1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54#define pr_fmt(fmt) "dvb_net: " fmt
55
56#include <linux/module.h>
57#include <linux/kernel.h>
58#include <linux/netdevice.h>
59#include <linux/etherdevice.h>
60#include <linux/dvb/net.h>
61#include <linux/uio.h>
62#include <linux/uaccess.h>
63#include <linux/crc32.h>
64#include <linux/mutex.h>
65#include <linux/sched.h>
66
67#include "dvb_demux.h"
68#include "dvb_net.h"
69
70static inline __u32 iov_crc32( __u32 c, struct kvec *iov, unsigned int cnt )
71{
72 unsigned int j;
73 for (j = 0; j < cnt; j++)
74 c = crc32_be( c, iov[j].iov_base, iov[j].iov_len );
75 return c;
76}
77
78
79#define DVB_NET_MULTICAST_MAX 10
80
81#undef ULE_DEBUG
82
83#ifdef ULE_DEBUG
84
85static void hexdump(const unsigned char *buf, unsigned short len)
86{
87 print_hex_dump_debug("", DUMP_PREFIX_OFFSET, 16, 1, buf, len, true);
88}
89
90#endif
91
92struct dvb_net_priv {
93 int in_use;
94 u16 pid;
95 struct net_device *net;
96 struct dvb_net *host;
97 struct dmx_demux *demux;
98 struct dmx_section_feed *secfeed;
99 struct dmx_section_filter *secfilter;
100 struct dmx_ts_feed *tsfeed;
101 int multi_num;
102 struct dmx_section_filter *multi_secfilter[DVB_NET_MULTICAST_MAX];
103 unsigned char multi_macs[DVB_NET_MULTICAST_MAX][6];
104 int rx_mode;
105#define RX_MODE_UNI 0
106#define RX_MODE_MULTI 1
107#define RX_MODE_ALL_MULTI 2
108#define RX_MODE_PROMISC 3
109 struct work_struct set_multicast_list_wq;
110 struct work_struct restart_net_feed_wq;
111 unsigned char feedtype;
112 int need_pusi;
113 unsigned char tscc;
114 struct sk_buff *ule_skb;
115 unsigned char *ule_next_hdr;
116 unsigned short ule_sndu_len;
117 unsigned short ule_sndu_type;
118 unsigned char ule_sndu_type_1;
119 unsigned char ule_dbit;
120
121 unsigned char ule_bridged;
122 int ule_sndu_remain;
123 unsigned long ts_count;
124 struct mutex mutex;
125};
126
127
128
129
130
131
132
133
134
135
136static __be16 dvb_net_eth_type_trans(struct sk_buff *skb,
137 struct net_device *dev)
138{
139 struct ethhdr *eth;
140 unsigned char *rawp;
141
142 skb_reset_mac_header(skb);
143 skb_pull(skb,dev->hard_header_len);
144 eth = eth_hdr(skb);
145
146 if (*eth->h_dest & 1) {
147 if(ether_addr_equal(eth->h_dest,dev->broadcast))
148 skb->pkt_type=PACKET_BROADCAST;
149 else
150 skb->pkt_type=PACKET_MULTICAST;
151 }
152
153 if (ntohs(eth->h_proto) >= ETH_P_802_3_MIN)
154 return eth->h_proto;
155
156 rawp = skb->data;
157
158
159
160
161
162
163
164 if (*(unsigned short *)rawp == 0xFFFF)
165 return htons(ETH_P_802_3);
166
167
168
169
170 return htons(ETH_P_802_2);
171}
172
173#define TS_SZ 188
174#define TS_SYNC 0x47
175#define TS_TEI 0x80
176#define TS_SC 0xC0
177#define TS_PUSI 0x40
178#define TS_AF_A 0x20
179#define TS_AF_D 0x10
180
181
182
183#define ULE_TEST 0
184#define ULE_BRIDGED 1
185
186#define ULE_OPTEXTHDR_PADDING 0
187
188static int ule_test_sndu( struct dvb_net_priv *p )
189{
190 return -1;
191}
192
193static int ule_bridged_sndu( struct dvb_net_priv *p )
194{
195 struct ethhdr *hdr = (struct ethhdr*) p->ule_next_hdr;
196 if(ntohs(hdr->h_proto) < ETH_P_802_3_MIN) {
197 int framelen = p->ule_sndu_len - ((p->ule_next_hdr+sizeof(struct ethhdr)) - p->ule_skb->data);
198
199 if(framelen != ntohs(hdr->h_proto)) {
200 return -1;
201 }
202 }
203
204
205
206
207
208
209 p->ule_bridged = 1;
210 return 0;
211}
212
213static int ule_exthdr_padding(struct dvb_net_priv *p)
214{
215 return 0;
216}
217
218
219
220
221
222
223static int handle_one_ule_extension( struct dvb_net_priv *p )
224{
225
226 static int (*ule_mandatory_ext_handlers[255])( struct dvb_net_priv *p ) =
227 { [0] = ule_test_sndu, [1] = ule_bridged_sndu, [2] = NULL, };
228
229
230 static int (*ule_optional_ext_handlers[255])( struct dvb_net_priv *p ) =
231 { [0] = ule_exthdr_padding, [1] = NULL, };
232
233 int ext_len = 0;
234 unsigned char hlen = (p->ule_sndu_type & 0x0700) >> 8;
235 unsigned char htype = p->ule_sndu_type & 0x00FF;
236
237
238 if (hlen == 0) {
239
240 if (ule_mandatory_ext_handlers[htype]) {
241 ext_len = ule_mandatory_ext_handlers[htype]( p );
242 if(ext_len >= 0) {
243 p->ule_next_hdr += ext_len;
244 if (!p->ule_bridged) {
245 p->ule_sndu_type = ntohs(*(__be16 *)p->ule_next_hdr);
246 p->ule_next_hdr += 2;
