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sdla_chdlc.c：源码内容

/*****************************************************************************
* sdla_chdlc.c WANPIPE(tm) Multiprotocol WAN Link Driver. Cisco HDLC module.
*
* Authors: Nenad Corbic <ncorbic@sangoma.com>
* Gideon Hack
*
*
* 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 Updated if_tx_timeout() routine for
* 2.4.X kernels.
* Jan 25, 2001 Nenad Corbic Added a TTY Sync serial driver over the
* HDLC streaming protocol
* Added a TTY Async serial driver over the
* Async protocol.
* Dec 15, 2000 Nenad Corbic Updated for 2.4.X Kernel support
* Nov 13, 2000 Nenad Corbic Added true interface type encoding option.
* Tcpdump doesn't support CHDLC inteface
* types, to fix this "true type" option will set
* the interface type to RAW IP mode.
* Nov 07, 2000 Nenad Corbic Added security features for UDP debugging:
* Deny all and specify allowed requests.
* Jun 20, 2000 Nenad Corbic Fixed the API IP ERROR bug. Caused by the
* latest update.
* May 09, 2000 Nenad Corbic Option to bring down an interface
* upon disconnect.
* Mar 23, 2000 Nenad Corbic Improved task queue, bh handling.
* Mar 16, 2000 Nenad Corbic Fixed the SLARP Dynamic IP addressing.
* Mar 06, 2000 Nenad Corbic Bug Fix: corrupted mbox recovery.
* Feb 10, 2000 Gideon Hack Added ASYNC support.
* Feb 09, 2000 Nenad Corbic Fixed two shutdown bugs in update() and
* if_stats() functions.
* Jan 24, 2000 Nenad Corbic Fixed a startup wanpipe state racing,
* condition between if_open and isr.
* Jan 10, 2000 Nenad Corbic Added new socket API support.
* Dev 15, 1999 Nenad Corbic Fixed up header files for 2.0.X kernels
* Nov 20, 1999 Nenad Corbic Fixed zero length API bug.
* Sep 30, 1999 Nenad Corbic Fixed dynamic IP and route setup.
* Sep 23, 1999 Nenad Corbic Added SMP support, fixed tracing
* Sep 13, 1999 Nenad Corbic Split up Port 0 and 1 into separate devices.
* Jun 02, 1999 Gideon Hack Added support for the S514 adapter.
* Oct 30, 1998 Jaspreet Singh Added Support for CHDLC API (HDLC STREAMING).
* Oct 28, 1998 Jaspreet Singh Added Support for Dual Port CHDLC.
* Aug 07, 1998 David Fong Initial version.
*****************************************************************************/
#include <linux/module.h>
#include <linux/version.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 */
#if defined(LINUX_2_1) || defined(LINUX_2_4)
#include <asm/uaccess.h>
#include <linux/inetdevice.h>
#include <linux/netdevice.h>
#else
#include <asm/segment.h>
#include <net/route.h> /* Adding new route entries : 2.0.X kernels */
#endif
#include <linux/in.h> /* sockaddr_in */
#include <linux/inet.h>
#include <linux/if.h>
#include <asm/byteorder.h> /* htons(), etc. */
#include <linux/sdlapci.h>
#include <asm/io.h>
#include <linux/sdla_chdlc.h> /* CHDLC firmware API definitions */
#include <linux/sdla_asy.h> /* CHDLC (async) API definitions */
#include <linux/if_wanpipe_common.h> /* Socket Driver common area */
#include <linux/if_wanpipe.h>
/* TTY Includes */
#include <linux/tty.h>
#include <linux/tty_flip.h>
#include <linux/serial.h>
/****** Defines & Macros ****************************************************/
/* reasons for enabling the timer interrupt on the adapter */
#define TMR_INT_ENABLED_UDP 0x01
#define TMR_INT_ENABLED_UPDATE 0x02
#define TMR_INT_ENABLED_CONFIG 0x10
#define MAX_IP_ERRORS 10
#define TTY_CHDLC_MAX_MTU 2000
#define CHDLC_DFLT_DATA_LEN 1500 /* default MTU */
#define CHDLC_HDR_LEN 1
#define CHDLC_API 0x01
#define PORT(x) (x == 0 ? "PRIMARY" : "SECONDARY" )
#define MAX_BH_BUFF 10
//#define PRINT_DEBUG
#ifdef PRINT_DEBUG
#define dbg_printk(format, a...) printk(format, ## a)
#else
#define dbg_printk(format, a...)
#endif
/******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 CHDLC specific data
*/
typedef struct chdlc_private_area
{
wanpipe_common_t common;
sdla_t *card;
int TracingEnabled; /* For enabling Tracing */
unsigned long curr_trace_addr; /* Used for Tracing */
unsigned long start_trace_addr;
unsigned long end_trace_addr;
unsigned long base_addr_trace_buffer;
unsigned long end_addr_trace_buffer;
unsigned short number_trace_elements;
unsigned available_buffer_space;
unsigned long router_start_time;
unsigned char route_status;
unsigned char route_removed;
unsigned long tick_counter; /* For 5s timeout counter */
unsigned long router_up_time;
u32 IP_address; /* IP addressing */
u32 IP_netmask;
u32 ip_local;
u32 ip_remote;
u32 ip_local_tmp;
u32 ip_remote_tmp;
u8 ip_error;
u8 config_chdlc;
u8 config_chdlc_timeout;
unsigned char mc; /* Mulitcast support on/off */
unsigned short udp_pkt_lgth; /* udp packet processing */
char udp_pkt_src;
char udp_pkt_data[MAX_LGTH_UDP_MGNT_PKT];
unsigned short timer_int_enabled;
char update_comms_stats; /* updating comms stats */
#if defined(LINUX_2_1) || defined(LINUX_2_4)
bh_data_t *bh_head; /* Circular buffer for chdlc_bh */
unsigned long tq_working;
volatile int bh_write;
volatile int bh_read;
atomic_t bh_buff_used;
#endif
unsigned char interface_down;
/* Polling task queue. Each interface
* has its own task queue, which is used
* to defer events from the interrupt */
struct tq_struct poll_task;
struct timer_list poll_delay_timer;
u8 gateway;
u8 true_if_encoding;
//FIXME: add driver stats as per frame relay!
