SAFE public projects git trees. - safe/jmp/linux-2.6/blob - drivers/media/dvb/dvb-core/dvb_net.c

   1 /*
   2  * dvb_net.c
   3  *
   4  * Copyright (C) 2001 Convergence integrated media GmbH
   5  *                    Ralph Metzler <ralph@convergence.de>
   6  * Copyright (C) 2002 Ralph Metzler <rjkm@metzlerbros.de>
   7  *
   8  * ULE Decapsulation code:
   9  * Copyright (C) 2003, 2004 gcs - Global Communication & Services GmbH.
  10  *                      and Department of Scientific Computing
  11  *                          Paris Lodron University of Salzburg.
  12  *                          Hilmar Linder <hlinder@cosy.sbg.ac.at>
  13  *                      and Wolfram Stering <wstering@cosy.sbg.ac.at>
  14  *
  15  * ULE Decaps according to RFC 4326.
  16  *
  17  * This program is free software; you can redistribute it and/or
  18  * modify it under the terms of the GNU General Public License
  19  * as published by the Free Software Foundation; either version 2
  20  * of the License, or (at your option) any later version.
  21  *
  22  * This program is distributed in the hope that it will be useful,
  23  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  24  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  25  * GNU General Public License for more details.
  26  *
  27  * You should have received a copy of the GNU General Public License
  28  * along with this program; if not, write to the Free Software
  29  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  30  * Or, point your browser to http://www.gnu.org/copyleft/gpl.html
  31  */
  32
  33 /*
  34  * ULE ChangeLog:
  35  * Feb 2004: hl/ws v1: Implementing draft-fair-ipdvb-ule-01.txt
  36  *
  37  * Dec 2004: hl/ws v2: Implementing draft-ietf-ipdvb-ule-03.txt:
  38  *                       ULE Extension header handling.
  39  *                     Bugreports by Moritz Vieth and Hanno Tersteegen,
  40  *                       Fraunhofer Institute for Open Communication Systems
  41  *                       Competence Center for Advanced Satellite Communications.
  42  *                     Bugfixes and robustness improvements.
  43  *                     Filtering on dest MAC addresses, if present (D-Bit = 0)
  44  *                     ULE_DEBUG compile-time option.
  45  * Apr 2006: cp v3:    Bugfixes and compliency with RFC 4326 (ULE) by
  46  *                       Christian Praehauser <cpraehaus@cosy.sbg.ac.at>,
  47  *                       Paris Lodron University of Salzburg.
  48  */
  49
  50 /*
  51  * FIXME / TODO (dvb_net.c):
  52  *
  53  * Unloading does not work for 2.6.9 kernels: a refcount doesn't go to zero.
  54  *
  55  */
  56
  57 #include <linux/module.h>
  58 #include <linux/kernel.h>
  59 #include <linux/netdevice.h>
  60 #include <linux/etherdevice.h>
  61 #include <linux/dvb/net.h>
  62 #include <linux/uio.h>
  63 #include <asm/uaccess.h>
  64 #include <linux/crc32.h>
  65 #include <linux/mutex.h>
  66
  67 #include "dvb_demux.h"
  68 #include "dvb_net.h"
  69
  70 static int dvb_net_debug;
  71 module_param(dvb_net_debug, int, 0444);
  72 MODULE_PARM_DESC(dvb_net_debug, "enable debug messages");
  73
  74 #define dprintk(x...) do { if (dvb_net_debug) printk(x); } while (0)
  75
  76
  77 static inline __u32 iov_crc32( __u32 c, struct kvec *iov, unsigned int cnt )
  78 {
  79         unsigned int j;
  80         for (j = 0; j < cnt; j++)
  81                 c = crc32_be( c, iov[j].iov_base, iov[j].iov_len );
  82         return c;
  83 }
  84
  85
  86 #define DVB_NET_MULTICAST_MAX 10
  87
  88 #undef ULE_DEBUG
  89
  90 #ifdef ULE_DEBUG
  91
  92 #define MAC_ADDR_PRINTFMT "%.2x:%.2x:%.2x:%.2x:%.2x:%.2x"
  93 #define MAX_ADDR_PRINTFMT_ARGS(macap) (macap)[0],(macap)[1],(macap)[2],(macap)[3],(macap)[4],(macap)[5]
  94
  95 #define isprint(c)      ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || (c >= '0' && c <= '9'))
  96
  97 static void hexdump( const unsigned char *buf, unsigned short len )
  98 {
  99         char str[80], octet[10];
 100         int ofs, i, l;
 101
 102         for (ofs = 0; ofs < len; ofs += 16) {
 103                 sprintf( str, "%03d: ", ofs );
 104
 105                 for (i = 0; i < 16; i++) {
 106                         if ((i + ofs) < len)
 107                                 sprintf( octet, "%02x ", buf[ofs + i] );
 108                         else
 109                                 strcpy( octet, "   " );
 110
 111                         strcat( str, octet );
 112                 }
 113                 strcat( str, "  " );
 114                 l = strlen( str );
 115
 116                 for (i = 0; (i < 16) && ((i + ofs) < len); i++)
 117                         str[l++] = isprint( buf[ofs + i] ) ? buf[ofs + i] : '.';
 118
 119                 str[l] = '\0';
 120                 printk( KERN_WARNING "%s\n", str );
 121         }
 122 }
 123
 124 #endif
 125
 126 struct dvb_net_priv {
 127         int in_use;
 128         struct net_device_stats stats;
 129         u16 pid;
 130         struct dvb_net *host;
 131         struct dmx_demux *demux;
 132         struct dmx_section_feed *secfeed;
 133         struct dmx_section_filter *secfilter;
 134         struct dmx_ts_feed *tsfeed;
 135         int multi_num;
 136         struct dmx_section_filter *multi_secfilter[DVB_NET_MULTICAST_MAX];
 137         unsigned char multi_macs[DVB_NET_MULTICAST_MAX][6];
 138         int rx_mode;
 139 #define RX_MODE_UNI 0
 140 #define RX_MODE_MULTI 1
 141 #define RX_MODE_ALL_MULTI 2
 142 #define RX_MODE_PROMISC 3
 143         struct work_struct set_multicast_list_wq;
 144         struct work_struct restart_net_feed_wq;
 145         unsigned char feedtype;                 /* Either FEED_TYPE_ or FEED_TYPE_ULE */
 146         int need_pusi;                          /* Set to 1, if synchronization on PUSI required. */
 147         unsigned char tscc;                     /* TS continuity counter after sync on PUSI. */
 148         struct sk_buff *ule_skb;                /* ULE SNDU decodes into this buffer. */
 149         unsigned char *ule_next_hdr;            /* Pointer into skb to next ULE extension header. */
 150         unsigned short ule_sndu_len;            /* ULE SNDU length in bytes, w/o D-Bit. */
 151         unsigned short ule_sndu_type;           /* ULE SNDU type field, complete. */
 152         unsigned char ule_sndu_type_1;          /* ULE SNDU type field, if split across 2 TS cells. */
 153         unsigned char ule_dbit;                 /* Whether the DestMAC address present
 154                                                  * or not (bit is set). */
 155         unsigned char ule_bridged;              /* Whether the ULE_BRIDGED extension header was found. */
 156         int ule_sndu_remain;                    /* Nr. of bytes still required for current ULE SNDU. */
 157         unsigned long ts_count;                 /* Current ts cell counter. */
 158         struct mutex mutex;
 159 };
 160
 161
 162 /**
 163  *      Determine the packet's protocol ID. The rule here is that we
 164  *      assume 802.3 if the type field is short enough to be a length.
 165  *      This is normal practice and works for any 'now in use' protocol.
