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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 | * | |
18232ca6 | 15 | * ULE Decaps according to RFC 4326. |
1da177e4 LT |
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. | |
18232ca6 CP |
45 | * Apr 2006: cp v3: Bugfixes and compliency with RFC 4326 (ULE) by |
46 | * Christian Praehauser <cpraehaus@cosy.sbg.ac.at>, | |
47 | * Paris Lodron University of Salzburg. | |
1da177e4 LT |
48 | */ |
49 | ||
50 | /* | |
51 | * FIXME / TODO (dvb_net.c): | |
52 | * | |
53 | * Unloading does not work for 2.6.9 kernels: a refcount doesn't go to zero. | |
54 | * | |
1da177e4 LT |
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> | |
3593cab5 | 65 | #include <linux/mutex.h> |
1da177e4 LT |
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 | ||
18232ca6 CP |
92 | #define MAC_ADDR_PRINTFMT "%.2x:%.2x:%.2x:%.2x:%.2x:%.2x" |
93 | #define MAX_ADDR_PRINTFMT_ARGS(macap) (macap)[0],(macap)[1],(macap)[2],(macap)[3],(macap)[4],(macap)[5] | |
94 | ||
1da177e4 LT |
95 | #define isprint(c) ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || (c >= '0' && c <= '9')) |
96 | ||
97 | static void hexdump( const unsigned char *buf, unsigned short len ) | |
98 | { | |
99 | char str[80], octet[10]; | |
100 | int ofs, i, l; | |
101 | ||
102 | for (ofs = 0; ofs < len; ofs += 16) { | |
103 | sprintf( str, "%03d: ", ofs ); | |
104 | ||
105 | for (i = 0; i < 16; i++) { | |
106 | if ((i + ofs) < len) | |
107 | sprintf( octet, "%02x ", buf[ofs + i] ); | |
108 | else | |
109 | strcpy( octet, " " ); | |
110 | ||
111 | strcat( str, octet ); | |
112 | } | |
113 | strcat( str, " " ); | |
114 | l = strlen( str ); | |
115 | ||
116 | for (i = 0; (i < 16) && ((i + ofs) < len); i++) | |
117 | str[l++] = isprint( buf[ofs + i] ) ? buf[ofs + i] : '.'; | |
118 | ||
119 | str[l] = '\0'; | |
120 | printk( KERN_WARNING "%s\n", str ); | |
121 | } | |
122 | } | |
123 | ||
124 | #endif | |
125 | ||
126 | struct dvb_net_priv { | |
127 | int in_use; | |
128 | struct net_device_stats stats; | |
129 | u16 pid; | |
130 | struct dvb_net *host; | |
131 | struct dmx_demux *demux; | |
132 | struct dmx_section_feed *secfeed; | |
133 | struct dmx_section_filter *secfilter; | |
134 | struct dmx_ts_feed *tsfeed; | |
135 | int multi_num; | |
136 | struct dmx_section_filter *multi_secfilter[DVB_NET_MULTICAST_MAX]; | |
137 | unsigned char multi_macs[DVB_NET_MULTICAST_MAX][6]; | |
138 | int rx_mode; | |
139 | #define RX_MODE_UNI 0 | |
140 | #define RX_MODE_MULTI 1 | |
141 | #define RX_MODE_ALL_MULTI 2 | |
142 | #define RX_MODE_PROMISC 3 | |
143 | struct work_struct set_multicast_list_wq; | |
144 | struct work_struct restart_net_feed_wq; | |
145 | unsigned char feedtype; /* Either FEED_TYPE_ or FEED_TYPE_ULE */ | |
146 | int need_pusi; /* Set to 1, if synchronization on PUSI required. */ | |
147 | unsigned char tscc; /* TS continuity counter after sync on PUSI. */ | |
148 | struct sk_buff *ule_skb; /* ULE SNDU decodes into this buffer. */ | |
149 | unsigned char *ule_next_hdr; /* Pointer into skb to next ULE extension header. */ | |
150 | unsigned short ule_sndu_len; /* ULE SNDU length in bytes, w/o D-Bit. */ | |
151 | unsigned short ule_sndu_type; /* ULE SNDU type field, complete. */ | |
152 | unsigned char ule_sndu_type_1; /* ULE SNDU type field, if split across 2 TS cells. */ | |
153 | unsigned char ule_dbit; /* Whether the DestMAC address present | |
154 | * or not (bit is set). */ | |
155 | unsigned char ule_bridged; /* Whether the ULE_BRIDGED extension header was found. */ | |
156 | int ule_sndu_remain; /* Nr. of bytes still required for current ULE SNDU. */ | |
157 | unsigned long ts_count; /* Current ts cell counter. */ | |
3593cab5 | 158 | struct mutex mutex; |
1da177e4 LT |
159 | }; |
160 | ||
161 | ||
162 | /** | |
163 | * Determine the packet's protocol ID. The rule here is that we | |
164 | * assume 802.3 if the type field is short enough to be a length. | |
165 | * This is normal practice and works for any 'now in use' protocol. | |
166 | * | |
167 | * stolen from eth.c out of the linux kernel, hacked for dvb-device | |
168 | * by Michael Holzt <kju@debian.org> | |
169 | */ | |
170 | static unsigned short dvb_net_eth_type_trans(struct sk_buff *skb, | |
171 | struct net_device *dev) | |
172 | { | |
173 | struct ethhdr *eth; | |
174 | unsigned char *rawp; | |
175 | ||
176 | skb->mac.raw=skb->data; | |
177 | skb_pull(skb,dev->hard_header_len); | |
1da177e4 | 178 | eth = eth_hdr(skb); |
1da177e4 LT |
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 | ||
18232ca6 CP |
220 | #define ULE_OPTEXTHDR_PADDING 0 |
221 | ||
1da177e4 LT |
222 | static int ule_test_sndu( struct dvb_net_priv *p ) |
223 | { | |
224 | return -1; | |
225 | } | |
226 | ||
227 | static int ule_bridged_sndu( struct dvb_net_priv *p ) | |
228 | { | |
18232ca6 CP |
229 | struct ethhdr *hdr = (struct ethhdr*) p->ule_next_hdr; |
230 | if(ntohs(hdr->h_proto) < 1536) { | |
231 | int framelen = p->ule_sndu_len - ((p->ule_next_hdr+sizeof(struct ethhdr)) - p->ule_skb->data); | |
232 | /* A frame Type < 1536 for a bridged frame, introduces a LLC Length field. */ | |
233 | if(framelen != ntohs(hdr->h_proto)) { | |
234 | return -1; | |
235 | } | |
236 | } | |
237 | /* Note: | |
238 | * From RFC4326: | |
239 | * "A bridged SNDU is a Mandatory Extension Header of Type 1. | |
240 | * It must be the final (or only) extension header specified in the header chain of a SNDU." | |
241 | * The 'ule_bridged' flag will cause the extension header processing loop to terminate. | |
1da177e4 LT |
242 | */ |
243 | p->ule_bridged = 1; | |
244 | return 0; | |
245 | } | |
246 | ||
18232ca6 CP |
247 | static int ule_exthdr_padding(struct dvb_net_priv *p) |
248 | { | |
249 | return 0; | |
250 | } | |
1da177e4 LT |
251 | |
252 | /** Handle ULE extension headers. | |
253 | * Function is called after a successful CRC32 verification of an ULE SNDU to complete its decoding. | |
254 | * Returns: >= 0: nr. of bytes consumed by next extension header | |
255 | * -1: Mandatory extension header that is not recognized or TEST SNDU; discard. | |
256 | */ | |
257 | static int handle_one_ule_extension( struct dvb_net_priv *p ) | |
258 | { | |
259 | /* Table of mandatory extension header handlers. The header type is the index. */ | |
260 | static int (*ule_mandatory_ext_handlers[255])( struct dvb_net_priv *p ) = | |
261 | { [0] = ule_test_sndu, [1] = ule_bridged_sndu, [2] = NULL, }; | |
262 | ||
