4df42aaae7f708801663dfc3eea018ee7ed9cfc8
[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         bool error = false;
354
355 #ifdef ULE_DEBUG
356         /* The code inside ULE_DEBUG keeps a history of the last 100 TS cells processed. */
357         static unsigned char ule_hist[100*TS_SZ];
358         static unsigned char *ule_where = ule_hist, ule_dump;
359 #endif
360
361         /* For all TS cells in current buffer.
362          * Appearently, we are called for every single TS cell.
363          */
364         for (ts = buf, ts_end = buf + buf_len; ts < ts_end; /* no default incr. */ ) {
365
366                 if (new_ts) {
367                         /* We are about to process a new TS cell. */
368
369 #ifdef ULE_DEBUG
370                         if (ule_where >= &ule_hist[100*TS_SZ]) ule_where = ule_hist;
371                         memcpy( ule_where, ts, TS_SZ );
372                         if (ule_dump) {
373                                 hexdump( ule_where, TS_SZ );
374                                 ule_dump = 0;
375                         }
376                         ule_where += TS_SZ;
377 #endif
378
379                         /* Check TS error conditions: sync_byte, transport_error_indicator, scrambling_control . */
380                         if ((ts[0] != TS_SYNC) || (ts[1] & TS_TEI) || ((ts[3] & TS_SC) != 0)) {
381                                 printk(KERN_WARNING "%lu: Invalid TS cell: SYNC %#x, TEI %u, SC %#x.\n",
382                                        priv->ts_count, ts[0], ts[1] & TS_TEI >> 7, ts[3] & 0xC0 >> 6);
383
384                                 /* Drop partly decoded SNDU, reset state, resync on PUSI. */
385                                 if (priv->ule_skb) {
386                                         dev_kfree_skb( priv->ule_skb );
387                                         /* Prepare for next SNDU. */
388                                         dev->stats.rx_errors++;
389                                         dev->stats.rx_frame_errors++;
390                                 }
391                                 reset_ule(priv);
392                                 priv->need_pusi = 1;
393
394                                 /* Continue with next TS cell. */
395                                 ts += TS_SZ;
396                                 priv->ts_count++;
397                                 continue;
398                         }
399
400                         ts_remain = 184;
401                         from_where = ts + 4;
402                 }
403                 /* Synchronize on PUSI, if required. */
404                 if (priv->need_pusi) {
405                         if (ts[1] & TS_PUSI) {
406                                 /* Find beginning of first ULE SNDU in current TS cell. */
407                                 /* Synchronize continuity counter. */
408                                 priv->tscc = ts[3] & 0x0F;
409                                 /* There is a pointer field here. */
410                                 if (ts[4] > ts_remain) {
411                                         printk(KERN_ERR "%lu: Invalid ULE packet "
412                                                "(pointer field %d)\n", priv->ts_count, ts[4]);
413                                         ts += TS_SZ;
414                                         priv->ts_count++;
415                                         continue;
416                                 }
417                                 /* Skip to destination of pointer field. */
418                                 from_where = &ts[5] + ts[4];
419                                 ts_remain -= 1 + ts[4];
420                                 skipped = 0;
421                         } else {
422                                 skipped++;
423                                 ts += TS_SZ;
424                                 priv->ts_count++;
425                                 continue;
426                         }
427                 }
428
429                 if (new_ts) {
430                         /* Check continuity counter. */
431                         if ((ts[3] & 0x0F) == priv->tscc)
432                                 priv->tscc = (priv->tscc + 1) & 0x0F;
433                         else {
434                                 /* TS discontinuity handling: */
435                                 printk(KERN_WARNING "%lu: TS discontinuity: got %#x, "
436                                        "expected %#x.\n", priv->ts_count, ts[3] & 0x0F, priv->tscc);
437                                 /* Drop partly decoded SNDU, reset state, resync on PUSI. */
438                                 if (priv->ule_skb) {
439                                         dev_kfree_skb( priv->ule_skb );
440                                         /* Prepare for next SNDU. */
441                                         // reset_ule(priv);  moved to below.
442                                         dev->stats.rx_errors++;
443                                         dev->stats.rx_frame_errors++;
444                                 }
445                                 reset_ule(priv);
446                                 /* skip to next PUSI. */
447                                 priv->need_pusi = 1;
448                                 continue;
449                         }
450                         /* If we still have an incomplete payload, but PUSI is
451                          * set; some TS cells are missing.
452                          * This is only possible here, if we missed exactly 16 TS
453                          * cells (continuity counter wrap). */
454                         if (ts[1] & TS_PUSI) {
455                                 if (! priv->need_pusi) {
456                                         if (!(*from_where < (ts_remain-1)) || *from_where != priv->ule_sndu_remain) {
457                                                 /* Pointer field is invalid.  Drop this TS cell and any started ULE SNDU. */
458                                                 printk(KERN_WARNING "%lu: Invalid pointer "
459                                                        "field: %u.\n", priv->ts_count, *from_where);
460
461                                                 /* Drop partly decoded SNDU, reset state, resync on PUSI. */
462                                                 if (priv->ule_skb) {
463                                                         error = true;
464                                                         dev_kfree_skb(priv->ule_skb);
465                                                 }
466
467                                                 if (error || priv->ule_sndu_remain) {
468                                                         dev->stats.rx_errors++;
469                                                         dev->stats.rx_frame_errors++;
470                                                         error = false;
471                                                 }
472
473                                                 reset_ule(priv);
474                                                 priv->need_pusi = 1;
475                                                 continue;
476                                         }
477                                         /* Skip pointer field (we're processing a
478                                          * packed payload). */
479                                         from_where += 1;
480                                         ts_remain -= 1;
481                                 } else
482                                         priv->need_pusi = 0;
483
484                                 if (priv->ule_sndu_remain > 183) {
485                                         /* Current SNDU lacks more data than there could be available in the
486                                          * current TS cell. */
487                                         dev->stats.rx_errors++;
488                                         dev->stats.rx_length_errors++;
489                                         printk(KERN_WARNING "%lu: Expected %d more SNDU bytes, but "
490                                                "got PUSI (pf %d, ts_remain %d).  Flushing incomplete payload.\n",
491                                                priv->ts_count, priv->ule_sndu_remain, ts[4], ts_remain);
492                                         dev_kfree_skb(priv->ule_skb);
493                                         /* Prepare for next SNDU. */
494                                         reset_ule(priv);
495                                         /* Resync: go to where pointer field points to: start of next ULE SNDU. */
496                                         from_where += ts[4];
497                                         ts_remain -= ts[4];
498                                 }
499                         }
500                 }
501
502                 /* Check if new payload needs to be started. */
503                 if (priv->ule_skb == NULL) {
504                         /* Start a new payload with skb.
