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   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 draft-ietf-ipdvb-ule-03.txt.
  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  */
  46
  47 /*
  48  * FIXME / TODO (dvb_net.c):
  49  *
  50  * Unloading does not work for 2.6.9 kernels: a refcount doesn't go to zero.
  51  *
  52  * TS_FEED callback is called once for every single TS cell although it is
  53  * registered (in dvb_net_feed_start()) for 100 TS cells (used for dvb_net_ule()).
  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
  66 #include "dvb_demux.h"
  67 #include "dvb_net.h"
  68
  69 static int dvb_net_debug;
  70 module_param(dvb_net_debug, int, 0444);
  71 MODULE_PARM_DESC(dvb_net_debug, "enable debug messages");
  72
  73 #define dprintk(x...) do { if (dvb_net_debug) printk(x); } while (0)
  74
  75
  76 static inline __u32 iov_crc32( __u32 c, struct kvec *iov, unsigned int cnt )
  77 {
  78         unsigned int j;
  79         for (j = 0; j < cnt; j++)
  80                 c = crc32_be( c, iov[j].iov_base, iov[j].iov_len );
  81         return c;
  82 }
  83
  84
  85 #define DVB_NET_MULTICAST_MAX 10
  86
  87 #undef ULE_DEBUG
  88
  89 #ifdef ULE_DEBUG
  90
  91 #define isprint(c)      ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || (c >= '0' && c <= '9'))
  92
  93 static void hexdump( const unsigned char *buf, unsigned short len )
  94 {
  95         char str[80], octet[10];
  96         int ofs, i, l;
  97
  98         for (ofs = 0; ofs < len; ofs += 16) {
  99                 sprintf( str, "%03d: ", ofs );
 100
 101                 for (i = 0; i < 16; i++) {
 102                         if ((i + ofs) < len)
 103                                 sprintf( octet, "%02x ", buf[ofs + i] );
 104                         else
 105                                 strcpy( octet, "   " );
 106
 107                         strcat( str, octet );
 108                 }
 109                 strcat( str, "  " );
 110                 l = strlen( str );
 111
 112                 for (i = 0; (i < 16) && ((i + ofs) < len); i++)
 113                         str[l++] = isprint( buf[ofs + i] ) ? buf[ofs + i] : '.';
 114
 115                 str[l] = '\0';
 116                 printk( KERN_WARNING "%s\n", str );
 117         }
 118 }
 119
 120 #endif
 121
 122 struct dvb_net_priv {
 123         int in_use;
 124         struct net_device_stats stats;
 125         u16 pid;
 126         struct dvb_net *host;
 127         struct dmx_demux *demux;
 128         struct dmx_section_feed *secfeed;
 129         struct dmx_section_filter *secfilter;
 130         struct dmx_ts_feed *tsfeed;
 131         int multi_num;
 132         struct dmx_section_filter *multi_secfilter[DVB_NET_MULTICAST_MAX];
 133         unsigned char multi_macs[DVB_NET_MULTICAST_MAX][6];
 134         int rx_mode;
 135 #define RX_MODE_UNI 0
 136 #define RX_MODE_MULTI 1
 137 #define RX_MODE_ALL_MULTI 2
 138 #define RX_MODE_PROMISC 3
 139         struct work_struct set_multicast_list_wq;
 140         struct work_struct restart_net_feed_wq;
 141         unsigned char feedtype;                 /* Either FEED_TYPE_ or FEED_TYPE_ULE */
 142         int need_pusi;                          /* Set to 1, if synchronization on PUSI required. */
 143         unsigned char tscc;                     /* TS continuity counter after sync on PUSI. */
 144         struct sk_buff *ule_skb;                /* ULE SNDU decodes into this buffer. */
 145         unsigned char *ule_next_hdr;            /* Pointer into skb to next ULE extension header. */
 146         unsigned short ule_sndu_len;            /* ULE SNDU length in bytes, w/o D-Bit. */
 147         unsigned short ule_sndu_type;           /* ULE SNDU type field, complete. */
 148         unsigned char ule_sndu_type_1;          /* ULE SNDU type field, if split across 2 TS cells. */
 149         unsigned char ule_dbit;                 /* Whether the DestMAC address present
 150                                                  * or not (bit is set). */
 151         unsigned char ule_bridged;              /* Whether the ULE_BRIDGED extension header was found. */
 152         int ule_sndu_remain;                    /* Nr. of bytes still required for current ULE SNDU. */
 153         unsigned long ts_count;                 /* Current ts cell counter. */
 154
 155         struct semaphore mutex;
 156 };
 157
 158
 159 /**
 160  *      Determine the packet's protocol ID. The rule here is that we
 161  *      assume 802.3 if the type field is short enough to be a length.
 162  *      This is normal practice and works for any 'now in use' protocol.
 163  *
 164  *  stolen from eth.c out of the linux kernel, hacked for dvb-device
 165  *  by Michael Holzt <kju@debian.org>
 166  */
 167 static unsigned short dvb_net_eth_type_trans(struct sk_buff *skb,
 168                                       struct net_device *dev)
 169 {
 170         struct ethhdr *eth;
 171         unsigned char *rawp;
 172
 173         skb->mac.raw=skb->data;
 174         skb_pull(skb,dev->hard_header_len);
 175         eth = eth_hdr(skb);
 176
 177         if (*eth->h_dest & 1) {
 178                 if(memcmp(eth->h_dest,dev->broadcast, ETH_ALEN)==0)
 179                         skb->pkt_type=PACKET_BROADCAST;
 180                 else
 181                         skb->pkt_type=PACKET_MULTICAST;
 182         }
 183
 184         if (ntohs(eth->h_proto) >= 1536)
 185                 return eth->h_proto;
 186
 187         rawp = skb->data;
 188
 189         /**
 190          *      This is a magic hack to spot IPX packets. Older Novell breaks
 191          *      the protocol design and runs IPX over 802.3 without an 802.2 LLC
 192          *      layer. We look for FFFF which isn't a used 802.2 SSAP/DSAP. This
 193          *      won't work for fault tolerant netware but does for the rest.
 194          */
 195         if (*(unsigned short *)rawp == 0xFFFF)
 196                 return htons(ETH_P_802_3);
 197
 198         /**
 199          *      Real 802.2 LLC
 200          */
 201         return htons(ETH_P_802_2);
 202 }
 203
 204 #define TS_SZ   188
 205 #define TS_SYNC 0x47
 206 #define TS_TEI  0x80
 207 #define TS_SC   0xC0
 208 #define TS_PUSI 0x40
 209 #define TS_AF_A 0x20
 210 #define TS_AF_D 0x10
 211
 212 /* ULE Extension Header handlers. */
 213
 214 #define ULE_TEST        0
 215 #define ULE_BRIDGED     1
 216
 217 static int ule_test_sndu( struct dvb_net_priv *p )
 218 {
 219         return -1;
 220 }
 221
 222 static int ule_bridged_sndu( struct dvb_net_priv *p )
 223 {
 224         /* BRIDGE SNDU handling sucks in draft-ietf-ipdvb-ule-03.txt.
 225          * This has to be the last extension header, otherwise it won't work.
 226          * Blame the authors!
 227          */
 228         p->ule_bridged = 1;
 229         return 0;
 230 }
 231
 232
 233 /** Handle ULE extension headers.
 234  *  Function is called after a successful CRC32 verification of an ULE SNDU to complete its decoding.
