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 #define pr_fmt(fmt) "dvb_net: " fmt 58 59 #include <linux/module.h> 60 #include <linux/kernel.h> 61 #include <linux/netdevice.h> 62 #include <linux/etherdevice.h> 63 #include <linux/dvb/net.h> 64 #include <linux/uio.h> 65 #include <asm/uaccess.h> 66 #include <linux/crc32.h> 67 #include <linux/mutex.h> 68 #include <linux/sched.h> 69 70 #include "dvb_demux.h" 71 #include "dvb_net.h" 72 73 static inline __u32 iov_crc32( __u32 c, struct kvec *iov, unsigned int cnt ) 74 { 75 unsigned int j; 76 for (j = 0; j < cnt; j++) 77 c = crc32_be( c, iov[j].iov_base, iov[j].iov_len ); 78 return c; 79 } 80 81 82 #define DVB_NET_MULTICAST_MAX 10 83 84 #undef ULE_DEBUG 85 86 #ifdef ULE_DEBUG 87 88 static void hexdump(const unsigned char *buf, unsigned short len) 89 { 90 print_hex_dump_debug("", DUMP_PREFIX_OFFSET, 16, 1, buf, len, true); 91 } 92 93 #endif 94 95 struct dvb_net_priv { 96 int in_use; 97 u16 pid; 98 struct net_device *net; 99 struct dvb_net *host; 100 struct dmx_demux *demux; 101 struct dmx_section_feed *secfeed; 102 struct dmx_section_filter *secfilter; 103 struct dmx_ts_feed *tsfeed; 104 int multi_num; 105 struct dmx_section_filter *multi_secfilter[DVB_NET_MULTICAST_MAX]; 106 unsigned char multi_macs[DVB_NET_MULTICAST_MAX][6]; 107 int rx_mode; 108 #define RX_MODE_UNI 0 109 #define RX_MODE_MULTI 1 110 #define RX_MODE_ALL_MULTI 2 111 #define RX_MODE_PROMISC 3 112 struct work_struct set_multicast_list_wq; 113 struct work_struct restart_net_feed_wq; 114 unsigned char feedtype; /* Either FEED_TYPE_ or FEED_TYPE_ULE */ 115 int need_pusi; /* Set to 1, if synchronization on PUSI required. */ 116 unsigned char tscc; /* TS continuity counter after sync on PUSI. */ 117 struct sk_buff *ule_skb; /* ULE SNDU decodes into this buffer. */ 118 unsigned char *ule_next_hdr; /* Pointer into skb to next ULE extension header. */ 119 unsigned short ule_sndu_len; /* ULE SNDU length in bytes, w/o D-Bit. */ 120 unsigned short ule_sndu_type; /* ULE SNDU type field, complete. */ 121 unsigned char ule_sndu_type_1; /* ULE SNDU type field, if split across 2 TS cells. */ 122 unsigned char ule_dbit; /* Whether the DestMAC address present 123 * or not (bit is set). */ 124 unsigned char ule_bridged; /* Whether the ULE_BRIDGED extension header was found. */ 125 int ule_sndu_remain; /* Nr. of bytes still required for current ULE SNDU. */ 126 unsigned long ts_count; /* Current ts cell counter. */ 127 struct mutex mutex; 128 }; 129 130 131 /** 132 * Determine the packet's protocol ID. The rule here is that we 133 * assume 802.3 if the type field is short enough to be a length. 134 * This is normal practice and works for any 'now in use' protocol. 135 * 136 * stolen from eth.c out of the linux kernel, hacked for dvb-device 137 * by Michael Holzt <kju@debian.org> 138 */ 139 static __be16 dvb_net_eth_type_trans(struct sk_buff *skb, 140 struct net_device *dev) 141 { 142 struct ethhdr *eth; 143 unsigned char *rawp; 144 145 skb_reset_mac_header(skb); 146 skb_pull(skb,dev->hard_header_len); 147 eth = eth_hdr(skb); 148 149 if (*eth->h_dest & 1) { 150 if(ether_addr_equal(eth->h_dest,dev->broadcast)) 151 skb->pkt_type=PACKET_BROADCAST; 152 else 153 skb->pkt_type=PACKET_MULTICAST; 154 } 155 156 if (ntohs(eth->h_proto) >= ETH_P_802_3_MIN) 157 return eth->h_proto; 158 159 rawp = skb->data; 160 161 /** 162 * This is a magic hack to spot IPX packets. Older Novell breaks 163 * the protocol design and runs IPX over 802.3 without an 802.2 LLC 164 * layer. We look for FFFF which isn't a used 802.2 SSAP/DSAP. This 165 * won't work for fault tolerant netware but does for the rest. 166 */ 167 if (*(unsigned short *)rawp == 0xFFFF) 168 return htons(ETH_P_802_3); 169 170 /** 171 * Real 802.2 LLC 172 */ 173 return htons(ETH_P_802_2); 174 } 175 176 #define TS_SZ 188 177 #define TS_SYNC 0x47 178 #define TS_TEI 0x80 179 #define TS_SC 0xC0 180 #define TS_PUSI 0x40 181 #define TS_AF_A 0x20 182 #define TS_AF_D 0x10 183 184 /* ULE Extension Header handlers. */ 185 186 #define ULE_TEST 0 187 #define ULE_BRIDGED 1 188 189 #define ULE_OPTEXTHDR_PADDING 0 190 191 static int ule_test_sndu( struct dvb_net_priv *p ) 192 { 193 return -1; 194 } 195 196 static int ule_bridged_sndu( struct dvb_net_priv *p ) 197 { 198 struct ethhdr *hdr = (struct ethhdr*) p->ule_next_hdr; 199 if(ntohs(hdr->h_proto) < ETH_P_802_3_MIN) { 200 int framelen = p->ule_sndu_len - ((p->ule_next_hdr+sizeof(struct ethhdr)) - p->ule_skb->data); 201 /* A frame Type < ETH_P_802_3_MIN for a bridged frame, introduces a LLC Length field. */ 202 if(framelen != ntohs(hdr->h_proto)) { 203 return -1; 204 } 205 } 206 /* Note: 207 * From RFC4326: 208 * "A bridged SNDU is a Mandatory Extension Header of Type 1. 209 * It must be the final (or only) extension header specified in the header chain of a SNDU." 210 * The 'ule_bridged' flag will cause the extension header processing loop to terminate. 211 */ 212 p->ule_bridged = 1; 213 return 0; 214 } 215 216 static int ule_exthdr_padding(struct dvb_net_priv *p) 217 { 218 return 0; 219 } 220 221 /** Handle ULE extension headers. 222 * Function is called after a successful CRC32 verification of an ULE SNDU to complete its decoding. 223 * Returns: >= 0: nr. of bytes consumed by next extension header 224 * -1: Mandatory extension header that is not recognized or TEST SNDU; discard. 