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[BRIDGE] ebtables: fix allocation in net/bridge/netfilter/ebtables.c
[deliverable/linux.git] / drivers / net / wan / sdla_ppp.c
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1da177e4
LT		 1/*****************************************************************************
2* sdla_ppp.c WANPIPE(tm) Multiprotocol WAN Link Driver. PPP module.
3*
4* Author: Nenad Corbic <ncorbic@sangoma.com>
5*
6* Copyright: (c) 1995-2001 Sangoma Technologies Inc.
7*
8* This program is free software; you can redistribute it and/or
9* modify it under the terms of the GNU General Public License
10* as published by the Free Software Foundation; either version
11* 2 of the License, or (at your option) any later version.
12* ============================================================================
13* Feb 28, 2001 Nenad Corbic o Updated if_tx_timeout() routine for
14* 2.4.X kernels.
15* Nov 29, 2000 Nenad Corbic o Added the 2.4.x kernel support:
16* get_ip_address() function has moved
17* into the ppp_poll() routine. It cannot
18* be called from an interrupt.
19* Nov 07, 2000 Nenad Corbic o Added security features for UDP debugging:
20* Deny all and specify allowed requests.
21* May 02, 2000 Nenad Corbic o Added the dynamic interface shutdown
22* option. When the link goes down, the
23* network interface IFF_UP flag is reset.
24* Mar 06, 2000 Nenad Corbic o Bug Fix: corrupted mbox recovery.
25* Feb 25, 2000 Nenad Corbic o Fixed the FT1 UDP debugger problem.
26* Feb 09, 2000 Nenad Coribc o Shutdown bug fix. update() was called
27* with NULL dev pointer: no check.
28* Jan 24, 2000 Nenad Corbic o Disabled use of CMD complete inter.
29* Dev 15, 1999 Nenad Corbic o Fixed up header files for 2.0.X kernels
30* Oct 25, 1999 Nenad Corbic o Support for 2.0.X kernels
31* Moved dynamic route processing into
32* a polling routine.
33* Oct 07, 1999 Nenad Corbic o Support for S514 PCI card.
34* Gideon Hack o UPD and Updates executed using timer interrupt
35* Sep 10, 1999 Nenad Corbic o Fixed up the /proc statistics
36* Jul 20, 1999 Nenad Corbic o Remove the polling routines and use
37* interrupts instead.
38* Sep 17, 1998 Jaspreet Singh o Updates for 2.2.X Kernels.
39* Aug 13, 1998 Jaspreet Singh o Improved Line Tracing.
40* Jun 22, 1998 David Fong o Added remote IP address assignment
41* Mar 15, 1998 Alan Cox o 2.1.8x basic port.
42* Apr 16, 1998 Jaspreet Singh o using htons() for the IPX protocol.
43* Dec 09, 1997 Jaspreet Singh o Added PAP and CHAP.
44* o Implemented new routines like
45* ppp_set_inbnd_auth(), ppp_set_outbnd_auth(),
46* tokenize() and strstrip().
47* Nov 27, 1997 Jaspreet Singh o Added protection against enabling of irqs
48* while they have been disabled.
49* Nov 24, 1997 Jaspreet Singh o Fixed another RACE condition caused by
50* disabling and enabling of irqs.
51* o Added new counters for stats on disable/enable
52* IRQs.
53* Nov 10, 1997 Jaspreet Singh o Initialized 'skb->mac.raw' to 'skb->data'
54* before every netif_rx().
55* o Free up the device structure in del_if().
56* Nov 07, 1997 Jaspreet Singh o Changed the delay to zero for Line tracing
57* command.
58* Oct 20, 1997 Jaspreet Singh o Added hooks in for Router UP time.
59* Oct 16, 1997 Jaspreet Singh o The critical flag is used to maintain flow
60* control by avoiding RACE conditions. The
61* cli() and restore_flags() are taken out.
62* A new structure, "ppp_private_area", is added
63* to provide Driver Statistics.
64* Jul 21, 1997 Jaspreet Singh o Protected calls to sdla_peek() by adding
65* save_flags(), cli() and restore_flags().
66* Jul 07, 1997 Jaspreet Singh o Added configurable TTL for UDP packets
67* o Added ability to discard mulitcast and
68* broacast source addressed packets.
69* Jun 27, 1997 Jaspreet Singh o Added FT1 monitor capabilities
70* New case (0x25) statement in if_send routine.
71* Added a global variable rCount to keep track
72* of FT1 status enabled on the board.
73* May 22, 1997 Jaspreet Singh o Added change in the PPP_SET_CONFIG command for
74* 508 card to reflect changes in the new
75* ppp508.sfm for supporting:continous transmission
76* of Configure-Request packets without receiving a
77* reply
78* OR-ed 0x300 to conf_flags
79* o Changed connect_tmout from 900 to 0
80* May 21, 1997 Jaspreet Singh o Fixed UDP Management for multiple boards
81* Apr 25, 1997 Farhan Thawar o added UDP Management stuff
82* Mar 11, 1997 Farhan Thawar Version 3.1.1
83* o fixed (+1) bug in rx_intr()
84* o changed if_send() to return 0 if
85* wandev.critical() is true
86* o free socket buffer in if_send() if
87* returning 0
88* Jan 15, 1997 Gene Kozin Version 3.1.0
89* o implemented exec() entry point
90* Jan 06, 1997 Gene Kozin Initial version.
91*****************************************************************************/
92
93#include <linux/module.h>
94#include <linux/kernel.h> /* printk(), and other useful stuff */
95#include <linux/stddef.h> /* offsetof(), etc. */
96#include <linux/errno.h> /* return codes */
97#include <linux/string.h> /* inline memset(), etc. */
98#include <linux/slab.h> /* kmalloc(), kfree() */
99#include <linux/wanrouter.h> /* WAN router definitions */
100#include <linux/wanpipe.h> /* WANPIPE common user API definitions */
101#include <linux/if_arp.h> /* ARPHRD_* defines */
102#include <asm/byteorder.h> /* htons(), etc. */
103#include <linux/in.h> /* sockaddr_in */
a8178345 104#include <linux/jiffies.h> /* time_after() macro */
1da177e4
LT		 105
106
107#include <asm/uaccess.h>
108#include <linux/inetdevice.h>
109#include <linux/netdevice.h>
110
111#include <linux/if.h>
112#include <linux/sdla_ppp.h> /* PPP firmware API definitions */
113#include <linux/sdlasfm.h> /* S514 Type Definition */
114/****** Defines & Macros ****************************************************/
115
116#define PPP_DFLT_MTU 1500 /* default MTU */
117#define PPP_MAX_MTU 4000 /* maximum MTU */
118#define PPP_HDR_LEN 1
119
120#define MAX_IP_ERRORS 100
121
122#define CONNECT_TIMEOUT (90*HZ) /* link connection timeout */
123#define HOLD_DOWN_TIME (5*HZ) /* link hold down time : Changed from 30 to 5 */
124
125/* For handle_IPXWAN() */
126#define CVHexToAscii(b) (((unsigned char)(b) > (unsigned char)9) ? ((unsigned char)'A' + ((unsigned char)(b) - (unsigned char)10)) : ((unsigned char)'0' + (unsigned char)(b)))
127
128/* Macro for enabling/disabling debugging comments */
129//#define NEX_DEBUG
130#ifdef NEX_DEBUG
131#define NEX_PRINTK(format, a...) printk(format, ## a)
132#else
133#define NEX_PRINTK(format, a...)
134#endif /* NEX_DEBUG */
135
136#define DCD(a) ( a & 0x08 ? "HIGH" : "LOW" )
137#define CTS(a) ( a & 0x20 ? "HIGH" : "LOW" )
138#define LCP(a) ( a == 0x09 ? "OPEN" : "CLOSED" )
139#define IP(a) ( a == 0x09 ? "ENABLED" : "DISABLED" )
140
141#define TMR_INT_ENABLED_UPDATE 0x01
142#define TMR_INT_ENABLED_PPP_EVENT 0x02
143#define TMR_INT_ENABLED_UDP 0x04
144#define TMR_INT_ENABLED_CONFIG 0x20
145
146/* Set Configuraton Command Definitions */
147#define PERCENT_TX_BUFF 60
148#define TIME_BETWEEN_CONF_REQ 30
149#define TIME_BETWEEN_PAP_CHAP_REQ 30
150#define WAIT_PAP_CHAP_WITHOUT_REPLY 300
151#define WAIT_AFTER_DCD_CTS_LOW 5
152#define TIME_DCD_CTS_LOW_AFTER_LNK_DOWN 10
153#define WAIT_DCD_HIGH_AFTER_ENABLE_COMM 900
154#define MAX_CONF_REQ_WITHOUT_REPLY 10
155#define MAX_TERM_REQ_WITHOUT_REPLY 2
156#define NUM_CONF_NAK_WITHOUT_REPLY 5
157#define NUM_AUTH_REQ_WITHOUT_REPLY 10
158
159#define END_OFFSET 0x1F0
160
161
162/******Data Structures*****************************************************/
163
164/* This structure is placed in the private data area of the device structure.
165 * The card structure used to occupy the private area but now the following
166 * structure will incorporate the card structure along with PPP specific data
167 */
168
169typedef struct ppp_private_area
170{
171 struct net_device *slave;
172 sdla_t* card;
173 unsigned long router_start_time; /*router start time in sec */
174 unsigned long tick_counter; /*used for 5 second counter*/
175 unsigned mc; /*multicast support on or off*/
176 unsigned char enable_IPX;
177 unsigned long network_number;
178 unsigned char pap;
179 unsigned char chap;
180 unsigned char sysname[31]; /* system name for in-bnd auth*/
181 unsigned char userid[511]; /* list of user ids */
182 unsigned char passwd[511]; /* list of passwords */
183 unsigned protocol; /* SKB Protocol */
184 u32 ip_local; /* Local IP Address */
185 u32 ip_remote; /* remote IP Address */
186
187 u32 ip_local_tmp;
188 u32 ip_remote_tmp;
189
190 unsigned char timer_int_enabled; /* Who enabled the timer inter*/
191 unsigned char update_comms_stats; /* Used by update function */
192 unsigned long curr_trace_addr; /* Trace information */
193 unsigned long start_trace_addr;
194 unsigned long end_trace_addr;
195
196 unsigned char interface_down; /* Brind down interface when channel
197 goes down */
198 unsigned long config_wait_timeout; /* After if_open() if in dynamic if mode,
199 wait a few seconds before configuring */
200
201 unsigned short udp_pkt_lgth;
202 char udp_pkt_src;
203 char udp_pkt_data[MAX_LGTH_UDP_MGNT_PKT];
204
205 /* PPP specific statistics */
206
207 if_send_stat_t if_send_stat;
208 rx_intr_stat_t rx_intr_stat;
209 pipe_mgmt_stat_t pipe_mgmt_stat;
210
211 unsigned long router_up_time;
212
213 /* Polling work queue entry. Each interface
214 * has its own work queue entry, which is used
215 * to defer events from the interrupt */
216 struct work_struct poll_work;
217 struct timer_list poll_delay_timer;
218
219 u8 gateway;
220 u8 config_ppp;
221 u8 ip_error;
222
223}ppp_private_area_t;
224
225/* variable for keeping track of enabling/disabling FT1 monitor status */
226static int rCount = 0;
227
228extern void disable_irq(unsigned int);
229extern void enable_irq(unsigned int);
230
231/****** Function Prototypes *************************************************/
232
233/* WAN link driver entry points. These are called by the WAN router module. */
234static int update(struct wan_device *wandev);
235static int new_if(struct wan_device *wandev, struct net_device *dev,
236 wanif_conf_t *conf);
237static int del_if(struct wan_device *wandev, struct net_device *dev);
238
239/* WANPIPE-specific entry points */
240static int wpp_exec (struct sdla *card, void *u_cmd, void *u_data);
241
242/* Network device interface */
243static int if_init(struct net_device *dev);
244static int if_open(struct net_device *dev);
245static int if_close(struct net_device *dev);
246static int if_header(struct sk_buff *skb, struct net_device *dev,
247 unsigned short type,
248 void *daddr, void *saddr, unsigned len);
249
250static void if_tx_timeout(struct net_device *dev);
251
252static int if_rebuild_hdr(struct sk_buff *skb);
253static struct net_device_stats *if_stats(struct net_device *dev);
254static int if_send(struct sk_buff *skb, struct net_device *dev);
255
256
257/* PPP firmware interface functions */
258static int ppp_read_version(sdla_t *card, char *str);
259static int ppp_set_outbnd_auth(sdla_t *card, ppp_private_area_t *ppp_priv_area);
260static int ppp_set_inbnd_auth(sdla_t *card, ppp_private_area_t *ppp_priv_area);
261static int ppp_configure(sdla_t *card, void *data);
262static int ppp_set_intr_mode(sdla_t *card, unsigned char mode);
263static int ppp_comm_enable(sdla_t *card);
264static int ppp_comm_disable(sdla_t *card);
265static int ppp_comm_disable_shutdown(sdla_t *card);
266static int ppp_get_err_stats(sdla_t *card);
267static int ppp_send(sdla_t *card, void *data, unsigned len, unsigned proto);
268static int ppp_error(sdla_t *card, int err, ppp_mbox_t *mb);
269
270static void wpp_isr(sdla_t *card);
271static void rx_intr(sdla_t *card);
272static void event_intr(sdla_t *card);
273static void timer_intr(sdla_t *card);
274
275/* Background polling routines */
276static void process_route(sdla_t *card);
277static void retrigger_comm(sdla_t *card);
278
279/* Miscellaneous functions */
280static int read_info( sdla_t *card );
281static int read_connection_info (sdla_t *card);
282static void remove_route( sdla_t *card );
283static int config508(struct net_device *dev, sdla_t *card);
284static void show_disc_cause(sdla_t * card, unsigned cause);
285static int reply_udp( unsigned char *data, unsigned int mbox_len );
286static void process_udp_mgmt_pkt(sdla_t *card, struct net_device *dev,
287 ppp_private_area_t *ppp_priv_area);
288static void init_ppp_tx_rx_buff( sdla_t *card );
289static int intr_test( sdla_t *card );
290static int udp_pkt_type( struct sk_buff *skb , sdla_t *card);
291static void init_ppp_priv_struct( ppp_private_area_t *ppp_priv_area);
292static void init_global_statistics( sdla_t *card );
293static int tokenize(char *str, char **tokens);
294static char* strstrip(char *str, char *s);
295static int chk_bcast_mcast_addr(sdla_t* card, struct net_device* dev,
296 struct sk_buff *skb);
297
298static int config_ppp (sdla_t *);
299static void ppp_poll(struct net_device *dev);
300static void trigger_ppp_poll(struct net_device *dev);
301static void ppp_poll_delay (unsigned long dev_ptr);
302
303
304static int Read_connection_info;
305static int Intr_test_counter;
306static unsigned short available_buffer_space;
307
308
309/* IPX functions */
310static void switch_net_numbers(unsigned char *sendpacket, unsigned long network_number,
311 unsigned char incoming);
312static int handle_IPXWAN(unsigned char *sendpacket, char *devname, unsigned char enable_PX,
313 unsigned long network_number, unsigned short proto);
314
315/* Lock Functions */
316static void s508_lock (sdla_t *card, unsigned long *smp_flags);
317static void s508_unlock (sdla_t *card, unsigned long *smp_flags);
318
319static int store_udp_mgmt_pkt(char udp_pkt_src, sdla_t* card,
320 struct sk_buff *skb, struct net_device* dev,
321 ppp_private_area_t* ppp_priv_area );
322static unsigned short calc_checksum (char *data, int len);
323static void disable_comm (sdla_t *card);
324static int detect_and_fix_tx_bug (sdla_t *card);
325
326/****** Public Functions ****************************************************/
327
328/*============================================================================
329 * PPP protocol initialization routine.
330 *
331 * This routine is called by the main WANPIPE module during setup. At this
332 * point adapter is completely initialized and firmware is running.
333 * o read firmware version (to make sure it's alive)
334 * o configure adapter
335 * o initialize protocol-specific fields of the adapter data space.
336 *
337 * Return: 0 o.k.
338 * < 0 failure.