247 } else {
248 p->ule_sndu_type = ntohs(*(__be16 *)(p->ule_next_hdr + ((p->ule_dbit ? 2 : 3) * ETH_ALEN)));
249
250 }
251 }
252
253 } else
254 ext_len = -1;
255 } else {
256
257 ext_len = hlen << 1;
258
259 if (ule_optional_ext_handlers[htype])
260 (void)ule_optional_ext_handlers[htype]( p );
261 p->ule_next_hdr += ext_len;
262 p->ule_sndu_type = ntohs( *(__be16 *)(p->ule_next_hdr-2) );
263
264
265
266
267 }
268
269 return ext_len;
270}
271
272static int handle_ule_extensions( struct dvb_net_priv *p )
273{
274 int total_ext_len = 0, l;
275
276 p->ule_next_hdr = p->ule_skb->data;
277 do {
278 l = handle_one_ule_extension( p );
279 if (l < 0)
280 return l;
281 total_ext_len += l;
282#ifdef ULE_DEBUG
283 pr_debug("ule_next_hdr=%p, ule_sndu_type=%i, l=%i, total_ext_len=%i\n",
284 p->ule_next_hdr, (int)p->ule_sndu_type,
285 l, total_ext_len);
286#endif
287
288 } while (p->ule_sndu_type < ETH_P_802_3_MIN);
289
290 return total_ext_len;
291}
292
293
294
295static inline void reset_ule( struct dvb_net_priv *p )
296{
297 p->ule_skb = NULL;
298 p->ule_next_hdr = NULL;
299 p->ule_sndu_len = 0;
300 p->ule_sndu_type = 0;
301 p->ule_sndu_type_1 = 0;
302 p->ule_sndu_remain = 0;
303 p->ule_dbit = 0xFF;
304 p->ule_bridged = 0;
305}
306
307
308
309
310
311
312struct dvb_net_ule_handle {
313 struct net_device *dev;
314 struct dvb_net_priv *priv;
315 struct ethhdr *ethh;
316 const u8 *buf;
317 size_t buf_len;
318 unsigned long skipped;
319 const u8 *ts, *ts_end, *from_where;
320 u8 ts_remain, how_much, new_ts;
321 bool error;
322#ifdef ULE_DEBUG
323
324
325
326
327 static unsigned char ule_hist[100*TS_SZ];
328 static unsigned char *ule_where = ule_hist, ule_dump;
329#endif
330};
331
332static int dvb_net_ule_new_ts_cell(struct dvb_net_ule_handle *h)
333{
334
335
336#ifdef ULE_DEBUG
337 if (h->ule_where >= &h->ule_hist[100*TS_SZ])
338 h->ule_where = h->ule_hist;
339 memcpy(h->ule_where, h->ts, TS_SZ);
340 if (h->ule_dump) {
341 hexdump(h->ule_where, TS_SZ);
342 h->ule_dump = 0;
343 }
344 h->ule_where += TS_SZ;
345#endif
346
347
348
349
350
351 if ((h->ts[0] != TS_SYNC) || (h->ts[1] & TS_TEI) ||
352 ((h->ts[3] & TS_SC) != 0)) {
353 pr_warn("%lu: Invalid TS cell: SYNC %#x, TEI %u, SC %#x.\n",
354 h->priv->ts_count, h->ts[0],
355 (h->ts[1] & TS_TEI) >> 7,
356 (h->ts[3] & TS_SC) >> 6);
357
358
359 if (h->priv->ule_skb) {
360 dev_kfree_skb(h->priv->ule_skb);
361
362 h->dev->stats.rx_errors++;
363 h->dev->stats.rx_frame_errors++;
364 }
365 reset_ule(h->priv);
366 h->priv->need_pusi = 1;
367
368
369 h->ts += TS_SZ;
370 h->priv->ts_count++;
371 return 1;
372 }
373
374 h->ts_remain = 184;
375 h->from_where = h->ts + 4;
376
377 return 0;
378}
379
380static int dvb_net_ule_ts_pusi(struct dvb_net_ule_handle *h)
381{
382 if (h->ts[1] & TS_PUSI) {
383
384
385 h->priv->tscc = h->ts[3] & 0x0F;
386
387 if (h->ts[4] > h->ts_remain) {
388 pr_err("%lu: Invalid ULE packet (pointer field %d)\n",
389 h->priv->ts_count, h->ts[4]);
390 h->ts += TS_SZ;
391 h->priv->ts_count++;
392 return 1;
393 }
394
395 h->from_where = &h->ts[5] + h->ts[4];
396 h->ts_remain -= 1 + h->ts[4];
397 h->skipped = 0;
398 } else {
399 h->skipped++;
400 h->ts += TS_SZ;
401 h->priv->ts_count++;
402 return 1;
403 }
404
405 return 0;
406}
407
408static int dvb_net_ule_new_ts(struct dvb_net_ule_handle *h)
409{
410
411 if ((h->ts[3] & 0x0F) == h->priv->tscc)
412 h->priv->tscc = (h->priv->tscc + 1) & 0x0F;
413 else {
414
415 pr_warn("%lu: TS discontinuity: got %#x, expected %#x.\n",
416 h->priv->ts_count, h->ts[3] & 0x0F,
417 h->priv->tscc);
418
419 if (h->priv->ule_skb) {
420 dev_kfree_skb(h->priv->ule_skb);
421
422
423 h->dev->stats.rx_errors++;
424 h->dev->stats.rx_frame_errors++;
425 }
426 reset_ule(h->priv);
427
428 h->priv->need_pusi = 1;
429 return 1;
430 }
431
432
433
434
435
436
437 if (h->ts[1] & TS_PUSI) {
438 if (!h->priv->need_pusi) {
439 if (!(*h->from_where < (h->ts_remain-1)) ||
440 *h->from_where != h->priv->ule_sndu_remain) {
441
442
443
444
445 pr_warn("%lu: Invalid pointer field: %u.\n",
446 h->priv->ts_count,
447 *h->from_where);
448
449
450
451
452
453 if (h->priv->ule_skb) {
454 h->error = true;
455 dev_kfree_skb(h->priv->ule_skb);
456 }
457
458 if (h->error || h->priv->ule_sndu_remain) {
