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