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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> | |
1da177e4 LT |
65 | |
66 | #include "dvb_demux.h" | |
67 | #include "dvb_net.h" | |
68 | ||
69 | static int dvb_net_debug; | |
70 | module_param(dvb_net_debug, int, 0444); | |
71 | MODULE_PARM_DESC(dvb_net_debug, "enable debug messages"); | |
72 | ||
73 | #define dprintk(x...) do { if (dvb_net_debug) printk(x); } while (0) | |
74 | ||
75 | ||
76 | static inline __u32 iov_crc32( __u32 c, struct kvec *iov, unsigned int cnt ) | |
77 | { | |
78 | unsigned int j; | |
79 | for (j = 0; j < cnt; j++) | |
80 | c = crc32_be( c, iov[j].iov_base, iov[j].iov_len ); | |
81 | return c; | |
82 | } | |
83 | ||
84 | ||
85 | #define DVB_NET_MULTICAST_MAX 10 | |
86 | ||
87 | #undef ULE_DEBUG | |
88 | ||
89 | #ifdef ULE_DEBUG | |
90 | ||
91 | #define isprint(c) ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || (c >= '0' && c <= '9')) | |
92 | ||
93 | static void hexdump( const unsigned char *buf, unsigned short len ) | |
94 | { | |
95 | char str[80], octet[10]; | |
96 | int ofs, i, l; | |
97 | ||
98 | for (ofs = 0; ofs < len; ofs += 16) { | |
99 | sprintf( str, "%03d: ", ofs ); | |
100 | ||
101 | for (i = 0; i < 16; i++) { | |
102 | if ((i + ofs) < len) | |
103 | sprintf( octet, "%02x ", buf[ofs + i] ); | |
104 | else | |
105 | strcpy( octet, " " ); | |
106 | ||
107 | strcat( str, octet ); | |
108 | } | |
109 | strcat( str, " " ); | |
110 | l = strlen( str ); | |
111 | ||
112 | for (i = 0; (i < 16) && ((i + ofs) < len); i++) | |
113 | str[l++] = isprint( buf[ofs + i] ) ? buf[ofs + i] : '.'; | |
114 | ||
115 | str[l] = '\0'; | |
116 | printk( KERN_WARNING "%s\n", str ); | |
117 | } | |
118 | } | |
119 | ||
120 | #endif | |
121 | ||
122 | struct dvb_net_priv { | |
123 | int in_use; | |
124 | struct net_device_stats stats; | |
125 | u16 pid; | |
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; | |
131 | int multi_num; | |
132 | struct dmx_section_filter *multi_secfilter[DVB_NET_MULTICAST_MAX]; | |
133 | unsigned char multi_macs[DVB_NET_MULTICAST_MAX][6]; | |
134 | int rx_mode; | |
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. */ | |
1130ca45 RM |
154 | |
155 | struct semaphore mutex; | |
1da177e4 LT |
156 | }; |
157 | ||
158 | ||
159 | /** | |
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. | |
163 | * | |
164 | * stolen from eth.c out of the linux kernel, hacked for dvb-device | |
165 | * by Michael Holzt <kju@debian.org> | |
166 | */ | |
167 | static unsigned short dvb_net_eth_type_trans(struct sk_buff *skb, | |
168 | struct net_device *dev) | |
169 | { | |
170 | struct ethhdr *eth; | |
171 | unsigned char *rawp; | |
172 | ||
173 | skb->mac.raw=skb->data; | |
174 | skb_pull(skb,dev->hard_header_len); | |
1da177e4 | 175 | eth = eth_hdr(skb); |
1da177e4 LT |
176 | |
177 | if (*eth->h_dest & 1) { | |
178 | if(memcmp(eth->h_dest,dev->broadcast, ETH_ALEN)==0) | |
179 | skb->pkt_type=PACKET_BROADCAST; | |
180 | else | |
181 | skb->pkt_type=PACKET_MULTICAST; | |
182 | } | |
183 | ||
184 | if (ntohs(eth->h_proto) >= 1536) | |
185 | return eth->h_proto; | |
186 | ||
187 | rawp = skb->data; | |
188 | ||
189 | /** | |
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. | |
194 | */ | |
195 | if (*(unsigned short *)rawp == 0xFFFF) | |
196 | return htons(ETH_P_802_3); | |
197 | ||
198 | /** | |
199 | * Real 802.2 LLC | |
200 | */ | |
201 | return htons(ETH_P_802_2); | |
202 | } | |
203 | ||
204 | #define TS_SZ 188 | |
205 | #define TS_SYNC 0x47 | |
206 | #define TS_TEI 0x80 | |
207 | #define TS_SC 0xC0 | |
208 | #define TS_PUSI 0x40 | |
209 | #define TS_AF_A 0x20 | |
210 | #define TS_AF_D 0x10 | |
211 | ||
212 | /* ULE Extension Header handlers. */ | |
213 | ||
214 | #define ULE_TEST 0 | |
215 | #define ULE_BRIDGED 1 | |
216 | ||
217 | static int ule_test_sndu( struct dvb_net_priv *p ) | |
218 | { | |
219 | return -1; | |
220 | } | |
221 | ||
222 | static int ule_bridged_sndu( struct dvb_net_priv *p ) | |
223 | { | |
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. | |
226 | * Blame the authors! | |
227 | */ | |
228 | p->ule_bridged = 1; | |
229 | return 0; | |
230 | } | |
231 | ||
232 | ||
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. | |
237 | */ | |
238 | static int handle_one_ule_extension( struct dvb_net_priv *p ) | |
239 | { | |
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, }; | |
243 | ||
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, }; | |
246 | ||
247 | int ext_len = 0; | |
248 | unsigned char hlen = (p->ule_sndu_type & 0x0700) >> 8; | |
249 | unsigned char htype = p->ule_sndu_type & 0x00FF; | |
250 | ||
251 | /* Discriminate mandatory and optional extension headers. */ | |
252 | if (hlen == 0) { | |
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; | |
260 | } else { | |
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. */ | |
263 | } | |
264 | } else | |
265 | ext_len = -1; /* SNDU has to be discarded. */ | |
266 | } else { | |
267 | /* Optional extension header. Calculate the length. */ | |
268 | ext_len = hlen << 2; | |
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; | |
275 | } | |
276 | ||
277 | return ext_len; | |
278 | } | |
279 | ||
280 | static int handle_ule_extensions( struct dvb_net_priv *p ) | |
281 | { | |
282 | int total_ext_len = 0, l; | |
283 | ||
284 | p->ule_next_hdr = p->ule_skb->data; | |