 235  *  Returns: >= 0: nr. of bytes consumed by next extension header
 236  *           -1:   Mandatory extension header that is not recognized or TEST SNDU; discard.
 237  */
 238 static int handle_one_ule_extension( struct dvb_net_priv *p )
 239 {
 240         /* Table of mandatory extension header handlers.  The header type is the index. */
 241         static int (*ule_mandatory_ext_handlers[255])( struct dvb_net_priv *p ) =
 242                 { [0] = ule_test_sndu, [1] = ule_bridged_sndu, [2] = NULL,  };
 243
 244         /* Table of optional extension header handlers.  The header type is the index. */
 245         static int (*ule_optional_ext_handlers[255])( struct dvb_net_priv *p ) = { NULL, };
 246
 247         int ext_len = 0;
 248         unsigned char hlen = (p->ule_sndu_type & 0x0700) >> 8;
 249         unsigned char htype = p->ule_sndu_type & 0x00FF;
 250
 251         /* Discriminate mandatory and optional extension headers. */
 252         if (hlen == 0) {
 253                 /* Mandatory extension header */
 254                 if (ule_mandatory_ext_handlers[htype]) {
 255                         ext_len = ule_mandatory_ext_handlers[htype]( p );
 256                         p->ule_next_hdr += ext_len;
 257                         if (! p->ule_bridged) {
 258                                 p->ule_sndu_type = ntohs( *(unsigned short *)p->ule_next_hdr );
 259                                 p->ule_next_hdr += 2;
 260                         } else {
 261                                 p->ule_sndu_type = ntohs( *(unsigned short *)(p->ule_next_hdr + ((p->ule_dbit ? 2 : 3) * ETH_ALEN)) );
 262                                 /* This assures the extension handling loop will terminate. */
 263                         }
 264                 } else
 265                         ext_len = -1;   /* SNDU has to be discarded. */
 266         } else {
 267                 /* Optional extension header.  Calculate the length. */
 268                 ext_len = hlen << 2;
 269                 /* Process the optional extension header according to its type. */
 270                 if (ule_optional_ext_handlers[htype])
 271                         (void)ule_optional_ext_handlers[htype]( p );
 272                 p->ule_next_hdr += ext_len;
 273                 p->ule_sndu_type = ntohs( *(unsigned short *)p->ule_next_hdr );
 274                 p->ule_next_hdr += 2;
 275         }
 276
 277         return ext_len;
 278 }
 279
 280 static int handle_ule_extensions( struct dvb_net_priv *p )
 281 {
 282         int total_ext_len = 0, l;
 283
 284         p->ule_next_hdr = p->ule_skb->data;
 285         do {
 286                 l = handle_one_ule_extension( p );
 287                 if (l == -1) return -1; /* Stop extension header processing and discard SNDU. */
 288                 total_ext_len += l;
 289
 290         } while (p->ule_sndu_type < 1536);
 291
 292         return total_ext_len;
 293 }
 294
 295
 296 /** Prepare for a new ULE SNDU: reset the decoder state. */
 297 static inline void reset_ule( struct dvb_net_priv *p )
 298 {
 299         p->ule_skb = NULL;
 300         p->ule_next_hdr = NULL;
 301         p->ule_sndu_len = 0;
 302         p->ule_sndu_type = 0;
 303         p->ule_sndu_type_1 = 0;
 304         p->ule_sndu_remain = 0;
 305         p->ule_dbit = 0xFF;
 306         p->ule_bridged = 0;
 307 }
 308
 309 /**
 310  * Decode ULE SNDUs according to draft-ietf-ipdvb-ule-03.txt from a sequence of
 311  * TS cells of a single PID.
 312  */
 313 static void dvb_net_ule( struct net_device *dev, const u8 *buf, size_t buf_len )
 314 {
 315         struct dvb_net_priv *priv = dev->priv;
 316         unsigned long skipped = 0L;
 317         u8 *ts, *ts_end, *from_where = NULL, ts_remain = 0, how_much = 0, new_ts = 1;
 318         struct ethhdr *ethh = NULL;
 319
 320 #ifdef ULE_DEBUG
 321         /* The code inside ULE_DEBUG keeps a history of the last 100 TS cells processed. */
 322         static unsigned char ule_hist[100*TS_SZ];
 323         static unsigned char *ule_where = ule_hist, ule_dump = 0;
 324 #endif
 325
 326         if (dev == NULL) {
 327                 printk( KERN_ERR "NO netdev struct!\n" );
 328                 return;
 329         }
 330
 331         /* For all TS cells in current buffer.
 332          * Appearently, we are called for every single TS cell.
 333          */
 334         for (ts = (char *)buf, ts_end = (char *)buf + buf_len; ts < ts_end; /* no default incr. */ ) {
 335
 336                 if (new_ts) {
 337                         /* We are about to process a new TS cell. */
 338
 339 #ifdef ULE_DEBUG
 340                         if (ule_where >= &ule_hist[100*TS_SZ]) ule_where = ule_hist;
 341                         memcpy( ule_where, ts, TS_SZ );
 342                         if (ule_dump) {
 343                                 hexdump( ule_where, TS_SZ );
 344                                 ule_dump = 0;
 345                         }
 346                         ule_where += TS_SZ;
 347 #endif
 348
 349                         /* Check TS error conditions: sync_byte, transport_error_indicator, scrambling_control . */
 350                         if ((ts[0] != TS_SYNC) || (ts[1] & TS_TEI) || ((ts[3] & TS_SC) != 0)) {
 351                                 printk(KERN_WARNING "%lu: Invalid TS cell: SYNC %#x, TEI %u, SC %#x.\n",
 352                                        priv->ts_count, ts[0], ts[1] & TS_TEI >> 7, ts[3] & 0xC0 >> 6);
 353
 354                                 /* Drop partly decoded SNDU, reset state, resync on PUSI. */
 355                                 if (priv->ule_skb) {
 356                                         dev_kfree_skb( priv->ule_skb );
 357                                         /* Prepare for next SNDU. */
 358                                         ((struct dvb_net_priv *) dev->priv)->stats.rx_errors++;
 359                                         ((struct dvb_net_priv *) dev->priv)->stats.rx_frame_errors++;
 360                                 }
 361                                 reset_ule(priv);
 362                                 priv->need_pusi = 1;
 363
 364                                 /* Continue with next TS cell. */
 365                                 ts += TS_SZ;
 366                                 priv->ts_count++;
 367                                 continue;
 368                         }
 369
 370                         ts_remain = 184;
 371                         from_where = ts + 4;
 372                 }
 373                 /* Synchronize on PUSI, if required. */
 374                 if (priv->need_pusi) {
 375                         if (ts[1] & TS_PUSI) {
 376                                 /* Find beginning of first ULE SNDU in current TS cell. */
 377                                 /* Synchronize continuity counter. */
 378                                 priv->tscc = ts[3] & 0x0F;
 379                                 /* There is a pointer field here. */
 380                                 if (ts[4] > ts_remain) {
 381                                         printk(KERN_ERR "%lu: Invalid ULE packet "
 382                                                "(pointer field %d)\n", priv->ts_count, ts[4]);
 383                                         ts += TS_SZ;
 384                                         priv->ts_count++;
 385                                         continue;
 386                                 }
 387                                 /* Skip to destination of pointer field. */
 388                                 from_where = &ts[5] + ts[4];
 389                                 ts_remain -= 1 + ts[4];
 390                                 skipped = 0;
 391                         } else {
 392                                 skipped++;
 393                                 ts += TS_SZ;
 394                                 priv->ts_count++;
 395                                 continue;
 396                         }
 397                 }
 398
 399                 /* Check continuity counter. */
 400                 if (new_ts) {
 401                         if ((ts[3] & 0x0F) == priv->tscc)
 402                                 priv->tscc = (priv->tscc + 1) & 0x0F;
 403                         else {
 404                                 /* TS discontinuity handling: */
 405                                 printk(KERN_WARNING "%lu: TS discontinuity: got %#x, "
 406                                        "exptected %#x.\n", priv->ts_count, ts[3] & 0x0F, priv->tscc);
 407                                 /* Drop partly decoded SNDU, reset state, resync on PUSI. */
 408                                 if (priv->ule_skb) {
 409                                         dev_kfree_skb( priv->ule_skb );
 410                                         /* Prepare for next SNDU. */
 411                                         // reset_ule(priv);  moved to below.
