Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * Generic HDLC support routines for Linux | |
3 | * Frame Relay support | |
4 | * | |
eb2a2fd9 | 5 | * Copyright (C) 1999 - 2006 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 | ||
1da177e4 | 36 | #include <linux/errno.h> |
4dfce407 KH |
37 | #include <linux/etherdevice.h> |
38 | #include <linux/hdlc.h> | |
1da177e4 | 39 | #include <linux/if_arp.h> |
4dfce407 | 40 | #include <linux/inetdevice.h> |
1da177e4 | 41 | #include <linux/init.h> |
4dfce407 KH |
42 | #include <linux/kernel.h> |
43 | #include <linux/module.h> | |
1da177e4 | 44 | #include <linux/pkt_sched.h> |
4dfce407 | 45 | #include <linux/poll.h> |
1da177e4 | 46 | #include <linux/rtnetlink.h> |
4dfce407 KH |
47 | #include <linux/skbuff.h> |
48 | #include <linux/slab.h> | |
1da177e4 LT |
49 | |
50 | #undef DEBUG_PKT | |
51 | #undef DEBUG_ECN | |
52 | #undef DEBUG_LINK | |
eb2a2fd9 KH |
53 | #undef DEBUG_PROTO |
54 | #undef DEBUG_PVC | |
1da177e4 | 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 | ||
3fadb06d | 93 | struct fr_hdr { |
1da177e4 LT |
94 | #if defined(__LITTLE_ENDIAN_BITFIELD) |
95 | unsigned ea1: 1; | |
96 | unsigned cr: 1; | |
97 | unsigned dlcih: 6; | |
4dfce407 | 98 | |
1da177e4 LT |
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 | |
3fadb06d | 115 | } __packed; |
1da177e4 LT |
116 | |
117 | ||
3fadb06d | 118 | struct pvc_device { |
eb2a2fd9 KH |
119 | struct net_device *frad; |
120 | struct net_device *main; | |
121 | struct net_device *ether; /* bridged Ethernet interface */ | |
3fadb06d | 122 | struct pvc_device *next; /* Sorted in ascending DLCI order */ |
eb2a2fd9 KH |
123 | int dlci; |
124 | int open_count; | |
125 | ||
126 | struct { | |
127 | unsigned int new: 1; | |
128 | unsigned int active: 1; | |
129 | unsigned int exist: 1; | |
130 | unsigned int deleted: 1; | |
131 | unsigned int fecn: 1; | |
132 | unsigned int becn: 1; | |
133 | unsigned int bandwidth; /* Cisco LMI reporting only */ | |
134 | }state; | |
3fadb06d | 135 | }; |
eb2a2fd9 | 136 | |
eb2a2fd9 KH |
137 | struct frad_state { |
138 | fr_proto settings; | |
3fadb06d | 139 | struct pvc_device *first_pvc; |
eb2a2fd9 KH |
140 | int dce_pvc_count; |
141 | ||
142 | struct timer_list timer; | |
143 | unsigned long last_poll; | |
144 | int reliable; | |
145 | int dce_changed; | |
146 | int request; | |
147 | int fullrep_sent; | |
148 | u32 last_errors; /* last errors bit list */ | |
149 | u8 n391cnt; | |
150 | u8 txseq; /* TX sequence number */ | |
151 | u8 rxseq; /* RX sequence number */ | |
152 | }; | |
153 | ||
154 | ||
155 | static int fr_ioctl(struct net_device *dev, struct ifreq *ifr); | |
156 | ||
157 | ||
1da177e4 LT |
158 | static inline u16 q922_to_dlci(u8 *hdr) |
159 | { | |
160 | return ((hdr[0] & 0xFC) << 2) | ((hdr[1] & 0xF0) >> 4); | |
161 | } | |
162 | ||
163 | ||
1da177e4 LT |
164 | static inline void dlci_to_q922(u8 *hdr, u16 dlci) |
165 | { | |
166 | hdr[0] = (dlci >> 2) & 0xFC; | |
167 | hdr[1] = ((dlci << 4) & 0xF0) | 0x01; | |
168 | } | |
169 | ||
170 | ||
983e2304 | 171 | static inline struct frad_state* state(hdlc_device *hdlc) |
eb2a2fd9 KH |
172 | { |
173 | return(struct frad_state *)(hdlc->state); | |
174 | } | |
175 | ||
eb2a2fd9 | 176 | |
3fadb06d | 177 | static inline struct pvc_device *find_pvc(hdlc_device *hdlc, u16 dlci) |
1da177e4 | 178 | { |
3fadb06d | 179 | struct pvc_device *pvc = state(hdlc)->first_pvc; |
1da177e4 LT |
180 | |
181 | while (pvc) { | |
182 | if (pvc->dlci == dlci) | |
183 | return pvc; | |
184 | if (pvc->dlci > dlci) | |
870571a2 | 185 | return NULL; /* the list is sorted */ |
1da177e4 LT |
186 | pvc = pvc->next; |
187 | } | |
188 | ||
189 | return NULL; | |
190 | } | |
191 | ||
192 | ||
3fadb06d | 193 | static struct pvc_device *add_pvc(struct net_device *dev, u16 dlci) |
1da177e4 LT |
194 | { |
195 | hdlc_device *hdlc = dev_to_hdlc(dev); | |
3fadb06d | 196 | struct pvc_device *pvc, **pvc_p = &state(hdlc)->first_pvc; |
1da177e4 LT |
197 | |
198 | while (*pvc_p) { | |
199 | if ((*pvc_p)->dlci == dlci) | |
200 | return *pvc_p; | |
201 | if ((*pvc_p)->dlci > dlci) | |
202 | break; /* the list is sorted */ | |
203 | pvc_p = &(*pvc_p)->next; | |
204 | } | |
205 | ||
3fadb06d | 206 | pvc = kzalloc(sizeof(*pvc), GFP_ATOMIC); |
eb2a2fd9 KH |
207 | #ifdef DEBUG_PVC |
208 | printk(KERN_DEBUG "add_pvc: allocated pvc %p, frad %p\n", pvc, dev); | |
209 | #endif | |
1da177e4 LT |
210 | if (!pvc) |
211 | return NULL; | |
212 | ||
1da177e4 | 213 | pvc->dlci = dlci; |
eb2a2fd9 | 214 | pvc->frad = dev; |
1da177e4 LT |
215 | pvc->next = *pvc_p; /* Put it in the chain */ |
216 | *pvc_p = pvc; | |
217 | return pvc; | |
218 | } | |
219 | ||
220 | ||
3fadb06d | 221 | static inline int pvc_is_used(struct pvc_device *pvc) |
1da177e4 | 222 | { |
eb2a2fd9 | 223 | return pvc->main || pvc->ether; |
1da177e4 LT |
224 | } |
225 | ||
226 | ||
3fadb06d | 227 | static inline void pvc_carrier(int on, struct pvc_device *pvc) |
1da177e4 LT |
228 | { |
229 | if (on) { | |
230 | if (pvc->main) | |
231 | if (!netif_carrier_ok(pvc->main)) | |
232 | netif_carrier_on(pvc->main); | |
233 | if (pvc->ether) | |
234 | if (!netif_carrier_ok(pvc->ether)) | |
235 | netif_carrier_on(pvc->ether); | |
236 | } else { | |
237 | if (pvc->main) | |
238 | if (netif_carrier_ok(pvc->main)) | |
