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workqueue: deprecate flush[_delayed]_work_sync()
[deliverable/linux.git] / drivers / media / dvb / 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 #include <linux/module.h>
58 #include <linux/kernel.h>
59 #include <linux/netdevice.h>
60 #include <linux/etherdevice.h>
61 #include <linux/dvb/net.h>
62 #include <linux/uio.h>
63 #include <asm/uaccess.h>
64 #include <linux/crc32.h>
65 #include <linux/mutex.h>
66 #include <linux/sched.h>
67
68 #include "dvb_demux.h"
69 #include "dvb_net.h"
70
71 static int dvb_net_debug;
72 module_param(dvb_net_debug, int, 0444);
73 MODULE_PARM_DESC(dvb_net_debug, "enable debug messages");
74
75 #define dprintk(x...) do { if (dvb_net_debug) printk(x); } while (0)
76
77
78 static inline __u32 iov_crc32( __u32 c, struct kvec *iov, unsigned int cnt )
79 {
80 unsigned int j;
81 for (j = 0; j < cnt; j++)
82 c = crc32_be( c, iov[j].iov_base, iov[j].iov_len );
83 return c;
84 }
85
86
87 #define DVB_NET_MULTICAST_MAX 10
88
89 #undef ULE_DEBUG
90
91 #ifdef ULE_DEBUG
92
93 #define MAC_ADDR_PRINTFMT "%.2x:%.2x:%.2x:%.2x:%.2x:%.2x"
94 #define MAX_ADDR_PRINTFMT_ARGS(macap) (macap)[0],(macap)[1],(macap)[2],(macap)[3],(macap)[4],(macap)[5]
95
96 #define isprint(c) ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || (c >= '0' && c <= '9'))
97
98 static void hexdump( const unsigned char *buf, unsigned short len )
99 {
100 char str[80], octet[10];
101 int ofs, i, l;
102
103 for (ofs = 0; ofs < len; ofs += 16) {
104 sprintf( str, "%03d: ", ofs );
105
106 for (i = 0; i < 16; i++) {
107 if ((i + ofs) < len)
108 sprintf( octet, "%02x ", buf[ofs + i] );
109 else
110 strcpy( octet, " " );
111
112 strcat( str, octet );
113 }
114 strcat( str, " " );
115 l = strlen( str );
116
117 for (i = 0; (i < 16) && ((i + ofs) < len); i++)
118 str[l++] = isprint( buf[ofs + i] ) ? buf[ofs + i] : '.';
119
120 str[l] = '\0';
121 printk( KERN_WARNING "%s\n", str );
122 }
123 }
124
125 #endif
126
127 struct dvb_net_priv {
128 int in_use;
129 u16 pid;
130 struct net_device *net;
131 struct dvb_net *host;
132 struct dmx_demux *demux;
133 struct dmx_section_feed *secfeed;
134 struct dmx_section_filter *secfilter;
135 struct dmx_ts_feed *tsfeed;
136 int multi_num;
137 struct dmx_section_filter *multi_secfilter[DVB_NET_MULTICAST_MAX];
138 unsigned char multi_macs[DVB_NET_MULTICAST_MAX][6];
139 int rx_mode;
140 #define RX_MODE_UNI 0
141 #define RX_MODE_MULTI 1
142 #define RX_MODE_ALL_MULTI 2
143 #define RX_MODE_PROMISC 3
144 struct work_struct set_multicast_list_wq;
145 struct work_struct restart_net_feed_wq;
146 unsigned char feedtype; /* Either FEED_TYPE_ or FEED_TYPE_ULE */
147 int need_pusi; /* Set to 1, if synchronization on PUSI required. */
148 unsigned char tscc; /* TS continuity counter after sync on PUSI. */
149 struct sk_buff *ule_skb; /* ULE SNDU decodes into this buffer. */
150 unsigned char *ule_next_hdr; /* Pointer into skb to next ULE extension header. */
151 unsigned short ule_sndu_len; /* ULE SNDU length in bytes, w/o D-Bit. */
152 unsigned short ule_sndu_type; /* ULE SNDU type field, complete. */
153 unsigned char ule_sndu_type_1; /* ULE SNDU type field, if split across 2 TS cells. */
154 unsigned char ule_dbit; /* Whether the DestMAC address present
155 * or not (bit is set). */
156 unsigned char ule_bridged; /* Whether the ULE_BRIDGED extension header was found. */
157 int ule_sndu_remain; /* Nr. of bytes still required for current ULE SNDU. */
158 unsigned long ts_count; /* Current ts cell counter. */
159 struct mutex mutex;
160 };
161
162
163 /**
164 * Determine the packet's protocol ID. The rule here is that we
165 * assume 802.3 if the type field is short enough to be a length.
166 * This is normal practice and works for any 'now in use' protocol.
167 *
168 * stolen from eth.c out of the linux kernel, hacked for dvb-device
169 * by Michael Holzt <kju@debian.org>
170 */
171 static __be16 dvb_net_eth_type_trans(struct sk_buff *skb,
172 struct net_device *dev)
173 {
174 struct ethhdr *eth;
175 unsigned char *rawp;
176
177 skb_reset_mac_header(skb);
178 skb_pull(skb,dev->hard_header_len);
179 eth = eth_hdr(skb);
180
181 if (*eth->h_dest & 1) {
182 if(memcmp(eth->h_dest,dev->broadcast, ETH_ALEN)==0)
183 skb->pkt_type=PACKET_BROADCAST;
184 else
185 skb->pkt_type=PACKET_MULTICAST;
186 }
187
188 if (ntohs(eth->h_proto) >= 1536)
189 return eth->h_proto;
190
191 rawp = skb->data;
192
193 /**
194 * This is a magic hack to spot IPX packets. Older Novell breaks
195 * the protocol design and runs IPX over 802.3 without an 802.2 LLC
196 * layer. We look for FFFF which isn't a used 802.2 SSAP/DSAP. This
197 * won't work for fault tolerant netware but does for the rest.
198 */
199 if (*(unsigned short *)rawp == 0xFFFF)
200 return htons(ETH_P_802_3);
201
202 /**
203 * Real 802.2 LLC
204 */
205 return htons(ETH_P_802_2);
206 }
207
208 #define TS_SZ 188
209 #define TS_SYNC 0x47
210 #define TS_TEI 0x80
211 #define TS_SC 0xC0
212 #define TS_PUSI 0x40
213 #define TS_AF_A 0x20
214 #define TS_AF_D 0x10
215
216 /* ULE Extension Header handlers. */
217
218 #define ULE_TEST 0
219 #define ULE_BRIDGED 1
220
221 #define ULE_OPTEXTHDR_PADDING 0
222
223 static int ule_test_sndu( struct dvb_net_priv *p )
224 {
225 return -1;
226 }
227
228 static int ule_bridged_sndu( struct dvb_net_priv *p )
229 {
230 struct ethhdr *hdr = (struct ethhdr*) p->ule_next_hdr;
231 if(ntohs(hdr->h_proto) < 1536) {
232 int framelen = p->ule_sndu_len - ((p->ule_next_hdr+sizeof(struct ethhdr)) - p->ule_skb->data);
233 /* A frame Type < 1536 for a bridged frame, introduces a LLC Length field. */
234 if(framelen != ntohs(hdr->h_proto)) {
235 return -1;
236 }
237 }
238 /* Note:
239 * From RFC4326:
240 * "A bridged SNDU is a Mandatory Extension Header of Type 1.
