drivers/media/dvb/dvb-core/dvb_net.c

   1 /*
   2  * dvb_net.c
   3  *
   4  * Copyright (C) 2001 Convergence integrated media GmbH
   5  *                    Ralph Metzler <ralph@convergence.de>
   6  * Copyright (C) 2002 Ralph Metzler <rjkm@metzlerbros.de>
   7  *
   8  * ULE Decapsulation code:
   9  * Copyright (C) 2003, 2004 gcs - Global Communication & Services GmbH.
  10  *                      and Department of Scientific Computing
  11  *                          Paris Lodron University of Salzburg.
  12  *                    Hilmar Linder <hlinder@cosy.sbg.ac.at>
  13  *                and Wolfram Stering <wstering@cosy.sbg.ac.at>
  14  *
  15  * ULE Decaps according to 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         char name[6];
 127         u16 pid;
 128         struct dvb_net *host;
 129         struct dmx_demux *demux;
 130         struct dmx_section_feed *secfeed;
 131         struct dmx_section_filter *secfilter;
 132         struct dmx_ts_feed *tsfeed;
 133         int multi_num;
 134         struct dmx_section_filter *multi_secfilter[DVB_NET_MULTICAST_MAX];
 135         unsigned char multi_macs[DVB_NET_MULTICAST_MAX][6];
 136         int rx_mode;
 137 #define RX_MODE_UNI 0
 138 #define RX_MODE_MULTI 1
 139 #define RX_MODE_ALL_MULTI 2
 140 #define RX_MODE_PROMISC 3
 141         struct work_struct set_multicast_list_wq;
 142         struct work_struct restart_net_feed_wq;
 143         unsigned char feedtype;                 /* Either FEED_TYPE_ or FEED_TYPE_ULE */
 144         int need_pusi;                          /* Set to 1, if synchronization on PUSI required. */
 145         unsigned char tscc;                     /* TS continuity counter after sync on PUSI. */
 146         struct sk_buff *ule_skb;                /* ULE SNDU decodes into this buffer. */
 147         unsigned char *ule_next_hdr;            /* Pointer into skb to next ULE extension header. */
 148         unsigned short ule_sndu_len;            /* ULE SNDU length in bytes, w/o D-Bit. */
 149         unsigned short ule_sndu_type;           /* ULE SNDU type field, complete. */
 150         unsigned char ule_sndu_type_1;          /* ULE SNDU type field, if split across 2 TS cells. */
 151         unsigned char ule_dbit;                 /* Whether the DestMAC address present
 152                                                  * or not (bit is set). */
 153         unsigned char ule_bridged;              /* Whether the ULE_BRIDGED extension header was found. */
 154         int ule_sndu_remain;                    /* Nr. of bytes still required for current ULE SNDU. */
 155         unsigned long ts_count;                 /* Current ts cell counter. */
 156 };
 157
 158
 159 /**
 160  *      Determine the packet's protocol ID. The rule here is that we
 161  *      assume 802.3 if the type field is short enough to be a length.
 162  *      This is normal practice and works for any 'now in use' protocol.
 163  *
 164  *  stolen from eth.c out of the linux kernel, hacked for dvb-device
 165  *  by Michael Holzt <kju@debian.org>
 166  */
 167 static unsigned short dvb_net_eth_type_trans(struct sk_buff *skb,
 168                                       struct net_device *dev)
 169 {
 170         struct ethhdr *eth;
 171         unsigned char *rawp;
 172
 173         skb->mac.raw=skb->data;
 174         skb_pull(skb,dev->hard_header_len);
 175 #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,8)
 176         eth = skb->mac.ethernet;
 177 #else
 178         eth = eth_hdr(skb);
 179 #endif
 180
 181         if (*eth->h_dest & 1) {
 182                 if(memcmp(eth->h_dest,dev->broadcast, ETH_ALEN)==0)
 183                         skb->pkt_type=PACKET_BROADCAST;
 184                 else
 185                         skb->pkt_type=PACKET_MULTICAST;
 186         }
 187
 188         if (ntohs(eth->h_proto) >= 1536)
 189                 return eth->h_proto;
 190
 191         rawp = skb->data;
 192
 193         /**
 194          *      This is a magic hack to spot IPX packets. Older Novell breaks
 195          *      the protocol design and runs IPX over 802.3 without an 802.2 LLC
 196          *      layer. We look for FFFF which isn't a used 802.2 SSAP/DSAP. This
 197          *      won't work for fault tolerant netware but does for the rest.
 198          */
 199         if (*(unsigned short *)rawp == 0xFFFF)
 200                 return htons(ETH_P_802_3);
 201
 202         /**
 203          *      Real 802.2 LLC
 204          */
 205         return htons(ETH_P_802_2);
 206 }
 207
 208 #define TS_SZ   188
 209 #define TS_SYNC 0x47
 210 #define TS_TEI  0x80
 211 #define TS_SC   0xC0
 212 #define TS_PUSI 0x40
 213 #define TS_AF_A 0x20
 214 #define TS_AF_D 0x10
 215
 216 /* ULE Extension Header handlers. */
 217
 218 #define ULE_TEST        0
 219 #define ULE_BRIDGED     1
 220
 221 int ule_test_sndu( struct dvb_net_priv *p )
 222 {
 223         return -1;
 224 }
 225
 226 int ule_bridged_sndu( struct dvb_net_priv *p )
 227 {
 228         /* BRIDGE SNDU handling sucks in draft-ietf-ipdvb-ule-03.txt.
 229          * This has to be the last extension header, otherwise it won't work.
 230          * Blame the authors!
 231          */
 232         p->ule_bridged = 1;
 233         return 0;
 234 }
 235
 236
 237 /** Handle ULE extension headers.
 238  *  Function is called after a successful CRC32 verification of an ULE SNDU to complete its decoding.
 239  *  Returns: >= 0: nr. of bytes consumed by next extension header
 240  *           -1:   Mandatory extension header that is not recognized or TEST SNDU; discard.
