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[ARM] Support register switch in nommu mode
[linux-2.6/verdex.git] / drivers / media / dvb / dvb-core / dvb_net.c
blob6711eb6a058c9bc6548bb323c684785e549a3466
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
66 #include "dvb_demux.h"
67 #include "dvb_net.h"
68
69 static int dvb_net_debug;
70 module_param(dvb_net_debug, int, 0444);
71 MODULE_PARM_DESC(dvb_net_debug, "enable debug messages");
72
73 #define dprintk(x...) do { if (dvb_net_debug) printk(x); } while (0)
74
75
76 static inline __u32 iov_crc32( __u32 c, struct kvec *iov, unsigned int cnt )
77 {
78 unsigned int j;
79 for (j = 0; j < cnt; j++)
80 c = crc32_be( c, iov[j].iov_base, iov[j].iov_len );
81 return c;
82 }
83
84
85 #define DVB_NET_MULTICAST_MAX 10
86
87 #undef ULE_DEBUG
88
89 #ifdef ULE_DEBUG
90
91 #define isprint(c) ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || (c >= '0' && c <= '9'))
92
93 static void hexdump( const unsigned char *buf, unsigned short len )
94 {
95 char str[80], octet[10];
96 int ofs, i, l;
97
98 for (ofs = 0; ofs < len; ofs += 16) {
99 sprintf( str, "%03d: ", ofs );
100
101 for (i = 0; i < 16; i++) {
102 if ((i + ofs) < len)
103 sprintf( octet, "%02x ", buf[ofs + i] );
104 else
105 strcpy( octet, " " );
106
107 strcat( str, octet );
108 }
109 strcat( str, " " );
110 l = strlen( str );
111
112 for (i = 0; (i < 16) && ((i + ofs) < len); i++)
113 str[l++] = isprint( buf[ofs + i] ) ? buf[ofs + i] : '.';
114
115 str[l] = '\0';
116 printk( KERN_WARNING "%s\n", str );
117 }
118 }
119
120 #endif
121
122 struct dvb_net_priv {
123 int in_use;
124 struct net_device_stats stats;
125 u16 pid;
126 struct dvb_net *host;
127 struct dmx_demux *demux;
128 struct dmx_section_feed *secfeed;
129 struct dmx_section_filter *secfilter;
130 struct dmx_ts_feed *tsfeed;
131 int multi_num;
132 struct dmx_section_filter *multi_secfilter[DVB_NET_MULTICAST_MAX];
133 unsigned char multi_macs[DVB_NET_MULTICAST_MAX][6];
134 int rx_mode;
135 #define RX_MODE_UNI 0
136 #define RX_MODE_MULTI 1
137 #define RX_MODE_ALL_MULTI 2
138 #define RX_MODE_PROMISC 3
139 struct work_struct set_multicast_list_wq;
140 struct work_struct restart_net_feed_wq;
141 unsigned char feedtype; /* Either FEED_TYPE_ or FEED_TYPE_ULE */
142 int need_pusi; /* Set to 1, if synchronization on PUSI required. */
143 unsigned char tscc; /* TS continuity counter after sync on PUSI. */
144 struct sk_buff *ule_skb; /* ULE SNDU decodes into this buffer. */
145 unsigned char *ule_next_hdr; /* Pointer into skb to next ULE extension header. */
146 unsigned short ule_sndu_len; /* ULE SNDU length in bytes, w/o D-Bit. */
147 unsigned short ule_sndu_type; /* ULE SNDU type field, complete. */
148 unsigned char ule_sndu_type_1; /* ULE SNDU type field, if split across 2 TS cells. */
149 unsigned char ule_dbit; /* Whether the DestMAC address present
150 * or not (bit is set). */
151 unsigned char ule_bridged; /* Whether the ULE_BRIDGED extension header was found. */
152 int ule_sndu_remain; /* Nr. of bytes still required for current ULE SNDU. */
153 unsigned long ts_count; /* Current ts cell counter. */
154
155 struct semaphore mutex;
156 };
157
158
159 /**
160 * Determine the packet's protocol ID. The rule here is that we
161 * assume 802.3 if the type field is short enough to be a length.
162 * This is normal practice and works for any 'now in use' protocol.
163 *
164 * stolen from eth.c out of the linux kernel, hacked for dvb-device
165 * by Michael Holzt <kju@debian.org>
166 */
167 static unsigned short dvb_net_eth_type_trans(struct sk_buff *skb,
168 struct net_device *dev)
169 {
170 struct ethhdr *eth;
171 unsigned char *rawp;
172
173 skb->mac.raw=skb->data;
174 skb_pull(skb,dev->hard_header_len);
175 eth = eth_hdr(skb);
176
177 if (*eth->h_dest & 1) {
178 if(memcmp(eth->h_dest,dev->broadcast, ETH_ALEN)==0)
179 skb->pkt_type=PACKET_BROADCAST;
180 else
181 skb->pkt_type=PACKET_MULTICAST;
182 }
183
184 if (ntohs(eth->h_proto) >= 1536)
185 return eth->h_proto;
186
187 rawp = skb->data;
188
189 /**
190 * This is a magic hack to spot IPX packets. Older Novell breaks
191 * the protocol design and runs IPX over 802.3 without an 802.2 LLC
192 * layer. We look for FFFF which isn't a used 802.2 SSAP/DSAP. This
193 * won't work for fault tolerant netware but does for the rest.
194 */
195 if (*(unsigned short *)rawp == 0xFFFF)
196 return htons(ETH_P_802_3);
197
198 /**
199 * Real 802.2 LLC
200 */
201 return htons(ETH_P_802_2);
202 }
203
204 #define TS_SZ 188
205 #define TS_SYNC 0x47
206 #define TS_TEI 0x80
207 #define TS_SC 0xC0
208 #define TS_PUSI 0x40
209 #define TS_AF_A 0x20
210 #define TS_AF_D 0x10
211
212 /* ULE Extension Header handlers. */
213
214 #define ULE_TEST 0
215 #define ULE_BRIDGED 1
216
217 static int ule_test_sndu( struct dvb_net_priv *p )
218 {
219 return -1;
220 }
221
222 static int ule_bridged_sndu( struct dvb_net_priv *p )
223 {
224 /* BRIDGE SNDU handling sucks in draft-ietf-ipdvb-ule-03.txt.
225 * This has to be the last extension header, otherwise it won't work.
226 * Blame the authors!
227 */
228 p->ule_bridged = 1;
229 return 0;
230 }
231
232
233 /** Handle ULE extension headers.
