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1da177e4 LT |
1 | /* |
2 | * dvb_net.c | |
3 | * | |
4 | * Copyright (C) 2001 Convergence integrated media GmbH | |
5 | * Ralph Metzler <ralph@convergence.de> | |
6 | * Copyright (C) 2002 Ralph Metzler <rjkm@metzlerbros.de> | |
7 | * | |
8 | * ULE Decapsulation code: | |
9 | * Copyright (C) 2003, 2004 gcs - Global Communication & Services GmbH. | |
10 | * and Department of Scientific Computing | |
11 | * Paris Lodron University of Salzburg. | |
12 | * Hilmar Linder <hlinder@cosy.sbg.ac.at> | |
13 | * and Wolfram Stering <wstering@cosy.sbg.ac.at> | |
14 | * | |
15 | * ULE Decaps according to draft-ietf-ipdvb-ule-03.txt. | |
16 | * | |
17 | * This program is free software; you can redistribute it and/or | |
18 | * modify it under the terms of the GNU General Public License | |
19 | * as published by the Free Software Foundation; either version 2 | |
20 | * of the License, or (at your option) any later version. | |
21 | * | |
22 | * This program is distributed in the hope that it will be useful, | |
23 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
24 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
25 | * GNU General Public License for more details. | |
26 | * | |
27 | * You should have received a copy of the GNU General Public License | |
28 | * along with this program; if not, write to the Free Software | |
29 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
30 | * Or, point your browser to http://www.gnu.org/copyleft/gpl.html | |
31 | */ | |
32 | ||
33 | /* | |
34 | * ULE ChangeLog: | |
35 | * Feb 2004: hl/ws v1: Implementing draft-fair-ipdvb-ule-01.txt | |
36 | * | |
37 | * Dec 2004: hl/ws v2: Implementing draft-ietf-ipdvb-ule-03.txt: | |
38 | * ULE Extension header handling. | |
39 | * Bugreports by Moritz Vieth and Hanno Tersteegen, | |
40 | * Fraunhofer Institute for Open Communication Systems | |
41 | * Competence Center for Advanced Satellite Communications. | |
42 | * Bugfixes and robustness improvements. | |
43 | * Filtering on dest MAC addresses, if present (D-Bit = 0) | |
44 | * ULE_DEBUG compile-time option. | |
45 | */ | |
46 | ||
47 | /* | |
48 | * FIXME / TODO (dvb_net.c): | |
49 | * | |
50 | * Unloading does not work for 2.6.9 kernels: a refcount doesn't go to zero. | |
51 | * | |
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()). | |
54 | * | |
55 | */ | |
56 | ||
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> | |
65 | #include <linux/version.h> | |
66 | ||
67 | #include "dvb_demux.h" | |
68 | #include "dvb_net.h" | |
69 | ||
70 | static int dvb_net_debug; | |
71 | module_param(dvb_net_debug, int, 0444); | |
72 | MODULE_PARM_DESC(dvb_net_debug, "enable debug messages"); | |
73 | ||
74 | #define dprintk(x...) do { if (dvb_net_debug) printk(x); } while (0) | |
75 | ||
76 | ||
77 | static inline __u32 iov_crc32( __u32 c, struct kvec *iov, unsigned int cnt ) | |
78 | { | |
79 | unsigned int j; | |
80 | for (j = 0; j < cnt; j++) | |
81 | c = crc32_be( c, iov[j].iov_base, iov[j].iov_len ); | |
82 | return c; | |
83 | } | |
84 | ||
85 | ||
86 | #define DVB_NET_MULTICAST_MAX 10 | |
87 | ||
88 | #undef ULE_DEBUG | |
89 | ||
90 | #ifdef ULE_DEBUG | |
91 | ||
92 | #define isprint(c) ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || (c >= '0' && c <= '9')) | |
93 | ||
94 | static void hexdump( const unsigned char *buf, unsigned short len ) | |
95 | { | |
96 | char str[80], octet[10]; | |
97 | int ofs, i, l; | |
98 | ||
99 | for (ofs = 0; ofs < len; ofs += 16) { | |
100 | sprintf( str, "%03d: ", ofs ); | |
101 | ||
102 | for (i = 0; i < 16; i++) { | |
103 | if ((i + ofs) < len) | |
104 | sprintf( octet, "%02x ", buf[ofs + i] ); | |
105 | else | |
106 | strcpy( octet, " " ); | |
107 | ||
108 | strcat( str, octet ); | |
109 | } | |
110 | strcat( str, " " ); | |
111 | l = strlen( str ); | |
112 | ||
113 | for (i = 0; (i < 16) && ((i + ofs) < len); i++) | |
114 | str[l++] = isprint( buf[ofs + i] ) ? buf[ofs + i] : '.'; | |
115 | ||
116 | str[l] = '\0'; | |
117 | printk( KERN_WARNING "%s\n", str ); | |
118 | } | |
119 | } | |
120 | ||
121 | #endif | |
122 | ||
123 | struct dvb_net_priv { | |
124 | int in_use; | |
125 | struct net_device_stats stats; | |
126 | u16 pid; | |
127 | struct dvb_net *host; | |
128 | struct dmx_demux *demux; | |
129 | struct dmx_section_feed *secfeed; | |
130 | struct dmx_section_filter *secfilter; | |
131 | struct dmx_ts_feed *tsfeed; | |
132 | int multi_num; | |
133 | struct dmx_section_filter *multi_secfilter[DVB_NET_MULTICAST_MAX]; | |
134 | unsigned char multi_macs[DVB_NET_MULTICAST_MAX][6]; | |
135 | int rx_mode; | |
136 | #define RX_MODE_UNI 0 | |
137 | #define RX_MODE_MULTI 1 | |
138 | #define RX_MODE_ALL_MULTI 2 | |
139 | #define RX_MODE_PROMISC 3 | |
140 | struct work_struct set_multicast_list_wq; | |
141 | struct work_struct restart_net_feed_wq; | |
142 | unsigned char feedtype; /* Either FEED_TYPE_ or FEED_TYPE_ULE */ | |
143 | int need_pusi; /* Set to 1, if synchronization on PUSI required. */ | |
144 | unsigned char tscc; /* TS continuity counter after sync on PUSI. */ | |
145 | struct sk_buff *ule_skb; /* ULE SNDU decodes into this buffer. */ | |
146 | unsigned char *ule_next_hdr; /* Pointer into skb to next ULE extension header. */ | |
147 | unsigned short ule_sndu_len; /* ULE SNDU length in bytes, w/o D-Bit. */ | |
148 | unsigned short ule_sndu_type; /* ULE SNDU type field, complete. */ | |
149 | unsigned char ule_sndu_type_1; /* ULE SNDU type field, if split across 2 TS cells. */ | |
150 | unsigned char ule_dbit; /* Whether the DestMAC address present | |
151 | * or not (bit is set). */ | |
152 | unsigned char ule_bridged; /* Whether the ULE_BRIDGED extension header was found. */ | |
153 | int ule_sndu_remain; /* Nr. of bytes still required for current ULE SNDU. */ | |
154 | unsigned long ts_count; /* Current ts cell counter. */ | |
155 | }; | |
156 | ||
157 | ||
158 | /** | |
159 | * Determine the packet's protocol ID. The rule here is that we | |
160 | * assume 802.3 if the type field is short enough to be a length. | |
161 | * This is normal practice and works for any 'now in use' protocol. | |
162 | * | |
163 | * stolen from eth.c out of the linux kernel, hacked for dvb-device | |
164 | * by Michael Holzt <kju@debian.org> | |