 166  *
 167  *  stolen from eth.c out of the linux kernel, hacked for dvb-device
 168  *  by Michael Holzt <kju@debian.org>
 169  */
 170 static unsigned short dvb_net_eth_type_trans(struct sk_buff *skb,
 171                                       struct net_device *dev)
 172 {
 173         struct ethhdr *eth;
 174         unsigned char *rawp;
 175
 176         skb->mac.raw=skb->data;
 177         skb_pull(skb,dev->hard_header_len);
 178         eth = eth_hdr(skb);
 179
 180         if (*eth->h_dest & 1) {
 181                 if(memcmp(eth->h_dest,dev->broadcast, ETH_ALEN)==0)
 182                         skb->pkt_type=PACKET_BROADCAST;
 183                 else
 184                         skb->pkt_type=PACKET_MULTICAST;
 185         }
 186
 187         if (ntohs(eth->h_proto) >= 1536)
 188                 return eth->h_proto;
 189
 190         rawp = skb->data;
 191
 192         /**
 193          *      This is a magic hack to spot IPX packets. Older Novell breaks
 194          *      the protocol design and runs IPX over 802.3 without an 802.2 LLC
 195          *      layer. We look for FFFF which isn't a used 802.2 SSAP/DSAP. This
 196          *      won't work for fault tolerant netware but does for the rest.
 197          */
 198         if (*(unsigned short *)rawp == 0xFFFF)
 199                 return htons(ETH_P_802_3);
 200
 201         /**
 202          *      Real 802.2 LLC
 203          */
 204         return htons(ETH_P_802_2);
 205 }
 206
 207 #define TS_SZ   188
 208 #define TS_SYNC 0x47
 209 #define TS_TEI  0x80
 210 #define TS_SC   0xC0
 211 #define TS_PUSI 0x40
 212 #define TS_AF_A 0x20
 213 #define TS_AF_D 0x10
 214
 215 /* ULE Extension Header handlers. */
 216
 217 #define ULE_TEST        0
 218 #define ULE_BRIDGED     1
 219
 220 #define ULE_OPTEXTHDR_PADDING 0
 221
 222 static int ule_test_sndu( struct dvb_net_priv *p )
 223 {
 224         return -1;
 225 }
 226
 227 static int ule_bridged_sndu( struct dvb_net_priv *p )
 228 {
 229         struct ethhdr *hdr = (struct ethhdr*) p->ule_next_hdr;
 230         if(ntohs(hdr->h_proto) < 1536) {
 231                 int framelen = p->ule_sndu_len - ((p->ule_next_hdr+sizeof(struct ethhdr)) - p->ule_skb->data);
 232                 /* A frame Type < 1536 for a bridged frame, introduces a LLC Length field. */
 233                 if(framelen != ntohs(hdr->h_proto)) {
 234                         return -1;
 235                 }
 236         }
 237         /* Note:
 238          * From RFC4326:
 239          *  "A bridged SNDU is a Mandatory Extension Header of Type 1.
 240          *   It must be the final (or only) extension header specified in the header chain of a SNDU."
 241          * The 'ule_bridged' flag will cause the extension header processing loop to terminate.
 242          */
 243         p->ule_bridged = 1;
 244         return 0;
 245 }
 246
 247 static int ule_exthdr_padding(struct dvb_net_priv *p)
 248 {
 249         return 0;
 250 }
 251
 252 /** Handle ULE extension headers.
 253  *  Function is called after a successful CRC32 verification of an ULE SNDU to complete its decoding.
 254  *  Returns: >= 0: nr. of bytes consumed by next extension header
 255  *           -1:   Mandatory extension header that is not recognized or TEST SNDU; discard.
 256  */
 257 static int handle_one_ule_extension( struct dvb_net_priv *p )
 258 {
 259         /* Table of mandatory extension header handlers.  The header type is the index. */
 260         static int (*ule_mandatory_ext_handlers[255])( struct dvb_net_priv *p ) =
 261                 { [0] = ule_test_sndu, [1] = ule_bridged_sndu, [2] = NULL,  };
 262
 263         /* Table of optional extension header handlers.  The header type is the index. */
 264         static int (*ule_optional_ext_handlers[255])( struct dvb_net_priv *p ) =
 265                 { [0] = ule_exthdr_padding, [1] = NULL, };
 266
 267         int ext_len = 0;
 268         unsigned char hlen = (p->ule_sndu_type & 0x0700) >> 8;
 269         unsigned char htype = p->ule_sndu_type & 0x00FF;
 270
 271         /* Discriminate mandatory and optional extension headers. */
 272         if (hlen == 0) {
 273                 /* Mandatory extension header */
 274                 if (ule_mandatory_ext_handlers[htype]) {
 275                         ext_len = ule_mandatory_ext_handlers[htype]( p );
 276                         if(ext_len >= 0) {
 277                                 p->ule_next_hdr += ext_len;
 278                                 if (!p->ule_bridged) {
 279                                         p->ule_sndu_type = ntohs(*(unsigned short *)p->ule_next_hdr);
 280                                         p->ule_next_hdr += 2;
 281                                 } else {
 282                                         p->ule_sndu_type = ntohs(*(unsigned short *)(p->ule_next_hdr + ((p->ule_dbit ? 2 : 3) * ETH_ALEN)));
 283                                         /* This assures the extension handling loop will terminate. */
 284                                 }
 285                         }
 286                         // else: extension handler failed or SNDU should be discarded
 287                 } else
 288                         ext_len = -1;   /* SNDU has to be discarded. */
 289         } else {
 290                 /* Optional extension header.  Calculate the length. */
 291                 ext_len = hlen << 1;
 292                 /* Process the optional extension header according to its type. */
 293                 if (ule_optional_ext_handlers[htype])
 294                         (void)ule_optional_ext_handlers[htype]( p );
 295                 p->ule_next_hdr += ext_len;
 296                 p->ule_sndu_type = ntohs( *(unsigned short *)(p->ule_next_hdr-2) );
 297                 /*
 298                  * note: the length of the next header type is included in the
 299                  * length of THIS optional extension header
 300                  */
 301         }
 302
 303         return ext_len;
 304 }
 305
 306 static int handle_ule_extensions( struct dvb_net_priv *p )
 307 {
 308         int total_ext_len = 0, l;
 309
 310         p->ule_next_hdr = p->ule_skb->data;
 311         do {
 312                 l = handle_one_ule_extension( p );
 313                 if (l < 0)
 314                         return l;       /* Stop extension header processing and discard SNDU. */
 315                 total_ext_len += l;
 316 #ifdef ULE_DEBUG
 317                 dprintk("handle_ule_extensions: ule_next_hdr=%p, ule_sndu_type=%i, "
 318                         "l=%i, total_ext_len=%i\n", p->ule_next_hdr,
 319                         (int) p->ule_sndu_type, l, total_ext_len);
 320 #endif
 321
 322         } while (p->ule_sndu_type < 1536);
 323
 324         return total_ext_len;
 325 }
 326
 327
 328 /** Prepare for a new ULE SNDU: reset the decoder state. */
 329 static inline void reset_ule( struct dvb_net_priv *p )
 330 {
 331         p->ule_skb = NULL;
 332         p->ule_next_hdr = NULL;
 333         p->ule_sndu_len = 0;
 334         p->ule_sndu_type = 0;
 335         p->ule_sndu_type_1 = 0;
 336         p->ule_sndu_remain = 0;
 337         p->ule_dbit = 0xFF;
 338         p->ule_bridged = 0;
 339 }
 340
 341 /**
 342  * Decode ULE SNDUs according to draft-ietf-ipdvb-ule-03.txt from a sequence of
 343  * TS cells of a single PID.
 344  */
 345 static void dvb_net_ule( struct net_device *dev, const u8 *buf, size_t buf_len )
 346 {
 347         struct dvb_net_priv *priv = dev->priv;
 348         unsigned long skipped = 0L;
 349         u8 *ts, *ts_end, *from_where = NULL, ts_remain = 0, how_much = 0, new_ts = 1;
 350         struct ethhdr *ethh = NULL;
 351
 352 #ifdef ULE_DEBUG
 353         /* The code inside ULE_DEBUG keeps a history of the last 100 TS cells processed. */
 354         static unsigned char ule_hist[100*TS_SZ];
 355         static unsigned char *ule_where = ule_hist, ule_dump = 0;
 356 #endif
 357
 358         if (dev == NULL) {
 359                 printk( KERN_ERR "NO netdev struct!\n" );
 360                 return;
 361         }
 362
 363         /* For all TS cells in current buffer.
