?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
Linux 2.6.22-rc3
[linux-2.6/next.git] / drivers / media / dvb / dvb-core / dvb_net.c
blob4ebf33a5ffa2b1c5bab38c1fafca0e0e83c06c9a
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 u8 *ts, *ts_end, *from_where = NULL, ts_remain = 0, how_much = 0, new_ts = 1;
351 struct ethhdr *ethh = NULL;
352
353 #ifdef ULE_DEBUG
354 /* The code inside ULE_DEBUG keeps a history of the last 100 TS cells processed. */
355 static unsigned char ule_hist[100*TS_SZ];
356 static unsigned char *ule_where = ule_hist, ule_dump = 0;
357 #endif
358
359 if (dev == NULL) {
360 printk( KERN_ERR "NO netdev struct!\n" );
361 return;
362 }
363
364 /* For all TS cells in current buffer.
365 * Appearently, we are called for every single TS cell.
366 */
367 for (ts = (char *)buf, ts_end = (char *)buf + buf_len; ts < ts_end; /* no default incr. */ ) {
368
369 if (new_ts) {
370 /* We are about to process a new TS cell. */
371
372 #ifdef ULE_DEBUG
373 if (ule_where >= &ule_hist[100*TS_SZ]) ule_where = ule_hist;
374 memcpy( ule_where, ts, TS_SZ );
375 if (ule_dump) {
376 hexdump( ule_where, TS_SZ );
377 ule_dump = 0;
378 }
379 ule_where += TS_SZ;
380 #endif
381
382 /* Check TS error conditions: sync_byte, transport_error_indicator, scrambling_control . */
383 if ((ts[0] != TS_SYNC) || (ts[1] & TS_TEI) || ((ts[3] & TS_SC) != 0)) {
384 printk(KERN_WARNING "%lu: Invalid TS cell: SYNC %#x, TEI %u, SC %#x.\n",
385 priv->ts_count, ts[0], ts[1] & TS_TEI >> 7, ts[3] & 0xC0 >> 6);
386
387 /* Drop partly decoded SNDU, reset state, resync on PUSI. */
388 if (priv->ule_skb) {
389 dev_kfree_skb( priv->ule_skb );
390 /* Prepare for next SNDU. */
391 priv->stats.rx_errors++;
392 priv->stats.rx_frame_errors++;
393 }
394 reset_ule(priv);
395 priv->need_pusi = 1;
396
397 /* Continue with next TS cell. */
398 ts += TS_SZ;
399 priv->ts_count++;
400 continue;
401 }
402
403 ts_remain = 184;
404 from_where = ts + 4;
405 }
406 /* Synchronize on PUSI, if required. */
407 if (priv->need_pusi) {
408 if (ts[1] & TS_PUSI) {
409 /* Find beginning of first ULE SNDU in current TS cell. */
410 /* Synchronize continuity counter. */
411 priv->tscc = ts[3] & 0x0F;
412 /* There is a pointer field here. */
413 if (ts[4] > ts_remain) {
414 printk(KERN_ERR "%lu: Invalid ULE packet "
415 "(pointer field %d)\n", priv->ts_count, ts[4]);
416 ts += TS_SZ;
417 priv->ts_count++;
418 continue;
419 }
420 /* Skip to destination of pointer field. */
421 from_where = &ts[5] + ts[4];
422 ts_remain -= 1 + ts[4];
423 skipped = 0;
424 } else {
425 skipped++;
426 ts += TS_SZ;
427 priv->ts_count++;
428 continue;
429 }
430 }
431
432 if (new_ts) {
433 /* Check continuity counter. */
434 if ((ts[3] & 0x0F) == priv->tscc)
435 priv->tscc = (priv->tscc + 1) & 0x0F;
436 else {
437 /* TS discontinuity handling: */
438 printk(KERN_WARNING "%lu: TS discontinuity: got %#x, "
439 "expected %#x.\n", priv->ts_count, ts[3] & 0x0F, priv->tscc);
440 /* Drop partly decoded SNDU, reset state, resync on PUSI. */
441 if (priv->ule_skb) {
442 dev_kfree_skb( priv->ule_skb );
443 /* Prepare for next SNDU. */
444 // reset_ule(priv); moved to below.
445 priv->stats.rx_errors++;
446 priv->stats.rx_frame_errors++;
447 }
448 reset_ule(priv);
449 /* skip to next PUSI. */
450 priv->need_pusi = 1;
451 continue;
452 }
453 /* If we still have an incomplete payload, but PUSI is
454 * set; some TS cells are missing.
455 * This is only possible here, if we missed exactly 16 TS
456 * cells (continuity counter wrap). */
457 if (ts[1] & TS_PUSI) {
458 if (! priv->need_pusi) {
459 if (!(*from_where < (ts_remain-1)) || *from_where != priv->ule_sndu_remain) {
460 /* Pointer field is invalid. Drop this TS cell and any started ULE SNDU. */
461 printk(KERN_WARNING "%lu: Invalid pointer "
462 "field: %u.\n", priv->ts_count, *from_where);
463
464 /* Drop partly decoded SNDU, reset state, resync on PUSI. */
465 if (priv->ule_skb) {
466 dev_kfree_skb( priv->ule_skb );
467 ((struct dvb_net_priv *) dev->priv)->stats.rx_errors++;
468 ((struct dvb_net_priv *) dev->priv)->stats.rx_frame_errors++;
469 }
470 reset_ule(priv);
471 priv->need_pusi = 1;
472 continue;
473 }
474 /* Skip pointer field (we're processing a
475 * packed payload). */
476 from_where += 1;
477 ts_remain -= 1;
478 } else
479 priv->need_pusi = 0;
480
481 if (priv->ule_sndu_remain > 183) {
482 /* Current SNDU lacks more data than there could be available in the
483 * current TS cell. */
484 priv->stats.rx_errors++;
485 priv->stats.rx_length_errors++;
486 printk(KERN_WARNING "%lu: Expected %d more SNDU bytes, but "
487 "got PUSI (pf %d, ts_remain %d). Flushing incomplete payload.\n",
488 priv->ts_count, priv->ule_sndu_remain, ts[4], ts_remain);
489 dev_kfree_skb(priv->ule_skb);
490 /* Prepare for next SNDU. */
491 reset_ule(priv);
492 /* Resync: go to where pointer field points to: start of next ULE SNDU. */
493 from_where += ts[4];
494 ts_remain -= ts[4];
495 }
496 }
497 }
498
499 /* Check if new payload needs to be started. */
500 if (priv->ule_skb == NULL) {
501 /* Start a new payload with skb.
