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;
357 /* The code inside ULE_DEBUG keeps a history of the last 100 TS cells processed. */
358 static unsigned char ule_hist[100*TS_SZ];
359 static unsigned char *ule_where = ule_hist, ule_dump;
362 /* For all TS cells in current buffer.
363 * Appearently, we are called for every single TS cell.
365 for (ts = buf, ts_end = buf + buf_len; ts < ts_end; /* no default incr. */ ) {
368 /* We are about to process a new TS cell. */
371 if (ule_where >= &ule_hist[100*TS_SZ]) ule_where = ule_hist;
372 memcpy( ule_where, ts, TS_SZ );
374 hexdump( ule_where, TS_SZ );
380 /* Check TS error conditions: sync_byte, transport_error_indicator, scrambling_control . */
381 if ((ts[0] != TS_SYNC) || (ts[1] & TS_TEI) || ((ts[3] & TS_SC) != 0)) {
382 printk(KERN_WARNING "%lu: Invalid TS cell: SYNC %#x, TEI %u, SC %#x.\n",
383 priv->ts_count, ts[0], ts[1] & TS_TEI >> 7, ts[3] & 0xC0 >> 6);
385 /* Drop partly decoded SNDU, reset state, resync on PUSI. */
387 dev_kfree_skb( priv->ule_skb );
388 /* Prepare for next SNDU. */
389 dev->stats.rx_errors++;
390 dev->stats.rx_frame_errors++;
395 /* Continue with next TS cell. */
404 /* Synchronize on PUSI, if required. */
405 if (priv->need_pusi) {
406 if (ts[1] & TS_PUSI) {
407 /* Find beginning of first ULE SNDU in current TS cell. */
408 /* Synchronize continuity counter. */
409 priv->tscc = ts[3] & 0x0F;
410 /* There is a pointer field here. */
411 if (ts[4] > ts_remain) {
412 printk(KERN_ERR "%lu: Invalid ULE packet "
413 "(pointer field %d)\n", priv->ts_count, ts[4]);
418 /* Skip to destination of pointer field. */
419 from_where = &ts[5] + ts[4];
420 ts_remain -= 1 + ts[4];
431 /* Check continuity counter. */
432 if ((ts[3] & 0x0F) == priv->tscc)
433 priv->tscc = (priv->tscc + 1) & 0x0F;
435 /* TS discontinuity handling: */
436 printk(KERN_WARNING "%lu: TS discontinuity: got %#x, "
437 "expected %#x.\n", priv->ts_count, ts[3] & 0x0F, priv->tscc);
438 /* Drop partly decoded SNDU, reset state, resync on PUSI. */
440 dev_kfree_skb( priv->ule_skb );
441 /* Prepare for next SNDU. */
442 // reset_ule(priv); moved to below.
443 dev->stats.rx_errors++;
444 dev->stats.rx_frame_errors++;
447 /* skip to next PUSI. */
451 /* If we still have an incomplete payload, but PUSI is
452 * set; some TS cells are missing.
453 * This is only possible here, if we missed exactly 16 TS
454 * cells (continuity counter wrap). */
455 if (ts[1] & TS_PUSI) {
456 if (! priv->need_pusi) {
457 if (!(*from_where < (ts_remain-1)) || *from_where != priv->ule_sndu_remain) {
458 /* Pointer field is invalid. Drop this TS cell and any started ULE SNDU. */
459 printk(KERN_WARNING "%lu: Invalid pointer "
460 "field: %u.\n", priv->ts_count, *from_where);
462 /* Drop partly decoded SNDU, reset state, resync on PUSI. */
465 dev_kfree_skb(priv->ule_skb);
468 if (error || priv->ule_sndu_remain) {
469 dev->stats.rx_errors++;
470 dev->stats.rx_frame_errors++;
478 /* Skip pointer field (we're processing a
479 * packed payload). */
485 if (priv->ule_sndu_remain > 183) {
486 /* Current SNDU lacks more data than there could be available in the
487 * current TS cell. */
488 dev->stats.rx_errors++;
489 dev->stats.rx_length_errors++;
490 printk(KERN_WARNING "%lu: Expected %d more SNDU bytes, but "
491 "got PUSI (pf %d, ts_remain %d). Flushing incomplete payload.\n",
492 priv->ts_count, priv->ule_sndu_remain, ts[4], ts_remain);
493 dev_kfree_skb(priv->ule_skb);
494 /* Prepare for next SNDU. */
496 /* Resync: go to where pointer field points to: start of next ULE SNDU. */
503 /* Check if new payload needs to be started. */
504 if (priv->ule_skb == NULL) {
505 /* Start a new payload with skb.