} chdlc_private_area_t;
/* Route Status options */
#define NO_ROUTE 0x00
#define ADD_ROUTE 0x01
#define ROUTE_ADDED 0x02
#define REMOVE_ROUTE 0x03
/* variable for keeping track of enabling/disabling FT1 monitor status */
static int rCount = 0;
/* variable for tracking how many interfaces to open for WANPIPE on the
two ports */
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 (wan_device_t* wandev);
static int new_if (wan_device_t* wandev, netdevice_t* dev,
wanif_conf_t* conf);
/* Network device interface */
static int if_init (netdevice_t* dev);
static int if_open (netdevice_t* dev);
static int if_close (netdevice_t* dev);
static int if_header (struct sk_buff* skb, netdevice_t* dev,
unsigned short type, void* daddr, void* saddr, unsigned len);
#if defined(LINUX_2_1) || defined(LINUX_2_4)
static int if_rebuild_hdr (struct sk_buff *skb);
static struct net_device_stats* if_stats (netdevice_t* dev);
#else
static int if_rebuild_hdr (void* hdr, netdevice_t* dev, unsigned long raddr,
struct sk_buff* skb);
static struct enet_statistics* if_stats (netdevice_t* dev);
#endif
static int if_send (struct sk_buff* skb, netdevice_t* dev);
/* CHDLC Firmware interface functions */
static int chdlc_configure (sdla_t* card, void* data);
static int chdlc_comm_enable (sdla_t* card);
static int chdlc_read_version (sdla_t* card, char* str);
static int chdlc_set_intr_mode (sdla_t* card, unsigned mode);
static int chdlc_send (sdla_t* card, void* data, unsigned len);
static int chdlc_read_comm_err_stats (sdla_t* card);
static int chdlc_read_op_stats (sdla_t* card);
static int chdlc_error (sdla_t *card, int err, CHDLC_MAILBOX_STRUCT *mb);
static int chdlc_disable_comm_shutdown (sdla_t *card);
#ifdef LINUX_2_4
static void if_tx_timeout (netdevice_t *dev);
#endif
/* Miscellaneous CHDLC Functions */
static int set_chdlc_config (sdla_t* card);
static void init_chdlc_tx_rx_buff( sdla_t* card);
static int process_chdlc_exception(sdla_t *card);
static int process_global_exception(sdla_t *card);
static int update_comms_stats(sdla_t* card,
chdlc_private_area_t* chdlc_priv_area);
static int configure_ip (sdla_t* card);
static int unconfigure_ip (sdla_t* card);
static void process_route(sdla_t *card);
static void port_set_state (sdla_t *card, int);
static int config_chdlc (sdla_t *card);
static void disable_comm (sdla_t *card);
static void trigger_chdlc_poll (netdevice_t *);
static void chdlc_poll (netdevice_t *);
static void chdlc_poll_delay (unsigned long dev_ptr);
/* Miscellaneous asynchronous interface Functions */
static int set_asy_config (sdla_t* card);
static int asy_comm_enable (sdla_t* card);
/* Interrupt handlers */
static void wpc_isr (sdla_t* card);
static void rx_intr (sdla_t* card);
static void timer_intr(sdla_t *);
#if defined(LINUX_2_1) || defined(LINUX_2_4)
/* Bottom half handlers */
static void chdlc_bh (netdevice_t *);
static int chdlc_bh_cleanup (netdevice_t *);
static int bh_enqueue (netdevice_t *, struct sk_buff *);
#endif
/* Miscellaneous functions */
static int chk_bcast_mcast_addr(sdla_t* card, netdevice_t* dev,
struct sk_buff *skb);
static int reply_udp( unsigned char *data, unsigned int mbox_len );
static int intr_test( sdla_t* card);
static int udp_pkt_type( struct sk_buff *skb , sdla_t* card);
static int store_udp_mgmt_pkt(char udp_pkt_src, sdla_t* card,
struct sk_buff *skb, netdevice_t* dev,
chdlc_private_area_t* chdlc_priv_area);
static int process_udp_mgmt_pkt(sdla_t* card, netdevice_t* dev,
chdlc_private_area_t* chdlc_priv_area);
static unsigned short calc_checksum (char *, int);
static void s508_lock (sdla_t *card, unsigned long *smp_flags);
static void s508_unlock (sdla_t *card, unsigned long *smp_flags);
static int Intr_test_counter;
/* TTY Global Definitions */
#if defined(LINUX_2_4) || defined(LINUX_2_1)
#define NR_PORTS 4
#define WAN_TTY_MAJOR 226
#define WAN_TTY_MINOR 0
#define WAN_CARD(port) (tty_card_map[port])
#define MIN_PORT 0
#define MAX_PORT NR_PORTS-1
#define CRC_LENGTH 2
static int wanpipe_tty_init(sdla_t *card);
static void wanpipe_tty_receive(sdla_t *, unsigned, unsigned int);
static void wanpipe_tty_trigger_poll(sdla_t *card);
static struct tty_driver serial_driver, callout_driver;
static int serial_refcount=1;
static int tty_init_cnt=0;
static struct serial_state rs_table[NR_PORTS];
static struct tty_struct *serial_table[NR_PORTS];
static struct termios *serial_termios[NR_PORTS];
static struct termios *serial_termios_locked[NR_PORTS];
static char tty_driver_mode=WANOPT_TTY_SYNC;
static char *opt_decode[] = {"NONE","CRTSCTS","XONXOFF-RX",
"CRTSCTS XONXOFF-RX","XONXOFF-TX",
"CRTSCTS XONXOFF-TX","CRTSCTS XONXOFF"};
static char *p_decode[] = {"NONE","ODD","EVEN"};
static void* tty_card_map[NR_PORTS] = {NULL,NULL,NULL,NULL};
#endif
/****** Public Functions ****************************************************/
/*============================================================================
* Cisco HDLC 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 wpc_init (sdla_t* card, wandev_conf_t* conf)
{
unsigned char port_num;
int err;
unsigned long max_permitted_baud = 0;
SHARED_MEMORY_INFO_STRUCT *flags;
union
{
char str[80];
} u;
volatile CHDLC_MAILBOX_STRUCT* mb;
CHDLC_MAILBOX_STRUCT* mb1;
unsigned long timeout;
/* Verify configuration ID */
if (conf->config_id != WANCONFIG_CHDLC) {
printk(KERN_INFO "%s: invalid configuration ID %u!n",
card->devname, conf->config_id);
return -EINVAL;
}
/* Find out which Port to use */
if ((conf->comm_port == WANOPT_PRI) || (conf->comm_port == WANOPT_SEC)){
if (card->next){
if (conf->comm_port != card->next->u.c.comm_port){
card->u.c.comm_port = conf->comm_port;
}else{
printk(KERN_INFO "%s: ERROR - %s port used!n",
card->wandev.name, PORT(conf->comm_port));
return -EINVAL;
}
}else{
card->u.c.comm_port = conf->comm_port;
}
}else{
printk(KERN_INFO "%s: ERROR - Invalid Port Selected!n",
card->wandev.name);
return -EINVAL;
}
/* Initialize protocol-specific fields */
if(card->hw.type != SDLA_S514){
if (card->u.c.comm_port == WANOPT_PRI){
card->mbox = (void *) card->hw.dpmbase;
}else{
card->mbox = (void *) card->hw.dpmbase +
SEC_BASE_ADDR_MB_STRUCT - PRI_BASE_ADDR_MB_STRUCT;
}
}else{
/* for a S514 adapter, set a pointer to the actual mailbox in the */
/* allocated virtual memory area */
if (card->u.c.comm_port == WANOPT_PRI){
card->mbox = (void *) card->hw.dpmbase + PRI_BASE_ADDR_MB_STRUCT;
}else{
card->mbox = (void *) card->hw.dpmbase + SEC_BASE_ADDR_MB_STRUCT;
}
}
mb = mb1 = card->mbox;
if (!card->configured){
/* The board will place an 'I' in the return code to indicate that it is
ready to accept commands. We expect this to be completed in less
than 1 second. */
timeout = jiffies;
while (mb->return_code != 'I') /* Wait 1s for board to initialize */
if ((jiffies - timeout) > 1*HZ) break;
if (mb->return_code != 'I') {
printk(KERN_INFO
"%s: Initialization not completed by adaptern",
card->devname);
printk(KERN_INFO "Please contact Sangoma representative.n");
return -EIO;
}
}
/* 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 (chdlc_read_version(card, u.str))
return -EIO;
printk(KERN_INFO "%s: Running Cisco HDLC firmware v%sn",
card->devname, u.str);
card->isr = &wpc_isr;
card->poll = NULL;
card->exec = NULL;
card->wandev.update = &update;
card->wandev.new_if = &new_if;
card->wandev.del_if = NULL;
card->wandev.udp_port = conf->udp_port;
card->disable_comm = &disable_comm;
card->wandev.new_if_cnt = 0;
/* reset the number of times the 'update()' proc has been called */
card->u.c.update_call_count = 0;
card->wandev.ttl = conf->ttl;
card->wandev.interface = conf->interface;
if ((card->u.c.comm_port == WANOPT_SEC && conf->interface == WANOPT_V35)&&
card->hw.type != SDLA_S514){
printk(KERN_INFO "%s: ERROR - V35 Interface not supported on S508 %s port n",
card->devname, PORT(card->u.c.comm_port));
return -EIO;
}
card->wandev.clocking = conf->clocking;
port_num = card->u.c.comm_port;
/* in API mode, we can configure for "receive only" buffering */
if(card->hw.type == SDLA_S514) {
card->u.c.receive_only = conf->receive_only;
if(conf->receive_only) {
printk(KERN_INFO
"%s: Configured for 'receive only' moden",
card->devname);
}
}
/* Setup Port Bps */
if(card->wandev.clocking) {
if((port_num == WANOPT_PRI) || card->u.c.receive_only) {
/* For Primary Port 0 */
max_permitted_baud =
(card->hw.type == SDLA_S514) ?
PRI_MAX_BAUD_RATE_S514 :
PRI_MAX_BAUD_RATE_S508;
}else if(port_num == WANOPT_SEC) {
/* For Secondary Port 1 */
max_permitted_baud =
(card->hw.type == SDLA_S514) ?
SEC_MAX_BAUD_RATE_S514 :
SEC_MAX_BAUD_RATE_S508;
}
if(conf->bps > max_permitted_baud) {
conf->bps = max_permitted_baud;
printk(KERN_INFO "%s: Baud too high!n",
card->wandev.name);
printk(KERN_INFO "%s: Baud rate set to %lu bpsn",
card->wandev.name, max_permitted_baud);
}
card->wandev.bps = conf->bps;
}else{
card->wandev.bps = 0;
}
/* Setup the Port MTU */
if((port_num == WANOPT_PRI) || card->u.c.receive_only) {
/* For Primary Port 0 */
card->wandev.mtu =
(conf->mtu >= MIN_LGTH_CHDLC_DATA_CFG) ?
min_t(unsigned int, conf->mtu, PRI_MAX_NO_DATA_BYTES_IN_FRAME) :
CHDLC_DFLT_DATA_LEN;
} else if(port_num == WANOPT_SEC) {
/* For Secondary Port 1 */
card->wandev.mtu =
(conf->mtu >= MIN_LGTH_CHDLC_DATA_CFG) ?
min_t(unsigned int, conf->mtu, SEC_MAX_NO_DATA_BYTES_IN_FRAME) :
CHDLC_DFLT_DATA_LEN;
}
/* Set up the interrupt status area */
/* Read the CHDLC Configuration and obtain:
* Ptr to shared memory infor struct
* Use this pointer to calculate the value of card->u.c.flags !
