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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
  66 #include "dvb_demux.h"
  67 #include "dvb_net.h"
  68
  69 static int dvb_net_debug;
  70 module_param(dvb_net_debug, int, 0444);
  71 MODULE_PARM_DESC(dvb_net_debug, "enable debug messages");
  72
  73 #define dprintk(x...) do { if (dvb_net_debug) printk(x); } while (0)
  74
  75
  76 static inline __u32 iov_crc32( __u32 c, struct kvec *iov, unsigned int cnt )
  77 {
  78         unsigned int j;
  79         for (j = 0; j < cnt; j++)
  80                 c = crc32_be( c, iov[j].iov_base, iov[j].iov_len );
  81         return c;
  82 }
  83
  84
  85 #define DVB_NET_MULTICAST_MAX 10
  86
  87 #undef ULE_DEBUG
  88
  89 #ifdef ULE_DEBUG
  90
  91 #define isprint(c)      ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || (c >= '0' && c <= '9'))
  92
  93 static void hexdump( const unsigned char *buf, unsigned short len )
  94 {
  95         char str[80], octet[10];
  96         int ofs, i, l;
  97
  98         for (ofs = 0; ofs < len; ofs += 16) {
  99                 sprintf( str, "%03d: ", ofs );
 100
 101                 for (i = 0; i < 16; i++) {
 102                         if ((i + ofs) < len)
 103                                 sprintf( octet, "%02x ", buf[ofs + i] );
 104                         else
 105                                 strcpy( octet, "   " );
 106
 107                         strcat( str, octet );
 108                 }
 109                 strcat( str, "  " );
 110                 l = strlen( str );
 111
 112                 for (i = 0; (i < 16) && ((i + ofs) < len); i++)
 113                         str[l++] = isprint( buf[ofs + i] ) ? buf[ofs + i] : '.';
 114
 115                 str[l] = '\0';
 116                 printk( KERN_WARNING "%s\n", str );
 117         }
 118 }
 119
 120 #endif
 121
 122 struct dvb_net_priv {
 123         int in_use;
 124         struct net_device_stats stats;
 125         u16 pid;
 126         struct dvb_net *host;
 127         struct dmx_demux *demux;
 128         struct dmx_section_feed *secfeed;
 129         struct dmx_section_filter *secfilter;
 130         struct dmx_ts_feed *tsfeed;
 131         int multi_num;
 132         struct dmx_section_filter *multi_secfilter[DVB_NET_MULTICAST_MAX];
 133         unsigned char multi_macs[DVB_NET_MULTICAST_MAX][6];
 134         int rx_mode;
 135 #define RX_MODE_UNI 0
 136 #define RX_MODE_MULTI 1
 137 #define RX_MODE_ALL_MULTI 2
 138 #define RX_MODE_PROMISC 3
 139         struct work_struct set_multicast_list_wq;
 140         struct work_struct restart_net_feed_wq;
 141         unsigned char feedtype;                 /* Either FEED_TYPE_ or FEED_TYPE_ULE */
 142         int need_pusi;                          /* Set to 1, if synchronization on PUSI required. */
 143         unsigned char tscc;                     /* TS continuity counter after sync on PUSI. */
 144         struct sk_buff *ule_skb;                /* ULE SNDU decodes into this buffer. */
 145         unsigned char *ule_next_hdr;            /* Pointer into skb to next ULE extension header. */
 146         unsigned short ule_sndu_len;            /* ULE SNDU length in bytes, w/o D-Bit. */
 147         unsigned short ule_sndu_type;           /* ULE SNDU type field, complete. */
 148         unsigned char ule_sndu_type_1;          /* ULE SNDU type field, if split across 2 TS cells. */
 149         unsigned char ule_dbit;                 /* Whether the DestMAC address present
 150                                                  * or not (bit is set). */
 151         unsigned char ule_bridged;              /* Whether the ULE_BRIDGED extension header was found. */
 152         int ule_sndu_remain;                    /* Nr. of bytes still required for current ULE SNDU. */
 153         unsigned long ts_count;                 /* Current ts cell counter. */
 154 };
 155
 156
 157 /**
 158  *      Determine the packet's protocol ID. The rule here is that we
 159  *      assume 802.3 if the type field is short enough to be a length.
 160  *      This is normal practice and works for any 'now in use' protocol.
 161  *
 162  *  stolen from eth.c out of the linux kernel, hacked for dvb-device
 163  *  by Michael Holzt <kju@debian.org>
 164  */
 165 static unsigned short dvb_net_eth_type_trans(struct sk_buff *skb,
 166                                       struct net_device *dev)
 167 {
 168         struct ethhdr *eth;
 169         unsigned char *rawp;
 170
 171         skb->mac.raw=skb->data;
 172         skb_pull(skb,dev->hard_header_len);
 173         eth = eth_hdr(skb);
 174
 175         if (*eth->h_dest & 1) {
 176                 if(memcmp(eth->h_dest,dev->broadcast, ETH_ALEN)==0)
 177                         skb->pkt_type=PACKET_BROADCAST;
 178                 else
 179                         skb->pkt_type=PACKET_MULTICAST;
 180         }
 181
 182         if (ntohs(eth->h_proto) >= 1536)
 183                 return eth->h_proto;
 184
 185         rawp = skb->data;
 186
 187         /**
 188          *      This is a magic hack to spot IPX packets. Older Novell breaks
 189          *      the protocol design and runs IPX over 802.3 without an 802.2 LLC
 190          *      layer. We look for FFFF which isn't a used 802.2 SSAP/DSAP. This
 191          *      won't work for fault tolerant netware but does for the rest.
 192          */
 193         if (*(unsigned short *)rawp == 0xFFFF)
 194                 return htons(ETH_P_802_3);
 195
 196         /**
 197          *      Real 802.2 LLC
 198          */
 199         return htons(ETH_P_802_2);
 200 }
 201
 202 #define TS_SZ   188
 203 #define TS_SYNC 0x47
 204 #define TS_TEI  0x80
 205 #define TS_SC   0xC0
 206 #define TS_PUSI 0x40
 207 #define TS_AF_A 0x20
 208 #define TS_AF_D 0x10
 209
 210 /* ULE Extension Header handlers. */
 211
 212 #define ULE_TEST        0
 213 #define ULE_BRIDGED     1
 214
 215 static int ule_test_sndu( struct dvb_net_priv *p )
 216 {
 217         return -1;
 218 }
 219
 220 static int ule_bridged_sndu( struct dvb_net_priv *p )
 221 {
 222         /* BRIDGE SNDU handling sucks in draft-ietf-ipdvb-ule-03.txt.
 223          * This has to be the last extension header, otherwise it won't work.
 224          * Blame the authors!
 225          */
 226         p->ule_bridged = 1;
 227         return 0;
 228 }
 229
 230
 231 /** Handle ULE extension headers.
 232  *  Function is called after a successful CRC32 verification of an ULE SNDU to complete its decoding.
 233  *  Returns: >= 0: nr. of bytes consumed by next extension header
 234  *           -1:   Mandatory extension header that is not recognized or TEST SNDU; discard.
