]> git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blob - drivers/media/dvb-core/dvb_net.c
projects / mirror_ubuntu-artful-kernel.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
[media] dvb_demux: uncomment a packet loss check code
[mirror_ubuntu-artful-kernel.git] / drivers / media / dvb-core / dvb_net.c
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 * ULE Decapsulation code:
9 * Copyright (C) 2003, 2004 gcs - Global Communication & Services GmbH.
10 * and Department of Scientific Computing
11 * Paris Lodron University of Salzburg.
12 * Hilmar Linder <hlinder@cosy.sbg.ac.at>
13 * and Wolfram Stering <wstering@cosy.sbg.ac.at>
14 *
15 * ULE Decaps according to RFC 4326.
16 *
17 * This program is free software; you can redistribute it and/or
18 * modify it under the terms of the GNU General Public License
19 * as published by the Free Software Foundation; either version 2
20 * of the License, or (at your option) any later version.
21 *
22 * This program is distributed in the hope that it will be useful,
23 * but WITHOUT ANY WARRANTY; without even the implied warranty of
24 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
25 * GNU General Public License for more details.
26 *
27 * You should have received a copy of the GNU General Public License
28 * along with this program; if not, write to the Free Software
29 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
30 * Or, point your browser to http://www.gnu.org/copyleft/gpl.html
31 */
32
33 /*
34 * ULE ChangeLog:
35 * Feb 2004: hl/ws v1: Implementing draft-fair-ipdvb-ule-01.txt
36 *
37 * Dec 2004: hl/ws v2: Implementing draft-ietf-ipdvb-ule-03.txt:
38 * ULE Extension header handling.
39 * Bugreports by Moritz Vieth and Hanno Tersteegen,
40 * Fraunhofer Institute for Open Communication Systems
41 * Competence Center for Advanced Satellite Communications.
42 * Bugfixes and robustness improvements.
43 * Filtering on dest MAC addresses, if present (D-Bit = 0)
44 * ULE_DEBUG compile-time option.
45 * Apr 2006: cp v3: Bugfixes and compliency with RFC 4326 (ULE) by
46 * Christian Praehauser <cpraehaus@cosy.sbg.ac.at>,
47 * Paris Lodron University of Salzburg.
48 */
49
50 /*
51 * FIXME / TODO (dvb_net.c):
52 *
53 * Unloading does not work for 2.6.9 kernels: a refcount doesn't go to zero.
54 *
55 */
56
57 #define pr_fmt(fmt) "dvb_net: " fmt
58
59 #include <linux/module.h>
60 #include <linux/kernel.h>
61 #include <linux/netdevice.h>
62 #include <linux/etherdevice.h>
63 #include <linux/dvb/net.h>
64 #include <linux/uio.h>
65 #include <asm/uaccess.h>
66 #include <linux/crc32.h>
67 #include <linux/mutex.h>
68 #include <linux/sched.h>
69
70 #include "dvb_demux.h"
71 #include "dvb_net.h"
72
73 static inline __u32 iov_crc32( __u32 c, struct kvec *iov, unsigned int cnt )
74 {
75 unsigned int j;
76 for (j = 0; j < cnt; j++)
77 c = crc32_be( c, iov[j].iov_base, iov[j].iov_len );
78 return c;
79 }
80
81
82 #define DVB_NET_MULTICAST_MAX 10
83
84 #undef ULE_DEBUG
85
86 #ifdef ULE_DEBUG
87
88 static void hexdump(const unsigned char *buf, unsigned short len)
89 {
90 print_hex_dump_debug("", DUMP_PREFIX_OFFSET, 16, 1, buf, len, true);
91 }
92
93 #endif
94
95 struct dvb_net_priv {
96 int in_use;
97 u16 pid;
98 struct net_device *net;
99 struct dvb_net *host;
100 struct dmx_demux *demux;
101 struct dmx_section_feed *secfeed;
102 struct dmx_section_filter *secfilter;
103 struct dmx_ts_feed *tsfeed;
104 int multi_num;
105 struct dmx_section_filter *multi_secfilter[DVB_NET_MULTICAST_MAX];
106 unsigned char multi_macs[DVB_NET_MULTICAST_MAX][6];
107 int rx_mode;
108 #define RX_MODE_UNI 0
109 #define RX_MODE_MULTI 1
110 #define RX_MODE_ALL_MULTI 2
111 #define RX_MODE_PROMISC 3
112 struct work_struct set_multicast_list_wq;
113 struct work_struct restart_net_feed_wq;
114 unsigned char feedtype; /* Either FEED_TYPE_ or FEED_TYPE_ULE */
115 int need_pusi; /* Set to 1, if synchronization on PUSI required. */
116 unsigned char tscc; /* TS continuity counter after sync on PUSI. */
117 struct sk_buff *ule_skb; /* ULE SNDU decodes into this buffer. */
118 unsigned char *ule_next_hdr; /* Pointer into skb to next ULE extension header. */
119 unsigned short ule_sndu_len; /* ULE SNDU length in bytes, w/o D-Bit. */
120 unsigned short ule_sndu_type; /* ULE SNDU type field, complete. */
121 unsigned char ule_sndu_type_1; /* ULE SNDU type field, if split across 2 TS cells. */
122 unsigned char ule_dbit; /* Whether the DestMAC address present
123 * or not (bit is set). */
124 unsigned char ule_bridged; /* Whether the ULE_BRIDGED extension header was found. */
125 int ule_sndu_remain; /* Nr. of bytes still required for current ULE SNDU. */
126 unsigned long ts_count; /* Current ts cell counter. */
127 struct mutex mutex;
128 };
129
130
131 /**
132 * Determine the packet's protocol ID. The rule here is that we
133 * assume 802.3 if the type field is short enough to be a length.
134 * This is normal practice and works for any 'now in use' protocol.
135 *
136 * stolen from eth.c out of the linux kernel, hacked for dvb-device
137 * by Michael Holzt <kju@debian.org>
138 */
139 static __be16 dvb_net_eth_type_trans(struct sk_buff *skb,
140 struct net_device *dev)
141 {
142 struct ethhdr *eth;
143 unsigned char *rawp;
144
145 skb_reset_mac_header(skb);
146 skb_pull(skb,dev->hard_header_len);
147 eth = eth_hdr(skb);
148
149 if (*eth->h_dest & 1) {
150 if(ether_addr_equal(eth->h_dest,dev->broadcast))
151 skb->pkt_type=PACKET_BROADCAST;
152 else
153 skb->pkt_type=PACKET_MULTICAST;
154 }
155
156 if (ntohs(eth->h_proto) >= ETH_P_802_3_MIN)
157 return eth->h_proto;
158
159 rawp = skb->data;
160
161 /**
162 * This is a magic hack to spot IPX packets. Older Novell breaks
163 * the protocol design and runs IPX over 802.3 without an 802.2 LLC
164 * layer. We look for FFFF which isn't a used 802.2 SSAP/DSAP. This
165 * won't work for fault tolerant netware but does for the rest.