 241  */
 242 static int handle_one_ule_extension( struct dvb_net_priv *p )
 243 {
 244         /* Table of mandatory extension header handlers.  The header type is the index. */
 245         static int (*ule_mandatory_ext_handlers[255])( struct dvb_net_priv *p ) =
 246                 { [0] = ule_test_sndu, [1] = ule_bridged_sndu, [2] = NULL,  };
 247
 248         /* Table of optional extension header handlers.  The header type is the index. */
 249         static int (*ule_optional_ext_handlers[255])( struct dvb_net_priv *p ) = { NULL, };
 250
 251         int ext_len = 0;
 252         unsigned char hlen = (p->ule_sndu_type & 0x0700) >> 8;
 253         unsigned char htype = p->ule_sndu_type & 0x00FF;
 254
 255         /* Discriminate mandatory and optional extension headers. */
 256         if (hlen == 0) {
 257                 /* Mandatory extension header */
 258                 if (ule_mandatory_ext_handlers[htype]) {
 259                         ext_len = ule_mandatory_ext_handlers[htype]( p );
 260                         p->ule_next_hdr += ext_len;
 261                         if (! p->ule_bridged) {
 262                                 p->ule_sndu_type = ntohs( *(unsigned short *)p->ule_next_hdr );
 263                                 p->ule_next_hdr += 2;
 264                         } else {
 265                                 p->ule_sndu_type = ntohs( *(unsigned short *)(p->ule_next_hdr + ((p->ule_dbit ? 2 : 3) * ETH_ALEN)) );
 266                                 /* This assures the extension handling loop will terminate. */
 267                         }
 268                 } else
 269                         ext_len = -1;   /* SNDU has to be discarded. */
 270         } else {
 271                 /* Optional extension header.  Calculate the length. */
 272                 ext_len = hlen << 2;
 273                 /* Process the optional extension header according to its type. */
 274                 if (ule_optional_ext_handlers[htype])
 275                         (void)ule_optional_ext_handlers[htype]( p );
 276                 p->ule_next_hdr += ext_len;
 277                 p->ule_sndu_type = ntohs( *(unsigned short *)p->ule_next_hdr );
 278                 p->ule_next_hdr += 2;
 279         }
 280
 281         return ext_len;
 282 }
 283
 284 static int handle_ule_extensions( struct dvb_net_priv *p )
 285 {
 286         int total_ext_len = 0, l;
 287
 288         p->ule_next_hdr = p->ule_skb->data;
 289         do {
 290                 l = handle_one_ule_extension( p );
 291                 if (l == -1) return -1; /* Stop extension header processing and discard SNDU. */
 292                 total_ext_len += l;
 293
 294         } while (p->ule_sndu_type < 1536);
 295
 296         return total_ext_len;
 297 }
 298
 299
 300 /** Prepare for a new ULE SNDU: reset the decoder state. */
 301 static inline void reset_ule( struct dvb_net_priv *p )
 302 {
 303         p->ule_skb = NULL;
 304         p->ule_next_hdr = NULL;
 305         p->ule_sndu_len = 0;
 306         p->ule_sndu_type = 0;
 307         p->ule_sndu_type_1 = 0;
 308         p->ule_sndu_remain = 0;
 309         p->ule_dbit = 0xFF;
 310         p->ule_bridged = 0;
 311 }
 312
 313 /**
 314  * Decode ULE SNDUs according to draft-ietf-ipdvb-ule-03.txt from a sequence of
 315  * TS cells of a single PID.
 316  */
 317 static void dvb_net_ule( struct net_device *dev, const u8 *buf, size_t buf_len )
 318 {
 319         struct dvb_net_priv *priv = (struct dvb_net_priv *)dev->priv;
 320         unsigned long skipped = 0L;
 321         u8 *ts, *ts_end, *from_where = NULL, ts_remain = 0, how_much = 0, new_ts = 1;
 322         struct ethhdr *ethh = NULL;
 323
 324 #ifdef ULE_DEBUG
 325         /* The code inside ULE_DEBUG keeps a history of the last 100 TS cells processed. */
 326         static unsigned char ule_hist[100*TS_SZ];
 327         static unsigned char *ule_where = ule_hist, ule_dump = 0;
 328 #endif
 329
 330         if (dev == NULL) {
 331                 printk( KERN_ERR "NO netdev struct!\n" );
 332                 return;
 333         }
 334
 335         /* For all TS cells in current buffer.
 336          * Appearently, we are called for every single TS cell.
 337          */
 338         for (ts = (char *)buf, ts_end = (char *)buf + buf_len; ts < ts_end; /* no default incr. */ ) {
 339
 340                 if (new_ts) {
 341                         /* We are about to process a new TS cell. */
 342
 343 #ifdef ULE_DEBUG
 344                         if (ule_where >= &ule_hist[100*TS_SZ]) ule_where = ule_hist;
 345                         memcpy( ule_where, ts, TS_SZ );
 346                         if (ule_dump) {
 347                                 hexdump( ule_where, TS_SZ );
 348                                 ule_dump = 0;
 349                 }
 350                         ule_where += TS_SZ;
 351 #endif
 352
 353                         /* Check TS error conditions: sync_byte, transport_error_indicator, scrambling_control . */
 354                         if ((ts[0] != TS_SYNC) || (ts[1] & TS_TEI) || ((ts[3] & TS_SC) != 0)) {
 355                                 printk(KERN_WARNING "%lu: Invalid TS cell: SYNC %#x, TEI %u, SC %#x.\n",
 356                                        priv->ts_count, ts[0], ts[1] & TS_TEI >> 7, ts[3] & 0xC0 >> 6);
 357
 358                                 /* Drop partly decoded SNDU, reset state, resync on PUSI. */
 359                                 if (priv->ule_skb) {
 360                                         dev_kfree_skb( priv->ule_skb );
 361                                         /* Prepare for next SNDU. */
 362                                         ((struct dvb_net_priv *) dev->priv)->stats.rx_errors++;
 363                                         ((struct dvb_net_priv *) dev->priv)->stats.rx_frame_errors++;
 364                                 }
 365                                 reset_ule(priv);
 366                                 priv->need_pusi = 1;
 367
 368                                 /* Continue with next TS cell. */
 369                                 ts += TS_SZ;
 370                                 priv->ts_count++;
 371                                 continue;
 372                         }
 373
 374                         ts_remain = 184;
 375                         from_where = ts + 4;
 376                 }
 377                 /* Synchronize on PUSI, if required. */
 378                 if (priv->need_pusi) {
 379                         if (ts[1] & TS_PUSI) {
 380                                 /* Find beginning of first ULE SNDU in current TS cell. */
 381                                 /* Synchronize continuity counter. */
 382                                 priv->tscc = ts[3] & 0x0F;
 383                                 /* There is a pointer field here. */
 384                                 if (ts[4] > ts_remain) {
 385                                         printk(KERN_ERR "%lu: Invalid ULE packet "
 386                                                "(pointer field %d)\n", priv->ts_count, ts[4]);
 387                                         ts += TS_SZ;
 388                                         priv->ts_count++;
 389                                         continue;
 390                                 }
 391                                 /* Skip to destination of pointer field. */
 392                                 from_where = &ts[5] + ts[4];
 393                                 ts_remain -= 1 + ts[4];
 394                                 skipped = 0;
 395                         } else {
 396                                 skipped++;
 397                                 ts += TS_SZ;
 398                                 priv->ts_count++;
 399                                 continue;
 400                         }
 401                 }
 402
 403                 /* Check continuity counter. */
 404                 if (new_ts) {
 405                         if ((ts[3] & 0x0F) == priv->tscc)
 406                                 priv->tscc = (priv->tscc + 1) & 0x0F;
 407                         else {
 408                                 /* TS discontinuity handling: */
 409                                 printk(KERN_WARNING "%lu: TS discontinuity: got %#x, "
 410                                        "exptected %#x.\n", priv->ts_count, ts[3] & 0x0F, priv->tscc);
 411                                 /* Drop partly decoded SNDU, reset state, resync on PUSI. */
 412                                 if (priv->ule_skb) {
 413                                         dev_kfree_skb( priv->ule_skb );
 414                                         /* Prepare for next SNDU. */
 415                                         // reset_ule(priv);  moved to below.
