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#include <linux/module.h> 52#include <linux/kernel.h> 53#include <linux/netdevice.h> 54#include <linux/etherdevice.h> 55#include <linux/dvb/net.h> 56#include <linux/uio.h> 57#include <asm/uaccess.h> 58#include <linux/crc32.h> 59#include <linux/mutex.h> 60 61#include "dvb_demux.h" 62#include "dvb_net.h" 63 64static int dvb_net_debug; 65module_param(dvb_net_debug, int, 0444); 66MODULE_PARM_DESC(dvb_net_debug, "enable debug messages"); 67 68#define dprintk(x...) do { if (dvb_net_debug) printk(x); } while (0) 69 70 71static 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#define MAC_ADDR_PRINTFMT "%.2x:%.2x:%.2x:%.2x:%.2x:%.2x" 87#define MAX_ADDR_PRINTFMT_ARGS(macap) (macap)[0],(macap)[1],(macap)[2],(macap)[3],(macap)[4],(macap)[5] 88 89#define isprint(c) ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || (c >= '0' && c <= '9')) 90 91static void hexdump( const unsigned char *buf, unsigned short len ) 92{ 93 char str[80], octet[10]; 94 int ofs, i, l; 95 96 for (ofs = 0; ofs < len; ofs += 16) { 97 sprintf( str, "%03d: ", ofs ); 98 99 for (i = 0; i < 16; i++) { 100 if ((i + ofs) < len) 101 sprintf( octet, "%02x ", buf[ofs + i] ); 102 else 103 strcpy( octet, " " ); 104 105 strcat( str, octet ); 106 } 107 strcat( str, " " ); 108 l = strlen( str ); 109 110 for (i = 0; (i < 16) && ((i + ofs) < len); i++) 111 str[l++] = isprint( buf[ofs + i] ) ? buf[ofs + i] : '.'; 112 113 str[l] = '\0'; 114 printk( KERN_WARNING "%s\n", str ); 115 } 116} 117 118#endif 119 120struct dvb_net_priv { 121 int in_use; 122 struct net_device_stats stats; 123 u16 pid; 124 struct net_device *net; 125 struct dvb_net *host; 126 struct dmx_demux *demux; 127 struct dmx_section_feed *secfeed; 128 struct dmx_section_filter *secfilter; 129 struct dmx_ts_feed *tsfeed; 130 int multi_num; 131 struct dmx_section_filter *multi_secfilter[DVB_NET_MULTICAST_MAX]; 132 unsigned char multi_macs[DVB_NET_MULTICAST_MAX][6]; 133 int rx_mode; 134#define RX_MODE_UNI 0 135#define RX_MODE_MULTI 1 136#define RX_MODE_ALL_MULTI 2 137#define RX_MODE_PROMISC 3 138 struct work_struct set_multicast_list_wq; 139 struct work_struct restart_net_feed_wq; 140 unsigned char feedtype; /* Either FEED_TYPE_ or FEED_TYPE_ULE */ 141 int need_pusi; /* Set to 1, if synchronization on PUSI required. */ 142 unsigned char tscc; /* TS continuity counter after sync on PUSI. */ 143 struct sk_buff *ule_skb; /* ULE SNDU decodes into this buffer. */ 144 unsigned char *ule_next_hdr; /* Pointer into skb to next ULE extension header. */ 145 unsigned short ule_sndu_len; /* ULE SNDU length in bytes, w/o D-Bit. */ 146 unsigned short ule_sndu_type; /* ULE SNDU type field, complete. */ 147 unsigned char ule_sndu_type_1; /* ULE SNDU type field, if split across 2 TS cells. */ 148 unsigned char ule_dbit; /* Whether the DestMAC address present 149 * or not (bit is set). */ 150 unsigned char ule_bridged; /* Whether the ULE_BRIDGED extension header was found. */ 151 int ule_sndu_remain; /* Nr. of bytes still required for current ULE SNDU. */ 152 unsigned long ts_count; /* Current ts cell counter. */ 153 struct mutex mutex; 154}; 155 156 157/** 158 * Determine the packet's protocol ID. The rule here is that we 159 * assume 802.3 if the type field is short enough to be a length. 160 * This is normal practice and works for any 'now in use' protocol. 161 * 162 * stolen from eth.c out of the linux kernel, hacked for dvb-device 163 * by Michael Holzt <kju@debian.org> 164 */ 165static unsigned short dvb_net_eth_type_trans(struct sk_buff *skb, 166 struct net_device *dev) 167{ 168 struct ethhdr *eth; 169 unsigned char *rawp; 170 171 skb_reset_mac_header(skb); 172 skb_pull(skb,dev->hard_header_len); 173 eth = eth_hdr(skb); 174 175 if (*eth->h_dest & 1) { 176 if(memcmp(eth->h_dest,dev->broadcast, ETH_ALEN)==0) 177 skb->pkt_type=PACKET_BROADCAST; 178 else 179 skb->pkt_type=PACKET_MULTICAST; 180 } 181 182 if (ntohs(eth->h_proto) >= 1536) 183 return eth->h_proto; 184 185 rawp = skb->data; 186 187 /** 188 * This is a magic hack to spot IPX packets. Older Novell breaks 189 * the protocol design and runs IPX over 802.3 without an 802.2 LLC 190 * layer. We look for FFFF which isn't a used 802.2 SSAP/DSAP. This 191 * won't work for fault tolerant netware but does for the rest. 192 */ 193 if (*(unsigned short *)rawp == 0xFFFF) 194 return htons(ETH_P_802_3); 195 196 /** 197 * Real 802.2 LLC 198 */ 199 return htons(ETH_P_802_2); 200} 201 202#define TS_SZ 188 203#define TS_SYNC 0x47 204#define TS_TEI 0x80 205#define TS_SC 0xC0 206#define TS_PUSI 0x40 207#define TS_AF_A 0x20 208#define TS_AF_D 0x10 209 210/* ULE Extension Header handlers. */ 211 212#define ULE_TEST 0 213#define ULE_BRIDGED 1 214 215#define ULE_OPTEXTHDR_PADDING 0 216 217static int ule_test_sndu( struct dvb_net_priv *p ) 218{ 219 return -1; 220} 221 222static int ule_bridged_sndu( struct dvb_net_priv *p ) 223{ 224 struct ethhdr *hdr = (struct ethhdr*) p->ule_next_hdr; 225 if(ntohs(hdr->h_proto) < 1536) { 226 int framelen = p->ule_sndu_len - ((p->ule_next_hdr+sizeof(struct ethhdr)) - p->ule_skb->data); 227 /* A frame Type < 1536 for a bridged frame, introduces a LLC Length field. */ 228 if(framelen != ntohs(hdr->h_proto)) { 229 return -1; 230 } 231 } 232 /* Note: 233 * From RFC4326: 234 * "A bridged SNDU is a Mandatory Extension Header of Type 1. 