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Commit | Line | Data |
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3712b42d KK |
1 | /* |
2 | ||
3 | * l1oip.c low level driver for tunneling layer 1 over IP | |
4 | * | |
5 | * NOTE: It is not compatible with TDMoIP nor "ISDN over IP". | |
6 | * | |
7 | * Author Andreas Eversberg (jolly@eversberg.eu) | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2, or (at your option) | |
12 | * any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; if not, write to the Free Software | |
21 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
22 | * | |
23 | */ | |
24 | ||
25 | /* module parameters: | |
26 | * type: | |
475be4d8 JP |
27 | Value 1 = BRI |
28 | Value 2 = PRI | |
29 | Value 3 = BRI (multi channel frame, not supported yet) | |
30 | Value 4 = PRI (multi channel frame, not supported yet) | |
31 | A multi channel frame reduces overhead to a single frame for all | |
32 | b-channels, but increases delay. | |
33 | (NOTE: Multi channel frames are not implemented yet.) | |
3712b42d KK |
34 | |
35 | * codec: | |
475be4d8 JP |
36 | Value 0 = transparent (default) |
37 | Value 1 = transfer ALAW | |
38 | Value 2 = transfer ULAW | |
39 | Value 3 = transfer generic 4 bit compression. | |
3712b42d KK |
40 | |
41 | * ulaw: | |
475be4d8 JP |
42 | 0 = we use a-Law (default) |
43 | 1 = we use u-Law | |
3712b42d KK |
44 | |
45 | * limit: | |
475be4d8 JP |
46 | limitation of B-channels to control bandwidth (1...126) |
47 | BRI: 1 or 2 | |
48 | PRI: 1-30, 31-126 (126, because dchannel ist not counted here) | |
49 | Also limited ressources are used for stack, resulting in less channels. | |
50 | It is possible to have more channels than 30 in PRI mode, this must | |
51 | be supported by the application. | |
3712b42d KK |
52 | |
53 | * ip: | |
475be4d8 JP |
54 | byte representation of remote ip address (127.0.0.1 -> 127,0,0,1) |
55 | If not given or four 0, no remote address is set. | |
56 | For multiple interfaces, concat ip addresses. (127,0,0,1,127,0,0,1) | |
3712b42d KK |
57 | |
58 | * port: | |
475be4d8 JP |
59 | port number (local interface) |
60 | If not given or 0, port 931 is used for fist instance, 932 for next... | |
61 | For multiple interfaces, different ports must be given. | |
3712b42d KK |
62 | |
63 | * remoteport: | |
475be4d8 JP |
64 | port number (remote interface) |
65 | If not given or 0, remote port equals local port | |
66 | For multiple interfaces on equal sites, different ports must be given. | |
3712b42d KK |
67 | |
68 | * ondemand: | |
475be4d8 JP |
69 | 0 = fixed (always transmit packets, even when remote side timed out) |
70 | 1 = on demand (only transmit packets, when remote side is detected) | |
71 | the default is 0 | |
72 | NOTE: ID must also be set for on demand. | |
3712b42d KK |
73 | |
74 | * id: | |
475be4d8 JP |
75 | optional value to identify frames. This value must be equal on both |
76 | peers and should be random. If omitted or 0, no ID is transmitted. | |
3712b42d KK |
77 | |
78 | * debug: | |
475be4d8 JP |
79 | NOTE: only one debug value must be given for all cards |
80 | enable debugging (see l1oip.h for debug options) | |
3712b42d KK |
81 | |
82 | ||
475be4d8 | 83 | Special mISDN controls: |
3712b42d KK |
84 | |
85 | op = MISDN_CTRL_SETPEER* | |
86 | p1 = bytes 0-3 : remote IP address in network order (left element first) | |
87 | p2 = bytes 1-2 : remote port in network order (high byte first) | |
88 | optional: | |
89 | p2 = bytes 3-4 : local port in network order (high byte first) | |
90 | ||
91 | op = MISDN_CTRL_UNSETPEER* | |
92 | ||
93 | * Use l1oipctrl for comfortable setting or removing ip address. | |
475be4d8 | 94 | (Layer 1 Over IP CTRL) |
3712b42d KK |
95 | |
96 | ||
475be4d8 JP |
97 | L1oIP-Protocol |
98 | -------------- | |
3712b42d | 99 | |
475be4d8 | 100 | Frame Header: |
3712b42d KK |
101 | |
102 | 7 6 5 4 3 2 1 0 | |
475be4d8 JP |
103 | +---------------+ |
104 | |Ver|T|I|Coding | | |
105 | +---------------+ | |
106 | | ID byte 3 * | | |
107 | +---------------+ | |
108 | | ID byte 2 * | | |
109 | +---------------+ | |
110 | | ID byte 1 * | | |
111 | +---------------+ | |
112 | | ID byte 0 * | | |
113 | +---------------+ | |
114 | |M| Channel | | |
115 | +---------------+ | |
116 | | Length * | | |
117 | +---------------+ | |
118 | | Time Base MSB | | |
119 | +---------------+ | |
120 | | Time Base LSB | | |
121 | +---------------+ | |
122 | | Data.... | | |
123 | ||
124 | ... | |
125 | ||
126 | | | | |
127 | +---------------+ | |
128 | |M| Channel | | |
129 | +---------------+ | |
130 | | Length * | | |
131 | +---------------+ | |
132 | | Time Base MSB | | |
133 | +---------------+ | |
134 | | Time Base LSB | | |
135 | +---------------+ | |
136 | | Data.... | | |
137 | ||
138 | ... | |
139 | ||
140 | ||
141 | * Only included in some cases. | |
142 | ||
143 | - Ver = Version | |
144 | If version is missmatch, the frame must be ignored. | |
145 | ||
146 | - T = Type of interface | |
147 | Must be 0 for S0 or 1 for E1. | |
148 | ||
149 | - I = Id present | |
150 | If bit is set, four ID bytes are included in frame. | |
151 | ||
152 | - ID = Connection ID | |
153 | Additional ID to prevent Denial of Service attacs. Also it prevents hijacking | |
154 | connections with dynamic IP. The ID should be random and must not be 0. | |
155 | ||
156 | - Coding = Type of codec | |
157 | Must be 0 for no transcoding. Also for D-channel and other HDLC frames. | |
3712b42d KK |
158 | 1 and 2 are reserved for explicitly use of a-LAW or u-LAW codec. |
159 | 3 is used for generic table compressor. | |
160 | ||
475be4d8 JP |
161 | - M = More channels to come. If this flag is 1, the following byte contains |
162 | the length of the channel data. After the data block, the next channel will | |
