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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * Generic HDLC support routines for Linux
3 * Frame Relay support
4 *
Krzysztof Halasaeb2a2fd2006-09-26 23:23:45 +02005 * Copyright (C) 1999 - 2006 Krzysztof Halasa <khc@pm.waw.pl>
Linus Torvalds1da177e2005-04-16 15:20:36 -07006 *
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
Krzysztof Halasab3dd65f2005-04-21 15:57:25 +020030 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
Linus Torvalds1da177e2005-04-16 15:20:36 -070034*/
35
Linus Torvalds1da177e2005-04-16 15:20:36 -070036#include <linux/errno.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070037#include <linux/etherdevice.h>
38#include <linux/hdlc.h>
Krzysztof Hałasa4dfce402008-06-30 19:06:40 +020039#include <linux/if_arp.h>
40#include <linux/inetdevice.h>
41#include <linux/init.h>
42#include <linux/kernel.h>
43#include <linux/module.h>
44#include <linux/pkt_sched.h>
45#include <linux/poll.h>
46#include <linux/rtnetlink.h>
47#include <linux/skbuff.h>
48#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070049
50#undef DEBUG_PKT
51#undef DEBUG_ECN
52#undef DEBUG_LINK
Krzysztof Halasaeb2a2fd2006-09-26 23:23:45 +020053#undef DEBUG_PROTO
54#undef DEBUG_PVC
Linus Torvalds1da177e2005-04-16 15:20:36 -070055
Krzysztof Halasab3dd65f2005-04-21 15:57:25 +020056#define FR_UI 0x03
57#define FR_PAD 0x00
Linus Torvalds1da177e2005-04-16 15:20:36 -070058
Krzysztof Halasab3dd65f2005-04-21 15:57:25 +020059#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
Linus Torvalds1da177e2005-04-16 15:20:36 -070065
66
Krzysztof Halasab3dd65f2005-04-21 15:57:25 +020067#define LMI_CCITT_ANSI_DLCI 0 /* LMI DLCI */
68#define LMI_CISCO_DLCI 1023
Linus Torvalds1da177e2005-04-16 15:20:36 -070069
Krzysztof Halasab3dd65f2005-04-21 15:57:25 +020070#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
Linus Torvalds1da177e2005-04-16 15:20:36 -070078
Krzysztof Halasab3dd65f2005-04-21 15:57:25 +020079#define LMI_FULLREP 0x00 /* full report */
80#define LMI_INTEGRITY 0x01 /* link integrity report */
81#define LMI_SINGLE 0x02 /* single PVC report */
Linus Torvalds1da177e2005-04-16 15:20:36 -070082
Linus Torvalds1da177e2005-04-16 15:20:36 -070083#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
Krzysztof Halasab3dd65f2005-04-21 15:57:25 +020089#define LMI_CCITT_CISCO_LENGTH 13 /* LMI frame lengths */
90#define LMI_ANSI_LENGTH 14
Linus Torvalds1da177e2005-04-16 15:20:36 -070091
92
Himangi Saraogi3fadb062014-08-09 22:17:16 +053093struct fr_hdr {
Linus Torvalds1da177e2005-04-16 15:20:36 -070094#if defined(__LITTLE_ENDIAN_BITFIELD)
95 unsigned ea1: 1;
96 unsigned cr: 1;
97 unsigned dlcih: 6;
Krzysztof Hałasa4dfce402008-06-30 19:06:40 +020098
Linus Torvalds1da177e2005-04-16 15:20:36 -070099 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
Himangi Saraogi3fadb062014-08-09 22:17:16 +0530115} __packed;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116
117
Himangi Saraogi3fadb062014-08-09 22:17:16 +0530118struct pvc_device {
Krzysztof Halasaeb2a2fd2006-09-26 23:23:45 +0200119 struct net_device *frad;
120 struct net_device *main;
121 struct net_device *ether; /* bridged Ethernet interface */
Himangi Saraogi3fadb062014-08-09 22:17:16 +0530122 struct pvc_device *next; /* Sorted in ascending DLCI order */
Krzysztof Halasaeb2a2fd2006-09-26 23:23:45 +0200123 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;
Himangi Saraogi3fadb062014-08-09 22:17:16 +0530135};
Krzysztof Halasaeb2a2fd2006-09-26 23:23:45 +0200136
Krzysztof Halasaeb2a2fd2006-09-26 23:23:45 +0200137struct frad_state {
138 fr_proto settings;
Himangi Saraogi3fadb062014-08-09 22:17:16 +0530139 struct pvc_device *first_pvc;
Krzysztof Halasaeb2a2fd2006-09-26 23:23:45 +0200140 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
155static int fr_ioctl(struct net_device *dev, struct ifreq *ifr);
156
157
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158static inline u16 q922_to_dlci(u8 *hdr)
159{
160 return ((hdr[0] & 0xFC) << 2) | ((hdr[1] & 0xF0) >> 4);
161}
162
163
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164static 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
Krzysztof Halasa983e2302008-02-01 22:34:30 +0100171static inline struct frad_state* state(hdlc_device *hdlc)
Krzysztof Halasaeb2a2fd2006-09-26 23:23:45 +0200172{
173 return(struct frad_state *)(hdlc->state);
174}
175
Krzysztof Halasaeb2a2fd2006-09-26 23:23:45 +0200176
Himangi Saraogi3fadb062014-08-09 22:17:16 +0530177static inline struct pvc_device *find_pvc(hdlc_device *hdlc, u16 dlci)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178{
Himangi Saraogi3fadb062014-08-09 22:17:16 +0530179 struct pvc_device *pvc = state(hdlc)->first_pvc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180
181 while (pvc) {
182 if (pvc->dlci == dlci)
183 return pvc;
184 if (pvc->dlci > dlci)
Rudy Matela870571a22009-11-25 10:20:20 -0300185 return NULL; /* the list is sorted */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186 pvc = pvc->next;
187 }
188
189 return NULL;
190}
191
192
Himangi Saraogi3fadb062014-08-09 22:17:16 +0530193static struct pvc_device *add_pvc(struct net_device *dev, u16 dlci)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194{
195 hdlc_device *hdlc = dev_to_hdlc(dev);
Himangi Saraogi3fadb062014-08-09 22:17:16 +0530196 struct pvc_device *pvc, **pvc_p = &state(hdlc)->first_pvc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197
