Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6
[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
67 #include "dvb_demux.h"
68 #include "dvb_net.h"
69
70 static int dvb_net_debug;
71 module_param(dvb_net_debug, int, 0444);
72 MODULE_PARM_DESC(dvb_net_debug, "enable debug messages");
73
74 #define dprintk(x...) do { if (dvb_net_debug) printk(x); } while (0)
75
76
77 static inline __u32 iov_crc32( __u32 c, struct kvec *iov, unsigned int cnt )
78 {
79         unsigned int j;
80         for (j = 0; j < cnt; j++)
81                 c = crc32_be( c, iov[j].iov_base, iov[j].iov_len );
82         return c;
83 }
84
85
86 #define DVB_NET_MULTICAST_MAX 10
87
88 #undef ULE_DEBUG
89
90 #ifdef ULE_DEBUG
91
92 #define MAC_ADDR_PRINTFMT "%.2x:%.2x:%.2x:%.2x:%.2x:%.2x"
93 #define MAX_ADDR_PRINTFMT_ARGS(macap) (macap)[0],(macap)[1],(macap)[2],(macap)[3],(macap)[4],(macap)[5]
94
95 #define isprint(c)      ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || (c >= '0' && c <= '9'))
96
97 static void hexdump( const unsigned char *buf, unsigned short len )
98 {
99         char str[80], octet[10];
100         int ofs, i, l;
101
102         for (ofs = 0; ofs < len; ofs += 16) {
103                 sprintf( str, "%03d: ", ofs );
104
105                 for (i = 0; i < 16; i++) {
106                         if ((i + ofs) < len)
107                                 sprintf( octet, "%02x ", buf[ofs + i] );
108                         else
109                                 strcpy( octet, "   " );
110
111                         strcat( str, octet );
112                 }
113                 strcat( str, "  " );
114                 l = strlen( str );
115
116                 for (i = 0; (i < 16) && ((i + ofs) < len); i++)
117                         str[l++] = isprint( buf[ofs + i] ) ? buf[ofs + i] : '.';
118
119                 str[l] = '\0';
120                 printk( KERN_WARNING "%s\n", str );
121         }
122 }
123
124 #endif
125
126 struct dvb_net_priv {
127         int in_use;
128         u16 pid;
129         struct net_device *net;
130         struct dvb_net *host;
131         struct dmx_demux *demux;
132         struct dmx_section_feed *secfeed;
133         struct dmx_section_filter *secfilter;
134         struct dmx_ts_feed *tsfeed;
135         int multi_num;
136         struct dmx_section_filter *multi_secfilter[DVB_NET_MULTICAST_MAX];
137         unsigned char multi_macs[DVB_NET_MULTICAST_MAX][6];
138         int rx_mode;
139 #define RX_MODE_UNI 0
140 #define RX_MODE_MULTI 1
141 #define RX_MODE_ALL_MULTI 2
142 #define RX_MODE_PROMISC 3
143         struct work_struct set_multicast_list_wq;
144         struct work_struct restart_net_feed_wq;
145         unsigned char feedtype;                 /* Either FEED_TYPE_ or FEED_TYPE_ULE */
146         int need_pusi;                          /* Set to 1, if synchronization on PUSI required. */
147         unsigned char tscc;                     /* TS continuity counter after sync on PUSI. */
148         struct sk_buff *ule_skb;                /* ULE SNDU decodes into this buffer. */
149         unsigned char *ule_next_hdr;            /* Pointer into skb to next ULE extension header. */
150         unsigned short ule_sndu_len;            /* ULE SNDU length in bytes, w/o D-Bit. */
151         unsigned short ule_sndu_type;           /* ULE SNDU type field, complete. */
152         unsigned char ule_sndu_type_1;          /* ULE SNDU type field, if split across 2 TS cells. */
153         unsigned char ule_dbit;                 /* Whether the DestMAC address present
154                                                  * or not (bit is set). */
155         unsigned char ule_bridged;              /* Whether the ULE_BRIDGED extension header was found. */
156         int ule_sndu_remain;                    /* Nr. of bytes still required for current ULE SNDU. */
157         unsigned long ts_count;                 /* Current ts cell counter. */
158         struct mutex mutex;
159 };
160
161
162 /**
163  *      Determine the packet's protocol ID. The rule here is that we
164  *      assume 802.3 if the type field is short enough to be a length.
165  *      This is normal practice and works for any 'now in use' protocol.
166  *
167  *  stolen from eth.c out of the linux kernel, hacked for dvb-device
168  *  by Michael Holzt <kju@debian.org>
169  */
170 static __be16 dvb_net_eth_type_trans(struct sk_buff *skb,
171                                       struct net_device *dev)
172 {
173         struct ethhdr *eth;
174         unsigned char *rawp;
175
176         skb_reset_mac_header(skb);
177         skb_pull(skb,dev->hard_header_len);
178         eth = eth_hdr(skb);
179
180         if (*eth->h_dest & 1) {
181                 if(memcmp(eth->h_dest,dev->broadcast, ETH_ALEN)==0)
182                         skb->pkt_type=PACKET_BROADCAST;
183                 else
184                         skb->pkt_type=PACKET_MULTICAST;
185         }
186
187         if (ntohs(eth->h_proto) >= 1536)
188                 return eth->h_proto;
189
190         rawp = skb->data;
191
192         /**
193          *      This is a magic hack to spot IPX packets. Older Novell breaks
194          *      the protocol design and runs IPX over 802.3 without an 802.2 LLC
195          *      layer. We look for FFFF which isn't a used 802.2 SSAP/DSAP. This
196          *      won't work for fault tolerant netware but does for the rest.
197          */
198         if (*(unsigned short *)rawp == 0xFFFF)
199                 return htons(ETH_P_802_3);
200
201         /**
202          *      Real 802.2 LLC
203          */
204         return htons(ETH_P_802_2);
205 }
206
207 #define TS_SZ   188
208 #define TS_SYNC 0x47
209 #define TS_TEI  0x80
210 #define TS_SC   0xC0
211 #define TS_PUSI 0x40
212 #define TS_AF_A 0x20
213 #define TS_AF_D 0x10
214
215 /* ULE Extension Header handlers. */
216
217 #define ULE_TEST        0
218 #define ULE_BRIDGED     1
219
220 #define ULE_OPTEXTHDR_PADDING 0
221
222 static int ule_test_sndu( struct dvb_net_priv *p )
223 {
224         return -1;
225 }
226
227 static int ule_bridged_sndu( struct dvb_net_priv *p )
228 {
229         struct ethhdr *hdr = (struct ethhdr*) p->ule_next_hdr;
230         if(ntohs(hdr->h_proto) < 1536) {
231                 int framelen = p->ule_sndu_len - ((p->ule_next_hdr+sizeof(struct ethhdr)) - p->ule_skb->data);
232                 /* A frame Type < 1536 for a bridged frame, introduces a LLC Length field. */
233                 if(framelen != ntohs(hdr->h_proto)) {
234                         return -1;
235                 }
236         }
237         /* Note:
238          * From RFC4326:
239          *  "A bridged SNDU is a Mandatory Extension Header of Type 1.
240          *   It must be the final (or only) extension header specified in the header chain of a SNDU."
241          * The 'ule_bridged' flag will cause the extension header processing loop to terminate.
242          */
243         p->ule_bridged = 1;
244         return 0;
245 }
246
247 static int ule_exthdr_padding(struct dvb_net_priv *p)
248 {
249         return 0;
250 }
251
252 /** Handle ULE extension headers.
