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dvb: Push down BKL into ioctl functions
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / media / dvb / dvb-core / dvb_net.c
1 /*
2 * dvb_net.c
3 *
4 * Copyright (C) 2001 Convergence integrated media GmbH
5 * Ralph Metzler <ralph@convergence.de>
6 * Copyright (C) 2002 Ralph Metzler <rjkm@metzlerbros.de>
7 *
8 * ULE Decapsulation code:
9 * Copyright (C) 2003, 2004 gcs - Global Communication & Services GmbH.
10 * and Department of Scientific Computing
11 * Paris Lodron University of Salzburg.
12 * Hilmar Linder <hlinder@cosy.sbg.ac.at>
13 * and Wolfram Stering <wstering@cosy.sbg.ac.at>
14 *
15 * ULE Decaps according to RFC 4326.
16 *
17 * This program is free software; you can redistribute it and/or
18 * modify it under the terms of the GNU General Public License
19 * as published by the Free Software Foundation; either version 2
20 * of the License, or (at your option) any later version.
21 *
22 * This program is distributed in the hope that it will be useful,
23 * but WITHOUT ANY WARRANTY; without even the implied warranty of
24 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
25 * GNU General Public License for more details.
26 *
27 * You should have received a copy of the GNU General Public License
28 * along with this program; if not, write to the Free Software
29 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
30 * Or, point your browser to http://www.gnu.org/copyleft/gpl.html
31 */
32
33 /*
34 * ULE ChangeLog:
35 * Feb 2004: hl/ws v1: Implementing draft-fair-ipdvb-ule-01.txt
36 *
37 * Dec 2004: hl/ws v2: Implementing draft-ietf-ipdvb-ule-03.txt:
38 * ULE Extension header handling.
39 * Bugreports by Moritz Vieth and Hanno Tersteegen,
40 * Fraunhofer Institute for Open Communication Systems
41 * Competence Center for Advanced Satellite Communications.
42 * Bugfixes and robustness improvements.
43 * Filtering on dest MAC addresses, if present (D-Bit = 0)
44 * ULE_DEBUG compile-time option.
45 * Apr 2006: cp v3: Bugfixes and compliency with RFC 4326 (ULE) by
46 * Christian Praehauser <cpraehaus@cosy.sbg.ac.at>,
47 * Paris Lodron University of Salzburg.
48 */
49
50 /*
51 * FIXME / TODO (dvb_net.c):
52 *
53 * Unloading does not work for 2.6.9 kernels: a refcount doesn't go to zero.
54 *
55 */
56
57 #include <linux/module.h>
58 #include <linux/kernel.h>
59 #include <linux/netdevice.h>
60 #include <linux/etherdevice.h>
61 #include <linux/dvb/net.h>
62 #include <linux/smp_lock.h>
63 #include <linux/uio.h>
64 #include <asm/uaccess.h>
65 #include <linux/crc32.h>
66 #include <linux/mutex.h>
67 #include <linux/sched.h>
68
69 #include "dvb_demux.h"
70 #include "dvb_net.h"
71
72 static int dvb_net_debug;
73 module_param(dvb_net_debug, int, 0444);
74 MODULE_PARM_DESC(dvb_net_debug, "enable debug messages");
75
76 #define dprintk(x...) do { if (dvb_net_debug) printk(x); } while (0)
77
78
79 static inline __u32 iov_crc32( __u32 c, struct kvec *iov, unsigned int cnt )
80 {
81 unsigned int j;
82 for (j = 0; j < cnt; j++)
83 c = crc32_be( c, iov[j].iov_base, iov[j].iov_len );
84 return c;
85 }
86
87
88 #define DVB_NET_MULTICAST_MAX 10
89
90 #undef ULE_DEBUG
91
92 #ifdef ULE_DEBUG
93
94 #define MAC_ADDR_PRINTFMT "%.2x:%.2x:%.2x:%.2x:%.2x:%.2x"
95 #define MAX_ADDR_PRINTFMT_ARGS(macap) (macap)[0],(macap)[1],(macap)[2],(macap)[3],(macap)[4],(macap)[5]
96
97 #define isprint(c) ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || (c >= '0' && c <= '9'))
98
99 static void hexdump( const unsigned char *buf, unsigned short len )
100 {
101 char str[80], octet[10];
102 int ofs, i, l;
103
104 for (ofs = 0; ofs < len; ofs += 16) {
105 sprintf( str, "%03d: ", ofs );
106
107 for (i = 0; i < 16; i++) {
108 if ((i + ofs) < len)
109 sprintf( octet, "%02x ", buf[ofs + i] );
110 else
111 strcpy( octet, " " );
112
113 strcat( str, octet );
114 }
115 strcat( str, " " );
116 l = strlen( str );
117
118 for (i = 0; (i < 16) && ((i + ofs) < len); i++)
119 str[l++] = isprint( buf[ofs + i] ) ? buf[ofs + i] : '.';
120
121 str[l] = '\0';
122 printk( KERN_WARNING "%s\n", str );
123 }
124 }
125
126 #endif
127
128 struct dvb_net_priv {
129 int in_use;
130 u16 pid;
131 struct net_device *net;
132 struct dvb_net *host;
133 struct dmx_demux *demux;
134 struct dmx_section_feed *secfeed;
135 struct dmx_section_filter *secfilter;
136 struct dmx_ts_feed *tsfeed;
137 int multi_num;
138 struct dmx_section_filter *multi_secfilter[DVB_NET_MULTICAST_MAX];
139 unsigned char multi_macs[DVB_NET_MULTICAST_MAX][6];
140 int rx_mode;
141 #define RX_MODE_UNI 0
142 #define RX_MODE_MULTI 1
143 #define RX_MODE_ALL_MULTI 2
144 #define RX_MODE_PROMISC 3
145 struct work_struct set_multicast_list_wq;
146 struct work_struct restart_net_feed_wq;
147 unsigned char feedtype; /* Either FEED_TYPE_ or FEED_TYPE_ULE */
148 int need_pusi; /* Set to 1, if synchronization on PUSI required. */
149 unsigned char tscc; /* TS continuity counter after sync on PUSI. */
150 struct sk_buff *ule_skb; /* ULE SNDU decodes into this buffer. */
151 unsigned char *ule_next_hdr; /* Pointer into skb to next ULE extension header. */
152 unsigned short ule_sndu_len; /* ULE SNDU length in bytes, w/o D-Bit. */
153 unsigned short ule_sndu_type; /* ULE SNDU type field, complete. */
154 unsigned char ule_sndu_type_1; /* ULE SNDU type field, if split across 2 TS cells. */
155 unsigned char ule_dbit; /* Whether the DestMAC address present
156 * or not (bit is set). */
157 unsigned char ule_bridged; /* Whether the ULE_BRIDGED extension header was found. */
158 int ule_sndu_remain; /* Nr. of bytes still required for current ULE SNDU. */
159 unsigned long ts_count; /* Current ts cell counter. */
160 struct mutex mutex;
161 };
162
163
164 /**
165 * Determine the packet's protocol ID. The rule here is that we
166 * assume 802.3 if the type field is short enough to be a length.
167 * This is normal practice and works for any 'now in use' protocol.