225 */ 226 static int handle_one_ule_extension( struct dvb_net_priv *p ) 227 { 228 /* Table of mandatory extension header handlers. The header type is the index. */ 229 static int (*ule_mandatory_ext_handlers[255])( struct dvb_net_priv *p ) = 230 { [0] = ule_test_sndu, [1] = ule_bridged_sndu, [2] = NULL, }; 231 232 /* Table of optional extension header handlers. The header type is the index. */ 233 static int (*ule_optional_ext_handlers[255])( struct dvb_net_priv *p ) = 234 { [0] = ule_exthdr_padding, [1] = NULL, }; 235 236 int ext_len = 0; 237 unsigned char hlen = (p->ule_sndu_type & 0x0700) >> 8; 238 unsigned char htype = p->ule_sndu_type & 0x00FF; 239 240 /* Discriminate mandatory and optional extension headers. */ 241 if (hlen == 0) { 242 /* Mandatory extension header */ 243 if (ule_mandatory_ext_handlers[htype]) { 244 ext_len = ule_mandatory_ext_handlers[htype]( p ); 245 if(ext_len >= 0) { 246 p->ule_next_hdr += ext_len; 247 if (!p->ule_bridged) { 248 p->ule_sndu_type = ntohs(*(__be16 *)p->ule_next_hdr); 249 p->ule_next_hdr += 2; 250 } else { 251 p->ule_sndu_type = ntohs(*(__be16 *)(p->ule_next_hdr + ((p->ule_dbit ? 2 : 3) * ETH_ALEN))); 252 /* This assures the extension handling loop will terminate. */ 253 } 254 } 255 // else: extension handler failed or SNDU should be discarded 256 } else 257 ext_len = -1; /* SNDU has to be discarded. */ 258 } else { 259 /* Optional extension header. Calculate the length. */ 260 ext_len = hlen << 1; 261 /* Process the optional extension header according to its type. */ 262 if (ule_optional_ext_handlers[htype]) 263 (void)ule_optional_ext_handlers[htype]( p ); 264 p->ule_next_hdr += ext_len; 265 p->ule_sndu_type = ntohs( *(__be16 *)(p->ule_next_hdr-2) ); 266 /* 267 * note: the length of the next header type is included in the 268 * length of THIS optional extension header 269 */ 270 } 271 272 return ext_len; 273 } 274 275 static int handle_ule_extensions( struct dvb_net_priv *p ) 276 { 277 int total_ext_len = 0, l; 278 279 p->ule_next_hdr = p->ule_skb->data; 280 do { 281 l = handle_one_ule_extension( p ); 282 if (l < 0) 283 return l; /* Stop extension header processing and discard SNDU. */ 284 total_ext_len += l; 285 #ifdef ULE_DEBUG 286 pr_debug("ule_next_hdr=%p, ule_sndu_type=%i, l=%i, total_ext_len=%i\n", 287 p->ule_next_hdr, (int)p->ule_sndu_type, 288 l, total_ext_len); 289 #endif 290 291 } while (p->ule_sndu_type < ETH_P_802_3_MIN); 292 293 return total_ext_len; 294 } 295 296 297 /** Prepare for a new ULE SNDU: reset the decoder state. */ 298 static inline void reset_ule( struct dvb_net_priv *p ) 299 { 300 p->ule_skb = NULL; 301 p->ule_next_hdr = NULL; 302 p->ule_sndu_len = 0; 303 p->ule_sndu_type = 0; 304 p->ule_sndu_type_1 = 0; 305 p->ule_sndu_remain = 0; 306 p->ule_dbit = 0xFF; 307 p->ule_bridged = 0; 308 } 309 310 /** 311 * Decode ULE SNDUs according to draft-ietf-ipdvb-ule-03.txt from a sequence of 312 * TS cells of a single PID. 313 */ 314 315 struct dvb_net_ule_handle { 316 struct net_device *dev; 317 struct dvb_net_priv *priv; 318 struct ethhdr *ethh; 319 const u8 *buf; 320 size_t buf_len; 321 unsigned long skipped; 322 const u8 *ts, *ts_end, *from_where; 323 u8 ts_remain, how_much, new_ts; 324 bool error; 325 #ifdef ULE_DEBUG 326 /* 327 * The code inside ULE_DEBUG keeps a history of the 328 * last 100 TS cells processed. 329 */ 330 static unsigned char ule_hist[100*TS_SZ]; 331 static unsigned char *ule_where = ule_hist, ule_dump; 332 #endif 333 }; 334 335 static int dvb_net_ule_new_ts_cell(struct dvb_net_ule_handle *h) 336 { 337 /* We are about to process a new TS cell. */ 338 339 #ifdef ULE_DEBUG 340 if (h->ule_where >= &h->ule_hist[100*TS_SZ]) 341 h->ule_where = h->ule_hist; 342 memcpy(h->ule_where, h->ts, TS_SZ); 343 if (h->ule_dump) { 344 hexdump(h->ule_where, TS_SZ); 345 h->ule_dump = 0; 346 } 347 h->ule_where += TS_SZ; 348 #endif 349 350 /* 351 * Check TS h->error conditions: sync_byte, transport_error_indicator, 352 * scrambling_control . 353 */ 354 if ((h->ts[0] != TS_SYNC) || (h->ts[1] & TS_TEI) || 355 ((h->ts[3] & TS_SC) != 0)) { 356 pr_warn("%lu: Invalid TS cell: SYNC %#x, TEI %u, SC %#x.\n", 357 h->priv->ts_count, h->ts[0], 358 (h->ts[1] & TS_TEI) >> 7, 359 (h->ts[3] & TS_SC) >> 6); 360 361 /* Drop partly decoded SNDU, reset state, resync on PUSI. */ 362 if (h->priv->ule_skb) { 363 dev_kfree_skb(h->priv->ule_skb); 364 /* Prepare for next SNDU. */ 365 h->dev->stats.rx_errors++; 366 h->dev->stats.rx_frame_errors++; 367 } 368 reset_ule(h->priv); 369 h->priv->need_pusi = 1; 370 371 /* Continue with next TS cell. */ 372 h->ts += TS_SZ; 373 h->priv->ts_count++; 374 return 1; 375 } 376 377 h->ts_remain = 184; 378 h->from_where = h->ts + 4; 379 380 return 0; 381 } 382 383 static int dvb_net_ule_ts_pusi(struct dvb_net_ule_handle *h) 384 { 385 if (h->ts[1] & TS_PUSI) { 386 /* Find beginning of first ULE SNDU in current TS cell. */ 387 /* Synchronize continuity counter. */ 388 h->priv->tscc = h->ts[3] & 0x0F; 389 /* There is a pointer field here. */ 390 if (h->ts[4] > h->ts_remain) { 391 pr_err("%lu: Invalid ULE packet (pointer field %d)\n", 392 h->priv->ts_count, h->ts[4]); 393 h->ts += TS_SZ; 394 h->priv->ts_count++; 395 return 1; 396 } 397 /* Skip to destination of pointer field. */ 398 h->from_where = &h->ts[5] + h->ts[4]; 399 h->ts_remain -= 1 + h->ts[4]; 400 h->skipped = 0; 401 } else { 402 h->skipped++; 403 h->ts += TS_SZ; 404 h->priv->ts_count++; 405 return 1; 406 } 407 408 return 0; 409 } 410 411 static int dvb_net_ule_new_ts(struct dvb_net_ule_handle *h) 412 { 413 /* Check continuity counter. */ 414 if ((h->ts[3] & 0x0F) == h->priv->tscc) 415 h->priv->tscc = (h->priv->tscc + 1) & 0x0F; 416 else { 417 /* TS discontinuity handling: */ 418 pr_warn("%lu: TS discontinuity: got %#x, expected %#x.