net: replace remaining __FUNCTION__ occurrences
[linux-2.6.git] / net / irda / irlan / irlan_common.c
1 /*********************************************************************
2  *
3  * Filename:      irlan_common.c
4  * Version:       0.9
5  * Description:   IrDA LAN Access Protocol Implementation
6  * Status:        Experimental.
7  * Author:        Dag Brattli <dagb@cs.uit.no>
8  * Created at:    Sun Aug 31 20:14:37 1997
9  * Modified at:   Sun Dec 26 21:53:10 1999
10  * Modified by:   Dag Brattli <dagb@cs.uit.no>
11  *
12  *     Copyright (c) 1997, 1999 Dag Brattli <dagb@cs.uit.no>,
13  *     All Rights Reserved.
14  *
15  *     This program is free software; you can redistribute it and/or
16  *     modify it under the terms of the GNU General Public License as
17  *     published by the Free Software Foundation; either version 2 of
18  *     the License, or (at your option) any later version.
19  *
20  *     Neither Dag Brattli nor University of Tromsø admit liability nor
21  *     provide warranty for any of this software. This material is
22  *     provided "AS-IS" and at no charge.
23  *
24  ********************************************************************/
25
26 #include <linux/module.h>
27
28 #include <linux/kernel.h>
29 #include <linux/string.h>
30 #include <linux/init.h>
31 #include <linux/errno.h>
32 #include <linux/proc_fs.h>
33 #include <linux/seq_file.h>
34 #include <linux/random.h>
35 #include <linux/netdevice.h>
36 #include <linux/etherdevice.h>
37 #include <linux/rtnetlink.h>
38 #include <linux/moduleparam.h>
39 #include <linux/bitops.h>
40
41 #include <asm/system.h>
42 #include <asm/byteorder.h>
43
44 #include <net/irda/irda.h>
45 #include <net/irda/irttp.h>
46 #include <net/irda/irlmp.h>
47 #include <net/irda/iriap.h>
48 #include <net/irda/timer.h>
49
50 #include <net/irda/irlan_common.h>
51 #include <net/irda/irlan_client.h>
52 #include <net/irda/irlan_provider.h>
53 #include <net/irda/irlan_eth.h>
54 #include <net/irda/irlan_filter.h>
55
56
57 /*
58  * Send gratuitous ARP when connected to a new AP or not. May be a clever
59  * thing to do, but for some reason the machine crashes if you use DHCP. So
60  * lets not use it by default.
61  */
62 #undef CONFIG_IRLAN_SEND_GRATUITOUS_ARP
63
64 /* extern char sysctl_devname[]; */
65
66 /*
67  *  Master structure
68  */
69 static LIST_HEAD(irlans);
70
71 static void *ckey;
72 static void *skey;
73
74 /* Module parameters */
75 static int eth;   /* Use "eth" or "irlan" name for devices */
76 static int access = ACCESS_PEER; /* PEER, DIRECT or HOSTED */
77
78 #ifdef CONFIG_PROC_FS
79 static const char *irlan_access[] = {
80         "UNKNOWN",
81         "DIRECT",
82         "PEER",
83         "HOSTED"
84 };
85
86 static const char *irlan_media[] = {
87         "UNKNOWN",
88         "802.3",
89         "802.5"
90 };
91
92 extern struct proc_dir_entry *proc_irda;
93
94 static int irlan_seq_open(struct inode *inode, struct file *file);
95
96 static const struct file_operations irlan_fops = {
97         .owner   = THIS_MODULE,
98         .open    = irlan_seq_open,
99         .read    = seq_read,
100         .llseek  = seq_lseek,
101         .release = seq_release,
102 };
103
104 extern struct proc_dir_entry *proc_irda;
105 #endif /* CONFIG_PROC_FS */
106
107 static struct irlan_cb *irlan_open(__u32 saddr, __u32 daddr);
108 static void __irlan_close(struct irlan_cb *self);
109 static int __irlan_insert_param(struct sk_buff *skb, char *param, int type,
110                                 __u8 value_byte, __u16 value_short,
111                                 __u8 *value_array, __u16 value_len);
112 static void irlan_open_unicast_addr(struct irlan_cb *self);
113 static void irlan_get_unicast_addr(struct irlan_cb *self);
114 void irlan_close_tsaps(struct irlan_cb *self);
115
116 /*
117  * Function irlan_init (void)
118  *
119  *    Initialize IrLAN layer
120  *
121  */
122 static int __init irlan_init(void)
123 {
124         struct irlan_cb *new;
125         __u16 hints;
126
127         IRDA_DEBUG(2, "%s()\n", __func__ );
128
129 #ifdef CONFIG_PROC_FS
130         { struct proc_dir_entry *proc;
131         proc = proc_create("irlan", 0, proc_irda, &irlan_fops);
132         if (!proc) {
133                 printk(KERN_ERR "irlan_init: can't create /proc entry!\n");
134                 return -ENODEV;
135         }
136         }
137 #endif /* CONFIG_PROC_FS */
138
139         IRDA_DEBUG(4, "%s()\n", __func__ );
140         hints = irlmp_service_to_hint(S_LAN);
141
142         /* Register with IrLMP as a client */
143         ckey = irlmp_register_client(hints, &irlan_client_discovery_indication,
144                                      NULL, NULL);
145         if (!ckey)
146                 goto err_ckey;
147
148         /* Register with IrLMP as a service */
149         skey = irlmp_register_service(hints);
150         if (!skey)
151                 goto err_skey;
152
153         /* Start the master IrLAN instance (the only one for now) */
154         new = irlan_open(DEV_ADDR_ANY, DEV_ADDR_ANY);
155         if (!new)
156                 goto err_open;
157
158         /* The master will only open its (listen) control TSAP */
159         irlan_provider_open_ctrl_tsap(new);
160
161         /* Do some fast discovery! */
162         irlmp_discovery_request(DISCOVERY_DEFAULT_SLOTS);
163
164         return 0;
165
166 err_open:
167         irlmp_unregister_service(skey);
168 err_skey:
169         irlmp_unregister_client(ckey);
170 err_ckey:
171 #ifdef CONFIG_PROC_FS
172         remove_proc_entry("irlan", proc_irda);
173 #endif /* CONFIG_PROC_FS */