 364          * Appearently, we are called for every single TS cell.
 365          */
 366         for (ts = (char *)buf, ts_end = (char *)buf + buf_len; ts < ts_end; /* no default incr. */ ) {
 367
 368                 if (new_ts) {
 369                         /* We are about to process a new TS cell. */
 370
 371 #ifdef ULE_DEBUG
 372                         if (ule_where >= &ule_hist[100*TS_SZ]) ule_where = ule_hist;
 373                         memcpy( ule_where, ts, TS_SZ );
 374                         if (ule_dump) {
 375                                 hexdump( ule_where, TS_SZ );
 376                                 ule_dump = 0;
 377                         }
 378                         ule_where += TS_SZ;
 379 #endif
 380
 381                         /* Check TS error conditions: sync_byte, transport_error_indicator, scrambling_control . */
 382                         if ((ts[0] != TS_SYNC) || (ts[1] & TS_TEI) || ((ts[3] & TS_SC) != 0)) {
 383                                 printk(KERN_WARNING "%lu: Invalid TS cell: SYNC %#x, TEI %u, SC %#x.\n",
 384                                        priv->ts_count, ts[0], ts[1] & TS_TEI >> 7, ts[3] & 0xC0 >> 6);
 385
 386                                 /* Drop partly decoded SNDU, reset state, resync on PUSI. */
 387                                 if (priv->ule_skb) {
 388                                         dev_kfree_skb( priv->ule_skb );
 389                                         /* Prepare for next SNDU. */
 390                                         priv->stats.rx_errors++;
 391                                         priv->stats.rx_frame_errors++;
 392                                 }
 393                                 reset_ule(priv);
 394                                 priv->need_pusi = 1;
 395
 396                                 /* Continue with next TS cell. */
 397                                 ts += TS_SZ;
 398                                 priv->ts_count++;
 399                                 continue;
 400                         }
 401
 402                         ts_remain = 184;
 403                         from_where = ts + 4;
 404                 }
 405                 /* Synchronize on PUSI, if required. */
 406                 if (priv->need_pusi) {
 407                         if (ts[1] & TS_PUSI) {
 408                                 /* Find beginning of first ULE SNDU in current TS cell. */
 409                                 /* Synchronize continuity counter. */
 410                                 priv->tscc = ts[3] & 0x0F;
 411                                 /* There is a pointer field here. */
 412                                 if (ts[4] > ts_remain) {
 413                                         printk(KERN_ERR "%lu: Invalid ULE packet "
 414                                                "(pointer field %d)\n", priv->ts_count, ts[4]);
 415                                         ts += TS_SZ;
 416                                         priv->ts_count++;
 417                                         continue;
 418                                 }
 419                                 /* Skip to destination of pointer field. */
 420                                 from_where = &ts[5] + ts[4];
 421                                 ts_remain -= 1 + ts[4];
 422                                 skipped = 0;
 423                         } else {
 424                                 skipped++;
 425                                 ts += TS_SZ;
 426                                 priv->ts_count++;
 427                                 continue;
 428                         }
 429                 }
 430
 431                 if (new_ts) {
 432                         /* Check continuity counter. */
 433                         if ((ts[3] & 0x0F) == priv->tscc)
 434                                 priv->tscc = (priv->tscc + 1) & 0x0F;
 435                         else {
 436                                 /* TS discontinuity handling: */
 437                                 printk(KERN_WARNING "%lu: TS discontinuity: got %#x, "
 438                                        "expected %#x.\n", priv->ts_count, ts[3] & 0x0F, priv->tscc);
 439                                 /* Drop partly decoded SNDU, reset state, resync on PUSI. */
 440                                 if (priv->ule_skb) {
 441                                         dev_kfree_skb( priv->ule_skb );
 442                                         /* Prepare for next SNDU. */
 443                                         // reset_ule(priv);  moved to below.
 444                                         priv->stats.rx_errors++;
 445                                         priv->stats.rx_frame_errors++;
 446                                 }
 447                                 reset_ule(priv);
 448                                 /* skip to next PUSI. */
 449                                 priv->need_pusi = 1;
 450                                 continue;
 451                         }
 452                         /* If we still have an incomplete payload, but PUSI is
 453                          * set; some TS cells are missing.
 454                          * This is only possible here, if we missed exactly 16 TS
 455                          * cells (continuity counter wrap). */
 456                         if (ts[1] & TS_PUSI) {
 457                                 if (! priv->need_pusi) {
 458                                         if (!(*from_where < (ts_remain-1)) || *from_where != priv->ule_sndu_remain) {
 459                                                 /* Pointer field is invalid.  Drop this TS cell and any started ULE SNDU. */
 460                                                 printk(KERN_WARNING "%lu: Invalid pointer "
 461                                                        "field: %u.\n", priv->ts_count, *from_where);
 462
 463                                                 /* Drop partly decoded SNDU, reset state, resync on PUSI. */
 464                                                 if (priv->ule_skb) {
 465                                                         dev_kfree_skb( priv->ule_skb );
 466                                                         ((struct dvb_net_priv *) dev->priv)->stats.rx_errors++;
 467                                                         ((struct dvb_net_priv *) dev->priv)->stats.rx_frame_errors++;
 468                                                 }
 469                                                 reset_ule(priv);
 470                                                 priv->need_pusi = 1;
 471                                                 continue;
 472                                         }
 473                                         /* Skip pointer field (we're processing a
 474                                          * packed payload). */
 475                                         from_where += 1;
 476                                         ts_remain -= 1;
 477                                 } else
 478                                         priv->need_pusi = 0;
 479
 480                                 if (priv->ule_sndu_remain > 183) {
 481                                         /* Current SNDU lacks more data than there could be available in the
 482                                          * current TS cell. */
 483                                         priv->stats.rx_errors++;
 484                                         priv->stats.rx_length_errors++;
 485                                         printk(KERN_WARNING "%lu: Expected %d more SNDU bytes, but "
 486                                                "got PUSI (pf %d, ts_remain %d).  Flushing incomplete payload.\n",
 487                                                priv->ts_count, priv->ule_sndu_remain, ts[4], ts_remain);
 488                                         dev_kfree_skb(priv->ule_skb);
 489                                         /* Prepare for next SNDU. */
 490                                         reset_ule(priv);
 491                                         /* Resync: go to where pointer field points to: start of next ULE SNDU. */
 492                                         from_where += ts[4];
 493                                         ts_remain -= ts[4];
 494                                 }
 495                         }
 496                 }
 497
 498                 /* Check if new payload needs to be started. */
 499                 if (priv->ule_skb == NULL) {
 500                         /* Start a new payload with skb.
 501                          * Find ULE header.  It is only guaranteed that the
 502                          * length field (2 bytes) is contained in the current
 503                          * TS.