459 h->dev->stats.rx_errors++;
460 h->dev->stats.rx_frame_errors++;
461 h->error = false;
462 }
463
464 reset_ule(h->priv);
465 h->priv->need_pusi = 1;
466 return 1;
467 }
468
469
470
471
472 h->from_where += 1;
473 h->ts_remain -= 1;
474 } else
475 h->priv->need_pusi = 0;
476
477 if (h->priv->ule_sndu_remain > 183) {
478
479
480
481
482 h->dev->stats.rx_errors++;
483 h->dev->stats.rx_length_errors++;
484 pr_warn("%lu: Expected %d more SNDU bytes, but got PUSI (pf %d, h->ts_remain %d). Flushing incomplete payload.\n",
485 h->priv->ts_count,
486 h->priv->ule_sndu_remain,
487 h->ts[4], h->ts_remain);
488 dev_kfree_skb(h->priv->ule_skb);
489
490 reset_ule(h->priv);
491
492
493
494
495 h->from_where += h->ts[4];
496 h->ts_remain -= h->ts[4];
497 }
498 }
499 return 0;
500}
501
502
503
504
505
506
507
508
509
510static int dvb_net_ule_new_payload(struct dvb_net_ule_handle *h)
511{
512 if (h->ts_remain < 2) {
513 pr_warn("Invalid payload packing: only %d bytes left in TS. Resyncing.\n",
514 h->ts_remain);
515 h->priv->ule_sndu_len = 0;
516 h->priv->need_pusi = 1;
517 h->ts += TS_SZ;
518 return 1;
519 }
520
521 if (!h->priv->ule_sndu_len) {
522
523 h->priv->ule_sndu_len = h->from_where[0] << 8 |
524 h->from_where[1];
525 if (h->priv->ule_sndu_len & 0x8000) {
526
527 h->priv->ule_sndu_len &= 0x7FFF;
528 h->priv->ule_dbit = 1;
529 } else
530 h->priv->ule_dbit = 0;
531
532 if (h->priv->ule_sndu_len < 5) {
533 pr_warn("%lu: Invalid ULE SNDU length %u. Resyncing.\n",
534 h->priv->ts_count,
535 h->priv->ule_sndu_len);
536 h->dev->stats.rx_errors++;
537 h->dev->stats.rx_length_errors++;
538 h->priv->ule_sndu_len = 0;
539 h->priv->need_pusi = 1;
540 h->new_ts = 1;
541 h->ts += TS_SZ;
542 h->priv->ts_count++;
543 return 1;
544 }
545 h->ts_remain -= 2;
546 h->from_where += 2;
547 }
548
549 h->priv->ule_sndu_remain = h->priv->ule_sndu_len + 2;
550
551
552
553
554
555
556
557 switch (h->ts_remain) {
558 case 1:
559 h->priv->ule_sndu_remain--;
560 h->priv->ule_sndu_type = h->from_where[0] << 8;
561
562
563 h->priv->ule_sndu_type_1 = 1;
564 h->ts_remain -= 1;
565 h->from_where += 1;
566
567 case 0:
568 h->new_ts = 1;
569 h->ts += TS_SZ;
570 h->priv->ts_count++;
571 return 1;
572
573 default:
574
575 if (h->priv->ule_sndu_type_1) {
576 h->priv->ule_sndu_type_1 = 0;
577 h->priv->ule_sndu_type |= h->from_where[0];
578 h->from_where += 1;
579 h->ts_remain -= 1;
580 } else {
581
582 h->priv->ule_sndu_type = h->from_where[0] << 8 |
583 h->from_where[1];
584 h->from_where += 2;
585 h->ts_remain -= 2;
586 }
587 break;
588 }
589
590
591
592
593
594
595
596
597 h->priv->ule_skb = dev_alloc_skb(h->priv->ule_sndu_len +
598 ETH_HLEN + ETH_ALEN);
599 if (!h->priv->ule_skb) {
600 pr_notice("%s: Memory squeeze, dropping packet.\n",
601 h->dev->name);
602 h->dev->stats.rx_dropped++;
603 return -1;
604 }
605
606
607 h->priv->ule_sndu_remain = h->priv->ule_sndu_len;
608 h->priv->ule_skb->dev = h->dev;
609
610
611
612
613 skb_reserve(h->priv->ule_skb, ETH_HLEN + ETH_ALEN);
614
615 return 0;
616}
617
618
619static int dvb_net_ule_should_drop(struct dvb_net_ule_handle *h)
620{
621 static const u8 bc_addr[ETH_ALEN] = { [0 ... ETH_ALEN - 1] = 0xff };
622
623
624
625
626
627
628
629 if (h->priv->rx_mode == RX_MODE_PROMISC)
630 return 0;
631
632 if (h->priv->ule_skb->data[0] & 0x01) {
633
634 if (!ether_addr_equal(h->priv->ule_skb->data, bc_addr)) {
635
636 if (h->priv->rx_mode == RX_MODE_MULTI) {
637 int i;
638
639 for (i = 0; i < h->priv->multi_num &&
640 !ether_addr_equal(h->priv->ule_skb->data,
641 h->priv->multi_macs[i]);
642 i++)
643 ;
644 if (i == h->priv->multi_num)
645 return 1;
646 } else if (h->priv->rx_mode != RX_MODE_ALL_MULTI)
647 return 1;
648
649
650
651
652 }
653
654 } else if (!ether_addr_equal(h->priv->ule_skb->data, h->dev->dev_addr))
655 return 1;
656
657 return 0;
658}
659
660
661static void dvb_net_ule_check_crc(struct dvb_net_ule_handle *h,
662 u32 ule_crc, u32 expected_crc)
663{
664 u8 dest_addr[ETH_ALEN];
665
666 if (ule_crc != expected_crc) {
667 pr_warn("%lu: CRC32 check FAILED: %08x / %08x, SNDU len %d type %#x, ts_remain %d, next 2: %x.\n",
668 h->priv->ts_count, ule_crc, expected_crc,
669 h->priv->ule_sndu_len, h->priv->ule_sndu_type,
670 h->ts_remain,
671 h->ts_remain > 2 ?