 235  */
 236 static int handle_one_ule_extension( struct dvb_net_priv *p )
 237 {
 238         /* Table of mandatory extension header handlers.  The header type is the index. */
 239         static int (*ule_mandatory_ext_handlers[255])( struct dvb_net_priv *p ) =
 240                 { [0] = ule_test_sndu, [1] = ule_bridged_sndu, [2] = NULL,  };
 241
 242         /* Table of optional extension header handlers.  The header type is the index. */
 243         static int (*ule_optional_ext_handlers[255])( struct dvb_net_priv *p ) = { NULL, };
 244
 245         int ext_len = 0;
 246         unsigned char hlen = (p->ule_sndu_type & 0x0700) >> 8;
 247         unsigned char htype = p->ule_sndu_type & 0x00FF;
 248
 249         /* Discriminate mandatory and optional extension headers. */
 250         if (hlen == 0) {
 251                 /* Mandatory extension header */
 252                 if (ule_mandatory_ext_handlers[htype]) {
 253                         ext_len = ule_mandatory_ext_handlers[htype]( p );
 254                         p->ule_next_hdr += ext_len;
 255                         if (! p->ule_bridged) {
 256                                 p->ule_sndu_type = ntohs( *(unsigned short *)p->ule_next_hdr );
 257                                 p->ule_next_hdr += 2;
 258                         } else {
 259                                 p->ule_sndu_type = ntohs( *(unsigned short *)(p->ule_next_hdr + ((p->ule_dbit ? 2 : 3) * ETH_ALEN)) );
 260                                 /* This assures the extension handling loop will terminate. */
 261                         }
 262                 } else
 263                         ext_len = -1;   /* SNDU has to be discarded. */
 264         } else {
 265                 /* Optional extension header.  Calculate the length. */
 266                 ext_len = hlen << 2;
 267                 /* Process the optional extension header according to its type. */
 268                 if (ule_optional_ext_handlers[htype])
 269                         (void)ule_optional_ext_handlers[htype]( p );
 270                 p->ule_next_hdr += ext_len;
 271                 p->ule_sndu_type = ntohs( *(unsigned short *)p->ule_next_hdr );
 272                 p->ule_next_hdr += 2;
 273         }
 274
 275         return ext_len;
 276 }
 277
 278 static int handle_ule_extensions( struct dvb_net_priv *p )
 279 {
 280         int total_ext_len = 0, l;
 281
 282         p->ule_next_hdr = p->ule_skb->data;
 283         do {
 284                 l = handle_one_ule_extension( p );
 285                 if (l == -1) return -1; /* Stop extension header processing and discard SNDU. */
 286                 total_ext_len += l;
 287
 288         } while (p->ule_sndu_type < 1536);
 289
 290         return total_ext_len;
 291 }
 292
 293
 294 /** Prepare for a new ULE SNDU: reset the decoder state. */
 295 static inline void reset_ule( struct dvb_net_priv *p )
 296 {
 297         p->ule_skb = NULL;
 298         p->ule_next_hdr = NULL;
 299         p->ule_sndu_len = 0;
 300         p->ule_sndu_type = 0;
 301         p->ule_sndu_type_1 = 0;
 302         p->ule_sndu_remain = 0;
 303         p->ule_dbit = 0xFF;
 304         p->ule_bridged = 0;
 305 }
 306
 307 /**
 308  * Decode ULE SNDUs according to draft-ietf-ipdvb-ule-03.txt from a sequence of
 309  * TS cells of a single PID.
 310  */
 311 static void dvb_net_ule( struct net_device *dev, const u8 *buf, size_t buf_len )
 312 {
 313         struct dvb_net_priv *priv = dev->priv;
 314         unsigned long skipped = 0L;
 315         u8 *ts, *ts_end, *from_where = NULL, ts_remain = 0, how_much = 0, new_ts = 1;
 316         struct ethhdr *ethh = NULL;
 317
 318 #ifdef ULE_DEBUG
 319         /* The code inside ULE_DEBUG keeps a history of the last 100 TS cells processed. */
 320         static unsigned char ule_hist[100*TS_SZ];
 321         static unsigned char *ule_where = ule_hist, ule_dump = 0;
 322 #endif
 323
 324         if (dev == NULL) {
 325                 printk( KERN_ERR "NO netdev struct!\n" );
 326                 return;
 327         }
 328
 329         /* For all TS cells in current buffer.
 330          * Appearently, we are called for every single TS cell.
 331          */
 332         for (ts = (char *)buf, ts_end = (char *)buf + buf_len; ts < ts_end; /* no default incr. */ ) {
 333
 334                 if (new_ts) {
 335                         /* We are about to process a new TS cell. */
 336
 337 #ifdef ULE_DEBUG
 338                         if (ule_where >= &ule_hist[100*TS_SZ]) ule_where = ule_hist;
 339                         memcpy( ule_where, ts, TS_SZ );
 340                         if (ule_dump) {
 341                                 hexdump( ule_where, TS_SZ );
 342                                 ule_dump = 0;
 343                         }
 344                         ule_where += TS_SZ;
 345 #endif
 346
 347                         /* Check TS error conditions: sync_byte, transport_error_indicator, scrambling_control . */
 348                         if ((ts[0] != TS_SYNC) || (ts[1] & TS_TEI) || ((ts[3] & TS_SC) != 0)) {
 349                                 printk(KERN_WARNING "%lu: Invalid TS cell: SYNC %#x, TEI %u, SC %#x.\n",
 350                                        priv->ts_count, ts[0], ts[1] & TS_TEI >> 7, ts[3] & 0xC0 >> 6);
 351
 352                                 /* Drop partly decoded SNDU, reset state, resync on PUSI. */
 353                                 if (priv->ule_skb) {
 354                                         dev_kfree_skb( priv->ule_skb );
 355                                         /* Prepare for next SNDU. */
 356                                         ((struct dvb_net_priv *) dev->priv)->stats.rx_errors++;
 357                                         ((struct dvb_net_priv *) dev->priv)->stats.rx_frame_errors++;
 358                                 }
 359                                 reset_ule(priv);
 360                                 priv->need_pusi = 1;
 361
 362                                 /* Continue with next TS cell. */
 363                                 ts += TS_SZ;
 364                                 priv->ts_count++;
 365                                 continue;
 366                         }
 367
 368                         ts_remain = 184;
 369                         from_where = ts + 4;
 370                 }
 371                 /* Synchronize on PUSI, if required. */
 372                 if (priv->need_pusi) {
 373                         if (ts[1] & TS_PUSI) {
 374                                 /* Find beginning of first ULE SNDU in current TS cell. */
 375                                 /* Synchronize continuity counter. */
 376                                 priv->tscc = ts[3] & 0x0F;
 377                                 /* There is a pointer field here. */
 378                                 if (ts[4] > ts_remain) {
 379                                         printk(KERN_ERR "%lu: Invalid ULE packet "
 380                                                "(pointer field %d)\n", priv->ts_count, ts[4]);
 381                                         ts += TS_SZ;
 382                                         priv->ts_count++;
 383                                         continue;
 384                                 }
 385                                 /* Skip to destination of pointer field. */
 386                                 from_where = &ts[5] + ts[4];
 387                                 ts_remain -= 1 + ts[4];
 388                                 skipped = 0;
 389                         } else {
 390                                 skipped++;
 391                                 ts += TS_SZ;
 392                                 priv->ts_count++;
 393                                 continue;
 394                         }
 395                 }
 396
 397                 /* Check continuity counter. */
 398                 if (new_ts) {
 399                         if ((ts[3] & 0x0F) == priv->tscc)
 400                                 priv->tscc = (priv->tscc + 1) & 0x0F;
 401                         else {
 402                                 /* TS discontinuity handling: */
 403                                 printk(KERN_WARNING "%lu: TS discontinuity: got %#x, "
 404                                        "exptected %#x.\n", priv->ts_count, ts[3] & 0x0F, priv->tscc);
 405                                 /* Drop partly decoded SNDU, reset state, resync on PUSI. */
 406                                 if (priv->ule_skb) {
 407                                         dev_kfree_skb( priv->ule_skb );
 408                                         /* Prepare for next SNDU. */
 409                                         // reset_ule(priv);  moved to below.
