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