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 <linux/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 } else { 723 /* dest_addr buffer is only valid if h->priv->ule_dbit == 0 */ 724 eth_zero_addr(dest_addr); 725 } 726 727 /* Handle ULE Extension Headers. */ 728 if (h->priv->ule_sndu_type < ETH_P_802_3_MIN) { 729 /* There is an extension header. Handle it accordingly. */ 730 int l = handle_ule_extensions(h->priv); 731 732 if (l < 0) { 733 /* 734 * Mandatory extension header unknown or TEST SNDU. 735 * Drop it. 736 */ 737 738 // pr_warn("Dropping SNDU, extension headers.\n" ); 739 dev_kfree_skb(h->priv->ule_skb); 740 return; 741 } 742 skb_pull(h->priv->ule_skb, l); 743 } 744 745 /* 746 * Construct/assure correct ethernet header. 747 * Note: in bridged mode (h->priv->ule_bridged != 0) 748 * we already have the (original) ethernet 749 * header at the start of the payload (after 750 * optional dest. address and any extension 751 * headers). 752 */ 753 if (!h->priv->ule_bridged) { 754 skb_push(h->priv->ule_skb, ETH_HLEN); 755 h->ethh = (struct ethhdr *)h->priv->ule_skb->data; 756 memcpy(h->ethh->h_dest, dest_addr, ETH_ALEN); 757 eth_zero_addr(h->ethh->h_source); 758 h->ethh->h_proto = htons(h->priv->ule_sndu_type); 759 } 760 /* else: skb is in correct state; nothing to do. */ 761 h->priv->ule_bridged = 0; 762 763 /* Stuff into kernel's protocol stack. */ 764 h->priv->ule_skb->protocol = dvb_net_eth_type_trans(h->priv->ule_skb, 765 h->dev); 766 /* 767 * If D-bit is set (i.e. destination MAC address not present), 768 * receive the packet anyhow. 769 */ 770 #if 0 771 if (h->priv->ule_dbit && skb->pkt_type == PACKET_OTHERHOST) 772 h->priv->ule_skb->pkt_type = PACKET_HOST; 773 #endif 774 h->dev->stats.rx_packets++; 775 h->dev->stats.rx_bytes += h->priv->ule_skb->len; 776 netif_rx(h->priv->ule_skb); 777 } 778 779 static void dvb_net_ule(struct net_device *dev, const u8 *buf, size_t buf_len) 780 { 781 int ret; 782 struct dvb_net_ule_handle h = { 783 .dev = dev, 784 .buf = buf, 785 .buf_len = buf_len, 786 .skipped = 0L, 787 .ts = NULL, 788 .ts_end = NULL, 789 .from_where = NULL, 790 .ts_remain = 0, 791 .how_much = 0, 792 .new_ts = 1, 793 .ethh = NULL, 794 .error = false, 795 #ifdef ULE_DEBUG 796 .ule_where = ule_hist, 797 #endif 798 }; 799 800 /* 801 * For all TS cells in current buffer. 802 * Appearently, we are called for every single TS cell. 803 */ 804 for (h.ts = h.buf, h.ts_end = h.buf + h.buf_len; 805 h.ts < h.ts_end; /* no incr. */) { 806 if (h.new_ts) { 807 /* We are about to process a new TS cell. */ 808 if (dvb_net_ule_new_ts_cell(&h)) 809 continue; 810 } 811 812 /* Synchronize on PUSI, if required. */ 813 if (h.priv->need_pusi) { 814 if (dvb_net_ule_ts_pusi(&h)) 815 continue; 816 } 817 818 if (h.new_ts) { 819 if (dvb_net_ule_new_ts(&h)) 820 continue; 821 } 822 823 /* Check if new payload needs to be started. */ 824 if (h.priv->ule_skb == NULL) { 825 ret = dvb_net_ule_new_payload(&h); 826 if (ret < 0) 827 return; 828 if (ret) 829 continue; 830 } 831 832 /* Copy data into our current skb. */ 833 h.how_much = min(h.priv->ule_sndu_remain, (int)h.ts_remain); 834 memcpy(skb_put(h.priv->ule_skb, h.how_much), 