285 | do { | |
286 | l = handle_one_ule_extension( p ); | |
287 | if (l == -1) return -1; /* Stop extension header processing and discard SNDU. */ | |
288 | total_ext_len += l; | |
289 | ||
290 | } while (p->ule_sndu_type < 1536); | |
291 | ||
292 | return total_ext_len; | |
293 | } | |
294 | ||
295 | ||
296 | /** Prepare for a new ULE SNDU: reset the decoder state. */ | |
297 | static inline void reset_ule( struct dvb_net_priv *p ) | |
298 | { | |
299 | p->ule_skb = NULL; | |
300 | p->ule_next_hdr = NULL; | |
301 | p->ule_sndu_len = 0; | |
302 | p->ule_sndu_type = 0; | |
303 | p->ule_sndu_type_1 = 0; | |
304 | p->ule_sndu_remain = 0; | |
305 | p->ule_dbit = 0xFF; | |
306 | p->ule_bridged = 0; | |
307 | } | |
308 | ||
309 | /** | |
310 | * Decode ULE SNDUs according to draft-ietf-ipdvb-ule-03.txt from a sequence of | |
311 | * TS cells of a single PID. | |
312 | */ | |
313 | static void dvb_net_ule( struct net_device *dev, const u8 *buf, size_t buf_len ) | |
314 | { | |
0c53c70f | 315 | struct dvb_net_priv *priv = dev->priv; |
1da177e4 LT |
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; | |
319 | ||
320 | #ifdef ULE_DEBUG | |
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; | |
324 | #endif | |
325 | ||
326 | if (dev == NULL) { | |
327 | printk( KERN_ERR "NO netdev struct!\n" ); | |
328 | return; | |
329 | } | |
330 | ||
331 | /* For all TS cells in current buffer. | |
332 | * Appearently, we are called for every single TS cell. | |
333 | */ | |
334 | for (ts = (char *)buf, ts_end = (char *)buf + buf_len; ts < ts_end; /* no default incr. */ ) { | |
335 | ||
336 | if (new_ts) { | |
337 | /* We are about to process a new TS cell. */ | |
338 | ||
339 | #ifdef ULE_DEBUG | |
340 | if (ule_where >= &ule_hist[100*TS_SZ]) ule_where = ule_hist; | |
341 | memcpy( ule_where, ts, TS_SZ ); | |
342 | if (ule_dump) { | |
343 | hexdump( ule_where, TS_SZ ); | |
344 | ule_dump = 0; | |
345 | } | |
346 | ule_where += TS_SZ; | |
347 | #endif | |
348 | ||
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); | |
353 | ||
354 | /* Drop partly decoded SNDU, reset state, resync on PUSI. */ | |
355 | if (priv->ule_skb) { | |
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++; | |
360 | } | |
361 | reset_ule(priv); | |
362 | priv->need_pusi = 1; | |
363 | ||
364 | /* Continue with next TS cell. */ | |
365 | ts += TS_SZ; | |
366 | priv->ts_count++; | |
367 | continue; | |
368 | } | |
369 | ||
370 | ts_remain = 184; | |
371 | from_where = ts + 4; | |
372 | } | |
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]); | |
383 | ts += TS_SZ; | |
384 | priv->ts_count++; | |
385 | continue; | |
386 | } | |
387 | /* Skip to destination of pointer field. */ | |
388 | from_where = &ts[5] + ts[4]; | |
389 | ts_remain -= 1 + ts[4]; | |
390 | skipped = 0; | |
391 | } else { | |
392 | skipped++; | |
393 | ts += TS_SZ; | |
394 | priv->ts_count++; | |
395 | continue; | |
396 | } | |
397 | } | |
398 | ||
399 | /* Check continuity counter. */ | |
400 | if (new_ts) { | |
401 | if ((ts[3] & 0x0F) == priv->tscc) | |
402 | priv->tscc = (priv->tscc + 1) & 0x0F; | |
403 | else { | |
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. */ | |
408 | if (priv->ule_skb) { | |
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++; | |
414 | } | |
415 | reset_ule(priv); | |
416 | /* skip to next PUSI. */ | |
417 | priv->need_pusi = 1; | |
418 | ts += TS_SZ; | |
419 | priv->ts_count++; | |
420 | continue; | |
421 | } | |
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); | |
432 | ||
433 | /* Drop partly decoded SNDU, reset state, resync on PUSI. */ | |
434 | if (priv->ule_skb) { | |
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++; | |
438 | } | |
439 | reset_ule(priv); | |
440 | priv->need_pusi = 1; | |
441 | ts += TS_SZ; | |
442 | priv->ts_count++; | |
443 | continue; | |
444 | } | |
445 | /* Skip pointer field (we're processing a | |
446 | * packed payload). */ | |
447 | from_where += 1; | |
448 | ts_remain -= 1; | |
449 | } else | |
450 | priv->need_pusi = 0; | |
451 | ||
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. */ | |
462 | reset_ule(priv); | |
463 | /* Resync: go to where pointer field points to: start of next ULE SNDU. */ | |
464 | from_where += ts[4]; | |
465 | ts_remain -= ts[4]; | |
466 | } | |
467 | } | |
468 | } | |
469 | ||
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 | |
475 | * TS. | |
476 | * Check ts_remain has to be >= 2 here. */ | |
477 | if (ts_remain < 2) { | |
478 | printk(KERN_WARNING "Invalid payload packing: only %d " | |
479 | "bytes left in TS. Resyncing.\n", ts_remain); | |
480 | priv->ule_sndu_len = 0; | |
481 | priv->need_pusi = 1; | |
482 | continue; | |
483 | } | |
484 | ||
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; | |
491 | priv->ule_dbit = 1; | |
492 | } else | |
493 | priv->ule_dbit = 0; | |
494 | ||
495 | if (priv->ule_sndu_len > 32763) { | |
496 | printk(KERN_WARNING "%lu: Invalid ULE SNDU length %u. " | |
497 | "Resyncing.\n", priv->ts_count, priv->ule_sndu_len); | |
498 | priv->ule_sndu_len = 0; | |
499 | priv->need_pusi = 1; | |
500 | new_ts = 1; | |
501 | ts += TS_SZ; | |
502 | priv->ts_count++; | |
503 | continue; | |
504 | } | |
505 | ts_remain -= 2; /* consume the 2 bytes SNDU length. */ | |
506 | from_where += 2; | |
507 | } | |
508 | ||
509 | /* | |
510 | * State of current TS: | |