235 * It must be the final (or only) extension header specified in the header chain of a SNDU." 236 * The 'ule_bridged' flag will cause the extension header processing loop to terminate. 237 */ 238 p->ule_bridged = 1; 239 return 0; 240} 241 242static int ule_exthdr_padding(struct dvb_net_priv *p) 243{ 244 return 0; 245} 246 247/** Handle ULE extension headers. 248 * Function is called after a successful CRC32 verification of an ULE SNDU to complete its decoding. 249 * Returns: >= 0: nr. of bytes consumed by next extension header 250 * -1: Mandatory extension header that is not recognized or TEST SNDU; discard. 251 */ 252static int handle_one_ule_extension( struct dvb_net_priv *p ) 253{ 254 /* Table of mandatory extension header handlers. The header type is the index. */ 255 static int (*ule_mandatory_ext_handlers[255])( struct dvb_net_priv *p ) = 256 { [0] = ule_test_sndu, [1] = ule_bridged_sndu, [2] = NULL, }; 257 258 /* Table of optional extension header handlers. The header type is the index. */ 259 static int (*ule_optional_ext_handlers[255])( struct dvb_net_priv *p ) = 260 { [0] = ule_exthdr_padding, [1] = NULL, }; 261 262 int ext_len = 0; 263 unsigned char hlen = (p->ule_sndu_type & 0x0700) >> 8; 264 unsigned char htype = p->ule_sndu_type & 0x00FF; 265 266 /* Discriminate mandatory and optional extension headers. */ 267 if (hlen == 0) { 268 /* Mandatory extension header */ 269 if (ule_mandatory_ext_handlers[htype]) { 270 ext_len = ule_mandatory_ext_handlers[htype]( p ); 271 if(ext_len >= 0) { 272 p->ule_next_hdr += ext_len; 273 if (!p->ule_bridged) { 274 p->ule_sndu_type = ntohs(*(unsigned short *)p->ule_next_hdr); 275 p->ule_next_hdr += 2; 276 } else { 277 p->ule_sndu_type = ntohs(*(unsigned short *)(p->ule_next_hdr + ((p->ule_dbit ? 2 : 3) * ETH_ALEN))); 278 /* This assures the extension handling loop will terminate. */ 279 } 280 } 281 // else: extension handler failed or SNDU should be discarded 282 } else 283 ext_len = -1; /* SNDU has to be discarded. */ 284 } else { 285 /* Optional extension header. Calculate the length. */ 286 ext_len = hlen << 1; 287 /* Process the optional extension header according to its type. */ 288 if (ule_optional_ext_handlers[htype]) 289 (void)ule_optional_ext_handlers[htype]( p ); 290 p->ule_next_hdr += ext_len; 291 p->ule_sndu_type = ntohs( *(unsigned short *)(p->ule_next_hdr-2) ); 292 /* 293 * note: the length of the next header type is included in the 294 * length of THIS optional extension header 295 */ 296 } 297 298 return ext_len; 299} 300 301static int handle_ule_extensions( struct dvb_net_priv *p ) 302{ 303 int total_ext_len = 0, l; 304 305 p->ule_next_hdr = p->ule_skb->data; 306 do { 307 l = handle_one_ule_extension( p ); 308 if (l < 0) 309 return l; /* Stop extension header processing and discard SNDU. */ 310 total_ext_len += l; 311#ifdef ULE_DEBUG 312 dprintk("handle_ule_extensions: ule_next_hdr=%p, ule_sndu_type=%i, " 313 "l=%i, total_ext_len=%i\n", p->ule_next_hdr, 314 (int) p->ule_sndu_type, l, total_ext_len); 315#endif 316 317 } while (p->ule_sndu_type < 1536); 318 319 return total_ext_len; 320} 321 322 323/** Prepare for a new ULE SNDU: reset the decoder state. */ 324static inline void reset_ule( struct dvb_net_priv *p ) 325{ 326 p->ule_skb = NULL; 327 p->ule_next_hdr = NULL; 328 p->ule_sndu_len = 0; 329 p->ule_sndu_type = 0; 330 p->ule_sndu_type_1 = 0; 331 p->ule_sndu_remain = 0; 332 p->ule_dbit = 0xFF; 333 p->ule_bridged = 0; 334} 335 336/** 337 * Decode ULE SNDUs according to draft-ietf-ipdvb-ule-03.txt from a sequence of 338 * TS cells of a single PID. 339 */ 340static void dvb_net_ule( struct net_device *dev, const u8 *buf, size_t buf_len ) 341{ 342 struct dvb_net_priv *priv = dev->priv; 343 unsigned long skipped = 0L; 344 u8 *ts, *ts_end, *from_where = NULL, ts_remain = 0, how_much = 0, new_ts = 1; 345 struct ethhdr *ethh = NULL; 346 347#ifdef ULE_DEBUG 348 /* The code inside ULE_DEBUG keeps a history of the last 100 TS cells processed. */ 349 static unsigned char ule_hist[100*TS_SZ]; 350 static unsigned char *ule_where = ule_hist, ule_dump = 0; 351#endif 352 353 if (dev == NULL) { 354 printk( KERN_ERR "NO netdev struct!\n" ); 355 return; 356 } 357 358 /* For all TS cells in current buffer. 359 * Appearently, we are called for every single TS cell. 360 */ 361 for (ts = (char *)buf, ts_end = (char *)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], ts[1] & TS_TEI >> 7, ts[3] & 0xC0 >> 6); 380 381 /* Drop partly decoded SNDU, reset state, resync on PUSI. */ 382 if (priv->ule_skb) { 383 dev_kfree_skb( priv->ule_skb ); 384 /* Prepare for next SNDU. */ 385 priv->stats.rx_errors++; 386 priv->stats.rx_frame_errors++; 387 } 388 reset_ule(priv); 389 priv->need_pusi = 1; 390 391 /* Continue with next TS cell. */ 392 ts += TS_SZ; 393 priv->ts_count++; 394 continue; 395 } 396 397 ts_remain = 184; 398 from_where = ts + 4; 399 } 400 /* Synchronize on PUSI, if required. */ 401 if (priv->need_pusi) { 402 if (ts[1] & TS_PUSI) { 403 /* Find beginning of first ULE SNDU in current TS cell. */ 404 /* Synchronize continuity counter. */ 405 priv->tscc = ts[3] & 0x0F; 406 /* There is a pointer field here. */ 407 if (ts[4] > ts_remain) { 408 printk(KERN_ERR "%lu: Invalid ULE packet " 409 "(pointer field %d)\n", priv->ts_count, ts[4]); 410 ts += TS_SZ; 411 priv->ts_count++; 412 continue; 413 } 414 /* Skip to destination of pointer field. */ 415 from_where = &ts[5] + ts[4]; 416 ts_remain -= 1 + ts[4]; 417 skipped = 0; 418 } else { 419 skipped++; 420 ts += TS_SZ; 421 priv->ts_count++; 422 continue; 423 } 424 } 425 426 if (new_ts) { 427 /* Check continuity counter. */ 428 if ((ts[3] & 0x0F) == priv->tscc) 429 priv->tscc = (priv->tscc + 1) & 0x0F; 430 else { 431 /* TS discontinuity handling: */ 432 printk(KERN_WARNING "%lu: TS discontinuity: got %#x, " 433 "expected %#x.