Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * NET3: Token ring device handling subroutines | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU General Public License | |
6 | * as published by the Free Software Foundation; either version | |
7 | * 2 of the License, or (at your option) any later version. | |
8 | * | |
9 | * Fixes: 3 Feb 97 Paul Norton <pnorton@cts.com> Minor routing fixes. | |
10 | * Added rif table to /proc/net/tr_rif and rif timeout to | |
11 | * /proc/sys/net/token-ring/rif_timeout. | |
12 | * 22 Jun 98 Paul Norton <p.norton@computer.org> Rearranged | |
13 | * tr_header and tr_type_trans to handle passing IPX SNAP and | |
14 | * 802.2 through the correct layers. Eliminated tr_reformat. | |
15 | * | |
16 | */ | |
17 | ||
18 | #include <asm/uaccess.h> | |
19 | #include <asm/system.h> | |
20 | #include <linux/config.h> | |
21 | #include <linux/module.h> | |
22 | #include <linux/types.h> | |
23 | #include <linux/kernel.h> | |
24 | #include <linux/jiffies.h> | |
25 | #include <linux/string.h> | |
26 | #include <linux/mm.h> | |
27 | #include <linux/socket.h> | |
28 | #include <linux/in.h> | |
29 | #include <linux/inet.h> | |
30 | #include <linux/netdevice.h> | |
31 | #include <linux/trdevice.h> | |
32 | #include <linux/skbuff.h> | |
33 | #include <linux/errno.h> | |
34 | #include <linux/timer.h> | |
35 | #include <linux/net.h> | |
36 | #include <linux/proc_fs.h> | |
37 | #include <linux/seq_file.h> | |
38 | #include <linux/init.h> | |
39 | #include <net/arp.h> | |
40 | ||
41 | static void tr_add_rif_info(struct trh_hdr *trh, struct net_device *dev); | |
42 | static void rif_check_expire(unsigned long dummy); | |
43 | ||
44 | #define TR_SR_DEBUG 0 | |
45 | ||
46 | /* | |
47 | * Each RIF entry we learn is kept this way | |
48 | */ | |
49 | ||
c8b35d2a | 50 | struct rif_cache { |
1da177e4 LT |
51 | unsigned char addr[TR_ALEN]; |
52 | int iface; | |
c6b33653 AD |
53 | __be16 rcf; |
54 | __be16 rseg[8]; | |
c8b35d2a | 55 | struct rif_cache *next; |
1da177e4 LT |
56 | unsigned long last_used; |
57 | unsigned char local_ring; | |
58 | }; | |
59 | ||
60 | #define RIF_TABLE_SIZE 32 | |
61 | ||
62 | /* | |
63 | * We hash the RIF cache 32 ways. We do after all have to look it | |
64 | * up a lot. | |
65 | */ | |
66 | ||
c8b35d2a | 67 | static struct rif_cache *rif_table[RIF_TABLE_SIZE]; |
1da177e4 LT |
68 | |
69 | static DEFINE_SPINLOCK(rif_lock); | |
70 | ||
71 | ||
72 | /* | |
73 | * Garbage disposal timer. | |
74 | */ | |
75 | ||
76 | static struct timer_list rif_timer; | |
77 | ||
78 | int sysctl_tr_rif_timeout = 60*10*HZ; | |
79 | ||
80 | static inline unsigned long rif_hash(const unsigned char *addr) | |
81 | { | |
82 | unsigned long x; | |
83 | ||
84 | x = addr[0]; | |
85 | x = (x << 2) ^ addr[1]; | |
86 | x = (x << 2) ^ addr[2]; | |
87 | x = (x << 2) ^ addr[3]; | |
88 | x = (x << 2) ^ addr[4]; | |
89 | x = (x << 2) ^ addr[5]; | |
90 | ||
91 | x ^= x >> 8; | |
92 | ||
93 | return x & (RIF_TABLE_SIZE - 1); | |
94 | } | |
95 | ||
