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V4L/DVB (6715): ivtv: Remove unnecessary register update
[linux-2.6/verdex.git] / drivers / media / dvb / dvb-core / dvb_net.c
bloba33eb5988c42e8aa1fcf64c1959084617c3d8e8e
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 net_device *net;
131 struct dvb_net *host;
132 struct dmx_demux *demux;
133 struct dmx_section_feed *secfeed;
134 struct dmx_section_filter *secfilter;
135 struct dmx_ts_feed *tsfeed;
136 int multi_num;
137 struct dmx_section_filter *multi_secfilter[DVB_NET_MULTICAST_MAX];
138 unsigned char multi_macs[DVB_NET_MULTICAST_MAX][6];
139 int rx_mode;
140 #define RX_MODE_UNI 0
141 #define RX_MODE_MULTI 1
142 #define RX_MODE_ALL_MULTI 2
143 #define RX_MODE_PROMISC 3
144 struct work_struct set_multicast_list_wq;
145 struct work_struct restart_net_feed_wq;
146 unsigned char feedtype; /* Either FEED_TYPE_ or FEED_TYPE_ULE */
147 int need_pusi; /* Set to 1, if synchronization on PUSI required. */
148 unsigned char tscc; /* TS continuity counter after sync on PUSI. */
149 struct sk_buff *ule_skb; /* ULE SNDU decodes into this buffer. */
150 unsigned char *ule_next_hdr; /* Pointer into skb to next ULE extension header. */
151 unsigned short ule_sndu_len; /* ULE SNDU length in bytes, w/o D-Bit. */
152 unsigned short ule_sndu_type; /* ULE SNDU type field, complete. */
153 unsigned char ule_sndu_type_1; /* ULE SNDU type field, if split across 2 TS cells. */
154 unsigned char ule_dbit; /* Whether the DestMAC address present
155 * or not (bit is set). */
156 unsigned char ule_bridged; /* Whether the ULE_BRIDGED extension header was found. */
157 int ule_sndu_remain; /* Nr. of bytes still required for current ULE SNDU. */
158 unsigned long ts_count; /* Current ts cell counter. */
159 struct mutex mutex;
160 };
161
162
163 /**
164 * Determine the packet's protocol ID. The rule here is that we
165 * assume 802.3 if the type field is short enough to be a length.
166 * This is normal practice and works for any 'now in use' protocol.
167 *
168 * stolen from eth.c out of the linux kernel, hacked for dvb-device
169 * by Michael Holzt <kju@debian.org>
170 */
171 static unsigned short dvb_net_eth_type_trans(struct sk_buff *skb,
172 struct net_device *dev)
173 {
174 struct ethhdr *eth;
175 unsigned char *rawp;
176
177 skb_reset_mac_header(skb);
178 skb_pull(skb,dev->hard_header_len);
179 eth = eth_hdr(skb);
180
181 if (*eth->h_dest & 1) {
182 if(memcmp(eth->h_dest,dev->broadcast, ETH_ALEN)==0)
183 skb->pkt_type=PACKET_BROADCAST;
184 else
185 skb->pkt_type=PACKET_MULTICAST;
186 }
187
188 if (ntohs(eth->h_proto) >= 1536)
189 return eth->h_proto;
190
191 rawp = skb->data;
192
193 /**
194 * This is a magic hack to spot IPX packets. Older Novell breaks
195 * the protocol design and runs IPX over 802.3 without an 802.2 LLC
196 * layer. We look for FFFF which isn't a used 802.2 SSAP/DSAP. This
197 * won't work for fault tolerant netware but does for the rest.
198 */
199 if (*(unsigned short *)rawp == 0xFFFF)
200 return htons(ETH_P_802_3);
201
202 /**
203 * Real 802.2 LLC
204 */
205 return htons(ETH_P_802_2);
206 }
207
208 #define TS_SZ 188
209 #define TS_SYNC 0x47
210 #define TS_TEI 0x80
211 #define TS_SC 0xC0
212 #define TS_PUSI 0x40
213 #define TS_AF_A 0x20
214 #define TS_AF_D 0x10
215
216 /* ULE Extension Header handlers. */
217
218 #define ULE_TEST 0
219 #define ULE_BRIDGED 1
220
221 #define ULE_OPTEXTHDR_PADDING 0
222
223 static int ule_test_sndu( struct dvb_net_priv *p )
224 {
225 return -1;
226 }
227
228 static int ule_bridged_sndu( struct dvb_net_priv *p )
229 {
230 struct ethhdr *hdr = (struct ethhdr*) p->ule_next_hdr;
231 if(ntohs(hdr->h_proto) < 1536) {
232 int framelen = p->ule_sndu_len - ((p->ule_next_hdr+sizeof(struct ethhdr)) - p->ule_skb->data);
233 /* A frame Type < 1536 for a bridged frame, introduces a LLC Length field. */
234 if(framelen != ntohs(hdr->h_proto)) {
235 return -1;
236 }
237 }
238 /* Note:
239 * From RFC4326:
240 * "A bridged SNDU is a Mandatory Extension Header of Type 1.
241 * It must be the final (or only) extension header specified in the header chain of a SNDU."
242 * The 'ule_bridged' flag will cause the extension header processing loop to terminate.
243 */
244 p->ule_bridged = 1;
245 return 0;
246 }
247
248 static int ule_exthdr_padding(struct dvb_net_priv *p)
249 {
250 return 0;
251 }
252
253 /** Handle ULE extension headers.
254 * Function is called after a successful CRC32 verification of an ULE SNDU to complete its decoding.
255 * Returns: >= 0: nr. of bytes consumed by next extension header
256 * -1: Mandatory extension header that is not recognized or TEST SNDU; discard.