253  *  Function is called after a successful CRC32 verification of an ULE SNDU to complete its decoding.
254  *  Returns: >= 0: nr. of bytes consumed by next extension header
255  *           -1:   Mandatory extension header that is not recognized or TEST SNDU; discard.
256  */
257 static int handle_one_ule_extension( struct dvb_net_priv *p )
258 {
259         /* Table of mandatory extension header handlers.  The header type is the index. */
260         static int (*ule_mandatory_ext_handlers[255])( struct dvb_net_priv *p ) =
261                 { [0] = ule_test_sndu, [1] = ule_bridged_sndu, [2] = NULL,  };
262
263         /* Table of optional extension header handlers.  The header type is the index. */
264         static int (*ule_optional_ext_handlers[255])( struct dvb_net_priv *p ) =
265                 { [0] = ule_exthdr_padding, [1] = NULL, };
266
267         int ext_len = 0;
268         unsigned char hlen = (p->ule_sndu_type & 0x0700) >> 8;
269         unsigned char htype = p->ule_sndu_type & 0x00FF;
270
271         /* Discriminate mandatory and optional extension headers. */
272         if (hlen == 0) {
273                 /* Mandatory extension header */
274                 if (ule_mandatory_ext_handlers[htype]) {
275                         ext_len = ule_mandatory_ext_handlers[htype]( p );
276                         if(ext_len >= 0) {
277                                 p->ule_next_hdr += ext_len;
278                                 if (!p->ule_bridged) {
279                                         p->ule_sndu_type = ntohs(*(__be16 *)p->ule_next_hdr);
280                                         p->ule_next_hdr += 2;
281                                 } else {
282                                         p->ule_sndu_type = ntohs(*(__be16 *)(p->ule_next_hdr + ((p->ule_dbit ? 2 : 3) * ETH_ALEN)));
283                                         /* This assures the extension handling loop will terminate. */
284                                 }
285                         }
286                         // else: extension handler failed or SNDU should be discarded
287                 } else
288                         ext_len = -1;   /* SNDU has to be discarded. */
289         } else {
290                 /* Optional extension header.  Calculate the length. */
291                 ext_len = hlen << 1;
292                 /* Process the optional extension header according to its type. */
293                 if (ule_optional_ext_handlers[htype])
294                         (void)ule_optional_ext_handlers[htype]( p );
295                 p->ule_next_hdr += ext_len;
296                 p->ule_sndu_type = ntohs( *(__be16 *)(p->ule_next_hdr-2) );
297                 /*
298                  * note: the length of the next header type is included in the
299                  * length of THIS optional extension header
300                  */
301         }
302
303         return ext_len;
304 }
305
306 static int handle_ule_extensions( struct dvb_net_priv *p )
307 {
308         int total_ext_len = 0, l;
309
310         p->ule_next_hdr = p->ule_skb->data;
311         do {
312                 l = handle_one_ule_extension( p );
313                 if (l < 0)
314                         return l;       /* Stop extension header processing and discard SNDU. */
315                 total_ext_len += l;
316 #ifdef ULE_DEBUG
317                 dprintk("handle_ule_extensions: ule_next_hdr=%p, ule_sndu_type=%i, "
318                         "l=%i, total_ext_len=%i\n", p->ule_next_hdr,
319                         (int) p->ule_sndu_type, l, total_ext_len);
320 #endif
321
322         } while (p->ule_sndu_type < 1536);
323
324         return total_ext_len;
325 }
326
327
328 /** Prepare for a new ULE SNDU: reset the decoder state. */
329 static inline void reset_ule( struct dvb_net_priv *p )
330 {
331         p->ule_skb = NULL;
332         p->ule_next_hdr = NULL;
333         p->ule_sndu_len = 0;
334         p->ule_sndu_type = 0;
335         p->ule_sndu_type_1 = 0;
336         p->ule_sndu_remain = 0;
337         p->ule_dbit = 0xFF;
338         p->ule_bridged = 0;
339 }
340
341 /**
342  * Decode ULE SNDUs according to draft-ietf-ipdvb-ule-03.txt from a sequence of
343  * TS cells of a single PID.
344  */
345 static void dvb_net_ule( struct net_device *dev, const u8 *buf, size_t buf_len )
346 {
347         struct dvb_net_priv *priv = netdev_priv(dev);
348         unsigned long skipped = 0L;
349         const u8 *ts, *ts_end, *from_where = NULL;
350         u8 ts_remain = 0, how_much = 0, new_ts = 1;
351         struct ethhdr *ethh = NULL;
352
353 #ifdef ULE_DEBUG
354         /* The code inside ULE_DEBUG keeps a history of the last 100 TS cells processed. */
355         static unsigned char ule_hist[100*TS_SZ];
356         static unsigned char *ule_where = ule_hist, ule_dump;
357 #endif
358
359         /* For all TS cells in current buffer.
360          * Appearently, we are called for every single TS cell.
361          */
362         for (ts = buf, ts_end = buf + buf_len; ts < ts_end; /* no default incr. */ ) {
363
364                 if (new_ts) {
365                         /* We are about to process a new TS cell. */
366
367 #ifdef ULE_DEBUG
368                         if (ule_where >= &ule_hist[100*TS_SZ]) ule_where = ule_hist;
369                         memcpy( ule_where, ts, TS_SZ );
370                         if (ule_dump) {
371                                 hexdump( ule_where, TS_SZ );
372                                 ule_dump = 0;
373                         }
374                         ule_where += TS_SZ;
375 #endif
376
377                         /* Check TS error conditions: sync_byte, transport_error_indicator, scrambling_control . */
378                         if ((ts[0] != TS_SYNC) || (ts[1] & TS_TEI) || ((ts[3] & TS_SC) != 0)) {
379                                 printk(KERN_WARNING "%lu: Invalid TS cell: SYNC %#x, TEI %u, SC %#x.\n",
380                                        priv->ts_count, ts[0], ts[1] & TS_TEI >> 7, ts[3] & 0xC0 >> 6);
381
382                                 /* Drop partly decoded SNDU, reset state, resync on PUSI. */
383                                 if (priv->ule_skb) {
384                                         dev_kfree_skb( priv->ule_skb );
385                                         /* Prepare for next SNDU. */
386                                         dev->stats.rx_errors++;
387                                         dev->stats.rx_frame_errors++;
388                                 }
389                                 reset_ule(priv);
390                                 priv->need_pusi = 1;
391
392                                 /* Continue with next TS cell. */
393                                 ts += TS_SZ;
394                                 priv->ts_count++;
395                                 continue;
396                         }
397
398                         ts_remain = 184;
399                         from_where = ts + 4;
400                 }
401                 /* Synchronize on PUSI, if required. */
402                 if (priv->need_pusi) {
403                         if (ts[1] & TS_PUSI) {
404                                 /* Find beginning of first ULE SNDU in current TS cell. */
405                                 /* Synchronize continuity counter. */
406                                 priv->tscc = ts[3] & 0x0F;
407                                 /* There is a pointer field here. */
408                                 if (ts[4] > ts_remain) {
409                                         printk(KERN_ERR "%lu: Invalid ULE packet "
410                                                "(pointer field %d)\n", priv->ts_count, ts[4]);
411                                         ts += TS_SZ;
412                                         priv->ts_count++;
413                                         continue;
414                                 }
415                                 /* Skip to destination of pointer field. */
416                                 from_where = &ts[5] + ts[4];
417                                 ts_remain -= 1 + ts[4];
418                                 skipped = 0;
419                         } else {
420                                 skipped++;
421                                 ts += TS_SZ;
422                                 priv->ts_count++;
423                                 continue;
424                         }
425                 }
426
427                 if (new_ts) {
428                         /* Check continuity counter. */
429                         if ((ts[3] & 0x0F) == priv->tscc)
430                                 priv->tscc = (priv->tscc + 1) & 0x0F;
431                         else {
432                                 /* TS discontinuity handling: */
433                                 printk(KERN_WARNING "%lu: TS discontinuity: got %#x, "
434                                        "expected %#x.\n", priv->ts_count, ts[3] & 0x0F, priv->tscc);
435                                 /* Drop partly decoded SNDU, reset state, resync on PUSI. */
436                                 if (priv->ule_skb) {
437                                         dev_kfree_skb( priv->ule_skb );
438                                         /* Prepare for next SNDU. */
439                                         // reset_ule(priv);  moved to below.