168 *
169 * stolen from eth.c out of the linux kernel, hacked for dvb-device
170 * by Michael Holzt <kju@debian.org>
171 */
172 static __be16 dvb_net_eth_type_trans(struct sk_buff *skb,
173 struct net_device *dev)
174 {
175 struct ethhdr *eth;
176 unsigned char *rawp;
177
178 skb_reset_mac_header(skb);
179 skb_pull(skb,dev->hard_header_len);
180 eth = eth_hdr(skb);
181
182 if (*eth->h_dest & 1) {
183 if(memcmp(eth->h_dest,dev->broadcast, ETH_ALEN)==0)
184 skb->pkt_type=PACKET_BROADCAST;
185 else
186 skb->pkt_type=PACKET_MULTICAST;
187 }
188
189 if (ntohs(eth->h_proto) >= 1536)
190 return eth->h_proto;
191
192 rawp = skb->data;
193
194 /**
195 * This is a magic hack to spot IPX packets. Older Novell breaks
196 * the protocol design and runs IPX over 802.3 without an 802.2 LLC
197 * layer. We look for FFFF which isn't a used 802.2 SSAP/DSAP. This
198 * won't work for fault tolerant netware but does for the rest.
199 */
200 if (*(unsigned short *)rawp == 0xFFFF)
201 return htons(ETH_P_802_3);
202
203 /**
204 * Real 802.2 LLC
205 */
206 return htons(ETH_P_802_2);
207 }
208
209 #define TS_SZ 188
210 #define TS_SYNC 0x47
211 #define TS_TEI 0x80
212 #define TS_SC 0xC0
213 #define TS_PUSI 0x40
214 #define TS_AF_A 0x20
215 #define TS_AF_D 0x10
216
217 /* ULE Extension Header handlers. */
218
219 #define ULE_TEST 0
220 #define ULE_BRIDGED 1
221
222 #define ULE_OPTEXTHDR_PADDING 0
223
224 static int ule_test_sndu( struct dvb_net_priv *p )
225 {
226 return -1;
227 }
228
229 static int ule_bridged_sndu( struct dvb_net_priv *p )
230 {
231 struct ethhdr *hdr = (struct ethhdr*) p->ule_next_hdr;
232 if(ntohs(hdr->h_proto) < 1536) {
233 int framelen = p->ule_sndu_len - ((p->ule_next_hdr+sizeof(struct ethhdr)) - p->ule_skb->data);
234 /* A frame Type < 1536 for a bridged frame, introduces a LLC Length field. */
235 if(framelen != ntohs(hdr->h_proto)) {
236 return -1;
237 }
238 }
239 /* Note:
240 * From RFC4326:
241 * "A bridged SNDU is a Mandatory Extension Header of Type 1.
242 * It must be the final (or only) extension header specified in the header chain of a SNDU."
243 * The 'ule_bridged' flag will cause the extension header processing loop to terminate.
244 */
245 p->ule_bridged = 1;
246 return 0;
247 }
248
249 static int ule_exthdr_padding(struct dvb_net_priv *p)
250 {
251 return 0;
252 }
253
254 /** Handle ULE extension headers.
255 * Function is called after a successful CRC32 verification of an ULE SNDU to complete its decoding.
256 * Returns: >= 0: nr. of bytes consumed by next extension header
257 * -1: Mandatory extension header that is not recognized or TEST SNDU; discard.
258 */
259 static int handle_one_ule_extension( struct dvb_net_priv *p )
260 {
261 /* Table of mandatory extension header handlers. The header type is the index. */
262 static int (*ule_mandatory_ext_handlers[255])( struct dvb_net_priv *p ) =
263 { [0] = ule_test_sndu, [1] = ule_bridged_sndu, [2] = NULL, };
264
265 /* Table of optional extension header handlers. The header type is the index. */
266 static int (*ule_optional_ext_handlers[255])( struct dvb_net_priv *p ) =
267 { [0] = ule_exthdr_padding, [1] = NULL, };
268
269 int ext_len = 0;
270 unsigned char hlen = (p->ule_sndu_type & 0x0700) >> 8;
271 unsigned char htype = p->ule_sndu_type & 0x00FF;
272
273 /* Discriminate mandatory and optional extension headers. */
274 if (hlen == 0) {
275 /* Mandatory extension header */
276 if (ule_mandatory_ext_handlers[htype]) {
277 ext_len = ule_mandatory_ext_handlers[htype]( p );
278 if(ext_len >= 0) {
279 p->ule_next_hdr += ext_len;
280 if (!p->ule_bridged) {
281 p->ule_sndu_type = ntohs(*(__be16 *)p->ule_next_hdr);
282 p->ule_next_hdr += 2;
283 } else {
284 p->ule_sndu_type = ntohs(*(__be16 *)(p->ule_next_hdr + ((p->ule_dbit ? 2 : 3) * ETH_ALEN)));
285 /* This assures the extension handling loop will terminate. */
286 }
287 }
288 // else: extension handler failed or SNDU should be discarded
289 } else
290 ext_len = -1; /* SNDU has to be discarded. */
291 } else {
292 /* Optional extension header. Calculate the length. */
293 ext_len = hlen << 1;
294 /* Process the optional extension header according to its type. */
295 if (ule_optional_ext_handlers[htype])
296 (void)ule_optional_ext_handlers[htype]( p );
297 p->ule_next_hdr += ext_len;
298 p->ule_sndu_type = ntohs( *(__be16 *)(p->ule_next_hdr-2) );
299 /*
300 * note: the length of the next header type is included in the
301 * length of THIS optional extension header
302 */
303 }
304
305 return ext_len;
306 }
307
308 static int handle_ule_extensions( struct dvb_net_priv *p )
309 {
310 int total_ext_len = 0, l;
311
312 p->ule_next_hdr = p->ule_skb->data;
313 do {
314 l = handle_one_ule_extension( p );
315 if (l < 0)
316 return l; /* Stop extension header processing and discard SNDU. */
317 total_ext_len += l;
318 #ifdef ULE_DEBUG
319 dprintk("handle_ule_extensions: ule_next_hdr=%p, ule_sndu_type=%i, "
320 "l=%i, total_ext_len=%i\n", p->ule_next_hdr,
321 (int) p->ule_sndu_type, l, total_ext_len);
322 #endif
323
324 } while (p->ule_sndu_type < 1536);
325
326 return total_ext_len;
327 }
328
329
330 /** Prepare for a new ULE SNDU: reset the decoder state. */
331 static inline void reset_ule( struct dvb_net_priv *p )
332 {
333 p->ule_skb = NULL;
334 p->ule_next_hdr = NULL;
335 p->ule_sndu_len = 0;
336 p->ule_sndu_type = 0;
337 p->ule_sndu_type_1 = 0;
338 p->ule_sndu_remain = 0;
339 p->ule_dbit = 0xFF;
340 p->ule_bridged = 0;
341 }
342
343 /**
344 * Decode ULE SNDUs according to draft-ietf-ipdvb-ule-03.txt from a sequence of
345 * TS cells of a single PID.
346 */
347 static void dvb_net_ule( struct net_device *dev, const u8 *buf, size_t buf_len )
348 {
349 struct dvb_net_priv *priv = netdev_priv(dev);
350 unsigned long skipped = 0L;
351 const u8 *ts, *ts_end, *from_where = NULL;
352 u8 ts_remain = 0, how_much = 0, new_ts = 1;
353 struct ethhdr *ethh = NULL;
354
355 #ifdef ULE_DEBUG
356 /* The code inside ULE_DEBUG keeps a history of the last 100 TS cells processed. */
357 static unsigned char ule_hist[100*TS_SZ];
358 static unsigned char *ule_where = ule_hist, ule_dump;
359 #endif
360
361 /* For all TS cells in current buffer.
362 * Appearently, we are called for every single TS cell.
