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/smp_lock.h>
  63 #include <linux/uio.h>
  64 #include <asm/uaccess.h>
  65 #include <linux/crc32.h>
  66 #include <linux/mutex.h>
  67 #include <linux/sched.h>
  68
  69 #include "dvb_demux.h"
  70 #include "dvb_net.h"
  71
  72 static int dvb_net_debug;
  73 module_param(dvb_net_debug, int, 0444);
  74 MODULE_PARM_DESC(dvb_net_debug, "enable debug messages");
  75
  76 #define dprintk(x...) do { if (dvb_net_debug) printk(x); } while (0)
  77
  78
  79 static inline __u32 iov_crc32( __u32 c, struct kvec *iov, unsigned int cnt )
  80 {
  81         unsigned int j;
  82         for (j = 0; j < cnt; j++)
  83                 c = crc32_be( c, iov[j].iov_base, iov[j].iov_len );
  84         return c;
  85 }
  86
  87
  88 #define DVB_NET_MULTICAST_MAX 10
  89
  90 #undef ULE_DEBUG
  91
  92 #ifdef ULE_DEBUG
  93
  94 #define MAC_ADDR_PRINTFMT "%.2x:%.2x:%.2x:%.2x:%.2x:%.2x"
  95 #define MAX_ADDR_PRINTFMT_ARGS(macap) (macap)[0],(macap)[1],(macap)[2],(macap)[3],(macap)[4],(macap)[5]
  96
  97 #define isprint(c)      ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || (c >= '0' && c <= '9'))
  98
  99 static void hexdump( const unsigned char *buf, unsigned short len )
 100 {
 101         char str[80], octet[10];
 102         int ofs, i, l;
 103
 104         for (ofs = 0; ofs < len; ofs += 16) {
 105                 sprintf( str, "%03d: ", ofs );
 106
 107                 for (i = 0; i < 16; i++) {
 108                         if ((i + ofs) < len)
 109                                 sprintf( octet, "%02x ", buf[ofs + i] );
 110                         else
 111                                 strcpy( octet, "   " );
 112
 113                         strcat( str, octet );
 114                 }
 115                 strcat( str, "  " );
 116                 l = strlen( str );
 117
 118                 for (i = 0; (i < 16) && ((i + ofs) < len); i++)
 119                         str[l++] = isprint( buf[ofs + i] ) ? buf[ofs + i] : '.';
 120
 121                 str[l] = '\0';
 122                 printk( KERN_WARNING "%s\n", str );
 123         }
 124 }
 125
 126 #endif
 127
 128 struct dvb_net_priv {
 129         int in_use;
 130         u16 pid;
 131         struct net_device *net;
 132         struct dvb_net *host;
 133         struct dmx_demux *demux;
 134         struct dmx_section_feed *secfeed;
 135         struct dmx_section_filter *secfilter;
 136         struct dmx_ts_feed *tsfeed;
 137         int multi_num;
 138         struct dmx_section_filter *multi_secfilter[DVB_NET_MULTICAST_MAX];
 139         unsigned char multi_macs[DVB_NET_MULTICAST_MAX][6];
 140         int rx_mode;
 141 #define RX_MODE_UNI 0
 142 #define RX_MODE_MULTI 1
 143 #define RX_MODE_ALL_MULTI 2
 144 #define RX_MODE_PROMISC 3
 145         struct work_struct set_multicast_list_wq;
 146         struct work_struct restart_net_feed_wq;
 147         unsigned char feedtype;                 /* Either FEED_TYPE_ or FEED_TYPE_ULE */
 148         int need_pusi;                          /* Set to 1, if synchronization on PUSI required. */
 149         unsigned char tscc;                     /* TS continuity counter after sync on PUSI. */
 150         struct sk_buff *ule_skb;                /* ULE SNDU decodes into this buffer. */
 151         unsigned char *ule_next_hdr;            /* Pointer into skb to next ULE extension header. */
 152         unsigned short ule_sndu_len;            /* ULE SNDU length in bytes, w/o D-Bit. */
 153         unsigned short ule_sndu_type;           /* ULE SNDU type field, complete. */
 154         unsigned char ule_sndu_type_1;          /* ULE SNDU type field, if split across 2 TS cells. */
 155         unsigned char ule_dbit;                 /* Whether the DestMAC address present
 156                                                  * or not (bit is set). */
 157         unsigned char ule_bridged;              /* Whether the ULE_BRIDGED extension header was found. */
 158         int ule_sndu_remain;                    /* Nr. of bytes still required for current ULE SNDU. */
 159         unsigned long ts_count;                 /* Current ts cell counter. */
 160         struct mutex mutex;
 161 };
 162
 163
 164 /**
 165  *      Determine the packet's protocol ID. The rule here is that we
 166  *      assume 802.3 if the type field is short enough to be a length.
 167  *      This is normal practice and works for any 'now in use' protocol.
 168  *
 169  *  stolen from eth.c out of the linux kernel, hacked for dvb-device
 170  *  by Michael Holzt <kju@debian.org>
 171  */
 172 static __be16 dvb_net_eth_type_trans(struct sk_buff *skb,
 173                                       struct net_device *dev)
 174 {
 175         struct ethhdr *eth;
 176         unsigned char *rawp;
 177
 178         skb_reset_mac_header(skb);
 179         skb_pull(skb,dev->hard_header_len);
 180         eth = eth_hdr(skb);
 181
 182         if (*eth->h_dest & 1) {
 183                 if(memcmp(eth->h_dest,dev->broadcast, ETH_ALEN)==0)
 184                         skb->pkt_type=PACKET_BROADCAST;
 185                 else
 186                         skb->pkt_type=PACKET_MULTICAST;
 187         }
 188
 189         if (ntohs(eth->h_proto) >= 1536)
 190                 return eth->h_proto;
 191
 192         rawp = skb->data;
 193
 194         /**
 195          *      This is a magic hack to spot IPX packets. Older Novell breaks
 196          *      the protocol design and runs IPX over 802.3 without an 802.2 LLC
 197          *      layer. We look for FFFF which isn't a used 802.2 SSAP/DSAP. This
 198          *      won't work for fault tolerant netware but does for the rest.
 199          */
 200         if (*(unsigned short *)rawp == 0xFFFF)
 201                 return htons(ETH_P_802_3);
 202
 203         /**
 204          *      Real 802.2 LLC
 205          */
 206         return htons(ETH_P_802_2);
 207 }
 208
 209 #define TS_SZ   188
 210 #define TS_SYNC 0x47
 211 #define TS_TEI  0x80
 212 #define TS_SC   0xC0
 213 #define TS_PUSI 0x40
 214 #define TS_AF_A 0x20
 215 #define TS_AF_D 0x10
 216
 217 /* ULE Extension Header handlers. */
 218
 219 #define ULE_TEST        0
 220 #define ULE_BRIDGED     1
 221
 222 #define ULE_OPTEXTHDR_PADDING 0
 223
 224 static int ule_test_sndu( struct dvb_net_priv *p )
 225 {
 226         return -1;
 227 }
 228
 229 static int ule_bridged_sndu( struct dvb_net_priv *p )
 230 {
 231         struct ethhdr *hdr = (struct ethhdr*) p->ule_next_hdr;
 232         if(ntohs(hdr->h_proto) < 1536) {
 233                 int framelen = p->ule_sndu_len - ((p->ule_next_hdr+sizeof(struct ethhdr)) - p->ule_skb->data);
 234                 /* A frame Type < 1536 for a bridged frame, introduces a LLC Length field. */
 235                 if(framelen != ntohs(hdr->h_proto)) {
 236                         return -1;
 237                 }
 238         }
 239         /* Note:
 240          * From RFC4326:
 241          *  "A bridged SNDU is a Mandatory Extension Header of Type 1.
 242          *   It must be the final (or only) extension header specified in the header chain of a SNDU."
 243          * The 'ule_bridged' flag will cause the extension header processing loop to terminate.