339 */
340int wpp_init(sdla_t *card, wandev_conf_t *conf)
341{
342 ppp_flags_t *flags;
343 union
344 {
345 char str[80];
346 } u;
347
348 /* Verify configuration ID */
349 if (conf->config_id != WANCONFIG_PPP) {
350
351 printk(KERN_INFO "%s: invalid configuration ID %u!\n",
352 card->devname, conf->config_id);
353 return -EINVAL;
354
355 }
356
357 /* Initialize miscellaneous pointers to structures on the adapter */
358 switch (card->hw.type) {
359
360 case SDLA_S508:
361 card->mbox =(void*)(card->hw.dpmbase + PPP508_MB_OFFS);
362 card->flags=(void*)(card->hw.dpmbase + PPP508_FLG_OFFS);
363 break;
364
365 case SDLA_S514:
366 card->mbox =(void*)(card->hw.dpmbase + PPP514_MB_OFFS);
367 card->flags=(void*)(card->hw.dpmbase + PPP514_FLG_OFFS);
368 break;
369
370 default:
371 return -EINVAL;
372
373 }
374 flags = card->flags;
375
376 /* Read firmware version. Note that when adapter initializes, it
377 * clears the mailbox, so it may appear that the first command was
378 * executed successfully when in fact it was merely erased. To work
379 * around this, we execute the first command twice.
380 */
381 if (ppp_read_version(card, NULL) || ppp_read_version(card, u.str))
382 return -EIO;
383
384 printk(KERN_INFO "%s: running PPP firmware v%s\n",card->devname, u.str);
385 /* Adjust configuration and set defaults */
386 card->wandev.mtu = (conf->mtu) ?
387 min_t(unsigned int, conf->mtu, PPP_MAX_MTU) : PPP_DFLT_MTU;
388
389 card->wandev.bps = conf->bps;
390 card->wandev.interface = conf->interface;
391 card->wandev.clocking = conf->clocking;
392 card->wandev.station = conf->station;
393 card->isr = &wpp_isr;
394 card->poll = NULL;
395 card->exec = &wpp_exec;
396 card->wandev.update = &update;
397 card->wandev.new_if = &new_if;
398 card->wandev.del_if = &del_if;
399 card->wandev.udp_port = conf->udp_port;
400 card->wandev.ttl = conf->ttl;
401 card->wandev.state = WAN_DISCONNECTED;
402 card->disable_comm = &disable_comm;
403 card->irq_dis_if_send_count = 0;
404 card->irq_dis_poll_count = 0;
405 card->u.p.authenticator = conf->u.ppp.authenticator;
406 card->u.p.ip_mode = conf->u.ppp.ip_mode ?
407 conf->u.ppp.ip_mode : WANOPT_PPP_STATIC;
408 card->TracingEnabled = 0;
409 Read_connection_info = 1;
410
411 /* initialize global statistics */
412 init_global_statistics( card );
413
414
415
416 if (!card->configured){
417 int err;
418
419 Intr_test_counter = 0;
420 err = intr_test(card);
421
422 if(err || (Intr_test_counter < MAX_INTR_TEST_COUNTER)) {
423 printk("%s: Interrupt Test Failed, Counter: %i\n",
424 card->devname, Intr_test_counter);
425 printk( "%s: Please choose another interrupt\n",card->devname);
426 return -EIO;
427 }
428
429 printk(KERN_INFO "%s: Interrupt Test Passed, Counter: %i\n",
430 card->devname, Intr_test_counter);
431 card->configured = 1;
432 }
433
434 ppp_set_intr_mode(card, PPP_INTR_TIMER);
435
436 /* Turn off the transmit and timer interrupt */
437 flags->imask &= ~PPP_INTR_TIMER;
438
439 printk(KERN_INFO "\n");
440
441 return 0;
442}
443
444/******* WAN Device Driver Entry Points *************************************/
445
446/*============================================================================
447 * Update device status & statistics.
448 */
449static int update(struct wan_device *wandev)
450{
451 sdla_t* card = wandev->private;
452 struct net_device* dev;
453 volatile ppp_private_area_t *ppp_priv_area;
454 ppp_flags_t *flags = card->flags;
455 unsigned long timeout;
456
457 /* sanity checks */
458 if ((wandev == NULL) || (wandev->private == NULL))
459 return -EFAULT;
460
461 if (wandev->state == WAN_UNCONFIGURED)
462 return -ENODEV;
463
464 /* Shutdown bug fix. This function can be
465 * called with NULL dev pointer during
466 * shutdown
467 */
468 if ((dev=card->wandev.dev) == NULL){
469 return -ENODEV;
470 }
471
472 if ((ppp_priv_area=dev->priv) == NULL){
473 return -ENODEV;
474 }
475
476 ppp_priv_area->update_comms_stats = 2;
477 ppp_priv_area->timer_int_enabled |= TMR_INT_ENABLED_UPDATE;
478 flags->imask |= PPP_INTR_TIMER;
479
480 /* wait a maximum of 1 second for the statistics to be updated */
481 timeout = jiffies;
482 for(;;) {
483 if(ppp_priv_area->update_comms_stats == 0){
484 break;
485 }
a8178345 486 if (time_after(jiffies, timeout + 1 * HZ)){
1da177e4
LT		 487 ppp_priv_area->update_comms_stats = 0;
488 ppp_priv_area->timer_int_enabled &=
489 ~TMR_INT_ENABLED_UPDATE;
490 return -EAGAIN;
491 }
492 }
493
494 return 0;
495}
496
497/*============================================================================
498 * Create new logical channel.
499 * This routine is called by the router when ROUTER_IFNEW IOCTL is being
500 * handled.
501 * o parse media- and hardware-specific configuration
502 * o make sure that a new channel can be created
503 * o allocate resources, if necessary
504 * o prepare network device structure for registaration.
505 *
506 * Return: 0 o.k.
507 * < 0 failure (channel will not be created)
508 */
509static int new_if(struct wan_device *wandev, struct net_device *dev,
510 wanif_conf_t *conf)
511{
512 sdla_t *card = wandev->private;
513 ppp_private_area_t *ppp_priv_area;
514
515 if (wandev->ndev)
516 return -EEXIST;
517
518
519 printk(KERN_INFO "%s: Configuring Interface: %s\n",
520 card->devname, conf->name);
521
522 if ((conf->name[0] == '\0') || (strlen(conf->name) > WAN_IFNAME_SZ)) {
523
524 printk(KERN_INFO "%s: Invalid interface name!\n",
525 card->devname);
526 return -EINVAL;
527
528 }
529
530 /* allocate and initialize private data */
531 ppp_priv_area = kmalloc(sizeof(ppp_private_area_t), GFP_KERNEL);
532
533 if( ppp_priv_area == NULL )
534 return -ENOMEM;
535
536 memset(ppp_priv_area, 0, sizeof(ppp_private_area_t));
537
538 ppp_priv_area->card = card;
539
540 /* initialize data */
541 strcpy(card->u.p.if_name, conf->name);
542
543 /* initialize data in ppp_private_area structure */
544
545 init_ppp_priv_struct( ppp_priv_area );
546
547 ppp_priv_area->mc = conf->mc;
548 ppp_priv_area->pap = conf->pap;
549 ppp_priv_area->chap = conf->chap;
550
551 /* Option to bring down the interface when
552 * the link goes down */
553 if (conf->if_down){
554 set_bit(DYN_OPT_ON,&ppp_priv_area->interface_down);
555 printk("%s: Dynamic interface configuration enabled\n",
556 card->devname);
557 }
558
559 /* If no user ids are specified */
560 if(!strlen(conf->userid) && (ppp_priv_area->pap||ppp_priv_area->chap)){
561 kfree(ppp_priv_area);
562 return -EINVAL;
563 }
564
565 /* If no passwords are specified */
566 if(!strlen(conf->passwd) && (ppp_priv_area->pap||ppp_priv_area->chap)){
567 kfree(ppp_priv_area);
568 return -EINVAL;
569 }
570
571 if(strlen(conf->sysname) > 31){
572 kfree(ppp_priv_area);
573 return -EINVAL;
574 }
575
576 /* If no system name is specified */
577 if(!strlen(conf->sysname) && (card->u.p.authenticator)){
578 kfree(ppp_priv_area);
579 return -EINVAL;
580 }
581
582 /* copy the data into the ppp private structure */
583 memcpy(ppp_priv_area->userid, conf->userid, strlen(conf->userid));
584 memcpy(ppp_priv_area->passwd, conf->passwd, strlen(conf->passwd));
585 memcpy(ppp_priv_area->sysname, conf->sysname, strlen(conf->sysname));
586
587
588 ppp_priv_area->enable_IPX = conf->enable_IPX;
589 if (conf->network_number){
590 ppp_priv_area->network_number = conf->network_number;
591 }else{
592 ppp_priv_area->network_number = 0xDEADBEEF;
593 }
594
595 /* Tells us that if this interface is a
596 * gateway or not */
597 if ((ppp_priv_area->gateway = conf->gateway) == WANOPT_YES){
598 printk(KERN_INFO "%s: Interface %s is set as a gateway.\n",
599 card->devname,card->u.p.if_name);
600 }
601
602 /* prepare network device data space for registration */
603 strcpy(dev->name,card->u.p.if_name);
604
605 dev->init = &if_init;
606 dev->priv = ppp_priv_area;
607 dev->mtu = min_t(unsigned int, dev->mtu, card->wandev.mtu);
608
609 /* Initialize the polling work routine */
610 INIT_WORK(&ppp_priv_area->poll_work, (void*)(void*)ppp_poll, dev);
611
612 /* Initialize the polling delay timer */
613 init_timer(&ppp_priv_area->poll_delay_timer);
614 ppp_priv_area->poll_delay_timer.data = (unsigned long)dev;
615 ppp_priv_area->poll_delay_timer.function = ppp_poll_delay;
616
617
618 /* Since we start with dummy IP addresses we can say
619 * that route exists */
620 printk(KERN_INFO "\n");
621
622 return 0;
623}
624
625/*============================================================================
626 * Delete logical channel.
627 */
628static int del_if(struct wan_device *wandev, struct net_device *dev)
629{
630 return 0;
631}
632
633static void disable_comm (sdla_t *card)
634{
635 ppp_comm_disable_shutdown(card);
636 return;
637}
638
639/****** WANPIPE-specific entry points ***************************************/
640
641/*============================================================================
642 * Execute adapter interface command.
643 */
644
645//FIXME: Why do we need this ????
646static int wpp_exec(struct sdla *card, void *u_cmd, void *u_data)
647{
648 ppp_mbox_t *mbox = card->mbox;
649 int len;
650
651 if (copy_from_user((void*)&mbox->cmd, u_cmd, sizeof(ppp_cmd_t)))
652 return -EFAULT;
653
654 len = mbox->cmd.length;
655
656 if (len) {
657
658 if( copy_from_user((void*)&mbox->data, u_data, len))
659 return -EFAULT;
660
661 }
662
663 /* execute command */
664 if (!sdla_exec(mbox))
665 return -EIO;
666
667 /* return result */
668 if( copy_to_user(u_cmd, (void*)&mbox->cmd, sizeof(ppp_cmd_t)))
669 return -EFAULT;
670 len = mbox->cmd.length;
671
672 if (len && u_data && copy_to_user(u_data, (void*)&mbox->data, len))
673 return -EFAULT;
674
675 return 0;
676}
677
678/****** Network Device Interface ********************************************/
679
680/*============================================================================
681 * Initialize Linux network interface.
682 *
683 * This routine is called only once for each interface, during Linux network
684 * interface registration. Returning anything but zero will fail interface
685 * registration.
686 */
687static int if_init(struct net_device *dev)
688{
689 ppp_private_area_t *ppp_priv_area = dev->priv;
690 sdla_t *card = ppp_priv_area->card;
691 struct wan_device *wandev = &card->wandev;
692
693 /* Initialize device driver entry points */
694 dev->open = &if_open;
695 dev->stop = &if_close;
696 dev->hard_header = &if_header;
697 dev->rebuild_header = &if_rebuild_hdr;
698 dev->hard_start_xmit = &if_send;
699 dev->get_stats = &if_stats;
700 dev->tx_timeout = &if_tx_timeout;
701 dev->watchdog_timeo = TX_TIMEOUT;
702
703 /* Initialize media-specific parameters */
704 dev->type = ARPHRD_PPP; /* ARP h/w type */
705 dev->flags |= IFF_POINTOPOINT;
706 dev->flags |= IFF_NOARP;
707
708 /* Enable Mulitcasting if specified by user*/
709 if (ppp_priv_area->mc == WANOPT_YES){
710 dev->flags |= IFF_MULTICAST;
711 }
712
713 dev->mtu = wandev->mtu;
714 dev->hard_header_len = PPP_HDR_LEN; /* media header length */
715
716 /* Initialize hardware parameters (just for reference) */
717 dev->irq = wandev->irq;
718 dev->dma = wandev->dma;
719 dev->base_addr = wandev->ioport;
720 dev->mem_start = wandev->maddr;
721 dev->mem_end = wandev->maddr + wandev->msize - 1;
722
723 /* Set transmit buffer queue length */
724 dev->tx_queue_len = 100;
725 SET_MODULE_OWNER(dev);
726
727 return 0;
728}
729
730/*============================================================================
731 * Open network interface.
732 * o enable communications and interrupts.
733 * o prevent module from unloading by incrementing use count
734 *
735 * Return 0 if O.k. or errno.
736 */
737static int if_open(struct net_device *dev)
738{
739 ppp_private_area_t *ppp_priv_area = dev->priv;
740 sdla_t *card = ppp_priv_area->card;
741 struct timeval tv;
742 //unsigned long smp_flags;
743
744 if (netif_running(dev))
745 return -EBUSY;
746
747 wanpipe_open(card);
748
749 netif_start_queue(dev);
750
751 do_gettimeofday( &tv );
752 ppp_priv_area->router_start_time = tv.tv_sec;
753
754 /* We cannot configure the card here because we don't
755 * have access to the interface IP addresses.
756 * Once the interface initilization is complete, we will be
757 * able to access the IP addresses. Therefore,
758 * configure the ppp link in the poll routine */
759 set_bit(0,&ppp_priv_area->config_ppp);
760 ppp_priv_area->config_wait_timeout=jiffies;
761
762 /* Start the PPP configuration after 1sec delay.
763 * This will give the interface initilization time
764 * to finish its configuration */
765 mod_timer(&ppp_priv_area->poll_delay_timer, jiffies + HZ);
766 return 0;
767}
768
769/*============================================================================
770 * Close network interface.
771 * o if this is the last open, then disable communications and interrupts.
772 * o reset flags.
773 */
774static int if_close(struct net_device *dev)
775{
776 ppp_private_area_t *ppp_priv_area = dev->priv;
777 sdla_t *card = ppp_priv_area->card;
778
779 netif_stop_queue(dev);
780 wanpipe_close(card);
781
782 del_timer (&ppp_priv_area->poll_delay_timer);
783 return 0;
784}
785
786/*============================================================================
787 * Build media header.
788 *
789 * The trick here is to put packet type (Ethertype) into 'protocol' field of
790 * the socket buffer, so that we don't forget it. If packet type is not
791 * supported, set skb->protocol to 0 and discard packet later.
792 *
793 * Return: media header length.
794 */
795static int if_header(struct sk_buff *skb, struct net_device *dev,
796 unsigned short type, void *daddr, void *saddr, unsigned len)
797{
798 switch (type)
799 {
800 case ETH_P_IP:
801 case ETH_P_IPX:
802 skb->protocol = htons(type);
803 break;
804
805 default:
806 skb->protocol = 0;
807 }
808
809 return PPP_HDR_LEN;
810}
811
812/*============================================================================
813 * Re-build media header.
814 *
815 * Return: 1 physical address resolved.
816 * 0 physical address not resolved
817 */
818static int if_rebuild_hdr (struct sk_buff *skb)
819{
820 struct net_device *dev = skb->dev;
821 ppp_private_area_t *ppp_priv_area = dev->priv;
822 sdla_t *card = ppp_priv_area->card;
823
824 printk(KERN_INFO "%s: rebuild_header() called for interface %s!\n",
825 card->devname, dev->name);
826 return 1;
827}
828
829/*============================================================================
830 * Handle transmit timeout event from netif watchdog
831 */
832static void if_tx_timeout(struct net_device *dev)
833{
834 ppp_private_area_t* chan = dev->priv;
835 sdla_t *card = chan->card;
836
837 /* If our device stays busy for at least 5 seconds then we will
838 * kick start the device by making dev->tbusy = 0. We expect
839 * that our device never stays busy more than 5 seconds. So this
840 * is only used as a last resort.
841 */
842
843 ++ chan->if_send_stat.if_send_tbusy;
844 ++card->wandev.stats.collisions;
845
846 printk (KERN_INFO "%s: Transmit timed out on %s\n", card->devname,dev->name);
847 ++chan->if_send_stat.if_send_tbusy_timeout;
848 netif_wake_queue (dev);
849}
850
851
852
853/*============================================================================
854 * Send a packet on a network interface.