363 */
364 for (ts = buf, ts_end = buf + buf_len; ts < ts_end; /* no default incr. */ ) {
365
366 if (new_ts) {
367 /* We are about to process a new TS cell. */
368
369 #ifdef ULE_DEBUG
370 if (ule_where >= &ule_hist[100*TS_SZ]) ule_where = ule_hist;
371 memcpy( ule_where, ts, TS_SZ );
372 if (ule_dump) {
373 hexdump( ule_where, TS_SZ );
374 ule_dump = 0;
375 }
376 ule_where += TS_SZ;
377 #endif
378
379 /* Check TS error conditions: sync_byte, transport_error_indicator, scrambling_control . */
380 if ((ts[0] != TS_SYNC) || (ts[1] & TS_TEI) || ((ts[3] & TS_SC) != 0)) {
381 printk(KERN_WARNING "%lu: Invalid TS cell: SYNC %#x, TEI %u, SC %#x.\n",
382 priv->ts_count, ts[0], ts[1] & TS_TEI >> 7, ts[3] & 0xC0 >> 6);
383
384 /* Drop partly decoded SNDU, reset state, resync on PUSI. */
385 if (priv->ule_skb) {
386 dev_kfree_skb( priv->ule_skb );
387 /* Prepare for next SNDU. */
388 dev->stats.rx_errors++;
389 dev->stats.rx_frame_errors++;
390 }
391 reset_ule(priv);
392 priv->need_pusi = 1;
393
394 /* Continue with next TS cell. */
395 ts += TS_SZ;
396 priv->ts_count++;
397 continue;
398 }
399
400 ts_remain = 184;
401 from_where = ts + 4;
402 }
403 /* Synchronize on PUSI, if required. */
404 if (priv->need_pusi) {
405 if (ts[1] & TS_PUSI) {
406 /* Find beginning of first ULE SNDU in current TS cell. */
407 /* Synchronize continuity counter. */
408 priv->tscc = ts[3] & 0x0F;
409 /* There is a pointer field here. */
410 if (ts[4] > ts_remain) {
411 printk(KERN_ERR "%lu: Invalid ULE packet "
412 "(pointer field %d)\n", priv->ts_count, ts[4]);
413 ts += TS_SZ;
414 priv->ts_count++;
415 continue;
416 }
417 /* Skip to destination of pointer field. */
418 from_where = &ts[5] + ts[4];
419 ts_remain -= 1 + ts[4];
420 skipped = 0;
421 } else {
422 skipped++;
423 ts += TS_SZ;
424 priv->ts_count++;
425 continue;
426 }
427 }
428
429 if (new_ts) {
430 /* Check continuity counter. */
431 if ((ts[3] & 0x0F) == priv->tscc)
432 priv->tscc = (priv->tscc + 1) & 0x0F;
433 else {
434 /* TS discontinuity handling: */
435 printk(KERN_WARNING "%lu: TS discontinuity: got %#x, "
436 "expected %#x.\n", priv->ts_count, ts[3] & 0x0F, priv->tscc);
437 /* Drop partly decoded SNDU, reset state, resync on PUSI. */
438 if (priv->ule_skb) {
439 dev_kfree_skb( priv->ule_skb );
440 /* Prepare for next SNDU. */
441 // reset_ule(priv); moved to below.
442 dev->stats.rx_errors++;
443 dev->stats.rx_frame_errors++;
444 }
445 reset_ule(priv);
446 /* skip to next PUSI. */
447 priv->need_pusi = 1;
448 continue;
449 }
450 /* If we still have an incomplete payload, but PUSI is
451 * set; some TS cells are missing.
452 * This is only possible here, if we missed exactly 16 TS
453 * cells (continuity counter wrap). */
454 if (ts[1] & TS_PUSI) {
455 if (! priv->need_pusi) {
456 if (!(*from_where < (ts_remain-1)) || *from_where != priv->ule_sndu_remain) {
457 /* Pointer field is invalid. Drop this TS cell and any started ULE SNDU. */
458 printk(KERN_WARNING "%lu: Invalid pointer "
459 "field: %u.\n", priv->ts_count, *from_where);
460
461 /* Drop partly decoded SNDU, reset state, resync on PUSI. */
462 if (priv->ule_skb) {
463 dev_kfree_skb( priv->ule_skb );
464 dev->stats.rx_errors++;
465 dev->stats.rx_frame_errors++;
466 }
467 reset_ule(priv);
468 priv->need_pusi = 1;
469 continue;
470 }
471 /* Skip pointer field (we're processing a
472 * packed payload). */
473 from_where += 1;
474 ts_remain -= 1;
475 } else
476 priv->need_pusi = 0;
477
478 if (priv->ule_sndu_remain > 183) {
479 /* Current SNDU lacks more data than there could be available in the
480 * current TS cell. */
481 dev->stats.rx_errors++;
482 dev->stats.rx_length_errors++;
483 printk(KERN_WARNING "%lu: Expected %d more SNDU bytes, but "
484 "got PUSI (pf %d, ts_remain %d). Flushing incomplete payload.\n",
485 priv->ts_count, priv->ule_sndu_remain, ts[4], ts_remain);
486 dev_kfree_skb(priv->ule_skb);
487 /* Prepare for next SNDU. */
488 reset_ule(priv);
489 /* Resync: go to where pointer field points to: start of next ULE SNDU. */
490 from_where += ts[4];
491 ts_remain -= ts[4];
492 }
493 }
494 }
495
496 /* Check if new payload needs to be started. */
497 if (priv->ule_skb == NULL) {
498 /* Start a new payload with skb.
499 * Find ULE header. It is only guaranteed that the
500 * length field (2 bytes) is contained in the current
501 * TS.
502 * Check ts_remain has to be >= 2 here. */
503 if (ts_remain < 2) {
504 printk(KERN_WARNING "Invalid payload packing: only %d "
505 "bytes left in TS. Resyncing.\n", ts_remain);
506 priv->ule_sndu_len = 0;
507 priv->need_pusi = 1;
508 ts += TS_SZ;
509 continue;
510 }
511
512 if (! priv->ule_sndu_len) {
513 /* Got at least two bytes, thus extrace the SNDU length. */
514 priv->ule_sndu_len = from_where[0] << 8 | from_where[1];
515 if (priv->ule_sndu_len & 0x8000) {
516 /* D-Bit is set: no dest mac present. */
517 priv->ule_sndu_len &= 0x7FFF;
518 priv->ule_dbit = 1;
519 } else
520 priv->ule_dbit = 0;
521
522 if (priv->ule_sndu_len < 5) {
523 printk(KERN_WARNING "%lu: Invalid ULE SNDU length %u. "
524 "Resyncing.\n", priv->ts_count, priv->ule_sndu_len);
525 dev->stats.rx_errors++;
526 dev->stats.rx_length_errors++;
527 priv->ule_sndu_len = 0;
528 priv->need_pusi = 1;
529 new_ts = 1;
530 ts += TS_SZ;
531 priv->ts_count++;
532 continue;
533 }
534 ts_remain -= 2; /* consume the 2 bytes SNDU length. */
535 from_where += 2;
536 }
537
538 /*
539 * State of current TS:
540 * ts_remain (remaining bytes in the current TS cell)
541 * 0 ule_type is not available now, we need the next TS cell
542 * 1 the first byte of the ule_type is present
543 * >=2 full ULE header present, maybe some payload data as well.
