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V4L/DVB (6025): Net_ule(): fix check-after-use
[deliverable/linux.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>
62#include <linux/uio.h>
63#include <asm/uaccess.h>
64#include <linux/crc32.h>
3593cab5 65#include <linux/mutex.h>
1da177e4
LT		 66
67#include "dvb_demux.h"
68#include "dvb_net.h"
69
70static int dvb_net_debug;
71module_param(dvb_net_debug, int, 0444);
72MODULE_PARM_DESC(dvb_net_debug, "enable debug messages");
73
74#define dprintk(x...) do { if (dvb_net_debug) printk(x); } while (0)
75
76
77static inline __u32 iov_crc32( __u32 c, struct kvec *iov, unsigned int cnt )
78{
79 unsigned int j;
80 for (j = 0; j < cnt; j++)
81 c = crc32_be( c, iov[j].iov_base, iov[j].iov_len );
82 return c;
83}
84
85
86#define DVB_NET_MULTICAST_MAX 10
87
88#undef ULE_DEBUG
89
90#ifdef ULE_DEBUG
91
18232ca6
CP		 92#define MAC_ADDR_PRINTFMT "%.2x:%.2x:%.2x:%.2x:%.2x:%.2x"
93#define MAX_ADDR_PRINTFMT_ARGS(macap) (macap)[0],(macap)[1],(macap)[2],(macap)[3],(macap)[4],(macap)[5]
94
1da177e4
LT		 95#define isprint(c) ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || (c >= '0' && c <= '9'))
96
97static void hexdump( const unsigned char *buf, unsigned short len )
98{
99 char str[80], octet[10];
100 int ofs, i, l;
101
102 for (ofs = 0; ofs < len; ofs += 16) {
103 sprintf( str, "%03d: ", ofs );
104
105 for (i = 0; i < 16; i++) {
106 if ((i + ofs) < len)
107 sprintf( octet, "%02x ", buf[ofs + i] );
108 else
109 strcpy( octet, " " );
110
111 strcat( str, octet );
112 }
113 strcat( str, " " );
114 l = strlen( str );
115
116 for (i = 0; (i < 16) && ((i + ofs) < len); i++)
117 str[l++] = isprint( buf[ofs + i] ) ? buf[ofs + i] : '.';
118
119 str[l] = '\0';
120 printk( KERN_WARNING "%s\n", str );
121 }
122}
123
124#endif
125
126struct dvb_net_priv {
127 int in_use;
128 struct net_device_stats stats;
129 u16 pid;
c4028958 130 struct net_device *net;
1da177e4
LT		 131 struct dvb_net *host;
132 struct dmx_demux *demux;
133 struct dmx_section_feed *secfeed;
134 struct dmx_section_filter *secfilter;
135 struct dmx_ts_feed *tsfeed;
136 int multi_num;
137 struct dmx_section_filter *multi_secfilter[DVB_NET_MULTICAST_MAX];
138 unsigned char multi_macs[DVB_NET_MULTICAST_MAX][6];
139 int rx_mode;
140#define RX_MODE_UNI 0
141#define RX_MODE_MULTI 1
142#define RX_MODE_ALL_MULTI 2
143#define RX_MODE_PROMISC 3
144 struct work_struct set_multicast_list_wq;
145 struct work_struct restart_net_feed_wq;
146 unsigned char feedtype; /* Either FEED_TYPE_ or FEED_TYPE_ULE */
147 int need_pusi; /* Set to 1, if synchronization on PUSI required. */
148 unsigned char tscc; /* TS continuity counter after sync on PUSI. */
149 struct sk_buff *ule_skb; /* ULE SNDU decodes into this buffer. */
150 unsigned char *ule_next_hdr; /* Pointer into skb to next ULE extension header. */
151 unsigned short ule_sndu_len; /* ULE SNDU length in bytes, w/o D-Bit. */
152 unsigned short ule_sndu_type; /* ULE SNDU type field, complete. */
153 unsigned char ule_sndu_type_1; /* ULE SNDU type field, if split across 2 TS cells. */
154 unsigned char ule_dbit; /* Whether the DestMAC address present
155 * or not (bit is set). */
156 unsigned char ule_bridged; /* Whether the ULE_BRIDGED extension header was found. */
157 int ule_sndu_remain; /* Nr. of bytes still required for current ULE SNDU. */
158 unsigned long ts_count; /* Current ts cell counter. */
3593cab5 159 struct mutex mutex;
1da177e4
LT		 160};
161
162
163/**
164 * Determine the packet's protocol ID. The rule here is that we
165 * assume 802.3 if the type field is short enough to be a length.
166 * This is normal practice and works for any 'now in use' protocol.
167 *
168 * stolen from eth.c out of the linux kernel, hacked for dvb-device
169 * by Michael Holzt <kju@debian.org>
170 */
171static unsigned short dvb_net_eth_type_trans(struct sk_buff *skb,
172 struct net_device *dev)
173{
174 struct ethhdr *eth;
175 unsigned char *rawp;
176
98e399f8 177 skb_reset_mac_header(skb);
1da177e4 178 skb_pull(skb,dev->hard_header_len);
1da177e4 179 eth = eth_hdr(skb);
1da177e4
LT		 180
181 if (*eth->h_dest & 1) {
182 if(memcmp(eth->h_dest,dev->broadcast, ETH_ALEN)==0)
183 skb->pkt_type=PACKET_BROADCAST;
184 else
185 skb->pkt_type=PACKET_MULTICAST;
186 }
187
188 if (ntohs(eth->h_proto) >= 1536)
189 return eth->h_proto;
190
191 rawp = skb->data;
192
193 /**
194 * This is a magic hack to spot IPX packets. Older Novell breaks
195 * the protocol design and runs IPX over 802.3 without an 802.2 LLC
196 * layer. We look for FFFF which isn't a used 802.2 SSAP/DSAP. This
197 * won't work for fault tolerant netware but does for the rest.
198 */
199 if (*(unsigned short *)rawp == 0xFFFF)
200 return htons(ETH_P_802_3);
201
202 /**
203 * Real 802.2 LLC
204 */
205 return htons(ETH_P_802_2);
206}
207
208#define TS_SZ 188
209#define TS_SYNC 0x47
210#define TS_TEI 0x80
211#define TS_SC 0xC0
212#define TS_PUSI 0x40
213#define TS_AF_A 0x20
214#define TS_AF_D 0x10
215
216/* ULE Extension Header handlers. */
217
218#define ULE_TEST 0
219#define ULE_BRIDGED 1
220
18232ca6
CP		 221#define ULE_OPTEXTHDR_PADDING 0
222
1da177e4
LT		 223static int ule_test_sndu( struct dvb_net_priv *p )
224{
225 return -1;
226}
227
228static int ule_bridged_sndu( struct dvb_net_priv *p )
229{
18232ca6
CP		 230 struct ethhdr *hdr = (struct ethhdr*) p->ule_next_hdr;
231 if(ntohs(hdr->h_proto) < 1536) {
232 int framelen = p->ule_sndu_len - ((p->ule_next_hdr+sizeof(struct ethhdr)) - p->ule_skb->data);
233 /* A frame Type < 1536 for a bridged frame, introduces a LLC Length field. */
234 if(framelen != ntohs(hdr->h_proto)) {
235 return -1;
236 }
237 }
238 /* Note:
239 * From RFC4326:
240 * "A bridged SNDU is a Mandatory Extension Header of Type 1.
241 * It must be the final (or only) extension header specified in the header chain of a SNDU."
242 * The 'ule_bridged' flag will cause the extension header processing loop to terminate.
1da177e4
LT		 243 */
244 p->ule_bridged = 1;
245 return 0;
246}
247
18232ca6
CP		 248static int ule_exthdr_padding(struct dvb_net_priv *p)
249{
250 return 0;
251}
1da177e4
LT		 252
253/** Handle ULE extension headers.