835 h.from_where, h.how_much); 836 h.priv->ule_sndu_remain -= h.how_much; 837 h.ts_remain -= h.how_much; 838 h.from_where += h.how_much; 839 840 /* Check for complete payload. */ 841 if (h.priv->ule_sndu_remain <= 0) { 842 /* Check CRC32, we've got it in our skb already. */ 843 __be16 ulen = htons(h.priv->ule_sndu_len); 844 __be16 utype = htons(h.priv->ule_sndu_type); 845 const u8 *tail; 846 struct kvec iov[3] = { 847 { &ulen, sizeof ulen }, 848 { &utype, sizeof utype }, 849 { h.priv->ule_skb->data, 850 h.priv->ule_skb->len - 4 } 851 }; 852 u32 ule_crc = ~0L, expected_crc; 853 if (h.priv->ule_dbit) { 854 /* Set D-bit for CRC32 verification, 855 * if it was set originally. */ 856 ulen |= htons(0x8000); 857 } 858 859 ule_crc = iov_crc32(ule_crc, iov, 3); 860 tail = skb_tail_pointer(h.priv->ule_skb); 861 expected_crc = *(tail - 4) << 24 | 862 *(tail - 3) << 16 | 863 *(tail - 2) << 8 | 864 *(tail - 1); 865 866 dvb_net_ule_check_crc(&h, ule_crc, expected_crc); 867 868 /* Prepare for next SNDU. */ 869 reset_ule(h.priv); 870 } 871 872 /* More data in current TS (look at the bytes following the CRC32)? */ 873 if (h.ts_remain >= 2 && *((unsigned short *)h.from_where) != 0xFFFF) { 874 /* Next ULE SNDU starts right there. */ 875 h.new_ts = 0; 876 h.priv->ule_skb = NULL; 877 h.priv->ule_sndu_type_1 = 0; 878 h.priv->ule_sndu_len = 0; 879 // pr_warn("More data in current TS: [%#x %#x %#x %#x]\n", 880 // *(h.from_where + 0), *(h.from_where + 1), 881 // *(h.from_where + 2), *(h.from_where + 3)); 882 // pr_warn("h.ts @ %p, stopped @ %p:\n", h.ts, h.from_where + 0); 883 // hexdump(h.ts, 188); 884 } else { 885 h.new_ts = 1; 886 h.ts += TS_SZ; 887 h.priv->ts_count++; 888 if (h.priv->ule_skb == NULL) { 889 h.priv->need_pusi = 1; 890 h.priv->ule_sndu_type_1 = 0; 891 h.priv->ule_sndu_len = 0; 892 } 893 } 894 } /* for all available TS cells */ 895 } 896 897 static int dvb_net_ts_callback(const u8 *buffer1, size_t buffer1_len, 898 const u8 *buffer2, size_t buffer2_len, 899 struct dmx_ts_feed *feed) 900 { 901 struct net_device *dev = feed->priv; 902 903 if (buffer2) 904 pr_warn("buffer2 not NULL: %p.\n", buffer2); 905 if (buffer1_len > 32768) 906 pr_warn("length > 32k: %zu.\n", buffer1_len); 907 /* pr_info("TS callback: %u bytes, %u TS cells @ %p.\n", 908 buffer1_len, buffer1_len / TS_SZ, buffer1); */ 909 dvb_net_ule(dev, buffer1, buffer1_len); 910 return 0; 911 } 912 913 914 static void dvb_net_sec(struct net_device *dev, 915 const u8 *pkt, int pkt_len) 916 { 917 u8 *eth; 918 struct sk_buff *skb; 919 struct net_device_stats *stats = &dev->stats; 920 int snap = 0; 921 922 /* note: pkt_len includes a 32bit checksum */ 923 if (pkt_len < 16) { 924 pr_warn("%s: IP/MPE packet length = %d too small.