505                          * Find ULE header.  It is only guaranteed that the
506                          * length field (2 bytes) is contained in the current
507                          * TS.
508                          * Check ts_remain has to be >= 2 here. */
509                         if (ts_remain < 2) {
510                                 printk(KERN_WARNING "Invalid payload packing: only %d "
511                                        "bytes left in TS.  Resyncing.\n", ts_remain);
512                                 priv->ule_sndu_len = 0;
513                                 priv->need_pusi = 1;
514                                 ts += TS_SZ;
515                                 continue;
516                         }
517
518                         if (! priv->ule_sndu_len) {
519                                 /* Got at least two bytes, thus extrace the SNDU length. */
520                                 priv->ule_sndu_len = from_where[0] << 8 | from_where[1];
521                                 if (priv->ule_sndu_len & 0x8000) {
522                                         /* D-Bit is set: no dest mac present. */
523                                         priv->ule_sndu_len &= 0x7FFF;
524                                         priv->ule_dbit = 1;
525                                 } else
526                                         priv->ule_dbit = 0;
527
528                                 if (priv->ule_sndu_len < 5) {
529                                         printk(KERN_WARNING "%lu: Invalid ULE SNDU length %u. "
530                                                "Resyncing.\n", priv->ts_count, priv->ule_sndu_len);
531                                         dev->stats.rx_errors++;
532                                         dev->stats.rx_length_errors++;
533                                         priv->ule_sndu_len = 0;
534                                         priv->need_pusi = 1;
535                                         new_ts = 1;
536                                         ts += TS_SZ;
537                                         priv->ts_count++;
538                                         continue;
539                                 }
540                                 ts_remain -= 2; /* consume the 2 bytes SNDU length. */
541                                 from_where += 2;
542                         }
543
544                         priv->ule_sndu_remain = priv->ule_sndu_len + 2;
545                         /*
546                          * State of current TS:
547                          *   ts_remain (remaining bytes in the current TS cell)
548                          *   0  ule_type is not available now, we need the next TS cell
549                          *   1  the first byte of the ule_type is present
550                          * >=2  full ULE header present, maybe some payload data as well.
551                          */
552                         switch (ts_remain) {
553                                 case 1:
554                                         priv->ule_sndu_remain--;
555                                         priv->ule_sndu_type = from_where[0] << 8;
556                                         priv->ule_sndu_type_1 = 1; /* first byte of ule_type is set. */
557                                         ts_remain -= 1; from_where += 1;
558                                         /* Continue w/ next TS. */
559                                 case 0:
560                                         new_ts = 1;
561                                         ts += TS_SZ;
562                                         priv->ts_count++;
563                                         continue;
564
565                                 default: /* complete ULE header is present in current TS. */
566                                         /* Extract ULE type field. */
567                                         if (priv->ule_sndu_type_1) {
568                                                 priv->ule_sndu_type_1 = 0;
569                                                 priv->ule_sndu_type |= from_where[0];
570                                                 from_where += 1; /* points to payload start. */
571                                                 ts_remain -= 1;
572                                         } else {
573                                                 /* Complete type is present in new TS. */
574                                                 priv->ule_sndu_type = from_where[0] << 8 | from_where[1];
575                                                 from_where += 2; /* points to payload start. */
576                                                 ts_remain -= 2;
577                                         }
578                                         break;
579                         }
580
581                         /* Allocate the skb (decoder target buffer) with the correct size, as follows:
582                          * prepare for the largest case: bridged SNDU with MAC address (dbit = 0). */
583                         priv->ule_skb = dev_alloc_skb( priv->ule_sndu_len + ETH_HLEN + ETH_ALEN );
584                         if (priv->ule_skb == NULL) {
585                                 printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n",
586                                        dev->name);
587                                 dev->stats.rx_dropped++;
588                                 return;
589                         }
590
591                         /* This includes the CRC32 _and_ dest mac, if !dbit. */
592                         priv->ule_sndu_remain = priv->ule_sndu_len;
593                         priv->ule_skb->dev = dev;
594                         /* Leave space for Ethernet or bridged SNDU header (eth hdr plus one MAC addr). */
595                         skb_reserve( priv->ule_skb, ETH_HLEN + ETH_ALEN );
596                 }
597
598                 /* Copy data into our current skb. */
599                 how_much = min(priv->ule_sndu_remain, (int)ts_remain);
600                 memcpy(skb_put(priv->ule_skb, how_much), from_where, how_much);
601                 priv->ule_sndu_remain -= how_much;
602                 ts_remain -= how_much;
603                 from_where += how_much;
604
605                 /* Check for complete payload. */
606                 if (priv->ule_sndu_remain <= 0) {
607                         /* Check CRC32, we've got it in our skb already. */
608                         __be16 ulen = htons(priv->ule_sndu_len);
609                         __be16 utype = htons(priv->ule_sndu_type);
610                         const u8 *tail;
611                         struct kvec iov[3] = {
612                                 { &ulen, sizeof ulen },
613                                 { &utype, sizeof utype },
614                                 { priv->ule_skb->data, priv->ule_skb->len - 4 }
615                         };
616                         u32 ule_crc = ~0L, expected_crc;
617                         if (priv->ule_dbit) {
618                                 /* Set D-bit for CRC32 verification,
619                                  * if it was set originally. */
620                                 ulen |= htons(0x8000);
621                         }
622
623                         ule_crc = iov_crc32(ule_crc, iov, 3);
624                         tail = skb_tail_pointer(priv->ule_skb);
625                         expected_crc = *(tail - 4) << 24 |
626                                        *(tail - 3) << 16 |