511 | * ts_remain (remaining bytes in the current TS cell) | |
512 | * 0 ule_type is not available now, we need the next TS cell | |
513 | * 1 the first byte of the ule_type is present | |
514 | * >=2 full ULE header present, maybe some payload data as well. | |
515 | */ | |
516 | switch (ts_remain) { | |
517 | case 1: | |
518 | priv->ule_sndu_type = from_where[0] << 8; | |
519 | priv->ule_sndu_type_1 = 1; /* first byte of ule_type is set. */ | |
520 | ts_remain -= 1; from_where += 1; | |
521 | /* Continue w/ next TS. */ | |
522 | case 0: | |
523 | new_ts = 1; | |
524 | ts += TS_SZ; | |
525 | priv->ts_count++; | |
526 | continue; | |
527 | ||
528 | default: /* complete ULE header is present in current TS. */ | |
529 | /* Extract ULE type field. */ | |
530 | if (priv->ule_sndu_type_1) { | |
531 | priv->ule_sndu_type |= from_where[0]; | |
532 | from_where += 1; /* points to payload start. */ | |
533 | ts_remain -= 1; | |
534 | } else { | |
535 | /* Complete type is present in new TS. */ | |
536 | priv->ule_sndu_type = from_where[0] << 8 | from_where[1]; | |
537 | from_where += 2; /* points to payload start. */ | |
538 | ts_remain -= 2; | |
539 | } | |
540 | break; | |
541 | } | |
542 | ||
543 | /* Allocate the skb (decoder target buffer) with the correct size, as follows: | |
544 | * prepare for the largest case: bridged SNDU with MAC address (dbit = 0). */ | |
545 | priv->ule_skb = dev_alloc_skb( priv->ule_sndu_len + ETH_HLEN + ETH_ALEN ); | |
546 | if (priv->ule_skb == NULL) { | |
547 | printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n", | |
548 | dev->name); | |
549 | ((struct dvb_net_priv *)dev->priv)->stats.rx_dropped++; | |
550 | return; | |
551 | } | |
552 | ||
553 | /* This includes the CRC32 _and_ dest mac, if !dbit. */ | |
554 | priv->ule_sndu_remain = priv->ule_sndu_len; | |
555 | priv->ule_skb->dev = dev; | |
556 | /* Leave space for Ethernet or bridged SNDU header (eth hdr plus one MAC addr). */ | |
557 | skb_reserve( priv->ule_skb, ETH_HLEN + ETH_ALEN ); | |
558 | } | |
559 | ||
560 | /* Copy data into our current skb. */ | |
561 | how_much = min(priv->ule_sndu_remain, (int)ts_remain); | |
562 | memcpy(skb_put(priv->ule_skb, how_much), from_where, how_much); | |
563 | priv->ule_sndu_remain -= how_much; | |
564 | ts_remain -= how_much; | |
565 | from_where += how_much; | |
566 | ||
567 | /* Check for complete payload. */ | |
568 | if (priv->ule_sndu_remain <= 0) { | |
569 | /* Check CRC32, we've got it in our skb already. */ | |
570 | unsigned short ulen = htons(priv->ule_sndu_len); | |
571 | unsigned short utype = htons(priv->ule_sndu_type); | |
572 | struct kvec iov[3] = { | |
573 | { &ulen, sizeof ulen }, | |
574 | { &utype, sizeof utype }, | |
575 | { priv->ule_skb->data, priv->ule_skb->len - 4 } | |
576 | }; | |
577 | unsigned long ule_crc = ~0L, expected_crc; | |
578 | if (priv->ule_dbit) { | |
579 | /* Set D-bit for CRC32 verification, | |
580 | * if it was set originally. */ | |
581 | ulen |= 0x0080; | |
582 | } | |
583 | ||
584 | ule_crc = iov_crc32(ule_crc, iov, 3); | |
585 | expected_crc = *((u8 *)priv->ule_skb->tail - 4) << 24 | | |
586 | *((u8 *)priv->ule_skb->tail - 3) << 16 | | |
587 | *((u8 *)priv->ule_skb->tail - 2) << 8 | | |
588 | *((u8 *)priv->ule_skb->tail - 1); | |
589 | if (ule_crc != expected_crc) { | |
590 | printk(KERN_WARNING "%lu: CRC32 check FAILED: %#lx / %#lx, SNDU len %d type %#x, ts_remain %d, next 2: %x.\n", | |
591 | 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); | |
592 | ||
593 | #ifdef ULE_DEBUG | |
594 | hexdump( iov[0].iov_base, iov[0].iov_len ); | |
595 | hexdump( iov[1].iov_base, iov[1].iov_len ); | |
596 | hexdump( iov[2].iov_base, iov[2].iov_len ); | |
597 | ||
598 | if (ule_where == ule_hist) { | |
599 | hexdump( &ule_hist[98*TS_SZ], TS_SZ ); | |
600 | hexdump( &ule_hist[99*TS_SZ], TS_SZ ); | |
601 | } else if (ule_where == &ule_hist[TS_SZ]) { | |
602 | hexdump( &ule_hist[99*TS_SZ], TS_SZ ); | |
603 | hexdump( ule_hist, TS_SZ ); | |
604 | } else { | |
605 | hexdump( ule_where - TS_SZ - TS_SZ, TS_SZ ); | |
606 | hexdump( ule_where - TS_SZ, TS_SZ ); | |
607 | } | |
608 | ule_dump = 1; | |
609 | #endif | |
610 | ||
611 | ((struct dvb_net_priv *) dev->priv)->stats.rx_errors++; | |
612 | ((struct dvb_net_priv *) dev->priv)->stats.rx_crc_errors++; | |
613 | dev_kfree_skb(priv->ule_skb); | |
614 | } else { | |
615 | /* CRC32 verified OK. */ | |
616 | /* Handle ULE Extension Headers. */ | |
617 | if (priv->ule_sndu_type < 1536) { | |
618 | /* There is an extension header. Handle it accordingly. */ | |
619 | int l = handle_ule_extensions( priv ); | |
620 | if (l < 0) { | |
621 | /* Mandatory extension header unknown or TEST SNDU. Drop it. */ | |
622 | // printk( KERN_WARNING "Dropping SNDU, extension headers.\n" ); | |
623 | dev_kfree_skb( priv->ule_skb ); | |
624 | goto sndu_done; | |
625 | } | |
626 | skb_pull( priv->ule_skb, l ); | |
627 | } | |
628 | ||
629 | /* CRC32 was OK. Remove it from skb. */ | |
630 | priv->ule_skb->tail -= 4; | |
631 | priv->ule_skb->len -= 4; | |
632 | ||
633 | /* Filter on receiver's destination MAC address, if present. */ | |
634 | if (!priv->ule_dbit) { | |
635 | /* The destination MAC address is the next data in the skb. */ | |
636 | if (memcmp( priv->ule_skb->data, dev->dev_addr, ETH_ALEN )) { | |
637 | /* MAC addresses don't match. Drop SNDU. */ | |
