File: /usr/src/linux/drivers/net/wan/sdla_ppp.c
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/version.h>
95 #include <linux/kernel.h> /* printk(), and other useful stuff */
96 #include <linux/stddef.h> /* offsetof(), etc. */
97 #include <linux/errno.h> /* return codes */
98 #include <linux/string.h> /* inline memset(), etc. */
99 #include <linux/slab.h> /* kmalloc(), kfree() */
100 #include <linux/wanrouter.h> /* WAN router definitions */
101 #include <linux/wanpipe.h> /* WANPIPE common user API definitions */
102 #include <linux/if_arp.h> /* ARPHRD_* defines */
103 #include <asm/byteorder.h> /* htons(), etc. */
104 #include <linux/in.h> /* sockaddr_in */
105 #include <linux/inet.h> /* in_aton(), in_ntoa() prototypes */
106
107
108 /* ---- 2.4.X KERNEL SUPPORT -----------------------*/
109 #if defined(LINUX_2_1) || defined(LINUX_2_4)
110 #include <asm/uaccess.h>
111 #include <linux/inetdevice.h>
112 #include <linux/netdevice.h>
113 #else
114 #include <asm/segment.h>
115 #include <net/route.h> /* Adding new route entries : 2.0.X kernels */
116 #endif
117
118 #include <linux/if.h>
119 #include <linux/sdla_ppp.h> /* PPP firmware API definitions */
120 #include <linux/sdlasfm.h> /* S514 Type Definition */
121 /****** Defines & Macros ****************************************************/
122
123 #define PPP_DFLT_MTU 1500 /* default MTU */
124 #define PPP_MAX_MTU 4000 /* maximum MTU */
125 #define PPP_HDR_LEN 1
126
127 #define MAX_IP_ERRORS 100
128
129 #define CONNECT_TIMEOUT (90*HZ) /* link connection timeout */
130 #define HOLD_DOWN_TIME (5*HZ) /* link hold down time : Changed from 30 to 5 */
131
132 /* For handle_IPXWAN() */
133 #define CVHexToAscii(b) (((unsigned char)(b) > (unsigned char)9) ? ((unsigned char)'A' + ((unsigned char)(b) - (unsigned char)10)) : ((unsigned char)'0' + (unsigned char)(b)))
134
135 /* Macro for enabling/disabling debugging comments */
136 //#define NEX_DEBUG
137 #ifdef NEX_DEBUG
138 #define NEX_PRINTK(format, a...) printk(format, ## a)
139 #else
140 #define NEX_PRINTK(format, a...)
141 #endif /* NEX_DEBUG */
142
143 #define DCD(a) ( a & 0x08 ? "HIGH" : "LOW" )
144 #define CTS(a) ( a & 0x20 ? "HIGH" : "LOW" )
145 #define LCP(a) ( a == 0x09 ? "OPEN" : "CLOSED" )
146 #define IP(a) ( a == 0x09 ? "ENABLED" : "DISABLED" )
147
148 #define TMR_INT_ENABLED_UPDATE 0x01
149 #define TMR_INT_ENABLED_PPP_EVENT 0x02
150 #define TMR_INT_ENABLED_UDP 0x04
151 #define TMR_INT_ENABLED_CONFIG 0x20
152
153 /* Set Configuraton Command Definitions */
154 #define PERCENT_TX_BUFF 60
155 #define TIME_BETWEEN_CONF_REQ 30
156 #define TIME_BETWEEN_PAP_CHAP_REQ 30
157 #define WAIT_PAP_CHAP_WITHOUT_REPLY 300
158 #define WAIT_AFTER_DCD_CTS_LOW 5
159 #define TIME_DCD_CTS_LOW_AFTER_LNK_DOWN 10
160 #define WAIT_DCD_HIGH_AFTER_ENABLE_COMM 900
161 #define MAX_CONF_REQ_WITHOUT_REPLY 10
162 #define MAX_TERM_REQ_WITHOUT_REPLY 2
163 #define NUM_CONF_NAK_WITHOUT_REPLY 5
164 #define NUM_AUTH_REQ_WITHOUT_REPLY 10
165
166 #define END_OFFSET 0x1F0
167 #if LINUX_VERSION_CODE < 0x020125
168 #define test_and_set_bit set_bit
169 #define net_ratelimit() 1
170 #endif
171
172
173 /******Data Structures*****************************************************/
174
175 /* This structure is placed in the private data area of the device structure.
176 * The card structure used to occupy the private area but now the following
177 * structure will incorporate the card structure along with PPP specific data
178 */
179
180 typedef struct ppp_private_area
181 {
182 netdevice_t *slave;
183 sdla_t* card;
184 unsigned long router_start_time; /*router start time in sec */
185 unsigned long tick_counter; /*used for 5 second counter*/
186 unsigned mc; /*multicast support on or off*/
187 unsigned char enable_IPX;
188 unsigned long network_number;
189 unsigned char pap;
190 unsigned char chap;
191 unsigned char sysname[31]; /* system name for in-bnd auth*/
192 unsigned char userid[511]; /* list of user ids */
193 unsigned char passwd[511]; /* list of passwords */
194 unsigned protocol; /* SKB Protocol */
195 u32 ip_local; /* Local IP Address */
196 u32 ip_remote; /* remote IP Address */
197
198 u32 ip_local_tmp;
199 u32 ip_remote_tmp;
200
201 unsigned char timer_int_enabled; /* Who enabled the timer inter*/
202 unsigned char update_comms_stats; /* Used by update function */
203 unsigned long curr_trace_addr; /* Trace information */
204 unsigned long start_trace_addr;
205 unsigned long end_trace_addr;
206
207 unsigned char interface_down; /* Brind down interface when channel
208 goes down */
209 unsigned long config_wait_timeout; /* After if_open() if in dynamic if mode,
210 wait a few seconds before configuring */
211
212 unsigned short udp_pkt_lgth;
213 char udp_pkt_src;
214 char udp_pkt_data[MAX_LGTH_UDP_MGNT_PKT];
215
216 /* PPP specific statistics */
217
218 if_send_stat_t if_send_stat;
219 rx_intr_stat_t rx_intr_stat;
220 pipe_mgmt_stat_t pipe_mgmt_stat;
221
222 unsigned long router_up_time;
223
224 /* Polling task queue. Each interface
225 * has its own task queue, which is used
226 * to defer events from the interrupt */
227 struct tq_struct poll_task;
228 struct timer_list poll_delay_timer;
229
230 u8 gateway;
231 u8 config_ppp;
232 u8 ip_error;
233
234 }ppp_private_area_t;
235
236 /* variable for keeping track of enabling/disabling FT1 monitor status */
237 static int rCount = 0;
238
239 extern void disable_irq(unsigned int);
240 extern void enable_irq(unsigned int);
241
242 /****** Function Prototypes *************************************************/
243
244 /* WAN link driver entry points. These are called by the WAN router module. */
245 static int update(wan_device_t *wandev);
246 static int new_if(wan_device_t *wandev, netdevice_t *dev, wanif_conf_t *conf);
247 static int del_if(wan_device_t *wandev, netdevice_t *dev);
248
249 /* WANPIPE-specific entry points */
250 static int wpp_exec (struct sdla *card, void *u_cmd, void *u_data);
251
252 /* Network device interface */
253 static int if_init(netdevice_t *dev);
254 static int if_open(netdevice_t *dev);
255 static int if_close(netdevice_t *dev);
256 static int if_header(struct sk_buff *skb, netdevice_t *dev, unsigned short type,
257 void *daddr, void *saddr, unsigned len);
258
259 #ifdef LINUX_2_4
260 static void if_tx_timeout (netdevice_t *dev);
261 #endif
262
263 #if defined(LINUX_2_1) || defined(LINUX_2_4)
264 static int if_rebuild_hdr(struct sk_buff *skb);
265 static struct net_device_stats *if_stats(netdevice_t *dev);
266 #else
267 static struct enet_statistics *if_stats(netdevice_t *dev);
268 static int if_rebuild_hdr (void* hdr, netdevice_t* dev, unsigned long raddr,
269 struct sk_buff* skb);
270 #endif
271 static int if_send(struct sk_buff *skb, netdevice_t *dev);
272
273
274 /* PPP firmware interface functions */
275 static int ppp_read_version(sdla_t *card, char *str);
276 static int ppp_set_outbnd_auth(sdla_t *card, ppp_private_area_t *ppp_priv_area);
277 static int ppp_set_inbnd_auth(sdla_t *card, ppp_private_area_t *ppp_priv_area);
278 static int ppp_configure(sdla_t *card, void *data);
279 static int ppp_set_intr_mode(sdla_t *card, unsigned char mode);
280 static int ppp_comm_enable(sdla_t *card);
281 static int ppp_comm_disable(sdla_t *card);
282 static int ppp_comm_disable_shutdown(sdla_t *card);
283 static int ppp_get_err_stats(sdla_t *card);
284 static int ppp_send(sdla_t *card, void *data, unsigned len, unsigned proto);
285 static int ppp_error(sdla_t *card, int err, ppp_mbox_t *mb);
286
287 static void wpp_isr(sdla_t *card);
288 static void rx_intr(sdla_t *card);
289 static void event_intr(sdla_t *card);
290 static void timer_intr(sdla_t *card);
291
292 /* Background polling routines */
293 static void process_route(sdla_t *card);
294 static void retrigger_comm(sdla_t *card);
295
296 /* Miscellaneous functions */
297 static int read_info( sdla_t *card );
298 static int read_connection_info (sdla_t *card);
299 static void remove_route( sdla_t *card );
300 static int config508(netdevice_t *dev, sdla_t *card);
301 static void show_disc_cause(sdla_t * card, unsigned cause);
302 static int reply_udp( unsigned char *data, unsigned int mbox_len );
303 static void process_udp_mgmt_pkt(sdla_t *card, netdevice_t *dev,
304 ppp_private_area_t *ppp_priv_area);
305 static void init_ppp_tx_rx_buff( sdla_t *card );
306 static int intr_test( sdla_t *card );
307 static int udp_pkt_type( struct sk_buff *skb , sdla_t *card);
308 static void init_ppp_priv_struct( ppp_private_area_t *ppp_priv_area);
309 static void init_global_statistics( sdla_t *card );
310 static int tokenize(char *str, char **tokens);
311 static char* strstrip(char *str, char *s);
312 static int chk_bcast_mcast_addr(sdla_t* card, netdevice_t* dev,
313 struct sk_buff *skb);
314
315 static int config_ppp (sdla_t *);
316 static void ppp_poll(netdevice_t *);
317 static void trigger_ppp_poll(netdevice_t *);
318 static void ppp_poll_delay (unsigned long dev_ptr);
319
320
321 static int Read_connection_info;
322 static int Intr_test_counter;
323 static unsigned short available_buffer_space;
324
325
326 /* IPX functions */
327 static void switch_net_numbers(unsigned char *sendpacket, unsigned long network_number,
328 unsigned char incoming);
329 static int handle_IPXWAN(unsigned char *sendpacket, char *devname, unsigned char enable_PX,
330 unsigned long network_number, unsigned short proto);
331
332 /* Lock Functions */
333 static void s508_lock (sdla_t *card, unsigned long *smp_flags);
334 static void s508_unlock (sdla_t *card, unsigned long *smp_flags);
335
336 static int store_udp_mgmt_pkt(char udp_pkt_src, sdla_t* card,
337 struct sk_buff *skb, netdevice_t* dev,
338 ppp_private_area_t* ppp_priv_area );
339 static unsigned short calc_checksum (char *data, int len);
340 static void disable_comm (sdla_t *card);
341 static int detect_and_fix_tx_bug (sdla_t *card);
342
343 /****** Public Functions ****************************************************/
344
345 /*============================================================================
346 * PPP protocol initialization routine.
347 *
348 * This routine is called by the main WANPIPE module during setup. At this
349 * point adapter is completely initialized and firmware is running.
350 * o read firmware version (to make sure it's alive)
351 * o configure adapter
352 * o initialize protocol-specific fields of the adapter data space.
353 *
354 * Return: 0 o.k.
355 * < 0 failure.
356 */
357 int wpp_init(sdla_t *card, wandev_conf_t *conf)
358 {
359 ppp_flags_t *flags;
360 union
361 {
362 char str[80];
363 } u;
364
365 /* Verify configuration ID */
366 if (conf->config_id != WANCONFIG_PPP) {
367
368 printk(KERN_INFO "%s: invalid configuration ID %u!\n",
369 card->devname, conf->config_id);
370 return -EINVAL;
371
372 }
373
374 /* Initialize miscellaneous pointers to structures on the adapter */
375 switch (card->hw.type) {
376
377 case SDLA_S508:
378 card->mbox =(void*)(card->hw.dpmbase + PPP508_MB_OFFS);
379 card->flags=(void*)(card->hw.dpmbase + PPP508_FLG_OFFS);
380 break;
381
382 case SDLA_S514:
383 card->mbox =(void*)(card->hw.dpmbase + PPP514_MB_OFFS);
384 card->flags=(void*)(card->hw.dpmbase + PPP514_FLG_OFFS);
385 break;
386
387 default:
388 return -EINVAL;
389
390 }
391 flags = card->flags;
392
393 /* Read firmware version. Note that when adapter initializes, it
394 * clears the mailbox, so it may appear that the first command was
395 * executed successfully when in fact it was merely erased. To work
396 * around this, we execute the first command twice.
397 */
398 if (ppp_read_version(card, NULL) || ppp_read_version(card, u.str))
399 return -EIO;
400
401 printk(KERN_INFO "%s: running PPP firmware v%s\n",card->devname, u.str);
402 /* Adjust configuration and set defaults */
403 card->wandev.mtu = (conf->mtu) ?
404 min_t(unsigned int, conf->mtu, PPP_MAX_MTU) : PPP_DFLT_MTU;
405
406 card->wandev.bps = conf->bps;
407 card->wandev.interface = conf->interface;
408 card->wandev.clocking = conf->clocking;
409 card->wandev.station = conf->station;
410 card->isr = &wpp_isr;
411 card->poll = NULL;
412 card->exec = &wpp_exec;
413 card->wandev.update = &update;
414 card->wandev.new_if = &new_if;
415 card->wandev.del_if = &del_if;
416 card->wandev.udp_port = conf->udp_port;
417 card->wandev.ttl = conf->ttl;
418 card->wandev.state = WAN_DISCONNECTED;
419 card->disable_comm = &disable_comm;
420 card->irq_dis_if_send_count = 0;
421 card->irq_dis_poll_count = 0;
422 card->u.p.authenticator = conf->u.ppp.authenticator;
423 card->u.p.ip_mode = conf->u.ppp.ip_mode ?
424 conf->u.ppp.ip_mode : WANOPT_PPP_STATIC;
425 card->TracingEnabled = 0;
426 Read_connection_info = 1;
427
428 /* initialize global statistics */
429 init_global_statistics( card );
430
431
432
433 if (!card->configured){
434 int err;
435
436 Intr_test_counter = 0;
437 err = intr_test(card);
438
439 if(err || (Intr_test_counter < MAX_INTR_TEST_COUNTER)) {
440 printk("%s: Interrupt Test Failed, Counter: %i\n",
441 card->devname, Intr_test_counter);
442 printk( "%s: Please choose another interrupt\n",card->devname);
443 return -EIO;
444 }
445
446 printk(KERN_INFO "%s: Interrupt Test Passed, Counter: %i\n",
447 card->devname, Intr_test_counter);
448 card->configured = 1;
449 }
450
451 ppp_set_intr_mode(card, PPP_INTR_TIMER);
452
453 /* Turn off the transmit and timer interrupt */
454 flags->imask &= ~PPP_INTR_TIMER;
455
456 printk(KERN_INFO "\n");
457
458 return 0;
459 }
460
461 /******* WAN Device Driver Entry Points *************************************/
462
463 /*============================================================================
464 * Update device status & statistics.
465 */
466 static int update(wan_device_t *wandev)
467 {
468 sdla_t* card = wandev->private;
469 netdevice_t* dev;
470 volatile ppp_private_area_t *ppp_priv_area;
471 ppp_flags_t *flags = card->flags;
472 unsigned long timeout;
473
474 /* sanity checks */
475 if ((wandev == NULL) || (wandev->private == NULL))
476 return -EFAULT;
477
478 if (wandev->state == WAN_UNCONFIGURED)
479 return -ENODEV;
480
481 /* Shutdown bug fix. This function can be
482 * called with NULL dev pointer during
483 * shutdown
484 */
485 if ((dev=card->wandev.dev) == NULL){
486 return -ENODEV;
487 }
488
489 if ((ppp_priv_area=dev->priv) == NULL){
490 return -ENODEV;
491 }
492
493 ppp_priv_area->update_comms_stats = 2;
494 ppp_priv_area->timer_int_enabled |= TMR_INT_ENABLED_UPDATE;
495 flags->imask |= PPP_INTR_TIMER;
496
497 /* wait a maximum of 1 second for the statistics to be updated */
498 timeout = jiffies;
499 for(;;) {
500 if(ppp_priv_area->update_comms_stats == 0){
501 break;
502 }
503 if ((jiffies - timeout) > (1 * HZ)){
504 ppp_priv_area->update_comms_stats = 0;
505 ppp_priv_area->timer_int_enabled &=
506 ~TMR_INT_ENABLED_UPDATE;
507 return -EAGAIN;
508 }
509 }
510
511 return 0;
512 }
513
514 /*============================================================================
515 * Create new logical channel.
