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 draft-ietf-ipdvb-ule-03.txt.
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.
48 * FIXME / TODO (dvb_net.c):
50 * Unloading does not work for 2.6.9 kernels: a refcount doesn't go to zero.
52 * TS_FEED callback is called once for every single TS cell although it is
53 * registered (in dvb_net_feed_start()) for 100 TS cells (used for dvb_net_ule()).
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/uio.h>
63 #include <asm/uaccess.h>
64 #include <linux/crc32.h>
66 #include "dvb_demux.h"
69 static int dvb_net_debug;
70 module_param(dvb_net_debug, int, 0444);
71 MODULE_PARM_DESC(dvb_net_debug, "enable debug messages");
73 #define dprintk(x...) do { if (dvb_net_debug) printk(x); } while (0)
76 static inline __u32 iov_crc32( __u32 c, struct kvec *iov, unsigned int cnt )
79 for (j = 0; j < cnt; j++)
80 c = crc32_be( c, iov[j].iov_base, iov[j].iov_len );
85 #define DVB_NET_MULTICAST_MAX 10
91 #define isprint(c) ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || (c >= '0' && c <= '9'))
93 static void hexdump( const unsigned char *buf, unsigned short len )
95 char str[80], octet[10];
98 for (ofs = 0; ofs < len; ofs += 16) {
99 sprintf( str, "%03d: ", ofs );
101 for (i = 0; i < 16; i++) {
103 sprintf( octet, "%02x ", buf[ofs + i] );
105 strcpy( octet, " " );
107 strcat( str, octet );
112 for (i = 0; (i < 16) && ((i + ofs) < len); i++)
113 str[l++] = isprint( buf[ofs + i] ) ? buf[ofs + i] : '.';
116 printk( KERN_WARNING "%s\n", str );
122 struct dvb_net_priv {
124 struct net_device_stats stats;
126 struct dvb_net *host;
127 struct dmx_demux *demux;
128 struct dmx_section_feed *secfeed;
129 struct dmx_section_filter *secfilter;
130 struct dmx_ts_feed *tsfeed;
132 struct dmx_section_filter *multi_secfilter[DVB_NET_MULTICAST_MAX];
133 unsigned char multi_macs[DVB_NET_MULTICAST_MAX][6];
135 #define RX_MODE_UNI 0
136 #define RX_MODE_MULTI 1
137 #define RX_MODE_ALL_MULTI 2
138 #define RX_MODE_PROMISC 3
139 struct work_struct set_multicast_list_wq;
140 struct work_struct restart_net_feed_wq;
141 unsigned char feedtype; /* Either FEED_TYPE_ or FEED_TYPE_ULE */
142 int need_pusi; /* Set to 1, if synchronization on PUSI required. */
143 unsigned char tscc; /* TS continuity counter after sync on PUSI. */
144 struct sk_buff *ule_skb; /* ULE SNDU decodes into this buffer. */
145 unsigned char *ule_next_hdr; /* Pointer into skb to next ULE extension header. */
146 unsigned short ule_sndu_len; /* ULE SNDU length in bytes, w/o D-Bit. */
147 unsigned short ule_sndu_type; /* ULE SNDU type field, complete. */
148 unsigned char ule_sndu_type_1; /* ULE SNDU type field, if split across 2 TS cells. */
149 unsigned char ule_dbit; /* Whether the DestMAC address present
150 * or not (bit is set). */
151 unsigned char ule_bridged; /* Whether the ULE_BRIDGED extension header was found. */
152 int ule_sndu_remain; /* Nr. of bytes still required for current ULE SNDU. */
153 unsigned long ts_count; /* Current ts cell counter. */
155 struct semaphore mutex;
160 * Determine the packet's protocol ID. The rule here is that we
161 * assume 802.3 if the type field is short enough to be a length.
162 * This is normal practice and works for any 'now in use' protocol.
164 * stolen from eth.c out of the linux kernel, hacked for dvb-device
165 * by Michael Holzt <kju@debian.org>
167 static unsigned short dvb_net_eth_type_trans(struct sk_buff *skb,
168 struct net_device *dev)
173 skb->mac.raw=skb->data;
174 skb_pull(skb,dev->hard_header_len);
177 if (*eth->h_dest & 1) {
178 if(memcmp(eth->h_dest,dev->broadcast, ETH_ALEN)==0)
179 skb->pkt_type=PACKET_BROADCAST;
181 skb->pkt_type=PACKET_MULTICAST;
184 if (ntohs(eth->h_proto) >= 1536)
190 * This is a magic hack to spot IPX packets. Older Novell breaks
191 * the protocol design and runs IPX over 802.3 without an 802.2 LLC
192 * layer. We look for FFFF which isn't a used 802.2 SSAP/DSAP. This
193 * won't work for fault tolerant netware but does for the rest.
195 if (*(unsigned short *)rawp == 0xFFFF)
196 return htons(ETH_P_802_3);
201 return htons(ETH_P_802_2);
212 /* ULE Extension Header handlers. */
215 #define ULE_BRIDGED 1
217 static int ule_test_sndu( struct dvb_net_priv *p )
222 static int ule_bridged_sndu( struct dvb_net_priv *p )
224 /* BRIDGE SNDU handling sucks in draft-ietf-ipdvb-ule-03.txt.
225 * This has to be the last extension header, otherwise it won't work.
233 /** Handle ULE extension headers.
