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treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / drivers / media / dvb-core / dvb_net.c
blob630509ecee2051831da6011112a23f72b8930849
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * dvb_net.c
4 *
5 * Copyright (C) 2001 Convergence integrated media GmbH
6 * Ralph Metzler <ralph@convergence.de>
7 * Copyright (C) 2002 Ralph Metzler <rjkm@metzlerbros.de>
8 *
9 * ULE Decapsulation code:
10 * Copyright (C) 2003, 2004 gcs - Global Communication & Services GmbH.
11 * and Department of Scientific Computing
12 * Paris Lodron University of Salzburg.
13 * Hilmar Linder <hlinder@cosy.sbg.ac.at>
14 * and Wolfram Stering <wstering@cosy.sbg.ac.at>
15 *
16 * ULE Decaps according to RFC 4326.
17 */
18
19 /*
20 * ULE ChangeLog:
21 * Feb 2004: hl/ws v1: Implementing draft-fair-ipdvb-ule-01.txt
22 *
23 * Dec 2004: hl/ws v2: Implementing draft-ietf-ipdvb-ule-03.txt:
24 * ULE Extension header handling.
25 * Bugreports by Moritz Vieth and Hanno Tersteegen,
26 * Fraunhofer Institute for Open Communication Systems
27 * Competence Center for Advanced Satellite Communications.
28 * Bugfixes and robustness improvements.
29 * Filtering on dest MAC addresses, if present (D-Bit = 0)
30 * DVB_ULE_DEBUG compile-time option.
31 * Apr 2006: cp v3: Bugfixes and compliency with RFC 4326 (ULE) by
32 * Christian Praehauser <cpraehaus@cosy.sbg.ac.at>,
33 * Paris Lodron University of Salzburg.
34 */
35
36 /*
37 * FIXME / TODO (dvb_net.c):
38 *
39 * Unloading does not work for 2.6.9 kernels: a refcount doesn't go to zero.
40 *
41 */
42
43 #define pr_fmt(fmt) "dvb_net: " fmt
44
45 #include <linux/module.h>
46 #include <linux/kernel.h>
47 #include <linux/netdevice.h>
48 #include <linux/etherdevice.h>
49 #include <linux/dvb/net.h>
50 #include <linux/uio.h>
51 #include <linux/uaccess.h>
52 #include <linux/crc32.h>
53 #include <linux/mutex.h>
54 #include <linux/sched.h>
55
56 #include <media/dvb_demux.h>
57 #include <media/dvb_net.h>
58
59 static inline __u32 iov_crc32( __u32 c, struct kvec *iov, unsigned int cnt )
60 {
61 unsigned int j;
62 for (j = 0; j < cnt; j++)
63 c = crc32_be( c, iov[j].iov_base, iov[j].iov_len );
64 return c;
65 }
66
67
68 #define DVB_NET_MULTICAST_MAX 10
69
70 #ifdef DVB_ULE_DEBUG
71 /*
72 * The code inside DVB_ULE_DEBUG keeps a history of the
73 * last 100 TS cells processed.
74 */
75 static unsigned char ule_hist[100*TS_SZ] = { 0 };
76 static unsigned char *ule_where = ule_hist, ule_dump;
77
78 static void hexdump(const unsigned char *buf, unsigned short len)
79 {
80 print_hex_dump_debug("", DUMP_PREFIX_OFFSET, 16, 1, buf, len, true);
81 }
82 #endif
83
84 struct dvb_net_priv {
85 int in_use;
86 u16 pid;
87 struct net_device *net;
88 struct dvb_net *host;
89 struct dmx_demux *demux;
90 struct dmx_section_feed *secfeed;
91 struct dmx_section_filter *secfilter;
92 struct dmx_ts_feed *tsfeed;
93 int multi_num;
94 struct dmx_section_filter *multi_secfilter[DVB_NET_MULTICAST_MAX];
95 unsigned char multi_macs[DVB_NET_MULTICAST_MAX][6];
96 int rx_mode;
97 #define RX_MODE_UNI 0
98 #define RX_MODE_MULTI 1
99 #define RX_MODE_ALL_MULTI 2
100 #define RX_MODE_PROMISC 3
101 struct work_struct set_multicast_list_wq;
102 struct work_struct restart_net_feed_wq;
103 unsigned char feedtype; /* Either FEED_TYPE_ or FEED_TYPE_ULE */
104 int need_pusi; /* Set to 1, if synchronization on PUSI required. */
105 unsigned char tscc; /* TS continuity counter after sync on PUSI. */
106 struct sk_buff *ule_skb; /* ULE SNDU decodes into this buffer. */
107 unsigned char *ule_next_hdr; /* Pointer into skb to next ULE extension header. */
108 unsigned short ule_sndu_len; /* ULE SNDU length in bytes, w/o D-Bit. */
109 unsigned short ule_sndu_type; /* ULE SNDU type field, complete. */
110 unsigned char ule_sndu_type_1; /* ULE SNDU type field, if split across 2 TS cells. */
111 unsigned char ule_dbit; /* Whether the DestMAC address present
112 * or not (bit is set). */
113 unsigned char ule_bridged; /* Whether the ULE_BRIDGED extension header was found. */
114 int ule_sndu_remain; /* Nr. of bytes still required for current ULE SNDU. */
115 unsigned long ts_count; /* Current ts cell counter. */
116 struct mutex mutex;
117 };
118
119
120 /*
121 * Determine the packet's protocol ID. The rule here is that we
122 * assume 802.3 if the type field is short enough to be a length.
123 * This is normal practice and works for any 'now in use' protocol.
124 *
125 * stolen from eth.c out of the linux kernel, hacked for dvb-device
126 * by Michael Holzt <kju@debian.org>
127 */
128 static __be16 dvb_net_eth_type_trans(struct sk_buff *skb,
129 struct net_device *dev)
130 {
131 struct ethhdr *eth;
132 unsigned char *rawp;
133
134 skb_reset_mac_header(skb);
135 skb_pull(skb,dev->hard_header_len);
136 eth = eth_hdr(skb);
137
138 if (*eth->h_dest & 1) {
139 if(ether_addr_equal(eth->h_dest,dev->broadcast))
140 skb->pkt_type=PACKET_BROADCAST;
141 else
142 skb->pkt_type=PACKET_MULTICAST;
143 }
144
145 if (ntohs(eth->h_proto) >= ETH_P_802_3_MIN)
146 return eth->h_proto;
147
148 rawp = skb->data;
149
150 /*
151 * This is a magic hack to spot IPX packets. Older Novell breaks
152 * the protocol design and runs IPX over 802.3 without an 802.2 LLC
153 * layer. We look for FFFF which isn't a used 802.2 SSAP/DSAP. This
154 * won't work for fault tolerant netware but does for the rest.
155 */
156 if (*(unsigned short *)rawp == 0xFFFF)
157 return htons(ETH_P_802_3);
158
159 /*
160 * Real 802.2 LLC
161 */
162 return htons(ETH_P_802_2);
163 }
164
165 #define TS_SZ 188
166 #define TS_SYNC 0x47
167 #define TS_TEI 0x80
168 #define TS_SC 0xC0
169 #define TS_PUSI 0x40
170 #define TS_AF_A 0x20
171 #define TS_AF_D 0x10
172
173 /* ULE Extension Header handlers. */
174
175 #define ULE_TEST 0
176 #define ULE_BRIDGED 1
177
178 #define ULE_OPTEXTHDR_PADDING 0
179
180 static int ule_test_sndu( struct dvb_net_priv *p )
181 {
182 return -1;
183 }
184
185 static int ule_bridged_sndu( struct dvb_net_priv *p )
186 {
187 struct ethhdr *hdr = (struct ethhdr*) p->ule_next_hdr;
188 if(ntohs(hdr->h_proto) < ETH_P_802_3_MIN) {
189 int framelen = p->ule_sndu_len - ((p->ule_next_hdr+sizeof(struct ethhdr)) - p->ule_skb->data);
190 /* A frame Type < ETH_P_802_3_MIN for a bridged frame, introduces a LLC Length field. */
191 if(framelen != ntohs(hdr->h_proto)) {
192 return -1;
193 }
194 }
195 /* Note:
196 * From RFC4326:
197 * "A bridged SNDU is a Mandatory Extension Header of Type 1.
