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
 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], ts[1] & TS_TEI >> 7, ts[3] & 0xC0 >> 6);
 383
 384                                 /* Drop partly decoded SNDU, reset state, resync on PUSI. */
 385                                 if (priv->ule_skb) {
 386                                         dev_kfree_skb( priv->ule_skb );
 387                                         /* Prepare for next SNDU. */
 388                                         dev->stats.rx_errors++;
 389                                         dev->stats.rx_frame_errors++;
 390                                 }
 391                                 reset_ule(priv);
 392                                 priv->need_pusi = 1;
 393
 394                                 /* Continue with next TS cell. */
 395                                 ts += TS_SZ;
 396                                 priv->ts_count++;
 397                                 continue;
 398                         }
 399
 400                         ts_remain = 184;
 401                         from_where = ts + 4;
 402                 }
 403                 /* Synchronize on PUSI, if required. */
 404                 if (priv->need_pusi) {
 405                         if (ts[1] & TS_PUSI) {
 406                                 /* Find beginning of first ULE SNDU in current TS cell. */
 407                                 /* Synchronize continuity counter. */
 408                                 priv->tscc = ts[3] & 0x0F;
 409                                 /* There is a pointer field here. */
 410                                 if (ts[4] > ts_remain) {
 411                                         printk(KERN_ERR "%lu: Invalid ULE packet "
 412                                                "(pointer field %d)\n", priv->ts_count, ts[4]);
 413                                         ts += TS_SZ;
 414                                         priv->ts_count++;
 415                                         continue;
 416                                 }
 417                                 /* Skip to destination of pointer field. */
 418                                 from_where = &ts[5] + ts[4];
 419                                 ts_remain -= 1 + ts[4];
 420                                 skipped = 0;
 421                         } else {
 422                                 skipped++;
 423                                 ts += TS_SZ;
 424                                 priv->ts_count++;
 425                                 continue;
 426                         }
 427                 }
 428
 429                 if (new_ts) {
 430                         /* Check continuity counter. */
 431                         if ((ts[3] & 0x0F) == priv->tscc)
 432                                 priv->tscc = (priv->tscc + 1) & 0x0F;
 433                         else {
 434                                 /* TS discontinuity handling: */
 435                                 printk(KERN_WARNING "%lu: TS discontinuity: got %#x, "
 436                                        "expected %#x.\n", priv->ts_count, ts[3] & 0x0F, priv->tscc);
 437                                 /* Drop partly decoded SNDU, reset state, resync on PUSI. */
 438                                 if (priv->ule_skb) {
 439                                         dev_kfree_skb( priv->ule_skb );
 440                                         /* Prepare for next SNDU. */
 441                                         // reset_ule(priv);  moved to below.
 442                                         dev->stats.rx_errors++;
 443                                         dev->stats.rx_frame_errors++;
 444                                 }
 445                                 reset_ule(priv);
 446                                 /* skip to next PUSI. */
 447                                 priv->need_pusi = 1;
 448                                 continue;
 449                         }
 450                         /* If we still have an incomplete payload, but PUSI is
 451                          * set; some TS cells are missing.
 452                          * This is only possible here, if we missed exactly 16 TS
 453                          * cells (continuity counter wrap). */
 454                         if (ts[1] & TS_PUSI) {
 455                                 if (! priv->need_pusi) {
 456                                         if (!(*from_where < (ts_remain-1)) || *from_where != priv->ule_sndu_remain) {
 457                                                 /* Pointer field is invalid.  Drop this TS cell and any started ULE SNDU. */
 458                                                 printk(KERN_WARNING "%lu: Invalid pointer "
 459                                                        "field: %u.\n", priv->ts_count, *from_where);
 460
 461                                                 /* Drop partly decoded SNDU, reset state, resync on PUSI. */
 462                                                 if (priv->ule_skb) {
 463                                                         dev_kfree_skb( priv->ule_skb );
 464                                                         dev->stats.rx_errors++;
 465                                                         dev->stats.rx_frame_errors++;
 466                                                 }
 467                                                 reset_ule(priv);
 468                                                 priv->need_pusi = 1;
 469                                                 continue;
 470                                         }
 471                                         /* Skip pointer field (we're processing a
 472                                          * packed payload). */
 473                                         from_where += 1;
 474                                         ts_remain -= 1;
 475                                 } else
 476                                         priv->need_pusi = 0;
 477
 478                                 if (priv->ule_sndu_remain > 183) {
 479                                         /* Current SNDU lacks more data than there could be available in the
 480                                          * current TS cell. */
 481                                         dev->stats.rx_errors++;
 482                                         dev->stats.rx_length_errors++;
 483                                         printk(KERN_WARNING "%lu: Expected %d more SNDU bytes, but "
 484                                                "got PUSI (pf %d, ts_remain %d).  Flushing incomplete payload.\n",
 485                                                priv->ts_count, priv->ule_sndu_remain, ts[4], ts_remain);
 486                                         dev_kfree_skb(priv->ule_skb);
 487                                         /* Prepare for next SNDU. */
 488                                         reset_ule(priv);
 489                                         /* Resync: go to where pointer field points to: start of next ULE SNDU. */
 490                                         from_where += ts[4];
 491                                         ts_remain -= ts[4];
 492                                 }
 493                         }
 494                 }
 495
 496                 /* Check if new payload needs to be started. */
 497                 if (priv->ule_skb == NULL) {
 498                         /* Start a new payload with skb.
 499                          * Find ULE header.  It is only guaranteed that the
 500                          * length field (2 bytes) is contained in the current
 501                          * TS.