96 | /* | |
97 | * Put the headers on a token ring packet. Token ring source routing | |
98 | * makes this a little more exciting than on ethernet. | |
99 | */ | |
100 | ||
101 | static int tr_header(struct sk_buff *skb, struct net_device *dev, | |
102 | unsigned short type, | |
103 | void *daddr, void *saddr, unsigned len) | |
104 | { | |
105 | struct trh_hdr *trh; | |
106 | int hdr_len; | |
107 | ||
108 | /* | |
109 | * Add the 802.2 SNAP header if IP as the IPv4/IPv6 code calls | |
110 | * dev->hard_header directly. | |
111 | */ | |
112 | if (type == ETH_P_IP || type == ETH_P_IPV6 || type == ETH_P_ARP) | |
113 | { | |
114 | struct trllc *trllc; | |
115 | ||
116 | hdr_len = sizeof(struct trh_hdr) + sizeof(struct trllc); | |
117 | trh = (struct trh_hdr *)skb_push(skb, hdr_len); | |
118 | trllc = (struct trllc *)(trh+1); | |
119 | trllc->dsap = trllc->ssap = EXTENDED_SAP; | |
120 | trllc->llc = UI_CMD; | |
121 | trllc->protid[0] = trllc->protid[1] = trllc->protid[2] = 0x00; | |
122 | trllc->ethertype = htons(type); | |
123 | } | |
124 | else | |
125 | { | |
126 | hdr_len = sizeof(struct trh_hdr); | |
127 | trh = (struct trh_hdr *)skb_push(skb, hdr_len); | |
128 | } | |
129 | ||
130 | trh->ac=AC; | |
131 | trh->fc=LLC_FRAME; | |
132 | ||
133 | if(saddr) | |
134 | memcpy(trh->saddr,saddr,dev->addr_len); | |
135 | else | |
136 | memcpy(trh->saddr,dev->dev_addr,dev->addr_len); | |
137 | ||
138 | /* | |
139 | * Build the destination and then source route the frame | |
140 | */ | |
141 | ||
142 | if(daddr) | |
143 | { | |
144 | memcpy(trh->daddr,daddr,dev->addr_len); | |
145 | tr_source_route(skb,trh,dev); | |
146 | return(hdr_len); | |
147 | } | |
148 | ||
149 | return -hdr_len; | |
150 | } | |
151 | ||
152 | /* | |
153 | * A neighbour discovery of some species (eg arp) has completed. We | |
154 | * can now send the packet. | |
155 | */ | |
156 | ||
157 | static int tr_rebuild_header(struct sk_buff *skb) | |
158 | { | |
159 | struct trh_hdr *trh=(struct trh_hdr *)skb->data; | |
160 | struct trllc *trllc=(struct trllc *)(skb->data+sizeof(struct trh_hdr)); | |
161 | struct net_device *dev = skb->dev; | |
162 | ||
163 | /* | |
164 | * FIXME: We don't yet support IPv6 over token rings | |
165 | */ | |
166 | ||
167 | if(trllc->ethertype != htons(ETH_P_IP)) { | |
168 | printk("tr_rebuild_header: Don't know how to resolve type %04X addresses ?\n",(unsigned int)htons(trllc->ethertype)); | |
169 | return 0; | |
170 | } | |
171 | ||
172 | #ifdef CONFIG_INET | |
173 | if(arp_find(trh->daddr, skb)) { | |
174 | return 1; | |
175 | } | |
176 | else | |
177 | #endif | |
178 | { | |
179 | tr_source_route(skb,trh,dev); | |
180 | return 0; | |
181 | } | |
182 | } | |
183 | ||
184 | /* | |
185 | * Some of this is a bit hackish. We intercept RIF information | |
186 | * used for source routing. We also grab IP directly and don't feed | |
187 | * it via SNAP. | |
188 | */ | |
189 | ||
190 | unsigned short tr_type_trans(struct sk_buff *skb, struct net_device *dev) | |
