drivers/media/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 #include <linux/sched.h>
  67
  68 #include "dvb_demux.h"
  69 #include "dvb_net.h"
  70
  71 static int dvb_net_debug;
  72 module_param(dvb_net_debug, int, 0444);
  73 MODULE_PARM_DESC(dvb_net_debug, "enable debug messages");
  74
  75 #define dprintk(x...) do { if (dvb_net_debug) printk(x); } while (0)
  76
  77
  78 static inline __u32 iov_crc32( __u32 c, struct kvec *iov, unsigned int cnt )
  79 {
  80         unsigned int j;
  81         for (j = 0; j < cnt; j++)
  82                 c = crc32_be( c, iov[j].iov_base, iov[j].iov_len );
  83         return c;
  84 }
  85
  86
  87 #define DVB_NET_MULTICAST_MAX 10
  88
  89 #undef ULE_DEBUG
  90
  91 #ifdef ULE_DEBUG
  92
  93 #define MAC_ADDR_PRINTFMT "%.2x:%.2x:%.2x:%.2x:%.2x:%.2x"
  94 #define MAX_ADDR_PRINTFMT_ARGS(macap) (macap)[0],(macap)[1],(macap)[2],(macap)[3],(macap)[4],(macap)[5]
  95
  96 #define isprint(c)      ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || (c >= '0' && c <= '9'))
  97
  98 static void hexdump( const unsigned char *buf, unsigned short len )
  99 {
 100         char str[80], octet[10];
 101         int ofs, i, l;
 102
 103         for (ofs = 0; ofs < len; ofs += 16) {
 104                 sprintf( str, "%03d: ", ofs );
 105
 106                 for (i = 0; i < 16; i++) {
 107                         if ((i + ofs) < len)
 108                                 sprintf( octet, "%02x ", buf[ofs + i] );
 109                         else
 110                                 strcpy( octet, "   " );
 111
 112                         strcat( str, octet );
 113                 }
 114                 strcat( str, "  " );
 115                 l = strlen( str );
 116
 117                 for (i = 0; (i < 16) && ((i + ofs) < len); i++)
 118                         str[l++] = isprint( buf[ofs + i] ) ? buf[ofs + i] : '.';
 119
 120                 str[l] = '\0';
 121                 printk( KERN_WARNING "%s\n", str );
 122         }
 123 }
 124
 125 #endif
 126
 127 struct dvb_net_priv {
 128         int in_use;
 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(ether_addr_equal(eth->h_dest,dev->broadcast))
 183                         skb->pkt_type=PACKET_BROADCAST;
 184                 else
 185                         skb->pkt_type=PACKET_MULTICAST;
 186         }
 187
 188         if (ntohs(eth->h_proto) >= ETH_P_802_3_MIN)
 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) < ETH_P_802_3_MIN) {
 232                 int framelen = p->ule_sndu_len - ((p->ule_next_hdr+sizeof(struct ethhdr)) - p->ule_skb->data);
 233                 /* A frame Type < ETH_P_802_3_MIN 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 < ETH_P_802_3_MIN);
 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         bool error = false;
 354
 355 #ifdef ULE_DEBUG
 356         /* The code inside ULE_DEBUG keeps a history of the last 100 TS cells processed. */
 357         static unsigned char ule_hist[100*TS_SZ];
 358         static unsigned char *ule_where = ule_hist, ule_dump;
 359 #endif
 360
 361         /* For all TS cells in current buffer.
 362          * Appearently, we are called for every single TS cell.
 363          */
 364         for (ts = buf, ts_end = buf + buf_len; ts < ts_end; /* no default incr. */ ) {
 365
 366                 if (new_ts) {
 367                         /* We are about to process a new TS cell. */
 368
 369 #ifdef ULE_DEBUG
 370                         if (ule_where >= &ule_hist[100*TS_SZ]) ule_where = ule_hist;
 371                         memcpy( ule_where, ts, TS_SZ );
 372                         if (ule_dump) {
 373                                 hexdump( ule_where, TS_SZ );
 374                                 ule_dump = 0;
 375                         }
 376                         ule_where += TS_SZ;
 377 #endif
 378
 379                         /* Check TS error conditions: sync_byte, transport_error_indicator, scrambling_control . */
 380                         if ((ts[0] != TS_SYNC) || (ts[1] & TS_TEI) || ((ts[3] & TS_SC) != 0)) {
 381                                 printk(KERN_WARNING "%lu: Invalid TS cell: SYNC %#x, TEI %u, SC %#x.\n",
 382                                        priv->ts_count, ts[0],
 383                                        (ts[1] & TS_TEI) >> 7,
 384                                        (ts[3] & TS_SC) >> 6);
 385
 386                                 /* Drop partly decoded SNDU, reset state, resync on PUSI. */
 387                                 if (priv->ule_skb) {
 388                                         dev_kfree_skb( priv->ule_skb );
 389                                         /* Prepare for next SNDU. */
 390                                         dev->stats.rx_errors++;
 391                                         dev->stats.rx_frame_errors++;
 392                                 }
 393                                 reset_ule(priv);
 394                                 priv->need_pusi = 1;
 395
 396                                 /* Continue with next TS cell. */
 397                                 ts += TS_SZ;
 398                                 priv->ts_count++;
 399                                 continue;
 400                         }
 401
 402                         ts_remain = 184;
 403                         from_where = ts + 4;
 404                 }
 405                 /* Synchronize on PUSI, if required. */
 406                 if (priv->need_pusi) {
 407                         if (ts[1] & TS_PUSI) {
 408                                 /* Find beginning of first ULE SNDU in current TS cell. */
 409                                 /* Synchronize continuity counter. */
 410                                 priv->tscc = ts[3] & 0x0F;
 411                                 /* There is a pointer field here. */
 412                                 if (ts[4] > ts_remain) {
 413                                         printk(KERN_ERR "%lu: Invalid ULE packet "
 414                                                "(pointer field %d)\n", priv->ts_count, ts[4]);
 415                                         ts += TS_SZ;
 416                                         priv->ts_count++;
 417                                         continue;
 418                                 }
 419                                 /* Skip to destination of pointer field. */
 420                                 from_where = &ts[5] + ts[4];
 421                                 ts_remain -= 1 + ts[4];
 422                                 skipped = 0;
 423                         } else {
 424                                 skipped++;
 425                                 ts += TS_SZ;
 426                                 priv->ts_count++;
 427                                 continue;
 428                         }
 429                 }
 430
 431                 if (new_ts) {
 432                         /* Check continuity counter. */
 433                         if ((ts[3] & 0x0F) == priv->tscc)
 434                                 priv->tscc = (priv->tscc + 1) & 0x0F;
 435                         else {
 436                                 /* TS discontinuity handling: */
 437                                 printk(KERN_WARNING "%lu: TS discontinuity: got %#x, "
 438                                        "expected %#x.\n", priv->ts_count, ts[3] & 0x0F, priv->tscc);
 439                                 /* Drop partly decoded SNDU, reset state, resync on PUSI. */
 440                                 if (priv->ule_skb) {
 441                                         dev_kfree_skb( priv->ule_skb );
 442                                         /* Prepare for next SNDU. */
 443                                         // reset_ule(priv);  moved to below.