\n", 925 dev->name, pkt_len); 926 stats->rx_errors++; 927 stats->rx_length_errors++; 928 return; 929 } 930 /* it seems some ISPs manage to screw up here, so we have to 931 * relax the error checks... */ 932 #if 0 933 if ((pkt[5] & 0xfd) != 0xc1) { 934 /* drop scrambled or broken packets */ 935 #else 936 if ((pkt[5] & 0x3c) != 0x00) { 937 /* drop scrambled */ 938 #endif 939 stats->rx_errors++; 940 stats->rx_crc_errors++; 941 return; 942 } 943 if (pkt[5] & 0x02) { 944 /* handle LLC/SNAP, see rfc-1042 */ 945 if (pkt_len < 24 || memcmp(&pkt[12], "\xaa\xaa\x03\0\0\0", 6)) { 946 stats->rx_dropped++; 947 return; 948 } 949 snap = 8; 950 } 951 if (pkt[7]) { 952 /* FIXME: assemble datagram from multiple sections */ 953 stats->rx_errors++; 954 stats->rx_frame_errors++; 955 return; 956 } 957 958 /* we have 14 byte ethernet header (ip header follows); 959 * 12 byte MPE header; 4 byte checksum; + 2 byte alignment, 8 byte LLC/SNAP 960 */ 961 if (!(skb = dev_alloc_skb(pkt_len - 4 - 12 + 14 + 2 - snap))) { 962 //pr_notice("%s: Memory squeeze, dropping packet.\n", dev->name); 963 stats->rx_dropped++; 964 return; 965 } 966 skb_reserve(skb, 2); /* longword align L3 header */ 967 skb->dev = dev; 968 969 /* copy L3 payload */ 970 eth = (u8 *) skb_put(skb, pkt_len - 12 - 4 + 14 - snap); 971 memcpy(eth + 14, pkt + 12 + snap, pkt_len - 12 - 4 - snap); 972 973 /* create ethernet header: */ 974 eth[0]=pkt[0x0b]; 975 eth[1]=pkt[0x0a]; 976 eth[2]=pkt[0x09]; 977 eth[3]=pkt[0x08]; 978 eth[4]=pkt[0x04]; 979 eth[5]=pkt[0x03]; 980 981 eth[6]=eth[7]=eth[8]=eth[9]=eth[10]=eth[11]=0; 982 983 if (snap) { 984 eth[12] = pkt[18]; 985 eth[13] = pkt[19]; 986 } else { 987 /* protocol numbers are from rfc-1700 or 988 * http://www.iana.org/assignments/ethernet-numbers 989 */ 990 if (pkt[12] >> 4 == 6) { /* version field from IP header */ 991 eth[12] = 0x86; /* IPv6 */ 992 eth[13] = 0xdd; 993 } else { 994 eth[12] = 0x08; /* IPv4 */ 995 eth[13] = 0x00; 996 } 997 } 998 999 skb->protocol = dvb_net_eth_type_trans(skb, dev); 1000 1001 stats->rx_packets++; 1002 stats->rx_bytes+=skb->len; 1003 netif_rx(skb); 1004 } 1005 1006 static int dvb_net_sec_callback(const u8 *buffer1, size_t buffer1_len, 1007 const u8 *buffer2, size_t buffer2_len, 1008 struct dmx_section_filter *filter) 1009 { 1010 struct net_device *dev = filter->priv; 1011 1012 /** 1013 * we rely on the DVB API definition where exactly one complete 1014 * section is delivered in buffer1 1015 */ 1016 dvb_net_sec (dev, buffer1, buffer1_len); 1017 return 0; 1018 } 1019 1020 static int dvb_net_tx(struct sk_buff *skb, struct net_device *dev) 1021 { 1022 dev_kfree_skb(skb); 1023 return NETDEV_TX_OK; 1024 } 1025 1026 static u8 mask_normal[6]={0xff, 0xff, 0xff, 0xff, 0xff, 0xff}; 1027 static u8 mask_allmulti[6]={0xff, 0xff, 0xff, 0x00, 0x00, 0x00}; 1028 static u8 mac_allmulti[6]={0x01, 0x00, 0x5e, 0x00, 0x00, 0x00}; 1029 static u8 mask_promisc[6]={0x00, 0x00, 0x00, 0x00, 0x00, 0x00}; 1030 1031 static int dvb_net_filter_sec_set(struct net_device *dev, 1032 struct dmx_section_filter **secfilter, 1033 u8 *mac, u8 *mac_mask) 1034 { 1035 struct dvb_net_priv *priv = netdev_priv(dev); 1036 int ret; 1037 1038 *secfilter=NULL; 1039 ret = priv->secfeed->allocate_filter(priv->secfeed, secfilter); 1040 if (ret<0) { 1041 pr_err("%s: could not get filter\n", dev->name); 1042 return ret; 1043 } 1044 1045 (*secfilter)->priv=(void *) dev; 1046 1047 memset((*secfilter)->filter_value, 0x00, DMX_MAX_FILTER_SIZE); 1048 memset((*secfilter)->filter_mask, 0x00, DMX_MAX_FILTER_SIZE); 1049 memset((*secfilter)->filter_mode, 0xff, DMX_MAX_FILTER_SIZE); 1050 1051 (*secfilter)->filter_value[0]=0x3e; 1052 (*secfilter)->filter_value[3]=mac[5]; 1053 (*secfilter)->filter_value[4]=mac[4]; 1054 (*secfilter)->filter_value[8]=mac[3]; 1055 (*secfilter)->filter_value[9]=mac[2]; 1056 (*secfilter)->filter_value[10]=mac[1]; 1057 (*secfilter)->filter_value[11]=mac[0]; 1058 1059 (*secfilter)->filter_mask[0] = 0xff; 1060 (*secfilter)->filter_mask[3] = mac_mask[5]; 1061 (*secfilter)->filter_mask[4] = mac_mask[4]; 1062 (*secfilter)->filter_mask[8] = mac_mask[3]; 1063 (*secfilter)->filter_mask[9] = mac_mask[2]; 1064 (*secfilter)->filter_mask[10] = mac_mask[1]; 1065 (*secfilter)->filter_mask[11]=mac_mask[0]; 1066 1067 netdev_dbg(dev, "filter mac=%pM mask=%pM\n", mac, mac_mask); 1068 1069 return 0; 1070 } 1071 1072 static int dvb_net_feed_start(struct net_device *dev) 1073 { 1074 int ret = 0, i; 1075 struct dvb_net_priv *priv = netdev_priv(dev); 1076 struct dmx_demux *demux = priv->demux; 1077 unsigned char *mac = (unsigned char *) dev->dev_addr; 1078 1079 netdev_dbg(dev, "rx_mode %i\n", priv->rx_mode); 1080 mutex_lock(&priv->mutex); 1081 if (priv->tsfeed || priv->secfeed || priv->secfilter || priv->multi_secfilter[0]) 1082 pr_err("%s: BUG %d\n", __func__, __LINE__); 1083 1084 priv->secfeed=NULL; 1085 priv->secfilter=NULL; 1086 priv->tsfeed = NULL; 1087 1088 if (priv->feedtype == DVB_NET_FEEDTYPE_MPE) { 1089 netdev_dbg(dev, "alloc secfeed\n"); 1090 ret=demux->allocate_section_feed(demux, &priv->secfeed, 1091 dvb_net_sec_callback); 1092 if (ret<0) { 1093 pr_err("%s: could not allocate section feed\n", 1094 dev->name); 1095 goto error; 1096 } 1097 1098 ret = priv->secfeed->set(priv->secfeed, priv->pid, 1); 1099 1100 if (ret<0) { 1101 pr_err("%s: could not set section feed\n", dev->name); 1102 priv->demux->release_section_feed(priv->demux, priv->secfeed); 1103 priv->secfeed=NULL; 1104 goto error; 1105 } 1106 1107 if (priv->rx_mode != RX_MODE_PROMISC) { 1108 netdev_dbg(dev, "set secfilter\n"); 1109 dvb_net_filter_sec_set(dev, &priv->secfilter, mac, mask_normal); 1110 } 1111 1112 switch (priv->rx_mode) { 1113 case RX_MODE_MULTI: 1114 for (i = 0; i < priv->multi_num; i++) { 1115 netdev_dbg(dev, "set multi_secfilter[%d]\n", i); 1116 dvb_net_filter_sec_set(dev, &priv->multi_secfilter[i], 1117 priv->multi_macs[i], mask_normal); 1118 } 1119 break; 1120 case RX_MODE_ALL_MULTI: 1121 priv->multi_num=1; 1122 netdev_dbg(dev, "set multi_secfilter[0]\n"); 1123 dvb_net_filter_sec_set(dev, &priv->multi_secfilter[0], 1124 mac_allmulti, mask_allmulti); 1125 break; 1126 case RX_MODE_PROMISC: 1127 priv->multi_num=0; 1128 netdev_dbg(dev, "set secfilter\n"); 1129 dvb_net_filter_sec_set(dev, &priv->secfilter, mac, mask_promisc); 1130 break; 1131 } 1132 1133 netdev_dbg(dev, "start filtering\n"); 1134 priv->secfeed->start_filtering(priv->secfeed); 1135 } else if (priv->feedtype == DVB_NET_FEEDTYPE_ULE) { 1136 ktime_t timeout = ns_to_ktime(10 * NSEC_PER_MSEC); 1137 1138 /* we have payloads encapsulated in TS */ 1139 netdev_dbg(dev, "alloc tsfeed\n"); 1140 ret = demux->allocate_ts_feed(demux, &priv->tsfeed, dvb_net_ts_callback); 1141 if (ret < 0) { 1142 pr_err("%s: could not allocate ts feed\n", dev->name); 1143 goto error; 1144 } 1145 