V4L/DVB (5834): dvb-core: fix signedness warnings and const stripping
[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         struct net_device_stats stats;
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 unsigned short dvb_net_eth_type_trans(struct sk_buff *skb,
172                                       struct net_device *dev)
173 {
174         struct ethhdr *eth;
175         unsigned char *rawp;
176
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(*(unsigned short *)p->ule_next_hdr);
281                                         p->ule_next_hdr += 2;
282                                 } else {
283                                         p->ule_sndu_type = ntohs(*(unsigned short *)(p->ule_next_hdr + ((p->ule_dbit ? 2 : 3) * ETH_ALEN)));
284                                         /* This assures the extension handling loop will terminate. */
285                                 }
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( *(unsigned short *)(p->ule_next_hdr-2) );
298                 /*
299                  * note: the length of the next header type is included in the
300                  * length of THIS optional extension header
301                  */
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 = dev->priv;
349         unsigned long skipped = 0L;
350         const u8 *ts, *ts_end, *from_where = NULL;
351         u8 ts_remain = 0, how_much = 0, new_ts = 1;
352         struct ethhdr *ethh = NULL;
353
354 #ifdef ULE_DEBUG
355         /* The code inside ULE_DEBUG keeps a history of the last 100 TS cells processed. */
356         static unsigned char ule_hist[100*TS_SZ];
357         static unsigned char *ule_where = ule_hist, ule_dump = 0;
358 #endif
359
360         if (dev == NULL) {
361                 printk( KERN_ERR "NO netdev struct!\n" );
362                 return;
363         }
364
365         /* For all TS cells in current buffer.
366          * Appearently, we are called for every single TS cell.
367          */
368         for (ts = buf, ts_end = buf + buf_len; ts < ts_end; /* no default incr. */ ) {
369
370                 if (new_ts) {
371                         /* We are about to process a new TS cell. */
372
373 #ifdef ULE_DEBUG
374                         if (ule_where >= &ule_hist[100*TS_SZ]) ule_where = ule_hist;
375                         memcpy( ule_where, ts, TS_SZ );
376                         if (ule_dump) {
377                                 hexdump( ule_where, TS_SZ );
378                                 ule_dump = 0;
379                         }
380                         ule_where += TS_SZ;
381 #endif
382
383                         /* Check TS error conditions: sync_byte, transport_error_indicator, scrambling_control . */
384                         if ((ts[0] != TS_SYNC) || (ts[1] & TS_TEI) || ((ts[3] & TS_SC) != 0)) {
385                                 printk(KERN_WARNING "%lu: Invalid TS cell: SYNC %#x, TEI %u, SC %#x.\n",
386                                        priv->ts_count, ts[0], ts[1] & TS_TEI >> 7, ts[3] & 0xC0 >> 6);
387
388                                 /* Drop partly decoded SNDU, reset state, resync on PUSI. */
389                                 if (priv->ule_skb) {
390                                         dev_kfree_skb( priv->ule_skb );
391                                         /* Prepare for next SNDU. */
392                                         priv->stats.rx_errors++;
393                                         priv->stats.rx_frame_errors++;
394                                 }
395                                 reset_ule(priv);
396                                 priv->need_pusi = 1;
397
398                                 /* Continue with next TS cell. */
399                                 ts += TS_SZ;
400                                 priv->ts_count++;
401                                 continue;
402                         }
403
404                         ts_remain = 184;
405                         from_where = ts + 4;
406                 }
407                 /* Synchronize on PUSI, if required. */
408                 if (priv->need_pusi) {
409                         if (ts[1] & TS_PUSI) {
410                                 /* Find beginning of first ULE SNDU in current TS cell. */
411                                 /* Synchronize continuity counter. */
412                                 priv->tscc = ts[3] & 0x0F;
413                                 /* There is a pointer field here. */
414                                 if (ts[4] > ts_remain) {
415                                         printk(KERN_ERR "%lu: Invalid ULE packet "
416                                                "(pointer field %d)\n", priv->ts_count, ts[4]);
417                                         ts += TS_SZ;
418                                         priv->ts_count++;
419                                         continue;
420                                 }
421                                 /* Skip to destination of pointer field. */
422                                 from_where = &ts[5] + ts[4];
423                                 ts_remain -= 1 + ts[4];
424                                 skipped = 0;
425                         } else {
426                                 skipped++;
427                                 ts += TS_SZ;
428                                 priv->ts_count++;
429                                 continue;
430                         }
431                 }
432
433                 if (new_ts) {
434                         /* Check continuity counter. */
435                         if ((ts[3] & 0x0F) == priv->tscc)
436                                 priv->tscc = (priv->tscc + 1) & 0x0F;
437                         else {
438                                 /* TS discontinuity handling: */
439                                 printk(KERN_WARNING "%lu: TS discontinuity: got %#x, "
440                                        "expected %#x.\n", priv->ts_count, ts[3] & 0x0F, priv->tscc);
441                                 /* Drop partly decoded SNDU, reset state, resync on PUSI. */
442                                 if (priv->ule_skb) {
443                                         dev_kfree_skb( priv->ule_skb );
444                                         /* Prepare for next SNDU. */
445                                         // reset_ule(priv);  moved to below.
446                                         priv->stats.rx_errors++;
447                                         priv->stats.rx_frame_errors++;
448                                 }
449                                 reset_ule(priv);
450                                 /* skip to next PUSI. */
451                                 priv->need_pusi = 1;
452                                 continue;
453                         }
454                         /* If we still have an incomplete payload, but PUSI is
455                          * set; some TS cells are missing.
