git.oblomov.eu Git - linux-2.6/blob - 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);