241 * It must be the final (or only) extension header specified in the header chain of a SNDU."
242 * The 'ule_bridged' flag will cause the extension header processing loop to terminate.
243 */
244 p->ule_bridged = 1;
245 return 0;
246 }
247
248 static int ule_exthdr_padding(struct dvb_net_priv *p)
249 {
250 return 0;
251 }
252
253 /** Handle ULE extension headers.
254 * Function is called after a successful CRC32 verification of an ULE SNDU to complete its decoding.
255 * Returns: >= 0: nr. of bytes consumed by next extension header
256 * -1: Mandatory extension header that is not recognized or TEST SNDU; discard.
257 */
258 static int handle_one_ule_extension( struct dvb_net_priv *p )
259 {
260 /* Table of mandatory extension header handlers. The header type is the index. */
261 static int (*ule_mandatory_ext_handlers[255])( struct dvb_net_priv *p ) =
262 { [0] = ule_test_sndu, [1] = ule_bridged_sndu, [2] = NULL, };
263
264 /* Table of optional extension header handlers. The header type is the index. */
265 static int (*ule_optional_ext_handlers[255])( struct dvb_net_priv *p ) =
266 { [0] = ule_exthdr_padding, [1] = NULL, };
267
268 int ext_len = 0;
269 unsigned char hlen = (p->ule_sndu_type & 0x0700) >> 8;
270 unsigned char htype = p->ule_sndu_type & 0x00FF;
271
272 /* Discriminate mandatory and optional extension headers. */
273 if (hlen == 0) {
274 /* Mandatory extension header */
275 if (ule_mandatory_ext_handlers[htype]) {
276 ext_len = ule_mandatory_ext_handlers[htype]( p );
277 if(ext_len >= 0) {
278 p->ule_next_hdr += ext_len;
279 if (!p->ule_bridged) {
280 p->ule_sndu_type = ntohs(*(__be16 *)p->ule_next_hdr);
281 p->ule_next_hdr += 2;
282 } else {
283 p->ule_sndu_type = ntohs(*(__be16 *)(p->ule_next_hdr + ((p->ule_dbit ? 2 : 3) * ETH_ALEN)));
284 /* This assures the extension handling loop will terminate. */
285 }
286 }
287 // else: extension handler failed or SNDU should be discarded
288 } else
289 ext_len = -1; /* SNDU has to be discarded. */
290 } else {
291 /* Optional extension header. Calculate the length. */
292 ext_len = hlen << 1;
293 /* Process the optional extension header according to its type. */
294 if (ule_optional_ext_handlers[htype])
295 (void)ule_optional_ext_handlers[htype]( p );
296 p->ule_next_hdr += ext_len;
297 p->ule_sndu_type = ntohs( *(__be16 *)(p->ule_next_hdr-2) );
298 /*
299 * note: the length of the next header type is included in the
300 * length of THIS optional extension header
301 */
302 }
303
304 return ext_len;
305 }
306
307 static int handle_ule_extensions( struct dvb_net_priv *p )
308 {
309 int total_ext_len = 0, l;
310
311 p->ule_next_hdr = p->ule_skb->data;
312 do {
313 l = handle_one_ule_extension( p );
314 if (l < 0)
315 return l; /* Stop extension header processing and discard SNDU. */
316 total_ext_len += l;
317 #ifdef ULE_DEBUG
318 dprintk("handle_ule_extensions: ule_next_hdr=%p, ule_sndu_type=%i, "
319 "l=%i, total_ext_len=%i\n", p->ule_next_hdr,
320 (int) p->ule_sndu_type, l, total_ext_len);
321 #endif
322
323 } while (p->ule_sndu_type < 1536);
324
325 return total_ext_len;
326 }
327
328
329 /** Prepare for a new ULE SNDU: reset the decoder state. */
330 static inline void reset_ule( struct dvb_net_priv *p )
331 {
332 p->ule_skb = NULL;
333 p->ule_next_hdr = NULL;
334 p->ule_sndu_len = 0;
335 p->ule_sndu_type = 0;
336 p->ule_sndu_type_1 = 0;
337 p->ule_sndu_remain = 0;
338 p->ule_dbit = 0xFF;
339 p->ule_bridged = 0;
340 }
341
342 /**
343 * Decode ULE SNDUs according to draft-ietf-ipdvb-ule-03.txt from a sequence of
344 * TS cells of a single PID.
345 */
346 static void dvb_net_ule( struct net_device *dev, const u8 *buf, size_t buf_len )
347 {
348 struct dvb_net_priv *priv = netdev_priv(dev);
349 unsigned long skipped = 0L;
350 const u8 *ts, *ts_end, *from_where = NULL;
351 u8 ts_remain = 0, how_much = 0, new_ts = 1;
352 struct ethhdr *ethh = NULL;
353 bool error = false;
354
355 #ifdef ULE_DEBUG
356 /* The code inside ULE_DEBUG keeps a history of the last 100 TS cells processed. */
357 static unsigned char ule_hist[100*TS_SZ];
358 static unsigned char *ule_where = ule_hist, ule_dump;
359 #endif
360
361 /* For all TS cells in current buffer.
362 * Appearently, we are called for every single TS cell.
363 */
364 for (ts = buf, ts_end = buf + buf_len; ts < ts_end; /* no default incr. */ ) {
365
366 if (new_ts) {
367 /* We are about to process a new TS cell. */
368
369 #ifdef ULE_DEBUG
370 if (ule_where >= &ule_hist[100*TS_SZ]) ule_where = ule_hist;
371 memcpy( ule_where, ts, TS_SZ );
372 if (ule_dump) {
373 hexdump( ule_where, TS_SZ );
374 ule_dump = 0;
375 }
376 ule_where += TS_SZ;
377 #endif
378
379 /* Check TS error conditions: sync_byte, transport_error_indicator, scrambling_control . */
380 if ((ts[0] != TS_SYNC) || (ts[1] & TS_TEI) || ((ts[3] & TS_SC) != 0)) {
381 printk(KERN_WARNING "%lu: Invalid TS cell: SYNC %#x, TEI %u, SC %#x.\n",
382 priv->ts_count, ts[0], ts[1] & TS_TEI >> 7, ts[3] & 0xC0 >> 6);
383
384 /* Drop partly decoded SNDU, reset state, resync on PUSI. */
385 if (priv->ule_skb) {
386 dev_kfree_skb( priv->ule_skb );
387 /* Prepare for next SNDU. */
388 dev->stats.rx_errors++;
389 dev->stats.rx_frame_errors++;
390 }
391 reset_ule(priv);
392 priv->need_pusi = 1;
393
394 /* Continue with next TS cell. */
395 ts += TS_SZ;
396 priv->ts_count++;
397 continue;
398 }
399
400 ts_remain = 184;
401 from_where = ts + 4;
402 }
403 /* Synchronize on PUSI, if required. */
404 if (priv->need_pusi) {
405 if (ts[1] & TS_PUSI) {
406 /* Find beginning of first ULE SNDU in current TS cell. */
407 /* Synchronize continuity counter. */
408 priv->tscc = ts[3] & 0x0F;
409 /* There is a pointer field here. */
410 if (ts[4] > ts_remain) {
411 printk(KERN_ERR "%lu: Invalid ULE packet "
412 "(pointer field %d)\n", priv->ts_count, ts[4]);
413 ts += TS_SZ;
414 priv->ts_count++;
415 continue;
416 }
417 /* Skip to destination of pointer field. */
418 from_where = &ts[5] + ts[4];
419 ts_remain -= 1 + ts[4];
420 skipped = 0;
421 } else {
422 skipped++;
423 ts += TS_SZ;
424 priv->ts_count++;
425 continue;
426 }
427 }
428
429 if (new_ts) {
430 /* Check continuity counter. */
431 if ((ts[3] & 0x0F) == priv->tscc)
432 priv->tscc = (priv->tscc + 1) & 0x0F;
433 else {
434 /* TS discontinuity handling: */
435 printk(KERN_WARNING "%lu: TS discontinuity: got %#x, "
436 "expected %#x.\n", priv->ts_count, ts[3] & 0x0F, priv->tscc);
437 /* Drop partly decoded SNDU, reset state, resync on PUSI. */
438 if (priv->ule_skb) {
439 dev_kfree_skb( priv->ule_skb );
440 /* Prepare for next SNDU. */
441 // reset_ule(priv); moved to below.
