Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Generic HDLC support routines for Linux | |
3 | * Frame Relay support | |
4 | * | |
b3dd65f9 | 5 | * Copyright (C) 1999 - 2005 Krzysztof Halasa <khc@pm.waw.pl> |
1da177e4 LT |
6 | * |
7 | * This program is free software; you can redistribute it and/or modify it | |
8 | * under the terms of version 2 of the GNU General Public License | |
9 | * as published by the Free Software Foundation. | |
10 | * | |
11 | ||
12 | Theory of PVC state | |
13 | ||
14 | DCE mode: | |
15 | ||
16 | (exist,new) -> 0,0 when "PVC create" or if "link unreliable" | |
17 | 0,x -> 1,1 if "link reliable" when sending FULL STATUS | |
18 | 1,1 -> 1,0 if received FULL STATUS ACK | |
19 | ||
20 | (active) -> 0 when "ifconfig PVC down" or "link unreliable" or "PVC create" | |
21 | -> 1 when "PVC up" and (exist,new) = 1,0 | |
22 | ||
23 | DTE mode: | |
24 | (exist,new,active) = FULL STATUS if "link reliable" | |
25 | = 0, 0, 0 if "link unreliable" | |
26 | No LMI: | |
27 | active = open and "link reliable" | |
28 | exist = new = not used | |
29 | ||
b3dd65f9 KH |
30 | CCITT LMI: ITU-T Q.933 Annex A |
31 | ANSI LMI: ANSI T1.617 Annex D | |
32 | CISCO LMI: the original, aka "Gang of Four" LMI | |
33 | ||
1da177e4 LT |
34 | */ |
35 | ||
36 | #include <linux/module.h> | |
37 | #include <linux/kernel.h> | |
38 | #include <linux/slab.h> | |
39 | #include <linux/poll.h> | |
40 | #include <linux/errno.h> | |
41 | #include <linux/if_arp.h> | |
42 | #include <linux/init.h> | |
43 | #include <linux/skbuff.h> | |
44 | #include <linux/pkt_sched.h> | |
45 | #include <linux/random.h> | |
46 | #include <linux/inetdevice.h> | |
47 | #include <linux/lapb.h> | |
48 | #include <linux/rtnetlink.h> | |
49 | #include <linux/etherdevice.h> | |
50 | #include <linux/hdlc.h> | |
51 | ||
52 | #undef DEBUG_PKT | |
53 | #undef DEBUG_ECN | |
54 | #undef DEBUG_LINK | |
55 | ||
b3dd65f9 KH |
56 | #define FR_UI 0x03 |
57 | #define FR_PAD 0x00 | |
58 | ||
59 | #define NLPID_IP 0xCC | |
60 | #define NLPID_IPV6 0x8E | |
61 | #define NLPID_SNAP 0x80 | |
62 | #define NLPID_PAD 0x00 | |
63 | #define NLPID_CCITT_ANSI_LMI 0x08 | |
64 | #define NLPID_CISCO_LMI 0x09 | |
65 | ||
66 | ||
67 | #define LMI_CCITT_ANSI_DLCI 0 /* LMI DLCI */ | |
68 | #define LMI_CISCO_DLCI 1023 | |
69 | ||
70 | #define LMI_CALLREF 0x00 /* Call Reference */ | |
71 | #define LMI_ANSI_LOCKSHIFT 0x95 /* ANSI locking shift */ | |
72 | #define LMI_ANSI_CISCO_REPTYPE 0x01 /* report type */ | |
73 | #define LMI_CCITT_REPTYPE 0x51 | |
74 | #define LMI_ANSI_CISCO_ALIVE 0x03 /* keep alive */ | |
75 | #define LMI_CCITT_ALIVE 0x53 | |
76 | #define LMI_ANSI_CISCO_PVCSTAT 0x07 /* PVC status */ | |
77 | #define LMI_CCITT_PVCSTAT 0x57 | |
78 | ||
79 | #define LMI_FULLREP 0x00 /* full report */ | |
80 | #define LMI_INTEGRITY 0x01 /* link integrity report */ | |
81 | #define LMI_SINGLE 0x02 /* single PVC report */ | |
82 | ||
1da177e4 LT |
83 | #define LMI_STATUS_ENQUIRY 0x75 |
84 | #define LMI_STATUS 0x7D /* reply */ | |
85 | ||
86 | #define LMI_REPT_LEN 1 /* report type element length */ | |
87 | #define LMI_INTEG_LEN 2 /* link integrity element length */ | |
88 | ||
b3dd65f9 KH |
89 | #define LMI_CCITT_CISCO_LENGTH 13 /* LMI frame lengths */ |
90 | #define LMI_ANSI_LENGTH 14 | |
1da177e4 LT |
91 | |
92 | ||
93 | typedef struct { | |
94 | #if defined(__LITTLE_ENDIAN_BITFIELD) | |
95 | unsigned ea1: 1; | |
96 | unsigned cr: 1; | |
97 | unsigned dlcih: 6; | |
98 | ||
99 | unsigned ea2: 1; | |
100 | unsigned de: 1; | |
101 | unsigned becn: 1; | |
102 | unsigned fecn: 1; | |
103 | unsigned dlcil: 4; | |
104 | #else | |
105 | unsigned dlcih: 6; | |
106 | unsigned cr: 1; | |
107 | unsigned ea1: 1; | |
108 | ||
109 | unsigned dlcil: 4; | |
110 | unsigned fecn: 1; | |
111 | unsigned becn: 1; | |
112 | unsigned de: 1; | |
113 | unsigned ea2: 1; | |
114 | #endif | |
115 | }__attribute__ ((packed)) fr_hdr; | |
116 | ||
117 | ||
118 | static inline u16 q922_to_dlci(u8 *hdr) | |
119 | { | |
120 | return ((hdr[0] & 0xFC) << 2) | ((hdr[1] & 0xF0) >> 4); | |
121 | } | |
122 | ||
123 | ||
124 | ||
125 | static inline void dlci_to_q922(u8 *hdr, u16 dlci) | |
126 | { | |
127 | hdr[0] = (dlci >> 2) & 0xFC; | |
128 | hdr[1] = ((dlci << 4) & 0xF0) | 0x01; | |
129 | } | |
130 | ||
131 | ||
132 | ||
133 | static inline pvc_device* find_pvc(hdlc_device *hdlc, u16 dlci) | |
134 | { | |
135 | pvc_device *pvc = hdlc->state.fr.first_pvc; | |
136 | ||
137 | while (pvc) { | |
138 | if (pvc->dlci == dlci) | |
139 | return pvc; | |
140 | if (pvc->dlci > dlci) | |
141 | return NULL; /* the listed is sorted */ | |
142 | pvc = pvc->next; | |
143 | } | |
144 | ||
145 | return NULL; | |
146 | } | |
147 | ||
148 | ||
149 | static inline pvc_device* add_pvc(struct net_device *dev, u16 dlci) | |
150 | { | |
151 | hdlc_device *hdlc = dev_to_hdlc(dev); | |
152 | pvc_device *pvc, **pvc_p = &hdlc->state.fr.first_pvc; | |
153 | ||
154 | while (*pvc_p) { | |
155 | if ((*pvc_p)->dlci == dlci) | |
156 | return *pvc_p; | |
157 | if ((*pvc_p)->dlci > dlci) | |
158 | break; /* the list is sorted */ | |
159 | pvc_p = &(*pvc_p)->next; | |
160 | } | |
161 | ||