627                                        *(tail - 2) << 8 |
628                                        *(tail - 1);
629                         if (ule_crc != expected_crc) {
630                                 printk(KERN_WARNING "%lu: CRC32 check FAILED: %08x / %08x, SNDU len %d type %#x, ts_remain %d, next 2: %x.\n",
631                                        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);
632
633 #ifdef ULE_DEBUG
634                                 hexdump( iov[0].iov_base, iov[0].iov_len );
635                                 hexdump( iov[1].iov_base, iov[1].iov_len );
636                                 hexdump( iov[2].iov_base, iov[2].iov_len );
637
638                                 if (ule_where == ule_hist) {
639                                         hexdump( &ule_hist[98*TS_SZ], TS_SZ );
640                                         hexdump( &ule_hist[99*TS_SZ], TS_SZ );
641                                 } else if (ule_where == &ule_hist[TS_SZ]) {
642                                         hexdump( &ule_hist[99*TS_SZ], TS_SZ );
643                                         hexdump( ule_hist, TS_SZ );
644                                 } else {
645                                         hexdump( ule_where - TS_SZ - TS_SZ, TS_SZ );
646                                         hexdump( ule_where - TS_SZ, TS_SZ );
647                                 }
648                                 ule_dump = 1;
649 #endif
650
651                                 dev->stats.rx_errors++;
652                                 dev->stats.rx_crc_errors++;
653                                 dev_kfree_skb(priv->ule_skb);
654                         } else {
655                                 /* CRC32 verified OK. */
656                                 u8 dest_addr[ETH_ALEN];
657                                 static const u8 bc_addr[ETH_ALEN] =
658                                         { [ 0 ... ETH_ALEN-1] = 0xff };
659
660                                 /* CRC32 was OK. Remove it from skb. */
661                                 priv->ule_skb->tail -= 4;
662                                 priv->ule_skb->len -= 4;
663
664                                 if (!priv->ule_dbit) {
665                                         /*
666                                          * The destination MAC address is the
667                                          * next data in the skb.  It comes
668                                          * before any extension headers.
669                                          *
670                                          * Check if the payload of this SNDU
671                                          * should be passed up the stack.
672                                          */
673                                         register int drop = 0;
674                                         if (priv->rx_mode != RX_MODE_PROMISC) {
675                                                 if (priv->ule_skb->data[0] & 0x01) {
676                                                         /* multicast or broadcast */
677                                                         if (memcmp(priv->ule_skb->data, bc_addr, ETH_ALEN)) {
678                                                                 /* multicast */
679                                                                 if (priv->rx_mode == RX_MODE_MULTI) {
680                                                                         int i;
681                                                                         for(i = 0; i < priv->multi_num && memcmp(priv->ule_skb->data, priv->multi_macs[i], ETH_ALEN); i++)
682                                                                                 ;
683                                                                         if (i == priv->multi_num)
684                                                                                 drop = 1;
685                                                                 } else if (priv->rx_mode != RX_MODE_ALL_MULTI)
686                                                                         drop = 1; /* no broadcast; */
687                                                                 /* else: all multicast mode: accept all multicast packets */
688                                                         }
689                                                         /* else: broadcast */
690                                                 }
691                                                 else if (memcmp(priv->ule_skb->data, dev->dev_addr, ETH_ALEN))
692                                                         drop = 1;
693                                                 /* else: destination address matches the MAC address of our receiver device */
694                                         }
695                                         /* else: promiscuous mode; pass everything up the stack */
696
697                                         if (drop) {
698 #ifdef ULE_DEBUG
699                                                 dprintk("Dropping SNDU: MAC destination address does not match: dest addr: "MAC_ADDR_PRINTFMT", dev addr: "MAC_ADDR_PRINTFMT"\n",
700                                                         MAX_ADDR_PRINTFMT_ARGS(priv->ule_skb->data), MAX_ADDR_PRINTFMT_ARGS(dev->dev_addr));
701 #endif
702                                                 dev_kfree_skb(priv->ule_skb);
703                                                 goto sndu_done;
704                                         }
705                                         else
706                                         {
707                                                 skb_copy_from_linear_data(priv->ule_skb,
708                                                               dest_addr,
709                                                               ETH_ALEN);
710                                                 skb_pull(priv->ule_skb, ETH_ALEN);
711                                         }
712                                 }
713
714                                 /* Handle ULE Extension Headers. */
715                                 if (priv->ule_sndu_type < 1536) {
716                                         /* There is an extension header.  Handle it accordingly. */
717                                         int l = handle_ule_extensions(priv);
718                                         if (l < 0) {
719                                                 /* Mandatory extension header unknown or TEST SNDU.  Drop it. */
720                                                 // printk( KERN_WARNING "Dropping SNDU, extension headers.\n" );
721                                                 dev_kfree_skb(priv->ule_skb);
722                                                 goto sndu_done;
723                                         }
724                                         skb_pull(priv->ule_skb, l);
725                                 }
726
727                                 /*
728                                  * Construct/assure correct ethernet header.
729                                  * Note: in bridged mode (priv->ule_bridged !=
730                                  * 0) we already have the (original) ethernet
731                                  * header at the start of the payload (after
732                                  * optional dest. address and any extension
733                                  * headers).