234 * Function is called after a successful CRC32 verification of an ULE SNDU to complete its decoding.
235 * Returns: >= 0: nr. of bytes consumed by next extension header
236 * -1: Mandatory extension header that is not recognized or TEST SNDU; discard.
238 static int handle_one_ule_extension( struct dvb_net_priv *p )
240 /* Table of mandatory extension header handlers. The header type is the index. */
241 static int (*ule_mandatory_ext_handlers[255])( struct dvb_net_priv *p ) =
242 { [0] = ule_test_sndu, [1] = ule_bridged_sndu, [2] = NULL, };
244 /* Table of optional extension header handlers. The header type is the index. */
245 static int (*ule_optional_ext_handlers[255])( struct dvb_net_priv *p ) = { NULL, };
248 unsigned char hlen = (p->ule_sndu_type & 0x0700) >> 8;
249 unsigned char htype = p->ule_sndu_type & 0x00FF;
251 /* Discriminate mandatory and optional extension headers. */
253 /* Mandatory extension header */
254 if (ule_mandatory_ext_handlers[htype]) {
255 ext_len = ule_mandatory_ext_handlers[htype]( p );
256 p->ule_next_hdr += ext_len;
257 if (! p->ule_bridged) {
258 p->ule_sndu_type = ntohs( *(unsigned short *)p->ule_next_hdr );
259 p->ule_next_hdr += 2;
261 p->ule_sndu_type = ntohs( *(unsigned short *)(p->ule_next_hdr + ((p->ule_dbit ? 2 : 3) * ETH_ALEN)) );
262 /* This assures the extension handling loop will terminate. */
265 ext_len = -1; /* SNDU has to be discarded. */
267 /* Optional extension header. Calculate the length. */
269 /* Process the optional extension header according to its type. */
270 if (ule_optional_ext_handlers[htype])
271 (void)ule_optional_ext_handlers[htype]( p );
272 p->ule_next_hdr += ext_len;
273 p->ule_sndu_type = ntohs( *(unsigned short *)p->ule_next_hdr );
274 p->ule_next_hdr += 2;
280 static int handle_ule_extensions( struct dvb_net_priv *p )
282 int total_ext_len = 0, l;
284 p->ule_next_hdr = p->ule_skb->data;
286 l = handle_one_ule_extension( p );
287 if (l == -1) return -1; /* Stop extension header processing and discard SNDU. */
290 } while (p->ule_sndu_type < 1536);
292 return total_ext_len;
296 /** Prepare for a new ULE SNDU: reset the decoder state. */
297 static inline void reset_ule( struct dvb_net_priv *p )
300 p->ule_next_hdr = NULL;
302 p->ule_sndu_type = 0;
303 p->ule_sndu_type_1 = 0;
304 p->ule_sndu_remain = 0;
310 * Decode ULE SNDUs according to draft-ietf-ipdvb-ule-03.txt from a sequence of
311 * TS cells of a single PID.
313 static void dvb_net_ule( struct net_device *dev, const u8 *buf, size_t buf_len )
315 struct dvb_net_priv *priv = dev->priv;
316 unsigned long skipped = 0L;
317 u8 *ts, *ts_end, *from_where = NULL, ts_remain = 0, how_much = 0, new_ts = 1;
318 struct ethhdr *ethh = NULL;
321 /* The code inside ULE_DEBUG keeps a history of the last 100 TS cells processed. */
322 static unsigned char ule_hist[100*TS_SZ];
323 static unsigned char *ule_where = ule_hist, ule_dump = 0;
327 printk( KERN_ERR "NO netdev struct!\n" );
331 /* For all TS cells in current buffer.
332 * Appearently, we are called for every single TS cell.
334 for (ts = (char *)buf, ts_end = (char *)buf + buf_len; ts < ts_end; /* no default incr. */ ) {
337 /* We are about to process a new TS cell. */
340 if (ule_where >= &ule_hist[100*TS_SZ]) ule_where = ule_hist;
341 memcpy( ule_where, ts, TS_SZ );
343 hexdump( ule_where, TS_SZ );
349 /* Check TS error conditions: sync_byte, transport_error_indicator, scrambling_control . */
350 if ((ts[0] != TS_SYNC) || (ts[1] & TS_TEI) || ((ts[3] & TS_SC) != 0)) {
351 printk(KERN_WARNING "%lu: Invalid TS cell: SYNC %#x, TEI %u, SC %#x.\n",
352 priv->ts_count, ts[0], ts[1] & TS_TEI >> 7, ts[3] & 0xC0 >> 6);
354 /* Drop partly decoded SNDU, reset state, resync on PUSI. */
356 dev_kfree_skb( priv->ule_skb );
357 /* Prepare for next SNDU. */
358 ((struct dvb_net_priv *) dev->priv)->stats.rx_errors++;
359 ((struct dvb_net_priv *) dev->priv)->stats.rx_frame_errors++;
364 /* Continue with next TS cell. */
373 /* Synchronize on PUSI, if required. */
374 if (priv->need_pusi) {
375 if (ts[1] & TS_PUSI) {
376 /* Find beginning of first ULE SNDU in current TS cell. */
377 /* Synchronize continuity counter. */
378 priv->tscc = ts[3] & 0x0F;
379 /* There is a pointer field here. */
380 if (ts[4] > ts_remain) {
381 printk(KERN_ERR "%lu: Invalid ULE packet "
382 "(pointer field %d)\n", priv->ts_count, ts[4]);
387 /* Skip to destination of pointer field. */
388 from_where = &ts[5] + ts[4];
389 ts_remain -= 1 + ts[4];
399 /* Check continuity counter. */
401 if ((ts[3] & 0x0F) == priv->tscc)
402 priv->tscc = (priv->tscc + 1) & 0x0F;
404 /* TS discontinuity handling: */
405 printk(KERN_WARNING "%lu: TS discontinuity: got %#x, "
406 "exptected %#x.\n", priv->ts_count, ts[3] & 0x0F, priv->tscc);
407 /* Drop partly decoded SNDU, reset state, resync on PUSI. */
409 dev_kfree_skb( priv->ule_skb );
410 /* Prepare for next SNDU. */
411 // reset_ule(priv); moved to below.
