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Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4
[net-next-2.6.git] / drivers / media / dvb / dvb-core / dvb_net.c
CommitLineData
1da177e4
LT		 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 *
18232ca6 15 * ULE Decaps according to RFC 4326.
1da177e4
LT		 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.
18232ca6
CP		 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.
1da177e4
LT		 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 *
1da177e4
LT		 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>
16ef8def 62#include <linux/smp_lock.h>
1da177e4
LT		 63#include <linux/uio.h>
64#include <asm/uaccess.h>
65#include <linux/crc32.h>
3593cab5 66#include <linux/mutex.h>
d43c36dc 67#include <linux/sched.h>
1da177e4
LT		 68
69#include "dvb_demux.h"
70#include "dvb_net.h"
71
72static int dvb_net_debug;
73module_param(dvb_net_debug, int, 0444);
74MODULE_PARM_DESC(dvb_net_debug, "enable debug messages");
75
76#define dprintk(x...) do { if (dvb_net_debug) printk(x); } while (0)
77
78
79static 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
18232ca6
CP		 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
1da177e4
LT		 97#define isprint(c) ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || (c >= '0' && c <= '9'))
98
99static 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
128struct dvb_net_priv {
129 int in_use;
1da177e4 130 u16 pid;
c4028958 131 struct net_device *net;
1da177e4
LT		 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. */
3593cab5 160 struct mutex mutex;
1da177e4
LT		 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 */
12fbcef1 172static __be16 dvb_net_eth_type_trans(struct sk_buff *skb,
1da177e4
LT		 173 struct net_device *dev)
174{
175 struct ethhdr *eth;
176 unsigned char *rawp;
177
98e399f8 178 skb_reset_mac_header(skb);
1da177e4 179 skb_pull(skb,dev->hard_header_len);
1da177e4 180 eth = eth_hdr(skb);
1da177e4
LT		 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
18232ca6
CP		 222#define ULE_OPTEXTHDR_PADDING 0
223
1da177e4
LT		 224static int ule_test_sndu( struct dvb_net_priv *p )
225{
226 return -1;
227}
228
229static int ule_bridged_sndu( struct dvb_net_priv *p )
230{
18232ca6
CP		 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.
1da177e4
LT		 244 */
245 p->ule_bridged = 1;
246 return 0;
247}
248
18232ca6
CP		 249static int ule_exthdr_padding(struct dvb_net_priv *p)
250{
251 return 0;
252}
1da177e4
LT		 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 */
259static 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. */
18232ca6
CP		 266 static int (*ule_optional_ext_handlers[255])( struct dvb_net_priv *p ) =
267 { [0] = ule_exthdr_padding, [1] = NULL, };
1da177e4
LT		 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 );
18232ca6
CP		 278 if(ext_len >= 0) {
279 p->ule_next_hdr += ext_len;
280 if (!p->ule_bridged) {
12fbcef1 281 p->ule_sndu_type = ntohs(*(__be16 *)p->ule_next_hdr);
18232ca6
CP		 282 p->ule_next_hdr += 2;
283 } else {
12fbcef1 284 p->ule_sndu_type = ntohs(*(__be16 *)(p->ule_next_hdr + ((p->ule_dbit ? 2 : 3) * ETH_ALEN)));
18232ca6
CP		 285 /* This assures the extension handling loop will terminate. */
286 }
1da177e4 287 }
18232ca6 288 // else: extension handler failed or SNDU should be discarded
1da177e4
LT		 289 } else
290 ext_len = -1; /* SNDU has to be discarded. */
291 } else {
292 /* Optional extension header. Calculate the length. */
18232ca6 293 ext_len = hlen << 1;
1da177e4
LT		 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;
12fbcef1 298 p->ule_sndu_type = ntohs( *(__be16 *)(p->ule_next_hdr-2) );
18232ca6
CP		 299 /*
300 * note: the length of the next header type is included in the
301 * length of THIS optional extension header
302 */
1da177e4
LT		 303 }
304
305 return ext_len;
306}
307
308static 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 );
18232ca6
CP		 315 if (l < 0)
316 return l; /* Stop extension header processing and discard SNDU. */
1da177e4 317 total_ext_len += l;
18232ca6
CP		 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
1da177e4
LT		 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. */
331static 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 */
347static void dvb_net_ule( struct net_device *dev, const u8 *buf, size_t buf_len )
348{
0eade1f9 349 struct dvb_net_priv *priv = netdev_priv(dev);
1da177e4 350 unsigned long skipped = 0L;
372280d2
TP		 351 const u8 *ts, *ts_end, *from_where = NULL;
352 u8 ts_remain = 0, how_much = 0, new_ts = 1;
1da177e4 353 struct ethhdr *ethh = NULL;
5c331fc8 354 bool error = false;
1da177e4
LT		 355
356#ifdef ULE_DEBUG
357 /* The code inside ULE_DEBUG keeps a history of the last 100 TS cells processed. */
358 static unsigned char ule_hist[100*TS_SZ];
ff699e6b 359 static unsigned char *ule_where = ule_hist, ule_dump;
1da177e4
LT		 360#endif
361
1da177e4
LT		 362 /* For all TS cells in current buffer.
363 * Appearently, we are called for every single TS cell.
364 */
372280d2 365 for (ts = buf, ts_end = buf + buf_len; ts < ts_end; /* no default incr. */ ) {
1da177e4
LT		 366
367 if (new_ts) {
368 /* We are about to process a new TS cell. */
369
370#ifdef ULE_DEBUG
371 if (ule_where >= &ule_hist[100*TS_SZ]) ule_where = ule_hist;
372 memcpy( ule_where, ts, TS_SZ );
373 if (ule_dump) {
374 hexdump( ule_where, TS_SZ );
375 ule_dump = 0;
376 }
377 ule_where += TS_SZ;
378#endif
379
380 /* Check TS error conditions: sync_byte, transport_error_indicator, scrambling_control . */
381 if ((ts[0] != TS_SYNC) || (ts[1] & TS_TEI) || ((ts[3] & TS_SC) != 0)) {
382 printk(KERN_WARNING "%lu: Invalid TS cell: SYNC %#x, TEI %u, SC %#x.\n",
383 priv->ts_count, ts[0], ts[1] & TS_TEI >> 7, ts[3] & 0xC0 >> 6);
384
385 /* Drop partly decoded SNDU, reset state, resync on PUSI. */
386 if (priv->ule_skb) {
387 dev_kfree_skb( priv->ule_skb );
388 /* Prepare for next SNDU. */
fb875333
SH		 389 dev->stats.rx_errors++;
390 dev->stats.rx_frame_errors++;
1da177e4
LT		 391 }
392 reset_ule(priv);
393 priv->need_pusi = 1;
394
395 /* Continue with next TS cell. */
396 ts += TS_SZ;
397 priv->ts_count++;
398 continue;
399 }
400
401 ts_remain = 184;
402 from_where = ts + 4;
403 }
404 /* Synchronize on PUSI, if required. */
405 if (priv->need_pusi) {
406 if (ts[1] & TS_PUSI) {
407 /* Find beginning of first ULE SNDU in current TS cell. */
408 /* Synchronize continuity counter. */
409 priv->tscc = ts[3] & 0x0F;
410 /* There is a pointer field here. */
411 if (ts[4] > ts_remain) {
412 printk(KERN_ERR "%lu: Invalid ULE packet "
413 "(pointer field %d)\n", priv->ts_count, ts[4]);
414 ts += TS_SZ;
415 priv->ts_count++;
416 continue;
417 }
418 /* Skip to destination of pointer field. */
419 from_where = &ts[5] + ts[4];
420 ts_remain -= 1 + ts[4];
421 skipped = 0;
422 } else {
423 skipped++;
424 ts += TS_SZ;
425 priv->ts_count++;
426 continue;
427 }
428 }
429
1da177e4 430 if (new_ts) {
18232ca6 431 /* Check continuity counter. */
1da177e4
LT		 432 if ((ts[3] & 0x0F) == priv->tscc)
433 priv->tscc = (priv->tscc + 1) & 0x0F;
434 else {
435 /* TS discontinuity handling: */
436 printk(KERN_WARNING "%lu: TS discontinuity: got %#x, "
18232ca6 437 "expected %#x.\n", priv->ts_count, ts[3] & 0x0F, priv->tscc);
1da177e4
LT		 438 /* Drop partly decoded SNDU, reset state, resync on PUSI. */
439 if (priv->ule_skb) {
440 dev_kfree_skb( priv->ule_skb );
441 /* Prepare for next SNDU. */
442 // reset_ule(priv); moved to below.