257 */
258 static int handle_one_ule_extension( struct dvb_net_priv *p )
259 {
260 /* Table of mandatory extension header handlers. The header type is the index. */
261 static int (*ule_mandatory_ext_handlers[255])( struct dvb_net_priv *p ) =
262 { [0] = ule_test_sndu, [1] = ule_bridged_sndu, [2] = NULL, };
263
264 /* Table of optional extension header handlers. The header type is the index. */
265 static int (*ule_optional_ext_handlers[255])( struct dvb_net_priv *p ) =
266 { [0] = ule_exthdr_padding, [1] = NULL, };
267
268 int ext_len = 0;
269 unsigned char hlen = (p->ule_sndu_type & 0x0700) >> 8;
270 unsigned char htype = p->ule_sndu_type & 0x00FF;
271
272 /* Discriminate mandatory and optional extension headers. */
273 if (hlen == 0) {
274 /* Mandatory extension header */
275 if (ule_mandatory_ext_handlers[htype]) {
276 ext_len = ule_mandatory_ext_handlers[htype]( p );
277 if(ext_len >= 0) {
278 p->ule_next_hdr += ext_len;
279 if (!p->ule_bridged) {
280 p->ule_sndu_type = ntohs(*(unsigned short *)p->ule_next_hdr);
281 p->ule_next_hdr += 2;
282 } else {
283 p->ule_sndu_type = ntohs(*(unsigned short *)(p->ule_next_hdr + ((p->ule_dbit ? 2 : 3) * ETH_ALEN)));
284 /* This assures the extension handling loop will terminate. */
285 }
286 }
287 // else: extension handler failed or SNDU should be discarded
288 } else
289 ext_len = -1; /* SNDU has to be discarded. */
290 } else {
291 /* Optional extension header. Calculate the length. */
292 ext_len = hlen << 1;
293 /* Process the optional extension header according to its type. */
294 if (ule_optional_ext_handlers[htype])
295 (void)ule_optional_ext_handlers[htype]( p );
296 p->ule_next_hdr += ext_len;
297 p->ule_sndu_type = ntohs( *(unsigned short *)(p->ule_next_hdr-2) );
298 /*
299 * note: the length of the next header type is included in the
300 * length of THIS optional extension header
301 */
302 }
303
304 return ext_len;
305 }
306
307 static int handle_ule_extensions( struct dvb_net_priv *p )
308 {
309 int total_ext_len = 0, l;
310
311 p->ule_next_hdr = p->ule_skb->data;
312 do {
313 l = handle_one_ule_extension( p );
314 if (l < 0)
315 return l; /* Stop extension header processing and discard SNDU. */
316 total_ext_len += l;
317 #ifdef ULE_DEBUG
318 dprintk("handle_ule_extensions: ule_next_hdr=%p, ule_sndu_type=%i, "
319 "l=%i, total_ext_len=%i\n", p->ule_next_hdr,
320 (int) p->ule_sndu_type, l, total_ext_len);
321 #endif
322
323 } while (p->ule_sndu_type < 1536);
324
325 return total_ext_len;
326 }
327
328
329 /** Prepare for a new ULE SNDU: reset the decoder state. */
330 static inline void reset_ule( struct dvb_net_priv *p )
331 {
332 p->ule_skb = NULL;
333 p->ule_next_hdr = NULL;
334 p->ule_sndu_len = 0;
335 p->ule_sndu_type = 0;
336 p->ule_sndu_type_1 = 0;
337 p->ule_sndu_remain = 0;
338 p->ule_dbit = 0xFF;
339 p->ule_bridged = 0;
340 }
341
342 /**
343 * Decode ULE SNDUs according to draft-ietf-ipdvb-ule-03.txt from a sequence of
344 * TS cells of a single PID.
345 */
346 static void dvb_net_ule( struct net_device *dev, const u8 *buf, size_t buf_len )
347 {
348 struct dvb_net_priv *priv = dev->priv;
349 unsigned long skipped = 0L;
350 const u8 *ts, *ts_end, *from_where = NULL;
351 u8 ts_remain = 0, how_much = 0, new_ts = 1;
352 struct ethhdr *ethh = NULL;
353
354 #ifdef ULE_DEBUG
355 /* The code inside ULE_DEBUG keeps a history of the last 100 TS cells processed. */
356 static unsigned char ule_hist[100*TS_SZ];
357 static unsigned char *ule_where = ule_hist, ule_dump = 0;
358 #endif
359
360 /* For all TS cells in current buffer.
361 * Appearently, we are called for every single TS cell.
362 */
363 for (ts = buf, ts_end = buf + buf_len; ts < ts_end; /* no default incr. */ ) {
364
365 if (new_ts) {
366 /* We are about to process a new TS cell. */
367
368 #ifdef ULE_DEBUG
369 if (ule_where >= &ule_hist[100*TS_SZ]) ule_where = ule_hist;
370 memcpy( ule_where, ts, TS_SZ );
371 if (ule_dump) {
372 hexdump( ule_where, TS_SZ );
373 ule_dump = 0;
374 }
375 ule_where += TS_SZ;
376 #endif
377
378 /* Check TS error conditions: sync_byte, transport_error_indicator, scrambling_control . */
379 if ((ts[0] != TS_SYNC) || (ts[1] & TS_TEI) || ((ts[3] & TS_SC) != 0)) {
380 printk(KERN_WARNING "%lu: Invalid TS cell: SYNC %#x, TEI %u, SC %#x.\n",
381 priv->ts_count, ts[0], ts[1] & TS_TEI >> 7, ts[3] & 0xC0 >> 6);
382
383 /* Drop partly decoded SNDU, reset state, resync on PUSI. */
384 if (priv->ule_skb) {
385 dev_kfree_skb( priv->ule_skb );
386 /* Prepare for next SNDU. */
387 priv->stats.rx_errors++;
388 priv->stats.rx_frame_errors++;
389 }
390 reset_ule(priv);
391 priv->need_pusi = 1;
392
393 /* Continue with next TS cell. */
394 ts += TS_SZ;
395 priv->ts_count++;
396 continue;
397 }
398
399 ts_remain = 184;
400 from_where = ts + 4;
401 }
402 /* Synchronize on PUSI, if required. */
403 if (priv->need_pusi) {
404 if (ts[1] & TS_PUSI) {
405 /* Find beginning of first ULE SNDU in current TS cell. */
406 /* Synchronize continuity counter. */
407 priv->tscc = ts[3] & 0x0F;
408 /* There is a pointer field here. */
409 if (ts[4] > ts_remain) {
410 printk(KERN_ERR "%lu: Invalid ULE packet "
411 "(pointer field %d)\n", priv->ts_count, ts[4]);
412 ts += TS_SZ;
413 priv->ts_count++;
414 continue;
415 }
416 /* Skip to destination of pointer field. */
417 from_where = &ts[5] + ts[4];
418 ts_remain -= 1 + ts[4];
419 skipped = 0;
420 } else {
421 skipped++;
422 ts += TS_SZ;
423 priv->ts_count++;
424 continue;
425 }
426 }
427
428 if (new_ts) {
429 /* Check continuity counter. */
430 if ((ts[3] & 0x0F) == priv->tscc)
431 priv->tscc = (priv->tscc + 1) & 0x0F;
432 else {
433 /* TS discontinuity handling: */
434 printk(KERN_WARNING "%lu: TS discontinuity: got %#x, "
435 "expected %#x.\n", priv->ts_count, ts[3] & 0x0F, priv->tscc);
436 /* Drop partly decoded SNDU, reset state, resync on PUSI. */
437 if (priv->ule_skb) {
438 dev_kfree_skb( priv->ule_skb );
439 /* Prepare for next SNDU. */
440 // reset_ule(priv); moved to below.
441 priv->stats.rx_errors++;
442 priv->stats.rx_frame_errors++;
443 }
444 reset_ule(priv);
445 /* skip to next PUSI. */
446 priv->need_pusi = 1;
447 continue;
448 }
449 /* If we still have an incomplete payload, but PUSI is
450 * set; some TS cells are missing.