412 ((struct dvb_net_priv *) dev->priv)->stats.rx_errors++;
413 ((struct dvb_net_priv *) dev->priv)->stats.rx_frame_errors++;
416 /* skip to next PUSI. */
422 /* If we still have an incomplete payload, but PUSI is
423 * set; some TS cells are missing.
424 * This is only possible here, if we missed exactly 16 TS
425 * cells (continuity counter wrap). */
426 if (ts[1] & TS_PUSI) {
427 if (! priv->need_pusi) {
428 if (*from_where > 181) {
429 /* Pointer field is invalid. Drop this TS cell and any started ULE SNDU. */
430 printk(KERN_WARNING "%lu: Invalid pointer "
431 "field: %u.\n", priv->ts_count, *from_where);
433 /* Drop partly decoded SNDU, reset state, resync on PUSI. */
435 dev_kfree_skb( priv->ule_skb );
436 ((struct dvb_net_priv *) dev->priv)->stats.rx_errors++;
437 ((struct dvb_net_priv *) dev->priv)->stats.rx_frame_errors++;
445 /* Skip pointer field (we're processing a
446 * packed payload). */
452 if (priv->ule_sndu_remain > 183) {
453 /* Current SNDU lacks more data than there could be available in the
454 * current TS cell. */
455 ((struct dvb_net_priv *) dev->priv)->stats.rx_errors++;
456 ((struct dvb_net_priv *) dev->priv)->stats.rx_length_errors++;
457 printk(KERN_WARNING "%lu: Expected %d more SNDU bytes, but "
458 "got PUSI (pf %d, ts_remain %d). Flushing incomplete payload.\n",
459 priv->ts_count, priv->ule_sndu_remain, ts[4], ts_remain);
460 dev_kfree_skb(priv->ule_skb);
461 /* Prepare for next SNDU. */
463 /* Resync: go to where pointer field points to: start of next ULE SNDU. */
470 /* Check if new payload needs to be started. */
471 if (priv->ule_skb == NULL) {
472 /* Start a new payload with skb.
473 * Find ULE header. It is only guaranteed that the
474 * length field (2 bytes) is contained in the current
476 * Check ts_remain has to be >= 2 here. */
478 printk(KERN_WARNING "Invalid payload packing: only %d "
479 "bytes left in TS. Resyncing.\n", ts_remain);
480 priv->ule_sndu_len = 0;
485 if (! priv->ule_sndu_len) {
486 /* Got at least two bytes, thus extrace the SNDU length. */
487 priv->ule_sndu_len = from_where[0] << 8 | from_where[1];
488 if (priv->ule_sndu_len & 0x8000) {
489 /* D-Bit is set: no dest mac present. */
490 priv->ule_sndu_len &= 0x7FFF;
495 if (priv->ule_sndu_len > 32763 ||
496 priv->ule_sndu_len < ((priv->ule_dbit) ? 4 : 4 + ETH_ALEN)) {
497 printk(KERN_WARNING "%lu: Invalid ULE SNDU length %u. "
498 "Resyncing.\n", priv->ts_count, priv->ule_sndu_len);
499 priv->ule_sndu_len = 0;
506 ts_remain -= 2; /* consume the 2 bytes SNDU length. */
511 * State of current TS:
512 * ts_remain (remaining bytes in the current TS cell)
513 * 0 ule_type is not available now, we need the next TS cell
514 * 1 the first byte of the ule_type is present
515 * >=2 full ULE header present, maybe some payload data as well.