 410                                         ((struct dvb_net_priv *) dev->priv)->stats.rx_errors++;
 411                                         ((struct dvb_net_priv *) dev->priv)->stats.rx_frame_errors++;
 412                                 }
 413                                 reset_ule(priv);
 414                                 /* skip to next PUSI. */
 415                                 priv->need_pusi = 1;
 416                                 ts += TS_SZ;
 417                                 priv->ts_count++;
 418                                 continue;
 419                         }
 420                         /* If we still have an incomplete payload, but PUSI is
 421                          * set; some TS cells are missing.
 422                          * This is only possible here, if we missed exactly 16 TS
 423                          * cells (continuity counter wrap). */
 424                         if (ts[1] & TS_PUSI) {
 425                                 if (! priv->need_pusi) {
 426                                         if (*from_where > 181) {
 427                                                 /* Pointer field is invalid.  Drop this TS cell and any started ULE SNDU. */
 428                                                 printk(KERN_WARNING "%lu: Invalid pointer "
 429                                                        "field: %u.\n", priv->ts_count, *from_where);
 430
 431                                                 /* Drop partly decoded SNDU, reset state, resync on PUSI. */
 432                                                 if (priv->ule_skb) {
 433                                                         dev_kfree_skb( priv->ule_skb );
 434                                                         ((struct dvb_net_priv *) dev->priv)->stats.rx_errors++;
 435                                                         ((struct dvb_net_priv *) dev->priv)->stats.rx_frame_errors++;
 436                                                 }
 437                                                 reset_ule(priv);
 438                                                 priv->need_pusi = 1;
 439                                                 ts += TS_SZ;
 440                                                 priv->ts_count++;
 441                                                 continue;
 442                                         }
 443                                         /* Skip pointer field (we're processing a
 444                                          * packed payload). */
 445                                         from_where += 1;
 446                                         ts_remain -= 1;
 447                                 } else
 448                                         priv->need_pusi = 0;
 449
 450                                 if (priv->ule_sndu_remain > 183) {
 451                                         /* Current SNDU lacks more data than there could be available in the
 452                                          * current TS cell. */
 453                                         ((struct dvb_net_priv *) dev->priv)->stats.rx_errors++;
 454                                         ((struct dvb_net_priv *) dev->priv)->stats.rx_length_errors++;
 455                                         printk(KERN_WARNING "%lu: Expected %d more SNDU bytes, but "
 456                                                "got PUSI (pf %d, ts_remain %d).  Flushing incomplete payload.\n",
 457                                                priv->ts_count, priv->ule_sndu_remain, ts[4], ts_remain);
 458                                         dev_kfree_skb(priv->ule_skb);
 459                                         /* Prepare for next SNDU. */
 460                                         reset_ule(priv);
 461                                         /* Resync: go to where pointer field points to: start of next ULE SNDU. */
 462                                         from_where += ts[4];
 463                                         ts_remain -= ts[4];
 464                                 }
 465                         }
 466                 }
 467
 468                 /* Check if new payload needs to be started. */
 469                 if (priv->ule_skb == NULL) {
 470                         /* Start a new payload with skb.
 471                          * Find ULE header.  It is only guaranteed that the
 472                          * length field (2 bytes) is contained in the current
 473                          * TS.
 474                          * Check ts_remain has to be >= 2 here. */
 475                         if (ts_remain < 2) {
 476                                 printk(KERN_WARNING "Invalid payload packing: only %d "
 477                                        "bytes left in TS.  Resyncing.\n", ts_remain);
 478                                 priv->ule_sndu_len = 0;
 479                                 priv->need_pusi = 1;
 480                                 continue;
 481                         }
 482
 483                         if (! priv->ule_sndu_len) {
 484                                 /* Got at least two bytes, thus extrace the SNDU length. */
 485                                 priv->ule_sndu_len = from_where[0] << 8 | from_where[1];
 486                                 if (priv->ule_sndu_len & 0x8000) {
 487                                         /* D-Bit is set: no dest mac present. */
 488                                         priv->ule_sndu_len &= 0x7FFF;
 489                                         priv->ule_dbit = 1;
 490                                 } else
 491                                         priv->ule_dbit = 0;
 492
 493                                 if (priv->ule_sndu_len > 32763) {
 494                                         printk(KERN_WARNING "%lu: Invalid ULE SNDU length %u. "
 495                                                "Resyncing.\n", priv->ts_count, priv->ule_sndu_len);
 496                                         priv->ule_sndu_len = 0;
 497                                         priv->need_pusi = 1;
 498                                         new_ts = 1;
 499                                         ts += TS_SZ;
 500                                         priv->ts_count++;
 501                                         continue;
 502                                 }
 503                                 ts_remain -= 2; /* consume the 2 bytes SNDU length. */
 504                                 from_where += 2;
 505                         }
 506
 507                         /*
 508                          * State of current TS:
 509                          *   ts_remain (remaining bytes in the current TS cell)
 510                          *   0  ule_type is not available now, we need the next TS cell
 511                          *   1  the first byte of the ule_type is present
 512                          * >=2  full ULE header present, maybe some payload data as well.