234 * Function is called after a successful CRC32 verification of an ULE SNDU to complete its decoding.
235 * Returns: >= 0: nr. of bytes consumed by next extension header
236 * -1: Mandatory extension header that is not recognized or TEST SNDU; discard.
237 */
238 static int handle_one_ule_extension( struct dvb_net_priv *p )
239 {
240 /* Table of mandatory extension header handlers. The header type is the index. */
241 static int (*ule_mandatory_ext_handlers[255])( struct dvb_net_priv *p ) =
242 { [0] = ule_test_sndu, [1] = ule_bridged_sndu, [2] = NULL, };
243
244 /* Table of optional extension header handlers. The header type is the index. */
245 static int (*ule_optional_ext_handlers[255])( struct dvb_net_priv *p ) = { NULL, };
246
247 int ext_len = 0;
248 unsigned char hlen = (p->ule_sndu_type & 0x0700) >> 8;
249 unsigned char htype = p->ule_sndu_type & 0x00FF;
250
251 /* Discriminate mandatory and optional extension headers. */
252 if (hlen == 0) {
253 /* Mandatory extension header */
254 if (ule_mandatory_ext_handlers[htype]) {
255 ext_len = ule_mandatory_ext_handlers[htype]( p );
256 p->ule_next_hdr += ext_len;
257 if (! p->ule_bridged) {
258 p->ule_sndu_type = ntohs( *(unsigned short *)p->ule_next_hdr );
259 p->ule_next_hdr += 2;
260 } else {
261 p->ule_sndu_type = ntohs( *(unsigned short *)(p->ule_next_hdr + ((p->ule_dbit ? 2 : 3) * ETH_ALEN)) );
262 /* This assures the extension handling loop will terminate. */
263 }
264 } else
265 ext_len = -1; /* SNDU has to be discarded. */
266 } else {
267 /* Optional extension header. Calculate the length. */
268 ext_len = hlen << 2;
269 /* Process the optional extension header according to its type. */
270 if (ule_optional_ext_handlers[htype])
271 (void)ule_optional_ext_handlers[htype]( p );
272 p->ule_next_hdr += ext_len;
273 p->ule_sndu_type = ntohs( *(unsigned short *)p->ule_next_hdr );
274 p->ule_next_hdr += 2;
275 }
276
277 return ext_len;
278 }
279
280 static int handle_ule_extensions( struct dvb_net_priv *p )
281 {
282 int total_ext_len = 0, l;
283
284 p->ule_next_hdr = p->ule_skb->data;
285 do {
286 l = handle_one_ule_extension( p );
287 if (l == -1) return -1; /* Stop extension header processing and discard SNDU. */
288 total_ext_len += l;
289
290 } while (p->ule_sndu_type < 1536);
291
292 return total_ext_len;
293 }
294
295
296 /** Prepare for a new ULE SNDU: reset the decoder state. */
297 static inline void reset_ule( struct dvb_net_priv *p )
298 {
299 p->ule_skb = NULL;
300 p->ule_next_hdr = NULL;
301 p->ule_sndu_len = 0;
302 p->ule_sndu_type = 0;
303 p->ule_sndu_type_1 = 0;
304 p->ule_sndu_remain = 0;
305 p->ule_dbit = 0xFF;
306 p->ule_bridged = 0;
307 }
308
309 /**
310 * Decode ULE SNDUs according to draft-ietf-ipdvb-ule-03.txt from a sequence of
311 * TS cells of a single PID.
312 */
313 static void dvb_net_ule( struct net_device *dev, const u8 *buf, size_t buf_len )
314 {
315 struct dvb_net_priv *priv = dev->priv;
316 unsigned long skipped = 0L;
317 u8 *ts, *ts_end, *from_where = NULL, ts_remain = 0, how_much = 0, new_ts = 1;
318 struct ethhdr *ethh = NULL;
319
320 #ifdef ULE_DEBUG
321 /* The code inside ULE_DEBUG keeps a history of the last 100 TS cells processed. */
322 static unsigned char ule_hist[100*TS_SZ];
323 static unsigned char *ule_where = ule_hist, ule_dump = 0;
324 #endif
325
326 if (dev == NULL) {
327 printk( KERN_ERR "NO netdev struct!\n" );
328 return;
329 }
330
331 /* For all TS cells in current buffer.
332 * Appearently, we are called for every single TS cell.
333 */
334 for (ts = (char *)buf, ts_end = (char *)buf + buf_len; ts < ts_end; /* no default incr. */ ) {
335
336 if (new_ts) {
337 /* We are about to process a new TS cell. */
338
339 #ifdef ULE_DEBUG
340 if (ule_where >= &ule_hist[100*TS_SZ]) ule_where = ule_hist;
341 memcpy( ule_where, ts, TS_SZ );
342 if (ule_dump) {
343 hexdump( ule_where, TS_SZ );
344 ule_dump = 0;
345 }
346 ule_where += TS_SZ;
347 #endif
348
349 /* Check TS error conditions: sync_byte, transport_error_indicator, scrambling_control . */
350 if ((ts[0] != TS_SYNC) || (ts[1] & TS_TEI) || ((ts[3] & TS_SC) != 0)) {
351 printk(KERN_WARNING "%lu: Invalid TS cell: SYNC %#x, TEI %u, SC %#x.\n",
352 priv->ts_count, ts[0], ts[1] & TS_TEI >> 7, ts[3] & 0xC0 >> 6);
353
354 /* Drop partly decoded SNDU, reset state, resync on PUSI. */
355 if (priv->ule_skb) {
356 dev_kfree_skb( priv->ule_skb );
357 /* Prepare for next SNDU. */
358 ((struct dvb_net_priv *) dev->priv)->stats.rx_errors++;
359 ((struct dvb_net_priv *) dev->priv)->stats.rx_frame_errors++;
360 }
361 reset_ule(priv);
362 priv->need_pusi = 1;
363
364 /* Continue with next TS cell. */
365 ts += TS_SZ;
366 priv->ts_count++;
367 continue;
368 }
369
370 ts_remain = 184;
371 from_where = ts + 4;
372 }
373 /* Synchronize on PUSI, if required. */
374 if (priv->need_pusi) {
375 if (ts[1] & TS_PUSI) {
376 /* Find beginning of first ULE SNDU in current TS cell. */
377 /* Synchronize continuity counter. */
378 priv->tscc = ts[3] & 0x0F;
379 /* There is a pointer field here. */
380 if (ts[4] > ts_remain) {
381 printk(KERN_ERR "%lu: Invalid ULE packet "
382 "(pointer field %d)\n", priv->ts_count, ts[4]);
383 ts += TS_SZ;
384 priv->ts_count++;
385 continue;
386 }
387 /* Skip to destination of pointer field. */
388 from_where = &ts[5] + ts[4];
389 ts_remain -= 1 + ts[4];
390 skipped = 0;
391 } else {
392 skipped++;
393 ts += TS_SZ;
394 priv->ts_count++;
395 continue;
396 }
397 }
398
399 /* Check continuity counter. */
400 if (new_ts) {
401 if ((ts[3] & 0x0F) == priv->tscc)
402 priv->tscc = (priv->tscc + 1) & 0x0F;
403 else {
404 /* TS discontinuity handling: */
405 printk(KERN_WARNING "%lu: TS discontinuity: got %#x, "
406 "exptected %#x.\n", priv->ts_count, ts[3] & 0x0F, priv->tscc);
407 /* Drop partly decoded SNDU, reset state, resync on PUSI. */
408 if (priv->ule_skb) {
409 dev_kfree_skb( priv->ule_skb );
410 /* Prepare for next SNDU. */
411 // reset_ule(priv); moved to below.