516 * This routine is called by the router when ROUTER_IFNEW IOCTL is being
517 * handled.
518 * o parse media- and hardware-specific configuration
519 * o make sure that a new channel can be created
520 * o allocate resources, if necessary
521 * o prepare network device structure for registaration.
522 *
523 * Return: 0 o.k.
524 * < 0 failure (channel will not be created)
525 */
526 static int new_if(wan_device_t *wandev, netdevice_t *dev, wanif_conf_t *conf)
527 {
528 sdla_t *card = wandev->private;
529 ppp_private_area_t *ppp_priv_area;
530
531 if (wandev->ndev)
532 return -EEXIST;
533
534
535 printk(KERN_INFO "%s: Configuring Interface: %s\n",
536 card->devname, conf->name);
537
538 if ((conf->name[0] == '\0') || (strlen(conf->name) > WAN_IFNAME_SZ)) {
539
540 printk(KERN_INFO "%s: Invalid interface name!\n",
541 card->devname);
542 return -EINVAL;
543
544 }
545
546 /* allocate and initialize private data */
547 ppp_priv_area = kmalloc(sizeof(ppp_private_area_t), GFP_KERNEL);
548
549 if( ppp_priv_area == NULL )
550 return -ENOMEM;
551
552 memset(ppp_priv_area, 0, sizeof(ppp_private_area_t));
553
554 ppp_priv_area->card = card;
555
556 /* initialize data */
557 strcpy(card->u.p.if_name, conf->name);
558
559 /* initialize data in ppp_private_area structure */
560
561 init_ppp_priv_struct( ppp_priv_area );
562
563 ppp_priv_area->mc = conf->mc;
564 ppp_priv_area->pap = conf->pap;
565 ppp_priv_area->chap = conf->chap;
566
567 /* Option to bring down the interface when
568 * the link goes down */
569 if (conf->if_down){
570 set_bit(DYN_OPT_ON,&ppp_priv_area->interface_down);
571 printk("%s: Dynamic interface configuration enabled\n",
572 card->devname);
573 }
574
575 /* If no user ids are specified */
576 if(!strlen(conf->userid) && (ppp_priv_area->pap||ppp_priv_area->chap)){
577 kfree(ppp_priv_area);
578 return -EINVAL;
579 }
580
581 /* If no passwords are specified */
582 if(!strlen(conf->passwd) && (ppp_priv_area->pap||ppp_priv_area->chap)){
583 kfree(ppp_priv_area);
584 return -EINVAL;
585 }
586
587 if(strlen(conf->sysname) > 31){
588 kfree(ppp_priv_area);
589 return -EINVAL;
590 }
591
592 /* If no system name is specified */
593 if(!strlen(conf->sysname) && (card->u.p.authenticator)){
594 kfree(ppp_priv_area);
595 return -EINVAL;
596 }
597
598 /* copy the data into the ppp private structure */
599 memcpy(ppp_priv_area->userid, conf->userid, strlen(conf->userid));
600 memcpy(ppp_priv_area->passwd, conf->passwd, strlen(conf->passwd));
601 memcpy(ppp_priv_area->sysname, conf->sysname, strlen(conf->sysname));
602
603
604 ppp_priv_area->enable_IPX = conf->enable_IPX;
605 if (conf->network_number){
606 ppp_priv_area->network_number = conf->network_number;
607 }else{
608 ppp_priv_area->network_number = 0xDEADBEEF;
609 }
610
611 /* Tells us that if this interface is a
612 * gateway or not */
613 if ((ppp_priv_area->gateway = conf->gateway) == WANOPT_YES){
614 printk(KERN_INFO "%s: Interface %s is set as a gateway.\n",
615 card->devname,card->u.p.if_name);
616 }
617
618 /* prepare network device data space for registration */
619 #ifdef LINUX_2_4
620 strcpy(dev->name,card->u.p.if_name);
621 #else
622 dev->name = (char *)kmalloc(strlen(card->u.p.if_name) + 2, GFP_KERNEL);
623 if(dev->name == NULL)
624 {
625 kfree(ppp_priv_area);
626 return -ENOMEM;
627 }
628 sprintf(dev->name, "%s", card->u.p.if_name);
629 #endif
630
631 dev->init = &if_init;
632 dev->priv = ppp_priv_area;
633 dev->mtu = min_t(unsigned int, dev->mtu, card->wandev.mtu);
634
635 /* Initialize the polling task routine */
636 #ifndef LINUX_2_4
637 ppp_priv_area->poll_task.next = NULL;
638 #endif
639 ppp_priv_area->poll_task.sync=0;
640 ppp_priv_area->poll_task.routine = (void*)(void*)ppp_poll;
641 ppp_priv_area->poll_task.data = dev;
642
643 /* Initialize the polling delay timer */
644 init_timer(&ppp_priv_area->poll_delay_timer);
645 ppp_priv_area->poll_delay_timer.data = (unsigned long)dev;
646 ppp_priv_area->poll_delay_timer.function = ppp_poll_delay;
647
648
649 /* Since we start with dummy IP addresses we can say
650 * that route exists */
651 printk(KERN_INFO "\n");
652
653 return 0;
654 }
655
656 /*============================================================================
657 * Delete logical channel.
658 */
659 static int del_if(wan_device_t *wandev, netdevice_t *dev)
660 {
661 return 0;
662 }
663
664 static void disable_comm (sdla_t *card)
665 {
666 ppp_comm_disable_shutdown(card);
667 return;
668 }
669
670 /****** WANPIPE-specific entry points ***************************************/
671
672 /*============================================================================
673 * Execute adapter interface command.
674 */
675
676 //FIXME: Why do we need this ????
677 static int wpp_exec(struct sdla *card, void *u_cmd, void *u_data)
678 {
679 ppp_mbox_t *mbox = card->mbox;
680 int len;
681
682 #if defined(LINUX_2_1) || defined(LINUX_2_4)
683 if (copy_from_user((void*)&mbox->cmd, u_cmd, sizeof(ppp_cmd_t)))
684 return -EFAULT;
685
686 len = mbox->cmd.length;
687
688 if (len) {
689
690 if( copy_from_user((void*)&mbox->data, u_data, len))
691 return -EFAULT;
692
693 }
694
695 /* execute command */
696 if (!sdla_exec(mbox))
697 return -EIO;
698
699 /* return result */
700 if( copy_to_user(u_cmd, (void*)&mbox->cmd, sizeof(ppp_cmd_t)))
701 return -EFAULT;
702 len = mbox->cmd.length;
703
704 if (len && u_data && copy_to_user(u_data, (void*)&mbox->data, len))
705 return -EFAULT;
706
707 #else
708
709 if (!u_cmd || verify_area(VERIFY_WRITE, u_cmd, sizeof(ppp_cmd_t)))
710 return -EFAULT;
711
712 memcpy_fromfs((void*)&mbox->cmd, u_cmd, sizeof(ppp_cmd_t));
713
714 len = mbox->cmd.length;
715
716 if (len) {
717
718 if (!u_data || verify_area(VERIFY_READ, u_data, len))
719 return -EFAULT;
720 }
721
722 /* execute command */
723 if (!sdla_exec(mbox))
724 return -EIO;
725
726 /* return result */
727 memcpy_tofs(u_cmd, (void*)&mbox->cmd, sizeof(ppp_cmd_t));
728 len = mbox->cmd.length;
729
730 if (len && u_data && !verify_area(VERIFY_WRITE, u_data, len))
731 memcpy_tofs(u_data, (void*)&mbox->data, len);
732
733
734 #endif
735
736 return 0;
737 }
738
739 /****** Network Device Interface ********************************************/
740
741 /*============================================================================
742 * Initialize Linux network interface.
743 *
744 * This routine is called only once for each interface, during Linux network
745 * interface registration. Returning anything but zero will fail interface
746 * registration.
747 */
748 static int if_init(netdevice_t *dev)
749 {
750 ppp_private_area_t *ppp_priv_area = dev->priv;
751 sdla_t *card = ppp_priv_area->card;
752 wan_device_t *wandev = &card->wandev;
753 #ifdef LINUX_2_0
754 int i;
755 #endif
756
757 /* Initialize device driver entry points */
758 dev->open = &if_open;
759 dev->stop = &if_close;
760 dev->hard_header = &if_header;
761 dev->rebuild_header = &if_rebuild_hdr;
762 dev->hard_start_xmit = &if_send;
763 dev->get_stats = &if_stats;
764 #ifdef LINUX_2_4
765 dev->tx_timeout = &if_tx_timeout;
766 dev->watchdog_timeo = TX_TIMEOUT;
767 #endif
768
769 /* Initialize media-specific parameters */
770 dev->type = ARPHRD_PPP; /* ARP h/w type */
771 dev->flags |= IFF_POINTOPOINT;
772 dev->flags |= IFF_NOARP;
773
774 /* Enable Mulitcasting if specified by user*/
775 if (ppp_priv_area->mc == WANOPT_YES){
776 dev->flags |= IFF_MULTICAST;
777 }
778
779 #ifdef LINUX_2_0
780 dev->family = AF_INET;
781 #endif
782 dev->mtu = wandev->mtu;
783 dev->hard_header_len = PPP_HDR_LEN; /* media header length */
784
785 /* Initialize hardware parameters (just for reference) */
786 dev->irq = wandev->irq;
787 dev->dma = wandev->dma;
788 dev->base_addr = wandev->ioport;
789 dev->mem_start = wandev->maddr;
790 dev->mem_end = wandev->maddr + wandev->msize - 1;
791
792 /* Set transmit buffer queue length */
793 dev->tx_queue_len = 100;
794
795 /* Initialize socket buffers */
796 #if !defined(LINUX_2_1) && !defined(LINUX_2_4)
797 for (i = 0; i < DEV_NUMBUFFS; ++i)
798 skb_queue_head_init(&dev->buffs[i]);
799 #endif
800
801 return 0;
802 }
803
804 /*============================================================================
805 * Open network interface.
806 * o enable communications and interrupts.
807 * o prevent module from unloading by incrementing use count
808 *
809 * Return 0 if O.k. or errno.
810 */
811 static int if_open (netdevice_t *dev)
812 {
813 ppp_private_area_t *ppp_priv_area = dev->priv;
814 sdla_t *card = ppp_priv_area->card;
815 struct timeval tv;
816 //unsigned long smp_flags;
817
818 if (is_dev_running(dev))
819 return -EBUSY;
820
821 wanpipe_open(card);
822
823 #ifdef LINUX_2_4
824 netif_start_queue(dev);
825 #else
826 dev->interrupt = 0;
827 dev->tbusy = 0;
828 dev->start = 1;
829 #endif
830
831 do_gettimeofday( &tv );
832 ppp_priv_area->router_start_time = tv.tv_sec;
833
834 /* We cannot configure the card here because we don't
835 * have access to the interface IP addresses.
836 * Once the interface initilization is complete, we will be
837 * able to access the IP addresses. Therefore,
838 * configure the ppp link in the poll routine */
839 set_bit(0,&ppp_priv_area->config_ppp);
840 ppp_priv_area->config_wait_timeout=jiffies;
841
842 /* Start the PPP configuration after 1sec delay.
843 * This will give the interface initilization time
844 * to finish its configuration */
845 del_timer(&ppp_priv_area->poll_delay_timer);
846 ppp_priv_area->poll_delay_timer.expires = jiffies+HZ;
847 add_timer(&ppp_priv_area->poll_delay_timer);
848 return 0;
849 }
850
851 /*============================================================================
852 * Close network interface.
853 * o if this is the last open, then disable communications and interrupts.
854 * o reset flags.
855 */
856 static int if_close(netdevice_t *dev)
857 {
858 ppp_private_area_t *ppp_priv_area = dev->priv;
859 sdla_t *card = ppp_priv_area->card;
860
861 stop_net_queue(dev);
862 #ifndef LINUX_2_4
863 dev->start=0;
864 #endif
865 wanpipe_close(card);
866
867 del_timer (&ppp_priv_area->poll_delay_timer);
868 return 0;
869 }
870
871 /*============================================================================
872 * Build media header.
873 *
874 * The trick here is to put packet type (Ethertype) into 'protocol' field of
875 * the socket buffer, so that we don't forget it. If packet type is not
876 * supported, set skb->protocol to 0 and discard packet later.
877 *
878 * Return: media header length.
879 */
880 static int if_header(struct sk_buff *skb, netdevice_t *dev,
881 unsigned short type, void *daddr, void *saddr, unsigned len)
882 {
883 switch (type)
884 {
885 case ETH_P_IP:
886 case ETH_P_IPX:
887 skb->protocol = htons(type);
888 break;
889
890 default:
891 skb->protocol = 0;
892 }
893
894 return PPP_HDR_LEN;
895 }
896
897 /*============================================================================
898 * Re-build media header.
899 *
900 * Return: 1 physical address resolved.
901 * 0 physical address not resolved
902 */
903 #if defined(LINUX_2_1) || defined(LINUX_2_4)
904 static int if_rebuild_hdr (struct sk_buff *skb)
905 {
906 netdevice_t *dev = skb->dev;
907 ppp_private_area_t *ppp_priv_area = dev->priv;
908 sdla_t *card = ppp_priv_area->card;
909
910 printk(KERN_INFO "%s: rebuild_header() called for interface %s!\n",
911 card->devname, dev->name);
912 return 1;
913 }
914
915 #else
916 static int if_rebuild_hdr (void* hdr, netdevice_t* dev, unsigned long raddr,
917 struct sk_buff* skb)
918 {
919 return 1;
920
921 }
922 #endif
923
924 #ifdef LINUX_2_4
925 /*============================================================================
926 * Handle transmit timeout event from netif watchdog
927 */
928 static void if_tx_timeout (netdevice_t *dev)
929 {
930 ppp_private_area_t* chan = dev->priv;
931 sdla_t *card = chan->card;
932
933 /* If our device stays busy for at least 5 seconds then we will
934 * kick start the device by making dev->tbusy = 0. We expect
935 * that our device never stays busy more than 5 seconds. So this
936 * is only used as a last resort.
937 */
938
939 ++ chan->if_send_stat.if_send_tbusy;
940 ++card->wandev.stats.collisions;
941
942 printk (KERN_INFO "%s: Transmit timed out on %s\n", card->devname,dev->name);
943 ++chan->if_send_stat.if_send_tbusy_timeout;
944 netif_wake_queue (dev);
945 }
946 #endif
947
948
949
950 /*============================================================================
951 * Send a packet on a network interface.
952 * o set tbusy flag (marks start of the transmission) to block a timer-based
953 * transmit from overlapping.
954 * o check link state. If link is not up, then drop the packet.
955 * o execute adapter send command.
956 * o free socket buffer
957 *
958 * Return: 0 complete (socket buffer must be freed)
959 * non-0 packet may be re-transmitted (tbusy must be set)
960 *
961 * Notes:
962 * 1. This routine is called either by the protocol stack or by the "net
963 * bottom half" (with interrupts enabled).
964 * 2. Setting tbusy flag will inhibit further transmit requests from the
965 * protocol stack and can be used for flow control with protocol layer.
966 */
967 static int if_send (struct sk_buff *skb, netdevice_t *dev)
968 {
969 ppp_private_area_t *ppp_priv_area = dev->priv;
970 sdla_t *card = ppp_priv_area->card;
971 unsigned char *sendpacket;
972 unsigned long smp_flags;
973 ppp_flags_t *flags = card->flags;
974 int udp_type;
975 int err=0;
976
977 ++ppp_priv_area->if_send_stat.if_send_entry;
978
979 #ifdef LINUX_2_4
980 netif_stop_queue(dev);
981 #endif
982
983 if (skb == NULL) {
984
985 /* If we get here, some higher layer thinks we've missed an
986 * tx-done interrupt.
987 */
988 printk(KERN_INFO "%s: interface %s got kicked!\n",
989 card->devname, dev->name);
990
991 ++ppp_priv_area->if_send_stat.if_send_skb_null;
992
993 wake_net_dev(dev);
994 return 0;
995 }
996
997 #ifndef LINUX_2_4
998 if (dev->tbusy) {
999
1000 /* If our device stays busy for at least 5 seconds then we will
1001 * kick start the device by making dev->tbusy = 0. We expect
1002 * that our device never stays busy more than 5 seconds. So this
1003 * is only used as a last resort.
1004 */
1005
1006 ++ppp_priv_area->if_send_stat.if_send_tbusy;
1007 ++card->wandev.stats.collisions;
1008
1009 if ((jiffies - ppp_priv_area->tick_counter) < (5*HZ)) {
1010 return 1;
1011 }
1012
1013 printk (KERN_INFO "%s: Transmit times out on %s\n",card->devname,dev->name);
1014
1015 ++ppp_priv_area->if_send_stat.if_send_tbusy_timeout;
1016 ++card->wandev.stats.collisions;
1017
1018 /* unbusy the card (because only one interface per card)*/
1019 dev->tbusy = 0;
1020 }
1021 #endif
1022
1023 sendpacket = skb->data;
1024
1025 udp_type = udp_pkt_type( skb, card );
1026
1027
1028 if (udp_type == UDP_PTPIPE_TYPE){
1029 if(store_udp_mgmt_pkt(UDP_PKT_FRM_STACK, card, skb, dev,
1030 ppp_priv_area)){
1031 flags->imask |= PPP_INTR_TIMER;
1032 }
1033 ++ppp_priv_area->if_send_stat.if_send_PIPE_request;
1034 start_net_queue(dev);
1035 return 0;
1036 }
1037
1038 /* Check for broadcast and multicast addresses
1039 * If found, drop (deallocate) a packet and return.
