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Merge master.kernel.org:/pub/scm/linux/kernel/git/wim/linux-2.6-watchdog
[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
67 #include "dvb_demux.h"
68 #include "dvb_net.h"
69
70 static int dvb_net_debug;
71 module_param(dvb_net_debug, int, 0444);
72 MODULE_PARM_DESC(dvb_net_debug, "enable debug messages");
73
74 #define dprintk(x...) do { if (dvb_net_debug) printk(x); } while (0)
75
76
77 static inline __u32 iov_crc32( __u32 c, struct kvec *iov, unsigned int cnt )
78 {
79 unsigned int j;
80 for (j = 0; j < cnt; j++)
81 c = crc32_be( c, iov[j].iov_base, iov[j].iov_len );
82 return c;
83 }
84
85
86 #define DVB_NET_MULTICAST_MAX 10
87
88 #undef ULE_DEBUG
89
90 #ifdef ULE_DEBUG
91
92 #define MAC_ADDR_PRINTFMT "%.2x:%.2x:%.2x:%.2x:%.2x:%.2x"
93 #define MAX_ADDR_PRINTFMT_ARGS(macap) (macap)[0],(macap)[1],(macap)[2],(macap)[3],(macap)[4],(macap)[5]
94
95 #define isprint(c) ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || (c >= '0' && c <= '9'))
96
97 static void hexdump( const unsigned char *buf, unsigned short len )
98 {
99 char str[80], octet[10];
100 int ofs, i, l;
101
102 for (ofs = 0; ofs < len; ofs += 16) {
103 sprintf( str, "%03d: ", ofs );
104
105 for (i = 0; i < 16; i++) {
106 if ((i + ofs) < len)
107 sprintf( octet, "%02x ", buf[ofs + i] );
108 else
109 strcpy( octet, " " );
110
111 strcat( str, octet );
112 }
113 strcat( str, " " );
114 l = strlen( str );
115
116 for (i = 0; (i < 16) && ((i + ofs) < len); i++)
117 str[l++] = isprint( buf[ofs + i] ) ? buf[ofs + i] : '.';
118
119 str[l] = '\0';
120 printk( KERN_WARNING "%s\n", str );
121 }
122 }
123
124 #endif
125
126 struct dvb_net_priv {
127 int in_use;
128 struct net_device_stats stats;
129 u16 pid;
130 struct dvb_net *host;
131 struct dmx_demux *demux;
132 struct dmx_section_feed *secfeed;
133 struct dmx_section_filter *secfilter;
134 struct dmx_ts_feed *tsfeed;
135 int multi_num;
136 struct dmx_section_filter *multi_secfilter[DVB_NET_MULTICAST_MAX];
137 unsigned char multi_macs[DVB_NET_MULTICAST_MAX][6];
138 int rx_mode;
139 #define RX_MODE_UNI 0
140 #define RX_MODE_MULTI 1
141 #define RX_MODE_ALL_MULTI 2
142 #define RX_MODE_PROMISC 3
143 struct work_struct set_multicast_list_wq;
144 struct work_struct restart_net_feed_wq;
145 unsigned char feedtype; /* Either FEED_TYPE_ or FEED_TYPE_ULE */
146 int need_pusi; /* Set to 1, if synchronization on PUSI required. */
147 unsigned char tscc; /* TS continuity counter after sync on PUSI. */
148 struct sk_buff *ule_skb; /* ULE SNDU decodes into this buffer. */
149 unsigned char *ule_next_hdr; /* Pointer into skb to next ULE extension header. */
150 unsigned short ule_sndu_len; /* ULE SNDU length in bytes, w/o D-Bit. */
151 unsigned short ule_sndu_type; /* ULE SNDU type field, complete. */
152 unsigned char ule_sndu_type_1; /* ULE SNDU type field, if split across 2 TS cells. */
153 unsigned char ule_dbit; /* Whether the DestMAC address present
154 * or not (bit is set). */
155 unsigned char ule_bridged; /* Whether the ULE_BRIDGED extension header was found. */
156 int ule_sndu_remain; /* Nr. of bytes still required for current ULE SNDU. */
157 unsigned long ts_count; /* Current ts cell counter. */
158 struct mutex mutex;
159 };
160
161
162 /**
163 * Determine the packet's protocol ID. The rule here is that we
164 * assume 802.3 if the type field is short enough to be a length.
165 * This is normal practice and works for any 'now in use' protocol.
166 *
167 * stolen from eth.c out of the linux kernel, hacked for dvb-device
168 * by Michael Holzt <kju@debian.org>
169 */
170 static unsigned short dvb_net_eth_type_trans(struct sk_buff *skb,
171 struct net_device *dev)
172 {
173 struct ethhdr *eth;
174 unsigned char *rawp;
175
176 skb->mac.raw=skb->data;
177 skb_pull(skb,dev->hard_header_len);
178 eth = eth_hdr(skb);
179
180 if (*eth->h_dest & 1) {
181 if(memcmp(eth->h_dest,dev->broadcast, ETH_ALEN)==0)
182 skb->pkt_type=PACKET_BROADCAST;
183 else
184 skb->pkt_type=PACKET_MULTICAST;
185 }
186
187 if (ntohs(eth->h_proto) >= 1536)
188 return eth->h_proto;
189
190 rawp = skb->data;
191
192 /**
193 * This is a magic hack to spot IPX packets. Older Novell breaks
194 * the protocol design and runs IPX over 802.3 without an 802.2 LLC
195 * layer. We look for FFFF which isn't a used 802.2 SSAP/DSAP. This
196 * won't work for fault tolerant netware but does for the rest.
197 */
198 if (*(unsigned short *)rawp == 0xFFFF)
199 return htons(ETH_P_802_3);
200
201 /**
202 * Real 802.2 LLC
203 */
204 return htons(ETH_P_802_2);
205 }
206
207 #define TS_SZ 188
208 #define TS_SYNC 0x47
209 #define TS_TEI 0x80
210 #define TS_SC 0xC0
211 #define TS_PUSI 0x40
212 #define TS_AF_A 0x20
213 #define TS_AF_D 0x10
214
215 /* ULE Extension Header handlers. */
216
217 #define ULE_TEST 0
218 #define ULE_BRIDGED 1
219
220 #define ULE_OPTEXTHDR_PADDING 0
221
222 static int ule_test_sndu( struct dvb_net_priv *p )
223 {
224 return -1;
225 }
226
227 static int ule_bridged_sndu( struct dvb_net_priv *p )
228 {
229 struct ethhdr *hdr = (struct ethhdr*) p->ule_next_hdr;
230 if(ntohs(hdr->h_proto) < 1536) {
231 int framelen = p->ule_sndu_len - ((p->ule_next_hdr+sizeof(struct ethhdr)) - p->ule_skb->data);
232 /* A frame Type < 1536 for a bridged frame, introduces a LLC Length field. */
233 if(framelen != ntohs(hdr->h_proto)) {
234 return -1;
235 }
236 }
237 /* Note:
238 * From RFC4326:
239 * "A bridged SNDU is a Mandatory Extension Header of Type 1.
240 * It must be the final (or only) extension header specified in the header chain of a SNDU."