165 | */ | |
166 | static unsigned short dvb_net_eth_type_trans(struct sk_buff *skb, | |
167 | struct net_device *dev) | |
168 | { | |
169 | struct ethhdr *eth; | |
170 | unsigned char *rawp; | |
171 | ||
172 | skb->mac.raw=skb->data; | |
173 | skb_pull(skb,dev->hard_header_len); | |
174 | #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,8) | |
175 | eth = skb->mac.ethernet; | |
176 | #else | |
177 | eth = eth_hdr(skb); | |
178 | #endif | |
179 | ||
180 | if (*eth->h_dest & 1) { | |
181 | if(memcmp(eth->h_dest,dev->broadcast, ETH_ALEN)==0) | |
182 | skb->pkt_type=PACKET_BROADCAST; | |
183 | else | |
184 | skb->pkt_type=PACKET_MULTICAST; | |
185 | } | |
186 | ||
187 | if (ntohs(eth->h_proto) >= 1536) | |
188 | return eth->h_proto; | |
189 | ||
190 | rawp = skb->data; | |
191 | ||
192 | /** | |
193 | * This is a magic hack to spot IPX packets. Older Novell breaks | |
194 | * the protocol design and runs IPX over 802.3 without an 802.2 LLC | |
195 | * layer. We look for FFFF which isn't a used 802.2 SSAP/DSAP. This | |
196 | * won't work for fault tolerant netware but does for the rest. | |
197 | */ | |
198 | if (*(unsigned short *)rawp == 0xFFFF) | |
199 | return htons(ETH_P_802_3); | |
200 | ||
201 | /** | |
202 | * Real 802.2 LLC | |
203 | */ | |
204 | return htons(ETH_P_802_2); | |
205 | } | |
206 | ||
207 | #define TS_SZ 188 | |
208 | #define TS_SYNC 0x47 | |
209 | #define TS_TEI 0x80 | |
210 | #define TS_SC 0xC0 | |
211 | #define TS_PUSI 0x40 | |
212 | #define TS_AF_A 0x20 | |
213 | #define TS_AF_D 0x10 | |
214 | ||
215 | /* ULE Extension Header handlers. */ | |
216 | ||
217 | #define ULE_TEST 0 | |
218 | #define ULE_BRIDGED 1 | |
219 | ||
220 | static int ule_test_sndu( struct dvb_net_priv *p ) | |
221 | { | |
222 | return -1; | |
223 | } | |
224 | ||
225 | static int ule_bridged_sndu( struct dvb_net_priv *p ) | |
226 | { | |
227 | /* BRIDGE SNDU handling sucks in draft-ietf-ipdvb-ule-03.txt. | |
228 | * This has to be the last extension header, otherwise it won't work. | |
229 | * Blame the authors! | |
230 | */ | |
231 | p->ule_bridged = 1; | |
232 | return 0; | |
233 | } | |
234 | ||
235 | ||
236 | /** Handle ULE extension headers. | |
237 | * Function is called after a successful CRC32 verification of an ULE SNDU to complete its decoding. | |
238 | * Returns: >= 0: nr. of bytes consumed by next extension header | |
239 | * -1: Mandatory extension header that is not recognized or TEST SNDU; discard. | |
240 | */ | |
241 | static int handle_one_ule_extension( struct dvb_net_priv *p ) | |
242 | { | |
243 | /* Table of mandatory extension header handlers. The header type is the index. */ | |
244 | static int (*ule_mandatory_ext_handlers[255])( struct dvb_net_priv *p ) = | |
245 | { [0] = ule_test_sndu, [1] = ule_bridged_sndu, [2] = NULL, }; | |
246 | ||
247 | /* Table of optional extension header handlers. The header type is the index. */ | |
248 | static int (*ule_optional_ext_handlers[255])( struct dvb_net_priv *p ) = { NULL, }; | |
249 | ||
250 | int ext_len = 0; | |
251 | unsigned char hlen = (p->ule_sndu_type & 0x0700) >> 8; | |
252 | unsigned char htype = p->ule_sndu_type & 0x00FF; | |
253 | ||
254 | /* Discriminate mandatory and optional extension headers. */ | |
255 | if (hlen == 0) { | |
256 | /* Mandatory extension header */ | |
257 | if (ule_mandatory_ext_handlers[htype]) { | |
258 | ext_len = ule_mandatory_ext_handlers[htype]( p ); | |
259 | p->ule_next_hdr += ext_len; | |
260 | if (! p->ule_bridged) { | |
261 | p->ule_sndu_type = ntohs( *(unsigned short *)p->ule_next_hdr ); | |
262 | p->ule_next_hdr += 2; | |
263 | } else { | |
264 | p->ule_sndu_type = ntohs( *(unsigned short *)(p->ule_next_hdr + ((p->ule_dbit ? 2 : 3) * ETH_ALEN)) ); | |
265 | /* This assures the extension handling loop will terminate. */ | |
266 | } | |
267 | } else | |
268 | ext_len = -1; /* SNDU has to be discarded. */ | |
269 | } else { | |
270 | /* Optional extension header. Calculate the length. */ | |
271 | ext_len = hlen << 2; | |
272 | /* Process the optional extension header according to its type. */ | |
273 | if (ule_optional_ext_handlers[htype]) | |
274 | (void)ule_optional_ext_handlers[htype]( p ); | |
275 | p->ule_next_hdr += ext_len; | |
276 | p->ule_sndu_type = ntohs( *(unsigned short *)p->ule_next_hdr ); | |
277 | p->ule_next_hdr += 2; | |
278 | } | |
279 | ||
280 | return ext_len; | |
281 | } | |
282 | ||
283 | static int handle_ule_extensions( struct dvb_net_priv *p ) | |
284 | { | |
285 | int total_ext_len = 0, l; | |
286 | ||
287 | p->ule_next_hdr = p->ule_skb->data; | |
288 | do { | |
289 | l = handle_one_ule_extension( p ); | |
290 | if (l == -1) return -1; /* Stop extension header processing and discard SNDU. */ | |
291 | total_ext_len += l; | |
292 | ||
293 | } while (p->ule_sndu_type < 1536); | |
294 | ||
295 | return total_ext_len; | |
296 | } | |
297 | ||
298 | ||
299 | /** Prepare for a new ULE SNDU: reset the decoder state. */ | |
300 | static inline void reset_ule( struct dvb_net_priv *p ) | |
301 | { | |
302 | p->ule_skb = NULL; | |
303 | p->ule_next_hdr = NULL; | |
304 | p->ule_sndu_len = 0; | |
305 | p->ule_sndu_type = 0; | |
306 | p->ule_sndu_type_1 = 0; | |
307 | p->ule_sndu_remain = 0; | |
308 | p->ule_dbit = 0xFF; | |
309 | p->ule_bridged = 0; | |
310 | } | |
311 | ||
312 | /** | |
313 | * Decode ULE SNDUs according to draft-ietf-ipdvb-ule-03.txt from a sequence of | |
314 | * TS cells of a single PID. | |
315 | */ | |
316 | static void dvb_net_ule( struct net_device *dev, const u8 *buf, size_t buf_len ) | |
317 | { | |
318 | struct dvb_net_priv *priv = (struct dvb_net_priv *)dev->priv; | |
319 | unsigned long skipped = 0L; | |
320 | u8 *ts, *ts_end, *from_where = NULL, ts_remain = 0, how_much = 0, new_ts = 1; | |
321 | struct ethhdr *ethh = NULL; | |
322 | ||
323 | #ifdef ULE_DEBUG | |
324 | /* The code inside ULE_DEBUG keeps a history of the last 100 TS cells processed. */ | |
325 | static unsigned char ule_hist[100*TS_SZ]; | |
326 | static unsigned char *ule_where = ule_hist, ule_dump = 0; | |
327 | #endif | |
328 | ||
329 | if (dev == NULL) { | |
330 | printk( KERN_ERR "NO netdev struct!\n" ); | |
331 | return; | |
332 | } | |
333 | ||
334 | /* For all TS cells in current buffer. | |
