[PATCH] Delete superfluous source file "net/wanrouter/af_wanpipe.c".

[Robert P. J. Day]

  Delete the apparently superfluous source file
net/wanrouter/af_wanpipe.c.

Signed-off-by: Robert P. J. Day <rpjday@xxxxxxxxxxxxxx>

---

diff --git a/net/wanrouter/af_wanpipe.c b/net/wanrouter/af_wanpipe.c
deleted file mode 100644
index 41d7e32..0000000
--- a/net/wanrouter/af_wanpipe.c
+++ /dev/null
@@ -1,2600 +0,0 @@
-/*****************************************************************************
-* af_wanpipe.c	WANPIPE(tm) Secure Socket Layer.
-*
-* Author:	Nenad Corbic	<ncorbic@xxxxxxxxxxx>
-*
-* Copyright:	(c) 2000 Sangoma Technologies Inc.
-*
-*		This program is free software; you can redistribute it and/or
-*		modify it under the terms of the GNU General Public License
-*		as published by the Free Software Foundation; either version
-*		2 of the License, or (at your option) any later version.
-* ============================================================================
-* Due Credit:
-*               Wanpipe socket layer is based on Packet and
-*               the X25 socket layers. The above sockets were
-*               used for the specific use of Sangoma Technologies
-*               API programs.
-*               Packet socket Authors: Ross Biro, Fred N. van Kempen and
-*                                      Alan Cox.
-*               X25 socket Author: Jonathan Naylor.
-* ============================================================================
-* Mar 15, 2002  Arnaldo C. Melo  o Use wp_sk()->num, as it isnt anymore in sock
-* Apr 25, 2000  Nenad Corbic     o Added the ability to send zero length packets.
-* Mar 13, 2000  Nenad Corbic	 o Added a tx buffer check via ioctl call.
-* Mar 06, 2000  Nenad Corbic     o Fixed the corrupt sock lcn problem.
-*                                  Server and client application can run
-*                                  simultaneously without conflicts.
-* Feb 29, 2000  Nenad Corbic     o Added support for PVC protocols, such as
-*                                  CHDLC, Frame Relay and HDLC API.
-* Jan 17, 2000 	Nenad Corbic	 o Initial version, based on AF_PACKET socket.
-*			           X25API support only.
-*
-******************************************************************************/
-
-#include <linux/types.h>
-#include <linux/sched.h>
-#include <linux/mm.h>
-#include <linux/capability.h>
-#include <linux/fcntl.h>
-#include <linux/socket.h>
-#include <linux/in.h>
-#include <linux/inet.h>
-#include <linux/netdevice.h>
-#include <linux/poll.h>
-#include <linux/wireless.h>
-#include <linux/kmod.h>
-#include <net/ip.h>
-#include <net/protocol.h>
-#include <linux/skbuff.h>
-#include <net/sock.h>
-#include <linux/errno.h>
-#include <linux/timer.h>
-#include <asm/system.h>
-#include <asm/uaccess.h>
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/if_wanpipe.h>
-#include <linux/pkt_sched.h>
-#include <linux/tcp_states.h>
-#include <linux/if_wanpipe_common.h>
-
-#ifdef CONFIG_INET
-#include <net/inet_common.h>
-#endif
-
-#define SLOW_BACKOFF 0.1*HZ
-#define FAST_BACKOFF 0.01*HZ
-
-//#define PRINT_DEBUG
-#ifdef PRINT_DEBUG
-	#define DBG_PRINTK(format, a...) printk(format, ## a)
-#else
-	#define DBG_PRINTK(format, a...)
-#endif
-
-
-/* SECURE SOCKET IMPLEMENTATION
- *
- *   TRANSMIT:
- *
- *      When the user sends a packet via send() system call
- *      the wanpipe_sendmsg() function is executed.
- *
- *      Each packet is enqueud into sk->sk_write_queue transmit
- *      queue. When the packet is enqueued, a delayed transmit
- *      timer is triggerd which acts as a Bottom Half hander.
- *
- *      wanpipe_delay_transmit() function (BH), dequeues packets
- *      from the sk->sk_write_queue transmit queue and sends it
- *      to the deriver via dev->hard_start_xmit(skb, dev) function.
- *      Note, this function is actual a function pointer of if_send()
- *      routine in the wanpipe driver.
- *
- *      X25API GUARANTEED DELIVERY:
- *
- *         In order to provide 100% guaranteed packet delivery,
- *         an atomic 'packet_sent' counter is implemented.  Counter
- *         is incremented for each packet enqueued
- *         into sk->sk_write_queue.  Counter is decremented each
- *         time wanpipe_delayed_transmit() function successfuly
- *         passes the packet to the driver. Before each send(), a poll
- *         routine checks the sock resources The maximum value of
- *         packet sent counter is 1, thus if one packet is queued, the
- *         application will block until that packet is passed to the
- *         driver.
- *
- *   RECEIVE:
- *
- *      Wanpipe device drivers call the socket bottom half
- *      function, wanpipe_rcv() to queue the incoming packets
- *      into an AF_WANPIPE socket queue.  Based on wanpipe_rcv()
- *      return code, the driver knows whether the packet was
- *      successfully queued.  If the socket queue is full,
- *      protocol flow control is used by the driver, if any,
- *      to slow down the traffic until the sock queue is free.
- *
- *      Every time a packet arrives into a socket queue the
- *      socket wakes up processes which are waiting to receive
- *      data.
- *
- *      If the socket queue is full, the driver sets a block
- *      bit which signals the socket to kick the wanpipe driver
- *      bottom half hander when the socket queue is partialy
- *      empty. wanpipe_recvmsg() function performs this action.
- *
- *      In case of x25api, packets will never be dropped, since
- *      flow control is available.
- *
- *      In case of streaming protocols like CHDLC, packets will
- *      be dropped but the statistics will be generated.
- */
-
-
-/* The code below is used to test memory leaks. It prints out
- * a message every time kmalloc and kfree system calls get executed.
- * If the calls match there is no leak :)
- */
-
-/***********FOR DEBUGGING PURPOSES*********************************************
-#define KMEM_SAFETYZONE 8
-
-static void * dbg_kmalloc(unsigned int size, int prio, int line) {
-	void * v = kmalloc(size,prio);
-	printk(KERN_INFO "line %d  kmalloc(%d,%d) = %p\n",line,size,prio,v);
-	return v;
-}
-static void dbg_kfree(void * v, int line) {
-	printk(KERN_INFO "line %d  kfree(%p)\n",line,v);
-	kfree(v);
-}
-
-#define kmalloc(x,y) dbg_kmalloc(x,y,__LINE__)
-#define kfree(x) dbg_kfree(x,__LINE__)
-******************************************************************************/
-
-
-/* List of all wanpipe sockets. */
-HLIST_HEAD(wanpipe_sklist);
-static DEFINE_RWLOCK(wanpipe_sklist_lock);
-
-atomic_t wanpipe_socks_nr;
-static unsigned long wanpipe_tx_critical;
-
-#if 0
-/* Private wanpipe socket structures. */
-struct wanpipe_opt
-{
-	void   *mbox;		/* Mail box  */
-	void   *card; 		/* Card bouded to */
-	struct net_device *dev;	/* Bounded device */
-	unsigned short lcn;	/* Binded LCN */
-	unsigned char  svc;	/* 0=pvc, 1=svc */
-	unsigned char  timer;   /* flag for delayed transmit*/
-	struct timer_list tx_timer;
-	unsigned poll_cnt;
-	unsigned char force;	/* Used to force sock release */
-	atomic_t packet_sent;
-};
-#endif
-
-static int sk_count;
-extern const struct proto_ops wanpipe_ops;
-static unsigned long find_free_critical;
-
-static void wanpipe_unlink_driver(struct sock *sk);
-static void wanpipe_link_driver(struct net_device *dev, struct sock *sk);
-static void wanpipe_wakeup_driver(struct sock *sk);
-static int execute_command(struct sock *, unsigned char, unsigned int);
-static int check_dev(struct net_device *dev, sdla_t *card);
-struct net_device *wanpipe_find_free_dev(sdla_t *card);
-static void wanpipe_unlink_card (struct sock *);
-static int wanpipe_link_card (struct sock *);
-static struct sock *wanpipe_make_new(struct sock *);
-static struct sock *wanpipe_alloc_socket(void);
-static inline int get_atomic_device(struct net_device *dev);
-static int wanpipe_exec_cmd(struct sock *, int, unsigned int);
-static int get_ioctl_cmd (struct sock *, void *);
-static int set_ioctl_cmd (struct sock *, void *);
-static void release_device(struct net_device *dev);
-static void wanpipe_kill_sock_timer (unsigned long data);
-static void wanpipe_kill_sock_irq (struct sock *);
-static void wanpipe_kill_sock_accept (struct sock *);
-static int wanpipe_do_bind(struct sock *sk, struct net_device *dev,
-			   int protocol);
-struct sock * get_newsk_from_skb (struct sk_buff *);
-static int wanpipe_debug (struct sock *, void *);
-static void wanpipe_delayed_transmit (unsigned long data);
-static void release_driver(struct sock *);
-static void start_cleanup_timer (struct sock *);
-static void check_write_queue(struct sock *);
-static int check_driver_busy (struct sock *);
-
-/*============================================================
- * wanpipe_rcv
- *
- *	Wanpipe socket bottom half handler.  This function
- *      is called by the WANPIPE device drivers to queue a
- *      incoming packet into the socket receive queue.
- *      Once the packet is queued, all processes waiting to
- *      read are woken up.
- *
- *      During socket bind, this function is bounded into
- *      WANPIPE driver private.
- *===========================================================*/
-
-static int wanpipe_rcv(struct sk_buff *skb, struct net_device *dev,
-		       struct sock *sk)
-{
-	struct wan_sockaddr_ll *sll = (struct wan_sockaddr_ll*)skb->cb;
-	wanpipe_common_t *chan = dev->priv;
-	/*
-	 *	When we registered the protocol we saved the socket in the data
-	 *	field for just this event.
-	 */
-
-	skb->dev = dev;
-
-	sll->sll_family = AF_WANPIPE;
-	sll->sll_hatype = dev->type;
-	sll->sll_protocol = skb->protocol;
-	sll->sll_pkttype = skb->pkt_type;
-	sll->sll_ifindex = dev->ifindex;
-	sll->sll_halen = 0;
-
-	if (dev->hard_header_parse)
-		sll->sll_halen = dev->hard_header_parse(skb, sll->sll_addr);
-
-	/*
-	 * WAN_PACKET_DATA : Data which should be passed up the receive queue.
-	 * WAN_PACKET_ASYC : Asynchronous data like place call, which should
-	 *                   be passed up the listening sock.
-	 * WAN_PACKET_ERR  : Asynchronous data like clear call or restart
-	 *                   which should go into an error queue.