174
175         return -ENOMEM;
176 }
177
178 static void __exit irlan_cleanup(void)
179 {
180         struct irlan_cb *self, *next;
181
182         IRDA_DEBUG(4, "%s()\n", __func__ );
183
184         irlmp_unregister_client(ckey);
185         irlmp_unregister_service(skey);
186
187 #ifdef CONFIG_PROC_FS
188         remove_proc_entry("irlan", proc_irda);
189 #endif /* CONFIG_PROC_FS */
190
191         /* Cleanup any leftover network devices */
192         rtnl_lock();
193         list_for_each_entry_safe(self, next, &irlans, dev_list) {
194                 __irlan_close(self);
195         }
196         rtnl_unlock();
197 }
198
199 /*
200  * Function irlan_open (void)
201  *
202  *    Open new instance of a client/provider, we should only register the
203  *    network device if this instance is ment for a particular client/provider
204  */
205 static struct irlan_cb *irlan_open(__u32 saddr, __u32 daddr)
206 {
207         struct net_device *dev;
208         struct irlan_cb *self;
209
210         IRDA_DEBUG(2, "%s()\n", __func__ );
211
212         /* Create network device with irlan */
213         dev = alloc_irlandev(eth ? "eth%d" : "irlan%d");
214         if (!dev)
215                 return NULL;
216
217         self = dev->priv;
218         self->dev = dev;
219
220         /*
221          *  Initialize local device structure
222          */
223         self->magic = IRLAN_MAGIC;
224         self->saddr = saddr;
225         self->daddr = daddr;
226
227         /* Provider access can only be PEER, DIRECT, or HOSTED */
228         self->provider.access_type = access;
229         if (access == ACCESS_DIRECT) {
230                 /*
231                  * Since we are emulating an IrLAN sever we will have to
232                  * give ourself an ethernet address!
233                  */
234                 dev->dev_addr[0] = 0x40;
235                 dev->dev_addr[1] = 0x00;
236                 dev->dev_addr[2] = 0x00;
237                 dev->dev_addr[3] = 0x00;
238                 get_random_bytes(dev->dev_addr+4, 1);
239                 get_random_bytes(dev->dev_addr+5, 1);
240         }
241
242         self->media = MEDIA_802_3;
243         self->disconnect_reason = LM_USER_REQUEST;
244         init_timer(&self->watchdog_timer);
245         init_timer(&self->client.kick_timer);
246         init_waitqueue_head(&self->open_wait);
247
248         skb_queue_head_init(&self->client.txq);
249
250         irlan_next_client_state(self, IRLAN_IDLE);
251         irlan_next_provider_state(self, IRLAN_IDLE);
252
253         if (register_netdev(dev)) {
254                 IRDA_DEBUG(2, "%s(), register_netdev() failed!\n",
255                            __func__ );
256                 self = NULL;
257                 free_netdev(dev);
258         } else {
259                 rtnl_lock();
260                 list_add_rcu(&self->dev_list, &irlans);
261                 rtnl_unlock();
262         }
263
264         return self;
265 }
266 /*
267  * Function __irlan_close (self)
268  *
269  *    This function closes and deallocates the IrLAN client instances. Be
270  *    aware that other functions which calls client_close() must
271  *    remove self from irlans list first.
272  */
273 static void __irlan_close(struct irlan_cb *self)
274 {
275         IRDA_DEBUG(2, "%s()\n", __func__ );
276
277         ASSERT_RTNL();
278         IRDA_ASSERT(self != NULL, return;);
279         IRDA_ASSERT(self->magic == IRLAN_MAGIC, return;);
280
281         del_timer_sync(&self->watchdog_timer);
282         del_timer_sync(&self->client.kick_timer);
283
284         /* Close all open connections and remove TSAPs */
285         irlan_close_tsaps(self);
286
287         if (self->client.iriap)
288                 iriap_close(self->client.iriap);
289
290         /* Remove frames queued on the control channel */
291         skb_queue_purge(&self->client.txq);
292
293         /* Unregister and free self via destructor */
294         unregister_netdevice(self->dev);
295 }
296
297 /* Find any instance of irlan, used for client discovery wakeup */
298 struct irlan_cb *irlan_get_any(void)
299 {
300         struct irlan_cb *self;
301
302         list_for_each_entry_rcu(self, &irlans, dev_list) {
303                 return self;
304         }
305         return NULL;
306 }
307
308 /*
309  * Function irlan_connect_indication (instance, sap, qos, max_sdu_size, skb)
310  *
311  *    Here we receive the connect indication for the data channel
312  *
313  */
314 static void irlan_connect_indication(void *instance, void *sap,
315                                      struct qos_info *qos,
316                                      __u32 max_sdu_size,
317                                      __u8 max_header_size,
318                                      struct sk_buff *skb)
319 {
320         struct irlan_cb *self;
321         struct tsap_cb *tsap;
322
323         IRDA_DEBUG(2, "%s()\n", __func__ );
324
325         self = (struct irlan_cb *) instance;
326         tsap = (struct tsap_cb *) sap;
327
328         IRDA_ASSERT(self != NULL, return;);
329         IRDA_ASSERT(self->magic == IRLAN_MAGIC, return;);
330         IRDA_ASSERT(tsap == self->tsap_data,return;);
331
332         self->max_sdu_size = max_sdu_size;
333         self->max_header_size = max_header_size;
334
335         IRDA_DEBUG(0, "%s: We are now connected!\n", __func__);
336
337         del_timer(&self->watchdog_timer);
338
339         /* If you want to pass the skb to *both* state machines, you will
340          * need to skb_clone() it, so that you don't free it twice.