456                          * This is only possible here, if we missed exactly 16 TS
457                          * cells (continuity counter wrap). */
458                         if (ts[1] & TS_PUSI) {
459                                 if (! priv->need_pusi) {
460                                         if (!(*from_where < (ts_remain-1)) || *from_where != priv->ule_sndu_remain) {
461                                                 /* Pointer field is invalid.  Drop this TS cell and any started ULE SNDU. */
462                                                 printk(KERN_WARNING "%lu: Invalid pointer "
463                                                        "field: %u.\n", priv->ts_count, *from_where);
464
465                                                 /* Drop partly decoded SNDU, reset state, resync on PUSI. */
466                                                 if (priv->ule_skb) {
467                                                         dev_kfree_skb( priv->ule_skb );
468                                                         ((struct dvb_net_priv *) dev->priv)->stats.rx_errors++;
469                                                         ((struct dvb_net_priv *) dev->priv)->stats.rx_frame_errors++;
470                                                 }
471                                                 reset_ule(priv);
472                                                 priv->need_pusi = 1;
473                                                 continue;
474                                         }
475                                         /* Skip pointer field (we're processing a
476                                          * packed payload). */
477                                         from_where += 1;
478                                         ts_remain -= 1;
479                                 } else
480                                         priv->need_pusi = 0;
481
482                                 if (priv->ule_sndu_remain > 183) {
483                                         /* Current SNDU lacks more data than there could be available in the
484                                          * current TS cell. */
485                                         priv->stats.rx_errors++;
486                                         priv->stats.rx_length_errors++;
487                                         printk(KERN_WARNING "%lu: Expected %d more SNDU bytes, but "
488                                                "got PUSI (pf %d, ts_remain %d).  Flushing incomplete payload.\n",
489                                                priv->ts_count, priv->ule_sndu_remain, ts[4], ts_remain);
490                                         dev_kfree_skb(priv->ule_skb);
491                                         /* Prepare for next SNDU. */
492                                         reset_ule(priv);
493                                         /* Resync: go to where pointer field points to: start of next ULE SNDU. */
494                                         from_where += ts[4];
495                                         ts_remain -= ts[4];
496                                 }
497                         }
498                 }
499
500                 /* Check if new payload needs to be started. */
501                 if (priv->ule_skb == NULL) {
502                         /* Start a new payload with skb.
503                          * Find ULE header.  It is only guaranteed that the
504                          * length field (2 bytes) is contained in the current
505                          * TS.
506                          * Check ts_remain has to be >= 2 here. */
507                         if (ts_remain < 2) {
508                                 printk(KERN_WARNING "Invalid payload packing: only %d "
509                                        "bytes left in TS.  Resyncing.\n", ts_remain);
510                                 priv->ule_sndu_len = 0;
511                                 priv->need_pusi = 1;
512                                 continue;
513                         }
514
515                         if (! priv->ule_sndu_len) {
516                                 /* Got at least two bytes, thus extrace the SNDU length. */
517                                 priv->ule_sndu_len = from_where[0] << 8 | from_where[1];
518                                 if (priv->ule_sndu_len & 0x8000) {
519                                         /* D-Bit is set: no dest mac present. */
520                                         priv->ule_sndu_len &= 0x7FFF;
521                                         priv->ule_dbit = 1;
522                                 } else
523                                         priv->ule_dbit = 0;
524
525                                 if (priv->ule_sndu_len < 5) {
526                                         printk(KERN_WARNING "%lu: Invalid ULE SNDU length %u. "
527                                                "Resyncing.\n", priv->ts_count, priv->ule_sndu_len);
528                                         priv->stats.rx_errors++;
529                                         priv->stats.rx_length_errors++;
530                                         priv->ule_sndu_len = 0;
531                                         priv->need_pusi = 1;
532                                         new_ts = 1;
533                                         ts += TS_SZ;
534                                         priv->ts_count++;
535                                         continue;
536                                 }
537                                 ts_remain -= 2; /* consume the 2 bytes SNDU length. */
538                                 from_where += 2;
539                         }
540
541                         /*
542                          * State of current TS:
543                          *   ts_remain (remaining bytes in the current TS cell)
544                          *   0  ule_type is not available now, we need the next TS cell
545                          *   1  the first byte of the ule_type is present
546                          * >=2  full ULE header present, maybe some payload data as well.
547                          */
548                         switch (ts_remain) {
549                                 case 1:
550                                         priv->ule_sndu_type = from_where[0] << 8;
551                                         priv->ule_sndu_type_1 = 1; /* first byte of ule_type is set. */
552                                         ts_remain -= 1; from_where += 1;
553                                         /* Continue w/ next TS. */
554                                 case 0:
555                                         new_ts = 1;
556                                         ts += TS_SZ;
557                                         priv->ts_count++;
558                                         continue;
559
560                                 default: /* complete ULE header is present in current TS. */
561                                         /* Extract ULE type field. */
562                                         if (priv->ule_sndu_type_1) {
563                                                 priv->ule_sndu_type |= from_where[0];
564                                                 from_where += 1; /* points to payload start. */
565                                                 ts_remain -= 1;
566                                         } else {
567                                                 /* Complete type is present in new TS. */
568                                                 priv->ule_sndu_type = from_where[0] << 8 | from_where[1];
569                                                 from_where += 2; /* points to payload start. */
570                                                 ts_remain -= 2;
571                                         }
572                                         break;
573                         }
574
575                         /* Allocate the skb (decoder target buffer) with the correct size, as follows:
576                          * prepare for the largest case: bridged SNDU with MAC address (dbit = 0). */
577                         priv->ule_skb = dev_alloc_skb( priv->ule_sndu_len + ETH_HLEN + ETH_ALEN );
578                         if (priv->ule_skb == NULL) {
579                                 printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n",
580                                        dev->name);
581                                 ((struct dvb_net_priv *)dev->priv)->stats.rx_dropped++;
582                                 return;
583                         }
584
585                         /* This includes the CRC32 _and_ dest mac, if !dbit. */
586                         priv->ule_sndu_remain = priv->ule_sndu_len;
587                         priv->ule_skb->dev = dev;
588                         /* Leave space for Ethernet or bridged SNDU header (eth hdr plus one MAC addr). */