734                                  */
735
736                                 if (!priv->ule_bridged) {
737                                         skb_push(priv->ule_skb, ETH_HLEN);
738                                         ethh = (struct ethhdr *)priv->ule_skb->data;
739                                         if (!priv->ule_dbit) {
740                                                  /* dest_addr buffer is only valid if priv->ule_dbit == 0 */
741                                                 memcpy(ethh->h_dest, dest_addr, ETH_ALEN);
742                                                 memset(ethh->h_source, 0, ETH_ALEN);
743                                         }
744                                         else /* zeroize source and dest */
745                                                 memset( ethh, 0, ETH_ALEN*2 );
746
747                                         ethh->h_proto = htons(priv->ule_sndu_type);
748                                 }
749                                 /* else:  skb is in correct state; nothing to do. */
750                                 priv->ule_bridged = 0;
751
752                                 /* Stuff into kernel's protocol stack. */
753                                 priv->ule_skb->protocol = dvb_net_eth_type_trans(priv->ule_skb, dev);
754                                 /* If D-bit is set (i.e. destination MAC address not present),
755                                  * receive the packet anyhow. */
756                                 /* if (priv->ule_dbit && skb->pkt_type == PACKET_OTHERHOST)
757                                         priv->ule_skb->pkt_type = PACKET_HOST; */
758                                 dev->stats.rx_packets++;
759                                 dev->stats.rx_bytes += priv->ule_skb->len;
760                                 netif_rx(priv->ule_skb);
761                         }
762                         sndu_done:
763                         /* Prepare for next SNDU. */
764                         reset_ule(priv);
765                 }
766
767                 /* More data in current TS (look at the bytes following the CRC32)? */
768                 if (ts_remain >= 2 && *((unsigned short *)from_where) != 0xFFFF) {
769                         /* Next ULE SNDU starts right there. */
770                         new_ts = 0;
771                         priv->ule_skb = NULL;
772                         priv->ule_sndu_type_1 = 0;
773                         priv->ule_sndu_len = 0;
774                         // printk(KERN_WARNING "More data in current TS: [%#x %#x %#x %#x]\n",
775                         //      *(from_where + 0), *(from_where + 1),
776                         //      *(from_where + 2), *(from_where + 3));
777                         // printk(KERN_WARNING "ts @ %p, stopped @ %p:\n", ts, from_where + 0);
778                         // hexdump(ts, 188);
779                 } else {
780                         new_ts = 1;
781                         ts += TS_SZ;
782                         priv->ts_count++;
783                         if (priv->ule_skb == NULL) {
784                                 priv->need_pusi = 1;
785                                 priv->ule_sndu_type_1 = 0;
786                                 priv->ule_sndu_len = 0;
787                         }
788                 }
789         }       /* for all available TS cells */
790 }
791
792 static int dvb_net_ts_callback(const u8 *buffer1, size_t buffer1_len,
793                                const u8 *buffer2, size_t buffer2_len,
794                                struct dmx_ts_feed *feed, enum dmx_success success)
795 {
796         struct net_device *dev = feed->priv;
797
798         if (buffer2)
799                 printk(KERN_WARNING "buffer2 not NULL: %p.\n", buffer2);
800         if (buffer1_len > 32768)
801                 printk(KERN_WARNING "length > 32k: %zu.\n", buffer1_len);
802         /* printk("TS callback: %u bytes, %u TS cells @ %p.\n",
803                   buffer1_len, buffer1_len / TS_SZ, buffer1); */
804         dvb_net_ule(dev, buffer1, buffer1_len);
805         return 0;
806 }
807
808
809 static void dvb_net_sec(struct net_device *dev,
810                         const u8 *pkt, int pkt_len)
811 {
812         u8 *eth;
813         struct sk_buff *skb;
814         struct net_device_stats *stats = &dev->stats;
815         int snap = 0;
816
817         /* note: pkt_len includes a 32bit checksum */
818         if (pkt_len < 16) {
819                 printk("%s: IP/MPE packet length = %d too small.\n",
820                         dev->name, pkt_len);
821                 stats->rx_errors++;
822                 stats->rx_length_errors++;
823                 return;
824         }
825 /* it seems some ISPs manage to screw up here, so we have to
826  * relax the error checks... */
827 #if 0
828         if ((pkt[5] & 0xfd) != 0xc1) {
829                 /* drop scrambled or broken packets */
830 #else
831         if ((pkt[5] & 0x3c) != 0x00) {
832                 /* drop scrambled */
833 #endif
834                 stats->rx_errors++;
835                 stats->rx_crc_errors++;
836                 return;
837         }
838         if (pkt[5] & 0x02) {
839                 /* handle LLC/SNAP, see rfc-1042 */
840                 if (pkt_len < 24 || memcmp(&pkt[12], "\xaa\xaa\x03\0\0\0", 6)) {
841                         stats->rx_dropped++;
842                         return;
843                 }
844                 snap = 8;
845         }
846         if (pkt[7]) {
847                 /* FIXME: assemble datagram from multiple sections */
848                 stats->rx_errors++;
849                 stats->rx_frame_errors++;
850                 return;
851         }
852
853         /* we have 14 byte ethernet header (ip header follows);
854          * 12 byte MPE header; 4 byte checksum; + 2 byte alignment, 8 byte LLC/SNAP
855          */
856         if (!(skb = dev_alloc_skb(pkt_len - 4 - 12 + 14 + 2 - snap))) {
857                 //printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n", dev->name);
858                 stats->rx_dropped++;
859                 return;
860         }