412 ((struct dvb_net_priv *) dev->priv)->stats.rx_errors++;
413 ((struct dvb_net_priv *) dev->priv)->stats.rx_frame_errors++;
414 }
415 reset_ule(priv);
416 /* skip to next PUSI. */
417 priv->need_pusi = 1;
418 ts += TS_SZ;
419 priv->ts_count++;
420 continue;
421 }
422 /* If we still have an incomplete payload, but PUSI is
423 * set; some TS cells are missing.
424 * This is only possible here, if we missed exactly 16 TS
425 * cells (continuity counter wrap). */
426 if (ts[1] & TS_PUSI) {
427 if (! priv->need_pusi) {
428 if (*from_where > 181) {
429 /* Pointer field is invalid. Drop this TS cell and any started ULE SNDU. */
430 printk(KERN_WARNING "%lu: Invalid pointer "
431 "field: %u.\n", priv->ts_count, *from_where);
432
433 /* Drop partly decoded SNDU, reset state, resync on PUSI. */
434 if (priv->ule_skb) {
435 dev_kfree_skb( priv->ule_skb );
436 ((struct dvb_net_priv *) dev->priv)->stats.rx_errors++;
437 ((struct dvb_net_priv *) dev->priv)->stats.rx_frame_errors++;
438 }
439 reset_ule(priv);
440 priv->need_pusi = 1;
441 ts += TS_SZ;
442 priv->ts_count++;
443 continue;
444 }
445 /* Skip pointer field (we're processing a
446 * packed payload). */
447 from_where += 1;
448 ts_remain -= 1;
449 } else
450 priv->need_pusi = 0;
451
452 if (priv->ule_sndu_remain > 183) {
453 /* Current SNDU lacks more data than there could be available in the
454 * current TS cell. */
455 ((struct dvb_net_priv *) dev->priv)->stats.rx_errors++;
456 ((struct dvb_net_priv *) dev->priv)->stats.rx_length_errors++;
457 printk(KERN_WARNING "%lu: Expected %d more SNDU bytes, but "
458 "got PUSI (pf %d, ts_remain %d). Flushing incomplete payload.\n",
459 priv->ts_count, priv->ule_sndu_remain, ts[4], ts_remain);
460 dev_kfree_skb(priv->ule_skb);
461 /* Prepare for next SNDU. */
462 reset_ule(priv);
463 /* Resync: go to where pointer field points to: start of next ULE SNDU. */
464 from_where += ts[4];
465 ts_remain -= ts[4];
466 }
467 }
468 }
469
470 /* Check if new payload needs to be started. */
471 if (priv->ule_skb == NULL) {
472 /* Start a new payload with skb.
473 * Find ULE header. It is only guaranteed that the
474 * length field (2 bytes) is contained in the current
475 * TS.
476 * Check ts_remain has to be >= 2 here. */
477 if (ts_remain < 2) {
478 printk(KERN_WARNING "Invalid payload packing: only %d "
479 "bytes left in TS. Resyncing.\n", ts_remain);
480 priv->ule_sndu_len = 0;
481 priv->need_pusi = 1;
482 continue;
483 }
484
485 if (! priv->ule_sndu_len) {
486 /* Got at least two bytes, thus extrace the SNDU length. */
487 priv->ule_sndu_len = from_where[0] << 8 | from_where[1];
488 if (priv->ule_sndu_len & 0x8000) {
489 /* D-Bit is set: no dest mac present. */
490 priv->ule_sndu_len &= 0x7FFF;
491 priv->ule_dbit = 1;
492 } else
493 priv->ule_dbit = 0;
494
495 if (priv->ule_sndu_len > 32763) {
496 printk(KERN_WARNING "%lu: Invalid ULE SNDU length %u. "
497 "Resyncing.\n", priv->ts_count, priv->ule_sndu_len);
498 priv->ule_sndu_len = 0;
499 priv->need_pusi = 1;
500 new_ts = 1;
501 ts += TS_SZ;
502 priv->ts_count++;
503 continue;
504 }
505 ts_remain -= 2; /* consume the 2 bytes SNDU length. */
506 from_where += 2;
507 }
508
509 /*
510 * State of current TS:
511 * ts_remain (remaining bytes in the current TS cell)
512 * 0 ule_type is not available now, we need the next TS cell
513 * 1 the first byte of the ule_type is present
514 * >=2 full ULE header present, maybe some payload data as well.