 513                          */
 514                         switch (ts_remain) {
 515                                 case 1:
 516                                         priv->ule_sndu_type = from_where[0] << 8;
 517                                         priv->ule_sndu_type_1 = 1; /* first byte of ule_type is set. */
 518                                         ts_remain -= 1; from_where += 1;
 519                                         /* Continue w/ next TS. */
 520                                 case 0:
 521                                         new_ts = 1;
 522                                         ts += TS_SZ;
 523                                         priv->ts_count++;
 524                                         continue;
 525
 526                                 default: /* complete ULE header is present in current TS. */
 527                                         /* Extract ULE type field. */
 528                                         if (priv->ule_sndu_type_1) {
 529                                                 priv->ule_sndu_type |= from_where[0];
 530                                                 from_where += 1; /* points to payload start. */
 531                                                 ts_remain -= 1;
 532                                         } else {
 533                                                 /* Complete type is present in new TS. */
 534                                                 priv->ule_sndu_type = from_where[0] << 8 | from_where[1];
 535                                                 from_where += 2; /* points to payload start. */
 536                                                 ts_remain -= 2;
 537                                         }
 538                                         break;
 539                         }
 540
 541                         /* Allocate the skb (decoder target buffer) with the correct size, as follows:
 542                          * prepare for the largest case: bridged SNDU with MAC address (dbit = 0). */
 543                         priv->ule_skb = dev_alloc_skb( priv->ule_sndu_len + ETH_HLEN + ETH_ALEN );
 544                         if (priv->ule_skb == NULL) {
 545                                 printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n",
 546                                        dev->name);
 547                                 ((struct dvb_net_priv *)dev->priv)->stats.rx_dropped++;
 548                                 return;
 549                         }
 550
 551                         /* This includes the CRC32 _and_ dest mac, if !dbit. */
 552                         priv->ule_sndu_remain = priv->ule_sndu_len;
 553                         priv->ule_skb->dev = dev;
 554                         /* Leave space for Ethernet or bridged SNDU header (eth hdr plus one MAC addr). */
 555                         skb_reserve( priv->ule_skb, ETH_HLEN + ETH_ALEN );
 556                 }
 557
 558                 /* Copy data into our current skb. */
 559                 how_much = min(priv->ule_sndu_remain, (int)ts_remain);
 560                 memcpy(skb_put(priv->ule_skb, how_much), from_where, how_much);
 561                 priv->ule_sndu_remain -= how_much;
 562                 ts_remain -= how_much;
 563                 from_where += how_much;
 564
 565                 /* Check for complete payload. */
 566                 if (priv->ule_sndu_remain <= 0) {
 567                         /* Check CRC32, we've got it in our skb already. */
 568                         unsigned short ulen = htons(priv->ule_sndu_len);
 569                         unsigned short utype = htons(priv->ule_sndu_type);
 570                         struct kvec iov[3] = {
 571                                 { &ulen, sizeof ulen },
 572                                 { &utype, sizeof utype },
 573                                 { priv->ule_skb->data, priv->ule_skb->len - 4 }
 574                         };
 575                         unsigned long ule_crc = ~0L, expected_crc;
 576                         if (priv->ule_dbit) {
 577                                 /* Set D-bit for CRC32 verification,
 578                                  * if it was set originally. */
 579                                 ulen |= 0x0080;
 580                         }
 581
 582                         ule_crc = iov_crc32(ule_crc, iov, 3);
 583                         expected_crc = *((u8 *)priv->ule_skb->tail - 4) << 24 |
 584                                        *((u8 *)priv->ule_skb->tail - 3) << 16 |
 585                                        *((u8 *)priv->ule_skb->tail - 2) << 8 |
 586                                        *((u8 *)priv->ule_skb->tail - 1);
 587                         if (ule_crc != expected_crc) {
 588                                 printk(KERN_WARNING "%lu: CRC32 check FAILED: %#lx / %#lx, SNDU len %d type %#x, ts_remain %d, next 2: %x.\n",
 589                                        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);
 590
 591 #ifdef ULE_DEBUG
 592                                 hexdump( iov[0].iov_base, iov[0].iov_len );
 593                                 hexdump( iov[1].iov_base, iov[1].iov_len );
 594                                 hexdump( iov[2].iov_base, iov[2].iov_len );
 595
 596                                 if (ule_where == ule_hist) {
 597                                         hexdump( &ule_hist[98*TS_SZ], TS_SZ );
 598                                         hexdump( &ule_hist[99*TS_SZ], TS_SZ );
 599                                 } else if (ule_where == &ule_hist[TS_SZ]) {
 600                                         hexdump( &ule_hist[99*TS_SZ], TS_SZ );
 601                                         hexdump( ule_hist, TS_SZ );
 602                                 } else {
 603                                         hexdump( ule_where - TS_SZ - TS_SZ, TS_SZ );
 604                                         hexdump( ule_where - TS_SZ, TS_SZ );
 605                                 }
 606                                 ule_dump = 1;
 607 #endif
 608
 609                                 ((struct dvb_net_priv *) dev->priv)->stats.rx_errors++;
 610                                 ((struct dvb_net_priv *) dev->priv)->stats.rx_crc_errors++;
 611                                 dev_kfree_skb(priv->ule_skb);
 612                         } else {
 613                                 /* CRC32 verified OK. */
 614                                 /* Handle ULE Extension Headers. */
 615                                 if (priv->ule_sndu_type < 1536) {
 616                                         /* There is an extension header.  Handle it accordingly. */
 617                                         int l = handle_ule_extensions( priv );
 618                                         if (l < 0) {
 619                                                 /* Mandatory extension header unknown or TEST SNDU.  Drop it. */
 620                                                 // printk( KERN_WARNING "Dropping SNDU, extension headers.\n" );
 621                                                 dev_kfree_skb( priv->ule_skb );
 622                                                 goto sndu_done;
 623                                         }
 624                                         skb_pull( priv->ule_skb, l );
 625                                 }
 626
 627                                 /* CRC32 was OK. Remove it from skb. */
 628                                 priv->ule_skb->tail -= 4;
 629                                 priv->ule_skb->len -= 4;
 630
 631                                 /* Filter on receiver's destination MAC address, if present. */
 632                                 if (!priv->ule_dbit) {