 412                                         ((struct dvb_net_priv *) dev->priv)->stats.rx_errors++;
 413                                         ((struct dvb_net_priv *) dev->priv)->stats.rx_frame_errors++;
 414                                 }
 415                                 reset_ule(priv);
 416                                 /* skip to next PUSI. */
 417                                 priv->need_pusi = 1;
 418                                 ts += TS_SZ;
 419                                 priv->ts_count++;
 420                                 continue;
 421                         }
 422                         /* If we still have an incomplete payload, but PUSI is
 423                          * set; some TS cells are missing.
 424                          * This is only possible here, if we missed exactly 16 TS
 425                          * cells (continuity counter wrap). */
 426                         if (ts[1] & TS_PUSI) {
 427                                 if (! priv->need_pusi) {
 428                                         if (*from_where > 181) {
 429                                                 /* Pointer field is invalid.  Drop this TS cell and any started ULE SNDU. */
 430                                                 printk(KERN_WARNING "%lu: Invalid pointer "
 431                                                        "field: %u.\n", priv->ts_count, *from_where);
 432
 433                                                 /* Drop partly decoded SNDU, reset state, resync on PUSI. */
 434                                                 if (priv->ule_skb) {
 435                                                         dev_kfree_skb( priv->ule_skb );
 436                                                         ((struct dvb_net_priv *) dev->priv)->stats.rx_errors++;
 437                                                         ((struct dvb_net_priv *) dev->priv)->stats.rx_frame_errors++;
 438                                                 }
 439                                                 reset_ule(priv);
 440                                                 priv->need_pusi = 1;
 441                                                 ts += TS_SZ;
 442                                                 priv->ts_count++;
 443                                                 continue;
 444                                         }
 445                                         /* Skip pointer field (we're processing a
 446                                          * packed payload). */
 447                                         from_where += 1;
 448                                         ts_remain -= 1;
 449                                 } else
 450                                         priv->need_pusi = 0;
 451
 452                                 if (priv->ule_sndu_remain > 183) {
 453                                         /* Current SNDU lacks more data than there could be available in the
 454                                          * current TS cell. */
 455                                         ((struct dvb_net_priv *) dev->priv)->stats.rx_errors++;
 456                                         ((struct dvb_net_priv *) dev->priv)->stats.rx_length_errors++;
 457                                         printk(KERN_WARNING "%lu: Expected %d more SNDU bytes, but "
 458                                                "got PUSI (pf %d, ts_remain %d).  Flushing incomplete payload.\n",
 459                                                priv->ts_count, priv->ule_sndu_remain, ts[4], ts_remain);
 460                                         dev_kfree_skb(priv->ule_skb);
 461                                         /* Prepare for next SNDU. */
 462                                         reset_ule(priv);
 463                                         /* Resync: go to where pointer field points to: start of next ULE SNDU. */
 464                                         from_where += ts[4];
 465                                         ts_remain -= ts[4];
 466                                 }
 467                         }
 468                 }
 469
 470                 /* Check if new payload needs to be started. */
 471                 if (priv->ule_skb == NULL) {
 472                         /* Start a new payload with skb.
 473                          * Find ULE header.  It is only guaranteed that the
 474                          * length field (2 bytes) is contained in the current
 475                          * TS.
 476                          * Check ts_remain has to be >= 2 here. */
 477                         if (ts_remain < 2) {
 478                                 printk(KERN_WARNING "Invalid payload packing: only %d "
 479                                        "bytes left in TS.  Resyncing.\n", ts_remain);
 480                                 priv->ule_sndu_len = 0;
 481                                 priv->need_pusi = 1;
 482                                 continue;
 483                         }
 484
 485                         if (! priv->ule_sndu_len) {
 486                                 /* Got at least two bytes, thus extrace the SNDU length. */
 487                                 priv->ule_sndu_len = from_where[0] << 8 | from_where[1];
 488                                 if (priv->ule_sndu_len & 0x8000) {
 489                                         /* D-Bit is set: no dest mac present. */
 490                                         priv->ule_sndu_len &= 0x7FFF;
 491                                         priv->ule_dbit = 1;
 492                                 } else
 493                                         priv->ule_dbit = 0;
 494
 495                                 if (priv->ule_sndu_len > 32763) {
 496                                         printk(KERN_WARNING "%lu: Invalid ULE SNDU length %u. "
 497                                                "Resyncing.\n", priv->ts_count, priv->ule_sndu_len);
 498                                         priv->ule_sndu_len = 0;
 499                                         priv->need_pusi = 1;
 500                                         new_ts = 1;
 501                                         ts += TS_SZ;
 502                                         priv->ts_count++;
 503                                         continue;
 504                                 }
 505                                 ts_remain -= 2; /* consume the 2 bytes SNDU length. */
 506                                 from_where += 2;
 507                         }
 508
 509                         /*
 510                          * State of current TS:
 511                          *   ts_remain (remaining bytes in the current TS cell)
 512                          *   0  ule_type is not available now, we need the next TS cell
 513                          *   1  the first byte of the ule_type is present
 514                          * >=2  full ULE header present, maybe some payload data as well.