-	 */
-	switch (skb->pkt_type){
-
-		case WAN_PACKET_DATA:
-			if (sock_queue_rcv_skb(sk,skb)<0){
-				return -ENOMEM;
-			}
-			break;
-		case WAN_PACKET_CMD:
-			sk->sk_state = chan->state;
-			/* Bug fix: update Mar6.
-			 * Do not set the sock lcn number here, since
-			 * cmd is not guaranteed to be executed on the
-			 * board, thus Lcn could be wrong */
-			sk->sk_data_ready(sk, skb->len);
-			kfree_skb(skb);
-			break;
-		case WAN_PACKET_ERR:
-			sk->sk_state = chan->state;
-			if (sock_queue_err_skb(sk,skb)<0){
-				return -ENOMEM;
-			}
-			break;
-		default:
-			printk(KERN_INFO "wansock: BH Illegal Packet Type Dropping\n");
-			kfree_skb(skb);
-			break;
-	}
-
-//??????????????????????
-//	if (sk->sk_state == WANSOCK_DISCONNECTED){
-//		if (sk->sk_zapped) {
-//			//printk(KERN_INFO "wansock: Disconnected, killing early\n");
-//			wanpipe_unlink_driver(sk);
-//			sk->sk_bound_dev_if = 0;
-//		}
-//	}
-
-	return 0;
-}
-
-/*============================================================
- * wanpipe_listen_rcv
- *
- *	Wanpipe LISTEN socket bottom half handler.  This function
- *      is called by the WANPIPE device drivers to queue an
- *      incoming call into the socket listening queue.
- *      Once the packet is queued, the waiting accept() process
- *      is woken up.
- *
- *      During socket bind, this function is bounded into
- *      WANPIPE driver private.
- *
- *      IMPORTANT NOTE:
- *          The accept call() is waiting for an skb packet
- *          which contains a pointer to a device structure.
- *
- *          When we do a bind to a device structre, we
- *          bind a newly created socket into "chan->sk".  Thus,
- *          when accept receives the skb packet, it will know
- *          from which dev it came form, and in turn it will know
- *          the address of the new sock.
- *
- *  	NOTE: This function gets called from driver ISR.
- *===========================================================*/
-
-static int wanpipe_listen_rcv (struct sk_buff *skb,  struct sock *sk)
-{
-	wanpipe_opt *wp = wp_sk(sk), *newwp;
-	struct wan_sockaddr_ll *sll = (struct wan_sockaddr_ll*)skb->cb;
-	struct sock *newsk;
-	struct net_device *dev;
-	sdla_t *card;
-	mbox_cmd_t *mbox_ptr;
-	wanpipe_common_t *chan;
-
-	/* Find a free device, if none found, all svc's are busy
-	 */
-
-	card = (sdla_t*)wp->card;
-	if (!card){
-		printk(KERN_INFO "wansock: LISTEN ERROR, No Card\n");
-		return -ENODEV;
-	}
-
-	dev = wanpipe_find_free_dev(card);
-	if (!dev){
-		printk(KERN_INFO "wansock: LISTEN ERROR, No Free Device\n");
-		return -ENODEV;
-	}
-
-	chan=dev->priv;
-	chan->state = WANSOCK_CONNECTING;
-
-	/* Allocate a new sock, which accept will bind
-	 * and pass up to the user
-	 */
-	if ((newsk = wanpipe_make_new(sk)) == NULL){
-		release_device(dev);
-		return -ENOMEM;
-	}
-
-
-	/* Initialize the new sock structure
-	 */
-	newsk->sk_bound_dev_if = dev->ifindex;
-	newwp = wp_sk(newsk);
-	newwp->card = wp->card;
-
-	/* Insert the sock into the main wanpipe
-	 * sock list.
-	 */
-	atomic_inc(&wanpipe_socks_nr);
-
-	/* Allocate and fill in the new Mail Box. Then
-	 * bind the mail box to the sock. It will be
-	 * used by the ioctl call to read call information
-	 * and to execute commands.
-	 */
-	if ((mbox_ptr = kzalloc(sizeof(mbox_cmd_t), GFP_ATOMIC)) == NULL) {
-		wanpipe_kill_sock_irq (newsk);
-		release_device(dev);
-		return -ENOMEM;
-	}
-	memcpy(mbox_ptr,skb->data,skb->len);
-
-	/* Register the lcn on which incoming call came
-	 * from. Thus, if we have to clear it, we know
-	 * which lcn to clear
-	 */
-
-	newwp->lcn = mbox_ptr->cmd.lcn;
-	newwp->mbox = (void *)mbox_ptr;
-
-	DBG_PRINTK(KERN_INFO "NEWSOCK : Device %s, bind to lcn %i\n",
-			dev->name,mbox_ptr->cmd.lcn);
-
-	chan->lcn = mbox_ptr->cmd.lcn;
-	card->u.x.svc_to_dev_map[(chan->lcn%MAX_X25_LCN)] = dev;
-
-	sock_reset_flag(newsk, SOCK_ZAPPED);
-	newwp->num = htons(X25_PROT);
-
-	if (wanpipe_do_bind(newsk, dev, newwp->num)) {
-		wanpipe_kill_sock_irq (newsk);
-		release_device(dev);
-		return -EINVAL;
-	}
-	newsk->sk_state = WANSOCK_CONNECTING;
-
-
-	/* Fill in the standard sock address info */
-
-	sll->sll_family = AF_WANPIPE;
-	sll->sll_hatype = dev->type;
-	sll->sll_protocol = skb->protocol;
-	sll->sll_pkttype = skb->pkt_type;
-	sll->sll_ifindex = dev->ifindex;
-	sll->sll_halen = 0;
-
-	skb->dev = dev;
-	sk->sk_ack_backlog++;
-
-	/* We must do this manually, since the sock_queue_rcv_skb()
-	 * function sets the skb->dev to NULL.  However, we use
-	 * the dev field in the accept function.*/
-	if (atomic_read(&sk->sk_rmem_alloc) + skb->truesize >=
-	    (unsigned)sk->sk_rcvbuf) {
-
-		wanpipe_unlink_driver(newsk);
-		wanpipe_kill_sock_irq (newsk);
-		--sk->sk_ack_backlog;
-		return -ENOMEM;
-	}
-
-	skb_set_owner_r(skb, sk);
-	skb_queue_tail(&sk->sk_receive_queue, skb);
-	sk->sk_data_ready(sk, skb->len);
-
-	return 0;
-}
-
-
-
-/*============================================================
- * wanpipe_make_new
- *
- *	Create a new sock, and allocate a wanpipe private
- *      structure to it. Also, copy the important data
- *      from the original sock to the new sock.
- *
- *      This function is used by wanpipe_listen_rcv() listen
- *      bottom half handler.  A copy of the listening sock
- *      is created using this function.
- *
- *===========================================================*/
-
-static struct sock *wanpipe_make_new(struct sock *osk)
-{
-	struct sock *sk;
-
-	if (osk->sk_type != SOCK_RAW)
-		return NULL;
-
-	if ((sk = wanpipe_alloc_socket()) == NULL)
-		return NULL;
-
-	sk->sk_type	= osk->sk_type;
-	sk->sk_socket	= osk->sk_socket;
-	sk->sk_priority	= osk->sk_priority;
-	sk->sk_protocol	= osk->sk_protocol;
-	wp_sk(sk)->num	= wp_sk(osk)->num;
-	sk->sk_rcvbuf	= osk->sk_rcvbuf;
-	sk->sk_sndbuf	= osk->sk_sndbuf;
-	sk->sk_state	= WANSOCK_CONNECTING;
-	sk->sk_sleep	= osk->sk_sleep;
-
-	if (sock_flag(osk, SOCK_DBG))
-		sock_set_flag(sk, SOCK_DBG);
-
-	return sk;
-}
-
-/*
- * FIXME: wanpipe_opt has to include a sock in its definition and stop using
- * sk_protinfo, but this code is not even compilable now, so lets leave it for
- * later.
- */
-static struct proto wanpipe_proto = {
-	.name	  = "WANPIPE",
-	.owner	  = THIS_MODULE,
-	.obj_size = sizeof(struct sock),
-};
-
-/*============================================================
- * wanpipe_make_new
- *
- *	Allocate memory for the a new sock, and sock
- *      private data.
- *
- *	Increment the module use count.
- *
- *      This function is used by wanpipe_create() and
- *      wanpipe_make_new() functions.
- *
- *===========================================================*/
-
-static struct sock *wanpipe_alloc_socket(void)
-{
-	struct sock *sk;
-	struct wanpipe_opt *wan_opt;
-
-	if ((sk = sk_alloc(PF_WANPIPE, GFP_ATOMIC, &wanpipe_proto, 1)) == NULL)
-		return NULL;
-
-	if ((wan_opt = kzalloc(sizeof(struct wanpipe_opt), GFP_ATOMIC)) == NULL) {
-		sk_free(sk);
-		return NULL;
-	}
-
-	wp_sk(sk) = wan_opt;
-
-	/* Use timer to send data to the driver. This will act
-	 * as a BH handler for sendmsg functions */
-	init_timer(&wan_opt->tx_timer);
-	wan_opt->tx_timer.data	   = (unsigned long)sk;
-	wan_opt->tx_timer.function = wanpipe_delayed_transmit;
-
-	sock_init_data(NULL, sk);
-	return sk;
-}
-
-
-/*============================================================
- * wanpipe_sendmsg
- *
- *	This function implements a sendto() system call,
- *      for AF_WANPIPE socket family.
- *      During socket bind() sk->sk_bound_dev_if is initialized
- *      to a correct network device. This number is used
- *      to find a network device to which the packet should
- *      be passed to.
- *
- *      Each packet is queued into sk->sk_write_queue and
- *      delayed transmit bottom half handler is marked for
- *      execution.
- *
- *      A socket must be in WANSOCK_CONNECTED state before
- *      a packet is queued into sk->sk_write_queue.
