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   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 draft-ietf-ipdvb-ule-03.txt.
  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  */
  46
  47 /*
  48  * FIXME / TODO (dvb_net.c):
  49  *
  50  * Unloading does not work for 2.6.9 kernels: a refcount doesn't go to zero.
  51  *
  52  * TS_FEED callback is called once for every single TS cell although it is
  53  * registered (in dvb_net_feed_start()) for 100 TS cells (used for dvb_net_ule()).
  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/version.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 isprint(c)      ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || (c >= '0' && c <= '9'))
  93
  94 static void hexdump( const unsigned char *buf, unsigned short len )
  95 {
  96         char str[80], octet[10];
  97         int ofs, i, l;
  98
  99         for (ofs = 0; ofs < len; ofs += 16) {
 100                 sprintf( str, "%03d: ", ofs );
 101
 102                 for (i = 0; i < 16; i++) {
 103                         if ((i + ofs) < len)
 104                                 sprintf( octet, "%02x ", buf[ofs + i] );
 105                         else
 106                                 strcpy( octet, "   " );
 107
 108                         strcat( str, octet );
 109                 }
 110                 strcat( str, "  " );
 111                 l = strlen( str );
 112
 113                 for (i = 0; (i < 16) && ((i + ofs) < len); i++)
 114                         str[l++] = isprint( buf[ofs + i] ) ? buf[ofs + i] : '.';
 115
 116                 str[l] = '\0';
 117                 printk( KERN_WARNING "%s\n", str );
 118         }
 119 }
 120
 121 #endif
 122
 123 struct dvb_net_priv {
 124         int in_use;
 125         struct net_device_stats stats;
 126         u16 pid;
 127         struct dvb_net *host;
 128         struct dmx_demux *demux;
 129         struct dmx_section_feed *secfeed;
 130         struct dmx_section_filter *secfilter;
 131         struct dmx_ts_feed *tsfeed;
 132         int multi_num;
 133         struct dmx_section_filter *multi_secfilter[DVB_NET_MULTICAST_MAX];
 134         unsigned char multi_macs[DVB_NET_MULTICAST_MAX][6];
 135         int rx_mode;
 136 #define RX_MODE_UNI 0
 137 #define RX_MODE_MULTI 1
 138 #define RX_MODE_ALL_MULTI 2
 139 #define RX_MODE_PROMISC 3
 140         struct work_struct set_multicast_list_wq;
 141         struct work_struct restart_net_feed_wq;
 142         unsigned char feedtype;                 /* Either FEED_TYPE_ or FEED_TYPE_ULE */
 143         int need_pusi;                          /* Set to 1, if synchronization on PUSI required. */
 144         unsigned char tscc;                     /* TS continuity counter after sync on PUSI. */
 145         struct sk_buff *ule_skb;                /* ULE SNDU decodes into this buffer. */
 146         unsigned char *ule_next_hdr;            /* Pointer into skb to next ULE extension header. */
 147         unsigned short ule_sndu_len;            /* ULE SNDU length in bytes, w/o D-Bit. */
 148         unsigned short ule_sndu_type;           /* ULE SNDU type field, complete. */
 149         unsigned char ule_sndu_type_1;          /* ULE SNDU type field, if split across 2 TS cells. */
 150         unsigned char ule_dbit;                 /* Whether the DestMAC address present
 151                                                  * or not (bit is set). */
 152         unsigned char ule_bridged;              /* Whether the ULE_BRIDGED extension header was found. */
 153         int ule_sndu_remain;                    /* Nr. of bytes still required for current ULE SNDU. */
 154         unsigned long ts_count;                 /* Current ts cell counter. */
 155 };
 156
 157
 158 /**
 159  *      Determine the packet's protocol ID. The rule here is that we
 160  *      assume 802.3 if the type field is short enough to be a length.
 161  *      This is normal practice and works for any 'now in use' protocol.
 162  *
 163  *  stolen from eth.c out of the linux kernel, hacked for dvb-device
 164  *  by Michael Holzt <kju@debian.org>
 165  */
 166 static unsigned short dvb_net_eth_type_trans(struct sk_buff *skb,
 167                                       struct net_device *dev)
 168 {
 169         struct ethhdr *eth;
 170         unsigned char *rawp;
 171
 172         skb->mac.raw=skb->data;
 173         skb_pull(skb,dev->hard_header_len);
 174 #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,8)
 175         eth = skb->mac.ethernet;
 176 #else
 177         eth = eth_hdr(skb);
 178 #endif
 179
 180         if (*eth->h_dest & 1) {
 181                 if(memcmp(eth->h_dest,dev->broadcast, ETH_ALEN)==0)
 182                         skb->pkt_type=PACKET_BROADCAST;
 183                 else
 184                         skb->pkt_type=PACKET_MULTICAST;
 185         }
 186
 187         if (ntohs(eth->h_proto) >= 1536)
 188                 return eth->h_proto;
 189
 190         rawp = skb->data;
 191
 192         /**
 193          *      This is a magic hack to spot IPX packets. Older Novell breaks
 194          *      the protocol design and runs IPX over 802.3 without an 802.2 LLC
 195          *      layer. We look for FFFF which isn't a used 802.2 SSAP/DSAP. This
 196          *      won't work for fault tolerant netware but does for the rest.
 197          */
 198         if (*(unsigned short *)rawp == 0xFFFF)
 199                 return htons(ETH_P_802_3);
 200
 201         /**
 202          *      Real 802.2 LLC
 203          */
 204         return htons(ETH_P_802_2);
 205 }
 206
 207 #define TS_SZ   188
 208 #define TS_SYNC 0x47
 209 #define TS_TEI  0x80
 210 #define TS_SC   0xC0
 211 #define TS_PUSI 0x40
 212 #define TS_AF_A 0x20
 213 #define TS_AF_D 0x10
 214
 215 /* ULE Extension Header handlers. */
 216
 217 #define ULE_TEST        0
 218 #define ULE_BRIDGED     1
 219
 220 static int ule_test_sndu( struct dvb_net_priv *p )
 221 {
 222         return -1;
 223 }
 224
 225 static int ule_bridged_sndu( struct dvb_net_priv *p )
 226 {
 227         /* BRIDGE SNDU handling sucks in draft-ietf-ipdvb-ule-03.txt.
 228          * This has to be the last extension header, otherwise it won't work.
 229          * Blame the authors!
 230          */
 231         p->ule_bridged = 1;
 232         return 0;
 233 }
 234
 235
 236 /** Handle ULE extension headers.
 237  *  Function is called after a successful CRC32 verification of an ULE SNDU to complete its decoding.
 238  *  Returns: >= 0: nr. of bytes consumed by next extension header
 239  *           -1:   Mandatory extension header that is not recognized or TEST SNDU; discard.