855 * o set tbusy flag (marks start of the transmission) to block a timer-based
856 * transmit from overlapping.
857 * o check link state. If link is not up, then drop the packet.
858 * o execute adapter send command.
859 * o free socket buffer
860 *
861 * Return: 0 complete (socket buffer must be freed)
862 * non-0 packet may be re-transmitted (tbusy must be set)
863 *
864 * Notes:
865 * 1. This routine is called either by the protocol stack or by the "net
866 * bottom half" (with interrupts enabled).
867 * 2. Setting tbusy flag will inhibit further transmit requests from the
868 * protocol stack and can be used for flow control with protocol layer.
869 */
870static int if_send (struct sk_buff *skb, struct net_device *dev)
871{
872 ppp_private_area_t *ppp_priv_area = dev->priv;
873 sdla_t *card = ppp_priv_area->card;
874 unsigned char *sendpacket;
875 unsigned long smp_flags;
876 ppp_flags_t *flags = card->flags;
877 int udp_type;
878 int err=0;
879
880 ++ppp_priv_area->if_send_stat.if_send_entry;
881
882 netif_stop_queue(dev);
883
884 if (skb == NULL) {
885
886 /* If we get here, some higher layer thinks we've missed an
887 * tx-done interrupt.
888 */
889 printk(KERN_INFO "%s: interface %s got kicked!\n",
890 card->devname, dev->name);
891
892 ++ppp_priv_area->if_send_stat.if_send_skb_null;
893
894 netif_wake_queue(dev);
895 return 0;
896 }
897
898 sendpacket = skb->data;
899
900 udp_type = udp_pkt_type( skb, card );
901
902
903 if (udp_type == UDP_PTPIPE_TYPE){
904 if(store_udp_mgmt_pkt(UDP_PKT_FRM_STACK, card, skb, dev,
905 ppp_priv_area)){
906 flags->imask |= PPP_INTR_TIMER;
907 }
908 ++ppp_priv_area->if_send_stat.if_send_PIPE_request;
909 netif_start_queue(dev);
910 return 0;
911 }
912
913 /* Check for broadcast and multicast addresses
914 * If found, drop (deallocate) a packet and return.
915 */
916 if(chk_bcast_mcast_addr(card, dev, skb)){
917 ++card->wandev.stats.tx_dropped;
918 dev_kfree_skb_any(skb);
919 netif_start_queue(dev);
920 return 0;
921 }
922
923
924 if(card->hw.type != SDLA_S514){
925 s508_lock(card,&smp_flags);
926 }
927
928 if (test_and_set_bit(SEND_CRIT, (void*)&card->wandev.critical)) {
929
930 printk(KERN_INFO "%s: Critical in if_send: %lx\n",
931 card->wandev.name,card->wandev.critical);
932
933 ++card->wandev.stats.tx_dropped;
934 ++ppp_priv_area->if_send_stat.if_send_critical_non_ISR;
935 netif_start_queue(dev);
936 goto if_send_exit_crit;
937 }
938
939 if (card->wandev.state != WAN_CONNECTED) {
940
941 ++ppp_priv_area->if_send_stat.if_send_wan_disconnected;
942 ++card->wandev.stats.tx_dropped;
943 netif_start_queue(dev);
944
945 } else if (!skb->protocol) {
946 ++ppp_priv_area->if_send_stat.if_send_protocol_error;
947 ++card->wandev.stats.tx_errors;
948 netif_start_queue(dev);
949
950 } else {
951
952 /*If it's IPX change the network numbers to 0 if they're ours.*/
953 if( skb->protocol == htons(ETH_P_IPX) ) {
954 if(ppp_priv_area->enable_IPX) {
955 switch_net_numbers( skb->data,
956 ppp_priv_area->network_number, 0);
957 } else {
958 ++card->wandev.stats.tx_dropped;
959 netif_start_queue(dev);
960 goto if_send_exit_crit;
961 }
962 }
963
964 if (ppp_send(card, skb->data, skb->len, skb->protocol)) {
965 netif_stop_queue(dev);
966 ++ppp_priv_area->if_send_stat.if_send_adptr_bfrs_full;
967 ++ppp_priv_area->if_send_stat.if_send_tx_int_enabled;
968 } else {
969 ++ppp_priv_area->if_send_stat.if_send_bfr_passed_to_adptr;
970 ++card->wandev.stats.tx_packets;
971 card->wandev.stats.tx_bytes += skb->len;
972 netif_start_queue(dev);
973 dev->trans_start = jiffies;
974 }
975 }
976
977if_send_exit_crit:
978
979 if (!(err=netif_queue_stopped(dev))){
980 dev_kfree_skb_any(skb);
981 }else{
982 ppp_priv_area->tick_counter = jiffies;
983 flags->imask |= PPP_INTR_TXRDY; /* unmask Tx interrupts */
984 }
985
986 clear_bit(SEND_CRIT,&card->wandev.critical);
987 if(card->hw.type != SDLA_S514){
988 s508_unlock(card,&smp_flags);
989 }
990
991 return err;
992}
993
994
995/*=============================================================================
996 * Store a UDP management packet for later processing.
997 */
998
999static int store_udp_mgmt_pkt(char udp_pkt_src, sdla_t* card,
1000 struct sk_buff *skb, struct net_device* dev,
1001 ppp_private_area_t* ppp_priv_area )
1002{
1003 int udp_pkt_stored = 0;
1004
1005 if(!ppp_priv_area->udp_pkt_lgth && (skb->len<=MAX_LGTH_UDP_MGNT_PKT)){
1006 ppp_priv_area->udp_pkt_lgth = skb->len;
1007 ppp_priv_area->udp_pkt_src = udp_pkt_src;
1008 memcpy(ppp_priv_area->udp_pkt_data, skb->data, skb->len);
1009 ppp_priv_area->timer_int_enabled |= TMR_INT_ENABLED_UDP;
1010 ppp_priv_area->protocol = skb->protocol;
1011 udp_pkt_stored = 1;
1012 }else{
1013 if (skb->len > MAX_LGTH_UDP_MGNT_PKT){
1014 printk(KERN_INFO "%s: PIPEMON UDP request too long : %i\n",
1015 card->devname, skb->len);
1016 }else{
1017 printk(KERN_INFO "%s: PIPEMON UPD request already pending\n",
1018 card->devname);
1019 }
1020 ppp_priv_area->udp_pkt_lgth = 0;
1021 }
1022
1023 if(udp_pkt_src == UDP_PKT_FRM_STACK){
1024 dev_kfree_skb_any(skb);
1025 }else{
1026 dev_kfree_skb_any(skb);
1027 }
1028
1029 return(udp_pkt_stored);
1030}
1031
1032
1033
1034/*============================================================================
1035 * Reply to UDP Management system.
1036 * Return length of reply.
1037 */
1038static int reply_udp( unsigned char *data, unsigned int mbox_len )
1039{
1040 unsigned short len, udp_length, temp, ip_length;
1041 unsigned long ip_temp;
1042 int even_bound = 0;
1043 ppp_udp_pkt_t *p_udp_pkt = (ppp_udp_pkt_t *)data;
1044
1045 /* Set length of packet */
1046 len = sizeof(ip_pkt_t)+
1047 sizeof(udp_pkt_t)+
1048 sizeof(wp_mgmt_t)+
1049 sizeof(cblock_t)+
1050 mbox_len;
1051
1052 /* fill in UDP reply */
1053 p_udp_pkt->wp_mgmt.request_reply = UDPMGMT_REPLY;
1054
1055 /* fill in UDP length */
1056 udp_length = sizeof(udp_pkt_t)+
1057 sizeof(wp_mgmt_t)+
1058 sizeof(cblock_t)+
1059 mbox_len;
1060
1061
1062 /* put it on an even boundary */
1063 if ( udp_length & 0x0001 ) {
1064 udp_length += 1;
1065 len += 1;
1066 even_bound=1;
1067 }
1068
1069 temp = (udp_length<<8)|(udp_length>>8);
1070 p_udp_pkt->udp_pkt.udp_length = temp;
1071
1072
1073 /* swap UDP ports */
1074 temp = p_udp_pkt->udp_pkt.udp_src_port;
1075 p_udp_pkt->udp_pkt.udp_src_port =
1076 p_udp_pkt->udp_pkt.udp_dst_port;
1077 p_udp_pkt->udp_pkt.udp_dst_port = temp;
1078
1079
1080 /* add UDP pseudo header */
1081 temp = 0x1100;
1082 *((unsigned short *)(p_udp_pkt->data+mbox_len+even_bound)) = temp;
1083 temp = (udp_length<<8)|(udp_length>>8);
1084 *((unsigned short *)(p_udp_pkt->data+mbox_len+even_bound+2)) = temp;
1085
1086 /* calculate UDP checksum */
1087 p_udp_pkt->udp_pkt.udp_checksum = 0;
1088 p_udp_pkt->udp_pkt.udp_checksum =
1089 calc_checksum(&data[UDP_OFFSET],udp_length+UDP_OFFSET);
1090
1091 /* fill in IP length */
1092 ip_length = udp_length + sizeof(ip_pkt_t);
1093 temp = (ip_length<<8)|(ip_length>>8);
1094 p_udp_pkt->ip_pkt.total_length = temp;
1095
1096 /* swap IP addresses */
1097 ip_temp = p_udp_pkt->ip_pkt.ip_src_address;
1098 p_udp_pkt->ip_pkt.ip_src_address = p_udp_pkt->ip_pkt.ip_dst_address;
1099 p_udp_pkt->ip_pkt.ip_dst_address = ip_temp;
1100
1101 /* fill in IP checksum */
1102 p_udp_pkt->ip_pkt.hdr_checksum = 0;
1103 p_udp_pkt->ip_pkt.hdr_checksum = calc_checksum(data,sizeof(ip_pkt_t));
1104
1105 return len;
1106
1107} /* reply_udp */
1108
1109unsigned short calc_checksum (char *data, int len)
1110{
1111 unsigned short temp;
1112 unsigned long sum=0;
1113 int i;
1114
1115 for( i = 0; i <len; i+=2 ) {
1116 memcpy(&temp,&data[i],2);
1117 sum += (unsigned long)temp;
1118 }
1119
1120 while (sum >> 16 ) {
1121 sum = (sum & 0xffffUL) + (sum >> 16);
1122 }
1123
1124 temp = (unsigned short)sum;
1125 temp = ~temp;
1126
1127 if( temp == 0 )
1128 temp = 0xffff;
1129
1130 return temp;
1131}
1132
1133/*
1134 If incoming is 0 (outgoing)- if the net numbers is ours make it 0
1135 if incoming is 1 - if the net number is 0 make it ours
1136
1137*/
1138static void switch_net_numbers(unsigned char *sendpacket, unsigned long network_number, unsigned char incoming)
1139{
1140 unsigned long pnetwork_number;
1141
1142 pnetwork_number = (unsigned long)((sendpacket[6] << 24) +
1143 (sendpacket[7] << 16) + (sendpacket[8] << 8) +
1144 sendpacket[9]);
1145
1146 if (!incoming) {
1147 //If the destination network number is ours, make it 0
1148 if( pnetwork_number == network_number) {
1149 sendpacket[6] = sendpacket[7] = sendpacket[8] =
1150 sendpacket[9] = 0x00;
1151 }
1152 } else {
1153 //If the incoming network is 0, make it ours
1154 if( pnetwork_number == 0) {
1155 sendpacket[6] = (unsigned char)(network_number >> 24);
1156 sendpacket[7] = (unsigned char)((network_number &
1157 0x00FF0000) >> 16);
1158 sendpacket[8] = (unsigned char)((network_number &
1159 0x0000FF00) >> 8);
1160 sendpacket[9] = (unsigned char)(network_number &
1161 0x000000FF);
1162 }
1163 }
1164
1165
1166 pnetwork_number = (unsigned long)((sendpacket[18] << 24) +
1167 (sendpacket[19] << 16) + (sendpacket[20] << 8) +
1168 sendpacket[21]);
1169
1170 if( !incoming ) {
1171 //If the source network is ours, make it 0
1172 if( pnetwork_number == network_number) {
1173 sendpacket[18] = sendpacket[19] = sendpacket[20] =
1174 sendpacket[21] = 0x00;
1175 }
1176 } else {
1177 //If the source network is 0, make it ours
1178 if( pnetwork_number == 0 ) {
1179 sendpacket[18] = (unsigned char)(network_number >> 24);
1180 sendpacket[19] = (unsigned char)((network_number &
1181 0x00FF0000) >> 16);
1182 sendpacket[20] = (unsigned char)((network_number &
1183 0x0000FF00) >> 8);
1184 sendpacket[21] = (unsigned char)(network_number &
1185 0x000000FF);
1186 }
1187 }
1188} /* switch_net_numbers */
1189
1190/*============================================================================
1191 * Get ethernet-style interface statistics.
1192 * Return a pointer to struct net_device_stats.
1193 */
1194static struct net_device_stats *if_stats(struct net_device *dev)
1195{
1196
1197 ppp_private_area_t *ppp_priv_area = dev->priv;
1198 sdla_t* card;
1199
1200 if( ppp_priv_area == NULL )
1201 return NULL;
1202
1203 card = ppp_priv_area->card;
1204 return &card->wandev.stats;
1205}
1206
1207/****** PPP Firmware Interface Functions ************************************/
1208
1209/*============================================================================
1210 * Read firmware code version.
1211 * Put code version as ASCII string in str.
1212 */
1213static int ppp_read_version(sdla_t *card, char *str)
1214{
1215 ppp_mbox_t *mb = card->mbox;
1216 int err;
1217
1218 memset(&mb->cmd, 0, sizeof(ppp_cmd_t));
1219 mb->cmd.command = PPP_READ_CODE_VERSION;
1220 err = sdla_exec(mb) ? mb->cmd.result : CMD_TIMEOUT;
1221
1222 if (err != CMD_OK)
1223
1224 ppp_error(card, err, mb);
1225
1226 else if (str) {
1227
1228 int len = mb->cmd.length;
1229
1230 memcpy(str, mb->data, len);
1231 str[len] = '\0';
1232
1233 }
1234
1235 return err;
1236}
1237/*===========================================================================
1238 * Set Out-Bound Authentication.
1239*/
1240static int ppp_set_outbnd_auth (sdla_t *card, ppp_private_area_t *ppp_priv_area)
1241{
1242 ppp_mbox_t *mb = card->mbox;
1243 int err;
1244
1245 memset(&mb->cmd, 0, sizeof(ppp_cmd_t));
1246 memset(&mb->data, 0, (strlen(ppp_priv_area->userid) +
1247 strlen(ppp_priv_area->passwd) + 2 ) );
1248 memcpy(mb->data, ppp_priv_area->userid, strlen(ppp_priv_area->userid));
1249 memcpy((mb->data + strlen(ppp_priv_area->userid) + 1),
1250 ppp_priv_area->passwd, strlen(ppp_priv_area->passwd));
1251
1252 mb->cmd.length = strlen(ppp_priv_area->userid) +
1253 strlen(ppp_priv_area->passwd) + 2 ;
1254
1255 mb->cmd.command = PPP_SET_OUTBOUND_AUTH;
1256
1257 err = sdla_exec(mb) ? mb->cmd.result : CMD_TIMEOUT;
1258
1259 if (err != CMD_OK)
1260 ppp_error(card, err, mb);
1261
1262 return err;
1263}
1264
1265/*===========================================================================
1266 * Set In-Bound Authentication.