- *===========================================================*/
-
-static int wanpipe_sendmsg(struct kiocb *iocb, struct socket *sock,
-			   struct msghdr *msg, int len)
-{
-	wanpipe_opt *wp;
-	struct sock *sk = sock->sk;
-	struct wan_sockaddr_ll *saddr=(struct wan_sockaddr_ll *)msg->msg_name;
-	struct sk_buff *skb;
-	struct net_device *dev;
-	unsigned short proto;
-	unsigned char *addr;
-	int ifindex, err, reserve = 0;
-
-
-	if (!sock_flag(sk, SOCK_ZAPPED))
-		return -ENETDOWN;
-
-	if (sk->sk_state != WANSOCK_CONNECTED)
-		return -ENOTCONN;
-
-	if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_CMSG_COMPAT))
-		return(-EINVAL);
-
-	/* it was <=, now one can send
-	 * zero length packets */
-	if (len < sizeof(x25api_hdr_t))
-		return -EINVAL;
-
-	wp = wp_sk(sk);
-
-	if (saddr == NULL) {
-		ifindex	= sk->sk_bound_dev_if;
-		proto	= wp->num;
-		addr	= NULL;
-
-	}else{
-		if (msg->msg_namelen < sizeof(struct wan_sockaddr_ll)){
-			return -EINVAL;
-		}
-
-		ifindex = sk->sk_bound_dev_if;
-		proto	= saddr->sll_protocol;
-		addr	= saddr->sll_addr;
-	}
-
-	dev = dev_get_by_index(ifindex);
-	if (dev == NULL){
-		printk(KERN_INFO "wansock: Send failed, dev index: %i\n",ifindex);
-		return -ENXIO;
-	}
-	dev_put(dev);
-
-	if (sock->type == SOCK_RAW)
-		reserve = dev->hard_header_len;
-
-	if (len > dev->mtu+reserve){
-		return -EMSGSIZE;
-	}
-
-	skb = sock_alloc_send_skb(sk, len + LL_RESERVED_SPACE(dev),
-				msg->msg_flags & MSG_DONTWAIT, &err);
-
-	if (skb==NULL){
-		goto out_unlock;
-	}
-
-	skb_reserve(skb, LL_RESERVED_SPACE(dev));
-	skb->nh.raw = skb->data;
-
-	/* Returns -EFAULT on error */
-	err = memcpy_fromiovec(skb_put(skb,len), msg->msg_iov, len);
-	if (err){
-		goto out_free;
-	}
-
-	if (dev->hard_header) {
-		int res;
-		err = -EINVAL;
-		res = dev->hard_header(skb, dev, ntohs(proto), addr, NULL, len);
-		if (res<0){
-			goto out_free;
-		}
-	}
-
-	skb->protocol = proto;
-	skb->dev = dev;
-	skb->priority = sk->sk_priority;
-	skb->pkt_type = WAN_PACKET_DATA;
-
-	err = -ENETDOWN;
-	if (!(dev->flags & IFF_UP))
-		goto out_free;
-
-	if (atomic_read(&sk->sk_wmem_alloc) + skb->truesize >
-	    (unsigned int)sk->sk_sndbuf){
-		kfree_skb(skb);
-		return -ENOBUFS;
-	}
-
-	skb_queue_tail(&sk->sk_write_queue,skb);
-	atomic_inc(&wp->packet_sent);
-
-	if (!(test_and_set_bit(0, &wp->timer)))
-		mod_timer(&wp->tx_timer, jiffies + 1);
-
-	return(len);
-
-out_free:
-	kfree_skb(skb);
-out_unlock:
-	return err;
-}
-
-/*============================================================
- * wanpipe_delayed_tarnsmit
- *
- *	Transmit bottom half handler. It dequeues packets
- *      from sk->sk_write_queue and passes them to the
- *      driver.  If the driver is busy, the packet is
- *      re-enqueued.
- *
- *      Packet Sent counter is decremented on successful
- *      transmission.
- *===========================================================*/
-
-
-static void wanpipe_delayed_transmit (unsigned long data)
-{
-	struct sock *sk=(struct sock *)data;
-	struct sk_buff *skb;
-	wanpipe_opt *wp = wp_sk(sk);
-	struct net_device *dev = wp->dev;
-	sdla_t *card = (sdla_t*)wp->card;
-
-	if (!card || !dev){
-		clear_bit(0, &wp->timer);
-		DBG_PRINTK(KERN_INFO "wansock: Transmit delay, no dev or card\n");
-		return;
-	}
-
-	if (sk->sk_state != WANSOCK_CONNECTED || !sock_flag(sk, SOCK_ZAPPED)) {
-		clear_bit(0, &wp->timer);
-		DBG_PRINTK(KERN_INFO "wansock: Tx Timer, State not CONNECTED\n");
-		return;
-	}
-
-	/* If driver is executing command, we must offload
-	 * the board by not sending data. Otherwise a
-	 * pending command will never get a free buffer
-	 * to execute */
-	if (atomic_read(&card->u.x.command_busy)){
-		wp->tx_timer.expires = jiffies + SLOW_BACKOFF;
-		add_timer(&wp->tx_timer);
-		DBG_PRINTK(KERN_INFO "wansock: Tx Timer, command bys BACKOFF\n");
-		return;
-	}
-
-
-	if (test_and_set_bit(0,&wanpipe_tx_critical)){
-		printk(KERN_INFO "WanSock: Tx timer critical %s\n",dev->name);
-		wp->tx_timer.expires = jiffies + SLOW_BACKOFF;
-		add_timer(&wp->tx_timer);
-		return;
-	}
-
-	/* Check for a packet in the fifo and send */
-	if ((skb = skb_dequeue(&sk->sk_write_queue)) != NULL){
-
-		if (dev->hard_start_xmit(skb, dev) != 0){
-
-			/* Driver failed to transmit, re-enqueue
-			 * the packet and retry again later */
-			skb_queue_head(&sk->sk_write_queue,skb);
-			clear_bit(0,&wanpipe_tx_critical);
-			return;
-		}else{
-
-			/* Packet Sent successful. Check for more packets
-			 * if more packets, re-trigger the transmit routine
-			 * other wise exit
-			 */
-			atomic_dec(&wp->packet_sent);
-
-			if (skb_peek(&sk->sk_write_queue) == NULL) {
-				/* If there is nothing to send, kick
-				 * the poll routine, which will trigger
-				 * the application to send more data */
-				sk->sk_data_ready(sk, 0);
-				clear_bit(0, &wp->timer);
-			}else{
-				/* Reschedule as fast as possible */
-				wp->tx_timer.expires = jiffies + 1;
-				add_timer(&wp->tx_timer);
-			}
-		}
-	}
-	clear_bit(0,&wanpipe_tx_critical);
-}
-
-/*============================================================
- * execute_command
- *
- *	Execute x25api commands.  The atomic variable
- *      chan->command is used to indicate to the driver that
- *      command is pending for execution.  The acutal command
- *      structure is placed into a sock mbox structure
- *      (wp_sk(sk)->mbox).
- *
- *      The sock private structure, mbox is
- *      used as shared memory between sock and the driver.
- *      Driver uses the sock mbox to execute the command
- *      and return the result.
- *
- *      For all command except PLACE CALL, the function
- *      waits for the result.  PLACE CALL can be ether
- *      blocking or nonblocking. The user sets this option
- *      via ioctl call.
- *===========================================================*/
-
-
-static int execute_command(struct sock *sk,  unsigned char cmd, unsigned int flags)
-{
-	wanpipe_opt *wp = wp_sk(sk);
-	struct net_device *dev;
-	wanpipe_common_t *chan=NULL;
-	int err=0;
-	DECLARE_WAITQUEUE(wait, current);
-
-	dev = dev_get_by_index(sk->sk_bound_dev_if);
-	if (dev == NULL){
-		printk(KERN_INFO "wansock: Exec failed no dev %i\n",
-			sk->sk_bound_dev_if);
-		return -ENODEV;
-	}
-	dev_put(dev);
-
-	if ((chan=dev->priv) == NULL){
-		printk(KERN_INFO "wansock: Exec cmd failed no priv area\n");
-		return -ENODEV;
-	}
-
-	if (atomic_read(&chan->command)){
-		printk(KERN_INFO "wansock: ERROR: Command already running %x, %s\n",
-			atomic_read(&chan->command),dev->name);
-		return -EINVAL;
-	}
-
-	if (!wp->mbox) {
-		printk(KERN_INFO "wansock: In execute without MBOX\n");
-		return -EINVAL;
-	}
-
-	((mbox_cmd_t*)wp->mbox)->cmd.command = cmd;
-	((mbox_cmd_t*)wp->mbox)->cmd.lcn     = wp->lcn;
-	((mbox_cmd_t*)wp->mbox)->cmd.result  = 0x7F;
-
-
-	if (flags & O_NONBLOCK){
-		cmd |= 0x80;
-		atomic_set(&chan->command, cmd);
-	}else{
-		atomic_set(&chan->command, cmd);
-	}
-
-	add_wait_queue(sk->sk_sleep,&wait);
-	current->state = TASK_INTERRUPTIBLE;
-	for (;;){
-		if (((mbox_cmd_t*)wp->mbox)->cmd.result != 0x7F) {
-			err = 0;
-			break;
-		}
-		if (signal_pending(current)) {
-			err = -ERESTARTSYS;
-			break;
-		}
-		schedule();
-	}
-	current->state = TASK_RUNNING;
-	remove_wait_queue(sk->sk_sleep,&wait);
-
-	return err;
-}
-
-/*============================================================
- * wanpipe_destroy_timer
- *
- *	Used by wanpipe_release, to delay release of
- *      the socket.
- *===========================================================*/
-
-static void wanpipe_destroy_timer(unsigned long data)
-{
-	struct sock *sk=(struct sock *)data;
-	wanpipe_opt *wp = wp_sk(sk);
-
-	if ((!atomic_read(&sk->sk_wmem_alloc) &&
-	     !atomic_read(&sk->sk_rmem_alloc)) ||
-	    (++wp->force == 5)) {
-
-		if (atomic_read(&sk->sk_wmem_alloc) ||
-		    atomic_read(&sk->sk_rmem_alloc))
-			printk(KERN_INFO "wansock: Warning, Packet Discarded due to sock shutdown!\n");
-
-		kfree(wp);
-		wp_sk(sk) = NULL;
-
-		if (atomic_read(&sk->sk_refcnt) != 1) {
-			atomic_set(&sk->sk_refcnt, 1);
-			DBG_PRINTK(KERN_INFO "wansock: Error, wrong reference count: %i ! :delay.\n",
-					atomic_read(&sk->sk_refcnt));
-		}
-		sock_put(sk);
-		atomic_dec(&wanpipe_socks_nr);
-		return;
-	}
-
-	sk->sk_timer.expires = jiffies + 5 * HZ;
-	add_timer(&sk->sk_timer);
-	printk(KERN_INFO "wansock: packet sk destroy delayed\n");
-}
-
-/*============================================================
- * wanpipe_unlink_driver
- *
- * 	When the socket is released, this function is
- *      used to remove links that bind the sock and the
- *      driver together.
- *===========================================================*/
-static void wanpipe_unlink_driver (struct sock *sk)
-{
-	struct net_device *dev;
-	wanpipe_common_t *chan=NULL;
-
-	sock_reset_flag(sk, SOCK_ZAPPED);
-	sk->sk_state = WANSOCK_DISCONNECTED;
-	wp_sk(sk)->dev = NULL;
-
-	dev = dev_get_by_index(sk->sk_bound_dev_if);
-	if (!dev){
-		printk(KERN_INFO "wansock: No dev on release\n");
-		return;
-	}
-	dev_put(dev);
-
-	if ((chan = dev->priv) == NULL){
-		printk(KERN_INFO "wansock: No Priv Area on release\n");
-		return;
-	}
-
-	set_bit(0,&chan->common_critical);
-	chan->sk=NULL;
-	chan->func=NULL;
-	chan->mbox=NULL;
-	chan->tx_timer=NULL;
-	clear_bit(0,&chan->common_critical);
-	release_device(dev);
-
-	return;
-}
-
-/*============================================================
- * wanpipe_link_driver
- *
- * 	Upon successful bind(), sock is linked to a driver
- *      by binding in the wanpipe_rcv() bottom half handler
- *      to the driver function pointer, as well as sock and
- *      sock mailbox addresses.  This way driver can pass
- *      data up the socket.