335 | * Appearently, we are called for every single TS cell. | |
336 | */ | |
337 | for (ts = (char *)buf, ts_end = (char *)buf + buf_len; ts < ts_end; /* no default incr. */ ) { | |
338 | ||
339 | if (new_ts) { | |
340 | /* We are about to process a new TS cell. */ | |
341 | ||
342 | #ifdef ULE_DEBUG | |
343 | if (ule_where >= &ule_hist[100*TS_SZ]) ule_where = ule_hist; | |
344 | memcpy( ule_where, ts, TS_SZ ); | |
345 | if (ule_dump) { | |
346 | hexdump( ule_where, TS_SZ ); | |
347 | ule_dump = 0; | |
348 | } | |
349 | ule_where += TS_SZ; | |
350 | #endif | |
351 | ||
352 | /* Check TS error conditions: sync_byte, transport_error_indicator, scrambling_control . */ | |
353 | if ((ts[0] != TS_SYNC) || (ts[1] & TS_TEI) || ((ts[3] & TS_SC) != 0)) { | |
354 | printk(KERN_WARNING "%lu: Invalid TS cell: SYNC %#x, TEI %u, SC %#x.\n", | |
355 | priv->ts_count, ts[0], ts[1] & TS_TEI >> 7, ts[3] & 0xC0 >> 6); | |
356 | ||
357 | /* Drop partly decoded SNDU, reset state, resync on PUSI. */ | |
358 | if (priv->ule_skb) { | |
359 | dev_kfree_skb( priv->ule_skb ); | |
360 | /* Prepare for next SNDU. */ | |
361 | ((struct dvb_net_priv *) dev->priv)->stats.rx_errors++; | |
362 | ((struct dvb_net_priv *) dev->priv)->stats.rx_frame_errors++; | |
363 | } | |
364 | reset_ule(priv); | |
365 | priv->need_pusi = 1; | |
366 | ||
367 | /* Continue with next TS cell. */ | |
368 | ts += TS_SZ; | |
369 | priv->ts_count++; | |
370 | continue; | |
371 | } | |
372 | ||
373 | ts_remain = 184; | |
374 | from_where = ts + 4; | |
375 | } | |
376 | /* Synchronize on PUSI, if required. */ | |
377 | if (priv->need_pusi) { | |
378 | if (ts[1] & TS_PUSI) { | |
379 | /* Find beginning of first ULE SNDU in current TS cell. */ | |
380 | /* Synchronize continuity counter. */ | |
381 | priv->tscc = ts[3] & 0x0F; | |
382 | /* There is a pointer field here. */ | |
383 | if (ts[4] > ts_remain) { | |
384 | printk(KERN_ERR "%lu: Invalid ULE packet " | |
385 | "(pointer field %d)\n", priv->ts_count, ts[4]); | |
386 | ts += TS_SZ; | |
387 | priv->ts_count++; | |
388 | continue; | |
389 | } | |
390 | /* Skip to destination of pointer field. */ | |
391 | from_where = &ts[5] + ts[4]; | |
392 | ts_remain -= 1 + ts[4]; | |
393 | skipped = 0; | |
394 | } else { | |
395 | skipped++; | |
396 | ts += TS_SZ; | |
397 | priv->ts_count++; | |
398 | continue; | |
399 | } | |
400 | } | |
401 | ||
402 | /* Check continuity counter. */ | |
403 | if (new_ts) { | |
404 | if ((ts[3] & 0x0F) == priv->tscc) | |
405 | priv->tscc = (priv->tscc + 1) & 0x0F; | |
406 | else { | |
407 | /* TS discontinuity handling: */ | |
408 | printk(KERN_WARNING "%lu: TS discontinuity: got %#x, " | |
409 | "exptected %#x.\n", priv->ts_count, ts[3] & 0x0F, priv->tscc); | |
410 | /* Drop partly decoded SNDU, reset state, resync on PUSI. */ | |
411 | if (priv->ule_skb) { | |
412 | dev_kfree_skb( priv->ule_skb ); | |
413 | /* Prepare for next SNDU. */ | |
414 | // reset_ule(priv); moved to below. | |
415 | ((struct dvb_net_priv *) dev->priv)->stats.rx_errors++; | |
416 | ((struct dvb_net_priv *) dev->priv)->stats.rx_frame_errors++; | |
417 | } | |
418 | reset_ule(priv); | |
419 | /* skip to next PUSI. */ | |
420 | priv->need_pusi = 1; | |
421 | ts += TS_SZ; | |
422 | priv->ts_count++; | |
423 | continue; | |
424 | } | |
425 | /* If we still have an incomplete payload, but PUSI is | |
426 | * set; some TS cells are missing. | |
427 | * This is only possible here, if we missed exactly 16 TS | |
428 | * cells (continuity counter wrap). */ | |
429 | if (ts[1] & TS_PUSI) { | |
430 | if (! priv->need_pusi) { | |
431 | if (*from_where > 181) { | |
432 | /* Pointer field is invalid. Drop this TS cell and any started ULE SNDU. */ | |
433 | printk(KERN_WARNING "%lu: Invalid pointer " | |
434 | "field: %u.\n", priv->ts_count, *from_where); | |
435 | ||
436 | /* Drop partly decoded SNDU, reset state, resync on PUSI. */ | |
437 | if (priv->ule_skb) { | |
438 | dev_kfree_skb( priv->ule_skb ); | |
439 | ((struct dvb_net_priv *) dev->priv)->stats.rx_errors++; | |
440 | ((struct dvb_net_priv *) dev->priv)->stats.rx_frame_errors++; | |
441 | } | |
442 | reset_ule(priv); | |
443 | priv->need_pusi = 1; | |
444 | ts += TS_SZ; | |
445 | priv->ts_count++; | |
446 | continue; | |
447 | } | |
448 | /* Skip pointer field (we're processing a | |
449 | * packed payload). */ | |
450 | from_where += 1; | |
451 | ts_remain -= 1; | |
452 | } else | |
453 | priv->need_pusi = 0; | |
454 | ||
455 | if (priv->ule_sndu_remain > 183) { | |
456 | /* Current SNDU lacks more data than there could be available in the | |
457 | * current TS cell. */ | |
458 | ((struct dvb_net_priv *) dev->priv)->stats.rx_errors++; | |
459 | ((struct dvb_net_priv *) dev->priv)->stats.rx_length_errors++; | |
460 | printk(KERN_WARNING "%lu: Expected %d more SNDU bytes, but " | |
461 | "got PUSI (pf %d, ts_remain %d). Flushing incomplete payload.\n", | |
462 | priv->ts_count, priv->ule_sndu_remain, ts[4], ts_remain); | |
463 | dev_kfree_skb(priv->ule_skb); | |
464 | /* Prepare for next SNDU. */ | |
465 | reset_ule(priv); | |
466 | /* Resync: go to where pointer field points to: start of next ULE SNDU. */ | |
467 | from_where += ts[4]; | |
468 | ts_remain -= ts[4]; | |
469 | } | |
470 | } | |
471 | } | |
472 | ||
473 | /* Check if new payload needs to be started. */ | |
474 | if (priv->ule_skb == NULL) { | |
475 | /* Start a new payload with skb. | |
476 | * Find ULE header. It is only guaranteed that the | |
477 | * length field (2 bytes) is contained in the current | |
478 | * TS. | |
479 | * Check ts_remain has to be >= 2 here. */ | |
480 | if (ts_remain < 2) { | |
481 | printk(KERN_WARNING "Invalid payload packing: only %d " | |
482 | "bytes left in TS. Resyncing.\n", ts_remain); | |
483 | priv->ule_sndu_len = 0; | |
484 | priv->need_pusi = 1; | |
485 | continue; | |
486 | } | |
487 | ||
488 | if (! priv->ule_sndu_len) { | |
489 | /* Got at least two bytes, thus extrace the SNDU length. */ | |
490 | priv->ule_sndu_len = from_where[0] << 8 | from_where[1]; | |
491 | if (priv->ule_sndu_len & 0x8000) { | |
492 | /* D-Bit is set: no dest mac present. */ | |
493 | priv->ule_sndu_len &= 0x7FFF; | |
494 | priv->ule_dbit = 1; | |
495 | } else | |
496 | priv->ule_dbit = 0; | |
497 | ||
498 | if (priv->ule_sndu_len > 32763) { | |