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
Himangi Saraogi3fadb062014-08-09 22:17:16 +0530206 pvc = kzalloc(sizeof(*pvc), GFP_ATOMIC);
Krzysztof Halasaeb2a2fd2006-09-26 23:23:45 +0200207#ifdef DEBUG_PVC
208 printk(KERN_DEBUG "add_pvc: allocated pvc %p, frad %p\n", pvc, dev);
209#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210 if (!pvc)
211 return NULL;
212
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213 pvc->dlci = dlci;
Krzysztof Halasaeb2a2fd2006-09-26 23:23:45 +0200214 pvc->frad = dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215 pvc->next = *pvc_p; /* Put it in the chain */
216 *pvc_p = pvc;
217 return pvc;
218}
219
220
Himangi Saraogi3fadb062014-08-09 22:17:16 +0530221static inline int pvc_is_used(struct pvc_device *pvc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222{
Krzysztof Halasaeb2a2fd2006-09-26 23:23:45 +0200223 return pvc->main || pvc->ether;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224}
225
226
Himangi Saraogi3fadb062014-08-09 22:17:16 +0530227static inline void pvc_carrier(int on, struct pvc_device *pvc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228{
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
247static inline void delete_unused_pvcs(hdlc_device *hdlc)
248{
Himangi Saraogi3fadb062014-08-09 22:17:16 +0530249 struct pvc_device **pvc_p = &state(hdlc)->first_pvc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250
251 while (*pvc_p) {
252 if (!pvc_is_used(*pvc_p)) {
Himangi Saraogi3fadb062014-08-09 22:17:16 +0530253 struct pvc_device *pvc = *pvc_p;
Krzysztof Halasaeb2a2fd2006-09-26 23:23:45 +0200254#ifdef DEBUG_PVC
255 printk(KERN_DEBUG "freeing unused pvc: %p\n", pvc);
256#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257 *pvc_p = pvc->next;
258 kfree(pvc);
259 continue;
260 }
261 pvc_p = &(*pvc_p)->next;
262 }
263}
264
265
Himangi Saraogi3fadb062014-08-09 22:17:16 +0530266static inline struct net_device **get_dev_p(struct pvc_device *pvc,
267 int type)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268{
269 if (type == ARPHRD_ETHER)
270 return &pvc->ether;
271 else
272 return &pvc->main;
273}
274
275
Linus Torvalds1da177e2005-04-16 15:20:36 -0700276static 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) {
Harvey Harrison09640e62009-02-01 00:45:17 -0800282 case cpu_to_be16(NLPID_CCITT_ANSI_LMI):
Krzysztof Halasab3dd65f2005-04-21 15:57:25 +0200283 head_len = 4;
284 skb_push(skb, head_len);
285 skb->data[3] = NLPID_CCITT_ANSI_LMI;
286 break;
287
Harvey Harrison09640e62009-02-01 00:45:17 -0800288 case cpu_to_be16(NLPID_CISCO_LMI):
Krzysztof Halasab3dd65f2005-04-21 15:57:25 +0200289 head_len = 4;
290 skb_push(skb, head_len);
291 skb->data[3] = NLPID_CISCO_LMI;
292 break;
293
Harvey Harrison09640e62009-02-01 00:45:17 -0800294 case cpu_to_be16(ETH_P_IP):
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295 head_len = 4;
296 skb_push(skb, head_len);
297 skb->data[3] = NLPID_IP;
298 break;
299
Harvey Harrison09640e62009-02-01 00:45:17 -0800300 case cpu_to_be16(ETH_P_IPV6):
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301 head_len = 4;
302 skb_push(skb, head_len);
303 skb->data[3] = NLPID_IPV6;
304 break;
305
Harvey Harrison09640e62009-02-01 00:45:17 -0800306 case cpu_to_be16(ETH_P_802_3):
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307 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;
Krzysztof Halasaabf17ff2007-04-27 13:13:33 +0200334 *(__be16*)(skb->data + 8) = skb->protocol;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700335 }
336
337 dlci_to_q922(skb->data, dlci);
338 skb->data[2] = FR_UI;
339 return 0;
340}
341
342
343
344static int pvc_open(struct net_device *dev)
345{
Himangi Saraogi3fadb062014-08-09 22:17:16 +0530346 struct pvc_device *pvc = dev->ml_priv;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700347
Krzysztof Halasaeb2a2fd2006-09-26 23:23:45 +0200348 if ((pvc->frad->flags & IFF_UP) == 0)
349 return -EIO; /* Frad must be UP in order to activate PVC */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700350
351 if (pvc->open_count++ == 0) {
Krzysztof Halasaeb2a2fd2006-09-26 23:23:45 +0200352 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);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700355
356 pvc_carrier(pvc->state.active, pvc);
Krzysztof Halasaeb2a2fd2006-09-26 23:23:45 +0200357 state(hdlc)->dce_changed = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358 }
359 return 0;
360}
361
362
363
364static int pvc_close(struct net_device *dev)
365{
Himangi Saraogi3fadb062014-08-09 22:17:16 +0530366 struct pvc_device *pvc = dev->ml_priv;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700367
368 if (--pvc->open_count == 0) {
Krzysztof Halasaeb2a2fd2006-09-26 23:23:45 +0200369 hdlc_device *hdlc = dev_to_hdlc(pvc->frad);
370 if (state(hdlc)->settings.lmi == LMI_NONE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700371 pvc->state.active = 0;
372
Krzysztof Halasaeb2a2fd2006-09-26 23:23:45 +0200373 if (state(hdlc)->settings.dce) {
374 state(hdlc)->dce_changed = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700375 pvc->state.active = 0;
376 }
377 }
378 return 0;
379}
380
381
382
Adrian Bunk7665a082005-09-09 23:17:28 -0700383static int pvc_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700384{
