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[XFRM]: skb_cow_data() does not set proper owner for new skbs.
[linux-2.6/verdex.git] / drivers / media / dvb / dvb-core / dvb_net.c
blob6a968c346a367d9595bfbfc979b8203aebc3051e
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 draft-ietf-ipdvb-ule-03.txt.
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 */
46
47 /*
48 * FIXME / TODO (dvb_net.c):
49 *
50 * Unloading does not work for 2.6.9 kernels: a refcount doesn't go to zero.
51 *
52 * TS_FEED callback is called once for every single TS cell although it is
53 * registered (in dvb_net_feed_start()) for 100 TS cells (used for dvb_net_ule()).
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/version.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 isprint(c) ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || (c >= '0' && c <= '9'))
93
94 static void hexdump( const unsigned char *buf, unsigned short len )
95 {
96 char str[80], octet[10];
97 int ofs, i, l;
98
99 for (ofs = 0; ofs < len; ofs += 16) {
100 sprintf( str, "%03d: ", ofs );
101
102 for (i = 0; i < 16; i++) {
103 if ((i + ofs) < len)
104 sprintf( octet, "%02x ", buf[ofs + i] );
105 else
106 strcpy( octet, " " );
107
108 strcat( str, octet );
109 }
110 strcat( str, " " );
111 l = strlen( str );
112
113 for (i = 0; (i < 16) && ((i + ofs) < len); i++)
114 str[l++] = isprint( buf[ofs + i] ) ? buf[ofs + i] : '.';
115
116 str[l] = '\0';
117 printk( KERN_WARNING "%s\n", str );
118 }
119 }
120
121 #endif
122
123 struct dvb_net_priv {
124 int in_use;
125 struct net_device_stats stats;
126 u16 pid;
127 struct dvb_net *host;
128 struct dmx_demux *demux;
129 struct dmx_section_feed *secfeed;
130 struct dmx_section_filter *secfilter;
131 struct dmx_ts_feed *tsfeed;
132 int multi_num;
133 struct dmx_section_filter *multi_secfilter[DVB_NET_MULTICAST_MAX];
134 unsigned char multi_macs[DVB_NET_MULTICAST_MAX][6];
135 int rx_mode;
136 #define RX_MODE_UNI 0
137 #define RX_MODE_MULTI 1
138 #define RX_MODE_ALL_MULTI 2
139 #define RX_MODE_PROMISC 3
140 struct work_struct set_multicast_list_wq;
141 struct work_struct restart_net_feed_wq;
142 unsigned char feedtype; /* Either FEED_TYPE_ or FEED_TYPE_ULE */
143 int need_pusi; /* Set to 1, if synchronization on PUSI required. */
144 unsigned char tscc; /* TS continuity counter after sync on PUSI. */
145 struct sk_buff *ule_skb; /* ULE SNDU decodes into this buffer. */
146 unsigned char *ule_next_hdr; /* Pointer into skb to next ULE extension header. */
147 unsigned short ule_sndu_len; /* ULE SNDU length in bytes, w/o D-Bit. */
148 unsigned short ule_sndu_type; /* ULE SNDU type field, complete. */
149 unsigned char ule_sndu_type_1; /* ULE SNDU type field, if split across 2 TS cells. */
150 unsigned char ule_dbit; /* Whether the DestMAC address present
151 * or not (bit is set). */
152 unsigned char ule_bridged; /* Whether the ULE_BRIDGED extension header was found. */
153 int ule_sndu_remain; /* Nr. of bytes still required for current ULE SNDU. */
154 unsigned long ts_count; /* Current ts cell counter. */
155 };
156
157
158 /**
159 * Determine the packet's protocol ID. The rule here is that we
160 * assume 802.3 if the type field is short enough to be a length.
161 * This is normal practice and works for any 'now in use' protocol.
162 *
163 * stolen from eth.c out of the linux kernel, hacked for dvb-device
164 * by Michael Holzt <kju@debian.org>
165 */
166 static unsigned short dvb_net_eth_type_trans(struct sk_buff *skb,
167 struct net_device *dev)
168 {
169 struct ethhdr *eth;
170 unsigned char *rawp;
171
172 skb->mac.raw=skb->data;
173 skb_pull(skb,dev->hard_header_len);
174 #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,8)
175 eth = skb->mac.ethernet;
176 #else
177 eth = eth_hdr(skb);
178 #endif
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 static int ule_test_sndu( struct dvb_net_priv *p )
221 {
222 return -1;
223 }
224
225 static int ule_bridged_sndu( struct dvb_net_priv *p )
226 {
227 /* BRIDGE SNDU handling sucks in draft-ietf-ipdvb-ule-03.txt.
228 * This has to be the last extension header, otherwise it won't work.
229 * Blame the authors!
230 */
231 p->ule_bridged = 1;
232 return 0;
233 }
234
235
236 /** Handle ULE extension headers.
237 * Function is called after a successful CRC32 verification of an ULE SNDU to complete its decoding.
238 * Returns: >= 0: nr. of bytes consumed by next extension header
239 * -1: Mandatory extension header that is not recognized or TEST SNDU; discard.