 444                                         dev->stats.rx_errors++;
 445                                         dev->stats.rx_frame_errors++;
 446                                 }
 447                                 reset_ule(priv);
 448                                 /* skip to next PUSI. */
 449                                 priv->need_pusi = 1;
 450                                 continue;
 451                         }
 452                         /* If we still have an incomplete payload, but PUSI is
 453                          * set; some TS cells are missing.
 454                          * This is only possible here, if we missed exactly 16 TS
 455                          * cells (continuity counter wrap). */
 456                         if (ts[1] & TS_PUSI) {
 457                                 if (! priv->need_pusi) {
 458                                         if (!(*from_where < (ts_remain-1)) || *from_where != priv->ule_sndu_remain) {
 459                                                 /* Pointer field is invalid.  Drop this TS cell and any started ULE SNDU. */
 460                                                 printk(KERN_WARNING "%lu: Invalid pointer "
 461                                                        "field: %u.\n", priv->ts_count, *from_where);
 462
 463                                                 /* Drop partly decoded SNDU, reset state, resync on PUSI. */
 464                                                 if (priv->ule_skb) {
 465                                                         error = true;
 466                                                         dev_kfree_skb(priv->ule_skb);
 467                                                 }
 468
 469                                                 if (error || priv->ule_sndu_remain) {
 470                                                         dev->stats.rx_errors++;
 471                                                         dev->stats.rx_frame_errors++;
 472                                                         error = false;
 473                                                 }
 474
 475                                                 reset_ule(priv);
 476                                                 priv->need_pusi = 1;
 477                                                 continue;
 478                                         }
 479                                         /* Skip pointer field (we're processing a
 480                                          * packed payload). */
 481                                         from_where += 1;
 482                                         ts_remain -= 1;
 483                                 } else
 484                                         priv->need_pusi = 0;
 485
 486                                 if (priv->ule_sndu_remain > 183) {
 487                                         /* Current SNDU lacks more data than there could be available in the
 488                                          * current TS cell. */
 489                                         dev->stats.rx_errors++;
 490                                         dev->stats.rx_length_errors++;
 491                                         printk(KERN_WARNING "%lu: Expected %d more SNDU bytes, but "
 492                                                "got PUSI (pf %d, ts_remain %d).  Flushing incomplete payload.\n",
 493                                                priv->ts_count, priv->ule_sndu_remain, ts[4], ts_remain);
 494                                         dev_kfree_skb(priv->ule_skb);
 495                                         /* Prepare for next SNDU. */
 496                                         reset_ule(priv);
 497                                         /* Resync: go to where pointer field points to: start of next ULE SNDU. */
 498                                         from_where += ts[4];
 499                                         ts_remain -= ts[4];
 500                                 }
 501                         }
 502                 }
 503
 504                 /* Check if new payload needs to be started. */
 505                 if (priv->ule_skb == NULL) {
 506                         /* Start a new payload with skb.
 507                          * Find ULE header.  It is only guaranteed that the
 508                          * length field (2 bytes) is contained in the current
 509                          * TS.
 510                          * Check ts_remain has to be >= 2 here. */
 511                         if (ts_remain < 2) {
 512                                 printk(KERN_WARNING "Invalid payload packing: only %d "
 513                                        "bytes left in TS.  Resyncing.\n", ts_remain);
 514                                 priv->ule_sndu_len = 0;
 515                                 priv->need_pusi = 1;
 516                                 ts += TS_SZ;
 517                                 continue;
 518                         }
 519
 520                         if (! priv->ule_sndu_len) {
 521                                 /* Got at least two bytes, thus extrace the SNDU length. */
 522                                 priv->ule_sndu_len = from_where[0] << 8 | from_where[1];
 523                                 if (priv->ule_sndu_len & 0x8000) {
 524                                         /* D-Bit is set: no dest mac present. */
 525                                         priv->ule_sndu_len &= 0x7FFF;
 526                                         priv->ule_dbit = 1;
 527                                 } else
 528                                         priv->ule_dbit = 0;
 529
 530                                 if (priv->ule_sndu_len < 5) {
 531                                         printk(KERN_WARNING "%lu: Invalid ULE SNDU length %u. "
 532                                                "Resyncing.\n", priv->ts_count, priv->ule_sndu_len);
 533                                         dev->stats.rx_errors++;
 534                                         dev->stats.rx_length_errors++;
 535                                         priv->ule_sndu_len = 0;
 536                                         priv->need_pusi = 1;
 537                                         new_ts = 1;
 538                                         ts += TS_SZ;
 539                                         priv->ts_count++;
 540                                         continue;
 541                                 }
 542                                 ts_remain -= 2; /* consume the 2 bytes SNDU length. */
 543                                 from_where += 2;
 544                         }
 545
 546                         priv->ule_sndu_remain = priv->ule_sndu_len + 2;
 547                         /*
 548                          * State of current TS:
 549                          *   ts_remain (remaining bytes in the current TS cell)
 550                          *   0  ule_type is not available now, we need the next TS cell
 551                          *   1  the first byte of the ule_type is present
 552                          * >=2  full ULE header present, maybe some payload data as well.
