git.oblomov.eu Git - linux-2.6/blob - drivers/media/dvb/dvb-core/dvb_net.c

   1 /*
   2  * dvb_net.c
   3  *
   4  * Copyright (C) 2001 Convergence integrated media GmbH
   5  *                    Ralph Metzler <ralph@convergence.de>
   6  * Copyright (C) 2002 Ralph Metzler <rjkm@metzlerbros.de>
   7  *
   8  * ULE Decapsulation code:
   9  * Copyright (C) 2003, 2004 gcs - Global Communication & Services GmbH.
  10  *                      and Department of Scientific Computing
  11  *                          Paris Lodron University of Salzburg.
  12  *                          Hilmar Linder <hlinder@cosy.sbg.ac.at>
  13  *                      and Wolfram Stering <wstering@cosy.sbg.ac.at>
  14  *
  15  * ULE Decaps according to RFC 4326.
  16  *
  17  * This program is free software; you can redistribute it and/or
  18  * modify it under the terms of the GNU General Public License
  19  * as published by the Free Software Foundation; either version 2
  20  * of the License, or (at your option) any later version.
  21  *
  22  * This program is distributed in the hope that it will be useful,
  23  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  24  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  25  * GNU General Public License for more details.
  26  *
  27  * You should have received a copy of the GNU General Public License
  28  * along with this program; if not, write to the Free Software
  29  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  30  * Or, point your browser to http://www.gnu.org/copyleft/gpl.html
  31  */
  32
  33 /*
  34  * ULE ChangeLog:
  35  * Feb 2004: hl/ws v1: Implementing draft-fair-ipdvb-ule-01.txt
  36  *
  37  * Dec 2004: hl/ws v2: Implementing draft-ietf-ipdvb-ule-03.txt:
  38  *                       ULE Extension header handling.
  39  *                     Bugreports by Moritz Vieth and Hanno Tersteegen,
  40  *                       Fraunhofer Institute for Open Communication Systems
  41  *                       Competence Center for Advanced Satellite Communications.
  42  *                     Bugfixes and robustness improvements.
  43  *                     Filtering on dest MAC addresses, if present (D-Bit = 0)
  44  *                     ULE_DEBUG compile-time option.
  45  * Apr 2006: cp v3:    Bugfixes and compliency with RFC 4326 (ULE) by
  46  *                       Christian Praehauser <cpraehaus@cosy.sbg.ac.at>,
  47  *                       Paris Lodron University of Salzburg.
  48  */
  49
  50 /*
  51  * FIXME / TODO (dvb_net.c):
  52  *
  53  * Unloading does not work for 2.6.9 kernels: a refcount doesn't go to zero.
  54  *
  55  */
  56
  57 #include <linux/module.h>
  58 #include <linux/kernel.h>
  59 #include <linux/netdevice.h>
  60 #include <linux/etherdevice.h>
  61 #include <linux/dvb/net.h>
  62 #include <linux/uio.h>
  63 #include <asm/uaccess.h>
  64 #include <linux/crc32.h>
  65 #include <linux/mutex.h>
  66
  67 #include "dvb_demux.h"
  68 #include "dvb_net.h"
  69
  70 static int dvb_net_debug;
  71 module_param(dvb_net_debug, int, 0444);
  72 MODULE_PARM_DESC(dvb_net_debug, "enable debug messages");
  73
  74 #define dprintk(x...) do { if (dvb_net_debug) printk(x); } while (0)
  75
  76
  77 static inline __u32 iov_crc32( __u32 c, struct kvec *iov, unsigned int cnt )
  78 {
  79         unsigned int j;
  80         for (j = 0; j < cnt; j++)
  81                 c = crc32_be( c, iov[j].iov_base, iov[j].iov_len );
  82         return c;
  83 }
  84
  85
  86 #define DVB_NET_MULTICAST_MAX 10
  87
  88 #undef ULE_DEBUG
  89
  90 #ifdef ULE_DEBUG
  91
  92 #define MAC_ADDR_PRINTFMT "%.2x:%.2x:%.2x:%.2x:%.2x:%.2x"
  93 #define MAX_ADDR_PRINTFMT_ARGS(macap) (macap)[0],(macap)[1],(macap)[2],(macap)[3],(macap)[4],(macap)[5]
  94
  95 #define isprint(c)      ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || (c >= '0' && c <= '9'))
  96
  97 static void hexdump( const unsigned char *buf, unsigned short len )
  98 {
  99         char str[80], octet[10];
 100         int ofs, i, l;
 101
 102         for (ofs = 0; ofs < len; ofs += 16) {
 103                 sprintf( str, "%03d: ", ofs );
 104
 105                 for (i = 0; i < 16; i++) {
 106                         if ((i + ofs) < len)
 107                                 sprintf( octet, "%02x ", buf[ofs + i] );
 108                         else
 109                                 strcpy( octet, "   " );
 110
 111                         strcat( str, octet );
 112                 }
 113                 strcat( str, "  " );
 114                 l = strlen( str );
 115
 116                 for (i = 0; (i < 16) && ((i + ofs) < len); i++)
 117                         str[l++] = isprint( buf[ofs + i] ) ? buf[ofs + i] : '.';
 118
 119                 str[l] = '\0';
 120                 printk( KERN_WARNING "%s\n", str );
 121         }
 122 }
 123
 124 #endif
 125
 126 struct dvb_net_priv {
 127         int in_use;
 128         struct net_device_stats stats;
 129         u16 pid;
 130         struct net_device *net;
 131         struct dvb_net *host;
 132         struct dmx_demux *demux;
 133         struct dmx_section_feed *secfeed;
 134         struct dmx_section_filter *secfilter;
 135         struct dmx_ts_feed *tsfeed;
 136         int multi_num;
 137         struct dmx_section_filter *multi_secfilter[DVB_NET_MULTICAST_MAX];
 138         unsigned char multi_macs[DVB_NET_MULTICAST_MAX][6];
 139         int rx_mode;
 140 #define RX_MODE_UNI 0
 141 #define RX_MODE_MULTI 1
 142 #define RX_MODE_ALL_MULTI 2
 143 #define RX_MODE_PROMISC 3
 144         struct work_struct set_multicast_list_wq;
 145         struct work_struct restart_net_feed_wq;
 146         unsigned char feedtype;                 /* Either FEED_TYPE_ or FEED_TYPE_ULE */
 147         int need_pusi;                          /* Set to 1, if synchronization on PUSI required. */
 148         unsigned char tscc;                     /* TS continuity counter after sync on PUSI. */
 149         struct sk_buff *ule_skb;                /* ULE SNDU decodes into this buffer. */
 150         unsigned char *ule_next_hdr;            /* Pointer into skb to next ULE extension header. */
 151         unsigned short ule_sndu_len;            /* ULE SNDU length in bytes, w/o D-Bit. */
 152         unsigned short ule_sndu_type;           /* ULE SNDU type field, complete. */
 153         unsigned char ule_sndu_type_1;          /* ULE SNDU type field, if split across 2 TS cells. */
 154         unsigned char ule_dbit;                 /* Whether the DestMAC address present
 155                                                  * or not (bit is set). */
 156         unsigned char ule_bridged;              /* Whether the ULE_BRIDGED extension header was found. */
 157         int ule_sndu_remain;                    /* Nr. of bytes still required for current ULE SNDU. */
 158         unsigned long ts_count;                 /* Current ts cell counter. */
 159         struct mutex mutex;
 160 };
 161
 162
 163 /**
 164  *      Determine the packet's protocol ID. The rule here is that we
 165  *      assume 802.3 if the type field is short enough to be a length.
 166  *      This is normal practice and works for any 'now in use' protocol.