fb875333
SH		 443 dev->stats.rx_errors++;
444 dev->stats.rx_frame_errors++;
1da177e4
LT		 445 }
446 reset_ule(priv);
447 /* skip to next PUSI. */
448 priv->need_pusi = 1;
1da177e4
LT		 449 continue;
450 }
451 /* If we still have an incomplete payload, but PUSI is
452 * set; some TS cells are missing.
453 * This is only possible here, if we missed exactly 16 TS
454 * cells (continuity counter wrap). */
455 if (ts[1] & TS_PUSI) {
456 if (! priv->need_pusi) {
18232ca6 457 if (!(*from_where < (ts_remain-1)) || *from_where != priv->ule_sndu_remain) {
1da177e4
LT		 458 /* Pointer field is invalid. Drop this TS cell and any started ULE SNDU. */
459 printk(KERN_WARNING "%lu: Invalid pointer "
460 "field: %u.\n", priv->ts_count, *from_where);
461
462 /* Drop partly decoded SNDU, reset state, resync on PUSI. */
463 if (priv->ule_skb) {
5c331fc8
AWC		 464 error = true;
465 dev_kfree_skb(priv->ule_skb);
466 }
467
468 if (error || priv->ule_sndu_remain) {
fb875333
SH		 469 dev->stats.rx_errors++;
470 dev->stats.rx_frame_errors++;
5c331fc8 471 error = false;
1da177e4 472 }
5c331fc8 473
1da177e4
LT		 474 reset_ule(priv);
475 priv->need_pusi = 1;
1da177e4
LT		 476 continue;
477 }
478 /* Skip pointer field (we're processing a
479 * packed payload). */
480 from_where += 1;
481 ts_remain -= 1;
482 } else
483 priv->need_pusi = 0;
484
485 if (priv->ule_sndu_remain > 183) {
486 /* Current SNDU lacks more data than there could be available in the
487 * current TS cell. */
fb875333
SH		 488 dev->stats.rx_errors++;
489 dev->stats.rx_length_errors++;
1da177e4
LT		 490 printk(KERN_WARNING "%lu: Expected %d more SNDU bytes, but "
491 "got PUSI (pf %d, ts_remain %d). Flushing incomplete payload.\n",
492 priv->ts_count, priv->ule_sndu_remain, ts[4], ts_remain);
493 dev_kfree_skb(priv->ule_skb);
494 /* Prepare for next SNDU. */
495 reset_ule(priv);
496 /* Resync: go to where pointer field points to: start of next ULE SNDU. */
497 from_where += ts[4];
498 ts_remain -= ts[4];
499 }
500 }
501 }
502
503 /* Check if new payload needs to be started. */
504 if (priv->ule_skb == NULL) {
505 /* Start a new payload with skb.
506 * Find ULE header. It is only guaranteed that the
507 * length field (2 bytes) is contained in the current
508 * TS.
509 * Check ts_remain has to be >= 2 here. */
510 if (ts_remain < 2) {
511 printk(KERN_WARNING "Invalid payload packing: only %d "
512 "bytes left in TS. Resyncing.\n", ts_remain);
513 priv->ule_sndu_len = 0;
514 priv->need_pusi = 1;
29e1fa35 515 ts += TS_SZ;
1da177e4
LT		 516 continue;
517 }
518
519 if (! priv->ule_sndu_len) {
520 /* Got at least two bytes, thus extrace the SNDU length. */
521 priv->ule_sndu_len = from_where[0] << 8 | from_where[1];
522 if (priv->ule_sndu_len & 0x8000) {
523 /* D-Bit is set: no dest mac present. */
524 priv->ule_sndu_len &= 0x7FFF;
525 priv->ule_dbit = 1;
526 } else
527 priv->ule_dbit = 0;
528
18232ca6 529 if (priv->ule_sndu_len < 5) {
1da177e4
LT		 530 printk(KERN_WARNING "%lu: Invalid ULE SNDU length %u. "
531 "Resyncing.\n", priv->ts_count, priv->ule_sndu_len);
fb875333
SH		 532 dev->stats.rx_errors++;
533 dev->stats.rx_length_errors++;
1da177e4
LT		 534 priv->ule_sndu_len = 0;
535 priv->need_pusi = 1;
536 new_ts = 1;
537 ts += TS_SZ;
538 priv->ts_count++;
539 continue;
540 }
541 ts_remain -= 2; /* consume the 2 bytes SNDU length. */
542 from_where += 2;
543 }
544
5c331fc8 545 priv->ule_sndu_remain = priv->ule_sndu_len + 2;
1da177e4
LT		 546 /*
547 * State of current TS:
548 * ts_remain (remaining bytes in the current TS cell)
549 * 0 ule_type is not available now, we need the next TS cell
550 * 1 the first byte of the ule_type is present
551 * >=2 full ULE header present, maybe some payload data as well.