 633                                         /* The destination MAC address is the next data in the skb. */
 634                                         if (memcmp( priv->ule_skb->data, dev->dev_addr, ETH_ALEN )) {
 635                                                 /* MAC addresses don't match.  Drop SNDU. */
 636                                                 // printk( KERN_WARNING "Dropping SNDU, MAC address.\n" );
 637                                                 dev_kfree_skb( priv->ule_skb );
 638                                                 goto sndu_done;
 639                                         }
 640                                         if (! priv->ule_bridged) {
 641                                                 skb_push( priv->ule_skb, ETH_ALEN + 2 );
 642                                                 ethh = (struct ethhdr *)priv->ule_skb->data;
 643                                                 memcpy( ethh->h_dest, ethh->h_source, ETH_ALEN );
 644                                                 memset( ethh->h_source, 0, ETH_ALEN );
 645                                                 ethh->h_proto = htons( priv->ule_sndu_type );
 646                                         } else {
 647                                                 /* Skip the Receiver destination MAC address. */
 648                                                 skb_pull( priv->ule_skb, ETH_ALEN );
 649                                         }
 650                                 } else {
 651                                         if (! priv->ule_bridged) {
 652                                                 skb_push( priv->ule_skb, ETH_HLEN );
 653                                                 ethh = (struct ethhdr *)priv->ule_skb->data;
 654                                                 memcpy( ethh->h_dest, dev->dev_addr, ETH_ALEN );
 655                                                 memset( ethh->h_source, 0, ETH_ALEN );
 656                                                 ethh->h_proto = htons( priv->ule_sndu_type );
 657                                         } else {
 658                                                 /* skb is in correct state; nothing to do. */
 659                                         }
 660                                 }
 661                                 priv->ule_bridged = 0;
 662
 663                                 /* Stuff into kernel's protocol stack. */
 664                                 priv->ule_skb->protocol = dvb_net_eth_type_trans(priv->ule_skb, dev);
 665                                 /* If D-bit is set (i.e. destination MAC address not present),
 666                                  * receive the packet anyhow. */
 667                                 /* if (priv->ule_dbit && skb->pkt_type == PACKET_OTHERHOST)
 668                                         priv->ule_skb->pkt_type = PACKET_HOST; */
 669                                 ((struct dvb_net_priv *) dev->priv)->stats.rx_packets++;
 670                                 ((struct dvb_net_priv *) dev->priv)->stats.rx_bytes += priv->ule_skb->len;
 671                                 netif_rx(priv->ule_skb);
 672                         }
 673                         sndu_done:
 674                         /* Prepare for next SNDU. */
 675                         reset_ule(priv);
 676                 }
 677
 678                 /* More data in current TS (look at the bytes following the CRC32)? */
 679                 if (ts_remain >= 2 && *((unsigned short *)from_where) != 0xFFFF) {
 680                         /* Next ULE SNDU starts right there. */
 681                         new_ts = 0;
 682                         priv->ule_skb = NULL;
 683                         priv->ule_sndu_type_1 = 0;
 684                         priv->ule_sndu_len = 0;
 685                         // printk(KERN_WARNING "More data in current TS: [%#x %#x %#x %#x]\n",
 686                         //      *(from_where + 0), *(from_where + 1),
 687                         //      *(from_where + 2), *(from_where + 3));
 688                         // printk(KERN_WARNING "ts @ %p, stopped @ %p:\n", ts, from_where + 0);
 689                         // hexdump(ts, 188);
 690                 } else {
 691                         new_ts = 1;
 692                         ts += TS_SZ;
 693                         priv->ts_count++;
 694                         if (priv->ule_skb == NULL) {
 695                                 priv->need_pusi = 1;
 696                                 priv->ule_sndu_type_1 = 0;
 697                                 priv->ule_sndu_len = 0;
 698                         }
 699                 }
 700         }       /* for all available TS cells */
 701 }
 702
 703 static int dvb_net_ts_callback(const u8 *buffer1, size_t buffer1_len,
 704                                const u8 *buffer2, size_t buffer2_len,
 705                                struct dmx_ts_feed *feed, enum dmx_success success)
 706 {
 707         struct net_device *dev = feed->priv;
 708
 709         if (buffer2 != 0)
 710                 printk(KERN_WARNING "buffer2 not 0: %p.\n", buffer2);
 711         if (buffer1_len > 32768)
 712                 printk(KERN_WARNING "length > 32k: %zu.\n", buffer1_len);
 713         /* printk("TS callback: %u bytes, %u TS cells @ %p.\n",
 714                   buffer1_len, buffer1_len / TS_SZ, buffer1); */
 715         dvb_net_ule(dev, buffer1, buffer1_len);
 716         return 0;
 717 }
 718
 719
 720 static void dvb_net_sec(struct net_device *dev, u8 *pkt, int pkt_len)
 721 {
 722         u8 *eth;
 723         struct sk_buff *skb;
 724         struct net_device_stats *stats = &(((struct dvb_net_priv *) dev->priv)->stats);
 725         int snap = 0;
 726
 727         /* note: pkt_len includes a 32bit checksum */
 728         if (pkt_len < 16) {
 729                 printk("%s: IP/MPE packet length = %d too small.\n",
 730                         dev->name, pkt_len);
 731                 stats->rx_errors++;
 732                 stats->rx_length_errors++;
 733                 return;
 734         }
 735 /* it seems some ISPs manage to screw up here, so we have to
 736  * relax the error checks... */
 737 #if 0
 738         if ((pkt[5] & 0xfd) != 0xc1) {
 739                 /* drop scrambled or broken packets */
 740 #else
 741         if ((pkt[5] & 0x3c) != 0x00) {
 742                 /* drop scrambled */
 743 #endif
 744                 stats->rx_errors++;
 745                 stats->rx_crc_errors++;
 746                 return;
 747         }
 748         if (pkt[5] & 0x02) {
 749                 /* handle LLC/SNAP, see rfc-1042 */
 750                 if (pkt_len < 24 || memcmp(&pkt[12], "\xaa\xaa\x03\0\0\0", 6)) {
 751                         stats->rx_dropped++;
 752                         return;
 753                 }
 754                 snap = 8;
 755         }
 756         if (pkt[7]) {
 757                 /* FIXME: assemble datagram from multiple sections */
 758                 stats->rx_errors++;
 759                 stats->rx_frame_errors++;
 760                 return;
 761         }
 762
 763         /* we have 14 byte ethernet header (ip header follows);
 764          * 12 byte MPE header; 4 byte checksum; + 2 byte alignment, 8 byte LLC/SNAP
 765          */
 766         if (!(skb = dev_alloc_skb(pkt_len - 4 - 12 + 14 + 2 - snap))) {
 767                 //printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n", dev->name);
 768                 stats->rx_dropped++;
 769                 return;
 770         }
 771         skb_reserve(skb, 2);    /* longword align L3 header */
 772         skb->dev = dev;
 773
 774         /* copy L3 payload */
 775         eth = (u8 *) skb_put(skb, pkt_len - 12 - 4 + 14 - snap);