 416                                         ((struct dvb_net_priv *) dev->priv)->stats.rx_errors++;
 417                                         ((struct dvb_net_priv *) dev->priv)->stats.rx_frame_errors++;
 418                                 }
 419                                 reset_ule(priv);
 420                                 /* skip to next PUSI. */
 421                                 priv->need_pusi = 1;
 422                                 ts += TS_SZ;
 423                                 priv->ts_count++;
 424                                 continue;
 425                         }
 426                         /* If we still have an incomplete payload, but PUSI is
 427                          * set; some TS cells are missing.
 428                          * This is only possible here, if we missed exactly 16 TS
 429                          * cells (continuity counter wrap). */
 430                         if (ts[1] & TS_PUSI) {
 431                                 if (! priv->need_pusi) {
 432                                         if (*from_where > 181) {
 433                                                 /* Pointer field is invalid.  Drop this TS cell and any started ULE SNDU. */
 434                                                 printk(KERN_WARNING "%lu: Invalid pointer "
 435                                                        "field: %u.\n", priv->ts_count, *from_where);
 436
 437                                                 /* Drop partly decoded SNDU, reset state, resync on PUSI. */
 438                                                 if (priv->ule_skb) {
 439                                                         dev_kfree_skb( priv->ule_skb );
 440                                                         ((struct dvb_net_priv *) dev->priv)->stats.rx_errors++;
 441                                                         ((struct dvb_net_priv *) dev->priv)->stats.rx_frame_errors++;
 442                                                 }
 443                                                 reset_ule(priv);
 444                                                 priv->need_pusi = 1;
 445                                                 ts += TS_SZ;
 446                                                 priv->ts_count++;
 447                                                 continue;
 448                                         }
 449                                         /* Skip pointer field (we're processing a
 450                                          * packed payload). */
 451                                         from_where += 1;
 452                                         ts_remain -= 1;
 453                                 } else
 454                                         priv->need_pusi = 0;
 455
 456                                 if (priv->ule_sndu_remain > 183) {
 457                                         /* Current SNDU lacks more data than there could be available in the
 458                                          * current TS cell. */
 459                                         ((struct dvb_net_priv *) dev->priv)->stats.rx_errors++;
 460                                         ((struct dvb_net_priv *) dev->priv)->stats.rx_length_errors++;
 461                                         printk(KERN_WARNING "%lu: Expected %d more SNDU bytes, but "
 462                                                "got PUSI (pf %d, ts_remain %d).  Flushing incomplete payload.\n",
 463                                                priv->ts_count, priv->ule_sndu_remain, ts[4], ts_remain);
 464                                         dev_kfree_skb(priv->ule_skb);
 465                                         /* Prepare for next SNDU. */
 466                                         reset_ule(priv);
 467                                         /* Resync: go to where pointer field points to: start of next ULE SNDU. */
 468                                         from_where += ts[4];
 469                                         ts_remain -= ts[4];
 470                                 }
 471                         }
 472                 }
 473
 474                 /* Check if new payload needs to be started. */
 475                 if (priv->ule_skb == NULL) {
 476                         /* Start a new payload with skb.
 477                          * Find ULE header.  It is only guaranteed that the
 478                          * length field (2 bytes) is contained in the current
 479                          * TS.
 480                          * Check ts_remain has to be >= 2 here. */
 481                         if (ts_remain < 2) {
 482                                 printk(KERN_WARNING "Invalid payload packing: only %d "
 483                                        "bytes left in TS.  Resyncing.\n", ts_remain);
 484                                 priv->ule_sndu_len = 0;
 485                                 priv->need_pusi = 1;
 486                                 continue;
 487                         }
 488
 489                         if (! priv->ule_sndu_len) {
 490                                 /* Got at least two bytes, thus extrace the SNDU length. */
 491                                 priv->ule_sndu_len = from_where[0] << 8 | from_where[1];
 492                                 if (priv->ule_sndu_len & 0x8000) {
 493                                         /* D-Bit is set: no dest mac present. */
 494                                         priv->ule_sndu_len &= 0x7FFF;
 495                                         priv->ule_dbit = 1;
 496                                 } else
 497                                         priv->ule_dbit = 0;
 498
 499                                 if (priv->ule_sndu_len > 32763) {
 500                                         printk(KERN_WARNING "%lu: Invalid ULE SNDU length %u. "
 501                                                "Resyncing.\n", priv->ts_count, priv->ule_sndu_len);
 502                                         priv->ule_sndu_len = 0;
 503                                         priv->need_pusi = 1;
 504                                         new_ts = 1;
 505                                         ts += TS_SZ;
 506                                         priv->ts_count++;
 507                                         continue;
 508                                 }
 509                                 ts_remain -= 2; /* consume the 2 bytes SNDU length. */
 510                                 from_where += 2;
 511                         }
 512
 513                         /*
 514                          * State of current TS:
 515                          *   ts_remain (remaining bytes in the current TS cell)
 516                          *   0  ule_type is not available now, we need the next TS cell
 517                          *   1  the first byte of the ule_type is present
 518                          * >=2  full ULE header present, maybe some payload data as well.