515 */
516 switch (ts_remain) {
517 case 1:
518 priv->ule_sndu_type = from_where[0] << 8;
519 priv->ule_sndu_type_1 = 1; /* first byte of ule_type is set. */
520 ts_remain -= 1; from_where += 1;
521 /* Continue w/ next TS. */
522 case 0:
523 new_ts = 1;
524 ts += TS_SZ;
525 priv->ts_count++;
526 continue;
527
528 default: /* complete ULE header is present in current TS. */
529 /* Extract ULE type field. */
530 if (priv->ule_sndu_type_1) {
531 priv->ule_sndu_type |= from_where[0];
532 from_where += 1; /* points to payload start. */
533 ts_remain -= 1;
534 } else {
535 /* Complete type is present in new TS. */
536 priv->ule_sndu_type = from_where[0] << 8 | from_where[1];
537 from_where += 2; /* points to payload start. */
538 ts_remain -= 2;
539 }
540 break;
541 }
542
543 /* Allocate the skb (decoder target buffer) with the correct size, as follows:
544 * prepare for the largest case: bridged SNDU with MAC address (dbit = 0). */
545 priv->ule_skb = dev_alloc_skb( priv->ule_sndu_len + ETH_HLEN + ETH_ALEN );
546 if (priv->ule_skb == NULL) {
547 printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n",
548 dev->name);
549 ((struct dvb_net_priv *)dev->priv)->stats.rx_dropped++;
550 return;
551 }
552
553 /* This includes the CRC32 _and_ dest mac, if !dbit. */
554 priv->ule_sndu_remain = priv->ule_sndu_len;
555 priv->ule_skb->dev = dev;
556 /* Leave space for Ethernet or bridged SNDU header (eth hdr plus one MAC addr). */
557 skb_reserve( priv->ule_skb, ETH_HLEN + ETH_ALEN );
558 }
559
560 /* Copy data into our current skb. */
561 how_much = min(priv->ule_sndu_remain, (int)ts_remain);
562 memcpy(skb_put(priv->ule_skb, how_much), from_where, how_much);
563 priv->ule_sndu_remain -= how_much;
564 ts_remain -= how_much;
565 from_where += how_much;
566
567 /* Check for complete payload. */
568 if (priv->ule_sndu_remain <= 0) {
569 /* Check CRC32, we've got it in our skb already. */
570 unsigned short ulen = htons(priv->ule_sndu_len);
571 unsigned short utype = htons(priv->ule_sndu_type);
572 struct kvec iov[3] = {
573 { &ulen, sizeof ulen },
574 { &utype, sizeof utype },
575 { priv->ule_skb->data, priv->ule_skb->len - 4 }
576 };
577 unsigned long ule_crc = ~0L, expected_crc;
578 if (priv->ule_dbit) {
579 /* Set D-bit for CRC32 verification,
580 * if it was set originally. */
581 ulen |= 0x0080;
582 }
583
584 ule_crc = iov_crc32(ule_crc, iov, 3);
585 expected_crc = *((u8 *)priv->ule_skb->tail - 4) << 24 |
586 *((u8 *)priv->ule_skb->tail - 3) << 16 |
587 *((u8 *)priv->ule_skb->tail - 2) << 8 |
588 *((u8 *)priv->ule_skb->tail - 1);
589 if (ule_crc != expected_crc) {
590 printk(KERN_WARNING "%lu: CRC32 check FAILED: %#lx / %#lx, SNDU len %d type %#x, ts_remain %d, next 2: %x.\n",
591 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);
592
593 #ifdef ULE_DEBUG
594 hexdump( iov[0].iov_base, iov[0].iov_len );
595 hexdump( iov[1].iov_base, iov[1].iov_len );
596 hexdump( iov[2].iov_base, iov[2].iov_len );
597
598 if (ule_where == ule_hist) {
599 hexdump( &ule_hist[98*TS_SZ], TS_SZ );
600 hexdump( &ule_hist[99*TS_SZ], TS_SZ );
601 } else if (ule_where == &ule_hist[TS_SZ]) {
602 hexdump( &ule_hist[99*TS_SZ], TS_SZ );
603 hexdump( ule_hist, TS_SZ );
604 } else {
605 hexdump( ule_where - TS_SZ - TS_SZ, TS_SZ );
606 hexdump( ule_where - TS_SZ, TS_SZ );
607 }
608 ule_dump = 1;
609 #endif
610
611 ((struct dvb_net_priv *) dev->priv)->stats.rx_errors++;
612 ((struct dvb_net_priv *) dev->priv)->stats.rx_crc_errors++;
613 dev_kfree_skb(priv->ule_skb);
614 } else {
615 /* CRC32 verified OK. */
616 /* Handle ULE Extension Headers. */
617 if (priv->ule_sndu_type < 1536) {
618 /* There is an extension header. Handle it accordingly. */
619 int l = handle_ule_extensions( priv );
620 if (l < 0) {
621 /* Mandatory extension header unknown or TEST SNDU. Drop it. */
622 // printk( KERN_WARNING "Dropping SNDU, extension headers.\n" );
623 dev_kfree_skb( priv->ule_skb );
624 goto sndu_done;
625 }
626 skb_pull( priv->ule_skb, l );
627 }
628
629 /* CRC32 was OK. Remove it from skb. */
630 priv->ule_skb->tail -= 4;
631 priv->ule_skb->len -= 4;
632
633 /* Filter on receiver's destination MAC address, if present. */
634 if (!priv->ule_dbit) {
635 /* The destination MAC address is the next data in the skb. */
636 if (memcmp( priv->ule_skb->data, dev->dev_addr, ETH_ALEN )) {
637 /* MAC addresses don't match. Drop SNDU. */
638 // printk( KERN_WARNING "Dropping SNDU, MAC address.\n" );
639 dev_kfree_skb( priv->ule_skb );
640 goto sndu_done;
641 }
642 if (! priv->ule_bridged) {
643 skb_push( priv->ule_skb, ETH_ALEN + 2 );
644 ethh = (struct ethhdr *)priv->ule_skb->data;
645 memcpy( ethh->h_dest, ethh->h_source, ETH_ALEN );
646 memset( ethh->h_source, 0, ETH_ALEN );
647 ethh->h_proto = htons( priv->ule_sndu_type );
648 } else {
649 /* Skip the Receiver destination MAC address. */
650 skb_pull( priv->ule_skb, ETH_ALEN );
651 }
652 } else {
653 if (! priv->ule_bridged) {
654 skb_push( priv->ule_skb, ETH_HLEN );