*/
mb1->buffer_length = 0;
mb1->command = READ_CHDLC_CONFIGURATION;
err = sdla_exec(mb1) ? mb1->return_code : CMD_TIMEOUT;
if(err != COMMAND_OK) {
if(card->hw.type != SDLA_S514)
enable_irq(card->hw.irq);
chdlc_error(card, err, mb1);
return -EIO;
}
if(card->hw.type == SDLA_S514){
card->u.c.flags = (void *)(card->hw.dpmbase +
(((CHDLC_CONFIGURATION_STRUCT *)mb1->data)->
ptr_shared_mem_info_struct));
}else{
card->u.c.flags = (void *)(card->hw.dpmbase +
(((CHDLC_CONFIGURATION_STRUCT *)mb1->data)->
ptr_shared_mem_info_struct % SDLA_WINDOWSIZE));
}
flags = card->u.c.flags;
/* This is for the ports link state */
card->wandev.state = WAN_DUALPORT;
card->u.c.state = WAN_DISCONNECTED;
if (!card->wandev.piggyback){
int err;
/* Perform interrupt testing */
err = intr_test(card);
if(err || (Intr_test_counter < MAX_INTR_TEST_COUNTER)) {
printk(KERN_INFO "%s: Interrupt test failed (%i)n",
card->devname, Intr_test_counter);
printk(KERN_INFO "%s: Please choose another interruptn",
card->devname);
return -EIO;
}
printk(KERN_INFO "%s: Interrupt test passed (%i)n",
card->devname, Intr_test_counter);
card->configured = 1;
}
if ((card->tty_opt=conf->tty) == WANOPT_YES){
#if defined(LINUX_2_4) || defined(LINUX_2_1)
int err;
card->tty_minor = conf->tty_minor;
/* On ASYNC connections internal clocking
* is mandatory */
if ((card->u.c.async_mode = conf->tty_mode)){
card->wandev.clocking = 1;
}
err=wanpipe_tty_init(card);
if (err){
return err;
}
#else
printk(KERN_INFO "%s: Error: TTY driver is not supported on 2.0.X kernels!n",
card->devname);
return -EINVAL;
#endif
}else{
if (chdlc_set_intr_mode(card, APP_INT_ON_TIMER)){
printk (KERN_INFO "%s:
Failed to set interrupt triggers!n",
card->devname);
return -EIO;
}
/* Mask the Timer interrupt */
flags->interrupt_info_struct.interrupt_permission &=
~APP_INT_ON_TIMER;
}
/* If we are using CHDLC in backup mode, this flag will
* indicate not to look for IP addresses in config_chdlc()*/
card->u.c.backup = conf->backup;
printk(KERN_INFO "n");
return 0;
}
/******* WAN Device Driver Entry Points *************************************/
/*============================================================================
* Update device status & statistics
* This procedure is called when updating the PROC file system and returns
* various communications statistics. These statistics are accumulated from 3
* different locations:
* 1) The 'if_stats' recorded for the device.
* 2) Communication error statistics on the adapter.
* 3) CHDLC operational statistics on the adapter.
* The board level statistics are read during a timer interrupt. Note that we
* read the error and operational statistics during consecitive timer ticks so
* as to minimize the time that we are inside the interrupt handler.
*
*/
static int update (wan_device_t* wandev)
{
sdla_t* card = wandev->private;
netdevice_t* dev;
volatile chdlc_private_area_t* chdlc_priv_area;
SHARED_MEMORY_INFO_STRUCT *flags;
unsigned long timeout;
/* sanity checks */
if((wandev == NULL) || (wandev->private == NULL))
return -EFAULT;
if(wandev->state == WAN_UNCONFIGURED)
return -ENODEV;
/* more sanity checks */
if(!card->u.c.flags)
return -ENODEV;
if(test_bit(PERI_CRIT, (void*)&card->wandev.critical))
return -EAGAIN;
if((dev=card->wandev.dev) == NULL)
return -ENODEV;
if((chdlc_priv_area=dev->priv) == NULL)
return -ENODEV;
flags = card->u.c.flags;
if(chdlc_priv_area->update_comms_stats){
return -EAGAIN;
}
/* we will need 2 timer interrupts to complete the */
/* reading of the statistics */
chdlc_priv_area->update_comms_stats = 2;
flags->interrupt_info_struct.interrupt_permission |= APP_INT_ON_TIMER;
chdlc_priv_area->timer_int_enabled = TMR_INT_ENABLED_UPDATE;
/* wait a maximum of 1 second for the statistics to be updated */
timeout = jiffies;
for(;;) {
if(chdlc_priv_area->update_comms_stats == 0)
break;
if ((jiffies - timeout) > (1 * HZ)){
chdlc_priv_area->update_comms_stats = 0;
chdlc_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 (wan_device_t* wandev, netdevice_t* dev, wanif_conf_t* conf)
{
sdla_t* card = wandev->private;
chdlc_private_area_t* chdlc_priv_area;
printk(KERN_INFO "%s: Configuring Interface: %sn",
card->devname, conf->name);
if ((conf->name[0] == '') || (strlen(conf->name) > WAN_IFNAME_SZ)) {
printk(KERN_INFO "%s: Invalid interface name!n",
card->devname);
return -EINVAL;
}
/* allocate and initialize private data */
chdlc_priv_area = kmalloc(sizeof(chdlc_private_area_t), GFP_KERNEL);
if(chdlc_priv_area == NULL)
return -ENOMEM;
memset(chdlc_priv_area, 0, sizeof(chdlc_private_area_t));
chdlc_priv_area->card = card;
chdlc_priv_area->common.sk = NULL;
chdlc_priv_area->common.func = NULL;
/* initialize data */
strcpy(card->u.c.if_name, conf->name);
if(card->wandev.new_if_cnt > 0) {
kfree(chdlc_priv_area);
return -EEXIST;
}
card->wandev.new_if_cnt++;
chdlc_priv_area->TracingEnabled = 0;
chdlc_priv_area->route_status = NO_ROUTE;
chdlc_priv_area->route_removed = 0;
card->u.c.async_mode = conf->async_mode;
/* setup for asynchronous mode */
if(conf->async_mode) {
printk(KERN_INFO "%s: Configuring for asynchronous moden",
wandev->name);
if(card->u.c.comm_port == WANOPT_PRI) {
printk(KERN_INFO
"%s:Asynchronous mode on secondary port onlyn",
wandev->name);
kfree(chdlc_priv_area);
return -EINVAL;
}
if(strcmp(conf->usedby, "WANPIPE") == 0) {
printk(KERN_INFO
"%s: Running in WANIPE Async Moden", wandev->name);
card->u.c.usedby = WANPIPE;
}else{
card->u.c.usedby = API;
}
if(!card->wandev.clocking) {
printk(KERN_INFO
"%s: Asynch. clocking must be 'Internal'n",
wandev->name);
kfree(chdlc_priv_area);
return -EINVAL;
}
if((card->wandev.bps < MIN_ASY_BAUD_RATE) ||
(card->wandev.bps > MAX_ASY_BAUD_RATE)) {
printk(KERN_INFO "%s: Selected baud rate is invalid.n",
wandev->name);
printk(KERN_INFO "Must be between %u and %u bps.n",
MIN_ASY_BAUD_RATE, MAX_ASY_BAUD_RATE);
kfree(chdlc_priv_area);
return -EINVAL;
}
card->u.c.api_options = 0;
if (conf->asy_data_trans == WANOPT_YES) {
card->u.c.api_options |= ASY_RX_DATA_TRANSPARENT;
}
card->u.c.protocol_options = 0;
if (conf->rts_hs_for_receive == WANOPT_YES) {
card->u.c.protocol_options |= ASY_RTS_HS_FOR_RX;
}
if (conf->xon_xoff_hs_for_receive == WANOPT_YES) {
card->u.c.protocol_options |= ASY_XON_XOFF_HS_FOR_RX;
}
if (conf->xon_xoff_hs_for_transmit == WANOPT_YES) {
card->u.c.protocol_options |= ASY_XON_XOFF_HS_FOR_TX;
}
if (conf->dcd_hs_for_transmit == WANOPT_YES) {
card->u.c.protocol_options |= ASY_DCD_HS_FOR_TX;
}
if (conf->cts_hs_for_transmit == WANOPT_YES) {
card->u.c.protocol_options |= ASY_CTS_HS_FOR_TX;
}
card->u.c.tx_bits_per_char = conf->tx_bits_per_char;
card->u.c.rx_bits_per_char = conf->rx_bits_per_char;
card->u.c.stop_bits = conf->stop_bits;
card->u.c.parity = conf->parity;
card->u.c.break_timer = conf->break_timer;
card->u.c.inter_char_timer = conf->inter_char_timer;
card->u.c.rx_complete_length = conf->rx_complete_length;
card->u.c.xon_char = conf->xon_char;
} else { /* setup for synchronous mode */
card->u.c.protocol_options = 0;
if (conf->ignore_dcd == WANOPT_YES){
card->u.c.protocol_options |= IGNORE_DCD_FOR_LINK_STAT;
}
if (conf->ignore_cts == WANOPT_YES){
card->u.c.protocol_options |= IGNORE_CTS_FOR_LINK_STAT;
}
if (conf->ignore_keepalive == WANOPT_YES) {
card->u.c.protocol_options |=
IGNORE_KPALV_FOR_LINK_STAT;
card->u.c.kpalv_tx = MIN_Tx_KPALV_TIMER;
card->u.c.kpalv_rx = MIN_Rx_KPALV_TIMER;
card->u.c.kpalv_err = MIN_KPALV_ERR_TOL;
} else { /* Do not ignore keepalives */
card->u.c.kpalv_tx =
((conf->keepalive_tx_tmr - MIN_Tx_KPALV_TIMER)
>= 0) ?