 519                          */
 520                         switch (ts_remain) {
 521                                 case 1:
 522                                         priv->ule_sndu_type = from_where[0] << 8;
 523                                         priv->ule_sndu_type_1 = 1; /* first byte of ule_type is set. */
 524                                         ts_remain -= 1; from_where += 1;
 525                                         /* Continue w/ next TS. */
 526                                 case 0:
 527                                         new_ts = 1;
 528                                         ts += TS_SZ;
 529                                         priv->ts_count++;
 530                                         continue;
 531
 532                                 default: /* complete ULE header is present in current TS. */
 533                                         /* Extract ULE type field. */
 534                                         if (priv->ule_sndu_type_1) {
 535                                                 priv->ule_sndu_type |= from_where[0];
 536                                                 from_where += 1; /* points to payload start. */
 537                                                 ts_remain -= 1;
 538                                         } else {
 539                                                 /* Complete type is present in new TS. */
 540                                                 priv->ule_sndu_type = from_where[0] << 8 | from_where[1];
 541                                                 from_where += 2; /* points to payload start. */
 542                                                 ts_remain -= 2;
 543                                         }
 544                                         break;
 545                         }
 546
 547                         /* Allocate the skb (decoder target buffer) with the correct size, as follows:
 548                          * prepare for the largest case: bridged SNDU with MAC address (dbit = 0). */
 549                         priv->ule_skb = dev_alloc_skb( priv->ule_sndu_len + ETH_HLEN + ETH_ALEN );
 550                         if (priv->ule_skb == NULL) {
 551                                 printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n",
 552                                        dev->name);
 553                                 ((struct dvb_net_priv *)dev->priv)->stats.rx_dropped++;
 554                                 return;
 555                         }
 556
 557                         /* This includes the CRC32 _and_ dest mac, if !dbit. */
 558                         priv->ule_sndu_remain = priv->ule_sndu_len;
 559                         priv->ule_skb->dev = dev;
 560                         /* Leave space for Ethernet or bridged SNDU header (eth hdr plus one MAC addr). */
 561                         skb_reserve( priv->ule_skb, ETH_HLEN + ETH_ALEN );
 562                 }
 563
 564                 /* Copy data into our current skb. */
 565                 how_much = min(priv->ule_sndu_remain, (int)ts_remain);
 566                 memcpy(skb_put(priv->ule_skb, how_much), from_where, how_much);
 567                 priv->ule_sndu_remain -= how_much;
 568                 ts_remain -= how_much;
 569                 from_where += how_much;
 570
 571                 /* Check for complete payload. */
 572                 if (priv->ule_sndu_remain <= 0) {
 573                         /* Check CRC32, we've got it in our skb already. */
 574                         unsigned short ulen = htons(priv->ule_sndu_len);
 575                         unsigned short utype = htons(priv->ule_sndu_type);
 576                         struct kvec iov[3] = {
 577                                 { &ulen, sizeof ulen },
 578                                 { &utype, sizeof utype },
 579                                 { priv->ule_skb->data, priv->ule_skb->len - 4 }
 580                         };
 581                         unsigned long ule_crc = ~0L, expected_crc;
 582                         if (priv->ule_dbit) {
 583                                 /* Set D-bit for CRC32 verification,
 584                                  * if it was set originally. */
 585                                 ulen |= 0x0080;
 586                         }
 587
 588                         ule_crc = iov_crc32(ule_crc, iov, 3);
 589                         expected_crc = *((u8 *)priv->ule_skb->tail - 4) << 24 |
 590                                 *((u8 *)priv->ule_skb->tail - 3) << 16 |
 591                                 *((u8 *)priv->ule_skb->tail - 2) << 8 |
 592                                 *((u8 *)priv->ule_skb->tail - 1);
 593                         if (ule_crc != expected_crc) {
 594                                 printk(KERN_WARNING "%lu: CRC32 check FAILED: %#lx / %#lx, SNDU len %d type %#x, ts_remain %d, next 2: %x.\n",
 595                                        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);
 596
 597 #ifdef ULE_DEBUG
 598                                 hexdump( iov[0].iov_base, iov[0].iov_len );
 599                                 hexdump( iov[1].iov_base, iov[1].iov_len );
 600                                 hexdump( iov[2].iov_base, iov[2].iov_len );
 601
 602                                 if (ule_where == ule_hist) {
 603                                         hexdump( &ule_hist[98*TS_SZ], TS_SZ );
 604                                         hexdump( &ule_hist[99*TS_SZ], TS_SZ );
 605                                 } else if (ule_where == &ule_hist[TS_SZ]) {
 606                                         hexdump( &ule_hist[99*TS_SZ], TS_SZ );
 607                                         hexdump( ule_hist, TS_SZ );
 608                                 } else {
 609                                         hexdump( ule_where - TS_SZ - TS_SZ, TS_SZ );
 610                                         hexdump( ule_where - TS_SZ, TS_SZ );
 611                                 }
 612                                 ule_dump = 1;
 613 #endif
 614
 615                                 ((struct dvb_net_priv *) dev->priv)->stats.rx_errors++;
 616                                 ((struct dvb_net_priv *) dev->priv)->stats.rx_crc_errors++;
 617                                 dev_kfree_skb(priv->ule_skb);
 618                         } else {
 619                                 /* CRC32 verified OK. */
 620                                 /* Handle ULE Extension Headers. */
 621                                 if (priv->ule_sndu_type < 1536) {
 622                                         /* There is an extension header.  Handle it accordingly. */
 623                                         int l = handle_ule_extensions( priv );
 624                                         if (l < 0) {
 625                                                 /* Mandatory extension header unknown or TEST SNDU.  Drop it. */
 626                                                 // printk( KERN_WARNING "Dropping SNDU, extension headers.\n" );
 627                                                 dev_kfree_skb( priv->ule_skb );
 628                                                 goto sndu_done;
 629                                         }
 630                                         skb_pull( priv->ule_skb, l );
 631                                 }
 632
 633                                 /* CRC32 was OK. Remove it from skb. */
 634                                 priv->ule_skb->tail -= 4;
