441c0642b30a11b7cd443125a97c490b2ba31d9b
[linux-2.6.git] / drivers / media / dvb / dvb-core / dvb_net.c
1 /*
2  * dvb_net.c
3  *
4  * Copyright (C) 2001 Convergence integrated media GmbH
5  *                    Ralph Metzler <ralph@convergence.de>
6  * Copyright (C) 2002 Ralph Metzler <rjkm@metzlerbros.de>
7  *
8  * ULE Decapsulation code:
9  * Copyright (C) 2003, 2004 gcs - Global Communication & Services GmbH.
10  *                      and Department of Scientific Computing
11  *                          Paris Lodron University of Salzburg.
12  *                          Hilmar Linder <hlinder@cosy.sbg.ac.at>
13  *                      and Wolfram Stering <wstering@cosy.sbg.ac.at>
14  *
15  * ULE Decaps according to RFC 4326.
16  *
17  * This program is free software; you can redistribute it and/or
18  * modify it under the terms of the GNU General Public License
19  * as published by the Free Software Foundation; either version 2
20  * of the License, or (at your option) any later version.
21  *
22  * This program is distributed in the hope that it will be useful,
23  * but WITHOUT ANY WARRANTY; without even the implied warranty of
24  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
25  * GNU General Public License for more details.
26  *
27  * You should have received a copy of the GNU General Public License
28  * along with this program; if not, write to the Free Software
29  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
30  * Or, point your browser to http://www.gnu.org/copyleft/gpl.html
31  */
32
33 /*
34  * ULE ChangeLog:
35  * Feb 2004: hl/ws v1: Implementing draft-fair-ipdvb-ule-01.txt
36  *
37  * Dec 2004: hl/ws v2: Implementing draft-ietf-ipdvb-ule-03.txt:
38  *                       ULE Extension header handling.
39  *                     Bugreports by Moritz Vieth and Hanno Tersteegen,
40  *                       Fraunhofer Institute for Open Communication Systems
41  *                       Competence Center for Advanced Satellite Communications.
42  *                     Bugfixes and robustness improvements.
43  *                     Filtering on dest MAC addresses, if present (D-Bit = 0)
44  *                     ULE_DEBUG compile-time option.
45  * Apr 2006: cp v3:    Bugfixes and compliency with RFC 4326 (ULE) by
46  *                       Christian Praehauser <cpraehaus@cosy.sbg.ac.at>,
47  *                       Paris Lodron University of Salzburg.
48  */
49
50 /*
51  * FIXME / TODO (dvb_net.c):
52  *
53  * Unloading does not work for 2.6.9 kernels: a refcount doesn't go to zero.
54  *
55  */
56
57 #include <linux/module.h>
58 #include <linux/kernel.h>
59 #include <linux/netdevice.h>
60 #include <linux/etherdevice.h>
61 #include <linux/dvb/net.h>
62 #include <linux/uio.h>
63 #include <asm/uaccess.h>
64 #include <linux/crc32.h>
65 #include <linux/mutex.h>
66 #include <linux/sched.h>
67
68 #include "dvb_demux.h"
69 #include "dvb_net.h"
70
71 static int dvb_net_debug;
72 module_param(dvb_net_debug, int, 0444);
73 MODULE_PARM_DESC(dvb_net_debug, "enable debug messages");
74
75 #define dprintk(x...) do { if (dvb_net_debug) printk(x); } while (0)
76
77
78 static inline __u32 iov_crc32( __u32 c, struct kvec *iov, unsigned int cnt )
79 {
80         unsigned int j;
81         for (j = 0; j < cnt; j++)
82                 c = crc32_be( c, iov[j].iov_base, iov[j].iov_len );
83         return c;
84 }
85
86
87 #define DVB_NET_MULTICAST_MAX 10
88
89 #undef ULE_DEBUG
90
91 #ifdef ULE_DEBUG
92
93 #define MAC_ADDR_PRINTFMT "%.2x:%.2x:%.2x:%.2x:%.2x:%.2x"
94 #define MAX_ADDR_PRINTFMT_ARGS(macap) (macap)[0],(macap)[1],(macap)[2],(macap)[3],(macap)[4],(macap)[5]
95
96 #define isprint(c)      ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || (c >= '0' && c <= '9'))
97
98 static void hexdump( const unsigned char *buf, unsigned short len )
99 {
100         char str[80], octet[10];
101         int ofs, i, l;
102
103         for (ofs = 0; ofs < len; ofs += 16) {
104                 sprintf( str, "%03d: ", ofs );
105
106                 for (i = 0; i < 16; i++) {
107                         if ((i + ofs) < len)
108                                 sprintf( octet, "%02x ", buf[ofs + i] );
109                         else
110                                 strcpy( octet, "   " );
111
112                         strcat( str, octet );
113                 }
114                 strcat( str, "  " );
115                 l = strlen( str );
116
117                 for (i = 0; (i < 16) && ((i + ofs) < len); i++)
118                         str[l++] = isprint( buf[ofs + i] ) ? buf[ofs + i] : '.';
119
120                 str[l] = '\0';
121                 printk( KERN_WARNING "%s\n", str );
122         }
123 }
124
125 #endif
126
127 struct dvb_net_priv {
128         int in_use;
129         u16 pid;
130         struct net_device *net;
131         struct dvb_net *host;
132         struct dmx_demux *demux;
133         struct dmx_section_feed *secfeed;
134         struct dmx_section_filter *secfilter;
135         struct dmx_ts_feed *tsfeed;
136         int multi_num;
137         struct dmx_section_filter *multi_secfilter[DVB_NET_MULTICAST_MAX];
138         unsigned char multi_macs[DVB_NET_MULTICAST_MAX][6];
139         int rx_mode;
140 #define RX_MODE_UNI 0
141 #define RX_MODE_MULTI 1
142 #define RX_MODE_ALL_MULTI 2
143 #define RX_MODE_PROMISC 3
144         struct work_struct set_multicast_list_wq;
145         struct work_struct restart_net_feed_wq;
146         unsigned char feedtype;                 /* Either FEED_TYPE_ or FEED_TYPE_ULE */
147         int need_pusi;                          /* Set to 1, if synchronization on PUSI required. */
148         unsigned char tscc;                     /* TS continuity counter after sync on PUSI. */
149         struct sk_buff *ule_skb;                /* ULE SNDU decodes into this buffer. */
150         unsigned char *ule_next_hdr;            /* Pointer into skb to next ULE extension header. */
151         unsigned short ule_sndu_len;            /* ULE SNDU length in bytes, w/o D-Bit. */
152         unsigned short ule_sndu_type;           /* ULE SNDU type field, complete. */
153         unsigned char ule_sndu_type_1;          /* ULE SNDU type field, if split across 2 TS cells. */
154         unsigned char ule_dbit;                 /* Whether the DestMAC address present
155                                                  * or not (bit is set). */
156         unsigned char ule_bridged;              /* Whether the ULE_BRIDGED extension header was found. */
157         int ule_sndu_remain;                    /* Nr. of bytes still required for current ULE SNDU. */
158         unsigned long ts_count;                 /* Current ts cell counter. */
159         struct mutex mutex;
160 };
161
162
163 /**
164  *      Determine the packet's protocol ID. The rule here is that we
165  *      assume 802.3 if the type field is short enough to be a length.