 504                          * Check ts_remain has to be >= 2 here. */
 505                         if (ts_remain < 2) {
 506                                 printk(KERN_WARNING "Invalid payload packing: only %d "
 507                                        "bytes left in TS.  Resyncing.\n", ts_remain);
 508                                 priv->ule_sndu_len = 0;
 509                                 priv->need_pusi = 1;
 510                                 continue;
 511                         }
 512
 513                         if (! priv->ule_sndu_len) {
 514                                 /* Got at least two bytes, thus extrace the SNDU length. */
 515                                 priv->ule_sndu_len = from_where[0] << 8 | from_where[1];
 516                                 if (priv->ule_sndu_len & 0x8000) {
 517                                         /* D-Bit is set: no dest mac present. */
 518                                         priv->ule_sndu_len &= 0x7FFF;
 519                                         priv->ule_dbit = 1;
 520                                 } else
 521                                         priv->ule_dbit = 0;
 522
 523                                 if (priv->ule_sndu_len < 5) {
 524                                         printk(KERN_WARNING "%lu: Invalid ULE SNDU length %u. "
 525                                                "Resyncing.\n", priv->ts_count, priv->ule_sndu_len);
 526                                         priv->stats.rx_errors++;
 527                                         priv->stats.rx_length_errors++;
 528                                         priv->ule_sndu_len = 0;
 529                                         priv->need_pusi = 1;
 530                                         new_ts = 1;
 531                                         ts += TS_SZ;
 532                                         priv->ts_count++;
 533                                         continue;
 534                                 }
 535                                 ts_remain -= 2; /* consume the 2 bytes SNDU length. */
 536                                 from_where += 2;
 537                         }
 538
 539                         /*
 540                          * State of current TS:
 541                          *   ts_remain (remaining bytes in the current TS cell)
 542                          *   0  ule_type is not available now, we need the next TS cell
 543                          *   1  the first byte of the ule_type is present
 544                          * >=2  full ULE header present, maybe some payload data as well.
 545                          */
 546                         switch (ts_remain) {
 547                                 case 1:
 548                                         priv->ule_sndu_type = from_where[0] << 8;
 549                                         priv->ule_sndu_type_1 = 1; /* first byte of ule_type is set. */
 550                                         ts_remain -= 1; from_where += 1;
 551                                         /* Continue w/ next TS. */
 552                                 case 0:
 553                                         new_ts = 1;
 554                                         ts += TS_SZ;
 555                                         priv->ts_count++;
 556                                         continue;
 557
 558                                 default: /* complete ULE header is present in current TS. */
 559                                         /* Extract ULE type field. */
 560                                         if (priv->ule_sndu_type_1) {
 561                                                 priv->ule_sndu_type |= from_where[0];
 562                                                 from_where += 1; /* points to payload start. */
 563                                                 ts_remain -= 1;
 564                                         } else {
 565                                                 /* Complete type is present in new TS. */
 566                                                 priv->ule_sndu_type = from_where[0] << 8 | from_where[1];
 567                                                 from_where += 2; /* points to payload start. */
 568                                                 ts_remain -= 2;
 569                                         }
 570                                         break;
 571                         }
 572
 573                         /* Allocate the skb (decoder target buffer) with the correct size, as follows:
 574                          * prepare for the largest case: bridged SNDU with MAC address (dbit = 0). */
 575                         priv->ule_skb = dev_alloc_skb( priv->ule_sndu_len + ETH_HLEN + ETH_ALEN );
 576                         if (priv->ule_skb == NULL) {
 577                                 printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n",
 578                                        dev->name);
 579                                 ((struct dvb_net_priv *)dev->priv)->stats.rx_dropped++;
 580                                 return;
 581                         }
 582
 583                         /* This includes the CRC32 _and_ dest mac, if !dbit. */
 584                         priv->ule_sndu_remain = priv->ule_sndu_len;
 585                         priv->ule_skb->dev = dev;
 586                         /* Leave space for Ethernet or bridged SNDU header (eth hdr plus one MAC addr). */
 587                         skb_reserve( priv->ule_skb, ETH_HLEN + ETH_ALEN );
 588                 }
 589
 590                 /* Copy data into our current skb. */
 591                 how_much = min(priv->ule_sndu_remain, (int)ts_remain);
 592                 memcpy(skb_put(priv->ule_skb, how_much), from_where, how_much);
 593                 priv->ule_sndu_remain -= how_much;
 594                 ts_remain -= how_much;
 595                 from_where += how_much;
 596
 597                 /* Check for complete payload. */
 598                 if (priv->ule_sndu_remain <= 0) {
 599                         /* Check CRC32, we've got it in our skb already. */
 600                         unsigned short ulen = htons(priv->ule_sndu_len);
 601                         unsigned short utype = htons(priv->ule_sndu_type);
 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                         unsigned long 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 |= 0x0080;
 612                         }
 613
 614                         ule_crc = iov_crc32(ule_crc, iov, 3);
 615                         expected_crc = *((u8 *)priv->ule_skb->tail - 4) << 24 |
 616                                        *((u8 *)priv->ule_skb->tail - 3) << 16 |
 617                                        *((u8 *)priv->ule_skb->tail - 2) << 8 |
 618                                        *((u8 *)priv->ule_skb->tail - 1);
 619                         if (ule_crc != expected_crc) {
 620                                 printk(KERN_WARNING "%lu: CRC32 check FAILED: %#lx / %#lx, SNDU len %d type %#x, ts_remain %d, next 2: %x.\n",
 621                                        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);
 622
 623 #ifdef ULE_DEBUG
 624                                 hexdump( iov[0].iov_base, iov[0].iov_len );
 625                                 hexdump( iov[1].iov_base, iov[1].iov_len );
 626                                 hexdump( iov[2].iov_base, iov[2].iov_len );
 627
 628                                 if (ule_where == ule_hist) {
 629                                         hexdump( &ule_hist[98*TS_SZ], TS_SZ );
 630                                         hexdump( &ule_hist[99*TS_SZ], TS_SZ );
 631                                 } else if (ule_where == &ule_hist[TS_SZ]) {
 632                                         hexdump( &ule_hist[99*TS_SZ], TS_SZ );
 633                                         hexdump( ule_hist, TS_SZ );
 634                                 } else {
 635                                         hexdump( ule_where - TS_SZ - TS_SZ, TS_SZ );
 636                                         hexdump( ule_where - TS_SZ, TS_SZ );
 637                                 }
 638                                 ule_dump = 1;
 639 #endif
 640
 641                                 priv->stats.rx_errors++;
 642                                 priv->stats.rx_crc_errors++;
 643                                 dev_kfree_skb(priv->ule_skb);
 644                         } else {
 645                                 /* CRC32 verified OK. */
 646                                 u8 dest_addr[ETH_ALEN];
 647                                 static const u8 bc_addr[ETH_ALEN] =
 648                                         { [ 0 ... ETH_ALEN-1] = 0xff };
 649
 650                                 /* CRC32 was OK. Remove it from skb. */
 651                                 priv->ule_skb->tail -= 4;
 652                                 priv->ule_skb->len -= 4;
 653
 654                                 if (!priv->ule_dbit) {
 655                                         /*
 656                                          * The destination MAC address is the
 657                                          * next data in the skb.  It comes
 658                                          * before any extension headers.
 659                                          *
 660                                          * Check if the payload of this SNDU
 661                                          * should be passed up the stack.