1040 */
1041 if(chk_bcast_mcast_addr(card, dev, skb)){
1042 ++card->wandev.stats.tx_dropped;
1043 wan_dev_kfree_skb(skb,FREE_WRITE);
1044 start_net_queue(dev);
1045 return 0;
1046 }
1047
1048
1049 if(card->hw.type != SDLA_S514){
1050 s508_lock(card,&smp_flags);
1051 }
1052
1053 if (test_and_set_bit(SEND_CRIT, (void*)&card->wandev.critical)) {
1054
1055 printk(KERN_INFO "%s: Critical in if_send: %lx\n",
1056 card->wandev.name,card->wandev.critical);
1057
1058 ++card->wandev.stats.tx_dropped;
1059 ++ppp_priv_area->if_send_stat.if_send_critical_non_ISR;
1060 start_net_queue(dev);
1061 goto if_send_exit_crit;
1062 }
1063
1064 if (card->wandev.state != WAN_CONNECTED) {
1065
1066 ++ppp_priv_area->if_send_stat.if_send_wan_disconnected;
1067 ++card->wandev.stats.tx_dropped;
1068 start_net_queue(dev);
1069
1070 } else if (!skb->protocol) {
1071 ++ppp_priv_area->if_send_stat.if_send_protocol_error;
1072 ++card->wandev.stats.tx_errors;
1073 start_net_queue(dev);
1074
1075 } else {
1076
1077 /*If it's IPX change the network numbers to 0 if they're ours.*/
1078 if( skb->protocol == htons(ETH_P_IPX) ) {
1079 if(ppp_priv_area->enable_IPX) {
1080 switch_net_numbers( skb->data,
1081 ppp_priv_area->network_number, 0);
1082 } else {
1083 ++card->wandev.stats.tx_dropped;
1084 start_net_queue(dev);
1085 goto if_send_exit_crit;
1086 }
1087 }
1088
1089 if (ppp_send(card, skb->data, skb->len, skb->protocol)) {
1090 stop_net_queue(dev);
1091 ++ppp_priv_area->if_send_stat.if_send_adptr_bfrs_full;
1092 ++ppp_priv_area->if_send_stat.if_send_tx_int_enabled;
1093 } else {
1094 ++ppp_priv_area->if_send_stat.if_send_bfr_passed_to_adptr;
1095 ++card->wandev.stats.tx_packets;
1096 #if defined(LINUX_2_1) || defined(LINUX_2_4)
1097 card->wandev.stats.tx_bytes += skb->len;
1098 #endif
1099 start_net_queue(dev);
1100 #ifdef LINUX_2_4
1101 dev->trans_start = jiffies;
1102 #endif
1103 }
1104 }
1105
1106 if_send_exit_crit:
1107
1108 if (!(err=is_queue_stopped(dev))){
1109 wan_dev_kfree_skb(skb, FREE_WRITE);
1110 }else{
1111 ppp_priv_area->tick_counter = jiffies;
1112 flags->imask |= PPP_INTR_TXRDY; /* unmask Tx interrupts */
1113 }
1114
1115 clear_bit(SEND_CRIT,&card->wandev.critical);
1116 if(card->hw.type != SDLA_S514){
1117 s508_unlock(card,&smp_flags);
1118 }
1119
1120 return err;
1121 }
1122
1123
1124 /*=============================================================================
1125 * Store a UDP management packet for later processing.
1126 */
1127
1128 static int store_udp_mgmt_pkt(char udp_pkt_src, sdla_t* card,
1129 struct sk_buff *skb, netdevice_t* dev,
1130 ppp_private_area_t* ppp_priv_area )
1131 {
1132 int udp_pkt_stored = 0;
1133
1134 if(!ppp_priv_area->udp_pkt_lgth && (skb->len<=MAX_LGTH_UDP_MGNT_PKT)){
1135 ppp_priv_area->udp_pkt_lgth = skb->len;
1136 ppp_priv_area->udp_pkt_src = udp_pkt_src;
1137 memcpy(ppp_priv_area->udp_pkt_data, skb->data, skb->len);
1138 ppp_priv_area->timer_int_enabled |= TMR_INT_ENABLED_UDP;
1139 ppp_priv_area->protocol = skb->protocol;
1140 udp_pkt_stored = 1;
1141 }else{
1142 if (skb->len > MAX_LGTH_UDP_MGNT_PKT){
1143 #if defined(LINUX_2_1) || defined(LINUX_2_4)
1144 printk(KERN_INFO "%s: PIPEMON UDP request too long : %i\n",
1145 card->devname, skb->len);
1146 #else
1147 printk(KERN_INFO "%s: PIPEMON UDP request too long : %li\n",
1148 card->devname, skb->len);
1149 #endif
1150 }else{
1151 printk(KERN_INFO "%s: PIPEMON UPD request already pending\n",
1152 card->devname);
1153 }
1154 ppp_priv_area->udp_pkt_lgth = 0;
1155 }
1156
1157 if(udp_pkt_src == UDP_PKT_FRM_STACK){
1158 wan_dev_kfree_skb(skb, FREE_WRITE);
1159 }else{
1160 wan_dev_kfree_skb(skb, FREE_READ);
1161 }
1162
1163 return(udp_pkt_stored);
1164 }
1165
1166
1167
1168 /*============================================================================
1169 * Reply to UDP Management system.
1170 * Return length of reply.
1171 */
1172 static int reply_udp( unsigned char *data, unsigned int mbox_len )
1173 {
1174 unsigned short len, udp_length, temp, ip_length;
1175 unsigned long ip_temp;
1176 int even_bound = 0;
1177 ppp_udp_pkt_t *p_udp_pkt = (ppp_udp_pkt_t *)data;
1178
1179 /* Set length of packet */
1180 len = sizeof(ip_pkt_t)+
1181 sizeof(udp_pkt_t)+
1182 sizeof(wp_mgmt_t)+
1183 sizeof(cblock_t)+
1184 mbox_len;
1185
1186 /* fill in UDP reply */
1187 p_udp_pkt->wp_mgmt.request_reply = UDPMGMT_REPLY;
1188
1189 /* fill in UDP length */
1190 udp_length = sizeof(udp_pkt_t)+
1191 sizeof(wp_mgmt_t)+
1192 sizeof(cblock_t)+
1193 mbox_len;
1194
1195
1196 /* put it on an even boundary */
1197 if ( udp_length & 0x0001 ) {
1198 udp_length += 1;
1199 len += 1;
1200 even_bound=1;
1201 }
1202
1203 temp = (udp_length<<8)|(udp_length>>8);
1204 p_udp_pkt->udp_pkt.udp_length = temp;
1205
1206
1207 /* swap UDP ports */
1208 temp = p_udp_pkt->udp_pkt.udp_src_port;
1209 p_udp_pkt->udp_pkt.udp_src_port =
1210 p_udp_pkt->udp_pkt.udp_dst_port;
1211 p_udp_pkt->udp_pkt.udp_dst_port = temp;
1212
1213
1214 /* add UDP pseudo header */
1215 temp = 0x1100;
1216 *((unsigned short *)(p_udp_pkt->data+mbox_len+even_bound)) = temp;
1217 temp = (udp_length<<8)|(udp_length>>8);
1218 *((unsigned short *)(p_udp_pkt->data+mbox_len+even_bound+2)) = temp;
1219
1220 /* calculate UDP checksum */
1221 p_udp_pkt->udp_pkt.udp_checksum = 0;
1222 p_udp_pkt->udp_pkt.udp_checksum =
1223 calc_checksum(&data[UDP_OFFSET],udp_length+UDP_OFFSET);
1224
1225 /* fill in IP length */
1226 ip_length = udp_length + sizeof(ip_pkt_t);
1227 temp = (ip_length<<8)|(ip_length>>8);
1228 p_udp_pkt->ip_pkt.total_length = temp;
1229
1230 /* swap IP addresses */
1231 ip_temp = p_udp_pkt->ip_pkt.ip_src_address;
1232 p_udp_pkt->ip_pkt.ip_src_address = p_udp_pkt->ip_pkt.ip_dst_address;
1233 p_udp_pkt->ip_pkt.ip_dst_address = ip_temp;
1234
1235 /* fill in IP checksum */
1236 p_udp_pkt->ip_pkt.hdr_checksum = 0;
1237 p_udp_pkt->ip_pkt.hdr_checksum = calc_checksum(data,sizeof(ip_pkt_t));
1238
1239 return len;
1240
1241 } /* reply_udp */
1242
1243 unsigned short calc_checksum (char *data, int len)
1244 {
1245 unsigned short temp;
1246 unsigned long sum=0;
1247 int i;
1248
1249 for( i = 0; i <len; i+=2 ) {
1250 memcpy(&temp,&data[i],2);
1251 sum += (unsigned long)temp;
1252 }
1253
1254 while (sum >> 16 ) {
1255 sum = (sum & 0xffffUL) + (sum >> 16);
1256 }
1257
1258 temp = (unsigned short)sum;
1259 temp = ~temp;
1260
1261 if( temp == 0 )
1262 temp = 0xffff;
1263
1264 return temp;
1265 }
1266
1267 /*
1268 If incoming is 0 (outgoing)- if the net numbers is ours make it 0
1269 if incoming is 1 - if the net number is 0 make it ours
1270
1271 */
1272 static void switch_net_numbers(unsigned char *sendpacket, unsigned long network_number, unsigned char incoming)
1273 {
1274 unsigned long pnetwork_number;
1275
1276 pnetwork_number = (unsigned long)((sendpacket[6] << 24) +
1277 (sendpacket[7] << 16) + (sendpacket[8] << 8) +
1278 sendpacket[9]);
1279
1280 if (!incoming) {
1281 //If the destination network number is ours, make it 0
1282 if( pnetwork_number == network_number) {
1283 sendpacket[6] = sendpacket[7] = sendpacket[8] =
1284 sendpacket[9] = 0x00;
1285 }
1286 } else {
1287 //If the incoming network is 0, make it ours
1288 if( pnetwork_number == 0) {
1289 sendpacket[6] = (unsigned char)(network_number >> 24);
1290 sendpacket[7] = (unsigned char)((network_number &
1291 0x00FF0000) >> 16);
1292 sendpacket[8] = (unsigned char)((network_number &
1293 0x0000FF00) >> 8);
1294 sendpacket[9] = (unsigned char)(network_number &
1295 0x000000FF);
1296 }
1297 }
1298
1299
1300 pnetwork_number = (unsigned long)((sendpacket[18] << 24) +
1301 (sendpacket[19] << 16) + (sendpacket[20] << 8) +
1302 sendpacket[21]);
1303
1304 if( !incoming ) {
1305 //If the source network is ours, make it 0
1306 if( pnetwork_number == network_number) {
1307 sendpacket[18] = sendpacket[19] = sendpacket[20] =
1308 sendpacket[21] = 0x00;
1309 }
1310 } else {
1311 //If the source network is 0, make it ours
1312 if( pnetwork_number == 0 ) {
1313 sendpacket[18] = (unsigned char)(network_number >> 24);
1314 sendpacket[19] = (unsigned char)((network_number &
1315 0x00FF0000) >> 16);
1316 sendpacket[20] = (unsigned char)((network_number &
1317 0x0000FF00) >> 8);
1318 sendpacket[21] = (unsigned char)(network_number &
1319 0x000000FF);
1320 }
1321 }
1322 } /* switch_net_numbers */
1323
1324 /*============================================================================
1325 * Get ethernet-style interface statistics.
1326 * Return a pointer to struct net_device_stats.
1327 */
1328 #if defined(LINUX_2_1) || defined(LINUX_2_4)
1329 static struct net_device_stats *if_stats(netdevice_t *dev)
1330 #else
1331 static struct enet_statistics *if_stats(netdevice_t *dev)
1332 #endif
1333 {
1334
1335 ppp_private_area_t *ppp_priv_area = dev->priv;
1336 sdla_t* card;
1337
1338 if( ppp_priv_area == NULL )
1339 return NULL;
1340
1341 card = ppp_priv_area->card;
1342 return &card->wandev.stats;
1343 }
1344
1345 /****** PPP Firmware Interface Functions ************************************/
1346
1347 /*============================================================================
1348 * Read firmware code version.
1349 * Put code version as ASCII string in str.
1350 */
1351 static int ppp_read_version(sdla_t *card, char *str)
1352 {
1353 ppp_mbox_t *mb = card->mbox;
1354 int err;
1355
1356 memset(&mb->cmd, 0, sizeof(ppp_cmd_t));
1357 mb->cmd.command = PPP_READ_CODE_VERSION;
1358 err = sdla_exec(mb) ? mb->cmd.result : CMD_TIMEOUT;
1359
1360 if (err != CMD_OK)
1361
1362 ppp_error(card, err, mb);
1363
1364 else if (str) {
1365
1366 int len = mb->cmd.length;
1367
1368 memcpy(str, mb->data, len);
1369 str[len] = '\0';
1370
1371 }
1372
1373 return err;
1374 }
1375 /*===========================================================================
1376 * Set Out-Bound Authentication.
1377 */
1378 static int ppp_set_outbnd_auth (sdla_t *card, ppp_private_area_t *ppp_priv_area)
1379 {
1380 ppp_mbox_t *mb = card->mbox;
1381 int err;
1382
1383 memset(&mb->cmd, 0, sizeof(ppp_cmd_t));
1384 memset(&mb->data, 0, (strlen(ppp_priv_area->userid) +
1385 strlen(ppp_priv_area->passwd) + 2 ) );
1386 memcpy(mb->data, ppp_priv_area->userid, strlen(ppp_priv_area->userid));
1387 memcpy((mb->data + strlen(ppp_priv_area->userid) + 1),
1388 ppp_priv_area->passwd, strlen(ppp_priv_area->passwd));
1389
1390 mb->cmd.length = strlen(ppp_priv_area->userid) +
1391 strlen(ppp_priv_area->passwd) + 2 ;
1392
1393 mb->cmd.command = PPP_SET_OUTBOUND_AUTH;
1394
1395 err = sdla_exec(mb) ? mb->cmd.result : CMD_TIMEOUT;
1396
1397 if (err != CMD_OK)
1398 ppp_error(card, err, mb);
1399
1400 return err;
1401 }
1402
1403 /*===========================================================================
1404 * Set In-Bound Authentication.
1405 */
1406 static int ppp_set_inbnd_auth (sdla_t *card, ppp_private_area_t *ppp_priv_area)
1407 {
1408 ppp_mbox_t *mb = card->mbox;
1409 int err, i;
1410 char* user_tokens[32];
1411 char* pass_tokens[32];
1412 int userids, passwds;
1413 int add_ptr;
1414
1415 memset(&mb->cmd, 0, sizeof(ppp_cmd_t));
1416 memset(&mb->data, 0, 1008);
1417 memcpy(mb->data, ppp_priv_area->sysname,
1418 strlen(ppp_priv_area->sysname));
1419
1420 /* Parse the userid string and the password string and build a string
1421 to copy it to the data area of the command structure. The string
1422 will look like "SYS_NAME<NULL>USER1<NULL>PASS1<NULL>USER2<NULL>PASS2
1423 ....<NULL> "
1424 */
1425 userids = tokenize( ppp_priv_area->userid, user_tokens);
1426 passwds = tokenize( ppp_priv_area->passwd, pass_tokens);
1427
1428 if (userids != passwds){
1429 printk(KERN_INFO "%s: Number of passwords does not equal the number of user ids\n", card->devname);
1430 return 1;
1431 }
1432
1433 add_ptr = strlen(ppp_priv_area->sysname) + 1;
1434 for (i=0; i<userids; i++){
1435 memcpy((mb->data + add_ptr), user_tokens[i],
1436 strlen(user_tokens[i]));
1437 memcpy((mb->data + add_ptr + strlen(user_tokens[i]) + 1),
1438 pass_tokens[i], strlen(pass_tokens[i]));
1439 add_ptr = add_ptr + strlen(user_tokens[i]) + 1 +
1440 strlen(pass_tokens[i]) + 1;
1441 }
1442
1443 mb->cmd.length = add_ptr + 1;
1444 mb->cmd.command = PPP_SET_INBOUND_AUTH;
1445
1446 err = sdla_exec(mb) ? mb->cmd.result : CMD_TIMEOUT;
1447
1448 if (err != CMD_OK)
1449 ppp_error(card, err, mb);
1450
1451 return err;
1452 }
1453
1454
1455 /*============================================================================
1456 * Tokenize string.
1457 * Parse a string of the following syntax:
1458 * <arg1>,<arg2>,...
1459 * and fill array of tokens with pointers to string elements.
1460 *
1461 */
1462 static int tokenize (char *str, char **tokens)
1463 {
1464 int cnt = 0;
1465
1466 tokens[0] = strtok(str, "/");
1467 while (tokens[cnt] && (cnt < 32 - 1))
1468 {
1469 tokens[cnt] = strstrip(tokens[cnt], " \t");
1470 tokens[++cnt] = strtok(NULL, "/");
1471 }
1472 return cnt;
1473 }
1474
1475 /*============================================================================
1476 * Strip leading and trailing spaces off the string str.