198 * It must be the final (or only) extension header specified in the header chain of a SNDU."
199 * The 'ule_bridged' flag will cause the extension header processing loop to terminate.
200 */
201 p->ule_bridged = 1;
202 return 0;
203 }
204
205 static int ule_exthdr_padding(struct dvb_net_priv *p)
206 {
207 return 0;
208 }
209
210 /*
211 * Handle ULE extension headers.
212 * Function is called after a successful CRC32 verification of an ULE SNDU to complete its decoding.
213 * Returns: >= 0: nr. of bytes consumed by next extension header
214 * -1: Mandatory extension header that is not recognized or TEST SNDU; discard.
215 */
216 static int handle_one_ule_extension( struct dvb_net_priv *p )
217 {
218 /* Table of mandatory extension header handlers. The header type is the index. */
219 static int (*ule_mandatory_ext_handlers[255])( struct dvb_net_priv *p ) =
220 { [0] = ule_test_sndu, [1] = ule_bridged_sndu, [2] = NULL, };
221
222 /* Table of optional extension header handlers. The header type is the index. */
223 static int (*ule_optional_ext_handlers[255])( struct dvb_net_priv *p ) =
224 { [0] = ule_exthdr_padding, [1] = NULL, };
225
226 int ext_len = 0;
227 unsigned char hlen = (p->ule_sndu_type & 0x0700) >> 8;
228 unsigned char htype = p->ule_sndu_type & 0x00FF;
229
230 /* Discriminate mandatory and optional extension headers. */
231 if (hlen == 0) {
232 /* Mandatory extension header */
233 if (ule_mandatory_ext_handlers[htype]) {
234 ext_len = ule_mandatory_ext_handlers[htype]( p );
235 if(ext_len >= 0) {
236 p->ule_next_hdr += ext_len;
237 if (!p->ule_bridged) {
238 p->ule_sndu_type = ntohs(*(__be16 *)p->ule_next_hdr);
239 p->ule_next_hdr += 2;
240 } else {
241 p->ule_sndu_type = ntohs(*(__be16 *)(p->ule_next_hdr + ((p->ule_dbit ? 2 : 3) * ETH_ALEN)));
242 /* This assures the extension handling loop will terminate. */
243 }
244 }
245 // else: extension handler failed or SNDU should be discarded
246 } else
247 ext_len = -1; /* SNDU has to be discarded. */
248 } else {
249 /* Optional extension header. Calculate the length. */
250 ext_len = hlen << 1;
251 /* Process the optional extension header according to its type. */
252 if (ule_optional_ext_handlers[htype])
253 (void)ule_optional_ext_handlers[htype]( p );
254 p->ule_next_hdr += ext_len;
255 p->ule_sndu_type = ntohs( *(__be16 *)(p->ule_next_hdr-2) );
256 /*
257 * note: the length of the next header type is included in the
258 * length of THIS optional extension header
259 */
260 }
261
262 return ext_len;
263 }
264
265 static int handle_ule_extensions( struct dvb_net_priv *p )
266 {
267 int total_ext_len = 0, l;
268
269 p->ule_next_hdr = p->ule_skb->data;
270 do {
271 l = handle_one_ule_extension( p );
272 if (l < 0)
273 return l; /* Stop extension header processing and discard SNDU. */
274 total_ext_len += l;
275 pr_debug("ule_next_hdr=%p, ule_sndu_type=%i, l=%i, total_ext_len=%i\n",
276 p->ule_next_hdr, (int)p->ule_sndu_type,
277 l, total_ext_len);
278
279 } while (p->ule_sndu_type < ETH_P_802_3_MIN);
280
281 return total_ext_len;
282 }
283
284
285 /* Prepare for a new ULE SNDU: reset the decoder state. */
286 static inline void reset_ule( struct dvb_net_priv *p )
287 {
288 p->ule_skb = NULL;
289 p->ule_next_hdr = NULL;
290 p->ule_sndu_len = 0;
291 p->ule_sndu_type = 0;
292 p->ule_sndu_type_1 = 0;
293 p->ule_sndu_remain = 0;
294 p->ule_dbit = 0xFF;
295 p->ule_bridged = 0;
296 }
297
298 /*
299 * Decode ULE SNDUs according to draft-ietf-ipdvb-ule-03.txt from a sequence of
300 * TS cells of a single PID.
301 */
302
303 struct dvb_net_ule_handle {
304 struct net_device *dev;
305 struct dvb_net_priv *priv;
306 struct ethhdr *ethh;
307 const u8 *buf;
308 size_t buf_len;
309 unsigned long skipped;
310 const u8 *ts, *ts_end, *from_where;
311 u8 ts_remain, how_much, new_ts;
312 bool error;
313 };
314
315 static int dvb_net_ule_new_ts_cell(struct dvb_net_ule_handle *h)
316 {
317 /* We are about to process a new TS cell. */
318
319 #ifdef DVB_ULE_DEBUG
320 if (ule_where >= &ule_hist[100*TS_SZ])
321 ule_where = ule_hist;
322 memcpy(ule_where, h->ts, TS_SZ);
323 if (ule_dump) {
324 hexdump(ule_where, TS_SZ);
325 ule_dump = 0;
326 }
327 ule_where += TS_SZ;
328 #endif
329
330 /*
331 * Check TS h->error conditions: sync_byte, transport_error_indicator,
332 * scrambling_control .
333 */
334 if ((h->ts[0] != TS_SYNC) || (h->ts[1] & TS_TEI) ||
335 ((h->ts[3] & TS_SC) != 0)) {
336 pr_warn("%lu: Invalid TS cell: SYNC %#x, TEI %u, SC %#x.\n",
337 h->priv->ts_count, h->ts[0],
338 (h->ts[1] & TS_TEI) >> 7,
339 (h->ts[3] & TS_SC) >> 6);
340
341 /* Drop partly decoded SNDU, reset state, resync on PUSI. */
342 if (h->priv->ule_skb) {
343 dev_kfree_skb(h->priv->ule_skb);
344 /* Prepare for next SNDU. */
345 h->dev->stats.rx_errors++;
346 h->dev->stats.rx_frame_errors++;
347 }
348 reset_ule(h->priv);
349 h->priv->need_pusi = 1;
350
351 /* Continue with next TS cell. */
352 h->ts += TS_SZ;
353 h->priv->ts_count++;
354 return 1;
355 }
356
357 h->ts_remain = 184;
358 h->from_where = h->ts + 4;
359
360 return 0;
361 }
362
363 static int dvb_net_ule_ts_pusi(struct dvb_net_ule_handle *h)
364 {
365 if (h->ts[1] & TS_PUSI) {
366 /* Find beginning of first ULE SNDU in current TS cell. */
367 /* Synchronize continuity counter. */
368 h->priv->tscc = h->ts[3] & 0x0F;
369 /* There is a pointer field here. */
370 if (h->ts[4] > h->ts_remain) {
371 pr_err("%lu: Invalid ULE packet (pointer field %d)\n",
372 h->priv->ts_count, h->ts[4]);
373 h->ts += TS_SZ;
374 h->priv->ts_count++;
375 return 1;
376 }
377 /* Skip to destination of pointer field. */
378 h->from_where = &h->ts[5] + h->ts[4];
379 h->ts_remain -= 1 + h->ts[4];
380 h->skipped = 0;
381 } else {
382 h->skipped++;
383 h->ts += TS_SZ;
384 h->priv->ts_count++;
385 return 1;
386 }
387
388 return 0;
389 }
390
391 static int dvb_net_ule_new_ts(struct dvb_net_ule_handle *h)
392 {
393 /* Check continuity counter. */
394 if ((h->ts[3] & 0x0F) == h->priv->tscc)
395 h->priv->tscc = (h->priv->tscc + 1) & 0x0F;
396 else {
397 /* TS discontinuity handling: */
398 pr_warn("%lu: TS discontinuity: got %#x, expected %#x.\n",
399 h->priv->ts_count, h->ts[3] & 0x0F,
400 h->priv->tscc);
401 /* Drop partly decoded SNDU, reset state, resync on PUSI. */
402 if (h->priv->ule_skb) {
403 dev_kfree_skb(h->priv->ule_skb);
404 /* Prepare for next SNDU. */
405 // reset_ule(h->priv); moved to below.