166  *      This is normal practice and works for any 'now in use' protocol.
167  *
168  *  stolen from eth.c out of the linux kernel, hacked for dvb-device
169  *  by Michael Holzt <kju@debian.org>
170  */
171 static __be16 dvb_net_eth_type_trans(struct sk_buff *skb,
172                                       struct net_device *dev)
173 {
174         struct ethhdr *eth;
175         unsigned char *rawp;
176
177         skb_reset_mac_header(skb);
178         skb_pull(skb,dev->hard_header_len);
179         eth = eth_hdr(skb);
180
181         if (*eth->h_dest & 1) {
182                 if(memcmp(eth->h_dest,dev->broadcast, ETH_ALEN)==0)
183                         skb->pkt_type=PACKET_BROADCAST;
184                 else
185                         skb->pkt_type=PACKET_MULTICAST;
186         }
187
188         if (ntohs(eth->h_proto) >= 1536)
189                 return eth->h_proto;
190
191         rawp = skb->data;
192
193         /**
194          *      This is a magic hack to spot IPX packets. Older Novell breaks
195          *      the protocol design and runs IPX over 802.3 without an 802.2 LLC
196          *      layer. We look for FFFF which isn't a used 802.2 SSAP/DSAP. This
197          *      won't work for fault tolerant netware but does for the rest.
198          */
199         if (*(unsigned short *)rawp == 0xFFFF)
200                 return htons(ETH_P_802_3);
201
202         /**
203          *      Real 802.2 LLC
204          */
205         return htons(ETH_P_802_2);
206 }
207
208 #define TS_SZ   188
209 #define TS_SYNC 0x47
210 #define TS_TEI  0x80
211 #define TS_SC   0xC0
212 #define TS_PUSI 0x40
213 #define TS_AF_A 0x20
214 #define TS_AF_D 0x10
215
216 /* ULE Extension Header handlers. */
217
218 #define ULE_TEST        0
219 #define ULE_BRIDGED     1
220
221 #define ULE_OPTEXTHDR_PADDING 0
222
223 static int ule_test_sndu( struct dvb_net_priv *p )
224 {
225         return -1;
226 }
227
228 static int ule_bridged_sndu( struct dvb_net_priv *p )
229 {
230         struct ethhdr *hdr = (struct ethhdr*) p->ule_next_hdr;
231         if(ntohs(hdr->h_proto) < 1536) {
232                 int framelen = p->ule_sndu_len - ((p->ule_next_hdr+sizeof(struct ethhdr)) - p->ule_skb->data);
233                 /* A frame Type < 1536 for a bridged frame, introduces a LLC Length field. */
234                 if(framelen != ntohs(hdr->h_proto)) {
235                         return -1;
236                 }
237         }
238         /* Note:
239          * From RFC4326:
240          *  "A bridged SNDU is a Mandatory Extension Header of Type 1.
241          *   It must be the final (or only) extension header specified in the header chain of a SNDU."
242          * The 'ule_bridged' flag will cause the extension header processing loop to terminate.
243          */
244         p->ule_bridged = 1;
245         return 0;
246 }
247
248 static int ule_exthdr_padding(struct dvb_net_priv *p)
249 {
250         return 0;
251 }
252
253 /** Handle ULE extension headers.
254  *  Function is called after a successful CRC32 verification of an ULE SNDU to complete its decoding.
255  *  Returns: >= 0: nr. of bytes consumed by next extension header
256  *           -1:   Mandatory extension header that is not recognized or TEST SNDU; discard.
257  */
258 static int handle_one_ule_extension( struct dvb_net_priv *p )
259 {
260         /* Table of mandatory extension header handlers.  The header type is the index. */
261         static int (*ule_mandatory_ext_handlers[255])( struct dvb_net_priv *p ) =
262                 { [0] = ule_test_sndu, [1] = ule_bridged_sndu, [2] = NULL,  };
263
264         /* Table of optional extension header handlers.  The header type is the index. */
265         static int (*ule_optional_ext_handlers[255])( struct dvb_net_priv *p ) =
266                 { [0] = ule_exthdr_padding, [1] = NULL, };
267
268         int ext_len = 0;
269         unsigned char hlen = (p->ule_sndu_type & 0x0700) >> 8;
270         unsigned char htype = p->ule_sndu_type & 0x00FF;
271
272         /* Discriminate mandatory and optional extension headers. */
273         if (hlen == 0) {
274                 /* Mandatory extension header */
275                 if (ule_mandatory_ext_handlers[htype]) {
276                         ext_len = ule_mandatory_ext_handlers[htype]( p );
277                         if(ext_len >= 0) {
278                                 p->ule_next_hdr += ext_len;
279                                 if (!p->ule_bridged) {
280                                         p->ule_sndu_type = ntohs(*(__be16 *)p->ule_next_hdr);
281                                         p->ule_next_hdr += 2;
282                                 } else {
283                                         p->ule_sndu_type = ntohs(*(__be16 *)(p->ule_next_hdr + ((p->ule_dbit ? 2 : 3) * ETH_ALEN)));
284                                         /* This assures the extension handling loop will terminate. */
285                                 }
286                         }
287                         // else: extension handler failed or SNDU should be discarded
288                 } else
289                         ext_len = -1;   /* SNDU has to be discarded. */
290         } else {
291                 /* Optional extension header.  Calculate the length. */
292                 ext_len = hlen << 1;
293                 /* Process the optional extension header according to its type. */
294                 if (ule_optional_ext_handlers[htype])
295                         (void)ule_optional_ext_handlers[htype]( p );
296                 p->ule_next_hdr += ext_len;
297                 p->ule_sndu_type = ntohs( *(__be16 *)(p->ule_next_hdr-2) );
298                 /*
299                  * note: the length of the next header type is included in the
300                  * length of THIS optional extension header
301                  */
302         }
303
304         return ext_len;
305 }
306
307 static int handle_ule_extensions( struct dvb_net_priv *p )
308 {
309         int total_ext_len = 0, l;
310
311         p->ule_next_hdr = p->ule_skb->data;
312         do {
313                 l = handle_one_ule_extension( p );
314                 if (l < 0)
315                         return l;       /* Stop extension header processing and discard SNDU. */
316                 total_ext_len += l;
317 #ifdef ULE_DEBUG
318                 dprintk("handle_ule_extensions: ule_next_hdr=%p, ule_sndu_type=%i, "
319                         "l=%i, total_ext_len=%i\n", p->ule_next_hdr,
320                         (int) p->ule_sndu_type, l, total_ext_len);
321 #endif
322
323         } while (p->ule_sndu_type < 1536);
324
325         return total_ext_len;
326 }
327
328
329 /** Prepare for a new ULE SNDU: reset the decoder state. */
330 static inline void reset_ule( struct dvb_net_priv *p )
331 {
332         p->ule_skb = NULL;
333         p->ule_next_hdr = NULL;
334         p->ule_sndu_len = 0;
335         p->ule_sndu_type = 0;
336         p->ule_sndu_type_1 = 0;
337         p->ule_sndu_remain = 0;
338         p->ule_dbit = 0xFF;
339         p->ule_bridged = 0;
340 }
341
342 /**
343  * Decode ULE SNDUs according to draft-ietf-ipdvb-ule-03.txt from a sequence of
344  * TS cells of a single PID.
