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 isprint(c) ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || (c >= '0' && c <= '9')) 94 95 static void hexdump( const unsigned char *buf, unsigned short len ) 96 { 97 char str[80], octet[10]; 98 int ofs, i, l; 99 100 for (ofs = 0; ofs < len; ofs += 16) { 101 sprintf( str, "%03d: ", ofs ); 102 103 for (i = 0; i < 16; i++) { 104 if ((i + ofs) < len) 105 sprintf( octet, "%02x ", buf[ofs + i] ); 106 else 107 strcpy( octet, " " ); 108 109 strcat( str, octet ); 110 } 111 strcat( str, " " ); 112 l = strlen( str ); 113 114 for (i = 0; (i < 16) && ((i + ofs) < len); i++) 115 str[l++] = isprint( buf[ofs + i] ) ? buf[ofs + i] : '.'; 116 117 str[l] = '\0'; 118 printk( KERN_WARNING "%s\n", str ); 119 } 120 } 121 122 #endif 123 124 struct dvb_net_priv { 125 int in_use; 126 u16 pid; 127 struct net_device *net; 128 struct dvb_net *host; 129 struct dmx_demux *demux; 130 struct dmx_section_feed *secfeed; 131 struct dmx_section_filter *secfilter; 132 struct dmx_ts_feed *tsfeed; 133 int multi_num; 134 struct dmx_section_filter *multi_secfilter[DVB_NET_MULTICAST_MAX]; 135 unsigned char multi_macs[DVB_NET_MULTICAST_MAX][6]; 136 int rx_mode; 137 #define RX_MODE_UNI 0 138 #define RX_MODE_MULTI 1 139 #define RX_MODE_ALL_MULTI 2 140 #define RX_MODE_PROMISC 3 141 struct work_struct set_multicast_list_wq; 142 struct work_struct restart_net_feed_wq; 143 unsigned char feedtype; /* Either FEED_TYPE_ or FEED_TYPE_ULE */ 144 int need_pusi; /* Set to 1, if synchronization on PUSI required. */ 145 unsigned char tscc; /* TS continuity counter after sync on PUSI. */ 146 struct sk_buff *ule_skb; /* ULE SNDU decodes into this buffer. */ 147 unsigned char *ule_next_hdr; /* Pointer into skb to next ULE extension header. */ 148 unsigned short ule_sndu_len; /* ULE SNDU length in bytes, w/o D-Bit. */ 149 unsigned short ule_sndu_type; /* ULE SNDU type field, complete. */ 150 unsigned char ule_sndu_type_1; /* ULE SNDU type field, if split across 2 TS cells. */ 151 unsigned char ule_dbit; /* Whether the DestMAC address present 152 * or not (bit is set). */ 153 unsigned char ule_bridged; /* Whether the ULE_BRIDGED extension header was found. */ 154 int ule_sndu_remain; /* Nr. of bytes still required for current ULE SNDU. */ 155 unsigned long ts_count; /* Current ts cell counter. */ 156 struct mutex mutex; 157 }; 158 159 160 /** 161 * Determine the packet's protocol ID. The rule here is that we 162 * assume 802.3 if the type field is short enough to be a length. 163 * This is normal practice and works for any 'now in use' protocol. 164 * 165 * stolen from eth.c out of the linux kernel, hacked for dvb-device 166 * by Michael Holzt <kju@debian.org> 167 */ 168 static __be16 dvb_net_eth_type_trans(struct sk_buff *skb, 169 struct net_device *dev) 170 { 171 struct ethhdr *eth; 172 unsigned char *rawp; 173 174 skb_reset_mac_header(skb); 175 skb_pull(skb,dev->hard_header_len); 176 eth = eth_hdr(skb); 177 178 if (*eth->h_dest & 1) { 179 if(ether_addr_equal(eth->h_dest,dev->broadcast)) 180 skb->pkt_type=PACKET_BROADCAST; 181 else 182 skb->pkt_type=PACKET_MULTICAST; 183 } 184 185 if (ntohs(eth->h_proto) >= ETH_P_802_3_MIN) 186 return eth->h_proto; 187 188 rawp = skb->data; 189 190 /** 191 * This is a magic hack to spot IPX packets. Older Novell breaks 192 * the protocol design and runs IPX over 802.3 without an 802.2 LLC 193 * layer. We look for FFFF which isn't a used 802.2 SSAP/DSAP. This 194 * won't work for fault tolerant netware but does for the rest. 195 */ 196 if (*(unsigned short *)rawp == 0xFFFF) 197 return htons(ETH_P_802_3); 198 199 /** 200 * Real 802.2 LLC 201 */ 202 return htons(ETH_P_802_2); 203 } 204 205 #define TS_SZ 188 206 #define TS_SYNC 0x47 207 #define TS_TEI 0x80 208 #define TS_SC 0xC0 209 #define TS_PUSI 0x40 210 #define TS_AF_A 0x20 211 #define TS_AF_D 0x10 212 213 /* ULE Extension Header handlers. */ 214 215 #define ULE_TEST 0 216 #define ULE_BRIDGED 1 217 218 #define ULE_OPTEXTHDR_PADDING 0 219 220 static int ule_test_sndu( struct dvb_net_priv *p ) 221 { 222 return -1; 223 } 224 225 static int ule_bridged_sndu( struct dvb_net_priv *p ) 226 { 227 struct ethhdr *hdr = (struct ethhdr*) p->ule_next_hdr; 228 if(ntohs(hdr->h_proto) < ETH_P_802_3_MIN) { 229 int framelen = p->ule_sndu_len - ((p->ule_next_hdr+sizeof(struct ethhdr)) - p->ule_skb->data); 230 /* A frame Type < ETH_P_802_3_MIN for a bridged frame, introduces a LLC Length field. */ 231 if(framelen != ntohs(hdr->h_proto)) { 232 return -1; 233 } 234 } 235 /* Note: 236 * From RFC4326: 237 * "A bridged SNDU is a Mandatory Extension Header of Type 1. 238 * It must be the final (or only) extension header specified in the header chain of a SNDU." 239 * The 'ule_bridged' flag will cause the extension header processing loop to terminate. 240 */ 241 p->ule_bridged = 1; 242 return 0; 243 } 244 245 static int ule_exthdr_padding(struct dvb_net_priv *p) 246 { 247 return 0; 248 } 249 250 /** Handle ULE extension headers. 251 * Function is called after a successful CRC32 verification of an ULE SNDU to complete its decoding. 