 502                          * Check ts_remain has to be >= 2 here. */
 503                         if (ts_remain < 2) {
 504                                 printk(KERN_WARNING "Invalid payload packing: only %d "
 505                                        "bytes left in TS.  Resyncing.\n", ts_remain);
 506                                 priv->ule_sndu_len = 0;
 507                                 priv->need_pusi = 1;
 508                                 ts += TS_SZ;
 509                                 continue;
 510                         }
 511
 512                         if (! priv->ule_sndu_len) {
 513                                 /* Got at least two bytes, thus extrace the SNDU length. */
 514                                 priv->ule_sndu_len = from_where[0] << 8 | from_where[1];
 515                                 if (priv->ule_sndu_len & 0x8000) {
 516                                         /* D-Bit is set: no dest mac present. */
 517                                         priv->ule_sndu_len &= 0x7FFF;
 518                                         priv->ule_dbit = 1;
 519                                 } else
 520                                         priv->ule_dbit = 0;
 521
 522                                 if (priv->ule_sndu_len < 5) {
 523                                         printk(KERN_WARNING "%lu: Invalid ULE SNDU length %u. "
 524                                                "Resyncing.\n", priv->ts_count, priv->ule_sndu_len);
 525                                         dev->stats.rx_errors++;
 526                                         dev->stats.rx_length_errors++;
 527                                         priv->ule_sndu_len = 0;
 528                                         priv->need_pusi = 1;
 529                                         new_ts = 1;
 530                                         ts += TS_SZ;
 531                                         priv->ts_count++;
 532                                         continue;
 533                                 }
 534                                 ts_remain -= 2; /* consume the 2 bytes SNDU length. */
 535                                 from_where += 2;
 536                         }
 537
 538                         /*
 539                          * State of current TS:
 540                          *   ts_remain (remaining bytes in the current TS cell)
 541                          *   0  ule_type is not available now, we need the next TS cell
 542                          *   1  the first byte of the ule_type is present
 543                          * >=2  full ULE header present, maybe some payload data as well.
 544                          */
 545                         switch (ts_remain) {
 546                                 case 1:
 547                                         priv->ule_sndu_type = from_where[0] << 8;
 548                                         priv->ule_sndu_type_1 = 1; /* first byte of ule_type is set. */
 549                                         ts_remain -= 1; from_where += 1;
 550                                         /* Continue w/ next TS. */
 551                                 case 0:
 552                                         new_ts = 1;
 553                                         ts += TS_SZ;
 554                                         priv->ts_count++;
 555                                         continue;
 556
 557                                 default: /* complete ULE header is present in current TS. */
 558                                         /* Extract ULE type field. */
 559                                         if (priv->ule_sndu_type_1) {
 560                                                 priv->ule_sndu_type |= from_where[0];
 561                                                 from_where += 1; /* points to payload start. */
 562                                                 ts_remain -= 1;
 563                                         } else {
 564                                                 /* Complete type is present in new TS. */
 565                                                 priv->ule_sndu_type = from_where[0] << 8 | from_where[1];
 566                                                 from_where += 2; /* points to payload start. */
 567                                                 ts_remain -= 2;
 568                                         }
 569                                         break;
 570                         }
 571
 572                         /* Allocate the skb (decoder target buffer) with the correct size, as follows:
 573                          * prepare for the largest case: bridged SNDU with MAC address (dbit = 0). */
 574                         priv->ule_skb = dev_alloc_skb( priv->ule_sndu_len + ETH_HLEN + ETH_ALEN );
 575                         if (priv->ule_skb == NULL) {
 576                                 printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n",
 577                                        dev->name);
 578                                 dev->stats.rx_dropped++;
 579                                 return;
 580                         }
 581
 582                         /* This includes the CRC32 _and_ dest mac, if !dbit. */
 583                         priv->ule_sndu_remain = priv->ule_sndu_len;
 584                         priv->ule_skb->dev = dev;
 585                         /* Leave space for Ethernet or bridged SNDU header (eth hdr plus one MAC addr). */
 586                         skb_reserve( priv->ule_skb, ETH_HLEN + ETH_ALEN );
 587                 }
 588
 589                 /* Copy data into our current skb. */
 590                 how_much = min(priv->ule_sndu_remain, (int)ts_remain);
 591                 memcpy(skb_put(priv->ule_skb, how_much), from_where, how_much);
 592                 priv->ule_sndu_remain -= how_much;
 593                 ts_remain -= how_much;
 594                 from_where += how_much;
 595
 596                 /* Check for complete payload. */
 597                 if (priv->ule_sndu_remain <= 0) {
 598                         /* Check CRC32, we've got it in our skb already. */
 599                         __be16 ulen = htons(priv->ule_sndu_len);
 600                         __be16 utype = htons(priv->ule_sndu_type);
 601                         const u8 *tail;
 602                         struct kvec iov[3] = {
 603                                 { &ulen, sizeof ulen },
 604                                 { &utype, sizeof utype },
 605                                 { priv->ule_skb->data, priv->ule_skb->len - 4 }
 606                         };
 607                         u32 ule_crc = ~0L, expected_crc;
 608                         if (priv->ule_dbit) {
 609                                 /* Set D-bit for CRC32 verification,
 610                                  * if it was set originally. */
 611                                 ulen |= htons(0x8000);
 612                         }
 613
 614                         ule_crc = iov_crc32(ule_crc, iov, 3);
 615                         tail = skb_tail_pointer(priv->ule_skb);
 616                         expected_crc = *(tail - 4) << 24 |
 617                                        *(tail - 3) << 16 |
 618                                        *(tail - 2) << 8 |
 619                                        *(tail - 1);
 620                         if (ule_crc != expected_crc) {
 621                                 printk(KERN_WARNING "%lu: CRC32 check FAILED: %08x / %08x, SNDU len %d type %#x, ts_remain %d, next 2: %x.\n",
 622                                        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);
 623
 624 #ifdef ULE_DEBUG
 625                                 hexdump( iov[0].iov_base, iov[0].iov_len );
 626                                 hexdump( iov[1].iov_base, iov[1].iov_len );
 627                                 hexdump( iov[2].iov_base, iov[2].iov_len );
 628
 629                                 if (ule_where == ule_hist) {
 630                                         hexdump( &ule_hist[98*TS_SZ], TS_SZ );
 631                                         hexdump( &ule_hist[99*TS_SZ], TS_SZ );
 632                                 } else if (ule_where == &ule_hist[TS_SZ]) {
 633                                         hexdump( &ule_hist[99*TS_SZ], TS_SZ );
 634                                         hexdump( ule_hist, TS_SZ );
 635                                 } else {
 636                                         hexdump( ule_where - TS_SZ - TS_SZ, TS_SZ );
 637                                         hexdump( ule_where - TS_SZ, TS_SZ );
 638                                 }
 639                                 ule_dump = 1;
 640 #endif
 641
 642                                 dev->stats.rx_errors++;
 643                                 dev->stats.rx_crc_errors++;
 644                                 dev_kfree_skb(priv->ule_skb);
 645                         } else {
 646                                 /* CRC32 verified OK. */
 647                                 u8 dest_addr[ETH_ALEN];
 648                                 static const u8 bc_addr[ETH_ALEN] =
 649                                         { [ 0 ... ETH_ALEN-1] = 0xff };
 650
 651                                 /* CRC32 was OK. Remove it from skb. */
 652                                 priv->ule_skb->tail -= 4;
 653                                 priv->ule_skb->len -= 4;
 654
 655                                 if (!priv->ule_dbit) {
 656                                         /*
 657                                          * The destination MAC address is the
 658                                          * next data in the skb.  It comes
 659                                          * before any extension headers.