241 * The 'ule_bridged' flag will cause the extension header processing loop to terminate.
242 */
243 p->ule_bridged = 1;
244 return 0;
245 }
246
247 static int ule_exthdr_padding(struct dvb_net_priv *p)
248 {
249 return 0;
250 }
251
252 /** Handle ULE extension headers.
253 * Function is called after a successful CRC32 verification of an ULE SNDU to complete its decoding.
254 * Returns: >= 0: nr. of bytes consumed by next extension header
255 * -1: Mandatory extension header that is not recognized or TEST SNDU; discard.
256 */
257 static int handle_one_ule_extension( struct dvb_net_priv *p )
258 {
259 /* Table of mandatory extension header handlers. The header type is the index. */
260 static int (*ule_mandatory_ext_handlers[255])( struct dvb_net_priv *p ) =
261 { [0] = ule_test_sndu, [1] = ule_bridged_sndu, [2] = NULL, };
262
263 /* Table of optional extension header handlers. The header type is the index. */
264 static int (*ule_optional_ext_handlers[255])( struct dvb_net_priv *p ) =
265 { [0] = ule_exthdr_padding, [1] = NULL, };
266
267 int ext_len = 0;
268 unsigned char hlen = (p->ule_sndu_type & 0x0700) >> 8;
269 unsigned char htype = p->ule_sndu_type & 0x00FF;
270
271 /* Discriminate mandatory and optional extension headers. */
272 if (hlen == 0) {
273 /* Mandatory extension header */
274 if (ule_mandatory_ext_handlers[htype]) {
275 ext_len = ule_mandatory_ext_handlers[htype]( p );
276 if(ext_len >= 0) {
277 p->ule_next_hdr += ext_len;
278 if (!p->ule_bridged) {
279 p->ule_sndu_type = ntohs(*(unsigned short *)p->ule_next_hdr);
280 p->ule_next_hdr += 2;
281 } else {
282 p->ule_sndu_type = ntohs(*(unsigned short *)(p->ule_next_hdr + ((p->ule_dbit ? 2 : 3) * ETH_ALEN)));
283 /* This assures the extension handling loop will terminate. */
284 }
285 }
286 // else: extension handler failed or SNDU should be discarded
287 } else
288 ext_len = -1; /* SNDU has to be discarded. */
289 } else {
290 /* Optional extension header. Calculate the length. */
291 ext_len = hlen << 1;
292 /* Process the optional extension header according to its type. */
293 if (ule_optional_ext_handlers[htype])
294 (void)ule_optional_ext_handlers[htype]( p );
295 p->ule_next_hdr += ext_len;
296 p->ule_sndu_type = ntohs( *(unsigned short *)(p->ule_next_hdr-2) );
297 /*
298 * note: the length of the next header type is included in the
299 * length of THIS optional extension header
300 */
301 }
302
303 return ext_len;
304 }
305
306 static int handle_ule_extensions( struct dvb_net_priv *p )
307 {
308 int total_ext_len = 0, l;
309
310 p->ule_next_hdr = p->ule_skb->data;
311 do {
312 l = handle_one_ule_extension( p );
313 if (l < 0)
314 return l; /* Stop extension header processing and discard SNDU. */
315 total_ext_len += l;
316 #ifdef ULE_DEBUG
317 dprintk("handle_ule_extensions: ule_next_hdr=%p, ule_sndu_type=%i, "
318 "l=%i, total_ext_len=%i\n", p->ule_next_hdr,
319 (int) p->ule_sndu_type, l, total_ext_len);
320 #endif
321
322 } while (p->ule_sndu_type < 1536);
323
324 return total_ext_len;
325 }
326
327
328 /** Prepare for a new ULE SNDU: reset the decoder state. */
329 static inline void reset_ule( struct dvb_net_priv *p )
330 {
331 p->ule_skb = NULL;
332 p->ule_next_hdr = NULL;
333 p->ule_sndu_len = 0;
334 p->ule_sndu_type = 0;
335 p->ule_sndu_type_1 = 0;
336 p->ule_sndu_remain = 0;
337 p->ule_dbit = 0xFF;
338 p->ule_bridged = 0;
339 }
340
341 /**
342 * Decode ULE SNDUs according to draft-ietf-ipdvb-ule-03.txt from a sequence of
343 * TS cells of a single PID.
344 */
345 static void dvb_net_ule( struct net_device *dev, const u8 *buf, size_t buf_len )
346 {
347 struct dvb_net_priv *priv = dev->priv;
348 unsigned long skipped = 0L;
349 u8 *ts, *ts_end, *from_where = NULL, ts_remain = 0, how_much = 0, new_ts = 1;
350 struct ethhdr *ethh = NULL;
351
352 #ifdef ULE_DEBUG
353 /* The code inside ULE_DEBUG keeps a history of the last 100 TS cells processed. */
354 static unsigned char ule_hist[100*TS_SZ];
355 static unsigned char *ule_where = ule_hist, ule_dump = 0;
356 #endif
357
358 if (dev == NULL) {
359 printk( KERN_ERR "NO netdev struct!\n" );
360 return;
361 }
362
363 /* For all TS cells in current buffer.
364 * Appearently, we are called for every single TS cell.
365 */
366 for (ts = (char *)buf, ts_end = (char *)buf + buf_len; ts < ts_end; /* no default incr. */ ) {
367
368 if (new_ts) {
369 /* We are about to process a new TS cell. */
370
371 #ifdef ULE_DEBUG
372 if (ule_where >= &ule_hist[100*TS_SZ]) ule_where = ule_hist;
373 memcpy( ule_where, ts, TS_SZ );
374 if (ule_dump) {
375 hexdump( ule_where, TS_SZ );
376 ule_dump = 0;
377 }
378 ule_where += TS_SZ;
379 #endif
380
381 /* Check TS error conditions: sync_byte, transport_error_indicator, scrambling_control . */
382 if ((ts[0] != TS_SYNC) || (ts[1] & TS_TEI) || ((ts[3] & TS_SC) != 0)) {
383 printk(KERN_WARNING "%lu: Invalid TS cell: SYNC %#x, TEI %u, SC %#x.\n",
384 priv->ts_count, ts[0], ts[1] & TS_TEI >> 7, ts[3] & 0xC0 >> 6);
385
386 /* Drop partly decoded SNDU, reset state, resync on PUSI. */
387 if (priv->ule_skb) {
388 dev_kfree_skb( priv->ule_skb );
389 /* Prepare for next SNDU. */
390 priv->stats.rx_errors++;
391 priv->stats.rx_frame_errors++;
392 }
393 reset_ule(priv);
394 priv->need_pusi = 1;
395
396 /* Continue with next TS cell. */
397 ts += TS_SZ;
398 priv->ts_count++;
399 continue;
400 }
401
402 ts_remain = 184;
403 from_where = ts + 4;
404 }
405 /* Synchronize on PUSI, if required. */
406 if (priv->need_pusi) {
407 if (ts[1] & TS_PUSI) {
408 /* Find beginning of first ULE SNDU in current TS cell. */
409 /* Synchronize continuity counter. */
410 priv->tscc = ts[3] & 0x0F;
411 /* There is a pointer field here. */
412 if (ts[4] > ts_remain) {
413 printk(KERN_ERR "%lu: Invalid ULE packet "
414 "(pointer field %d)\n", priv->ts_count, ts[4]);
415 ts += TS_SZ;
416 priv->ts_count++;
417 continue;
418 }
419 /* Skip to destination of pointer field. */
420 from_where = &ts[5] + ts[4];
421 ts_remain -= 1 + ts[4];
422 skipped = 0;
423 } else {
424 skipped++;
425 ts += TS_SZ;
426 priv->ts_count++;
427 continue;
428 }
429 }
430
431 if (new_ts) {
432 /* Check continuity counter. */
433 if ((ts[3] & 0x0F) == priv->tscc)
434 priv->tscc = (priv->tscc + 1) & 0x0F;
435 else {
436 /* TS discontinuity handling: */
437 printk(KERN_WARNING "%lu: TS discontinuity: got %#x, "
438 "expected %#x.\n", priv->ts_count, ts[3] & 0x0F, priv->tscc);
439 /* Drop partly decoded SNDU, reset state, resync on PUSI. */
440 if (priv->ule_skb) {
441 dev_kfree_skb( priv->ule_skb );
442 /* Prepare for next SNDU. */
443 // reset_ule(priv); moved to below.