 240  */
 241 static int handle_one_ule_extension( struct dvb_net_priv *p )
 242 {
 243         /* Table of mandatory extension header handlers.  The header type is the index. */
 244         static int (*ule_mandatory_ext_handlers[255])( struct dvb_net_priv *p ) =
 245                 { [0] = ule_test_sndu, [1] = ule_bridged_sndu, [2] = NULL,  };
 246
 247         /* Table of optional extension header handlers.  The header type is the index. */
 248         static int (*ule_optional_ext_handlers[255])( struct dvb_net_priv *p ) = { NULL, };
 249
 250         int ext_len = 0;
 251         unsigned char hlen = (p->ule_sndu_type & 0x0700) >> 8;
 252         unsigned char htype = p->ule_sndu_type & 0x00FF;
 253
 254         /* Discriminate mandatory and optional extension headers. */
 255         if (hlen == 0) {
 256                 /* Mandatory extension header */
 257                 if (ule_mandatory_ext_handlers[htype]) {
 258                         ext_len = ule_mandatory_ext_handlers[htype]( p );
 259                         p->ule_next_hdr += ext_len;
 260                         if (! p->ule_bridged) {
 261                                 p->ule_sndu_type = ntohs( *(unsigned short *)p->ule_next_hdr );
 262                                 p->ule_next_hdr += 2;
 263                         } else {
 264                                 p->ule_sndu_type = ntohs( *(unsigned short *)(p->ule_next_hdr + ((p->ule_dbit ? 2 : 3) * ETH_ALEN)) );
 265                                 /* This assures the extension handling loop will terminate. */
 266                         }
 267                 } else
 268                         ext_len = -1;   /* SNDU has to be discarded. */
 269         } else {
 270                 /* Optional extension header.  Calculate the length. */
 271                 ext_len = hlen << 2;
 272                 /* Process the optional extension header according to its type. */
 273                 if (ule_optional_ext_handlers[htype])
 274                         (void)ule_optional_ext_handlers[htype]( p );
 275                 p->ule_next_hdr += ext_len;
 276                 p->ule_sndu_type = ntohs( *(unsigned short *)p->ule_next_hdr );
 277                 p->ule_next_hdr += 2;
 278         }
 279
 280         return ext_len;
 281 }
 282
 283 static int handle_ule_extensions( struct dvb_net_priv *p )
 284 {
 285         int total_ext_len = 0, l;
 286
 287         p->ule_next_hdr = p->ule_skb->data;
 288         do {
 289                 l = handle_one_ule_extension( p );
 290                 if (l == -1) return -1; /* Stop extension header processing and discard SNDU. */
 291                 total_ext_len += l;
 292
 293         } while (p->ule_sndu_type < 1536);
 294
 295         return total_ext_len;
 296 }
 297
 298
 299 /** Prepare for a new ULE SNDU: reset the decoder state. */
 300 static inline void reset_ule( struct dvb_net_priv *p )
 301 {
 302         p->ule_skb = NULL;
 303         p->ule_next_hdr = NULL;
 304         p->ule_sndu_len = 0;
 305         p->ule_sndu_type = 0;
 306         p->ule_sndu_type_1 = 0;
 307         p->ule_sndu_remain = 0;
 308         p->ule_dbit = 0xFF;
 309         p->ule_bridged = 0;
 310 }
 311
 312 /**
 313  * Decode ULE SNDUs according to draft-ietf-ipdvb-ule-03.txt from a sequence of
 314  * TS cells of a single PID.
 315  */
 316 static void dvb_net_ule( struct net_device *dev, const u8 *buf, size_t buf_len )
 317 {
 318         struct dvb_net_priv *priv = dev->priv;
 319         unsigned long skipped = 0L;
 320         u8 *ts, *ts_end, *from_where = NULL, ts_remain = 0, how_much = 0, new_ts = 1;
 321         struct ethhdr *ethh = NULL;
 322
 323 #ifdef ULE_DEBUG
 324         /* The code inside ULE_DEBUG keeps a history of the last 100 TS cells processed. */
 325         static unsigned char ule_hist[100*TS_SZ];
 326         static unsigned char *ule_where = ule_hist, ule_dump = 0;
 327 #endif
 328
 329         if (dev == NULL) {
 330                 printk( KERN_ERR "NO netdev struct!\n" );
 331                 return;
 332         }
 333
 334         /* For all TS cells in current buffer.
 335          * Appearently, we are called for every single TS cell.
 336          */
 337         for (ts = (char *)buf, ts_end = (char *)buf + buf_len; ts < ts_end; /* no default incr. */ ) {
 338
 339                 if (new_ts) {
 340                         /* We are about to process a new TS cell. */
 341
 342 #ifdef ULE_DEBUG
 343                         if (ule_where >= &ule_hist[100*TS_SZ]) ule_where = ule_hist;
 344                         memcpy( ule_where, ts, TS_SZ );
 345                         if (ule_dump) {
 346                                 hexdump( ule_where, TS_SZ );
 347                                 ule_dump = 0;
 348                         }
 349                         ule_where += TS_SZ;
 350 #endif
 351
 352                         /* Check TS error conditions: sync_byte, transport_error_indicator, scrambling_control . */
 353                         if ((ts[0] != TS_SYNC) || (ts[1] & TS_TEI) || ((ts[3] & TS_SC) != 0)) {
 354                                 printk(KERN_WARNING "%lu: Invalid TS cell: SYNC %#x, TEI %u, SC %#x.\n",
 355                                        priv->ts_count, ts[0], ts[1] & TS_TEI >> 7, ts[3] & 0xC0 >> 6);
 356
 357                                 /* Drop partly decoded SNDU, reset state, resync on PUSI. */
 358                                 if (priv->ule_skb) {
 359                                         dev_kfree_skb( priv->ule_skb );
 360                                         /* Prepare for next SNDU. */
 361                                         ((struct dvb_net_priv *) dev->priv)->stats.rx_errors++;
 362                                         ((struct dvb_net_priv *) dev->priv)->stats.rx_frame_errors++;
 363                                 }
 364                                 reset_ule(priv);
 365                                 priv->need_pusi = 1;
 366
 367                                 /* Continue with next TS cell. */
 368                                 ts += TS_SZ;
 369                                 priv->ts_count++;
 370                                 continue;
 371                         }
 372
 373                         ts_remain = 184;
 374                         from_where = ts + 4;
 375                 }
 376                 /* Synchronize on PUSI, if required. */
 377                 if (priv->need_pusi) {
 378                         if (ts[1] & TS_PUSI) {
 379                                 /* Find beginning of first ULE SNDU in current TS cell. */
 380                                 /* Synchronize continuity counter. */
 381                                 priv->tscc = ts[3] & 0x0F;
 382                                 /* There is a pointer field here. */
 383                                 if (ts[4] > ts_remain) {
 384                                         printk(KERN_ERR "%lu: Invalid ULE packet "
 385                                                "(pointer field %d)\n", priv->ts_count, ts[4]);
 386                                         ts += TS_SZ;
 387                                         priv->ts_count++;
 388                                         continue;
 389                                 }
 390                                 /* Skip to destination of pointer field. */
 391                                 from_where = &ts[5] + ts[4];
 392                                 ts_remain -= 1 + ts[4];
 393                                 skipped = 0;
 394                         } else {
 395                                 skipped++;
 396                                 ts += TS_SZ;
 397                                 priv->ts_count++;
 398                                 continue;
 399                         }
 400                 }
 401
 402                 /* Check continuity counter. */
 403                 if (new_ts) {
 404                         if ((ts[3] & 0x0F) == priv->tscc)
 405                                 priv->tscc = (priv->tscc + 1) & 0x0F;
 406                         else {
 407                                 /* TS discontinuity handling: */
 408                                 printk(KERN_WARNING "%lu: TS discontinuity: got %#x, "
 409                                        "exptected %#x.\n", priv->ts_count, ts[3] & 0x0F, priv->tscc);
 410                                 /* Drop partly decoded SNDU, reset state, resync on PUSI. */
 411                                 if (priv->ule_skb) {
 412                                         dev_kfree_skb( priv->ule_skb );
 413                                         /* Prepare for next SNDU. */
 414                                         // reset_ule(priv);  moved to below.