341          * As the state machines don't need it, git rid of it here...
342          * Jean II */
343         if (skb)
344                 dev_kfree_skb(skb);
345
346         irlan_do_provider_event(self, IRLAN_DATA_CONNECT_INDICATION, NULL);
347         irlan_do_client_event(self, IRLAN_DATA_CONNECT_INDICATION, NULL);
348
349         if (self->provider.access_type == ACCESS_PEER) {
350                 /*
351                  * Data channel is open, so we are now allowed to
352                  * configure the remote filter
353                  */
354                 irlan_get_unicast_addr(self);
355                 irlan_open_unicast_addr(self);
356         }
357         /* Ready to transfer Ethernet frames (at last) */
358         netif_start_queue(self->dev); /* Clear reason */
359 }
360
361 static void irlan_connect_confirm(void *instance, void *sap,
362                                   struct qos_info *qos,
363                                   __u32 max_sdu_size,
364                                   __u8 max_header_size,
365                                   struct sk_buff *skb)
366 {
367         struct irlan_cb *self;
368
369         self = (struct irlan_cb *) instance;
370
371         IRDA_ASSERT(self != NULL, return;);
372         IRDA_ASSERT(self->magic == IRLAN_MAGIC, return;);
373
374         self->max_sdu_size = max_sdu_size;
375         self->max_header_size = max_header_size;
376
377         /* TODO: we could set the MTU depending on the max_sdu_size */
378
379         IRDA_DEBUG(0, "%s: We are now connected!\n", __func__);
380         del_timer(&self->watchdog_timer);
381
382         /*
383          * Data channel is open, so we are now allowed to configure the remote
384          * filter
385          */
386         irlan_get_unicast_addr(self);
387         irlan_open_unicast_addr(self);
388
389         /* Open broadcast and multicast filter by default */
390         irlan_set_broadcast_filter(self, TRUE);
391         irlan_set_multicast_filter(self, TRUE);
392
393         /* Ready to transfer Ethernet frames */
394         netif_start_queue(self->dev);
395         self->disconnect_reason = 0; /* Clear reason */
396 #ifdef CONFIG_IRLAN_SEND_GRATUITOUS_ARP
397         irlan_eth_send_gratuitous_arp(&self->dev);
398 #endif
399         wake_up_interruptible(&self->open_wait);
400 }
401
402 /*
403  * Function irlan_client_disconnect_indication (handle)
404  *
405  *    Callback function for the IrTTP layer. Indicates a disconnection of
406  *    the specified connection (handle)
407  */
408 static void irlan_disconnect_indication(void *instance,
409                                         void *sap, LM_REASON reason,
410                                         struct sk_buff *userdata)
411 {
412         struct irlan_cb *self;
413         struct tsap_cb *tsap;
414
415         IRDA_DEBUG(0, "%s(), reason=%d\n", __func__ , reason);
416
417         self = (struct irlan_cb *) instance;
418         tsap = (struct tsap_cb *) sap;
419
420         IRDA_ASSERT(self != NULL, return;);
421         IRDA_ASSERT(self->magic == IRLAN_MAGIC, return;);
422         IRDA_ASSERT(tsap != NULL, return;);
423         IRDA_ASSERT(tsap->magic == TTP_TSAP_MAGIC, return;);
424
425         IRDA_ASSERT(tsap == self->tsap_data, return;);
426
427         IRDA_DEBUG(2, "IrLAN, data channel disconnected by peer!\n");
428
429         /* Save reason so we know if we should try to reconnect or not */
430         self->disconnect_reason = reason;
431
432         switch (reason) {
433         case LM_USER_REQUEST: /* User request */
434                 IRDA_DEBUG(2, "%s(), User requested\n", __func__ );
435                 break;
436         case LM_LAP_DISCONNECT: /* Unexpected IrLAP disconnect */
437                 IRDA_DEBUG(2, "%s(), Unexpected IrLAP disconnect\n", __func__ );
438                 break;
439         case LM_CONNECT_FAILURE: /* Failed to establish IrLAP connection */
440                 IRDA_DEBUG(2, "%s(), IrLAP connect failed\n", __func__ );
441                 break;
442         case LM_LAP_RESET:  /* IrLAP reset */
443                 IRDA_DEBUG(2, "%s(), IrLAP reset\n", __func__ );
444                 break;
445         case LM_INIT_DISCONNECT:
446                 IRDA_DEBUG(2, "%s(), IrLMP connect failed\n", __func__ );
447                 break;
448         default:
449                 IRDA_ERROR("%s(), Unknown disconnect reason\n", __func__);
450                 break;
451         }
452
453         /* If you want to pass the skb to *both* state machines, you will
454          * need to skb_clone() it, so that you don't free it twice.
455          * As the state machines don't need it, git rid of it here...
456          * Jean II */
457         if (userdata)
458                 dev_kfree_skb(userdata);
459
460         irlan_do_client_event(self, IRLAN_LMP_DISCONNECT, NULL);
461         irlan_do_provider_event(self, IRLAN_LMP_DISCONNECT, NULL);
462
463         wake_up_interruptible(&self->open_wait);
464 }
465
466 void irlan_open_data_tsap(struct irlan_cb *self)
467 {
468         struct tsap_cb *tsap;
469         notify_t notify;
470
471         IRDA_DEBUG(2, "%s()\n", __func__ );
472
473         IRDA_ASSERT(self != NULL, return;);
474         IRDA_ASSERT(self->magic == IRLAN_MAGIC, return;);
475
476         /* Check if already open */
477         if (self->tsap_data)
478                 return;
479
480         irda_notify_init(&notify);
481
482         notify.data_indication       = irlan_eth_receive;
483         notify.udata_indication      = irlan_eth_receive;
484         notify.connect_indication    = irlan_connect_indication;
485         notify.connect_confirm       = irlan_connect_confirm;
486         notify.flow_indication       = irlan_eth_flow_indication;
487         notify.disconnect_indication = irlan_disconnect_indication;
488         notify.instance              = self;
489         strlcpy(notify.name, "IrLAN data", sizeof(notify.name));
490
491         tsap = irttp_open_tsap(LSAP_ANY, DEFAULT_INITIAL_CREDIT, &notify);
492         if (!tsap) {
493                 IRDA_DEBUG(2, "%s(), Got no tsap!\n", __func__ );
494                 return;
495         }
496         self->tsap_data = tsap;
497
498         /*
499          *  This is the data TSAP selector which we will pass to the client
500          *  when the client ask for it.