\n", 419 h->priv->ts_count, h->ts[3] & 0x0F, 420 h->priv->tscc); 421 /* Drop partly decoded SNDU, reset state, resync on PUSI. */ 422 if (h->priv->ule_skb) { 423 dev_kfree_skb(h->priv->ule_skb); 424 /* Prepare for next SNDU. */ 425 // reset_ule(h->priv); moved to below. 426 h->dev->stats.rx_errors++; 427 h->dev->stats.rx_frame_errors++; 428 } 429 reset_ule(h->priv); 430 /* skip to next PUSI. */ 431 h->priv->need_pusi = 1; 432 return 1; 433 } 434 /* 435 * If we still have an incomplete payload, but PUSI is 436 * set; some TS cells are missing. 437 * This is only possible here, if we missed exactly 16 TS 438 * cells (continuity counter wrap). 439 */ 440 if (h->ts[1] & TS_PUSI) { 441 if (!h->priv->need_pusi) { 442 if (!(*h->from_where < (h->ts_remain-1)) || 443 *h->from_where != h->priv->ule_sndu_remain) { 444 /* 445 * Pointer field is invalid. 446 * Drop this TS cell and any started ULE SNDU. 447 */ 448 pr_warn("%lu: Invalid pointer field: %u.\n", 449 h->priv->ts_count, 450 *h->from_where); 451 452 /* 453 * Drop partly decoded SNDU, reset state, 454 * resync on PUSI. 455 */ 456 if (h->priv->ule_skb) { 457 h->error = true; 458 dev_kfree_skb(h->priv->ule_skb); 459 } 460 461 if (h->error || h->priv->ule_sndu_remain) { 462 h->dev->stats.rx_errors++; 463 h->dev->stats.rx_frame_errors++; 464 h->error = false; 465 } 466 467 reset_ule(h->priv); 468 h->priv->need_pusi = 1; 469 return 1; 470 } 471 /* 472 * Skip pointer field (we're processing a 473 * packed payload). 474 */ 475 h->from_where += 1; 476 h->ts_remain -= 1; 477 } else 478 h->priv->need_pusi = 0; 479 480 if (h->priv->ule_sndu_remain > 183) { 481 /* 482 * Current SNDU lacks more data than there 483 * could be available in the current TS cell. 484 */ 485 h->dev->stats.rx_errors++; 486 h->dev->stats.rx_length_errors++; 487 pr_warn("%lu: Expected %d more SNDU bytes, but got PUSI (pf %d, h->ts_remain %d). Flushing incomplete payload.\n", 488 h->priv->ts_count, 489 h->priv->ule_sndu_remain, 490 h->ts[4], h->ts_remain); 491 dev_kfree_skb(h->priv->ule_skb); 492 /* Prepare for next SNDU. */ 493 reset_ule(h->priv); 494 /* 495 * Resync: go to where pointer field points to: 496 * start of next ULE SNDU. 497 */ 498 h->from_where += h->ts[4]; 499 h->ts_remain -= h->ts[4]; 500 } 501 } 502 return 0; 503 } 504 505 506 /* 507 * Start a new payload with skb. 508 * Find ULE header. It is only guaranteed that the 509 * length field (2 bytes) is contained in the current 510 * TS. 511 * Check h.ts_remain has to be >= 2 here. 512 */ 513 static int dvb_net_ule_new_payload(struct dvb_net_ule_handle *h) 514 { 515 if (h->ts_remain < 2) { 516 pr_warn("Invalid payload packing: only %d bytes left in TS. Resyncing.\n", 517 h->ts_remain); 518 h->priv->ule_sndu_len = 0; 519 h->priv->need_pusi = 1; 520 h->ts += TS_SZ; 521 return 1; 522 } 523 524 if (!h->priv->ule_sndu_len) { 525 /* Got at least two bytes, thus extrace the SNDU length. */ 526 h->priv->ule_sndu_len = h->from_where[0] << 8 | 527 h->from_where[1]; 528 if (h->priv->ule_sndu_len & 0x8000) { 529 /* D-Bit is set: no dest mac present. */ 530 h->priv->ule_sndu_len &= 0x7FFF; 531 h->priv->ule_dbit = 1; 532 } else 533 h->priv->ule_dbit = 0; 534 535 if (h->priv->ule_sndu_len < 5) { 536 pr_warn("%lu: Invalid ULE SNDU length %u. Resyncing.\n", 537 h->priv->ts_count, 538 h->priv->ule_sndu_len); 539 h->dev->stats.rx_errors++; 540 h->dev->stats.rx_length_errors++; 541 h->priv->ule_sndu_len = 0; 542 h->priv->need_pusi = 1; 543 h->new_ts = 1; 544 h->ts += TS_SZ; 545 h->priv->ts_count++; 546 return 1; 547 } 548 h->ts_remain -= 2; /* consume the 2 bytes SNDU length. */ 549 h->from_where += 2; 550 } 551 552 h->priv->ule_sndu_remain = h->priv->ule_sndu_len + 2; 553 /* 554 * State of current TS: 555 * h->ts_remain (remaining bytes in the current TS cell) 556 * 0 ule_type is not available now, we need the next TS cell 557 * 1 the first byte of the ule_type is present 558 * >=2 full ULE header present, maybe some payload data as well. 559 */ 560 switch (h->ts_remain) { 561 case 1: 562 h->priv->ule_sndu_remain--; 563 h->priv->ule_sndu_type = h->from_where[0] << 8; 564 565 /* first byte of ule_type is set. */ 566 h->priv->ule_sndu_type_1 = 1; 567 h->ts_remain -= 1; 568 h->from_where += 1; 569 /* fallthrough */ 570 case 0: 571 h->new_ts = 1; 572 h->ts += TS_SZ; 573 h->priv->ts_count++; 574 return 1; 575 576 default: /* complete ULE header is present in current TS. */ 577 /* Extract ULE type field. */ 578 if (h->priv->ule_sndu_type_1) { 579 h->priv->ule_sndu_type_1 = 0; 580 h->priv->ule_sndu_type |= h->from_where[0]; 581 h->from_where += 1; /* points to payload start. */ 582 h->ts_remain -= 1; 583 } else { 584 /* Complete type is present in new TS. */ 585 h->priv->ule_sndu_type = h->from_where[0] << 8 | 586 h->from_where[1]; 587 h->from_where += 2; /* points to payload start. */ 588 h->ts_remain -= 2; 589 } 590 break; 591 } 592 593 /* 594 * Allocate the skb (decoder target buffer) with the correct size, 595 * as follows: 596 * 597 * prepare for the largest case: bridged SNDU with MAC address 598 * (dbit = 0). 599 */ 600 h->priv->ule_skb = dev_alloc_skb(h->priv->ule_sndu_len + 601 ETH_HLEN + ETH_ALEN); 602 if (!h->priv->ule_skb) { 603 pr_notice("%s: Memory squeeze, dropping packet.\n", 604 h->dev->name); 605 h->dev->stats.rx_dropped++; 606 return -1; 607 } 608 609 /* This includes the CRC32 _and_ dest mac, if !dbit. */ 610 h->priv->ule_sndu_remain = h->priv->ule_sndu_len; 611 h->priv->ule_skb->dev = h->dev; 612 /* 613 * Leave space for Ethernet or bridged SNDU header 614 * (eth hdr plus one MAC addr). 615 */ 616 skb_reserve(h->priv->ule_skb, ETH_HLEN + ETH_ALEN); 617 618 return 0; 619 } 620 621 622 static int dvb_net_ule_should_drop(struct dvb_net_ule_handle *h) 623 { 624 static const u8 bc_addr[ETH_ALEN] = { [0 ... ETH_ALEN - 1] = 0xff }; 625 626 /* 627 * The destination MAC address is the next data in the skb. It comes 628 * before any extension headers. 