162 | pvc = kmalloc(sizeof(pvc_device), GFP_ATOMIC); | |
163 | if (!pvc) | |
164 | return NULL; | |
165 | ||
166 | memset(pvc, 0, sizeof(pvc_device)); | |
167 | pvc->dlci = dlci; | |
168 | pvc->master = dev; | |
169 | pvc->next = *pvc_p; /* Put it in the chain */ | |
170 | *pvc_p = pvc; | |
171 | return pvc; | |
172 | } | |
173 | ||
174 | ||
175 | static inline int pvc_is_used(pvc_device *pvc) | |
176 | { | |
177 | return pvc->main != NULL || pvc->ether != NULL; | |
178 | } | |
179 | ||
180 | ||
181 | static inline void pvc_carrier(int on, pvc_device *pvc) | |
182 | { | |
183 | if (on) { | |
184 | if (pvc->main) | |
185 | if (!netif_carrier_ok(pvc->main)) | |
186 | netif_carrier_on(pvc->main); | |
187 | if (pvc->ether) | |
188 | if (!netif_carrier_ok(pvc->ether)) | |
189 | netif_carrier_on(pvc->ether); | |
190 | } else { | |
191 | if (pvc->main) | |
192 | if (netif_carrier_ok(pvc->main)) | |
193 | netif_carrier_off(pvc->main); | |
194 | if (pvc->ether) | |
195 | if (netif_carrier_ok(pvc->ether)) | |
196 | netif_carrier_off(pvc->ether); | |
197 | } | |
198 | } | |
199 | ||
200 | ||
201 | static inline void delete_unused_pvcs(hdlc_device *hdlc) | |
202 | { | |
203 | pvc_device **pvc_p = &hdlc->state.fr.first_pvc; | |
204 | ||
205 | while (*pvc_p) { | |
206 | if (!pvc_is_used(*pvc_p)) { | |
207 | pvc_device *pvc = *pvc_p; | |
208 | *pvc_p = pvc->next; | |
209 | kfree(pvc); | |
210 | continue; | |
211 | } | |
212 | pvc_p = &(*pvc_p)->next; | |
213 | } | |
214 | } | |
215 | ||
216 | ||
217 | static inline struct net_device** get_dev_p(pvc_device *pvc, int type) | |
218 | { | |
219 | if (type == ARPHRD_ETHER) | |
220 | return &pvc->ether; | |
221 | else | |
222 | return &pvc->main; | |
223 | } | |
224 | ||
225 | ||
1da177e4 LT |
226 | static int fr_hard_header(struct sk_buff **skb_p, u16 dlci) |
227 | { | |
228 | u16 head_len; | |
229 | struct sk_buff *skb = *skb_p; | |
230 | ||
231 | switch (skb->protocol) { | |
b3dd65f9 | 232 | case __constant_ntohs(NLPID_CCITT_ANSI_LMI): |
1da177e4 LT |
233 | head_len = 4; |
234 | skb_push(skb, head_len); | |
b3dd65f9 | 235 | skb->data[3] = NLPID_CCITT_ANSI_LMI; |
1da177e4 LT |
236 | break; |
237 | ||
b3dd65f9 | 238 | case __constant_ntohs(NLPID_CISCO_LMI): |
1da177e4 LT |
239 | head_len = 4; |
240 | skb_push(skb, head_len); | |
b3dd65f9 | 241 | skb->data[3] = NLPID_CISCO_LMI; |
1da177e4 LT |
242 | break; |
243 | ||
b3dd65f9 KH |
244 | case __constant_ntohs(ETH_P_IP): |
245 | head_len = 4; | |
246 | skb_push(skb, head_len); | |
247 | skb->data[3] = NLPID_IP; | |
248 | break; | |
249 | ||
250 | case __constant_ntohs(ETH_P_IPV6): | |
1da177e4 LT |
251 | head_len = 4; |
252 | skb_push(skb, head_len); | |
b3dd65f9 | 253 | skb->data[3] = NLPID_IPV6; |
1da177e4 LT |
254 | break; |
255 | ||
256 | case __constant_ntohs(ETH_P_802_3): | |
257 | head_len = 10; | |
258 | if (skb_headroom(skb) < head_len) { | |
259 | struct sk_buff *skb2 = skb_realloc_headroom(skb, | |
260 | head_len); | |
261 | if (!skb2) | |
262 | return -ENOBUFS; | |
263 | dev_kfree_skb(skb); | |
264 | skb = *skb_p = skb2; | |
265 | } | |
266 | skb_push(skb, head_len); | |
267 | skb->data[3] = FR_PAD; | |
268 | skb->data[4] = NLPID_SNAP; | |
269 | skb->data[5] = FR_PAD; | |
270 | skb->data[6] = 0x80; | |
271 | skb->data[7] = 0xC2; | |
272 | skb->data[8] = 0x00; | |
273 | skb->data[9] = 0x07; /* bridged Ethernet frame w/out FCS */ | |
274 | break; | |
275 | ||
276 | default: | |
277 | head_len = 10; | |
278 | skb_push(skb, head_len); | |
279 | skb->data[3] = FR_PAD; | |
280 | skb->data[4] = NLPID_SNAP; | |
281 | skb->data[5] = FR_PAD; | |
282 | skb->data[6] = FR_PAD; | |
283 | skb->data[7] = FR_PAD; | |
284 | *(u16*)(skb->data + 8) = skb->protocol; | |
285 | } | |
286 | ||
287 | dlci_to_q922(skb->data, dlci); | |
288 | skb->data[2] = FR_UI; | |
289 | return 0; | |
290 | } | |
291 | ||
292 | ||
293 | ||
294 | static int pvc_open(struct net_device *dev) | |
295 | { | |
296 | pvc_device *pvc = dev_to_pvc(dev); | |
297 | ||
298 | if ((pvc->master->flags & IFF_UP) == 0) | |
299 | return -EIO; /* Master must be UP in order to activate PVC */ | |
300 | ||
301 | if (pvc->open_count++ == 0) { | |
302 | hdlc_device *hdlc = dev_to_hdlc(pvc->master); | |
303 | if (hdlc->state.fr.settings.lmi == LMI_NONE) | |
304 | pvc->state.active = hdlc->carrier; | |
305 | ||
306 | pvc_carrier(pvc->state.active, pvc); | |
307 | hdlc->state.fr.dce_changed = 1; | |
308 | } | |
309 | return 0; | |
310 | } | |
311 | ||
312 | ||
313 | ||
314 | static int pvc_close(struct net_device *dev) | |
315 | { | |
316 | pvc_device *pvc = dev_to_pvc(dev); | |
317 | ||
318 | if (--pvc->open_count == 0) { | |
319 | hdlc_device *hdlc = dev_to_hdlc(pvc->master); | |
320 | if (hdlc->state.fr.settings.lmi == LMI_NONE) | |
321 | pvc->state.active = 0; | |
322 | ||
323 | if (hdlc->state.fr.settings.dce) { | |
324 | hdlc->state.fr.dce_changed = 1; | |
325 | pvc->state.active = 0; | |
326 | } | |
327 | } | |
328 | return 0; | |
329 | } | |
330 | ||
331 | ||
332 | ||
7665a089 | 333 | static int pvc_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) |
1da177e4 LT |
334 | { |
335 | pvc_device *pvc = dev_to_pvc(dev); | |