499 | printk(KERN_WARNING "%lu: Invalid ULE SNDU length %u. " | |
500 | "Resyncing.\n", priv->ts_count, priv->ule_sndu_len); | |
501 | priv->ule_sndu_len = 0; | |
502 | priv->need_pusi = 1; | |
503 | new_ts = 1; | |
504 | ts += TS_SZ; | |
505 | priv->ts_count++; | |
506 | continue; | |
507 | } | |
508 | ts_remain -= 2; /* consume the 2 bytes SNDU length. */ | |
509 | from_where += 2; | |
510 | } | |
511 | ||
512 | /* | |
513 | * State of current TS: | |
514 | * ts_remain (remaining bytes in the current TS cell) | |
515 | * 0 ule_type is not available now, we need the next TS cell | |
516 | * 1 the first byte of the ule_type is present | |
517 | * >=2 full ULE header present, maybe some payload data as well. | |
518 | */ | |
519 | switch (ts_remain) { | |
520 | case 1: | |
521 | priv->ule_sndu_type = from_where[0] << 8; | |
522 | priv->ule_sndu_type_1 = 1; /* first byte of ule_type is set. */ | |
523 | ts_remain -= 1; from_where += 1; | |
524 | /* Continue w/ next TS. */ | |
525 | case 0: | |
526 | new_ts = 1; | |
527 | ts += TS_SZ; | |
528 | priv->ts_count++; | |
529 | continue; | |
530 | ||
531 | default: /* complete ULE header is present in current TS. */ | |
532 | /* Extract ULE type field. */ | |
533 | if (priv->ule_sndu_type_1) { | |
534 | priv->ule_sndu_type |= from_where[0]; | |
535 | from_where += 1; /* points to payload start. */ | |
536 | ts_remain -= 1; | |
537 | } else { | |
538 | /* Complete type is present in new TS. */ | |
539 | priv->ule_sndu_type = from_where[0] << 8 | from_where[1]; | |
540 | from_where += 2; /* points to payload start. */ | |
541 | ts_remain -= 2; | |
542 | } | |
543 | break; | |
544 | } | |
545 | ||
546 | /* Allocate the skb (decoder target buffer) with the correct size, as follows: | |
547 | * prepare for the largest case: bridged SNDU with MAC address (dbit = 0). */ | |
548 | priv->ule_skb = dev_alloc_skb( priv->ule_sndu_len + ETH_HLEN + ETH_ALEN ); | |
549 | if (priv->ule_skb == NULL) { | |
550 | printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n", | |
551 | dev->name); | |
552 | ((struct dvb_net_priv *)dev->priv)->stats.rx_dropped++; | |
553 | return; | |
554 | } | |
555 | ||
556 | /* This includes the CRC32 _and_ dest mac, if !dbit. */ | |
557 | priv->ule_sndu_remain = priv->ule_sndu_len; | |
558 | priv->ule_skb->dev = dev; | |
559 | /* Leave space for Ethernet or bridged SNDU header (eth hdr plus one MAC addr). */ | |
560 | skb_reserve( priv->ule_skb, ETH_HLEN + ETH_ALEN ); | |
561 | } | |
562 | ||
563 | /* Copy data into our current skb. */ | |
564 | how_much = min(priv->ule_sndu_remain, (int)ts_remain); | |
565 | memcpy(skb_put(priv->ule_skb, how_much), from_where, how_much); | |
566 | priv->ule_sndu_remain -= how_much; | |
567 | ts_remain -= how_much; | |
568 | from_where += how_much; | |
569 | ||
570 | /* Check for complete payload. */ | |
571 | if (priv->ule_sndu_remain <= 0) { | |
572 | /* Check CRC32, we've got it in our skb already. */ | |
573 | unsigned short ulen = htons(priv->ule_sndu_len); | |
574 | unsigned short utype = htons(priv->ule_sndu_type); | |
575 | struct kvec iov[3] = { | |
576 | { &ulen, sizeof ulen }, | |
577 | { &utype, sizeof utype }, | |
578 | { priv->ule_skb->data, priv->ule_skb->len - 4 } | |
579 | }; | |
580 | unsigned long ule_crc = ~0L, expected_crc; | |
581 | if (priv->ule_dbit) { | |
582 | /* Set D-bit for CRC32 verification, | |
583 | * if it was set originally. */ | |
584 | ulen |= 0x0080; | |
585 | } | |
586 | ||
587 | ule_crc = iov_crc32(ule_crc, iov, 3); | |
588 | expected_crc = *((u8 *)priv->ule_skb->tail - 4) << 24 | | |
589 | *((u8 *)priv->ule_skb->tail - 3) << 16 | | |
590 | *((u8 *)priv->ule_skb->tail - 2) << 8 | | |
591 | *((u8 *)priv->ule_skb->tail - 1); | |
592 | if (ule_crc != expected_crc) { | |
593 | printk(KERN_WARNING "%lu: CRC32 check FAILED: %#lx / %#lx, SNDU len %d type %#x, ts_remain %d, next 2: %x.\n", | |
594 | 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 | ||
596 | #ifdef ULE_DEBUG | |
597 | hexdump( iov[0].iov_base, iov[0].iov_len ); | |
598 | hexdump( iov[1].iov_base, iov[1].iov_len ); | |
599 | hexdump( iov[2].iov_base, iov[2].iov_len ); | |
600 | ||
601 | if (ule_where == ule_hist) { | |
602 | hexdump( &ule_hist[98*TS_SZ], TS_SZ ); | |
603 | hexdump( &ule_hist[99*TS_SZ], TS_SZ ); | |
604 | } else if (ule_where == &ule_hist[TS_SZ]) { | |
605 | hexdump( &ule_hist[99*TS_SZ], TS_SZ ); | |
606 | hexdump( ule_hist, TS_SZ ); | |
607 | } else { | |
608 | hexdump( ule_where - TS_SZ - TS_SZ, TS_SZ ); | |
609 | hexdump( ule_where - TS_SZ, TS_SZ ); | |
610 | } | |
611 | ule_dump = 1; | |
612 | #endif | |
613 | ||
614 | ((struct dvb_net_priv *) dev->priv)->stats.rx_errors++; | |
615 | ((struct dvb_net_priv *) dev->priv)->stats.rx_crc_errors++; | |
616 | dev_kfree_skb(priv->ule_skb); | |
617 | } else { | |
618 | /* CRC32 verified OK. */ | |
619 | /* Handle ULE Extension Headers. */ | |
620 | if (priv->ule_sndu_type < 1536) { | |
621 | /* There is an extension header. Handle it accordingly. */ | |
622 | int l = handle_ule_extensions( priv ); | |
623 | if (l < 0) { | |
624 | /* Mandatory extension header unknown or TEST SNDU. Drop it. */ | |
625 | // printk( KERN_WARNING "Dropping SNDU, extension headers.\n" ); | |
626 | dev_kfree_skb( priv->ule_skb ); | |
627 | goto sndu_done; | |
628 | } | |
629 | skb_pull( priv->ule_skb, l ); | |
630 | } | |
631 | ||
632 | /* CRC32 was OK. Remove it from skb. */ | |
633 | priv->ule_skb->tail -= 4; | |
634 | priv->ule_skb->len -= 4; | |
635 | ||
636 | /* Filter on receiver's destination MAC address, if present. */ | |
637 | if (!priv->ule_dbit) { | |
638 | /* The destination MAC address is the next data in the skb. */ | |
639 | if (memcmp( priv->ule_skb->data, dev->dev_addr, ETH_ALEN )) { | |
640 | /* MAC addresses don't match. Drop SNDU. */ | |
641 | // printk( KERN_WARNING "Dropping SNDU, MAC address.\n" ); | |
642 | dev_kfree_skb( priv->ule_skb ); | |
643 | goto sndu_done; | |
644 | } | |
645 | if (! priv->ule_bridged) { | |
646 | skb_push( priv->ule_skb, ETH_ALEN + 2 ); | |
647 | ethh = (struct ethhdr *)priv->ule_skb->data; | |
648 | memcpy( ethh->h_dest, ethh->h_source, ETH_ALEN ); | |
649 | memset( ethh->h_source, 0, ETH_ALEN ); | |
650 | ethh->h_proto = htons( priv->ule_sndu_type ); | |
651 | } else { | |