\n", priv->ts_count, ts[3] & 0x0F, priv->tscc); 434 /* Drop partly decoded SNDU, reset state, resync on PUSI. */ 435 if (priv->ule_skb) { 436 dev_kfree_skb( priv->ule_skb ); 437 /* Prepare for next SNDU. */ 438 // reset_ule(priv); moved to below. 439 priv->stats.rx_errors++; 440 priv->stats.rx_frame_errors++; 441 } 442 reset_ule(priv); 443 /* skip to next PUSI. */ 444 priv->need_pusi = 1; 445 continue; 446 } 447 /* If we still have an incomplete payload, but PUSI is 448 * set; some TS cells are missing. 449 * This is only possible here, if we missed exactly 16 TS 450 * cells (continuity counter wrap). */ 451 if (ts[1] & TS_PUSI) { 452 if (! priv->need_pusi) { 453 if (!(*from_where < (ts_remain-1)) || *from_where != priv->ule_sndu_remain) { 454 /* Pointer field is invalid. Drop this TS cell and any started ULE SNDU. */ 455 printk(KERN_WARNING "%lu: Invalid pointer " 456 "field: %u.\n", priv->ts_count, *from_where); 457 458 /* Drop partly decoded SNDU, reset state, resync on PUSI. */ 459 if (priv->ule_skb) { 460 dev_kfree_skb( priv->ule_skb ); 461 ((struct dvb_net_priv *) dev->priv)->stats.rx_errors++; 462 ((struct dvb_net_priv *) dev->priv)->stats.rx_frame_errors++; 463 } 464 reset_ule(priv); 465 priv->need_pusi = 1; 466 continue; 467 } 468 /* Skip pointer field (we're processing a 469 * packed payload). */ 470 from_where += 1; 471 ts_remain -= 1; 472 } else 473 priv->need_pusi = 0; 474 475 if (priv->ule_sndu_remain > 183) { 476 /* Current SNDU lacks more data than there could be available in the 477 * current TS cell. */ 478 priv->stats.rx_errors++; 479 priv->stats.rx_length_errors++; 480 printk(KERN_WARNING "%lu: Expected %d more SNDU bytes, but " 481 "got PUSI (pf %d, ts_remain %d). Flushing incomplete payload.\n", 482 priv->ts_count, priv->ule_sndu_remain, ts[4], ts_remain); 483 dev_kfree_skb(priv->ule_skb); 484 /* Prepare for next SNDU. */ 485 reset_ule(priv); 486 /* Resync: go to where pointer field points to: start of next ULE SNDU. */ 487 from_where += ts[4]; 488 ts_remain -= ts[4]; 489 } 490 } 491 } 492 493 /* Check if new payload needs to be started. */ 494 if (priv->ule_skb == NULL) { 495 /* Start a new payload with skb. 496 * Find ULE header. It is only guaranteed that the 497 * length field (2 bytes) is contained in the current 498 * TS. 499 * Check ts_remain has to be >= 2 here. */ 500 if (ts_remain < 2) { 501 printk(KERN_WARNING "Invalid payload packing: only %d " 502 "bytes left in TS. Resyncing.\n", ts_remain); 503 priv->ule_sndu_len = 0; 504 priv->need_pusi = 1; 505 continue; 506 } 507 508 if (! priv->ule_sndu_len) { 509 /* Got at least two bytes, thus extrace the SNDU length. */ 510 priv->ule_sndu_len = from_where[0] << 8 | from_where[1]; 511 if (priv->ule_sndu_len & 0x8000) { 512 /* D-Bit is set: no dest mac present. */ 513 priv->ule_sndu_len &= 0x7FFF; 514 priv->ule_dbit = 1; 515 } else 516 priv->ule_dbit = 0; 517 518 if (priv->ule_sndu_len < 5) { 519 printk(KERN_WARNING "%lu: Invalid ULE SNDU length %u. " 520 "Resyncing.\n", priv->ts_count, priv->ule_sndu_len); 521 priv->stats.rx_errors++; 522 priv->stats.rx_length_errors++; 523 priv->ule_sndu_len = 0; 524 priv->need_pusi = 1; 525 new_ts = 1; 526 ts += TS_SZ; 527 priv->ts_count++; 528 continue; 529 } 530 ts_remain -= 2; /* consume the 2 bytes SNDU length. */ 531 from_where += 2; 532 } 533 534 /* 535 * State of current TS: 536 * ts_remain (remaining bytes in the current TS cell) 537 * 0 ule_type is not available now, we need the next TS cell 538 * 1 the first byte of the ule_type is present 539 * >=2 full ULE header present, maybe some payload data as well. 540 */ 541 switch (ts_remain) { 542 case 1: 543 priv->ule_sndu_type = from_where[0] << 8; 544 priv->ule_sndu_type_1 = 1; /* first byte of ule_type is set. */ 545 ts_remain -= 1; from_where += 1; 546 /* Continue w/ next TS. */ 547 case 0: 548 new_ts = 1; 549 ts += TS_SZ; 550 priv->ts_count++; 551 continue; 552 553 default: /* complete ULE header is present in current TS. */ 554 /* Extract ULE type field. */ 555 if (priv->ule_sndu_type_1) { 556 priv->ule_sndu_type |= from_where[0]; 557 from_where += 1; /* points to payload start. */ 558 ts_remain -= 1; 559 } else { 560 /* Complete type is present in new TS. */ 561 priv->ule_sndu_type = from_where[0] << 8 | from_where[1]; 562 from_where += 2; /* points to payload start. */ 563 ts_remain -= 2; 564 } 565 break; 566 } 567 568 /* Allocate the skb (decoder target buffer) with the correct size, as follows: 569 * prepare for the largest case: bridged SNDU with MAC address (dbit = 0). */ 570 priv->ule_skb = dev_alloc_skb( priv->ule_sndu_len + ETH_HLEN + ETH_ALEN ); 571 if (priv->ule_skb == NULL) { 572 printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n", 573 dev->name); 574 ((struct dvb_net_priv *)dev->priv)->stats.rx_dropped++; 