239 | netif_carrier_off(pvc->main); | |
240 | if (pvc->ether) | |
241 | if (netif_carrier_ok(pvc->ether)) | |
242 | netif_carrier_off(pvc->ether); | |
243 | } | |
244 | } | |
245 | ||
246 | ||
247 | static inline void delete_unused_pvcs(hdlc_device *hdlc) | |
248 | { | |
3fadb06d | 249 | struct pvc_device **pvc_p = &state(hdlc)->first_pvc; |
1da177e4 LT |
250 | |
251 | while (*pvc_p) { | |
252 | if (!pvc_is_used(*pvc_p)) { | |
3fadb06d | 253 | struct pvc_device *pvc = *pvc_p; |
eb2a2fd9 KH |
254 | #ifdef DEBUG_PVC |
255 | printk(KERN_DEBUG "freeing unused pvc: %p\n", pvc); | |
256 | #endif | |
1da177e4 LT |
257 | *pvc_p = pvc->next; |
258 | kfree(pvc); | |
259 | continue; | |
260 | } | |
261 | pvc_p = &(*pvc_p)->next; | |
262 | } | |
263 | } | |
264 | ||
265 | ||
3fadb06d HS |
266 | static inline struct net_device **get_dev_p(struct pvc_device *pvc, |
267 | int type) | |
1da177e4 LT |
268 | { |
269 | if (type == ARPHRD_ETHER) | |
270 | return &pvc->ether; | |
271 | else | |
272 | return &pvc->main; | |
273 | } | |
274 | ||
275 | ||
1da177e4 LT |
276 | static int fr_hard_header(struct sk_buff **skb_p, u16 dlci) |
277 | { | |
278 | u16 head_len; | |
279 | struct sk_buff *skb = *skb_p; | |
280 | ||
281 | switch (skb->protocol) { | |
09640e63 | 282 | case cpu_to_be16(NLPID_CCITT_ANSI_LMI): |
1da177e4 LT |
283 | head_len = 4; |
284 | skb_push(skb, head_len); | |
b3dd65f9 | 285 | skb->data[3] = NLPID_CCITT_ANSI_LMI; |
1da177e4 LT |
286 | break; |
287 | ||
09640e63 | 288 | case cpu_to_be16(NLPID_CISCO_LMI): |
1da177e4 LT |
289 | head_len = 4; |
290 | skb_push(skb, head_len); | |
b3dd65f9 | 291 | skb->data[3] = NLPID_CISCO_LMI; |
1da177e4 LT |
292 | break; |
293 | ||
09640e63 | 294 | case cpu_to_be16(ETH_P_IP): |
b3dd65f9 KH |
295 | head_len = 4; |
296 | skb_push(skb, head_len); | |
297 | skb->data[3] = NLPID_IP; | |
298 | break; | |
299 | ||
09640e63 | 300 | case cpu_to_be16(ETH_P_IPV6): |
1da177e4 LT |
301 | head_len = 4; |
302 | skb_push(skb, head_len); | |
b3dd65f9 | 303 | skb->data[3] = NLPID_IPV6; |
1da177e4 LT |
304 | break; |
305 | ||
09640e63 | 306 | case cpu_to_be16(ETH_P_802_3): |
1da177e4 LT |
307 | head_len = 10; |
308 | if (skb_headroom(skb) < head_len) { | |
309 | struct sk_buff *skb2 = skb_realloc_headroom(skb, | |
310 | head_len); | |
311 | if (!skb2) | |
312 | return -ENOBUFS; | |
313 | dev_kfree_skb(skb); | |
314 | skb = *skb_p = skb2; | |
315 | } | |
316 | skb_push(skb, head_len); | |
317 | skb->data[3] = FR_PAD; | |
318 | skb->data[4] = NLPID_SNAP; | |
319 | skb->data[5] = FR_PAD; | |
320 | skb->data[6] = 0x80; | |
321 | skb->data[7] = 0xC2; | |
322 | skb->data[8] = 0x00; | |
323 | skb->data[9] = 0x07; /* bridged Ethernet frame w/out FCS */ | |
324 | break; | |
325 | ||
326 | default: | |
327 | head_len = 10; | |
328 | skb_push(skb, head_len); | |
329 | skb->data[3] = FR_PAD; | |
330 | skb->data[4] = NLPID_SNAP; | |
331 | skb->data[5] = FR_PAD; | |
332 | skb->data[6] = FR_PAD; | |
333 | skb->data[7] = FR_PAD; | |
abf17ffd | 334 | *(__be16*)(skb->data + 8) = skb->protocol; |
1da177e4 LT |
335 | } |
336 | ||
337 | dlci_to_q922(skb->data, dlci); | |
338 | skb->data[2] = FR_UI; | |
339 | return 0; | |
340 | } | |
341 | ||
342 | ||
343 | ||
344 | static int pvc_open(struct net_device *dev) | |
345 | { | |
3fadb06d | 346 | struct pvc_device *pvc = dev->ml_priv; |
1da177e4 | 347 | |
eb2a2fd9 KH |
348 | if ((pvc->frad->flags & IFF_UP) == 0) |
349 | return -EIO; /* Frad must be UP in order to activate PVC */ | |
1da177e4 LT |
350 | |
351 | if (pvc->open_count++ == 0) { | |
eb2a2fd9 KH |
352 | hdlc_device *hdlc = dev_to_hdlc(pvc->frad); |
353 | if (state(hdlc)->settings.lmi == LMI_NONE) | |
354 | pvc->state.active = netif_carrier_ok(pvc->frad); | |
1da177e4 LT |
355 | |
356 | pvc_carrier(pvc->state.active, pvc); | |
eb2a2fd9 | 357 | state(hdlc)->dce_changed = 1; |
1da177e4 LT |
358 | } |
359 | return 0; | |
360 | } | |
361 | ||
362 | ||
363 | ||
364 | static int pvc_close(struct net_device *dev) | |
365 | { | |
3fadb06d | 366 | struct pvc_device *pvc = dev->ml_priv; |
1da177e4 LT |
367 | |
368 | if (--pvc->open_count == 0) { | |
eb2a2fd9 KH |
369 | hdlc_device *hdlc = dev_to_hdlc(pvc->frad); |
370 | if (state(hdlc)->settings.lmi == LMI_NONE) | |
1da177e4 LT |
371 | pvc->state.active = 0; |
372 | ||
eb2a2fd9 KH |
373 | if (state(hdlc)->settings.dce) { |
374 | state(hdlc)->dce_changed = 1; | |
1da177e4 LT |
375 | pvc->state.active = 0; |
376 | } | |
377 | } | |
378 | return 0; | |
379 | } | |
380 | ||
381 | ||
382 | ||
7665a089 | 383 | static int pvc_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) |
1da177e4 | 384 | { |
3fadb06d | 385 | struct pvc_device *pvc = dev->ml_priv; |
1da177e4 LT |
386 | fr_proto_pvc_info info; |
387 | ||
388 | if (ifr->ifr_settings.type == IF_GET_PROTO) { | |
389 | if (dev->type == ARPHRD_ETHER) | |
390 | ifr->ifr_settings.type = IF_PROTO_FR_ETH_PVC; | |
391 | else | |
392 | ifr->ifr_settings.type = IF_PROTO_FR_PVC; | |
393 | ||
394 | if (ifr->ifr_settings.size < sizeof(info)) { | |
395 | /* data size wanted */ | |
396 | ifr->ifr_settings.size = sizeof(info); | |
397 | return -ENOBUFS; | |
398 | } | |
399 | ||
400 | info.dlci = pvc->dlci; | |
eb2a2fd9 | 401 | memcpy(info.master, pvc->frad->name, IFNAMSIZ); |
1da177e4 LT |
402 | if (copy_to_user(ifr->ifr_settings.ifs_ifsu.fr_pvc_info, |