min_t(unsigned int, conf->keepalive_tx_tmr,MAX_Tx_KPALV_TIMER) :
DEFAULT_Tx_KPALV_TIMER;
card->u.c.kpalv_rx =
((conf->keepalive_rx_tmr - MIN_Rx_KPALV_TIMER)
>= 0) ?
min_t(unsigned int, conf->keepalive_rx_tmr,MAX_Rx_KPALV_TIMER) :
DEFAULT_Rx_KPALV_TIMER;
card->u.c.kpalv_err =
((conf->keepalive_err_margin-MIN_KPALV_ERR_TOL)
>= 0) ?
min_t(unsigned int, conf->keepalive_err_margin,
MAX_KPALV_ERR_TOL) :
DEFAULT_KPALV_ERR_TOL;
}
/* Setup slarp timer to control delay between slarps */
card->u.c.slarp_timer =
((conf->slarp_timer - MIN_SLARP_REQ_TIMER) >= 0) ?
min_t(unsigned int, conf->slarp_timer, MAX_SLARP_REQ_TIMER) :
DEFAULT_SLARP_REQ_TIMER;
#ifdef LINUX_2_0
if (card->u.c.slarp_timer){
printk(KERN_INFO
"%s: Error: Dynamic IP support not available for 2.0.X kernelsn",
card->devname);
printk(KERN_INFO "%s: Defaulting to Static IP addressingn",
card->devname);
}
card->u.c.slarp_timer=0;
#endif
if (conf->hdlc_streaming == WANOPT_YES) {
printk(KERN_INFO "%s: Enabling HDLC STREAMING Moden",
wandev->name);
card->u.c.protocol_options = HDLC_STREAMING_MODE;
}
if ((chdlc_priv_area->true_if_encoding = conf->true_if_encoding) == WANOPT_YES){
printk(KERN_INFO
"%s: Enabling, true interface type encoding.n",
card->devname);
}
/* Setup wanpipe as a router (WANPIPE) or as an API */
if( strcmp(conf->usedby, "WANPIPE") == 0) {
printk(KERN_INFO "%s: Running in WANPIPE mode!n",
wandev->name);
card->u.c.usedby = WANPIPE;
/* Option to bring down the interface when
* the link goes down */
if (conf->if_down){
set_bit(DYN_OPT_ON,&chdlc_priv_area->interface_down);
printk(KERN_INFO
"%s: Dynamic interface configuration enabledn",
card->devname);
}
} else if( strcmp(conf->usedby, "API") == 0) {
#if defined(LINUX_2_1) || defined(LINUX_2_4)
card->u.c.usedby = API;
printk(KERN_INFO "%s: Running in API mode !n",
wandev->name);
#else
printk(KERN_INFO "%s: API Mode is not supported for kernels lower than 2.2.X!n",
wandev->name);
printk(KERN_INFO "%s: Please upgrade to a 2.2.X kernel fro the API supportn",
wandev->name);
kfree(chdlc_priv_area);
return -EINVAL;
#endif
}
}
#if defined(LINUX_2_1) || defined(LINUX_2_4)
/* Tells us that if this interface is a
* gateway or not */
if ((chdlc_priv_area->gateway = conf->gateway) == WANOPT_YES){
printk(KERN_INFO "%s: Interface %s is set as a gateway.n",
card->devname,card->u.c.if_name);
}
#endif
/* Get Multicast Information */
chdlc_priv_area->mc = conf->mc;
/* prepare network device data space for registration */
#ifdef LINUX_2_4
strcpy(dev->name,card->u.c.if_name);
#else
dev->name = (char *)kmalloc(strlen(card->u.c.if_name) + 2, GFP_KERNEL);
sprintf(dev->name, "%s", card->u.c.if_name);
#endif
dev->init = &if_init;
dev->priv = chdlc_priv_area;
/* Initialize the polling task routine */
#ifndef LINUX_2_4
chdlc_priv_area->poll_task.next = NULL;
#endif
chdlc_priv_area->poll_task.sync=0;
chdlc_priv_area->poll_task.routine = (void*)(void*)chdlc_poll;
chdlc_priv_area->poll_task.data = dev;
/* Initialize the polling delay timer */
init_timer(&chdlc_priv_area->poll_delay_timer);
chdlc_priv_area->poll_delay_timer.data = (unsigned long)dev;
chdlc_priv_area->poll_delay_timer.function = chdlc_poll_delay;
printk(KERN_INFO "n");
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 (netdevice_t* dev)
{
chdlc_private_area_t* chdlc_priv_area = dev->priv;
sdla_t* card = chdlc_priv_area->card;
wan_device_t* wandev = &card->wandev;
#ifdef LINUX_2_0
int i;
#endif
/* 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;
#ifdef LINUX_2_4
dev->tx_timeout = &if_tx_timeout;
dev->watchdog_timeo = TX_TIMEOUT;
#endif
/* Initialize media-specific parameters */
dev->flags |= IFF_POINTOPOINT;
dev->flags |= IFF_NOARP;
/* Enable Mulitcasting if user selected */
if (chdlc_priv_area->mc == WANOPT_YES){
dev->flags |= IFF_MULTICAST;
}
#ifdef LINUX_2_0
dev->family = AF_INET;
#endif
if (chdlc_priv_area->true_if_encoding){
#if defined(LINUX_2_1) || defined(LINUX_2_4)
dev->type = ARPHRD_HDLC; /* This breaks the tcpdump */
#else
dev->type = ARPHRD_PPP;
#endif
}else{
dev->type = ARPHRD_PPP;
}
dev->mtu = card->wandev.mtu;
/* for API usage, add the API header size to the requested MTU size */
if(card->u.c.usedby == API) {
dev->mtu += sizeof(api_tx_hdr_t);
}
dev->hard_header_len = CHDLC_HDR_LEN;
/* Initialize hardware parameters */
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
* If too low packets will not be retransmitted
* by stack.
*/
dev->tx_queue_len = 100;
/* Initialize socket buffers */
#if !defined(LINUX_2_1) && !defined(LINUX_2_4)
for (i = 0; i < DEV_NUMBUFFS; ++i)
skb_queue_head_init(&dev->buffs[i]);
#endif
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 (netdevice_t* dev)
{
chdlc_private_area_t* chdlc_priv_area = dev->priv;
sdla_t* card = chdlc_priv_area->card;
struct timeval tv;
int err = 0;
/* Only one open per interface is allowed */
if (is_dev_running(dev))
return -EBUSY;
#if defined(LINUX_2_1) || defined(LINUX_2_4)
/* Initialize the task queue */
chdlc_priv_area->tq_working=0;
#ifndef LINUX_2_4
chdlc_priv_area->common.wanpipe_task.next = NULL;
#endif
chdlc_priv_area->common.wanpipe_task.sync = 0;
chdlc_priv_area->common.wanpipe_task.routine = (void *)(void *)chdlc_bh;
chdlc_priv_area->common.wanpipe_task.data = dev;
/* Allocate and initialize BH circular buffer */
/* Add 1 to MAX_BH_BUFF so we don't have test with (MAX_BH_BUFF-1) */
chdlc_priv_area->bh_head = kmalloc((sizeof(bh_data_t)*(MAX_BH_BUFF+1)),GFP_ATOMIC);
memset(chdlc_priv_area->bh_head,0,(sizeof(bh_data_t)*(MAX_BH_BUFF+1)));
atomic_set(&chdlc_priv_area->bh_buff_used, 0);
#endif
do_gettimeofday(&tv);
chdlc_priv_area->router_start_time = tv.tv_sec;
#ifdef LINUX_2_4
netif_start_queue(dev);
#else
dev->interrupt = 0;
dev->tbusy = 0;
dev->start = 1;
#endif
wanpipe_open(card);
/* TTY is configured during wanpipe_set_termios
* call, not here */
if (card->tty_opt)
return err;
set_bit(0,&chdlc_priv_area->config_chdlc);
chdlc_priv_area->config_chdlc_timeout=jiffies;
del_timer(&chdlc_priv_area->poll_delay_timer);
/* Start the CHDLC configuration after 1sec delay.