166 */
167 if (*(unsigned short *)rawp == 0xFFFF)
168 return htons(ETH_P_802_3);
169
170 /**
171 * Real 802.2 LLC
172 */
173 return htons(ETH_P_802_2);
174 }
175
176 #define TS_SZ 188
177 #define TS_SYNC 0x47
178 #define TS_TEI 0x80
179 #define TS_SC 0xC0
180 #define TS_PUSI 0x40
181 #define TS_AF_A 0x20
182 #define TS_AF_D 0x10
183
184 /* ULE Extension Header handlers. */
185
186 #define ULE_TEST 0
187 #define ULE_BRIDGED 1
188
189 #define ULE_OPTEXTHDR_PADDING 0
190
191 static int ule_test_sndu( struct dvb_net_priv *p )
192 {
193 return -1;
194 }
195
196 static int ule_bridged_sndu( struct dvb_net_priv *p )
197 {
198 struct ethhdr *hdr = (struct ethhdr*) p->ule_next_hdr;
199 if(ntohs(hdr->h_proto) < ETH_P_802_3_MIN) {
200 int framelen = p->ule_sndu_len - ((p->ule_next_hdr+sizeof(struct ethhdr)) - p->ule_skb->data);
201 /* A frame Type < ETH_P_802_3_MIN for a bridged frame, introduces a LLC Length field. */
202 if(framelen != ntohs(hdr->h_proto)) {
203 return -1;
204 }
205 }
206 /* Note:
207 * From RFC4326:
208 * "A bridged SNDU is a Mandatory Extension Header of Type 1.
209 * It must be the final (or only) extension header specified in the header chain of a SNDU."
210 * The 'ule_bridged' flag will cause the extension header processing loop to terminate.
211 */
212 p->ule_bridged = 1;
213 return 0;
214 }
215
216 static int ule_exthdr_padding(struct dvb_net_priv *p)
217 {
218 return 0;
219 }
220
221 /** Handle ULE extension headers.
222 * Function is called after a successful CRC32 verification of an ULE SNDU to complete its decoding.
223 * Returns: >= 0: nr. of bytes consumed by next extension header
224 * -1: Mandatory extension header that is not recognized or TEST SNDU; discard.
225 */
226 static int handle_one_ule_extension( struct dvb_net_priv *p )
227 {
228 /* Table of mandatory extension header handlers. The header type is the index. */
229 static int (*ule_mandatory_ext_handlers[255])( struct dvb_net_priv *p ) =
230 { [0] = ule_test_sndu, [1] = ule_bridged_sndu, [2] = NULL, };
231
232 /* Table of optional extension header handlers. The header type is the index. */
233 static int (*ule_optional_ext_handlers[255])( struct dvb_net_priv *p ) =
234 { [0] = ule_exthdr_padding, [1] = NULL, };
235
236 int ext_len = 0;
237 unsigned char hlen = (p->ule_sndu_type & 0x0700) >> 8;
238 unsigned char htype = p->ule_sndu_type & 0x00FF;
239
240 /* Discriminate mandatory and optional extension headers. */
241 if (hlen == 0) {
242 /* Mandatory extension header */
243 if (ule_mandatory_ext_handlers[htype]) {
244 ext_len = ule_mandatory_ext_handlers[htype]( p );
245 if(ext_len >= 0) {
246 p->ule_next_hdr += ext_len;
247 if (!p->ule_bridged) {
248 p->ule_sndu_type = ntohs(*(__be16 *)p->ule_next_hdr);
249 p->ule_next_hdr += 2;
250 } else {
251 p->ule_sndu_type = ntohs(*(__be16 *)(p->ule_next_hdr + ((p->ule_dbit ? 2 : 3) * ETH_ALEN)));
252 /* This assures the extension handling loop will terminate. */
253 }
254 }
255 // else: extension handler failed or SNDU should be discarded
256 } else
257 ext_len = -1; /* SNDU has to be discarded. */
258 } else {
259 /* Optional extension header. Calculate the length. */
260 ext_len = hlen << 1;
261 /* Process the optional extension header according to its type. */
262 if (ule_optional_ext_handlers[htype])
263 (void)ule_optional_ext_handlers[htype]( p );
264 p->ule_next_hdr += ext_len;
265 p->ule_sndu_type = ntohs( *(__be16 *)(p->ule_next_hdr-2) );
266 /*
267 * note: the length of the next header type is included in the
268 * length of THIS optional extension header
269 */
270 }
271
272 return ext_len;
273 }
274
275 static int handle_ule_extensions( struct dvb_net_priv *p )
276 {
277 int total_ext_len = 0, l;
278
279 p->ule_next_hdr = p->ule_skb->data;
280 do {
281 l = handle_one_ule_extension( p );
282 if (l < 0)
283 return l; /* Stop extension header processing and discard SNDU. */
284 total_ext_len += l;
285 #ifdef ULE_DEBUG
286 pr_debug("ule_next_hdr=%p, ule_sndu_type=%i, l=%i, total_ext_len=%i\n",
287 p->ule_next_hdr, (int)p->ule_sndu_type,
288 l, total_ext_len);
289 #endif
290
291 } while (p->ule_sndu_type < ETH_P_802_3_MIN);
292
293 return total_ext_len;
294 }
295
296
297 /** Prepare for a new ULE SNDU: reset the decoder state. */
298 static inline void reset_ule( struct dvb_net_priv *p )
299 {
300 p->ule_skb = NULL;
301 p->ule_next_hdr = NULL;
302 p->ule_sndu_len = 0;
303 p->ule_sndu_type = 0;
304 p->ule_sndu_type_1 = 0;
305 p->ule_sndu_remain = 0;
306 p->ule_dbit = 0xFF;
307 p->ule_bridged = 0;
308 }
309
310 /**
311 * Decode ULE SNDUs according to draft-ietf-ipdvb-ule-03.txt from a sequence of
312 * TS cells of a single PID.
313 */
314 static void dvb_net_ule( struct net_device *dev, const u8 *buf, size_t buf_len )
315 {
316 struct dvb_net_priv *priv = netdev_priv(dev);
317 unsigned long skipped = 0L;
318 const u8 *ts, *ts_end, *from_where = NULL;
319 u8 ts_remain = 0, how_much = 0, new_ts = 1;
320 struct ethhdr *ethh = NULL;
321 bool error = false;
322
323 #ifdef ULE_DEBUG
324 /* The code inside ULE_DEBUG keeps a history of the last 100 TS cells processed. */
325 static unsigned char ule_hist[100*TS_SZ];
326 static unsigned char *ule_where = ule_hist, ule_dump;
327 #endif
328
329 /* For all TS cells in current buffer.
330 * Appearently, we are called for every single TS cell.