406 h->dev->stats.rx_errors++;
407 h->dev->stats.rx_frame_errors++;
408 }
409 reset_ule(h->priv);
410 /* skip to next PUSI. */
411 h->priv->need_pusi = 1;
412 return 1;
413 }
414 /*
415 * If we still have an incomplete payload, but PUSI is
416 * set; some TS cells are missing.
417 * This is only possible here, if we missed exactly 16 TS
418 * cells (continuity counter wrap).
419 */
420 if (h->ts[1] & TS_PUSI) {
421 if (!h->priv->need_pusi) {
422 if (!(*h->from_where < (h->ts_remain-1)) ||
423 *h->from_where != h->priv->ule_sndu_remain) {
424 /*
425 * Pointer field is invalid.
426 * Drop this TS cell and any started ULE SNDU.
427 */
428 pr_warn("%lu: Invalid pointer field: %u.\n",
429 h->priv->ts_count,
430 *h->from_where);
431
432 /*
433 * Drop partly decoded SNDU, reset state,
434 * resync on PUSI.
435 */
436 if (h->priv->ule_skb) {
437 h->error = true;
438 dev_kfree_skb(h->priv->ule_skb);
439 }
440
441 if (h->error || h->priv->ule_sndu_remain) {
442 h->dev->stats.rx_errors++;
443 h->dev->stats.rx_frame_errors++;
444 h->error = false;
445 }
446
447 reset_ule(h->priv);
448 h->priv->need_pusi = 1;
449 return 1;
450 }
451 /*
452 * Skip pointer field (we're processing a
453 * packed payload).
454 */
455 h->from_where += 1;
456 h->ts_remain -= 1;
457 } else
458 h->priv->need_pusi = 0;
459
460 if (h->priv->ule_sndu_remain > 183) {
461 /*
462 * Current SNDU lacks more data than there
463 * could be available in the current TS cell.
464 */
465 h->dev->stats.rx_errors++;
466 h->dev->stats.rx_length_errors++;
467 pr_warn("%lu: Expected %d more SNDU bytes, but got PUSI (pf %d, h->ts_remain %d). Flushing incomplete payload.\n",
468 h->priv->ts_count,
469 h->priv->ule_sndu_remain,
470 h->ts[4], h->ts_remain);
471 dev_kfree_skb(h->priv->ule_skb);
472 /* Prepare for next SNDU. */
473 reset_ule(h->priv);
474 /*
475 * Resync: go to where pointer field points to:
476 * start of next ULE SNDU.
477 */
478 h->from_where += h->ts[4];
479 h->ts_remain -= h->ts[4];
480 }
481 }
482 return 0;
483 }
484
485
486 /*
487 * Start a new payload with skb.
488 * Find ULE header. It is only guaranteed that the
489 * length field (2 bytes) is contained in the current
490 * TS.
491 * Check h.ts_remain has to be >= 2 here.
492 */
493 static int dvb_net_ule_new_payload(struct dvb_net_ule_handle *h)
494 {
495 if (h->ts_remain < 2) {
496 pr_warn("Invalid payload packing: only %d bytes left in TS. Resyncing.\n",
497 h->ts_remain);
498 h->priv->ule_sndu_len = 0;
499 h->priv->need_pusi = 1;
500 h->ts += TS_SZ;
501 return 1;
502 }
503
504 if (!h->priv->ule_sndu_len) {
505 /* Got at least two bytes, thus extrace the SNDU length. */
506 h->priv->ule_sndu_len = h->from_where[0] << 8 |
507 h->from_where[1];
508 if (h->priv->ule_sndu_len & 0x8000) {
509 /* D-Bit is set: no dest mac present. */
510 h->priv->ule_sndu_len &= 0x7FFF;
511 h->priv->ule_dbit = 1;
512 } else
513 h->priv->ule_dbit = 0;
514
515 if (h->priv->ule_sndu_len < 5) {
516 pr_warn("%lu: Invalid ULE SNDU length %u. Resyncing.\n",
517 h->priv->ts_count,
518 h->priv->ule_sndu_len);
519 h->dev->stats.rx_errors++;
520 h->dev->stats.rx_length_errors++;
521 h->priv->ule_sndu_len = 0;
522 h->priv->need_pusi = 1;
523 h->new_ts = 1;
524 h->ts += TS_SZ;
525 h->priv->ts_count++;
526 return 1;
527 }
528 h->ts_remain -= 2; /* consume the 2 bytes SNDU length. */
529 h->from_where += 2;
530 }
531
532 h->priv->ule_sndu_remain = h->priv->ule_sndu_len + 2;
533 /*
534 * State of current TS:
535 * h->ts_remain (remaining bytes in the current TS cell)
536 * 0 ule_type is not available now, we need the next TS cell
537 * 1 the first byte of the ule_type is present
538 * >=2 full ULE header present, maybe some payload data as well.
539 */
540 switch (h->ts_remain) {
541 case 1:
542 h->priv->ule_sndu_remain--;
543 h->priv->ule_sndu_type = h->from_where[0] << 8;
544
545 /* first byte of ule_type is set. */
546 h->priv->ule_sndu_type_1 = 1;
547 h->ts_remain -= 1;
548 h->from_where += 1;
549 /* fallthrough */
550 case 0:
551 h->new_ts = 1;
552 h->ts += TS_SZ;
553 h->priv->ts_count++;
554 return 1;
555
556 default: /* complete ULE header is present in current TS. */
557 /* Extract ULE type field. */
558 if (h->priv->ule_sndu_type_1) {
559 h->priv->ule_sndu_type_1 = 0;
560 h->priv->ule_sndu_type |= h->from_where[0];
561 h->from_where += 1; /* points to payload start. */
562 h->ts_remain -= 1;
563 } else {
564 /* Complete type is present in new TS. */
565 h->priv->ule_sndu_type = h->from_where[0] << 8 |
566 h->from_where[1];
567 h->from_where += 2; /* points to payload start. */
568 h->ts_remain -= 2;
569 }
570 break;
571 }
572
573 /*
574 * Allocate the skb (decoder target buffer) with the correct size,
575 * as follows:
576 *
577 * prepare for the largest case: bridged SNDU with MAC address
578 * (dbit = 0).
579 */
580 h->priv->ule_skb = dev_alloc_skb(h->priv->ule_sndu_len +
581 ETH_HLEN + ETH_ALEN);
582 if (!h->priv->ule_skb) {
583 pr_notice("%s: Memory squeeze, dropping packet.\n",
584 h->dev->name);
585 h->dev->stats.rx_dropped++;
586 return -1;
587 }
588
589 /* This includes the CRC32 _and_ dest mac, if !dbit. */
590 h->priv->ule_sndu_remain = h->priv->ule_sndu_len;
591 h->priv->ule_skb->dev = h->dev;
592 /*
593 * Leave space for Ethernet or bridged SNDU header
594 * (eth hdr plus one MAC addr).