589                         skb_reserve( priv->ule_skb, ETH_HLEN + ETH_ALEN );
590                 }
591
592                 /* Copy data into our current skb. */
593                 how_much = min(priv->ule_sndu_remain, (int)ts_remain);
594                 memcpy(skb_put(priv->ule_skb, how_much), from_where, how_much);
595                 priv->ule_sndu_remain -= how_much;
596                 ts_remain -= how_much;
597                 from_where += how_much;
598
599                 /* Check for complete payload. */
600                 if (priv->ule_sndu_remain <= 0) {
601                         /* Check CRC32, we've got it in our skb already. */
602                         unsigned short ulen = htons(priv->ule_sndu_len);
603                         unsigned short utype = htons(priv->ule_sndu_type);
604                         const u8 *tail;
605                         struct kvec iov[3] = {
606                                 { &ulen, sizeof ulen },
607                                 { &utype, sizeof utype },
608                                 { priv->ule_skb->data, priv->ule_skb->len - 4 }
609                         };
610                         u32 ule_crc = ~0L, expected_crc;
611                         if (priv->ule_dbit) {
612                                 /* Set D-bit for CRC32 verification,
613                                  * if it was set originally. */
614                                 ulen |= 0x0080;
615                         }
616
617                         ule_crc = iov_crc32(ule_crc, iov, 3);
618                         tail = skb_tail_pointer(priv->ule_skb);
619                         expected_crc = *(tail - 4) << 24 |
620                                        *(tail - 3) << 16 |
621                                        *(tail - 2) << 8 |
622                                        *(tail - 1);
623                         if (ule_crc != expected_crc) {
624                                 printk(KERN_WARNING "%lu: CRC32 check FAILED: %08x / %08x, SNDU len %d type %#x, ts_remain %d, next 2: %x.\n",
625                                        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);
626
627 #ifdef ULE_DEBUG
628                                 hexdump( iov[0].iov_base, iov[0].iov_len );
629                                 hexdump( iov[1].iov_base, iov[1].iov_len );
630                                 hexdump( iov[2].iov_base, iov[2].iov_len );
631
632                                 if (ule_where == ule_hist) {
633                                         hexdump( &ule_hist[98*TS_SZ], TS_SZ );
634                                         hexdump( &ule_hist[99*TS_SZ], TS_SZ );
635                                 } else if (ule_where == &ule_hist[TS_SZ]) {
636                                         hexdump( &ule_hist[99*TS_SZ], TS_SZ );
637                                         hexdump( ule_hist, TS_SZ );
638                                 } else {
639                                         hexdump( ule_where - TS_SZ - TS_SZ, TS_SZ );
640                                         hexdump( ule_where - TS_SZ, TS_SZ );
641                                 }
642                                 ule_dump = 1;
643 #endif
644
645                                 priv->stats.rx_errors++;
646                                 priv->stats.rx_crc_errors++;
647                                 dev_kfree_skb(priv->ule_skb);
648                         } else {
649                                 /* CRC32 verified OK. */
650                                 u8 dest_addr[ETH_ALEN];
651                                 static const u8 bc_addr[ETH_ALEN] =
652                                         { [ 0 ... ETH_ALEN-1] = 0xff };
653
654                                 /* CRC32 was OK. Remove it from skb. */
655                                 priv->ule_skb->tail -= 4;
656                                 priv->ule_skb->len -= 4;
657
658                                 if (!priv->ule_dbit) {
659                                         /*
660                                          * The destination MAC address is the
661                                          * next data in the skb.  It comes
662                                          * before any extension headers.
663                                          *
664                                          * Check if the payload of this SNDU
665                                          * should be passed up the stack.
666                                          */
667                                         register int drop = 0;
668                                         if (priv->rx_mode != RX_MODE_PROMISC) {
669                                                 if (priv->ule_skb->data[0] & 0x01) {
670                                                         /* multicast or broadcast */
671                                                         if (memcmp(priv->ule_skb->data, bc_addr, ETH_ALEN)) {
672                                                                 /* multicast */
673                                                                 if (priv->rx_mode == RX_MODE_MULTI) {
674                                                                         int i;
675                                                                         for(i = 0; i < priv->multi_num && memcmp(priv->ule_skb->data, priv->multi_macs[i], ETH_ALEN); i++)
676                                                                                 ;
677                                                                         if (i == priv->multi_num)
678                                                                                 drop = 1;
679                                                                 } else if (priv->rx_mode != RX_MODE_ALL_MULTI)
680                                                                         drop = 1; /* no broadcast; */
681                                                                 /* else: all multicast mode: accept all multicast packets */
682                                                         }
683                                                         /* else: broadcast */
684                                                 }
685                                                 else if (memcmp(priv->ule_skb->data, dev->dev_addr, ETH_ALEN))
686                                                         drop = 1;
687                                                 /* else: destination address matches the MAC address of our receiver device */
688                                         }
689                                         /* else: promiscious mode; pass everything up the stack */
690
691                                         if (drop) {
692 #ifdef ULE_DEBUG
693                                                 dprintk("Dropping SNDU: MAC destination address does not match: dest addr: "MAC_ADDR_PRINTFMT", dev addr: "MAC_ADDR_PRINTFMT"\n",
694                                                         MAX_ADDR_PRINTFMT_ARGS(priv->ule_skb->data), MAX_ADDR_PRINTFMT_ARGS(dev->dev_addr));
695 #endif
696                                                 dev_kfree_skb(priv->ule_skb);
697                                                 goto sndu_done;
698                                         }
699                                         else
700                                         {
701                                                 skb_copy_from_linear_data(priv->ule_skb,
702                                                               dest_addr,
703                                                               ETH_ALEN);
704                                                 skb_pull(priv->ule_skb, ETH_ALEN);
705                                         }
706                                 }
707
708                                 /* Handle ULE Extension Headers. */
709                                 if (priv->ule_sndu_type < 1536) {
710                                         /* There is an extension header.  Handle it accordingly. */
711                                         int l = handle_ule_extensions(priv);
712                                         if (l < 0) {
713                                                 /* Mandatory extension header unknown or TEST SNDU.  Drop it. */
714                                                 // printk( KERN_WARNING "Dropping SNDU, extension headers.\n" );
715                                                 dev_kfree_skb(priv->ule_skb);
716                                                 goto sndu_done;
717                                         }
718                                         skb_pull(priv->ule_skb, l);
719                                 }
720
721                                 /*
722                                  * Construct/assure correct ethernet header.