Himangi Saraogi3fadb062014-08-09 22:17:16 +0530385 struct pvc_device *pvc = dev->ml_priv;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386 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;
Krzysztof Halasaeb2a2fd2006-09-26 23:23:45 +0200401 memcpy(info.master, pvc->frad->name, IFNAMSIZ);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700402 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
Stephen Hemmingerd71a6742009-08-31 19:50:47 +0000411static netdev_tx_t pvc_xmit(struct sk_buff *skb, struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700412{
Himangi Saraogi3fadb062014-08-09 22:17:16 +0530413 struct pvc_device *pvc = dev->ml_priv;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700414
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)) {
Krzysztof Halasa198191c2008-06-30 23:26:53 +0200423 dev->stats.tx_dropped++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424 dev_kfree_skb(skb);
Patrick McHardy6ed10652009-06-23 06:03:08 +0000425 return NETDEV_TX_OK;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700426 }
427 skb_put(skb, pad);
428 memset(skb->data + len, 0, pad);
429 }
Harvey Harrison09640e62009-02-01 00:45:17 -0800430 skb->protocol = cpu_to_be16(ETH_P_802_3);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700431 }
432 if (!fr_hard_header(&skb, pvc->dlci)) {
Krzysztof Halasa198191c2008-06-30 23:26:53 +0200433 dev->stats.tx_bytes += skb->len;
434 dev->stats.tx_packets++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700435 if (pvc->state.fecn) /* TX Congestion counter */
Krzysztof Halasa198191c2008-06-30 23:26:53 +0200436 dev->stats.tx_compressed++;
Krzysztof Halasaeb2a2fd2006-09-26 23:23:45 +0200437 skb->dev = pvc->frad;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700438 dev_queue_xmit(skb);
Patrick McHardy6ed10652009-06-23 06:03:08 +0000439 return NETDEV_TX_OK;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700440 }
441 }
442
Krzysztof Halasa198191c2008-06-30 23:26:53 +0200443 dev->stats.tx_dropped++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444 dev_kfree_skb(skb);
Patrick McHardy6ed10652009-06-23 06:03:08 +0000445 return NETDEV_TX_OK;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700446}
447
Himangi Saraogi3fadb062014-08-09 22:17:16 +0530448static inline void fr_log_dlci_active(struct pvc_device *pvc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700449{
Joe Perches12a3bfe2011-06-26 19:01:28 +0000450 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");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700458}
459
460
461
462static inline u8 fr_lmi_nextseq(u8 x)
463{
464 x++;
465 return x ? x : 1;
466}
467
468
Linus Torvalds1da177e2005-04-16 15:20:36 -0700469static void fr_lmi_send(struct net_device *dev, int fullrep)
470{
471 hdlc_device *hdlc = dev_to_hdlc(dev);
472 struct sk_buff *skb;
Himangi Saraogi3fadb062014-08-09 22:17:16 +0530473 struct pvc_device *pvc = state(hdlc)->first_pvc;
Krzysztof Halasaeb2a2fd2006-09-26 23:23:45 +0200474 int lmi = state(hdlc)->settings.lmi;
475 int dce = state(hdlc)->settings.dce;
Krzysztof Halasab3dd65f2005-04-21 15:57:25 +0200476 int len = lmi == LMI_ANSI ? LMI_ANSI_LENGTH : LMI_CCITT_CISCO_LENGTH;
477 int stat_len = (lmi == LMI_CISCO) ? 6 : 3;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700478 u8 *data;
479 int i = 0;
480
Krzysztof Halasab3dd65f2005-04-21 15:57:25 +0200481 if (dce && fullrep) {
Krzysztof Halasaeb2a2fd2006-09-26 23:23:45 +0200482 len += state(hdlc)->dce_pvc_count * (2 + stat_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700483 if (len > HDLC_MAX_MRU) {
Joe Perches12a3bfe2011-06-26 19:01:28 +0000484 netdev_warn(dev, "Too many PVCs while sending LMI full report\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700485 return;
486 }
487 }
488
489 skb = dev_alloc_skb(len);
490 if (!skb) {
Joe Perches12a3bfe2011-06-26 19:01:28 +0000491 netdev_warn(dev, "Memory squeeze on fr_lmi_send()\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700492 return;
493 }
494 memset(skb->data, 0, len);
495 skb_reserve(skb, 4);
Krzysztof Halasab3dd65f2005-04-21 15:57:25 +0200496 if (lmi == LMI_CISCO) {
Harvey Harrison09640e62009-02-01 00:45:17 -0800497 skb->protocol = cpu_to_be16(NLPID_CISCO_LMI);
Krzysztof Halasab3dd65f2005-04-21 15:57:25 +0200498 fr_hard_header(&skb, LMI_CISCO_DLCI);
499 } else {
Harvey Harrison09640e62009-02-01 00:45:17 -0800500 skb->protocol = cpu_to_be16(NLPID_CCITT_ANSI_LMI);
Krzysztof Halasab3dd65f2005-04-21 15:57:25 +0200501 fr_hard_header(&skb, LMI_CCITT_ANSI_DLCI);
502 }
Arnaldo Carvalho de Melo27a884d2007-04-19 20:29:13 -0700503 data = skb_tail_pointer(skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700504 data[i++] = LMI_CALLREF;
Krzysztof Halasab3dd65f2005-04-21 15:57:25 +0200505 data[i++] = dce ? LMI_STATUS : LMI_STATUS_ENQUIRY;
506 if (lmi == LMI_ANSI)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700507 data[i++] = LMI_ANSI_LOCKSHIFT;
Krzysztof Halasab3dd65f2005-04-21 15:57:25 +0200508 data[i++] = lmi == LMI_CCITT ? LMI_CCITT_REPTYPE :
509 LMI_ANSI_CISCO_REPTYPE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700510 data[i++] = LMI_REPT_LEN;
511 data[i++] = fullrep ? LMI_FULLREP : LMI_INTEGRITY;
Krzysztof Halasab3dd65f2005-04-21 15:57:25 +0200512 data[i++] = lmi == LMI_CCITT ? LMI_CCITT_ALIVE : LMI_ANSI_CISCO_ALIVE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700513 data[i++] = LMI_INTEG_LEN;
