4 * Copyright (C) 2001 Convergence integrated media GmbH
5 * Ralph Metzler <ralph@convergence.de>
6 * Copyright (C) 2002 Ralph Metzler <rjkm@metzlerbros.de>
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>
15 * ULE Decaps according to RFC 4326.
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.
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.
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
35 * Feb 2004: hl/ws v1: Implementing draft-fair-ipdvb-ule-01.txt
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.
51 * FIXME / TODO (dvb_net.c):
53 * Unloading does not work for 2.6.9 kernels: a refcount doesn't go to zero.
57 #include <linux/module.h>
58 #include <linux/kernel.h>
59 #include <linux/netdevice.h>
60 #include <linux/etherdevice.h>
61 #include <linux/dvb/net.h>
62 #include <linux/smp_lock.h>
63 #include <linux/uio.h>
64 #include <asm/uaccess.h>
65 #include <linux/crc32.h>
66 #include <linux/mutex.h>
67 #include <linux/sched.h>
69 #include "dvb_demux.h"
72 static int dvb_net_debug;
73 module_param(dvb_net_debug, int, 0444);
74 MODULE_PARM_DESC(dvb_net_debug, "enable debug messages");
76 #define dprintk(x...) do { if (dvb_net_debug) printk(x); } while (0)
79 static inline __u32 iov_crc32( __u32 c, struct kvec *iov, unsigned int cnt )
82 for (j = 0; j < cnt; j++)
83 c = crc32_be( c, iov[j].iov_base, iov[j].iov_len );
88 #define DVB_NET_MULTICAST_MAX 10
94 #define MAC_ADDR_PRINTFMT "%.2x:%.2x:%.2x:%.2x:%.2x:%.2x"
95 #define MAX_ADDR_PRINTFMT_ARGS(macap) (macap)[0],(macap)[1],(macap)[2],(macap)[3],(macap)[4],(macap)[5]
97 #define isprint(c) ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || (c >= '0' && c <= '9'))
99 static void hexdump( const unsigned char *buf, unsigned short len )
101 char str[80], octet[10];
104 for (ofs = 0; ofs < len; ofs += 16) {
105 sprintf( str, "%03d: ", ofs );
107 for (i = 0; i < 16; i++) {
109 sprintf( octet, "%02x ", buf[ofs + i] );
111 strcpy( octet, " " );
113 strcat( str, octet );
118 for (i = 0; (i < 16) && ((i + ofs) < len); i++)
119 str[l++] = isprint( buf[ofs + i] ) ? buf[ofs + i] : '.';
122 printk( KERN_WARNING "%s\n", str );
128 struct dvb_net_priv {
131 struct net_device *net;
132 struct dvb_net *host;
133 struct dmx_demux *demux;
134 struct dmx_section_feed *secfeed;
135 struct dmx_section_filter *secfilter;
136 struct dmx_ts_feed *tsfeed;
138 struct dmx_section_filter *multi_secfilter[DVB_NET_MULTICAST_MAX];
139 unsigned char multi_macs[DVB_NET_MULTICAST_MAX][6];
141 #define RX_MODE_UNI 0
142 #define RX_MODE_MULTI 1
143 #define RX_MODE_ALL_MULTI 2
144 #define RX_MODE_PROMISC 3
145 struct work_struct set_multicast_list_wq;
146 struct work_struct restart_net_feed_wq;
147 unsigned char feedtype; /* Either FEED_TYPE_ or FEED_TYPE_ULE */
148 int need_pusi; /* Set to 1, if synchronization on PUSI required. */
149 unsigned char tscc; /* TS continuity counter after sync on PUSI. */
150 struct sk_buff *ule_skb; /* ULE SNDU decodes into this buffer. */
151 unsigned char *ule_next_hdr; /* Pointer into skb to next ULE extension header. */
152 unsigned short ule_sndu_len; /* ULE SNDU length in bytes, w/o D-Bit. */
153 unsigned short ule_sndu_type; /* ULE SNDU type field, complete. */
154 unsigned char ule_sndu_type_1; /* ULE SNDU type field, if split across 2 TS cells. */
155 unsigned char ule_dbit; /* Whether the DestMAC address present
156 * or not (bit is set). */
157 unsigned char ule_bridged; /* Whether the ULE_BRIDGED extension header was found. */
158 int ule_sndu_remain; /* Nr. of bytes still required for current ULE SNDU. */
159 unsigned long ts_count; /* Current ts cell counter. */
165 * Determine the packet's protocol ID. The rule here is that we
166 * assume 802.3 if the type field is short enough to be a length.
167 * This is normal practice and works for any 'now in use' protocol.
169 * stolen from eth.c out of the linux kernel, hacked for dvb-device
170 * by Michael Holzt <kju@debian.org>
172 static __be16 dvb_net_eth_type_trans(struct sk_buff *skb,
173 struct net_device *dev)
178 skb_reset_mac_header(skb);
179 skb_pull(skb,dev->hard_header_len);
182 if (*eth->h_dest & 1) {
183 if(memcmp(eth->h_dest,dev->broadcast, ETH_ALEN)==0)
184 skb->pkt_type=PACKET_BROADCAST;
186 skb->pkt_type=PACKET_MULTICAST;
189 if (ntohs(eth->h_proto) >= 1536)
195 * This is a magic hack to spot IPX packets. Older Novell breaks
196 * the protocol design and runs IPX over 802.3 without an 802.2 LLC
197 * layer. We look for FFFF which isn't a used 802.2 SSAP/DSAP. This
198 * won't work for fault tolerant netware but does for the rest.