575 return; 576 } 577 578 /* This includes the CRC32 _and_ dest mac, if !dbit. */ 579 priv->ule_sndu_remain = priv->ule_sndu_len; 580 priv->ule_skb->dev = dev; 581 /* Leave space for Ethernet or bridged SNDU header (eth hdr plus one MAC addr). */ 582 skb_reserve( priv->ule_skb, ETH_HLEN + ETH_ALEN ); 583 } 584 585 /* Copy data into our current skb. */ 586 how_much = min(priv->ule_sndu_remain, (int)ts_remain); 587 memcpy(skb_put(priv->ule_skb, how_much), from_where, how_much); 588 priv->ule_sndu_remain -= how_much; 589 ts_remain -= how_much; 590 from_where += how_much; 591 592 /* Check for complete payload. */ 593 if (priv->ule_sndu_remain <= 0) { 594 /* Check CRC32, we've got it in our skb already. */ 595 unsigned short ulen = htons(priv->ule_sndu_len); 596 unsigned short utype = htons(priv->ule_sndu_type); 597 const u8 *tail; 598 struct kvec iov[3] = { 599 { &ulen, sizeof ulen }, 600 { &utype, sizeof utype }, 601 { priv->ule_skb->data, priv->ule_skb->len - 4 } 602 }; 603 u32 ule_crc = ~0L, expected_crc; 604 if (priv->ule_dbit) { 605 /* Set D-bit for CRC32 verification, 606 * if it was set originally. */ 607 ulen |= 0x0080; 608 } 609 610 ule_crc = iov_crc32(ule_crc, iov, 3); 611 tail = skb_tail_pointer(priv->ule_skb); 612 expected_crc = *(tail - 4) << 24 | 613 *(tail - 3) << 16 | 614 *(tail - 2) << 8 | 615 *(tail - 1); 616 if (ule_crc != expected_crc) { 617 printk(KERN_WARNING "%lu: CRC32 check FAILED: %08x / %08x, SNDU len %d type %#x, ts_remain %d, next 2: %x.\n", 618 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); 619 620#ifdef ULE_DEBUG 621 hexdump( iov[0].iov_base, iov[0].iov_len ); 622 hexdump( iov[1].iov_base, iov[1].iov_len ); 623 hexdump( iov[2].iov_base, iov[2].iov_len ); 624 625 if (ule_where == ule_hist) { 626 hexdump( &ule_hist[98*TS_SZ], TS_SZ ); 627 hexdump( &ule_hist[99*TS_SZ], TS_SZ ); 628 } else if (ule_where == &ule_hist[TS_SZ]) { 629 hexdump( &ule_hist[99*TS_SZ], TS_SZ ); 630 hexdump( ule_hist, TS_SZ ); 631 } else { 632 hexdump( ule_where - TS_SZ - TS_SZ, TS_SZ ); 633 hexdump( ule_where - TS_SZ, TS_SZ ); 634 } 635 ule_dump = 1; 636#endif 637 638 priv->stats.rx_errors++; 639 priv->stats.rx_crc_errors++; 640 dev_kfree_skb(priv->ule_skb); 641 } else { 642 /* CRC32 verified OK. */ 643 u8 dest_addr[ETH_ALEN]; 644 static const u8 bc_addr[ETH_ALEN] = 645 { [ 0 ... ETH_ALEN-1] = 0xff }; 646 647 /* CRC32 was OK. Remove it from skb. */ 648 priv->ule_skb->tail -= 4; 649 priv->ule_skb->len -= 4; 650 651 if (!priv->ule_dbit) { 652 /* 653 * The destination MAC address is the 654 * next data in the skb. It comes 655 * before any extension headers. 656 * 657 * Check if the payload of this SNDU 658 * should be passed up the stack. 659 */ 660 register int drop = 0; 661 if (priv->rx_mode != RX_MODE_PROMISC) { 662 if (priv->ule_skb->data[0] & 0x01) { 663 /* multicast or broadcast */ 664 if (memcmp(priv->ule_skb->data, bc_addr, ETH_ALEN)) { 665 /* multicast */ 666 if (priv->rx_mode == RX_MODE_MULTI) { 667 int i; 668 for(i = 0; i < priv->multi_num && memcmp(priv->ule_skb->data, priv->multi_macs[i], ETH_ALEN); i++) 669 ; 670 if (i == priv->multi_num) 671 drop = 1; 672 } else if (priv->rx_mode != RX_MODE_ALL_MULTI) 673 drop = 1; /* no broadcast; */ 674 /* else: all multicast mode: accept all multicast packets */ 675 } 676 /* else: broadcast */ 677 } 678 else if (memcmp(priv->ule_skb->data, dev->dev_addr, ETH_ALEN)) 679 drop = 1; 680 /* else: destination address matches the MAC address of our receiver device */ 681 } 682 /* else: promiscious mode; pass everything up the stack */ 683 684 if (drop) { 685#ifdef ULE_DEBUG 686 dprintk("Dropping SNDU: MAC destination address does not match: dest addr: "MAC_ADDR_PRINTFMT", dev addr: "MAC_ADDR_PRINTFMT"\n", 687 MAX_ADDR_PRINTFMT_ARGS(priv->ule_skb->data), MAX_ADDR_PRINTFMT_ARGS(dev->dev_addr)); 688#endif 689 dev_kfree_skb(priv->ule_skb); 690 goto sndu_done; 691 } 692 else 693 { 694 skb_copy_from_linear_data(priv->ule_skb, 695 dest_addr, 696 ETH_ALEN); 697 skb_pull(priv->ule_skb, ETH_ALEN); 698 } 699 } 700 701 /* Handle ULE Extension Headers. */ 702 if (priv->ule_sndu_type < 1536) { 703 /* There is an extension header. Handle it accordingly. */ 704 int l = handle_ule_extensions(priv); 705 if (l < 0) { 706 /* Mandatory extension header unknown or TEST SNDU. Drop it. */ 707 // printk( KERN_WARNING "Dropping SNDU, extension headers.\n" ); 708 dev_kfree_skb(priv->ule_skb); 709 goto sndu_done; 710 } 711 skb_pull(priv->ule_skb, l); 712 } 713 714 /* 715 * Construct/assure correct ethernet header. 716 * Note: in bridged mode (priv->ule_bridged != 717 * 0) we already have the (original) ethernet 718 * header at the start of the payload (after 719 * optional dest. address and any extension 720 * headers). 