451 * This is only possible here, if we missed exactly 16 TS
452 * cells (continuity counter wrap). */
453 if (ts[1] & TS_PUSI) {
454 if (! priv->need_pusi) {
455 if (!(*from_where < (ts_remain-1)) || *from_where != priv->ule_sndu_remain) {
456 /* Pointer field is invalid. Drop this TS cell and any started ULE SNDU. */
457 printk(KERN_WARNING "%lu: Invalid pointer "
458 "field: %u.\n", priv->ts_count, *from_where);
459
460 /* Drop partly decoded SNDU, reset state, resync on PUSI. */
461 if (priv->ule_skb) {
462 dev_kfree_skb( priv->ule_skb );
463 ((struct dvb_net_priv *) dev->priv)->stats.rx_errors++;
464 ((struct dvb_net_priv *) dev->priv)->stats.rx_frame_errors++;
465 }
466 reset_ule(priv);
467 priv->need_pusi = 1;
468 continue;
469 }
470 /* Skip pointer field (we're processing a
471 * packed payload). */
472 from_where += 1;
473 ts_remain -= 1;
474 } else
475 priv->need_pusi = 0;
476
477 if (priv->ule_sndu_remain > 183) {
478 /* Current SNDU lacks more data than there could be available in the
479 * current TS cell. */
480 priv->stats.rx_errors++;
481 priv->stats.rx_length_errors++;
482 printk(KERN_WARNING "%lu: Expected %d more SNDU bytes, but "
483 "got PUSI (pf %d, ts_remain %d). Flushing incomplete payload.\n",
484 priv->ts_count, priv->ule_sndu_remain, ts[4], ts_remain);
485 dev_kfree_skb(priv->ule_skb);
486 /* Prepare for next SNDU. */
487 reset_ule(priv);
488 /* Resync: go to where pointer field points to: start of next ULE SNDU. */
489 from_where += ts[4];
490 ts_remain -= ts[4];
491 }
492 }
493 }
494
495 /* Check if new payload needs to be started. */
496 if (priv->ule_skb == NULL) {
497 /* Start a new payload with skb.
498 * Find ULE header. It is only guaranteed that the
499 * length field (2 bytes) is contained in the current
500 * TS.
501 * Check ts_remain has to be >= 2 here. */
502 if (ts_remain < 2) {
503 printk(KERN_WARNING "Invalid payload packing: only %d "
504 "bytes left in TS. Resyncing.\n", ts_remain);
505 priv->ule_sndu_len = 0;
506 priv->need_pusi = 1;
507 continue;
508 }
509
510 if (! priv->ule_sndu_len) {
511 /* Got at least two bytes, thus extrace the SNDU length. */
512 priv->ule_sndu_len = from_where[0] << 8 | from_where[1];
513 if (priv->ule_sndu_len & 0x8000) {
514 /* D-Bit is set: no dest mac present. */
515 priv->ule_sndu_len &= 0x7FFF;
516 priv->ule_dbit = 1;
517 } else
518 priv->ule_dbit = 0;
519
520 if (priv->ule_sndu_len < 5) {
521 printk(KERN_WARNING "%lu: Invalid ULE SNDU length %u. "
522 "Resyncing.\n", priv->ts_count, priv->ule_sndu_len);
523 priv->stats.rx_errors++;
524 priv->stats.rx_length_errors++;
525 priv->ule_sndu_len = 0;
526 priv->need_pusi = 1;
527 new_ts = 1;
528 ts += TS_SZ;
529 priv->ts_count++;
530 continue;
531 }
532 ts_remain -= 2; /* consume the 2 bytes SNDU length. */
533 from_where += 2;
534 }
535
536 /*
537 * State of current TS:
538 * ts_remain (remaining bytes in the current TS cell)
539 * 0 ule_type is not available now, we need the next TS cell
540 * 1 the first byte of the ule_type is present
541 * >=2 full ULE header present, maybe some payload data as well.
542 */
543 switch (ts_remain) {
544 case 1:
545 priv->ule_sndu_type = from_where[0] << 8;
546 priv->ule_sndu_type_1 = 1; /* first byte of ule_type is set. */
547 ts_remain -= 1; from_where += 1;
548 /* Continue w/ next TS. */
549 case 0:
550 new_ts = 1;
551 ts += TS_SZ;
552 priv->ts_count++;
553 continue;
554
555 default: /* complete ULE header is present in current TS. */
556 /* Extract ULE type field. */
557 if (priv->ule_sndu_type_1) {
558 priv->ule_sndu_type |= from_where[0];
559 from_where += 1; /* points to payload start. */
560 ts_remain -= 1;
561 } else {
562 /* Complete type is present in new TS. */
563 priv->ule_sndu_type = from_where[0] << 8 | from_where[1];
564 from_where += 2; /* points to payload start. */
565 ts_remain -= 2;
566 }
567 break;
568 }
569
570 /* Allocate the skb (decoder target buffer) with the correct size, as follows:
571 * prepare for the largest case: bridged SNDU with MAC address (dbit = 0). */
572 priv->ule_skb = dev_alloc_skb( priv->ule_sndu_len + ETH_HLEN + ETH_ALEN );
573 if (priv->ule_skb == NULL) {
574 printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n",
575 dev->name);
576 ((struct dvb_net_priv *)dev->priv)->stats.rx_dropped++;
577 return;
578 }
579
580 /* This includes the CRC32 _and_ dest mac, if !dbit. */
581 priv->ule_sndu_remain = priv->ule_sndu_len;
582 priv->ule_skb->dev = dev;
583 /* Leave space for Ethernet or bridged SNDU header (eth hdr plus one MAC addr). */
584 skb_reserve( priv->ule_skb, ETH_HLEN + ETH_ALEN );
585 }
586
587 /* Copy data into our current skb. */
588 how_much = min(priv->ule_sndu_remain, (int)ts_remain);
589 memcpy(skb_put(priv->ule_skb, how_much), from_where, how_much);
590 priv->ule_sndu_remain -= how_much;
591 ts_remain -= how_much;
592 from_where += how_much;
593
594 /* Check for complete payload. */
595 if (priv->ule_sndu_remain <= 0) {
596 /* Check CRC32, we've got it in our skb already. */
597 unsigned short ulen = htons(priv->ule_sndu_len);
598 unsigned short utype = htons(priv->ule_sndu_type);
599 const u8 *tail;
600 struct kvec iov[3] = {
601 { &ulen, sizeof ulen },
602 { &utype, sizeof utype },
603 { priv->ule_skb->data, priv->ule_skb->len - 4 }
604 };
605 u32 ule_crc = ~0L, expected_crc;
606 if (priv->ule_dbit) {
607 /* Set D-bit for CRC32 verification,
608 * if it was set originally. */
609 ulen |= 0x0080;
610 }
611
612 ule_crc = iov_crc32(ule_crc, iov, 3);
613 tail = skb_tail_pointer(priv->ule_skb);
614 expected_crc = *(tail - 4) << 24 |
615 *(tail - 3) << 16 |
616 *(tail - 2) << 8 |
617 *(tail - 1);
618 if (ule_crc != expected_crc) {
619 printk(KERN_WARNING "%lu: CRC32 check FAILED: %08x / %08x, SNDU len %d type %#x, ts_remain %d, next 2: %x.\n",
620 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);
621
622 #ifdef ULE_DEBUG
623 hexdump( iov[0].iov_base, iov[0].iov_len );
624 hexdump( iov[1].iov_base, iov[1].iov_len );
625 hexdump( iov[2].iov_base, iov[2].iov_len );
626
627 if (ule_where == ule_hist) {
628 hexdump( &ule_hist[98*TS_SZ], TS_SZ );
629 hexdump( &ule_hist[99*TS_SZ], TS_SZ );
630 } else if (ule_where == &ule_hist[TS_SZ]) {
631 hexdump( &ule_hist[99*TS_SZ], TS_SZ );
632 hexdump( ule_hist, TS_SZ );
633 } else {
634 hexdump( ule_where - TS_SZ - TS_SZ, TS_SZ );
635 hexdump( ule_where - TS_SZ, TS_SZ );
636 }
637 ule_dump = 1;
638 #endif
639
640 priv->stats.rx_errors++;
641 priv->stats.rx_crc_errors++;
642 dev_kfree_skb(priv->ule_skb);
643 } else {
644 /* CRC32 verified OK. */
645 u8 dest_addr[ETH_ALEN];
646 static const u8 bc_addr[ETH_ALEN] =
647 { [ 0 ... ETH_ALEN-1] = 0xff };
648
649 /* CRC32 was OK. Remove it from skb. */
650 priv->ule_skb->tail -= 4;
651 priv->ule_skb->len -= 4;
652
653 if (!priv->ule_dbit) {
654 /*
655 * The destination MAC address is the
656 * next data in the skb. It comes
657 * before any extension headers.