331 */
332 for (ts = buf, ts_end = buf + buf_len; ts < ts_end; /* no default incr. */ ) {
333
334 if (new_ts) {
335 /* We are about to process a new TS cell. */
336
337 #ifdef ULE_DEBUG
338 if (ule_where >= &ule_hist[100*TS_SZ]) ule_where = ule_hist;
339 memcpy( ule_where, ts, TS_SZ );
340 if (ule_dump) {
341 hexdump( ule_where, TS_SZ );
342 ule_dump = 0;
343 }
344 ule_where += TS_SZ;
345 #endif
346
347 /* Check TS error conditions: sync_byte, transport_error_indicator, scrambling_control . */
348 if ((ts[0] != TS_SYNC) || (ts[1] & TS_TEI) || ((ts[3] & TS_SC) != 0)) {
349 pr_warn("%lu: Invalid TS cell: SYNC %#x, TEI %u, SC %#x.\n",
350 priv->ts_count, ts[0],
351 (ts[1] & TS_TEI) >> 7,
352 (ts[3] & TS_SC) >> 6);
353
354 /* Drop partly decoded SNDU, reset state, resync on PUSI. */
355 if (priv->ule_skb) {
356 dev_kfree_skb( priv->ule_skb );
357 /* Prepare for next SNDU. */
358 dev->stats.rx_errors++;
359 dev->stats.rx_frame_errors++;
360 }
361 reset_ule(priv);
362 priv->need_pusi = 1;
363
364 /* Continue with next TS cell. */
365 ts += TS_SZ;
366 priv->ts_count++;
367 continue;
368 }
369
370 ts_remain = 184;
371 from_where = ts + 4;
372 }
373 /* Synchronize on PUSI, if required. */
374 if (priv->need_pusi) {
375 if (ts[1] & TS_PUSI) {
376 /* Find beginning of first ULE SNDU in current TS cell. */
377 /* Synchronize continuity counter. */
378 priv->tscc = ts[3] & 0x0F;
379 /* There is a pointer field here. */
380 if (ts[4] > ts_remain) {
381 pr_err("%lu: Invalid ULE packet (pointer field %d)\n",
382 priv->ts_count, ts[4]);
383 ts += TS_SZ;
384 priv->ts_count++;
385 continue;
386 }
387 /* Skip to destination of pointer field. */
388 from_where = &ts[5] + ts[4];
389 ts_remain -= 1 + ts[4];
390 skipped = 0;
391 } else {
392 skipped++;
393 ts += TS_SZ;
394 priv->ts_count++;
395 continue;
396 }
397 }
398
399 if (new_ts) {
400 /* Check continuity counter. */
401 if ((ts[3] & 0x0F) == priv->tscc)
402 priv->tscc = (priv->tscc + 1) & 0x0F;
403 else {
404 /* TS discontinuity handling: */
405 pr_warn("%lu: TS discontinuity: got %#x, expected %#x.\n",
406 priv->ts_count, ts[3] & 0x0F,
407 priv->tscc);
408 /* Drop partly decoded SNDU, reset state, resync on PUSI. */
409 if (priv->ule_skb) {
410 dev_kfree_skb( priv->ule_skb );
411 /* Prepare for next SNDU. */
412 // reset_ule(priv); moved to below.
413 dev->stats.rx_errors++;
414 dev->stats.rx_frame_errors++;
415 }
416 reset_ule(priv);
417 /* skip to next PUSI. */
418 priv->need_pusi = 1;
419 continue;
420 }
421 /* If we still have an incomplete payload, but PUSI is
422 * set; some TS cells are missing.
423 * This is only possible here, if we missed exactly 16 TS
424 * cells (continuity counter wrap). */
425 if (ts[1] & TS_PUSI) {
426 if (! priv->need_pusi) {
427 if (!(*from_where < (ts_remain-1)) || *from_where != priv->ule_sndu_remain) {
428 /* Pointer field is invalid. Drop this TS cell and any started ULE SNDU. */
429 pr_warn("%lu: Invalid pointer field: %u.\n",
430 priv->ts_count,
431 *from_where);
432
433 /* Drop partly decoded SNDU, reset state, resync on PUSI. */
434 if (priv->ule_skb) {
435 error = true;
436 dev_kfree_skb(priv->ule_skb);
437 }
438
439 if (error || priv->ule_sndu_remain) {
440 dev->stats.rx_errors++;
441 dev->stats.rx_frame_errors++;
442 error = false;
443 }
444
445 reset_ule(priv);
446 priv->need_pusi = 1;
447 continue;
448 }
449 /* Skip pointer field (we're processing a
450 * packed payload). */
451 from_where += 1;
452 ts_remain -= 1;
453 } else
454 priv->need_pusi = 0;
455
456 if (priv->ule_sndu_remain > 183) {
457 /* Current SNDU lacks more data than there could be available in the
458 * current TS cell. */
459 dev->stats.rx_errors++;
460 dev->stats.rx_length_errors++;
461 pr_warn("%lu: Expected %d more SNDU bytes, but got PUSI (pf %d, ts_remain %d). Flushing incomplete payload.\n",
462 priv->ts_count,
463 priv->ule_sndu_remain,
464 ts[4], ts_remain);
465 dev_kfree_skb(priv->ule_skb);
466 /* Prepare for next SNDU. */
467 reset_ule(priv);
468 /* Resync: go to where pointer field points to: start of next ULE SNDU. */
469 from_where += ts[4];
470 ts_remain -= ts[4];
471 }
472 }
473 }
474
475 /* Check if new payload needs to be started. */
476 if (priv->ule_skb == NULL) {
477 /* Start a new payload with skb.
478 * Find ULE header. It is only guaranteed that the
479 * length field (2 bytes) is contained in the current
480 * TS.
481 * Check ts_remain has to be >= 2 here. */
482 if (ts_remain < 2) {
483 pr_warn("Invalid payload packing: only %d bytes left in TS. Resyncing.\n",
484 ts_remain);
485 priv->ule_sndu_len = 0;
486 priv->need_pusi = 1;
487 ts += TS_SZ;
488 continue;
489 }
490
491 if (! priv->ule_sndu_len) {
492 /* Got at least two bytes, thus extrace the SNDU length. */
493 priv->ule_sndu_len = from_where[0] << 8 | from_where[1];
494 if (priv->ule_sndu_len & 0x8000) {
495 /* D-Bit is set: no dest mac present. */
496 priv->ule_sndu_len &= 0x7FFF;
497 priv->ule_dbit = 1;
498 } else
499 priv->ule_dbit = 0;
500
501 if (priv->ule_sndu_len < 5) {
502 pr_warn("%lu: Invalid ULE SNDU length %u. Resyncing.\n",
503 priv->ts_count,
504 priv->ule_sndu_len);
505 dev->stats.rx_errors++;
506 dev->stats.rx_length_errors++;
507 priv->ule_sndu_len = 0;
508 priv->need_pusi = 1;
509 new_ts = 1;
510 ts += TS_SZ;
511 priv->ts_count++;
512 continue;
513 }
514 ts_remain -= 2; /* consume the 2 bytes SNDU length. */
515 from_where += 2;
516 }
517
518 priv->ule_sndu_remain = priv->ule_sndu_len + 2;
519 /*
520 * State of current TS:
521 * ts_remain (remaining bytes in the current TS cell)
522 * 0 ule_type is not available now, we need the next TS cell
523 * 1 the first byte of the ule_type is present
524 * >=2 full ULE header present, maybe some payload data as well.