440                                         dev->stats.rx_errors++;
441                                         dev->stats.rx_frame_errors++;
442                                 }
443                                 reset_ule(priv);
444                                 /* skip to next PUSI. */
445                                 priv->need_pusi = 1;
446                                 continue;
447                         }
448                         /* If we still have an incomplete payload, but PUSI is
449                          * set; some TS cells are missing.
450                          * This is only possible here, if we missed exactly 16 TS
451                          * cells (continuity counter wrap). */
452                         if (ts[1] & TS_PUSI) {
453                                 if (! priv->need_pusi) {
454                                         if (!(*from_where < (ts_remain-1)) || *from_where != priv->ule_sndu_remain) {
455                                                 /* Pointer field is invalid.  Drop this TS cell and any started ULE SNDU. */
456                                                 printk(KERN_WARNING "%lu: Invalid pointer "
457                                                        "field: %u.\n", priv->ts_count, *from_where);
458
459                                                 /* Drop partly decoded SNDU, reset state, resync on PUSI. */
460                                                 if (priv->ule_skb) {
461                                                         dev_kfree_skb( priv->ule_skb );
462                                                         dev->stats.rx_errors++;
463                                                         dev->stats.rx_frame_errors++;
464                                                 }
465                                                 reset_ule(priv);
466                                                 priv->need_pusi = 1;
467                                                 continue;
468                                         }
469                                         /* Skip pointer field (we're processing a
470                                          * packed payload). */
471                                         from_where += 1;
472                                         ts_remain -= 1;
473                                 } else
474                                         priv->need_pusi = 0;
475
476                                 if (priv->ule_sndu_remain > 183) {
477                                         /* Current SNDU lacks more data than there could be available in the
478                                          * current TS cell. */
479                                         dev->stats.rx_errors++;
480                                         dev->stats.rx_length_errors++;
481                                         printk(KERN_WARNING "%lu: Expected %d more SNDU bytes, but "
482                                                "got PUSI (pf %d, ts_remain %d).  Flushing incomplete payload.\n",
483                                                priv->ts_count, priv->ule_sndu_remain, ts[4], ts_remain);
484                                         dev_kfree_skb(priv->ule_skb);
485                                         /* Prepare for next SNDU. */
486                                         reset_ule(priv);
487                                         /* Resync: go to where pointer field points to: start of next ULE SNDU. */
488                                         from_where += ts[4];
489                                         ts_remain -= ts[4];
490                                 }
491                         }
492                 }
493
494                 /* Check if new payload needs to be started. */
495                 if (priv->ule_skb == NULL) {
496                         /* Start a new payload with skb.
497                          * Find ULE header.  It is only guaranteed that the
498                          * length field (2 bytes) is contained in the current
499                          * TS.
500                          * Check ts_remain has to be >= 2 here. */
501                         if (ts_remain < 2) {
502                                 printk(KERN_WARNING "Invalid payload packing: only %d "
503                                        "bytes left in TS.  Resyncing.\n", ts_remain);
504                                 priv->ule_sndu_len = 0;
505                                 priv->need_pusi = 1;
506                                 continue;
507                         }
508
509                         if (! priv->ule_sndu_len) {
510                                 /* Got at least two bytes, thus extrace the SNDU length. */
511                                 priv->ule_sndu_len = from_where[0] << 8 | from_where[1];
512                                 if (priv->ule_sndu_len & 0x8000) {
513                                         /* D-Bit is set: no dest mac present. */
514                                         priv->ule_sndu_len &= 0x7FFF;
515                                         priv->ule_dbit = 1;
516                                 } else
517                                         priv->ule_dbit = 0;
518
519                                 if (priv->ule_sndu_len < 5) {
520                                         printk(KERN_WARNING "%lu: Invalid ULE SNDU length %u. "
521                                                "Resyncing.\n", priv->ts_count, priv->ule_sndu_len);
522                                         dev->stats.rx_errors++;
523                                         dev->stats.rx_length_errors++;
524                                         priv->ule_sndu_len = 0;
525                                         priv->need_pusi = 1;
526                                         new_ts = 1;
527                                         ts += TS_SZ;
528                                         priv->ts_count++;
529                                         continue;
530                                 }
531                                 ts_remain -= 2; /* consume the 2 bytes SNDU length. */
532                                 from_where += 2;
533                         }
534
535                         /*
536                          * State of current TS:
537                          *   ts_remain (remaining bytes in the current TS cell)
538                          *   0  ule_type is not available now, we need the next TS cell
539                          *   1  the first byte of the ule_type is present
540                          * >=2  full ULE header present, maybe some payload data as well.