442 dev->stats.rx_errors++;
443 dev->stats.rx_frame_errors++;
444 }
445 reset_ule(priv);
446 /* skip to next PUSI. */
447 priv->need_pusi = 1;
448 continue;
449 }
450 /* If we still have an incomplete payload, but PUSI is
451 * set; some TS cells are missing.
452 * This is only possible here, if we missed exactly 16 TS
453 * cells (continuity counter wrap). */
454 if (ts[1] & TS_PUSI) {
455 if (! priv->need_pusi) {
456 if (!(*from_where < (ts_remain-1)) || *from_where != priv->ule_sndu_remain) {
457 /* Pointer field is invalid. Drop this TS cell and any started ULE SNDU. */
458 printk(KERN_WARNING "%lu: Invalid pointer "
459 "field: %u.\n", priv->ts_count, *from_where);
460
461 /* Drop partly decoded SNDU, reset state, resync on PUSI. */
462 if (priv->ule_skb) {
463 error = true;
464 dev_kfree_skb(priv->ule_skb);
465 }
466
467 if (error || priv->ule_sndu_remain) {
468 dev->stats.rx_errors++;
469 dev->stats.rx_frame_errors++;
470 error = false;
471 }
472
473 reset_ule(priv);
474 priv->need_pusi = 1;
475 continue;
476 }
477 /* Skip pointer field (we're processing a
478 * packed payload). */
479 from_where += 1;
480 ts_remain -= 1;
481 } else
482 priv->need_pusi = 0;
483
484 if (priv->ule_sndu_remain > 183) {
485 /* Current SNDU lacks more data than there could be available in the
486 * current TS cell. */
487 dev->stats.rx_errors++;
488 dev->stats.rx_length_errors++;
489 printk(KERN_WARNING "%lu: Expected %d more SNDU bytes, but "
490 "got PUSI (pf %d, ts_remain %d). Flushing incomplete payload.\n",
491 priv->ts_count, priv->ule_sndu_remain, ts[4], ts_remain);
492 dev_kfree_skb(priv->ule_skb);
493 /* Prepare for next SNDU. */
494 reset_ule(priv);
495 /* Resync: go to where pointer field points to: start of next ULE SNDU. */
496 from_where += ts[4];
497 ts_remain -= ts[4];
498 }
499 }
500 }
501
502 /* Check if new payload needs to be started. */
503 if (priv->ule_skb == NULL) {
504 /* Start a new payload with skb.
505 * Find ULE header. It is only guaranteed that the
506 * length field (2 bytes) is contained in the current
507 * TS.
508 * Check ts_remain has to be >= 2 here. */
509 if (ts_remain < 2) {
510 printk(KERN_WARNING "Invalid payload packing: only %d "
511 "bytes left in TS. Resyncing.\n", ts_remain);
512 priv->ule_sndu_len = 0;
513 priv->need_pusi = 1;
514 ts += TS_SZ;
515 continue;
516 }
517
518 if (! priv->ule_sndu_len) {
519 /* Got at least two bytes, thus extrace the SNDU length. */
520 priv->ule_sndu_len = from_where[0] << 8 | from_where[1];
521 if (priv->ule_sndu_len & 0x8000) {
522 /* D-Bit is set: no dest mac present. */
523 priv->ule_sndu_len &= 0x7FFF;
524 priv->ule_dbit = 1;
525 } else
526 priv->ule_dbit = 0;
527
528 if (priv->ule_sndu_len < 5) {
529 printk(KERN_WARNING "%lu: Invalid ULE SNDU length %u. "
530 "Resyncing.\n", priv->ts_count, priv->ule_sndu_len);
531 dev->stats.rx_errors++;
532 dev->stats.rx_length_errors++;
533 priv->ule_sndu_len = 0;
534 priv->need_pusi = 1;
535 new_ts = 1;
536 ts += TS_SZ;
537 priv->ts_count++;
538 continue;
539 }
540 ts_remain -= 2; /* consume the 2 bytes SNDU length. */
541 from_where += 2;
542 }
543
544 priv->ule_sndu_remain = priv->ule_sndu_len + 2;
545 /*
546 * State of current TS:
547 * ts_remain (remaining bytes in the current TS cell)
548 * 0 ule_type is not available now, we need the next TS cell
549 * 1 the first byte of the ule_type is present
550 * >=2 full ULE header present, maybe some payload data as well.