263 | /* Table of optional extension header handlers. The header type is the index. */ | |
18232ca6 CP |
264 | static int (*ule_optional_ext_handlers[255])( struct dvb_net_priv *p ) = |
265 | { [0] = ule_exthdr_padding, [1] = NULL, }; | |
1da177e4 LT |
266 | |
267 | int ext_len = 0; | |
268 | unsigned char hlen = (p->ule_sndu_type & 0x0700) >> 8; | |
269 | unsigned char htype = p->ule_sndu_type & 0x00FF; | |
270 | ||
271 | /* Discriminate mandatory and optional extension headers. */ | |
272 | if (hlen == 0) { | |
273 | /* Mandatory extension header */ | |
274 | if (ule_mandatory_ext_handlers[htype]) { | |
275 | ext_len = ule_mandatory_ext_handlers[htype]( p ); | |
18232ca6 CP |
276 | if(ext_len >= 0) { |
277 | p->ule_next_hdr += ext_len; | |
278 | if (!p->ule_bridged) { | |
279 | p->ule_sndu_type = ntohs(*(unsigned short *)p->ule_next_hdr); | |
280 | p->ule_next_hdr += 2; | |
281 | } else { | |
282 | p->ule_sndu_type = ntohs(*(unsigned short *)(p->ule_next_hdr + ((p->ule_dbit ? 2 : 3) * ETH_ALEN))); | |
283 | /* This assures the extension handling loop will terminate. */ | |
284 | } | |
1da177e4 | 285 | } |
18232ca6 | 286 | // else: extension handler failed or SNDU should be discarded |
1da177e4 LT |
287 | } else |
288 | ext_len = -1; /* SNDU has to be discarded. */ | |
289 | } else { | |
290 | /* Optional extension header. Calculate the length. */ | |
18232ca6 | 291 | ext_len = hlen << 1; |
1da177e4 LT |
292 | /* Process the optional extension header according to its type. */ |
293 | if (ule_optional_ext_handlers[htype]) | |
294 | (void)ule_optional_ext_handlers[htype]( p ); | |
295 | p->ule_next_hdr += ext_len; | |
18232ca6 CP |
296 | p->ule_sndu_type = ntohs( *(unsigned short *)(p->ule_next_hdr-2) ); |
297 | /* | |
298 | * note: the length of the next header type is included in the | |
299 | * length of THIS optional extension header | |
300 | */ | |
1da177e4 LT |
301 | } |
302 | ||
303 | return ext_len; | |
304 | } | |
305 | ||
306 | static int handle_ule_extensions( struct dvb_net_priv *p ) | |
307 | { | |
308 | int total_ext_len = 0, l; | |
309 | ||
310 | p->ule_next_hdr = p->ule_skb->data; | |
311 | do { | |
312 | l = handle_one_ule_extension( p ); | |
18232ca6 CP |
313 | if (l < 0) |
314 | return l; /* Stop extension header processing and discard SNDU. */ | |
1da177e4 | 315 | total_ext_len += l; |
18232ca6 CP |
316 | #ifdef ULE_DEBUG |
317 | dprintk("handle_ule_extensions: ule_next_hdr=%p, ule_sndu_type=%i, " | |
318 | "l=%i, total_ext_len=%i\n", p->ule_next_hdr, | |
319 | (int) p->ule_sndu_type, l, total_ext_len); | |
320 | #endif | |
1da177e4 LT |
321 | |
322 | } while (p->ule_sndu_type < 1536); | |
323 | ||
324 | return total_ext_len; | |
325 | } | |
326 | ||
327 | ||
328 | /** Prepare for a new ULE SNDU: reset the decoder state. */ | |
329 | static inline void reset_ule( struct dvb_net_priv *p ) | |
330 | { | |
331 | p->ule_skb = NULL; | |
332 | p->ule_next_hdr = NULL; | |
333 | p->ule_sndu_len = 0; | |
334 | p->ule_sndu_type = 0; | |
335 | p->ule_sndu_type_1 = 0; | |
336 | p->ule_sndu_remain = 0; | |
337 | p->ule_dbit = 0xFF; | |
338 | p->ule_bridged = 0; | |
339 | } | |
340 | ||
341 | /** | |
342 | * Decode ULE SNDUs according to draft-ietf-ipdvb-ule-03.txt from a sequence of | |
343 | * TS cells of a single PID. | |
344 | */ | |
345 | static void dvb_net_ule( struct net_device *dev, const u8 *buf, size_t buf_len ) | |
346 | { | |
0c53c70f | 347 | struct dvb_net_priv *priv = dev->priv; |
1da177e4 LT |
348 | unsigned long skipped = 0L; |
349 | u8 *ts, *ts_end, *from_where = NULL, ts_remain = 0, how_much = 0, new_ts = 1; | |
350 | struct ethhdr *ethh = NULL; | |
351 | ||
352 | #ifdef ULE_DEBUG | |
353 | /* The code inside ULE_DEBUG keeps a history of the last 100 TS cells processed. */ | |
354 | static unsigned char ule_hist[100*TS_SZ]; | |
355 | static unsigned char *ule_where = ule_hist, ule_dump = 0; | |
356 | #endif | |
357 | ||
358 | if (dev == NULL) { | |
359 | printk( KERN_ERR "NO netdev struct!\n" ); | |
360 | return; | |
361 | } | |
362 | ||
363 | /* For all TS cells in current buffer. | |
364 | * Appearently, we are called for every single TS cell. | |
365 | */ | |
366 | for (ts = (char *)buf, ts_end = (char *)buf + buf_len; ts < ts_end; /* no default incr. */ ) { | |
367 | ||
368 | if (new_ts) { | |
369 | /* We are about to process a new TS cell. */ | |
370 | ||
371 | #ifdef ULE_DEBUG | |
372 | if (ule_where >= &ule_hist[100*TS_SZ]) ule_where = ule_hist; | |
373 | memcpy( ule_where, ts, TS_SZ ); | |
374 | if (ule_dump) { | |
375 | hexdump( ule_where, TS_SZ ); | |
376 | ule_dump = 0; | |
377 | } | |
378 | ule_where += TS_SZ; | |
379 | #endif | |
380 | ||
381 | /* Check TS error conditions: sync_byte, transport_error_indicator, scrambling_control . */ | |
382 | if ((ts[0] != TS_SYNC) || (ts[1] & TS_TEI) || ((ts[3] & TS_SC) != 0)) { | |
383 | printk(KERN_WARNING "%lu: Invalid TS cell: SYNC %#x, TEI %u, SC %#x.\n", | |
384 | priv->ts_count, ts[0], ts[1] & TS_TEI >> 7, ts[3] & 0xC0 >> 6); | |
385 | ||
386 | /* Drop partly decoded SNDU, reset state, resync on PUSI. */ | |
387 | if (priv->ule_skb) { | |
388 | dev_kfree_skb( priv->ule_skb ); | |
389 | /* Prepare for next SNDU. */ | |
18232ca6 CP |
390 | priv->stats.rx_errors++; |
391 | priv->stats.rx_frame_errors++; | |
1da177e4 LT |
392 | } |
393 | reset_ule(priv); | |
394 | priv->need_pusi = 1; | |
395 | ||
396 | /* Continue with next TS cell. */ | |
397 | ts += TS_SZ; | |
398 | priv->ts_count++; | |
399 | continue; | |
400 | } | |
401 | ||
402 | ts_remain = 184; | |
403 | from_where = ts + 4; | |
404 | } | |
405 | /* Synchronize on PUSI, if required. */ | |
406 | if (priv->need_pusi) { | |
407 | if (ts[1] & TS_PUSI) { | |
408 | /* Find beginning of first ULE SNDU in current TS cell. */ | |
409 | /* Synchronize continuity counter. */ | |
410 | priv->tscc = ts[3] & 0x0F; | |
411 | /* There is a pointer field here. */ | |
412 | if (ts[4] > ts_remain) { | |
413 | printk(KERN_ERR "%lu: Invalid ULE packet " | |
414 | "(pointer field %d)\n", priv->ts_count, ts[4]); | |
415 | ts += TS_SZ; | |
416 | priv->ts_count++; | |
417 | continue; | |
418 | } | |
419 | /* Skip to destination of pointer field. */ | |
420 | from_where = &ts[5] + ts[4]; | |
421 | ts_remain -= 1 + ts[4]; | |
422 | skipped = 0; | |
423 | } else { | |
424 | skipped++; | |
425 | ts += TS_SZ; | |
426 | priv->ts_count++; | |
427 | continue; | |
428 | } | |
429 | } | |
430 | ||
1da177e4 | 431 | if (new_ts) { |