336 | fr_proto_pvc_info info; | |
337 | ||
338 | if (ifr->ifr_settings.type == IF_GET_PROTO) { | |
339 | if (dev->type == ARPHRD_ETHER) | |
340 | ifr->ifr_settings.type = IF_PROTO_FR_ETH_PVC; | |
341 | else | |
342 | ifr->ifr_settings.type = IF_PROTO_FR_PVC; | |
343 | ||
344 | if (ifr->ifr_settings.size < sizeof(info)) { | |
345 | /* data size wanted */ | |
346 | ifr->ifr_settings.size = sizeof(info); | |
347 | return -ENOBUFS; | |
348 | } | |
349 | ||
350 | info.dlci = pvc->dlci; | |
351 | memcpy(info.master, pvc->master->name, IFNAMSIZ); | |
352 | if (copy_to_user(ifr->ifr_settings.ifs_ifsu.fr_pvc_info, | |
353 | &info, sizeof(info))) | |
354 | return -EFAULT; | |
355 | return 0; | |
356 | } | |
357 | ||
358 | return -EINVAL; | |
359 | } | |
360 | ||
361 | ||
362 | static inline struct net_device_stats *pvc_get_stats(struct net_device *dev) | |
363 | { | |
364 | return netdev_priv(dev); | |
365 | } | |
366 | ||
367 | ||
368 | ||
369 | static int pvc_xmit(struct sk_buff *skb, struct net_device *dev) | |
370 | { | |
371 | pvc_device *pvc = dev_to_pvc(dev); | |
372 | struct net_device_stats *stats = pvc_get_stats(dev); | |
373 | ||
374 | if (pvc->state.active) { | |
375 | if (dev->type == ARPHRD_ETHER) { | |
376 | int pad = ETH_ZLEN - skb->len; | |
377 | if (pad > 0) { /* Pad the frame with zeros */ | |
378 | int len = skb->len; | |
379 | if (skb_tailroom(skb) < pad) | |
380 | if (pskb_expand_head(skb, 0, pad, | |
381 | GFP_ATOMIC)) { | |
382 | stats->tx_dropped++; | |
383 | dev_kfree_skb(skb); | |
384 | return 0; | |
385 | } | |
386 | skb_put(skb, pad); | |
387 | memset(skb->data + len, 0, pad); | |
388 | } | |
389 | skb->protocol = __constant_htons(ETH_P_802_3); | |
390 | } | |
391 | if (!fr_hard_header(&skb, pvc->dlci)) { | |
392 | stats->tx_bytes += skb->len; | |
393 | stats->tx_packets++; | |
394 | if (pvc->state.fecn) /* TX Congestion counter */ | |
395 | stats->tx_compressed++; | |
396 | skb->dev = pvc->master; | |
397 | dev_queue_xmit(skb); | |
398 | return 0; | |
399 | } | |
400 | } | |
401 | ||
402 | stats->tx_dropped++; | |
403 | dev_kfree_skb(skb); | |
404 | return 0; | |
405 | } | |
406 | ||
407 | ||
408 | ||
409 | static int pvc_change_mtu(struct net_device *dev, int new_mtu) | |
410 | { | |
411 | if ((new_mtu < 68) || (new_mtu > HDLC_MAX_MTU)) | |
412 | return -EINVAL; | |
413 | dev->mtu = new_mtu; | |
414 | return 0; | |
415 | } | |
416 | ||
417 | ||
418 | ||
419 | static inline void fr_log_dlci_active(pvc_device *pvc) | |
420 | { | |
421 | printk(KERN_INFO "%s: DLCI %d [%s%s%s]%s %s\n", | |
422 | pvc->master->name, | |
423 | pvc->dlci, | |
424 | pvc->main ? pvc->main->name : "", | |
425 | pvc->main && pvc->ether ? " " : "", | |
426 | pvc->ether ? pvc->ether->name : "", | |
427 | pvc->state.new ? " new" : "", | |
428 | !pvc->state.exist ? "deleted" : | |
429 | pvc->state.active ? "active" : "inactive"); | |
430 | } | |
431 | ||
432 | ||
433 | ||
434 | static inline u8 fr_lmi_nextseq(u8 x) | |
435 | { | |
436 | x++; | |
437 | return x ? x : 1; | |
438 | } | |
439 | ||
440 | ||
441 | ||
442 | static void fr_lmi_send(struct net_device *dev, int fullrep) | |
443 | { | |
444 | hdlc_device *hdlc = dev_to_hdlc(dev); | |
445 | struct sk_buff *skb; | |
446 | pvc_device *pvc = hdlc->state.fr.first_pvc; | |
b3dd65f9 KH |
447 | int lmi = hdlc->state.fr.settings.lmi; |
448 | int dce = hdlc->state.fr.settings.dce; | |
449 | int len = lmi == LMI_ANSI ? LMI_ANSI_LENGTH : LMI_CCITT_CISCO_LENGTH; | |
450 | int stat_len = (lmi == LMI_CISCO) ? 6 : 3; | |
1da177e4 LT |
451 | u8 *data; |
452 | int i = 0; | |
453 | ||
b3dd65f9 | 454 | if (dce && fullrep) { |
1da177e4 LT |
455 | len += hdlc->state.fr.dce_pvc_count * (2 + stat_len); |
456 | if (len > HDLC_MAX_MRU) { | |
457 | printk(KERN_WARNING "%s: Too many PVCs while sending " | |
458 | "LMI full report\n", dev->name); | |
459 | return; | |
460 | } | |
461 | } | |
462 | ||
463 | skb = dev_alloc_skb(len); | |
464 | if (!skb) { | |
465 | printk(KERN_WARNING "%s: Memory squeeze on fr_lmi_send()\n", | |
466 | dev->name); | |
467 | return; | |
468 | } | |
469 | memset(skb->data, 0, len); | |
470 | skb_reserve(skb, 4); | |
b3dd65f9 KH |
471 | if (lmi == LMI_CISCO) { |
472 | skb->protocol = __constant_htons(NLPID_CISCO_LMI); | |
473 | fr_hard_header(&skb, LMI_CISCO_DLCI); | |
474 | } else { | |
475 | skb->protocol = __constant_htons(NLPID_CCITT_ANSI_LMI); | |
476 | fr_hard_header(&skb, LMI_CCITT_ANSI_DLCI); | |
477 | } | |
1da177e4 LT |
478 | data = skb->tail; |
479 | data[i++] = LMI_CALLREF; | |
b3dd65f9 KH |
480 | data[i++] = dce ? LMI_STATUS : LMI_STATUS_ENQUIRY; |
481 | if (lmi == LMI_ANSI) | |
1da177e4 | 482 | data[i++] = LMI_ANSI_LOCKSHIFT; |
b3dd65f9 KH |
483 | data[i++] = lmi == LMI_CCITT ? LMI_CCITT_REPTYPE : |
484 | LMI_ANSI_CISCO_REPTYPE; | |
1da177e4 LT |
485 | data[i++] = LMI_REPT_LEN; |
486 | data[i++] = fullrep ? LMI_FULLREP : LMI_INTEGRITY; | |
b3dd65f9 | 487 | data[i++] = lmi == LMI_CCITT ? LMI_CCITT_ALIVE : LMI_ANSI_CISCO_ALIVE; |
1da177e4 LT |
488 | data[i++] = LMI_INTEG_LEN; |
489 | data[i++] = hdlc->state.fr.txseq =fr_lmi_nextseq(hdlc->state.fr.txseq); | |
490 | data[i++] = hdlc->state.fr.rxseq; | |