672 *(unsigned short *)h->from_where : 0);
673
674 #ifdef ULE_DEBUG
675 hexdump(iov[0].iov_base, iov[0].iov_len);
676 hexdump(iov[1].iov_base, iov[1].iov_len);
677 hexdump(iov[2].iov_base, iov[2].iov_len);
678
679 if (h->ule_where == h->ule_hist) {
680 hexdump(&h->ule_hist[98*TS_SZ], TS_SZ);
681 hexdump(&h->ule_hist[99*TS_SZ], TS_SZ);
682 } else if (h->ule_where == &h->ule_hist[TS_SZ]) {
683 hexdump(&h->ule_hist[99*TS_SZ], TS_SZ);
684 hexdump(h->ule_hist, TS_SZ);
685 } else {
686 hexdump(h->ule_where - TS_SZ - TS_SZ, TS_SZ);
687 hexdump(h->ule_where - TS_SZ, TS_SZ);
688 }
689 h->ule_dump = 1;
690 #endif
691
692 h->dev->stats.rx_errors++;
693 h->dev->stats.rx_crc_errors++;
694 dev_kfree_skb(h->priv->ule_skb);
695
696 return;
697 }
698
699
700
701
702 h->priv->ule_skb->tail -= 4;
703 h->priv->ule_skb->len -= 4;
704
705 if (!h->priv->ule_dbit) {
706 if (dvb_net_ule_should_drop(h)) {
707#ifdef ULE_DEBUG
708 netdev_dbg(h->dev,
709 "Dropping SNDU: MAC destination address does not match: dest addr: %pM, h->dev addr: %pM\n",
710 h->priv->ule_skb->data, h->dev->dev_addr);
711#endif
712 dev_kfree_skb(h->priv->ule_skb);
713 return;
714 }
715
716 skb_copy_from_linear_data(h->priv->ule_skb, dest_addr,
717 ETH_ALEN);
718 skb_pull(h->priv->ule_skb, ETH_ALEN);
719 } else {
720
721 eth_zero_addr(dest_addr);
722 }
723
724
725 if (h->priv->ule_sndu_type < ETH_P_802_3_MIN) {
726
727 int l = handle_ule_extensions(h->priv);
728
729 if (l < 0) {
730
731
732
733
734
735
736 dev_kfree_skb(h->priv->ule_skb);
737 return;
738 }
739 skb_pull(h->priv->ule_skb, l);
740 }
741
742
743
744
745
746
747
748
749
750 if (!h->priv->ule_bridged) {
751 skb_push(h->priv->ule_skb, ETH_HLEN);
752 h->ethh = (struct ethhdr *)h->priv->ule_skb->data;
753 memcpy(h->ethh->h_dest, dest_addr, ETH_ALEN);
754 eth_zero_addr(h->ethh->h_source);
755 h->ethh->h_proto = htons(h->priv->ule_sndu_type);
756 }
757
758 h->priv->ule_bridged = 0;
759
760
761 h->priv->ule_skb->protocol = dvb_net_eth_type_trans(h->priv->ule_skb,
762 h->dev);
763
764
765
766
767#if 0
768 if (h->priv->ule_dbit && skb->pkt_type == PACKET_OTHERHOST)
769 h->priv->ule_skb->pkt_type = PACKET_HOST;
770#endif
771 h->dev->stats.rx_packets++;
772 h->dev->stats.rx_bytes += h->priv->ule_skb->len;
773 netif_rx(h->priv->ule_skb);
774}
775
776static void dvb_net_ule(struct net_device *dev, const u8 *buf, size_t buf_len)
777{
778 int ret;
779 struct dvb_net_ule_handle h = {
780 .dev = dev,
781 .buf = buf,
782 .buf_len = buf_len,
783 .skipped = 0L,
784 .ts = NULL,
785 .ts_end = NULL,
786 .from_where = NULL,
787 .ts_remain = 0,
788 .how_much = 0,
789 .new_ts = 1,
790 .ethh = NULL,
791 .error = false,
792#ifdef ULE_DEBUG
793 .ule_where = ule_hist,
794#endif
795 };
796
797
798
799
800
801 for (h.ts = h.buf, h.ts_end = h.buf + h.buf_len;
802 h.ts < h.ts_end; ) {
803 if (h.new_ts) {
804
805 if (dvb_net_ule_new_ts_cell(&h))
806 continue;
807 }
808
809
810 if (h.priv->need_pusi) {
811 if (dvb_net_ule_ts_pusi(&h))
812 continue;
813 }
814
815 if (h.new_ts) {
816 if (dvb_net_ule_new_ts(&h))
817 continue;
818 }
819
820
821 if (h.priv->ule_skb == NULL) {
822 ret = dvb_net_ule_new_payload(&h);
823 if (ret < 0)
824 return;
825 if (ret)
826 continue;
827 }
828
829
830 h.how_much = min(h.priv->ule_sndu_remain, (int)h.ts_remain);
831 skb_put_data(h.priv->ule_skb, h.from_where, h.how_much);
832 h.priv->ule_sndu_remain -= h.how_much;
833 h.ts_remain -= h.how_much;
834 h.from_where += h.how_much;
835
836
837 if (h.priv->ule_sndu_remain <= 0) {
838
839 __be16 ulen = htons(h.priv->ule_sndu_len);
840 __be16 utype = htons(h.priv->ule_sndu_type);
841 const u8 *tail;
842 struct kvec iov[3] = {
843 { &ulen, sizeof ulen },
844 { &utype, sizeof utype },
845 { h.priv->ule_skb->data,
846 h.priv->ule_skb->len - 4 }
847 };
848 u32 ule_crc = ~0L, expected_crc;
849 if (h.priv->ule_dbit) {
850
851
852 ulen |= htons(0x8000);
853 }
854
855 ule_crc = iov_crc32(ule_crc, iov, 3);
856 tail = skb_tail_pointer(h.priv->ule_skb);
857 expected_crc = *(tail - 4) << 24 |
858 *(tail - 3) << 16 |
859 *(tail - 2) << 8 |
860 *(tail - 1);
861
862 dvb_net_ule_check_crc(&h, ule_crc, expected_crc);
863
864
865 reset_ule(h.priv);
866 }
867
868
869 if (h.ts_remain >= 2 && *((unsigned short *)h.from_where) != 0xFFFF) {
870
871 h.new_ts = 0;
872 h.priv->ule_skb = NULL;
873 h.priv->ule_sndu_type_1 = 0;
874 h.priv->ule_sndu_len = 0;
875
876
877
878
879
880 } else {
881 h.new_ts = 1;
882 h.ts += TS_SZ;
883 h.priv->ts_count++;
884 if (h.priv->ule_skb == NULL) {
885 h.priv->need_pusi = 1;
886 h.priv->ule_sndu_type_1 = 0;
887 h.priv->ule_sndu_len = 0;
888 }
889 }
890 }
891}
892
893static int dvb_net_ts_callback(const u8 *buffer1, size_t buffer1_len,
894 const u8 *buffer2, size_t buffer2_len,
895 struct dmx_ts_feed *feed)