721 */ 722 723 if (!priv->ule_bridged) { 724 skb_push(priv->ule_skb, ETH_HLEN); 725 ethh = (struct ethhdr *)priv->ule_skb->data; 726 if (!priv->ule_dbit) { 727 /* dest_addr buffer is only valid if priv->ule_dbit == 0 */ 728 memcpy(ethh->h_dest, dest_addr, ETH_ALEN); 729 memset(ethh->h_source, 0, ETH_ALEN); 730 } 731 else /* zeroize source and dest */ 732 memset( ethh, 0, ETH_ALEN*2 ); 733 734 ethh->h_proto = htons(priv->ule_sndu_type); 735 } 736 /* else: skb is in correct state; nothing to do. */ 737 priv->ule_bridged = 0; 738 739 /* Stuff into kernel's protocol stack. */ 740 priv->ule_skb->protocol = dvb_net_eth_type_trans(priv->ule_skb, dev); 741 /* If D-bit is set (i.e. destination MAC address not present), 742 * receive the packet anyhow. */ 743 /* if (priv->ule_dbit && skb->pkt_type == PACKET_OTHERHOST) 744 priv->ule_skb->pkt_type = PACKET_HOST; */ 745 priv->stats.rx_packets++; 746 priv->stats.rx_bytes += priv->ule_skb->len; 747 netif_rx(priv->ule_skb); 748 } 749 sndu_done: 750 /* Prepare for next SNDU. */ 751 reset_ule(priv); 752 } 753 754 /* More data in current TS (look at the bytes following the CRC32)? */ 755 if (ts_remain >= 2 && *((unsigned short *)from_where) != 0xFFFF) { 756 /* Next ULE SNDU starts right there. */ 757 new_ts = 0; 758 priv->ule_skb = NULL; 759 priv->ule_sndu_type_1 = 0; 760 priv->ule_sndu_len = 0; 761 // printk(KERN_WARNING "More data in current TS: [%#x %#x %#x %#x]\n", 762 // *(from_where + 0), *(from_where + 1), 763 // *(from_where + 2), *(from_where + 3)); 764 // printk(KERN_WARNING "ts @ %p, stopped @ %p:\n", ts, from_where + 0); 765 // hexdump(ts, 188); 766 } else { 767 new_ts = 1; 768 ts += TS_SZ; 769 priv->ts_count++; 770 if (priv->ule_skb == NULL) { 771 priv->need_pusi = 1; 772 priv->ule_sndu_type_1 = 0; 773 priv->ule_sndu_len = 0; 774 } 775 } 776 } /* for all available TS cells */ 777} 778 779static int dvb_net_ts_callback(const u8 *buffer1, size_t buffer1_len, 780 const u8 *buffer2, size_t buffer2_len, 781 struct dmx_ts_feed *feed, enum dmx_success success) 782{ 783 struct net_device *dev = feed->priv; 784 785 if (buffer2 != 0) 786 printk(KERN_WARNING "buffer2 not 0: %p.\n", buffer2); 787 if (buffer1_len > 32768) 788 printk(KERN_WARNING "length > 32k: %zu.\n", buffer1_len); 789 /* printk("TS callback: %u bytes, %u TS cells @ %p.\n", 790 buffer1_len, buffer1_len / TS_SZ, buffer1); */ 791 dvb_net_ule(dev, buffer1, buffer1_len); 792 return 0; 793} 794 795 796static void dvb_net_sec(struct net_device *dev, u8 *pkt, int pkt_len) 797{ 798 u8 *eth; 799 struct sk_buff *skb; 800 struct net_device_stats *stats = &(((struct dvb_net_priv *) dev->priv)->stats); 801 int snap = 0; 802 803 /* note: pkt_len includes a 32bit checksum */ 804 if (pkt_len < 16) { 805 printk("%s: IP/MPE packet length = %d too small.\n", 806 dev->name, pkt_len); 807 stats->rx_errors++; 808 stats->rx_length_errors++; 809 return; 810 } 811/* it seems some ISPs manage to screw up here, so we have to 812 * relax the error checks... */ 813 if ((pkt[5] & 0x3c) != 0x00) { 814 /* drop scrambled */ 815 stats->rx_errors++; 816 stats->rx_crc_errors++; 817 return; 818 } 819 if (pkt[5] & 0x02) { 820 /* handle LLC/SNAP, see rfc-1042 */ 821 if (pkt_len < 24 || memcmp(&pkt[12], "\xaa\xaa\x03\0\0\0", 6)) { 822 stats->rx_dropped++; 823 return; 824 } 825 snap = 8; 826 } 827 if (pkt[7]) { 828 stats->rx_errors++; 829 stats->rx_frame_errors++; 830 return; 831 } 832 833 /* we have 14 byte ethernet header (ip header follows); 834 * 12 byte MPE header; 4 byte checksum; + 2 byte alignment, 8 byte LLC/SNAP 835 */ 836 if (!(skb = dev_alloc_skb(pkt_len - 4 - 12 + 14 + 2 - snap))) { 837 //printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n", dev->name); 838 stats->rx_dropped++; 839 return; 840 } 841 skb_reserve(skb, 2); /* longword align L3 header */ 842 skb->dev = dev; 843 844 /* copy L3 payload */ 845 eth = (u8 *) skb_put(skb, pkt_len - 12 - 4 + 14 - snap); 846 memcpy(eth + 14, pkt + 12 + snap, pkt_len - 12 - 4 - snap); 847 848 /* create ethernet header: */ 849 eth[0]=pkt[0x0b]; 850 eth[1]=pkt[0x0a]; 851 eth[2]=pkt[0x09]; 852 eth[3]=pkt[0x08]; 853 eth[4]=pkt[0x04]; 854 eth[5]=pkt[0x03]; 855 856 eth[6]=eth[7]=eth[8]=eth[9]=eth[10]=eth[11]=0; 857 858 if (snap) { 859 eth[12] = pkt[18]; 860 eth[13] = pkt[19]; 861 } else { 862 /* protocol numbers are from rfc-1700 or 863 * http://www.iana.org/assignments/ethernet-numbers 864 */ 865 if (pkt[12] >> 4 == 6) { /* version field from IP header */ 866 eth[12] = 0x86; /* IPv6 */ 867 eth[13] = 0xdd; 868 } else { 869 eth[12] = 0x08; /* IPv4 */ 870 eth[13] = 0x00; 871 } 872 } 873 874 skb->protocol = dvb_net_eth_type_trans(skb, dev); 875 876 stats->rx_packets++; 877 stats->rx_bytes+=skb->len; 878 netif_rx(skb); 879} 880 881static int dvb_net_sec_callback(const u8 *buffer1, size_t buffer1_len, 882 const u8 *buffer2, size_t buffer2_len, 883 struct dmx_section_filter *filter, 884 enum dmx_success success) 885{ 886 struct net_device *dev = filter->priv; 887 888 /** 889 * we rely on the DVB API definition where exactly one complete 890 * section is delivered in buffer1 891 */ 892 dvb_net_sec (dev, (u8*) buffer1, buffer1_len); 893 return 0; 894} 895 896static int dvb_net_tx(struct sk_buff *skb, struct net_device *dev) 897{ 898 dev_kfree_skb(skb); 899 return 0; 900} 901 902static u8 mask_normal[6]={0xff, 0xff, 0xff, 0xff, 0xff, 0xff}; 903static u8 mask_allmulti[6]={0xff, 0xff, 0xff, 0x00, 0x00, 0x00}; 904static u8 mac_allmulti[6]={0x01, 0x00, 0x5e, 0x00, 0x00, 0x00}; 905static u8 mask_promisc[6]={0x00, 0x00, 0x00, 0x00, 0x00, 0x00}; 906 907static int dvb_net_filter_sec_set(struct net_device *dev, 908 struct dmx_section_filter **secfilter, 909 u8 *mac, u8 *mac_mask) 910{ 911 struct dvb_net_priv *priv = dev->priv; 912 int ret; 913 914 *secfilter=NULL; 915 ret = priv->secfeed->allocate_filter(priv->secfeed, secfilter); 916 if (ret<0) { 917 printk("%s: could not get