345  */
346 static void dvb_net_ule( struct net_device *dev, const u8 *buf, size_t buf_len )
347 {
348         struct dvb_net_priv *priv = netdev_priv(dev);
349         unsigned long skipped = 0L;
350         const u8 *ts, *ts_end, *from_where = NULL;
351         u8 ts_remain = 0, how_much = 0, new_ts = 1;
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;
358 #endif
359
360         /* For all TS cells in current buffer.
361          * Appearently, we are called for every single TS cell.
362          */
363         for (ts = buf, ts_end = buf + buf_len; ts < ts_end; /* no default incr. */ ) {
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. */
387                                         dev->stats.rx_errors++;
388                                         dev->stats.rx_frame_errors++;
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
428                 if (new_ts) {
429                         /* Check continuity counter. */
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, "
435                                        "expected %#x.\n", priv->ts_count, ts[3] & 0x0F, priv->tscc);
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.
441                                         dev->stats.rx_errors++;
442                                         dev->stats.rx_frame_errors++;
443                                 }
444                                 reset_ule(priv);
445                                 /* skip to next PUSI. */
446                                 priv->need_pusi = 1;
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) {
455                                         if (!(*from_where < (ts_remain-1)) || *from_where != priv->ule_sndu_remain) {
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                                                         dev->stats.rx_errors++;
464                                                         dev->stats.rx_frame_errors++;
465                                                 }
466                                                 reset_ule(priv);
467                                                 priv->need_pusi = 1;
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. */
480                                         dev->stats.rx_errors++;
481                                         dev->stats.rx_length_errors++;
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                                 ts += TS_SZ;
508                                 continue;
509                         }
510
511                         if (! priv->ule_sndu_len) {
512                                 /* Got at least two bytes, thus extrace the SNDU length. */
513                                 priv->ule_sndu_len = from_where[0] << 8 | from_where[1];
514                                 if (priv->ule_sndu_len & 0x8000) {
515                                         /* D-Bit is set: no dest mac present. */
516                                         priv->ule_sndu_len &= 0x7FFF;
517                                         priv->ule_dbit = 1;
518                                 } else
519                                         priv->ule_dbit = 0;
520
521                                 if (priv->ule_sndu_len < 5) {
522                                         printk(KERN_WARNING "%lu: Invalid ULE SNDU length %u. "
523                                                "Resyncing.\n", priv->ts_count, priv->ule_sndu_len);
524                                         dev->stats.rx_errors++;
525                                         dev->stats.rx_length_errors++;
526                                         priv->ule_sndu_len = 0;
527                                         priv->need_pusi = 1;
528                                         new_ts = 1;
529                                         ts += TS_SZ;
530                                         priv->ts_count++;
531                                         continue;
532                                 }
533                                 ts_remain -= 2; /* consume the 2 bytes SNDU length. */
534                                 from_where += 2;
535                         }
536
537                         /*
538                          * State of current TS:
539                          *   ts_remain (remaining bytes in the current TS cell)
540                          *   0  ule_type is not available now, we need the next TS cell
541                          *   1  the first byte of the ule_type is present
542                          * >=2  full ULE header present, maybe some payload data as well.
543                          */
544                         switch (ts_remain) {
545                                 case 1:
546                                         priv->ule_sndu_type = from_where[0] << 8;
547                                         priv->ule_sndu_type_1 = 1; /* first byte of ule_type is set. */
548                                         ts_remain -= 1; from_where += 1;
549                                         /* Continue w/ next TS. */
550                                 case 0:
551                                         new_ts = 1;
552                                         ts += TS_SZ;
553                                         priv->ts_count++;
554                                         continue;
555
556                                 default: /* complete ULE header is present in current TS. */
557                                         /* Extract ULE type field. */
558                                         if (priv->ule_sndu_type_1) {
559                                                 priv->ule_sndu_type |= from_where[0];
560                                                 from_where += 1; /* points to payload start. */
561                                                 ts_remain -= 1;
562                                         } else {
563                                                 /* Complete type is present in new TS. */
564                                                 priv->ule_sndu_type = from_where[0] << 8 | from_where[1];
565                                                 from_where += 2; /* points to payload start. */
566                                                 ts_remain -= 2;
567                                         }
568                                         break;
569                         }
570
571                         /* Allocate the skb (decoder target buffer) with the correct size, as follows:
572                          * prepare for the largest case: bridged SNDU with MAC address (dbit = 0). */
573                         priv->ule_skb = dev_alloc_skb( priv->ule_sndu_len + ETH_HLEN + ETH_ALEN );
574                         if (priv->ule_skb == NULL) {
575                                 printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n",
576                                        dev->name);
577                                 dev->stats.rx_dropped++;
578                                 return;
579                         }
580
581                         /* This includes the CRC32 _and_ dest mac, if !dbit. */
582                         priv->ule_sndu_remain = priv->ule_sndu_len;
583                         priv->ule_skb->dev = dev;
584                         /* Leave space for Ethernet or bridged SNDU header (eth hdr plus one MAC addr). */
585                         skb_reserve( priv->ule_skb, ETH_HLEN + ETH_ALEN );
586                 }
587
588                 /* Copy data into our current skb. */
589                 how_much = min(priv->ule_sndu_remain, (int)ts_remain);
590                 memcpy(skb_put(priv->ule_skb, how_much), from_where, how_much);
591                 priv->ule_sndu_remain -= how_much;
592                 ts_remain -= how_much;
593                 from_where += how_much;
594
595                 /* Check for complete payload. */
596                 if (priv->ule_sndu_remain <= 0) {
597                         /* Check CRC32, we've got it in our skb already. */
598                         __be16 ulen = htons(priv->ule_sndu_len);
599                         __be16 utype = htons(priv->ule_sndu_type);
600                         const u8 *tail;
601                         struct kvec iov[3] = {
602                                 { &ulen, sizeof ulen },
603                                 { &utype, sizeof utype },
604                                 { priv->ule_skb->data, priv->ule_skb->len - 4 }
605                         };
606                         u32 ule_crc = ~0L, expected_crc;
607                         if (priv->ule_dbit) {
608                                 /* Set D-bit for CRC32 verification,
609                                  * if it was set originally. */
610                                 ulen |= htons(0x8000);
611                         }
612
613                         ule_crc = iov_crc32(ule_crc, iov, 3);
614                         tail = skb_tail_pointer(priv->ule_skb);
615                         expected_crc = *(tail - 4) << 24 |
616                                        *(tail - 3) << 16 |
617                                        *(tail - 2) << 8 |
618                                        *(tail - 1);
619                         if (ule_crc != expected_crc) {
620                                 printk(KERN_WARNING "%lu: CRC32 check FAILED: %08x / %08x, SNDU len %d type %#x, ts_remain %d, next 2: %x.\n",
621                                        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);
622
623 #ifdef ULE_DEBUG
624                                 hexdump( iov[0].iov_base, iov[0].iov_len );
625                                 hexdump( iov[1].iov_base, iov[1].iov_len );
626                                 hexdump( iov[2].iov_base, iov[2].iov_len );
627
628                                 if (ule_where == ule_hist) {
629                                         hexdump( &ule_hist[98*TS_SZ], TS_SZ );
630                                         hexdump( &ule_hist[99*TS_SZ], TS_SZ );
631                                 } else if (ule_where == &ule_hist[TS_SZ]) {
632                                         hexdump( &ule_hist[99*TS_SZ], TS_SZ );
633                                         hexdump( ule_hist, TS_SZ );
634                                 } else {
635                                         hexdump( ule_where - TS_SZ - TS_SZ, TS_SZ );
636                                         hexdump( ule_where - TS_SZ, TS_SZ );
637                                 }
638                                 ule_dump = 1;
639 #endif
640
641                                 dev->stats.rx_errors++;
642                                 dev->stats.rx_crc_errors++;
643                                 dev_kfree_skb(priv->ule_skb);
644                         } else {
645                                 /* CRC32 verified OK. */
646                                 u8 dest_addr[ETH_ALEN];
647                                 static const u8 bc_addr[ETH_ALEN] =
648                                         { [ 0 ... ETH_ALEN-1] = 0xff };
649
650                                 /* CRC32 was OK. Remove it from skb. */
651                                 priv->ule_skb->tail -= 4;
652                                 priv->ule_skb->len -= 4;
653
654                                 if (!priv->ule_dbit) {
655                                         /*
656                                          * The destination MAC address is the
657                                          * next data in the skb.  It comes
658                                          * before any extension headers.