896{
897 struct net_device *dev = feed->priv;
898
899 if (buffer2)
900 pr_warn("buffer2 not NULL: %p.\n", buffer2);
901 if (buffer1_len > 32768)
902 pr_warn("length > 32k: %zu.\n", buffer1_len);
903
904
905 dvb_net_ule(dev, buffer1, buffer1_len);
906 return 0;
907}
908
909
910static void dvb_net_sec(struct net_device *dev,
911 const u8 *pkt, int pkt_len)
912{
913 u8 *eth;
914 struct sk_buff *skb;
915 struct net_device_stats *stats = &dev->stats;
916 int snap = 0;
917
918
919 if (pkt_len < 16) {
920 pr_warn("%s: IP/MPE packet length = %d too small.\n",
921 dev->name, pkt_len);
922 stats->rx_errors++;
923 stats->rx_length_errors++;
924 return;
925 }
926
927
928#if 0
929 if ((pkt[5] & 0xfd) != 0xc1) {
930
931#else
932 if ((pkt[5] & 0x3c) != 0x00) {
933
934#endif
935 stats->rx_errors++;
936 stats->rx_crc_errors++;
937 return;
938 }
939 if (pkt[5] & 0x02) {
940
941 if (pkt_len < 24 || memcmp(&pkt[12], "\xaa\xaa\x03\0\0\0", 6)) {
942 stats->rx_dropped++;
943 return;
944 }
945 snap = 8;
946 }
947 if (pkt[7]) {
948
949 stats->rx_errors++;
950 stats->rx_frame_errors++;
951 return;
952 }
953
954
955
956
957 if (!(skb = dev_alloc_skb(pkt_len - 4 - 12 + 14 + 2 - snap))) {
958
959 stats->rx_dropped++;
960 return;
961 }
962 skb_reserve(skb, 2);
963 skb->dev = dev;
964
965
966 eth = skb_put(skb, pkt_len - 12 - 4 + 14 - snap);
967 memcpy(eth + 14, pkt + 12 + snap, pkt_len - 12 - 4 - snap);
968
969
970 eth[0]=pkt[0x0b];
971 eth[1]=pkt[0x0a];
972 eth[2]=pkt[0x09];
973 eth[3]=pkt[0x08];
974 eth[4]=pkt[0x04];
975 eth[5]=pkt[0x03];
976
977 eth[6]=eth[7]=eth[8]=eth[9]=eth[10]=eth[11]=0;
978
979 if (snap) {
980 eth[12] = pkt[18];
981 eth[13] = pkt[19];
982 } else {
983
984
985
986 if (pkt[12] >> 4 == 6) {
987 eth[12] = 0x86;
988 eth[13] = 0xdd;
989 } else {
990 eth[12] = 0x08;
991 eth[13] = 0x00;
992 }
993 }
994
995 skb->protocol = dvb_net_eth_type_trans(skb, dev);
996
997 stats->rx_packets++;
998 stats->rx_bytes+=skb->len;
999 netif_rx(skb);
1000}
1001
1002static int dvb_net_sec_callback(const u8 *buffer1, size_t buffer1_len,
1003 const u8 *buffer2, size_t buffer2_len,
1004 struct dmx_section_filter *filter)
1005{
1006 struct net_device *dev = filter->priv;
1007
1008
1009
1010
1011
1012 dvb_net_sec (dev, buffer1, buffer1_len);
1013 return 0;
1014}
1015
1016static int dvb_net_tx(struct sk_buff *skb, struct net_device *dev)
1017{
1018 dev_kfree_skb(skb);
1019 return NETDEV_TX_OK;
1020}
1021
1022static u8 mask_normal[6]={0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
1023static u8 mask_allmulti[6]={0xff, 0xff, 0xff, 0x00, 0x00, 0x00};
1024static u8 mac_allmulti[6]={0x01, 0x00, 0x5e, 0x00, 0x00, 0x00};
1025static u8 mask_promisc[6]={0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
1026
1027static int dvb_net_filter_sec_set(struct net_device *dev,
1028 struct dmx_section_filter **secfilter,
1029 u8 *mac, u8 *mac_mask)
1030{
1031 struct dvb_net_priv *priv = netdev_priv(dev);
1032 int ret;
1033
1034 *secfilter=NULL;
1035 ret = priv->secfeed->allocate_filter(priv->secfeed, secfilter);
1036 if (ret<0) {
1037 pr_err("%s: could not get filter\n", dev->name);
1038 return ret;
1039 }
1040
1041 (*secfilter)->priv=(void *) dev;
1042
1043 memset((*secfilter)->filter_value, 0x00, DMX_MAX_FILTER_SIZE);
1044 memset((*secfilter)->filter_mask, 0x00, DMX_MAX_FILTER_SIZE);
1045 memset((*secfilter)->filter_mode, 0xff, DMX_MAX_FILTER_SIZE);
1046
1047 (*secfilter)->filter_value[0]=0x3e;
1048 (*secfilter)->filter_value[3]=mac[5];
1049 (*secfilter)->filter_value[4]=mac[4];
1050 (*secfilter)->filter_value[8]=mac[3];
1051 (*secfilter)->filter_value[9]=mac[2];
1052 (*secfilter)->filter_value[10]=mac[1];
1053 (*secfilter)->filter_value[11]=mac[0];
1054
1055 (*secfilter)->filter_mask[0] = 0xff;
1056 (*secfilter)->filter_mask[3] = mac_mask[5];
1057 (*secfilter)->filter_mask[4] = mac_mask[4];
1058 (*secfilter)->filter_mask[8] = mac_mask[3];
1059 (*secfilter)->filter_mask[9] = mac_mask[2];
1060 (*secfilter)->filter_mask[10] = mac_mask[1];
1061 (*secfilter)->filter_mask[11]=mac_mask[0];
1062
1063 netdev_dbg(dev, "filter mac=%pM mask=%pM\n", mac, mac_mask);
1064
1065 return 0;
1066}
1067
1068static int dvb_net_feed_start(struct net_device *dev)
1069{
1070 int ret = 0, i;
1071 struct dvb_net_priv *priv = netdev_priv(dev);
1072 struct dmx_demux *demux = priv->demux;
1073 unsigned char *mac = (unsigned char *) dev->dev_addr;
1074
1075 netdev_dbg(dev, "rx_mode %i\n", priv->rx_mode);
1076 mutex_lock(&priv->mutex);
1077 if (priv->tsfeed || priv->secfeed || priv->secfilter || priv->multi_secfilter[0])
1078 pr_err("%s: BUG %d\n", __func__, __LINE__);
1079
1080 priv->secfeed=NULL;
1081 priv->secfilter=NULL;
1082 priv->tsfeed = NULL;
1083
1084 if (priv->feedtype == DVB_NET_FEEDTYPE_MPE) {