252 * Returns: >= 0: nr. of bytes consumed by next extension header 253 * -1: Mandatory extension header that is not recognized or TEST SNDU; discard. 254 */ 255 static int handle_one_ule_extension( struct dvb_net_priv *p ) 256 { 257 /* Table of mandatory extension header handlers. The header type is the index. */ 258 static int (*ule_mandatory_ext_handlers[255])( struct dvb_net_priv *p ) = 259 { [0] = ule_test_sndu, [1] = ule_bridged_sndu, [2] = NULL, }; 260 261 /* Table of optional extension header handlers. The header type is the index. */ 262 static int (*ule_optional_ext_handlers[255])( struct dvb_net_priv *p ) = 263 { [0] = ule_exthdr_padding, [1] = NULL, }; 264 265 int ext_len = 0; 266 unsigned char hlen = (p->ule_sndu_type & 0x0700) >> 8; 267 unsigned char htype = p->ule_sndu_type & 0x00FF; 268 269 /* Discriminate mandatory and optional extension headers. */ 270 if (hlen == 0) { 271 /* Mandatory extension header */ 272 if (ule_mandatory_ext_handlers[htype]) { 273 ext_len = ule_mandatory_ext_handlers[htype]( p ); 274 if(ext_len >= 0) { 275 p->ule_next_hdr += ext_len; 276 if (!p->ule_bridged) { 277 p->ule_sndu_type = ntohs(*(__be16 *)p->ule_next_hdr); 278 p->ule_next_hdr += 2; 279 } else { 280 p->ule_sndu_type = ntohs(*(__be16 *)(p->ule_next_hdr + ((p->ule_dbit ? 2 : 3) * ETH_ALEN))); 281 /* This assures the extension handling loop will terminate. */ 282 } 283 } 284 // else: extension handler failed or SNDU should be discarded 285 } else 286 ext_len = -1; /* SNDU has to be discarded. */ 287 } else { 288 /* Optional extension header. Calculate the length. */ 289 ext_len = hlen << 1; 290 /* Process the optional extension header according to its type. */ 291 if (ule_optional_ext_handlers[htype]) 292 (void)ule_optional_ext_handlers[htype]( p ); 293 p->ule_next_hdr += ext_len; 294 p->ule_sndu_type = ntohs( *(__be16 *)(p->ule_next_hdr-2) ); 295 /* 296 * note: the length of the next header type is included in the 297 * length of THIS optional extension header 298 */ 299 } 300 301 return ext_len; 302 } 303 304 static int handle_ule_extensions( struct dvb_net_priv *p ) 305 { 306 int total_ext_len = 0, l; 307 308 p->ule_next_hdr = p->ule_skb->data; 309 do { 310 l = handle_one_ule_extension( p ); 311 if (l < 0) 312 return l; /* Stop extension header processing and discard SNDU. */ 313 total_ext_len += l; 314 #ifdef ULE_DEBUG 315 dprintk("handle_ule_extensions: ule_next_hdr=%p, ule_sndu_type=%i, " 316 "l=%i, total_ext_len=%i\n", p->ule_next_hdr, 317 (int) p->ule_sndu_type, l, total_ext_len); 318 #endif 319 320 } while (p->ule_sndu_type < ETH_P_802_3_MIN); 321 322 return total_ext_len; 323 } 324 325 326 /** Prepare for a new ULE SNDU: reset the decoder state. */ 327 static inline void reset_ule( struct dvb_net_priv *p ) 328 { 329 p->ule_skb = NULL; 330 p->ule_next_hdr = NULL; 331 p->ule_sndu_len = 0; 332 p->ule_sndu_type = 0; 333 p->ule_sndu_type_1 = 0; 334 p->ule_sndu_remain = 0; 335 p->ule_dbit = 0xFF; 336 p->ule_bridged = 0; 337 } 338 339 /** 340 * Decode ULE SNDUs according to draft-ietf-ipdvb-ule-03.txt from a sequence of 341 * TS cells of a single PID. 342 */ 343 static void dvb_net_ule( struct net_device *dev, const u8 *buf, size_t buf_len ) 344 { 345 struct dvb_net_priv *priv = netdev_priv(dev); 346 unsigned long skipped = 0L; 347 const u8 *ts, *ts_end, *from_where = NULL; 348 u8 ts_remain = 0, how_much = 0, new_ts = 1; 349 struct ethhdr *ethh = NULL; 350 bool error = false; 351 352 #ifdef ULE_DEBUG 353 /* The code inside ULE_DEBUG keeps a history of the last 100 TS cells processed. */ 354 static unsigned char ule_hist[100*TS_SZ]; 355 static unsigned char *ule_where = ule_hist, ule_dump; 356 #endif 357 358 /* For all TS cells in current buffer. 359 * Appearently, we are called for every single TS cell. 360 */ 361 for (ts = buf, ts_end = buf + buf_len; ts < ts_end; /* no default incr. */ ) { 362 363 if (new_ts) { 364 /* We are about to process a new TS cell. */ 365 366 #ifdef ULE_DEBUG 367 if (ule_where >= &ule_hist[100*TS_SZ]) ule_where = ule_hist; 368 memcpy( ule_where, ts, TS_SZ ); 369 if (ule_dump) { 370 hexdump( ule_where, TS_SZ ); 371 ule_dump = 0; 372 } 373 ule_where += TS_SZ; 374 #endif 375 376 /* Check TS error conditions: sync_byte, transport_error_indicator, scrambling_control . */ 377 if ((ts[0] != TS_SYNC) || (ts[1] & TS_TEI) || ((ts[3] & TS_SC) != 0)) { 378 printk(KERN_WARNING "%lu: Invalid TS cell: SYNC %#x, TEI %u, SC %#x.\n", 379 priv->ts_count, ts[0], 380 (ts[1] & TS_TEI) >> 7, 381 (ts[3] & TS_SC) >> 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 error = true; 463 dev_kfree_skb(priv->ule_skb); 464 } 465 466 if (error || priv->ule_sndu_remain) { 467 dev->stats.rx_errors++; 468 dev->stats.rx_frame_errors++; 469 error = false; 470 } 471 472 reset_ule(priv); 473 priv->need_pusi = 1; 474 continue; 475 } 476 /* Skip pointer field (we're processing a 477 * packed payload). */ 478 from_where += 1; 479 ts_remain -= 1; 480 } else 481 priv->need_pusi = 0; 482 483 if (priv->ule_sndu_remain > 183) { 484 /* Current SNDU lacks more data than there could be available in the 485 * current TS cell. */ 486 dev->stats.rx_errors++; 487 dev->stats.rx_length_errors++; 488 printk(KERN_WARNING "%lu: Expected %d more SNDU bytes, but " 489 "got PUSI (pf %d, ts_remain %d). Flushing incomplete payload.