659                                          *
660                                          * Check if the payload of this SNDU
661                                          * should be passed up the stack.
662                                          */
663                                         register int drop = 0;
664                                         if (priv->rx_mode != RX_MODE_PROMISC) {
665                                                 if (priv->ule_skb->data[0] & 0x01) {
666                                                         /* multicast or broadcast */
667                                                         if (memcmp(priv->ule_skb->data, bc_addr, ETH_ALEN)) {
668                                                                 /* multicast */
669                                                                 if (priv->rx_mode == RX_MODE_MULTI) {
670                                                                         int i;
671                                                                         for(i = 0; i < priv->multi_num && memcmp(priv->ule_skb->data, priv->multi_macs[i], ETH_ALEN); i++)
672                                                                                 ;
673                                                                         if (i == priv->multi_num)
674                                                                                 drop = 1;
675                                                                 } else if (priv->rx_mode != RX_MODE_ALL_MULTI)
676                                                                         drop = 1; /* no broadcast; */
677                                                                 /* else: all multicast mode: accept all multicast packets */
678                                                         }
679                                                         /* else: broadcast */
680                                                 }
681                                                 else if (memcmp(priv->ule_skb->data, dev->dev_addr, ETH_ALEN))
682                                                         drop = 1;
683                                                 /* else: destination address matches the MAC address of our receiver device */
684                                         }
685                                         /* else: promiscuous mode; pass everything up the stack */
686
687                                         if (drop) {
688 #ifdef ULE_DEBUG
689                                                 dprintk("Dropping SNDU: MAC destination address does not match: dest addr: "MAC_ADDR_PRINTFMT", dev addr: "MAC_ADDR_PRINTFMT"\n",
690                                                         MAX_ADDR_PRINTFMT_ARGS(priv->ule_skb->data), MAX_ADDR_PRINTFMT_ARGS(dev->dev_addr));
691 #endif
692                                                 dev_kfree_skb(priv->ule_skb);
693                                                 goto sndu_done;
694                                         }
695                                         else
696                                         {
697                                                 skb_copy_from_linear_data(priv->ule_skb,
698                                                               dest_addr,
699                                                               ETH_ALEN);
700                                                 skb_pull(priv->ule_skb, ETH_ALEN);
701                                         }
702                                 }
703
704                                 /* Handle ULE Extension Headers. */
705                                 if (priv->ule_sndu_type < 1536) {
706                                         /* There is an extension header.  Handle it accordingly. */
707                                         int l = handle_ule_extensions(priv);
708                                         if (l < 0) {
709                                                 /* Mandatory extension header unknown or TEST SNDU.  Drop it. */
710                                                 // printk( KERN_WARNING "Dropping SNDU, extension headers.\n" );
711                                                 dev_kfree_skb(priv->ule_skb);
712                                                 goto sndu_done;
713                                         }
714                                         skb_pull(priv->ule_skb, l);
715                                 }
716
717                                 /*
718                                  * Construct/assure correct ethernet header.
719                                  * Note: in bridged mode (priv->ule_bridged !=
720                                  * 0) we already have the (original) ethernet
721                                  * header at the start of the payload (after
722                                  * optional dest. address and any extension
723                                  * headers).
724                                  */
725
726                                 if (!priv->ule_bridged) {
727                                         skb_push(priv->ule_skb, ETH_HLEN);
728                                         ethh = (struct ethhdr *)priv->ule_skb->data;
729                                         if (!priv->ule_dbit) {
730                                                  /* dest_addr buffer is only valid if priv->ule_dbit == 0 */
731                                                 memcpy(ethh->h_dest, dest_addr, ETH_ALEN);
732                                                 memset(ethh->h_source, 0, ETH_ALEN);
733                                         }
734                                         else /* zeroize source and dest */
735                                                 memset( ethh, 0, ETH_ALEN*2 );
736
737                                         ethh->h_proto = htons(priv->ule_sndu_type);
738                                 }
739                                 /* else:  skb is in correct state; nothing to do. */
740                                 priv->ule_bridged = 0;
741
742                                 /* Stuff into kernel's protocol stack. */
743                                 priv->ule_skb->protocol = dvb_net_eth_type_trans(priv->ule_skb, dev);
744                                 /* If D-bit is set (i.e. destination MAC address not present),
745                                  * receive the packet anyhow. */
746                                 /* if (priv->ule_dbit && skb->pkt_type == PACKET_OTHERHOST)
747                                         priv->ule_skb->pkt_type = PACKET_HOST; */
748                                 dev->stats.rx_packets++;
749                                 dev->stats.rx_bytes += priv->ule_skb->len;
750                                 netif_rx(priv->ule_skb);
751                         }
752                         sndu_done:
753                         /* Prepare for next SNDU. */
754                         reset_ule(priv);
755                 }
756
757                 /* More data in current TS (look at the bytes following the CRC32)? */
758                 if (ts_remain >= 2 && *((unsigned short *)from_where) != 0xFFFF) {