 515                          */
 516                         switch (ts_remain) {
 517                                 case 1:
 518                                         priv->ule_sndu_type = from_where[0] << 8;
 519                                         priv->ule_sndu_type_1 = 1; /* first byte of ule_type is set. */
 520                                         ts_remain -= 1; from_where += 1;
 521                                         /* Continue w/ next TS. */
 522                                 case 0:
 523                                         new_ts = 1;
 524                                         ts += TS_SZ;
 525                                         priv->ts_count++;
 526                                         continue;
 527
 528                                 default: /* complete ULE header is present in current TS. */
 529                                         /* Extract ULE type field. */
 530                                         if (priv->ule_sndu_type_1) {
 531                                                 priv->ule_sndu_type |= from_where[0];
 532                                                 from_where += 1; /* points to payload start. */
 533                                                 ts_remain -= 1;
 534                                         } else {
 535                                                 /* Complete type is present in new TS. */
 536                                                 priv->ule_sndu_type = from_where[0] << 8 | from_where[1];
 537                                                 from_where += 2; /* points to payload start. */
 538                                                 ts_remain -= 2;
 539                                         }
 540                                         break;
 541                         }
 542
 543                         /* Allocate the skb (decoder target buffer) with the correct size, as follows:
 544                          * prepare for the largest case: bridged SNDU with MAC address (dbit = 0). */
 545                         priv->ule_skb = dev_alloc_skb( priv->ule_sndu_len + ETH_HLEN + ETH_ALEN );
 546                         if (priv->ule_skb == NULL) {
 547                                 printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n",
 548                                        dev->name);
 549                                 ((struct dvb_net_priv *)dev->priv)->stats.rx_dropped++;
 550                                 return;
 551                         }
 552
 553                         /* This includes the CRC32 _and_ dest mac, if !dbit. */
 554                         priv->ule_sndu_remain = priv->ule_sndu_len;
 555                         priv->ule_skb->dev = dev;
 556                         /* Leave space for Ethernet or bridged SNDU header (eth hdr plus one MAC addr). */
 557                         skb_reserve( priv->ule_skb, ETH_HLEN + ETH_ALEN );
 558                 }
 559
 560                 /* Copy data into our current skb. */
 561                 how_much = min(priv->ule_sndu_remain, (int)ts_remain);
 562                 memcpy(skb_put(priv->ule_skb, how_much), from_where, how_much);
 563                 priv->ule_sndu_remain -= how_much;
 564                 ts_remain -= how_much;
 565                 from_where += how_much;
 566
 567                 /* Check for complete payload. */
 568                 if (priv->ule_sndu_remain <= 0) {
 569                         /* Check CRC32, we've got it in our skb already. */
 570                         unsigned short ulen = htons(priv->ule_sndu_len);
 571                         unsigned short utype = htons(priv->ule_sndu_type);
 572                         struct kvec iov[3] = {
 573                                 { &ulen, sizeof ulen },
 574                                 { &utype, sizeof utype },
 575                                 { priv->ule_skb->data, priv->ule_skb->len - 4 }
 576                         };
 577                         unsigned long ule_crc = ~0L, expected_crc;
 578                         if (priv->ule_dbit) {
 579                                 /* Set D-bit for CRC32 verification,
 580                                  * if it was set originally. */
 581                                 ulen |= 0x0080;
 582                         }
 583
 584                         ule_crc = iov_crc32(ule_crc, iov, 3);
 585                         expected_crc = *((u8 *)priv->ule_skb->tail - 4) << 24 |
 586                                        *((u8 *)priv->ule_skb->tail - 3) << 16 |
 587                                        *((u8 *)priv->ule_skb->tail - 2) << 8 |
 588                                        *((u8 *)priv->ule_skb->tail - 1);
 589                         if (ule_crc != expected_crc) {
 590                                 printk(KERN_WARNING "%lu: CRC32 check FAILED: %#lx / %#lx, SNDU len %d type %#x, ts_remain %d, next 2: %x.\n",
 591                                        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);
 592
 593 #ifdef ULE_DEBUG
 594                                 hexdump( iov[0].iov_base, iov[0].iov_len );
 595                                 hexdump( iov[1].iov_base, iov[1].iov_len );
 596                                 hexdump( iov[2].iov_base, iov[2].iov_len );
 597
 598                                 if (ule_where == ule_hist) {
 599                                         hexdump( &ule_hist[98*TS_SZ], TS_SZ );
 600                                         hexdump( &ule_hist[99*TS_SZ], TS_SZ );
 601                                 } else if (ule_where == &ule_hist[TS_SZ]) {
 602                                         hexdump( &ule_hist[99*TS_SZ], TS_SZ );
 603                                         hexdump( ule_hist, TS_SZ );
 604                                 } else {
 605                                         hexdump( ule_where - TS_SZ - TS_SZ, TS_SZ );
 606                                         hexdump( ule_where - TS_SZ, TS_SZ );
 607                                 }
 608                                 ule_dump = 1;
 609 #endif
 610
 611                                 ((struct dvb_net_priv *) dev->priv)->stats.rx_errors++;
 612                                 ((struct dvb_net_priv *) dev->priv)->stats.rx_crc_errors++;
 613                                 dev_kfree_skb(priv->ule_skb);
 614                         } else {
 615                                 /* CRC32 verified OK. */
 616                                 /* Handle ULE Extension Headers. */
 617                                 if (priv->ule_sndu_type < 1536) {
 618                                         /* There is an extension header.  Handle it accordingly. */
 619                                         int l = handle_ule_extensions( priv );
 620                                         if (l < 0) {
 621                                                 /* Mandatory extension header unknown or TEST SNDU.  Drop it. */
 622                                                 // printk( KERN_WARNING "Dropping SNDU, extension headers.\n" );
 623                                                 dev_kfree_skb( priv->ule_skb );
 624                                                 goto sndu_done;
 625                                         }
 626                                         skb_pull( priv->ule_skb, l );
 627                                 }
 628
 629                                 /* CRC32 was OK. Remove it from skb. */
 630                                 priv->ule_skb->tail -= 4;
 631                                 priv->ule_skb->len -= 4;
 632
 633                                 /* Filter on receiver's destination MAC address, if present. */
 634                                 if (!priv->ule_dbit) {