629 * 630 * Check if the payload of this SNDU should be passed up the stack. 631 */ 632 if (h->priv->rx_mode == RX_MODE_PROMISC) 633 return 0; 634 635 if (h->priv->ule_skb->data[0] & 0x01) { 636 /* multicast or broadcast */ 637 if (!ether_addr_equal(h->priv->ule_skb->data, bc_addr)) { 638 /* multicast */ 639 if (h->priv->rx_mode == RX_MODE_MULTI) { 640 int i; 641 642 for (i = 0; i < h->priv->multi_num && 643 !ether_addr_equal(h->priv->ule_skb->data, 644 h->priv->multi_macs[i]); 645 i++) 646 ; 647 if (i == h->priv->multi_num) 648 return 1; 649 } else if (h->priv->rx_mode != RX_MODE_ALL_MULTI) 650 return 1; /* no broadcast; */ 651 /* 652 * else: 653 * all multicast mode: accept all multicast packets 654 */ 655 } 656 /* else: broadcast */ 657 } else if (!ether_addr_equal(h->priv->ule_skb->data, h->dev->dev_addr)) 658 return 1; 659 660 return 0; 661 } 662 663 664 static void dvb_net_ule_check_crc(struct dvb_net_ule_handle *h, 665 u32 ule_crc, u32 expected_crc) 666 { 667 u8 dest_addr[ETH_ALEN]; 668 669 if (ule_crc != expected_crc) { 670 pr_warn("%lu: CRC32 check FAILED: %08x / %08x, SNDU len %d type %#x, ts_remain %d, next 2: %x.\n", 671 h->priv->ts_count, ule_crc, expected_crc, 672 h->priv->ule_sndu_len, h->priv->ule_sndu_type, 673 h->ts_remain, 674 h->ts_remain > 2 ? 675 *(unsigned short *)h->from_where : 0); 676 677 #ifdef ULE_DEBUG 678 hexdump(iov[0].iov_base, iov[0].iov_len); 679 hexdump(iov[1].iov_base, iov[1].iov_len); 680 hexdump(iov[2].iov_base, iov[2].iov_len); 681 682 if (h->ule_where == h->ule_hist) { 683 hexdump(&h->ule_hist[98*TS_SZ], TS_SZ); 684 hexdump(&h->ule_hist[99*TS_SZ], TS_SZ); 685 } else if (h->ule_where == &h->ule_hist[TS_SZ]) { 686 hexdump(&h->ule_hist[99*TS_SZ], TS_SZ); 687 hexdump(h->ule_hist, TS_SZ); 688 } else { 689 hexdump(h->ule_where - TS_SZ - TS_SZ, TS_SZ); 690 hexdump(h->ule_where - TS_SZ, TS_SZ); 691 } 692 h->ule_dump = 1; 693 #endif 694 695 h->dev->stats.rx_errors++; 696 h->dev->stats.rx_crc_errors++; 697 dev_kfree_skb(h->priv->ule_skb); 698 699 return; 700 } 701 702 /* CRC32 verified OK. */ 703 704 /* CRC32 was OK, so remove it from skb. */ 705 h->priv->ule_skb->tail -= 4; 706 h->priv->ule_skb->len -= 4; 707 708 if (!h->priv->ule_dbit) { 709 if (dvb_net_ule_should_drop(h)) { 710 #ifdef ULE_DEBUG 711 netdev_dbg(h->dev, 712 "Dropping SNDU: MAC destination address does not match: dest addr: %pM, h->dev addr: %pM\n", 713 h->priv->ule_skb->data, h->dev->dev_addr); 714 #endif 715 dev_kfree_skb(h->priv->ule_skb); 716 return; 717 } 718 719 skb_copy_from_linear_data(h->priv->ule_skb, dest_addr, 720 ETH_ALEN); 721 skb_pull(h->priv->ule_skb, ETH_ALEN); 722 } 723 724 /* Handle ULE Extension Headers. */ 725 if (h->priv->ule_sndu_type < ETH_P_802_3_MIN) { 726 /* There is an extension header. Handle it accordingly. */ 727 int l = handle_ule_extensions(h->priv); 728 729 if (l < 0) { 730 /* 731 * Mandatory extension header unknown or TEST SNDU. 732 * Drop it. 733 */ 734 735 // pr_warn("Dropping SNDU, extension headers.\n" ); 736 dev_kfree_skb(h->priv->ule_skb); 737 return; 738 } 739 skb_pull(h->priv->ule_skb, l); 740 } 741 742 /* 743 * Construct/assure correct ethernet header. 744 * Note: in bridged mode (h->priv->ule_bridged != 0) 745 * we already have the (original) ethernet 746 * header at the start of the payload (after 747 * optional dest. address and any extension 748 * headers). 749 */ 750 if (!h->priv->ule_bridged) { 751 skb_push(h->priv->ule_skb, ETH_HLEN); 752 h->ethh = (struct ethhdr *)h->priv->ule_skb->data; 753 if (!h->priv->ule_dbit) { 754 /* 755 * dest_addr buffer is only valid if 756 * h->priv->ule_dbit == 0 757 */ 758 memcpy(h->ethh->h_dest, dest_addr, ETH_ALEN); 759 eth_zero_addr(h->ethh->h_source); 760 } else /* zeroize source and dest */ 761 memset(h->ethh, 0, ETH_ALEN * 2); 762 763 h->ethh->h_proto = htons(h->priv->ule_sndu_type); 764 } 765 /* else: skb is in correct state; nothing to do. */ 766 h->priv->ule_bridged = 0; 767 768 /* Stuff into kernel's protocol stack. */ 769 h->priv->ule_skb->protocol = dvb_net_eth_type_trans(h->priv->ule_skb, 770 h->dev); 771 /* 772 * If D-bit is set (i.e. destination MAC address not present), 773 * receive the packet anyhow. 774 */ 775 #if 0 776 if (h->priv->ule_dbit && skb->pkt_type == PACKET_OTHERHOST) 777 h->priv->ule_skb->pkt_type = PACKET_HOST; 778 #endif 779 h->dev->stats.rx_packets++; 780 h->dev->stats.rx_bytes += h->priv->ule_skb->len; 781 netif_rx(h->priv->ule_skb); 782 } 783 784 static void dvb_net_ule(struct net_device *dev, const u8 *buf, size_t buf_len) 785 { 786 int ret; 787 struct dvb_net_ule_handle h = { 788 .dev = dev, 789 .buf = buf, 790 .buf_len = buf_len, 791 .skipped = 0L, 792 .ts = NULL, 793 .ts_end = NULL, 794 .from_where = NULL, 795 .ts_remain = 0, 796 .how_much = 0, 797 .new_ts = 1, 798 .ethh = NULL, 799 .error = false, 800 #ifdef ULE_DEBUG 801 .ule_where = ule_hist, 802 #endif 803 }; 804 805 /* 806 * For all TS cells in current buffer. 