525 */
526 switch (ts_remain) {
527 case 1:
528 priv->ule_sndu_remain--;
529 priv->ule_sndu_type = from_where[0] << 8;
530 priv->ule_sndu_type_1 = 1; /* first byte of ule_type is set. */
531 ts_remain -= 1; from_where += 1;
532 /* Continue w/ next TS. */
533 case 0:
534 new_ts = 1;
535 ts += TS_SZ;
536 priv->ts_count++;
537 continue;
538
539 default: /* complete ULE header is present in current TS. */
540 /* Extract ULE type field. */
541 if (priv->ule_sndu_type_1) {
542 priv->ule_sndu_type_1 = 0;
543 priv->ule_sndu_type |= from_where[0];
544 from_where += 1; /* points to payload start. */
545 ts_remain -= 1;
546 } else {
547 /* Complete type is present in new TS. */
548 priv->ule_sndu_type = from_where[0] << 8 | from_where[1];
549 from_where += 2; /* points to payload start. */
550 ts_remain -= 2;
551 }
552 break;
553 }
554
555 /* Allocate the skb (decoder target buffer) with the correct size, as follows:
556 * prepare for the largest case: bridged SNDU with MAC address (dbit = 0). */
557 priv->ule_skb = dev_alloc_skb( priv->ule_sndu_len + ETH_HLEN + ETH_ALEN );
558 if (priv->ule_skb == NULL) {
559 pr_notice("%s: Memory squeeze, dropping packet.\n",
560 dev->name);
561 dev->stats.rx_dropped++;
562 return;
563 }
564
565 /* This includes the CRC32 _and_ dest mac, if !dbit. */
566 priv->ule_sndu_remain = priv->ule_sndu_len;
567 priv->ule_skb->dev = dev;
568 /* Leave space for Ethernet or bridged SNDU header (eth hdr plus one MAC addr). */
569 skb_reserve( priv->ule_skb, ETH_HLEN + ETH_ALEN );
570 }
571
572 /* Copy data into our current skb. */
573 how_much = min(priv->ule_sndu_remain, (int)ts_remain);
574 memcpy(skb_put(priv->ule_skb, how_much), from_where, how_much);
575 priv->ule_sndu_remain -= how_much;
576 ts_remain -= how_much;
577 from_where += how_much;
578
579 /* Check for complete payload. */
580 if (priv->ule_sndu_remain <= 0) {
581 /* Check CRC32, we've got it in our skb already. */
582 __be16 ulen = htons(priv->ule_sndu_len);
583 __be16 utype = htons(priv->ule_sndu_type);
584 const u8 *tail;
585 struct kvec iov[3] = {
586 { &ulen, sizeof ulen },
587 { &utype, sizeof utype },
588 { priv->ule_skb->data, priv->ule_skb->len - 4 }
589 };
590 u32 ule_crc = ~0L, expected_crc;
591 if (priv->ule_dbit) {
592 /* Set D-bit for CRC32 verification,
593 * if it was set originally. */
594 ulen |= htons(0x8000);
595 }
596
597 ule_crc = iov_crc32(ule_crc, iov, 3);
598 tail = skb_tail_pointer(priv->ule_skb);
599 expected_crc = *(tail - 4) << 24 |
600 *(tail - 3) << 16 |
601 *(tail - 2) << 8 |
602 *(tail - 1);
603 if (ule_crc != expected_crc) {
604 pr_warn("%lu: CRC32 check FAILED: %08x / %08x, SNDU len %d type %#x, ts_remain %d, next 2: %x.\n",
605 priv->ts_count, ule_crc, expected_crc,
606 priv->ule_sndu_len, priv->ule_sndu_type,
607 ts_remain,
608 ts_remain > 2 ? *(unsigned short *)from_where : 0);
609
610 #ifdef ULE_DEBUG
611 hexdump( iov[0].iov_base, iov[0].iov_len );
612 hexdump( iov[1].iov_base, iov[1].iov_len );
613 hexdump( iov[2].iov_base, iov[2].iov_len );
614
615 if (ule_where == ule_hist) {
616 hexdump( &ule_hist[98*TS_SZ], TS_SZ );
617 hexdump( &ule_hist[99*TS_SZ], TS_SZ );
618 } else if (ule_where == &ule_hist[TS_SZ]) {
619 hexdump( &ule_hist[99*TS_SZ], TS_SZ );
620 hexdump( ule_hist, TS_SZ );
621 } else {
622 hexdump( ule_where - TS_SZ - TS_SZ, TS_SZ );
623 hexdump( ule_where - TS_SZ, TS_SZ );
624 }
625 ule_dump = 1;
626 #endif
627
628 dev->stats.rx_errors++;
629 dev->stats.rx_crc_errors++;
630 dev_kfree_skb(priv->ule_skb);
631 } else {
632 /* CRC32 verified OK. */
633 u8 dest_addr[ETH_ALEN];
634 static const u8 bc_addr[ETH_ALEN] =
635 { [ 0 ... ETH_ALEN-1] = 0xff };
636
637 /* CRC32 was OK. Remove it from skb. */
638 priv->ule_skb->tail -= 4;
639 priv->ule_skb->len -= 4;
640
641 if (!priv->ule_dbit) {
642 /*
643 * The destination MAC address is the
644 * next data in the skb. It comes
645 * before any extension headers.
646 *
647 * Check if the payload of this SNDU
648 * should be passed up the stack.
649 */
650 register int drop = 0;
651 if (priv->rx_mode != RX_MODE_PROMISC) {
652 if (priv->ule_skb->data[0] & 0x01) {
653 /* multicast or broadcast */
654 if (!ether_addr_equal(priv->ule_skb->data, bc_addr)) {
655 /* multicast */
656 if (priv->rx_mode == RX_MODE_MULTI) {
657 int i;
658 for(i = 0; i < priv->multi_num &&
659 !ether_addr_equal(priv->ule_skb->data,
660 priv->multi_macs[i]); i++)
661 ;
662 if (i == priv->multi_num)
663 drop = 1;
664 } else if (priv->rx_mode != RX_MODE_ALL_MULTI)
665 drop = 1; /* no broadcast; */
666 /* else: all multicast mode: accept all multicast packets */
667 }
668 /* else: broadcast */
669 }
670 else if (!ether_addr_equal(priv->ule_skb->data, dev->dev_addr))
671 drop = 1;
672 /* else: destination address matches the MAC address of our receiver device */
673 }
674 /* else: promiscuous mode; pass everything up the stack */
675
676 if (drop) {
677 #ifdef ULE_DEBUG
678 netdev_dbg(dev, "Dropping SNDU: MAC destination address does not match: dest addr: %pM, dev addr: %pM\n",
679 priv->ule_skb->data, dev->dev_addr);
680 #endif
681 dev_kfree_skb(priv->ule_skb);
682 goto sndu_done;
683 }
684 else
685 {
686 skb_copy_from_linear_data(priv->ule_skb,
687 dest_addr,
688 ETH_ALEN);
689 skb_pull(priv->ule_skb, ETH_ALEN);
690 }
691 }
692
693 /* Handle ULE Extension Headers. */
694 if (priv->ule_sndu_type < ETH_P_802_3_MIN) {
695 /* There is an extension header. Handle it accordingly. */
696 int l = handle_ule_extensions(priv);
697 if (l < 0) {
698 /* Mandatory extension header unknown or TEST SNDU. Drop it. */
699 // pr_warn("Dropping SNDU, extension headers.\n" );
700 dev_kfree_skb(priv->ule_skb);
701 goto sndu_done;
702 }
703 skb_pull(priv->ule_skb, l);
704 }
705
706 /*
707 * Construct/assure correct ethernet header.
708 * Note: in bridged mode (priv->ule_bridged !=
709 * 0) we already have the (original) ethernet
710 * header at the start of the payload (after
711 * optional dest. address and any extension
712 * headers).