200 if (*(unsigned short *)rawp == 0xFFFF)
201 return htons(ETH_P_802_3);
206 return htons(ETH_P_802_2);
217 /* ULE Extension Header handlers. */
220 #define ULE_BRIDGED 1
222 #define ULE_OPTEXTHDR_PADDING 0
224 static int ule_test_sndu( struct dvb_net_priv *p )
229 static int ule_bridged_sndu( struct dvb_net_priv *p )
231 struct ethhdr *hdr = (struct ethhdr*) p->ule_next_hdr;
232 if(ntohs(hdr->h_proto) < 1536) {
233 int framelen = p->ule_sndu_len - ((p->ule_next_hdr+sizeof(struct ethhdr)) - p->ule_skb->data);
234 /* A frame Type < 1536 for a bridged frame, introduces a LLC Length field. */
235 if(framelen != ntohs(hdr->h_proto)) {
241 * "A bridged SNDU is a Mandatory Extension Header of Type 1.
242 * It must be the final (or only) extension header specified in the header chain of a SNDU."
243 * The 'ule_bridged' flag will cause the extension header processing loop to terminate.
249 static int ule_exthdr_padding(struct dvb_net_priv *p)
254 /** Handle ULE extension headers.
255 * Function is called after a successful CRC32 verification of an ULE SNDU to complete its decoding.
256 * Returns: >= 0: nr. of bytes consumed by next extension header
257 * -1: Mandatory extension header that is not recognized or TEST SNDU; discard.
259 static int handle_one_ule_extension( struct dvb_net_priv *p )
261 /* Table of mandatory extension header handlers. The header type is the index. */
262 static int (*ule_mandatory_ext_handlers[255])( struct dvb_net_priv *p ) =
263 { [0] = ule_test_sndu, [1] = ule_bridged_sndu, [2] = NULL, };
265 /* Table of optional extension header handlers. The header type is the index. */
266 static int (*ule_optional_ext_handlers[255])( struct dvb_net_priv *p ) =
267 { [0] = ule_exthdr_padding, [1] = NULL, };
270 unsigned char hlen = (p->ule_sndu_type & 0x0700) >> 8;
271 unsigned char htype = p->ule_sndu_type & 0x00FF;
273 /* Discriminate mandatory and optional extension headers. */
275 /* Mandatory extension header */
276 if (ule_mandatory_ext_handlers[htype]) {
277 ext_len = ule_mandatory_ext_handlers[htype]( p );
279 p->ule_next_hdr += ext_len;
280 if (!p->ule_bridged) {
281 p->ule_sndu_type = ntohs(*(__be16 *)p->ule_next_hdr);
282 p->ule_next_hdr += 2;
284 p->ule_sndu_type = ntohs(*(__be16 *)(p->ule_next_hdr + ((p->ule_dbit ? 2 : 3) * ETH_ALEN)));
285 /* This assures the extension handling loop will terminate. */
288 // else: extension handler failed or SNDU should be discarded
290 ext_len = -1; /* SNDU has to be discarded. */
292 /* Optional extension header. Calculate the length. */
294 /* Process the optional extension header according to its type. */
295 if (ule_optional_ext_handlers[htype])
296 (void)ule_optional_ext_handlers[htype]( p );
297 p->ule_next_hdr += ext_len;
298 p->ule_sndu_type = ntohs( *(__be16 *)(p->ule_next_hdr-2) );
300 * note: the length of the next header type is included in the
301 * length of THIS optional extension header
308 static int handle_ule_extensions( struct dvb_net_priv *p )
310 int total_ext_len = 0, l;
312 p->ule_next_hdr = p->ule_skb->data;
314 l = handle_one_ule_extension( p );
316 return l; /* Stop extension header processing and discard SNDU. */
319 dprintk("handle_ule_extensions: ule_next_hdr=%p, ule_sndu_type=%i, "
320 "l=%i, total_ext_len=%i\n", p->ule_next_hdr,
321 (int) p->ule_sndu_type, l, total_ext_len);
324 } while (p->ule_sndu_type < 1536);
326 return total_ext_len;
330 /** Prepare for a new ULE SNDU: reset the decoder state. */
331 static inline void reset_ule( struct dvb_net_priv *p )
334 p->ule_next_hdr = NULL;
336 p->ule_sndu_type = 0;
337 p->ule_sndu_type_1 = 0;
338 p->ule_sndu_remain = 0;
344 * Decode ULE SNDUs according to draft-ietf-ipdvb-ule-03.txt from a sequence of
345 * TS cells of a single PID.
347 static void dvb_net_ule( struct net_device *dev, const u8 *buf, size_t buf_len )
349 struct dvb_net_priv *priv = netdev_priv(dev);
350 unsigned long skipped = 0L;
351 const u8 *ts, *ts_end, *from_where = NULL;
352 u8 ts_remain = 0, how_much = 0, new_ts = 1;
353 struct ethhdr *ethh = NULL;
356 /* The code inside ULE_DEBUG keeps a history of the last 100 TS cells processed. */
357 static unsigned char ule_hist[100*TS_SZ];
358 static unsigned char *ule_where = ule_hist, ule_dump;
361 /* For all TS cells in current buffer.
362 * Appearently, we are called for every single TS cell.