652 | /* Skip the Receiver destination MAC address. */ | |
653 | skb_pull( priv->ule_skb, ETH_ALEN ); | |
654 | } | |
655 | } else { | |
656 | if (! priv->ule_bridged) { | |
657 | skb_push( priv->ule_skb, ETH_HLEN ); | |
658 | ethh = (struct ethhdr *)priv->ule_skb->data; | |
659 | memcpy( ethh->h_dest, dev->dev_addr, ETH_ALEN ); | |
660 | memset( ethh->h_source, 0, ETH_ALEN ); | |
661 | ethh->h_proto = htons( priv->ule_sndu_type ); | |
662 | } else { | |
663 | /* skb is in correct state; nothing to do. */ | |
664 | } | |
665 | } | |
666 | priv->ule_bridged = 0; | |
667 | ||
668 | /* Stuff into kernel's protocol stack. */ | |
669 | priv->ule_skb->protocol = dvb_net_eth_type_trans(priv->ule_skb, dev); | |
670 | /* If D-bit is set (i.e. destination MAC address not present), | |
671 | * receive the packet anyhow. */ | |
672 | /* if (priv->ule_dbit && skb->pkt_type == PACKET_OTHERHOST) | |
673 | priv->ule_skb->pkt_type = PACKET_HOST; */ | |
674 | ((struct dvb_net_priv *) dev->priv)->stats.rx_packets++; | |
675 | ((struct dvb_net_priv *) dev->priv)->stats.rx_bytes += priv->ule_skb->len; | |
676 | netif_rx(priv->ule_skb); | |
677 | } | |
678 | sndu_done: | |
679 | /* Prepare for next SNDU. */ | |
680 | reset_ule(priv); | |
681 | } | |
682 | ||
683 | /* More data in current TS (look at the bytes following the CRC32)? */ | |
684 | if (ts_remain >= 2 && *((unsigned short *)from_where) != 0xFFFF) { | |
685 | /* Next ULE SNDU starts right there. */ | |
686 | new_ts = 0; | |
687 | priv->ule_skb = NULL; | |
688 | priv->ule_sndu_type_1 = 0; | |
689 | priv->ule_sndu_len = 0; | |
690 | // printk(KERN_WARNING "More data in current TS: [%#x %#x %#x %#x]\n", | |
691 | // *(from_where + 0), *(from_where + 1), | |
692 | // *(from_where + 2), *(from_where + 3)); | |
693 | // printk(KERN_WARNING "ts @ %p, stopped @ %p:\n", ts, from_where + 0); | |
694 | // hexdump(ts, 188); | |
695 | } else { | |
696 | new_ts = 1; | |
697 | ts += TS_SZ; | |
698 | priv->ts_count++; | |
699 | if (priv->ule_skb == NULL) { | |
700 | priv->need_pusi = 1; | |
701 | priv->ule_sndu_type_1 = 0; | |
702 | priv->ule_sndu_len = 0; | |
703 | } | |
704 | } | |
705 | } /* for all available TS cells */ | |
706 | } | |
707 | ||
708 | static int dvb_net_ts_callback(const u8 *buffer1, size_t buffer1_len, | |
709 | const u8 *buffer2, size_t buffer2_len, | |
710 | struct dmx_ts_feed *feed, enum dmx_success success) | |
711 | { | |
712 | struct net_device *dev = (struct net_device *)feed->priv; | |
713 | ||
714 | if (buffer2 != 0) | |
715 | printk(KERN_WARNING "buffer2 not 0: %p.\n", buffer2); | |
716 | if (buffer1_len > 32768) | |
717 | printk(KERN_WARNING "length > 32k: %zu.\n", buffer1_len); | |
718 | /* printk("TS callback: %u bytes, %u TS cells @ %p.\n", | |
719 | buffer1_len, buffer1_len / TS_SZ, buffer1); */ | |
720 | dvb_net_ule(dev, buffer1, buffer1_len); | |
721 | return 0; | |
722 | } | |
723 | ||
724 | ||
725 | static void dvb_net_sec(struct net_device *dev, u8 *pkt, int pkt_len) | |
726 | { | |
727 | u8 *eth; | |
728 | struct sk_buff *skb; | |
729 | struct net_device_stats *stats = &(((struct dvb_net_priv *) dev->priv)->stats); | |
730 | ||
731 | /* note: pkt_len includes a 32bit checksum */ | |
732 | if (pkt_len < 16) { | |
733 | printk("%s: IP/MPE packet length = %d too small.\n", | |
734 | dev->name, pkt_len); | |
735 | stats->rx_errors++; | |
736 | stats->rx_length_errors++; | |
737 | return; | |
738 | } | |
739 | /* it seems some ISPs manage to screw up here, so we have to | |
740 | * relax the error checks... */ | |
741 | #if 0 | |
742 | if ((pkt[5] & 0xfd) != 0xc1) { | |
743 | /* drop scrambled or broken packets */ | |
744 | #else | |
745 | if ((pkt[5] & 0x3c) != 0x00) { | |
746 | /* drop scrambled */ | |
747 | #endif | |
748 | stats->rx_errors++; | |
749 | stats->rx_crc_errors++; | |
750 | return; | |
751 | } | |
752 | if (pkt[5] & 0x02) { | |
753 | //FIXME: handle LLC/SNAP | |
754 | stats->rx_dropped++; | |
755 | return; | |
756 | } | |
757 | if (pkt[7]) { | |
758 | /* FIXME: assemble datagram from multiple sections */ | |
759 | stats->rx_errors++; | |
760 | stats->rx_frame_errors++; | |
761 | return; | |
762 | } | |
763 | ||
764 | /* we have 14 byte ethernet header (ip header follows); | |
765 | * 12 byte MPE header; 4 byte checksum; + 2 byte alignment | |
766 | */ | |
767 | if (!(skb = dev_alloc_skb(pkt_len - 4 - 12 + 14 + 2))) { | |
768 | //printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n", dev->name); | |
769 | stats->rx_dropped++; | |
770 | return; | |
771 | } | |
772 | skb_reserve(skb, 2); /* longword align L3 header */ | |
773 | skb->dev = dev; | |
774 | ||
775 | /* copy L3 payload */ | |
776 | eth = (u8 *) skb_put(skb, pkt_len - 12 - 4 + 14); | |
777 | memcpy(eth + 14, pkt + 12, pkt_len - 12 - 4); | |
778 | ||
779 | /* create ethernet header: */ | |
780 | eth[0]=pkt[0x0b]; | |
781 | eth[1]=pkt[0x0a]; | |
782 | eth[2]=pkt[0x09]; | |
783 | eth[3]=pkt[0x08]; | |
784 | eth[4]=pkt[0x04]; | |
785 | eth[5]=pkt[0x03]; | |
786 | ||
787 | eth[6]=eth[7]=eth[8]=eth[9]=eth[10]=eth[11]=0; | |
788 | ||
789 | eth[12] = 0x08; /* ETH_P_IP */ | |
790 | eth[13] = 0x00; | |
791 | ||
792 | skb->protocol = dvb_net_eth_type_trans(skb, dev); | |
793 | ||
794 | stats->rx_packets++; | |
795 | stats->rx_bytes+=skb->len; | |
796 | netif_rx(skb); | |
797 | } | |
798 | ||
799 | static int dvb_net_sec_callback(const u8 *buffer1, size_t buffer1_len, | |
800 | const u8 *buffer2, size_t buffer2_len, | |
801 | struct dmx_section_filter *filter, | |
802 | enum dmx_success success) | |
803 | { | |
804 | struct net_device *dev=(struct net_device *) filter->priv; | |
805 | ||
806 | /** | |
807 | * we rely on the DVB API definition where exactly one complete | |
808 | * section is delivered in buffer1 | |
809 | */ | |
810 | dvb_net_sec (dev, (u8*) buffer1, buffer1_len); | |
811 | return 0; | |
812 | } | |
813 | ||
814 | static int dvb_net_tx(struct sk_buff *skb, struct net_device *dev) | |
815 | { | |
816 | dev_kfree_skb(skb); | |
817 | return 0; | |
818 | } | |
819 | ||
820 | static u8 mask_normal[6]={0xff, 0xff, 0xff, 0xff, 0xff, 0xff}; | |
821 | static u8 mask_allmulti[6]={0xff, 0xff, 0xff, 0x00, 0x00, 0x00}; | |
822 | static u8 mac_allmulti[6]={0x01, 0x00, 0x5e, 0x00, 0x00, 0x00}; | |