595 */
596 skb_reserve(h->priv->ule_skb, ETH_HLEN + ETH_ALEN);
597
598 return 0;
599 }
600
601
602 static int dvb_net_ule_should_drop(struct dvb_net_ule_handle *h)
603 {
604 static const u8 bc_addr[ETH_ALEN] = { [0 ... ETH_ALEN - 1] = 0xff };
605
606 /*
607 * The destination MAC address is the next data in the skb. It comes
608 * before any extension headers.
609 *
610 * Check if the payload of this SNDU should be passed up the stack.
611 */
612 if (h->priv->rx_mode == RX_MODE_PROMISC)
613 return 0;
614
615 if (h->priv->ule_skb->data[0] & 0x01) {
616 /* multicast or broadcast */
617 if (!ether_addr_equal(h->priv->ule_skb->data, bc_addr)) {
618 /* multicast */
619 if (h->priv->rx_mode == RX_MODE_MULTI) {
620 int i;
621
622 for (i = 0; i < h->priv->multi_num &&
623 !ether_addr_equal(h->priv->ule_skb->data,
624 h->priv->multi_macs[i]);
625 i++)
626 ;
627 if (i == h->priv->multi_num)
628 return 1;
629 } else if (h->priv->rx_mode != RX_MODE_ALL_MULTI)
630 return 1; /* no broadcast; */
631 /*
632 * else:
633 * all multicast mode: accept all multicast packets
634 */
635 }
636 /* else: broadcast */
637 } else if (!ether_addr_equal(h->priv->ule_skb->data, h->dev->dev_addr))
638 return 1;
639
640 return 0;
641 }
642
643
644 static void dvb_net_ule_check_crc(struct dvb_net_ule_handle *h,
645 struct kvec iov[3],
646 u32 ule_crc, u32 expected_crc)
647 {
648 u8 dest_addr[ETH_ALEN];
649
650 if (ule_crc != expected_crc) {
651 pr_warn("%lu: CRC32 check FAILED: %08x / %08x, SNDU len %d type %#x, ts_remain %d, next 2: %x.\n",
652 h->priv->ts_count, ule_crc, expected_crc,
653 h->priv->ule_sndu_len, h->priv->ule_sndu_type,
654 h->ts_remain,
655 h->ts_remain > 2 ?
656 *(unsigned short *)h->from_where : 0);
657
658 #ifdef DVB_ULE_DEBUG
659 hexdump(iov[0].iov_base, iov[0].iov_len);
660 hexdump(iov[1].iov_base, iov[1].iov_len);
661 hexdump(iov[2].iov_base, iov[2].iov_len);
662
663 if (ule_where == ule_hist) {
664 hexdump(&ule_hist[98*TS_SZ], TS_SZ);
665 hexdump(&ule_hist[99*TS_SZ], TS_SZ);
666 } else if (ule_where == &ule_hist[TS_SZ]) {
667 hexdump(&ule_hist[99*TS_SZ], TS_SZ);
668 hexdump(ule_hist, TS_SZ);
669 } else {
670 hexdump(ule_where - TS_SZ - TS_SZ, TS_SZ);
671 hexdump(ule_where - TS_SZ, TS_SZ);
672 }
673 ule_dump = 1;
674 #endif
675
676 h->dev->stats.rx_errors++;
677 h->dev->stats.rx_crc_errors++;
678 dev_kfree_skb(h->priv->ule_skb);
679
680 return;
681 }
682
683 /* CRC32 verified OK. */
684
685 /* CRC32 was OK, so remove it from skb. */
686 h->priv->ule_skb->tail -= 4;
687 h->priv->ule_skb->len -= 4;
688
689 if (!h->priv->ule_dbit) {
690 if (dvb_net_ule_should_drop(h)) {
691 netdev_dbg(h->dev,
692 "Dropping SNDU: MAC destination address does not match: dest addr: %pM, h->dev addr: %pM\n",
693 h->priv->ule_skb->data, h->dev->dev_addr);
694 dev_kfree_skb(h->priv->ule_skb);
695 return;
696 }
697
698 skb_copy_from_linear_data(h->priv->ule_skb, dest_addr,
699 ETH_ALEN);
700 skb_pull(h->priv->ule_skb, ETH_ALEN);
701 } else {
702 /* dest_addr buffer is only valid if h->priv->ule_dbit == 0 */
703 eth_zero_addr(dest_addr);
704 }
705
706 /* Handle ULE Extension Headers. */
707 if (h->priv->ule_sndu_type < ETH_P_802_3_MIN) {
708 /* There is an extension header. Handle it accordingly. */
709 int l = handle_ule_extensions(h->priv);
710
711 if (l < 0) {
712 /*
713 * Mandatory extension header unknown or TEST SNDU.
714 * Drop it.
715 */
716
717 // pr_warn("Dropping SNDU, extension headers.\n" );
718 dev_kfree_skb(h->priv->ule_skb);
719 return;
720 }
721 skb_pull(h->priv->ule_skb, l);
722 }
723
724 /*
725 * Construct/assure correct ethernet header.
726 * Note: in bridged mode (h->priv->ule_bridged != 0)
727 * we already have the (original) ethernet
728 * header at the start of the payload (after
729 * optional dest. address and any extension
730 * headers).
731 */
732 if (!h->priv->ule_bridged) {
733 skb_push(h->priv->ule_skb, ETH_HLEN);
734 h->ethh = (struct ethhdr *)h->priv->ule_skb->data;
735 memcpy(h->ethh->h_dest, dest_addr, ETH_ALEN);
736 eth_zero_addr(h->ethh->h_source);
737 h->ethh->h_proto = htons(h->priv->ule_sndu_type);
738 }
739 /* else: skb is in correct state; nothing to do. */
740 h->priv->ule_bridged = 0;
741
742 /* Stuff into kernel's protocol stack. */
743 h->priv->ule_skb->protocol = dvb_net_eth_type_trans(h->priv->ule_skb,
744 h->dev);
745 /*
746 * If D-bit is set (i.e. destination MAC address not present),
747 * receive the packet anyhow.
748 */
749 #if 0
750 if (h->priv->ule_dbit && skb->pkt_type == PACKET_OTHERHOST)
751 h->priv->ule_skb->pkt_type = PACKET_HOST;
752 #endif
753 h->dev->stats.rx_packets++;
754 h->dev->stats.rx_bytes += h->priv->ule_skb->len;
755 netif_rx(h->priv->ule_skb);
756 }
757
758 static void dvb_net_ule(struct net_device *dev, const u8 *buf, size_t buf_len)
759 {
760 int ret;
761 struct dvb_net_ule_handle h = {
762 .dev = dev,
763 .priv = netdev_priv(dev),
764 .ethh = NULL,
765 .buf = buf,
766 .buf_len = buf_len,
767 .skipped = 0L,
768 .ts = NULL,
769 .ts_end = NULL,
770 .from_where = NULL,
771 .ts_remain = 0,
772 .how_much = 0,
773 .new_ts = 1,
774 .error = false,
775 };
776
777 /*
778 * For all TS cells in current buffer.
779 * Appearently, we are called for every single TS cell.