658 *
659 * Check if the payload of this SNDU
660 * should be passed up the stack.
661 */
662 register int drop = 0;
663 if (priv->rx_mode != RX_MODE_PROMISC) {
664 if (priv->ule_skb->data[0] & 0x01) {
665 /* multicast or broadcast */
666 if (memcmp(priv->ule_skb->data, bc_addr, ETH_ALEN)) {
667 /* multicast */
668 if (priv->rx_mode == RX_MODE_MULTI) {
669 int i;
670 for(i = 0; i < priv->multi_num && memcmp(priv->ule_skb->data, priv->multi_macs[i], ETH_ALEN); i++)
671 ;
672 if (i == priv->multi_num)
673 drop = 1;
674 } else if (priv->rx_mode != RX_MODE_ALL_MULTI)
675 drop = 1; /* no broadcast; */
676 /* else: all multicast mode: accept all multicast packets */
677 }
678 /* else: broadcast */
679 }
680 else if (memcmp(priv->ule_skb->data, dev->dev_addr, ETH_ALEN))
681 drop = 1;
682 /* else: destination address matches the MAC address of our receiver device */
683 }
684 /* else: promiscious mode; pass everything up the stack */
685
686 if (drop) {
687 #ifdef ULE_DEBUG
688 dprintk("Dropping SNDU: MAC destination address does not match: dest addr: "MAC_ADDR_PRINTFMT", dev addr: "MAC_ADDR_PRINTFMT"\n",
689 MAX_ADDR_PRINTFMT_ARGS(priv->ule_skb->data), MAX_ADDR_PRINTFMT_ARGS(dev->dev_addr));
690 #endif
691 dev_kfree_skb(priv->ule_skb);
692 goto sndu_done;
693 }
694 else
695 {
696 skb_copy_from_linear_data(priv->ule_skb,
697 dest_addr,
698 ETH_ALEN);
699 skb_pull(priv->ule_skb, ETH_ALEN);
700 }
701 }
702
703 /* Handle ULE Extension Headers. */
704 if (priv->ule_sndu_type < 1536) {
705 /* There is an extension header. Handle it accordingly. */
706 int l = handle_ule_extensions(priv);
707 if (l < 0) {
708 /* Mandatory extension header unknown or TEST SNDU. Drop it. */
709 // printk( KERN_WARNING "Dropping SNDU, extension headers.\n" );
710 dev_kfree_skb(priv->ule_skb);
711 goto sndu_done;
712 }
713 skb_pull(priv->ule_skb, l);
714 }
715
716 /*
717 * Construct/assure correct ethernet header.
718 * Note: in bridged mode (priv->ule_bridged !=
719 * 0) we already have the (original) ethernet
720 * header at the start of the payload (after
721 * optional dest. address and any extension
722 * headers).
723 */
724
725 if (!priv->ule_bridged) {
726 skb_push(priv->ule_skb, ETH_HLEN);
727 ethh = (struct ethhdr *)priv->ule_skb->data;
728 if (!priv->ule_dbit) {
729 /* dest_addr buffer is only valid if priv->ule_dbit == 0 */
730 memcpy(ethh->h_dest, dest_addr, ETH_ALEN);
731 memset(ethh->h_source, 0, ETH_ALEN);
732 }
733 else /* zeroize source and dest */
734 memset( ethh, 0, ETH_ALEN*2 );
735
736 ethh->h_proto = htons(priv->ule_sndu_type);
737 }
738 /* else: skb is in correct state; nothing to do. */
739 priv->ule_bridged = 0;
740
741 /* Stuff into kernel's protocol stack. */
742 priv->ule_skb->protocol = dvb_net_eth_type_trans(priv->ule_skb, dev);
743 /* If D-bit is set (i.e. destination MAC address not present),
744 * receive the packet anyhow. */
745 /* if (priv->ule_dbit && skb->pkt_type == PACKET_OTHERHOST)
746 priv->ule_skb->pkt_type = PACKET_HOST; */
747 priv->stats.rx_packets++;
748 priv->stats.rx_bytes += priv->ule_skb->len;
749 netif_rx(priv->ule_skb);
750 }
751 sndu_done:
752 /* Prepare for next SNDU. */
753 reset_ule(priv);
754 }
755
756 /* More data in current TS (look at the bytes following the CRC32)? */
757 if (ts_remain >= 2 && *((unsigned short *)from_where) != 0xFFFF) {
758 /* Next ULE SNDU starts right there. */
759 new_ts = 0;
760 priv->ule_skb = NULL;
761 priv->ule_sndu_type_1 = 0;
762 priv->ule_sndu_len = 0;
763 // printk(KERN_WARNING "More data in current TS: [%#x %#x %#x %#x]\n",
764 // *(from_where + 0), *(from_where + 1),
765 // *(from_where + 2), *(from_where + 3));
766 // printk(KERN_WARNING "ts @ %p, stopped @ %p:\n", ts, from_where + 0);
767 // hexdump(ts, 188);
768 } else {
769 new_ts = 1;
770 ts += TS_SZ;
771 priv->ts_count++;
772 if (priv->ule_skb == NULL) {
773 priv->need_pusi = 1;
774 priv->ule_sndu_type_1 = 0;
775 priv->ule_sndu_len = 0;
776 }
777 }
778 } /* for all available TS cells */
779 }
780
781 static int dvb_net_ts_callback(const u8 *buffer1, size_t buffer1_len,
782 const u8 *buffer2, size_t buffer2_len,
783 struct dmx_ts_feed *feed, enum dmx_success success)
784 {
785 struct net_device *dev = feed->priv;
786
787 if (buffer2 != 0)
788 printk(KERN_WARNING "buffer2 not 0: %p.\n", buffer2);
789 if (buffer1_len > 32768)
790 printk(KERN_WARNING "length > 32k: %zu.\n", buffer1_len);
791 /* printk("TS callback: %u bytes, %u TS cells @ %p.\n",
792 buffer1_len, buffer1_len / TS_SZ, buffer1); */
793 dvb_net_ule(dev, buffer1, buffer1_len);
794 return 0;
795 }
796
797
798 static void dvb_net_sec(struct net_device *dev,
799 const u8 *pkt, int pkt_len)
800 {
801 u8 *eth;
802 struct sk_buff *skb;
803 struct net_device_stats *stats = &(((struct dvb_net_priv *) dev->priv)->stats);
804 int snap = 0;
805
806 /* note: pkt_len includes a 32bit checksum */
807 if (pkt_len < 16) {