240 */
241 static int handle_one_ule_extension( struct dvb_net_priv *p )
242 {
243 /* Table of mandatory extension header handlers. The header type is the index. */
244 static int (*ule_mandatory_ext_handlers[255])( struct dvb_net_priv *p ) =
245 { [0] = ule_test_sndu, [1] = ule_bridged_sndu, [2] = NULL, };
246
247 /* Table of optional extension header handlers. The header type is the index. */
248 static int (*ule_optional_ext_handlers[255])( struct dvb_net_priv *p ) = { NULL, };
249
250 int ext_len = 0;
251 unsigned char hlen = (p->ule_sndu_type & 0x0700) >> 8;
252 unsigned char htype = p->ule_sndu_type & 0x00FF;
253
254 /* Discriminate mandatory and optional extension headers. */
255 if (hlen == 0) {
256 /* Mandatory extension header */
257 if (ule_mandatory_ext_handlers[htype]) {
258 ext_len = ule_mandatory_ext_handlers[htype]( p );
259 p->ule_next_hdr += ext_len;
260 if (! p->ule_bridged) {
261 p->ule_sndu_type = ntohs( *(unsigned short *)p->ule_next_hdr );
262 p->ule_next_hdr += 2;
263 } else {
264 p->ule_sndu_type = ntohs( *(unsigned short *)(p->ule_next_hdr + ((p->ule_dbit ? 2 : 3) * ETH_ALEN)) );
265 /* This assures the extension handling loop will terminate. */
266 }
267 } else
268 ext_len = -1; /* SNDU has to be discarded. */
269 } else {
270 /* Optional extension header. Calculate the length. */
271 ext_len = hlen << 2;
272 /* Process the optional extension header according to its type. */
273 if (ule_optional_ext_handlers[htype])
274 (void)ule_optional_ext_handlers[htype]( p );
275 p->ule_next_hdr += ext_len;
276 p->ule_sndu_type = ntohs( *(unsigned short *)p->ule_next_hdr );
277 p->ule_next_hdr += 2;
278 }
279
280 return ext_len;
281 }
282
283 static int handle_ule_extensions( struct dvb_net_priv *p )
284 {
285 int total_ext_len = 0, l;
286
287 p->ule_next_hdr = p->ule_skb->data;
288 do {
289 l = handle_one_ule_extension( p );
290 if (l == -1) return -1; /* Stop extension header processing and discard SNDU. */
291 total_ext_len += l;
292
293 } while (p->ule_sndu_type < 1536);
294
295 return total_ext_len;
296 }
297
298
299 /** Prepare for a new ULE SNDU: reset the decoder state. */
300 static inline void reset_ule( struct dvb_net_priv *p )
301 {
302 p->ule_skb = NULL;
303 p->ule_next_hdr = NULL;
304 p->ule_sndu_len = 0;
305 p->ule_sndu_type = 0;
306 p->ule_sndu_type_1 = 0;
307 p->ule_sndu_remain = 0;
308 p->ule_dbit = 0xFF;
309 p->ule_bridged = 0;
310 }
311
312 /**
313 * Decode ULE SNDUs according to draft-ietf-ipdvb-ule-03.txt from a sequence of
314 * TS cells of a single PID.
315 */
316 static void dvb_net_ule( struct net_device *dev, const u8 *buf, size_t buf_len )
317 {
318 struct dvb_net_priv *priv = dev->priv;
319 unsigned long skipped = 0L;
320 u8 *ts, *ts_end, *from_where = NULL, ts_remain = 0, how_much = 0, new_ts = 1;
321 struct ethhdr *ethh = NULL;
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 = 0;
327 #endif
328
329 if (dev == NULL) {
330 printk( KERN_ERR "NO netdev struct!\n" );
331 return;
332 }
333
334 /* For all TS cells in current buffer.
335 * Appearently, we are called for every single TS cell.
336 */
337 for (ts = (char *)buf, ts_end = (char *)buf + buf_len; ts < ts_end; /* no default incr. */ ) {
338
339 if (new_ts) {
340 /* We are about to process a new TS cell. */
341
342 #ifdef ULE_DEBUG
343 if (ule_where >= &ule_hist[100*TS_SZ]) ule_where = ule_hist;
344 memcpy( ule_where, ts, TS_SZ );
345 if (ule_dump) {
346 hexdump( ule_where, TS_SZ );
347 ule_dump = 0;
348 }
349 ule_where += TS_SZ;
350 #endif
351
352 /* Check TS error conditions: sync_byte, transport_error_indicator, scrambling_control . */
353 if ((ts[0] != TS_SYNC) || (ts[1] & TS_TEI) || ((ts[3] & TS_SC) != 0)) {
354 printk(KERN_WARNING "%lu: Invalid TS cell: SYNC %#x, TEI %u, SC %#x.\n",
355 priv->ts_count, ts[0], ts[1] & TS_TEI >> 7, ts[3] & 0xC0 >> 6);
356
357 /* Drop partly decoded SNDU, reset state, resync on PUSI. */
358 if (priv->ule_skb) {
359 dev_kfree_skb( priv->ule_skb );
360 /* Prepare for next SNDU. */
361 ((struct dvb_net_priv *) dev->priv)->stats.rx_errors++;
362 ((struct dvb_net_priv *) dev->priv)->stats.rx_frame_errors++;
363 }
364 reset_ule(priv);
365 priv->need_pusi = 1;
366
367 /* Continue with next TS cell. */
368 ts += TS_SZ;
369 priv->ts_count++;
370 continue;
371 }
372
373 ts_remain = 184;
374 from_where = ts + 4;
375 }
376 /* Synchronize on PUSI, if required. */
377 if (priv->need_pusi) {
378 if (ts[1] & TS_PUSI) {
379 /* Find beginning of first ULE SNDU in current TS cell. */
380 /* Synchronize continuity counter. */
381 priv->tscc = ts[3] & 0x0F;
382 /* There is a pointer field here. */
383 if (ts[4] > ts_remain) {
384 printk(KERN_ERR "%lu: Invalid ULE packet "
385 "(pointer field %d)\n", priv->ts_count, ts[4]);
386 ts += TS_SZ;
387 priv->ts_count++;
388 continue;
389 }
390 /* Skip to destination of pointer field. */
391 from_where = &ts[5] + ts[4];
392 ts_remain -= 1 + ts[4];
393 skipped = 0;
394 } else {
395 skipped++;
396 ts += TS_SZ;
397 priv->ts_count++;
398 continue;
399 }
400 }
401
402 /* Check continuity counter. */
403 if (new_ts) {
404 if ((ts[3] & 0x0F) == priv->tscc)
405 priv->tscc = (priv->tscc + 1) & 0x0F;
406 else {
407 /* TS discontinuity handling: */
408 printk(KERN_WARNING "%lu: TS discontinuity: got %#x, "
409 "exptected %#x.\n", priv->ts_count, ts[3] & 0x0F, priv->tscc);
410 /* Drop partly decoded SNDU, reset state, resync on PUSI. */
411 if (priv->ule_skb) {
412 dev_kfree_skb( priv->ule_skb );
413 /* Prepare for next SNDU. */
414 // reset_ule(priv); moved to below.
415 ((struct dvb_net_priv *) dev->priv)->stats.rx_errors++;
416 ((struct dvb_net_priv *) dev->priv)->stats.rx_frame_errors++;
417 }
418 reset_ule(priv);
419 /* skip to next PUSI. */
420 priv->need_pusi = 1;
421 ts += TS_SZ;
422 priv->ts_count++;
423 continue;
424 }
425 /* If we still have an incomplete payload, but PUSI is
426 * set; some TS cells are missing.