403 | &info, sizeof(info))) | |
404 | return -EFAULT; | |
405 | return 0; | |
406 | } | |
407 | ||
408 | return -EINVAL; | |
409 | } | |
410 | ||
d71a6749 | 411 | static netdev_tx_t pvc_xmit(struct sk_buff *skb, struct net_device *dev) |
1da177e4 | 412 | { |
3fadb06d | 413 | struct pvc_device *pvc = dev->ml_priv; |
1da177e4 LT |
414 | |
415 | if (pvc->state.active) { | |
416 | if (dev->type == ARPHRD_ETHER) { | |
417 | int pad = ETH_ZLEN - skb->len; | |
418 | if (pad > 0) { /* Pad the frame with zeros */ | |
419 | int len = skb->len; | |
420 | if (skb_tailroom(skb) < pad) | |
421 | if (pskb_expand_head(skb, 0, pad, | |
422 | GFP_ATOMIC)) { | |
198191c4 | 423 | dev->stats.tx_dropped++; |
1da177e4 | 424 | dev_kfree_skb(skb); |
6ed10654 | 425 | return NETDEV_TX_OK; |
1da177e4 LT |
426 | } |
427 | skb_put(skb, pad); | |
428 | memset(skb->data + len, 0, pad); | |
429 | } | |
09640e63 | 430 | skb->protocol = cpu_to_be16(ETH_P_802_3); |
1da177e4 LT |
431 | } |
432 | if (!fr_hard_header(&skb, pvc->dlci)) { | |
198191c4 KH |
433 | dev->stats.tx_bytes += skb->len; |
434 | dev->stats.tx_packets++; | |
1da177e4 | 435 | if (pvc->state.fecn) /* TX Congestion counter */ |
198191c4 | 436 | dev->stats.tx_compressed++; |
eb2a2fd9 | 437 | skb->dev = pvc->frad; |
1da177e4 | 438 | dev_queue_xmit(skb); |
6ed10654 | 439 | return NETDEV_TX_OK; |
1da177e4 LT |
440 | } |
441 | } | |
442 | ||
198191c4 | 443 | dev->stats.tx_dropped++; |
1da177e4 | 444 | dev_kfree_skb(skb); |
6ed10654 | 445 | return NETDEV_TX_OK; |
1da177e4 LT |
446 | } |
447 | ||
3fadb06d | 448 | static inline void fr_log_dlci_active(struct pvc_device *pvc) |
1da177e4 | 449 | { |
12a3bfef JP |
450 | netdev_info(pvc->frad, "DLCI %d [%s%s%s]%s %s\n", |
451 | pvc->dlci, | |
452 | pvc->main ? pvc->main->name : "", | |
453 | pvc->main && pvc->ether ? " " : "", | |
454 | pvc->ether ? pvc->ether->name : "", | |
455 | pvc->state.new ? " new" : "", | |
456 | !pvc->state.exist ? "deleted" : | |
457 | pvc->state.active ? "active" : "inactive"); | |
1da177e4 LT |
458 | } |
459 | ||
460 | ||
461 | ||
462 | static inline u8 fr_lmi_nextseq(u8 x) | |
463 | { | |
464 | x++; | |
465 | return x ? x : 1; | |
466 | } | |
467 | ||
468 | ||
1da177e4 LT |
469 | static void fr_lmi_send(struct net_device *dev, int fullrep) |
470 | { | |
471 | hdlc_device *hdlc = dev_to_hdlc(dev); | |
472 | struct sk_buff *skb; | |
3fadb06d | 473 | struct pvc_device *pvc = state(hdlc)->first_pvc; |
eb2a2fd9 KH |
474 | int lmi = state(hdlc)->settings.lmi; |
475 | int dce = state(hdlc)->settings.dce; | |
b3dd65f9 KH |
476 | int len = lmi == LMI_ANSI ? LMI_ANSI_LENGTH : LMI_CCITT_CISCO_LENGTH; |
477 | int stat_len = (lmi == LMI_CISCO) ? 6 : 3; | |
1da177e4 LT |
478 | u8 *data; |
479 | int i = 0; | |
480 | ||
b3dd65f9 | 481 | if (dce && fullrep) { |
eb2a2fd9 | 482 | len += state(hdlc)->dce_pvc_count * (2 + stat_len); |
1da177e4 | 483 | if (len > HDLC_MAX_MRU) { |
12a3bfef | 484 | netdev_warn(dev, "Too many PVCs while sending LMI full report\n"); |
1da177e4 LT |
485 | return; |
486 | } | |
487 | } | |
488 | ||
489 | skb = dev_alloc_skb(len); | |
490 | if (!skb) { | |
12a3bfef | 491 | netdev_warn(dev, "Memory squeeze on fr_lmi_send()\n"); |
1da177e4 LT |
492 | return; |
493 | } | |
494 | memset(skb->data, 0, len); | |
495 | skb_reserve(skb, 4); | |
b3dd65f9 | 496 | if (lmi == LMI_CISCO) { |
09640e63 | 497 | skb->protocol = cpu_to_be16(NLPID_CISCO_LMI); |
b3dd65f9 KH |
498 | fr_hard_header(&skb, LMI_CISCO_DLCI); |
499 | } else { | |
09640e63 | 500 | skb->protocol = cpu_to_be16(NLPID_CCITT_ANSI_LMI); |
b3dd65f9 KH |
501 | fr_hard_header(&skb, LMI_CCITT_ANSI_DLCI); |
502 | } | |
27a884dc | 503 | data = skb_tail_pointer(skb); |
1da177e4 | 504 | data[i++] = LMI_CALLREF; |
b3dd65f9 KH |
505 | data[i++] = dce ? LMI_STATUS : LMI_STATUS_ENQUIRY; |
506 | if (lmi == LMI_ANSI) | |
1da177e4 | 507 | data[i++] = LMI_ANSI_LOCKSHIFT; |
b3dd65f9 KH |
508 | data[i++] = lmi == LMI_CCITT ? LMI_CCITT_REPTYPE : |
509 | LMI_ANSI_CISCO_REPTYPE; | |
1da177e4 LT |
510 | data[i++] = LMI_REPT_LEN; |
511 | data[i++] = fullrep ? LMI_FULLREP : LMI_INTEGRITY; | |
b3dd65f9 | 512 | data[i++] = lmi == LMI_CCITT ? LMI_CCITT_ALIVE : LMI_ANSI_CISCO_ALIVE; |
1da177e4 | 513 | data[i++] = LMI_INTEG_LEN; |
eb2a2fd9 KH |
514 | data[i++] = state(hdlc)->txseq = |
515 | fr_lmi_nextseq(state(hdlc)->txseq); | |
516 | data[i++] = state(hdlc)->rxseq; | |
1da177e4 | 517 | |
b3dd65f9 | 518 | if (dce && fullrep) { |
1da177e4 | 519 | while (pvc) { |
b3dd65f9 KH |
520 | data[i++] = lmi == LMI_CCITT ? LMI_CCITT_PVCSTAT : |
521 | LMI_ANSI_CISCO_PVCSTAT; | |
1da177e4 LT |
522 | data[i++] = stat_len; |
523 | ||
524 | /* LMI start/restart */ | |
eb2a2fd9 | 525 | if (state(hdlc)->reliable && !pvc->state.exist) { |
1da177e4 LT |
526 | pvc->state.exist = pvc->state.new = 1; |
527 | fr_log_dlci_active(pvc); | |
528 | } | |
529 | ||
530 | /* ifconfig PVC up */ | |
531 | if (pvc->open_count && !pvc->state.active && | |
532 | pvc->state.exist && !pvc->state.new) { | |
533 | pvc_carrier(1, pvc); | |
534 | pvc->state.active = 1; | |
535 | fr_log_dlci_active(pvc); | |
536 | } | |
537 | ||
b3dd65f9 KH |
538 | if (lmi == LMI_CISCO) { |
539 | data[i] = pvc->dlci >> 8; | |
540 | data[i + 1] = pvc->dlci & 0xFF; | |
541 | } else { | |
542 | data[i] = (pvc->dlci >> 4) & 0x3F; | |
543 | data[i + 1] = ((pvc->dlci << 3) & 0x78) | 0x80; | |