1267*/
1268static int ppp_set_inbnd_auth (sdla_t *card, ppp_private_area_t *ppp_priv_area)
1269{
1270 ppp_mbox_t *mb = card->mbox;
1271 int err, i;
1272 char* user_tokens[32];
1273 char* pass_tokens[32];
1274 int userids, passwds;
1275 int add_ptr;
1276
1277 memset(&mb->cmd, 0, sizeof(ppp_cmd_t));
1278 memset(&mb->data, 0, 1008);
1279 memcpy(mb->data, ppp_priv_area->sysname,
1280 strlen(ppp_priv_area->sysname));
1281
1282 /* Parse the userid string and the password string and build a string
1283 to copy it to the data area of the command structure. The string
1284 will look like "SYS_NAME<NULL>USER1<NULL>PASS1<NULL>USER2<NULL>PASS2
1285 ....<NULL> "
1286 */
1287 userids = tokenize( ppp_priv_area->userid, user_tokens);
1288 passwds = tokenize( ppp_priv_area->passwd, pass_tokens);
1289
1290 if (userids != passwds){
1291 printk(KERN_INFO "%s: Number of passwords does not equal the number of user ids\n", card->devname);
1292 return 1;
1293 }
1294
1295 add_ptr = strlen(ppp_priv_area->sysname) + 1;
1296 for (i=0; i<userids; i++){
1297 memcpy((mb->data + add_ptr), user_tokens[i],
1298 strlen(user_tokens[i]));
1299 memcpy((mb->data + add_ptr + strlen(user_tokens[i]) + 1),
1300 pass_tokens[i], strlen(pass_tokens[i]));
1301 add_ptr = add_ptr + strlen(user_tokens[i]) + 1 +
1302 strlen(pass_tokens[i]) + 1;
1303 }
1304
1305 mb->cmd.length = add_ptr + 1;
1306 mb->cmd.command = PPP_SET_INBOUND_AUTH;
1307
1308 err = sdla_exec(mb) ? mb->cmd.result : CMD_TIMEOUT;
1309
1310 if (err != CMD_OK)
1311 ppp_error(card, err, mb);
1312
1313 return err;
1314}
1315
1316
1317/*============================================================================
1318 * Tokenize string.
1319 * Parse a string of the following syntax:
1320 * <arg1>,<arg2>,...
1321 * and fill array of tokens with pointers to string elements.
1322 *
1323 */
1324static int tokenize (char *str, char **tokens)
1325{
1326 int cnt = 0;
1327
1328 tokens[0] = strsep(&str, "/");
1329 while (tokens[cnt] && (cnt < 32 - 1))
1330 {
1331 tokens[cnt] = strstrip(tokens[cnt], " \t");
1332 tokens[++cnt] = strsep(&str, "/");
1333 }
1334 return cnt;
1335}
1336
1337/*============================================================================
1338 * Strip leading and trailing spaces off the string str.
1339 */
1340static char* strstrip (char *str, char* s)
1341{
1342 char *eos = str + strlen(str); /* -> end of string */
1343
1344 while (*str && strchr(s, *str))
1345 ++str /* strip leading spaces */
1346 ;
1347 while ((eos > str) && strchr(s, *(eos - 1)))
1348 --eos /* strip trailing spaces */
1349 ;
1350 *eos = '\0';
1351 return str;
1352}
1353/*============================================================================
1354 * Configure PPP firmware.
1355 */
1356static int ppp_configure(sdla_t *card, void *data)
1357{
1358 ppp_mbox_t *mb = card->mbox;
1359 int data_len = sizeof(ppp508_conf_t);
1360 int err;
1361
1362 memset(&mb->cmd, 0, sizeof(ppp_cmd_t));
1363 memcpy(mb->data, data, data_len);
1364 mb->cmd.length = data_len;
1365 mb->cmd.command = PPP_SET_CONFIG;
1366 err = sdla_exec(mb) ? mb->cmd.result : CMD_TIMEOUT;
1367
1368 if (err != CMD_OK)
1369 ppp_error(card, err, mb);
1370
1371 return err;
1372}
1373
1374/*============================================================================
1375 * Set interrupt mode.
1376 */
1377static int ppp_set_intr_mode(sdla_t *card, unsigned char mode)
1378{
1379 ppp_mbox_t *mb = card->mbox;
1380 ppp_intr_info_t *ppp_intr_data = (ppp_intr_info_t *) &mb->data[0];
1381 int err;
1382
1383 memset(&mb->cmd, 0, sizeof(ppp_cmd_t));
1384 ppp_intr_data->i_enable = mode;
1385
1386 ppp_intr_data->irq = card->hw.irq;
1387 mb->cmd.length = 2;
1388
1389 /* If timer has been enabled, set the timer delay to 1sec */
1390 if (mode & 0x80){
1391 ppp_intr_data->timer_len = 250; //5;//100; //250;
1392 mb->cmd.length = 4;
1393 }
1394
1395 mb->cmd.command = PPP_SET_INTR_FLAGS;
1396 err = sdla_exec(mb) ? mb->cmd.result : CMD_TIMEOUT;
1397
1398 if (err != CMD_OK)
1399 ppp_error(card, err, mb);
1400
1401
1402 return err;
1403}
1404
1405/*============================================================================
1406 * Enable communications.
1407 */
1408static int ppp_comm_enable(sdla_t *card)
1409{
1410 ppp_mbox_t *mb = card->mbox;
1411 int err;
1412
1413 memset(&mb->cmd, 0, sizeof(ppp_cmd_t));
1414 mb->cmd.command = PPP_COMM_ENABLE;
1415 err = sdla_exec(mb) ? mb->cmd.result : CMD_TIMEOUT;
1416
1417 if (err != CMD_OK)
1418 ppp_error(card, err, mb);
1419 else
1420 card->u.p.comm_enabled = 1;
1421
1422 return err;
1423}
1424
1425/*============================================================================
1426 * Disable communications.
1427 */
1428static int ppp_comm_disable(sdla_t *card)
1429{
1430 ppp_mbox_t *mb = card->mbox;
1431 int err;
1432
1433 memset(&mb->cmd, 0, sizeof(ppp_cmd_t));
1434 mb->cmd.command = PPP_COMM_DISABLE;
1435 err = sdla_exec(mb) ? mb->cmd.result : CMD_TIMEOUT;
1436 if (err != CMD_OK)
1437 ppp_error(card, err, mb);
1438 else
1439 card->u.p.comm_enabled = 0;
1440
1441 return err;
1442}
1443
1444static int ppp_comm_disable_shutdown(sdla_t *card)
1445{
1446 ppp_mbox_t *mb = card->mbox;
1447 ppp_intr_info_t *ppp_intr_data;
1448 int err;
1449
1450 if (!mb){
1451 return 1;
1452 }
1453
1454 ppp_intr_data = (ppp_intr_info_t *) &mb->data[0];
1455
1456 /* Disable all interrupts */
1457 memset(&mb->cmd, 0, sizeof(ppp_cmd_t));
1458 ppp_intr_data->i_enable = 0;
1459
1460 ppp_intr_data->irq = card->hw.irq;
1461 mb->cmd.length = 2;
1462
1463 mb->cmd.command = PPP_SET_INTR_FLAGS;
1464 err = sdla_exec(mb) ? mb->cmd.result : CMD_TIMEOUT;
1465
1466 /* Disable communicatinons */
1467 memset(&mb->cmd, 0, sizeof(ppp_cmd_t));
1468 mb->cmd.command = PPP_COMM_DISABLE;
1469 err = sdla_exec(mb) ? mb->cmd.result : CMD_TIMEOUT;
1470
1471 card->u.p.comm_enabled = 0;
1472
1473 return 0;
1474}
1475
1476
1477
1478/*============================================================================
1479 * Get communications error statistics.
1480 */
1481static int ppp_get_err_stats(sdla_t *card)
1482{
1483 ppp_mbox_t *mb = card->mbox;
1484 int err;
1485
1486 memset(&mb->cmd, 0, sizeof(ppp_cmd_t));
1487 mb->cmd.command = PPP_READ_ERROR_STATS;
1488 err = sdla_exec(mb) ? mb->cmd.result : CMD_TIMEOUT;
1489
1490 if (err == CMD_OK) {
1491
1492 ppp_err_stats_t* stats = (void*)mb->data;
1493 card->wandev.stats.rx_over_errors = stats->rx_overrun;
1494 card->wandev.stats.rx_crc_errors = stats->rx_bad_crc;
1495 card->wandev.stats.rx_missed_errors = stats->rx_abort;
1496 card->wandev.stats.rx_length_errors = stats->rx_lost;
1497 card->wandev.stats.tx_aborted_errors = stats->tx_abort;
1498
1499 } else
1500 ppp_error(card, err, mb);
1501
1502 return err;
1503}
1504
1505/*============================================================================
1506 * Send packet.
1507 * Return: 0 - o.k.
1508 * 1 - no transmit buffers available
1509 */
1510static int ppp_send (sdla_t *card, void *data, unsigned len, unsigned proto)
1511{
1512 ppp_buf_ctl_t *txbuf = card->u.p.txbuf;
1513
1514 if (txbuf->flag)
1515 return 1;
1516
1517 sdla_poke(&card->hw, txbuf->buf.ptr, data, len);
1518
1519 txbuf->length = len; /* frame length */
1520
1521 if (proto == htons(ETH_P_IPX))
1522 txbuf->proto = 0x01; /* protocol ID */
1523 else
1524 txbuf->proto = 0x00; /* protocol ID */
1525
1526 txbuf->flag = 1; /* start transmission */
1527
1528 /* Update transmit buffer control fields */
1529 card->u.p.txbuf = ++txbuf;
1530
1531 if ((void*)txbuf > card->u.p.txbuf_last)
1532 card->u.p.txbuf = card->u.p.txbuf_base;
1533
1534 return 0;
1535}
1536
1537/****** Firmware Error Handler **********************************************/
1538
1539/*============================================================================
1540 * Firmware error handler.
1541 * This routine is called whenever firmware command returns non-zero
1542 * return code.
1543 *
1544 * Return zero if previous command has to be cancelled.
1545 */
1546static int ppp_error(sdla_t *card, int err, ppp_mbox_t *mb)
1547{
1548 unsigned cmd = mb->cmd.command;
1549
1550 switch (err) {
1551
1552 case CMD_TIMEOUT:
1553 printk(KERN_ERR "%s: command 0x%02X timed out!\n",
1554 card->devname, cmd);
1555 break;
1556
1557 default:
1558 printk(KERN_INFO "%s: command 0x%02X returned 0x%02X!\n"
1559 , card->devname, cmd, err);
1560 }
1561
1562 return 0;
1563}
1564
1565/****** Interrupt Handlers **************************************************/
1566
1567/*============================================================================
1568 * PPP interrupt service routine.
1569 */
1570static void wpp_isr (sdla_t *card)
1571{
1572 ppp_flags_t *flags = card->flags;
1573 char *ptr = &flags->iflag;
1574 struct net_device *dev = card->wandev.dev;
1575 int i;
1576
1577 card->in_isr = 1;
1578 ++card->statistics.isr_entry;
1579
1580 if (!dev && flags->iflag != PPP_INTR_CMD){
1581 card->in_isr = 0;
1582 flags->iflag = 0;
1583 return;
1584 }
1585
1586 if (test_bit(PERI_CRIT, (void*)&card->wandev.critical)) {
1587 card->in_isr = 0;
1588 flags->iflag = 0;
1589 return;
1590 }
1591
1592
1593 if(card->hw.type != SDLA_S514){
1594 if (test_bit(SEND_CRIT, (void*)&card->wandev.critical)) {
1595 ++card->statistics.isr_already_critical;
1596 printk (KERN_INFO "%s: Critical while in ISR!\n",
1597 card->devname);
1598 card->in_isr = 0;
1599 flags->iflag = 0;
1600 return;
1601 }
1602 }
1603
1604 switch (flags->iflag) {
1605
1606 case PPP_INTR_RXRDY: /* receive interrupt 0x01 (bit 0)*/
1607 ++card->statistics.isr_rx;
1608 rx_intr(card);
1609 break;
1610
1611 case PPP_INTR_TXRDY: /* transmit interrupt 0x02 (bit 1)*/
1612 ++card->statistics.isr_tx;
1613 flags->imask &= ~PPP_INTR_TXRDY;
1614 netif_wake_queue(dev);
1615 break;
1616
1617 case PPP_INTR_CMD: /* interface command completed */
1618 ++Intr_test_counter;
1619 ++card->statistics.isr_intr_test;
1620 break;
1621
1622 case PPP_INTR_MODEM: /* modem status change (DCD, CTS) 0x04 (bit 2)*/
1623 case PPP_INTR_DISC: /* Data link disconnected 0x10 (bit 4)*/
1624 case PPP_INTR_OPEN: /* Data link open 0x20 (bit 5)*/
1625 case PPP_INTR_DROP_DTR: /* DTR drop timeout expired 0x40 bit 6 */
1626 event_intr(card);
1627 break;
1628
1629 case PPP_INTR_TIMER:
1630 timer_intr(card);
1631 break;
1632
1633 default: /* unexpected interrupt */
1634 ++card->statistics.isr_spurious;
1635 printk(KERN_INFO "%s: spurious interrupt 0x%02X!\n",
1636 card->devname, flags->iflag);
1637 printk(KERN_INFO "%s: ID Bytes = ",card->devname);
1638 for(i = 0; i < 8; i ++)
1639 printk(KERN_INFO "0x%02X ", *(ptr + 0x28 + i));
1640 printk(KERN_INFO "\n");
1641 }
1642
1643 card->in_isr = 0;
1644 flags->iflag = 0;
1645 return;
1646}
1647
1648/*============================================================================
1649 * Receive interrupt handler.
1650 */
1651static void rx_intr(sdla_t *card)
1652{
1653 ppp_buf_ctl_t *rxbuf = card->rxmb;
1654 struct net_device *dev = card->wandev.dev;
1655 ppp_private_area_t *ppp_priv_area;
1656 struct sk_buff *skb;
1657 unsigned len;
1658 void *buf;
1659 int i;
1660 ppp_flags_t *flags = card->flags;
1661 char *ptr = &flags->iflag;
1662 int udp_type;
1663
1664
1665 if (rxbuf->flag != 0x01) {
1666
1667 printk(KERN_INFO
1668 "%s: corrupted Rx buffer @ 0x%X, flag = 0x%02X!\n",
1669 card->devname, (unsigned)rxbuf, rxbuf->flag);
1670
1671 printk(KERN_INFO "%s: ID Bytes = ",card->devname);
1672
1673 for(i = 0; i < 8; i ++)
1674 printk(KERN_INFO "0x%02X ", *(ptr + 0x28 + i));
1675 printk(KERN_INFO "\n");
1676
1677 ++card->statistics.rx_intr_corrupt_rx_bfr;
1678
1679
1680 /* Bug Fix: Mar 6 2000
1681 * If we get a corrupted mailbox, it means that driver
1682 * is out of sync with the firmware. There is no recovery.
1683 * If we don't turn off all interrupts for this card
1684 * the machine will crash.