723                                  * Note: in bridged mode (priv->ule_bridged !=
724                                  * 0) we already have the (original) ethernet
725                                  * header at the start of the payload (after
726                                  * optional dest. address and any extension
727                                  * headers).
728                                  */
729
730                                 if (!priv->ule_bridged) {
731                                         skb_push(priv->ule_skb, ETH_HLEN);
732                                         ethh = (struct ethhdr *)priv->ule_skb->data;
733                                         if (!priv->ule_dbit) {
734                                                  /* dest_addr buffer is only valid if priv->ule_dbit == 0 */
735                                                 memcpy(ethh->h_dest, dest_addr, ETH_ALEN);
736                                                 memset(ethh->h_source, 0, ETH_ALEN);
737                                         }
738                                         else /* zeroize source and dest */
739                                                 memset( ethh, 0, ETH_ALEN*2 );
740
741                                         ethh->h_proto = htons(priv->ule_sndu_type);
742                                 }
743                                 /* else:  skb is in correct state; nothing to do. */
744                                 priv->ule_bridged = 0;
745
746                                 /* Stuff into kernel's protocol stack. */
747                                 priv->ule_skb->protocol = dvb_net_eth_type_trans(priv->ule_skb, dev);
748                                 /* If D-bit is set (i.e. destination MAC address not present),
749                                  * receive the packet anyhow. */
750                                 /* if (priv->ule_dbit && skb->pkt_type == PACKET_OTHERHOST)
751                                         priv->ule_skb->pkt_type = PACKET_HOST; */
752                                 priv->stats.rx_packets++;
753                                 priv->stats.rx_bytes += priv->ule_skb->len;
754                                 netif_rx(priv->ule_skb);
755                         }
756                         sndu_done:
757                         /* Prepare for next SNDU. */
758                         reset_ule(priv);
759                 }
760
761                 /* More data in current TS (look at the bytes following the CRC32)? */
762                 if (ts_remain >= 2 && *((unsigned short *)from_where) != 0xFFFF) {
763                         /* Next ULE SNDU starts right there. */
764                         new_ts = 0;
765                         priv->ule_skb = NULL;
766                         priv->ule_sndu_type_1 = 0;
767                         priv->ule_sndu_len = 0;
768                         // printk(KERN_WARNING "More data in current TS: [%#x %#x %#x %#x]\n",
769                         //      *(from_where + 0), *(from_where + 1),
770                         //      *(from_where + 2), *(from_where + 3));
771                         // printk(KERN_WARNING "ts @ %p, stopped @ %p:\n", ts, from_where + 0);
772                         // hexdump(ts, 188);
773                 } else {
774                         new_ts = 1;
775                         ts += TS_SZ;
776                         priv->ts_count++;
777                         if (priv->ule_skb == NULL) {
778                                 priv->need_pusi = 1;
779                                 priv->ule_sndu_type_1 = 0;
780                                 priv->ule_sndu_len = 0;
781                         }
782                 }
783         }       /* for all available TS cells */
784 }
785
786 static int dvb_net_ts_callback(const u8 *buffer1, size_t buffer1_len,
787                                const u8 *buffer2, size_t buffer2_len,
788                                struct dmx_ts_feed *feed, enum dmx_success success)
789 {
790         struct net_device *dev = feed->priv;
791
792         if (buffer2 != 0)
793                 printk(KERN_WARNING "buffer2 not 0: %p.\n", buffer2);
794         if (buffer1_len > 32768)
795                 printk(KERN_WARNING "length > 32k: %zu.\n", buffer1_len);
796         /* printk("TS callback: %u bytes, %u TS cells @ %p.\n",
797                   buffer1_len, buffer1_len / TS_SZ, buffer1); */
798         dvb_net_ule(dev, buffer1, buffer1_len);
799         return 0;
800 }
801
802
803 static void dvb_net_sec(struct net_device *dev, u8 *pkt, int pkt_len)
804 {
805         u8 *eth;
806         struct sk_buff *skb;
807         struct net_device_stats *stats = &(((struct dvb_net_priv *) dev->priv)->stats);
808         int snap = 0;
809
810         /* note: pkt_len includes a 32bit checksum */
811         if (pkt_len < 16) {
812                 printk("%s: IP/MPE packet length = %d too small.\n",
813                         dev->name, pkt_len);
814                 stats->rx_errors++;
815                 stats->rx_length_errors++;
816                 return;
817         }
818 /* it seems some ISPs manage to screw up here, so we have to
819  * relax the error checks... */
820 #if 0
821         if ((pkt[5] & 0xfd) != 0xc1) {
822                 /* drop scrambled or broken packets */
823 #else
824         if ((pkt[5] & 0x3c) != 0x00) {
825                 /* drop scrambled */
826 #endif
827                 stats->rx_errors++;
828                 stats->rx_crc_errors++;
829                 return;
830         }
831         if (pkt[5] & 0x02) {
832                 /* handle LLC/SNAP, see rfc-1042 */
833                 if (pkt_len < 24 || memcmp(&pkt[12], "\xaa\xaa\x03\0\0\0", 6)) {
834                         stats->rx_dropped++;
835                         return;
836                 }
837                 snap = 8;
838         }
839         if (pkt[7]) {
840                 /* FIXME: assemble datagram from multiple sections */
841                 stats->rx_errors++;
842                 stats->rx_frame_errors++;