 167  *
 168  *  stolen from eth.c out of the linux kernel, hacked for dvb-device
 169  *  by Michael Holzt <kju@debian.org>
 170  */
 171 static __be16 dvb_net_eth_type_trans(struct sk_buff *skb,
 172                                       struct net_device *dev)
 173 {
 174         struct ethhdr *eth;
 175         unsigned char *rawp;
 176
 177         skb_reset_mac_header(skb);
 178         skb_pull(skb,dev->hard_header_len);
 179         eth = eth_hdr(skb);
 180
 181         if (*eth->h_dest & 1) {
 182                 if(memcmp(eth->h_dest,dev->broadcast, ETH_ALEN)==0)
 183                         skb->pkt_type=PACKET_BROADCAST;
 184                 else
 185                         skb->pkt_type=PACKET_MULTICAST;
 186         }
 187
 188         if (ntohs(eth->h_proto) >= 1536)
 189                 return eth->h_proto;
 190
 191         rawp = skb->data;
 192
 193         /**
 194          *      This is a magic hack to spot IPX packets. Older Novell breaks
 195          *      the protocol design and runs IPX over 802.3 without an 802.2 LLC
 196          *      layer. We look for FFFF which isn't a used 802.2 SSAP/DSAP. This
 197          *      won't work for fault tolerant netware but does for the rest.
 198          */
 199         if (*(unsigned short *)rawp == 0xFFFF)
 200                 return htons(ETH_P_802_3);
 201
 202         /**
 203          *      Real 802.2 LLC
 204          */
 205         return htons(ETH_P_802_2);
 206 }
 207
 208 #define TS_SZ   188
 209 #define TS_SYNC 0x47
 210 #define TS_TEI  0x80
 211 #define TS_SC   0xC0
 212 #define TS_PUSI 0x40
 213 #define TS_AF_A 0x20
 214 #define TS_AF_D 0x10
 215
 216 /* ULE Extension Header handlers. */
 217
 218 #define ULE_TEST        0
 219 #define ULE_BRIDGED     1
 220
 221 #define ULE_OPTEXTHDR_PADDING 0
 222
 223 static int ule_test_sndu( struct dvb_net_priv *p )
 224 {
 225         return -1;
 226 }
 227
 228 static int ule_bridged_sndu( struct dvb_net_priv *p )
 229 {
 230         struct ethhdr *hdr = (struct ethhdr*) p->ule_next_hdr;
 231         if(ntohs(hdr->h_proto) < 1536) {
 232                 int framelen = p->ule_sndu_len - ((p->ule_next_hdr+sizeof(struct ethhdr)) - p->ule_skb->data);
 233                 /* A frame Type < 1536 for a bridged frame, introduces a LLC Length field. */
 234                 if(framelen != ntohs(hdr->h_proto)) {
 235                         return -1;
 236                 }
 237         }
 238         /* Note:
 239          * From RFC4326:
 240          *  "A bridged SNDU is a Mandatory Extension Header of Type 1.
 241          *   It must be the final (or only) extension header specified in the header chain of a SNDU."
 242          * The 'ule_bridged' flag will cause the extension header processing loop to terminate.
 243          */
 244         p->ule_bridged = 1;
 245         return 0;
 246 }
 247
 248 static int ule_exthdr_padding(struct dvb_net_priv *p)
 249 {
 250         return 0;
 251 }
 252
 253 /** Handle ULE extension headers.
 254  *  Function is called after a successful CRC32 verification of an ULE SNDU to complete its decoding.
 255  *  Returns: >= 0: nr. of bytes consumed by next extension header
 256  *           -1:   Mandatory extension header that is not recognized or TEST SNDU; discard.
 257  */
 258 static int handle_one_ule_extension( struct dvb_net_priv *p )
 259 {
 260         /* Table of mandatory extension header handlers.  The header type is the index. */
 261         static int (*ule_mandatory_ext_handlers[255])( struct dvb_net_priv *p ) =
 262                 { [0] = ule_test_sndu, [1] = ule_bridged_sndu, [2] = NULL,  };
 263
 264         /* Table of optional extension header handlers.  The header type is the index. */
 265         static int (*ule_optional_ext_handlers[255])( struct dvb_net_priv *p ) =
 266                 { [0] = ule_exthdr_padding, [1] = NULL, };
 267
 268         int ext_len = 0;
 269         unsigned char hlen = (p->ule_sndu_type & 0x0700) >> 8;
 270         unsigned char htype = p->ule_sndu_type & 0x00FF;
 271
 272         /* Discriminate mandatory and optional extension headers. */
 273         if (hlen == 0) {
 274                 /* Mandatory extension header */
 275                 if (ule_mandatory_ext_handlers[htype]) {
 276                         ext_len = ule_mandatory_ext_handlers[htype]( p );
 277                         if(ext_len >= 0) {
 278                                 p->ule_next_hdr += ext_len;
 279                                 if (!p->ule_bridged) {
 280                                         p->ule_sndu_type = ntohs(*(__be16 *)p->ule_next_hdr);
 281                                         p->ule_next_hdr += 2;
 282                                 } else {
 283                                         p->ule_sndu_type = ntohs(*(__be16 *)(p->ule_next_hdr + ((p->ule_dbit ? 2 : 3) * ETH_ALEN)));
 284                                         /* This assures the extension handling loop will terminate. */
 285                                 }
 286                         }
 287                         // else: extension handler failed or SNDU should be discarded
 288                 } else
 289                         ext_len = -1;   /* SNDU has to be discarded. */
 290         } else {
 291                 /* Optional extension header.  Calculate the length. */
 292                 ext_len = hlen << 1;
 293                 /* Process the optional extension header according to its type. */
 294                 if (ule_optional_ext_handlers[htype])
 295                         (void)ule_optional_ext_handlers[htype]( p );
 296                 p->ule_next_hdr += ext_len;
 297                 p->ule_sndu_type = ntohs( *(__be16 *)(p->ule_next_hdr-2) );
 298                 /*
 299                  * note: the length of the next header type is included in the
 300                  * length of THIS optional extension header
 301                  */
 302         }
 303
 304         return ext_len;
 305 }
 306
 307 static int handle_ule_extensions( struct dvb_net_priv *p )
 308 {
 309         int total_ext_len = 0, l;
 310
 311         p->ule_next_hdr = p->ule_skb->data;
 312         do {
 313                 l = handle_one_ule_extension( p );
 314                 if (l < 0)
 315                         return l;       /* Stop extension header processing and discard SNDU. */
 316                 total_ext_len += l;
 317 #ifdef ULE_DEBUG
 318                 dprintk("handle_ule_extensions: ule_next_hdr=%p, ule_sndu_type=%i, "
 319                         "l=%i, total_ext_len=%i\n", p->ule_next_hdr,
 320                         (int) p->ule_sndu_type, l, total_ext_len);
 321 #endif
 322
 323         } while (p->ule_sndu_type < 1536);
 324
 325         return total_ext_len;
 326 }
 327
 328
 329 /** Prepare for a new ULE SNDU: reset the decoder state. */
 330 static inline void reset_ule( struct dvb_net_priv *p )
 331 {
 332         p->ule_skb = NULL;
 333         p->ule_next_hdr = NULL;
 334         p->ule_sndu_len = 0;
 335         p->ule_sndu_type = 0;
 336         p->ule_sndu_type_1 = 0;
 337         p->ule_sndu_remain = 0;
 338         p->ule_dbit = 0xFF;
 339         p->ule_bridged = 0;
 340 }
 341
 342 /**
 343  * Decode ULE SNDUs according to draft-ietf-ipdvb-ule-03.txt from a sequence of
 344  * TS cells of a single PID.
 345  */
 346 static void dvb_net_ule( struct net_device *dev, const u8 *buf, size_t buf_len )
 347 {
 348         struct dvb_net_priv *priv = netdev_priv(dev);
 349         unsigned long skipped = 0L;
 350         const u8 *ts, *ts_end, *from_where = NULL;
 351         u8 ts_remain = 0, how_much = 0, new_ts = 1;
 352         struct ethhdr *ethh = NULL;
 353
 354 #ifdef ULE_DEBUG
 355         /* The code inside ULE_DEBUG keeps a history of the last 100 TS cells processed. */
 356         static unsigned char ule_hist[100*TS_SZ];
 357         static unsigned char *ule_where = ule_hist, ule_dump;
 358 #endif
 359
 360         /* For all TS cells in current buffer.
 361          * Appearently, we are called for every single TS cell.