 553                          */
 554                         switch (ts_remain) {
 555                                 case 1:
 556                                         priv->ule_sndu_remain--;
 557                                         priv->ule_sndu_type = from_where[0] << 8;
 558                                         priv->ule_sndu_type_1 = 1; /* first byte of ule_type is set. */
 559                                         ts_remain -= 1; from_where += 1;
 560                                         /* Continue w/ next TS. */
 561                                 case 0:
 562                                         new_ts = 1;
 563                                         ts += TS_SZ;
 564                                         priv->ts_count++;
 565                                         continue;
 566
 567                                 default: /* complete ULE header is present in current TS. */
 568                                         /* Extract ULE type field. */
 569                                         if (priv->ule_sndu_type_1) {
 570                                                 priv->ule_sndu_type_1 = 0;
 571                                                 priv->ule_sndu_type |= from_where[0];
 572                                                 from_where += 1; /* points to payload start. */
 573                                                 ts_remain -= 1;
 574                                         } else {
 575                                                 /* Complete type is present in new TS. */
 576                                                 priv->ule_sndu_type = from_where[0] << 8 | from_where[1];
 577                                                 from_where += 2; /* points to payload start. */
 578                                                 ts_remain -= 2;
 579                                         }
 580                                         break;
 581                         }
 582
 583                         /* Allocate the skb (decoder target buffer) with the correct size, as follows:
 584                          * prepare for the largest case: bridged SNDU with MAC address (dbit = 0). */
 585                         priv->ule_skb = dev_alloc_skb( priv->ule_sndu_len + ETH_HLEN + ETH_ALEN );
 586                         if (priv->ule_skb == NULL) {
 587                                 printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n",
 588                                        dev->name);
 589                                 dev->stats.rx_dropped++;
 590                                 return;
 591                         }
 592
 593                         /* This includes the CRC32 _and_ dest mac, if !dbit. */
 594                         priv->ule_sndu_remain = priv->ule_sndu_len;
 595                         priv->ule_skb->dev = dev;
 596                         /* Leave space for Ethernet or bridged SNDU header (eth hdr plus one MAC addr). */
 597                         skb_reserve( priv->ule_skb, ETH_HLEN + ETH_ALEN );
 598                 }
 599
 600                 /* Copy data into our current skb. */
 601                 how_much = min(priv->ule_sndu_remain, (int)ts_remain);
 602                 memcpy(skb_put(priv->ule_skb, how_much), from_where, how_much);
 603                 priv->ule_sndu_remain -= how_much;
 604                 ts_remain -= how_much;
 605                 from_where += how_much;
 606
 607                 /* Check for complete payload. */
 608                 if (priv->ule_sndu_remain <= 0) {
 609                         /* Check CRC32, we've got it in our skb already. */
 610                         __be16 ulen = htons(priv->ule_sndu_len);
 611                         __be16 utype = htons(priv->ule_sndu_type);
 612                         const u8 *tail;
 613                         struct kvec iov[3] = {
 614                                 { &ulen, sizeof ulen },
 615                                 { &utype, sizeof utype },
 616                                 { priv->ule_skb->data, priv->ule_skb->len - 4 }
 617                         };
 618                         u32 ule_crc = ~0L, expected_crc;
 619                         if (priv->ule_dbit) {
 620                                 /* Set D-bit for CRC32 verification,
 621                                  * if it was set originally. */
 622                                 ulen |= htons(0x8000);
 623                         }
 624
 625                         ule_crc = iov_crc32(ule_crc, iov, 3);
 626                         tail = skb_tail_pointer(priv->ule_skb);
 627                         expected_crc = *(tail - 4) << 24 |
 628                                        *(tail - 3) << 16 |
 629                                        *(tail - 2) << 8 |
 630                                        *(tail - 1);
 631                         if (ule_crc != expected_crc) {
 632                                 printk(KERN_WARNING "%lu: CRC32 check FAILED: %08x / %08x, SNDU len %d type %#x, ts_remain %d, next 2: %x.\n",
 633                                        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);
 634
 635 #ifdef ULE_DEBUG
 636                                 hexdump( iov[0].iov_base, iov[0].iov_len );
 637                                 hexdump( iov[1].iov_base, iov[1].iov_len );
 638                                 hexdump( iov[2].iov_base, iov[2].iov_len );
 639
 640                                 if (ule_where == ule_hist) {
 641                                         hexdump( &ule_hist[98*TS_SZ], TS_SZ );
 642                                         hexdump( &ule_hist[99*TS_SZ], TS_SZ );
 643                                 } else if (ule_where == &ule_hist[TS_SZ]) {
 644                                         hexdump( &ule_hist[99*TS_SZ], TS_SZ );
 645                                         hexdump( ule_hist, TS_SZ );
 646                                 } else {
 647                                         hexdump( ule_where - TS_SZ - TS_SZ, TS_SZ );
 648                                         hexdump( ule_where - TS_SZ, TS_SZ );
 649                                 }
 650                                 ule_dump = 1;
 651 #endif
 652
 653                                 dev->stats.rx_errors++;
 654                                 dev->stats.rx_crc_errors++;
 655                                 dev_kfree_skb(priv->ule_skb);
 656                         } else {
 657                                 /* CRC32 verified OK. */
 658                                 u8 dest_addr[ETH_ALEN];
 659                                 static const u8 bc_addr[ETH_ALEN] =
 660                                         { [ 0 ... ETH_ALEN-1] = 0xff };
 661
 662                                 /* CRC32 was OK. Remove it from skb. */
 663                                 priv->ule_skb->tail -= 4;
 664                                 priv->ule_skb->len -= 4;
 665
 666                                 if (!priv->ule_dbit) {
 667                                         /*
 668                                          * The destination MAC address is the
 669                                          * next data in the skb.  It comes
 670                                          * before any extension headers.
 671                                          *
 672                                          * Check if the payload of this SNDU
 673                                          * should be passed up the stack.
 674                                          */
 675                                         register int drop = 0;
 676                                         if (priv->rx_mode != RX_MODE_PROMISC) {
 677                                                 if (priv->ule_skb->data[0] & 0x01) {
 678                                                         /* multicast or broadcast */
 679                                                         if (!ether_addr_equal(priv->ule_skb->data, bc_addr)) {
 680                                                                 /* multicast */
 681                                                                 if (priv->rx_mode == RX_MODE_MULTI) {
 682                                                                         int i;
 683                                                                         for(i = 0; i < priv->multi_num &&
 684                                                                             !ether_addr_equal(priv->ule_skb->data,
 685                                                                                               priv->multi_macs[i]); i++)
 686                                                                                 ;
 687                                                                         if (i == priv->multi_num)
 688                                                                                 drop = 1;
 689                                                                 } else if (priv->rx_mode != RX_MODE_ALL_MULTI)
 690                                                                         drop = 1; /* no broadcast; */
 691                                                                 /* else: all multicast mode: accept all multicast packets */
 692                                                         }
 693                                                         /* else: broadcast */
 694                                                 }
 695                                                 else if (!ether_addr_equal(priv->ule_skb->data, dev->dev_addr))
 696                                                         drop = 1;
 697                                                 /* else: destination address matches the MAC address of our receiver device */
 698                                         }
 699                                         /* else: promiscuous mode; pass everything up the stack */
 700
 701                                         if (drop) {
 702 #ifdef ULE_DEBUG
 703                                                 dprintk("Dropping SNDU: MAC destination address does not match: dest addr: "MAC_ADDR_PRINTFMT", dev addr: "MAC_ADDR_PRINTFMT"\n",
 704                                                         MAX_ADDR_PRINTFMT_ARGS(priv->ule_skb->data), MAX_ADDR_PRINTFMT_ARGS(dev->dev_addr));
 705 #endif
 706                                                 dev_kfree_skb(priv->ule_skb);
 707                                                 goto sndu_done;
 708                                         }
 709                                         else
 710                                         {
 711                                                 skb_copy_from_linear_data(priv->ule_skb,
 712                                                               dest_addr,
 713                                                               ETH_ALEN);
 714                                                 skb_pull(priv->ule_skb, ETH_ALEN);
 715                                         }
 716                                 }
 717
 718                                 /* Handle ULE Extension Headers. */
 719                                 if (priv->ule_sndu_type < ETH_P_802_3_MIN) {
 720                                         /* There is an extension header.  Handle it accordingly. */
 721                                         int l = handle_ule_extensions(priv);
 722                                         if (l < 0) {
 723                                                 /* Mandatory extension header unknown or TEST SNDU.  Drop it. */
 724                                                 // printk( KERN_WARNING "Dropping SNDU, extension headers.\n" );
 725                                                 dev_kfree_skb(priv->ule_skb);
 726                                                 goto sndu_done;
 727                                         }
 728                                         skb_pull(priv->ule_skb, l);
 729                                 }
 730
 731                                 /*
 732                                  * Construct/assure correct ethernet header.