 662                                          */
 663                                         register int drop = 0;
 664                                         if (priv->rx_mode != RX_MODE_PROMISC) {
 665                                                 if (priv->ule_skb->data[0] & 0x01) {
 666                                                         /* multicast or broadcast */
 667                                                         if (memcmp(priv->ule_skb->data, bc_addr, ETH_ALEN)) {
 668                                                                 /* multicast */
 669                                                                 if (priv->rx_mode == RX_MODE_MULTI) {
 670                                                                         int i;
 671                                                                         for(i = 0; i < priv->multi_num && memcmp(priv->ule_skb->data, priv->multi_macs[i], ETH_ALEN); i++)
 672                                                                                 ;
 673                                                                         if (i == priv->multi_num)
 674                                                                                 drop = 1;
 675                                                                 } else if (priv->rx_mode != RX_MODE_ALL_MULTI)
 676                                                                         drop = 1; /* no broadcast; */
 677                                                                 /* else: all multicast mode: accept all multicast packets */
 678                                                         }
 679                                                         /* else: broadcast */
 680                                                 }
 681                                                 else if (memcmp(priv->ule_skb->data, dev->dev_addr, ETH_ALEN))
 682                                                         drop = 1;
 683                                                 /* else: destination address matches the MAC address of our receiver device */
 684                                         }
 685                                         /* else: promiscious mode; pass everything up the stack */
 686
 687                                         if (drop) {
 688 #ifdef ULE_DEBUG
 689                                                 dprintk("Dropping SNDU: MAC destination address does not match: dest addr: "MAC_ADDR_PRINTFMT", dev addr: "MAC_ADDR_PRINTFMT"\n",
 690                                                         MAX_ADDR_PRINTFMT_ARGS(priv->ule_skb->data), MAX_ADDR_PRINTFMT_ARGS(dev->dev_addr));
 691 #endif
 692                                                 dev_kfree_skb(priv->ule_skb);
 693                                                 goto sndu_done;
 694                                         }
 695                                         else
 696                                         {
 697                                                 memcpy(dest_addr,  priv->ule_skb->data, ETH_ALEN);
 698                                                 skb_pull(priv->ule_skb, ETH_ALEN);
 699                                         }
 700                                 }
 701
 702                                 /* Handle ULE Extension Headers. */
 703                                 if (priv->ule_sndu_type < 1536) {
 704                                         /* There is an extension header.  Handle it accordingly. */
 705                                         int l = handle_ule_extensions(priv);
 706                                         if (l < 0) {
 707                                                 /* Mandatory extension header unknown or TEST SNDU.  Drop it. */
 708                                                 // printk( KERN_WARNING "Dropping SNDU, extension headers.\n" );
 709                                                 dev_kfree_skb(priv->ule_skb);
 710                                                 goto sndu_done;
 711                                         }
 712                                         skb_pull(priv->ule_skb, l);
 713                                 }
 714
 715                                 /*
 716                                  * Construct/assure correct ethernet header.
 717                                  * Note: in bridged mode (priv->ule_bridged !=
 718                                  * 0) we already have the (original) ethernet
 719                                  * header at the start of the payload (after
 720                                  * optional dest. address and any extension
 721                                  * headers).
 722                                  */
 723
 724                                 if (!priv->ule_bridged) {
 725                                         skb_push(priv->ule_skb, ETH_HLEN);
 726                                         ethh = (struct ethhdr *)priv->ule_skb->data;
 727                                         if (!priv->ule_dbit) {
 728                                                  /* dest_addr buffer is only valid if priv->ule_dbit == 0 */
 729                                                 memcpy(ethh->h_dest, dest_addr, ETH_ALEN);
 730                                                 memset(ethh->h_source, 0, ETH_ALEN);
 731                                         }
 732                                         else /* zeroize source and dest */
 733                                                 memset( ethh, 0, ETH_ALEN*2 );
 734
 735                                         ethh->h_proto = htons(priv->ule_sndu_type);
 736                                 }
 737                                 /* else:  skb is in correct state; nothing to do. */
 738                                 priv->ule_bridged = 0;
 739
 740                                 /* Stuff into kernel's protocol stack. */
 741                                 priv->ule_skb->protocol = dvb_net_eth_type_trans(priv->ule_skb, dev);
 742                                 /* If D-bit is set (i.e. destination MAC address not present),
 743                                  * receive the packet anyhow. */
 744                                 /* if (priv->ule_dbit && skb->pkt_type == PACKET_OTHERHOST)
 745                                         priv->ule_skb->pkt_type = PACKET_HOST; */
 746                                 priv->stats.rx_packets++;
 747                                 priv->stats.rx_bytes += priv->ule_skb->len;
 748                                 netif_rx(priv->ule_skb);
 749                         }
 750                         sndu_done:
 751                         /* Prepare for next SNDU. */
 752                         reset_ule(priv);
 753                 }
 754
 755                 /* More data in current TS (look at the bytes following the CRC32)? */
 756                 if (ts_remain >= 2 && *((unsigned short *)from_where) != 0xFFFF) {
 757                         /* Next ULE SNDU starts right there. */
 758                         new_ts = 0;
 759                         priv->ule_skb = NULL;
 760                         priv->ule_sndu_type_1 = 0;
 761                         priv->ule_sndu_len = 0;
 762                         // printk(KERN_WARNING "More data in current TS: [%#x %#x %#x %#x]\n",
 763                         //      *(from_where + 0), *(from_where + 1),
 764                         //      *(from_where + 2), *(from_where + 3));
 765                         // printk(KERN_WARNING "ts @ %p, stopped @ %p:\n", ts, from_where + 0);
 766                         // hexdump(ts, 188);
 767                 } else {
 768                         new_ts = 1;
 769                         ts += TS_SZ;
 770                         priv->ts_count++;
 771                         if (priv->ule_skb == NULL) {
 772                                 priv->need_pusi = 1;
 773                                 priv->ule_sndu_type_1 = 0;
 774                                 priv->ule_sndu_len = 0;
 775                         }
 776                 }
 777         }       /* for all available TS cells */
 778 }
 779
 780 static int dvb_net_ts_callback(const u8 *buffer1, size_t buffer1_len,
 781                                const u8 *buffer2, size_t buffer2_len,
 782                                struct dmx_ts_feed *feed, enum dmx_success success)
 783 {
 784         struct net_device *dev = feed->priv;
 785
 786         if (buffer2 != 0)
 787                 printk(KERN_WARNING "buffer2 not 0: %p.\n", buffer2);
