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[PATCH] More updates for the dvb core
[linux-2.6/history.git] / drivers / media / dvb / dvb-core / dvb_net.c
blob9a4803c17d4f1e8ab0d0bea0f726e5fde975cf58
1 /*
2 * dvb_net.c
3 *
4 * Copyright (C) 2001 Convergence integrated media GmbH
5 * Ralph Metzler <ralph@convergence.de>
6 * Copyright (C) 2002 Ralph Metzler <rjkm@metzlerbros.de>
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License
10 * as published by the Free Software Foundation; either version 2
11 * of the License, or (at your option) any later version.
12 *
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
23 * Or, point your browser to http://www.gnu.org/copyleft/gpl.html
24 *
25 */
26
27 #include <linux/dvb/net.h>
28 #include <asm/uaccess.h>
29
30 #include "dvb_demux.h"
31 #include "dvb_net.h"
32 #include "dvb_functions.h"
33
34
35 #if 1
36 #define dprintk(x...) printk(x)
37 #else
38 #define dprintk(x...)
39 #endif
40
41
42 #define DVB_NET_MULTICAST_MAX 10
43
44 struct dvb_net_priv {
45 int in_use;
46 struct net_device_stats stats;
47 char name[6];
48 u16 pid;
49 struct dmx_demux *demux;
50 struct dmx_section_feed *secfeed;
51 struct dmx_section_filter *secfilter;
52 int multi_num;
53 struct dmx_section_filter *multi_secfilter[DVB_NET_MULTICAST_MAX];
54 unsigned char multi_macs[DVB_NET_MULTICAST_MAX][6];
55 int rx_mode;
56 #define RX_MODE_UNI 0
57 #define RX_MODE_MULTI 1
58 #define RX_MODE_ALL_MULTI 2
59 #define RX_MODE_PROMISC 3
60 struct work_struct set_multicast_list_wq;
61 struct work_struct restart_net_feed_wq;
62 };
63
64
65 /**
66 * Determine the packet's protocol ID. The rule here is that we
67 * assume 802.3 if the type field is short enough to be a length.
68 * This is normal practice and works for any 'now in use' protocol.
69 *
70 * stolen from eth.c out of the linux kernel, hacked for dvb-device
71 * by Michael Holzt <kju@debian.org>
72 */
73 static unsigned short dvb_net_eth_type_trans(struct sk_buff *skb,
74 struct net_device *dev)
75 {
76 struct ethhdr *eth;
77 unsigned char *rawp;
78
79 skb->mac.raw=skb->data;
80 skb_pull(skb,dev->hard_header_len);
81 eth= skb->mac.ethernet;
82
83 if (*eth->h_dest & 1) {
84 if(memcmp(eth->h_dest,dev->broadcast, ETH_ALEN)==0)
85 skb->pkt_type=PACKET_BROADCAST;
86 else
87 skb->pkt_type=PACKET_MULTICAST;
88 }
89
90 if (ntohs(eth->h_proto) >= 1536)
91 return eth->h_proto;
92
93 rawp = skb->data;
94
95 /**
96 * This is a magic hack to spot IPX packets. Older Novell breaks
97 * the protocol design and runs IPX over 802.3 without an 802.2 LLC
98 * layer. We look for FFFF which isn't a used 802.2 SSAP/DSAP. This
99 * won't work for fault tolerant netware but does for the rest.