163 | be defined. The flag for the last channel block (or if only one channel is | |
164 | transmitted), must be 0 and no length is given. | |
3712b42d | 165 | |
475be4d8 JP |
166 | - Channel = Channel number |
167 | 0 reserved | |
168 | 1-3 channel data for S0 (3 is D-channel) | |
169 | 1-31 channel data for E1 (16 is D-channel) | |
170 | 32-127 channel data for extended E1 (16 is D-channel) | |
3712b42d | 171 | |
475be4d8 JP |
172 | - The length is used if the M-flag is 1. It is used to find the next channel |
173 | inside frame. | |
174 | NOTE: A value of 0 equals 256 bytes of data. | |
3712b42d KK |
175 | -> For larger data blocks, a single frame must be used. |
176 | -> For larger streams, a single frame or multiple blocks with same channel ID | |
475be4d8 | 177 | must be used. |
3712b42d | 178 | |
475be4d8 JP |
179 | - Time Base = Timestamp of first sample in frame |
180 | The "Time Base" is used to rearange packets and to detect packet loss. | |
181 | The 16 bits are sent in network order (MSB first) and count 1/8000 th of a | |
182 | second. This causes a wrap around each 8,192 seconds. There is no requirement | |
183 | for the initial "Time Base", but 0 should be used for the first packet. | |
184 | In case of HDLC data, this timestamp counts the packet or byte number. | |
3712b42d KK |
185 | |
186 | ||
475be4d8 | 187 | Two Timers: |
3712b42d | 188 | |
475be4d8 JP |
189 | After initialisation, a timer of 15 seconds is started. Whenever a packet is |
190 | transmitted, the timer is reset to 15 seconds again. If the timer expires, an | |
191 | empty packet is transmitted. This keep the connection alive. | |
3712b42d | 192 | |
475be4d8 JP |
193 | When a valid packet is received, a timer 65 seconds is started. The interface |
194 | become ACTIVE. If the timer expires, the interface becomes INACTIVE. | |
3712b42d KK |
195 | |
196 | ||
475be4d8 | 197 | Dynamic IP handling: |
3712b42d | 198 | |
475be4d8 JP |
199 | To allow dynamic IP, the ID must be non 0. In this case, any packet with the |
200 | correct port number and ID will be accepted. If the remote side changes its IP | |
201 | the new IP is used for all transmitted packets until it changes again. | |
3712b42d KK |
202 | |
203 | ||
475be4d8 | 204 | On Demand: |
3712b42d | 205 | |
475be4d8 JP |
206 | If the ondemand parameter is given, the remote IP is set to 0 on timeout. |
207 | This will stop keepalive traffic to remote. If the remote is online again, | |
208 | traffic will continue to the remote address. This is useful for road warriors. | |
209 | This feature only works with ID set, otherwhise it is highly unsecure. | |
3712b42d KK |
210 | |
211 | ||
475be4d8 JP |
212 | Socket and Thread |
213 | ----------------- | |
3712b42d | 214 | |
475be4d8 JP |
215 | The complete socket opening and closing is done by a thread. |
216 | When the thread opened a socket, the hc->socket descriptor is set. Whenever a | |
217 | packet shall be sent to the socket, the hc->socket must be checked wheter not | |
218 | NULL. To prevent change in socket descriptor, the hc->socket_lock must be used. | |
219 | To change the socket, a recall of l1oip_socket_open() will safely kill the | |
220 | socket process and create a new one. | |
3712b42d KK |
221 | |
222 | */ | |
223 | ||
224 | #define L1OIP_VERSION 0 /* 0...3 */ | |
225 | ||
226 | #include <linux/module.h> | |
227 | #include <linux/delay.h> | |
228 | #include <linux/mISDNif.h> | |
229 | #include <linux/mISDNhw.h> | |
230 | #include <linux/mISDNdsp.h> | |
231 | #include <linux/init.h> | |
232 | #include <linux/in.h> | |
233 | #include <linux/inet.h> | |
234 | #include <linux/workqueue.h> | |
235 | #include <linux/kthread.h> | |
5a0e3ad6 | 236 | #include <linux/slab.h> |
3f07c014 IM |
237 | #include <linux/sched/signal.h> |
238 | ||
3712b42d KK |
239 | #include <net/sock.h> |
240 | #include "core.h" | |
241 | #include "l1oip.h" | |
242 | ||
243 | static const char *l1oip_revision = "2.00"; | |
244 | ||
245 | static int l1oip_cnt; | |
246 | static spinlock_t l1oip_lock; | |
247 | static struct list_head l1oip_ilist; | |
248 | ||
249 | #define MAX_CARDS 16 | |
250 | static u_int type[MAX_CARDS]; | |
251 | static u_int codec[MAX_CARDS]; | |
475be4d8 | 252 | static u_int ip[MAX_CARDS * 4]; |
3712b42d KK |
253 | static u_int port[MAX_CARDS]; |
254 | static u_int remoteport[MAX_CARDS]; | |
255 | static u_int ondemand[MAX_CARDS]; | |
256 | static u_int limit[MAX_CARDS]; | |
257 | static u_int id[MAX_CARDS]; | |
258 | static int debug; | |
259 | static int ulaw; | |
260 | ||
261 | MODULE_AUTHOR("Andreas Eversberg"); | |
262 | MODULE_LICENSE("GPL"); | |
263 | module_param_array(type, uint, NULL, S_IRUGO | S_IWUSR); | |
264 | module_param_array(codec, uint, NULL, S_IRUGO | S_IWUSR); | |
265 | module_param_array(ip, uint, NULL, S_IRUGO | S_IWUSR); | |
266 | module_param_array(port, uint, NULL, S_IRUGO | S_IWUSR); | |
267 | module_param_array(remoteport, uint, NULL, S_IRUGO | S_IWUSR); | |
268 | module_param_array(ondemand, uint, NULL, S_IRUGO | S_IWUSR); | |
269 | module_param_array(limit, uint, NULL, S_IRUGO | S_IWUSR); | |
270 | module_param_array(id, uint, NULL, S_IRUGO | S_IWUSR); | |
271 | module_param(ulaw, uint, S_IRUGO | S_IWUSR); | |
272 | module_param(debug, uint, S_IRUGO | S_IWUSR); | |
273 | ||
274 | /* | |
275 | * send a frame via socket, if open and restart timer | |
276 | */ | |
277 | static int | |
278 | l1oip_socket_send(struct l1oip *hc, u8 localcodec, u8 channel, u32 chanmask, | |
475be4d8 | 279 | u16 timebase, u8 *buf, int len) |
3712b42d KK |
280 | { |
281 | u8 *p; | |
475be4d8 | 282 | u8 frame[len + 32]; |
3712b42d | 283 | struct socket *socket = NULL; |
3712b42d KK |
284 | |
285 | if (debug & DEBUG_L1OIP_MSG) | |
286 | printk(KERN_DEBUG "%s: sending data to socket (len = %d)\n", | |
475be4d8 | 287 | __func__, len); |
3712b42d KK |
288 | |