506 * Find ULE header. It is only guaranteed that the
507 * length field (2 bytes) is contained in the current
509 * Check ts_remain has to be >= 2 here. */
511 printk(KERN_WARNING "Invalid payload packing: only %d "
512 "bytes left in TS. Resyncing.\n", ts_remain);
513 priv->ule_sndu_len = 0;
519 if (! priv->ule_sndu_len) {
520 /* Got at least two bytes, thus extrace the SNDU length. */
521 priv->ule_sndu_len = from_where[0] << 8 | from_where[1];
522 if (priv->ule_sndu_len & 0x8000) {
523 /* D-Bit is set: no dest mac present. */
524 priv->ule_sndu_len &= 0x7FFF;
529 if (priv->ule_sndu_len < 5) {
530 printk(KERN_WARNING "%lu: Invalid ULE SNDU length %u. "
531 "Resyncing.\n", priv->ts_count, priv->ule_sndu_len);
532 dev->stats.rx_errors++;
533 dev->stats.rx_length_errors++;
534 priv->ule_sndu_len = 0;
541 ts_remain -= 2; /* consume the 2 bytes SNDU length. */
545 priv->ule_sndu_remain = priv->ule_sndu_len + 2;
547 * State of current TS:
548 * ts_remain (remaining bytes in the current TS cell)
549 * 0 ule_type is not available now, we need the next TS cell
550 * 1 the first byte of the ule_type is present
551 * >=2 full ULE header present, maybe some payload data as well.
555 priv->ule_sndu_remain--;
556 priv->ule_sndu_type = from_where[0] << 8;
557 priv->ule_sndu_type_1 = 1; /* first byte of ule_type is set. */
558 ts_remain -= 1; from_where += 1;
559 /* Continue w/ next TS. */
566 default: /* complete ULE header is present in current TS. */
567 /* Extract ULE type field. */
568 if (priv->ule_sndu_type_1) {
569 priv->ule_sndu_type_1 = 0;
570 priv->ule_sndu_type |= from_where[0];
571 from_where += 1; /* points to payload start. */
574 /* Complete type is present in new TS. */
575 priv->ule_sndu_type = from_where[0] << 8 | from_where[1];
576 from_where += 2; /* points to payload start. */
582 /* Allocate the skb (decoder target buffer) with the correct size, as follows:
583 * prepare for the largest case: bridged SNDU with MAC address (dbit = 0). */
584 priv->ule_skb = dev_alloc_skb( priv->ule_sndu_len + ETH_HLEN + ETH_ALEN );
585 if (priv->ule_skb == NULL) {
586 printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n",
588 dev->stats.rx_dropped++;
592 /* This includes the CRC32 _and_ dest mac, if !dbit. */
593 priv->ule_sndu_remain = priv->ule_sndu_len;
594 priv->ule_skb->dev = dev;
595 /* Leave space for Ethernet or bridged SNDU header (eth hdr plus one MAC addr). */
596 skb_reserve( priv->ule_skb, ETH_HLEN + ETH_ALEN );
599 /* Copy data into our current skb. */
600 how_much = min(priv->ule_sndu_remain, (int)ts_remain);
601 memcpy(skb_put(priv->ule_skb, how_much), from_where, how_much);
602 priv->ule_sndu_remain -= how_much;
603 ts_remain -= how_much;
604 from_where += how_much;
606 /* Check for complete payload. */
607 if (priv->ule_sndu_remain <= 0) {
608 /* Check CRC32, we've got it in our skb already. */
609 __be16 ulen = htons(priv->ule_sndu_len);
610 __be16 utype = htons(priv->ule_sndu_type);
612 struct kvec iov[3] = {
613 { &ulen, sizeof ulen },
614 { &utype, sizeof utype },
615 { priv->ule_skb->data, priv->ule_skb->len - 4 }
617 u32 ule_crc = ~0L, expected_crc;
618 if (priv->ule_dbit) {
619 /* Set D-bit for CRC32 verification,
620 * if it was set originally. */
621 ulen |= htons(0x8000);
624 ule_crc = iov_crc32(ule_crc, iov, 3);
625 tail = skb_tail_pointer(priv->ule_skb);
626 expected_crc = *(tail - 4) << 24 |
630 if (ule_crc != expected_crc) {
631 printk(KERN_WARNING "%lu: CRC32 check FAILED: %08x / %08x, SNDU len %d type %#x, ts_remain %d, next 2: %x.\n",
632 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);
635 hexdump( iov[0].iov_base, iov[0].iov_len );
636 hexdump( iov[1].iov_base, iov[1].iov_len );
637 hexdump( iov[2].iov_base, iov[2].iov_len );
639 if (ule_where == ule_hist) {
640 hexdump( &ule_hist[98*TS_SZ], TS_SZ );
641 hexdump( &ule_hist[99*TS_SZ], TS_SZ );
642 } else if (ule_where == &ule_hist[TS_SZ]) {
643 hexdump( &ule_hist[99*TS_SZ], TS_SZ );
644 hexdump( ule_hist, TS_SZ );
646 hexdump( ule_where - TS_SZ - TS_SZ, TS_SZ );
647 hexdump( ule_where - TS_SZ, TS_SZ );
652 dev->stats.rx_errors++;
653 dev->stats.rx_crc_errors++;
654 dev_kfree_skb(priv->ule_skb);
656 /* CRC32 verified OK. */
657 u8 dest_addr[ETH_ALEN];
658 static const u8 bc_addr[ETH_ALEN] =
659 { [ 0 ... ETH_ALEN-1] = 0xff };
661 /* CRC32 was OK. Remove it from skb. */
662 priv->ule_skb->tail -= 4;
663 priv->ule_skb->len -= 4;
665 if (!priv->ule_dbit) {
667 * The destination MAC address is the
668 * next data in the skb. It comes
669 * before any extension headers.