 660                                          *
 661                                          * Check if the payload of this SNDU
 662                                          * should be passed up the stack.
 663                                          */
 664                                         register int drop = 0;
 665                                         if (priv->rx_mode != RX_MODE_PROMISC) {
 666                                                 if (priv->ule_skb->data[0] & 0x01) {
 667                                                         /* multicast or broadcast */
 668                                                         if (memcmp(priv->ule_skb->data, bc_addr, ETH_ALEN)) {
 669                                                                 /* multicast */
 670                                                                 if (priv->rx_mode == RX_MODE_MULTI) {
 671                                                                         int i;
 672                                                                         for(i = 0; i < priv->multi_num && memcmp(priv->ule_skb->data, priv->multi_macs[i], ETH_ALEN); i++)
 673                                                                                 ;
 674                                                                         if (i == priv->multi_num)
 675                                                                                 drop = 1;
 676                                                                 } else if (priv->rx_mode != RX_MODE_ALL_MULTI)
 677                                                                         drop = 1; /* no broadcast; */
 678                                                                 /* else: all multicast mode: accept all multicast packets */
 679                                                         }
 680                                                         /* else: broadcast */
 681                                                 }
 682                                                 else if (memcmp(priv->ule_skb->data, dev->dev_addr, ETH_ALEN))
 683                                                         drop = 1;
 684                                                 /* else: destination address matches the MAC address of our receiver device */
 685                                         }
 686                                         /* else: promiscuous mode; pass everything up the stack */
 687
 688                                         if (drop) {
 689 #ifdef ULE_DEBUG
 690                                                 dprintk("Dropping SNDU: MAC destination address does not match: dest addr: "MAC_ADDR_PRINTFMT", dev addr: "MAC_ADDR_PRINTFMT"\n",
 691                                                         MAX_ADDR_PRINTFMT_ARGS(priv->ule_skb->data), MAX_ADDR_PRINTFMT_ARGS(dev->dev_addr));
 692 #endif
 693                                                 dev_kfree_skb(priv->ule_skb);
 694                                                 goto sndu_done;
 695                                         }
 696                                         else
 697                                         {
 698                                                 skb_copy_from_linear_data(priv->ule_skb,
 699                                                               dest_addr,
 700                                                               ETH_ALEN);
 701                                                 skb_pull(priv->ule_skb, ETH_ALEN);
 702                                         }
 703                                 }
 704
 705                                 /* Handle ULE Extension Headers. */
 706                                 if (priv->ule_sndu_type < 1536) {
 707                                         /* There is an extension header.  Handle it accordingly. */
 708                                         int l = handle_ule_extensions(priv);
 709                                         if (l < 0) {
 710                                                 /* Mandatory extension header unknown or TEST SNDU.  Drop it. */
 711                                                 // printk( KERN_WARNING "Dropping SNDU, extension headers.\n" );
 712                                                 dev_kfree_skb(priv->ule_skb);
 713                                                 goto sndu_done;
 714                                         }
 715                                         skb_pull(priv->ule_skb, l);
 716                                 }
 717
 718                                 /*
 719                                  * Construct/assure correct ethernet header.
 720                                  * Note: in bridged mode (priv->ule_bridged !=
 721                                  * 0) we already have the (original) ethernet
 722                                  * header at the start of the payload (after
 723                                  * optional dest. address and any extension
 724                                  * headers).