541                          */
542                         switch (ts_remain) {
543                                 case 1:
544                                         priv->ule_sndu_type = from_where[0] << 8;
545                                         priv->ule_sndu_type_1 = 1; /* first byte of ule_type is set. */
546                                         ts_remain -= 1; from_where += 1;
547                                         /* Continue w/ next TS. */
548                                 case 0:
549                                         new_ts = 1;
550                                         ts += TS_SZ;
551                                         priv->ts_count++;
552                                         continue;
553
554                                 default: /* complete ULE header is present in current TS. */
555                                         /* Extract ULE type field. */
556                                         if (priv->ule_sndu_type_1) {
557                                                 priv->ule_sndu_type |= from_where[0];
558                                                 from_where += 1; /* points to payload start. */
559                                                 ts_remain -= 1;
560                                         } else {
561                                                 /* Complete type is present in new TS. */
562                                                 priv->ule_sndu_type = from_where[0] << 8 | from_where[1];
563                                                 from_where += 2; /* points to payload start. */
564                                                 ts_remain -= 2;
565                                         }
566                                         break;
567                         }
568
569                         /* Allocate the skb (decoder target buffer) with the correct size, as follows:
570                          * prepare for the largest case: bridged SNDU with MAC address (dbit = 0). */
571                         priv->ule_skb = dev_alloc_skb( priv->ule_sndu_len + ETH_HLEN + ETH_ALEN );
572                         if (priv->ule_skb == NULL) {
573                                 printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n",
574                                        dev->name);
575                                 dev->stats.rx_dropped++;
576                                 return;
577                         }
578
579                         /* This includes the CRC32 _and_ dest mac, if !dbit. */
580                         priv->ule_sndu_remain = priv->ule_sndu_len;
581                         priv->ule_skb->dev = dev;
582                         /* Leave space for Ethernet or bridged SNDU header (eth hdr plus one MAC addr). */
583                         skb_reserve( priv->ule_skb, ETH_HLEN + ETH_ALEN );
584                 }
585
586                 /* Copy data into our current skb. */
587                 how_much = min(priv->ule_sndu_remain, (int)ts_remain);
588                 memcpy(skb_put(priv->ule_skb, how_much), from_where, how_much);
589                 priv->ule_sndu_remain -= how_much;
590                 ts_remain -= how_much;
591                 from_where += how_much;
592
593                 /* Check for complete payload. */
594                 if (priv->ule_sndu_remain <= 0) {
595                         /* Check CRC32, we've got it in our skb already. */
596                         __be16 ulen = htons(priv->ule_sndu_len);
597                         __be16 utype = htons(priv->ule_sndu_type);
598                         const u8 *tail;
599                         struct kvec iov[3] = {
600                                 { &ulen, sizeof ulen },
601                                 { &utype, sizeof utype },
602                                 { priv->ule_skb->data, priv->ule_skb->len - 4 }
603                         };
604                         u32 ule_crc = ~0L, expected_crc;
605                         if (priv->ule_dbit) {
606                                 /* Set D-bit for CRC32 verification,
607                                  * if it was set originally. */
608                                 ulen |= htons(0x8000);
609                         }
610
611                         ule_crc = iov_crc32(ule_crc, iov, 3);
612                         tail = skb_tail_pointer(priv->ule_skb);
613                         expected_crc = *(tail - 4) << 24 |
614                                        *(tail - 3) << 16 |
615                                        *(tail - 2) << 8 |
616                                        *(tail - 1);
617                         if (ule_crc != expected_crc) {
618                                 printk(KERN_WARNING "%lu: CRC32 check FAILED: %08x / %08x, SNDU len %d type %#x, ts_remain %d, next 2: %x.\n",
619                                        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);
620
621 #ifdef ULE_DEBUG
622                                 hexdump( iov[0].iov_base, iov[0].iov_len );
623                                 hexdump( iov[1].iov_base, iov[1].iov_len );
624                                 hexdump( iov[2].iov_base, iov[2].iov_len );
625
626                                 if (ule_where == ule_hist) {
627                                         hexdump( &ule_hist[98*TS_SZ], TS_SZ );
628                                         hexdump( &ule_hist[99*TS_SZ], TS_SZ );
629                                 } else if (ule_where == &ule_hist[TS_SZ]) {
630                                         hexdump( &ule_hist[99*TS_SZ], TS_SZ );
631                                         hexdump( ule_hist, TS_SZ );
632                                 } else {
633                                         hexdump( ule_where - TS_SZ - TS_SZ, TS_SZ );
634                                         hexdump( ule_where - TS_SZ, TS_SZ );
635                                 }
636                                 ule_dump = 1;
637 #endif
638
639                                 dev->stats.rx_errors++;
640                                 dev->stats.rx_crc_errors++;
641                                 dev_kfree_skb(priv->ule_skb);
642                         } else {
643                                 /* CRC32 verified OK. */
644                                 u8 dest_addr[ETH_ALEN];
645                                 static const u8 bc_addr[ETH_ALEN] =
646                                         { [ 0 ... ETH_ALEN-1] = 0xff };
647
648                                 /* CRC32 was OK. Remove it from skb. */
649                                 priv->ule_skb->tail -= 4;
650                                 priv->ule_skb->len -= 4;
651
652                                 if (!priv->ule_dbit) {
653                                         /*
654                                          * The destination MAC address is the
655                                          * next data in the skb.  It comes
656                                          * before any extension headers.
657                                          *
658                                          * Check if the payload of this SNDU
659                                          * should be passed up the stack.
660                                          */
661                                         register int drop = 0;
662                                         if (priv->rx_mode != RX_MODE_PROMISC) {
663                                                 if (priv->ule_skb->data[0] & 0x01) {
664                                                         /* multicast or broadcast */
665                                                         if (memcmp(priv->ule_skb->data, bc_addr, ETH_ALEN)) {
666                                                                 /* multicast */
667                                                                 if (priv->rx_mode == RX_MODE_MULTI) {
668                                                                         int i;
669                                                                         for(i = 0; i < priv->multi_num && memcmp(priv->ule_skb->data, priv->multi_macs[i], ETH_ALEN); i++)
670                                                                                 ;
671                                                                         if (i == priv->multi_num)
672                                                                                 drop = 1;
673                                                                 } else if (priv->rx_mode != RX_MODE_ALL_MULTI)
674                                                                         drop = 1; /* no broadcast; */
675                                                                 /* else: all multicast mode: accept all multicast packets */
676                                                         }
677                                                         /* else: broadcast */
678                                                 }
679                                                 else if (memcmp(priv->ule_skb->data, dev->dev_addr, ETH_ALEN))
680                                                         drop = 1;
681                                                 /* else: destination address matches the MAC address of our receiver device */
682                                         }
683                                         /* else: promiscuous mode; pass everything up the stack */
684
685                                         if (drop) {
686 #ifdef ULE_DEBUG
687                                                 dprintk("Dropping SNDU: MAC destination address does not match: dest addr: "MAC_ADDR_PRINTFMT", dev addr: "MAC_ADDR_PRINTFMT"\n",
688                                                         MAX_ADDR_PRINTFMT_ARGS(priv->ule_skb->data), MAX_ADDR_PRINTFMT_ARGS(dev->dev_addr));
689 #endif
690                                                 dev_kfree_skb(priv->ule_skb);
691                                                 goto sndu_done;
692                                         }
693                                         else
694                                         {
695                                                 skb_copy_from_linear_data(priv->ule_skb,
696                                                               dest_addr,
697                                                               ETH_ALEN);
698                                                 skb_pull(priv->ule_skb, ETH_ALEN);
699                                         }
700                                 }
701
702                                 /* Handle ULE Extension Headers. */
703                                 if (priv->ule_sndu_type < 1536) {
704                                         /* There is an extension header.  Handle it accordingly. */
705                                         int l = handle_ule_extensions(priv);
706                                         if (l < 0) {
707                                                 /* Mandatory extension header unknown or TEST SNDU.  Drop it. */
708                                                 // printk( KERN_WARNING "Dropping SNDU, extension headers.\n" );
709                                                 dev_kfree_skb(priv->ule_skb);
710                                                 goto sndu_done;
711                                         }
712                                         skb_pull(priv->ule_skb, l);
713                                 }
714
715                                 /*
716                                  * Construct/assure correct ethernet header.
717                                  * Note: in bridged mode (priv->ule_bridged !=
718                                  * 0) we already have the (original) ethernet
719                                  * header at the start of the payload (after
720                                  * optional dest. address and any extension
721                                  * headers).