671 * Check if the payload of this SNDU
672 * should be passed up the stack.
674 register int drop = 0;
675 if (priv->rx_mode != RX_MODE_PROMISC) {
676 if (priv->ule_skb->data[0] & 0x01) {
677 /* multicast or broadcast */
678 if (memcmp(priv->ule_skb->data, bc_addr, ETH_ALEN)) {
680 if (priv->rx_mode == RX_MODE_MULTI) {
682 for(i = 0; i < priv->multi_num && memcmp(priv->ule_skb->data, priv->multi_macs[i], ETH_ALEN); i++)
684 if (i == priv->multi_num)
686 } else if (priv->rx_mode != RX_MODE_ALL_MULTI)
687 drop = 1; /* no broadcast; */
688 /* else: all multicast mode: accept all multicast packets */
690 /* else: broadcast */
692 else if (memcmp(priv->ule_skb->data, dev->dev_addr, ETH_ALEN))
694 /* else: destination address matches the MAC address of our receiver device */
696 /* else: promiscuous mode; pass everything up the stack */
700 dprintk("Dropping SNDU: MAC destination address does not match: dest addr: "MAC_ADDR_PRINTFMT", dev addr: "MAC_ADDR_PRINTFMT"\n",
701 MAX_ADDR_PRINTFMT_ARGS(priv->ule_skb->data), MAX_ADDR_PRINTFMT_ARGS(dev->dev_addr));
703 dev_kfree_skb(priv->ule_skb);
708 skb_copy_from_linear_data(priv->ule_skb,
711 skb_pull(priv->ule_skb, ETH_ALEN);
715 /* Handle ULE Extension Headers. */
716 if (priv->ule_sndu_type < 1536) {
717 /* There is an extension header. Handle it accordingly. */
718 int l = handle_ule_extensions(priv);
720 /* Mandatory extension header unknown or TEST SNDU. Drop it. */
721 // printk( KERN_WARNING "Dropping SNDU, extension headers.\n" );
722 dev_kfree_skb(priv->ule_skb);
725 skb_pull(priv->ule_skb, l);
729 * Construct/assure correct ethernet header.