655 ethh = (struct ethhdr *)priv->ule_skb->data;
656 memcpy( ethh->h_dest, dev->dev_addr, ETH_ALEN );
657 memset( ethh->h_source, 0, ETH_ALEN );
658 ethh->h_proto = htons( priv->ule_sndu_type );
659 } else {
660 /* skb is in correct state; nothing to do. */
661 }
662 }
663 priv->ule_bridged = 0;
664
665 /* Stuff into kernel's protocol stack. */
666 priv->ule_skb->protocol = dvb_net_eth_type_trans(priv->ule_skb, dev);
667 /* If D-bit is set (i.e. destination MAC address not present),
668 * receive the packet anyhow. */
669 /* if (priv->ule_dbit && skb->pkt_type == PACKET_OTHERHOST)
670 priv->ule_skb->pkt_type = PACKET_HOST; */
671 ((struct dvb_net_priv *) dev->priv)->stats.rx_packets++;
672 ((struct dvb_net_priv *) dev->priv)->stats.rx_bytes += priv->ule_skb->len;
673 netif_rx(priv->ule_skb);
674 }
675 sndu_done:
676 /* Prepare for next SNDU. */
677 reset_ule(priv);
678 }
679
680 /* More data in current TS (look at the bytes following the CRC32)? */
681 if (ts_remain >= 2 && *((unsigned short *)from_where) != 0xFFFF) {
682 /* Next ULE SNDU starts right there. */
683 new_ts = 0;
684 priv->ule_skb = NULL;
685 priv->ule_sndu_type_1 = 0;
686 priv->ule_sndu_len = 0;
687 // printk(KERN_WARNING "More data in current TS: [%#x %#x %#x %#x]\n",
688 // *(from_where + 0), *(from_where + 1),
689 // *(from_where + 2), *(from_where + 3));
690 // printk(KERN_WARNING "ts @ %p, stopped @ %p:\n", ts, from_where + 0);
691 // hexdump(ts, 188);
692 } else {
693 new_ts = 1;
694 ts += TS_SZ;
695 priv->ts_count++;
696 if (priv->ule_skb == NULL) {
697 priv->need_pusi = 1;
698 priv->ule_sndu_type_1 = 0;
699 priv->ule_sndu_len = 0;
700 }
701 }
702 } /* for all available TS cells */
703 }
704
705 static int dvb_net_ts_callback(const u8 *buffer1, size_t buffer1_len,
706 const u8 *buffer2, size_t buffer2_len,
707 struct dmx_ts_feed *feed, enum dmx_success success)
708 {
709 struct net_device *dev = feed->priv;
710
711 if (buffer2 != 0)
712 printk(KERN_WARNING "buffer2 not 0: %p.\n", buffer2);
713 if (buffer1_len > 32768)
714 printk(KERN_WARNING "length > 32k: %zu.\n", buffer1_len);
715 /* printk("TS callback: %u bytes, %u TS cells @ %p.\n",
716 buffer1_len, buffer1_len / TS_SZ, buffer1); */
717 dvb_net_ule(dev, buffer1, buffer1_len);
718 return 0;
719 }
720
721
722 static void dvb_net_sec(struct net_device *dev, u8 *pkt, int pkt_len)
723 {
724 u8 *eth;
725 struct sk_buff *skb;
726 struct net_device_stats *stats = &(((struct dvb_net_priv *) dev->priv)->stats);
727 int snap = 0;
728
729 /* note: pkt_len includes a 32bit checksum */
730 if (pkt_len < 16) {
731 printk("%s: IP/MPE packet length = %d too small.\n",
732 dev->name, pkt_len);
733 stats->rx_errors++;
734 stats->rx_length_errors++;
735 return;
736 }
737 /* it seems some ISPs manage to screw up here, so we have to
738 * relax the error checks... */
739 #if 0
740 if ((pkt[5] & 0xfd) != 0xc1) {
741 /* drop scrambled or broken packets */
742 #else
743 if ((pkt[5] & 0x3c) != 0x00) {
744 /* drop scrambled */
745 #endif
746 stats->rx_errors++;
747 stats->rx_crc_errors++;
748 return;
749 }
750 if (pkt[5] & 0x02) {
751 /* handle LLC/SNAP, see rfc-1042 */
752 if (pkt_len < 24 || memcmp(&pkt[12], "\xaa\xaa\x03\0\0\0", 6)) {
753 stats->rx_dropped++;
754 return;
755 }
756 snap = 8;
757 }
758 if (pkt[7]) {
759 /* FIXME: assemble datagram from multiple sections */
760 stats->rx_errors++;
761 stats->rx_frame_errors++;
762 return;
763 }
764
765 /* we have 14 byte ethernet header (ip header follows);
766 * 12 byte MPE header; 4 byte checksum; + 2 byte alignment, 8 byte LLC/SNAP
767 */
768 if (!(skb = dev_alloc_skb(pkt_len - 4 - 12 + 14 + 2 - snap))) {
769 //printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n", dev->name);
770 stats->rx_dropped++;
771 return;
772 }
773 skb_reserve(skb, 2); /* longword align L3 header */
774 skb->dev = dev;
775
776 /* copy L3 payload */
777 eth = (u8 *) skb_put(skb, pkt_len - 12 - 4 + 14 - snap);
778 memcpy(eth + 14, pkt + 12 + snap, pkt_len - 12 - 4 - snap);
779
780 /* create ethernet header: */
781 eth[0]=pkt[0x0b];
782 eth[1]=pkt[0x0a];
783 eth[2]=pkt[0x09];
784 eth[3]=pkt[0x08];
785 eth[4]=pkt[0x04];
786 eth[5]=pkt[0x03];
787
788 eth[6]=eth[7]=eth[8]=eth[9]=eth[10]=eth[11]=0;
789
790 if (snap) {
791 eth[12] = pkt[18];
792 eth[13] = pkt[19];
793 } else {
794 /* protocol numbers are from rfc-1700 or
795 * http://www.iana.org/assignments/ethernet-numbers
796 */
797 if (pkt[12] >> 4 == 6) { /* version field from IP header */
798 eth[12] = 0x86; /* IPv6 */
799 eth[13] = 0xdd;
800 } else {
801 eth[12] = 0x08; /* IPv4 */
802 eth[13] = 0x00;
803 }
804 }
805
806 skb->protocol = dvb_net_eth_type_trans(skb, dev);
807
808 stats->rx_packets++;
809 stats->rx_bytes+=skb->len;
810 netif_rx(skb);
811 }
812
813 static int dvb_net_sec_callback(const u8 *buffer1, size_t buffer1_len,
814 const u8 *buffer2, size_t buffer2_len,
815 struct dmx_section_filter *filter,
816 enum dmx_success success)
817 {
818 struct net_device *dev = filter->priv;
819
820 /**