1477 */
1478 static char* strstrip (char *str, char* s)
1479 {
1480 char *eos = str + strlen(str); /* -> end of string */
1481
1482 while (*str && strchr(s, *str))
1483 ++str /* strip leading spaces */
1484 ;
1485 while ((eos > str) && strchr(s, *(eos - 1)))
1486 --eos /* strip trailing spaces */
1487 ;
1488 *eos = '\0';
1489 return str;
1490 }
1491 /*============================================================================
1492 * Configure PPP firmware.
1493 */
1494 static int ppp_configure(sdla_t *card, void *data)
1495 {
1496 ppp_mbox_t *mb = card->mbox;
1497 int data_len = sizeof(ppp508_conf_t);
1498 int err;
1499
1500 memset(&mb->cmd, 0, sizeof(ppp_cmd_t));
1501 memcpy(mb->data, data, data_len);
1502 mb->cmd.length = data_len;
1503 mb->cmd.command = PPP_SET_CONFIG;
1504 err = sdla_exec(mb) ? mb->cmd.result : CMD_TIMEOUT;
1505
1506 if (err != CMD_OK)
1507 ppp_error(card, err, mb);
1508
1509 return err;
1510 }
1511
1512 /*============================================================================
1513 * Set interrupt mode.
1514 */
1515 static int ppp_set_intr_mode(sdla_t *card, unsigned char mode)
1516 {
1517 ppp_mbox_t *mb = card->mbox;
1518 ppp_intr_info_t *ppp_intr_data = (ppp_intr_info_t *) &mb->data[0];
1519 int err;
1520
1521 memset(&mb->cmd, 0, sizeof(ppp_cmd_t));
1522 ppp_intr_data->i_enable = mode;
1523
1524 ppp_intr_data->irq = card->hw.irq;
1525 mb->cmd.length = 2;
1526
1527 /* If timer has been enabled, set the timer delay to 1sec */
1528 if (mode & 0x80){
1529 ppp_intr_data->timer_len = 250; //5;//100; //250;
1530 mb->cmd.length = 4;
1531 }
1532
1533 mb->cmd.command = PPP_SET_INTR_FLAGS;
1534 err = sdla_exec(mb) ? mb->cmd.result : CMD_TIMEOUT;
1535
1536 if (err != CMD_OK)
1537 ppp_error(card, err, mb);
1538
1539
1540 return err;
1541 }
1542
1543 /*============================================================================
1544 * Enable communications.
1545 */
1546 static int ppp_comm_enable(sdla_t *card)
1547 {
1548 ppp_mbox_t *mb = card->mbox;
1549 int err;
1550
1551 memset(&mb->cmd, 0, sizeof(ppp_cmd_t));
1552 mb->cmd.command = PPP_COMM_ENABLE;
1553 err = sdla_exec(mb) ? mb->cmd.result : CMD_TIMEOUT;
1554
1555 if (err != CMD_OK)
1556 ppp_error(card, err, mb);
1557 else
1558 card->u.p.comm_enabled = 1;
1559
1560 return err;
1561 }
1562
1563 /*============================================================================
1564 * Disable communications.
1565 */
1566 static int ppp_comm_disable(sdla_t *card)
1567 {
1568 ppp_mbox_t *mb = card->mbox;
1569 int err;
1570
1571 memset(&mb->cmd, 0, sizeof(ppp_cmd_t));
1572 mb->cmd.command = PPP_COMM_DISABLE;
1573 err = sdla_exec(mb) ? mb->cmd.result : CMD_TIMEOUT;
1574 if (err != CMD_OK)
1575 ppp_error(card, err, mb);
1576 else
1577 card->u.p.comm_enabled = 0;
1578
1579 return err;
1580 }
1581
1582 static int ppp_comm_disable_shutdown(sdla_t *card)
1583 {
1584 ppp_mbox_t *mb = card->mbox;
1585 ppp_intr_info_t *ppp_intr_data;
1586 int err;
1587
1588 if (!mb){
1589 return 1;
1590 }
1591
1592 ppp_intr_data = (ppp_intr_info_t *) &mb->data[0];
1593
1594 /* Disable all interrupts */
1595 memset(&mb->cmd, 0, sizeof(ppp_cmd_t));
1596 ppp_intr_data->i_enable = 0;
1597
1598 ppp_intr_data->irq = card->hw.irq;
1599 mb->cmd.length = 2;
1600
1601 mb->cmd.command = PPP_SET_INTR_FLAGS;
1602 err = sdla_exec(mb) ? mb->cmd.result : CMD_TIMEOUT;
1603
1604 /* Disable communicatinons */
1605 memset(&mb->cmd, 0, sizeof(ppp_cmd_t));
1606 mb->cmd.command = PPP_COMM_DISABLE;
1607 err = sdla_exec(mb) ? mb->cmd.result : CMD_TIMEOUT;
1608
1609 card->u.p.comm_enabled = 0;
1610
1611 return 0;
1612 }
1613
1614
1615
1616 /*============================================================================
1617 * Get communications error statistics.
1618 */
1619 static int ppp_get_err_stats(sdla_t *card)
1620 {
1621 ppp_mbox_t *mb = card->mbox;
1622 int err;
1623
1624 memset(&mb->cmd, 0, sizeof(ppp_cmd_t));
1625 mb->cmd.command = PPP_READ_ERROR_STATS;
1626 err = sdla_exec(mb) ? mb->cmd.result : CMD_TIMEOUT;
1627
1628 if (err == CMD_OK) {
1629
1630 ppp_err_stats_t* stats = (void*)mb->data;
1631 card->wandev.stats.rx_over_errors = stats->rx_overrun;
1632 card->wandev.stats.rx_crc_errors = stats->rx_bad_crc;
1633 card->wandev.stats.rx_missed_errors = stats->rx_abort;
1634 card->wandev.stats.rx_length_errors = stats->rx_lost;
1635 card->wandev.stats.tx_aborted_errors = stats->tx_abort;
1636
1637 } else
1638 ppp_error(card, err, mb);
1639
1640 return err;
1641 }
1642
1643 /*============================================================================
1644 * Send packet.
1645 * Return: 0 - o.k.
1646 * 1 - no transmit buffers available
1647 */
1648 static int ppp_send (sdla_t *card, void *data, unsigned len, unsigned proto)
1649 {
1650 ppp_buf_ctl_t *txbuf = card->u.p.txbuf;
1651
1652 if (txbuf->flag)
1653 return 1;
1654
1655 sdla_poke(&card->hw, txbuf->buf.ptr, data, len);
1656
1657 txbuf->length = len; /* frame length */
1658
1659 if (proto == htons(ETH_P_IPX))
1660 txbuf->proto = 0x01; /* protocol ID */
1661 else
1662 txbuf->proto = 0x00; /* protocol ID */
1663
1664 txbuf->flag = 1; /* start transmission */
1665
1666 /* Update transmit buffer control fields */
1667 card->u.p.txbuf = ++txbuf;
1668
1669 if ((void*)txbuf > card->u.p.txbuf_last)
1670 card->u.p.txbuf = card->u.p.txbuf_base;
1671
1672 return 0;
1673 }
1674
1675 /****** Firmware Error Handler **********************************************/
1676
1677 /*============================================================================
1678 * Firmware error handler.
1679 * This routine is called whenever firmware command returns non-zero
1680 * return code.
1681 *
1682 * Return zero if previous command has to be cancelled.
1683 */
1684 static int ppp_error(sdla_t *card, int err, ppp_mbox_t *mb)
1685 {
1686 unsigned cmd = mb->cmd.command;
1687
1688 switch (err) {
1689
1690 case CMD_TIMEOUT:
1691 printk(KERN_ERR "%s: command 0x%02X timed out!\n",
1692 card->devname, cmd);
1693 break;
1694
1695 default:
1696 printk(KERN_INFO "%s: command 0x%02X returned 0x%02X!\n"
1697 , card->devname, cmd, err);
1698 }
1699
1700 return 0;
1701 }
1702
1703 /****** Interrupt Handlers **************************************************/
1704
1705 /*============================================================================
1706 * PPP interrupt service routine.
1707 */
1708 static void wpp_isr (sdla_t *card)
1709 {
1710 ppp_flags_t *flags = card->flags;
1711 char *ptr = &flags->iflag;
1712 netdevice_t *dev = card->wandev.dev;
1713 int i;
1714
1715 card->in_isr = 1;
1716 ++card->statistics.isr_entry;
1717
1718 if (!dev && flags->iflag != PPP_INTR_CMD){
1719 card->in_isr = 0;
1720 flags->iflag = 0;
1721 return;
1722 }
1723
1724 if (test_bit(PERI_CRIT, (void*)&card->wandev.critical)) {
1725 card->in_isr = 0;
1726 flags->iflag = 0;
1727 return;
1728 }
1729
1730
1731 if(card->hw.type != SDLA_S514){
1732 if (test_bit(SEND_CRIT, (void*)&card->wandev.critical)) {
1733 ++card->statistics.isr_already_critical;
1734 printk (KERN_INFO "%s: Critical while in ISR!\n",
1735 card->devname);
1736 card->in_isr = 0;
1737 flags->iflag = 0;
1738 return;
1739 }
1740 }
1741
1742 switch (flags->iflag) {
1743
1744 case PPP_INTR_RXRDY: /* receive interrupt 0x01 (bit 0)*/
1745 ++card->statistics.isr_rx;
1746 rx_intr(card);
1747 break;
1748
1749 case PPP_INTR_TXRDY: /* transmit interrupt 0x02 (bit 1)*/
1750 ++card->statistics.isr_tx;
1751 flags->imask &= ~PPP_INTR_TXRDY;
1752 wake_net_dev(dev);
1753 break;
1754
1755 case PPP_INTR_CMD: /* interface command completed */
1756 ++Intr_test_counter;
1757 ++card->statistics.isr_intr_test;
1758 break;
1759
1760 case PPP_INTR_MODEM: /* modem status change (DCD, CTS) 0x04 (bit 2)*/
1761 case PPP_INTR_DISC: /* Data link disconnected 0x10 (bit 4)*/
1762 case PPP_INTR_OPEN: /* Data link open 0x20 (bit 5)*/
1763 case PPP_INTR_DROP_DTR: /* DTR drop timeout expired 0x40 bit 6 */
1764 event_intr(card);
1765 break;
1766
1767 case PPP_INTR_TIMER:
1768 timer_intr(card);
1769 break;
1770
1771 default: /* unexpected interrupt */
1772 ++card->statistics.isr_spurious;
1773 printk(KERN_INFO "%s: spurious interrupt 0x%02X!\n",
1774 card->devname, flags->iflag);
1775 printk(KERN_INFO "%s: ID Bytes = ",card->devname);
1776 for(i = 0; i < 8; i ++)
1777 printk(KERN_INFO "0x%02X ", *(ptr + 0x28 + i));
1778 printk(KERN_INFO "\n");
1779 }
1780
1781 card->in_isr = 0;
1782 flags->iflag = 0;
1783 return;
1784 }
1785
1786 /*============================================================================
1787 * Receive interrupt handler.
1788 */
1789 static void rx_intr(sdla_t *card)
1790 {
1791 ppp_buf_ctl_t *rxbuf = card->rxmb;
1792 netdevice_t *dev = card->wandev.dev;
1793 ppp_private_area_t *ppp_priv_area;
1794 struct sk_buff *skb;
1795 unsigned len;
1796 void *buf;
1797 int i;
1798 ppp_flags_t *flags = card->flags;
1799 char *ptr = &flags->iflag;
1800 int udp_type;
1801
1802
1803 if (rxbuf->flag != 0x01) {
1804
1805 printk(KERN_INFO
1806 "%s: corrupted Rx buffer @ 0x%X, flag = 0x%02X!\n",
1807 card->devname, (unsigned)rxbuf, rxbuf->flag);
1808
1809 printk(KERN_INFO "%s: ID Bytes = ",card->devname);
1810
1811 for(i = 0; i < 8; i ++)
1812 printk(KERN_INFO "0x%02X ", *(ptr + 0x28 + i));
1813 printk(KERN_INFO "\n");
1814
1815 ++card->statistics.rx_intr_corrupt_rx_bfr;
1816
1817
1818 /* Bug Fix: Mar 6 2000
1819 * If we get a corrupted mailbox, it means that driver
1820 * is out of sync with the firmware. There is no recovery.
1821 * If we don't turn off all interrupts for this card
1822 * the machine will crash.
1823 */
1824 printk(KERN_INFO "%s: Critical router failure ...!!!\n", card->devname);
1825 printk(KERN_INFO "Please contact Sangoma Technologies !\n");
1826 ppp_set_intr_mode(card,0);
1827 return;
1828 }
1829
1830 if (dev && is_dev_running(dev) && dev->priv){
1831
1832 len = rxbuf->length;
1833 ppp_priv_area = dev->priv;
1834
1835 /* Allocate socket buffer */
1836 skb = dev_alloc_skb(len);
1837
1838 if (skb != NULL) {
1839
1840 /* Copy data to the socket buffer */
1841 unsigned addr = rxbuf->buf.ptr;
1842
1843 if ((addr + len) > card->u.p.rx_top + 1) {
1844
1845 unsigned tmp = card->u.p.rx_top - addr + 1;
1846 buf = skb_put(skb, tmp);
1847 sdla_peek(&card->hw, addr, buf, tmp);
1848 addr = card->u.p.rx_base;
1849 len -= tmp;
1850 }
1851 buf = skb_put(skb, len);
1852 sdla_peek(&card->hw, addr, buf, len);
1853
1854 /* Decapsulate packet */
1855 switch (rxbuf->proto) {
1856
1857 case 0x00:
1858 skb->protocol = htons(ETH_P_IP);
1859 break;
1860
1861 case 0x01:
1862 skb->protocol = htons(ETH_P_IPX);
1863 break;
1864 }
1865
1866 udp_type = udp_pkt_type( skb, card );
1867
1868 if (udp_type == UDP_PTPIPE_TYPE){
1869
1870 /* Handle a UDP Request in Timer Interrupt */
1871 if(store_udp_mgmt_pkt(UDP_PKT_FRM_NETWORK, card, skb, dev,
1872 ppp_priv_area)){
1873 flags->imask |= PPP_INTR_TIMER;
1874 }
1875 ++ppp_priv_area->rx_intr_stat.rx_intr_PIPE_request;
1876
1877
1878 } else if (handle_IPXWAN(skb->data,card->devname,
1879 ppp_priv_area->enable_IPX,
1880 ppp_priv_area->network_number,
1881 skb->protocol)) {
1882
1883 /* Handle an IPXWAN packet */
1884 if( ppp_priv_area->enable_IPX) {
1885
1886 /* Make sure we are not already sending */
1887 if (!test_bit(SEND_CRIT, &card->wandev.critical)){
1888 ppp_send(card, skb->data, skb->len, htons(ETH_P_IPX));
1889 }
1890 wan_dev_kfree_skb(skb,FREE_READ);
1891
1892 } else {
1893 ++card->wandev.stats.rx_dropped;
1894 }
1895 } else {
1896 /* Pass data up the protocol stack */
1897 skb->dev = dev;
1898 skb->mac.raw = skb->data;
1899
1900 ++card->wandev.stats.rx_packets;
1901 #if defined(LINUX_2_1) || defined(LINUX_2_4)
1902 card->wandev.stats.rx_bytes += skb->len;
1903 #endif
1904 ++ppp_priv_area->rx_intr_stat.rx_intr_bfr_passed_to_stack;
1905 netif_rx(skb);
1906 }
1907
1908 } else {
1909
1910 if (net_ratelimit()){
1911 printk(KERN_INFO "%s: no socket buffers available!\n",
1912 card->devname);
1913 }
1914 ++card->wandev.stats.rx_dropped;
1915 ++ppp_priv_area->rx_intr_stat.rx_intr_no_socket;
1916 }
1917
1918 } else {
1919 ++card->statistics.rx_intr_dev_not_started;
1920 }
1921
1922 /* Release buffer element and calculate a pointer to the next one */
1923 rxbuf->flag = 0x00;
1924 card->rxmb = ++rxbuf;
1925 if ((void*)rxbuf > card->u.p.rxbuf_last)
1926 card->rxmb = card->u.p.rxbuf_base;
1927 }
1928
1929
1930 void event_intr (sdla_t *card)
1931 {
1932
1933 netdevice_t* dev = card->wandev.dev;
1934 ppp_private_area_t* ppp_priv_area = dev->priv;
1935 volatile ppp_flags_t *flags = card->flags;
1936
1937 switch (flags->iflag){
1938
1939 case PPP_INTR_MODEM: /* modem status change (DCD, CTS) 0x04 (bit 2)*/
1940
1941 if (net_ratelimit()){
1942 printk (KERN_INFO "%s: Modem status: DCD=%s CTS=%s\n",
1943 card->devname, DCD(flags->mstatus), CTS(flags->mstatus));
1944 }
1945 break;
1946
1947 case PPP_INTR_DISC: /* Data link disconnected 0x10 (bit 4)*/
1948
1949 NEX_PRINTK (KERN_INFO "Data link disconnected intr Cause %X\n",
1950 flags->disc_cause);
1951
1952 if (flags->disc_cause &
1953 (PPP_LOCAL_TERMINATION | PPP_DCD_CTS_DROP |
1954 PPP_REMOTE_TERMINATION)) {
1955
1956 if (card->u.p.ip_mode == WANOPT_PPP_PEER) {
1957 set_bit(0,&Read_connection_info);
1958 }
1959 wanpipe_set_state(card, WAN_DISCONNECTED);
1960
1961 show_disc_cause(card, flags->disc_cause);
1962 ppp_priv_area->timer_int_enabled |= TMR_INT_ENABLED_PPP_EVENT;
1963 flags->imask |= PPP_INTR_TIMER;
1964 trigger_ppp_poll(dev);
1965 }
1966 break;
1967
1968 case PPP_INTR_OPEN: /* Data link open 0x20 (bit 5)*/
1969
1970 NEX_PRINTK (KERN_INFO "%s: PPP Link Open, LCP=%s IP=%s\n",
1971 card->devname,LCP(flags->lcp_state),
1972 IP(flags->ip_state));
1973
1974 if (flags->lcp_state == 0x09 &&
1975 (flags->ip_state == 0x09 || flags->ipx_state == 0x09)){
1976
1977 /* Initialize the polling timer and set the state
1978 * to WAN_CONNNECTED */
1979
1980
1981 /* BUG FIX: When the protocol restarts, during heavy
1982 * traffic, board tx buffers and driver tx buffers
1983 * can go out of sync. This checks the condition
1984 * and if the tx buffers are out of sync, the
1985 * protocols are restarted.