713 */
714
715 if (!priv->ule_bridged) {
716 skb_push(priv->ule_skb, ETH_HLEN);
717 ethh = (struct ethhdr *)priv->ule_skb->data;
718 if (!priv->ule_dbit) {
719 /* dest_addr buffer is only valid if priv->ule_dbit == 0 */
720 memcpy(ethh->h_dest, dest_addr, ETH_ALEN);
721 eth_zero_addr(ethh->h_source);
722 }
723 else /* zeroize source and dest */
724 memset( ethh, 0, ETH_ALEN*2 );
725
726 ethh->h_proto = htons(priv->ule_sndu_type);
727 }
728 /* else: skb is in correct state; nothing to do. */
729 priv->ule_bridged = 0;
730
731 /* Stuff into kernel's protocol stack. */
732 priv->ule_skb->protocol = dvb_net_eth_type_trans(priv->ule_skb, dev);
733 /* If D-bit is set (i.e. destination MAC address not present),
734 * receive the packet anyhow. */
735 /* if (priv->ule_dbit && skb->pkt_type == PACKET_OTHERHOST)
736 priv->ule_skb->pkt_type = PACKET_HOST; */
737 dev->stats.rx_packets++;
738 dev->stats.rx_bytes += priv->ule_skb->len;
739 netif_rx(priv->ule_skb);
740 }
741 sndu_done:
742 /* Prepare for next SNDU. */
743 reset_ule(priv);
744 }
745
746 /* More data in current TS (look at the bytes following the CRC32)? */
747 if (ts_remain >= 2 && *((unsigned short *)from_where) != 0xFFFF) {
748 /* Next ULE SNDU starts right there. */
749 new_ts = 0;
750 priv->ule_skb = NULL;
751 priv->ule_sndu_type_1 = 0;
752 priv->ule_sndu_len = 0;
753 // pr_warn("More data in current TS: [%#x %#x %#x %#x]\n",
754 // *(from_where + 0), *(from_where + 1),
755 // *(from_where + 2), *(from_where + 3));
756 // pr_warn("ts @ %p, stopped @ %p:\n", ts, from_where + 0);
757 // hexdump(ts, 188);
758 } else {
759 new_ts = 1;
760 ts += TS_SZ;
761 priv->ts_count++;
762 if (priv->ule_skb == NULL) {
763 priv->need_pusi = 1;
764 priv->ule_sndu_type_1 = 0;
765 priv->ule_sndu_len = 0;
766 }
767 }
768 } /* for all available TS cells */
769 }
770
771 static int dvb_net_ts_callback(const u8 *buffer1, size_t buffer1_len,
772 const u8 *buffer2, size_t buffer2_len,
773 struct dmx_ts_feed *feed)
774 {
775 struct net_device *dev = feed->priv;
776
777 if (buffer2)
778 pr_warn("buffer2 not NULL: %p.\n", buffer2);
779 if (buffer1_len > 32768)
780 pr_warn("length > 32k: %zu.\n", buffer1_len);
781 /* pr_info("TS callback: %u bytes, %u TS cells @ %p.\n",
782 buffer1_len, buffer1_len / TS_SZ, buffer1); */
783 dvb_net_ule(dev, buffer1, buffer1_len);
784 return 0;
785 }
786
787
788 static void dvb_net_sec(struct net_device *dev,
789 const u8 *pkt, int pkt_len)
790 {
791 u8 *eth;
792 struct sk_buff *skb;
793 struct net_device_stats *stats = &dev->stats;
794 int snap = 0;
795
796 /* note: pkt_len includes a 32bit checksum */
797 if (pkt_len < 16) {
798 pr_warn("%s: IP/MPE packet length = %d too small.\n",
799 dev->name, pkt_len);
800 stats->rx_errors++;
801 stats->rx_length_errors++;
802 return;
803 }
804 /* it seems some ISPs manage to screw up here, so we have to
805 * relax the error checks... */
806 #if 0
807 if ((pkt[5] & 0xfd) != 0xc1) {
808 /* drop scrambled or broken packets */
809 #else
810 if ((pkt[5] & 0x3c) != 0x00) {
811 /* drop scrambled */
812 #endif
813 stats->rx_errors++;
814 stats->rx_crc_errors++;
815 return;
816 }
817 if (pkt[5] & 0x02) {
818 /* handle LLC/SNAP, see rfc-1042 */
819 if (pkt_len < 24 || memcmp(&pkt[12], "\xaa\xaa\x03\0\0\0", 6)) {
820 stats->rx_dropped++;
821 return;
822 }
823 snap = 8;
824 }
825 if (pkt[7]) {
826 /* FIXME: assemble datagram from multiple sections */
827 stats->rx_errors++;
828 stats->rx_frame_errors++;
829 return;
830 }
831
832 /* we have 14 byte ethernet header (ip header follows);
833 * 12 byte MPE header; 4 byte checksum; + 2 byte alignment, 8 byte LLC/SNAP
834 */
835 if (!(skb = dev_alloc_skb(pkt_len - 4 - 12 + 14 + 2 - snap))) {
836 //pr_notice("%s: Memory squeeze, dropping packet.\n", dev->name);
837 stats->rx_dropped++;
838 return;
839 }
840 skb_reserve(skb, 2); /* longword align L3 header */
841 skb->dev = dev;
842
843 /* copy L3 payload */
844 eth = (u8 *) skb_put(skb, pkt_len - 12 - 4 + 14 - snap);
845 memcpy(eth + 14, pkt + 12 + snap, pkt_len - 12 - 4 - snap);
846
847 /* create ethernet header: */
848 eth[0]=pkt[0x0b];
849 eth[1]=pkt[0x0a];
850 eth[2]=pkt[0x09];
851 eth[3]=pkt[0x08];
852 eth[4]=pkt[0x04];
853 eth[5]=pkt[0x03];
854
855 eth[6]=eth[7]=eth[8]=eth[9]=eth[10]=eth[11]=0;
856
857 if (snap) {
858 eth[12] = pkt[18];
859 eth[13] = pkt[19];
860 } else {
861 /* protocol numbers are from rfc-1700 or
862 * http://www.iana.org/assignments/ethernet-numbers
863 */
864 if (pkt[12] >> 4 == 6) { /* version field from IP header */
865 eth[12] = 0x86; /* IPv6 */
866 eth[13] = 0xdd;
867 } else {
868 eth[12] = 0x08; /* IPv4 */
869 eth[13] = 0x00;
870 }
871 }
872
873 skb->protocol = dvb_net_eth_type_trans(skb, dev);
874
875 stats->rx_packets++;
876 stats->rx_bytes+=skb->len;
877 netif_rx(skb);
878 }
879
880 static int dvb_net_sec_callback(const u8 *buffer1, size_t buffer1_len,
881 const u8 *buffer2, size_t buffer2_len,
882 struct dmx_section_filter *filter)
883 {
884 struct net_device *dev = filter->priv;
885
886 /**
887 * we rely on the DVB API definition where exactly one complete
888 * section is delivered in buffer1
889 */
890 dvb_net_sec (dev, buffer1, buffer1_len);
891 return 0;
892 }
893
894 static int dvb_net_tx(struct sk_buff *skb, struct net_device *dev)
895 {
896 dev_kfree_skb(skb);
897 return NETDEV_TX_OK;
898 }
899
900 static u8 mask_normal[6]={0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
901 static u8 mask_allmulti[6]={0xff, 0xff, 0xff, 0x00, 0x00, 0x00};
902 static u8 mac_allmulti[6]={0x01, 0x00, 0x5e, 0x00, 0x00, 0x00};