444 priv->stats.rx_errors++;
445 priv->stats.rx_frame_errors++;
446 }
447 reset_ule(priv);
448 /* skip to next PUSI. */
449 priv->need_pusi = 1;
450 continue;
451 }
452 /* If we still have an incomplete payload, but PUSI is
453 * set; some TS cells are missing.
454 * This is only possible here, if we missed exactly 16 TS
455 * cells (continuity counter wrap). */
456 if (ts[1] & TS_PUSI) {
457 if (! priv->need_pusi) {
458 if (!(*from_where < (ts_remain-1)) || *from_where != priv->ule_sndu_remain) {
459 /* Pointer field is invalid. Drop this TS cell and any started ULE SNDU. */
460 printk(KERN_WARNING "%lu: Invalid pointer "
461 "field: %u.\n", priv->ts_count, *from_where);
462
463 /* Drop partly decoded SNDU, reset state, resync on PUSI. */
464 if (priv->ule_skb) {
465 dev_kfree_skb( priv->ule_skb );
466 ((struct dvb_net_priv *) dev->priv)->stats.rx_errors++;
467 ((struct dvb_net_priv *) dev->priv)->stats.rx_frame_errors++;
468 }
469 reset_ule(priv);
470 priv->need_pusi = 1;
471 continue;
472 }
473 /* Skip pointer field (we're processing a
474 * packed payload). */
475 from_where += 1;
476 ts_remain -= 1;
477 } else
478 priv->need_pusi = 0;
479
480 if (priv->ule_sndu_remain > 183) {
481 /* Current SNDU lacks more data than there could be available in the
482 * current TS cell. */
483 priv->stats.rx_errors++;
484 priv->stats.rx_length_errors++;
485 printk(KERN_WARNING "%lu: Expected %d more SNDU bytes, but "
486 "got PUSI (pf %d, ts_remain %d). Flushing incomplete payload.\n",
487 priv->ts_count, priv->ule_sndu_remain, ts[4], ts_remain);
488 dev_kfree_skb(priv->ule_skb);
489 /* Prepare for next SNDU. */
490 reset_ule(priv);
491 /* Resync: go to where pointer field points to: start of next ULE SNDU. */
492 from_where += ts[4];
493 ts_remain -= ts[4];
494 }
495 }
496 }
497
498 /* Check if new payload needs to be started. */
499 if (priv->ule_skb == NULL) {
500 /* Start a new payload with skb.
501 * Find ULE header. It is only guaranteed that the
502 * length field (2 bytes) is contained in the current
503 * TS.
504 * Check ts_remain has to be >= 2 here. */
505 if (ts_remain < 2) {
506 printk(KERN_WARNING "Invalid payload packing: only %d "
507 "bytes left in TS. Resyncing.\n", ts_remain);
508 priv->ule_sndu_len = 0;
509 priv->need_pusi = 1;
510 continue;
511 }
512
513 if (! priv->ule_sndu_len) {
514 /* Got at least two bytes, thus extrace the SNDU length. */
515 priv->ule_sndu_len = from_where[0] << 8 | from_where[1];
516 if (priv->ule_sndu_len & 0x8000) {
517 /* D-Bit is set: no dest mac present. */
518 priv->ule_sndu_len &= 0x7FFF;
519 priv->ule_dbit = 1;
520 } else
521 priv->ule_dbit = 0;
522
523 if (priv->ule_sndu_len < 5) {
524 printk(KERN_WARNING "%lu: Invalid ULE SNDU length %u. "
525 "Resyncing.\n", priv->ts_count, priv->ule_sndu_len);
526 priv->stats.rx_errors++;
527 priv->stats.rx_length_errors++;
528 priv->ule_sndu_len = 0;
529 priv->need_pusi = 1;
530 new_ts = 1;
531 ts += TS_SZ;
532 priv->ts_count++;
533 continue;
534 }
535 ts_remain -= 2; /* consume the 2 bytes SNDU length. */
536 from_where += 2;
537 }
538
539 /*
540 * State of current TS:
541 * ts_remain (remaining bytes in the current TS cell)
542 * 0 ule_type is not available now, we need the next TS cell
543 * 1 the first byte of the ule_type is present
544 * >=2 full ULE header present, maybe some payload data as well.