100 */
101 if (*(unsigned short *)rawp == 0xFFFF)
102 return htons(ETH_P_802_3);
103
104 /**
105 * Real 802.2 LLC
106 */
107 return htons(ETH_P_802_2);
108 }
109
110
111 static void dvb_net_sec(struct net_device *dev, u8 *pkt, int pkt_len)
112 {
113 u8 *eth;
114 struct sk_buff *skb;
115
116 /* note: pkt_len includes a 32bit checksum */
117 if (pkt_len < 16) {
118 printk("%s: IP/MPE packet length = %d too small.\n",
119 dev->name, pkt_len);
120 ((struct dvb_net_priv *) dev->priv)->stats.rx_errors++;
121 ((struct dvb_net_priv *) dev->priv)->stats.rx_length_errors++;
122 return;
123 }
124 if ((pkt[5] & 0xfd) != 0xc1) {
125 /* drop scrambled or broken packets */
126 ((struct dvb_net_priv *) dev->priv)->stats.rx_errors++;
127 ((struct dvb_net_priv *) dev->priv)->stats.rx_crc_errors++;
128 return;
129 }
130 if (pkt[5] & 0x02) {
131 //FIXME: handle LLC/SNAP
132 ((struct dvb_net_priv *)dev->priv)->stats.rx_dropped++;
133 return;
134 }
135 if (pkt[7]) {
136 /* FIXME: assemble datagram from multiple sections */
137 ((struct dvb_net_priv *) dev->priv)->stats.rx_errors++;
138 ((struct dvb_net_priv *) dev->priv)->stats.rx_frame_errors++;
139 return;
140 }
141
142 /* we have 14 byte ethernet header (ip header follows);
143 * 12 byte MPE header; 4 byte checksum; + 2 byte alignment
144 */
145 if (!(skb = dev_alloc_skb(pkt_len - 4 - 12 + 14 + 2))) {
146 //printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n", dev->name);
147 ((struct dvb_net_priv *) dev->priv)->stats.rx_dropped++;
148 return;
149 }
150 skb_reserve(skb, 2); /* longword align L3 header */
151 skb->dev = dev;
152
153 /* copy L3 payload */
154 eth = (u8 *) skb_put(skb, pkt_len - 12 - 4 + 14);
155 memcpy(eth + 14, pkt + 12, pkt_len - 12 - 4);
156
157 /* create ethernet header: */
158 eth[0]=pkt[0x0b];
159 eth[1]=pkt[0x0a];
160 eth[2]=pkt[0x09];
161 eth[3]=pkt[0x08];
162 eth[4]=pkt[0x04];
163 eth[5]=pkt[0x03];
164
165 eth[6]=eth[7]=eth[8]=eth[9]=eth[10]=eth[11]=0;
166
167 eth[12] = 0x08; /* ETH_P_IP */
168 eth[13] = 0x00;
169
170 skb->protocol = dvb_net_eth_type_trans(skb, dev);
171
172 ((struct dvb_net_priv *)dev->priv)->stats.rx_packets++;
173 ((struct dvb_net_priv *)dev->priv)->stats.rx_bytes+=skb->len;
174 netif_rx(skb);
175 }
176
177 static int dvb_net_callback(const u8 *buffer1, size_t buffer1_len,
178 const u8 *buffer2, size_t buffer2_len,
179 struct dmx_section_filter *filter,
180 enum dmx_success success)
181 {
182 struct net_device *dev=(struct net_device *) filter->priv;
183
184 /**
185 * we rely on the DVB API definition where exactly one complete
186 * section is delivered in buffer1
187 */
188 dvb_net_sec (dev, (u8*) buffer1, buffer1_len);
189 return 0;
190 }
191
192 static int dvb_net_tx(struct sk_buff *skb, struct net_device *dev)
193 {
194 return 0;
195 }
196
197 static u8 mask_normal[6]={0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
198 static u8 mask_allmulti[6]={0xff, 0xff, 0xff, 0x00, 0x00, 0x00};
199 static u8 mac_allmulti[6]={0x01, 0x00, 0x5e, 0x00, 0x00, 0x00};