544 */
545 switch (ts_remain) {
546 case 1:
547 priv->ule_sndu_type = from_where[0] << 8;
548 priv->ule_sndu_type_1 = 1; /* first byte of ule_type is set. */
549 ts_remain -= 1; from_where += 1;
550 /* Continue w/ next TS. */
551 case 0:
552 new_ts = 1;
553 ts += TS_SZ;
554 priv->ts_count++;
555 continue;
556
557 default: /* complete ULE header is present in current TS. */
558 /* Extract ULE type field. */
559 if (priv->ule_sndu_type_1) {
560 priv->ule_sndu_type |= from_where[0];
561 from_where += 1; /* points to payload start. */
562 ts_remain -= 1;
563 } else {
564 /* Complete type is present in new TS. */
565 priv->ule_sndu_type = from_where[0] << 8 | from_where[1];
566 from_where += 2; /* points to payload start. */
567 ts_remain -= 2;
568 }
569 break;
570 }
571
572 /* Allocate the skb (decoder target buffer) with the correct size, as follows:
573 * prepare for the largest case: bridged SNDU with MAC address (dbit = 0). */
574 priv->ule_skb = dev_alloc_skb( priv->ule_sndu_len + ETH_HLEN + ETH_ALEN );
575 if (priv->ule_skb == NULL) {
576 printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n",
577 dev->name);
578 dev->stats.rx_dropped++;
579 return;
580 }
581
582 /* This includes the CRC32 _and_ dest mac, if !dbit. */
583 priv->ule_sndu_remain = priv->ule_sndu_len;
584 priv->ule_skb->dev = dev;
585 /* Leave space for Ethernet or bridged SNDU header (eth hdr plus one MAC addr). */
586 skb_reserve( priv->ule_skb, ETH_HLEN + ETH_ALEN );
587 }
588
589 /* Copy data into our current skb. */
590 how_much = min(priv->ule_sndu_remain, (int)ts_remain);
591 memcpy(skb_put(priv->ule_skb, how_much), from_where, how_much);
592 priv->ule_sndu_remain -= how_much;
593 ts_remain -= how_much;
594 from_where += how_much;
595
596 /* Check for complete payload. */
597 if (priv->ule_sndu_remain <= 0) {
598 /* Check CRC32, we've got it in our skb already. */
599 __be16 ulen = htons(priv->ule_sndu_len);
600 __be16 utype = htons(priv->ule_sndu_type);
601 const u8 *tail;
602 struct kvec iov[3] = {
603 { &ulen, sizeof ulen },
604 { &utype, sizeof utype },
605 { priv->ule_skb->data, priv->ule_skb->len - 4 }
606 };
607 u32 ule_crc = ~0L, expected_crc;
608 if (priv->ule_dbit) {
609 /* Set D-bit for CRC32 verification,
610 * if it was set originally. */
611 ulen |= htons(0x8000);
612 }
613
614 ule_crc = iov_crc32(ule_crc, iov, 3);
615 tail = skb_tail_pointer(priv->ule_skb);
616 expected_crc = *(tail - 4) << 24 |
617 *(tail - 3) << 16 |
618 *(tail - 2) << 8 |
619 *(tail - 1);
620 if (ule_crc != expected_crc) {
621 printk(KERN_WARNING "%lu: CRC32 check FAILED: %08x / %08x, SNDU len %d type %#x, ts_remain %d, next 2: %x.\n",
622 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);
623
624 #ifdef ULE_DEBUG
625 hexdump( iov[0].iov_base, iov[0].iov_len );
626 hexdump( iov[1].iov_base, iov[1].iov_len );
627 hexdump( iov[2].iov_base, iov[2].iov_len );
628
629 if (ule_where == ule_hist) {
630 hexdump( &ule_hist[98*TS_SZ], TS_SZ );
631 hexdump( &ule_hist[99*TS_SZ], TS_SZ );
632 } else if (ule_where == &ule_hist[TS_SZ]) {
633 hexdump( &ule_hist[99*TS_SZ], TS_SZ );
634 hexdump( ule_hist, TS_SZ );
635 } else {
636 hexdump( ule_where - TS_SZ - TS_SZ, TS_SZ );
637 hexdump( ule_where - TS_SZ, TS_SZ );
638 }
639 ule_dump = 1;
640 #endif
641
642 dev->stats.rx_errors++;
643 dev->stats.rx_crc_errors++;
644 dev_kfree_skb(priv->ule_skb);
645 } else {
646 /* CRC32 verified OK. */
647 u8 dest_addr[ETH_ALEN];
648 static const u8 bc_addr[ETH_ALEN] =
649 { [ 0 ... ETH_ALEN-1] = 0xff };
650
651 /* CRC32 was OK. Remove it from skb. */
652 priv->ule_skb->tail -= 4;
653 priv->ule_skb->len -= 4;
654
655 if (!priv->ule_dbit) {
656 /*
657 * The destination MAC address is the
658 * next data in the skb. It comes
659 * before any extension headers.
660 *
661 * Check if the payload of this SNDU
662 * should be passed up the stack.
663 */
664 register int drop = 0;
665 if (priv->rx_mode != RX_MODE_PROMISC) {
666 if (priv->ule_skb->data[0] & 0x01) {
667 /* multicast or broadcast */
668 if (memcmp(priv->ule_skb->data, bc_addr, ETH_ALEN)) {
669 /* multicast */
670 if (priv->rx_mode == RX_MODE_MULTI) {
671 int i;
672 for(i = 0; i < priv->multi_num && memcmp(priv->ule_skb->data, priv->multi_macs[i], ETH_ALEN); i++)
673 ;
674 if (i == priv->multi_num)
675 drop = 1;
676 } else if (priv->rx_mode != RX_MODE_ALL_MULTI)
677 drop = 1; /* no broadcast; */
678 /* else: all multicast mode: accept all multicast packets */
679 }
680 /* else: broadcast */
681 }
682 else if (memcmp(priv->ule_skb->data, dev->dev_addr, ETH_ALEN))
683 drop = 1;
684 /* else: destination address matches the MAC address of our receiver device */
685 }
686 /* else: promiscuous mode; pass everything up the stack */
687
688 if (drop) {
689 #ifdef ULE_DEBUG
690 dprintk("Dropping SNDU: MAC destination address does not match: dest addr: "MAC_ADDR_PRINTFMT", dev addr: "MAC_ADDR_PRINTFMT"\n",
691 MAX_ADDR_PRINTFMT_ARGS(priv->ule_skb->data), MAX_ADDR_PRINTFMT_ARGS(dev->dev_addr));
692 #endif
693 dev_kfree_skb(priv->ule_skb);
694 goto sndu_done;
695 }
696 else
697 {
698 skb_copy_from_linear_data(priv->ule_skb,
699 dest_addr,
700 ETH_ALEN);
701 skb_pull(priv->ule_skb, ETH_ALEN);
702 }
703 }
704
705 /* Handle ULE Extension Headers. */
706 if (priv->ule_sndu_type < 1536) {
707 /* There is an extension header. Handle it accordingly. */
708 int l = handle_ule_extensions(priv);
709 if (l < 0) {
710 /* Mandatory extension header unknown or TEST SNDU. Drop it. */
711 // printk( KERN_WARNING "Dropping SNDU, extension headers.\n" );
712 dev_kfree_skb(priv->ule_skb);
713 goto sndu_done;
714 }
715 skb_pull(priv->ule_skb, l);
716 }
717
718 /*
719 * Construct/assure correct ethernet header.
720 * Note: in bridged mode (priv->ule_bridged !=
721 * 0) we already have the (original) ethernet
722 * header at the start of the payload (after
723 * optional dest. address and any extension
724 * headers).