427 * This is only possible here, if we missed exactly 16 TS
428 * cells (continuity counter wrap). */
429 if (ts[1] & TS_PUSI) {
430 if (! priv->need_pusi) {
431 if (*from_where > 181) {
432 /* Pointer field is invalid. Drop this TS cell and any started ULE SNDU. */
433 printk(KERN_WARNING "%lu: Invalid pointer "
434 "field: %u.\n", priv->ts_count, *from_where);
435
436 /* Drop partly decoded SNDU, reset state, resync on PUSI. */
437 if (priv->ule_skb) {
438 dev_kfree_skb( priv->ule_skb );
439 ((struct dvb_net_priv *) dev->priv)->stats.rx_errors++;
440 ((struct dvb_net_priv *) dev->priv)->stats.rx_frame_errors++;
441 }
442 reset_ule(priv);
443 priv->need_pusi = 1;
444 ts += TS_SZ;
445 priv->ts_count++;
446 continue;
447 }
448 /* Skip pointer field (we're processing a
449 * packed payload). */
450 from_where += 1;
451 ts_remain -= 1;
452 } else
453 priv->need_pusi = 0;
454
455 if (priv->ule_sndu_remain > 183) {
456 /* Current SNDU lacks more data than there could be available in the
457 * current TS cell. */
458 ((struct dvb_net_priv *) dev->priv)->stats.rx_errors++;
459 ((struct dvb_net_priv *) dev->priv)->stats.rx_length_errors++;
460 printk(KERN_WARNING "%lu: Expected %d more SNDU bytes, but "
461 "got PUSI (pf %d, ts_remain %d). Flushing incomplete payload.\n",
462 priv->ts_count, priv->ule_sndu_remain, ts[4], ts_remain);
463 dev_kfree_skb(priv->ule_skb);
464 /* Prepare for next SNDU. */
465 reset_ule(priv);
466 /* Resync: go to where pointer field points to: start of next ULE SNDU. */
467 from_where += ts[4];
468 ts_remain -= ts[4];
469 }
470 }
471 }
472
473 /* Check if new payload needs to be started. */
474 if (priv->ule_skb == NULL) {
475 /* Start a new payload with skb.
476 * Find ULE header. It is only guaranteed that the
477 * length field (2 bytes) is contained in the current
478 * TS.
479 * Check ts_remain has to be >= 2 here. */
480 if (ts_remain < 2) {
481 printk(KERN_WARNING "Invalid payload packing: only %d "
482 "bytes left in TS. Resyncing.\n", ts_remain);
483 priv->ule_sndu_len = 0;
484 priv->need_pusi = 1;
485 continue;
486 }
487
488 if (! priv->ule_sndu_len) {
489 /* Got at least two bytes, thus extrace the SNDU length. */
490 priv->ule_sndu_len = from_where[0] << 8 | from_where[1];
491 if (priv->ule_sndu_len & 0x8000) {
492 /* D-Bit is set: no dest mac present. */
493 priv->ule_sndu_len &= 0x7FFF;
494 priv->ule_dbit = 1;
495 } else
496 priv->ule_dbit = 0;
497
498 if (priv->ule_sndu_len > 32763) {
499 printk(KERN_WARNING "%lu: Invalid ULE SNDU length %u. "
500 "Resyncing.\n", priv->ts_count, priv->ule_sndu_len);
501 priv->ule_sndu_len = 0;
502 priv->need_pusi = 1;
503 new_ts = 1;
504 ts += TS_SZ;
505 priv->ts_count++;
506 continue;
507 }
508 ts_remain -= 2; /* consume the 2 bytes SNDU length. */
509 from_where += 2;
510 }
511
512 /*
513 * State of current TS:
514 * ts_remain (remaining bytes in the current TS cell)
515 * 0 ule_type is not available now, we need the next TS cell
516 * 1 the first byte of the ule_type is present
517 * >=2 full ULE header present, maybe some payload data as well.
518 */
519 switch (ts_remain) {
520 case 1:
521 priv->ule_sndu_type = from_where[0] << 8;
522 priv->ule_sndu_type_1 = 1; /* first byte of ule_type is set. */
523 ts_remain -= 1; from_where += 1;
524 /* Continue w/ next TS. */
525 case 0:
526 new_ts = 1;
527 ts += TS_SZ;
528 priv->ts_count++;
529 continue;
530
531 default: /* complete ULE header is present in current TS. */
532 /* Extract ULE type field. */
533 if (priv->ule_sndu_type_1) {
534 priv->ule_sndu_type |= from_where[0];
535 from_where += 1; /* points to payload start. */
536 ts_remain -= 1;
537 } else {
538 /* Complete type is present in new TS. */
539 priv->ule_sndu_type = from_where[0] << 8 | from_where[1];
540 from_where += 2; /* points to payload start. */
541 ts_remain -= 2;
542 }
543 break;
544 }
545
546 /* Allocate the skb (decoder target buffer) with the correct size, as follows:
547 * prepare for the largest case: bridged SNDU with MAC address (dbit = 0). */
548 priv->ule_skb = dev_alloc_skb( priv->ule_sndu_len + ETH_HLEN + ETH_ALEN );
549 if (priv->ule_skb == NULL) {
550 printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n",
551 dev->name);
552 ((struct dvb_net_priv *)dev->priv)->stats.rx_dropped++;
553 return;
554 }
555
556 /* This includes the CRC32 _and_ dest mac, if !dbit. */
557 priv->ule_sndu_remain = priv->ule_sndu_len;
558 priv->ule_skb->dev = dev;
559 /* Leave space for Ethernet or bridged SNDU header (eth hdr plus one MAC addr). */
560 skb_reserve( priv->ule_skb, ETH_HLEN + ETH_ALEN );
561 }
562
563 /* Copy data into our current skb. */
564 how_much = min(priv->ule_sndu_remain, (int)ts_remain);
565 memcpy(skb_put(priv->ule_skb, how_much), from_where, how_much);
566 priv->ule_sndu_remain -= how_much;
567 ts_remain -= how_much;