544 | data[i + 2] = 0x80; | |
545 | } | |
546 | ||
547 | if (pvc->state.new) | |
548 | data[i + 2] |= 0x08; | |
549 | else if (pvc->state.active) | |
550 | data[i + 2] |= 0x02; | |
551 | ||
1da177e4 LT |
552 | i += stat_len; |
553 | pvc = pvc->next; | |
554 | } | |
555 | } | |
556 | ||
557 | skb_put(skb, i); | |
558 | skb->priority = TC_PRIO_CONTROL; | |
559 | skb->dev = dev; | |
c1d2bbe1 | 560 | skb_reset_network_header(skb); |
1da177e4 LT |
561 | |
562 | dev_queue_xmit(skb); | |
563 | } | |
564 | ||
565 | ||
566 | ||
567 | static void fr_set_link_state(int reliable, struct net_device *dev) | |
568 | { | |
569 | hdlc_device *hdlc = dev_to_hdlc(dev); | |
3fadb06d | 570 | struct pvc_device *pvc = state(hdlc)->first_pvc; |
1da177e4 | 571 | |
eb2a2fd9 | 572 | state(hdlc)->reliable = reliable; |
1da177e4 | 573 | if (reliable) { |
c2ce9204 | 574 | netif_dormant_off(dev); |
eb2a2fd9 KH |
575 | state(hdlc)->n391cnt = 0; /* Request full status */ |
576 | state(hdlc)->dce_changed = 1; | |
1da177e4 | 577 | |
eb2a2fd9 | 578 | if (state(hdlc)->settings.lmi == LMI_NONE) { |
1da177e4 LT |
579 | while (pvc) { /* Activate all PVCs */ |
580 | pvc_carrier(1, pvc); | |
581 | pvc->state.exist = pvc->state.active = 1; | |
582 | pvc->state.new = 0; | |
583 | pvc = pvc->next; | |
584 | } | |
585 | } | |
586 | } else { | |
c2ce9204 | 587 | netif_dormant_on(dev); |
1da177e4 LT |
588 | while (pvc) { /* Deactivate all PVCs */ |
589 | pvc_carrier(0, pvc); | |
590 | pvc->state.exist = pvc->state.active = 0; | |
591 | pvc->state.new = 0; | |
eb2a2fd9 | 592 | if (!state(hdlc)->settings.dce) |
b3dd65f9 | 593 | pvc->state.bandwidth = 0; |
1da177e4 LT |
594 | pvc = pvc->next; |
595 | } | |
596 | } | |
597 | } | |
598 | ||
599 | ||
1da177e4 LT |
600 | static void fr_timer(unsigned long arg) |
601 | { | |
602 | struct net_device *dev = (struct net_device *)arg; | |
603 | hdlc_device *hdlc = dev_to_hdlc(dev); | |
604 | int i, cnt = 0, reliable; | |
605 | u32 list; | |
606 | ||
eb2a2fd9 KH |
607 | if (state(hdlc)->settings.dce) { |
608 | reliable = state(hdlc)->request && | |
609 | time_before(jiffies, state(hdlc)->last_poll + | |
610 | state(hdlc)->settings.t392 * HZ); | |
611 | state(hdlc)->request = 0; | |
b3dd65f9 | 612 | } else { |
eb2a2fd9 KH |
613 | state(hdlc)->last_errors <<= 1; /* Shift the list */ |
614 | if (state(hdlc)->request) { | |
615 | if (state(hdlc)->reliable) | |
12a3bfef | 616 | netdev_info(dev, "No LMI status reply received\n"); |
eb2a2fd9 | 617 | state(hdlc)->last_errors |= 1; |
1da177e4 LT |
618 | } |
619 | ||
eb2a2fd9 KH |
620 | list = state(hdlc)->last_errors; |
621 | for (i = 0; i < state(hdlc)->settings.n393; i++, list >>= 1) | |
1da177e4 LT |
622 | cnt += (list & 1); /* errors count */ |
623 | ||
eb2a2fd9 | 624 | reliable = (cnt < state(hdlc)->settings.n392); |
1da177e4 LT |
625 | } |
626 | ||
eb2a2fd9 | 627 | if (state(hdlc)->reliable != reliable) { |
12a3bfef | 628 | netdev_info(dev, "Link %sreliable\n", reliable ? "" : "un"); |
1da177e4 LT |
629 | fr_set_link_state(reliable, dev); |
630 | } | |
631 | ||
eb2a2fd9 KH |
632 | if (state(hdlc)->settings.dce) |
633 | state(hdlc)->timer.expires = jiffies + | |
634 | state(hdlc)->settings.t392 * HZ; | |
1da177e4 | 635 | else { |
eb2a2fd9 KH |
636 | if (state(hdlc)->n391cnt) |
637 | state(hdlc)->n391cnt--; | |
1da177e4 | 638 | |
eb2a2fd9 | 639 | fr_lmi_send(dev, state(hdlc)->n391cnt == 0); |
1da177e4 | 640 | |
eb2a2fd9 KH |
641 | state(hdlc)->last_poll = jiffies; |
642 | state(hdlc)->request = 1; | |
643 | state(hdlc)->timer.expires = jiffies + | |
644 | state(hdlc)->settings.t391 * HZ; | |
1da177e4 LT |
645 | } |
646 | ||
eb2a2fd9 KH |
647 | state(hdlc)->timer.function = fr_timer; |
648 | state(hdlc)->timer.data = arg; | |
649 | add_timer(&state(hdlc)->timer); | |
1da177e4 LT |
650 | } |
651 | ||
652 | ||
1da177e4 LT |
653 | static int fr_lmi_recv(struct net_device *dev, struct sk_buff *skb) |
654 | { | |
655 | hdlc_device *hdlc = dev_to_hdlc(dev); | |
3fadb06d | 656 | struct pvc_device *pvc; |
1da177e4 | 657 | u8 rxseq, txseq; |
eb2a2fd9 KH |
658 | int lmi = state(hdlc)->settings.lmi; |
659 | int dce = state(hdlc)->settings.dce; | |
b3dd65f9 | 660 | int stat_len = (lmi == LMI_CISCO) ? 6 : 3, reptype, error, no_ram, i; |
1da177e4 | 661 | |
b3dd65f9 KH |
662 | if (skb->len < (lmi == LMI_ANSI ? LMI_ANSI_LENGTH : |
663 | LMI_CCITT_CISCO_LENGTH)) { | |
12a3bfef | 664 | netdev_info(dev, "Short LMI frame\n"); |
1da177e4 LT |
665 | return 1; |
666 | } | |
667 | ||
b3dd65f9 KH |
668 | if (skb->data[3] != (lmi == LMI_CISCO ? NLPID_CISCO_LMI : |
669 | NLPID_CCITT_ANSI_LMI)) { | |
12a3bfef | 670 | netdev_info(dev, "Received non-LMI frame with LMI DLCI\n"); |
b3dd65f9 KH |
671 | return 1; |
672 | } | |
673 | ||
674 | if (skb->data[4] != LMI_CALLREF) { | |
12a3bfef JP |
675 | netdev_info(dev, "Invalid LMI Call reference (0x%02X)\n", |
676 | skb->data[4]); | |
b3dd65f9 KH |
677 | return 1; |
678 | } | |
679 | ||
680 | if (skb->data[5] != (dce ? LMI_STATUS_ENQUIRY : LMI_STATUS)) { | |
12a3bfef JP |
681 | netdev_info(dev, "Invalid LMI Message type (0x%02X)\n", |
682 | skb->data[5]); | |
1da177e4 LT |
683 | return 1; |
684 | } | |
685 | ||
b3dd65f9 KH |
686 | if (lmi == LMI_ANSI) { |
687 | if (skb->data[6] != LMI_ANSI_LOCKSHIFT) { | |
12a3bfef JP |