 415                                         ((struct dvb_net_priv *) dev->priv)->stats.rx_errors++;
 416                                         ((struct dvb_net_priv *) dev->priv)->stats.rx_frame_errors++;
 417                                 }
 418                                 reset_ule(priv);
 419                                 /* skip to next PUSI. */
 420                                 priv->need_pusi = 1;
 421                                 ts += TS_SZ;
 422                                 priv->ts_count++;
 423                                 continue;
 424                         }
 425                         /* If we still have an incomplete payload, but PUSI is
 426                          * set; some TS cells are missing.
 427                          * This is only possible here, if we missed exactly 16 TS
 428                          * cells (continuity counter wrap). */
 429                         if (ts[1] & TS_PUSI) {
 430                                 if (! priv->need_pusi) {
 431                                         if (*from_where > 181) {
 432                                                 /* Pointer field is invalid.  Drop this TS cell and any started ULE SNDU. */
 433                                                 printk(KERN_WARNING "%lu: Invalid pointer "
 434                                                        "field: %u.\n", priv->ts_count, *from_where);
 435
 436                                                 /* Drop partly decoded SNDU, reset state, resync on PUSI. */
 437                                                 if (priv->ule_skb) {
 438                                                         dev_kfree_skb( priv->ule_skb );
 439                                                         ((struct dvb_net_priv *) dev->priv)->stats.rx_errors++;
 440                                                         ((struct dvb_net_priv *) dev->priv)->stats.rx_frame_errors++;
 441                                                 }
 442                                                 reset_ule(priv);
 443                                                 priv->need_pusi = 1;
 444                                                 ts += TS_SZ;
 445                                                 priv->ts_count++;
 446                                                 continue;
 447                                         }
 448                                         /* Skip pointer field (we're processing a
 449                                          * packed payload). */
 450                                         from_where += 1;
 451                                         ts_remain -= 1;
 452                                 } else
 453                                         priv->need_pusi = 0;
 454
 455                                 if (priv->ule_sndu_remain > 183) {
 456                                         /* Current SNDU lacks more data than there could be available in the
 457                                          * current TS cell. */
 458                                         ((struct dvb_net_priv *) dev->priv)->stats.rx_errors++;
 459                                         ((struct dvb_net_priv *) dev->priv)->stats.rx_length_errors++;
 460                                         printk(KERN_WARNING "%lu: Expected %d more SNDU bytes, but "
 461                                                "got PUSI (pf %d, ts_remain %d).  Flushing incomplete payload.\n",
 462                                                priv->ts_count, priv->ule_sndu_remain, ts[4], ts_remain);
 463                                         dev_kfree_skb(priv->ule_skb);
 464                                         /* Prepare for next SNDU. */
 465                                         reset_ule(priv);
 466                                         /* Resync: go to where pointer field points to: start of next ULE SNDU. */
 467                                         from_where += ts[4];
 468                                         ts_remain -= ts[4];
 469                                 }
 470                         }
 471                 }
 472
 473                 /* Check if new payload needs to be started. */
 474                 if (priv->ule_skb == NULL) {
 475                         /* Start a new payload with skb.
 476                          * Find ULE header.  It is only guaranteed that the
 477                          * length field (2 bytes) is contained in the current
 478                          * TS.
 479                          * Check ts_remain has to be >= 2 here. */
 480                         if (ts_remain < 2) {
 481                                 printk(KERN_WARNING "Invalid payload packing: only %d "
 482                                        "bytes left in TS.  Resyncing.\n", ts_remain);
 483                                 priv->ule_sndu_len = 0;
 484                                 priv->need_pusi = 1;
 485                                 continue;
 486                         }
 487
 488                         if (! priv->ule_sndu_len) {
 489                                 /* Got at least two bytes, thus extrace the SNDU length. */
 490                                 priv->ule_sndu_len = from_where[0] << 8 | from_where[1];
 491                                 if (priv->ule_sndu_len & 0x8000) {
 492                                         /* D-Bit is set: no dest mac present. */
 493                                         priv->ule_sndu_len &= 0x7FFF;
 494                                         priv->ule_dbit = 1;
 495                                 } else
 496                                         priv->ule_dbit = 0;
 497
 498                                 if (priv->ule_sndu_len > 32763) {
 499                                         printk(KERN_WARNING "%lu: Invalid ULE SNDU length %u. "
 500                                                "Resyncing.\n", priv->ts_count, priv->ule_sndu_len);
 501                                         priv->ule_sndu_len = 0;
 502                                         priv->need_pusi = 1;
 503                                         new_ts = 1;
 504                                         ts += TS_SZ;
 505                                         priv->ts_count++;
 506                                         continue;
 507                                 }
 508                                 ts_remain -= 2; /* consume the 2 bytes SNDU length. */
 509                                 from_where += 2;
 510                         }
 511
 512                         /*
 513                          * State of current TS:
 514                          *   ts_remain (remaining bytes in the current TS cell)
 515                          *   0  ule_type is not available now, we need the next TS cell
 516                          *   1  the first byte of the ule_type is present
 517                          * >=2  full ULE header present, maybe some payload data as well.
