Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 3429 insertions, 0 deletions

diff --git a/drivers/net/wan/sdla_ppp.c b/drivers/net/wan/sdla_ppp.c
new file mode 100644
index 00000000000..1761cb68ab4
--- /dev/null
+++ b/drivers/net/wan/sdla_ppp.c
@@ -0,0 +1,3429 @@
+/*****************************************************************************
+* sdla_ppp.c	WANPIPE(tm) Multiprotocol WAN Link Driver. PPP module.
+*
+* Author: 	Nenad Corbic <ncorbic@sangoma.com>
+*
+* Copyright:	(c) 1995-2001 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.
+* ============================================================================
+* Feb 28, 2001  Nenad Corbic	o Updated if_tx_timeout() routine for 
+* 				  2.4.X kernels.
+* Nov 29, 2000  Nenad Corbic	o Added the 2.4.x kernel support:
+* 				  get_ip_address() function has moved
+* 				  into the ppp_poll() routine. It cannot
+* 				  be called from an interrupt.
+* Nov 07, 2000  Nenad Corbic	o Added security features for UDP debugging:
+*                                 Deny all and specify allowed requests.
+* May 02, 2000  Nenad Corbic	o Added the dynamic interface shutdown
+*                                 option. When the link goes down, the
+*                                 network interface IFF_UP flag is reset.
+* Mar 06, 2000  Nenad Corbic	o Bug Fix: corrupted mbox recovery.
+* Feb 25, 2000  Nenad Corbic    o Fixed the FT1 UDP debugger problem.
+* Feb 09, 2000  Nenad Coribc    o Shutdown bug fix. update() was called
+*                                 with NULL dev pointer: no check.
+* Jan 24, 2000  Nenad Corbic    o Disabled use of CMD complete inter.
+* Dev 15, 1999  Nenad Corbic    o Fixed up header files for 2.0.X kernels
+* Oct 25, 1999  Nenad Corbic    o Support for 2.0.X kernels
+*                                 Moved dynamic route processing into 
+*                                 a polling routine.
+* Oct 07, 1999  Nenad Corbic    o Support for S514 PCI card.  
+*               Gideon Hack     o UPD and Updates executed using timer interrupt
+* Sep 10, 1999  Nenad Corbic    o Fixed up the /proc statistics
+* Jul 20, 1999  Nenad Corbic    o Remove the polling routines and use 
+*                                 interrupts instead.
+* Sep 17, 1998	Jaspreet Singh	o Updates for 2.2.X Kernels.
+* Aug 13, 1998	Jaspreet Singh	o Improved Line Tracing.
+* Jun 22, 1998	David Fong	o Added remote IP address assignment
+* Mar 15, 1998	Alan Cox	o 2.1.8x basic port.
+* Apr 16, 1998	Jaspreet Singh	o using htons() for the IPX protocol.
+* Dec 09, 1997	Jaspreet Singh	o Added PAP and CHAP.
+*				o Implemented new routines like 
+*				  ppp_set_inbnd_auth(), ppp_set_outbnd_auth(),
+*				  tokenize() and strstrip().
+* Nov 27, 1997	Jaspreet Singh	o Added protection against enabling of irqs 
+*				  while they have been disabled.
+* Nov 24, 1997  Jaspreet Singh  o Fixed another RACE condition caused by
+*                                 disabling and enabling of irqs.
+*                               o Added new counters for stats on disable/enable
+*                                 IRQs.
+* Nov 10, 1997	Jaspreet Singh	o Initialized 'skb->mac.raw' to 'skb->data'
+*				  before every netif_rx().
+*				o Free up the device structure in del_if().
+* Nov 07, 1997	Jaspreet Singh	o Changed the delay to zero for Line tracing
+*				  command.
+* Oct 20, 1997 	Jaspreet Singh	o Added hooks in for Router UP time.
+* Oct 16, 1997	Jaspreet Singh  o The critical flag is used to maintain flow
+*				  control by avoiding RACE conditions.  The 
+*				  cli() and restore_flags() are taken out.
+*				  A new structure, "ppp_private_area", is added 
+*				  to provide Driver Statistics.   
+* Jul 21, 1997 	Jaspreet Singh	o Protected calls to sdla_peek() by adding 
+*				  save_flags(), cli() and restore_flags().
+* Jul 07, 1997	Jaspreet Singh  o Added configurable TTL for UDP packets
+*				o Added ability to discard mulitcast and
+*				  broacast source addressed packets.
+* Jun 27, 1997 	Jaspreet Singh	o Added FT1 monitor capabilities
+*				  New case (0x25) statement in if_send routine.
+*				  Added a global variable rCount to keep track
+*				  of FT1 status enabled on the board.
+* May 22, 1997	Jaspreet Singh	o Added change in the PPP_SET_CONFIG command for
+*				508 card to reflect changes in the new 
+*				ppp508.sfm for supporting:continous transmission
+*				of Configure-Request packets without receiving a
+*				reply 				
+*				OR-ed 0x300 to conf_flags 
+*			        o Changed connect_tmout from 900 to 0
+* May 21, 1997	Jaspreet Singh  o Fixed UDP Management for multiple boards
+* Apr 25, 1997  Farhan Thawar    o added UDP Management stuff
+* Mar 11, 1997  Farhan Thawar   Version 3.1.1
+*                                o fixed (+1) bug in rx_intr()
+*                                o changed if_send() to return 0 if
+*                                  wandev.critical() is true
+*                                o free socket buffer in if_send() if
+*                                  returning 0 
+* Jan 15, 1997	Gene Kozin	Version 3.1.0
+*				 o implemented exec() entry point
+* Jan 06, 1997	Gene Kozin	Initial version.
+*****************************************************************************/
+
+#include <linux/module.h>
+#include <linux/kernel.h>	/* printk(), and other useful stuff */
+#include <linux/stddef.h>	/* offsetof(), etc. */
+#include <linux/errno.h>	/* return codes */
+#include <linux/string.h>	/* inline memset(), etc. */
+#include <linux/slab.h>	/* kmalloc(), kfree() */
+#include <linux/wanrouter.h>	/* WAN router definitions */
+#include <linux/wanpipe.h>	/* WANPIPE common user API definitions */
+#include <linux/if_arp.h>	/* ARPHRD_* defines */
+#include <asm/byteorder.h>	/* htons(), etc. */
+#include <linux/in.h>		/* sockaddr_in */
+
+
+#include <asm/uaccess.h>
+#include <linux/inetdevice.h>
+#include <linux/netdevice.h>
+
+#include <linux/if.h>
+#include <linux/sdla_ppp.h>		/* PPP firmware API definitions */
+#include <linux/sdlasfm.h>		/* S514 Type Definition */
+/****** Defines & Macros ****************************************************/
+
+#define	PPP_DFLT_MTU	1500		/* default MTU */
+#define	PPP_MAX_MTU	4000		/* maximum MTU */
+#define PPP_HDR_LEN	1
+
+#define MAX_IP_ERRORS 100 
+
+#define	CONNECT_TIMEOUT	(90*HZ)		/* link connection timeout */
+#define	HOLD_DOWN_TIME	(5*HZ)		/* link hold down time : Changed from 30 to 5 */
+
+/* For handle_IPXWAN() */
+#define CVHexToAscii(b) (((unsigned char)(b) > (unsigned char)9) ? ((unsigned char)'A' + ((unsigned char)(b) - (unsigned char)10)) : ((unsigned char)'0' + (unsigned char)(b)))
+
+/* Macro for enabling/disabling debugging comments */
+//#define NEX_DEBUG
+#ifdef NEX_DEBUG
+#define NEX_PRINTK(format, a...) printk(format, ## a)
+#else
+#define NEX_PRINTK(format, a...)
+#endif /* NEX_DEBUG */ 
+
+#define DCD(a)   ( a & 0x08 ? "HIGH" : "LOW" )
+#define CTS(a)   ( a & 0x20 ? "HIGH" : "LOW" )
+#define LCP(a)   ( a == 0x09 ? "OPEN" : "CLOSED" )
+#define IP(a)    ( a == 0x09 ? "ENABLED" : "DISABLED" )
+
+#define TMR_INT_ENABLED_UPDATE  	0x01
+#define TMR_INT_ENABLED_PPP_EVENT	0x02
+#define TMR_INT_ENABLED_UDP		0x04
+#define TMR_INT_ENABLED_CONFIG		0x20
+
+/* Set Configuraton Command Definitions */
+#define PERCENT_TX_BUFF			60
+#define TIME_BETWEEN_CONF_REQ  		30
+#define TIME_BETWEEN_PAP_CHAP_REQ	30
+#define WAIT_PAP_CHAP_WITHOUT_REPLY     300
+#define WAIT_AFTER_DCD_CTS_LOW          5
+#define TIME_DCD_CTS_LOW_AFTER_LNK_DOWN 10
+#define WAIT_DCD_HIGH_AFTER_ENABLE_COMM 900
+#define MAX_CONF_REQ_WITHOUT_REPLY      10
+#define MAX_TERM_REQ_WITHOUT_REPLY      2
+#define NUM_CONF_NAK_WITHOUT_REPLY      5
+#define NUM_AUTH_REQ_WITHOUT_REPLY      10
+
+#define END_OFFSET 0x1F0
+
+
+/******Data Structures*****************************************************/
+
+/* This structure is placed in the private data area of the device structure.
+ * The card structure used to occupy the private area but now the following 
+ * structure will incorporate the card structure along with PPP specific data
+ */
+  
+typedef struct ppp_private_area
+{
+	struct net_device *slave;
+	sdla_t* card;	
+	unsigned long router_start_time;	/*router start time in sec */
+	unsigned long tick_counter;		/*used for 5 second counter*/
+	unsigned mc;				/*multicast support on or off*/
+	unsigned char enable_IPX;
+	unsigned long network_number;
+	unsigned char pap;
+	unsigned char chap;
+	unsigned char sysname[31];		/* system name for in-bnd auth*/
+	unsigned char userid[511];		/* list of user ids */
+	unsigned char passwd[511];		/* list of passwords */
+	unsigned protocol;			/* SKB Protocol */
+	u32 ip_local;				/* Local IP Address */
+	u32 ip_remote;				/* remote IP Address */
+
+	u32 ip_local_tmp;
+	u32 ip_remote_tmp;
+	
+	unsigned char timer_int_enabled;	/* Who enabled the timer inter*/
+	unsigned char update_comms_stats;	/* Used by update function */
+	unsigned long curr_trace_addr;		/* Trace information */
+	unsigned long start_trace_addr;
+	unsigned long end_trace_addr;
+
+	unsigned char interface_down;		/* Brind down interface when channel 
+                                                   goes down */
+	unsigned long config_wait_timeout;	/* After if_open() if in dynamic if mode,
+						   wait a few seconds before configuring */
+	
+	unsigned short udp_pkt_lgth;
+	char  udp_pkt_src;
+      	char  udp_pkt_data[MAX_LGTH_UDP_MGNT_PKT];
+
+	/* PPP specific statistics */
+
+	if_send_stat_t if_send_stat;
+	rx_intr_stat_t rx_intr_stat;
+	pipe_mgmt_stat_t pipe_mgmt_stat;
+
+	unsigned long router_up_time; 
+
+	/* Polling work queue entry. Each interface
+         * has its own work queue entry, which is used
+         * to defer events from the interrupt */
+	struct work_struct poll_work;
+	struct timer_list poll_delay_timer;
+
+	u8 gateway;
+	u8 config_ppp;
+	u8 ip_error;
+	
+}ppp_private_area_t;
+
+/* variable for keeping track of enabling/disabling FT1 monitor status */
+static int rCount = 0;
+
+extern void disable_irq(unsigned int);
+extern void enable_irq(unsigned int);
+
+/****** Function Prototypes *************************************************/
+
+/* WAN link driver entry points. These are called by the WAN router module. */
+static int update(struct wan_device *wandev);
+static int new_if(struct wan_device *wandev, struct net_device *dev,
+		  wanif_conf_t *conf);
+static int del_if(struct wan_device *wandev, struct net_device *dev);
+
+/* WANPIPE-specific entry points */
+static int wpp_exec (struct sdla *card, void *u_cmd, void *u_data);
+
+/* Network device interface */
+static int if_init(struct net_device *dev);
+static int if_open(struct net_device *dev);
+static int if_close(struct net_device *dev);
+static int if_header(struct sk_buff *skb, struct net_device *dev,
+		     unsigned short type, 
+		     void *daddr, void *saddr, unsigned len);
+
+static void if_tx_timeout(struct net_device *dev);
+
+static int if_rebuild_hdr(struct sk_buff *skb);
+static struct net_device_stats *if_stats(struct net_device *dev);
+static int if_send(struct sk_buff *skb, struct net_device *dev);
+
+
+/* PPP firmware interface functions */
+static int ppp_read_version(sdla_t *card, char *str);
+static int ppp_set_outbnd_auth(sdla_t *card, ppp_private_area_t *ppp_priv_area);
+static int ppp_set_inbnd_auth(sdla_t *card, ppp_private_area_t *ppp_priv_area);
+static int ppp_configure(sdla_t *card, void *data);
+static int ppp_set_intr_mode(sdla_t *card, unsigned char mode);
+static int ppp_comm_enable(sdla_t *card);
+static int ppp_comm_disable(sdla_t *card);
+static int ppp_comm_disable_shutdown(sdla_t *card);
+static int ppp_get_err_stats(sdla_t *card);
+static int ppp_send(sdla_t *card, void *data, unsigned len, unsigned proto);
+static int ppp_error(sdla_t *card, int err, ppp_mbox_t *mb);
+
+static void wpp_isr(sdla_t *card);
+static void rx_intr(sdla_t *card);
+static void event_intr(sdla_t *card);
+static void timer_intr(sdla_t *card);
+
+/* Background polling routines */
+static void process_route(sdla_t *card);
+static void retrigger_comm(sdla_t *card);
+
+/* Miscellaneous functions */
+static int read_info( sdla_t *card );
+static int read_connection_info (sdla_t *card);
+static void remove_route( sdla_t *card );
+static int config508(struct net_device *dev, sdla_t *card);
+static void show_disc_cause(sdla_t * card, unsigned cause);
+static int reply_udp( unsigned char *data, unsigned int mbox_len );
+static void process_udp_mgmt_pkt(sdla_t *card, struct net_device *dev, 
+				ppp_private_area_t *ppp_priv_area);
+static void init_ppp_tx_rx_buff( sdla_t *card );
+static int intr_test( sdla_t *card );
+static int udp_pkt_type( struct sk_buff *skb , sdla_t *card);
+static void init_ppp_priv_struct( ppp_private_area_t *ppp_priv_area);
+static void init_global_statistics( sdla_t *card );
+static int tokenize(char *str, char **tokens);
+static char* strstrip(char *str, char *s);
+static int chk_bcast_mcast_addr(sdla_t* card, struct net_device* dev,
+				struct sk_buff *skb);
+
+static int config_ppp (sdla_t *);
+static void ppp_poll(struct net_device *dev);
+static void trigger_ppp_poll(struct net_device *dev);
+static void ppp_poll_delay (unsigned long dev_ptr);
+
+
+static int Read_connection_info;
+static int Intr_test_counter;
+static unsigned short available_buffer_space;
+
+
+/* IPX functions */
+static void switch_net_numbers(unsigned char *sendpacket, unsigned long network_number, 
+			       unsigned char incoming);
+static int handle_IPXWAN(unsigned char *sendpacket, char *devname, unsigned char enable_PX, 
+			 unsigned long network_number, unsigned short proto);
+
+/* Lock Functions */
+static void s508_lock (sdla_t *card, unsigned long *smp_flags);
+static void s508_unlock (sdla_t *card, unsigned long *smp_flags);
+
+static int store_udp_mgmt_pkt(char udp_pkt_src, sdla_t* card,
+                                struct sk_buff *skb, struct net_device* dev,
+                                ppp_private_area_t* ppp_priv_area );
+static unsigned short calc_checksum (char *data, int len);
+static void disable_comm (sdla_t *card);
+static int detect_and_fix_tx_bug (sdla_t *card);
+
+/****** Public Functions ****************************************************/
+
+/*============================================================================
+ * PPP protocol initialization routine.