501          */
502         self->stsap_sel_data = self->tsap_data->stsap_sel;
503 }
504
505 void irlan_close_tsaps(struct irlan_cb *self)
506 {
507         IRDA_DEBUG(4, "%s()\n", __func__ );
508
509         IRDA_ASSERT(self != NULL, return;);
510         IRDA_ASSERT(self->magic == IRLAN_MAGIC, return;);
511
512         /* Disconnect and close all open TSAP connections */
513         if (self->tsap_data) {
514                 irttp_disconnect_request(self->tsap_data, NULL, P_NORMAL);
515                 irttp_close_tsap(self->tsap_data);
516                 self->tsap_data = NULL;
517         }
518         if (self->client.tsap_ctrl) {
519                 irttp_disconnect_request(self->client.tsap_ctrl, NULL,
520                                          P_NORMAL);
521                 irttp_close_tsap(self->client.tsap_ctrl);
522                 self->client.tsap_ctrl = NULL;
523         }
524         if (self->provider.tsap_ctrl) {
525                 irttp_disconnect_request(self->provider.tsap_ctrl, NULL,
526                                          P_NORMAL);
527                 irttp_close_tsap(self->provider.tsap_ctrl);
528                 self->provider.tsap_ctrl = NULL;
529         }
530         self->disconnect_reason = LM_USER_REQUEST;
531 }
532
533 /*
534  * Function irlan_ias_register (self, tsap_sel)
535  *
536  *    Register with LM-IAS
537  *
538  */
539 void irlan_ias_register(struct irlan_cb *self, __u8 tsap_sel)
540 {
541         struct ias_object *obj;
542         struct ias_value *new_value;
543
544         IRDA_ASSERT(self != NULL, return;);
545         IRDA_ASSERT(self->magic == IRLAN_MAGIC, return;);
546
547         /*
548          * Check if object has already been registered by a previous provider.
549          * If that is the case, we just change the value of the attribute
550          */
551         if (!irias_find_object("IrLAN")) {
552                 obj = irias_new_object("IrLAN", IAS_IRLAN_ID);
553                 irias_add_integer_attrib(obj, "IrDA:TinyTP:LsapSel", tsap_sel,
554                                          IAS_KERNEL_ATTR);
555                 irias_insert_object(obj);
556         } else {
557                 new_value = irias_new_integer_value(tsap_sel);
558                 irias_object_change_attribute("IrLAN", "IrDA:TinyTP:LsapSel",
559                                               new_value);
560         }
561
562         /* Register PnP object only if not registered before */
563         if (!irias_find_object("PnP")) {
564                 obj = irias_new_object("PnP", IAS_PNP_ID);
565 #if 0
566                 irias_add_string_attrib(obj, "Name", sysctl_devname,
567                                         IAS_KERNEL_ATTR);
568 #else
569                 irias_add_string_attrib(obj, "Name", "Linux", IAS_KERNEL_ATTR);
570 #endif
571                 irias_add_string_attrib(obj, "DeviceID", "HWP19F0",
572                                         IAS_KERNEL_ATTR);
573                 irias_add_integer_attrib(obj, "CompCnt", 1, IAS_KERNEL_ATTR);
574                 if (self->provider.access_type == ACCESS_PEER)
575                         irias_add_string_attrib(obj, "Comp#01", "PNP8389",
576                                                 IAS_KERNEL_ATTR);
577                 else
578                         irias_add_string_attrib(obj, "Comp#01", "PNP8294",
579                                                 IAS_KERNEL_ATTR);
580
581                 irias_add_string_attrib(obj, "Manufacturer",
582                                         "Linux-IrDA Project", IAS_KERNEL_ATTR);
583                 irias_insert_object(obj);
584         }
585 }
586
587 /*
588  * Function irlan_run_ctrl_tx_queue (self)
589  *
590  *    Try to send the next command in the control transmit queue
591  *
592  */
593 int irlan_run_ctrl_tx_queue(struct irlan_cb *self)
594 {
595         struct sk_buff *skb;
596
597         IRDA_DEBUG(2, "%s()\n", __func__ );
598
599         if (irda_lock(&self->client.tx_busy) == FALSE)
600                 return -EBUSY;
601
602         skb = skb_dequeue(&self->client.txq);
603         if (!skb) {
604                 self->client.tx_busy = FALSE;
605                 return 0;
606         }
607
608         /* Check that it's really possible to send commands */
609         if ((self->client.tsap_ctrl == NULL) ||
610             (self->client.state == IRLAN_IDLE))
611         {
612                 self->client.tx_busy = FALSE;
613                 dev_kfree_skb(skb);
614                 return -1;
615         }
616         IRDA_DEBUG(2, "%s(), sending ...\n", __func__ );
617
618         return irttp_data_request(self->client.tsap_ctrl, skb);
619 }
620
621 /*
622  * Function irlan_ctrl_data_request (self, skb)
623  *
624  *    This function makes sure that commands on the control channel is being
625  *    sent in a command/response fashion
626  */
627 static void irlan_ctrl_data_request(struct irlan_cb *self, struct sk_buff *skb)
628 {
629         IRDA_DEBUG(2, "%s()\n", __func__ );
630
631         /* Queue command */
632         skb_queue_tail(&self->client.txq, skb);
633
634         /* Try to send command */
635         irlan_run_ctrl_tx_queue(self);