 725                                  */
 726
 727                                 if (!priv->ule_bridged) {
 728                                         skb_push(priv->ule_skb, ETH_HLEN);
 729                                         ethh = (struct ethhdr *)priv->ule_skb->data;
 730                                         if (!priv->ule_dbit) {
 731                                                  /* dest_addr buffer is only valid if priv->ule_dbit == 0 */
 732                                                 memcpy(ethh->h_dest, dest_addr, ETH_ALEN);
 733                                                 memset(ethh->h_source, 0, ETH_ALEN);
 734                                         }
 735                                         else /* zeroize source and dest */
 736                                                 memset( ethh, 0, ETH_ALEN*2 );
 737
 738                                         ethh->h_proto = htons(priv->ule_sndu_type);
 739                                 }
 740                                 /* else:  skb is in correct state; nothing to do. */
 741                                 priv->ule_bridged = 0;
 742
 743                                 /* Stuff into kernel's protocol stack. */
 744                                 priv->ule_skb->protocol = dvb_net_eth_type_trans(priv->ule_skb, dev);
 745                                 /* If D-bit is set (i.e. destination MAC address not present),
 746                                  * receive the packet anyhow. */
 747                                 /* if (priv->ule_dbit && skb->pkt_type == PACKET_OTHERHOST)
 748                                         priv->ule_skb->pkt_type = PACKET_HOST; */
 749                                 dev->stats.rx_packets++;
 750                                 dev->stats.rx_bytes += priv->ule_skb->len;
 751                                 netif_rx(priv->ule_skb);
 752                         }
 753                         sndu_done:
 754                         /* Prepare for next SNDU. */
 755                         reset_ule(priv);
 756                 }
 757
 758                 /* More data in current TS (look at the bytes following the CRC32)? */
 759                 if (ts_remain >= 2 && *((unsigned short *)from_where) != 0xFFFF) {
 760                         /* Next ULE SNDU starts right there. */
 761                         new_ts = 0;
 762                         priv->ule_skb = NULL;
 763                         priv->ule_sndu_type_1 = 0;
 764                         priv->ule_sndu_len = 0;
 765                         // printk(KERN_WARNING "More data in current TS: [%#x %#x %#x %#x]\n",
 766                         //      *(from_where + 0), *(from_where + 1),
 767                         //      *(from_where + 2), *(from_where + 3));
 768                         // printk(KERN_WARNING "ts @ %p, stopped @ %p:\n", ts, from_where + 0);
 769                         // hexdump(ts, 188);
 770                 } else {
 771                         new_ts = 1;
 772                         ts += TS_SZ;
 773                         priv->ts_count++;
 774                         if (priv->ule_skb == NULL) {
 775                                 priv->need_pusi = 1;
 776                                 priv->ule_sndu_type_1 = 0;
 777                                 priv->ule_sndu_len = 0;
 778                         }
 779                 }
 780         }       /* for all available TS cells */
 781 }
 782
 783 static int dvb_net_ts_callback(const u8 *buffer1, size_t buffer1_len,
 784                                const u8 *buffer2, size_t buffer2_len,
 785                                struct dmx_ts_feed *feed, enum dmx_success success)
 786 {
 787         struct net_device *dev = feed->priv;
 788
 789         if (buffer2)
 790                 printk(KERN_WARNING "buffer2 not NULL: %p.\n", buffer2);
 791         if (buffer1_len > 32768)
 792                 printk(KERN_WARNING "length > 32k: %zu.\n", buffer1_len);
 793         /* printk("TS callback: %u bytes, %u TS cells @ %p.\n",
 794                   buffer1_len, buffer1_len / TS_SZ, buffer1); */
 795         dvb_net_ule(dev, buffer1, buffer1_len);
 796         return 0;
 797 }
 798
 799
 800 static void dvb_net_sec(struct net_device *dev,
 801                         const u8 *pkt, int pkt_len)
 802 {
 803         u8 *eth;
 804         struct sk_buff *skb;
 805         struct net_device_stats *stats = &dev->stats;
 806         int snap = 0;
 807
 808         /* note: pkt_len includes a 32bit checksum */
 809         if (pkt_len < 16) {
 810                 printk("%s: IP/MPE packet length = %d too small.\n",
 811                         dev->name, pkt_len);
 812                 stats->rx_errors++;
 813                 stats->rx_length_errors++;
 814                 return;
 815         }
 816 /* it seems some ISPs manage to screw up here, so we have to
 817  * relax the error checks... */
 818 #if 0
 819         if ((pkt[5] & 0xfd) != 0xc1) {
 820                 /* drop scrambled or broken packets */
 821 #else
 822         if ((pkt[5] & 0x3c) != 0x00) {
 823                 /* drop scrambled */
 824 #endif
 825                 stats->rx_errors++;
 826                 stats->rx_crc_errors++;
 827                 return;
 828         }
 829         if (pkt[5] & 0x02) {
 830                 /* handle LLC/SNAP, see rfc-1042 */
 831                 if (pkt_len < 24 || memcmp(&pkt[12], "\xaa\xaa\x03\0\0\0", 6)) {
 832                         stats->rx_dropped++;
 833                         return;
 834                 }
 835                 snap = 8;
 836         }
 837         if (pkt[7]) {
 838                 /* FIXME: assemble datagram from multiple sections */
 839                 stats->rx_errors++;
 840                 stats->rx_frame_errors++;
 841                 return;
 842         }
 843
 844         /* we have 14 byte ethernet header (ip header follows);
 845          * 12 byte MPE header; 4 byte checksum; + 2 byte alignment, 8 byte LLC/SNAP
 846          */
 847         if (!(skb = dev_alloc_skb(pkt_len - 4 - 12 + 14 + 2 - snap))) {
 848                 //printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n", dev->name);
 849                 stats->rx_dropped++;