722                                  */
723
724                                 if (!priv->ule_bridged) {
725                                         skb_push(priv->ule_skb, ETH_HLEN);
726                                         ethh = (struct ethhdr *)priv->ule_skb->data;
727                                         if (!priv->ule_dbit) {
728                                                  /* dest_addr buffer is only valid if priv->ule_dbit == 0 */
729                                                 memcpy(ethh->h_dest, dest_addr, ETH_ALEN);
730                                                 memset(ethh->h_source, 0, ETH_ALEN);
731                                         }
732                                         else /* zeroize source and dest */
733                                                 memset( ethh, 0, ETH_ALEN*2 );
734
735                                         ethh->h_proto = htons(priv->ule_sndu_type);
736                                 }
737                                 /* else:  skb is in correct state; nothing to do. */
738                                 priv->ule_bridged = 0;
739
740                                 /* Stuff into kernel's protocol stack. */
741                                 priv->ule_skb->protocol = dvb_net_eth_type_trans(priv->ule_skb, dev);
742                                 /* If D-bit is set (i.e. destination MAC address not present),
743                                  * receive the packet anyhow. */
744                                 /* if (priv->ule_dbit && skb->pkt_type == PACKET_OTHERHOST)
745                                         priv->ule_skb->pkt_type = PACKET_HOST; */
746                                 dev->stats.rx_packets++;
747                                 dev->stats.rx_bytes += priv->ule_skb->len;
748                                 netif_rx(priv->ule_skb);
749                         }
750                         sndu_done:
751                         /* Prepare for next SNDU. */
752                         reset_ule(priv);
753                 }
754
755                 /* More data in current TS (look at the bytes following the CRC32)? */
756                 if (ts_remain >= 2 && *((unsigned short *)from_where) != 0xFFFF) {
757                         /* Next ULE SNDU starts right there. */
758                         new_ts = 0;
759                         priv->ule_skb = NULL;
760                         priv->ule_sndu_type_1 = 0;
761                         priv->ule_sndu_len = 0;
762                         // printk(KERN_WARNING "More data in current TS: [%#x %#x %#x %#x]\n",
763                         //      *(from_where + 0), *(from_where + 1),
764                         //      *(from_where + 2), *(from_where + 3));
765                         // printk(KERN_WARNING "ts @ %p, stopped @ %p:\n", ts, from_where + 0);
766                         // hexdump(ts, 188);
767                 } else {
768                         new_ts = 1;
769                         ts += TS_SZ;
770                         priv->ts_count++;
771                         if (priv->ule_skb == NULL) {
772                                 priv->need_pusi = 1;
773                                 priv->ule_sndu_type_1 = 0;
774                                 priv->ule_sndu_len = 0;
775                         }
776                 }
777         }       /* for all available TS cells */
778 }
779
780 static int dvb_net_ts_callback(const u8 *buffer1, size_t buffer1_len,
781                                const u8 *buffer2, size_t buffer2_len,
782                                struct dmx_ts_feed *feed, enum dmx_success success)
783 {
784         struct net_device *dev = feed->priv;
785
786         if (buffer2)
787                 printk(KERN_WARNING "buffer2 not NULL: %p.\n", buffer2);
788         if (buffer1_len > 32768)
789                 printk(KERN_WARNING "length > 32k: %zu.\n", buffer1_len);
790         /* printk("TS callback: %u bytes, %u TS cells @ %p.\n",
791                   buffer1_len, buffer1_len / TS_SZ, buffer1); */
792         dvb_net_ule(dev, buffer1, buffer1_len);
793         return 0;
794 }
795
796
797 static void dvb_net_sec(struct net_device *dev,
798                         const u8 *pkt, int pkt_len)
799 {
800         u8 *eth;
801         struct sk_buff *skb;
802         struct net_device_stats *stats = &dev->stats;
803         int snap = 0;
804
805         /* note: pkt_len includes a 32bit checksum */
806         if (pkt_len < 16) {
807                 printk("%s: IP/MPE packet length = %d too small.\n",
808                         dev->name, pkt_len);
809                 stats->rx_errors++;
810                 stats->rx_length_errors++;
811                 return;
812         }
813 /* it seems some ISPs manage to screw up here, so we have to
814  * relax the error checks... */
815 #if 0
816         if ((pkt[5] & 0xfd) != 0xc1) {
817                 /* drop scrambled or broken packets */
818 #else
819         if ((pkt[5] & 0x3c) != 0x00) {
820                 /* drop scrambled */
821 #endif
822                 stats->rx_errors++;
823                 stats->rx_crc_errors++;
824                 return;
825         }
826         if (pkt[5] & 0x02) {
827                 /* handle LLC/SNAP, see rfc-1042 */
828                 if (pkt_len < 24 || memcmp(&pkt[12], "\xaa\xaa\x03\0\0\0", 6)) {
829                         stats->rx_dropped++;
830                         return;
831                 }
832                 snap = 8;
833         }
834         if (pkt[7]) {
835                 /* FIXME: assemble datagram from multiple sections */
836                 stats->rx_errors++;
837                 stats->rx_frame_errors++;
838                 return;
839         }
840
841         /* we have 14 byte ethernet header (ip header follows);
842          * 12 byte MPE header; 4 byte checksum; + 2 byte alignment, 8 byte LLC/SNAP
843          */
844         if (!(skb = dev_alloc_skb(pkt_len - 4 - 12 + 14 + 2 - snap))) {
845                 //printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n", dev->name);
846                 stats->rx_dropped++;
847                 return;
848         }
849         skb_reserve(skb, 2);    /* longword align L3 header */
850         skb->dev = dev;
851
852         /* copy L3 payload */
853         eth = (u8 *) skb_put(skb, pkt_len - 12 - 4 + 14 - snap);
854         memcpy(eth + 14, pkt + 12 + snap, pkt_len - 12 - 4 - snap);
855
856         /* create ethernet header: */
857         eth[0]=pkt[0x0b];
858         eth[1]=pkt[0x0a];
859         eth[2]=pkt[0x09];
860         eth[3]=pkt[0x08];
861         eth[4]=pkt[0x04];
862         eth[5]=pkt[0x03];
863
864         eth[6]=eth[7]=eth[8]=eth[9]=eth[10]=eth[11]=0;
865
866         if (snap) {
867                 eth[12] = pkt[18];
868                 eth[13] = pkt[19];
869         } else {
870                 /* protocol numbers are from rfc-1700 or
871                  * http://www.iana.org/assignments/ethernet-numbers
872                  */
873                 if (pkt[12] >> 4 == 6) { /* version field from IP header */
874                         eth[12] = 0x86; /* IPv6 */
875                         eth[13] = 0xdd;
876                 } else {
877                         eth[12] = 0x08; /* IPv4 */
878                         eth[13] = 0x00;
879                 }
880         }
881
882         skb->protocol = dvb_net_eth_type_trans(skb, dev);
883
884         stats->rx_packets++;
885         stats->rx_bytes+=skb->len;
886         netif_rx(skb);
887 }
888
889 static int dvb_net_sec_callback(const u8 *buffer1, size_t buffer1_len,
890                  const u8 *buffer2, size_t buffer2_len,
891                  struct dmx_section_filter *filter,
892                  enum dmx_success success)
893 {
894         struct net_device *dev = filter->priv;