 244          */
 245         p->ule_bridged = 1;
 246         return 0;
 247 }
 248
 249 static int ule_exthdr_padding(struct dvb_net_priv *p)
 250 {
 251         return 0;
 252 }
 253
 254 /** Handle ULE extension headers.
 255  *  Function is called after a successful CRC32 verification of an ULE SNDU to complete its decoding.
 256  *  Returns: >= 0: nr. of bytes consumed by next extension header
 257  *           -1:   Mandatory extension header that is not recognized or TEST SNDU; discard.
 258  */
 259 static int handle_one_ule_extension( struct dvb_net_priv *p )
 260 {
 261         /* Table of mandatory extension header handlers.  The header type is the index. */
 262         static int (*ule_mandatory_ext_handlers[255])( struct dvb_net_priv *p ) =
 263                 { [0] = ule_test_sndu, [1] = ule_bridged_sndu, [2] = NULL,  };
 264
 265         /* Table of optional extension header handlers.  The header type is the index. */
 266         static int (*ule_optional_ext_handlers[255])( struct dvb_net_priv *p ) =
 267                 { [0] = ule_exthdr_padding, [1] = NULL, };
 268
 269         int ext_len = 0;
 270         unsigned char hlen = (p->ule_sndu_type & 0x0700) >> 8;
 271         unsigned char htype = p->ule_sndu_type & 0x00FF;
 272
 273         /* Discriminate mandatory and optional extension headers. */
 274         if (hlen == 0) {
 275                 /* Mandatory extension header */
 276                 if (ule_mandatory_ext_handlers[htype]) {
 277                         ext_len = ule_mandatory_ext_handlers[htype]( p );
 278                         if(ext_len >= 0) {
 279                                 p->ule_next_hdr += ext_len;
 280                                 if (!p->ule_bridged) {
 281                                         p->ule_sndu_type = ntohs(*(__be16 *)p->ule_next_hdr);
 282                                         p->ule_next_hdr += 2;
 283                                 } else {
 284                                         p->ule_sndu_type = ntohs(*(__be16 *)(p->ule_next_hdr + ((p->ule_dbit ? 2 : 3) * ETH_ALEN)));
 285                                         /* This assures the extension handling loop will terminate. */
 286                                 }
 287                         }
 288                         // else: extension handler failed or SNDU should be discarded
 289                 } else
 290                         ext_len = -1;   /* SNDU has to be discarded. */
 291         } else {
 292                 /* Optional extension header.  Calculate the length. */
 293                 ext_len = hlen << 1;
 294                 /* Process the optional extension header according to its type. */
 295                 if (ule_optional_ext_handlers[htype])
 296                         (void)ule_optional_ext_handlers[htype]( p );
 297                 p->ule_next_hdr += ext_len;
 298                 p->ule_sndu_type = ntohs( *(__be16 *)(p->ule_next_hdr-2) );
 299                 /*
 300                  * note: the length of the next header type is included in the
 301                  * length of THIS optional extension header
 302                  */
 303         }
 304
 305         return ext_len;
 306 }
 307
 308 static int handle_ule_extensions( struct dvb_net_priv *p )
 309 {
 310         int total_ext_len = 0, l;
 311
 312         p->ule_next_hdr = p->ule_skb->data;
 313         do {
 314                 l = handle_one_ule_extension( p );
 315                 if (l < 0)
 316                         return l;       /* Stop extension header processing and discard SNDU. */
 317                 total_ext_len += l;
 318 #ifdef ULE_DEBUG
 319                 dprintk("handle_ule_extensions: ule_next_hdr=%p, ule_sndu_type=%i, "
 320                         "l=%i, total_ext_len=%i\n", p->ule_next_hdr,
 321                         (int) p->ule_sndu_type, l, total_ext_len);
 322 #endif
 323
 324         } while (p->ule_sndu_type < 1536);
 325
 326         return total_ext_len;
 327 }
 328
 329
 330 /** Prepare for a new ULE SNDU: reset the decoder state. */
 331 static inline void reset_ule( struct dvb_net_priv *p )
 332 {
 333         p->ule_skb = NULL;
 334         p->ule_next_hdr = NULL;
 335         p->ule_sndu_len = 0;
 336         p->ule_sndu_type = 0;
 337         p->ule_sndu_type_1 = 0;
 338         p->ule_sndu_remain = 0;
 339         p->ule_dbit = 0xFF;
 340         p->ule_bridged = 0;
 341 }
 342
 343 /**
 344  * Decode ULE SNDUs according to draft-ietf-ipdvb-ule-03.txt from a sequence of
 345  * TS cells of a single PID.
 346  */
 347 static void dvb_net_ule( struct net_device *dev, const u8 *buf, size_t buf_len )
 348 {
 349         struct dvb_net_priv *priv = netdev_priv(dev);
 350         unsigned long skipped = 0L;
 351         const u8 *ts, *ts_end, *from_where = NULL;
 352         u8 ts_remain = 0, how_much = 0, new_ts = 1;
 353         struct ethhdr *ethh = NULL;
 354         bool error = false;
 355
 356 #ifdef ULE_DEBUG
 357         /* The code inside ULE_DEBUG keeps a history of the last 100 TS cells processed. */
 358         static unsigned char ule_hist[100*TS_SZ];
 359         static unsigned char *ule_where = ule_hist, ule_dump;
 360 #endif
 361
 362         /* For all TS cells in current buffer.
 363          * Appearently, we are called for every single TS cell.
 364          */
 365         for (ts = buf, ts_end = buf + buf_len; ts < ts_end; /* no default incr. */ ) {
 366
 367                 if (new_ts) {
 368                         /* We are about to process a new TS cell. */
 369
 370 #ifdef ULE_DEBUG
 371                         if (ule_where >= &ule_hist[100*TS_SZ]) ule_where = ule_hist;
 372                         memcpy( ule_where, ts, TS_SZ );
 373                         if (ule_dump) {
 374                                 hexdump( ule_where, TS_SZ );
 375                                 ule_dump = 0;
 376                         }
 377                         ule_where += TS_SZ;
 378 #endif
 379
 380                         /* Check TS error conditions: sync_byte, transport_error_indicator, scrambling_control . */
 381                         if ((ts[0] != TS_SYNC) || (ts[1] & TS_TEI) || ((ts[3] & TS_SC) != 0)) {
 382                                 printk(KERN_WARNING "%lu: Invalid TS cell: SYNC %#x, TEI %u, SC %#x.\n",
 383                                        priv->ts_count, ts[0], ts[1] & TS_TEI >> 7, ts[3] & 0xC0 >> 6);
 384
 385                                 /* Drop partly decoded SNDU, reset state, resync on PUSI. */
 386                                 if (priv->ule_skb) {
 387                                         dev_kfree_skb( priv->ule_skb );
 388                                         /* Prepare for next SNDU. */
 389                                         dev->stats.rx_errors++;
 390                                         dev->stats.rx_frame_errors++;
 391                                 }
 392                                 reset_ule(priv);
 393                                 priv->need_pusi = 1;
 394
 395                                 /* Continue with next TS cell. */
 396                                 ts += TS_SZ;
 397                                 priv->ts_count++;
 398                                 continue;
 399                         }
 400
 401                         ts_remain = 184;
 402                         from_where = ts + 4;
 403                 }
 404                 /* Synchronize on PUSI, if required. */
 405                 if (priv->need_pusi) {
 406                         if (ts[1] & TS_PUSI) {
 407                                 /* Find beginning of first ULE SNDU in current TS cell. */
 408                                 /* Synchronize continuity counter. */
 409                                 priv->tscc = ts[3] & 0x0F;
 410                                 /* There is a pointer field here. */
 411                                 if (ts[4] > ts_remain) {
 412                                         printk(KERN_ERR "%lu: Invalid ULE packet "
 413                                                "(pointer field %d)\n", priv->ts_count, ts[4]);
 414                                         ts += TS_SZ;
 415                                         priv->ts_count++;
 416                                         continue;
 417                                 }
 418                                 /* Skip to destination of pointer field. */
 419                                 from_where = &ts[5] + ts[4];
 420                                 ts_remain -= 1 + ts[4];
 421                                 skipped = 0;
 422                         } else {
 423                                 skipped++;
 424                                 ts += TS_SZ;
 425                                 priv->ts_count++;
 426                                 continue;
 427                         }
 428                 }
 429
 430                 if (new_ts) {
 431                         /* Check continuity counter. */
 432                         if ((ts[3] & 0x0F) == priv->tscc)
 433                                 priv->tscc = (priv->tscc + 1) & 0x0F;
 434                         else {
 435                                 /* TS discontinuity handling: */
 436                                 printk(KERN_WARNING "%lu: TS discontinuity: got %#x, "
 437                                        "expected %#x.\n", priv->ts_count, ts[3] & 0x0F, priv->tscc);
 438                                 /* Drop partly decoded SNDU, reset state, resync on PUSI. */
 439                                 if (priv->ule_skb) {
 440                                         dev_kfree_skb( priv->ule_skb );
 441                                         /* Prepare for next SNDU. */
 442                                         // reset_ule(priv);  moved to below.