491 | ||
b3dd65f9 | 492 | if (dce && fullrep) { |
1da177e4 | 493 | while (pvc) { |
b3dd65f9 KH |
494 | data[i++] = lmi == LMI_CCITT ? LMI_CCITT_PVCSTAT : |
495 | LMI_ANSI_CISCO_PVCSTAT; | |
1da177e4 LT |
496 | data[i++] = stat_len; |
497 | ||
498 | /* LMI start/restart */ | |
499 | if (hdlc->state.fr.reliable && !pvc->state.exist) { | |
500 | pvc->state.exist = pvc->state.new = 1; | |
501 | fr_log_dlci_active(pvc); | |
502 | } | |
503 | ||
504 | /* ifconfig PVC up */ | |
505 | if (pvc->open_count && !pvc->state.active && | |
506 | pvc->state.exist && !pvc->state.new) { | |
507 | pvc_carrier(1, pvc); | |
508 | pvc->state.active = 1; | |
509 | fr_log_dlci_active(pvc); | |
510 | } | |
511 | ||
b3dd65f9 KH |
512 | if (lmi == LMI_CISCO) { |
513 | data[i] = pvc->dlci >> 8; | |
514 | data[i + 1] = pvc->dlci & 0xFF; | |
515 | } else { | |
516 | data[i] = (pvc->dlci >> 4) & 0x3F; | |
517 | data[i + 1] = ((pvc->dlci << 3) & 0x78) | 0x80; | |
518 | data[i + 2] = 0x80; | |
519 | } | |
520 | ||
521 | if (pvc->state.new) | |
522 | data[i + 2] |= 0x08; | |
523 | else if (pvc->state.active) | |
524 | data[i + 2] |= 0x02; | |
525 | ||
1da177e4 LT |
526 | i += stat_len; |
527 | pvc = pvc->next; | |
528 | } | |
529 | } | |
530 | ||
531 | skb_put(skb, i); | |
532 | skb->priority = TC_PRIO_CONTROL; | |
533 | skb->dev = dev; | |
534 | skb->nh.raw = skb->data; | |
535 | ||
536 | dev_queue_xmit(skb); | |
537 | } | |
538 | ||
539 | ||
540 | ||
541 | static void fr_set_link_state(int reliable, struct net_device *dev) | |
542 | { | |
543 | hdlc_device *hdlc = dev_to_hdlc(dev); | |
544 | pvc_device *pvc = hdlc->state.fr.first_pvc; | |
545 | ||
546 | hdlc->state.fr.reliable = reliable; | |
547 | if (reliable) { | |
1f7bad72 | 548 | #if 0 |
1da177e4 LT |
549 | if (!netif_carrier_ok(dev)) |
550 | netif_carrier_on(dev); | |
1f7bad72 | 551 | #endif |
1da177e4 LT |
552 | |
553 | hdlc->state.fr.n391cnt = 0; /* Request full status */ | |
554 | hdlc->state.fr.dce_changed = 1; | |
555 | ||
556 | if (hdlc->state.fr.settings.lmi == LMI_NONE) { | |
557 | while (pvc) { /* Activate all PVCs */ | |
558 | pvc_carrier(1, pvc); | |
559 | pvc->state.exist = pvc->state.active = 1; | |
560 | pvc->state.new = 0; | |
561 | pvc = pvc->next; | |
562 | } | |
563 | } | |
564 | } else { | |
1f7bad72 | 565 | #if 0 |
1da177e4 LT |
566 | if (netif_carrier_ok(dev)) |
567 | netif_carrier_off(dev); | |
1f7bad72 | 568 | #endif |
1da177e4 LT |
569 | |
570 | while (pvc) { /* Deactivate all PVCs */ | |
571 | pvc_carrier(0, pvc); | |
572 | pvc->state.exist = pvc->state.active = 0; | |
573 | pvc->state.new = 0; | |
b3dd65f9 KH |
574 | if (!hdlc->state.fr.settings.dce) |
575 | pvc->state.bandwidth = 0; | |
1da177e4 LT |
576 | pvc = pvc->next; |
577 | } | |
578 | } | |
579 | } | |
580 | ||
581 | ||
582 | ||
583 | static void fr_timer(unsigned long arg) | |
584 | { | |
585 | struct net_device *dev = (struct net_device *)arg; | |
586 | hdlc_device *hdlc = dev_to_hdlc(dev); | |
587 | int i, cnt = 0, reliable; | |
588 | u32 list; | |
589 | ||
b3dd65f9 | 590 | if (hdlc->state.fr.settings.dce) { |
1da177e4 LT |
591 | reliable = hdlc->state.fr.request && |
592 | time_before(jiffies, hdlc->state.fr.last_poll + | |
593 | hdlc->state.fr.settings.t392 * HZ); | |
b3dd65f9 KH |
594 | hdlc->state.fr.request = 0; |
595 | } else { | |
1da177e4 LT |
596 | hdlc->state.fr.last_errors <<= 1; /* Shift the list */ |
597 | if (hdlc->state.fr.request) { | |
598 | if (hdlc->state.fr.reliable) | |
599 | printk(KERN_INFO "%s: No LMI status reply " | |
600 | "received\n", dev->name); | |
601 | hdlc->state.fr.last_errors |= 1; | |
602 | } | |
603 | ||
604 | list = hdlc->state.fr.last_errors; | |
605 | for (i = 0; i < hdlc->state.fr.settings.n393; i++, list >>= 1) | |
606 | cnt += (list & 1); /* errors count */ | |
607 | ||
608 | reliable = (cnt < hdlc->state.fr.settings.n392); | |
609 | } | |
610 | ||
611 | if (hdlc->state.fr.reliable != reliable) { | |
612 | printk(KERN_INFO "%s: Link %sreliable\n", dev->name, | |
613 | reliable ? "" : "un"); | |
614 | fr_set_link_state(reliable, dev); | |
615 | } | |
616 | ||
617 | if (hdlc->state.fr.settings.dce) | |
618 | hdlc->state.fr.timer.expires = jiffies + | |
619 | hdlc->state.fr.settings.t392 * HZ; | |
620 | else { | |
621 | if (hdlc->state.fr.n391cnt) | |
622 | hdlc->state.fr.n391cnt--; | |
623 | ||
624 | fr_lmi_send(dev, hdlc->state.fr.n391cnt == 0); | |
625 | ||
626 | hdlc->state.fr.last_poll = jiffies; | |
627 | hdlc->state.fr.request = 1; | |
628 | hdlc->state.fr.timer.expires = jiffies + | |
629 | hdlc->state.fr.settings.t391 * HZ; | |
630 | } | |
631 | ||
632 | hdlc->state.fr.timer.function = fr_timer; | |
633 | hdlc->state.fr.timer.data = arg; | |
634 | add_timer(&hdlc->state.fr.timer); | |
635 | } | |
636 | ||
637 | ||
638 | ||
639 | static int fr_lmi_recv(struct net_device *dev, struct sk_buff *skb) | |
640 | { | |
641 | hdlc_device *hdlc = dev_to_hdlc(dev); | |
1da177e4 | 642 | pvc_device *pvc; |
1da177e4 | 643 | u8 rxseq, txseq; |
b3dd65f9 KH |
644 | int lmi = hdlc->state.fr.settings.lmi; |
645 | int dce = hdlc->state.fr.settings.dce; | |
646 | int stat_len = (lmi == LMI_CISCO) ? 6 : 3, reptype, error, no_ram, i; | |