638 | // printk( KERN_WARNING "Dropping SNDU, MAC address.\n" ); | |
639 | dev_kfree_skb( priv->ule_skb ); | |
640 | goto sndu_done; | |
641 | } | |
642 | if (! priv->ule_bridged) { | |
643 | skb_push( priv->ule_skb, ETH_ALEN + 2 ); | |
644 | ethh = (struct ethhdr *)priv->ule_skb->data; | |
645 | memcpy( ethh->h_dest, ethh->h_source, ETH_ALEN ); | |
646 | memset( ethh->h_source, 0, ETH_ALEN ); | |
647 | ethh->h_proto = htons( priv->ule_sndu_type ); | |
648 | } else { | |
649 | /* Skip the Receiver destination MAC address. */ | |
650 | skb_pull( priv->ule_skb, ETH_ALEN ); | |
651 | } | |
652 | } else { | |
653 | if (! priv->ule_bridged) { | |
654 | skb_push( priv->ule_skb, ETH_HLEN ); | |
655 | ethh = (struct ethhdr *)priv->ule_skb->data; | |
656 | memcpy( ethh->h_dest, dev->dev_addr, ETH_ALEN ); | |
657 | memset( ethh->h_source, 0, ETH_ALEN ); | |
658 | ethh->h_proto = htons( priv->ule_sndu_type ); | |
659 | } else { | |
660 | /* skb is in correct state; nothing to do. */ | |
661 | } | |
662 | } | |
663 | priv->ule_bridged = 0; | |
664 | ||
665 | /* Stuff into kernel's protocol stack. */ | |
666 | priv->ule_skb->protocol = dvb_net_eth_type_trans(priv->ule_skb, dev); | |
667 | /* If D-bit is set (i.e. destination MAC address not present), | |
668 | * receive the packet anyhow. */ | |
669 | /* if (priv->ule_dbit && skb->pkt_type == PACKET_OTHERHOST) | |
670 | priv->ule_skb->pkt_type = PACKET_HOST; */ | |
671 | ((struct dvb_net_priv *) dev->priv)->stats.rx_packets++; | |
672 | ((struct dvb_net_priv *) dev->priv)->stats.rx_bytes += priv->ule_skb->len; | |
673 | netif_rx(priv->ule_skb); | |
674 | } | |
675 | sndu_done: | |
676 | /* Prepare for next SNDU. */ | |
677 | reset_ule(priv); | |
678 | } | |
679 | ||
680 | /* More data in current TS (look at the bytes following the CRC32)? */ | |
681 | if (ts_remain >= 2 && *((unsigned short *)from_where) != 0xFFFF) { | |
682 | /* Next ULE SNDU starts right there. */ | |
683 | new_ts = 0; | |
684 | priv->ule_skb = NULL; | |
685 | priv->ule_sndu_type_1 = 0; | |
686 | priv->ule_sndu_len = 0; | |
687 | // printk(KERN_WARNING "More data in current TS: [%#x %#x %#x %#x]\n", | |
688 | // *(from_where + 0), *(from_where + 1), | |
689 | // *(from_where + 2), *(from_where + 3)); | |
690 | // printk(KERN_WARNING "ts @ %p, stopped @ %p:\n", ts, from_where + 0); | |
691 | // hexdump(ts, 188); | |
692 | } else { | |
693 | new_ts = 1; | |
694 | ts += TS_SZ; | |
695 | priv->ts_count++; | |
696 | if (priv->ule_skb == NULL) { | |
697 | priv->need_pusi = 1; | |
698 | priv->ule_sndu_type_1 = 0; | |
699 | priv->ule_sndu_len = 0; | |
700 | } | |
701 | } | |
702 | } /* for all available TS cells */ | |
703 | } | |
704 | ||
705 | static int dvb_net_ts_callback(const u8 *buffer1, size_t buffer1_len, | |
706 | const u8 *buffer2, size_t buffer2_len, | |
707 | struct dmx_ts_feed *feed, enum dmx_success success) | |
708 | { | |
0c53c70f | 709 | struct net_device *dev = feed->priv; |
1da177e4 LT |
710 | |
711 | if (buffer2 != 0) | |
712 | printk(KERN_WARNING "buffer2 not 0: %p.\n", buffer2); | |
713 | if (buffer1_len > 32768) | |
714 | printk(KERN_WARNING "length > 32k: %zu.\n", buffer1_len); | |
715 | /* printk("TS callback: %u bytes, %u TS cells @ %p.\n", | |
716 | buffer1_len, buffer1_len / TS_SZ, buffer1); */ | |
717 | dvb_net_ule(dev, buffer1, buffer1_len); | |
718 | return 0; | |
719 | } | |
720 | ||
721 | ||
722 | static void dvb_net_sec(struct net_device *dev, u8 *pkt, int pkt_len) | |
723 | { | |
724 | u8 *eth; | |
725 | struct sk_buff *skb; | |
726 | struct net_device_stats *stats = &(((struct dvb_net_priv *) dev->priv)->stats); | |
59142330 | 727 | int snap = 0; |
1da177e4 LT |
728 | |
729 | /* note: pkt_len includes a 32bit checksum */ | |
730 | if (pkt_len < 16) { | |
731 | printk("%s: IP/MPE packet length = %d too small.\n", | |
732 | dev->name, pkt_len); | |
733 | stats->rx_errors++; | |
734 | stats->rx_length_errors++; | |
735 | return; | |
736 | } | |
737 | /* it seems some ISPs manage to screw up here, so we have to | |
738 | * relax the error checks... */ | |
739 | #if 0 | |
740 | if ((pkt[5] & 0xfd) != 0xc1) { | |
741 | /* drop scrambled or broken packets */ | |
742 | #else | |
743 | if ((pkt[5] & 0x3c) != 0x00) { | |
744 | /* drop scrambled */ | |
745 | #endif | |
746 | stats->rx_errors++; | |
747 | stats->rx_crc_errors++; | |
748 | return; | |
749 | } | |
750 | if (pkt[5] & 0x02) { | |
59142330 JS |
751 | /* handle LLC/SNAP, see rfc-1042 */ |
752 | if (pkt_len < 24 || memcmp(&pkt[12], "\xaa\xaa\x03\0\0\0", 6)) { | |
753 | stats->rx_dropped++; | |
754 | return; | |
755 | } | |
756 | snap = 8; | |
1da177e4 LT |
757 | } |
758 | if (pkt[7]) { | |
759 | /* FIXME: assemble datagram from multiple sections */ | |
760 | stats->rx_errors++; | |
761 | stats->rx_frame_errors++; | |
762 | return; | |
763 | } | |
764 | ||
765 | /* we have 14 byte ethernet header (ip header follows); | |
59142330 | 766 | * 12 byte MPE header; 4 byte checksum; + 2 byte alignment, 8 byte LLC/SNAP |
1da177e4 | 767 | */ |
59142330 | 768 | if (!(skb = dev_alloc_skb(pkt_len - 4 - 12 + 14 + 2 - snap))) { |
1da177e4 LT |
769 | //printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n", dev->name); |
770 | stats->rx_dropped++; | |
771 | return; | |
772 | } | |
773 | skb_reserve(skb, 2); /* longword align L3 header */ | |
774 | skb->dev = dev; | |