730 * Note: in bridged mode (priv->ule_bridged !=
731 * 0) we already have the (original) ethernet
732 * header at the start of the payload (after
733 * optional dest. address and any extension
737 if (!priv->ule_bridged) {
738 skb_push(priv->ule_skb, ETH_HLEN);
739 ethh = (struct ethhdr *)priv->ule_skb->data;
740 if (!priv->ule_dbit) {
741 /* dest_addr buffer is only valid if priv->ule_dbit == 0 */
742 memcpy(ethh->h_dest, dest_addr, ETH_ALEN);
743 memset(ethh->h_source, 0, ETH_ALEN);
745 else /* zeroize source and dest */
746 memset( ethh, 0, ETH_ALEN*2 );
748 ethh->h_proto = htons(priv->ule_sndu_type);
750 /* else: skb is in correct state; nothing to do. */
751 priv->ule_bridged = 0;
753 /* Stuff into kernel's protocol stack. */
754 priv->ule_skb->protocol = dvb_net_eth_type_trans(priv->ule_skb, dev);
755 /* If D-bit is set (i.e. destination MAC address not present),
756 * receive the packet anyhow. */
757 /* if (priv->ule_dbit && skb->pkt_type == PACKET_OTHERHOST)
758 priv->ule_skb->pkt_type = PACKET_HOST; */
759 dev->stats.rx_packets++;
760 dev->stats.rx_bytes += priv->ule_skb->len;
761 netif_rx(priv->ule_skb);
764 /* Prepare for next SNDU. */
768 /* More data in current TS (look at the bytes following the CRC32)? */
769 if (ts_remain >= 2 && *((unsigned short *)from_where) != 0xFFFF) {
770 /* Next ULE SNDU starts right there. */
772 priv->ule_skb = NULL;
773 priv->ule_sndu_type_1 = 0;
774 priv->ule_sndu_len = 0;
775 // printk(KERN_WARNING "More data in current TS: [%#x %#x %#x %#x]\n",
776 // *(from_where + 0), *(from_where + 1),
777 // *(from_where + 2), *(from_where + 3));
778 // printk(KERN_WARNING "ts @ %p, stopped @ %p:\n", ts, from_where + 0);
784 if (priv->ule_skb == NULL) {
786 priv->ule_sndu_type_1 = 0;
787 priv->ule_sndu_len = 0;
790 } /* for all available TS cells */
793 static int dvb_net_ts_callback(const u8 *buffer1, size_t buffer1_len,
794 const u8 *buffer2, size_t buffer2_len,
795 struct dmx_ts_feed *feed, enum dmx_success success)
797 struct net_device *dev = feed->priv;
800 printk(KERN_WARNING "buffer2 not NULL: %p.\n", buffer2);
801 if (buffer1_len > 32768)
802 printk(KERN_WARNING "length > 32k: %zu.\n", buffer1_len);
803 /* printk("TS callback: %u bytes, %u TS cells @ %p.\n",
804 buffer1_len, buffer1_len / TS_SZ, buffer1); */
805 dvb_net_ule(dev, buffer1, buffer1_len);
810 static void dvb_net_sec(struct net_device *dev,
811 const u8 *pkt, int pkt_len)
815 struct net_device_stats *stats = &dev->stats;
818 /* note: pkt_len includes a 32bit checksum */
820 printk("%s: IP/MPE packet length = %d too small.\n",
823 stats->rx_length_errors++;
826 /* it seems some ISPs manage to screw up here, so we have to
827 * relax the error checks... */
829 if ((pkt[5] & 0xfd) != 0xc1) {
830 /* drop scrambled or broken packets */
832 if ((pkt[5] & 0x3c) != 0x00) {
836 stats->rx_crc_errors++;
840 /* handle LLC/SNAP, see rfc-1042 */
841 if (pkt_len < 24 || memcmp(&pkt[12], "\xaa\xaa\x03\0\0\0", 6)) {
848 /* FIXME: assemble datagram from multiple sections */
850 stats->rx_frame_errors++;
854 /* we have 14 byte ethernet header (ip header follows);
855 * 12 byte MPE header; 4 byte checksum; + 2 byte alignment, 8 byte LLC/SNAP
857 if (!(skb = dev_alloc_skb(pkt_len - 4 - 12 + 14 + 2 - snap))) {
858 //printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n", dev->name);
862 skb_reserve(skb, 2); /* longword align L3 header */
865 /* copy L3 payload */
866 eth = (u8 *) skb_put(skb, pkt_len - 12 - 4 + 14 - snap);
867 memcpy(eth + 14, pkt + 12 + snap, pkt_len - 12 - 4 - snap);