254 * Function is called after a successful CRC32 verification of an ULE SNDU to complete its decoding.
255 * Returns: >= 0: nr. of bytes consumed by next extension header
256 * -1: Mandatory extension header that is not recognized or TEST SNDU; discard.
257 */
258static int handle_one_ule_extension( struct dvb_net_priv *p )
259{
260 /* Table of mandatory extension header handlers. The header type is the index. */
261 static int (*ule_mandatory_ext_handlers[255])( struct dvb_net_priv *p ) =
262 { [0] = ule_test_sndu, [1] = ule_bridged_sndu, [2] = NULL, };
263
264 /* Table of optional extension header handlers. The header type is the index. */
18232ca6
CP		 265 static int (*ule_optional_ext_handlers[255])( struct dvb_net_priv *p ) =
266 { [0] = ule_exthdr_padding, [1] = NULL, };
1da177e4
LT		 267
268 int ext_len = 0;
269 unsigned char hlen = (p->ule_sndu_type & 0x0700) >> 8;
270 unsigned char htype = p->ule_sndu_type & 0x00FF;
271
272 /* Discriminate mandatory and optional extension headers. */
273 if (hlen == 0) {
274 /* Mandatory extension header */
275 if (ule_mandatory_ext_handlers[htype]) {
276 ext_len = ule_mandatory_ext_handlers[htype]( p );
18232ca6
CP		 277 if(ext_len >= 0) {
278 p->ule_next_hdr += ext_len;
279 if (!p->ule_bridged) {
280 p->ule_sndu_type = ntohs(*(unsigned short *)p->ule_next_hdr);
281 p->ule_next_hdr += 2;
282 } else {
283 p->ule_sndu_type = ntohs(*(unsigned short *)(p->ule_next_hdr + ((p->ule_dbit ? 2 : 3) * ETH_ALEN)));
284 /* This assures the extension handling loop will terminate. */
285 }
1da177e4 286 }
18232ca6 287 // else: extension handler failed or SNDU should be discarded
1da177e4
LT		 288 } else
289 ext_len = -1; /* SNDU has to be discarded. */
290 } else {
291 /* Optional extension header. Calculate the length. */
18232ca6 292 ext_len = hlen << 1;
1da177e4
LT		 293 /* Process the optional extension header according to its type. */
294 if (ule_optional_ext_handlers[htype])
295 (void)ule_optional_ext_handlers[htype]( p );
296 p->ule_next_hdr += ext_len;
18232ca6
CP		 297 p->ule_sndu_type = ntohs( *(unsigned short *)(p->ule_next_hdr-2) );
298 /*
299 * note: the length of the next header type is included in the
300 * length of THIS optional extension header
301 */
1da177e4
LT		 302 }
303
304 return ext_len;
305}
306
307static int handle_ule_extensions( struct dvb_net_priv *p )
308{
309 int total_ext_len = 0, l;
310
311 p->ule_next_hdr = p->ule_skb->data;
312 do {
313 l = handle_one_ule_extension( p );
18232ca6
CP		 314 if (l < 0)
315 return l; /* Stop extension header processing and discard SNDU. */
1da177e4 316 total_ext_len += l;
18232ca6
CP		 317#ifdef ULE_DEBUG
318 dprintk("handle_ule_extensions: ule_next_hdr=%p, ule_sndu_type=%i, "
319 "l=%i, total_ext_len=%i\n", p->ule_next_hdr,
320 (int) p->ule_sndu_type, l, total_ext_len);
321#endif
1da177e4
LT		 322
323 } while (p->ule_sndu_type < 1536);
324
325 return total_ext_len;
326}
327
328
329/** Prepare for a new ULE SNDU: reset the decoder state. */
330static inline void reset_ule( struct dvb_net_priv *p )
331{
332 p->ule_skb = NULL;
333 p->ule_next_hdr = NULL;
334 p->ule_sndu_len = 0;
335 p->ule_sndu_type = 0;
336 p->ule_sndu_type_1 = 0;
337 p->ule_sndu_remain = 0;
338 p->ule_dbit = 0xFF;
339 p->ule_bridged = 0;
340}
341
342/**
343 * Decode ULE SNDUs according to draft-ietf-ipdvb-ule-03.txt from a sequence of
344 * TS cells of a single PID.
345 */
346static void dvb_net_ule( struct net_device *dev, const u8 *buf, size_t buf_len )
347{
0c53c70f 348 struct dvb_net_priv *priv = dev->priv;
1da177e4 349 unsigned long skipped = 0L;
372280d2
TP		 350 const u8 *ts, *ts_end, *from_where = NULL;
351 u8 ts_remain = 0, how_much = 0, new_ts = 1;
1da177e4
LT		 352 struct ethhdr *ethh = NULL;
353
354#ifdef ULE_DEBUG
355 /* The code inside ULE_DEBUG keeps a history of the last 100 TS cells processed. */
356 static unsigned char ule_hist[100*TS_SZ];
357 static unsigned char *ule_where = ule_hist, ule_dump = 0;
358#endif
359
1da177e4
LT		 360 /* For all TS cells in current buffer.
361 * Appearently, we are called for every single TS cell.
362 */
372280d2 363 for (ts = buf, ts_end = buf + buf_len; ts < ts_end; /* no default incr. */ ) {
1da177e4
LT		 364
365 if (new_ts) {
366 /* We are about to process a new TS cell. */
367
368#ifdef ULE_DEBUG
369 if (ule_where >= &ule_hist[100*TS_SZ]) ule_where = ule_hist;
370 memcpy( ule_where, ts, TS_SZ );
371 if (ule_dump) {
372 hexdump( ule_where, TS_SZ );
373 ule_dump = 0;
374 }
375 ule_where += TS_SZ;
376#endif
377
378 /* Check TS error conditions: sync_byte, transport_error_indicator, scrambling_control . */
379 if ((ts[0] != TS_SYNC) || (ts[1] & TS_TEI) || ((ts[3] & TS_SC) != 0)) {
380 printk(KERN_WARNING "%lu: Invalid TS cell: SYNC %#x, TEI %u, SC %#x.\n",
381 priv->ts_count, ts[0], ts[1] & TS_TEI >> 7, ts[3] & 0xC0 >> 6);
382
383 /* Drop partly decoded SNDU, reset state, resync on PUSI. */
384 if (priv->ule_skb) {
385 dev_kfree_skb( priv->ule_skb );
386 /* Prepare for next SNDU. */
18232ca6
CP		 387 priv->stats.rx_errors++;
388 priv->stats.rx_frame_errors++;
1da177e4
LT		 389 }
390 reset_ule(priv);
391 priv->need_pusi = 1;
392
393 /* Continue with next TS cell. */
394 ts += TS_SZ;
395 priv->ts_count++;
396 continue;
397 }
398
399 ts_remain = 184;
400 from_where = ts + 4;
401 }
402 /* Synchronize on PUSI, if required. */
403 if (priv->need_pusi) {
404 if (ts[1] & TS_PUSI) {
405 /* Find beginning of first ULE SNDU in current TS cell. */
406 /* Synchronize continuity counter. */
407 priv->tscc = ts[3] & 0x0F;
408 /* There is a pointer field here. */
409 if (ts[4] > ts_remain) {
410 printk(KERN_ERR "%lu: Invalid ULE packet "
411 "(pointer field %d)\n", priv->ts_count, ts[4]);
412 ts += TS_SZ;
413 priv->ts_count++;
414 continue;
415 }
416 /* Skip to destination of pointer field. */
417 from_where = &ts[5] + ts[4];
418 ts_remain -= 1 + ts[4];
419 skipped = 0;
420 } else {
421 skipped++;
422 ts += TS_SZ;
423 priv->ts_count++;
424 continue;
425 }
426 }
427
1da177e4 428 if (new_ts) {
18232ca6 429 /* Check continuity counter. */
1da177e4
LT		 430 if ((ts[3] & 0x0F) == priv->tscc)
431 priv->tscc = (priv->tscc + 1) & 0x0F;
432 else {
433 /* TS discontinuity handling: */
434 printk(KERN_WARNING "%lu: TS discontinuity: got %#x, "
18232ca6 435 "expected %#x.\n", priv->ts_count, ts[3] & 0x0F, priv->tscc);
1da177e4
LT		 436 /* Drop partly decoded SNDU, reset state, resync on PUSI. */
437 if (priv->ule_skb) {
438 dev_kfree_skb( priv->ule_skb );
439 /* Prepare for next SNDU. */
440 // reset_ule(priv); moved to below.