191 | { | |
192 | ||
193 | struct trh_hdr *trh=(struct trh_hdr *)skb->data; | |
194 | struct trllc *trllc; | |
195 | unsigned riflen=0; | |
196 | ||
197 | skb->mac.raw = skb->data; | |
198 | ||
199 | if(trh->saddr[0] & TR_RII) | |
200 | riflen = (ntohs(trh->rcf) & TR_RCF_LEN_MASK) >> 8; | |
201 | ||
202 | trllc = (struct trllc *)(skb->data+sizeof(struct trh_hdr)-TR_MAXRIFLEN+riflen); | |
203 | ||
204 | skb_pull(skb,sizeof(struct trh_hdr)-TR_MAXRIFLEN+riflen); | |
205 | ||
206 | if(*trh->daddr & 0x80) | |
207 | { | |
208 | if(!memcmp(trh->daddr,dev->broadcast,TR_ALEN)) | |
209 | skb->pkt_type=PACKET_BROADCAST; | |
210 | else | |
211 | skb->pkt_type=PACKET_MULTICAST; | |
212 | } | |
213 | else if ( (trh->daddr[0] & 0x01) && (trh->daddr[1] & 0x00) && (trh->daddr[2] & 0x5E)) | |
214 | { | |
215 | skb->pkt_type=PACKET_MULTICAST; | |
216 | } | |
217 | else if(dev->flags & IFF_PROMISC) | |
218 | { | |
219 | if(memcmp(trh->daddr, dev->dev_addr, TR_ALEN)) | |
220 | skb->pkt_type=PACKET_OTHERHOST; | |
221 | } | |
222 | ||
223 | if ((skb->pkt_type != PACKET_BROADCAST) && | |
224 | (skb->pkt_type != PACKET_MULTICAST)) | |
225 | tr_add_rif_info(trh,dev) ; | |
226 | ||
227 | /* | |
228 | * Strip the SNAP header from ARP packets since we don't | |
229 | * pass them through to the 802.2/SNAP layers. | |
230 | */ | |
231 | ||
232 | if (trllc->dsap == EXTENDED_SAP && | |
233 | (trllc->ethertype == ntohs(ETH_P_IP) || | |
234 | trllc->ethertype == ntohs(ETH_P_IPV6) || | |
235 | trllc->ethertype == ntohs(ETH_P_ARP))) | |
236 | { | |
237 | skb_pull(skb, sizeof(struct trllc)); | |
238 | return trllc->ethertype; | |
239 | } | |
240 | ||
0519d8fb | 241 | return ntohs(ETH_P_TR_802_2); |
1da177e4 LT |
242 | } |
243 | ||
244 | /* | |
245 | * We try to do source routing... | |
246 | */ | |
247 | ||
248 | void tr_source_route(struct sk_buff *skb,struct trh_hdr *trh,struct net_device *dev) | |
249 | { | |
250 | int slack; | |
251 | unsigned int hash; | |
c8b35d2a | 252 | struct rif_cache *entry; |
1da177e4 | 253 | unsigned char *olddata; |
001dd250 | 254 | unsigned long flags; |
1da177e4 LT |
255 | static const unsigned char mcast_func_addr[] |
256 | = {0xC0,0x00,0x00,0x04,0x00,0x00}; | |
257 | ||
001dd250 | 258 | spin_lock_irqsave(&rif_lock, flags); |
1da177e4 LT |
259 | |
260 | /* | |
261 | * Broadcasts are single route as stated in RFC 1042 | |
262 | */ | |
263 | if( (!memcmp(&(trh->daddr[0]),&(dev->broadcast[0]),TR_ALEN)) || | |
264 | (!memcmp(&(trh->daddr[0]),&(mcast_func_addr[0]), TR_ALEN)) ) | |
265 | { | |
266 | trh->rcf=htons((((sizeof(trh->rcf)) << 8) & TR_RCF_LEN_MASK) | |
267 | | TR_RCF_FRAME2K | TR_RCF_LIMITED_BROADCAST); | |
268 | trh->saddr[0]|=TR_RII; | |
269 | } | |
270 | else | |
271 | { | |
272 | hash = rif_hash(trh->daddr); | |
273 | /* | |
274 | * Walk the hash table and look for an entry | |
275 | */ | |
276 | for(entry=rif_table[hash];entry && memcmp(&(entry->addr[0]),&(trh->daddr[0]),TR_ALEN);entry=entry->next); | |
277 | ||
278 | /* | |