+ *
+ * This routine is called by the main WANPIPE module during setup.  At this
+ * point adapter is completely initialized and firmware is running.
+ *  o read firmware version (to make sure it's alive)
+ *  o configure adapter
+ *  o initialize protocol-specific fields of the adapter data space.
+ *
+ * Return:	0	o.k.
+ *		< 0	failure.
+ */
+int wpp_init(sdla_t *card, wandev_conf_t *conf)
+{
+	ppp_flags_t *flags;
+	union
+	{
+		char str[80];
+	} u;
+
+	/* Verify configuration ID */
+	if (conf->config_id != WANCONFIG_PPP) {
+		
+		printk(KERN_INFO "%s: invalid configuration ID %u!\n",
+			card->devname, conf->config_id);
+		return -EINVAL;
+
+	}
+
+	/* Initialize miscellaneous pointers to structures on the adapter */
+	switch (card->hw.type) {
+
+		case SDLA_S508:
+			card->mbox =(void*)(card->hw.dpmbase + PPP508_MB_OFFS);
+			card->flags=(void*)(card->hw.dpmbase + PPP508_FLG_OFFS);
+			break;
+		
+		case SDLA_S514:
+			card->mbox =(void*)(card->hw.dpmbase + PPP514_MB_OFFS);
+			card->flags=(void*)(card->hw.dpmbase + PPP514_FLG_OFFS);
+			break;
+
+		default:
+			return -EINVAL;
+
+	}
+	flags = card->flags;
+
+	/* Read firmware version.  Note that when adapter initializes, it
+	 * clears the mailbox, so it may appear that the first command was
+	 * executed successfully when in fact it was merely erased. To work
+	 * around this, we execute the first command twice.
+	 */
+	if (ppp_read_version(card, NULL) || ppp_read_version(card, u.str))
+		return -EIO;
+	
+	printk(KERN_INFO "%s: running PPP firmware v%s\n",card->devname, u.str); 
+	/* Adjust configuration and set defaults */
+	card->wandev.mtu = (conf->mtu) ?
+		min_t(unsigned int, conf->mtu, PPP_MAX_MTU) : PPP_DFLT_MTU;
+
+	card->wandev.bps	= conf->bps;
+	card->wandev.interface	= conf->interface;
+	card->wandev.clocking	= conf->clocking;
+	card->wandev.station	= conf->station;
+	card->isr		= &wpp_isr;
+	card->poll		= NULL; 
+	card->exec		= &wpp_exec;
+	card->wandev.update	= &update;
+	card->wandev.new_if	= &new_if;
+	card->wandev.del_if	= &del_if;
+        card->wandev.udp_port   = conf->udp_port;
+	card->wandev.ttl	= conf->ttl;
+	card->wandev.state      = WAN_DISCONNECTED;
+	card->disable_comm	= &disable_comm;
+	card->irq_dis_if_send_count = 0;
+        card->irq_dis_poll_count = 0;
+	card->u.p.authenticator = conf->u.ppp.authenticator;
+	card->u.p.ip_mode 	= conf->u.ppp.ip_mode ?
+				 conf->u.ppp.ip_mode : WANOPT_PPP_STATIC;
+        card->TracingEnabled    = 0;
+	Read_connection_info    = 1;
+
+	/* initialize global statistics */
+	init_global_statistics( card );
+
+
+
+	if (!card->configured){
+		int err;
+
+		Intr_test_counter = 0;
+		err = intr_test(card);
+
+		if(err || (Intr_test_counter < MAX_INTR_TEST_COUNTER)) {
+			printk("%s: Interrupt Test Failed, Counter: %i\n", 
+				card->devname, Intr_test_counter);
+			printk( "%s: Please choose another interrupt\n",card->devname);
+			return -EIO;
+		}
+		
+		printk(KERN_INFO "%s: Interrupt Test Passed, Counter: %i\n", 
+			card->devname, Intr_test_counter);
+		card->configured = 1;
+	}
+
+	ppp_set_intr_mode(card, PPP_INTR_TIMER); 
+
+	/* Turn off the transmit and timer interrupt */
+	flags->imask &= ~PPP_INTR_TIMER;
+
+	printk(KERN_INFO "\n");
+
+	return 0;
+}
+
+/******* WAN Device Driver Entry Points *************************************/
+
+/*============================================================================
+ * Update device status & statistics.
+ */
+static int update(struct wan_device *wandev)
+{
+	sdla_t* card = wandev->private;
+ 	struct net_device* dev;
+        volatile ppp_private_area_t *ppp_priv_area;
+	ppp_flags_t *flags = card->flags;
+	unsigned long timeout;
+
+	/* sanity checks */
+	if ((wandev == NULL) || (wandev->private == NULL))
+		return -EFAULT;
+	
+	if (wandev->state == WAN_UNCONFIGURED)
+		return -ENODEV;
+	
+	/* Shutdown bug fix. This function can be
+         * called with NULL dev pointer during
+         * shutdown 
+	 */
+	if ((dev=card->wandev.dev) == NULL){
+		return -ENODEV;
+	}
+
+	if ((ppp_priv_area=dev->priv) == NULL){
+		return -ENODEV;
+	}
+	
+	ppp_priv_area->update_comms_stats = 2;
+	ppp_priv_area->timer_int_enabled |= TMR_INT_ENABLED_UPDATE;
+	flags->imask |= PPP_INTR_TIMER;	
+	
+	/* wait a maximum of 1 second for the statistics to be updated */ 
+        timeout = jiffies;
+        for(;;) {
+		if(ppp_priv_area->update_comms_stats == 0){
+			break;
+		}
+                if ((jiffies - timeout) > (1 * HZ)){
+    			ppp_priv_area->update_comms_stats = 0;
+ 			ppp_priv_area->timer_int_enabled &=
+				~TMR_INT_ENABLED_UPDATE; 
+ 			return -EAGAIN;
+		}
+        }
+
+	return 0;
+}
+
+/*============================================================================
+ * Create new logical channel.
+ * This routine is called by the router when ROUTER_IFNEW IOCTL is being
+ * handled.
+ * o parse media- and hardware-specific configuration
+ * o make sure that a new channel can be created
+ * o allocate resources, if necessary
+ * o prepare network device structure for registaration.
+ *
+ * Return:	0	o.k.
+ *		< 0	failure (channel will not be created)
+ */
+static int new_if(struct wan_device *wandev, struct net_device *dev,
+		  wanif_conf_t *conf)
+{
+	sdla_t *card = wandev->private;
+	ppp_private_area_t *ppp_priv_area;
+
+	if (wandev->ndev)
+		return -EEXIST;
+	
+
+	printk(KERN_INFO "%s: Configuring Interface: %s\n",
+			card->devname, conf->name);
+
+	if ((conf->name[0] == '\0') || (strlen(conf->name) > WAN_IFNAME_SZ)) {
+
+		printk(KERN_INFO "%s: Invalid interface name!\n",
+			card->devname);
+		return -EINVAL;
+
+	}
+
+	/* allocate and initialize private data */
+	ppp_priv_area = kmalloc(sizeof(ppp_private_area_t), GFP_KERNEL);
+	
+	if( ppp_priv_area == NULL )
+		return	-ENOMEM;
+	
+	memset(ppp_priv_area, 0, sizeof(ppp_private_area_t));
+	
+	ppp_priv_area->card = card; 
+	
+	/* initialize data */
+	strcpy(card->u.p.if_name, conf->name);
+
+	/* initialize data in ppp_private_area structure */
+	
+	init_ppp_priv_struct( ppp_priv_area );
+
+	ppp_priv_area->mc = conf->mc;
+	ppp_priv_area->pap = conf->pap;
+	ppp_priv_area->chap = conf->chap;
+
+	/* Option to bring down the interface when 
+         * the link goes down */
+	if (conf->if_down){
+		set_bit(DYN_OPT_ON,&ppp_priv_area->interface_down);
+		printk("%s: Dynamic interface configuration enabled\n",
+			card->devname);
+	} 
+
+	/* If no user ids are specified */
+	if(!strlen(conf->userid) && (ppp_priv_area->pap||ppp_priv_area->chap)){
+		kfree(ppp_priv_area);
+		return -EINVAL;
+	}
+
+	/* If no passwords are specified */
+	if(!strlen(conf->passwd) && (ppp_priv_area->pap||ppp_priv_area->chap)){
+		kfree(ppp_priv_area);
+		return -EINVAL;
+	}
+
+	if(strlen(conf->sysname) > 31){
+		kfree(ppp_priv_area);
+		return -EINVAL;
+	}
+
+	/* If no system name is specified */
+	if(!strlen(conf->sysname) && (card->u.p.authenticator)){
+		kfree(ppp_priv_area);
+		return -EINVAL;
+	}
+
+	/* copy the data into the ppp private structure */
+	memcpy(ppp_priv_area->userid, conf->userid, strlen(conf->userid));
+	memcpy(ppp_priv_area->passwd, conf->passwd, strlen(conf->passwd));
+	memcpy(ppp_priv_area->sysname, conf->sysname, strlen(conf->sysname));
+
+	
+	ppp_priv_area->enable_IPX = conf->enable_IPX;
+	if (conf->network_number){
+		ppp_priv_area->network_number = conf->network_number;
+	}else{
+		ppp_priv_area->network_number = 0xDEADBEEF;
+	}
+
+	/* Tells us that if this interface is a
+         * gateway or not */
+	if ((ppp_priv_area->gateway = conf->gateway) == WANOPT_YES){
+		printk(KERN_INFO "%s: Interface %s is set as a gateway.\n",
+			card->devname,card->u.p.if_name);
+	}
+
+	/* prepare network device data space for registration */
+ 	strcpy(dev->name,card->u.p.if_name);
+	
+	dev->init = &if_init;
+	dev->priv = ppp_priv_area;
+	dev->mtu = min_t(unsigned int, dev->mtu, card->wandev.mtu);
+
+	/* Initialize the polling work routine */
+	INIT_WORK(&ppp_priv_area->poll_work, (void*)(void*)ppp_poll, dev);
+
+	/* Initialize the polling delay timer */
+	init_timer(&ppp_priv_area->poll_delay_timer);
+	ppp_priv_area->poll_delay_timer.data = (unsigned long)dev;
+	ppp_priv_area->poll_delay_timer.function = ppp_poll_delay;
+	
+	
+	/* Since we start with dummy IP addresses we can say
+	 * that route exists */
+	printk(KERN_INFO "\n");
+
+	return 0;
+}
+
+/*============================================================================
+ * Delete logical channel.
+ */
+static int del_if(struct wan_device *wandev, struct net_device *dev)
+{
+	return 0;
+}
+
+static void disable_comm (sdla_t *card)
+{
+	ppp_comm_disable_shutdown(card);
+	return;
+}
+
+/****** WANPIPE-specific entry points ***************************************/
+
+/*============================================================================
+ * Execute adapter interface command.
+ */
+
+//FIXME: Why do we need this ????
+static int wpp_exec(struct sdla *card, void *u_cmd, void *u_data)
+{
+	ppp_mbox_t *mbox = card->mbox;
+	int len;
+
+	if (copy_from_user((void*)&mbox->cmd, u_cmd, sizeof(ppp_cmd_t)))
+		return -EFAULT;
+
+	len = mbox->cmd.length;
+
+	if (len) {
+
+		if( copy_from_user((void*)&mbox->data, u_data, len))
+			return -EFAULT;
+
+	}
+
+	/* execute command */
+	if (!sdla_exec(mbox))
+		return -EIO;
+
+	/* return result */
+	if( copy_to_user(u_cmd, (void*)&mbox->cmd, sizeof(ppp_cmd_t)))
+		return -EFAULT;
+	len = mbox->cmd.length;
+
+	if (len && u_data && copy_to_user(u_data, (void*)&mbox->data, len))
+		return -EFAULT;
+
+	return 0;
+}
+
+/****** Network Device Interface ********************************************/
+
+/*============================================================================
+ * Initialize Linux network interface.
+ *
+ * This routine is called only once for each interface, during Linux network
+ * interface registration.  Returning anything but zero will fail interface
+ * registration.
+ */
+static int if_init(struct net_device *dev)
+{
+	ppp_private_area_t *ppp_priv_area = dev->priv;
+	sdla_t *card = ppp_priv_area->card;
+	struct wan_device *wandev = &card->wandev;
+
+	/* Initialize device driver entry points */
+	dev->open		= &if_open;
+	dev->stop		= &if_close;
+	dev->hard_header	= &if_header;
+	dev->rebuild_header	= &if_rebuild_hdr;
+	dev->hard_start_xmit	= &if_send;
+	dev->get_stats		= &if_stats;
+	dev->tx_timeout		= &if_tx_timeout;
+	dev->watchdog_timeo	= TX_TIMEOUT;
+
+	/* Initialize media-specific parameters */
+	dev->type		= ARPHRD_PPP;	/* ARP h/w type */
+	dev->flags		|= IFF_POINTOPOINT;
+	dev->flags		|= IFF_NOARP;
+
+	/* Enable Mulitcasting if specified by user*/
+	if (ppp_priv_area->mc == WANOPT_YES){
+		dev->flags	|= IFF_MULTICAST;
+	}
+
+	dev->mtu		= wandev->mtu;
+	dev->hard_header_len	= PPP_HDR_LEN;	/* media header length */
+
+	/* Initialize hardware parameters (just for reference) */
+	dev->irq		= wandev->irq;
+	dev->dma		= wandev->dma;
+	dev->base_addr		= wandev->ioport;
+	dev->mem_start		= wandev->maddr;
+	dev->mem_end		= wandev->maddr + wandev->msize - 1;
+
+        /* Set transmit buffer queue length */
+        dev->tx_queue_len = 100;
+	SET_MODULE_OWNER(dev);
+   
+	return 0;
+}
+
+/*============================================================================
+ * Open network interface.
+ * o enable communications and interrupts.
+ * o prevent module from unloading by incrementing use count
+ *
+ * Return 0 if O.k. or errno.
+ */
+static int if_open(struct net_device *dev)
+{
+	ppp_private_area_t *ppp_priv_area = dev->priv;
+	sdla_t *card = ppp_priv_area->card;
+	struct timeval tv;
+	//unsigned long smp_flags;
+
+	if (netif_running(dev))
+		return -EBUSY;
+
+	wanpipe_open(card);
+
+	netif_start_queue(dev);
+	
+	do_gettimeofday( &tv );
+	ppp_priv_area->router_start_time = tv.tv_sec;
+
+	/* We cannot configure the card here because we don't
+	 * have access to the interface IP addresses.
+         * Once the interface initilization is complete, we will be
+         * able to access the IP addresses.  Therefore,
+         * configure the ppp link in the poll routine */
+	set_bit(0,&ppp_priv_area->config_ppp);
+	ppp_priv_area->config_wait_timeout=jiffies;
+
+	/* Start the PPP configuration after 1sec delay.
+	 * This will give the interface initilization time
+	 * to finish its configuration */
+	mod_timer(&ppp_priv_area->poll_delay_timer, jiffies + HZ);
+	return 0;
+}
+
+/*============================================================================
+ * Close network interface.
+ * o if this is the last open, then disable communications and interrupts.
+ * o reset flags.
+ */
+static int if_close(struct net_device *dev)
+{
+	ppp_private_area_t *ppp_priv_area = dev->priv;
+	sdla_t *card = ppp_priv_area->card;
+
+	netif_stop_queue(dev);
+	wanpipe_close(card);
+
+	del_timer (&ppp_priv_area->poll_delay_timer);
+	return 0;
+}
+
+/*============================================================================
+ * Build media header.
+ *
+ * The trick here is to put packet type (Ethertype) into 'protocol' field of
+ * the socket buffer, so that we don't forget it.  If packet type is not
+ * supported, set skb->protocol to 0 and discard packet later.
+ *
+ * Return:	media header length.
+ */
+static int if_header(struct sk_buff *skb, struct net_device *dev,
+	unsigned short type, void *daddr, void *saddr, unsigned len)
+{
+	switch (type)
+	{
+		case ETH_P_IP:
+		case ETH_P_IPX:
+			skb->protocol = htons(type);
+			break;
+
+		default:
+			skb->protocol = 0;
+	}
+
+	return PPP_HDR_LEN;
+}
+
+/*============================================================================
+ * Re-build media header.