filter\n", dev->name); 918 return ret; 919 } 920 921 (*secfilter)->priv=(void *) dev; 922 923 memset((*secfilter)->filter_value, 0x00, DMX_MAX_FILTER_SIZE); 924 memset((*secfilter)->filter_mask, 0x00, DMX_MAX_FILTER_SIZE); 925 memset((*secfilter)->filter_mode, 0xff, DMX_MAX_FILTER_SIZE); 926 927 (*secfilter)->filter_value[0]=0x3e; 928 (*secfilter)->filter_value[3]=mac[5]; 929 (*secfilter)->filter_value[4]=mac[4]; 930 (*secfilter)->filter_value[8]=mac[3]; 931 (*secfilter)->filter_value[9]=mac[2]; 932 (*secfilter)->filter_value[10]=mac[1]; 933 (*secfilter)->filter_value[11]=mac[0]; 934 935 (*secfilter)->filter_mask[0] = 0xff; 936 (*secfilter)->filter_mask[3] = mac_mask[5]; 937 (*secfilter)->filter_mask[4] = mac_mask[4]; 938 (*secfilter)->filter_mask[8] = mac_mask[3]; 939 (*secfilter)->filter_mask[9] = mac_mask[2]; 940 (*secfilter)->filter_mask[10] = mac_mask[1]; 941 (*secfilter)->filter_mask[11]=mac_mask[0]; 942 943 dprintk("%s: filter mac=%02x %02x %02x %02x %02x %02x\n", 944 dev->name, mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]); 945 dprintk("%s: filter mask=%02x %02x %02x %02x %02x %02x\n", 946 dev->name, mac_mask[0], mac_mask[1], mac_mask[2], 947 mac_mask[3], mac_mask[4], mac_mask[5]); 948 949 return 0; 950} 951 952static int dvb_net_feed_start(struct net_device *dev) 953{ 954 int ret = 0, i; 955 struct dvb_net_priv *priv = dev->priv; 956 struct dmx_demux *demux = priv->demux; 957 unsigned char *mac = (unsigned char *) dev->dev_addr; 958 959 dprintk("%s: rx_mode %i\n", __FUNCTION__, priv->rx_mode); 960 mutex_lock(&priv->mutex); 961 if (priv->tsfeed || priv->secfeed || priv->secfilter || priv->multi_secfilter[0]) 962 printk("%s: BUG %d\n", __FUNCTION__, __LINE__); 963 964 priv->secfeed=NULL; 965 priv->secfilter=NULL; 966 priv->tsfeed = NULL; 967 968 if (priv->feedtype == DVB_NET_FEEDTYPE_MPE) { 969 dprintk("%s: alloc secfeed\n", __FUNCTION__); 970 ret=demux->allocate_section_feed(demux, &priv->secfeed, 971 dvb_net_sec_callback); 972 if (ret<0) { 973 printk("%s: could not allocate section feed\n", dev->name); 974 goto error; 975 } 976 977 ret = priv->secfeed->set(priv->secfeed, priv->pid, 32768, 1); 978 979 if (ret<0) { 980 printk("%s: could not set section feed\n", dev->name); 981 priv->demux->release_section_feed(priv->demux, priv->secfeed); 982 priv->secfeed=NULL; 983 goto error; 984 } 985 986 if (priv->rx_mode != RX_MODE_PROMISC) { 987 dprintk("%s: set secfilter\n", __FUNCTION__); 988 dvb_net_filter_sec_set(dev, &priv->secfilter, mac, mask_normal); 989 } 990 991 switch (priv->rx_mode) { 992 case RX_MODE_MULTI: 993 for (i = 0; i < priv->multi_num; i++) { 994 dprintk("%s: set multi_secfilter[%d]\n", __FUNCTION__, i); 995 dvb_net_filter_sec_set(dev, &priv->multi_secfilter[i], 996 priv->multi_macs[i], mask_normal); 997 } 998 break; 999 case RX_MODE_ALL_MULTI: 1000 priv->multi_num=1; 1001 dprintk("%s: set multi_secfilter[0]\n", __FUNCTION__); 1002 dvb_net_filter_sec_set(dev, &priv->multi_secfilter[0], 1003 mac_allmulti, mask_allmulti); 1004 break; 1005 case RX_MODE_PROMISC: 1006 priv->multi_num=0; 1007 dprintk("%s: set secfilter\n", __FUNCTION__); 1008 dvb_net_filter_sec_set(dev, &priv->secfilter, mac, mask_promisc); 1009 break; 1010 } 1011 1012 dprintk("%s: start filtering\n", __FUNCTION__); 1013 priv->secfeed->start_filtering(priv->secfeed); 1014 } else if (priv->feedtype == DVB_NET_FEEDTYPE_ULE) { 1015 struct timespec timeout = { 0, 10000000 }; // 10 msec 1016 1017 /* we have payloads encapsulated in TS */ 1018 dprintk("%s: alloc tsfeed\n", __FUNCTION__); 1019 ret = demux->allocate_ts_feed(demux, &priv->tsfeed, dvb_net_ts_callback); 1020 if (ret < 0) { 1021 printk("%s: could not allocate ts feed\n", dev->name); 1022 goto error; 1023 } 1024 1025 /* Set netdevice pointer for ts decaps callback. */ 1026 priv->tsfeed->priv = (void *)dev; 1027 ret = priv->tsfeed->set(priv->tsfeed, 1028 priv->pid, /* pid */ 1029 TS_PACKET, /* type */ 1030 DMX_TS_PES_OTHER, /* pes type */ 1031 32768, /* circular buffer size */ 1032 timeout /* timeout */ 1033 ); 1034 1035 if (ret < 0) { 1036 printk("%s: could not set ts feed\n", dev->name); 1037 priv->demux->release_ts_feed(priv->demux, priv->tsfeed); 1038 priv->tsfeed = NULL; 1039 goto error; 1040 } 1041 1042 dprintk("%s: start filtering\n", __FUNCTION__); 1043 priv->tsfeed->start_filtering(priv->tsfeed); 1044 } else 1045 ret = -EINVAL; 1046 1047error: 1048 mutex_unlock(&priv->mutex); 1049 return ret; 1050} 1051 1052static int dvb_net_feed_stop(struct net_device *dev) 1053{ 1054 struct dvb_net_priv *priv = dev->priv; 1055 int i, ret = 0; 1056 1057 dprintk("%s\n", __FUNCTION__); 1058 mutex_lock(&priv->mutex); 1059 if (priv->feedtype == DVB_NET_FEEDTYPE_MPE) { 1060 if (priv->secfeed) { 1061 if (priv->secfeed->is_filtering) { 1062 dprintk("%s: stop secfeed\n", __FUNCTION__); 1063 priv->secfeed->stop_filtering(priv->secfeed); 1064 } 1065 1066 if (priv->secfilter) { 1067 dprintk("%s: release secfilter\n", __FUNCTION__); 1068 priv->secfeed->release_filter(priv->secfeed, 1069 priv->secfilter); 1070 priv->secfilter=NULL; 1071 } 1072 1073 for (i=0; i<priv->multi_num; i++) { 1074 if (priv->multi_secfilter[i]) { 1075 dprintk("%s: release multi_filter[%d]\n", 1076 __FUNCTION__, i); 1077 priv->secfeed->release_filter(priv->secfeed, 1078 priv->multi_secfilter[i]); 1079 priv->multi_secfilter[i] = NULL; 