551 */
552 switch (ts_remain) {
553 case 1:
554 priv->ule_sndu_remain--;
555 priv->ule_sndu_type = from_where[0] << 8;
556 priv->ule_sndu_type_1 = 1; /* first byte of ule_type is set. */
557 ts_remain -= 1; from_where += 1;
558 /* Continue w/ next TS. */
559 case 0:
560 new_ts = 1;
561 ts += TS_SZ;
562 priv->ts_count++;
563 continue;
564
565 default: /* complete ULE header is present in current TS. */
566 /* Extract ULE type field. */
567 if (priv->ule_sndu_type_1) {
568 priv->ule_sndu_type_1 = 0;
569 priv->ule_sndu_type |= from_where[0];
570 from_where += 1; /* points to payload start. */
571 ts_remain -= 1;
572 } else {
573 /* Complete type is present in new TS. */
574 priv->ule_sndu_type = from_where[0] << 8 | from_where[1];
575 from_where += 2; /* points to payload start. */
576 ts_remain -= 2;
577 }
578 break;
579 }
580
581 /* Allocate the skb (decoder target buffer) with the correct size, as follows:
582 * prepare for the largest case: bridged SNDU with MAC address (dbit = 0). */
583 priv->ule_skb = dev_alloc_skb( priv->ule_sndu_len + ETH_HLEN + ETH_ALEN );
584 if (priv->ule_skb == NULL) {
585 printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n",
586 dev->name);
587 dev->stats.rx_dropped++;
588 return;
589 }
590
591 /* This includes the CRC32 _and_ dest mac, if !dbit. */
592 priv->ule_sndu_remain = priv->ule_sndu_len;
593 priv->ule_skb->dev = dev;
594 /* Leave space for Ethernet or bridged SNDU header (eth hdr plus one MAC addr). */
595 skb_reserve( priv->ule_skb, ETH_HLEN + ETH_ALEN );
596 }
597
598 /* Copy data into our current skb. */
599 how_much = min(priv->ule_sndu_remain, (int)ts_remain);
600 memcpy(skb_put(priv->ule_skb, how_much), from_where, how_much);
601 priv->ule_sndu_remain -= how_much;
602 ts_remain -= how_much;
603 from_where += how_much;
604
605 /* Check for complete payload. */
606 if (priv->ule_sndu_remain <= 0) {
607 /* Check CRC32, we've got it in our skb already. */
608 __be16 ulen = htons(priv->ule_sndu_len);
609 __be16 utype = htons(priv->ule_sndu_type);
610 const u8 *tail;
611 struct kvec iov[3] = {
612 { &ulen, sizeof ulen },
613 { &utype, sizeof utype },
614 { priv->ule_skb->data, priv->ule_skb->len - 4 }
615 };
616 u32 ule_crc = ~0L, expected_crc;
617 if (priv->ule_dbit) {
618 /* Set D-bit for CRC32 verification,
619 * if it was set originally. */
620 ulen |= htons(0x8000);
621 }
622
623 ule_crc = iov_crc32(ule_crc, iov, 3);
624 tail = skb_tail_pointer(priv->ule_skb);
625 expected_crc = *(tail - 4) << 24 |
626 *(tail - 3) << 16 |
627 *(tail - 2) << 8 |
628 *(tail - 1);
629 if (ule_crc != expected_crc) {
630 printk(KERN_WARNING "%lu: CRC32 check FAILED: %08x / %08x, SNDU len %d type %#x, ts_remain %d, next 2: %x.\n",
631 priv->ts_count, ule_crc, expected_crc, priv->ule_sndu_len, priv->ule_sndu_type, ts_remain, ts_remain > 2 ? *(unsigned short *)from_where : 0);
632
633 #ifdef ULE_DEBUG
634 hexdump( iov[0].iov_base, iov[0].iov_len );
635 hexdump( iov[1].iov_base, iov[1].iov_len );
636 hexdump( iov[2].iov_base, iov[2].iov_len );
637
638 if (ule_where == ule_hist) {
639 hexdump( &ule_hist[98*TS_SZ], TS_SZ );
640 hexdump( &ule_hist[99*TS_SZ], TS_SZ );
641 } else if (ule_where == &ule_hist[TS_SZ]) {
642 hexdump( &ule_hist[99*TS_SZ], TS_SZ );
643 hexdump( ule_hist, TS_SZ );
644 } else {
645 hexdump( ule_where - TS_SZ - TS_SZ, TS_SZ );
646 hexdump( ule_where - TS_SZ, TS_SZ );
647 }
648 ule_dump = 1;
649 #endif
650
651 dev->stats.rx_errors++;
652 dev->stats.rx_crc_errors++;
653 dev_kfree_skb(priv->ule_skb);
654 } else {
655 /* CRC32 verified OK. */
656 u8 dest_addr[ETH_ALEN];
657 static const u8 bc_addr[ETH_ALEN] =
658 { [ 0 ... ETH_ALEN-1] = 0xff };
659
660 /* CRC32 was OK. Remove it from skb. */
661 priv->ule_skb->tail -= 4;
662 priv->ule_skb->len -= 4;
663
664 if (!priv->ule_dbit) {
665 /*
666 * The destination MAC address is the
667 * next data in the skb. It comes
668 * before any extension headers.
669 *
670 * Check if the payload of this SNDU
671 * should be passed up the stack.
672 */
673 register int drop = 0;
674 if (priv->rx_mode != RX_MODE_PROMISC) {
675 if (priv->ule_skb->data[0] & 0x01) {
676 /* multicast or broadcast */
677 if (memcmp(priv->ule_skb->data, bc_addr, ETH_ALEN)) {
678 /* multicast */
679 if (priv->rx_mode == RX_MODE_MULTI) {
680 int i;
681 for(i = 0; i < priv->multi_num && memcmp(priv->ule_skb->data, priv->multi_macs[i], ETH_ALEN); i++)
682 ;
683 if (i == priv->multi_num)
684 drop = 1;
685 } else if (priv->rx_mode != RX_MODE_ALL_MULTI)
686 drop = 1; /* no broadcast; */
687 /* else: all multicast mode: accept all multicast packets */
688 }
689 /* else: broadcast */
690 }
691 else if (memcmp(priv->ule_skb->data, dev->dev_addr, ETH_ALEN))
692 drop = 1;
693 /* else: destination address matches the MAC address of our receiver device */
694 }
695 /* else: promiscuous mode; pass everything up the stack */
696
697 if (drop) {
698 #ifdef ULE_DEBUG
699 dprintk("Dropping SNDU: MAC destination address does not match: dest addr: "MAC_ADDR_PRINTFMT", dev addr: "MAC_ADDR_PRINTFMT"\n",
700 MAX_ADDR_PRINTFMT_ARGS(priv->ule_skb->data), MAX_ADDR_PRINTFMT_ARGS(dev->dev_addr));
701 #endif
702 dev_kfree_skb(priv->ule_skb);
703 goto sndu_done;
704 }
705 else
706 {
707 skb_copy_from_linear_data(priv->ule_skb,
708 dest_addr,
709 ETH_ALEN);
710 skb_pull(priv->ule_skb, ETH_ALEN);
711 }
712 }
713
714 /* Handle ULE Extension Headers. */
715 if (priv->ule_sndu_type < 1536) {
716 /* There is an extension header. Handle it accordingly. */
717 int l = handle_ule_extensions(priv);
718 if (l < 0) {
719 /* Mandatory extension header unknown or TEST SNDU. Drop it. */
720 // printk( KERN_WARNING "Dropping SNDU, extension headers.\n" );
721 dev_kfree_skb(priv->ule_skb);
722 goto sndu_done;
723 }
724 skb_pull(priv->ule_skb, l);
725 }
726
727 /*
728 * Construct/assure correct ethernet header.
729 * Note: in bridged mode (priv->ule_bridged !=
730 * 0) we already have the (original) ethernet
731 * header at the start of the payload (after
732 * optional dest. address and any extension
733 * headers).