 635                                         /* The destination MAC address is the next data in the skb. */
 636                                         if (memcmp( priv->ule_skb->data, dev->dev_addr, ETH_ALEN )) {
 637                                                 /* MAC addresses don't match.  Drop SNDU. */
 638                                                 // printk( KERN_WARNING "Dropping SNDU, MAC address.\n" );
 639                                                 dev_kfree_skb( priv->ule_skb );
 640                                                 goto sndu_done;
 641                                         }
 642                                         if (! priv->ule_bridged) {
 643                                                 skb_push( priv->ule_skb, ETH_ALEN + 2 );
 644                                                 ethh = (struct ethhdr *)priv->ule_skb->data;
 645                                                 memcpy( ethh->h_dest, ethh->h_source, ETH_ALEN );
 646                                                 memset( ethh->h_source, 0, ETH_ALEN );
 647                                                 ethh->h_proto = htons( priv->ule_sndu_type );
 648                                         } else {
 649                                                 /* Skip the Receiver destination MAC address. */
 650                                                 skb_pull( priv->ule_skb, ETH_ALEN );
 651                                         }
 652                                 } else {
 653                                         if (! priv->ule_bridged) {
 654                                                 skb_push( priv->ule_skb, ETH_HLEN );
 655                                                 ethh = (struct ethhdr *)priv->ule_skb->data;
 656                                                 memcpy( ethh->h_dest, dev->dev_addr, ETH_ALEN );
 657                                                 memset( ethh->h_source, 0, ETH_ALEN );
 658                                                 ethh->h_proto = htons( priv->ule_sndu_type );
 659                                         } else {
 660                                                 /* skb is in correct state; nothing to do. */
 661                                         }
 662                                 }
 663                                 priv->ule_bridged = 0;
 664
 665                                 /* Stuff into kernel's protocol stack. */
 666                                 priv->ule_skb->protocol = dvb_net_eth_type_trans(priv->ule_skb, dev);
 667                                 /* If D-bit is set (i.e. destination MAC address not present),
 668                                  * receive the packet anyhow. */
 669                                 /* if (priv->ule_dbit && skb->pkt_type == PACKET_OTHERHOST)
 670                                         priv->ule_skb->pkt_type = PACKET_HOST; */
 671                                 ((struct dvb_net_priv *) dev->priv)->stats.rx_packets++;
 672                                 ((struct dvb_net_priv *) dev->priv)->stats.rx_bytes += priv->ule_skb->len;
 673                                 netif_rx(priv->ule_skb);
 674                         }
 675                         sndu_done:
 676                         /* Prepare for next SNDU. */
 677                         reset_ule(priv);
 678                 }
 679
 680                 /* More data in current TS (look at the bytes following the CRC32)? */
 681                 if (ts_remain >= 2 && *((unsigned short *)from_where) != 0xFFFF) {
 682                         /* Next ULE SNDU starts right there. */
 683                         new_ts = 0;
 684                         priv->ule_skb = NULL;
 685                         priv->ule_sndu_type_1 = 0;
 686                         priv->ule_sndu_len = 0;
 687                         // printk(KERN_WARNING "More data in current TS: [%#x %#x %#x %#x]\n",
 688                         //      *(from_where + 0), *(from_where + 1),
 689                         //      *(from_where + 2), *(from_where + 3));
 690                         // printk(KERN_WARNING "ts @ %p, stopped @ %p:\n", ts, from_where + 0);
 691                         // hexdump(ts, 188);
 692                 } else {
 693                         new_ts = 1;
 694                         ts += TS_SZ;
 695                         priv->ts_count++;
 696                         if (priv->ule_skb == NULL) {
 697                                 priv->need_pusi = 1;
 698                                 priv->ule_sndu_type_1 = 0;
 699                                 priv->ule_sndu_len = 0;
 700                         }
 701                 }
 702         }       /* for all available TS cells */
 703 }
 704
 705 static int dvb_net_ts_callback(const u8 *buffer1, size_t buffer1_len,
 706                                const u8 *buffer2, size_t buffer2_len,
 707                                struct dmx_ts_feed *feed, enum dmx_success success)
 708 {
 709         struct net_device *dev = feed->priv;
 710
 711         if (buffer2 != 0)
 712                 printk(KERN_WARNING "buffer2 not 0: %p.\n", buffer2);
 713         if (buffer1_len > 32768)
 714                 printk(KERN_WARNING "length > 32k: %zu.\n", buffer1_len);
 715         /* printk("TS callback: %u bytes, %u TS cells @ %p.\n",
 716                   buffer1_len, buffer1_len / TS_SZ, buffer1); */
 717         dvb_net_ule(dev, buffer1, buffer1_len);
 718         return 0;
 719 }
 720
 721
 722 static void dvb_net_sec(struct net_device *dev, u8 *pkt, int pkt_len)
 723 {
 724         u8 *eth;
 725         struct sk_buff *skb;
 726         struct net_device_stats *stats = &(((struct dvb_net_priv *) dev->priv)->stats);
 727         int snap = 0;
 728
 729         /* note: pkt_len includes a 32bit checksum */
 730         if (pkt_len < 16) {
 731                 printk("%s: IP/MPE packet length = %d too small.\n",
 732                         dev->name, pkt_len);
 733                 stats->rx_errors++;
 734                 stats->rx_length_errors++;
 735                 return;
 736         }
 737 /* it seems some ISPs manage to screw up here, so we have to
 738  * relax the error checks... */
 739 #if 0
 740         if ((pkt[5] & 0xfd) != 0xc1) {
 741                 /* drop scrambled or broken packets */
 742 #else
 743         if ((pkt[5] & 0x3c) != 0x00) {
 744                 /* drop scrambled */
 745 #endif
 746                 stats->rx_errors++;
 747                 stats->rx_crc_errors++;
 748                 return;
 749         }
 750         if (pkt[5] & 0x02) {
 751                 /* handle LLC/SNAP, see rfc-1042 */
 752                 if (pkt_len < 24 || memcmp(&pkt[12], "\xaa\xaa\x03\0\0\0", 6)) {
 753                         stats->rx_dropped++;
 754                         return;
 755                 }
 756                 snap = 8;
 757         }
 758         if (pkt[7]) {
 759                 /* FIXME: assemble datagram from multiple sections */
 760                 stats->rx_errors++;
 761                 stats->rx_frame_errors++;
 762                 return;
 763         }
 764
 765         /* we have 14 byte ethernet header (ip header follows);
 766          * 12 byte MPE header; 4 byte checksum; + 2 byte alignment, 8 byte LLC/SNAP
 767          */
 768         if (!(skb = dev_alloc_skb(pkt_len - 4 - 12 + 14 + 2 - snap))) {
 769                 //printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n", dev->name);
 770                 stats->rx_dropped++;
 771                 return;
 772         }
 773         skb_reserve(skb, 2);    /* longword align L3 header */
 774         skb->dev = dev;
 775
 776         /* copy L3 payload */
 777         eth = (u8 *) skb_put(skb, pkt_len - 12 - 4 + 14 - snap);
 778         memcpy(eth + 14, pkt + 12 + snap, pkt_len - 12 - 4 - snap);
 779