1986 * I don't know why the board tx buffer is out
1987 * of sync. It could be that a packets is tx
1988 * while the link is down, but that is not
1989 * possible. The other possiblility is that the
1990 * firmware doesn't reinitialize properly.
1991 * FIXME: A better fix should be found.
1992 */
1993 if (detect_and_fix_tx_bug(card)){
1994
1995 ppp_comm_disable(card);
1996
1997 wanpipe_set_state(card, WAN_DISCONNECTED);
1998
1999 ppp_priv_area->timer_int_enabled |=
2000 TMR_INT_ENABLED_PPP_EVENT;
2001 flags->imask |= PPP_INTR_TIMER;
2002 break;
2003 }
2004
2005 card->state_tick = jiffies;
2006 wanpipe_set_state(card, WAN_CONNECTED);
2007
2008 NEX_PRINTK(KERN_INFO "CON: L Tx: %lx B Tx: %lx || L Rx %lx B Rx %lx\n",
2009 (unsigned long)card->u.p.txbuf, *card->u.p.txbuf_next,
2010 (unsigned long)card->rxmb, *card->u.p.rxbuf_next);
2011
2012 /* Tell timer interrupt that PPP event occured */
2013 ppp_priv_area->timer_int_enabled |= TMR_INT_ENABLED_PPP_EVENT;
2014 flags->imask |= PPP_INTR_TIMER;
2015
2016 /* If we are in PEER mode, we must first obtain the
2017 * IP information and then go into the poll routine */
2018 if (card->u.p.ip_mode != WANOPT_PPP_PEER){
2019 trigger_ppp_poll(dev);
2020 }
2021 }
2022 break;
2023
2024 case PPP_INTR_DROP_DTR: /* DTR drop timeout expired 0x40 bit 6 */
2025
2026 NEX_PRINTK(KERN_INFO "DTR Drop Timeout Interrrupt \n");
2027
2028 if (card->u.p.ip_mode == WANOPT_PPP_PEER) {
2029 set_bit(0,&Read_connection_info);
2030 }
2031
2032 wanpipe_set_state(card, WAN_DISCONNECTED);
2033
2034 show_disc_cause(card, flags->disc_cause);
2035 ppp_priv_area->timer_int_enabled |= TMR_INT_ENABLED_PPP_EVENT;
2036 flags->imask |= PPP_INTR_TIMER;
2037 trigger_ppp_poll(dev);
2038 break;
2039
2040 default:
2041 printk(KERN_INFO "%s: Error, Invalid PPP Event\n",card->devname);
2042 }
2043 }
2044
2045
2046
2047 /* TIMER INTERRUPT */
2048
2049 void timer_intr (sdla_t *card)
2050 {
2051
2052 netdevice_t* dev = card->wandev.dev;
2053 ppp_private_area_t* ppp_priv_area = dev->priv;
2054 ppp_flags_t *flags = card->flags;
2055
2056
2057 if (ppp_priv_area->timer_int_enabled & TMR_INT_ENABLED_CONFIG){
2058 if (!config_ppp(card)){
2059 ppp_priv_area->timer_int_enabled &=
2060 ~TMR_INT_ENABLED_CONFIG;
2061 }
2062 }
2063
2064 /* Update statistics */
2065 if (ppp_priv_area->timer_int_enabled & TMR_INT_ENABLED_UPDATE){
2066 ppp_get_err_stats(card);
2067 if(!(--ppp_priv_area->update_comms_stats)){
2068 ppp_priv_area->timer_int_enabled &=
2069 ~TMR_INT_ENABLED_UPDATE;
2070 }
2071 }
2072
2073 /* PPIPEMON UDP request */
2074
2075 if (ppp_priv_area->timer_int_enabled & TMR_INT_ENABLED_UDP){
2076 process_udp_mgmt_pkt(card,dev, ppp_priv_area);
2077 ppp_priv_area->timer_int_enabled &= ~TMR_INT_ENABLED_UDP;
2078 }
2079
2080 /* PPP Event */
2081 if (ppp_priv_area->timer_int_enabled & TMR_INT_ENABLED_PPP_EVENT){
2082
2083 if (card->wandev.state == WAN_DISCONNECTED){
2084 retrigger_comm(card);
2085 }
2086
2087 /* If the state is CONNECTING, it means that communicatins were
2088 * enabled. When the remote side enables its comminication we
2089 * should get an interrupt PPP_INTR_OPEN, thus turn off polling
2090 */
2091
2092 else if (card->wandev.state == WAN_CONNECTING){
2093 /* Turn off the timer interrupt */
2094 ppp_priv_area->timer_int_enabled &= ~TMR_INT_ENABLED_PPP_EVENT;
2095 }
2096
2097 /* If state is connected and we are in PEER mode
2098 * poll for an IP address which will be provided by remote end.
2099 */
2100 else if ((card->wandev.state == WAN_CONNECTED &&
2101 card->u.p.ip_mode == WANOPT_PPP_PEER) &&
2102 test_bit(0,&Read_connection_info)){
2103
2104 card->state_tick = jiffies;
2105 if (read_connection_info (card)){
2106 printk(KERN_INFO "%s: Failed to read PEER IP Addresses\n",
2107 card->devname);
2108 }else{
2109 clear_bit(0,&Read_connection_info);
2110 set_bit(1,&Read_connection_info);
2111 trigger_ppp_poll(dev);
2112 }
2113 }else{
2114 //FIXME Put the comment back int
2115 ppp_priv_area->timer_int_enabled &= ~TMR_INT_ENABLED_PPP_EVENT;
2116 }
2117
2118 }/* End of PPP_EVENT */
2119
2120
2121 /* Only disable the timer interrupt if there are no udp, statistic */
2122 /* updates or events pending */
2123 if(!ppp_priv_area->timer_int_enabled) {
2124 flags->imask &= ~PPP_INTR_TIMER;
2125 }
2126 }
2127
2128
2129 static int handle_IPXWAN(unsigned char *sendpacket, char *devname, unsigned char enable_IPX, unsigned long network_number, unsigned short proto)
2130 {
2131 int i;
2132
2133 if( proto == htons(ETH_P_IPX) ) {
2134 //It's an IPX packet
2135 if(!enable_IPX) {
2136 //Return 1 so we don't pass it up the stack.
2137 return 1;
2138 }
2139 } else {
2140 //It's not IPX so pass it up the stack.
2141 return 0;
2142 }
2143
2144 if( sendpacket[16] == 0x90 &&
2145 sendpacket[17] == 0x04)
2146 {
2147 //It's IPXWAN
2148
2149 if( sendpacket[2] == 0x02 &&
2150 sendpacket[34] == 0x00)
2151 {
2152 //It's a timer request packet
2153 printk(KERN_INFO "%s: Received IPXWAN Timer Request packet\n",devname);
2154
2155 //Go through the routing options and answer no to every
2156 //option except Unnumbered RIP/SAP
2157 for(i = 41; sendpacket[i] == 0x00; i += 5)
2158 {
2159 //0x02 is the option for Unnumbered RIP/SAP
2160 if( sendpacket[i + 4] != 0x02)
2161 {
2162 sendpacket[i + 1] = 0;
2163 }
2164 }
2165
2166 //Skip over the extended Node ID option
2167 if( sendpacket[i] == 0x04 )
2168 {
2169 i += 8;
2170 }
2171
2172 //We also want to turn off all header compression opt.
2173 for(; sendpacket[i] == 0x80 ;)
2174 {
2175 sendpacket[i + 1] = 0;
2176 i += (sendpacket[i + 2] << 8) + (sendpacket[i + 3]) + 4;
2177 }
2178
2179 //Set the packet type to timer response
2180 sendpacket[34] = 0x01;
2181
2182 printk(KERN_INFO "%s: Sending IPXWAN Timer Response\n",devname);
2183 }
2184 else if( sendpacket[34] == 0x02 )
2185 {
2186 //This is an information request packet
2187 printk(KERN_INFO "%s: Received IPXWAN Information Request packet\n",devname);
2188
2189 //Set the packet type to information response
2190 sendpacket[34] = 0x03;
2191
2192 //Set the router name
2193 sendpacket[51] = 'P';
2194 sendpacket[52] = 'T';
2195 sendpacket[53] = 'P';
2196 sendpacket[54] = 'I';
2197 sendpacket[55] = 'P';
2198 sendpacket[56] = 'E';
2199 sendpacket[57] = '-';
2200 sendpacket[58] = CVHexToAscii(network_number >> 28);
2201 sendpacket[59] = CVHexToAscii((network_number & 0x0F000000)>> 24);
2202 sendpacket[60] = CVHexToAscii((network_number & 0x00F00000)>> 20);
2203 sendpacket[61] = CVHexToAscii((network_number & 0x000F0000)>> 16);
2204 sendpacket[62] = CVHexToAscii((network_number & 0x0000F000)>> 12);
2205 sendpacket[63] = CVHexToAscii((network_number & 0x00000F00)>> 8);
2206 sendpacket[64] = CVHexToAscii((network_number & 0x000000F0)>> 4);
2207 sendpacket[65] = CVHexToAscii(network_number & 0x0000000F);
2208 for(i = 66; i < 99; i+= 1)
2209 {
2210 sendpacket[i] = 0;
2211 }
2212
2213 printk(KERN_INFO "%s: Sending IPXWAN Information Response packet\n",devname);
2214 }
2215 else
2216 {
2217 printk(KERN_INFO "%s: Unknown IPXWAN packet!\n",devname);
2218 return 0;
2219 }
2220
2221 //Set the WNodeID to our network address
2222 sendpacket[35] = (unsigned char)(network_number >> 24);
2223 sendpacket[36] = (unsigned char)((network_number & 0x00FF0000) >> 16);
2224 sendpacket[37] = (unsigned char)((network_number & 0x0000FF00) >> 8);
2225 sendpacket[38] = (unsigned char)(network_number & 0x000000FF);
2226
2227 return 1;
2228 } else {
2229 //If we get here's its an IPX-data packet, so it'll get passed up the stack.
2230
2231 //switch the network numbers
2232 switch_net_numbers(sendpacket, network_number, 1);
2233 return 0;
2234 }
2235 }
2236
2237 /****** Background Polling Routines ****************************************/
2238
2239 /* All polling functions are invoked by the TIMER interrupt in the wpp_isr
2240 * routine.
2241 */
2242
2243 /*============================================================================
2244 * Monitor active link phase.
2245 */
2246 static void process_route (sdla_t *card)
2247 {
2248 ppp_flags_t *flags = card->flags;
2249 netdevice_t *dev = card->wandev.dev;
2250 ppp_private_area_t *ppp_priv_area = dev->priv;
2251
2252 #if defined(LINUX_2_1) || defined(LINUX_2_4)
2253
2254 if ((card->u.p.ip_mode == WANOPT_PPP_PEER) &&
2255 (flags->ip_state == 0x09)){
2256
2257 /* We get ip_local from the firmware in PEER mode.
2258 * Therefore, if ip_local is 0, we failed to obtain
2259 * the remote IP address. */
2260 if (ppp_priv_area->ip_local == 0)
2261 return;
2262
2263 printk(KERN_INFO "%s: IPCP State Opened.\n", card->devname);
2264 if (read_info( card )) {
2265 printk(KERN_INFO
2266 "%s: An error occurred in IP assignment.\n",
2267 card->devname);
2268 } else {
2269 struct in_device *in_dev = dev->ip_ptr;
2270 if (in_dev != NULL ) {
2271 struct in_ifaddr *ifa = in_dev->ifa_list;
2272 printk(KERN_INFO "%s: Assigned Lcl. Addr: %s\n",
2273 card->devname, in_ntoa(ifa->ifa_local));
2274 printk(KERN_INFO "%s: Assigned Rmt. Addr: %s\n",
2275 card->devname, in_ntoa(ifa->ifa_address));
2276 }else{
2277 printk(KERN_INFO
2278 "%s: Error: Failed to add a route for PPP interface %s\n",
2279 card->devname,dev->name);
2280 }
2281 }
2282 }
2283 #else
2284
2285 if ((card->u.p.ip_mode == WANOPT_PPP_PEER) &&
2286 (flags->ip_state == 0x09)){
2287
2288 if (ppp_priv_area->ip_local == 0)
2289 return;
2290
2291 printk(KERN_INFO "%s: IPCP State Opened.\n", card->devname);
2292 if (read_info( card )) {
2293 printk(KERN_INFO
2294 "%s: An error occurred in IP assignment.\n",
2295 card->devname);
2296 } else {
2297 printk(KERN_INFO "%s: Assigned Lcl. Addr: %s\n",
2298 card->devname, in_ntoa(dev->pa_addr));
2299 printk(KERN_INFO "%s: Assigned Rmt. Addr: %s\n",
2300 card->devname, in_ntoa(dev->pa_dstaddr));
2301 }
2302 }
2303
2304 #endif
2305
2306 }
2307
2308 /*============================================================================
2309 * Monitor physical link disconnected phase.
2310 * o if interface is up and the hold-down timeout has expired, then retry
2311 * connection.
2312 */
2313 static void retrigger_comm(sdla_t *card)
2314 {
2315 netdevice_t *dev = card->wandev.dev;
2316
2317 if (dev && ((jiffies - card->state_tick) > HOLD_DOWN_TIME)) {
2318
2319 wanpipe_set_state(card, WAN_CONNECTING);
2320
2321 if(ppp_comm_enable(card) == CMD_OK){
2322 init_ppp_tx_rx_buff( card );
2323 }
2324 }
2325 }
2326
2327 /****** Miscellaneous Functions *********************************************/
2328
2329 /*============================================================================
2330 * Configure S508 adapter.