 518                          */
 519                         switch (ts_remain) {
 520                                 case 1:
 521                                         priv->ule_sndu_type = from_where[0] << 8;
 522                                         priv->ule_sndu_type_1 = 1; /* first byte of ule_type is set. */
 523                                         ts_remain -= 1; from_where += 1;
 524                                         /* Continue w/ next TS. */
 525                                 case 0:
 526                                         new_ts = 1;
 527                                         ts += TS_SZ;
 528                                         priv->ts_count++;
 529                                         continue;
 530
 531                                 default: /* complete ULE header is present in current TS. */
 532                                         /* Extract ULE type field. */
 533                                         if (priv->ule_sndu_type_1) {
 534                                                 priv->ule_sndu_type |= from_where[0];
 535                                                 from_where += 1; /* points to payload start. */
 536                                                 ts_remain -= 1;
 537                                         } else {
 538                                                 /* Complete type is present in new TS. */
 539                                                 priv->ule_sndu_type = from_where[0] << 8 | from_where[1];
 540                                                 from_where += 2; /* points to payload start. */
 541                                                 ts_remain -= 2;
 542                                         }
 543                                         break;
 544                         }
 545
 546                         /* Allocate the skb (decoder target buffer) with the correct size, as follows:
 547                          * prepare for the largest case: bridged SNDU with MAC address (dbit = 0). */
 548                         priv->ule_skb = dev_alloc_skb( priv->ule_sndu_len + ETH_HLEN + ETH_ALEN );
 549                         if (priv->ule_skb == NULL) {
 550                                 printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n",
 551                                        dev->name);
 552                                 ((struct dvb_net_priv *)dev->priv)->stats.rx_dropped++;
 553                                 return;
 554                         }
 555
 556                         /* This includes the CRC32 _and_ dest mac, if !dbit. */
 557                         priv->ule_sndu_remain = priv->ule_sndu_len;
 558                         priv->ule_skb->dev = dev;
 559                         /* Leave space for Ethernet or bridged SNDU header (eth hdr plus one MAC addr). */
 560                         skb_reserve( priv->ule_skb, ETH_HLEN + ETH_ALEN );
 561                 }
 562
 563                 /* Copy data into our current skb. */
 564                 how_much = min(priv->ule_sndu_remain, (int)ts_remain);
 565                 memcpy(skb_put(priv->ule_skb, how_much), from_where, how_much);
 566                 priv->ule_sndu_remain -= how_much;
 567                 ts_remain -= how_much;
 568                 from_where += how_much;
 569
 570                 /* Check for complete payload. */
 571                 if (priv->ule_sndu_remain <= 0) {
 572                         /* Check CRC32, we've got it in our skb already. */
 573                         unsigned short ulen = htons(priv->ule_sndu_len);
 574                         unsigned short utype = htons(priv->ule_sndu_type);
 575                         struct kvec iov[3] = {
 576                                 { &ulen, sizeof ulen },
 577                                 { &utype, sizeof utype },
 578                                 { priv->ule_skb->data, priv->ule_skb->len - 4 }
 579                         };
 580                         unsigned long ule_crc = ~0L, expected_crc;
 581                         if (priv->ule_dbit) {
 582                                 /* Set D-bit for CRC32 verification,
 583                                  * if it was set originally. */
 584                                 ulen |= 0x0080;
 585                         }
 586
 587                         ule_crc = iov_crc32(ule_crc, iov, 3);
 588                         expected_crc = *((u8 *)priv->ule_skb->tail - 4) << 24 |
 589                                        *((u8 *)priv->ule_skb->tail - 3) << 16 |
 590                                        *((u8 *)priv->ule_skb->tail - 2) << 8 |
 591                                        *((u8 *)priv->ule_skb->tail - 1);
 592                         if (ule_crc != expected_crc) {
 593                                 printk(KERN_WARNING "%lu: CRC32 check FAILED: %#lx / %#lx, SNDU len %d type %#x, ts_remain %d, next 2: %x.\n",
 594                                        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);
 595
 596 #ifdef ULE_DEBUG
 597                                 hexdump( iov[0].iov_base, iov[0].iov_len );
 598                                 hexdump( iov[1].iov_base, iov[1].iov_len );
 599                                 hexdump( iov[2].iov_base, iov[2].iov_len );
 600
 601                                 if (ule_where == ule_hist) {
 602                                         hexdump( &ule_hist[98*TS_SZ], TS_SZ );
 603                                         hexdump( &ule_hist[99*TS_SZ], TS_SZ );
 604                                 } else if (ule_where == &ule_hist[TS_SZ]) {
 605                                         hexdump( &ule_hist[99*TS_SZ], TS_SZ );
 606                                         hexdump( ule_hist, TS_SZ );
 607                                 } else {
 608                                         hexdump( ule_where - TS_SZ - TS_SZ, TS_SZ );
 609                                         hexdump( ule_where - TS_SZ, TS_SZ );
 610                                 }
 611                                 ule_dump = 1;
 612 #endif
 613
 614                                 ((struct dvb_net_priv *) dev->priv)->stats.rx_errors++;
 615                                 ((struct dvb_net_priv *) dev->priv)->stats.rx_crc_errors++;
 616                                 dev_kfree_skb(priv->ule_skb);
 617                         } else {
 618                                 /* CRC32 verified OK. */
 619                                 /* Handle ULE Extension Headers. */
 620                                 if (priv->ule_sndu_type < 1536) {
 621                                         /* There is an extension header.  Handle it accordingly. */
 622                                         int l = handle_ule_extensions( priv );
 623                                         if (l < 0) {
 624                                                 /* Mandatory extension header unknown or TEST SNDU.  Drop it. */
 625                                                 // printk( KERN_WARNING "Dropping SNDU, extension headers.\n" );
 626                                                 dev_kfree_skb( priv->ule_skb );
 627                                                 goto sndu_done;
 628                                         }
 629                                         skb_pull( priv->ule_skb, l );
 630                                 }
 631
 632                                 /* CRC32 was OK. Remove it from skb. */
 633                                 priv->ule_skb->tail -= 4;
 634                                 priv->ule_skb->len -= 4;
 635