861         skb_reserve(skb, 2);    /* longword align L3 header */
862         skb->dev = dev;
863
864         /* copy L3 payload */
865         eth = (u8 *) skb_put(skb, pkt_len - 12 - 4 + 14 - snap);
866         memcpy(eth + 14, pkt + 12 + snap, pkt_len - 12 - 4 - snap);
867
868         /* create ethernet header: */
869         eth[0]=pkt[0x0b];
870         eth[1]=pkt[0x0a];
871         eth[2]=pkt[0x09];
872         eth[3]=pkt[0x08];
873         eth[4]=pkt[0x04];
874         eth[5]=pkt[0x03];
875
876         eth[6]=eth[7]=eth[8]=eth[9]=eth[10]=eth[11]=0;
877
878         if (snap) {
879                 eth[12] = pkt[18];
880                 eth[13] = pkt[19];
881         } else {
882                 /* protocol numbers are from rfc-1700 or
883                  * http://www.iana.org/assignments/ethernet-numbers
884                  */
885                 if (pkt[12] >> 4 == 6) { /* version field from IP header */
886                         eth[12] = 0x86; /* IPv6 */
887                         eth[13] = 0xdd;
888                 } else {
889                         eth[12] = 0x08; /* IPv4 */
890                         eth[13] = 0x00;
891                 }
892         }
893
894         skb->protocol = dvb_net_eth_type_trans(skb, dev);
895
896         stats->rx_packets++;
897         stats->rx_bytes+=skb->len;
898         netif_rx(skb);
899 }
900
901 static int dvb_net_sec_callback(const u8 *buffer1, size_t buffer1_len,
902                  const u8 *buffer2, size_t buffer2_len,
903                  struct dmx_section_filter *filter,
904                  enum dmx_success success)
905 {
906         struct net_device *dev = filter->priv;
907
908         /**
909          * we rely on the DVB API definition where exactly one complete
910          * section is delivered in buffer1
911          */
912         dvb_net_sec (dev, buffer1, buffer1_len);
913         return 0;
914 }
915
916 static int dvb_net_tx(struct sk_buff *skb, struct net_device *dev)
917 {
918         dev_kfree_skb(skb);
919         return NETDEV_TX_OK;
920 }
921
922 static u8 mask_normal[6]={0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
923 static u8 mask_allmulti[6]={0xff, 0xff, 0xff, 0x00, 0x00, 0x00};
924 static u8 mac_allmulti[6]={0x01, 0x00, 0x5e, 0x00, 0x00, 0x00};
925 static u8 mask_promisc[6]={0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
926
927 static int dvb_net_filter_sec_set(struct net_device *dev,
928                    struct dmx_section_filter **secfilter,
929                    u8 *mac, u8 *mac_mask)
930 {
931         struct dvb_net_priv *priv = netdev_priv(dev);
932         int ret;
933
934         *secfilter=NULL;
935         ret = priv->secfeed->allocate_filter(priv->secfeed, secfilter);
936         if (ret<0) {
937                 printk("%s: could not get filter\n", dev->name);
938                 return ret;
939         }
940
941         (*secfilter)->priv=(void *) dev;
942
943         memset((*secfilter)->filter_value, 0x00, DMX_MAX_FILTER_SIZE);
944         memset((*secfilter)->filter_mask,  0x00, DMX_MAX_FILTER_SIZE);
945         memset((*secfilter)->filter_mode,  0xff, DMX_MAX_FILTER_SIZE);
946
947         (*secfilter)->filter_value[0]=0x3e;
948         (*secfilter)->filter_value[3]=mac[5];
949         (*secfilter)->filter_value[4]=mac[4];
950         (*secfilter)->filter_value[8]=mac[3];
951         (*secfilter)->filter_value[9]=mac[2];
952         (*secfilter)->filter_value[10]=mac[1];
953         (*secfilter)->filter_value[11]=mac[0];
954
955         (*secfilter)->filter_mask[0] = 0xff;
956         (*secfilter)->filter_mask[3] = mac_mask[5];
957         (*secfilter)->filter_mask[4] = mac_mask[4];
958         (*secfilter)->filter_mask[8] = mac_mask[3];
959         (*secfilter)->filter_mask[9] = mac_mask[2];
960         (*secfilter)->filter_mask[10] = mac_mask[1];
961         (*secfilter)->filter_mask[11]=mac_mask[0];
962
963         dprintk("%s: filter mac=%pM\n", dev->name, mac);
964         dprintk("%s: filter mask=%pM\n", dev->name, mac_mask);
965
966         return 0;
967 }
968
969 static int dvb_net_feed_start(struct net_device *dev)
970 {
971         int ret = 0, i;
972         struct dvb_net_priv *priv = netdev_priv(dev);
973         struct dmx_demux *demux = priv->demux;
974         unsigned char *mac = (unsigned char *) dev->dev_addr;
975
976         dprintk("%s: rx_mode %i\n", __func__, priv->rx_mode);
977         mutex_lock(&priv->mutex);
978         if (priv->tsfeed || priv->secfeed || priv->secfilter || priv->multi_secfilter[0])
979                 printk("%s: BUG %d\n", __func__, __LINE__);
980
981         priv->secfeed=NULL;
982         priv->secfilter=NULL;
983         priv->tsfeed = NULL;
984
985         if (priv->feedtype == DVB_NET_FEEDTYPE_MPE) {
986                 dprintk("%s: alloc secfeed\n", __func__);
987                 ret=demux->allocate_section_feed(demux, &priv->secfeed,
988                                          dvb_net_sec_callback);
989                 if (ret<0) {
990                         printk("%s: could not allocate section feed\n", dev->name);
991                         goto error;
992                 }
993
994                 ret = priv->secfeed->set(priv->secfeed, priv->pid, 32768, 1);
995
996                 if (ret<0) {
997                         printk("%s: could not set section feed\n", dev->name);
998                         priv->demux->release_section_feed(priv->demux, priv->secfeed);
999                         priv->secfeed=NULL;
1000                         goto error;
1001                 }
1002
1003                 if (priv->rx_mode != RX_MODE_PROMISC) {
1004                         dprintk("%s: set secfilter\n", __func__);
1005                         dvb_net_filter_sec_set(dev, &priv->secfilter, mac, mask_normal);
1006                 }
1007
1008                 switch (priv->rx_mode) {
1009                 case RX_MODE_MULTI:
1010                         for (i = 0; i < priv->multi_num; i++) {
1011                                 dprintk("%s: set multi_secfilter[%d]\n", __func__, i);
1012                                 dvb_net_filter_sec_set(dev, &priv->multi_secfilter[i],