+ *
+ * Return:	1	physical address resolved.
+ *		0	physical address not resolved
+ */
+static int if_rebuild_hdr (struct sk_buff *skb)
+{
+	struct net_device *dev = skb->dev;
+	ppp_private_area_t *ppp_priv_area = dev->priv;
+	sdla_t *card = ppp_priv_area->card;
+
+	printk(KERN_INFO "%s: rebuild_header() called for interface %s!\n",
+		card->devname, dev->name);
+	return 1;
+}
+
+/*============================================================================
+ * Handle transmit timeout event from netif watchdog
+ */
+static void if_tx_timeout(struct net_device *dev)
+{
+    	ppp_private_area_t* chan = dev->priv;
+	sdla_t *card = chan->card;
+	
+	/* If our device stays busy for at least 5 seconds then we will
+	 * kick start the device by making dev->tbusy = 0.  We expect
+	 * that our device never stays busy more than 5 seconds. So this                 
+	 * is only used as a last resort.
+	 */
+
+	++ chan->if_send_stat.if_send_tbusy;
+	++card->wandev.stats.collisions;
+
+	printk (KERN_INFO "%s: Transmit timed out on %s\n", card->devname,dev->name);
+	++chan->if_send_stat.if_send_tbusy_timeout;
+	netif_wake_queue (dev);
+}
+
+
+
+/*============================================================================
+ * Send a packet on a network interface.
+ * o set tbusy flag (marks start of the transmission) to block a timer-based
+ *   transmit from overlapping.
+ * o check link state. If link is not up, then drop the packet.
+ * o execute adapter send command.
+ * o free socket buffer
+ *
+ * Return:	0	complete (socket buffer must be freed)
+ *		non-0	packet may be re-transmitted (tbusy must be set)
+ *
+ * Notes:
+ * 1. This routine is called either by the protocol stack or by the "net
+ *    bottom half" (with interrupts enabled).
+ * 2. Setting tbusy flag will inhibit further transmit requests from the
+ *    protocol stack and can be used for flow control with protocol layer.
+ */
+static int if_send (struct sk_buff *skb, struct net_device *dev)
+{
+	ppp_private_area_t *ppp_priv_area = dev->priv;
+	sdla_t *card = ppp_priv_area->card;
+	unsigned char *sendpacket;
+	unsigned long smp_flags;
+	ppp_flags_t *flags = card->flags;
+	int udp_type;
+	int err=0;
+	
+	++ppp_priv_area->if_send_stat.if_send_entry;
+
+	netif_stop_queue(dev);
+	
+	if (skb == NULL) {
+
+		/* If we get here, some higher layer thinks we've missed an
+		 * tx-done interrupt.
+		 */
+		printk(KERN_INFO "%s: interface %s got kicked!\n",
+			card->devname, dev->name);
+		
+		++ppp_priv_area->if_send_stat.if_send_skb_null;
+	
+		netif_wake_queue(dev);
+		return 0;
+	}
+
+	sendpacket = skb->data;
+
+	udp_type = udp_pkt_type( skb, card );
+
+
+	if (udp_type == UDP_PTPIPE_TYPE){
+		if(store_udp_mgmt_pkt(UDP_PKT_FRM_STACK, card, skb, dev,
+                	              ppp_priv_area)){
+	               	flags->imask |= PPP_INTR_TIMER;
+		}
+		++ppp_priv_area->if_send_stat.if_send_PIPE_request;
+		netif_start_queue(dev);
+		return 0;
+	}
+
+	/* Check for broadcast and multicast addresses 
+	 * If found, drop (deallocate) a packet and return.
+	 */
+	if(chk_bcast_mcast_addr(card, dev, skb)){
+		++card->wandev.stats.tx_dropped;
+		dev_kfree_skb_any(skb);
+		netif_start_queue(dev);
+		return 0;
+	}
+
+
+ 	if(card->hw.type != SDLA_S514){
+		s508_lock(card,&smp_flags);
+	}
+
+    	if (test_and_set_bit(SEND_CRIT, (void*)&card->wandev.critical)) {
+
+		printk(KERN_INFO "%s: Critical in if_send: %lx\n",
+				card->wandev.name,card->wandev.critical);
+		
+		++card->wandev.stats.tx_dropped;
+		++ppp_priv_area->if_send_stat.if_send_critical_non_ISR;
+		netif_start_queue(dev);
+		goto if_send_exit_crit;
+	}
+
+	if (card->wandev.state != WAN_CONNECTED) {
+
+		++ppp_priv_area->if_send_stat.if_send_wan_disconnected;
+        	++card->wandev.stats.tx_dropped;
+		netif_start_queue(dev);
+		
+     	} else if (!skb->protocol) {
+		++ppp_priv_area->if_send_stat.if_send_protocol_error;
+        	++card->wandev.stats.tx_errors;
+		netif_start_queue(dev);
+		
+	} else {
+
+		/*If it's IPX change the network numbers to 0 if they're ours.*/
+		if( skb->protocol == htons(ETH_P_IPX) ) {
+			if(ppp_priv_area->enable_IPX) {
+				switch_net_numbers( skb->data, 
+					ppp_priv_area->network_number, 0);
+			} else {
+				++card->wandev.stats.tx_dropped;
+				netif_start_queue(dev);
+				goto if_send_exit_crit;
+			}
+		}
+
+		if (ppp_send(card, skb->data, skb->len, skb->protocol)) {
+			netif_stop_queue(dev);
+			++ppp_priv_area->if_send_stat.if_send_adptr_bfrs_full;
+			++ppp_priv_area->if_send_stat.if_send_tx_int_enabled;
+		} else {
+			++ppp_priv_area->if_send_stat.if_send_bfr_passed_to_adptr;
+			++card->wandev.stats.tx_packets;
+			card->wandev.stats.tx_bytes += skb->len;
+			netif_start_queue(dev);
+			dev->trans_start = jiffies;
+		}
+    	}
+	
+if_send_exit_crit:
+	
+	if (!(err=netif_queue_stopped(dev))){
+      		dev_kfree_skb_any(skb);
+	}else{
+		ppp_priv_area->tick_counter = jiffies;
+		flags->imask |= PPP_INTR_TXRDY;	/* unmask Tx interrupts */
+	}
+	
+	clear_bit(SEND_CRIT,&card->wandev.critical);
+	if(card->hw.type != SDLA_S514){	
+		s508_unlock(card,&smp_flags);
+	}
+
+	return err;
+}
+
+
+/*=============================================================================
+ * Store a UDP management packet for later processing.
+ */
+
+static int store_udp_mgmt_pkt(char udp_pkt_src, sdla_t* card,
+                                struct sk_buff *skb, struct net_device* dev,
+                                ppp_private_area_t* ppp_priv_area )
+{
+	int udp_pkt_stored = 0;
+
+	if(!ppp_priv_area->udp_pkt_lgth && (skb->len<=MAX_LGTH_UDP_MGNT_PKT)){
+        	ppp_priv_area->udp_pkt_lgth = skb->len;
+		ppp_priv_area->udp_pkt_src = udp_pkt_src;
+       		memcpy(ppp_priv_area->udp_pkt_data, skb->data, skb->len);
+		ppp_priv_area->timer_int_enabled |= TMR_INT_ENABLED_UDP;
+		ppp_priv_area->protocol = skb->protocol;
+		udp_pkt_stored = 1;
+	}else{
+		if (skb->len > MAX_LGTH_UDP_MGNT_PKT){
+			printk(KERN_INFO "%s: PIPEMON UDP request too long : %i\n",
+				card->devname, skb->len);
+		}else{
+			printk(KERN_INFO "%s: PIPEMON UPD request already pending\n",
+				card->devname);
+		}
+		ppp_priv_area->udp_pkt_lgth = 0;
+	}
+
+	if(udp_pkt_src == UDP_PKT_FRM_STACK){
+		dev_kfree_skb_any(skb);
+	}else{
+                dev_kfree_skb_any(skb);
+	}
+
+	return(udp_pkt_stored);
+}
+
+
+
+/*============================================================================
+ * Reply to UDP Management system.
+ * Return length of reply.
+ */
+static int reply_udp( unsigned char *data, unsigned int mbox_len ) 
+{
+	unsigned short len, udp_length, temp, ip_length;
+	unsigned long ip_temp;
+	int even_bound = 0;
+	ppp_udp_pkt_t *p_udp_pkt = (ppp_udp_pkt_t *)data;
+ 
+	/* Set length of packet */
+	len = sizeof(ip_pkt_t)+ 
+	      sizeof(udp_pkt_t)+
+	      sizeof(wp_mgmt_t)+
+	      sizeof(cblock_t)+
+	      mbox_len;
+
+	/* fill in UDP reply */
+  	p_udp_pkt->wp_mgmt.request_reply = UDPMGMT_REPLY; 
+
+	/* fill in UDP length */
+	udp_length = sizeof(udp_pkt_t)+ 
+		     sizeof(wp_mgmt_t)+
+		     sizeof(cblock_t)+
+		     mbox_len; 
+  
+ 
+	/* put it on an even boundary */
+	if ( udp_length & 0x0001 ) {
+		udp_length += 1;
+		len += 1;
+		even_bound=1;
+	} 
+	
+	temp = (udp_length<<8)|(udp_length>>8);
+	p_udp_pkt->udp_pkt.udp_length = temp;		
+
+ 
+	/* swap UDP ports */
+	temp = p_udp_pkt->udp_pkt.udp_src_port;
+	p_udp_pkt->udp_pkt.udp_src_port = 
+			p_udp_pkt->udp_pkt.udp_dst_port; 
+	p_udp_pkt->udp_pkt.udp_dst_port = temp;
+
+
+	/* add UDP pseudo header */
+	temp = 0x1100;
+	*((unsigned short *)(p_udp_pkt->data+mbox_len+even_bound)) = temp;
+	temp = (udp_length<<8)|(udp_length>>8);
+	*((unsigned short *)(p_udp_pkt->data+mbox_len+even_bound+2)) = temp;
+ 
+	/* calculate UDP checksum */
+	p_udp_pkt->udp_pkt.udp_checksum = 0;
+	p_udp_pkt->udp_pkt.udp_checksum = 
+		calc_checksum(&data[UDP_OFFSET],udp_length+UDP_OFFSET);
+
+	/* fill in IP length */
+	ip_length = udp_length + sizeof(ip_pkt_t);
+	temp = (ip_length<<8)|(ip_length>>8);
+  	p_udp_pkt->ip_pkt.total_length = temp;
+ 
+	/* swap IP addresses */
+	ip_temp = p_udp_pkt->ip_pkt.ip_src_address;
+	p_udp_pkt->ip_pkt.ip_src_address = p_udp_pkt->ip_pkt.ip_dst_address;
+	p_udp_pkt->ip_pkt.ip_dst_address = ip_temp;
+
+	/* fill in IP checksum */
+	p_udp_pkt->ip_pkt.hdr_checksum = 0;
+	p_udp_pkt->ip_pkt.hdr_checksum = calc_checksum(data,sizeof(ip_pkt_t));
+
+	return len;
+
+} /* reply_udp */
+
+unsigned short calc_checksum (char *data, int len)
+{
+	unsigned short temp; 
+	unsigned long sum=0;
+	int i;
+
+	for( i = 0; i <len; i+=2 ) {
+		memcpy(&temp,&data[i],2);
+		sum += (unsigned long)temp;
+	}
+
+	while (sum >> 16 ) {
+		sum = (sum & 0xffffUL) + (sum >> 16);
+	}
+
+	temp = (unsigned short)sum;
+	temp = ~temp;
+
+	if( temp == 0 ) 
+		temp = 0xffff;
+
+	return temp;	
+}
+
+/*
+   If incoming is 0 (outgoing)- if the net numbers is ours make it 0
+   if incoming is 1 - if the net number is 0 make it ours 
+
+*/
+static void switch_net_numbers(unsigned char *sendpacket, unsigned long network_number, unsigned char incoming)
+{
+	unsigned long pnetwork_number;
+
+	pnetwork_number = (unsigned long)((sendpacket[6] << 24) + 
+			  (sendpacket[7] << 16) + (sendpacket[8] << 8) + 
+			  sendpacket[9]);
+
+	if (!incoming) {
+		//If the destination network number is ours, make it 0
+		if( pnetwork_number == network_number) {
+			sendpacket[6] = sendpacket[7] = sendpacket[8] = 
+					 sendpacket[9] = 0x00;
+		}
+	} else {
+		//If the incoming network is 0, make it ours
+		if( pnetwork_number == 0) {
+			sendpacket[6] = (unsigned char)(network_number >> 24);
+			sendpacket[7] = (unsigned char)((network_number & 
+					 0x00FF0000) >> 16);
+			sendpacket[8] = (unsigned char)((network_number & 
+					 0x0000FF00) >> 8);
+			sendpacket[9] = (unsigned char)(network_number & 
+					 0x000000FF);
+		}
+	}
+
+
+	pnetwork_number = (unsigned long)((sendpacket[18] << 24) + 
+			  (sendpacket[19] << 16) + (sendpacket[20] << 8) + 
+			  sendpacket[21]);
+
+	if( !incoming ) {
+		//If the source network is ours, make it 0
+		if( pnetwork_number == network_number) {
+			sendpacket[18] = sendpacket[19] = sendpacket[20] = 
+					 sendpacket[21] = 0x00;
+		}
+	} else {
+		//If the source network is 0, make it ours
+		if( pnetwork_number == 0 ) {
+			sendpacket[18] = (unsigned char)(network_number >> 24);
+			sendpacket[19] = (unsigned char)((network_number & 
+					 0x00FF0000) >> 16);
+			sendpacket[20] = (unsigned char)((network_number & 
+					 0x0000FF00) >> 8);
+			sendpacket[21] = (unsigned char)(network_number & 
+					 0x000000FF);
+		}
+	}
+} /* switch_net_numbers */
+
+/*============================================================================
+ * Get ethernet-style interface statistics.
+ * Return a pointer to struct net_device_stats.
+ */
+static struct net_device_stats *if_stats(struct net_device *dev)
+{
+
+	ppp_private_area_t *ppp_priv_area = dev->priv;
+	sdla_t* card;
+	
+	if( ppp_priv_area == NULL )
+		return NULL;
+
+	card = ppp_priv_area->card;
+	return &card->wandev.stats;
+}
+
+/****** PPP Firmware Interface Functions ************************************/
+
+/*============================================================================
+ * Read firmware code version.
+ *	Put code version as ASCII string in str. 
+ */
+static int ppp_read_version(sdla_t *card, char *str)
+{
+	ppp_mbox_t *mb = card->mbox;
+	int err;
+
+	memset(&mb->cmd, 0, sizeof(ppp_cmd_t));
+	mb->cmd.command = PPP_READ_CODE_VERSION;
+	err = sdla_exec(mb) ? mb->cmd.result : CMD_TIMEOUT;
+
+	if (err != CMD_OK)
+ 
+		ppp_error(card, err, mb);
+
+	else if (str) {
+
+		int len = mb->cmd.length;
+
+		memcpy(str, mb->data, len);
+		str[len] = '\0';
+
+	}
+
+	return err;
+}
+/*===========================================================================
+ * Set Out-Bound Authentication.
+*/
+static int ppp_set_outbnd_auth (sdla_t *card, ppp_private_area_t *ppp_priv_area)
+{
+	ppp_mbox_t *mb = card->mbox;
+	int err;
+
+	memset(&mb->cmd, 0, sizeof(ppp_cmd_t));
+	memset(&mb->data, 0, (strlen(ppp_priv_area->userid) + 
+					strlen(ppp_priv_area->passwd) + 2 ) );
+	memcpy(mb->data, ppp_priv_area->userid, strlen(ppp_priv_area->userid));
+	memcpy((mb->data + strlen(ppp_priv_area->userid) + 1), 
+		ppp_priv_area->passwd, strlen(ppp_priv_area->passwd));	
+	
+	mb->cmd.length  = strlen(ppp_priv_area->userid) + 
+					strlen(ppp_priv_area->passwd) + 2 ;
+	
+	mb->cmd.command = PPP_SET_OUTBOUND_AUTH;
+
+	err = sdla_exec(mb) ? mb->cmd.result : CMD_TIMEOUT;
+
+	if (err != CMD_OK)
+		ppp_error(card, err, mb);
+
+	return err;
+}
+
+/*===========================================================================
+ * Set In-Bound Authentication.