18232ca6 | 432 | /* Check continuity counter. */ |
1da177e4 LT |
433 | if ((ts[3] & 0x0F) == priv->tscc) |
434 | priv->tscc = (priv->tscc + 1) & 0x0F; | |
435 | else { | |
436 | /* TS discontinuity handling: */ | |
437 | printk(KERN_WARNING "%lu: TS discontinuity: got %#x, " | |
18232ca6 | 438 | "expected %#x.\n", priv->ts_count, ts[3] & 0x0F, priv->tscc); |
1da177e4 LT |
439 | /* Drop partly decoded SNDU, reset state, resync on PUSI. */ |
440 | if (priv->ule_skb) { | |
441 | dev_kfree_skb( priv->ule_skb ); | |
442 | /* Prepare for next SNDU. */ | |
443 | // reset_ule(priv); moved to below. | |
18232ca6 CP |
444 | priv->stats.rx_errors++; |
445 | priv->stats.rx_frame_errors++; | |
1da177e4 LT |
446 | } |
447 | reset_ule(priv); | |
448 | /* skip to next PUSI. */ | |
449 | priv->need_pusi = 1; | |
1da177e4 LT |
450 | continue; |
451 | } | |
452 | /* If we still have an incomplete payload, but PUSI is | |
453 | * set; some TS cells are missing. | |
454 | * This is only possible here, if we missed exactly 16 TS | |
455 | * cells (continuity counter wrap). */ | |
456 | if (ts[1] & TS_PUSI) { | |
457 | if (! priv->need_pusi) { | |
18232ca6 | 458 | if (!(*from_where < (ts_remain-1)) || *from_where != priv->ule_sndu_remain) { |
1da177e4 LT |
459 | /* Pointer field is invalid. Drop this TS cell and any started ULE SNDU. */ |
460 | printk(KERN_WARNING "%lu: Invalid pointer " | |
461 | "field: %u.\n", priv->ts_count, *from_where); | |
462 | ||
463 | /* Drop partly decoded SNDU, reset state, resync on PUSI. */ | |
464 | if (priv->ule_skb) { | |
465 | dev_kfree_skb( priv->ule_skb ); | |
466 | ((struct dvb_net_priv *) dev->priv)->stats.rx_errors++; | |
467 | ((struct dvb_net_priv *) dev->priv)->stats.rx_frame_errors++; | |
468 | } | |
469 | reset_ule(priv); | |
470 | priv->need_pusi = 1; | |
1da177e4 LT |
471 | continue; |
472 | } | |
473 | /* Skip pointer field (we're processing a | |
474 | * packed payload). */ | |
475 | from_where += 1; | |
476 | ts_remain -= 1; | |
477 | } else | |
478 | priv->need_pusi = 0; | |
479 | ||
480 | if (priv->ule_sndu_remain > 183) { | |
481 | /* Current SNDU lacks more data than there could be available in the | |
482 | * current TS cell. */ | |
18232ca6 CP |
483 | priv->stats.rx_errors++; |
484 | priv->stats.rx_length_errors++; | |
1da177e4 LT |
485 | printk(KERN_WARNING "%lu: Expected %d more SNDU bytes, but " |
486 | "got PUSI (pf %d, ts_remain %d). Flushing incomplete payload.\n", | |
487 | priv->ts_count, priv->ule_sndu_remain, ts[4], ts_remain); | |
488 | dev_kfree_skb(priv->ule_skb); | |
489 | /* Prepare for next SNDU. */ | |
490 | reset_ule(priv); | |
491 | /* Resync: go to where pointer field points to: start of next ULE SNDU. */ | |
492 | from_where += ts[4]; | |
493 | ts_remain -= ts[4]; | |
494 | } | |
495 | } | |
496 | } | |
497 | ||
498 | /* Check if new payload needs to be started. */ | |
499 | if (priv->ule_skb == NULL) { | |
500 | /* Start a new payload with skb. | |
501 | * Find ULE header. It is only guaranteed that the | |
502 | * length field (2 bytes) is contained in the current | |
503 | * TS. | |
504 | * Check ts_remain has to be >= 2 here. */ | |
505 | if (ts_remain < 2) { | |
506 | printk(KERN_WARNING "Invalid payload packing: only %d " | |
507 | "bytes left in TS. Resyncing.\n", ts_remain); | |
508 | priv->ule_sndu_len = 0; | |
509 | priv->need_pusi = 1; | |
510 | continue; | |
511 | } | |
512 | ||
513 | if (! priv->ule_sndu_len) { | |
514 | /* Got at least two bytes, thus extrace the SNDU length. */ | |
515 | priv->ule_sndu_len = from_where[0] << 8 | from_where[1]; | |
516 | if (priv->ule_sndu_len & 0x8000) { | |
517 | /* D-Bit is set: no dest mac present. */ | |
518 | priv->ule_sndu_len &= 0x7FFF; | |
519 | priv->ule_dbit = 1; | |
520 | } else | |
521 | priv->ule_dbit = 0; | |
522 | ||
18232ca6 | 523 | if (priv->ule_sndu_len < 5) { |
1da177e4 LT |
524 | printk(KERN_WARNING "%lu: Invalid ULE SNDU length %u. " |
525 | "Resyncing.\n", priv->ts_count, priv->ule_sndu_len); | |
18232ca6 CP |
526 | priv->stats.rx_errors++; |
527 | priv->stats.rx_length_errors++; | |
1da177e4 LT |
528 | priv->ule_sndu_len = 0; |
529 | priv->need_pusi = 1; | |
530 | new_ts = 1; | |
531 | ts += TS_SZ; | |
532 | priv->ts_count++; | |
533 | continue; | |
534 | } | |
535 | ts_remain -= 2; /* consume the 2 bytes SNDU length. */ | |
536 | from_where += 2; | |
537 | } | |
538 | ||
539 | /* | |
540 | * State of current TS: | |
541 | * ts_remain (remaining bytes in the current TS cell) | |
542 | * 0 ule_type is not available now, we need the next TS cell | |
543 | * 1 the first byte of the ule_type is present | |
544 | * >=2 full ULE header present, maybe some payload data as well. | |
545 | */ | |
546 | switch (ts_remain) { | |
547 | case 1: | |
548 | priv->ule_sndu_type = from_where[0] << 8; | |
549 | priv->ule_sndu_type_1 = 1; /* first byte of ule_type is set. */ | |
550 | ts_remain -= 1; from_where += 1; | |
551 | /* Continue w/ next TS. */ | |
552 | case 0: | |
553 | new_ts = 1; | |
554 | ts += TS_SZ; | |
555 | priv->ts_count++; | |
556 | continue; | |
557 | ||
558 | default: /* complete ULE header is present in current TS. */ | |
559 | /* Extract ULE type field. */ | |
560 | if (priv->ule_sndu_type_1) { | |
561 | priv->ule_sndu_type |= from_where[0]; | |
562 | from_where += 1; /* points to payload start. */ | |
563 | ts_remain -= 1; | |
564 | } else { | |
565 | /* Complete type is present in new TS. */ | |
566 | priv->ule_sndu_type = from_where[0] << 8 | from_where[1]; | |
567 | from_where += 2; /* points to payload start. */ | |
568 | ts_remain -= 2; | |
569 | } | |
570 | break; | |
571 | } | |
572 | ||
573 | /* Allocate the skb (decoder target buffer) with the correct size, as follows: | |
574 | * prepare for the largest case: bridged SNDU with MAC address (dbit = 0). */ | |
575 | priv->ule_skb = dev_alloc_skb( priv->ule_sndu_len + ETH_HLEN + ETH_ALEN ); | |
576 | if (priv->ule_skb == NULL) { | |
577 | printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n", | |
578 | dev->name); | |
579 | ((struct dvb_net_priv *)dev->priv)->stats.rx_dropped++; | |
580 | return; | |
581 | } | |
582 | ||
583 | /* This includes the CRC32 _and_ dest mac, if !dbit. */ | |
584 | priv->ule_sndu_remain = priv->ule_sndu_len; | |
585 | priv->ule_skb->dev = dev; | |
586 | /* Leave space for Ethernet or bridged SNDU header (eth hdr plus one MAC addr). */ | |
587 | skb_reserve( priv->ule_skb, ETH_HLEN + ETH_ALEN ); | |