552 */
553 switch (ts_remain) {
554 case 1:
5c331fc8 555 priv->ule_sndu_remain--;
1da177e4
LT		 556 priv->ule_sndu_type = from_where[0] << 8;
557 priv->ule_sndu_type_1 = 1; /* first byte of ule_type is set. */
558 ts_remain -= 1; from_where += 1;
559 /* Continue w/ next TS. */
560 case 0:
561 new_ts = 1;
562 ts += TS_SZ;
563 priv->ts_count++;
564 continue;
565
566 default: /* complete ULE header is present in current TS. */
567 /* Extract ULE type field. */
568 if (priv->ule_sndu_type_1) {
5c331fc8 569 priv->ule_sndu_type_1 = 0;
1da177e4
LT		 570 priv->ule_sndu_type |= from_where[0];
571 from_where += 1; /* points to payload start. */
572 ts_remain -= 1;
573 } else {
574 /* Complete type is present in new TS. */
575 priv->ule_sndu_type = from_where[0] << 8 | from_where[1];
576 from_where += 2; /* points to payload start. */
577 ts_remain -= 2;
578 }
579 break;
580 }
581
582 /* Allocate the skb (decoder target buffer) with the correct size, as follows:
583 * prepare for the largest case: bridged SNDU with MAC address (dbit = 0). */
584 priv->ule_skb = dev_alloc_skb( priv->ule_sndu_len + ETH_HLEN + ETH_ALEN );
585 if (priv->ule_skb == NULL) {
586 printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n",
587 dev->name);
fb875333 588 dev->stats.rx_dropped++;
1da177e4
LT		 589 return;
590 }
591
592 /* This includes the CRC32 _and_ dest mac, if !dbit. */
593 priv->ule_sndu_remain = priv->ule_sndu_len;
594 priv->ule_skb->dev = dev;
595 /* Leave space for Ethernet or bridged SNDU header (eth hdr plus one MAC addr). */
596 skb_reserve( priv->ule_skb, ETH_HLEN + ETH_ALEN );
597 }
598
599 /* Copy data into our current skb. */
600 how_much = min(priv->ule_sndu_remain, (int)ts_remain);
601 memcpy(skb_put(priv->ule_skb, how_much), from_where, how_much);
602 priv->ule_sndu_remain -= how_much;
603 ts_remain -= how_much;
604 from_where += how_much;
605
606 /* Check for complete payload. */
607 if (priv->ule_sndu_remain <= 0) {
608 /* Check CRC32, we've got it in our skb already. */
12fbcef1
AV		 609 __be16 ulen = htons(priv->ule_sndu_len);
610 __be16 utype = htons(priv->ule_sndu_type);
27a884dc 611 const u8 *tail;
1da177e4
LT		 612 struct kvec iov[3] = {
613 { &ulen, sizeof ulen },
614 { &utype, sizeof utype },
615 { priv->ule_skb->data, priv->ule_skb->len - 4 }
616 };
dedcefb0 617 u32 ule_crc = ~0L, expected_crc;
1da177e4
LT		 618 if (priv->ule_dbit) {
619 /* Set D-bit for CRC32 verification,
620 * if it was set originally. */
f51b10ef 621 ulen |= htons(0x8000);
1da177e4
LT		 622 }
623
624 ule_crc = iov_crc32(ule_crc, iov, 3);
27a884dc
ACM		 625 tail = skb_tail_pointer(priv->ule_skb);
626 expected_crc = *(tail - 4) << 24 |
627 *(tail - 3) << 16 |
628 *(tail - 2) << 8 |
629 *(tail - 1);
1da177e4 630 if (ule_crc != expected_crc) {
5ef35be4 631 printk(KERN_WARNING "%lu: CRC32 check FAILED: %08x / %08x, SNDU len %d type %#x, ts_remain %d, next 2: %x.\n",
1da177e4
LT		 632 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);
633
634#ifdef ULE_DEBUG
635 hexdump( iov[0].iov_base, iov[0].iov_len );
636 hexdump( iov[1].iov_base, iov[1].iov_len );
637 hexdump( iov[2].iov_base, iov[2].iov_len );
638
639 if (ule_where == ule_hist) {
640 hexdump( &ule_hist[98*TS_SZ], TS_SZ );
641 hexdump( &ule_hist[99*TS_SZ], TS_SZ );
642 } else if (ule_where == &ule_hist[TS_SZ]) {
643 hexdump( &ule_hist[99*TS_SZ], TS_SZ );
644 hexdump( ule_hist, TS_SZ );
645 } else {
646 hexdump( ule_where - TS_SZ - TS_SZ, TS_SZ );
647 hexdump( ule_where - TS_SZ, TS_SZ );
648 }
649 ule_dump = 1;
650#endif
651
fb875333
SH		 652 dev->stats.rx_errors++;
653 dev->stats.rx_crc_errors++;
1da177e4
LT		 654 dev_kfree_skb(priv->ule_skb);
655 } else {
656 /* CRC32 verified OK. */
18232ca6
CP		 657 u8 dest_addr[ETH_ALEN];
658 static const u8 bc_addr[ETH_ALEN] =
659 { [ 0 ... ETH_ALEN-1] = 0xff };
660
661 /* CRC32 was OK. Remove it from skb. */
662 priv->ule_skb->tail -= 4;
663 priv->ule_skb->len -= 4;
664
665 if (!priv->ule_dbit) {
666 /*
667 * The destination MAC address is the
668 * next data in the skb. It comes
669 * before any extension headers.
670 *
671 * Check if the payload of this SNDU
672 * should be passed up the stack.
673 */
674 register int drop = 0;
675 if (priv->rx_mode != RX_MODE_PROMISC) {
676 if (priv->ule_skb->data[0] & 0x01) {
677 /* multicast or broadcast */
678 if (memcmp(priv->ule_skb->data, bc_addr, ETH_ALEN)) {
679 /* multicast */
680 if (priv->rx_mode == RX_MODE_MULTI) {
681 int i;
682 for(i = 0; i < priv->multi_num && memcmp(priv->ule_skb->data, priv->multi_macs[i], ETH_ALEN); i++)
683 ;
684 if (i == priv->multi_num)
685 drop = 1;
686 } else if (priv->rx_mode != RX_MODE_ALL_MULTI)
687 drop = 1; /* no broadcast; */
688 /* else: all multicast mode: accept all multicast packets */
689 }
690 /* else: broadcast */
691 }
692 else if (memcmp(priv->ule_skb->data, dev->dev_addr, ETH_ALEN))
693 drop = 1;
694 /* else: destination address matches the MAC address of our receiver device */
695 }
c84e6036 696 /* else: promiscuous mode; pass everything up the stack */
18232ca6
CP		 697
698 if (drop) {
699#ifdef ULE_DEBUG
700 dprintk("Dropping SNDU: MAC destination address does not match: dest addr: "MAC_ADDR_PRINTFMT", dev addr: "MAC_ADDR_PRINTFMT"\n",
701 MAX_ADDR_PRINTFMT_ARGS(priv->ule_skb->data), MAX_ADDR_PRINTFMT_ARGS(dev->dev_addr));
702#endif
703 dev_kfree_skb(priv->ule_skb);
704 goto sndu_done;
705 }
706 else
707 {
d626f62b
ACM		 708 skb_copy_from_linear_data(priv->ule_skb,
709 dest_addr,
710 ETH_ALEN);
18232ca6
CP		 711 skb_pull(priv->ule_skb, ETH_ALEN);
712 }
713 }
714
1da177e4
LT		 715 /* Handle ULE Extension Headers. */
716 if (priv->ule_sndu_type < 1536) {
717 /* There is an extension header. Handle it accordingly. */
18232ca6 718 int l = handle_ule_extensions(priv);
1da177e4
LT		 719 if (l < 0) {
720 /* Mandatory extension header unknown or TEST SNDU. Drop it. */
721 // printk( KERN_WARNING "Dropping SNDU, extension headers.\n" );
18232ca6 722 dev_kfree_skb(priv->ule_skb);
1da177e4
LT		 723 goto sndu_done;
724 }
18232ca6 725 skb_pull(priv->ule_skb, l);
1da177e4
LT		 726 }
727
18232ca6
CP		 728 /*
729 * Construct/assure correct ethernet header.