+*/
+static int ppp_set_inbnd_auth (sdla_t *card, ppp_private_area_t *ppp_priv_area)
+{
+	ppp_mbox_t *mb = card->mbox;
+	int err, i;
+	char* user_tokens[32];
+	char* pass_tokens[32];
+	int userids, passwds;
+	int add_ptr;
+
+	memset(&mb->cmd, 0, sizeof(ppp_cmd_t));
+	memset(&mb->data, 0, 1008);
+	memcpy(mb->data, ppp_priv_area->sysname, 
+						strlen(ppp_priv_area->sysname));
+	
+	/* Parse the userid string and the password string and build a string
+	   to copy it to the data area of the command structure.   The string
+	   will look like "SYS_NAME<NULL>USER1<NULL>PASS1<NULL>USER2<NULL>PASS2
+	   ....<NULL> " 
+	 */
+	userids = tokenize( ppp_priv_area->userid, user_tokens);
+	passwds = tokenize( ppp_priv_area->passwd, pass_tokens);
+	
+	if (userids != passwds){
+		printk(KERN_INFO "%s: Number of passwords does not equal the number of user ids\n", card->devname);
+		return 1;	
+	}
+
+	add_ptr = strlen(ppp_priv_area->sysname) + 1;
+	for (i=0; i<userids; i++){
+		memcpy((mb->data + add_ptr), user_tokens[i], 
+							strlen(user_tokens[i]));
+		memcpy((mb->data + add_ptr + strlen(user_tokens[i]) + 1), 
+					pass_tokens[i], strlen(pass_tokens[i]));
+		add_ptr = add_ptr + strlen(user_tokens[i]) + 1 + 
+						strlen(pass_tokens[i]) + 1;
+	}
+
+	mb->cmd.length  = add_ptr + 1;
+	mb->cmd.command = PPP_SET_INBOUND_AUTH;
+
+	err = sdla_exec(mb) ? mb->cmd.result : CMD_TIMEOUT;
+
+	if (err != CMD_OK)
+		ppp_error(card, err, mb);
+
+	return err;
+}
+
+
+/*============================================================================
+ * Tokenize string.
+ *      Parse a string of the following syntax:
+ *              <arg1>,<arg2>,...
+ *      and fill array of tokens with pointers to string elements.
+ *
+ */
+static int tokenize (char *str, char **tokens)
+{
+        int cnt = 0;
+
+        tokens[0] = strsep(&str, "/");
+        while (tokens[cnt] && (cnt < 32 - 1))
+        {
+                tokens[cnt] = strstrip(tokens[cnt], " \t");
+                tokens[++cnt] = strsep(&str, "/");
+        }
+	return cnt;
+}
+
+/*============================================================================
+ * Strip leading and trailing spaces off the string str.
+ */
+static char* strstrip (char *str, char* s)
+{
+        char *eos = str + strlen(str);          /* -> end of string */
+
+        while (*str && strchr(s, *str))
+                ++str                           /* strip leading spaces */
+        ;
+        while ((eos > str) && strchr(s, *(eos - 1)))
+                --eos                           /* strip trailing spaces */
+        ;
+        *eos = '\0';
+        return str;
+}
+/*============================================================================
+ * Configure PPP firmware.
+ */
+static int ppp_configure(sdla_t *card, void *data)
+{
+	ppp_mbox_t *mb = card->mbox;
+	int data_len = sizeof(ppp508_conf_t); 
+	int err;
+
+	memset(&mb->cmd, 0, sizeof(ppp_cmd_t));
+	memcpy(mb->data, data, data_len);
+	mb->cmd.length  = data_len;
+	mb->cmd.command = PPP_SET_CONFIG;
+	err = sdla_exec(mb) ? mb->cmd.result : CMD_TIMEOUT;
+
+	if (err != CMD_OK) 
+		ppp_error(card, err, mb);
+	
+	return err;
+}
+
+/*============================================================================
+ * Set interrupt mode.
+ */
+static int ppp_set_intr_mode(sdla_t *card, unsigned char mode)
+{
+	ppp_mbox_t *mb = card->mbox;
+        ppp_intr_info_t *ppp_intr_data = (ppp_intr_info_t *) &mb->data[0];
+	int err;
+
+	memset(&mb->cmd, 0, sizeof(ppp_cmd_t));
+	ppp_intr_data->i_enable = mode;
+
+	ppp_intr_data->irq = card->hw.irq;
+	mb->cmd.length = 2;
+
+       /* If timer has been enabled, set the timer delay to 1sec */
+       if (mode & 0x80){
+       		ppp_intr_data->timer_len = 250; //5;//100; //250;
+                mb->cmd.length = 4;
+        }
+	
+	mb->cmd.command = PPP_SET_INTR_FLAGS;
+	err = sdla_exec(mb) ? mb->cmd.result : CMD_TIMEOUT;
+	
+	if (err != CMD_OK) 
+		ppp_error(card, err, mb);
+ 		
+
+	return err;
+}
+
+/*============================================================================
+ * Enable communications.
+ */
+static int ppp_comm_enable(sdla_t *card)
+{
+	ppp_mbox_t *mb = card->mbox;
+	int err;
+
+	memset(&mb->cmd, 0, sizeof(ppp_cmd_t));
+	mb->cmd.command = PPP_COMM_ENABLE;
+	err = sdla_exec(mb) ? mb->cmd.result : CMD_TIMEOUT;
+	
+	if (err != CMD_OK) 
+		ppp_error(card, err, mb);
+	else	
+		card->u.p.comm_enabled = 1;	
+
+	return err;
+}
+
+/*============================================================================
+ * Disable communications.
+ */
+static int ppp_comm_disable(sdla_t *card)
+{
+	ppp_mbox_t *mb = card->mbox;
+	int err;
+
+	memset(&mb->cmd, 0, sizeof(ppp_cmd_t));
+	mb->cmd.command = PPP_COMM_DISABLE;
+	err = sdla_exec(mb) ? mb->cmd.result : CMD_TIMEOUT;
+	if (err != CMD_OK) 
+		ppp_error(card, err, mb);
+	else
+		card->u.p.comm_enabled = 0;
+
+	return err;
+}
+
+static int ppp_comm_disable_shutdown(sdla_t *card)
+{
+	ppp_mbox_t *mb = card->mbox;
+	ppp_intr_info_t *ppp_intr_data;
+	int err;
+
+	if (!mb){
+		return 1;
+	}
+	
+	ppp_intr_data = (ppp_intr_info_t *) &mb->data[0];
+	
+	/* Disable all interrupts */
+	memset(&mb->cmd, 0, sizeof(ppp_cmd_t));
+	ppp_intr_data->i_enable = 0;
+
+	ppp_intr_data->irq = card->hw.irq;
+	mb->cmd.length = 2;
+
+	mb->cmd.command = PPP_SET_INTR_FLAGS;
+	err = sdla_exec(mb) ? mb->cmd.result : CMD_TIMEOUT;
+
+	/* Disable communicatinons */
+	memset(&mb->cmd, 0, sizeof(ppp_cmd_t));
+	mb->cmd.command = PPP_COMM_DISABLE;
+	err = sdla_exec(mb) ? mb->cmd.result : CMD_TIMEOUT;
+
+	card->u.p.comm_enabled = 0;
+
+	return 0;
+}
+
+
+
+/*============================================================================
+ * Get communications error statistics.
+ */
+static int ppp_get_err_stats(sdla_t *card)
+{
+	ppp_mbox_t *mb = card->mbox;
+	int err;
+
+	memset(&mb->cmd, 0, sizeof(ppp_cmd_t));
+	mb->cmd.command = PPP_READ_ERROR_STATS;
+	err = sdla_exec(mb) ? mb->cmd.result : CMD_TIMEOUT;
+	
+	if (err == CMD_OK) {
+		
+		ppp_err_stats_t* stats = (void*)mb->data;
+		card->wandev.stats.rx_over_errors    = stats->rx_overrun;
+		card->wandev.stats.rx_crc_errors     = stats->rx_bad_crc;
+		card->wandev.stats.rx_missed_errors  = stats->rx_abort;
+		card->wandev.stats.rx_length_errors  = stats->rx_lost;
+		card->wandev.stats.tx_aborted_errors = stats->tx_abort;
+	
+	} else 
+		ppp_error(card, err, mb);
+	
+	return err;
+}
+
+/*============================================================================
+ * Send packet.
+ *	Return:	0 - o.k.
+ *		1 - no transmit buffers available
+ */
+static int ppp_send (sdla_t *card, void *data, unsigned len, unsigned proto)
+{
+	ppp_buf_ctl_t *txbuf = card->u.p.txbuf;
+
+	if (txbuf->flag)
+                return 1;
+	
+	sdla_poke(&card->hw, txbuf->buf.ptr, data, len);
+
+	txbuf->length = len;		/* frame length */
+	
+	if (proto == htons(ETH_P_IPX))
+		txbuf->proto = 0x01;	/* protocol ID */
+	else
+		txbuf->proto = 0x00;	/* protocol ID */
+	
+	txbuf->flag = 1;		/* start transmission */
+
+	/* Update transmit buffer control fields */
+	card->u.p.txbuf = ++txbuf;
+
+	if ((void*)txbuf > card->u.p.txbuf_last)
+		card->u.p.txbuf = card->u.p.txbuf_base;
+
+	return 0;
+}
+
+/****** Firmware Error Handler **********************************************/
+
+/*============================================================================
+ * Firmware error handler.
+ *	This routine is called whenever firmware command returns non-zero
+ *	return code.
+ *
+ * Return zero if previous command has to be cancelled.
+ */
+static int ppp_error(sdla_t *card, int err, ppp_mbox_t *mb)
+{
+	unsigned cmd = mb->cmd.command;
+
+	switch (err) {
+
+		case CMD_TIMEOUT:
+			printk(KERN_ERR "%s: command 0x%02X timed out!\n",
+				card->devname, cmd);
+			break;
+
+		default:
+			printk(KERN_INFO "%s: command 0x%02X returned 0x%02X!\n"
+				, card->devname, cmd, err);
+	}
+
+	return 0;
+}
+
+/****** Interrupt Handlers **************************************************/
+
+/*============================================================================
+ * PPP interrupt service routine.
+ */
+static void wpp_isr (sdla_t *card)
+{
+	ppp_flags_t *flags = card->flags;
+	char *ptr = &flags->iflag;
+	struct net_device *dev = card->wandev.dev;
+	int i;
+
+	card->in_isr = 1;
+	++card->statistics.isr_entry;
+
+	if (!dev && flags->iflag != PPP_INTR_CMD){
+		card->in_isr = 0;
+		flags->iflag = 0;
+		return;
+	}
+	
+	if (test_bit(PERI_CRIT, (void*)&card->wandev.critical)) {
+		card->in_isr = 0;
+		flags->iflag = 0;
+		return;
+	}
+	
+	
+	if(card->hw.type != SDLA_S514){
+		if (test_bit(SEND_CRIT, (void*)&card->wandev.critical)) {
+			++card->statistics.isr_already_critical;
+			printk (KERN_INFO "%s: Critical while in ISR!\n",
+					card->devname);
+			card->in_isr = 0;
+			flags->iflag = 0;
+			return;
+		}
+	}
+
+	switch (flags->iflag) {
+
+		case PPP_INTR_RXRDY:	/* receive interrupt  0x01  (bit 0)*/
+			++card->statistics.isr_rx;
+			rx_intr(card);
+			break;
+
+		case PPP_INTR_TXRDY:	/* transmit interrupt  0x02 (bit 1)*/
+			++card->statistics.isr_tx;
+			flags->imask &= ~PPP_INTR_TXRDY;
+			netif_wake_queue(dev);
+			break;
+
+		case PPP_INTR_CMD:      /* interface command completed */
+			++Intr_test_counter;
+			++card->statistics.isr_intr_test;
+			break;
+
+		case PPP_INTR_MODEM:    /* modem status change (DCD, CTS) 0x04 (bit 2)*/
+		case PPP_INTR_DISC:  	/* Data link disconnected 0x10  (bit 4)*/	
+		case PPP_INTR_OPEN:   	/* Data link open 0x20  (bit 5)*/
+		case PPP_INTR_DROP_DTR:	/* DTR drop timeout expired  0x40 bit 6 */
+			event_intr(card);
+			break;
+	
+		case PPP_INTR_TIMER:
+			timer_intr(card);
+			break;	 
+
+		default:	/* unexpected interrupt */
+			++card->statistics.isr_spurious;
+			printk(KERN_INFO "%s: spurious interrupt 0x%02X!\n", 
+				card->devname, flags->iflag);
+			printk(KERN_INFO "%s: ID Bytes = ",card->devname);
+	 		for(i = 0; i < 8; i ++)
+				printk(KERN_INFO "0x%02X ", *(ptr + 0x28 + i));
+			printk(KERN_INFO "\n");	
+	}
+	
+	card->in_isr = 0;
+	flags->iflag = 0;
+	return;
+}
+
+/*============================================================================
+ * Receive interrupt handler.
+ */
+static void rx_intr(sdla_t *card)
+{
+	ppp_buf_ctl_t *rxbuf = card->rxmb;
+	struct net_device *dev = card->wandev.dev;
+	ppp_private_area_t *ppp_priv_area;
+	struct sk_buff *skb;
+	unsigned len;
+	void *buf;
+	int i;
+        ppp_flags_t *flags = card->flags;
+        char *ptr = &flags->iflag;
+	int udp_type;
+	
+
+	if (rxbuf->flag != 0x01) {
+
+		printk(KERN_INFO 
+			"%s: corrupted Rx buffer @ 0x%X, flag = 0x%02X!\n", 
+			card->devname, (unsigned)rxbuf, rxbuf->flag);
+	
+		printk(KERN_INFO "%s: ID Bytes = ",card->devname);
+	 	
+		for(i = 0; i < 8; i ++)
+			printk(KERN_INFO "0x%02X ", *(ptr + 0x28 + i));
+		printk(KERN_INFO "\n");	
+		
+		++card->statistics.rx_intr_corrupt_rx_bfr;
+
+
+		/* Bug Fix: Mar 6 2000
+                 * If we get a corrupted mailbox, it means that driver 
+                 * is out of sync with the firmware. There is no recovery.
+                 * If we don't turn off all interrupts for this card
+                 * the machine will crash. 