1085 netdev_dbg(dev, "alloc secfeed\n");
1086 ret=demux->allocate_section_feed(demux, &priv->secfeed,
1087 dvb_net_sec_callback);
1088 if (ret<0) {
1089 pr_err("%s: could not allocate section feed\n",
1090 dev->name);
1091 goto error;
1092 }
1093
1094 ret = priv->secfeed->set(priv->secfeed, priv->pid, 1);
1095
1096 if (ret<0) {
1097 pr_err("%s: could not set section feed\n", dev->name);
1098 priv->demux->release_section_feed(priv->demux, priv->secfeed);
1099 priv->secfeed=NULL;
1100 goto error;
1101 }
1102
1103 if (priv->rx_mode != RX_MODE_PROMISC) {
1104 netdev_dbg(dev, "set secfilter\n");
1105 dvb_net_filter_sec_set(dev, &priv->secfilter, mac, mask_normal);
1106 }
1107
1108 switch (priv->rx_mode) {
1109 case RX_MODE_MULTI:
1110 for (i = 0; i < priv->multi_num; i++) {
1111 netdev_dbg(dev, "set multi_secfilter[%d]\n", i);
1112 dvb_net_filter_sec_set(dev, &priv->multi_secfilter[i],
1113 priv->multi_macs[i], mask_normal);
1114 }
1115 break;
1116 case RX_MODE_ALL_MULTI:
1117 priv->multi_num=1;
1118 netdev_dbg(dev, "set multi_secfilter[0]\n");
1119 dvb_net_filter_sec_set(dev, &priv->multi_secfilter[0],
1120 mac_allmulti, mask_allmulti);
1121 break;
1122 case RX_MODE_PROMISC:
1123 priv->multi_num=0;
1124 netdev_dbg(dev, "set secfilter\n");
1125 dvb_net_filter_sec_set(dev, &priv->secfilter, mac, mask_promisc);
1126 break;
1127 }
1128
1129 netdev_dbg(dev, "start filtering\n");
1130 priv->secfeed->start_filtering(priv->secfeed);
1131 } else if (priv->feedtype == DVB_NET_FEEDTYPE_ULE) {
1132 ktime_t timeout = ns_to_ktime(10 * NSEC_PER_MSEC);
1133
1134
1135 netdev_dbg(dev, "alloc tsfeed\n");
1136 ret = demux->allocate_ts_feed(demux, &priv->tsfeed, dvb_net_ts_callback);
1137 if (ret < 0) {
1138 pr_err("%s: could not allocate ts feed\n", dev->name);
1139 goto error;
1140 }
1141
1142
1143 priv->tsfeed->priv = (void *)dev;
1144 ret = priv->tsfeed->set(priv->tsfeed,
1145 priv->pid,
1146 TS_PACKET,
1147 DMX_PES_OTHER,
1148 timeout
1149 );
1150
1151 if (ret < 0) {
1152 pr_err("%s: could not set ts feed\n", dev->name);
1153 priv->demux->release_ts_feed(priv->demux, priv->tsfeed);
1154 priv->tsfeed = NULL;
1155 goto error;
1156 }
1157
1158 netdev_dbg(dev, "start filtering\n");
1159 priv->tsfeed->start_filtering(priv->tsfeed);
1160 } else
1161 ret = -EINVAL;
1162
1163error:
1164 mutex_unlock(&priv->mutex);
1165 return ret;
1166}
1167
1168static int dvb_net_feed_stop(struct net_device *dev)
1169{
1170 struct dvb_net_priv *priv = netdev_priv(dev);
1171 int i, ret = 0;
1172
1173 mutex_lock(&priv->mutex);
1174 if (priv->feedtype == DVB_NET_FEEDTYPE_MPE) {
1175 if (priv->secfeed) {
1176 if (priv->secfeed->is_filtering) {
1177 netdev_dbg(dev, "stop secfeed\n");
1178 priv->secfeed->stop_filtering(priv->secfeed);
1179 }
1180
1181 if (priv->secfilter) {
1182 netdev_dbg(dev, "release secfilter\n");
1183 priv->secfeed->release_filter(priv->secfeed,
1184 priv->secfilter);
1185 priv->secfilter=NULL;
1186 }
1187
1188 for (i=0; i<priv->multi_num; i++) {
1189 if (priv->multi_secfilter[i]) {
1190 netdev_dbg(dev, "release multi_filter[%d]\n",
1191 i);
1192 priv->secfeed->release_filter(priv->secfeed,
1193 priv->multi_secfilter[i]);
1194 priv->multi_secfilter[i] = NULL;
1195 }
1196 }
1197
1198 priv->demux->release_section_feed(priv->demux, priv->secfeed);
1199 priv->secfeed = NULL;
1200 } else
1201 pr_err("%s: no feed to stop\n", dev->name);
1202 } else if (priv->feedtype == DVB_NET_FEEDTYPE_ULE) {
1203 if (priv->tsfeed) {
1204 if (priv->tsfeed->is_filtering) {
1205 netdev_dbg(dev, "stop tsfeed\n");
1206 priv->tsfeed->stop_filtering(priv->tsfeed);
1207 }
1208 priv->demux->release_ts_feed(priv->demux, priv->tsfeed);
1209 priv->tsfeed = NULL;
1210 }
1211 else
1212 pr_err("%s: no ts feed to stop\n", dev->name);
1213 } else
1214 ret = -EINVAL;
1215 mutex_unlock(&priv->mutex);
1216 return ret;
1217}
1218
1219
1220static int dvb_set_mc_filter(struct net_device *dev, unsigned char *addr)
1221{
1222 struct dvb_net_priv *priv = netdev_priv(dev);
1223
1224 if (priv->multi_num == DVB_NET_MULTICAST_MAX)
1225 return -ENOMEM;
1226
1227 memcpy(priv->multi_macs[priv->multi_num], addr, ETH_ALEN);
1228
1229 priv->multi_num++;
1230 return 0;
1231}
1232
1233
1234static void wq_set_multicast_list (struct work_struct *work)
1235{
1236 struct dvb_net_priv *priv =
1237 container_of(work, struct dvb_net_priv, set_multicast_list_wq);
1238 struct net_device *dev = priv->net;
1239
1240 dvb_net_feed_stop(dev);
1241 priv->rx_mode = RX_MODE_UNI;
1242 netif_addr_lock_bh(dev);
1243
1244 if (dev->flags & IFF_PROMISC) {
1245 netdev_dbg(dev, "promiscuous mode\n");
1246 priv->rx_mode = RX_MODE_PROMISC;
1247 } else if ((dev->flags & IFF_ALLMULTI)) {
1248 netdev_dbg(dev, "allmulti mode\n");
1249 priv->rx_mode = RX_MODE_ALL_MULTI;