 733                                  * Note: in bridged mode (priv->ule_bridged !=
 734                                  * 0) we already have the (original) ethernet
 735                                  * header at the start of the payload (after
 736                                  * optional dest. address and any extension
 737                                  * headers).
 738                                  */
 739
 740                                 if (!priv->ule_bridged) {
 741                                         skb_push(priv->ule_skb, ETH_HLEN);
 742                                         ethh = (struct ethhdr *)priv->ule_skb->data;
 743                                         if (!priv->ule_dbit) {
 744                                                  /* dest_addr buffer is only valid if priv->ule_dbit == 0 */
 745                                                 memcpy(ethh->h_dest, dest_addr, ETH_ALEN);
 746                                                 memset(ethh->h_source, 0, ETH_ALEN);
 747                                         }
 748                                         else /* zeroize source and dest */
 749                                                 memset( ethh, 0, ETH_ALEN*2 );
 750
 751                                         ethh->h_proto = htons(priv->ule_sndu_type);
 752                                 }
 753                                 /* else:  skb is in correct state; nothing to do. */
 754                                 priv->ule_bridged = 0;
 755
 756                                 /* Stuff into kernel's protocol stack. */
 757                                 priv->ule_skb->protocol = dvb_net_eth_type_trans(priv->ule_skb, dev);
 758                                 /* If D-bit is set (i.e. destination MAC address not present),
 759                                  * receive the packet anyhow. */
 760                                 /* if (priv->ule_dbit && skb->pkt_type == PACKET_OTHERHOST)
 761                                         priv->ule_skb->pkt_type = PACKET_HOST; */
 762                                 dev->stats.rx_packets++;
 763                                 dev->stats.rx_bytes += priv->ule_skb->len;
 764                                 netif_rx(priv->ule_skb);
 765                         }
 766                         sndu_done:
 767                         /* Prepare for next SNDU. */
 768                         reset_ule(priv);
 769                 }
 770
 771                 /* More data in current TS (look at the bytes following the CRC32)? */
 772                 if (ts_remain >= 2 && *((unsigned short *)from_where) != 0xFFFF) {
 773                         /* Next ULE SNDU starts right there. */
 774                         new_ts = 0;
 775                         priv->ule_skb = NULL;
 776                         priv->ule_sndu_type_1 = 0;
 777                         priv->ule_sndu_len = 0;
 778                         // printk(KERN_WARNING "More data in current TS: [%#x %#x %#x %#x]\n",
 779                         //      *(from_where + 0), *(from_where + 1),
 780                         //      *(from_where + 2), *(from_where + 3));
 781                         // printk(KERN_WARNING "ts @ %p, stopped @ %p:\n", ts, from_where + 0);
 782                         // hexdump(ts, 188);
 783                 } else {
 784                         new_ts = 1;
 785                         ts += TS_SZ;
 786                         priv->ts_count++;
 787                         if (priv->ule_skb == NULL) {
 788                                 priv->need_pusi = 1;
 789                                 priv->ule_sndu_type_1 = 0;
 790                                 priv->ule_sndu_len = 0;
 791                         }
 792                 }
 793         }       /* for all available TS cells */
 794 }
 795
 796 static int dvb_net_ts_callback(const u8 *buffer1, size_t buffer1_len,
 797                                const u8 *buffer2, size_t buffer2_len,
 798                                struct dmx_ts_feed *feed, enum dmx_success success)
 799 {
 800         struct net_device *dev = feed->priv;
 801
 802         if (buffer2)
 803                 printk(KERN_WARNING "buffer2 not NULL: %p.\n", buffer2);
 804         if (buffer1_len > 32768)
 805                 printk(KERN_WARNING "length > 32k: %zu.\n", buffer1_len);
 806         /* printk("TS callback: %u bytes, %u TS cells @ %p.\n",
 807                   buffer1_len, buffer1_len / TS_SZ, buffer1); */
 808         dvb_net_ule(dev, buffer1, buffer1_len);
 809         return 0;
 810 }
 811
 812
 813 static void dvb_net_sec(struct net_device *dev,
 814                         const u8 *pkt, int pkt_len)
 815 {
 816         u8 *eth;
 817         struct sk_buff *skb;
 818         struct net_device_stats *stats = &dev->stats;
 819         int snap = 0;
 820
 821         /* note: pkt_len includes a 32bit checksum */
 822         if (pkt_len < 16) {
 823                 printk("%s: IP/MPE packet length = %d too small.\n",
 824                         dev->name, pkt_len);
 825                 stats->rx_errors++;
 826                 stats->rx_length_errors++;
 827                 return;
 828         }
 829 /* it seems some ISPs manage to screw up here, so we have to
 830  * relax the error checks... */
 831 #if 0
 832         if ((pkt[5] & 0xfd) != 0xc1) {
 833                 /* drop scrambled or broken packets */
 834 #else
 835         if ((pkt[5] & 0x3c) != 0x00) {
 836                 /* drop scrambled */
 837 #endif
 838                 stats->rx_errors++;
 839                 stats->rx_crc_errors++;
 840                 return;
 841         }
 842         if (pkt[5] & 0x02) {
 843                 /* handle LLC/SNAP, see rfc-1042 */
 844                 if (pkt_len < 24 || memcmp(&pkt[12], "\xaa\xaa\x03\0\0\0", 6)) {
 845                         stats->rx_dropped++;
 846                         return;
 847                 }
 848                 snap = 8;
 849         }
 850         if (pkt[7]) {
 851                 /* FIXME: assemble datagram from multiple sections */
 852                 stats->rx_errors++;
 853                 stats->rx_frame_errors++;
 854                 return;
 855         }
 856
 857         /* we have 14 byte ethernet header (ip header follows);
 858          * 12 byte MPE header; 4 byte checksum; + 2 byte alignment, 8 byte LLC/SNAP
 859          */
 860         if (!(skb = dev_alloc_skb(pkt_len - 4 - 12 + 14 + 2 - snap))) {