 636                                 /* Filter on receiver's destination MAC address, if present. */
 637                                 if (!priv->ule_dbit) {
 638                                         /* The destination MAC address is the next data in the skb. */
 639                                         if (memcmp( priv->ule_skb->data, dev->dev_addr, ETH_ALEN )) {
 640                                                 /* MAC addresses don't match.  Drop SNDU. */
 641                                                 // printk( KERN_WARNING "Dropping SNDU, MAC address.\n" );
 642                                                 dev_kfree_skb( priv->ule_skb );
 643                                                 goto sndu_done;
 644                                         }
 645                                         if (! priv->ule_bridged) {
 646                                                 skb_push( priv->ule_skb, ETH_ALEN + 2 );
 647                                                 ethh = (struct ethhdr *)priv->ule_skb->data;
 648                                                 memcpy( ethh->h_dest, ethh->h_source, ETH_ALEN );
 649                                                 memset( ethh->h_source, 0, ETH_ALEN );
 650                                                 ethh->h_proto = htons( priv->ule_sndu_type );
 651                                         } else {
 652                                                 /* Skip the Receiver destination MAC address. */
 653                                                 skb_pull( priv->ule_skb, ETH_ALEN );
 654                                         }
 655                                 } else {
 656                                         if (! priv->ule_bridged) {
 657                                                 skb_push( priv->ule_skb, ETH_HLEN );
 658                                                 ethh = (struct ethhdr *)priv->ule_skb->data;
 659                                                 memcpy( ethh->h_dest, dev->dev_addr, ETH_ALEN );
 660                                                 memset( ethh->h_source, 0, ETH_ALEN );
 661                                                 ethh->h_proto = htons( priv->ule_sndu_type );
 662                                         } else {
 663                                                 /* skb is in correct state; nothing to do. */
 664                                         }
 665                                 }
 666                                 priv->ule_bridged = 0;
 667
 668                                 /* Stuff into kernel's protocol stack. */
 669                                 priv->ule_skb->protocol = dvb_net_eth_type_trans(priv->ule_skb, dev);
 670                                 /* If D-bit is set (i.e. destination MAC address not present),
 671                                  * receive the packet anyhow. */
 672                                 /* if (priv->ule_dbit && skb->pkt_type == PACKET_OTHERHOST)
 673                                         priv->ule_skb->pkt_type = PACKET_HOST; */
 674                                 ((struct dvb_net_priv *) dev->priv)->stats.rx_packets++;
 675                                 ((struct dvb_net_priv *) dev->priv)->stats.rx_bytes += priv->ule_skb->len;
 676                                 netif_rx(priv->ule_skb);
 677                         }
 678                         sndu_done:
 679                         /* Prepare for next SNDU. */
 680                         reset_ule(priv);
 681                 }
 682
 683                 /* More data in current TS (look at the bytes following the CRC32)? */
 684                 if (ts_remain >= 2 && *((unsigned short *)from_where) != 0xFFFF) {
 685                         /* Next ULE SNDU starts right there. */
 686                         new_ts = 0;
 687                         priv->ule_skb = NULL;
 688                         priv->ule_sndu_type_1 = 0;
 689                         priv->ule_sndu_len = 0;
 690                         // printk(KERN_WARNING "More data in current TS: [%#x %#x %#x %#x]\n",
 691                         //      *(from_where + 0), *(from_where + 1),
 692                         //      *(from_where + 2), *(from_where + 3));
 693                         // printk(KERN_WARNING "ts @ %p, stopped @ %p:\n", ts, from_where + 0);
 694                         // hexdump(ts, 188);
 695                 } else {
 696                         new_ts = 1;
 697                         ts += TS_SZ;
 698                         priv->ts_count++;
 699                         if (priv->ule_skb == NULL) {
 700                                 priv->need_pusi = 1;
 701                                 priv->ule_sndu_type_1 = 0;
 702                                 priv->ule_sndu_len = 0;
 703                         }
 704                 }
 705         }       /* for all available TS cells */
 706 }
 707
 708 static int dvb_net_ts_callback(const u8 *buffer1, size_t buffer1_len,
 709                                const u8 *buffer2, size_t buffer2_len,
 710                                struct dmx_ts_feed *feed, enum dmx_success success)
 711 {
 712         struct net_device *dev = feed->priv;
 713
 714         if (buffer2 != 0)
 715                 printk(KERN_WARNING "buffer2 not 0: %p.\n", buffer2);
 716         if (buffer1_len > 32768)
 717                 printk(KERN_WARNING "length > 32k: %zu.\n", buffer1_len);
 718         /* printk("TS callback: %u bytes, %u TS cells @ %p.\n",
 719                   buffer1_len, buffer1_len / TS_SZ, buffer1); */
 720         dvb_net_ule(dev, buffer1, buffer1_len);
 721         return 0;
 722 }
 723
 724
 725 static void dvb_net_sec(struct net_device *dev, u8 *pkt, int pkt_len)
 726 {
 727         u8 *eth;
 728         struct sk_buff *skb;
 729         struct net_device_stats *stats = &(((struct dvb_net_priv *) dev->priv)->stats);
 730
 731         /* note: pkt_len includes a 32bit checksum */
 732         if (pkt_len < 16) {
 733                 printk("%s: IP/MPE packet length = %d too small.\n",
 734                         dev->name, pkt_len);
 735                 stats->rx_errors++;
 736                 stats->rx_length_errors++;
 737                 return;
 738         }
 739 /* it seems some ISPs manage to screw up here, so we have to
 740  * relax the error checks... */
 741 #if 0
 742         if ((pkt[5] & 0xfd) != 0xc1) {
 743                 /* drop scrambled or broken packets */
 744 #else
 745         if ((pkt[5] & 0x3c) != 0x00) {
 746                 /* drop scrambled */
 747 #endif
 748                 stats->rx_errors++;
 749                 stats->rx_crc_errors++;
 750                 return;
 751         }
 752         if (pkt[5] & 0x02) {
 753                 //FIXME: handle LLC/SNAP
 754                 stats->rx_dropped++;
 755                 return;
 756         }
 757         if (pkt[7]) {
 758                 /* FIXME: assemble datagram from multiple sections */
 759                 stats->rx_errors++;
 760                 stats->rx_frame_errors++;
 761                 return;
 762         }
 763
 764         /* we have 14 byte ethernet header (ip header follows);
 765          * 12 byte MPE header; 4 byte checksum; + 2 byte alignment
 766          */
 767         if (!(skb = dev_alloc_skb(pkt_len - 4 - 12 + 14 + 2))) {
 768                 //printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n", dev->name);
 769                 stats->rx_dropped++;
 770                 return;
 771         }
 772         skb_reserve(skb, 2);    /* longword align L3 header */
 773         skb->dev = dev;
 774
 775         /* copy L3 payload */