Krzysztof Halasaeb2a2fd2006-09-26 23:23:45 +0200514 data[i++] = state(hdlc)->txseq =
515 fr_lmi_nextseq(state(hdlc)->txseq);
516 data[i++] = state(hdlc)->rxseq;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700517
Krzysztof Halasab3dd65f2005-04-21 15:57:25 +0200518 if (dce && fullrep) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700519 while (pvc) {
Krzysztof Halasab3dd65f2005-04-21 15:57:25 +0200520 data[i++] = lmi == LMI_CCITT ? LMI_CCITT_PVCSTAT :
521 LMI_ANSI_CISCO_PVCSTAT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700522 data[i++] = stat_len;
523
524 /* LMI start/restart */
Krzysztof Halasaeb2a2fd2006-09-26 23:23:45 +0200525 if (state(hdlc)->reliable && !pvc->state.exist) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700526 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
Krzysztof Halasab3dd65f2005-04-21 15:57:25 +0200538 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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700552 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;
Arnaldo Carvalho de Meloc1d2bbe2007-04-10 20:45:18 -0700560 skb_reset_network_header(skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700561
562 dev_queue_xmit(skb);
563}
564
565
566
567static void fr_set_link_state(int reliable, struct net_device *dev)
568{
569 hdlc_device *hdlc = dev_to_hdlc(dev);
Himangi Saraogi3fadb062014-08-09 22:17:16 +0530570 struct pvc_device *pvc = state(hdlc)->first_pvc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700571
Krzysztof Halasaeb2a2fd2006-09-26 23:23:45 +0200572 state(hdlc)->reliable = reliable;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700573 if (reliable) {
Krzysztof Halasac2ce9202006-07-12 13:46:12 -0700574 netif_dormant_off(dev);
Krzysztof Halasaeb2a2fd2006-09-26 23:23:45 +0200575 state(hdlc)->n391cnt = 0; /* Request full status */
576 state(hdlc)->dce_changed = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700577
Krzysztof Halasaeb2a2fd2006-09-26 23:23:45 +0200578 if (state(hdlc)->settings.lmi == LMI_NONE) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700579 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 {
Krzysztof Halasac2ce9202006-07-12 13:46:12 -0700587 netif_dormant_on(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700588 while (pvc) { /* Deactivate all PVCs */
589 pvc_carrier(0, pvc);
590 pvc->state.exist = pvc->state.active = 0;
591 pvc->state.new = 0;
Krzysztof Halasaeb2a2fd2006-09-26 23:23:45 +0200592 if (!state(hdlc)->settings.dce)
Krzysztof Halasab3dd65f2005-04-21 15:57:25 +0200593 pvc->state.bandwidth = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700594 pvc = pvc->next;
595 }
596 }
597}
598
599
Linus Torvalds1da177e2005-04-16 15:20:36 -0700600static 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
Krzysztof Halasaeb2a2fd2006-09-26 23:23:45 +0200607 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;
Krzysztof Halasab3dd65f2005-04-21 15:57:25 +0200612 } else {
Krzysztof Halasaeb2a2fd2006-09-26 23:23:45 +0200613 state(hdlc)->last_errors <<= 1; /* Shift the list */
614 if (state(hdlc)->request) {
615 if (state(hdlc)->reliable)
Joe Perches12a3bfe2011-06-26 19:01:28 +0000616 netdev_info(dev, "No LMI status reply received\n");
Krzysztof Halasaeb2a2fd2006-09-26 23:23:45 +0200617 state(hdlc)->last_errors |= 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700618 }
619
Krzysztof Halasaeb2a2fd2006-09-26 23:23:45 +0200620 list = state(hdlc)->last_errors;
621 for (i = 0; i < state(hdlc)->settings.n393; i++, list >>= 1)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700622 cnt += (list & 1); /* errors count */
623
Krzysztof Halasaeb2a2fd2006-09-26 23:23:45 +0200624 reliable = (cnt < state(hdlc)->settings.n392);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700625 }
626
Krzysztof Halasaeb2a2fd2006-09-26 23:23:45 +0200627 if (state(hdlc)->reliable != reliable) {
Joe Perches12a3bfe2011-06-26 19:01:28 +0000628 netdev_info(dev, "Link %sreliable\n", reliable ? "" : "un");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700629 fr_set_link_state(reliable, dev);
630 }
631
Krzysztof Halasaeb2a2fd2006-09-26 23:23:45 +0200632 if (state(hdlc)->settings.dce)
633 state(hdlc)->timer.expires = jiffies +
634 state(hdlc)->settings.t392 * HZ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700635 else {
Krzysztof Halasaeb2a2fd2006-09-26 23:23:45 +0200636 if (state(hdlc)->n391cnt)
637 state(hdlc)->n391cnt--;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700638
Krzysztof Halasaeb2a2fd2006-09-26 23:23:45 +0200639 fr_lmi_send(dev, state(hdlc)->n391cnt == 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700640
Krzysztof Halasaeb2a2fd2006-09-26 23:23:45 +0200641 state(hdlc)->last_poll = jiffies;
642 state(hdlc)->request = 1;
643 state(hdlc)->timer.expires = jiffies +
644 state(hdlc)->settings.t391 * HZ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700645 }
646
Krzysztof Halasaeb2a2fd2006-09-26 23:23:45 +0200647 state(hdlc)->timer.function = fr_timer;
648 state(hdlc)->timer.data = arg;
649 add_timer(&state(hdlc)->timer);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700650}
651
652
Linus Torvalds1da177e2005-04-16 15:20:36 -0700653static int fr_lmi_recv(struct net_device *dev, struct sk_buff *skb)
654{
655 hdlc_device *hdlc = dev_to_hdlc(dev);
Himangi Saraogi3fadb062014-08-09 22:17:16 +0530656 struct pvc_device *pvc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700657 u8 rxseq, txseq;