+                 */
+		printk(KERN_INFO "%s: Critical router failure ...!!!\n", card->devname);
+		printk(KERN_INFO "Please contact Sangoma Technologies !\n");
+		ppp_set_intr_mode(card,0);
+		return;
+	}
+      
+	if (dev && netif_running(dev) && dev->priv){
+	
+		len  = rxbuf->length;
+		ppp_priv_area = dev->priv;
+
+		/* Allocate socket buffer */
+		skb = dev_alloc_skb(len);
+
+		if (skb != NULL) {
+		
+			/* Copy data to the socket buffer */
+			unsigned addr = rxbuf->buf.ptr;
+
+			if ((addr + len) > card->u.p.rx_top + 1) {
+			
+				unsigned tmp = card->u.p.rx_top - addr + 1;
+				buf = skb_put(skb, tmp);
+				sdla_peek(&card->hw, addr, buf, tmp);
+				addr = card->u.p.rx_base;
+				len -= tmp;
+			}
+			buf = skb_put(skb, len);
+			sdla_peek(&card->hw, addr, buf, len);
+
+			/* Decapsulate packet */
+        		switch (rxbuf->proto) {
+	
+				case 0x00:
+					skb->protocol = htons(ETH_P_IP);
+					break;
+
+				case 0x01:
+					skb->protocol = htons(ETH_P_IPX);
+					break;
+			}
+
+			udp_type = udp_pkt_type( skb, card );
+
+			if (udp_type == UDP_PTPIPE_TYPE){
+
+				/* Handle a UDP Request in Timer Interrupt */
+				if(store_udp_mgmt_pkt(UDP_PKT_FRM_NETWORK, card, skb, dev,
+                	              			ppp_priv_area)){
+	               			flags->imask |= PPP_INTR_TIMER;
+				}
+				++ppp_priv_area->rx_intr_stat.rx_intr_PIPE_request;
+
+
+			} else if (handle_IPXWAN(skb->data,card->devname, 
+						 ppp_priv_area->enable_IPX, 
+						 ppp_priv_area->network_number, 
+						 skb->protocol)) {
+			
+				/* Handle an IPXWAN packet */
+				if( ppp_priv_area->enable_IPX) {
+					
+					/* Make sure we are not already sending */
+					if (!test_bit(SEND_CRIT, &card->wandev.critical)){
+					 	ppp_send(card, skb->data, skb->len, htons(ETH_P_IPX));
+					}
+					dev_kfree_skb_any(skb);
+
+				} else {
+					++card->wandev.stats.rx_dropped;
+				}
+			} else {
+				/* Pass data up the protocol stack */
+	    			skb->dev = dev;
+				skb->mac.raw  = skb->data;
+
+			    	++card->wandev.stats.rx_packets;
+				card->wandev.stats.rx_bytes += skb->len;
+		    		++ppp_priv_area->rx_intr_stat.rx_intr_bfr_passed_to_stack;	
+				netif_rx(skb);
+				dev->last_rx = jiffies;
+			}
+
+		} else {
+	
+			if (net_ratelimit()){
+				printk(KERN_INFO "%s: no socket buffers available!\n",
+					card->devname);
+			}
+			++card->wandev.stats.rx_dropped;
+			++ppp_priv_area->rx_intr_stat.rx_intr_no_socket;
+		}
+
+	} else {
+		++card->statistics.rx_intr_dev_not_started;
+	}
+
+	/* Release buffer element and calculate a pointer to the next one */
+	rxbuf->flag = 0x00;
+	card->rxmb = ++rxbuf;
+	if ((void*)rxbuf > card->u.p.rxbuf_last)
+		card->rxmb = card->u.p.rxbuf_base;
+}
+
+
+void event_intr (sdla_t *card)
+{
+
+ 	struct net_device* dev = card->wandev.dev;
+        ppp_private_area_t* ppp_priv_area = dev->priv;
+	volatile ppp_flags_t *flags = card->flags;
+
+	switch (flags->iflag){
+
+		case PPP_INTR_MODEM:    /* modem status change (DCD, CTS) 0x04  (bit 2)*/
+
+			if (net_ratelimit()){
+				printk (KERN_INFO "%s: Modem status: DCD=%s CTS=%s\n",
+					card->devname, DCD(flags->mstatus), CTS(flags->mstatus));
+			}
+			break;
+
+		case PPP_INTR_DISC:  	/* Data link disconnected 0x10  (bit 4)*/	
+
+			NEX_PRINTK (KERN_INFO "Data link disconnected intr Cause %X\n",
+					       flags->disc_cause);
+
+			if (flags->disc_cause &
+				(PPP_LOCAL_TERMINATION | PPP_DCD_CTS_DROP |
+				PPP_REMOTE_TERMINATION)) {
+
+				if (card->u.p.ip_mode == WANOPT_PPP_PEER) { 
+					set_bit(0,&Read_connection_info);
+				}
+				wanpipe_set_state(card, WAN_DISCONNECTED);
+
+				show_disc_cause(card, flags->disc_cause);
+				ppp_priv_area->timer_int_enabled |= TMR_INT_ENABLED_PPP_EVENT;
+				flags->imask |= PPP_INTR_TIMER;
+				trigger_ppp_poll(dev);
+			}
+			break;
+
+		case PPP_INTR_OPEN:   	/* Data link open 0x20  (bit 5)*/
+
+			NEX_PRINTK (KERN_INFO "%s: PPP Link Open, LCP=%s IP=%s\n",
+					card->devname,LCP(flags->lcp_state),
+					IP(flags->ip_state));
+
+			if (flags->lcp_state == 0x09 && 
+                           (flags->ip_state == 0x09 || flags->ipx_state == 0x09)){
+
+                                /* Initialize the polling timer and set the state
+                                 * to WAN_CONNNECTED */
+
+
+				/* BUG FIX: When the protocol restarts, during heavy 
+                                 * traffic, board tx buffers and driver tx buffers
+                                 * can go out of sync.  This checks the condition
+                                 * and if the tx buffers are out of sync, the 
+                                 * protocols are restarted. 
+                                 * I don't know why the board tx buffer is out
+                                 * of sync. It could be that a packets is tx
+                                 * while the link is down, but that is not 
+                                 * possible. The other possiblility is that the
+                                 * firmware doesn't reinitialize properly.
+                                 * FIXME: A better fix should be found.
+                                 */ 
+				if (detect_and_fix_tx_bug(card)){
+
+					ppp_comm_disable(card);
+
+					wanpipe_set_state(card, WAN_DISCONNECTED);
+
+					ppp_priv_area->timer_int_enabled |= 
+						TMR_INT_ENABLED_PPP_EVENT;
+					flags->imask |= PPP_INTR_TIMER;
+					break;	
+				}
+
+				card->state_tick = jiffies;
+				wanpipe_set_state(card, WAN_CONNECTED);
+
+				NEX_PRINTK(KERN_INFO "CON: L Tx: %lx  B Tx: %lx || L Rx %lx B Rx %lx\n",
+					(unsigned long)card->u.p.txbuf, *card->u.p.txbuf_next,
+					(unsigned long)card->rxmb, *card->u.p.rxbuf_next);
+
+				/* Tell timer interrupt that PPP event occurred */
+				ppp_priv_area->timer_int_enabled |= TMR_INT_ENABLED_PPP_EVENT;
+				flags->imask |= PPP_INTR_TIMER;
+
+				/* If we are in PEER mode, we must first obtain the
+				 * IP information and then go into the poll routine */
+				if (card->u.p.ip_mode != WANOPT_PPP_PEER){	
+					trigger_ppp_poll(dev);
+				}
+			}
+                   	break;
+
+		case PPP_INTR_DROP_DTR:		/* DTR drop timeout expired  0x40 bit 6 */
+
+			NEX_PRINTK(KERN_INFO "DTR Drop Timeout Interrrupt \n"); 
+
+			if (card->u.p.ip_mode == WANOPT_PPP_PEER) { 
+				set_bit(0,&Read_connection_info);
+			}
+		
+			wanpipe_set_state(card, WAN_DISCONNECTED);
+
+			show_disc_cause(card, flags->disc_cause);
+			ppp_priv_area->timer_int_enabled |= TMR_INT_ENABLED_PPP_EVENT;
+			flags->imask |= PPP_INTR_TIMER;
+			trigger_ppp_poll(dev);
+			break;
+		
+		default:
+			printk(KERN_INFO "%s: Error, Invalid PPP Event\n",card->devname);
+	}
+}
+
+
+
+/* TIMER INTERRUPT */
+
+void timer_intr (sdla_t *card)
+{
+
+        struct net_device* dev = card->wandev.dev;
+        ppp_private_area_t* ppp_priv_area = dev->priv;
+	ppp_flags_t *flags = card->flags;
+
+
+	if (ppp_priv_area->timer_int_enabled & TMR_INT_ENABLED_CONFIG){
+		if (!config_ppp(card)){
+			ppp_priv_area->timer_int_enabled &= 
+					~TMR_INT_ENABLED_CONFIG;	
+		}
+	}
+
+	/* Update statistics */
+	if (ppp_priv_area->timer_int_enabled & TMR_INT_ENABLED_UPDATE){
+		ppp_get_err_stats(card);
+                if(!(--ppp_priv_area->update_comms_stats)){
+			ppp_priv_area->timer_int_enabled &= 
+				~TMR_INT_ENABLED_UPDATE;
+		}
+	}
+
+	/* PPIPEMON UDP request */
+
+	if (ppp_priv_area->timer_int_enabled & TMR_INT_ENABLED_UDP){
+		process_udp_mgmt_pkt(card,dev, ppp_priv_area);
+		ppp_priv_area->timer_int_enabled &= ~TMR_INT_ENABLED_UDP;
+	}
+
+	/* PPP Event */
+	if (ppp_priv_area->timer_int_enabled & TMR_INT_ENABLED_PPP_EVENT){
+
+		if (card->wandev.state == WAN_DISCONNECTED){
+			retrigger_comm(card);
+		}
+
+		/* If the state is CONNECTING, it means that communicatins were
+	 	 * enabled. When the remote side enables its comminication we
+	 	 * should get an interrupt PPP_INTR_OPEN, thus turn off polling 
+		 */
+
+		else if (card->wandev.state == WAN_CONNECTING){
+			/* Turn off the timer interrupt */
+			ppp_priv_area->timer_int_enabled &= ~TMR_INT_ENABLED_PPP_EVENT;
+		}
+
+		/* If state is connected and we are in PEER mode 
+	 	 * poll for an IP address which will be provided by remote end.
+	 	 */
+		else if ((card->wandev.state == WAN_CONNECTED && 
+		  	  card->u.p.ip_mode == WANOPT_PPP_PEER) && 
+		  	  test_bit(0,&Read_connection_info)){
+
+			card->state_tick = jiffies;
+			if (read_connection_info (card)){
+				printk(KERN_INFO "%s: Failed to read PEER IP Addresses\n",
+					card->devname);
+			}else{
+				clear_bit(0,&Read_connection_info);
+				set_bit(1,&Read_connection_info);
+				trigger_ppp_poll(dev);
+			}
+		}else{
+			//FIXME Put the comment back int
+			ppp_priv_area->timer_int_enabled &= ~TMR_INT_ENABLED_PPP_EVENT;
+		}
+
+	}/* End of PPP_EVENT */
+
+
+	/* Only disable the timer interrupt if there are no udp, statistic */
+	/* updates or events pending */
+        if(!ppp_priv_area->timer_int_enabled) {
+                flags->imask &= ~PPP_INTR_TIMER;
+        }
+}
+
+
+static int handle_IPXWAN(unsigned char *sendpacket, char *devname, unsigned char enable_IPX, unsigned long network_number, unsigned short proto)
+{
+	int i;
+
+	if( proto == htons(ETH_P_IPX) ) {
+		//It's an IPX packet
+		if(!enable_IPX) {
+			//Return 1 so we don't pass it up the stack.
+			return 1;
+		}
+	} else {
+		//It's not IPX so pass it up the stack.
+		return 0;
+	}
+
+	if( sendpacket[16] == 0x90 &&
+	    sendpacket[17] == 0x04)
+	{
+		//It's IPXWAN
+
+		if( sendpacket[2] == 0x02 &&
+		    sendpacket[34] == 0x00)
+		{
+			//It's a timer request packet
+			printk(KERN_INFO "%s: Received IPXWAN Timer Request packet\n",devname);
+
+			//Go through the routing options and answer no to every
+			//option except Unnumbered RIP/SAP
+			for(i = 41; sendpacket[i] == 0x00; i += 5)
+			{
+				//0x02 is the option for Unnumbered RIP/SAP
+				if( sendpacket[i + 4] != 0x02)
+				{
+					sendpacket[i + 1] = 0;
+				}
+			}
+
+			//Skip over the extended Node ID option
+			if( sendpacket[i] == 0x04 )
+			{
+				i += 8;
+			}
+
+			//We also want to turn off all header compression opt.
+			for(; sendpacket[i] == 0x80 ;)
+			{
+				sendpacket[i + 1] = 0;
+				i += (sendpacket[i + 2] << 8) + (sendpacket[i + 3]) + 4;
+			}
+
+			//Set the packet type to timer response
+			sendpacket[34] = 0x01;
+
+			printk(KERN_INFO "%s: Sending IPXWAN Timer Response\n",devname);
+		}
+		else if( sendpacket[34] == 0x02 )
+		{
+			//This is an information request packet
+			printk(KERN_INFO "%s: Received IPXWAN Information Request packet\n",devname);
+
+			//Set the packet type to information response
+			sendpacket[34] = 0x03;
+
+			//Set the router name
+			sendpacket[51] = 'P';
+			sendpacket[52] = 'T';
+			sendpacket[53] = 'P';
+			sendpacket[54] = 'I';
+			sendpacket[55] = 'P';
+			sendpacket[56] = 'E';
+			sendpacket[57] = '-';
+			sendpacket[58] = CVHexToAscii(network_number >> 28);
+			sendpacket[59] = CVHexToAscii((network_number & 0x0F000000)>> 24);
+			sendpacket[60] = CVHexToAscii((network_number & 0x00F00000)>> 20);
+			sendpacket[61] = CVHexToAscii((network_number & 0x000F0000)>> 16);
+			sendpacket[62] = CVHexToAscii((network_number & 0x0000F000)>> 12);
+			sendpacket[63] = CVHexToAscii((network_number & 0x00000F00)>> 8);
+			sendpacket[64] = CVHexToAscii((network_number & 0x000000F0)>> 4);
+			sendpacket[65] = CVHexToAscii(network_number & 0x0000000F);
+			for(i = 66; i < 99; i+= 1)
+			{
+				sendpacket[i] = 0;
+			}
+
+			printk(KERN_INFO "%s: Sending IPXWAN Information Response packet\n",devname);
+		}
+		else
+		{
+			printk(KERN_INFO "%s: Unknown IPXWAN packet!\n",devname);
+			return 0;
+		}
+
+		//Set the WNodeID to our network address
+		sendpacket[35] = (unsigned char)(network_number >> 24);
+		sendpacket[36] = (unsigned char)((network_number & 0x00FF0000) >> 16);
+		sendpacket[37] = (unsigned char)((network_number & 0x0000FF00) >> 8);
+		sendpacket[38] = (unsigned char)(network_number & 0x000000FF);
+
+		return 1;
+	} else {
+		//If we get here it's an IPX-data packet, so it'll get passed up the stack.
+
+		//switch the network numbers
+		switch_net_numbers(sendpacket, network_number, 1);	
+		return 0;
+	}
+}
+
+/****** Background Polling Routines  ****************************************/
+
+/* All polling functions are invoked by the TIMER interrupt in the wpp_isr 
+ * routine.  
+ */
+
+/*============================================================================
+ * Monitor active link phase.
+ */
+static void process_route (sdla_t *card)
+{
+	ppp_flags_t *flags = card->flags;
+	struct net_device *dev = card->wandev.dev;
+	ppp_private_area_t *ppp_priv_area = dev->priv;
+	
+	if ((card->u.p.ip_mode == WANOPT_PPP_PEER) &&
+	    (flags->ip_state == 0x09)){ 
+
+		/* We get ip_local from the firmware in PEER mode.
+	         * Therefore, if ip_local is 0, we failed to obtain
+         	 * the remote IP address. */
+		if (ppp_priv_area->ip_local == 0) 
+			return;
+		
+		printk(KERN_INFO "%s: IPCP State Opened.\n", card->devname);
+		if (read_info( card )) {
+   			printk(KERN_INFO 
+				"%s: An error occurred in IP assignment.\n", 
+				card->devname);
+		} else {
+			struct in_device *in_dev = dev->ip_ptr;
+			if (in_dev != NULL ) {
+				struct in_ifaddr *ifa = in_dev->ifa_list;
+
+				printk(KERN_INFO "%s: Assigned Lcl. Addr: %u.%u.%u.%u\n", 
+					card->devname, NIPQUAD(ifa->ifa_local));
+				printk(KERN_INFO "%s: Assigned Rmt. Addr: %u.%u.%u.%u\n", 
+						card->devname, NIPQUAD(ifa->ifa_address));
+			}else{
+				printk(KERN_INFO 
+				"%s: Error: Failed to add a route for PPP interface %s\n",
+					card->devname,dev->name);	
+			}
+		}
+	}
+}
+
+/*============================================================================
+ * Monitor physical link disconnected phase.
+ *  o if interface is up and the hold-down timeout has expired, then retry
+ *    connection.
+ */
+static void retrigger_comm(sdla_t *card)
+{
+	struct net_device *dev = card->wandev.dev;
+
+	if (dev && ((jiffies - card->state_tick) > HOLD_DOWN_TIME)) {
+
+		wanpipe_set_state(card, WAN_CONNECTING);
+
+		if(ppp_comm_enable(card) == CMD_OK){
+			init_ppp_tx_rx_buff( card );
+		}	         
+	}
+}
+
+/****** Miscellaneous Functions *********************************************/
+
+/*============================================================================
+ * Configure S508 adapter.