 362          */
 363         for (ts = buf, ts_end = buf + buf_len; ts < ts_end; /* no default incr. */ ) {
 364
 365                 if (new_ts) {
 366                         /* We are about to process a new TS cell. */
 367
 368 #ifdef ULE_DEBUG
 369                         if (ule_where >= &ule_hist[100*TS_SZ]) ule_where = ule_hist;
 370                         memcpy( ule_where, ts, TS_SZ );
 371                         if (ule_dump) {
 372                                 hexdump( ule_where, TS_SZ );
 373                                 ule_dump = 0;
 374                         }
 375                         ule_where += TS_SZ;
 376 #endif
 377
 378                         /* Check TS error conditions: sync_byte, transport_error_indicator, scrambling_control . */
 379                         if ((ts[0] != TS_SYNC) || (ts[1] & TS_TEI) || ((ts[3] & TS_SC) != 0)) {
 380                                 printk(KERN_WARNING "%lu: Invalid TS cell: SYNC %#x, TEI %u, SC %#x.\n",
 381                                        priv->ts_count, ts[0], ts[1] & TS_TEI >> 7, ts[3] & 0xC0 >> 6);
 382
 383                                 /* Drop partly decoded SNDU, reset state, resync on PUSI. */
 384                                 if (priv->ule_skb) {
 385                                         dev_kfree_skb( priv->ule_skb );
 386                                         /* Prepare for next SNDU. */
 387                                         priv->stats.rx_errors++;
 388                                         priv->stats.rx_frame_errors++;
 389                                 }
 390                                 reset_ule(priv);
 391                                 priv->need_pusi = 1;
 392
 393                                 /* Continue with next TS cell. */
 394                                 ts += TS_SZ;
 395                                 priv->ts_count++;
 396                                 continue;
 397                         }
 398
 399                         ts_remain = 184;
 400                         from_where = ts + 4;
 401                 }
 402                 /* Synchronize on PUSI, if required. */
 403                 if (priv->need_pusi) {
 404                         if (ts[1] & TS_PUSI) {
 405                                 /* Find beginning of first ULE SNDU in current TS cell. */
 406                                 /* Synchronize continuity counter. */
 407                                 priv->tscc = ts[3] & 0x0F;
 408                                 /* There is a pointer field here. */
 409                                 if (ts[4] > ts_remain) {
 410                                         printk(KERN_ERR "%lu: Invalid ULE packet "
 411                                                "(pointer field %d)\n", priv->ts_count, ts[4]);
 412                                         ts += TS_SZ;
 413                                         priv->ts_count++;
 414                                         continue;
 415                                 }
 416                                 /* Skip to destination of pointer field. */
 417                                 from_where = &ts[5] + ts[4];
 418                                 ts_remain -= 1 + ts[4];
 419                                 skipped = 0;
 420                         } else {
 421                                 skipped++;
 422                                 ts += TS_SZ;
 423                                 priv->ts_count++;
 424                                 continue;
 425                         }
 426                 }
 427
 428                 if (new_ts) {
 429                         /* Check continuity counter. */
 430                         if ((ts[3] & 0x0F) == priv->tscc)
 431                                 priv->tscc = (priv->tscc + 1) & 0x0F;
 432                         else {
 433                                 /* TS discontinuity handling: */
 434                                 printk(KERN_WARNING "%lu: TS discontinuity: got %#x, "
 435                                        "expected %#x.\n", priv->ts_count, ts[3] & 0x0F, priv->tscc);
 436                                 /* Drop partly decoded SNDU, reset state, resync on PUSI. */
 437                                 if (priv->ule_skb) {
 438                                         dev_kfree_skb( priv->ule_skb );
 439                                         /* Prepare for next SNDU. */
 440                                         // reset_ule(priv);  moved to below.
 441                                         priv->stats.rx_errors++;
 442                                         priv->stats.rx_frame_errors++;
 443                                 }
 444                                 reset_ule(priv);
 445                                 /* skip to next PUSI. */
 446                                 priv->need_pusi = 1;
 447                                 continue;
 448                         }
 449                         /* If we still have an incomplete payload, but PUSI is
 450                          * set; some TS cells are missing.
 451                          * This is only possible here, if we missed exactly 16 TS
 452                          * cells (continuity counter wrap). */
 453                         if (ts[1] & TS_PUSI) {
 454                                 if (! priv->need_pusi) {
 455                                         if (!(*from_where < (ts_remain-1)) || *from_where != priv->ule_sndu_remain) {
 456                                                 /* Pointer field is invalid.  Drop this TS cell and any started ULE SNDU. */
 457                                                 printk(KERN_WARNING "%lu: Invalid pointer "
 458                                                        "field: %u.\n", priv->ts_count, *from_where);
 459
 460                                                 /* Drop partly decoded SNDU, reset state, resync on PUSI. */
 461                                                 if (priv->ule_skb) {
 462                                                         dev_kfree_skb( priv->ule_skb );
 463                                                         priv->stats.rx_errors++;
 464                                                         priv->stats.rx_frame_errors++;
 465                                                 }
 466                                                 reset_ule(priv);
 467                                                 priv->need_pusi = 1;
 468                                                 continue;
 469                                         }
 470                                         /* Skip pointer field (we're processing a
 471                                          * packed payload). */
 472                                         from_where += 1;
 473                                         ts_remain -= 1;
 474                                 } else
 475                                         priv->need_pusi = 0;
 476
 477                                 if (priv->ule_sndu_remain > 183) {
 478                                         /* Current SNDU lacks more data than there could be available in the
 479                                          * current TS cell. */
 480                                         priv->stats.rx_errors++;
 481                                         priv->stats.rx_length_errors++;
 482                                         printk(KERN_WARNING "%lu: Expected %d more SNDU bytes, but "
 483                                                "got PUSI (pf %d, ts_remain %d).  Flushing incomplete payload.\n",
 484                                                priv->ts_count, priv->ule_sndu_remain, ts[4], ts_remain);
 485                                         dev_kfree_skb(priv->ule_skb);
 486                                         /* Prepare for next SNDU. */
 487                                         reset_ule(priv);
 488                                         /* Resync: go to where pointer field points to: start of next ULE SNDU. */
 489                                         from_where += ts[4];
 490                                         ts_remain -= ts[4];
 491                                 }
 492                         }
 493                 }
 494
 495                 /* Check if new payload needs to be started. */
 496                 if (priv->ule_skb == NULL) {
 497                         /* Start a new payload with skb.
 498                          * Find ULE header.  It is only guaranteed that the
 499                          * length field (2 bytes) is contained in the current
 500                          * TS.
 501                          * Check ts_remain has to be >= 2 here. */
 502                         if (ts_remain < 2) {
 503                                 printk(KERN_WARNING "Invalid payload packing: only %d "
 504                                        "bytes left in TS.  Resyncing.\n", ts_remain);
 505                                 priv->ule_sndu_len = 0;
 506                                 priv->need_pusi = 1;
 507                                 continue;
 508                         }
 509
 510                         if (! priv->ule_sndu_len) {
 511                                 /* Got at least two bytes, thus extrace the SNDU length. */
 512                                 priv->ule_sndu_len = from_where[0] << 8 | from_where[1];
 513                                 if (priv->ule_sndu_len & 0x8000) {
 514                                         /* D-Bit is set: no dest mac present. */
 515                                         priv->ule_sndu_len &= 0x7FFF;
 516                                         priv->ule_dbit = 1;
 517                                 } else
 518                                         priv->ule_dbit = 0;
 519
 520                                 if (priv->ule_sndu_len < 5) {
 521                                         printk(KERN_WARNING "%lu: Invalid ULE SNDU length %u. "
 522                                                "Resyncing.\n", priv->ts_count, priv->ule_sndu_len);
 523                                         priv->stats.rx_errors++;
 524                                         priv->stats.rx_length_errors++;
 525                                         priv->ule_sndu_len = 0;
 526                                         priv->need_pusi = 1;
 527                                         new_ts = 1;
 528                                         ts += TS_SZ;
 529                                         priv->ts_count++;
 530                                         continue;
 531                                 }
 532                                 ts_remain -= 2; /* consume the 2 bytes SNDU length. */
 533                                 from_where += 2;
 534                         }
 535
 536                         /*
 537                          * State of current TS:
 538                          *   ts_remain (remaining bytes in the current TS cell)
 539                          *   0  ule_type is not available now, we need the next TS cell
 540                          *   1  the first byte of the ule_type is present
 541                          * >=2  full ULE header present, maybe some payload data as well.