1685 */
1686 printk(KERN_INFO "%s: Critical router failure ...!!!\n", card->devname);
1687 printk(KERN_INFO "Please contact Sangoma Technologies !\n");
1688 ppp_set_intr_mode(card,0);
1689 return;
1690 }
1691
1692 if (dev && netif_running(dev) && dev->priv){
1693
1694 len = rxbuf->length;
1695 ppp_priv_area = dev->priv;
1696
1697 /* Allocate socket buffer */
1698 skb = dev_alloc_skb(len);
1699
1700 if (skb != NULL) {
1701
1702 /* Copy data to the socket buffer */
1703 unsigned addr = rxbuf->buf.ptr;
1704
1705 if ((addr + len) > card->u.p.rx_top + 1) {
1706
1707 unsigned tmp = card->u.p.rx_top - addr + 1;
1708 buf = skb_put(skb, tmp);
1709 sdla_peek(&card->hw, addr, buf, tmp);
1710 addr = card->u.p.rx_base;
1711 len -= tmp;
1712 }
1713 buf = skb_put(skb, len);
1714 sdla_peek(&card->hw, addr, buf, len);
1715
1716 /* Decapsulate packet */
1717 switch (rxbuf->proto) {
1718
1719 case 0x00:
1720 skb->protocol = htons(ETH_P_IP);
1721 break;
1722
1723 case 0x01:
1724 skb->protocol = htons(ETH_P_IPX);
1725 break;
1726 }
1727
1728 udp_type = udp_pkt_type( skb, card );
1729
1730 if (udp_type == UDP_PTPIPE_TYPE){
1731
1732 /* Handle a UDP Request in Timer Interrupt */
1733 if(store_udp_mgmt_pkt(UDP_PKT_FRM_NETWORK, card, skb, dev,
1734 ppp_priv_area)){
1735 flags->imask |= PPP_INTR_TIMER;
1736 }
1737 ++ppp_priv_area->rx_intr_stat.rx_intr_PIPE_request;
1738
1739
1740 } else if (handle_IPXWAN(skb->data,card->devname,
1741 ppp_priv_area->enable_IPX,
1742 ppp_priv_area->network_number,
1743 skb->protocol)) {
1744
1745 /* Handle an IPXWAN packet */
1746 if( ppp_priv_area->enable_IPX) {
1747
1748 /* Make sure we are not already sending */
1749 if (!test_bit(SEND_CRIT, &card->wandev.critical)){
1750 ppp_send(card, skb->data, skb->len, htons(ETH_P_IPX));
1751 }
1752 dev_kfree_skb_any(skb);
1753
1754 } else {
1755 ++card->wandev.stats.rx_dropped;
1756 }
1757 } else {
1758 /* Pass data up the protocol stack */
1759 skb->dev = dev;
1760 skb->mac.raw = skb->data;
1761
1762 ++card->wandev.stats.rx_packets;
1763 card->wandev.stats.rx_bytes += skb->len;
1764 ++ppp_priv_area->rx_intr_stat.rx_intr_bfr_passed_to_stack;
1765 netif_rx(skb);
1766 dev->last_rx = jiffies;
1767 }
1768
1769 } else {
1770
1771 if (net_ratelimit()){
1772 printk(KERN_INFO "%s: no socket buffers available!\n",
1773 card->devname);
1774 }
1775 ++card->wandev.stats.rx_dropped;
1776 ++ppp_priv_area->rx_intr_stat.rx_intr_no_socket;
1777 }
1778
1779 } else {
1780 ++card->statistics.rx_intr_dev_not_started;
1781 }
1782
1783 /* Release buffer element and calculate a pointer to the next one */
1784 rxbuf->flag = 0x00;
1785 card->rxmb = ++rxbuf;
1786 if ((void*)rxbuf > card->u.p.rxbuf_last)
1787 card->rxmb = card->u.p.rxbuf_base;
1788}
1789
1790
1791void event_intr (sdla_t *card)
1792{
1793
1794 struct net_device* dev = card->wandev.dev;
1795 ppp_private_area_t* ppp_priv_area = dev->priv;
1796 volatile ppp_flags_t *flags = card->flags;
1797
1798 switch (flags->iflag){
1799
1800 case PPP_INTR_MODEM: /* modem status change (DCD, CTS) 0x04 (bit 2)*/
1801
1802 if (net_ratelimit()){
1803 printk (KERN_INFO "%s: Modem status: DCD=%s CTS=%s\n",
1804 card->devname, DCD(flags->mstatus), CTS(flags->mstatus));
1805 }
1806 break;
1807
1808 case PPP_INTR_DISC: /* Data link disconnected 0x10 (bit 4)*/
1809
1810 NEX_PRINTK (KERN_INFO "Data link disconnected intr Cause %X\n",
1811 flags->disc_cause);
1812
1813 if (flags->disc_cause &
1814 (PPP_LOCAL_TERMINATION | PPP_DCD_CTS_DROP |
1815 PPP_REMOTE_TERMINATION)) {
1816
1817 if (card->u.p.ip_mode == WANOPT_PPP_PEER) {
1818 set_bit(0,&Read_connection_info);
1819 }
1820 wanpipe_set_state(card, WAN_DISCONNECTED);
1821
1822 show_disc_cause(card, flags->disc_cause);
1823 ppp_priv_area->timer_int_enabled |= TMR_INT_ENABLED_PPP_EVENT;
1824 flags->imask |= PPP_INTR_TIMER;
1825 trigger_ppp_poll(dev);
1826 }
1827 break;
1828
1829 case PPP_INTR_OPEN: /* Data link open 0x20 (bit 5)*/
1830
1831 NEX_PRINTK (KERN_INFO "%s: PPP Link Open, LCP=%s IP=%s\n",
1832 card->devname,LCP(flags->lcp_state),
1833 IP(flags->ip_state));
1834
1835 if (flags->lcp_state == 0x09 &&
1836 (flags->ip_state == 0x09 || flags->ipx_state == 0x09)){
1837
1838 /* Initialize the polling timer and set the state
1839 * to WAN_CONNNECTED */
1840
1841
1842 /* BUG FIX: When the protocol restarts, during heavy
1843 * traffic, board tx buffers and driver tx buffers
1844 * can go out of sync. This checks the condition
1845 * and if the tx buffers are out of sync, the
1846 * protocols are restarted.
1847 * I don't know why the board tx buffer is out
1848 * of sync. It could be that a packets is tx
1849 * while the link is down, but that is not
1850 * possible. The other possiblility is that the
1851 * firmware doesn't reinitialize properly.
1852 * FIXME: A better fix should be found.
1853 */
1854 if (detect_and_fix_tx_bug(card)){
1855
1856 ppp_comm_disable(card);
1857
1858 wanpipe_set_state(card, WAN_DISCONNECTED);
1859
1860 ppp_priv_area->timer_int_enabled |=
1861 TMR_INT_ENABLED_PPP_EVENT;
1862 flags->imask |= PPP_INTR_TIMER;
1863 break;
1864 }
1865
1866 card->state_tick = jiffies;
1867 wanpipe_set_state(card, WAN_CONNECTED);
1868
1869 NEX_PRINTK(KERN_INFO "CON: L Tx: %lx B Tx: %lx || L Rx %lx B Rx %lx\n",
1870 (unsigned long)card->u.p.txbuf, *card->u.p.txbuf_next,
1871 (unsigned long)card->rxmb, *card->u.p.rxbuf_next);
1872
1873 /* Tell timer interrupt that PPP event occurred */
1874 ppp_priv_area->timer_int_enabled |= TMR_INT_ENABLED_PPP_EVENT;
1875 flags->imask |= PPP_INTR_TIMER;
1876
1877 /* If we are in PEER mode, we must first obtain the
1878 * IP information and then go into the poll routine */
1879 if (card->u.p.ip_mode != WANOPT_PPP_PEER){
1880 trigger_ppp_poll(dev);
1881 }
1882 }
1883 break;
1884
1885 case PPP_INTR_DROP_DTR: /* DTR drop timeout expired 0x40 bit 6 */
1886
1887 NEX_PRINTK(KERN_INFO "DTR Drop Timeout Interrrupt \n");
1888
1889 if (card->u.p.ip_mode == WANOPT_PPP_PEER) {
1890 set_bit(0,&Read_connection_info);
1891 }
1892
1893 wanpipe_set_state(card, WAN_DISCONNECTED);
1894
1895 show_disc_cause(card, flags->disc_cause);
1896 ppp_priv_area->timer_int_enabled |= TMR_INT_ENABLED_PPP_EVENT;
1897 flags->imask |= PPP_INTR_TIMER;
1898 trigger_ppp_poll(dev);
1899 break;
1900
1901 default:
1902 printk(KERN_INFO "%s: Error, Invalid PPP Event\n",card->devname);
1903 }
1904}
1905
1906
1907
1908/* TIMER INTERRUPT */
1909
1910void timer_intr (sdla_t *card)
1911{
1912
1913 struct net_device* dev = card->wandev.dev;
1914 ppp_private_area_t* ppp_priv_area = dev->priv;
1915 ppp_flags_t *flags = card->flags;
1916
1917
1918 if (ppp_priv_area->timer_int_enabled & TMR_INT_ENABLED_CONFIG){
1919 if (!config_ppp(card)){
1920 ppp_priv_area->timer_int_enabled &=
1921 ~TMR_INT_ENABLED_CONFIG;
1922 }
1923 }
1924
1925 /* Update statistics */
1926 if (ppp_priv_area->timer_int_enabled & TMR_INT_ENABLED_UPDATE){
1927 ppp_get_err_stats(card);
1928 if(!(--ppp_priv_area->update_comms_stats)){
1929 ppp_priv_area->timer_int_enabled &=
1930 ~TMR_INT_ENABLED_UPDATE;
1931 }
1932 }
1933
1934 /* PPIPEMON UDP request */
1935
1936 if (ppp_priv_area->timer_int_enabled & TMR_INT_ENABLED_UDP){
1937 process_udp_mgmt_pkt(card,dev, ppp_priv_area);
1938 ppp_priv_area->timer_int_enabled &= ~TMR_INT_ENABLED_UDP;
1939 }
1940
1941 /* PPP Event */
1942 if (ppp_priv_area->timer_int_enabled & TMR_INT_ENABLED_PPP_EVENT){
1943
1944 if (card->wandev.state == WAN_DISCONNECTED){
1945 retrigger_comm(card);
1946 }
1947
1948 /* If the state is CONNECTING, it means that communicatins were
1949 * enabled. When the remote side enables its comminication we
1950 * should get an interrupt PPP_INTR_OPEN, thus turn off polling
1951 */
1952
1953 else if (card->wandev.state == WAN_CONNECTING){
1954 /* Turn off the timer interrupt */
1955 ppp_priv_area->timer_int_enabled &= ~TMR_INT_ENABLED_PPP_EVENT;
1956 }
1957
1958 /* If state is connected and we are in PEER mode
1959 * poll for an IP address which will be provided by remote end.
1960 */
1961 else if ((card->wandev.state == WAN_CONNECTED &&
1962 card->u.p.ip_mode == WANOPT_PPP_PEER) &&
1963 test_bit(0,&Read_connection_info)){
1964
1965 card->state_tick = jiffies;
1966 if (read_connection_info (card)){
1967 printk(KERN_INFO "%s: Failed to read PEER IP Addresses\n",
1968 card->devname);
1969 }else{
1970 clear_bit(0,&Read_connection_info);
1971 set_bit(1,&Read_connection_info);
1972 trigger_ppp_poll(dev);
1973 }
1974 }else{
1975 //FIXME Put the comment back int
1976 ppp_priv_area->timer_int_enabled &= ~TMR_INT_ENABLED_PPP_EVENT;
1977 }
1978
1979 }/* End of PPP_EVENT */
1980
1981
1982 /* Only disable the timer interrupt if there are no udp, statistic */
1983 /* updates or events pending */
1984 if(!ppp_priv_area->timer_int_enabled) {
1985 flags->imask &= ~PPP_INTR_TIMER;
1986 }
1987}
1988
1989
1990static int handle_IPXWAN(unsigned char *sendpacket, char *devname, unsigned char enable_IPX, unsigned long network_number, unsigned short proto)
1991{
1992 int i;
1993
1994 if( proto == htons(ETH_P_IPX) ) {
1995 //It's an IPX packet
1996 if(!enable_IPX) {
1997 //Return 1 so we don't pass it up the stack.
1998 return 1;
1999 }
2000 } else {
2001 //It's not IPX so pass it up the stack.
2002 return 0;
2003 }
2004
2005 if( sendpacket[16] == 0x90 &&
2006 sendpacket[17] == 0x04)
2007 {
2008 //It's IPXWAN
2009
2010 if( sendpacket[2] == 0x02 &&
2011 sendpacket[34] == 0x00)
2012 {
2013 //It's a timer request packet
2014 printk(KERN_INFO "%s: Received IPXWAN Timer Request packet\n",devname);
2015
2016 //Go through the routing options and answer no to every
2017 //option except Unnumbered RIP/SAP
2018 for(i = 41; sendpacket[i] == 0x00; i += 5)
2019 {
2020 //0x02 is the option for Unnumbered RIP/SAP
2021 if( sendpacket[i + 4] != 0x02)
2022 {
2023 sendpacket[i + 1] = 0;
2024 }
2025 }
2026
2027 //Skip over the extended Node ID option
2028 if( sendpacket[i] == 0x04 )
2029 {
2030 i += 8;
2031 }
2032
2033 //We also want to turn off all header compression opt.
2034 for(; sendpacket[i] == 0x80 ;)
2035 {
2036 sendpacket[i + 1] = 0;
2037 i += (sendpacket[i + 2] << 8) + (sendpacket[i + 3]) + 4;
2038 }
2039
2040 //Set the packet type to timer response
2041 sendpacket[34] = 0x01;
2042
2043 printk(KERN_INFO "%s: Sending IPXWAN Timer Response\n",devname);
2044 }
2045 else if( sendpacket[34] == 0x02 )
2046 {
2047 //This is an information request packet
2048 printk(KERN_INFO "%s: Received IPXWAN Information Request packet\n",devname);
2049
2050 //Set the packet type to information response
2051 sendpacket[34] = 0x03;
2052
2053 //Set the router name
2054 sendpacket[51] = 'P';
2055 sendpacket[52] = 'T';
2056 sendpacket[53] = 'P';
2057 sendpacket[54] = 'I';
2058 sendpacket[55] = 'P';
2059 sendpacket[56] = 'E';
2060 sendpacket[57] = '-';
2061 sendpacket[58] = CVHexToAscii(network_number >> 28);
2062 sendpacket[59] = CVHexToAscii((network_number & 0x0F000000)>> 24);
2063 sendpacket[60] = CVHexToAscii((network_number & 0x00F00000)>> 20);
2064 sendpacket[61] = CVHexToAscii((network_number & 0x000F0000)>> 16);
2065 sendpacket[62] = CVHexToAscii((network_number & 0x0000F000)>> 12);
2066 sendpacket[63] = CVHexToAscii((network_number & 0x00000F00)>> 8);
2067 sendpacket[64] = CVHexToAscii((network_number & 0x000000F0)>> 4);
2068 sendpacket[65] = CVHexToAscii(network_number & 0x0000000F);
2069 for(i = 66; i < 99; i+= 1)
2070 {
2071 sendpacket[i] = 0;
2072 }
2073
2074 printk(KERN_INFO "%s: Sending IPXWAN Information Response packet\n",devname);
2075 }
2076 else
2077 {
2078 printk(KERN_INFO "%s: Unknown IPXWAN packet!\n",devname);
2079 return 0;
2080 }
2081
2082 //Set the WNodeID to our network address
2083 sendpacket[35] = (unsigned char)(network_number >> 24);
2084 sendpacket[36] = (unsigned char)((network_number & 0x00FF0000) >> 16);
2085 sendpacket[37] = (unsigned char)((network_number & 0x0000FF00) >> 8);
2086 sendpacket[38] = (unsigned char)(network_number & 0x000000FF);
2087
2088 return 1;
2089 } else {
2090 //If we get here it's an IPX-data packet, so it'll get passed up the stack.
2091
2092 //switch the network numbers
2093 switch_net_numbers(sendpacket, network_number, 1);
2094 return 0;
2095 }
2096}
2097
2098/****** Background Polling Routines ****************************************/
2099
2100/* All polling functions are invoked by the TIMER interrupt in the wpp_isr
2101 * routine.
2102 */
2103
2104/*============================================================================
2105 * Monitor active link phase.
2106 */
2107static void process_route (sdla_t *card)
2108{
2109 ppp_flags_t *flags = card->flags;
2110 struct net_device *dev = card->wandev.dev;
2111 ppp_private_area_t *ppp_priv_area = dev->priv;
2112
2113 if ((card->u.p.ip_mode == WANOPT_PPP_PEER) &&
2114 (flags->ip_state == 0x09)){
2115
2116 /* We get ip_local from the firmware in PEER mode.
2117 * Therefore, if ip_local is 0, we failed to obtain
2118 * the remote IP address. */
2119 if (ppp_priv_area->ip_local == 0)
2120 return;
2121
2122 printk(KERN_INFO "%s: IPCP State Opened.\n", card->devname);
2123 if (read_info( card )) {
2124 printk(KERN_INFO
2125 "%s: An error occurred in IP assignment.\n",
2126 card->devname);
2127 } else {
2128 struct in_device *in_dev = dev->ip_ptr;
2129 if (in_dev != NULL ) {
2130 struct in_ifaddr *ifa = in_dev->ifa_list;
2131
2132 printk(KERN_INFO "%s: Assigned Lcl. Addr: %u.%u.%u.%u\n",
2133 card->devname, NIPQUAD(ifa->ifa_local));
2134 printk(KERN_INFO "%s: Assigned Rmt. Addr: %u.%u.%u.%u\n",
2135 card->devname, NIPQUAD(ifa->ifa_address));
2136 }else{
2137 printk(KERN_INFO
2138 "%s: Error: Failed to add a route for PPP interface %s\n",
2139 card->devname,dev->name);
2140 }
2141 }
2142 }
2143}
2144
2145/*============================================================================
2146 * Monitor physical link disconnected phase.
2147 * o if interface is up and the hold-down timeout has expired, then retry
2148 * connection.
2149 */
2150static void retrigger_comm(sdla_t *card)
2151{
2152 struct net_device *dev = card->wandev.dev;
2153
2154 if (dev && ((jiffies - card->state_tick) > HOLD_DOWN_TIME)) {
2155
2156 wanpipe_set_state(card, WAN_CONNECTING);
2157
2158 if(ppp_comm_enable(card) == CMD_OK){
2159 init_ppp_tx_rx_buff( card );
2160 }
2161 }
2162}
2163
2164/****** Miscellaneous Functions *********************************************/
2165
2166/*============================================================================
2167 * Configure S508 adapter.