289 | p = frame; | |
290 | ||
291 | /* restart timer */ | |
87f03cc3 MS |
292 | if (time_before(hc->keep_tl.expires, jiffies + 5 * HZ)) |
293 | mod_timer(&hc->keep_tl, jiffies + L1OIP_KEEPALIVE * HZ); | |
294 | else | |
475be4d8 | 295 | hc->keep_tl.expires = jiffies + L1OIP_KEEPALIVE * HZ; |
3712b42d KK |
296 | |
297 | if (debug & DEBUG_L1OIP_MSG) | |
298 | printk(KERN_DEBUG "%s: resetting timer\n", __func__); | |
299 | ||
300 | /* drop if we have no remote ip or port */ | |
301 | if (!hc->sin_remote.sin_addr.s_addr || !hc->sin_remote.sin_port) { | |
302 | if (debug & DEBUG_L1OIP_MSG) | |
303 | printk(KERN_DEBUG "%s: dropping frame, because remote " | |
475be4d8 | 304 | "IP is not set.\n", __func__); |
3712b42d KK |
305 | return len; |
306 | } | |
307 | ||
308 | /* assemble frame */ | |
475be4d8 JP |
309 | *p++ = (L1OIP_VERSION << 6) /* version and coding */ |
310 | | (hc->pri ? 0x20 : 0x00) /* type */ | |
311 | | (hc->id ? 0x10 : 0x00) /* id */ | |
312 | | localcodec; | |
3712b42d | 313 | if (hc->id) { |
475be4d8 JP |
314 | *p++ = hc->id >> 24; /* id */ |
315 | *p++ = hc->id >> 16; | |
316 | *p++ = hc->id >> 8; | |
3712b42d KK |
317 | *p++ = hc->id; |
318 | } | |
0f15b151 | 319 | *p++ = 0x00 + channel; /* m-flag, channel */ |
475be4d8 | 320 | *p++ = timebase >> 8; /* time base */ |
3712b42d KK |
321 | *p++ = timebase; |
322 | ||
323 | if (buf && len) { /* add data to frame */ | |
324 | if (localcodec == 1 && ulaw) | |
325 | l1oip_ulaw_to_alaw(buf, len, p); | |
326 | else if (localcodec == 2 && !ulaw) | |
327 | l1oip_alaw_to_ulaw(buf, len, p); | |
328 | else if (localcodec == 3) | |
329 | len = l1oip_law_to_4bit(buf, len, p, | |
475be4d8 | 330 | &hc->chan[channel].codecstate); |
3712b42d KK |
331 | else |
332 | memcpy(p, buf, len); | |
333 | } | |
334 | len += p - frame; | |
335 | ||
336 | /* check for socket in safe condition */ | |
337 | spin_lock(&hc->socket_lock); | |
338 | if (!hc->socket) { | |
339 | spin_unlock(&hc->socket_lock); | |
340 | return 0; | |
341 | } | |
342 | /* seize socket */ | |
343 | socket = hc->socket; | |
344 | hc->socket = NULL; | |
345 | spin_unlock(&hc->socket_lock); | |
346 | /* send packet */ | |
347 | if (debug & DEBUG_L1OIP_MSG) | |
348 | printk(KERN_DEBUG "%s: sending packet to socket (len " | |
475be4d8 | 349 | "= %d)\n", __func__, len); |
3712b42d KK |
350 | hc->sendiov.iov_base = frame; |
351 | hc->sendiov.iov_len = len; | |
8c90e11e | 352 | len = kernel_sendmsg(socket, &hc->sendmsg, &hc->sendiov, 1, len); |
3712b42d KK |
353 | /* give socket back */ |
354 | hc->socket = socket; /* no locking required */ | |
355 | ||
356 | return len; | |
357 | } | |
358 | ||
359 | ||
360 | /* | |
361 | * receive channel data from socket | |
362 | */ | |
363 | static void | |
364 | l1oip_socket_recv(struct l1oip *hc, u8 remotecodec, u8 channel, u16 timebase, | |
475be4d8 | 365 | u8 *buf, int len) |
3712b42d KK |
366 | { |
367 | struct sk_buff *nskb; | |
368 | struct bchannel *bch; | |
369 | struct dchannel *dch; | |
370 | u8 *p; | |
371 | u32 rx_counter; | |
372 | ||
373 | if (len == 0) { | |
374 | if (debug & DEBUG_L1OIP_MSG) | |
375 | printk(KERN_DEBUG "%s: received empty keepalive data, " | |
475be4d8 | 376 | "ignoring\n", __func__); |
3712b42d KK |
377 | return; |
378 | } | |
379 | ||
380 | if (debug & DEBUG_L1OIP_MSG) | |
381 | printk(KERN_DEBUG "%s: received data, sending to mISDN (%d)\n", | |
475be4d8 | 382 | __func__, len); |
3712b42d KK |
383 | |
384 | if (channel < 1 || channel > 127) { | |
385 | printk(KERN_WARNING "%s: packet error - channel %d out of " | |
475be4d8 | 386 | "range\n", __func__, channel); |
3712b42d KK |
387 | return; |
388 | } | |
389 | dch = hc->chan[channel].dch; | |
390 | bch = hc->chan[channel].bch; | |
391 | if (!dch && !bch) { | |
392 | printk(KERN_WARNING "%s: packet error - channel %d not in " | |
475be4d8 | 393 | "stack\n", __func__, channel); |
3712b42d KK |
394 | return; |
395 | } | |
396 | ||
397 | /* prepare message */ | |
475be4d8 | 398 | nskb = mI_alloc_skb((remotecodec == 3) ? (len << 1) : len, GFP_ATOMIC); |
3712b42d KK |
399 | if (!nskb) { |
400 | printk(KERN_ERR "%s: No mem for skb.\n", __func__); | |
401 | return; | |
402 | } | |
475be4d8 | 403 | p = skb_put(nskb, (remotecodec == 3) ? (len << 1) : len); |
3712b42d KK |
404 | |
405 | if (remotecodec == 1 && ulaw) | |
406 | l1oip_alaw_to_ulaw(buf, len, p); | |
407 | else if (remotecodec == 2 && !ulaw) | |
408 | l1oip_ulaw_to_alaw(buf, len, p); | |
409 | else if (remotecodec == 3) | |
410 | len = l1oip_4bit_to_law(buf, len, p); | |
411 | else | |
412 | memcpy(p, buf, len); | |
413 | ||
414 | /* send message up */ | |
415 | if (dch && len >= 2) { | |
416 | dch->rx_skb = nskb; | |
417 | recv_Dchannel(dch); | |
418 | } | |
419 | if (bch) { | |
420 | /* expand 16 bit sequence number to 32 bit sequence number */ | |
421 | rx_counter = hc->chan[channel].rx_counter; | |
422 | if (((s16)(timebase - rx_counter)) >= 0) { | |
423 | /* time has changed forward */ | |
424 | if (timebase >= (rx_counter & 0xffff)) | |
425 | rx_counter = | |
426 | (rx_counter & 0xffff0000) | timebase; | |
427 | else | |
475be4d8 | 428 | rx_counter = ((rx_counter & 0xffff0000) + 0x10000) |
3712b42d KK |
429 | | timebase; |
430 | } else { | |
431 | /* time has changed backwards */ | |
432 | if (timebase < (rx_counter & 0xffff)) | |
433 | rx_counter = | |
434 | (rx_counter & 0xffff0000) | timebase; | |
435 | else | |
475be4d8 | 436 | rx_counter = ((rx_counter & 0xffff0000) - 0x10000) |
3712b42d KK |
437 | | timebase; |
438 | } | |
439 | hc->chan[channel].rx_counter = rx_counter; | |
440 | ||
441 | #ifdef REORDER_DEBUG | |
442 | if (hc->chan[channel].disorder_flag) { | |
443 | struct sk_buff *skb; | |
444 | int cnt; | |
445 | skb = hc->chan[channel].disorder_skb; | |
446 | hc->chan[channel].disorder_skb = nskb; | |
447 | nskb = skb; | |