+ */
+static int config508(struct net_device *dev, sdla_t *card)
+{
+	ppp508_conf_t cfg;
+	struct in_device *in_dev = dev->ip_ptr;
+	ppp_private_area_t *ppp_priv_area = dev->priv;
+
+	/* Prepare PPP configuration structure */
+	memset(&cfg, 0, sizeof(ppp508_conf_t));
+
+	if (card->wandev.clocking)
+		cfg.line_speed = card->wandev.bps;
+
+	if (card->wandev.interface == WANOPT_RS232)
+		cfg.conf_flags |= INTERFACE_LEVEL_RS232;
+
+
+        cfg.conf_flags 	|= DONT_TERMINATE_LNK_MAX_CONFIG; /*send Configure-Request packets forever*/
+	cfg.txbuf_percent	= PERCENT_TX_BUFF;	/* % of Tx bufs */
+	cfg.mtu_local		= card->wandev.mtu;
+	cfg.mtu_remote		= card->wandev.mtu;                  /*    Default   */
+	cfg.restart_tmr		= TIME_BETWEEN_CONF_REQ;  	     /*    30 = 3sec */
+	cfg.auth_rsrt_tmr	= TIME_BETWEEN_PAP_CHAP_REQ;         /*    30 = 3sec */
+	cfg.auth_wait_tmr	= WAIT_PAP_CHAP_WITHOUT_REPLY;       /*   300 = 30s  */
+	cfg.mdm_fail_tmr	= WAIT_AFTER_DCD_CTS_LOW;            /*     5 = 0.5s */
+	cfg.dtr_drop_tmr	= TIME_DCD_CTS_LOW_AFTER_LNK_DOWN;   /*    10 = 1s   */
+	cfg.connect_tmout	= WAIT_DCD_HIGH_AFTER_ENABLE_COMM;   /*   900 = 90s  */
+	cfg.conf_retry		= MAX_CONF_REQ_WITHOUT_REPLY;        /*    10 = 1s   */
+	cfg.term_retry		= MAX_TERM_REQ_WITHOUT_REPLY;	     /*     2 times  */
+	cfg.fail_retry		= NUM_CONF_NAK_WITHOUT_REPLY;        /*     5 times  */
+	cfg.auth_retry		= NUM_AUTH_REQ_WITHOUT_REPLY;        /*     10 times */   
+
+
+	if( !card->u.p.authenticator ) {
+		printk(KERN_INFO "%s: Device is not configured as an authenticator\n", 
+				card->devname);
+		cfg.auth_options = NO_AUTHENTICATION;
+	}else{
+		printk(KERN_INFO "%s: Device is configured as an authenticator\n", 
+				card->devname);
+		cfg.auth_options = INBOUND_AUTH;
+	}
+
+	if( ppp_priv_area->pap == WANOPT_YES){
+		cfg.auth_options |=PAP_AUTH;
+		printk(KERN_INFO "%s: Pap enabled\n", card->devname);
+	}
+	if( ppp_priv_area->chap == WANOPT_YES){
+		cfg.auth_options |= CHAP_AUTH;
+		printk(KERN_INFO "%s: Chap enabled\n", card->devname);
+	}
+
+
+	if (ppp_priv_area->enable_IPX == WANOPT_YES){
+		printk(KERN_INFO "%s: Enabling IPX Protocol\n",card->devname);
+		cfg.ipx_options		= ENABLE_IPX | ROUTING_PROT_DEFAULT;
+	}else{
+		cfg.ipx_options 	= DISABLE_IPX;
+	}
+
+	switch (card->u.p.ip_mode) {
+	
+		case WANOPT_PPP_STATIC:
+
+			printk(KERN_INFO "%s: PPP IP Mode: STATIC\n",card->devname);
+			cfg.ip_options		= L_AND_R_IP_NO_ASSIG | 
+							    ENABLE_IP;
+			cfg.ip_local		= in_dev->ifa_list->ifa_local;
+			cfg.ip_remote		= in_dev->ifa_list->ifa_address;
+			/* Debugging code used to check that IP addresses
+                         * obtained from the kernel are correct */
+
+                        NEX_PRINTK(KERN_INFO "Local %u.%u.%u.%u Remote %u.%u.%u.%u Name %s\n",
+					NIPQUAD(ip_local),NIPQUAD(ip_remote), dev->name);
+			break;
+
+		case WANOPT_PPP_HOST:
+
+			printk(KERN_INFO "%s: PPP IP Mode: HOST\n",card->devname);
+			cfg.ip_options		= L_IP_LOCAL_ASSIG |
+						  R_IP_LOCAL_ASSIG | 
+						  ENABLE_IP;
+			cfg.ip_local		= in_dev->ifa_list->ifa_local;
+			cfg.ip_remote		= in_dev->ifa_list->ifa_address;
+			/* Debugging code used to check that IP addresses
+                         * obtained from the kernel are correct */
+                        NEX_PRINTK (KERN_INFO "Local %u.%u.%u.%u Remote %u.%u.%u.%u Name %s\n",
+					NIPQUAD(ip_local),NIPQUAD(ip_remote), dev->name);
+			
+			break;
+	
+		case WANOPT_PPP_PEER:
+
+			printk(KERN_INFO "%s: PPP IP Mode: PEER\n",card->devname);
+			cfg.ip_options		= L_IP_REMOTE_ASSIG | 
+						  R_IP_REMOTE_ASSIG | 
+							  ENABLE_IP;
+			cfg.ip_local		= 0x00;
+			cfg.ip_remote		= 0x00;
+			break;
+
+		default:
+			printk(KERN_INFO "%s: ERROR: Unsupported PPP Mode Selected\n",
+					card->devname);
+			printk(KERN_INFO "%s:        PPP IP Modes: STATIC, PEER or HOST\n",
+					card->devname);	
+			return 1;
+	}
+
+	return ppp_configure(card, &cfg);
+}
+
+/*============================================================================
+ * Show disconnection cause.
+ */
+static void show_disc_cause(sdla_t *card, unsigned cause)
+{
+	if (cause & 0x0802) 
+
+		printk(KERN_INFO "%s: link terminated by peer\n", 
+			card->devname);
+
+	else if (cause & 0x0004) 
+
+		printk(KERN_INFO "%s: link terminated by user\n", 
+			card->devname);
+
+	else if (cause & 0x0008) 
+
+		printk(KERN_INFO "%s: authentication failed\n", card->devname);
+	
+	else if (cause & 0x0010) 
+
+		printk(KERN_INFO 
+			"%s: authentication protocol negotiation failed\n", 
+			card->devname);
+
+	else if (cause & 0x0020) 
+		
+		printk(KERN_INFO
+		"%s: peer's request for authentication rejected\n",
+		card->devname);
+
+	else if (cause & 0x0040) 
+	
+		printk(KERN_INFO "%s: MRU option rejected by peer\n", 
+		card->devname);
+
+	else if (cause & 0x0080) 
+	
+		printk(KERN_INFO "%s: peer's MRU was too small\n", 
+		card->devname);
+
+	else if (cause & 0x0100) 
+
+		printk(KERN_INFO "%s: failed to negotiate peer's LCP options\n",
+		card->devname);
+
+	else if (cause & 0x0200) 
+		
+		printk(KERN_INFO "%s: failed to negotiate peer's IPCP options\n"
+		, card->devname);
+
+	else if (cause & 0x0400) 
+
+		printk(KERN_INFO 
+			"%s: failed to negotiate peer's IPXCP options\n",
+			card->devname);
+}
+
+/*=============================================================================
+ * Process UDP call of type PTPIPEAB.
+ */
+static void process_udp_mgmt_pkt(sdla_t *card, struct net_device *dev, 
+				 ppp_private_area_t *ppp_priv_area ) 
+{
+	unsigned char buf2[5];
+	unsigned char *buf;
+	unsigned int frames, len;
+	struct sk_buff *new_skb;
+	unsigned short data_length, buffer_length, real_len;
+	unsigned long data_ptr;
+	int udp_mgmt_req_valid = 1;
+	ppp_mbox_t *mbox = card->mbox;
+	struct timeval tv;
+	int err;
+	ppp_udp_pkt_t *ppp_udp_pkt = (ppp_udp_pkt_t*)&ppp_priv_area->udp_pkt_data;
+
+	memcpy(&buf2, &card->wandev.udp_port, 2 );
+
+
+	if(ppp_priv_area->udp_pkt_src == UDP_PKT_FRM_NETWORK) {
+
+		switch(ppp_udp_pkt->cblock.command) {
+
+			case PPIPE_GET_IBA_DATA:
+			case PPP_READ_CONFIG:
+			case PPP_GET_CONNECTION_INFO:
+			case PPIPE_ROUTER_UP_TIME:
+			case PPP_READ_STATISTICS:
+			case PPP_READ_ERROR_STATS:
+			case PPP_READ_PACKET_STATS:
+			case PPP_READ_LCP_STATS:
+			case PPP_READ_IPCP_STATS:
+			case PPP_READ_IPXCP_STATS:
+			case PPP_READ_PAP_STATS:
+			case PPP_READ_CHAP_STATS:
+			case PPP_READ_CODE_VERSION:
+				udp_mgmt_req_valid = 1;
+				break;
+			   
+			default:
+				udp_mgmt_req_valid = 0;
+				break;
+		} 
+	}
+	
+  	if(!udp_mgmt_req_valid) {
+	    
+		/* set length to 0 */
+    		ppp_udp_pkt->cblock.length = 0x00;
+
+    		/* set return code */
+    		ppp_udp_pkt->cblock.result = 0xCD; 
+		++ppp_priv_area->pipe_mgmt_stat.UDP_PIPE_mgmt_direction_err;
+	
+		if (net_ratelimit()){	
+			printk(KERN_INFO 
+			"%s: Warning, Illegal UDP command attempted from network: %x\n",
+			card->devname,ppp_udp_pkt->cblock.command);
+		}
+   	} else {
+		/* Initialize the trace element */
+		trace_element_t trace_element;		    
+
+		switch (ppp_udp_pkt->cblock.command){
+
+		/* PPIPE_ENABLE_TRACING */
+    		case PPIPE_ENABLE_TRACING:
+			if (!card->TracingEnabled) {
+    			
+				/* OPERATE_DATALINE_MONITOR */
+    				mbox->cmd.command = PPP_DATALINE_MONITOR;
+    				mbox->cmd.length = 0x01;
+    				mbox->data[0] = ppp_udp_pkt->data[0];
+	    			err = sdla_exec(mbox) ? 
+					mbox->cmd.result : CMD_TIMEOUT;
+	   
+				if (err != CMD_OK) { 
+	        			
+					ppp_error(card, err, mbox);
+	        			card->TracingEnabled = 0;
+	        		
+					/* set the return code */
+
+		        		ppp_udp_pkt->cblock.result = mbox->cmd.result;
+	        			mbox->cmd.length = 0;
+	        			break;
+	    			} 
+
+				sdla_peek(&card->hw, 0xC000, &buf2, 2);
+		    
+				ppp_priv_area->curr_trace_addr = 0;
+		    		memcpy(&ppp_priv_area->curr_trace_addr, &buf2, 2);
+		    		ppp_priv_area->start_trace_addr = 
+						ppp_priv_area->curr_trace_addr;
+				ppp_priv_area->end_trace_addr = 
+					ppp_priv_area->start_trace_addr + END_OFFSET;
+		    	
+				/* MAX_SEND_BUFFER_SIZE - 28 (IP header) 
+				   - 32 (ppipemon CBLOCK) */
+		    		available_buffer_space = MAX_LGTH_UDP_MGNT_PKT - 
+							 sizeof(ip_pkt_t)-
+							 sizeof(udp_pkt_t)-
+							 sizeof(wp_mgmt_t)-
+							 sizeof(cblock_t);
+	       	  	}
+	       	  	ppp_udp_pkt->cblock.result = 0;
+	       	  	mbox->cmd.length = 0;
+	       	  	card->TracingEnabled = 1;
+	       	  	break;
+	   
+		/* PPIPE_DISABLE_TRACING */
+		case PPIPE_DISABLE_TRACING:
+	      		
+			if(card->TracingEnabled) {
+		   	
+				/* OPERATE_DATALINE_MONITOR */
+		    		mbox->cmd.command = 0x33;
+		    		mbox->cmd.length = 1;
+		    		mbox->data[0] = 0x00;
+		    		err = sdla_exec(mbox) ? 
+					mbox->cmd.result : CMD_TIMEOUT;
+	       	  
+			} 
+		
+			/*set return code*/
+			ppp_udp_pkt->cblock.result = 0;
+			mbox->cmd.length = 0;
+			card->TracingEnabled = 0;
+			break;
+	   
+		/* PPIPE_GET_TRACE_INFO */
+		case PPIPE_GET_TRACE_INFO:
+
+			if(!card->TracingEnabled) {
+				/* set return code */
+	    			ppp_udp_pkt->cblock.result = 1;
+	    			mbox->cmd.length = 0;
+			}		    
+
+			buffer_length = 0;
+			
+			/* frames < 62, where 62 is the number of trace
+			   information elements.  There is in total 496
+			   bytes of space and each trace information
+			   element is 8 bytes. 