775 | ||
776 | /* copy L3 payload */ | |
59142330 JS |
777 | eth = (u8 *) skb_put(skb, pkt_len - 12 - 4 + 14 - snap); |
778 | memcpy(eth + 14, pkt + 12 + snap, pkt_len - 12 - 4 - snap); | |
1da177e4 LT |
779 | |
780 | /* create ethernet header: */ | |
781 | eth[0]=pkt[0x0b]; | |
782 | eth[1]=pkt[0x0a]; | |
783 | eth[2]=pkt[0x09]; | |
784 | eth[3]=pkt[0x08]; | |
785 | eth[4]=pkt[0x04]; | |
786 | eth[5]=pkt[0x03]; | |
787 | ||
788 | eth[6]=eth[7]=eth[8]=eth[9]=eth[10]=eth[11]=0; | |
789 | ||
59142330 JS |
790 | if (snap) { |
791 | eth[12] = pkt[18]; | |
792 | eth[13] = pkt[19]; | |
793 | } else { | |
794 | /* protocol numbers are from rfc-1700 or | |
795 | * http://www.iana.org/assignments/ethernet-numbers | |
796 | */ | |
797 | if (pkt[12] >> 4 == 6) { /* version field from IP header */ | |
798 | eth[12] = 0x86; /* IPv6 */ | |
799 | eth[13] = 0xdd; | |
800 | } else { | |
801 | eth[12] = 0x08; /* IPv4 */ | |
802 | eth[13] = 0x00; | |
803 | } | |
804 | } | |
1da177e4 LT |
805 | |
806 | skb->protocol = dvb_net_eth_type_trans(skb, dev); | |
807 | ||
808 | stats->rx_packets++; | |
809 | stats->rx_bytes+=skb->len; | |
810 | netif_rx(skb); | |
811 | } | |
812 | ||
813 | static int dvb_net_sec_callback(const u8 *buffer1, size_t buffer1_len, | |
814 | const u8 *buffer2, size_t buffer2_len, | |
815 | struct dmx_section_filter *filter, | |
816 | enum dmx_success success) | |
817 | { | |
0c53c70f | 818 | struct net_device *dev = filter->priv; |
1da177e4 LT |
819 | |
820 | /** | |
821 | * we rely on the DVB API definition where exactly one complete | |
822 | * section is delivered in buffer1 | |
823 | */ | |
824 | dvb_net_sec (dev, (u8*) buffer1, buffer1_len); | |
825 | return 0; | |
826 | } | |
827 | ||
828 | static int dvb_net_tx(struct sk_buff *skb, struct net_device *dev) | |
829 | { | |
830 | dev_kfree_skb(skb); | |
831 | return 0; | |
832 | } | |
833 | ||
834 | static u8 mask_normal[6]={0xff, 0xff, 0xff, 0xff, 0xff, 0xff}; | |
835 | static u8 mask_allmulti[6]={0xff, 0xff, 0xff, 0x00, 0x00, 0x00}; | |
836 | static u8 mac_allmulti[6]={0x01, 0x00, 0x5e, 0x00, 0x00, 0x00}; | |
837 | static u8 mask_promisc[6]={0x00, 0x00, 0x00, 0x00, 0x00, 0x00}; | |
838 | ||
839 | static int dvb_net_filter_sec_set(struct net_device *dev, | |
840 | struct dmx_section_filter **secfilter, | |
841 | u8 *mac, u8 *mac_mask) | |
842 | { | |
0c53c70f | 843 | struct dvb_net_priv *priv = dev->priv; |
1da177e4 LT |
844 | int ret; |
845 | ||
846 | *secfilter=NULL; | |
847 | ret = priv->secfeed->allocate_filter(priv->secfeed, secfilter); | |
848 | if (ret<0) { | |
849 | printk("%s: could not get filter\n", dev->name); | |
850 | return ret; | |
851 | } | |
852 | ||
853 | (*secfilter)->priv=(void *) dev; | |
854 | ||
855 | memset((*secfilter)->filter_value, 0x00, DMX_MAX_FILTER_SIZE); | |
856 | memset((*secfilter)->filter_mask, 0x00, DMX_MAX_FILTER_SIZE); | |
857 | memset((*secfilter)->filter_mode, 0xff, DMX_MAX_FILTER_SIZE); | |
858 | ||
859 | (*secfilter)->filter_value[0]=0x3e; | |
860 | (*secfilter)->filter_value[3]=mac[5]; | |
861 | (*secfilter)->filter_value[4]=mac[4]; | |
862 | (*secfilter)->filter_value[8]=mac[3]; | |
863 | (*secfilter)->filter_value[9]=mac[2]; | |
864 | (*secfilter)->filter_value[10]=mac[1]; | |
865 | (*secfilter)->filter_value[11]=mac[0]; | |
866 | ||
867 | (*secfilter)->filter_mask[0] = 0xff; | |
868 | (*secfilter)->filter_mask[3] = mac_mask[5]; | |
869 | (*secfilter)->filter_mask[4] = mac_mask[4]; | |
870 | (*secfilter)->filter_mask[8] = mac_mask[3]; | |
871 | (*secfilter)->filter_mask[9] = mac_mask[2]; | |
872 | (*secfilter)->filter_mask[10] = mac_mask[1]; | |
873 | (*secfilter)->filter_mask[11]=mac_mask[0]; | |
874 | ||
875 | dprintk("%s: filter mac=%02x %02x %02x %02x %02x %02x\n", | |
876 | dev->name, mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]); | |
877 | dprintk("%s: filter mask=%02x %02x %02x %02x %02x %02x\n", | |
878 | dev->name, mac_mask[0], mac_mask[1], mac_mask[2], | |
879 | mac_mask[3], mac_mask[4], mac_mask[5]); | |
880 | ||
881 | return 0; | |
882 | } | |
883 | ||
884 | static int dvb_net_feed_start(struct net_device *dev) | |
885 | { | |
1130ca45 | 886 | int ret = 0, i; |
0c53c70f | 887 | struct dvb_net_priv *priv = dev->priv; |
1da177e4 LT |
888 | struct dmx_demux *demux = priv->demux; |
889 | unsigned char *mac = (unsigned char *) dev->dev_addr; | |
890 | ||
891 | dprintk("%s: rx_mode %i\n", __FUNCTION__, priv->rx_mode); | |
1130ca45 | 892 | down(&priv->mutex); |
1da177e4 LT |
893 | if (priv->tsfeed || priv->secfeed || priv->secfilter || priv->multi_secfilter[0]) |
894 | printk("%s: BUG %d\n", __FUNCTION__, __LINE__); | |
895 | ||
896 | priv->secfeed=NULL; | |
897 | priv->secfilter=NULL; | |
898 | priv->tsfeed = NULL; | |
899 | ||
900 | if (priv->feedtype == DVB_NET_FEEDTYPE_MPE) { | |
901 | dprintk("%s: alloc secfeed\n", __FUNCTION__); | |
902 | ret=demux->allocate_section_feed(demux, &priv->secfeed, | |
903 | dvb_net_sec_callback); | |
904 | if (ret<0) { | |
905 | printk("%s: could not allocate section feed\n", dev->name); | |
1130ca45 | 906 | goto error; |
1da177e4 LT |
907 | } |
908 | ||
5d2cd163 | 909 | ret = priv->secfeed->set(priv->secfeed, priv->pid, 32768, 1); |
1da177e4 LT |
910 | |
911 | if (ret<0) { | |
912 | printk("%s: could not set section feed\n", dev->name); | |
913 | priv->demux->release_section_feed(priv->demux, priv->secfeed); | |