1013                                                        priv->multi_macs[i], mask_normal);
1014                         }
1015                         break;
1016                 case RX_MODE_ALL_MULTI:
1017                         priv->multi_num=1;
1018                         dprintk("%s: set multi_secfilter[0]\n", __func__);
1019                         dvb_net_filter_sec_set(dev, &priv->multi_secfilter[0],
1020                                                mac_allmulti, mask_allmulti);
1021                         break;
1022                 case RX_MODE_PROMISC:
1023                         priv->multi_num=0;
1024                         dprintk("%s: set secfilter\n", __func__);
1025                         dvb_net_filter_sec_set(dev, &priv->secfilter, mac, mask_promisc);
1026                         break;
1027                 }
1028
1029                 dprintk("%s: start filtering\n", __func__);
1030                 priv->secfeed->start_filtering(priv->secfeed);
1031         } else if (priv->feedtype == DVB_NET_FEEDTYPE_ULE) {
1032                 struct timespec timeout = { 0, 10000000 }; // 10 msec
1033
1034                 /* we have payloads encapsulated in TS */
1035                 dprintk("%s: alloc tsfeed\n", __func__);
1036                 ret = demux->allocate_ts_feed(demux, &priv->tsfeed, dvb_net_ts_callback);
1037                 if (ret < 0) {
1038                         printk("%s: could not allocate ts feed\n", dev->name);
1039                         goto error;
1040                 }
1041
1042                 /* Set netdevice pointer for ts decaps callback. */
1043                 priv->tsfeed->priv = (void *)dev;
1044                 ret = priv->tsfeed->set(priv->tsfeed,
1045                                         priv->pid, /* pid */
1046                                         TS_PACKET, /* type */
1047                                         DMX_TS_PES_OTHER, /* pes type */
1048                                         32768,     /* circular buffer size */
1049                                         timeout    /* timeout */
1050                                         );
1051
1052                 if (ret < 0) {
1053                         printk("%s: could not set ts feed\n", dev->name);
1054                         priv->demux->release_ts_feed(priv->demux, priv->tsfeed);
1055                         priv->tsfeed = NULL;
1056                         goto error;
1057                 }
1058
1059                 dprintk("%s: start filtering\n", __func__);
1060                 priv->tsfeed->start_filtering(priv->tsfeed);
1061         } else
1062                 ret = -EINVAL;
1063
1064 error:
1065         mutex_unlock(&priv->mutex);
1066         return ret;
1067 }
1068
1069 static int dvb_net_feed_stop(struct net_device *dev)
1070 {
1071         struct dvb_net_priv *priv = netdev_priv(dev);
1072         int i, ret = 0;
1073
1074         dprintk("%s\n", __func__);
1075         mutex_lock(&priv->mutex);
1076         if (priv->feedtype == DVB_NET_FEEDTYPE_MPE) {
1077                 if (priv->secfeed) {
1078                         if (priv->secfeed->is_filtering) {
1079                                 dprintk("%s: stop secfeed\n", __func__);
1080                                 priv->secfeed->stop_filtering(priv->secfeed);
1081                         }
1082
1083                         if (priv->secfilter) {
1084                                 dprintk("%s: release secfilter\n", __func__);
1085                                 priv->secfeed->release_filter(priv->secfeed,
1086                                                               priv->secfilter);
1087                                 priv->secfilter=NULL;
1088                         }
1089
1090                         for (i=0; i<priv->multi_num; i++) {
1091                                 if (priv->multi_secfilter[i]) {
1092                                         dprintk("%s: release multi_filter[%d]\n",
1093                                                 __func__, i);
1094                                         priv->secfeed->release_filter(priv->secfeed,
1095                                                                       priv->multi_secfilter[i]);
1096                                         priv->multi_secfilter[i] = NULL;
1097                                 }
1098                         }
1099
1100                         priv->demux->release_section_feed(priv->demux, priv->secfeed);
1101                         priv->secfeed = NULL;
1102                 } else
1103                         printk("%s: no feed to stop\n", dev->name);
1104         } else if (priv->feedtype == DVB_NET_FEEDTYPE_ULE) {
1105                 if (priv->tsfeed) {
1106                         if (priv->tsfeed->is_filtering) {
1107                                 dprintk("%s: stop tsfeed\n", __func__);
1108                                 priv->tsfeed->stop_filtering(priv->tsfeed);
1109                         }
1110                         priv->demux->release_ts_feed(priv->demux, priv->tsfeed);
1111                         priv->tsfeed = NULL;
1112                 }
1113                 else
1114                         printk("%s: no ts feed to stop\n", dev->name);
1115         } else
1116                 ret = -EINVAL;
1117         mutex_unlock(&priv->mutex);
1118         return ret;
1119 }
1120
1121
1122 static int dvb_set_mc_filter(struct net_device *dev, unsigned char *addr)
1123 {
1124         struct dvb_net_priv *priv = netdev_priv(dev);
1125
1126         if (priv->multi_num == DVB_NET_MULTICAST_MAX)
1127                 return -ENOMEM;
1128
1129         memcpy(priv->multi_macs[priv->multi_num], addr, ETH_ALEN);
1130
1131         priv->multi_num++;
1132         return 0;
1133 }
1134
1135
1136 static void wq_set_multicast_list (struct work_struct *work)
1137 {
1138         struct dvb_net_priv *priv =
1139                 container_of(work, struct dvb_net_priv, set_multicast_list_wq);
1140         struct net_device *dev = priv->net;
1141
1142         dvb_net_feed_stop(dev);
1143         priv->rx_mode = RX_MODE_UNI;
1144         netif_addr_lock_bh(dev);
1145
1146         if (dev->flags & IFF_PROMISC) {