688 | netdev_info(dev, "Not ANSI locking shift in LMI message (0x%02X)\n", |
689 | skb->data[6]); | |
b3dd65f9 KH |
690 | return 1; |
691 | } | |
692 | i = 7; | |
693 | } else | |
694 | i = 6; | |
1da177e4 | 695 | |
b3dd65f9 KH |
696 | if (skb->data[i] != (lmi == LMI_CCITT ? LMI_CCITT_REPTYPE : |
697 | LMI_ANSI_CISCO_REPTYPE)) { | |
12a3bfef JP |
698 | netdev_info(dev, "Not an LMI Report type IE (0x%02X)\n", |
699 | skb->data[i]); | |
1da177e4 LT |
700 | return 1; |
701 | } | |
1da177e4 | 702 | |
b3dd65f9 | 703 | if (skb->data[++i] != LMI_REPT_LEN) { |
12a3bfef JP |
704 | netdev_info(dev, "Invalid LMI Report type IE length (%u)\n", |
705 | skb->data[i]); | |
b3dd65f9 KH |
706 | return 1; |
707 | } | |
1da177e4 | 708 | |
b3dd65f9 KH |
709 | reptype = skb->data[++i]; |
710 | if (reptype != LMI_INTEGRITY && reptype != LMI_FULLREP) { | |
12a3bfef JP |
711 | netdev_info(dev, "Unsupported LMI Report type (0x%02X)\n", |
712 | reptype); | |
b3dd65f9 KH |
713 | return 1; |
714 | } | |
1da177e4 | 715 | |
b3dd65f9 KH |
716 | if (skb->data[++i] != (lmi == LMI_CCITT ? LMI_CCITT_ALIVE : |
717 | LMI_ANSI_CISCO_ALIVE)) { | |
12a3bfef JP |
718 | netdev_info(dev, "Not an LMI Link integrity verification IE (0x%02X)\n", |
719 | skb->data[i]); | |
1da177e4 LT |
720 | return 1; |
721 | } | |
1da177e4 | 722 | |
b3dd65f9 | 723 | if (skb->data[++i] != LMI_INTEG_LEN) { |
12a3bfef JP |
724 | netdev_info(dev, "Invalid LMI Link integrity verification IE length (%u)\n", |
725 | skb->data[i]); | |
b3dd65f9 KH |
726 | return 1; |
727 | } | |
728 | i++; | |
1da177e4 | 729 | |
eb2a2fd9 | 730 | state(hdlc)->rxseq = skb->data[i++]; /* TX sequence from peer */ |
1da177e4 LT |
731 | rxseq = skb->data[i++]; /* Should confirm our sequence */ |
732 | ||
eb2a2fd9 | 733 | txseq = state(hdlc)->txseq; |
1da177e4 | 734 | |
b3dd65f9 | 735 | if (dce) |
eb2a2fd9 | 736 | state(hdlc)->last_poll = jiffies; |
1da177e4 LT |
737 | |
738 | error = 0; | |
eb2a2fd9 | 739 | if (!state(hdlc)->reliable) |
1da177e4 LT |
740 | error = 1; |
741 | ||
eb2a2fd9 KH |
742 | if (rxseq == 0 || rxseq != txseq) { /* Ask for full report next time */ |
743 | state(hdlc)->n391cnt = 0; | |
1da177e4 LT |
744 | error = 1; |
745 | } | |
746 | ||
b3dd65f9 | 747 | if (dce) { |
eb2a2fd9 | 748 | if (state(hdlc)->fullrep_sent && !error) { |
1da177e4 | 749 | /* Stop sending full report - the last one has been confirmed by DTE */ |
eb2a2fd9 KH |
750 | state(hdlc)->fullrep_sent = 0; |
751 | pvc = state(hdlc)->first_pvc; | |
1da177e4 LT |
752 | while (pvc) { |
753 | if (pvc->state.new) { | |
754 | pvc->state.new = 0; | |
755 | ||
756 | /* Tell DTE that new PVC is now active */ | |
eb2a2fd9 | 757 | state(hdlc)->dce_changed = 1; |
1da177e4 LT |
758 | } |
759 | pvc = pvc->next; | |
760 | } | |
761 | } | |
762 | ||
eb2a2fd9 | 763 | if (state(hdlc)->dce_changed) { |
1da177e4 | 764 | reptype = LMI_FULLREP; |
eb2a2fd9 KH |
765 | state(hdlc)->fullrep_sent = 1; |
766 | state(hdlc)->dce_changed = 0; | |
1da177e4 LT |
767 | } |
768 | ||
eb2a2fd9 | 769 | state(hdlc)->request = 1; /* got request */ |
1da177e4 LT |
770 | fr_lmi_send(dev, reptype == LMI_FULLREP ? 1 : 0); |
771 | return 0; | |
772 | } | |
773 | ||
774 | /* DTE */ | |
775 | ||
eb2a2fd9 | 776 | state(hdlc)->request = 0; /* got response, no request pending */ |
1da177e4 LT |
777 | |
778 | if (error) | |
779 | return 0; | |
780 | ||
781 | if (reptype != LMI_FULLREP) | |
782 | return 0; | |
783 | ||
eb2a2fd9 | 784 | pvc = state(hdlc)->first_pvc; |
1da177e4 LT |
785 | |
786 | while (pvc) { | |
787 | pvc->state.deleted = 1; | |
788 | pvc = pvc->next; | |
789 | } | |
790 | ||
791 | no_ram = 0; | |
792 | while (skb->len >= i + 2 + stat_len) { | |
793 | u16 dlci; | |
b3dd65f9 | 794 | u32 bw; |
1da177e4 LT |
795 | unsigned int active, new; |
796 | ||
b3dd65f9 KH |
797 | if (skb->data[i] != (lmi == LMI_CCITT ? LMI_CCITT_PVCSTAT : |
798 | LMI_ANSI_CISCO_PVCSTAT)) { | |
12a3bfef JP |
799 | netdev_info(dev, "Not an LMI PVC status IE (0x%02X)\n", |
800 | skb->data[i]); | |
1da177e4 LT |
801 | return 1; |
802 | } | |
1da177e4 | 803 | |
b3dd65f9 | 804 | if (skb->data[++i] != stat_len) { |
12a3bfef JP |
805 | netdev_info(dev, "Invalid LMI PVC status IE length (%u)\n", |
806 | skb->data[i]); | |
1da177e4 LT |
807 | return 1; |
808 | } | |
809 | i++; | |
810 | ||
b3dd65f9 KH |
811 | new = !! (skb->data[i + 2] & 0x08); |
812 | active = !! (skb->data[i + 2] & 0x02); | |
813 | if (lmi == LMI_CISCO) { | |
814 | dlci = (skb->data[i] << 8) | skb->data[i + 1]; | |
815 | bw = (skb->data[i + 3] << 16) | | |
816 | (skb->data[i + 4] << 8) | | |
817 | (skb->data[i + 5]); | |
818 | } else { | |
819 | dlci = ((skb->data[i] & 0x3F) << 4) | | |
820 | ((skb->data[i + 1] & 0x78) >> 3); | |
821 | bw = 0; | |
822 | } | |
1da177e4 LT |
823 | |
824 | pvc = add_pvc(dev, dlci); | |
825 | ||
826 | if (!pvc && !no_ram) { | |
12a3bfef | 827 | netdev_warn(dev, "Memory squeeze on fr_lmi_recv()\n"); |
1da177e4 LT |
828 | no_ram = 1; |
829 | } | |
830 | ||
831 | if (pvc) { | |
832 | pvc->state.exist = 1; | |
833 | pvc->state.deleted = 0; | |
834 | if (active != pvc->state.active || | |
835 | new != pvc->state.new || | |
b3dd65f9 | 836 | bw != pvc->state.bandwidth || |
1da177e4 LT |
837 | !pvc->state.exist) { |
838 | pvc->state.new = new; | |
839 | pvc->state.active = active; | |
b3dd65f9 | 840 | pvc->state.bandwidth = bw; |