1080 } 1081 } 1082 1083 priv->demux->release_section_feed(priv->demux, priv->secfeed); 1084 priv->secfeed = NULL; 1085 } else 1086 printk("%s: no feed to stop\n", dev->name); 1087 } else if (priv->feedtype == DVB_NET_FEEDTYPE_ULE) { 1088 if (priv->tsfeed) { 1089 if (priv->tsfeed->is_filtering) { 1090 dprintk("%s: stop tsfeed\n", __FUNCTION__); 1091 priv->tsfeed->stop_filtering(priv->tsfeed); 1092 } 1093 priv->demux->release_ts_feed(priv->demux, priv->tsfeed); 1094 priv->tsfeed = NULL; 1095 } 1096 else 1097 printk("%s: no ts feed to stop\n", dev->name); 1098 } else 1099 ret = -EINVAL; 1100 mutex_unlock(&priv->mutex); 1101 return ret; 1102} 1103 1104 1105static int dvb_set_mc_filter (struct net_device *dev, struct dev_mc_list *mc) 1106{ 1107 struct dvb_net_priv *priv = dev->priv; 1108 1109 if (priv->multi_num == DVB_NET_MULTICAST_MAX) 1110 return -ENOMEM; 1111 1112 memcpy(priv->multi_macs[priv->multi_num], mc->dmi_addr, 6); 1113 1114 priv->multi_num++; 1115 return 0; 1116} 1117 1118 1119static void wq_set_multicast_list (struct work_struct *work) 1120{ 1121 struct dvb_net_priv *priv = 1122 container_of(work, struct dvb_net_priv, set_multicast_list_wq); 1123 struct net_device *dev = priv->net; 1124 1125 dvb_net_feed_stop(dev); 1126 priv->rx_mode = RX_MODE_UNI; 1127 netif_tx_lock_bh(dev); 1128 1129 if (dev->flags & IFF_PROMISC) { 1130 dprintk("%s: promiscuous mode\n", dev->name); 1131 priv->rx_mode = RX_MODE_PROMISC; 1132 } else if ((dev->flags & IFF_ALLMULTI)) { 1133 dprintk("%s: allmulti mode\n", dev->name); 1134 priv->rx_mode = RX_MODE_ALL_MULTI; 1135 } else if (dev->mc_count) { 1136 int mci; 1137 struct dev_mc_list *mc; 1138 1139 dprintk("%s: set_mc_list, %d entries\n", 1140 dev->name, dev->mc_count); 1141 1142 priv->rx_mode = RX_MODE_MULTI; 1143 priv->multi_num = 0; 1144 1145 for (mci = 0, mc=dev->mc_list; 1146 mci < dev->mc_count; 1147 mc = mc->next, mci++) { 1148 dvb_set_mc_filter(dev, mc); 1149 } 1150 } 1151 1152 netif_tx_unlock_bh(dev); 1153 dvb_net_feed_start(dev); 1154} 1155 1156 1157static void dvb_net_set_multicast_list (struct net_device *dev) 1158{ 1159 struct dvb_net_priv *priv = dev->priv; 1160 schedule_work(&priv->set_multicast_list_wq); 1161} 1162 1163 1164static void wq_restart_net_feed (struct work_struct *work) 1165{ 1166 struct dvb_net_priv *priv = 1167 container_of(work, struct dvb_net_priv, restart_net_feed_wq); 1168 struct net_device *dev = priv->net; 1169 1170 if (netif_running(dev)) { 1171 dvb_net_feed_stop(dev); 1172 dvb_net_feed_start(dev); 1173 } 1174} 1175 1176 1177static int dvb_net_set_mac (struct net_device *dev, void *p) 1178{ 1179 struct dvb_net_priv *priv = dev->priv; 1180 struct sockaddr *addr=p; 1181 1182 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len); 1183 1184 if (netif_running(dev)) 1185 schedule_work(&priv->restart_net_feed_wq); 1186 1187 return 0; 1188} 1189 1190 1191static int dvb_net_open(struct net_device *dev) 1192{ 1193 struct dvb_net_priv *priv = dev->priv; 1194 1195 priv->in_use++; 1196 dvb_net_feed_start(dev); 1197 return 0; 1198} 1199 1200 1201static int dvb_net_stop(struct net_device *dev) 1202{ 1203 struct dvb_net_priv *priv = dev->priv; 1204 1205 priv->in_use--; 1206 return dvb_net_feed_stop(dev); 1207} 1208 1209static struct net_device_stats * dvb_net_get_stats(struct net_device *dev) 1210{ 1211 return &((struct dvb_net_priv*) dev->priv)->stats; 1212} 1213 1214static void dvb_net_setup(struct net_device *dev) 1215{ 1216 ether_setup(dev); 1217 1218 dev->open = dvb_net_open; 1219 dev->stop = dvb_net_stop; 1220 dev->hard_start_xmit = dvb_net_tx; 1221 dev->get_stats = dvb_net_get_stats; 1222 dev->set_multicast_list = dvb_net_set_multicast_list; 1223 dev->set_mac_address = dvb_net_set_mac; 1224 dev->mtu = 4096; 1225 dev->mc_count = 0; 1226 dev->hard_header_cache = NULL; 1227 dev->flags |= IFF_NOARP; 1228} 1229 1230static int get_if(struct dvb_net *dvbnet) 1231{ 1232 int i; 1233 1234 for (i=0; i<DVB_NET_DEVICES_MAX; i++) 1235 if (!dvbnet->state[i]) 1236 break; 1237 1238 if (i == DVB_NET_DEVICES_MAX) 1239 return -1; 1240 1241 dvbnet->state[i]=1; 1242 return i; 1243} 1244 1245static int dvb_net_add_if(struct dvb_net *dvbnet, u16 pid, u8 feedtype) 1246{ 1247 struct net_device *net; 1248 struct dvb_net_priv *priv; 1249 int result; 1250 int if_num; 1251 1252 if (feedtype != DVB_NET_FEEDTYPE_MPE && feedtype != DVB_NET_FEEDTYPE_ULE) 1253 return -EINVAL; 1254 if ((if_num = get_if(dvbnet)) < 0) 1255 return -EINVAL; 1256 1257 net = alloc_netdev(sizeof(struct dvb_net_priv), "dvb", dvb_net_setup); 1258 if (!net) 1259 return -ENOMEM; 1260 1261 if (dvbnet->dvbdev->id) 1262 snprintf(net->name, IFNAMSIZ, "dvb%d%u%d", 1263 dvbnet->dvbdev->adapter->num, dvbnet->dvbdev->id, if_num); 1264 else 1265 /* compatibility fix to keep dvb0_0 format */ 1266 snprintf(net->name, IFNAMSIZ, "dvb%d_%d", 1267 dvbnet->dvbdev->adapter->num, if_num); 1268 1269 net->addr_len = 6; 1270 memcpy(net->dev_addr, dvbnet->dvbdev->adapter->proposed_mac, 6); 1271 1272 dvbnet->device[if_num] = net; 1273 1274 priv = net->priv; 1275 priv->net = net; 1276 priv->demux = dvbnet->demux; 1277 priv->pid = pid; 1278 priv->rx_mode = RX_MODE_UNI; 1279 priv->need_pusi = 1; 1280 priv->tscc = 0; 1281 priv->feedtype = feedtype; 1282 reset_ule(priv); 1283 1284 INIT_WORK(&priv->set_multicast_list_wq, wq_set_multicast_list); 