821 * we rely on the DVB API definition where exactly one complete
822 * section is delivered in buffer1
823 */
824 dvb_net_sec (dev, (u8*) buffer1, buffer1_len);
825 return 0;
826 }
827
828 static int dvb_net_tx(struct sk_buff *skb, struct net_device *dev)
829 {
830 dev_kfree_skb(skb);
831 return 0;
832 }
833
834 static u8 mask_normal[6]={0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
835 static u8 mask_allmulti[6]={0xff, 0xff, 0xff, 0x00, 0x00, 0x00};
836 static u8 mac_allmulti[6]={0x01, 0x00, 0x5e, 0x00, 0x00, 0x00};
837 static u8 mask_promisc[6]={0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
838
839 static int dvb_net_filter_sec_set(struct net_device *dev,
840 struct dmx_section_filter **secfilter,
841 u8 *mac, u8 *mac_mask)
842 {
843 struct dvb_net_priv *priv = dev->priv;
844 int ret;
845
846 *secfilter=NULL;
847 ret = priv->secfeed->allocate_filter(priv->secfeed, secfilter);
848 if (ret<0) {
849 printk("%s: could not get filter\n", dev->name);
850 return ret;
851 }
852
853 (*secfilter)->priv=(void *) dev;
854
855 memset((*secfilter)->filter_value, 0x00, DMX_MAX_FILTER_SIZE);
856 memset((*secfilter)->filter_mask, 0x00, DMX_MAX_FILTER_SIZE);
857 memset((*secfilter)->filter_mode, 0xff, DMX_MAX_FILTER_SIZE);
858
859 (*secfilter)->filter_value[0]=0x3e;
860 (*secfilter)->filter_value[3]=mac[5];
861 (*secfilter)->filter_value[4]=mac[4];
862 (*secfilter)->filter_value[8]=mac[3];
863 (*secfilter)->filter_value[9]=mac[2];
864 (*secfilter)->filter_value[10]=mac[1];
865 (*secfilter)->filter_value[11]=mac[0];
866
867 (*secfilter)->filter_mask[0] = 0xff;
868 (*secfilter)->filter_mask[3] = mac_mask[5];
869 (*secfilter)->filter_mask[4] = mac_mask[4];
870 (*secfilter)->filter_mask[8] = mac_mask[3];
871 (*secfilter)->filter_mask[9] = mac_mask[2];
872 (*secfilter)->filter_mask[10] = mac_mask[1];
873 (*secfilter)->filter_mask[11]=mac_mask[0];
874
875 dprintk("%s: filter mac=%02x %02x %02x %02x %02x %02x\n",
876 dev->name, mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
877 dprintk("%s: filter mask=%02x %02x %02x %02x %02x %02x\n",
878 dev->name, mac_mask[0], mac_mask[1], mac_mask[2],
879 mac_mask[3], mac_mask[4], mac_mask[5]);
880
881 return 0;
882 }
883
884 static int dvb_net_feed_start(struct net_device *dev)
885 {
886 int ret = 0, i;
887 struct dvb_net_priv *priv = dev->priv;
888 struct dmx_demux *demux = priv->demux;
889 unsigned char *mac = (unsigned char *) dev->dev_addr;
890
891 dprintk("%s: rx_mode %i\n", __FUNCTION__, priv->rx_mode);
892 down(&priv->mutex);
893 if (priv->tsfeed || priv->secfeed || priv->secfilter || priv->multi_secfilter[0])
894 printk("%s: BUG %d\n", __FUNCTION__, __LINE__);
895
896 priv->secfeed=NULL;
897 priv->secfilter=NULL;
898 priv->tsfeed = NULL;
899
900 if (priv->feedtype == DVB_NET_FEEDTYPE_MPE) {
901 dprintk("%s: alloc secfeed\n", __FUNCTION__);
902 ret=demux->allocate_section_feed(demux, &priv->secfeed,
903 dvb_net_sec_callback);
904 if (ret<0) {
905 printk("%s: could not allocate section feed\n", dev->name);
906 goto error;
907 }
908
909 ret = priv->secfeed->set(priv->secfeed, priv->pid, 32768, 1);
910
911 if (ret<0) {
912 printk("%s: could not set section feed\n", dev->name);
913 priv->demux->release_section_feed(priv->demux, priv->secfeed);
914 priv->secfeed=NULL;
915 goto error;
916 }
917
918 if (priv->rx_mode != RX_MODE_PROMISC) {
919 dprintk("%s: set secfilter\n", __FUNCTION__);
920 dvb_net_filter_sec_set(dev, &priv->secfilter, mac, mask_normal);
921 }
922
923 switch (priv->rx_mode) {
924 case RX_MODE_MULTI:
925 for (i = 0; i < priv->multi_num; i++) {
926 dprintk("%s: set multi_secfilter[%d]\n", __FUNCTION__, i);
927 dvb_net_filter_sec_set(dev, &priv->multi_secfilter[i],
928 priv->multi_macs[i], mask_normal);
929 }
930 break;
931 case RX_MODE_ALL_MULTI:
932 priv->multi_num=1;
933 dprintk("%s: set multi_secfilter[0]\n", __FUNCTION__);
934 dvb_net_filter_sec_set(dev, &priv->multi_secfilter[0],
935 mac_allmulti, mask_allmulti);
936 break;
937 case RX_MODE_PROMISC:
938 priv->multi_num=0;
939 dprintk("%s: set secfilter\n", __FUNCTION__);
940 dvb_net_filter_sec_set(dev, &priv->secfilter, mac, mask_promisc);
941 break;
942 }
943
944 dprintk("%s: start filtering\n", __FUNCTION__);
945 priv->secfeed->start_filtering(priv->secfeed);
946 } else if (priv->feedtype == DVB_NET_FEEDTYPE_ULE) {
947 struct timespec timeout = { 0, 30000000 }; // 30 msec
948
949 /* we have payloads encapsulated in TS */
950 dprintk("%s: alloc tsfeed\n", __FUNCTION__);
951 ret = demux->allocate_ts_feed(demux, &priv->tsfeed, dvb_net_ts_callback);
952 if (ret < 0) {
953 printk("%s: could not allocate ts feed\n", dev->name);
954 goto error;
955 }
956
957 /* Set netdevice pointer for ts decaps callback. */
958 priv->tsfeed->priv = (void *)dev;
959 ret = priv->tsfeed->set(priv->tsfeed, priv->pid,
960 TS_PACKET, DMX_TS_PES_OTHER,
961 32768, /* circular buffer size */
962 timeout);
963
964 if (ret < 0) {
965 printk("%s: could not set ts feed\n", dev->name);