\n", 490 priv->ts_count, priv->ule_sndu_remain, ts[4], ts_remain); 491 dev_kfree_skb(priv->ule_skb); 492 /* Prepare for next SNDU. */ 493 reset_ule(priv); 494 /* Resync: go to where pointer field points to: start of next ULE SNDU. */ 495 from_where += ts[4]; 496 ts_remain -= ts[4]; 497 } 498 } 499 } 500 501 /* Check if new payload needs to be started. */ 502 if (priv->ule_skb == NULL) { 503 /* Start a new payload with skb. 504 * Find ULE header. It is only guaranteed that the 505 * length field (2 bytes) is contained in the current 506 * TS. 507 * Check ts_remain has to be >= 2 here. */ 508 if (ts_remain < 2) { 509 printk(KERN_WARNING "Invalid payload packing: only %d " 510 "bytes left in TS. Resyncing.\n", ts_remain); 511 priv->ule_sndu_len = 0; 512 priv->need_pusi = 1; 513 ts += TS_SZ; 514 continue; 515 } 516 517 if (! priv->ule_sndu_len) { 518 /* Got at least two bytes, thus extrace the SNDU length. */ 519 priv->ule_sndu_len = from_where[0] << 8 | from_where[1]; 520 if (priv->ule_sndu_len & 0x8000) { 521 /* D-Bit is set: no dest mac present. */ 522 priv->ule_sndu_len &= 0x7FFF; 523 priv->ule_dbit = 1; 524 } else 525 priv->ule_dbit = 0; 526 527 if (priv->ule_sndu_len < 5) { 528 printk(KERN_WARNING "%lu: Invalid ULE SNDU length %u. " 529 "Resyncing.\n", priv->ts_count, priv->ule_sndu_len); 530 dev->stats.rx_errors++; 531 dev->stats.rx_length_errors++; 532 priv->ule_sndu_len = 0; 533 priv->need_pusi = 1; 534 new_ts = 1; 535 ts += TS_SZ; 536 priv->ts_count++; 537 continue; 538 } 539 ts_remain -= 2; /* consume the 2 bytes SNDU length. */ 540 from_where += 2; 541 } 542 543 priv->ule_sndu_remain = priv->ule_sndu_len + 2; 544 /* 545 * State of current TS: 546 * ts_remain (remaining bytes in the current TS cell) 547 * 0 ule_type is not available now, we need the next TS cell 548 * 1 the first byte of the ule_type is present 549 * >=2 full ULE header present, maybe some payload data as well. 550 */ 551 switch (ts_remain) { 552 case 1: 553 priv->ule_sndu_remain--; 554 priv->ule_sndu_type = from_where[0] << 8; 555 priv->ule_sndu_type_1 = 1; /* first byte of ule_type is set. */ 556 ts_remain -= 1; from_where += 1; 557 /* Continue w/ next TS. */ 558 case 0: 559 new_ts = 1; 560 ts += TS_SZ; 561 priv->ts_count++; 562 continue; 563 564 default: /* complete ULE header is present in current TS. */ 565 /* Extract ULE type field. */ 566 if (priv->ule_sndu_type_1) { 567 priv->ule_sndu_type_1 = 0; 568 priv->ule_sndu_type |= from_where[0]; 569 from_where += 1; /* points to payload start. */ 570 ts_remain -= 1; 571 } else { 572 /* Complete type is present in new TS. */ 573 priv->ule_sndu_type = from_where[0] << 8 | from_where[1]; 574 from_where += 2; /* points to payload start. */ 575 ts_remain -= 2; 576 } 577 break; 578 } 579 580 /* Allocate the skb (decoder target buffer) with the correct size, as follows: 581 * prepare for the largest case: bridged SNDU with MAC address (dbit = 0). */ 582 priv->ule_skb = dev_alloc_skb( priv->ule_sndu_len + ETH_HLEN + ETH_ALEN ); 583 if (priv->ule_skb == NULL) { 584 printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n", 585 dev->name); 586 dev->stats.rx_dropped++; 587 return; 588 } 589 590 /* This includes the CRC32 _and_ dest mac, if !dbit. */ 591 priv->ule_sndu_remain = priv->ule_sndu_len; 592 priv->ule_skb->dev = dev; 593 /* Leave space for Ethernet or bridged SNDU header (eth hdr plus one MAC addr). */ 594 skb_reserve( priv->ule_skb, ETH_HLEN + ETH_ALEN ); 595 } 596 597 /* Copy data into our current skb. */ 598 how_much = min(priv->ule_sndu_remain, (int)ts_remain); 599 memcpy(skb_put(priv->ule_skb, how_much), from_where, how_much); 600 priv->ule_sndu_remain -= how_much; 601 ts_remain -= how_much; 602 from_where += how_much; 603 604 /* Check for complete payload. */ 605 if (priv->ule_sndu_remain <= 0) { 606 /* Check CRC32, we've got it in our skb already. */ 607 __be16 ulen = htons(priv->ule_sndu_len); 608 __be16 utype = htons(priv->ule_sndu_type); 609 const u8 *tail; 610 struct kvec iov[3] = { 611 { &ulen, sizeof ulen }, 612 { &utype, sizeof utype }, 613 { priv->ule_skb->data, priv->ule_skb->len - 4 } 614 }; 615 u32 ule_crc = ~0L, expected_crc; 616 if (priv->ule_dbit) { 617 /* Set D-bit for CRC32 verification, 618 * if it was set originally. */ 619 ulen |= htons(0x8000); 620 } 621 622 ule_crc = iov_crc32(ule_crc, iov, 3); 623 tail = skb_tail_pointer(priv->ule_skb); 624 expected_crc = *(tail - 4) << 24 | 625 *(tail - 3) << 16 | 626 *(tail - 2) << 8 | 627 *(tail - 1); 628 if (ule_crc != expected_crc) { 629 printk(KERN_WARNING "%lu: CRC32 check FAILED: %08x / %08x, SNDU len %d type %#x, ts_remain %d, next 2: %x.