869 /* create ethernet header: */
877 eth[6]=eth[7]=eth[8]=eth[9]=eth[10]=eth[11]=0;
883 /* protocol numbers are from rfc-1700 or
884 * http://www.iana.org/assignments/ethernet-numbers
886 if (pkt[12] >> 4 == 6) { /* version field from IP header */
887 eth[12] = 0x86; /* IPv6 */
890 eth[12] = 0x08; /* IPv4 */
895 skb->protocol = dvb_net_eth_type_trans(skb, dev);
898 stats->rx_bytes+=skb->len;
902 static int dvb_net_sec_callback(const u8 *buffer1, size_t buffer1_len,
903 const u8 *buffer2, size_t buffer2_len,
904 struct dmx_section_filter *filter,
905 enum dmx_success success)
907 struct net_device *dev = filter->priv;
910 * we rely on the DVB API definition where exactly one complete
911 * section is delivered in buffer1
913 dvb_net_sec (dev, buffer1, buffer1_len);
917 static int dvb_net_tx(struct sk_buff *skb, struct net_device *dev)
923 static u8 mask_normal[6]={0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
924 static u8 mask_allmulti[6]={0xff, 0xff, 0xff, 0x00, 0x00, 0x00};
925 static u8 mac_allmulti[6]={0x01, 0x00, 0x5e, 0x00, 0x00, 0x00};
926 static u8 mask_promisc[6]={0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
928 static int dvb_net_filter_sec_set(struct net_device *dev,
929 struct dmx_section_filter **secfilter,
930 u8 *mac, u8 *mac_mask)
932 struct dvb_net_priv *priv = netdev_priv(dev);
936 ret = priv->secfeed->allocate_filter(priv->secfeed, secfilter);
938 printk("%s: could not get filter\n", dev->name);
942 (*secfilter)->priv=(void *) dev;
944 memset((*secfilter)->filter_value, 0x00, DMX_MAX_FILTER_SIZE);
945 memset((*secfilter)->filter_mask, 0x00, DMX_MAX_FILTER_SIZE);
946 memset((*secfilter)->filter_mode, 0xff, DMX_MAX_FILTER_SIZE);
948 (*secfilter)->filter_value[0]=0x3e;
949 (*secfilter)->filter_value[3]=mac[5];
950 (*secfilter)->filter_value[4]=mac[4];
951 (*secfilter)->filter_value[8]=mac[3];
952 (*secfilter)->filter_value[9]=mac[2];
953 (*secfilter)->filter_value[10]=mac[1];
954 (*secfilter)->filter_value[11]=mac[0];
956 (*secfilter)->filter_mask[0] = 0xff;
957 (*secfilter)->filter_mask[3] = mac_mask[5];
958 (*secfilter)->filter_mask[4] = mac_mask[4];
959 (*secfilter)->filter_mask[8] = mac_mask[3];
960 (*secfilter)->filter_mask[9] = mac_mask[2];
961 (*secfilter)->filter_mask[10] = mac_mask[1];
962 (*secfilter)->filter_mask[11]=mac_mask[0];
964 dprintk("%s: filter mac=%pM\n", dev->name, mac);
965 dprintk("%s: filter mask=%pM\n", dev->name, mac_mask);
970 static int dvb_net_feed_start(struct net_device *dev)
973 struct dvb_net_priv *priv = netdev_priv(dev);
974 struct dmx_demux *demux = priv->demux;
975 unsigned char *mac = (unsigned char *) dev->dev_addr;
977 dprintk("%s: rx_mode %i\n", __func__, priv->rx_mode);
978 mutex_lock(&priv->mutex);
979 if (priv->tsfeed || priv->secfeed || priv->secfilter || priv->multi_secfilter[0])
980 printk("%s: BUG %d\n", __func__, __LINE__);
983 priv->secfilter=NULL;
986 if (priv->feedtype == DVB_NET_FEEDTYPE_MPE) {
987 dprintk("%s: alloc secfeed\n", __func__);
988 ret=demux->allocate_section_feed(demux, &priv->secfeed,
989 dvb_net_sec_callback);
991 printk("%s: could not allocate section feed\n", dev->name);
995 ret = priv->secfeed->set(priv->secfeed, priv->pid, 32768, 1);
998 printk("%s: could not set section feed\n", dev->name);
999 priv->demux->release_section_feed(priv->demux, priv->secfeed);
1004 if (priv->rx_mode != RX_MODE_PROMISC) {
1005 dprintk("%s: set secfilter\n", __func__);
1006 dvb_net_filter_sec_set(dev, &priv->secfilter, mac, mask_normal);
1009 switch (priv->rx_mode) {