 850                 return;
 851         }
 852         skb_reserve(skb, 2);    /* longword align L3 header */
 853         skb->dev = dev;
 854
 855         /* copy L3 payload */
 856         eth = (u8 *) skb_put(skb, pkt_len - 12 - 4 + 14 - snap);
 857         memcpy(eth + 14, pkt + 12 + snap, pkt_len - 12 - 4 - snap);
 858
 859         /* create ethernet header: */
 860         eth[0]=pkt[0x0b];
 861         eth[1]=pkt[0x0a];
 862         eth[2]=pkt[0x09];
 863         eth[3]=pkt[0x08];
 864         eth[4]=pkt[0x04];
 865         eth[5]=pkt[0x03];
 866
 867         eth[6]=eth[7]=eth[8]=eth[9]=eth[10]=eth[11]=0;
 868
 869         if (snap) {
 870                 eth[12] = pkt[18];
 871                 eth[13] = pkt[19];
 872         } else {
 873                 /* protocol numbers are from rfc-1700 or
 874                  * http://www.iana.org/assignments/ethernet-numbers
 875                  */
 876                 if (pkt[12] >> 4 == 6) { /* version field from IP header */
 877                         eth[12] = 0x86; /* IPv6 */
 878                         eth[13] = 0xdd;
 879                 } else {
 880                         eth[12] = 0x08; /* IPv4 */
 881                         eth[13] = 0x00;
 882                 }
 883         }
 884
 885         skb->protocol = dvb_net_eth_type_trans(skb, dev);
 886
 887         stats->rx_packets++;
 888         stats->rx_bytes+=skb->len;
 889         netif_rx(skb);
 890 }
 891
 892 static int dvb_net_sec_callback(const u8 *buffer1, size_t buffer1_len,
 893                  const u8 *buffer2, size_t buffer2_len,
 894                  struct dmx_section_filter *filter,
 895                  enum dmx_success success)
 896 {
 897         struct net_device *dev = filter->priv;
 898
 899         /**
 900          * we rely on the DVB API definition where exactly one complete
 901          * section is delivered in buffer1
 902          */
 903         dvb_net_sec (dev, buffer1, buffer1_len);
 904         return 0;
 905 }
 906
 907 static int dvb_net_tx(struct sk_buff *skb, struct net_device *dev)
 908 {
 909         dev_kfree_skb(skb);
 910         return NETDEV_TX_OK;
 911 }
 912
 913 static u8 mask_normal[6]={0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
 914 static u8 mask_allmulti[6]={0xff, 0xff, 0xff, 0x00, 0x00, 0x00};
 915 static u8 mac_allmulti[6]={0x01, 0x00, 0x5e, 0x00, 0x00, 0x00};
 916 static u8 mask_promisc[6]={0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
 917
 918 static int dvb_net_filter_sec_set(struct net_device *dev,
 919                    struct dmx_section_filter **secfilter,
 920                    u8 *mac, u8 *mac_mask)
 921 {
 922         struct dvb_net_priv *priv = netdev_priv(dev);
 923         int ret;
 924
 925         *secfilter=NULL;
 926         ret = priv->secfeed->allocate_filter(priv->secfeed, secfilter);
 927         if (ret<0) {
 928                 printk("%s: could not get filter\n", dev->name);
 929                 return ret;
 930         }
 931
 932         (*secfilter)->priv=(void *) dev;
 933
 934         memset((*secfilter)->filter_value, 0x00, DMX_MAX_FILTER_SIZE);
 935         memset((*secfilter)->filter_mask,  0x00, DMX_MAX_FILTER_SIZE);
 936         memset((*secfilter)->filter_mode,  0xff, DMX_MAX_FILTER_SIZE);
 937
 938         (*secfilter)->filter_value[0]=0x3e;
 939         (*secfilter)->filter_value[3]=mac[5];
 940         (*secfilter)->filter_value[4]=mac[4];
 941         (*secfilter)->filter_value[8]=mac[3];
 942         (*secfilter)->filter_value[9]=mac[2];
 943         (*secfilter)->filter_value[10]=mac[1];
 944         (*secfilter)->filter_value[11]=mac[0];
 945
 946         (*secfilter)->filter_mask[0] = 0xff;
 947         (*secfilter)->filter_mask[3] = mac_mask[5];
 948         (*secfilter)->filter_mask[4] = mac_mask[4];
 949         (*secfilter)->filter_mask[8] = mac_mask[3];
 950         (*secfilter)->filter_mask[9] = mac_mask[2];
 951         (*secfilter)->filter_mask[10] = mac_mask[1];
 952         (*secfilter)->filter_mask[11]=mac_mask[0];
 953
 954         dprintk("%s: filter mac=%pM\n", dev->name, mac);
 955         dprintk("%s: filter mask=%pM\n", dev->name, mac_mask);
 956
 957         return 0;
 958 }
 959
 960 static int dvb_net_feed_start(struct net_device *dev)
 961 {
 962         int ret = 0, i;
 963         struct dvb_net_priv *priv = netdev_priv(dev);
 964         struct dmx_demux *demux = priv->demux;
 965         unsigned char *mac = (unsigned char *) dev->dev_addr;
 966
 967         dprintk("%s: rx_mode %i\n", __func__, priv->rx_mode);
 968         mutex_lock(&priv->mutex);
 969         if (priv->tsfeed || priv->secfeed || priv->secfilter || priv->multi_secfilter[0])
 970                 printk("%s: BUG %d\n", __func__, __LINE__);
 971
 972         priv->secfeed=NULL;
 973         priv->secfilter=NULL;
 974         priv->tsfeed = NULL;
 975
 976         if (priv->feedtype == DVB_NET_FEEDTYPE_MPE) {
 977                 dprintk("%s: alloc secfeed\n", __func__);
 978                 ret=demux->allocate_section_feed(demux, &priv->secfeed,
 979                                          dvb_net_sec_callback);
 980                 if (ret<0) {
 981                         printk("%s: could not allocate section feed\n", dev->name);
 982                         goto error;
 983                 }
 984
 985                 ret = priv->secfeed->set(priv->secfeed, priv->pid, 32768, 1);
 986
 987                 if (ret<0) {
 988                         printk("%s: could not set section feed\n", dev->name);
 989                         priv->demux->release_section_feed(priv->demux, priv->secfeed);
 990                         priv->secfeed=NULL;
 991                         goto error;
 992                 }
 993
 994                 if (priv->rx_mode != RX_MODE_PROMISC) {
 995                         dprintk("%s: set secfilter\n", __func__);
 996                         dvb_net_filter_sec_set(dev, &priv->secfilter, mac, mask_normal);
 997                 }
 998
 999                 switch (priv->rx_mode) {
1000                 case RX_MODE_MULTI:
1001                         for (i = 0; i < priv->multi_num; i++) {
1002                                 dprintk("%s: set multi_secfilter[%d]\n", __func__, i);