 861                 //printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n", dev->name);
 862                 stats->rx_dropped++;
 863                 return;
 864         }
 865         skb_reserve(skb, 2);    /* longword align L3 header */
 866         skb->dev = dev;
 867
 868         /* copy L3 payload */
 869         eth = (u8 *) skb_put(skb, pkt_len - 12 - 4 + 14 - snap);
 870         memcpy(eth + 14, pkt + 12 + snap, pkt_len - 12 - 4 - snap);
 871
 872         /* create ethernet header: */
 873         eth[0]=pkt[0x0b];
 874         eth[1]=pkt[0x0a];
 875         eth[2]=pkt[0x09];
 876         eth[3]=pkt[0x08];
 877         eth[4]=pkt[0x04];
 878         eth[5]=pkt[0x03];
 879
 880         eth[6]=eth[7]=eth[8]=eth[9]=eth[10]=eth[11]=0;
 881
 882         if (snap) {
 883                 eth[12] = pkt[18];
 884                 eth[13] = pkt[19];
 885         } else {
 886                 /* protocol numbers are from rfc-1700 or
 887                  * http://www.iana.org/assignments/ethernet-numbers
 888                  */
 889                 if (pkt[12] >> 4 == 6) { /* version field from IP header */
 890                         eth[12] = 0x86; /* IPv6 */
 891                         eth[13] = 0xdd;
 892                 } else {
 893                         eth[12] = 0x08; /* IPv4 */
 894                         eth[13] = 0x00;
 895                 }
 896         }
 897
 898         skb->protocol = dvb_net_eth_type_trans(skb, dev);
 899
 900         stats->rx_packets++;
 901         stats->rx_bytes+=skb->len;
 902         netif_rx(skb);
 903 }
 904
 905 static int dvb_net_sec_callback(const u8 *buffer1, size_t buffer1_len,
 906                  const u8 *buffer2, size_t buffer2_len,
 907                  struct dmx_section_filter *filter,
 908                  enum dmx_success success)
 909 {
 910         struct net_device *dev = filter->priv;
 911
 912         /**
 913          * we rely on the DVB API definition where exactly one complete
 914          * section is delivered in buffer1
 915          */
 916         dvb_net_sec (dev, buffer1, buffer1_len);
 917         return 0;
 918 }
 919
 920 static int dvb_net_tx(struct sk_buff *skb, struct net_device *dev)
 921 {
 922         dev_kfree_skb(skb);
 923         return NETDEV_TX_OK;
 924 }
 925
 926 static u8 mask_normal[6]={0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
 927 static u8 mask_allmulti[6]={0xff, 0xff, 0xff, 0x00, 0x00, 0x00};
 928 static u8 mac_allmulti[6]={0x01, 0x00, 0x5e, 0x00, 0x00, 0x00};
 929 static u8 mask_promisc[6]={0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
 930
 931 static int dvb_net_filter_sec_set(struct net_device *dev,
 932                    struct dmx_section_filter **secfilter,
 933                    u8 *mac, u8 *mac_mask)
 934 {
 935         struct dvb_net_priv *priv = netdev_priv(dev);
 936         int ret;
 937
 938         *secfilter=NULL;
 939         ret = priv->secfeed->allocate_filter(priv->secfeed, secfilter);
 940         if (ret<0) {
 941                 printk("%s: could not get filter\n", dev->name);
 942                 return ret;
 943         }
 944
 945         (*secfilter)->priv=(void *) dev;
 946
 947         memset((*secfilter)->filter_value, 0x00, DMX_MAX_FILTER_SIZE);
 948         memset((*secfilter)->filter_mask,  0x00, DMX_MAX_FILTER_SIZE);
 949         memset((*secfilter)->filter_mode,  0xff, DMX_MAX_FILTER_SIZE);
 950
 951         (*secfilter)->filter_value[0]=0x3e;
 952         (*secfilter)->filter_value[3]=mac[5];
 953         (*secfilter)->filter_value[4]=mac[4];
 954         (*secfilter)->filter_value[8]=mac[3];
 955         (*secfilter)->filter_value[9]=mac[2];
 956         (*secfilter)->filter_value[10]=mac[1];
 957         (*secfilter)->filter_value[11]=mac[0];
 958
 959         (*secfilter)->filter_mask[0] = 0xff;
 960         (*secfilter)->filter_mask[3] = mac_mask[5];
 961         (*secfilter)->filter_mask[4] = mac_mask[4];
 962         (*secfilter)->filter_mask[8] = mac_mask[3];
 963         (*secfilter)->filter_mask[9] = mac_mask[2];
 964         (*secfilter)->filter_mask[10] = mac_mask[1];
 965         (*secfilter)->filter_mask[11]=mac_mask[0];
 966
 967         dprintk("%s: filter mac=%pM\n", dev->name, mac);
 968         dprintk("%s: filter mask=%pM\n", dev->name, mac_mask);
 969
 970         return 0;
 971 }
 972
 973 static int dvb_net_feed_start(struct net_device *dev)
 974 {
 975         int ret = 0, i;
 976         struct dvb_net_priv *priv = netdev_priv(dev);
 977         struct dmx_demux *demux = priv->demux;
 978         unsigned char *mac = (unsigned char *) dev->dev_addr;
 979
 980         dprintk("%s: rx_mode %i\n", __func__, priv->rx_mode);
 981         mutex_lock(&priv->mutex);
 982         if (priv->tsfeed || priv->secfeed || priv->secfilter || priv->multi_secfilter[0])
 983                 printk("%s: BUG %d\n", __func__, __LINE__);
 984
 985         priv->secfeed=NULL;
 986         priv->secfilter=NULL;
 987         priv->tsfeed = NULL;
 988
 989         if (priv->feedtype == DVB_NET_FEEDTYPE_MPE) {
 990                 dprintk("%s: alloc secfeed\n", __func__);
 991                 ret=demux->allocate_section_feed(demux, &priv->secfeed,
 992                                          dvb_net_sec_callback);
 993                 if (ret<0) {
 994                         printk("%s: could not allocate section feed\n", dev->name);
 995                         goto error;
 996                 }
 997
 998                 ret = priv->secfeed->set(priv->secfeed, priv->pid, 32768, 1);
 999
1000                 if (ret<0) {
1001                         printk("%s: could not set section feed\n", dev->name);
1002                         priv->demux->release_section_feed(priv->demux, priv->secfeed);
1003                         priv->secfeed=NULL;
1004                         goto error;
1005                 }
1006
1007                 if (priv->rx_mode != RX_MODE_PROMISC) {
1008                         dprintk("%s: set secfilter\n", __func__);
1009                         dvb_net_filter_sec_set(dev, &priv->secfilter, mac, mask_normal);
1010                 }
1011
1012                 switch (priv->rx_mode) {
1013                 case RX_MODE_MULTI:
1014                         for (i = 0; i < priv->multi_num; i++) {
1015                                 dprintk("%s: set multi_secfilter[%d]\n", __func__, i);
1016                                 dvb_net_filter_sec_set(dev, &priv->multi_secfilter[i],