 542                          */
 543                         switch (ts_remain) {
 544                                 case 1:
 545                                         priv->ule_sndu_type = from_where[0] << 8;
 546                                         priv->ule_sndu_type_1 = 1; /* first byte of ule_type is set. */
 547                                         ts_remain -= 1; from_where += 1;
 548                                         /* Continue w/ next TS. */
 549                                 case 0:
 550                                         new_ts = 1;
 551                                         ts += TS_SZ;
 552                                         priv->ts_count++;
 553                                         continue;
 554
 555                                 default: /* complete ULE header is present in current TS. */
 556                                         /* Extract ULE type field. */
 557                                         if (priv->ule_sndu_type_1) {
 558                                                 priv->ule_sndu_type |= from_where[0];
 559                                                 from_where += 1; /* points to payload start. */
 560                                                 ts_remain -= 1;
 561                                         } else {
 562                                                 /* Complete type is present in new TS. */
 563                                                 priv->ule_sndu_type = from_where[0] << 8 | from_where[1];
 564                                                 from_where += 2; /* points to payload start. */
 565                                                 ts_remain -= 2;
 566                                         }
 567                                         break;
 568                         }
 569
 570                         /* Allocate the skb (decoder target buffer) with the correct size, as follows:
 571                          * prepare for the largest case: bridged SNDU with MAC address (dbit = 0). */
 572                         priv->ule_skb = dev_alloc_skb( priv->ule_sndu_len + ETH_HLEN + ETH_ALEN );
 573                         if (priv->ule_skb == NULL) {
 574                                 printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n",
 575                                        dev->name);
 576                                 priv->stats.rx_dropped++;
 577                                 return;
 578                         }
 579
 580                         /* This includes the CRC32 _and_ dest mac, if !dbit. */
 581                         priv->ule_sndu_remain = priv->ule_sndu_len;
 582                         priv->ule_skb->dev = dev;
 583                         /* Leave space for Ethernet or bridged SNDU header (eth hdr plus one MAC addr). */
 584                         skb_reserve( priv->ule_skb, ETH_HLEN + ETH_ALEN );
 585                 }
 586
 587                 /* Copy data into our current skb. */
 588                 how_much = min(priv->ule_sndu_remain, (int)ts_remain);
 589                 memcpy(skb_put(priv->ule_skb, how_much), from_where, how_much);
 590                 priv->ule_sndu_remain -= how_much;
 591                 ts_remain -= how_much;
 592                 from_where += how_much;
 593
 594                 /* Check for complete payload. */
 595                 if (priv->ule_sndu_remain <= 0) {
 596                         /* Check CRC32, we've got it in our skb already. */
 597                         __be16 ulen = htons(priv->ule_sndu_len);
 598                         __be16 utype = htons(priv->ule_sndu_type);
 599                         const u8 *tail;
 600                         struct kvec iov[3] = {
 601                                 { &ulen, sizeof ulen },
 602                                 { &utype, sizeof utype },
 603                                 { priv->ule_skb->data, priv->ule_skb->len - 4 }
 604                         };
 605                         u32 ule_crc = ~0L, expected_crc;
 606                         if (priv->ule_dbit) {
 607                                 /* Set D-bit for CRC32 verification,
 608                                  * if it was set originally. */
 609                                 ulen |= htons(0x8000);
 610                         }
 611
 612                         ule_crc = iov_crc32(ule_crc, iov, 3);
 613                         tail = skb_tail_pointer(priv->ule_skb);
 614                         expected_crc = *(tail - 4) << 24 |
 615                                        *(tail - 3) << 16 |
 616                                        *(tail - 2) << 8 |
 617                                        *(tail - 1);
 618                         if (ule_crc != expected_crc) {
 619                                 printk(KERN_WARNING "%lu: CRC32 check FAILED: %08x / %08x, SNDU len %d type %#x, ts_remain %d, next 2: %x.\n",
 620                                        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);
 621
 622 #ifdef ULE_DEBUG
 623                                 hexdump( iov[0].iov_base, iov[0].iov_len );
 624                                 hexdump( iov[1].iov_base, iov[1].iov_len );
 625                                 hexdump( iov[2].iov_base, iov[2].iov_len );
 626
 627                                 if (ule_where == ule_hist) {
 628                                         hexdump( &ule_hist[98*TS_SZ], TS_SZ );
 629                                         hexdump( &ule_hist[99*TS_SZ], TS_SZ );
 630                                 } else if (ule_where == &ule_hist[TS_SZ]) {
 631                                         hexdump( &ule_hist[99*TS_SZ], TS_SZ );
 632                                         hexdump( ule_hist, TS_SZ );
 633                                 } else {
 634                                         hexdump( ule_where - TS_SZ - TS_SZ, TS_SZ );
 635                                         hexdump( ule_where - TS_SZ, TS_SZ );
 636                                 }
 637                                 ule_dump = 1;
 638 #endif
 639
 640                                 priv->stats.rx_errors++;
 641                                 priv->stats.rx_crc_errors++;
 642                                 dev_kfree_skb(priv->ule_skb);
 643                         } else {
 644                                 /* CRC32 verified OK. */
 645                                 u8 dest_addr[ETH_ALEN];
 646                                 static const u8 bc_addr[ETH_ALEN] =
 647                                         { [ 0 ... ETH_ALEN-1] = 0xff };
 648
 649                                 /* CRC32 was OK. Remove it from skb. */
 650                                 priv->ule_skb->tail -= 4;
 651                                 priv->ule_skb->len -= 4;
 652
 653                                 if (!priv->ule_dbit) {
 654                                         /*
 655                                          * The destination MAC address is the
 656                                          * next data in the skb.  It comes
 657                                          * before any extension headers.
 658                                          *
 659                                          * Check if the payload of this SNDU
 660                                          * should be passed up the stack.
 661                                          */
 662                                         register int drop = 0;
 663                                         if (priv->rx_mode != RX_MODE_PROMISC) {
 664                                                 if (priv->ule_skb->data[0] & 0x01) {
 665                                                         /* multicast or broadcast */
 666                                                         if (memcmp(priv->ule_skb->data, bc_addr, ETH_ALEN)) {
 667                                                                 /* multicast */
 668                                                                 if (priv->rx_mode == RX_MODE_MULTI) {
 669                                                                         int i;
 670                                                                         for(i = 0; i < priv->multi_num && memcmp(priv->ule_skb->data, priv->multi_macs[i], ETH_ALEN); i++)
 671                                                                                 ;
 672                                                                         if (i == priv->multi_num)
 673                                                                                 drop = 1;
 674                                                                 } else if (priv->rx_mode != RX_MODE_ALL_MULTI)
 675                                                                         drop = 1; /* no broadcast; */
 676                                                                 /* else: all multicast mode: accept all multicast packets */
 677                                                         }
 678                                                         /* else: broadcast */
 679                                                 }
 680                                                 else if (memcmp(priv->ule_skb->data, dev->dev_addr, ETH_ALEN))
 681                                                         drop = 1;
 682                                                 /* else: destination address matches the MAC address of our receiver device */
 683                                         }
 684                                         /* else: promiscuous mode; pass everything up the stack */
 685
 686                                         if (drop) {
 687 #ifdef ULE_DEBUG
 688                                                 dprintk("Dropping SNDU: MAC destination address does not match: dest addr: "MAC_ADDR_PRINTFMT", dev addr: "MAC_ADDR_PRINTFMT"\n",
 689                                                         MAX_ADDR_PRINTFMT_ARGS(priv->ule_skb->data), MAX_ADDR_PRINTFMT_ARGS(dev->dev_addr));
 690 #endif
 691                                                 dev_kfree_skb(priv->ule_skb);
 692                                                 goto sndu_done;
 693                                         }
 694                                         else
 695                                         {
 696                                                 skb_copy_from_linear_data(priv->ule_skb,
 697                                                               dest_addr,
 698                                                               ETH_ALEN);
 699                                                 skb_pull(priv->ule_skb, ETH_ALEN);
 700                                         }
 701                                 }
 702
 703                                 /* Handle ULE Extension Headers. */
 704                                 if (priv->ule_sndu_type < 1536) {
 705                                         /* There is an extension header.  Handle it accordingly. */
 706                                         int l = handle_ule_extensions(priv);
 707                                         if (l < 0) {
 708                                                 /* Mandatory extension header unknown or TEST SNDU.  Drop it. */
 709                                                 // printk( KERN_WARNING "Dropping SNDU, extension headers.\n" );
 710                                                 dev_kfree_skb(priv->ule_skb);
 711                                                 goto sndu_done;
 712                                         }
 713                                         skb_pull(priv->ule_skb, l);
 714                                 }
 715
 716                                 /*
 717                                  * Construct/assure correct ethernet header.