364 for (ts = buf, ts_end = buf + buf_len; ts < ts_end; /* no default incr. */ ) {
367 /* We are about to process a new TS cell. */
370 if (ule_where >= &ule_hist[100*TS_SZ]) ule_where = ule_hist;
371 memcpy( ule_where, ts, TS_SZ );
373 hexdump( ule_where, TS_SZ );
379 /* Check TS error conditions: sync_byte, transport_error_indicator, scrambling_control . */
380 if ((ts[0] != TS_SYNC) || (ts[1] & TS_TEI) || ((ts[3] & TS_SC) != 0)) {
381 printk(KERN_WARNING "%lu: Invalid TS cell: SYNC %#x, TEI %u, SC %#x.\n",
382 priv->ts_count, ts[0], ts[1] & TS_TEI >> 7, ts[3] & 0xC0 >> 6);
384 /* Drop partly decoded SNDU, reset state, resync on PUSI. */
386 dev_kfree_skb( priv->ule_skb );
387 /* Prepare for next SNDU. */
388 dev->stats.rx_errors++;
389 dev->stats.rx_frame_errors++;
394 /* Continue with next TS cell. */
403 /* Synchronize on PUSI, if required. */
404 if (priv->need_pusi) {
405 if (ts[1] & TS_PUSI) {
406 /* Find beginning of first ULE SNDU in current TS cell. */
407 /* Synchronize continuity counter. */
408 priv->tscc = ts[3] & 0x0F;
409 /* There is a pointer field here. */
410 if (ts[4] > ts_remain) {
411 printk(KERN_ERR "%lu: Invalid ULE packet "
412 "(pointer field %d)\n", priv->ts_count, ts[4]);
417 /* Skip to destination of pointer field. */
418 from_where = &ts[5] + ts[4];
419 ts_remain -= 1 + ts[4];
430 /* Check continuity counter. */
431 if ((ts[3] & 0x0F) == priv->tscc)
432 priv->tscc = (priv->tscc + 1) & 0x0F;
434 /* TS discontinuity handling: */
435 printk(KERN_WARNING "%lu: TS discontinuity: got %#x, "
436 "expected %#x.\n", priv->ts_count, ts[3] & 0x0F, priv->tscc);
437 /* Drop partly decoded SNDU, reset state, resync on PUSI. */
439 dev_kfree_skb( priv->ule_skb );
440 /* Prepare for next SNDU. */
441 // reset_ule(priv); moved to below.
442 dev->stats.rx_errors++;
443 dev->stats.rx_frame_errors++;
446 /* skip to next PUSI. */
450 /* If we still have an incomplete payload, but PUSI is
451 * set; some TS cells are missing.
452 * This is only possible here, if we missed exactly 16 TS
453 * cells (continuity counter wrap). */
454 if (ts[1] & TS_PUSI) {
455 if (! priv->need_pusi) {
456 if (!(*from_where < (ts_remain-1)) || *from_where != priv->ule_sndu_remain) {
457 /* Pointer field is invalid. Drop this TS cell and any started ULE SNDU. */
458 printk(KERN_WARNING "%lu: Invalid pointer "
459 "field: %u.\n", priv->ts_count, *from_where);
461 /* Drop partly decoded SNDU, reset state, resync on PUSI. */
463 dev_kfree_skb( priv->ule_skb );
464 dev->stats.rx_errors++;
465 dev->stats.rx_frame_errors++;
471 /* Skip pointer field (we're processing a
472 * packed payload). */
478 if (priv->ule_sndu_remain > 183) {
479 /* Current SNDU lacks more data than there could be available in the
480 * current TS cell. */
481 dev->stats.rx_errors++;
482 dev->stats.rx_length_errors++;
483 printk(KERN_WARNING "%lu: Expected %d more SNDU bytes, but "
484 "got PUSI (pf %d, ts_remain %d). Flushing incomplete payload.\n",
485 priv->ts_count, priv->ule_sndu_remain, ts[4], ts_remain);
486 dev_kfree_skb(priv->ule_skb);
487 /* Prepare for next SNDU. */
489 /* Resync: go to where pointer field points to: start of next ULE SNDU. */
496 /* Check if new payload needs to be started. */
497 if (priv->ule_skb == NULL) {
498 /* Start a new payload with skb.
499 * Find ULE header. It is only guaranteed that the
500 * length field (2 bytes) is contained in the current
502 * Check ts_remain has to be >= 2 here. */
504 printk(KERN_WARNING "Invalid payload packing: only %d "
505 "bytes left in TS. Resyncing.\n", ts_remain);
506 priv->ule_sndu_len = 0;
512 if (! priv->ule_sndu_len) {
513 /* Got at least two bytes, thus extrace the SNDU length. */
514 priv->ule_sndu_len = from_where[0] << 8 | from_where[1];
515 if (priv->ule_sndu_len & 0x8000) {
516 /* D-Bit is set: no dest mac present. */
517 priv->ule_sndu_len &= 0x7FFF;
522 if (priv->ule_sndu_len < 5) {
523 printk(KERN_WARNING "%lu: Invalid ULE SNDU length %u. "
524 "Resyncing.\n", priv->ts_count, priv->ule_sndu_len);
525 dev->stats.rx_errors++;
526 dev->stats.rx_length_errors++;
527 priv->ule_sndu_len = 0;
534 ts_remain -= 2; /* consume the 2 bytes SNDU length. */
539 * State of current TS:
540 * ts_remain (remaining bytes in the current TS cell)
541 * 0 ule_type is not available now, we need the next TS cell
542 * 1 the first byte of the ule_type is present
543 * >=2 full ULE header present, maybe some payload data as well.