200 static u8 mask_promisc[6]={0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
201
202 static int dvb_net_filter_set(struct net_device *dev,
203 struct dmx_section_filter **secfilter,
204 u8 *mac, u8 *mac_mask)
205 {
206 struct dvb_net_priv *priv = (struct dvb_net_priv*) dev->priv;
207 int ret;
208
209 *secfilter=0;
210 ret = priv->secfeed->allocate_filter(priv->secfeed, secfilter);
211 if (ret<0) {
212 printk("%s: could not get filter\n", dev->name);
213 return ret;
214 }
215
216 (*secfilter)->priv=(void *) dev;
217
218 memset((*secfilter)->filter_value, 0x00, DMX_MAX_FILTER_SIZE);
219 memset((*secfilter)->filter_mask, 0x00, DMX_MAX_FILTER_SIZE);
220 memset((*secfilter)->filter_mode, 0xff, DMX_MAX_FILTER_SIZE);
221
222 (*secfilter)->filter_value[0]=0x3e;
223 (*secfilter)->filter_value[3]=mac[5];
224 (*secfilter)->filter_value[4]=mac[4];
225 (*secfilter)->filter_value[8]=mac[3];
226 (*secfilter)->filter_value[9]=mac[2];
227 (*secfilter)->filter_value[10]=mac[1];
228 (*secfilter)->filter_value[11]=mac[0];
229
230 (*secfilter)->filter_mask[0] = 0xff;
231 (*secfilter)->filter_mask[3] = mac_mask[5];
232 (*secfilter)->filter_mask[4] = mac_mask[4];
233 (*secfilter)->filter_mask[8] = mac_mask[3];
234 (*secfilter)->filter_mask[9] = mac_mask[2];
235 (*secfilter)->filter_mask[10] = mac_mask[1];
236 (*secfilter)->filter_mask[11]=mac_mask[0];
237
238 dprintk("%s: filter mac=%02x %02x %02x %02x %02x %02x\n",
239 dev->name, mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
240 dprintk("%s: filter mask=%02x %02x %02x %02x %02x %02x\n",
241 dev->name, mac_mask[0], mac_mask[1], mac_mask[2],
242 mac_mask[3], mac_mask[4], mac_mask[5]);
243
244 return 0;
245 }
246
247 static int dvb_net_feed_start(struct net_device *dev)
248 {
249 int ret, i;
250 struct dvb_net_priv *priv = (struct dvb_net_priv*) dev->priv;
251 struct dmx_demux *demux = priv->demux;
252 unsigned char *mac = (unsigned char *) dev->dev_addr;
253
254 dprintk("%s: rx_mode %i\n", __FUNCTION__, priv->rx_mode);
255 if (priv->secfeed || priv->secfilter || priv->multi_secfilter[0])
256 printk("%s: BUG %d\n", __FUNCTION__, __LINE__);
257
258 priv->secfeed=0;
259 priv->secfilter=0;
260
261 dprintk("%s: alloc secfeed\n", __FUNCTION__);
262 ret=demux->allocate_section_feed(demux, &priv->secfeed,
263 dvb_net_callback);
264 if (ret<0) {
265 printk("%s: could not allocate section feed\n", dev->name);
266 return ret;
267 }
268
269 ret = priv->secfeed->set(priv->secfeed, priv->pid, 32768, 0, 1);
270
271 if (ret<0) {
272 printk("%s: could not set section feed\n", dev->name);
273 priv->demux->release_section_feed(priv->demux, priv->secfeed);
274 priv->secfeed=0;
275 return ret;
276 }
277
278 if (priv->rx_mode != RX_MODE_PROMISC) {
279 dprintk("%s: set secfilter\n", __FUNCTION__);
280 dvb_net_filter_set(dev, &priv->secfilter, mac, mask_normal);
281 }
282
283 switch (priv->rx_mode) {
284 case RX_MODE_MULTI:
285 for (i = 0; i < priv->multi_num; i++) {
286 dprintk("%s: set multi_secfilter[%d]\n", __FUNCTION__, i);
287 dvb_net_filter_set(dev, &priv->multi_secfilter[i],