1147                 dprintk("%s: promiscuous mode\n", dev->name);
1148                 priv->rx_mode = RX_MODE_PROMISC;
1149         } else if ((dev->flags & IFF_ALLMULTI)) {
1150                 dprintk("%s: allmulti mode\n", dev->name);
1151                 priv->rx_mode = RX_MODE_ALL_MULTI;
1152         } else if (!netdev_mc_empty(dev)) {
1153                 struct netdev_hw_addr *ha;
1154
1155                 dprintk("%s: set_mc_list, %d entries\n",
1156                         dev->name, netdev_mc_count(dev));
1157
1158                 priv->rx_mode = RX_MODE_MULTI;
1159                 priv->multi_num = 0;
1160
1161                 netdev_for_each_mc_addr(ha, dev)
1162                         dvb_set_mc_filter(dev, ha->addr);
1163         }
1164
1165         netif_addr_unlock_bh(dev);
1166         dvb_net_feed_start(dev);
1167 }
1168
1169
1170 static void dvb_net_set_multicast_list (struct net_device *dev)
1171 {
1172         struct dvb_net_priv *priv = netdev_priv(dev);
1173         schedule_work(&priv->set_multicast_list_wq);
1174 }
1175
1176
1177 static void wq_restart_net_feed (struct work_struct *work)
1178 {
1179         struct dvb_net_priv *priv =
1180                 container_of(work, struct dvb_net_priv, restart_net_feed_wq);
1181         struct net_device *dev = priv->net;
1182
1183         if (netif_running(dev)) {
1184                 dvb_net_feed_stop(dev);
1185                 dvb_net_feed_start(dev);
1186         }
1187 }
1188
1189
1190 static int dvb_net_set_mac (struct net_device *dev, void *p)
1191 {
1192         struct dvb_net_priv *priv = netdev_priv(dev);
1193         struct sockaddr *addr=p;
1194
1195         memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1196
1197         if (netif_running(dev))
1198                 schedule_work(&priv->restart_net_feed_wq);
1199
1200         return 0;
1201 }
1202
1203
1204 static int dvb_net_open(struct net_device *dev)
1205 {
1206         struct dvb_net_priv *priv = netdev_priv(dev);
1207
1208         priv->in_use++;
1209         dvb_net_feed_start(dev);
1210         return 0;
1211 }
1212
1213
1214 static int dvb_net_stop(struct net_device *dev)
1215 {
1216         struct dvb_net_priv *priv = netdev_priv(dev);
1217
1218         priv->in_use--;
1219         return dvb_net_feed_stop(dev);
1220 }
1221
1222 static const struct header_ops dvb_header_ops = {
1223         .create         = eth_header,
1224         .parse          = eth_header_parse,
1225         .rebuild        = eth_rebuild_header,
1226 };
1227
1228
1229 static const struct net_device_ops dvb_netdev_ops = {
1230         .ndo_open               = dvb_net_open,
1231         .ndo_stop               = dvb_net_stop,
1232         .ndo_start_xmit         = dvb_net_tx,
1233         .ndo_set_multicast_list = dvb_net_set_multicast_list,
1234         .ndo_set_mac_address    = dvb_net_set_mac,
1235         .ndo_change_mtu         = eth_change_mtu,
1236         .ndo_validate_addr      = eth_validate_addr,
1237 };
1238
1239 static void dvb_net_setup(struct net_device *dev)
1240 {
1241         ether_setup(dev);
1242
1243         dev->header_ops         = &dvb_header_ops;
1244         dev->netdev_ops         = &dvb_netdev_ops;
1245         dev->mtu                = 4096;
1246
1247         dev->flags |= IFF_NOARP;
1248 }
1249
1250 static int get_if(struct dvb_net *dvbnet)
1251 {
1252         int i;
1253
1254         for (i=0; i<DVB_NET_DEVICES_MAX; i++)
1255                 if (!dvbnet->state[i])
1256                         break;
1257
1258         if (i == DVB_NET_DEVICES_MAX)
1259                 return -1;
1260
1261         dvbnet->state[i]=1;
1262         return i;
1263 }
1264
1265 static int dvb_net_add_if(struct dvb_net *dvbnet, u16 pid, u8 feedtype)
1266 {
1267         struct net_device *net;
1268         struct dvb_net_priv *priv;
1269         int result;
1270         int if_num;
1271
1272         if (feedtype != DVB_NET_FEEDTYPE_MPE && feedtype != DVB_NET_FEEDTYPE_ULE)
1273                 return -EINVAL;
1274         if ((if_num = get_if(dvbnet)) < 0)
1275                 return -EINVAL;
1276
1277         net = alloc_netdev(sizeof(struct dvb_net_priv), "dvb", dvb_net_setup);
1278         if (!net)
1279                 return -ENOMEM;
1280
1281         if (dvbnet->dvbdev->id)
1282                 snprintf(net->name, IFNAMSIZ, "dvb%d%u%d",
1283                          dvbnet->dvbdev->adapter->num, dvbnet->dvbdev->id, if_num);
1284         else
1285                 /* compatibility fix to keep dvb0_0 format */
1286                 snprintf(net->name, IFNAMSIZ, "dvb%d_%d",
1287                          dvbnet->dvbdev->adapter->num, if_num);
1288
1289         net->addr_len = 6;
1290         memcpy(net->dev_addr, dvbnet->dvbdev->adapter->proposed_mac, 6);
1291
1292         dvbnet->device[if_num] = net;
1293
1294         priv = netdev_priv(net);
1295         priv->net = net;
1296         priv->demux = dvbnet->demux;
1297         priv->pid = pid;
1298         priv->rx_mode = RX_MODE_UNI;
1299         priv->need_pusi = 1;
1300         priv->tscc = 0;
1301         priv->feedtype = feedtype;
1302         reset_ule(priv);
1303
1304         INIT_WORK(&priv->set_multicast_list_wq, wq_set_multicast_list);
1305         INIT_WORK(&priv->restart_net_feed_wq, wq_restart_net_feed);
1306         mutex_init(&priv->mutex);
1307
1308         net->base_addr = pid;
1309
1310         if ((result = register_netdev(net)) < 0) {
1311                 dvbnet->device[if_num] = NULL;
1312                 free_netdev(net);
1313                 return result;
1314         }
1315         printk("dvb_net: created network interface %s\n", net->name);
1316
1317         return if_num;
1318 }
1319
1320 static int dvb_net_remove_if(struct dvb_net *dvbnet, unsigned long num)
1321 {
1322         struct net_device *net = dvbnet->device[num];
1323         struct dvb_net_priv *priv;
1324
1325         if (!dvbnet->state[num])
1326                 return -EINVAL;
1327         priv = netdev_priv(net);
1328         if (priv->in_use)
1329                 return -EBUSY;
1330
1331         dvb_net_stop(net);
1332         flush_scheduled_work();