519 priv->ule_sndu_type = from_where[0] << 8;
520 priv->ule_sndu_type_1 = 1; /* first byte of ule_type is set. */
521 ts_remain -= 1; from_where += 1;
522 /* Continue w/ next TS. */
529 default: /* complete ULE header is present in current TS. */
530 /* Extract ULE type field. */
531 if (priv->ule_sndu_type_1) {
532 priv->ule_sndu_type |= from_where[0];
533 from_where += 1; /* points to payload start. */
536 /* Complete type is present in new TS. */
537 priv->ule_sndu_type = from_where[0] << 8 | from_where[1];
538 from_where += 2; /* points to payload start. */
544 /* Allocate the skb (decoder target buffer) with the correct size, as follows:
545 * prepare for the largest case: bridged SNDU with MAC address (dbit = 0). */
546 priv->ule_skb = dev_alloc_skb( priv->ule_sndu_len + ETH_HLEN + ETH_ALEN );
547 if (priv->ule_skb == NULL) {
548 printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n",
550 ((struct dvb_net_priv *)dev->priv)->stats.rx_dropped++;
554 /* This includes the CRC32 _and_ dest mac, if !dbit. */
555 priv->ule_sndu_remain = priv->ule_sndu_len;
556 priv->ule_skb->dev = dev;
557 /* Leave space for Ethernet or bridged SNDU header (eth hdr plus one MAC addr). */
558 skb_reserve( priv->ule_skb, ETH_HLEN + ETH_ALEN );
561 /* Copy data into our current skb. */
562 how_much = min(priv->ule_sndu_remain, (int)ts_remain);
563 memcpy(skb_put(priv->ule_skb, how_much), from_where, how_much);
564 priv->ule_sndu_remain -= how_much;
565 ts_remain -= how_much;
566 from_where += how_much;
568 /* Check for complete payload. */
569 if (priv->ule_sndu_remain <= 0) {
570 /* Check CRC32, we've got it in our skb already. */
571 unsigned short ulen = htons(priv->ule_sndu_len);
572 unsigned short utype = htons(priv->ule_sndu_type);
573 struct kvec iov[3] = {
574 { &ulen, sizeof ulen },
575 { &utype, sizeof utype },
576 { priv->ule_skb->data, priv->ule_skb->len - 4 }
578 unsigned long ule_crc = ~0L, expected_crc;
579 if (priv->ule_dbit) {
580 /* Set D-bit for CRC32 verification,
581 * if it was set originally. */
585 ule_crc = iov_crc32(ule_crc, iov, 3);
586 expected_crc = *((u8 *)priv->ule_skb->tail - 4) << 24 |
587 *((u8 *)priv->ule_skb->tail - 3) << 16 |
588 *((u8 *)priv->ule_skb->tail - 2) << 8 |
589 *((u8 *)priv->ule_skb->tail - 1);
590 if (ule_crc != expected_crc) {
591 printk(KERN_WARNING "%lu: CRC32 check FAILED: %#lx / %#lx, SNDU len %d type %#x, ts_remain %d, next 2: %x.\n",
592 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);
595 hexdump( iov[0].iov_base, iov[0].iov_len );
596 hexdump( iov[1].iov_base, iov[1].iov_len );
597 hexdump( iov[2].iov_base, iov[2].iov_len );
599 if (ule_where == ule_hist) {
600 hexdump( &ule_hist[98*TS_SZ], TS_SZ );
601 hexdump( &ule_hist[99*TS_SZ], TS_SZ );
602 } else if (ule_where == &ule_hist[TS_SZ]) {
603 hexdump( &ule_hist[99*TS_SZ], TS_SZ );
604 hexdump( ule_hist, TS_SZ );
606 hexdump( ule_where - TS_SZ - TS_SZ, TS_SZ );
607 hexdump( ule_where - TS_SZ, TS_SZ );
612 ((struct dvb_net_priv *) dev->priv)->stats.rx_errors++;
613 ((struct dvb_net_priv *) dev->priv)->stats.rx_crc_errors++;
614 dev_kfree_skb(priv->ule_skb);
616 /* CRC32 verified OK. */
617 /* Handle ULE Extension Headers. */
618 if (priv->ule_sndu_type < 1536) {
619 /* There is an extension header. Handle it accordingly. */
620 int l = handle_ule_extensions( priv );
622 /* Mandatory extension header unknown or TEST SNDU. Drop it. */
623 // printk( KERN_WARNING "Dropping SNDU, extension headers.\n" );
624 dev_kfree_skb( priv->ule_skb );
627 skb_pull( priv->ule_skb, l );
630 /* CRC32 was OK. Remove it from skb. */
631 priv->ule_skb->tail -= 4;
632 priv->ule_skb->len -= 4;
634 /* Filter on receiver's destination MAC address, if present. */
635 if (!priv->ule_dbit) {
636 /* The destination MAC address is the next data in the skb. */
637 if (memcmp( priv->ule_skb->data, dev->dev_addr, ETH_ALEN )) {
638 /* MAC addresses don't match. Drop SNDU. */
639 // printk( KERN_WARNING "Dropping SNDU, MAC address.\n" );
640 dev_kfree_skb( priv->ule_skb );
643 if (! priv->ule_bridged) {
644 skb_push( priv->ule_skb, ETH_ALEN + 2 );
645 ethh = (struct ethhdr *)priv->ule_skb->data;
646 memcpy( ethh->h_dest, ethh->h_source, ETH_ALEN );