1da177e4 | 647 | |
b3dd65f9 KH |
648 | if (skb->len < (lmi == LMI_ANSI ? LMI_ANSI_LENGTH : |
649 | LMI_CCITT_CISCO_LENGTH)) { | |
1da177e4 LT |
650 | printk(KERN_INFO "%s: Short LMI frame\n", dev->name); |
651 | return 1; | |
652 | } | |
653 | ||
b3dd65f9 KH |
654 | if (skb->data[3] != (lmi == LMI_CISCO ? NLPID_CISCO_LMI : |
655 | NLPID_CCITT_ANSI_LMI)) { | |
656 | printk(KERN_INFO "%s: Received non-LMI frame with LMI" | |
657 | " DLCI\n", dev->name); | |
658 | return 1; | |
659 | } | |
660 | ||
661 | if (skb->data[4] != LMI_CALLREF) { | |
662 | printk(KERN_INFO "%s: Invalid LMI Call reference (0x%02X)\n", | |
663 | dev->name, skb->data[4]); | |
664 | return 1; | |
665 | } | |
666 | ||
667 | if (skb->data[5] != (dce ? LMI_STATUS_ENQUIRY : LMI_STATUS)) { | |
668 | printk(KERN_INFO "%s: Invalid LMI Message type (0x%02X)\n", | |
669 | dev->name, skb->data[5]); | |
1da177e4 LT |
670 | return 1; |
671 | } | |
672 | ||
b3dd65f9 KH |
673 | if (lmi == LMI_ANSI) { |
674 | if (skb->data[6] != LMI_ANSI_LOCKSHIFT) { | |
675 | printk(KERN_INFO "%s: Not ANSI locking shift in LMI" | |
676 | " message (0x%02X)\n", dev->name, skb->data[6]); | |
677 | return 1; | |
678 | } | |
679 | i = 7; | |
680 | } else | |
681 | i = 6; | |
1da177e4 | 682 | |
b3dd65f9 KH |
683 | if (skb->data[i] != (lmi == LMI_CCITT ? LMI_CCITT_REPTYPE : |
684 | LMI_ANSI_CISCO_REPTYPE)) { | |
685 | printk(KERN_INFO "%s: Not an LMI Report type IE (0x%02X)\n", | |
1da177e4 LT |
686 | dev->name, skb->data[i]); |
687 | return 1; | |
688 | } | |
1da177e4 | 689 | |
b3dd65f9 KH |
690 | if (skb->data[++i] != LMI_REPT_LEN) { |
691 | printk(KERN_INFO "%s: Invalid LMI Report type IE length" | |
692 | " (%u)\n", dev->name, skb->data[i]); | |
693 | return 1; | |
694 | } | |
1da177e4 | 695 | |
b3dd65f9 KH |
696 | reptype = skb->data[++i]; |
697 | if (reptype != LMI_INTEGRITY && reptype != LMI_FULLREP) { | |
698 | printk(KERN_INFO "%s: Unsupported LMI Report type (0x%02X)\n", | |
699 | dev->name, reptype); | |
700 | return 1; | |
701 | } | |
1da177e4 | 702 | |
b3dd65f9 KH |
703 | if (skb->data[++i] != (lmi == LMI_CCITT ? LMI_CCITT_ALIVE : |
704 | LMI_ANSI_CISCO_ALIVE)) { | |
705 | printk(KERN_INFO "%s: Not an LMI Link integrity verification" | |
706 | " IE (0x%02X)\n", dev->name, skb->data[i]); | |
1da177e4 LT |
707 | return 1; |
708 | } | |
1da177e4 | 709 | |
b3dd65f9 KH |
710 | if (skb->data[++i] != LMI_INTEG_LEN) { |
711 | printk(KERN_INFO "%s: Invalid LMI Link integrity verification" | |
712 | " IE length (%u)\n", dev->name, skb->data[i]); | |
713 | return 1; | |
714 | } | |
715 | i++; | |
1da177e4 LT |
716 | |
717 | hdlc->state.fr.rxseq = skb->data[i++]; /* TX sequence from peer */ | |
718 | rxseq = skb->data[i++]; /* Should confirm our sequence */ | |
719 | ||
720 | txseq = hdlc->state.fr.txseq; | |
721 | ||
b3dd65f9 | 722 | if (dce) |
1da177e4 | 723 | hdlc->state.fr.last_poll = jiffies; |
1da177e4 LT |
724 | |
725 | error = 0; | |
726 | if (!hdlc->state.fr.reliable) | |
727 | error = 1; | |
728 | ||
729 | if (rxseq == 0 || rxseq != txseq) { | |
730 | hdlc->state.fr.n391cnt = 0; /* Ask for full report next time */ | |
731 | error = 1; | |
732 | } | |
733 | ||
b3dd65f9 | 734 | if (dce) { |
1da177e4 LT |
735 | if (hdlc->state.fr.fullrep_sent && !error) { |
736 | /* Stop sending full report - the last one has been confirmed by DTE */ | |
737 | hdlc->state.fr.fullrep_sent = 0; | |
738 | pvc = hdlc->state.fr.first_pvc; | |
739 | while (pvc) { | |
740 | if (pvc->state.new) { | |
741 | pvc->state.new = 0; | |
742 | ||
743 | /* Tell DTE that new PVC is now active */ | |
744 | hdlc->state.fr.dce_changed = 1; | |
745 | } | |
746 | pvc = pvc->next; | |
747 | } | |
748 | } | |
749 | ||
750 | if (hdlc->state.fr.dce_changed) { | |
751 | reptype = LMI_FULLREP; | |
752 | hdlc->state.fr.fullrep_sent = 1; | |
753 | hdlc->state.fr.dce_changed = 0; | |
754 | } | |
755 | ||
b3dd65f9 | 756 | hdlc->state.fr.request = 1; /* got request */ |
1da177e4 LT |
757 | fr_lmi_send(dev, reptype == LMI_FULLREP ? 1 : 0); |
758 | return 0; | |
759 | } | |
760 | ||
761 | /* DTE */ | |
762 | ||
763 | hdlc->state.fr.request = 0; /* got response, no request pending */ | |
764 | ||
765 | if (error) | |
766 | return 0; | |
767 | ||
768 | if (reptype != LMI_FULLREP) | |
769 | return 0; | |
770 | ||
1da177e4 LT |
771 | pvc = hdlc->state.fr.first_pvc; |
772 | ||
773 | while (pvc) { | |
774 | pvc->state.deleted = 1; | |
775 | pvc = pvc->next; | |
776 | } | |
777 | ||
778 | no_ram = 0; | |
779 | while (skb->len >= i + 2 + stat_len) { | |
780 | u16 dlci; | |
b3dd65f9 | 781 | u32 bw; |
1da177e4 LT |
782 | unsigned int active, new; |
783 | ||
b3dd65f9 KH |
784 | if (skb->data[i] != (lmi == LMI_CCITT ? LMI_CCITT_PVCSTAT : |
785 | LMI_ANSI_CISCO_PVCSTAT)) { | |
786 | printk(KERN_INFO "%s: Not an LMI PVC status IE" | |
787 | " (0x%02X)\n", dev->name, skb->data[i]); | |
1da177e4 LT |
788 | return 1; |
789 | } | |
1da177e4 | 790 | |
b3dd65f9 KH |
791 | if (skb->data[++i] != stat_len) { |
792 | printk(KERN_INFO "%s: Invalid LMI PVC status IE length" | |
793 | " (%u)\n", dev->name, skb->data[i]); | |
1da177e4 LT |
794 | return 1; |