18232ca6
CP		 441 priv->stats.rx_errors++;
442 priv->stats.rx_frame_errors++;
1da177e4
LT		 443 }
444 reset_ule(priv);
445 /* skip to next PUSI. */
446 priv->need_pusi = 1;
1da177e4
LT		 447 continue;
448 }
449 /* If we still have an incomplete payload, but PUSI is
450 * set; some TS cells are missing.
451 * This is only possible here, if we missed exactly 16 TS
452 * cells (continuity counter wrap). */
453 if (ts[1] & TS_PUSI) {
454 if (! priv->need_pusi) {
18232ca6 455 if (!(*from_where < (ts_remain-1)) || *from_where != priv->ule_sndu_remain) {
1da177e4
LT		 456 /* Pointer field is invalid. Drop this TS cell and any started ULE SNDU. */
457 printk(KERN_WARNING "%lu: Invalid pointer "
458 "field: %u.\n", priv->ts_count, *from_where);
459
460 /* Drop partly decoded SNDU, reset state, resync on PUSI. */
461 if (priv->ule_skb) {
462 dev_kfree_skb( priv->ule_skb );
463 ((struct dvb_net_priv *) dev->priv)->stats.rx_errors++;
464 ((struct dvb_net_priv *) dev->priv)->stats.rx_frame_errors++;
465 }
466 reset_ule(priv);
467 priv->need_pusi = 1;
1da177e4
LT		 468 continue;
469 }
470 /* Skip pointer field (we're processing a
471 * packed payload). */
472 from_where += 1;
473 ts_remain -= 1;
474 } else
475 priv->need_pusi = 0;
476
477 if (priv->ule_sndu_remain > 183) {
478 /* Current SNDU lacks more data than there could be available in the
479 * current TS cell. */
18232ca6
CP		 480 priv->stats.rx_errors++;
481 priv->stats.rx_length_errors++;
1da177e4
LT		 482 printk(KERN_WARNING "%lu: Expected %d more SNDU bytes, but "
483 "got PUSI (pf %d, ts_remain %d). Flushing incomplete payload.\n",
484 priv->ts_count, priv->ule_sndu_remain, ts[4], ts_remain);
485 dev_kfree_skb(priv->ule_skb);
486 /* Prepare for next SNDU. */
487 reset_ule(priv);
488 /* Resync: go to where pointer field points to: start of next ULE SNDU. */
489 from_where += ts[4];
490 ts_remain -= ts[4];
491 }
492 }
493 }
494
495 /* Check if new payload needs to be started. */
496 if (priv->ule_skb == NULL) {
497 /* Start a new payload with skb.
498 * Find ULE header. It is only guaranteed that the
499 * length field (2 bytes) is contained in the current
500 * TS.
501 * Check ts_remain has to be >= 2 here. */
502 if (ts_remain < 2) {
503 printk(KERN_WARNING "Invalid payload packing: only %d "
504 "bytes left in TS. Resyncing.\n", ts_remain);
505 priv->ule_sndu_len = 0;
506 priv->need_pusi = 1;
507 continue;
508 }
509
510 if (! priv->ule_sndu_len) {
511 /* Got at least two bytes, thus extrace the SNDU length. */
512 priv->ule_sndu_len = from_where[0] << 8 | from_where[1];
513 if (priv->ule_sndu_len & 0x8000) {
514 /* D-Bit is set: no dest mac present. */
515 priv->ule_sndu_len &= 0x7FFF;
516 priv->ule_dbit = 1;
517 } else
518 priv->ule_dbit = 0;
519
18232ca6 520 if (priv->ule_sndu_len < 5) {
1da177e4
LT		 521 printk(KERN_WARNING "%lu: Invalid ULE SNDU length %u. "
522 "Resyncing.\n", priv->ts_count, priv->ule_sndu_len);
18232ca6
CP		 523 priv->stats.rx_errors++;
524 priv->stats.rx_length_errors++;
1da177e4
LT		 525 priv->ule_sndu_len = 0;
526 priv->need_pusi = 1;
527 new_ts = 1;
528 ts += TS_SZ;
529 priv->ts_count++;
530 continue;
531 }
532 ts_remain -= 2; /* consume the 2 bytes SNDU length. */
533 from_where += 2;
534 }
535
536 /*
537 * State of current TS:
538 * ts_remain (remaining bytes in the current TS cell)
539 * 0 ule_type is not available now, we need the next TS cell
540 * 1 the first byte of the ule_type is present
541 * >=2 full ULE header present, maybe some payload data as well.
542 */
543 switch (ts_remain) {
544 case 1:
545 priv->ule_sndu_type = from_where[0] << 8;
546 priv->ule_sndu_type_1 = 1; /* first byte of ule_type is set. */
547 ts_remain -= 1; from_where += 1;
548 /* Continue w/ next TS. */
549 case 0:
550 new_ts = 1;
551 ts += TS_SZ;
552 priv->ts_count++;
553 continue;
554
555 default: /* complete ULE header is present in current TS. */
556 /* Extract ULE type field. */
557 if (priv->ule_sndu_type_1) {
558 priv->ule_sndu_type |= from_where[0];
559 from_where += 1; /* points to payload start. */
560 ts_remain -= 1;
561 } else {
562 /* Complete type is present in new TS. */
563 priv->ule_sndu_type = from_where[0] << 8 | from_where[1];
564 from_where += 2; /* points to payload start. */
565 ts_remain -= 2;
566 }
567 break;
568 }
569
570 /* Allocate the skb (decoder target buffer) with the correct size, as follows:
571 * prepare for the largest case: bridged SNDU with MAC address (dbit = 0). */
572 priv->ule_skb = dev_alloc_skb( priv->ule_sndu_len + ETH_HLEN + ETH_ALEN );
573 if (priv->ule_skb == NULL) {
574 printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n",
575 dev->name);
576 ((struct dvb_net_priv *)dev->priv)->stats.rx_dropped++;
577 return;
578 }
579
580 /* This includes the CRC32 _and_ dest mac, if !dbit. */
581 priv->ule_sndu_remain = priv->ule_sndu_len;
582 priv->ule_skb->dev = dev;