Krzysztof Halasaeb2a2fd2006-09-26 23:23:45 +0200658 int lmi = state(hdlc)->settings.lmi;
659 int dce = state(hdlc)->settings.dce;
Krzysztof Halasab3dd65f2005-04-21 15:57:25 +0200660 int stat_len = (lmi == LMI_CISCO) ? 6 : 3, reptype, error, no_ram, i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700661
Krzysztof Halasab3dd65f2005-04-21 15:57:25 +0200662 if (skb->len < (lmi == LMI_ANSI ? LMI_ANSI_LENGTH :
663 LMI_CCITT_CISCO_LENGTH)) {
Joe Perches12a3bfe2011-06-26 19:01:28 +0000664 netdev_info(dev, "Short LMI frame\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700665 return 1;
666 }
667
Krzysztof Halasab3dd65f2005-04-21 15:57:25 +0200668 if (skb->data[3] != (lmi == LMI_CISCO ? NLPID_CISCO_LMI :
669 NLPID_CCITT_ANSI_LMI)) {
Joe Perches12a3bfe2011-06-26 19:01:28 +0000670 netdev_info(dev, "Received non-LMI frame with LMI DLCI\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700671 return 1;
672 }
673
Krzysztof Halasab3dd65f2005-04-21 15:57:25 +0200674 if (skb->data[4] != LMI_CALLREF) {
Joe Perches12a3bfe2011-06-26 19:01:28 +0000675 netdev_info(dev, "Invalid LMI Call reference (0x%02X)\n",
676 skb->data[4]);
Krzysztof Halasab3dd65f2005-04-21 15:57:25 +0200677 return 1;
678 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700679
Krzysztof Halasab3dd65f2005-04-21 15:57:25 +0200680 if (skb->data[5] != (dce ? LMI_STATUS_ENQUIRY : LMI_STATUS)) {
Joe Perches12a3bfe2011-06-26 19:01:28 +0000681 netdev_info(dev, "Invalid LMI Message type (0x%02X)\n",
682 skb->data[5]);
Krzysztof Halasab3dd65f2005-04-21 15:57:25 +0200683 return 1;
684 }
685
686 if (lmi == LMI_ANSI) {
687 if (skb->data[6] != LMI_ANSI_LOCKSHIFT) {
Joe Perches12a3bfe2011-06-26 19:01:28 +0000688 netdev_info(dev, "Not ANSI locking shift in LMI message (0x%02X)\n",
689 skb->data[6]);
Krzysztof Halasab3dd65f2005-04-21 15:57:25 +0200690 return 1;
691 }
692 i = 7;
693 } else
694 i = 6;
695
696 if (skb->data[i] != (lmi == LMI_CCITT ? LMI_CCITT_REPTYPE :
697 LMI_ANSI_CISCO_REPTYPE)) {
Joe Perches12a3bfe2011-06-26 19:01:28 +0000698 netdev_info(dev, "Not an LMI Report type IE (0x%02X)\n",
699 skb->data[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700700 return 1;
701 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700702
Krzysztof Halasab3dd65f2005-04-21 15:57:25 +0200703 if (skb->data[++i] != LMI_REPT_LEN) {
Joe Perches12a3bfe2011-06-26 19:01:28 +0000704 netdev_info(dev, "Invalid LMI Report type IE length (%u)\n",
705 skb->data[i]);
Krzysztof Halasab3dd65f2005-04-21 15:57:25 +0200706 return 1;
707 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700708
Krzysztof Halasab3dd65f2005-04-21 15:57:25 +0200709 reptype = skb->data[++i];
710 if (reptype != LMI_INTEGRITY && reptype != LMI_FULLREP) {
Joe Perches12a3bfe2011-06-26 19:01:28 +0000711 netdev_info(dev, "Unsupported LMI Report type (0x%02X)\n",
712 reptype);
Krzysztof Halasab3dd65f2005-04-21 15:57:25 +0200713 return 1;
714 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700715
Krzysztof Halasab3dd65f2005-04-21 15:57:25 +0200716 if (skb->data[++i] != (lmi == LMI_CCITT ? LMI_CCITT_ALIVE :
717 LMI_ANSI_CISCO_ALIVE)) {
Joe Perches12a3bfe2011-06-26 19:01:28 +0000718 netdev_info(dev, "Not an LMI Link integrity verification IE (0x%02X)\n",
719 skb->data[i]);
Krzysztof Halasab3dd65f2005-04-21 15:57:25 +0200720 return 1;
721 }
722
723 if (skb->data[++i] != LMI_INTEG_LEN) {
Joe Perches12a3bfe2011-06-26 19:01:28 +0000724 netdev_info(dev, "Invalid LMI Link integrity verification IE length (%u)\n",
725 skb->data[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700726 return 1;
727 }
728 i++;
729
Krzysztof Halasaeb2a2fd2006-09-26 23:23:45 +0200730 state(hdlc)->rxseq = skb->data[i++]; /* TX sequence from peer */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700731 rxseq = skb->data[i++]; /* Should confirm our sequence */
732
Krzysztof Halasaeb2a2fd2006-09-26 23:23:45 +0200733 txseq = state(hdlc)->txseq;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700734
Krzysztof Halasab3dd65f2005-04-21 15:57:25 +0200735 if (dce)
Krzysztof Halasaeb2a2fd2006-09-26 23:23:45 +0200736 state(hdlc)->last_poll = jiffies;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700737
738 error = 0;
Krzysztof Halasaeb2a2fd2006-09-26 23:23:45 +0200739 if (!state(hdlc)->reliable)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700740 error = 1;
741
Krzysztof Halasaeb2a2fd2006-09-26 23:23:45 +0200742 if (rxseq == 0 || rxseq != txseq) { /* Ask for full report next time */
743 state(hdlc)->n391cnt = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700744 error = 1;
745 }
746
Krzysztof Halasab3dd65f2005-04-21 15:57:25 +0200747 if (dce) {
Krzysztof Halasaeb2a2fd2006-09-26 23:23:45 +0200748 if (state(hdlc)->fullrep_sent && !error) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700749/* Stop sending full report - the last one has been confirmed by DTE */
Krzysztof Halasaeb2a2fd2006-09-26 23:23:45 +0200750 state(hdlc)->fullrep_sent = 0;
751 pvc = state(hdlc)->first_pvc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700752 while (pvc) {
753 if (pvc->state.new) {
754 pvc->state.new = 0;
755
756/* Tell DTE that new PVC is now active */
Krzysztof Halasaeb2a2fd2006-09-26 23:23:45 +0200757 state(hdlc)->dce_changed = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700758 }
759 pvc = pvc->next;
760 }
761 }
762