730 * Note: in bridged mode (priv->ule_bridged !=
731 * 0) we already have the (original) ethernet
732 * header at the start of the payload (after
733 * optional dest. address and any extension
734 * headers).
735 */
736
737 if (!priv->ule_bridged) {
738 skb_push(priv->ule_skb, ETH_HLEN);
739 ethh = (struct ethhdr *)priv->ule_skb->data;
740 if (!priv->ule_dbit) {
741 /* dest_addr buffer is only valid if priv->ule_dbit == 0 */
742 memcpy(ethh->h_dest, dest_addr, ETH_ALEN);
743 memset(ethh->h_source, 0, ETH_ALEN);
1da177e4 744 }
18232ca6
CP		 745 else /* zeroize source and dest */
746 memset( ethh, 0, ETH_ALEN*2 );
747
748 ethh->h_proto = htons(priv->ule_sndu_type);
1da177e4 749 }
18232ca6 750 /* else: skb is in correct state; nothing to do. */
1da177e4
LT		 751 priv->ule_bridged = 0;
752
753 /* Stuff into kernel's protocol stack. */
754 priv->ule_skb->protocol = dvb_net_eth_type_trans(priv->ule_skb, dev);
755 /* If D-bit is set (i.e. destination MAC address not present),
756 * receive the packet anyhow. */
757 /* if (priv->ule_dbit && skb->pkt_type == PACKET_OTHERHOST)
758 priv->ule_skb->pkt_type = PACKET_HOST; */
fb875333
SH		 759 dev->stats.rx_packets++;
760 dev->stats.rx_bytes += priv->ule_skb->len;
1da177e4
LT		 761 netif_rx(priv->ule_skb);
762 }
763 sndu_done:
764 /* Prepare for next SNDU. */
765 reset_ule(priv);
766 }
767
768 /* More data in current TS (look at the bytes following the CRC32)? */
769 if (ts_remain >= 2 && *((unsigned short *)from_where) != 0xFFFF) {
770 /* Next ULE SNDU starts right there. */
771 new_ts = 0;
772 priv->ule_skb = NULL;
773 priv->ule_sndu_type_1 = 0;
774 priv->ule_sndu_len = 0;
775 // printk(KERN_WARNING "More data in current TS: [%#x %#x %#x %#x]\n",
776 // *(from_where + 0), *(from_where + 1),
777 // *(from_where + 2), *(from_where + 3));
778 // printk(KERN_WARNING "ts @ %p, stopped @ %p:\n", ts, from_where + 0);
779 // hexdump(ts, 188);
780 } else {
781 new_ts = 1;
782 ts += TS_SZ;
783 priv->ts_count++;
784 if (priv->ule_skb == NULL) {
785 priv->need_pusi = 1;
786 priv->ule_sndu_type_1 = 0;
787 priv->ule_sndu_len = 0;
788 }
789 }
790 } /* for all available TS cells */
791}
792
793static int dvb_net_ts_callback(const u8 *buffer1, size_t buffer1_len,
794 const u8 *buffer2, size_t buffer2_len,
795 struct dmx_ts_feed *feed, enum dmx_success success)
796{
0c53c70f 797 struct net_device *dev = feed->priv;
1da177e4 798
5fa1247a
AV		 799 if (buffer2)
800 printk(KERN_WARNING "buffer2 not NULL: %p.\n", buffer2);
1da177e4
LT		 801 if (buffer1_len > 32768)
802 printk(KERN_WARNING "length > 32k: %zu.\n", buffer1_len);
803 /* printk("TS callback: %u bytes, %u TS cells @ %p.\n",
afd1a0c9 804 buffer1_len, buffer1_len / TS_SZ, buffer1); */
1da177e4
LT		 805 dvb_net_ule(dev, buffer1, buffer1_len);
806 return 0;
807}
808
809
71be258b
MK		 810static void dvb_net_sec(struct net_device *dev,
811 const u8 *pkt, int pkt_len)
1da177e4 812{
afd1a0c9
MCC		 813 u8 *eth;
814 struct sk_buff *skb;
fb875333 815 struct net_device_stats *stats = &dev->stats;
59142330 816 int snap = 0;
1da177e4
LT		 817
818 /* note: pkt_len includes a 32bit checksum */
819 if (pkt_len < 16) {
820 printk("%s: IP/MPE packet length = %d too small.\n",
821 dev->name, pkt_len);
822 stats->rx_errors++;
823 stats->rx_length_errors++;
824 return;
825 }
826/* it seems some ISPs manage to screw up here, so we have to
827 * relax the error checks... */
828#if 0
829 if ((pkt[5] & 0xfd) != 0xc1) {
830 /* drop scrambled or broken packets */
831#else
832 if ((pkt[5] & 0x3c) != 0x00) {
833 /* drop scrambled */
834#endif
835 stats->rx_errors++;
836 stats->rx_crc_errors++;
837 return;
838 }
839 if (pkt[5] & 0x02) {
59142330
JS		 840 /* handle LLC/SNAP, see rfc-1042 */
841 if (pkt_len < 24 || memcmp(&pkt[12], "\xaa\xaa\x03\0\0\0", 6)) {
842 stats->rx_dropped++;
843 return;
844 }
845 snap = 8;
afd1a0c9 846 }
1da177e4
LT		 847 if (pkt[7]) {
848 /* FIXME: assemble datagram from multiple sections */
849 stats->rx_errors++;
850 stats->rx_frame_errors++;
851 return;
852 }
853
854 /* we have 14 byte ethernet header (ip header follows);
59142330 855 * 12 byte MPE header; 4 byte checksum; + 2 byte alignment, 8 byte LLC/SNAP
1da177e4 856 */
59142330 857 if (!(skb = dev_alloc_skb(pkt_len - 4 - 12 + 14 + 2 - snap))) {
1da177e4
LT		 858 //printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n", dev->name);
859 stats->rx_dropped++;
860 return;
861 }
862 skb_reserve(skb, 2); /* longword align L3 header */
863 skb->dev = dev;
864
865 /* copy L3 payload */
59142330
JS		 866 eth = (u8 *) skb_put(skb, pkt_len - 12 - 4 + 14 - snap);
867 memcpy(eth + 14, pkt + 12 + snap, pkt_len - 12 - 4 - snap);
1da177e4
LT		 868
869 /* create ethernet header: */
afd1a0c9
MCC		 870 eth[0]=pkt[0x0b];
871 eth[1]=pkt[0x0a];
872 eth[2]=pkt[0x09];
873 eth[3]=pkt[0x08];
874 eth[4]=pkt[0x04];
875 eth[5]=pkt[0x03];
1da177e4 876
afd1a0c9 877 eth[6]=eth[7]=eth[8]=eth[9]=eth[10]=eth[11]=0;