588 | } | |
589 | ||
590 | /* Copy data into our current skb. */ | |
591 | how_much = min(priv->ule_sndu_remain, (int)ts_remain); | |
592 | memcpy(skb_put(priv->ule_skb, how_much), from_where, how_much); | |
593 | priv->ule_sndu_remain -= how_much; | |
594 | ts_remain -= how_much; | |
595 | from_where += how_much; | |
596 | ||
597 | /* Check for complete payload. */ | |
598 | if (priv->ule_sndu_remain <= 0) { | |
599 | /* Check CRC32, we've got it in our skb already. */ | |
600 | unsigned short ulen = htons(priv->ule_sndu_len); | |
601 | unsigned short utype = htons(priv->ule_sndu_type); | |
602 | struct kvec iov[3] = { | |
603 | { &ulen, sizeof ulen }, | |
604 | { &utype, sizeof utype }, | |
605 | { priv->ule_skb->data, priv->ule_skb->len - 4 } | |
606 | }; | |
607 | unsigned long ule_crc = ~0L, expected_crc; | |
608 | if (priv->ule_dbit) { | |
609 | /* Set D-bit for CRC32 verification, | |
610 | * if it was set originally. */ | |
611 | ulen |= 0x0080; | |
612 | } | |
613 | ||
614 | ule_crc = iov_crc32(ule_crc, iov, 3); | |
615 | expected_crc = *((u8 *)priv->ule_skb->tail - 4) << 24 | | |
616 | *((u8 *)priv->ule_skb->tail - 3) << 16 | | |
617 | *((u8 *)priv->ule_skb->tail - 2) << 8 | | |
618 | *((u8 *)priv->ule_skb->tail - 1); | |
619 | if (ule_crc != expected_crc) { | |
620 | printk(KERN_WARNING "%lu: CRC32 check FAILED: %#lx / %#lx, SNDU len %d type %#x, ts_remain %d, next 2: %x.\n", | |
621 | 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); | |
622 | ||
623 | #ifdef ULE_DEBUG | |
624 | hexdump( iov[0].iov_base, iov[0].iov_len ); | |
625 | hexdump( iov[1].iov_base, iov[1].iov_len ); | |
626 | hexdump( iov[2].iov_base, iov[2].iov_len ); | |
627 | ||
628 | if (ule_where == ule_hist) { | |
629 | hexdump( &ule_hist[98*TS_SZ], TS_SZ ); | |
630 | hexdump( &ule_hist[99*TS_SZ], TS_SZ ); | |
631 | } else if (ule_where == &ule_hist[TS_SZ]) { | |
632 | hexdump( &ule_hist[99*TS_SZ], TS_SZ ); | |
633 | hexdump( ule_hist, TS_SZ ); | |
634 | } else { | |
635 | hexdump( ule_where - TS_SZ - TS_SZ, TS_SZ ); | |
636 | hexdump( ule_where - TS_SZ, TS_SZ ); | |
637 | } | |
638 | ule_dump = 1; | |
639 | #endif | |
640 | ||
18232ca6 CP |
641 | priv->stats.rx_errors++; |
642 | priv->stats.rx_crc_errors++; | |
1da177e4 LT |
643 | dev_kfree_skb(priv->ule_skb); |
644 | } else { | |
645 | /* CRC32 verified OK. */ | |
18232ca6 CP |
646 | u8 dest_addr[ETH_ALEN]; |
647 | static const u8 bc_addr[ETH_ALEN] = | |
648 | { [ 0 ... ETH_ALEN-1] = 0xff }; | |
649 | ||
650 | /* CRC32 was OK. Remove it from skb. */ | |
651 | priv->ule_skb->tail -= 4; | |
652 | priv->ule_skb->len -= 4; | |
653 | ||
654 | if (!priv->ule_dbit) { | |
655 | /* | |
656 | * The destination MAC address is the | |
657 | * next data in the skb. It comes | |
658 | * before any extension headers. | |
659 | * | |
660 | * Check if the payload of this SNDU | |
661 | * should be passed up the stack. | |
662 | */ | |
663 | register int drop = 0; | |
664 | if (priv->rx_mode != RX_MODE_PROMISC) { | |
665 | if (priv->ule_skb->data[0] & 0x01) { | |
666 | /* multicast or broadcast */ | |
667 | if (memcmp(priv->ule_skb->data, bc_addr, ETH_ALEN)) { | |
668 | /* multicast */ | |
669 | if (priv->rx_mode == RX_MODE_MULTI) { | |
670 | int i; | |
671 | for(i = 0; i < priv->multi_num && memcmp(priv->ule_skb->data, priv->multi_macs[i], ETH_ALEN); i++) | |
672 | ; | |
673 | if (i == priv->multi_num) | |
674 | drop = 1; | |
675 | } else if (priv->rx_mode != RX_MODE_ALL_MULTI) | |
676 | drop = 1; /* no broadcast; */ | |
677 | /* else: all multicast mode: accept all multicast packets */ | |
678 | } | |
679 | /* else: broadcast */ | |
680 | } | |
681 | else if (memcmp(priv->ule_skb->data, dev->dev_addr, ETH_ALEN)) | |
682 | drop = 1; | |
683 | /* else: destination address matches the MAC address of our receiver device */ | |
684 | } | |
685 | /* else: promiscious mode; pass everything up the stack */ | |
686 | ||
687 | if (drop) { | |
688 | #ifdef ULE_DEBUG | |
689 | dprintk("Dropping SNDU: MAC destination address does not match: dest addr: "MAC_ADDR_PRINTFMT", dev addr: "MAC_ADDR_PRINTFMT"\n", | |
690 | MAX_ADDR_PRINTFMT_ARGS(priv->ule_skb->data), MAX_ADDR_PRINTFMT_ARGS(dev->dev_addr)); | |
691 | #endif | |
692 | dev_kfree_skb(priv->ule_skb); | |
693 | goto sndu_done; | |
694 | } | |
695 | else | |
696 | { | |
697 | memcpy(dest_addr, priv->ule_skb->data, ETH_ALEN); | |
698 | skb_pull(priv->ule_skb, ETH_ALEN); | |
699 | } | |
700 | } | |
701 | ||
1da177e4 LT |
702 | /* Handle ULE Extension Headers. */ |
703 | if (priv->ule_sndu_type < 1536) { | |
704 | /* There is an extension header. Handle it accordingly. */ | |
18232ca6 | 705 | int l = handle_ule_extensions(priv); |
1da177e4 LT |
706 | if (l < 0) { |
707 | /* Mandatory extension header unknown or TEST SNDU. Drop it. */ | |
708 | // printk( KERN_WARNING "Dropping SNDU, extension headers.\n" ); | |
18232ca6 | 709 | dev_kfree_skb(priv->ule_skb); |
1da177e4 LT |
710 | goto sndu_done; |
711 | } | |
18232ca6 | 712 | skb_pull(priv->ule_skb, l); |
1da177e4 LT |
713 | } |
714 | ||
18232ca6 CP |
715 | /* |
716 | * Construct/assure correct ethernet header. | |
717 | * Note: in bridged mode (priv->ule_bridged != | |
718 | * 0) we already have the (original) ethernet | |
719 | * header at the start of the payload (after | |
720 | * optional dest. address and any extension | |
721 | * headers). | |
722 | */ | |
723 | ||
724 | if (!priv->ule_bridged) { | |
725 | skb_push(priv->ule_skb, ETH_HLEN); | |
726 | ethh = (struct ethhdr *)priv->ule_skb->data; | |
727 | if (!priv->ule_dbit) { | |
728 | /* dest_addr buffer is only valid if priv->ule_dbit == 0 */ | |
729 | memcpy(ethh->h_dest, dest_addr, ETH_ALEN); | |
730 | memset(ethh->h_source, 0, ETH_ALEN); | |
1da177e4 | 731 | } |
18232ca6 CP |
732 | else /* zeroize source and dest */ |
733 | memset( ethh, 0, ETH_ALEN*2 ); | |
734 | ||
735 | ethh->h_proto = htons(priv->ule_sndu_type); | |
1da177e4 | 736 | } |
18232ca6 | 737 | /* else: skb is in correct state; nothing to do. */ |
1da177e4 LT |
738 | priv->ule_bridged = 0; |
739 | ||
740 | /* Stuff into kernel's protocol stack. */ | |
741 | priv->ule_skb->protocol = dvb_net_eth_type_trans(priv->ule_skb, dev); | |
742 | /* If D-bit is set (i.e. destination MAC address not present), | |
743 | * receive the packet anyhow. */ | |
744 | /* if (priv->ule_dbit && skb->pkt_type == PACKET_OTHERHOST) | |
745 | priv->ule_skb->pkt_type = PACKET_HOST; */ | |
18232ca6 CP |