 776         eth = (u8 *) skb_put(skb, pkt_len - 12 - 4 + 14);
 777         memcpy(eth + 14, pkt + 12, pkt_len - 12 - 4);
 778
 779         /* create ethernet header: */
 780         eth[0]=pkt[0x0b];
 781         eth[1]=pkt[0x0a];
 782         eth[2]=pkt[0x09];
 783         eth[3]=pkt[0x08];
 784         eth[4]=pkt[0x04];
 785         eth[5]=pkt[0x03];
 786
 787         eth[6]=eth[7]=eth[8]=eth[9]=eth[10]=eth[11]=0;
 788
 789         eth[12] = 0x08; /* ETH_P_IP */
 790         eth[13] = 0x00;
 791
 792         skb->protocol = dvb_net_eth_type_trans(skb, dev);
 793
 794         stats->rx_packets++;
 795         stats->rx_bytes+=skb->len;
 796         netif_rx(skb);
 797 }
 798
 799 static int dvb_net_sec_callback(const u8 *buffer1, size_t buffer1_len,
 800                  const u8 *buffer2, size_t buffer2_len,
 801                  struct dmx_section_filter *filter,
 802                  enum dmx_success success)
 803 {
 804         struct net_device *dev = filter->priv;
 805
 806         /**
 807          * we rely on the DVB API definition where exactly one complete
 808          * section is delivered in buffer1
 809          */
 810         dvb_net_sec (dev, (u8*) buffer1, buffer1_len);
 811         return 0;
 812 }
 813
 814 static int dvb_net_tx(struct sk_buff *skb, struct net_device *dev)
 815 {
 816         dev_kfree_skb(skb);
 817         return 0;
 818 }
 819
 820 static u8 mask_normal[6]={0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
 821 static u8 mask_allmulti[6]={0xff, 0xff, 0xff, 0x00, 0x00, 0x00};
 822 static u8 mac_allmulti[6]={0x01, 0x00, 0x5e, 0x00, 0x00, 0x00};
 823 static u8 mask_promisc[6]={0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
 824
 825 static int dvb_net_filter_sec_set(struct net_device *dev,
 826                    struct dmx_section_filter **secfilter,
 827                    u8 *mac, u8 *mac_mask)
 828 {
 829         struct dvb_net_priv *priv = dev->priv;
 830         int ret;
 831
 832         *secfilter=NULL;
 833         ret = priv->secfeed->allocate_filter(priv->secfeed, secfilter);
 834         if (ret<0) {
 835                 printk("%s: could not get filter\n", dev->name);
 836                 return ret;
 837         }
 838
 839         (*secfilter)->priv=(void *) dev;
 840
 841         memset((*secfilter)->filter_value, 0x00, DMX_MAX_FILTER_SIZE);
 842         memset((*secfilter)->filter_mask,  0x00, DMX_MAX_FILTER_SIZE);
 843         memset((*secfilter)->filter_mode,  0xff, DMX_MAX_FILTER_SIZE);
 844
 845         (*secfilter)->filter_value[0]=0x3e;
 846         (*secfilter)->filter_value[3]=mac[5];
 847         (*secfilter)->filter_value[4]=mac[4];
 848         (*secfilter)->filter_value[8]=mac[3];
 849         (*secfilter)->filter_value[9]=mac[2];
 850         (*secfilter)->filter_value[10]=mac[1];
 851         (*secfilter)->filter_value[11]=mac[0];
 852
 853         (*secfilter)->filter_mask[0] = 0xff;
 854         (*secfilter)->filter_mask[3] = mac_mask[5];
 855         (*secfilter)->filter_mask[4] = mac_mask[4];
 856         (*secfilter)->filter_mask[8] = mac_mask[3];
 857         (*secfilter)->filter_mask[9] = mac_mask[2];
 858         (*secfilter)->filter_mask[10] = mac_mask[1];
 859         (*secfilter)->filter_mask[11]=mac_mask[0];
 860
 861         dprintk("%s: filter mac=%02x %02x %02x %02x %02x %02x\n",
 862                dev->name, mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
 863         dprintk("%s: filter mask=%02x %02x %02x %02x %02x %02x\n",
 864                dev->name, mac_mask[0], mac_mask[1], mac_mask[2],
 865                mac_mask[3], mac_mask[4], mac_mask[5]);
 866
 867         return 0;
 868 }
 869
 870 static int dvb_net_feed_start(struct net_device *dev)
 871 {
 872         int ret, i;
 873         struct dvb_net_priv *priv = dev->priv;
 874         struct dmx_demux *demux = priv->demux;
 875         unsigned char *mac = (unsigned char *) dev->dev_addr;
 876
 877         dprintk("%s: rx_mode %i\n", __FUNCTION__, priv->rx_mode);
 878         if (priv->tsfeed || priv->secfeed || priv->secfilter || priv->multi_secfilter[0])
 879                 printk("%s: BUG %d\n", __FUNCTION__, __LINE__);
 880
 881         priv->secfeed=NULL;
 882         priv->secfilter=NULL;
 883         priv->tsfeed = NULL;
 884
 885         if (priv->feedtype == DVB_NET_FEEDTYPE_MPE) {
 886                 dprintk("%s: alloc secfeed\n", __FUNCTION__);
 887                 ret=demux->allocate_section_feed(demux, &priv->secfeed,
 888                                          dvb_net_sec_callback);
 889                 if (ret<0) {
 890                         printk("%s: could not allocate section feed\n", dev->name);
 891                         return ret;
 892                 }
 893
 894                 ret = priv->secfeed->set(priv->secfeed, priv->pid, 32768, 0, 1);
 895
 896                 if (ret<0) {
 897                         printk("%s: could not set section feed\n", dev->name);
 898                         priv->demux->release_section_feed(priv->demux, priv->secfeed);
 899                         priv->secfeed=NULL;
 900                         return ret;
 901                 }
 902
 903                 if (priv->rx_mode != RX_MODE_PROMISC) {
 904                         dprintk("%s: set secfilter\n", __FUNCTION__);
 905                         dvb_net_filter_sec_set(dev, &priv->secfilter, mac, mask_normal);
 906                 }
 907
 908                 switch (priv->rx_mode) {
 909                 case RX_MODE_MULTI:
 910                         for (i = 0; i < priv->multi_num; i++) {
 911                                 dprintk("%s: set multi_secfilter[%d]\n", __FUNCTION__, i);
 912                                 dvb_net_filter_sec_set(dev, &priv->multi_secfilter[i],
 913                                                        priv->multi_macs[i], mask_normal);
 914                         }
 915                         break;
 916                 case RX_MODE_ALL_MULTI:
 917                         priv->multi_num=1;
 918                         dprintk("%s: set multi_secfilter[0]\n", __FUNCTION__);
 919                         dvb_net_filter_sec_set(dev, &priv->multi_secfilter[0],
 920                                                mac_allmulti, mask_allmulti);
 921                         break;
 922                 case RX_MODE_PROMISC:
 923                         priv->multi_num=0;
 924                         dprintk("%s: set secfilter\n", __FUNCTION__);
 925                         dvb_net_filter_sec_set(dev, &priv->secfilter, mac, mask_promisc);
 926                         break;
 927                 }
 928
 929                 dprintk("%s: start filtering\n", __FUNCTION__);
 930                 priv->secfeed->start_filtering(priv->secfeed);
 931         } else if (priv->feedtype == DVB_NET_FEEDTYPE_ULE) {
 932                 struct timespec timeout = { 0, 30000000 }; // 30 msec
 933
 934                 /* we have payloads encapsulated in TS */
 935                 dprintk("%s: alloc tsfeed\n", __FUNCTION__);
 936                 ret = demux->allocate_ts_feed(demux, &priv->tsfeed, dvb_net_ts_callback);
 937                 if (ret < 0) {
 938                         printk("%s: could not allocate ts feed\n", dev->name);
 939                         return ret;
 940                 }
 941
 942                 /* Set netdevice pointer for ts decaps callback. */
 943                 priv->tsfeed->priv = (void *)dev;
 944                 ret = priv->tsfeed->set(priv->tsfeed, priv->pid,
 945                                         TS_PACKET, DMX_TS_PES_OTHER,
 946                                         188 * 100, /* nr. of bytes delivered per callback */