808 printk("%s: IP/MPE packet length = %d too small.\n",
809 dev->name, pkt_len);
810 stats->rx_errors++;
811 stats->rx_length_errors++;
812 return;
813 }
814 /* it seems some ISPs manage to screw up here, so we have to
815 * relax the error checks... */
816 #if 0
817 if ((pkt[5] & 0xfd) != 0xc1) {
818 /* drop scrambled or broken packets */
819 #else
820 if ((pkt[5] & 0x3c) != 0x00) {
821 /* drop scrambled */
822 #endif
823 stats->rx_errors++;
824 stats->rx_crc_errors++;
825 return;
826 }
827 if (pkt[5] & 0x02) {
828 /* handle LLC/SNAP, see rfc-1042 */
829 if (pkt_len < 24 || memcmp(&pkt[12], "\xaa\xaa\x03\0\0\0", 6)) {
830 stats->rx_dropped++;
831 return;
832 }
833 snap = 8;
834 }
835 if (pkt[7]) {
836 /* FIXME: assemble datagram from multiple sections */
837 stats->rx_errors++;
838 stats->rx_frame_errors++;
839 return;
840 }
841
842 /* we have 14 byte ethernet header (ip header follows);
843 * 12 byte MPE header; 4 byte checksum; + 2 byte alignment, 8 byte LLC/SNAP
844 */
845 if (!(skb = dev_alloc_skb(pkt_len - 4 - 12 + 14 + 2 - snap))) {
846 //printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n", dev->name);
847 stats->rx_dropped++;
848 return;
849 }
850 skb_reserve(skb, 2); /* longword align L3 header */
851 skb->dev = dev;
852
853 /* copy L3 payload */
854 eth = (u8 *) skb_put(skb, pkt_len - 12 - 4 + 14 - snap);
855 memcpy(eth + 14, pkt + 12 + snap, pkt_len - 12 - 4 - snap);
856
857 /* create ethernet header: */
858 eth[0]=pkt[0x0b];
859 eth[1]=pkt[0x0a];
860 eth[2]=pkt[0x09];
861 eth[3]=pkt[0x08];
862 eth[4]=pkt[0x04];
863 eth[5]=pkt[0x03];
864
865 eth[6]=eth[7]=eth[8]=eth[9]=eth[10]=eth[11]=0;
866
867 if (snap) {
868 eth[12] = pkt[18];
869 eth[13] = pkt[19];
870 } else {
871 /* protocol numbers are from rfc-1700 or
872 * http://www.iana.org/assignments/ethernet-numbers
873 */
874 if (pkt[12] >> 4 == 6) { /* version field from IP header */
875 eth[12] = 0x86; /* IPv6 */
876 eth[13] = 0xdd;
877 } else {
878 eth[12] = 0x08; /* IPv4 */
879 eth[13] = 0x00;
880 }
881 }
882
883 skb->protocol = dvb_net_eth_type_trans(skb, dev);
884
885 stats->rx_packets++;
886 stats->rx_bytes+=skb->len;
887 netif_rx(skb);
888 }
889
890 static int dvb_net_sec_callback(const u8 *buffer1, size_t buffer1_len,
891 const u8 *buffer2, size_t buffer2_len,
892 struct dmx_section_filter *filter,
893 enum dmx_success success)
894 {
895 struct net_device *dev = filter->priv;
896
897 /**
898 * we rely on the DVB API definition where exactly one complete
899 * section is delivered in buffer1
900 */
901 dvb_net_sec (dev, buffer1, buffer1_len);
902 return 0;
903 }
904
905 static int dvb_net_tx(struct sk_buff *skb, struct net_device *dev)
906 {
907 dev_kfree_skb(skb);
908 return 0;
909 }
910
911 static u8 mask_normal[6]={0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
912 static u8 mask_allmulti[6]={0xff, 0xff, 0xff, 0x00, 0x00, 0x00};
913 static u8 mac_allmulti[6]={0x01, 0x00, 0x5e, 0x00, 0x00, 0x00};
914 static u8 mask_promisc[6]={0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
915
916 static int dvb_net_filter_sec_set(struct net_device *dev,
917 struct dmx_section_filter **secfilter,
918 u8 *mac, u8 *mac_mask)
919 {
920 struct dvb_net_priv *priv = dev->priv;
921 int ret;
922
923 *secfilter=NULL;
924 ret = priv->secfeed->allocate_filter(priv->secfeed, secfilter);
925 if (ret<0) {
926 printk("%s: could not get filter\n", dev->name);
927 return ret;
928 }
929
930 (*secfilter)->priv=(void *) dev;
931
932 memset((*secfilter)->filter_value, 0x00, DMX_MAX_FILTER_SIZE);
933 memset((*secfilter)->filter_mask, 0x00, DMX_MAX_FILTER_SIZE);
934 memset((*secfilter)->filter_mode, 0xff, DMX_MAX_FILTER_SIZE);
935
936 (*secfilter)->filter_value[0]=0x3e;
937 (*secfilter)->filter_value[3]=mac[5];
938 (*secfilter)->filter_value[4]=mac[4];
939 (*secfilter)->filter_value[8]=mac[3];
940 (*secfilter)->filter_value[9]=mac[2];
941 (*secfilter)->filter_value[10]=mac[1];
942 (*secfilter)->filter_value[11]=mac[0];
943
944 (*secfilter)->filter_mask[0] = 0xff;
945 (*secfilter)->filter_mask[3] = mac_mask[5];
946 (*secfilter)->filter_mask[4] = mac_mask[4];
947 (*secfilter)->filter_mask[8] = mac_mask[3];
948 (*secfilter)->filter_mask[9] = mac_mask[2];
949 (*secfilter)->filter_mask[10] = mac_mask[1];
950 (*secfilter)->filter_mask[11]=mac_mask[0];
951
952 dprintk("%s: filter mac=%02x %02x %02x %02x %02x %02x\n",
953 dev->name, mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
954 dprintk("%s: filter mask=%02x %02x %02x %02x %02x %02x\n",
955 dev->name, mac_mask[0], mac_mask[1], mac_mask[2],
956 mac_mask[3], mac_mask[4], mac_mask[5]);
957
958 return 0;
959 }
960
961 static int dvb_net_feed_start(struct net_device *dev)
962 {
963 int ret = 0, i;
964 struct dvb_net_priv *priv = dev->priv;
965 struct dmx_demux *demux = priv->demux;
966 unsigned char *mac = (unsigned char *) dev->dev_addr;
967