 635                                 priv->ule_skb->len -= 4;
 636
 637                                 /* Filter on receiver's destination MAC address, if present. */
 638                                 if (!priv->ule_dbit) {
 639                                         /* The destination MAC address is the next data in the skb. */
 640                                         if (memcmp( priv->ule_skb->data, dev->dev_addr, ETH_ALEN )) {
 641                                                 /* MAC addresses don't match.  Drop SNDU. */
 642                                                 // printk( KERN_WARNING "Dropping SNDU, MAC address.\n" );
 643                                                 dev_kfree_skb( priv->ule_skb );
 644                                                 goto sndu_done;
 645                                         }
 646                                         if (! priv->ule_bridged) {
 647                                                 skb_push( priv->ule_skb, ETH_ALEN + 2 );
 648                                                 ethh = (struct ethhdr *)priv->ule_skb->data;
 649                                                 memcpy( ethh->h_dest, ethh->h_source, ETH_ALEN );
 650                                                 memset( ethh->h_source, 0, ETH_ALEN );
 651                                                 ethh->h_proto = htons( priv->ule_sndu_type );
 652                                         } else {
 653                                                 /* Skip the Receiver destination MAC address. */
 654                                                 skb_pull( priv->ule_skb, ETH_ALEN );
 655                                         }
 656                                 } else {
 657                                         if (! priv->ule_bridged) {
 658                                                 skb_push( priv->ule_skb, ETH_HLEN );
 659                                                 ethh = (struct ethhdr *)priv->ule_skb->data;
 660                                                 memcpy( ethh->h_dest, dev->dev_addr, ETH_ALEN );
 661                                                 memset( ethh->h_source, 0, ETH_ALEN );
 662                                                 ethh->h_proto = htons( priv->ule_sndu_type );
 663                                         } else {
 664                                                 /* skb is in correct state; nothing to do. */
 665                                         }
 666                                 }
 667                                 priv->ule_bridged = 0;
 668
 669                                 /* Stuff into kernel's protocol stack. */
 670                                 priv->ule_skb->protocol = dvb_net_eth_type_trans(priv->ule_skb, dev);
 671                                 /* If D-bit is set (i.e. destination MAC address not present),
 672                                  * receive the packet anyhow. */
 673                                 /* if (priv->ule_dbit && skb->pkt_type == PACKET_OTHERHOST)
 674                                         priv->ule_skb->pkt_type = PACKET_HOST; */
 675                                 ((struct dvb_net_priv *) dev->priv)->stats.rx_packets++;
 676                                 ((struct dvb_net_priv *) dev->priv)->stats.rx_bytes += priv->ule_skb->len;
 677                                 netif_rx(priv->ule_skb);
 678                         }
 679                         sndu_done:
 680                         /* Prepare for next SNDU. */
 681                         reset_ule(priv);
 682                 }
 683
 684                 /* More data in current TS (look at the bytes following the CRC32)? */
 685                 if (ts_remain >= 2 && *((unsigned short *)from_where) != 0xFFFF) {
 686                         /* Next ULE SNDU starts right there. */
 687                         new_ts = 0;
 688                         priv->ule_skb = NULL;
 689                         priv->ule_sndu_type_1 = 0;
 690                         priv->ule_sndu_len = 0;
 691                         // printk(KERN_WARNING "More data in current TS: [%#x %#x %#x %#x]\n",
 692                         //      *(from_where + 0), *(from_where + 1),
 693                         //      *(from_where + 2), *(from_where + 3));
 694                         // printk(KERN_WARNING "ts @ %p, stopped @ %p:\n", ts, from_where + 0);
 695                         // hexdump(ts, 188);
 696                 } else {
 697                         new_ts = 1;
 698                         ts += TS_SZ;
 699                         priv->ts_count++;
 700                         if (priv->ule_skb == NULL) {
 701                                 priv->need_pusi = 1;
 702                                 priv->ule_sndu_type_1 = 0;
 703                                 priv->ule_sndu_len = 0;
 704                         }
 705                 }
 706         }       /* for all available TS cells */
 707 }
 708
 709 static int dvb_net_ts_callback(const u8 *buffer1, size_t buffer1_len,
 710                                const u8 *buffer2, size_t buffer2_len,
 711                                struct dmx_ts_feed *feed, enum dmx_success success)
 712 {
 713         struct net_device *dev = (struct net_device *)feed->priv;
 714
 715         if (buffer2 != 0)
 716                 printk(KERN_WARNING "buffer2 not 0: %p.\n", buffer2);
 717         if (buffer1_len > 32768)
 718                 printk(KERN_WARNING "length > 32k: %zu.\n", buffer1_len);
 719         /* printk("TS callback: %u bytes, %u TS cells @ %p.\n",
 720                   buffer1_len, buffer1_len / TS_SZ, buffer1); */
 721         dvb_net_ule(dev, buffer1, buffer1_len);
 722         return 0;
 723 }
 724
 725
 726 static void dvb_net_sec(struct net_device *dev, u8 *pkt, int pkt_len)
 727 {
 728         u8 *eth;
 729         struct sk_buff *skb;
 730         struct net_device_stats *stats = &(((struct dvb_net_priv *) dev->priv)->stats);
 731
 732         /* note: pkt_len includes a 32bit checksum */
 733         if (pkt_len < 16) {
 734                 printk("%s: IP/MPE packet length = %d too small.\n",
 735                         dev->name, pkt_len);
 736                 stats->rx_errors++;
 737                 stats->rx_length_errors++;
 738                 return;
 739         }
 740 /* it seems some ISPs manage to screw up here, so we have to
 741  * relax the error checks... */
 742 #if 0
 743         if ((pkt[5] & 0xfd) != 0xc1) {
 744                 /* drop scrambled or broken packets */
 745 #else
 746         if ((pkt[5] & 0x3c) != 0x00) {
 747                 /* drop scrambled */
 748 #endif
 749                 stats->rx_errors++;
 750                 stats->rx_crc_errors++;
 751                 return;
 752         }
 753         if (pkt[5] & 0x02) {
 754                 //FIXME: handle LLC/SNAP
 755                 stats->rx_dropped++;
 756                 return;
 757         }
 758         if (pkt[7]) {
 759                 /* FIXME: assemble datagram from multiple sections */
 760                 stats->rx_errors++;
 761                 stats->rx_frame_errors++;
 762                 return;
 763         }
 764
 765         /* we have 14 byte ethernet header (ip header follows);
 766          * 12 byte MPE header; 4 byte checksum; + 2 byte alignment
 767          */
 768         if (!(skb = dev_alloc_skb(pkt_len - 4 - 12 + 14 + 2))) {
 769                 //printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n", dev->name);
