| 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 inline __u32 iov_crc32( __u32 c, struct kvec *iov, unsigned int cnt ) |
| 72 | { |
| 73 | unsigned int j; |
| 74 | for (j = 0; j < cnt; j++) |
| 75 | c = crc32_be( c, iov[j].iov_base, iov[j].iov_len ); |
| 76 | return c; |
| 77 | } |
| 78 | |
| 79 | |
| 80 | #define DVB_NET_MULTICAST_MAX 10 |
| 81 | |
| 82 | #undef ULE_DEBUG |
| 83 | |
| 84 | #ifdef ULE_DEBUG |
| 85 | |
| 86 | static void hexdump(const unsigned char *buf, unsigned short len) |
| 87 | { |
| 88 | print_hex_dump_debug("", DUMP_PREFIX_OFFSET, 16, 1, buf, len, true); |
| 89 | } |
| 90 | |
| 91 | #endif |
| 92 | |
| 93 | struct dvb_net_priv { |
| 94 | int in_use; |
| 95 | u16 pid; |
| 96 | struct net_device *net; |
| 97 | struct dvb_net *host; |
| 98 | struct dmx_demux *demux; |
| 99 | struct dmx_section_feed *secfeed; |
| 100 | struct dmx_section_filter *secfilter; |
| 101 | struct dmx_ts_feed *tsfeed; |
| 102 | int multi_num; |
| 103 | struct dmx_section_filter *multi_secfilter[DVB_NET_MULTICAST_MAX]; |
| 104 | unsigned char multi_macs[DVB_NET_MULTICAST_MAX][6]; |
| 105 | int rx_mode; |
| 106 | #define RX_MODE_UNI 0 |
| 107 | #define RX_MODE_MULTI 1 |
| 108 | #define RX_MODE_ALL_MULTI 2 |
| 109 | #define RX_MODE_PROMISC 3 |
| 110 | struct work_struct set_multicast_list_wq; |
| 111 | struct work_struct restart_net_feed_wq; |
| 112 | unsigned char feedtype; /* Either FEED_TYPE_ or FEED_TYPE_ULE */ |
| 113 | int need_pusi; /* Set to 1, if synchronization on PUSI required. */ |
| 114 | unsigned char tscc; /* TS continuity counter after sync on PUSI. */ |
| 115 | struct sk_buff *ule_skb; /* ULE SNDU decodes into this buffer. */ |
| 116 | unsigned char *ule_next_hdr; /* Pointer into skb to next ULE extension header. */ |
| 117 | unsigned short ule_sndu_len; /* ULE SNDU length in bytes, w/o D-Bit. */ |
| 118 | unsigned short ule_sndu_type; /* ULE SNDU type field, complete. */ |
| 119 | unsigned char ule_sndu_type_1; /* ULE SNDU type field, if split across 2 TS cells. */ |
| 120 | unsigned char ule_dbit; /* Whether the DestMAC address present |
| 121 | * or not (bit is set). */ |
| 122 | unsigned char ule_bridged; /* Whether the ULE_BRIDGED extension header was found. */ |
| 123 | int ule_sndu_remain; /* Nr. of bytes still required for current ULE SNDU. */ |
| 124 | unsigned long ts_count; /* Current ts cell counter. */ |
| 125 | struct mutex mutex; |
| 126 | }; |
| 127 | |
| 128 | |
| 129 | /** |
| 130 | * Determine the packet's protocol ID. The rule here is that we |
| 131 | * assume 802.3 if the type field is short enough to be a length. |
| 132 | * This is normal practice and works for any 'now in use' protocol. |
| 133 | * |
| 134 | * stolen from eth.c out of the linux kernel, hacked for dvb-device |
| 135 | * by Michael Holzt <kju@debian.org> |
| 136 | */ |
| 137 | static __be16 dvb_net_eth_type_trans(struct sk_buff *skb, |
| 138 | struct net_device *dev) |
| 139 | { |
| 140 | struct ethhdr *eth; |
| 141 | unsigned char *rawp; |
| 142 | |
| 143 | skb_reset_mac_header(skb); |
| 144 | skb_pull(skb,dev->hard_header_len); |
| 145 | eth = eth_hdr(skb); |
| 146 | |
| 147 | if (*eth->h_dest & 1) { |
| 148 | if(ether_addr_equal(eth->h_dest,dev->broadcast)) |
| 149 | skb->pkt_type=PACKET_BROADCAST; |
| 150 | else |
| 151 | skb->pkt_type=PACKET_MULTICAST; |
| 152 | } |
| 153 | |
| 154 | if (ntohs(eth->h_proto) >= ETH_P_802_3_MIN) |
| 155 | return eth->h_proto; |
| 156 | |
| 157 | rawp = skb->data; |
| 158 | |
| 159 | /** |
| 160 | * This is a magic hack to spot IPX packets. Older Novell breaks |
| 161 | * the protocol design and runs IPX over 802.3 without an 802.2 LLC |
| 162 | * layer. We look for FFFF which isn't a used 802.2 SSAP/DSAP. This |
| 163 | * won't work for fault tolerant netware but does for the rest. |
| 164 | */ |
| 165 | if (*(unsigned short *)rawp == 0xFFFF) |
| 166 | return htons(ETH_P_802_3); |
| 167 | |
| 168 | /** |
| 169 | * Real 802.2 LLC |
| 170 | */ |
| 171 | return htons(ETH_P_802_2); |
| 172 | } |
| 173 | |
| 174 | #define TS_SZ 188 |
| 175 | #define TS_SYNC 0x47 |
| 176 | #define TS_TEI 0x80 |
| 177 | #define TS_SC 0xC0 |
| 178 | #define TS_PUSI 0x40 |
| 179 | #define TS_AF_A 0x20 |
| 180 | #define TS_AF_D 0x10 |
| 181 | |
| 182 | /* ULE Extension Header handlers. */ |
| 183 | |
| 184 | #define ULE_TEST 0 |
| 185 | #define ULE_BRIDGED 1 |
| 186 | |
| 187 | #define ULE_OPTEXTHDR_PADDING 0 |
| 188 | |
| 189 | static int ule_test_sndu( struct dvb_net_priv *p ) |
| 190 | { |
| 191 | return -1; |
| 192 | } |
| 193 | |
| 194 | static int ule_bridged_sndu( struct dvb_net_priv *p ) |
| 195 | { |
| 196 | struct ethhdr *hdr = (struct ethhdr*) p->ule_next_hdr; |
| 197 | if(ntohs(hdr->h_proto) < ETH_P_802_3_MIN) { |
| 198 | int framelen = p->ule_sndu_len - ((p->ule_next_hdr+sizeof(struct ethhdr)) - p->ule_skb->data); |
| 199 | /* A frame Type < ETH_P_802_3_MIN for a bridged frame, introduces a LLC Length field. */ |
| 200 | if(framelen != ntohs(hdr->h_proto)) { |
| 201 | return -1; |
| 202 | } |
| 203 | } |
| 204 | /* Note: |
| 205 | * From RFC4326: |
| 206 | * "A bridged SNDU is a Mandatory Extension Header of Type 1. |
| 207 | * It must be the final (or only) extension header specified in the header chain of a SNDU." |
| 208 | * The 'ule_bridged' flag will cause the extension header processing loop to terminate. |
| 209 | */ |
| 210 | p->ule_bridged = 1; |
| 211 | return 0; |
| 212 | } |
| 213 | |
| 214 | static int ule_exthdr_padding(struct dvb_net_priv *p) |
| 215 | { |
| 216 | return 0; |
| 217 | } |
| 218 | |
| 219 | /** Handle ULE extension headers. |
| 220 | * Function is called after a successful CRC32 verification of an ULE SNDU to complete its decoding. |
| 221 | * Returns: >= 0: nr. of bytes consumed by next extension header |
| 222 | * -1: Mandatory extension header that is not recognized or TEST SNDU; discard. |
| 223 | */ |
| 224 | static int handle_one_ule_extension( struct dvb_net_priv *p ) |
| 225 | { |
| 226 | /* Table of mandatory extension header handlers. The header type is the index. */ |
| 227 | static int (*ule_mandatory_ext_handlers[255])( struct dvb_net_priv *p ) = |
| 228 | { [0] = ule_test_sndu, [1] = ule_bridged_sndu, [2] = NULL, }; |