968 dprintk("%s: rx_mode %i\n", __FUNCTION__, priv->rx_mode);
969 mutex_lock(&priv->mutex);
970 if (priv->tsfeed || priv->secfeed || priv->secfilter || priv->multi_secfilter[0])
971 printk("%s: BUG %d\n", __FUNCTION__, __LINE__);
972
973 priv->secfeed=NULL;
974 priv->secfilter=NULL;
975 priv->tsfeed = NULL;
976
977 if (priv->feedtype == DVB_NET_FEEDTYPE_MPE) {
978 dprintk("%s: alloc secfeed\n", __FUNCTION__);
979 ret=demux->allocate_section_feed(demux, &priv->secfeed,
980 dvb_net_sec_callback);
981 if (ret<0) {
982 printk("%s: could not allocate section feed\n", dev->name);
983 goto error;
984 }
985
986 ret = priv->secfeed->set(priv->secfeed, priv->pid, 32768, 1);
987
988 if (ret<0) {
989 printk("%s: could not set section feed\n", dev->name);
990 priv->demux->release_section_feed(priv->demux, priv->secfeed);
991 priv->secfeed=NULL;
992 goto error;
993 }
994
995 if (priv->rx_mode != RX_MODE_PROMISC) {
996 dprintk("%s: set secfilter\n", __FUNCTION__);
997 dvb_net_filter_sec_set(dev, &priv->secfilter, mac, mask_normal);
998 }
999
1000 switch (priv->rx_mode) {
1001 case RX_MODE_MULTI:
1002 for (i = 0; i < priv->multi_num; i++) {
1003 dprintk("%s: set multi_secfilter[%d]\n", __FUNCTION__, i);
1004 dvb_net_filter_sec_set(dev, &priv->multi_secfilter[i],
1005 priv->multi_macs[i], mask_normal);
1006 }
1007 break;
1008 case RX_MODE_ALL_MULTI:
1009 priv->multi_num=1;
1010 dprintk("%s: set multi_secfilter[0]\n", __FUNCTION__);
1011 dvb_net_filter_sec_set(dev, &priv->multi_secfilter[0],
1012 mac_allmulti, mask_allmulti);
1013 break;
1014 case RX_MODE_PROMISC:
1015 priv->multi_num=0;
1016 dprintk("%s: set secfilter\n", __FUNCTION__);
1017 dvb_net_filter_sec_set(dev, &priv->secfilter, mac, mask_promisc);
1018 break;
1019 }
1020
1021 dprintk("%s: start filtering\n", __FUNCTION__);
1022 priv->secfeed->start_filtering(priv->secfeed);
1023 } else if (priv->feedtype == DVB_NET_FEEDTYPE_ULE) {
1024 struct timespec timeout = { 0, 10000000 }; // 10 msec
1025
1026 /* we have payloads encapsulated in TS */
1027 dprintk("%s: alloc tsfeed\n", __FUNCTION__);
1028 ret = demux->allocate_ts_feed(demux, &priv->tsfeed, dvb_net_ts_callback);
1029 if (ret < 0) {
1030 printk("%s: could not allocate ts feed\n", dev->name);
1031 goto error;
1032 }
1033
1034 /* Set netdevice pointer for ts decaps callback. */
1035 priv->tsfeed->priv = (void *)dev;
1036 ret = priv->tsfeed->set(priv->tsfeed,
1037 priv->pid, /* pid */
1038 TS_PACKET, /* type */
1039 DMX_TS_PES_OTHER, /* pes type */
1040 32768, /* circular buffer size */
1041 timeout /* timeout */
1042 );
1043
1044 if (ret < 0) {
1045 printk("%s: could not set ts feed\n", dev->name);
1046 priv->demux->release_ts_feed(priv->demux, priv->tsfeed);
1047 priv->tsfeed = NULL;
1048 goto error;
1049 }
1050
1051 dprintk("%s: start filtering\n", __FUNCTION__);
1052 priv->tsfeed->start_filtering(priv->tsfeed);
1053 } else
1054 ret = -EINVAL;
1055
1056 error:
1057 mutex_unlock(&priv->mutex);
1058 return ret;
1059 }
1060
1061 static int dvb_net_feed_stop(struct net_device *dev)
1062 {
1063 struct dvb_net_priv *priv = dev->priv;
1064 int i, ret = 0;
1065
1066 dprintk("%s\n", __FUNCTION__);
1067 mutex_lock(&priv->mutex);
1068 if (priv->feedtype == DVB_NET_FEEDTYPE_MPE) {
1069 if (priv->secfeed) {
1070 if (priv->secfeed->is_filtering) {
1071 dprintk("%s: stop secfeed\n", __FUNCTION__);
1072 priv->secfeed->stop_filtering(priv->secfeed);
1073 }
1074
1075 if (priv->secfilter) {
1076 dprintk("%s: release secfilter\n", __FUNCTION__);
1077 priv->secfeed->release_filter(priv->secfeed,
1078 priv->secfilter);
1079 priv->secfilter=NULL;
1080 }
1081
1082 for (i=0; i<priv->multi_num; i++) {
1083 if (priv->multi_secfilter[i]) {
1084 dprintk("%s: release multi_filter[%d]\n",
1085 __FUNCTION__, i);
1086 priv->secfeed->release_filter(priv->secfeed,
1087 priv->multi_secfilter[i]);
1088 priv->multi_secfilter[i] = NULL;
1089 }
1090 }
1091
1092 priv->demux->release_section_feed(priv->demux, priv->secfeed);
1093 priv->secfeed = NULL;
1094 } else
1095 printk("%s: no feed to stop\n", dev->name);
1096 } else if (priv->feedtype == DVB_NET_FEEDTYPE_ULE) {
1097 if (priv->tsfeed) {
1098 if (priv->tsfeed->is_filtering) {
1099 dprintk("%s: stop tsfeed\n", __FUNCTION__);
1100 priv->tsfeed->stop_filtering(priv->tsfeed);
1101 }
1102 priv->demux->release_ts_feed(priv->demux, priv->tsfeed);
1103 priv->tsfeed = NULL;
1104 }
1105 else
1106 printk("%s: no ts feed to stop\n", dev->name);
1107 } else
1108 ret = -EINVAL;
1109 mutex_unlock(&priv->mutex);
1110 return ret;
1111 }
1112
1113
1114 static int dvb_set_mc_filter (struct net_device *dev, struct dev_mc_list *mc)
1115 {
1116 struct dvb_net_priv *priv = dev->priv;
1117
1118 if (priv->multi_num == DVB_NET_MULTICAST_MAX)
1119 return -ENOMEM;
1120
1121 memcpy(priv->multi_macs[priv->multi_num], mc->dmi_addr, 6);
1122
1123 priv->multi_num++;
1124 return 0;
1125 }
1126
1127