843                 return;
844         }
845
846         /* we have 14 byte ethernet header (ip header follows);
847          * 12 byte MPE header; 4 byte checksum; + 2 byte alignment, 8 byte LLC/SNAP
848          */
849         if (!(skb = dev_alloc_skb(pkt_len - 4 - 12 + 14 + 2 - snap))) {
850                 //printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n", dev->name);
851                 stats->rx_dropped++;
852                 return;
853         }
854         skb_reserve(skb, 2);    /* longword align L3 header */
855         skb->dev = dev;
856
857         /* copy L3 payload */
858         eth = (u8 *) skb_put(skb, pkt_len - 12 - 4 + 14 - snap);
859         memcpy(eth + 14, pkt + 12 + snap, pkt_len - 12 - 4 - snap);
860
861         /* create ethernet header: */
862         eth[0]=pkt[0x0b];
863         eth[1]=pkt[0x0a];
864         eth[2]=pkt[0x09];
865         eth[3]=pkt[0x08];
866         eth[4]=pkt[0x04];
867         eth[5]=pkt[0x03];
868
869         eth[6]=eth[7]=eth[8]=eth[9]=eth[10]=eth[11]=0;
870
871         if (snap) {
872                 eth[12] = pkt[18];
873                 eth[13] = pkt[19];
874         } else {
875                 /* protocol numbers are from rfc-1700 or
876                  * http://www.iana.org/assignments/ethernet-numbers
877                  */
878                 if (pkt[12] >> 4 == 6) { /* version field from IP header */
879                         eth[12] = 0x86; /* IPv6 */
880                         eth[13] = 0xdd;
881                 } else {
882                         eth[12] = 0x08; /* IPv4 */
883                         eth[13] = 0x00;
884                 }
885         }
886
887         skb->protocol = dvb_net_eth_type_trans(skb, dev);
888
889         stats->rx_packets++;
890         stats->rx_bytes+=skb->len;
891         netif_rx(skb);
892 }
893
894 static int dvb_net_sec_callback(const u8 *buffer1, size_t buffer1_len,
895                  const u8 *buffer2, size_t buffer2_len,
896                  struct dmx_section_filter *filter,
897                  enum dmx_success success)
898 {
899         struct net_device *dev = filter->priv;
900
901         /**
902          * we rely on the DVB API definition where exactly one complete
903          * section is delivered in buffer1
904          */
905         dvb_net_sec (dev, (u8*) buffer1, buffer1_len);
906         return 0;
907 }
908
909 static int dvb_net_tx(struct sk_buff *skb, struct net_device *dev)
910 {
911         dev_kfree_skb(skb);
912         return 0;
913 }
914
915 static u8 mask_normal[6]={0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
916 static u8 mask_allmulti[6]={0xff, 0xff, 0xff, 0x00, 0x00, 0x00};
917 static u8 mac_allmulti[6]={0x01, 0x00, 0x5e, 0x00, 0x00, 0x00};
918 static u8 mask_promisc[6]={0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
919
920 static int dvb_net_filter_sec_set(struct net_device *dev,
921                    struct dmx_section_filter **secfilter,
922                    u8 *mac, u8 *mac_mask)
923 {
924         struct dvb_net_priv *priv = dev->priv;
925         int ret;
926
927         *secfilter=NULL;
928         ret = priv->secfeed->allocate_filter(priv->secfeed, secfilter);
929         if (ret<0) {
930                 printk("%s: could not get filter\n", dev->name);
931                 return ret;
932         }
933
934         (*secfilter)->priv=(void *) dev;
935
936         memset((*secfilter)->filter_value, 0x00, DMX_MAX_FILTER_SIZE);
937         memset((*secfilter)->filter_mask,  0x00, DMX_MAX_FILTER_SIZE);
938         memset((*secfilter)->filter_mode,  0xff, DMX_MAX_FILTER_SIZE);
939
940         (*secfilter)->filter_value[0]=0x3e;
941         (*secfilter)->filter_value[3]=mac[5];
942         (*secfilter)->filter_value[4]=mac[4];
943         (*secfilter)->filter_value[8]=mac[3];
944         (*secfilter)->filter_value[9]=mac[2];
945         (*secfilter)->filter_value[10]=mac[1];
946         (*secfilter)->filter_value[11]=mac[0];
947
948         (*secfilter)->filter_mask[0] = 0xff;
949         (*secfilter)->filter_mask[3] = mac_mask[5];
950         (*secfilter)->filter_mask[4] = mac_mask[4];
951         (*secfilter)->filter_mask[8] = mac_mask[3];
952         (*secfilter)->filter_mask[9] = mac_mask[2];
953         (*secfilter)->filter_mask[10] = mac_mask[1];
954         (*secfilter)->filter_mask[11]=mac_mask[0];
955
956         dprintk("%s: filter mac=%02x %02x %02x %02x %02x %02x\n",
957                dev->name, mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
958         dprintk("%s: filter mask=%02x %02x %02x %02x %02x %02x\n",
959                dev->name, mac_mask[0], mac_mask[1], mac_mask[2],
960                mac_mask[3], mac_mask[4], mac_mask[5]);
961
962         return 0;
963 }
964
965 static int dvb_net_feed_start(struct net_device *dev)
966 {
967         int ret = 0, i;
968         struct dvb_net_priv *priv = dev->priv;
969         struct dmx_demux *demux = priv->demux;
970         unsigned char *mac = (unsigned char *) dev->dev_addr;
971
972         dprintk("%s: rx_mode %i\n", __FUNCTION__, priv->rx_mode);
973         mutex_lock(&priv->mutex);
974         if (priv->tsfeed || priv->secfeed || priv->secfilter || priv->multi_secfilter[0])
975                 printk("%s: BUG %d\n", __FUNCTION__, __LINE__);
976
977         priv->secfeed=NULL;
978         priv->secfilter=NULL;
979         priv->tsfeed = NULL;
980
981         if (priv->feedtype == DVB_NET_FEEDTYPE_MPE) {
982                 dprintk("%s: alloc secfeed\n", __FUNCTION__);
983                 ret=demux->allocate_section_feed(demux, &priv->secfeed,
984                                          dvb_net_sec_callback);
985                 if (ret<0) {
986                         printk("%s: could not allocate section feed\n", dev->name);
987                         goto error;
988                 }
989
990                 ret = priv->secfeed->set(priv->secfeed, priv->pid, 32768, 1);
991
992                 if (ret<0) {
993                         printk("%s: could not set section feed\n", dev->name);
994                         priv->demux->release_section_feed(priv->demux, priv->secfeed);