 443                                         dev->stats.rx_errors++;
 444                                         dev->stats.rx_frame_errors++;
 445                                 }
 446                                 reset_ule(priv);
 447                                 /* skip to next PUSI. */
 448                                 priv->need_pusi = 1;
 449                                 continue;
 450                         }
 451                         /* If we still have an incomplete payload, but PUSI is
 452                          * set; some TS cells are missing.
 453                          * This is only possible here, if we missed exactly 16 TS
 454                          * cells (continuity counter wrap). */
 455                         if (ts[1] & TS_PUSI) {
 456                                 if (! priv->need_pusi) {
 457                                         if (!(*from_where < (ts_remain-1)) || *from_where != priv->ule_sndu_remain) {
 458                                                 /* Pointer field is invalid.  Drop this TS cell and any started ULE SNDU. */
 459                                                 printk(KERN_WARNING "%lu: Invalid pointer "
 460                                                        "field: %u.\n", priv->ts_count, *from_where);
 461
 462                                                 /* Drop partly decoded SNDU, reset state, resync on PUSI. */
 463                                                 if (priv->ule_skb) {
 464                                                         error = true;
 465                                                         dev_kfree_skb(priv->ule_skb);
 466                                                 }
 467
 468                                                 if (error || priv->ule_sndu_remain) {
 469                                                         dev->stats.rx_errors++;
 470                                                         dev->stats.rx_frame_errors++;
 471                                                         error = false;
 472                                                 }
 473
 474                                                 reset_ule(priv);
 475                                                 priv->need_pusi = 1;
 476                                                 continue;
 477                                         }
 478                                         /* Skip pointer field (we're processing a
 479                                          * packed payload). */
 480                                         from_where += 1;
 481                                         ts_remain -= 1;
 482                                 } else
 483                                         priv->need_pusi = 0;
 484
 485                                 if (priv->ule_sndu_remain > 183) {
 486                                         /* Current SNDU lacks more data than there could be available in the
 487                                          * current TS cell. */
 488                                         dev->stats.rx_errors++;
 489                                         dev->stats.rx_length_errors++;
 490                                         printk(KERN_WARNING "%lu: Expected %d more SNDU bytes, but "
 491                                                "got PUSI (pf %d, ts_remain %d).  Flushing incomplete payload.\n",
 492                                                priv->ts_count, priv->ule_sndu_remain, ts[4], ts_remain);
 493                                         dev_kfree_skb(priv->ule_skb);
 494                                         /* Prepare for next SNDU. */
 495                                         reset_ule(priv);
 496                                         /* Resync: go to where pointer field points to: start of next ULE SNDU. */
 497                                         from_where += ts[4];
 498                                         ts_remain -= ts[4];
 499                                 }
 500                         }
 501                 }
 502
 503                 /* Check if new payload needs to be started. */
 504                 if (priv->ule_skb == NULL) {
 505                         /* Start a new payload with skb.
 506                          * Find ULE header.  It is only guaranteed that the
 507                          * length field (2 bytes) is contained in the current
 508                          * TS.
 509                          * Check ts_remain has to be >= 2 here. */
 510                         if (ts_remain < 2) {
 511                                 printk(KERN_WARNING "Invalid payload packing: only %d "
 512                                        "bytes left in TS.  Resyncing.\n", ts_remain);
 513                                 priv->ule_sndu_len = 0;
 514                                 priv->need_pusi = 1;
 515                                 ts += TS_SZ;
 516                                 continue;
 517                         }
 518
 519                         if (! priv->ule_sndu_len) {
 520                                 /* Got at least two bytes, thus extrace the SNDU length. */
 521                                 priv->ule_sndu_len = from_where[0] << 8 | from_where[1];
 522                                 if (priv->ule_sndu_len & 0x8000) {
 523                                         /* D-Bit is set: no dest mac present. */
 524                                         priv->ule_sndu_len &= 0x7FFF;
 525                                         priv->ule_dbit = 1;
 526                                 } else
 527                                         priv->ule_dbit = 0;
 528
 529                                 if (priv->ule_sndu_len < 5) {
 530                                         printk(KERN_WARNING "%lu: Invalid ULE SNDU length %u. "
 531                                                "Resyncing.\n", priv->ts_count, priv->ule_sndu_len);
 532                                         dev->stats.rx_errors++;
 533                                         dev->stats.rx_length_errors++;
 534                                         priv->ule_sndu_len = 0;
 535                                         priv->need_pusi = 1;
 536                                         new_ts = 1;
 537                                         ts += TS_SZ;
 538                                         priv->ts_count++;
 539                                         continue;
 540                                 }
 541                                 ts_remain -= 2; /* consume the 2 bytes SNDU length. */
 542                                 from_where += 2;
 543                         }
 544
 545                         priv->ule_sndu_remain = priv->ule_sndu_len + 2;
 546                         /*
 547                          * State of current TS:
 548                          *   ts_remain (remaining bytes in the current TS cell)
 549                          *   0  ule_type is not available now, we need the next TS cell
 550                          *   1  the first byte of the ule_type is present
 551                          * >=2  full ULE header present, maybe some payload data as well.