568 from_where += how_much;
569
570 /* Check for complete payload. */
571 if (priv->ule_sndu_remain <= 0) {
572 /* Check CRC32, we've got it in our skb already. */
573 unsigned short ulen = htons(priv->ule_sndu_len);
574 unsigned short utype = htons(priv->ule_sndu_type);
575 struct kvec iov[3] = {
576 { &ulen, sizeof ulen },
577 { &utype, sizeof utype },
578 { priv->ule_skb->data, priv->ule_skb->len - 4 }
579 };
580 unsigned long ule_crc = ~0L, expected_crc;
581 if (priv->ule_dbit) {
582 /* Set D-bit for CRC32 verification,
583 * if it was set originally. */
584 ulen |= 0x0080;
585 }
586
587 ule_crc = iov_crc32(ule_crc, iov, 3);
588 expected_crc = *((u8 *)priv->ule_skb->tail - 4) << 24 |
589 *((u8 *)priv->ule_skb->tail - 3) << 16 |
590 *((u8 *)priv->ule_skb->tail - 2) << 8 |
591 *((u8 *)priv->ule_skb->tail - 1);
592 if (ule_crc != expected_crc) {
593 printk(KERN_WARNING "%lu: CRC32 check FAILED: %#lx / %#lx, SNDU len %d type %#x, ts_remain %d, next 2: %x.\n",
594 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);
595
596 #ifdef ULE_DEBUG
597 hexdump( iov[0].iov_base, iov[0].iov_len );
598 hexdump( iov[1].iov_base, iov[1].iov_len );
599 hexdump( iov[2].iov_base, iov[2].iov_len );
600
601 if (ule_where == ule_hist) {
602 hexdump( &ule_hist[98*TS_SZ], TS_SZ );
603 hexdump( &ule_hist[99*TS_SZ], TS_SZ );
604 } else if (ule_where == &ule_hist[TS_SZ]) {
605 hexdump( &ule_hist[99*TS_SZ], TS_SZ );
606 hexdump( ule_hist, TS_SZ );
607 } else {
608 hexdump( ule_where - TS_SZ - TS_SZ, TS_SZ );
609 hexdump( ule_where - TS_SZ, TS_SZ );
610 }
611 ule_dump = 1;
612 #endif
613
614 ((struct dvb_net_priv *) dev->priv)->stats.rx_errors++;
615 ((struct dvb_net_priv *) dev->priv)->stats.rx_crc_errors++;
616 dev_kfree_skb(priv->ule_skb);
617 } else {
618 /* CRC32 verified OK. */
619 /* Handle ULE Extension Headers. */
620 if (priv->ule_sndu_type < 1536) {
621 /* There is an extension header. Handle it accordingly. */
622 int l = handle_ule_extensions( priv );
623 if (l < 0) {
624 /* Mandatory extension header unknown or TEST SNDU. Drop it. */
625 // printk( KERN_WARNING "Dropping SNDU, extension headers.\n" );
626 dev_kfree_skb( priv->ule_skb );
627 goto sndu_done;
628 }
629 skb_pull( priv->ule_skb, l );
630 }
631
632 /* CRC32 was OK. Remove it from skb. */
633 priv->ule_skb->tail -= 4;
634 priv->ule_skb->len -= 4;
635
636 /* Filter on receiver's destination MAC address, if present. */
637 if (!priv->ule_dbit) {
638 /* The destination MAC address is the next data in the skb. */
639 if (memcmp( priv->ule_skb->data, dev->dev_addr, ETH_ALEN )) {
640 /* MAC addresses don't match. Drop SNDU. */
641 // printk( KERN_WARNING "Dropping SNDU, MAC address.\n" );
642 dev_kfree_skb( priv->ule_skb );
643 goto sndu_done;
644 }
645 if (! priv->ule_bridged) {
646 skb_push( priv->ule_skb, ETH_ALEN + 2 );
647 ethh = (struct ethhdr *)priv->ule_skb->data;
648 memcpy( ethh->h_dest, ethh->h_source, ETH_ALEN );
649 memset( ethh->h_source, 0, ETH_ALEN );
650 ethh->h_proto = htons( priv->ule_sndu_type );
651 } else {
652 /* Skip the Receiver destination MAC address. */
653 skb_pull( priv->ule_skb, ETH_ALEN );
654 }
655 } else {
656 if (! priv->ule_bridged) {
657 skb_push( priv->ule_skb, ETH_HLEN );
658 ethh = (struct ethhdr *)priv->ule_skb->data;
659 memcpy( ethh->h_dest, dev->dev_addr, ETH_ALEN );
660 memset( ethh->h_source, 0, ETH_ALEN );
661 ethh->h_proto = htons( priv->ule_sndu_type );
662 } else {
663 /* skb is in correct state; nothing to do. */
664 }
665 }
666 priv->ule_bridged = 0;
667
668 /* Stuff into kernel's protocol stack. */
669 priv->ule_skb->protocol = dvb_net_eth_type_trans(priv->ule_skb, dev);
670 /* If D-bit is set (i.e. destination MAC address not present),
671 * receive the packet anyhow. */
672 /* if (priv->ule_dbit && skb->pkt_type == PACKET_OTHERHOST)
673 priv->ule_skb->pkt_type = PACKET_HOST; */
674 ((struct dvb_net_priv *) dev->priv)->stats.rx_packets++;
675 ((struct dvb_net_priv *) dev->priv)->stats.rx_bytes += priv->ule_skb->len;
676 netif_rx(priv->ule_skb);
677 }
678 sndu_done:
679 /* Prepare for next SNDU. */
680 reset_ule(priv);
681 }
682
683 /* More data in current TS (look at the bytes following the CRC32)? */
684 if (ts_remain >= 2 && *((unsigned short *)from_where) != 0xFFFF) {
685 /* Next ULE SNDU starts right there. */
686 new_ts = 0;
687 priv->ule_skb = NULL;
688 priv->ule_sndu_type_1 = 0;
689 priv->ule_sndu_len = 0;
690 // printk(KERN_WARNING "More data in current TS: [%#x %#x %#x %#x]\n",
691 // *(from_where + 0), *(from_where + 1),
692 // *(from_where + 2), *(from_where + 3));
693 // printk(KERN_WARNING "ts @ %p, stopped @ %p:\n", ts, from_where + 0);
694 // hexdump(ts, 188);
695 } else {
696 new_ts = 1;
697 ts += TS_SZ;
698 priv->ts_count++;
699 if (priv->ule_skb == NULL) {
700 priv->need_pusi = 1;