759                         /* Next ULE SNDU starts right there. */
760                         new_ts = 0;
761                         priv->ule_skb = NULL;
762                         priv->ule_sndu_type_1 = 0;
763                         priv->ule_sndu_len = 0;
764                         // printk(KERN_WARNING "More data in current TS: [%#x %#x %#x %#x]\n",
765                         //      *(from_where + 0), *(from_where + 1),
766                         //      *(from_where + 2), *(from_where + 3));
767                         // printk(KERN_WARNING "ts @ %p, stopped @ %p:\n", ts, from_where + 0);
768                         // hexdump(ts, 188);
769                 } else {
770                         new_ts = 1;
771                         ts += TS_SZ;
772                         priv->ts_count++;
773                         if (priv->ule_skb == NULL) {
774                                 priv->need_pusi = 1;
775                                 priv->ule_sndu_type_1 = 0;
776                                 priv->ule_sndu_len = 0;
777                         }
778                 }
779         }       /* for all available TS cells */
780 }
781
782 static int dvb_net_ts_callback(const u8 *buffer1, size_t buffer1_len,
783                                const u8 *buffer2, size_t buffer2_len,
784                                struct dmx_ts_feed *feed, enum dmx_success success)
785 {
786         struct net_device *dev = feed->priv;
787
788         if (buffer2)
789                 printk(KERN_WARNING "buffer2 not NULL: %p.\n", buffer2);
790         if (buffer1_len > 32768)
791                 printk(KERN_WARNING "length > 32k: %zu.\n", buffer1_len);
792         /* printk("TS callback: %u bytes, %u TS cells @ %p.\n",
793                   buffer1_len, buffer1_len / TS_SZ, buffer1); */
794         dvb_net_ule(dev, buffer1, buffer1_len);
795         return 0;
796 }
797
798
799 static void dvb_net_sec(struct net_device *dev,
800                         const u8 *pkt, int pkt_len)
801 {
802         u8 *eth;
803         struct sk_buff *skb;
804         struct net_device_stats *stats = &dev->stats;
805         int snap = 0;
806
807         /* note: pkt_len includes a 32bit checksum */
808         if (pkt_len < 16) {
809                 printk("%s: IP/MPE packet length = %d too small.\n",
810                         dev->name, pkt_len);
811                 stats->rx_errors++;
812                 stats->rx_length_errors++;
813                 return;
814         }
815 /* it seems some ISPs manage to screw up here, so we have to
816  * relax the error checks... */
817 #if 0
818         if ((pkt[5] & 0xfd) != 0xc1) {
819                 /* drop scrambled or broken packets */
820 #else
821         if ((pkt[5] & 0x3c) != 0x00) {
822                 /* drop scrambled */
823 #endif
824                 stats->rx_errors++;
825                 stats->rx_crc_errors++;
826                 return;
827         }
828         if (pkt[5] & 0x02) {
829                 /* handle LLC/SNAP, see rfc-1042 */
830                 if (pkt_len < 24 || memcmp(&pkt[12], "\xaa\xaa\x03\0\0\0", 6)) {
831                         stats->rx_dropped++;
832                         return;
833                 }
834                 snap = 8;
835         }
836         if (pkt[7]) {
837                 /* FIXME: assemble datagram from multiple sections */
838                 stats->rx_errors++;
839                 stats->rx_frame_errors++;
840                 return;
841         }
842
843         /* we have 14 byte ethernet header (ip header follows);
844          * 12 byte MPE header; 4 byte checksum; + 2 byte alignment, 8 byte LLC/SNAP
845          */
846         if (!(skb = dev_alloc_skb(pkt_len - 4 - 12 + 14 + 2 - snap))) {
847                 //printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n", dev->name);
848                 stats->rx_dropped++;
849                 return;
850         }
851         skb_reserve(skb, 2);    /* longword align L3 header */
852         skb->dev = dev;
853
854         /* copy L3 payload */
855         eth = (u8 *) skb_put(skb, pkt_len - 12 - 4 + 14 - snap);
856         memcpy(eth + 14, pkt + 12 + snap, pkt_len - 12 - 4 - snap);
857
858         /* create ethernet header: */
859         eth[0]=pkt[0x0b];
860         eth[1]=pkt[0x0a];
861         eth[2]=pkt[0x09];
862         eth[3]=pkt[0x08];
863         eth[4]=pkt[0x04];
864         eth[5]=pkt[0x03];
865
866         eth[6]=eth[7]=eth[8]=eth[9]=eth[10]=eth[11]=0;
867
868         if (snap) {
869                 eth[12] = pkt[18];
870                 eth[13] = pkt[19];
871         } else {
872                 /* protocol numbers are from rfc-1700 or
873                  * http://www.iana.org/assignments/ethernet-numbers
874                  */
875                 if (pkt[12] >> 4 == 6) { /* version field from IP header */
876                         eth[12] = 0x86; /* IPv6 */
877                         eth[13] = 0xdd;
878                 } else {
879                         eth[12] = 0x08; /* IPv4 */
880                         eth[13] = 0x00;
881                 }
882         }
883
884         skb->protocol = dvb_net_eth_type_trans(skb, dev);
885
886         stats->rx_packets++;
887         stats->rx_bytes+=skb->len;
888         netif_rx(skb);
889 }
890
891 static int dvb_net_sec_callback(const u8 *buffer1, size_t buffer1_len,
892                  const u8 *buffer2, size_t buffer2_len,
893                  struct dmx_section_filter *filter,
894                  enum dmx_success success)
895 {
896         struct net_device *dev = filter->priv;
897
898         /**
899          * we rely on the DVB API definition where exactly one complete
900          * section is delivered in buffer1
901          */
902         dvb_net_sec (dev, buffer1, buffer1_len);
903         return 0;
904 }
905
906 static int dvb_net_tx(struct sk_buff *skb, struct net_device *dev)
907 {
908         dev_kfree_skb(skb);
909         return NETDEV_TX_OK;
910 }
911
912 static u8 mask_normal[6]={0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
913 static u8 mask_allmulti[6]={0xff, 0xff, 0xff, 0x00, 0x00, 0x00};
914 static u8 mac_allmulti[6]={0x01, 0x00, 0x5e, 0x00, 0x00, 0x00};
915 static u8 mask_promisc[6]={0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
916
917 static int dvb_net_filter_sec_set(struct net_device *dev,
918                    struct dmx_section_filter **secfilter,
919                    u8 *mac, u8 *mac_mask)
920 {
921         struct dvb_net_priv *priv = netdev_priv(dev);
922         int ret;
923
924         *secfilter=NULL;
925         ret = priv->secfeed->allocate_filter(priv->secfeed, secfilter);
926         if (ret<0) {
927                 printk("%s: could not get filter\n", dev->name);
928                 return ret;
929         }
930
931         (*secfilter)->priv=(void *) dev;
932
933         memset((*secfilter)->filter_value, 0x00, DMX_MAX_FILTER_SIZE);
934         memset((*secfilter)->filter_mask,  0x00, DMX_MAX_FILTER_SIZE);
935         memset((*secfilter)->filter_mode,  0xff, DMX_MAX_FILTER_SIZE);
936
937         (*secfilter)->filter_value[0]=0x3e;
938         (*secfilter)->filter_value[3]=mac[5];