914 | priv->secfeed=NULL; | |
1130ca45 | 915 | goto error; |
1da177e4 LT |
916 | } |
917 | ||
918 | if (priv->rx_mode != RX_MODE_PROMISC) { | |
919 | dprintk("%s: set secfilter\n", __FUNCTION__); | |
920 | dvb_net_filter_sec_set(dev, &priv->secfilter, mac, mask_normal); | |
921 | } | |
922 | ||
923 | switch (priv->rx_mode) { | |
924 | case RX_MODE_MULTI: | |
925 | for (i = 0; i < priv->multi_num; i++) { | |
926 | dprintk("%s: set multi_secfilter[%d]\n", __FUNCTION__, i); | |
927 | dvb_net_filter_sec_set(dev, &priv->multi_secfilter[i], | |
928 | priv->multi_macs[i], mask_normal); | |
929 | } | |
930 | break; | |
931 | case RX_MODE_ALL_MULTI: | |
932 | priv->multi_num=1; | |
933 | dprintk("%s: set multi_secfilter[0]\n", __FUNCTION__); | |
934 | dvb_net_filter_sec_set(dev, &priv->multi_secfilter[0], | |
935 | mac_allmulti, mask_allmulti); | |
936 | break; | |
937 | case RX_MODE_PROMISC: | |
938 | priv->multi_num=0; | |
939 | dprintk("%s: set secfilter\n", __FUNCTION__); | |
940 | dvb_net_filter_sec_set(dev, &priv->secfilter, mac, mask_promisc); | |
941 | break; | |
942 | } | |
943 | ||
944 | dprintk("%s: start filtering\n", __FUNCTION__); | |
945 | priv->secfeed->start_filtering(priv->secfeed); | |
946 | } else if (priv->feedtype == DVB_NET_FEEDTYPE_ULE) { | |
947 | struct timespec timeout = { 0, 30000000 }; // 30 msec | |
948 | ||
949 | /* we have payloads encapsulated in TS */ | |
950 | dprintk("%s: alloc tsfeed\n", __FUNCTION__); | |
951 | ret = demux->allocate_ts_feed(demux, &priv->tsfeed, dvb_net_ts_callback); | |
952 | if (ret < 0) { | |
953 | printk("%s: could not allocate ts feed\n", dev->name); | |
1130ca45 | 954 | goto error; |
1da177e4 LT |
955 | } |
956 | ||
957 | /* Set netdevice pointer for ts decaps callback. */ | |
958 | priv->tsfeed->priv = (void *)dev; | |
959 | ret = priv->tsfeed->set(priv->tsfeed, priv->pid, | |
960 | TS_PACKET, DMX_TS_PES_OTHER, | |
1da177e4 | 961 | 32768, /* circular buffer size */ |
1da177e4 LT |
962 | timeout); |
963 | ||
964 | if (ret < 0) { | |
965 | printk("%s: could not set ts feed\n", dev->name); | |
966 | priv->demux->release_ts_feed(priv->demux, priv->tsfeed); | |
967 | priv->tsfeed = NULL; | |
1130ca45 | 968 | goto error; |
1da177e4 LT |
969 | } |
970 | ||
971 | dprintk("%s: start filtering\n", __FUNCTION__); | |
972 | priv->tsfeed->start_filtering(priv->tsfeed); | |
973 | } else | |
1130ca45 | 974 | ret = -EINVAL; |
1da177e4 | 975 | |
1130ca45 RM |
976 | error: |
977 | up(&priv->mutex); | |
978 | return ret; | |
1da177e4 LT |
979 | } |
980 | ||
981 | static int dvb_net_feed_stop(struct net_device *dev) | |
982 | { | |
0c53c70f | 983 | struct dvb_net_priv *priv = dev->priv; |
1130ca45 | 984 | int i, ret = 0; |
1da177e4 LT |
985 | |
986 | dprintk("%s\n", __FUNCTION__); | |
1130ca45 | 987 | down(&priv->mutex); |
1da177e4 LT |
988 | if (priv->feedtype == DVB_NET_FEEDTYPE_MPE) { |
989 | if (priv->secfeed) { | |
990 | if (priv->secfeed->is_filtering) { | |
991 | dprintk("%s: stop secfeed\n", __FUNCTION__); | |
992 | priv->secfeed->stop_filtering(priv->secfeed); | |
993 | } | |
994 | ||
995 | if (priv->secfilter) { | |
996 | dprintk("%s: release secfilter\n", __FUNCTION__); | |
997 | priv->secfeed->release_filter(priv->secfeed, | |
998 | priv->secfilter); | |
999 | priv->secfilter=NULL; | |
1000 | } | |
1001 | ||
1002 | for (i=0; i<priv->multi_num; i++) { | |
1003 | if (priv->multi_secfilter[i]) { | |
1004 | dprintk("%s: release multi_filter[%d]\n", | |
1005 | __FUNCTION__, i); | |
1006 | priv->secfeed->release_filter(priv->secfeed, | |
1007 | priv->multi_secfilter[i]); | |
1008 | priv->multi_secfilter[i] = NULL; | |
1009 | } | |
1010 | } | |
1011 | ||
1012 | priv->demux->release_section_feed(priv->demux, priv->secfeed); | |
1013 | priv->secfeed = NULL; | |
1014 | } else | |
1015 | printk("%s: no feed to stop\n", dev->name); | |
1016 | } else if (priv->feedtype == DVB_NET_FEEDTYPE_ULE) { | |
1017 | if (priv->tsfeed) { | |
1018 | if (priv->tsfeed->is_filtering) { | |
1019 | dprintk("%s: stop tsfeed\n", __FUNCTION__); | |
1020 | priv->tsfeed->stop_filtering(priv->tsfeed); | |
1021 | } | |
1022 | priv->demux->release_ts_feed(priv->demux, priv->tsfeed); | |
1023 | priv->tsfeed = NULL; | |
1024 | } | |
1025 | else | |
1026 | printk("%s: no ts feed to stop\n", dev->name); | |
1027 | } else | |
1130ca45 RM |
1028 | ret = -EINVAL; |
1029 | up(&priv->mutex); | |
1030 | return ret; | |
1da177e4 LT |
1031 | } |
1032 | ||
1033 | ||
1034 | static int dvb_set_mc_filter (struct net_device *dev, struct dev_mc_list *mc) | |
1035 | { | |
0c53c70f | 1036 | struct dvb_net_priv *priv = dev->priv; |
1da177e4 LT |
1037 | |
1038 | if (priv->multi_num == DVB_NET_MULTICAST_MAX) | |
1039 | return -ENOMEM; | |
1040 | ||
1041 | memcpy(priv->multi_macs[priv->multi_num], mc->dmi_addr, 6); | |
1042 | ||
1043 | priv->multi_num++; | |
1044 | return 0; | |
1045 | } | |
1046 | ||
1047 | ||
1048 | static void wq_set_multicast_list (void *data) | |
1049 | { | |
1050 | struct net_device *dev = data; | |
0c53c70f | 1051 | struct dvb_net_priv *priv = dev->priv; |
1da177e4 LT |
1052 | |
1053 | dvb_net_feed_stop(dev); | |
1da177e4 | 1054 | priv->rx_mode = RX_MODE_UNI; |
1130ca45 | 1055 | spin_lock_bh(&dev->xmit_lock); |
1da177e4 LT |
1056 | |
1057 | if (dev->flags & IFF_PROMISC) { | |
1058 | dprintk("%s: promiscuous mode\n", dev->name); | |