448 | cnt = hc->chan[channel].disorder_cnt; | |
449 | hc->chan[channel].disorder_cnt = rx_counter; | |
450 | rx_counter = cnt; | |
451 | } | |
452 | hc->chan[channel].disorder_flag ^= 1; | |
453 | if (nskb) | |
454 | #endif | |
eac74af9 | 455 | queue_ch_frame(&bch->ch, PH_DATA_IND, rx_counter, nskb); |
3712b42d KK |
456 | } |
457 | } | |
458 | ||
459 | ||
460 | /* | |
461 | * parse frame and extract channel data | |
462 | */ | |
463 | static void | |
464 | l1oip_socket_parse(struct l1oip *hc, struct sockaddr_in *sin, u8 *buf, int len) | |
465 | { | |
863a76e5 | 466 | u32 packet_id; |
3712b42d KK |
467 | u8 channel; |
468 | u8 remotecodec; | |
469 | u16 timebase; | |
470 | int m, mlen; | |
471 | int len_start = len; /* initial frame length */ | |
472 | struct dchannel *dch = hc->chan[hc->d_idx].dch; | |
473 | ||
474 | if (debug & DEBUG_L1OIP_MSG) | |
475 | printk(KERN_DEBUG "%s: received frame, parsing... (%d)\n", | |
475be4d8 | 476 | __func__, len); |
3712b42d | 477 | |
1537a363 | 478 | /* check length */ |
475be4d8 | 479 | if (len < 1 + 1 + 2) { |
3712b42d | 480 | printk(KERN_WARNING "%s: packet error - length %d below " |
475be4d8 | 481 | "4 bytes\n", __func__, len); |
3712b42d KK |
482 | return; |
483 | } | |
484 | ||
485 | /* check version */ | |
475be4d8 | 486 | if (((*buf) >> 6) != L1OIP_VERSION) { |
3712b42d | 487 | printk(KERN_WARNING "%s: packet error - unknown version %d\n", |
475be4d8 | 488 | __func__, buf[0]>>6); |
3712b42d KK |
489 | return; |
490 | } | |
491 | ||
492 | /* check type */ | |
475be4d8 | 493 | if (((*buf) & 0x20) && !hc->pri) { |
3712b42d | 494 | printk(KERN_WARNING "%s: packet error - received E1 packet " |
475be4d8 | 495 | "on S0 interface\n", __func__); |
3712b42d KK |
496 | return; |
497 | } | |
475be4d8 | 498 | if (!((*buf) & 0x20) && hc->pri) { |
3712b42d | 499 | printk(KERN_WARNING "%s: packet error - received S0 packet " |
475be4d8 | 500 | "on E1 interface\n", __func__); |
3712b42d KK |
501 | return; |
502 | } | |
503 | ||
504 | /* get id flag */ | |
475be4d8 | 505 | packet_id = (*buf >> 4) & 1; |
3712b42d KK |
506 | |
507 | /* check coding */ | |
508 | remotecodec = (*buf) & 0x0f; | |
509 | if (remotecodec > 3) { | |
510 | printk(KERN_WARNING "%s: packet error - remotecodec %d " | |
475be4d8 | 511 | "unsupported\n", __func__, remotecodec); |
3712b42d KK |
512 | return; |
513 | } | |
514 | buf++; | |
515 | len--; | |
516 | ||
863a76e5 HE |
517 | /* check packet_id */ |
518 | if (packet_id) { | |
3712b42d KK |
519 | if (!hc->id) { |
520 | printk(KERN_WARNING "%s: packet error - packet has id " | |
475be4d8 | 521 | "0x%x, but we have not\n", __func__, packet_id); |
3712b42d KK |
522 | return; |
523 | } | |
524 | if (len < 4) { | |
525 | printk(KERN_WARNING "%s: packet error - packet too " | |
475be4d8 | 526 | "short for ID value\n", __func__); |
3712b42d KK |
527 | return; |
528 | } | |
863a76e5 HE |
529 | packet_id = (*buf++) << 24; |
530 | packet_id += (*buf++) << 16; | |
531 | packet_id += (*buf++) << 8; | |
532 | packet_id += (*buf++); | |
3712b42d KK |
533 | len -= 4; |
534 | ||
863a76e5 | 535 | if (packet_id != hc->id) { |
3712b42d | 536 | printk(KERN_WARNING "%s: packet error - ID mismatch, " |
475be4d8 JP |
537 | "got 0x%x, we 0x%x\n", |
538 | __func__, packet_id, hc->id); | |
3712b42d KK |
539 | return; |
540 | } | |
541 | } else { | |
542 | if (hc->id) { | |
543 | printk(KERN_WARNING "%s: packet error - packet has no " | |
475be4d8 | 544 | "ID, but we have\n", __func__); |
3712b42d KK |
545 | return; |
546 | } | |
547 | } | |
548 | ||
549 | multiframe: | |
550 | if (len < 1) { | |
551 | printk(KERN_WARNING "%s: packet error - packet too short, " | |
475be4d8 JP |
552 | "channel expected at position %d.\n", |
553 | __func__, len-len_start + 1); | |
3712b42d KK |
554 | return; |
555 | } | |
556 | ||
557 | /* get channel and multiframe flag */ | |
475be4d8 | 558 | channel = *buf & 0x7f; |
3712b42d KK |
559 | m = *buf >> 7; |
560 | buf++; | |
561 | len--; | |
562 | ||
563 | /* check length on multiframe */ | |
564 | if (m) { | |
565 | if (len < 1) { | |
566 | printk(KERN_WARNING "%s: packet error - packet too " | |
475be4d8 JP |
567 | "short, length expected at position %d.\n", |
568 | __func__, len_start - len - 1); | |
3712b42d KK |
569 | return; |
570 | } | |
571 | ||
572 | mlen = *buf++; | |
573 | len--; | |
574 | if (mlen == 0) | |
575 | mlen = 256; | |
475be4d8 | 576 | if (len < mlen + 3) { |
3712b42d | 577 | printk(KERN_WARNING "%s: packet error - length %d at " |
475be4d8 JP |
578 | "position %d exceeds total length %d.\n", |
579 | __func__, mlen, len_start-len - 1, len_start); | |
3712b42d KK |
580 | return; |
581 | } | |
475be4d8 | 582 | if (len == mlen + 3) { |
3712b42d | 583 | printk(KERN_WARNING "%s: packet error - length %d at " |
475be4d8 JP |
584 | "position %d will not allow additional " |
585 | "packet.\n", | |
586 | __func__, mlen, len_start-len + 1); | |
3712b42d KK |
587 | return; |
588 | } | |
589 | } else | |
475be4d8 | 590 | mlen = len - 2; /* single frame, subtract timebase */ |
3712b42d KK |
591 | |
592 | if (len < 2) { | |
593 | printk(KERN_WARNING "%s: packet error - packet too short, time " | |
475be4d8 JP |
594 | "base expected at position %d.\n", |
595 | __func__, len-len_start + 1); | |
3712b42d KK |
596 | return; |
597 | } | |
598 | ||
599 | /* get time base */ | |
600 | timebase = (*buf++) << 8; | |
601 | timebase |= (*buf++); | |
602 | len -= 2; | |
603 | ||
604 | /* if inactive, we send up a PH_ACTIVATE and activate */ | |
605 | if (!test_bit(FLG_ACTIVE, &dch->Flags)) { | |
475be4d8 | 606 | if (debug & (DEBUG_L1OIP_MSG | DEBUG_L1OIP_SOCKET)) |
3712b42d | 607 | printk(KERN_DEBUG "%s: interface become active due to " |
475be4d8 | 608 | "received packet\n", __func__); |
3712b42d KK |
609 | test_and_set_bit(FLG_ACTIVE, &dch->Flags); |