Krzysztof Halasaeb2a2fd2006-09-26 23:23:45 +0200763 if (state(hdlc)->dce_changed) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700764 reptype = LMI_FULLREP;
Krzysztof Halasaeb2a2fd2006-09-26 23:23:45 +0200765 state(hdlc)->fullrep_sent = 1;
766 state(hdlc)->dce_changed = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700767 }
768
Krzysztof Halasaeb2a2fd2006-09-26 23:23:45 +0200769 state(hdlc)->request = 1; /* got request */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700770 fr_lmi_send(dev, reptype == LMI_FULLREP ? 1 : 0);
771 return 0;
772 }
773
774 /* DTE */
775
Krzysztof Halasaeb2a2fd2006-09-26 23:23:45 +0200776 state(hdlc)->request = 0; /* got response, no request pending */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700777
778 if (error)
779 return 0;
780
781 if (reptype != LMI_FULLREP)
782 return 0;
783
Krzysztof Halasaeb2a2fd2006-09-26 23:23:45 +0200784 pvc = state(hdlc)->first_pvc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700785
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;
Krzysztof Halasab3dd65f2005-04-21 15:57:25 +0200794 u32 bw;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700795 unsigned int active, new;
796
Krzysztof Halasab3dd65f2005-04-21 15:57:25 +0200797 if (skb->data[i] != (lmi == LMI_CCITT ? LMI_CCITT_PVCSTAT :
798 LMI_ANSI_CISCO_PVCSTAT)) {
Joe Perches12a3bfe2011-06-26 19:01:28 +0000799 netdev_info(dev, "Not an LMI PVC status IE (0x%02X)\n",
800 skb->data[i]);
Krzysztof Halasab3dd65f2005-04-21 15:57:25 +0200801 return 1;
802 }
803
804 if (skb->data[++i] != stat_len) {
Joe Perches12a3bfe2011-06-26 19:01:28 +0000805 netdev_info(dev, "Invalid LMI PVC status IE length (%u)\n",
806 skb->data[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700807 return 1;
808 }
809 i++;
810
Krzysztof Halasab3dd65f2005-04-21 15:57:25 +0200811 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;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700822 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700823
824 pvc = add_pvc(dev, dlci);
825
826 if (!pvc && !no_ram) {
Joe Perches12a3bfe2011-06-26 19:01:28 +0000827 netdev_warn(dev, "Memory squeeze on fr_lmi_recv()\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700828 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 ||
Krzysztof Halasab3dd65f2005-04-21 15:57:25 +0200836 bw != pvc->state.bandwidth ||
Linus Torvalds1da177e2005-04-16 15:20:36 -0700837 !pvc->state.exist) {
838 pvc->state.new = new;
839 pvc->state.active = active;
Krzysztof Halasab3dd65f2005-04-21 15:57:25 +0200840 pvc->state.bandwidth = bw;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700841 pvc_carrier(active, pvc);
842 fr_log_dlci_active(pvc);
843 }
844 }
845
846 i += stat_len;
847 }
848
Krzysztof Halasaeb2a2fd2006-09-26 23:23:45 +0200849 pvc = state(hdlc)->first_pvc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700850
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;
Krzysztof Halasab3dd65f2005-04-21 15:57:25 +0200856 pvc->state.bandwidth = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700857 fr_log_dlci_active(pvc);
858 }
859 pvc = pvc->next;
860 }
861
862 /* Next full report after N391 polls */
Krzysztof Halasaeb2a2fd2006-09-26 23:23:45 +0200863 state(hdlc)->n391cnt = state(hdlc)->settings.n391;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700864
865 return 0;
866}
867
868
Linus Torvalds1da177e2005-04-16 15:20:36 -0700869static int fr_rx(struct sk_buff *skb)
870{
Krzysztof Halasaeb2a2fd2006-09-26 23:23:45 +0200871 struct net_device *frad = skb->dev;
872 hdlc_device *hdlc = dev_to_hdlc(frad);
Himangi Saraogi3fadb062014-08-09 22:17:16 +0530873 struct fr_hdr *fh = (struct fr_hdr *)skb->data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700874 u8 *data = skb->data;
875 u16 dlci;
Himangi Saraogi3fadb062014-08-09 22:17:16 +0530876 struct pvc_device *pvc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700877 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
Krzysztof Halasab3dd65f2005-04-21 15:57:25 +0200884 if ((dlci == LMI_CCITT_ANSI_DLCI &&
Krzysztof Halasaeb2a2fd2006-09-26 23:23:45 +0200885 (state(hdlc)->settings.lmi == LMI_ANSI ||
886 state(hdlc)->settings.lmi == LMI_CCITT)) ||
Krzysztof Halasab3dd65f2005-04-21 15:57:25 +0200887 (dlci == LMI_CISCO_DLCI &&
Krzysztof Halasaeb2a2fd2006-09-26 23:23:45 +0200888 state(hdlc)->settings.lmi == LMI_CISCO)) {
889 if (fr_lmi_recv(frad, skb))
Krzysztof Halasab3dd65f2005-04-21 15:57:25 +0200890 goto rx_error;
891 dev_kfree_skb_any(skb);
892 return NET_RX_SUCCESS;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700893 }
894
895 pvc = find_pvc(hdlc, dlci);
896 if (!pvc) {
897#ifdef DEBUG_PKT
Joe Perches12a3bfe2011-06-26 19:01:28 +0000898 netdev_info(frad, "No PVC for received frame's DLCI %d\n",
899 dlci);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700900#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
Krzysztof Halasaeb2a2fd2006-09-26 23:23:45 +0200907 printk(KERN_DEBUG "%s: DLCI %d FECN O%s\n", frad->name,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700908 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
Krzysztof Halasaeb2a2fd2006-09-26 23:23:45 +0200915 printk(KERN_DEBUG "%s: DLCI %d BECN O%s\n", frad->name,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700916 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) {
Krzysztof Halasa198191c2008-06-30 23:26:53 +0200923 frad->stats.rx_dropped++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700924 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) {