\n", 630 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); 631 632 #ifdef ULE_DEBUG 633 hexdump( iov[0].iov_base, iov[0].iov_len ); 634 hexdump( iov[1].iov_base, iov[1].iov_len ); 635 hexdump( iov[2].iov_base, iov[2].iov_len ); 636 637 if (ule_where == ule_hist) { 638 hexdump( &ule_hist[98*TS_SZ], TS_SZ ); 639 hexdump( &ule_hist[99*TS_SZ], TS_SZ ); 640 } else if (ule_where == &ule_hist[TS_SZ]) { 641 hexdump( &ule_hist[99*TS_SZ], TS_SZ ); 642 hexdump( ule_hist, TS_SZ ); 643 } else { 644 hexdump( ule_where - TS_SZ - TS_SZ, TS_SZ ); 645 hexdump( ule_where - TS_SZ, TS_SZ ); 646 } 647 ule_dump = 1; 648 #endif 649 650 dev->stats.rx_errors++; 651 dev->stats.rx_crc_errors++; 652 dev_kfree_skb(priv->ule_skb); 653 } else { 654 /* CRC32 verified OK. */ 655 u8 dest_addr[ETH_ALEN]; 656 static const u8 bc_addr[ETH_ALEN] = 657 { [ 0 ... ETH_ALEN-1] = 0xff }; 658 659 /* CRC32 was OK. Remove it from skb. */ 660 priv->ule_skb->tail -= 4; 661 priv->ule_skb->len -= 4; 662 663 if (!priv->ule_dbit) { 664 /* 665 * The destination MAC address is the 666 * next data in the skb. It comes 667 * before any extension headers. 668 * 669 * Check if the payload of this SNDU 670 * should be passed up the stack. 671 */ 672 register int drop = 0; 673 if (priv->rx_mode != RX_MODE_PROMISC) { 674 if (priv->ule_skb->data[0] & 0x01) { 675 /* multicast or broadcast */ 676 if (!ether_addr_equal(priv->ule_skb->data, bc_addr)) { 677 /* multicast */ 678 if (priv->rx_mode == RX_MODE_MULTI) { 679 int i; 680 for(i = 0; i < priv->multi_num && 681 !ether_addr_equal(priv->ule_skb->data, 682 priv->multi_macs[i]); i++) 683 ; 684 if (i == priv->multi_num) 685 drop = 1; 686 } else if (priv->rx_mode != RX_MODE_ALL_MULTI) 687 drop = 1; /* no broadcast; */ 688 /* else: all multicast mode: accept all multicast packets */ 689 } 690 /* else: broadcast */ 691 } 692 else if (!ether_addr_equal(priv->ule_skb->data, dev->dev_addr)) 693 drop = 1; 694 /* else: destination address matches the MAC address of our receiver device */ 695 } 696 /* else: promiscuous mode; pass everything up the stack */ 697 698 if (drop) { 699 #ifdef ULE_DEBUG 700 dprintk("Dropping SNDU: MAC destination address does not match: dest addr: %pM, dev addr: %pM\n", 701 priv->ule_skb->data, dev->dev_addr); 702 #endif 703 dev_kfree_skb(priv->ule_skb); 704 goto sndu_done; 705 } 706 else 707 { 708 skb_copy_from_linear_data(priv->ule_skb, 709 dest_addr, 710 ETH_ALEN); 711 skb_pull(priv->ule_skb, ETH_ALEN); 712 } 713 } 714 715 /* Handle ULE Extension Headers. */ 716 if (priv->ule_sndu_type < ETH_P_802_3_MIN) { 717 /* There is an extension header. Handle it accordingly. */ 718 int l = handle_ule_extensions(priv); 719 if (l < 0) { 720 /* Mandatory extension header unknown or TEST SNDU. Drop it. */ 721 // printk( KERN_WARNING "Dropping SNDU, extension headers.\n" ); 722 dev_kfree_skb(priv->ule_skb); 723 goto sndu_done; 724 } 725 skb_pull(priv->ule_skb, l); 726 } 727 728 /* 729 * Construct/assure correct ethernet header. 730 * Note: in bridged mode (priv->ule_bridged != 731 * 0) we already have the (original) ethernet 732 * header at the start of the payload (after 733 * optional dest. address and any extension 734 * headers). 735 */ 736 737 if (!priv->ule_bridged) { 738 skb_push(priv->ule_skb, ETH_HLEN); 739 ethh = (struct ethhdr *)priv->ule_skb->data; 740 if (!priv->ule_dbit) { 741 /* dest_addr buffer is only valid if priv->ule_dbit == 0 */ 742 memcpy(ethh->h_dest, dest_addr, ETH_ALEN); 743 memset(ethh->h_source, 0, ETH_ALEN); 744 } 745 else /* zeroize source and dest */ 746 memset( ethh, 0, ETH_ALEN*2 ); 747 748 ethh->h_proto = htons(priv->ule_sndu_type); 749 } 750 /* else: skb is in correct state; nothing to do. */ 751 priv->ule_bridged = 0; 752 753 /* Stuff into kernel's protocol stack. */ 754 priv->ule_skb->protocol = dvb_net_eth_type_trans(priv->ule_skb, dev); 755 /* If D-bit is set (i.e. destination MAC address not present), 756 * receive the packet anyhow. */ 757 /* if (priv->ule_dbit && skb->pkt_type == PACKET_OTHERHOST) 758 priv->ule_skb->pkt_type = PACKET_HOST; */ 759 dev->stats.rx_packets++; 760 dev->stats.rx_bytes += priv->ule_skb->len; 761 netif_rx(priv->ule_skb); 762 } 763 sndu_done: 764 /* Prepare for next SNDU. */ 765 reset_ule(priv); 766 } 767 768 /* More data in current TS (look at the bytes following the CRC32)? */ 769 if (ts_remain >= 2 && *((unsigned short *)from_where) != 0xFFFF) { 770 /* Next ULE SNDU starts right there. */ 771 new_ts = 0; 772 priv->ule_skb = NULL; 773 priv->ule_sndu_type_1 = 0; 774 priv->ule_sndu_len = 0; 775 // printk(KERN_WARNING "More data in current TS: [%#x %#x %#x %#x]\n", 776 // *(from_where + 0), *(from_where + 1), 777 // *(from_where + 2), *(from_where + 3)); 778 // printk(KERN_WARNING "ts @ %p, stopped @ %p:\n", ts, from_where + 0); 779 // hexdump(ts, 188); 780 } else { 781 new_ts = 1; 782 ts += TS_SZ; 783 priv->ts_count++; 784 if (priv->ule_skb == NULL) { 785 priv->need_pusi = 1; 786 priv->ule_sndu_type_1 = 0; 787 priv->ule_sndu_len = 0; 788 } 789 } 790 } /* for all available TS cells */ 791 } 792 793 static int dvb_net_ts_callback(const u8 *buffer1, size_t buffer1_len, 794 const u8 *buffer2, size_t buffer2_len, 795 struct dmx_ts_feed *feed, enum dmx_success success) 796 { 797 struct net_device *dev = feed->priv; 798 799 if (buffer2) 800 printk(KERN_WARNING "buffer2 not NULL: %p.