583 /* Leave space for Ethernet or bridged SNDU header (eth hdr plus one MAC addr). */
584 skb_reserve( priv->ule_skb, ETH_HLEN + ETH_ALEN );
585 }
586
587 /* Copy data into our current skb. */
588 how_much = min(priv->ule_sndu_remain, (int)ts_remain);
589 memcpy(skb_put(priv->ule_skb, how_much), from_where, how_much);
590 priv->ule_sndu_remain -= how_much;
591 ts_remain -= how_much;
592 from_where += how_much;
593
594 /* Check for complete payload. */
595 if (priv->ule_sndu_remain <= 0) {
596 /* Check CRC32, we've got it in our skb already. */
597 unsigned short ulen = htons(priv->ule_sndu_len);
598 unsigned short utype = htons(priv->ule_sndu_type);
27a884dc 599 const u8 *tail;
1da177e4
LT		 600 struct kvec iov[3] = {
601 { &ulen, sizeof ulen },
602 { &utype, sizeof utype },
603 { priv->ule_skb->data, priv->ule_skb->len - 4 }
604 };
dedcefb0 605 u32 ule_crc = ~0L, expected_crc;
1da177e4
LT		 606 if (priv->ule_dbit) {
607 /* Set D-bit for CRC32 verification,
608 * if it was set originally. */
609 ulen |= 0x0080;
610 }
611
612 ule_crc = iov_crc32(ule_crc, iov, 3);
27a884dc
ACM		 613 tail = skb_tail_pointer(priv->ule_skb);
614 expected_crc = *(tail - 4) << 24 |
615 *(tail - 3) << 16 |
616 *(tail - 2) << 8 |
617 *(tail - 1);
1da177e4 618 if (ule_crc != expected_crc) {
5ef35be4 619 printk(KERN_WARNING "%lu: CRC32 check FAILED: %08x / %08x, SNDU len %d type %#x, ts_remain %d, next 2: %x.\n",
1da177e4
LT		 620 priv->ts_count, ule_crc, expected_crc, priv->ule_sndu_len, priv->ule_sndu_type, ts_remain, ts_remain > 2 ? *(unsigned short *)from_where : 0);
621
622#ifdef ULE_DEBUG
623 hexdump( iov[0].iov_base, iov[0].iov_len );
624 hexdump( iov[1].iov_base, iov[1].iov_len );
625 hexdump( iov[2].iov_base, iov[2].iov_len );
626
627 if (ule_where == ule_hist) {
628 hexdump( &ule_hist[98*TS_SZ], TS_SZ );
629 hexdump( &ule_hist[99*TS_SZ], TS_SZ );
630 } else if (ule_where == &ule_hist[TS_SZ]) {
631 hexdump( &ule_hist[99*TS_SZ], TS_SZ );
632 hexdump( ule_hist, TS_SZ );
633 } else {
634 hexdump( ule_where - TS_SZ - TS_SZ, TS_SZ );
635 hexdump( ule_where - TS_SZ, TS_SZ );
636 }
637 ule_dump = 1;
638#endif
639
18232ca6
CP		 640 priv->stats.rx_errors++;
641 priv->stats.rx_crc_errors++;
1da177e4
LT		 642 dev_kfree_skb(priv->ule_skb);
643 } else {
644 /* CRC32 verified OK. */
18232ca6
CP		 645 u8 dest_addr[ETH_ALEN];
646 static const u8 bc_addr[ETH_ALEN] =
647 { [ 0 ... ETH_ALEN-1] = 0xff };
648
649 /* CRC32 was OK. Remove it from skb. */
650 priv->ule_skb->tail -= 4;
651 priv->ule_skb->len -= 4;
652
653 if (!priv->ule_dbit) {
654 /*
655 * The destination MAC address is the
656 * next data in the skb. It comes
657 * before any extension headers.
658 *
659 * Check if the payload of this SNDU
660 * should be passed up the stack.
661 */
662 register int drop = 0;
663 if (priv->rx_mode != RX_MODE_PROMISC) {
664 if (priv->ule_skb->data[0] & 0x01) {
665 /* multicast or broadcast */
666 if (memcmp(priv->ule_skb->data, bc_addr, ETH_ALEN)) {
667 /* multicast */
668 if (priv->rx_mode == RX_MODE_MULTI) {
669 int i;
670 for(i = 0; i < priv->multi_num && memcmp(priv->ule_skb->data, priv->multi_macs[i], ETH_ALEN); i++)
671 ;
672 if (i == priv->multi_num)
673 drop = 1;
674 } else if (priv->rx_mode != RX_MODE_ALL_MULTI)
675 drop = 1; /* no broadcast; */
676 /* else: all multicast mode: accept all multicast packets */
677 }
678 /* else: broadcast */
679 }
680 else if (memcmp(priv->ule_skb->data, dev->dev_addr, ETH_ALEN))
681 drop = 1;
682 /* else: destination address matches the MAC address of our receiver device */
683 }
684 /* else: promiscious mode; pass everything up the stack */
685
686 if (drop) {
687#ifdef ULE_DEBUG
688 dprintk("Dropping SNDU: MAC destination address does not match: dest addr: "MAC_ADDR_PRINTFMT", dev addr: "MAC_ADDR_PRINTFMT"\n",
689 MAX_ADDR_PRINTFMT_ARGS(priv->ule_skb->data), MAX_ADDR_PRINTFMT_ARGS(dev->dev_addr));
690#endif
691 dev_kfree_skb(priv->ule_skb);
692 goto sndu_done;
693 }
694 else
695 {
d626f62b
ACM		 696 skb_copy_from_linear_data(priv->ule_skb,
697 dest_addr,
698 ETH_ALEN);
18232ca6
CP		 699 skb_pull(priv->ule_skb, ETH_ALEN);
700 }
701 }
702
1da177e4
LT		 703 /* Handle ULE Extension Headers. */
704 if (priv->ule_sndu_type < 1536) {
705 /* There is an extension header. Handle it accordingly. */
18232ca6 706 int l = handle_ule_extensions(priv);
1da177e4
LT		 707 if (l < 0) {
708 /* Mandatory extension header unknown or TEST SNDU. Drop it. */
709 // printk( KERN_WARNING "Dropping SNDU, extension headers.\n" );
18232ca6 710 dev_kfree_skb(priv->ule_skb);
1da177e4
LT		 711 goto sndu_done;
712 }
18232ca6 713 skb_pull(priv->ule_skb, l);
1da177e4
LT		 714 }
715
18232ca6
CP		 716 /*
717 * Construct/assure correct ethernet header.
718 * Note: in bridged mode (priv->ule_bridged !=
719 * 0) we already have the (original) ethernet
720 * header at the start of the payload (after
721 * optional dest. address and any extension
722 * headers).