* This will give the interface initilization time
* to finish its configuration */
chdlc_priv_area->poll_delay_timer.expires=jiffies+HZ;
add_timer(&chdlc_priv_area->poll_delay_timer);
return err;
}
/*============================================================================
* Close network interface.
* o if this is the last close, then disable communications and interrupts.
* o reset flags.
*/
static int if_close (netdevice_t* dev)
{
chdlc_private_area_t* chdlc_priv_area = dev->priv;
sdla_t* card = chdlc_priv_area->card;
#if defined(LINUX_2_1) || defined(LINUX_2_4)
if (chdlc_priv_area->bh_head){
int i;
struct sk_buff *skb;
for (i=0; i<(MAX_BH_BUFF+1); i++){
skb = ((bh_data_t *)&chdlc_priv_area->bh_head[i])->skb;
if (skb != NULL){
wan_dev_kfree_skb(skb, FREE_READ);
}
}
kfree(chdlc_priv_area->bh_head);
chdlc_priv_area->bh_head=NULL;
}
#endif
stop_net_queue(dev);
#ifndef LINUX_2_4
dev->start=0;
#endif
wanpipe_close(card);
del_timer(&chdlc_priv_area->poll_delay_timer);
return 0;
}
static void disable_comm (sdla_t *card)
{
SHARED_MEMORY_INFO_STRUCT *flags = card->u.c.flags;
if (card->u.c.comm_enabled){
chdlc_disable_comm_shutdown (card);
}else{
flags->interrupt_info_struct.interrupt_permission = 0;
}
#if defined(LINUX_2_4) || defined(LINUX_2_1)
if (!tty_init_cnt)
return;
if (card->tty_opt){
struct serial_state * state;
if (!(--tty_init_cnt)){
int e1,e2;
*serial_driver.refcount=0;
if ((e1 = tty_unregister_driver(&serial_driver)))
printk("SERIAL: failed to unregister serial driver (%d)n",
e1);
if ((e2 = tty_unregister_driver(&callout_driver)))
printk("SERIAL: failed to unregister callout driver (%d)n",
e2);
printk(KERN_INFO "%s: Unregistering TTY Driver, Major %in",
card->devname,WAN_TTY_MAJOR);
}
card->tty=NULL;
tty_card_map[card->tty_minor]=NULL;
state = &rs_table[card->tty_minor];
memset(state,0,sizeof(state));
}
#endif
return;
}
/*============================================================================
* 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, netdevice_t* dev,
unsigned short type, void* daddr, void* saddr, unsigned len)
{
skb->protocol = htons(type);
return CHDLC_HDR_LEN;
}
#ifdef LINUX_2_4
/*============================================================================
* Handle transmit timeout event from netif watchdog
*/
static void if_tx_timeout (netdevice_t *dev)
{
chdlc_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.
*/
++card->wandev.stats.collisions;
printk (KERN_INFO "%s: Transmit timed out on %sn", card->devname,dev->name);
netif_wake_queue (dev);
}
#endif
/*============================================================================
* Re-build media header.
*
* Return: 1 physical address resolved.
* 0 physical address not resolved
*/
#if defined(LINUX_2_1) || defined(LINUX_2_4)
static int if_rebuild_hdr (struct sk_buff *skb)
{
return 1;
}
#else
static int if_rebuild_hdr (void* hdr, netdevice_t* dev, unsigned long raddr,
struct sk_buff* skb)
{
return 1;
}
#endif
/*============================================================================
* 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, netdevice_t* dev)
{
chdlc_private_area_t *chdlc_priv_area = dev->priv;
sdla_t *card = chdlc_priv_area->card;
SHARED_MEMORY_INFO_STRUCT *flags = card->u.c.flags;
INTERRUPT_INFORMATION_STRUCT *chdlc_int = &flags->interrupt_info_struct;
int udp_type = 0;
unsigned long smp_flags;
int err=0;
#ifdef LINUX_2_4
netif_stop_queue(dev);
#endif
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);
wake_net_dev(dev);
return 0;
}
#ifndef LINUX_2_4
if (dev->tbusy){
/* 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.
*/
++card->wandev.stats.collisions;
if((jiffies - chdlc_priv_area->tick_counter) < (5 * HZ)) {
return 1;
}
printk (KERN_INFO "%s: Transmit timeout !n",
card->devname);
/* unbusy the interface */
clear_bit(0,&dev->tbusy);
}
#endif
if (ntohs(skb->protocol) != htons(PVC_PROT)){
/* check the udp packet type */
udp_type = udp_pkt_type(skb, card);
if (udp_type == UDP_CPIPE_TYPE){
if(store_udp_mgmt_pkt(UDP_PKT_FRM_STACK, card, skb, dev,
chdlc_priv_area)){
chdlc_int->interrupt_permission |=
APP_INT_ON_TIMER;
}
start_net_queue(dev);
return 0;
}
/* check to see if the source IP address is a broadcast or */
/* multicast IP address */
if(chk_bcast_mcast_addr(card, dev, skb)){
++card->wandev.stats.tx_dropped;
wan_dev_kfree_skb(skb,FREE_WRITE);
start_net_queue(dev);
return 0;
}
}
/* Lock the 508 Card: SMP is supported */
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: %lxn",
card->wandev.name,card->wandev.critical);
++card->wandev.stats.tx_dropped;
start_net_queue(dev);
goto if_send_exit_crit;
}
if(card->u.c.state != WAN_CONNECTED){
++card->wandev.stats.tx_dropped;
start_net_queue(dev);
}else if(!skb->protocol){
++card->wandev.stats.tx_errors;
start_net_queue(dev);
}else {
void* data = skb->data;
unsigned len = skb->len;
unsigned char attr;
/* If it's an API packet pull off the API
* header. Also check that the packet size
* is larger than the API header
*/
if (card->u.c.usedby == API){
api_tx_hdr_t* api_tx_hdr;
/* discard the frame if we are configured for */
/* 'receive only' mode or if there is no data */
if (card->u.c.receive_only ||
(len <= sizeof(api_tx_hdr_t))) {
++card->wandev.stats.tx_dropped;
start_net_queue(dev);
goto if_send_exit_crit;
}
api_tx_hdr = (api_tx_hdr_t *)data;
attr = api_tx_hdr->attr;
data += sizeof(api_tx_hdr_t);
len -= sizeof(api_tx_hdr_t);
}
if(chdlc_send(card, data, len)) {
stop_net_queue(dev);
}else{
++card->wandev.stats.tx_packets;
#if defined(LINUX_2_1) || defined(LINUX_2_4)
card->wandev.stats.tx_bytes += len;
#endif
start_net_queue(dev);
#ifdef LINUX_2_4
dev->trans_start = jiffies;
#endif
}
}
if_send_exit_crit:
if (!(err=is_queue_stopped(dev))) {
wan_dev_kfree_skb(skb, FREE_WRITE);
}else{
chdlc_priv_area->tick_counter = jiffies;
chdlc_int->interrupt_permission |= APP_INT_ON_TX_FRAME;
}
clear_bit(SEND_CRIT, (void*)&card->wandev.critical);
if(card->hw.type != SDLA_S514){
s508_unlock(card,&smp_flags);
}
return err;
}
/*============================================================================
* 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, netdevice_t* dev,
struct sk_buff *skb)
{
u32 src_ip_addr;
u32 broadcast_ip_addr = 0;
#if defined(LINUX_2_1) || defined(LINUX_2_4)
struct in_device *in_dev;
#endif
/* read the IP source address from the outgoing packet */
src_ip_addr = *(u32 *)(skb->data + 12);
/* read the IP broadcast address for the device */
#if defined(LINUX_2_1) || defined(LINUX_2_4)
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;
}
#else
broadcast_ip_addr = dev->pa_brdaddr;
#endif
/* 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 discardedn",
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 discardedn",
card->devname);
return 1;
}
return 0;
}
/*============================================================================
* 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;
chdlc_udp_pkt_t *c_udp_pkt = (chdlc_udp_pkt_t *)data;
/* Set length of packet */
len = sizeof(ip_pkt_t)+
sizeof(udp_pkt_t)+
sizeof(wp_mgmt_t)+
sizeof(cblock_t)+
sizeof(trace_info_t)+
mbox_len;
/* fill in UDP reply */
c_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)+
sizeof(trace_info_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);
c_udp_pkt->udp_pkt.udp_length = temp;
/* swap UDP ports */
temp = c_udp_pkt->udp_pkt.udp_src_port;
c_udp_pkt->udp_pkt.udp_src_port =
c_udp_pkt->udp_pkt.udp_dst_port;
c_udp_pkt->udp_pkt.udp_dst_port = temp;
/* add UDP pseudo header */
temp = 0x1100;
*((unsigned short *)(c_udp_pkt->data+mbox_len+even_bound)) = temp;
temp = (udp_length<<8)|(udp_length>>8);
*((unsigned short *)(c_udp_pkt->data+mbox_len+even_bound+2)) = temp;
/* calculate UDP checksum */
c_udp_pkt->udp_pkt.udp_checksum = 0;
c_udp_pkt->udp_pkt.udp_checksum = calc_checksum(&data[UDP_OFFSET],udp_length+UDP_OFFSET);
/* fill in IP length */
ip_length = len;
temp = (ip_length<<8)|(ip_length>>8);
c_udp_pkt->ip_pkt.total_length = temp;
/* swap IP addresses */
ip_temp = c_udp_pkt->ip_pkt.ip_src_address;
c_udp_pkt->ip_pkt.ip_src_address = c_udp_pkt->ip_pkt.ip_dst_address;
c_udp_pkt->ip_pkt.ip_dst_address = ip_temp;
/* fill in IP checksum */
c_udp_pkt->ip_pkt.hdr_checksum = 0;
c_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;
}
/*============================================================================
* Get ethernet-style interface statistics.