995                         priv->secfeed=NULL;
996                         goto error;
997                 }
998
999                 if (priv->rx_mode != RX_MODE_PROMISC) {
1000                         dprintk("%s: set secfilter\n", __FUNCTION__);
1001                         dvb_net_filter_sec_set(dev, &priv->secfilter, mac, mask_normal);
1002                 }
1003
1004                 switch (priv->rx_mode) {
1005                 case RX_MODE_MULTI:
1006                         for (i = 0; i < priv->multi_num; i++) {
1007                                 dprintk("%s: set multi_secfilter[%d]\n", __FUNCTION__, i);
1008                                 dvb_net_filter_sec_set(dev, &priv->multi_secfilter[i],
1009                                                        priv->multi_macs[i], mask_normal);
1010                         }
1011                         break;
1012                 case RX_MODE_ALL_MULTI:
1013                         priv->multi_num=1;
1014                         dprintk("%s: set multi_secfilter[0]\n", __FUNCTION__);
1015                         dvb_net_filter_sec_set(dev, &priv->multi_secfilter[0],
1016                                                mac_allmulti, mask_allmulti);
1017                         break;
1018                 case RX_MODE_PROMISC:
1019                         priv->multi_num=0;
1020                         dprintk("%s: set secfilter\n", __FUNCTION__);
1021                         dvb_net_filter_sec_set(dev, &priv->secfilter, mac, mask_promisc);
1022                         break;
1023                 }
1024
1025                 dprintk("%s: start filtering\n", __FUNCTION__);
1026                 priv->secfeed->start_filtering(priv->secfeed);
1027         } else if (priv->feedtype == DVB_NET_FEEDTYPE_ULE) {
1028                 struct timespec timeout = { 0, 10000000 }; // 10 msec
1029
1030                 /* we have payloads encapsulated in TS */
1031                 dprintk("%s: alloc tsfeed\n", __FUNCTION__);
1032                 ret = demux->allocate_ts_feed(demux, &priv->tsfeed, dvb_net_ts_callback);
1033                 if (ret < 0) {
1034                         printk("%s: could not allocate ts feed\n", dev->name);
1035                         goto error;
1036                 }
1037
1038                 /* Set netdevice pointer for ts decaps callback. */
1039                 priv->tsfeed->priv = (void *)dev;
1040                 ret = priv->tsfeed->set(priv->tsfeed,
1041                                         priv->pid, /* pid */
1042                                         TS_PACKET, /* type */
1043                                         DMX_TS_PES_OTHER, /* pes type */
1044                                         32768,     /* circular buffer size */
1045                                         timeout    /* timeout */
1046                                         );
1047
1048                 if (ret < 0) {
1049                         printk("%s: could not set ts feed\n", dev->name);
1050                         priv->demux->release_ts_feed(priv->demux, priv->tsfeed);
1051                         priv->tsfeed = NULL;
1052                         goto error;
1053                 }
1054
1055                 dprintk("%s: start filtering\n", __FUNCTION__);
1056                 priv->tsfeed->start_filtering(priv->tsfeed);
1057         } else
1058                 ret = -EINVAL;
1059
1060 error:
1061         mutex_unlock(&priv->mutex);
1062         return ret;
1063 }
1064
1065 static int dvb_net_feed_stop(struct net_device *dev)
1066 {
1067         struct dvb_net_priv *priv = dev->priv;
1068         int i, ret = 0;
1069
1070         dprintk("%s\n", __FUNCTION__);
1071         mutex_lock(&priv->mutex);
1072         if (priv->feedtype == DVB_NET_FEEDTYPE_MPE) {
1073                 if (priv->secfeed) {
1074                         if (priv->secfeed->is_filtering) {
1075                                 dprintk("%s: stop secfeed\n", __FUNCTION__);
1076                                 priv->secfeed->stop_filtering(priv->secfeed);
1077                         }
1078
1079                         if (priv->secfilter) {
1080                                 dprintk("%s: release secfilter\n", __FUNCTION__);
1081                                 priv->secfeed->release_filter(priv->secfeed,
1082                                                               priv->secfilter);
1083                                 priv->secfilter=NULL;
1084                         }
1085
1086                         for (i=0; i<priv->multi_num; i++) {
1087                                 if (priv->multi_secfilter[i]) {
1088                                         dprintk("%s: release multi_filter[%d]\n",
1089                                                 __FUNCTION__, i);
1090                                         priv->secfeed->release_filter(priv->secfeed,
1091                                                                       priv->multi_secfilter[i]);
1092                                         priv->multi_secfilter[i] = NULL;
1093                                 }
1094                         }
1095
1096                         priv->demux->release_section_feed(priv->demux, priv->secfeed);
1097                         priv->secfeed = NULL;
1098                 } else
1099                         printk("%s: no feed to stop\n", dev->name);
1100         } else if (priv->feedtype == DVB_NET_FEEDTYPE_ULE) {
1101                 if (priv->tsfeed) {
1102                         if (priv->tsfeed->is_filtering) {
1103                                 dprintk("%s: stop tsfeed\n", __FUNCTION__);
1104                                 priv->tsfeed->stop_filtering(priv->tsfeed);
1105                         }
1106                         priv->demux->release_ts_feed(priv->demux, priv->tsfeed);
1107                         priv->tsfeed = NULL;
1108                 }
1109                 else
1110                         printk("%s: no ts feed to stop\n", dev->name);
1111         } else
1112                 ret = -EINVAL;