701 priv->ule_sndu_type_1 = 0;
702 priv->ule_sndu_len = 0;
703 }
704 }
705 } /* for all available TS cells */
706 }
707
708 static int dvb_net_ts_callback(const u8 *buffer1, size_t buffer1_len,
709 const u8 *buffer2, size_t buffer2_len,
710 struct dmx_ts_feed *feed, enum dmx_success success)
711 {
712 struct net_device *dev = feed->priv;
713
714 if (buffer2 != 0)
715 printk(KERN_WARNING "buffer2 not 0: %p.\n", buffer2);
716 if (buffer1_len > 32768)
717 printk(KERN_WARNING "length > 32k: %zu.\n", buffer1_len);
718 /* printk("TS callback: %u bytes, %u TS cells @ %p.\n",
719 buffer1_len, buffer1_len / TS_SZ, buffer1); */
720 dvb_net_ule(dev, buffer1, buffer1_len);
721 return 0;
722 }
723
724
725 static void dvb_net_sec(struct net_device *dev, u8 *pkt, int pkt_len)
726 {
727 u8 *eth;
728 struct sk_buff *skb;
729 struct net_device_stats *stats = &(((struct dvb_net_priv *) dev->priv)->stats);
730 int snap = 0;
731
732 /* note: pkt_len includes a 32bit checksum */
733 if (pkt_len < 16) {
734 printk("%s: IP/MPE packet length = %d too small.\n",
735 dev->name, pkt_len);
736 stats->rx_errors++;
737 stats->rx_length_errors++;
738 return;
739 }
740 /* it seems some ISPs manage to screw up here, so we have to
741 * relax the error checks... */
742 #if 0
743 if ((pkt[5] & 0xfd) != 0xc1) {
744 /* drop scrambled or broken packets */
745 #else
746 if ((pkt[5] & 0x3c) != 0x00) {
747 /* drop scrambled */
748 #endif
749 stats->rx_errors++;
750 stats->rx_crc_errors++;
751 return;
752 }
753 if (pkt[5] & 0x02) {
754 /* handle LLC/SNAP, see rfc-1042 */
755 if (pkt_len < 24 || memcmp(&pkt[12], "\xaa\xaa\x03\0\0\0", 6)) {
756 stats->rx_dropped++;
757 return;
758 }
759 snap = 8;
760 }
761 if (pkt[7]) {
762 /* FIXME: assemble datagram from multiple sections */
763 stats->rx_errors++;
764 stats->rx_frame_errors++;
765 return;
766 }
767
768 /* we have 14 byte ethernet header (ip header follows);
769 * 12 byte MPE header; 4 byte checksum; + 2 byte alignment, 8 byte LLC/SNAP
770 */
771 if (!(skb = dev_alloc_skb(pkt_len - 4 - 12 + 14 + 2 - snap))) {
772 //printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n", dev->name);
773 stats->rx_dropped++;
774 return;
775 }
776 skb_reserve(skb, 2); /* longword align L3 header */
777 skb->dev = dev;
778
779 /* copy L3 payload */
780 eth = (u8 *) skb_put(skb, pkt_len - 12 - 4 + 14 - snap);
781 memcpy(eth + 14, pkt + 12 + snap, pkt_len - 12 - 4 - snap);
782
783 /* create ethernet header: */
784 eth[0]=pkt[0x0b];
785 eth[1]=pkt[0x0a];
786 eth[2]=pkt[0x09];
787 eth[3]=pkt[0x08];
788 eth[4]=pkt[0x04];
789 eth[5]=pkt[0x03];
790
791 eth[6]=eth[7]=eth[8]=eth[9]=eth[10]=eth[11]=0;
792
793 if (snap) {
794 eth[12] = pkt[18];
795 eth[13] = pkt[19];
796 } else {
797 /* protocol numbers are from rfc-1700 or
798 * http://www.iana.org/assignments/ethernet-numbers
799 */
800 if (pkt[12] >> 4 == 6) { /* version field from IP header */
801 eth[12] = 0x86; /* IPv6 */
802 eth[13] = 0xdd;
803 } else {
804 eth[12] = 0x08; /* IPv4 */
805 eth[13] = 0x00;
806 }
807 }
808
809 skb->protocol = dvb_net_eth_type_trans(skb, dev);
810
811 stats->rx_packets++;
812 stats->rx_bytes+=skb->len;
813 netif_rx(skb);
814 }
815
816 static int dvb_net_sec_callback(const u8 *buffer1, size_t buffer1_len,
817 const u8 *buffer2, size_t buffer2_len,
818 struct dmx_section_filter *filter,
819 enum dmx_success success)
820 {
821 struct net_device *dev = filter->priv;
822
823 /**
824 * we rely on the DVB API definition where exactly one complete
825 * section is delivered in buffer1
826 */
827 dvb_net_sec (dev, (u8*) buffer1, buffer1_len);
828 return 0;
829 }
830
831 static int dvb_net_tx(struct sk_buff *skb, struct net_device *dev)
832 {
833 dev_kfree_skb(skb);
834 return 0;
835 }
836
837 static u8 mask_normal[6]={0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
838 static u8 mask_allmulti[6]={0xff, 0xff, 0xff, 0x00, 0x00, 0x00};
839 static u8 mac_allmulti[6]={0x01, 0x00, 0x5e, 0x00, 0x00, 0x00};
840 static u8 mask_promisc[6]={0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
841
842 static int dvb_net_filter_sec_set(struct net_device *dev,
843 struct dmx_section_filter **secfilter,
844 u8 *mac, u8 *mac_mask)
845 {
846 struct dvb_net_priv *priv = dev->priv;
847 int ret;
848
849 *secfilter=NULL;
850 ret = priv->secfeed->allocate_filter(priv->secfeed, secfilter);
851 if (ret<0) {
852 printk("%s: could not get filter\n", dev->name);
853 return ret;
854 }
855
856 (*secfilter)->priv=(void *) dev;
857
858 memset((*secfilter)->filter_value, 0x00, DMX_MAX_FILTER_SIZE);
859 memset((*secfilter)->filter_mask, 0x00, DMX_MAX_FILTER_SIZE);
860 memset((*secfilter)->filter_mode, 0xff, DMX_MAX_FILTER_SIZE);
861
862 (*secfilter)->filter_value[0]=0x3e;
863 (*secfilter)->filter_value[3]=mac[5];
864 (*secfilter)->filter_value[4]=mac[4];
865 (*secfilter)->filter_value[8]=mac[3];