636 }
637
638 /*
639  * Function irlan_get_provider_info (self)
640  *
641  *    Send Get Provider Information command to peer IrLAN layer
642  *
643  */
644 void irlan_get_provider_info(struct irlan_cb *self)
645 {
646         struct sk_buff *skb;
647         __u8 *frame;
648
649         IRDA_DEBUG(4, "%s()\n", __func__ );
650
651         IRDA_ASSERT(self != NULL, return;);
652         IRDA_ASSERT(self->magic == IRLAN_MAGIC, return;);
653
654         skb = alloc_skb(IRLAN_MAX_HEADER + IRLAN_CMD_HEADER,
655                         GFP_ATOMIC);
656         if (!skb)
657                 return;
658
659         /* Reserve space for TTP, LMP, and LAP header */
660         skb_reserve(skb, self->client.max_header_size);
661         skb_put(skb, 2);
662
663         frame = skb->data;
664
665         frame[0] = CMD_GET_PROVIDER_INFO;
666         frame[1] = 0x00;                 /* Zero parameters */
667
668         irlan_ctrl_data_request(self, skb);
669 }
670
671 /*
672  * Function irlan_open_data_channel (self)
673  *
674  *    Send an Open Data Command to provider
675  *
676  */
677 void irlan_open_data_channel(struct irlan_cb *self)
678 {
679         struct sk_buff *skb;
680         __u8 *frame;
681
682         IRDA_DEBUG(4, "%s()\n", __func__ );
683
684         IRDA_ASSERT(self != NULL, return;);
685         IRDA_ASSERT(self->magic == IRLAN_MAGIC, return;);
686
687         skb = alloc_skb(IRLAN_MAX_HEADER + IRLAN_CMD_HEADER +
688                         IRLAN_STRING_PARAMETER_LEN("MEDIA", "802.3") +
689                         IRLAN_STRING_PARAMETER_LEN("ACCESS_TYPE", "DIRECT"),
690                         GFP_ATOMIC);
691         if (!skb)
692                 return;
693
694         skb_reserve(skb, self->client.max_header_size);
695         skb_put(skb, 2);
696
697         frame = skb->data;
698
699         /* Build frame */
700         frame[0] = CMD_OPEN_DATA_CHANNEL;
701         frame[1] = 0x02; /* Two parameters */
702
703         irlan_insert_string_param(skb, "MEDIA", "802.3");
704         irlan_insert_string_param(skb, "ACCESS_TYPE", "DIRECT");
705         /* irlan_insert_string_param(skb, "MODE", "UNRELIABLE"); */
706
707 /*      self->use_udata = TRUE; */
708
709         irlan_ctrl_data_request(self, skb);
710 }
711
712 void irlan_close_data_channel(struct irlan_cb *self)
713 {
714         struct sk_buff *skb;
715         __u8 *frame;
716
717         IRDA_DEBUG(4, "%s()\n", __func__ );
718
719         IRDA_ASSERT(self != NULL, return;);
720         IRDA_ASSERT(self->magic == IRLAN_MAGIC, return;);
721
722         /* Check if the TSAP is still there */
723         if (self->client.tsap_ctrl == NULL)
724                 return;
725
726         skb = alloc_skb(IRLAN_MAX_HEADER + IRLAN_CMD_HEADER +
727                         IRLAN_BYTE_PARAMETER_LEN("DATA_CHAN"),
728                         GFP_ATOMIC);
729         if (!skb)
730                 return;
731
732         skb_reserve(skb, self->client.max_header_size);
733         skb_put(skb, 2);
734
735         frame = skb->data;
736
737         /* Build frame */
738         frame[0] = CMD_CLOSE_DATA_CHAN;
739         frame[1] = 0x01; /* One parameter */
740
741         irlan_insert_byte_param(skb, "DATA_CHAN", self->dtsap_sel_data);
742
743         irlan_ctrl_data_request(self, skb);
744 }
745
746 /*
747  * Function irlan_open_unicast_addr (self)
748  *
749  *    Make IrLAN provider accept ethernet frames addressed to the unicast
750  *    address.
751  *
752  */
753 static void irlan_open_unicast_addr(struct irlan_cb *self)
754 {
755         struct sk_buff *skb;
756         __u8 *frame;
757
758         IRDA_DEBUG(4, "%s()\n", __func__ );
759
760         IRDA_ASSERT(self != NULL, return;);
761         IRDA_ASSERT(self->magic == IRLAN_MAGIC, return;);
762
763         skb = alloc_skb(IRLAN_MAX_HEADER + IRLAN_CMD_HEADER +
764                         IRLAN_BYTE_PARAMETER_LEN("DATA_CHAN") +
765                         IRLAN_STRING_PARAMETER_LEN("FILTER_TYPE", "DIRECTED") +
766                         IRLAN_STRING_PARAMETER_LEN("FILTER_MODE", "FILTER"),
767                         GFP_ATOMIC);
768         if (!skb)
769                 return;
770
771         /* Reserve space for TTP, LMP, and LAP header */
772         skb_reserve(skb, self->max_header_size);
773         skb_put(skb, 2);
774
775         frame = skb->data;
776
777         frame[0] = CMD_FILTER_OPERATION;
778         frame[1] = 0x03;                 /* Three parameters */
779         irlan_insert_byte_param(skb, "DATA_CHAN" , self->dtsap_sel_data);
780         irlan_insert_string_param(skb, "FILTER_TYPE", "DIRECTED");
781         irlan_insert_string_param(skb, "FILTER_MODE", "FILTER");
782
783         irlan_ctrl_data_request(self, skb);
784 }
785
786 /*
787  * Function irlan_set_broadcast_filter (self, status)
788  *
789  *    Make IrLAN provider accept ethernet frames addressed to the broadcast
790  *    address. Be careful with the use of this one, since there may be a lot
791  *    of broadcast traffic out there. We can still function without this
792  *    one but then _we_ have to initiate all communication with other
793  *    hosts, since ARP request for this host will not be answered.