1da177e4 LT |
841 | pvc_carrier(active, pvc); |
842 | fr_log_dlci_active(pvc); | |
843 | } | |
844 | } | |
845 | ||
846 | i += stat_len; | |
847 | } | |
848 | ||
eb2a2fd9 | 849 | pvc = state(hdlc)->first_pvc; |
1da177e4 LT |
850 | |
851 | while (pvc) { | |
852 | if (pvc->state.deleted && pvc->state.exist) { | |
853 | pvc_carrier(0, pvc); | |
854 | pvc->state.active = pvc->state.new = 0; | |
855 | pvc->state.exist = 0; | |
b3dd65f9 | 856 | pvc->state.bandwidth = 0; |
1da177e4 LT |
857 | fr_log_dlci_active(pvc); |
858 | } | |
859 | pvc = pvc->next; | |
860 | } | |
861 | ||
862 | /* Next full report after N391 polls */ | |
eb2a2fd9 | 863 | state(hdlc)->n391cnt = state(hdlc)->settings.n391; |
1da177e4 LT |
864 | |
865 | return 0; | |
866 | } | |
867 | ||
868 | ||
1da177e4 LT |
869 | static int fr_rx(struct sk_buff *skb) |
870 | { | |
eb2a2fd9 KH |
871 | struct net_device *frad = skb->dev; |
872 | hdlc_device *hdlc = dev_to_hdlc(frad); | |
3fadb06d | 873 | struct fr_hdr *fh = (struct fr_hdr *)skb->data; |
1da177e4 LT |
874 | u8 *data = skb->data; |
875 | u16 dlci; | |
3fadb06d | 876 | struct pvc_device *pvc; |
1da177e4 LT |
877 | struct net_device *dev = NULL; |
878 | ||
879 | if (skb->len <= 4 || fh->ea1 || data[2] != FR_UI) | |
880 | goto rx_error; | |
881 | ||
882 | dlci = q922_to_dlci(skb->data); | |
883 | ||
b3dd65f9 | 884 | if ((dlci == LMI_CCITT_ANSI_DLCI && |
eb2a2fd9 KH |
885 | (state(hdlc)->settings.lmi == LMI_ANSI || |
886 | state(hdlc)->settings.lmi == LMI_CCITT)) || | |
b3dd65f9 | 887 | (dlci == LMI_CISCO_DLCI && |
eb2a2fd9 KH |
888 | state(hdlc)->settings.lmi == LMI_CISCO)) { |
889 | if (fr_lmi_recv(frad, skb)) | |
b3dd65f9 KH |
890 | goto rx_error; |
891 | dev_kfree_skb_any(skb); | |
892 | return NET_RX_SUCCESS; | |
1da177e4 LT |
893 | } |
894 | ||
895 | pvc = find_pvc(hdlc, dlci); | |
896 | if (!pvc) { | |
897 | #ifdef DEBUG_PKT | |
12a3bfef JP |
898 | netdev_info(frad, "No PVC for received frame's DLCI %d\n", |
899 | dlci); | |
1da177e4 LT |
900 | #endif |
901 | dev_kfree_skb_any(skb); | |
902 | return NET_RX_DROP; | |
903 | } | |
904 | ||
905 | if (pvc->state.fecn != fh->fecn) { | |
906 | #ifdef DEBUG_ECN | |
eb2a2fd9 | 907 | printk(KERN_DEBUG "%s: DLCI %d FECN O%s\n", frad->name, |
1da177e4 LT |
908 | dlci, fh->fecn ? "N" : "FF"); |
909 | #endif | |
910 | pvc->state.fecn ^= 1; | |
911 | } | |
912 | ||
913 | if (pvc->state.becn != fh->becn) { | |
914 | #ifdef DEBUG_ECN | |
eb2a2fd9 | 915 | printk(KERN_DEBUG "%s: DLCI %d BECN O%s\n", frad->name, |
1da177e4 LT |
916 | dlci, fh->becn ? "N" : "FF"); |
917 | #endif | |
918 | pvc->state.becn ^= 1; | |
919 | } | |
920 | ||
921 | ||
922 | if ((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL) { | |
198191c4 | 923 | frad->stats.rx_dropped++; |
1da177e4 LT |
924 | return NET_RX_DROP; |
925 | } | |
926 | ||
927 | if (data[3] == NLPID_IP) { | |
928 | skb_pull(skb, 4); /* Remove 4-byte header (hdr, UI, NLPID) */ | |
929 | dev = pvc->main; | |
930 | skb->protocol = htons(ETH_P_IP); | |
931 | ||
932 | } else if (data[3] == NLPID_IPV6) { | |
933 | skb_pull(skb, 4); /* Remove 4-byte header (hdr, UI, NLPID) */ | |
934 | dev = pvc->main; | |
935 | skb->protocol = htons(ETH_P_IPV6); | |
936 | ||
937 | } else if (skb->len > 10 && data[3] == FR_PAD && | |
938 | data[4] == NLPID_SNAP && data[5] == FR_PAD) { | |
abf17ffd KH |
939 | u16 oui = ntohs(*(__be16*)(data + 6)); |
940 | u16 pid = ntohs(*(__be16*)(data + 8)); | |
1da177e4 LT |
941 | skb_pull(skb, 10); |
942 | ||
943 | switch ((((u32)oui) << 16) | pid) { | |
944 | case ETH_P_ARP: /* routed frame with SNAP */ | |
945 | case ETH_P_IPX: | |
946 | case ETH_P_IP: /* a long variant */ | |
947 | case ETH_P_IPV6: | |
948 | dev = pvc->main; | |
949 | skb->protocol = htons(pid); | |
950 | break; | |
951 | ||
952 | case 0x80C20007: /* bridged Ethernet frame */ | |
953 | if ((dev = pvc->ether) != NULL) | |
954 | skb->protocol = eth_type_trans(skb, dev); | |
955 | break; | |
956 | ||
957 | default: | |
12a3bfef JP |
958 | netdev_info(frad, "Unsupported protocol, OUI=%x PID=%x\n", |
959 | oui, pid); | |
1da177e4 LT |
960 | dev_kfree_skb_any(skb); |
961 | return NET_RX_DROP; | |
962 | } | |
963 | } else { | |
12a3bfef JP |
964 | netdev_info(frad, "Unsupported protocol, NLPID=%x length=%i\n", |
965 | data[3], skb->len); | |
1da177e4 LT |
966 | dev_kfree_skb_any(skb); |
967 | return NET_RX_DROP; | |
968 | } | |
969 | ||
970 | if (dev) { | |
198191c4 KH |
971 | dev->stats.rx_packets++; /* PVC traffic */ |
972 | dev->stats.rx_bytes += skb->len; | |
1da177e4 | 973 | if (pvc->state.becn) |
198191c4 | 974 | dev->stats.rx_compressed++; |
54364b75 | 975 | skb->dev = dev; |
1da177e4 LT |
976 | netif_rx(skb); |
977 | return NET_RX_SUCCESS; | |
978 | } else { | |
979 | dev_kfree_skb_any(skb); | |
980 | return NET_RX_DROP; | |
981 | } | |
982 | ||
983 | rx_error: | |
198191c4 | 984 | frad->stats.rx_errors++; /* Mark error */ |
1da177e4 LT |
985 | dev_kfree_skb_any(skb); |
986 | return NET_RX_DROP; | |
987 | } | |
988 | ||
989 | ||
990 | ||
991 | static void fr_start(struct net_device *dev) | |
992 | { | |
993 | hdlc_device *hdlc = dev_to_hdlc(dev); | |
994 | #ifdef DEBUG_LINK | |
995 | printk(KERN_DEBUG "fr_start\n"); | |
996 | #endif | |
eb2a2fd9 KH |
997 | if (state(hdlc)->settings.lmi != LMI_NONE) { |
998 | state(hdlc)->reliable = 0; | |