| 229 | |
| 230 | /* Table of optional extension header handlers. The header type is the index. */ |
| 231 | static int (*ule_optional_ext_handlers[255])( struct dvb_net_priv *p ) = |
| 232 | { [0] = ule_exthdr_padding, [1] = NULL, }; |
| 233 | |
| 234 | int ext_len = 0; |
| 235 | unsigned char hlen = (p->ule_sndu_type & 0x0700) >> 8; |
| 236 | unsigned char htype = p->ule_sndu_type & 0x00FF; |
| 237 | |
| 238 | /* Discriminate mandatory and optional extension headers. */ |
| 239 | if (hlen == 0) { |
| 240 | /* Mandatory extension header */ |
| 241 | if (ule_mandatory_ext_handlers[htype]) { |
| 242 | ext_len = ule_mandatory_ext_handlers[htype]( p ); |
| 243 | if(ext_len >= 0) { |
| 244 | p->ule_next_hdr += ext_len; |
| 245 | if (!p->ule_bridged) { |
| 246 | p->ule_sndu_type = ntohs(*(__be16 *)p->ule_next_hdr); |
| 247 | p->ule_next_hdr += 2; |
| 248 | } else { |
| 249 | p->ule_sndu_type = ntohs(*(__be16 *)(p->ule_next_hdr + ((p->ule_dbit ? 2 : 3) * ETH_ALEN))); |
| 250 | /* This assures the extension handling loop will terminate. */ |
| 251 | } |
| 252 | } |
| 253 | // else: extension handler failed or SNDU should be discarded |
| 254 | } else |
| 255 | ext_len = -1; /* SNDU has to be discarded. */ |
| 256 | } else { |
| 257 | /* Optional extension header. Calculate the length. */ |
| 258 | ext_len = hlen << 1; |
| 259 | /* Process the optional extension header according to its type. */ |
| 260 | if (ule_optional_ext_handlers[htype]) |
| 261 | (void)ule_optional_ext_handlers[htype]( p ); |
| 262 | p->ule_next_hdr += ext_len; |
| 263 | p->ule_sndu_type = ntohs( *(__be16 *)(p->ule_next_hdr-2) ); |
| 264 | /* |
| 265 | * note: the length of the next header type is included in the |
| 266 | * length of THIS optional extension header |
| 267 | */ |
| 268 | } |
| 269 | |
| 270 | return ext_len; |
| 271 | } |
| 272 | |
| 273 | static int handle_ule_extensions( struct dvb_net_priv *p ) |
| 274 | { |
| 275 | int total_ext_len = 0, l; |
| 276 | |
| 277 | p->ule_next_hdr = p->ule_skb->data; |
| 278 | do { |
| 279 | l = handle_one_ule_extension( p ); |
| 280 | if (l < 0) |
| 281 | return l; /* Stop extension header processing and discard SNDU. */ |
| 282 | total_ext_len += l; |
| 283 | #ifdef ULE_DEBUG |
| 284 | pr_debug("ule_next_hdr=%p, ule_sndu_type=%i, l=%i, total_ext_len=%i\n", |
| 285 | p->ule_next_hdr, (int)p->ule_sndu_type, |
| 286 | l, total_ext_len); |
| 287 | #endif |
| 288 | |
| 289 | } while (p->ule_sndu_type < ETH_P_802_3_MIN); |
| 290 | |
| 291 | return total_ext_len; |
| 292 | } |
| 293 | |
| 294 | |
| 295 | /** Prepare for a new ULE SNDU: reset the decoder state. */ |
| 296 | static inline void reset_ule( struct dvb_net_priv *p ) |
| 297 | { |
| 298 | p->ule_skb = NULL; |
| 299 | p->ule_next_hdr = NULL; |
| 300 | p->ule_sndu_len = 0; |
| 301 | p->ule_sndu_type = 0; |
| 302 | p->ule_sndu_type_1 = 0; |
| 303 | p->ule_sndu_remain = 0; |
| 304 | p->ule_dbit = 0xFF; |
| 305 | p->ule_bridged = 0; |
| 306 | } |
| 307 | |
| 308 | /** |
| 309 | * Decode ULE SNDUs according to draft-ietf-ipdvb-ule-03.txt from a sequence of |
| 310 | * TS cells of a single PID. |
| 311 | */ |
| 312 | static void dvb_net_ule( struct net_device *dev, const u8 *buf, size_t buf_len ) |
| 313 | { |
| 314 | struct dvb_net_priv *priv = netdev_priv(dev); |
| 315 | unsigned long skipped = 0L; |
| 316 | const u8 *ts, *ts_end, *from_where = NULL; |
| 317 | u8 ts_remain = 0, how_much = 0, new_ts = 1; |
| 318 | struct ethhdr *ethh = NULL; |
| 319 | bool error = false; |
| 320 | |
| 321 | #ifdef ULE_DEBUG |
| 322 | /* The code inside ULE_DEBUG keeps a history of the last 100 TS cells processed. */ |
| 323 | static unsigned char ule_hist[100*TS_SZ]; |
| 324 | static unsigned char *ule_where = ule_hist, ule_dump; |
| 325 | #endif |
| 326 | |
| 327 | /* For all TS cells in current buffer. |
| 328 | * Appearently, we are called for every single TS cell. |
| 329 | */ |
| 330 | for (ts = buf, ts_end = buf + buf_len; ts < ts_end; /* no default incr. */ ) { |
| 331 | |
| 332 | if (new_ts) { |
| 333 | /* We are about to process a new TS cell. */ |
| 334 | |
| 335 | #ifdef ULE_DEBUG |
| 336 | if (ule_where >= &ule_hist[100*TS_SZ]) ule_where = ule_hist; |
| 337 | memcpy( ule_where, ts, TS_SZ ); |
| 338 | if (ule_dump) { |
| 339 | hexdump( ule_where, TS_SZ ); |
| 340 | ule_dump = 0; |
| 341 | } |
| 342 | ule_where += TS_SZ; |
| 343 | #endif |
| 344 | |
| 345 | /* Check TS error conditions: sync_byte, transport_error_indicator, scrambling_control . */ |
| 346 | if ((ts[0] != TS_SYNC) || (ts[1] & TS_TEI) || ((ts[3] & TS_SC) != 0)) { |
| 347 | printk(KERN_WARNING "%lu: Invalid TS cell: SYNC %#x, TEI %u, SC %#x.\n", |
| 348 | priv->ts_count, ts[0], |
| 349 | (ts[1] & TS_TEI) >> 7, |
| 350 | (ts[3] & TS_SC) >> 6); |
| 351 | |
| 352 | /* Drop partly decoded SNDU, reset state, resync on PUSI. */ |
| 353 | if (priv->ule_skb) { |
| 354 | dev_kfree_skb( priv->ule_skb ); |
| 355 | /* Prepare for next SNDU. */ |
| 356 | dev->stats.rx_errors++; |
| 357 | dev->stats.rx_frame_errors++; |
| 358 | } |
| 359 | reset_ule(priv); |
| 360 | priv->need_pusi = 1; |
| 361 | |
| 362 | /* Continue with next TS cell. */ |
| 363 | ts += TS_SZ; |
| 364 | priv->ts_count++; |
| 365 | continue; |
| 366 | } |
| 367 | |
| 368 | ts_remain = 184; |
| 369 | from_where = ts + 4; |
| 370 | } |
| 371 | /* Synchronize on PUSI, if required. */ |
| 372 | if (priv->need_pusi) { |
| 373 | if (ts[1] & TS_PUSI) { |
| 374 | /* Find beginning of first ULE SNDU in current TS cell. */ |
| 375 | /* Synchronize continuity counter. */ |
| 376 | priv->tscc = ts[3] & 0x0F; |
| 377 | /* There is a pointer field here. */ |
| 378 | if (ts[4] > ts_remain) { |
| 379 | printk(KERN_ERR "%lu: Invalid ULE packet " |
| 380 | "(pointer field %d)\n", priv->ts_count, ts[4]); |
| 381 | ts += TS_SZ; |
| 382 | priv->ts_count++; |
| 383 | continue; |
| 384 | } |
| 385 | /* Skip to destination of pointer field. */ |
| 386 | from_where = &ts[5] + ts[4]; |
| 387 | ts_remain -= 1 + ts[4]; |
| 388 | skipped = 0; |
| 389 | } else { |
| 390 | skipped++; |
| 391 | ts += TS_SZ; |
| 392 | priv->ts_count++; |
| 393 | continue; |
| 394 | } |
| 395 | } |
| 396 | |
| 397 | if (new_ts) { |
| 398 | /* Check continuity counter. */ |