 552                          */
 553                         switch (ts_remain) {
 554                                 case 1:
 555                                         priv->ule_sndu_remain--;
 556                                         priv->ule_sndu_type = from_where[0] << 8;
 557                                         priv->ule_sndu_type_1 = 1; /* first byte of ule_type is set. */
 558                                         ts_remain -= 1; from_where += 1;
 559                                         /* Continue w/ next TS. */
 560                                 case 0:
 561                                         new_ts = 1;
 562                                         ts += TS_SZ;
 563                                         priv->ts_count++;
 564                                         continue;
 565
 566                                 default: /* complete ULE header is present in current TS. */
 567                                         /* Extract ULE type field. */
 568                                         if (priv->ule_sndu_type_1) {
 569                                                 priv->ule_sndu_type_1 = 0;
 570                                                 priv->ule_sndu_type |= from_where[0];
 571                                                 from_where += 1; /* points to payload start. */
 572                                                 ts_remain -= 1;
 573                                         } else {
 574                                                 /* Complete type is present in new TS. */
 575                                                 priv->ule_sndu_type = from_where[0] << 8 | from_where[1];
 576                                                 from_where += 2; /* points to payload start. */
 577                                                 ts_remain -= 2;
 578                                         }
 579                                         break;
 580                         }
 581
 582                         /* Allocate the skb (decoder target buffer) with the correct size, as follows:
 583                          * prepare for the largest case: bridged SNDU with MAC address (dbit = 0). */
 584                         priv->ule_skb = dev_alloc_skb( priv->ule_sndu_len + ETH_HLEN + ETH_ALEN );
 585                         if (priv->ule_skb == NULL) {
 586                                 printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n",
 587                                        dev->name);
 588                                 dev->stats.rx_dropped++;
 589                                 return;
 590                         }
 591
 592                         /* This includes the CRC32 _and_ dest mac, if !dbit. */
 593                         priv->ule_sndu_remain = priv->ule_sndu_len;
 594                         priv->ule_skb->dev = dev;
 595                         /* Leave space for Ethernet or bridged SNDU header (eth hdr plus one MAC addr). */
 596                         skb_reserve( priv->ule_skb, ETH_HLEN + ETH_ALEN );
 597                 }
 598
 599                 /* Copy data into our current skb. */
 600                 how_much = min(priv->ule_sndu_remain, (int)ts_remain);
 601                 memcpy(skb_put(priv->ule_skb, how_much), from_where, how_much);
 602                 priv->ule_sndu_remain -= how_much;
 603                 ts_remain -= how_much;
 604                 from_where += how_much;
 605
 606                 /* Check for complete payload. */
 607                 if (priv->ule_sndu_remain <= 0) {
 608                         /* Check CRC32, we've got it in our skb already. */
 609                         __be16 ulen = htons(priv->ule_sndu_len);
 610                         __be16 utype = htons(priv->ule_sndu_type);
 611                         const u8 *tail;
 612                         struct kvec iov[3] = {
 613                                 { &ulen, sizeof ulen },
 614                                 { &utype, sizeof utype },
 615                                 { priv->ule_skb->data, priv->ule_skb->len - 4 }
 616                         };
 617                         u32 ule_crc = ~0L, expected_crc;
 618                         if (priv->ule_dbit) {
 619                                 /* Set D-bit for CRC32 verification,
 620                                  * if it was set originally. */
 621                                 ulen |= htons(0x8000);
 622                         }
 623
 624                         ule_crc = iov_crc32(ule_crc, iov, 3);
 625                         tail = skb_tail_pointer(priv->ule_skb);
 626                         expected_crc = *(tail - 4) << 24 |
 627                                        *(tail - 3) << 16 |
 628                                        *(tail - 2) << 8 |
 629                                        *(tail - 1);
 630                         if (ule_crc != expected_crc) {
 631                                 printk(KERN_WARNING "%lu: CRC32 check FAILED: %08x / %08x, SNDU len %d type %#x, ts_remain %d, next 2: %x.\n",
 632                                        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);
 633
 634 #ifdef ULE_DEBUG
 635                                 hexdump( iov[0].iov_base, iov[0].iov_len );
 636                                 hexdump( iov[1].iov_base, iov[1].iov_len );
 637                                 hexdump( iov[2].iov_base, iov[2].iov_len );
 638
 639                                 if (ule_where == ule_hist) {
 640                                         hexdump( &ule_hist[98*TS_SZ], TS_SZ );
 641                                         hexdump( &ule_hist[99*TS_SZ], TS_SZ );
 642                                 } else if (ule_where == &ule_hist[TS_SZ]) {
 643                                         hexdump( &ule_hist[99*TS_SZ], TS_SZ );
 644                                         hexdump( ule_hist, TS_SZ );
 645                                 } else {
 646                                         hexdump( ule_where - TS_SZ - TS_SZ, TS_SZ );
 647                                         hexdump( ule_where - TS_SZ, TS_SZ );
 648                                 }
 649                                 ule_dump = 1;
 650 #endif
 651
 652                                 dev->stats.rx_errors++;
 653                                 dev->stats.rx_crc_errors++;
 654                                 dev_kfree_skb(priv->ule_skb);
 655                         } else {
 656                                 /* CRC32 verified OK. */
 657                                 u8 dest_addr[ETH_ALEN];
 658                                 static const u8 bc_addr[ETH_ALEN] =
 659                                         { [ 0 ... ETH_ALEN-1] = 0xff };
 660
 661                                 /* CRC32 was OK. Remove it from skb. */
 662                                 priv->ule_skb->tail -= 4;
 663                                 priv->ule_skb->len -= 4;
 664
 665                                 if (!priv->ule_dbit) {
 666                                         /*
 667                                          * The destination MAC address is the
 668                                          * next data in the skb.  It comes
 669                                          * before any extension headers.
 670                                          *
 671                                          * Check if the payload of this SNDU
 672                                          * should be passed up the stack.
 673                                          */
 674                                         register int drop = 0;
 675                                         if (priv->rx_mode != RX_MODE_PROMISC) {
 676                                                 if (priv->ule_skb->data[0] & 0x01) {
 677                                                         /* multicast or broadcast */
 678                                                         if (memcmp(priv->ule_skb->data, bc_addr, ETH_ALEN)) {
 679                                                                 /* multicast */
 680                                                                 if (priv->rx_mode == RX_MODE_MULTI) {
 681                                                                         int i;
 682                                                                         for(i = 0; i < priv->multi_num && memcmp(priv->ule_skb->data, priv->multi_macs[i], ETH_ALEN); i++)
 683                                                                                 ;
 684                                                                         if (i == priv->multi_num)
 685                                                                                 drop = 1;
 686                                                                 } else if (priv->rx_mode != RX_MODE_ALL_MULTI)
 687                                                                         drop = 1; /* no broadcast; */
 688                                                                 /* else: all multicast mode: accept all multicast packets */
 689                                                         }
 690                                                         /* else: broadcast */
 691                                                 }
 692                                                 else if (memcmp(priv->ule_skb->data, dev->dev_addr, ETH_ALEN))
 693                                                         drop = 1;
 694                                                 /* else: destination address matches the MAC address of our receiver device */
 695                                         }
 696                                         /* else: promiscuous mode; pass everything up the stack */
 697
 698                                         if (drop) {
 699 #ifdef ULE_DEBUG
 700                                                 dprintk("Dropping SNDU: MAC destination address does not match: dest addr: "MAC_ADDR_PRINTFMT", dev addr: "MAC_ADDR_PRINTFMT"\n",
 701                                                         MAX_ADDR_PRINTFMT_ARGS(priv->ule_skb->data), MAX_ADDR_PRINTFMT_ARGS(dev->dev_addr));
 702 #endif
 703                                                 dev_kfree_skb(priv->ule_skb);
 704                                                 goto sndu_done;
 705                                         }
 706                                         else
 707                                         {
 708                                                 skb_copy_from_linear_data(priv->ule_skb,
 709                                                               dest_addr,
 710                                                               ETH_ALEN);
 711                                                 skb_pull(priv->ule_skb, ETH_ALEN);
 712                                         }
 713                                 }
 714
 715                                 /* Handle ULE Extension Headers. */
 716                                 if (priv->ule_sndu_type < 1536) {
 717                                         /* There is an extension header.  Handle it accordingly. */
 718                                         int l = handle_ule_extensions(priv);
 719                                         if (l < 0) {
 720                                                 /* Mandatory extension header unknown or TEST SNDU.  Drop it. */
 721                                                 // printk( KERN_WARNING "Dropping SNDU, extension headers.\n" );
 722                                                 dev_kfree_skb(priv->ule_skb);
 723                                                 goto sndu_done;
 724                                         }
 725                                         skb_pull(priv->ule_skb, l);
 726                                 }
 727
 728                                 /*
 729                                  * Construct/assure correct ethernet header.
 730                                  * Note: in bridged mode (priv->ule_bridged !=
 731                                  * 0) we already have the (original) ethernet
 732                                  * header at the start of the payload (after
 733                                  * optional dest. address and any extension
 734                                  * headers).