+			 */
+			for ( frames=0; frames<62; frames++) {
+	
+				trace_pkt_t *trace_pkt = (trace_pkt_t *)
+					&ppp_udp_pkt->data[buffer_length];
+	
+				/* Read the whole trace packet */
+				sdla_peek(&card->hw, ppp_priv_area->curr_trace_addr, 
+					  &trace_element, sizeof(trace_element_t));
+	
+				/* no data on board so exit */
+				if( trace_element.opp_flag == 0x00 ) 
+					break;
+	      
+				data_ptr = trace_element.trace_data_ptr;
+
+				/* See if there is actual data on the trace buffer */
+				if (data_ptr){
+					data_length = trace_element.trace_length;
+				}else{
+					data_length = 0;
+					ppp_udp_pkt->data[0] |= 0x02;
+				}
+
+				//FIXME: Do we need this check
+				if ((available_buffer_space - buffer_length) 
+				     < (sizeof(trace_element_t)+1)){
+					
+					/*indicate we have more frames 
+					 * on board and exit 
+					 */
+					ppp_udp_pkt->data[0] |= 0x02;
+					break;
+				}
+				
+				trace_pkt->status = trace_element.trace_type;
+				trace_pkt->time_stamp = trace_element.trace_time_stamp;
+				trace_pkt->real_length = trace_element.trace_length;
+
+				real_len = trace_element.trace_length;	
+				
+				if(data_ptr == 0){
+					trace_pkt->data_avail = 0x00;
+				}else{
+					/* we can take it next time */
+					if ((available_buffer_space - buffer_length)<
+						(real_len + sizeof(trace_pkt_t))){
+					
+						ppp_udp_pkt->data[0] |= 0x02;
+						break;
+					} 
+					trace_pkt->data_avail = 0x01;
+				
+					/* get the data */
+					sdla_peek(&card->hw, data_ptr, 
+						  &trace_pkt->data,
+						  real_len);
+				}	
+				/* zero the opp flag to 
+				   show we got the frame */
+				buf2[0] = 0x00;
+				sdla_poke(&card->hw, ppp_priv_area->curr_trace_addr,
+					  &buf2, 1);
+
+				/* now move onto the next 
+				   frame */
+				ppp_priv_area->curr_trace_addr += 8;
+
+				/* check if we passed the last address */
+				if ( ppp_priv_area->curr_trace_addr >= 
+					ppp_priv_area->end_trace_addr){
+
+					ppp_priv_area->curr_trace_addr = 
+						ppp_priv_area->start_trace_addr;
+				}
+ 
+				/* update buffer length and make sure its even */ 
+
+				if ( trace_pkt->data_avail == 0x01 ) {
+					buffer_length += real_len - 1;
+				}
+ 
+				/* for the header */
+				buffer_length += 8;
+
+				if( buffer_length & 0x0001 )
+					buffer_length += 1;
+			}
+
+			/* ok now set the total number of frames passed
+			   in the high 5 bits */
+			ppp_udp_pkt->data[0] |= (frames << 2);
+	 
+			/* set the data length */
+			mbox->cmd.length = buffer_length;
+			ppp_udp_pkt->cblock.length = buffer_length;
+	 
+			/* set return code */
+			ppp_udp_pkt->cblock.result = 0;
+	      	  	break;
+
+   		/* PPIPE_GET_IBA_DATA */
+		case PPIPE_GET_IBA_DATA:
+	        
+			mbox->cmd.length = 0x09;
+		
+			sdla_peek(&card->hw, 0xF003, &ppp_udp_pkt->data, 
+					mbox->cmd.length);
+	        
+			/* set the length of the data */
+			ppp_udp_pkt->cblock.length = 0x09;
+
+			/* set return code */
+			ppp_udp_pkt->cblock.result = 0x00;
+			ppp_udp_pkt->cblock.result = 0;
+			break;
+
+		/* PPIPE_FT1_READ_STATUS */
+		case PPIPE_FT1_READ_STATUS:
+			sdla_peek(&card->hw, 0xF020, &ppp_udp_pkt->data[0], 2);
+			ppp_udp_pkt->cblock.length = mbox->cmd.length = 2;
+			ppp_udp_pkt->cblock.result = 0;
+			break;
+		
+		case PPIPE_FLUSH_DRIVER_STATS:   
+			init_ppp_priv_struct( ppp_priv_area );
+			init_global_statistics( card );
+			mbox->cmd.length = 0;
+			ppp_udp_pkt->cblock.result = 0;
+			break;
+
+		
+		case PPIPE_ROUTER_UP_TIME:
+
+			do_gettimeofday( &tv );
+			ppp_priv_area->router_up_time = tv.tv_sec - 
+					ppp_priv_area->router_start_time;
+			*(unsigned long *)&ppp_udp_pkt->data = ppp_priv_area->router_up_time;
+			mbox->cmd.length = 4;
+			ppp_udp_pkt->cblock.result = 0;
+			break;
+
+				/* PPIPE_DRIVER_STATISTICS */   
+		case PPIPE_DRIVER_STAT_IFSEND:
+			memcpy(&ppp_udp_pkt->data, &ppp_priv_area->if_send_stat, 
+				sizeof(if_send_stat_t));
+
+
+			ppp_udp_pkt->cblock.result = 0;
+			ppp_udp_pkt->cblock.length = sizeof(if_send_stat_t);
+			mbox->cmd.length = sizeof(if_send_stat_t);	
+			break;
+
+		case PPIPE_DRIVER_STAT_INTR:
+			memcpy(&ppp_udp_pkt->data, &card->statistics, 
+				sizeof(global_stats_t));
+
+			memcpy(&ppp_udp_pkt->data+sizeof(global_stats_t),
+				&ppp_priv_area->rx_intr_stat,
+				sizeof(rx_intr_stat_t));
+
+			ppp_udp_pkt->cblock.result = 0;
+			ppp_udp_pkt->cblock.length = sizeof(global_stats_t)+
+						     sizeof(rx_intr_stat_t);
+			mbox->cmd.length = ppp_udp_pkt->cblock.length;
+			break;
+
+		case PPIPE_DRIVER_STAT_GEN:
+			memcpy( &ppp_udp_pkt->data,
+				&ppp_priv_area->pipe_mgmt_stat,
+				sizeof(pipe_mgmt_stat_t));
+
+			memcpy(&ppp_udp_pkt->data+sizeof(pipe_mgmt_stat_t), 
+			       &card->statistics, sizeof(global_stats_t));
+
+			ppp_udp_pkt->cblock.result = 0;
+			ppp_udp_pkt->cblock.length = sizeof(global_stats_t)+
+						     sizeof(rx_intr_stat_t);
+			mbox->cmd.length = ppp_udp_pkt->cblock.length;
+			break;
+
+
+		/* FT1 MONITOR STATUS */
+   		case FT1_MONITOR_STATUS_CTRL:
+	
+			/* Enable FT1 MONITOR STATUS */
+	        	if( ppp_udp_pkt->data[0] == 1) {
+			
+				if( rCount++ != 0 ) {
+		        		ppp_udp_pkt->cblock.result = 0;
+	          			mbox->cmd.length = 1;
+		  			break;
+		    		}	
+	      		}
+
+	      		/* Disable FT1 MONITOR STATUS */
+	      		if( ppp_udp_pkt->data[0] == 0) {
+
+	      	   		if( --rCount != 0) {
+		  			ppp_udp_pkt->cblock.result = 0;
+		  			mbox->cmd.length = 1;
+		  			break;
+	   	    		} 
+	      		} 	
+			goto udp_dflt_cmd;
+			
+		/* WARNING: FIXME: This should be fixed.
+		 * The FT1 Status Ctrl doesn't have a break
+                 * statment.  Thus, no code must be inserted
+                 * HERE: between default and above case statement */
+
+		default:
+udp_dflt_cmd:
+	        
+			/* it's a board command */
+			mbox->cmd.command = ppp_udp_pkt->cblock.command;
+			mbox->cmd.length = ppp_udp_pkt->cblock.length;
+ 
+			if(mbox->cmd.length) {
+				memcpy(&mbox->data,(unsigned char *)ppp_udp_pkt->data,
+				       mbox->cmd.length);
+	      		} 
+	          
+			/* run the command on the board */
+			err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT;
+		
+			if (err != CMD_OK) {
+		
+		    		ppp_error(card, err, mbox);
+		    		++ppp_priv_area->pipe_mgmt_stat.
+					 UDP_PIPE_mgmt_adptr_cmnd_timeout;
+				break;
+			}
+	          
+		  	++ppp_priv_area->pipe_mgmt_stat.UDP_PIPE_mgmt_adptr_cmnd_OK;
+		
+			/* copy the result back to our buffer */
+			memcpy(&ppp_udp_pkt->cblock,mbox, sizeof(cblock_t));
+	          
+			if(mbox->cmd.length) {
+				memcpy(&ppp_udp_pkt->data,&mbox->data,mbox->cmd.length);
+			} 
+
+		} /* end of switch */
+     	} /* end of else */
+
+     	/* Fill UDP TTL */
+     	ppp_udp_pkt->ip_pkt.ttl = card->wandev.ttl; 
+     	len = reply_udp(ppp_priv_area->udp_pkt_data, mbox->cmd.length);
+
+     	if (ppp_priv_area->udp_pkt_src == UDP_PKT_FRM_NETWORK) {
+
+		/* Make sure we are not already sending */
+		if (!test_bit(SEND_CRIT,&card->wandev.critical)){
+			++ppp_priv_area->pipe_mgmt_stat.UDP_PIPE_mgmt_passed_to_adptr;
+			ppp_send(card,ppp_priv_area->udp_pkt_data,len,ppp_priv_area->protocol);
+		}
+
+	} else {	
+	
+		/* Pass it up the stack
+    		   Allocate socket buffer */
+		if ((new_skb = dev_alloc_skb(len)) != NULL) {
+	    	
+			/* copy data into new_skb */
+
+  	    		buf = skb_put(new_skb, len);
+  	    		memcpy(buf,ppp_priv_area->udp_pkt_data, len);
+
+	    		++ppp_priv_area->pipe_mgmt_stat.UDP_PIPE_mgmt_passed_to_stack;
+			
+            		/* Decapsulate packet and pass it up the protocol 
+			   stack */
+	    		new_skb->protocol = htons(ETH_P_IP);
+            		new_skb->dev = dev;
+	    		new_skb->mac.raw  = new_skb->data;
+			netif_rx(new_skb);
+			dev->last_rx = jiffies;
+		
+		} else {
+	    	
+			++ppp_priv_area->pipe_mgmt_stat.UDP_PIPE_mgmt_no_socket;
+			printk(KERN_INFO "no socket buffers available!\n");
+  		}
+    	}	
+
+	ppp_priv_area->udp_pkt_lgth = 0;
+	
+	return; 
+}
+
+/*=============================================================================
+ * Initial the ppp_private_area structure.
+ */
+static void init_ppp_priv_struct( ppp_private_area_t *ppp_priv_area )
+{
+
+	memset(&ppp_priv_area->if_send_stat, 0, sizeof(if_send_stat_t));
+	memset(&ppp_priv_area->rx_intr_stat, 0, sizeof(rx_intr_stat_t));
+	memset(&ppp_priv_area->pipe_mgmt_stat, 0, sizeof(pipe_mgmt_stat_t));	
+}
+
+/*============================================================================
+ * Initialize Global Statistics
+ */
+static void init_global_statistics( sdla_t *card )
+{
+	memset(&card->statistics, 0, sizeof(global_stats_t));
+}
+
+/*============================================================================
+ * Initialize Receive and Transmit Buffers.
+ */
+static void init_ppp_tx_rx_buff( sdla_t *card )
+{
+	ppp508_buf_info_t* info;
+
+	if (card->hw.type == SDLA_S514) {
+		
+		info = (void*)(card->hw.dpmbase + PPP514_BUF_OFFS);
+
+       		card->u.p.txbuf_base = (void*)(card->hw.dpmbase +
+			info->txb_ptr);
+
+                card->u.p.txbuf_last = (ppp_buf_ctl_t*)card->u.p.txbuf_base +
+                        (info->txb_num - 1);
+
+                card->u.p.rxbuf_base = (void*)(card->hw.dpmbase +
+                        info->rxb_ptr);
+
+                card->u.p.rxbuf_last = (ppp_buf_ctl_t*)card->u.p.rxbuf_base +
+                        (info->rxb_num - 1);
+
+	} else {
+		
+		info = (void*)(card->hw.dpmbase + PPP508_BUF_OFFS);
+
+		card->u.p.txbuf_base = (void*)(card->hw.dpmbase +
+			(info->txb_ptr - PPP508_MB_VECT));
+
+		card->u.p.txbuf_last = (ppp_buf_ctl_t*)card->u.p.txbuf_base +
+			(info->txb_num - 1);
+
+		card->u.p.rxbuf_base = (void*)(card->hw.dpmbase +
+			(info->rxb_ptr - PPP508_MB_VECT));
+
+		card->u.p.rxbuf_last = (ppp_buf_ctl_t*)card->u.p.rxbuf_base +
+			(info->rxb_num - 1);
+	}
+
+	card->u.p.txbuf_next = (unsigned long*)&info->txb_nxt; 
+	card->u.p.rxbuf_next = (unsigned long*)&info->rxb1_ptr;
+
+	card->u.p.rx_base = info->rxb_base;
+        card->u.p.rx_top  = info->rxb_end;
+      
+	card->u.p.txbuf = card->u.p.txbuf_base;
+	card->rxmb = card->u.p.rxbuf_base;
+
+}
+
+/*=============================================================================
+ * Read Connection Information (ie for Remote IP address assginment).
+ * Called when ppp interface connected.
+ */
+static int read_info( sdla_t *card )
+{
+	struct net_device *dev = card->wandev.dev;
+	ppp_private_area_t *ppp_priv_area = dev->priv;
+	int err;
+
+	struct ifreq if_info;
+	struct sockaddr_in *if_data1, *if_data2;
+	mm_segment_t fs;
+
+	/* Set Local and remote addresses */
+	memset(&if_info, 0, sizeof(if_info));
+	strcpy(if_info.ifr_name, dev->name);
+
+
+	fs = get_fs();
+	set_fs(get_ds());     /* get user space block */ 
+
+	/* Change the local and remote ip address of the interface.
+	 * This will also add in the destination route.
+	 */	
+	if_data1 = (struct sockaddr_in *)&if_info.ifr_addr;
+	if_data1->sin_addr.s_addr = ppp_priv_area->ip_local;
+	if_data1->sin_family = AF_INET;
+	err = devinet_ioctl( SIOCSIFADDR, &if_info );
+	if_data2 = (struct sockaddr_in *)&if_info.ifr_dstaddr;
+	if_data2->sin_addr.s_addr = ppp_priv_area->ip_remote;
+	if_data2->sin_family = AF_INET;
+	err = devinet_ioctl( SIOCSIFDSTADDR, &if_info );
+
+	set_fs(fs);           /* restore old block */
+	
+	if (err) {
+		printk (KERN_INFO "%s: Adding of route failed: %i\n",
+			card->devname,err);
+		printk (KERN_INFO "%s:	Local : %u.%u.%u.%u\n",
+			card->devname,NIPQUAD(ppp_priv_area->ip_local));
+		printk (KERN_INFO "%s:	Remote: %u.%u.%u.%u\n",
+			card->devname,NIPQUAD(ppp_priv_area->ip_remote));
+	}
+	return err;
+}
+
+/*=============================================================================
+ * Remove Dynamic Route.
+ * Called when ppp interface disconnected.
+ */
+
+static void remove_route( sdla_t *card )
+{
+
+	struct net_device *dev = card->wandev.dev;
+	long ip_addr;
+	int err;
+
+        mm_segment_t fs;
+	struct ifreq if_info;
+	struct sockaddr_in *if_data1;
+        struct in_device *in_dev = dev->ip_ptr;
+        struct in_ifaddr *ifa = in_dev->ifa_list;	
+
+	ip_addr = ifa->ifa_local;
+
+	/* Set Local and remote addresses */
+	memset(&if_info, 0, sizeof(if_info));
+	strcpy(if_info.ifr_name, dev->name);
+
+	fs = get_fs();
+       	set_fs(get_ds());     /* get user space block */ 
+
+	/* Change the local ip address of the interface to 0.
+	 * This will also delete the destination route.
+	 */	
+	if_data1 = (struct sockaddr_in *)&if_info.ifr_addr;
+	if_data1->sin_addr.s_addr = 0;
+	if_data1->sin_family = AF_INET;
+	err = devinet_ioctl( SIOCSIFADDR, &if_info );
+
+        set_fs(fs);           /* restore old block */
+
+	
+	if (err) {
+		printk (KERN_INFO "%s: Deleting dynamic route failed %d!\n",
+			 card->devname, err);
+		return;
+	}else{
+		printk (KERN_INFO "%s: PPP Deleting dynamic route %u.%u.%u.%u successfuly\n",
+			card->devname, NIPQUAD(ip_addr));
+	}
+	return;
+}
+
+/*=============================================================================
+ * Perform the Interrupt Test by running the READ_CODE_VERSION command MAX_INTR
+ * _TEST_COUNTER times.
+ */
+static int intr_test( sdla_t *card )
+{
+	ppp_mbox_t *mb = card->mbox;
+	int err,i;
+
+	err = ppp_set_intr_mode( card, 0x08 );
+	
+	if (err == CMD_OK) { 
+		
+		for (i = 0; i < MAX_INTR_TEST_COUNTER; i ++) {	
+			/* Run command READ_CODE_VERSION */
+			memset(&mb->cmd, 0, sizeof(ppp_cmd_t));
+			mb->cmd.length  = 0;
+			mb->cmd.command = PPP_READ_CODE_VERSION;
+			err = sdla_exec(mb) ? mb->cmd.result : CMD_TIMEOUT;
+			if (err != CMD_OK) 
+				ppp_error(card, err, mb);
+		}
+	}
+	else return err;
+
+	err = ppp_set_intr_mode( card, 0 );
+	if (err != CMD_OK) 
+		return err;
+
+	return 0;
+}
+
+/*==============================================================================
+ * Determine what type of UDP call it is. DRVSTATS or PTPIPEAB ?