545 */
546 switch (ts_remain) {
547 case 1:
548 priv->ule_sndu_type = from_where[0] << 8;
549 priv->ule_sndu_type_1 = 1; /* first byte of ule_type is set. */
550 ts_remain -= 1; from_where += 1;
551 /* Continue w/ next TS. */
552 case 0:
553 new_ts = 1;
554 ts += TS_SZ;
555 priv->ts_count++;
556 continue;
557
558 default: /* complete ULE header is present in current TS. */
559 /* Extract ULE type field. */
560 if (priv->ule_sndu_type_1) {
561 priv->ule_sndu_type |= from_where[0];
562 from_where += 1; /* points to payload start. */
563 ts_remain -= 1;
564 } else {
565 /* Complete type is present in new TS. */
566 priv->ule_sndu_type = from_where[0] << 8 | from_where[1];
567 from_where += 2; /* points to payload start. */
568 ts_remain -= 2;
569 }
570 break;
571 }
572
573 /* Allocate the skb (decoder target buffer) with the correct size, as follows:
574 * prepare for the largest case: bridged SNDU with MAC address (dbit = 0). */
575 priv->ule_skb = dev_alloc_skb( priv->ule_sndu_len + ETH_HLEN + ETH_ALEN );
576 if (priv->ule_skb == NULL) {
577 printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n",
578 dev->name);
579 ((struct dvb_net_priv *)dev->priv)->stats.rx_dropped++;
580 return;
581 }
582
583 /* This includes the CRC32 _and_ dest mac, if !dbit. */
584 priv->ule_sndu_remain = priv->ule_sndu_len;
585 priv->ule_skb->dev = dev;
586 /* Leave space for Ethernet or bridged SNDU header (eth hdr plus one MAC addr). */
587 skb_reserve( priv->ule_skb, ETH_HLEN + ETH_ALEN );
588 }
589
590 /* Copy data into our current skb. */
591 how_much = min(priv->ule_sndu_remain, (int)ts_remain);
592 memcpy(skb_put(priv->ule_skb, how_much), from_where, how_much);
593 priv->ule_sndu_remain -= how_much;
594 ts_remain -= how_much;
595 from_where += how_much;
596
597 /* Check for complete payload. */
598 if (priv->ule_sndu_remain <= 0) {
599 /* Check CRC32, we've got it in our skb already. */
600 unsigned short ulen = htons(priv->ule_sndu_len);
601 unsigned short utype = htons(priv->ule_sndu_type);
602 struct kvec iov[3] = {
603 { &ulen, sizeof ulen },
604 { &utype, sizeof utype },
605 { priv->ule_skb->data, priv->ule_skb->len - 4 }
606 };
607 unsigned long ule_crc = ~0L, expected_crc;
608 if (priv->ule_dbit) {
609 /* Set D-bit for CRC32 verification,
610 * if it was set originally. */
611 ulen |= 0x0080;
612 }
613
614 ule_crc = iov_crc32(ule_crc, iov, 3);
615 expected_crc = *((u8 *)priv->ule_skb->tail - 4) << 24 |
616 *((u8 *)priv->ule_skb->tail - 3) << 16 |
617 *((u8 *)priv->ule_skb->tail - 2) << 8 |
618 *((u8 *)priv->ule_skb->tail - 1);
619 if (ule_crc != expected_crc) {
620 printk(KERN_WARNING "%lu: CRC32 check FAILED: %#lx / %#lx, SNDU len %d type %#x, ts_remain %d, next 2: %x.\n",
621 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);
622
623 #ifdef ULE_DEBUG
624 hexdump( iov[0].iov_base, iov[0].iov_len );
625 hexdump( iov[1].iov_base, iov[1].iov_len );
626 hexdump( iov[2].iov_base, iov[2].iov_len );
627
628 if (ule_where == ule_hist) {
629 hexdump( &ule_hist[98*TS_SZ], TS_SZ );
630 hexdump( &ule_hist[99*TS_SZ], TS_SZ );
631 } else if (ule_where == &ule_hist[TS_SZ]) {
632 hexdump( &ule_hist[99*TS_SZ], TS_SZ );
633 hexdump( ule_hist, TS_SZ );
634 } else {
635 hexdump( ule_where - TS_SZ - TS_SZ, TS_SZ );
636 hexdump( ule_where - TS_SZ, TS_SZ );
637 }
638 ule_dump = 1;
639 #endif
640
641 priv->stats.rx_errors++;
642 priv->stats.rx_crc_errors++;
643 dev_kfree_skb(priv->ule_skb);
644 } else {
645 /* CRC32 verified OK. */
646 u8 dest_addr[ETH_ALEN];
647 static const u8 bc_addr[ETH_ALEN] =
648 { [ 0 ... ETH_ALEN-1] = 0xff };
649
650 /* CRC32 was OK. Remove it from skb. */
651 priv->ule_skb->tail -= 4;
652 priv->ule_skb->len -= 4;
653
654 if (!priv->ule_dbit) {
655 /*
656 * The destination MAC address is the
657 * next data in the skb. It comes
658 * before any extension headers.
659 *
660 * Check if the payload of this SNDU
661 * should be passed up the stack.
662 */
663 register int drop = 0;
664 if (priv->rx_mode != RX_MODE_PROMISC) {
665 if (priv->ule_skb->data[0] & 0x01) {
666 /* multicast or broadcast */
667 if (memcmp(priv->ule_skb->data, bc_addr, ETH_ALEN)) {
668 /* multicast */
669 if (priv->rx_mode == RX_MODE_MULTI) {
670 int i;
671 for(i = 0; i < priv->multi_num && memcmp(priv->ule_skb->data, priv->multi_macs[i], ETH_ALEN); i++)
672 ;
673 if (i == priv->multi_num)
674 drop = 1;
675 } else if (priv->rx_mode != RX_MODE_ALL_MULTI)
676 drop = 1; /* no broadcast; */
677 /* else: all multicast mode: accept all multicast packets */
678 }
679 /* else: broadcast */
680 }
681 else if (memcmp(priv->ule_skb->data, dev->dev_addr, ETH_ALEN))
682 drop = 1;
683 /* else: destination address matches the MAC address of our receiver device */
684 }
685 /* else: promiscious mode; pass everything up the stack */
686
687 if (drop) {
688 #ifdef ULE_DEBUG
689 dprintk("Dropping SNDU: MAC destination address does not match: dest addr: "MAC_ADDR_PRINTFMT", dev addr: "MAC_ADDR_PRINTFMT"\n",
690 MAX_ADDR_PRINTFMT_ARGS(priv->ule_skb->data), MAX_ADDR_PRINTFMT_ARGS(dev->dev_addr));
691 #endif
692 dev_kfree_skb(priv->ule_skb);
693 goto sndu_done;
694 }
695 else
696 {
697 memcpy(dest_addr, priv->ule_skb->data, ETH_ALEN);
698 skb_pull(priv->ule_skb, ETH_ALEN);
699 }
700 }
701
702 /* Handle ULE Extension Headers. */
703 if (priv->ule_sndu_type < 1536) {
704 /* There is an extension header. Handle it accordingly. */
705 int l = handle_ule_extensions(priv);
706 if (l < 0) {
707 /* Mandatory extension header unknown or TEST SNDU. Drop it. */
708 // printk( KERN_WARNING "Dropping SNDU, extension headers.\n" );
709 dev_kfree_skb(priv->ule_skb);
710 goto sndu_done;
711 }
712 skb_pull(priv->ule_skb, l);
713 }
714
715 /*
716 * Construct/assure correct ethernet header.
717 * Note: in bridged mode (priv->ule_bridged !=
718 * 0) we already have the (original) ethernet
719 * header at the start of the payload (after
720 * optional dest. address and any extension
721 * headers).