Krzysztof Halasaabf17ff2007-04-27 13:13:33 +0200939 u16 oui = ntohs(*(__be16*)(data + 6));
940 u16 pid = ntohs(*(__be16*)(data + 8));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700941 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:
Joe Perches12a3bfe2011-06-26 19:01:28 +0000958 netdev_info(frad, "Unsupported protocol, OUI=%x PID=%x\n",
959 oui, pid);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700960 dev_kfree_skb_any(skb);
961 return NET_RX_DROP;
962 }
963 } else {
Joe Perches12a3bfe2011-06-26 19:01:28 +0000964 netdev_info(frad, "Unsupported protocol, NLPID=%x length=%i\n",
965 data[3], skb->len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700966 dev_kfree_skb_any(skb);
967 return NET_RX_DROP;
968 }
969
970 if (dev) {
Krzysztof Halasa198191c2008-06-30 23:26:53 +0200971 dev->stats.rx_packets++; /* PVC traffic */
972 dev->stats.rx_bytes += skb->len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700973 if (pvc->state.becn)
Krzysztof Halasa198191c2008-06-30 23:26:53 +0200974 dev->stats.rx_compressed++;
Krzysztof Halasa54364b72008-06-29 21:48:11 +0200975 skb->dev = dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700976 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:
Krzysztof Halasa198191c2008-06-30 23:26:53 +0200984 frad->stats.rx_errors++; /* Mark error */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700985 dev_kfree_skb_any(skb);
986 return NET_RX_DROP;
987}
988
989
990
991static 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
Krzysztof Halasaeb2a2fd2006-09-26 23:23:45 +0200997 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;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001005
Krzysztof Halasaeb2a2fd2006-09-26 23:23:45 +02001006 init_timer(&state(hdlc)->timer);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001007 /* First poll after 1 s */
Krzysztof Halasaeb2a2fd2006-09-26 23:23:45 +02001008 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);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001012 } else
1013 fr_set_link_state(1, dev);
1014}
1015
1016
Linus Torvalds1da177e2005-04-16 15:20:36 -07001017static 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
Krzysztof Halasaeb2a2fd2006-09-26 23:23:45 +02001023 if (state(hdlc)->settings.lmi != LMI_NONE)
1024 del_timer_sync(&state(hdlc)->timer);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001025 fr_set_link_state(0, dev);
1026}
1027
1028
Linus Torvalds1da177e2005-04-16 15:20:36 -07001029static void fr_close(struct net_device *dev)
1030{
1031 hdlc_device *hdlc = dev_to_hdlc(dev);
Himangi Saraogi3fadb062014-08-09 22:17:16 +05301032 struct pvc_device *pvc = state(hdlc)->first_pvc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001033
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
Krzysztof Halasaeb2a2fd2006-09-26 23:23:45 +02001043
1044static void pvc_setup(struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001045{
1046 dev->type = ARPHRD_DLCI;
1047 dev->flags = IFF_POINTOPOINT;
1048 dev->hard_header_len = 10;
1049 dev->addr_len = 2;
Eric Dumazet02875872014-10-05 18:38:35 -07001050 netif_keep_dst(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001051}
1052
Krzysztof Hałasa991990a2009-01-08 22:52:11 +01001053static 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
Krzysztof Halasaeb2a2fd2006-09-26 23:23:45 +02001061static int fr_add_pvc(struct net_device *frad, unsigned int dlci, int type)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001062{
Krzysztof Halasaeb2a2fd2006-09-26 23:23:45 +02001063 hdlc_device *hdlc = dev_to_hdlc(frad);
Himangi Saraogi3fadb062014-08-09 22:17:16 +05301064 struct pvc_device *pvc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001065 struct net_device *dev;
Jiri Pirko1c5cae82011-04-30 01:21:32 +00001066 int used;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001067
Krzysztof Halasaeb2a2fd2006-09-26 23:23:45 +02001068 if ((pvc = add_pvc(frad, dlci)) == NULL) {
Joe Perches12a3bfe2011-06-26 19:01:28 +00001069 netdev_warn(frad, "Memory squeeze on fr_add_pvc()\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001070 return -ENOBUFS;
1071 }
1072
1073 if (*get_dev_p(pvc, type))
1074 return -EEXIST;
1075
1076 used = pvc_is_used(pvc);
1077
stephen hemminger52d17852015-11-17 14:26:06 -08001078 if (type == ARPHRD_ETHER)
Tom Gundersenc835a672014-07-14 16:37:24 +02001079 dev = alloc_netdev(0, "pvceth%d", NET_NAME_UNKNOWN,
1080 ether_setup);
stephen hemminger52d17852015-11-17 14:26:06 -08001081 else
Tom Gundersenc835a672014-07-14 16:37:24 +02001082 dev = alloc_netdev(0, "pvc%d", NET_NAME_UNKNOWN, pvc_setup);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001083
1084 if (!dev) {
Joe Perches12a3bfe2011-06-26 19:01:28 +00001085 netdev_warn(frad, "Memory squeeze on fr_pvc()\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001086 delete_unused_pvcs(hdlc);
1087 return -ENOBUFS;
1088 }
1089
stephen hemminger52d17852015-11-17 14:26:06 -08001090 if (type == ARPHRD_ETHER) {
1091 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
Danny Kukawkaf2cedb62012-02-15 06:45:39 +00001092 eth_hw_addr_random(dev);
stephen hemminger52d17852015-11-17 14:26:06 -08001093 } else {
Krzysztof Halasaabf17ff2007-04-27 13:13:33 +02001094 *(__be16*)dev->dev_addr = htons(dlci);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001095 dlci_to_q922(dev->broadcast, dlci);
