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 71static int dvb_net_debug; 72module_param(dvb_net_debug, int, 0444); 73MODULE_PARM_DESC(dvb_net_debug, "enable debug messages"); 74 75#define dprintk(x...) do { if (dvb_net_debug) printk(x); } while (0) 76 77 78static inline __u32 iov_crc32( __u32 c, struct kvec *iov, unsigned int cnt ) 79{ 80 unsigned int j; 81 for (j = 0; j < cnt; j++) 82 c = crc32_be( c, iov[j].iov_base, iov[j].iov_len ); 83 return c; 84} 85 86 87#define DVB_NET_MULTICAST_MAX 10 88 89#undef ULE_DEBUG 90 91#ifdef ULE_DEBUG 92 93#define MAC_ADDR_PRINTFMT "%.2x:%.2x:%.2x:%.2x:%.2x:%.2x" 94#define MAX_ADDR_PRINTFMT_ARGS(macap) (macap)[0],(macap)[1],(macap)[2],(macap)[3],(macap)[4],(macap)[5] 95 96#define isprint(c) ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || (c >= '0' && c <= '9')) 97 98static void hexdump( const unsigned char *buf, unsigned short len ) 99{ 100 char str[80], octet[10]; 101 int ofs, i, l; 102 103 for (ofs = 0; ofs < len; ofs += 16) { 104 sprintf( str, "%03d: ", ofs ); 105 106 for (i = 0; i < 16; i++) { 107 if ((i + ofs) < len) 108 sprintf( octet, "%02x ", buf[ofs + i] ); 109 else 110 strcpy( octet, " " ); 111 112 strcat( str, octet ); 113 } 114 strcat( str, " " ); 115 l = strlen( str ); 116 117 for (i = 0; (i < 16) && ((i + ofs) < len); i++) 118 str[l++] = isprint( buf[ofs + i] ) ? buf[ofs + i] : '.'; 119 120 str[l] = '\0'; 121 printk( KERN_WARNING "%s\n", str ); 122 } 123} 124 125#endif 126 127struct dvb_net_priv { 128 int in_use; 129 u16 pid; 130 struct net_device *net; 131 struct dvb_net *host; 132 struct dmx_demux *demux; 133 struct dmx_section_feed *secfeed; 134 struct dmx_section_filter *secfilter; 135 struct dmx_ts_feed *tsfeed; 136 int multi_num; 137 struct dmx_section_filter *multi_secfilter[DVB_NET_MULTICAST_MAX]; 138 unsigned char multi_macs[DVB_NET_MULTICAST_MAX][6]; 139 int rx_mode; 140#define RX_MODE_UNI 0 141#define RX_MODE_MULTI 1 142#define RX_MODE_ALL_MULTI 2 143#define RX_MODE_PROMISC 3 144 struct work_struct set_multicast_list_wq; 145 struct work_struct restart_net_feed_wq; 146 unsigned char feedtype; /* Either FEED_TYPE_ or FEED_TYPE_ULE */ 147 int need_pusi; /* Set to 1, if synchronization on PUSI required. */ 148 unsigned char tscc; /* TS continuity counter after sync on PUSI. */ 149 struct sk_buff *ule_skb; /* ULE SNDU decodes into this buffer. */ 150 unsigned char *ule_next_hdr; /* Pointer into skb to next ULE extension header. */ 151 unsigned short ule_sndu_len; /* ULE SNDU length in bytes, w/o D-Bit. */ 152 unsigned short ule_sndu_type; /* ULE SNDU type field, complete. */ 153 unsigned char ule_sndu_type_1; /* ULE SNDU type field, if split across 2 TS cells. */ 154 unsigned char ule_dbit; /* Whether the DestMAC address present 155 * or not (bit is set). */ 156 unsigned char ule_bridged; /* Whether the ULE_BRIDGED extension header was found. */ 157 int ule_sndu_remain; /* Nr. of bytes still required for current ULE SNDU. */ 158 unsigned long ts_count; /* Current ts cell counter. */ 159 struct mutex mutex; 160}; 161 162 163/** 164 * Determine the packet's protocol ID. The rule here is that we 165 * assume 802.3 if the type field is short enough to be a length. 166 * This is normal practice and works for any 'now in use' protocol. 167 * 168 * stolen from eth.c out of the linux kernel, hacked for dvb-device 169 * by Michael Holzt <kju@debian.org> 170 */ 171static __be16 dvb_net_eth_type_trans(struct sk_buff *skb, 172 struct net_device *dev) 173{ 174 struct ethhdr *eth; 175 unsigned char *rawp; 176 177 skb_reset_mac_header(skb); 178 skb_pull(skb,dev->hard_header_len); 179 eth = eth_hdr(skb); 180 181 if (*eth->h_dest & 1) { 182 if(ether_addr_equal(eth->h_dest,dev->broadcast)) 183 skb->pkt_type=PACKET_BROADCAST; 184 else 185 skb->pkt_type=PACKET_MULTICAST; 186 } 187 188 if (ntohs(eth->h_proto) >= ETH_P_802_3_MIN) 189 return eth->h_proto; 190 191 rawp = skb->data; 192 193 /** 194 * This is a magic hack to spot IPX packets. Older Novell breaks 195 * the protocol design and runs IPX over 802.3 without an 802.2 LLC 196 * layer. We look for FFFF which isn't a used 802.2 SSAP/DSAP. This 197 * won't work for fault tolerant netware but does for the rest. 198 */ 199 if (*(unsigned short *)rawp == 0xFFFF) 200 return htons(ETH_P_802_3); 201 202 /** 203 * Real 802.2 LLC 204 */ 205 return htons(ETH_P_802_2); 206} 207 208#define TS_SZ 188 209#define TS_SYNC 0x47 210#define TS_TEI 0x80 211#define TS_SC 0xC0 212#define TS_PUSI 0x40 213#define TS_AF_A 0x20 214#define TS_AF_D 0x10 215 216/* ULE Extension Header handlers. */ 217 218#define ULE_TEST 0 219#define ULE_BRIDGED 1 220 221#define ULE_OPTEXTHDR_PADDING 0 222 223static int ule_test_sndu( struct dvb_net_priv *p ) 224{ 225 return -1; 226} 227 228static int ule_bridged_sndu( struct dvb_net_priv *p ) 229{ 230 struct ethhdr *hdr = (struct ethhdr*) p->ule_next_hdr; 231 if(ntohs(hdr->h_proto) < ETH_P_802_3_MIN) { 232 int framelen = p->ule_sndu_len - ((p->ule_next_hdr+sizeof(struct ethhdr)) - p->ule_skb->data); 233 /* A frame Type < ETH_P_802_3_MIN for a bridged frame, introduces a LLC Length field. */ 234 if(framelen != ntohs(hdr->h_proto)) { 235 return -1; 236 } 237 } 238 /* Note: 239 * From RFC4326: 240 * "A bridged SNDU is a Mandatory Extension Header of Type 1. 241 * It must be the final (or only) extension header specified in the header chain of a SNDU." 242 * The 'ule_bridged' flag will cause the extension header processing loop to terminate. 