1146 /* Set netdevice pointer for ts decaps callback. */ 1147 priv->tsfeed->priv = (void *)dev; 1148 ret = priv->tsfeed->set(priv->tsfeed, 1149 priv->pid, /* pid */ 1150 TS_PACKET, /* type */ 1151 DMX_PES_OTHER, /* pes type */ 1152 timeout /* timeout */ 1153 ); 1154 1155 if (ret < 0) { 1156 pr_err("%s: could not set ts feed\n", dev->name); 1157 priv->demux->release_ts_feed(priv->demux, priv->tsfeed); 1158 priv->tsfeed = NULL; 1159 goto error; 1160 } 1161 1162 netdev_dbg(dev, "start filtering\n"); 1163 priv->tsfeed->start_filtering(priv->tsfeed); 1164 } else 1165 ret = -EINVAL; 1166 1167 error: 1168 mutex_unlock(&priv->mutex); 1169 return ret; 1170 } 1171 1172 static int dvb_net_feed_stop(struct net_device *dev) 1173 { 1174 struct dvb_net_priv *priv = netdev_priv(dev); 1175 int i, ret = 0; 1176 1177 mutex_lock(&priv->mutex); 1178 if (priv->feedtype == DVB_NET_FEEDTYPE_MPE) { 1179 if (priv->secfeed) { 1180 if (priv->secfeed->is_filtering) { 1181 netdev_dbg(dev, "stop secfeed\n"); 1182 priv->secfeed->stop_filtering(priv->secfeed); 1183 } 1184 1185 if (priv->secfilter) { 1186 netdev_dbg(dev, "release secfilter\n"); 1187 priv->secfeed->release_filter(priv->secfeed, 1188 priv->secfilter); 1189 priv->secfilter=NULL; 1190 } 1191 1192 for (i=0; i<priv->multi_num; i++) { 1193 if (priv->multi_secfilter[i]) { 1194 netdev_dbg(dev, "release multi_filter[%d]\n", 1195 i); 1196 priv->secfeed->release_filter(priv->secfeed, 1197 priv->multi_secfilter[i]); 1198 priv->multi_secfilter[i] = NULL; 1199 } 1200 } 1201 1202 priv->demux->release_section_feed(priv->demux, priv->secfeed); 1203 priv->secfeed = NULL; 1204 } else 1205 pr_err("%s: no feed to stop\n", dev->name); 1206 } else if (priv->feedtype == DVB_NET_FEEDTYPE_ULE) { 1207 if (priv->tsfeed) { 1208 if (priv->tsfeed->is_filtering) { 1209 netdev_dbg(dev, "stop tsfeed\n"); 1210 priv->tsfeed->stop_filtering(priv->tsfeed); 1211 } 1212 priv->demux->release_ts_feed(priv->demux, priv->tsfeed); 1213 priv->tsfeed = NULL; 1214 } 1215 else 1216 pr_err("%s: no ts feed to stop\n", dev->name); 1217 } else 1218 ret = -EINVAL; 1219 mutex_unlock(&priv->mutex); 1220 return ret; 1221 } 1222 1223 1224 static int dvb_set_mc_filter(struct net_device *dev, unsigned char *addr) 1225 { 1226 struct dvb_net_priv *priv = netdev_priv(dev); 1227 1228 if (priv->multi_num == DVB_NET_MULTICAST_MAX) 1229 return -ENOMEM; 1230 1231 memcpy(priv->multi_macs[priv->multi_num], addr, ETH_ALEN); 1232 1233 priv->multi_num++; 1234 return 0; 1235 } 1236 1237 1238 static void wq_set_multicast_list (struct work_struct *work) 1239 { 1240 struct dvb_net_priv *priv = 1241 container_of(work, struct dvb_net_priv, set_multicast_list_wq); 1242 struct net_device *dev = priv->net; 1243 1244 dvb_net_feed_stop(dev); 1245 priv->rx_mode = RX_MODE_UNI; 1246 netif_addr_lock_bh(dev); 1247 1248 if (dev->flags & IFF_PROMISC) { 1249 netdev_dbg(dev, "promiscuous mode\n"); 1250 priv->rx_mode = RX_MODE_PROMISC; 1251 } else if ((dev->flags & IFF_ALLMULTI)) { 1252 netdev_dbg(dev, "allmulti mode\n"); 1253 priv->rx_mode = RX_MODE_ALL_MULTI; 1254 } else if (!netdev_mc_empty(dev)) { 1255 struct netdev_hw_addr *ha; 1256 1257 netdev_dbg(dev, "set_mc_list, %d