746 | priv->stats.rx_packets++; |
747 | priv->stats.rx_bytes += priv->ule_skb->len; | |
1da177e4 LT |
748 | netif_rx(priv->ule_skb); |
749 | } | |
750 | sndu_done: | |
751 | /* Prepare for next SNDU. */ | |
752 | reset_ule(priv); | |
753 | } | |
754 | ||
755 | /* More data in current TS (look at the bytes following the CRC32)? */ | |
756 | if (ts_remain >= 2 && *((unsigned short *)from_where) != 0xFFFF) { | |
757 | /* Next ULE SNDU starts right there. */ | |
758 | new_ts = 0; | |
759 | priv->ule_skb = NULL; | |
760 | priv->ule_sndu_type_1 = 0; | |
761 | priv->ule_sndu_len = 0; | |
762 | // printk(KERN_WARNING "More data in current TS: [%#x %#x %#x %#x]\n", | |
763 | // *(from_where + 0), *(from_where + 1), | |
764 | // *(from_where + 2), *(from_where + 3)); | |
765 | // printk(KERN_WARNING "ts @ %p, stopped @ %p:\n", ts, from_where + 0); | |
766 | // hexdump(ts, 188); | |
767 | } else { | |
768 | new_ts = 1; | |
769 | ts += TS_SZ; | |
770 | priv->ts_count++; | |
771 | if (priv->ule_skb == NULL) { | |
772 | priv->need_pusi = 1; | |
773 | priv->ule_sndu_type_1 = 0; | |
774 | priv->ule_sndu_len = 0; | |
775 | } | |
776 | } | |
777 | } /* for all available TS cells */ | |
778 | } | |
779 | ||
780 | static int dvb_net_ts_callback(const u8 *buffer1, size_t buffer1_len, | |
781 | const u8 *buffer2, size_t buffer2_len, | |
782 | struct dmx_ts_feed *feed, enum dmx_success success) | |
783 | { | |
0c53c70f | 784 | struct net_device *dev = feed->priv; |
1da177e4 LT |
785 | |
786 | if (buffer2 != 0) | |
787 | printk(KERN_WARNING "buffer2 not 0: %p.\n", buffer2); | |
788 | if (buffer1_len > 32768) | |
789 | printk(KERN_WARNING "length > 32k: %zu.\n", buffer1_len); | |
790 | /* printk("TS callback: %u bytes, %u TS cells @ %p.\n", | |
afd1a0c9 | 791 | buffer1_len, buffer1_len / TS_SZ, buffer1); */ |
1da177e4 LT |
792 | dvb_net_ule(dev, buffer1, buffer1_len); |
793 | return 0; | |
794 | } | |
795 | ||
796 | ||
797 | static void dvb_net_sec(struct net_device *dev, u8 *pkt, int pkt_len) | |
798 | { | |
afd1a0c9 MCC |
799 | u8 *eth; |
800 | struct sk_buff *skb; | |
1da177e4 | 801 | struct net_device_stats *stats = &(((struct dvb_net_priv *) dev->priv)->stats); |
59142330 | 802 | int snap = 0; |
1da177e4 LT |
803 | |
804 | /* note: pkt_len includes a 32bit checksum */ | |
805 | if (pkt_len < 16) { | |
806 | printk("%s: IP/MPE packet length = %d too small.\n", | |
807 | dev->name, pkt_len); | |
808 | stats->rx_errors++; | |
809 | stats->rx_length_errors++; | |
810 | return; | |
811 | } | |
812 | /* it seems some ISPs manage to screw up here, so we have to | |
813 | * relax the error checks... */ | |
814 | #if 0 | |
815 | if ((pkt[5] & 0xfd) != 0xc1) { | |
816 | /* drop scrambled or broken packets */ | |
817 | #else | |
818 | if ((pkt[5] & 0x3c) != 0x00) { | |
819 | /* drop scrambled */ | |
820 | #endif | |
821 | stats->rx_errors++; | |
822 | stats->rx_crc_errors++; | |
823 | return; | |
824 | } | |
825 | if (pkt[5] & 0x02) { | |
59142330 JS |
826 | /* handle LLC/SNAP, see rfc-1042 */ |
827 | if (pkt_len < 24 || memcmp(&pkt[12], "\xaa\xaa\x03\0\0\0", 6)) { | |
828 | stats->rx_dropped++; | |
829 | return; | |
830 | } | |
831 | snap = 8; | |
afd1a0c9 | 832 | } |
1da177e4 LT |
833 | if (pkt[7]) { |
834 | /* FIXME: assemble datagram from multiple sections */ | |
835 | stats->rx_errors++; | |
836 | stats->rx_frame_errors++; | |
837 | return; | |
838 | } | |
839 | ||
840 | /* we have 14 byte ethernet header (ip header follows); | |
59142330 | 841 | * 12 byte MPE header; 4 byte checksum; + 2 byte alignment, 8 byte LLC/SNAP |
1da177e4 | 842 | */ |
59142330 | 843 | if (!(skb = dev_alloc_skb(pkt_len - 4 - 12 + 14 + 2 - snap))) { |
1da177e4 LT |
844 | //printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n", dev->name); |
845 | stats->rx_dropped++; | |
846 | return; | |
847 | } | |
848 | skb_reserve(skb, 2); /* longword align L3 header */ | |
849 | skb->dev = dev; | |
850 | ||
851 | /* copy L3 payload */ | |
59142330 JS |
852 | eth = (u8 *) skb_put(skb, pkt_len - 12 - 4 + 14 - snap); |
853 | memcpy(eth + 14, pkt + 12 + snap, pkt_len - 12 - 4 - snap); | |
1da177e4 LT |
854 | |
855 | /* create ethernet header: */ | |
afd1a0c9 MCC |
856 | eth[0]=pkt[0x0b]; |
857 | eth[1]=pkt[0x0a]; | |
858 | eth[2]=pkt[0x09]; | |
859 | eth[3]=pkt[0x08]; | |
860 | eth[4]=pkt[0x04]; | |
861 | eth[5]=pkt[0x03]; | |
1da177e4 | 862 | |
afd1a0c9 | 863 | eth[6]=eth[7]=eth[8]=eth[9]=eth[10]=eth[11]=0; |
1da177e4 | 864 | |
59142330 JS |
865 | if (snap) { |
866 | eth[12] = pkt[18]; | |
867 | eth[13] = pkt[19]; | |
868 | } else { | |
869 | /* protocol numbers are from rfc-1700 or | |
870 | * http://www.iana.org/assignments/ethernet-numbers | |
871 | */ | |
872 | if (pkt[12] >> 4 == 6) { /* version field from IP header */ | |
873 | eth[12] = 0x86; /* IPv6 */ | |
874 | eth[13] = 0xdd; | |
875 | } else { | |
876 | eth[12] = 0x08; /* IPv4 */ | |
877 | eth[13] = 0x00; | |
878 | } | |
879 | } | |
1da177e4 LT |
880 | |
881 | skb->protocol = dvb_net_eth_type_trans(skb, dev); | |
882 | ||
883 | stats->rx_packets++; | |
884 | stats->rx_bytes+=skb->len; | |
afd1a0c9 | 885 | netif_rx(skb); |
1da177e4 LT |
886 | } |
887 | ||
888 | static int dvb_net_sec_callback(const u8 *buffer1, size_t buffer1_len, | |
889 | const u8 *buffer2, size_t buffer2_len, | |
890 | struct dmx_section_filter *filter, | |
891 | enum dmx_success success) | |
892 | { | |
afd1a0c9 | 893 | struct net_device *dev = filter->priv; |
1da177e4 LT |
894 | |
895 | /** | |
896 | * we rely on the DVB API definition where exactly one complete | |
897 | * section is delivered in buffer1 | |
898 | */ | |
899 | dvb_net_sec (dev, (u8*) buffer1, buffer1_len); | |
900 | return 0; | |
901 | } | |
902 | ||
903 | static int dvb_net_tx(struct sk_buff *skb, struct net_device *dev) | |
904 | { | |
905 | dev_kfree_skb(skb); | |
906 | return 0; | |
907 | } | |
908 | ||
909 | static u8 mask_normal[6]={0xff, 0xff, 0xff, 0xff, 0xff, 0xff}; | |
910 | static u8 mask_allmulti[6]={0xff, 0xff, 0xff, 0x00, 0x00, 0x00}; | |
911 | static u8 mac_allmulti[6]={0x01, 0x00, 0x5e, 0x00, 0x00, 0x00}; | |
912 | static u8 mask_promisc[6]={0x00, 0x00, 0x00, 0x00, 0x00, 0x00}; | |
913 | ||
914 | static int dvb_net_filter_sec_set(struct net_device *dev, | |
915 | struct dmx_section_filter **secfilter, | |
916 | u8 *mac, u8 *mac_mask) | |
917 | { | |
0c53c70f | 918 | struct dvb_net_priv *priv = dev->priv; |
1da177e4 LT |
919 | int ret; |
920 | ||
921 | *secfilter=NULL; | |