 735                                  */
 736
 737                                 if (!priv->ule_bridged) {
 738                                         skb_push(priv->ule_skb, ETH_HLEN);
 739                                         ethh = (struct ethhdr *)priv->ule_skb->data;
 740                                         if (!priv->ule_dbit) {
 741                                                  /* dest_addr buffer is only valid if priv->ule_dbit == 0 */
 742                                                 memcpy(ethh->h_dest, dest_addr, ETH_ALEN);
 743                                                 memset(ethh->h_source, 0, ETH_ALEN);
 744                                         }
 745                                         else /* zeroize source and dest */
 746                                                 memset( ethh, 0, ETH_ALEN*2 );
 747
 748                                         ethh->h_proto = htons(priv->ule_sndu_type);
 749                                 }
 750                                 /* else:  skb is in correct state; nothing to do. */
 751                                 priv->ule_bridged = 0;
 752
 753                                 /* Stuff into kernel's protocol stack. */
 754                                 priv->ule_skb->protocol = dvb_net_eth_type_trans(priv->ule_skb, dev);
 755                                 /* If D-bit is set (i.e. destination MAC address not present),
 756                                  * receive the packet anyhow. */
 757                                 /* if (priv->ule_dbit && skb->pkt_type == PACKET_OTHERHOST)
 758                                         priv->ule_skb->pkt_type = PACKET_HOST; */
 759                                 dev->stats.rx_packets++;
 760                                 dev->stats.rx_bytes += priv->ule_skb->len;
 761                                 netif_rx(priv->ule_skb);
 762                         }
 763                         sndu_done:
 764                         /* Prepare for next SNDU. */
 765                         reset_ule(priv);
 766                 }
 767
 768                 /* More data in current TS (look at the bytes following the CRC32)? */
 769                 if (ts_remain >= 2 && *((unsigned short *)from_where) != 0xFFFF) {
 770                         /* Next ULE SNDU starts right there. */
 771                         new_ts = 0;
 772                         priv->ule_skb = NULL;
 773                         priv->ule_sndu_type_1 = 0;
 774                         priv->ule_sndu_len = 0;
 775                         // printk(KERN_WARNING "More data in current TS: [%#x %#x %#x %#x]\n",
 776                         //      *(from_where + 0), *(from_where + 1),
 777                         //      *(from_where + 2), *(from_where + 3));
 778                         // printk(KERN_WARNING "ts @ %p, stopped @ %p:\n", ts, from_where + 0);
 779                         // hexdump(ts, 188);
 780                 } else {
 781                         new_ts = 1;
 782                         ts += TS_SZ;
 783                         priv->ts_count++;
 784                         if (priv->ule_skb == NULL) {
 785                                 priv->need_pusi = 1;
 786                                 priv->ule_sndu_type_1 = 0;
 787                                 priv->ule_sndu_len = 0;
 788                         }
 789                 }
 790         }       /* for all available TS cells */
 791 }
 792
 793 static int dvb_net_ts_callback(const u8 *buffer1, size_t buffer1_len,
 794                                const u8 *buffer2, size_t buffer2_len,
 795                                struct dmx_ts_feed *feed, enum dmx_success success)
 796 {
 797         struct net_device *dev = feed->priv;
 798
 799         if (buffer2)
 800                 printk(KERN_WARNING "buffer2 not NULL: %p.\n", buffer2);
 801         if (buffer1_len > 32768)
 802                 printk(KERN_WARNING "length > 32k: %zu.\n", buffer1_len);
 803         /* printk("TS callback: %u bytes, %u TS cells @ %p.\n",
 804                   buffer1_len, buffer1_len / TS_SZ, buffer1); */
 805         dvb_net_ule(dev, buffer1, buffer1_len);
 806         return 0;
 807 }
 808
 809
 810 static void dvb_net_sec(struct net_device *dev,
 811                         const u8 *pkt, int pkt_len)
 812 {
 813         u8 *eth;
 814         struct sk_buff *skb;
 815         struct net_device_stats *stats = &dev->stats;
 816         int snap = 0;
 817
 818         /* note: pkt_len includes a 32bit checksum */
 819         if (pkt_len < 16) {
 820                 printk("%s: IP/MPE packet length = %d too small.\n",
 821                         dev->name, pkt_len);
 822                 stats->rx_errors++;
 823                 stats->rx_length_errors++;
 824                 return;
 825         }
 826 /* it seems some ISPs manage to screw up here, so we have to
 827  * relax the error checks... */
 828 #if 0
 829         if ((pkt[5] & 0xfd) != 0xc1) {
 830                 /* drop scrambled or broken packets */
 831 #else
 832         if ((pkt[5] & 0x3c) != 0x00) {
 833                 /* drop scrambled */
 834 #endif
 835                 stats->rx_errors++;
 836                 stats->rx_crc_errors++;
 837                 return;
 838         }
 839         if (pkt[5] & 0x02) {
 840                 /* handle LLC/SNAP, see rfc-1042 */
 841                 if (pkt_len < 24 || memcmp(&pkt[12], "\xaa\xaa\x03\0\0\0", 6)) {
 842                         stats->rx_dropped++;
 843                         return;
 844                 }
 845                 snap = 8;
 846         }
 847         if (pkt[7]) {
 848                 /* FIXME: assemble datagram from multiple sections */
 849                 stats->rx_errors++;
 850                 stats->rx_frame_errors++;
 851                 return;
 852         }
 853
 854         /* we have 14 byte ethernet header (ip header follows);
 855          * 12 byte MPE header; 4 byte checksum; + 2 byte alignment, 8 byte LLC/SNAP
 856          */
 857         if (!(skb = dev_alloc_skb(pkt_len - 4 - 12 + 14 + 2 - snap))) {
 858                 //printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n", dev->name);
 859                 stats->rx_dropped++;
 860                 return;
 861         }
 862         skb_reserve(skb, 2);    /* longword align L3 header */
 863         skb->dev = dev;
 864
 865         /* copy L3 payload */
 866         eth = (u8 *) skb_put(skb, pkt_len - 12 - 4 + 14 - snap);
 867         memcpy(eth + 14, pkt + 12 + snap, pkt_len - 12 - 4 - snap);
 868
 869         /* create ethernet header: */
 870         eth[0]=pkt[0x0b];
 871         eth[1]=pkt[0x0a];
 872         eth[2]=pkt[0x09];
 873         eth[3]=pkt[0x08];
 874         eth[4]=pkt[0x04];
 875         eth[5]=pkt[0x03];
 876
 877         eth[6]=eth[7]=eth[8]=eth[9]=eth[10]=eth[11]=0;
 878
 879         if (snap) {
 880                 eth[12] = pkt[18];
 881                 eth[13] = pkt[19];
 882         } else {
 883                 /* protocol numbers are from rfc-1700 or
 884                  * http://www.iana.org/assignments/ethernet-numbers
 885                  */
 886                 if (pkt[12] >> 4 == 6) { /* version field from IP header */
 887                         eth[12] = 0x86; /* IPv6 */
 888                         eth[13] = 0xdd;
 889                 } else {
 890                         eth[12] = 0x08; /* IPv4 */
 891                         eth[13] = 0x00;
 892                 }
 893         }
 894
 895         skb->protocol = dvb_net_eth_type_trans(skb, dev);
 896
 897         stats->rx_packets++;
 898         stats->rx_bytes+=skb->len;
 899         netif_rx(skb);
 900 }
 901
 902 static int dvb_net_sec_callback(const u8 *buffer1, size_t buffer1_len,