\n", buffer2); 801 if (buffer1_len > 32768) 802 printk(KERN_WARNING "length > 32k: %zu.\n", buffer1_len); 803 /* printk("TS callback: %u bytes, %u TS cells @ %p.\n", 804 buffer1_len, buffer1_len / TS_SZ, buffer1); */ 805 dvb_net_ule(dev, buffer1, buffer1_len); 806 return 0; 807 } 808 809 810 static void dvb_net_sec(struct net_device *dev, 811 const u8 *pkt, int pkt_len) 812 { 813 u8 *eth; 814 struct sk_buff *skb; 815 struct net_device_stats *stats = &dev->stats; 816 int snap = 0; 817 818 /* note: pkt_len includes a 32bit checksum */ 819 if (pkt_len < 16) { 820 printk("%s: IP/MPE packet length = %d too small.\n", 821 dev->name, pkt_len); 822 stats->rx_errors++; 823 stats->rx_length_errors++; 824 return; 825 } 826 /* it seems some ISPs manage to screw up here, so we have to 827 * relax the error checks... */ 828 #if 0 829 if ((pkt[5] & 0xfd) != 0xc1) { 830 /* drop scrambled or broken packets */ 831 #else 832 if ((pkt[5] & 0x3c) != 0x00) { 833 /* drop scrambled */ 834 #endif 835 stats->rx_errors++; 836 stats->rx_crc_errors++; 837 return; 838 } 839 if (pkt[5] & 0x02) { 840 /* handle LLC/SNAP, see rfc-1042 */ 841 if (pkt_len < 24 || memcmp(&pkt[12], "\xaa\xaa\x03\0\0\0", 6)) { 842 stats->rx_dropped++; 843 return; 844 } 845 snap = 8; 846 } 847 if (pkt[7]) { 848 /* FIXME: assemble datagram from multiple sections */ 849 stats->rx_errors++; 850 stats->rx_frame_errors++; 851 return; 852 } 853 854 /* we have 14 byte ethernet header (ip header follows); 855 * 12 byte MPE header; 4 byte checksum; + 2 byte alignment, 8 byte LLC/SNAP 856 */ 857 if (!(skb = dev_alloc_skb(pkt_len - 4 - 12 + 14 + 2 - snap))) { 858 //printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n", dev->name); 859 stats->rx_dropped++; 860 return; 861 } 862 skb_reserve(skb, 2); /* longword align L3 header */ 863 skb->dev = dev; 864 865 /* copy L3 payload */ 866 eth = (u8 *) skb_put(skb, pkt_len - 12 - 4 + 14 - snap); 867 memcpy(eth + 14, pkt + 12 + snap, pkt_len - 12 - 4 - snap); 868 869 /* create ethernet header: */ 870 eth[0]=pkt[0x0b]; 871 eth[1]=pkt[0x0a]; 872 eth[2]=pkt[0x09]; 873 eth[3]=pkt[0x08]; 874 eth[4]=pkt[0x04]; 875 eth[5]=pkt[0x03]; 876 877 eth[6]=eth[7]=eth[8]=eth[9]=eth[10]=eth[11]=0; 878 879 if (snap) { 880 eth[12] = pkt[18]; 881 eth[13] = pkt[19]; 882 } else { 883 /* protocol numbers are from rfc-1700 or 884 * http://www.iana.org/assignments/ethernet-numbers 885 */ 886 if (pkt[12] >> 4 == 6) { /* version field from IP header */ 887 eth[12] = 0x86; /* IPv6 */ 888 eth[13] = 0xdd; 889 } else { 890 eth[12] = 0x08; /* IPv4 */ 891 eth[13] = 0x00; 892 } 893 } 894 895 skb->protocol = dvb_net_eth_type_trans(skb, dev); 896 897 stats->rx_packets++; 898 stats->rx_bytes+=skb->len; 899 netif_rx(skb); 900 } 901 902 static int dvb_net_sec_callback(const u8 *buffer1, size_t buffer1_len, 903 const u8 *buffer2, size_t buffer2_len, 904 struct dmx_section_filter *filter, 905 enum dmx_success success) 906 { 907 struct net_device *dev = filter->priv; 908 909 /** 910 * we rely on the DVB API definition where exactly one complete 911 * section is delivered in buffer1 912 */ 913 dvb_net_sec (dev, buffer1, buffer1_len); 914 return 0; 915 } 916 917 static int dvb_net_tx(struct sk_buff *skb, struct net_device *dev) 918 { 919 dev_kfree_skb(skb); 920 return NETDEV_TX_OK; 921 } 922 923 static u8 mask_normal[6]={0xff, 0xff, 0xff, 0xff, 0xff, 0xff}; 924 static u8 mask_allmulti[6]={0xff, 0xff, 0xff, 0x00, 0x00, 0x00}; 925 static u8 mac_allmulti[6]={0x01, 0x00, 0x5e, 0x00, 0x00, 0x00}; 926 static u8 mask_promisc[6]={0x00, 0x00, 0x00, 0x00, 0x00, 0x00}; 927 928 static int dvb_net_filter_sec_set(struct net_device *dev, 929 struct dmx_section_filter **secfilter, 930 u8 *mac, u8 *mac_mask) 931 { 932 struct dvb_net_priv *priv = netdev_priv(dev); 933 int ret; 934 935 *secfilter=NULL; 936 ret = priv->secfeed->allocate_filter(priv->secfeed, secfilter); 937 if (ret<0) { 938 printk("%s: could not get filter\n", dev->name); 939 return ret; 940 } 941 942 (*secfilter)->priv=(void *) dev; 943 944 memset((*secfilter)->filter_value, 0x00, DMX_MAX_FILTER_SIZE); 945 memset((*secfilter)->filter_mask, 0x00, DMX_MAX_FILTER_SIZE); 946 memset((*secfilter)->filter_mode, 0xff, DMX_MAX_FILTER_SIZE); 947 948 (*secfilter)->filter_value[0]=0x3e; 949 (*secfilter)->filter_value[3]=mac[5]; 950 (*secfilter)->filter_value[4]=mac[4]; 951 (*secfilter)->filter_value[8]=mac[3]; 952 (*secfilter)->filter_value[9]=mac[2]; 953 (*secfilter)->filter_value[10]=mac[1]; 954 (*secfilter)->filter_value[11]=mac[0]; 955 956 (*secfilter)->filter_mask[0] = 0xff; 957 (*secfilter)->filter_mask[3] = mac_mask[5]; 958 (*secfilter)->filter_mask[4] = mac_mask[4]; 959 (*secfilter)->filter_mask[8] = mac_mask[3]; 960 (*secfilter)->filter_mask[9] = mac_mask[2]; 961 (*secfilter)->filter_mask[10] = mac_mask[1]; 962 (*secfilter)->filter_mask[11]=mac_mask[0]; 963 964 dprintk("%s: filter mac=%pM\n", dev->name, mac); 965 dprintk("%s: filter mask=%pM\n", dev->name, mac_mask); 966 967 return 0; 968 } 969 970 static int dvb_net_feed_start(struct