279 | * If we found an entry we can route the frame. | |
280 | */ | |
281 | if(entry) | |
282 | { | |
283 | #if TR_SR_DEBUG | |
284 | printk("source routing for %02X:%02X:%02X:%02X:%02X:%02X\n",trh->daddr[0], | |
285 | trh->daddr[1],trh->daddr[2],trh->daddr[3],trh->daddr[4],trh->daddr[5]); | |
286 | #endif | |
287 | if(!entry->local_ring && (ntohs(entry->rcf) & TR_RCF_LEN_MASK) >> 8) | |
288 | { | |
289 | trh->rcf=entry->rcf; | |
290 | memcpy(&trh->rseg[0],&entry->rseg[0],8*sizeof(unsigned short)); | |
291 | trh->rcf^=htons(TR_RCF_DIR_BIT); | |
292 | trh->rcf&=htons(0x1fff); /* Issam Chehab <ichehab@madge1.demon.co.uk> */ | |
293 | ||
294 | trh->saddr[0]|=TR_RII; | |
295 | #if TR_SR_DEBUG | |
296 | printk("entry found with rcf %04x\n", entry->rcf); | |
297 | } | |
298 | else | |
299 | { | |
300 | printk("entry found but without rcf length, local=%02x\n", entry->local_ring); | |
301 | #endif | |
302 | } | |
303 | entry->last_used=jiffies; | |
304 | } | |
305 | else | |
306 | { | |
307 | /* | |
308 | * Without the information we simply have to shout | |
309 | * on the wire. The replies should rapidly clean this | |
310 | * situation up. | |
311 | */ | |
312 | trh->rcf=htons((((sizeof(trh->rcf)) << 8) & TR_RCF_LEN_MASK) | |
313 | | TR_RCF_FRAME2K | TR_RCF_LIMITED_BROADCAST); | |
314 | trh->saddr[0]|=TR_RII; | |
315 | #if TR_SR_DEBUG | |
316 | printk("no entry in rif table found - broadcasting frame\n"); | |
317 | #endif | |
318 | } | |
319 | } | |
320 | ||
321 | /* Compress the RIF here so we don't have to do it in the driver(s) */ | |
322 | if (!(trh->saddr[0] & 0x80)) | |
323 | slack = 18; | |
324 | else | |
325 | slack = 18 - ((ntohs(trh->rcf) & TR_RCF_LEN_MASK)>>8); | |
326 | olddata = skb->data; | |
001dd250 | 327 | spin_unlock_irqrestore(&rif_lock, flags); |
1da177e4 LT |
328 | |
329 | skb_pull(skb, slack); | |
330 | memmove(skb->data, olddata, sizeof(struct trh_hdr) - slack); | |
331 | } | |
332 | ||
333 | /* | |
334 | * We have learned some new RIF information for our source | |
335 | * routing. | |
336 | */ | |
337 | ||
338 | static void tr_add_rif_info(struct trh_hdr *trh, struct net_device *dev) | |
339 | { | |
340 | unsigned int hash, rii_p = 0; | |
001dd250 | 341 | unsigned long flags; |
c8b35d2a | 342 | struct rif_cache *entry; |
5ac660ee | 343 | unsigned char saddr0; |
1da177e4 | 344 | |
001dd250 | 345 | spin_lock_irqsave(&rif_lock, flags); |
5ac660ee | 346 | saddr0 = trh->saddr[0]; |
1da177e4 LT |
347 | |
348 | /* | |
349 | * Firstly see if the entry exists | |
350 | */ | |
351 | ||
352 | if(trh->saddr[0] & TR_RII) | |
353 | { | |
354 | trh->saddr[0]&=0x7f; | |
355 | if (((ntohs(trh->rcf) & TR_RCF_LEN_MASK) >> 8) > 2) | |
356 | { | |
357 | rii_p = 1; | |
358 | } | |
359 | } | |
360 | ||
361 | hash = rif_hash(trh->saddr); | |
362 | for(entry=rif_table[hash];entry && memcmp(&(entry->addr[0]),&(trh->saddr[0]),TR_ALEN);entry=entry->next); | |
363 | ||
364 | if(entry==NULL) | |
365 | { | |
366 | #if TR_SR_DEBUG | |
367 | printk("adding rif_entry: addr:%02X:%02X:%02X:%02X:%02X:%02X rcf:%04X\n", | |