 776         memcpy(eth + 14, pkt + 12 + snap, pkt_len - 12 - 4 - snap);
 777
 778         /* create ethernet header: */
 779         eth[0]=pkt[0x0b];
 780         eth[1]=pkt[0x0a];
 781         eth[2]=pkt[0x09];
 782         eth[3]=pkt[0x08];
 783         eth[4]=pkt[0x04];
 784         eth[5]=pkt[0x03];
 785
 786         eth[6]=eth[7]=eth[8]=eth[9]=eth[10]=eth[11]=0;
 787
 788         if (snap) {
 789                 eth[12] = pkt[18];
 790                 eth[13] = pkt[19];
 791         } else {
 792                 /* protocol numbers are from rfc-1700 or
 793                  * http://www.iana.org/assignments/ethernet-numbers
 794                  */
 795                 if (pkt[12] >> 4 == 6) { /* version field from IP header */
 796                         eth[12] = 0x86; /* IPv6 */
 797                         eth[13] = 0xdd;
 798                 } else {
 799                         eth[12] = 0x08; /* IPv4 */
 800                         eth[13] = 0x00;
 801                 }
 802         }
 803
 804         skb->protocol = dvb_net_eth_type_trans(skb, dev);
 805
 806         stats->rx_packets++;
 807         stats->rx_bytes+=skb->len;
 808         netif_rx(skb);
 809 }
 810
 811 static int dvb_net_sec_callback(const u8 *buffer1, size_t buffer1_len,
 812                  const u8 *buffer2, size_t buffer2_len,
 813                  struct dmx_section_filter *filter,
 814                  enum dmx_success success)
 815 {
 816         struct net_device *dev = filter->priv;
 817
 818         /**
 819          * we rely on the DVB API definition where exactly one complete
 820          * section is delivered in buffer1
 821          */
 822         dvb_net_sec (dev, (u8*) buffer1, buffer1_len);
 823         return 0;
 824 }
 825
 826 static int dvb_net_tx(struct sk_buff *skb, struct net_device *dev)
 827 {
 828         dev_kfree_skb(skb);
 829         return 0;
 830 }
 831
 832 static u8 mask_normal[6]={0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
 833 static u8 mask_allmulti[6]={0xff, 0xff, 0xff, 0x00, 0x00, 0x00};
 834 static u8 mac_allmulti[6]={0x01, 0x00, 0x5e, 0x00, 0x00, 0x00};
 835 static u8 mask_promisc[6]={0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
 836
 837 static int dvb_net_filter_sec_set(struct net_device *dev,
 838                    struct dmx_section_filter **secfilter,
 839                    u8 *mac, u8 *mac_mask)
 840 {
 841         struct dvb_net_priv *priv = dev->priv;
 842         int ret;
 843
 844         *secfilter=NULL;
 845         ret = priv->secfeed->allocate_filter(priv->secfeed, secfilter);
 846         if (ret<0) {
 847                 printk("%s: could not get filter\n", dev->name);
 848                 return ret;
 849         }
 850
 851         (*secfilter)->priv=(void *) dev;
 852
 853         memset((*secfilter)->filter_value, 0x00, DMX_MAX_FILTER_SIZE);
 854         memset((*secfilter)->filter_mask,  0x00, DMX_MAX_FILTER_SIZE);
 855         memset((*secfilter)->filter_mode,  0xff, DMX_MAX_FILTER_SIZE);
 856
 857         (*secfilter)->filter_value[0]=0x3e;
 858         (*secfilter)->filter_value[3]=mac[5];
 859         (*secfilter)->filter_value[4]=mac[4];
 860         (*secfilter)->filter_value[8]=mac[3];
 861         (*secfilter)->filter_value[9]=mac[2];
 862         (*secfilter)->filter_value[10]=mac[1];
 863         (*secfilter)->filter_value[11]=mac[0];
 864
 865         (*secfilter)->filter_mask[0] = 0xff;
 866         (*secfilter)->filter_mask[3] = mac_mask[5];
 867         (*secfilter)->filter_mask[4] = mac_mask[4];
 868         (*secfilter)->filter_mask[8] = mac_mask[3];
 869         (*secfilter)->filter_mask[9] = mac_mask[2];
 870         (*secfilter)->filter_mask[10] = mac_mask[1];
 871         (*secfilter)->filter_mask[11]=mac_mask[0];
 872
 873         dprintk("%s: filter mac=%02x %02x %02x %02x %02x %02x\n",
 874                dev->name, mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
 875         dprintk("%s: filter mask=%02x %02x %02x %02x %02x %02x\n",
 876                dev->name, mac_mask[0], mac_mask[1], mac_mask[2],
 877                mac_mask[3], mac_mask[4], mac_mask[5]);
 878
 879         return 0;
 880 }
 881
 882 static int dvb_net_feed_start(struct net_device *dev)
 883 {
 884         int ret, i;
 885         struct dvb_net_priv *priv = dev->priv;
 886         struct dmx_demux *demux = priv->demux;
 887         unsigned char *mac = (unsigned char *) dev->dev_addr;
 888
 889         dprintk("%s: rx_mode %i\n", __FUNCTION__, priv->rx_mode);
 890         if (priv->tsfeed || priv->secfeed || priv->secfilter || priv->multi_secfilter[0])
 891                 printk("%s: BUG %d\n", __FUNCTION__, __LINE__);
 892
 893         priv->secfeed=NULL;
 894         priv->secfilter=NULL;
 895         priv->tsfeed = NULL;
 896
 897         if (priv->feedtype == DVB_NET_FEEDTYPE_MPE) {
 898                 dprintk("%s: alloc secfeed\n", __FUNCTION__);
 899                 ret=demux->allocate_section_feed(demux, &priv->secfeed,
 900                                          dvb_net_sec_callback);
 901                 if (ret<0) {
 902                         printk("%s: could not allocate section feed\n", dev->name);
 903                         return ret;
 904                 }
 905
 906                 ret = priv->secfeed->set(priv->secfeed, priv->pid, 32768, 1);
 907
 908                 if (ret<0) {
 909                         printk("%s: could not set section feed\n", dev->name);
 910                         priv->demux->release_section_feed(priv->demux, priv->secfeed);
 911                         priv->secfeed=NULL;
 912                         return ret;
 913                 }
 914
 915                 if (priv->rx_mode != RX_MODE_PROMISC) {
 916                         dprintk("%s: set secfilter\n", __FUNCTION__);
 917                         dvb_net_filter_sec_set(dev, &priv->secfilter, mac, mask_normal);
 918                 }
 919
 920                 switch (priv->rx_mode) {
 921                 case RX_MODE_MULTI:
 922                         for (i = 0; i < priv->multi_num; i++) {
 923                                 dprintk("%s: set multi_secfilter[%d]\n", __FUNCTION__, i);
 924                                 dvb_net_filter_sec_set(dev, &priv->multi_secfilter[i],
 925                                                        priv->multi_macs[i], mask_normal);
 926                         }
 927                         break;
 928                 case RX_MODE_ALL_MULTI:
 929                         priv->multi_num=1;
 930                         dprintk("%s: set multi_secfilter[0]\n", __FUNCTION__);
 931                         dvb_net_filter_sec_set(dev, &priv->multi_secfilter[0],
 932                                                mac_allmulti, mask_allmulti);
 933                         break;
 934                 case RX_MODE_PROMISC:
 935                         priv->multi_num=0;
 936                         dprintk("%s: set secfilter\n", __FUNCTION__);
 937                         dvb_net_filter_sec_set(dev, &priv->secfilter, mac, mask_promisc);
 938                         break;
 939                 }
 940
 941                 dprintk("%s: start filtering\n", __FUNCTION__);
 942                 priv->secfeed->start_filtering(priv->secfeed);
 943         } else if (priv->feedtype == DVB_NET_FEEDTYPE_ULE) {
 944                 struct timespec timeout = { 0, 30000000 }; // 30 msec
 945
 946                 /* we have payloads encapsulated in TS */
 947                 dprintk("%s: alloc tsfeed\n", __FUNCTION__);
 948                 ret = demux->allocate_ts_feed(demux, &priv->tsfeed, dvb_net_ts_callback);
 949                 if (ret < 0) {
 950                         printk("%s: could not allocate ts feed\n", dev->name);