547 priv->ule_sndu_type = from_where[0] << 8;
548 priv->ule_sndu_type_1 = 1; /* first byte of ule_type is set. */
549 ts_remain -= 1; from_where += 1;
550 /* Continue w/ next TS. */
557 default: /* complete ULE header is present in current TS. */
558 /* Extract ULE type field. */
559 if (priv->ule_sndu_type_1) {
560 priv->ule_sndu_type |= from_where[0];
561 from_where += 1; /* points to payload start. */
564 /* Complete type is present in new TS. */
565 priv->ule_sndu_type = from_where[0] << 8 | from_where[1];
566 from_where += 2; /* points to payload start. */
572 /* Allocate the skb (decoder target buffer) with the correct size, as follows:
573 * prepare for the largest case: bridged SNDU with MAC address (dbit = 0). */
574 priv->ule_skb = dev_alloc_skb( priv->ule_sndu_len + ETH_HLEN + ETH_ALEN );
575 if (priv->ule_skb == NULL) {
576 printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n",
578 dev->stats.rx_dropped++;
582 /* This includes the CRC32 _and_ dest mac, if !dbit. */
583 priv->ule_sndu_remain = priv->ule_sndu_len;
584 priv->ule_skb->dev = dev;
585 /* Leave space for Ethernet or bridged SNDU header (eth hdr plus one MAC addr). */
586 skb_reserve( priv->ule_skb, ETH_HLEN + ETH_ALEN );
589 /* Copy data into our current skb. */
590 how_much = min(priv->ule_sndu_remain, (int)ts_remain);
591 memcpy(skb_put(priv->ule_skb, how_much), from_where, how_much);
592 priv->ule_sndu_remain -= how_much;
593 ts_remain -= how_much;
594 from_where += how_much;
596 /* Check for complete payload. */
597 if (priv->ule_sndu_remain <= 0) {
598 /* Check CRC32, we've got it in our skb already. */
599 __be16 ulen = htons(priv->ule_sndu_len);
600 __be16 utype = htons(priv->ule_sndu_type);
602 struct kvec iov[3] = {
603 { &ulen, sizeof ulen },
604 { &utype, sizeof utype },
605 { priv->ule_skb->data, priv->ule_skb->len - 4 }
607 u32 ule_crc = ~0L, expected_crc;
608 if (priv->ule_dbit) {
609 /* Set D-bit for CRC32 verification,
610 * if it was set originally. */
611 ulen |= htons(0x8000);
614 ule_crc = iov_crc32(ule_crc, iov, 3);
615 tail = skb_tail_pointer(priv->ule_skb);
616 expected_crc = *(tail - 4) << 24 |
620 if (ule_crc != expected_crc) {
621 printk(KERN_WARNING "%lu: CRC32 check FAILED: %08x / %08x, SNDU len %d type %#x, ts_remain %d, next 2: %x.\n",
622 priv->ts_count, ule_crc, expected_crc, priv->ule_sndu_len, priv->ule_sndu_type, ts_remain, ts_remain > 2 ? *(unsigned short *)from_where : 0);
625 hexdump( iov[0].iov_base, iov[0].iov_len );
626 hexdump( iov[1].iov_base, iov[1].iov_len );
627 hexdump( iov[2].iov_base, iov[2].iov_len );
629 if (ule_where == ule_hist) {
630 hexdump( &ule_hist[98*TS_SZ], TS_SZ );
631 hexdump( &ule_hist[99*TS_SZ], TS_SZ );
632 } else if (ule_where == &ule_hist[TS_SZ]) {
633 hexdump( &ule_hist[99*TS_SZ], TS_SZ );
634 hexdump( ule_hist, TS_SZ );
636 hexdump( ule_where - TS_SZ - TS_SZ, TS_SZ );
637 hexdump( ule_where - TS_SZ, TS_SZ );
642 dev->stats.rx_errors++;
643 dev->stats.rx_crc_errors++;
644 dev_kfree_skb(priv->ule_skb);
646 /* CRC32 verified OK. */
647 u8 dest_addr[ETH_ALEN];
648 static const u8 bc_addr[ETH_ALEN] =
649 { [ 0 ... ETH_ALEN-1] = 0xff };
651 /* CRC32 was OK. Remove it from skb. */
652 priv->ule_skb->tail -= 4;
653 priv->ule_skb->len -= 4;
655 if (!priv->ule_dbit) {
657 * The destination MAC address is the
658 * next data in the skb. It comes
659 * before any extension headers.
661 * Check if the payload of this SNDU
662 * should be passed up the stack.
664 register int drop = 0;
665 if (priv->rx_mode != RX_MODE_PROMISC) {
666 if (priv->ule_skb->data[0] & 0x01) {
667 /* multicast or broadcast */
668 if (memcmp(priv->ule_skb->data, bc_addr, ETH_ALEN)) {
670 if (priv->rx_mode == RX_MODE_MULTI) {
672 for(i = 0; i < priv->multi_num && memcmp(priv->ule_skb->data, priv->multi_macs[i], ETH_ALEN); i++)
674 if (i == priv->multi_num)
676 } else if (priv->rx_mode != RX_MODE_ALL_MULTI)
677 drop = 1; /* no broadcast; */
678 /* else: all multicast mode: accept all multicast packets */
680 /* else: broadcast */
682 else if (memcmp(priv->ule_skb->data, dev->dev_addr, ETH_ALEN))
684 /* else: destination address matches the MAC address of our receiver device */
686 /* else: promiscuous mode; pass everything up the stack */
690 dprintk("Dropping SNDU: MAC destination address does not match: dest addr: "MAC_ADDR_PRINTFMT", dev addr: "MAC_ADDR_PRINTFMT"\n",
691 MAX_ADDR_PRINTFMT_ARGS(priv->ule_skb->data), MAX_ADDR_PRINTFMT_ARGS(dev->dev_addr));
693 dev_kfree_skb(priv->ule_skb);
698 skb_copy_from_linear_data(priv->ule_skb,
701 skb_pull(priv->ule_skb, ETH_ALEN);
705 /* Handle ULE Extension Headers. */
706 if (priv->ule_sndu_type < 1536) {
707 /* There is an extension header. Handle it accordingly. */
708 int l = handle_ule_extensions(priv);
710 /* Mandatory extension header unknown or TEST SNDU. Drop it. */
711 // printk( KERN_WARNING "Dropping SNDU, extension headers.\n" );
712 dev_kfree_skb(priv->ule_skb);
715 skb_pull(priv->ule_skb, l);
719 * Construct/assure correct ethernet header.