780 */
781 for (h.ts = h.buf, h.ts_end = h.buf + h.buf_len;
782 h.ts < h.ts_end; /* no incr. */) {
783 if (h.new_ts) {
784 /* We are about to process a new TS cell. */
785 if (dvb_net_ule_new_ts_cell(&h))
786 continue;
787 }
788
789 /* Synchronize on PUSI, if required. */
790 if (h.priv->need_pusi) {
791 if (dvb_net_ule_ts_pusi(&h))
792 continue;
793 }
794
795 if (h.new_ts) {
796 if (dvb_net_ule_new_ts(&h))
797 continue;
798 }
799
800 /* Check if new payload needs to be started. */
801 if (h.priv->ule_skb == NULL) {
802 ret = dvb_net_ule_new_payload(&h);
803 if (ret < 0)
804 return;
805 if (ret)
806 continue;
807 }
808
809 /* Copy data into our current skb. */
810 h.how_much = min(h.priv->ule_sndu_remain, (int)h.ts_remain);
811 skb_put_data(h.priv->ule_skb, h.from_where, h.how_much);
812 h.priv->ule_sndu_remain -= h.how_much;
813 h.ts_remain -= h.how_much;
814 h.from_where += h.how_much;
815
816 /* Check for complete payload. */
817 if (h.priv->ule_sndu_remain <= 0) {
818 /* Check CRC32, we've got it in our skb already. */
819 __be16 ulen = htons(h.priv->ule_sndu_len);
820 __be16 utype = htons(h.priv->ule_sndu_type);
821 const u8 *tail;
822 struct kvec iov[3] = {
823 { &ulen, sizeof ulen },
824 { &utype, sizeof utype },
825 { h.priv->ule_skb->data,
826 h.priv->ule_skb->len - 4 }
827 };
828 u32 ule_crc = ~0L, expected_crc;
829 if (h.priv->ule_dbit) {
830 /* Set D-bit for CRC32 verification,
831 * if it was set originally. */
832 ulen |= htons(0x8000);
833 }
834
835 ule_crc = iov_crc32(ule_crc, iov, 3);
836 tail = skb_tail_pointer(h.priv->ule_skb);
837 expected_crc = *(tail - 4) << 24 |
838 *(tail - 3) << 16 |
839 *(tail - 2) << 8 |
840 *(tail - 1);
841
842 dvb_net_ule_check_crc(&h, iov, ule_crc, expected_crc);
843
844 /* Prepare for next SNDU. */
845 reset_ule(h.priv);
846 }
847
848 /* More data in current TS (look at the bytes following the CRC32)? */
849 if (h.ts_remain >= 2 && *((unsigned short *)h.from_where) != 0xFFFF) {
850 /* Next ULE SNDU starts right there. */
851 h.new_ts = 0;
852 h.priv->ule_skb = NULL;
853 h.priv->ule_sndu_type_1 = 0;
854 h.priv->ule_sndu_len = 0;
855 // pr_warn("More data in current TS: [%#x %#x %#x %#x]\n",
856 // *(h.from_where + 0), *(h.from_where + 1),
857 // *(h.from_where + 2), *(h.from_where + 3));
858 // pr_warn("h.ts @ %p, stopped @ %p:\n", h.ts, h.from_where + 0);
859 // hexdump(h.ts, 188);
860 } else {
861 h.new_ts = 1;
862 h.ts += TS_SZ;
863 h.priv->ts_count++;
864 if (h.priv->ule_skb == NULL) {
865 h.priv->need_pusi = 1;
866 h.priv->ule_sndu_type_1 = 0;
867 h.priv->ule_sndu_len = 0;
868 }
869 }
870 } /* for all available TS cells */
871 }
872
873 static int dvb_net_ts_callback(const u8 *buffer1, size_t buffer1_len,
874 const u8 *buffer2, size_t buffer2_len,
875 struct dmx_ts_feed *feed,
876 u32 *buffer_flags)
877 {
878 struct net_device *dev = feed->priv;
879
880 if (buffer2)
881 pr_warn("buffer2 not NULL: %p.\n", buffer2);
882 if (buffer1_len > 32768)
883 pr_warn("length > 32k: %zu.\n", buffer1_len);
884 /* pr_info("TS callback: %u bytes, %u TS cells @ %p.\n",
885 buffer1_len, buffer1_len / TS_SZ, buffer1); */
886 dvb_net_ule(dev, buffer1, buffer1_len);
887 return 0;
888 }
889
890
891 static void dvb_net_sec(struct net_device *dev,
892 const u8 *pkt, int pkt_len)
893 {
894 u8 *eth;
895 struct sk_buff *skb;
896 struct net_device_stats *stats = &dev->stats;
897 int snap = 0;
898
899 /* note: pkt_len includes a 32bit checksum */
900 if (pkt_len < 16) {
901 pr_warn("%s: IP/MPE packet length = %d too small.\n",
902 dev->name, pkt_len);
903 stats->rx_errors++;
904 stats->rx_length_errors++;
905 return;
906 }
907 /* it seems some ISPs manage to screw up here, so we have to
908 * relax the error checks... */
909 #if 0
910 if ((pkt[5] & 0xfd) != 0xc1) {
911 /* drop scrambled or broken packets */
912 #else
913 if ((pkt[5] & 0x3c) != 0x00) {
914 /* drop scrambled */
915 #endif
916 stats->rx_errors++;
917 stats->rx_crc_errors++;
918 return;
919 }
920 if (pkt[5] & 0x02) {
921 /* handle LLC/SNAP, see rfc-1042 */
922 if (pkt_len < 24 || memcmp(&pkt[12], "\xaa\xaa\x03\0\0\0", 6)) {
923 stats->rx_dropped++;
924 return;
925 }
926 snap = 8;
927 }
928 if (pkt[7]) {
929 /* FIXME: assemble datagram from multiple sections */
930 stats->rx_errors++;
931 stats->rx_frame_errors++;
932 return;
933 }
934
935 /* we have 14 byte ethernet header (ip header follows);
936 * 12 byte MPE header; 4 byte checksum; + 2 byte alignment, 8 byte LLC/SNAP
937 */
938 if (!(skb = dev_alloc_skb(pkt_len - 4 - 12 + 14 + 2 - snap))) {
939 //pr_notice("%s: Memory squeeze, dropping packet.\n", dev->name);
940 stats->rx_dropped++;
941 return;
942 }
943 skb_reserve(skb, 2); /* longword align L3 header */
944 skb->dev = dev;
945
946 /* copy L3 payload */
947 eth = skb_put(skb, pkt_len - 12 - 4 + 14 - snap);
948 memcpy(eth + 14, pkt + 12 + snap, pkt_len - 12 - 4 - snap);
949
950 /* create ethernet header: */
951 eth[0]=pkt[0x0b];
952 eth[1]=pkt[0x0a];
953 eth[2]=pkt[0x09];
954 eth[3]=pkt[0x08];
955 eth[4]=pkt[0x04];
956 eth[5]=pkt[0x03];
957
958 eth[6]=eth[7]=eth[8]=eth[9]=eth[10]=eth[11]=0;
959
960 if (snap) {
961 eth[12] = pkt[18];
962 eth[13] = pkt[19];
963 } else {
964 /* protocol numbers are from rfc-1700 or
965 * http://www.iana.org/assignments/ethernet-numbers
966 */
967 if (pkt[12] >> 4 == 6) { /* version field from IP header */
968 eth[12] = 0x86; /* IPv6 */
969 eth[13] = 0xdd;
970 } else {
971 eth[12] = 0x08; /* IPv4 */
972 eth[13] = 0x00;
973 }
974 }
975
976 skb->protocol = dvb_net_eth_type_trans(skb, dev);
977
978 stats->rx_packets++;
979 stats->rx_bytes+=skb->len;
980 netif_rx(skb);
981 }
982
983 static int dvb_net_sec_callback(const u8 *buffer1, size_t buffer1_len,
984 const u8 *buffer2, size_t buffer2_len,
985 struct dmx_section_filter *filter, u32 *buffer_flags)