502 * Find ULE header. It is only guaranteed that the
503 * length field (2 bytes) is contained in the current
504 * TS.
505 * Check ts_remain has to be >= 2 here. */
506 if (ts_remain < 2) {
507 printk(KERN_WARNING "Invalid payload packing: only %d "
508 "bytes left in TS. Resyncing.\n", ts_remain);
509 priv->ule_sndu_len = 0;
510 priv->need_pusi = 1;
511 continue;
512 }
513
514 if (! priv->ule_sndu_len) {
515 /* Got at least two bytes, thus extrace the SNDU length. */
516 priv->ule_sndu_len = from_where[0] << 8 | from_where[1];
517 if (priv->ule_sndu_len & 0x8000) {
518 /* D-Bit is set: no dest mac present. */
519 priv->ule_sndu_len &= 0x7FFF;
520 priv->ule_dbit = 1;
521 } else
522 priv->ule_dbit = 0;
523
524 if (priv->ule_sndu_len < 5) {
525 printk(KERN_WARNING "%lu: Invalid ULE SNDU length %u. "
526 "Resyncing.\n", priv->ts_count, priv->ule_sndu_len);
527 priv->stats.rx_errors++;
528 priv->stats.rx_length_errors++;
529 priv->ule_sndu_len = 0;
530 priv->need_pusi = 1;
531 new_ts = 1;
532 ts += TS_SZ;
533 priv->ts_count++;
534 continue;
535 }
536 ts_remain -= 2; /* consume the 2 bytes SNDU length. */
537 from_where += 2;
538 }
539
540 /*
541 * State of current TS:
542 * ts_remain (remaining bytes in the current TS cell)
543 * 0 ule_type is not available now, we need the next TS cell
544 * 1 the first byte of the ule_type is present
545 * >=2 full ULE header present, maybe some payload data as well.
546 */
547 switch (ts_remain) {
548 case 1:
549 priv->ule_sndu_type = from_where[0] << 8;
550 priv->ule_sndu_type_1 = 1; /* first byte of ule_type is set. */
551 ts_remain -= 1; from_where += 1;
552 /* Continue w/ next TS. */
553 case 0:
554 new_ts = 1;
555 ts += TS_SZ;
556 priv->ts_count++;
557 continue;
558
559 default: /* complete ULE header is present in current TS. */
560 /* Extract ULE type field. */
561 if (priv->ule_sndu_type_1) {
562 priv->ule_sndu_type |= from_where[0];
563 from_where += 1; /* points to payload start. */
564 ts_remain -= 1;
565 } else {
566 /* Complete type is present in new TS. */
567 priv->ule_sndu_type = from_where[0] << 8 | from_where[1];
568 from_where += 2; /* points to payload start. */
569 ts_remain -= 2;
570 }
571 break;
572 }
573
574 /* Allocate the skb (decoder target buffer) with the correct size, as follows:
575 * prepare for the largest case: bridged SNDU with MAC address (dbit = 0). */
576 priv->ule_skb = dev_alloc_skb( priv->ule_sndu_len + ETH_HLEN + ETH_ALEN );
577 if (priv->ule_skb == NULL) {
578 printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n",
579 dev->name);
580 ((struct dvb_net_priv *)dev->priv)->stats.rx_dropped++;
581 return;
582 }
583
584 /* This includes the CRC32 _and_ dest mac, if !dbit. */
585 priv->ule_sndu_remain = priv->ule_sndu_len;
586 priv->ule_skb->dev = dev;
587 /* Leave space for Ethernet or bridged SNDU header (eth hdr plus one MAC addr). */
588 skb_reserve( priv->ule_skb, ETH_HLEN + ETH_ALEN );
589 }
590
591 /* Copy data into our current skb. */
592 how_much = min(priv->ule_sndu_remain, (int)ts_remain);
593 memcpy(skb_put(priv->ule_skb, how_much), from_where, how_much);
594 priv->ule_sndu_remain -= how_much;
595 ts_remain -= how_much;
596 from_where += how_much;
597
598 /* Check for complete payload. */
599 if (priv->ule_sndu_remain <= 0) {
600 /* Check CRC32, we've got it in our skb already. */
601 unsigned short ulen = htons(priv->ule_sndu_len);
602 unsigned short utype = htons(priv->ule_sndu_type);
603 const u8 *tail;
604 struct kvec iov[3] = {
605 { &ulen, sizeof ulen },
606 { &utype, sizeof utype },
607 { priv->ule_skb->data, priv->ule_skb->len - 4 }
608 };
609 u32 ule_crc = ~0L, expected_crc;
610 if (priv->ule_dbit) {