895
896         /**
897          * we rely on the DVB API definition where exactly one complete
898          * section is delivered in buffer1
899          */
900         dvb_net_sec (dev, buffer1, buffer1_len);
901         return 0;
902 }
903
904 static int dvb_net_tx(struct sk_buff *skb, struct net_device *dev)
905 {
906         dev_kfree_skb(skb);
907         return 0;
908 }
909
910 static u8 mask_normal[6]={0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
911 static u8 mask_allmulti[6]={0xff, 0xff, 0xff, 0x00, 0x00, 0x00};
912 static u8 mac_allmulti[6]={0x01, 0x00, 0x5e, 0x00, 0x00, 0x00};
913 static u8 mask_promisc[6]={0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
914
915 static int dvb_net_filter_sec_set(struct net_device *dev,
916                    struct dmx_section_filter **secfilter,
917                    u8 *mac, u8 *mac_mask)
918 {
919         struct dvb_net_priv *priv = netdev_priv(dev);
920         int ret;
921
922         *secfilter=NULL;
923         ret = priv->secfeed->allocate_filter(priv->secfeed, secfilter);
924         if (ret<0) {
925                 printk("%s: could not get filter\n", dev->name);
926                 return ret;
927         }
928
929         (*secfilter)->priv=(void *) dev;
930
931         memset((*secfilter)->filter_value, 0x00, DMX_MAX_FILTER_SIZE);
932         memset((*secfilter)->filter_mask,  0x00, DMX_MAX_FILTER_SIZE);
933         memset((*secfilter)->filter_mode,  0xff, DMX_MAX_FILTER_SIZE);
934
935         (*secfilter)->filter_value[0]=0x3e;
936         (*secfilter)->filter_value[3]=mac[5];
937         (*secfilter)->filter_value[4]=mac[4];
938         (*secfilter)->filter_value[8]=mac[3];
939         (*secfilter)->filter_value[9]=mac[2];
940         (*secfilter)->filter_value[10]=mac[1];
941         (*secfilter)->filter_value[11]=mac[0];
942
943         (*secfilter)->filter_mask[0] = 0xff;
944         (*secfilter)->filter_mask[3] = mac_mask[5];
945         (*secfilter)->filter_mask[4] = mac_mask[4];
946         (*secfilter)->filter_mask[8] = mac_mask[3];
947         (*secfilter)->filter_mask[9] = mac_mask[2];
948         (*secfilter)->filter_mask[10] = mac_mask[1];
949         (*secfilter)->filter_mask[11]=mac_mask[0];
950
951         dprintk("%s: filter mac=%02x %02x %02x %02x %02x %02x\n",
952                dev->name, mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
953         dprintk("%s: filter mask=%02x %02x %02x %02x %02x %02x\n",
954                dev->name, mac_mask[0], mac_mask[1], mac_mask[2],
955                mac_mask[3], mac_mask[4], mac_mask[5]);
956
957         return 0;
958 }
959
960 static int dvb_net_feed_start(struct net_device *dev)
961 {
962         int ret = 0, i;
963         struct dvb_net_priv *priv = netdev_priv(dev);
964         struct dmx_demux *demux = priv->demux;
965         unsigned char *mac = (unsigned char *) dev->dev_addr;
966
967         dprintk("%s: rx_mode %i\n", __func__, priv->rx_mode);
968         mutex_lock(&priv->mutex);
969         if (priv->tsfeed || priv->secfeed || priv->secfilter || priv->multi_secfilter[0])
970                 printk("%s: BUG %d\n", __func__, __LINE__);
971
972         priv->secfeed=NULL;
973         priv->secfilter=NULL;
974         priv->tsfeed = NULL;
975
976         if (priv->feedtype == DVB_NET_FEEDTYPE_MPE) {
977                 dprintk("%s: alloc secfeed\n", __func__);
978                 ret=demux->allocate_section_feed(demux, &priv->secfeed,
979                                          dvb_net_sec_callback);
980                 if (ret<0) {
981                         printk("%s: could not allocate section feed\n", dev->name);
982                         goto error;
983                 }
984
985                 ret = priv->secfeed->set(priv->secfeed, priv->pid, 32768, 1);
986
987                 if (ret<0) {
988                         printk("%s: could not set section feed\n", dev->name);
989                         priv->demux->release_section_feed(priv->demux, priv->secfeed);
990                         priv->secfeed=NULL;
991                         goto error;
992                 }
993
994                 if (priv->rx_mode != RX_MODE_PROMISC) {
995                         dprintk("%s: set secfilter\n", __func__);
996                         dvb_net_filter_sec_set(dev, &priv->secfilter, mac, mask_normal);
997                 }
998
999                 switch (priv->rx_mode) {
1000                 case RX_MODE_MULTI:
1001                         for (i = 0; i < priv->multi_num; i++) {
1002                                 dprintk("%s: set multi_secfilter[%d]\n", __func__, i);
1003                                 dvb_net_filter_sec_set(dev, &priv->multi_secfilter[i],
1004                                                        priv->multi_macs[i], mask_normal);
1005                         }
1006                         break;
1007                 case RX_MODE_ALL_MULTI:
1008                         priv->multi_num=1;
1009                         dprintk("%s: set multi_secfilter[0]\n", __func__);
1010                         dvb_net_filter_sec_set(dev, &priv->multi_secfilter[0],
1011                                                mac_allmulti, mask_allmulti);
1012                         break;
1013                 case RX_MODE_PROMISC:
1014                         priv->multi_num=0;
1015                         dprintk("%s: set secfilter\n", __func__);
1016                         dvb_net_filter_sec_set(dev, &priv->secfilter, mac, mask_promisc);
1017                         break;
1018                 }
1019
1020                 dprintk("%s: start filtering\n", __func__);
1021                 priv->secfeed->start_filtering(priv->secfeed);
1022         } else if (priv->feedtype == DVB_NET_FEEDTYPE_ULE) {
1023                 struct timespec timeout = { 0, 10000000 }; // 10 msec
1024
1025                 /* we have payloads encapsulated in TS */
1026                 dprintk("%s: alloc tsfeed\n", __func__);
1027                 ret = demux->allocate_ts_feed(demux, &priv->tsfeed, dvb_net_ts_callback);
1028                 if (ret < 0) {
1029                         printk("%s: could not allocate ts feed\n", dev->name);
1030                         goto error;
1031                 }
1032
1033                 /* Set netdevice pointer for ts decaps callback. */
1034                 priv->tsfeed->priv = (void *)dev;
1035                 ret = priv->tsfeed->set(priv->tsfeed,
1036                                         priv->pid, /* pid */
1037                                         TS_PACKET, /* type */
1038                                         DMX_TS_PES_OTHER, /* pes type */
1039                                         32768,     /* circular buffer size */
1040                                         timeout    /* timeout */
1041                                         );
1042
1043                 if (ret < 0) {
1044                         printk("%s: could not set ts feed\n", dev->name);
1045                         priv->demux->release_ts_feed(priv->demux, priv->tsfeed);
1046                         priv->tsfeed = NULL;
1047                         goto error;
1048                 }
1049
1050                 dprintk("%s: start filtering\n", __func__);
1051                 priv->tsfeed->start_filtering(priv->tsfeed);
1052         } else
1053                 ret = -EINVAL;
1054
1055 error:
1056         mutex_unlock(&priv->mutex);
1057         return ret;
1058 }
1059
1060 static int dvb_net_feed_stop(struct net_device *dev)
1061 {
1062         struct dvb_net_priv *priv = netdev_priv(dev);
1063         int i, ret = 0;
1064
1065         dprintk("%s\n", __func__);
1066         mutex_lock(&priv->mutex);
1067         if (priv->feedtype == DVB_NET_FEEDTYPE_MPE) {
1068                 if (priv->secfeed) {