725 */
726
727 if (!priv->ule_bridged) {
728 skb_push(priv->ule_skb, ETH_HLEN);
729 ethh = (struct ethhdr *)priv->ule_skb->data;
730 if (!priv->ule_dbit) {
731 /* dest_addr buffer is only valid if priv->ule_dbit == 0 */
732 memcpy(ethh->h_dest, dest_addr, ETH_ALEN);
733 memset(ethh->h_source, 0, ETH_ALEN);
734 }
735 else /* zeroize source and dest */
736 memset( ethh, 0, ETH_ALEN*2 );
737
738 ethh->h_proto = htons(priv->ule_sndu_type);
739 }
740 /* else: skb is in correct state; nothing to do. */
741 priv->ule_bridged = 0;
742
743 /* Stuff into kernel's protocol stack. */
744 priv->ule_skb->protocol = dvb_net_eth_type_trans(priv->ule_skb, dev);
745 /* If D-bit is set (i.e. destination MAC address not present),
746 * receive the packet anyhow. */
747 /* if (priv->ule_dbit && skb->pkt_type == PACKET_OTHERHOST)
748 priv->ule_skb->pkt_type = PACKET_HOST; */
749 dev->stats.rx_packets++;
750 dev->stats.rx_bytes += priv->ule_skb->len;
751 netif_rx(priv->ule_skb);
752 }
753 sndu_done:
754 /* Prepare for next SNDU. */
755 reset_ule(priv);
756 }
757
758 /* More data in current TS (look at the bytes following the CRC32)? */
759 if (ts_remain >= 2 && *((unsigned short *)from_where) != 0xFFFF) {
760 /* Next ULE SNDU starts right there. */
761 new_ts = 0;
762 priv->ule_skb = NULL;
763 priv->ule_sndu_type_1 = 0;
764 priv->ule_sndu_len = 0;
765 // printk(KERN_WARNING "More data in current TS: [%#x %#x %#x %#x]\n",
766 // *(from_where + 0), *(from_where + 1),
767 // *(from_where + 2), *(from_where + 3));
768 // printk(KERN_WARNING "ts @ %p, stopped @ %p:\n", ts, from_where + 0);
769 // hexdump(ts, 188);
770 } else {
771 new_ts = 1;
772 ts += TS_SZ;
773 priv->ts_count++;
774 if (priv->ule_skb == NULL) {
775 priv->need_pusi = 1;
776 priv->ule_sndu_type_1 = 0;
777 priv->ule_sndu_len = 0;
778 }
779 }
780 } /* for all available TS cells */
781 }
782
783 static int dvb_net_ts_callback(const u8 *buffer1, size_t buffer1_len,
784 const u8 *buffer2, size_t buffer2_len,
785 struct dmx_ts_feed *feed, enum dmx_success success)
786 {
787 struct net_device *dev = feed->priv;
788
789 if (buffer2)
790 printk(KERN_WARNING "buffer2 not NULL: %p.\n", buffer2);
791 if (buffer1_len > 32768)
792 printk(KERN_WARNING "length > 32k: %zu.\n", buffer1_len);
793 /* printk("TS callback: %u bytes, %u TS cells @ %p.\n",
794 buffer1_len, buffer1_len / TS_SZ, buffer1); */
795 dvb_net_ule(dev, buffer1, buffer1_len);
796 return 0;
797 }
798
799
800 static void dvb_net_sec(struct net_device *dev,
801 const u8 *pkt, int pkt_len)
802 {
803 u8 *eth;
804 struct sk_buff *skb;
805 struct net_device_stats *stats = &dev->stats;
806 int snap = 0;
807
808 /* note: pkt_len includes a 32bit checksum */
809 if (pkt_len < 16) {
810 printk("%s: IP/MPE packet length = %d too small.\n",
811 dev->name, pkt_len);
812 stats->rx_errors++;
813 stats->rx_length_errors++;
814 return;
815 }
816 /* it seems some ISPs manage to screw up here, so we have to
817 * relax the error checks... */
818 #if 0
819 if ((pkt[5] & 0xfd) != 0xc1) {
820 /* drop scrambled or broken packets */
821 #else
822 if ((pkt[5] & 0x3c) != 0x00) {
823 /* drop scrambled */
824 #endif
825 stats->rx_errors++;
826 stats->rx_crc_errors++;
827 return;
828 }
829 if (pkt[5] & 0x02) {
830 /* handle LLC/SNAP, see rfc-1042 */
831 if (pkt_len < 24 || memcmp(&pkt[12], "\xaa\xaa\x03\0\0\0", 6)) {
832 stats->rx_dropped++;
833 return;
834 }
835 snap = 8;
836 }
837 if (pkt[7]) {
838 /* FIXME: assemble datagram from multiple sections */
839 stats->rx_errors++;
840 stats->rx_frame_errors++;
841 return;
842 }
843
844 /* we have 14 byte ethernet header (ip header follows);
845 * 12 byte MPE header; 4 byte checksum; + 2 byte alignment, 8 byte LLC/SNAP
846 */
847 if (!(skb = dev_alloc_skb(pkt_len - 4 - 12 + 14 + 2 - snap))) {
848 //printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n", dev->name);
849 stats->rx_dropped++;
850 return;
851 }
852 skb_reserve(skb, 2); /* longword align L3 header */
853 skb->dev = dev;
854
855 /* copy L3 payload */
856 eth = (u8 *) skb_put(skb, pkt_len - 12 - 4 + 14 - snap);
857 memcpy(eth + 14, pkt + 12 + snap, pkt_len - 12 - 4 - snap);
858
859 /* create ethernet header: */
860 eth[0]=pkt[0x0b];
861 eth[1]=pkt[0x0a];
862 eth[2]=pkt[0x09];
863 eth[3]=pkt[0x08];
864 eth[4]=pkt[0x04];
865 eth[5]=pkt[0x03];
866
867 eth[6]=eth[7]=eth[8]=eth[9]=eth[10]=eth[11]=0;
868
869 if (snap) {
870 eth[12] = pkt[18];
871 eth[13] = pkt[19];
872 } else {
873 /* protocol numbers are from rfc-1700 or
874 * http://www.iana.org/assignments/ethernet-numbers
875 */
876 if (pkt[12] >> 4 == 6) { /* version field from IP header */
877 eth[12] = 0x86; /* IPv6 */
878 eth[13] = 0xdd;
879 } else {
880 eth[12] = 0x08; /* IPv4 */
881 eth[13] = 0x00;
882 }
883 }
884
885 skb->protocol = dvb_net_eth_type_trans(skb, dev);
886
887 stats->rx_packets++;
888 stats->rx_bytes+=skb->len;
889 netif_rx(skb);
890 }
891
892 static int dvb_net_sec_callback(const u8 *buffer1, size_t buffer1_len,
893 const u8 *buffer2, size_t buffer2_len,
894 struct dmx_section_filter *filter,
895 enum dmx_success success)
896 {
897 struct net_device *dev = filter->priv;
898
899 /**
900 * we rely on the DVB API definition where exactly one complete
901 * section is delivered in buffer1
902 */
903 dvb_net_sec (dev, buffer1, buffer1_len);
904 return 0;
905 }
906
907 static int dvb_net_tx(struct sk_buff *skb, struct net_device *dev)
908 {
909 dev_kfree_skb(skb);
910 return NETDEV_TX_OK;
911 }
912
913 static u8 mask_normal[6]={0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