243 */ 244 p->ule_bridged = 1; 245 return 0; 246} 247 248static int ule_exthdr_padding(struct dvb_net_priv *p) 249{ 250 return 0; 251} 252 253/** Handle ULE extension headers. 254 * Function is called after a successful CRC32 verification of an ULE SNDU to complete its decoding. 255 * Returns: >= 0: nr. of bytes consumed by next extension header 256 * -1: Mandatory extension header that is not recognized or TEST SNDU; discard. 257 */ 258static int handle_one_ule_extension( struct dvb_net_priv *p ) 259{ 260 /* Table of mandatory extension header handlers. The header type is the index. */ 261 static int (*ule_mandatory_ext_handlers[255])( struct dvb_net_priv *p ) = 262 { [0] = ule_test_sndu, [1] = ule_bridged_sndu, [2] = NULL, }; 263 264 /* Table of optional extension header handlers. The header type is the index. */ 265 static int (*ule_optional_ext_handlers[255])( struct dvb_net_priv *p ) = 266 { [0] = ule_exthdr_padding, [1] = NULL, }; 267 268 int ext_len = 0; 269 unsigned char hlen = (p->ule_sndu_type & 0x0700) >> 8; 270 unsigned char htype = p->ule_sndu_type & 0x00FF; 271 272 /* Discriminate mandatory and optional extension headers. */ 273 if (hlen == 0) { 274 /* Mandatory extension header */ 275 if (ule_mandatory_ext_handlers[htype]) { 276 ext_len = ule_mandatory_ext_handlers[htype]( p ); 277 if(ext_len >= 0) { 278 p->ule_next_hdr += ext_len; 279 if (!p->ule_bridged) { 280 p->ule_sndu_type = ntohs(*(__be16 *)p->ule_next_hdr); 281 p->ule_next_hdr += 2; 282 } else { 283 p->ule_sndu_type = ntohs(*(__be16 *)(p->ule_next_hdr + ((p->ule_dbit ? 2 : 3) * ETH_ALEN))); 284 /* This assures the extension handling loop will terminate. */ 285 } 286 } 287 // else: extension handler failed or SNDU should be discarded 288 } else 289 ext_len = -1; /* SNDU has to be discarded. */ 290 } else { 291 /* Optional extension header. Calculate the length. */ 292 ext_len = hlen << 1; 293 /* Process the optional extension header according to its type. */ 294 if (ule_optional_ext_handlers[htype]) 295 (void)ule_optional_ext_handlers[htype]( p ); 296 p->ule_next_hdr += ext_len; 297 p->ule_sndu_type = ntohs( *(__be16 *)(p->ule_next_hdr-2) ); 298 /* 299 * note: the length of the next header type is included in the 300 * length of THIS optional extension header 301 */ 302 } 303 304 return ext_len; 305} 306 307static int handle_ule_extensions( struct dvb_net_priv *p ) 308{ 309 int total_ext_len = 0, l; 310 311 p->ule_next_hdr = p->ule_skb->data; 312 do { 313 l = handle_one_ule_extension( p ); 314 if (l < 0) 315 return l; /* Stop extension header processing and discard SNDU. */ 316 total_ext_len += l; 317#ifdef ULE_DEBUG 318 dprintk("handle_ule_extensions: ule_next_hdr=%p, ule_sndu_type=%i, " 319 "l=%i, total_ext_len=%i\n", p->ule_next_hdr, 320 (int) p->ule_sndu_type, l, total_ext_len); 321#endif 322 323 } while (p->ule_sndu_type < ETH_P_802_3_MIN); 324 325 return total_ext_len; 326} 327 328 329/** Prepare for a new ULE SNDU: reset the decoder state. */ 330static inline void reset_ule( struct dvb_net_priv *p ) 331{ 332 p->ule_skb = NULL; 333 p->ule_next_hdr = NULL; 334 p->ule_sndu_len = 0; 335 p->ule_sndu_type = 0; 336 p->ule_sndu_type_1 = 0; 337 p->ule_sndu_remain = 0; 338 p->ule_dbit = 0xFF; 339 p->ule_bridged = 0; 340} 341 342/** 343 * Decode ULE SNDUs according to draft-ietf-ipdvb-ule-03.txt from a sequence of 344 * TS cells of a single PID. 345 */ 346static void dvb_net_ule( struct net_device *dev, const u8 *buf, size_t buf_len ) 347{ 348 struct dvb_net_priv *priv = netdev_priv(dev); 349 unsigned long skipped = 0L; 350 const u8 *ts, *ts_end, *from_where = NULL; 351 u8 ts_remain = 0, how_much = 0, new_ts = 1; 352 struct ethhdr *ethh = NULL; 353 bool error = false; 354 355#ifdef ULE_DEBUG 356 /* The code inside ULE_DEBUG keeps a history of the last 100 TS cells processed. */ 357 static unsigned char ule_hist[100*TS_SZ]; 358 static unsigned char *ule_where = ule_hist, ule_dump; 359#endif 360 361 /* For all TS cells in current buffer. 362 * Appearently, we are called for every single TS cell. 363 */ 364 for (ts = buf, ts_end = buf + buf_len; ts < ts_end; /* no default incr. */ ) { 365 366 if (new_ts) { 367 /* We are about to process a new TS cell. */ 368 369#ifdef ULE_DEBUG 370 if (ule_where >= &ule_hist[100*TS_SZ]) ule_where = ule_hist; 371 memcpy( ule_where, ts, TS_SZ ); 372 if (ule_dump) { 373 hexdump( ule_where, TS_SZ ); 374 ule_dump = 0; 375 } 376 ule_where += TS_SZ; 377#endif 378 379 /* Check TS error conditions: sync_byte, transport_error_indicator, scrambling_control . */ 380 if ((ts[0] != TS_SYNC) || (ts[1] & TS_TEI) || ((ts[3] & TS_SC) != 0)) { 381 printk(KERN_WARNING "%lu: Invalid TS cell: SYNC %#x, TEI %u, SC %#x.\n", 382 priv->ts_count, ts[0], ts[1] & TS_TEI >> 7, ts[3] & 0xC0 >> 6); 383 384 /* Drop partly decoded SNDU, reset state, resync on PUSI. */ 385 if (priv->ule_skb) { 386 dev_kfree_skb( priv->ule_skb ); 387 /* Prepare for next SNDU. */ 388 dev->stats.rx_errors++; 389 dev->stats.rx_frame_errors++; 390 } 391 reset_ule(priv); 392 priv->need_pusi = 1; 393 394 /* Continue with next TS cell. */ 395 ts += TS_SZ; 396 priv->ts_count++; 397 continue; 398 } 399 400 ts_remain = 184; 401 from_where = ts + 4; 402 } 403 /* Synchronize on PUSI, if required. */ 404 if (priv->need_pusi) { 405 if (ts[1] & TS_PUSI) { 406 /* Find beginning of first ULE SNDU in current TS cell. */ 407 /* Synchronize continuity counter. */ 408 priv->tscc = ts[3] & 0x0F; 409 /* There is a pointer field here. */ 410 if (ts[4] > ts_remain) { 411 printk(KERN_ERR "%lu: Invalid ULE packet " 412 "(pointer field %d)\n", priv->ts_count, ts[4]); 413 ts += TS_SZ; 414 priv->ts_count++; 415 continue; 416 } 417 /* Skip to destination of pointer field. */ 418 from_where = &ts[5] + ts[4]; 419 ts_remain -= 1 + ts[4]; 420 skipped = 0; 421 } else { 422 skipped++; 423 ts += TS_SZ; 424 priv->ts_count++; 425 continue; 426 } 427 } 428 429 if (new_ts) { 430 /* Check continuity counter. */ 431 if ((ts[3] & 0x0F) == priv->tscc) 432 priv->tscc = (priv->tscc + 1) & 0x0F; 433 else { 434 /* TS discontinuity handling: */ 435 printk(KERN_WARNING "%lu: TS discontinuity: got %#x, " 436 "expected %#x.