 903                  const u8 *buffer2, size_t buffer2_len,
 904                  struct dmx_section_filter *filter,
 905                  enum dmx_success success)
 906 {
 907         struct net_device *dev = filter->priv;
 908
 909         /**
 910          * we rely on the DVB API definition where exactly one complete
 911          * section is delivered in buffer1
 912          */
 913         dvb_net_sec (dev, buffer1, buffer1_len);
 914         return 0;
 915 }
 916
 917 static int dvb_net_tx(struct sk_buff *skb, struct net_device *dev)
 918 {
 919         dev_kfree_skb(skb);
 920         return NETDEV_TX_OK;
 921 }
 922
 923 static u8 mask_normal[6]={0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
 924 static u8 mask_allmulti[6]={0xff, 0xff, 0xff, 0x00, 0x00, 0x00};
 925 static u8 mac_allmulti[6]={0x01, 0x00, 0x5e, 0x00, 0x00, 0x00};
 926 static u8 mask_promisc[6]={0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
 927
 928 static int dvb_net_filter_sec_set(struct net_device *dev,
 929                    struct dmx_section_filter **secfilter,
 930                    u8 *mac, u8 *mac_mask)
 931 {
 932         struct dvb_net_priv *priv = netdev_priv(dev);
 933         int ret;
 934
 935         *secfilter=NULL;
 936         ret = priv->secfeed->allocate_filter(priv->secfeed, secfilter);
 937         if (ret<0) {
 938                 printk("%s: could not get filter\n", dev->name);
 939                 return ret;
 940         }
 941
 942         (*secfilter)->priv=(void *) dev;
 943
 944         memset((*secfilter)->filter_value, 0x00, DMX_MAX_FILTER_SIZE);
 945         memset((*secfilter)->filter_mask,  0x00, DMX_MAX_FILTER_SIZE);
 946         memset((*secfilter)->filter_mode,  0xff, DMX_MAX_FILTER_SIZE);
 947
 948         (*secfilter)->filter_value[0]=0x3e;
 949         (*secfilter)->filter_value[3]=mac[5];
 950         (*secfilter)->filter_value[4]=mac[4];
 951         (*secfilter)->filter_value[8]=mac[3];
 952         (*secfilter)->filter_value[9]=mac[2];
 953         (*secfilter)->filter_value[10]=mac[1];
 954         (*secfilter)->filter_value[11]=mac[0];
 955
 956         (*secfilter)->filter_mask[0] = 0xff;
 957         (*secfilter)->filter_mask[3] = mac_mask[5];
 958         (*secfilter)->filter_mask[4] = mac_mask[4];
 959         (*secfilter)->filter_mask[8] = mac_mask[3];
 960         (*secfilter)->filter_mask[9] = mac_mask[2];
 961         (*secfilter)->filter_mask[10] = mac_mask[1];
 962         (*secfilter)->filter_mask[11]=mac_mask[0];
 963
 964         dprintk("%s: filter mac=%pM\n", dev->name, mac);
 965         dprintk("%s: filter mask=%pM\n", dev->name, mac_mask);
 966
 967         return 0;
 968 }
 969
 970 static int dvb_net_feed_start(struct net_device *dev)
 971 {
 972         int ret = 0, i;
 973         struct dvb_net_priv *priv = netdev_priv(dev);
 974         struct dmx_demux *demux = priv->demux;
 975         unsigned char *mac = (unsigned char *) dev->dev_addr;
 976
 977         dprintk("%s: rx_mode %i\n", __func__, priv->rx_mode);
 978         mutex_lock(&priv->mutex);
 979         if (priv->tsfeed || priv->secfeed || priv->secfilter || priv->multi_secfilter[0])
 980                 printk("%s: BUG %d\n", __func__, __LINE__);
 981
 982         priv->secfeed=NULL;
 983         priv->secfilter=NULL;
 984         priv->tsfeed = NULL;
 985
 986         if (priv->feedtype == DVB_NET_FEEDTYPE_MPE) {
 987                 dprintk("%s: alloc secfeed\n", __func__);
 988                 ret=demux->allocate_section_feed(demux, &priv->secfeed,
 989                                          dvb_net_sec_callback);
 990                 if (ret<0) {
 991                         printk("%s: could not allocate section feed\n", dev->name);
 992                         goto error;
 993                 }
 994
 995                 ret = priv->secfeed->set(priv->secfeed, priv->pid, 32768, 1);
 996
 997                 if (ret<0) {
 998                         printk("%s: could not set section feed\n", dev->name);
 999                         priv->demux->release_section_feed(priv->demux, priv->secfeed);
1000                         priv->secfeed=NULL;
1001                         goto error;
1002                 }
1003
1004                 if (priv->rx_mode != RX_MODE_PROMISC) {
1005                         dprintk("%s: set secfilter\n", __func__);
1006                         dvb_net_filter_sec_set(dev, &priv->secfilter, mac, mask_normal);
1007                 }
1008
1009                 switch (priv->rx_mode) {
1010                 case RX_MODE_MULTI:
1011                         for (i = 0; i < priv->multi_num; i++) {
1012                                 dprintk("%s: set multi_secfilter[%d]\n", __func__, i);
1013                                 dvb_net_filter_sec_set(dev, &priv->multi_secfilter[i],
1014                                                        priv->multi_macs[i], mask_normal);
1015                         }
1016                         break;
1017                 case RX_MODE_ALL_MULTI:
1018                         priv->multi_num=1;
1019                         dprintk("%s: set multi_secfilter[0]\n", __func__);
1020                         dvb_net_filter_sec_set(dev, &priv->multi_secfilter[0],
1021                                                mac_allmulti, mask_allmulti);
1022                         break;
1023                 case RX_MODE_PROMISC:
1024                         priv->multi_num=0;
1025                         dprintk("%s: set secfilter\n", __func__);
1026                         dvb_net_filter_sec_set(dev, &priv->secfilter, mac, mask_promisc);
1027                         break;
1028                 }
1029
1030                 dprintk("%s: start filtering\n", __func__);
1031                 priv->secfeed->start_filtering(priv->secfeed);
1032         } else if (priv->feedtype == DVB_NET_FEEDTYPE_ULE) {
1033                 struct timespec timeout = { 0, 10000000 }; // 10 msec
1034
1035                 /* we have payloads encapsulated in TS */
1036                 dprintk("%s: alloc tsfeed\n", __func__);
1037                 ret = demux->allocate_ts_feed(demux, &priv->tsfeed, dvb_net_ts_callback);
1038                 if (ret < 0) {
1039                         printk("%s: could not allocate ts feed\n", dev->name);
1040                         goto error;
1041                 }
1042
1043                 /* Set netdevice pointer for ts decaps callback. */
1044                 priv->tsfeed->priv = (void *)dev;
1045                 ret = priv->tsfeed->set(priv->tsfeed,
1046                                         priv->pid, /* pid */
1047                                         TS_PACKET, /* type */
1048                                         DMX_TS_PES_OTHER, /* pes type */
1049                                         32768,     /* circular buffer size */
1050                                         timeout    /* timeout */
1051                                         );
1052
1053                 if (ret < 0) {
1054                         printk("%s: could not set ts feed\n", dev->name);
1055                         priv->demux->release_ts_feed(priv->demux, priv->tsfeed);
1056                         priv->tsfeed = NULL;
1057                         goto error;
1058                 }
1059
1060                 dprintk("%s: start filtering\n", __func__);
1061                 priv->tsfeed->start_filtering(priv->tsfeed);
1062         } else
1063                 ret = -EINVAL;
1064
1065 error:
1066         mutex_unlock(&priv->mutex);
1067         return ret;
1068 }
1069
1070 static int dvb_net_feed_stop(struct net_device *dev)
1071 {
1072         struct dvb_net_priv *priv = netdev_priv(dev);
1073         int i, ret = 0;
1074
1075         dprintk("%s\n", __func__);
1076         mutex_lock(&priv->mutex);