914 static u8 mask_allmulti[6]={0xff, 0xff, 0xff, 0x00, 0x00, 0x00};
915 static u8 mac_allmulti[6]={0x01, 0x00, 0x5e, 0x00, 0x00, 0x00};
916 static u8 mask_promisc[6]={0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
917
918 static int dvb_net_filter_sec_set(struct net_device *dev,
919 struct dmx_section_filter **secfilter,
920 u8 *mac, u8 *mac_mask)
921 {
922 struct dvb_net_priv *priv = netdev_priv(dev);
923 int ret;
924
925 *secfilter=NULL;
926 ret = priv->secfeed->allocate_filter(priv->secfeed, secfilter);
927 if (ret<0) {
928 printk("%s: could not get filter\n", dev->name);
929 return ret;
930 }
931
932 (*secfilter)->priv=(void *) dev;
933
934 memset((*secfilter)->filter_value, 0x00, DMX_MAX_FILTER_SIZE);
935 memset((*secfilter)->filter_mask, 0x00, DMX_MAX_FILTER_SIZE);
936 memset((*secfilter)->filter_mode, 0xff, DMX_MAX_FILTER_SIZE);
937
938 (*secfilter)->filter_value[0]=0x3e;
939 (*secfilter)->filter_value[3]=mac[5];
940 (*secfilter)->filter_value[4]=mac[4];
941 (*secfilter)->filter_value[8]=mac[3];
942 (*secfilter)->filter_value[9]=mac[2];
943 (*secfilter)->filter_value[10]=mac[1];
944 (*secfilter)->filter_value[11]=mac[0];
945
946 (*secfilter)->filter_mask[0] = 0xff;
947 (*secfilter)->filter_mask[3] = mac_mask[5];
948 (*secfilter)->filter_mask[4] = mac_mask[4];
949 (*secfilter)->filter_mask[8] = mac_mask[3];
950 (*secfilter)->filter_mask[9] = mac_mask[2];
951 (*secfilter)->filter_mask[10] = mac_mask[1];
952 (*secfilter)->filter_mask[11]=mac_mask[0];
953
954 dprintk("%s: filter mac=%pM\n", dev->name, mac);
955 dprintk("%s: filter mask=%pM\n", dev->name, mac_mask);
956
957 return 0;
958 }
959
960 static int dvb_net_feed_start(struct net_device *dev)
961 {
962 int ret = 0, i;
963 struct dvb_net_priv *priv = netdev_priv(dev);
964 struct dmx_demux *demux = priv->demux;
965 unsigned char *mac = (unsigned char *) dev->dev_addr;
966
967 dprintk("%s: rx_mode %i\n", __func__, priv->rx_mode);
968 mutex_lock(&priv->mutex);
969 if (priv->tsfeed || priv->secfeed || priv->secfilter || priv->multi_secfilter[0])
970 printk("%s: BUG %d\n", __func__, __LINE__);
971
972 priv->secfeed=NULL;
973 priv->secfilter=NULL;
974 priv->tsfeed = NULL;
975
976 if (priv->feedtype == DVB_NET_FEEDTYPE_MPE) {
977 dprintk("%s: alloc secfeed\n", __func__);
978 ret=demux->allocate_section_feed(demux, &priv->secfeed,
979 dvb_net_sec_callback);
980 if (ret<0) {
981 printk("%s: could not allocate section feed\n", dev->name);
982 goto error;
983 }
984
985 ret = priv->secfeed->set(priv->secfeed, priv->pid, 32768, 1);
986
987 if (ret<0) {
988 printk("%s: could not set section feed\n", dev->name);
989 priv->demux->release_section_feed(priv->demux, priv->secfeed);
990 priv->secfeed=NULL;
991 goto error;
992 }
993
994 if (priv->rx_mode != RX_MODE_PROMISC) {
995 dprintk("%s: set secfilter\n", __func__);
996 dvb_net_filter_sec_set(dev, &priv->secfilter, mac, mask_normal);
997 }
998
999 switch (priv->rx_mode) {
1000 case RX_MODE_MULTI:
1001 for (i = 0; i < priv->multi_num; i++) {
1002 dprintk("%s: set multi_secfilter[%d]\n", __func__, i);
1003 dvb_net_filter_sec_set(dev, &priv->multi_secfilter[i],
1004 priv->multi_macs[i], mask_normal);
1005 }
1006 break;
1007 case RX_MODE_ALL_MULTI:
1008 priv->multi_num=1;
1009 dprintk("%s: set multi_secfilter[0]\n", __func__);
1010 dvb_net_filter_sec_set(dev, &priv->multi_secfilter[0],
1011 mac_allmulti, mask_allmulti);
1012 break;
1013 case RX_MODE_PROMISC:
1014 priv->multi_num=0;
1015 dprintk("%s: set secfilter\n", __func__);
1016 dvb_net_filter_sec_set(dev, &priv->secfilter, mac, mask_promisc);
1017 break;
1018 }
1019
1020 dprintk("%s: start filtering\n", __func__);
1021 priv->secfeed->start_filtering(priv->secfeed);
1022 } else if (priv->feedtype == DVB_NET_FEEDTYPE_ULE) {
1023 struct timespec timeout = { 0, 10000000 }; // 10 msec
1024
1025 /* we have payloads encapsulated in TS */
1026 dprintk("%s: alloc tsfeed\n", __func__);
1027 ret = demux->allocate_ts_feed(demux, &priv->tsfeed, dvb_net_ts_callback);
1028 if (ret < 0) {
1029 printk("%s: could not allocate ts feed\n", dev->name);
1030 goto error;
1031 }
1032
1033 /* Set netdevice pointer for ts decaps callback. */
1034 priv->tsfeed->priv = (void *)dev;
1035 ret = priv->tsfeed->set(priv->tsfeed,
1036 priv->pid, /* pid */
1037 TS_PACKET, /* type */
1038 DMX_TS_PES_OTHER, /* pes type */
1039 32768, /* circular buffer size */
1040 timeout /* timeout */
1041 );
1042
1043 if (ret < 0) {
1044 printk("%s: could not set ts feed\n", dev->name);
1045 priv->demux->release_ts_feed(priv->demux, priv->tsfeed);
1046 priv->tsfeed = NULL;
1047 goto error;
1048 }
1049
1050 dprintk("%s: start filtering\n", __func__);
1051 priv->tsfeed->start_filtering(priv->tsfeed);
1052 } else
1053 ret = -EINVAL;
1054
1055 error:
1056 mutex_unlock(&priv->mutex);
1057 return ret;
1058 }
1059
1060 static int dvb_net_feed_stop(struct net_device *dev)
1061 {
1062 struct dvb_net_priv *priv = netdev_priv(dev);
1063 int i, ret = 0;
1064
1065 dprintk("%s\n", __func__);
1066 mutex_lock(&priv->mutex);
1067 if (priv->feedtype == DVB_NET_FEEDTYPE_MPE) {
1068 if (priv->secfeed) {
1069 if (priv->secfeed->is_filtering) {
1070 dprintk("%s: stop secfeed\n", __func__);
1071 priv->secfeed->stop_filtering(priv->secfeed);
1072 }
1073
1074 if (priv->secfilter) {
1075 dprintk("%s: release secfilter\n", __func__);
1076 priv->secfeed->release_filter(priv->secfeed,
1077 priv->secfilter);
1078 priv->secfilter=NULL;
1079 }
1080
1081 for (i=0; i<priv->multi_num; i++) {
1082 if (priv->multi_secfilter[i]) {