1011 for (i = 0; i < priv->multi_num; i++) {
1012 dprintk("%s: set multi_secfilter[%d]\n", __func__, i);
1013 dvb_net_filter_sec_set(dev, &priv->multi_secfilter[i],
1014 priv->multi_macs[i], mask_normal);
1017 case RX_MODE_ALL_MULTI:
1019 dprintk("%s: set multi_secfilter[0]\n", __func__);
1020 dvb_net_filter_sec_set(dev, &priv->multi_secfilter[0],
1021 mac_allmulti, mask_allmulti);
1023 case RX_MODE_PROMISC:
1025 dprintk("%s: set secfilter\n", __func__);
1026 dvb_net_filter_sec_set(dev, &priv->secfilter, mac, mask_promisc);
1030 dprintk("%s: start filtering\n", __func__);
1031 priv->secfeed->start_filtering(priv->secfeed);
1032 } else if (priv->feedtype == DVB_NET_FEEDTYPE_ULE) {
1033 struct timespec timeout = { 0, 10000000 }; // 10 msec
1035 /* we have payloads encapsulated in TS */
1036 dprintk("%s: alloc tsfeed\n", __func__);
1037 ret = demux->allocate_ts_feed(demux, &priv->tsfeed, dvb_net_ts_callback);
1039 printk("%s: could not allocate ts feed\n", dev->name);
1043 /* Set netdevice pointer for ts decaps callback. */
1044 priv->tsfeed->priv = (void *)dev;
1045 ret = priv->tsfeed->set(priv->tsfeed,
1046 priv->pid, /* pid */
1047 TS_PACKET, /* type */
1048 DMX_TS_PES_OTHER, /* pes type */
1049 32768, /* circular buffer size */
1050 timeout /* timeout */
1054 printk("%s: could not set ts feed\n", dev->name);
1055 priv->demux->release_ts_feed(priv->demux, priv->tsfeed);
1056 priv->tsfeed = NULL;
1060 dprintk("%s: start filtering\n", __func__);
1061 priv->tsfeed->start_filtering(priv->tsfeed);
1066 mutex_unlock(&priv->mutex);
1070 static int dvb_net_feed_stop(struct net_device *dev)
1072 struct dvb_net_priv *priv = netdev_priv(dev);
1075 dprintk("%s\n", __func__);
1076 mutex_lock(&priv->mutex);
1077 if (priv->feedtype == DVB_NET_FEEDTYPE_MPE) {
1078 if (priv->secfeed) {
1079 if (priv->secfeed->is_filtering) {
1080 dprintk("%s: stop secfeed\n", __func__);
1081 priv->secfeed->stop_filtering(priv->secfeed);
1084 if (priv->secfilter) {
1085 dprintk("%s: release secfilter\n", __func__);
1086 priv->secfeed->release_filter(priv->secfeed,
1088 priv->secfilter=NULL;
1091 for (i=0; i<priv->multi_num; i++) {
1092 if (priv->multi_secfilter[i]) {
1093 dprintk("%s: release multi_filter[%d]\n",
1095 priv->secfeed->release_filter(priv->secfeed,
1096 priv->multi_secfilter[i]);
1097 priv->multi_secfilter[i] = NULL;
1101 priv->demux->release_section_feed(priv->demux, priv->secfeed);
1102 priv->secfeed = NULL;
1104 printk("%s: no feed to stop\n", dev->name);
1105 } else if (priv->feedtype == DVB_NET_FEEDTYPE_ULE) {
1107 if (priv->tsfeed->is_filtering) {
1108 dprintk("%s: stop tsfeed\n", __func__);
1109 priv->tsfeed->stop_filtering(priv->tsfeed);
1111 priv->demux->release_ts_feed(priv->demux, priv->tsfeed);
1112 priv->tsfeed = NULL;
1115 printk("%s: no ts feed to stop\n", dev->name);
1118 mutex_unlock(&priv->mutex);
1123 static int dvb_set_mc_filter(struct net_device *dev, unsigned char *addr)
1125 struct dvb_net_priv *priv = netdev_priv(dev);
1127 if (priv->multi_num == DVB_NET_MULTICAST_MAX)
1130 memcpy(priv->multi_macs[priv->multi_num], addr, ETH_ALEN);
1137 static void wq_set_multicast_list (struct work_struct *work)
1139 struct dvb_net_priv *priv =
1140 container_of(work, struct dvb_net_priv, set_multicast_list_wq);
1141 struct net_device *dev = priv->net;
1143 dvb_net_feed_stop(dev);
1144 priv->rx_mode = RX_MODE_UNI;
1145 netif_addr_lock_bh(dev);
1147 if (dev->flags & IFF_PROMISC) {
1148 dprintk("%s: promiscuous mode\n", dev->name);
1149 priv->rx_mode = RX_MODE_PROMISC;
1150 } else if ((dev->flags & IFF_ALLMULTI)) {
