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kernel-ark/drivers/net/wan/sdla_ppp.c
Linus Torvalds 1da177e4c3 Linux-2.6.12-rc2 
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
2005-04-16 15:20:36 -07:00

3430 lines
97 KiB
C
Raw Blame History

/*****************************************************************************
* 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 *****************************************************************/
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