1113         mutex_unlock(&priv->mutex);
1114         return ret;
1115 }
1116
1117
1118 static int dvb_set_mc_filter (struct net_device *dev, struct dev_mc_list *mc)
1119 {
1120         struct dvb_net_priv *priv = dev->priv;
1121
1122         if (priv->multi_num == DVB_NET_MULTICAST_MAX)
1123                 return -ENOMEM;
1124
1125         memcpy(priv->multi_macs[priv->multi_num], mc->dmi_addr, 6);
1126
1127         priv->multi_num++;
1128         return 0;
1129 }
1130
1131
1132 static void wq_set_multicast_list (struct work_struct *work)
1133 {
1134         struct dvb_net_priv *priv =
1135                 container_of(work, struct dvb_net_priv, set_multicast_list_wq);
1136         struct net_device *dev = priv->net;
1137
1138         dvb_net_feed_stop(dev);
1139         priv->rx_mode = RX_MODE_UNI;
1140         netif_tx_lock_bh(dev);
1141
1142         if (dev->flags & IFF_PROMISC) {
1143                 dprintk("%s: promiscuous mode\n", dev->name);
1144                 priv->rx_mode = RX_MODE_PROMISC;
1145         } else if ((dev->flags & IFF_ALLMULTI)) {
1146                 dprintk("%s: allmulti mode\n", dev->name);
1147                 priv->rx_mode = RX_MODE_ALL_MULTI;
1148         } else if (dev->mc_count) {
1149                 int mci;
1150                 struct dev_mc_list *mc;
1151
1152                 dprintk("%s: set_mc_list, %d entries\n",
1153                         dev->name, dev->mc_count);
1154
1155                 priv->rx_mode = RX_MODE_MULTI;
1156                 priv->multi_num = 0;
1157
1158                 for (mci = 0, mc=dev->mc_list;
1159                      mci < dev->mc_count;
1160                      mc = mc->next, mci++) {
1161                         dvb_set_mc_filter(dev, mc);
1162                 }
1163         }
1164
1165         netif_tx_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 = dev->priv;
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 = dev->priv;
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 = dev->priv;
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 = dev->priv;
1217
1218         priv->in_use--;
1219         return dvb_net_feed_stop(dev);
1220 }
1221
1222 static struct net_device_stats * dvb_net_get_stats(struct net_device *dev)
1223 {
1224         return &((struct dvb_net_priv*) dev->priv)->stats;
1225 }
1226
1227 static void dvb_net_setup(struct net_device *dev)
1228 {
1229         ether_setup(dev);
1230
1231         dev->open               = dvb_net_open;
1232         dev->stop               = dvb_net_stop;
1233         dev->hard_start_xmit    = dvb_net_tx;
1234         dev->get_stats          = dvb_net_get_stats;
1235         dev->set_multicast_list = dvb_net_set_multicast_list;
1236         dev->set_mac_address    = dvb_net_set_mac;
1237         dev->mtu                = 4096;
1238         dev->mc_count           = 0;
1239         dev->hard_header_cache  = NULL;
1240         dev->flags |= IFF_NOARP;
1241 }
1242
1243 static int get_if(struct dvb_net *dvbnet)
1244 {
1245         int i;
1246
1247         for (i=0; i<DVB_NET_DEVICES_MAX; i++)
1248                 if (!dvbnet->state[i])
1249                         break;
1250
1251         if (i == DVB_NET_DEVICES_MAX)
1252                 return -1;
1253
1254         dvbnet->state[i]=1;
1255         return i;
1256 }
1257
1258 static int dvb_net_add_if(struct dvb_net *dvbnet, u16 pid, u8 feedtype)
1259 {
1260         struct net_device *net;
1261         struct dvb_net_priv *priv;
1262         int result;
1263         int if_num;
1264
1265         if (feedtype != DVB_NET_FEEDTYPE_MPE && feedtype != DVB_NET_FEEDTYPE_ULE)
1266                 return -EINVAL;
1267         if ((if_num = get_if(dvbnet)) < 0)
1268                 return -EINVAL;
1269
1270         net = alloc_netdev(sizeof(struct dvb_net_priv), "dvb", dvb_net_setup);
1271         if (!net)
1272                 return -ENOMEM;
1273
1274         if (dvbnet->dvbdev->id)
1275                 snprintf(net->name, IFNAMSIZ, "dvb%d%u%d",
1276                          dvbnet->dvbdev->adapter->num, dvbnet->dvbdev->id, if_num);
1277         else
1278                 /* compatibility fix to keep dvb0_0 format */
1279                 snprintf(net->name, IFNAMSIZ, "dvb%d_%d",
1280                          dvbnet->dvbdev->adapter->num, if_num);
1281
1282         net->addr_len = 6;
1283         memcpy(net->dev_addr, dvbnet->dvbdev->adapter->proposed_mac, 6);
1284
1285         dvbnet->device[if_num] = net;
1286
1287         priv = net->priv;
1288         priv->net = net;
1289         priv->demux = dvbnet->demux;
1290         priv->pid = pid;
1291         priv->rx_mode = RX_MODE_UNI;
1292         priv->need_pusi = 1;
1293         priv->tscc = 0;
1294         priv->feedtype = feedtype;
1295         reset_ule(priv);
1296
1297         INIT_WORK(&priv->set_multicast_list_wq, wq_set_multicast_list);
1298         INIT_WORK(&priv->restart_net_feed_wq, wq_restart_net_feed);
1299         mutex_init(&priv->mutex);
1300
1301         net->base_addr = pid;
1302
1303         if ((result = register_netdev(net)) < 0) {
1304                 dvbnet->device[if_num] = NULL;
1305                 free_netdev(net);
1306                 return result;
1307         }
1308         printk("dvb_net: created network interface %s\n", net->name);
1309
1310         return if_num;
1311 }
1312
1313 static int dvb_net_remove_if(struct dvb_net *dvbnet, unsigned long num)
1314 {
1315         struct net_device *net = dvbnet->device[num];
1316         struct dvb_net_priv *priv;
1317
1318         if (!dvbnet->state[num])
1319                 return -EINVAL;
1320         priv = net->priv;
1321         if (priv->in_use)
1322                 return -EBUSY;
1323
1324         dvb_net_stop(net);
1325         flush_scheduled_work();
1326         printk("dvb_net: removed network interface %s\n", net->name);
1327         unregister_netdev(net);
1328         dvbnet->state[num]=0;
1329         dvbnet->device[num] = NULL;
1330         free_netdev(net);
1331
1332         return 0;
1333 }
1334
1335 static int dvb_net_do_ioctl(struct inode *inode, struct file *file,