807 * Appearently, we are called for every single TS cell. 808 */ 809 for (h.ts = h.buf, h.ts_end = h.buf + h.buf_len; 810 h.ts < h.ts_end; /* no incr. */) { 811 if (h.new_ts) { 812 /* We are about to process a new TS cell. */ 813 if (dvb_net_ule_new_ts_cell(&h)) 814 continue; 815 } 816 817 /* Synchronize on PUSI, if required. */ 818 if (h.priv->need_pusi) { 819 if (dvb_net_ule_ts_pusi(&h)) 820 continue; 821 } 822 823 if (h.new_ts) { 824 if (dvb_net_ule_new_ts(&h)) 825 continue; 826 } 827 828 /* Check if new payload needs to be started. */ 829 if (h.priv->ule_skb == NULL) { 830 ret = dvb_net_ule_new_payload(&h); 831 if (ret < 0) 832 return; 833 if (ret) 834 continue; 835 } 836 837 /* Copy data into our current skb. */ 838 h.how_much = min(h.priv->ule_sndu_remain, (int)h.ts_remain); 839 memcpy(skb_put(h.priv->ule_skb, h.how_much), 840 h.from_where, h.how_much); 841 h.priv->ule_sndu_remain -= h.how_much; 842 h.ts_remain -= h.how_much; 843 h.from_where += h.how_much; 844 845 /* Check for complete payload. */ 846 if (h.priv->ule_sndu_remain <= 0) { 847 /* Check CRC32, we've got it in our skb already. */ 848 __be16 ulen = htons(h.priv->ule_sndu_len); 849 __be16 utype = htons(h.priv->ule_sndu_type); 850 const u8 *tail; 851 struct kvec iov[3] = { 852 { &ulen, sizeof ulen }, 853 { &utype, sizeof utype }, 854 { h.priv->ule_skb->data, 855 h.priv->ule_skb->len - 4 } 856 }; 857 u32 ule_crc = ~0L, expected_crc; 858 if (h.priv->ule_dbit) { 859 /* Set D-bit for CRC32 verification, 860 * if it was set originally. */ 861 ulen |= htons(0x8000); 862 } 863 864 ule_crc = iov_crc32(ule_crc, iov, 3); 865 tail = skb_tail_pointer(h.priv->ule_skb); 866 expected_crc = *(tail - 4) << 24 | 867 *(tail - 3) << 16 | 868 *(tail - 2) << 8 | 869 *(tail - 1); 870 871 dvb_net_ule_check_crc(&h, ule_crc, expected_crc); 872 873 /* Prepare for next SNDU. */ 874 reset_ule(h.priv); 875 } 876 877 /* More data in current TS (look at the bytes following the CRC32)? */ 878 if (h.ts_remain >= 2 && *((unsigned short *)h.from_where) != 0xFFFF) { 879 /* Next ULE SNDU starts right there. */ 880 h.new_ts = 0; 881 h.priv->ule_skb = NULL; 882 h.priv->ule_sndu_type_1 = 0; 883 h.priv->ule_sndu_len = 0; 884 // pr_warn("More data in current TS: [%#x %#x %#x %#x]\n", 885 // *(h.from_where + 0), *(h.from_where + 1), 886 // *(h.from_where + 2), *(h.from_where + 3)); 887 // pr_warn("h.ts @ %p, stopped @ %p:\n", h.ts, h.from_where + 0); 888 // hexdump(h.ts, 188); 889 } else { 890 h.new_ts = 1; 891 h.ts += TS_SZ; 892 h.priv->ts_count++; 893 if (h.priv->ule_skb == NULL) { 894 h.priv->need_pusi = 1; 895 h.priv->ule_sndu_type_1 = 0; 896 h.priv->ule_sndu_len = 0; 897 } 898 } 899 } /* for all available TS cells */ 900 } 901 902 static int dvb_net_ts_callback(const u8 *buffer1, size_t buffer1_len, 903 const u8 *buffer2, size_t buffer2_len, 904 struct dmx_ts_feed *feed) 905 { 906 struct net_device *dev = feed->priv; 907 908 if (buffer2) 909 pr_warn("buffer2 not NULL: %p.\n", buffer2); 910 if (buffer1_len > 32768) 911 pr_warn("length > 32k: %zu.\n", buffer1_len); 912 /* pr_info("TS callback: %u bytes, %u TS cells @ %p.\n", 913 buffer1_len, buffer1_len / TS_SZ, buffer1); */ 914 dvb_net_ule(dev, buffer1, buffer1_len); 915 return 0; 916 } 917 918 919 static void dvb_net_sec(struct net_device *dev, 920 const u8 *pkt, int pkt_len) 921 { 922 u8 *eth; 923 struct sk_buff *skb; 924 struct net_device_stats *stats = &dev->stats; 925 int snap = 0; 926 927 /* note: pkt_len includes a 32bit checksum */ 928 if (pkt_len < 16) { 929 pr_warn("%s: IP/MPE packet length = %d too small.\n", 930 dev->name, pkt_len); 931 stats->rx_errors++; 932 stats->rx_length_errors++; 933 return; 934 } 935 /* it seems some ISPs manage to screw up here, so we have to 936 * relax the error checks... */ 937 #if 0 938 if ((pkt[5] & 0xfd) != 0xc1) { 939 /* drop scrambled or broken packets */ 940 #else 941 if ((pkt[5] & 0x3c) != 0x00) { 942 /* drop scrambled */ 943 #endif 944 stats->rx_errors++; 945 stats->rx_crc_errors++; 946 return; 947 } 948 if (pkt[5] & 0x02) { 949 /* handle LLC/SNAP, see rfc-1042 */ 950 if (pkt_len < 24 || memcmp(&pkt[12], "\xaa\xaa\x03\0\0\0", 6)) { 951 stats->rx_dropped++; 952 return; 953 } 954 snap = 8; 955 } 956 if (pkt[7]) { 957 /* FIXME: assemble datagram from multiple sections */ 958 stats->rx_errors++; 959 stats->rx_frame_errors++; 960 return; 961 } 962 963 /* we have 14 byte ethernet header (ip header follows); 964 * 12 byte MPE header; 4 byte checksum; + 2 byte alignment, 8 byte LLC/SNAP 965 */ 966 if (!(skb = dev_alloc_skb(pkt_len - 4 - 12 + 14 + 2 - snap))) { 967 //pr_notice("%s: Memory squeeze, dropping packet.\n", dev->name); 968 stats->rx_dropped++; 969 return; 970 } 971 skb_reserve(skb, 2); /* longword align L3 header */ 972 skb->dev = dev; 973 974 /* copy L3 payload */ 975 eth = (u8 *) skb_put(skb, pkt_len - 12 - 4 + 14 - snap); 976 memcpy(eth + 14, pkt + 12 + snap, pkt_len - 12 - 4 - snap); 977 978 /* create ethernet header: */ 979 eth[0]=pkt[0x0b]; 980 eth[1]=pkt[0x0a]; 981 eth[2]=pkt[0x09]; 982 eth[3]=pkt[0x08]; 983 eth[4]=pkt[0x04]; 984 eth[5]=pkt[0x03]; 985 986 eth[6]=eth[7]=eth[8]=eth[9]=eth[10]=eth[11]=0; 987 988 if (snap) { 989 eth[12] = pkt[18]; 990 eth[13] = pkt[19]; 991 } else { 992 /* protocol numbers are from rfc-1700 or 993 * http://www.iana.org/assignments/ethernet-numbers 994 */ 995 if (pkt[12] >> 4 == 6) { /* version field from IP header */ 996 eth[12] = 0x86; /* IPv6 */ 997 eth[13] = 0xdd; 998 } else { 999 eth[12] = 0x08; /* IPv4 */ 1000 eth[13] = 0x00; 1001 } 1002 } 1003 1004 skb->protocol = dvb_net_eth_type_trans(skb, dev); 1005 1006 stats->rx_packets++; 1007 stats->rx_bytes+=skb->len; 1008 netif_rx(skb); 1009 } 1010 1011 static int dvb_net_sec_callback(const u8 *buffer1, size_t buffer1_len, 1012 const u8 *buffer2, size_t buffer2_len, 1013 struct dmx_section_filter *filter) 1014 { 1015 struct net_device *dev = filter->priv; 1016 1017 /** 1018 * we rely on the DVB API definition where exactly one complete 1019 * section is delivered in buffer1 1020 */ 1021 dvb_net_sec (dev, buffer1, buffer1_len); 1022 return 0; 1023 } 1024 1025 static int dvb_net_tx(struct sk_buff *skb, struct net_device *dev) 