 951                         return ret;
 952                 }
 953
 954                 /* Set netdevice pointer for ts decaps callback. */
 955                 priv->tsfeed->priv = (void *)dev;
 956                 ret = priv->tsfeed->set(priv->tsfeed, priv->pid,
 957                                         TS_PACKET, DMX_TS_PES_OTHER,
 958                                         32768,     /* circular buffer size */
 959                                         timeout);
 960
 961                 if (ret < 0) {
 962                         printk("%s: could not set ts feed\n", dev->name);
 963                         priv->demux->release_ts_feed(priv->demux, priv->tsfeed);
 964                         priv->tsfeed = NULL;
 965                         return ret;
 966                 }
 967
 968                 dprintk("%s: start filtering\n", __FUNCTION__);
 969                 priv->tsfeed->start_filtering(priv->tsfeed);
 970         } else
 971                 return -EINVAL;
 972
 973         return 0;
 974 }
 975
 976 static int dvb_net_feed_stop(struct net_device *dev)
 977 {
 978         struct dvb_net_priv *priv = dev->priv;
 979         int i;
 980
 981         dprintk("%s\n", __FUNCTION__);
 982         if (priv->feedtype == DVB_NET_FEEDTYPE_MPE) {
 983                 if (priv->secfeed) {
 984                         if (priv->secfeed->is_filtering) {
 985                                 dprintk("%s: stop secfeed\n", __FUNCTION__);
 986                                 priv->secfeed->stop_filtering(priv->secfeed);
 987                         }
 988
 989                         if (priv->secfilter) {
 990                                 dprintk("%s: release secfilter\n", __FUNCTION__);
 991                                 priv->secfeed->release_filter(priv->secfeed,
 992                                                               priv->secfilter);
 993                                 priv->secfilter=NULL;
 994                         }
 995
 996                         for (i=0; i<priv->multi_num; i++) {
 997                                 if (priv->multi_secfilter[i]) {
 998                                         dprintk("%s: release multi_filter[%d]\n",
 999                                                 __FUNCTION__, i);
1000                                         priv->secfeed->release_filter(priv->secfeed,
1001                                                                       priv->multi_secfilter[i]);
1002                                         priv->multi_secfilter[i] = NULL;
1003                                 }
1004                         }
1005
1006                         priv->demux->release_section_feed(priv->demux, priv->secfeed);
1007                         priv->secfeed = NULL;
1008                 } else
1009                         printk("%s: no feed to stop\n", dev->name);
1010         } else if (priv->feedtype == DVB_NET_FEEDTYPE_ULE) {
1011                 if (priv->tsfeed) {
1012                         if (priv->tsfeed->is_filtering) {
1013                                 dprintk("%s: stop tsfeed\n", __FUNCTION__);
1014                                 priv->tsfeed->stop_filtering(priv->tsfeed);
1015                         }
1016                         priv->demux->release_ts_feed(priv->demux, priv->tsfeed);
1017                         priv->tsfeed = NULL;
1018                 }
1019                 else
1020                         printk("%s: no ts feed to stop\n", dev->name);
1021         } else
1022                 return -EINVAL;
1023         return 0;
1024 }
1025
1026
1027 static int dvb_set_mc_filter (struct net_device *dev, struct dev_mc_list *mc)
1028 {
1029         struct dvb_net_priv *priv = dev->priv;
1030
1031         if (priv->multi_num == DVB_NET_MULTICAST_MAX)
1032                 return -ENOMEM;
1033
1034         memcpy(priv->multi_macs[priv->multi_num], mc->dmi_addr, 6);
1035
1036         priv->multi_num++;
1037         return 0;
1038 }
1039
1040
1041 static void wq_set_multicast_list (void *data)
1042 {
1043         struct net_device *dev = data;
1044         struct dvb_net_priv *priv = dev->priv;
1045
1046         dvb_net_feed_stop(dev);
1047
1048         priv->rx_mode = RX_MODE_UNI;
1049
1050         if (dev->flags & IFF_PROMISC) {
1051                 dprintk("%s: promiscuous mode\n", dev->name);
1052                 priv->rx_mode = RX_MODE_PROMISC;
1053         } else if ((dev->flags & IFF_ALLMULTI)) {
1054                 dprintk("%s: allmulti mode\n", dev->name);
1055                 priv->rx_mode = RX_MODE_ALL_MULTI;
1056         } else if (dev->mc_count) {
1057                 int mci;
1058                 struct dev_mc_list *mc;
1059
1060                 dprintk("%s: set_mc_list, %d entries\n",
1061                         dev->name, dev->mc_count);
1062
1063                 priv->rx_mode = RX_MODE_MULTI;
1064                 priv->multi_num = 0;
1065
1066                 for (mci = 0, mc=dev->mc_list;
1067                      mci < dev->mc_count;
1068                      mc = mc->next, mci++) {
1069                         dvb_set_mc_filter(dev, mc);
1070                 }
1071         }
1072
1073         dvb_net_feed_start(dev);
1074 }
1075
1076
1077 static void dvb_net_set_multicast_list (struct net_device *dev)
1078 {
1079         struct dvb_net_priv *priv = dev->priv;
1080         schedule_work(&priv->set_multicast_list_wq);
1081 }
1082
1083
1084 static void wq_restart_net_feed (void *data)
1085 {
1086         struct net_device *dev = data;
1087
1088         if (netif_running(dev)) {
1089                 dvb_net_feed_stop(dev);
1090                 dvb_net_feed_start(dev);
1091         }
1092 }
1093
1094
1095 static int dvb_net_set_mac (struct net_device *dev, void *p)
1096 {
1097         struct dvb_net_priv *priv = dev->priv;
1098         struct sockaddr *addr=p;
1099
1100         memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1101
1102         if (netif_running(dev))
1103                 schedule_work(&priv->restart_net_feed_wq);
1104
1105         return 0;
1106 }
1107
1108
1109 static int dvb_net_open(struct net_device *dev)
1110 {
1111         struct dvb_net_priv *priv = dev->priv;
1112
1113         priv->in_use++;
1114         dvb_net_feed_start(dev);
1115         return 0;
1116 }
1117
1118
1119 static int dvb_net_stop(struct net_device *dev)
1120 {
1121         struct dvb_net_priv *priv = dev->priv;
1122
1123         priv->in_use--;
1124         return dvb_net_feed_stop(dev);
1125 }
1126
1127 static struct net_device_stats * dvb_net_get_stats(struct net_device *dev)
1128 {
1129         return &((struct dvb_net_priv*) dev->priv)->stats;
1130 }
1131
1132 static void dvb_net_setup(struct net_device *dev)
1133 {
1134         ether_setup(dev);
1135
1136         dev->open               = dvb_net_open;
1137         dev->stop               = dvb_net_stop;
1138         dev->hard_start_xmit    = dvb_net_tx;
1139         dev->get_stats          = dvb_net_get_stats;
1140         dev->set_multicast_list = dvb_net_set_multicast_list;
1141         dev->set_mac_address    = dvb_net_set_mac;
1142         dev->mtu                = 4096;
1143         dev->mc_count           = 0;
1144         dev->hard_header_cache  = NULL;
1145         dev->flags |= IFF_NOARP;
1146 }
1147
1148 static int get_if(struct dvb_net *dvbnet)
1149 {
1150         int i;
1151
1152         for (i=0; i<DVB_NET_DEVICES_MAX; i++)
1153                 if (!dvbnet->state[i])
1154                         break;
1155
1156         if (i == DVB_NET_DEVICES_MAX)
1157                 return -1;
1158
1159         dvbnet->state[i]=1;
1160         return i;
1161 }
1162
1163 static int dvb_net_add_if(struct dvb_net *dvbnet, u16 pid, u8 feedtype)
1164 {