611 /* Set D-bit for CRC32 verification,
612 * if it was set originally. */
613 ulen |= 0x0080;
614 }
615
616 ule_crc = iov_crc32(ule_crc, iov, 3);
617 tail = skb_tail_pointer(priv->ule_skb);
618 expected_crc = *(tail - 4) << 24 |
619 *(tail - 3) << 16 |
620 *(tail - 2) << 8 |
621 *(tail - 1);
622 if (ule_crc != expected_crc) {
623 printk(KERN_WARNING "%lu: CRC32 check FAILED: %08x / %08x, SNDU len %d type %#x, ts_remain %d, next 2: %x.\n",
624 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);
625
626 #ifdef ULE_DEBUG
627 hexdump( iov[0].iov_base, iov[0].iov_len );
628 hexdump( iov[1].iov_base, iov[1].iov_len );
629 hexdump( iov[2].iov_base, iov[2].iov_len );
630
631 if (ule_where == ule_hist) {
632 hexdump( &ule_hist[98*TS_SZ], TS_SZ );
633 hexdump( &ule_hist[99*TS_SZ], TS_SZ );
634 } else if (ule_where == &ule_hist[TS_SZ]) {
635 hexdump( &ule_hist[99*TS_SZ], TS_SZ );
636 hexdump( ule_hist, TS_SZ );
637 } else {
638 hexdump( ule_where - TS_SZ - TS_SZ, TS_SZ );
639 hexdump( ule_where - TS_SZ, TS_SZ );
640 }
641 ule_dump = 1;
642 #endif
643
644 priv->stats.rx_errors++;
645 priv->stats.rx_crc_errors++;
646 dev_kfree_skb(priv->ule_skb);
647 } else {
648 /* CRC32 verified OK. */
649 u8 dest_addr[ETH_ALEN];
650 static const u8 bc_addr[ETH_ALEN] =
651 { [ 0 ... ETH_ALEN-1] = 0xff };
652
653 /* CRC32 was OK. Remove it from skb. */
654 priv->ule_skb->tail -= 4;
655 priv->ule_skb->len -= 4;
656
657 if (!priv->ule_dbit) {
658 /*
659 * The destination MAC address is the
660 * next data in the skb. It comes
661 * before any extension headers.
662 *
663 * Check if the payload of this SNDU
664 * should be passed up the stack.
665 */
666 register int drop = 0;
667 if (priv->rx_mode != RX_MODE_PROMISC) {
668 if (priv->ule_skb->data[0] & 0x01) {
669 /* multicast or broadcast */
670 if (memcmp(priv->ule_skb->data, bc_addr, ETH_ALEN)) {
671 /* multicast */
672 if (priv->rx_mode == RX_MODE_MULTI) {
673 int i;
674 for(i = 0; i < priv->multi_num && memcmp(priv->ule_skb->data, priv->multi_macs[i], ETH_ALEN); i++)
675 ;
676 if (i == priv->multi_num)
677 drop = 1;
678 } else if (priv->rx_mode != RX_MODE_ALL_MULTI)
679 drop = 1; /* no broadcast; */
680 /* else: all multicast mode: accept all multicast packets */
681 }
682 /* else: broadcast */
683 }
684 else if (memcmp(priv->ule_skb->data, dev->dev_addr, ETH_ALEN))
685 drop = 1;
686 /* else: destination address matches the MAC address of our receiver device */
687 }
688 /* else: promiscious mode; pass everything up the stack */
689
690 if (drop) {
691 #ifdef ULE_DEBUG
692 dprintk("Dropping SNDU: MAC destination address does not match: dest addr: "MAC_ADDR_PRINTFMT", dev addr: "MAC_ADDR_PRINTFMT"\n",
693 MAX_ADDR_PRINTFMT_ARGS(priv->ule_skb->data), MAX_ADDR_PRINTFMT_ARGS(dev->dev_addr));
694 #endif
695 dev_kfree_skb(priv->ule_skb);
696 goto sndu_done;
697 }
698 else
699 {
700 skb_copy_from_linear_data(priv->ule_skb,
701 dest_addr,
702 ETH_ALEN);
703 skb_pull(priv->ule_skb, ETH_ALEN);
704 }
705 }
706
707 /* Handle ULE Extension Headers. */
708 if (priv->ule_sndu_type < 1536) {
709 /* There is an extension header. Handle it accordingly. */
710 int l = handle_ule_extensions(priv);
711 if (l < 0) {
712 /* Mandatory extension header unknown or TEST SNDU. Drop it. */
713 // printk( KERN_WARNING "Dropping SNDU, extension headers.\n" );
714 dev_kfree_skb(priv->ule_skb);
715 goto sndu_done;
716 }
717 skb_pull(priv->ule_skb, l);
718 }
719
720 /*
721 * Construct/assure correct ethernet header.
722 * Note: in bridged mode (priv->ule_bridged !=
723 * 0) we already have the (original) ethernet
724 * header at the start of the payload (after
725 * optional dest. address and any extension
726 * headers).