647 memset( ethh->h_source, 0, ETH_ALEN );
648 ethh->h_proto = htons( priv->ule_sndu_type );
650 /* Skip the Receiver destination MAC address. */
651 skb_pull( priv->ule_skb, ETH_ALEN );
654 if (! priv->ule_bridged) {
655 skb_push( priv->ule_skb, ETH_HLEN );
656 ethh = (struct ethhdr *)priv->ule_skb->data;
657 memcpy( ethh->h_dest, dev->dev_addr, ETH_ALEN );
658 memset( ethh->h_source, 0, ETH_ALEN );
659 ethh->h_proto = htons( priv->ule_sndu_type );
661 /* skb is in correct state; nothing to do. */
664 priv->ule_bridged = 0;
666 /* Stuff into kernel's protocol stack. */
667 priv->ule_skb->protocol = dvb_net_eth_type_trans(priv->ule_skb, dev);
668 /* If D-bit is set (i.e. destination MAC address not present),
669 * receive the packet anyhow. */
670 /* if (priv->ule_dbit && skb->pkt_type == PACKET_OTHERHOST)
671 priv->ule_skb->pkt_type = PACKET_HOST; */
672 ((struct dvb_net_priv *) dev->priv)->stats.rx_packets++;
673 ((struct dvb_net_priv *) dev->priv)->stats.rx_bytes += priv->ule_skb->len;
674 netif_rx(priv->ule_skb);
677 /* Prepare for next SNDU. */
681 /* More data in current TS (look at the bytes following the CRC32)? */
682 if (ts_remain >= 2 && *((unsigned short *)from_where) != 0xFFFF) {
683 /* Next ULE SNDU starts right there. */
685 priv->ule_skb = NULL;
686 priv->ule_sndu_type_1 = 0;
687 priv->ule_sndu_len = 0;
688 // printk(KERN_WARNING "More data in current TS: [%#x %#x %#x %#x]\n",
689 // *(from_where + 0), *(from_where + 1),
690 // *(from_where + 2), *(from_where + 3));
691 // printk(KERN_WARNING "ts @ %p, stopped @ %p:\n", ts, from_where + 0);
697 if (priv->ule_skb == NULL) {
699 priv->ule_sndu_type_1 = 0;
700 priv->ule_sndu_len = 0;
703 } /* for all available TS cells */
706 static int dvb_net_ts_callback(const u8 *buffer1, size_t buffer1_len,
707 const u8 *buffer2, size_t buffer2_len,
708 struct dmx_ts_feed *feed, enum dmx_success success)
710 struct net_device *dev = feed->priv;
713 printk(KERN_WARNING "buffer2 not 0: %p.\n", buffer2);
714 if (buffer1_len > 32768)
715 printk(KERN_WARNING "length > 32k: %zu.\n", buffer1_len);
716 /* printk("TS callback: %u bytes, %u TS cells @ %p.\n",
717 buffer1_len, buffer1_len / TS_SZ, buffer1); */
718 dvb_net_ule(dev, buffer1, buffer1_len);
723 static void dvb_net_sec(struct net_device *dev, u8 *pkt, int pkt_len)
727 struct net_device_stats *stats = &(((struct dvb_net_priv *) dev->priv)->stats);
730 /* note: pkt_len includes a 32bit checksum */
732 printk("%s: IP/MPE packet length = %d too small.\n",
735 stats->rx_length_errors++;
738 /* it seems some ISPs manage to screw up here, so we have to
739 * relax the error checks... */
741 if ((pkt[5] & 0xfd) != 0xc1) {
742 /* drop scrambled or broken packets */
744 if ((pkt[5] & 0x3c) != 0x00) {
748 stats->rx_crc_errors++;
752 /* handle LLC/SNAP, see rfc-1042 */
753 if (pkt_len < 24 || memcmp(&pkt[12], "\xaa\xaa\x03\0\0\0", 6)) {
760 /* FIXME: assemble datagram from multiple sections */
762 stats->rx_frame_errors++;
766 /* we have 14 byte ethernet header (ip header follows);
767 * 12 byte MPE header; 4 byte checksum; + 2 byte alignment, 8 byte LLC/SNAP
769 if (!(skb = dev_alloc_skb(pkt_len - 4 - 12 + 14 + 2 - snap))) {
770 //printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n", dev->name);
774 skb_reserve(skb, 2); /* longword align L3 header */
777 /* copy L3 payload */
778 eth = (u8 *) skb_put(skb, pkt_len - 12 - 4 + 14 - snap);
779 memcpy(eth + 14, pkt + 12 + snap, pkt_len - 12 - 4 - snap);
781 /* create ethernet header: */
789 eth[6]=eth[7]=eth[8]=eth[9]=eth[10]=eth[11]=0;
795 /* protocol numbers are from rfc-1700 or
796 * http://www.iana.org/assignments/ethernet-numbers
798 if (pkt[12] >> 4 == 6) { /* version field from IP header */
799 eth[12] = 0x86; /* IPv6 */
802 eth[12] = 0x08; /* IPv4 */
807 skb->protocol = dvb_net_eth_type_trans(skb, dev);
810 stats->rx_bytes+=skb->len;
814 static int dvb_net_sec_callback(const u8 *buffer1, size_t buffer1_len,
815 const u8 *buffer2, size_t buffer2_len,
816 struct dmx_section_filter *filter,
817 enum dmx_success success)
819 struct net_device *dev = filter->priv;
822 * we rely on the DVB API definition where exactly one complete
823 * section is delivered in buffer1