1333         printk("dvb_net: removed network interface %s\n", net->name);
1334         unregister_netdev(net);
1335         dvbnet->state[num]=0;
1336         dvbnet->device[num] = NULL;
1337         free_netdev(net);
1338
1339         return 0;
1340 }
1341
1342 static int dvb_net_do_ioctl(struct file *file,
1343                   unsigned int cmd, void *parg)
1344 {
1345         struct dvb_device *dvbdev = file->private_data;
1346         struct dvb_net *dvbnet = dvbdev->priv;
1347
1348         if (((file->f_flags&O_ACCMODE)==O_RDONLY))
1349                 return -EPERM;
1350
1351         switch (cmd) {
1352         case NET_ADD_IF:
1353         {
1354                 struct dvb_net_if *dvbnetif = parg;
1355                 int result;
1356
1357                 if (!capable(CAP_SYS_ADMIN))
1358                         return -EPERM;
1359
1360                 if (!try_module_get(dvbdev->adapter->module))
1361                         return -EPERM;
1362
1363                 result=dvb_net_add_if(dvbnet, dvbnetif->pid, dvbnetif->feedtype);
1364                 if (result<0) {
1365                         module_put(dvbdev->adapter->module);
1366                         return result;
1367                 }
1368                 dvbnetif->if_num=result;
1369                 break;
1370         }
1371         case NET_GET_IF:
1372         {
1373                 struct net_device *netdev;
1374                 struct dvb_net_priv *priv_data;
1375                 struct dvb_net_if *dvbnetif = parg;
1376
1377                 if (dvbnetif->if_num >= DVB_NET_DEVICES_MAX ||
1378                     !dvbnet->state[dvbnetif->if_num])
1379                         return -EINVAL;
1380
1381                 netdev = dvbnet->device[dvbnetif->if_num];
1382
1383                 priv_data = netdev_priv(netdev);
1384                 dvbnetif->pid=priv_data->pid;
1385                 dvbnetif->feedtype=priv_data->feedtype;
1386                 break;
1387         }
1388         case NET_REMOVE_IF:
1389         {
1390                 int ret;
1391
1392                 if (!capable(CAP_SYS_ADMIN))
1393                         return -EPERM;
1394                 if ((unsigned long) parg >= DVB_NET_DEVICES_MAX)
1395                         return -EINVAL;
1396                 ret = dvb_net_remove_if(dvbnet, (unsigned long) parg);
1397                 if (!ret)
1398                         module_put(dvbdev->adapter->module);
1399                 return ret;
1400         }
1401
1402         /* binary compatibility cruft */
1403         case __NET_ADD_IF_OLD:
1404         {
1405                 struct __dvb_net_if_old *dvbnetif = parg;
1406                 int result;
1407
1408                 if (!capable(CAP_SYS_ADMIN))
1409                         return -EPERM;
1410
1411                 if (!try_module_get(dvbdev->adapter->module))
1412                         return -EPERM;
1413
1414                 result=dvb_net_add_if(dvbnet, dvbnetif->pid, DVB_NET_FEEDTYPE_MPE);
1415                 if (result<0) {
1416                         module_put(dvbdev->adapter->module);
1417                         return result;
1418                 }
1419                 dvbnetif->if_num=result;
1420                 break;
1421         }
1422         case __NET_GET_IF_OLD:
1423         {
1424                 struct net_device *netdev;
1425                 struct dvb_net_priv *priv_data;
1426                 struct __dvb_net_if_old *dvbnetif = parg;
1427
1428                 if (dvbnetif->if_num >= DVB_NET_DEVICES_MAX ||
1429                     !dvbnet->state[dvbnetif->if_num])
1430                         return -EINVAL;
1431
1432                 netdev = dvbnet->device[dvbnetif->if_num];
1433
1434                 priv_data = netdev_priv(netdev);
1435                 dvbnetif->pid=priv_data->pid;
1436                 break;
1437         }
1438         default:
1439                 return -ENOTTY;
1440         }
1441         return 0;
1442 }
1443
1444 static long dvb_net_ioctl(struct file *file,
1445               unsigned int cmd, unsigned long arg)
1446 {
1447         return dvb_usercopy(file, cmd, arg, dvb_net_do_ioctl);
1448 }
1449
1450 static int dvb_net_close(struct inode *inode, struct file *file)
1451 {
1452         struct dvb_device *dvbdev = file->private_data;
1453         struct dvb_net *dvbnet = dvbdev->priv;
1454
1455         dvb_generic_release(inode, file);
1456
1457         if(dvbdev->users == 1 && dvbnet->exit == 1) {
1458                 fops_put(file->f_op);
1459                 file->f_op = NULL;
1460                 wake_up(&dvbdev->wait_queue);
1461         }
1462         return 0;
1463 }
1464
1465
1466 static const struct file_operations dvb_net_fops = {
1467         .owner = THIS_MODULE,
1468         .unlocked_ioctl = dvb_net_ioctl,
1469         .open = dvb_generic_open,
1470         .release = dvb_net_close,
1471         .llseek = noop_llseek,
1472 };
1473
1474 static struct dvb_device dvbdev_net = {
1475         .priv = NULL,
1476         .users = 1,
1477         .writers = 1,
1478         .fops = &dvb_net_fops,
1479 };
1480
1481
1482 void dvb_net_release (struct dvb_net *dvbnet)
1483 {
1484         int i;
1485
1486         dvbnet->exit = 1;
1487         if (dvbnet->dvbdev->users < 1)
1488                 wait_event(dvbnet->dvbdev->wait_queue,
1489                                 dvbnet->dvbdev->users==1);
1490
1491         dvb_unregister_device(dvbnet->dvbdev);
1492
1493         for (i=0; i<DVB_NET_DEVICES_MAX; i++) {
1494                 if (!dvbnet->state[i])
1495                         continue;
1496                 dvb_net_remove_if(dvbnet, i);
1497         }
1498 }
1499 EXPORT_SYMBOL(dvb_net_release);
1500
1501
1502 int dvb_net_init (struct dvb_adapter *adap, struct dvb_net *dvbnet,
1503                   struct dmx_demux *dmx)
1504 {
1505         int i;
1506
1507         dvbnet->demux = dmx;
1508
1509         for (i=0; i<DVB_NET_DEVICES_MAX; i++)
1510                 dvbnet->state[i] = 0;
1511
1512         dvb_register_device (adap, &dvbnet->dvbdev, &dvbdev_net,
1513                              dvbnet, DVB_DEVICE_NET);
1514
1515         return 0;
1516 }
1517 EXPORT_SYMBOL(dvb_net_init);