1083 dprintk("%s: release multi_filter[%d]\n",
1084 __func__, i);
1085 priv->secfeed->release_filter(priv->secfeed,
1086 priv->multi_secfilter[i]);
1087 priv->multi_secfilter[i] = NULL;
1088 }
1089 }
1090
1091 priv->demux->release_section_feed(priv->demux, priv->secfeed);
1092 priv->secfeed = NULL;
1093 } else
1094 printk("%s: no feed to stop\n", dev->name);
1095 } else if (priv->feedtype == DVB_NET_FEEDTYPE_ULE) {
1096 if (priv->tsfeed) {
1097 if (priv->tsfeed->is_filtering) {
1098 dprintk("%s: stop tsfeed\n", __func__);
1099 priv->tsfeed->stop_filtering(priv->tsfeed);
1100 }
1101 priv->demux->release_ts_feed(priv->demux, priv->tsfeed);
1102 priv->tsfeed = NULL;
1103 }
1104 else
1105 printk("%s: no ts feed to stop\n", dev->name);
1106 } else
1107 ret = -EINVAL;
1108 mutex_unlock(&priv->mutex);
1109 return ret;
1110 }
1111
1112
1113 static int dvb_set_mc_filter (struct net_device *dev, struct dev_mc_list *mc)
1114 {
1115 struct dvb_net_priv *priv = netdev_priv(dev);
1116
1117 if (priv->multi_num == DVB_NET_MULTICAST_MAX)
1118 return -ENOMEM;
1119
1120 memcpy(priv->multi_macs[priv->multi_num], mc->dmi_addr, 6);
1121
1122 priv->multi_num++;
1123 return 0;
1124 }
1125
1126
1127 static void wq_set_multicast_list (struct work_struct *work)
1128 {
1129 struct dvb_net_priv *priv =
1130 container_of(work, struct dvb_net_priv, set_multicast_list_wq);
1131 struct net_device *dev = priv->net;
1132
1133 dvb_net_feed_stop(dev);
1134 priv->rx_mode = RX_MODE_UNI;
1135 netif_addr_lock_bh(dev);
1136
1137 if (dev->flags & IFF_PROMISC) {
1138 dprintk("%s: promiscuous mode\n", dev->name);
1139 priv->rx_mode = RX_MODE_PROMISC;
1140 } else if ((dev->flags & IFF_ALLMULTI)) {
1141 dprintk("%s: allmulti mode\n", dev->name);
1142 priv->rx_mode = RX_MODE_ALL_MULTI;
1143 } else if (!netdev_mc_empty(dev)) {
1144 int mci;
1145 struct dev_mc_list *mc;
1146
1147 dprintk("%s: set_mc_list, %d entries\n",
1148 dev->name, netdev_mc_count(dev));
1149
1150 priv->rx_mode = RX_MODE_MULTI;
1151 priv->multi_num = 0;
1152
1153 for (mci = 0, mc=dev->mc_list;
1154 mci < netdev_mc_count(dev);
1155 mc = mc->next, mci++) {
1156 dvb_set_mc_filter(dev, mc);
1157 }
1158 }
1159
1160 netif_addr_unlock_bh(dev);
1161 dvb_net_feed_start(dev);
1162 }
1163
1164
1165 static void dvb_net_set_multicast_list (struct net_device *dev)
1166 {
1167 struct dvb_net_priv *priv = netdev_priv(dev);
1168 schedule_work(&priv->set_multicast_list_wq);
1169 }
1170
1171
1172 static void wq_restart_net_feed (struct work_struct *work)
1173 {
1174 struct dvb_net_priv *priv =
1175 container_of(work, struct dvb_net_priv, restart_net_feed_wq);
1176 struct net_device *dev = priv->net;
1177
1178 if (netif_running(dev)) {
1179 dvb_net_feed_stop(dev);
1180 dvb_net_feed_start(dev);
1181 }
1182 }
1183
1184
1185 static int dvb_net_set_mac (struct net_device *dev, void *p)
1186 {
1187 struct dvb_net_priv *priv = netdev_priv(dev);
1188 struct sockaddr *addr=p;
1189
1190 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1191
1192 if (netif_running(dev))
1193 schedule_work(&priv->restart_net_feed_wq);
1194
1195 return 0;
1196 }
1197
1198
1199 static int dvb_net_open(struct net_device *dev)
1200 {
1201 struct dvb_net_priv *priv = netdev_priv(dev);
1202
1203 priv->in_use++;
1204 dvb_net_feed_start(dev);
1205 return 0;
1206 }
1207
1208
1209 static int dvb_net_stop(struct net_device *dev)
1210 {
1211 struct dvb_net_priv *priv = netdev_priv(dev);
1212
1213 priv->in_use--;
1214 return dvb_net_feed_stop(dev);
1215 }
1216
1217 static const struct header_ops dvb_header_ops = {
1218 .create = eth_header,
1219 .parse = eth_header_parse,
1220 .rebuild = eth_rebuild_header,
1221 };
1222
1223
1224 static const struct net_device_ops dvb_netdev_ops = {
1225 .ndo_open = dvb_net_open,
1226 .ndo_stop = dvb_net_stop,
1227 .ndo_start_xmit = dvb_net_tx,
1228 .ndo_set_multicast_list = dvb_net_set_multicast_list,
1229 .ndo_set_mac_address = dvb_net_set_mac,
1230 .ndo_change_mtu = eth_change_mtu,
1231 .ndo_validate_addr = eth_validate_addr,
1232 };
1233
1234 static void dvb_net_setup(struct net_device *dev)
1235 {
1236 ether_setup(dev);
1237
1238 dev->header_ops = &dvb_header_ops;
1239 dev->netdev_ops = &dvb_netdev_ops;
1240 dev->mtu = 4096;
1241
1242 dev->flags |= IFF_NOARP;
1243 }
1244
1245 static int get_if(struct dvb_net *dvbnet)
1246 {
1247 int i;
1248
1249 for (i=0; i<DVB_NET_DEVICES_MAX; i++)
1250 if (!dvbnet->state[i])
1251 break;
1252
1253 if (i == DVB_NET_DEVICES_MAX)
1254 return -1;
1255
1256 dvbnet->state[i]=1;
1257 return i;
1258 }
1259
1260 static int dvb_net_add_if(struct dvb_net *dvbnet, u16 pid, u8 feedtype)
1261 {
1262 struct net_device *net;
1263 struct dvb_net_priv *priv;
1264 int result;
1265 int if_num;
1266
1267 if (feedtype != DVB_NET_FEEDTYPE_MPE && feedtype != DVB_NET_FEEDTYPE_ULE)
1268 return -EINVAL;
1269 if ((if_num = get_if(dvbnet)) < 0)
1270 return -EINVAL;
1271
1272 net = alloc_netdev(sizeof(struct dvb_net_priv), "dvb", dvb_net_setup);
1273 if (!net)
1274 return -ENOMEM;
1275
1276 if (dvbnet->dvbdev->id)
1277 snprintf(net->name, IFNAMSIZ, "dvb%d%u%d",
1278 dvbnet->dvbdev->adapter->num, dvbnet->dvbdev->id, if_num);
1279 else
1280 /* compatibility fix to keep dvb0_0 format */
1281 snprintf(net->name, IFNAMSIZ, "dvb%d_%d",
1282 dvbnet->dvbdev->adapter->num, if_num);
1283
1284 net->addr_len = 6;
1285 memcpy(net->dev_addr, dvbnet->dvbdev->adapter->proposed_mac, 6);
1286
1287 dvbnet->device[if_num] = net;
1288
1289 priv = netdev_priv(net);
1290 priv->net = net;
1291 priv->demux = dvbnet->demux;