1da177e4 878
59142330
JS		 879 if (snap) {
880 eth[12] = pkt[18];
881 eth[13] = pkt[19];
882 } else {
883 /* protocol numbers are from rfc-1700 or
884 * http://www.iana.org/assignments/ethernet-numbers
885 */
886 if (pkt[12] >> 4 == 6) { /* version field from IP header */
887 eth[12] = 0x86; /* IPv6 */
888 eth[13] = 0xdd;
889 } else {
890 eth[12] = 0x08; /* IPv4 */
891 eth[13] = 0x00;
892 }
893 }
1da177e4
LT		 894
895 skb->protocol = dvb_net_eth_type_trans(skb, dev);
896
897 stats->rx_packets++;
898 stats->rx_bytes+=skb->len;
afd1a0c9 899 netif_rx(skb);
1da177e4
LT		 900}
901
902static int dvb_net_sec_callback(const u8 *buffer1, size_t buffer1_len,
903 const u8 *buffer2, size_t buffer2_len,
904 struct dmx_section_filter *filter,
905 enum dmx_success success)
906{
afd1a0c9 907 struct net_device *dev = filter->priv;
1da177e4
LT		 908
909 /**
910 * we rely on the DVB API definition where exactly one complete
911 * section is delivered in buffer1
912 */
04b35abe 913 dvb_net_sec (dev, buffer1, buffer1_len);
1da177e4
LT		 914 return 0;
915}
916
917static int dvb_net_tx(struct sk_buff *skb, struct net_device *dev)
918{
919 dev_kfree_skb(skb);
6ed10654 920 return NETDEV_TX_OK;
1da177e4
LT		 921}
922
923static u8 mask_normal[6]={0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
924static u8 mask_allmulti[6]={0xff, 0xff, 0xff, 0x00, 0x00, 0x00};
925static u8 mac_allmulti[6]={0x01, 0x00, 0x5e, 0x00, 0x00, 0x00};
926static u8 mask_promisc[6]={0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
927
928static int dvb_net_filter_sec_set(struct net_device *dev,
929 struct dmx_section_filter **secfilter,
930 u8 *mac, u8 *mac_mask)
931{
0eade1f9 932 struct dvb_net_priv *priv = netdev_priv(dev);
1da177e4
LT		 933 int ret;
934
935 *secfilter=NULL;
936 ret = priv->secfeed->allocate_filter(priv->secfeed, secfilter);
937 if (ret<0) {
938 printk("%s: could not get filter\n", dev->name);
939 return ret;
940 }
941
942 (*secfilter)->priv=(void *) dev;
943
944 memset((*secfilter)->filter_value, 0x00, DMX_MAX_FILTER_SIZE);
945 memset((*secfilter)->filter_mask, 0x00, DMX_MAX_FILTER_SIZE);
946 memset((*secfilter)->filter_mode, 0xff, DMX_MAX_FILTER_SIZE);
947
948 (*secfilter)->filter_value[0]=0x3e;
949 (*secfilter)->filter_value[3]=mac[5];
950 (*secfilter)->filter_value[4]=mac[4];
951 (*secfilter)->filter_value[8]=mac[3];
952 (*secfilter)->filter_value[9]=mac[2];
953 (*secfilter)->filter_value[10]=mac[1];
954 (*secfilter)->filter_value[11]=mac[0];
955
956 (*secfilter)->filter_mask[0] = 0xff;
957 (*secfilter)->filter_mask[3] = mac_mask[5];
958 (*secfilter)->filter_mask[4] = mac_mask[4];
959 (*secfilter)->filter_mask[8] = mac_mask[3];
960 (*secfilter)->filter_mask[9] = mac_mask[2];
961 (*secfilter)->filter_mask[10] = mac_mask[1];
962 (*secfilter)->filter_mask[11]=mac_mask[0];
963
0e05a613 964 dprintk("%s: filter mac=%pM\n", dev->name, mac);
965 dprintk("%s: filter mask=%pM\n", dev->name, mac_mask);
1da177e4
LT		 966
967 return 0;
968}
969
970static int dvb_net_feed_start(struct net_device *dev)
971{
1130ca45 972 int ret = 0, i;
0eade1f9 973 struct dvb_net_priv *priv = netdev_priv(dev);
afd1a0c9
MCC		 974 struct dmx_demux *demux = priv->demux;
975 unsigned char *mac = (unsigned char *) dev->dev_addr;
1da177e4 976
46b4f7c1 977 dprintk("%s: rx_mode %i\n", __func__, priv->rx_mode);
3593cab5 978 mutex_lock(&priv->mutex);
1da177e4 979 if (priv->tsfeed || priv->secfeed || priv->secfilter || priv->multi_secfilter[0])
46b4f7c1 980 printk("%s: BUG %d\n", __func__, __LINE__);
1da177e4
LT		 981
982 priv->secfeed=NULL;
983 priv->secfilter=NULL;
984 priv->tsfeed = NULL;
985
986 if (priv->feedtype == DVB_NET_FEEDTYPE_MPE) {
46b4f7c1 987 dprintk("%s: alloc secfeed\n", __func__);
1da177e4
LT		 988 ret=demux->allocate_section_feed(demux, &priv->secfeed,
989 dvb_net_sec_callback);
990 if (ret<0) {
991 printk("%s: could not allocate section feed\n", dev->name);
1130ca45 992 goto error;
1da177e4
LT		 993 }
994
5d2cd163 995 ret = priv->secfeed->set(priv->secfeed, priv->pid, 32768, 1);
1da177e4
LT		 996
997 if (ret<0) {
998 printk("%s: could not set section feed\n", dev->name);
999 priv->demux->release_section_feed(priv->demux, priv->secfeed);
1000 priv->secfeed=NULL;
1130ca45 1001 goto error;
1da177e4
LT		 1002 }
1003
1004 if (priv->rx_mode != RX_MODE_PROMISC) {
46b4f7c1 1005 dprintk("%s: set secfilter\n", __func__);
1da177e4
LT		 1006 dvb_net_filter_sec_set(dev, &priv->secfilter, mac, mask_normal);
1007 }
1008
1009 switch (priv->rx_mode) {
1010 case RX_MODE_MULTI:
1011 for (i = 0; i < priv->multi_num; i++) {
46b4f7c1 1012 dprintk("%s: set multi_secfilter[%d]\n", __func__, i);
1da177e4
LT		 1013 dvb_net_filter_sec_set(dev, &priv->multi_secfilter[i],
1014 priv->multi_macs[i], mask_normal);
1015 }
1016 break;
1017 case RX_MODE_ALL_MULTI:
1018 priv->multi_num=1;
46b4f7c1 1019 dprintk("%s: set multi_secfilter[0]\n", __func__);
1da177e4