1128 static void wq_set_multicast_list (struct work_struct *work)
1129 {
1130 struct dvb_net_priv *priv =
1131 container_of(work, struct dvb_net_priv, set_multicast_list_wq);
1132 struct net_device *dev = priv->net;
1133
1134 dvb_net_feed_stop(dev);
1135 priv->rx_mode = RX_MODE_UNI;
1136 netif_tx_lock_bh(dev);
1137
1138 if (dev->flags & IFF_PROMISC) {
1139 dprintk("%s: promiscuous mode\n", dev->name);
1140 priv->rx_mode = RX_MODE_PROMISC;
1141 } else if ((dev->flags & IFF_ALLMULTI)) {
1142 dprintk("%s: allmulti mode\n", dev->name);
1143 priv->rx_mode = RX_MODE_ALL_MULTI;
1144 } else if (dev->mc_count) {
1145 int mci;
1146 struct dev_mc_list *mc;
1147
1148 dprintk("%s: set_mc_list, %d entries\n",
1149 dev->name, dev->mc_count);
1150
1151 priv->rx_mode = RX_MODE_MULTI;
1152 priv->multi_num = 0;
1153
1154 for (mci = 0, mc=dev->mc_list;
1155 mci < dev->mc_count;
1156 mc = mc->next, mci++) {
1157 dvb_set_mc_filter(dev, mc);
1158 }
1159 }
1160
1161 netif_tx_unlock_bh(dev);
1162 dvb_net_feed_start(dev);
1163 }
1164
1165
1166 static void dvb_net_set_multicast_list (struct net_device *dev)
1167 {
1168 struct dvb_net_priv *priv = dev->priv;
1169 schedule_work(&priv->set_multicast_list_wq);
1170 }
1171
1172
1173 static void wq_restart_net_feed (struct work_struct *work)
1174 {
1175 struct dvb_net_priv *priv =
1176 container_of(work, struct dvb_net_priv, restart_net_feed_wq);
1177 struct net_device *dev = priv->net;
1178
1179 if (netif_running(dev)) {
1180 dvb_net_feed_stop(dev);
1181 dvb_net_feed_start(dev);
1182 }
1183 }
1184
1185
1186 static int dvb_net_set_mac (struct net_device *dev, void *p)
1187 {
1188 struct dvb_net_priv *priv = dev->priv;
1189 struct sockaddr *addr=p;
1190
1191 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1192
1193 if (netif_running(dev))
1194 schedule_work(&priv->restart_net_feed_wq);
1195
1196 return 0;
1197 }
1198
1199
1200 static int dvb_net_open(struct net_device *dev)
1201 {
1202 struct dvb_net_priv *priv = dev->priv;
1203
1204 priv->in_use++;
1205 dvb_net_feed_start(dev);
1206 return 0;
1207 }
1208
1209
1210 static int dvb_net_stop(struct net_device *dev)
1211 {
1212 struct dvb_net_priv *priv = dev->priv;
1213
1214 priv->in_use--;
1215 return dvb_net_feed_stop(dev);
1216 }
1217
1218 static struct net_device_stats * dvb_net_get_stats(struct net_device *dev)
1219 {
1220 return &((struct dvb_net_priv*) dev->priv)->stats;
1221 }
1222
1223 static const struct header_ops dvb_header_ops = {
1224 .create = eth_header,
1225 .parse = eth_header_parse,
1226 .rebuild = eth_rebuild_header,
1227 };
1228
1229 static void dvb_net_setup(struct net_device *dev)
1230 {
1231 ether_setup(dev);
1232
1233 dev->header_ops = &dvb_header_ops;
1234 dev->open = dvb_net_open;
1235 dev->stop = dvb_net_stop;
1236 dev->hard_start_xmit = dvb_net_tx;
1237 dev->get_stats = dvb_net_get_stats;
1238 dev->set_multicast_list = dvb_net_set_multicast_list;
1239 dev->set_mac_address = dvb_net_set_mac;
1240 dev->mtu = 4096;
1241 dev->mc_count = 0;
1242
1243 dev->flags |= IFF_NOARP;
1244 }
1245
1246 static int get_if(struct dvb_net *dvbnet)
1247 {
1248 int i;
1249
1250 for (i=0; i<DVB_NET_DEVICES_MAX; i++)
1251 if (!dvbnet->state[i])
1252 break;
1253
1254 if (i == DVB_NET_DEVICES_MAX)
1255 return -1;
1256
1257 dvbnet->state[i]=1;
1258 return i;
1259 }
1260
1261 static int dvb_net_add_if(struct dvb_net *dvbnet, u16 pid, u8 feedtype)
1262 {
1263 struct net_device *net;
1264 struct dvb_net_priv *priv;
1265 int result;
1266 int if_num;
1267
1268 if (feedtype != DVB_NET_FEEDTYPE_MPE && feedtype != DVB_NET_FEEDTYPE_ULE)
1269 return -EINVAL;
1270 if ((if_num = get_if(dvbnet)) < 0)
1271 return -EINVAL;
1272
1273 net = alloc_netdev(sizeof(struct dvb_net_priv), "dvb", dvb_net_setup);
1274 if (!net)
1275 return -ENOMEM;
1276
1277 if (dvbnet->dvbdev->id)
1278 snprintf(net->name, IFNAMSIZ, "dvb%d%u%d",
1279 dvbnet->dvbdev->adapter->num, dvbnet->dvbdev->id, if_num);
1280 else
1281 /* compatibility fix to keep dvb0_0 format */
1282 snprintf(net->name, IFNAMSIZ, "dvb%d_%d",
1283 dvbnet->dvbdev->adapter->num, if_num);
1284
1285 net->addr_len = 6;
1286 memcpy(net->dev_addr, dvbnet->dvbdev->adapter->proposed_mac, 6);
1287
1288 dvbnet->device[if_num] = net;
1289
1290 priv = net->priv;
1291 priv->net = net;
1292 priv->demux = dvbnet->demux;
1293 priv->pid = pid;
1294 priv->rx_mode = RX_MODE_UNI;
1295 priv->need_pusi = 1;
1296 priv->tscc = 0;
1297 priv->feedtype = feedtype;
1298 reset_ule(priv);
1299
1300 INIT_WORK(&priv->set_multicast_list_wq, wq_set_multicast_list);
1301 INIT_WORK(&priv->restart_net_feed_wq, wq_restart_net_feed);
1302 mutex_init(&priv->mutex);
1303
1304 net->base_addr = pid;
1305
1306 if ((result = register_netdev(net)) < 0) {
1307 dvbnet->device[if_num] = NULL;
1308 free_netdev(net);
1309 return result;
1310 }
1311 printk("dvb_net: created network interface %s\n", net->name);
1312
1313 return if_num;