 770                 stats->rx_dropped++;
 771                 return;
 772         }
 773         skb_reserve(skb, 2);    /* longword align L3 header */
 774         skb->dev = dev;
 775
 776         /* copy L3 payload */
 777         eth = (u8 *) skb_put(skb, pkt_len - 12 - 4 + 14);
 778         memcpy(eth + 14, pkt + 12, pkt_len - 12 - 4);
 779
 780         /* create ethernet header: */
 781         eth[0]=pkt[0x0b];
 782         eth[1]=pkt[0x0a];
 783         eth[2]=pkt[0x09];
 784         eth[3]=pkt[0x08];
 785         eth[4]=pkt[0x04];
 786         eth[5]=pkt[0x03];
 787
 788         eth[6]=eth[7]=eth[8]=eth[9]=eth[10]=eth[11]=0;
 789
 790         eth[12] = 0x08; /* ETH_P_IP */
 791         eth[13] = 0x00;
 792
 793         skb->protocol = dvb_net_eth_type_trans(skb, dev);
 794
 795         stats->rx_packets++;
 796         stats->rx_bytes+=skb->len;
 797         netif_rx(skb);
 798 }
 799
 800 static int dvb_net_sec_callback(const u8 *buffer1, size_t buffer1_len,
 801                  const u8 *buffer2, size_t buffer2_len,
 802                  struct dmx_section_filter *filter,
 803                  enum dmx_success success)
 804 {
 805         struct net_device *dev=(struct net_device *) filter->priv;
 806
 807         /**
 808          * we rely on the DVB API definition where exactly one complete
 809          * section is delivered in buffer1
 810          */
 811         dvb_net_sec (dev, (u8*) buffer1, buffer1_len);
 812         return 0;
 813 }
 814
 815 static int dvb_net_tx(struct sk_buff *skb, struct net_device *dev)
 816 {
 817         dev_kfree_skb(skb);
 818         return 0;
 819 }
 820
 821 static u8 mask_normal[6]={0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
 822 static u8 mask_allmulti[6]={0xff, 0xff, 0xff, 0x00, 0x00, 0x00};
 823 static u8 mac_allmulti[6]={0x01, 0x00, 0x5e, 0x00, 0x00, 0x00};
 824 static u8 mask_promisc[6]={0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
 825
 826 static int dvb_net_filter_sec_set(struct net_device *dev,
 827                    struct dmx_section_filter **secfilter,
 828                    u8 *mac, u8 *mac_mask)
 829 {
 830         struct dvb_net_priv *priv = (struct dvb_net_priv*) dev->priv;
 831         int ret;
 832
 833         *secfilter=NULL;
 834         ret = priv->secfeed->allocate_filter(priv->secfeed, secfilter);
 835         if (ret<0) {
 836                 printk("%s: could not get filter\n", dev->name);
 837                 return ret;
 838         }
 839
 840         (*secfilter)->priv=(void *) dev;
 841
 842         memset((*secfilter)->filter_value, 0x00, DMX_MAX_FILTER_SIZE);
 843         memset((*secfilter)->filter_mask,  0x00, DMX_MAX_FILTER_SIZE);
 844         memset((*secfilter)->filter_mode,  0xff, DMX_MAX_FILTER_SIZE);
 845
 846         (*secfilter)->filter_value[0]=0x3e;
 847         (*secfilter)->filter_value[3]=mac[5];
 848         (*secfilter)->filter_value[4]=mac[4];
 849         (*secfilter)->filter_value[8]=mac[3];
 850         (*secfilter)->filter_value[9]=mac[2];
 851         (*secfilter)->filter_value[10]=mac[1];
 852         (*secfilter)->filter_value[11]=mac[0];
 853
 854         (*secfilter)->filter_mask[0] = 0xff;
 855         (*secfilter)->filter_mask[3] = mac_mask[5];
 856         (*secfilter)->filter_mask[4] = mac_mask[4];
 857         (*secfilter)->filter_mask[8] = mac_mask[3];
 858         (*secfilter)->filter_mask[9] = mac_mask[2];
 859         (*secfilter)->filter_mask[10] = mac_mask[1];
 860         (*secfilter)->filter_mask[11]=mac_mask[0];
 861
 862         dprintk("%s: filter mac=%02x %02x %02x %02x %02x %02x\n",
 863                dev->name, mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
 864         dprintk("%s: filter mask=%02x %02x %02x %02x %02x %02x\n",
 865                dev->name, mac_mask[0], mac_mask[1], mac_mask[2],
 866                mac_mask[3], mac_mask[4], mac_mask[5]);
 867
 868         return 0;
 869 }
 870
 871 static int dvb_net_feed_start(struct net_device *dev)
 872 {
 873         int ret, i;
 874         struct dvb_net_priv *priv = (struct dvb_net_priv*) dev->priv;
 875         struct dmx_demux *demux = priv->demux;
 876         unsigned char *mac = (unsigned char *) dev->dev_addr;
 877
 878         dprintk("%s: rx_mode %i\n", __FUNCTION__, priv->rx_mode);
 879         if (priv->tsfeed || priv->secfeed || priv->secfilter || priv->multi_secfilter[0])
 880                 printk("%s: BUG %d\n", __FUNCTION__, __LINE__);
 881
 882         priv->secfeed=NULL;
 883         priv->secfilter=NULL;
 884         priv->tsfeed = NULL;
 885
 886         if (priv->feedtype == DVB_NET_FEEDTYPE_MPE) {
 887         dprintk("%s: alloc secfeed\n", __FUNCTION__);
 888         ret=demux->allocate_section_feed(demux, &priv->secfeed,
 889                                          dvb_net_sec_callback);
 890         if (ret<0) {
 891                 printk("%s: could not allocate section feed\n", dev->name);
 892                 return ret;
 893         }
 894
 895         ret = priv->secfeed->set(priv->secfeed, priv->pid, 32768, 0, 1);
 896
 897         if (ret<0) {
 898                 printk("%s: could not set section feed\n", dev->name);
 899                 priv->demux->release_section_feed(priv->demux, priv->secfeed);
 900                 priv->secfeed=NULL;
 901                 return ret;
 902         }
 903
 904         if (priv->rx_mode != RX_MODE_PROMISC) {
 905                 dprintk("%s: set secfilter\n", __FUNCTION__);
 906                         dvb_net_filter_sec_set(dev, &priv->secfilter, mac, mask_normal);
 907         }
 908
 909         switch (priv->rx_mode) {
 910         case RX_MODE_MULTI:
 911                 for (i = 0; i < priv->multi_num; i++) {
 912                         dprintk("%s: set multi_secfilter[%d]\n", __FUNCTION__, i);
 913                                 dvb_net_filter_sec_set(dev, &priv->multi_secfilter[i],
 914                                            priv->multi_macs[i], mask_normal);
 915                 }
 916                 break;
 917         case RX_MODE_ALL_MULTI:
 918                 priv->multi_num=1;
 919                 dprintk("%s: set multi_secfilter[0]\n", __FUNCTION__);
 920                         dvb_net_filter_sec_set(dev, &priv->multi_secfilter[0],
 921                                    mac_allmulti, mask_allmulti);
 922                 break;
 923         case RX_MODE_PROMISC:
 924                 priv->multi_num=0;
 925                 dprintk("%s: set secfilter\n", __FUNCTION__);
 926                         dvb_net_filter_sec_set(dev, &priv->secfilter, mac, mask_promisc);
 927                 break;
 928         }
 929
 930         dprintk("%s: start filtering\n", __FUNCTION__);
 931         priv->secfeed->start_filtering(priv->secfeed);
 932         } else if (priv->feedtype == DVB_NET_FEEDTYPE_ULE) {
 933                 struct timespec timeout = { 0, 30000000 }; // 30 msec
 934
 935                 /* we have payloads encapsulated in TS */
 936                 dprintk("%s: alloc tsfeed\n", __FUNCTION__);
 937                 ret = demux->allocate_ts_feed(demux, &priv->tsfeed, dvb_net_ts_callback);
 938                 if (ret < 0) {
 939                         printk("%s: could not allocate ts feed\n", dev->name);
 940                         return ret;
 941                 }
 942
 943                 /* Set netdevice pointer for ts decaps callback. */
 944                 priv->tsfeed->priv = (void *)dev;
 945                 ret = priv->tsfeed->set(priv->tsfeed, priv->pid,
 946                                         TS_PACKET, DMX_TS_PES_OTHER,