1292 priv->pid = pid;
1293 priv->rx_mode = RX_MODE_UNI;
1294 priv->need_pusi = 1;
1295 priv->tscc = 0;
1296 priv->feedtype = feedtype;
1297 reset_ule(priv);
1298
1299 INIT_WORK(&priv->set_multicast_list_wq, wq_set_multicast_list);
1300 INIT_WORK(&priv->restart_net_feed_wq, wq_restart_net_feed);
1301 mutex_init(&priv->mutex);
1302
1303 net->base_addr = pid;
1304
1305 if ((result = register_netdev(net)) < 0) {
1306 dvbnet->device[if_num] = NULL;
1307 free_netdev(net);
1308 return result;
1309 }
1310 printk("dvb_net: created network interface %s\n", net->name);
1311
1312 return if_num;
1313 }
1314
1315 static int dvb_net_remove_if(struct dvb_net *dvbnet, unsigned long num)
1316 {
1317 struct net_device *net = dvbnet->device[num];
1318 struct dvb_net_priv *priv;
1319
1320 if (!dvbnet->state[num])
1321 return -EINVAL;
1322 priv = netdev_priv(net);
1323 if (priv->in_use)
1324 return -EBUSY;
1325
1326 dvb_net_stop(net);
1327 flush_scheduled_work();
1328 printk("dvb_net: removed network interface %s\n", net->name);
1329 unregister_netdev(net);
1330 dvbnet->state[num]=0;
1331 dvbnet->device[num] = NULL;
1332 free_netdev(net);
1333
1334 return 0;
1335 }
1336
1337 static int dvb_net_do_ioctl(struct file *file,
1338 unsigned int cmd, void *parg)
1339 {
1340 struct dvb_device *dvbdev = file->private_data;
1341 struct dvb_net *dvbnet = dvbdev->priv;
1342
1343 if (((file->f_flags&O_ACCMODE)==O_RDONLY))
1344 return -EPERM;
1345
1346 switch (cmd) {
1347 case NET_ADD_IF:
1348 {
1349 struct dvb_net_if *dvbnetif = parg;
1350 int result;
1351
1352 if (!capable(CAP_SYS_ADMIN))
1353 return -EPERM;
1354
1355 if (!try_module_get(dvbdev->adapter->module))
1356 return -EPERM;
1357
1358 result=dvb_net_add_if(dvbnet, dvbnetif->pid, dvbnetif->feedtype);
1359 if (result<0) {
1360 module_put(dvbdev->adapter->module);
1361 return result;
1362 }
1363 dvbnetif->if_num=result;
1364 break;
1365 }
1366 case NET_GET_IF:
1367 {
1368 struct net_device *netdev;
1369 struct dvb_net_priv *priv_data;
1370 struct dvb_net_if *dvbnetif = parg;
1371
1372 if (dvbnetif->if_num >= DVB_NET_DEVICES_MAX ||
1373 !dvbnet->state[dvbnetif->if_num])
1374 return -EINVAL;
1375
1376 netdev = dvbnet->device[dvbnetif->if_num];
1377
1378 priv_data = netdev_priv(netdev);
1379 dvbnetif->pid=priv_data->pid;
1380 dvbnetif->feedtype=priv_data->feedtype;
1381 break;
1382 }
1383 case NET_REMOVE_IF:
1384 {
1385 int ret;
1386
1387 if (!capable(CAP_SYS_ADMIN))
1388 return -EPERM;
1389 if ((unsigned long) parg >= DVB_NET_DEVICES_MAX)
1390 return -EINVAL;
1391 ret = dvb_net_remove_if(dvbnet, (unsigned long) parg);
1392 if (!ret)
1393 module_put(dvbdev->adapter->module);
1394 return ret;
1395 }
1396
1397 /* binary compatibility cruft */
1398 case __NET_ADD_IF_OLD:
1399 {
1400 struct __dvb_net_if_old *dvbnetif = parg;
1401 int result;
1402
1403 if (!capable(CAP_SYS_ADMIN))
1404 return -EPERM;
1405
1406 if (!try_module_get(dvbdev->adapter->module))
1407 return -EPERM;
1408
1409 result=dvb_net_add_if(dvbnet, dvbnetif->pid, DVB_NET_FEEDTYPE_MPE);
1410 if (result<0) {
1411 module_put(dvbdev->adapter->module);
1412 return result;
1413 }
1414 dvbnetif->if_num=result;
1415 break;
1416 }
1417 case __NET_GET_IF_OLD:
1418 {
1419 struct net_device *netdev;
1420 struct dvb_net_priv *priv_data;
1421 struct __dvb_net_if_old *dvbnetif = parg;
1422
1423 if (dvbnetif->if_num >= DVB_NET_DEVICES_MAX ||
1424 !dvbnet->state[dvbnetif->if_num])
1425 return -EINVAL;
1426
1427 netdev = dvbnet->device[dvbnetif->if_num];
1428
1429 priv_data = netdev_priv(netdev);
1430 dvbnetif->pid=priv_data->pid;
1431 break;
1432 }
1433 default:
1434 return -ENOTTY;
1435 }
1436 return 0;
1437 }
1438
1439 static long dvb_net_ioctl(struct file *file,
1440 unsigned int cmd, unsigned long arg)
1441 {
1442 int ret;
1443
1444 lock_kernel();
1445 ret = dvb_usercopy(file, cmd, arg, dvb_net_do_ioctl);
1446 unlock_kernel();
1447
1448 return ret;
1449 }
1450
1451 static int dvb_net_close(struct inode *inode, struct file *file)
1452 {
1453 struct dvb_device *dvbdev = file->private_data;
1454 struct dvb_net *dvbnet = dvbdev->priv;
1455
1456 dvb_generic_release(inode, file);
1457
1458 if(dvbdev->users == 1 && dvbnet->exit == 1) {
1459 fops_put(file->f_op);
1460 file->f_op = NULL;
1461 wake_up(&dvbdev->wait_queue);
1462 }
1463 return 0;
1464 }
1465
1466
1467 static const struct file_operations dvb_net_fops = {
1468 .owner = THIS_MODULE,
1469 .unlocked_ioctl = dvb_net_ioctl,
1470 .open = dvb_generic_open,
1471 .release = dvb_net_close,
1472 };
1473
1474 static struct dvb_device dvbdev_net = {
1475 .priv = NULL,
1476 .users = 1,
1477 .writers = 1,
1478 .fops = &dvb_net_fops,
1479 };
1480
1481
1482 void dvb_net_release (struct dvb_net *dvbnet)
1483 {
1484 int i;
1485
1486 dvbnet->exit = 1;
1487 if (dvbnet->dvbdev->users < 1)
1488 wait_event(dvbnet->dvbdev->wait_queue,
1489 dvbnet->dvbdev->users==1);
1490
1491 dvb_unregister_device(dvbnet->dvbdev);
1492
1493 for (i=0; i<DVB_NET_DEVICES_MAX; i++) {
1494 if (!dvbnet->state[i])
1495 continue;
1496 dvb_net_remove_if(dvbnet, i);
1497 }
1498 }
1499 EXPORT_SYMBOL(dvb_net_release);
1500
1501
1502 int dvb_net_init (struct dvb_adapter *adap, struct dvb_net *dvbnet,
1503 struct dmx_demux *dmx)
1504 {
1505 int i;
1506
1507 dvbnet->demux = dmx;
1508
1509 for (i=0; i<DVB_NET_DEVICES_MAX; i++)
1510 dvbnet->state[i] = 0;
1511
1512 dvb_register_device (adap, &dvbnet->dvbdev, &dvbdev_net,
1513 dvbnet, DVB_DEVICE_NET);
1514
1515 return 0;
1516 }
1517 EXPORT_SYMBOL(dvb_net_init);
kernel source for telekom puls (alcatel/mediatek)