\n", priv->ts_count, ts[3] & 0x0F, priv->tscc); 437 /* Drop partly decoded SNDU, reset state, resync on PUSI. */ 438 if (priv->ule_skb) { 439 dev_kfree_skb( priv->ule_skb ); 440 /* Prepare for next SNDU. */ 441 // reset_ule(priv); moved to below. 442 dev->stats.rx_errors++; 443 dev->stats.rx_frame_errors++; 444 } 445 reset_ule(priv); 446 /* skip to next PUSI. */ 447 priv->need_pusi = 1; 448 continue; 449 } 450 /* If we still have an incomplete payload, but PUSI is 451 * set; some TS cells are missing. 452 * This is only possible here, if we missed exactly 16 TS 453 * cells (continuity counter wrap). */ 454 if (ts[1] & TS_PUSI) { 455 if (! priv->need_pusi) { 456 if (!(*from_where < (ts_remain-1)) || *from_where != priv->ule_sndu_remain) { 457 /* Pointer field is invalid. Drop this TS cell and any started ULE SNDU. */ 458 printk(KERN_WARNING "%lu: Invalid pointer " 459 "field: %u.\n", priv->ts_count, *from_where); 460 461 /* Drop partly decoded SNDU, reset state, resync on PUSI. */ 462 if (priv->ule_skb) { 463 error = true; 464 dev_kfree_skb(priv->ule_skb); 465 } 466 467 if (error || priv->ule_sndu_remain) { 468 dev->stats.rx_errors++; 469 dev->stats.rx_frame_errors++; 470 error = false; 471 } 472 473 reset_ule(priv); 474 priv->need_pusi = 1; 475 continue; 476 } 477 /* Skip pointer field (we're processing a 478 * packed payload). */ 479 from_where += 1; 480 ts_remain -= 1; 481 } else 482 priv->need_pusi = 0; 483 484 if (priv->ule_sndu_remain > 183) { 485 /* Current SNDU lacks more data than there could be available in the 486 * current TS cell. */ 487 dev->stats.rx_errors++; 488 dev->stats.rx_length_errors++; 489 printk(KERN_WARNING "%lu: Expected %d more SNDU bytes, but " 490 "got PUSI (pf %d, ts_remain %d). Flushing incomplete payload.\n", 491 priv->ts_count, priv->ule_sndu_remain, ts[4], ts_remain); 492 dev_kfree_skb(priv->ule_skb); 493 /* Prepare for next SNDU. */ 494 reset_ule(priv); 495 /* Resync: go to where pointer field points to: start of next ULE SNDU. */ 496 from_where += ts[4]; 497 ts_remain -= ts[4]; 498 } 499 } 500 } 501 502 /* Check if new payload needs to be started. */ 503 if (priv->ule_skb == NULL) { 504 /* Start a new payload with skb. 505 * Find ULE header. It is only guaranteed that the 506 * length field (2 bytes) is contained in the current 507 * TS. 508 * Check ts_remain has to be >= 2 here. */ 509 if (ts_remain < 2) { 510 printk(KERN_WARNING "Invalid payload packing: only %d " 511 "bytes left in TS. Resyncing.\n", ts_remain); 512 priv->ule_sndu_len = 0; 513 priv->need_pusi = 1; 514 ts += TS_SZ; 515 continue; 516 } 517 518 if (! priv->ule_sndu_len) { 519 /* Got at least two bytes, thus extrace the SNDU length. */ 520 priv->ule_sndu_len = from_where[0] << 8 | from_where[1]; 521 if (priv->ule_sndu_len & 0x8000) { 522 /* D-Bit is set: no dest mac present. */ 523 priv->ule_sndu_len &= 0x7FFF; 524 priv->ule_dbit = 1; 525 } else 526 priv->ule_dbit = 0; 527 528 if (priv->ule_sndu_len < 5) { 529 printk(KERN_WARNING "%lu: Invalid ULE SNDU length %u. " 530 "Resyncing.\n", priv->ts_count, priv->ule_sndu_len); 531 dev->stats.rx_errors++; 532 dev->stats.rx_length_errors++; 533 priv->ule_sndu_len = 0; 534 priv->need_pusi = 1; 535 new_ts = 1; 536 ts += TS_SZ; 537 priv->ts_count++; 538 continue; 539 } 540 ts_remain -= 2; /* consume the 2 bytes SNDU length. */ 541 from_where += 2; 542 } 543 544 priv->ule_sndu_remain = priv->ule_sndu_len + 2; 545 /* 546 * State of current TS: 547 * ts_remain (remaining bytes in the current TS cell) 548 * 0 ule_type is not available now, we need the next TS cell 549 * 1 the first byte of the ule_type is present 550 * >=2 full ULE header present, maybe some payload data as well. 551 */ 552 switch (ts_remain) { 553 case 1: 554 priv->ule_sndu_remain--; 555 priv->ule_sndu_type = from_where[0] << 8; 556 priv->ule_sndu_type_1 = 1; /* first byte of ule_type is set. */ 557 ts_remain -= 1; from_where += 1; 558 /* Continue w/ next TS. */ 559 case 0: 560 new_ts = 1; 561 ts += TS_SZ; 562 priv->ts_count++; 563 continue; 564 565 default: /* complete ULE header is present in current TS. */ 566 /* Extract ULE type field. */ 567 if (priv->ule_sndu_type_1) { 568 priv->ule_sndu_type_1 = 0; 569 priv->ule_sndu_type |= from_where[0]; 570 from_where += 1; /* points to payload start. */ 571 ts_remain -= 1; 572 } else { 573 /* Complete type is present in new TS. */ 574 priv->ule_sndu_type = from_where[0] << 8 | from_where[1]; 575 from_where += 2; /* points to payload start. */ 576 ts_remain -= 2; 577 } 578 break; 579 } 580 581 /* Allocate the skb (decoder target buffer) with the correct size, as follows: 582 * prepare for the largest case: bridged SNDU with MAC address (dbit = 0). */ 583 priv->ule_skb = dev_alloc_skb( priv->ule_sndu_len + ETH_HLEN + ETH_ALEN ); 584 if (priv->ule_skb == NULL) { 585 printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n", 586 dev->name); 587 dev->stats.rx_dropped++; 588 return; 589 } 590 591 /* This includes the CRC32 _and_ dest mac, if !dbit. */ 592 priv->ule_sndu_remain = priv->ule_sndu_len; 593 priv->ule_skb->dev = dev; 594 /* Leave space for Ethernet or bridged SNDU header (eth hdr plus one MAC addr). */ 595 skb_reserve( priv->ule_skb, ETH_HLEN + ETH_ALEN ); 596 } 597 598 /* Copy data into our current skb. */ 599 how_much = min(priv->ule_sndu_remain, (int)ts_remain); 600 memcpy(skb_put(priv->ule_skb, how_much), from_where, how_much); 601 priv->ule_sndu_remain -= how_much; 602 ts_remain -= how_much; 603 from_where += how_much; 604 605 /* Check for complete payload. */ 606 if (priv->ule_sndu_remain <= 0) { 607 /* Check CRC32, we've got it in our skb already. */ 608 __be16 ulen = htons(priv->ule_sndu_len); 609 __be16 utype = htons(priv->ule_sndu_type); 610 const u8 *tail; 611 struct kvec iov[3] = { 612 { &ulen, sizeof ulen }, 613 { &utype, sizeof utype }, 614 { priv->ule_skb->data, priv->ule_skb->len - 4 } 615 }; 616 u32 ule_crc = ~0L, expected_crc; 617 if (priv->ule_dbit) { 618 /* Set D-bit for CRC32 verification, 619 * if it was set originally. */ 620 ulen |= htons(0x8000); 621 } 622 623 ule_crc = iov_crc32(ule_crc, iov, 3); 624 tail = skb_tail_pointer(priv->ule_skb); 625 expected_crc = *(tail - 4) << 24 | 626 *(tail - 3) << 16 | 627 *(tail - 2) << 8 | 628 *(tail - 1); 629 if (ule_crc != expected_crc) { 630 printk(KERN_WARNING "%lu: CRC32 check FAILED: %08x / %08x, SNDU len %d type %#x, ts_remain %d, next 2: %x.\n", 631 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); 632 633#ifdef ULE_DEBUG 634 hexdump( iov[0].iov_base, iov[0].iov_len ); 635 hexdump( iov[1].iov_base, iov[1].iov_len ); 636 hexdump( iov[2].iov_base, iov[2].iov_len ); 637 638 if (ule_where == ule_hist) { 639 hexdump( &ule_hist[98*TS_SZ], TS_SZ ); 640 hexdump( &ule_hist[99*TS_SZ], TS_SZ ); 641 } else if (ule_where == &ule_hist[TS_SZ]) { 642 hexdump( &ule_hist[99*TS_SZ], TS_SZ ); 643 hexdump( ule_hist, TS_SZ ); 644 } else { 645 hexdump( ule_where - TS_SZ - TS_SZ, TS_SZ ); 646 hexdump( ule_where - TS_SZ, TS_SZ ); 647 } 648 ule_dump = 1; 649#endif 650 651 dev->stats.rx_errors++; 652 dev->stats.rx_crc_errors++; 653 dev_kfree_skb(priv->ule_skb); 654 } else { 655 /* CRC32 verified OK. */ 656 u8 dest_addr[ETH_ALEN]; 657 static const u8 bc_addr[ETH_ALEN] = 658 { [ 0 ... ETH_ALEN-1] = 0xff }; 659 660 /* CRC32 was OK. Remove it from skb. */ 661 priv->ule_skb->tail -= 4; 662 priv->ule_skb->len -= 4; 663 664 if (!priv->ule_dbit) { 665 /* 666 * The destination MAC address is the 667 * next data in the skb. It comes 668 * before any extension headers. 669 * 670 * Check if the payload of this SNDU 671 * should be passed up the stack. 672 */ 673 register int drop = 0; 674 if (priv->rx_mode != RX_MODE_PROMISC) { 675 if (priv->ule_skb->data[0] & 0x01) { 676 /* multicast or broadcast */ 677 if (!ether_addr_equal(priv->ule_skb->data, bc_addr)) { 678 /* multicast */ 679 if (priv->rx_mode == RX_MODE_MULTI) { 680 int i; 681 for(i = 0; i < priv->multi_num && 682 !ether_addr_equal(priv->ule_skb->data, 683 priv->multi_macs[i]); i++) 684 ; 685 if (i == priv->multi_num) 686 drop = 1; 687 } else if (priv->rx_mode != RX_MODE_ALL_MULTI) 688 drop = 1; /* no broadcast; */ 689 /* else: all multicast mode: accept all multicast packets */ 690 } 691 /* else: broadcast */ 692 } 693 else if (!ether_addr_equal(priv->ule_skb->data, dev->dev_addr)) 694 drop = 1; 695 /* else: destination address matches the MAC address of our receiver device */ 696 } 697 /* else: promiscuous mode; pass everything up the stack */ 698 699 if (drop) { 700#ifdef ULE_DEBUG 701 dprintk("Dropping SNDU: MAC destination address does not match: dest addr: "MAC_ADDR_PRINTFMT", dev addr: "MAC_ADDR_PRINTFMT"\n", 702 MAX_ADDR_PRINTFMT_ARGS(priv->ule_skb->data), MAX_ADDR_PRINTFMT_ARGS(dev->dev_addr)); 703#endif 704 dev_kfree_skb(priv->ule_skb); 705 goto sndu_done; 706 } 707 else 708 { 709 skb_copy_from_linear_data(priv->ule_skb, 710 dest_addr, 711 ETH_ALEN); 712 skb_pull(priv->ule_skb, ETH_ALEN); 713 } 714 } 715 716 /* Handle ULE Extension Headers. */ 717 if (priv->ule_sndu_type < ETH_P_802_3_MIN) { 718 /* There is an extension header. Handle it accordingly. */ 719 int l = handle_ule_extensions(priv); 720 if (l < 0) { 721 /* Mandatory extension header unknown or TEST SNDU. Drop it. */ 722 // printk( KERN_WARNING "Dropping SNDU, extension headers.\n" ); 723 dev_kfree_skb(priv->ule_skb); 724 goto sndu_done; 725 } 726 skb_pull(priv->ule_skb, l); 727 } 728 729 /* 730 * Construct/assure correct ethernet header. 731 * Note: in bridged mode (priv->ule_bridged != 732 * 0) we already have the (original) ethernet 733 * header at the start of the payload (after 734 * optional dest. address and any extension 735 * headers). 