939         (*secfilter)->filter_value[4]=mac[4];
940         (*secfilter)->filter_value[8]=mac[3];
941         (*secfilter)->filter_value[9]=mac[2];
942         (*secfilter)->filter_value[10]=mac[1];
943         (*secfilter)->filter_value[11]=mac[0];
944
945         (*secfilter)->filter_mask[0] = 0xff;
946         (*secfilter)->filter_mask[3] = mac_mask[5];
947         (*secfilter)->filter_mask[4] = mac_mask[4];
948         (*secfilter)->filter_mask[8] = mac_mask[3];
949         (*secfilter)->filter_mask[9] = mac_mask[2];
950         (*secfilter)->filter_mask[10] = mac_mask[1];
951         (*secfilter)->filter_mask[11]=mac_mask[0];
952
953         dprintk("%s: filter mac=%pM\n", dev->name, mac);
954         dprintk("%s: filter mask=%pM\n", dev->name, mac_mask);
955
956         return 0;
957 }
958
959 static int dvb_net_feed_start(struct net_device *dev)
960 {
961         int ret = 0, i;
962         struct dvb_net_priv *priv = netdev_priv(dev);
963         struct dmx_demux *demux = priv->demux;
964         unsigned char *mac = (unsigned char *) dev->dev_addr;
965
966         dprintk("%s: rx_mode %i\n", __func__, priv->rx_mode);
967         mutex_lock(&priv->mutex);
968         if (priv->tsfeed || priv->secfeed || priv->secfilter || priv->multi_secfilter[0])
969                 printk("%s: BUG %d\n", __func__, __LINE__);
970
971         priv->secfeed=NULL;
972         priv->secfilter=NULL;
973         priv->tsfeed = NULL;
974
975         if (priv->feedtype == DVB_NET_FEEDTYPE_MPE) {
976                 dprintk("%s: alloc secfeed\n", __func__);
977                 ret=demux->allocate_section_feed(demux, &priv->secfeed,
978                                          dvb_net_sec_callback);
979                 if (ret<0) {
980                         printk("%s: could not allocate section feed\n", dev->name);
981                         goto error;
982                 }
983
984                 ret = priv->secfeed->set(priv->secfeed, priv->pid, 32768, 1);
985
986                 if (ret<0) {
987                         printk("%s: could not set section feed\n", dev->name);
988                         priv->demux->release_section_feed(priv->demux, priv->secfeed);
989                         priv->secfeed=NULL;
990                         goto error;
991                 }
992
993                 if (priv->rx_mode != RX_MODE_PROMISC) {
994                         dprintk("%s: set secfilter\n", __func__);
995                         dvb_net_filter_sec_set(dev, &priv->secfilter, mac, mask_normal);
996                 }
997
998                 switch (priv->rx_mode) {
999                 case RX_MODE_MULTI:
1000                         for (i = 0; i < priv->multi_num; i++) {
1001                                 dprintk("%s: set multi_secfilter[%d]\n", __func__, i);
1002                                 dvb_net_filter_sec_set(dev, &priv->multi_secfilter[i],
1003                                                        priv->multi_macs[i], mask_normal);
1004                         }
1005                         break;
1006                 case RX_MODE_ALL_MULTI:
1007                         priv->multi_num=1;
1008                         dprintk("%s: set multi_secfilter[0]\n", __func__);
1009                         dvb_net_filter_sec_set(dev, &priv->multi_secfilter[0],
1010                                                mac_allmulti, mask_allmulti);
1011                         break;
1012                 case RX_MODE_PROMISC:
1013                         priv->multi_num=0;
1014                         dprintk("%s: set secfilter\n", __func__);
1015                         dvb_net_filter_sec_set(dev, &priv->secfilter, mac, mask_promisc);
1016                         break;
1017                 }
1018
1019                 dprintk("%s: start filtering\n", __func__);
1020                 priv->secfeed->start_filtering(priv->secfeed);
1021         } else if (priv->feedtype == DVB_NET_FEEDTYPE_ULE) {
1022                 struct timespec timeout = { 0, 10000000 }; // 10 msec
1023
1024                 /* we have payloads encapsulated in TS */
1025                 dprintk("%s: alloc tsfeed\n", __func__);
1026                 ret = demux->allocate_ts_feed(demux, &priv->tsfeed, dvb_net_ts_callback);
1027                 if (ret < 0) {
1028                         printk("%s: could not allocate ts feed\n", dev->name);
1029                         goto error;
1030                 }
1031
1032                 /* Set netdevice pointer for ts decaps callback. */
1033                 priv->tsfeed->priv = (void *)dev;
1034                 ret = priv->tsfeed->set(priv->tsfeed,
1035                                         priv->pid, /* pid */
1036                                         TS_PACKET, /* type */
1037                                         DMX_TS_PES_OTHER, /* pes type */
1038                                         32768,     /* circular buffer size */
1039                                         timeout    /* timeout */
1040                                         );
1041
1042                 if (ret < 0) {
1043                         printk("%s: could not set ts feed\n", dev->name);
1044                         priv->demux->release_ts_feed(priv->demux, priv->tsfeed);
1045                         priv->tsfeed = NULL;
1046                         goto error;
1047                 }
1048
1049                 dprintk("%s: start filtering\n", __func__);
1050                 priv->tsfeed->start_filtering(priv->tsfeed);
1051         } else
1052                 ret = -EINVAL;
1053
1054 error:
1055         mutex_unlock(&priv->mutex);
1056         return ret;
1057 }
1058
1059 static int dvb_net_feed_stop(struct net_device *dev)
1060 {
1061         struct dvb_net_priv *priv = netdev_priv(dev);
1062         int i, ret = 0;
1063
1064         dprintk("%s\n", __func__);
1065         mutex_lock(&priv->mutex);
1066         if (priv->feedtype == DVB_NET_FEEDTYPE_MPE) {
1067                 if (priv->secfeed) {
1068                         if (priv->secfeed->is_filtering) {
1069                                 dprintk("%s: stop secfeed\n", __func__);
1070                                 priv->secfeed->stop_filtering(priv->secfeed);
1071                         }
1072
1073                         if (priv->secfilter) {
1074                                 dprintk("%s: release secfilter\n", __func__);
1075                                 priv->secfeed->release_filter(priv->secfeed,
1076                                                               priv->secfilter);
1077                                 priv->secfilter=NULL;
1078                         }
1079
1080                         for (i=0; i<priv->multi_num; i++) {
1081                                 if (priv->multi_secfilter[i]) {
1082                                         dprintk("%s: release multi_filter[%d]\n",
1083                                                 __func__, i);
1084                                         priv->secfeed->release_filter(priv->secfeed,
1085                                                                       priv->multi_secfilter[i]);
1086                                         priv->multi_secfilter[i] = NULL;