2331 */
2332 static int config508(netdevice_t *dev, sdla_t *card)
2333 {
2334 ppp508_conf_t cfg;
2335 #if defined(LINUX_2_1) || defined(LINUX_2_4)
2336 struct in_device *in_dev = dev->ip_ptr;
2337 #endif
2338 ppp_private_area_t *ppp_priv_area = dev->priv;
2339
2340 /* Prepare PPP configuration structure */
2341 memset(&cfg, 0, sizeof(ppp508_conf_t));
2342
2343 if (card->wandev.clocking)
2344 cfg.line_speed = card->wandev.bps;
2345
2346 if (card->wandev.interface == WANOPT_RS232)
2347 cfg.conf_flags |= INTERFACE_LEVEL_RS232;
2348
2349
2350 cfg.conf_flags |= DONT_TERMINATE_LNK_MAX_CONFIG; /*send Configure-Request packets forever*/
2351 cfg.txbuf_percent = PERCENT_TX_BUFF; /* % of Tx bufs */
2352 cfg.mtu_local = card->wandev.mtu;
2353 cfg.mtu_remote = card->wandev.mtu; /* Default */
2354 cfg.restart_tmr = TIME_BETWEEN_CONF_REQ; /* 30 = 3sec */
2355 cfg.auth_rsrt_tmr = TIME_BETWEEN_PAP_CHAP_REQ; /* 30 = 3sec */
2356 cfg.auth_wait_tmr = WAIT_PAP_CHAP_WITHOUT_REPLY; /* 300 = 30s */
2357 cfg.mdm_fail_tmr = WAIT_AFTER_DCD_CTS_LOW; /* 5 = 0.5s */
2358 cfg.dtr_drop_tmr = TIME_DCD_CTS_LOW_AFTER_LNK_DOWN; /* 10 = 1s */
2359 cfg.connect_tmout = WAIT_DCD_HIGH_AFTER_ENABLE_COMM; /* 900 = 90s */
2360 cfg.conf_retry = MAX_CONF_REQ_WITHOUT_REPLY; /* 10 = 1s */
2361 cfg.term_retry = MAX_TERM_REQ_WITHOUT_REPLY; /* 2 times */
2362 cfg.fail_retry = NUM_CONF_NAK_WITHOUT_REPLY; /* 5 times */
2363 cfg.auth_retry = NUM_AUTH_REQ_WITHOUT_REPLY; /* 10 times */
2364
2365
2366 if( !card->u.p.authenticator ) {
2367 printk(KERN_INFO "%s: Device is not configured as an authenticator\n",
2368 card->devname);
2369 cfg.auth_options = NO_AUTHENTICATION;
2370 }else{
2371 printk(KERN_INFO "%s: Device is configured as an authenticator\n",
2372 card->devname);
2373 cfg.auth_options = INBOUND_AUTH;
2374 }
2375
2376 if( ppp_priv_area->pap == WANOPT_YES){
2377 cfg.auth_options |=PAP_AUTH;
2378 printk(KERN_INFO "%s: Pap enabled\n", card->devname);
2379 }
2380 if( ppp_priv_area->chap == WANOPT_YES){
2381 cfg.auth_options |= CHAP_AUTH;
2382 printk(KERN_INFO "%s: Chap enabled\n", card->devname);
2383 }
2384
2385
2386 if (ppp_priv_area->enable_IPX == WANOPT_YES){
2387 printk(KERN_INFO "%s: Enabling IPX Protocol\n",card->devname);
2388 cfg.ipx_options = ENABLE_IPX | ROUTING_PROT_DEFAULT;
2389 }else{
2390 cfg.ipx_options = DISABLE_IPX;
2391 }
2392
2393 switch (card->u.p.ip_mode) {
2394
2395 case WANOPT_PPP_STATIC:
2396
2397 printk(KERN_INFO "%s: PPP IP Mode: STATIC\n",card->devname);
2398 cfg.ip_options = L_AND_R_IP_NO_ASSIG |
2399 ENABLE_IP;
2400 #if defined(LINUX_2_1) || defined(LINUX_2_4)
2401 cfg.ip_local = in_dev->ifa_list->ifa_local;
2402 cfg.ip_remote = in_dev->ifa_list->ifa_address;
2403 #else
2404 cfg.ip_local = dev->pa_addr;
2405 cfg.ip_remote = dev->pa_dstaddr;
2406 #endif
2407
2408 /* Debugging code used to check that IP addresses
2409 * obtained from the kernel are correct */
2410
2411 {
2412 char laddr[20];
2413 char raddr[20];
2414 strcpy(laddr,in_ntoa(cfg.ip_local));
2415 strcpy(raddr,in_ntoa(cfg.ip_remote));
2416
2417 NEX_PRINTK(KERN_INFO "Local %s Remote %s Name %s\n",
2418 laddr,raddr, dev->name);
2419
2420 }
2421 break;
2422
2423 case WANOPT_PPP_HOST:
2424
2425 printk(KERN_INFO "%s: PPP IP Mode: HOST\n",card->devname);
2426 cfg.ip_options = L_IP_LOCAL_ASSIG |
2427 R_IP_LOCAL_ASSIG |
2428 ENABLE_IP;
2429 #if defined(LINUX_2_1) || defined(LINUX_2_4)
2430 cfg.ip_local = in_dev->ifa_list->ifa_local;
2431 cfg.ip_remote = in_dev->ifa_list->ifa_address;
2432 #else
2433 cfg.ip_local = dev->pa_addr;
2434 cfg.ip_remote = dev->pa_dstaddr;
2435 #endif
2436
2437 /* Debugging code used to check that IP addresses
2438 * obtained from the kernel are correct */
2439 {
2440 char laddr[20];
2441 char raddr[20];
2442 strcpy(laddr,in_ntoa(cfg.ip_local));
2443 strcpy(raddr,in_ntoa(cfg.ip_remote));
2444
2445 NEX_PRINTK (KERN_INFO "Local %s Remote %s Name %s\n",
2446 laddr,raddr, dev->name);
2447
2448 }
2449
2450
2451 break;
2452
2453 case WANOPT_PPP_PEER:
2454
2455 #if defined(LINUX_2_1) || defined(LINUX_2_4)
2456
2457 printk(KERN_INFO "%s: PPP IP Mode: PEER\n",card->devname);
2458 cfg.ip_options = L_IP_REMOTE_ASSIG |
2459 R_IP_REMOTE_ASSIG |
2460 ENABLE_IP;
2461 cfg.ip_local = 0x00;
2462 cfg.ip_remote = 0x00;
2463 break;
2464
2465 #else
2466
2467 /* No PEER support for 2.0.X kernels, drop down to default
2468 * condition */
2469
2470 printk(KERN_INFO "%s: ERROR, PEER mode is not supported in 2.0.X kernels\n",
2471 card->devname);
2472
2473 #endif
2474
2475 default:
2476 printk(KERN_INFO "%s: ERROR: Unsuported PPP Mode Selected\n",
2477 card->devname);
2478 printk(KERN_INFO "%s: PPP IP Modes: STATIC, PEER or HOST\n",
2479 card->devname);
2480 return 1;
2481 }
2482
2483 return ppp_configure(card, &cfg);
2484 }
2485
2486 /*============================================================================
2487 * Show disconnection cause.
2488 */
2489 static void show_disc_cause(sdla_t *card, unsigned cause)
2490 {
2491 if (cause & 0x0802)
2492
2493 printk(KERN_INFO "%s: link terminated by peer\n",
2494 card->devname);
2495
2496 else if (cause & 0x0004)
2497
2498 printk(KERN_INFO "%s: link terminated by user\n",
2499 card->devname);
2500
2501 else if (cause & 0x0008)
2502
2503 printk(KERN_INFO "%s: authentication failed\n", card->devname);
2504
2505 else if (cause & 0x0010)
2506
2507 printk(KERN_INFO
2508 "%s: authentication protocol negotiation failed\n",
2509 card->devname);
2510
2511 else if (cause & 0x0020)
2512
2513 printk(KERN_INFO
2514 "%s: peer's request for authentication rejected\n",
2515 card->devname);
2516
2517 else if (cause & 0x0040)
2518
2519 printk(KERN_INFO "%s: MRU option rejected by peer\n",
2520 card->devname);
2521
2522 else if (cause & 0x0080)
2523
2524 printk(KERN_INFO "%s: peer's MRU was too small\n",
2525 card->devname);
2526
2527 else if (cause & 0x0100)
2528
2529 printk(KERN_INFO "%s: failed to negotiate peer's LCP options\n",
2530 card->devname);
2531
2532 else if (cause & 0x0200)
2533
2534 printk(KERN_INFO "%s: failed to negotiate peer's IPCP options\n"
2535 , card->devname);
2536
2537 else if (cause & 0x0400)
2538
2539 printk(KERN_INFO
2540 "%s: failed to negotiate peer's IPXCP options\n",
2541 card->devname);
2542 }
2543
2544 /*=============================================================================
2545 * Process UDP call of type PTPIPEAB.
2546 */
2547 static void process_udp_mgmt_pkt(sdla_t *card, netdevice_t *dev,
2548 ppp_private_area_t *ppp_priv_area )
2549 {
2550 unsigned char buf2[5];
2551 unsigned char *buf;
2552 unsigned int frames, len;
2553 struct sk_buff *new_skb;
2554 unsigned short data_length, buffer_length, real_len;
2555 unsigned long data_ptr;
2556 int udp_mgmt_req_valid = 1;
2557 ppp_mbox_t *mbox = card->mbox;
2558 struct timeval tv;
2559 int err;
2560 ppp_udp_pkt_t *ppp_udp_pkt = (ppp_udp_pkt_t*)&ppp_priv_area->udp_pkt_data;
2561
2562 memcpy(&buf2, &card->wandev.udp_port, 2 );
2563
2564
2565 if(ppp_priv_area->udp_pkt_src == UDP_PKT_FRM_NETWORK) {
2566
2567 switch(ppp_udp_pkt->cblock.command) {
2568
2569 case PPIPE_GET_IBA_DATA:
2570 case PPP_READ_CONFIG:
2571 case PPP_GET_CONNECTION_INFO:
2572 case PPIPE_ROUTER_UP_TIME:
2573 case PPP_READ_STATISTICS:
2574 case PPP_READ_ERROR_STATS:
2575 case PPP_READ_PACKET_STATS:
2576 case PPP_READ_LCP_STATS:
2577 case PPP_READ_IPCP_STATS:
2578 case PPP_READ_IPXCP_STATS:
2579 case PPP_READ_PAP_STATS:
2580 case PPP_READ_CHAP_STATS:
2581 case PPP_READ_CODE_VERSION:
2582 udp_mgmt_req_valid = 1;
2583 break;
2584
2585 default:
2586 udp_mgmt_req_valid = 0;
2587 break;
2588 }
2589 }
2590
2591 if(!udp_mgmt_req_valid) {
2592
2593 /* set length to 0 */
2594 ppp_udp_pkt->cblock.length = 0x00;
2595
2596 /* set return code */
2597 ppp_udp_pkt->cblock.result = 0xCD;
2598 ++ppp_priv_area->pipe_mgmt_stat.UDP_PIPE_mgmt_direction_err;
2599
2600 if (net_ratelimit()){
2601 printk(KERN_INFO
2602 "%s: Warning, Illegal UDP command attempted from network: %x\n",
2603 card->devname,ppp_udp_pkt->cblock.command);
2604 }
2605 } else {
2606 /* Initialize the trace element */
2607 trace_element_t trace_element;
2608
2609 switch (ppp_udp_pkt->cblock.command){
2610
2611 /* PPIPE_ENABLE_TRACING */
2612 case PPIPE_ENABLE_TRACING:
2613 if (!card->TracingEnabled) {
2614
2615 /* OPERATE_DATALINE_MONITOR */
2616 mbox->cmd.command = PPP_DATALINE_MONITOR;
2617 mbox->cmd.length = 0x01;
2618 mbox->data[0] = ppp_udp_pkt->data[0];
2619 err = sdla_exec(mbox) ?
2620 mbox->cmd.result : CMD_TIMEOUT;
2621
2622 if (err != CMD_OK) {
2623
2624 ppp_error(card, err, mbox);
2625 card->TracingEnabled = 0;
2626
2627 /* set the return code */
2628
2629 ppp_udp_pkt->cblock.result = mbox->cmd.result;
2630 mbox->cmd.length = 0;
2631 break;
2632 }
2633
2634 sdla_peek(&card->hw, 0xC000, &buf2, 2);
2635
2636 ppp_priv_area->curr_trace_addr = 0;
2637 memcpy(&ppp_priv_area->curr_trace_addr, &buf2, 2);
2638 ppp_priv_area->start_trace_addr =
2639 ppp_priv_area->curr_trace_addr;
2640 ppp_priv_area->end_trace_addr =
2641 ppp_priv_area->start_trace_addr + END_OFFSET;
2642
2643 /* MAX_SEND_BUFFER_SIZE - 28 (IP header)
2644 - 32 (ppipemon CBLOCK) */
2645 available_buffer_space = MAX_LGTH_UDP_MGNT_PKT -
2646 sizeof(ip_pkt_t)-
2647 sizeof(udp_pkt_t)-
2648 sizeof(wp_mgmt_t)-
2649 sizeof(cblock_t);
2650 }
2651 ppp_udp_pkt->cblock.result = 0;
2652 mbox->cmd.length = 0;
2653 card->TracingEnabled = 1;
2654 break;
2655
2656 /* PPIPE_DISABLE_TRACING */
2657 case PPIPE_DISABLE_TRACING:
2658
2659 if(card->TracingEnabled) {
2660
2661 /* OPERATE_DATALINE_MONITOR */
2662 mbox->cmd.command = 0x33;
2663 mbox->cmd.length = 1;
2664 mbox->data[0] = 0x00;
2665 err = sdla_exec(mbox) ?
2666 mbox->cmd.result : CMD_TIMEOUT;
2667
2668 }
2669
2670 /*set return code*/
2671 ppp_udp_pkt->cblock.result = 0;
2672 mbox->cmd.length = 0;
2673 card->TracingEnabled = 0;
2674 break;
2675
2676 /* PPIPE_GET_TRACE_INFO */
2677 case PPIPE_GET_TRACE_INFO:
2678
2679 if(!card->TracingEnabled) {
2680 /* set return code */
2681 ppp_udp_pkt->cblock.result = 1;
2682 mbox->cmd.length = 0;
2683 }
2684
2685 buffer_length = 0;
2686
2687 /* frames < 62, where 62 is the number of trace
2688 information elements. There is in total 496
2689 bytes of space and each trace information
2690 element is 8 bytes.
2691 */
2692 for ( frames=0; frames<62; frames++) {
2693
2694 trace_pkt_t *trace_pkt = (trace_pkt_t *)
2695 &ppp_udp_pkt->data[buffer_length];
2696
2697 /* Read the whole trace packet */
2698 sdla_peek(&card->hw, ppp_priv_area->curr_trace_addr,
2699 &trace_element, sizeof(trace_element_t));
2700
2701 /* no data on board so exit */
2702 if( trace_element.opp_flag == 0x00 )
2703 break;
2704
2705 data_ptr = trace_element.trace_data_ptr;
2706
2707 /* See if there is actual data on the trace buffer */
2708 if (data_ptr){
2709 data_length = trace_element.trace_length;
2710 }else{
2711 data_length = 0;
2712 ppp_udp_pkt->data[0] |= 0x02;
2713 }
2714
2715 //FIXME: Do we need this check
2716 if ((available_buffer_space - buffer_length)
2717 < (sizeof(trace_element_t)+1)){
2718
2719 /*indicate we have more frames
2720 * on board and exit
2721 */
2722 ppp_udp_pkt->data[0] |= 0x02;
2723 break;
2724 }
2725
2726 trace_pkt->status = trace_element.trace_type;
2727 trace_pkt->time_stamp = trace_element.trace_time_stamp;
2728 trace_pkt->real_length = trace_element.trace_length;
2729
2730 real_len = trace_element.trace_length;
2731
2732 if(data_ptr == 0){
2733 trace_pkt->data_avail = 0x00;
2734 }else{
2735 /* we can take it next time */
2736 if ((available_buffer_space - buffer_length)<
2737 (real_len + sizeof(trace_pkt_t))){
2738
2739 ppp_udp_pkt->data[0] |= 0x02;
2740 break;
2741 }
2742 trace_pkt->data_avail = 0x01;
2743
2744 /* get the data */
2745 sdla_peek(&card->hw, data_ptr,
2746 &trace_pkt->data,
2747 real_len);
2748 }
2749 /* zero the opp flag to
2750 show we got the frame */
2751 buf2[0] = 0x00;
2752 sdla_poke(&card->hw, ppp_priv_area->curr_trace_addr,
2753 &buf2, 1);
2754
2755 /* now move onto the next
2756 frame */
2757 ppp_priv_area->curr_trace_addr += 8;
2758
2759 /* check if we passed the last address */
2760 if ( ppp_priv_area->curr_trace_addr >=
2761 ppp_priv_area->end_trace_addr){
2762
2763 ppp_priv_area->curr_trace_addr =
2764 ppp_priv_area->start_trace_addr;
2765 }
2766
2767 /* update buffer length and make sure its even */
2768
2769 if ( trace_pkt->data_avail == 0x01 ) {
2770 buffer_length += real_len - 1;
2771 }
2772
2773 /* for the header */
2774 buffer_length += 8;
2775
2776 if( buffer_length & 0x0001 )
2777 buffer_length += 1;
2778 }
2779
2780 /* ok now set the total number of frames passed
2781 in the high 5 bits */
2782 ppp_udp_pkt->data[0] |= (frames << 2);
2783
2784 /* set the data length */
2785 mbox->cmd.length = buffer_length;
2786 ppp_udp_pkt->cblock.length = buffer_length;
2787
2788 /* set return code */
2789 ppp_udp_pkt->cblock.result = 0;
2790 break;
2791
2792 /* PPIPE_GET_IBA_DATA */
2793 case PPIPE_GET_IBA_DATA:
2794
2795 mbox->cmd.length = 0x09;
2796
2797 sdla_peek(&card->hw, 0xF003, &ppp_udp_pkt->data,
2798 mbox->cmd.length);
2799
2800 /* set the length of the data */
2801 ppp_udp_pkt->cblock.length = 0x09;
2802
2803 /* set return code */
2804 ppp_udp_pkt->cblock.result = 0x00;
2805 ppp_udp_pkt->cblock.result = 0;
2806 break;
2807
2808 /* PPIPE_FT1_READ_STATUS */
2809 case PPIPE_FT1_READ_STATUS:
2810 sdla_peek(&card->hw, 0xF020, &ppp_udp_pkt->data[0], 2);
2811 ppp_udp_pkt->cblock.length = mbox->cmd.length = 2;
2812 ppp_udp_pkt->cblock.result = 0;
2813 break;
2814
2815 case PPIPE_FLUSH_DRIVER_STATS:
2816 init_ppp_priv_struct( ppp_priv_area );
2817 init_global_statistics( card );
2818 mbox->cmd.length = 0;
2819 ppp_udp_pkt->cblock.result = 0;
2820 break;
2821
2822
2823 case PPIPE_ROUTER_UP_TIME:
2824
2825 do_gettimeofday( &tv );
2826 ppp_priv_area->router_up_time = tv.tv_sec -
2827 ppp_priv_area->router_start_time;
2828 *(unsigned long *)&ppp_udp_pkt->data = ppp_priv_area->router_up_time;
2829 mbox->cmd.length = 4;
2830 ppp_udp_pkt->cblock.result = 0;
2831 break;
2832
2833 /* PPIPE_DRIVER_STATISTICS */
2834 case PPIPE_DRIVER_STAT_IFSEND:
2835 memcpy(&ppp_udp_pkt->data, &ppp_priv_area->if_send_stat,
2836 sizeof(if_send_stat_t));
2837
2838
2839 ppp_udp_pkt->cblock.result = 0;
2840 ppp_udp_pkt->cblock.length = sizeof(if_send_stat_t);
2841 mbox->cmd.length = sizeof(if_send_stat_t);
2842 break;
2843
2844 case PPIPE_DRIVER_STAT_INTR:
2845 memcpy(&ppp_udp_pkt->data, &card->statistics,
2846 sizeof(global_stats_t));
2847
2848 memcpy(&ppp_udp_pkt->data+sizeof(global_stats_t),
2849 &ppp_priv_area->rx_intr_stat,
2850 sizeof(rx_intr_stat_t));
2851
2852 ppp_udp_pkt->cblock.result = 0;
2853 ppp_udp_pkt->cblock.length = sizeof(global_stats_t)+
2854 sizeof(rx_intr_stat_t);
2855 mbox->cmd.length = ppp_udp_pkt->cblock.length;
2856 break;
2857
2858 case PPIPE_DRIVER_STAT_GEN:
2859 memcpy( &ppp_udp_pkt->data,
2860 &ppp_priv_area->pipe_mgmt_stat,
2861 sizeof(pipe_mgmt_stat_t));
2862
2863 memcpy(&ppp_udp_pkt->data+sizeof(pipe_mgmt_stat_t),
2864 &card->statistics, sizeof(global_stats_t));
2865
2866 ppp_udp_pkt->cblock.result = 0;
2867 ppp_udp_pkt->cblock.length = sizeof(global_stats_t)+
2868 sizeof(rx_intr_stat_t);
2869 mbox->cmd.length = ppp_udp_pkt->cblock.length;
2870 break;
2871
2872
2873 /* FT1 MONITOR STATUS */
2874 case FT1_MONITOR_STATUS_CTRL:
2875
2876 /* Enable FT1 MONITOR STATUS */
2877 if( ppp_udp_pkt->data[0] == 1) {
2878
2879 if( rCount++ != 0 ) {
2880 ppp_udp_pkt->cblock.result = 0;
2881 mbox->cmd.length = 1;
2882 break;
2883 }
2884 }
2885
2886 /* Disable FT1 MONITOR STATUS */
2887 if( ppp_udp_pkt->data[0] == 0) {
2888
2889 if( --rCount != 0) {
2890 ppp_udp_pkt->cblock.result = 0;
2891 mbox->cmd.length = 1;
2892 break;
2893 }
2894 }
2895 goto udp_dflt_cmd;
2896
2897 /* WARNING: FIXME: This should be fixed.