1059 | priv->rx_mode = RX_MODE_PROMISC; | |
1060 | } else if ((dev->flags & IFF_ALLMULTI)) { | |
1061 | dprintk("%s: allmulti mode\n", dev->name); | |
1062 | priv->rx_mode = RX_MODE_ALL_MULTI; | |
1063 | } else if (dev->mc_count) { | |
1064 | int mci; | |
1065 | struct dev_mc_list *mc; | |
1066 | ||
1067 | dprintk("%s: set_mc_list, %d entries\n", | |
1068 | dev->name, dev->mc_count); | |
1069 | ||
1070 | priv->rx_mode = RX_MODE_MULTI; | |
1071 | priv->multi_num = 0; | |
1072 | ||
1073 | for (mci = 0, mc=dev->mc_list; | |
1074 | mci < dev->mc_count; | |
1075 | mc = mc->next, mci++) { | |
1076 | dvb_set_mc_filter(dev, mc); | |
1077 | } | |
1078 | } | |
1079 | ||
1130ca45 | 1080 | spin_unlock_bh(&dev->xmit_lock); |
1da177e4 LT |
1081 | dvb_net_feed_start(dev); |
1082 | } | |
1083 | ||
1084 | ||
1085 | static void dvb_net_set_multicast_list (struct net_device *dev) | |
1086 | { | |
0c53c70f | 1087 | struct dvb_net_priv *priv = dev->priv; |
1da177e4 LT |
1088 | schedule_work(&priv->set_multicast_list_wq); |
1089 | } | |
1090 | ||
1091 | ||
1092 | static void wq_restart_net_feed (void *data) | |
1093 | { | |
1094 | struct net_device *dev = data; | |
1095 | ||
1096 | if (netif_running(dev)) { | |
1097 | dvb_net_feed_stop(dev); | |
1098 | dvb_net_feed_start(dev); | |
1099 | } | |
1100 | } | |
1101 | ||
1102 | ||
1103 | static int dvb_net_set_mac (struct net_device *dev, void *p) | |
1104 | { | |
0c53c70f | 1105 | struct dvb_net_priv *priv = dev->priv; |
1da177e4 LT |
1106 | struct sockaddr *addr=p; |
1107 | ||
1108 | memcpy(dev->dev_addr, addr->sa_data, dev->addr_len); | |
1109 | ||
1110 | if (netif_running(dev)) | |
1111 | schedule_work(&priv->restart_net_feed_wq); | |
1112 | ||
1113 | return 0; | |
1114 | } | |
1115 | ||
1116 | ||
1117 | static int dvb_net_open(struct net_device *dev) | |
1118 | { | |
0c53c70f | 1119 | struct dvb_net_priv *priv = dev->priv; |
1da177e4 LT |
1120 | |
1121 | priv->in_use++; | |
1122 | dvb_net_feed_start(dev); | |
1123 | return 0; | |
1124 | } | |
1125 | ||
1126 | ||
1127 | static int dvb_net_stop(struct net_device *dev) | |
1128 | { | |
0c53c70f | 1129 | struct dvb_net_priv *priv = dev->priv; |
1da177e4 LT |
1130 | |
1131 | priv->in_use--; | |
1132 | return dvb_net_feed_stop(dev); | |
1133 | } | |
1134 | ||
1135 | static struct net_device_stats * dvb_net_get_stats(struct net_device *dev) | |
1136 | { | |
1137 | return &((struct dvb_net_priv*) dev->priv)->stats; | |
1138 | } | |
1139 | ||
1140 | static void dvb_net_setup(struct net_device *dev) | |
1141 | { | |
1142 | ether_setup(dev); | |
1143 | ||
1144 | dev->open = dvb_net_open; | |
1145 | dev->stop = dvb_net_stop; | |
1146 | dev->hard_start_xmit = dvb_net_tx; | |
1147 | dev->get_stats = dvb_net_get_stats; | |
1148 | dev->set_multicast_list = dvb_net_set_multicast_list; | |
1149 | dev->set_mac_address = dvb_net_set_mac; | |
1150 | dev->mtu = 4096; | |
1151 | dev->mc_count = 0; | |
1152 | dev->hard_header_cache = NULL; | |
1153 | dev->flags |= IFF_NOARP; | |
1154 | } | |
1155 | ||
1156 | static int get_if(struct dvb_net *dvbnet) | |
1157 | { | |
1158 | int i; | |
1159 | ||
1160 | for (i=0; i<DVB_NET_DEVICES_MAX; i++) | |
1161 | if (!dvbnet->state[i]) | |
1162 | break; | |
1163 | ||
1164 | if (i == DVB_NET_DEVICES_MAX) | |
1165 | return -1; | |
1166 | ||
1167 | dvbnet->state[i]=1; | |
1168 | return i; | |
1169 | } | |
1170 | ||
1171 | static int dvb_net_add_if(struct dvb_net *dvbnet, u16 pid, u8 feedtype) | |
1172 | { | |
1173 | struct net_device *net; | |
1174 | struct dvb_net_priv *priv; | |
1175 | int result; | |
1176 | int if_num; | |
1177 | ||
1178 | if (feedtype != DVB_NET_FEEDTYPE_MPE && feedtype != DVB_NET_FEEDTYPE_ULE) | |
1179 | return -EINVAL; | |
1180 | if ((if_num = get_if(dvbnet)) < 0) | |
1181 | return -EINVAL; | |
1182 | ||
1183 | net = alloc_netdev(sizeof(struct dvb_net_priv), "dvb", dvb_net_setup); | |
1184 | if (!net) | |
1185 | return -ENOMEM; | |
1186 | ||
1187 | if (dvbnet->dvbdev->id) | |
1188 | snprintf(net->name, IFNAMSIZ, "dvb%d%u%d", | |
1189 | dvbnet->dvbdev->adapter->num, dvbnet->dvbdev->id, if_num); | |
1190 | else | |
1191 | /* compatibility fix to keep dvb0_0 format */ | |
1192 | snprintf(net->name, IFNAMSIZ, "dvb%d_%d", | |
1193 | dvbnet->dvbdev->adapter->num, if_num); | |
1194 | ||
1195 | net->addr_len = 6; | |
1196 | memcpy(net->dev_addr, dvbnet->dvbdev->adapter->proposed_mac, 6); | |
1197 | ||
1198 | dvbnet->device[if_num] = net; | |
1199 | ||
1200 | priv = net->priv; | |
1201 | priv->demux = dvbnet->demux; | |
1202 | priv->pid = pid; | |
1203 | priv->rx_mode = RX_MODE_UNI; | |
1204 | priv->need_pusi = 1; | |
1205 | priv->tscc = 0; | |
1206 | priv->feedtype = feedtype; | |
1207 | reset_ule(priv); | |
1208 | ||
1209 | INIT_WORK(&priv->set_multicast_list_wq, wq_set_multicast_list, net); | |
1210 | INIT_WORK(&priv->restart_net_feed_wq, wq_restart_net_feed, net); | |
1130ca45 | 1211 | init_MUTEX(&priv->mutex); |
1da177e4 LT |
1212 | |
1213 | net->base_addr = pid; | |
1214 | ||
1215 | if ((result = register_netdev(net)) < 0) { | |
1216 | dvbnet->device[if_num] = NULL; | |
1217 | free_netdev(net); | |
1218 | return result; | |
1219 | } | |
1220 | printk("dvb_net: created network interface %s\n", net->name); | |
1221 | ||
1222 | return if_num; | |
1223 | } | |
1224 | ||
1225 | static int dvb_net_remove_if(struct dvb_net *dvbnet, unsigned int num) | |