795 | } | |
796 | i++; | |
797 | ||
b3dd65f9 KH |
798 | new = !! (skb->data[i + 2] & 0x08); |
799 | active = !! (skb->data[i + 2] & 0x02); | |
800 | if (lmi == LMI_CISCO) { | |
801 | dlci = (skb->data[i] << 8) | skb->data[i + 1]; | |
802 | bw = (skb->data[i + 3] << 16) | | |
803 | (skb->data[i + 4] << 8) | | |
804 | (skb->data[i + 5]); | |
805 | } else { | |
806 | dlci = ((skb->data[i] & 0x3F) << 4) | | |
807 | ((skb->data[i + 1] & 0x78) >> 3); | |
808 | bw = 0; | |
809 | } | |
1da177e4 LT |
810 | |
811 | pvc = add_pvc(dev, dlci); | |
812 | ||
813 | if (!pvc && !no_ram) { | |
814 | printk(KERN_WARNING | |
815 | "%s: Memory squeeze on fr_lmi_recv()\n", | |
816 | dev->name); | |
817 | no_ram = 1; | |
818 | } | |
819 | ||
820 | if (pvc) { | |
821 | pvc->state.exist = 1; | |
822 | pvc->state.deleted = 0; | |
823 | if (active != pvc->state.active || | |
824 | new != pvc->state.new || | |
b3dd65f9 | 825 | bw != pvc->state.bandwidth || |
1da177e4 LT |
826 | !pvc->state.exist) { |
827 | pvc->state.new = new; | |
828 | pvc->state.active = active; | |
b3dd65f9 | 829 | pvc->state.bandwidth = bw; |
1da177e4 LT |
830 | pvc_carrier(active, pvc); |
831 | fr_log_dlci_active(pvc); | |
832 | } | |
833 | } | |
834 | ||
835 | i += stat_len; | |
836 | } | |
837 | ||
838 | pvc = hdlc->state.fr.first_pvc; | |
839 | ||
840 | while (pvc) { | |
841 | if (pvc->state.deleted && pvc->state.exist) { | |
842 | pvc_carrier(0, pvc); | |
843 | pvc->state.active = pvc->state.new = 0; | |
844 | pvc->state.exist = 0; | |
b3dd65f9 | 845 | pvc->state.bandwidth = 0; |
1da177e4 LT |
846 | fr_log_dlci_active(pvc); |
847 | } | |
848 | pvc = pvc->next; | |
849 | } | |
850 | ||
851 | /* Next full report after N391 polls */ | |
852 | hdlc->state.fr.n391cnt = hdlc->state.fr.settings.n391; | |
853 | ||
854 | return 0; | |
855 | } | |
856 | ||
857 | ||
858 | ||
859 | static int fr_rx(struct sk_buff *skb) | |
860 | { | |
861 | struct net_device *ndev = skb->dev; | |
862 | hdlc_device *hdlc = dev_to_hdlc(ndev); | |
863 | fr_hdr *fh = (fr_hdr*)skb->data; | |
864 | u8 *data = skb->data; | |
865 | u16 dlci; | |
866 | pvc_device *pvc; | |
867 | struct net_device *dev = NULL; | |
868 | ||
869 | if (skb->len <= 4 || fh->ea1 || data[2] != FR_UI) | |
870 | goto rx_error; | |
871 | ||
872 | dlci = q922_to_dlci(skb->data); | |
873 | ||
b3dd65f9 KH |
874 | if ((dlci == LMI_CCITT_ANSI_DLCI && |
875 | (hdlc->state.fr.settings.lmi == LMI_ANSI || | |
876 | hdlc->state.fr.settings.lmi == LMI_CCITT)) || | |
877 | (dlci == LMI_CISCO_DLCI && | |
878 | hdlc->state.fr.settings.lmi == LMI_CISCO)) { | |
879 | if (fr_lmi_recv(ndev, skb)) | |
880 | goto rx_error; | |
881 | dev_kfree_skb_any(skb); | |
882 | return NET_RX_SUCCESS; | |
1da177e4 LT |
883 | } |
884 | ||
885 | pvc = find_pvc(hdlc, dlci); | |
886 | if (!pvc) { | |
887 | #ifdef DEBUG_PKT | |
888 | printk(KERN_INFO "%s: No PVC for received frame's DLCI %d\n", | |
889 | ndev->name, dlci); | |
890 | #endif | |
891 | dev_kfree_skb_any(skb); | |
892 | return NET_RX_DROP; | |
893 | } | |
894 | ||
895 | if (pvc->state.fecn != fh->fecn) { | |
896 | #ifdef DEBUG_ECN | |
897 | printk(KERN_DEBUG "%s: DLCI %d FECN O%s\n", ndev->name, | |
898 | dlci, fh->fecn ? "N" : "FF"); | |
899 | #endif | |
900 | pvc->state.fecn ^= 1; | |
901 | } | |
902 | ||
903 | if (pvc->state.becn != fh->becn) { | |
904 | #ifdef DEBUG_ECN | |
905 | printk(KERN_DEBUG "%s: DLCI %d BECN O%s\n", ndev->name, | |
906 | dlci, fh->becn ? "N" : "FF"); | |
907 | #endif | |
908 | pvc->state.becn ^= 1; | |
909 | } | |
910 | ||
911 | ||
912 | if ((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL) { | |
913 | hdlc->stats.rx_dropped++; | |
914 | return NET_RX_DROP; | |
915 | } | |
916 | ||
917 | if (data[3] == NLPID_IP) { | |
918 | skb_pull(skb, 4); /* Remove 4-byte header (hdr, UI, NLPID) */ | |
919 | dev = pvc->main; | |
920 | skb->protocol = htons(ETH_P_IP); | |
921 | ||
922 | } else if (data[3] == NLPID_IPV6) { | |
923 | skb_pull(skb, 4); /* Remove 4-byte header (hdr, UI, NLPID) */ | |
924 | dev = pvc->main; | |
925 | skb->protocol = htons(ETH_P_IPV6); | |
926 | ||
927 | } else if (skb->len > 10 && data[3] == FR_PAD && | |
928 | data[4] == NLPID_SNAP && data[5] == FR_PAD) { | |
929 | u16 oui = ntohs(*(u16*)(data + 6)); | |
930 | u16 pid = ntohs(*(u16*)(data + 8)); | |
931 | skb_pull(skb, 10); | |
932 | ||
933 | switch ((((u32)oui) << 16) | pid) { | |
934 | case ETH_P_ARP: /* routed frame with SNAP */ | |
935 | case ETH_P_IPX: | |
936 | case ETH_P_IP: /* a long variant */ | |
937 | case ETH_P_IPV6: | |
938 | dev = pvc->main; | |
939 | skb->protocol = htons(pid); | |
940 | break; | |
941 | ||
942 | case 0x80C20007: /* bridged Ethernet frame */ | |
943 | if ((dev = pvc->ether) != NULL) | |
944 | skb->protocol = eth_type_trans(skb, dev); | |
945 | break; | |
946 | ||
947 | default: | |
948 | printk(KERN_INFO "%s: Unsupported protocol, OUI=%x " | |
949 | "PID=%x\n", ndev->name, oui, pid); | |
950 | dev_kfree_skb_any(skb); | |
951 | return NET_RX_DROP; | |
952 | } | |
953 | } else { | |
954 | printk(KERN_INFO "%s: Unsupported protocol, NLPID=%x " | |
955 | "length = %i\n", ndev->name, data[3], skb->len); | |