2168 */
2169static int config508(struct net_device *dev, sdla_t *card)
2170{
2171 ppp508_conf_t cfg;
2172 struct in_device *in_dev = dev->ip_ptr;
2173 ppp_private_area_t *ppp_priv_area = dev->priv;
2174
2175 /* Prepare PPP configuration structure */
2176 memset(&cfg, 0, sizeof(ppp508_conf_t));
2177
2178 if (card->wandev.clocking)
2179 cfg.line_speed = card->wandev.bps;
2180
2181 if (card->wandev.interface == WANOPT_RS232)
2182 cfg.conf_flags |= INTERFACE_LEVEL_RS232;
2183
2184
2185 cfg.conf_flags |= DONT_TERMINATE_LNK_MAX_CONFIG; /*send Configure-Request packets forever*/
2186 cfg.txbuf_percent = PERCENT_TX_BUFF; /* % of Tx bufs */
2187 cfg.mtu_local = card->wandev.mtu;
2188 cfg.mtu_remote = card->wandev.mtu; /* Default */
2189 cfg.restart_tmr = TIME_BETWEEN_CONF_REQ; /* 30 = 3sec */
2190 cfg.auth_rsrt_tmr = TIME_BETWEEN_PAP_CHAP_REQ; /* 30 = 3sec */
2191 cfg.auth_wait_tmr = WAIT_PAP_CHAP_WITHOUT_REPLY; /* 300 = 30s */
2192 cfg.mdm_fail_tmr = WAIT_AFTER_DCD_CTS_LOW; /* 5 = 0.5s */
2193 cfg.dtr_drop_tmr = TIME_DCD_CTS_LOW_AFTER_LNK_DOWN; /* 10 = 1s */
2194 cfg.connect_tmout = WAIT_DCD_HIGH_AFTER_ENABLE_COMM; /* 900 = 90s */
2195 cfg.conf_retry = MAX_CONF_REQ_WITHOUT_REPLY; /* 10 = 1s */
2196 cfg.term_retry = MAX_TERM_REQ_WITHOUT_REPLY; /* 2 times */
2197 cfg.fail_retry = NUM_CONF_NAK_WITHOUT_REPLY; /* 5 times */
2198 cfg.auth_retry = NUM_AUTH_REQ_WITHOUT_REPLY; /* 10 times */
2199
2200
2201 if( !card->u.p.authenticator ) {
2202 printk(KERN_INFO "%s: Device is not configured as an authenticator\n",
2203 card->devname);
2204 cfg.auth_options = NO_AUTHENTICATION;
2205 }else{
2206 printk(KERN_INFO "%s: Device is configured as an authenticator\n",
2207 card->devname);
2208 cfg.auth_options = INBOUND_AUTH;
2209 }
2210
2211 if( ppp_priv_area->pap == WANOPT_YES){
2212 cfg.auth_options |=PAP_AUTH;
2213 printk(KERN_INFO "%s: Pap enabled\n", card->devname);
2214 }
2215 if( ppp_priv_area->chap == WANOPT_YES){
2216 cfg.auth_options |= CHAP_AUTH;
2217 printk(KERN_INFO "%s: Chap enabled\n", card->devname);
2218 }
2219
2220
2221 if (ppp_priv_area->enable_IPX == WANOPT_YES){
2222 printk(KERN_INFO "%s: Enabling IPX Protocol\n",card->devname);
2223 cfg.ipx_options = ENABLE_IPX | ROUTING_PROT_DEFAULT;
2224 }else{
2225 cfg.ipx_options = DISABLE_IPX;
2226 }
2227
2228 switch (card->u.p.ip_mode) {
2229
2230 case WANOPT_PPP_STATIC:
2231
2232 printk(KERN_INFO "%s: PPP IP Mode: STATIC\n",card->devname);
2233 cfg.ip_options = L_AND_R_IP_NO_ASSIG |
2234 ENABLE_IP;
2235 cfg.ip_local = in_dev->ifa_list->ifa_local;
2236 cfg.ip_remote = in_dev->ifa_list->ifa_address;
2237 /* Debugging code used to check that IP addresses
2238 * obtained from the kernel are correct */
2239
2240 NEX_PRINTK(KERN_INFO "Local %u.%u.%u.%u Remote %u.%u.%u.%u Name %s\n",
2241 NIPQUAD(ip_local),NIPQUAD(ip_remote), dev->name);
2242 break;
2243
2244 case WANOPT_PPP_HOST:
2245
2246 printk(KERN_INFO "%s: PPP IP Mode: HOST\n",card->devname);
2247 cfg.ip_options = L_IP_LOCAL_ASSIG |
2248 R_IP_LOCAL_ASSIG |
2249 ENABLE_IP;
2250 cfg.ip_local = in_dev->ifa_list->ifa_local;
2251 cfg.ip_remote = in_dev->ifa_list->ifa_address;
2252 /* Debugging code used to check that IP addresses
2253 * obtained from the kernel are correct */
2254 NEX_PRINTK (KERN_INFO "Local %u.%u.%u.%u Remote %u.%u.%u.%u Name %s\n",
2255 NIPQUAD(ip_local),NIPQUAD(ip_remote), dev->name);
2256
2257 break;
2258
2259 case WANOPT_PPP_PEER:
2260
2261 printk(KERN_INFO "%s: PPP IP Mode: PEER\n",card->devname);
2262 cfg.ip_options = L_IP_REMOTE_ASSIG |
2263 R_IP_REMOTE_ASSIG |
2264 ENABLE_IP;
2265 cfg.ip_local = 0x00;
2266 cfg.ip_remote = 0x00;
2267 break;
2268
2269 default:
2270 printk(KERN_INFO "%s: ERROR: Unsupported PPP Mode Selected\n",
2271 card->devname);
2272 printk(KERN_INFO "%s: PPP IP Modes: STATIC, PEER or HOST\n",
2273 card->devname);
2274 return 1;
2275 }
2276
2277 return ppp_configure(card, &cfg);
2278}
2279
2280/*============================================================================
2281 * Show disconnection cause.
2282 */
2283static void show_disc_cause(sdla_t *card, unsigned cause)
2284{
2285 if (cause & 0x0802)
2286
2287 printk(KERN_INFO "%s: link terminated by peer\n",
2288 card->devname);
2289
2290 else if (cause & 0x0004)
2291
2292 printk(KERN_INFO "%s: link terminated by user\n",
2293 card->devname);
2294
2295 else if (cause & 0x0008)
2296
2297 printk(KERN_INFO "%s: authentication failed\n", card->devname);
2298
2299 else if (cause & 0x0010)
2300
2301 printk(KERN_INFO
2302 "%s: authentication protocol negotiation failed\n",
2303 card->devname);
2304
2305 else if (cause & 0x0020)
2306
2307 printk(KERN_INFO
2308 "%s: peer's request for authentication rejected\n",
2309 card->devname);
2310
2311 else if (cause & 0x0040)
2312
2313 printk(KERN_INFO "%s: MRU option rejected by peer\n",
2314 card->devname);
2315
2316 else if (cause & 0x0080)
2317
2318 printk(KERN_INFO "%s: peer's MRU was too small\n",
2319 card->devname);
2320
2321 else if (cause & 0x0100)
2322
2323 printk(KERN_INFO "%s: failed to negotiate peer's LCP options\n",
2324 card->devname);
2325
2326 else if (cause & 0x0200)
2327
2328 printk(KERN_INFO "%s: failed to negotiate peer's IPCP options\n"
2329 , card->devname);
2330
2331 else if (cause & 0x0400)
2332
2333 printk(KERN_INFO
2334 "%s: failed to negotiate peer's IPXCP options\n",
2335 card->devname);
2336}
2337
2338/*=============================================================================
2339 * Process UDP call of type PTPIPEAB.
2340 */
2341static void process_udp_mgmt_pkt(sdla_t *card, struct net_device *dev,
2342 ppp_private_area_t *ppp_priv_area )
2343{
2344 unsigned char buf2[5];
2345 unsigned char *buf;
2346 unsigned int frames, len;
2347 struct sk_buff *new_skb;
2348 unsigned short data_length, buffer_length, real_len;
2349 unsigned long data_ptr;
2350 int udp_mgmt_req_valid = 1;
2351 ppp_mbox_t *mbox = card->mbox;
2352 struct timeval tv;
2353 int err;
2354 ppp_udp_pkt_t *ppp_udp_pkt = (ppp_udp_pkt_t*)&ppp_priv_area->udp_pkt_data;
2355
2356 memcpy(&buf2, &card->wandev.udp_port, 2 );
2357
2358
2359 if(ppp_priv_area->udp_pkt_src == UDP_PKT_FRM_NETWORK) {
2360
2361 switch(ppp_udp_pkt->cblock.command) {
2362
2363 case PPIPE_GET_IBA_DATA:
2364 case PPP_READ_CONFIG:
2365 case PPP_GET_CONNECTION_INFO:
2366 case PPIPE_ROUTER_UP_TIME:
2367 case PPP_READ_STATISTICS:
2368 case PPP_READ_ERROR_STATS:
2369 case PPP_READ_PACKET_STATS:
2370 case PPP_READ_LCP_STATS:
2371 case PPP_READ_IPCP_STATS:
2372 case PPP_READ_IPXCP_STATS:
2373 case PPP_READ_PAP_STATS:
2374 case PPP_READ_CHAP_STATS:
2375 case PPP_READ_CODE_VERSION:
2376 udp_mgmt_req_valid = 1;
2377 break;
2378
2379 default:
2380 udp_mgmt_req_valid = 0;
2381 break;
2382 }
2383 }
2384
2385 if(!udp_mgmt_req_valid) {
2386
2387 /* set length to 0 */
2388 ppp_udp_pkt->cblock.length = 0x00;
2389
2390 /* set return code */
2391 ppp_udp_pkt->cblock.result = 0xCD;
2392 ++ppp_priv_area->pipe_mgmt_stat.UDP_PIPE_mgmt_direction_err;
2393
2394 if (net_ratelimit()){
2395 printk(KERN_INFO
2396 "%s: Warning, Illegal UDP command attempted from network: %x\n",
2397 card->devname,ppp_udp_pkt->cblock.command);
2398 }
2399 } else {
2400 /* Initialize the trace element */
2401 trace_element_t trace_element;
2402
2403 switch (ppp_udp_pkt->cblock.command){
2404
2405 /* PPIPE_ENABLE_TRACING */
2406 case PPIPE_ENABLE_TRACING:
2407 if (!card->TracingEnabled) {
2408
2409 /* OPERATE_DATALINE_MONITOR */
2410 mbox->cmd.command = PPP_DATALINE_MONITOR;
2411 mbox->cmd.length = 0x01;
2412 mbox->data[0] = ppp_udp_pkt->data[0];
2413 err = sdla_exec(mbox) ?
2414 mbox->cmd.result : CMD_TIMEOUT;
2415
2416 if (err != CMD_OK) {
2417
2418 ppp_error(card, err, mbox);
2419 card->TracingEnabled = 0;
2420
2421 /* set the return code */
2422
2423 ppp_udp_pkt->cblock.result = mbox->cmd.result;
2424 mbox->cmd.length = 0;
2425 break;
2426 }
2427
2428 sdla_peek(&card->hw, 0xC000, &buf2, 2);
2429
2430 ppp_priv_area->curr_trace_addr = 0;
2431 memcpy(&ppp_priv_area->curr_trace_addr, &buf2, 2);
2432 ppp_priv_area->start_trace_addr =
2433 ppp_priv_area->curr_trace_addr;
2434 ppp_priv_area->end_trace_addr =
2435 ppp_priv_area->start_trace_addr + END_OFFSET;
2436
2437 /* MAX_SEND_BUFFER_SIZE - 28 (IP header)
2438 - 32 (ppipemon CBLOCK) */
2439 available_buffer_space = MAX_LGTH_UDP_MGNT_PKT -
2440 sizeof(ip_pkt_t)-
2441 sizeof(udp_pkt_t)-
2442 sizeof(wp_mgmt_t)-
2443 sizeof(cblock_t);
2444 }
2445 ppp_udp_pkt->cblock.result = 0;
2446 mbox->cmd.length = 0;
2447 card->TracingEnabled = 1;
2448 break;
2449
2450 /* PPIPE_DISABLE_TRACING */
2451 case PPIPE_DISABLE_TRACING:
2452
2453 if(card->TracingEnabled) {
2454
2455 /* OPERATE_DATALINE_MONITOR */
2456 mbox->cmd.command = 0x33;
2457 mbox->cmd.length = 1;
2458 mbox->data[0] = 0x00;
2459 err = sdla_exec(mbox) ?
2460 mbox->cmd.result : CMD_TIMEOUT;
2461
2462 }
2463
2464 /*set return code*/
2465 ppp_udp_pkt->cblock.result = 0;
2466 mbox->cmd.length = 0;
2467 card->TracingEnabled = 0;
2468 break;
2469
2470 /* PPIPE_GET_TRACE_INFO */
2471 case PPIPE_GET_TRACE_INFO:
2472
2473 if(!card->TracingEnabled) {
2474 /* set return code */
2475 ppp_udp_pkt->cblock.result = 1;
2476 mbox->cmd.length = 0;
2477 }
2478
2479 buffer_length = 0;
2480
2481 /* frames < 62, where 62 is the number of trace
2482 information elements. There is in total 496
2483 bytes of space and each trace information
2484 element is 8 bytes.