- *===========================================================*/
-
-static void wanpipe_link_driver(struct net_device *dev, struct sock *sk)
-{
-	wanpipe_opt *wp = wp_sk(sk);
-	wanpipe_common_t *chan = dev->priv;
-	if (!chan)
-		return;
-	set_bit(0,&chan->common_critical);
-	chan->sk=sk;
-	chan->func=wanpipe_rcv;
-	chan->mbox = wp->mbox;
-	chan->tx_timer = &wp->tx_timer;
-	wp->dev = dev;
-	sock_set_flag(sk, SOCK_ZAPPED);
-	clear_bit(0,&chan->common_critical);
-}
-
-
-/*============================================================
- * release_device
- *
- *   	During sock release, clear a critical bit, which
- *      marks the device a being taken.
- *===========================================================*/
-
-
-static void release_device(struct net_device *dev)
-{
-	wanpipe_common_t *chan=dev->priv;
-	clear_bit(0,(void*)&chan->rw_bind);
-}
-
-/*============================================================
- * wanpipe_release
- *
- *	Close a PACKET socket. This is fairly simple. We
- *      immediately go to 'closed' state and remove our
- *      protocol entry in the device list.
- *===========================================================*/
-
-static int wanpipe_release(struct socket *sock)
-{
-	wanpipe_opt *wp;
-	struct sock *sk = sock->sk;
-
-	if (!sk)
-		return 0;
-
-	wp = wp_sk(sk);
-	check_write_queue(sk);
-
-	/* Kill the tx timer, if we don't kill it now, the timer
-	 * will run after we kill the sock.  Timer code will
-	 * try to access the sock which has been killed and cause
-	 * kernel panic */
-
-	del_timer(&wp->tx_timer);
-
-	/*
-	 *	Unhook packet receive handler.
-	 */
-
-	if (wp->num == htons(X25_PROT) &&
-	    sk->sk_state != WANSOCK_DISCONNECTED && sock_flag(sk, SOCK_ZAPPED)) {
-		struct net_device *dev = dev_get_by_index(sk->sk_bound_dev_if);
-		wanpipe_common_t *chan;
-		if (dev){
-			chan=dev->priv;
-			atomic_set(&chan->disconnect,1);
-			DBG_PRINTK(KERN_INFO "wansock: Sending Clear Indication %i\n",
-					sk->sk_state);
-			dev_put(dev);
-		}
-	}
-
-	set_bit(1,&wanpipe_tx_critical);
-	write_lock(&wanpipe_sklist_lock);
-	sk_del_node_init(sk);
-	write_unlock(&wanpipe_sklist_lock);
-	clear_bit(1,&wanpipe_tx_critical);
-
-
-
-	release_driver(sk);
-
-
-	/*
-	 *	Now the socket is dead. No more input will appear.
-	 */
-
-	sk->sk_state_change(sk);	/* It is useless. Just for sanity. */
-
-	sock->sk = NULL;
-	sk->sk_socket = NULL;
-	sock_set_flag(sk, SOCK_DEAD);
-
-	/* Purge queues */
-	skb_queue_purge(&sk->sk_receive_queue);
-	skb_queue_purge(&sk->sk_write_queue);
-	skb_queue_purge(&sk->sk_error_queue);
-
-	if (atomic_read(&sk->sk_rmem_alloc) ||
-	    atomic_read(&sk->sk_wmem_alloc)) {
-		del_timer(&sk->sk_timer);
-		printk(KERN_INFO "wansock: Killing in Timer R %i , W %i\n",
-			atomic_read(&sk->sk_rmem_alloc),
-			atomic_read(&sk->sk_wmem_alloc));
-		sk->sk_timer.data	= (unsigned long)sk;
-		sk->sk_timer.expires	= jiffies + HZ;
-		sk->sk_timer.function	= wanpipe_destroy_timer;
-		add_timer(&sk->sk_timer);
-		return 0;
-	}
-
-	kfree(wp);
-	wp_sk(sk) = NULL;
-
-	if (atomic_read(&sk->sk_refcnt) != 1) {
-		DBG_PRINTK(KERN_INFO "wansock: Error, wrong reference count: %i !:release.\n",
-					atomic_read(&sk->sk_refcnt));
-		atomic_set(&sk->sk_refcnt, 1);
-	}
-	sock_put(sk);
-	atomic_dec(&wanpipe_socks_nr);
-	return 0;
-}
-
-/*============================================================
- * check_write_queue
- *
- *  	During sock shutdown, if the sock state is
- *      WANSOCK_CONNECTED and there is transmit data
- *      pending. Wait until data is released
- *      before proceeding.
- *===========================================================*/
-
-static void check_write_queue(struct sock *sk)
-{
-
-	if (sk->sk_state != WANSOCK_CONNECTED)
-		return;
-
-	if (!atomic_read(&sk->sk_wmem_alloc))
-		return;
-
-	printk(KERN_INFO "wansock: MAJOR ERROR, Data lost on sock release !!!\n");
-
-}
-
-/*============================================================
- * release_driver
- *
- *	This function is called during sock shutdown, to
- *      release any resources and links that bind the sock
- *      to the driver.  It also changes the state of the
- *      sock to WANSOCK_DISCONNECTED
- *===========================================================*/
-
-static void release_driver(struct sock *sk)
-{
-	wanpipe_opt *wp;
-	struct sk_buff *skb=NULL;
-	struct sock *deadsk=NULL;
-
-	if (sk->sk_state == WANSOCK_LISTEN ||
-	    sk->sk_state == WANSOCK_BIND_LISTEN) {
-		while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
-			if ((deadsk = get_newsk_from_skb(skb))){
-				DBG_PRINTK (KERN_INFO "wansock: RELEASE: FOUND DEAD SOCK\n");
-				sock_set_flag(deadsk, SOCK_DEAD);
-				start_cleanup_timer(deadsk);
-			}
-			kfree_skb(skb);
-		}
-		if (sock_flag(sk, SOCK_ZAPPED))
-			wanpipe_unlink_card(sk);
-	}else{
-		if (sock_flag(sk, SOCK_ZAPPED))
-			wanpipe_unlink_driver(sk);
-	}
-	sk->sk_state	    = WANSOCK_DISCONNECTED;
-	sk->sk_bound_dev_if = 0;
-	sock_reset_flag(sk, SOCK_ZAPPED);
-	wp = wp_sk(sk);
-
-	if (wp) {
-		kfree(wp->mbox);
-		wp->mbox = NULL;
-	}
-}
-
-/*============================================================
- *  start_cleanup_timer
- *
- *  	If new incoming call's are pending but the socket
- *      is being released, start the timer which will
- *      envoke the kill routines for pending socks.
- *===========================================================*/
-
-
-static void start_cleanup_timer (struct sock *sk)
-{
-	del_timer(&sk->sk_timer);
-	sk->sk_timer.data	= (unsigned long)sk;
-	sk->sk_timer.expires	= jiffies + HZ;
-	sk->sk_timer.function	= wanpipe_kill_sock_timer;
-	add_timer(&sk->sk_timer);
-}
-
-
-/*============================================================
- *  wanpipe_kill_sock
- *
- *	This is a function which performs actual killing
- *      of the sock.  It releases socket resources,
- *      and unlinks the sock from the driver.
- *===========================================================*/
-
-static void wanpipe_kill_sock_timer (unsigned long data)
-{
-
-	struct sock *sk = (struct sock *)data;
-	struct sock **skp;
-
-	if (!sk)
-		return;
-
-	/* This function can be called from interrupt. We must use
-	 * appropriate locks */
-
-	if (test_bit(1,&wanpipe_tx_critical)){
-		sk->sk_timer.expires = jiffies + 10;
-		add_timer(&sk->sk_timer);
-		return;
-	}
-
-	write_lock(&wanpipe_sklist_lock);
-	sk_del_node_init(sk);
-	write_unlock(&wanpipe_sklist_lock);
-
-
-	if (wp_sk(sk)->num == htons(X25_PROT) &&
-	    sk->sk_state != WANSOCK_DISCONNECTED) {
-		struct net_device *dev = dev_get_by_index(sk->sk_bound_dev_if);
-		wanpipe_common_t *chan;
-		if (dev){
-			chan=dev->priv;
-			atomic_set(&chan->disconnect,1);
-			dev_put(dev);
-		}
-	}
-
-	release_driver(sk);
-
-	sk->sk_socket = NULL;
-
-	/* Purge queues */
-	skb_queue_purge(&sk->sk_receive_queue);
-	skb_queue_purge(&sk->sk_write_queue);
-	skb_queue_purge(&sk->sk_error_queue);
-
-	if (atomic_read(&sk->sk_rmem_alloc) ||
-	    atomic_read(&sk->sk_wmem_alloc)) {
-		del_timer(&sk->sk_timer);
-		printk(KERN_INFO "wansock: Killing SOCK in Timer\n");
-		sk->sk_timer.data	= (unsigned long)sk;
-		sk->sk_timer.expires	= jiffies + HZ;
-		sk->sk_timer.function	= wanpipe_destroy_timer;
-		add_timer(&sk->sk_timer);
-		return;
-	}
-
-	kfree(wp_sk(sk));
-	wp_sk(sk) = NULL;
-
-	if (atomic_read(&sk->sk_refcnt) != 1) {
-		atomic_set(&sk->sk_refcnt, 1);
-		DBG_PRINTK(KERN_INFO "wansock: Error, wrong reference count: %i ! :timer.\n",
-					atomic_read(&sk->sk_refcnt));
-	}
-	sock_put(sk);
-	atomic_dec(&wanpipe_socks_nr);
-	return;
-}
-
-static void wanpipe_kill_sock_accept (struct sock *sk)
-{
-
-	struct sock **skp;
-
-	if (!sk)
-		return;
-
-	/* This function can be called from interrupt. We must use
-	 * appropriate locks */
-
-	write_lock(&wanpipe_sklist_lock);
-	sk_del_node_init(sk);
-	write_unlock(&wanpipe_sklist_lock);
-
-	sk->sk_socket = NULL;
-
-
-	kfree(wp_sk(sk));
-	wp_sk(sk) = NULL;
-
-	if (atomic_read(&sk->sk_refcnt) != 1) {
-		atomic_set(&sk->sk_refcnt, 1);
-		DBG_PRINTK(KERN_INFO "wansock: Error, wrong reference count: %i ! :timer.\n",
-					atomic_read(&sk->sk_refcnt));
-	}
-	sock_put(sk);
-	atomic_dec(&wanpipe_socks_nr);
-	return;
-}
-
-
-static void wanpipe_kill_sock_irq (struct sock *sk)
-{
-
-	if (!sk)
-		return;
-
-	sk->sk_socket = NULL;
-
-	kfree(wp_sk(sk));
-	wp_sk(sk) = NULL;
-
-	if (atomic_read(&sk->sk_refcnt) != 1) {
-		atomic_set(&sk->sk_refcnt, 1);
-		DBG_PRINTK(KERN_INFO "wansock: Error, wrong reference count: %i !:listen.\n",
-					atomic_read(&sk->sk_refcnt));
-	}
-	sock_put(sk);
-	atomic_dec(&wanpipe_socks_nr);
-}
-
-
-/*============================================================
- *  wanpipe_do_bind
- *
- * 	Bottom half of the binding system call.