720 * Note: in bridged mode (priv->ule_bridged !=
721 * 0) we already have the (original) ethernet
722 * header at the start of the payload (after
723 * optional dest. address and any extension
727 if (!priv->ule_bridged) {
728 skb_push(priv->ule_skb, ETH_HLEN);
729 ethh = (struct ethhdr *)priv->ule_skb->data;
730 if (!priv->ule_dbit) {
731 /* dest_addr buffer is only valid if priv->ule_dbit == 0 */
732 memcpy(ethh->h_dest, dest_addr, ETH_ALEN);
733 memset(ethh->h_source, 0, ETH_ALEN);
735 else /* zeroize source and dest */
736 memset( ethh, 0, ETH_ALEN*2 );
738 ethh->h_proto = htons(priv->ule_sndu_type);
740 /* else: skb is in correct state; nothing to do. */
741 priv->ule_bridged = 0;
743 /* Stuff into kernel's protocol stack. */
744 priv->ule_skb->protocol = dvb_net_eth_type_trans(priv->ule_skb, dev);
745 /* If D-bit is set (i.e. destination MAC address not present),
746 * receive the packet anyhow. */
747 /* if (priv->ule_dbit && skb->pkt_type == PACKET_OTHERHOST)
748 priv->ule_skb->pkt_type = PACKET_HOST; */
749 dev->stats.rx_packets++;
750 dev->stats.rx_bytes += priv->ule_skb->len;
751 netif_rx(priv->ule_skb);
754 /* Prepare for next SNDU. */
758 /* More data in current TS (look at the bytes following the CRC32)? */
759 if (ts_remain >= 2 && *((unsigned short *)from_where) != 0xFFFF) {
760 /* Next ULE SNDU starts right there. */
762 priv->ule_skb = NULL;
763 priv->ule_sndu_type_1 = 0;
764 priv->ule_sndu_len = 0;
765 // printk(KERN_WARNING "More data in current TS: [%#x %#x %#x %#x]\n",
766 // *(from_where + 0), *(from_where + 1),
767 // *(from_where + 2), *(from_where + 3));
768 // printk(KERN_WARNING "ts @ %p, stopped @ %p:\n", ts, from_where + 0);
774 if (priv->ule_skb == NULL) {
776 priv->ule_sndu_type_1 = 0;
777 priv->ule_sndu_len = 0;
780 } /* for all available TS cells */
783 static int dvb_net_ts_callback(const u8 *buffer1, size_t buffer1_len,
784 const u8 *buffer2, size_t buffer2_len,
785 struct dmx_ts_feed *feed, enum dmx_success success)
787 struct net_device *dev = feed->priv;
790 printk(KERN_WARNING "buffer2 not NULL: %p.\n", buffer2);
791 if (buffer1_len > 32768)
792 printk(KERN_WARNING "length > 32k: %zu.\n", buffer1_len);
793 /* printk("TS callback: %u bytes, %u TS cells @ %p.\n",
794 buffer1_len, buffer1_len / TS_SZ, buffer1); */
795 dvb_net_ule(dev, buffer1, buffer1_len);
800 static void dvb_net_sec(struct net_device *dev,
801 const u8 *pkt, int pkt_len)
805 struct net_device_stats *stats = &dev->stats;
808 /* note: pkt_len includes a 32bit checksum */
810 printk("%s: IP/MPE packet length = %d too small.\n",
813 stats->rx_length_errors++;
816 /* it seems some ISPs manage to screw up here, so we have to
817 * relax the error checks... */
819 if ((pkt[5] & 0xfd) != 0xc1) {
820 /* drop scrambled or broken packets */
822 if ((pkt[5] & 0x3c) != 0x00) {
826 stats->rx_crc_errors++;
830 /* handle LLC/SNAP, see rfc-1042 */
831 if (pkt_len < 24 || memcmp(&pkt[12], "\xaa\xaa\x03\0\0\0", 6)) {
838 /* FIXME: assemble datagram from multiple sections */
840 stats->rx_frame_errors++;
844 /* we have 14 byte ethernet header (ip header follows);
845 * 12 byte MPE header; 4 byte checksum; + 2 byte alignment, 8 byte LLC/SNAP
847 if (!(skb = dev_alloc_skb(pkt_len - 4 - 12 + 14 + 2 - snap))) {
848 //printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n", dev->name);
852 skb_reserve(skb, 2); /* longword align L3 header */
855 /* copy L3 payload */
856 eth = (u8 *) skb_put(skb, pkt_len - 12 - 4 + 14 - snap);
857 memcpy(eth + 14, pkt + 12 + snap, pkt_len - 12 - 4 - snap);
859 /* create ethernet header: */
867 eth[6]=eth[7]=eth[8]=eth[9]=eth[10]=eth[11]=0;
873 /* protocol numbers are from rfc-1700 or
874 * http://www.iana.org/assignments/ethernet-numbers
876 if (pkt[12] >> 4 == 6) { /* version field from IP header */
877 eth[12] = 0x86; /* IPv6 */
880 eth[12] = 0x08; /* IPv4 */
885 skb->protocol = dvb_net_eth_type_trans(skb, dev);
888 stats->rx_bytes+=skb->len;
892 static int dvb_net_sec_callback(const u8 *buffer1, size_t buffer1_len,
893 const u8 *buffer2, size_t buffer2_len,
894 struct dmx_section_filter *filter,
895 enum dmx_success success)
897 struct net_device *dev = filter->priv;
900 * we rely on the DVB API definition where exactly one complete
901 * section is delivered in buffer1
903 dvb_net_sec (dev, buffer1, buffer1_len);
907 static int dvb_net_tx(struct sk_buff *skb, struct net_device *dev)