1003                                 dvb_net_filter_sec_set(dev, &priv->multi_secfilter[i],
1004                                                        priv->multi_macs[i], mask_normal);
1005                         }
1006                         break;
1007                 case RX_MODE_ALL_MULTI:
1008                         priv->multi_num=1;
1009                         dprintk("%s: set multi_secfilter[0]\n", __func__);
1010                         dvb_net_filter_sec_set(dev, &priv->multi_secfilter[0],
1011                                                mac_allmulti, mask_allmulti);
1012                         break;
1013                 case RX_MODE_PROMISC:
1014                         priv->multi_num=0;
1015                         dprintk("%s: set secfilter\n", __func__);
1016                         dvb_net_filter_sec_set(dev, &priv->secfilter, mac, mask_promisc);
1017                         break;
1018                 }
1019
1020                 dprintk("%s: start filtering\n", __func__);
1021                 priv->secfeed->start_filtering(priv->secfeed);
1022         } else if (priv->feedtype == DVB_NET_FEEDTYPE_ULE) {
1023                 struct timespec timeout = { 0, 10000000 }; // 10 msec
1024
1025                 /* we have payloads encapsulated in TS */
1026                 dprintk("%s: alloc tsfeed\n", __func__);
1027                 ret = demux->allocate_ts_feed(demux, &priv->tsfeed, dvb_net_ts_callback);
1028                 if (ret < 0) {
1029                         printk("%s: could not allocate ts feed\n", dev->name);
1030                         goto error;
1031                 }
1032
1033                 /* Set netdevice pointer for ts decaps callback. */
1034                 priv->tsfeed->priv = (void *)dev;
1035                 ret = priv->tsfeed->set(priv->tsfeed,
1036                                         priv->pid, /* pid */
1037                                         TS_PACKET, /* type */
1038                                         DMX_TS_PES_OTHER, /* pes type */
1039                                         32768,     /* circular buffer size */
1040                                         timeout    /* timeout */
1041                                         );
1042
1043                 if (ret < 0) {
1044                         printk("%s: could not set ts feed\n", dev->name);
1045                         priv->demux->release_ts_feed(priv->demux, priv->tsfeed);
1046                         priv->tsfeed = NULL;
1047                         goto error;
1048                 }
1049
1050                 dprintk("%s: start filtering\n", __func__);
1051                 priv->tsfeed->start_filtering(priv->tsfeed);
1052         } else
1053                 ret = -EINVAL;
1054
1055 error:
1056         mutex_unlock(&priv->mutex);
1057         return ret;
1058 }
1059
1060 static int dvb_net_feed_stop(struct net_device *dev)
1061 {
1062         struct dvb_net_priv *priv = netdev_priv(dev);
1063         int i, ret = 0;
1064
1065         dprintk("%s\n", __func__);
1066         mutex_lock(&priv->mutex);
1067         if (priv->feedtype == DVB_NET_FEEDTYPE_MPE) {
1068                 if (priv->secfeed) {
1069                         if (priv->secfeed->is_filtering) {
1070                                 dprintk("%s: stop secfeed\n", __func__);
1071                                 priv->secfeed->stop_filtering(priv->secfeed);
1072                         }
1073
1074                         if (priv->secfilter) {
1075                                 dprintk("%s: release secfilter\n", __func__);
1076                                 priv->secfeed->release_filter(priv->secfeed,
1077                                                               priv->secfilter);
1078                                 priv->secfilter=NULL;
1079                         }
1080
1081                         for (i=0; i<priv->multi_num; i++) {
1082                                 if (priv->multi_secfilter[i]) {
1083                                         dprintk("%s: release multi_filter[%d]\n",
1084                                                 __func__, i);
1085                                         priv->secfeed->release_filter(priv->secfeed,
1086                                                                       priv->multi_secfilter[i]);
1087                                         priv->multi_secfilter[i] = NULL;
1088                                 }
1089                         }
1090
1091                         priv->demux->release_section_feed(priv->demux, priv->secfeed);
1092                         priv->secfeed = NULL;
1093                 } else
1094                         printk("%s: no feed to stop\n", dev->name);
1095         } else if (priv->feedtype == DVB_NET_FEEDTYPE_ULE) {
1096                 if (priv->tsfeed) {
1097                         if (priv->tsfeed->is_filtering) {
1098                                 dprintk("%s: stop tsfeed\n", __func__);
1099                                 priv->tsfeed->stop_filtering(priv->tsfeed);
1100                         }
1101                         priv->demux->release_ts_feed(priv->demux, priv->tsfeed);
1102                         priv->tsfeed = NULL;
1103                 }
1104                 else
1105                         printk("%s: no ts feed to stop\n", dev->name);
1106         } else
1107                 ret = -EINVAL;
1108         mutex_unlock(&priv->mutex);
1109         return ret;
1110 }
1111
1112
1113 static int dvb_set_mc_filter(struct net_device *dev, unsigned char *addr)
1114 {
1115         struct dvb_net_priv *priv = netdev_priv(dev);
1116
1117         if (priv->multi_num == DVB_NET_MULTICAST_MAX)
1118                 return -ENOMEM;
1119
1120         memcpy(priv->multi_macs[priv->multi_num], addr, ETH_ALEN);
1121
1122         priv->multi_num++;
1123         return 0;
1124 }
1125
1126
1127 static void wq_set_multicast_list (struct work_struct *work)
1128 {
1129         struct dvb_net_priv *priv =
1130                 container_of(work, struct dvb_net_priv, set_multicast_list_wq);
1131         struct net_device *dev = priv->net;
1132
1133         dvb_net_feed_stop(dev);
1134         priv->rx_mode = RX_MODE_UNI;