956 | dev_kfree_skb_any(skb); | |
957 | return NET_RX_DROP; | |
958 | } | |
959 | ||
960 | if (dev) { | |
961 | struct net_device_stats *stats = pvc_get_stats(dev); | |
962 | stats->rx_packets++; /* PVC traffic */ | |
963 | stats->rx_bytes += skb->len; | |
964 | if (pvc->state.becn) | |
965 | stats->rx_compressed++; | |
966 | skb->dev = dev; | |
967 | netif_rx(skb); | |
968 | return NET_RX_SUCCESS; | |
969 | } else { | |
970 | dev_kfree_skb_any(skb); | |
971 | return NET_RX_DROP; | |
972 | } | |
973 | ||
974 | rx_error: | |
975 | hdlc->stats.rx_errors++; /* Mark error */ | |
976 | dev_kfree_skb_any(skb); | |
977 | return NET_RX_DROP; | |
978 | } | |
979 | ||
980 | ||
981 | ||
982 | static void fr_start(struct net_device *dev) | |
983 | { | |
984 | hdlc_device *hdlc = dev_to_hdlc(dev); | |
985 | #ifdef DEBUG_LINK | |
986 | printk(KERN_DEBUG "fr_start\n"); | |
987 | #endif | |
988 | if (hdlc->state.fr.settings.lmi != LMI_NONE) { | |
989 | hdlc->state.fr.reliable = 0; | |
990 | hdlc->state.fr.dce_changed = 1; | |
991 | hdlc->state.fr.request = 0; | |
992 | hdlc->state.fr.fullrep_sent = 0; | |
993 | hdlc->state.fr.last_errors = 0xFFFFFFFF; | |
994 | hdlc->state.fr.n391cnt = 0; | |
995 | hdlc->state.fr.txseq = hdlc->state.fr.rxseq = 0; | |
996 | ||
997 | init_timer(&hdlc->state.fr.timer); | |
998 | /* First poll after 1 s */ | |
999 | hdlc->state.fr.timer.expires = jiffies + HZ; | |
1000 | hdlc->state.fr.timer.function = fr_timer; | |
1001 | hdlc->state.fr.timer.data = (unsigned long)dev; | |
1002 | add_timer(&hdlc->state.fr.timer); | |
1003 | } else | |
1004 | fr_set_link_state(1, dev); | |
1005 | } | |
1006 | ||
1007 | ||
1008 | ||
1009 | static void fr_stop(struct net_device *dev) | |
1010 | { | |
1011 | hdlc_device *hdlc = dev_to_hdlc(dev); | |
1012 | #ifdef DEBUG_LINK | |
1013 | printk(KERN_DEBUG "fr_stop\n"); | |
1014 | #endif | |
1015 | if (hdlc->state.fr.settings.lmi != LMI_NONE) | |
1016 | del_timer_sync(&hdlc->state.fr.timer); | |
1017 | fr_set_link_state(0, dev); | |
1018 | } | |
1019 | ||
1020 | ||
1021 | ||
1022 | static void fr_close(struct net_device *dev) | |
1023 | { | |
1024 | hdlc_device *hdlc = dev_to_hdlc(dev); | |
1025 | pvc_device *pvc = hdlc->state.fr.first_pvc; | |
1026 | ||
1027 | while (pvc) { /* Shutdown all PVCs for this FRAD */ | |
1028 | if (pvc->main) | |
1029 | dev_close(pvc->main); | |
1030 | if (pvc->ether) | |
1031 | dev_close(pvc->ether); | |
1032 | pvc = pvc->next; | |
1033 | } | |
1034 | } | |
1035 | ||
1036 | static void dlci_setup(struct net_device *dev) | |
1037 | { | |
1038 | dev->type = ARPHRD_DLCI; | |
1039 | dev->flags = IFF_POINTOPOINT; | |
1040 | dev->hard_header_len = 10; | |
1041 | dev->addr_len = 2; | |
1042 | } | |
1043 | ||
1044 | static int fr_add_pvc(struct net_device *master, unsigned int dlci, int type) | |
1045 | { | |
1046 | hdlc_device *hdlc = dev_to_hdlc(master); | |
1047 | pvc_device *pvc = NULL; | |
1048 | struct net_device *dev; | |
1049 | int result, used; | |
1050 | char * prefix = "pvc%d"; | |
1051 | ||
1052 | if (type == ARPHRD_ETHER) | |
1053 | prefix = "pvceth%d"; | |
1054 | ||
1055 | if ((pvc = add_pvc(master, dlci)) == NULL) { | |
1056 | printk(KERN_WARNING "%s: Memory squeeze on fr_add_pvc()\n", | |
1057 | master->name); | |
1058 | return -ENOBUFS; | |
1059 | } | |
1060 | ||
1061 | if (*get_dev_p(pvc, type)) | |
1062 | return -EEXIST; | |
1063 | ||
1064 | used = pvc_is_used(pvc); | |
1065 | ||
1066 | if (type == ARPHRD_ETHER) | |
1067 | dev = alloc_netdev(sizeof(struct net_device_stats), | |
1068 | "pvceth%d", ether_setup); | |
1069 | else | |
1070 | dev = alloc_netdev(sizeof(struct net_device_stats), | |
1071 | "pvc%d", dlci_setup); | |
1072 | ||
1073 | if (!dev) { | |
1074 | printk(KERN_WARNING "%s: Memory squeeze on fr_pvc()\n", | |
1075 | master->name); | |
1076 | delete_unused_pvcs(hdlc); | |
1077 | return -ENOBUFS; | |
1078 | } | |
1079 | ||
1080 | if (type == ARPHRD_ETHER) { | |
1081 | memcpy(dev->dev_addr, "\x00\x01", 2); | |
1082 | get_random_bytes(dev->dev_addr + 2, ETH_ALEN - 2); | |
1083 | } else { | |
1084 | *(u16*)dev->dev_addr = htons(dlci); | |
1085 | dlci_to_q922(dev->broadcast, dlci); | |
1086 | } | |
1087 | dev->hard_start_xmit = pvc_xmit; | |
1088 | dev->get_stats = pvc_get_stats; | |
1089 | dev->open = pvc_open; | |
1090 | dev->stop = pvc_close; | |
1091 | dev->do_ioctl = pvc_ioctl; | |
1092 | dev->change_mtu = pvc_change_mtu; | |
1093 | dev->mtu = HDLC_MAX_MTU; | |
1094 | dev->tx_queue_len = 0; | |
1095 | dev->priv = pvc; | |
1096 | ||
1097 | result = dev_alloc_name(dev, dev->name); | |
1098 | if (result < 0) { | |
1099 | free_netdev(dev); | |
1100 | delete_unused_pvcs(hdlc); | |
1101 | return result; | |
1102 | } | |
1103 | ||
1104 | if (register_netdevice(dev) != 0) { | |
1105 | free_netdev(dev); | |
1106 | delete_unused_pvcs(hdlc); | |
1107 | return -EIO; | |
1108 | } | |
1109 | ||
1110 | dev->destructor = free_netdev; | |
1111 | *get_dev_p(pvc, type) = dev; | |
1112 | if (!used) { | |
1113 | hdlc->state.fr.dce_changed = 1; | |
1114 | hdlc->state.fr.dce_pvc_count++; | |
1115 | } | |
1116 | return 0; | |
1117 | } | |
1118 | ||
1119 | ||
1120 | ||