LT		 1020 dvb_net_filter_sec_set(dev, &priv->multi_secfilter[0],
1021 mac_allmulti, mask_allmulti);
1022 break;
1023 case RX_MODE_PROMISC:
1024 priv->multi_num=0;
46b4f7c1 1025 dprintk("%s: set secfilter\n", __func__);
1da177e4
LT		 1026 dvb_net_filter_sec_set(dev, &priv->secfilter, mac, mask_promisc);
1027 break;
1028 }
1029
46b4f7c1 1030 dprintk("%s: start filtering\n", __func__);
1da177e4
LT		 1031 priv->secfeed->start_filtering(priv->secfeed);
1032 } else if (priv->feedtype == DVB_NET_FEEDTYPE_ULE) {
18232ca6 1033 struct timespec timeout = { 0, 10000000 }; // 10 msec
1da177e4
LT		 1034
1035 /* we have payloads encapsulated in TS */
46b4f7c1 1036 dprintk("%s: alloc tsfeed\n", __func__);
1da177e4
LT		 1037 ret = demux->allocate_ts_feed(demux, &priv->tsfeed, dvb_net_ts_callback);
1038 if (ret < 0) {
1039 printk("%s: could not allocate ts feed\n", dev->name);
1130ca45 1040 goto error;
1da177e4
LT		 1041 }
1042
1043 /* Set netdevice pointer for ts decaps callback. */
1044 priv->tsfeed->priv = (void *)dev;
18232ca6
CP		 1045 ret = priv->tsfeed->set(priv->tsfeed,
1046 priv->pid, /* pid */
1047 TS_PACKET, /* type */
1048 DMX_TS_PES_OTHER, /* pes type */
1da177e4 1049 32768, /* circular buffer size */
18232ca6
CP		 1050 timeout /* timeout */
1051 );
1da177e4
LT		 1052
1053 if (ret < 0) {
1054 printk("%s: could not set ts feed\n", dev->name);
1055 priv->demux->release_ts_feed(priv->demux, priv->tsfeed);
1056 priv->tsfeed = NULL;
1130ca45 1057 goto error;
1da177e4
LT		 1058 }
1059
46b4f7c1 1060 dprintk("%s: start filtering\n", __func__);
1da177e4
LT		 1061 priv->tsfeed->start_filtering(priv->tsfeed);
1062 } else
1130ca45 1063 ret = -EINVAL;
1da177e4 1064
1130ca45 1065error:
3593cab5 1066 mutex_unlock(&priv->mutex);
1130ca45 1067 return ret;
1da177e4
LT		 1068}
1069
1070static int dvb_net_feed_stop(struct net_device *dev)
1071{
0eade1f9 1072 struct dvb_net_priv *priv = netdev_priv(dev);
1130ca45 1073 int i, ret = 0;
1da177e4 1074
46b4f7c1 1075 dprintk("%s\n", __func__);
3593cab5 1076 mutex_lock(&priv->mutex);
1da177e4
LT		 1077 if (priv->feedtype == DVB_NET_FEEDTYPE_MPE) {
1078 if (priv->secfeed) {
1079 if (priv->secfeed->is_filtering) {
46b4f7c1 1080 dprintk("%s: stop secfeed\n", __func__);
1da177e4
LT		 1081 priv->secfeed->stop_filtering(priv->secfeed);
1082 }
1083
1084 if (priv->secfilter) {
46b4f7c1 1085 dprintk("%s: release secfilter\n", __func__);
1da177e4
LT		 1086 priv->secfeed->release_filter(priv->secfeed,
1087 priv->secfilter);
1088 priv->secfilter=NULL;
1089 }
1090
1091 for (i=0; i<priv->multi_num; i++) {
1092 if (priv->multi_secfilter[i]) {
1093 dprintk("%s: release multi_filter[%d]\n",
46b4f7c1 1094 __func__, i);
1da177e4
LT		 1095 priv->secfeed->release_filter(priv->secfeed,
1096 priv->multi_secfilter[i]);
1097 priv->multi_secfilter[i] = NULL;
1098 }
1099 }
1100
1101 priv->demux->release_section_feed(priv->demux, priv->secfeed);
1102 priv->secfeed = NULL;
1103 } else
1104 printk("%s: no feed to stop\n", dev->name);
1105 } else if (priv->feedtype == DVB_NET_FEEDTYPE_ULE) {
1106 if (priv->tsfeed) {
1107 if (priv->tsfeed->is_filtering) {
46b4f7c1 1108 dprintk("%s: stop tsfeed\n", __func__);
1da177e4
LT		 1109 priv->tsfeed->stop_filtering(priv->tsfeed);
1110 }
1111 priv->demux->release_ts_feed(priv->demux, priv->tsfeed);
1112 priv->tsfeed = NULL;
1113 }
1114 else
1115 printk("%s: no ts feed to stop\n", dev->name);
1116 } else
1130ca45 1117 ret = -EINVAL;
3593cab5 1118 mutex_unlock(&priv->mutex);
1130ca45 1119 return ret;
1da177e4
LT		 1120}
1121
1122
22bedad3 1123static int dvb_set_mc_filter(struct net_device *dev, unsigned char *addr)
1da177e4 1124{
0eade1f9 1125 struct dvb_net_priv *priv = netdev_priv(dev);
1da177e4
LT		 1126
1127 if (priv->multi_num == DVB_NET_MULTICAST_MAX)
1128 return -ENOMEM;
1129
22bedad3 1130 memcpy(priv->multi_macs[priv->multi_num], addr, ETH_ALEN);
1da177e4
LT		 1131
1132 priv->multi_num++;
1133 return 0;
1134}
1135
1136
c4028958 1137static void wq_set_multicast_list (struct work_struct *work)
1da177e4 1138{
c4028958
DH		 1139 struct dvb_net_priv *priv =
1140 container_of(work, struct dvb_net_priv, set_multicast_list_wq);
1141 struct net_device *dev = priv->net;
1da177e4
LT		 1142
1143 dvb_net_feed_stop(dev);
1da177e4 1144 priv->rx_mode = RX_MODE_UNI;
b9e40857 1145 netif_addr_lock_bh(dev);
1da177e4
LT		 1146
1147 if (dev->flags & IFF_PROMISC) {
1148 dprintk("%s: promiscuous mode\n", dev->name);
1149 priv->rx_mode = RX_MODE_PROMISC;
1150 } else if ((dev->flags & IFF_ALLMULTI)) {
1151 dprintk("%s: allmulti mode\n", dev->name);
1152 priv->rx_mode = RX_MODE_ALL_MULTI;
4cd24eaf 1153 } else if (!netdev_mc_empty(dev)) {
22bedad3 1154 struct netdev_hw_addr *ha;
1da177e4
LT		 1155
1156 dprintk("%s: set_mc_list, %d entries\n",
4cd24eaf 1157 dev->name, netdev_mc_count(dev));
1da177e4
LT		 1158
1159 priv->rx_mode = RX_MODE_MULTI;
1160 priv->multi_num = 0;
1161
22bedad3