610 | _queue_data(&dch->dev.D, PH_ACTIVATE_IND, MISDN_ID_ANY, 0, | |
475be4d8 | 611 | NULL, GFP_ATOMIC); |
3712b42d KK |
612 | } |
613 | ||
614 | /* distribute packet */ | |
615 | l1oip_socket_recv(hc, remotecodec, channel, timebase, buf, mlen); | |
616 | buf += mlen; | |
617 | len -= mlen; | |
618 | ||
619 | /* multiframe */ | |
620 | if (m) | |
621 | goto multiframe; | |
622 | ||
623 | /* restart timer */ | |
0797fb08 | 624 | if (time_before(hc->timeout_tl.expires, jiffies + 5 * HZ) || !hc->timeout_on) { |
3712b42d | 625 | hc->timeout_on = 1; |
87f03cc3 | 626 | mod_timer(&hc->timeout_tl, jiffies + L1OIP_TIMEOUT * HZ); |
3712b42d | 627 | } else /* only adjust timer */ |
475be4d8 | 628 | hc->timeout_tl.expires = jiffies + L1OIP_TIMEOUT * HZ; |
3712b42d KK |
629 | |
630 | /* if ip or source port changes */ | |
631 | if ((hc->sin_remote.sin_addr.s_addr != sin->sin_addr.s_addr) | |
475be4d8 | 632 | || (hc->sin_remote.sin_port != sin->sin_port)) { |
3712b42d KK |
633 | if (debug & DEBUG_L1OIP_SOCKET) |
634 | printk(KERN_DEBUG "%s: remote address changes from " | |
475be4d8 JP |
635 | "0x%08x to 0x%08x (port %d to %d)\n", __func__, |
636 | ntohl(hc->sin_remote.sin_addr.s_addr), | |
637 | ntohl(sin->sin_addr.s_addr), | |
638 | ntohs(hc->sin_remote.sin_port), | |
639 | ntohs(sin->sin_port)); | |
3712b42d KK |
640 | hc->sin_remote.sin_addr.s_addr = sin->sin_addr.s_addr; |
641 | hc->sin_remote.sin_port = sin->sin_port; | |
642 | } | |
643 | } | |
644 | ||
645 | ||
646 | /* | |
647 | * socket stuff | |
648 | */ | |
649 | static int | |
650 | l1oip_socket_thread(void *data) | |
651 | { | |
652 | struct l1oip *hc = (struct l1oip *)data; | |
653 | int ret = 0; | |
654 | struct msghdr msg; | |
3712b42d | 655 | struct sockaddr_in sin_rx; |
3dc40393 FS |
656 | unsigned char *recvbuf; |
657 | size_t recvbuf_size = 1500; | |
3712b42d KK |
658 | int recvlen; |
659 | struct socket *socket = NULL; | |
01a1e7ec | 660 | DECLARE_COMPLETION_ONSTACK(wait); |
3712b42d | 661 | |
3dc40393 FS |
662 | /* allocate buffer memory */ |
663 | recvbuf = kmalloc(recvbuf_size, GFP_KERNEL); | |
664 | if (!recvbuf) { | |
665 | printk(KERN_ERR "%s: Failed to alloc recvbuf.\n", __func__); | |
666 | ret = -ENOMEM; | |
667 | goto fail; | |
668 | } | |
669 | ||
3712b42d KK |
670 | /* make daemon */ |
671 | allow_signal(SIGTERM); | |
672 | ||
673 | /* create socket */ | |
674 | if (sock_create(PF_INET, SOCK_DGRAM, IPPROTO_UDP, &socket)) { | |
675 | printk(KERN_ERR "%s: Failed to create socket.\n", __func__); | |
3dc40393 FS |
676 | ret = -EIO; |
677 | goto fail; | |
3712b42d KK |
678 | } |
679 | ||
680 | /* set incoming address */ | |
681 | hc->sin_local.sin_family = AF_INET; | |
682 | hc->sin_local.sin_addr.s_addr = INADDR_ANY; | |
683 | hc->sin_local.sin_port = htons((unsigned short)hc->localport); | |
684 | ||
685 | /* set outgoing address */ | |
686 | hc->sin_remote.sin_family = AF_INET; | |
687 | hc->sin_remote.sin_addr.s_addr = htonl(hc->remoteip); | |
688 | hc->sin_remote.sin_port = htons((unsigned short)hc->remoteport); | |
689 | ||
d82603c6 | 690 | /* bind to incoming port */ |
3712b42d | 691 | if (socket->ops->bind(socket, (struct sockaddr *)&hc->sin_local, |
475be4d8 | 692 | sizeof(hc->sin_local))) { |
3712b42d | 693 | printk(KERN_ERR "%s: Failed to bind socket to port %d.\n", |
475be4d8 | 694 | __func__, hc->localport); |
3712b42d KK |
695 | ret = -EINVAL; |
696 | goto fail; | |
697 | } | |
698 | ||
699 | /* check sk */ | |
700 | if (socket->sk == NULL) { | |
701 | printk(KERN_ERR "%s: socket->sk == NULL\n", __func__); | |
702 | ret = -EIO; | |
703 | goto fail; | |
704 | } | |
705 | ||
706 | /* build receive message */ | |
707 | msg.msg_name = &sin_rx; | |
708 | msg.msg_namelen = sizeof(sin_rx); | |
709 | msg.msg_control = NULL; | |
710 | msg.msg_controllen = 0; | |
3712b42d KK |
711 | |
712 | /* build send message */ | |
713 | hc->sendmsg.msg_name = &hc->sin_remote; | |
714 | hc->sendmsg.msg_namelen = sizeof(hc->sin_remote); | |
715 | hc->sendmsg.msg_control = NULL; | |
716 | hc->sendmsg.msg_controllen = 0; | |
3712b42d KK |
717 | |
718 | /* give away socket */ | |
719 | spin_lock(&hc->socket_lock); | |
720 | hc->socket = socket; | |
721 | spin_unlock(&hc->socket_lock); | |
722 | ||
723 | /* read loop */ | |
724 | if (debug & DEBUG_L1OIP_SOCKET) | |
725 | printk(KERN_DEBUG "%s: socket created and open\n", | |
475be4d8 | 726 | __func__); |
3712b42d | 727 | while (!signal_pending(current)) { |
8c90e11e ACM |
728 | struct kvec iov = { |
729 | .iov_base = recvbuf, | |
b564afcf | 730 | .iov_len = recvbuf_size, |
8c90e11e ACM |
731 | }; |
732 | recvlen = kernel_recvmsg(socket, &msg, &iov, 1, | |
b564afcf | 733 | recvbuf_size, 0); |
3712b42d KK |
734 | if (recvlen > 0) { |
735 | l1oip_socket_parse(hc, &sin_rx, recvbuf, recvlen); | |
736 | } else { | |
737 | if (debug & DEBUG_L1OIP_SOCKET) | |
eac74af9 | 738 | printk(KERN_WARNING |
475be4d8 | 739 | "%s: broken pipe on socket\n", __func__); |
3712b42d KK |
740 | } |
741 | } | |
742 | ||
743 | /* get socket back, check first if in use, maybe by send function */ | |
744 | spin_lock(&hc->socket_lock); | |
745 | /* if hc->socket is NULL, it is in use until it is given back */ | |
746 | while (!hc->socket) { | |
747 | spin_unlock(&hc->socket_lock); | |
475be4d8 | 748 | schedule_timeout(HZ / 10); |
3712b42d KK |
749 | spin_lock(&hc->socket_lock); |
750 | } | |
751 | hc->socket = NULL; | |
752 | spin_unlock(&hc->socket_lock); | |
753 | ||
754 | if (debug & DEBUG_L1OIP_SOCKET) | |
755 | printk(KERN_DEBUG "%s: socket thread terminating\n", | |
475be4d8 | 756 | __func__); |
3712b42d KK |
757 | |
758 | fail: | |
3dc40393 FS |
759 | /* free recvbuf */ |
760 | kfree(recvbuf); | |
761 | ||
3712b42d KK |
762 | /* close socket */ |
763 | if (socket) | |
764 | sock_release(socket); | |
765 | ||
766 | /* if we got killed, signal completion */ | |