722 */
723
724 if (!priv->ule_bridged) {
725 skb_push(priv->ule_skb, ETH_HLEN);
726 ethh = (struct ethhdr *)priv->ule_skb->data;
727 if (!priv->ule_dbit) {
728 /* dest_addr buffer is only valid if priv->ule_dbit == 0 */
729 memcpy(ethh->h_dest, dest_addr, ETH_ALEN);
730 memset(ethh->h_source, 0, ETH_ALEN);
731 }
732 else /* zeroize source and dest */
733 memset( ethh, 0, ETH_ALEN*2 );
734
735 ethh->h_proto = htons(priv->ule_sndu_type);
736 }
737 /* else: skb is in correct state; nothing to do. */
738 priv->ule_bridged = 0;
739
740 /* Stuff into kernel's protocol stack. */
741 priv->ule_skb->protocol = dvb_net_eth_type_trans(priv->ule_skb, dev);
742 /* If D-bit is set (i.e. destination MAC address not present),
743 * receive the packet anyhow. */
744 /* if (priv->ule_dbit && skb->pkt_type == PACKET_OTHERHOST)
745 priv->ule_skb->pkt_type = PACKET_HOST; */
746 priv->stats.rx_packets++;
747 priv->stats.rx_bytes += priv->ule_skb->len;
748 netif_rx(priv->ule_skb);
749 }
750 sndu_done:
751 /* Prepare for next SNDU. */
752 reset_ule(priv);
753 }
754
755 /* More data in current TS (look at the bytes following the CRC32)? */
756 if (ts_remain >= 2 && *((unsigned short *)from_where) != 0xFFFF) {
757 /* Next ULE SNDU starts right there. */
758 new_ts = 0;
759 priv->ule_skb = NULL;
760 priv->ule_sndu_type_1 = 0;
761 priv->ule_sndu_len = 0;
762 // printk(KERN_WARNING "More data in current TS: [%#x %#x %#x %#x]\n",
763 // *(from_where + 0), *(from_where + 1),
764 // *(from_where + 2), *(from_where + 3));
765 // printk(KERN_WARNING "ts @ %p, stopped @ %p:\n", ts, from_where + 0);
766 // hexdump(ts, 188);
767 } else {
768 new_ts = 1;
769 ts += TS_SZ;
770 priv->ts_count++;
771 if (priv->ule_skb == NULL) {
772 priv->need_pusi = 1;
773 priv->ule_sndu_type_1 = 0;
774 priv->ule_sndu_len = 0;
775 }
776 }
777 } /* for all available TS cells */
778 }
779
780 static int dvb_net_ts_callback(const u8 *buffer1, size_t buffer1_len,
781 const u8 *buffer2, size_t buffer2_len,
782 struct dmx_ts_feed *feed, enum dmx_success success)
783 {
784 struct net_device *dev = feed->priv;
785
786 if (buffer2 != 0)
787 printk(KERN_WARNING "buffer2 not 0: %p.\n", buffer2);
788 if (buffer1_len > 32768)
789 printk(KERN_WARNING "length > 32k: %zu.\n", buffer1_len);
790 /* printk("TS callback: %u bytes, %u TS cells @ %p.\n",
791 buffer1_len, buffer1_len / TS_SZ, buffer1); */
792 dvb_net_ule(dev, buffer1, buffer1_len);
793 return 0;
794 }
795
796
797 static void dvb_net_sec(struct net_device *dev, u8 *pkt, int pkt_len)
798 {
799 u8 *eth;
800 struct sk_buff *skb;
801 struct net_device_stats *stats = &(((struct dvb_net_priv *) dev->priv)->stats);
802 int snap = 0;
803
804 /* note: pkt_len includes a 32bit checksum */
805 if (pkt_len < 16) {
806 printk("%s: IP/MPE packet length = %d too small.\n",
807 dev->name, pkt_len);
808 stats->rx_errors++;
809 stats->rx_length_errors++;
810 return;
811 }
812 /* it seems some ISPs manage to screw up here, so we have to
813 * relax the error checks... */
814 #if 0
815 if ((pkt[5] & 0xfd) != 0xc1) {
816 /* drop scrambled or broken packets */
817 #else
818 if ((pkt[5] & 0x3c) != 0x00) {
819 /* drop scrambled */
820 #endif
821 stats->rx_errors++;
822 stats->rx_crc_errors++;
823 return;
824 }
825 if (pkt[5] & 0x02) {
826 /* handle LLC/SNAP, see rfc-1042 */
827 if (pkt_len < 24 || memcmp(&pkt[12], "\xaa\xaa\x03\0\0\0", 6)) {
828 stats->rx_dropped++;
829 return;
830 }
831 snap = 8;
832 }
833 if (pkt[7]) {
834 /* FIXME: assemble datagram from multiple sections */
835 stats->rx_errors++;
836 stats->rx_frame_errors++;
837 return;
838 }
839
840 /* we have 14 byte ethernet header (ip header follows);
841 * 12 byte MPE header; 4 byte checksum; + 2 byte alignment, 8 byte LLC/SNAP
842 */
843 if (!(skb = dev_alloc_skb(pkt_len - 4 - 12 + 14 + 2 - snap))) {
844 //printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n", dev->name);
845 stats->rx_dropped++;
846 return;
847 }
848 skb_reserve(skb, 2); /* longword align L3 header */
849 skb->dev = dev;
850
851 /* copy L3 payload */
852 eth = (u8 *) skb_put(skb, pkt_len - 12 - 4 + 14 - snap);
853 memcpy(eth + 14, pkt + 12 + snap, pkt_len - 12 - 4 - snap);
854
855 /* create ethernet header: */
856 eth[0]=pkt[0x0b];
857 eth[1]=pkt[0x0a];
858 eth[2]=pkt[0x09];
859 eth[3]=pkt[0x08];
860 eth[4]=pkt[0x04];
861 eth[5]=pkt[0x03];
862
863 eth[6]=eth[7]=eth[8]=eth[9]=eth[10]=eth[11]=0;
864
865 if (snap) {
866 eth[12] = pkt[18];
867 eth[13] = pkt[19];
868 } else {
869 /* protocol numbers are from rfc-1700 or
870 * http://www.iana.org/assignments/ethernet-numbers
871 */
872 if (pkt[12] >> 4 == 6) { /* version field from IP header */
873 eth[12] = 0x86; /* IPv6 */
874 eth[13] = 0xdd;
875 } else {
876 eth[12] = 0x08; /* IPv4 */
877 eth[13] = 0x00;
878 }
879 }
880
881 skb->protocol = dvb_net_eth_type_trans(skb, dev);
882
883 stats->rx_packets++;
884 stats->rx_bytes+=skb->len;
885 netif_rx(skb);
886 }
887
888 static int dvb_net_sec_callback(const u8 *buffer1, size_t buffer1_len,
889 const u8 *buffer2, size_t buffer2_len,
890 struct dmx_section_filter *filter,
891 enum dmx_success success)
892 {
893 struct net_device *dev = filter->priv;
894
895 /**
896 * we rely on the DVB API definition where exactly one complete
897 * section is delivered in buffer1
898 */
899 dvb_net_sec (dev, (u8*) buffer1, buffer1_len);
900 return 0;