913 static u8 mask_normal[6]={0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
914 static u8 mask_allmulti[6]={0xff, 0xff, 0xff, 0x00, 0x00, 0x00};
915 static u8 mac_allmulti[6]={0x01, 0x00, 0x5e, 0x00, 0x00, 0x00};
916 static u8 mask_promisc[6]={0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
918 static int dvb_net_filter_sec_set(struct net_device *dev,
919 struct dmx_section_filter **secfilter,
920 u8 *mac, u8 *mac_mask)
922 struct dvb_net_priv *priv = netdev_priv(dev);
926 ret = priv->secfeed->allocate_filter(priv->secfeed, secfilter);
928 printk("%s: could not get filter\n", dev->name);
932 (*secfilter)->priv=(void *) dev;
934 memset((*secfilter)->filter_value, 0x00, DMX_MAX_FILTER_SIZE);
935 memset((*secfilter)->filter_mask, 0x00, DMX_MAX_FILTER_SIZE);
936 memset((*secfilter)->filter_mode, 0xff, DMX_MAX_FILTER_SIZE);
938 (*secfilter)->filter_value[0]=0x3e;
939 (*secfilter)->filter_value[3]=mac[5];
940 (*secfilter)->filter_value[4]=mac[4];
941 (*secfilter)->filter_value[8]=mac[3];
942 (*secfilter)->filter_value[9]=mac[2];
943 (*secfilter)->filter_value[10]=mac[1];
944 (*secfilter)->filter_value[11]=mac[0];
946 (*secfilter)->filter_mask[0] = 0xff;
947 (*secfilter)->filter_mask[3] = mac_mask[5];
948 (*secfilter)->filter_mask[4] = mac_mask[4];
949 (*secfilter)->filter_mask[8] = mac_mask[3];
950 (*secfilter)->filter_mask[9] = mac_mask[2];
951 (*secfilter)->filter_mask[10] = mac_mask[1];
952 (*secfilter)->filter_mask[11]=mac_mask[0];
954 dprintk("%s: filter mac=%pM\n", dev->name, mac);
955 dprintk("%s: filter mask=%pM\n", dev->name, mac_mask);
960 static int dvb_net_feed_start(struct net_device *dev)
963 struct dvb_net_priv *priv = netdev_priv(dev);
964 struct dmx_demux *demux = priv->demux;
965 unsigned char *mac = (unsigned char *) dev->dev_addr;
967 dprintk("%s: rx_mode %i\n", __func__, priv->rx_mode);
968 mutex_lock(&priv->mutex);
969 if (priv->tsfeed || priv->secfeed || priv->secfilter || priv->multi_secfilter[0])
970 printk("%s: BUG %d\n", __func__, __LINE__);
973 priv->secfilter=NULL;
976 if (priv->feedtype == DVB_NET_FEEDTYPE_MPE) {
977 dprintk("%s: alloc secfeed\n", __func__);
978 ret=demux->allocate_section_feed(demux, &priv->secfeed,
979 dvb_net_sec_callback);
981 printk("%s: could not allocate section feed\n", dev->name);
985 ret = priv->secfeed->set(priv->secfeed, priv->pid, 32768, 1);
988 printk("%s: could not set section feed\n", dev->name);
989 priv->demux->release_section_feed(priv->demux, priv->secfeed);
994 if (priv->rx_mode != RX_MODE_PROMISC) {
995 dprintk("%s: set secfilter\n", __func__);
996 dvb_net_filter_sec_set(dev, &priv->secfilter, mac, mask_normal);
999 switch (priv->rx_mode) {
1001 for (i = 0; i < priv->multi_num; i++) {
1002 dprintk("%s: set multi_secfilter[%d]\n", __func__, i);
1003 dvb_net_filter_sec_set(dev, &priv->multi_secfilter[i],
1004 priv->multi_macs[i], mask_normal);
1007 case RX_MODE_ALL_MULTI:
1009 dprintk("%s: set multi_secfilter[0]\n", __func__);
1010 dvb_net_filter_sec_set(dev, &priv->multi_secfilter[0],
1011 mac_allmulti, mask_allmulti);
1013 case RX_MODE_PROMISC:
1015 dprintk("%s: set secfilter\n", __func__);
1016 dvb_net_filter_sec_set(dev, &priv->secfilter, mac, mask_promisc);
1020 dprintk("%s: start filtering\n", __func__);
1021 priv->secfeed->start_filtering(priv->secfeed);
1022 } else if (priv->feedtype == DVB_NET_FEEDTYPE_ULE) {
1023 struct timespec timeout = { 0, 10000000 }; // 10 msec
1025 /* we have payloads encapsulated in TS */
1026 dprintk("%s: alloc tsfeed\n", __func__);
1027 ret = demux->allocate_ts_feed(demux, &priv->tsfeed, dvb_net_ts_callback);
1029 printk("%s: could not allocate ts feed\n", dev->name);
1033 /* Set netdevice pointer for ts decaps callback. */
1034 priv->tsfeed->priv = (void *)dev;
1035 ret = priv->tsfeed->set(priv->tsfeed,
1036 priv->pid, /* pid */
1037 TS_PACKET, /* type */
1038 DMX_TS_PES_OTHER, /* pes type */
1039 32768, /* circular buffer size */
1040 timeout /* timeout */
1044 printk("%s: could not set ts feed\n", dev->name);
1045 priv->demux->release_ts_feed(priv->demux, priv->tsfeed);
1046 priv->tsfeed = NULL;
1050 dprintk("%s: start filtering\n", __func__);
1051 priv->tsfeed->start_filtering(priv->tsfeed);
1056 mutex_unlock(&priv->mutex);
1060 static int dvb_net_feed_stop(struct net_device *dev)
1062 struct dvb_net_priv *priv = netdev_priv(dev);
1065 dprintk("%s\n", __func__);
1066 mutex_lock(&priv->mutex);
1067 if (priv->feedtype == DVB_NET_FEEDTYPE_MPE) {
1068 if (priv->secfeed) {