866 (*secfilter)->filter_value[9]=mac[2];
867 (*secfilter)->filter_value[10]=mac[1];
868 (*secfilter)->filter_value[11]=mac[0];
869
870 (*secfilter)->filter_mask[0] = 0xff;
871 (*secfilter)->filter_mask[3] = mac_mask[5];
872 (*secfilter)->filter_mask[4] = mac_mask[4];
873 (*secfilter)->filter_mask[8] = mac_mask[3];
874 (*secfilter)->filter_mask[9] = mac_mask[2];
875 (*secfilter)->filter_mask[10] = mac_mask[1];
876 (*secfilter)->filter_mask[11]=mac_mask[0];
877
878 dprintk("%s: filter mac=%02x %02x %02x %02x %02x %02x\n",
879 dev->name, mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
880 dprintk("%s: filter mask=%02x %02x %02x %02x %02x %02x\n",
881 dev->name, mac_mask[0], mac_mask[1], mac_mask[2],
882 mac_mask[3], mac_mask[4], mac_mask[5]);
883
884 return 0;
885 }
886
887 static int dvb_net_feed_start(struct net_device *dev)
888 {
889 int ret, i;
890 struct dvb_net_priv *priv = dev->priv;
891 struct dmx_demux *demux = priv->demux;
892 unsigned char *mac = (unsigned char *) dev->dev_addr;
893
894 dprintk("%s: rx_mode %i\n", __FUNCTION__, priv->rx_mode);
895 if (priv->tsfeed || priv->secfeed || priv->secfilter || priv->multi_secfilter[0])
896 printk("%s: BUG %d\n", __FUNCTION__, __LINE__);
897
898 priv->secfeed=NULL;
899 priv->secfilter=NULL;
900 priv->tsfeed = NULL;
901
902 if (priv->feedtype == DVB_NET_FEEDTYPE_MPE) {
903 dprintk("%s: alloc secfeed\n", __FUNCTION__);
904 ret=demux->allocate_section_feed(demux, &priv->secfeed,
905 dvb_net_sec_callback);
906 if (ret<0) {
907 printk("%s: could not allocate section feed\n", dev->name);
908 return ret;
909 }
910
911 ret = priv->secfeed->set(priv->secfeed, priv->pid, 32768, 0, 1);
912
913 if (ret<0) {
914 printk("%s: could not set section feed\n", dev->name);
915 priv->demux->release_section_feed(priv->demux, priv->secfeed);
916 priv->secfeed=NULL;
917 return ret;
918 }
919
920 if (priv->rx_mode != RX_MODE_PROMISC) {
921 dprintk("%s: set secfilter\n", __FUNCTION__);
922 dvb_net_filter_sec_set(dev, &priv->secfilter, mac, mask_normal);
923 }
924
925 switch (priv->rx_mode) {
926 case RX_MODE_MULTI:
927 for (i = 0; i < priv->multi_num; i++) {
928 dprintk("%s: set multi_secfilter[%d]\n", __FUNCTION__, i);
929 dvb_net_filter_sec_set(dev, &priv->multi_secfilter[i],
930 priv->multi_macs[i], mask_normal);
931 }
932 break;
933 case RX_MODE_ALL_MULTI:
934 priv->multi_num=1;
935 dprintk("%s: set multi_secfilter[0]\n", __FUNCTION__);
936 dvb_net_filter_sec_set(dev, &priv->multi_secfilter[0],
937 mac_allmulti, mask_allmulti);
938 break;
939 case RX_MODE_PROMISC:
940 priv->multi_num=0;
941 dprintk("%s: set secfilter\n", __FUNCTION__);
942 dvb_net_filter_sec_set(dev, &priv->secfilter, mac, mask_promisc);
943 break;
944 }
945
946 dprintk("%s: start filtering\n", __FUNCTION__);
947 priv->secfeed->start_filtering(priv->secfeed);
948 } else if (priv->feedtype == DVB_NET_FEEDTYPE_ULE) {
949 struct timespec timeout = { 0, 30000000 }; // 30 msec
950
951 /* we have payloads encapsulated in TS */
952 dprintk("%s: alloc tsfeed\n", __FUNCTION__);
953 ret = demux->allocate_ts_feed(demux, &priv->tsfeed, dvb_net_ts_callback);
954 if (ret < 0) {
955 printk("%s: could not allocate ts feed\n", dev->name);
956 return ret;
957 }
958
959 /* Set netdevice pointer for ts decaps callback. */
960 priv->tsfeed->priv = (void *)dev;
961 ret = priv->tsfeed->set(priv->tsfeed, priv->pid,
962 TS_PACKET, DMX_TS_PES_OTHER,
963 188 * 100, /* nr. of bytes delivered per callback */
964 32768, /* circular buffer size */
965 0, /* descramble */
966 timeout);
967
968 if (ret < 0) {
969 printk("%s: could not set ts feed\n", dev->name);
970 priv->demux->release_ts_feed(priv->demux, priv->tsfeed);
971 priv->tsfeed = NULL;
972 return ret;
973 }
974
975 dprintk("%s: start filtering\n", __FUNCTION__);
976 priv->tsfeed->start_filtering(priv->tsfeed);
977 } else
978 return -EINVAL;
979
980 return 0;
981 }
982
983 static int dvb_net_feed_stop(struct net_device *dev)
984 {
985 struct dvb_net_priv *priv = dev->priv;
986 int i;
987
988 dprintk("%s\n", __FUNCTION__);
989 if (priv->feedtype == DVB_NET_FEEDTYPE_MPE) {
990 if (priv->secfeed) {
991 if (priv->secfeed->is_filtering) {
992 dprintk("%s: stop secfeed\n", __FUNCTION__);
993 priv->secfeed->stop_filtering(priv->secfeed);
994 }
995
996 if (priv->secfilter) {
997 dprintk("%s: release secfilter\n", __FUNCTION__);
998 priv->secfeed->release_filter(priv->secfeed,
999 priv->secfilter);
1000 priv->secfilter=NULL;
1001 }
1002
1003 for (i=0; i<priv->multi_num; i++) {
1004 if (priv->multi_secfilter[i]) {
1005 dprintk("%s: release multi_filter[%d]\n",
1006 __FUNCTION__, i);
1007 priv->secfeed->release_filter(priv->secfeed,
1008 priv->multi_secfilter[i]);
1009 priv->multi_secfilter[i] = NULL;
1010 }
1011 }
1012
1013 priv->demux->release_section_feed(priv->demux, priv->secfeed);