727 */
728
729 if (!priv->ule_bridged) {
730 skb_push(priv->ule_skb, ETH_HLEN);
731 ethh = (struct ethhdr *)priv->ule_skb->data;
732 if (!priv->ule_dbit) {
733 /* dest_addr buffer is only valid if priv->ule_dbit == 0 */
734 memcpy(ethh->h_dest, dest_addr, ETH_ALEN);
735 memset(ethh->h_source, 0, ETH_ALEN);
736 }
737 else /* zeroize source and dest */
738 memset( ethh, 0, ETH_ALEN*2 );
739
740 ethh->h_proto = htons(priv->ule_sndu_type);
741 }
742 /* else: skb is in correct state; nothing to do. */
743 priv->ule_bridged = 0;
744
745 /* Stuff into kernel's protocol stack. */
746 priv->ule_skb->protocol = dvb_net_eth_type_trans(priv->ule_skb, dev);
747 /* If D-bit is set (i.e. destination MAC address not present),
748 * receive the packet anyhow. */
749 /* if (priv->ule_dbit && skb->pkt_type == PACKET_OTHERHOST)
750 priv->ule_skb->pkt_type = PACKET_HOST; */
751 priv->stats.rx_packets++;
752 priv->stats.rx_bytes += priv->ule_skb->len;
753 netif_rx(priv->ule_skb);
754 }
755 sndu_done:
756 /* Prepare for next SNDU. */
757 reset_ule(priv);
758 }
759
760 /* More data in current TS (look at the bytes following the CRC32)? */
761 if (ts_remain >= 2 && *((unsigned short *)from_where) != 0xFFFF) {
762 /* Next ULE SNDU starts right there. */
763 new_ts = 0;
764 priv->ule_skb = NULL;
765 priv->ule_sndu_type_1 = 0;
766 priv->ule_sndu_len = 0;
767 // printk(KERN_WARNING "More data in current TS: [%#x %#x %#x %#x]\n",
768 // *(from_where + 0), *(from_where + 1),
769 // *(from_where + 2), *(from_where + 3));
770 // printk(KERN_WARNING "ts @ %p, stopped @ %p:\n", ts, from_where + 0);
771 // hexdump(ts, 188);
772 } else {
773 new_ts = 1;
774 ts += TS_SZ;
775 priv->ts_count++;
776 if (priv->ule_skb == NULL) {
777 priv->need_pusi = 1;
778 priv->ule_sndu_type_1 = 0;
779 priv->ule_sndu_len = 0;
780 }
781 }
782 } /* for all available TS cells */
783 }
784
785 static int dvb_net_ts_callback(const u8 *buffer1, size_t buffer1_len,
786 const u8 *buffer2, size_t buffer2_len,
787 struct dmx_ts_feed *feed, enum dmx_success success)
788 {
789 struct net_device *dev = feed->priv;
790
791 if (buffer2 != 0)
792 printk(KERN_WARNING "buffer2 not 0: %p.\n", buffer2);
793 if (buffer1_len > 32768)
794 printk(KERN_WARNING "length > 32k: %zu.\n", buffer1_len);
795 /* printk("TS callback: %u bytes, %u TS cells @ %p.\n",
796 buffer1_len, buffer1_len / TS_SZ, buffer1); */
797 dvb_net_ule(dev, buffer1, buffer1_len);
798 return 0;
799 }
800
801
802 static void dvb_net_sec(struct net_device *dev, u8 *pkt, int pkt_len)
803 {
804 u8 *eth;
805 struct sk_buff *skb;
806 struct net_device_stats *stats = &(((struct dvb_net_priv *) dev->priv)->stats);
807 int snap = 0;
808
809 /* note: pkt_len includes a 32bit checksum */
810 if (pkt_len < 16) {
811 printk("%s: IP/MPE packet length = %d too small.\n",
812 dev->name, pkt_len);
813 stats->rx_errors++;
814 stats->rx_length_errors++;
815 return;
816 }
817 /* it seems some ISPs manage to screw up here, so we have to
818 * relax the error checks... */
819 #if 0
820 if ((pkt[5] & 0xfd) != 0xc1) {
821 /* drop scrambled or broken packets */
822 #else
823 if ((pkt[5] & 0x3c) != 0x00) {
824 /* drop scrambled */
825 #endif
826 stats->rx_errors++;
827 stats->rx_crc_errors++;
828 return;
829 }
830 if (pkt[5] & 0x02) {
831 /* handle LLC/SNAP, see rfc-1042 */
832 if (pkt_len < 24 || memcmp(&pkt[12], "\xaa\xaa\x03\0\0\0", 6)) {
833 stats->rx_dropped++;
834 return;
835 }
836 snap = 8;
837 }
838 if (pkt[7]) {
839 /* FIXME: assemble datagram from multiple sections */
840 stats->rx_errors++;
841 stats->rx_frame_errors++;
842 return;
843 }
844
845 /* we have 14 byte ethernet header (ip header follows);
846 * 12 byte MPE header; 4 byte checksum; + 2 byte alignment, 8 byte LLC/SNAP
847 */
848 if (!(skb = dev_alloc_skb(pkt_len - 4 - 12 + 14 + 2 - snap))) {
849 //printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n", dev->name);
850 stats->rx_dropped++;
851 return;
852 }
853 skb_reserve(skb, 2); /* longword align L3 header */
854 skb->dev = dev;
855
856 /* copy L3 payload */
857 eth = (u8 *) skb_put(skb, pkt_len - 12 - 4 + 14 - snap);
858 memcpy(eth + 14, pkt + 12 + snap, pkt_len - 12 - 4 - snap);
859
860 /* create ethernet header: */