1026 { 1027 dev_kfree_skb(skb); 1028 return NETDEV_TX_OK; 1029 } 1030 1031 static u8 mask_normal[6]={0xff, 0xff, 0xff, 0xff, 0xff, 0xff}; 1032 static u8 mask_allmulti[6]={0xff, 0xff, 0xff, 0x00, 0x00, 0x00}; 1033 static u8 mac_allmulti[6]={0x01, 0x00, 0x5e, 0x00, 0x00, 0x00}; 1034 static u8 mask_promisc[6]={0x00, 0x00, 0x00, 0x00, 0x00, 0x00}; 1035 1036 static int dvb_net_filter_sec_set(struct net_device *dev, 1037 struct dmx_section_filter **secfilter, 1038 u8 *mac, u8 *mac_mask) 1039 { 1040 struct dvb_net_priv *priv = netdev_priv(dev); 1041 int ret; 1042 1043 *secfilter=NULL; 1044 ret = priv->secfeed->allocate_filter(priv->secfeed, secfilter); 1045 if (ret<0) { 1046 pr_err("%s: could not get filter\n", dev->name); 1047 return ret; 1048 } 1049 1050 (*secfilter)->priv=(void *) dev; 1051 1052 memset((*secfilter)->filter_value, 0x00, DMX_MAX_FILTER_SIZE); 1053 memset((*secfilter)->filter_mask, 0x00, DMX_MAX_FILTER_SIZE); 1054 memset((*secfilter)->filter_mode, 0xff, DMX_MAX_FILTER_SIZE); 1055 1056 (*secfilter)->filter_value[0]=0x3e; 1057 (*secfilter)->filter_value[3]=mac[5]; 1058 (*secfilter)->filter_value[4]=mac[4]; 1059 (*secfilter)->filter_value[8]=mac[3]; 1060 (*secfilter)->filter_value[9]=mac[2]; 1061 (*secfilter)->filter_value[10]=mac[1]; 1062 (*secfilter)->filter_value[11]=mac[0]; 1063 1064 (*secfilter)->filter_mask[0] = 0xff; 1065 (*secfilter)->filter_mask[3] = mac_mask[5]; 1066 (*secfilter)->filter_mask[4] = mac_mask[4]; 1067 (*secfilter)->filter_mask[8] = mac_mask[3]; 1068 (*secfilter)->filter_mask[9] = mac_mask[2]; 1069 (*secfilter)->filter_mask[10] = mac_mask[1]; 1070 (*secfilter)->filter_mask[11]=mac_mask[0]; 1071 1072 netdev_dbg(dev, "filter mac=%pM mask=%pM\n", mac, mac_mask); 1073 1074 return 0; 1075 } 1076 1077 static int dvb_net_feed_start(struct net_device *dev) 1078 { 1079 int ret = 0, i; 1080 struct dvb_net_priv *priv = netdev_priv(dev); 1081 struct dmx_demux *demux = priv->demux; 1082 unsigned char *mac = (unsigned char *) dev->dev_addr; 1083 1084 netdev_dbg(dev, "rx_mode %i\n", priv->rx_mode); 1085 mutex_lock(&priv->mutex); 1086 if (priv->tsfeed || priv->secfeed || priv->secfilter || priv->multi_secfilter[0]) 1087 pr_err("%s: BUG %d\n", __func__, __LINE__); 1088 1089 priv->secfeed=NULL; 1090 priv->secfilter=NULL; 1091 priv->tsfeed = NULL; 1092 1093 if (priv->feedtype == DVB_NET_FEEDTYPE_MPE) { 1094 netdev_dbg(dev, "alloc secfeed\n"); 1095 ret=demux->allocate_section_feed(demux, &priv->secfeed, 1096 dvb_net_sec_callback); 1097 if (ret<0) { 1098 pr_err("%s: could not allocate section feed\n", 1099 dev->name); 1100 goto error; 1101 } 1102 1103 ret = priv->secfeed->set(priv->secfeed, priv->pid, 1); 1104 1105 if (ret<0) { 1106 pr_err("%s: could not set section feed\n", dev->name); 1107 priv->demux->release_section_feed(priv->demux, priv->secfeed); 1108 priv->secfeed=NULL; 1109 goto error; 1110 } 1111 1112 if (priv->rx_mode != RX_MODE_PROMISC) { 1113 netdev_dbg(dev, "set secfilter\n"); 1114 dvb_net_filter_sec_set(dev, &priv->secfilter, mac, mask_normal); 1115 } 1116 1117 switch (priv->rx_mode) { 1118 case RX_MODE_MULTI: 1119 for (i = 0; i < priv->multi_num; i++) { 1120 netdev_dbg(dev, "set multi_secfilter[%d]\n", i); 1121 dvb_net_filter_sec_set(dev, &priv->multi_secfilter[i], 1122 priv->multi_macs[i], mask_normal); 1123 } 1124 break; 1125 case RX_MODE_ALL_MULTI: 1126 priv->multi_num=1; 1127 netdev_dbg(dev, "set multi_secfilter[0]\n"); 1128 dvb_net_filter_sec_set(dev, &priv->multi_secfilter[0], 1129 mac_allmulti, mask_allmulti); 1130 break; 1131 case RX_MODE_PROMISC: 1132 priv->multi_num=0; 1133 netdev_dbg(dev, "set secfilter\n"); 1134 dvb_net_filter_sec_set(dev, &priv->secfilter, mac, mask_promisc); 1135 break; 1136 } 1137 1138 netdev_dbg(dev, "start filtering\n"); 1139 priv->secfeed->start_filtering(priv->secfeed); 1140 } else if (priv->feedtype == DVB_NET_FEEDTYPE_ULE) { 1141 ktime_t timeout = ns_to_ktime(10 * NSEC_PER_MSEC); 1142 1143 /* we have payloads encapsulated in TS */ 1144 netdev_dbg(dev, "alloc tsfeed\n"); 1145 ret = demux->allocate_ts_feed(demux, &priv->tsfeed, dvb_net_ts_callback); 1146 if (ret < 0) { 1147 pr_err("%s: could not allocate ts feed\n", dev->name); 1148 goto error; 1149 } 1150 1151 /* Set netdevice pointer for ts decaps callback. */ 1152 priv->tsfeed->priv = (void *)dev; 1153 ret = priv->tsfeed->set(priv->tsfeed, 1154 priv->pid, /* pid */ 1155 TS_PACKET, /* type */ 1156 DMX_PES_OTHER, /* pes type */ 1157 timeout /* timeout */ 1158 ); 1159 1160 if (ret < 0) { 1161 pr_err("%s: could not set ts feed\n", dev->name); 1162 priv->demux->release_ts_feed(priv->demux, priv->tsfeed); 1163 priv->tsfeed = NULL; 1164 goto error; 1165 } 1166 1167 netdev_dbg(dev, "start filtering\n"); 1168 priv->tsfeed->start_filtering(priv->tsfeed); 1169 } else 1170 ret = -EINVAL; 1171 1172 error: 1173 mutex_unlock(&priv->mutex); 1174 return ret; 1175 } 1176 1177 static int dvb_net_feed_stop(struct net_device *dev) 1178 { 1179 struct dvb_net_priv *priv = netdev_priv(dev); 1180 int i, ret = 0; 1181 1182 mutex_lock(&priv->mutex); 1183 if (priv->feedtype == DVB_NET_FEEDTYPE_MPE) { 1184 if (priv->secfeed) { 1185 if (priv->secfeed->is_filtering) { 1186 netdev_dbg(dev, "stop secfeed\n"); 1187 priv->secfeed->stop_filtering(priv->secfeed); 1188 } 1189 1190 if (priv->secfilter) { 1191 netdev_dbg(dev, "release secfilter\n"); 1192 priv->secfeed->release_filter(priv->secfeed, 1193 priv->secfilter); 1194 priv->secfilter=NULL; 1195 } 1196 1197 for (i=0; i<priv->multi_num; i++) { 1198 if (priv->multi_secfilter[i]) { 1199 netdev_dbg(dev, "release multi_filter[%d]\n", 1200 i); 1201 priv->secfeed->release_filter(priv->secfeed, 