1121 | static int fr_del_pvc(hdlc_device *hdlc, unsigned int dlci, int type) | |
1122 | { | |
1123 | pvc_device *pvc; | |
1124 | struct net_device *dev; | |
1125 | ||
1126 | if ((pvc = find_pvc(hdlc, dlci)) == NULL) | |
1127 | return -ENOENT; | |
1128 | ||
1129 | if ((dev = *get_dev_p(pvc, type)) == NULL) | |
1130 | return -ENOENT; | |
1131 | ||
1132 | if (dev->flags & IFF_UP) | |
1133 | return -EBUSY; /* PVC in use */ | |
1134 | ||
1135 | unregister_netdevice(dev); /* the destructor will free_netdev(dev) */ | |
1136 | *get_dev_p(pvc, type) = NULL; | |
1137 | ||
1138 | if (!pvc_is_used(pvc)) { | |
1139 | hdlc->state.fr.dce_pvc_count--; | |
1140 | hdlc->state.fr.dce_changed = 1; | |
1141 | } | |
1142 | delete_unused_pvcs(hdlc); | |
1143 | return 0; | |
1144 | } | |
1145 | ||
1146 | ||
1147 | ||
1148 | static void fr_destroy(hdlc_device *hdlc) | |
1149 | { | |
1150 | pvc_device *pvc; | |
1151 | ||
1152 | pvc = hdlc->state.fr.first_pvc; | |
1153 | hdlc->state.fr.first_pvc = NULL; /* All PVCs destroyed */ | |
1154 | hdlc->state.fr.dce_pvc_count = 0; | |
1155 | hdlc->state.fr.dce_changed = 1; | |
1156 | ||
1157 | while (pvc) { | |
1158 | pvc_device *next = pvc->next; | |
1159 | /* destructors will free_netdev() main and ether */ | |
1160 | if (pvc->main) | |
1161 | unregister_netdevice(pvc->main); | |
1162 | ||
1163 | if (pvc->ether) | |
1164 | unregister_netdevice(pvc->ether); | |
1165 | ||
1166 | kfree(pvc); | |
1167 | pvc = next; | |
1168 | } | |
1169 | } | |
1170 | ||
1171 | ||
1172 | ||
1173 | int hdlc_fr_ioctl(struct net_device *dev, struct ifreq *ifr) | |
1174 | { | |
1175 | fr_proto __user *fr_s = ifr->ifr_settings.ifs_ifsu.fr; | |
1176 | const size_t size = sizeof(fr_proto); | |
1177 | fr_proto new_settings; | |
1178 | hdlc_device *hdlc = dev_to_hdlc(dev); | |
1179 | fr_proto_pvc pvc; | |
1180 | int result; | |
1181 | ||
1182 | switch (ifr->ifr_settings.type) { | |
1183 | case IF_GET_PROTO: | |
1184 | ifr->ifr_settings.type = IF_PROTO_FR; | |
1185 | if (ifr->ifr_settings.size < size) { | |
1186 | ifr->ifr_settings.size = size; /* data size wanted */ | |
1187 | return -ENOBUFS; | |
1188 | } | |
1189 | if (copy_to_user(fr_s, &hdlc->state.fr.settings, size)) | |
1190 | return -EFAULT; | |
1191 | return 0; | |
1192 | ||
1193 | case IF_PROTO_FR: | |
1194 | if(!capable(CAP_NET_ADMIN)) | |
1195 | return -EPERM; | |
1196 | ||
1197 | if(dev->flags & IFF_UP) | |
1198 | return -EBUSY; | |
1199 | ||
1200 | if (copy_from_user(&new_settings, fr_s, size)) | |
1201 | return -EFAULT; | |
1202 | ||
1203 | if (new_settings.lmi == LMI_DEFAULT) | |
1204 | new_settings.lmi = LMI_ANSI; | |
1205 | ||
1206 | if ((new_settings.lmi != LMI_NONE && | |
1207 | new_settings.lmi != LMI_ANSI && | |
b3dd65f9 KH |
1208 | new_settings.lmi != LMI_CCITT && |
1209 | new_settings.lmi != LMI_CISCO) || | |
1da177e4 LT |
1210 | new_settings.t391 < 1 || |
1211 | new_settings.t392 < 2 || | |
1212 | new_settings.n391 < 1 || | |
1213 | new_settings.n392 < 1 || | |
1214 | new_settings.n393 < new_settings.n392 || | |
1215 | new_settings.n393 > 32 || | |
1216 | (new_settings.dce != 0 && | |
1217 | new_settings.dce != 1)) | |
1218 | return -EINVAL; | |
1219 | ||
1220 | result=hdlc->attach(dev, ENCODING_NRZ,PARITY_CRC16_PR1_CCITT); | |
1221 | if (result) | |
1222 | return result; | |
1223 | ||
1224 | if (hdlc->proto.id != IF_PROTO_FR) { | |
1225 | hdlc_proto_detach(hdlc); | |
1226 | hdlc->state.fr.first_pvc = NULL; | |
1227 | hdlc->state.fr.dce_pvc_count = 0; | |
1228 | } | |
1229 | memcpy(&hdlc->state.fr.settings, &new_settings, size); | |
1230 | memset(&hdlc->proto, 0, sizeof(hdlc->proto)); | |
1231 | ||
1232 | hdlc->proto.close = fr_close; | |
1233 | hdlc->proto.start = fr_start; | |
1234 | hdlc->proto.stop = fr_stop; | |
1235 | hdlc->proto.detach = fr_destroy; | |
1236 | hdlc->proto.netif_rx = fr_rx; | |
1237 | hdlc->proto.id = IF_PROTO_FR; | |
1238 | dev->hard_start_xmit = hdlc->xmit; | |
1239 | dev->hard_header = NULL; | |
1240 | dev->type = ARPHRD_FRAD; | |
1241 | dev->flags = IFF_POINTOPOINT | IFF_NOARP; | |
1242 | dev->addr_len = 0; | |
1243 | return 0; | |
1244 | ||
1245 | case IF_PROTO_FR_ADD_PVC: | |
1246 | case IF_PROTO_FR_DEL_PVC: | |
1247 | case IF_PROTO_FR_ADD_ETH_PVC: | |
1248 | case IF_PROTO_FR_DEL_ETH_PVC: | |
1249 | if(!capable(CAP_NET_ADMIN)) | |
1250 | return -EPERM; | |
1251 | ||
1252 | if (copy_from_user(&pvc, ifr->ifr_settings.ifs_ifsu.fr_pvc, | |
1253 | sizeof(fr_proto_pvc))) | |
1254 | return -EFAULT; | |
1255 | ||
1256 | if (pvc.dlci <= 0 || pvc.dlci >= 1024) | |
1257 | return -EINVAL; /* Only 10 bits, DLCI 0 reserved */ | |
1258 | ||
1259 | if (ifr->ifr_settings.type == IF_PROTO_FR_ADD_ETH_PVC || | |
1260 | ifr->ifr_settings.type == IF_PROTO_FR_DEL_ETH_PVC) | |
1261 | result = ARPHRD_ETHER; /* bridged Ethernet device */ | |
1262 | else | |
1263 | result = ARPHRD_DLCI; | |
1264 | ||
1265 | if (ifr->ifr_settings.type == IF_PROTO_FR_ADD_PVC || | |
1266 | ifr->ifr_settings.type == IF_PROTO_FR_ADD_ETH_PVC) | |
1267 | return fr_add_pvc(dev, pvc.dlci, result); | |
1268 | else | |
1269 | return fr_del_pvc(hdlc, pvc.dlci, result); | |
1270 | } | |
1271 | ||
1272 | return -EINVAL; | |
1273 | } |