1087                                 }
1088                         }
1089
1090                         priv->demux->release_section_feed(priv->demux, priv->secfeed);
1091                         priv->secfeed = NULL;
1092                 } else
1093                         printk("%s: no feed to stop\n", dev->name);
1094         } else if (priv->feedtype == DVB_NET_FEEDTYPE_ULE) {
1095                 if (priv->tsfeed) {
1096                         if (priv->tsfeed->is_filtering) {
1097                                 dprintk("%s: stop tsfeed\n", __func__);
1098                                 priv->tsfeed->stop_filtering(priv->tsfeed);
1099                         }
1100                         priv->demux->release_ts_feed(priv->demux, priv->tsfeed);
1101                         priv->tsfeed = NULL;
1102                 }
1103                 else
1104                         printk("%s: no ts feed to stop\n", dev->name);
1105         } else
1106                 ret = -EINVAL;
1107         mutex_unlock(&priv->mutex);
1108         return ret;
1109 }
1110
1111
1112 static int dvb_set_mc_filter (struct net_device *dev, struct dev_mc_list *mc)
1113 {
1114         struct dvb_net_priv *priv = netdev_priv(dev);
1115
1116         if (priv->multi_num == DVB_NET_MULTICAST_MAX)
1117                 return -ENOMEM;
1118
1119         memcpy(priv->multi_macs[priv->multi_num], mc->dmi_addr, 6);
1120
1121         priv->multi_num++;
1122         return 0;
1123 }
1124
1125
1126 static void wq_set_multicast_list (struct work_struct *work)
1127 {
1128         struct dvb_net_priv *priv =
1129                 container_of(work, struct dvb_net_priv, set_multicast_list_wq);
1130         struct net_device *dev = priv->net;
1131
1132         dvb_net_feed_stop(dev);
1133         priv->rx_mode = RX_MODE_UNI;
1134         netif_addr_lock_bh(dev);
1135
1136         if (dev->flags & IFF_PROMISC) {
1137                 dprintk("%s: promiscuous mode\n", dev->name);
1138                 priv->rx_mode = RX_MODE_PROMISC;
1139         } else if ((dev->flags & IFF_ALLMULTI)) {
1140                 dprintk("%s: allmulti mode\n", dev->name);
1141                 priv->rx_mode = RX_MODE_ALL_MULTI;
1142         } else if (!netdev_mc_empty(dev)) {
1143                 int mci;
1144                 struct dev_mc_list *mc;
1145
1146                 dprintk("%s: set_mc_list, %d entries\n",
1147                         dev->name, netdev_mc_count(dev));
1148
1149                 priv->rx_mode = RX_MODE_MULTI;
1150                 priv->multi_num = 0;
1151
1152                 for (mci = 0, mc=dev->mc_list;
1153                      mci < netdev_mc_count(dev);
1154                      mc = mc->next, mci++) {
1155                         dvb_set_mc_filter(dev, mc);
1156                 }
1157         }
1158
1159         netif_addr_unlock_bh(dev);
1160         dvb_net_feed_start(dev);
1161 }
1162
1163
1164 static void dvb_net_set_multicast_list (struct net_device *dev)
1165 {
1166         struct dvb_net_priv *priv = netdev_priv(dev);
1167         schedule_work(&priv->set_multicast_list_wq);
1168 }
1169
1170
1171 static void wq_restart_net_feed (struct work_struct *work)
1172 {
1173         struct dvb_net_priv *priv =
1174                 container_of(work, struct dvb_net_priv, restart_net_feed_wq);
1175         struct net_device *dev = priv->net;
1176
1177         if (netif_running(dev)) {
1178                 dvb_net_feed_stop(dev);
1179                 dvb_net_feed_start(dev);
1180         }
1181 }
1182
1183
1184 static int dvb_net_set_mac (struct net_device *dev, void *p)
1185 {
1186         struct dvb_net_priv *priv = netdev_priv(dev);
1187         struct sockaddr *addr=p;
1188
1189         memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1190
1191         if (netif_running(dev))
1192                 schedule_work(&priv->restart_net_feed_wq);
1193
1194         return 0;
1195 }
1196
1197
1198 static int dvb_net_open(struct net_device *dev)
1199 {
1200         struct dvb_net_priv *priv = netdev_priv(dev);
1201
1202         priv->in_use++;
1203         dvb_net_feed_start(dev);
1204         return 0;
1205 }
1206
1207
1208 static int dvb_net_stop(struct net_device *dev)
1209 {
1210         struct dvb_net_priv *priv = netdev_priv(dev);
1211
1212         priv->in_use--;
1213         return dvb_net_feed_stop(dev);
1214 }
1215
1216 static const struct header_ops dvb_header_ops = {
1217         .create         = eth_header,
1218         .parse          = eth_header_parse,
1219         .rebuild        = eth_rebuild_header,
1220 };
1221
1222
1223 static const struct net_device_ops dvb_netdev_ops = {
1224         .ndo_open               = dvb_net_open,
1225         .ndo_stop               = dvb_net_stop,
1226         .ndo_start_xmit         = dvb_net_tx,
1227         .ndo_set_multicast_list = dvb_net_set_multicast_list,
1228         .ndo_set_mac_address    = dvb_net_set_mac,
1229         .ndo_change_mtu         = eth_change_mtu,
1230         .ndo_validate_addr      = eth_validate_addr,
1231 };
1232
1233 static void dvb_net_setup(struct net_device *dev)
1234 {
1235         ether_setup(dev);
1236
1237         dev->header_ops         = &dvb_header_ops;
1238         dev->netdev_ops         = &dvb_netdev_ops;
1239         dev->mtu                = 4096;
1240
1241         dev->flags |= IFF_NOARP;
1242 }
1243
1244 static int get_if(struct dvb_net *dvbnet)
1245 {
1246         int i;
1247
1248         for (i=0; i<DVB_NET_DEVICES_MAX; i++)
1249                 if (!dvbnet->state[i])
1250                         break;
1251
1252         if (i == DVB_NET_DEVICES_MAX)
1253                 return -1;
1254
1255         dvbnet->state[i]=1;
1256         return i;
1257 }
1258
1259 static int dvb_net_add_if(struct dvb_net *dvbnet, u16 pid, u8 feedtype)
1260 {
1261         struct net_device *net;
1262         struct dvb_net_priv *priv;
1263         int result;
1264         int if_num;
1265
1266         if (feedtype != DVB_NET_FEEDTYPE_MPE && feedtype != DVB_NET_FEEDTYPE_ULE)
1267                 return -EINVAL;
1268         if ((if_num = get_if(dvbnet)) < 0)
1269                 return -EINVAL;
1270
1271         net = alloc_netdev(sizeof(struct dvb_net_priv), "dvb", dvb_net_setup);
1272         if (!net)
1273                 return -ENOMEM;
1274
1275         if (dvbnet->dvbdev->id)
1276                 snprintf(net->name, IFNAMSIZ, "dvb%d%u%d",
1277                          dvbnet->dvbdev->adapter->num, dvbnet->dvbdev->id, if_num);
1278         else
1279                 /* compatibility fix to keep dvb0_0 format */
1280                 snprintf(net->name, IFNAMSIZ, "dvb%d_%d",
1281                          dvbnet->dvbdev->adapter->num, if_num);
1282
1283         net->addr_len = 6;
1284         memcpy(net->dev_addr, dvbnet->dvbdev->adapter->proposed_mac, 6);
1285
1286         dvbnet->device[if_num] = net;
1287
1288         priv = netdev_priv(net);
1289         priv->net = net;
1290         priv->demux = dvbnet->demux;
1291         priv->pid = pid;
1292         priv->rx_mode = RX_MODE_UNI;
1293         priv->need_pusi = 1;
1294         priv->tscc = 0;
1295         priv->feedtype = feedtype;
1296         reset_ule(priv);