368 | trh->saddr[0],trh->saddr[1],trh->saddr[2], | |
369 | trh->saddr[3],trh->saddr[4],trh->saddr[5], | |
370 | ntohs(trh->rcf)); | |
371 | #endif | |
372 | /* | |
373 | * Allocate our new entry. A failure to allocate loses | |
374 | * use the information. This is harmless. | |
375 | * | |
376 | * FIXME: We ought to keep some kind of cache size | |
377 | * limiting and adjust the timers to suit. | |
378 | */ | |
c8b35d2a | 379 | entry=kmalloc(sizeof(struct rif_cache),GFP_ATOMIC); |
1da177e4 LT |
380 | |
381 | if(!entry) | |
382 | { | |
383 | printk(KERN_DEBUG "tr.c: Couldn't malloc rif cache entry !\n"); | |
001dd250 | 384 | spin_unlock_irqrestore(&rif_lock, flags); |
1da177e4 LT |
385 | return; |
386 | } | |
387 | ||
388 | memcpy(&(entry->addr[0]),&(trh->saddr[0]),TR_ALEN); | |
389 | entry->iface = dev->ifindex; | |
390 | entry->next=rif_table[hash]; | |
391 | entry->last_used=jiffies; | |
392 | rif_table[hash]=entry; | |
393 | ||
394 | if (rii_p) | |
395 | { | |
396 | entry->rcf = trh->rcf & htons((unsigned short)~TR_RCF_BROADCAST_MASK); | |
397 | memcpy(&(entry->rseg[0]),&(trh->rseg[0]),8*sizeof(unsigned short)); | |
398 | entry->local_ring = 0; | |
1da177e4 LT |
399 | } |
400 | else | |
401 | { | |
402 | entry->local_ring = 1; | |
403 | } | |
404 | } | |
405 | else /* Y. Tahara added */ | |
406 | { | |
407 | /* | |
408 | * Update existing entries | |
409 | */ | |
410 | if (!entry->local_ring) | |
411 | if (entry->rcf != (trh->rcf & htons((unsigned short)~TR_RCF_BROADCAST_MASK)) && | |
412 | !(trh->rcf & htons(TR_RCF_BROADCAST_MASK))) | |
413 | { | |
414 | #if TR_SR_DEBUG | |
415 | printk("updating rif_entry: addr:%02X:%02X:%02X:%02X:%02X:%02X rcf:%04X\n", | |
416 | trh->saddr[0],trh->saddr[1],trh->saddr[2], | |
417 | trh->saddr[3],trh->saddr[4],trh->saddr[5], | |
418 | ntohs(trh->rcf)); | |
419 | #endif | |
420 | entry->rcf = trh->rcf & htons((unsigned short)~TR_RCF_BROADCAST_MASK); | |
421 | memcpy(&(entry->rseg[0]),&(trh->rseg[0]),8*sizeof(unsigned short)); | |
422 | } | |
423 | entry->last_used=jiffies; | |
424 | } | |
5ac660ee | 425 | trh->saddr[0]=saddr0; /* put the routing indicator back for tcpdump */ |
001dd250 | 426 | spin_unlock_irqrestore(&rif_lock, flags); |
1da177e4 LT |
427 | } |
428 | ||
429 | /* | |
430 | * Scan the cache with a timer and see what we need to throw out. | |
431 | */ | |
432 | ||
433 | static void rif_check_expire(unsigned long dummy) | |
434 | { | |
435 | int i; | |
001dd250 | 436 | unsigned long flags, next_interval = jiffies + sysctl_tr_rif_timeout/2; |
1da177e4 | 437 | |
001dd250 | 438 | spin_lock_irqsave(&rif_lock, flags); |
1da177e4 LT |
439 | |
440 | for(i =0; i < RIF_TABLE_SIZE; i++) { | |
c8b35d2a | 441 | struct rif_cache *entry, **pentry; |
1da177e4 LT |
442 | |
443 | pentry = rif_table+i; | |
444 | while((entry=*pentry) != NULL) { | |
445 | unsigned long expires | |
446 | = entry->last_used + sysctl_tr_rif_timeout; | |
447 | ||
448 | if (time_before_eq(expires, jiffies)) { | |