861 eth[0]=pkt[0x0b];
862 eth[1]=pkt[0x0a];
863 eth[2]=pkt[0x09];
864 eth[3]=pkt[0x08];
865 eth[4]=pkt[0x04];
866 eth[5]=pkt[0x03];
867
868 eth[6]=eth[7]=eth[8]=eth[9]=eth[10]=eth[11]=0;
869
870 if (snap) {
871 eth[12] = pkt[18];
872 eth[13] = pkt[19];
873 } else {
874 /* protocol numbers are from rfc-1700 or
875 * http://www.iana.org/assignments/ethernet-numbers
876 */
877 if (pkt[12] >> 4 == 6) { /* version field from IP header */
878 eth[12] = 0x86; /* IPv6 */
879 eth[13] = 0xdd;
880 } else {
881 eth[12] = 0x08; /* IPv4 */
882 eth[13] = 0x00;
883 }
884 }
885
886 skb->protocol = dvb_net_eth_type_trans(skb, dev);
887
888 stats->rx_packets++;
889 stats->rx_bytes+=skb->len;
890 netif_rx(skb);
891 }
892
893 static int dvb_net_sec_callback(const u8 *buffer1, size_t buffer1_len,
894 const u8 *buffer2, size_t buffer2_len,
895 struct dmx_section_filter *filter,
896 enum dmx_success success)
897 {
898 struct net_device *dev = filter->priv;
899
900 /**
901 * we rely on the DVB API definition where exactly one complete
902 * section is delivered in buffer1
903 */
904 dvb_net_sec (dev, (u8*) buffer1, buffer1_len);
905 return 0;
906 }
907
908 static int dvb_net_tx(struct sk_buff *skb, struct net_device *dev)
909 {
910 dev_kfree_skb(skb);
911 return 0;
912 }
913
914 static u8 mask_normal[6]={0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
915 static u8 mask_allmulti[6]={0xff, 0xff, 0xff, 0x00, 0x00, 0x00};
916 static u8 mac_allmulti[6]={0x01, 0x00, 0x5e, 0x00, 0x00, 0x00};
917 static u8 mask_promisc[6]={0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
918
919 static int dvb_net_filter_sec_set(struct net_device *dev,
920 struct dmx_section_filter **secfilter,
921 u8 *mac, u8 *mac_mask)
922 {
923 struct dvb_net_priv *priv = dev->priv;
924 int ret;
925
926 *secfilter=NULL;
927 ret = priv->secfeed->allocate_filter(priv->secfeed, secfilter);
928 if (ret<0) {
929 printk("%s: could not get filter\n", dev->name);
930 return ret;
931 }
932
933 (*secfilter)->priv=(void *) dev;
934
935 memset((*secfilter)->filter_value, 0x00, DMX_MAX_FILTER_SIZE);
936 memset((*secfilter)->filter_mask, 0x00, DMX_MAX_FILTER_SIZE);
937 memset((*secfilter)->filter_mode, 0xff, DMX_MAX_FILTER_SIZE);
938
939 (*secfilter)->filter_value[0]=0x3e;
940 (*secfilter)->filter_value[3]=mac[5];
941 (*secfilter)->filter_value[4]=mac[4];
942 (*secfilter)->filter_value[8]=mac[3];
943 (*secfilter)->filter_value[9]=mac[2];
944 (*secfilter)->filter_value[10]=mac[1];
945 (*secfilter)->filter_value[11]=mac[0];
946
947 (*secfilter)->filter_mask[0] = 0xff;
948 (*secfilter)->filter_mask[3] = mac_mask[5];
949 (*secfilter)->filter_mask[4] = mac_mask[4];
950 (*secfilter)->filter_mask[8] = mac_mask[3];
951 (*secfilter)->filter_mask[9] = mac_mask[2];
952 (*secfilter)->filter_mask[10] = mac_mask[1];
953 (*secfilter)->filter_mask[11]=mac_mask[0];
954
955 dprintk("%s: filter mac=%02x %02x %02x %02x %02x %02x\n",
956 dev->name, mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
957 dprintk("%s: filter mask=%02x %02x %02x %02x %02x %02x\n",
958 dev->name, mac_mask[0], mac_mask[1], mac_mask[2],
959 mac_mask[3], mac_mask[4], mac_mask[5]);
960
961 return 0;
962 }
963
964 static int dvb_net_feed_start(struct net_device *dev)
965 {
966 int ret = 0, i;
967 struct dvb_net_priv *priv = dev->priv;
968 struct dmx_demux *demux = priv->demux;
969 unsigned char *mac = (unsigned char *) dev->dev_addr;
970
971 dprintk("%s: rx_mode %i\n", __FUNCTION__, priv->rx_mode);
972 mutex_lock(&priv->mutex);
973 if (priv->tsfeed || priv->secfeed || priv->secfilter || priv->multi_secfilter[0])
974 printk("%s: BUG %d\n", __FUNCTION__, __LINE__);
975
976 priv->secfeed=NULL;
977 priv->secfilter=NULL;
978 priv->tsfeed = NULL;
979
980 if (priv->feedtype == DVB_NET_FEEDTYPE_MPE) {
981 dprintk("%s: alloc secfeed\n", __FUNCTION__);
982 ret=demux->allocate_section_feed(demux, &priv->secfeed,
983 dvb_net_sec_callback);
984 if (ret<0) {
985 printk("%s: could not allocate section feed\n", dev->name);
986 goto error;
987 }
988
989 ret = priv->secfeed->set(priv->secfeed, priv->pid, 32768, 1);
990
991 if (ret<0) {
992 printk("%s: could not set section feed\n", dev->name);
993 priv->demux->release_section_feed(priv->demux, priv->secfeed);