922 | ret = priv->secfeed->allocate_filter(priv->secfeed, secfilter); | |
923 | if (ret<0) { | |
924 | printk("%s: could not get filter\n", dev->name); | |
925 | return ret; | |
926 | } | |
927 | ||
928 | (*secfilter)->priv=(void *) dev; | |
929 | ||
930 | memset((*secfilter)->filter_value, 0x00, DMX_MAX_FILTER_SIZE); | |
931 | memset((*secfilter)->filter_mask, 0x00, DMX_MAX_FILTER_SIZE); | |
932 | memset((*secfilter)->filter_mode, 0xff, DMX_MAX_FILTER_SIZE); | |
933 | ||
934 | (*secfilter)->filter_value[0]=0x3e; | |
935 | (*secfilter)->filter_value[3]=mac[5]; | |
936 | (*secfilter)->filter_value[4]=mac[4]; | |
937 | (*secfilter)->filter_value[8]=mac[3]; | |
938 | (*secfilter)->filter_value[9]=mac[2]; | |
939 | (*secfilter)->filter_value[10]=mac[1]; | |
940 | (*secfilter)->filter_value[11]=mac[0]; | |
941 | ||
942 | (*secfilter)->filter_mask[0] = 0xff; | |
943 | (*secfilter)->filter_mask[3] = mac_mask[5]; | |
944 | (*secfilter)->filter_mask[4] = mac_mask[4]; | |
945 | (*secfilter)->filter_mask[8] = mac_mask[3]; | |
946 | (*secfilter)->filter_mask[9] = mac_mask[2]; | |
947 | (*secfilter)->filter_mask[10] = mac_mask[1]; | |
948 | (*secfilter)->filter_mask[11]=mac_mask[0]; | |
949 | ||
950 | dprintk("%s: filter mac=%02x %02x %02x %02x %02x %02x\n", | |
951 | dev->name, mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]); | |
952 | dprintk("%s: filter mask=%02x %02x %02x %02x %02x %02x\n", | |
953 | dev->name, mac_mask[0], mac_mask[1], mac_mask[2], | |
954 | mac_mask[3], mac_mask[4], mac_mask[5]); | |
955 | ||
956 | return 0; | |
957 | } | |
958 | ||
959 | static int dvb_net_feed_start(struct net_device *dev) | |
960 | { | |
1130ca45 | 961 | int ret = 0, i; |
0c53c70f | 962 | struct dvb_net_priv *priv = dev->priv; |
afd1a0c9 MCC |
963 | struct dmx_demux *demux = priv->demux; |
964 | unsigned char *mac = (unsigned char *) dev->dev_addr; | |
1da177e4 LT |
965 | |
966 | dprintk("%s: rx_mode %i\n", __FUNCTION__, priv->rx_mode); | |
3593cab5 | 967 | mutex_lock(&priv->mutex); |
1da177e4 LT |
968 | if (priv->tsfeed || priv->secfeed || priv->secfilter || priv->multi_secfilter[0]) |
969 | printk("%s: BUG %d\n", __FUNCTION__, __LINE__); | |
970 | ||
971 | priv->secfeed=NULL; | |
972 | priv->secfilter=NULL; | |
973 | priv->tsfeed = NULL; | |
974 | ||
975 | if (priv->feedtype == DVB_NET_FEEDTYPE_MPE) { | |
976 | dprintk("%s: alloc secfeed\n", __FUNCTION__); | |
977 | ret=demux->allocate_section_feed(demux, &priv->secfeed, | |
978 | dvb_net_sec_callback); | |
979 | if (ret<0) { | |
980 | printk("%s: could not allocate section feed\n", dev->name); | |
1130ca45 | 981 | goto error; |
1da177e4 LT |
982 | } |
983 | ||
5d2cd163 | 984 | ret = priv->secfeed->set(priv->secfeed, priv->pid, 32768, 1); |
1da177e4 LT |
985 | |
986 | if (ret<0) { | |
987 | printk("%s: could not set section feed\n", dev->name); | |
988 | priv->demux->release_section_feed(priv->demux, priv->secfeed); | |
989 | priv->secfeed=NULL; | |
1130ca45 | 990 | goto error; |
1da177e4 LT |
991 | } |
992 | ||
993 | if (priv->rx_mode != RX_MODE_PROMISC) { | |
994 | dprintk("%s: set secfilter\n", __FUNCTION__); | |
995 | dvb_net_filter_sec_set(dev, &priv->secfilter, mac, mask_normal); | |
996 | } | |
997 | ||
998 | switch (priv->rx_mode) { | |
999 | case RX_MODE_MULTI: | |
1000 | for (i = 0; i < priv->multi_num; i++) { | |
1001 | dprintk("%s: set multi_secfilter[%d]\n", __FUNCTION__, i); | |
1002 | dvb_net_filter_sec_set(dev, &priv->multi_secfilter[i], | |
1003 | priv->multi_macs[i], mask_normal); | |
1004 | } | |
1005 | break; | |
1006 | case RX_MODE_ALL_MULTI: | |
1007 | priv->multi_num=1; | |
1008 | dprintk("%s: set multi_secfilter[0]\n", __FUNCTION__); | |
1009 | dvb_net_filter_sec_set(dev, &priv->multi_secfilter[0], | |
1010 | mac_allmulti, mask_allmulti); | |
1011 | break; | |
1012 | case RX_MODE_PROMISC: | |
1013 | priv->multi_num=0; | |
1014 | dprintk("%s: set secfilter\n", __FUNCTION__); | |
1015 | dvb_net_filter_sec_set(dev, &priv->secfilter, mac, mask_promisc); | |
1016 | break; | |
1017 | } | |
1018 | ||
1019 | dprintk("%s: start filtering\n", __FUNCTION__); | |
1020 | priv->secfeed->start_filtering(priv->secfeed); | |
1021 | } else if (priv->feedtype == DVB_NET_FEEDTYPE_ULE) { | |
18232ca6 | 1022 | struct timespec timeout = { 0, 10000000 }; // 10 msec |
1da177e4 LT |
1023 | |
1024 | /* we have payloads encapsulated in TS */ | |
1025 | dprintk("%s: alloc tsfeed\n", __FUNCTION__); | |
1026 | ret = demux->allocate_ts_feed(demux, &priv->tsfeed, dvb_net_ts_callback); | |
1027 | if (ret < 0) { | |
1028 | printk("%s: could not allocate ts feed\n", dev->name); | |
1130ca45 | 1029 | goto error; |
1da177e4 LT |
1030 | } |
1031 | ||
1032 | /* Set netdevice pointer for ts decaps callback. */ | |
1033 | priv->tsfeed->priv = (void *)dev; | |
18232ca6 CP |
1034 | ret = priv->tsfeed->set(priv->tsfeed, |
1035 | priv->pid, /* pid */ | |
1036 | TS_PACKET, /* type */ | |
1037 | DMX_TS_PES_OTHER, /* pes type */ | |
1da177e4 | 1038 | 32768, /* circular buffer size */ |
18232ca6 CP |
1039 | timeout /* timeout */ |
1040 | ); | |
1da177e4 LT |
1041 | |
1042 | if (ret < 0) { | |
1043 | printk("%s: could not set ts feed\n", dev->name); | |
1044 | priv->demux->release_ts_feed(priv->demux, priv->tsfeed); | |
1045 | priv->tsfeed = NULL; | |
1130ca45 | 1046 | goto error; |
1da177e4 LT |
1047 | } |
1048 | ||
1049 | dprintk("%s: start filtering\n", __FUNCTION__); | |
1050 | priv->tsfeed->start_filtering(priv->tsfeed); | |
1051 | } else | |
1130ca45 | 1052 | ret = -EINVAL; |
1da177e4 | 1053 | |
1130ca45 | 1054 | error: |
3593cab5 | 1055 | mutex_unlock(&priv->mutex); |
1130ca45 | 1056 | return ret; |
1da177e4 LT |
1057 | } |
1058 | ||
1059 | static int dvb_net_feed_stop(struct net_device *dev) | |
1060 | { | |
0c53c70f | 1061 | struct dvb_net_priv *priv = dev->priv; |
1130ca45 | 1062 | int i, ret = 0; |
1da177e4 LT |
1063 | |
1064 | dprintk("%s\n", __FUNCTION__); | |
3593cab5 | 1065 | mutex_lock(&priv->mutex); |
1da177e4 LT |
1066 | if (priv->feedtype == DVB_NET_FEEDTYPE_MPE) { |
1067 | if (priv->secfeed) { | |
1068 | if (priv->secfeed->is_filtering) { | |
1069 | dprintk("%s: stop secfeed\n", __FUNCTION__); | |
1070 | priv->secfeed->stop_filtering(priv->secfeed); | |
1071 | } | |
1072 | ||
1073 | if (priv->secfilter) { | |
1074 | dprintk("%s: release secfilter\n", __FUNCTION__); | |
1075 | priv->secfeed->release_filter(priv->secfeed, | |
1076 | priv->secfilter); | |
1077 | priv->secfilter=NULL; | |
1078 | } | |