966 priv->demux->release_ts_feed(priv->demux, priv->tsfeed);
967 priv->tsfeed = NULL;
968 goto error;
969 }
970
971 dprintk("%s: start filtering\n", __FUNCTION__);
972 priv->tsfeed->start_filtering(priv->tsfeed);
973 } else
974 ret = -EINVAL;
975
976 error:
977 up(&priv->mutex);
978 return ret;
979 }
980
981 static int dvb_net_feed_stop(struct net_device *dev)
982 {
983 struct dvb_net_priv *priv = dev->priv;
984 int i, ret = 0;
985
986 dprintk("%s\n", __FUNCTION__);
987 down(&priv->mutex);
988 if (priv->feedtype == DVB_NET_FEEDTYPE_MPE) {
989 if (priv->secfeed) {
990 if (priv->secfeed->is_filtering) {
991 dprintk("%s: stop secfeed\n", __FUNCTION__);
992 priv->secfeed->stop_filtering(priv->secfeed);
993 }
994
995 if (priv->secfilter) {
996 dprintk("%s: release secfilter\n", __FUNCTION__);
997 priv->secfeed->release_filter(priv->secfeed,
998 priv->secfilter);
999 priv->secfilter=NULL;
1000 }
1001
1002 for (i=0; i<priv->multi_num; i++) {
1003 if (priv->multi_secfilter[i]) {
1004 dprintk("%s: release multi_filter[%d]\n",
1005 __FUNCTION__, i);
1006 priv->secfeed->release_filter(priv->secfeed,
1007 priv->multi_secfilter[i]);
1008 priv->multi_secfilter[i] = NULL;
1009 }
1010 }
1011
1012 priv->demux->release_section_feed(priv->demux, priv->secfeed);
1013 priv->secfeed = NULL;
1014 } else
1015 printk("%s: no feed to stop\n", dev->name);
1016 } else if (priv->feedtype == DVB_NET_FEEDTYPE_ULE) {
1017 if (priv->tsfeed) {
1018 if (priv->tsfeed->is_filtering) {
1019 dprintk("%s: stop tsfeed\n", __FUNCTION__);
1020 priv->tsfeed->stop_filtering(priv->tsfeed);
1021 }
1022 priv->demux->release_ts_feed(priv->demux, priv->tsfeed);
1023 priv->tsfeed = NULL;
1024 }
1025 else
1026 printk("%s: no ts feed to stop\n", dev->name);
1027 } else
1028 ret = -EINVAL;
1029 up(&priv->mutex);
1030 return ret;
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 priv->rx_mode = RX_MODE_UNI;
1055 spin_lock_bh(&dev->xmit_lock);
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 spin_unlock_bh(&dev->xmit_lock);
1081 dvb_net_feed_start(dev);
1082 }
1083
1084
1085 static void dvb_net_set_multicast_list (struct net_device *dev)
1086 {
1087 struct dvb_net_priv *priv = dev->priv;
1088 schedule_work(&priv->set_multicast_list_wq);
1089 }
1090
1091
1092 static void wq_restart_net_feed (void *data)
1093 {
1094 struct net_device *dev = data;
1095
1096 if (netif_running(dev)) {
1097 dvb_net_feed_stop(dev);
1098 dvb_net_feed_start(dev);
1099 }
1100 }
1101
1102
1103 static int dvb_net_set_mac (struct net_device *dev, void *p)
1104 {
1105 struct dvb_net_priv *priv = dev->priv;
1106 struct sockaddr *addr=p;
1107
1108 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1109
1110 if (netif_running(dev))
1111 schedule_work(&priv->restart_net_feed_wq);
1112
1113 return 0;
1114 }
1115
1116
1117 static int dvb_net_open(struct net_device *dev)
1118 {
1119 struct dvb_net_priv *priv = dev->priv;
1120
1121 priv->in_use++;
1122 dvb_net_feed_start(dev);
1123 return 0;
1124 }
1125
1126
1127 static int dvb_net_stop(struct net_device *dev)
1128 {
1129 struct dvb_net_priv *priv = dev->priv;
1130
1131 priv->in_use--;
1132 return dvb_net_feed_stop(dev);
1133 }
1134
1135 static struct net_device_stats * dvb_net_get_stats(struct net_device *dev)
1136 {
1137 return &((struct dvb_net_priv*) dev->priv)->stats;
1138 }
1139
1140 static void dvb_net_setup(struct net_device *dev)
1141 {
1142 ether_setup(dev);
1143
1144 dev->open = dvb_net_open;
1145 dev->stop = dvb_net_stop;
1146 dev->hard_start_xmit = dvb_net_tx;
1147 dev->get_stats = dvb_net_get_stats;
1148 dev->set_multicast_list = dvb_net_set_multicast_list;
1149 dev->set_mac_address = dvb_net_set_mac;
1150 dev->mtu = 4096;
1151 dev->mc_count = 0;
1152 dev->hard_header_cache = NULL;
1153 dev->flags |= IFF_NOARP;
1154 }
1155
1156 static int get_if(struct dvb_net *dvbnet)
1157 {
1158 int i;
1159
1160 for (i=0; i<DVB_NET_DEVICES_MAX; i++)
1161 if (!dvbnet->state[i])
1162 break;
1163
1164 if (i == DVB_NET_DEVICES_MAX)
1165 return -1;
1166
1167 dvbnet->state[i]=1;
1168 return i;
1169 }
1170
1171 static int dvb_net_add_if(struct dvb_net *dvbnet, u16 pid, u8 feedtype)
1172 {
1173 struct net_device *net;
1174 struct dvb_net_priv *priv;
1175 int result;
1176 int if_num;
1177
1178 if (feedtype != DVB_NET_FEEDTYPE_MPE && feedtype != DVB_NET_FEEDTYPE_ULE)
1179 return -EINVAL;
1180 if ((if_num = get_if(dvbnet)) < 0)
1181 return -EINVAL;
1182
1183 net = alloc_netdev(sizeof(struct dvb_net_priv), "dvb", dvb_net_setup);
1184 if (!net)
1185 return -ENOMEM;
1186
1187 if (dvbnet->dvbdev->id)
1188 snprintf(net->name, IFNAMSIZ, "dvb%d%u%d",
1189 dvbnet->dvbdev->adapter->num, dvbnet->dvbdev->id, if_num);
1190 else
1191 /* compatibility fix to keep dvb0_0 format */
1192 snprintf(net->name, IFNAMSIZ, "dvb%d_%d",
1193 dvbnet->dvbdev->adapter->num, if_num);
1194
1195 net->addr_len = 6;
1196 memcpy(net->dev_addr, dvbnet->dvbdev->adapter->proposed_mac, 6);
1197
1198 dvbnet->device[if_num] = net;
1199
1200 priv = net->priv;