734 */
735
736 if (!priv->ule_bridged) {
737 skb_push(priv->ule_skb, ETH_HLEN);
738 ethh = (struct ethhdr *)priv->ule_skb->data;
739 if (!priv->ule_dbit) {
740 /* dest_addr buffer is only valid if priv->ule_dbit == 0 */
741 memcpy(ethh->h_dest, dest_addr, ETH_ALEN);
742 memset(ethh->h_source, 0, ETH_ALEN);
743 }
744 else /* zeroize source and dest */
745 memset( ethh, 0, ETH_ALEN*2 );
746
747 ethh->h_proto = htons(priv->ule_sndu_type);
748 }
749 /* else: skb is in correct state; nothing to do. */
750 priv->ule_bridged = 0;
751
752 /* Stuff into kernel's protocol stack. */
753 priv->ule_skb->protocol = dvb_net_eth_type_trans(priv->ule_skb, dev);
754 /* If D-bit is set (i.e. destination MAC address not present),
755 * receive the packet anyhow. */
756 /* if (priv->ule_dbit && skb->pkt_type == PACKET_OTHERHOST)
757 priv->ule_skb->pkt_type = PACKET_HOST; */
758 dev->stats.rx_packets++;
759 dev->stats.rx_bytes += priv->ule_skb->len;
760 netif_rx(priv->ule_skb);
761 }
762 sndu_done:
763 /* Prepare for next SNDU. */
764 reset_ule(priv);
765 }
766
767 /* More data in current TS (look at the bytes following the CRC32)? */
768 if (ts_remain >= 2 && *((unsigned short *)from_where) != 0xFFFF) {
769 /* Next ULE SNDU starts right there. */
770 new_ts = 0;
771 priv->ule_skb = NULL;
772 priv->ule_sndu_type_1 = 0;
773 priv->ule_sndu_len = 0;
774 // printk(KERN_WARNING "More data in current TS: [%#x %#x %#x %#x]\n",
775 // *(from_where + 0), *(from_where + 1),
776 // *(from_where + 2), *(from_where + 3));
777 // printk(KERN_WARNING "ts @ %p, stopped @ %p:\n", ts, from_where + 0);
778 // hexdump(ts, 188);
779 } else {
780 new_ts = 1;
781 ts += TS_SZ;
782 priv->ts_count++;
783 if (priv->ule_skb == NULL) {
784 priv->need_pusi = 1;
785 priv->ule_sndu_type_1 = 0;
786 priv->ule_sndu_len = 0;
787 }
788 }
789 } /* for all available TS cells */
790 }
791
792 static int dvb_net_ts_callback(const u8 *buffer1, size_t buffer1_len,
793 const u8 *buffer2, size_t buffer2_len,
794 struct dmx_ts_feed *feed, enum dmx_success success)
795 {
796 struct net_device *dev = feed->priv;
797
798 if (buffer2)
799 printk(KERN_WARNING "buffer2 not NULL: %p.\n", buffer2);
800 if (buffer1_len > 32768)
801 printk(KERN_WARNING "length > 32k: %zu.\n", buffer1_len);
802 /* printk("TS callback: %u bytes, %u TS cells @ %p.\n",
803 buffer1_len, buffer1_len / TS_SZ, buffer1); */
804 dvb_net_ule(dev, buffer1, buffer1_len);
805 return 0;
806 }
807
808
809 static void dvb_net_sec(struct net_device *dev,
810 const u8 *pkt, int pkt_len)
811 {
812 u8 *eth;
813 struct sk_buff *skb;
814 struct net_device_stats *stats = &dev->stats;
815 int snap = 0;
816
817 /* note: pkt_len includes a 32bit checksum */
818 if (pkt_len < 16) {
819 printk("%s: IP/MPE packet length = %d too small.\n",
820 dev->name, pkt_len);
821 stats->rx_errors++;
822 stats->rx_length_errors++;
823 return;
824 }
825 /* it seems some ISPs manage to screw up here, so we have to
826 * relax the error checks... */
827 #if 0
828 if ((pkt[5] & 0xfd) != 0xc1) {
829 /* drop scrambled or broken packets */
830 #else
831 if ((pkt[5] & 0x3c) != 0x00) {
832 /* drop scrambled */
833 #endif
834 stats->rx_errors++;
835 stats->rx_crc_errors++;
836 return;
837 }
838 if (pkt[5] & 0x02) {
839 /* handle LLC/SNAP, see rfc-1042 */
840 if (pkt_len < 24 || memcmp(&pkt[12], "\xaa\xaa\x03\0\0\0", 6)) {
841 stats->rx_dropped++;
842 return;
843 }
844 snap = 8;
845 }
846 if (pkt[7]) {
847 /* FIXME: assemble datagram from multiple sections */
848 stats->rx_errors++;
849 stats->rx_frame_errors++;
850 return;
851 }
852
853 /* we have 14 byte ethernet header (ip header follows);
854 * 12 byte MPE header; 4 byte checksum; + 2 byte alignment, 8 byte LLC/SNAP
855 */
856 if (!(skb = dev_alloc_skb(pkt_len - 4 - 12 + 14 + 2 - snap))) {
857 //printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n", dev->name);
858 stats->rx_dropped++;
859 return;
860 }
861 skb_reserve(skb, 2); /* longword align L3 header */
862 skb->dev = dev;
863
864 /* copy L3 payload */
865 eth = (u8 *) skb_put(skb, pkt_len - 12 - 4 + 14 - snap);
866 memcpy(eth + 14, pkt + 12 + snap, pkt_len - 12 - 4 - snap);
867
868 /* create ethernet header: */
869 eth[0]=pkt[0x0b];
870 eth[1]=pkt[0x0a];
871 eth[2]=pkt[0x09];
872 eth[3]=pkt[0x08];
873 eth[4]=pkt[0x04];
874 eth[5]=pkt[0x03];
875
876 eth[6]=eth[7]=eth[8]=eth[9]=eth[10]=eth[11]=0;
877
878 if (snap) {
879 eth[12] = pkt[18];
880 eth[13] = pkt[19];
881 } else {
882 /* protocol numbers are from rfc-1700 or
883 * http://www.iana.org/assignments/ethernet-numbers
884 */
885 if (pkt[12] >> 4 == 6) { /* version field from IP header */
886 eth[12] = 0x86; /* IPv6 */
887 eth[13] = 0xdd;
888 } else {
889 eth[12] = 0x08; /* IPv4 */
890 eth[13] = 0x00;
891 }
892 }
893
894 skb->protocol = dvb_net_eth_type_trans(skb, dev);
895
896 stats->rx_packets++;
897 stats->rx_bytes+=skb->len;
898 netif_rx(skb);
899 }
900
901 static int dvb_net_sec_callback(const u8 *buffer1, size_t buffer1_len,
902 const u8 *buffer2, size_t buffer2_len,
903 struct dmx_section_filter *filter,
904 enum dmx_success success)
905 {
906 struct net_device *dev = filter->priv;
907
908 /**
909 * we rely on the DVB API definition where exactly one complete
910 * section is delivered in buffer1
911 */
912 dvb_net_sec (dev, buffer1, buffer1_len);
913 return 0;
914 }
915
916 static int dvb_net_tx(struct sk_buff *skb, struct net_device *dev)