1297
1298         INIT_WORK(&priv->set_multicast_list_wq, wq_set_multicast_list);
1299         INIT_WORK(&priv->restart_net_feed_wq, wq_restart_net_feed);
1300         mutex_init(&priv->mutex);
1301
1302         net->base_addr = pid;
1303
1304         if ((result = register_netdev(net)) < 0) {
1305                 dvbnet->device[if_num] = NULL;
1306                 free_netdev(net);
1307                 return result;
1308         }
1309         printk("dvb_net: created network interface %s\n", net->name);
1310
1311         return if_num;
1312 }
1313
1314 static int dvb_net_remove_if(struct dvb_net *dvbnet, unsigned long num)
1315 {
1316         struct net_device *net = dvbnet->device[num];
1317         struct dvb_net_priv *priv;
1318
1319         if (!dvbnet->state[num])
1320                 return -EINVAL;
1321         priv = netdev_priv(net);
1322         if (priv->in_use)
1323                 return -EBUSY;
1324
1325         dvb_net_stop(net);
1326         flush_scheduled_work();
1327         printk("dvb_net: removed network interface %s\n", net->name);
1328         unregister_netdev(net);
1329         dvbnet->state[num]=0;
1330         dvbnet->device[num] = NULL;
1331         free_netdev(net);
1332
1333         return 0;
1334 }
1335
1336 static int dvb_net_do_ioctl(struct inode *inode, struct file *file,
1337                   unsigned int cmd, void *parg)
1338 {
1339         struct dvb_device *dvbdev = file->private_data;
1340         struct dvb_net *dvbnet = dvbdev->priv;
1341
1342         if (((file->f_flags&O_ACCMODE)==O_RDONLY))
1343                 return -EPERM;
1344
1345         switch (cmd) {
1346         case NET_ADD_IF:
1347         {
1348                 struct dvb_net_if *dvbnetif = parg;
1349                 int result;
1350
1351                 if (!capable(CAP_SYS_ADMIN))
1352                         return -EPERM;
1353
1354                 if (!try_module_get(dvbdev->adapter->module))
1355                         return -EPERM;
1356
1357                 result=dvb_net_add_if(dvbnet, dvbnetif->pid, dvbnetif->feedtype);
1358                 if (result<0) {
1359                         module_put(dvbdev->adapter->module);
1360                         return result;
1361                 }
1362                 dvbnetif->if_num=result;
1363                 break;
1364         }
1365         case NET_GET_IF:
1366         {
1367                 struct net_device *netdev;
1368                 struct dvb_net_priv *priv_data;
1369                 struct dvb_net_if *dvbnetif = parg;
1370
1371                 if (dvbnetif->if_num >= DVB_NET_DEVICES_MAX ||
1372                     !dvbnet->state[dvbnetif->if_num])
1373                         return -EINVAL;
1374
1375                 netdev = dvbnet->device[dvbnetif->if_num];
1376
1377                 priv_data = netdev_priv(netdev);
1378                 dvbnetif->pid=priv_data->pid;
1379                 dvbnetif->feedtype=priv_data->feedtype;
1380                 break;
1381         }
1382         case NET_REMOVE_IF:
1383         {
1384                 int ret;
1385
1386                 if (!capable(CAP_SYS_ADMIN))
1387                         return -EPERM;
1388                 if ((unsigned long) parg >= DVB_NET_DEVICES_MAX)
1389                         return -EINVAL;
1390                 ret = dvb_net_remove_if(dvbnet, (unsigned long) parg);
1391                 if (!ret)
1392                         module_put(dvbdev->adapter->module);
1393                 return ret;
1394         }
1395
1396         /* binary compatibility cruft */
1397         case __NET_ADD_IF_OLD:
1398         {
1399                 struct __dvb_net_if_old *dvbnetif = parg;
1400                 int result;
1401
1402                 if (!capable(CAP_SYS_ADMIN))
1403                         return -EPERM;
1404
1405                 if (!try_module_get(dvbdev->adapter->module))
1406                         return -EPERM;
1407
1408                 result=dvb_net_add_if(dvbnet, dvbnetif->pid, DVB_NET_FEEDTYPE_MPE);
1409                 if (result<0) {
1410                         module_put(dvbdev->adapter->module);
1411                         return result;
1412                 }
1413                 dvbnetif->if_num=result;
1414                 break;
1415         }
1416         case __NET_GET_IF_OLD:
1417         {
1418                 struct net_device *netdev;
1419                 struct dvb_net_priv *priv_data;
1420                 struct __dvb_net_if_old *dvbnetif = parg;
1421
1422                 if (dvbnetif->if_num >= DVB_NET_DEVICES_MAX ||
1423                     !dvbnet->state[dvbnetif->if_num])
1424                         return -EINVAL;
1425
1426                 netdev = dvbnet->device[dvbnetif->if_num];
1427
1428                 priv_data = netdev_priv(netdev);
1429                 dvbnetif->pid=priv_data->pid;
1430                 break;
1431         }
1432         default:
1433                 return -ENOTTY;
1434         }
1435         return 0;
1436 }
1437
1438 static int dvb_net_ioctl(struct inode *inode, struct file *file,
1439               unsigned int cmd, unsigned long arg)
1440 {
1441         return dvb_usercopy(inode, file, cmd, arg, dvb_net_do_ioctl);
1442 }
1443
1444 static int dvb_net_close(struct inode *inode, struct file *file)
1445 {
1446         struct dvb_device *dvbdev = file->private_data;
1447         struct dvb_net *dvbnet = dvbdev->priv;
1448
1449         dvb_generic_release(inode, file);
1450
1451         if(dvbdev->users == 1 && dvbnet->exit == 1) {
1452                 fops_put(file->f_op);
1453                 file->f_op = NULL;
1454                 wake_up(&dvbdev->wait_queue);
1455         }
1456         return 0;
1457 }
1458
1459
1460 static const struct file_operations dvb_net_fops = {
1461         .owner = THIS_MODULE,
1462         .ioctl = dvb_net_ioctl,
1463         .open = dvb_generic_open,
1464         .release = dvb_net_close,
1465 };
1466
1467 static struct dvb_device dvbdev_net = {
1468         .priv = NULL,
1469         .users = 1,
1470         .writers = 1,
1471         .fops = &dvb_net_fops,
1472 };
1473
1474
1475 void dvb_net_release (struct dvb_net *dvbnet)
1476 {
1477         int i;
1478
1479         dvbnet->exit = 1;
1480         if (dvbnet->dvbdev->users < 1)
1481                 wait_event(dvbnet->dvbdev->wait_queue,
1482                                 dvbnet->dvbdev->users==1);
1483
1484         dvb_unregister_device(dvbnet->dvbdev);
1485
1486         for (i=0; i<DVB_NET_DEVICES_MAX; i++) {
1487                 if (!dvbnet->state[i])
1488                         continue;
1489                 dvb_net_remove_if(dvbnet, i);
1490         }
1491 }
1492 EXPORT_SYMBOL(dvb_net_release);
1493
1494
1495 int dvb_net_init (struct dvb_adapter *adap, struct dvb_net *dvbnet,
1496                   struct dmx_demux *dmx)
1497 {
1498         int i;
1499
1500         dvbnet->demux = dmx;
1501
1502         for (i=0; i<DVB_NET_DEVICES_MAX; i++)
1503                 dvbnet->state[i] = 0;
1504
1505         dvb_register_device (adap, &dvbnet->dvbdev, &dvbdev_net,
1506                              dvbnet, DVB_DEVICE_NET);
1507
1508         return 0;
1509 }
1510 EXPORT_SYMBOL(dvb_net_init);