1151 dprintk("%s: allmulti mode\n", dev->name);
1152 priv->rx_mode = RX_MODE_ALL_MULTI;
1153 } else if (!netdev_mc_empty(dev)) {
1154 struct netdev_hw_addr *ha;
1156 dprintk("%s: set_mc_list, %d entries\n",
1157 dev->name, netdev_mc_count(dev));
1159 priv->rx_mode = RX_MODE_MULTI;
1160 priv->multi_num = 0;
1162 netdev_for_each_mc_addr(ha, dev)
1163 dvb_set_mc_filter(dev, ha->addr);
1166 netif_addr_unlock_bh(dev);
1167 dvb_net_feed_start(dev);
1171 static void dvb_net_set_multicast_list (struct net_device *dev)
1173 struct dvb_net_priv *priv = netdev_priv(dev);
1174 schedule_work(&priv->set_multicast_list_wq);
1178 static void wq_restart_net_feed (struct work_struct *work)
1180 struct dvb_net_priv *priv =
1181 container_of(work, struct dvb_net_priv, restart_net_feed_wq);
1182 struct net_device *dev = priv->net;
1184 if (netif_running(dev)) {
1185 dvb_net_feed_stop(dev);
1186 dvb_net_feed_start(dev);
1191 static int dvb_net_set_mac (struct net_device *dev, void *p)
1193 struct dvb_net_priv *priv = netdev_priv(dev);
1194 struct sockaddr *addr=p;
1196 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1198 if (netif_running(dev))
1199 schedule_work(&priv->restart_net_feed_wq);
1205 static int dvb_net_open(struct net_device *dev)
1207 struct dvb_net_priv *priv = netdev_priv(dev);
1210 dvb_net_feed_start(dev);
1215 static int dvb_net_stop(struct net_device *dev)
1217 struct dvb_net_priv *priv = netdev_priv(dev);
1220 return dvb_net_feed_stop(dev);
1223 static const struct header_ops dvb_header_ops = {
1224 .create = eth_header,
1225 .parse = eth_header_parse,
1226 .rebuild = eth_rebuild_header,
1230 static const struct net_device_ops dvb_netdev_ops = {
1231 .ndo_open = dvb_net_open,
1232 .ndo_stop = dvb_net_stop,
1233 .ndo_start_xmit = dvb_net_tx,
1234 .ndo_set_multicast_list = dvb_net_set_multicast_list,
1235 .ndo_set_mac_address = dvb_net_set_mac,
1236 .ndo_change_mtu = eth_change_mtu,
1237 .ndo_validate_addr = eth_validate_addr,
1240 static void dvb_net_setup(struct net_device *dev)
1244 dev->header_ops = &dvb_header_ops;
1245 dev->netdev_ops = &dvb_netdev_ops;
1248 dev->flags |= IFF_NOARP;
1251 static int get_if(struct dvb_net *dvbnet)
1255 for (i=0; i<DVB_NET_DEVICES_MAX; i++)
1256 if (!dvbnet->state[i])
1259 if (i == DVB_NET_DEVICES_MAX)
1266 static int dvb_net_add_if(struct dvb_net *dvbnet, u16 pid, u8 feedtype)
1268 struct net_device *net;
1269 struct dvb_net_priv *priv;
1273 if (feedtype != DVB_NET_FEEDTYPE_MPE && feedtype != DVB_NET_FEEDTYPE_ULE)
1275 if ((if_num = get_if(dvbnet)) < 0)
1278 net = alloc_netdev(sizeof(struct dvb_net_priv), "dvb", dvb_net_setup);
1282 if (dvbnet->dvbdev->id)
1283 snprintf(net->name, IFNAMSIZ, "dvb%d%u%d",
1284 dvbnet->dvbdev->adapter->num, dvbnet->dvbdev->id, if_num);
1286 /* compatibility fix to keep dvb0_0 format */
1287 snprintf(net->name, IFNAMSIZ, "dvb%d_%d",
1288 dvbnet->dvbdev->adapter->num, if_num);
1291 memcpy(net->dev_addr, dvbnet->dvbdev->adapter->proposed_mac, 6);
1293 dvbnet->device[if_num] = net;
1295 priv = netdev_priv(net);
1297 priv->demux = dvbnet->demux;
1299 priv->rx_mode = RX_MODE_UNI;
1300 priv->need_pusi = 1;
1302 priv->feedtype = feedtype;
1305 INIT_WORK(&priv->set_multicast_list_wq, wq_set_multicast_list);
1306 INIT_WORK(&priv->restart_net_feed_wq, wq_restart_net_feed);
1307 mutex_init(&priv->mutex);
1309 net->base_addr = pid;
1311 if ((result = register_netdev(net)) < 0) {
1312 dvbnet->device[if_num] = NULL;
1316 printk("dvb_net: created network interface %s\n", net->name);