1285 INIT_WORK(&priv->restart_net_feed_wq, wq_restart_net_feed); 1286 mutex_init(&priv->mutex); 1287 1288 net->base_addr = pid; 1289 1290 if ((result = register_netdev(net)) < 0) { 1291 dvbnet->device[if_num] = NULL; 1292 free_netdev(net); 1293 return result; 1294 } 1295 printk("dvb_net: created network interface %s\n", net->name); 1296 1297 return if_num; 1298} 1299 1300static int dvb_net_remove_if(struct dvb_net *dvbnet, unsigned long num) 1301{ 1302 struct net_device *net = dvbnet->device[num]; 1303 struct dvb_net_priv *priv; 1304 1305 if (!dvbnet->state[num]) 1306 return -EINVAL; 1307 priv = net->priv; 1308 if (priv->in_use) 1309 return -EBUSY; 1310 1311 dvb_net_stop(net); 1312 flush_scheduled_work(); 1313 printk("dvb_net: removed network interface %s\n", net->name); 1314 unregister_netdev(net); 1315 dvbnet->state[num]=0; 1316 dvbnet->device[num] = NULL; 1317 free_netdev(net); 1318 1319 return 0; 1320} 1321 1322static int dvb_net_do_ioctl(struct inode *inode, struct file *file, 1323 unsigned int cmd, void *parg) 1324{ 1325 struct dvb_device *dvbdev = file->private_data; 1326 struct dvb_net *dvbnet = dvbdev->priv; 1327 1328 if (((file->f_flags&O_ACCMODE)==O_RDONLY)) 1329 return -EPERM; 1330 1331 switch (cmd) { 1332 case NET_ADD_IF: 1333 { 1334 struct dvb_net_if *dvbnetif = parg; 1335 int result; 1336 1337 if (!capable(CAP_SYS_ADMIN)) 1338 return -EPERM; 1339 1340 if (!try_module_get(dvbdev->adapter->module)) 1341 return -EPERM; 1342 1343 result=dvb_net_add_if(dvbnet, dvbnetif->pid, dvbnetif->feedtype); 1344 if (result<0) { 1345 module_put(dvbdev->adapter->module); 1346 return result; 1347 } 1348 dvbnetif->if_num=result; 1349 break; 1350 } 1351 case NET_GET_IF: 1352 { 1353 struct net_device *netdev; 1354 struct dvb_net_priv *priv_data; 1355 struct dvb_net_if *dvbnetif = parg; 1356 1357 if (dvbnetif->if_num >= DVB_NET_DEVICES_MAX || 1358 !dvbnet->state[dvbnetif->if_num]) 1359 return -EINVAL; 1360 1361 netdev = dvbnet->device[dvbnetif->if_num]; 1362 1363 priv_data = netdev->priv; 1364 dvbnetif->pid=priv_data->pid; 1365 dvbnetif->feedtype=priv_data->feedtype; 1366 break; 1367 } 1368 case NET_REMOVE_IF: 1369 { 1370 int ret; 1371 1372 if (!capable(CAP_SYS_ADMIN)) 1373 return -EPERM; 1374 if ((unsigned long) parg >= DVB_NET_DEVICES_MAX) 1375 return -EINVAL; 1376 ret = dvb_net_remove_if(dvbnet, (unsigned long) parg); 1377 if (!ret) 1378 module_put(dvbdev->adapter->module); 1379 return ret; 1380 } 1381 1382 /* binary compatiblity cruft */ 1383 case __NET_ADD_IF_OLD: 1384 { 1385 struct __dvb_net_if_old *dvbnetif = parg; 1386 int result; 1387 1388 if (!capable(CAP_SYS_ADMIN)) 1389 return -EPERM; 1390 1391 if (!try_module_get(dvbdev->adapter->module)) 1392 return -EPERM; 1393 1394 result=dvb_net_add_if(dvbnet, dvbnetif->pid, DVB_NET_FEEDTYPE_MPE); 1395 if (result<0) { 1396 module_put(dvbdev->adapter->module); 1397 return result; 1398 } 1399 dvbnetif->if_num=result; 1400 break; 1401 } 1402 case __NET_GET_IF_OLD: 1403 { 1404 struct net_device *netdev; 1405 struct dvb_net_priv *priv_data; 1406 struct __dvb_net_if_old *dvbnetif = parg; 1407 1408 if (dvbnetif->if_num >= DVB_NET_DEVICES_MAX || 1409 !dvbnet->state[dvbnetif->if_num]) 1410 return -EINVAL; 1411 1412 netdev = dvbnet->device[dvbnetif->if_num]; 1413 1414 priv_data = netdev->priv; 1415 dvbnetif->pid=priv_data->pid; 1416 break; 1417 } 1418 default: 1419 return -ENOTTY; 1420 } 1421 return 0; 1422} 1423 1424static int dvb_net_ioctl(struct inode *inode, struct file *file, 1425 unsigned int cmd, unsigned long arg) 1426{ 1427 return dvb_usercopy(inode, file, cmd, arg, dvb_net_do_ioctl); 1428} 1429 1430static int dvb_net_close(struct inode *inode, struct file *file) 1431{ 1432 struct dvb_device *dvbdev = file->private_data; 1433 struct dvb_net *dvbnet = dvbdev->priv; 1434 1435 if (!dvbdev) 1436 return -ENODEV; 1437 1438 if ((file->f_flags & O_ACCMODE) == O_RDONLY) { 1439 dvbdev->readers++; 1440 } else { 1441 dvbdev->writers++; 1442 } 1443 1444 dvbdev->users++; 1445 1446 if(dvbdev->users == 1 && dvbnet->exit==1) { 1447 fops_put(file->f_op); 1448 file->f_op = NULL; 1449 wake_up(&dvbdev->wait_queue); 1450 } 1451 return 0; 1452} 1453 1454 1455static struct file_operations dvb_net_fops = { 1456 .owner = THIS_MODULE, 1457 .ioctl = dvb_net_ioctl, 1458 .open = dvb_generic_open, 1459 .release = dvb_net_close, 1460}; 1461 1462static struct dvb_device dvbdev_net = { 1463 .priv = NULL, 1464 .users = 1, 1465 .writers = 1, 1466 .fops = &dvb_net_fops, 1467}; 1468 1469 1470void dvb_net_release (struct dvb_net *dvbnet) 1471{ 1472 int i; 1473 1474 dvbnet->exit = 1; 1475 if (dvbnet->dvbdev->users < 1) 1476 wait_event(dvbnet->dvbdev->wait_queue, 1477 dvbnet->dvbdev->users==1); 1478 1479 dvb_unregister_device(dvbnet->dvbdev); 1480 1481 for (i=0; i<DVB_NET_DEVICES_MAX; i++) { 1482 if (!dvbnet->state[i]) 1483 continue; 1484 dvb_net_remove_if(dvbnet, i); 1485 } 1486} 1487EXPORT_SYMBOL(dvb_net_release); 1488 1489 1490int dvb_net_init (struct dvb_adapter *adap, struct dvb_net *dvbnet, 1491 struct dmx_demux *dmx) 1492{ 1493 int i; 1494 1495 dvbnet->demux = dmx; 1496 1497 for (i=0; i<DVB_NET_DEVICES_MAX; i++) 1498 dvbnet->state[i] = 0; 1499 1500 dvb_register_device (adap, &dvbnet->dvbdev, &dvbdev_net, 1501 dvbnet, DVB_DEVICE_NET); 1502 1503 return 0; 1504} 1505EXPORT_SYMBOL(dvb_net_init); 1506