994 priv->secfeed=NULL;
995 goto error;
996 }
997
998 if (priv->rx_mode != RX_MODE_PROMISC) {
999 dprintk("%s: set secfilter\n", __FUNCTION__);
1000 dvb_net_filter_sec_set(dev, &priv->secfilter, mac, mask_normal);
1001 }
1002
1003 switch (priv->rx_mode) {
1004 case RX_MODE_MULTI:
1005 for (i = 0; i < priv->multi_num; i++) {
1006 dprintk("%s: set multi_secfilter[%d]\n", __FUNCTION__, i);
1007 dvb_net_filter_sec_set(dev, &priv->multi_secfilter[i],
1008 priv->multi_macs[i], mask_normal);
1009 }
1010 break;
1011 case RX_MODE_ALL_MULTI:
1012 priv->multi_num=1;
1013 dprintk("%s: set multi_secfilter[0]\n", __FUNCTION__);
1014 dvb_net_filter_sec_set(dev, &priv->multi_secfilter[0],
1015 mac_allmulti, mask_allmulti);
1016 break;
1017 case RX_MODE_PROMISC:
1018 priv->multi_num=0;
1019 dprintk("%s: set secfilter\n", __FUNCTION__);
1020 dvb_net_filter_sec_set(dev, &priv->secfilter, mac, mask_promisc);
1021 break;
1022 }
1023
1024 dprintk("%s: start filtering\n", __FUNCTION__);
1025 priv->secfeed->start_filtering(priv->secfeed);
1026 } else if (priv->feedtype == DVB_NET_FEEDTYPE_ULE) {
1027 struct timespec timeout = { 0, 10000000 }; // 10 msec
1028
1029 /* we have payloads encapsulated in TS */
1030 dprintk("%s: alloc tsfeed\n", __FUNCTION__);
1031 ret = demux->allocate_ts_feed(demux, &priv->tsfeed, dvb_net_ts_callback);
1032 if (ret < 0) {
1033 printk("%s: could not allocate ts feed\n", dev->name);
1034 goto error;
1035 }
1036
1037 /* Set netdevice pointer for ts decaps callback. */
1038 priv->tsfeed->priv = (void *)dev;
1039 ret = priv->tsfeed->set(priv->tsfeed,
1040 priv->pid, /* pid */
1041 TS_PACKET, /* type */
1042 DMX_TS_PES_OTHER, /* pes type */
1043 32768, /* circular buffer size */
1044 timeout /* timeout */
1045 );
1046
1047 if (ret < 0) {
1048 printk("%s: could not set ts feed\n", dev->name);
1049 priv->demux->release_ts_feed(priv->demux, priv->tsfeed);
1050 priv->tsfeed = NULL;
1051 goto error;
1052 }
1053
1054 dprintk("%s: start filtering\n", __FUNCTION__);
1055 priv->tsfeed->start_filtering(priv->tsfeed);
1056 } else
1057 ret = -EINVAL;
1058
1059 error:
1060 mutex_unlock(&priv->mutex);
1061 return ret;
1062 }
1063
1064 static int dvb_net_feed_stop(struct net_device *dev)
1065 {
1066 struct dvb_net_priv *priv = dev->priv;
1067 int i, ret = 0;
1068
1069 dprintk("%s\n", __FUNCTION__);
1070 mutex_lock(&priv->mutex);
1071 if (priv->feedtype == DVB_NET_FEEDTYPE_MPE) {
1072 if (priv->secfeed) {
1073 if (priv->secfeed->is_filtering) {
1074 dprintk("%s: stop secfeed\n", __FUNCTION__);
1075 priv->secfeed->stop_filtering(priv->secfeed);
1076 }
1077
1078 if (priv->secfilter) {
1079 dprintk("%s: release secfilter\n", __FUNCTION__);
1080 priv->secfeed->release_filter(priv->secfeed,
1081 priv->secfilter);
1082 priv->secfilter=NULL;
1083 }
1084
1085 for (i=0; i<priv->multi_num; i++) {
1086 if (priv->multi_secfilter[i]) {
1087 dprintk("%s: release multi_filter[%d]\n",
1088 __FUNCTION__, i);
1089 priv->secfeed->release_filter(priv->secfeed,
1090 priv->multi_secfilter[i]);
1091 priv->multi_secfilter[i] = NULL;
1092 }
1093 }
1094
1095 priv->demux->release_section_feed(priv->demux, priv->secfeed);
1096 priv->secfeed = NULL;
1097 } else
1098 printk("%s: no feed to stop\n", dev->name);
1099 } else if (priv->feedtype == DVB_NET_FEEDTYPE_ULE) {
1100 if (priv->tsfeed) {
1101 if (priv->tsfeed->is_filtering) {
1102 dprintk("%s: stop tsfeed\n", __FUNCTION__);
1103 priv->tsfeed->stop_filtering(priv->tsfeed);
1104 }
1105 priv->demux->release_ts_feed(priv->demux, priv->tsfeed);
1106 priv->tsfeed = NULL;
1107 }
1108 else
1109 printk("%s: no ts feed to stop\n", dev->name);
1110 } else
1111 ret = -EINVAL;
1112 mutex_unlock(&priv->mutex);
1113 return ret;
1114 }
1115
1116
1117 static int dvb_set_mc_filter (struct net_device *dev, struct dev_mc_list *mc)
1118 {
1119 struct dvb_net_priv *priv = dev->priv;
1120
1121 if (priv->multi_num == DVB_NET_MULTICAST_MAX)
1122 return -ENOMEM;
1123
1124 memcpy(priv->multi_macs[priv->multi_num], mc->dmi_addr, 6);
1125
1126 priv->multi_num++;
1127 return 0;
1128 }
1129
1130
1131 static void wq_set_multicast_list (struct work_struct *work)
1132 {
1133 struct dvb_net_priv *priv =