1314 }
1315
1316 static int dvb_net_remove_if(struct dvb_net *dvbnet, unsigned long num)
1317 {
1318 struct net_device *net = dvbnet->device[num];
1319 struct dvb_net_priv *priv;
1320
1321 if (!dvbnet->state[num])
1322 return -EINVAL;
1323 priv = net->priv;
1324 if (priv->in_use)
1325 return -EBUSY;
1326
1327 dvb_net_stop(net);
1328 flush_scheduled_work();
1329 printk("dvb_net: removed network interface %s\n", net->name);
1330 unregister_netdev(net);
1331 dvbnet->state[num]=0;
1332 dvbnet->device[num] = NULL;
1333 free_netdev(net);
1334
1335 return 0;
1336 }
1337
1338 static int dvb_net_do_ioctl(struct inode *inode, struct file *file,
1339 unsigned int cmd, void *parg)
1340 {
1341 struct dvb_device *dvbdev = file->private_data;
1342 struct dvb_net *dvbnet = dvbdev->priv;
1343
1344 if (((file->f_flags&O_ACCMODE)==O_RDONLY))
1345 return -EPERM;
1346
1347 switch (cmd) {
1348 case NET_ADD_IF:
1349 {
1350 struct dvb_net_if *dvbnetif = parg;
1351 int result;
1352
1353 if (!capable(CAP_SYS_ADMIN))
1354 return -EPERM;
1355
1356 if (!try_module_get(dvbdev->adapter->module))
1357 return -EPERM;
1358
1359 result=dvb_net_add_if(dvbnet, dvbnetif->pid, dvbnetif->feedtype);
1360 if (result<0) {
1361 module_put(dvbdev->adapter->module);
1362 return result;
1363 }
1364 dvbnetif->if_num=result;
1365 break;
1366 }
1367 case NET_GET_IF:
1368 {
1369 struct net_device *netdev;
1370 struct dvb_net_priv *priv_data;
1371 struct dvb_net_if *dvbnetif = parg;
1372
1373 if (dvbnetif->if_num >= DVB_NET_DEVICES_MAX ||
1374 !dvbnet->state[dvbnetif->if_num])
1375 return -EINVAL;
1376
1377 netdev = dvbnet->device[dvbnetif->if_num];
1378
1379 priv_data = netdev->priv;
1380 dvbnetif->pid=priv_data->pid;
1381 dvbnetif->feedtype=priv_data->feedtype;
1382 break;
1383 }
1384 case NET_REMOVE_IF:
1385 {
1386 int ret;
1387
1388 if (!capable(CAP_SYS_ADMIN))
1389 return -EPERM;
1390 if ((unsigned long) parg >= DVB_NET_DEVICES_MAX)
1391 return -EINVAL;
1392 ret = dvb_net_remove_if(dvbnet, (unsigned long) parg);
1393 if (!ret)
1394 module_put(dvbdev->adapter->module);
1395 return ret;
1396 }
1397
1398 /* binary compatiblity cruft */
1399 case __NET_ADD_IF_OLD:
1400 {
1401 struct __dvb_net_if_old *dvbnetif = parg;
1402 int result;
1403
1404 if (!capable(CAP_SYS_ADMIN))
1405 return -EPERM;
1406
1407 if (!try_module_get(dvbdev->adapter->module))
1408 return -EPERM;
1409
1410 result=dvb_net_add_if(dvbnet, dvbnetif->pid, DVB_NET_FEEDTYPE_MPE);
1411 if (result<0) {
1412 module_put(dvbdev->adapter->module);
1413 return result;
1414 }
1415 dvbnetif->if_num=result;
1416 break;
1417 }
1418 case __NET_GET_IF_OLD:
1419 {
1420 struct net_device *netdev;
1421 struct dvb_net_priv *priv_data;
1422 struct __dvb_net_if_old *dvbnetif = parg;
1423
1424 if (dvbnetif->if_num >= DVB_NET_DEVICES_MAX ||
1425 !dvbnet->state[dvbnetif->if_num])
1426 return -EINVAL;
1427
1428 netdev = dvbnet->device[dvbnetif->if_num];
1429
1430 priv_data = netdev->priv;
1431 dvbnetif->pid=priv_data->pid;
1432 break;
1433 }
1434 default:
1435 return -ENOTTY;
1436 }
1437 return 0;
1438 }
1439
1440 static int dvb_net_ioctl(struct inode *inode, struct file *file,
1441 unsigned int cmd, unsigned long arg)
1442 {
1443 return dvb_usercopy(inode, file, cmd, arg, dvb_net_do_ioctl);
1444 }
1445
1446 static int dvb_net_close(struct inode *inode, struct file *file)
1447 {
1448 struct dvb_device *dvbdev = file->private_data;
1449 struct dvb_net *dvbnet = dvbdev->priv;
1450
1451 dvb_generic_release(inode, file);
1452
1453 if(dvbdev->users == 1 && dvbnet->exit == 1) {
1454 fops_put(file->f_op);
1455 file->f_op = NULL;
1456 wake_up(&dvbdev->wait_queue);
1457 }
1458 return 0;
1459 }
1460
1461
1462 static struct file_operations dvb_net_fops = {
1463 .owner = THIS_MODULE,
1464 .ioctl = dvb_net_ioctl,
1465 .open = dvb_generic_open,
1466 .release = dvb_net_close,
1467 };
1468
1469 static struct dvb_device dvbdev_net = {
1470 .priv = NULL,
1471 .users = 1,
1472 .writers = 1,
1473 .fops = &dvb_net_fops,
1474 };
1475
1476
1477 void dvb_net_release (struct dvb_net *dvbnet)
1478 {
1479 int i;
1480
1481 dvbnet->exit = 1;
1482 if (dvbnet->dvbdev->users < 1)
1483 wait_event(dvbnet->dvbdev->wait_queue,
1484 dvbnet->dvbdev->users==1);
1485
1486 dvb_unregister_device(dvbnet->dvbdev);
1487
1488 for (i=0; i<DVB_NET_DEVICES_MAX; i++) {
1489 if (!dvbnet->state[i])
1490 continue;
1491 dvb_net_remove_if(dvbnet, i);
1492 }
1493 }
1494 EXPORT_SYMBOL(dvb_net_release);
1495
1496
1497 int dvb_net_init (struct dvb_adapter *adap, struct dvb_net *dvbnet,
1498 struct dmx_demux *dmx)
1499 {
1500 int i;
1501
1502 dvbnet->demux = dmx;
1503
1504 for (i=0; i<DVB_NET_DEVICES_MAX; i++)
1505 dvbnet->state[i] = 0;
1506
1507 dvb_register_device (adap, &dvbnet->dvbdev, &dvbdev_net,
1508 dvbnet, DVB_DEVICE_NET);
1509
1510 return 0;
1511 }
1512 EXPORT_SYMBOL(dvb_net_init);
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