1017                                                        priv->multi_macs[i], mask_normal);
1018                         }
1019                         break;
1020                 case RX_MODE_ALL_MULTI:
1021                         priv->multi_num=1;
1022                         dprintk("%s: set multi_secfilter[0]\n", __func__);
1023                         dvb_net_filter_sec_set(dev, &priv->multi_secfilter[0],
1024                                                mac_allmulti, mask_allmulti);
1025                         break;
1026                 case RX_MODE_PROMISC:
1027                         priv->multi_num=0;
1028                         dprintk("%s: set secfilter\n", __func__);
1029                         dvb_net_filter_sec_set(dev, &priv->secfilter, mac, mask_promisc);
1030                         break;
1031                 }
1032
1033                 dprintk("%s: start filtering\n", __func__);
1034                 priv->secfeed->start_filtering(priv->secfeed);
1035         } else if (priv->feedtype == DVB_NET_FEEDTYPE_ULE) {
1036                 struct timespec timeout = { 0, 10000000 }; // 10 msec
1037
1038                 /* we have payloads encapsulated in TS */
1039                 dprintk("%s: alloc tsfeed\n", __func__);
1040                 ret = demux->allocate_ts_feed(demux, &priv->tsfeed, dvb_net_ts_callback);
1041                 if (ret < 0) {
1042                         printk("%s: could not allocate ts feed\n", dev->name);
1043                         goto error;
1044                 }
1045
1046                 /* Set netdevice pointer for ts decaps callback. */
1047                 priv->tsfeed->priv = (void *)dev;
1048                 ret = priv->tsfeed->set(priv->tsfeed,
1049                                         priv->pid, /* pid */
1050                                         TS_PACKET, /* type */
1051                                         DMX_PES_OTHER, /* pes type */
1052                                         32768,     /* circular buffer size */
1053                                         timeout    /* timeout */
1054                                         );
1055
1056                 if (ret < 0) {
1057                         printk("%s: could not set ts feed\n", dev->name);
1058                         priv->demux->release_ts_feed(priv->demux, priv->tsfeed);
1059                         priv->tsfeed = NULL;
1060                         goto error;
1061                 }
1062
1063                 dprintk("%s: start filtering\n", __func__);
1064                 priv->tsfeed->start_filtering(priv->tsfeed);
1065         } else
1066                 ret = -EINVAL;
1067
1068 error:
1069         mutex_unlock(&priv->mutex);
1070         return ret;
1071 }
1072
1073 static int dvb_net_feed_stop(struct net_device *dev)
1074 {
1075         struct dvb_net_priv *priv = netdev_priv(dev);
1076         int i, ret = 0;
1077
1078         dprintk("%s\n", __func__);
1079         mutex_lock(&priv->mutex);
1080         if (priv->feedtype == DVB_NET_FEEDTYPE_MPE) {
1081                 if (priv->secfeed) {
1082                         if (priv->secfeed->is_filtering) {
1083                                 dprintk("%s: stop secfeed\n", __func__);
1084                                 priv->secfeed->stop_filtering(priv->secfeed);
1085                         }
1086
1087                         if (priv->secfilter) {
1088                                 dprintk("%s: release secfilter\n", __func__);
1089                                 priv->secfeed->release_filter(priv->secfeed,
1090                                                               priv->secfilter);
1091                                 priv->secfilter=NULL;
1092                         }
1093
1094                         for (i=0; i<priv->multi_num; i++) {
1095                                 if (priv->multi_secfilter[i]) {
1096                                         dprintk("%s: release multi_filter[%d]\n",
1097                                                 __func__, i);
1098                                         priv->secfeed->release_filter(priv->secfeed,
1099                                                                       priv->multi_secfilter[i]);
1100                                         priv->multi_secfilter[i] = NULL;
1101                                 }
1102                         }
1103
1104                         priv->demux->release_section_feed(priv->demux, priv->secfeed);
1105                         priv->secfeed = NULL;
1106                 } else
1107                         printk("%s: no feed to stop\n", dev->name);
1108         } else if (priv->feedtype == DVB_NET_FEEDTYPE_ULE) {
1109                 if (priv->tsfeed) {
1110                         if (priv->tsfeed->is_filtering) {
1111                                 dprintk("%s: stop tsfeed\n", __func__);
1112                                 priv->tsfeed->stop_filtering(priv->tsfeed);
1113                         }
1114                         priv->demux->release_ts_feed(priv->demux, priv->tsfeed);
1115                         priv->tsfeed = NULL;
1116                 }
1117                 else
1118                         printk("%s: no ts feed to stop\n", dev->name);
1119         } else
1120                 ret = -EINVAL;
1121         mutex_unlock(&priv->mutex);
1122         return ret;
1123 }
1124
1125
1126 static int dvb_set_mc_filter(struct net_device *dev, unsigned char *addr)
1127 {
1128         struct dvb_net_priv *priv = netdev_priv(dev);
1129
1130         if (priv->multi_num == DVB_NET_MULTICAST_MAX)
1131                 return -ENOMEM;
1132
1133         memcpy(priv->multi_macs[priv->multi_num], addr, ETH_ALEN);
1134
1135         priv->multi_num++;
1136         return 0;
1137 }
1138
1139
1140 static void wq_set_multicast_list (struct work_struct *work)
1141 {
1142         struct dvb_net_priv *priv =
1143                 container_of(work, struct dvb_net_priv, set_multicast_list_wq);
1144         struct net_device *dev = priv->net;
1145
1146         dvb_net_feed_stop(dev);
1147         priv->rx_mode = RX_MODE_UNI;
1148         netif_addr_lock_bh(dev);
1149
1150         if (dev->flags & IFF_PROMISC) {
1151                 dprintk("%s: promiscuous mode\n", dev->name);
1152                 priv->rx_mode = RX_MODE_PROMISC;
1153         } else if ((dev->flags & IFF_ALLMULTI)) {
1154                 dprintk("%s: allmulti mode\n", dev->name);
1155                 priv->rx_mode = RX_MODE_ALL_MULTI;