903 static u8 mask_promisc[6]={0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
904
905 static int dvb_net_filter_sec_set(struct net_device *dev,
906 struct dmx_section_filter **secfilter,
907 u8 *mac, u8 *mac_mask)
908 {
909 struct dvb_net_priv *priv = netdev_priv(dev);
910 int ret;
911
912 *secfilter=NULL;
913 ret = priv->secfeed->allocate_filter(priv->secfeed, secfilter);
914 if (ret<0) {
915 pr_err("%s: could not get filter\n", dev->name);
916 return ret;
917 }
918
919 (*secfilter)->priv=(void *) dev;
920
921 memset((*secfilter)->filter_value, 0x00, DMX_MAX_FILTER_SIZE);
922 memset((*secfilter)->filter_mask, 0x00, DMX_MAX_FILTER_SIZE);
923 memset((*secfilter)->filter_mode, 0xff, DMX_MAX_FILTER_SIZE);
924
925 (*secfilter)->filter_value[0]=0x3e;
926 (*secfilter)->filter_value[3]=mac[5];
927 (*secfilter)->filter_value[4]=mac[4];
928 (*secfilter)->filter_value[8]=mac[3];
929 (*secfilter)->filter_value[9]=mac[2];
930 (*secfilter)->filter_value[10]=mac[1];
931 (*secfilter)->filter_value[11]=mac[0];
932
933 (*secfilter)->filter_mask[0] = 0xff;
934 (*secfilter)->filter_mask[3] = mac_mask[5];
935 (*secfilter)->filter_mask[4] = mac_mask[4];
936 (*secfilter)->filter_mask[8] = mac_mask[3];
937 (*secfilter)->filter_mask[9] = mac_mask[2];
938 (*secfilter)->filter_mask[10] = mac_mask[1];
939 (*secfilter)->filter_mask[11]=mac_mask[0];
940
941 netdev_dbg(dev, "filter mac=%pM mask=%pM\n", mac, mac_mask);
942
943 return 0;
944 }
945
946 static int dvb_net_feed_start(struct net_device *dev)
947 {
948 int ret = 0, i;
949 struct dvb_net_priv *priv = netdev_priv(dev);
950 struct dmx_demux *demux = priv->demux;
951 unsigned char *mac = (unsigned char *) dev->dev_addr;
952
953 netdev_dbg(dev, "rx_mode %i\n", priv->rx_mode);
954 mutex_lock(&priv->mutex);
955 if (priv->tsfeed || priv->secfeed || priv->secfilter || priv->multi_secfilter[0])
956 pr_err("%s: BUG %d\n", __func__, __LINE__);
957
958 priv->secfeed=NULL;
959 priv->secfilter=NULL;
960 priv->tsfeed = NULL;
961
962 if (priv->feedtype == DVB_NET_FEEDTYPE_MPE) {
963 netdev_dbg(dev, "alloc secfeed\n");
964 ret=demux->allocate_section_feed(demux, &priv->secfeed,
965 dvb_net_sec_callback);
966 if (ret<0) {
967 pr_err("%s: could not allocate section feed\n",
968 dev->name);
969 goto error;
970 }
971
972 ret = priv->secfeed->set(priv->secfeed, priv->pid, 32768, 1);
973
974 if (ret<0) {
975 pr_err("%s: could not set section feed\n", dev->name);
976 priv->demux->release_section_feed(priv->demux, priv->secfeed);
977 priv->secfeed=NULL;
978 goto error;
979 }
980
981 if (priv->rx_mode != RX_MODE_PROMISC) {
982 netdev_dbg(dev, "set secfilter\n");
983 dvb_net_filter_sec_set(dev, &priv->secfilter, mac, mask_normal);
984 }
985
986 switch (priv->rx_mode) {
987 case RX_MODE_MULTI:
988 for (i = 0; i < priv->multi_num; i++) {
989 netdev_dbg(dev, "set multi_secfilter[%d]\n", i);
990 dvb_net_filter_sec_set(dev, &priv->multi_secfilter[i],
991 priv->multi_macs[i], mask_normal);
992 }
993 break;
994 case RX_MODE_ALL_MULTI:
995 priv->multi_num=1;
996 netdev_dbg(dev, "set multi_secfilter[0]\n");
997 dvb_net_filter_sec_set(dev, &priv->multi_secfilter[0],
998 mac_allmulti, mask_allmulti);
999 break;
1000 case RX_MODE_PROMISC:
1001 priv->multi_num=0;
1002 netdev_dbg(dev, "set secfilter\n");
1003 dvb_net_filter_sec_set(dev, &priv->secfilter, mac, mask_promisc);
1004 break;
1005 }
1006
1007 netdev_dbg(dev, "start filtering\n");
1008 priv->secfeed->start_filtering(priv->secfeed);
1009 } else if (priv->feedtype == DVB_NET_FEEDTYPE_ULE) {
1010 ktime_t timeout = ns_to_ktime(10 * NSEC_PER_MSEC);
1011
1012 /* we have payloads encapsulated in TS */
1013 netdev_dbg(dev, "alloc tsfeed\n");
1014 ret = demux->allocate_ts_feed(demux, &priv->tsfeed, dvb_net_ts_callback);
1015 if (ret < 0) {
1016 pr_err("%s: could not allocate ts feed\n", dev->name);
1017 goto error;
1018 }
1019
1020 /* Set netdevice pointer for ts decaps callback. */
1021 priv->tsfeed->priv = (void *)dev;
1022 ret = priv->tsfeed->set(priv->tsfeed,
1023 priv->pid, /* pid */
1024 TS_PACKET, /* type */
1025 DMX_PES_OTHER, /* pes type */
1026 32768, /* circular buffer size */
1027 timeout /* timeout */
1028 );
1029
1030 if (ret < 0) {
1031 pr_err("%s: could not set ts feed\n", dev->name);
1032 priv->demux->release_ts_feed(priv->demux, priv->tsfeed);
1033 priv->tsfeed = NULL;
1034 goto error;
1035 }
1036
1037 netdev_dbg(dev, "start filtering\n");
1038 priv->tsfeed->start_filtering(priv->tsfeed);
1039 } else
1040 ret = -EINVAL;
1041
1042 error:
1043 mutex_unlock(&priv->mutex);
1044 return ret;
1045 }
1046
1047 static int dvb_net_feed_stop(struct net_device *dev)
1048 {
1049 struct dvb_net_priv *priv = netdev_priv(dev);
1050 int i, ret = 0;
1051
1052 mutex_lock(&priv->mutex);
1053 if (priv->feedtype == DVB_NET_FEEDTYPE_MPE) {
1054 if (priv->secfeed) {
1055 if (priv->secfeed->is_filtering) {
1056 netdev_dbg(dev, "stop secfeed\n");
1057 priv->secfeed->stop_filtering(priv->secfeed);
1058 }
1059
1060 if (priv->secfilter) {
1061 netdev_dbg(dev, "release secfilter\n");
1062 priv->secfeed->release_filter(priv->secfeed,
1063 priv->secfilter);
1064 priv->secfilter=NULL;
1065 }
1066
1067 for (i=0; i<priv->multi_num; i++) {
1068 if (priv->multi_secfilter[i]) {
1069 netdev_dbg(dev, "release multi_filter[%d]\n",
1070 i);
1071 priv->secfeed->release_filter(priv->secfeed,
1072 priv->multi_secfilter[i]);
1073 priv->multi_secfilter[i] = NULL;
1074 }
1075 }
1076
1077 priv->demux->release_section_feed(priv->demux, priv->secfeed);
1078 priv->secfeed = NULL;
1079 } else