* Return a pointer to struct enet_statistics.
*/
#if defined(LINUX_2_1) || defined(LINUX_2_4)
static struct net_device_stats* if_stats (netdevice_t* dev)
{
sdla_t *my_card;
chdlc_private_area_t* chdlc_priv_area;
if ((chdlc_priv_area=dev->priv) == NULL)
return NULL;
my_card = chdlc_priv_area->card;
return &my_card->wandev.stats;
}
#else
static struct enet_statistics* if_stats (netdevice_t* dev)
{
sdla_t *my_card;
chdlc_private_area_t* chdlc_priv_area = dev->priv;
if ((chdlc_priv_area=dev->priv) == NULL)
return NULL;
my_card = chdlc_priv_area->card;
return &my_card->wandev.stats;
}
#endif
/****** Cisco HDLC Firmware Interface Functions *******************************/
/*============================================================================
* Read firmware code version.
* Put code version as ASCII string in str.
*/
static int chdlc_read_version (sdla_t* card, char* str)
{
CHDLC_MAILBOX_STRUCT* mb = card->mbox;
int len;
char err;
mb->buffer_length = 0;
mb->command = READ_CHDLC_CODE_VERSION;
err = sdla_exec(mb) ? mb->return_code : CMD_TIMEOUT;
if(err != COMMAND_OK) {
chdlc_error(card,err,mb);
}
else if (str) { /* is not null */
len = mb->buffer_length;
memcpy(str, mb->data, len);
str[len] = '';
}
return (err);
}
/*-----------------------------------------------------------------------------
* Configure CHDLC firmware.
*/
static int chdlc_configure (sdla_t* card, void* data)
{
int err;
CHDLC_MAILBOX_STRUCT *mailbox = card->mbox;
int data_length = sizeof(CHDLC_CONFIGURATION_STRUCT);
mailbox->buffer_length = data_length;
memcpy(mailbox->data, data, data_length);
mailbox->command = SET_CHDLC_CONFIGURATION;
err = sdla_exec(mailbox) ? mailbox->return_code : CMD_TIMEOUT;
if (err != COMMAND_OK) chdlc_error (card, err, mailbox);
return err;
}
/*============================================================================
* Set interrupt mode -- HDLC Version.
*/
static int chdlc_set_intr_mode (sdla_t* card, unsigned mode)
{
CHDLC_MAILBOX_STRUCT* mb = card->mbox;
CHDLC_INT_TRIGGERS_STRUCT* int_data =
(CHDLC_INT_TRIGGERS_STRUCT *)mb->data;
int err;
int_data->CHDLC_interrupt_triggers = mode;
int_data->IRQ = card->hw.irq;
int_data->interrupt_timer = 1;
mb->buffer_length = sizeof(CHDLC_INT_TRIGGERS_STRUCT);
mb->command = SET_CHDLC_INTERRUPT_TRIGGERS;
err = sdla_exec(mb) ? mb->return_code : CMD_TIMEOUT;
if (err != COMMAND_OK)
chdlc_error (card, err, mb);
return err;
}
/*===========================================================
* chdlc_disable_comm_shutdown
*
* Shutdown() disables the communications. We must
* have a sparate functions, because we must not
* call chdlc_error() hander since the private
* area has already been replaced */
static int chdlc_disable_comm_shutdown (sdla_t *card)
{
CHDLC_MAILBOX_STRUCT* mb = card->mbox;
CHDLC_INT_TRIGGERS_STRUCT* int_data =
(CHDLC_INT_TRIGGERS_STRUCT *)mb->data;
int err;
/* Disable Interrutps */
int_data->CHDLC_interrupt_triggers = 0;
int_data->IRQ = card->hw.irq;
int_data->interrupt_timer = 1;
mb->buffer_length = sizeof(CHDLC_INT_TRIGGERS_STRUCT);
mb->command = SET_CHDLC_INTERRUPT_TRIGGERS;
err = sdla_exec(mb) ? mb->return_code : CMD_TIMEOUT;
/* Disable Communications */
if (card->u.c.async_mode) {
mb->command = DISABLE_ASY_COMMUNICATIONS;
}else{
mb->command = DISABLE_CHDLC_COMMUNICATIONS;
}
mb->buffer_length = 0;
err = sdla_exec(mb) ? mb->return_code : CMD_TIMEOUT;
card->u.c.comm_enabled = 0;
return 0;
}
/*============================================================================
* Enable communications.
*/
static int chdlc_comm_enable (sdla_t* card)
{
int err;
CHDLC_MAILBOX_STRUCT* mb = card->mbox;
mb->buffer_length = 0;
mb->command = ENABLE_CHDLC_COMMUNICATIONS;
err = sdla_exec(mb) ? mb->return_code : CMD_TIMEOUT;
if (err != COMMAND_OK)
chdlc_error(card, err, mb);
else
card->u.c.comm_enabled = 1;
return err;
}
/*============================================================================
* Read communication error statistics.
*/
static int chdlc_read_comm_err_stats (sdla_t* card)
{
int err;
CHDLC_MAILBOX_STRUCT* mb = card->mbox;
mb->buffer_length = 0;
mb->command = READ_COMMS_ERROR_STATS;
err = sdla_exec(mb) ? mb->return_code : CMD_TIMEOUT;
if (err != COMMAND_OK)
chdlc_error(card,err,mb);
return err;
}
/*============================================================================
* Read CHDLC operational statistics.
*/
static int chdlc_read_op_stats (sdla_t* card)
{
int err;
CHDLC_MAILBOX_STRUCT* mb = card->mbox;
mb->buffer_length = 0;
mb->command = READ_CHDLC_OPERATIONAL_STATS;
err = sdla_exec(mb) ? mb->return_code : CMD_TIMEOUT;
if (err != COMMAND_OK)
chdlc_error(card,err,mb);
return err;
}
/*============================================================================
* Update communications error and general packet statistics.
*/
static int update_comms_stats(sdla_t* card,
chdlc_private_area_t* chdlc_priv_area)
{
CHDLC_MAILBOX_STRUCT* mb = card->mbox;
COMMS_ERROR_STATS_STRUCT* err_stats;
CHDLC_OPERATIONAL_STATS_STRUCT *op_stats;
/* on the first timer interrupt, read the comms error statistics */
if(chdlc_priv_area->update_comms_stats == 2) {
if(chdlc_read_comm_err_stats(card))
return 1;
err_stats = (COMMS_ERROR_STATS_STRUCT *)mb->data;
card->wandev.stats.rx_over_errors =
err_stats->Rx_overrun_err_count;
card->wandev.stats.rx_crc_errors =
err_stats->CRC_err_count;
card->wandev.stats.rx_frame_errors =
err_stats->Rx_abort_count;
card->wandev.stats.rx_fifo_errors =
err_stats->Rx_dis_pri_bfrs_full_count;
card->wandev.stats.rx_missed_errors =
card->wandev.stats.rx_fifo_errors;
card->wandev.stats.tx_aborted_errors =
err_stats->sec_Tx_abort_count;
}
/* on the second timer interrupt, read the operational statistics */
else {
if(chdlc_read_op_stats(card))
return 1;
op_stats = (CHDLC_OPERATIONAL_STATS_STRUCT *)mb->data;
card->wandev.stats.rx_length_errors =
(op_stats->Rx_Data_discard_short_count +
op_stats->Rx_Data_discard_long_count);
}
return 0;
}
/*============================================================================
* Send packet.