917 {
918 dev_kfree_skb(skb);
919 return NETDEV_TX_OK;
920 }
921
922 static u8 mask_normal[6]={0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
923 static u8 mask_allmulti[6]={0xff, 0xff, 0xff, 0x00, 0x00, 0x00};
924 static u8 mac_allmulti[6]={0x01, 0x00, 0x5e, 0x00, 0x00, 0x00};
925 static u8 mask_promisc[6]={0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
926
927 static int dvb_net_filter_sec_set(struct net_device *dev,
928 struct dmx_section_filter **secfilter,
929 u8 *mac, u8 *mac_mask)
930 {
931 struct dvb_net_priv *priv = netdev_priv(dev);
932 int ret;
933
934 *secfilter=NULL;
935 ret = priv->secfeed->allocate_filter(priv->secfeed, secfilter);
936 if (ret<0) {
937 printk("%s: could not get filter\n", dev->name);
938 return ret;
939 }
940
941 (*secfilter)->priv=(void *) dev;
942
943 memset((*secfilter)->filter_value, 0x00, DMX_MAX_FILTER_SIZE);
944 memset((*secfilter)->filter_mask, 0x00, DMX_MAX_FILTER_SIZE);
945 memset((*secfilter)->filter_mode, 0xff, DMX_MAX_FILTER_SIZE);
946
947 (*secfilter)->filter_value[0]=0x3e;
948 (*secfilter)->filter_value[3]=mac[5];
949 (*secfilter)->filter_value[4]=mac[4];
950 (*secfilter)->filter_value[8]=mac[3];
951 (*secfilter)->filter_value[9]=mac[2];
952 (*secfilter)->filter_value[10]=mac[1];
953 (*secfilter)->filter_value[11]=mac[0];
954
955 (*secfilter)->filter_mask[0] = 0xff;
956 (*secfilter)->filter_mask[3] = mac_mask[5];
957 (*secfilter)->filter_mask[4] = mac_mask[4];
958 (*secfilter)->filter_mask[8] = mac_mask[3];
959 (*secfilter)->filter_mask[9] = mac_mask[2];
960 (*secfilter)->filter_mask[10] = mac_mask[1];
961 (*secfilter)->filter_mask[11]=mac_mask[0];
962
963 dprintk("%s: filter mac=%pM\n", dev->name, mac);
964 dprintk("%s: filter mask=%pM\n", dev->name, mac_mask);
965
966 return 0;
967 }
968
969 static int dvb_net_feed_start(struct net_device *dev)
970 {
971 int ret = 0, i;
972 struct dvb_net_priv *priv = netdev_priv(dev);
973 struct dmx_demux *demux = priv->demux;
974 unsigned char *mac = (unsigned char *) dev->dev_addr;
975
976 dprintk("%s: rx_mode %i\n", __func__, priv->rx_mode);
977 mutex_lock(&priv->mutex);
978 if (priv->tsfeed || priv->secfeed || priv->secfilter || priv->multi_secfilter[0])
979 printk("%s: BUG %d\n", __func__, __LINE__);
980
981 priv->secfeed=NULL;
982 priv->secfilter=NULL;
983 priv->tsfeed = NULL;
984
985 if (priv->feedtype == DVB_NET_FEEDTYPE_MPE) {
986 dprintk("%s: alloc secfeed\n", __func__);
987 ret=demux->allocate_section_feed(demux, &priv->secfeed,
988 dvb_net_sec_callback);
989 if (ret<0) {
990 printk("%s: could not allocate section feed\n", dev->name);
991 goto error;
992 }
993
994 ret = priv->secfeed->set(priv->secfeed, priv->pid, 32768, 1);
995
996 if (ret<0) {
997 printk("%s: could not set section feed\n", dev->name);
998 priv->demux->release_section_feed(priv->demux, priv->secfeed);
999 priv->secfeed=NULL;
1000 goto error;
1001 }
1002
1003 if (priv->rx_mode != RX_MODE_PROMISC) {
1004 dprintk("%s: set secfilter\n", __func__);
1005 dvb_net_filter_sec_set(dev, &priv->secfilter, mac, mask_normal);
1006 }
1007
1008 switch (priv->rx_mode) {
1009 case RX_MODE_MULTI:
1010 for (i = 0; i < priv->multi_num; i++) {
1011 dprintk("%s: set multi_secfilter[%d]\n", __func__, i);
1012 dvb_net_filter_sec_set(dev, &priv->multi_secfilter[i],
1013 priv->multi_macs[i], mask_normal);
1014 }
1015 break;
1016 case RX_MODE_ALL_MULTI:
1017 priv->multi_num=1;
1018 dprintk("%s: set multi_secfilter[0]\n", __func__);
1019 dvb_net_filter_sec_set(dev, &priv->multi_secfilter[0],
1020 mac_allmulti, mask_allmulti);
1021 break;
1022 case RX_MODE_PROMISC:
1023 priv->multi_num=0;
1024 dprintk("%s: set secfilter\n", __func__);
1025 dvb_net_filter_sec_set(dev, &priv->secfilter, mac, mask_promisc);
1026 break;
1027 }
1028
1029 dprintk("%s: start filtering\n", __func__);
1030 priv->secfeed->start_filtering(priv->secfeed);
1031 } else if (priv->feedtype == DVB_NET_FEEDTYPE_ULE) {
1032 struct timespec timeout = { 0, 10000000 }; // 10 msec
1033
1034 /* we have payloads encapsulated in TS */
1035 dprintk("%s: alloc tsfeed\n", __func__);
1036 ret = demux->allocate_ts_feed(demux, &priv->tsfeed, dvb_net_ts_callback);
1037 if (ret < 0) {
1038 printk("%s: could not allocate ts feed\n", dev->name);
1039 goto error;
1040 }
1041
1042 /* Set netdevice pointer for ts decaps callback. */
1043 priv->tsfeed->priv = (void *)dev;
1044 ret = priv->tsfeed->set(priv->tsfeed,
1045 priv->pid, /* pid */
1046 TS_PACKET, /* type */
1047 DMX_TS_PES_OTHER, /* pes type */
1048 32768, /* circular buffer size */
1049 timeout /* timeout */
1050 );
1051
1052 if (ret < 0) {
1053 printk("%s: could not set ts feed\n", dev->name);
1054 priv->demux->release_ts_feed(priv->demux, priv->tsfeed);
1055 priv->tsfeed = NULL;
1056 goto error;
1057 }
1058
1059 dprintk("%s: start filtering\n", __func__);
1060 priv->tsfeed->start_filtering(priv->tsfeed);
1061 } else
1062 ret = -EINVAL;
1063
1064 error:
1065 mutex_unlock(&priv->mutex);
1066 return ret;
1067 }
1068
1069 static int dvb_net_feed_stop(struct net_device *dev)
1070 {
1071 struct dvb_net_priv *priv = netdev_priv(dev);
1072 int i, ret = 0;
1073
1074 dprintk("%s\n", __func__);
1075 mutex_lock(&priv->mutex);
1076 if (priv->feedtype == DVB_NET_FEEDTYPE_MPE) {
1077 if (priv->secfeed) {
1078 if (priv->secfeed->is_filtering) {
1079 dprintk("%s: stop secfeed\n", __func__);
1080 priv->secfeed->stop_filtering(priv->secfeed);