794  */
795 void irlan_set_broadcast_filter(struct irlan_cb *self, int status)
796 {
797         struct sk_buff *skb;
798         __u8 *frame;
799
800         IRDA_DEBUG(2, "%s()\n", __func__ );
801
802         IRDA_ASSERT(self != NULL, return;);
803         IRDA_ASSERT(self->magic == IRLAN_MAGIC, return;);
804
805         skb = alloc_skb(IRLAN_MAX_HEADER + IRLAN_CMD_HEADER +
806                         IRLAN_BYTE_PARAMETER_LEN("DATA_CHAN") +
807                         IRLAN_STRING_PARAMETER_LEN("FILTER_TYPE", "BROADCAST") +
808                         /* We may waste one byte here...*/
809                         IRLAN_STRING_PARAMETER_LEN("FILTER_MODE", "FILTER"),
810                         GFP_ATOMIC);
811         if (!skb)
812                 return;
813
814         /* Reserve space for TTP, LMP, and LAP header */
815         skb_reserve(skb, self->client.max_header_size);
816         skb_put(skb, 2);
817
818         frame = skb->data;
819
820         frame[0] = CMD_FILTER_OPERATION;
821         frame[1] = 0x03;                 /* Three parameters */
822         irlan_insert_byte_param(skb, "DATA_CHAN", self->dtsap_sel_data);
823         irlan_insert_string_param(skb, "FILTER_TYPE", "BROADCAST");
824         if (status)
825                 irlan_insert_string_param(skb, "FILTER_MODE", "FILTER");
826         else
827                 irlan_insert_string_param(skb, "FILTER_MODE", "NONE");
828
829         irlan_ctrl_data_request(self, skb);
830 }
831
832 /*
833  * Function irlan_set_multicast_filter (self, status)
834  *
835  *    Make IrLAN provider accept ethernet frames addressed to the multicast
836  *    address.
837  *
838  */
839 void irlan_set_multicast_filter(struct irlan_cb *self, int status)
840 {
841         struct sk_buff *skb;
842         __u8 *frame;
843
844         IRDA_DEBUG(2, "%s()\n", __func__ );
845
846         IRDA_ASSERT(self != NULL, return;);
847         IRDA_ASSERT(self->magic == IRLAN_MAGIC, return;);
848
849         skb = alloc_skb(IRLAN_MAX_HEADER + IRLAN_CMD_HEADER +
850                         IRLAN_BYTE_PARAMETER_LEN("DATA_CHAN") +
851                         IRLAN_STRING_PARAMETER_LEN("FILTER_TYPE", "MULTICAST") +
852                         /* We may waste one byte here...*/
853                         IRLAN_STRING_PARAMETER_LEN("FILTER_MODE", "NONE"),
854                         GFP_ATOMIC);
855         if (!skb)
856                 return;
857
858         /* Reserve space for TTP, LMP, and LAP header */
859         skb_reserve(skb, self->client.max_header_size);
860         skb_put(skb, 2);
861
862         frame = skb->data;
863
864         frame[0] = CMD_FILTER_OPERATION;
865         frame[1] = 0x03;                 /* Three parameters */
866         irlan_insert_byte_param(skb, "DATA_CHAN", self->dtsap_sel_data);
867         irlan_insert_string_param(skb, "FILTER_TYPE", "MULTICAST");
868         if (status)
869                 irlan_insert_string_param(skb, "FILTER_MODE", "ALL");
870         else
871                 irlan_insert_string_param(skb, "FILTER_MODE", "NONE");
872
873         irlan_ctrl_data_request(self, skb);
874 }
875
876 /*
877  * Function irlan_get_unicast_addr (self)
878  *
879  *    Retrieves the unicast address from the IrLAN provider. This address
880  *    will be inserted into the devices structure, so the ethernet layer
881  *    can construct its packets.