- *      Once the wanpipe_bind() function checks  the
- *      legality of the call, this function binds the
- *      sock to the driver.
- *===========================================================*/
-
-static int wanpipe_do_bind(struct sock *sk, struct net_device *dev,
-			   int protocol)
-{
-	wanpipe_opt *wp = wp_sk(sk);
-	wanpipe_common_t *chan=NULL;
-	int err=0;
-
-	if (sock_flag(sk, SOCK_ZAPPED)) {
-		err = -EALREADY;
-		goto bind_unlock_exit;
-	}
-
-	wp->num = protocol;
-
-	if (protocol == 0){
-		release_device(dev);
-		err = -EINVAL;
-		goto bind_unlock_exit;
-	}
-
-	if (dev) {
-		if (dev->flags&IFF_UP) {
-			chan=dev->priv;
-			sk->sk_state = chan->state;
-
-			if (wp->num == htons(X25_PROT) &&
-			    sk->sk_state != WANSOCK_DISCONNECTED &&
-			    sk->sk_state != WANSOCK_CONNECTING) {
-				DBG_PRINTK(KERN_INFO
-					"wansock: Binding to Device not DISCONNECTED %i\n",
-						sk->sk_state);
-				release_device(dev);
-				err = -EAGAIN;
-				goto bind_unlock_exit;
-			}
-
-			wanpipe_link_driver(dev,sk);
-			sk->sk_bound_dev_if = dev->ifindex;
-
-			/* X25 Specific option */
-			if (wp->num == htons(X25_PROT))
-				wp_sk(sk)->svc = chan->svc;
-
-		} else {
-			sk->sk_err = ENETDOWN;
-			sk->sk_error_report(sk);
-			release_device(dev);
-			err = -EINVAL;
-		}
-	} else {
-		err = -ENODEV;
-	}
-bind_unlock_exit:
-	/* FIXME where is this lock */
-
-	return err;
-}
-
-/*============================================================
- *  wanpipe_bind
- *
- *      BIND() System call, which is bound to the AF_WANPIPE
- *      operations structure.  It checks for correct wanpipe
- *      card name, and cross references interface names with
- *      the card names.  Thus, interface name must belong to
- *      the actual card.
- *===========================================================*/
-
-
-static int wanpipe_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
-{
-	struct wan_sockaddr_ll *sll = (struct wan_sockaddr_ll*)uaddr;
-	struct sock *sk=sock->sk;
-	wanpipe_opt *wp = wp_sk(sk);
-	struct net_device *dev = NULL;
-	sdla_t *card=NULL;
-	char name[15];
-
-	/*
-	 *	Check legality
-	 */
-
-	if (addr_len < sizeof(struct wan_sockaddr_ll)){
-		printk(KERN_INFO "wansock: Address length error\n");
-		return -EINVAL;
-	}
-	if (sll->sll_family != AF_WANPIPE){
-		printk(KERN_INFO "wansock: Illegal family name specified.\n");
-		return -EINVAL;
-	}
-
-	card = wanpipe_find_card (sll->sll_card);
-	if (!card){
-		printk(KERN_INFO "wansock: Wanpipe card not found: %s\n",sll->sll_card);
-		return -ENODEV;
-	}else{
-		wp_sk(sk)->card = (void *)card;
-	}
-
-	if (!strcmp(sll->sll_device,"svc_listen")){
-
-		/* Bind a sock to a card structure for listening
-		 */
-		int err=0;
-
-		/* This is x25 specific area if protocol doesn't
-		 * match, return error */
-		if (sll->sll_protocol != htons(X25_PROT))
-			return -EINVAL;
-
-		err= wanpipe_link_card (sk);
-		if (err < 0)
-			return err;
-
-		if (sll->sll_protocol)
-			wp->num = sll->sll_protocol;
-		sk->sk_state = WANSOCK_BIND_LISTEN;
-		return 0;
-
-	}else if (!strcmp(sll->sll_device,"svc_connect")){
-
-		/* This is x25 specific area if protocol doesn't
-		 * match, return error */
-		if (sll->sll_protocol != htons(X25_PROT))
-			return -EINVAL;
-
-		/* Find a free device
-		 */
-		dev = wanpipe_find_free_dev(card);
-		if (dev == NULL){
-			DBG_PRINTK(KERN_INFO "wansock: No free network devices for card %s\n",
-				card->devname);
-			return -EINVAL;
-		}
-	}else{
-		/* Bind a socket to a interface name
-		 * This is used by PVC mostly
-		 */
-		strlcpy(name,sll->sll_device,sizeof(name));
-		dev = dev_get_by_name(name);
-		if (dev == NULL){
-			printk(KERN_INFO "wansock: Failed to get Dev from name: %s,\n",
-					name);
-			return -ENODEV;
-		}
-
-		dev_put(dev);
-
-		if (check_dev(dev, card)){
-			printk(KERN_INFO "wansock: Device %s, doesn't belong to card %s\n",
-				dev->name, card->devname);
-			return -EINVAL;
-		}
-		if (get_atomic_device (dev))
-			return -EINVAL;
-	}
-
-	return wanpipe_do_bind(sk, dev, sll->sll_protocol ? : wp->num);
-}
-
-/*============================================================
- * get_atomic_device
- *
- *	Sets a bit atomically which indicates that
- *      the interface is taken. This avoids race conditions.
- *===========================================================*/
-
-
-static inline int get_atomic_device(struct net_device *dev)
-{
-	wanpipe_common_t *chan = dev->priv;
-	if (!test_and_set_bit(0,(void *)&chan->rw_bind)){
-		return 0;
-	}
-	return 1;
-}
-
-/*============================================================
- * check_dev
- *
- *  	Check that device name belongs to a particular card.
- *===========================================================*/
-
-static int check_dev(struct net_device *dev, sdla_t *card)
-{
-	struct net_device* tmp_dev;
-
-	for (tmp_dev = card->wandev.dev; tmp_dev;
-	     tmp_dev = *((struct net_device **)tmp_dev->priv)) {
-		if (tmp_dev->ifindex == dev->ifindex){
-			return 0;
-		}
-	}
-	return 1;
-}
-
-/*============================================================
- *  wanpipe_find_free_dev
- *
- *	Find a free network interface. If found set atomic
- *      bit indicating that the interface is taken.
- *      X25API Specific.
- *===========================================================*/
-
-struct net_device *wanpipe_find_free_dev(sdla_t *card)
-{
-	struct net_device* dev;
-	volatile wanpipe_common_t *chan;
-
-	if (test_and_set_bit(0,&find_free_critical)){
-		printk(KERN_INFO "CRITICAL in Find Free\n");
-	}
-
-	for (dev = card->wandev.dev; dev;
-	     dev = *((struct net_device **)dev->priv)) {
-		chan = dev->priv;
-		if (!chan)
-			continue;
-		if (chan->usedby == API && chan->svc){
-			if (!get_atomic_device (dev)){
-				if (chan->state != WANSOCK_DISCONNECTED){
-					release_device(dev);
-				}else{
-					clear_bit(0,&find_free_critical);
-					return dev;
-				}
-			}
-		}
-	}
-	clear_bit(0,&find_free_critical);
-	return NULL;
-}
-
-/*============================================================
- *  wanpipe_create
- *
- * 	SOCKET() System call.  It allocates a sock structure
- *      and adds the socket to the wanpipe_sk_list.
- *      Crates AF_WANPIPE socket.
- *===========================================================*/
-
-static int wanpipe_create(struct socket *sock, int protocol)
-{
-	struct sock *sk;
-
-	//FIXME: This checks for root user, SECURITY ?
-	//if (!capable(CAP_NET_RAW))
-	//	return -EPERM;
-
-	if (sock->type != SOCK_DGRAM && sock->type != SOCK_RAW)
-		return -ESOCKTNOSUPPORT;
-
-	sock->state = SS_UNCONNECTED;
-
-	if ((sk = wanpipe_alloc_socket()) == NULL)
-		return -ENOBUFS;
-
-	sk->sk_reuse = 1;
-	sock->ops = &wanpipe_ops;
-	sock_init_data(sock,sk);
-
-	sock_reset_flag(sk, SOCK_ZAPPED);
-	sk->sk_family	    = PF_WANPIPE;
-	wp_sk(sk)->num	    = protocol;
-	sk->sk_state	    = WANSOCK_DISCONNECTED;
-	sk->sk_ack_backlog  = 0;
-	sk->sk_bound_dev_if = 0;
-
-	atomic_inc(&wanpipe_socks_nr);
-
-	/* We must disable interrupts because the ISR
-	 * can also change the list */
-	set_bit(1,&wanpipe_tx_critical);
-	write_lock(&wanpipe_sklist_lock);
-	sk_add_node(sk, &wanpipe_sklist);
-	write_unlock(&wanpipe_sklist_lock);
-	clear_bit(1,&wanpipe_tx_critical);
-
-	return(0);
-}
-
-
-/*============================================================
- *  wanpipe_recvmsg
- *
- *	Pull a packet from our receive queue and hand it
- *      to the user. If necessary we block.
- *===========================================================*/
-
-static int wanpipe_recvmsg(struct kiocb *iocb, struct socket *sock,
-			   struct msghdr *msg, int len, int flags)
-{
-	struct sock *sk = sock->sk;
-	struct sk_buff *skb;
-	int copied, err=-ENOBUFS;
-
-
-	/*
-	 *	If the address length field is there to be filled in, we fill
-	 *	it in now.
-	 */
-
-	msg->msg_namelen = sizeof(struct wan_sockaddr_ll);
-
-	/*
-	 *	Call the generic datagram receiver. This handles all sorts
-	 *	of horrible races and re-entrancy so we can forget about it
-	 *	in the protocol layers.
-	 *
-	 *	Now it will return ENETDOWN, if device have just gone down,
-	 *	but then it will block.
-	 */
-
-	if (flags & MSG_OOB){
-		skb = skb_dequeue(&sk->sk_error_queue);
-	}else{
-		skb=skb_recv_datagram(sk,flags,1,&err);
-	}
-	/*
-	 *	An error occurred so return it. Because skb_recv_datagram()
-	 *	handles the blocking we don't see and worry about blocking
-	 *	retries.