1077         if (priv->feedtype == DVB_NET_FEEDTYPE_MPE) {
1078                 if (priv->secfeed) {
1079                         if (priv->secfeed->is_filtering) {
1080                                 dprintk("%s: stop secfeed\n", __func__);
1081                                 priv->secfeed->stop_filtering(priv->secfeed);
1082                         }
1083
1084                         if (priv->secfilter) {
1085                                 dprintk("%s: release secfilter\n", __func__);
1086                                 priv->secfeed->release_filter(priv->secfeed,
1087                                                               priv->secfilter);
1088                                 priv->secfilter=NULL;
1089                         }
1090
1091                         for (i=0; i<priv->multi_num; i++) {
1092                                 if (priv->multi_secfilter[i]) {
1093                                         dprintk("%s: release multi_filter[%d]\n",
1094                                                 __func__, i);
1095                                         priv->secfeed->release_filter(priv->secfeed,
1096                                                                       priv->multi_secfilter[i]);
1097                                         priv->multi_secfilter[i] = NULL;
1098                                 }
1099                         }
1100
1101                         priv->demux->release_section_feed(priv->demux, priv->secfeed);
1102                         priv->secfeed = NULL;
1103                 } else
1104                         printk("%s: no feed to stop\n", dev->name);
1105         } else if (priv->feedtype == DVB_NET_FEEDTYPE_ULE) {
1106                 if (priv->tsfeed) {
1107                         if (priv->tsfeed->is_filtering) {
1108                                 dprintk("%s: stop tsfeed\n", __func__);
1109                                 priv->tsfeed->stop_filtering(priv->tsfeed);
1110                         }
1111                         priv->demux->release_ts_feed(priv->demux, priv->tsfeed);
1112                         priv->tsfeed = NULL;
1113                 }
1114                 else
1115                         printk("%s: no ts feed to stop\n", dev->name);
1116         } else
1117                 ret = -EINVAL;
1118         mutex_unlock(&priv->mutex);
1119         return ret;
1120 }
1121
1122
1123 static int dvb_set_mc_filter(struct net_device *dev, unsigned char *addr)
1124 {
1125         struct dvb_net_priv *priv = netdev_priv(dev);
1126
1127         if (priv->multi_num == DVB_NET_MULTICAST_MAX)
1128                 return -ENOMEM;
1129
1130         memcpy(priv->multi_macs[priv->multi_num], addr, ETH_ALEN);
1131
1132         priv->multi_num++;
1133         return 0;
1134 }
1135
1136
1137 static void wq_set_multicast_list (struct work_struct *work)
1138 {
1139         struct dvb_net_priv *priv =
1140                 container_of(work, struct dvb_net_priv, set_multicast_list_wq);
1141         struct net_device *dev = priv->net;
1142
1143         dvb_net_feed_stop(dev);
1144         priv->rx_mode = RX_MODE_UNI;
1145         netif_addr_lock_bh(dev);
1146
1147         if (dev->flags & IFF_PROMISC) {
1148                 dprintk("%s: promiscuous mode\n", dev->name);
1149                 priv->rx_mode = RX_MODE_PROMISC;
1150         } else if ((dev->flags & IFF_ALLMULTI)) {
1151                 dprintk("%s: allmulti mode\n", dev->name);
1152                 priv->rx_mode = RX_MODE_ALL_MULTI;
1153         } else if (!netdev_mc_empty(dev)) {
1154                 struct netdev_hw_addr *ha;
1155
1156                 dprintk("%s: set_mc_list, %d entries\n",
1157                         dev->name, netdev_mc_count(dev));
1158
1159                 priv->rx_mode = RX_MODE_MULTI;
1160                 priv->multi_num = 0;
1161
1162                 netdev_for_each_mc_addr(ha, dev)
1163                         dvb_set_mc_filter(dev, ha->addr);
1164         }
1165
1166         netif_addr_unlock_bh(dev);
1167         dvb_net_feed_start(dev);
1168 }
1169
1170
1171 static void dvb_net_set_multicast_list (struct net_device *dev)
1172 {
1173         struct dvb_net_priv *priv = netdev_priv(dev);
1174         schedule_work(&priv->set_multicast_list_wq);
1175 }
1176
1177
1178 static void wq_restart_net_feed (struct work_struct *work)
1179 {
1180         struct dvb_net_priv *priv =
1181                 container_of(work, struct dvb_net_priv, restart_net_feed_wq);
1182         struct net_device *dev = priv->net;
1183
1184         if (netif_running(dev)) {
1185                 dvb_net_feed_stop(dev);
1186                 dvb_net_feed_start(dev);
1187         }
1188 }
1189
1190
1191 static int dvb_net_set_mac (struct net_device *dev, void *p)
1192 {
1193         struct dvb_net_priv *priv = netdev_priv(dev);
1194         struct sockaddr *addr=p;
1195
1196         memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1197
1198         if (netif_running(dev))
1199                 schedule_work(&priv->restart_net_feed_wq);
1200
1201         return 0;
1202 }
1203
1204
1205 static int dvb_net_open(struct net_device *dev)
1206 {
1207         struct dvb_net_priv *priv = netdev_priv(dev);
1208
1209         priv->in_use++;
1210         dvb_net_feed_start(dev);
1211         return 0;
1212 }
1213
1214
1215 static int dvb_net_stop(struct net_device *dev)
1216 {
1217         struct dvb_net_priv *priv = netdev_priv(dev);
1218
1219         priv->in_use--;
1220         return dvb_net_feed_stop(dev);
1221 }
1222
1223 static const struct header_ops dvb_header_ops = {
1224         .create         = eth_header,
1225         .parse          = eth_header_parse,
1226         .rebuild        = eth_rebuild_header,
1227 };
1228
1229
1230 static const struct net_device_ops dvb_netdev_ops = {
1231         .ndo_open               = dvb_net_open,
1232         .ndo_stop               = dvb_net_stop,
1233         .ndo_start_xmit         = dvb_net_tx,
1234         .ndo_set_multicast_list = dvb_net_set_multicast_list,
1235         .ndo_set_mac_address    = dvb_net_set_mac,
1236         .ndo_change_mtu         = eth_change_mtu,
1237         .ndo_validate_addr      = eth_validate_addr,
1238 };
1239
1240 static void dvb_net_setup(struct net_device *dev)
1241 {
1242         ether_setup(dev);
1243
1244         dev->header_ops         = &dvb_header_ops;
1245         dev->netdev_ops         = &dvb_netdev_ops;
1246         dev->mtu                = 4096;
1247
1248         dev->flags |= IFF_NOARP;
1249 }
1250
1251 static int get_if(struct dvb_net *dvbnet)
1252 {
1253         int i;
1254
1255         for (i=0; i<DVB_NET_DEVICES_MAX; i++)
1256                 if (!dvbnet->state[i])
1257                         break;
1258
1259         if (i == DVB_NET_DEVICES_MAX)
1260                 return -1;
1261
1262         dvbnet->state[i]=1;
1263         return i;
1264 }
1265
1266 static int dvb_net_add_if(struct dvb_net *dvbnet, u16 pid, u8 feedtype)
1267 {
1268         struct net_device *net;
1269         struct dvb_net_priv *priv;
1270         int result;
1271         int if_num;
1272
1273         if (feedtype != DVB_NET_FEEDTYPE_MPE && feedtype != DVB_NET_FEEDTYPE_ULE)
1274                 return -EINVAL;
1275         if ((if_num = get_if(dvbnet)) < 0)
1276                 return -EINVAL;
1277
1278         net = alloc_netdev(sizeof(struct dvb_net_priv), "dvb", dvb_net_setup);
1279         if (!net)
1280                 return -ENOMEM;
1281
1282         if (dvbnet->dvbdev->id)
1283                 snprintf(net->name, IFNAMSIZ, "dvb%d%u%d",
1284                          dvbnet->dvbdev->adapter->num, dvbnet->dvbdev->id, if_num);
1285         else
1286                 /* compatibility fix to keep dvb0_0 format */
1287                 snprintf(net->name, IFNAMSIZ, "dvb%d_%d",