767 | complete(&hc->socket_complete); | |
768 | hc->socket_thread = NULL; /* show termination of thread */ | |
769 | ||
770 | if (debug & DEBUG_L1OIP_SOCKET) | |
771 | printk(KERN_DEBUG "%s: socket thread terminated\n", | |
475be4d8 | 772 | __func__); |
3712b42d KK |
773 | return ret; |
774 | } | |
775 | ||
776 | static void | |
777 | l1oip_socket_close(struct l1oip *hc) | |
778 | { | |
1b4d3312 AE |
779 | struct dchannel *dch = hc->chan[hc->d_idx].dch; |
780 | ||
3712b42d KK |
781 | /* kill thread */ |
782 | if (hc->socket_thread) { | |
783 | if (debug & DEBUG_L1OIP_SOCKET) | |
784 | printk(KERN_DEBUG "%s: socket thread exists, " | |
475be4d8 | 785 | "killing...\n", __func__); |
3712b42d KK |
786 | send_sig(SIGTERM, hc->socket_thread, 0); |
787 | wait_for_completion(&hc->socket_complete); | |
788 | } | |
1b4d3312 AE |
789 | |
790 | /* if active, we send up a PH_DEACTIVATE and deactivate */ | |
791 | if (test_bit(FLG_ACTIVE, &dch->Flags)) { | |
475be4d8 | 792 | if (debug & (DEBUG_L1OIP_MSG | DEBUG_L1OIP_SOCKET)) |
1b4d3312 | 793 | printk(KERN_DEBUG "%s: interface become deactivated " |
475be4d8 | 794 | "due to timeout\n", __func__); |
1b4d3312 AE |
795 | test_and_clear_bit(FLG_ACTIVE, &dch->Flags); |
796 | _queue_data(&dch->dev.D, PH_DEACTIVATE_IND, MISDN_ID_ANY, 0, | |
475be4d8 | 797 | NULL, GFP_ATOMIC); |
1b4d3312 | 798 | } |
3712b42d KK |
799 | } |
800 | ||
801 | static int | |
802 | l1oip_socket_open(struct l1oip *hc) | |
803 | { | |
804 | /* in case of reopen, we need to close first */ | |
805 | l1oip_socket_close(hc); | |
806 | ||
807 | init_completion(&hc->socket_complete); | |
808 | ||
809 | /* create receive process */ | |
810 | hc->socket_thread = kthread_run(l1oip_socket_thread, hc, "l1oip_%s", | |
475be4d8 | 811 | hc->name); |
3712b42d KK |
812 | if (IS_ERR(hc->socket_thread)) { |
813 | int err = PTR_ERR(hc->socket_thread); | |
814 | printk(KERN_ERR "%s: Failed (%d) to create socket process.\n", | |
475be4d8 | 815 | __func__, err); |
3712b42d KK |
816 | hc->socket_thread = NULL; |
817 | sock_release(hc->socket); | |
818 | return err; | |
819 | } | |
820 | if (debug & DEBUG_L1OIP_SOCKET) | |
821 | printk(KERN_DEBUG "%s: socket thread created\n", __func__); | |
822 | ||
823 | return 0; | |
824 | } | |
825 | ||
826 | ||
827 | static void | |
828 | l1oip_send_bh(struct work_struct *work) | |
829 | { | |
830 | struct l1oip *hc = container_of(work, struct l1oip, workq); | |
831 | ||
475be4d8 | 832 | if (debug & (DEBUG_L1OIP_MSG | DEBUG_L1OIP_SOCKET)) |
3712b42d | 833 | printk(KERN_DEBUG "%s: keepalive timer expired, sending empty " |
475be4d8 | 834 | "frame on dchannel\n", __func__); |
3712b42d KK |
835 | |
836 | /* send an empty l1oip frame at D-channel */ | |
837 | l1oip_socket_send(hc, 0, hc->d_idx, 0, 0, NULL, 0); | |
838 | } | |
839 | ||
840 | ||
841 | /* | |
842 | * timer stuff | |
843 | */ | |
844 | static void | |
845 | l1oip_keepalive(void *data) | |
846 | { | |
847 | struct l1oip *hc = (struct l1oip *)data; | |
848 | ||
849 | schedule_work(&hc->workq); | |
850 | } | |
851 | ||
852 | static void | |
853 | l1oip_timeout(void *data) | |
854 | { | |
855 | struct l1oip *hc = (struct l1oip *)data; | |
856 | struct dchannel *dch = hc->chan[hc->d_idx].dch; | |
857 | ||
858 | if (debug & DEBUG_L1OIP_MSG) | |
859 | printk(KERN_DEBUG "%s: timeout timer expired, turn layer one " | |
475be4d8 | 860 | "down.\n", __func__); |
3712b42d KK |
861 | |
862 | hc->timeout_on = 0; /* state that timer must be initialized next time */ | |
863 | ||
864 | /* if timeout, we send up a PH_DEACTIVATE and deactivate */ | |
865 | if (test_bit(FLG_ACTIVE, &dch->Flags)) { | |
475be4d8 | 866 | if (debug & (DEBUG_L1OIP_MSG | DEBUG_L1OIP_SOCKET)) |
3712b42d | 867 | printk(KERN_DEBUG "%s: interface become deactivated " |
475be4d8 | 868 | "due to timeout\n", __func__); |
3712b42d KK |
869 | test_and_clear_bit(FLG_ACTIVE, &dch->Flags); |
870 | _queue_data(&dch->dev.D, PH_DEACTIVATE_IND, MISDN_ID_ANY, 0, | |
475be4d8 | 871 | NULL, GFP_ATOMIC); |
3712b42d KK |
872 | } |
873 | ||
874 | /* if we have ondemand set, we remove ip address */ | |
875 | if (hc->ondemand) { | |
876 | if (debug & DEBUG_L1OIP_MSG) | |
877 | printk(KERN_DEBUG "%s: on demand causes ip address to " | |
475be4d8 | 878 | "be removed\n", __func__); |
3712b42d KK |
879 | hc->sin_remote.sin_addr.s_addr = 0; |
880 | } | |
881 | } | |
882 | ||
883 | ||
884 | /* | |
885 | * message handling | |
886 | */ | |
887 | static int | |
888 | handle_dmsg(struct mISDNchannel *ch, struct sk_buff *skb) | |
889 | { | |
890 | struct mISDNdevice *dev = container_of(ch, struct mISDNdevice, D); | |
891 | struct dchannel *dch = container_of(dev, struct dchannel, dev); | |
892 | struct l1oip *hc = dch->hw; | |
893 | struct mISDNhead *hh = mISDN_HEAD_P(skb); | |
894 | int ret = -EINVAL; | |
895 | int l, ll; | |
896 | unsigned char *p; | |
897 | ||
898 | switch (hh->prim) { | |
899 | case PH_DATA_REQ: | |
900 | if (skb->len < 1) { | |
901 | printk(KERN_WARNING "%s: skb too small\n", | |
475be4d8 | 902 | __func__); |
3712b42d KK |
903 | break; |
904 | } | |
905 | if (skb->len > MAX_DFRAME_LEN_L1 || skb->len > L1OIP_MAX_LEN) { | |
906 | printk(KERN_WARNING "%s: skb too large\n", | |
475be4d8 | 907 | __func__); |
3712b42d KK |
908 | break; |
909 | } | |
910 | /* send frame */ | |
911 | p = skb->data; | |
912 | l = skb->len; | |
913 | while (l) { | |
eac74af9 | 914 | ll = (l < L1OIP_MAX_PERFRAME) ? l : L1OIP_MAX_PERFRAME; |
3712b42d | 915 | l1oip_socket_send(hc, 0, dch->slot, 0, |
475be4d8 | 916 | hc->chan[dch->slot].tx_counter++, p, ll); |
3712b42d KK |
917 | p += ll; |
918 | l -= ll; | |
919 | } | |
920 | skb_trim(skb, 0); | |
921 | queue_ch_frame(ch, PH_DATA_CNF, hh->id, skb); | |
922 | return 0; | |
923 | case PH_ACTIVATE_REQ: | |
475be4d8 | 924 | if (debug & (DEBUG_L1OIP_MSG | DEBUG_L1OIP_SOCKET)) |