1079 | ||
1080 | for (i=0; i<priv->multi_num; i++) { | |
1081 | if (priv->multi_secfilter[i]) { | |
1082 | dprintk("%s: release multi_filter[%d]\n", | |
1083 | __FUNCTION__, i); | |
1084 | priv->secfeed->release_filter(priv->secfeed, | |
1085 | priv->multi_secfilter[i]); | |
1086 | priv->multi_secfilter[i] = NULL; | |
1087 | } | |
1088 | } | |
1089 | ||
1090 | priv->demux->release_section_feed(priv->demux, priv->secfeed); | |
1091 | priv->secfeed = NULL; | |
1092 | } else | |
1093 | printk("%s: no feed to stop\n", dev->name); | |
1094 | } else if (priv->feedtype == DVB_NET_FEEDTYPE_ULE) { | |
1095 | if (priv->tsfeed) { | |
1096 | if (priv->tsfeed->is_filtering) { | |
1097 | dprintk("%s: stop tsfeed\n", __FUNCTION__); | |
1098 | priv->tsfeed->stop_filtering(priv->tsfeed); | |
1099 | } | |
1100 | priv->demux->release_ts_feed(priv->demux, priv->tsfeed); | |
1101 | priv->tsfeed = NULL; | |
1102 | } | |
1103 | else | |
1104 | printk("%s: no ts feed to stop\n", dev->name); | |
1105 | } else | |
1130ca45 | 1106 | ret = -EINVAL; |
3593cab5 | 1107 | mutex_unlock(&priv->mutex); |
1130ca45 | 1108 | return ret; |
1da177e4 LT |
1109 | } |
1110 | ||
1111 | ||
1112 | static int dvb_set_mc_filter (struct net_device *dev, struct dev_mc_list *mc) | |
1113 | { | |
0c53c70f | 1114 | struct dvb_net_priv *priv = dev->priv; |
1da177e4 LT |
1115 | |
1116 | if (priv->multi_num == DVB_NET_MULTICAST_MAX) | |
1117 | return -ENOMEM; | |
1118 | ||
1119 | memcpy(priv->multi_macs[priv->multi_num], mc->dmi_addr, 6); | |
1120 | ||
1121 | priv->multi_num++; | |
1122 | return 0; | |
1123 | } | |
1124 | ||
1125 | ||
1126 | static void wq_set_multicast_list (void *data) | |
1127 | { | |
1128 | struct net_device *dev = data; | |
0c53c70f | 1129 | struct dvb_net_priv *priv = dev->priv; |
1da177e4 LT |
1130 | |
1131 | dvb_net_feed_stop(dev); | |
1da177e4 | 1132 | priv->rx_mode = RX_MODE_UNI; |
932ff279 | 1133 | netif_tx_lock_bh(dev); |
1da177e4 LT |
1134 | |
1135 | if (dev->flags & IFF_PROMISC) { | |
1136 | dprintk("%s: promiscuous mode\n", dev->name); | |
1137 | priv->rx_mode = RX_MODE_PROMISC; | |
1138 | } else if ((dev->flags & IFF_ALLMULTI)) { | |
1139 | dprintk("%s: allmulti mode\n", dev->name); | |
1140 | priv->rx_mode = RX_MODE_ALL_MULTI; | |
1141 | } else if (dev->mc_count) { | |
1142 | int mci; | |
1143 | struct dev_mc_list *mc; | |
1144 | ||
1145 | dprintk("%s: set_mc_list, %d entries\n", | |
1146 | dev->name, dev->mc_count); | |
1147 | ||
1148 | priv->rx_mode = RX_MODE_MULTI; | |
1149 | priv->multi_num = 0; | |
1150 | ||
1151 | for (mci = 0, mc=dev->mc_list; | |
1152 | mci < dev->mc_count; | |
1153 | mc = mc->next, mci++) { | |
1154 | dvb_set_mc_filter(dev, mc); | |
1155 | } | |
1156 | } | |
1157 | ||
932ff279 | 1158 | netif_tx_unlock_bh(dev); |
1da177e4 LT |
1159 | dvb_net_feed_start(dev); |
1160 | } | |
1161 | ||
1162 | ||
1163 | static void dvb_net_set_multicast_list (struct net_device *dev) | |
1164 | { | |
0c53c70f | 1165 | struct dvb_net_priv *priv = dev->priv; |
1da177e4 LT |
1166 | schedule_work(&priv->set_multicast_list_wq); |
1167 | } | |
1168 | ||
1169 | ||
1170 | static void wq_restart_net_feed (void *data) | |
1171 | { | |
1172 | struct net_device *dev = data; | |
1173 | ||
1174 | if (netif_running(dev)) { | |
1175 | dvb_net_feed_stop(dev); | |
1176 | dvb_net_feed_start(dev); | |
1177 | } | |
1178 | } | |
1179 | ||
1180 | ||
1181 | static int dvb_net_set_mac (struct net_device *dev, void *p) | |
1182 | { | |
0c53c70f | 1183 | struct dvb_net_priv *priv = dev->priv; |
1da177e4 LT |
1184 | struct sockaddr *addr=p; |
1185 | ||
1186 | memcpy(dev->dev_addr, addr->sa_data, dev->addr_len); | |
1187 | ||
1188 | if (netif_running(dev)) | |
1189 | schedule_work(&priv->restart_net_feed_wq); | |
1190 | ||
1191 | return 0; | |
1192 | } | |
1193 | ||
1194 | ||
1195 | static int dvb_net_open(struct net_device *dev) | |
1196 | { | |
0c53c70f | 1197 | struct dvb_net_priv *priv = dev->priv; |
1da177e4 LT |
1198 | |
1199 | priv->in_use++; | |
1200 | dvb_net_feed_start(dev); | |
1201 | return 0; | |
1202 | } | |
1203 | ||
1204 | ||
1205 | static int dvb_net_stop(struct net_device *dev) | |
1206 | { | |
0c53c70f | 1207 | struct dvb_net_priv *priv = dev->priv; |
1da177e4 LT |
1208 | |
1209 | priv->in_use--; | |
afd1a0c9 | 1210 | return dvb_net_feed_stop(dev); |
1da177e4 LT |
1211 | } |
1212 | ||
1213 | static struct net_device_stats * dvb_net_get_stats(struct net_device *dev) | |
1214 | { | |
afd1a0c9 | 1215 | return &((struct dvb_net_priv*) dev->priv)->stats; |
1da177e4 LT |
1216 | } |
1217 | ||
1218 | static void dvb_net_setup(struct net_device *dev) | |
1219 | { | |
1220 | ether_setup(dev); | |
1221 | ||
1222 | dev->open = dvb_net_open; | |
1223 | dev->stop = dvb_net_stop; | |
1224 | dev->hard_start_xmit = dvb_net_tx; | |
1225 | dev->get_stats = dvb_net_get_stats; | |
1226 | dev->set_multicast_list = dvb_net_set_multicast_list; | |
1227 | dev->set_mac_address = dvb_net_set_mac; | |
1228 | dev->mtu = 4096; | |
1229 | dev->mc_count = 0; | |
1230 | dev->hard_header_cache = NULL; | |
1231 | dev->flags |= IFF_NOARP; | |
1232 | } | |
1233 | ||
1234 | static int get_if(struct dvb_net *dvbnet) | |
1235 | { | |
1236 | int i; | |
1237 | ||
1238 | for (i=0; i<DVB_NET_DEVICES_MAX; i++) | |
1239 | if (!dvbnet->state[i]) | |
1240 | break; | |
1241 | ||
1242 | if (i == DVB_NET_DEVICES_MAX) | |
1243 | return -1; | |
1244 | ||
1245 | dvbnet->state[i]=1; | |
1246 | return i; | |
1247 | } | |
1248 | ||
1249 | static int dvb_net_add_if(struct dvb_net *dvbnet, u16 pid, u8 feedtype) | |
1250 | { | |
1251 | struct net_device *net; | |
1252 | struct dvb_net_priv *priv; | |
1253 | int result; | |
1254 | int if_num; | |
1255 | ||
1256 | if (feedtype != DVB_NET_FEEDTYPE_MPE && feedtype != DVB_NET_FEEDTYPE_ULE) | |
1257 | return -EINVAL; | |
1258 | if ((if_num = get_if(dvbnet)) < 0) | |
1259 | return -EINVAL; | |
1260 | ||
1261 | net = alloc_netdev(sizeof(struct dvb_net_priv), "dvb", dvb_net_setup); | |
1262 | if (!net) | |
1263 | return -ENOMEM; | |
1264 | ||
1265 | if (dvbnet->dvbdev->id) | |
1266 | snprintf(net->name, IFNAMSIZ, "dvb%d%u%d", | |
1267 | dvbnet->dvbdev->adapter->num, dvbnet->dvbdev->id, if_num); | |
1268 | else | |
1269 | /* compatibility fix to keep dvb0_0 format */ | |
1270 | snprintf(net->name, IFNAMSIZ, "dvb%d_%d", | |
1271 | dvbnet->dvbdev->adapter->num, if_num); | |
1272 | ||
1273 | net->addr_len = 6; | |
1274 | memcpy(net->dev_addr, dvbnet->dvbdev->adapter->proposed_mac, 6); | |