 718                                  * Note: in bridged mode (priv->ule_bridged !=
 719                                  * 0) we already have the (original) ethernet
 720                                  * header at the start of the payload (after
 721                                  * optional dest. address and any extension
 722                                  * headers).
 723                                  */
 724
 725                                 if (!priv->ule_bridged) {
 726                                         skb_push(priv->ule_skb, ETH_HLEN);
 727                                         ethh = (struct ethhdr *)priv->ule_skb->data;
 728                                         if (!priv->ule_dbit) {
 729                                                  /* dest_addr buffer is only valid if priv->ule_dbit == 0 */
 730                                                 memcpy(ethh->h_dest, dest_addr, ETH_ALEN);
 731                                                 memset(ethh->h_source, 0, ETH_ALEN);
 732                                         }
 733                                         else /* zeroize source and dest */
 734                                                 memset( ethh, 0, ETH_ALEN*2 );
 735
 736                                         ethh->h_proto = htons(priv->ule_sndu_type);
 737                                 }
 738                                 /* else:  skb is in correct state; nothing to do. */
 739                                 priv->ule_bridged = 0;
 740
 741                                 /* Stuff into kernel's protocol stack. */
 742                                 priv->ule_skb->protocol = dvb_net_eth_type_trans(priv->ule_skb, dev);
 743                                 /* If D-bit is set (i.e. destination MAC address not present),
 744                                  * receive the packet anyhow. */
 745                                 /* if (priv->ule_dbit && skb->pkt_type == PACKET_OTHERHOST)
 746                                         priv->ule_skb->pkt_type = PACKET_HOST; */
 747                                 priv->stats.rx_packets++;
 748                                 priv->stats.rx_bytes += priv->ule_skb->len;
 749                                 netif_rx(priv->ule_skb);
 750                         }
 751                         sndu_done:
 752                         /* Prepare for next SNDU. */
 753                         reset_ule(priv);
 754                 }
 755
 756                 /* More data in current TS (look at the bytes following the CRC32)? */
 757                 if (ts_remain >= 2 && *((unsigned short *)from_where) != 0xFFFF) {
 758                         /* Next ULE SNDU starts right there. */
 759                         new_ts = 0;
 760                         priv->ule_skb = NULL;
 761                         priv->ule_sndu_type_1 = 0;
 762                         priv->ule_sndu_len = 0;
 763                         // printk(KERN_WARNING "More data in current TS: [%#x %#x %#x %#x]\n",
 764                         //      *(from_where + 0), *(from_where + 1),
 765                         //      *(from_where + 2), *(from_where + 3));
 766                         // printk(KERN_WARNING "ts @ %p, stopped @ %p:\n", ts, from_where + 0);
 767                         // hexdump(ts, 188);
 768                 } else {
 769                         new_ts = 1;
 770                         ts += TS_SZ;
 771                         priv->ts_count++;
 772                         if (priv->ule_skb == NULL) {
 773                                 priv->need_pusi = 1;
 774                                 priv->ule_sndu_type_1 = 0;
 775                                 priv->ule_sndu_len = 0;
 776                         }
 777                 }
 778         }       /* for all available TS cells */
 779 }
 780
 781 static int dvb_net_ts_callback(const u8 *buffer1, size_t buffer1_len,
 782                                const u8 *buffer2, size_t buffer2_len,
 783                                struct dmx_ts_feed *feed, enum dmx_success success)
 784 {
 785         struct net_device *dev = feed->priv;
 786
 787         if (buffer2)
 788                 printk(KERN_WARNING "buffer2 not NULL: %p.\n", buffer2);
 789         if (buffer1_len > 32768)
 790                 printk(KERN_WARNING "length > 32k: %zu.\n", buffer1_len);
 791         /* printk("TS callback: %u bytes, %u TS cells @ %p.\n",
 792                   buffer1_len, buffer1_len / TS_SZ, buffer1); */
 793         dvb_net_ule(dev, buffer1, buffer1_len);
 794         return 0;
 795 }
 796
 797
 798 static void dvb_net_sec(struct net_device *dev,
 799                         const u8 *pkt, int pkt_len)
 800 {
 801         u8 *eth;
 802         struct sk_buff *skb;
 803         struct net_device_stats *stats =
 804                 &((struct dvb_net_priv *) netdev_priv(dev))->stats;
 805         int snap = 0;
 806
 807         /* note: pkt_len includes a 32bit checksum */
 808         if (pkt_len < 16) {
 809                 printk("%s: IP/MPE packet length = %d too small.\n",
 810                         dev->name, pkt_len);
 811                 stats->rx_errors++;
 812                 stats->rx_length_errors++;
 813                 return;
 814         }
 815 /* it seems some ISPs manage to screw up here, so we have to
 816  * relax the error checks... */
 817 #if 0
 818         if ((pkt[5] & 0xfd) != 0xc1) {
 819                 /* drop scrambled or broken packets */
 820 #else
 821         if ((pkt[5] & 0x3c) != 0x00) {
 822                 /* drop scrambled */
 823 #endif
 824                 stats->rx_errors++;
 825                 stats->rx_crc_errors++;
 826                 return;
 827         }
 828         if (pkt[5] & 0x02) {
 829                 /* handle LLC/SNAP, see rfc-1042 */
 830                 if (pkt_len < 24 || memcmp(&pkt[12], "\xaa\xaa\x03\0\0\0", 6)) {
 831                         stats->rx_dropped++;
 832                         return;
 833                 }
 834                 snap = 8;
 835         }
 836         if (pkt[7]) {
 837                 /* FIXME: assemble datagram from multiple sections */
 838                 stats->rx_errors++;
 839                 stats->rx_frame_errors++;
 840                 return;
 841         }
 842
 843         /* we have 14 byte ethernet header (ip header follows);
 844          * 12 byte MPE header; 4 byte checksum; + 2 byte alignment, 8 byte LLC/SNAP
 845          */
 846         if (!(skb = dev_alloc_skb(pkt_len - 4 - 12 + 14 + 2 - snap))) {
 847                 //printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n", dev->name);
 848                 stats->rx_dropped++;
 849                 return;
 850         }
 851         skb_reserve(skb, 2);    /* longword align L3 header */
 852         skb->dev = dev;
 853
 854         /* copy L3 payload */
 855         eth = (u8 *) skb_put(skb, pkt_len - 12 - 4 + 14 - snap);
 856         memcpy(eth + 14, pkt + 12 + snap, pkt_len - 12 - 4 - snap);
 857
 858         /* create ethernet header: */
 859         eth[0]=pkt[0x0b];
 860         eth[1]=pkt[0x0a];
 861         eth[2]=pkt[0x09];
 862         eth[3]=pkt[0x08];
 863         eth[4]=pkt[0x04];
 864         eth[5]=pkt[0x03];
 865
 866         eth[6]=eth[7]=eth[8]=eth[9]=eth[10]=eth[11]=0;
 867
 868         if (snap) {
 869                 eth[12] = pkt[18];
 870                 eth[13] = pkt[19];
 871         } else {
 872                 /* protocol numbers are from rfc-1700 or
 873                  * http://www.iana.org/assignments/ethernet-numbers
 874                  */
 875                 if (pkt[12] >> 4 == 6) { /* version field from IP header */
 876                         eth[12] = 0x86; /* IPv6 */
 877                         eth[13] = 0xdd;
 878                 } else {
 879                         eth[12] = 0x08; /* IPv4 */
 880                         eth[13] = 0x00;
 881                 }
 882         }
 883