1165         struct net_device *net;
1166         struct dvb_net_priv *priv;
1167         int result;
1168         int if_num;
1169
1170         if (feedtype != DVB_NET_FEEDTYPE_MPE && feedtype != DVB_NET_FEEDTYPE_ULE)
1171                 return -EINVAL;
1172         if ((if_num = get_if(dvbnet)) < 0)
1173                 return -EINVAL;
1174
1175         net = alloc_netdev(sizeof(struct dvb_net_priv), "dvb", dvb_net_setup);
1176         if (!net)
1177                 return -ENOMEM;
1178
1179         if (dvbnet->dvbdev->id)
1180                 snprintf(net->name, IFNAMSIZ, "dvb%d%u%d",
1181                          dvbnet->dvbdev->adapter->num, dvbnet->dvbdev->id, if_num);
1182         else
1183                 /* compatibility fix to keep dvb0_0 format */
1184                 snprintf(net->name, IFNAMSIZ, "dvb%d_%d",
1185                          dvbnet->dvbdev->adapter->num, if_num);
1186
1187         net->addr_len = 6;
1188         memcpy(net->dev_addr, dvbnet->dvbdev->adapter->proposed_mac, 6);
1189
1190         dvbnet->device[if_num] = net;
1191
1192         priv = net->priv;
1193         priv->demux = dvbnet->demux;
1194         priv->pid = pid;
1195         priv->rx_mode = RX_MODE_UNI;
1196         priv->need_pusi = 1;
1197         priv->tscc = 0;
1198         priv->feedtype = feedtype;
1199         reset_ule(priv);
1200
1201         INIT_WORK(&priv->set_multicast_list_wq, wq_set_multicast_list, net);
1202         INIT_WORK(&priv->restart_net_feed_wq, wq_restart_net_feed, net);
1203
1204         net->base_addr = pid;
1205
1206         if ((result = register_netdev(net)) < 0) {
1207                 dvbnet->device[if_num] = NULL;
1208                 free_netdev(net);
1209                 return result;
1210         }
1211         printk("dvb_net: created network interface %s\n", net->name);
1212
1213         return if_num;
1214 }
1215
1216 static int dvb_net_remove_if(struct dvb_net *dvbnet, unsigned int num)
1217 {
1218         struct net_device *net = dvbnet->device[num];
1219         struct dvb_net_priv *priv;
1220
1221         if (!dvbnet->state[num])
1222                 return -EINVAL;
1223         priv = net->priv;
1224         if (priv->in_use)
1225                 return -EBUSY;
1226
1227         dvb_net_stop(net);
1228         flush_scheduled_work();
1229         printk("dvb_net: removed network interface %s\n", net->name);
1230         unregister_netdev(net);
1231         dvbnet->state[num]=0;
1232         dvbnet->device[num] = NULL;
1233         free_netdev(net);
1234
1235         return 0;
1236 }
1237
1238 static int dvb_net_do_ioctl(struct inode *inode, struct file *file,
1239                   unsigned int cmd, void *parg)
1240 {
1241         struct dvb_device *dvbdev = file->private_data;
1242         struct dvb_net *dvbnet = dvbdev->priv;
1243
1244         if (((file->f_flags&O_ACCMODE)==O_RDONLY))
1245                 return -EPERM;
1246
1247         switch (cmd) {
1248         case NET_ADD_IF:
1249         {
1250                 struct dvb_net_if *dvbnetif = parg;
1251                 int result;
1252
1253                 if (!capable(CAP_SYS_ADMIN))
1254                         return -EPERM;
1255
1256                 if (!try_module_get(dvbdev->adapter->module))
1257                         return -EPERM;
1258
1259                 result=dvb_net_add_if(dvbnet, dvbnetif->pid, dvbnetif->feedtype);
1260                 if (result<0) {
1261                         module_put(dvbdev->adapter->module);
1262                         return result;
1263                 }
1264                 dvbnetif->if_num=result;
1265                 break;
1266         }
1267         case NET_GET_IF:
1268         {
1269                 struct net_device *netdev;
1270                 struct dvb_net_priv *priv_data;
1271                 struct dvb_net_if *dvbnetif = parg;
1272
1273                 if (dvbnetif->if_num >= DVB_NET_DEVICES_MAX ||
1274                     !dvbnet->state[dvbnetif->if_num])
1275                         return -EINVAL;
1276
1277                 netdev = dvbnet->device[dvbnetif->if_num];
1278
1279                 priv_data = netdev->priv;
1280                 dvbnetif->pid=priv_data->pid;
1281                 dvbnetif->feedtype=priv_data->feedtype;
1282                 break;
1283         }
1284         case NET_REMOVE_IF:
1285         {
1286                 int ret;
1287
1288                 if (!capable(CAP_SYS_ADMIN))
1289                         return -EPERM;
1290                 if ((unsigned int) parg >= DVB_NET_DEVICES_MAX)
1291                         return -EINVAL;
1292                 ret = dvb_net_remove_if(dvbnet, (unsigned int) parg);
1293                 if (!ret)
1294                         module_put(dvbdev->adapter->module);
1295                 return ret;
1296         }
1297
1298         /* binary compatiblity cruft */
1299         case __NET_ADD_IF_OLD:
1300         {
1301                 struct __dvb_net_if_old *dvbnetif = parg;
1302                 int result;
1303
1304                 if (!capable(CAP_SYS_ADMIN))
1305                         return -EPERM;
1306
1307                 if (!try_module_get(dvbdev->adapter->module))
1308                         return -EPERM;
1309
1310                 result=dvb_net_add_if(dvbnet, dvbnetif->pid, DVB_NET_FEEDTYPE_MPE);
1311                 if (result<0) {
1312                         module_put(dvbdev->adapter->module);
1313                         return result;
1314                 }
1315                 dvbnetif->if_num=result;
1316                 break;
1317         }
1318         case __NET_GET_IF_OLD:
1319         {
1320                 struct net_device *netdev;
1321                 struct dvb_net_priv *priv_data;
1322                 struct __dvb_net_if_old *dvbnetif = parg;
1323
1324                 if (dvbnetif->if_num >= DVB_NET_DEVICES_MAX ||
1325                     !dvbnet->state[dvbnetif->if_num])
1326                         return -EINVAL;
1327
1328                 netdev = dvbnet->device[dvbnetif->if_num];
1329
1330                 priv_data = netdev->priv;
1331                 dvbnetif->pid=priv_data->pid;
1332                 break;
1333         }
1334         default:
1335                 return -ENOTTY;
1336         }
1337         return 0;
1338 }
1339
1340 static int dvb_net_ioctl(struct inode *inode, struct file *file,
1341               unsigned int cmd, unsigned long arg)
1342 {
1343         return dvb_usercopy(inode, file, cmd, arg, dvb_net_do_ioctl);
1344 }
1345
1346 static struct file_operations dvb_net_fops = {
1347         .owner = THIS_MODULE,
1348         .ioctl = dvb_net_ioctl,
1349         .open = dvb_generic_open,
1350         .release = dvb_generic_release,
1351 };
1352
1353 static struct dvb_device dvbdev_net = {
1354         .priv = NULL,
1355         .users = 1,
1356         .writers = 1,
1357         .fops = &dvb_net_fops,
1358 };
1359
1360
1361 void dvb_net_release (struct dvb_net *dvbnet)
1362 {
1363         int i;
1364
1365         dvb_unregister_device(dvbnet->dvbdev);
1366
1367         for (i=0; i<DVB_NET_DEVICES_MAX; i++) {
1368                 if (!dvbnet->state[i])
1369                         continue;
1370                 dvb_net_remove_if(dvbnet, i);
1371         }
1372 }
1373 EXPORT_SYMBOL(dvb_net_release);
1374
1375
1376 int dvb_net_init (struct dvb_adapter *adap, struct dvb_net *dvbnet,
1377                   struct dmx_demux *dmx)
1378 {
1379         int i;
1380
1381         dvbnet->demux = dmx;
1382
1383         for (i=0; i<DVB_NET_DEVICES_MAX; i++)
1384                 dvbnet->state[i] = 0;
1385
1386         dvb_register_device (adap, &dvbnet->dvbdev, &dvbdev_net,
1387                              dvbnet, DVB_DEVICE_NET);
1388
1389         return 0;
1390 }
1391 EXPORT_SYMBOL(dvb_net_init);