+ */
+static int udp_pkt_type( struct sk_buff *skb, sdla_t *card )
+{
+	unsigned char *sendpacket;
+	unsigned char buf2[5]; 
+	ppp_udp_pkt_t *ppp_udp_pkt = (ppp_udp_pkt_t *)skb->data; 
+	
+	sendpacket = skb->data;
+	memcpy(&buf2, &card->wandev.udp_port, 2);
+	
+	if( 	ppp_udp_pkt->ip_pkt.ver_inet_hdr_length  == 0x45 &&        /* IP packet */ 
+		sendpacket[9]  == 0x11 &&        /* UDP packet */
+		sendpacket[22] == buf2[1] &&     /* UDP Port */
+		sendpacket[23] == buf2[0] &&
+		sendpacket[36] == 0x01 ) {
+	
+		if (    sendpacket[28] == 0x50 &&    /* PTPIPEAB: Signature */ 
+			sendpacket[29] == 0x54 &&      
+			sendpacket[30] == 0x50 &&      
+			sendpacket[31] == 0x49 &&      
+			sendpacket[32] == 0x50 &&      
+			sendpacket[33] == 0x45 &&      
+			sendpacket[34] == 0x41 &&      
+			sendpacket[35] == 0x42 ){ 
+
+			return UDP_PTPIPE_TYPE;
+	
+		} else if(sendpacket[28] == 0x44 &&  /* DRVSTATS: Signature */
+			sendpacket[29] == 0x52 &&      
+      			sendpacket[30] == 0x56 &&      
+      			sendpacket[31] == 0x53 &&      
+      			sendpacket[32] == 0x54 &&      
+      			sendpacket[33] == 0x41 &&      
+      			sendpacket[34] == 0x54 &&      
+      			sendpacket[35] == 0x53 ){
+	
+			return UDP_DRVSTATS_TYPE;
+
+		} else
+			return UDP_INVALID_TYPE;
+
+	} else
+		return UDP_INVALID_TYPE;
+
+}
+
+/*============================================================================
+ * Check to see if the packet to be transmitted contains a broadcast or
+ * multicast source IP address.
+ */
+
+static int chk_bcast_mcast_addr(sdla_t *card, struct net_device* dev,
+				struct sk_buff *skb)
+{
+	u32 src_ip_addr;
+        u32 broadcast_ip_addr = 0;
+        struct in_device *in_dev;
+
+        /* read the IP source address from the outgoing packet */
+        src_ip_addr = *(u32 *)(skb->data + 12);
+
+	/* read the IP broadcast address for the device */
+        in_dev = dev->ip_ptr;
+        if(in_dev != NULL) {
+                struct in_ifaddr *ifa= in_dev->ifa_list;
+                if(ifa != NULL)
+                        broadcast_ip_addr = ifa->ifa_broadcast;
+                else
+                        return 0;
+        }
+ 
+        /* check if the IP Source Address is a Broadcast address */
+        if((dev->flags & IFF_BROADCAST) && (src_ip_addr == broadcast_ip_addr)) {
+                printk(KERN_INFO "%s: Broadcast Source Address silently discarded\n",
+				card->devname);
+                return 1;
+        } 
+
+        /* check if the IP Source Address is a Multicast address */
+        if((ntohl(src_ip_addr) >= 0xE0000001) &&
+		(ntohl(src_ip_addr) <= 0xFFFFFFFE)) {
+                printk(KERN_INFO "%s: Multicast Source Address silently discarded\n",
+				card->devname);
+                return 1;
+        }
+
+        return 0;
+}
+
+void s508_lock (sdla_t *card, unsigned long *smp_flags)
+{
+	spin_lock_irqsave(&card->wandev.lock, *smp_flags);
+}
+
+void s508_unlock (sdla_t *card, unsigned long *smp_flags)
+{
+        spin_unlock_irqrestore(&card->wandev.lock, *smp_flags);
+}
+
+static int read_connection_info (sdla_t *card)
+{
+	ppp_mbox_t *mb = card->mbox;
+	struct net_device *dev = card->wandev.dev;
+	ppp_private_area_t *ppp_priv_area = dev->priv;
+	ppp508_connect_info_t *ppp508_connect_info;
+	int err;
+
+	memset(&mb->cmd, 0, sizeof(ppp_cmd_t));
+	mb->cmd.length  = 0;
+	mb->cmd.command = PPP_GET_CONNECTION_INFO;
+	err = sdla_exec(mb) ? mb->cmd.result : CMD_TIMEOUT;
+
+	if (err != CMD_OK) { 
+		ppp_error(card, err, mb);
+		ppp_priv_area->ip_remote = 0;
+		ppp_priv_area->ip_local = 0;
+	}
+	else {
+		ppp508_connect_info = (ppp508_connect_info_t *)mb->data;
+		ppp_priv_area->ip_remote = ppp508_connect_info->ip_remote;
+		ppp_priv_area->ip_local = ppp508_connect_info->ip_local;
+
+		NEX_PRINTK(KERN_INFO "READ CONNECTION GOT IP ADDRESS %x, %x\n",
+				ppp_priv_area->ip_remote,
+				ppp_priv_area->ip_local);
+	}
+
+	return err;
+}
+
+/*===============================================================================
+ * config_ppp
+ *
+ *	Configure the ppp protocol and enable communications.		
+ *
+ *   	The if_open function binds this function to the poll routine.
+ *      Therefore, this function will run every time the ppp interface
+ *      is brought up.  
+ *      
+ *	If the communications are not enabled, proceed to configure
+ *      the card and enable communications.
+ *
+ *      If the communications are enabled, it means that the interface
+ *      was shutdown by ether the user or driver. In this case, we 
+ *      have to check that the IP addresses have not changed.  If
+ *      the IP addresses changed, we have to reconfigure the firmware
+ *      and update the changed IP addresses.  Otherwise, just exit.
+ */
+static int config_ppp (sdla_t *card)
+{
+
+	struct net_device *dev = card->wandev.dev;
+	ppp_flags_t *flags = card->flags;
+	ppp_private_area_t *ppp_priv_area = dev->priv;
+
+	if (card->u.p.comm_enabled){
+
+		if (ppp_priv_area->ip_local_tmp != ppp_priv_area->ip_local ||
+		    ppp_priv_area->ip_remote_tmp != ppp_priv_area->ip_remote){
+			
+			/* The IP addersses have changed, we must
+                         * stop the communications and reconfigure
+                         * the card. Reason: the firmware must know
+                         * the local and remote IP addresses. */
+			disable_comm(card);
+			wanpipe_set_state(card, WAN_DISCONNECTED);
+			printk(KERN_INFO 
+				"%s: IP addresses changed!\n",
+					card->devname);
+			printk(KERN_INFO "%s: Restarting communications ...\n",
+					card->devname);
+		}else{ 
+			/* IP addresses are the same and the link is up, 
+                         * we don't have to do anything here. Therefore, exit */
+			return 0;
+		}
+	}
+
+	/* Record the new IP addreses */
+	ppp_priv_area->ip_local = ppp_priv_area->ip_local_tmp;
+	ppp_priv_area->ip_remote = ppp_priv_area->ip_remote_tmp;
+
+	if (config508(dev, card)){
+		printk(KERN_INFO "%s: Failed to configure PPP device\n",
+			card->devname);
+		return 0;
+	}
+
+	if (ppp_set_intr_mode(card, PPP_INTR_RXRDY|
+			    		PPP_INTR_TXRDY|
+				    	PPP_INTR_MODEM|
+				    	PPP_INTR_DISC |
+				    	PPP_INTR_OPEN |
+				    	PPP_INTR_DROP_DTR |
+					PPP_INTR_TIMER)) {
+
+		printk(KERN_INFO "%s: Failed to configure board interrupts !\n", 
+			card->devname);
+		return 0;
+	}
+
+        /* Turn off the transmit and timer interrupt */
+	flags->imask &= ~(PPP_INTR_TXRDY | PPP_INTR_TIMER) ;
+
+
+	/* If you are not the authenticator and any one of the protocol is 
+	 * enabled then we call the set_out_bound_authentication.
+	 */
+	if ( !card->u.p.authenticator  && (ppp_priv_area->pap || ppp_priv_area->chap)) {
+		if ( ppp_set_outbnd_auth(card, ppp_priv_area) ){
+			printk(KERN_INFO "%s: Outbound authentication failed !\n",
+				card->devname);
+			return 0;
+		}
+	} 
+	
+	/* If you are the authenticator and any one of the protocol is enabled
+	 * then we call the set_in_bound_authentication.
+	 */
+	if (card->u.p.authenticator && (ppp_priv_area->pap || ppp_priv_area->chap)){
+		if (ppp_set_inbnd_auth(card, ppp_priv_area)){
+			printk(KERN_INFO "%s: Inbound authentication failed !\n",
+				card->devname);	
+			return 0;
+		}
+	}
+
+	/* If we fail to enable communications here it's OK,
+	 * since the DTR timer will cause a disconnected, which
+	 * will retrigger communication in timer_intr() */
+	if (ppp_comm_enable(card) == CMD_OK) {
+		wanpipe_set_state(card, WAN_CONNECTING);
+		init_ppp_tx_rx_buff(card);
+	}
+
+	return 0; 
+}
+
+/*============================================================
+ * ppp_poll
+ *	
+ * Rationale:
+ * 	We cannot manipulate the routing tables, or
+ *      ip addresses withing the interrupt. Therefore
+ *      we must perform such actons outside an interrupt 
+ *      at a later time. 
+ *
+ * Description:	
+ *	PPP polling routine, responsible for 
+ *     	shutting down interfaces upon disconnect
+ *     	and adding/removing routes. 
+ *      
+ * Usage:        
+ * 	This function is executed for each ppp  
+ * 	interface through a tq_schedule bottom half.
+ *      
+ *      trigger_ppp_poll() function is used to kick
+ *      the ppp_poll routine.  
+ */
+static void ppp_poll(struct net_device *dev)
+{
+	ppp_private_area_t *ppp_priv_area; 	
+	sdla_t *card;
+	u8 check_gateway=0;
+	ppp_flags_t *flags;
+
+	if (!dev || (ppp_priv_area = dev->priv) == NULL)
+		return;
+
+	card = ppp_priv_area->card;
+	flags = card->flags;
+
+	/* Shutdown is in progress, stop what you are 
+	 * doing and get out */
+	if (test_bit(PERI_CRIT,&card->wandev.critical)){
+		clear_bit(POLL_CRIT,&card->wandev.critical);
+		return;
+	}
+
+	/* if_open() function has triggered the polling routine
+	 * to determine the configured IP addresses.  Once the
+	 * addresses are found, trigger the chdlc configuration */
+	if (test_bit(0,&ppp_priv_area->config_ppp)){
+
+		ppp_priv_area->ip_local_tmp  = get_ip_address(dev,WAN_LOCAL_IP);
+		ppp_priv_area->ip_remote_tmp = get_ip_address(dev,WAN_POINTOPOINT_IP);
+
+		if (ppp_priv_area->ip_local_tmp == ppp_priv_area->ip_remote_tmp && 
+	            card->u.p.ip_mode == WANOPT_PPP_HOST){
+			
+			if (++ppp_priv_area->ip_error > MAX_IP_ERRORS){
+				printk(KERN_INFO "\n%s: --- WARNING ---\n",
+						card->devname);
+				printk(KERN_INFO "%s: The local IP address is the same as the\n",
+						card->devname);
+				printk(KERN_INFO "%s: Point-to-Point IP address.\n",
+						card->devname);
+				printk(KERN_INFO "%s: --- WARNING ---\n\n",
+						card->devname);
+			}else{
+				clear_bit(POLL_CRIT,&card->wandev.critical);
+				ppp_priv_area->poll_delay_timer.expires = jiffies+HZ;
+				add_timer(&ppp_priv_area->poll_delay_timer);
+				return;
+			}
+		}
+
+		ppp_priv_area->timer_int_enabled |= TMR_INT_ENABLED_CONFIG;
+		flags->imask |= PPP_INTR_TIMER;	
+		ppp_priv_area->ip_error=0;	
+		
+		clear_bit(0,&ppp_priv_area->config_ppp);
+		clear_bit(POLL_CRIT,&card->wandev.critical);
+		return;
+	}
+
+	/* Dynamic interface implementation, as well as dynamic
+	 * routing.  */
+	
+	switch (card->wandev.state) {
+	
+	case WAN_DISCONNECTED:
+
+		/* If the dynamic interface configuration is on, and interface 
+		 * is up, then bring down the netowrk interface */
+
+		if (test_bit(DYN_OPT_ON,&ppp_priv_area->interface_down) &&
+		    !test_bit(DEV_DOWN,&ppp_priv_area->interface_down)	&&	
+		    card->wandev.dev->flags & IFF_UP){	
+
+			printk(KERN_INFO "%s: Interface %s down.\n",
+				card->devname,card->wandev.dev->name);
+			change_dev_flags(card->wandev.dev,
+					(card->wandev.dev->flags&~IFF_UP));
+			set_bit(DEV_DOWN,&ppp_priv_area->interface_down);
+		}else{
+			/* We need to check if the local IP address is
+               	   	 * zero. If it is, we shouldn't try to remove it.
+                 	 * For some reason the kernel crashes badly if 
+                 	 * we try to remove the route twice */
+
+			if (card->wandev.dev->flags & IFF_UP && 
+		    	    get_ip_address(card->wandev.dev,WAN_LOCAL_IP) &&
+		    	    card->u.p.ip_mode == WANOPT_PPP_PEER){
+
+				remove_route(card);
+			}
+		}
+		break;
+
+	case WAN_CONNECTED:
+		
+		/* In SMP machine this code can execute before the interface
+		 * comes up.  In this case, we must make sure that we do not
+		 * try to bring up the interface before dev_open() is finished */
+
+
+		/* DEV_DOWN will be set only when we bring down the interface
+		 * for the very first time. This way we know that it was us
+		 * that brought the interface down */
+		
+		if (test_bit(DYN_OPT_ON,&ppp_priv_area->interface_down) &&
+	            test_bit(DEV_DOWN,  &ppp_priv_area->interface_down) &&
+ 		    !(card->wandev.dev->flags & IFF_UP)){
+			
+			printk(KERN_INFO "%s: Interface %s up.\n",
+				card->devname,card->wandev.dev->name);
+			
+			change_dev_flags(card->wandev.dev,(card->wandev.dev->flags|IFF_UP));
+			clear_bit(DEV_DOWN,&ppp_priv_area->interface_down);
+			check_gateway=1;
+		}
+
+		if ((card->u.p.ip_mode == WANOPT_PPP_PEER) && 
+		    test_bit(1,&Read_connection_info)) { 
+			
+			process_route(card);
+			clear_bit(1,&Read_connection_info);
+			check_gateway=1;
+		}
+
+		if (ppp_priv_area->gateway && check_gateway)
+			add_gateway(card,dev);
+
+		break;
+	}
+	clear_bit(POLL_CRIT,&card->wandev.critical);
+	return;
+}
+
+/*============================================================
+ * trigger_ppp_poll
+ *
+ * Description:
+ * 	Add a ppp_poll() task into a tq_scheduler bh handler
+ *      for a specific interface.  This will kick
+ *      the ppp_poll() routine at a later time. 
+ *
+ * Usage:
+ * 	Interrupts use this to defer a taks to 
+ *      a polling routine.
+ *
+ */	
+
+static void trigger_ppp_poll(struct net_device *dev)
+{
+	ppp_private_area_t *ppp_priv_area;
+	if ((ppp_priv_area=dev->priv) != NULL){ 	
+		
+		sdla_t *card = ppp_priv_area->card;
+
+		if (test_bit(PERI_CRIT,&card->wandev.critical)){
+			return;
+		}
+		
+		if (test_and_set_bit(POLL_CRIT,&card->wandev.critical)){
+			return;
+		}
+
+		schedule_work(&ppp_priv_area->poll_work);
+	}
+	return;
+}
+
+static void ppp_poll_delay (unsigned long dev_ptr)
+{
+	struct net_device *dev = (struct net_device *)dev_ptr;
+	trigger_ppp_poll(dev);
+}
+
+/*============================================================
+ * detect_and_fix_tx_bug
+ *
+ * Description:
+ *	On connect, if the board tx buffer ptr is not the same
+ *      as the driver tx buffer ptr, we found a firmware bug.
+ *      Report the bug to the above layer.  To fix the
+ *      error restart communications again.
+ *
+ * Usage:
+ *
+ */	
+
+static int detect_and_fix_tx_bug (sdla_t *card)
+{
+	if (((unsigned long)card->u.p.txbuf_base&0xFFF) != ((*card->u.p.txbuf_next)&0xFFF)){
+		NEX_PRINTK(KERN_INFO "Major Error, Fix the bug\n");
+		return 1;
+	}
+	return 0;
+}
+
+MODULE_LICENSE("GPL");
+
+/****** End *****************************************************************/