 947                                         188 * 100, /* nr. of bytes delivered per callback */
 948                                         32768,     /* circular buffer size */
 949                                         0,         /* descramble */
 950                                         timeout);
 951
 952                 if (ret < 0) {
 953                         printk("%s: could not set ts feed\n", dev->name);
 954                         priv->demux->release_ts_feed(priv->demux, priv->tsfeed);
 955                         priv->tsfeed = NULL;
 956                         return ret;
 957                 }
 958
 959                 dprintk("%s: start filtering\n", __FUNCTION__);
 960                 priv->tsfeed->start_filtering(priv->tsfeed);
 961         } else
 962                 return -EINVAL;
 963
 964         return 0;
 965 }
 966
 967 static int dvb_net_feed_stop(struct net_device *dev)
 968 {
 969         struct dvb_net_priv *priv = (struct dvb_net_priv*) dev->priv;
 970         int i;
 971
 972         dprintk("%s\n", __FUNCTION__);
 973         if (priv->feedtype == DVB_NET_FEEDTYPE_MPE) {
 974         if (priv->secfeed) {
 975                 if (priv->secfeed->is_filtering) {
 976                         dprintk("%s: stop secfeed\n", __FUNCTION__);
 977                         priv->secfeed->stop_filtering(priv->secfeed);
 978                 }
 979
 980                 if (priv->secfilter) {
 981                         dprintk("%s: release secfilter\n", __FUNCTION__);
 982                         priv->secfeed->release_filter(priv->secfeed,
 983                                                priv->secfilter);
 984                 priv->secfilter=NULL;
 985                 }
 986
 987                 for (i=0; i<priv->multi_num; i++) {
 988                         if (priv->multi_secfilter[i]) {
 989                                         dprintk("%s: release multi_filter[%d]\n",
 990                                                 __FUNCTION__, i);
 991                                 priv->secfeed->release_filter(priv->secfeed,
 992                                                        priv->multi_secfilter[i]);
 993                         priv->multi_secfilter[i]=NULL;
 994                 }
 995                 }
 996
 997                 priv->demux->release_section_feed(priv->demux, priv->secfeed);
 998                 priv->secfeed=NULL;
 999         } else
1000                 printk("%s: no feed to stop\n", dev->name);
1001         } else if (priv->feedtype == DVB_NET_FEEDTYPE_ULE) {
1002                 if (priv->tsfeed) {
1003                         if (priv->tsfeed->is_filtering) {
1004                                 dprintk("%s: stop tsfeed\n", __FUNCTION__);
1005                                 priv->tsfeed->stop_filtering(priv->tsfeed);
1006                         }
1007                         priv->demux->release_ts_feed(priv->demux, priv->tsfeed);
1008                         priv->tsfeed = NULL;
1009                 }
1010                 else
1011                         printk("%s: no ts feed to stop\n", dev->name);
1012         } else
1013                 return -EINVAL;
1014         return 0;
1015 }
1016
1017
1018 static int dvb_set_mc_filter (struct net_device *dev, struct dev_mc_list *mc)
1019 {
1020         struct dvb_net_priv *priv = (struct dvb_net_priv*) dev->priv;
1021
1022         if (priv->multi_num == DVB_NET_MULTICAST_MAX)
1023                 return -ENOMEM;
1024
1025         memcpy(priv->multi_macs[priv->multi_num], mc->dmi_addr, 6);
1026
1027         priv->multi_num++;
1028         return 0;
1029 }
1030
1031
1032 static void wq_set_multicast_list (void *data)
1033 {
1034         struct net_device *dev = data;
1035         struct dvb_net_priv *priv = (struct dvb_net_priv*) dev->priv;
1036
1037         dvb_net_feed_stop(dev);
1038
1039         priv->rx_mode = RX_MODE_UNI;
1040
1041         if(dev->flags & IFF_PROMISC) {
1042                 dprintk("%s: promiscuous mode\n", dev->name);
1043                 priv->rx_mode = RX_MODE_PROMISC;
1044         } else if ((dev->flags & IFF_ALLMULTI)) {
1045                 dprintk("%s: allmulti mode\n", dev->name);
1046                 priv->rx_mode = RX_MODE_ALL_MULTI;
1047         } else if (dev->mc_count) {
1048                 int mci;
1049                 struct dev_mc_list *mc;
1050
1051                 dprintk("%s: set_mc_list, %d entries\n",
1052                         dev->name, dev->mc_count);
1053
1054                 priv->rx_mode = RX_MODE_MULTI;
1055                 priv->multi_num = 0;
1056
1057                 for (mci = 0, mc=dev->mc_list;
1058                      mci < dev->mc_count;
1059                      mc = mc->next, mci++) {
1060                         dvb_set_mc_filter(dev, mc);
1061                 }
1062         }
1063
1064                 dvb_net_feed_start(dev);
1065         }
1066
1067
1068 static void dvb_net_set_multicast_list (struct net_device *dev)
1069 {
1070         struct dvb_net_priv *priv = (struct dvb_net_priv*) dev->priv;
1071         schedule_work(&priv->set_multicast_list_wq);
1072 }
1073
1074
1075 static void wq_restart_net_feed (void *data)
1076 {
1077         struct net_device *dev = data;
1078
1079         if (netif_running(dev)) {
1080                 dvb_net_feed_stop(dev);
1081                 dvb_net_feed_start(dev);
1082         }
1083 }
1084
1085
1086 static int dvb_net_set_mac (struct net_device *dev, void *p)
1087 {
1088         struct dvb_net_priv *priv = (struct dvb_net_priv*) dev->priv;
1089         struct sockaddr *addr=p;
1090
1091         memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1092
1093         if (netif_running(dev))
1094                 schedule_work(&priv->restart_net_feed_wq);
1095
1096         return 0;
1097 }
1098
1099
1100 static int dvb_net_open(struct net_device *dev)
1101 {
1102         struct dvb_net_priv *priv = (struct dvb_net_priv*) dev->priv;
1103
1104         priv->in_use++;
1105         dvb_net_feed_start(dev);
1106         return 0;
1107 }
1108
1109
1110 static int dvb_net_stop(struct net_device *dev)
1111 {
1112         struct dvb_net_priv *priv = (struct dvb_net_priv*) dev->priv;
1113
1114         priv->in_use--;
1115         return dvb_net_feed_stop(dev);
1116 }
1117
1118 static struct net_device_stats * dvb_net_get_stats(struct net_device *dev)
1119 {
1120         return &((struct dvb_net_priv*) dev->priv)->stats;
1121 }
1122
1123
1124 static void dvb_net_setup(struct net_device *dev)
1125 {
1126         ether_setup(dev);
1127
1128         dev->open               = dvb_net_open;
1129         dev->stop               = dvb_net_stop;
1130         dev->hard_start_xmit    = dvb_net_tx;
1131         dev->get_stats          = dvb_net_get_stats;
1132         dev->set_multicast_list = dvb_net_set_multicast_list;
1133         dev->set_mac_address    = dvb_net_set_mac;
1134         dev->mtu                = 4096;
1135         dev->mc_count           = 0;
1136         dev->hard_header_cache  = NULL;
1137
1138         dev->flags |= IFF_NOARP;
1139 }
1140
1141 static int get_if(struct dvb_net *dvbnet)
1142 {
1143         int i;
1144
1145         for (i=0; i<DVB_NET_DEVICES_MAX; i++)
1146                 if (!dvbnet->state[i])
1147                         break;
1148
1149         if (i == DVB_NET_DEVICES_MAX)
1150                 return -1;
1151
1152         dvbnet->state[i]=1;
1153         return i;
1154 }
1155
1156 static int dvb_net_add_if(struct dvb_net *dvbnet, u16 pid, u8 feedtype)