1250 } else if (!netdev_mc_empty(dev)) {
1251 struct netdev_hw_addr *ha;
1252
1253 netdev_dbg(dev, "set_mc_list, %d entries\n",
1254 netdev_mc_count(dev));
1255
1256 priv->rx_mode = RX_MODE_MULTI;
1257 priv->multi_num = 0;
1258
1259 netdev_for_each_mc_addr(ha, dev)
1260 dvb_set_mc_filter(dev, ha->addr);
1261 }
1262
1263 netif_addr_unlock_bh(dev);
1264 dvb_net_feed_start(dev);
1265}
1266
1267
1268static void dvb_net_set_multicast_list (struct net_device *dev)
1269{
1270 struct dvb_net_priv *priv = netdev_priv(dev);
1271 schedule_work(&priv->set_multicast_list_wq);
1272}
1273
1274
1275static void wq_restart_net_feed (struct work_struct *work)
1276{
1277 struct dvb_net_priv *priv =
1278 container_of(work, struct dvb_net_priv, restart_net_feed_wq);
1279 struct net_device *dev = priv->net;
1280
1281 if (netif_running(dev)) {
1282 dvb_net_feed_stop(dev);
1283 dvb_net_feed_start(dev);
1284 }
1285}
1286
1287
1288static int dvb_net_set_mac (struct net_device *dev, void *p)
1289{
1290 struct dvb_net_priv *priv = netdev_priv(dev);
1291 struct sockaddr *addr=p;
1292
1293 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1294
1295 if (netif_running(dev))
1296 schedule_work(&priv->restart_net_feed_wq);
1297
1298 return 0;
1299}
1300
1301
1302static int dvb_net_open(struct net_device *dev)
1303{
1304 struct dvb_net_priv *priv = netdev_priv(dev);
1305
1306 priv->in_use++;
1307 dvb_net_feed_start(dev);
1308 return 0;
1309}
1310
1311
1312static int dvb_net_stop(struct net_device *dev)
1313{
1314 struct dvb_net_priv *priv = netdev_priv(dev);
1315
1316 priv->in_use--;
1317 return dvb_net_feed_stop(dev);
1318}
1319
1320static const struct header_ops dvb_header_ops = {
1321 .create = eth_header,
1322 .parse = eth_header_parse,
1323};
1324
1325
1326static const struct net_device_ops dvb_netdev_ops = {
1327 .ndo_open = dvb_net_open,
1328 .ndo_stop = dvb_net_stop,
1329 .ndo_start_xmit = dvb_net_tx,
1330 .ndo_set_rx_mode = dvb_net_set_multicast_list,
1331 .ndo_set_mac_address = dvb_net_set_mac,
1332 .ndo_validate_addr = eth_validate_addr,
1333};
1334
1335static void dvb_net_setup(struct net_device *dev)
1336{
1337 ether_setup(dev);
1338
1339 dev->header_ops = &dvb_header_ops;
1340 dev->netdev_ops = &dvb_netdev_ops;
1341 dev->mtu = 4096;
1342 dev->max_mtu = 4096;
1343
1344 dev->flags |= IFF_NOARP;
1345}
1346
1347static int get_if(struct dvb_net *dvbnet)
1348{
1349 int i;
1350
1351 for (i=0; i<DVB_NET_DEVICES_MAX; i++)
1352 if (!dvbnet->state[i])
1353 break;
1354
1355 if (i == DVB_NET_DEVICES_MAX)
1356 return -1;
1357
1358 dvbnet->state[i]=1;
1359 return i;
1360}
1361
1362static int dvb_net_add_if(struct dvb_net *dvbnet, u16 pid, u8 feedtype)
1363{
1364 struct net_device *net;
1365 struct dvb_net_priv *priv;
1366 int result;
1367 int if_num;
1368
1369 if (feedtype != DVB_NET_FEEDTYPE_MPE && feedtype != DVB_NET_FEEDTYPE_ULE)
1370 return -EINVAL;
1371 if ((if_num = get_if(dvbnet)) < 0)
1372 return -EINVAL;
1373
1374 net = alloc_netdev(sizeof(struct dvb_net_priv), "dvb",
1375 NET_NAME_UNKNOWN, dvb_net_setup);
1376 if (!net)
1377 return -ENOMEM;
1378
1379 if (dvbnet->dvbdev->id)
1380 snprintf(net->name, IFNAMSIZ, "dvb%d%u%d",
1381 dvbnet->dvbdev->adapter->num, dvbnet->dvbdev->id, if_num);
1382 else
1383
1384 snprintf(net->name, IFNAMSIZ, "dvb%d_%d",
1385 dvbnet->dvbdev->adapter->num, if_num);
1386
1387 net->addr_len = 6;
1388 memcpy(net->dev_addr, dvbnet->dvbdev->adapter->proposed_mac, 6);
1389
1390 dvbnet->device[if_num] = net;
1391
1392 priv = netdev_priv(net);
1393 priv->net = net;
1394 priv->demux = dvbnet->demux;
1395 priv->pid = pid;
1396 priv->rx_mode = RX_MODE_UNI;
1397 priv->need_pusi = 1;
1398 priv->tscc = 0;
1399 priv->feedtype = feedtype;
1400 reset_ule(priv);
1401
1402 INIT_WORK(&priv->set_multicast_list_wq, wq_set_multicast_list);
1403 INIT_WORK(&priv->restart_net_feed_wq, wq_restart_net_feed);
1404 mutex_init(&priv->mutex);
1405
1406 net->base_addr = pid;
1407
1408 if ((result = register_netdev(net)) < 0) {
1409 dvbnet->device[if_num] = NULL;
1410 free_netdev(net);
1411 return result;
1412 }
1413 pr_info("created network interface %s\n", net->name);
1414
1415 return if_num;
1416}
1417
1418static int dvb_net_remove_if(struct dvb_net *dvbnet, unsigned long num)
1419{
1420 struct net_device *net = dvbnet->device[num];
1421 struct dvb_net_priv *priv;
1422
1423 if (!dvbnet->state[num])
1424 return -EINVAL;
1425 priv = netdev_priv(net);
1426 if (priv->in_use)
1427 return -EBUSY;
1428
1429 dvb_net_stop(net);
1430 flush_work(&priv->set_multicast_list_wq);
1431 flush_work(&priv->restart_net_feed_wq);
1432 pr_info("removed network interface %s\n", net->name);
1433 unregister_netdev(net);
1434 dvbnet->state[num]=0;
1435 dvbnet->device[num] = NULL;
1436 free_netdev(net);