 884         skb->protocol = dvb_net_eth_type_trans(skb, dev);
 885
 886         stats->rx_packets++;
 887         stats->rx_bytes+=skb->len;
 888         netif_rx(skb);
 889 }
 890
 891 static int dvb_net_sec_callback(const u8 *buffer1, size_t buffer1_len,
 892                  const u8 *buffer2, size_t buffer2_len,
 893                  struct dmx_section_filter *filter,
 894                  enum dmx_success success)
 895 {
 896         struct net_device *dev = filter->priv;
 897
 898         /**
 899          * we rely on the DVB API definition where exactly one complete
 900          * section is delivered in buffer1
 901          */
 902         dvb_net_sec (dev, buffer1, buffer1_len);
 903         return 0;
 904 }
 905
 906 static int dvb_net_tx(struct sk_buff *skb, struct net_device *dev)
 907 {
 908         dev_kfree_skb(skb);
 909         return 0;
 910 }
 911
 912 static u8 mask_normal[6]={0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
 913 static u8 mask_allmulti[6]={0xff, 0xff, 0xff, 0x00, 0x00, 0x00};
 914 static u8 mac_allmulti[6]={0x01, 0x00, 0x5e, 0x00, 0x00, 0x00};
 915 static u8 mask_promisc[6]={0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
 916
 917 static int dvb_net_filter_sec_set(struct net_device *dev,
 918                    struct dmx_section_filter **secfilter,
 919                    u8 *mac, u8 *mac_mask)
 920 {
 921         struct dvb_net_priv *priv = netdev_priv(dev);
 922         int ret;
 923
 924         *secfilter=NULL;
 925         ret = priv->secfeed->allocate_filter(priv->secfeed, secfilter);
 926         if (ret<0) {
 927                 printk("%s: could not get filter\n", dev->name);
 928                 return ret;
 929         }
 930
 931         (*secfilter)->priv=(void *) dev;
 932
 933         memset((*secfilter)->filter_value, 0x00, DMX_MAX_FILTER_SIZE);
 934         memset((*secfilter)->filter_mask,  0x00, DMX_MAX_FILTER_SIZE);
 935         memset((*secfilter)->filter_mode,  0xff, DMX_MAX_FILTER_SIZE);
 936
 937         (*secfilter)->filter_value[0]=0x3e;
 938         (*secfilter)->filter_value[3]=mac[5];
 939         (*secfilter)->filter_value[4]=mac[4];
 940         (*secfilter)->filter_value[8]=mac[3];
 941         (*secfilter)->filter_value[9]=mac[2];
 942         (*secfilter)->filter_value[10]=mac[1];
 943         (*secfilter)->filter_value[11]=mac[0];
 944
 945         (*secfilter)->filter_mask[0] = 0xff;
 946         (*secfilter)->filter_mask[3] = mac_mask[5];
 947         (*secfilter)->filter_mask[4] = mac_mask[4];
 948         (*secfilter)->filter_mask[8] = mac_mask[3];
 949         (*secfilter)->filter_mask[9] = mac_mask[2];
 950         (*secfilter)->filter_mask[10] = mac_mask[1];
 951         (*secfilter)->filter_mask[11]=mac_mask[0];
 952
 953         dprintk("%s: filter mac=%02x %02x %02x %02x %02x %02x\n",
 954                dev->name, mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
 955         dprintk("%s: filter mask=%02x %02x %02x %02x %02x %02x\n",
 956                dev->name, mac_mask[0], mac_mask[1], mac_mask[2],
 957                mac_mask[3], mac_mask[4], mac_mask[5]);
 958
 959         return 0;
 960 }
 961
 962 static int dvb_net_feed_start(struct net_device *dev)
 963 {
 964         int ret = 0, i;
 965         struct dvb_net_priv *priv = netdev_priv(dev);
 966         struct dmx_demux *demux = priv->demux;
 967         unsigned char *mac = (unsigned char *) dev->dev_addr;
 968
 969         dprintk("%s: rx_mode %i\n", __func__, priv->rx_mode);
 970         mutex_lock(&priv->mutex);
 971         if (priv->tsfeed || priv->secfeed || priv->secfilter || priv->multi_secfilter[0])
 972                 printk("%s: BUG %d\n", __func__, __LINE__);
 973
 974         priv->secfeed=NULL;
 975         priv->secfilter=NULL;
 976         priv->tsfeed = NULL;
 977
 978         if (priv->feedtype == DVB_NET_FEEDTYPE_MPE) {
 979                 dprintk("%s: alloc secfeed\n", __func__);
 980                 ret=demux->allocate_section_feed(demux, &priv->secfeed,
 981                                          dvb_net_sec_callback);
 982                 if (ret<0) {
 983                         printk("%s: could not allocate section feed\n", dev->name);
 984                         goto error;
 985                 }
 986
 987                 ret = priv->secfeed->set(priv->secfeed, priv->pid, 32768, 1);
 988
 989                 if (ret<0) {
 990                         printk("%s: could not set section feed\n", dev->name);
 991                         priv->demux->release_section_feed(priv->demux, priv->secfeed);
 992                         priv->secfeed=NULL;
 993                         goto error;
 994                 }
 995
 996                 if (priv->rx_mode != RX_MODE_PROMISC) {
 997                         dprintk("%s: set secfilter\n", __func__);
 998                         dvb_net_filter_sec_set(dev, &priv->secfilter, mac, mask_normal);
 999                 }
1000
1001                 switch (priv->rx_mode) {
1002                 case RX_MODE_MULTI:
1003                         for (i = 0; i < priv->multi_num; i++) {
1004                                 dprintk("%s: set multi_secfilter[%d]\n", __func__, i);
1005                                 dvb_net_filter_sec_set(dev, &priv->multi_secfilter[i],
1006                                                        priv->multi_macs[i], mask_normal);
1007                         }
1008                         break;
1009                 case RX_MODE_ALL_MULTI:
1010                         priv->multi_num=1;
1011                         dprintk("%s: set multi_secfilter[0]\n", __func__);
1012                         dvb_net_filter_sec_set(dev, &priv->multi_secfilter[0],
1013                                                mac_allmulti, mask_allmulti);
1014                         break;
1015                 case RX_MODE_PROMISC:
1016                         priv->multi_num=0;
1017                         dprintk("%s: set secfilter\n", __func__);
1018                         dvb_net_filter_sec_set(dev, &priv->secfilter, mac, mask_promisc);
1019                         break;
1020                 }
1021
1022                 dprintk("%s: start filtering\n", __func__);
1023                 priv->secfeed->start_filtering(priv->secfeed);
1024         } else if (priv->feedtype == DVB_NET_FEEDTYPE_ULE) {
1025                 struct timespec timeout = { 0, 10000000 }; // 10 msec
1026
1027                 /* we have payloads encapsulated in TS */
1028                 dprintk("%s: alloc tsfeed\n", __func__);
1029                 ret = demux->allocate_ts_feed(demux, &priv->tsfeed, dvb_net_ts_callback);
1030                 if (ret < 0) {
1031                         printk("%s: could not allocate ts feed\n", dev->name);
1032                         goto error;
1033                 }
1034
1035                 /* Set netdevice pointer for ts decaps callback. */
1036                 priv->tsfeed->priv = (void *)dev;
1037                 ret = priv->tsfeed->set(priv->tsfeed,
1038                                         priv->pid, /* pid */
1039                                         TS_PACKET, /* type */
1040                                         DMX_TS_PES_OTHER, /* pes type */
1041                                         32768,     /* circular buffer size */
1042                                         timeout    /* timeout */
1043                                         );
1044
1045                 if (ret < 0) {
1046                         printk("%s: could not set ts feed\n", dev->name);
1047                         priv->demux->release_ts_feed(priv->demux, priv->tsfeed);
1048                         priv->tsfeed = NULL;
1049                         goto error;
1050                 }
1051
1052                 dprintk("%s: start filtering\n", __func__);
1053                 priv->tsfeed->start_filtering(priv->tsfeed);
1054         } else
1055                 ret = -EINVAL;
1056
1057 error:
1058         mutex_unlock(&priv->mutex);