825 dvb_net_sec (dev, (u8*) buffer1, buffer1_len);
829 static int dvb_net_tx(struct sk_buff *skb, struct net_device *dev)
835 static u8 mask_normal[6]={0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
836 static u8 mask_allmulti[6]={0xff, 0xff, 0xff, 0x00, 0x00, 0x00};
837 static u8 mac_allmulti[6]={0x01, 0x00, 0x5e, 0x00, 0x00, 0x00};
838 static u8 mask_promisc[6]={0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
840 static int dvb_net_filter_sec_set(struct net_device *dev,
841 struct dmx_section_filter **secfilter,
842 u8 *mac, u8 *mac_mask)
844 struct dvb_net_priv *priv = dev->priv;
848 ret = priv->secfeed->allocate_filter(priv->secfeed, secfilter);
850 printk("%s: could not get filter\n", dev->name);
854 (*secfilter)->priv=(void *) dev;
856 memset((*secfilter)->filter_value, 0x00, DMX_MAX_FILTER_SIZE);
857 memset((*secfilter)->filter_mask, 0x00, DMX_MAX_FILTER_SIZE);
858 memset((*secfilter)->filter_mode, 0xff, DMX_MAX_FILTER_SIZE);
860 (*secfilter)->filter_value[0]=0x3e;
861 (*secfilter)->filter_value[3]=mac[5];
862 (*secfilter)->filter_value[4]=mac[4];
863 (*secfilter)->filter_value[8]=mac[3];
864 (*secfilter)->filter_value[9]=mac[2];
865 (*secfilter)->filter_value[10]=mac[1];
866 (*secfilter)->filter_value[11]=mac[0];
868 (*secfilter)->filter_mask[0] = 0xff;
869 (*secfilter)->filter_mask[3] = mac_mask[5];
870 (*secfilter)->filter_mask[4] = mac_mask[4];
871 (*secfilter)->filter_mask[8] = mac_mask[3];
872 (*secfilter)->filter_mask[9] = mac_mask[2];
873 (*secfilter)->filter_mask[10] = mac_mask[1];
874 (*secfilter)->filter_mask[11]=mac_mask[0];
876 dprintk("%s: filter mac=%02x %02x %02x %02x %02x %02x\n",
877 dev->name, mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
878 dprintk("%s: filter mask=%02x %02x %02x %02x %02x %02x\n",
879 dev->name, mac_mask[0], mac_mask[1], mac_mask[2],
880 mac_mask[3], mac_mask[4], mac_mask[5]);
885 static int dvb_net_feed_start(struct net_device *dev)
888 struct dvb_net_priv *priv = dev->priv;
889 struct dmx_demux *demux = priv->demux;
890 unsigned char *mac = (unsigned char *) dev->dev_addr;
892 dprintk("%s: rx_mode %i\n", __FUNCTION__, priv->rx_mode);
894 if (priv->tsfeed || priv->secfeed || priv->secfilter || priv->multi_secfilter[0])
895 printk("%s: BUG %d\n", __FUNCTION__, __LINE__);
898 priv->secfilter=NULL;
901 if (priv->feedtype == DVB_NET_FEEDTYPE_MPE) {
902 dprintk("%s: alloc secfeed\n", __FUNCTION__);
903 ret=demux->allocate_section_feed(demux, &priv->secfeed,
904 dvb_net_sec_callback);
906 printk("%s: could not allocate section feed\n", dev->name);
910 ret = priv->secfeed->set(priv->secfeed, priv->pid, 32768, 1);
913 printk("%s: could not set section feed\n", dev->name);
914 priv->demux->release_section_feed(priv->demux, priv->secfeed);
919 if (priv->rx_mode != RX_MODE_PROMISC) {
920 dprintk("%s: set secfilter\n", __FUNCTION__);
921 dvb_net_filter_sec_set(dev, &priv->secfilter, mac, mask_normal);
924 switch (priv->rx_mode) {
926 for (i = 0; i < priv->multi_num; i++) {
927 dprintk("%s: set multi_secfilter[%d]\n", __FUNCTION__, i);
928 dvb_net_filter_sec_set(dev, &priv->multi_secfilter[i],
929 priv->multi_macs[i], mask_normal);
932 case RX_MODE_ALL_MULTI:
934 dprintk("%s: set multi_secfilter[0]\n", __FUNCTION__);
935 dvb_net_filter_sec_set(dev, &priv->multi_secfilter[0],
936 mac_allmulti, mask_allmulti);
938 case RX_MODE_PROMISC:
940 dprintk("%s: set secfilter\n", __FUNCTION__);
941 dvb_net_filter_sec_set(dev, &priv->secfilter, mac, mask_promisc);
945 dprintk("%s: start filtering\n", __FUNCTION__);
946 priv->secfeed->start_filtering(priv->secfeed);
947 } else if (priv->feedtype == DVB_NET_FEEDTYPE_ULE) {
948 struct timespec timeout = { 0, 30000000 }; // 30 msec
950 /* we have payloads encapsulated in TS */
951 dprintk("%s: alloc tsfeed\n", __FUNCTION__);
952 ret = demux->allocate_ts_feed(demux, &priv->tsfeed, dvb_net_ts_callback);
954 printk("%s: could not allocate ts feed\n", dev->name);
958 /* Set netdevice pointer for ts decaps callback. */
959 priv->tsfeed->priv = (void *)dev;
960 ret = priv->tsfeed->set(priv->tsfeed, priv->pid,
961 TS_PACKET, DMX_TS_PES_OTHER,
962 32768, /* circular buffer size */
966 printk("%s: could not set ts feed\n", dev->name);