 788         if (buffer1_len > 32768)
 789                 printk(KERN_WARNING "length > 32k: %zu.\n", buffer1_len);
 790         /* printk("TS callback: %u bytes, %u TS cells @ %p.\n",
 791                   buffer1_len, buffer1_len / TS_SZ, buffer1); */
 792         dvb_net_ule(dev, buffer1, buffer1_len);
 793         return 0;
 794 }
 795
 796
 797 static void dvb_net_sec(struct net_device *dev, u8 *pkt, int pkt_len)
 798 {
 799         u8 *eth;
 800         struct sk_buff *skb;
 801         struct net_device_stats *stats = &(((struct dvb_net_priv *) dev->priv)->stats);
 802         int snap = 0;
 803
 804         /* note: pkt_len includes a 32bit checksum */
 805         if (pkt_len < 16) {
 806                 printk("%s: IP/MPE packet length = %d too small.\n",
 807                         dev->name, pkt_len);
 808                 stats->rx_errors++;
 809                 stats->rx_length_errors++;
 810                 return;
 811         }
 812 /* it seems some ISPs manage to screw up here, so we have to
 813  * relax the error checks... */
 814 #if 0
 815         if ((pkt[5] & 0xfd) != 0xc1) {
 816                 /* drop scrambled or broken packets */
 817 #else
 818         if ((pkt[5] & 0x3c) != 0x00) {
 819                 /* drop scrambled */
 820 #endif
 821                 stats->rx_errors++;
 822                 stats->rx_crc_errors++;
 823                 return;
 824         }
 825         if (pkt[5] & 0x02) {
 826                 /* handle LLC/SNAP, see rfc-1042 */
 827                 if (pkt_len < 24 || memcmp(&pkt[12], "\xaa\xaa\x03\0\0\0", 6)) {
 828                         stats->rx_dropped++;
 829                         return;
 830                 }
 831                 snap = 8;
 832         }
 833         if (pkt[7]) {
 834                 /* FIXME: assemble datagram from multiple sections */
 835                 stats->rx_errors++;
 836                 stats->rx_frame_errors++;
 837                 return;
 838         }
 839
 840         /* we have 14 byte ethernet header (ip header follows);
 841          * 12 byte MPE header; 4 byte checksum; + 2 byte alignment, 8 byte LLC/SNAP
 842          */
 843         if (!(skb = dev_alloc_skb(pkt_len - 4 - 12 + 14 + 2 - snap))) {
 844                 //printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n", dev->name);
 845                 stats->rx_dropped++;
 846                 return;
 847         }
 848         skb_reserve(skb, 2);    /* longword align L3 header */
 849         skb->dev = dev;
 850
 851         /* copy L3 payload */
 852         eth = (u8 *) skb_put(skb, pkt_len - 12 - 4 + 14 - snap);
 853         memcpy(eth + 14, pkt + 12 + snap, pkt_len - 12 - 4 - snap);
 854
 855         /* create ethernet header: */
 856         eth[0]=pkt[0x0b];
 857         eth[1]=pkt[0x0a];
 858         eth[2]=pkt[0x09];
 859         eth[3]=pkt[0x08];
 860         eth[4]=pkt[0x04];
 861         eth[5]=pkt[0x03];
 862
 863         eth[6]=eth[7]=eth[8]=eth[9]=eth[10]=eth[11]=0;
 864
 865         if (snap) {
 866                 eth[12] = pkt[18];
 867                 eth[13] = pkt[19];
 868         } else {
 869                 /* protocol numbers are from rfc-1700 or
 870                  * http://www.iana.org/assignments/ethernet-numbers
 871                  */
 872                 if (pkt[12] >> 4 == 6) { /* version field from IP header */
 873                         eth[12] = 0x86; /* IPv6 */
 874                         eth[13] = 0xdd;
 875                 } else {
 876                         eth[12] = 0x08; /* IPv4 */
 877                         eth[13] = 0x00;
 878                 }
 879         }
 880
 881         skb->protocol = dvb_net_eth_type_trans(skb, dev);
 882
 883         stats->rx_packets++;
 884         stats->rx_bytes+=skb->len;
 885         netif_rx(skb);
 886 }
 887
 888 static int dvb_net_sec_callback(const u8 *buffer1, size_t buffer1_len,
 889                  const u8 *buffer2, size_t buffer2_len,
 890                  struct dmx_section_filter *filter,
 891                  enum dmx_success success)
 892 {
 893         struct net_device *dev = filter->priv;
 894
 895         /**
 896          * we rely on the DVB API definition where exactly one complete
 897          * section is delivered in buffer1
 898          */
 899         dvb_net_sec (dev, (u8*) buffer1, buffer1_len);
 900         return 0;
 901 }
 902
 903 static int dvb_net_tx(struct sk_buff *skb, struct net_device *dev)
 904 {
 905         dev_kfree_skb(skb);
 906         return 0;
 907 }
 908
 909 static u8 mask_normal[6]={0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
 910 static u8 mask_allmulti[6]={0xff, 0xff, 0xff, 0x00, 0x00, 0x00};
 911 static u8 mac_allmulti[6]={0x01, 0x00, 0x5e, 0x00, 0x00, 0x00};
 912 static u8 mask_promisc[6]={0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
 913
 914 static int dvb_net_filter_sec_set(struct net_device *dev,
 915                    struct dmx_section_filter **secfilter,
 916                    u8 *mac, u8 *mac_mask)
 917 {
 918         struct dvb_net_priv *priv = dev->priv;
 919         int ret;
 920
 921         *secfilter=NULL;
 922         ret = priv->secfeed->allocate_filter(priv->secfeed, secfilter);
 923         if (ret<0) {
 924                 printk("%s: could not get filter\n", dev->name);
 925                 return ret;
 926         }
 927
 928         (*secfilter)->priv=(void *) dev;
 929
 930         memset((*secfilter)->filter_value, 0x00, DMX_MAX_FILTER_SIZE);
 931         memset((*secfilter)->filter_mask,  0x00, DMX_MAX_FILTER_SIZE);
 932         memset((*secfilter)->filter_mode,  0xff, DMX_MAX_FILTER_SIZE);
 933
 934         (*secfilter)->filter_value[0]=0x3e;
 935         (*secfilter)->filter_value[3]=mac[5];
 936         (*secfilter)->filter_value[4]=mac[4];
 937         (*secfilter)->filter_value[8]=mac[3];
 938         (*secfilter)->filter_value[9]=mac[2];
 939         (*secfilter)->filter_value[10]=mac[1];
 940         (*secfilter)->filter_value[11]=mac[0];
 941
 942         (*secfilter)->filter_mask[0] = 0xff;
 943         (*secfilter)->filter_mask[3] = mac_mask[5];
 944         (*secfilter)->filter_mask[4] = mac_mask[4];
 945         (*secfilter)->filter_mask[8] = mac_mask[3];
 946         (*secfilter)->filter_mask[9] = mac_mask[2];
 947         (*secfilter)->filter_mask[10] = mac_mask[1];
 948         (*secfilter)->filter_mask[11]=mac_mask[0];
 949
 950         dprintk("%s: filter mac=%02x %02x %02x %02x %02x %02x\n",
 951                dev->name, mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
 952         dprintk("%s: filter mask=%02x %02x %02x %02x %02x %02x\n",
 953                dev->name, mac_mask[0], mac_mask[1], mac_mask[2],
 954                mac_mask[3], mac_mask[4], mac_mask[5]);
 955
 956         return 0;
 957 }
 958
 959 static int dvb_net_feed_start(struct net_device *dev)
 960 {
 961         int ret = 0, i;
 962         struct dvb_net_priv *priv = dev->priv;
 963         struct dmx_demux *demux = priv->demux;
 964         unsigned char *mac = (unsigned char *) dev->dev_addr;
 965
 966         dprintk("%s: rx_mode %i\n", __FUNCTION__, priv->rx_mode);
 967         mutex_lock(&priv->mutex);
 968         if (priv->tsfeed || priv->secfeed || priv->secfilter || priv->multi_secfilter[0])
 969                 printk("%s: BUG %d\n", __FUNCTION__, __LINE__);
 970
 971         priv->secfeed=NULL;
 972         priv->secfilter=NULL;
 973         priv->tsfeed = NULL;
 974
 975         if (priv->feedtype == DVB_NET_FEEDTYPE_MPE) {
 976                 dprintk("%s: alloc secfeed\n", __FUNCTION__);
 977                 ret=demux->allocate_section_feed(demux, &priv->secfeed,
 978                                          dvb_net_sec_callback);
 979                 if (ret<0) {
 980                         printk("%s: could not allocate section feed\n", dev->name);
 981                         goto error;
 982                 }
 983
 984                 ret = priv->secfeed->set(priv->secfeed, priv->pid, 32768, 1);
 985
 986                 if (ret<0) {
 987                         printk("%s: could not set section feed\n", dev->name);
 988                         priv->demux->release_section_feed(priv->demux, priv->secfeed);
 989                         priv->secfeed=NULL;
 990                         goto error;
 991                 }
 992
 993                 if (priv->rx_mode != RX_MODE_PROMISC) {
 994                         dprintk("%s: set secfilter\n", __FUNCTION__);
 995                         dvb_net_filter_sec_set(dev, &priv->secfilter, mac, mask_normal);