723 */
724
725 if (!priv->ule_bridged) {
726 skb_push(priv->ule_skb, ETH_HLEN);
727 ethh = (struct ethhdr *)priv->ule_skb->data;
728 if (!priv->ule_dbit) {
729 /* dest_addr buffer is only valid if priv->ule_dbit == 0 */
730 memcpy(ethh->h_dest, dest_addr, ETH_ALEN);
731 memset(ethh->h_source, 0, ETH_ALEN);
1da177e4 732 }
18232ca6
CP		 733 else /* zeroize source and dest */
734 memset( ethh, 0, ETH_ALEN*2 );
735
736 ethh->h_proto = htons(priv->ule_sndu_type);
1da177e4 737 }
18232ca6 738 /* else: skb is in correct state; nothing to do. */
1da177e4
LT		 739 priv->ule_bridged = 0;
740
741 /* Stuff into kernel's protocol stack. */
742 priv->ule_skb->protocol = dvb_net_eth_type_trans(priv->ule_skb, dev);
743 /* If D-bit is set (i.e. destination MAC address not present),
744 * receive the packet anyhow. */
745 /* if (priv->ule_dbit && skb->pkt_type == PACKET_OTHERHOST)
746 priv->ule_skb->pkt_type = PACKET_HOST; */
18232ca6
CP		 747 priv->stats.rx_packets++;
748 priv->stats.rx_bytes += priv->ule_skb->len;
1da177e4
LT		 749 netif_rx(priv->ule_skb);
750 }
751 sndu_done:
752 /* Prepare for next SNDU. */
753 reset_ule(priv);
754 }
755
756 /* More data in current TS (look at the bytes following the CRC32)? */
757 if (ts_remain >= 2 && *((unsigned short *)from_where) != 0xFFFF) {
758 /* Next ULE SNDU starts right there. */
759 new_ts = 0;
760 priv->ule_skb = NULL;
761 priv->ule_sndu_type_1 = 0;
762 priv->ule_sndu_len = 0;
763 // printk(KERN_WARNING "More data in current TS: [%#x %#x %#x %#x]\n",
764 // *(from_where + 0), *(from_where + 1),
765 // *(from_where + 2), *(from_where + 3));
766 // printk(KERN_WARNING "ts @ %p, stopped @ %p:\n", ts, from_where + 0);
767 // hexdump(ts, 188);
768 } else {
769 new_ts = 1;
770 ts += TS_SZ;
771 priv->ts_count++;
772 if (priv->ule_skb == NULL) {
773 priv->need_pusi = 1;
774 priv->ule_sndu_type_1 = 0;
775 priv->ule_sndu_len = 0;
776 }
777 }
778 } /* for all available TS cells */
779}
780
781static int dvb_net_ts_callback(const u8 *buffer1, size_t buffer1_len,
782 const u8 *buffer2, size_t buffer2_len,
783 struct dmx_ts_feed *feed, enum dmx_success success)
784{
0c53c70f 785 struct net_device *dev = feed->priv;
1da177e4
LT		 786
787 if (buffer2 != 0)
788 printk(KERN_WARNING "buffer2 not 0: %p.\n", buffer2);
789 if (buffer1_len > 32768)
790 printk(KERN_WARNING "length > 32k: %zu.\n", buffer1_len);
791 /* printk("TS callback: %u bytes, %u TS cells @ %p.\n",
afd1a0c9 792 buffer1_len, buffer1_len / TS_SZ, buffer1); */
1da177e4
LT		 793 dvb_net_ule(dev, buffer1, buffer1_len);
794 return 0;
795}
796
797
04b35abe
MCC		 798static void dvb_net_sec(struct net_device *dev, const u8 *pkt, int
799pkt_len)
1da177e4 800{
afd1a0c9
MCC		 801 u8 *eth;
802 struct sk_buff *skb;
1da177e4 803 struct net_device_stats *stats = &(((struct dvb_net_priv *) dev->priv)->stats);
59142330 804 int snap = 0;
1da177e4
LT		 805
806 /* note: pkt_len includes a 32bit checksum */
807 if (pkt_len < 16) {
808 printk("%s: IP/MPE packet length = %d too small.\n",
809 dev->name, pkt_len);
810 stats->rx_errors++;
811 stats->rx_length_errors++;
812 return;
813 }
814/* it seems some ISPs manage to screw up here, so we have to
815 * relax the error checks... */
816#if 0
817 if ((pkt[5] & 0xfd) != 0xc1) {
818 /* drop scrambled or broken packets */
819#else
820 if ((pkt[5] & 0x3c) != 0x00) {
821 /* drop scrambled */
822#endif
823 stats->rx_errors++;
824 stats->rx_crc_errors++;
825 return;
826 }
827 if (pkt[5] & 0x02) {
59142330
JS		 828 /* handle LLC/SNAP, see rfc-1042 */
829 if (pkt_len < 24 || memcmp(&pkt[12], "\xaa\xaa\x03\0\0\0", 6)) {
830 stats->rx_dropped++;
831 return;
832 }
833 snap = 8;
afd1a0c9 834 }
1da177e4
LT		 835 if (pkt[7]) {
836 /* FIXME: assemble datagram from multiple sections */
837 stats->rx_errors++;
838 stats->rx_frame_errors++;
839 return;
840 }
841
842 /* we have 14 byte ethernet header (ip header follows);
59142330 843 * 12 byte MPE header; 4 byte checksum; + 2 byte alignment, 8 byte LLC/SNAP
1da177e4 844 */
59142330 845 if (!(skb = dev_alloc_skb(pkt_len - 4 - 12 + 14 + 2 - snap))) {
1da177e4
LT		 846 //printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n", dev->name);
847 stats->rx_dropped++;
848 return;
849 }
850 skb_reserve(skb, 2); /* longword align L3 header */
851 skb->dev = dev;
852
853 /* copy L3 payload */
59142330
JS		 854 eth = (u8 *) skb_put(skb, pkt_len - 12 - 4 + 14 - snap);
855 memcpy(eth + 14, pkt + 12 + snap, pkt_len - 12 - 4 - snap);
1da177e4
LT		 856
857 /* create ethernet header: */
afd1a0c9
MCC		 858 eth[0]=pkt[0x0b];
859 eth[1]=pkt[0x0a];
860 eth[2]=pkt[0x09];
861 eth[3]=pkt[0x08];
862 eth[4]=pkt[0x04];
863 eth[5]=pkt[0x03];
1da177e4 864
afd1a0c9 865 eth[6]=eth[7]=eth[8]=eth[9]=eth[10]=eth[11]=0;
1da177e4 866
59142330
JS		 867 if (snap) {
868 eth[12] = pkt[18];
869 eth[13] = pkt[19];
870 } else {
871 /* protocol numbers are from rfc-1700 or
872 * http://www.iana.org/assignments/ethernet-numbers
873 */
874 if (pkt[12] >> 4 == 6) { /* version field from IP header */
875 eth[12] = 0x86; /* IPv6 */
876 eth[13] = 0xdd;
877 } else {
878 eth[12] = 0x08; /* IPv4 */
879 eth[13] = 0x00;
880 }
881 }
1da177e4
LT		 882
883 skb->protocol = dvb_net_eth_type_trans(skb, dev);
884
885 stats->rx_packets++;
886 stats->rx_bytes+=skb->len;
afd1a0c9 887 netif_rx(skb);
1da177e4
LT		 888}
889
890static int dvb_net_sec_callback(const u8 *buffer1, size_t buffer1_len,
891 const u8 *buffer2, size_t buffer2_len,
892 struct dmx_section_filter *filter,
893 enum dmx_success success)
894{
afd1a0c9 895 struct net_device *dev = filter->priv;
1da177e4
LT		 896
897 /**
898 * we rely on the DVB API definition where exactly one complete
899 * section is delivered in buffer1
900 */
04b35abe 901 dvb_net_sec (dev, buffer1, buffer1_len);
1da177e4
LT		 902 return 0;
903}
904
905static int dvb_net_tx(struct sk_buff *skb, struct net_device *dev)
906{
907 dev_kfree_skb(skb);
908 return 0;
909}
910