-	 */
-
-	if(skb==NULL)
-		goto out;
-
-	/*
-	 *	You lose any data beyond the buffer you gave. If it worries a
-	 *	user program they can ask the device for its MTU anyway.
-	 */
-
-	copied = skb->len;
-	if (copied > len)
-	{
-		copied=len;
-		msg->msg_flags|=MSG_TRUNC;
-	}
-
-	wanpipe_wakeup_driver(sk);
-
-	/* We can't use skb_copy_datagram here */
-	err = memcpy_toiovec(msg->msg_iov, skb->data, copied);
-	if (err)
-		goto out_free;
-
-	sock_recv_timestamp(msg, sk, skb);
-
-	if (msg->msg_name)
-		memcpy(msg->msg_name, skb->cb, msg->msg_namelen);
-
-	/*
-	 *	Free or return the buffer as appropriate. Again this
-	 *	hides all the races and re-entrancy issues from us.
-	 */
-	err = (flags&MSG_TRUNC) ? skb->len : copied;
-
-out_free:
-	skb_free_datagram(sk, skb);
-out:
-	return err;
-}
-
-
-/*============================================================
- *  wanpipe_wakeup_driver
- *
- * 	If socket receive buffer is full and driver cannot
- *      pass data up the sock, it sets a packet_block flag.
- *      This function check that flag and if sock receive
- *      queue has room it kicks the driver BH handler.
- *
- * 	This way, driver doesn't have to poll the sock
- *      receive queue.
- *===========================================================*/
-
-static void wanpipe_wakeup_driver(struct sock *sk)
-{
-	struct net_device *dev = NULL;
-	wanpipe_common_t *chan=NULL;
-
-	dev = dev_get_by_index(sk->sk_bound_dev_if);
-	if (!dev)
-		return;
-
-	dev_put(dev);
-
-	if ((chan = dev->priv) == NULL)
-		return;
-
-	if (atomic_read(&chan->receive_block)){
-		if (atomic_read(&sk->sk_rmem_alloc) <
-		    ((unsigned)sk->sk_rcvbuf * 0.9)) {
-			printk(KERN_INFO "wansock: Queuing task for wanpipe\n");
-			atomic_set(&chan->receive_block,0);
-			wanpipe_queue_tq(&chan->wanpipe_task);
-			wanpipe_mark_bh();
-		}
-	}
-}
-
-/*============================================================
- *  wanpipe_getname
- *
- * 	I don't know what to do with this yet.
- *      User can use this function to get sock address
- *      information. Not very useful for Sangoma's purposes.
- *===========================================================*/
-
-
-static int wanpipe_getname(struct socket *sock, struct sockaddr *uaddr,
-			  int *uaddr_len, int peer)
-{
-	struct net_device *dev;
-	struct sock *sk = sock->sk;
-	struct wan_sockaddr_ll *sll = (struct wan_sockaddr_ll*)uaddr;
-
-	sll->sll_family = AF_WANPIPE;
-	sll->sll_ifindex = sk->sk_bound_dev_if;
-	sll->sll_protocol = wp_sk(sk)->num;
-	dev = dev_get_by_index(sk->sk_bound_dev_if);
-	if (dev) {
-		sll->sll_hatype = dev->type;
-		sll->sll_halen = dev->addr_len;
-		memcpy(sll->sll_addr, dev->dev_addr, dev->addr_len);
-	} else {
-		sll->sll_hatype = 0;	/* Bad: we have no ARPHRD_UNSPEC */
-		sll->sll_halen = 0;
-	}
-	*uaddr_len = sizeof(*sll);
-
-	dev_put(dev);
-
-	return 0;
-}
-
-/*============================================================
- *  wanpipe_notifier
- *
- *	If driver turns off network interface, this function
- *      will be envoked. Currently I treate it as a
- *      call disconnect. More thought should go into this
- *      function.
- *
- * FIXME: More thought should go into this function.
- *
- *===========================================================*/
-
-static int wanpipe_notifier(struct notifier_block *this, unsigned long msg, void *data)
-{
-	struct sock *sk;
-	hlist_node *node;
-	struct net_device *dev = (struct net_device *)data;
-
-	sk_for_each(sk, node, &wanpipe_sklist) {
-		struct wanpipe_opt *po = wp_sk(sk);
-
-		if (!po)
-			continue;
-		if (dev == NULL)
-			continue;
-
-		switch (msg) {
-		case NETDEV_DOWN:
-		case NETDEV_UNREGISTER:
-			if (dev->ifindex == sk->sk_bound_dev_if) {
-				printk(KERN_INFO "wansock: Device down %s\n",dev->name);
-				if (sock_flag(sk, SOCK_ZAPPED)) {
-					wanpipe_unlink_driver(sk);
-					sk->sk_err = ENETDOWN;
-					sk->sk_error_report(sk);
-				}
-
-				if (msg == NETDEV_UNREGISTER) {
-					printk(KERN_INFO "wansock: Unregistering Device: %s\n",
-							  dev->name);
-					wanpipe_unlink_driver(sk);
-					sk->sk_bound_dev_if = 0;
-				}
-			}
-			break;
-		case NETDEV_UP:
-			if (dev->ifindex == sk->sk_bound_dev_if &&
-			    po->num && !sock_flag(sk, SOCK_ZAPPED)) {
-				printk(KERN_INFO "wansock: Registering Device: %s\n",
-						dev->name);
-				wanpipe_link_driver(dev,sk);
-			}
-			break;
-		}
-	}
-	return NOTIFY_DONE;
-}
-
-/*============================================================
- *  wanpipe_ioctl
- *
- * 	Execute a user commands, and set socket options.
- *
- * FIXME: More thought should go into this function.
- *
- *===========================================================*/
-
-static int wanpipe_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
-{
-	struct sock *sk = sock->sk;
-	int err;
-
-	switch(cmd)
-	{
-		case SIOCGSTAMP:
-			return sock_get_timestamp(sk, (struct timeval __user *)arg);
-
-		case SIOC_WANPIPE_CHECK_TX:
-
-			return atomic_read(&sk->sk_wmem_alloc);
-
-		case SIOC_WANPIPE_SOCK_STATE:
-
-			if (sk->sk_state == WANSOCK_CONNECTED)
-				return 0;
-
-			return 1;
-
-
-		case SIOC_WANPIPE_GET_CALL_DATA:
-
-			return get_ioctl_cmd (sk,(void*)arg);
-
-		case SIOC_WANPIPE_SET_CALL_DATA:
-
-			return set_ioctl_cmd (sk,(void*)arg);
-
-		case SIOC_WANPIPE_ACCEPT_CALL:
-		case SIOC_WANPIPE_CLEAR_CALL:
-		case SIOC_WANPIPE_RESET_CALL:
-
-			if ((err=set_ioctl_cmd(sk,(void*)arg)) < 0)
-				return err;
-
-			err=wanpipe_exec_cmd(sk,cmd,0);
-			get_ioctl_cmd(sk,(void*)arg);
-			return err;
-
-		case SIOC_WANPIPE_DEBUG:
-
-			return wanpipe_debug(sk,(void*)arg);
-
-		case SIOC_WANPIPE_SET_NONBLOCK:
-
-			if (sk->sk_state != WANSOCK_DISCONNECTED)
-				return -EINVAL;
-
-			sock->file->f_flags |= O_NONBLOCK;
-			return 0;
-
-#ifdef CONFIG_INET
-		case SIOCADDRT:
-		case SIOCDELRT:
-		case SIOCDARP:
-		case SIOCGARP:
-		case SIOCSARP:
-		case SIOCDRARP:
-		case SIOCGRARP:
-		case SIOCSRARP:
-		case SIOCGIFADDR:
-		case SIOCSIFADDR:
-		case SIOCGIFBRDADDR:
-		case SIOCSIFBRDADDR:
-		case SIOCGIFNETMASK:
-		case SIOCSIFNETMASK:
-		case SIOCGIFDSTADDR:
-		case SIOCSIFDSTADDR:
-		case SIOCSIFFLAGS:
-			return inet_dgram_ops.ioctl(sock, cmd, arg);
-#endif
-
-		default:
-			return -ENOIOCTLCMD;
-	}
-	/*NOTREACHED*/
-}
-
-/*============================================================
- *  wanpipe_debug
- *
- *	This function will pass up information about all
- *      active sockets.
- *
- * FIXME: More thought should go into this function.
- *
- *===========================================================*/
-
-static int wanpipe_debug (struct sock *origsk, void *arg)
-{
-	struct sock *sk;
-	struct hlist_node *node;
-	struct net_device *dev = NULL;
-	wanpipe_common_t *chan=NULL;
-	int cnt=0, err=0;
-	wan_debug_t *dbg_data = (wan_debug_t *)arg;
-
-	sk_for_each(sk, node, &wanpipe_sklist) {
-		wanpipe_opt *wp = wp_sk(sk);
-
-		if (sk == origsk){
-			continue;
-		}
-
-		if ((err=put_user(1, &dbg_data->debug[cnt].free)))
-			return err;
-		if ((err = put_user(sk->sk_state,
-				    &dbg_data->debug[cnt].state_sk)))
-			return err;
-		if ((err = put_user(sk->sk_rcvbuf,
-				    &dbg_data->debug[cnt].rcvbuf)))
-			return err;
-		if ((err = put_user(atomic_read(&sk->sk_rmem_alloc),
-				    &dbg_data->debug[cnt].rmem)))
-			return err;
-		if ((err = put_user(atomic_read(&sk->sk_wmem_alloc),
-				    &dbg_data->debug[cnt].wmem)))
-			return err;
-		if ((err = put_user(sk->sk_sndbuf,
-				    &dbg_data->debug[cnt].sndbuf)))
-			return err;
-		if ((err=put_user(sk_count, &dbg_data->debug[cnt].sk_count)))
-			return err;
-		if ((err=put_user(wp->poll_cnt, &dbg_data->debug[cnt].poll_cnt)))
-			return err;
-		if ((err = put_user(sk->sk_bound_dev_if,
-				    &dbg_data->debug[cnt].bound)))
-			return err;
-
-		if (sk->sk_bound_dev_if) {
-			dev = dev_get_by_index(sk->sk_bound_dev_if);
-			if (!dev)
-				continue;
-
-			chan=dev->priv;
-			dev_put(dev);
-
-			if ((err=put_user(chan->state, &dbg_data->debug[cnt].d_state)))
-				return err;
-			if ((err=put_user(chan->svc, &dbg_data->debug[cnt].svc)))
-				return err;
-
-			if ((err=put_user(atomic_read(&chan->command),
-						&dbg_data->debug[cnt].command)))
-				return err;
-
-
-			if (wp){
-				sdla_t *card = (sdla_t*)wp->card;
-
-				if (card){
-					if ((err=put_user(atomic_read(&card->u.x.command_busy),
-								&dbg_data->debug[cnt].cmd_busy)))
-						return err;
-				}
-
-				if ((err=put_user(wp->lcn,
-						  &dbg_data->debug[cnt].lcn)))
-					return err;
-
-				if (wp->mbox) {
-					if ((err=put_user(1, &dbg_data->debug[cnt].mbox)))
-						return err;
-				}
-			}
-
-			if ((err=put_user(atomic_read(&chan->receive_block),
-								&dbg_data->debug[cnt].rblock)))
-				return err;
-
-			if (copy_to_user(dbg_data->debug[cnt].name, dev->name, strlen(dev->name)))
-				return -EFAULT;
-		}
-
-		if (++cnt == MAX_NUM_DEBUG)
-			break;
-	}
-	return 0;
-}
-
-/*============================================================
- *  get_ioctl_cmd
- *
- *	Pass up the contents of socket MBOX to the user.