1059         return ret;
1060 }
1061
1062 static int dvb_net_feed_stop(struct net_device *dev)
1063 {
1064         struct dvb_net_priv *priv = netdev_priv(dev);
1065         int i, ret = 0;
1066
1067         dprintk("%s\n", __func__);
1068         mutex_lock(&priv->mutex);
1069         if (priv->feedtype == DVB_NET_FEEDTYPE_MPE) {
1070                 if (priv->secfeed) {
1071                         if (priv->secfeed->is_filtering) {
1072                                 dprintk("%s: stop secfeed\n", __func__);
1073                                 priv->secfeed->stop_filtering(priv->secfeed);
1074                         }
1075
1076                         if (priv->secfilter) {
1077                                 dprintk("%s: release secfilter\n", __func__);
1078                                 priv->secfeed->release_filter(priv->secfeed,
1079                                                               priv->secfilter);
1080                                 priv->secfilter=NULL;
1081                         }
1082
1083                         for (i=0; i<priv->multi_num; i++) {
1084                                 if (priv->multi_secfilter[i]) {
1085                                         dprintk("%s: release multi_filter[%d]\n",
1086                                                 __func__, i);
1087                                         priv->secfeed->release_filter(priv->secfeed,
1088                                                                       priv->multi_secfilter[i]);
1089                                         priv->multi_secfilter[i] = NULL;
1090                                 }
1091                         }
1092
1093                         priv->demux->release_section_feed(priv->demux, priv->secfeed);
1094                         priv->secfeed = NULL;
1095                 } else
1096                         printk("%s: no feed to stop\n", dev->name);
1097         } else if (priv->feedtype == DVB_NET_FEEDTYPE_ULE) {
1098                 if (priv->tsfeed) {
1099                         if (priv->tsfeed->is_filtering) {
1100                                 dprintk("%s: stop tsfeed\n", __func__);
1101                                 priv->tsfeed->stop_filtering(priv->tsfeed);
1102                         }
1103                         priv->demux->release_ts_feed(priv->demux, priv->tsfeed);
1104                         priv->tsfeed = NULL;
1105                 }
1106                 else
1107                         printk("%s: no ts feed to stop\n", dev->name);
1108         } else
1109                 ret = -EINVAL;
1110         mutex_unlock(&priv->mutex);
1111         return ret;
1112 }
1113
1114
1115 static int dvb_set_mc_filter (struct net_device *dev, struct dev_mc_list *mc)
1116 {
1117         struct dvb_net_priv *priv = netdev_priv(dev);
1118
1119         if (priv->multi_num == DVB_NET_MULTICAST_MAX)
1120                 return -ENOMEM;
1121
1122         memcpy(priv->multi_macs[priv->multi_num], mc->dmi_addr, 6);
1123
1124         priv->multi_num++;
1125         return 0;
1126 }
1127
1128
1129 static void wq_set_multicast_list (struct work_struct *work)
1130 {
1131         struct dvb_net_priv *priv =
1132                 container_of(work, struct dvb_net_priv, set_multicast_list_wq);
1133         struct net_device *dev = priv->net;
1134
1135         dvb_net_feed_stop(dev);
1136         priv->rx_mode = RX_MODE_UNI;
1137         netif_addr_lock_bh(dev);
1138
1139         if (dev->flags & IFF_PROMISC) {
1140                 dprintk("%s: promiscuous mode\n", dev->name);
1141                 priv->rx_mode = RX_MODE_PROMISC;
1142         } else if ((dev->flags & IFF_ALLMULTI)) {
1143                 dprintk("%s: allmulti mode\n", dev->name);
1144                 priv->rx_mode = RX_MODE_ALL_MULTI;
1145         } else if (dev->mc_count) {
1146                 int mci;
1147                 struct dev_mc_list *mc;
1148
1149                 dprintk("%s: set_mc_list, %d entries\n",
1150                         dev->name, dev->mc_count);
1151
1152                 priv->rx_mode = RX_MODE_MULTI;
1153                 priv->multi_num = 0;
1154
1155                 for (mci = 0, mc=dev->mc_list;
1156                      mci < dev->mc_count;
1157                      mc = mc->next, mci++) {
1158                         dvb_set_mc_filter(dev, mc);
1159                 }
1160         }
1161
1162         netif_addr_unlock_bh(dev);
1163         dvb_net_feed_start(dev);
1164 }
1165
1166
1167 static void dvb_net_set_multicast_list (struct net_device *dev)
1168 {
1169         struct dvb_net_priv *priv = netdev_priv(dev);
1170         schedule_work(&priv->set_multicast_list_wq);
1171 }
1172
1173
1174 static void wq_restart_net_feed (struct work_struct *work)
1175 {
1176         struct dvb_net_priv *priv =
1177                 container_of(work, struct dvb_net_priv, restart_net_feed_wq);
1178         struct net_device *dev = priv->net;
1179
1180         if (netif_running(dev)) {
1181                 dvb_net_feed_stop(dev);
1182                 dvb_net_feed_start(dev);
1183         }
1184 }
1185
1186
1187 static int dvb_net_set_mac (struct net_device *dev, void *p)
1188 {
1189         struct dvb_net_priv *priv = netdev_priv(dev);
1190         struct sockaddr *addr=p;
1191
1192         memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1193
1194         if (netif_running(dev))
1195                 schedule_work(&priv->restart_net_feed_wq);
1196
1197         return 0;
1198 }
1199
1200
1201 static int dvb_net_open(struct net_device *dev)
1202 {
1203         struct dvb_net_priv *priv = netdev_priv(dev);
1204
1205         priv->in_use++;
1206         dvb_net_feed_start(dev);
1207         return 0;
1208 }
1209
1210
1211 static int dvb_net_stop(struct net_device *dev)
1212 {
1213         struct dvb_net_priv *priv = netdev_priv(dev);
1214
1215         priv->in_use--;
1216         return dvb_net_feed_stop(dev);
1217 }
1218
1219 static struct net_device_stats * dvb_net_get_stats(struct net_device *dev)
1220 {
1221         return &((struct dvb_net_priv *) netdev_priv(dev))->stats;
1222 }
1223
1224 static const struct header_ops dvb_header_ops = {
1225         .create         = eth_header,
1226         .parse          = eth_header_parse,
1227         .rebuild        = eth_rebuild_header,
1228 };
1229
1230 static void dvb_net_setup(struct net_device *dev)
1231 {
1232         ether_setup(dev);
1233
1234         dev->header_ops         = &dvb_header_ops;
1235         dev->open               = dvb_net_open;
1236         dev->stop               = dvb_net_stop;
1237         dev->hard_start_xmit    = dvb_net_tx;
1238         dev->get_stats          = dvb_net_get_stats;
1239         dev->set_multicast_list = dvb_net_set_multicast_list;
1240         dev->set_mac_address    = dvb_net_set_mac;
1241         dev->mtu                = 4096;
1242         dev->mc_count           = 0;
1243
1244         dev->flags |= IFF_NOARP;
1245 }
1246
1247 static int get_if(struct dvb_net *dvbnet)
1248 {
1249         int i;
1250
1251         for (i=0; i<DVB_NET_DEVICES_MAX; i++)
1252                 if (!dvbnet->state[i])
1253                         break;
1254
1255         if (i == DVB_NET_DEVICES_MAX)
1256                 return -1;
1257
1258         dvbnet->state[i]=1;
1259         return i;
1260 }
1261
1262 static int dvb_net_add_if(struct dvb_net *dvbnet, u16 pid, u8 feedtype)
1263 {
1264         struct net_device *net;
1265         struct dvb_net_priv *priv;
1266         int result;
1267         int if_num;
1268
1269         if (feedtype != DVB_NET_FEEDTYPE_MPE && feedtype != DVB_NET_FEEDTYPE_ULE)
1270                 return -EINVAL;
1271         if ((if_num = get_if(dvbnet)) < 0)
1272                 return -EINVAL;
1273
1274         net = alloc_netdev(sizeof(struct dvb_net_priv), "dvb", dvb_net_setup);
1275         if (!net)
1276                 return -ENOMEM;
1277
1278         if (dvbnet->dvbdev->id)
1279                 snprintf(net->name, IFNAMSIZ, "dvb%d%u%d",