entries\n", 1258 netdev_mc_count(dev)); 1259 1260 priv->rx_mode = RX_MODE_MULTI; 1261 priv->multi_num = 0; 1262 1263 netdev_for_each_mc_addr(ha, dev) 1264 dvb_set_mc_filter(dev, ha->addr); 1265 } 1266 1267 netif_addr_unlock_bh(dev); 1268 dvb_net_feed_start(dev); 1269 } 1270 1271 1272 static void dvb_net_set_multicast_list (struct net_device *dev) 1273 { 1274 struct dvb_net_priv *priv = netdev_priv(dev); 1275 schedule_work(&priv->set_multicast_list_wq); 1276 } 1277 1278 1279 static void wq_restart_net_feed (struct work_struct *work) 1280 { 1281 struct dvb_net_priv *priv = 1282 container_of(work, struct dvb_net_priv, restart_net_feed_wq); 1283 struct net_device *dev = priv->net; 1284 1285 if (netif_running(dev)) { 1286 dvb_net_feed_stop(dev); 1287 dvb_net_feed_start(dev); 1288 } 1289 } 1290 1291 1292 static int dvb_net_set_mac (struct net_device *dev, void *p) 1293 { 1294 struct dvb_net_priv *priv = netdev_priv(dev); 1295 struct sockaddr *addr=p; 1296 1297 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len); 1298 1299 if (netif_running(dev)) 1300 schedule_work(&priv->restart_net_feed_wq); 1301 1302 return 0; 1303 } 1304 1305 1306 static int dvb_net_open(struct net_device *dev) 1307 { 1308 struct dvb_net_priv *priv = netdev_priv(dev); 1309 1310 priv->in_use++; 1311 dvb_net_feed_start(dev); 1312 return 0; 1313 } 1314 1315 1316 static int dvb_net_stop(struct net_device *dev) 1317 { 1318 struct dvb_net_priv *priv = netdev_priv(dev); 1319 1320 priv->in_use--; 1321 return dvb_net_feed_stop(dev); 1322 } 1323 1324 static const struct header_ops dvb_header_ops = { 1325 .create = eth_header, 1326 .parse = eth_header_parse, 1327 }; 1328 1329 1330 static const struct net_device_ops dvb_netdev_ops = { 1331 .ndo_open = dvb_net_open, 1332 .ndo_stop = dvb_net_stop, 1333 .ndo_start_xmit = dvb_net_tx, 1334 .ndo_set_rx_mode = dvb_net_set_multicast_list, 1335 .ndo_set_mac_address = dvb_net_set_mac, 1336 .ndo_validate_addr = eth_validate_addr, 1337 }; 1338 1339 static void dvb_net_setup(struct net_device *dev) 1340 { 1341 ether_setup(dev); 1342 1343 dev->header_ops = &dvb_header_ops; 1344 dev->netdev_ops = &dvb_netdev_ops; 1345 dev->mtu = 4096; 1346 dev->max_mtu = 4096; 1347 1348 dev->flags |= IFF_NOARP; 1349 } 1350 1351 static int get_if(struct dvb_net *dvbnet) 1352 { 1353 int i; 1354 1355 for (i=0; i<DVB_NET_DEVICES_MAX; i++) 1356 if (!dvbnet->state[i]) 1357 break; 1358 1359 if (i == DVB_NET_DEVICES_MAX) 1360 return -1; 1361 1362 dvbnet->state[i]=1; 1363 return i; 1364 } 1365 1366 static int dvb_net_add_if(struct dvb_net *dvbnet, u16 pid, u8 feedtype) 1367 { 1368 struct net_device *net; 1369 struct dvb_net_priv *priv; 1370 int result; 1371 int if_num; 1372 1373 if (feedtype != DVB_NET_FEEDTYPE_MPE && feedtype != DVB_NET_FEEDTYPE_ULE) 1374 return -EINVAL; 1375 if ((if_num = get_if(dvbnet)) < 0) 1376 return -EINVAL; 1377 1378 net = alloc_netdev(sizeof(struct dvb_net_priv), "dvb", 1379 NET_NAME_UNKNOWN, dvb_net_setup); 1380 if (!net) 1381 return -ENOMEM; 1382 1383 if (dvbnet->dvbdev->id) 1384 snprintf(net->name, IFNAMSIZ, "dvb%d%u%d", 1385 dvbnet->dvbdev->adapter->num, dvbnet->dvbdev->id, if_num); 1386 else 1387 /* compatibility fix to keep dvb0_0 format */ 1388 snprintf(net->name, IFNAMSIZ, "dvb%d_%d", 1389 dvbnet->dvbdev->adapter->num, if_num); 1390 1391 net->addr_len = 6; 1392 memcpy(net->dev_addr, dvbnet->dvbdev->adapter->proposed_mac, 6); 1393 1394 dvbnet->device[if_num] = net; 1395 1396 priv = netdev_priv(net); 1397 priv->net = net; 1398 priv->demux = dvbnet->demux; 1399 priv->pid = pid; 1400 priv->rx_mode = RX_MODE_UNI; 1401 priv->need_pusi = 1; 1402 priv->tscc = 0; 1403 priv->feedtype = feedtype; 1404 reset_ule(priv); 1405 1406 INIT_WORK(&priv->set_multicast_list_wq, wq_set_multicast_list); 1407 INIT_WORK(&priv->restart_net_feed_wq, wq_restart_net_feed); 1408 mutex_init(&priv->mutex); 1409 1410 net->base_addr = pid; 1411 1412 if ((result = register_netdev(net)) < 0) { 1413 dvbnet->device[if_num] = NULL; 1414 free_netdev(net); 1415 return result; 1416 } 1417 pr_info("created network interface %s\n", net->name); 1418 1419 return if_num; 1420 } 1421 1422 static int dvb_net_remove_if(struct dvb_net *dvbnet, unsigned long num) 1423 { 1424 struct net_device *net = dvbnet->device[num]; 1425 struct dvb_net_priv *priv; 1426 1427 if (!dvbnet->state[num]) 1428 return -EINVAL; 1429 priv = netdev_priv(net); 1430 if (priv->in_use) 1431 return -EBUSY; 1432 1433 dvb_net_stop(net); 1434 flush_work(&priv->set_multicast_list_wq); 1435 flush_work(&priv->restart_net_feed_wq); 1436 pr_info("removed network interface %s\n", net->name); 1437 unregister_netdev(net); 1438 dvbnet->state[num]=0; 1439 dvbnet->device[num] = NULL; 1440 free_netdev(net); 1441 1442 return 0; 1443 } 1444 1445 static int dvb_net_do_ioctl(struct file *file, 1446 unsigned int cmd, void *parg) 1447 { 1448 struct dvb_device *dvbdev = file->private_data; 1449 struct dvb_net *dvbnet = dvbdev->priv; 1450 int ret = 0; 1451 1452 if (((file->f_flags&O_ACCMODE)==O_RDONLY)) 1453 return -EPERM; 1454 1455 if (mutex_lock_interruptible(&dvbnet->ioctl_mutex)) 1456 return -ERESTARTSYS; 1457 1458 switch (cmd) { 1459 case NET_ADD_IF: 1460 { 1461 struct dvb_net_if *dvbnetif = parg; 1462 int result; 1463 1464 if (!capable(CAP_SYS_ADMIN)) { 1465 ret = -EPERM; 1466 goto ioctl_error; 1467 } 1468 1469 if (!try_module_get(dvbdev->adapter->module)) { 1470 ret = -EPERM; 1471 goto ioctl_error; 1472 } 1473 1474 result=dvb_net_add_if(dvbnet, dvbnetif->pid, dvbnetif->feedtype); 1475 if (result<0) { 1476 module_put(dvbdev->adapter->module); 1477 ret = result; 1478 goto ioctl_error; 1479 } 1480 dvbnetif->if_num=result; 1481 break; 1482 } 1483 case NET_GET_IF: 1484 { 1485 struct net_device *netdev; 1486 struct dvb_net_priv *priv_data; 1487 struct dvb_net_if *dvbnetif = parg; 1488 1489 if (dvbnetif->if_num >= DVB_NET_DEVICES_MAX || 1490 !dvbnet->state[dvbnetif->if_num]) { 1491 ret = -EINVAL; 1492 goto ioctl_error; 1493 } 1494 1495 netdev = dvbnet->device[dvbnetif->if_num]; 1496 1497 priv_data = netdev_priv(netdev); 1498 dvbnetif->pid=priv_data->pid; 1499 dvbnetif->feedtype=priv_data->feedtype; 1500 break; 1501 } 1502 case NET_REMOVE_IF: 1503 { 1504 if (!capable(CAP_SYS_ADMIN)) { 1505 ret = -EPERM; 1506 goto ioctl_error; 1507 } 1508 if ((unsigned long) parg >= DVB_NET_DEVICES_MAX) { 1509 ret = -EINVAL; 