967 priv->demux->release_ts_feed(priv->demux, priv->tsfeed);
972 dprintk("%s: start filtering\n", __FUNCTION__);
973 priv->tsfeed->start_filtering(priv->tsfeed);
982 static int dvb_net_feed_stop(struct net_device *dev)
984 struct dvb_net_priv *priv = dev->priv;
987 dprintk("%s\n", __FUNCTION__);
989 if (priv->feedtype == DVB_NET_FEEDTYPE_MPE) {
991 if (priv->secfeed->is_filtering) {
992 dprintk("%s: stop secfeed\n", __FUNCTION__);
993 priv->secfeed->stop_filtering(priv->secfeed);
996 if (priv->secfilter) {
997 dprintk("%s: release secfilter\n", __FUNCTION__);
998 priv->secfeed->release_filter(priv->secfeed,
1000 priv->secfilter=NULL;
1003 for (i=0; i<priv->multi_num; i++) {
1004 if (priv->multi_secfilter[i]) {
1005 dprintk("%s: release multi_filter[%d]\n",
1007 priv->secfeed->release_filter(priv->secfeed,
1008 priv->multi_secfilter[i]);
1009 priv->multi_secfilter[i] = NULL;
1013 priv->demux->release_section_feed(priv->demux, priv->secfeed);
1014 priv->secfeed = NULL;
1016 printk("%s: no feed to stop\n", dev->name);
1017 } else if (priv->feedtype == DVB_NET_FEEDTYPE_ULE) {
1019 if (priv->tsfeed->is_filtering) {
1020 dprintk("%s: stop tsfeed\n", __FUNCTION__);
1021 priv->tsfeed->stop_filtering(priv->tsfeed);
1023 priv->demux->release_ts_feed(priv->demux, priv->tsfeed);
1024 priv->tsfeed = NULL;
1027 printk("%s: no ts feed to stop\n", dev->name);
1035 static int dvb_set_mc_filter (struct net_device *dev, struct dev_mc_list *mc)
1037 struct dvb_net_priv *priv = dev->priv;
1039 if (priv->multi_num == DVB_NET_MULTICAST_MAX)
1042 memcpy(priv->multi_macs[priv->multi_num], mc->dmi_addr, 6);
1049 static void wq_set_multicast_list (void *data)
1051 struct net_device *dev = data;
1052 struct dvb_net_priv *priv = dev->priv;
1054 dvb_net_feed_stop(dev);
1055 priv->rx_mode = RX_MODE_UNI;
1056 spin_lock_bh(&dev->xmit_lock);
1058 if (dev->flags & IFF_PROMISC) {
1059 dprintk("%s: promiscuous mode\n", dev->name);
1060 priv->rx_mode = RX_MODE_PROMISC;
1061 } else if ((dev->flags & IFF_ALLMULTI)) {
1062 dprintk("%s: allmulti mode\n", dev->name);
1063 priv->rx_mode = RX_MODE_ALL_MULTI;
1064 } else if (dev->mc_count) {
1066 struct dev_mc_list *mc;
1068 dprintk("%s: set_mc_list, %d entries\n",
1069 dev->name, dev->mc_count);
1071 priv->rx_mode = RX_MODE_MULTI;
1072 priv->multi_num = 0;
1074 for (mci = 0, mc=dev->mc_list;
1075 mci < dev->mc_count;
1076 mc = mc->next, mci++) {
1077 dvb_set_mc_filter(dev, mc);
1081 spin_unlock_bh(&dev->xmit_lock);
1082 dvb_net_feed_start(dev);
1086 static void dvb_net_set_multicast_list (struct net_device *dev)
1088 struct dvb_net_priv *priv = dev->priv;
1089 schedule_work(&priv->set_multicast_list_wq);
1093 static void wq_restart_net_feed (void *data)
1095 struct net_device *dev = data;
1097 if (netif_running(dev)) {
1098 dvb_net_feed_stop(dev);
1099 dvb_net_feed_start(dev);
1104 static int dvb_net_set_mac (struct net_device *dev, void *p)
1106 struct dvb_net_priv *priv = dev->priv;
1107 struct sockaddr *addr=p;
1109 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1111 if (netif_running(dev))
1112 schedule_work(&priv->restart_net_feed_wq);
1118 static int dvb_net_open(struct net_device *dev)
1120 struct dvb_net_priv *priv = dev->priv;
1123 dvb_net_feed_start(dev);
1128 static int dvb_net_stop(struct net_device *dev)
1130 struct dvb_net_priv *priv = dev->priv;
1133 return dvb_net_feed_stop(dev);
1136 static struct net_device_stats * dvb_net_get_stats(struct net_device *dev)
1138 return &((struct dvb_net_priv*) dev->priv)->stats;
1141 static void dvb_net_setup(struct net_device *dev)
1145 dev->open = dvb_net_open;
1146 dev->stop = dvb_net_stop;
1147 dev->hard_start_xmit = dvb_net_tx;
1148 dev->get_stats = dvb_net_get_stats;
1149 dev->set_multicast_list = dvb_net_set_multicast_list;
1150 dev->set_mac_address = dvb_net_set_mac;
1153 dev->hard_header_cache = NULL;
1154 dev->flags |= IFF_NOARP;
1157 static int get_if(struct dvb_net *dvbnet)
1161 for (i=0; i<DVB_NET_DEVICES_MAX; i++)
1162 if (!dvbnet->state[i])
1165 if (i == DVB_NET_DEVICES_MAX)
1172 static int dvb_net_add_if(struct dvb_net *dvbnet, u16 pid, u8 feedtype)
1174 struct net_device *net;
1175 struct dvb_net_priv *priv;