1202 priv->multi_secfilter[i]); 1203 priv->multi_secfilter[i] = NULL; 1204 } 1205 } 1206 1207 priv->demux->release_section_feed(priv->demux, priv->secfeed); 1208 priv->secfeed = NULL; 1209 } else 1210 pr_err("%s: no feed to stop\n", dev->name); 1211 } else if (priv->feedtype == DVB_NET_FEEDTYPE_ULE) { 1212 if (priv->tsfeed) { 1213 if (priv->tsfeed->is_filtering) { 1214 netdev_dbg(dev, "stop tsfeed\n"); 1215 priv->tsfeed->stop_filtering(priv->tsfeed); 1216 } 1217 priv->demux->release_ts_feed(priv->demux, priv->tsfeed); 1218 priv->tsfeed = NULL; 1219 } 1220 else 1221 pr_err("%s: no ts feed to stop\n", dev->name); 1222 } else 1223 ret = -EINVAL; 1224 mutex_unlock(&priv->mutex); 1225 return ret; 1226 } 1227 1228 1229 static int dvb_set_mc_filter(struct net_device *dev, unsigned char *addr) 1230 { 1231 struct dvb_net_priv *priv = netdev_priv(dev); 1232 1233 if (priv->multi_num == DVB_NET_MULTICAST_MAX) 1234 return -ENOMEM; 1235 1236 memcpy(priv->multi_macs[priv->multi_num], addr, ETH_ALEN); 1237 1238 priv->multi_num++; 1239 return 0; 1240 } 1241 1242 1243 static void wq_set_multicast_list (struct work_struct *work) 1244 { 1245 struct dvb_net_priv *priv = 1246 container_of(work, struct dvb_net_priv, set_multicast_list_wq); 1247 struct net_device *dev = priv->net; 1248 1249 dvb_net_feed_stop(dev); 1250 priv->rx_mode = RX_MODE_UNI; 1251 netif_addr_lock_bh(dev); 1252 1253 if (dev->flags & IFF_PROMISC) { 1254 netdev_dbg(dev, "promiscuous mode\n"); 1255 priv->rx_mode = RX_MODE_PROMISC; 1256 } else if ((dev->flags & IFF_ALLMULTI)) { 1257 netdev_dbg(dev, "allmulti mode\n"); 1258 priv->rx_mode = RX_MODE_ALL_MULTI; 1259 } else if (!netdev_mc_empty(dev)) { 1260 struct netdev_hw_addr *ha; 1261 1262 netdev_dbg(dev, "set_mc_list, %d entries\n", 1263 netdev_mc_count(dev)); 1264 1265 priv->rx_mode = RX_MODE_MULTI; 1266 priv->multi_num = 0; 1267 1268 netdev_for_each_mc_addr(ha, dev) 1269 dvb_set_mc_filter(dev, ha->addr); 1270 } 1271 1272 netif_addr_unlock_bh(dev); 1273 dvb_net_feed_start(dev); 1274 } 1275 1276 1277 static void dvb_net_set_multicast_list (struct net_device *dev) 1278 { 1279 struct dvb_net_priv *priv = netdev_priv(dev); 1280 schedule_work(&priv->set_multicast_list_wq); 1281 } 1282 1283 1284 static void wq_restart_net_feed (struct work_struct *work) 1285 { 1286 struct dvb_net_priv *priv = 1287 container_of(work, struct dvb_net_priv, restart_net_feed_wq); 1288 struct net_device *dev = priv->net; 1289 1290 if (netif_running(dev)) { 1291 dvb_net_feed_stop(dev); 1292 dvb_net_feed_start(dev); 1293 } 1294 } 1295 1296 1297 static int dvb_net_set_mac (struct net_device *dev, void *p) 1298 { 1299 struct dvb_net_priv *priv = netdev_priv(dev); 1300 struct sockaddr *addr=p; 1301 1302 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len); 1303 1304 if (netif_running(dev)) 1305 schedule_work(&priv->restart_net_feed_wq); 1306 1307 return 0; 1308 } 1309 1310 1311 static int dvb_net_open(struct net_device *dev) 1312 { 1313 struct dvb_net_priv *priv = netdev_priv(dev); 1314 1315 priv->in_use++; 1316 dvb_net_feed_start(dev); 1317 return 0; 1318 } 1319 1320 1321 static int dvb_net_stop(struct net_device *dev) 1322 { 1323 struct dvb_net_priv *priv = netdev_priv(dev); 1324 1325 priv->in_use--; 1326 return dvb_net_feed_stop(dev); 1327 } 1328 1329 static const struct header_ops dvb_header_ops = { 1330 .create = eth_header, 1331 .parse = eth_header_parse, 1332 }; 1333 1334 1335 static const struct net_device_ops dvb_netdev_ops = { 1336 .ndo_open = dvb_net_open, 1337 .ndo_stop = dvb_net_stop, 1338 .ndo_start_xmit = dvb_net_tx, 1339 .ndo_set_rx_mode = dvb_net_set_multicast_list, 1340 .ndo_set_mac_address = dvb_net_set_mac, 1341 .ndo_validate_addr = eth_validate_addr, 1342 }; 1343 1344 static void dvb_net_setup(struct net_device *dev) 1345 { 1346 ether_setup(dev); 1347 1348 dev->header_ops = &dvb_header_ops; 1349 dev->netdev_ops = &dvb_netdev_ops; 1350 dev->mtu = 4096; 1351 dev->max_mtu = 4096; 1352 1353 dev->flags |= IFF_NOARP; 1354 } 1355 1356 static int get_if(struct dvb_net *dvbnet) 1357 { 1358 int i; 1359 1360 for (i=0; i<DVB_NET_DEVICES_MAX; i++) 1361 if (!dvbnet->state[i]) 1362 break; 1363 1364 if (i == DVB_NET_DEVICES_MAX) 1365 return -1; 1366 1367 dvbnet->state[i]=1; 1368 return i; 1369 } 1370 1371 static int dvb_net_add_if(struct dvb_net *dvbnet, u16 pid, u8 feedtype) 1372 { 1373 struct net_device *net; 1374 struct dvb_net_priv *priv; 1375 int result; 1376 int if_num; 1377 1378 if (feedtype != DVB_NET_FEEDTYPE_MPE && feedtype != DVB_NET_FEEDTYPE_ULE) 1379 return -EINVAL; 1380 if ((if_num = get_if(dvbnet)) < 0) 1381 return -EINVAL; 1382 1383 net = alloc_netdev(sizeof(struct dvb_net_priv), "dvb", 1384 NET_NAME_UNKNOWN, dvb_net_setup); 1385 if (!net) 1386 return -ENOMEM; 1387 1388 if (dvbnet->dvbdev->id) 1389 snprintf(net->name, IFNAMSIZ, "dvb%d%u%d", 1390 dvbnet->dvbdev->adapter->num, dvbnet->dvbdev->id, if_num); 1391 else 1392 /* compatibility fix to keep dvb0_0 format */ 1393 snprintf(net->name, IFNAMSIZ, "dvb%d_%d", 1394 dvbnet->dvbdev->adapter->num, if_num); 1395 1396 net->addr_len = 6; 1397 memcpy(net->dev_addr, dvbnet->dvbdev->adapter->proposed_mac, 6); 1398 1399 dvbnet->device[if_num] = net; 1400 1401 priv = netdev_priv(net); 1402 priv->net = net; 1403 priv->demux = dvbnet->demux; 1404 priv->pid = pid; 1405 priv->rx_mode = RX_MODE_UNI; 1406 priv->need_pusi = 1; 1407 priv->tscc = 0; 1408 priv->feedtype = feedtype; 1409 reset_ule(priv); 1410 1411 INIT_WORK(&priv->set_multicast_list_wq, wq_set_multicast_list); 1412 INIT_WORK(&priv->restart_net_feed_wq, wq_restart_net_feed); 1413 mutex_init(&priv->mutex); 1414 1415 net->base_addr = pid; 1416 1417 if ((result = register_netdev(net)) < 0) { 1418 dvbnet->device[if_num] = NULL; 1419 free_netdev(net); 1420 return result; 1421 } 1422 pr_info("created network interface %s\n", net->name); 1423 1424 return if_num; 1425 } 1426 1427 static int dvb_net_remove_if(struct dvb_net *dvbnet, unsigned long num) 1428 { 1429 struct net_device *net = dvbnet->device[num]; 1430 struct dvb_net_priv *priv; 1431 1432 if (!dvbnet->state[num]) 1433 return -EINVAL; 1434 priv = netdev_priv(net); 1435 if (priv->in_use) 1436 return -EBUSY; 1437 1438 dvb_net_stop(net); 1439 flush_work(&priv->set_multicast_list_wq); 1440 flush_work(&priv->restart_net_feed_wq); 1441 pr_info("removed network interface %s\n", net->name); 1442 unregister_netdev(net); 1443 dvbnet->state[num]=0; 1444 dvbnet->device[num] = NULL; 1445 free_netdev(net); 1446 1447 return 0; 1448 } 1449 1450 static int dvb_net_do_ioctl(struct file *file, 1451 unsigned int cmd, void *parg) 1452 { 1453 struct dvb_device *dvbdev = file->private_data; 1454 struct dvb_net *dvbnet = dvbdev->priv; 1455 int ret = 0; 1456 1457 if (((file->f_flags&O_ACCMODE)==O_RDONLY)) 1458 return -EPERM; 1459 1460 if (mutex_lock_interruptible(&dvbnet->ioctl_mutex)) 1461 return -ERESTARTSYS; 1462 1463 switch (cmd) { 1464 case NET_ADD_IF: 1465 { 1466 struct dvb_net_if *dvbnetif = parg; 1467 int result; 1468 1469 if (!capable(CAP_SYS_ADMIN)) { 1470 ret = -EPERM; 1471 goto ioctl_error; 1472 } 1473 1474 if (!try_module_get(dvbdev->adapter->module)) { 1475 ret = -EPERM; 1476 goto ioctl_error; 1477 } 1478 1479 result=dvb_net_add_if(dvbnet, dvbnetif->pid, dvbnetif->feedtype); 1480 if (result<0) { 1481 module_put(dvbdev->adapter->module); 1482 ret = result; 1483 goto ioctl_error; 1484 } 1485 dvbnetif->if_num=result; 1486 break; 1487 } 1488 case NET_GET_IF: 1489 { 1490 struct net_device *netdev; 1491 struct dvb_net_priv *priv_data; 1492 struct dvb_net_if *dvbnetif = parg; 1493 1494 if (dvbnetif->if_num >= DVB_NET_DEVICES_MAX || 1495 !dvbnet->state[dvbnetif->if_num]) { 1496 ret = -EINVAL; 1497 goto ioctl_error; 1498 } 1499 1500 netdev = dvbnet->device[dvbnetif->if_num]; 1501 1502 priv_data = netdev_priv(netdev); 1503 dvbnetif->pid=priv_data->pid; 1504 dvbnetif->feedtype=priv_data->feedtype; 1505 break; 1506 } 1507 case NET_REMOVE_IF: 1508 { 1509 if (!capable(CAP_SYS_ADMIN)) { 1510 ret = -EPERM; 1511 goto ioctl_error; 1512 } 1513 if ((unsigned long) parg >= DVB_NET_DEVICES_MAX) { 1514 ret = -EINVAL; 1515 goto ioctl_error; 1516 } 1517 ret = dvb_net_remove_if(dvbnet, (unsigned long) parg); 1518 if (!ret) 1519 module_put(dvbdev->adapter->module); 1520 break; 1521 } 1522 1523 /* binary compatibility cruft */ 1524 case __NET_ADD_IF_OLD: 1525 { 1526 struct __dvb_net_if_old *dvbnetif = parg; 1527 int result; 1528 1529 if (!capable(CAP_SYS_ADMIN)) { 1530 ret = -EPERM; 1531 goto ioctl_error; 1532 } 1533 1534 if (!try_module_get(dvbdev->adapter->module)) { 1535 ret = -EPERM; 1536 goto ioctl_error; 1537 } 1538 1539 result=dvb_net_add_if(dvbnet, dvbnetif->pid, DVB_NET_FEEDTYPE_MPE); 1540 if (result<0) { 1541 module_put(dvbdev->adapter->module); 1542 ret = result; 1543 goto ioctl_error; 1544 } 1545 dvbnetif->if_num=result; 1546 break; 1547 } 1548 case __NET_GET_IF_OLD: 1549 { 1550 struct net_device *netdev; 1551 struct dvb_net_priv *priv_data; 1552 struct __dvb_net_if_old *dvbnetif = parg; 1553 1554 if (dvbnetif->if_num >= DVB_NET_DEVICES_MAX || 1555 !dvbnet->state[dvbnetif->if_num]) { 1556 ret = -EINVAL; 1557 goto ioctl_error; 1558 } 1559 1560 netdev = dvbnet->device[dvbnetif->if_num]; 1561 1562 priv_data = netdev_priv(netdev); 1563 dvbnetif->pid=priv_data->pid; 1564 break; 1565 } 1566 default: 1567 ret = -ENOTTY; 1568 break; 1569 } 1570 1571 ioctl_error: 1572 mutex_unlock(&dvbnet->ioctl_mutex); 1573 return ret; 1574 } 1575 1576 static long dvb_net_ioctl(struct file *file, 1577 unsigned int cmd, unsigned long arg) 1578 { 1579 return dvb_usercopy(file, cmd, arg, dvb_net_do_ioctl); 1580 } 1581 1582 static int dvb_net_close(struct inode *inode, struct file *file) 1583 { 1584 struct dvb_device *dvbdev = file->private_data; 1585 struct dvb_net *dvbnet = dvbdev->priv; 1586 1587 dvb_generic_release(inode, file); 1588 1589 if(dvbdev->users == 1 && dvbnet->exit == 1) 1590 wake_up(&dvbdev->wait_queue); 1591 return 0; 1592 } 1593 1594 1595 static const struct file_operations dvb_net_fops = { 1596 .owner = THIS_MODULE, 1597 .unlocked_ioctl = dvb_net_ioctl, 1598 .open = dvb_generic_open, 1599 .release = dvb_net_close, 1600 .llseek = noop_llseek, 1601 }; 1602 1603 static const struct dvb_device dvbdev_net = { 1604 .priv = NULL, 1605 .users = 1, 1606 .writers = 1, 1607 #if defined(CONFIG_MEDIA_CONTROLLER_DVB) 1608 .name = "dvb-net", 1609 #endif 1610 .fops = &dvb_net_fops, 1611 }; 1612 1613 void dvb_net_release (struct dvb_net *dvbnet) 1614 { 1615 int i; 1616 1617 dvbnet->exit = 1; 1618 if (dvbnet->dvbdev->users < 1) 1619 wait_event(dvbnet->dvbdev->wait_queue, 1620 dvbnet->dvbdev->users==1); 1621 1622 dvb_unregister_device(dvbnet->dvbdev); 1623 1624 for (i=0; i<DVB_NET_DEVICES_MAX; i++) { 1625 if (!dvbnet->state[i]) 1626 continue; 1627 dvb_net_remove_if(dvbnet, i); 1628 } 1629 } 1630 EXPORT_SYMBOL(dvb_net_release); 1631 1632 1633 int dvb_net_init (struct dvb_adapter *adap, struct dvb_net *dvbnet, 1634 struct dmx_demux *dmx) 1635 { 1636 int i; 1637 1638 mutex_init(&dvbnet->ioctl_mutex); 1639 dvbnet->demux = dmx; 1640 1641 for (i=0; i<DVB_NET_DEVICES_MAX; i++) 1642 dvbnet->state[i] = 0; 1643 1644 return dvb_register_device(adap, &dvbnet->dvbdev, &dvbdev_net, 1645 dvbnet, DVB_DEVICE_NET, 0); 1646 } 1647 EXPORT_SYMBOL(dvb_net_init); 1648