| 399 | if ((ts[3] & 0x0F) == priv->tscc) |
| 400 | priv->tscc = (priv->tscc + 1) & 0x0F; |
| 401 | else { |
| 402 | /* TS discontinuity handling: */ |
| 403 | printk(KERN_WARNING "%lu: TS discontinuity: got %#x, " |
| 404 | "expected %#x.\n", priv->ts_count, ts[3] & 0x0F, priv->tscc); |
| 405 | /* Drop partly decoded SNDU, reset state, resync on PUSI. */ |
| 406 | if (priv->ule_skb) { |
| 407 | dev_kfree_skb( priv->ule_skb ); |
| 408 | /* Prepare for next SNDU. */ |
| 409 | // reset_ule(priv); moved to below. |
| 410 | dev->stats.rx_errors++; |
| 411 | dev->stats.rx_frame_errors++; |
| 412 | } |
| 413 | reset_ule(priv); |
| 414 | /* skip to next PUSI. */ |
| 415 | priv->need_pusi = 1; |
| 416 | continue; |
| 417 | } |
| 418 | /* If we still have an incomplete payload, but PUSI is |
| 419 | * set; some TS cells are missing. |
| 420 | * This is only possible here, if we missed exactly 16 TS |
| 421 | * cells (continuity counter wrap). */ |
| 422 | if (ts[1] & TS_PUSI) { |
| 423 | if (! priv->need_pusi) { |
| 424 | if (!(*from_where < (ts_remain-1)) || *from_where != priv->ule_sndu_remain) { |
| 425 | /* Pointer field is invalid. Drop this TS cell and any started ULE SNDU. */ |
| 426 | printk(KERN_WARNING "%lu: Invalid pointer " |
| 427 | "field: %u.\n", priv->ts_count, *from_where); |
| 428 | |
| 429 | /* Drop partly decoded SNDU, reset state, resync on PUSI. */ |
| 430 | if (priv->ule_skb) { |
| 431 | error = true; |
| 432 | dev_kfree_skb(priv->ule_skb); |
| 433 | } |
| 434 | |
| 435 | if (error || priv->ule_sndu_remain) { |
| 436 | dev->stats.rx_errors++; |
| 437 | dev->stats.rx_frame_errors++; |
| 438 | error = false; |
| 439 | } |
| 440 | |
| 441 | reset_ule(priv); |
| 442 | priv->need_pusi = 1; |
| 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 | dev->stats.rx_errors++; |
| 456 | dev->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 | ts += TS_SZ; |
| 483 | continue; |
| 484 | } |
| 485 | |
| 486 | if (! priv->ule_sndu_len) { |
| 487 | /* Got at least two bytes, thus extrace the SNDU length. */ |
| 488 | priv->ule_sndu_len = from_where[0] << 8 | from_where[1]; |
| 489 | if (priv->ule_sndu_len & 0x8000) { |
| 490 | /* D-Bit is set: no dest mac present. */ |
| 491 | priv->ule_sndu_len &= 0x7FFF; |
| 492 | priv->ule_dbit = 1; |
| 493 | } else |
| 494 | priv->ule_dbit = 0; |
| 495 | |
| 496 | if (priv->ule_sndu_len < 5) { |
| 497 | printk(KERN_WARNING "%lu: Invalid ULE SNDU length %u. " |
| 498 | "Resyncing.\n", priv->ts_count, priv->ule_sndu_len); |
| 499 | dev->stats.rx_errors++; |
| 500 | dev->stats.rx_length_errors++; |
| 501 | priv->ule_sndu_len = 0; |
| 502 | priv->need_pusi = 1; |
| 503 | new_ts = 1; |
| 504 | ts += TS_SZ; |
| 505 | priv->ts_count++; |
| 506 | continue; |
| 507 | } |
| 508 | ts_remain -= 2; /* consume the 2 bytes SNDU length. */ |
| 509 | from_where += 2; |
| 510 | } |
| 511 | |
| 512 | priv->ule_sndu_remain = priv->ule_sndu_len + 2; |
| 513 | /* |
| 514 | * State of current TS: |
| 515 | * ts_remain (remaining bytes in the current TS cell) |
| 516 | * 0 ule_type is not available now, we need the next TS cell |
| 517 | * 1 the first byte of the ule_type is present |
| 518 | * >=2 full ULE header present, maybe some payload data as well. |
| 519 | */ |
| 520 | switch (ts_remain) { |
| 521 | case 1: |
| 522 | priv->ule_sndu_remain--; |
| 523 | priv->ule_sndu_type = from_where[0] << 8; |
| 524 | priv->ule_sndu_type_1 = 1; /* first byte of ule_type is set. */ |
| 525 | ts_remain -= 1; from_where += 1; |
| 526 | /* Continue w/ next TS. */ |
| 527 | case 0: |
| 528 | new_ts = 1; |
| 529 | ts += TS_SZ; |
| 530 | priv->ts_count++; |
| 531 | continue; |
| 532 | |
| 533 | default: /* complete ULE header is present in current TS. */ |
| 534 | /* Extract ULE type field. */ |
| 535 | if (priv->ule_sndu_type_1) { |
| 536 | priv->ule_sndu_type_1 = 0; |
| 537 | priv->ule_sndu_type |= from_where[0]; |
| 538 | from_where += 1; /* points to payload start. */ |
| 539 | ts_remain -= 1; |
| 540 | } else { |
| 541 | /* Complete type is present in new TS. */ |
| 542 | priv->ule_sndu_type = from_where[0] << 8 | from_where[1]; |
| 543 | from_where += 2; /* points to payload start. */ |
| 544 | ts_remain -= 2; |
| 545 | } |
| 546 | break; |
| 547 | } |
| 548 | |
| 549 | /* Allocate the skb (decoder target buffer) with the correct size, as follows: |
| 550 | * prepare for the largest case: bridged SNDU with MAC address (dbit = 0). */ |
| 551 | priv->ule_skb = dev_alloc_skb( priv->ule_sndu_len + ETH_HLEN + ETH_ALEN ); |
| 552 | if (priv->ule_skb == NULL) { |
| 553 | printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n", |
| 554 | dev->name); |
| 555 | dev->stats.rx_dropped++; |
| 556 | return; |
| 557 | } |
| 558 | |
| 559 | /* This includes the CRC32 _and_ dest mac, if !dbit. */ |
| 560 | priv->ule_sndu_remain = priv->ule_sndu_len; |
| 561 | priv->ule_skb->dev = dev; |
| 562 | /* Leave space for Ethernet or bridged SNDU header (eth hdr plus one MAC addr). */ |
| 563 | skb_reserve( priv->ule_skb, ETH_HLEN + ETH_ALEN ); |
| 564 | } |
| 565 | |
| 566 | /* Copy data into our current skb. */ |
| 567 | how_much = min(priv->ule_sndu_remain, (int)ts_remain); |
| 568 | memcpy(skb_put(priv->ule_skb, how_much), from_where, how_much); |
| 569 | priv->ule_sndu_remain -= how_much; |
| 570 | ts_remain -= how_much; |
| 571 | from_where += how_much; |
| 572 | |
| 573 | /* Check for complete payload. */ |
| 574 | if (priv->ule_sndu_remain <= 0) { |
| 575 | /* Check CRC32, we've got it in our skb already. */ |
| 576 | __be16 ulen = htons(priv->ule_sndu_len); |
| 577 | __be16 utype = htons(priv->ule_sndu_type); |
| 578 | const u8 *tail; |
| 579 | struct kvec iov[3] = { |
| 580 | { &ulen, sizeof ulen }, |
| 581 | { &utype, sizeof utype }, |
| 582 | { priv->ule_skb->data, priv->ule_skb->len - 4 } |
| 583 | }; |
| 584 | u32 ule_crc = ~0L, expected_crc; |
| 585 | if (priv->ule_dbit) { |
| 586 | /* Set D-bit for CRC32 verification, |
| 587 | * if it was set originally. */ |
| 588 | ulen |= htons(0x8000); |
| 589 | } |
| 590 | |
| 591 | ule_crc = iov_crc32(ule_crc, iov, 3); |
| 592 | tail = skb_tail_pointer(priv->ule_skb); |
| 593 | expected_crc = *(tail - 4) << 24 | |