1226 | { | |
1227 | struct net_device *net = dvbnet->device[num]; | |
1228 | struct dvb_net_priv *priv; | |
1229 | ||
1230 | if (!dvbnet->state[num]) | |
1231 | return -EINVAL; | |
1232 | priv = net->priv; | |
1233 | if (priv->in_use) | |
1234 | return -EBUSY; | |
1235 | ||
1236 | dvb_net_stop(net); | |
1237 | flush_scheduled_work(); | |
1238 | printk("dvb_net: removed network interface %s\n", net->name); | |
1239 | unregister_netdev(net); | |
1240 | dvbnet->state[num]=0; | |
1241 | dvbnet->device[num] = NULL; | |
1242 | free_netdev(net); | |
1243 | ||
1244 | return 0; | |
1245 | } | |
1246 | ||
1247 | static int dvb_net_do_ioctl(struct inode *inode, struct file *file, | |
1248 | unsigned int cmd, void *parg) | |
1249 | { | |
0c53c70f JS |
1250 | struct dvb_device *dvbdev = file->private_data; |
1251 | struct dvb_net *dvbnet = dvbdev->priv; | |
1da177e4 LT |
1252 | |
1253 | if (((file->f_flags&O_ACCMODE)==O_RDONLY)) | |
1254 | return -EPERM; | |
1255 | ||
1256 | switch (cmd) { | |
1257 | case NET_ADD_IF: | |
1258 | { | |
0c53c70f | 1259 | struct dvb_net_if *dvbnetif = parg; |
1da177e4 LT |
1260 | int result; |
1261 | ||
1262 | if (!capable(CAP_SYS_ADMIN)) | |
1263 | return -EPERM; | |
1264 | ||
1265 | if (!try_module_get(dvbdev->adapter->module)) | |
1266 | return -EPERM; | |
1267 | ||
1268 | result=dvb_net_add_if(dvbnet, dvbnetif->pid, dvbnetif->feedtype); | |
1269 | if (result<0) { | |
1270 | module_put(dvbdev->adapter->module); | |
1271 | return result; | |
1272 | } | |
1273 | dvbnetif->if_num=result; | |
1274 | break; | |
1275 | } | |
1276 | case NET_GET_IF: | |
1277 | { | |
1278 | struct net_device *netdev; | |
1279 | struct dvb_net_priv *priv_data; | |
0c53c70f | 1280 | struct dvb_net_if *dvbnetif = parg; |
1da177e4 LT |
1281 | |
1282 | if (dvbnetif->if_num >= DVB_NET_DEVICES_MAX || | |
1283 | !dvbnet->state[dvbnetif->if_num]) | |
1284 | return -EINVAL; | |
1285 | ||
1286 | netdev = dvbnet->device[dvbnetif->if_num]; | |
1287 | ||
0c53c70f | 1288 | priv_data = netdev->priv; |
1da177e4 LT |
1289 | dvbnetif->pid=priv_data->pid; |
1290 | dvbnetif->feedtype=priv_data->feedtype; | |
1291 | break; | |
1292 | } | |
1293 | case NET_REMOVE_IF: | |
1294 | { | |
1295 | int ret; | |
1296 | ||
1297 | if (!capable(CAP_SYS_ADMIN)) | |
1298 | return -EPERM; | |
1299 | if ((unsigned int) parg >= DVB_NET_DEVICES_MAX) | |
1300 | return -EINVAL; | |
1301 | ret = dvb_net_remove_if(dvbnet, (unsigned int) parg); | |
1302 | if (!ret) | |
1303 | module_put(dvbdev->adapter->module); | |
1304 | return ret; | |
1305 | } | |
1306 | ||
1307 | /* binary compatiblity cruft */ | |
1308 | case __NET_ADD_IF_OLD: | |
1309 | { | |
0c53c70f | 1310 | struct __dvb_net_if_old *dvbnetif = parg; |
1da177e4 LT |
1311 | int result; |
1312 | ||
1313 | if (!capable(CAP_SYS_ADMIN)) | |
1314 | return -EPERM; | |
1315 | ||
1316 | if (!try_module_get(dvbdev->adapter->module)) | |
1317 | return -EPERM; | |
1318 | ||
1319 | result=dvb_net_add_if(dvbnet, dvbnetif->pid, DVB_NET_FEEDTYPE_MPE); | |
1320 | if (result<0) { | |
1321 | module_put(dvbdev->adapter->module); | |
1322 | return result; | |
1323 | } | |
1324 | dvbnetif->if_num=result; | |
1325 | break; | |
1326 | } | |
1327 | case __NET_GET_IF_OLD: | |
1328 | { | |
1329 | struct net_device *netdev; | |
1330 | struct dvb_net_priv *priv_data; | |
0c53c70f | 1331 | struct __dvb_net_if_old *dvbnetif = parg; |
1da177e4 LT |
1332 | |
1333 | if (dvbnetif->if_num >= DVB_NET_DEVICES_MAX || | |
1334 | !dvbnet->state[dvbnetif->if_num]) | |
1335 | return -EINVAL; | |
1336 | ||
1337 | netdev = dvbnet->device[dvbnetif->if_num]; | |
1338 | ||
0c53c70f | 1339 | priv_data = netdev->priv; |
1da177e4 LT |
1340 | dvbnetif->pid=priv_data->pid; |
1341 | break; | |
1342 | } | |
1343 | default: | |
1344 | return -ENOTTY; | |
1345 | } | |
1346 | return 0; | |
1347 | } | |
1348 | ||
1349 | static int dvb_net_ioctl(struct inode *inode, struct file *file, | |
1350 | unsigned int cmd, unsigned long arg) | |
1351 | { | |
1352 | return dvb_usercopy(inode, file, cmd, arg, dvb_net_do_ioctl); | |
1353 | } | |
1354 | ||
1355 | static struct file_operations dvb_net_fops = { | |
1356 | .owner = THIS_MODULE, | |
1357 | .ioctl = dvb_net_ioctl, | |
1358 | .open = dvb_generic_open, | |
1359 | .release = dvb_generic_release, | |
1360 | }; | |
1361 | ||
1362 | static struct dvb_device dvbdev_net = { | |
1363 | .priv = NULL, | |
1364 | .users = 1, | |
1365 | .writers = 1, | |
1366 | .fops = &dvb_net_fops, | |
1367 | }; | |
1368 | ||
1369 | ||
1370 | void dvb_net_release (struct dvb_net *dvbnet) | |
1371 | { | |
1372 | int i; | |
1373 | ||
1374 | dvb_unregister_device(dvbnet->dvbdev); | |
1375 | ||
1376 | for (i=0; i<DVB_NET_DEVICES_MAX; i++) { | |
1377 | if (!dvbnet->state[i]) | |
1378 | continue; | |
1379 | dvb_net_remove_if(dvbnet, i); | |
1380 | } | |
1381 | } | |
1382 | EXPORT_SYMBOL(dvb_net_release); | |
1383 | ||
1384 | ||
1385 | int dvb_net_init (struct dvb_adapter *adap, struct dvb_net *dvbnet, | |
1386 | struct dmx_demux *dmx) | |
1387 | { | |
1388 | int i; | |
1389 | ||
1390 | dvbnet->demux = dmx; | |
1391 | ||
1392 | for (i=0; i<DVB_NET_DEVICES_MAX; i++) | |
1393 | dvbnet->state[i] = 0; | |
1394 | ||
1395 | dvb_register_device (adap, &dvbnet->dvbdev, &dvbdev_net, | |
1396 | dvbnet, DVB_DEVICE_NET); | |
1397 | ||
1398 | return 0; | |
1399 | } | |
1400 | EXPORT_SYMBOL(dvb_net_init); |