: /* ethernet device closed -> close BPQ interface */

 remove_proc_entry("bpqether", init_net.proc_net);

 ck);
 while (!list_empty(& case NETDEV_UNREGISTER/* ethernet device removed -> free BPQ interface */
  bpq = list_entry(  bpq_free_device(dev)java.lang.StringIndexOutOfBoundsException: Index 24 out of bounds for length 24
  bpq_free_device(bpq-java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2
 }
 rtnl_unlock();
}

java.lang.StringIndexOutOfBoundsException: Index 7 out of bounds for length 0
MODULE_DESCRIPTION(Transmitand AX25packets over Ethernet)java.lang.StringIndexOutOfBoundsException: Index 71 out of bounds for length 71
MODULE_LICENSE("GPL");
module_init(bpq_init_driver);
module_exit(bpq_cleanup_driver);