1201 priv->demux = dvbnet->demux;
1202 priv->pid = pid;
1203 priv->rx_mode = RX_MODE_UNI;
1204 priv->need_pusi = 1;
1205 priv->tscc = 0;
1206 priv->feedtype = feedtype;
1207 reset_ule(priv);
1208
1209 INIT_WORK(&priv->set_multicast_list_wq, wq_set_multicast_list, net);
1210 INIT_WORK(&priv->restart_net_feed_wq, wq_restart_net_feed, net);
1211 init_MUTEX(&priv->mutex);
1212
1213 net->base_addr = pid;
1214
1215 if ((result = register_netdev(net)) < 0) {
1216 dvbnet->device[if_num] = NULL;
1217 free_netdev(net);
1218 return result;
1219 }
1220 printk("dvb_net: created network interface %s\n", net->name);
1221
1222 return if_num;
1223 }
1224
1225 static int dvb_net_remove_if(struct dvb_net *dvbnet, unsigned long num)
1226 {
1227 struct net_device *net = dvbnet->device[num];
1228 struct dvb_net_priv *priv;
1229
1230 if (!dvbnet->state[num])
1231 return -EINVAL;
1232 priv = net->priv;
1233 if (priv->in_use)
1234 return -EBUSY;
1235
1236 dvb_net_stop(net);
1237 flush_scheduled_work();
1238 printk("dvb_net: removed network interface %s\n", net->name);
1239 unregister_netdev(net);
1240 dvbnet->state[num]=0;
1241 dvbnet->device[num] = NULL;
1242 free_netdev(net);
1243
1244 return 0;
1245 }
1246
1247 static int dvb_net_do_ioctl(struct inode *inode, struct file *file,
1248 unsigned int cmd, void *parg)
1249 {
1250 struct dvb_device *dvbdev = file->private_data;
1251 struct dvb_net *dvbnet = dvbdev->priv;
1252
1253 if (((file->f_flags&O_ACCMODE)==O_RDONLY))
1254 return -EPERM;
1255
1256 switch (cmd) {
1257 case NET_ADD_IF:
1258 {
1259 struct dvb_net_if *dvbnetif = parg;
1260 int result;
1261
1262 if (!capable(CAP_SYS_ADMIN))
1263 return -EPERM;
1264
1265 if (!try_module_get(dvbdev->adapter->module))
1266 return -EPERM;
1267
1268 result=dvb_net_add_if(dvbnet, dvbnetif->pid, dvbnetif->feedtype);
1269 if (result<0) {
1270 module_put(dvbdev->adapter->module);
1271 return result;
1272 }
1273 dvbnetif->if_num=result;
1274 break;
1275 }
1276 case NET_GET_IF:
1277 {
1278 struct net_device *netdev;
1279 struct dvb_net_priv *priv_data;
1280 struct dvb_net_if *dvbnetif = parg;
1281
1282 if (dvbnetif->if_num >= DVB_NET_DEVICES_MAX ||
1283 !dvbnet->state[dvbnetif->if_num])
1284 return -EINVAL;
1285
1286 netdev = dvbnet->device[dvbnetif->if_num];
1287
1288 priv_data = netdev->priv;
1289 dvbnetif->pid=priv_data->pid;
1290 dvbnetif->feedtype=priv_data->feedtype;
1291 break;
1292 }
1293 case NET_REMOVE_IF:
1294 {
1295 int ret;
1296
1297 if (!capable(CAP_SYS_ADMIN))
1298 return -EPERM;
1299 if ((unsigned long) parg >= DVB_NET_DEVICES_MAX)
1300 return -EINVAL;
1301 ret = dvb_net_remove_if(dvbnet, (unsigned long) parg);
1302 if (!ret)
1303 module_put(dvbdev->adapter->module);
1304 return ret;
1305 }
1306
1307 /* binary compatiblity cruft */
1308 case __NET_ADD_IF_OLD:
1309 {
1310 struct __dvb_net_if_old *dvbnetif = parg;
1311 int result;
1312
1313 if (!capable(CAP_SYS_ADMIN))
1314 return -EPERM;
1315
1316 if (!try_module_get(dvbdev->adapter->module))
1317 return -EPERM;
1318
1319 result=dvb_net_add_if(dvbnet, dvbnetif->pid, DVB_NET_FEEDTYPE_MPE);
1320 if (result<0) {
1321 module_put(dvbdev->adapter->module);
1322 return result;
1323 }
1324 dvbnetif->if_num=result;
1325 break;
1326 }
1327 case __NET_GET_IF_OLD:
1328 {
1329 struct net_device *netdev;
1330 struct dvb_net_priv *priv_data;
1331 struct __dvb_net_if_old *dvbnetif = parg;
1332
1333 if (dvbnetif->if_num >= DVB_NET_DEVICES_MAX ||
1334 !dvbnet->state[dvbnetif->if_num])
1335 return -EINVAL;
1336
1337 netdev = dvbnet->device[dvbnetif->if_num];
1338
1339 priv_data = netdev->priv;
1340 dvbnetif->pid=priv_data->pid;
1341 break;
1342 }
1343 default:
1344 return -ENOTTY;
1345 }
1346 return 0;
1347 }
1348
1349 static int dvb_net_ioctl(struct inode *inode, struct file *file,
1350 unsigned int cmd, unsigned long arg)
1351 {
1352 return dvb_usercopy(inode, file, cmd, arg, dvb_net_do_ioctl);
1353 }
1354
1355 static struct file_operations dvb_net_fops = {
1356 .owner = THIS_MODULE,
1357 .ioctl = dvb_net_ioctl,
1358 .open = dvb_generic_open,
1359 .release = dvb_generic_release,
1360 };
1361
1362 static struct dvb_device dvbdev_net = {
1363 .priv = NULL,
1364 .users = 1,
1365 .writers = 1,
1366 .fops = &dvb_net_fops,
1367 };
1368
1369
1370 void dvb_net_release (struct dvb_net *dvbnet)
1371 {
1372 int i;
1373
1374 dvb_unregister_device(dvbnet->dvbdev);
1375
1376 for (i=0; i<DVB_NET_DEVICES_MAX; i++) {
1377 if (!dvbnet->state[i])
1378 continue;
1379 dvb_net_remove_if(dvbnet, i);
1380 }
1381 }
1382 EXPORT_SYMBOL(dvb_net_release);
1383
1384
1385 int dvb_net_init (struct dvb_adapter *adap, struct dvb_net *dvbnet,
1386 struct dmx_demux *dmx)
1387 {
1388 int i;
1389
1390 dvbnet->demux = dmx;
1391
1392 for (i=0; i<DVB_NET_DEVICES_MAX; i++)
1393 dvbnet->state[i] = 0;
1394
1395 dvb_register_device (adap, &dvbnet->dvbdev, &dvbdev_net,
1396 dvbnet, DVB_DEVICE_NET);
1397
1398 return 0;
1399 }
1400 EXPORT_SYMBOL(dvb_net_init);
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