1135         netif_addr_lock_bh(dev);
1136
1137         if (dev->flags & IFF_PROMISC) {
1138                 dprintk("%s: promiscuous mode\n", dev->name);
1139                 priv->rx_mode = RX_MODE_PROMISC;
1140         } else if ((dev->flags & IFF_ALLMULTI)) {
1141                 dprintk("%s: allmulti mode\n", dev->name);
1142                 priv->rx_mode = RX_MODE_ALL_MULTI;
1143         } else if (!netdev_mc_empty(dev)) {
1144                 struct netdev_hw_addr *ha;
1145
1146                 dprintk("%s: set_mc_list, %d entries\n",
1147                         dev->name, netdev_mc_count(dev));
1148
1149                 priv->rx_mode = RX_MODE_MULTI;
1150                 priv->multi_num = 0;
1151
1152                 netdev_for_each_mc_addr(ha, dev)
1153                         dvb_set_mc_filter(dev, ha->addr);
1154         }
1155
1156         netif_addr_unlock_bh(dev);
1157         dvb_net_feed_start(dev);
1158 }
1159
1160
1161 static void dvb_net_set_multicast_list (struct net_device *dev)
1162 {
1163         struct dvb_net_priv *priv = netdev_priv(dev);
1164         schedule_work(&priv->set_multicast_list_wq);
1165 }
1166
1167
1168 static void wq_restart_net_feed (struct work_struct *work)
1169 {
1170         struct dvb_net_priv *priv =
1171                 container_of(work, struct dvb_net_priv, restart_net_feed_wq);
1172         struct net_device *dev = priv->net;
1173
1174         if (netif_running(dev)) {
1175                 dvb_net_feed_stop(dev);
1176                 dvb_net_feed_start(dev);
1177         }
1178 }
1179
1180
1181 static int dvb_net_set_mac (struct net_device *dev, void *p)
1182 {
1183         struct dvb_net_priv *priv = netdev_priv(dev);
1184         struct sockaddr *addr=p;
1185
1186         memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1187
1188         if (netif_running(dev))
1189                 schedule_work(&priv->restart_net_feed_wq);
1190
1191         return 0;
1192 }
1193
1194
1195 static int dvb_net_open(struct net_device *dev)
1196 {
1197         struct dvb_net_priv *priv = netdev_priv(dev);
1198
1199         priv->in_use++;
1200         dvb_net_feed_start(dev);
1201         return 0;
1202 }
1203
1204
1205 static int dvb_net_stop(struct net_device *dev)
1206 {
1207         struct dvb_net_priv *priv = netdev_priv(dev);
1208
1209         priv->in_use--;
1210         return dvb_net_feed_stop(dev);
1211 }
1212
1213 static const struct header_ops dvb_header_ops = {
1214         .create         = eth_header,
1215         .parse          = eth_header_parse,
1216         .rebuild        = eth_rebuild_header,
1217 };
1218
1219
1220 static const struct net_device_ops dvb_netdev_ops = {
1221         .ndo_open               = dvb_net_open,
1222         .ndo_stop               = dvb_net_stop,
1223         .ndo_start_xmit         = dvb_net_tx,
1224         .ndo_set_multicast_list = dvb_net_set_multicast_list,
1225         .ndo_set_mac_address    = dvb_net_set_mac,
1226         .ndo_change_mtu         = eth_change_mtu,
1227         .ndo_validate_addr      = eth_validate_addr,
1228 };
1229
1230 static void dvb_net_setup(struct net_device *dev)
1231 {
1232         ether_setup(dev);
1233
1234         dev->header_ops         = &dvb_header_ops;
1235         dev->netdev_ops         = &dvb_netdev_ops;
1236         dev->mtu                = 4096;
1237
1238         dev->flags |= IFF_NOARP;
1239 }
1240
1241 static int get_if(struct dvb_net *dvbnet)
1242 {
1243         int i;
1244
1245         for (i=0; i<DVB_NET_DEVICES_MAX; i++)
1246                 if (!dvbnet->state[i])
1247                         break;
1248
1249         if (i == DVB_NET_DEVICES_MAX)
1250                 return -1;
1251
1252         dvbnet->state[i]=1;
1253         return i;
1254 }
1255
1256 static int dvb_net_add_if(struct dvb_net *dvbnet, u16 pid, u8 feedtype)
1257 {
1258         struct net_device *net;
1259         struct dvb_net_priv *priv;
1260         int result;
1261         int if_num;
1262
1263         if (feedtype != DVB_NET_FEEDTYPE_MPE && feedtype != DVB_NET_FEEDTYPE_ULE)
1264                 return -EINVAL;
1265         if ((if_num = get_if(dvbnet)) < 0)
1266                 return -EINVAL;
1267
1268         net = alloc_netdev(sizeof(struct dvb_net_priv), "dvb", dvb_net_setup);
1269         if (!net)
1270                 return -ENOMEM;
1271
1272         if (dvbnet->dvbdev->id)
1273                 snprintf(net->name, IFNAMSIZ, "dvb%d%u%d",
1274                          dvbnet->dvbdev->adapter->num, dvbnet->dvbdev->id, if_num);
1275         else
1276                 /* compatibility fix to keep dvb0_0 format */
1277                 snprintf(net->name, IFNAMSIZ, "dvb%d_%d",
1278                          dvbnet->dvbdev->adapter->num, if_num);
1279
1280         net->addr_len = 6;
1281         memcpy(net->dev_addr, dvbnet->dvbdev->adapter->proposed_mac, 6);
1282
1283         dvbnet->device[if_num] = net;
1284
1285         priv = netdev_priv(net);
1286         priv->net = net;
1287         priv->demux = dvbnet->demux;
1288         priv->pid = pid;
1289         priv->rx_mode = RX_MODE_UNI;
1290         priv->need_pusi = 1;
1291         priv->tscc = 0;
1292         priv->feedtype = feedtype;
1293         reset_ule(priv);
1294
1295         INIT_WORK(&priv->set_multicast_list_wq, wq_set_multicast_list);
1296         INIT_WORK(&priv->restart_net_feed_wq, wq_restart_net_feed);
1297         mutex_init(&priv->mutex);
1298
1299         net->base_addr = pid;
1300
1301         if ((result = register_netdev(net)) < 0) {
1302                 dvbnet->device[if_num] = NULL;
1303                 free_netdev(net);
1304                 return result;
1305         }
1306         printk("dvb_net: created network interface %s\n", net->name);
1307
1308         return if_num;
1309 }
1310
1311 static int dvb_net_remove_if(struct dvb_net *dvbnet, unsigned long num)
1312 {
1313         struct net_device *net = dvbnet->device[num];
1314         struct dvb_net_priv *priv;
1315
1316         if (!dvbnet->state[num])
1317                 return -EINVAL;
1318         priv = netdev_priv(net);
1319         if (priv->in_use)
1320                 return -EBUSY;
1321
1322         dvb_net_stop(net);
1323         flush_scheduled_work();
