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path: root/drivers/net/wan/sdla_ppp.c
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Diffstat (limited to 'drivers/net/wan/sdla_ppp.c')
-rw-r--r--drivers/net/wan/sdla_ppp.c3429
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 000000000000..1761cb68ab48
--- /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 *****************************************************************/