 947                                         32768,     /* circular buffer size */
 948                                         0,         /* descramble */
 949                                         timeout);
 950
 951                 if (ret < 0) {
 952                         printk("%s: could not set ts feed\n", dev->name);
 953                         priv->demux->release_ts_feed(priv->demux, priv->tsfeed);
 954                         priv->tsfeed = NULL;
 955                         return ret;
 956                 }
 957
 958                 dprintk("%s: start filtering\n", __FUNCTION__);
 959                 priv->tsfeed->start_filtering(priv->tsfeed);
 960         } else
 961                 return -EINVAL;
 962
 963         return 0;
 964 }
 965
 966 static int dvb_net_feed_stop(struct net_device *dev)
 967 {
 968         struct dvb_net_priv *priv = dev->priv;
 969         int i;
 970
 971         dprintk("%s\n", __FUNCTION__);
 972         if (priv->feedtype == DVB_NET_FEEDTYPE_MPE) {
 973                 if (priv->secfeed) {
 974                         if (priv->secfeed->is_filtering) {
 975                                 dprintk("%s: stop secfeed\n", __FUNCTION__);
 976                                 priv->secfeed->stop_filtering(priv->secfeed);
 977                         }
 978
 979                         if (priv->secfilter) {
 980                                 dprintk("%s: release secfilter\n", __FUNCTION__);
 981                                 priv->secfeed->release_filter(priv->secfeed,
 982                                                               priv->secfilter);
 983                                 priv->secfilter=NULL;
 984                         }
 985
 986                         for (i=0; i<priv->multi_num; i++) {
 987                                 if (priv->multi_secfilter[i]) {
 988                                         dprintk("%s: release multi_filter[%d]\n",
 989                                                 __FUNCTION__, i);
 990                                         priv->secfeed->release_filter(priv->secfeed,
 991                                                                       priv->multi_secfilter[i]);
 992                                         priv->multi_secfilter[i] = NULL;
 993                                 }
 994                         }
 995
 996                         priv->demux->release_section_feed(priv->demux, priv->secfeed);
 997                         priv->secfeed = NULL;
 998                 } else
 999                         printk("%s: no feed to stop\n", dev->name);
1000         } else if (priv->feedtype == DVB_NET_FEEDTYPE_ULE) {
1001                 if (priv->tsfeed) {
1002                         if (priv->tsfeed->is_filtering) {
1003                                 dprintk("%s: stop tsfeed\n", __FUNCTION__);
1004                                 priv->tsfeed->stop_filtering(priv->tsfeed);
1005                         }
1006                         priv->demux->release_ts_feed(priv->demux, priv->tsfeed);
1007                         priv->tsfeed = NULL;
1008                 }
1009                 else
1010                         printk("%s: no ts feed to stop\n", dev->name);
1011         } else
1012                 return -EINVAL;
1013         return 0;
1014 }
1015
1016
1017 static int dvb_set_mc_filter (struct net_device *dev, struct dev_mc_list *mc)
1018 {
1019         struct dvb_net_priv *priv = dev->priv;
1020
1021         if (priv->multi_num == DVB_NET_MULTICAST_MAX)
1022                 return -ENOMEM;
1023
1024         memcpy(priv->multi_macs[priv->multi_num], mc->dmi_addr, 6);
1025
1026         priv->multi_num++;
1027         return 0;
1028 }
1029
1030
1031 static void wq_set_multicast_list (void *data)
1032 {
1033         struct net_device *dev = data;
1034         struct dvb_net_priv *priv = dev->priv;
1035
1036         dvb_net_feed_stop(dev);
1037
1038         priv->rx_mode = RX_MODE_UNI;
1039
1040         if (dev->flags & IFF_PROMISC) {
1041                 dprintk("%s: promiscuous mode\n", dev->name);
1042                 priv->rx_mode = RX_MODE_PROMISC;
1043         } else if ((dev->flags & IFF_ALLMULTI)) {
1044                 dprintk("%s: allmulti mode\n", dev->name);
1045                 priv->rx_mode = RX_MODE_ALL_MULTI;
1046         } else if (dev->mc_count) {
1047                 int mci;
1048                 struct dev_mc_list *mc;
1049
1050                 dprintk("%s: set_mc_list, %d entries\n",
1051                         dev->name, dev->mc_count);
1052
1053                 priv->rx_mode = RX_MODE_MULTI;
1054                 priv->multi_num = 0;
1055
1056                 for (mci = 0, mc=dev->mc_list;
1057                      mci < dev->mc_count;
1058                      mc = mc->next, mci++) {
1059                         dvb_set_mc_filter(dev, mc);
1060                 }
1061         }
1062
1063         dvb_net_feed_start(dev);
1064 }
1065
1066
1067 static void dvb_net_set_multicast_list (struct net_device *dev)
1068 {
1069         struct dvb_net_priv *priv = dev->priv;
1070         schedule_work(&priv->set_multicast_list_wq);
1071 }
1072
1073
1074 static void wq_restart_net_feed (void *data)
1075 {
1076         struct net_device *dev = data;
1077
1078         if (netif_running(dev)) {
1079                 dvb_net_feed_stop(dev);
1080                 dvb_net_feed_start(dev);
1081         }
1082 }
1083
1084
1085 static int dvb_net_set_mac (struct net_device *dev, void *p)
1086 {
1087         struct dvb_net_priv *priv = dev->priv;
1088         struct sockaddr *addr=p;
1089
1090         memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1091
1092         if (netif_running(dev))
1093                 schedule_work(&priv->restart_net_feed_wq);
1094
1095         return 0;
1096 }
1097
1098
1099 static int dvb_net_open(struct net_device *dev)
1100 {
1101         struct dvb_net_priv *priv = dev->priv;
1102
1103         priv->in_use++;
1104         dvb_net_feed_start(dev);
1105         return 0;
1106 }
1107
1108
1109 static int dvb_net_stop(struct net_device *dev)
1110 {
1111         struct dvb_net_priv *priv = dev->priv;
1112
1113         priv->in_use--;
1114         return dvb_net_feed_stop(dev);
1115 }
1116
1117 static struct net_device_stats * dvb_net_get_stats(struct net_device *dev)
1118 {
1119         return &((struct dvb_net_priv*) dev->priv)->stats;
1120 }
1121
1122 static void dvb_net_setup(struct net_device *dev)
1123 {
1124         ether_setup(dev);
1125
1126         dev->open               = dvb_net_open;
1127         dev->stop               = dvb_net_stop;
1128         dev->hard_start_xmit    = dvb_net_tx;
1129         dev->get_stats          = dvb_net_get_stats;
1130         dev->set_multicast_list = dvb_net_set_multicast_list;
1131         dev->set_mac_address    = dvb_net_set_mac;
1132         dev->mtu                = 4096;
1133         dev->mc_count           = 0;
1134         dev->hard_header_cache  = NULL;
1135         dev->flags |= IFF_NOARP;
1136 }
1137
1138 static int get_if(struct dvb_net *dvbnet)
1139 {
1140         int i;
1141
1142         for (i=0; i<DVB_NET_DEVICES_MAX; i++)
1143                 if (!dvbnet->state[i])
1144                         break;
1145
1146         if (i == DVB_NET_DEVICES_MAX)
1147                 return -1;
1148
1149         dvbnet->state[i]=1;
1150         return i;
1151 }
1152
1153 static int dvb_net_add_if(struct dvb_net *dvbnet, u16 pid, u8 feedtype)
1154 {
1155         struct net_device *net;
1156         struct dvb_net_priv *priv;
1157         int result;
1158         int if_num;
1159