1324         printk("dvb_net: removed network interface %s\n", net->name);
1325         unregister_netdev(net);
1326         dvbnet->state[num]=0;
1327         dvbnet->device[num] = NULL;
1328         free_netdev(net);
1329
1330         return 0;
1331 }
1332
1333 static int dvb_net_do_ioctl(struct file *file,
1334                   unsigned int cmd, void *parg)
1335 {
1336         struct dvb_device *dvbdev = file->private_data;
1337         struct dvb_net *dvbnet = dvbdev->priv;
1338
1339         if (((file->f_flags&O_ACCMODE)==O_RDONLY))
1340                 return -EPERM;
1341
1342         switch (cmd) {
1343         case NET_ADD_IF:
1344         {
1345                 struct dvb_net_if *dvbnetif = parg;
1346                 int result;
1347
1348                 if (!capable(CAP_SYS_ADMIN))
1349                         return -EPERM;
1350
1351                 if (!try_module_get(dvbdev->adapter->module))
1352                         return -EPERM;
1353
1354                 result=dvb_net_add_if(dvbnet, dvbnetif->pid, dvbnetif->feedtype);
1355                 if (result<0) {
1356                         module_put(dvbdev->adapter->module);
1357                         return result;
1358                 }
1359                 dvbnetif->if_num=result;
1360                 break;
1361         }
1362         case NET_GET_IF:
1363         {
1364                 struct net_device *netdev;
1365                 struct dvb_net_priv *priv_data;
1366                 struct dvb_net_if *dvbnetif = parg;
1367
1368                 if (dvbnetif->if_num >= DVB_NET_DEVICES_MAX ||
1369                     !dvbnet->state[dvbnetif->if_num])
1370                         return -EINVAL;
1371
1372                 netdev = dvbnet->device[dvbnetif->if_num];
1373
1374                 priv_data = netdev_priv(netdev);
1375                 dvbnetif->pid=priv_data->pid;
1376                 dvbnetif->feedtype=priv_data->feedtype;
1377                 break;
1378         }
1379         case NET_REMOVE_IF:
1380         {
1381                 int ret;
1382
1383                 if (!capable(CAP_SYS_ADMIN))
1384                         return -EPERM;
1385                 if ((unsigned long) parg >= DVB_NET_DEVICES_MAX)
1386                         return -EINVAL;
1387                 ret = dvb_net_remove_if(dvbnet, (unsigned long) parg);
1388                 if (!ret)
1389                         module_put(dvbdev->adapter->module);
1390                 return ret;
1391         }
1392
1393         /* binary compatibility cruft */
1394         case __NET_ADD_IF_OLD:
1395         {
1396                 struct __dvb_net_if_old *dvbnetif = parg;
1397                 int result;
1398
1399                 if (!capable(CAP_SYS_ADMIN))
1400                         return -EPERM;
1401
1402                 if (!try_module_get(dvbdev->adapter->module))
1403                         return -EPERM;
1404
1405                 result=dvb_net_add_if(dvbnet, dvbnetif->pid, DVB_NET_FEEDTYPE_MPE);
1406                 if (result<0) {
1407                         module_put(dvbdev->adapter->module);
1408                         return result;
1409                 }
1410                 dvbnetif->if_num=result;
1411                 break;
1412         }
1413         case __NET_GET_IF_OLD:
1414         {
1415                 struct net_device *netdev;
1416                 struct dvb_net_priv *priv_data;
1417                 struct __dvb_net_if_old *dvbnetif = parg;
1418
1419                 if (dvbnetif->if_num >= DVB_NET_DEVICES_MAX ||
1420                     !dvbnet->state[dvbnetif->if_num])
1421                         return -EINVAL;
1422
1423                 netdev = dvbnet->device[dvbnetif->if_num];
1424
1425                 priv_data = netdev_priv(netdev);
1426                 dvbnetif->pid=priv_data->pid;
1427                 break;
1428         }
1429         default:
1430                 return -ENOTTY;
1431         }
1432         return 0;
1433 }
1434
1435 static long dvb_net_ioctl(struct file *file,
1436               unsigned int cmd, unsigned long arg)
1437 {
1438         int ret;
1439
1440         lock_kernel();
1441         ret = dvb_usercopy(file, cmd, arg, dvb_net_do_ioctl);
1442         unlock_kernel();
1443
1444         return ret;
1445 }
1446
1447 static int dvb_net_close(struct inode *inode, struct file *file)
1448 {
1449         struct dvb_device *dvbdev = file->private_data;
1450         struct dvb_net *dvbnet = dvbdev->priv;
1451
1452         dvb_generic_release(inode, file);
1453
1454         if(dvbdev->users == 1 && dvbnet->exit == 1) {
1455                 fops_put(file->f_op);
1456                 file->f_op = NULL;
1457                 wake_up(&dvbdev->wait_queue);
1458         }
1459         return 0;
1460 }
1461
1462
1463 static const struct file_operations dvb_net_fops = {
1464         .owner = THIS_MODULE,
1465         .unlocked_ioctl = dvb_net_ioctl,
1466         .open = dvb_generic_open,
1467         .release = dvb_net_close,
1468 };
1469
1470 static struct dvb_device dvbdev_net = {
1471         .priv = NULL,
1472         .users = 1,
1473         .writers = 1,
1474         .fops = &dvb_net_fops,
1475 };
1476
1477
1478 void dvb_net_release (struct dvb_net *dvbnet)
1479 {
1480         int i;
1481
1482         dvbnet->exit = 1;
1483         if (dvbnet->dvbdev->users < 1)
1484                 wait_event(dvbnet->dvbdev->wait_queue,
1485                                 dvbnet->dvbdev->users==1);
1486
1487         dvb_unregister_device(dvbnet->dvbdev);
1488
1489         for (i=0; i<DVB_NET_DEVICES_MAX; i++) {
1490                 if (!dvbnet->state[i])
1491                         continue;
1492                 dvb_net_remove_if(dvbnet, i);
1493         }
1494 }
1495 EXPORT_SYMBOL(dvb_net_release);
1496
1497
1498 int dvb_net_init (struct dvb_adapter *adap, struct dvb_net *dvbnet,
1499                   struct dmx_demux *dmx)
1500 {
1501         int i;
1502
1503         dvbnet->demux = dmx;
1504
1505         for (i=0; i<DVB_NET_DEVICES_MAX; i++)
1506                 dvbnet->state[i] = 0;
1507
1508         dvb_register_device (adap, &dvbnet->dvbdev, &dvbdev_net,
1509                              dvbnet, DVB_DEVICE_NET);
1510
1511         return 0;
1512 }
1513 EXPORT_SYMBOL(dvb_net_init);