- *===========================================================*/
-
-static int get_ioctl_cmd (struct sock *sk, void *arg)
-{
-	x25api_t *usr_data = (x25api_t *)arg;
-	mbox_cmd_t *mbox_ptr;
-	int err;
-
-	if (usr_data == NULL)
-		return -EINVAL;
-
-	if (!wp_sk(sk)->mbox) {
-		return -EINVAL;
-	}
-
-	mbox_ptr = (mbox_cmd_t *)wp_sk(sk)->mbox;
-
-	if ((err=put_user(mbox_ptr->cmd.qdm, &usr_data->hdr.qdm)))
-		return err;
-	if ((err=put_user(mbox_ptr->cmd.cause, &usr_data->hdr.cause)))
-		return err;
-	if ((err=put_user(mbox_ptr->cmd.diagn, &usr_data->hdr.diagn)))
-		return err;
-	if ((err=put_user(mbox_ptr->cmd.length, &usr_data->hdr.length)))
-		return err;
-	if ((err=put_user(mbox_ptr->cmd.result, &usr_data->hdr.result)))
-		return err;
-	if ((err=put_user(mbox_ptr->cmd.lcn, &usr_data->hdr.lcn)))
-		return err;
-
-	if (mbox_ptr->cmd.length > 0){
-		if (mbox_ptr->cmd.length > X25_MAX_DATA)
-			return -EINVAL;
-
-		if (copy_to_user(usr_data->data, mbox_ptr->data, mbox_ptr->cmd.length)){
-			printk(KERN_INFO "wansock: Copy failed !!!\n");
-			return -EFAULT;
-		}
-	}
-	return 0;
-}
-
-/*============================================================
- *  set_ioctl_cmd
- *
- *	Before command can be execute, socket MBOX must
- *      be created, and initialized with user data.
- *===========================================================*/
-
-static int set_ioctl_cmd (struct sock *sk, void *arg)
-{
-	x25api_t *usr_data = (x25api_t *)arg;
-	mbox_cmd_t *mbox_ptr;
-	int err;
-
-	if (!wp_sk(sk)->mbox) {
-		void *mbox_ptr;
-		struct net_device *dev = dev_get_by_index(sk->sk_bound_dev_if);
-		if (!dev)
-			return -ENODEV;
-
-		dev_put(dev);
-
-		if ((mbox_ptr = kzalloc(sizeof(mbox_cmd_t), GFP_ATOMIC)) == NULL)
-			return -ENOMEM;
-
-		wp_sk(sk)->mbox = mbox_ptr;
-
-		wanpipe_link_driver(dev,sk);
-	}
-
-	mbox_ptr = (mbox_cmd_t*)wp_sk(sk)->mbox;
-	memset(mbox_ptr, 0, sizeof(mbox_cmd_t));
-
-	if (usr_data == NULL){
-		return 0;
-	}
-	if ((err=get_user(mbox_ptr->cmd.qdm, &usr_data->hdr.qdm)))
-		return err;
-	if ((err=get_user(mbox_ptr->cmd.cause, &usr_data->hdr.cause)))
-		return err;
-	if ((err=get_user(mbox_ptr->cmd.diagn, &usr_data->hdr.diagn)))
-		return err;
-	if ((err=get_user(mbox_ptr->cmd.length, &usr_data->hdr.length)))
-		return err;
-	if ((err=get_user(mbox_ptr->cmd.result, &usr_data->hdr.result)))
-		return err;
-
-	if (mbox_ptr->cmd.length > 0){
-		if (mbox_ptr->cmd.length > X25_MAX_DATA)
-			return -EINVAL;
-
-		if (copy_from_user(mbox_ptr->data, usr_data->data, mbox_ptr->cmd.length)){
-			printk(KERN_INFO "Copy failed\n");
-			return -EFAULT;
-		}
-	}
-	return 0;
-}
-
-
-/*======================================================================
- * wanpipe_poll
- *
- *	Datagram poll: Again totally generic. This also handles
- *	sequenced packet sockets providing the socket receive queue
- *	is only ever holding data ready to receive.
- *
- *	Note: when you _don't_ use this routine for this protocol,
- *	and you use a different write policy from sock_writeable()
- *	then please supply your own write_space callback.
- *=====================================================================*/
-
-unsigned int wanpipe_poll(struct file * file, struct socket *sock, poll_table *wait)
-{
-	struct sock *sk = sock->sk;
-	unsigned int mask;
-
-	++wp_sk(sk)->poll_cnt;
-
-	poll_wait(file, sk->sk_sleep, wait);
-	mask = 0;
-
-	/* exceptional events? */
-	if (sk->sk_err || !skb_queue_empty(&sk->sk_error_queue)) {
-		mask |= POLLPRI;
-		return mask;
-	}
-	if (sk->sk_shutdown & RCV_SHUTDOWN)
-		mask |= POLLHUP;
-
-	/* readable? */
-	if (!skb_queue_empty(&sk->sk_receive_queue)) {
-		mask |= POLLIN | POLLRDNORM;
-	}
-
-	/* connection hasn't started yet */
-	if (sk->sk_state == WANSOCK_CONNECTING) {
-		return mask;
-	}
-
-	if (sk->sk_state == WANSOCK_DISCONNECTED) {
-		mask = POLLPRI;
-		return mask;
-	}
-
-	/* This check blocks the user process if there is
-	 * a packet already queued in the socket write queue.
-	 * This option is only for X25API protocol, for other
-	 * protocol like chdlc enable streaming mode,
-	 * where multiple packets can be pending in the socket
-	 * transmit queue */
-
-	if (wp_sk(sk)->num == htons(X25_PROT)) {
-		if (atomic_read(&wp_sk(sk)->packet_sent))
-			return mask;
-	}
-
-	/* writable? */
-	if (sock_writeable(sk)){
-		mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
-	}else{
-		set_bit(SOCK_ASYNC_NOSPACE, &sk->sk_socket->flags);
-	}
-
-	return mask;
-}
-
-/*======================================================================
- * wanpipe_listen
- *
- *	X25API Specific function. Set a socket into LISTENING  MODE.
- *=====================================================================*/
-
-
-static int wanpipe_listen(struct socket *sock, int backlog)
-{
-	struct sock *sk = sock->sk;
-
-	/* This is x25 specific area if protocol doesn't
-	 * match, return error */
-	if (wp_sk(sk)->num != htons(X25_PROT))
-		return -EINVAL;
-
-	if (sk->sk_state == WANSOCK_BIND_LISTEN) {
-
-		sk->sk_max_ack_backlog = backlog;
-		sk->sk_state           = WANSOCK_LISTEN;
-		return 0;
-	}else{
-		printk(KERN_INFO "wansock: Listening sock was not binded\n");
-	}
-
-	return -EINVAL;
-}
-
-/*======================================================================
- * wanpipe_link_card
- *
- *	Connects the listening socket to the driver
- *=====================================================================*/
-
-static int wanpipe_link_card (struct sock *sk)
-{
-	sdla_t *card = (sdla_t*)wp_sk(sk)->card;
-
-	if (!card)
-		return -ENOMEM;
-
-	if ((card->sk != NULL) || (card->func != NULL)){
-		printk(KERN_INFO "wansock: Listening queue is already established\n");
-		return -EINVAL;
-	}
-
-	card->sk=sk;
-	card->func=wanpipe_listen_rcv;
-	sock_set_flag(sk, SOCK_ZAPPED);
-
-	return 0;
-}
-
-/*======================================================================
- * wanpipe_listen
- *
- *	X25API Specific function. Disconnect listening socket from
- *      the driver.
- *=====================================================================*/
-
-static void wanpipe_unlink_card (struct sock *sk)
-{
-	sdla_t *card = (sdla_t*)wp_sk(sk)->card;
-
-	if (card){
-		card->sk=NULL;
-		card->func=NULL;
-	}
-}
-
-/*======================================================================
- * wanpipe_exec_cmd
- *
- *	Ioctl function calls this function to execute user command.
- *      Connect() sytem call also calls this function to execute
- *      place call.  This function blocks until command is executed.
- *=====================================================================*/
-
-static int wanpipe_exec_cmd(struct sock *sk, int cmd, unsigned int flags)
-{
-	int err = -EINVAL;
-	wanpipe_opt *wp = wp_sk(sk);
-	mbox_cmd_t *mbox_ptr = (mbox_cmd_t*)wp->mbox;
-
-	if (!mbox_ptr){
-		printk(KERN_INFO "NO MBOX PTR !!!!!\n");
-		return -EINVAL;
-	}
-
-	/* This is x25 specific area if protocol doesn't
-	 * match, return error */
-	if (wp->num != htons(X25_PROT))
-		return -EINVAL;
-
-
-	switch (cmd){
-
-		case SIOC_WANPIPE_ACCEPT_CALL:
-
-			if (sk->sk_state != WANSOCK_CONNECTING) {
-				err = -EHOSTDOWN;
-				break;
-			}
-
-			err = execute_command(sk,X25_ACCEPT_CALL,0);
-			if (err < 0)
-				break;
-
-			/* Update. Mar6 2000.
-			 * Do not set the sock lcn number here, since
-			 * it is done in wanpipe_listen_rcv().