1080 pr_err("%s: no feed to stop\n", dev->name);
1081 } else if (priv->feedtype == DVB_NET_FEEDTYPE_ULE) {
1082 if (priv->tsfeed) {
1083 if (priv->tsfeed->is_filtering) {
1084 netdev_dbg(dev, "stop tsfeed\n");
1085 priv->tsfeed->stop_filtering(priv->tsfeed);
1086 }
1087 priv->demux->release_ts_feed(priv->demux, priv->tsfeed);
1088 priv->tsfeed = NULL;
1089 }
1090 else
1091 pr_err("%s: no ts feed to stop\n", dev->name);
1092 } else
1093 ret = -EINVAL;
1094 mutex_unlock(&priv->mutex);
1095 return ret;
1096 }
1097
1098
1099 static int dvb_set_mc_filter(struct net_device *dev, unsigned char *addr)
1100 {
1101 struct dvb_net_priv *priv = netdev_priv(dev);
1102
1103 if (priv->multi_num == DVB_NET_MULTICAST_MAX)
1104 return -ENOMEM;
1105
1106 memcpy(priv->multi_macs[priv->multi_num], addr, ETH_ALEN);
1107
1108 priv->multi_num++;
1109 return 0;
1110 }
1111
1112
1113 static void wq_set_multicast_list (struct work_struct *work)
1114 {
1115 struct dvb_net_priv *priv =
1116 container_of(work, struct dvb_net_priv, set_multicast_list_wq);
1117 struct net_device *dev = priv->net;
1118
1119 dvb_net_feed_stop(dev);
1120 priv->rx_mode = RX_MODE_UNI;
1121 netif_addr_lock_bh(dev);
1122
1123 if (dev->flags & IFF_PROMISC) {
1124 netdev_dbg(dev, "promiscuous mode\n");
1125 priv->rx_mode = RX_MODE_PROMISC;
1126 } else if ((dev->flags & IFF_ALLMULTI)) {
1127 netdev_dbg(dev, "allmulti mode\n");
1128 priv->rx_mode = RX_MODE_ALL_MULTI;
1129 } else if (!netdev_mc_empty(dev)) {
1130 struct netdev_hw_addr *ha;
1131
1132 netdev_dbg(dev, "set_mc_list, %d entries\n",
1133 netdev_mc_count(dev));
1134
1135 priv->rx_mode = RX_MODE_MULTI;
1136 priv->multi_num = 0;
1137
1138 netdev_for_each_mc_addr(ha, dev)
1139 dvb_set_mc_filter(dev, ha->addr);
1140 }
1141
1142 netif_addr_unlock_bh(dev);
1143 dvb_net_feed_start(dev);
1144 }
1145
1146
1147 static void dvb_net_set_multicast_list (struct net_device *dev)
1148 {
1149 struct dvb_net_priv *priv = netdev_priv(dev);
1150 schedule_work(&priv->set_multicast_list_wq);
1151 }
1152
1153
1154 static void wq_restart_net_feed (struct work_struct *work)
1155 {
1156 struct dvb_net_priv *priv =
1157 container_of(work, struct dvb_net_priv, restart_net_feed_wq);
1158 struct net_device *dev = priv->net;
1159
1160 if (netif_running(dev)) {
1161 dvb_net_feed_stop(dev);
1162 dvb_net_feed_start(dev);
1163 }
1164 }
1165
1166
1167 static int dvb_net_set_mac (struct net_device *dev, void *p)
1168 {
1169 struct dvb_net_priv *priv = netdev_priv(dev);
1170 struct sockaddr *addr=p;
1171
1172 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1173
1174 if (netif_running(dev))
1175 schedule_work(&priv->restart_net_feed_wq);
1176
1177 return 0;
1178 }
1179
1180
1181 static int dvb_net_open(struct net_device *dev)
1182 {
1183 struct dvb_net_priv *priv = netdev_priv(dev);
1184
1185 priv->in_use++;
1186 dvb_net_feed_start(dev);
1187 return 0;
1188 }
1189
1190
1191 static int dvb_net_stop(struct net_device *dev)
1192 {
1193 struct dvb_net_priv *priv = netdev_priv(dev);
1194
1195 priv->in_use--;
1196 return dvb_net_feed_stop(dev);
1197 }
1198
1199 static const struct header_ops dvb_header_ops = {
1200 .create = eth_header,
1201 .parse = eth_header_parse,
1202 };
1203
1204
1205 static const struct net_device_ops dvb_netdev_ops = {
1206 .ndo_open = dvb_net_open,
1207 .ndo_stop = dvb_net_stop,
1208 .ndo_start_xmit = dvb_net_tx,
1209 .ndo_set_rx_mode = dvb_net_set_multicast_list,
1210 .ndo_set_mac_address = dvb_net_set_mac,
1211 .ndo_change_mtu = eth_change_mtu,
1212 .ndo_validate_addr = eth_validate_addr,
1213 };
1214
1215 static void dvb_net_setup(struct net_device *dev)
1216 {
1217 ether_setup(dev);
1218
1219 dev->header_ops = &dvb_header_ops;
1220 dev->netdev_ops = &dvb_netdev_ops;
1221 dev->mtu = 4096;
1222
1223 dev->flags |= IFF_NOARP;
1224 }
1225
1226 static int get_if(struct dvb_net *dvbnet)
1227 {
1228 int i;
1229
1230 for (i=0; i<DVB_NET_DEVICES_MAX; i++)
1231 if (!dvbnet->state[i])
1232 break;
1233
1234 if (i == DVB_NET_DEVICES_MAX)
1235 return -1;
1236
1237 dvbnet->state[i]=1;
1238 return i;
1239 }
1240
1241 static int dvb_net_add_if(struct dvb_net *dvbnet, u16 pid, u8 feedtype)
1242 {
1243 struct net_device *net;
1244 struct dvb_net_priv *priv;
1245 int result;
1246 int if_num;
1247
1248 if (feedtype != DVB_NET_FEEDTYPE_MPE && feedtype != DVB_NET_FEEDTYPE_ULE)
1249 return -EINVAL;
1250 if ((if_num = get_if(dvbnet)) < 0)
1251 return -EINVAL;
1252
1253 net = alloc_netdev(sizeof(struct dvb_net_priv), "dvb",
1254 NET_NAME_UNKNOWN, dvb_net_setup);
1255 if (!net)
1256 return -ENOMEM;
1257
1258 if (dvbnet->dvbdev->id)
1259 snprintf(net->name, IFNAMSIZ, "dvb%d%u%d",
1260 dvbnet->dvbdev->adapter->num, dvbnet->dvbdev->id, if_num);
1261 else
1262 /* compatibility fix to keep dvb0_0 format */
1263 snprintf(net->name, IFNAMSIZ, "dvb%d_%d",
1264 dvbnet->dvbdev->adapter->num, if_num);
1265
1266 net->addr_len = 6;
1267 memcpy(net->dev_addr, dvbnet->dvbdev->adapter->proposed_mac, 6);
1268
1269 dvbnet->device[if_num] = net;
1270
1271 priv = netdev_priv(net);
1272 priv->net = net;
1273 priv->demux = dvbnet->demux;
1274 priv->pid = pid;
1275 priv->rx_mode = RX_MODE_UNI;
1276 priv->need_pusi = 1;
1277 priv->tscc = 0;
1278 priv->feedtype = feedtype;
1279 reset_ule(priv);
1280
1281 INIT_WORK(&priv->set_multicast_list_wq, wq_set_multicast_list);
1282 INIT_WORK(&priv->restart_net_feed_wq, wq_restart_net_feed);
1283 mutex_init(&priv->mutex);
1284
1285 net->base_addr = pid;
1286
1287 if ((result = register_netdev(net)) < 0) {
1288 dvbnet->device[if_num] = NULL;
1289 free_netdev(net);