1134 container_of(work, struct dvb_net_priv, set_multicast_list_wq);
1135 struct net_device *dev = priv->net;
1136
1137 dvb_net_feed_stop(dev);
1138 priv->rx_mode = RX_MODE_UNI;
1139 netif_tx_lock_bh(dev);
1140
1141 if (dev->flags & IFF_PROMISC) {
1142 dprintk("%s: promiscuous mode\n", dev->name);
1143 priv->rx_mode = RX_MODE_PROMISC;
1144 } else if ((dev->flags & IFF_ALLMULTI)) {
1145 dprintk("%s: allmulti mode\n", dev->name);
1146 priv->rx_mode = RX_MODE_ALL_MULTI;
1147 } else if (dev->mc_count) {
1148 int mci;
1149 struct dev_mc_list *mc;
1150
1151 dprintk("%s: set_mc_list, %d entries\n",
1152 dev->name, dev->mc_count);
1153
1154 priv->rx_mode = RX_MODE_MULTI;
1155 priv->multi_num = 0;
1156
1157 for (mci = 0, mc=dev->mc_list;
1158 mci < dev->mc_count;
1159 mc = mc->next, mci++) {
1160 dvb_set_mc_filter(dev, mc);
1161 }
1162 }
1163
1164 netif_tx_unlock_bh(dev);
1165 dvb_net_feed_start(dev);
1166 }
1167
1168
1169 static void dvb_net_set_multicast_list (struct net_device *dev)
1170 {
1171 struct dvb_net_priv *priv = dev->priv;
1172 schedule_work(&priv->set_multicast_list_wq);
1173 }
1174
1175
1176 static void wq_restart_net_feed (struct work_struct *work)
1177 {
1178 struct dvb_net_priv *priv =
1179 container_of(work, struct dvb_net_priv, restart_net_feed_wq);
1180 struct net_device *dev = priv->net;
1181
1182 if (netif_running(dev)) {
1183 dvb_net_feed_stop(dev);
1184 dvb_net_feed_start(dev);
1185 }
1186 }
1187
1188
1189 static int dvb_net_set_mac (struct net_device *dev, void *p)
1190 {
1191 struct dvb_net_priv *priv = dev->priv;
1192 struct sockaddr *addr=p;
1193
1194 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1195
1196 if (netif_running(dev))
1197 schedule_work(&priv->restart_net_feed_wq);
1198
1199 return 0;
1200 }
1201
1202
1203 static int dvb_net_open(struct net_device *dev)
1204 {
1205 struct dvb_net_priv *priv = dev->priv;
1206
1207 priv->in_use++;
1208 dvb_net_feed_start(dev);
1209 return 0;
1210 }
1211
1212
1213 static int dvb_net_stop(struct net_device *dev)
1214 {
1215 struct dvb_net_priv *priv = dev->priv;
1216
1217 priv->in_use--;
1218 return dvb_net_feed_stop(dev);
1219 }
1220
1221 static struct net_device_stats * dvb_net_get_stats(struct net_device *dev)
1222 {
1223 return &((struct dvb_net_priv*) dev->priv)->stats;
1224 }
1225
1226 static void dvb_net_setup(struct net_device *dev)
1227 {
1228 ether_setup(dev);
1229
1230 dev->open = dvb_net_open;
1231 dev->stop = dvb_net_stop;
1232 dev->hard_start_xmit = dvb_net_tx;
1233 dev->get_stats = dvb_net_get_stats;
1234 dev->set_multicast_list = dvb_net_set_multicast_list;
1235 dev->set_mac_address = dvb_net_set_mac;
1236 dev->mtu = 4096;
1237 dev->mc_count = 0;
1238 dev->hard_header_cache = NULL;
1239 dev->flags |= IFF_NOARP;
1240 }
1241
1242 static int get_if(struct dvb_net *dvbnet)
1243 {
1244 int i;
1245
1246 for (i=0; i<DVB_NET_DEVICES_MAX; i++)
1247 if (!dvbnet->state[i])
1248 break;
1249
1250 if (i == DVB_NET_DEVICES_MAX)
1251 return -1;
1252
1253 dvbnet->state[i]=1;
1254 return i;
1255 }
1256
1257 static int dvb_net_add_if(struct dvb_net *dvbnet, u16 pid, u8 feedtype)
1258 {
1259 struct net_device *net;
1260 struct dvb_net_priv *priv;
1261 int result;
1262 int if_num;
1263
1264 if (feedtype != DVB_NET_FEEDTYPE_MPE && feedtype != DVB_NET_FEEDTYPE_ULE)
1265 return -EINVAL;
1266 if ((if_num = get_if(dvbnet)) < 0)
1267 return -EINVAL;
1268
1269 net = alloc_netdev(sizeof(struct dvb_net_priv), "dvb", dvb_net_setup);
1270 if (!net)
1271 return -ENOMEM;
1272
1273 if (dvbnet->dvbdev->id)
1274 snprintf(net->name, IFNAMSIZ, "dvb%d%u%d",
1275 dvbnet->dvbdev->adapter->num, dvbnet->dvbdev->id, if_num);
1276 else
1277 /* compatibility fix to keep dvb0_0 format */
1278 snprintf(net->name, IFNAMSIZ, "dvb%d_%d",
1279 dvbnet->dvbdev->adapter->num, if_num);
1280
1281 net->addr_len = 6;
1282 memcpy(net->dev_addr, dvbnet->dvbdev->adapter->proposed_mac, 6);
1283
1284 dvbnet->device[if_num] = net;
1285
1286 priv = net->priv;
1287 priv->net = net;
1288 priv->demux = dvbnet->demux;
1289 priv->pid = pid;
1290 priv->rx_mode = RX_MODE_UNI;
1291 priv->need_pusi = 1;
1292 priv->tscc = 0;
1293 priv->feedtype = feedtype;
1294 reset_ule(priv);
1295
1296 INIT_WORK(&priv->set_multicast_list_wq, wq_set_multicast_list);