1156         } else if (!netdev_mc_empty(dev)) {
1157                 struct netdev_hw_addr *ha;
1158
1159                 dprintk("%s: set_mc_list, %d entries\n",
1160                         dev->name, netdev_mc_count(dev));
1161
1162                 priv->rx_mode = RX_MODE_MULTI;
1163                 priv->multi_num = 0;
1164
1165                 netdev_for_each_mc_addr(ha, dev)
1166                         dvb_set_mc_filter(dev, ha->addr);
1167         }
1168
1169         netif_addr_unlock_bh(dev);
1170         dvb_net_feed_start(dev);
1171 }
1172
1173
1174 static void dvb_net_set_multicast_list (struct net_device *dev)
1175 {
1176         struct dvb_net_priv *priv = netdev_priv(dev);
1177         schedule_work(&priv->set_multicast_list_wq);
1178 }
1179
1180
1181 static void wq_restart_net_feed (struct work_struct *work)
1182 {
1183         struct dvb_net_priv *priv =
1184                 container_of(work, struct dvb_net_priv, restart_net_feed_wq);
1185         struct net_device *dev = priv->net;
1186
1187         if (netif_running(dev)) {
1188                 dvb_net_feed_stop(dev);
1189                 dvb_net_feed_start(dev);
1190         }
1191 }
1192
1193
1194 static int dvb_net_set_mac (struct net_device *dev, void *p)
1195 {
1196         struct dvb_net_priv *priv = netdev_priv(dev);
1197         struct sockaddr *addr=p;
1198
1199         memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1200
1201         if (netif_running(dev))
1202                 schedule_work(&priv->restart_net_feed_wq);
1203
1204         return 0;
1205 }
1206
1207
1208 static int dvb_net_open(struct net_device *dev)
1209 {
1210         struct dvb_net_priv *priv = netdev_priv(dev);
1211
1212         priv->in_use++;
1213         dvb_net_feed_start(dev);
1214         return 0;
1215 }
1216
1217
1218 static int dvb_net_stop(struct net_device *dev)
1219 {
1220         struct dvb_net_priv *priv = netdev_priv(dev);
1221
1222         priv->in_use--;
1223         return dvb_net_feed_stop(dev);
1224 }
1225
1226 static const struct header_ops dvb_header_ops = {
1227         .create         = eth_header,
1228         .parse          = eth_header_parse,
1229         .rebuild        = eth_rebuild_header,
1230 };
1231
1232
1233 static const struct net_device_ops dvb_netdev_ops = {
1234         .ndo_open               = dvb_net_open,
1235         .ndo_stop               = dvb_net_stop,
1236         .ndo_start_xmit         = dvb_net_tx,
1237         .ndo_set_rx_mode        = dvb_net_set_multicast_list,
1238         .ndo_set_mac_address    = dvb_net_set_mac,
1239         .ndo_change_mtu         = eth_change_mtu,
1240         .ndo_validate_addr      = eth_validate_addr,
1241 };
1242
1243 static void dvb_net_setup(struct net_device *dev)
1244 {
1245         ether_setup(dev);
1246
1247         dev->header_ops         = &dvb_header_ops;
1248         dev->netdev_ops         = &dvb_netdev_ops;
1249         dev->mtu                = 4096;
1250
1251         dev->flags |= IFF_NOARP;
1252 }
1253
1254 static int get_if(struct dvb_net *dvbnet)
1255 {
1256         int i;
1257
1258         for (i=0; i<DVB_NET_DEVICES_MAX; i++)
1259                 if (!dvbnet->state[i])
1260                         break;
1261
1262         if (i == DVB_NET_DEVICES_MAX)
1263                 return -1;
1264
1265         dvbnet->state[i]=1;
1266         return i;
1267 }
1268
1269 static int dvb_net_add_if(struct dvb_net *dvbnet, u16 pid, u8 feedtype)
1270 {
1271         struct net_device *net;
1272         struct dvb_net_priv *priv;
1273         int result;
1274         int if_num;
1275
1276         if (feedtype != DVB_NET_FEEDTYPE_MPE && feedtype != DVB_NET_FEEDTYPE_ULE)
1277                 return -EINVAL;
1278         if ((if_num = get_if(dvbnet)) < 0)
1279                 return -EINVAL;
1280
1281         net = alloc_netdev(sizeof(struct dvb_net_priv), "dvb",
1282                            NET_NAME_UNKNOWN, dvb_net_setup);
1283         if (!net)
1284                 return -ENOMEM;
1285
1286         if (dvbnet->dvbdev->id)
1287                 snprintf(net->name, IFNAMSIZ, "dvb%d%u%d",
1288                          dvbnet->dvbdev->adapter->num, dvbnet->dvbdev->id, if_num);
1289         else
1290                 /* compatibility fix to keep dvb0_0 format */
1291                 snprintf(net->name, IFNAMSIZ, "dvb%d_%d",
1292                          dvbnet->dvbdev->adapter->num, if_num);
1293
1294         net->addr_len = 6;
1295         memcpy(net->dev_addr, dvbnet->dvbdev->adapter->proposed_mac, 6);
1296
1297         dvbnet->device[if_num] = net;
1298
1299         priv = netdev_priv(net);
1300         priv->net = net;
1301         priv->demux = dvbnet->demux;
1302         priv->pid = pid;
1303         priv->rx_mode = RX_MODE_UNI;
1304         priv->need_pusi = 1;
1305         priv->tscc = 0;
1306         priv->feedtype = feedtype;
1307         reset_ule(priv);
1308
1309         INIT_WORK(&priv->set_multicast_list_wq, wq_set_multicast_list);
1310         INIT_WORK(&priv->restart_net_feed_wq, wq_restart_net_feed);
1311         mutex_init(&priv->mutex);
1312
1313         net->base_addr = pid;
1314
1315         if ((result = register_netdev(net)) < 0) {
1316                 dvbnet->device[if_num] = NULL;
1317                 free_netdev(net);
1318                 return result;
1319         }
1320         printk("dvb_net: created network interface %s\n", net->name);
1321
1322         return if_num;
1323 }
1324
1325 static int dvb_net_remove_if(struct dvb_net *dvbnet, unsigned long num)
1326 {
1327         struct net_device *net = dvbnet->device[num];
1328         struct dvb_net_priv *priv;
1329
1330         if (!dvbnet->state[num])
1331                 return -EINVAL;
1332         priv = netdev_priv(net);
1333         if (priv->in_use)
1334                 return -EBUSY;
1335
1336         dvb_net_stop(net);
1337         flush_work(&priv->set_multicast_list_wq);
1338         flush_work(&priv->restart_net_feed_wq);
1339         printk("dvb_net: removed network interface %s\n", net->name);
1340         unregister_netdev(net);
1341         dvbnet->state[num]=0;
1342         dvbnet->device[num] = NULL;
1343         free_netdev(net);
1344
1345         return 0;
1346 }
1347
1348 static int dvb_net_do_ioctl(struct file *file,
1349                   unsigned int cmd, void *parg)
1350 {
1351         struct dvb_device *dvbdev = file->private_data;
1352         struct dvb_net *dvbnet = dvbdev->priv;
1353         int ret = 0;