 780         /* create ethernet header: */
 781         eth[0]=pkt[0x0b];
 782         eth[1]=pkt[0x0a];
 783         eth[2]=pkt[0x09];
 784         eth[3]=pkt[0x08];
 785         eth[4]=pkt[0x04];
 786         eth[5]=pkt[0x03];
 787
 788         eth[6]=eth[7]=eth[8]=eth[9]=eth[10]=eth[11]=0;
 789
 790         if (snap) {
 791                 eth[12] = pkt[18];
 792                 eth[13] = pkt[19];
 793         } else {
 794                 /* protocol numbers are from rfc-1700 or
 795                  * http://www.iana.org/assignments/ethernet-numbers
 796                  */
 797                 if (pkt[12] >> 4 == 6) { /* version field from IP header */
 798                         eth[12] = 0x86; /* IPv6 */
 799                         eth[13] = 0xdd;
 800                 } else {
 801                         eth[12] = 0x08; /* IPv4 */
 802                         eth[13] = 0x00;
 803                 }
 804         }
 805
 806         skb->protocol = dvb_net_eth_type_trans(skb, dev);
 807
 808         stats->rx_packets++;
 809         stats->rx_bytes+=skb->len;
 810         netif_rx(skb);
 811 }
 812
 813 static int dvb_net_sec_callback(const u8 *buffer1, size_t buffer1_len,
 814                  const u8 *buffer2, size_t buffer2_len,
 815                  struct dmx_section_filter *filter,
 816                  enum dmx_success success)
 817 {
 818         struct net_device *dev = filter->priv;
 819
 820         /**
 821          * we rely on the DVB API definition where exactly one complete
 822          * section is delivered in buffer1
 823          */
 824         dvb_net_sec (dev, (u8*) buffer1, buffer1_len);
 825         return 0;
 826 }
 827
 828 static int dvb_net_tx(struct sk_buff *skb, struct net_device *dev)
 829 {
 830         dev_kfree_skb(skb);
 831         return 0;
 832 }
 833
 834 static u8 mask_normal[6]={0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
 835 static u8 mask_allmulti[6]={0xff, 0xff, 0xff, 0x00, 0x00, 0x00};
 836 static u8 mac_allmulti[6]={0x01, 0x00, 0x5e, 0x00, 0x00, 0x00};
 837 static u8 mask_promisc[6]={0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
 838
 839 static int dvb_net_filter_sec_set(struct net_device *dev,
 840                    struct dmx_section_filter **secfilter,
 841                    u8 *mac, u8 *mac_mask)
 842 {
 843         struct dvb_net_priv *priv = dev->priv;
 844         int ret;
 845
 846         *secfilter=NULL;
 847         ret = priv->secfeed->allocate_filter(priv->secfeed, secfilter);
 848         if (ret<0) {
 849                 printk("%s: could not get filter\n", dev->name);
 850                 return ret;
 851         }
 852
 853         (*secfilter)->priv=(void *) dev;
 854
 855         memset((*secfilter)->filter_value, 0x00, DMX_MAX_FILTER_SIZE);
 856         memset((*secfilter)->filter_mask,  0x00, DMX_MAX_FILTER_SIZE);
 857         memset((*secfilter)->filter_mode,  0xff, DMX_MAX_FILTER_SIZE);
 858
 859         (*secfilter)->filter_value[0]=0x3e;
 860         (*secfilter)->filter_value[3]=mac[5];
 861         (*secfilter)->filter_value[4]=mac[4];
 862         (*secfilter)->filter_value[8]=mac[3];
 863         (*secfilter)->filter_value[9]=mac[2];
 864         (*secfilter)->filter_value[10]=mac[1];
 865         (*secfilter)->filter_value[11]=mac[0];
 866
 867         (*secfilter)->filter_mask[0] = 0xff;
 868         (*secfilter)->filter_mask[3] = mac_mask[5];
 869         (*secfilter)->filter_mask[4] = mac_mask[4];
 870         (*secfilter)->filter_mask[8] = mac_mask[3];
 871         (*secfilter)->filter_mask[9] = mac_mask[2];
 872         (*secfilter)->filter_mask[10] = mac_mask[1];
 873         (*secfilter)->filter_mask[11]=mac_mask[0];
 874
 875         dprintk("%s: filter mac=%02x %02x %02x %02x %02x %02x\n",
 876                dev->name, mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
 877         dprintk("%s: filter mask=%02x %02x %02x %02x %02x %02x\n",
 878                dev->name, mac_mask[0], mac_mask[1], mac_mask[2],
 879                mac_mask[3], mac_mask[4], mac_mask[5]);
 880
 881         return 0;
 882 }
 883
 884 static int dvb_net_feed_start(struct net_device *dev)
 885 {
 886         int ret = 0, i;
 887         struct dvb_net_priv *priv = dev->priv;
 888         struct dmx_demux *demux = priv->demux;
 889         unsigned char *mac = (unsigned char *) dev->dev_addr;
 890
 891         dprintk("%s: rx_mode %i\n", __FUNCTION__, priv->rx_mode);
 892         down(&priv->mutex);
 893         if (priv->tsfeed || priv->secfeed || priv->secfilter || priv->multi_secfilter[0])
 894                 printk("%s: BUG %d\n", __FUNCTION__, __LINE__);
 895
 896         priv->secfeed=NULL;
 897         priv->secfilter=NULL;
 898         priv->tsfeed = NULL;
 899
 900         if (priv->feedtype == DVB_NET_FEEDTYPE_MPE) {
 901                 dprintk("%s: alloc secfeed\n", __FUNCTION__);
 902                 ret=demux->allocate_section_feed(demux, &priv->secfeed,
 903                                          dvb_net_sec_callback);
 904                 if (ret<0) {
 905                         printk("%s: could not allocate section feed\n", dev->name);
 906                         goto error;
 907                 }
 908
 909                 ret = priv->secfeed->set(priv->secfeed, priv->pid, 32768, 1);
 910
 911                 if (ret<0) {
 912                         printk("%s: could not set section feed\n", dev->name);
 913                         priv->demux->release_section_feed(priv->demux, priv->secfeed);
 914                         priv->secfeed=NULL;
 915                         goto error;
 916                 }
 917
 918                 if (priv->rx_mode != RX_MODE_PROMISC) {
 919                         dprintk("%s: set secfilter\n", __FUNCTION__);
 920                         dvb_net_filter_sec_set(dev, &priv->secfilter, mac, mask_normal);
 921                 }
 922
 923                 switch (priv->rx_mode) {
 924                 case RX_MODE_MULTI:
 925                         for (i = 0; i < priv->multi_num; i++) {
 926                                 dprintk("%s: set multi_secfilter[%d]\n", __FUNCTION__, i);
 927                                 dvb_net_filter_sec_set(dev, &priv->multi_secfilter[i],
 928                                                        priv->multi_macs[i], mask_normal);
 929                         }
 930                         break;
 931                 case RX_MODE_ALL_MULTI:
 932                         priv->multi_num=1;
 933                         dprintk("%s: set multi_secfilter[0]\n", __FUNCTION__);
 934                         dvb_net_filter_sec_set(dev, &priv->multi_secfilter[0],
 935                                                mac_allmulti, mask_allmulti);
 936                         break;
 937                 case RX_MODE_PROMISC:
 938                         priv->multi_num=0;
 939                         dprintk("%s: set secfilter\n", __FUNCTION__);
 940                         dvb_net_filter_sec_set(dev, &priv->secfilter, mac, mask_promisc);
 941                         break;
 942                 }
 943
 944                 dprintk("%s: start filtering\n", __FUNCTION__);
 945                 priv->secfeed->start_filtering(priv->secfeed);
 946         } else if (priv->feedtype == DVB_NET_FEEDTYPE_ULE) {
 947                 struct timespec timeout = { 0, 30000000 }; // 30 msec
 948
 949                 /* we have payloads encapsulated in TS */
 950                 dprintk("%s: alloc tsfeed\n", __FUNCTION__);
 951                 ret = demux->allocate_ts_feed(demux, &priv->tsfeed, dvb_net_ts_callback);
 952                 if (ret < 0) {
 953                         printk("%s: could not allocate ts feed\n", dev->name);
 954                         goto error;
 955                 }
 956
 957                 /* Set netdevice pointer for ts decaps callback. */