1297 INIT_WORK(&priv->restart_net_feed_wq, wq_restart_net_feed);
1298 mutex_init(&priv->mutex);
1299
1300 net->base_addr = pid;
1301
1302 if ((result = register_netdev(net)) < 0) {
1303 dvbnet->device[if_num] = NULL;
1304 free_netdev(net);
1305 return result;
1306 }
1307 printk("dvb_net: created network interface %s\n", net->name);
1308
1309 return if_num;
1310 }
1311
1312 static int dvb_net_remove_if(struct dvb_net *dvbnet, unsigned long num)
1313 {
1314 struct net_device *net = dvbnet->device[num];
1315 struct dvb_net_priv *priv;
1316
1317 if (!dvbnet->state[num])
1318 return -EINVAL;
1319 priv = net->priv;
1320 if (priv->in_use)
1321 return -EBUSY;
1322
1323 dvb_net_stop(net);
1324 flush_scheduled_work();
1325 printk("dvb_net: removed network interface %s\n", net->name);
1326 unregister_netdev(net);
1327 dvbnet->state[num]=0;
1328 dvbnet->device[num] = NULL;
1329 free_netdev(net);
1330
1331 return 0;
1332 }
1333
1334 static int dvb_net_do_ioctl(struct inode *inode, struct file *file,
1335 unsigned int cmd, void *parg)
1336 {
1337 struct dvb_device *dvbdev = file->private_data;
1338 struct dvb_net *dvbnet = dvbdev->priv;
1339
1340 if (((file->f_flags&O_ACCMODE)==O_RDONLY))
1341 return -EPERM;
1342
1343 switch (cmd) {
1344 case NET_ADD_IF:
1345 {
1346 struct dvb_net_if *dvbnetif = parg;
1347 int result;
1348
1349 if (!capable(CAP_SYS_ADMIN))
1350 return -EPERM;
1351
1352 if (!try_module_get(dvbdev->adapter->module))
1353 return -EPERM;
1354
1355 result=dvb_net_add_if(dvbnet, dvbnetif->pid, dvbnetif->feedtype);
1356 if (result<0) {
1357 module_put(dvbdev->adapter->module);
1358 return result;
1359 }
1360 dvbnetif->if_num=result;
1361 break;
1362 }
1363 case NET_GET_IF:
1364 {
1365 struct net_device *netdev;
1366 struct dvb_net_priv *priv_data;
1367 struct dvb_net_if *dvbnetif = parg;
1368
1369 if (dvbnetif->if_num >= DVB_NET_DEVICES_MAX ||
1370 !dvbnet->state[dvbnetif->if_num])
1371 return -EINVAL;
1372
1373 netdev = dvbnet->device[dvbnetif->if_num];
1374
1375 priv_data = netdev->priv;
1376 dvbnetif->pid=priv_data->pid;
1377 dvbnetif->feedtype=priv_data->feedtype;
1378 break;
1379 }
1380 case NET_REMOVE_IF:
1381 {
1382 int ret;
1383
1384 if (!capable(CAP_SYS_ADMIN))
1385 return -EPERM;
1386 if ((unsigned long) parg >= DVB_NET_DEVICES_MAX)
1387 return -EINVAL;
1388 ret = dvb_net_remove_if(dvbnet, (unsigned long) parg);
1389 if (!ret)
1390 module_put(dvbdev->adapter->module);
1391 return ret;
1392 }
1393
1394 /* binary compatiblity cruft */
1395 case __NET_ADD_IF_OLD:
1396 {
1397 struct __dvb_net_if_old *dvbnetif = parg;
1398 int result;
1399
1400 if (!capable(CAP_SYS_ADMIN))
1401 return -EPERM;
1402
1403 if (!try_module_get(dvbdev->adapter->module))
1404 return -EPERM;
1405
1406 result=dvb_net_add_if(dvbnet, dvbnetif->pid, DVB_NET_FEEDTYPE_MPE);
1407 if (result<0) {
1408 module_put(dvbdev->adapter->module);
1409 return result;
1410 }
1411 dvbnetif->if_num=result;
1412 break;
1413 }
1414 case __NET_GET_IF_OLD:
1415 {
1416 struct net_device *netdev;
1417 struct dvb_net_priv *priv_data;
1418 struct __dvb_net_if_old *dvbnetif = parg;
1419
1420 if (dvbnetif->if_num >= DVB_NET_DEVICES_MAX ||
1421 !dvbnet->state[dvbnetif->if_num])
1422 return -EINVAL;
1423
1424 netdev = dvbnet->device[dvbnetif->if_num];
1425
1426 priv_data = netdev->priv;
1427 dvbnetif->pid=priv_data->pid;
1428 break;
1429 }
1430 default:
1431 return -ENOTTY;
1432 }
1433 return 0;
1434 }
1435
1436 static int dvb_net_ioctl(struct inode *inode, struct file *file,
1437 unsigned int cmd, unsigned long arg)
1438 {
1439 return dvb_usercopy(inode, file, cmd, arg, dvb_net_do_ioctl);
1440 }
1441
1442 static int dvb_net_close(struct inode *inode, struct file *file)
1443 {
1444 struct dvb_device *dvbdev = file->private_data;
1445 struct dvb_net *dvbnet = dvbdev->priv;
1446
1447 if (!dvbdev)
1448 return -ENODEV;
1449
1450 if ((file->f_flags & O_ACCMODE) == O_RDONLY) {
1451 dvbdev->readers++;
1452 } else {
1453 dvbdev->writers++;
1454 }
1455
1456 dvbdev->users++;
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 struct file_operations dvb_net_fops = {
1468 .owner = THIS_MODULE,
1469 .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);
linux-next