986 {
987 struct net_device *dev = filter->priv;
988
989 /*
990 * we rely on the DVB API definition where exactly one complete
991 * section is delivered in buffer1
992 */
993 dvb_net_sec (dev, buffer1, buffer1_len);
994 return 0;
995 }
996
997 static netdev_tx_t dvb_net_tx(struct sk_buff *skb, struct net_device *dev)
998 {
999 dev_kfree_skb(skb);
1000 return NETDEV_TX_OK;
1001 }
1002
1003 static u8 mask_normal[6]={0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
1004 static u8 mask_allmulti[6]={0xff, 0xff, 0xff, 0x00, 0x00, 0x00};
1005 static u8 mac_allmulti[6]={0x01, 0x00, 0x5e, 0x00, 0x00, 0x00};
1006 static u8 mask_promisc[6]={0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
1007
1008 static int dvb_net_filter_sec_set(struct net_device *dev,
1009 struct dmx_section_filter **secfilter,
1010 u8 *mac, u8 *mac_mask)
1011 {
1012 struct dvb_net_priv *priv = netdev_priv(dev);
1013 int ret;
1014
1015 *secfilter=NULL;
1016 ret = priv->secfeed->allocate_filter(priv->secfeed, secfilter);
1017 if (ret<0) {
1018 pr_err("%s: could not get filter\n", dev->name);
1019 return ret;
1020 }
1021
1022 (*secfilter)->priv=(void *) dev;
1023
1024 memset((*secfilter)->filter_value, 0x00, DMX_MAX_FILTER_SIZE);
1025 memset((*secfilter)->filter_mask, 0x00, DMX_MAX_FILTER_SIZE);
1026 memset((*secfilter)->filter_mode, 0xff, DMX_MAX_FILTER_SIZE);
1027
1028 (*secfilter)->filter_value[0]=0x3e;
1029 (*secfilter)->filter_value[3]=mac[5];
1030 (*secfilter)->filter_value[4]=mac[4];
1031 (*secfilter)->filter_value[8]=mac[3];
1032 (*secfilter)->filter_value[9]=mac[2];
1033 (*secfilter)->filter_value[10]=mac[1];
1034 (*secfilter)->filter_value[11]=mac[0];
1035
1036 (*secfilter)->filter_mask[0] = 0xff;
1037 (*secfilter)->filter_mask[3] = mac_mask[5];
1038 (*secfilter)->filter_mask[4] = mac_mask[4];
1039 (*secfilter)->filter_mask[8] = mac_mask[3];
1040 (*secfilter)->filter_mask[9] = mac_mask[2];
1041 (*secfilter)->filter_mask[10] = mac_mask[1];
1042 (*secfilter)->filter_mask[11]=mac_mask[0];
1043
1044 netdev_dbg(dev, "filter mac=%pM mask=%pM\n", mac, mac_mask);
1045
1046 return 0;
1047 }
1048
1049 static int dvb_net_feed_start(struct net_device *dev)
1050 {
1051 int ret = 0, i;
1052 struct dvb_net_priv *priv = netdev_priv(dev);
1053 struct dmx_demux *demux = priv->demux;
1054 unsigned char *mac = (unsigned char *) dev->dev_addr;
1055
1056 netdev_dbg(dev, "rx_mode %i\n", priv->rx_mode);
1057 mutex_lock(&priv->mutex);
1058 if (priv->tsfeed || priv->secfeed || priv->secfilter || priv->multi_secfilter[0])
1059 pr_err("%s: BUG %d\n", __func__, __LINE__);
1060
1061 priv->secfeed=NULL;
1062 priv->secfilter=NULL;
1063 priv->tsfeed = NULL;
1064
1065 if (priv->feedtype == DVB_NET_FEEDTYPE_MPE) {
1066 netdev_dbg(dev, "alloc secfeed\n");
1067 ret=demux->allocate_section_feed(demux, &priv->secfeed,
1068 dvb_net_sec_callback);
1069 if (ret<0) {
1070 pr_err("%s: could not allocate section feed\n",
1071 dev->name);
1072 goto error;
1073 }
1074
1075 ret = priv->secfeed->set(priv->secfeed, priv->pid, 1);
1076
1077 if (ret<0) {
1078 pr_err("%s: could not set section feed\n", dev->name);
1079 priv->demux->release_section_feed(priv->demux, priv->secfeed);
1080 priv->secfeed=NULL;
1081 goto error;
1082 }
1083
1084 if (priv->rx_mode != RX_MODE_PROMISC) {
1085 netdev_dbg(dev, "set secfilter\n");
1086 dvb_net_filter_sec_set(dev, &priv->secfilter, mac, mask_normal);
1087 }
1088
1089 switch (priv->rx_mode) {
1090 case RX_MODE_MULTI:
1091 for (i = 0; i < priv->multi_num; i++) {
1092 netdev_dbg(dev, "set multi_secfilter[%d]\n", i);
1093 dvb_net_filter_sec_set(dev, &priv->multi_secfilter[i],
1094 priv->multi_macs[i], mask_normal);
1095 }
1096 break;
1097 case RX_MODE_ALL_MULTI:
1098 priv->multi_num=1;
1099 netdev_dbg(dev, "set multi_secfilter[0]\n");
1100 dvb_net_filter_sec_set(dev, &priv->multi_secfilter[0],
1101 mac_allmulti, mask_allmulti);
1102 break;
1103 case RX_MODE_PROMISC:
1104 priv->multi_num=0;
1105 netdev_dbg(dev, "set secfilter\n");
1106 dvb_net_filter_sec_set(dev, &priv->secfilter, mac, mask_promisc);
1107 break;
1108 }
1109
1110 netdev_dbg(dev, "start filtering\n");
1111 priv->secfeed->start_filtering(priv->secfeed);
1112 } else if (priv->feedtype == DVB_NET_FEEDTYPE_ULE) {
1113 ktime_t timeout = ns_to_ktime(10 * NSEC_PER_MSEC);
1114
1115 /* we have payloads encapsulated in TS */
1116 netdev_dbg(dev, "alloc tsfeed\n");
1117 ret = demux->allocate_ts_feed(demux, &priv->tsfeed, dvb_net_ts_callback);
1118 if (ret < 0) {
1119 pr_err("%s: could not allocate ts feed\n", dev->name);
1120 goto error;
1121 }
1122
1123 /* Set netdevice pointer for ts decaps callback. */
1124 priv->tsfeed->priv = (void *)dev;
1125 ret = priv->tsfeed->set(priv->tsfeed,
1126 priv->pid, /* pid */
1127 TS_PACKET, /* type */
1128 DMX_PES_OTHER, /* pes type */
1129 timeout /* timeout */
1130 );
1131
1132 if (ret < 0) {
1133 pr_err("%s: could not set ts feed\n", dev->name);
1134 priv->demux->release_ts_feed(priv->demux, priv->tsfeed);
1135 priv->tsfeed = NULL;
1136 goto error;
1137 }
1138
1139 netdev_dbg(dev, "start filtering\n");
1140 priv->tsfeed->start_filtering(priv->tsfeed);
1141 } else
1142 ret = -EINVAL;
1143
1144 error:
1145 mutex_unlock(&priv->mutex);
1146 return ret;
1147 }
1148
1149 static int dvb_net_feed_stop(struct net_device *dev)
1150 {
1151 struct dvb_net_priv *priv = netdev_priv(dev);
1152 int i, ret = 0;
1153
1154 mutex_lock(&priv->mutex);
1155 if (priv->feedtype == DVB_NET_FEEDTYPE_MPE) {
1156 if (priv->secfeed) {
1157 if (priv->secfeed->is_filtering) {
1158 netdev_dbg(dev, "stop secfeed\n");
1159 priv->secfeed->stop_filtering(priv->secfeed);
1160 }
1161
1162 if (priv->secfilter) {
1163 netdev_dbg(dev, "release secfilter\n");
1164 priv->secfeed->release_filter(priv->secfeed,