1288                          dvbnet->dvbdev->adapter->num, if_num);
1289
1290         net->addr_len = 6;
1291         memcpy(net->dev_addr, dvbnet->dvbdev->adapter->proposed_mac, 6);
1292
1293         dvbnet->device[if_num] = net;
1294
1295         priv = netdev_priv(net);
1296         priv->net = net;
1297         priv->demux = dvbnet->demux;
1298         priv->pid = pid;
1299         priv->rx_mode = RX_MODE_UNI;
1300         priv->need_pusi = 1;
1301         priv->tscc = 0;
1302         priv->feedtype = feedtype;
1303         reset_ule(priv);
1304
1305         INIT_WORK(&priv->set_multicast_list_wq, wq_set_multicast_list);
1306         INIT_WORK(&priv->restart_net_feed_wq, wq_restart_net_feed);
1307         mutex_init(&priv->mutex);
1308
1309         net->base_addr = pid;
1310
1311         if ((result = register_netdev(net)) < 0) {
1312                 dvbnet->device[if_num] = NULL;
1313                 free_netdev(net);
1314                 return result;
1315         }
1316         printk("dvb_net: created network interface %s\n", net->name);
1317
1318         return if_num;
1319 }
1320
1321 static int dvb_net_remove_if(struct dvb_net *dvbnet, unsigned long num)
1322 {
1323         struct net_device *net = dvbnet->device[num];
1324         struct dvb_net_priv *priv;
1325
1326         if (!dvbnet->state[num])
1327                 return -EINVAL;
1328         priv = netdev_priv(net);
1329         if (priv->in_use)
1330                 return -EBUSY;
1331
1332         dvb_net_stop(net);
1333         flush_scheduled_work();
1334         printk("dvb_net: removed network interface %s\n", net->name);
1335         unregister_netdev(net);
1336         dvbnet->state[num]=0;
1337         dvbnet->device[num] = NULL;
1338         free_netdev(net);
1339
1340         return 0;
1341 }
1342
1343 static int dvb_net_do_ioctl(struct file *file,
1344                   unsigned int cmd, void *parg)
1345 {
1346         struct dvb_device *dvbdev = file->private_data;
1347         struct dvb_net *dvbnet = dvbdev->priv;
1348
1349         if (((file->f_flags&O_ACCMODE)==O_RDONLY))
1350                 return -EPERM;
1351
1352         switch (cmd) {
1353         case NET_ADD_IF:
1354         {
1355                 struct dvb_net_if *dvbnetif = parg;
1356                 int result;
1357
1358                 if (!capable(CAP_SYS_ADMIN))
1359                         return -EPERM;
1360
1361                 if (!try_module_get(dvbdev->adapter->module))
1362                         return -EPERM;
1363
1364                 result=dvb_net_add_if(dvbnet, dvbnetif->pid, dvbnetif->feedtype);
1365                 if (result<0) {
1366                         module_put(dvbdev->adapter->module);
1367                         return result;
1368                 }
1369                 dvbnetif->if_num=result;
1370                 break;
1371         }
1372         case NET_GET_IF:
1373         {
1374                 struct net_device *netdev;
1375                 struct dvb_net_priv *priv_data;
1376                 struct dvb_net_if *dvbnetif = parg;
1377
1378                 if (dvbnetif->if_num >= DVB_NET_DEVICES_MAX ||
1379                     !dvbnet->state[dvbnetif->if_num])
1380                         return -EINVAL;
1381
1382                 netdev = dvbnet->device[dvbnetif->if_num];
1383
1384                 priv_data = netdev_priv(netdev);
1385                 dvbnetif->pid=priv_data->pid;
1386                 dvbnetif->feedtype=priv_data->feedtype;
1387                 break;
1388         }
1389         case NET_REMOVE_IF:
1390         {
1391                 int ret;
1392
1393                 if (!capable(CAP_SYS_ADMIN))
1394                         return -EPERM;
1395                 if ((unsigned long) parg >= DVB_NET_DEVICES_MAX)
1396                         return -EINVAL;
1397                 ret = dvb_net_remove_if(dvbnet, (unsigned long) parg);
1398                 if (!ret)
1399                         module_put(dvbdev->adapter->module);
1400                 return ret;
1401         }
1402
1403         /* binary compatibility cruft */
1404         case __NET_ADD_IF_OLD:
1405         {
1406                 struct __dvb_net_if_old *dvbnetif = parg;
1407                 int result;
1408
1409                 if (!capable(CAP_SYS_ADMIN))
1410                         return -EPERM;
1411
1412                 if (!try_module_get(dvbdev->adapter->module))
1413                         return -EPERM;
1414
1415                 result=dvb_net_add_if(dvbnet, dvbnetif->pid, DVB_NET_FEEDTYPE_MPE);
1416                 if (result<0) {
1417                         module_put(dvbdev->adapter->module);
1418                         return result;
1419                 }
1420                 dvbnetif->if_num=result;
1421                 break;
1422         }
1423         case __NET_GET_IF_OLD:
1424         {
1425                 struct net_device *netdev;
1426                 struct dvb_net_priv *priv_data;
1427                 struct __dvb_net_if_old *dvbnetif = parg;
1428
1429                 if (dvbnetif->if_num >= DVB_NET_DEVICES_MAX ||
1430                     !dvbnet->state[dvbnetif->if_num])
1431                         return -EINVAL;
1432
1433                 netdev = dvbnet->device[dvbnetif->if_num];
1434
1435                 priv_data = netdev_priv(netdev);
1436                 dvbnetif->pid=priv_data->pid;
1437                 break;
1438         }
1439         default:
1440                 return -ENOTTY;
1441         }
1442         return 0;
1443 }
1444
1445 static long dvb_net_ioctl(struct file *file,
1446               unsigned int cmd, unsigned long arg)
1447 {
1448         int ret;
1449
1450         lock_kernel();
1451         ret = dvb_usercopy(file, cmd, arg, dvb_net_do_ioctl);
1452         unlock_kernel();
1453
1454         return ret;
1455 }
1456
1457 static int dvb_net_close(struct inode *inode, struct file *file)
1458 {
1459         struct dvb_device *dvbdev = file->private_data;
1460         struct dvb_net *dvbnet = dvbdev->priv;
1461
1462         dvb_generic_release(inode, file);
1463
1464         if(dvbdev->users == 1 && dvbnet->exit == 1) {
1465                 fops_put(file->f_op);
1466                 file->f_op = NULL;
1467                 wake_up(&dvbdev->wait_queue);
1468         }
1469         return 0;
1470 }
1471
1472
1473 static const struct file_operations dvb_net_fops = {
1474         .owner = THIS_MODULE,
1475         .unlocked_ioctl = dvb_net_ioctl,
1476         .open = dvb_generic_open,
1477         .release = dvb_net_close,
1478 };
1479
1480 static struct dvb_device dvbdev_net = {
1481         .priv = NULL,
1482         .users = 1,
1483         .writers = 1,
1484         .fops = &dvb_net_fops,
1485 };
1486
1487
1488 void dvb_net_release (struct dvb_net *dvbnet)
1489 {
1490         int i;
1491
1492         dvbnet->exit = 1;
1493         if (dvbnet->dvbdev->users < 1)
1494                 wait_event(dvbnet->dvbdev->wait_queue,
1495                                 dvbnet->dvbdev->users==1);
1496
1497         dvb_unregister_device(dvbnet->dvbdev);
1498
1499         for (i=0; i<DVB_NET_DEVICES_MAX; i++) {
1500                 if (!dvbnet->state[i])
1501                         continue;
1502                 dvb_net_remove_if(dvbnet, i);
1503         }
1504 }
1505 EXPORT_SYMBOL(dvb_net_release);
1506
1507
1508 int dvb_net_init (struct dvb_adapter *adap, struct dvb_net *dvbnet,
1509                   struct dmx_demux *dmx)
1510 {
1511         int i;
1512
1513         dvbnet->demux = dmx;
1514
1515         for (i=0; i<DVB_NET_DEVICES_MAX; i++)
1516                 dvbnet->state[i] = 0;
1517
1518         dvb_register_device (adap, &dvbnet->dvbdev, &dvbdev_net,
1519                              dvbnet, DVB_DEVICE_NET);
1520
1521         return 0;
1522 }
1523 EXPORT_SYMBOL(dvb_net_init);