JP		 1162 netdev_for_each_mc_addr(ha, dev)
1163 dvb_set_mc_filter(dev, ha->addr);
1da177e4
LT		 1164 }
1165
b9e40857 1166 netif_addr_unlock_bh(dev);
1da177e4
LT		 1167 dvb_net_feed_start(dev);
1168}
1169
1170
1171static void dvb_net_set_multicast_list (struct net_device *dev)
1172{
0eade1f9 1173 struct dvb_net_priv *priv = netdev_priv(dev);
1da177e4
LT		 1174 schedule_work(&priv->set_multicast_list_wq);
1175}
1176
1177
c4028958 1178static void wq_restart_net_feed (struct work_struct *work)
1da177e4 1179{
c4028958
DH		 1180 struct dvb_net_priv *priv =
1181 container_of(work, struct dvb_net_priv, restart_net_feed_wq);
1182 struct net_device *dev = priv->net;
1da177e4
LT		 1183
1184 if (netif_running(dev)) {
1185 dvb_net_feed_stop(dev);
1186 dvb_net_feed_start(dev);
1187 }
1188}
1189
1190
1191static int dvb_net_set_mac (struct net_device *dev, void *p)
1192{
0eade1f9 1193 struct dvb_net_priv *priv = netdev_priv(dev);
1da177e4
LT		 1194 struct sockaddr *addr=p;
1195
1196 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1197
1198 if (netif_running(dev))
1199 schedule_work(&priv->restart_net_feed_wq);
1200
1201 return 0;
1202}
1203
1204
1205static int dvb_net_open(struct net_device *dev)
1206{
0eade1f9 1207 struct dvb_net_priv *priv = netdev_priv(dev);
1da177e4
LT		 1208
1209 priv->in_use++;
1210 dvb_net_feed_start(dev);
1211 return 0;
1212}
1213
1214
1215static int dvb_net_stop(struct net_device *dev)
1216{
0eade1f9 1217 struct dvb_net_priv *priv = netdev_priv(dev);
1da177e4
LT		 1218
1219 priv->in_use--;
afd1a0c9 1220 return dvb_net_feed_stop(dev);
1da177e4
LT		 1221}
1222
3b04ddde
SH		 1223static const struct header_ops dvb_header_ops = {
1224 .create = eth_header,
1225 .parse = eth_header_parse,
1226 .rebuild = eth_rebuild_header,
1227};
1228
fb875333
SH		 1229
1230static const struct net_device_ops dvb_netdev_ops = {
1231 .ndo_open = dvb_net_open,
1232 .ndo_stop = dvb_net_stop,
1233 .ndo_start_xmit = dvb_net_tx,
1234 .ndo_set_multicast_list = dvb_net_set_multicast_list,
1235 .ndo_set_mac_address = dvb_net_set_mac,
1236 .ndo_change_mtu = eth_change_mtu,
1237 .ndo_validate_addr = eth_validate_addr,
1238};
1239
1da177e4
LT		 1240static void dvb_net_setup(struct net_device *dev)
1241{
1242 ether_setup(dev);
1243
3b04ddde 1244 dev->header_ops = &dvb_header_ops;
fb875333 1245 dev->netdev_ops = &dvb_netdev_ops;
1da177e4 1246 dev->mtu = 4096;
3b04ddde 1247
1da177e4
LT		 1248 dev->flags |= IFF_NOARP;
1249}
1250
1251static int get_if(struct dvb_net *dvbnet)
1252{
1253 int i;
1254
1255 for (i=0; i<DVB_NET_DEVICES_MAX; i++)
1256 if (!dvbnet->state[i])
1257 break;
1258
1259 if (i == DVB_NET_DEVICES_MAX)
1260 return -1;
1261
1262 dvbnet->state[i]=1;
1263 return i;
1264}
1265
1266static int dvb_net_add_if(struct dvb_net *dvbnet, u16 pid, u8 feedtype)
1267{
1268 struct net_device *net;
1269 struct dvb_net_priv *priv;
1270 int result;
1271 int if_num;
1272
1273 if (feedtype != DVB_NET_FEEDTYPE_MPE && feedtype != DVB_NET_FEEDTYPE_ULE)
1274 return -EINVAL;
1275 if ((if_num = get_if(dvbnet)) < 0)
1276 return -EINVAL;
1277
1278 net = alloc_netdev(sizeof(struct dvb_net_priv), "dvb", dvb_net_setup);
1279 if (!net)
1280 return -ENOMEM;
1281
1282 if (dvbnet->dvbdev->id)
1283 snprintf(net->name, IFNAMSIZ, "dvb%d%u%d",
1284 dvbnet->dvbdev->adapter->num, dvbnet->dvbdev->id, if_num);
1285 else
1286 /* compatibility fix to keep dvb0_0 format */
1287 snprintf(net->name, IFNAMSIZ, "dvb%d_%d",
1288 dvbnet->dvbdev->adapter->num, if_num);
1289
1290 net->addr_len = 6;
1291 memcpy(net->dev_addr, dvbnet->dvbdev->adapter->proposed_mac, 6);
1292
1293 dvbnet->device[if_num] = net;
1294
0eade1f9 1295 priv = netdev_priv(net);
c4028958 1296 priv->net = net;
1da177e4
LT		 1297 priv->demux = dvbnet->demux;
1298 priv->pid = pid;
1299 priv->rx_mode = RX_MODE_UNI;
1300 priv->need_pusi = 1;
1301 priv->tscc = 0;
1302 priv->feedtype = feedtype;
1303 reset_ule(priv);
1304
c4028958
DH		 1305 INIT_WORK(&priv->set_multicast_list_wq, wq_set_multicast_list);
1306 INIT_WORK(&priv->restart_net_feed_wq, wq_restart_net_feed);
3593cab5 1307 mutex_init(&priv->mutex);
1da177e4
LT		 1308
1309 net->base_addr = pid;
1310
1311 if ((result = register_netdev(net)) < 0) {
1312 dvbnet->device[if_num] = NULL;
1313 free_netdev(net);
1314 return result;
1315 }
1316 printk("dvb_net: created network interface %s\n", net->name);
1317
1318 return if_num;
1319}
1320
400b7083 1321static int dvb_net_remove_if(struct dvb_net *dvbnet, unsigned long num)
1da177e4
LT		 1322{
1323 struct net_device *net = dvbnet->device[num];
1324 struct dvb_net_priv *priv;
1325
1326 if (!dvbnet->state[num])
1327 return -EINVAL;
0eade1f9 1328 priv = netdev_priv(net);
1da177e4
LT		 1329 if (priv->in_use)
1330 return -EBUSY;
1331
1332 dvb_net_stop(net);
1333 flush_scheduled_work();
1334 printk("dvb_net: removed network interface %s\n", net->name);
1335 unregister_netdev(net);
1336 dvbnet->state[num]=0;