| 594 | *(tail - 3) << 16 | |
| 595 | *(tail - 2) << 8 | |
| 596 | *(tail - 1); |
| 597 | if (ule_crc != expected_crc) { |
| 598 | printk(KERN_WARNING "%lu: CRC32 check FAILED: %08x / %08x, SNDU len %d type %#x, ts_remain %d, next 2: %x.\n", |
| 599 | 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); |
| 600 | |
| 601 | #ifdef ULE_DEBUG |
| 602 | hexdump( iov[0].iov_base, iov[0].iov_len ); |
| 603 | hexdump( iov[1].iov_base, iov[1].iov_len ); |
| 604 | hexdump( iov[2].iov_base, iov[2].iov_len ); |
| 605 | |
| 606 | if (ule_where == ule_hist) { |
| 607 | hexdump( &ule_hist[98*TS_SZ], TS_SZ ); |
| 608 | hexdump( &ule_hist[99*TS_SZ], TS_SZ ); |
| 609 | } else if (ule_where == &ule_hist[TS_SZ]) { |
| 610 | hexdump( &ule_hist[99*TS_SZ], TS_SZ ); |
| 611 | hexdump( ule_hist, TS_SZ ); |
| 612 | } else { |
| 613 | hexdump( ule_where - TS_SZ - TS_SZ, TS_SZ ); |
| 614 | hexdump( ule_where - TS_SZ, TS_SZ ); |
| 615 | } |
| 616 | ule_dump = 1; |
| 617 | #endif |
| 618 | |
| 619 | dev->stats.rx_errors++; |
| 620 | dev->stats.rx_crc_errors++; |
| 621 | dev_kfree_skb(priv->ule_skb); |
| 622 | } else { |
| 623 | /* CRC32 verified OK. */ |
| 624 | u8 dest_addr[ETH_ALEN]; |
| 625 | static const u8 bc_addr[ETH_ALEN] = |
| 626 | { [ 0 ... ETH_ALEN-1] = 0xff }; |
| 627 | |
| 628 | /* CRC32 was OK. Remove it from skb. */ |
| 629 | priv->ule_skb->tail -= 4; |
| 630 | priv->ule_skb->len -= 4; |
| 631 | |
| 632 | if (!priv->ule_dbit) { |
| 633 | /* |
| 634 | * The destination MAC address is the |
| 635 | * next data in the skb. It comes |
| 636 | * before any extension headers. |
| 637 | * |
| 638 | * Check if the payload of this SNDU |
| 639 | * should be passed up the stack. |
| 640 | */ |
| 641 | register int drop = 0; |
| 642 | if (priv->rx_mode != RX_MODE_PROMISC) { |
| 643 | if (priv->ule_skb->data[0] & 0x01) { |
| 644 | /* multicast or broadcast */ |
| 645 | if (!ether_addr_equal(priv->ule_skb->data, bc_addr)) { |
| 646 | /* multicast */ |
| 647 | if (priv->rx_mode == RX_MODE_MULTI) { |
| 648 | int i; |
| 649 | for(i = 0; i < priv->multi_num && |
| 650 | !ether_addr_equal(priv->ule_skb->data, |
| 651 | priv->multi_macs[i]); i++) |
| 652 | ; |
| 653 | if (i == priv->multi_num) |
| 654 | drop = 1; |
| 655 | } else if (priv->rx_mode != RX_MODE_ALL_MULTI) |
| 656 | drop = 1; /* no broadcast; */ |
| 657 | /* else: all multicast mode: accept all multicast packets */ |
| 658 | } |
| 659 | /* else: broadcast */ |
| 660 | } |
| 661 | else if (!ether_addr_equal(priv->ule_skb->data, dev->dev_addr)) |
| 662 | drop = 1; |
| 663 | /* else: destination address matches the MAC address of our receiver device */ |
| 664 | } |
| 665 | /* else: promiscuous mode; pass everything up the stack */ |
| 666 | |
| 667 | if (drop) { |
| 668 | #ifdef ULE_DEBUG |
| 669 | netdev_dbg(dev, "Dropping SNDU: MAC destination address does not match: dest addr: %pM, dev addr: %pM\n", |
| 670 | priv->ule_skb->data, dev->dev_addr); |
| 671 | #endif |
| 672 | dev_kfree_skb(priv->ule_skb); |
| 673 | goto sndu_done; |
| 674 | } |
| 675 | else |
| 676 | { |
| 677 | skb_copy_from_linear_data(priv->ule_skb, |
| 678 | dest_addr, |
| 679 | ETH_ALEN); |
| 680 | skb_pull(priv->ule_skb, ETH_ALEN); |
| 681 | } |
| 682 | } |
| 683 | |
| 684 | /* Handle ULE Extension Headers. */ |
| 685 | if (priv->ule_sndu_type < ETH_P_802_3_MIN) { |
| 686 | /* There is an extension header. Handle it accordingly. */ |
| 687 | int l = handle_ule_extensions(priv); |
| 688 | if (l < 0) { |
| 689 | /* Mandatory extension header unknown or TEST SNDU. Drop it. */ |
| 690 | // printk( KERN_WARNING "Dropping SNDU, extension headers.\n" ); |
| 691 | dev_kfree_skb(priv->ule_skb); |
| 692 | goto sndu_done; |
| 693 | } |
| 694 | skb_pull(priv->ule_skb, l); |
| 695 | } |
| 696 | |
| 697 | /* |
| 698 | * Construct/assure correct ethernet header. |
| 699 | * Note: in bridged mode (priv->ule_bridged != |
| 700 | * 0) we already have the (original) ethernet |
| 701 | * header at the start of the payload (after |
| 702 | * optional dest. address and any extension |
| 703 | * headers). |
| 704 | */ |
| 705 | |
| 706 | if (!priv->ule_bridged) { |
| 707 | skb_push(priv->ule_skb, ETH_HLEN); |
| 708 | ethh = (struct ethhdr *)priv->ule_skb->data; |
| 709 | if (!priv->ule_dbit) { |
| 710 | /* dest_addr buffer is only valid if priv->ule_dbit == 0 */ |
| 711 | memcpy(ethh->h_dest, dest_addr, ETH_ALEN); |
| 712 | eth_zero_addr(ethh->h_source); |
| 713 | } |
| 714 | else /* zeroize source and dest */ |
| 715 | memset( ethh, 0, ETH_ALEN*2 ); |
| 716 | |
| 717 | ethh->h_proto = htons(priv->ule_sndu_type); |
| 718 | } |
| 719 | /* else: skb is in correct state; nothing to do. */ |
| 720 | priv->ule_bridged = 0; |
| 721 | |
| 722 | /* Stuff into kernel's protocol stack. */ |
| 723 | priv->ule_skb->protocol = dvb_net_eth_type_trans(priv->ule_skb, dev); |
| 724 | /* If D-bit is set (i.e. destination MAC address not present), |
| 725 | * receive the packet anyhow. */ |
| 726 | /* if (priv->ule_dbit && skb->pkt_type == PACKET_OTHERHOST) |
| 727 | priv->ule_skb->pkt_type = PACKET_HOST; */ |
| 728 | dev->stats.rx_packets++; |
| 729 | dev->stats.rx_bytes += priv->ule_skb->len; |
| 730 | netif_rx(priv->ule_skb); |
| 731 | } |
| 732 | sndu_done: |
| 733 | /* Prepare for next SNDU. */ |
| 734 | reset_ule(priv); |
| 735 | } |
| 736 | |
| 737 | /* More data in current TS (look at the bytes following the CRC32)? */ |
| 738 | if (ts_remain >= 2 && *((unsigned short *)from_where) != 0xFFFF) { |
| 739 | /* Next ULE SNDU starts right there. */ |
| 740 | new_ts = 0; |
| 741 | priv->ule_skb = NULL; |
| 742 | priv->ule_sndu_type_1 = 0; |
| 743 | priv->ule_sndu_len = 0; |
| 744 | // printk(KERN_WARNING "More data in current TS: [%#x %#x %#x %#x]\n", |
| 745 | // *(from_where + 0), *(from_where + 1), |
| 746 | // *(from_where + 2), *(from_where + 3)); |
| 747 | // printk(KERN_WARNING "ts @ %p, stopped @ %p:\n", ts, from_where + 0); |
| 748 | // hexdump(ts, 188); |
| 749 | } else { |
| 750 | new_ts = 1; |
| 751 | ts += TS_SZ; |
| 752 | priv->ts_count++; |
| 753 | if (priv->ule_skb == NULL) { |
| 754 | priv->need_pusi = 1; |
| 755 | priv->ule_sndu_type_1 = 0; |
| 756 | priv->ule_sndu_len = 0; |
| 757 | } |
| 758 | } |