1069 if (priv->secfeed->is_filtering) {
1070 dprintk("%s: stop secfeed\n", __func__);
1071 priv->secfeed->stop_filtering(priv->secfeed);
1074 if (priv->secfilter) {
1075 dprintk("%s: release secfilter\n", __func__);
1076 priv->secfeed->release_filter(priv->secfeed,
1078 priv->secfilter=NULL;
1081 for (i=0; i<priv->multi_num; i++) {
1082 if (priv->multi_secfilter[i]) {
1083 dprintk("%s: release multi_filter[%d]\n",
1085 priv->secfeed->release_filter(priv->secfeed,
1086 priv->multi_secfilter[i]);
1087 priv->multi_secfilter[i] = NULL;
1091 priv->demux->release_section_feed(priv->demux, priv->secfeed);
1092 priv->secfeed = NULL;
1094 printk("%s: no feed to stop\n", dev->name);
1095 } else if (priv->feedtype == DVB_NET_FEEDTYPE_ULE) {
1097 if (priv->tsfeed->is_filtering) {
1098 dprintk("%s: stop tsfeed\n", __func__);
1099 priv->tsfeed->stop_filtering(priv->tsfeed);
1101 priv->demux->release_ts_feed(priv->demux, priv->tsfeed);
1102 priv->tsfeed = NULL;
1105 printk("%s: no ts feed to stop\n", dev->name);
1108 mutex_unlock(&priv->mutex);
1113 static int dvb_set_mc_filter(struct net_device *dev, unsigned char *addr)
1115 struct dvb_net_priv *priv = netdev_priv(dev);
1117 if (priv->multi_num == DVB_NET_MULTICAST_MAX)
1120 memcpy(priv->multi_macs[priv->multi_num], addr, ETH_ALEN);
1127 static void wq_set_multicast_list (struct work_struct *work)
1129 struct dvb_net_priv *priv =
1130 container_of(work, struct dvb_net_priv, set_multicast_list_wq);
1131 struct net_device *dev = priv->net;
1133 dvb_net_feed_stop(dev);
1134 priv->rx_mode = RX_MODE_UNI;
1135 netif_addr_lock_bh(dev);
1137 if (dev->flags & IFF_PROMISC) {
1138 dprintk("%s: promiscuous mode\n", dev->name);
1139 priv->rx_mode = RX_MODE_PROMISC;
1140 } else if ((dev->flags & IFF_ALLMULTI)) {
1141 dprintk("%s: allmulti mode\n", dev->name);
1142 priv->rx_mode = RX_MODE_ALL_MULTI;
1143 } else if (!netdev_mc_empty(dev)) {
1144 struct netdev_hw_addr *ha;
1146 dprintk("%s: set_mc_list, %d entries\n",
1147 dev->name, netdev_mc_count(dev));
1149 priv->rx_mode = RX_MODE_MULTI;
1150 priv->multi_num = 0;
1152 netdev_for_each_mc_addr(ha, dev)
1153 dvb_set_mc_filter(dev, ha->addr);
1156 netif_addr_unlock_bh(dev);
1157 dvb_net_feed_start(dev);
1161 static void dvb_net_set_multicast_list (struct net_device *dev)
1163 struct dvb_net_priv *priv = netdev_priv(dev);
1164 schedule_work(&priv->set_multicast_list_wq);
1168 static void wq_restart_net_feed (struct work_struct *work)
1170 struct dvb_net_priv *priv =
1171 container_of(work, struct dvb_net_priv, restart_net_feed_wq);
1172 struct net_device *dev = priv->net;
1174 if (netif_running(dev)) {
1175 dvb_net_feed_stop(dev);
1176 dvb_net_feed_start(dev);
1181 static int dvb_net_set_mac (struct net_device *dev, void *p)
1183 struct dvb_net_priv *priv = netdev_priv(dev);
1184 struct sockaddr *addr=p;
1186 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1188 if (netif_running(dev))
1189 schedule_work(&priv->restart_net_feed_wq);
1195 static int dvb_net_open(struct net_device *dev)
1197 struct dvb_net_priv *priv = netdev_priv(dev);
1200 dvb_net_feed_start(dev);
1205 static int dvb_net_stop(struct net_device *dev)
1207 struct dvb_net_priv *priv = netdev_priv(dev);
1210 return dvb_net_feed_stop(dev);
1213 static const struct header_ops dvb_header_ops = {
1214 .create = eth_header,
1215 .parse = eth_header_parse,
1216 .rebuild = eth_rebuild_header,
1220 static const struct net_device_ops dvb_netdev_ops = {
1221 .ndo_open = dvb_net_open,
1222 .ndo_stop = dvb_net_stop,
1223 .ndo_start_xmit = dvb_net_tx,
1224 .ndo_set_multicast_list = dvb_net_set_multicast_list,
1225 .ndo_set_mac_address = dvb_net_set_mac,
1226 .ndo_change_mtu = eth_change_mtu,
1227 .ndo_validate_addr = eth_validate_addr,
1230 static void dvb_net_setup(struct net_device *dev)
1234 dev->header_ops = &dvb_header_ops;
1235 dev->netdev_ops = &dvb_netdev_ops;
1238 dev->flags |= IFF_NOARP;
1241 static int get_if(struct dvb_net *dvbnet)
1245 for (i=0; i<DVB_NET_DEVICES_MAX; i++)
1246 if (!dvbnet->state[i])
1249 if (i == DVB_NET_DEVICES_MAX)
1256 static int dvb_net_add_if(struct dvb_net *dvbnet, u16 pid, u8 feedtype)
1258 struct net_device *net;
1259 struct dvb_net_priv *priv;
1263 if (feedtype != DVB_NET_FEEDTYPE_MPE && feedtype != DVB_NET_FEEDTYPE_ULE)
1265 if ((if_num = get_if(dvbnet)) < 0)
1268 net = alloc_netdev(sizeof(struct dvb_net_priv), "dvb", dvb_net_setup);
1272 if (dvbnet->dvbdev->id)