2485 */
2486 for ( frames=0; frames<62; frames++) {
2487
2488 trace_pkt_t *trace_pkt = (trace_pkt_t *)
2489 &ppp_udp_pkt->data[buffer_length];
2490
2491 /* Read the whole trace packet */
2492 sdla_peek(&card->hw, ppp_priv_area->curr_trace_addr,
2493 &trace_element, sizeof(trace_element_t));
2494
2495 /* no data on board so exit */
2496 if( trace_element.opp_flag == 0x00 )
2497 break;
2498
2499 data_ptr = trace_element.trace_data_ptr;
2500
2501 /* See if there is actual data on the trace buffer */
2502 if (data_ptr){
2503 data_length = trace_element.trace_length;
2504 }else{
2505 data_length = 0;
2506 ppp_udp_pkt->data[0] |= 0x02;
2507 }
2508
2509 //FIXME: Do we need this check
2510 if ((available_buffer_space - buffer_length)
2511 < (sizeof(trace_element_t)+1)){
2512
2513 /*indicate we have more frames
2514 * on board and exit
2515 */
2516 ppp_udp_pkt->data[0] |= 0x02;
2517 break;
2518 }
2519
2520 trace_pkt->status = trace_element.trace_type;
2521 trace_pkt->time_stamp = trace_element.trace_time_stamp;
2522 trace_pkt->real_length = trace_element.trace_length;
2523
2524 real_len = trace_element.trace_length;
2525
2526 if(data_ptr == 0){
2527 trace_pkt->data_avail = 0x00;
2528 }else{
2529 /* we can take it next time */
2530 if ((available_buffer_space - buffer_length)<
2531 (real_len + sizeof(trace_pkt_t))){
2532
2533 ppp_udp_pkt->data[0] |= 0x02;
2534 break;
2535 }
2536 trace_pkt->data_avail = 0x01;
2537
2538 /* get the data */
2539 sdla_peek(&card->hw, data_ptr,
2540 &trace_pkt->data,
2541 real_len);
2542 }
2543 /* zero the opp flag to
2544 show we got the frame */
2545 buf2[0] = 0x00;
2546 sdla_poke(&card->hw, ppp_priv_area->curr_trace_addr,
2547 &buf2, 1);
2548
2549 /* now move onto the next
2550 frame */
2551 ppp_priv_area->curr_trace_addr += 8;
2552
2553 /* check if we passed the last address */
2554 if ( ppp_priv_area->curr_trace_addr >=
2555 ppp_priv_area->end_trace_addr){
2556
2557 ppp_priv_area->curr_trace_addr =
2558 ppp_priv_area->start_trace_addr;
2559 }
2560
2561 /* update buffer length and make sure its even */
2562
2563 if ( trace_pkt->data_avail == 0x01 ) {
2564 buffer_length += real_len - 1;
2565 }
2566
2567 /* for the header */
2568 buffer_length += 8;
2569
2570 if( buffer_length & 0x0001 )
2571 buffer_length += 1;
2572 }
2573
2574 /* ok now set the total number of frames passed
2575 in the high 5 bits */
2576 ppp_udp_pkt->data[0] |= (frames << 2);
2577
2578 /* set the data length */
2579 mbox->cmd.length = buffer_length;
2580 ppp_udp_pkt->cblock.length = buffer_length;
2581
2582 /* set return code */
2583 ppp_udp_pkt->cblock.result = 0;
2584 break;
2585
2586 /* PPIPE_GET_IBA_DATA */
2587 case PPIPE_GET_IBA_DATA:
2588
2589 mbox->cmd.length = 0x09;
2590
2591 sdla_peek(&card->hw, 0xF003, &ppp_udp_pkt->data,
2592 mbox->cmd.length);
2593
2594 /* set the length of the data */
2595 ppp_udp_pkt->cblock.length = 0x09;
2596
2597 /* set return code */
2598 ppp_udp_pkt->cblock.result = 0x00;
2599 ppp_udp_pkt->cblock.result = 0;
2600 break;
2601
2602 /* PPIPE_FT1_READ_STATUS */
2603 case PPIPE_FT1_READ_STATUS:
2604 sdla_peek(&card->hw, 0xF020, &ppp_udp_pkt->data[0], 2);
2605 ppp_udp_pkt->cblock.length = mbox->cmd.length = 2;
2606 ppp_udp_pkt->cblock.result = 0;
2607 break;
2608
2609 case PPIPE_FLUSH_DRIVER_STATS:
2610 init_ppp_priv_struct( ppp_priv_area );
2611 init_global_statistics( card );
2612 mbox->cmd.length = 0;
2613 ppp_udp_pkt->cblock.result = 0;
2614 break;
2615
2616
2617 case PPIPE_ROUTER_UP_TIME:
2618
2619 do_gettimeofday( &tv );
2620 ppp_priv_area->router_up_time = tv.tv_sec -
2621 ppp_priv_area->router_start_time;
2622 *(unsigned long *)&ppp_udp_pkt->data = ppp_priv_area->router_up_time;
2623 mbox->cmd.length = 4;
2624 ppp_udp_pkt->cblock.result = 0;
2625 break;
2626
2627 /* PPIPE_DRIVER_STATISTICS */
2628 case PPIPE_DRIVER_STAT_IFSEND:
2629 memcpy(&ppp_udp_pkt->data, &ppp_priv_area->if_send_stat,
2630 sizeof(if_send_stat_t));
2631
2632
2633 ppp_udp_pkt->cblock.result = 0;
2634 ppp_udp_pkt->cblock.length = sizeof(if_send_stat_t);
2635 mbox->cmd.length = sizeof(if_send_stat_t);
2636 break;
2637
2638 case PPIPE_DRIVER_STAT_INTR:
2639 memcpy(&ppp_udp_pkt->data, &card->statistics,
2640 sizeof(global_stats_t));
2641
2642 memcpy(&ppp_udp_pkt->data+sizeof(global_stats_t),
2643 &ppp_priv_area->rx_intr_stat,
2644 sizeof(rx_intr_stat_t));
2645
2646 ppp_udp_pkt->cblock.result = 0;
2647 ppp_udp_pkt->cblock.length = sizeof(global_stats_t)+
2648 sizeof(rx_intr_stat_t);
2649 mbox->cmd.length = ppp_udp_pkt->cblock.length;
2650 break;
2651
2652 case PPIPE_DRIVER_STAT_GEN:
2653 memcpy( &ppp_udp_pkt->data,
2654 &ppp_priv_area->pipe_mgmt_stat,
2655 sizeof(pipe_mgmt_stat_t));
2656
2657 memcpy(&ppp_udp_pkt->data+sizeof(pipe_mgmt_stat_t),
2658 &card->statistics, sizeof(global_stats_t));
2659
2660 ppp_udp_pkt->cblock.result = 0;
2661 ppp_udp_pkt->cblock.length = sizeof(global_stats_t)+
2662 sizeof(rx_intr_stat_t);
2663 mbox->cmd.length = ppp_udp_pkt->cblock.length;
2664 break;
2665
2666
2667 /* FT1 MONITOR STATUS */
2668 case FT1_MONITOR_STATUS_CTRL:
2669
2670 /* Enable FT1 MONITOR STATUS */
2671 if( ppp_udp_pkt->data[0] == 1) {
2672
2673 if( rCount++ != 0 ) {
2674 ppp_udp_pkt->cblock.result = 0;
2675 mbox->cmd.length = 1;
2676 break;
2677 }
2678 }
2679
2680 /* Disable FT1 MONITOR STATUS */
2681 if( ppp_udp_pkt->data[0] == 0) {
2682
2683 if( --rCount != 0) {
2684 ppp_udp_pkt->cblock.result = 0;
2685 mbox->cmd.length = 1;
2686 break;
2687 }
2688 }
2689 goto udp_dflt_cmd;
2690
2691 /* WARNING: FIXME: This should be fixed.
2692 * The FT1 Status Ctrl doesn't have a break
2693 * statment. Thus, no code must be inserted
2694 * HERE: between default and above case statement */
2695
2696 default:
2697udp_dflt_cmd:
2698
2699 /* it's a board command */
2700 mbox->cmd.command = ppp_udp_pkt->cblock.command;
2701 mbox->cmd.length = ppp_udp_pkt->cblock.length;
2702
2703 if(mbox->cmd.length) {
2704 memcpy(&mbox->data,(unsigned char *)ppp_udp_pkt->data,
2705 mbox->cmd.length);
2706 }
2707
2708 /* run the command on the board */
2709 err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT;
2710
2711 if (err != CMD_OK) {
2712
2713 ppp_error(card, err, mbox);
2714 ++ppp_priv_area->pipe_mgmt_stat.
2715 UDP_PIPE_mgmt_adptr_cmnd_timeout;
2716 break;
2717 }
2718
2719 ++ppp_priv_area->pipe_mgmt_stat.UDP_PIPE_mgmt_adptr_cmnd_OK;
2720
2721 /* copy the result back to our buffer */
2722 memcpy(&ppp_udp_pkt->cblock,mbox, sizeof(cblock_t));
2723
2724 if(mbox->cmd.length) {
2725 memcpy(&ppp_udp_pkt->data,&mbox->data,mbox->cmd.length);
2726 }
2727
2728 } /* end of switch */
2729 } /* end of else */
2730
2731 /* Fill UDP TTL */
2732 ppp_udp_pkt->ip_pkt.ttl = card->wandev.ttl;
2733 len = reply_udp(ppp_priv_area->udp_pkt_data, mbox->cmd.length);
2734
2735 if (ppp_priv_area->udp_pkt_src == UDP_PKT_FRM_NETWORK) {
2736
2737 /* Make sure we are not already sending */
2738 if (!test_bit(SEND_CRIT,&card->wandev.critical)){
2739 ++ppp_priv_area->pipe_mgmt_stat.UDP_PIPE_mgmt_passed_to_adptr;
2740 ppp_send(card,ppp_priv_area->udp_pkt_data,len,ppp_priv_area->protocol);
2741 }
2742
2743 } else {
2744
2745 /* Pass it up the stack
2746 Allocate socket buffer */
2747 if ((new_skb = dev_alloc_skb(len)) != NULL) {
2748
2749 /* copy data into new_skb */
2750
2751 buf = skb_put(new_skb, len);
2752 memcpy(buf,ppp_priv_area->udp_pkt_data, len);
2753
2754 ++ppp_priv_area->pipe_mgmt_stat.UDP_PIPE_mgmt_passed_to_stack;
2755
2756 /* Decapsulate packet and pass it up the protocol
2757 stack */
2758 new_skb->protocol = htons(ETH_P_IP);
2759 new_skb->dev = dev;
2760 new_skb->mac.raw = new_skb->data;
2761 netif_rx(new_skb);
2762 dev->last_rx = jiffies;
2763
2764 } else {
2765
2766 ++ppp_priv_area->pipe_mgmt_stat.UDP_PIPE_mgmt_no_socket;
2767 printk(KERN_INFO "no socket buffers available!\n");
2768 }
2769 }
2770
2771 ppp_priv_area->udp_pkt_lgth = 0;
2772
2773 return;
2774}
2775
2776/*=============================================================================
2777 * Initial the ppp_private_area structure.
2778 */
2779static void init_ppp_priv_struct( ppp_private_area_t *ppp_priv_area )
2780{
2781
2782 memset(&ppp_priv_area->if_send_stat, 0, sizeof(if_send_stat_t));
2783 memset(&ppp_priv_area->rx_intr_stat, 0, sizeof(rx_intr_stat_t));
2784 memset(&ppp_priv_area->pipe_mgmt_stat, 0, sizeof(pipe_mgmt_stat_t));
2785}
2786
2787/*============================================================================
2788 * Initialize Global Statistics
2789 */
2790static void init_global_statistics( sdla_t *card )
2791{
2792 memset(&card->statistics, 0, sizeof(global_stats_t));
2793}
2794
2795/*============================================================================
2796 * Initialize Receive and Transmit Buffers.
2797 */
2798static void init_ppp_tx_rx_buff( sdla_t *card )
2799{
2800 ppp508_buf_info_t* info;
2801
2802 if (card->hw.type == SDLA_S514) {
2803
2804 info = (void*)(card->hw.dpmbase + PPP514_BUF_OFFS);
2805
2806 card->u.p.txbuf_base = (void*)(card->hw.dpmbase +
2807 info->txb_ptr);
2808
2809 card->u.p.txbuf_last = (ppp_buf_ctl_t*)card->u.p.txbuf_base +
2810 (info->txb_num - 1);
2811
2812 card->u.p.rxbuf_base = (void*)(card->hw.dpmbase +
2813 info->rxb_ptr);
2814
2815 card->u.p.rxbuf_last = (ppp_buf_ctl_t*)card->u.p.rxbuf_base +
2816 (info->rxb_num - 1);
2817
2818 } else {
2819
2820 info = (void*)(card->hw.dpmbase + PPP508_BUF_OFFS);
2821
2822 card->u.p.txbuf_base = (void*)(card->hw.dpmbase +
2823 (info->txb_ptr - PPP508_MB_VECT));
2824
2825 card->u.p.txbuf_last = (ppp_buf_ctl_t*)card->u.p.txbuf_base +
2826 (info->txb_num - 1);
2827
2828 card->u.p.rxbuf_base = (void*)(card->hw.dpmbase +
2829 (info->rxb_ptr - PPP508_MB_VECT));
2830
2831 card->u.p.rxbuf_last = (ppp_buf_ctl_t*)card->u.p.rxbuf_base +
2832 (info->rxb_num - 1);
2833 }
2834
2835 card->u.p.txbuf_next = (unsigned long*)&info->txb_nxt;
2836 card->u.p.rxbuf_next = (unsigned long*)&info->rxb1_ptr;
2837
2838 card->u.p.rx_base = info->rxb_base;
2839 card->u.p.rx_top = info->rxb_end;
2840
2841 card->u.p.txbuf = card->u.p.txbuf_base;
2842 card->rxmb = card->u.p.rxbuf_base;
2843
2844}
2845
2846/*=============================================================================
2847 * Read Connection Information (ie for Remote IP address assginment).
2848 * Called when ppp interface connected.
2849 */
2850static int read_info( sdla_t *card )
2851{
2852 struct net_device *dev = card->wandev.dev;
2853 ppp_private_area_t *ppp_priv_area = dev->priv;
2854 int err;
2855
2856 struct ifreq if_info;
2857 struct sockaddr_in *if_data1, *if_data2;
2858 mm_segment_t fs;
2859
2860 /* Set Local and remote addresses */
2861 memset(&if_info, 0, sizeof(if_info));
2862 strcpy(if_info.ifr_name, dev->name);
2863
2864
2865 fs = get_fs();
2866 set_fs(get_ds()); /* get user space block */
2867
2868 /* Change the local and remote ip address of the interface.
2869 * This will also add in the destination route.
2870 */
2871 if_data1 = (struct sockaddr_in *)&if_info.ifr_addr;
2872 if_data1->sin_addr.s_addr = ppp_priv_area->ip_local;
2873 if_data1->sin_family = AF_INET;
2874 err = devinet_ioctl( SIOCSIFADDR, &if_info );
2875 if_data2 = (struct sockaddr_in *)&if_info.ifr_dstaddr;
2876 if_data2->sin_addr.s_addr = ppp_priv_area->ip_remote;
2877 if_data2->sin_family = AF_INET;
2878 err = devinet_ioctl( SIOCSIFDSTADDR, &if_info );
2879
2880 set_fs(fs); /* restore old block */
2881
2882 if (err) {
2883 printk (KERN_INFO "%s: Adding of route failed: %i\n",
2884 card->devname,err);
2885 printk (KERN_INFO "%s: Local : %u.%u.%u.%u\n",
2886 card->devname,NIPQUAD(ppp_priv_area->ip_local));
2887 printk (KERN_INFO "%s: Remote: %u.%u.%u.%u\n",
2888 card->devname,NIPQUAD(ppp_priv_area->ip_remote));
2889 }
2890 return err;
2891}
2892
2893/*=============================================================================
2894 * Remove Dynamic Route.
2895 * Called when ppp interface disconnected.
2896 */
2897
2898static void remove_route( sdla_t *card )
2899{
2900
2901 struct net_device *dev = card->wandev.dev;
2902 long ip_addr;
2903 int err;
2904
2905 mm_segment_t fs;
2906 struct ifreq if_info;
2907 struct sockaddr_in *if_data1;
2908 struct in_device *in_dev = dev->ip_ptr;
2909 struct in_ifaddr *ifa = in_dev->ifa_list;
2910
2911 ip_addr = ifa->ifa_local;
2912
2913 /* Set Local and remote addresses */
2914 memset(&if_info, 0, sizeof(if_info));
2915 strcpy(if_info.ifr_name, dev->name);
2916
2917 fs = get_fs();
2918 set_fs(get_ds()); /* get user space block */
2919
2920 /* Change the local ip address of the interface to 0.
2921 * This will also delete the destination route.
2922 */
2923 if_data1 = (struct sockaddr_in *)&if_info.ifr_addr;
2924 if_data1->sin_addr.s_addr = 0;
2925 if_data1->sin_family = AF_INET;
2926 err = devinet_ioctl( SIOCSIFADDR, &if_info );
2927
2928 set_fs(fs); /* restore old block */
2929
2930
2931 if (err) {
2932 printk (KERN_INFO "%s: Deleting dynamic route failed %d!\n",
2933 card->devname, err);
2934 return;
2935 }else{
2936 printk (KERN_INFO "%s: PPP Deleting dynamic route %u.%u.%u.%u successfuly\n",
2937 card->devname, NIPQUAD(ip_addr));
2938 }
2939 return;
2940}
2941
2942/*=============================================================================
2943 * Perform the Interrupt Test by running the READ_CODE_VERSION command MAX_INTR
2944 * _TEST_COUNTER times.
2945 */
2946static int intr_test( sdla_t *card )
2947{
2948 ppp_mbox_t *mb = card->mbox;
2949 int err,i;
2950
2951 err = ppp_set_intr_mode( card, 0x08 );
2952
2953 if (err == CMD_OK) {
2954
2955 for (i = 0; i < MAX_INTR_TEST_COUNTER; i ++) {
2956 /* Run command READ_CODE_VERSION */
2957 memset(&mb->cmd, 0, sizeof(ppp_cmd_t));
2958 mb->cmd.length = 0;
2959 mb->cmd.command = PPP_READ_CODE_VERSION;
2960 err = sdla_exec(mb) ? mb->cmd.result : CMD_TIMEOUT;
2961 if (err != CMD_OK)
2962 ppp_error(card, err, mb);
2963 }
2964 }
2965 else return err;
2966
2967 err = ppp_set_intr_mode( card, 0 );
2968 if (err != CMD_OK)
2969 return err;
2970
2971 return 0;
2972}
2973
2974/*==============================================================================
2975 * Determine what type of UDP call it is. DRVSTATS or PTPIPEAB ?