1160         if (feedtype != DVB_NET_FEEDTYPE_MPE && feedtype != DVB_NET_FEEDTYPE_ULE)
1161                 return -EINVAL;
1162         if ((if_num = get_if(dvbnet)) < 0)
1163                 return -EINVAL;
1164
1165         net = alloc_netdev(sizeof(struct dvb_net_priv), "dvb", dvb_net_setup);
1166         if (!net)
1167                 return -ENOMEM;
1168
1169         if (dvbnet->dvbdev->id)
1170                 snprintf(net->name, IFNAMSIZ, "dvb%d%u%d",
1171                          dvbnet->dvbdev->adapter->num, dvbnet->dvbdev->id, if_num);
1172         else
1173                 /* compatibility fix to keep dvb0_0 format */
1174                 snprintf(net->name, IFNAMSIZ, "dvb%d_%d",
1175                          dvbnet->dvbdev->adapter->num, if_num);
1176
1177         net->addr_len = 6;
1178         memcpy(net->dev_addr, dvbnet->dvbdev->adapter->proposed_mac, 6);
1179
1180         dvbnet->device[if_num] = net;
1181
1182         priv = net->priv;
1183         priv->demux = dvbnet->demux;
1184         priv->pid = pid;
1185         priv->rx_mode = RX_MODE_UNI;
1186         priv->need_pusi = 1;
1187         priv->tscc = 0;
1188         priv->feedtype = feedtype;
1189         reset_ule(priv);
1190
1191         INIT_WORK(&priv->set_multicast_list_wq, wq_set_multicast_list, net);
1192         INIT_WORK(&priv->restart_net_feed_wq, wq_restart_net_feed, net);
1193
1194         net->base_addr = pid;
1195
1196         if ((result = register_netdev(net)) < 0) {
1197                 dvbnet->device[if_num] = NULL;
1198                 free_netdev(net);
1199                 return result;
1200         }
1201         printk("dvb_net: created network interface %s\n", net->name);
1202
1203         return if_num;
1204 }
1205
1206 static int dvb_net_remove_if(struct dvb_net *dvbnet, unsigned int num)
1207 {
1208         struct net_device *net = dvbnet->device[num];
1209         struct dvb_net_priv *priv;
1210
1211         if (!dvbnet->state[num])
1212                 return -EINVAL;
1213         priv = net->priv;
1214         if (priv->in_use)
1215                 return -EBUSY;
1216
1217         dvb_net_stop(net);
1218         flush_scheduled_work();
1219         printk("dvb_net: removed network interface %s\n", net->name);
1220         unregister_netdev(net);
1221         dvbnet->state[num]=0;
1222         dvbnet->device[num] = NULL;
1223         free_netdev(net);
1224
1225         return 0;
1226 }
1227
1228 static int dvb_net_do_ioctl(struct inode *inode, struct file *file,
1229                   unsigned int cmd, void *parg)
1230 {
1231         struct dvb_device *dvbdev = file->private_data;
1232         struct dvb_net *dvbnet = dvbdev->priv;
1233
1234         if (((file->f_flags&O_ACCMODE)==O_RDONLY))
1235                 return -EPERM;
1236
1237         switch (cmd) {
1238         case NET_ADD_IF:
1239         {
1240                 struct dvb_net_if *dvbnetif = parg;
1241                 int result;
1242
1243                 if (!capable(CAP_SYS_ADMIN))
1244                         return -EPERM;
1245
1246                 if (!try_module_get(dvbdev->adapter->module))
1247                         return -EPERM;
1248
1249                 result=dvb_net_add_if(dvbnet, dvbnetif->pid, dvbnetif->feedtype);
1250                 if (result<0) {
1251                         module_put(dvbdev->adapter->module);
1252                         return result;
1253                 }
1254                 dvbnetif->if_num=result;
1255                 break;
1256         }
1257         case NET_GET_IF:
1258         {
1259                 struct net_device *netdev;
1260                 struct dvb_net_priv *priv_data;
1261                 struct dvb_net_if *dvbnetif = parg;
1262
1263                 if (dvbnetif->if_num >= DVB_NET_DEVICES_MAX ||
1264                     !dvbnet->state[dvbnetif->if_num])
1265                         return -EINVAL;
1266
1267                 netdev = dvbnet->device[dvbnetif->if_num];
1268
1269                 priv_data = netdev->priv;
1270                 dvbnetif->pid=priv_data->pid;
1271                 dvbnetif->feedtype=priv_data->feedtype;
1272                 break;
1273         }
1274         case NET_REMOVE_IF:
1275         {
1276                 int ret;
1277
1278                 if (!capable(CAP_SYS_ADMIN))
1279                         return -EPERM;
1280                 if ((unsigned int) parg >= DVB_NET_DEVICES_MAX)
1281                         return -EINVAL;
1282                 ret = dvb_net_remove_if(dvbnet, (unsigned int) parg);
1283                 if (!ret)
1284                         module_put(dvbdev->adapter->module);
1285                 return ret;
1286         }
1287
1288         /* binary compatiblity cruft */
1289         case __NET_ADD_IF_OLD:
1290         {
1291                 struct __dvb_net_if_old *dvbnetif = parg;
1292                 int result;
1293
1294                 if (!capable(CAP_SYS_ADMIN))
1295                         return -EPERM;
1296
1297                 if (!try_module_get(dvbdev->adapter->module))
1298                         return -EPERM;
1299
1300                 result=dvb_net_add_if(dvbnet, dvbnetif->pid, DVB_NET_FEEDTYPE_MPE);
1301                 if (result<0) {
1302                         module_put(dvbdev->adapter->module);
1303                         return result;
1304                 }
1305                 dvbnetif->if_num=result;
1306                 break;
1307         }
1308         case __NET_GET_IF_OLD:
1309         {
1310                 struct net_device *netdev;
1311                 struct dvb_net_priv *priv_data;
1312                 struct __dvb_net_if_old *dvbnetif = parg;
1313
1314                 if (dvbnetif->if_num >= DVB_NET_DEVICES_MAX ||
1315                     !dvbnet->state[dvbnetif->if_num])
1316                         return -EINVAL;
1317
1318                 netdev = dvbnet->device[dvbnetif->if_num];
1319
1320                 priv_data = netdev->priv;
1321                 dvbnetif->pid=priv_data->pid;
1322                 break;
1323         }
1324         default:
1325                 return -ENOTTY;
1326         }
1327         return 0;
1328 }
1329
1330 static int dvb_net_ioctl(struct inode *inode, struct file *file,
1331               unsigned int cmd, unsigned long arg)
1332 {
1333         return dvb_usercopy(inode, file, cmd, arg, dvb_net_do_ioctl);
1334 }
1335
1336 static struct file_operations dvb_net_fops = {
1337         .owner = THIS_MODULE,
1338         .ioctl = dvb_net_ioctl,
1339         .open = dvb_generic_open,
1340         .release = dvb_generic_release,
1341 };
1342
1343 static struct dvb_device dvbdev_net = {
1344         .priv = NULL,
1345         .users = 1,
1346         .writers = 1,
1347         .fops = &dvb_net_fops,
1348 };
1349
1350
1351 void dvb_net_release (struct dvb_net *dvbnet)
1352 {
1353         int i;
1354
1355         dvb_unregister_device(dvbnet->dvbdev);
1356
1357         for (i=0; i<DVB_NET_DEVICES_MAX; i++) {
1358                 if (!dvbnet->state[i])
1359                         continue;
1360                 dvb_net_remove_if(dvbnet, i);
1361         }
1362 }
1363 EXPORT_SYMBOL(dvb_net_release);
1364
1365
1366 int dvb_net_init (struct dvb_adapter *adap, struct dvb_net *dvbnet,
1367                   struct dmx_demux *dmx)
1368 {
1369         int i;
1370
1371         dvbnet->demux = dmx;
1372
1373         for (i=0; i<DVB_NET_DEVICES_MAX; i++)
1374                 dvbnet->state[i] = 0;
1375
1376         dvb_register_device (adap, &dvbnet->dvbdev, &dvbdev_net,
1377                              dvbnet, DVB_DEVICE_NET);
1378
1379         return 0;
1380 }
1381 EXPORT_SYMBOL(dvb_net_init);