3712b42d | 925 | printk(KERN_DEBUG "%s: PH_ACTIVATE channel %d (1..%d)\n" |
475be4d8 | 926 | , __func__, dch->slot, hc->b_num + 1); |
3712b42d KK |
927 | skb_trim(skb, 0); |
928 | if (test_bit(FLG_ACTIVE, &dch->Flags)) | |
929 | queue_ch_frame(ch, PH_ACTIVATE_IND, hh->id, skb); | |
930 | else | |
931 | queue_ch_frame(ch, PH_DEACTIVATE_IND, hh->id, skb); | |
932 | return 0; | |
933 | case PH_DEACTIVATE_REQ: | |
475be4d8 | 934 | if (debug & (DEBUG_L1OIP_MSG | DEBUG_L1OIP_SOCKET)) |
3712b42d | 935 | printk(KERN_DEBUG "%s: PH_DEACTIVATE channel %d " |
475be4d8 JP |
936 | "(1..%d)\n", __func__, dch->slot, |
937 | hc->b_num + 1); | |
3712b42d KK |
938 | skb_trim(skb, 0); |
939 | if (test_bit(FLG_ACTIVE, &dch->Flags)) | |
940 | queue_ch_frame(ch, PH_ACTIVATE_IND, hh->id, skb); | |
941 | else | |
942 | queue_ch_frame(ch, PH_DEACTIVATE_IND, hh->id, skb); | |
943 | return 0; | |
944 | } | |
945 | if (!ret) | |
946 | dev_kfree_skb(skb); | |
947 | return ret; | |
948 | } | |
949 | ||
950 | static int | |
951 | channel_dctrl(struct dchannel *dch, struct mISDN_ctrl_req *cq) | |
952 | { | |
953 | int ret = 0; | |
954 | struct l1oip *hc = dch->hw; | |
955 | ||
956 | switch (cq->op) { | |
957 | case MISDN_CTRL_GETOP: | |
1b4d3312 AE |
958 | cq->op = MISDN_CTRL_SETPEER | MISDN_CTRL_UNSETPEER |
959 | | MISDN_CTRL_GETPEER; | |
3712b42d KK |
960 | break; |
961 | case MISDN_CTRL_SETPEER: | |
962 | hc->remoteip = (u32)cq->p1; | |
963 | hc->remoteport = cq->p2 & 0xffff; | |
964 | hc->localport = cq->p2 >> 16; | |
965 | if (!hc->remoteport) | |
966 | hc->remoteport = hc->localport; | |
967 | if (debug & DEBUG_L1OIP_SOCKET) | |
968 | printk(KERN_DEBUG "%s: got new ip address from user " | |
475be4d8 | 969 | "space.\n", __func__); |
f7df0b8d | 970 | l1oip_socket_open(hc); |
3712b42d KK |
971 | break; |
972 | case MISDN_CTRL_UNSETPEER: | |
973 | if (debug & DEBUG_L1OIP_SOCKET) | |
974 | printk(KERN_DEBUG "%s: removing ip address.\n", | |
475be4d8 | 975 | __func__); |
3712b42d KK |
976 | hc->remoteip = 0; |
977 | l1oip_socket_open(hc); | |
978 | break; | |
1b4d3312 AE |
979 | case MISDN_CTRL_GETPEER: |
980 | if (debug & DEBUG_L1OIP_SOCKET) | |
981 | printk(KERN_DEBUG "%s: getting ip address.\n", | |
475be4d8 | 982 | __func__); |
1b36c78f | 983 | cq->p1 = hc->remoteip; |
1b4d3312 AE |
984 | cq->p2 = hc->remoteport | (hc->localport << 16); |
985 | break; | |
3712b42d KK |
986 | default: |
987 | printk(KERN_WARNING "%s: unknown Op %x\n", | |
475be4d8 | 988 | __func__, cq->op); |
3712b42d KK |
989 | ret = -EINVAL; |
990 | break; | |
991 | } | |
992 | return ret; | |
993 | } | |
994 | ||
995 | static int | |
996 | open_dchannel(struct l1oip *hc, struct dchannel *dch, struct channel_req *rq) | |
997 | { | |
998 | if (debug & DEBUG_HW_OPEN) | |
999 | printk(KERN_DEBUG "%s: dev(%d) open from %p\n", __func__, | |
475be4d8 | 1000 | dch->dev.id, __builtin_return_address(0)); |
3712b42d KK |
1001 | if (rq->protocol == ISDN_P_NONE) |
1002 | return -EINVAL; | |
1003 | if ((dch->dev.D.protocol != ISDN_P_NONE) && | |
1004 | (dch->dev.D.protocol != rq->protocol)) { | |
1005 | if (debug & DEBUG_HW_OPEN) | |
1006 | printk(KERN_WARNING "%s: change protocol %x to %x\n", | |
475be4d8 | 1007 | __func__, dch->dev.D.protocol, rq->protocol); |
3712b42d KK |
1008 | } |
1009 | if (dch->dev.D.protocol != rq->protocol) | |
1010 | dch->dev.D.protocol = rq->protocol; | |
1011 | ||
1012 | if (test_bit(FLG_ACTIVE, &dch->Flags)) { | |
1013 | _queue_data(&dch->dev.D, PH_ACTIVATE_IND, MISDN_ID_ANY, | |
475be4d8 | 1014 | 0, NULL, GFP_KERNEL); |
3712b42d KK |
1015 | } |
1016 | rq->ch = &dch->dev.D; | |
1017 | if (!try_module_get(THIS_MODULE)) | |
1018 | printk(KERN_WARNING "%s:cannot get module\n", __func__); | |
1019 | return 0; | |
1020 | } | |
1021 | ||
1022 | static int | |
1023 | open_bchannel(struct l1oip *hc, struct dchannel *dch, struct channel_req *rq) | |
1024 | { | |
1025 | struct bchannel *bch; | |
1026 | int ch; | |
1027 | ||
ff4cc1de | 1028 | if (!test_channelmap(rq->adr.channel, dch->dev.channelmap)) |
3712b42d KK |
1029 | return -EINVAL; |
1030 | if (rq->protocol == ISDN_P_NONE) | |
1031 | return -EINVAL; | |
1032 | ch = rq->adr.channel; /* BRI: 1=B1 2=B2 PRI: 1..15,17.. */ | |
1033 | bch = hc->chan[ch].bch; | |
1034 | if (!bch) { | |
1035 | printk(KERN_ERR "%s:internal error ch %d has no bch\n", | |
475be4d8 | 1036 | __func__, ch); |
3712b42d KK |
1037 | return -EINVAL; |
1038 | } | |
1039 | if (test_and_set_bit(FLG_OPEN, &bch->Flags)) | |
1040 | return -EBUSY; /* b-channel can be only open once */ | |
1041 | bch->ch.protocol = rq->protocol; | |
1042 | rq->ch = &bch->ch; | |
1043 | if (!try_module_get(THIS_MODULE)) | |
1044 | printk(KERN_WARNING "%s:cannot get module\n", __func__); | |
1045 | return 0; | |
1046 | } | |
1047 | ||
1048 | static int | |
1049 | l1oip_dctrl(struct mISDNchannel *ch, u_int cmd, void *arg) | |
1050 | { | |
1051 | struct mISDNdevice *dev = container_of(ch, struct mISDNdevice, D); | |
1052 | struct dchannel *dch = container_of(dev, struct dchannel, dev); | |
1053 | struct l1oip *hc = dch->hw; | |
1054 | struct channel_req *rq; | |
1055 | int err = 0; | |
1056 | ||
1057 | if (dch->debug & DEBUG_HW) | |
1058 | printk(KERN_DEBUG "%s: cmd:%x %p\n", | |
475be4d8 | 1059 | __func__, cmd, arg); |
3712b42d KK |
1060 | switch (cmd) { |
1061 | case OPEN_CHANNEL: | |
1062 | rq = arg; | |
1063 | switch (rq->protocol) { | |
1064 | case ISDN_P_TE_S0: | |
1065 | case ISDN_P_NT_S0: | |
1066 | if (hc->pri) { | |
1067 | err = -EINVAL; | |
1068 | break; | |
1069 | } | |
1070 | err = open_dchannel(hc, dch, rq); | |
1071 | break; | |
1072 | case ISDN_P_TE_E1: | |
1073 | case ISDN_P_NT_E1: | |
1074 | if (!hc->pri) { | |
1075 | err = -EINVAL; | |
1076 | break; | |
1077 | } | |
1078 | err = open_dchannel(hc, dch, rq); | |