1069                         if (priv->secfeed->is_filtering) {
1070                                 dprintk("%s: stop secfeed\n", __func__);
1071                                 priv->secfeed->stop_filtering(priv->secfeed);
1072                         }
1073
1074                         if (priv->secfilter) {
1075                                 dprintk("%s: release secfilter\n", __func__);
1076                                 priv->secfeed->release_filter(priv->secfeed,
1077                                                               priv->secfilter);
1078                                 priv->secfilter=NULL;
1079                         }
1080
1081                         for (i=0; i<priv->multi_num; i++) {
1082                                 if (priv->multi_secfilter[i]) {
1083                                         dprintk("%s: release multi_filter[%d]\n",
1084                                                 __func__, i);
1085                                         priv->secfeed->release_filter(priv->secfeed,
1086                                                                       priv->multi_secfilter[i]);
1087                                         priv->multi_secfilter[i] = NULL;
1088                                 }
1089                         }
1090
1091                         priv->demux->release_section_feed(priv->demux, priv->secfeed);
1092                         priv->secfeed = NULL;
1093                 } else
1094                         printk("%s: no feed to stop\n", dev->name);
1095         } else if (priv->feedtype == DVB_NET_FEEDTYPE_ULE) {
1096                 if (priv->tsfeed) {
1097                         if (priv->tsfeed->is_filtering) {
1098                                 dprintk("%s: stop tsfeed\n", __func__);
1099                                 priv->tsfeed->stop_filtering(priv->tsfeed);
1100                         }
1101                         priv->demux->release_ts_feed(priv->demux, priv->tsfeed);
1102                         priv->tsfeed = NULL;
1103                 }
1104                 else
1105                         printk("%s: no ts feed to stop\n", dev->name);
1106         } else
1107                 ret = -EINVAL;
1108         mutex_unlock(&priv->mutex);
1109         return ret;
1110 }
1111
1112
1113 static int dvb_set_mc_filter (struct net_device *dev, struct dev_mc_list *mc)
1114 {
1115         struct dvb_net_priv *priv = netdev_priv(dev);
1116
1117         if (priv->multi_num == DVB_NET_MULTICAST_MAX)
1118                 return -ENOMEM;
1119
1120         memcpy(priv->multi_macs[priv->multi_num], mc->dmi_addr, 6);
1121
1122         priv->multi_num++;
1123         return 0;
1124 }
1125
1126
1127 static void wq_set_multicast_list (struct work_struct *work)
1128 {
1129         struct dvb_net_priv *priv =
1130                 container_of(work, struct dvb_net_priv, set_multicast_list_wq);
1131         struct net_device *dev = priv->net;
1132
1133         dvb_net_feed_stop(dev);
1134         priv->rx_mode = RX_MODE_UNI;
1135         netif_addr_lock_bh(dev);
1136
1137         if (dev->flags & IFF_PROMISC) {
1138                 dprintk("%s: promiscuous mode\n", dev->name);
1139                 priv->rx_mode = RX_MODE_PROMISC;
1140         } else if ((dev->flags & IFF_ALLMULTI)) {
1141                 dprintk("%s: allmulti mode\n", dev->name);
1142                 priv->rx_mode = RX_MODE_ALL_MULTI;
1143         } else if (dev->mc_count) {
1144                 int mci;
1145                 struct dev_mc_list *mc;
1146
1147                 dprintk("%s: set_mc_list, %d entries\n",
1148                         dev->name, dev->mc_count);
1149
1150                 priv->rx_mode = RX_MODE_MULTI;
1151                 priv->multi_num = 0;
1152
1153                 for (mci = 0, mc=dev->mc_list;
1154                      mci < dev->mc_count;
1155                      mc = mc->next, mci++) {
1156                         dvb_set_mc_filter(dev, mc);
1157                 }
1158         }
1159
1160         netif_addr_unlock_bh(dev);
1161         dvb_net_feed_start(dev);
1162 }
1163
1164
1165 static void dvb_net_set_multicast_list (struct net_device *dev)
1166 {
1167         struct dvb_net_priv *priv = netdev_priv(dev);
1168         schedule_work(&priv->set_multicast_list_wq);
1169 }
1170
1171
1172 static void wq_restart_net_feed (struct work_struct *work)
1173 {
1174         struct dvb_net_priv *priv =
1175                 container_of(work, struct dvb_net_priv, restart_net_feed_wq);
1176         struct net_device *dev = priv->net;
1177
1178         if (netif_running(dev)) {
1179                 dvb_net_feed_stop(dev);
1180                 dvb_net_feed_start(dev);
1181         }
1182 }
1183
1184
1185 static int dvb_net_set_mac (struct net_device *dev, void *p)
1186 {
1187         struct dvb_net_priv *priv = netdev_priv(dev);
1188         struct sockaddr *addr=p;
1189
1190         memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1191
1192         if (netif_running(dev))
1193                 schedule_work(&priv->restart_net_feed_wq);
1194
1195         return 0;
1196 }
1197
1198
1199 static int dvb_net_open(struct net_device *dev)
1200 {
1201         struct dvb_net_priv *priv = netdev_priv(dev);
1202
1203         priv->in_use++;
1204         dvb_net_feed_start(dev);
1205         return 0;
1206 }
1207
1208
1209 static int dvb_net_stop(struct net_device *dev)
1210 {
1211         struct dvb_net_priv *priv = netdev_priv(dev);
1212
1213         priv->in_use--;
1214         return dvb_net_feed_stop(dev);
1215 }
1216
1217 static const struct header_ops dvb_header_ops = {
1218         .create         = eth_header,
1219         .parse          = eth_header_parse,
1220         .rebuild        = eth_rebuild_header,
1221 };
1222
1223
1224 static const struct net_device_ops dvb_netdev_ops = {
1225         .ndo_open               = dvb_net_open,
1226         .ndo_stop               = dvb_net_stop,
1227         .ndo_start_xmit         = dvb_net_tx,
1228         .ndo_set_multicast_list = dvb_net_set_multicast_list,
1229         .ndo_set_mac_address    = dvb_net_set_mac,
1230         .ndo_change_mtu         = eth_change_mtu,
1231         .ndo_validate_addr      = eth_validate_addr,
1232 };
1233
1234 static void dvb_net_setup(struct net_device *dev)
1235 {
1236         ether_setup(dev);
1237
1238         dev->header_ops         = &dvb_header_ops;
1239         dev->netdev_ops         = &dvb_netdev_ops;
1240         dev->mtu                = 4096;
1241         dev->mc_count           = 0;
1242
1243         dev->flags |= IFF_NOARP;
1244 }
1245
1246 static int get_if(struct dvb_net *dvbnet)
1247 {
1248         int i;
1249
1250         for (i=0; i<DVB_NET_DEVICES_MAX; i++)
1251                 if (!dvbnet->state[i])
1252                         break;
1253
1254         if (i == DVB_NET_DEVICES_MAX)
1255                 return -1;
1256
1257         dvbnet->state[i]=1;
1258         return i;
1259 }
1260
1261 static int dvb_net_add_if(struct dvb_net *dvbnet, u16 pid, u8 feedtype)
1262 {
1263         struct net_device *net;
1264         struct dvb_net_priv *priv;
1265         int result;
1266         int if_num;
1267
1268         if (feedtype != DVB_NET_FEEDTYPE_MPE && feedtype != DVB_NET_FEEDTYPE_ULE)
1269                 return -EINVAL;
1270         if ((if_num = get_if(dvbnet)) < 0)
1271                 return -EINVAL;
1272
1273         net = alloc_netdev(sizeof(struct dvb_net_priv), "dvb", dvb_net_setup);
1274         if (!net)
1275                 return -ENOMEM;
1276
1277         if (dvbnet->dvbdev->id)
1278                 snprintf(net->name, IFNAMSIZ, "dvb%d%u%d",
1279                          dvbnet->dvbdev->adapter->num, dvbnet->dvbdev->id, if_num);
1280         else
1281                 /* compatibility fix to keep dvb0_0 format */