999 | state(hdlc)->dce_changed = 1; | |
1000 | state(hdlc)->request = 0; | |
1001 | state(hdlc)->fullrep_sent = 0; | |
1002 | state(hdlc)->last_errors = 0xFFFFFFFF; | |
1003 | state(hdlc)->n391cnt = 0; | |
1004 | state(hdlc)->txseq = state(hdlc)->rxseq = 0; | |
1005 | ||
1006 | init_timer(&state(hdlc)->timer); | |
1da177e4 | 1007 | /* First poll after 1 s */ |
eb2a2fd9 KH |
1008 | state(hdlc)->timer.expires = jiffies + HZ; |
1009 | state(hdlc)->timer.function = fr_timer; | |
1010 | state(hdlc)->timer.data = (unsigned long)dev; | |
1011 | add_timer(&state(hdlc)->timer); | |
1da177e4 LT |
1012 | } else |
1013 | fr_set_link_state(1, dev); | |
1014 | } | |
1015 | ||
1016 | ||
1da177e4 LT |
1017 | static void fr_stop(struct net_device *dev) |
1018 | { | |
1019 | hdlc_device *hdlc = dev_to_hdlc(dev); | |
1020 | #ifdef DEBUG_LINK | |
1021 | printk(KERN_DEBUG "fr_stop\n"); | |
1022 | #endif | |
eb2a2fd9 KH |
1023 | if (state(hdlc)->settings.lmi != LMI_NONE) |
1024 | del_timer_sync(&state(hdlc)->timer); | |
1da177e4 LT |
1025 | fr_set_link_state(0, dev); |
1026 | } | |
1027 | ||
1028 | ||
1da177e4 LT |
1029 | static void fr_close(struct net_device *dev) |
1030 | { | |
1031 | hdlc_device *hdlc = dev_to_hdlc(dev); | |
3fadb06d | 1032 | struct pvc_device *pvc = state(hdlc)->first_pvc; |
1da177e4 LT |
1033 | |
1034 | while (pvc) { /* Shutdown all PVCs for this FRAD */ | |
1035 | if (pvc->main) | |
1036 | dev_close(pvc->main); | |
1037 | if (pvc->ether) | |
1038 | dev_close(pvc->ether); | |
1039 | pvc = pvc->next; | |
1040 | } | |
1041 | } | |
1042 | ||
eb2a2fd9 KH |
1043 | |
1044 | static void pvc_setup(struct net_device *dev) | |
1da177e4 LT |
1045 | { |
1046 | dev->type = ARPHRD_DLCI; | |
1047 | dev->flags = IFF_POINTOPOINT; | |
1048 | dev->hard_header_len = 10; | |
1049 | dev->addr_len = 2; | |
02875878 | 1050 | netif_keep_dst(dev); |
1da177e4 LT |
1051 | } |
1052 | ||
991990a1 KH |
1053 | static const struct net_device_ops pvc_ops = { |
1054 | .ndo_open = pvc_open, | |
1055 | .ndo_stop = pvc_close, | |
1056 | .ndo_change_mtu = hdlc_change_mtu, | |
1057 | .ndo_start_xmit = pvc_xmit, | |
1058 | .ndo_do_ioctl = pvc_ioctl, | |
1059 | }; | |
1060 | ||
eb2a2fd9 | 1061 | static int fr_add_pvc(struct net_device *frad, unsigned int dlci, int type) |
1da177e4 | 1062 | { |
eb2a2fd9 | 1063 | hdlc_device *hdlc = dev_to_hdlc(frad); |
3fadb06d | 1064 | struct pvc_device *pvc; |
1da177e4 | 1065 | struct net_device *dev; |
1c5cae81 | 1066 | int used; |
1da177e4 | 1067 | |
eb2a2fd9 | 1068 | if ((pvc = add_pvc(frad, dlci)) == NULL) { |
12a3bfef | 1069 | netdev_warn(frad, "Memory squeeze on fr_add_pvc()\n"); |
1da177e4 LT |
1070 | return -ENOBUFS; |
1071 | } | |
1072 | ||
1073 | if (*get_dev_p(pvc, type)) | |
1074 | return -EEXIST; | |
1075 | ||
1076 | used = pvc_is_used(pvc); | |
1077 | ||
52d17851 | 1078 | if (type == ARPHRD_ETHER) |
c835a677 TG |
1079 | dev = alloc_netdev(0, "pvceth%d", NET_NAME_UNKNOWN, |
1080 | ether_setup); | |
52d17851 | 1081 | else |
c835a677 | 1082 | dev = alloc_netdev(0, "pvc%d", NET_NAME_UNKNOWN, pvc_setup); |
1da177e4 LT |
1083 | |
1084 | if (!dev) { | |
12a3bfef | 1085 | netdev_warn(frad, "Memory squeeze on fr_pvc()\n"); |
1da177e4 LT |
1086 | delete_unused_pvcs(hdlc); |
1087 | return -ENOBUFS; | |
1088 | } | |
1089 | ||
52d17851 | 1090 | if (type == ARPHRD_ETHER) { |
1091 | dev->priv_flags &= ~IFF_TX_SKB_SHARING; | |
f2cedb63 | 1092 | eth_hw_addr_random(dev); |
52d17851 | 1093 | } else { |
abf17ffd | 1094 | *(__be16*)dev->dev_addr = htons(dlci); |
1da177e4 LT |
1095 | dlci_to_q922(dev->broadcast, dlci); |
1096 | } | |
991990a1 | 1097 | dev->netdev_ops = &pvc_ops; |
1da177e4 | 1098 | dev->mtu = HDLC_MAX_MTU; |
4676a152 | 1099 | dev->priv_flags |= IFF_NO_QUEUE; |
2baf8a2d | 1100 | dev->ml_priv = pvc; |
1da177e4 | 1101 | |
1da177e4 LT |
1102 | if (register_netdevice(dev) != 0) { |
1103 | free_netdev(dev); | |
1104 | delete_unused_pvcs(hdlc); | |
1105 | return -EIO; | |
1106 | } | |
1107 | ||
1108 | dev->destructor = free_netdev; | |
1109 | *get_dev_p(pvc, type) = dev; | |
1110 | if (!used) { | |
eb2a2fd9 KH |
1111 | state(hdlc)->dce_changed = 1; |
1112 | state(hdlc)->dce_pvc_count++; | |
1da177e4 LT |
1113 | } |
1114 | return 0; | |
1115 | } | |
1116 | ||
1117 | ||
1118 | ||
1119 | static int fr_del_pvc(hdlc_device *hdlc, unsigned int dlci, int type) | |
1120 | { | |
3fadb06d | 1121 | struct pvc_device *pvc; |
1da177e4 LT |
1122 | struct net_device *dev; |
1123 | ||
1124 | if ((pvc = find_pvc(hdlc, dlci)) == NULL) | |
1125 | return -ENOENT; | |
1126 | ||
1127 | if ((dev = *get_dev_p(pvc, type)) == NULL) | |
1128 | return -ENOENT; | |
1129 | ||
1130 | if (dev->flags & IFF_UP) | |
1131 | return -EBUSY; /* PVC in use */ | |
1132 | ||
1133 | unregister_netdevice(dev); /* the destructor will free_netdev(dev) */ | |
1134 | *get_dev_p(pvc, type) = NULL; | |
1135 | ||
1136 | if (!pvc_is_used(pvc)) { | |
eb2a2fd9 KH |
1137 | state(hdlc)->dce_pvc_count--; |
1138 | state(hdlc)->dce_changed = 1; | |
1da177e4 LT |
1139 | } |
1140 | delete_unused_pvcs(hdlc); | |
1141 | return 0; | |
1142 | } | |
1143 | ||
1144 | ||
1145 | ||
eb2a2fd9 | 1146 | static void fr_destroy(struct net_device *frad) |
1da177e4 | 1147 | { |
eb2a2fd9 | 1148 | hdlc_device *hdlc = dev_to_hdlc(frad); |
3fadb06d | 1149 | struct pvc_device *pvc = state(hdlc)->first_pvc; |