| 759 | } /* for all available TS cells */ |
| 760 | } |
| 761 | |
| 762 | static int dvb_net_ts_callback(const u8 *buffer1, size_t buffer1_len, |
| 763 | const u8 *buffer2, size_t buffer2_len, |
| 764 | struct dmx_ts_feed *feed) |
| 765 | { |
| 766 | struct net_device *dev = feed->priv; |
| 767 | |
| 768 | if (buffer2) |
| 769 | printk(KERN_WARNING "buffer2 not NULL: %p.\n", buffer2); |
| 770 | if (buffer1_len > 32768) |
| 771 | printk(KERN_WARNING "length > 32k: %zu.\n", buffer1_len); |
| 772 | /* printk("TS callback: %u bytes, %u TS cells @ %p.\n", |
| 773 | buffer1_len, buffer1_len / TS_SZ, buffer1); */ |
| 774 | dvb_net_ule(dev, buffer1, buffer1_len); |
| 775 | return 0; |
| 776 | } |
| 777 | |
| 778 | |
| 779 | static void dvb_net_sec(struct net_device *dev, |
| 780 | const u8 *pkt, int pkt_len) |
| 781 | { |
| 782 | u8 *eth; |
| 783 | struct sk_buff *skb; |
| 784 | struct net_device_stats *stats = &dev->stats; |
| 785 | int snap = 0; |
| 786 | |
| 787 | /* note: pkt_len includes a 32bit checksum */ |
| 788 | if (pkt_len < 16) { |
| 789 | printk("%s: IP/MPE packet length = %d too small.\n", |
| 790 | dev->name, pkt_len); |
| 791 | stats->rx_errors++; |
| 792 | stats->rx_length_errors++; |
| 793 | return; |
| 794 | } |
| 795 | /* it seems some ISPs manage to screw up here, so we have to |
| 796 | * relax the error checks... */ |
| 797 | #if 0 |
| 798 | if ((pkt[5] & 0xfd) != 0xc1) { |
| 799 | /* drop scrambled or broken packets */ |
| 800 | #else |
| 801 | if ((pkt[5] & 0x3c) != 0x00) { |
| 802 | /* drop scrambled */ |
| 803 | #endif |
| 804 | stats->rx_errors++; |
| 805 | stats->rx_crc_errors++; |
| 806 | return; |
| 807 | } |
| 808 | if (pkt[5] & 0x02) { |
| 809 | /* handle LLC/SNAP, see rfc-1042 */ |
| 810 | if (pkt_len < 24 || memcmp(&pkt[12], "\xaa\xaa\x03\0\0\0", 6)) { |
| 811 | stats->rx_dropped++; |
| 812 | return; |
| 813 | } |
| 814 | snap = 8; |
| 815 | } |
| 816 | if (pkt[7]) { |
| 817 | /* FIXME: assemble datagram from multiple sections */ |
| 818 | stats->rx_errors++; |
| 819 | stats->rx_frame_errors++; |
| 820 | return; |
| 821 | } |
| 822 | |
| 823 | /* we have 14 byte ethernet header (ip header follows); |
| 824 | * 12 byte MPE header; 4 byte checksum; + 2 byte alignment, 8 byte LLC/SNAP |
| 825 | */ |
| 826 | if (!(skb = dev_alloc_skb(pkt_len - 4 - 12 + 14 + 2 - snap))) { |
| 827 | //printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n", dev->name); |
| 828 | stats->rx_dropped++; |
| 829 | return; |
| 830 | } |
| 831 | skb_reserve(skb, 2); /* longword align L3 header */ |
| 832 | skb->dev = dev; |
| 833 | |
| 834 | /* copy L3 payload */ |
| 835 | eth = (u8 *) skb_put(skb, pkt_len - 12 - 4 + 14 - snap); |
| 836 | memcpy(eth + 14, pkt + 12 + snap, pkt_len - 12 - 4 - snap); |
| 837 | |
| 838 | /* create ethernet header: */ |
| 839 | eth[0]=pkt[0x0b]; |
| 840 | eth[1]=pkt[0x0a]; |
| 841 | eth[2]=pkt[0x09]; |
| 842 | eth[3]=pkt[0x08]; |
| 843 | eth[4]=pkt[0x04]; |
| 844 | eth[5]=pkt[0x03]; |
| 845 | |
| 846 | eth[6]=eth[7]=eth[8]=eth[9]=eth[10]=eth[11]=0; |
| 847 | |
| 848 | if (snap) { |
| 849 | eth[12] = pkt[18]; |
| 850 | eth[13] = pkt[19]; |
| 851 | } else { |
| 852 | /* protocol numbers are from rfc-1700 or |
| 853 | * http://www.iana.org/assignments/ethernet-numbers |
| 854 | */ |
| 855 | if (pkt[12] >> 4 == 6) { /* version field from IP header */ |
| 856 | eth[12] = 0x86; /* IPv6 */ |
| 857 | eth[13] = 0xdd; |
| 858 | } else { |
| 859 | eth[12] = 0x08; /* IPv4 */ |
| 860 | eth[13] = 0x00; |
| 861 | } |
| 862 | } |
| 863 | |
| 864 | skb->protocol = dvb_net_eth_type_trans(skb, dev); |
| 865 | |
| 866 | stats->rx_packets++; |
| 867 | stats->rx_bytes+=skb->len; |
| 868 | netif_rx(skb); |
| 869 | } |
| 870 | |
| 871 | static int dvb_net_sec_callback(const u8 *buffer1, size_t buffer1_len, |
| 872 | const u8 *buffer2, size_t buffer2_len, |
| 873 | struct dmx_section_filter *filter) |
| 874 | { |
| 875 | struct net_device *dev = filter->priv; |
| 876 | |
| 877 | /** |
| 878 | * we rely on the DVB API definition where exactly one complete |
| 879 | * section is delivered in buffer1 |
| 880 | */ |
| 881 | dvb_net_sec (dev, buffer1, buffer1_len); |
| 882 | return 0; |
| 883 | } |
| 884 | |
| 885 | static int dvb_net_tx(struct sk_buff *skb, struct net_device *dev) |
| 886 | { |
| 887 | dev_kfree_skb(skb); |
| 888 | return NETDEV_TX_OK; |
| 889 | } |
| 890 | |
| 891 | static u8 mask_normal[6]={0xff, 0xff, 0xff, 0xff, 0xff, 0xff}; |
| 892 | static u8 mask_allmulti[6]={0xff, 0xff, 0xff, 0x00, 0x00, 0x00}; |
| 893 | static u8 mac_allmulti[6]={0x01, 0x00, 0x5e, 0x00, 0x00, 0x00}; |
| 894 | static u8 mask_promisc[6]={0x00, 0x00, 0x00, 0x00, 0x00, 0x00}; |
| 895 | |
| 896 | static int dvb_net_filter_sec_set(struct net_device *dev, |
| 897 | struct dmx_section_filter **secfilter, |
| 898 | u8 *mac, u8 *mac_mask) |
| 899 | { |
| 900 | struct dvb_net_priv *priv = netdev_priv(dev); |
| 901 | int ret; |
| 902 | |
| 903 | *secfilter=NULL; |
| 904 | ret = priv->secfeed->allocate_filter(priv->secfeed, secfilter); |
| 905 | if (ret<0) { |
| 906 | printk("%s: could not get filter\n", dev->name); |
| 907 | return ret; |
| 908 | } |
| 909 | |
| 910 | (*secfilter)->priv=(void *) dev; |
| 911 | |
| 912 | memset((*secfilter)->filter_value, 0x00, DMX_MAX_FILTER_SIZE); |
| 913 | memset((*secfilter)->filter_mask, 0x00, DMX_MAX_FILTER_SIZE); |
| 914 | memset((*secfilter)->filter_mode, 0xff, DMX_MAX_FILTER_SIZE); |
| 915 | |
| 916 | (*secfilter)->filter_value[0]=0x3e; |
| 917 | (*secfilter)->filter_value[3]=mac[5]; |
| 918 | (*secfilter)->filter_value[4]=mac[4]; |
| 919 | (*secfilter)->filter_value[8]=mac[3]; |
| 920 | (*secfilter)->filter_value[9]=mac[2]; |
| 921 | (*secfilter)->filter_value[10]=mac[1]; |
| 922 | (*secfilter)->filter_value[11]=mac[0]; |
| 923 | |
| 924 | (*secfilter)->filter_mask[0] = 0xff; |
| 925 | (*secfilter)->filter_mask[3] = mac_mask[5]; |
| 926 | (*secfilter)->filter_mask[4] = mac_mask[4]; |
| 927 | (*secfilter)->filter_mask[8] = mac_mask[3]; |
| 928 | (*secfilter)->filter_mask[9] = mac_mask[2]; |
| 929 | (*secfilter)->filter_mask[10] = mac_mask[1]; |
| 930 | (*secfilter)->filter_mask[11]=mac_mask[0]; |
| 931 | |
| 932 | netdev_dbg(dev, "filter mac=%pM mask=%pM\n", mac, mac_mask); |