1179 if (feedtype != DVB_NET_FEEDTYPE_MPE && feedtype != DVB_NET_FEEDTYPE_ULE)
1181 if ((if_num = get_if(dvbnet)) < 0)
1184 net = alloc_netdev(sizeof(struct dvb_net_priv), "dvb", dvb_net_setup);
1188 if (dvbnet->dvbdev->id)
1189 snprintf(net->name, IFNAMSIZ, "dvb%d%u%d",
1190 dvbnet->dvbdev->adapter->num, dvbnet->dvbdev->id, if_num);
1192 /* compatibility fix to keep dvb0_0 format */
1193 snprintf(net->name, IFNAMSIZ, "dvb%d_%d",
1194 dvbnet->dvbdev->adapter->num, if_num);
1197 memcpy(net->dev_addr, dvbnet->dvbdev->adapter->proposed_mac, 6);
1199 dvbnet->device[if_num] = net;
1202 priv->demux = dvbnet->demux;
1204 priv->rx_mode = RX_MODE_UNI;
1205 priv->need_pusi = 1;
1207 priv->feedtype = feedtype;
1210 INIT_WORK(&priv->set_multicast_list_wq, wq_set_multicast_list, net);
1211 INIT_WORK(&priv->restart_net_feed_wq, wq_restart_net_feed, net);
1212 init_MUTEX(&priv->mutex);
1214 net->base_addr = pid;
1216 if ((result = register_netdev(net)) < 0) {
1217 dvbnet->device[if_num] = NULL;
1221 printk("dvb_net: created network interface %s\n", net->name);
1226 static int dvb_net_remove_if(struct dvb_net *dvbnet, unsigned long num)
1228 struct net_device *net = dvbnet->device[num];
1229 struct dvb_net_priv *priv;
1231 if (!dvbnet->state[num])
1238 flush_scheduled_work();
1239 printk("dvb_net: removed network interface %s\n", net->name);
1240 unregister_netdev(net);
1241 dvbnet->state[num]=0;
1242 dvbnet->device[num] = NULL;
1248 static int dvb_net_do_ioctl(struct inode *inode, struct file *file,
1249 unsigned int cmd, void *parg)
1251 struct dvb_device *dvbdev = file->private_data;
1252 struct dvb_net *dvbnet = dvbdev->priv;
1254 if (((file->f_flags&O_ACCMODE)==O_RDONLY))
1260 struct dvb_net_if *dvbnetif = parg;
1263 if (!capable(CAP_SYS_ADMIN))
1266 if (!try_module_get(dvbdev->adapter->module))
1269 result=dvb_net_add_if(dvbnet, dvbnetif->pid, dvbnetif->feedtype);
1271 module_put(dvbdev->adapter->module);
1274 dvbnetif->if_num=result;
1279 struct net_device *netdev;
1280 struct dvb_net_priv *priv_data;
1281 struct dvb_net_if *dvbnetif = parg;
1283 if (dvbnetif->if_num >= DVB_NET_DEVICES_MAX ||
1284 !dvbnet->state[dvbnetif->if_num])
1287 netdev = dvbnet->device[dvbnetif->if_num];
1289 priv_data = netdev->priv;
1290 dvbnetif->pid=priv_data->pid;
1291 dvbnetif->feedtype=priv_data->feedtype;
1298 if (!capable(CAP_SYS_ADMIN))
1300 if ((unsigned long) parg >= DVB_NET_DEVICES_MAX)
1302 ret = dvb_net_remove_if(dvbnet, (unsigned long) parg);
1304 module_put(dvbdev->adapter->module);
1308 /* binary compatiblity cruft */
1309 case __NET_ADD_IF_OLD:
1311 struct __dvb_net_if_old *dvbnetif = parg;
1314 if (!capable(CAP_SYS_ADMIN))
1317 if (!try_module_get(dvbdev->adapter->module))
1320 result=dvb_net_add_if(dvbnet, dvbnetif->pid, DVB_NET_FEEDTYPE_MPE);
1322 module_put(dvbdev->adapter->module);
1325 dvbnetif->if_num=result;
1328 case __NET_GET_IF_OLD:
1330 struct net_device *netdev;
1331 struct dvb_net_priv *priv_data;
1332 struct __dvb_net_if_old *dvbnetif = parg;
1334 if (dvbnetif->if_num >= DVB_NET_DEVICES_MAX ||
1335 !dvbnet->state[dvbnetif->if_num])
1338 netdev = dvbnet->device[dvbnetif->if_num];
1340 priv_data = netdev->priv;
1341 dvbnetif->pid=priv_data->pid;
1350 static int dvb_net_ioctl(struct inode *inode, struct file *file,
1351 unsigned int cmd, unsigned long arg)
1353 return dvb_usercopy(inode, file, cmd, arg, dvb_net_do_ioctl);
1356 static struct file_operations dvb_net_fops = {
1357 .owner = THIS_MODULE,
1358 .ioctl = dvb_net_ioctl,
1359 .open = dvb_generic_open,
1360 .release = dvb_generic_release,
1363 static struct dvb_device dvbdev_net = {
1367 .fops = &dvb_net_fops,
1371 void dvb_net_release (struct dvb_net *dvbnet)
1375 dvb_unregister_device(dvbnet->dvbdev);
1377 for (i=0; i<DVB_NET_DEVICES_MAX; i++) {
1378 if (!dvbnet->state[i])
1380 dvb_net_remove_if(dvbnet, i);
1383 EXPORT_SYMBOL(dvb_net_release);
1386 int dvb_net_init (struct dvb_adapter *adap, struct dvb_net *dvbnet,
1387 struct dmx_demux *dmx)
1391 dvbnet->demux = dmx;
1393 for (i=0; i<DVB_NET_DEVICES_MAX; i++)
1394 dvbnet->state[i] = 0;
1396 dvb_register_device (adap, &dvbnet->dvbdev, &dvbdev_net,
1397 dvbnet, DVB_DEVICE_NET);
1401 EXPORT_SYMBOL(dvb_net_init);