882  *
883  */
884 static void irlan_get_unicast_addr(struct irlan_cb *self)
885 {
886         struct sk_buff *skb;
887         __u8 *frame;
888
889         IRDA_DEBUG(2, "%s()\n", __func__ );
890
891         IRDA_ASSERT(self != NULL, return;);
892         IRDA_ASSERT(self->magic == IRLAN_MAGIC, return;);
893
894         skb = alloc_skb(IRLAN_MAX_HEADER + IRLAN_CMD_HEADER +
895                         IRLAN_BYTE_PARAMETER_LEN("DATA_CHAN") +
896                         IRLAN_STRING_PARAMETER_LEN("FILTER_TYPE", "DIRECTED") +
897                         IRLAN_STRING_PARAMETER_LEN("FILTER_OPERATION",
898                                                    "DYNAMIC"),
899                         GFP_ATOMIC);
900         if (!skb)
901                 return;
902
903         /* Reserve space for TTP, LMP, and LAP header */
904         skb_reserve(skb, self->client.max_header_size);
905         skb_put(skb, 2);
906
907         frame = skb->data;
908
909         frame[0] = CMD_FILTER_OPERATION;
910         frame[1] = 0x03;                 /* Three parameters */
911         irlan_insert_byte_param(skb, "DATA_CHAN", self->dtsap_sel_data);
912         irlan_insert_string_param(skb, "FILTER_TYPE", "DIRECTED");
913         irlan_insert_string_param(skb, "FILTER_OPERATION", "DYNAMIC");
914
915         irlan_ctrl_data_request(self, skb);
916 }
917
918 /*
919  * Function irlan_get_media_char (self)
920  *
921  *
922  *
923  */
924 void irlan_get_media_char(struct irlan_cb *self)
925 {
926         struct sk_buff *skb;
927         __u8 *frame;
928
929         IRDA_DEBUG(4, "%s()\n", __func__ );
930
931         IRDA_ASSERT(self != NULL, return;);
932         IRDA_ASSERT(self->magic == IRLAN_MAGIC, return;);
933
934         skb = alloc_skb(IRLAN_MAX_HEADER + IRLAN_CMD_HEADER +
935                         IRLAN_STRING_PARAMETER_LEN("MEDIA", "802.3"),
936                         GFP_ATOMIC);
937
938         if (!skb)
939                 return;
940
941         /* Reserve space for TTP, LMP, and LAP header */
942         skb_reserve(skb, self->client.max_header_size);
943         skb_put(skb, 2);
944
945         frame = skb->data;
946
947         /* Build frame */
948         frame[0] = CMD_GET_MEDIA_CHAR;
949         frame[1] = 0x01; /* One parameter */
950
951         irlan_insert_string_param(skb, "MEDIA", "802.3");
952         irlan_ctrl_data_request(self, skb);
953 }
954
955 /*
956  * Function insert_byte_param (skb, param, value)
957  *
958  *    Insert byte parameter into frame
959  *
960  */
961 int irlan_insert_byte_param(struct sk_buff *skb, char *param, __u8 value)
962 {
963         return __irlan_insert_param(skb, param, IRLAN_BYTE, value, 0, NULL, 0);
964 }
965
966 int irlan_insert_short_param(struct sk_buff *skb, char *param, __u16 value)
967 {
968         return __irlan_insert_param(skb, param, IRLAN_SHORT, 0, value, NULL, 0);
969 }
970
971 /*
972  * Function insert_string (skb, param, value)
973  *
974  *    Insert string parameter into frame
975  *
976  */
977 int irlan_insert_string_param(struct sk_buff *skb, char *param, char *string)
978 {
979         int string_len = strlen(string);
980
981         return __irlan_insert_param(skb, param, IRLAN_ARRAY, 0, 0, string,
982                                     string_len);
983 }
984
985 /*
986  * Function insert_array_param(skb, param, value, len_value)
987  *
988  *    Insert array parameter into frame
989  *
990  */
991 int irlan_insert_array_param(struct sk_buff *skb, char *name, __u8 *array,
992                              __u16 array_len)
993 {
994         return __irlan_insert_param(skb, name, IRLAN_ARRAY, 0, 0, array,
995                                     array_len);
996 }
997
998 /*
999  * Function insert_param (skb, param, value, byte)
1000  *
1001  *    Insert parameter at end of buffer, structure of a parameter is:
1002  *
1003  *    -----------------------------------------------------------------------
1004  *    | Name Length[1] | Param Name[1..255] | Val Length[2] | Value[0..1016]|
1005  *    -----------------------------------------------------------------------
1006  */
1007 static int __irlan_insert_param(struct sk_buff *skb, char *param, int type,
1008                                 __u8 value_byte, __u16 value_short,
1009                                 __u8 *value_array, __u16 value_len)
1010 {
1011         __u8 *frame;
1012         __u8 param_len;
1013         __le16 tmp_le; /* Temporary value in little endian format */
1014         int n=0;
1015
1016         if (skb == NULL) {
1017                 IRDA_DEBUG(2, "%s(), Got NULL skb\n", __func__ );
1018                 return 0;
1019         }
1020
1021         param_len = strlen(param);
1022         switch (type) {
1023         case IRLAN_BYTE:
1024                 value_len = 1;
1025                 break;
1026         case IRLAN_SHORT:
1027                 value_len = 2;
1028                 break;
1029         case IRLAN_ARRAY:
1030                 IRDA_ASSERT(value_array != NULL, return 0;);
1031                 IRDA_ASSERT(value_len > 0, return 0;);
1032                 break;
1033         default:
1034                 IRDA_DEBUG(2, "%s(), Unknown parameter type!\n", __func__ );
1035                 return 0;
1036                 break;
1037         }
1038
1039         /* Insert at end of sk-buffer */
1040         frame = skb_tail_pointer(skb);
1041
1042         /* Make space for data */
1043         if (skb_tailroom(skb) < (param_len+value_len+3)) {
1044                 IRDA_DEBUG(2, "%s(), No more space at end of skb\n", __func__ );
1045                 return 0;
1046         }
1047         skb_put(skb, param_len+value_len+3);
1048
1049         /* Insert parameter length */
1050         frame[n++] = param_len;
1051
1052         /* Insert parameter */
1053         memcpy(frame+n, param, param_len); n += param_len;
1054
1055         /* Insert value length (2 byte little endian format, LSB first) */
1056         tmp_le = cpu_to_le16(value_len);
1057         memcpy(frame+n, &tmp_le, 2); n += 2; /* To avoid alignment problems */
1058
1059         /* Insert value */
1060         switch (type) {
1061         case IRLAN_BYTE:
1062                 frame[n++] = value_byte;
1063                 break;
1064         case IRLAN_SHORT:
1065                 tmp_le = cpu_to_le16(value_short);
1066                 memcpy(frame+n, &tmp_le, 2); n += 2;
1067                 break;
1068         case IRLAN_ARRAY:
1069                 memcpy(frame+n, value_array, value_len); n+=value_len;
1070                 break;
1071         default:
1072                 break;
1073         }
1074         IRDA_ASSERT(n == (param_len+value_len+3), return 0;);
1075
1076         return param_len+value_len+3;
1077 }
1078
1079 /*
1080  * Function irlan_extract_param (buf, name, value, len)
1081  *
1082  *    Extracts a single parameter name/value pair from buffer and updates
1083  *    the buffer pointer to point to the next name/value pair.