| 933 | |
| 934 | return 0; |
| 935 | } |
| 936 | |
| 937 | static int dvb_net_feed_start(struct net_device *dev) |
| 938 | { |
| 939 | int ret = 0, i; |
| 940 | struct dvb_net_priv *priv = netdev_priv(dev); |
| 941 | struct dmx_demux *demux = priv->demux; |
| 942 | unsigned char *mac = (unsigned char *) dev->dev_addr; |
| 943 | |
| 944 | netdev_dbg(dev, "rx_mode %i\n", priv->rx_mode); |
| 945 | mutex_lock(&priv->mutex); |
| 946 | if (priv->tsfeed || priv->secfeed || priv->secfilter || priv->multi_secfilter[0]) |
| 947 | printk("%s: BUG %d\n", __func__, __LINE__); |
| 948 | |
| 949 | priv->secfeed=NULL; |
| 950 | priv->secfilter=NULL; |
| 951 | priv->tsfeed = NULL; |
| 952 | |
| 953 | if (priv->feedtype == DVB_NET_FEEDTYPE_MPE) { |
| 954 | netdev_dbg(dev, "alloc secfeed\n"); |
| 955 | ret=demux->allocate_section_feed(demux, &priv->secfeed, |
| 956 | dvb_net_sec_callback); |
| 957 | if (ret<0) { |
| 958 | printk("%s: could not allocate section feed\n", dev->name); |
| 959 | goto error; |
| 960 | } |
| 961 | |
| 962 | ret = priv->secfeed->set(priv->secfeed, priv->pid, 32768, 1); |
| 963 | |
| 964 | if (ret<0) { |
| 965 | printk("%s: could not set section feed\n", dev->name); |
| 966 | priv->demux->release_section_feed(priv->demux, priv->secfeed); |
| 967 | priv->secfeed=NULL; |
| 968 | goto error; |
| 969 | } |
| 970 | |
| 971 | if (priv->rx_mode != RX_MODE_PROMISC) { |
| 972 | netdev_dbg(dev, "set secfilter\n"); |
| 973 | dvb_net_filter_sec_set(dev, &priv->secfilter, mac, mask_normal); |
| 974 | } |
| 975 | |
| 976 | switch (priv->rx_mode) { |
| 977 | case RX_MODE_MULTI: |
| 978 | for (i = 0; i < priv->multi_num; i++) { |
| 979 | netdev_dbg(dev, "set multi_secfilter[%d]\n", i); |
| 980 | dvb_net_filter_sec_set(dev, &priv->multi_secfilter[i], |
| 981 | priv->multi_macs[i], mask_normal); |
| 982 | } |
| 983 | break; |
| 984 | case RX_MODE_ALL_MULTI: |
| 985 | priv->multi_num=1; |
| 986 | netdev_dbg(dev, "set multi_secfilter[0]\n"); |
| 987 | dvb_net_filter_sec_set(dev, &priv->multi_secfilter[0], |
| 988 | mac_allmulti, mask_allmulti); |
| 989 | break; |
| 990 | case RX_MODE_PROMISC: |
| 991 | priv->multi_num=0; |
| 992 | netdev_dbg(dev, "set secfilter\n"); |
| 993 | dvb_net_filter_sec_set(dev, &priv->secfilter, mac, mask_promisc); |
| 994 | break; |
| 995 | } |
| 996 | |
| 997 | netdev_dbg(dev, "start filtering\n"); |
| 998 | priv->secfeed->start_filtering(priv->secfeed); |
| 999 | } else if (priv->feedtype == DVB_NET_FEEDTYPE_ULE) { |
| 1000 | struct timespec timeout = { 0, 10000000 }; // 10 msec |
| 1001 | |
| 1002 | /* we have payloads encapsulated in TS */ |
| 1003 | netdev_dbg(dev, "alloc tsfeed\n"); |
| 1004 | ret = demux->allocate_ts_feed(demux, &priv->tsfeed, dvb_net_ts_callback); |
| 1005 | if (ret < 0) { |
| 1006 | printk("%s: could not allocate ts feed\n", dev->name); |
| 1007 | goto error; |
| 1008 | } |
| 1009 | |
| 1010 | /* Set netdevice pointer for ts decaps callback. */ |
| 1011 | priv->tsfeed->priv = (void *)dev; |
| 1012 | ret = priv->tsfeed->set(priv->tsfeed, |
| 1013 | priv->pid, /* pid */ |
| 1014 | TS_PACKET, /* type */ |
| 1015 | DMX_PES_OTHER, /* pes type */ |
| 1016 | 32768, /* circular buffer size */ |
| 1017 | timeout /* timeout */ |
| 1018 | ); |
| 1019 | |
| 1020 | if (ret < 0) { |
| 1021 | printk("%s: could not set ts feed\n", dev->name); |
| 1022 | priv->demux->release_ts_feed(priv->demux, priv->tsfeed); |
| 1023 | priv->tsfeed = NULL; |
| 1024 | goto error; |
| 1025 | } |
| 1026 | |
| 1027 | netdev_dbg(dev, "start filtering\n"); |
| 1028 | priv->tsfeed->start_filtering(priv->tsfeed); |
| 1029 | } else |
| 1030 | ret = -EINVAL; |
| 1031 | |
| 1032 | error: |
| 1033 | mutex_unlock(&priv->mutex); |
| 1034 | return ret; |
| 1035 | } |
| 1036 | |
| 1037 | static int dvb_net_feed_stop(struct net_device *dev) |
| 1038 | { |
| 1039 | struct dvb_net_priv *priv = netdev_priv(dev); |
| 1040 | int i, ret = 0; |
| 1041 | |
| 1042 | mutex_lock(&priv->mutex); |
| 1043 | if (priv->feedtype == DVB_NET_FEEDTYPE_MPE) { |
| 1044 | if (priv->secfeed) { |
| 1045 | if (priv->secfeed->is_filtering) { |
| 1046 | netdev_dbg(dev, "stop secfeed\n"); |
| 1047 | priv->secfeed->stop_filtering(priv->secfeed); |
| 1048 | } |
| 1049 | |
| 1050 | if (priv->secfilter) { |
| 1051 | netdev_dbg(dev, "release secfilter\n"); |
| 1052 | priv->secfeed->release_filter(priv->secfeed, |
| 1053 | priv->secfilter); |
| 1054 | priv->secfilter=NULL; |
| 1055 | } |
| 1056 | |
| 1057 | for (i=0; i<priv->multi_num; i++) { |
| 1058 | if (priv->multi_secfilter[i]) { |
| 1059 | netdev_dbg(dev, "release multi_filter[%d]\n", |
| 1060 | i); |
| 1061 | priv->secfeed->release_filter(priv->secfeed, |
| 1062 | priv->multi_secfilter[i]); |
| 1063 | priv->multi_secfilter[i] = NULL; |
| 1064 | } |
| 1065 | } |
| 1066 | |
| 1067 | priv->demux->release_section_feed(priv->demux, priv->secfeed); |
| 1068 | priv->secfeed = NULL; |
| 1069 | } else |
| 1070 | printk("%s: no feed to stop\n", dev->name); |
| 1071 | } else if (priv->feedtype == DVB_NET_FEEDTYPE_ULE) { |
| 1072 | if (priv->tsfeed) { |
| 1073 | if (priv->tsfeed->is_filtering) { |
| 1074 | netdev_dbg(dev, "stop tsfeed\n"); |
| 1075 | priv->tsfeed->stop_filtering(priv->tsfeed); |
| 1076 | } |
| 1077 | priv->demux->release_ts_feed(priv->demux, priv->tsfeed); |
| 1078 | priv->tsfeed = NULL; |
| 1079 | } |
| 1080 | else |
| 1081 | printk("%s: no ts feed to stop\n", dev->name); |
| 1082 | } else |
| 1083 | ret = -EINVAL; |
| 1084 | mutex_unlock(&priv->mutex); |
| 1085 | return ret; |
| 1086 | } |
| 1087 | |
| 1088 | |
| 1089 | static int dvb_set_mc_filter(struct net_device *dev, unsigned char *addr) |
| 1090 | { |
| 1091 | struct dvb_net_priv *priv = netdev_priv(dev); |
| 1092 | |
| 1093 | if (priv->multi_num == DVB_NET_MULTICAST_MAX) |
| 1094 | return -ENOMEM; |
| 1095 | |
| 1096 | memcpy(priv->multi_macs[priv->multi_num], addr, ETH_ALEN); |
| 1097 | |
| 1098 | priv->multi_num++; |
| 1099 | return 0; |
| 1100 | } |
| 1101 | |
| 1102 | |
| 1103 | static void wq_set_multicast_list (struct work_struct *work) |
| 1104 | { |
| 1105 | struct dvb_net_priv *priv = |
| 1106 | container_of(work, struct dvb_net_priv, set_multicast_list_wq); |