1275 | ||
1276 | dvbnet->device[if_num] = net; | |
1277 | ||
1278 | priv = net->priv; | |
1279 | priv->demux = dvbnet->demux; | |
1280 | priv->pid = pid; | |
1281 | priv->rx_mode = RX_MODE_UNI; | |
1282 | priv->need_pusi = 1; | |
1283 | priv->tscc = 0; | |
1284 | priv->feedtype = feedtype; | |
1285 | reset_ule(priv); | |
1286 | ||
1287 | INIT_WORK(&priv->set_multicast_list_wq, wq_set_multicast_list, net); | |
1288 | INIT_WORK(&priv->restart_net_feed_wq, wq_restart_net_feed, net); | |
3593cab5 | 1289 | mutex_init(&priv->mutex); |
1da177e4 LT |
1290 | |
1291 | net->base_addr = pid; | |
1292 | ||
1293 | if ((result = register_netdev(net)) < 0) { | |
1294 | dvbnet->device[if_num] = NULL; | |
1295 | free_netdev(net); | |
1296 | return result; | |
1297 | } | |
1298 | printk("dvb_net: created network interface %s\n", net->name); | |
1299 | ||
1300 | return if_num; | |
1301 | } | |
1302 | ||
400b7083 | 1303 | static int dvb_net_remove_if(struct dvb_net *dvbnet, unsigned long num) |
1da177e4 LT |
1304 | { |
1305 | struct net_device *net = dvbnet->device[num]; | |
1306 | struct dvb_net_priv *priv; | |
1307 | ||
1308 | if (!dvbnet->state[num]) | |
1309 | return -EINVAL; | |
1310 | priv = net->priv; | |
1311 | if (priv->in_use) | |
1312 | return -EBUSY; | |
1313 | ||
1314 | dvb_net_stop(net); | |
1315 | flush_scheduled_work(); | |
1316 | printk("dvb_net: removed network interface %s\n", net->name); | |
1317 | unregister_netdev(net); | |
1318 | dvbnet->state[num]=0; | |
1319 | dvbnet->device[num] = NULL; | |
1320 | free_netdev(net); | |
1321 | ||
1322 | return 0; | |
1323 | } | |
1324 | ||
1325 | static int dvb_net_do_ioctl(struct inode *inode, struct file *file, | |
1326 | unsigned int cmd, void *parg) | |
1327 | { | |
0c53c70f JS |
1328 | struct dvb_device *dvbdev = file->private_data; |
1329 | struct dvb_net *dvbnet = dvbdev->priv; | |
1da177e4 LT |
1330 | |
1331 | if (((file->f_flags&O_ACCMODE)==O_RDONLY)) | |
1332 | return -EPERM; | |
1333 | ||
1334 | switch (cmd) { | |
1335 | case NET_ADD_IF: | |
1336 | { | |
0c53c70f | 1337 | struct dvb_net_if *dvbnetif = parg; |
1da177e4 LT |
1338 | int result; |
1339 | ||
1340 | if (!capable(CAP_SYS_ADMIN)) | |
1341 | return -EPERM; | |
1342 | ||
1343 | if (!try_module_get(dvbdev->adapter->module)) | |
1344 | return -EPERM; | |
1345 | ||
1346 | result=dvb_net_add_if(dvbnet, dvbnetif->pid, dvbnetif->feedtype); | |
1347 | if (result<0) { | |
1348 | module_put(dvbdev->adapter->module); | |
1349 | return result; | |
1350 | } | |
1351 | dvbnetif->if_num=result; | |
1352 | break; | |
1353 | } | |
1354 | case NET_GET_IF: | |
1355 | { | |
1356 | struct net_device *netdev; | |
1357 | struct dvb_net_priv *priv_data; | |
0c53c70f | 1358 | struct dvb_net_if *dvbnetif = parg; |
1da177e4 LT |
1359 | |
1360 | if (dvbnetif->if_num >= DVB_NET_DEVICES_MAX || | |
1361 | !dvbnet->state[dvbnetif->if_num]) | |
1362 | return -EINVAL; | |
1363 | ||
1364 | netdev = dvbnet->device[dvbnetif->if_num]; | |
1365 | ||
0c53c70f | 1366 | priv_data = netdev->priv; |
1da177e4 LT |
1367 | dvbnetif->pid=priv_data->pid; |
1368 | dvbnetif->feedtype=priv_data->feedtype; | |
1369 | break; | |
1370 | } | |
1371 | case NET_REMOVE_IF: | |
1372 | { | |
1373 | int ret; | |
1374 | ||
1375 | if (!capable(CAP_SYS_ADMIN)) | |
1376 | return -EPERM; | |
e18828e4 | 1377 | if ((unsigned long) parg >= DVB_NET_DEVICES_MAX) |
1da177e4 | 1378 | return -EINVAL; |
e18828e4 | 1379 | ret = dvb_net_remove_if(dvbnet, (unsigned long) parg); |
1da177e4 LT |
1380 | if (!ret) |
1381 | module_put(dvbdev->adapter->module); | |
1382 | return ret; | |
1383 | } | |
1384 | ||
1385 | /* binary compatiblity cruft */ | |
1386 | case __NET_ADD_IF_OLD: | |
1387 | { | |
0c53c70f | 1388 | struct __dvb_net_if_old *dvbnetif = parg; |
1da177e4 LT |
1389 | int result; |
1390 | ||
1391 | if (!capable(CAP_SYS_ADMIN)) | |
1392 | return -EPERM; | |
1393 | ||
1394 | if (!try_module_get(dvbdev->adapter->module)) | |
1395 | return -EPERM; | |
1396 | ||
1397 | result=dvb_net_add_if(dvbnet, dvbnetif->pid, DVB_NET_FEEDTYPE_MPE); | |
1398 | if (result<0) { | |
1399 | module_put(dvbdev->adapter->module); | |
1400 | return result; | |
1401 | } | |
1402 | dvbnetif->if_num=result; | |
1403 | break; | |
1404 | } | |
1405 | case __NET_GET_IF_OLD: | |
1406 | { | |
1407 | struct net_device *netdev; | |
1408 | struct dvb_net_priv *priv_data; | |
0c53c70f | 1409 | struct __dvb_net_if_old *dvbnetif = parg; |
1da177e4 LT |
1410 | |
1411 | if (dvbnetif->if_num >= DVB_NET_DEVICES_MAX || | |
1412 | !dvbnet->state[dvbnetif->if_num]) | |
1413 | return -EINVAL; | |
1414 | ||
1415 | netdev = dvbnet->device[dvbnetif->if_num]; | |
1416 | ||
0c53c70f | 1417 | priv_data = netdev->priv; |
1da177e4 LT |
1418 | dvbnetif->pid=priv_data->pid; |
1419 | break; | |
1420 | } | |
1421 | default: | |
1422 | return -ENOTTY; | |
1423 | } | |
1424 | return 0; | |
1425 | } | |
1426 | ||
1427 | static int dvb_net_ioctl(struct inode *inode, struct file *file, | |
1428 | unsigned int cmd, unsigned long arg) | |
1429 | { | |
1430 | return dvb_usercopy(inode, file, cmd, arg, dvb_net_do_ioctl); | |
1431 | } | |
1432 | ||
1433 | static struct file_operations dvb_net_fops = { | |
1434 | .owner = THIS_MODULE, | |
1435 | .ioctl = dvb_net_ioctl, | |
1436 | .open = dvb_generic_open, | |
1437 | .release = dvb_generic_release, | |
1438 | }; | |
1439 | ||
1440 | static struct dvb_device dvbdev_net = { | |
afd1a0c9 MCC |
1441 | .priv = NULL, |
1442 | .users = 1, | |
1443 | .writers = 1, | |
1444 | .fops = &dvb_net_fops, | |
1da177e4 LT |
1445 | }; |
1446 | ||
1447 | ||
1448 | void dvb_net_release (struct dvb_net *dvbnet) | |
1449 | { | |
1450 | int i; | |
1451 | ||
1452 | dvb_unregister_device(dvbnet->dvbdev); | |
1453 | ||
1454 | for (i=0; i<DVB_NET_DEVICES_MAX; i++) { | |
1455 | if (!dvbnet->state[i]) | |
1456 | continue; | |
1457 | dvb_net_remove_if(dvbnet, i); | |
1458 | } | |
1459 | } | |
1460 | EXPORT_SYMBOL(dvb_net_release); | |
1461 | ||
1462 | ||
1463 | int dvb_net_init (struct dvb_adapter *adap, struct dvb_net *dvbnet, | |
1464 | struct dmx_demux *dmx) | |
1465 | { | |
1466 | int i; | |
1467 | ||
1468 | dvbnet->demux = dmx; | |
1469 | ||
1470 | for (i=0; i<DVB_NET_DEVICES_MAX; i++) | |
1471 | dvbnet->state[i] = 0; | |
1472 | ||
1473 | dvb_register_device (adap, &dvbnet->dvbdev, &dvbdev_net, | |
1474 | dvbnet, DVB_DEVICE_NET); | |
1475 | ||
1476 | return 0; | |
1477 | } | |
1478 | EXPORT_SYMBOL(dvb_net_init); |