449 | *pentry = entry->next; | |
450 | kfree(entry); | |
451 | } else { | |
452 | pentry = &entry->next; | |
453 | ||
454 | if (time_before(expires, next_interval)) | |
455 | next_interval = expires; | |
456 | } | |
457 | } | |
458 | } | |
459 | ||
001dd250 | 460 | spin_unlock_irqrestore(&rif_lock, flags); |
1da177e4 LT |
461 | |
462 | mod_timer(&rif_timer, next_interval); | |
463 | ||
464 | } | |
465 | ||
466 | /* | |
467 | * Generate the /proc/net information for the token ring RIF | |
468 | * routing. | |
469 | */ | |
470 | ||
471 | #ifdef CONFIG_PROC_FS | |
472 | ||
c8b35d2a | 473 | static struct rif_cache *rif_get_idx(loff_t pos) |
1da177e4 LT |
474 | { |
475 | int i; | |
c8b35d2a | 476 | struct rif_cache *entry; |
1da177e4 LT |
477 | loff_t off = 0; |
478 | ||
479 | for(i = 0; i < RIF_TABLE_SIZE; i++) | |
480 | for(entry = rif_table[i]; entry; entry = entry->next) { | |
481 | if (off == pos) | |
482 | return entry; | |
483 | ++off; | |
484 | } | |
485 | ||
486 | return NULL; | |
487 | } | |
488 | ||
489 | static void *rif_seq_start(struct seq_file *seq, loff_t *pos) | |
490 | { | |
001dd250 | 491 | spin_lock_irq(&rif_lock); |
1da177e4 LT |
492 | |
493 | return *pos ? rif_get_idx(*pos - 1) : SEQ_START_TOKEN; | |
494 | } | |
495 | ||
496 | static void *rif_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
497 | { | |
498 | int i; | |
c8b35d2a | 499 | struct rif_cache *ent = v; |
1da177e4 LT |
500 | |
501 | ++*pos; | |
502 | ||
503 | if (v == SEQ_START_TOKEN) { | |
504 | i = -1; | |
505 | goto scan; | |
506 | } | |
507 | ||
508 | if (ent->next) | |
509 | return ent->next; | |
510 | ||
511 | i = rif_hash(ent->addr); | |
512 | scan: | |
513 | while (++i < RIF_TABLE_SIZE) { | |
514 | if ((ent = rif_table[i]) != NULL) | |
515 | return ent; | |
516 | } | |
517 | return NULL; | |
518 | } | |
519 | ||
520 | static void rif_seq_stop(struct seq_file *seq, void *v) | |
521 | { | |
001dd250 | 522 | spin_unlock_irq(&rif_lock); |
1da177e4 LT |
523 | } |
524 | ||
525 | static int rif_seq_show(struct seq_file *seq, void *v) | |
526 | { | |
527 | int j, rcf_len, segment, brdgnmb; | |
c8b35d2a | 528 | struct rif_cache *entry = v; |
1da177e4 LT |
529 | |
530 | if (v == SEQ_START_TOKEN) | |
531 | seq_puts(seq, | |
532 | "if TR address TTL rcf routing segments\n"); | |
533 | else { | |
534 | struct net_device *dev = dev_get_by_index(entry->iface); | |
535 | long ttl = (long) (entry->last_used + sysctl_tr_rif_timeout) | |
536 | - (long) jiffies; | |
537 | ||
538 | seq_printf(seq, "%s %02X:%02X:%02X:%02X:%02X:%02X %7li ", | |
539 | dev?dev->name:"?", | |
540 | entry->addr[0],entry->addr[1],entry->addr[2], | |
541 | entry->addr[3],entry->addr[4],entry->addr[5], | |
542 | ttl/HZ); | |
543 | ||
544 | if (entry->local_ring) | |
545 | seq_puts(seq, "local\n"); | |
546 | else { | |
547 | ||
548 | seq_printf(seq, "%04X", ntohs(entry->rcf)); | |
549 | rcf_len = ((ntohs(entry->rcf) & TR_RCF_LEN_MASK)>>8)-2; | |
550 | if (rcf_len) | |
551 | rcf_len >>= 1; | |