901 }
902
903 static int dvb_net_tx(struct sk_buff *skb, struct net_device *dev)
904 {
905 dev_kfree_skb(skb);
906 return 0;
907 }
908
909 static u8 mask_normal[6]={0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
910 static u8 mask_allmulti[6]={0xff, 0xff, 0xff, 0x00, 0x00, 0x00};
911 static u8 mac_allmulti[6]={0x01, 0x00, 0x5e, 0x00, 0x00, 0x00};
912 static u8 mask_promisc[6]={0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
913
914 static int dvb_net_filter_sec_set(struct net_device *dev,
915 struct dmx_section_filter **secfilter,
916 u8 *mac, u8 *mac_mask)
917 {
918 struct dvb_net_priv *priv = dev->priv;
919 int ret;
920
921 *secfilter=NULL;
922 ret = priv->secfeed->allocate_filter(priv->secfeed, secfilter);
923 if (ret<0) {
924 printk("%s: could not get filter\n", dev->name);
925 return ret;
926 }
927
928 (*secfilter)->priv=(void *) dev;
929
930 memset((*secfilter)->filter_value, 0x00, DMX_MAX_FILTER_SIZE);
931 memset((*secfilter)->filter_mask, 0x00, DMX_MAX_FILTER_SIZE);
932 memset((*secfilter)->filter_mode, 0xff, DMX_MAX_FILTER_SIZE);
933
934 (*secfilter)->filter_value[0]=0x3e;
935 (*secfilter)->filter_value[3]=mac[5];
936 (*secfilter)->filter_value[4]=mac[4];
937 (*secfilter)->filter_value[8]=mac[3];
938 (*secfilter)->filter_value[9]=mac[2];
939 (*secfilter)->filter_value[10]=mac[1];
940 (*secfilter)->filter_value[11]=mac[0];
941
942 (*secfilter)->filter_mask[0] = 0xff;
943 (*secfilter)->filter_mask[3] = mac_mask[5];
944 (*secfilter)->filter_mask[4] = mac_mask[4];
945 (*secfilter)->filter_mask[8] = mac_mask[3];
946 (*secfilter)->filter_mask[9] = mac_mask[2];
947 (*secfilter)->filter_mask[10] = mac_mask[1];
948 (*secfilter)->filter_mask[11]=mac_mask[0];
949
950 dprintk("%s: filter mac=%02x %02x %02x %02x %02x %02x\n",
951 dev->name, mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
952 dprintk("%s: filter mask=%02x %02x %02x %02x %02x %02x\n",
953 dev->name, mac_mask[0], mac_mask[1], mac_mask[2],
954 mac_mask[3], mac_mask[4], mac_mask[5]);
955
956 return 0;
957 }
958
959 static int dvb_net_feed_start(struct net_device *dev)
960 {
961 int ret = 0, i;
962 struct dvb_net_priv *priv = dev->priv;
963 struct dmx_demux *demux = priv->demux;
964 unsigned char *mac = (unsigned char *) dev->dev_addr;
965
966 dprintk("%s: rx_mode %i\n", __FUNCTION__, priv->rx_mode);
967 mutex_lock(&priv->mutex);
968 if (priv->tsfeed || priv->secfeed || priv->secfilter || priv->multi_secfilter[0])
969 printk("%s: BUG %d\n", __FUNCTION__, __LINE__);
970
971 priv->secfeed=NULL;
972 priv->secfilter=NULL;
973 priv->tsfeed = NULL;
974
975 if (priv->feedtype == DVB_NET_FEEDTYPE_MPE) {
976 dprintk("%s: alloc secfeed\n", __FUNCTION__);
977 ret=demux->allocate_section_feed(demux, &priv->secfeed,
978 dvb_net_sec_callback);
979 if (ret<0) {
980 printk("%s: could not allocate section feed\n", dev->name);
981 goto error;
982 }
983
984 ret = priv->secfeed->set(priv->secfeed, priv->pid, 32768, 1);
985
986 if (ret<0) {
987 printk("%s: could not set section feed\n", dev->name);
988 priv->demux->release_section_feed(priv->demux, priv->secfeed);
989 priv->secfeed=NULL;
990 goto error;
991 }
992
993 if (priv->rx_mode != RX_MODE_PROMISC) {
994 dprintk("%s: set secfilter\n", __FUNCTION__);
995 dvb_net_filter_sec_set(dev, &priv->secfilter, mac, mask_normal);
996 }
997
998 switch (priv->rx_mode) {
999 case RX_MODE_MULTI:
1000 for (i = 0; i < priv->multi_num; i++) {
1001 dprintk("%s: set multi_secfilter[%d]\n", __FUNCTION__, i);
1002 dvb_net_filter_sec_set(dev, &priv->multi_secfilter[i],
1003 priv->multi_macs[i], mask_normal);
1004 }
1005 break;
1006 case RX_MODE_ALL_MULTI:
1007 priv->multi_num=1;
1008 dprintk("%s: set multi_secfilter[0]\n", __FUNCTION__);
1009 dvb_net_filter_sec_set(dev, &priv->multi_secfilter[0],
1010 mac_allmulti, mask_allmulti);
1011 break;
1012 case RX_MODE_PROMISC:
1013 priv->multi_num=0;
1014 dprintk("%s: set secfilter\n", __FUNCTION__);
1015 dvb_net_filter_sec_set(dev, &priv->secfilter, mac, mask_promisc);
1016 break;
1017 }
1018
1019 dprintk("%s: start filtering\n", __FUNCTION__);
1020 priv->secfeed->start_filtering(priv->secfeed);
1021 } else if (priv->feedtype == DVB_NET_FEEDTYPE_ULE) {
1022 struct timespec timeout = { 0, 10000000 }; // 10 msec
1023
1024 /* we have payloads encapsulated in TS */
1025 dprintk("%s: alloc tsfeed\n", __FUNCTION__);
1026 ret = demux->allocate_ts_feed(demux, &priv->tsfeed, dvb_net_ts_callback);
1027 if (ret < 0) {
1028 printk("%s: could not allocate ts feed\n", dev->name);
1029 goto error;
1030 }
1031
1032 /* Set netdevice pointer for ts decaps callback. */
1033 priv->tsfeed->priv = (void *)dev;
1034 ret = priv->tsfeed->set(priv->tsfeed,
1035 priv->pid, /* pid */
1036 TS_PACKET, /* type */
1037 DMX_TS_PES_OTHER, /* pes type */
1038 32768, /* circular buffer size */
1039 timeout /* timeout */
1040 );
1041
1042 if (ret < 0) {
1043 printk("%s: could not set ts feed\n", dev->name);
1044 priv->demux->release_ts_feed(priv->demux, priv->tsfeed);
1045 priv->tsfeed = NULL;
1046 goto error;
1047 }
1048
1049 dprintk("%s: start filtering\n", __FUNCTION__);
1050 priv->tsfeed->start_filtering(priv->tsfeed);
1051 } else
1052 ret = -EINVAL;
1053
1054 error:
1055 mutex_unlock(&priv->mutex);
1056 return ret;
1057 }
1058
1059 static int dvb_net_feed_stop(struct net_device *dev)
1060 {
1061 struct dvb_net_priv *priv = dev->priv;