-			 */
-			if (sk->sk_state == WANSOCK_CONNECTED) {
-				wp->lcn = ((mbox_cmd_t*)wp->mbox)->cmd.lcn;
-				DBG_PRINTK(KERN_INFO "\nwansock: Accept OK %i\n",
-					wp->lcn);
-				err = 0;
-
-			}else{
-				DBG_PRINTK (KERN_INFO "\nwansock: Accept Failed %i\n",
-					wp->lcn);
-				wp->lcn = 0;
-				err = -ECONNREFUSED;
-			}
-			break;
-
-		case SIOC_WANPIPE_CLEAR_CALL:
-
-			if (sk->sk_state == WANSOCK_DISCONNECTED) {
-				err = -EINVAL;
-				break;
-			}
-
-
-			/* Check if data buffers are pending for transmission,
-			 * if so, check whether user wants to wait until data
-			 * is transmitted, or clear a call and drop packets */
-
-			if (atomic_read(&sk->sk_wmem_alloc) ||
-			    check_driver_busy(sk)) {
-				mbox_cmd_t *mbox = wp->mbox;
-				if (mbox->cmd.qdm & 0x80){
-					mbox->cmd.result = 0x35;
-					err = -EAGAIN;
-					break;
-				}
-			}
-
-			sk->sk_state = WANSOCK_DISCONNECTING;
-
-			err = execute_command(sk,X25_CLEAR_CALL,0);
-			if (err < 0)
-				break;
-
-			err = -ECONNREFUSED;
-			if (sk->sk_state == WANSOCK_DISCONNECTED) {
-				DBG_PRINTK(KERN_INFO "\nwansock: CLEAR OK %i\n",
-					   wp->lcn);
-				wp->lcn = 0;
-				err = 0;
-			}
-			break;
-
-		case SIOC_WANPIPE_RESET_CALL:
-
-			if (sk->sk_state != WANSOCK_CONNECTED) {
-				err = -EINVAL;
-				break;
-			}
-
-
-			/* Check if data buffers are pending for transmission,
-			 * if so, check whether user wants to wait until data
-			 * is transmitted, or reset a call and drop packets */
-
-			if (atomic_read(&sk->sk_wmem_alloc) ||
-			    check_driver_busy(sk)) {
-				mbox_cmd_t *mbox = wp->mbox;
-				if (mbox->cmd.qdm & 0x80){
-					mbox->cmd.result = 0x35;
-					err = -EAGAIN;
-					break;
-				}
-			}
-
-
-			err = execute_command(sk, X25_RESET,0);
-			if (err < 0)
-				break;
-
-			err = mbox_ptr->cmd.result;
-			break;
-
-
-		case X25_PLACE_CALL:
-
-			err=execute_command(sk,X25_PLACE_CALL,flags);
-			if (err < 0)
-				break;
-
-			if (sk->sk_state == WANSOCK_CONNECTED) {
-
-				wp->lcn = ((mbox_cmd_t*)wp->mbox)->cmd.lcn;
-
-				DBG_PRINTK(KERN_INFO "\nwansock: PLACE CALL OK %i\n",
-					wp->lcn);
-				err = 0;
-
-			} else if (sk->sk_state == WANSOCK_CONNECTING &&
-				   (flags & O_NONBLOCK)) {
-				wp->lcn = ((mbox_cmd_t*)wp->mbox)->cmd.lcn;
-				DBG_PRINTK(KERN_INFO "\nwansock: Place Call OK: Waiting %i\n",
-					wp->lcn);
-
-				err = 0;
-
-			}else{
-				DBG_PRINTK(KERN_INFO "\nwansock: Place call Failed\n");
-				err = -ECONNREFUSED;
-			}
-
-			break;
-
-		default:
-			return -EINVAL;
-	}
-
-	return err;
-}
-
-static int check_driver_busy (struct sock *sk)
-{
-	struct net_device *dev = dev_get_by_index(sk->sk_bound_dev_if);
-	wanpipe_common_t *chan;
-
-	if (!dev)
-		return 0;
-
-	dev_put(dev);
-
-	if ((chan=dev->priv) == NULL)
-		return 0;
-
-	return atomic_read(&chan->driver_busy);
-}
-
-
-/*======================================================================
- * wanpipe_accept
- *
- *	ACCEPT() System call.	X25API Specific function.
- *	For each incoming call, create a new socket and
- *      return it to the user.
- *=====================================================================*/
-
-static int wanpipe_accept(struct socket *sock, struct socket *newsock, int flags)
-{
-	struct sock *sk;
-	struct sock *newsk;
-	struct sk_buff *skb;
-	DECLARE_WAITQUEUE(wait, current);
-	int err=0;
-
-	if (newsock->sk != NULL){
-		wanpipe_kill_sock_accept(newsock->sk);
-		newsock->sk=NULL;
-	}
-
-	if ((sk = sock->sk) == NULL)
-		return -EINVAL;
-
-	if (sk->sk_type != SOCK_RAW)
-		return -EOPNOTSUPP;
-
-	if (sk->sk_state != WANSOCK_LISTEN)
-		return -EINVAL;
-
-	if (wp_sk(sk)->num != htons(X25_PROT))
-		return -EINVAL;
-
-	add_wait_queue(sk->sk_sleep,&wait);
-	current->state = TASK_INTERRUPTIBLE;
-	for (;;){
-		skb = skb_dequeue(&sk->sk_receive_queue);
-		if (skb){
-			err=0;
-			break;
-		}
-		if (signal_pending(current)) {
-			err = -ERESTARTSYS;
-			break;
-		}
-		schedule();
-	}
-	current->state = TASK_RUNNING;
-	remove_wait_queue(sk->sk_sleep,&wait);
-
-	if (err != 0)
-		return err;
-
-	newsk = get_newsk_from_skb(skb);
-	if (!newsk){
-		return -EINVAL;
-	}
-
-	set_bit(1,&wanpipe_tx_critical);
-	write_lock(&wanpipe_sklist_lock);
-	sk_add_node(newsk, &wanpipe_sklist);
-	write_unlock(&wanpipe_sklist_lock);
-	clear_bit(1,&wanpipe_tx_critical);
-
-	newsk->sk_socket = newsock;
-	newsk->sk_sleep = &newsock->wait;
-
-	/* Now attach up the new socket */
-	sk->sk_ack_backlog--;
-	newsock->sk = newsk;
-
-	kfree_skb(skb);
-
-	DBG_PRINTK(KERN_INFO "\nwansock: ACCEPT Got LCN %i\n",
-		   wp_sk(newsk)->lcn);
-	return 0;
-}
-
-/*======================================================================
- *  get_newsk_from_skb
- *
- *	Accept() uses this function to get the address of the new
- *      socket structure.
- *=====================================================================*/
-
-struct sock * get_newsk_from_skb (struct sk_buff *skb)
-{
-	struct net_device *dev = skb->dev;
-	wanpipe_common_t *chan;
-
-	if (!dev){
-		return NULL;
-	}
-
-	if ((chan = dev->priv) == NULL){
-		return NULL;
-	}
-
-	if (!chan->sk){
-		return NULL;
-	}
-	return (struct sock *)chan->sk;
-}
-
-/*======================================================================
- *  wanpipe_connect
- *
- *  	CONNECT() System Call. X25API specific function
- * 	Check the state of the sock, and execute PLACE_CALL command.
- *      Connect can ether block or return without waiting for connection,
- *      if specified by user.
- *=====================================================================*/
-
-static int wanpipe_connect(struct socket *sock, struct sockaddr *uaddr, int addr_len, int flags)
-{
-	struct sock *sk = sock->sk;
-	struct wan_sockaddr_ll *addr = (struct wan_sockaddr_ll*)uaddr;
-	struct net_device *dev;
-	int err;
-
-	if (wp_sk(sk)->num != htons(X25_PROT))
-		return -EINVAL;
-
-	if (sk->sk_state == WANSOCK_CONNECTED)
-		return -EISCONN;	/* No reconnect on a seqpacket socket */
-
-	if (sk->sk_state != WAN_DISCONNECTED) {
-		printk(KERN_INFO "wansock: Trying to connect on channel NON DISCONNECT\n");
-		return -ECONNREFUSED;
-	}
-
-	sk->sk_state = WANSOCK_DISCONNECTED;
-	sock->state  = SS_UNCONNECTED;
-
-	if (addr_len != sizeof(struct wan_sockaddr_ll))
-		return -EINVAL;
-
-	if (addr->sll_family != AF_WANPIPE)
-		return -EINVAL;
-
-	if ((dev = dev_get_by_index(sk->sk_bound_dev_if)) == NULL)
-		return -ENETUNREACH;
-
-	dev_put(dev);
-
-	if (!sock_flag(sk, SOCK_ZAPPED)) /* Must bind first - autobinding does not work */
-		return -EINVAL;
-
-	sock->state   = SS_CONNECTING;
-	sk->sk_state  = WANSOCK_CONNECTING;
-
-	if (!wp_sk(sk)->mbox) {
-		if (wp_sk (sk)->svc)
-			return -EINVAL;
-		else {
-			int err;
-			if ((err=set_ioctl_cmd(sk,NULL)) < 0)
-				return err;
-		}
-	}
-
-	if ((err=wanpipe_exec_cmd(sk, X25_PLACE_CALL,flags)) != 0){
-		sock->state = SS_UNCONNECTED;
-		sk->sk_state = WANSOCK_CONNECTED;
-		return err;
-	}
-
-	if (sk->sk_state != WANSOCK_CONNECTED && (flags & O_NONBLOCK)) {
-		return 0;
-	}
-
-	if (sk->sk_state != WANSOCK_CONNECTED) {
-		sock->state = SS_UNCONNECTED;
-		return -ECONNREFUSED;
-	}
-
-	sock->state = SS_CONNECTED;
-	return 0;
-}
-
-const struct proto_ops wanpipe_ops = {
-	.family = 	PF_WANPIPE,
-	.owner =	THIS_MODULE,
-	.release = 	wanpipe_release,
-	.bind = 	wanpipe_bind,
-	.connect = 	wanpipe_connect,
-	.socketpair = 	sock_no_socketpair,
-	.accept = 	wanpipe_accept,
-	.getname = 	wanpipe_getname,
-	.poll = 	wanpipe_poll,
-	.ioctl = 	wanpipe_ioctl,
-	.listen = 	wanpipe_listen,
-	.shutdown = 	sock_no_shutdown,
-	.setsockopt = 	sock_no_setsockopt,
-	.getsockopt = 	sock_no_getsockopt,
-	.sendmsg = 	wanpipe_sendmsg,
-	.recvmsg = 	wanpipe_recvmsg
-};
-
-static struct net_proto_family wanpipe_family_ops = {
-	.family = PF_WANPIPE,
-	.create = wanpipe_create,
-	.owner	= THIS_MODULE,
-};
-
-struct notifier_block wanpipe_netdev_notifier = {
-	.notifier_call = wanpipe_notifier,
-};
-
-
-#ifdef MODULE
-void cleanup_module(void)
-{
-	printk(KERN_INFO "wansock: Cleaning up \n");
-	unregister_netdevice_notifier(&wanpipe_netdev_notifier);
-	sock_unregister(PF_WANPIPE);
-	proto_unregister(&wanpipe_proto);
-}
-
-int init_module(void)
-{
-	int rc;
-
-	printk(KERN_INFO "wansock: Registering Socket \n");
-
-	rc = proto_register(&wanpipe_proto, 0);
-	if (rc != 0)
-		goto out;
-
-	sock_register(&wanpipe_family_ops);
-	register_netdevice_notifier(&wanpipe_netdev_notifier);
-out:
-	return rc;
-}
-#endif
-MODULE_LICENSE("GPL");
-MODULE_ALIAS_NETPROTO(PF_WANPIPE);

-- 
========================================================================
Robert P. J. Day
Linux Consulting, Training and Annoying Kernel Pedantry
Waterloo, Ontario, CANADA

http://fsdev.net/wiki/index.php?title=Main_Page
========================================================================
-
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