* Return: 0 - o.k.
* 1 - no transmit buffers available
*/
static int chdlc_send (sdla_t* card, void* data, unsigned len)
{
CHDLC_DATA_TX_STATUS_EL_STRUCT *txbuf = card->u.c.txbuf;
if (txbuf->opp_flag)
return 1;
sdla_poke(&card->hw, txbuf->ptr_data_bfr, data, len);
txbuf->frame_length = len;
txbuf->opp_flag = 1; /* start transmission */
/* Update transmit buffer control fields */
card->u.c.txbuf = ++txbuf;
if ((void*)txbuf > card->u.c.txbuf_last)
card->u.c.txbuf = card->u.c.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 chdlc_error (sdla_t *card, int err, CHDLC_MAILBOX_STRUCT *mb)
{
unsigned cmd = mb->command;
switch (err) {
case CMD_TIMEOUT:
printk(KERN_INFO "%s: command 0x%02X timed out!n",
card->devname, cmd);
break;
case S514_BOTH_PORTS_SAME_CLK_MODE:
if(cmd == SET_CHDLC_CONFIGURATION) {
printk(KERN_INFO
"%s: Configure both ports for the same clock sourcen",
card->devname);
break;
}
default:
printk(KERN_INFO "%s: command 0x%02X returned 0x%02X!n",
card->devname, cmd, err);
}
return 0;
}
#if defined(LINUX_2_1) || defined(LINUX_2_4)
/********** Bottom Half Handlers ********************************************/
/* NOTE: There is no API, BH support for Kernels lower than 2.2.X.
* DO NOT INSERT ANY CODE HERE, NOTICE THE
* PREPROCESSOR STATEMENT ABOVE, UNLESS YOU KNOW WHAT YOU ARE
* DOING */
static void chdlc_bh (netdevice_t * dev)
{
chdlc_private_area_t* chan = dev->priv;
sdla_t *card = chan->card;
struct sk_buff *skb;
if (atomic_read(&chan->bh_buff_used) == 0){
clear_bit(0, &chan->tq_working);
return;
}
while (atomic_read(&chan->bh_buff_used)){
skb = ((bh_data_t *)&chan->bh_head[chan->bh_read])->skb;
if (skb != NULL){
if (chan->common.sk == NULL || chan->common.func == NULL){
++card->wandev.stats.rx_dropped;
wan_dev_kfree_skb(skb, FREE_READ);
chdlc_bh_cleanup(dev);
continue;
}
if (chan->common.func(skb,dev,chan->common.sk) != 0){
/* Sock full cannot send, queue us for another
* try */
atomic_set(&chan->common.receive_block,1);
return;
}else{
chdlc_bh_cleanup(dev);
}
}else{
chdlc_bh_cleanup(dev);
}
}
clear_bit(0, &chan->tq_working);
return;
}
static int chdlc_bh_cleanup (netdevice_t *dev)
{
chdlc_private_area_t* chan = dev->priv;
((bh_data_t *)&chan->bh_head[chan->bh_read])->skb = NULL;
if (chan->bh_read == MAX_BH_BUFF){
chan->bh_read=0;
}else{
++chan->bh_read;
}
atomic_dec(&chan->bh_buff_used);
return 0;
}
static int bh_enqueue (netdevice_t *dev, struct sk_buff *skb)
{
/* Check for full */
chdlc_private_area_t* chan = dev->priv;
sdla_t *card = chan->card;
if (atomic_read(&chan->bh_buff_used) == (MAX_BH_BUFF+1)){
++card->wandev.stats.rx_dropped;
wan_dev_kfree_skb(skb, FREE_READ);
return 1;
}
((bh_data_t *)&chan->bh_head[chan->bh_write])->skb = skb;
if (chan->bh_write == MAX_BH_BUFF){
chan->bh_write=0;
}else{
++chan->bh_write;
}
atomic_inc(&chan->bh_buff_used);
return 0;
}
/* END OF API BH Support */
#endif
/****** Interrupt Handlers **************************************************/
/*============================================================================
* Cisco HDLC interrupt service routine.
*/
static void wpc_isr (sdla_t* card)
{
netdevice_t* dev;
SHARED_MEMORY_INFO_STRUCT* flags = NULL;
int i;
sdla_t *my_card;
/* Check for which port the interrupt has been generated
* Since Secondary Port is piggybacking on the Primary
* the check must be done here.
*/
flags = card->u.c.flags;
if (!flags->interrupt_info_struct.interrupt_type){
/* Check for a second port (piggybacking) */
if ((my_card = card->next)){
flags = my_card->u.c.flags;
if (flags->interrupt_info_struct.interrupt_type){
card = my_card;
card->isr(card);
return;
}
}
}
flags = card->u.c.flags;
card->in_isr = 1;
dev = card->wandev.dev;
/* If we get an interrupt with no network device, stop the interrupts
* and issue an error */
if (!card->tty_opt && !dev &&
flags->interrupt_info_struct.interrupt_type !=
COMMAND_COMPLETE_APP_INT_PEND){
goto isr_done;
}
/* if critical due to peripheral operations
* ie. update() or getstats() then reset the interrupt and
* wait for the board to retrigger.
*/
if(test_bit(PERI_CRIT, (void*)&card->wandev.critical)) {
printk(KERN_INFO "ISR CRIT TO PERIn");
goto isr_done;
}
/* On a 508 Card, if critical due to if_send
* Major Error !!! */
if(card->hw.type != SDLA_S514) {
if(test_bit(SEND_CRIT, (void*)&card->wandev.critical)) {
printk(KERN_INFO "%s: Critical while in ISR: %lxn",
card->devname, card->wandev.critical);
card->in_isr = 0;
flags->interrupt_info_struct.interrupt_type = 0;
return;
}
}
switch(flags->interrupt_info_struct.interrupt_type) {
case RX_APP_INT_PEND: /* 0x01: receive interrupt */
rx_intr(card);
break;
case TX_APP_INT_PEND: /* 0x02: transmit interrupt */
flags->interrupt_info_struct.interrupt_permission &=
~APP_INT_ON_TX_FRAME;
#if defined(LINUX_2_1) || defined(LINUX_2_4)
if (card->tty_opt){
wanpipe_tty_trigger_poll(card);
break;
}
if (dev && is_queue_stopped(dev)){
if (card->u.c.usedby == API){
start_net_queue(dev);
wakeup_sk_bh(dev);
}else{
wake_net_dev(dev);
}
}
#else
wake_net_dev(dev);
#endif
break;
case COMMAND_COMPLETE_APP_INT_PEND:/* 0x04: cmd cplt */
++ Intr_test_counter;
break;
case CHDLC_EXCEP_COND_APP_INT_PEND: /* 0x20 */
process_chdlc_exception(card);
break;
case GLOBAL_EXCEP_COND_APP_INT_PEND:
process_global_exception(card);
break;
case TIMER_APP_INT_PEND:
timer_intr(card);
break;
default:
printk(KERN_INFO "%s: spurious interrupt 0x%02X!n",
card->devname,
flags->interrupt_info_struct.interrupt_type);
printk(KERN_INFO "Code name: ");
for(i = 0; i < 4; i ++)
printk(KERN_INFO "%c",
flags->global_info_struct.codename[i]);
printk(KERN_INFO "nCode version: ");
for(i = 0; i < 4; i ++)
printk(KERN_INFO "%c",
flags->global_info_struct.codeversion[i]);
printk(KERN_INFO "n");
break;
}
isr_done:
card->in_isr = 0;
flags->interrupt_info_struct.interrupt_type = 0;
return;
}
/*============================================================================
* Receive interrupt handler.