823 | static u8 mask_promisc[6]={0x00, 0x00, 0x00, 0x00, 0x00, 0x00}; | |
824 | ||
825 | static int dvb_net_filter_sec_set(struct net_device *dev, | |
826 | struct dmx_section_filter **secfilter, | |
827 | u8 *mac, u8 *mac_mask) | |
828 | { | |
829 | struct dvb_net_priv *priv = (struct dvb_net_priv*) dev->priv; | |
830 | int ret; | |
831 | ||
832 | *secfilter=NULL; | |
833 | ret = priv->secfeed->allocate_filter(priv->secfeed, secfilter); | |
834 | if (ret<0) { | |
835 | printk("%s: could not get filter\n", dev->name); | |
836 | return ret; | |
837 | } | |
838 | ||
839 | (*secfilter)->priv=(void *) dev; | |
840 | ||
841 | memset((*secfilter)->filter_value, 0x00, DMX_MAX_FILTER_SIZE); | |
842 | memset((*secfilter)->filter_mask, 0x00, DMX_MAX_FILTER_SIZE); | |
843 | memset((*secfilter)->filter_mode, 0xff, DMX_MAX_FILTER_SIZE); | |
844 | ||
845 | (*secfilter)->filter_value[0]=0x3e; | |
846 | (*secfilter)->filter_value[3]=mac[5]; | |
847 | (*secfilter)->filter_value[4]=mac[4]; | |
848 | (*secfilter)->filter_value[8]=mac[3]; | |
849 | (*secfilter)->filter_value[9]=mac[2]; | |
850 | (*secfilter)->filter_value[10]=mac[1]; | |
851 | (*secfilter)->filter_value[11]=mac[0]; | |
852 | ||
853 | (*secfilter)->filter_mask[0] = 0xff; | |
854 | (*secfilter)->filter_mask[3] = mac_mask[5]; | |
855 | (*secfilter)->filter_mask[4] = mac_mask[4]; | |
856 | (*secfilter)->filter_mask[8] = mac_mask[3]; | |
857 | (*secfilter)->filter_mask[9] = mac_mask[2]; | |
858 | (*secfilter)->filter_mask[10] = mac_mask[1]; | |
859 | (*secfilter)->filter_mask[11]=mac_mask[0]; | |
860 | ||
861 | dprintk("%s: filter mac=%02x %02x %02x %02x %02x %02x\n", | |
862 | dev->name, mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]); | |
863 | dprintk("%s: filter mask=%02x %02x %02x %02x %02x %02x\n", | |
864 | dev->name, mac_mask[0], mac_mask[1], mac_mask[2], | |
865 | mac_mask[3], mac_mask[4], mac_mask[5]); | |
866 | ||
867 | return 0; | |
868 | } | |
869 | ||
870 | static int dvb_net_feed_start(struct net_device *dev) | |
871 | { | |
872 | int ret, i; | |
873 | struct dvb_net_priv *priv = (struct dvb_net_priv*) dev->priv; | |
874 | struct dmx_demux *demux = priv->demux; | |
875 | unsigned char *mac = (unsigned char *) dev->dev_addr; | |
876 | ||
877 | dprintk("%s: rx_mode %i\n", __FUNCTION__, priv->rx_mode); | |
878 | if (priv->tsfeed || priv->secfeed || priv->secfilter || priv->multi_secfilter[0]) | |
879 | printk("%s: BUG %d\n", __FUNCTION__, __LINE__); | |
880 | ||
881 | priv->secfeed=NULL; | |
882 | priv->secfilter=NULL; | |
883 | priv->tsfeed = NULL; | |
884 | ||
885 | if (priv->feedtype == DVB_NET_FEEDTYPE_MPE) { | |
886 | dprintk("%s: alloc secfeed\n", __FUNCTION__); | |
887 | ret=demux->allocate_section_feed(demux, &priv->secfeed, | |
888 | dvb_net_sec_callback); | |
889 | if (ret<0) { | |
890 | printk("%s: could not allocate section feed\n", dev->name); | |
891 | return ret; | |
892 | } | |
893 | ||
894 | ret = priv->secfeed->set(priv->secfeed, priv->pid, 32768, 0, 1); | |
895 | ||
896 | if (ret<0) { | |
897 | printk("%s: could not set section feed\n", dev->name); | |
898 | priv->demux->release_section_feed(priv->demux, priv->secfeed); | |
899 | priv->secfeed=NULL; | |
900 | return ret; | |
901 | } | |
902 | ||
903 | if (priv->rx_mode != RX_MODE_PROMISC) { | |
904 | dprintk("%s: set secfilter\n", __FUNCTION__); | |
905 | dvb_net_filter_sec_set(dev, &priv->secfilter, mac, mask_normal); | |
906 | } | |
907 | ||
908 | switch (priv->rx_mode) { | |
909 | case RX_MODE_MULTI: | |
910 | for (i = 0; i < priv->multi_num; i++) { | |
911 | dprintk("%s: set multi_secfilter[%d]\n", __FUNCTION__, i); | |
912 | dvb_net_filter_sec_set(dev, &priv->multi_secfilter[i], | |
913 | priv->multi_macs[i], mask_normal); | |
914 | } | |
915 | break; | |
916 | case RX_MODE_ALL_MULTI: | |
917 | priv->multi_num=1; | |
918 | dprintk("%s: set multi_secfilter[0]\n", __FUNCTION__); | |
919 | dvb_net_filter_sec_set(dev, &priv->multi_secfilter[0], | |
920 | mac_allmulti, mask_allmulti); | |
921 | break; | |
922 | case RX_MODE_PROMISC: | |
923 | priv->multi_num=0; | |
924 | dprintk("%s: set secfilter\n", __FUNCTION__); | |
925 | dvb_net_filter_sec_set(dev, &priv->secfilter, mac, mask_promisc); | |
926 | break; | |
927 | } | |
928 | ||
929 | dprintk("%s: start filtering\n", __FUNCTION__); | |
930 | priv->secfeed->start_filtering(priv->secfeed); | |
931 | } else if (priv->feedtype == DVB_NET_FEEDTYPE_ULE) { | |
932 | struct timespec timeout = { 0, 30000000 }; // 30 msec | |
933 | ||
934 | /* we have payloads encapsulated in TS */ | |
935 | dprintk("%s: alloc tsfeed\n", __FUNCTION__); | |
936 | ret = demux->allocate_ts_feed(demux, &priv->tsfeed, dvb_net_ts_callback); | |
937 | if (ret < 0) { | |
938 | printk("%s: could not allocate ts feed\n", dev->name); | |
939 | return ret; | |
940 | } | |
941 | ||
942 | /* Set netdevice pointer for ts decaps callback. */ | |
943 | priv->tsfeed->priv = (void *)dev; | |
944 | ret = priv->tsfeed->set(priv->tsfeed, priv->pid, | |
945 | TS_PACKET, DMX_TS_PES_OTHER, | |
946 | 188 * 100, /* nr. of bytes delivered per callback */ | |
947 | 32768, /* circular buffer size */ | |
948 | 0, /* descramble */ | |
949 | timeout); | |
950 | ||
951 | if (ret < 0) { | |
952 | printk("%s: could not set ts feed\n", dev->name); | |
953 | priv->demux->release_ts_feed(priv->demux, priv->tsfeed); | |
954 | priv->tsfeed = NULL; | |
955 | return ret; | |
956 | } | |
957 | ||
958 | dprintk("%s: start filtering\n", __FUNCTION__); | |
959 | priv->tsfeed->start_filtering(priv->tsfeed); | |
960 | } else | |
961 | return -EINVAL; | |
962 | ||
963 | return 0; | |
964 | } | |
965 | ||
966 | static int dvb_net_feed_stop(struct net_device *dev) | |
967 | { | |
968 | struct dvb_net_priv *priv = (struct dvb_net_priv*) dev->priv; | |
969 | int i; | |
970 | ||
971 | dprintk("%s\n", __FUNCTION__); | |
972 | if (priv->feedtype == DVB_NET_FEEDTYPE_MPE) { | |
973 | if (priv->secfeed) { | |
974 | if (priv->secfeed->is_filtering) { | |
975 | dprintk("%s: stop secfeed\n", __FUNCTION__); | |
976 | priv->secfeed->stop_filtering(priv->secfeed); | |
977 | } | |
978 | ||
979 | if (priv->secfilter) { | |
980 | dprintk("%s: release secfilter\n", __FUNCTION__); | |
981 | priv->secfeed->release_filter(priv->secfeed, | |
982 | priv->secfilter); | |
983 | priv->secfilter=NULL; | |