2898 * The FT1 Status Ctrl doesn't have a break
2899 * statment. Thus, no code must be inserted
2900 * HERE: between default and above case statement */
2901
2902 default:
2903 udp_dflt_cmd:
2904
2905 /* it's a board command */
2906 mbox->cmd.command = ppp_udp_pkt->cblock.command;
2907 mbox->cmd.length = ppp_udp_pkt->cblock.length;
2908
2909 if(mbox->cmd.length) {
2910 memcpy(&mbox->data,(unsigned char *)ppp_udp_pkt->data,
2911 mbox->cmd.length);
2912 }
2913
2914 /* run the command on the board */
2915 err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT;
2916
2917 if (err != CMD_OK) {
2918
2919 ppp_error(card, err, mbox);
2920 ++ppp_priv_area->pipe_mgmt_stat.
2921 UDP_PIPE_mgmt_adptr_cmnd_timeout;
2922 break;
2923 }
2924
2925 ++ppp_priv_area->pipe_mgmt_stat.UDP_PIPE_mgmt_adptr_cmnd_OK;
2926
2927 /* copy the result back to our buffer */
2928 memcpy(&ppp_udp_pkt->cblock,mbox, sizeof(cblock_t));
2929
2930 if(mbox->cmd.length) {
2931 memcpy(&ppp_udp_pkt->data,&mbox->data,mbox->cmd.length);
2932 }
2933
2934 } /* end of switch */
2935 } /* end of else */
2936
2937 /* Fill UDP TTL */
2938 ppp_udp_pkt->ip_pkt.ttl = card->wandev.ttl;
2939 len = reply_udp(ppp_priv_area->udp_pkt_data, mbox->cmd.length);
2940
2941 if (ppp_priv_area->udp_pkt_src == UDP_PKT_FRM_NETWORK) {
2942
2943 /* Make sure we are not already sending */
2944 if (!test_bit(SEND_CRIT,&card->wandev.critical)){
2945 ++ppp_priv_area->pipe_mgmt_stat.UDP_PIPE_mgmt_passed_to_adptr;
2946 ppp_send(card,ppp_priv_area->udp_pkt_data,len,ppp_priv_area->protocol);
2947 }
2948
2949 } else {
2950
2951 /* Pass it up the stack
2952 Allocate socket buffer */
2953 if ((new_skb = dev_alloc_skb(len)) != NULL) {
2954
2955 /* copy data into new_skb */
2956
2957 buf = skb_put(new_skb, len);
2958 memcpy(buf,ppp_priv_area->udp_pkt_data, len);
2959
2960 ++ppp_priv_area->pipe_mgmt_stat.UDP_PIPE_mgmt_passed_to_stack;
2961
2962 /* Decapsulate packet and pass it up the protocol
2963 stack */
2964 new_skb->protocol = htons(ETH_P_IP);
2965 new_skb->dev = dev;
2966 new_skb->mac.raw = new_skb->data;
2967 netif_rx(new_skb);
2968
2969 } else {
2970
2971 ++ppp_priv_area->pipe_mgmt_stat.UDP_PIPE_mgmt_no_socket;
2972 printk(KERN_INFO "no socket buffers available!\n");
2973 }
2974 }
2975
2976 ppp_priv_area->udp_pkt_lgth = 0;
2977
2978 return;
2979 }
2980
2981 /*=============================================================================
2982 * Initial the ppp_private_area structure.
2983 */
2984 static void init_ppp_priv_struct( ppp_private_area_t *ppp_priv_area )
2985 {
2986
2987 memset(&ppp_priv_area->if_send_stat, 0, sizeof(if_send_stat_t));
2988 memset(&ppp_priv_area->rx_intr_stat, 0, sizeof(rx_intr_stat_t));
2989 memset(&ppp_priv_area->pipe_mgmt_stat, 0, sizeof(pipe_mgmt_stat_t));
2990 }
2991
2992 /*============================================================================
2993 * Initialize Global Statistics
2994 */
2995 static void init_global_statistics( sdla_t *card )
2996 {
2997 memset(&card->statistics, 0, sizeof(global_stats_t));
2998 }
2999
3000 /*============================================================================
3001 * Initialize Receive and Transmit Buffers.
3002 */
3003 static void init_ppp_tx_rx_buff( sdla_t *card )
3004 {
3005 ppp508_buf_info_t* info;
3006
3007 if (card->hw.type == SDLA_S514) {
3008
3009 info = (void*)(card->hw.dpmbase + PPP514_BUF_OFFS);
3010
3011 card->u.p.txbuf_base = (void*)(card->hw.dpmbase +
3012 info->txb_ptr);
3013
3014 card->u.p.txbuf_last = (ppp_buf_ctl_t*)card->u.p.txbuf_base +
3015 (info->txb_num - 1);
3016
3017 card->u.p.rxbuf_base = (void*)(card->hw.dpmbase +
3018 info->rxb_ptr);
3019
3020 card->u.p.rxbuf_last = (ppp_buf_ctl_t*)card->u.p.rxbuf_base +
3021 (info->rxb_num - 1);
3022
3023 } else {
3024
3025 info = (void*)(card->hw.dpmbase + PPP508_BUF_OFFS);
3026
3027 card->u.p.txbuf_base = (void*)(card->hw.dpmbase +
3028 (info->txb_ptr - PPP508_MB_VECT));
3029
3030 card->u.p.txbuf_last = (ppp_buf_ctl_t*)card->u.p.txbuf_base +
3031 (info->txb_num - 1);
3032
3033 card->u.p.rxbuf_base = (void*)(card->hw.dpmbase +
3034 (info->rxb_ptr - PPP508_MB_VECT));
3035
3036 card->u.p.rxbuf_last = (ppp_buf_ctl_t*)card->u.p.rxbuf_base +
3037 (info->rxb_num - 1);
3038 }
3039
3040 card->u.p.txbuf_next = (unsigned long*)&info->txb_nxt;
3041 card->u.p.rxbuf_next = (unsigned long*)&info->rxb1_ptr;
3042
3043 card->u.p.rx_base = info->rxb_base;
3044 card->u.p.rx_top = info->rxb_end;
3045
3046 card->u.p.txbuf = card->u.p.txbuf_base;
3047 card->rxmb = card->u.p.rxbuf_base;
3048
3049 }
3050
3051 /*=============================================================================
3052 * Read Connection Information (ie for Remote IP address assginment).
3053 * Called when ppp interface connected.
3054 */
3055 static int read_info( sdla_t *card )
3056 {
3057 netdevice_t *dev = card->wandev.dev;
3058 ppp_private_area_t *ppp_priv_area = dev->priv;
3059 int err;
3060
3061 #if defined(LINUX_2_1) || defined(LINUX_2_4)
3062 struct ifreq if_info;
3063 struct sockaddr_in *if_data1, *if_data2;
3064 mm_segment_t fs;
3065 #else
3066 #ifdef _DYNAMIC_ROUTE_20X_SUPPORT_
3067 struct rtentry route;
3068 #endif
3069 #endif
3070
3071
3072
3073 #if defined(LINUX_2_1) || defined(LINUX_2_4)
3074
3075 /* Set Local and remote addresses */
3076 memset(&if_info, 0, sizeof(if_info));
3077 strcpy(if_info.ifr_name, dev->name);
3078
3079
3080 fs = get_fs();
3081 set_fs(get_ds()); /* get user space block */
3082
3083 /* Change the local and remote ip address of the interface.
3084 * This will also add in the destination route.
3085 */
3086 if_data1 = (struct sockaddr_in *)&if_info.ifr_addr;
3087 if_data1->sin_addr.s_addr = ppp_priv_area->ip_local;
3088 if_data1->sin_family = AF_INET;
3089 err = devinet_ioctl( SIOCSIFADDR, &if_info );
3090 if_data2 = (struct sockaddr_in *)&if_info.ifr_dstaddr;
3091 if_data2->sin_addr.s_addr = ppp_priv_area->ip_remote;
3092 if_data2->sin_family = AF_INET;
3093 err = devinet_ioctl( SIOCSIFDSTADDR, &if_info );
3094
3095 set_fs(fs); /* restore old block */
3096
3097 #else
3098 /* FIXME: Dynamic Routing in 2.0.X kernels is not
3099 * supported. Sorry ! I'll come back to it when I get
3100 * a chance. */
3101
3102 printk(KERN_INFO "%s: ERROR, Dynamic routing is not supported in 2.0.X kernels\n",
3103 card->devname);
3104 printk(KERN_INFO "%s: Please use the STATIC IP mode!\n",
3105 card->devname);
3106
3107 err = 0;
3108
3109 #ifdef _DYNAMIC_ROUTE_20X_SUPPORT_
3110 dev->pa_dstaddr = ppp_priv_area->ip_remote;
3111 dev->pa_addr = ppp_priv_area->ip_local;
3112
3113 memset(&route, 0, sizeof(route));
3114 route.rt_dev = dev->name;
3115 route.rt_flags = 0;
3116 ((struct sockaddr_in *)&(route.rt_dst))->sin_addr.s_addr =
3117 dev->pa_dstaddr;
3118 ((struct sockaddr_in *)&(route.rt_dst))->sin_family = AF_INET;
3119 ((struct sockaddr_in *)&(route.rt_genmask))->sin_addr.s_addr =
3120 0xFFFFFFFF;
3121 ((struct sockaddr_in *)&(route.rt_genmask))->sin_family =
3122 AF_INET;
3123
3124 err = ip_rt_new(&route);
3125
3126 #endif
3127
3128 #endif
3129
3130 if (err) {
3131 printk (KERN_INFO "%s: Adding of route failed: %i\n",
3132 card->devname,err);
3133 printk (KERN_INFO "%s: Local : %s\n",
3134 card->devname,in_ntoa(ppp_priv_area->ip_local));
3135 printk (KERN_INFO "%s: Remote: %s\n",
3136 card->devname,in_ntoa(ppp_priv_area->ip_remote));
3137 }
3138 return err;
3139 }
3140
3141 /*=============================================================================
3142 * Remove Dynamic Route.
3143 * Called when ppp interface disconnected.
3144 */
3145
3146 static void remove_route( sdla_t *card )
3147 {
3148
3149 netdevice_t *dev = card->wandev.dev;
3150 long ip_addr;
3151 int err;
3152
3153 #if defined(LINUX_2_1) || defined(LINUX_2_4)
3154 mm_segment_t fs;
3155 struct ifreq if_info;
3156 struct sockaddr_in *if_data1;
3157 struct in_device *in_dev = dev->ip_ptr;
3158 struct in_ifaddr *ifa = in_dev->ifa_list;
3159 #else
3160 unsigned long fs = 0;
3161 struct rtentry route;
3162 #endif
3163
3164
3165 #if defined(LINUX_2_1) || defined(LINUX_2_4)
3166 ip_addr = ifa->ifa_local;
3167
3168 /* Set Local and remote addresses */
3169 memset(&if_info, 0, sizeof(if_info));
3170 strcpy(if_info.ifr_name, dev->name);
3171 #endif
3172
3173
3174 fs = get_fs();
3175 set_fs(get_ds()); /* get user space block */
3176
3177
3178 #if defined(LINUX_2_1) || defined(LINUX_2_4)
3179 /* Change the local ip address of the interface to 0.
3180 * This will also delete the destination route.
3181 */
3182 if_data1 = (struct sockaddr_in *)&if_info.ifr_addr;
3183 if_data1->sin_addr.s_addr = 0;
3184 if_data1->sin_family = AF_INET;
3185 err = devinet_ioctl( SIOCSIFADDR, &if_info );
3186 #else
3187
3188 ip_addr = dev->pa_addr;
3189 dev->pa_dstaddr = 0;
3190
3191 memset(&route, 0, sizeof(route));
3192 route.rt_dev = dev->name;
3193 route.rt_flags = 0;
3194 ((struct sockaddr_in *)&(route.rt_dst))->sin_addr.s_addr =
3195 dev->pa_dstaddr;
3196 ((struct sockaddr_in *)&(route.rt_dst))->sin_family = AF_INET;
3197 ((struct sockaddr_in *)&(route.rt_genmask))->sin_addr.s_addr =
3198 0xFFFFFFFF;
3199 ((struct sockaddr_in *)&(route.rt_genmask))->sin_family =
3200 AF_INET;
3201
3202
3203 err = ip_rt_kill(&route);
3204
3205 #endif
3206
3207 set_fs(fs); /* restore old block */
3208
3209
3210 if (err) {
3211 printk (KERN_INFO "%s: Deleting dynamic route failed %d!\n",
3212 card->devname, err);
3213 return;
3214 }else{
3215 printk (KERN_INFO "%s: PPP Deleting dynamic route %s successfuly\n",
3216 card->devname, in_ntoa(ip_addr));
3217 }
3218 return;
3219 }
3220
3221 /*=============================================================================
3222 * Perform the Interrupt Test by running the READ_CODE_VERSION command MAX_INTR
3223 * _TEST_COUNTER times.
3224 */
3225 static int intr_test( sdla_t *card )
3226 {
3227 ppp_mbox_t *mb = card->mbox;
3228 int err,i;
3229
3230 err = ppp_set_intr_mode( card, 0x08 );
3231
3232 if (err == CMD_OK) {
3233
3234 for (i = 0; i < MAX_INTR_TEST_COUNTER; i ++) {
3235 /* Run command READ_CODE_VERSION */
3236 memset(&mb->cmd, 0, sizeof(ppp_cmd_t));
3237 mb->cmd.length = 0;
3238 mb->cmd.command = PPP_READ_CODE_VERSION;
3239 err = sdla_exec(mb) ? mb->cmd.result : CMD_TIMEOUT;
3240 if (err != CMD_OK)
3241 ppp_error(card, err, mb);
3242 }
3243 }
3244 else return err;
3245
3246 err = ppp_set_intr_mode( card, 0 );
3247 if (err != CMD_OK)
3248 return err;
3249
3250 return 0;
3251 }
3252
3253 /*==============================================================================
3254 * Determine what type of UDP call it is. DRVSTATS or PTPIPEAB ?