*/
static void rx_intr (sdla_t* card)
{
netdevice_t *dev;
chdlc_private_area_t *chdlc_priv_area;
SHARED_MEMORY_INFO_STRUCT *flags = card->u.c.flags;
CHDLC_DATA_RX_STATUS_EL_STRUCT *rxbuf = card->u.c.rxmb;
struct sk_buff *skb;
unsigned len;
unsigned addr = rxbuf->ptr_data_bfr;
void *buf;
int i,udp_type;
if (rxbuf->opp_flag != 0x01) {
printk(KERN_INFO
"%s: corrupted Rx buffer @ 0x%X, flag = 0x%02X!n",
card->devname, (unsigned)rxbuf, rxbuf->opp_flag);
printk(KERN_INFO "Code name: ");
for(i = 0; i < 4; i ++)
printk(KERN_INFO "%c",
flags->global_info_struct.codename[i]);
printk(KERN_INFO "nCode version: ");
for(i = 0; i < 4; i ++)
printk(KERN_INFO "%c",
flags->global_info_struct.codeversion[i]);
printk(KERN_INFO "n");
/* Bug Fix: Mar 6 2000
* If we get a corrupted mailbox, it measn 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");
chdlc_set_intr_mode(card,0);
return;
}
len = rxbuf->frame_length;
#if defined(LINUX_2_4) || defined(LINUX_2_1)
if (card->tty_opt){
if (rxbuf->error_flag){
goto rx_exit;
}
if (len <= CRC_LENGTH){
goto rx_exit;
}
if (!card->u.c.async_mode){
len -= CRC_LENGTH;
}
wanpipe_tty_receive(card,addr,len);
goto rx_exit;
}
#endif
dev = card->wandev.dev;
if (!dev){
goto rx_exit;
}
if (!is_dev_running(dev))
goto rx_exit;
chdlc_priv_area = dev->priv;
/* Allocate socket buffer */
skb = dev_alloc_skb(len);
if (skb == NULL) {
printk(KERN_INFO "%s: no socket buffers available!n",
card->devname);
++card->wandev.stats.rx_dropped;
goto rx_exit;
}
/* Copy data to the socket buffer */
if((addr + len) > card->u.c.rx_top + 1) {
unsigned tmp = card->u.c.rx_top - addr + 1;
buf = skb_put(skb, tmp);
sdla_peek(&card->hw, addr, buf, tmp);
addr = card->u.c.rx_base;
len -= tmp;
}
buf = skb_put(skb, len);
sdla_peek(&card->hw, addr, buf, len);
skb->protocol = htons(ETH_P_IP);
card->wandev.stats.rx_packets ++;
#if defined(LINUX_2_1) || defined(LINUX_2_4)
card->wandev.stats.rx_bytes += skb->len;
#endif
udp_type = udp_pkt_type( skb, card );
if(udp_type == UDP_CPIPE_TYPE) {
if(store_udp_mgmt_pkt(UDP_PKT_FRM_NETWORK,
card, skb, dev, chdlc_priv_area)) {
flags->interrupt_info_struct.
interrupt_permission |=
APP_INT_ON_TIMER;
}
#if defined(LINUX_2_1) || defined(LINUX_2_4)
} else if(card->u.c.usedby == API) {
api_rx_hdr_t* api_rx_hdr;
skb_push(skb, sizeof(api_rx_hdr_t));
api_rx_hdr = (api_rx_hdr_t*)&skb->data[0x00];
api_rx_hdr->error_flag = rxbuf->error_flag;
api_rx_hdr->time_stamp = rxbuf->time_stamp;
skb->protocol = htons(PVC_PROT);
skb->mac.raw = skb->data;
skb->dev = dev;
skb->pkt_type = WAN_PACKET_DATA;
bh_enqueue(dev, skb);
if (!test_and_set_bit(0,&chdlc_priv_area->tq_working)){
wanpipe_queue_tq(&chdlc_priv_area->common.wanpipe_task);
wanpipe_mark_bh();
}
#endif
}else{
/* FIXME: we should check to see if the received packet is a
multicast packet so that we can increment the multicast
statistic
++ chdlc_priv_area->if_stats.multicast;
*/
/* Pass it up the protocol stack */
skb->dev = dev;
skb->mac.raw = skb->data;
netif_rx(skb);
}
rx_exit:
/* Release buffer element and calculate a pointer to the next one */
rxbuf->opp_flag = 0x00;
card->u.c.rxmb = ++ rxbuf;
if((void*)rxbuf > card->u.c.rxbuf_last){
card->u.c.rxmb = card->u.c.rxbuf_base;
}
}
/*============================================================================
* Timer interrupt handler.
* The timer interrupt is used for two purposes:
* 1) Processing udp calls from 'cpipemon'.
* 2) Reading board-level statistics for updating the proc file system.
*/
void timer_intr(sdla_t *card)
{
netdevice_t* dev;
chdlc_private_area_t* chdlc_priv_area = NULL;
SHARED_MEMORY_INFO_STRUCT* flags = NULL;
if ((dev = card->wandev.dev)==NULL){
flags = card->u.c.flags;
flags->interrupt_info_struct.interrupt_permission &=
~APP_INT_ON_TIMER;
return;
}
chdlc_priv_area = dev->priv;
if (chdlc_priv_area->timer_int_enabled & TMR_INT_ENABLED_CONFIG) {
if (!config_chdlc(card)){
chdlc_priv_area->timer_int_enabled &= ~TMR_INT_ENABLED_CONFIG;
}
}
/* process a udp call if pending */
if(chdlc_priv_area->timer_int_enabled & TMR_INT_ENABLED_UDP) {
process_udp_mgmt_pkt(card, dev,
chdlc_priv_area);
chdlc_priv_area->timer_int_enabled &= ~TMR_INT_ENABLED_UDP;
}
/* read the communications statistics if required */
if(chdlc_priv_area->timer_int_enabled & TMR_INT_ENABLED_UPDATE) {
update_comms_stats(card, chdlc_priv_area);
if(!(-- chdlc_priv_area->update_comms_stats)) {
chdlc_priv_area->timer_int_enabled &=
~TMR_INT_ENABLED_UPDATE;
}
}
/* only disable the timer interrupt if there are no udp or statistic */
/* updates pending */
if(!chdlc_priv_area->timer_int_enabled) {
flags = card->u.c.flags;
flags->interrupt_info_struct.interrupt_permission &=
~APP_INT_ON_TIMER;
}
}
/*------------------------------------------------------------------------------
Miscellaneous Functions
- set_chdlc_config() used to set configuration options on the board
------------------------------------------------------------------------------*/
static int set_chdlc_config(sdla_t* card)
{
CHDLC_CONFIGURATION_STRUCT cfg;
memset(&cfg, 0, sizeof(CHDLC_CONFIGURATION_STRUCT));
if(card->wandev.clocking){
cfg.baud_rate = card->wandev.bps;
}
cfg.line_config_options = (card->wandev.interface == WANOPT_RS232) ?
INTERFACE_LEVEL_RS232 : INTERFACE_LEVEL_V35;
cfg.modem_config_options = 0;
cfg.modem_status_timer = 100;
cfg.CHDLC_protocol_options = card->u.c.protocol_options;
if (card->tty_opt){
cfg.CHDLC_API_options = DISCARD_RX_ERROR_FRAMES;
}
cfg.percent_data_buffer_for_Tx = (card->u.c.receive_only) ? 0 : 50;
cfg.CHDLC_statistics_options = (CHDLC_TX_DATA_BYTE_COUNT_STAT |
CHDLC_RX_DATA_BYTE_COUNT_STAT);
if (card->tty_opt){
card->wandev.mtu = TTY_CHDLC_MAX_MTU;
}
cfg.max_CHDLC_data_field_length = card->wandev.mtu;
cfg.transmit_keepalive_timer = card->u.c.kpalv_tx;
cfg.receive_keepalive_timer = card->u.c.kpalv_rx;
cfg.keepalive_error_tolerance = card->u.c.kpalv_err;
cfg.SLARP_request_timer = card->u.c.slarp_timer;
if (cfg.SLARP_request_timer) {
cfg.IP_address = 0;
cfg.IP_netmask = 0;
}else if (card->wandev.dev){
netdevice_t * dev = card->wandev.dev;
chdlc_private_area_t *chdlc_priv_area = dev->priv;
#if defined(LINUX_2_1) || defined(LINUX_2_4)
struct in_device *in_dev = dev->ip_ptr;
if(in_dev != NULL) {
struct in_ifaddr *ifa = in_dev->ifa_list;
if (ifa != NULL ) {
cfg.IP_address = ntohl(ifa->ifa_local);
cfg.IP_netmask = ntohl(ifa->ifa_mask);
chdlc_priv_area->IP_address = ntohl(ifa->ifa_local);
chdlc_priv_area->IP_netmask = ntohl(ifa->ifa_mask);
}
}
#else
cfg.IP_address = ntohl(dev->pa_addr);
cfg.IP_netmask = ntohl(dev->pa_mask);
chdlc_priv_area->IP_address = ntohl(dev->pa_addr);
chdlc_priv_area->IP_netmask = ntohl(dev->pa_mask);
#endif
/* FIXME: We must re-think this message in next release
if((cfg.IP_address & 0x000000FF) > 2) {
printk(KERN_WARNING "n");
printk(KERN_WARNING " WARNING:%s configured with ann",
card->devname);
printk(KERN_WARNING " invalid local IP address.n");
printk(KERN_WARNING " Slarp pragmatics will fail.n");
printk(KERN_WARNING " IP address should be of then");
printk(KERN_WARNING " format A.B.C.1 or A.B.C.2.n");
}
*/
}