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