911static u8 mask_normal[6]={0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
912static u8 mask_allmulti[6]={0xff, 0xff, 0xff, 0x00, 0x00, 0x00};
913static u8 mac_allmulti[6]={0x01, 0x00, 0x5e, 0x00, 0x00, 0x00};
914static u8 mask_promisc[6]={0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
915
916static int dvb_net_filter_sec_set(struct net_device *dev,
917 struct dmx_section_filter **secfilter,
918 u8 *mac, u8 *mac_mask)
919{
0c53c70f 920 struct dvb_net_priv *priv = dev->priv;
1da177e4
LT		 921 int ret;
922
923 *secfilter=NULL;
924 ret = priv->secfeed->allocate_filter(priv->secfeed, secfilter);
925 if (ret<0) {
926 printk("%s: could not get filter\n", dev->name);
927 return ret;
928 }
929
930 (*secfilter)->priv=(void *) dev;
931
932 memset((*secfilter)->filter_value, 0x00, DMX_MAX_FILTER_SIZE);
933 memset((*secfilter)->filter_mask, 0x00, DMX_MAX_FILTER_SIZE);
934 memset((*secfilter)->filter_mode, 0xff, DMX_MAX_FILTER_SIZE);
935
936 (*secfilter)->filter_value[0]=0x3e;
937 (*secfilter)->filter_value[3]=mac[5];
938 (*secfilter)->filter_value[4]=mac[4];
939 (*secfilter)->filter_value[8]=mac[3];
940 (*secfilter)->filter_value[9]=mac[2];
941 (*secfilter)->filter_value[10]=mac[1];
942 (*secfilter)->filter_value[11]=mac[0];
943
944 (*secfilter)->filter_mask[0] = 0xff;
945 (*secfilter)->filter_mask[3] = mac_mask[5];
946 (*secfilter)->filter_mask[4] = mac_mask[4];
947 (*secfilter)->filter_mask[8] = mac_mask[3];
948 (*secfilter)->filter_mask[9] = mac_mask[2];
949 (*secfilter)->filter_mask[10] = mac_mask[1];
950 (*secfilter)->filter_mask[11]=mac_mask[0];
951
952 dprintk("%s: filter mac=%02x %02x %02x %02x %02x %02x\n",
953 dev->name, mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
954 dprintk("%s: filter mask=%02x %02x %02x %02x %02x %02x\n",
955 dev->name, mac_mask[0], mac_mask[1], mac_mask[2],
956 mac_mask[3], mac_mask[4], mac_mask[5]);
957
958 return 0;
959}
960
961static int dvb_net_feed_start(struct net_device *dev)
962{
1130ca45 963 int ret = 0, i;
0c53c70f 964 struct dvb_net_priv *priv = dev->priv;
afd1a0c9
MCC		 965 struct dmx_demux *demux = priv->demux;
966 unsigned char *mac = (unsigned char *) dev->dev_addr;
1da177e4
LT		 967
968 dprintk("%s: rx_mode %i\n", __FUNCTION__, priv->rx_mode);
3593cab5 969 mutex_lock(&priv->mutex);
1da177e4
LT		 970 if (priv->tsfeed || priv->secfeed || priv->secfilter || priv->multi_secfilter[0])
971 printk("%s: BUG %d\n", __FUNCTION__, __LINE__);
972
973 priv->secfeed=NULL;
974 priv->secfilter=NULL;
975 priv->tsfeed = NULL;
976
977 if (priv->feedtype == DVB_NET_FEEDTYPE_MPE) {
978 dprintk("%s: alloc secfeed\n", __FUNCTION__);
979 ret=demux->allocate_section_feed(demux, &priv->secfeed,
980 dvb_net_sec_callback);
981 if (ret<0) {
982 printk("%s: could not allocate section feed\n", dev->name);
1130ca45 983 goto error;
1da177e4
LT		 984 }
985
5d2cd163 986 ret = priv->secfeed->set(priv->secfeed, priv->pid, 32768, 1);
1da177e4
LT		 987
988 if (ret<0) {
989 printk("%s: could not set section feed\n", dev->name);
990 priv->demux->release_section_feed(priv->demux, priv->secfeed);
991 priv->secfeed=NULL;
1130ca45 992 goto error;
1da177e4
LT		 993 }
994
995 if (priv->rx_mode != RX_MODE_PROMISC) {
996 dprintk("%s: set secfilter\n", __FUNCTION__);
997 dvb_net_filter_sec_set(dev, &priv->secfilter, mac, mask_normal);
998 }
999
1000 switch (priv->rx_mode) {
1001 case RX_MODE_MULTI:
1002 for (i = 0; i < priv->multi_num; i++) {
1003 dprintk("%s: set multi_secfilter[%d]\n", __FUNCTION__, i);
1004 dvb_net_filter_sec_set(dev, &priv->multi_secfilter[i],
1005 priv->multi_macs[i], mask_normal);
1006 }
1007 break;
1008 case RX_MODE_ALL_MULTI:
1009 priv->multi_num=1;
1010 dprintk("%s: set multi_secfilter[0]\n", __FUNCTION__);
1011 dvb_net_filter_sec_set(dev, &priv->multi_secfilter[0],
1012 mac_allmulti, mask_allmulti);
1013 break;
1014 case RX_MODE_PROMISC:
1015 priv->multi_num=0;
1016 dprintk("%s: set secfilter\n", __FUNCTION__);
1017 dvb_net_filter_sec_set(dev, &priv->secfilter, mac, mask_promisc);
1018 break;
1019 }
1020
1021 dprintk("%s: start filtering\n", __FUNCTION__);
1022 priv->secfeed->start_filtering(priv->secfeed);
1023 } else if (priv->feedtype == DVB_NET_FEEDTYPE_ULE) {
18232ca6 1024 struct timespec timeout = { 0, 10000000 }; // 10 msec
1da177e4
LT		 1025
1026 /* we have payloads encapsulated in TS */
1027 dprintk("%s: alloc tsfeed\n", __FUNCTION__);
1028 ret = demux->allocate_ts_feed(demux, &priv->tsfeed, dvb_net_ts_callback);
1029 if (ret < 0) {
1030 printk("%s: could not allocate ts feed\n", dev->name);
1130ca45 1031 goto error;
1da177e4
LT		 1032 }
1033
1034 /* Set netdevice pointer for ts decaps callback. */
1035 priv->tsfeed->priv = (void *)dev;
18232ca6
CP		 1036 ret = priv->tsfeed->set(priv->tsfeed,
1037 priv->pid, /* pid */
1038 TS_PACKET, /* type */
1039 DMX_TS_PES_OTHER, /* pes type */
1da177e4 1040 32768, /* circular buffer size */
18232ca6
CP		 1041 timeout /* timeout */
1042 );
1da177e4
LT		 1043
1044 if (ret < 0) {
1045 printk("%s: could not set ts feed\n", dev->name);
1046 priv->demux->release_ts_feed(priv->demux, priv->tsfeed);
1047 priv->tsfeed = NULL;
1130ca45 1048 goto error;
1da177e4
LT		 1049 }
1050
1051 dprintk("%s: start filtering\n", __FUNCTION__);
1052 priv->tsfeed->start_filtering(priv->tsfeed);
1053 } else
1130ca45 1054 ret = -EINVAL;
1da177e4 1055
1130ca45 1056error:
3593cab5 1057 mutex_unlock(&priv->mutex);
1130ca45 1058 return ret;
1da177e4
LT		 1059}
1060
1061static int dvb_net_feed_stop(struct net_device *dev)
1062{
0c53c70f 1063 struct dvb_net_priv *priv = dev->priv;
1130ca45 1064 int i, ret = 0;
1da177e4
LT		 1065
1066 dprintk("%s\n", __FUNCTION__);
3593cab5 1067 mutex_lock(&priv->mutex);
1da177e4
LT		 1068 if (priv->feedtype == DVB_NET_FEEDTYPE_MPE) {
1069 if (priv->secfeed) {
1070 if (priv->secfeed->is_filtering) {
1071 dprintk("%s: stop secfeed\n", __FUNCTION__);
1072 priv->secfeed->stop_filtering(priv->secfeed);
1073 }
1074
1075 if (priv->secfilter) {