552 | for(j = 1; j < rcf_len; j++) { | |
553 | if(j==1) { | |
554 | segment=ntohs(entry->rseg[j-1])>>4; | |
555 | seq_printf(seq," %03X",segment); | |
556 | }; | |
557 | segment=ntohs(entry->rseg[j])>>4; | |
558 | brdgnmb=ntohs(entry->rseg[j-1])&0x00f; | |
559 | seq_printf(seq,"-%01X-%03X",brdgnmb,segment); | |
560 | } | |
561 | seq_putc(seq, '\n'); | |
562 | } | |
563 | } | |
564 | return 0; | |
565 | } | |
566 | ||
567 | ||
568 | static struct seq_operations rif_seq_ops = { | |
569 | .start = rif_seq_start, | |
570 | .next = rif_seq_next, | |
571 | .stop = rif_seq_stop, | |
572 | .show = rif_seq_show, | |
573 | }; | |
574 | ||
575 | static int rif_seq_open(struct inode *inode, struct file *file) | |
576 | { | |
577 | return seq_open(file, &rif_seq_ops); | |
578 | } | |
579 | ||
580 | static struct file_operations rif_seq_fops = { | |
581 | .owner = THIS_MODULE, | |
582 | .open = rif_seq_open, | |
583 | .read = seq_read, | |
584 | .llseek = seq_lseek, | |
585 | .release = seq_release, | |
586 | }; | |
587 | ||
588 | #endif | |
589 | ||
590 | static void tr_setup(struct net_device *dev) | |
591 | { | |
592 | /* | |
593 | * Configure and register | |
594 | */ | |
595 | ||
596 | dev->hard_header = tr_header; | |
597 | dev->rebuild_header = tr_rebuild_header; | |
598 | ||
599 | dev->type = ARPHRD_IEEE802_TR; | |
600 | dev->hard_header_len = TR_HLEN; | |
601 | dev->mtu = 2000; | |
602 | dev->addr_len = TR_ALEN; | |
603 | dev->tx_queue_len = 100; /* Long queues on tr */ | |
604 | ||
605 | memset(dev->broadcast,0xFF, TR_ALEN); | |
606 | ||
607 | /* New-style flags. */ | |
608 | dev->flags = IFF_BROADCAST | IFF_MULTICAST ; | |
609 | } | |
610 | ||
611 | /** | |
612 | * alloc_trdev - Register token ring device | |
613 | * @sizeof_priv: Size of additional driver-private structure to be allocated | |
614 | * for this token ring device | |
615 | * | |
616 | * Fill in the fields of the device structure with token ring-generic values. | |
617 | * | |
618 | * Constructs a new net device, complete with a private data area of | |
619 | * size @sizeof_priv. A 32-byte (not bit) alignment is enforced for | |
620 | * this private data area. | |
621 | */ | |
622 | struct net_device *alloc_trdev(int sizeof_priv) | |
623 | { | |
624 | return alloc_netdev(sizeof_priv, "tr%d", tr_setup); | |
625 | } | |
626 | ||
627 | /* | |
628 | * Called during bootup. We don't actually have to initialise | |
629 | * too much for this. | |
630 | */ | |
631 | ||
632 | static int __init rif_init(void) | |
633 | { | |
634 | init_timer(&rif_timer); | |
635 | rif_timer.expires = sysctl_tr_rif_timeout; | |
636 | rif_timer.data = 0L; | |
637 | rif_timer.function = rif_check_expire; | |
638 | add_timer(&rif_timer); | |
639 | ||
640 | proc_net_fops_create("tr_rif", S_IRUGO, &rif_seq_fops); | |
641 | return 0; | |
642 | } | |
643 | ||
644 | module_init(rif_init); | |
645 | ||
646 | EXPORT_SYMBOL(tr_source_route); | |
647 | EXPORT_SYMBOL(tr_type_trans); | |
648 | EXPORT_SYMBOL(alloc_trdev); |