1014 priv->secfeed = NULL;
1015 } else
1016 printk("%s: no feed to stop\n", dev->name);
1017 } else if (priv->feedtype == DVB_NET_FEEDTYPE_ULE) {
1018 if (priv->tsfeed) {
1019 if (priv->tsfeed->is_filtering) {
1020 dprintk("%s: stop tsfeed\n", __FUNCTION__);
1021 priv->tsfeed->stop_filtering(priv->tsfeed);
1022 }
1023 priv->demux->release_ts_feed(priv->demux, priv->tsfeed);
1024 priv->tsfeed = NULL;
1025 }
1026 else
1027 printk("%s: no ts feed to stop\n", dev->name);
1028 } else
1029 return -EINVAL;
1030 return 0;
1031 }
1032
1033
1034 static int dvb_set_mc_filter (struct net_device *dev, struct dev_mc_list *mc)
1035 {
1036 struct dvb_net_priv *priv = dev->priv;
1037
1038 if (priv->multi_num == DVB_NET_MULTICAST_MAX)
1039 return -ENOMEM;
1040
1041 memcpy(priv->multi_macs[priv->multi_num], mc->dmi_addr, 6);
1042
1043 priv->multi_num++;
1044 return 0;
1045 }
1046
1047
1048 static void wq_set_multicast_list (void *data)
1049 {
1050 struct net_device *dev = data;
1051 struct dvb_net_priv *priv = dev->priv;
1052
1053 dvb_net_feed_stop(dev);
1054
1055 priv->rx_mode = RX_MODE_UNI;
1056
1057 if (dev->flags & IFF_PROMISC) {
1058 dprintk("%s: promiscuous mode\n", dev->name);
1059 priv->rx_mode = RX_MODE_PROMISC;
1060 } else if ((dev->flags & IFF_ALLMULTI)) {
1061 dprintk("%s: allmulti mode\n", dev->name);
1062 priv->rx_mode = RX_MODE_ALL_MULTI;
1063 } else if (dev->mc_count) {
1064 int mci;
1065 struct dev_mc_list *mc;
1066
1067 dprintk("%s: set_mc_list, %d entries\n",
1068 dev->name, dev->mc_count);
1069
1070 priv->rx_mode = RX_MODE_MULTI;
1071 priv->multi_num = 0;
1072
1073 for (mci = 0, mc=dev->mc_list;
1074 mci < dev->mc_count;
1075 mc = mc->next, mci++) {
1076 dvb_set_mc_filter(dev, mc);
1077 }
1078 }
1079
1080 dvb_net_feed_start(dev);
1081 }
1082
1083
1084 static void dvb_net_set_multicast_list (struct net_device *dev)
1085 {
1086 struct dvb_net_priv *priv = dev->priv;
1087 schedule_work(&priv->set_multicast_list_wq);
1088 }
1089
1090
1091 static void wq_restart_net_feed (void *data)
1092 {
1093 struct net_device *dev = data;
1094
1095 if (netif_running(dev)) {
1096 dvb_net_feed_stop(dev);
1097 dvb_net_feed_start(dev);
1098 }
1099 }
1100
1101
1102 static int dvb_net_set_mac (struct net_device *dev, void *p)
1103 {
1104 struct dvb_net_priv *priv = dev->priv;
1105 struct sockaddr *addr=p;
1106
1107 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1108
1109 if (netif_running(dev))
1110 schedule_work(&priv->restart_net_feed_wq);
1111
1112 return 0;
1113 }
1114
1115
1116 static int dvb_net_open(struct net_device *dev)
1117 {
1118 struct dvb_net_priv *priv = dev->priv;
1119
1120 priv->in_use++;
1121 dvb_net_feed_start(dev);
1122 return 0;
1123 }
1124
1125
1126 static int dvb_net_stop(struct net_device *dev)
1127 {
1128 struct dvb_net_priv *priv = dev->priv;
1129
1130 priv->in_use--;
1131 return dvb_net_feed_stop(dev);
1132 }
1133
1134 static struct net_device_stats * dvb_net_get_stats(struct net_device *dev)
1135 {
1136 return &((struct dvb_net_priv*) dev->priv)->stats;
1137 }
1138
1139 static void dvb_net_setup(struct net_device *dev)
1140 {
1141 ether_setup(dev);
1142
1143 dev->open = dvb_net_open;
1144 dev->stop = dvb_net_stop;
1145 dev->hard_start_xmit = dvb_net_tx;
1146 dev->get_stats = dvb_net_get_stats;
1147 dev->set_multicast_list = dvb_net_set_multicast_list;
1148 dev->set_mac_address = dvb_net_set_mac;
1149 dev->mtu = 4096;
1150 dev->mc_count = 0;
1151 dev->hard_header_cache = NULL;
1152 dev->flags |= IFF_NOARP;
1153 }
1154
1155 static int get_if(struct dvb_net *dvbnet)
1156 {
1157 int i;
1158
1159 for (i=0; i<DVB_NET_DEVICES_MAX; i++)
1160 if (!dvbnet->state[i])
1161 break;
1162
1163 if (i == DVB_NET_DEVICES_MAX)
1164 return -1;
1165
1166 dvbnet->state[i]=1;
1167 return i;
1168 }
1169
1170 static int dvb_net_add_if(struct dvb_net *dvbnet, u16 pid, u8 feedtype)
1171 {
1172 struct net_device *net;
1173 struct dvb_net_priv *priv;
1174 int result;
1175 int if_num;
1176
1177 if (feedtype != DVB_NET_FEEDTYPE_MPE && feedtype != DVB_NET_FEEDTYPE_ULE)
1178 return -EINVAL;
1179 if ((if_num = get_if(dvbnet)) < 0)
1180 return -EINVAL;
1181
1182 net = alloc_netdev(sizeof(struct dvb_net_priv), "dvb", dvb_net_setup);
1183 if (!net)
1184 return -ENOMEM;
1185
1186 if (dvbnet->dvbdev->id)
1187 snprintf(net->name, IFNAMSIZ, "dvb%d%u%d",
1188 dvbnet->dvbdev->adapter->num, dvbnet->dvbdev->id, if_num);
1189 else
1190 /* compatibility fix to keep dvb0_0 format */
1191 snprintf(net->name, IFNAMSIZ, "dvb%d_%d",
1192 dvbnet->dvbdev->adapter->num, if_num);
1193
1194 net->addr_len = 6;
1195 memcpy(net->dev_addr, dvbnet->dvbdev->adapter->proposed_mac, 6);
1196
1197 dvbnet->device[if_num] = net;
1198
1199 priv = net->priv;
1200 priv->demux = dvbnet->demux;
1201 priv->pid = pid;
1202 priv->rx_mode = RX_MODE_UNI;
1203 priv->need_pusi = 1;
1204 priv->tscc = 0;