1081 }
1082
1083 if (priv->secfilter) {
1084 dprintk("%s: release secfilter\n", __func__);
1085 priv->secfeed->release_filter(priv->secfeed,
1086 priv->secfilter);
1087 priv->secfilter=NULL;
1088 }
1089
1090 for (i=0; i<priv->multi_num; i++) {
1091 if (priv->multi_secfilter[i]) {
1092 dprintk("%s: release multi_filter[%d]\n",
1093 __func__, i);
1094 priv->secfeed->release_filter(priv->secfeed,
1095 priv->multi_secfilter[i]);
1096 priv->multi_secfilter[i] = NULL;
1097 }
1098 }
1099
1100 priv->demux->release_section_feed(priv->demux, priv->secfeed);
1101 priv->secfeed = NULL;
1102 } else
1103 printk("%s: no feed to stop\n", dev->name);
1104 } else if (priv->feedtype == DVB_NET_FEEDTYPE_ULE) {
1105 if (priv->tsfeed) {
1106 if (priv->tsfeed->is_filtering) {
1107 dprintk("%s: stop tsfeed\n", __func__);
1108 priv->tsfeed->stop_filtering(priv->tsfeed);
1109 }
1110 priv->demux->release_ts_feed(priv->demux, priv->tsfeed);
1111 priv->tsfeed = NULL;
1112 }
1113 else
1114 printk("%s: no ts feed to stop\n", dev->name);
1115 } else
1116 ret = -EINVAL;
1117 mutex_unlock(&priv->mutex);
1118 return ret;
1119 }
1120
1121
1122 static int dvb_set_mc_filter(struct net_device *dev, unsigned char *addr)
1123 {
1124 struct dvb_net_priv *priv = netdev_priv(dev);
1125
1126 if (priv->multi_num == DVB_NET_MULTICAST_MAX)
1127 return -ENOMEM;
1128
1129 memcpy(priv->multi_macs[priv->multi_num], addr, ETH_ALEN);
1130
1131 priv->multi_num++;
1132 return 0;
1133 }
1134
1135
1136 static void wq_set_multicast_list (struct work_struct *work)
1137 {
1138 struct dvb_net_priv *priv =
1139 container_of(work, struct dvb_net_priv, set_multicast_list_wq);
1140 struct net_device *dev = priv->net;
1141
1142 dvb_net_feed_stop(dev);
1143 priv->rx_mode = RX_MODE_UNI;
1144 netif_addr_lock_bh(dev);
1145
1146 if (dev->flags & IFF_PROMISC) {
1147 dprintk("%s: promiscuous mode\n", dev->name);
1148 priv->rx_mode = RX_MODE_PROMISC;
1149 } else if ((dev->flags & IFF_ALLMULTI)) {
1150 dprintk("%s: allmulti mode\n", dev->name);
1151 priv->rx_mode = RX_MODE_ALL_MULTI;
1152 } else if (!netdev_mc_empty(dev)) {
1153 struct netdev_hw_addr *ha;
1154
1155 dprintk("%s: set_mc_list, %d entries\n",
1156 dev->name, netdev_mc_count(dev));
1157
1158 priv->rx_mode = RX_MODE_MULTI;
1159 priv->multi_num = 0;
1160
1161 netdev_for_each_mc_addr(ha, dev)
1162 dvb_set_mc_filter(dev, ha->addr);
1163 }
1164
1165 netif_addr_unlock_bh(dev);
1166 dvb_net_feed_start(dev);
1167 }
1168
1169
1170 static void dvb_net_set_multicast_list (struct net_device *dev)
1171 {
1172 struct dvb_net_priv *priv = netdev_priv(dev);
1173 schedule_work(&priv->set_multicast_list_wq);
1174 }
1175
1176
1177 static void wq_restart_net_feed (struct work_struct *work)
1178 {
1179 struct dvb_net_priv *priv =
1180 container_of(work, struct dvb_net_priv, restart_net_feed_wq);
1181 struct net_device *dev = priv->net;
1182
1183 if (netif_running(dev)) {
1184 dvb_net_feed_stop(dev);
1185 dvb_net_feed_start(dev);
1186 }
1187 }
1188
1189
1190 static int dvb_net_set_mac (struct net_device *dev, void *p)
1191 {
1192 struct dvb_net_priv *priv = netdev_priv(dev);
1193 struct sockaddr *addr=p;
1194
1195 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1196
1197 if (netif_running(dev))
1198 schedule_work(&priv->restart_net_feed_wq);
1199
1200 return 0;
1201 }
1202
1203
1204 static int dvb_net_open(struct net_device *dev)
1205 {
1206 struct dvb_net_priv *priv = netdev_priv(dev);
1207
1208 priv->in_use++;
1209 dvb_net_feed_start(dev);
1210 return 0;
1211 }
1212
1213
1214 static int dvb_net_stop(struct net_device *dev)
1215 {
1216 struct dvb_net_priv *priv = netdev_priv(dev);
1217
1218 priv->in_use--;
1219 return dvb_net_feed_stop(dev);
1220 }
1221
1222 static const struct header_ops dvb_header_ops = {
1223 .create = eth_header,
1224 .parse = eth_header_parse,
1225 .rebuild = eth_rebuild_header,
1226 };
1227
1228
1229 static const struct net_device_ops dvb_netdev_ops = {
1230 .ndo_open = dvb_net_open,
1231 .ndo_stop = dvb_net_stop,
1232 .ndo_start_xmit = dvb_net_tx,
1233 .ndo_set_rx_mode = dvb_net_set_multicast_list,
1234 .ndo_set_mac_address = dvb_net_set_mac,
1235 .ndo_change_mtu = eth_change_mtu,
1236 .ndo_validate_addr = eth_validate_addr,
1237 };
1238
1239 static void dvb_net_setup(struct net_device *dev)
1240 {
1241 ether_setup(dev);
1242
1243 dev->header_ops = &dvb_header_ops;
1244 dev->netdev_ops = &dvb_netdev_ops;
1245 dev->mtu = 4096;
1246
1247 dev->flags |= IFF_NOARP;
1248 }
1249
1250 static int get_if(struct dvb_net *dvbnet)
1251 {
1252 int i;
1253
1254 for (i=0; i<DVB_NET_DEVICES_MAX; i++)
1255 if (!dvbnet->state[i])
1256 break;
1257
1258 if (i == DVB_NET_DEVICES_MAX)
1259 return -1;
1260
1261 dvbnet->state[i]=1;
1262 return i;
1263 }
1264
1265 static int dvb_net_add_if(struct dvb_net *dvbnet, u16 pid, u8 feedtype)
1266 {
1267 struct net_device *net;
1268 struct dvb_net_priv *priv;
1269 int result;
1270 int if_num;
1271
1272 if (feedtype != DVB_NET_FEEDTYPE_MPE && feedtype != DVB_NET_FEEDTYPE_ULE)
1273 return -EINVAL;
1274 if ((if_num = get_if(dvbnet)) < 0)
1275 return -EINVAL;
1276
1277 net = alloc_netdev(sizeof(struct dvb_net_priv), "dvb", dvb_net_setup);
1278 if (!net)
1279 return -ENOMEM;
1280
1281 if (dvbnet->dvbdev->id)
1282 snprintf(net->name, IFNAMSIZ, "dvb%d%u%d",
1283 dvbnet->dvbdev->adapter->num, dvbnet->dvbdev->id, if_num);
1284 else