1157 {
1158         struct net_device *net;
1159         struct dvb_net_priv *priv;
1160         int result;
1161         int if_num;
1162
1163         if (feedtype != DVB_NET_FEEDTYPE_MPE && feedtype != DVB_NET_FEEDTYPE_ULE)
1164                 return -EINVAL;
1165         if ((if_num = get_if(dvbnet)) < 0)
1166                 return -EINVAL;
1167
1168         net = alloc_netdev(sizeof(struct dvb_net_priv), "dvb",
1169                            dvb_net_setup);
1170         if (!net)
1171                 return -ENOMEM;
1172
1173         sprintf(net->name, "dvb%d_%d", dvbnet->dvbdev->adapter->num, if_num);
1174
1175         net->addr_len           = 6;
1176         memcpy(net->dev_addr, dvbnet->dvbdev->adapter->proposed_mac, 6);
1177
1178         dvbnet->device[if_num] = net;
1179
1180         priv = net->priv;
1181         priv->demux = dvbnet->demux;
1182         priv->pid = pid;
1183         priv->rx_mode = RX_MODE_UNI;
1184         priv->need_pusi = 1;
1185         priv->tscc = 0;
1186         priv->feedtype = feedtype;
1187         reset_ule(priv);
1188
1189         INIT_WORK(&priv->set_multicast_list_wq, wq_set_multicast_list, net);
1190         INIT_WORK(&priv->restart_net_feed_wq, wq_restart_net_feed, net);
1191
1192         net->base_addr = pid;
1193
1194         if ((result = register_netdev(net)) < 0) {
1195                 dvbnet->device[if_num] = NULL;
1196                 free_netdev(net);
1197                 return result;
1198         }
1199
1200         return if_num;
1201 }
1202
1203
1204 static int dvb_net_remove_if(struct dvb_net *dvbnet, unsigned int num)
1205 {
1206         struct net_device *net = dvbnet->device[num];
1207         struct dvb_net_priv *priv;
1208
1209         if (!dvbnet->state[num])
1210                 return -EINVAL;
1211         priv = net->priv;
1212         if (priv->in_use)
1213                 return -EBUSY;
1214
1215         dvb_net_stop(net);
1216         flush_scheduled_work();
1217         unregister_netdev(net);
1218         dvbnet->state[num]=0;
1219         dvbnet->device[num] = NULL;
1220         free_netdev(net);
1221
1222         return 0;
1223 }
1224
1225
1226 static int dvb_net_do_ioctl(struct inode *inode, struct file *file,
1227                   unsigned int cmd, void *parg)
1228 {
1229         struct dvb_device *dvbdev = (struct dvb_device *) file->private_data;
1230         struct dvb_net *dvbnet = (struct dvb_net *) dvbdev->priv;
1231
1232         if (((file->f_flags&O_ACCMODE)==O_RDONLY))
1233                 return -EPERM;
1234
1235         switch (cmd) {
1236         case NET_ADD_IF:
1237         {
1238                 struct dvb_net_if *dvbnetif=(struct dvb_net_if *)parg;
1239                 int result;
1240
1241                 if (!capable(CAP_SYS_ADMIN))
1242                         return -EPERM;
1243
1244                 if (!try_module_get(dvbdev->adapter->module))
1245                         return -EPERM;
1246
1247                 result=dvb_net_add_if(dvbnet, dvbnetif->pid, dvbnetif->feedtype);
1248                 if (result<0) {
1249                         module_put(dvbdev->adapter->module);
1250                         return result;
1251                 }
1252                 dvbnetif->if_num=result;
1253                 break;
1254         }
1255         case NET_GET_IF:
1256         {
1257                 struct net_device *netdev;
1258                 struct dvb_net_priv *priv_data;
1259                 struct dvb_net_if *dvbnetif=(struct dvb_net_if *)parg;
1260
1261                 if (dvbnetif->if_num >= DVB_NET_DEVICES_MAX ||
1262                     !dvbnet->state[dvbnetif->if_num])
1263                         return -EINVAL;
1264
1265                 netdev = dvbnet->device[dvbnetif->if_num];
1266                 priv_data=(struct dvb_net_priv*)netdev->priv;
1267                 dvbnetif->pid=priv_data->pid;
1268                 dvbnetif->feedtype=priv_data->feedtype;
1269                 break;
1270         }
1271         case NET_REMOVE_IF:
1272         {
1273                 int ret;
1274
1275                 if (!capable(CAP_SYS_ADMIN))
1276                         return -EPERM;
1277                 if ((unsigned int) parg >= DVB_NET_DEVICES_MAX)
1278                         return -EINVAL;
1279                 ret = dvb_net_remove_if(dvbnet, (unsigned int) parg);
1280                 if (!ret)
1281                         module_put(dvbdev->adapter->module);
1282                 return ret;
1283         }
1284
1285         /* binary compatiblity cruft */
1286         case __NET_ADD_IF_OLD:
1287         {
1288                 struct __dvb_net_if_old *dvbnetif=(struct __dvb_net_if_old *)parg;
1289                 int result;
1290
1291                 if (!capable(CAP_SYS_ADMIN))
1292                         return -EPERM;
1293
1294                 if (!try_module_get(dvbdev->adapter->module))
1295                         return -EPERM;
1296
1297                 result=dvb_net_add_if(dvbnet, dvbnetif->pid, DVB_NET_FEEDTYPE_MPE);
1298                 if (result<0) {
1299                         module_put(dvbdev->adapter->module);
1300                         return result;
1301                 }
1302                 dvbnetif->if_num=result;
1303                 break;
1304         }
1305         case __NET_GET_IF_OLD:
1306         {
1307                 struct net_device *netdev;
1308                 struct dvb_net_priv *priv_data;
1309                 struct __dvb_net_if_old *dvbnetif=(struct __dvb_net_if_old *)parg;
1310
1311                 if (dvbnetif->if_num >= DVB_NET_DEVICES_MAX ||
1312                     !dvbnet->state[dvbnetif->if_num])
1313                 return -EINVAL;
1314
1315                 netdev = dvbnet->device[dvbnetif->if_num];
1316                 priv_data=(struct dvb_net_priv*)netdev->priv;
1317                 dvbnetif->pid=priv_data->pid;
1318                 break;
1319         }
1320         default:
1321                 return -ENOTTY;
1322         }
1323         return 0;
1324 }
1325
1326 static int dvb_net_ioctl(struct inode *inode, struct file *file,
1327               unsigned int cmd, unsigned long arg)
1328 {
1329         return dvb_usercopy(inode, file, cmd, arg, dvb_net_do_ioctl);
1330 }
1331
1332 static struct file_operations dvb_net_fops = {
1333         .owner = THIS_MODULE,
1334         .ioctl = dvb_net_ioctl,
1335         .open = dvb_generic_open,
1336         .release = dvb_generic_release,
1337 };
1338
1339 static struct dvb_device dvbdev_net = {
1340         .priv = NULL,
1341         .users = 1,
1342         .writers = 1,
1343         .fops = &dvb_net_fops,
1344 };
1345
1346
1347 void dvb_net_release (struct dvb_net *dvbnet)
1348 {
1349         int i;
1350
1351         dvb_unregister_device(dvbnet->dvbdev);
1352
1353         for (i=0; i<DVB_NET_DEVICES_MAX; i++) {
1354                 if (!dvbnet->state[i])
1355                         continue;
1356                 dvb_net_remove_if(dvbnet, i);
1357         }
1358 }
1359 EXPORT_SYMBOL(dvb_net_release);
1360
1361
1362 int dvb_net_init (struct dvb_adapter *adap, struct dvb_net *dvbnet,
1363                   struct dmx_demux *dmx)
1364 {
1365         int i;
1366
1367         dvbnet->demux = dmx;
1368
1369         for (i=0; i<DVB_NET_DEVICES_MAX; i++)
1370                 dvbnet->state[i] = 0;
1371
1372         dvb_register_device (adap, &dvbnet->dvbdev, &dvbdev_net,
1373                              dvbnet, DVB_DEVICE_NET);
1374
1375         return 0;
1376 }
1377 EXPORT_SYMBOL(dvb_net_init);