288 priv->multi_macs[i], mask_normal);
289 }
290 break;
291 case RX_MODE_ALL_MULTI:
292 priv->multi_num=1;
293 dprintk("%s: set multi_secfilter[0]\n", __FUNCTION__);
294 dvb_net_filter_set(dev, &priv->multi_secfilter[0],
295 mac_allmulti, mask_allmulti);
296 break;
297 case RX_MODE_PROMISC:
298 priv->multi_num=0;
299 dprintk("%s: set secfilter\n", __FUNCTION__);
300 dvb_net_filter_set(dev, &priv->secfilter, mac, mask_promisc);
301 break;
302 }
303
304 dprintk("%s: start filtering\n", __FUNCTION__);
305 priv->secfeed->start_filtering(priv->secfeed);
306 return 0;
307 }
308
309 static void dvb_net_feed_stop(struct net_device *dev)
310 {
311 struct dvb_net_priv *priv = (struct dvb_net_priv*) dev->priv;
312 int i;
313
314 dprintk("%s\n", __FUNCTION__);
315 if (priv->secfeed) {
316 if (priv->secfeed->is_filtering) {
317 dprintk("%s: stop secfeed\n", __FUNCTION__);
318 priv->secfeed->stop_filtering(priv->secfeed);
319 }
320
321 if (priv->secfilter) {
322 dprintk("%s: release secfilter\n", __FUNCTION__);
323 priv->secfeed->release_filter(priv->secfeed,
324 priv->secfilter);
325 priv->secfilter=0;
326 }
327
328 for (i=0; i<priv->multi_num; i++) {
329 if (priv->multi_secfilter[i]) {
330 dprintk("%s: release multi_filter[%d]\n", __FUNCTION__, i);
331 priv->secfeed->release_filter(priv->secfeed,
332 priv->multi_secfilter[i]);
333 priv->multi_secfilter[i]=0;
334 }
335 }
336
337 priv->demux->release_section_feed(priv->demux, priv->secfeed);
338 priv->secfeed=0;
339 } else
340 printk("%s: no feed to stop\n", dev->name);
341 }
342
343
344 static int dvb_set_mc_filter (struct net_device *dev, struct dev_mc_list *mc)
345 {
346 struct dvb_net_priv *priv = (struct dvb_net_priv*) dev->priv;
347
348 if (priv->multi_num == DVB_NET_MULTICAST_MAX)
349 return -ENOMEM;
350
351 memcpy(priv->multi_macs[priv->multi_num], mc->dmi_addr, 6);
352
353 priv->multi_num++;
354 return 0;
355 }
356
357
358 static void wq_set_multicast_list (void *data)
359 {
360 struct net_device *dev = data;
361 struct dvb_net_priv *priv = (struct dvb_net_priv*) dev->priv;
362
363 dvb_net_feed_stop(dev);
364
365 priv->rx_mode = RX_MODE_UNI;
366
367 if(dev->flags & IFF_PROMISC) {
368 dprintk("%s: promiscuous mode\n", dev->name);
369 priv->rx_mode = RX_MODE_PROMISC;
370 } else if ((dev->flags & IFF_ALLMULTI)) {
371 dprintk("%s: allmulti mode\n", dev->name);
372 priv->rx_mode = RX_MODE_ALL_MULTI;
373 } else if (dev->mc_count) {
374 int mci;
375 struct dev_mc_list *mc;
376
377 dprintk("%s: set_mc_list, %d entries\n",
378 dev->name, dev->mc_count);
379
380 priv->rx_mode = RX_MODE_MULTI;
381 priv->multi_num = 0;
382
383 for (mci = 0, mc=dev->mc_list;
384 mci < dev->mc_count;
385 mc = mc->next, mci++) {
386 dvb_set_mc_filter(dev, mc);
387 }
388 }
389
390 dvb_net_feed_start(dev);
391 }
392
393
394 static void dvb_net_set_multicast_list (struct net_device *dev)
395 {
396 struct dvb_net_priv *priv = (struct dvb_net_priv*) dev->priv;
397 schedule_work(&priv->set_multicast_list_wq);
398 }
399
400