1076 dprintk("%s: release secfilter\n", __FUNCTION__);
1077 priv->secfeed->release_filter(priv->secfeed,
1078 priv->secfilter);
1079 priv->secfilter=NULL;
1080 }
1081
1082 for (i=0; i<priv->multi_num; i++) {
1083 if (priv->multi_secfilter[i]) {
1084 dprintk("%s: release multi_filter[%d]\n",
1085 __FUNCTION__, i);
1086 priv->secfeed->release_filter(priv->secfeed,
1087 priv->multi_secfilter[i]);
1088 priv->multi_secfilter[i] = NULL;
1089 }
1090 }
1091
1092 priv->demux->release_section_feed(priv->demux, priv->secfeed);
1093 priv->secfeed = NULL;
1094 } else
1095 printk("%s: no feed to stop\n", dev->name);
1096 } else if (priv->feedtype == DVB_NET_FEEDTYPE_ULE) {
1097 if (priv->tsfeed) {
1098 if (priv->tsfeed->is_filtering) {
1099 dprintk("%s: stop tsfeed\n", __FUNCTION__);
1100 priv->tsfeed->stop_filtering(priv->tsfeed);
1101 }
1102 priv->demux->release_ts_feed(priv->demux, priv->tsfeed);
1103 priv->tsfeed = NULL;
1104 }
1105 else
1106 printk("%s: no ts feed to stop\n", dev->name);
1107 } else
1130ca45 1108 ret = -EINVAL;
3593cab5 1109 mutex_unlock(&priv->mutex);
1130ca45 1110 return ret;
1da177e4
LT		 1111}
1112
1113
1114static int dvb_set_mc_filter (struct net_device *dev, struct dev_mc_list *mc)
1115{
0c53c70f 1116 struct dvb_net_priv *priv = dev->priv;
1da177e4
LT		 1117
1118 if (priv->multi_num == DVB_NET_MULTICAST_MAX)
1119 return -ENOMEM;
1120
1121 memcpy(priv->multi_macs[priv->multi_num], mc->dmi_addr, 6);
1122
1123 priv->multi_num++;
1124 return 0;
1125}
1126
1127
c4028958 1128static void wq_set_multicast_list (struct work_struct *work)
1da177e4 1129{
c4028958
DH		 1130 struct dvb_net_priv *priv =
1131 container_of(work, struct dvb_net_priv, set_multicast_list_wq);
1132 struct net_device *dev = priv->net;
1da177e4
LT		 1133
1134 dvb_net_feed_stop(dev);
1da177e4 1135 priv->rx_mode = RX_MODE_UNI;
932ff279 1136 netif_tx_lock_bh(dev);
1da177e4
LT		 1137
1138 if (dev->flags & IFF_PROMISC) {
1139 dprintk("%s: promiscuous mode\n", dev->name);
1140 priv->rx_mode = RX_MODE_PROMISC;
1141 } else if ((dev->flags & IFF_ALLMULTI)) {
1142 dprintk("%s: allmulti mode\n", dev->name);
1143 priv->rx_mode = RX_MODE_ALL_MULTI;
1144 } else if (dev->mc_count) {
1145 int mci;
1146 struct dev_mc_list *mc;
1147
1148 dprintk("%s: set_mc_list, %d entries\n",
1149 dev->name, dev->mc_count);
1150
1151 priv->rx_mode = RX_MODE_MULTI;
1152 priv->multi_num = 0;
1153
1154 for (mci = 0, mc=dev->mc_list;
1155 mci < dev->mc_count;
1156 mc = mc->next, mci++) {
1157 dvb_set_mc_filter(dev, mc);
1158 }
1159 }
1160
932ff279 1161 netif_tx_unlock_bh(dev);
1da177e4
LT		 1162 dvb_net_feed_start(dev);
1163}
1164
1165
1166static void dvb_net_set_multicast_list (struct net_device *dev)
1167{
0c53c70f 1168 struct dvb_net_priv *priv = dev->priv;
1da177e4
LT		 1169 schedule_work(&priv->set_multicast_list_wq);
1170}
1171
1172
c4028958 1173static void wq_restart_net_feed (struct work_struct *work)
1da177e4 1174{
c4028958
DH		 1175 struct dvb_net_priv *priv =
1176 container_of(work, struct dvb_net_priv, restart_net_feed_wq);
1177 struct net_device *dev = priv->net;
1da177e4
LT		 1178
1179 if (netif_running(dev)) {
1180 dvb_net_feed_stop(dev);
1181 dvb_net_feed_start(dev);
1182 }
1183}
1184
1185
1186static int dvb_net_set_mac (struct net_device *dev, void *p)
1187{
0c53c70f 1188 struct dvb_net_priv *priv = dev->priv;
1da177e4
LT		 1189 struct sockaddr *addr=p;
1190
1191 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1192
1193 if (netif_running(dev))
1194 schedule_work(&priv->restart_net_feed_wq);
1195
1196 return 0;
1197}
1198
1199
1200static int dvb_net_open(struct net_device *dev)
1201{
0c53c70f 1202 struct dvb_net_priv *priv = dev->priv;
1da177e4
LT		 1203
1204 priv->in_use++;
1205 dvb_net_feed_start(dev);
1206 return 0;
1207}
1208
1209
1210static int dvb_net_stop(struct net_device *dev)
1211{
0c53c70f 1212 struct dvb_net_priv *priv = dev->priv;
1da177e4
LT		 1213
1214 priv->in_use--;
afd1a0c9 1215 return dvb_net_feed_stop(dev);
1da177e4
LT		 1216}
1217
1218static struct net_device_stats * dvb_net_get_stats(struct net_device *dev)
1219{
afd1a0c9 1220 return &((struct dvb_net_priv*) dev->priv)->stats;
1da177e4
LT		 1221}
1222
1223static void dvb_net_setup(struct net_device *dev)
1224{
1225 ether_setup(dev);
1226
1227 dev->open = dvb_net_open;
1228 dev->stop = dvb_net_stop;
1229 dev->hard_start_xmit = dvb_net_tx;
1230 dev->get_stats = dvb_net_get_stats;
1231 dev->set_multicast_list = dvb_net_set_multicast_list;
1232 dev->set_mac_address = dvb_net_set_mac;
1233 dev->mtu = 4096;
1234 dev->mc_count = 0;
1235 dev->hard_header_cache = NULL;
1236 dev->flags |= IFF_NOARP;
1237}
1238
1239static int get_if(struct dvb_net *dvbnet)
1240{
1241 int i;
1242
1243 for (i=0; i<DVB_NET_DEVICES_MAX; i++)
1244 if (!dvbnet->state[i])
1245 break;
1246
1247 if (i == DVB_NET_DEVICES_MAX)
1248 return -1;
1249
1250 dvbnet->state[i]=1;
1251 return i;
1252}
1253
1254static int dvb_net_add_if(struct dvb_net *dvbnet, u16 pid, u8 feedtype)
1255{
1256 struct net_device *net;
1257 struct dvb_net_priv *priv;
1258 int result;
1259 int if_num;
1260
1261 if (feedtype != DVB_NET_FEEDTYPE_MPE && feedtype != DVB_NET_FEEDTYPE_ULE)
1262 return -EINVAL;
1263 if ((if_num = get_if(dvbnet)) < 0)
1264 return -EINVAL;
1265
1266 net = alloc_netdev(sizeof(struct dvb_net_priv), "dvb", dvb_net_setup);
1267 if (!net)
1268 return -ENOMEM;
1269
1270 if (dvbnet->dvbdev->id)
1271 snprintf(net->name, IFNAMSIZ, "dvb%d%u%d",
1272 dvbnet->dvbdev->adapter->num, dvbnet->dvbdev->id, if_num);
1273 else
1274 /* compatibility fix to keep dvb0_0 format */
1275 snprintf(net->name, IFNAMSIZ, "dvb%d_%d",
1276 dvbnet->dvbdev->adapter->num, if_num);
1277
1278 net->addr_len = 6;
1279 memcpy(net->dev_addr, dvbnet->dvbdev->adapter->proposed_mac, 6);
1280
1281 dvbnet->device[if_num] = net;
1282
1283 priv = net->priv;
c4028958 1284 priv->net = net;
1da177e4
LT		 1285 priv->demux = dvbnet->demux;
1286 priv->pid = pid;
1287 priv->rx_mode = RX_MODE_UNI;