1084  */
1085 int irlan_extract_param(__u8 *buf, char *name, char *value, __u16 *len)
1086 {
1087         __u8 name_len;
1088         __u16 val_len;
1089         int n=0;
1090
1091         IRDA_DEBUG(4, "%s()\n", __func__ );
1092
1093         /* get length of parameter name (1 byte) */
1094         name_len = buf[n++];
1095
1096         if (name_len > 254) {
1097                 IRDA_DEBUG(2, "%s(), name_len > 254\n", __func__ );
1098                 return -RSP_INVALID_COMMAND_FORMAT;
1099         }
1100
1101         /* get parameter name */
1102         memcpy(name, buf+n, name_len);
1103         name[name_len] = '\0';
1104         n+=name_len;
1105
1106         /*
1107          *  Get length of parameter value (2 bytes in little endian
1108          *  format)
1109          */
1110         memcpy(&val_len, buf+n, 2); /* To avoid alignment problems */
1111         le16_to_cpus(&val_len); n+=2;
1112
1113         if (val_len > 1016) {
1114                 IRDA_DEBUG(2, "%s(), parameter length to long\n", __func__ );
1115                 return -RSP_INVALID_COMMAND_FORMAT;
1116         }
1117         *len = val_len;
1118
1119         /* get parameter value */
1120         memcpy(value, buf+n, val_len);
1121         value[val_len] = '\0';
1122         n+=val_len;
1123
1124         IRDA_DEBUG(4, "Parameter: %s ", name);
1125         IRDA_DEBUG(4, "Value: %s\n", value);
1126
1127         return n;
1128 }
1129
1130 #ifdef CONFIG_PROC_FS
1131
1132 /*
1133  * Start of reading /proc entries.
1134  * Return entry at pos,
1135  *      or start_token to indicate print header line
1136  *      or NULL if end of file
1137  */
1138 static void *irlan_seq_start(struct seq_file *seq, loff_t *pos)
1139 {
1140         int i = 1;
1141         struct irlan_cb *self;
1142
1143         rcu_read_lock();
1144         if (*pos == 0)
1145                 return SEQ_START_TOKEN;
1146
1147         list_for_each_entry(self, &irlans, dev_list) {
1148                 if (*pos == i)
1149                         return self;
1150                 ++i;
1151         }
1152         return NULL;
1153 }
1154
1155 /* Return entry after v, and increment pos */
1156 static void *irlan_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1157 {
1158         struct list_head *nxt;
1159
1160         ++*pos;
1161         if (v == SEQ_START_TOKEN)
1162                 nxt = irlans.next;
1163         else
1164                 nxt = ((struct irlan_cb *)v)->dev_list.next;
1165
1166         return (nxt == &irlans) ? NULL
1167                 : list_entry(nxt, struct irlan_cb, dev_list);
1168 }
1169
1170 /* End of reading /proc file */
1171 static void irlan_seq_stop(struct seq_file *seq, void *v)
1172 {
1173         rcu_read_unlock();
1174 }
1175
1176
1177 /*
1178  * Show one entry in /proc file.
1179  */
1180 static int irlan_seq_show(struct seq_file *seq, void *v)
1181 {
1182         if (v == SEQ_START_TOKEN)
1183                 seq_puts(seq, "IrLAN instances:\n");
1184         else {
1185                 struct irlan_cb *self = v;
1186
1187                 IRDA_ASSERT(self != NULL, return -1;);
1188                 IRDA_ASSERT(self->magic == IRLAN_MAGIC, return -1;);
1189
1190                 seq_printf(seq,"ifname: %s,\n",
1191                                self->dev->name);
1192                 seq_printf(seq,"client state: %s, ",
1193                                irlan_state[ self->client.state]);
1194                 seq_printf(seq,"provider state: %s,\n",
1195                                irlan_state[ self->provider.state]);
1196                 seq_printf(seq,"saddr: %#08x, ",
1197                                self->saddr);
1198                 seq_printf(seq,"daddr: %#08x\n",
1199                                self->daddr);
1200                 seq_printf(seq,"version: %d.%d,\n",
1201                                self->version[1], self->version[0]);
1202                 seq_printf(seq,"access type: %s\n",
1203                                irlan_access[self->client.access_type]);
1204                 seq_printf(seq,"media: %s\n",
1205                                irlan_media[self->media]);
1206
1207                 seq_printf(seq,"local filter:\n");
1208                 seq_printf(seq,"remote filter: ");
1209                 irlan_print_filter(seq, self->client.filter_type);
1210                 seq_printf(seq,"tx busy: %s\n",
1211                                netif_queue_stopped(self->dev) ? "TRUE" : "FALSE");
1212
1213                 seq_putc(seq,'\n');
1214         }
1215         return 0;
1216 }
1217
1218 static const struct seq_operations irlan_seq_ops = {
1219         .start = irlan_seq_start,
1220         .next  = irlan_seq_next,
1221         .stop  = irlan_seq_stop,
1222         .show  = irlan_seq_show,
1223 };
1224
1225 static int irlan_seq_open(struct inode *inode, struct file *file)
1226 {
1227         return seq_open(file, &irlan_seq_ops);
1228 }
1229 #endif
1230
1231 MODULE_AUTHOR("Dag Brattli <dagb@cs.uit.no>");
1232 MODULE_DESCRIPTION("The Linux IrDA LAN protocol");
1233 MODULE_LICENSE("GPL");
1234
1235 module_param(eth, bool, 0);
1236 MODULE_PARM_DESC(eth, "Name devices ethX (0) or irlanX (1)");
1237 module_param(access, int, 0);
1238 MODULE_PARM_DESC(access, "Access type DIRECT=1, PEER=2, HOSTED=3");
1239
1240 module_init(irlan_init);
1241 module_exit(irlan_cleanup);
1242