1165 priv->secfilter);
1166 priv->secfilter=NULL;
1167 }
1168
1169 for (i=0; i<priv->multi_num; i++) {
1170 if (priv->multi_secfilter[i]) {
1171 netdev_dbg(dev, "release multi_filter[%d]\n",
1172 i);
1173 priv->secfeed->release_filter(priv->secfeed,
1174 priv->multi_secfilter[i]);
1175 priv->multi_secfilter[i] = NULL;
1176 }
1177 }
1178
1179 priv->demux->release_section_feed(priv->demux, priv->secfeed);
1180 priv->secfeed = NULL;
1181 } else
1182 pr_err("%s: no feed to stop\n", dev->name);
1183 } else if (priv->feedtype == DVB_NET_FEEDTYPE_ULE) {
1184 if (priv->tsfeed) {
1185 if (priv->tsfeed->is_filtering) {
1186 netdev_dbg(dev, "stop tsfeed\n");
1187 priv->tsfeed->stop_filtering(priv->tsfeed);
1188 }
1189 priv->demux->release_ts_feed(priv->demux, priv->tsfeed);
1190 priv->tsfeed = NULL;
1191 }
1192 else
1193 pr_err("%s: no ts feed to stop\n", dev->name);
1194 } else
1195 ret = -EINVAL;
1196 mutex_unlock(&priv->mutex);
1197 return ret;
1198 }
1199
1200
1201 static int dvb_set_mc_filter(struct net_device *dev, unsigned char *addr)
1202 {
1203 struct dvb_net_priv *priv = netdev_priv(dev);
1204
1205 if (priv->multi_num == DVB_NET_MULTICAST_MAX)
1206 return -ENOMEM;
1207
1208 memcpy(priv->multi_macs[priv->multi_num], addr, ETH_ALEN);
1209
1210 priv->multi_num++;
1211 return 0;
1212 }
1213
1214
1215 static void wq_set_multicast_list (struct work_struct *work)
1216 {
1217 struct dvb_net_priv *priv =
1218 container_of(work, struct dvb_net_priv, set_multicast_list_wq);
1219 struct net_device *dev = priv->net;
1220
1221 dvb_net_feed_stop(dev);
1222 priv->rx_mode = RX_MODE_UNI;
1223 netif_addr_lock_bh(dev);
1224
1225 if (dev->flags & IFF_PROMISC) {
1226 netdev_dbg(dev, "promiscuous mode\n");
1227 priv->rx_mode = RX_MODE_PROMISC;
1228 } else if ((dev->flags & IFF_ALLMULTI)) {
1229 netdev_dbg(dev, "allmulti mode\n");
1230 priv->rx_mode = RX_MODE_ALL_MULTI;
1231 } else if (!netdev_mc_empty(dev)) {
1232 struct netdev_hw_addr *ha;
1233
1234 netdev_dbg(dev, "set_mc_list, %d entries\n",
1235 netdev_mc_count(dev));
1236
1237 priv->rx_mode = RX_MODE_MULTI;
1238 priv->multi_num = 0;
1239
1240 netdev_for_each_mc_addr(ha, dev)
1241 dvb_set_mc_filter(dev, ha->addr);
1242 }
1243
1244 netif_addr_unlock_bh(dev);
1245 dvb_net_feed_start(dev);
1246 }
1247
1248
1249 static void dvb_net_set_multicast_list (struct net_device *dev)
1250 {
1251 struct dvb_net_priv *priv = netdev_priv(dev);
1252 schedule_work(&priv->set_multicast_list_wq);
1253 }
1254
1255
1256 static void wq_restart_net_feed (struct work_struct *work)
1257 {
1258 struct dvb_net_priv *priv =
1259 container_of(work, struct dvb_net_priv, restart_net_feed_wq);
1260 struct net_device *dev = priv->net;
1261
1262 if (netif_running(dev)) {
1263 dvb_net_feed_stop(dev);
1264 dvb_net_feed_start(dev);
1265 }
1266 }
1267
1268
1269 static int dvb_net_set_mac (struct net_device *dev, void *p)
1270 {
1271 struct dvb_net_priv *priv = netdev_priv(dev);
1272 struct sockaddr *addr=p;
1273
1274 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1275
1276 if (netif_running(dev))
1277 schedule_work(&priv->restart_net_feed_wq);
1278
1279 return 0;
1280 }
1281
1282
1283 static int dvb_net_open(struct net_device *dev)
1284 {
1285 struct dvb_net_priv *priv = netdev_priv(dev);
1286
1287 priv->in_use++;
1288 dvb_net_feed_start(dev);
1289 return 0;
1290 }
1291
1292
1293 static int dvb_net_stop(struct net_device *dev)
1294 {
1295 struct dvb_net_priv *priv = netdev_priv(dev);
1296
1297 priv->in_use--;
1298 return dvb_net_feed_stop(dev);
1299 }
1300
1301 static const struct header_ops dvb_header_ops = {
1302 .create = eth_header,
1303 .parse = eth_header_parse,
1304 };
1305
1306
1307 static const struct net_device_ops dvb_netdev_ops = {
1308 .ndo_open = dvb_net_open,
1309 .ndo_stop = dvb_net_stop,
1310 .ndo_start_xmit = dvb_net_tx,
1311 .ndo_set_rx_mode = dvb_net_set_multicast_list,
1312 .ndo_set_mac_address = dvb_net_set_mac,
1313 .ndo_validate_addr = eth_validate_addr,
1314 };
1315
1316 static void dvb_net_setup(struct net_device *dev)
1317 {
1318 ether_setup(dev);
1319
1320 dev->header_ops = &dvb_header_ops;
1321 dev->netdev_ops = &dvb_netdev_ops;
1322 dev->mtu = 4096;
1323 dev->max_mtu = 4096;
1324
1325 dev->flags |= IFF_NOARP;
1326 }
1327
1328 static int get_if(struct dvb_net *dvbnet)
1329 {
1330 int i;
1331
1332 for (i=0; i<DVB_NET_DEVICES_MAX; i++)
1333 if (!dvbnet->state[i])
1334 break;
1335
1336 if (i == DVB_NET_DEVICES_MAX)
1337 return -1;
1338
1339 dvbnet->state[i]=1;
1340 return i;
1341 }
1342
1343 static int dvb_net_add_if(struct dvb_net *dvbnet, u16 pid, u8 feedtype)
1344 {
1345 struct net_device *net;
1346 struct dvb_net_priv *priv;
1347 int result;
1348 int if_num;
1349
1350 if (feedtype != DVB_NET_FEEDTYPE_MPE && feedtype != DVB_NET_FEEDTYPE_ULE)
1351 return -EINVAL;
1352 if ((if_num = get_if(dvbnet)) < 0)
1353 return -EINVAL;
1354
1355 net = alloc_netdev(sizeof(struct dvb_net_priv), "dvb",
1356 NET_NAME_UNKNOWN, dvb_net_setup);
1357 if (!net)
1358 return -ENOMEM;
1359
1360 if (dvbnet->dvbdev->id)
1361 snprintf(net->name, IFNAMSIZ, "dvb%d%u%d",
1362 dvbnet->dvbdev->adapter->num, dvbnet->dvbdev->id, if_num);
1363 else
1364 /* compatibility fix to keep dvb0_0 format */
1365 snprintf(net->name, IFNAMSIZ, "dvb%d_%d",
1366 dvbnet->dvbdev->adapter->num, if_num);
1367
1368 net->addr_len = 6;
1369 memcpy(net->dev_addr, dvbnet->dvbdev->adapter->proposed_mac, 6);
1370
1371 dvbnet->device[if_num] = net;
1372
1373 priv = netdev_priv(net);
1374 priv->net = net;
1375 priv->demux = dvbnet->demux;
1376 priv->pid = pid;
1377 priv->rx_mode = RX_MODE_UNI;
1378 priv->need_pusi = 1;
1379 priv->tscc = 0;
1380 priv->feedtype = feedtype;
1381 reset_ule(priv);
1382
1383 INIT_WORK(&priv->set_multicast_list_wq, wq_set_multicast_list);