1273 snprintf(net->name, IFNAMSIZ, "dvb%d%u%d",
1274 dvbnet->dvbdev->adapter->num, dvbnet->dvbdev->id, if_num);
1276 /* compatibility fix to keep dvb0_0 format */
1277 snprintf(net->name, IFNAMSIZ, "dvb%d_%d",
1278 dvbnet->dvbdev->adapter->num, if_num);
1281 memcpy(net->dev_addr, dvbnet->dvbdev->adapter->proposed_mac, 6);
1283 dvbnet->device[if_num] = net;
1285 priv = netdev_priv(net);
1287 priv->demux = dvbnet->demux;
1289 priv->rx_mode = RX_MODE_UNI;
1290 priv->need_pusi = 1;
1292 priv->feedtype = feedtype;
1295 INIT_WORK(&priv->set_multicast_list_wq, wq_set_multicast_list);
1296 INIT_WORK(&priv->restart_net_feed_wq, wq_restart_net_feed);
1297 mutex_init(&priv->mutex);
1299 net->base_addr = pid;
1301 if ((result = register_netdev(net)) < 0) {
1302 dvbnet->device[if_num] = NULL;
1306 printk("dvb_net: created network interface %s\n", net->name);
1311 static int dvb_net_remove_if(struct dvb_net *dvbnet, unsigned long num)
1313 struct net_device *net = dvbnet->device[num];
1314 struct dvb_net_priv *priv;
1316 if (!dvbnet->state[num])
1318 priv = netdev_priv(net);
1323 flush_scheduled_work();
1324 printk("dvb_net: removed network interface %s\n", net->name);
1325 unregister_netdev(net);
1326 dvbnet->state[num]=0;
1327 dvbnet->device[num] = NULL;
1333 static int dvb_net_do_ioctl(struct file *file,
1334 unsigned int cmd, void *parg)
1336 struct dvb_device *dvbdev = file->private_data;
1337 struct dvb_net *dvbnet = dvbdev->priv;
1339 if (((file->f_flags&O_ACCMODE)==O_RDONLY))
1345 struct dvb_net_if *dvbnetif = parg;
1348 if (!capable(CAP_SYS_ADMIN))
1351 if (!try_module_get(dvbdev->adapter->module))
1354 result=dvb_net_add_if(dvbnet, dvbnetif->pid, dvbnetif->feedtype);
1356 module_put(dvbdev->adapter->module);
1359 dvbnetif->if_num=result;
1364 struct net_device *netdev;
1365 struct dvb_net_priv *priv_data;
1366 struct dvb_net_if *dvbnetif = parg;
1368 if (dvbnetif->if_num >= DVB_NET_DEVICES_MAX ||
1369 !dvbnet->state[dvbnetif->if_num])
1372 netdev = dvbnet->device[dvbnetif->if_num];
1374 priv_data = netdev_priv(netdev);
1375 dvbnetif->pid=priv_data->pid;
1376 dvbnetif->feedtype=priv_data->feedtype;
1383 if (!capable(CAP_SYS_ADMIN))
1385 if ((unsigned long) parg >= DVB_NET_DEVICES_MAX)
1387 ret = dvb_net_remove_if(dvbnet, (unsigned long) parg);
1389 module_put(dvbdev->adapter->module);
1393 /* binary compatibility cruft */
1394 case __NET_ADD_IF_OLD:
1396 struct __dvb_net_if_old *dvbnetif = parg;
1399 if (!capable(CAP_SYS_ADMIN))
1402 if (!try_module_get(dvbdev->adapter->module))
1405 result=dvb_net_add_if(dvbnet, dvbnetif->pid, DVB_NET_FEEDTYPE_MPE);
1407 module_put(dvbdev->adapter->module);
1410 dvbnetif->if_num=result;
1413 case __NET_GET_IF_OLD:
1415 struct net_device *netdev;
1416 struct dvb_net_priv *priv_data;
1417 struct __dvb_net_if_old *dvbnetif = parg;
1419 if (dvbnetif->if_num >= DVB_NET_DEVICES_MAX ||
1420 !dvbnet->state[dvbnetif->if_num])
1423 netdev = dvbnet->device[dvbnetif->if_num];
1425 priv_data = netdev_priv(netdev);
1426 dvbnetif->pid=priv_data->pid;
1435 static long dvb_net_ioctl(struct file *file,
1436 unsigned int cmd, unsigned long arg)
1441 ret = dvb_usercopy(file, cmd, arg, dvb_net_do_ioctl);
1447 static int dvb_net_close(struct inode *inode, struct file *file)
1449 struct dvb_device *dvbdev = file->private_data;
1450 struct dvb_net *dvbnet = dvbdev->priv;
1452 dvb_generic_release(inode, file);
1454 if(dvbdev->users == 1 && dvbnet->exit == 1) {
1455 fops_put(file->f_op);
1457 wake_up(&dvbdev->wait_queue);
1463 static const struct file_operations dvb_net_fops = {
1464 .owner = THIS_MODULE,
1465 .unlocked_ioctl = dvb_net_ioctl,
1466 .open = dvb_generic_open,
1467 .release = dvb_net_close,
1470 static struct dvb_device dvbdev_net = {
1474 .fops = &dvb_net_fops,
1478 void dvb_net_release (struct dvb_net *dvbnet)
1483 if (dvbnet->dvbdev->users < 1)
1484 wait_event(dvbnet->dvbdev->wait_queue,
1485 dvbnet->dvbdev->users==1);
1487 dvb_unregister_device(dvbnet->dvbdev);
1489 for (i=0; i<DVB_NET_DEVICES_MAX; i++) {
1490 if (!dvbnet->state[i])
1492 dvb_net_remove_if(dvbnet, i);
1495 EXPORT_SYMBOL(dvb_net_release);
1498 int dvb_net_init (struct dvb_adapter *adap, struct dvb_net *dvbnet,
1499 struct dmx_demux *dmx)
1503 dvbnet->demux = dmx;
1505 for (i=0; i<DVB_NET_DEVICES_MAX; i++)
1506 dvbnet->state[i] = 0;
1508 dvb_register_device (adap, &dvbnet->dvbdev, &dvbdev_net,
1509 dvbnet, DVB_DEVICE_NET);
1513 EXPORT_SYMBOL(dvb_net_init);