1062 int i, ret = 0;
1063
1064 dprintk("%s\n", __FUNCTION__);
1065 mutex_lock(&priv->mutex);
1066 if (priv->feedtype == DVB_NET_FEEDTYPE_MPE) {
1067 if (priv->secfeed) {
1068 if (priv->secfeed->is_filtering) {
1069 dprintk("%s: stop secfeed\n", __FUNCTION__);
1070 priv->secfeed->stop_filtering(priv->secfeed);
1071 }
1072
1073 if (priv->secfilter) {
1074 dprintk("%s: release secfilter\n", __FUNCTION__);
1075 priv->secfeed->release_filter(priv->secfeed,
1076 priv->secfilter);
1077 priv->secfilter=NULL;
1078 }
1079
1080 for (i=0; i<priv->multi_num; i++) {
1081 if (priv->multi_secfilter[i]) {
1082 dprintk("%s: release multi_filter[%d]\n",
1083 __FUNCTION__, i);
1084 priv->secfeed->release_filter(priv->secfeed,
1085 priv->multi_secfilter[i]);
1086 priv->multi_secfilter[i] = NULL;
1087 }
1088 }
1089
1090 priv->demux->release_section_feed(priv->demux, priv->secfeed);
1091 priv->secfeed = NULL;
1092 } else
1093 printk("%s: no feed to stop\n", dev->name);
1094 } else if (priv->feedtype == DVB_NET_FEEDTYPE_ULE) {
1095 if (priv->tsfeed) {
1096 if (priv->tsfeed->is_filtering) {
1097 dprintk("%s: stop tsfeed\n", __FUNCTION__);
1098 priv->tsfeed->stop_filtering(priv->tsfeed);
1099 }
1100 priv->demux->release_ts_feed(priv->demux, priv->tsfeed);
1101 priv->tsfeed = NULL;
1102 }
1103 else
1104 printk("%s: no ts feed to stop\n", dev->name);
1105 } else
1106 ret = -EINVAL;
1107 mutex_unlock(&priv->mutex);
1108 return ret;
1109 }
1110
1111
1112 static int dvb_set_mc_filter (struct net_device *dev, struct dev_mc_list *mc)
1113 {
1114 struct dvb_net_priv *priv = dev->priv;
1115
1116 if (priv->multi_num == DVB_NET_MULTICAST_MAX)
1117 return -ENOMEM;
1118
1119 memcpy(priv->multi_macs[priv->multi_num], mc->dmi_addr, 6);
1120
1121 priv->multi_num++;
1122 return 0;
1123 }
1124
1125
1126 static void wq_set_multicast_list (void *data)
1127 {
1128 struct net_device *dev = data;
1129 struct dvb_net_priv *priv = dev->priv;
1130
1131 dvb_net_feed_stop(dev);
1132 priv->rx_mode = RX_MODE_UNI;
1133 netif_tx_lock_bh(dev);
1134
1135 if (dev->flags & IFF_PROMISC) {
1136 dprintk("%s: promiscuous mode\n", dev->name);
1137 priv->rx_mode = RX_MODE_PROMISC;
1138 } else if ((dev->flags & IFF_ALLMULTI)) {
1139 dprintk("%s: allmulti mode\n", dev->name);
1140 priv->rx_mode = RX_MODE_ALL_MULTI;
1141 } else if (dev->mc_count) {
1142 int mci;
1143 struct dev_mc_list *mc;
1144
1145 dprintk("%s: set_mc_list, %d entries\n",
1146 dev->name, dev->mc_count);
1147
1148 priv->rx_mode = RX_MODE_MULTI;
1149 priv->multi_num = 0;
1150
1151 for (mci = 0, mc=dev->mc_list;
1152 mci < dev->mc_count;
1153 mc = mc->next, mci++) {
1154 dvb_set_mc_filter(dev, mc);
1155 }
1156 }
1157
1158 netif_tx_unlock_bh(dev);
1159 dvb_net_feed_start(dev);
1160 }
1161
1162
1163 static void dvb_net_set_multicast_list (struct net_device *dev)
1164 {
1165 struct dvb_net_priv *priv = dev->priv;
1166 schedule_work(&priv->set_multicast_list_wq);
1167 }
1168
1169
1170 static void wq_restart_net_feed (void *data)
1171 {
1172 struct net_device *dev = data;
1173
1174 if (netif_running(dev)) {
1175 dvb_net_feed_stop(dev);
1176 dvb_net_feed_start(dev);
1177 }
1178 }
1179
1180
1181 static int dvb_net_set_mac (struct net_device *dev, void *p)
1182 {
1183 struct dvb_net_priv *priv = dev->priv;
1184 struct sockaddr *addr=p;
1185
1186 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1187
1188 if (netif_running(dev))
1189 schedule_work(&priv->restart_net_feed_wq);
1190
1191 return 0;
1192 }
1193
1194
1195 static int dvb_net_open(struct net_device *dev)
1196 {
1197 struct dvb_net_priv *priv = dev->priv;
1198
1199 priv->in_use++;
1200 dvb_net_feed_start(dev);
1201 return 0;
1202 }
1203
1204
1205 static int dvb_net_stop(struct net_device *dev)
1206 {
1207 struct dvb_net_priv *priv = dev->priv;
1208
1209 priv->in_use--;
1210 return dvb_net_feed_stop(dev);
1211 }
1212
1213 static struct net_device_stats * dvb_net_get_stats(struct net_device *dev)
1214 {
1215 return &((struct dvb_net_priv*) dev->priv)->stats;
1216 }
1217
1218 static void dvb_net_setup(struct net_device *dev)
1219 {
1220 ether_setup(dev);
1221
1222 dev->open = dvb_net_open;
1223 dev->stop = dvb_net_stop;
1224 dev->hard_start_xmit = dvb_net_tx;
1225 dev->get_stats = dvb_net_get_stats;
1226 dev->set_multicast_list = dvb_net_set_multicast_list;
1227 dev->set_mac_address = dvb_net_set_mac;
1228 dev->mtu = 4096;
1229 dev->mc_count = 0;
1230 dev->hard_header_cache = NULL;
1231 dev->flags |= IFF_NOARP;
1232 }
1233
1234 static int get_if(struct dvb_net *dvbnet)
1235 {
1236 int i;
1237
1238 for (i=0; i<DVB_NET_DEVICES_MAX; i++)
1239 if (!dvbnet->state[i])
1240 break;
1241
1242 if (i == DVB_NET_DEVICES_MAX)
1243 return -1;
1244
1245 dvbnet->state[i]=1;
1246 return i;
1247 }
1248
1249 static int dvb_net_add_if(struct dvb_net *dvbnet, u16 pid, u8 feedtype)
1250 {
1251 struct net_device *net;
1252 struct dvb_net_priv *priv;
1253 int result;
1254 int if_num;
1255
1256 if (feedtype != DVB_NET_FEEDTYPE_MPE && feedtype != DVB_NET_FEEDTYPE_ULE)
1257 return -EINVAL;
1258 if ((if_num = get_if(dvbnet)) < 0)
1259 return -EINVAL;
1260
1261 net = alloc_netdev(sizeof(struct dvb_net_priv), "dvb", dvb_net_setup);
1262 if (!net)
1263 return -ENOMEM;
1264
1265 if (dvbnet->dvbdev->id)
1266 snprintf(net->name, IFNAMSIZ, "dvb%d%u%d",
1267 dvbnet->dvbdev->adapter->num, dvbnet->dvbdev->id, if_num);