1205 priv->feedtype = feedtype;
1206 reset_ule(priv);
1207
1208 INIT_WORK(&priv->set_multicast_list_wq, wq_set_multicast_list, net);
1209 INIT_WORK(&priv->restart_net_feed_wq, wq_restart_net_feed, net);
1210
1211 net->base_addr = pid;
1212
1213 if ((result = register_netdev(net)) < 0) {
1214 dvbnet->device[if_num] = NULL;
1215 free_netdev(net);
1216 return result;
1217 }
1218 printk("dvb_net: created network interface %s\n", net->name);
1219
1220 return if_num;
1221 }
1222
1223 static int dvb_net_remove_if(struct dvb_net *dvbnet, unsigned int num)
1224 {
1225 struct net_device *net = dvbnet->device[num];
1226 struct dvb_net_priv *priv;
1227
1228 if (!dvbnet->state[num])
1229 return -EINVAL;
1230 priv = net->priv;
1231 if (priv->in_use)
1232 return -EBUSY;
1233
1234 dvb_net_stop(net);
1235 flush_scheduled_work();
1236 printk("dvb_net: removed network interface %s\n", net->name);
1237 unregister_netdev(net);
1238 dvbnet->state[num]=0;
1239 dvbnet->device[num] = NULL;
1240 free_netdev(net);
1241
1242 return 0;
1243 }
1244
1245 static int dvb_net_do_ioctl(struct inode *inode, struct file *file,
1246 unsigned int cmd, void *parg)
1247 {
1248 struct dvb_device *dvbdev = file->private_data;
1249 struct dvb_net *dvbnet = dvbdev->priv;
1250
1251 if (((file->f_flags&O_ACCMODE)==O_RDONLY))
1252 return -EPERM;
1253
1254 switch (cmd) {
1255 case NET_ADD_IF:
1256 {
1257 struct dvb_net_if *dvbnetif = parg;
1258 int result;
1259
1260 if (!capable(CAP_SYS_ADMIN))
1261 return -EPERM;
1262
1263 if (!try_module_get(dvbdev->adapter->module))
1264 return -EPERM;
1265
1266 result=dvb_net_add_if(dvbnet, dvbnetif->pid, dvbnetif->feedtype);
1267 if (result<0) {
1268 module_put(dvbdev->adapter->module);
1269 return result;
1270 }
1271 dvbnetif->if_num=result;
1272 break;
1273 }
1274 case NET_GET_IF:
1275 {
1276 struct net_device *netdev;
1277 struct dvb_net_priv *priv_data;
1278 struct dvb_net_if *dvbnetif = parg;
1279
1280 if (dvbnetif->if_num >= DVB_NET_DEVICES_MAX ||
1281 !dvbnet->state[dvbnetif->if_num])
1282 return -EINVAL;
1283
1284 netdev = dvbnet->device[dvbnetif->if_num];
1285
1286 priv_data = netdev->priv;
1287 dvbnetif->pid=priv_data->pid;
1288 dvbnetif->feedtype=priv_data->feedtype;
1289 break;
1290 }
1291 case NET_REMOVE_IF:
1292 {
1293 int ret;
1294
1295 if (!capable(CAP_SYS_ADMIN))
1296 return -EPERM;
1297 if ((unsigned int) parg >= DVB_NET_DEVICES_MAX)
1298 return -EINVAL;
1299 ret = dvb_net_remove_if(dvbnet, (unsigned int) parg);
1300 if (!ret)
1301 module_put(dvbdev->adapter->module);
1302 return ret;
1303 }
1304
1305 /* binary compatiblity cruft */
1306 case __NET_ADD_IF_OLD:
1307 {
1308 struct __dvb_net_if_old *dvbnetif = parg;
1309 int result;
1310
1311 if (!capable(CAP_SYS_ADMIN))
1312 return -EPERM;
1313
1314 if (!try_module_get(dvbdev->adapter->module))
1315 return -EPERM;
1316
1317 result=dvb_net_add_if(dvbnet, dvbnetif->pid, DVB_NET_FEEDTYPE_MPE);
1318 if (result<0) {
1319 module_put(dvbdev->adapter->module);
1320 return result;
1321 }
1322 dvbnetif->if_num=result;
1323 break;
1324 }
1325 case __NET_GET_IF_OLD:
1326 {
1327 struct net_device *netdev;
1328 struct dvb_net_priv *priv_data;
1329 struct __dvb_net_if_old *dvbnetif = parg;
1330
1331 if (dvbnetif->if_num >= DVB_NET_DEVICES_MAX ||
1332 !dvbnet->state[dvbnetif->if_num])
1333 return -EINVAL;
1334
1335 netdev = dvbnet->device[dvbnetif->if_num];
1336
1337 priv_data = netdev->priv;
1338 dvbnetif->pid=priv_data->pid;
1339 break;
1340 }
1341 default:
1342 return -ENOTTY;
1343 }
1344 return 0;
1345 }
1346
1347 static int dvb_net_ioctl(struct inode *inode, struct file *file,
1348 unsigned int cmd, unsigned long arg)
1349 {
1350 return dvb_usercopy(inode, file, cmd, arg, dvb_net_do_ioctl);
1351 }
1352
1353 static struct file_operations dvb_net_fops = {
1354 .owner = THIS_MODULE,
1355 .ioctl = dvb_net_ioctl,
1356 .open = dvb_generic_open,
1357 .release = dvb_generic_release,
1358 };
1359
1360 static struct dvb_device dvbdev_net = {
1361 .priv = NULL,
1362 .users = 1,
1363 .writers = 1,
1364 .fops = &dvb_net_fops,
1365 };
1366
1367
1368 void dvb_net_release (struct dvb_net *dvbnet)
1369 {
1370 int i;
1371
1372 dvb_unregister_device(dvbnet->dvbdev);
1373
1374 for (i=0; i<DVB_NET_DEVICES_MAX; i++) {
1375 if (!dvbnet->state[i])
1376 continue;
1377 dvb_net_remove_if(dvbnet, i);
1378 }
1379 }
1380 EXPORT_SYMBOL(dvb_net_release);
1381
1382
1383 int dvb_net_init (struct dvb_adapter *adap, struct dvb_net *dvbnet,
1384 struct dmx_demux *dmx)
1385 {
1386 int i;
1387
1388 dvbnet->demux = dmx;
1389
1390 for (i=0; i<DVB_NET_DEVICES_MAX; i++)
1391 dvbnet->state[i] = 0;
1392
1393 dvb_register_device (adap, &dvbnet->dvbdev, &dvbdev_net,
1394 dvbnet, DVB_DEVICE_NET);
1395
1396 return 0;
1397 }
1398 EXPORT_SYMBOL(dvb_net_init);
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