1354
1355         if (((file->f_flags&O_ACCMODE)==O_RDONLY))
1356                 return -EPERM;
1357
1358         if (mutex_lock_interruptible(&dvbnet->ioctl_mutex))
1359                 return -ERESTARTSYS;
1360
1361         switch (cmd) {
1362         case NET_ADD_IF:
1363         {
1364                 struct dvb_net_if *dvbnetif = parg;
1365                 int result;
1366
1367                 if (!capable(CAP_SYS_ADMIN)) {
1368                         ret = -EPERM;
1369                         goto ioctl_error;
1370                 }
1371
1372                 if (!try_module_get(dvbdev->adapter->module)) {
1373                         ret = -EPERM;
1374                         goto ioctl_error;
1375                 }
1376
1377                 result=dvb_net_add_if(dvbnet, dvbnetif->pid, dvbnetif->feedtype);
1378                 if (result<0) {
1379                         module_put(dvbdev->adapter->module);
1380                         ret = result;
1381                         goto ioctl_error;
1382                 }
1383                 dvbnetif->if_num=result;
1384                 break;
1385         }
1386         case NET_GET_IF:
1387         {
1388                 struct net_device *netdev;
1389                 struct dvb_net_priv *priv_data;
1390                 struct dvb_net_if *dvbnetif = parg;
1391
1392                 if (dvbnetif->if_num >= DVB_NET_DEVICES_MAX ||
1393                     !dvbnet->state[dvbnetif->if_num]) {
1394                         ret = -EINVAL;
1395                         goto ioctl_error;
1396                 }
1397
1398                 netdev = dvbnet->device[dvbnetif->if_num];
1399
1400                 priv_data = netdev_priv(netdev);
1401                 dvbnetif->pid=priv_data->pid;
1402                 dvbnetif->feedtype=priv_data->feedtype;
1403                 break;
1404         }
1405         case NET_REMOVE_IF:
1406         {
1407                 if (!capable(CAP_SYS_ADMIN)) {
1408                         ret = -EPERM;
1409                         goto ioctl_error;
1410                 }
1411                 if ((unsigned long) parg >= DVB_NET_DEVICES_MAX) {
1412                         ret = -EINVAL;
1413                         goto ioctl_error;
1414                 }
1415                 ret = dvb_net_remove_if(dvbnet, (unsigned long) parg);
1416                 if (!ret)
1417                         module_put(dvbdev->adapter->module);
1418                 break;
1419         }
1420
1421         /* binary compatibility cruft */
1422         case __NET_ADD_IF_OLD:
1423         {
1424                 struct __dvb_net_if_old *dvbnetif = parg;
1425                 int result;
1426
1427                 if (!capable(CAP_SYS_ADMIN)) {
1428                         ret = -EPERM;
1429                         goto ioctl_error;
1430                 }
1431
1432                 if (!try_module_get(dvbdev->adapter->module)) {
1433                         ret = -EPERM;
1434                         goto ioctl_error;
1435                 }
1436
1437                 result=dvb_net_add_if(dvbnet, dvbnetif->pid, DVB_NET_FEEDTYPE_MPE);
1438                 if (result<0) {
1439                         module_put(dvbdev->adapter->module);
1440                         ret = result;
1441                         goto ioctl_error;
1442                 }
1443                 dvbnetif->if_num=result;
1444                 break;
1445         }
1446         case __NET_GET_IF_OLD:
1447         {
1448                 struct net_device *netdev;
1449                 struct dvb_net_priv *priv_data;
1450                 struct __dvb_net_if_old *dvbnetif = parg;
1451
1452                 if (dvbnetif->if_num >= DVB_NET_DEVICES_MAX ||
1453                     !dvbnet->state[dvbnetif->if_num]) {
1454                         ret = -EINVAL;
1455                         goto ioctl_error;
1456                 }
1457
1458                 netdev = dvbnet->device[dvbnetif->if_num];
1459
1460                 priv_data = netdev_priv(netdev);
1461                 dvbnetif->pid=priv_data->pid;
1462                 break;
1463         }
1464         default:
1465                 ret = -ENOTTY;
1466                 break;
1467         }
1468
1469 ioctl_error:
1470         mutex_unlock(&dvbnet->ioctl_mutex);
1471         return ret;
1472 }
1473
1474 static long dvb_net_ioctl(struct file *file,
1475               unsigned int cmd, unsigned long arg)
1476 {
1477         return dvb_usercopy(file, cmd, arg, dvb_net_do_ioctl);
1478 }
1479
1480 static int dvb_net_close(struct inode *inode, struct file *file)
1481 {
1482         struct dvb_device *dvbdev = file->private_data;
1483         struct dvb_net *dvbnet = dvbdev->priv;
1484
1485         dvb_generic_release(inode, file);
1486
1487         if(dvbdev->users == 1 && dvbnet->exit == 1)
1488                 wake_up(&dvbdev->wait_queue);
1489         return 0;
1490 }
1491
1492
1493 static const struct file_operations dvb_net_fops = {
1494         .owner = THIS_MODULE,
1495         .unlocked_ioctl = dvb_net_ioctl,
1496         .open = dvb_generic_open,
1497         .release = dvb_net_close,
1498         .llseek = noop_llseek,
1499 };
1500
1501 static struct dvb_device dvbdev_net = {
1502         .priv = NULL,
1503         .users = 1,
1504         .writers = 1,
1505         .fops = &dvb_net_fops,
1506 };
1507
1508
1509 void dvb_net_release (struct dvb_net *dvbnet)
1510 {
1511         int i;
1512
1513         dvbnet->exit = 1;
1514         if (dvbnet->dvbdev->users < 1)
1515                 wait_event(dvbnet->dvbdev->wait_queue,
1516                                 dvbnet->dvbdev->users==1);
1517
1518         dvb_unregister_device(dvbnet->dvbdev);
1519
1520         for (i=0; i<DVB_NET_DEVICES_MAX; i++) {
1521                 if (!dvbnet->state[i])
1522                         continue;
1523                 dvb_net_remove_if(dvbnet, i);
1524         }
1525 }
1526 EXPORT_SYMBOL(dvb_net_release);
1527
1528
1529 int dvb_net_init (struct dvb_adapter *adap, struct dvb_net *dvbnet,
1530                   struct dmx_demux *dmx)
1531 {
1532         int i;
1533
1534         mutex_init(&dvbnet->ioctl_mutex);
1535         dvbnet->demux = dmx;
1536
1537         for (i=0; i<DVB_NET_DEVICES_MAX; i++)
1538                 dvbnet->state[i] = 0;
1539
1540         return dvb_register_device(adap, &dvbnet->dvbdev, &dvbdev_net,
1541                              dvbnet, DVB_DEVICE_NET);
1542 }
1543 EXPORT_SYMBOL(dvb_net_init);