1268 else
1269 /* compatibility fix to keep dvb0_0 format */
1270 snprintf(net->name, IFNAMSIZ, "dvb%d_%d",
1271 dvbnet->dvbdev->adapter->num, if_num);
1272
1273 net->addr_len = 6;
1274 memcpy(net->dev_addr, dvbnet->dvbdev->adapter->proposed_mac, 6);
1275
1276 dvbnet->device[if_num] = net;
1277
1278 priv = net->priv;
1279 priv->demux = dvbnet->demux;
1280 priv->pid = pid;
1281 priv->rx_mode = RX_MODE_UNI;
1282 priv->need_pusi = 1;
1283 priv->tscc = 0;
1284 priv->feedtype = feedtype;
1285 reset_ule(priv);
1286
1287 INIT_WORK(&priv->set_multicast_list_wq, wq_set_multicast_list, net);
1288 INIT_WORK(&priv->restart_net_feed_wq, wq_restart_net_feed, net);
1289 mutex_init(&priv->mutex);
1290
1291 net->base_addr = pid;
1292
1293 if ((result = register_netdev(net)) < 0) {
1294 dvbnet->device[if_num] = NULL;
1295 free_netdev(net);
1296 return result;
1297 }
1298 printk("dvb_net: created network interface %s\n", net->name);
1299
1300 return if_num;
1301 }
1302
1303 static int dvb_net_remove_if(struct dvb_net *dvbnet, unsigned long num)
1304 {
1305 struct net_device *net = dvbnet->device[num];
1306 struct dvb_net_priv *priv;
1307
1308 if (!dvbnet->state[num])
1309 return -EINVAL;
1310 priv = net->priv;
1311 if (priv->in_use)
1312 return -EBUSY;
1313
1314 dvb_net_stop(net);
1315 flush_scheduled_work();
1316 printk("dvb_net: removed network interface %s\n", net->name);
1317 unregister_netdev(net);
1318 dvbnet->state[num]=0;
1319 dvbnet->device[num] = NULL;
1320 free_netdev(net);
1321
1322 return 0;
1323 }
1324
1325 static int dvb_net_do_ioctl(struct inode *inode, struct file *file,
1326 unsigned int cmd, void *parg)
1327 {
1328 struct dvb_device *dvbdev = file->private_data;
1329 struct dvb_net *dvbnet = dvbdev->priv;
1330
1331 if (((file->f_flags&O_ACCMODE)==O_RDONLY))
1332 return -EPERM;
1333
1334 switch (cmd) {
1335 case NET_ADD_IF:
1336 {
1337 struct dvb_net_if *dvbnetif = parg;
1338 int result;
1339
1340 if (!capable(CAP_SYS_ADMIN))
1341 return -EPERM;
1342
1343 if (!try_module_get(dvbdev->adapter->module))
1344 return -EPERM;
1345
1346 result=dvb_net_add_if(dvbnet, dvbnetif->pid, dvbnetif->feedtype);
1347 if (result<0) {
1348 module_put(dvbdev->adapter->module);
1349 return result;
1350 }
1351 dvbnetif->if_num=result;
1352 break;
1353 }
1354 case NET_GET_IF:
1355 {
1356 struct net_device *netdev;
1357 struct dvb_net_priv *priv_data;
1358 struct dvb_net_if *dvbnetif = parg;
1359
1360 if (dvbnetif->if_num >= DVB_NET_DEVICES_MAX ||
1361 !dvbnet->state[dvbnetif->if_num])
1362 return -EINVAL;
1363
1364 netdev = dvbnet->device[dvbnetif->if_num];
1365
1366 priv_data = netdev->priv;
1367 dvbnetif->pid=priv_data->pid;
1368 dvbnetif->feedtype=priv_data->feedtype;
1369 break;
1370 }
1371 case NET_REMOVE_IF:
1372 {
1373 int ret;
1374
1375 if (!capable(CAP_SYS_ADMIN))
1376 return -EPERM;
1377 if ((unsigned long) parg >= DVB_NET_DEVICES_MAX)
1378 return -EINVAL;
1379 ret = dvb_net_remove_if(dvbnet, (unsigned long) parg);
1380 if (!ret)
1381 module_put(dvbdev->adapter->module);
1382 return ret;
1383 }
1384
1385 /* binary compatiblity cruft */
1386 case __NET_ADD_IF_OLD:
1387 {
1388 struct __dvb_net_if_old *dvbnetif = parg;
1389 int result;
1390
1391 if (!capable(CAP_SYS_ADMIN))
1392 return -EPERM;
1393
1394 if (!try_module_get(dvbdev->adapter->module))
1395 return -EPERM;
1396
1397 result=dvb_net_add_if(dvbnet, dvbnetif->pid, DVB_NET_FEEDTYPE_MPE);
1398 if (result<0) {
1399 module_put(dvbdev->adapter->module);
1400 return result;
1401 }
1402 dvbnetif->if_num=result;
1403 break;
1404 }
1405 case __NET_GET_IF_OLD:
1406 {
1407 struct net_device *netdev;
1408 struct dvb_net_priv *priv_data;
1409 struct __dvb_net_if_old *dvbnetif = parg;
1410
1411 if (dvbnetif->if_num >= DVB_NET_DEVICES_MAX ||
1412 !dvbnet->state[dvbnetif->if_num])
1413 return -EINVAL;
1414
1415 netdev = dvbnet->device[dvbnetif->if_num];
1416
1417 priv_data = netdev->priv;
1418 dvbnetif->pid=priv_data->pid;
1419 break;
1420 }
1421 default:
1422 return -ENOTTY;
1423 }
1424 return 0;
1425 }
1426
1427 static int dvb_net_ioctl(struct inode *inode, struct file *file,
1428 unsigned int cmd, unsigned long arg)
1429 {
1430 return dvb_usercopy(inode, file, cmd, arg, dvb_net_do_ioctl);
1431 }
1432
1433 static struct file_operations dvb_net_fops = {
1434 .owner = THIS_MODULE,
1435 .ioctl = dvb_net_ioctl,
1436 .open = dvb_generic_open,
1437 .release = dvb_generic_release,
1438 };
1439
1440 static struct dvb_device dvbdev_net = {
1441 .priv = NULL,
1442 .users = 1,
1443 .writers = 1,
1444 .fops = &dvb_net_fops,
1445 };
1446
1447
1448 void dvb_net_release (struct dvb_net *dvbnet)
1449 {
1450 int i;
1451
1452 dvb_unregister_device(dvbnet->dvbdev);
1453
1454 for (i=0; i<DVB_NET_DEVICES_MAX; i++) {
1455 if (!dvbnet->state[i])
1456 continue;
1457 dvb_net_remove_if(dvbnet, i);
1458 }
1459 }
1460 EXPORT_SYMBOL(dvb_net_release);
1461
1462
1463 int dvb_net_init (struct dvb_adapter *adap, struct dvb_net *dvbnet,
1464 struct dmx_demux *dmx)
1465 {
1466 int i;
1467
1468 dvbnet->demux = dmx;
1469
1470 for (i=0; i<DVB_NET_DEVICES_MAX; i++)
1471 dvbnet->state[i] = 0;
1472
1473 dvb_register_device (adap, &dvbnet->dvbdev, &dvbdev_net,
1474 dvbnet, DVB_DEVICE_NET);
1475
1476 return 0;
1477 }
1478 EXPORT_SYMBOL(dvb_net_init);
Linux kernel - Deliverables
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