 958                 priv->tsfeed->priv = (void *)dev;
 959                 ret = priv->tsfeed->set(priv->tsfeed, priv->pid,
 960                                         TS_PACKET, DMX_TS_PES_OTHER,
 961                                         32768,     /* circular buffer size */
 962                                         timeout);
 963
 964                 if (ret < 0) {
 965                         printk("%s: could not set ts feed\n", dev->name);
 966                         priv->demux->release_ts_feed(priv->demux, priv->tsfeed);
 967                         priv->tsfeed = NULL;
 968                         goto error;
 969                 }
 970
 971                 dprintk("%s: start filtering\n", __FUNCTION__);
 972                 priv->tsfeed->start_filtering(priv->tsfeed);
 973         } else
 974                 ret = -EINVAL;
 975
 976 error:
 977         up(&priv->mutex);
 978         return ret;
 979 }
 980
 981 static int dvb_net_feed_stop(struct net_device *dev)
 982 {
 983         struct dvb_net_priv *priv = dev->priv;
 984         int i, ret = 0;
 985
 986         dprintk("%s\n", __FUNCTION__);
 987         down(&priv->mutex);
 988         if (priv->feedtype == DVB_NET_FEEDTYPE_MPE) {
 989                 if (priv->secfeed) {
 990                         if (priv->secfeed->is_filtering) {
 991                                 dprintk("%s: stop secfeed\n", __FUNCTION__);
 992                                 priv->secfeed->stop_filtering(priv->secfeed);
 993                         }
 994
 995                         if (priv->secfilter) {
 996                                 dprintk("%s: release secfilter\n", __FUNCTION__);
 997                                 priv->secfeed->release_filter(priv->secfeed,
 998                                                               priv->secfilter);
 999                                 priv->secfilter=NULL;
1000                         }
1001
1002                         for (i=0; i<priv->multi_num; i++) {
1003                                 if (priv->multi_secfilter[i]) {
1004                                         dprintk("%s: release multi_filter[%d]\n",
1005                                                 __FUNCTION__, i);
1006                                         priv->secfeed->release_filter(priv->secfeed,
1007                                                                       priv->multi_secfilter[i]);
1008                                         priv->multi_secfilter[i] = NULL;
1009                                 }
1010                         }
1011
1012                         priv->demux->release_section_feed(priv->demux, priv->secfeed);
1013                         priv->secfeed = NULL;
1014                 } else
1015                         printk("%s: no feed to stop\n", dev->name);
1016         } else if (priv->feedtype == DVB_NET_FEEDTYPE_ULE) {
1017                 if (priv->tsfeed) {
1018                         if (priv->tsfeed->is_filtering) {
1019                                 dprintk("%s: stop tsfeed\n", __FUNCTION__);
1020                                 priv->tsfeed->stop_filtering(priv->tsfeed);
1021                         }
1022                         priv->demux->release_ts_feed(priv->demux, priv->tsfeed);
1023                         priv->tsfeed = NULL;
1024                 }
1025                 else
1026                         printk("%s: no ts feed to stop\n", dev->name);
1027         } else
1028                 ret = -EINVAL;
1029         up(&priv->mutex);
1030         return ret;
1031 }
1032
1033
1034 static int dvb_set_mc_filter (struct net_device *dev, struct dev_mc_list *mc)
1035 {
1036         struct dvb_net_priv *priv = dev->priv;
1037
1038         if (priv->multi_num == DVB_NET_MULTICAST_MAX)
1039                 return -ENOMEM;
1040
1041         memcpy(priv->multi_macs[priv->multi_num], mc->dmi_addr, 6);
1042
1043         priv->multi_num++;
1044         return 0;
1045 }
1046
1047
1048 static void wq_set_multicast_list (void *data)
1049 {
1050         struct net_device *dev = data;
1051         struct dvb_net_priv *priv = dev->priv;
1052
1053         dvb_net_feed_stop(dev);
1054         priv->rx_mode = RX_MODE_UNI;
1055         spin_lock_bh(&dev->xmit_lock);
1056
1057         if (dev->flags & IFF_PROMISC) {
1058                 dprintk("%s: promiscuous mode\n", dev->name);
1059                 priv->rx_mode = RX_MODE_PROMISC;
1060         } else if ((dev->flags & IFF_ALLMULTI)) {
1061                 dprintk("%s: allmulti mode\n", dev->name);
1062                 priv->rx_mode = RX_MODE_ALL_MULTI;
1063         } else if (dev->mc_count) {
1064                 int mci;
1065                 struct dev_mc_list *mc;
1066
1067                 dprintk("%s: set_mc_list, %d entries\n",
1068                         dev->name, dev->mc_count);
1069
1070                 priv->rx_mode = RX_MODE_MULTI;
1071                 priv->multi_num = 0;
1072
1073                 for (mci = 0, mc=dev->mc_list;
1074                      mci < dev->mc_count;
1075                      mc = mc->next, mci++) {
1076                         dvb_set_mc_filter(dev, mc);
1077                 }
1078         }
1079
1080         spin_unlock_bh(&dev->xmit_lock);
1081         dvb_net_feed_start(dev);
1082 }
1083
1084
1085 static void dvb_net_set_multicast_list (struct net_device *dev)
1086 {
1087         struct dvb_net_priv *priv = dev->priv;
1088         schedule_work(&priv->set_multicast_list_wq);
1089 }
1090
1091
1092 static void wq_restart_net_feed (void *data)
1093 {
1094         struct net_device *dev = data;
1095
1096         if (netif_running(dev)) {
1097                 dvb_net_feed_stop(dev);
1098                 dvb_net_feed_start(dev);
1099         }
1100 }
1101
1102
1103 static int dvb_net_set_mac (struct net_device *dev, void *p)
1104 {
1105         struct dvb_net_priv *priv = dev->priv;
1106         struct sockaddr *addr=p;
1107
1108         memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1109
1110         if (netif_running(dev))
1111                 schedule_work(&priv->restart_net_feed_wq);
1112
1113         return 0;
1114 }
1115
1116
1117 static int dvb_net_open(struct net_device *dev)
1118 {
1119         struct dvb_net_priv *priv = dev->priv;
1120
1121         priv->in_use++;
1122         dvb_net_feed_start(dev);
1123         return 0;
1124 }
1125
1126
1127 static int dvb_net_stop(struct net_device *dev)
1128 {
1129         struct dvb_net_priv *priv = dev->priv;
1130
1131         priv->in_use--;
1132         return dvb_net_feed_stop(dev);
1133 }
1134
1135 static struct net_device_stats * dvb_net_get_stats(struct net_device *dev)
1136 {
1137         return &((struct dvb_net_priv*) dev->priv)->stats;
1138 }
1139
1140 static void dvb_net_setup(struct net_device *dev)
1141 {
1142         ether_setup(dev);
1143
1144         dev->open               = dvb_net_open;
1145         dev->stop               = dvb_net_stop;
1146         dev->hard_start_xmit    = dvb_net_tx;
1147         dev->get_stats          = dvb_net_get_stats;
1148         dev->set_multicast_list = dvb_net_set_multicast_list;
1149         dev->set_mac_address    = dvb_net_set_mac;
1150         dev->mtu                = 4096;
1151         dev->mc_count           = 0;
1152         dev->hard_header_cache  = NULL;
1153         dev->flags |= IFF_NOARP;
1154 }
1155
1156 static int get_if(struct dvb_net *dvbnet)
1157 {
1158         int i;
1159
1160         for (i=0; i<DVB_NET_DEVICES_MAX; i++)
1161                 if (!dvbnet->state[i])
1162                         break;
1163
1164         if (i == DVB_NET_DEVICES_MAX)
1165                 return -1;
1166
1167         dvbnet->state[i]=1;
1168         return i;
1169 }
1170
1171 static int dvb_net_add_if(struct dvb_net *dvbnet, u16 pid, u8 feedtype)
1172 {