984 | } | |
985 | ||
986 | for (i=0; i<priv->multi_num; i++) { | |
987 | if (priv->multi_secfilter[i]) { | |
988 | dprintk("%s: release multi_filter[%d]\n", | |
989 | __FUNCTION__, i); | |
990 | priv->secfeed->release_filter(priv->secfeed, | |
991 | priv->multi_secfilter[i]); | |
992 | priv->multi_secfilter[i] = NULL; | |
993 | } | |
994 | } | |
995 | ||
996 | priv->demux->release_section_feed(priv->demux, priv->secfeed); | |
997 | priv->secfeed = NULL; | |
998 | } else | |
999 | printk("%s: no feed to stop\n", dev->name); | |
1000 | } else if (priv->feedtype == DVB_NET_FEEDTYPE_ULE) { | |
1001 | if (priv->tsfeed) { | |
1002 | if (priv->tsfeed->is_filtering) { | |
1003 | dprintk("%s: stop tsfeed\n", __FUNCTION__); | |
1004 | priv->tsfeed->stop_filtering(priv->tsfeed); | |
1005 | } | |
1006 | priv->demux->release_ts_feed(priv->demux, priv->tsfeed); | |
1007 | priv->tsfeed = NULL; | |
1008 | } | |
1009 | else | |
1010 | printk("%s: no ts feed to stop\n", dev->name); | |
1011 | } else | |
1012 | return -EINVAL; | |
1013 | return 0; | |
1014 | } | |
1015 | ||
1016 | ||
1017 | static int dvb_set_mc_filter (struct net_device *dev, struct dev_mc_list *mc) | |
1018 | { | |
1019 | struct dvb_net_priv *priv = (struct dvb_net_priv*) dev->priv; | |
1020 | ||
1021 | if (priv->multi_num == DVB_NET_MULTICAST_MAX) | |
1022 | return -ENOMEM; | |
1023 | ||
1024 | memcpy(priv->multi_macs[priv->multi_num], mc->dmi_addr, 6); | |
1025 | ||
1026 | priv->multi_num++; | |
1027 | return 0; | |
1028 | } | |
1029 | ||
1030 | ||
1031 | static void wq_set_multicast_list (void *data) | |
1032 | { | |
1033 | struct net_device *dev = data; | |
1034 | struct dvb_net_priv *priv = (struct dvb_net_priv*) dev->priv; | |
1035 | ||
1036 | dvb_net_feed_stop(dev); | |
1037 | ||
1038 | priv->rx_mode = RX_MODE_UNI; | |
1039 | ||
1040 | if (dev->flags & IFF_PROMISC) { | |
1041 | dprintk("%s: promiscuous mode\n", dev->name); | |
1042 | priv->rx_mode = RX_MODE_PROMISC; | |
1043 | } else if ((dev->flags & IFF_ALLMULTI)) { | |
1044 | dprintk("%s: allmulti mode\n", dev->name); | |
1045 | priv->rx_mode = RX_MODE_ALL_MULTI; | |
1046 | } else if (dev->mc_count) { | |
1047 | int mci; | |
1048 | struct dev_mc_list *mc; | |
1049 | ||
1050 | dprintk("%s: set_mc_list, %d entries\n", | |
1051 | dev->name, dev->mc_count); | |
1052 | ||
1053 | priv->rx_mode = RX_MODE_MULTI; | |
1054 | priv->multi_num = 0; | |
1055 | ||
1056 | for (mci = 0, mc=dev->mc_list; | |
1057 | mci < dev->mc_count; | |
1058 | mc = mc->next, mci++) { | |
1059 | dvb_set_mc_filter(dev, mc); | |
1060 | } | |
1061 | } | |
1062 | ||
1063 | dvb_net_feed_start(dev); | |
1064 | } | |
1065 | ||
1066 | ||
1067 | static void dvb_net_set_multicast_list (struct net_device *dev) | |
1068 | { | |
1069 | struct dvb_net_priv *priv = (struct dvb_net_priv*) dev->priv; | |
1070 | schedule_work(&priv->set_multicast_list_wq); | |
1071 | } | |
1072 | ||
1073 | ||
1074 | static void wq_restart_net_feed (void *data) | |
1075 | { | |
1076 | struct net_device *dev = data; | |
1077 | ||
1078 | if (netif_running(dev)) { | |
1079 | dvb_net_feed_stop(dev); | |
1080 | dvb_net_feed_start(dev); | |
1081 | } | |
1082 | } | |
1083 | ||
1084 | ||
1085 | static int dvb_net_set_mac (struct net_device *dev, void *p) | |
1086 | { | |
1087 | struct dvb_net_priv *priv = (struct dvb_net_priv*) dev->priv; | |
1088 | struct sockaddr *addr=p; | |
1089 | ||
1090 | memcpy(dev->dev_addr, addr->sa_data, dev->addr_len); | |
1091 | ||
1092 | if (netif_running(dev)) | |
1093 | schedule_work(&priv->restart_net_feed_wq); | |
1094 | ||
1095 | return 0; | |
1096 | } | |
1097 | ||
1098 | ||
1099 | static int dvb_net_open(struct net_device *dev) | |
1100 | { | |
1101 | struct dvb_net_priv *priv = (struct dvb_net_priv*) dev->priv; | |
1102 | ||
1103 | priv->in_use++; | |
1104 | dvb_net_feed_start(dev); | |
1105 | return 0; | |
1106 | } | |
1107 | ||
1108 | ||
1109 | static int dvb_net_stop(struct net_device *dev) | |
1110 | { | |
1111 | struct dvb_net_priv *priv = (struct dvb_net_priv*) dev->priv; | |
1112 | ||
1113 | priv->in_use--; | |
1114 | return dvb_net_feed_stop(dev); | |
1115 | } | |
1116 | ||
1117 | static struct net_device_stats * dvb_net_get_stats(struct net_device *dev) | |
1118 | { | |
1119 | return &((struct dvb_net_priv*) dev->priv)->stats; | |
1120 | } | |
1121 | ||
1122 | static void dvb_net_setup(struct net_device *dev) | |
1123 | { | |
1124 | ether_setup(dev); | |
1125 | ||
1126 | dev->open = dvb_net_open; | |
1127 | dev->stop = dvb_net_stop; | |
1128 | dev->hard_start_xmit = dvb_net_tx; | |
1129 | dev->get_stats = dvb_net_get_stats; | |
1130 | dev->set_multicast_list = dvb_net_set_multicast_list; | |
1131 | dev->set_mac_address = dvb_net_set_mac; | |
1132 | dev->mtu = 4096; | |
1133 | dev->mc_count = 0; | |
1134 | dev->hard_header_cache = NULL; | |
1135 | dev->flags |= IFF_NOARP; | |
1136 | } | |
1137 | ||
1138 | static int get_if(struct dvb_net *dvbnet) | |
1139 | { | |
1140 | int i; | |
1141 | ||
1142 | for (i=0; i<DVB_NET_DEVICES_MAX; i++) | |
1143 | if (!dvbnet->state[i]) | |
1144 | break; | |
1145 | ||
1146 | if (i == DVB_NET_DEVICES_MAX) | |
1147 | return -1; | |
1148 | ||
1149 | dvbnet->state[i]=1; | |
1150 | return i; | |
1151 | } | |
1152 | ||
1153 | static int dvb_net_add_if(struct dvb_net *dvbnet, u16 pid, u8 feedtype) | |
1154 | { | |
1155 | struct net_device *net; | |
1156 | struct dvb_net_priv *priv; | |
1157 | int result; | |
1158 | int if_num; | |
1159 | ||
1160 | if (feedtype != DVB_NET_FEEDTYPE_MPE && feedtype != DVB_NET_FEEDTYPE_ULE) | |
1161 | return -EINVAL; | |
1162 | if ((if_num = get_if(dvbnet)) < 0) | |
1163 | return -EINVAL; | |
1164 | ||
1165 | net = alloc_netdev(sizeof(struct dvb_net_priv), "dvb", dvb_net_setup); | |
1166 | if (!net) | |
1167 | return -ENOMEM; | |
1168 | ||
1169 | if (dvbnet->dvbdev->id) | |
1170 | snprintf(net->name, IFNAMSIZ, "dvb%d%u%d", | |
1171 | dvbnet->dvbdev->adapter->num, dvbnet->dvbdev->id, if_num); | |
1172 | else | |
1173 | /* compatibility fix to keep dvb0_0 format */ | |
1174 | snprintf(net->name, IFNAMSIZ, "dvb%d_%d", | |
1175 | dvbnet->dvbdev->adapter->num, if_num); | |
1176 | ||
1177 | net->addr_len = 6; | |
1178 | memcpy(net->dev_addr, dvbnet->dvbdev->adapter->proposed_mac, 6); | |
1179 | ||