736 */ 737 738 if (!priv->ule_bridged) { 739 skb_push(priv->ule_skb, ETH_HLEN); 740 ethh = (struct ethhdr *)priv->ule_skb->data; 741 if (!priv->ule_dbit) { 742 /* dest_addr buffer is only valid if priv->ule_dbit == 0 */ 743 memcpy(ethh->h_dest, dest_addr, ETH_ALEN); 744 memset(ethh->h_source, 0, ETH_ALEN); 745 } 746 else /* zeroize source and dest */ 747 memset( ethh, 0, ETH_ALEN*2 ); 748 749 ethh->h_proto = htons(priv->ule_sndu_type); 750 } 751 /* else: skb is in correct state; nothing to do. */ 752 priv->ule_bridged = 0; 753 754 /* Stuff into kernel's protocol stack. */ 755 priv->ule_skb->protocol = dvb_net_eth_type_trans(priv->ule_skb, dev); 756 /* If D-bit is set (i.e. destination MAC address not present), 757 * receive the packet anyhow. */ 758 /* if (priv->ule_dbit && skb->pkt_type == PACKET_OTHERHOST) 759 priv->ule_skb->pkt_type = PACKET_HOST; */ 760 dev->stats.rx_packets++; 761 dev->stats.rx_bytes += priv->ule_skb->len; 762 netif_rx(priv->ule_skb); 763 } 764 sndu_done: 765 /* Prepare for next SNDU. */ 766 reset_ule(priv); 767 } 768 769 /* More data in current TS (look at the bytes following the CRC32)? */ 770 if (ts_remain >= 2 && *((unsigned short *)from_where) != 0xFFFF) { 771 /* Next ULE SNDU starts right there. */ 772 new_ts = 0; 773 priv->ule_skb = NULL; 774 priv->ule_sndu_type_1 = 0; 775 priv->ule_sndu_len = 0; 776 // printk(KERN_WARNING "More data in current TS: [%#x %#x %#x %#x]\n", 777 // *(from_where + 0), *(from_where + 1), 778 // *(from_where + 2), *(from_where + 3)); 779 // printk(KERN_WARNING "ts @ %p, stopped @ %p:\n", ts, from_where + 0); 780 // hexdump(ts, 188); 781 } else { 782 new_ts = 1; 783 ts += TS_SZ; 784 priv->ts_count++; 785 if (priv->ule_skb == NULL) { 786 priv->need_pusi = 1; 787 priv->ule_sndu_type_1 = 0; 788 priv->ule_sndu_len = 0; 789 } 790 } 791 } /* for all available TS cells */ 792} 793 794static int dvb_net_ts_callback(const u8 *buffer1, size_t buffer1_len, 795 const u8 *buffer2, size_t buffer2_len, 796 struct dmx_ts_feed *feed, enum dmx_success success) 797{ 798 struct net_device *dev = feed->priv; 799 800 if (buffer2) 801 printk(KERN_WARNING "buffer2 not NULL: %p.\n", buffer2); 802 if (buffer1_len > 32768) 803 printk(KERN_WARNING "length > 32k: %zu.\n", buffer1_len); 804 /* printk("TS callback: %u bytes, %u TS cells @ %p.\n", 805 buffer1_len, buffer1_len / TS_SZ, buffer1); */ 806 dvb_net_ule(dev, buffer1, buffer1_len); 807 return 0; 808} 809 810 811static void dvb_net_sec(struct net_device *dev, 812 const u8 *pkt, int pkt_len) 813{ 814 u8 *eth; 815 struct sk_buff *skb; 816 struct net_device_stats *stats = &dev->stats; 817 int snap = 0; 818 819 /* note: pkt_len includes a 32bit checksum */ 820 if (pkt_len < 16) { 821 printk("%s: IP/MPE packet length = %d too small.\n", 822 dev->name, pkt_len); 823 stats->rx_errors++; 824 stats->rx_length_errors++; 825 return; 826 } 827/* it seems some ISPs manage to screw up here, so we have to 828 * relax the error checks... */ 829#if 0 830 if ((pkt[5] & 0xfd) != 0xc1) { 831 /* drop scrambled or broken packets */ 832#else 833 if ((pkt[5] & 0x3c) != 0x00) { 834 /* drop scrambled */ 835#endif 836 stats->rx_errors++; 837 stats->rx_crc_errors++; 838 return; 839 } 840 if (pkt[5] & 0x02) { 841 /* handle LLC/SNAP, see rfc-1042 */ 842 if (pkt_len < 24 || memcmp(&pkt[12], "\xaa\xaa\x03\0\0\0", 6)) { 843 stats->rx_dropped++; 844 return; 845 } 846 snap = 8; 847 } 848 if (pkt[7]) { 849 /* FIXME: assemble datagram from multiple sections */ 850 stats->rx_errors++; 851 stats->rx_frame_errors++; 852 return; 853 } 854 855 /* we have 14 byte ethernet header (ip header follows); 856 * 12 byte MPE header; 4 byte checksum; + 2 byte alignment, 8 byte LLC/SNAP 857 */ 858 if (!(skb = dev_alloc_skb(pkt_len - 4 - 12 + 14 + 2 - snap))) { 859 //printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n", dev->name); 860 stats->rx_dropped++; 861 return; 862 } 863 skb_reserve(skb, 2); /* longword align L3 header */ 864 skb->dev = dev; 865 866 /* copy L3 payload */ 867 eth = (u8 *) skb_put(skb, pkt_len - 12 - 4 + 14 - snap); 868 memcpy(eth + 14, pkt + 12 + snap, pkt_len - 12 - 4 - snap); 869 870 /* create ethernet header: */ 871 eth[0]=pkt[0x0b]; 872 eth[1]=pkt[0x0a]; 873 eth[2]=pkt[0x09]; 874 eth[3]=pkt[0x08]; 875 eth[4]=pkt[0x04]; 876 eth[5]=pkt[0x03]; 877 878 eth[6]=eth[7]=eth[8]=eth[9]=eth[10]=eth[11]=0; 879 880 if (snap) { 881 eth[12] = pkt[18]; 882 eth[13] = pkt[19]; 883 } else { 884 /* protocol numbers are from rfc-1700 or 885 * http://www.iana.org/assignments/ethernet-numbers 886 */ 887 if (pkt[12] >> 4 == 6) { /* version field from IP header */ 888 eth[12] = 0x86; /* IPv6 */ 889 eth[13] = 0xdd; 890 } else { 891 eth[12] = 0x08; /* IPv4 */ 892 eth[13] = 0x00; 893 } 894 } 895 896 skb->protocol = dvb_net_eth_type_trans(skb, dev); 897 898 stats->rx_packets++; 899 stats->rx_bytes+=skb->len; 900 netif_rx(skb); 901} 902 903static int dvb_net_sec_callback(const u8 *buffer1, size_t buffer1_len, 904 const u8 *buffer2, size_t buffer2_len, 905 struct dmx_section_filter *filter, 906 enum dmx_success success) 907{ 908 struct net_device *dev = filter->priv; 909 910 /** 911 * we rely on the DVB API definition where exactly one complete 912 * section is delivered in buffer1 913 */ 914 dvb_net_sec (dev, buffer1, buffer1_len); 915 return 0; 916} 917 918static int dvb_net_tx(struct sk_buff *skb, struct net_device *dev) 919{ 920 dev_kfree_skb(skb); 921 return NETDEV_TX_OK; 922} 923 924static u8 mask_normal[6]={0xff, 0xff, 0xff, 0xff, 0xff, 0xff}; 925static u8 mask_allmulti[6]={0xff, 0xff, 0xff, 0x00, 0x00, 0x00}; 926static u8 mac_allmulti[6]={0x01, 0x00, 0x5e, 0x00, 0x00, 0x00}; 927static u8 mask_promisc[6]={0x00, 0x00, 0x00, 0x00, 0x00, 0x00}; 928 929static int dvb_net_filter_sec_set(struct net_device *dev, 930 struct dmx_section_filter **secfilter, 931 u8 *mac, u8 *mac_mask) 932{ 933 struct dvb_net_priv *priv = netdev_priv(dev); 934 int ret; 935 936 *secfilter=NULL; 937 ret = priv->secfeed->allocate_filter(priv->secfeed, secfilter); 938 if (ret<0) { 939 printk("%s: could not get filter\n", dev->name); 940 return ret; 941 } 942 943 (*secfilter)->priv=(void *) dev; 944 945 memset((*secfilter)->filter_value, 0x00, DMX_MAX_FILTER_SIZE); 946 memset((*secfilter)->filter_mask, 0x00, DMX_MAX_FILTER_SIZE); 947 memset((*secfilter)->filter_mode, 0xff, DMX_MAX_FILTER_SIZE); 948 949 (*secfilter)->filter_value[0]=0x3e; 950 (*secfilter)->filter_value[3]=mac[5]; 951 (*secfilter)->filter_value[4]=mac[4]; 952 (*secfilter)->filter_value[8]=mac[3]; 953 (*secfilter)->filter_value[9]=mac[2]; 954 (*secfilter)->filter_value[10]=mac[1]; 955 (*secfilter)->filter_value[11]=mac[0]; 956 957 (*secfilter)->filter_mask[0] = 0xff; 958 (*secfilter)->filter_mask[3] = mac_mask[5]; 959 (*secfilter)->filter_mask[4] = mac_mask[4]; 960 (*secfilter)->filter_mask[8] = mac_mask[3]; 961 (*secfilter)->filter_mask[9] = mac_mask[2]; 962 (*secfilter)->filter_mask[10] = mac_mask[1]; 963 (*secfilter)->filter_mask[11]=mac_mask[0]; 964 965 dprintk("%s: filter mac=%pM\n", dev->name, mac); 966 dprintk("%s: filter mask=%pM\n", dev->name, mac_mask); 967 968 return 0; 969} 970 971static int dvb_net_feed_start(struct net_device *dev) 972{ 973 int ret = 0, i; 974 struct dvb_net_priv *priv = netdev_priv(dev); 975 struct dmx_demux *demux = priv->demux; 976 unsigned char *mac = (unsigned char *) dev->dev_addr; 977 978 dprintk("%s: rx_mode %i\n", __func__, priv->rx_mode); 979 mutex_lock(&priv->mutex); 980 if (priv->tsfeed || priv->secfeed || priv->secfilter || priv->multi_secfilter[0]) 981 printk("%s: BUG %d\n", __func__, __LINE__); 982 983 priv->secfeed=NULL; 984 priv->secfilter=NULL; 985 priv->tsfeed = NULL; 986 987 if (priv->feedtype == DVB_NET_FEEDTYPE_MPE) { 988 dprintk("%s: alloc secfeed\n", __func__); 989 ret=demux->allocate_section_feed(demux, &priv->secfeed, 990 dvb_net_sec_callback); 991 if (ret<0) { 992 printk("%s: could not allocate section feed\n", dev->name); 993 goto error; 994 } 995 996 ret = priv->secfeed->set(priv->secfeed, priv->pid, 32768, 1); 997 998 if (ret<0) { 999 printk("%s: could not set section feed\n", dev->name); 1000 priv->demux->release_section_feed(priv->demux, priv->secfeed); 1001 priv->secfeed=NULL; 1002 goto error; 1003 } 1004 1005 if (priv->rx_mode != RX_MODE_PROMISC) { 1006 dprintk("%s: set secfilter\n", __func__); 1007 dvb_net_filter_sec_set(dev, &priv->secfilter, mac, mask_normal); 1008 } 1009 1010 switch (priv->rx_mode) { 1011 case RX_MODE_MULTI: 1012 for (i = 0; i < priv->multi_num; i++) { 1013 dprintk("%s: set multi_secfilter[%d]\n", __func__, i); 1014 dvb_net_filter_sec_set(dev, &priv->multi_secfilter[i], 1015 priv->multi_macs[i], mask_normal); 1016 } 1017 break; 1018 case RX_MODE_ALL_MULTI: 1019 priv->multi_num=1; 1020 dprintk("%s: set multi_secfilter[0]\n", __func__); 1021 dvb_net_filter_sec_set(dev, &priv->multi_secfilter[0], 1022 mac_allmulti, mask_allmulti); 1023 break; 1024 case RX_MODE_PROMISC: 1025 priv->multi_num=0; 1026 dprintk("%s: set secfilter\n", __func__); 1027 dvb_net_filter_sec_set(dev, &priv->secfilter, mac, mask_promisc); 1028 break; 1029 } 1030 1031 dprintk("%s: start filtering\n", __func__); 1032 priv->secfeed->start_filtering(priv->secfeed); 1033 } else if (priv->feedtype == DVB_NET_FEEDTYPE_ULE) { 1034 struct timespec timeout = { 0, 10000000 }; // 10 msec 1035 1036 /* we have payloads encapsulated in TS */ 1037 dprintk("%s: alloc tsfeed\n", __func__); 1038 ret = demux->allocate_ts_feed(demux, &priv->tsfeed, dvb_net_ts_callback); 1039 if (ret < 0) { 1040 printk("%s: could not allocate ts feed\n", dev->name); 1041 goto error; 1042 } 1043 1044 /* Set netdevice pointer for ts decaps callback. */ 1045 priv->tsfeed->priv = (void *)dev; 1046 ret = priv->tsfeed->set(priv->tsfeed, 1047 priv->pid, /* pid */ 1048 TS_PACKET, /* type */ 1049 DMX_PES_OTHER, /* pes type */ 1050 32768, /* circular buffer size */ 1051 timeout /* timeout */ 1052 ); 1053 1054 if (ret < 0) { 1055 printk("%s: could not set ts feed\n", dev->name); 1056 priv->demux->release_ts_feed(priv->demux, priv->tsfeed); 1057 priv->tsfeed = NULL; 1058 goto error; 1059 } 1060 1061 dprintk("%s: start filtering\n", __func__); 1062 priv->tsfeed->start_filtering(priv->tsfeed); 1063 } else 1064 ret = -EINVAL; 1065 1066error: 1067 mutex_unlock(&priv->mutex); 1068 return ret; 1069} 1070 1071static int dvb_net_feed_stop(struct net_device *dev) 1072{ 1073 struct dvb_net_priv *priv = netdev_priv(dev); 1074 int i, ret = 0; 1075 1076 dprintk("%s\n", __func__); 1077 mutex_lock(&priv->mutex); 1078 if (priv->feedtype == DVB_NET_FEEDTYPE_MPE) { 1079 if (priv->secfeed) { 1080 if (priv->secfeed->is_filtering) { 1081 dprintk("%s: stop secfeed\n", __func__); 1082 priv->secfeed->stop_filtering(priv->secfeed); 1083 } 1084 1085 if (priv->secfilter) { 1086 dprintk("%s: release secfilter\n", __func__); 1087 priv->secfeed->release_filter(priv->secfeed, 1088 priv->secfilter); 1089 priv->secfilter=NULL; 1090 } 1091 1092 for (i=0; i<priv->multi_num; i++) { 1093 if (priv->multi_secfilter[i]) { 1094 dprintk("%s: release multi_filter[%d]\n", 1095 __func__, i); 1096 priv->secfeed->release_filter(priv->secfeed, 1097 priv->multi_secfilter[i]); 1098 priv->multi_secfilter[i] = NULL; 1099 } 1100 } 1101 1102 priv->demux->release_section_feed(priv->demux, priv->secfeed); 1103 priv->secfeed = NULL; 1104 } else 1105 printk("%s: no feed to stop\n", dev->name); 1106 } else if (priv->feedtype == DVB_NET_FEEDTYPE_ULE) { 1107 if (priv->tsfeed) { 1108 if (priv->tsfeed->is_filtering) { 1109 dprintk("%s: stop tsfeed\n", __func__); 1110 priv->tsfeed->stop_filtering(priv->tsfeed); 1111 } 1112 priv->demux->release_ts_feed(priv->demux, priv->tsfeed); 1113 priv->tsfeed = NULL; 1114 } 1115 else 1116 printk("%s: no ts feed to stop\n", dev->name); 1117 } else 1118 ret = -EINVAL; 1119 mutex_unlock(&priv->mutex); 1120 return ret; 1121} 1122 1123 1124static int dvb_set_mc_filter(struct net_device *dev, unsigned char *addr) 1125{ 1126 struct dvb_net_priv *priv = netdev_priv(dev); 1127 1128 if (priv->multi_num == DVB_NET_MULTICAST_MAX) 1129 return -ENOMEM; 1130 1131 memcpy(priv->multi_macs[priv->multi_num], addr, ETH_ALEN); 1132 1133 priv->multi_num++; 1134 return 0; 1135} 1136 1137 1138static void wq_set_multicast_list (struct work_struct *work) 1139{ 1140 struct dvb_net_priv *priv = 1141 container_of(work, struct dvb_net_priv, set_multicast_list_wq); 1142 struct net_device *dev = priv->net; 1143 1144 dvb_net_feed_stop(dev); 1145 priv->rx_mode = RX_MODE_UNI; 1146 netif_addr_lock_bh(dev); 1147 1148 if (dev->flags & IFF_PROMISC) { 1149 dprintk("%s: promiscuous mode\n", dev->name); 1150 priv->rx_mode = RX_MODE_PROMISC; 1151 } else if ((dev->flags & IFF_ALLMULTI)) { 1152 dprintk("%s: allmulti mode\n", dev->name); 1153 priv->rx_mode = RX_MODE_ALL_MULTI; 1154 } else if (!netdev_mc_empty(dev)) { 1155 struct netdev_hw_addr *ha; 1156 1157 dprintk("%s: set_mc_list, %d entries\n", 1158 dev->name, netdev_mc_count(dev)); 1159 1160 priv->rx_mode = RX_MODE_MULTI; 1161 priv->multi_num = 0; 1162 1163 netdev_for_each_mc_addr(ha, dev) 1164 dvb_set_mc_filter(dev, ha->addr); 1165 } 1166 1167 netif_addr_unlock_bh(dev); 1168 dvb_net_feed_start(dev); 1169} 1170 1171 1172static void dvb_net_set_multicast_list (struct net_device *dev) 1173{ 1174 struct dvb_net_priv *priv = netdev_priv(dev); 1175 schedule_work(&priv->set_multicast_list_wq); 1176} 1177 1178 1179static void wq_restart_net_feed (struct work_struct *work) 1180{ 1181 struct dvb_net_priv *priv = 1182 container_of(work, struct dvb_net_priv, restart_net_feed_wq); 1183 struct net_device *dev = priv->net; 1184 1185 if (netif_running(dev)) { 1186 dvb_net_feed_stop(dev); 1187 dvb_net_feed_start(dev); 1188 } 1189} 1190 1191 1192static int dvb_net_set_mac (struct net_device *dev, void *p) 1193{ 1194 struct dvb_net_priv *priv = netdev_priv(dev); 1195 struct sockaddr *addr=p; 1196 1197 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len); 1198 1199 if (netif_running(dev)) 1200 schedule_work(&priv->restart_net_feed_wq); 1201 1202 return 0; 1203} 1204 1205 1206static int dvb_net_open(struct net_device *dev) 1207{ 1208 struct dvb_net_priv *priv = netdev_priv(dev); 1209 1210 priv->in_use++; 1211 dvb_net_feed_start(dev); 1212 return 0; 1213} 1214 1215 1216static int dvb_net_stop(struct net_device *dev) 1217{ 1218 struct dvb_net_priv *priv = netdev_priv(dev); 1219 1220 priv->in_use--; 1221 return dvb_net_feed_stop(dev); 1222} 1223 1224static const struct header_ops dvb_header_ops = { 1225 .create = eth_header, 1226 .parse = eth_header_parse, 1227 .rebuild = eth_rebuild_header, 1228}; 1229 1230 1231static const struct net_device_ops dvb_netdev_ops = { 1232 .ndo_open = dvb_net_open, 1233 .ndo_stop = dvb_net_stop, 1234 .ndo_start_xmit = dvb_net_tx, 1235 .ndo_set_rx_mode = dvb_net_set_multicast_list, 1236 .ndo_set_mac_address = dvb_net_set_mac, 1237 .ndo_change_mtu = eth_change_mtu, 1238 .ndo_validate_addr = eth_validate_addr, 1239}; 1240 1241static void dvb_net_setup(struct net_device *dev) 1242{ 1243 ether_setup(dev); 1244 1245 dev->header_ops = &dvb_header_ops; 1246 dev->netdev_ops = &dvb_netdev_ops; 1247 dev->mtu = 4096; 1248 1249 dev->flags |= IFF_NOARP; 1250} 1251 1252static int get_if(struct dvb_net *dvbnet) 1253{ 1254 int i; 1255 1256 for (i=0; i<DVB_NET_DEVICES_MAX; i++) 1257 if (!dvbnet->state[i]) 1258 break; 1259 1260 if (i == DVB_NET_DEVICES_MAX) 1261 return -1; 1262 1263 dvbnet->state[i]=1; 1264 return i; 1265} 1266 1267static int dvb_net_add_if(struct dvb_net *dvbnet, u16 pid, u8 feedtype) 1268{ 1269 struct net_device *net; 1270 struct dvb_net_priv *priv; 1271 int result; 1272 int if_num; 1273 1274 if (feedtype != DVB_NET_FEEDTYPE_MPE && feedtype != DVB_NET_FEEDTYPE_ULE) 1275 return -EINVAL; 1276 if ((if_num = get_if(dvbnet)) < 0) 1277 return -EINVAL; 1278 1279 net = alloc_netdev(sizeof(struct dvb_net_priv), "dvb", 1280 NET_NAME_UNKNOWN, dvb_net_setup); 1281 if (!net) 1282 return -ENOMEM; 1283 1284 if (dvbnet->dvbdev->id) 1285 snprintf(net->name, IFNAMSIZ, "dvb%d%u%d", 1286 dvbnet->dvbdev->adapter->num, dvbnet->dvbdev->id, if_num); 1287 else 1288 /* compatibility fix to keep dvb0_0 format */ 1289 snprintf(net->name, IFNAMSIZ, "dvb%d_%d", 1290 dvbnet->dvbdev->adapter->num, if_num); 1291 1292 net->addr_len = 6; 1293 memcpy(net->dev_addr, dvbnet->dvbdev->adapter->proposed_mac, 6); 1294 1295 dvbnet->device[if_num] = net; 1296 1297 priv = netdev_priv(net); 1298 priv->net = net; 1299 priv->demux = dvbnet->demux; 1300 priv->pid = pid; 1301 priv->rx_mode = RX_MODE_UNI; 1302 priv->need_pusi = 1; 1303 priv->tscc = 0; 1304 priv->feedtype = feedtype; 1305 reset_ule(priv); 1306 1307 INIT_WORK(&priv->set_multicast_list_wq, wq_set_multicast_list); 1308 INIT_WORK(&priv->restart_net_feed_wq, wq_restart_net_feed); 1309 mutex_init(&priv->mutex); 1310 1311 net->base_addr = pid; 1312 1313 if ((result = register_netdev(net)) < 0) { 1314 dvbnet->device[if_num] = NULL; 