net_device *dev) 971 { 972 int ret = 0, i; 973 struct dvb_net_priv *priv = netdev_priv(dev); 974 struct dmx_demux *demux = priv->demux; 975 unsigned char *mac = (unsigned char *) dev->dev_addr; 976 977 dprintk("%s: rx_mode %i\n", __func__, priv->rx_mode); 978 mutex_lock(&priv->mutex); 979 if (priv->tsfeed || priv->secfeed || priv->secfilter || priv->multi_secfilter[0]) 980 printk("%s: BUG %d\n", __func__, __LINE__); 981 982 priv->secfeed=NULL; 983 priv->secfilter=NULL; 984 priv->tsfeed = NULL; 985 986 if (priv->feedtype == DVB_NET_FEEDTYPE_MPE) { 987 dprintk("%s: alloc secfeed\n", __func__); 988 ret=demux->allocate_section_feed(demux, &priv->secfeed, 989 dvb_net_sec_callback); 990 if (ret<0) { 991 printk("%s: could not allocate section feed\n", dev->name); 992 goto error; 993 } 994 995 ret = priv->secfeed->set(priv->secfeed, priv->pid, 32768, 1); 996 997 if (ret<0) { 998 printk("%s: could not set section feed\n", dev->name); 999 priv->demux->release_section_feed(priv->demux, priv->secfeed); 1000 priv->secfeed=NULL; 1001 goto error; 1002 } 1003 1004 if (priv->rx_mode != RX_MODE_PROMISC) { 1005 dprintk("%s: set secfilter\n", __func__); 1006 dvb_net_filter_sec_set(dev, &priv->secfilter, mac, mask_normal); 1007 } 1008 1009 switch (priv->rx_mode) { 1010 case RX_MODE_MULTI: 1011 for (i = 0; i < priv->multi_num; i++) { 1012 dprintk("%s: set multi_secfilter[%d]\n", __func__, i); 1013 dvb_net_filter_sec_set(dev, &priv->multi_secfilter[i], 1014 priv->multi_macs[i], mask_normal); 1015 } 1016 break; 1017 case RX_MODE_ALL_MULTI: 1018 priv->multi_num=1; 1019 dprintk("%s: set multi_secfilter[0]\n", __func__); 1020 dvb_net_filter_sec_set(dev, &priv->multi_secfilter[0], 1021 mac_allmulti, mask_allmulti); 1022 break; 1023 case RX_MODE_PROMISC: 1024 priv->multi_num=0; 1025 dprintk("%s: set secfilter\n", __func__); 1026 dvb_net_filter_sec_set(dev, &priv->secfilter, mac, mask_promisc); 1027 break; 1028 } 1029 1030 dprintk("%s: start filtering\n", __func__); 1031 priv->secfeed->start_filtering(priv->secfeed); 1032 } else if (priv->feedtype == DVB_NET_FEEDTYPE_ULE) { 1033 struct timespec timeout = { 0, 10000000 }; // 10 msec 1034 1035 /* we have payloads encapsulated in TS */ 1036 dprintk("%s: alloc tsfeed\n", __func__); 1037 ret = demux->allocate_ts_feed(demux, &priv->tsfeed, dvb_net_ts_callback); 1038 if (ret < 0) { 1039 printk("%s: could not allocate ts feed\n", dev->name); 1040 goto error; 1041 } 1042 1043 /* Set netdevice pointer for ts decaps callback. */ 1044 priv->tsfeed->priv = (void *)dev; 1045 ret = priv->tsfeed->set(priv->tsfeed, 1046 priv->pid, /* pid */ 1047 TS_PACKET, /* type */ 1048 DMX_PES_OTHER, /* pes type */ 1049 32768, /* circular buffer size */ 1050 timeout /* timeout */ 1051 ); 1052 1053 if (ret < 0) { 1054 printk("%s: could not set ts feed\n", dev->name); 1055 priv->demux->release_ts_feed(priv->demux, priv->tsfeed); 1056 priv->tsfeed = NULL; 1057 goto error; 1058 } 1059 1060 dprintk("%s: start filtering\n", __func__); 1061 priv->tsfeed->start_filtering(priv->tsfeed); 1062 } else 1063 ret = -EINVAL; 1064 1065 error: 1066 mutex_unlock(&priv->mutex); 1067 return ret; 1068 } 1069 1070 static int dvb_net_feed_stop(struct net_device *dev) 1071 { 1072 struct dvb_net_priv *priv = netdev_priv(dev); 1073 int i, ret = 0; 1074 1075 dprintk("%s\n", __func__); 1076 mutex_lock(&priv->mutex); 1077 if (priv->feedtype == DVB_NET_FEEDTYPE_MPE) { 1078 if (priv->secfeed) { 1079 if (priv->secfeed->is_filtering) { 1080 dprintk("%s: stop secfeed\n", __func__); 1081 priv->secfeed->stop_filtering(priv->secfeed); 1082 } 1083 1084 if (priv->secfilter) { 1085 dprintk("%s: release secfilter\n", __func__); 1086 priv->secfeed->release_filter(priv->secfeed, 1087 priv->secfilter); 1088 priv->secfilter=NULL; 1089 } 1090 1091 for (i=0; i<priv->multi_num; i++) { 1092 if (priv->multi_secfilter[i]) { 1093 dprintk("%s: release multi_filter[%d]\n", 1094 __func__, i); 1095 priv->secfeed->release_filter(priv->secfeed, 1096 priv->multi_secfilter[i]); 1097 priv->multi_secfilter[i] = NULL; 1098 } 1099 } 1100 1101 priv->demux->release_section_feed(priv->demux, priv->secfeed); 1102 priv->secfeed = NULL; 1103 } else 1104 printk("%s: no feed to stop\n", dev->name); 1105 } else if (priv->feedtype == DVB_NET_FEEDTYPE_ULE) { 1106 if (priv->tsfeed) { 1107 if (priv->tsfeed->is_filtering) { 1108 dprintk("%s: stop tsfeed\n", __func__); 1109 priv->tsfeed->stop_filtering(priv->tsfeed); 1110 } 1111 priv->demux->release_ts_feed(priv->demux, priv->tsfeed); 1112 priv->tsfeed = NULL; 1113 } 1114 else 1115 printk("%s: no ts feed to stop\n", dev->name); 1116 } else 1117 ret = -EINVAL; 1118 mutex_unlock(&priv->mutex); 1119 return ret; 1120 } 1121 1122 1123 static int dvb_set_mc_filter(struct net_device *dev, unsigned char *addr) 1124 { 1125 struct dvb_net_priv *priv = netdev_priv(dev); 1126 1127 if (priv->multi_num == DVB_NET_MULTICAST_MAX) 1128 return -ENOMEM; 1129 1130 memcpy(priv->multi_macs[priv->multi_num], addr, ETH_ALEN); 1131 1132 priv->multi_num++; 1133 return 0; 1134 } 1135 1136 1137 static void wq_set_multicast_list (struct work_struct *work) 1138 { 1139 struct dvb_net_priv *priv = 1140 container_of(work, struct dvb_net_priv, set_multicast_list_wq); 1141 struct net_device *dev = priv->net; 1142 1143 dvb_net_feed_stop(dev); 1144 priv->rx_mode = RX_MODE_UNI; 1145 netif_addr_lock_bh(dev); 1146 1147 if (dev->flags & IFF_PROMISC) { 1148 dprintk("%s: promiscuous mode\n", dev->name); 1149 priv->rx_mode = RX_MODE_PROMISC; 1150 } else if ((dev->flags & IFF_ALLMULTI)) { 1151 dprintk("%s: allmulti mode\n", dev->name); 1152 priv->rx_mode = RX_MODE_ALL_MULTI; 1153 } else if (!netdev_mc_empty(dev)) { 1154 struct netdev_hw_addr *ha; 1155 1156 dprintk("%s: set_mc_list, %d entries\n", 1157 dev->name, netdev_mc_count(dev)); 1158 1159 priv->rx_mode = RX_MODE_MULTI; 1160 priv->multi_num = 0; 1161 1162 netdev_for_each_mc_addr(ha, dev) 1163 dvb_set_mc_filter(dev, ha->addr); 1164 } 1165 1166 netif_addr_unlock_bh(dev); 1167 dvb_net_feed_start(dev); 1168 } 1169 1170 1171 static void dvb_net_set_multicast_list (struct net_device *dev) 1172 { 1173 struct dvb_net_priv *priv = netdev_priv(dev); 1174 schedule_work(&priv->set_multicast_list_wq); 1175 } 1176 1177 1178 static void wq_restart_net_feed (struct work_struct *work) 1179 { 1180 struct dvb_net_priv *priv = 1181 container_of(work, struct dvb_net_priv, restart_net_feed_wq); 1182 struct net_device *dev = priv->net; 1183 1184 if (netif_running(dev)) { 1185 dvb_net_feed_stop(dev); 1186 dvb_net_feed_start(dev); 1187 } 1188 } 1189 1190 1191 static int dvb_net_set_mac (struct net_device *dev, void *p) 1192 { 1193 struct dvb_net_priv *priv = netdev_priv(dev); 1194 struct sockaddr *addr=p; 1195 1196 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len); 1197 1198 if (netif_running(dev)) 1199 schedule_work(&priv->restart_net_feed_wq); 1200 1201 return 0; 1202 } 1203 1204 1205 static int dvb_net_open(struct net_device *dev) 1206 { 1207 struct dvb_net_priv *priv = netdev_priv(dev); 1208 1209 priv->in_use++; 1210 dvb_net_feed_start(dev); 1211 return 0; 1212 } 1213 1214 1215 static int dvb_net_stop(struct net_device *dev) 1216 { 1217 struct dvb_net_priv *priv = netdev_priv(dev); 1218 1219 priv->in_use--; 1220 return dvb_net_feed_stop(dev); 1221 } 1222 1223 static const struct header_ops dvb_header_ops = { 1224 .create = eth_header, 1225 .parse = eth_header_parse, 1226 .rebuild = eth_rebuild_header, 1227 }; 1228 1229 1230 static const struct net_device_ops dvb_netdev_ops = { 1231 .ndo_open = dvb_net_open, 1232 .ndo_stop = dvb_net_stop, 1233 .ndo_start_xmit = dvb_net_tx, 1234 .ndo_set_rx_mode = dvb_net_set_multicast_list, 1235 .ndo_set_mac_address = dvb_net_set_mac, 1236 .ndo_change_mtu = eth_change_mtu, 1237 .ndo_validate_addr = eth_validate_addr, 1238 }; 1239 1240 static void dvb_net_setup(struct net_device *dev) 1241 { 1242 ether_setup(dev); 1243 1244 dev->header_ops = &dvb_header_ops; 1245 dev->netdev_ops = &dvb_netdev_ops; 1246 dev->mtu = 4096; 1247 1248 dev->flags |= IFF_NOARP; 1249 } 1250 1251 static int get_if(struct dvb_net *dvbnet) 1252 { 1253 int i; 1254 1255 for (i=0; i<DVB_NET_DEVICES_MAX; i++) 1256 if (!dvbnet->state[i]) 1257 break; 1258 1259 if (i == DVB_NET_DEVICES_MAX) 1260 return -1; 1261 1262 dvbnet->state[i]=1; 1263 return i; 1264 } 1265 1266 static int dvb_net_add_if(struct dvb_net *dvbnet, u16 pid, u8 feedtype) 1267 { 1268 struct net_device *net; 1269 struct dvb_net_priv *priv; 1270 int result; 1271 int if_num; 1272 1273 if (feedtype != DVB_NET_FEEDTYPE_MPE && feedtype != DVB_NET_FEEDTYPE_ULE) 1274 return -EINVAL; 1275 if ((if_num = get_if(dvbnet)) < 0) 1276 return -EINVAL; 1277 1278 net = alloc_netdev(sizeof(struct dvb_net_priv), "dvb", 1279 NET_NAME_UNKNOWN, dvb_net_setup); 1280 if (!net) 1281 return -ENOMEM; 1282 1283 if (dvbnet->dvbdev->id) 1284 snprintf(net->name, IFNAMSIZ, "dvb%d%u%d", 1285 dvbnet->dvbdev->adapter->num, dvbnet->dvbdev->id, if_num); 1286 else 1287 /* compatibility fix to keep dvb0_0 format */ 1288 snprintf(net->name, IFNAMSIZ, "dvb%d_%d", 1289 dvbnet->dvbdev->adapter->num, if_num); 1290 1291 net->addr_len = 6; 1292 memcpy(net->dev_addr, dvbnet->dvbdev->adapter->proposed_mac, 6); 1293 1294 dvbnet->device[if_num] = net; 1295 1296 priv = netdev_priv(net); 1297 priv->net = net; 1298 priv->demux = dvbnet->demux; 1299 priv->pid = pid; 1300 priv->rx_mode = RX_MODE_UNI; 1301 priv->need_pusi = 1; 1302 priv->tscc = 0; 1303 priv->feedtype = feedtype; 1304 reset_ule(priv); 1305 1306 INIT_WORK(&priv->set_multicast_list_wq, wq_set_multicast_list); 1307 INIT_WORK(&priv->restart_net_feed_wq, wq_restart_net_feed); 1308 mutex_init(&priv->mutex); 1309 1310 net->base_addr = pid; 1311 1312 if ((result = register_netdev(net)) < 0) { 1313 dvbnet->device[if_num] = NULL; 1314 free_netdev(net); 1315 return result; 1316 } 1317 printk("dvb_net: created network interface %s\n", net->name); 1318 1319 return if_num; 1320 } 1321 1322 static int dvb_net_remove_if(struct dvb_net *dvbnet, unsigned long num) 1323 { 1324 struct net_device *net = dvbnet->device[num]; 1325 struct dvb_net_priv *priv; 1326 1327 if (!dvbnet->state[num]) 1328 return -EINVAL; 1329 priv = netdev_priv(net); 1330 if (priv->in_use) 1331 return -EBUSY; 1332 1333 dvb_net_stop(net); 1334 flush_work(&priv->set_multicast_list_wq); 1335 flush_work(&priv->restart_net_feed_wq); 1336 printk("dvb_net: removed network interface %s\n", net->name); 1337 unregister_netdev(net); 1338 dvbnet->state[num]=0; 1339 dvbnet->device[num] = NULL; 1340 free_netdev(net); 1341 1342 return 0; 1343 } 1344 1345 static int dvb_net_do_ioctl(struct file *file, 1346 unsigned int cmd, void *parg) 1347 { 1348 struct dvb_device *dvbdev = file->private_data; 1349 struct dvb_net *dvbnet = dvbdev->priv; 1350 int ret = 0; 1351 1352 if (((file->f_flags&O_ACCMODE)==O_RDONLY)) 1353 return -EPERM; 1354 1355 if (mutex_lock_interruptible(&dvbnet->ioctl_mutex)) 1356 return -ERESTARTSYS; 1357 1358 switch (cmd) { 1359 case NET_ADD_IF: 1360 { 1361 struct dvb_net_if *dvbnetif = parg; 1362 int result; 1363 1364 if (!capable(CAP_SYS_ADMIN)) { 1365 ret = -EPERM; 1366 goto ioctl_error; 1367 } 1368 1369 if (!try_module_get(dvbdev->adapter->module)) { 1370 ret = -EPERM; 1371 goto ioctl_error; 1372 } 1373 1374 result=dvb_net_add_if(dvbnet, dvbnetif->pid, dvbnetif->feedtype); 1375 if (result<0) { 1376 module_put(dvbdev->adapter->module); 1377 ret = result; 1378 goto ioctl_error; 1379 } 1380 dvbnetif->if_num=result; 1381 break; 1382 } 1383 case NET_GET_IF: 1384 { 1385 struct net_device *netdev; 1386 struct dvb_net_priv *priv_data; 1387 struct dvb_net_if *dvbnetif = parg; 1388 1389 if (dvbnetif->if_num >= DVB_NET_DEVICES_MAX || 1390 !dvbnet->state[dvbnetif->if_num]) { 1391 ret = -EINVAL; 1392 goto ioctl_error; 1393 } 1394 1395 netdev = dvbnet->device[dvbnetif->if_num]; 1396 1397 priv_data = netdev_priv(netdev); 1398 dvbnetif->pid=priv_data->pid; 1399 dvbnetif->feedtype=priv_data->feedtype; 1400 break; 1401 } 1402 case NET_REMOVE_IF: 1403 { 1404 if (!capable(CAP_SYS_ADMIN)) { 1405 ret = -EPERM; 1406 goto ioctl_error; 1407 } 1408 if ((unsigned long) parg >= DVB_NET_DEVICES_MAX) { 1409 ret = -EINVAL; 1410 goto ioctl_error; 1411 } 1412 ret = dvb_net_remove_if(dvbnet, (unsigned long) parg); 1413 if (!ret) 1414 module_put(dvbdev->adapter->module); 1415 break; 1416 } 1417 1418 /* binary compatibility cruft */ 1419 case __NET_ADD_IF_OLD: 1420 { 1421 struct __dvb_net_if_old *dvbnetif = parg; 1422 int result; 1423 1424 if (!capable(CAP_SYS_ADMIN)) { 1425 ret = -EPERM; 1426 goto ioctl_error; 1427 } 1428 1429 if (!try_module_get(dvbdev->adapter->module)) { 1430 ret = -EPERM; 1431 goto ioctl_error; 1432 } 1433 1434 result=dvb_net_add_if(dvbnet, dvbnetif->pid, DVB_NET_FEEDTYPE_MPE); 1435 if (result<0) { 1436 module_put(dvbdev->adapter->module); 1437 ret = result; 1438 goto ioctl_error; 1439 } 1440 dvbnetif->if_num=result; 1441 break; 1442 } 1443 case __NET_GET_IF_OLD: 1444 { 1445 struct net_device *netdev; 1446 struct dvb_net_priv *priv_data; 1447 struct __dvb_net_if_old *dvbnetif = parg; 1448 1449 if (dvbnetif->if_num >= DVB_NET_DEVICES_MAX || 1450 !dvbnet->state[dvbnetif->if_num]) { 1451 ret = -EINVAL; 1452 goto ioctl_error; 1453 } 1454 1455 netdev = dvbnet->device[dvbnetif->if_num]; 1456 1457 priv_data = netdev_priv(netdev); 1458 dvbnetif->pid=priv_data->pid; 1459 break; 1460 } 1461 default: 1462 ret = -ENOTTY; 1463 break; 1464 } 1465 1466 ioctl_error: 1467 mutex_unlock(&dvbnet->ioctl_mutex); 1468 return ret; 1469 } 1470 1471 static long dvb_net_ioctl(struct file *file, 1472 unsigned int cmd, unsigned long arg) 1473 { 1474 return dvb_usercopy(file, cmd, arg, dvb_net_do_ioctl); 1475 } 1476 1477 static int dvb_net_close(struct inode *inode, struct file *file) 1478 { 1479 struct dvb_device *dvbdev = file->private_data; 1480 struct dvb_net *dvbnet = dvbdev->priv; 1481 1482 dvb_generic_release(inode, file); 1483 1484 if(dvbdev->users == 1 && dvbnet->exit == 1) 1485 wake_up(&dvbdev->wait_queue); 1486 return 0; 1487 } 1488 1489 1490 static const struct file_operations dvb_net_fops = { 1491 .owner = THIS_MODULE, 1492 .unlocked_ioctl = dvb_net_ioctl, 1493 .open = dvb_generic_open, 1494 .release = dvb_net_close, 1495 .llseek = noop_llseek, 1496 }; 1497 1498 static struct dvb_device dvbdev_net = { 1499 .priv = NULL, 1500 .users = 1, 1501 .writers = 1, 1502 .fops = &dvb_net_fops, 1503 }; 1504 1505 1506 void dvb_net_release (struct dvb_net *dvbnet) 1507 { 1508 int i; 1509 1510 dvbnet->exit = 1; 1511 if (dvbnet->dvbdev->users < 1) 1512 wait_event(dvbnet->dvbdev->wait_queue, 1513 dvbnet->dvbdev->users==1); 1514 1515 dvb_unregister_device(dvbnet->dvbdev); 1516 1517 for (i=0; i<DVB_NET_DEVICES_MAX; i++) { 1518 if (!dvbnet->state[i]) 1519 continue; 1520 dvb_net_remove_if(dvbnet, i); 1521 } 1522 } 1523 EXPORT_SYMBOL(dvb_net_release); 1524 1525 1526 int dvb_net_init (struct dvb_adapter *adap, struct dvb_net *dvbnet, 1527 struct dmx_demux *dmx) 1528 { 1529 int i; 1530 1531 mutex_init(&dvbnet->ioctl_mutex); 1532 dvbnet->demux = dmx; 1533 1534 for (i=0; i<DVB_NET_DEVICES_MAX; i++) 1535 dvbnet->state[i] = 0; 1536 1537 return dvb_register_device(adap, &dvbnet->dvbdev, &dvbdev_net, 1538 dvbnet, DVB_DEVICE_NET); 1539 } 1540 EXPORT_SYMBOL(dvb_net_init); 1541