1096 }
Krzysztof Hałasa991990a2009-01-08 22:52:11 +01001097 dev->netdev_ops = &pvc_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001098 dev->mtu = HDLC_MAX_MTU;
Phil Sutter4676a152015-08-18 10:30:46 +02001099 dev->priv_flags |= IFF_NO_QUEUE;
Wang Chen2baf8a22008-11-21 16:34:18 -08001100 dev->ml_priv = pvc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001101
Linus Torvalds1da177e2005-04-16 15:20:36 -07001102 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) {
Krzysztof Halasaeb2a2fd2006-09-26 23:23:45 +02001111 state(hdlc)->dce_changed = 1;
1112 state(hdlc)->dce_pvc_count++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001113 }
1114 return 0;
1115}
1116
1117
1118
1119static int fr_del_pvc(hdlc_device *hdlc, unsigned int dlci, int type)
1120{
Himangi Saraogi3fadb062014-08-09 22:17:16 +05301121 struct pvc_device *pvc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001122 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)) {
Krzysztof Halasaeb2a2fd2006-09-26 23:23:45 +02001137 state(hdlc)->dce_pvc_count--;
1138 state(hdlc)->dce_changed = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001139 }
1140 delete_unused_pvcs(hdlc);
1141 return 0;
1142}
1143
1144
1145
Krzysztof Halasaeb2a2fd2006-09-26 23:23:45 +02001146static void fr_destroy(struct net_device *frad)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001147{
Krzysztof Halasaeb2a2fd2006-09-26 23:23:45 +02001148 hdlc_device *hdlc = dev_to_hdlc(frad);
Himangi Saraogi3fadb062014-08-09 22:17:16 +05301149 struct pvc_device *pvc = state(hdlc)->first_pvc;
Krzysztof Halasaeb2a2fd2006-09-26 23:23:45 +02001150 state(hdlc)->first_pvc = NULL; /* All PVCs destroyed */
1151 state(hdlc)->dce_pvc_count = 0;
1152 state(hdlc)->dce_changed = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001153
1154 while (pvc) {
Himangi Saraogi3fadb062014-08-09 22:17:16 +05301155 struct pvc_device *next = pvc->next;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001156 /* 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
Krzysztof Halasaeb2a2fd2006-09-26 23:23:45 +02001169static struct hdlc_proto proto = {
1170 .close = fr_close,
1171 .start = fr_start,
1172 .stop = fr_stop,
1173 .detach = fr_destroy,
1174 .ioctl = fr_ioctl,
Krzysztof Halasa40d25142008-02-01 22:37:12 +01001175 .netif_rx = fr_rx,
Krzysztof Halasaeb2a2fd2006-09-26 23:23:45 +02001176 .module = THIS_MODULE,
1177};
Linus Torvalds1da177e2005-04-16 15:20:36 -07001178
Krzysztof Halasaeb2a2fd2006-09-26 23:23:45 +02001179
1180static int fr_ioctl(struct net_device *dev, struct ifreq *ifr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001181{
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:
Krzysztof Halasaeb2a2fd2006-09-26 23:23:45 +02001191 if (dev_to_hdlc(dev)->proto != &proto) /* Different proto */
1192 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001193 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 }
Krzysztof Halasaeb2a2fd2006-09-26 23:23:45 +02001198 if (copy_to_user(fr_s, &state(hdlc)->settings, size))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001199 return -EFAULT;
1200 return 0;
1201
1202 case IF_PROTO_FR:
Rudy Matela6f7ad1e2009-11-29 23:42:42 -08001203 if (!capable(CAP_NET_ADMIN))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001204 return -EPERM;
1205
Rudy Matela6f7ad1e2009-11-29 23:42:42 -08001206 if (dev->flags & IFF_UP)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001207 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 &&
Krzysztof Halasab3dd65f2005-04-21 15:57:25 +02001217 new_settings.lmi != LMI_CCITT &&
1218 new_settings.lmi != LMI_CISCO) ||
Linus Torvalds1da177e2005-04-16 15:20:36 -07001219 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
Krzysztof Halasaeb2a2fd2006-09-26 23:23:45 +02001233 if (dev_to_hdlc(dev)->proto != &proto) { /* Different proto */
Krzysztof Halasa40d25142008-02-01 22:37:12 +01001234 result = attach_hdlc_protocol(dev, &proto,
Krzysztof Halasaeb2a2fd2006-09-26 23:23:45 +02001235 sizeof(struct frad_state));
1236 if (result)
1237 return result;
1238 state(hdlc)->first_pvc = NULL;
1239 state(hdlc)->dce_pvc_count = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001240 }
Krzysztof Halasaeb2a2fd2006-09-26 23:23:45 +02001241 memcpy(&state(hdlc)->settings, &new_settings, size);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001242 dev->type = ARPHRD_FRAD;
Andrew Lunn2f8364a2015-12-03 21:12:31 +01001243 call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001244 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:
Krzysztof Halasaeb2a2fd2006-09-26 23:23:45 +02001250 if (dev_to_hdlc(dev)->proto != &proto) /* Different proto */
1251 return -EINVAL;
1252
Rudy Matela6f7ad1e2009-11-29 23:42:42 -08001253 if (!capable(CAP_NET_ADMIN))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001254 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}
Krzysztof Halasaeb2a2fd2006-09-26 23:23:45 +02001278
1279
1280static int __init mod_init(void)
1281{
1282 register_hdlc_protocol(&proto);
1283 return 0;
1284}
1285
1286
1287static void __exit mod_exit(void)
1288{
1289 unregister_hdlc_protocol(&proto);
1290}
1291
1292
1293module_init(mod_init);
1294module_exit(mod_exit);
1295
1296MODULE_AUTHOR("Krzysztof Halasa <khc@pm.waw.pl>");
1297MODULE_DESCRIPTION("Frame-Relay protocol support for generic HDLC");
1298MODULE_LICENSE("GPL v2");