1315 free_netdev(net); 1316 return result; 1317 } 1318 printk("dvb_net: created network interface %s\n", net->name); 1319 1320 return if_num; 1321} 1322 1323static int dvb_net_remove_if(struct dvb_net *dvbnet, unsigned long num) 1324{ 1325 struct net_device *net = dvbnet->device[num]; 1326 struct dvb_net_priv *priv; 1327 1328 if (!dvbnet->state[num]) 1329 return -EINVAL; 1330 priv = netdev_priv(net); 1331 if (priv->in_use) 1332 return -EBUSY; 1333 1334 dvb_net_stop(net); 1335 flush_work(&priv->set_multicast_list_wq); 1336 flush_work(&priv->restart_net_feed_wq); 1337 printk("dvb_net: removed network interface %s\n", net->name); 1338 unregister_netdev(net); 1339 dvbnet->state[num]=0; 1340 dvbnet->device[num] = NULL; 1341 free_netdev(net); 1342 1343 return 0; 1344} 1345 1346static int dvb_net_do_ioctl(struct file *file, 1347 unsigned int cmd, void *parg) 1348{ 1349 struct dvb_device *dvbdev = file->private_data; 1350 struct dvb_net *dvbnet = dvbdev->priv; 1351 int ret = 0; 1352 1353 if (((file->f_flags&O_ACCMODE)==O_RDONLY)) 1354 return -EPERM; 1355 1356 if (mutex_lock_interruptible(&dvbnet->ioctl_mutex)) 1357 return -ERESTARTSYS; 1358 1359 switch (cmd) { 1360 case NET_ADD_IF: 1361 { 1362 struct dvb_net_if *dvbnetif = parg; 1363 int result; 1364 1365 if (!capable(CAP_SYS_ADMIN)) { 1366 ret = -EPERM; 1367 goto ioctl_error; 1368 } 1369 1370 if (!try_module_get(dvbdev->adapter->module)) { 1371 ret = -EPERM; 1372 goto ioctl_error; 1373 } 1374 1375 result=dvb_net_add_if(dvbnet, dvbnetif->pid, dvbnetif->feedtype); 1376 if (result<0) { 1377 module_put(dvbdev->adapter->module); 1378 ret = result; 1379 goto ioctl_error; 1380 } 1381 dvbnetif->if_num=result; 1382 break; 1383 } 1384 case NET_GET_IF: 1385 { 1386 struct net_device *netdev; 1387 struct dvb_net_priv *priv_data; 1388 struct dvb_net_if *dvbnetif = parg; 1389 1390 if (dvbnetif->if_num >= DVB_NET_DEVICES_MAX || 1391 !dvbnet->state[dvbnetif->if_num]) { 1392 ret = -EINVAL; 1393 goto ioctl_error; 1394 } 1395 1396 netdev = dvbnet->device[dvbnetif->if_num]; 1397 1398 priv_data = netdev_priv(netdev); 1399 dvbnetif->pid=priv_data->pid; 1400 dvbnetif->feedtype=priv_data->feedtype; 1401 break; 1402 } 1403 case NET_REMOVE_IF: 1404 { 1405 if (!capable(CAP_SYS_ADMIN)) { 1406 ret = -EPERM; 1407 goto ioctl_error; 1408 } 1409 if ((unsigned long) parg >= DVB_NET_DEVICES_MAX) { 1410 ret = -EINVAL; 1411 goto ioctl_error; 1412 } 1413 ret = dvb_net_remove_if(dvbnet, (unsigned long) parg); 1414 if (!ret) 1415 module_put(dvbdev->adapter->module); 1416 break; 1417 } 1418 1419 /* binary compatibility cruft */ 1420 case __NET_ADD_IF_OLD: 1421 { 1422 struct __dvb_net_if_old *dvbnetif = parg; 1423 int result; 1424 1425 if (!capable(CAP_SYS_ADMIN)) { 1426 ret = -EPERM; 1427 goto ioctl_error; 1428 } 1429 1430 if (!try_module_get(dvbdev->adapter->module)) { 1431 ret = -EPERM; 1432 goto ioctl_error; 1433 } 1434 1435 result=dvb_net_add_if(dvbnet, dvbnetif->pid, DVB_NET_FEEDTYPE_MPE); 1436 if (result<0) { 1437 module_put(dvbdev->adapter->module); 1438 ret = result; 1439 goto ioctl_error; 1440 } 1441 dvbnetif->if_num=result; 1442 break; 1443 } 1444 case __NET_GET_IF_OLD: 1445 { 1446 struct net_device *netdev; 1447 struct dvb_net_priv *priv_data; 1448 struct __dvb_net_if_old *dvbnetif = parg; 1449 1450 if (dvbnetif->if_num >= DVB_NET_DEVICES_MAX || 1451 !dvbnet->state[dvbnetif->if_num]) { 1452 ret = -EINVAL; 1453 goto ioctl_error; 1454 } 1455 1456 netdev = dvbnet->device[dvbnetif->if_num]; 1457 1458 priv_data = netdev_priv(netdev); 1459 dvbnetif->pid=priv_data->pid; 1460 break; 1461 } 1462 default: 1463 ret = -ENOTTY; 1464 break; 1465 } 1466 1467ioctl_error: 1468 mutex_unlock(&dvbnet->ioctl_mutex); 1469 return ret; 1470} 1471 1472static long dvb_net_ioctl(struct file *file, 1473 unsigned int cmd, unsigned long arg) 1474{ 1475 return dvb_usercopy(file, cmd, arg, dvb_net_do_ioctl); 1476} 1477 1478static int dvb_net_close(struct inode *inode, struct file *file) 1479{ 1480 struct dvb_device *dvbdev = file->private_data; 1481 struct dvb_net *dvbnet = dvbdev->priv; 1482 1483 dvb_generic_release(inode, file); 1484 1485 if(dvbdev->users == 1 && dvbnet->exit == 1) 1486 wake_up(&dvbdev->wait_queue); 1487 return 0; 1488} 1489 1490 1491static const struct file_operations dvb_net_fops = { 1492 .owner = THIS_MODULE, 1493 .unlocked_ioctl = dvb_net_ioctl, 1494 .open = dvb_generic_open, 1495 .release = dvb_net_close, 1496 .llseek = noop_llseek, 1497}; 1498 1499static struct dvb_device dvbdev_net = { 1500 .priv = NULL, 1501 .users = 1, 1502 .writers = 1, 1503 .fops = &dvb_net_fops, 1504}; 1505 1506 1507void dvb_net_release (struct dvb_net *dvbnet) 1508{ 1509 int i; 1510 1511 dvbnet->exit = 1; 1512 if (dvbnet->dvbdev->users < 1) 1513 wait_event(dvbnet->dvbdev->wait_queue, 1514 dvbnet->dvbdev->users==1); 1515 1516 dvb_unregister_device(dvbnet->dvbdev); 1517 1518 for (i=0; i<DVB_NET_DEVICES_MAX; i++) { 1519 if (!dvbnet->state[i]) 1520 continue; 1521 dvb_net_remove_if(dvbnet, i); 1522 } 1523} 1524EXPORT_SYMBOL(dvb_net_release); 1525 1526 1527int dvb_net_init (struct dvb_adapter *adap, struct dvb_net *dvbnet, 1528 struct dmx_demux *dmx) 1529{ 1530 int i; 1531 1532 mutex_init(&dvbnet->ioctl_mutex); 1533 dvbnet->demux = dmx; 1534 1535 for (i=0; i<DVB_NET_DEVICES_MAX; i++) 1536 dvbnet->state[i] = 0; 1537 1538 return dvb_register_device(adap, &dvbnet->dvbdev, &dvbdev_net, 1539 dvbnet, DVB_DEVICE_NET); 1540} 1541EXPORT_SYMBOL(dvb_net_init); 1542