1337 dvbnet->device[num] = NULL;
1338 free_netdev(net);
1339
1340 return 0;
1341}
1342
16ef8def 1343static int dvb_net_do_ioctl(struct file *file,
1da177e4
LT		 1344 unsigned int cmd, void *parg)
1345{
0c53c70f
JS		 1346 struct dvb_device *dvbdev = file->private_data;
1347 struct dvb_net *dvbnet = dvbdev->priv;
1da177e4
LT		 1348
1349 if (((file->f_flags&O_ACCMODE)==O_RDONLY))
1350 return -EPERM;
1351
1352 switch (cmd) {
1353 case NET_ADD_IF:
1354 {
0c53c70f 1355 struct dvb_net_if *dvbnetif = parg;
1da177e4
LT		 1356 int result;
1357
1358 if (!capable(CAP_SYS_ADMIN))
1359 return -EPERM;
1360
1361 if (!try_module_get(dvbdev->adapter->module))
1362 return -EPERM;
1363
1364 result=dvb_net_add_if(dvbnet, dvbnetif->pid, dvbnetif->feedtype);
1365 if (result<0) {
1366 module_put(dvbdev->adapter->module);
1367 return result;
1368 }
1369 dvbnetif->if_num=result;
1370 break;
1371 }
1372 case NET_GET_IF:
1373 {
1374 struct net_device *netdev;
1375 struct dvb_net_priv *priv_data;
0c53c70f 1376 struct dvb_net_if *dvbnetif = parg;
1da177e4
LT		 1377
1378 if (dvbnetif->if_num >= DVB_NET_DEVICES_MAX ||
1379 !dvbnet->state[dvbnetif->if_num])
1380 return -EINVAL;
1381
1382 netdev = dvbnet->device[dvbnetif->if_num];
1383
0eade1f9 1384 priv_data = netdev_priv(netdev);
1da177e4
LT		 1385 dvbnetif->pid=priv_data->pid;
1386 dvbnetif->feedtype=priv_data->feedtype;
1387 break;
1388 }
1389 case NET_REMOVE_IF:
1390 {
1391 int ret;
1392
1393 if (!capable(CAP_SYS_ADMIN))
1394 return -EPERM;
e18828e4 1395 if ((unsigned long) parg >= DVB_NET_DEVICES_MAX)
1da177e4 1396 return -EINVAL;
e18828e4 1397 ret = dvb_net_remove_if(dvbnet, (unsigned long) parg);
1da177e4
LT		 1398 if (!ret)
1399 module_put(dvbdev->adapter->module);
1400 return ret;
1401 }
1402
06fe9fb4 1403 /* binary compatibility cruft */
1da177e4
LT		 1404 case __NET_ADD_IF_OLD:
1405 {
0c53c70f 1406 struct __dvb_net_if_old *dvbnetif = parg;
1da177e4
LT		 1407 int result;
1408
1409 if (!capable(CAP_SYS_ADMIN))
1410 return -EPERM;
1411
1412 if (!try_module_get(dvbdev->adapter->module))
1413 return -EPERM;
1414
1415 result=dvb_net_add_if(dvbnet, dvbnetif->pid, DVB_NET_FEEDTYPE_MPE);
1416 if (result<0) {
1417 module_put(dvbdev->adapter->module);
1418 return result;
1419 }
1420 dvbnetif->if_num=result;
1421 break;
1422 }
1423 case __NET_GET_IF_OLD:
1424 {
1425 struct net_device *netdev;
1426 struct dvb_net_priv *priv_data;
0c53c70f 1427 struct __dvb_net_if_old *dvbnetif = parg;
1da177e4
LT		 1428
1429 if (dvbnetif->if_num >= DVB_NET_DEVICES_MAX ||
1430 !dvbnet->state[dvbnetif->if_num])
1431 return -EINVAL;
1432
1433 netdev = dvbnet->device[dvbnetif->if_num];
1434
0eade1f9 1435 priv_data = netdev_priv(netdev);
1da177e4
LT		 1436 dvbnetif->pid=priv_data->pid;
1437 break;
1438 }
1439 default:
1440 return -ENOTTY;
1441 }
1442 return 0;
1443}
1444
16ef8def 1445static long dvb_net_ioctl(struct file *file,
1da177e4
LT		 1446 unsigned int cmd, unsigned long arg)
1447{
16ef8def
AB		 1448 int ret;
1449
1450 lock_kernel();
1451 ret = dvb_usercopy(file, cmd, arg, dvb_net_do_ioctl);
1452 unlock_kernel();
1453
1454 return ret;
1da177e4
LT		 1455}
1456
2c4d3364
MR		 1457static int dvb_net_close(struct inode *inode, struct file *file)
1458{
1459 struct dvb_device *dvbdev = file->private_data;
1460 struct dvb_net *dvbnet = dvbdev->priv;
1461
82e67246 1462 dvb_generic_release(inode, file);
2c4d3364 1463
82e67246 1464 if(dvbdev->users == 1 && dvbnet->exit == 1) {
2c4d3364
MR		 1465 fops_put(file->f_op);
1466 file->f_op = NULL;
1467 wake_up(&dvbdev->wait_queue);
1468 }
1469 return 0;
1470}
1471
1472
784e29d2 1473static const struct file_operations dvb_net_fops = {
1da177e4 1474 .owner = THIS_MODULE,
16ef8def 1475 .unlocked_ioctl = dvb_net_ioctl,
1da177e4 1476 .open = dvb_generic_open,
2c4d3364 1477 .release = dvb_net_close,
1da177e4
LT		 1478};
1479
1480static struct dvb_device dvbdev_net = {
afd1a0c9
MCC		 1481 .priv = NULL,
1482 .users = 1,
1483 .writers = 1,
1484 .fops = &dvb_net_fops,
1da177e4
LT		 1485};
1486
1487
1488void dvb_net_release (struct dvb_net *dvbnet)
1489{
1490 int i;
1491
2c4d3364
MR		 1492 dvbnet->exit = 1;
1493 if (dvbnet->dvbdev->users < 1)
1494 wait_event(dvbnet->dvbdev->wait_queue,
1495 dvbnet->dvbdev->users==1);
1496
1da177e4
LT		 1497 dvb_unregister_device(dvbnet->dvbdev);
1498
1499 for (i=0; i<DVB_NET_DEVICES_MAX; i++) {
1500 if (!dvbnet->state[i])
1501 continue;
1502 dvb_net_remove_if(dvbnet, i);
1503 }
1504}
1505EXPORT_SYMBOL(dvb_net_release);
1506
1507
1508int dvb_net_init (struct dvb_adapter *adap, struct dvb_net *dvbnet,
1509 struct dmx_demux *dmx)
1510{
1511 int i;
1512
1513 dvbnet->demux = dmx;
1514
1515 for (i=0; i<DVB_NET_DEVICES_MAX; i++)
1516 dvbnet->state[i] = 0;
1517
1518 dvb_register_device (adap, &dvbnet->dvbdev, &dvbdev_net,
1519 dvbnet, DVB_DEVICE_NET);
1520
1521 return 0;
1522}
1523EXPORT_SYMBOL(dvb_net_init);
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