1285 /* compatibility fix to keep dvb0_0 format */
1286 snprintf(net->name, IFNAMSIZ, "dvb%d_%d",
1287 dvbnet->dvbdev->adapter->num, if_num);
1288
1289 net->addr_len = 6;
1290 memcpy(net->dev_addr, dvbnet->dvbdev->adapter->proposed_mac, 6);
1291
1292 dvbnet->device[if_num] = net;
1293
1294 priv = netdev_priv(net);
1295 priv->net = net;
1296 priv->demux = dvbnet->demux;
1297 priv->pid = pid;
1298 priv->rx_mode = RX_MODE_UNI;
1299 priv->need_pusi = 1;
1300 priv->tscc = 0;
1301 priv->feedtype = feedtype;
1302 reset_ule(priv);
1303
1304 INIT_WORK(&priv->set_multicast_list_wq, wq_set_multicast_list);
1305 INIT_WORK(&priv->restart_net_feed_wq, wq_restart_net_feed);
1306 mutex_init(&priv->mutex);
1307
1308 net->base_addr = pid;
1309
1310 if ((result = register_netdev(net)) < 0) {
1311 dvbnet->device[if_num] = NULL;
1312 free_netdev(net);
1313 return result;
1314 }
1315 printk("dvb_net: created network interface %s\n", net->name);
1316
1317 return if_num;
1318 }
1319
1320 static int dvb_net_remove_if(struct dvb_net *dvbnet, unsigned long num)
1321 {
1322 struct net_device *net = dvbnet->device[num];
1323 struct dvb_net_priv *priv;
1324
1325 if (!dvbnet->state[num])
1326 return -EINVAL;
1327 priv = netdev_priv(net);
1328 if (priv->in_use)
1329 return -EBUSY;
1330
1331 dvb_net_stop(net);
1332 flush_work(&priv->set_multicast_list_wq);
1333 flush_work(&priv->restart_net_feed_wq);
1334 printk("dvb_net: removed network interface %s\n", net->name);
1335 unregister_netdev(net);
1336 dvbnet->state[num]=0;
1337 dvbnet->device[num] = NULL;
1338 free_netdev(net);
1339
1340 return 0;
1341 }
1342
1343 static int dvb_net_do_ioctl(struct file *file,
1344 unsigned int cmd, void *parg)
1345 {
1346 struct dvb_device *dvbdev = file->private_data;
1347 struct dvb_net *dvbnet = dvbdev->priv;
1348
1349 if (((file->f_flags&O_ACCMODE)==O_RDONLY))
1350 return -EPERM;
1351
1352 switch (cmd) {
1353 case NET_ADD_IF:
1354 {
1355 struct dvb_net_if *dvbnetif = parg;
1356 int result;
1357
1358 if (!capable(CAP_SYS_ADMIN))
1359 return -EPERM;
1360
1361 if (!try_module_get(dvbdev->adapter->module))
1362 return -EPERM;
1363
1364 result=dvb_net_add_if(dvbnet, dvbnetif->pid, dvbnetif->feedtype);
1365 if (result<0) {
1366 module_put(dvbdev->adapter->module);
1367 return result;
1368 }
1369 dvbnetif->if_num=result;
1370 break;
1371 }
1372 case NET_GET_IF:
1373 {
1374 struct net_device *netdev;
1375 struct dvb_net_priv *priv_data;
1376 struct dvb_net_if *dvbnetif = parg;
1377
1378 if (dvbnetif->if_num >= DVB_NET_DEVICES_MAX ||
1379 !dvbnet->state[dvbnetif->if_num])
1380 return -EINVAL;
1381
1382 netdev = dvbnet->device[dvbnetif->if_num];
1383
1384 priv_data = netdev_priv(netdev);
1385 dvbnetif->pid=priv_data->pid;
1386 dvbnetif->feedtype=priv_data->feedtype;
1387 break;
1388 }
1389 case NET_REMOVE_IF:
1390 {
1391 int ret;
1392
1393 if (!capable(CAP_SYS_ADMIN))
1394 return -EPERM;
1395 if ((unsigned long) parg >= DVB_NET_DEVICES_MAX)
1396 return -EINVAL;
1397 ret = dvb_net_remove_if(dvbnet, (unsigned long) parg);
1398 if (!ret)
1399 module_put(dvbdev->adapter->module);
1400 return ret;
1401 }
1402
1403 /* binary compatibility cruft */
1404 case __NET_ADD_IF_OLD:
1405 {
1406 struct __dvb_net_if_old *dvbnetif = parg;
1407 int result;
1408
1409 if (!capable(CAP_SYS_ADMIN))
1410 return -EPERM;
1411
1412 if (!try_module_get(dvbdev->adapter->module))
1413 return -EPERM;
1414
1415 result=dvb_net_add_if(dvbnet, dvbnetif->pid, DVB_NET_FEEDTYPE_MPE);
1416 if (result<0) {
1417 module_put(dvbdev->adapter->module);
1418 return result;
1419 }
1420 dvbnetif->if_num=result;
1421 break;
1422 }
1423 case __NET_GET_IF_OLD:
1424 {
1425 struct net_device *netdev;
1426 struct dvb_net_priv *priv_data;
1427 struct __dvb_net_if_old *dvbnetif = parg;
1428
1429 if (dvbnetif->if_num >= DVB_NET_DEVICES_MAX ||
1430 !dvbnet->state[dvbnetif->if_num])
1431 return -EINVAL;
1432
1433 netdev = dvbnet->device[dvbnetif->if_num];
1434
1435 priv_data = netdev_priv(netdev);
1436 dvbnetif->pid=priv_data->pid;
1437 break;
1438 }
1439 default:
1440 return -ENOTTY;
1441 }
1442 return 0;
1443 }
1444
1445 static long dvb_net_ioctl(struct file *file,
1446 unsigned int cmd, unsigned long arg)
1447 {
1448 return dvb_usercopy(file, cmd, arg, dvb_net_do_ioctl);
1449 }
1450
1451 static int dvb_net_close(struct inode *inode, struct file *file)
1452 {
1453 struct dvb_device *dvbdev = file->private_data;
1454 struct dvb_net *dvbnet = dvbdev->priv;
1455
1456 dvb_generic_release(inode, file);
1457
1458 if(dvbdev->users == 1 && dvbnet->exit == 1) {
1459 fops_put(file->f_op);
1460 file->f_op = NULL;
1461 wake_up(&dvbdev->wait_queue);
1462 }
1463 return 0;
1464 }
1465
1466
1467 static const struct file_operations dvb_net_fops = {
1468 .owner = THIS_MODULE,
1469 .unlocked_ioctl = dvb_net_ioctl,
1470 .open = dvb_generic_open,
1471 .release = dvb_net_close,
1472 .llseek = noop_llseek,
1473 };
1474
1475 static struct dvb_device dvbdev_net = {
1476 .priv = NULL,
1477 .users = 1,
1478 .writers = 1,
1479 .fops = &dvb_net_fops,
1480 };
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 dvbnet->demux = dmx;
1509
1510 for (i=0; i<DVB_NET_DEVICES_MAX; i++)
1511 dvbnet->state[i] = 0;
1512
1513 return dvb_register_device(adap, &dvbnet->dvbdev, &dvbdev_net,
1514 dvbnet, DVB_DEVICE_NET);
1515 }
1516 EXPORT_SYMBOL(dvb_net_init);
Linux kernel - Deliverables
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