1321 static int dvb_net_remove_if(struct dvb_net *dvbnet, unsigned long num)
1323 struct net_device *net = dvbnet->device[num];
1324 struct dvb_net_priv *priv;
1326 if (!dvbnet->state[num])
1328 priv = netdev_priv(net);
1333 flush_scheduled_work();
1334 printk("dvb_net: removed network interface %s\n", net->name);
1335 unregister_netdev(net);
1336 dvbnet->state[num]=0;
1337 dvbnet->device[num] = NULL;
1343 static int dvb_net_do_ioctl(struct file *file,
1344 unsigned int cmd, void *parg)
1346 struct dvb_device *dvbdev = file->private_data;
1347 struct dvb_net *dvbnet = dvbdev->priv;
1349 if (((file->f_flags&O_ACCMODE)==O_RDONLY))
1355 struct dvb_net_if *dvbnetif = parg;
1358 if (!capable(CAP_SYS_ADMIN))
1361 if (!try_module_get(dvbdev->adapter->module))
1364 result=dvb_net_add_if(dvbnet, dvbnetif->pid, dvbnetif->feedtype);
1366 module_put(dvbdev->adapter->module);
1369 dvbnetif->if_num=result;
1374 struct net_device *netdev;
1375 struct dvb_net_priv *priv_data;
1376 struct dvb_net_if *dvbnetif = parg;
1378 if (dvbnetif->if_num >= DVB_NET_DEVICES_MAX ||
1379 !dvbnet->state[dvbnetif->if_num])
1382 netdev = dvbnet->device[dvbnetif->if_num];
1384 priv_data = netdev_priv(netdev);
1385 dvbnetif->pid=priv_data->pid;
1386 dvbnetif->feedtype=priv_data->feedtype;
1393 if (!capable(CAP_SYS_ADMIN))
1395 if ((unsigned long) parg >= DVB_NET_DEVICES_MAX)
1397 ret = dvb_net_remove_if(dvbnet, (unsigned long) parg);
1399 module_put(dvbdev->adapter->module);
1403 /* binary compatibility cruft */
1404 case __NET_ADD_IF_OLD:
1406 struct __dvb_net_if_old *dvbnetif = parg;
1409 if (!capable(CAP_SYS_ADMIN))
1412 if (!try_module_get(dvbdev->adapter->module))
1415 result=dvb_net_add_if(dvbnet, dvbnetif->pid, DVB_NET_FEEDTYPE_MPE);
1417 module_put(dvbdev->adapter->module);
1420 dvbnetif->if_num=result;
1423 case __NET_GET_IF_OLD:
1425 struct net_device *netdev;
1426 struct dvb_net_priv *priv_data;
1427 struct __dvb_net_if_old *dvbnetif = parg;
1429 if (dvbnetif->if_num >= DVB_NET_DEVICES_MAX ||
1430 !dvbnet->state[dvbnetif->if_num])
1433 netdev = dvbnet->device[dvbnetif->if_num];
1435 priv_data = netdev_priv(netdev);
1436 dvbnetif->pid=priv_data->pid;
1445 static long dvb_net_ioctl(struct file *file,
1446 unsigned int cmd, unsigned long arg)
1451 ret = dvb_usercopy(file, cmd, arg, dvb_net_do_ioctl);
1457 static int dvb_net_close(struct inode *inode, struct file *file)
1459 struct dvb_device *dvbdev = file->private_data;
1460 struct dvb_net *dvbnet = dvbdev->priv;
1462 dvb_generic_release(inode, file);
1464 if(dvbdev->users == 1 && dvbnet->exit == 1) {
1465 fops_put(file->f_op);
1467 wake_up(&dvbdev->wait_queue);
1473 static const struct file_operations dvb_net_fops = {
1474 .owner = THIS_MODULE,
1475 .unlocked_ioctl = dvb_net_ioctl,
1476 .open = dvb_generic_open,
1477 .release = dvb_net_close,
1480 static struct dvb_device dvbdev_net = {
1484 .fops = &dvb_net_fops,
1488 void dvb_net_release (struct dvb_net *dvbnet)
1493 if (dvbnet->dvbdev->users < 1)
1494 wait_event(dvbnet->dvbdev->wait_queue,
1495 dvbnet->dvbdev->users==1);
1497 dvb_unregister_device(dvbnet->dvbdev);
1499 for (i=0; i<DVB_NET_DEVICES_MAX; i++) {
1500 if (!dvbnet->state[i])
1502 dvb_net_remove_if(dvbnet, i);
1505 EXPORT_SYMBOL(dvb_net_release);
1508 int dvb_net_init (struct dvb_adapter *adap, struct dvb_net *dvbnet,
1509 struct dmx_demux *dmx)
1513 dvbnet->demux = dmx;
1515 for (i=0; i<DVB_NET_DEVICES_MAX; i++)
1516 dvbnet->state[i] = 0;
1518 dvb_register_device (adap, &dvbnet->dvbdev, &dvbdev_net,
1519 dvbnet, DVB_DEVICE_NET);
1523 EXPORT_SYMBOL(dvb_net_init);