1437
1438 return 0;
1439}
1440
1441static int dvb_net_do_ioctl(struct file *file,
1442 unsigned int cmd, void *parg)
1443{
1444 struct dvb_device *dvbdev = file->private_data;
1445 struct dvb_net *dvbnet = dvbdev->priv;
1446 int ret = 0;
1447
1448 if (((file->f_flags&O_ACCMODE)==O_RDONLY))
1449 return -EPERM;
1450
1451 if (mutex_lock_interruptible(&dvbnet->ioctl_mutex))
1452 return -ERESTARTSYS;
1453
1454 switch (cmd) {
1455 case NET_ADD_IF:
1456 {
1457 struct dvb_net_if *dvbnetif = parg;
1458 int result;
1459
1460 if (!capable(CAP_SYS_ADMIN)) {
1461 ret = -EPERM;
1462 goto ioctl_error;
1463 }
1464
1465 if (!try_module_get(dvbdev->adapter->module)) {
1466 ret = -EPERM;
1467 goto ioctl_error;
1468 }
1469
1470 result=dvb_net_add_if(dvbnet, dvbnetif->pid, dvbnetif->feedtype);
1471 if (result<0) {
1472 module_put(dvbdev->adapter->module);
1473 ret = result;
1474 goto ioctl_error;
1475 }
1476 dvbnetif->if_num=result;
1477 break;
1478 }
1479 case NET_GET_IF:
1480 {
1481 struct net_device *netdev;
1482 struct dvb_net_priv *priv_data;
1483 struct dvb_net_if *dvbnetif = parg;
1484
1485 if (dvbnetif->if_num >= DVB_NET_DEVICES_MAX ||
1486 !dvbnet->state[dvbnetif->if_num]) {
1487 ret = -EINVAL;
1488 goto ioctl_error;
1489 }
1490
1491 netdev = dvbnet->device[dvbnetif->if_num];
1492
1493 priv_data = netdev_priv(netdev);
1494 dvbnetif->pid=priv_data->pid;
1495 dvbnetif->feedtype=priv_data->feedtype;
1496 break;
1497 }
1498 case NET_REMOVE_IF:
1499 {
1500 if (!capable(CAP_SYS_ADMIN)) {
1501 ret = -EPERM;
1502 goto ioctl_error;
1503 }
1504 if ((unsigned long) parg >= DVB_NET_DEVICES_MAX) {
1505 ret = -EINVAL;
1506 goto ioctl_error;
1507 }
1508 ret = dvb_net_remove_if(dvbnet, (unsigned long) parg);
1509 if (!ret)
1510 module_put(dvbdev->adapter->module);
1511 break;
1512 }
1513
1514
1515 case __NET_ADD_IF_OLD:
1516 {
1517 struct __dvb_net_if_old *dvbnetif = parg;
1518 int result;
1519
1520 if (!capable(CAP_SYS_ADMIN)) {
1521 ret = -EPERM;
1522 goto ioctl_error;
1523 }
1524
1525 if (!try_module_get(dvbdev->adapter->module)) {
1526 ret = -EPERM;
1527 goto ioctl_error;
1528 }
1529
1530 result=dvb_net_add_if(dvbnet, dvbnetif->pid, DVB_NET_FEEDTYPE_MPE);
1531 if (result<0) {
1532 module_put(dvbdev->adapter->module);
1533 ret = result;
1534 goto ioctl_error;
1535 }
1536 dvbnetif->if_num=result;
1537 break;
1538 }
1539 case __NET_GET_IF_OLD:
1540 {
1541 struct net_device *netdev;
1542 struct dvb_net_priv *priv_data;
1543 struct __dvb_net_if_old *dvbnetif = parg;
1544
1545 if (dvbnetif->if_num >= DVB_NET_DEVICES_MAX ||
1546 !dvbnet->state[dvbnetif->if_num]) {
1547 ret = -EINVAL;
1548 goto ioctl_error;
1549 }
1550
1551 netdev = dvbnet->device[dvbnetif->if_num];
1552
1553 priv_data = netdev_priv(netdev);
1554 dvbnetif->pid=priv_data->pid;
1555 break;
1556 }
1557 default:
1558 ret = -ENOTTY;
1559 break;
1560 }
1561
1562ioctl_error:
1563 mutex_unlock(&dvbnet->ioctl_mutex);
1564 return ret;
1565}
1566
1567static long dvb_net_ioctl(struct file *file,
1568 unsigned int cmd, unsigned long arg)
1569{
1570 return dvb_usercopy(file, cmd, arg, dvb_net_do_ioctl);
1571}
1572
1573static int dvb_net_close(struct inode *inode, struct file *file)
1574{
1575 struct dvb_device *dvbdev = file->private_data;
1576 struct dvb_net *dvbnet = dvbdev->priv;
1577
1578 dvb_generic_release(inode, file);
1579
1580 if(dvbdev->users == 1 && dvbnet->exit == 1)
1581 wake_up(&dvbdev->wait_queue);
1582 return 0;
1583}
1584
1585
1586static const struct file_operations dvb_net_fops = {
1587 .owner = THIS_MODULE,
1588 .unlocked_ioctl = dvb_net_ioctl,
1589 .open = dvb_generic_open,
1590 .release = dvb_net_close,
1591 .llseek = noop_llseek,
1592};
1593
1594static const struct dvb_device dvbdev_net = {
1595 .priv = NULL,
1596 .users = 1,
1597 .writers = 1,
1598#if defined(CONFIG_MEDIA_CONTROLLER_DVB)
1599 .name = "dvb-net",
1600#endif
1601 .fops = &dvb_net_fops,
1602};
1603
1604void dvb_net_release (struct dvb_net *dvbnet)
1605{
1606 int i;
1607
1608 dvbnet->exit = 1;
1609 if (dvbnet->dvbdev->users < 1)
1610 wait_event(dvbnet->dvbdev->wait_queue,
1611 dvbnet->dvbdev->users==1);
1612
1613 dvb_unregister_device(dvbnet->dvbdev);
1614
1615 for (i=0; i<DVB_NET_DEVICES_MAX; i++) {
1616 if (!dvbnet->state[i])
1617 continue;
1618 dvb_net_remove_if(dvbnet, i);
1619 }
1620}
1621EXPORT_SYMBOL(dvb_net_release);
1622
1623
1624int dvb_net_init (struct dvb_adapter *adap, struct dvb_net *dvbnet,
1625 struct dmx_demux *dmx)
1626{
1627 int i;
1628
1629 mutex_init(&dvbnet->ioctl_mutex);
1630 dvbnet->demux = dmx;
1631
1632 for (i=0; i<DVB_NET_DEVICES_MAX; i++)
1633 dvbnet->state[i] = 0;
1634
1635 return dvb_register_device(adap, &dvbnet->dvbdev, &dvbdev_net,
1636 dvbnet, DVB_DEVICE_NET, 0);
1637}
1638EXPORT_SYMBOL(dvb_net_init);
1639