401 static int dvb_net_set_config(struct net_device *dev, struct ifmap *map)
402 {
403 if (netif_running(dev))
404 return -EBUSY;
405 return 0;
406 }
407
408
409 static void wq_restart_net_feed (void *data)
410 {
411 struct net_device *dev = data;
412
413 if (netif_running(dev)) {
414 dvb_net_feed_stop(dev);
415 dvb_net_feed_start(dev);
416 }
417 }
418
419
420 static int dvb_net_set_mac (struct net_device *dev, void *p)
421 {
422 struct dvb_net_priv *priv = (struct dvb_net_priv*) dev->priv;
423 struct sockaddr *addr=p;
424
425 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
426
427 if (netif_running(dev))
428 schedule_work(&priv->restart_net_feed_wq);
429
430 return 0;
431 }
432
433
434 static int dvb_net_open(struct net_device *dev)
435 {
436 struct dvb_net_priv *priv = (struct dvb_net_priv*) dev->priv;
437
438 priv->in_use++;
439 dvb_net_feed_start(dev);
440 return 0;
441 }
442
443
444 static int dvb_net_stop(struct net_device *dev)
445 {
446 struct dvb_net_priv *priv = (struct dvb_net_priv*) dev->priv;
447
448 priv->in_use--;
449 dvb_net_feed_stop(dev);
450 return 0;
451 }
452
453 static struct net_device_stats * dvb_net_get_stats(struct net_device *dev)
454 {
455 return &((struct dvb_net_priv*) dev->priv)->stats;
456 }
457
458
459 static int dvb_net_init_dev(struct net_device *dev)
460 {
461 ether_setup(dev);
462
463 dev->open = dvb_net_open;
464 dev->stop = dvb_net_stop;
465 dev->hard_start_xmit = dvb_net_tx;
466 dev->get_stats = dvb_net_get_stats;
467 dev->set_multicast_list = dvb_net_set_multicast_list;
468 dev->set_config = dvb_net_set_config;
469 dev->set_mac_address = dvb_net_set_mac;
470 dev->mtu = 4096;
471 dev->mc_count = 0;
472 dev->hard_header_cache = NULL;
473
474 dev->flags |= IFF_NOARP;
475
476 return 0;
477 }
478
479 static int get_if(struct dvb_net *dvbnet)
480 {
481 int i;
482
483 for (i=0; i<DVB_NET_DEVICES_MAX; i++)
484 if (!dvbnet->state[i])
485 break;
486
487 if (i == DVB_NET_DEVICES_MAX)
488 return -1;
489
490 dvbnet->state[i]=1;
491 return i;
492 }
493
494
495 static int dvb_net_add_if(struct dvb_net *dvbnet, u16 pid)
496 {
497 struct net_device *net;
498 struct dmx_demux *demux;
499 struct dvb_net_priv *priv;
500 int result;
501 int if_num;
502
503 if ((if_num = get_if(dvbnet)) < 0)
504 return -EINVAL;
505
506 net=&dvbnet->device[if_num];
507 demux=dvbnet->demux;
508
509 memset(net, 0, sizeof(struct net_device));
510
511 memcpy(net->name, "dvb0_0", 7);
512 net->name[3] = dvbnet->dvbdev->adapter->num + '0';
513 net->name[5] = if_num + '0';
514 net->addr_len = 6;
515 memcpy(net->dev_addr, dvbnet->dvbdev->adapter->proposed_mac, 6);
516 net->next = NULL;
517 net->init = dvb_net_init_dev;
518
519 if (!(net->priv = kmalloc(sizeof(struct dvb_net_priv), GFP_KERNEL)))
520 return -ENOMEM;
521
522 priv = net->priv;
523 memset(priv, 0, sizeof(struct dvb_net_priv));
524 priv->demux = demux;
525 priv->pid = pid;
526 priv->rx_mode = RX_MODE_UNI;
527
528 INIT_WORK(&priv->set_multicast_list_wq, wq_set_multicast_list, net);
529 INIT_WORK(&priv->restart_net_feed_wq, wq_restart_net_feed, net);