1173         struct net_device *net;
1174         struct dvb_net_priv *priv;
1175         int result;
1176         int if_num;
1177
1178         if (feedtype != DVB_NET_FEEDTYPE_MPE && feedtype != DVB_NET_FEEDTYPE_ULE)
1179                 return -EINVAL;
1180         if ((if_num = get_if(dvbnet)) < 0)
1181                 return -EINVAL;
1182
1183         net = alloc_netdev(sizeof(struct dvb_net_priv), "dvb", dvb_net_setup);
1184         if (!net)
1185                 return -ENOMEM;
1186
1187         if (dvbnet->dvbdev->id)
1188                 snprintf(net->name, IFNAMSIZ, "dvb%d%u%d",
1189                          dvbnet->dvbdev->adapter->num, dvbnet->dvbdev->id, if_num);
1190         else
1191                 /* compatibility fix to keep dvb0_0 format */
1192                 snprintf(net->name, IFNAMSIZ, "dvb%d_%d",
1193                          dvbnet->dvbdev->adapter->num, if_num);
1194
1195         net->addr_len = 6;
1196         memcpy(net->dev_addr, dvbnet->dvbdev->adapter->proposed_mac, 6);
1197
1198         dvbnet->device[if_num] = net;
1199
1200         priv = net->priv;
1201         priv->demux = dvbnet->demux;
1202         priv->pid = pid;
1203         priv->rx_mode = RX_MODE_UNI;
1204         priv->need_pusi = 1;
1205         priv->tscc = 0;
1206         priv->feedtype = feedtype;
1207         reset_ule(priv);
1208
1209         INIT_WORK(&priv->set_multicast_list_wq, wq_set_multicast_list, net);
1210         INIT_WORK(&priv->restart_net_feed_wq, wq_restart_net_feed, net);
1211         init_MUTEX(&priv->mutex);
1212
1213         net->base_addr = pid;
1214
1215         if ((result = register_netdev(net)) < 0) {
1216                 dvbnet->device[if_num] = NULL;
1217                 free_netdev(net);
1218                 return result;
1219         }
1220         printk("dvb_net: created network interface %s\n", net->name);
1221
1222         return if_num;
1223 }
1224
1225 static int dvb_net_remove_if(struct dvb_net *dvbnet, unsigned int num)
1226 {
1227         struct net_device *net = dvbnet->device[num];
1228         struct dvb_net_priv *priv;
1229
1230         if (!dvbnet->state[num])
1231                 return -EINVAL;
1232         priv = net->priv;
1233         if (priv->in_use)
1234                 return -EBUSY;
1235
1236         dvb_net_stop(net);
1237         flush_scheduled_work();
1238         printk("dvb_net: removed network interface %s\n", net->name);
1239         unregister_netdev(net);
1240         dvbnet->state[num]=0;
1241         dvbnet->device[num] = NULL;
1242         free_netdev(net);
1243
1244         return 0;
1245 }
1246
1247 static int dvb_net_do_ioctl(struct inode *inode, struct file *file,
1248                   unsigned int cmd, void *parg)
1249 {
1250         struct dvb_device *dvbdev = file->private_data;
1251         struct dvb_net *dvbnet = dvbdev->priv;
1252
1253         if (((file->f_flags&O_ACCMODE)==O_RDONLY))
1254                 return -EPERM;
1255
1256         switch (cmd) {
1257         case NET_ADD_IF:
1258         {
1259                 struct dvb_net_if *dvbnetif = parg;
1260                 int result;
1261
1262                 if (!capable(CAP_SYS_ADMIN))
1263                         return -EPERM;
1264
1265                 if (!try_module_get(dvbdev->adapter->module))
1266                         return -EPERM;
1267
1268                 result=dvb_net_add_if(dvbnet, dvbnetif->pid, dvbnetif->feedtype);
1269                 if (result<0) {
1270                         module_put(dvbdev->adapter->module);
1271                         return result;
1272                 }
1273                 dvbnetif->if_num=result;
1274                 break;
1275         }
1276         case NET_GET_IF:
1277         {
1278                 struct net_device *netdev;
1279                 struct dvb_net_priv *priv_data;
1280                 struct dvb_net_if *dvbnetif = parg;
1281
1282                 if (dvbnetif->if_num >= DVB_NET_DEVICES_MAX ||
1283                     !dvbnet->state[dvbnetif->if_num])
1284                         return -EINVAL;
1285
1286                 netdev = dvbnet->device[dvbnetif->if_num];
1287
1288                 priv_data = netdev->priv;
1289                 dvbnetif->pid=priv_data->pid;
1290                 dvbnetif->feedtype=priv_data->feedtype;
1291                 break;
1292         }
1293         case NET_REMOVE_IF:
1294         {
1295                 int ret;
1296
1297                 if (!capable(CAP_SYS_ADMIN))
1298                         return -EPERM;
1299                 if ((unsigned long) parg >= DVB_NET_DEVICES_MAX)
1300                         return -EINVAL;
1301                 ret = dvb_net_remove_if(dvbnet, (unsigned long) parg);
1302                 if (!ret)
1303                         module_put(dvbdev->adapter->module);
1304                 return ret;
1305         }
1306
1307         /* binary compatiblity cruft */
1308         case __NET_ADD_IF_OLD:
1309         {
1310                 struct __dvb_net_if_old *dvbnetif = parg;
1311                 int result;
1312
1313                 if (!capable(CAP_SYS_ADMIN))
1314                         return -EPERM;
1315
1316                 if (!try_module_get(dvbdev->adapter->module))
1317                         return -EPERM;
1318
1319                 result=dvb_net_add_if(dvbnet, dvbnetif->pid, DVB_NET_FEEDTYPE_MPE);
1320                 if (result<0) {
1321                         module_put(dvbdev->adapter->module);
1322                         return result;
1323                 }
1324                 dvbnetif->if_num=result;
1325                 break;
1326         }
1327         case __NET_GET_IF_OLD:
1328         {
1329                 struct net_device *netdev;
1330                 struct dvb_net_priv *priv_data;
1331                 struct __dvb_net_if_old *dvbnetif = parg;
1332
1333                 if (dvbnetif->if_num >= DVB_NET_DEVICES_MAX ||
1334                     !dvbnet->state[dvbnetif->if_num])
1335                         return -EINVAL;
1336
1337                 netdev = dvbnet->device[dvbnetif->if_num];
1338
1339                 priv_data = netdev->priv;
1340                 dvbnetif->pid=priv_data->pid;
1341                 break;
1342         }
1343         default:
1344                 return -ENOTTY;
1345         }
1346         return 0;
1347 }
1348
1349 static int dvb_net_ioctl(struct inode *inode, struct file *file,
1350               unsigned int cmd, unsigned long arg)
1351 {
1352         return dvb_usercopy(inode, file, cmd, arg, dvb_net_do_ioctl);
1353 }
1354
1355 static struct file_operations dvb_net_fops = {
1356         .owner = THIS_MODULE,
1357         .ioctl = dvb_net_ioctl,
1358         .open = dvb_generic_open,
1359         .release = dvb_generic_release,
1360 };
1361
1362 static struct dvb_device dvbdev_net = {
1363         .priv = NULL,
1364         .users = 1,
1365         .writers = 1,
1366         .fops = &dvb_net_fops,
1367 };
1368
1369
1370 void dvb_net_release (struct dvb_net *dvbnet)
1371 {
1372         int i;
1373
1374         dvb_unregister_device(dvbnet->dvbdev);
1375
1376         for (i=0; i<DVB_NET_DEVICES_MAX; i++) {
1377                 if (!dvbnet->state[i])
1378                         continue;
1379                 dvb_net_remove_if(dvbnet, i);
1380         }
1381 }
1382 EXPORT_SYMBOL(dvb_net_release);
1383
1384
1385 int dvb_net_init (struct dvb_adapter *adap, struct dvb_net *dvbnet,
1386                   struct dmx_demux *dmx)
1387 {
1388         int i;
1389
1390         dvbnet->demux = dmx;
1391
1392         for (i=0; i<DVB_NET_DEVICES_MAX; i++)
1393                 dvbnet->state[i] = 0;
1394
1395         dvb_register_device (adap, &dvbnet->dvbdev, &dvbdev_net,
1396                              dvbnet, DVB_DEVICE_NET);
1397
1398         return 0;
1399 }
1400 EXPORT_SYMBOL(dvb_net_init);