1282                 snprintf(net->name, IFNAMSIZ, "dvb%d_%d",
1283                          dvbnet->dvbdev->adapter->num, if_num);
1284
1285         net->addr_len = 6;
1286         memcpy(net->dev_addr, dvbnet->dvbdev->adapter->proposed_mac, 6);
1287
1288         dvbnet->device[if_num] = net;
1289
1290         priv = netdev_priv(net);
1291         priv->net = net;
1292         priv->demux = dvbnet->demux;
1293         priv->pid = pid;
1294         priv->rx_mode = RX_MODE_UNI;
1295         priv->need_pusi = 1;
1296         priv->tscc = 0;
1297         priv->feedtype = feedtype;
1298         reset_ule(priv);
1299
1300         INIT_WORK(&priv->set_multicast_list_wq, wq_set_multicast_list);
1301         INIT_WORK(&priv->restart_net_feed_wq, wq_restart_net_feed);
1302         mutex_init(&priv->mutex);
1303
1304         net->base_addr = pid;
1305
1306         if ((result = register_netdev(net)) < 0) {
1307                 dvbnet->device[if_num] = NULL;
1308                 free_netdev(net);
1309                 return result;
1310         }
1311         printk("dvb_net: created network interface %s\n", net->name);
1312
1313         return if_num;
1314 }
1315
1316 static int dvb_net_remove_if(struct dvb_net *dvbnet, unsigned long num)
1317 {
1318         struct net_device *net = dvbnet->device[num];
1319         struct dvb_net_priv *priv;
1320
1321         if (!dvbnet->state[num])
1322                 return -EINVAL;
1323         priv = netdev_priv(net);
1324         if (priv->in_use)
1325                 return -EBUSY;
1326
1327         dvb_net_stop(net);
1328         flush_scheduled_work();
1329         printk("dvb_net: removed network interface %s\n", net->name);
1330         unregister_netdev(net);
1331         dvbnet->state[num]=0;
1332         dvbnet->device[num] = NULL;
1333         free_netdev(net);
1334
1335         return 0;
1336 }
1337
1338 static int dvb_net_do_ioctl(struct inode *inode, struct file *file,
1339                   unsigned int cmd, void *parg)
1340 {
1341         struct dvb_device *dvbdev = file->private_data;
1342         struct dvb_net *dvbnet = dvbdev->priv;
1343
1344         if (((file->f_flags&O_ACCMODE)==O_RDONLY))
1345                 return -EPERM;
1346
1347         switch (cmd) {
1348         case NET_ADD_IF:
1349         {
1350                 struct dvb_net_if *dvbnetif = parg;
1351                 int result;
1352
1353                 if (!capable(CAP_SYS_ADMIN))
1354                         return -EPERM;
1355
1356                 if (!try_module_get(dvbdev->adapter->module))
1357                         return -EPERM;
1358
1359                 result=dvb_net_add_if(dvbnet, dvbnetif->pid, dvbnetif->feedtype);
1360                 if (result<0) {
1361                         module_put(dvbdev->adapter->module);
1362                         return result;
1363                 }
1364                 dvbnetif->if_num=result;
1365                 break;
1366         }
1367         case NET_GET_IF:
1368         {
1369                 struct net_device *netdev;
1370                 struct dvb_net_priv *priv_data;
1371                 struct dvb_net_if *dvbnetif = parg;
1372
1373                 if (dvbnetif->if_num >= DVB_NET_DEVICES_MAX ||
1374                     !dvbnet->state[dvbnetif->if_num])
1375                         return -EINVAL;
1376
1377                 netdev = dvbnet->device[dvbnetif->if_num];
1378
1379                 priv_data = netdev_priv(netdev);
1380                 dvbnetif->pid=priv_data->pid;
1381                 dvbnetif->feedtype=priv_data->feedtype;
1382                 break;
1383         }
1384         case NET_REMOVE_IF:
1385         {
1386                 int ret;
1387
1388                 if (!capable(CAP_SYS_ADMIN))
1389                         return -EPERM;
1390                 if ((unsigned long) parg >= DVB_NET_DEVICES_MAX)
1391                         return -EINVAL;
1392                 ret = dvb_net_remove_if(dvbnet, (unsigned long) parg);
1393                 if (!ret)
1394                         module_put(dvbdev->adapter->module);
1395                 return ret;
1396         }
1397
1398         /* binary compatiblity cruft */
1399         case __NET_ADD_IF_OLD:
1400         {
1401                 struct __dvb_net_if_old *dvbnetif = parg;
1402                 int result;
1403
1404                 if (!capable(CAP_SYS_ADMIN))
1405                         return -EPERM;
1406
1407                 if (!try_module_get(dvbdev->adapter->module))
1408                         return -EPERM;
1409
1410                 result=dvb_net_add_if(dvbnet, dvbnetif->pid, DVB_NET_FEEDTYPE_MPE);
1411                 if (result<0) {
1412                         module_put(dvbdev->adapter->module);
1413                         return result;
1414                 }
1415                 dvbnetif->if_num=result;
1416                 break;
1417         }
1418         case __NET_GET_IF_OLD:
1419         {
1420                 struct net_device *netdev;
1421                 struct dvb_net_priv *priv_data;
1422                 struct __dvb_net_if_old *dvbnetif = parg;
1423
1424                 if (dvbnetif->if_num >= DVB_NET_DEVICES_MAX ||
1425                     !dvbnet->state[dvbnetif->if_num])
1426                         return -EINVAL;
1427
1428                 netdev = dvbnet->device[dvbnetif->if_num];
1429
1430                 priv_data = netdev_priv(netdev);
1431                 dvbnetif->pid=priv_data->pid;
1432                 break;
1433         }
1434         default:
1435                 return -ENOTTY;
1436         }
1437         return 0;
1438 }
1439
1440 static int dvb_net_ioctl(struct inode *inode, struct file *file,
1441               unsigned int cmd, unsigned long arg)
1442 {
1443         return dvb_usercopy(inode, file, cmd, arg, dvb_net_do_ioctl);
1444 }
1445
1446 static int dvb_net_close(struct inode *inode, struct file *file)
1447 {
1448         struct dvb_device *dvbdev = file->private_data;
1449         struct dvb_net *dvbnet = dvbdev->priv;
1450
1451         dvb_generic_release(inode, file);
1452
1453         if(dvbdev->users == 1 && dvbnet->exit == 1) {
1454                 fops_put(file->f_op);
1455                 file->f_op = NULL;
1456                 wake_up(&dvbdev->wait_queue);
1457         }
1458         return 0;
1459 }
1460
1461
1462 static struct file_operations dvb_net_fops = {
1463         .owner = THIS_MODULE,
1464         .ioctl = dvb_net_ioctl,
1465         .open = dvb_generic_open,
1466         .release = dvb_net_close,
1467 };
1468
1469 static struct dvb_device dvbdev_net = {
1470         .priv = NULL,
1471         .users = 1,
1472         .writers = 1,
1473         .fops = &dvb_net_fops,
1474 };
1475
1476
1477 void dvb_net_release (struct dvb_net *dvbnet)
1478 {
1479         int i;
1480
1481         dvbnet->exit = 1;
1482         if (dvbnet->dvbdev->users < 1)
1483                 wait_event(dvbnet->dvbdev->wait_queue,
1484                                 dvbnet->dvbdev->users==1);
1485
1486         dvb_unregister_device(dvbnet->dvbdev);
1487
1488         for (i=0; i<DVB_NET_DEVICES_MAX; i++) {
1489                 if (!dvbnet->state[i])
1490                         continue;
1491                 dvb_net_remove_if(dvbnet, i);
1492         }
1493 }
1494 EXPORT_SYMBOL(dvb_net_release);
1495
1496
1497 int dvb_net_init (struct dvb_adapter *adap, struct dvb_net *dvbnet,
1498                   struct dmx_demux *dmx)
1499 {
1500         int i;
1501
1502         dvbnet->demux = dmx;
1503
1504         for (i=0; i<DVB_NET_DEVICES_MAX; i++)
1505                 dvbnet->state[i] = 0;
1506
1507         dvb_register_device (adap, &dvbnet->dvbdev, &dvbdev_net,
1508                              dvbnet, DVB_DEVICE_NET);
1509
1510         return 0;
1511 }
1512 EXPORT_SYMBOL(dvb_net_init);