530
531 net->base_addr = pid;
532
533 if ((result = register_netdev(net)) < 0) {
534 return result;
535 }
536
537 return if_num;
538 }
539
540
541 static int dvb_net_remove_if(struct dvb_net *dvbnet, int num)
542 {
543 struct dvb_net_priv *priv = dvbnet->device[num].priv;
544
545 if (!dvbnet->state[num])
546 return -EINVAL;
547 if (priv->in_use)
548 return -EBUSY;
549
550 dvb_net_stop(&dvbnet->device[num]);
551 flush_scheduled_work();
552 kfree(priv);
553 unregister_netdev(&dvbnet->device[num]);
554 dvbnet->state[num]=0;
555 return 0;
556 }
557
558
559 static int dvb_net_do_ioctl(struct inode *inode, struct file *file,
560 unsigned int cmd, void *parg)
561 {
562 struct dvb_device *dvbdev = (struct dvb_device *) file->private_data;
563 struct dvb_net *dvbnet = (struct dvb_net *) dvbdev->priv;
564
565 if (((file->f_flags&O_ACCMODE)==O_RDONLY))
566 return -EPERM;
567
568 switch (cmd) {
569 case NET_ADD_IF:
570 {
571 struct dvb_net_if *dvbnetif=(struct dvb_net_if *)parg;
572 int result;
573
574 if (!capable(CAP_SYS_ADMIN))
575 return -EPERM;
576 result=dvb_net_add_if(dvbnet, dvbnetif->pid);
577 if (result<0)
578 return result;
579 dvbnetif->if_num=result;
580 break;
581 }
582 case NET_GET_IF:
583 {
584 struct net_device *netdev;
585 struct dvb_net_priv *priv_data;
586 struct dvb_net_if *dvbnetif=(struct dvb_net_if *)parg;
587
588 if (dvbnetif->if_num >= DVB_NET_DEVICES_MAX ||
589 !dvbnet->state[dvbnetif->if_num])
590 return -EFAULT;
591
592 netdev=(struct net_device*)&dvbnet->device[dvbnetif->if_num];
593 priv_data=(struct dvb_net_priv*)netdev->priv;
594 dvbnetif->pid=priv_data->pid;
595 break;
596 }
597 case NET_REMOVE_IF:
598 if (!capable(CAP_SYS_ADMIN))
599 return -EPERM;
600 return dvb_net_remove_if(dvbnet, (int) parg);
601 default:
602 return -EINVAL;
603 }
604 return 0;
605 }
606
607 static int dvb_net_ioctl(struct inode *inode, struct file *file,
608 unsigned int cmd, unsigned long arg)
609 {
610 return dvb_usercopy(inode, file, cmd, arg, dvb_net_do_ioctl);
611 }
612
613 static struct file_operations dvb_net_fops = {
614 .owner = THIS_MODULE,
615 .read = 0,
616 .write = 0,
617 .ioctl = dvb_net_ioctl,
618 .open = dvb_generic_open,
619 .release = dvb_generic_release,
620 .poll = 0,
621 };
622
623 static struct dvb_device dvbdev_net = {
624 .priv = 0,
625 .users = 1,
626 .writers = 1,
627 .fops = &dvb_net_fops,
628 };
629
630
631 void dvb_net_release (struct dvb_net *dvbnet)
632 {
633 int i;
634
635 dvb_unregister_device(dvbnet->dvbdev);
636
637 for (i=0; i<DVB_NET_DEVICES_MAX; i++) {
638 if (!dvbnet->state[i])
639 continue;
640 dvb_net_remove_if(dvbnet, i);
641 }
642 }
643
644
645 int dvb_net_init (struct dvb_adapter *adap, struct dvb_net *dvbnet,
646 struct dmx_demux *dmx)
647 {
648 int i;
649
650 dvbnet->demux = dmx;
651
652 for (i=0; i<DVB_NET_DEVICES_MAX; i++)
653 dvbnet->state[i] = 0;
654
655 dvb_register_device (adap, &dvbnet->dvbdev, &dvbdev_net,
656 dvbnet, DVB_DEVICE_NET);
657
658 return 0;
659 }
660
Historical 2.5/2.6 development