eb2a2fd9 KH |
1150 | state(hdlc)->first_pvc = NULL; /* All PVCs destroyed */ |
1151 | state(hdlc)->dce_pvc_count = 0; | |
1152 | state(hdlc)->dce_changed = 1; | |
1da177e4 LT |
1153 | |
1154 | while (pvc) { | |
3fadb06d | 1155 | struct pvc_device *next = pvc->next; |
1da177e4 LT |
1156 | /* destructors will free_netdev() main and ether */ |
1157 | if (pvc->main) | |
1158 | unregister_netdevice(pvc->main); | |
1159 | ||
1160 | if (pvc->ether) | |
1161 | unregister_netdevice(pvc->ether); | |
1162 | ||
1163 | kfree(pvc); | |
1164 | pvc = next; | |
1165 | } | |
1166 | } | |
1167 | ||
1168 | ||
eb2a2fd9 KH |
1169 | static struct hdlc_proto proto = { |
1170 | .close = fr_close, | |
1171 | .start = fr_start, | |
1172 | .stop = fr_stop, | |
1173 | .detach = fr_destroy, | |
1174 | .ioctl = fr_ioctl, | |
40d25142 | 1175 | .netif_rx = fr_rx, |
eb2a2fd9 KH |
1176 | .module = THIS_MODULE, |
1177 | }; | |
1178 | ||
1da177e4 | 1179 | |
eb2a2fd9 | 1180 | static int fr_ioctl(struct net_device *dev, struct ifreq *ifr) |
1da177e4 LT |
1181 | { |
1182 | fr_proto __user *fr_s = ifr->ifr_settings.ifs_ifsu.fr; | |
1183 | const size_t size = sizeof(fr_proto); | |
1184 | fr_proto new_settings; | |
1185 | hdlc_device *hdlc = dev_to_hdlc(dev); | |
1186 | fr_proto_pvc pvc; | |
1187 | int result; | |
1188 | ||
1189 | switch (ifr->ifr_settings.type) { | |
1190 | case IF_GET_PROTO: | |
eb2a2fd9 KH |
1191 | if (dev_to_hdlc(dev)->proto != &proto) /* Different proto */ |
1192 | return -EINVAL; | |
1da177e4 LT |
1193 | ifr->ifr_settings.type = IF_PROTO_FR; |
1194 | if (ifr->ifr_settings.size < size) { | |
1195 | ifr->ifr_settings.size = size; /* data size wanted */ | |
1196 | return -ENOBUFS; | |
1197 | } | |
eb2a2fd9 | 1198 | if (copy_to_user(fr_s, &state(hdlc)->settings, size)) |
1da177e4 LT |
1199 | return -EFAULT; |
1200 | return 0; | |
1201 | ||
1202 | case IF_PROTO_FR: | |
6f7ad1e3 | 1203 | if (!capable(CAP_NET_ADMIN)) |
1da177e4 LT |
1204 | return -EPERM; |
1205 | ||
6f7ad1e3 | 1206 | if (dev->flags & IFF_UP) |
1da177e4 LT |
1207 | return -EBUSY; |
1208 | ||
1209 | if (copy_from_user(&new_settings, fr_s, size)) | |
1210 | return -EFAULT; | |
1211 | ||
1212 | if (new_settings.lmi == LMI_DEFAULT) | |
1213 | new_settings.lmi = LMI_ANSI; | |
1214 | ||
1215 | if ((new_settings.lmi != LMI_NONE && | |
1216 | new_settings.lmi != LMI_ANSI && | |
b3dd65f9 KH |
1217 | new_settings.lmi != LMI_CCITT && |
1218 | new_settings.lmi != LMI_CISCO) || | |
1da177e4 LT |
1219 | new_settings.t391 < 1 || |
1220 | new_settings.t392 < 2 || | |
1221 | new_settings.n391 < 1 || | |
1222 | new_settings.n392 < 1 || | |
1223 | new_settings.n393 < new_settings.n392 || | |
1224 | new_settings.n393 > 32 || | |
1225 | (new_settings.dce != 0 && | |
1226 | new_settings.dce != 1)) | |
1227 | return -EINVAL; | |
1228 | ||
1229 | result=hdlc->attach(dev, ENCODING_NRZ,PARITY_CRC16_PR1_CCITT); | |
1230 | if (result) | |
1231 | return result; | |
1232 | ||
eb2a2fd9 | 1233 | if (dev_to_hdlc(dev)->proto != &proto) { /* Different proto */ |
40d25142 | 1234 | result = attach_hdlc_protocol(dev, &proto, |
eb2a2fd9 KH |
1235 | sizeof(struct frad_state)); |
1236 | if (result) | |
1237 | return result; | |
1238 | state(hdlc)->first_pvc = NULL; | |
1239 | state(hdlc)->dce_pvc_count = 0; | |
1da177e4 | 1240 | } |
eb2a2fd9 | 1241 | memcpy(&state(hdlc)->settings, &new_settings, size); |
1da177e4 | 1242 | dev->type = ARPHRD_FRAD; |
2f8364a2 | 1243 | call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev); |
1da177e4 LT |
1244 | return 0; |
1245 | ||
1246 | case IF_PROTO_FR_ADD_PVC: | |
1247 | case IF_PROTO_FR_DEL_PVC: | |
1248 | case IF_PROTO_FR_ADD_ETH_PVC: | |
1249 | case IF_PROTO_FR_DEL_ETH_PVC: | |
eb2a2fd9 KH |
1250 | if (dev_to_hdlc(dev)->proto != &proto) /* Different proto */ |
1251 | return -EINVAL; | |
1252 | ||
6f7ad1e3 | 1253 | if (!capable(CAP_NET_ADMIN)) |
1da177e4 LT |
1254 | return -EPERM; |
1255 | ||
1256 | if (copy_from_user(&pvc, ifr->ifr_settings.ifs_ifsu.fr_pvc, | |
1257 | sizeof(fr_proto_pvc))) | |
1258 | return -EFAULT; | |
1259 | ||
1260 | if (pvc.dlci <= 0 || pvc.dlci >= 1024) | |
1261 | return -EINVAL; /* Only 10 bits, DLCI 0 reserved */ | |
1262 | ||
1263 | if (ifr->ifr_settings.type == IF_PROTO_FR_ADD_ETH_PVC || | |
1264 | ifr->ifr_settings.type == IF_PROTO_FR_DEL_ETH_PVC) | |
1265 | result = ARPHRD_ETHER; /* bridged Ethernet device */ | |
1266 | else | |
1267 | result = ARPHRD_DLCI; | |
1268 | ||
1269 | if (ifr->ifr_settings.type == IF_PROTO_FR_ADD_PVC || | |
1270 | ifr->ifr_settings.type == IF_PROTO_FR_ADD_ETH_PVC) | |
1271 | return fr_add_pvc(dev, pvc.dlci, result); | |
1272 | else | |
1273 | return fr_del_pvc(hdlc, pvc.dlci, result); | |
1274 | } | |
1275 | ||
1276 | return -EINVAL; | |
1277 | } | |
eb2a2fd9 KH |
1278 | |
1279 | ||
1280 | static int __init mod_init(void) | |
1281 | { | |
1282 | register_hdlc_protocol(&proto); | |
1283 | return 0; | |
1284 | } | |
1285 | ||
1286 | ||
1287 | static void __exit mod_exit(void) | |
1288 | { | |
1289 | unregister_hdlc_protocol(&proto); | |
1290 | } | |
1291 | ||
1292 | ||
1293 | module_init(mod_init); | |
1294 | module_exit(mod_exit); | |
1295 | ||
1296 | MODULE_AUTHOR("Krzysztof Halasa <khc@pm.waw.pl>"); | |
1297 | MODULE_DESCRIPTION("Frame-Relay protocol support for generic HDLC"); | |
1298 | MODULE_LICENSE("GPL v2"); |