1288 priv->need_pusi = 1;
1289 priv->tscc = 0;
1290 priv->feedtype = feedtype;
1291 reset_ule(priv);
1292
c4028958
DH		 1293 INIT_WORK(&priv->set_multicast_list_wq, wq_set_multicast_list);
1294 INIT_WORK(&priv->restart_net_feed_wq, wq_restart_net_feed);
3593cab5 1295 mutex_init(&priv->mutex);
1da177e4
LT		 1296
1297 net->base_addr = pid;
1298
1299 if ((result = register_netdev(net)) < 0) {
1300 dvbnet->device[if_num] = NULL;
1301 free_netdev(net);
1302 return result;
1303 }
1304 printk("dvb_net: created network interface %s\n", net->name);
1305
1306 return if_num;
1307}
1308
400b7083 1309static int dvb_net_remove_if(struct dvb_net *dvbnet, unsigned long num)
1da177e4
LT		 1310{
1311 struct net_device *net = dvbnet->device[num];
1312 struct dvb_net_priv *priv;
1313
1314 if (!dvbnet->state[num])
1315 return -EINVAL;
1316 priv = net->priv;
1317 if (priv->in_use)
1318 return -EBUSY;
1319
1320 dvb_net_stop(net);
1321 flush_scheduled_work();
1322 printk("dvb_net: removed network interface %s\n", net->name);
1323 unregister_netdev(net);
1324 dvbnet->state[num]=0;
1325 dvbnet->device[num] = NULL;
1326 free_netdev(net);
1327
1328 return 0;
1329}
1330
1331static int dvb_net_do_ioctl(struct inode *inode, struct file *file,
1332 unsigned int cmd, void *parg)
1333{
0c53c70f
JS		 1334 struct dvb_device *dvbdev = file->private_data;
1335 struct dvb_net *dvbnet = dvbdev->priv;
1da177e4
LT		 1336
1337 if (((file->f_flags&O_ACCMODE)==O_RDONLY))
1338 return -EPERM;
1339
1340 switch (cmd) {
1341 case NET_ADD_IF:
1342 {
0c53c70f 1343 struct dvb_net_if *dvbnetif = parg;
1da177e4
LT		 1344 int result;
1345
1346 if (!capable(CAP_SYS_ADMIN))
1347 return -EPERM;
1348
1349 if (!try_module_get(dvbdev->adapter->module))
1350 return -EPERM;
1351
1352 result=dvb_net_add_if(dvbnet, dvbnetif->pid, dvbnetif->feedtype);
1353 if (result<0) {
1354 module_put(dvbdev->adapter->module);
1355 return result;
1356 }
1357 dvbnetif->if_num=result;
1358 break;
1359 }
1360 case NET_GET_IF:
1361 {
1362 struct net_device *netdev;
1363 struct dvb_net_priv *priv_data;
0c53c70f 1364 struct dvb_net_if *dvbnetif = parg;
1da177e4
LT		 1365
1366 if (dvbnetif->if_num >= DVB_NET_DEVICES_MAX ||
1367 !dvbnet->state[dvbnetif->if_num])
1368 return -EINVAL;
1369
1370 netdev = dvbnet->device[dvbnetif->if_num];
1371
0c53c70f 1372 priv_data = netdev->priv;
1da177e4
LT		 1373 dvbnetif->pid=priv_data->pid;
1374 dvbnetif->feedtype=priv_data->feedtype;
1375 break;
1376 }
1377 case NET_REMOVE_IF:
1378 {
1379 int ret;
1380
1381 if (!capable(CAP_SYS_ADMIN))
1382 return -EPERM;
e18828e4 1383 if ((unsigned long) parg >= DVB_NET_DEVICES_MAX)
1da177e4 1384 return -EINVAL;
e18828e4 1385 ret = dvb_net_remove_if(dvbnet, (unsigned long) parg);
1da177e4
LT		 1386 if (!ret)
1387 module_put(dvbdev->adapter->module);
1388 return ret;
1389 }
1390
1391 /* binary compatiblity cruft */
1392 case __NET_ADD_IF_OLD:
1393 {
0c53c70f 1394 struct __dvb_net_if_old *dvbnetif = parg;
1da177e4
LT		 1395 int result;
1396
1397 if (!capable(CAP_SYS_ADMIN))
1398 return -EPERM;
1399
1400 if (!try_module_get(dvbdev->adapter->module))
1401 return -EPERM;
1402
1403 result=dvb_net_add_if(dvbnet, dvbnetif->pid, DVB_NET_FEEDTYPE_MPE);
1404 if (result<0) {
1405 module_put(dvbdev->adapter->module);
1406 return result;
1407 }
1408 dvbnetif->if_num=result;
1409 break;
1410 }
1411 case __NET_GET_IF_OLD:
1412 {
1413 struct net_device *netdev;
1414 struct dvb_net_priv *priv_data;
0c53c70f 1415 struct __dvb_net_if_old *dvbnetif = parg;
1da177e4
LT		 1416
1417 if (dvbnetif->if_num >= DVB_NET_DEVICES_MAX ||
1418 !dvbnet->state[dvbnetif->if_num])
1419 return -EINVAL;
1420
1421 netdev = dvbnet->device[dvbnetif->if_num];
1422
0c53c70f 1423 priv_data = netdev->priv;
1da177e4
LT		 1424 dvbnetif->pid=priv_data->pid;
1425 break;
1426 }
1427 default:
1428 return -ENOTTY;
1429 }
1430 return 0;
1431}
1432
1433static int dvb_net_ioctl(struct inode *inode, struct file *file,
1434 unsigned int cmd, unsigned long arg)
1435{
1436 return dvb_usercopy(inode, file, cmd, arg, dvb_net_do_ioctl);
1437}
1438
2c4d3364
MR		 1439static int dvb_net_close(struct inode *inode, struct file *file)
1440{
1441 struct dvb_device *dvbdev = file->private_data;
1442 struct dvb_net *dvbnet = dvbdev->priv;
1443
1444 if (!dvbdev)
1445 return -ENODEV;
1446
1447 if ((file->f_flags & O_ACCMODE) == O_RDONLY) {
1448 dvbdev->readers++;
1449 } else {
1450 dvbdev->writers++;
1451 }
1452
1453 dvbdev->users++;
1454
1455 if(dvbdev->users == 1 && dvbnet->exit==1) {
1456 fops_put(file->f_op);
1457 file->f_op = NULL;
1458 wake_up(&dvbdev->wait_queue);
1459 }
1460 return 0;
1461}
1462
1463
1da177e4
LT		 1464static struct file_operations dvb_net_fops = {
1465 .owner = THIS_MODULE,
1466 .ioctl = dvb_net_ioctl,
1467 .open = dvb_generic_open,
2c4d3364 1468 .release = dvb_net_close,
1da177e4
LT		 1469};
1470
1471static struct dvb_device dvbdev_net = {
afd1a0c9
MCC		 1472 .priv = NULL,
1473 .users = 1,
1474 .writers = 1,
1475 .fops = &dvb_net_fops,
1da177e4
LT		 1476};
1477
1478
1479void dvb_net_release (struct dvb_net *dvbnet)
1480{
1481 int i;
1482
2c4d3364
MR		 1483 dvbnet->exit = 1;
1484 if (dvbnet->dvbdev->users < 1)
1485 wait_event(dvbnet->dvbdev->wait_queue,
1486 dvbnet->dvbdev->users==1);
1487
1da177e4
LT		 1488 dvb_unregister_device(dvbnet->dvbdev);
1489
1490 for (i=0; i<DVB_NET_DEVICES_MAX; i++) {
1491 if (!dvbnet->state[i])
1492 continue;
1493 dvb_net_remove_if(dvbnet, i);
1494 }
1495}
1496EXPORT_SYMBOL(dvb_net_release);
1497
1498
1499int dvb_net_init (struct dvb_adapter *adap, struct dvb_net *dvbnet,
1500 struct dmx_demux *dmx)
1501{
1502 int i;
1503
1504 dvbnet->demux = dmx;
1505
1506 for (i=0; i<DVB_NET_DEVICES_MAX; i++)
1507 dvbnet->state[i] = 0;
1508
1509 dvb_register_device (adap, &dvbnet->dvbdev, &dvbdev_net,
1510 dvbnet, DVB_DEVICE_NET);
1511
1512 return 0;
1513}
1514EXPORT_SYMBOL(dvb_net_init);
Linux kernel - Deliverables
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