1336                   unsigned int cmd, void *parg)
1337 {
1338         struct dvb_device *dvbdev = file->private_data;
1339         struct dvb_net *dvbnet = dvbdev->priv;
1340
1341         if (((file->f_flags&O_ACCMODE)==O_RDONLY))
1342                 return -EPERM;
1343
1344         switch (cmd) {
1345         case NET_ADD_IF:
1346         {
1347                 struct dvb_net_if *dvbnetif = parg;
1348                 int result;
1349
1350                 if (!capable(CAP_SYS_ADMIN))
1351                         return -EPERM;
1352
1353                 if (!try_module_get(dvbdev->adapter->module))
1354                         return -EPERM;
1355
1356                 result=dvb_net_add_if(dvbnet, dvbnetif->pid, dvbnetif->feedtype);
1357                 if (result<0) {
1358                         module_put(dvbdev->adapter->module);
1359                         return result;
1360                 }
1361                 dvbnetif->if_num=result;
1362                 break;
1363         }
1364         case NET_GET_IF:
1365         {
1366                 struct net_device *netdev;
1367                 struct dvb_net_priv *priv_data;
1368                 struct dvb_net_if *dvbnetif = parg;
1369
1370                 if (dvbnetif->if_num >= DVB_NET_DEVICES_MAX ||
1371                     !dvbnet->state[dvbnetif->if_num])
1372                         return -EINVAL;
1373
1374                 netdev = dvbnet->device[dvbnetif->if_num];
1375
1376                 priv_data = netdev->priv;
1377                 dvbnetif->pid=priv_data->pid;
1378                 dvbnetif->feedtype=priv_data->feedtype;
1379                 break;
1380         }
1381         case NET_REMOVE_IF:
1382         {
1383                 int ret;
1384
1385                 if (!capable(CAP_SYS_ADMIN))
1386                         return -EPERM;
1387                 if ((unsigned long) parg >= DVB_NET_DEVICES_MAX)
1388                         return -EINVAL;
1389                 ret = dvb_net_remove_if(dvbnet, (unsigned long) parg);
1390                 if (!ret)
1391                         module_put(dvbdev->adapter->module);
1392                 return ret;
1393         }
1394
1395         /* binary compatiblity cruft */
1396         case __NET_ADD_IF_OLD:
1397         {
1398                 struct __dvb_net_if_old *dvbnetif = parg;
1399                 int result;
1400
1401                 if (!capable(CAP_SYS_ADMIN))
1402                         return -EPERM;
1403
1404                 if (!try_module_get(dvbdev->adapter->module))
1405                         return -EPERM;
1406
1407                 result=dvb_net_add_if(dvbnet, dvbnetif->pid, DVB_NET_FEEDTYPE_MPE);
1408                 if (result<0) {
1409                         module_put(dvbdev->adapter->module);
1410                         return result;
1411                 }
1412                 dvbnetif->if_num=result;
1413                 break;
1414         }
1415         case __NET_GET_IF_OLD:
1416         {
1417                 struct net_device *netdev;
1418                 struct dvb_net_priv *priv_data;
1419                 struct __dvb_net_if_old *dvbnetif = parg;
1420
1421                 if (dvbnetif->if_num >= DVB_NET_DEVICES_MAX ||
1422                     !dvbnet->state[dvbnetif->if_num])
1423                         return -EINVAL;
1424
1425                 netdev = dvbnet->device[dvbnetif->if_num];
1426
1427                 priv_data = netdev->priv;
1428                 dvbnetif->pid=priv_data->pid;
1429                 break;
1430         }
1431         default:
1432                 return -ENOTTY;
1433         }
1434         return 0;
1435 }
1436
1437 static int dvb_net_ioctl(struct inode *inode, struct file *file,
1438               unsigned int cmd, unsigned long arg)
1439 {
1440         return dvb_usercopy(inode, file, cmd, arg, dvb_net_do_ioctl);
1441 }
1442
1443 static int dvb_net_close(struct inode *inode, struct file *file)
1444 {
1445         struct dvb_device *dvbdev = file->private_data;
1446         struct dvb_net *dvbnet = dvbdev->priv;
1447
1448         if (!dvbdev)
1449                 return -ENODEV;
1450
1451         if ((file->f_flags & O_ACCMODE) == O_RDONLY) {
1452                 dvbdev->readers++;
1453         } else {
1454                 dvbdev->writers++;
1455         }
1456
1457         dvbdev->users++;
1458
1459         if(dvbdev->users == 1 && dvbnet->exit==1) {
1460                 fops_put(file->f_op);
1461                 file->f_op = NULL;
1462                 wake_up(&dvbdev->wait_queue);
1463         }
1464         return 0;
1465 }
1466
1467
1468 static struct file_operations dvb_net_fops = {
1469         .owner = THIS_MODULE,
1470         .ioctl = dvb_net_ioctl,
1471         .open = dvb_generic_open,
1472         .release = dvb_net_close,
1473 };
1474
1475 static struct dvb_device dvbdev_net = {
1476         .priv = NULL,
1477         .users = 1,
1478         .writers = 1,
1479         .fops = &dvb_net_fops,
1480 };
1481
1482
1483 void dvb_net_release (struct dvb_net *dvbnet)
1484 {
1485         int i;
1486
1487         dvbnet->exit = 1;
1488         if (dvbnet->dvbdev->users < 1)
1489                 wait_event(dvbnet->dvbdev->wait_queue,
1490                                 dvbnet->dvbdev->users==1);
1491
1492         dvb_unregister_device(dvbnet->dvbdev);
1493
1494         for (i=0; i<DVB_NET_DEVICES_MAX; i++) {
1495                 if (!dvbnet->state[i])
1496                         continue;
1497                 dvb_net_remove_if(dvbnet, i);
1498         }
1499 }
1500 EXPORT_SYMBOL(dvb_net_release);
1501
1502
1503 int dvb_net_init (struct dvb_adapter *adap, struct dvb_net *dvbnet,
1504                   struct dmx_demux *dmx)
1505 {
1506         int i;
1507
1508         dvbnet->demux = dmx;
1509
1510         for (i=0; i<DVB_NET_DEVICES_MAX; i++)
1511                 dvbnet->state[i] = 0;
1512
1513         dvb_register_device (adap, &dvbnet->dvbdev, &dvbdev_net,
1514                              dvbnet, DVB_DEVICE_NET);
1515
1516         return 0;
1517 }
1518 EXPORT_SYMBOL(dvb_net_init);