1290 return result;
1291 }
1292 pr_info("created network interface %s\n", net->name);
1293
1294 return if_num;
1295 }
1296
1297 static int dvb_net_remove_if(struct dvb_net *dvbnet, unsigned long num)
1298 {
1299 struct net_device *net = dvbnet->device[num];
1300 struct dvb_net_priv *priv;
1301
1302 if (!dvbnet->state[num])
1303 return -EINVAL;
1304 priv = netdev_priv(net);
1305 if (priv->in_use)
1306 return -EBUSY;
1307
1308 dvb_net_stop(net);
1309 flush_work(&priv->set_multicast_list_wq);
1310 flush_work(&priv->restart_net_feed_wq);
1311 pr_info("removed network interface %s\n", net->name);
1312 unregister_netdev(net);
1313 dvbnet->state[num]=0;
1314 dvbnet->device[num] = NULL;
1315 free_netdev(net);
1316
1317 return 0;
1318 }
1319
1320 static int dvb_net_do_ioctl(struct file *file,
1321 unsigned int cmd, void *parg)
1322 {
1323 struct dvb_device *dvbdev = file->private_data;
1324 struct dvb_net *dvbnet = dvbdev->priv;
1325 int ret = 0;
1326
1327 if (((file->f_flags&O_ACCMODE)==O_RDONLY))
1328 return -EPERM;
1329
1330 if (mutex_lock_interruptible(&dvbnet->ioctl_mutex))
1331 return -ERESTARTSYS;
1332
1333 switch (cmd) {
1334 case NET_ADD_IF:
1335 {
1336 struct dvb_net_if *dvbnetif = parg;
1337 int result;
1338
1339 if (!capable(CAP_SYS_ADMIN)) {
1340 ret = -EPERM;
1341 goto ioctl_error;
1342 }
1343
1344 if (!try_module_get(dvbdev->adapter->module)) {
1345 ret = -EPERM;
1346 goto ioctl_error;
1347 }
1348
1349 result=dvb_net_add_if(dvbnet, dvbnetif->pid, dvbnetif->feedtype);
1350 if (result<0) {
1351 module_put(dvbdev->adapter->module);
1352 ret = result;
1353 goto ioctl_error;
1354 }
1355 dvbnetif->if_num=result;
1356 break;
1357 }
1358 case NET_GET_IF:
1359 {
1360 struct net_device *netdev;
1361 struct dvb_net_priv *priv_data;
1362 struct dvb_net_if *dvbnetif = parg;
1363
1364 if (dvbnetif->if_num >= DVB_NET_DEVICES_MAX ||
1365 !dvbnet->state[dvbnetif->if_num]) {
1366 ret = -EINVAL;
1367 goto ioctl_error;
1368 }
1369
1370 netdev = dvbnet->device[dvbnetif->if_num];
1371
1372 priv_data = netdev_priv(netdev);
1373 dvbnetif->pid=priv_data->pid;
1374 dvbnetif->feedtype=priv_data->feedtype;
1375 break;
1376 }
1377 case NET_REMOVE_IF:
1378 {
1379 if (!capable(CAP_SYS_ADMIN)) {
1380 ret = -EPERM;
1381 goto ioctl_error;
1382 }
1383 if ((unsigned long) parg >= DVB_NET_DEVICES_MAX) {
1384 ret = -EINVAL;
1385 goto ioctl_error;
1386 }
1387 ret = dvb_net_remove_if(dvbnet, (unsigned long) parg);
1388 if (!ret)
1389 module_put(dvbdev->adapter->module);
1390 break;
1391 }
1392
1393 /* binary compatibility cruft */
1394 case __NET_ADD_IF_OLD:
1395 {
1396 struct __dvb_net_if_old *dvbnetif = parg;
1397 int result;
1398
1399 if (!capable(CAP_SYS_ADMIN)) {
1400 ret = -EPERM;
1401 goto ioctl_error;
1402 }
1403
1404 if (!try_module_get(dvbdev->adapter->module)) {
1405 ret = -EPERM;
1406 goto ioctl_error;
1407 }
1408
1409 result=dvb_net_add_if(dvbnet, dvbnetif->pid, DVB_NET_FEEDTYPE_MPE);
1410 if (result<0) {
1411 module_put(dvbdev->adapter->module);
1412 ret = result;
1413 goto ioctl_error;
1414 }
1415 dvbnetif->if_num=result;
1416 break;
1417 }
1418 case __NET_GET_IF_OLD:
1419 {
1420 struct net_device *netdev;
1421 struct dvb_net_priv *priv_data;
1422 struct __dvb_net_if_old *dvbnetif = parg;
1423
1424 if (dvbnetif->if_num >= DVB_NET_DEVICES_MAX ||
1425 !dvbnet->state[dvbnetif->if_num]) {
1426 ret = -EINVAL;
1427 goto ioctl_error;
1428 }
1429
1430 netdev = dvbnet->device[dvbnetif->if_num];
1431
1432 priv_data = netdev_priv(netdev);
1433 dvbnetif->pid=priv_data->pid;
1434 break;
1435 }
1436 default:
1437 ret = -ENOTTY;
1438 break;
1439 }
1440
1441 ioctl_error:
1442 mutex_unlock(&dvbnet->ioctl_mutex);
1443 return ret;
1444 }
1445
1446 static long dvb_net_ioctl(struct file *file,
1447 unsigned int cmd, unsigned long arg)
1448 {
1449 return dvb_usercopy(file, cmd, arg, dvb_net_do_ioctl);
1450 }
1451
1452 static int dvb_net_close(struct inode *inode, struct file *file)
1453 {
1454 struct dvb_device *dvbdev = file->private_data;
1455 struct dvb_net *dvbnet = dvbdev->priv;
1456
1457 dvb_generic_release(inode, file);
1458
1459 if(dvbdev->users == 1 && dvbnet->exit == 1)
1460 wake_up(&dvbdev->wait_queue);
1461 return 0;
1462 }
1463
1464
1465 static const struct file_operations dvb_net_fops = {
1466 .owner = THIS_MODULE,
1467 .unlocked_ioctl = dvb_net_ioctl,
1468 .open = dvb_generic_open,
1469 .release = dvb_net_close,
1470 .llseek = noop_llseek,
1471 };
1472
1473 static const struct dvb_device dvbdev_net = {
1474 .priv = NULL,
1475 .users = 1,
1476 .writers = 1,
1477 #if defined(CONFIG_MEDIA_CONTROLLER_DVB)
1478 .name = "dvb-net",
1479 #endif
1480 .fops = &dvb_net_fops,
1481 };
1482
1483 void dvb_net_release (struct dvb_net *dvbnet)
1484 {
1485 int i;
1486
1487 dvbnet->exit = 1;
1488 if (dvbnet->dvbdev->users < 1)
1489 wait_event(dvbnet->dvbdev->wait_queue,
1490 dvbnet->dvbdev->users==1);
1491
1492 dvb_unregister_device(dvbnet->dvbdev);
1493
1494 for (i=0; i<DVB_NET_DEVICES_MAX; i++) {
1495 if (!dvbnet->state[i])
1496 continue;
1497 dvb_net_remove_if(dvbnet, i);
1498 }
1499 }
1500 EXPORT_SYMBOL(dvb_net_release);
1501
1502
1503 int dvb_net_init (struct dvb_adapter *adap, struct dvb_net *dvbnet,
1504 struct dmx_demux *dmx)
1505 {
1506 int i;
1507
1508 mutex_init(&dvbnet->ioctl_mutex);
1509 dvbnet->demux = dmx;
1510
1511 for (i=0; i<DVB_NET_DEVICES_MAX; i++)
1512 dvbnet->state[i] = 0;
1513
1514 return dvb_register_device(adap, &dvbnet->dvbdev, &dvbdev_net,
1515 dvbnet, DVB_DEVICE_NET, 0);
1516 }
1517 EXPORT_SYMBOL(dvb_net_init);
Ubuntu Artful kernel mirror