1510 goto ioctl_error; 1511 } 1512 ret = dvb_net_remove_if(dvbnet, (unsigned long) parg); 1513 if (!ret) 1514 module_put(dvbdev->adapter->module); 1515 break; 1516 } 1517 1518 /* binary compatibility cruft */ 1519 case __NET_ADD_IF_OLD: 1520 { 1521 struct __dvb_net_if_old *dvbnetif = parg; 1522 int result; 1523 1524 if (!capable(CAP_SYS_ADMIN)) { 1525 ret = -EPERM; 1526 goto ioctl_error; 1527 } 1528 1529 if (!try_module_get(dvbdev->adapter->module)) { 1530 ret = -EPERM; 1531 goto ioctl_error; 1532 } 1533 1534 result=dvb_net_add_if(dvbnet, dvbnetif->pid, DVB_NET_FEEDTYPE_MPE); 1535 if (result<0) { 1536 module_put(dvbdev->adapter->module); 1537 ret = result; 1538 goto ioctl_error; 1539 } 1540 dvbnetif->if_num=result; 1541 break; 1542 } 1543 case __NET_GET_IF_OLD: 1544 { 1545 struct net_device *netdev; 1546 struct dvb_net_priv *priv_data; 1547 struct __dvb_net_if_old *dvbnetif = parg; 1548 1549 if (dvbnetif->if_num >= DVB_NET_DEVICES_MAX || 1550 !dvbnet->state[dvbnetif->if_num]) { 1551 ret = -EINVAL; 1552 goto ioctl_error; 1553 } 1554 1555 netdev = dvbnet->device[dvbnetif->if_num]; 1556 1557 priv_data = netdev_priv(netdev); 1558 dvbnetif->pid=priv_data->pid; 1559 break; 1560 } 1561 default: 1562 ret = -ENOTTY; 1563 break; 1564 } 1565 1566 ioctl_error: 1567 mutex_unlock(&dvbnet->ioctl_mutex); 1568 return ret; 1569 } 1570 1571 static long dvb_net_ioctl(struct file *file, 1572 unsigned int cmd, unsigned long arg) 1573 { 1574 return dvb_usercopy(file, cmd, arg, dvb_net_do_ioctl); 1575 } 1576 1577 static int dvb_net_close(struct inode *inode, struct file *file) 1578 { 1579 struct dvb_device *dvbdev = file->private_data; 1580 struct dvb_net *dvbnet = dvbdev->priv; 1581 1582 dvb_generic_release(inode, file); 1583 1584 if(dvbdev->users == 1 && dvbnet->exit == 1) 1585 wake_up(&dvbdev->wait_queue); 1586 return 0; 1587 } 1588 1589 1590 static const struct file_operations dvb_net_fops = { 1591 .owner = THIS_MODULE, 1592 .unlocked_ioctl = dvb_net_ioctl, 1593 .open = dvb_generic_open, 1594 .release = dvb_net_close, 1595 .llseek = noop_llseek, 1596 }; 1597 1598 static const struct dvb_device dvbdev_net = { 1599 .priv = NULL, 1600 .users = 1, 1601 .writers = 1, 1602 #if defined(CONFIG_MEDIA_CONTROLLER_DVB) 1603 .name = "dvb-net", 1604 #endif 1605 .fops = &dvb_net_fops, 1606 }; 1607 1608 void dvb_net_release (struct dvb_net *dvbnet) 1609 { 1610 int i; 1611 1612 dvbnet->exit = 1; 1613 if (dvbnet->dvbdev->users < 1) 1614 wait_event(dvbnet->dvbdev->wait_queue, 1615 dvbnet->dvbdev->users==1); 1616 1617 dvb_unregister_device(dvbnet->dvbdev); 1618 1619 for (i=0; i<DVB_NET_DEVICES_MAX; i++) { 1620 if (!dvbnet->state[i]) 1621 continue; 1622 dvb_net_remove_if(dvbnet, i); 1623 } 1624 } 1625 EXPORT_SYMBOL(dvb_net_release); 1626 1627 1628 int dvb_net_init (struct dvb_adapter *adap, struct dvb_net *dvbnet, 1629 struct dmx_demux *dmx) 1630 { 1631 int i; 1632 1633 mutex_init(&dvbnet->ioctl_mutex); 1634 dvbnet->demux = dmx; 1635 1636 for (i=0; i<DVB_NET_DEVICES_MAX; i++) 1637 dvbnet->state[i] = 0; 1638 1639 return dvb_register_device(adap, &dvbnet->dvbdev, &dvbdev_net, 1640 dvbnet, DVB_DEVICE_NET, 0); 1641 } 1642 EXPORT_SYMBOL(dvb_net_init); 1643