| 1107 | struct net_device *dev = priv->net; |
| 1108 | |
| 1109 | dvb_net_feed_stop(dev); |
| 1110 | priv->rx_mode = RX_MODE_UNI; |
| 1111 | netif_addr_lock_bh(dev); |
| 1112 | |
| 1113 | if (dev->flags & IFF_PROMISC) { |
| 1114 | netdev_dbg(dev, "promiscuous mode\n"); |
| 1115 | priv->rx_mode = RX_MODE_PROMISC; |
| 1116 | } else if ((dev->flags & IFF_ALLMULTI)) { |
| 1117 | netdev_dbg(dev, "allmulti mode\n"); |
| 1118 | priv->rx_mode = RX_MODE_ALL_MULTI; |
| 1119 | } else if (!netdev_mc_empty(dev)) { |
| 1120 | struct netdev_hw_addr *ha; |
| 1121 | |
| 1122 | netdev_dbg(dev, "set_mc_list, %d entries\n", |
| 1123 | netdev_mc_count(dev)); |
| 1124 | |
| 1125 | priv->rx_mode = RX_MODE_MULTI; |
| 1126 | priv->multi_num = 0; |
| 1127 | |
| 1128 | netdev_for_each_mc_addr(ha, dev) |
| 1129 | dvb_set_mc_filter(dev, ha->addr); |
| 1130 | } |
| 1131 | |
| 1132 | netif_addr_unlock_bh(dev); |
| 1133 | dvb_net_feed_start(dev); |
| 1134 | } |
| 1135 | |
| 1136 | |
| 1137 | static void dvb_net_set_multicast_list (struct net_device *dev) |
| 1138 | { |
| 1139 | struct dvb_net_priv *priv = netdev_priv(dev); |
| 1140 | schedule_work(&priv->set_multicast_list_wq); |
| 1141 | } |
| 1142 | |
| 1143 | |
| 1144 | static void wq_restart_net_feed (struct work_struct *work) |
| 1145 | { |
| 1146 | struct dvb_net_priv *priv = |
| 1147 | container_of(work, struct dvb_net_priv, restart_net_feed_wq); |
| 1148 | struct net_device *dev = priv->net; |
| 1149 | |
| 1150 | if (netif_running(dev)) { |
| 1151 | dvb_net_feed_stop(dev); |
| 1152 | dvb_net_feed_start(dev); |
| 1153 | } |
| 1154 | } |
| 1155 | |
| 1156 | |
| 1157 | static int dvb_net_set_mac (struct net_device *dev, void *p) |
| 1158 | { |
| 1159 | struct dvb_net_priv *priv = netdev_priv(dev); |
| 1160 | struct sockaddr *addr=p; |
| 1161 | |
| 1162 | memcpy(dev->dev_addr, addr->sa_data, dev->addr_len); |
| 1163 | |
| 1164 | if (netif_running(dev)) |
| 1165 | schedule_work(&priv->restart_net_feed_wq); |
| 1166 | |
| 1167 | return 0; |
| 1168 | } |
| 1169 | |
| 1170 | |
| 1171 | static int dvb_net_open(struct net_device *dev) |
| 1172 | { |
| 1173 | struct dvb_net_priv *priv = netdev_priv(dev); |
| 1174 | |
| 1175 | priv->in_use++; |
| 1176 | dvb_net_feed_start(dev); |
| 1177 | return 0; |
| 1178 | } |
| 1179 | |
| 1180 | |
| 1181 | static int dvb_net_stop(struct net_device *dev) |
| 1182 | { |
| 1183 | struct dvb_net_priv *priv = netdev_priv(dev); |
| 1184 | |
| 1185 | priv->in_use--; |
| 1186 | return dvb_net_feed_stop(dev); |
| 1187 | } |
| 1188 | |
| 1189 | static const struct header_ops dvb_header_ops = { |
| 1190 | .create = eth_header, |
| 1191 | .parse = eth_header_parse, |
| 1192 | }; |
| 1193 | |
| 1194 | |
| 1195 | static const struct net_device_ops dvb_netdev_ops = { |
| 1196 | .ndo_open = dvb_net_open, |
| 1197 | .ndo_stop = dvb_net_stop, |
| 1198 | .ndo_start_xmit = dvb_net_tx, |
| 1199 | .ndo_set_rx_mode = dvb_net_set_multicast_list, |
| 1200 | .ndo_set_mac_address = dvb_net_set_mac, |
| 1201 | .ndo_change_mtu = eth_change_mtu, |
| 1202 | .ndo_validate_addr = eth_validate_addr, |
| 1203 | }; |
| 1204 | |
| 1205 | static void dvb_net_setup(struct net_device *dev) |
| 1206 | { |
| 1207 | ether_setup(dev); |
| 1208 | |
| 1209 | dev->header_ops = &dvb_header_ops; |
| 1210 | dev->netdev_ops = &dvb_netdev_ops; |
| 1211 | dev->mtu = 4096; |
| 1212 | |
| 1213 | dev->flags |= IFF_NOARP; |
| 1214 | } |
| 1215 | |
| 1216 | static int get_if(struct dvb_net *dvbnet) |
| 1217 | { |
| 1218 | int i; |
| 1219 | |
| 1220 | for (i=0; i<DVB_NET_DEVICES_MAX; i++) |
| 1221 | if (!dvbnet->state[i]) |
| 1222 | break; |
| 1223 | |
| 1224 | if (i == DVB_NET_DEVICES_MAX) |
| 1225 | return -1; |
| 1226 | |
| 1227 | dvbnet->state[i]=1; |
| 1228 | return i; |
| 1229 | } |
| 1230 | |
| 1231 | static int dvb_net_add_if(struct dvb_net *dvbnet, u16 pid, u8 feedtype) |
| 1232 | { |
| 1233 | struct net_device *net; |
| 1234 | struct dvb_net_priv *priv; |
| 1235 | int result; |
| 1236 | int if_num; |
| 1237 | |
| 1238 | if (feedtype != DVB_NET_FEEDTYPE_MPE && feedtype != DVB_NET_FEEDTYPE_ULE) |
| 1239 | return -EINVAL; |
| 1240 | if ((if_num = get_if(dvbnet)) < 0) |
| 1241 | return -EINVAL; |
| 1242 | |
| 1243 | net = alloc_netdev(sizeof(struct dvb_net_priv), "dvb", |
| 1244 | NET_NAME_UNKNOWN, dvb_net_setup); |
| 1245 | if (!net) |
| 1246 | return -ENOMEM; |
| 1247 | |
| 1248 | if (dvbnet->dvbdev->id) |
| 1249 | snprintf(net->name, IFNAMSIZ, "dvb%d%u%d", |
| 1250 | dvbnet->dvbdev->adapter->num, dvbnet->dvbdev->id, if_num); |
| 1251 | else |
| 1252 | /* compatibility fix to keep dvb0_0 format */ |
| 1253 | snprintf(net->name, IFNAMSIZ, "dvb%d_%d", |
| 1254 | dvbnet->dvbdev->adapter->num, if_num); |
| 1255 | |
| 1256 | net->addr_len = 6; |
| 1257 | memcpy(net->dev_addr, dvbnet->dvbdev->adapter->proposed_mac, 6); |
| 1258 | |
| 1259 | dvbnet->device[if_num] = net; |
| 1260 | |
| 1261 | priv = netdev_priv(net); |
| 1262 | priv->net = net; |
| 1263 | priv->demux = dvbnet->demux; |
| 1264 | priv->pid = pid; |
| 1265 | priv->rx_mode = RX_MODE_UNI; |
| 1266 | priv->need_pusi = 1; |
| 1267 | priv->tscc = 0; |
| 1268 | priv->feedtype = feedtype; |
| 1269 | reset_ule(priv); |
| 1270 | |
| 1271 | INIT_WORK(&priv->set_multicast_list_wq, wq_set_multicast_list); |
| 1272 | INIT_WORK(&priv->restart_net_feed_wq, wq_restart_net_feed); |
| 1273 | mutex_init(&priv->mutex); |
| 1274 | |
| 1275 | net->base_addr = pid; |
| 1276 | |
| 1277 | if ((result = register_netdev(net)) < 0) { |
| 1278 | dvbnet->device[if_num] = NULL; |
| 1279 | free_netdev(net); |
| 1280 | return result; |
| 1281 | } |
| 1282 | printk("dvb_net: created network interface %s\n", net->name); |
| 1283 | |
| 1284 | return if_num; |
| 1285 | } |
| 1286 | |
| 1287 | static int dvb_net_remove_if(struct dvb_net *dvbnet, unsigned long num) |
| 1288 | { |
| 1289 | struct net_device *net = dvbnet->device[num]; |
| 1290 | struct dvb_net_priv *priv; |
| 1291 | |
| 1292 | if (!dvbnet->state[num]) |
| 1293 | return -EINVAL; |
| 1294 | priv = netdev_priv(net); |
| 1295 | if (priv->in_use) |
| 1296 | return -EBUSY; |
| 1297 | |
| 1298 | dvb_net_stop(net); |
| 1299 | flush_work(&priv->set_multicast_list_wq); |
| 1300 | flush_work(&priv->restart_net_feed_wq); |