2976 */
2977static int udp_pkt_type( struct sk_buff *skb, sdla_t *card )
2978{
2979 unsigned char *sendpacket;
2980 unsigned char buf2[5];
2981 ppp_udp_pkt_t *ppp_udp_pkt = (ppp_udp_pkt_t *)skb->data;
2982
2983 sendpacket = skb->data;
2984 memcpy(&buf2, &card->wandev.udp_port, 2);
2985
2986 if( ppp_udp_pkt->ip_pkt.ver_inet_hdr_length == 0x45 && /* IP packet */
2987 sendpacket[9] == 0x11 && /* UDP packet */
2988 sendpacket[22] == buf2[1] && /* UDP Port */
2989 sendpacket[23] == buf2[0] &&
2990 sendpacket[36] == 0x01 ) {
2991
2992 if ( sendpacket[28] == 0x50 && /* PTPIPEAB: Signature */
2993 sendpacket[29] == 0x54 &&
2994 sendpacket[30] == 0x50 &&
2995 sendpacket[31] == 0x49 &&
2996 sendpacket[32] == 0x50 &&
2997 sendpacket[33] == 0x45 &&
2998 sendpacket[34] == 0x41 &&
2999 sendpacket[35] == 0x42 ){
3000
3001 return UDP_PTPIPE_TYPE;
3002
3003 } else if(sendpacket[28] == 0x44 && /* DRVSTATS: Signature */
3004 sendpacket[29] == 0x52 &&
3005 sendpacket[30] == 0x56 &&
3006 sendpacket[31] == 0x53 &&
3007 sendpacket[32] == 0x54 &&
3008 sendpacket[33] == 0x41 &&
3009 sendpacket[34] == 0x54 &&
3010 sendpacket[35] == 0x53 ){
3011
3012 return UDP_DRVSTATS_TYPE;
3013
3014 } else
3015 return UDP_INVALID_TYPE;
3016
3017 } else
3018 return UDP_INVALID_TYPE;
3019
3020}
3021
3022/*============================================================================
3023 * Check to see if the packet to be transmitted contains a broadcast or
3024 * multicast source IP address.
3025 */
3026
3027static int chk_bcast_mcast_addr(sdla_t *card, struct net_device* dev,
3028 struct sk_buff *skb)
3029{
3030 u32 src_ip_addr;
3031 u32 broadcast_ip_addr = 0;
3032 struct in_device *in_dev;
3033
3034 /* read the IP source address from the outgoing packet */
3035 src_ip_addr = *(u32 *)(skb->data + 12);
3036
3037 /* read the IP broadcast address for the device */
3038 in_dev = dev->ip_ptr;
3039 if(in_dev != NULL) {
3040 struct in_ifaddr *ifa= in_dev->ifa_list;
3041 if(ifa != NULL)
3042 broadcast_ip_addr = ifa->ifa_broadcast;
3043 else
3044 return 0;
3045 }
3046
3047 /* check if the IP Source Address is a Broadcast address */
3048 if((dev->flags & IFF_BROADCAST) && (src_ip_addr == broadcast_ip_addr)) {
3049 printk(KERN_INFO "%s: Broadcast Source Address silently discarded\n",
3050 card->devname);
3051 return 1;
3052 }
3053
3054 /* check if the IP Source Address is a Multicast address */
3055 if((ntohl(src_ip_addr) >= 0xE0000001) &&
3056 (ntohl(src_ip_addr) <= 0xFFFFFFFE)) {
3057 printk(KERN_INFO "%s: Multicast Source Address silently discarded\n",
3058 card->devname);
3059 return 1;
3060 }
3061
3062 return 0;
3063}
3064
3065void s508_lock (sdla_t *card, unsigned long *smp_flags)
3066{
3067 spin_lock_irqsave(&card->wandev.lock, *smp_flags);
3068}
3069
3070void s508_unlock (sdla_t *card, unsigned long *smp_flags)
3071{
3072 spin_unlock_irqrestore(&card->wandev.lock, *smp_flags);
3073}
3074
3075static int read_connection_info (sdla_t *card)
3076{
3077 ppp_mbox_t *mb = card->mbox;
3078 struct net_device *dev = card->wandev.dev;
3079 ppp_private_area_t *ppp_priv_area = dev->priv;
3080 ppp508_connect_info_t *ppp508_connect_info;
3081 int err;
3082
3083 memset(&mb->cmd, 0, sizeof(ppp_cmd_t));
3084 mb->cmd.length = 0;
3085 mb->cmd.command = PPP_GET_CONNECTION_INFO;
3086 err = sdla_exec(mb) ? mb->cmd.result : CMD_TIMEOUT;
3087
3088 if (err != CMD_OK) {
3089 ppp_error(card, err, mb);
3090 ppp_priv_area->ip_remote = 0;
3091 ppp_priv_area->ip_local = 0;
3092 }
3093 else {
3094 ppp508_connect_info = (ppp508_connect_info_t *)mb->data;
3095 ppp_priv_area->ip_remote = ppp508_connect_info->ip_remote;
3096 ppp_priv_area->ip_local = ppp508_connect_info->ip_local;
3097
3098 NEX_PRINTK(KERN_INFO "READ CONNECTION GOT IP ADDRESS %x, %x\n",
3099 ppp_priv_area->ip_remote,
3100 ppp_priv_area->ip_local);
3101 }
3102
3103 return err;
3104}
3105
3106/*===============================================================================
3107 * config_ppp
3108 *
3109 * Configure the ppp protocol and enable communications.
3110 *
3111 * The if_open function binds this function to the poll routine.
3112 * Therefore, this function will run every time the ppp interface
3113 * is brought up.
3114 *
3115 * If the communications are not enabled, proceed to configure
3116 * the card and enable communications.
3117 *
3118 * If the communications are enabled, it means that the interface
3119 * was shutdown by ether the user or driver. In this case, we
3120 * have to check that the IP addresses have not changed. If
3121 * the IP addresses changed, we have to reconfigure the firmware
3122 * and update the changed IP addresses. Otherwise, just exit.
3123 */
3124static int config_ppp (sdla_t *card)
3125{
3126
3127 struct net_device *dev = card->wandev.dev;
3128 ppp_flags_t *flags = card->flags;
3129 ppp_private_area_t *ppp_priv_area = dev->priv;
3130
3131 if (card->u.p.comm_enabled){
3132
3133 if (ppp_priv_area->ip_local_tmp != ppp_priv_area->ip_local ||
3134 ppp_priv_area->ip_remote_tmp != ppp_priv_area->ip_remote){
3135
3136 /* The IP addersses have changed, we must
3137 * stop the communications and reconfigure
3138 * the card. Reason: the firmware must know
3139 * the local and remote IP addresses. */
3140 disable_comm(card);
3141 wanpipe_set_state(card, WAN_DISCONNECTED);
3142 printk(KERN_INFO
3143 "%s: IP addresses changed!\n",
3144 card->devname);
3145 printk(KERN_INFO "%s: Restarting communications ...\n",
3146 card->devname);
3147 }else{
3148 /* IP addresses are the same and the link is up,
3149 * we don't have to do anything here. Therefore, exit */
3150 return 0;
3151 }
3152 }
3153
3154 /* Record the new IP addreses */
3155 ppp_priv_area->ip_local = ppp_priv_area->ip_local_tmp;
3156 ppp_priv_area->ip_remote = ppp_priv_area->ip_remote_tmp;
3157
3158 if (config508(dev, card)){
3159 printk(KERN_INFO "%s: Failed to configure PPP device\n",
3160 card->devname);
3161 return 0;
3162 }
3163
3164 if (ppp_set_intr_mode(card, PPP_INTR_RXRDY|
3165 PPP_INTR_TXRDY|
3166 PPP_INTR_MODEM|
3167 PPP_INTR_DISC |
3168 PPP_INTR_OPEN |
3169 PPP_INTR_DROP_DTR |
3170 PPP_INTR_TIMER)) {
3171
3172 printk(KERN_INFO "%s: Failed to configure board interrupts !\n",
3173 card->devname);
3174 return 0;
3175 }
3176
3177 /* Turn off the transmit and timer interrupt */
3178 flags->imask &= ~(PPP_INTR_TXRDY | PPP_INTR_TIMER) ;
3179
3180
3181 /* If you are not the authenticator and any one of the protocol is
3182 * enabled then we call the set_out_bound_authentication.
3183 */
3184 if ( !card->u.p.authenticator && (ppp_priv_area->pap || ppp_priv_area->chap)) {
3185 if ( ppp_set_outbnd_auth(card, ppp_priv_area) ){
3186 printk(KERN_INFO "%s: Outbound authentication failed !\n",
3187 card->devname);
3188 return 0;
3189 }
3190 }
3191
3192 /* If you are the authenticator and any one of the protocol is enabled
3193 * then we call the set_in_bound_authentication.
3194 */
3195 if (card->u.p.authenticator && (ppp_priv_area->pap || ppp_priv_area->chap)){
3196 if (ppp_set_inbnd_auth(card, ppp_priv_area)){
3197 printk(KERN_INFO "%s: Inbound authentication failed !\n",
3198 card->devname);
3199 return 0;
3200 }
3201 }
3202
3203 /* If we fail to enable communications here it's OK,
3204 * since the DTR timer will cause a disconnected, which
3205 * will retrigger communication in timer_intr() */
3206 if (ppp_comm_enable(card) == CMD_OK) {
3207 wanpipe_set_state(card, WAN_CONNECTING);
3208 init_ppp_tx_rx_buff(card);
3209 }
3210
3211 return 0;
3212}
3213
3214/*============================================================
3215 * ppp_poll
3216 *
3217 * Rationale:
3218 * We cannot manipulate the routing tables, or
3219 * ip addresses withing the interrupt. Therefore
3220 * we must perform such actons outside an interrupt
3221 * at a later time.
3222 *
3223 * Description:
3224 * PPP polling routine, responsible for
3225 * shutting down interfaces upon disconnect
3226 * and adding/removing routes.
3227 *
3228 * Usage:
3229 * This function is executed for each ppp
3230 * interface through a tq_schedule bottom half.
3231 *
3232 * trigger_ppp_poll() function is used to kick
3233 * the ppp_poll routine.
3234 */
3235static void ppp_poll(struct net_device *dev)
3236{
3237 ppp_private_area_t *ppp_priv_area;
3238 sdla_t *card;
3239 u8 check_gateway=0;
3240 ppp_flags_t *flags;
3241
3242 if (!dev || (ppp_priv_area = dev->priv) == NULL)
3243 return;
3244
3245 card = ppp_priv_area->card;
3246 flags = card->flags;
3247
3248 /* Shutdown is in progress, stop what you are
3249 * doing and get out */
3250 if (test_bit(PERI_CRIT,&card->wandev.critical)){
3251 clear_bit(POLL_CRIT,&card->wandev.critical);
3252 return;
3253 }
3254
3255 /* if_open() function has triggered the polling routine
3256 * to determine the configured IP addresses. Once the
3257 * addresses are found, trigger the chdlc configuration */
3258 if (test_bit(0,&ppp_priv_area->config_ppp)){
3259
3260 ppp_priv_area->ip_local_tmp = get_ip_address(dev,WAN_LOCAL_IP);
3261 ppp_priv_area->ip_remote_tmp = get_ip_address(dev,WAN_POINTOPOINT_IP);
3262
3263 if (ppp_priv_area->ip_local_tmp == ppp_priv_area->ip_remote_tmp &&
3264 card->u.p.ip_mode == WANOPT_PPP_HOST){
3265
3266 if (++ppp_priv_area->ip_error > MAX_IP_ERRORS){
3267 printk(KERN_INFO "\n%s: --- WARNING ---\n",
3268 card->devname);
3269 printk(KERN_INFO "%s: The local IP address is the same as the\n",
3270 card->devname);
3271 printk(KERN_INFO "%s: Point-to-Point IP address.\n",
3272 card->devname);
3273 printk(KERN_INFO "%s: --- WARNING ---\n\n",
3274 card->devname);
3275 }else{
3276 clear_bit(POLL_CRIT,&card->wandev.critical);
3277 ppp_priv_area->poll_delay_timer.expires = jiffies+HZ;
3278 add_timer(&ppp_priv_area->poll_delay_timer);
3279 return;
3280 }
3281 }
3282
3283 ppp_priv_area->timer_int_enabled |= TMR_INT_ENABLED_CONFIG;
3284 flags->imask |= PPP_INTR_TIMER;
3285 ppp_priv_area->ip_error=0;
3286
3287 clear_bit(0,&ppp_priv_area->config_ppp);
3288 clear_bit(POLL_CRIT,&card->wandev.critical);
3289 return;
3290 }
3291
3292 /* Dynamic interface implementation, as well as dynamic
3293 * routing. */
3294
3295 switch (card->wandev.state) {
3296
3297 case WAN_DISCONNECTED:
3298
3299 /* If the dynamic interface configuration is on, and interface
3300 * is up, then bring down the netowrk interface */
3301
3302 if (test_bit(DYN_OPT_ON,&ppp_priv_area->interface_down) &&
3303 !test_bit(DEV_DOWN,&ppp_priv_area->interface_down) &&
3304 card->wandev.dev->flags & IFF_UP){
3305
3306 printk(KERN_INFO "%s: Interface %s down.\n",
3307 card->devname,card->wandev.dev->name);
3308 change_dev_flags(card->wandev.dev,
3309 (card->wandev.dev->flags&~IFF_UP));
3310 set_bit(DEV_DOWN,&ppp_priv_area->interface_down);
3311 }else{
3312 /* We need to check if the local IP address is
3313 * zero. If it is, we shouldn't try to remove it.
3314 * For some reason the kernel crashes badly if
3315 * we try to remove the route twice */
3316
3317 if (card->wandev.dev->flags & IFF_UP &&
3318 get_ip_address(card->wandev.dev,WAN_LOCAL_IP) &&
3319 card->u.p.ip_mode == WANOPT_PPP_PEER){
3320
3321 remove_route(card);
3322 }
3323 }
3324 break;
3325
3326 case WAN_CONNECTED:
3327
3328 /* In SMP machine this code can execute before the interface
3329 * comes up. In this case, we must make sure that we do not
3330 * try to bring up the interface before dev_open() is finished */
3331
3332
3333 /* DEV_DOWN will be set only when we bring down the interface
3334 * for the very first time. This way we know that it was us
3335 * that brought the interface down */
3336
3337 if (test_bit(DYN_OPT_ON,&ppp_priv_area->interface_down) &&
3338 test_bit(DEV_DOWN, &ppp_priv_area->interface_down) &&
3339 !(card->wandev.dev->flags & IFF_UP)){
3340
3341 printk(KERN_INFO "%s: Interface %s up.\n",
3342 card->devname,card->wandev.dev->name);
3343
3344 change_dev_flags(card->wandev.dev,(card->wandev.dev->flags|IFF_UP));
3345 clear_bit(DEV_DOWN,&ppp_priv_area->interface_down);
3346 check_gateway=1;
3347 }
3348
3349 if ((card->u.p.ip_mode == WANOPT_PPP_PEER) &&
3350 test_bit(1,&Read_connection_info)) {
3351
3352 process_route(card);
3353 clear_bit(1,&Read_connection_info);
3354 check_gateway=1;
3355 }
3356
3357 if (ppp_priv_area->gateway && check_gateway)
3358 add_gateway(card,dev);
3359
3360 break;
3361 }
3362 clear_bit(POLL_CRIT,&card->wandev.critical);
3363 return;
3364}
3365
3366/*============================================================
3367 * trigger_ppp_poll
3368 *
3369 * Description:
3370 * Add a ppp_poll() task into a tq_scheduler bh handler
3371 * for a specific interface. This will kick
3372 * the ppp_poll() routine at a later time.
3373 *
3374 * Usage:
3375 * Interrupts use this to defer a taks to
3376 * a polling routine.
3377 *
3378 */
3379
3380static void trigger_ppp_poll(struct net_device *dev)
3381{
3382 ppp_private_area_t *ppp_priv_area;
3383 if ((ppp_priv_area=dev->priv) != NULL){
3384
3385 sdla_t *card = ppp_priv_area->card;
3386
3387 if (test_bit(PERI_CRIT,&card->wandev.critical)){
3388 return;
3389 }
3390
3391 if (test_and_set_bit(POLL_CRIT,&card->wandev.critical)){
3392 return;
3393 }
3394
3395 schedule_work(&ppp_priv_area->poll_work);
3396 }
3397 return;
3398}
3399
3400static void ppp_poll_delay (unsigned long dev_ptr)
3401{
3402 struct net_device *dev = (struct net_device *)dev_ptr;
3403 trigger_ppp_poll(dev);
3404}
3405
3406/*============================================================
3407 * detect_and_fix_tx_bug
3408 *
3409 * Description:
3410 * On connect, if the board tx buffer ptr is not the same
3411 * as the driver tx buffer ptr, we found a firmware bug.
3412 * Report the bug to the above layer. To fix the
3413 * error restart communications again.
3414 *
3415 * Usage:
3416 *
3417 */
3418
3419static int detect_and_fix_tx_bug (sdla_t *card)
3420{
3421 if (((unsigned long)card->u.p.txbuf_base&0xFFF) != ((*card->u.p.txbuf_next)&0xFFF)){
3422 NEX_PRINTK(KERN_INFO "Major Error, Fix the bug\n");
3423 return 1;
3424 }
3425 return 0;
3426}
3427
3428MODULE_LICENSE("GPL");
3429
3430/****** End *****************************************************************/
Linux kernel - Deliverables
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