1180 | dvbnet->device[if_num] = net; | |
1181 | ||
1182 | priv = net->priv; | |
1183 | priv->demux = dvbnet->demux; | |
1184 | priv->pid = pid; | |
1185 | priv->rx_mode = RX_MODE_UNI; | |
1186 | priv->need_pusi = 1; | |
1187 | priv->tscc = 0; | |
1188 | priv->feedtype = feedtype; | |
1189 | reset_ule(priv); | |
1190 | ||
1191 | INIT_WORK(&priv->set_multicast_list_wq, wq_set_multicast_list, net); | |
1192 | INIT_WORK(&priv->restart_net_feed_wq, wq_restart_net_feed, net); | |
1193 | ||
1194 | net->base_addr = pid; | |
1195 | ||
1196 | if ((result = register_netdev(net)) < 0) { | |
1197 | dvbnet->device[if_num] = NULL; | |
1198 | free_netdev(net); | |
1199 | return result; | |
1200 | } | |
1201 | printk("dvb_net: created network interface %s\n", net->name); | |
1202 | ||
1203 | return if_num; | |
1204 | } | |
1205 | ||
1206 | static int dvb_net_remove_if(struct dvb_net *dvbnet, unsigned int num) | |
1207 | { | |
1208 | struct net_device *net = dvbnet->device[num]; | |
1209 | struct dvb_net_priv *priv; | |
1210 | ||
1211 | if (!dvbnet->state[num]) | |
1212 | return -EINVAL; | |
1213 | priv = net->priv; | |
1214 | if (priv->in_use) | |
1215 | return -EBUSY; | |
1216 | ||
1217 | dvb_net_stop(net); | |
1218 | flush_scheduled_work(); | |
1219 | printk("dvb_net: removed network interface %s\n", net->name); | |
1220 | unregister_netdev(net); | |
1221 | dvbnet->state[num]=0; | |
1222 | dvbnet->device[num] = NULL; | |
1223 | free_netdev(net); | |
1224 | ||
1225 | return 0; | |
1226 | } | |
1227 | ||
1228 | static int dvb_net_do_ioctl(struct inode *inode, struct file *file, | |
1229 | unsigned int cmd, void *parg) | |
1230 | { | |
1231 | struct dvb_device *dvbdev = (struct dvb_device *) file->private_data; | |
1232 | struct dvb_net *dvbnet = (struct dvb_net *) dvbdev->priv; | |
1233 | ||
1234 | if (((file->f_flags&O_ACCMODE)==O_RDONLY)) | |
1235 | return -EPERM; | |
1236 | ||
1237 | switch (cmd) { | |
1238 | case NET_ADD_IF: | |
1239 | { | |
1240 | struct dvb_net_if *dvbnetif=(struct dvb_net_if *)parg; | |
1241 | int result; | |
1242 | ||
1243 | if (!capable(CAP_SYS_ADMIN)) | |
1244 | return -EPERM; | |
1245 | ||
1246 | if (!try_module_get(dvbdev->adapter->module)) | |
1247 | return -EPERM; | |
1248 | ||
1249 | result=dvb_net_add_if(dvbnet, dvbnetif->pid, dvbnetif->feedtype); | |
1250 | if (result<0) { | |
1251 | module_put(dvbdev->adapter->module); | |
1252 | return result; | |
1253 | } | |
1254 | dvbnetif->if_num=result; | |
1255 | break; | |
1256 | } | |
1257 | case NET_GET_IF: | |
1258 | { | |
1259 | struct net_device *netdev; | |
1260 | struct dvb_net_priv *priv_data; | |
1261 | struct dvb_net_if *dvbnetif=(struct dvb_net_if *)parg; | |
1262 | ||
1263 | if (dvbnetif->if_num >= DVB_NET_DEVICES_MAX || | |
1264 | !dvbnet->state[dvbnetif->if_num]) | |
1265 | return -EINVAL; | |
1266 | ||
1267 | netdev = dvbnet->device[dvbnetif->if_num]; | |
1268 | ||
1269 | priv_data=(struct dvb_net_priv*)netdev->priv; | |
1270 | dvbnetif->pid=priv_data->pid; | |
1271 | dvbnetif->feedtype=priv_data->feedtype; | |
1272 | break; | |
1273 | } | |
1274 | case NET_REMOVE_IF: | |
1275 | { | |
1276 | int ret; | |
1277 | ||
1278 | if (!capable(CAP_SYS_ADMIN)) | |
1279 | return -EPERM; | |
1280 | if ((unsigned int) parg >= DVB_NET_DEVICES_MAX) | |
1281 | return -EINVAL; | |
1282 | ret = dvb_net_remove_if(dvbnet, (unsigned int) parg); | |
1283 | if (!ret) | |
1284 | module_put(dvbdev->adapter->module); | |
1285 | return ret; | |
1286 | } | |
1287 | ||
1288 | /* binary compatiblity cruft */ | |
1289 | case __NET_ADD_IF_OLD: | |
1290 | { | |
1291 | struct __dvb_net_if_old *dvbnetif=(struct __dvb_net_if_old *)parg; | |
1292 | int result; | |
1293 | ||
1294 | if (!capable(CAP_SYS_ADMIN)) | |
1295 | return -EPERM; | |
1296 | ||
1297 | if (!try_module_get(dvbdev->adapter->module)) | |
1298 | return -EPERM; | |
1299 | ||
1300 | result=dvb_net_add_if(dvbnet, dvbnetif->pid, DVB_NET_FEEDTYPE_MPE); | |
1301 | if (result<0) { | |
1302 | module_put(dvbdev->adapter->module); | |
1303 | return result; | |
1304 | } | |
1305 | dvbnetif->if_num=result; | |
1306 | break; | |
1307 | } | |
1308 | case __NET_GET_IF_OLD: | |
1309 | { | |
1310 | struct net_device *netdev; | |
1311 | struct dvb_net_priv *priv_data; | |
1312 | struct __dvb_net_if_old *dvbnetif=(struct __dvb_net_if_old *)parg; | |
1313 | ||
1314 | if (dvbnetif->if_num >= DVB_NET_DEVICES_MAX || | |
1315 | !dvbnet->state[dvbnetif->if_num]) | |
1316 | return -EINVAL; | |
1317 | ||
1318 | netdev = dvbnet->device[dvbnetif->if_num]; | |
1319 | ||
1320 | priv_data=(struct dvb_net_priv*)netdev->priv; | |
1321 | dvbnetif->pid=priv_data->pid; | |
1322 | break; | |
1323 | } | |
1324 | default: | |
1325 | return -ENOTTY; | |
1326 | } | |
1327 | return 0; | |
1328 | } | |
1329 | ||
1330 | static int dvb_net_ioctl(struct inode *inode, struct file *file, | |
1331 | unsigned int cmd, unsigned long arg) | |
1332 | { | |
1333 | return dvb_usercopy(inode, file, cmd, arg, dvb_net_do_ioctl); | |
1334 | } | |
1335 | ||
1336 | static struct file_operations dvb_net_fops = { | |
1337 | .owner = THIS_MODULE, | |
1338 | .ioctl = dvb_net_ioctl, | |
1339 | .open = dvb_generic_open, | |
1340 | .release = dvb_generic_release, | |
1341 | }; | |
1342 | ||
1343 | static struct dvb_device dvbdev_net = { | |
1344 | .priv = NULL, | |
1345 | .users = 1, | |
1346 | .writers = 1, | |
1347 | .fops = &dvb_net_fops, | |
1348 | }; | |
1349 | ||
1350 | ||
1351 | void dvb_net_release (struct dvb_net *dvbnet) | |
1352 | { | |
1353 | int i; | |
1354 | ||
1355 | dvb_unregister_device(dvbnet->dvbdev); | |
1356 | ||
1357 | for (i=0; i<DVB_NET_DEVICES_MAX; i++) { | |
1358 | if (!dvbnet->state[i]) | |
1359 | continue; | |
1360 | dvb_net_remove_if(dvbnet, i); | |
1361 | } | |
1362 | } | |
1363 | EXPORT_SYMBOL(dvb_net_release); | |
1364 | ||
1365 | ||
1366 | int dvb_net_init (struct dvb_adapter *adap, struct dvb_net *dvbnet, | |
1367 | struct dmx_demux *dmx) | |
1368 | { | |
1369 | int i; | |
1370 | ||
1371 | dvbnet->demux = dmx; | |
1372 | ||
1373 | for (i=0; i<DVB_NET_DEVICES_MAX; i++) | |
1374 | dvbnet->state[i] = 0; | |
1375 | ||
1376 | dvb_register_device (adap, &dvbnet->dvbdev, &dvbdev_net, | |
1377 | dvbnet, DVB_DEVICE_NET); | |
1378 | ||
1379 | return 0; | |
1380 | } | |
1381 | EXPORT_SYMBOL(dvb_net_init); |