| 1301 | printk("dvb_net: removed network interface %s\n", net->name); |
| 1302 | unregister_netdev(net); |
| 1303 | dvbnet->state[num]=0; |
| 1304 | dvbnet->device[num] = NULL; |
| 1305 | free_netdev(net); |
| 1306 | |
| 1307 | return 0; |
| 1308 | } |
| 1309 | |
| 1310 | static int dvb_net_do_ioctl(struct file *file, |
| 1311 | unsigned int cmd, void *parg) |
| 1312 | { |
| 1313 | struct dvb_device *dvbdev = file->private_data; |
| 1314 | struct dvb_net *dvbnet = dvbdev->priv; |
| 1315 | int ret = 0; |
| 1316 | |
| 1317 | if (((file->f_flags&O_ACCMODE)==O_RDONLY)) |
| 1318 | return -EPERM; |
| 1319 | |
| 1320 | if (mutex_lock_interruptible(&dvbnet->ioctl_mutex)) |
| 1321 | return -ERESTARTSYS; |
| 1322 | |
| 1323 | switch (cmd) { |
| 1324 | case NET_ADD_IF: |
| 1325 | { |
| 1326 | struct dvb_net_if *dvbnetif = parg; |
| 1327 | int result; |
| 1328 | |
| 1329 | if (!capable(CAP_SYS_ADMIN)) { |
| 1330 | ret = -EPERM; |
| 1331 | goto ioctl_error; |
| 1332 | } |
| 1333 | |
| 1334 | if (!try_module_get(dvbdev->adapter->module)) { |
| 1335 | ret = -EPERM; |
| 1336 | goto ioctl_error; |
| 1337 | } |
| 1338 | |
| 1339 | result=dvb_net_add_if(dvbnet, dvbnetif->pid, dvbnetif->feedtype); |
| 1340 | if (result<0) { |
| 1341 | module_put(dvbdev->adapter->module); |
| 1342 | ret = result; |
| 1343 | goto ioctl_error; |
| 1344 | } |
| 1345 | dvbnetif->if_num=result; |
| 1346 | break; |
| 1347 | } |
| 1348 | case NET_GET_IF: |
| 1349 | { |
| 1350 | struct net_device *netdev; |
| 1351 | struct dvb_net_priv *priv_data; |
| 1352 | struct dvb_net_if *dvbnetif = parg; |
| 1353 | |
| 1354 | if (dvbnetif->if_num >= DVB_NET_DEVICES_MAX || |
| 1355 | !dvbnet->state[dvbnetif->if_num]) { |
| 1356 | ret = -EINVAL; |
| 1357 | goto ioctl_error; |
| 1358 | } |
| 1359 | |
| 1360 | netdev = dvbnet->device[dvbnetif->if_num]; |
| 1361 | |
| 1362 | priv_data = netdev_priv(netdev); |
| 1363 | dvbnetif->pid=priv_data->pid; |
| 1364 | dvbnetif->feedtype=priv_data->feedtype; |
| 1365 | break; |
| 1366 | } |
| 1367 | case NET_REMOVE_IF: |
| 1368 | { |
| 1369 | if (!capable(CAP_SYS_ADMIN)) { |
| 1370 | ret = -EPERM; |
| 1371 | goto ioctl_error; |
| 1372 | } |
| 1373 | if ((unsigned long) parg >= DVB_NET_DEVICES_MAX) { |
| 1374 | ret = -EINVAL; |
| 1375 | goto ioctl_error; |
| 1376 | } |
| 1377 | ret = dvb_net_remove_if(dvbnet, (unsigned long) parg); |
| 1378 | if (!ret) |
| 1379 | module_put(dvbdev->adapter->module); |
| 1380 | break; |
| 1381 | } |
| 1382 | |
| 1383 | /* binary compatibility cruft */ |
| 1384 | case __NET_ADD_IF_OLD: |
| 1385 | { |
| 1386 | struct __dvb_net_if_old *dvbnetif = parg; |
| 1387 | int result; |
| 1388 | |
| 1389 | if (!capable(CAP_SYS_ADMIN)) { |
| 1390 | ret = -EPERM; |
| 1391 | goto ioctl_error; |
| 1392 | } |
| 1393 | |
| 1394 | if (!try_module_get(dvbdev->adapter->module)) { |
| 1395 | ret = -EPERM; |
| 1396 | goto ioctl_error; |
| 1397 | } |
| 1398 | |
| 1399 | result=dvb_net_add_if(dvbnet, dvbnetif->pid, DVB_NET_FEEDTYPE_MPE); |
| 1400 | if (result<0) { |
| 1401 | module_put(dvbdev->adapter->module); |
| 1402 | ret = result; |
| 1403 | goto ioctl_error; |
| 1404 | } |
| 1405 | dvbnetif->if_num=result; |
| 1406 | break; |
| 1407 | } |
| 1408 | case __NET_GET_IF_OLD: |
| 1409 | { |
| 1410 | struct net_device *netdev; |
| 1411 | struct dvb_net_priv *priv_data; |
| 1412 | struct __dvb_net_if_old *dvbnetif = parg; |
| 1413 | |
| 1414 | if (dvbnetif->if_num >= DVB_NET_DEVICES_MAX || |
| 1415 | !dvbnet->state[dvbnetif->if_num]) { |
| 1416 | ret = -EINVAL; |
| 1417 | goto ioctl_error; |
| 1418 | } |
| 1419 | |
| 1420 | netdev = dvbnet->device[dvbnetif->if_num]; |
| 1421 | |
| 1422 | priv_data = netdev_priv(netdev); |
| 1423 | dvbnetif->pid=priv_data->pid; |
| 1424 | break; |
| 1425 | } |
| 1426 | default: |
| 1427 | ret = -ENOTTY; |
| 1428 | break; |
| 1429 | } |
| 1430 | |
| 1431 | ioctl_error: |
| 1432 | mutex_unlock(&dvbnet->ioctl_mutex); |
| 1433 | return ret; |
| 1434 | } |
| 1435 | |
| 1436 | static long dvb_net_ioctl(struct file *file, |
| 1437 | unsigned int cmd, unsigned long arg) |
| 1438 | { |
| 1439 | return dvb_usercopy(file, cmd, arg, dvb_net_do_ioctl); |
| 1440 | } |
| 1441 | |
| 1442 | static int dvb_net_close(struct inode *inode, struct file *file) |
| 1443 | { |
| 1444 | struct dvb_device *dvbdev = file->private_data; |
| 1445 | struct dvb_net *dvbnet = dvbdev->priv; |
| 1446 | |
| 1447 | dvb_generic_release(inode, file); |
| 1448 | |
| 1449 | if(dvbdev->users == 1 && dvbnet->exit == 1) |
| 1450 | wake_up(&dvbdev->wait_queue); |
| 1451 | return 0; |
| 1452 | } |
| 1453 | |
| 1454 | |
| 1455 | static const struct file_operations dvb_net_fops = { |
| 1456 | .owner = THIS_MODULE, |
| 1457 | .unlocked_ioctl = dvb_net_ioctl, |
| 1458 | .open = dvb_generic_open, |
| 1459 | .release = dvb_net_close, |
| 1460 | .llseek = noop_llseek, |
| 1461 | }; |
| 1462 | |
| 1463 | static const struct dvb_device dvbdev_net = { |
| 1464 | .priv = NULL, |
| 1465 | .users = 1, |
| 1466 | .writers = 1, |
| 1467 | #if defined(CONFIG_MEDIA_CONTROLLER_DVB) |
| 1468 | .name = "dvb-net", |
| 1469 | #endif |
| 1470 | .fops = &dvb_net_fops, |
| 1471 | }; |
| 1472 | |
| 1473 | void dvb_net_release (struct dvb_net *dvbnet) |
| 1474 | { |
| 1475 | int i; |
| 1476 | |
| 1477 | dvbnet->exit = 1; |
| 1478 | if (dvbnet->dvbdev->users < 1) |
| 1479 | wait_event(dvbnet->dvbdev->wait_queue, |
| 1480 | dvbnet->dvbdev->users==1); |
| 1481 | |
| 1482 | dvb_unregister_device(dvbnet->dvbdev); |
| 1483 | |
| 1484 | for (i=0; i<DVB_NET_DEVICES_MAX; i++) { |
| 1485 | if (!dvbnet->state[i]) |
| 1486 | continue; |
| 1487 | dvb_net_remove_if(dvbnet, i); |
| 1488 | } |
| 1489 | } |
| 1490 | EXPORT_SYMBOL(dvb_net_release); |
| 1491 | |
| 1492 | |
| 1493 | int dvb_net_init (struct dvb_adapter *adap, struct dvb_net *dvbnet, |
| 1494 | struct dmx_demux *dmx) |
| 1495 | { |
| 1496 | int i; |
| 1497 | |
| 1498 | mutex_init(&dvbnet->ioctl_mutex); |
| 1499 | dvbnet->demux = dmx; |
| 1500 | |
| 1501 | for (i=0; i<DVB_NET_DEVICES_MAX; i++) |
| 1502 | dvbnet->state[i] = 0; |
| 1503 | |
| 1504 | return dvb_register_device(adap, &dvbnet->dvbdev, &dvbdev_net, |
| 1505 | dvbnet, DVB_DEVICE_NET); |
| 1506 | } |
| 1507 | EXPORT_SYMBOL(dvb_net_init); |