 996                 }
 997
 998                 switch (priv->rx_mode) {
 999                 case RX_MODE_MULTI:
1000                         for (i = 0; i < priv->multi_num; i++) {
1001                                 dprintk("%s: set multi_secfilter[%d]\n", __FUNCTION__, i);
1002                                 dvb_net_filter_sec_set(dev, &priv->multi_secfilter[i],
1003                                                        priv->multi_macs[i], mask_normal);
1004                         }
1005                         break;
1006                 case RX_MODE_ALL_MULTI:
1007                         priv->multi_num=1;
1008                         dprintk("%s: set multi_secfilter[0]\n", __FUNCTION__);
1009                         dvb_net_filter_sec_set(dev, &priv->multi_secfilter[0],
1010                                                mac_allmulti, mask_allmulti);
1011                         break;
1012                 case RX_MODE_PROMISC:
1013                         priv->multi_num=0;
1014                         dprintk("%s: set secfilter\n", __FUNCTION__);
1015                         dvb_net_filter_sec_set(dev, &priv->secfilter, mac, mask_promisc);
1016                         break;
1017                 }
1018
1019                 dprintk("%s: start filtering\n", __FUNCTION__);
1020                 priv->secfeed->start_filtering(priv->secfeed);
1021         } else if (priv->feedtype == DVB_NET_FEEDTYPE_ULE) {
1022                 struct timespec timeout = { 0, 10000000 }; // 10 msec
1023
1024                 /* we have payloads encapsulated in TS */
1025                 dprintk("%s: alloc tsfeed\n", __FUNCTION__);
1026                 ret = demux->allocate_ts_feed(demux, &priv->tsfeed, dvb_net_ts_callback);
1027                 if (ret < 0) {
1028                         printk("%s: could not allocate ts feed\n", dev->name);
1029                         goto error;
1030                 }
1031
1032                 /* Set netdevice pointer for ts decaps callback. */
1033                 priv->tsfeed->priv = (void *)dev;
1034                 ret = priv->tsfeed->set(priv->tsfeed,
1035                                         priv->pid, /* pid */
1036                                         TS_PACKET, /* type */
1037                                         DMX_TS_PES_OTHER, /* pes type */
1038                                         32768,     /* circular buffer size */
1039                                         timeout    /* timeout */
1040                                         );
1041
1042                 if (ret < 0) {
1043                         printk("%s: could not set ts feed\n", dev->name);
1044                         priv->demux->release_ts_feed(priv->demux, priv->tsfeed);
1045                         priv->tsfeed = NULL;
1046                         goto error;
1047                 }
1048
1049                 dprintk("%s: start filtering\n", __FUNCTION__);
1050                 priv->tsfeed->start_filtering(priv->tsfeed);
1051         } else
1052                 ret = -EINVAL;
1053
1054 error:
1055         mutex_unlock(&priv->mutex);
1056         return ret;
1057 }
1058
1059 static int dvb_net_feed_stop(struct net_device *dev)
1060 {
1061         struct dvb_net_priv *priv = dev->priv;
1062         int i, ret = 0;
1063
1064         dprintk("%s\n", __FUNCTION__);
1065         mutex_lock(&priv->mutex);
1066         if (priv->feedtype == DVB_NET_FEEDTYPE_MPE) {
1067                 if (priv->secfeed) {
1068                         if (priv->secfeed->is_filtering) {
1069                                 dprintk("%s: stop secfeed\n", __FUNCTION__);
1070                                 priv->secfeed->stop_filtering(priv->secfeed);
1071                         }
1072
1073                         if (priv->secfilter) {
1074                                 dprintk("%s: release secfilter\n", __FUNCTION__);
1075                                 priv->secfeed->release_filter(priv->secfeed,
1076                                                               priv->secfilter);
1077                                 priv->secfilter=NULL;
1078                         }
1079
1080                         for (i=0; i<priv->multi_num; i++) {
1081                                 if (priv->multi_secfilter[i]) {
1082                                         dprintk("%s: release multi_filter[%d]\n",
1083                                                 __FUNCTION__, i);
1084                                         priv->secfeed->release_filter(priv->secfeed,
1085                                                                       priv->multi_secfilter[i]);
1086                                         priv->multi_secfilter[i] = NULL;
1087                                 }
1088                         }
1089
1090                         priv->demux->release_section_feed(priv->demux, priv->secfeed);
1091                         priv->secfeed = NULL;
1092                 } else
1093                         printk("%s: no feed to stop\n", dev->name);
1094         } else if (priv->feedtype == DVB_NET_FEEDTYPE_ULE) {
1095                 if (priv->tsfeed) {
1096                         if (priv->tsfeed->is_filtering) {
1097                                 dprintk("%s: stop tsfeed\n", __FUNCTION__);
1098                                 priv->tsfeed->stop_filtering(priv->tsfeed);
1099                         }
1100                         priv->demux->release_ts_feed(priv->demux, priv->tsfeed);
1101                         priv->tsfeed = NULL;
1102                 }
1103                 else
1104                         printk("%s: no ts feed to stop\n", dev->name);
1105         } else
1106                 ret = -EINVAL;
1107         mutex_unlock(&priv->mutex);
1108         return ret;
1109 }
1110
1111
1112 static int dvb_set_mc_filter (struct net_device *dev, struct dev_mc_list *mc)
1113 {
1114         struct dvb_net_priv *priv = dev->priv;
1115
1116         if (priv->multi_num == DVB_NET_MULTICAST_MAX)
1117                 return -ENOMEM;
1118
1119         memcpy(priv->multi_macs[priv->multi_num], mc->dmi_addr, 6);
1120
1121         priv->multi_num++;
1122         return 0;
1123 }
1124
1125
1126 static void wq_set_multicast_list (void *data)
1127 {
1128         struct net_device *dev = data;
1129         struct dvb_net_priv *priv = dev->priv;
1130
1131         dvb_net_feed_stop(dev);
1132         priv->rx_mode = RX_MODE_UNI;
1133         netif_tx_lock_bh(dev);
1134
1135         if (dev->flags & IFF_PROMISC) {
1136                 dprintk("%s: promiscuous mode\n", dev->name);
1137                 priv->rx_mode = RX_MODE_PROMISC;
1138         } else if ((dev->flags & IFF_ALLMULTI)) {
1139                 dprintk("%s: allmulti mode\n", dev->name);
1140                 priv->rx_mode = RX_MODE_ALL_MULTI;
1141         } else if (dev->mc_count) {
1142                 int mci;
1143                 struct dev_mc_list *mc;
1144
1145                 dprintk("%s: set_mc_list, %d entries\n",
1146                         dev->name, dev->mc_count);
1147
1148                 priv->rx_mode = RX_MODE_MULTI;
1149                 priv->multi_num = 0;
1150
1151                 for (mci = 0, mc=dev->mc_list;
1152                      mci < dev->mc_count;
1153                      mc = mc->next, mci++) {
1154                         dvb_set_mc_filter(dev, mc);
1155                 }
1156         }
1157
1158         netif_tx_unlock_bh(dev);
1159         dvb_net_feed_start(dev);
1160 }
1161
1162
1163 static void dvb_net_set_multicast_list (struct net_device *dev)
1164 {
1165         struct dvb_net_priv *priv = dev->priv;
1166         schedule_work(&priv->set_multicast_list_wq);
1167 }
1168
1169
1170 static void wq_restart_net_feed (void *data)
1171 {
1172         struct net_device *dev = data;
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 = dev->priv;
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 = dev->priv;
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 = dev->priv;
1208
1209         priv->in_use--;
1210         return dvb_net_feed_stop(dev);
1211 }
1212
1213 static struct net_device_stats * dvb_net_get_stats(struct net_device *dev)
1214 {
1215         return &((struct dvb_net_priv*) dev->priv)->stats;
1216 }
1217
1218 static void dvb_net_setup(struct net_device *dev)
1219 {
1220         ether_setup(dev);
1221
1222         dev->open               = dvb_net_open;
1223         dev->stop               = dvb_net_stop;
1224         dev->hard_start_xmit    = dvb_net_tx;
1225         dev->get_stats          = dvb_net_get_stats;