3255 */
3256 static int udp_pkt_type( struct sk_buff *skb, sdla_t *card )
3257 {
3258 unsigned char *sendpacket;
3259 unsigned char buf2[5];
3260 ppp_udp_pkt_t *ppp_udp_pkt = (ppp_udp_pkt_t *)skb->data;
3261
3262 sendpacket = skb->data;
3263 memcpy(&buf2, &card->wandev.udp_port, 2);
3264
3265 if( ppp_udp_pkt->ip_pkt.ver_inet_hdr_length == 0x45 && /* IP packet */
3266 sendpacket[9] == 0x11 && /* UDP packet */
3267 sendpacket[22] == buf2[1] && /* UDP Port */
3268 sendpacket[23] == buf2[0] &&
3269 sendpacket[36] == 0x01 ) {
3270
3271 if ( sendpacket[28] == 0x50 && /* PTPIPEAB: Signature */
3272 sendpacket[29] == 0x54 &&
3273 sendpacket[30] == 0x50 &&
3274 sendpacket[31] == 0x49 &&
3275 sendpacket[32] == 0x50 &&
3276 sendpacket[33] == 0x45 &&
3277 sendpacket[34] == 0x41 &&
3278 sendpacket[35] == 0x42 ){
3279
3280 return UDP_PTPIPE_TYPE;
3281
3282 } else if(sendpacket[28] == 0x44 && /* DRVSTATS: Signature */
3283 sendpacket[29] == 0x52 &&
3284 sendpacket[30] == 0x56 &&
3285 sendpacket[31] == 0x53 &&
3286 sendpacket[32] == 0x54 &&
3287 sendpacket[33] == 0x41 &&
3288 sendpacket[34] == 0x54 &&
3289 sendpacket[35] == 0x53 ){
3290
3291 return UDP_DRVSTATS_TYPE;
3292
3293 } else
3294 return UDP_INVALID_TYPE;
3295
3296 } else
3297 return UDP_INVALID_TYPE;
3298
3299 }
3300
3301 /*============================================================================
3302 * Check to see if the packet to be transmitted contains a broadcast or
3303 * multicast source IP address.
3304 */
3305
3306 static int chk_bcast_mcast_addr(sdla_t *card, netdevice_t* dev,
3307 struct sk_buff *skb)
3308 {
3309 u32 src_ip_addr;
3310 u32 broadcast_ip_addr = 0;
3311 #if defined(LINUX_2_1) || defined(LINUX_2_4)
3312 struct in_device *in_dev;
3313 #endif
3314 /* read the IP source address from the outgoing packet */
3315 src_ip_addr = *(u32 *)(skb->data + 12);
3316
3317 /* read the IP broadcast address for the device */
3318 #if defined(LINUX_2_1) || defined(LINUX_2_4)
3319 in_dev = dev->ip_ptr;
3320 if(in_dev != NULL) {
3321 struct in_ifaddr *ifa= in_dev->ifa_list;
3322 if(ifa != NULL)
3323 broadcast_ip_addr = ifa->ifa_broadcast;
3324 else
3325 return 0;
3326 }
3327 #else
3328 broadcast_ip_addr = dev->pa_brdaddr;
3329 #endif
3330
3331 /* check if the IP Source Address is a Broadcast address */
3332 if((dev->flags & IFF_BROADCAST) && (src_ip_addr == broadcast_ip_addr)) {
3333 printk(KERN_INFO "%s: Broadcast Source Address silently discarded\n",
3334 card->devname);
3335 return 1;
3336 }
3337
3338 /* check if the IP Source Address is a Multicast address */
3339 if((ntohl(src_ip_addr) >= 0xE0000001) &&
3340 (ntohl(src_ip_addr) <= 0xFFFFFFFE)) {
3341 printk(KERN_INFO "%s: Multicast Source Address silently discarded\n",
3342 card->devname);
3343 return 1;
3344 }
3345
3346 return 0;
3347 }
3348
3349 void s508_lock (sdla_t *card, unsigned long *smp_flags)
3350 {
3351 #if defined(__SMP__) || defined(LINUX_2_4)
3352 spin_lock_irqsave(&card->wandev.lock, *smp_flags);
3353 #else
3354 disable_irq(card->hw.irq);
3355 #endif
3356 }
3357
3358 void s508_unlock (sdla_t *card, unsigned long *smp_flags)
3359 {
3360 #if defined(__SMP__) || defined(LINUX_2_4)
3361 spin_unlock_irqrestore(&card->wandev.lock, *smp_flags);
3362 #else
3363 enable_irq(card->hw.irq);
3364 #endif
3365 }
3366
3367 static int read_connection_info (sdla_t *card)
3368 {
3369 ppp_mbox_t *mb = card->mbox;
3370 netdevice_t *dev = card->wandev.dev;
3371 ppp_private_area_t *ppp_priv_area = dev->priv;
3372 ppp508_connect_info_t *ppp508_connect_info;
3373 int err;
3374
3375 memset(&mb->cmd, 0, sizeof(ppp_cmd_t));
3376 mb->cmd.length = 0;
3377 mb->cmd.command = PPP_GET_CONNECTION_INFO;
3378 err = sdla_exec(mb) ? mb->cmd.result : CMD_TIMEOUT;
3379
3380 if (err != CMD_OK) {
3381 ppp_error(card, err, mb);
3382 ppp_priv_area->ip_remote = 0;
3383 ppp_priv_area->ip_local = 0;
3384 }
3385 else {
3386 ppp508_connect_info = (ppp508_connect_info_t *)mb->data;
3387 ppp_priv_area->ip_remote = ppp508_connect_info->ip_remote;
3388 ppp_priv_area->ip_local = ppp508_connect_info->ip_local;
3389
3390 NEX_PRINTK(KERN_INFO "READ CONNECTION GOT IP ADDRESS %x, %x\n",
3391 ppp_priv_area->ip_remote,
3392 ppp_priv_area->ip_local);
3393 }
3394
3395 return err;
3396 }
3397
3398 /*===============================================================================
3399 * config_ppp
3400 *
3401 * Configure the ppp protocol and enable communications.
3402 *
3403 * The if_open function binds this function to the poll routine.
3404 * Therefore, this function will run every time the ppp interface
3405 * is brought up.
3406 *
3407 * If the communications are not enabled, proceed to configure
3408 * the card and enable communications.
3409 *
3410 * If the communications are enabled, it means that the interface
3411 * was shutdown by ether the user or driver. In this case, we
3412 * have to check that the IP addresses have not changed. If
3413 * the IP addresses changed, we have to reconfigure the firmware
3414 * and update the changed IP addresses. Otherwise, just exit.
3415 */
3416 static int config_ppp (sdla_t *card)
3417 {
3418
3419 netdevice_t *dev = card->wandev.dev;
3420 ppp_flags_t *flags = card->flags;
3421 ppp_private_area_t *ppp_priv_area = dev->priv;
3422
3423 if (card->u.p.comm_enabled){
3424
3425 if (ppp_priv_area->ip_local_tmp != ppp_priv_area->ip_local ||
3426 ppp_priv_area->ip_remote_tmp != ppp_priv_area->ip_remote){
3427
3428 /* The IP addersses have changed, we must
3429 * stop the communications and reconfigure
3430 * the card. Reason: the firmware must know
3431 * the local and remote IP addresses. */
3432 disable_comm(card);
3433 wanpipe_set_state(card, WAN_DISCONNECTED);
3434 printk(KERN_INFO
3435 "%s: IP addresses changed!\n",
3436 card->devname);
3437 printk(KERN_INFO "%s: Restarting communications ...\n",
3438 card->devname);
3439 }else{
3440 /* IP addresses are the same and the link is up,
3441 * we dont have to do anything here. Therefore, exit */
3442 return 0;
3443 }
3444 }
3445
3446 /* Record the new IP addreses */
3447 ppp_priv_area->ip_local = ppp_priv_area->ip_local_tmp;
3448 ppp_priv_area->ip_remote = ppp_priv_area->ip_remote_tmp;
3449
3450 if (config508(dev, card)){
3451 printk(KERN_INFO "%s: Failed to configure PPP device\n",
3452 card->devname);
3453 return 0;
3454 }
3455
3456 if (ppp_set_intr_mode(card, PPP_INTR_RXRDY|
3457 PPP_INTR_TXRDY|
3458 PPP_INTR_MODEM|
3459 PPP_INTR_DISC |
3460 PPP_INTR_OPEN |
3461 PPP_INTR_DROP_DTR |
3462 PPP_INTR_TIMER)) {
3463
3464 printk(KERN_INFO "%s: Failed to configure board interrupts !\n",
3465 card->devname);
3466 return 0;
3467 }
3468
3469 /* Turn off the transmit and timer interrupt */
3470 flags->imask &= ~(PPP_INTR_TXRDY | PPP_INTR_TIMER) ;
3471
3472
3473 /* If you are not the authenticator and any one of the protocol is
3474 * enabled then we call the set_out_bound_authentication.
3475 */
3476 if ( !card->u.p.authenticator && (ppp_priv_area->pap || ppp_priv_area->chap)) {
3477 if ( ppp_set_outbnd_auth(card, ppp_priv_area) ){
3478 printk(KERN_INFO "%s: Outbound authentication failed !\n",
3479 card->devname);
3480 return 0;
3481 }
3482 }
3483
3484 /* If you are the authenticator and any one of the protocol is enabled
3485 * then we call the set_in_bound_authentication.
3486 */
3487 if (card->u.p.authenticator && (ppp_priv_area->pap || ppp_priv_area->chap)){
3488 if (ppp_set_inbnd_auth(card, ppp_priv_area)){
3489 printk(KERN_INFO "%s: Inbound authentication failed !\n",
3490 card->devname);
3491 return 0;
3492 }
3493 }
3494
3495 /* If we fail to enable communications here it's OK,
3496 * since the DTR timer will cause a disconnected, which
3497 * will retrigger communication in timer_intr() */
3498 if (ppp_comm_enable(card) == CMD_OK) {
3499 wanpipe_set_state(card, WAN_CONNECTING);
3500 init_ppp_tx_rx_buff(card);
3501 }
3502
3503 return 0;
3504 }
3505
3506 /*============================================================
3507 * ppp_poll
3508 *
3509 * Rationale:
3510 * We cannot manipulate the routing tables, or
3511 * ip addresses withing the interrupt. Therefore
3512 * we must perform such actons outside an interrupt
3513 * at a later time.
3514 *
3515 * Description:
3516 * PPP polling routine, responsible for
3517 * shutting down interfaces upon disconnect
3518 * and adding/removing routes.
3519 *
3520 * Usage:
3521 * This function is executed for each ppp
3522 * interface through a tq_schedule bottom half.
3523 *
3524 * trigger_ppp_poll() function is used to kick
3525 * the ppp_poll routine.
3526 */
3527 static void ppp_poll (netdevice_t *dev)
3528 {
3529 ppp_private_area_t *ppp_priv_area;
3530 sdla_t *card;
3531 u8 check_gateway=0;
3532 ppp_flags_t *flags;
3533
3534 if (!dev || (ppp_priv_area = dev->priv) == NULL)
3535 return;
3536
3537 card = ppp_priv_area->card;
3538 flags = card->flags;
3539
3540 /* Shutdown is in progress, stop what you are
3541 * doing and get out */
3542 if (test_bit(PERI_CRIT,&card->wandev.critical)){
3543 clear_bit(POLL_CRIT,&card->wandev.critical);
3544 return;
3545 }
3546
3547 /* if_open() function has triggered the polling routine
3548 * to determine the configured IP addresses. Once the
3549 * addresses are found, trigger the chdlc configuration */
3550 if (test_bit(0,&ppp_priv_area->config_ppp)){
3551
3552 ppp_priv_area->ip_local_tmp = get_ip_address(dev,WAN_LOCAL_IP);
3553 ppp_priv_area->ip_remote_tmp = get_ip_address(dev,WAN_POINTOPOINT_IP);
3554
3555 if (ppp_priv_area->ip_local_tmp == ppp_priv_area->ip_remote_tmp &&
3556 card->u.p.ip_mode == WANOPT_PPP_HOST){
3557
3558 if (++ppp_priv_area->ip_error > MAX_IP_ERRORS){
3559 printk(KERN_INFO "\n%s: --- WARNING ---\n",
3560 card->devname);
3561 printk(KERN_INFO "%s: The local IP address is the same as the\n",
3562 card->devname);
3563 printk(KERN_INFO "%s: Point-to-Point IP address.\n",
3564 card->devname);
3565 printk(KERN_INFO "%s: --- WARNING ---\n\n",
3566 card->devname);
3567 }else{
3568 clear_bit(POLL_CRIT,&card->wandev.critical);
3569 ppp_priv_area->poll_delay_timer.expires = jiffies+HZ;
3570 add_timer(&ppp_priv_area->poll_delay_timer);
3571 return;
3572 }
3573 }
3574
3575 ppp_priv_area->timer_int_enabled |= TMR_INT_ENABLED_CONFIG;
3576 flags->imask |= PPP_INTR_TIMER;
3577 ppp_priv_area->ip_error=0;
3578
3579 clear_bit(0,&ppp_priv_area->config_ppp);
3580 clear_bit(POLL_CRIT,&card->wandev.critical);
3581 return;
3582 }
3583
3584 /* Dynamic interface implementation, as well as dynamic
3585 * routing. */
3586
3587 switch (card->wandev.state) {
3588
3589 case WAN_DISCONNECTED:
3590
3591 /* If the dynamic interface configuration is on, and interface
3592 * is up, then bring down the netowrk interface */
3593
3594 if (test_bit(DYN_OPT_ON,&ppp_priv_area->interface_down) &&
3595 !test_bit(DEV_DOWN,&ppp_priv_area->interface_down) &&
3596 card->wandev.dev->flags & IFF_UP){
3597
3598 printk(KERN_INFO "%s: Interface %s down.\n",
3599 card->devname,card->wandev.dev->name);
3600 change_dev_flags(card->wandev.dev,
3601 (card->wandev.dev->flags&~IFF_UP));
3602 set_bit(DEV_DOWN,&ppp_priv_area->interface_down);
3603 }else{
3604 /* We need to check if the local IP address is
3605 * zero. If it is, we shouldn't try to remove it.
3606 * For some reason the kernel crashes badly if
3607 * we try to remove the route twice */
3608
3609 if (card->wandev.dev->flags & IFF_UP &&
3610 get_ip_address(card->wandev.dev,WAN_LOCAL_IP) &&
3611 card->u.p.ip_mode == WANOPT_PPP_PEER){
3612
3613 remove_route(card);
3614 }
3615 }
3616 break;
3617
3618 case WAN_CONNECTED:
3619
3620 /* In SMP machine this code can execute before the interface
3621 * comes up. In this case, we must make sure that we do not
3622 * try to bring up the interface before dev_open() is finished */
3623
3624
3625 /* DEV_DOWN will be set only when we bring down the interface
3626 * for the very first time. This way we know that it was us
3627 * that brought the interface down */
3628
3629 if (test_bit(DYN_OPT_ON,&ppp_priv_area->interface_down) &&
3630 test_bit(DEV_DOWN, &ppp_priv_area->interface_down) &&
3631 !(card->wandev.dev->flags & IFF_UP)){
3632
3633 printk(KERN_INFO "%s: Interface %s up.\n",
3634 card->devname,card->wandev.dev->name);
3635
3636 change_dev_flags(card->wandev.dev,(card->wandev.dev->flags|IFF_UP));
3637 clear_bit(DEV_DOWN,&ppp_priv_area->interface_down);
3638 check_gateway=1;
3639 }
3640
3641 if ((card->u.p.ip_mode == WANOPT_PPP_PEER) &&
3642 test_bit(1,&Read_connection_info)) {
3643
3644 process_route(card);
3645 clear_bit(1,&Read_connection_info);
3646 check_gateway=1;
3647 }
3648
3649 if (ppp_priv_area->gateway && check_gateway)
3650 add_gateway(card,dev);
3651
3652 break;
3653 }
3654 clear_bit(POLL_CRIT,&card->wandev.critical);
3655 return;
3656 }
3657
3658 /*============================================================
3659 * trigger_ppp_poll
3660 *
3661 * Description:
3662 * Add a ppp_poll() task into a tq_scheduler bh handler
3663 * for a specific interface. This will kick
3664 * the ppp_poll() routine at a later time.
3665 *
3666 * Usage:
3667 * Interrupts use this to defer a taks to
3668 * a polling routine.
3669 *
3670 */
3671
3672 static void trigger_ppp_poll (netdevice_t *dev)
3673 {
3674 ppp_private_area_t *ppp_priv_area;
3675 if ((ppp_priv_area=dev->priv) != NULL){
3676
3677 sdla_t *card = ppp_priv_area->card;
3678
3679 if (test_bit(PERI_CRIT,&card->wandev.critical)){
3680 return;
3681 }
3682
3683 if (test_and_set_bit(POLL_CRIT,&card->wandev.critical)){
3684 return;
3685 }
3686
3687 #ifdef LINUX_2_4
3688 schedule_task(&ppp_priv_area->poll_task);
3689 #else
3690 queue_task(&ppp_priv_area->poll_task, &tq_scheduler);
3691 #endif
3692 }
3693 return;
3694 }
3695
3696 static void ppp_poll_delay (unsigned long dev_ptr)
3697 {
3698 netdevice_t *dev = (netdevice_t *)dev_ptr;
3699 trigger_ppp_poll(dev);
3700 }
3701
3702 /*============================================================
3703 * detect_and_fix_tx_bug
3704 *
3705 * Description:
3706 * On connect, if the board tx buffer ptr is not the same
3707 * as the driver tx buffer ptr, we found a firmware bug.
3708 * Report the bug to the above layer. To fix the
3709 * error restart communications again.
3710 *
3711 * Usage:
3712 *
3713 */
3714
3715 static int detect_and_fix_tx_bug (sdla_t *card)
3716 {
3717 if (((unsigned long)card->u.p.txbuf_base&0xFFF) != ((*card->u.p.txbuf_next)&0xFFF)){
3718 NEX_PRINTK(KERN_INFO "Major Error, Fix the bug\n");
3719 return 1;
3720 }
3721 return 0;
3722 }
3723
3724 MODULE_LICENSE("GPL");
3725
3726 /****** End *****************************************************************/
3727