1280                          dvbnet->dvbdev->adapter->num, dvbnet->dvbdev->id, if_num);
1281         else
1282                 /* compatibility fix to keep dvb0_0 format */
1283                 snprintf(net->name, IFNAMSIZ, "dvb%d_%d",
1284                          dvbnet->dvbdev->adapter->num, if_num);
1285
1286         net->addr_len = 6;
1287         memcpy(net->dev_addr, dvbnet->dvbdev->adapter->proposed_mac, 6);
1288
1289         dvbnet->device[if_num] = net;
1290
1291         priv = netdev_priv(net);
1292         priv->net = net;
1293         priv->demux = dvbnet->demux;
1294         priv->pid = pid;
1295         priv->rx_mode = RX_MODE_UNI;
1296         priv->need_pusi = 1;
1297         priv->tscc = 0;
1298         priv->feedtype = feedtype;
1299         reset_ule(priv);
1300
1301         INIT_WORK(&priv->set_multicast_list_wq, wq_set_multicast_list);
1302         INIT_WORK(&priv->restart_net_feed_wq, wq_restart_net_feed);
1303         mutex_init(&priv->mutex);
1304
1305         net->base_addr = pid;
1306
1307         if ((result = register_netdev(net)) < 0) {
1308                 dvbnet->device[if_num] = NULL;
1309                 free_netdev(net);
1310                 return result;
1311         }
1312         printk("dvb_net: created network interface %s\n", net->name);
1313
1314         return if_num;
1315 }
1316
1317 static int dvb_net_remove_if(struct dvb_net *dvbnet, unsigned long num)
1318 {
1319         struct net_device *net = dvbnet->device[num];
1320         struct dvb_net_priv *priv;
1321
1322         if (!dvbnet->state[num])
1323                 return -EINVAL;
1324         priv = netdev_priv(net);
1325         if (priv->in_use)
1326                 return -EBUSY;
1327
1328         dvb_net_stop(net);
1329         flush_scheduled_work();
1330         printk("dvb_net: removed network interface %s\n", net->name);
1331         unregister_netdev(net);
1332         dvbnet->state[num]=0;
1333         dvbnet->device[num] = NULL;
1334         free_netdev(net);
1335
1336         return 0;
1337 }
1338
1339 static int dvb_net_do_ioctl(struct inode *inode, struct file *file,
1340                   unsigned int cmd, void *parg)
1341 {
1342         struct dvb_device *dvbdev = file->private_data;
1343         struct dvb_net *dvbnet = dvbdev->priv;
1344
1345         if (((file->f_flags&O_ACCMODE)==O_RDONLY))
1346                 return -EPERM;
1347
1348         switch (cmd) {
1349         case NET_ADD_IF:
1350         {
1351                 struct dvb_net_if *dvbnetif = parg;
1352                 int result;
1353
1354                 if (!capable(CAP_SYS_ADMIN))
1355                         return -EPERM;
1356
1357                 if (!try_module_get(dvbdev->adapter->module))
1358                         return -EPERM;
1359
1360                 result=dvb_net_add_if(dvbnet, dvbnetif->pid, dvbnetif->feedtype);
1361                 if (result<0) {
1362                         module_put(dvbdev->adapter->module);
1363                         return result;
1364                 }
1365                 dvbnetif->if_num=result;
1366                 break;
1367         }
1368         case NET_GET_IF:
1369         {
1370                 struct net_device *netdev;
1371                 struct dvb_net_priv *priv_data;
1372                 struct dvb_net_if *dvbnetif = parg;
1373
1374                 if (dvbnetif->if_num >= DVB_NET_DEVICES_MAX ||
1375                     !dvbnet->state[dvbnetif->if_num])
1376                         return -EINVAL;
1377
1378                 netdev = dvbnet->device[dvbnetif->if_num];
1379
1380                 priv_data = netdev_priv(netdev);
1381                 dvbnetif->pid=priv_data->pid;
1382                 dvbnetif->feedtype=priv_data->feedtype;
1383                 break;
1384         }
1385         case NET_REMOVE_IF:
1386         {
1387                 int ret;
1388
1389                 if (!capable(CAP_SYS_ADMIN))
1390                         return -EPERM;
1391                 if ((unsigned long) parg >= DVB_NET_DEVICES_MAX)
1392                         return -EINVAL;
1393                 ret = dvb_net_remove_if(dvbnet, (unsigned long) parg);
1394                 if (!ret)
1395                         module_put(dvbdev->adapter->module);
1396                 return ret;
1397         }
1398
1399         /* binary compatiblity cruft */
1400         case __NET_ADD_IF_OLD:
1401         {
1402                 struct __dvb_net_if_old *dvbnetif = parg;
1403                 int result;
1404
1405                 if (!capable(CAP_SYS_ADMIN))
1406                         return -EPERM;
1407
1408                 if (!try_module_get(dvbdev->adapter->module))
1409                         return -EPERM;
1410
1411                 result=dvb_net_add_if(dvbnet, dvbnetif->pid, DVB_NET_FEEDTYPE_MPE);
1412                 if (result<0) {
1413                         module_put(dvbdev->adapter->module);
1414                         return result;
1415                 }
1416                 dvbnetif->if_num=result;
1417                 break;
1418         }
1419         case __NET_GET_IF_OLD:
1420         {
1421                 struct net_device *netdev;
1422                 struct dvb_net_priv *priv_data;
1423                 struct __dvb_net_if_old *dvbnetif = parg;
1424
1425                 if (dvbnetif->if_num >= DVB_NET_DEVICES_MAX ||
1426                     !dvbnet->state[dvbnetif->if_num])
1427                         return -EINVAL;
1428
1429                 netdev = dvbnet->device[dvbnetif->if_num];
1430
1431                 priv_data = netdev_priv(netdev);
1432                 dvbnetif->pid=priv_data->pid;
1433                 break;
1434         }
1435         default:
1436                 return -ENOTTY;
1437         }
1438         return 0;
1439 }
1440
1441 static int dvb_net_ioctl(struct inode *inode, struct file *file,
1442               unsigned int cmd, unsigned long arg)
1443 {
1444         return dvb_usercopy(inode, file, cmd, arg, dvb_net_do_ioctl);
1445 }
1446
1447 static int dvb_net_close(struct inode *inode, struct file *file)
1448 {
1449         struct dvb_device *dvbdev = file->private_data;
1450         struct dvb_net *dvbnet = dvbdev->priv;
1451
1452         dvb_generic_release(inode, file);
1453
1454         if(dvbdev->users == 1 && dvbnet->exit == 1) {
1455                 fops_put(file->f_op);
1456                 file->f_op = NULL;
1457                 wake_up(&dvbdev->wait_queue);
1458         }
1459         return 0;
1460 }
1461
1462
1463 static struct file_operations dvb_net_fops = {
1464         .owner = THIS_MODULE,
1465         .ioctl = dvb_net_ioctl,
1466         .open = dvb_generic_open,
1467         .release = dvb_net_close,
1468 };
1469
1470 static struct dvb_device dvbdev_net = {
1471         .priv = NULL,
1472         .users = 1,
1473         .writers = 1,
1474         .fops = &dvb_net_fops,
1475 };
1476
1477
1478 void dvb_net_release (struct dvb_net *dvbnet)
1479 {
1480         int i;
1481
1482         dvbnet->exit = 1;
1483         if (dvbnet->dvbdev->users < 1)
1484                 wait_event(dvbnet->dvbdev->wait_queue,
1485                                 dvbnet->dvbdev->users==1);
1486
1487         dvb_unregister_device(dvbnet->dvbdev);
1488
1489         for (i=0; i<DVB_NET_DEVICES_MAX; i++) {
1490                 if (!dvbnet->state[i])
1491                         continue;
1492                 dvb_net_remove_if(dvbnet, i);
1493         }
1494 }
1495 EXPORT_SYMBOL(dvb_net_release);
1496
1497
1498 int dvb_net_init (struct dvb_adapter *adap, struct dvb_net *dvbnet,
1499                   struct dmx_demux *dmx)
1500 {
1501         int i;
1502
1503         dvbnet->demux = dmx;
1504
1505         for (i=0; i<DVB_NET_DEVICES_MAX; i++)
1506                 dvbnet->state[i] = 0;
1507
1508         dvb_register_device (adap, &dvbnet->dvbdev, &dvbdev_net,
1509                              dvbnet, DVB_DEVICE_NET);
1510
1511         return 0;
1512 }
1513 EXPORT_SYMBOL(dvb_net_init);