1226         dev->set_multicast_list = dvb_net_set_multicast_list;
1227         dev->set_mac_address    = dvb_net_set_mac;
1228         dev->mtu                = 4096;
1229         dev->mc_count           = 0;
1230         dev->hard_header_cache  = NULL;
1231         dev->flags |= IFF_NOARP;
1232 }
1233
1234 static int get_if(struct dvb_net *dvbnet)
1235 {
1236         int i;
1237
1238         for (i=0; i<DVB_NET_DEVICES_MAX; i++)
1239                 if (!dvbnet->state[i])
1240                         break;
1241
1242         if (i == DVB_NET_DEVICES_MAX)
1243                 return -1;
1244
1245         dvbnet->state[i]=1;
1246         return i;
1247 }
1248
1249 static int dvb_net_add_if(struct dvb_net *dvbnet, u16 pid, u8 feedtype)
1250 {
1251         struct net_device *net;
1252         struct dvb_net_priv *priv;
1253         int result;
1254         int if_num;
1255
1256         if (feedtype != DVB_NET_FEEDTYPE_MPE && feedtype != DVB_NET_FEEDTYPE_ULE)
1257                 return -EINVAL;
1258         if ((if_num = get_if(dvbnet)) < 0)
1259                 return -EINVAL;
1260
1261         net = alloc_netdev(sizeof(struct dvb_net_priv), "dvb", dvb_net_setup);
1262         if (!net)
1263                 return -ENOMEM;
1264
1265         if (dvbnet->dvbdev->id)
1266                 snprintf(net->name, IFNAMSIZ, "dvb%d%u%d",
1267                          dvbnet->dvbdev->adapter->num, dvbnet->dvbdev->id, if_num);
1268         else
1269                 /* compatibility fix to keep dvb0_0 format */
1270                 snprintf(net->name, IFNAMSIZ, "dvb%d_%d",
1271                          dvbnet->dvbdev->adapter->num, if_num);
1272
1273         net->addr_len = 6;
1274         memcpy(net->dev_addr, dvbnet->dvbdev->adapter->proposed_mac, 6);
1275
1276         dvbnet->device[if_num] = net;
1277
1278         priv = net->priv;
1279         priv->demux = dvbnet->demux;
1280         priv->pid = pid;
1281         priv->rx_mode = RX_MODE_UNI;
1282         priv->need_pusi = 1;
1283         priv->tscc = 0;
1284         priv->feedtype = feedtype;
1285         reset_ule(priv);
1286
1287         INIT_WORK(&priv->set_multicast_list_wq, wq_set_multicast_list, net);
1288         INIT_WORK(&priv->restart_net_feed_wq, wq_restart_net_feed, net);
1289         mutex_init(&priv->mutex);
1290
1291         net->base_addr = pid;
1292
1293         if ((result = register_netdev(net)) < 0) {
1294                 dvbnet->device[if_num] = NULL;
1295                 free_netdev(net);
1296                 return result;
1297         }
1298         printk("dvb_net: created network interface %s\n", net->name);
1299
1300         return if_num;
1301 }
1302
1303 static int dvb_net_remove_if(struct dvb_net *dvbnet, unsigned long num)
1304 {
1305         struct net_device *net = dvbnet->device[num];
1306         struct dvb_net_priv *priv;
1307
1308         if (!dvbnet->state[num])
1309                 return -EINVAL;
1310         priv = net->priv;
1311         if (priv->in_use)
1312                 return -EBUSY;
1313
1314         dvb_net_stop(net);
1315         flush_scheduled_work();
1316         printk("dvb_net: removed network interface %s\n", net->name);
1317         unregister_netdev(net);
1318         dvbnet->state[num]=0;
1319         dvbnet->device[num] = NULL;
1320         free_netdev(net);
1321
1322         return 0;
1323 }
1324
1325 static int dvb_net_do_ioctl(struct inode *inode, struct file *file,
1326                   unsigned int cmd, void *parg)
1327 {
1328         struct dvb_device *dvbdev = file->private_data;
1329         struct dvb_net *dvbnet = dvbdev->priv;
1330
1331         if (((file->f_flags&O_ACCMODE)==O_RDONLY))
1332                 return -EPERM;
1333
1334         switch (cmd) {
1335         case NET_ADD_IF:
1336         {
1337                 struct dvb_net_if *dvbnetif = parg;
1338                 int result;
1339
1340                 if (!capable(CAP_SYS_ADMIN))
1341                         return -EPERM;
1342
1343                 if (!try_module_get(dvbdev->adapter->module))
1344                         return -EPERM;
1345
1346                 result=dvb_net_add_if(dvbnet, dvbnetif->pid, dvbnetif->feedtype);
1347                 if (result<0) {
1348                         module_put(dvbdev->adapter->module);
1349                         return result;
1350                 }
1351                 dvbnetif->if_num=result;
1352                 break;
1353         }
1354         case NET_GET_IF:
1355         {
1356                 struct net_device *netdev;
1357                 struct dvb_net_priv *priv_data;
1358                 struct dvb_net_if *dvbnetif = parg;
1359
1360                 if (dvbnetif->if_num >= DVB_NET_DEVICES_MAX ||
1361                     !dvbnet->state[dvbnetif->if_num])
1362                         return -EINVAL;
1363
1364                 netdev = dvbnet->device[dvbnetif->if_num];
1365
1366                 priv_data = netdev->priv;
1367                 dvbnetif->pid=priv_data->pid;
1368                 dvbnetif->feedtype=priv_data->feedtype;
1369                 break;
1370         }
1371         case NET_REMOVE_IF:
1372         {
1373                 int ret;
1374
1375                 if (!capable(CAP_SYS_ADMIN))
1376                         return -EPERM;
1377                 if ((unsigned long) parg >= DVB_NET_DEVICES_MAX)
1378                         return -EINVAL;
1379                 ret = dvb_net_remove_if(dvbnet, (unsigned long) parg);
1380                 if (!ret)
1381                         module_put(dvbdev->adapter->module);
1382                 return ret;
1383         }
1384
1385         /* binary compatiblity cruft */
1386         case __NET_ADD_IF_OLD:
1387         {
1388                 struct __dvb_net_if_old *dvbnetif = parg;
1389                 int result;
1390
1391                 if (!capable(CAP_SYS_ADMIN))
1392                         return -EPERM;
1393
1394                 if (!try_module_get(dvbdev->adapter->module))
1395                         return -EPERM;
1396
1397                 result=dvb_net_add_if(dvbnet, dvbnetif->pid, DVB_NET_FEEDTYPE_MPE);
1398                 if (result<0) {
1399                         module_put(dvbdev->adapter->module);
1400                         return result;
1401                 }
1402                 dvbnetif->if_num=result;
1403                 break;
1404         }
1405         case __NET_GET_IF_OLD:
1406         {
1407                 struct net_device *netdev;
1408                 struct dvb_net_priv *priv_data;
1409                 struct __dvb_net_if_old *dvbnetif = parg;
1410
1411                 if (dvbnetif->if_num >= DVB_NET_DEVICES_MAX ||
1412                     !dvbnet->state[dvbnetif->if_num])
1413                         return -EINVAL;
1414
1415                 netdev = dvbnet->device[dvbnetif->if_num];
1416
1417                 priv_data = netdev->priv;
1418                 dvbnetif->pid=priv_data->pid;
1419                 break;
1420         }
1421         default:
1422                 return -ENOTTY;
1423         }
1424         return 0;
1425 }
1426
1427 static int dvb_net_ioctl(struct inode *inode, struct file *file,
1428               unsigned int cmd, unsigned long arg)
1429 {
1430         return dvb_usercopy(inode, file, cmd, arg, dvb_net_do_ioctl);
1431 }
1432
1433 static struct file_operations dvb_net_fops = {
1434         .owner = THIS_MODULE,
1435         .ioctl = dvb_net_ioctl,
1436         .open = dvb_generic_open,
1437         .release = dvb_generic_release,
1438 };
1439
1440 static struct dvb_device dvbdev_net = {
1441         .priv = NULL,
1442         .users = 1,
1443         .writers = 1,
1444         .fops = &dvb_net_fops,
1445 };
1446
1447
1448 void dvb_net_release (struct dvb_net *dvbnet)
1449 {
1450         int i;
1451
1452         dvb_unregister_device(dvbnet->dvbdev);
1453
1454         for (i=0; i<DVB_NET_DEVICES_MAX; i++) {
1455                 if (!dvbnet->state[i])
1456                         continue;
1457                 dvb_net_remove_if(dvbnet, i);
1458         }
1459 }
1460 EXPORT_SYMBOL(dvb_net_release);
1461
1462
1463 int dvb_net_init (struct dvb_adapter *adap, struct dvb_net *dvbnet,
1464                   struct dmx_demux *dmx)
1465 {
1466         int i;
1467
1468         dvbnet->demux = dmx;
1469
1470         for (i=0; i<DVB_NET_DEVICES_MAX; i++)
1471                 dvbnet->state[i] = 0;
1472
1473         dvb_register_device (adap, &dvbnet->dvbdev, &dvbdev_net,
1474                              dvbnet, DVB_DEVICE_NET);
1475
1476         return 0;
1477 }
1478 EXPORT_SYMBOL(dvb_net_init);