1384 INIT_WORK(&priv->restart_net_feed_wq, wq_restart_net_feed);
1385 mutex_init(&priv->mutex);
1386
1387 net->base_addr = pid;
1388
1389 if ((result = register_netdev(net)) < 0) {
1390 dvbnet->device[if_num] = NULL;
1391 free_netdev(net);
1392 return result;
1393 }
1394 pr_info("created network interface %s\n", net->name);
1395
1396 return if_num;
1397 }
1398
1399 static int dvb_net_remove_if(struct dvb_net *dvbnet, unsigned long num)
1400 {
1401 struct net_device *net = dvbnet->device[num];
1402 struct dvb_net_priv *priv;
1403
1404 if (!dvbnet->state[num])
1405 return -EINVAL;
1406 priv = netdev_priv(net);
1407 if (priv->in_use)
1408 return -EBUSY;
1409
1410 dvb_net_stop(net);
1411 flush_work(&priv->set_multicast_list_wq);
1412 flush_work(&priv->restart_net_feed_wq);
1413 pr_info("removed network interface %s\n", net->name);
1414 unregister_netdev(net);
1415 dvbnet->state[num]=0;
1416 dvbnet->device[num] = NULL;
1417 free_netdev(net);
1418
1419 return 0;
1420 }
1421
1422 static int dvb_net_do_ioctl(struct file *file,
1423 unsigned int cmd, void *parg)
1424 {
1425 struct dvb_device *dvbdev = file->private_data;
1426 struct dvb_net *dvbnet = dvbdev->priv;
1427 int ret = 0;
1428
1429 if (((file->f_flags&O_ACCMODE)==O_RDONLY))
1430 return -EPERM;
1431
1432 if (mutex_lock_interruptible(&dvbnet->ioctl_mutex))
1433 return -ERESTARTSYS;
1434
1435 switch (cmd) {
1436 case NET_ADD_IF:
1437 {
1438 struct dvb_net_if *dvbnetif = parg;
1439 int result;
1440
1441 if (!capable(CAP_SYS_ADMIN)) {
1442 ret = -EPERM;
1443 goto ioctl_error;
1444 }
1445
1446 if (!try_module_get(dvbdev->adapter->module)) {
1447 ret = -EPERM;
1448 goto ioctl_error;
1449 }
1450
1451 result=dvb_net_add_if(dvbnet, dvbnetif->pid, dvbnetif->feedtype);
1452 if (result<0) {
1453 module_put(dvbdev->adapter->module);
1454 ret = result;
1455 goto ioctl_error;
1456 }
1457 dvbnetif->if_num=result;
1458 break;
1459 }
1460 case NET_GET_IF:
1461 {
1462 struct net_device *netdev;
1463 struct dvb_net_priv *priv_data;
1464 struct dvb_net_if *dvbnetif = parg;
1465
1466 if (dvbnetif->if_num >= DVB_NET_DEVICES_MAX ||
1467 !dvbnet->state[dvbnetif->if_num]) {
1468 ret = -EINVAL;
1469 goto ioctl_error;
1470 }
1471
1472 netdev = dvbnet->device[dvbnetif->if_num];
1473
1474 priv_data = netdev_priv(netdev);
1475 dvbnetif->pid=priv_data->pid;
1476 dvbnetif->feedtype=priv_data->feedtype;
1477 break;
1478 }
1479 case NET_REMOVE_IF:
1480 {
1481 if (!capable(CAP_SYS_ADMIN)) {
1482 ret = -EPERM;
1483 goto ioctl_error;
1484 }
1485 if ((unsigned long) parg >= DVB_NET_DEVICES_MAX) {
1486 ret = -EINVAL;
1487 goto ioctl_error;
1488 }
1489 ret = dvb_net_remove_if(dvbnet, (unsigned long) parg);
1490 if (!ret)
1491 module_put(dvbdev->adapter->module);
1492 break;
1493 }
1494
1495 /* binary compatibility cruft */
1496 case __NET_ADD_IF_OLD:
1497 {
1498 struct __dvb_net_if_old *dvbnetif = parg;
1499 int result;
1500
1501 if (!capable(CAP_SYS_ADMIN)) {
1502 ret = -EPERM;
1503 goto ioctl_error;
1504 }
1505
1506 if (!try_module_get(dvbdev->adapter->module)) {
1507 ret = -EPERM;
1508 goto ioctl_error;
1509 }
1510
1511 result=dvb_net_add_if(dvbnet, dvbnetif->pid, DVB_NET_FEEDTYPE_MPE);
1512 if (result<0) {
1513 module_put(dvbdev->adapter->module);
1514 ret = result;
1515 goto ioctl_error;
1516 }
1517 dvbnetif->if_num=result;
1518 break;
1519 }
1520 case __NET_GET_IF_OLD:
1521 {
1522 struct net_device *netdev;
1523 struct dvb_net_priv *priv_data;
1524 struct __dvb_net_if_old *dvbnetif = parg;
1525
1526 if (dvbnetif->if_num >= DVB_NET_DEVICES_MAX ||
1527 !dvbnet->state[dvbnetif->if_num]) {
1528 ret = -EINVAL;
1529 goto ioctl_error;
1530 }
1531
1532 netdev = dvbnet->device[dvbnetif->if_num];
1533
1534 priv_data = netdev_priv(netdev);
1535 dvbnetif->pid=priv_data->pid;
1536 break;
1537 }
1538 default:
1539 ret = -ENOTTY;
1540 break;
1541 }
1542
1543 ioctl_error:
1544 mutex_unlock(&dvbnet->ioctl_mutex);
1545 return ret;
1546 }
1547
1548 static long dvb_net_ioctl(struct file *file,
1549 unsigned int cmd, unsigned long arg)
1550 {
1551 return dvb_usercopy(file, cmd, arg, dvb_net_do_ioctl);
1552 }
1553
1554 static int dvb_net_close(struct inode *inode, struct file *file)
1555 {
1556 struct dvb_device *dvbdev = file->private_data;
1557 struct dvb_net *dvbnet = dvbdev->priv;
1558
1559 dvb_generic_release(inode, file);
1560
1561 if(dvbdev->users == 1 && dvbnet->exit == 1)
1562 wake_up(&dvbdev->wait_queue);
1563 return 0;
1564 }
1565
1566
1567 static const struct file_operations dvb_net_fops = {
1568 .owner = THIS_MODULE,
1569 .unlocked_ioctl = dvb_net_ioctl,
1570 .open = dvb_generic_open,
1571 .release = dvb_net_close,
1572 .llseek = noop_llseek,
1573 };
1574
1575 static const struct dvb_device dvbdev_net = {
1576 .priv = NULL,
1577 .users = 1,
1578 .writers = 1,
1579 #if defined(CONFIG_MEDIA_CONTROLLER_DVB)
1580 .name = "dvb-net",
1581 #endif
1582 .fops = &dvb_net_fops,
1583 };
1584
1585 void dvb_net_release (struct dvb_net *dvbnet)
1586 {
1587 int i;
1588
1589 dvbnet->exit = 1;
1590 if (dvbnet->dvbdev->users < 1)
1591 wait_event(dvbnet->dvbdev->wait_queue,
1592 dvbnet->dvbdev->users==1);
1593
1594 dvb_unregister_device(dvbnet->dvbdev);
1595
1596 for (i=0; i<DVB_NET_DEVICES_MAX; i++) {
1597 if (!dvbnet->state[i])
1598 continue;
1599 dvb_net_remove_if(dvbnet, i);
1600 }
1601 }
1602 EXPORT_SYMBOL(dvb_net_release);
1603
1604
1605 int dvb_net_init (struct dvb_adapter *adap, struct dvb_net *dvbnet,
1606 struct dmx_demux *dmx)
1607 {
1608 int i;
1609
1610 mutex_init(&dvbnet->ioctl_mutex);
1611 dvbnet->demux = dmx;
1612
1613 for (i=0; i<DVB_NET_DEVICES_MAX; i++)
1614 dvbnet->state[i] = 0;
1615
1616 return dvb_register_device(adap, &dvbnet->dvbdev, &dvbdev_net,
1617 dvbnet, DVB_DEVICE_NET, 0);
1618 }
1619 EXPORT_SYMBOL(dvb_net_init);
Linux with added FPC-III support