1079 | break; | |
1080 | default: | |
1081 | err = open_bchannel(hc, dch, rq); | |
1082 | } | |
1083 | break; | |
1084 | case CLOSE_CHANNEL: | |
1085 | if (debug & DEBUG_HW_OPEN) | |
1086 | printk(KERN_DEBUG "%s: dev(%d) close from %p\n", | |
475be4d8 JP |
1087 | __func__, dch->dev.id, |
1088 | __builtin_return_address(0)); | |
3712b42d KK |
1089 | module_put(THIS_MODULE); |
1090 | break; | |
1091 | case CONTROL_CHANNEL: | |
1092 | err = channel_dctrl(dch, arg); | |
1093 | break; | |
1094 | default: | |
1095 | if (dch->debug & DEBUG_HW) | |
1096 | printk(KERN_DEBUG "%s: unknown command %x\n", | |
475be4d8 | 1097 | __func__, cmd); |
3712b42d KK |
1098 | err = -EINVAL; |
1099 | } | |
1100 | return err; | |
1101 | } | |
1102 | ||
1103 | static int | |
1104 | handle_bmsg(struct mISDNchannel *ch, struct sk_buff *skb) | |
1105 | { | |
1106 | struct bchannel *bch = container_of(ch, struct bchannel, ch); | |
1107 | struct l1oip *hc = bch->hw; | |
1108 | int ret = -EINVAL; | |
1109 | struct mISDNhead *hh = mISDN_HEAD_P(skb); | |
b5d5843a | 1110 | int l, ll; |
3712b42d KK |
1111 | unsigned char *p; |
1112 | ||
1113 | switch (hh->prim) { | |
1114 | case PH_DATA_REQ: | |
1115 | if (skb->len <= 0) { | |
1116 | printk(KERN_WARNING "%s: skb too small\n", | |
475be4d8 | 1117 | __func__); |
3712b42d KK |
1118 | break; |
1119 | } | |
1120 | if (skb->len > MAX_DFRAME_LEN_L1 || skb->len > L1OIP_MAX_LEN) { | |
1121 | printk(KERN_WARNING "%s: skb too large\n", | |
475be4d8 | 1122 | __func__); |
3712b42d KK |
1123 | break; |
1124 | } | |
1125 | /* check for AIS / ulaw-silence */ | |
3712b42d | 1126 | l = skb->len; |
b5d5843a | 1127 | if (!memchr_inv(skb->data, 0xff, l)) { |
3712b42d KK |
1128 | if (debug & DEBUG_L1OIP_MSG) |
1129 | printk(KERN_DEBUG "%s: got AIS, not sending, " | |
475be4d8 | 1130 | "but counting\n", __func__); |
3712b42d KK |
1131 | hc->chan[bch->slot].tx_counter += l; |
1132 | skb_trim(skb, 0); | |
1133 | queue_ch_frame(ch, PH_DATA_CNF, hh->id, skb); | |
1134 | return 0; | |
1135 | } | |
1136 | /* check for silence */ | |
3712b42d | 1137 | l = skb->len; |
b5d5843a | 1138 | if (!memchr_inv(skb->data, 0x2a, l)) { |
3712b42d KK |
1139 | if (debug & DEBUG_L1OIP_MSG) |
1140 | printk(KERN_DEBUG "%s: got silence, not sending" | |
475be4d8 | 1141 | ", but counting\n", __func__); |
3712b42d KK |
1142 | hc->chan[bch->slot].tx_counter += l; |
1143 | skb_trim(skb, 0); | |
1144 | queue_ch_frame(ch, PH_DATA_CNF, hh->id, skb); | |
1145 | return 0; | |
1146 | } | |
1147 | ||
1148 | /* send frame */ | |
1149 | p = skb->data; | |
1150 | l = skb->len; | |
1151 | while (l) { | |
eac74af9 | 1152 | ll = (l < L1OIP_MAX_PERFRAME) ? l : L1OIP_MAX_PERFRAME; |
3712b42d | 1153 | l1oip_socket_send(hc, hc->codec, bch->slot, 0, |
475be4d8 | 1154 | hc->chan[bch->slot].tx_counter, p, ll); |
3712b42d KK |
1155 | hc->chan[bch->slot].tx_counter += ll; |
1156 | p += ll; | |
1157 | l -= ll; | |
1158 | } | |
1159 | skb_trim(skb, 0); | |
1160 | queue_ch_frame(ch, PH_DATA_CNF, hh->id, skb); | |
1161 | return 0; | |
1162 | case PH_ACTIVATE_REQ: | |
475be4d8 | 1163 | if (debug & (DEBUG_L1OIP_MSG | DEBUG_L1OIP_SOCKET)) |
3712b42d | 1164 | printk(KERN_DEBUG "%s: PH_ACTIVATE channel %d (1..%d)\n" |
475be4d8 | 1165 | , __func__, bch->slot, hc->b_num + 1); |
3712b42d KK |
1166 | hc->chan[bch->slot].codecstate = 0; |
1167 | test_and_set_bit(FLG_ACTIVE, &bch->Flags); | |
1168 | skb_trim(skb, 0); | |
1169 | queue_ch_frame(ch, PH_ACTIVATE_IND, hh->id, skb); | |
1170 | return 0; | |
1171 | case PH_DEACTIVATE_REQ: | |
475be4d8 | 1172 | if (debug & (DEBUG_L1OIP_MSG | DEBUG_L1OIP_SOCKET)) |
3712b42d | 1173 | printk(KERN_DEBUG "%s: PH_DEACTIVATE channel %d " |
475be4d8 JP |
1174 | "(1..%d)\n", __func__, bch->slot, |
1175 | hc->b_num + 1); | |
3712b42d KK |
1176 | test_and_clear_bit(FLG_ACTIVE, &bch->Flags); |
1177 | skb_trim(skb, 0); | |
1178 | queue_ch_frame(ch, PH_DEACTIVATE_IND, hh->id, skb); | |
1179 | return 0; | |
1180 | } | |
1181 | if (!ret) | |
1182 | dev_kfree_skb(skb); | |
1183 | return ret; | |
1184 | } | |
1185 | ||
1186 | static int | |
1187 | channel_bctrl(struct bchannel *bch, struct mISDN_ctrl_req *cq) | |
1188 | { | |
1189 | int ret = 0; | |
1190 | struct dsp_features *features = | |
1191 | (struct dsp_features *)(*((u_long *)&cq->p1)); | |
1192 | ||
1193 | switch (cq->op) { | |
1194 | case MISDN_CTRL_GETOP: | |
1195 | cq->op = MISDN_CTRL_HW_FEATURES_OP; | |
1196 | break; | |
1197 | case MISDN_CTRL_HW_FEATURES: /* fill features structure */ | |
1198 | if (debug & DEBUG_L1OIP_MSG) | |
1199 | printk(KERN_DEBUG "%s: HW_FEATURE request\n", | |
475be4d8 | 1200 | __func__); |
3712b42d KK |
1201 | /* create confirm */ |
1202 | features->unclocked = 1; | |
1203 | features->unordered = 1; | |
1204 | break; | |
1205 | default: | |
1206 | printk(KERN_WARNING "%s: unknown Op %x\n", | |
475be4d8 | 1207 | __func__, cq->op); |
3712b42d KK |
1208 | ret = -EINVAL; |
1209 | break; | |
1210 | } | |
1211 | return ret; | |
1212 | } | |
1213 | ||
1214 | static int | |
1215 | l1oip_bctrl(struct mISDNchannel *ch, u_int cmd, void *arg) | |
1216 | { | |
1217 | struct bchannel *bch = container_of(ch, struct bchannel, ch); | |
1218 | int err = -EINVAL; | |
1219 | ||
1220 | if (bch->debug & DEBUG_HW) | |
1221 | printk(KERN_DEBUG "%s: cmd:%x %p\n", | |
475be4d8 | 1222 | __func__, cmd, arg); |
3712b42d KK |
1223 | switch (cmd) { |
1224 | case CLOSE_CHANNEL: | |
1225 | test_and_clear_bit(FLG_OPEN, &bch->Flags); | |
1226 | test_and_clear_bit(FLG_ACTIVE, &bch->Flags); | |
1227 | ch->protocol = ISDN_P_NONE; | |
1228 | ch->peer = NULL; | |
1229 | module_put(THIS_MODULE); | |
1230 | err = 0; | |
1231 | break; | |
1232 | case CONTROL_CHANNEL: | |
1233 | err = channel_bctrl(bch, arg); | |
1234 | break; | |
1235 | default: | |
1236 | printk(KERN_WARNING "%s: unknown prim(%x)\n", | |
475be4d8 | 1237 | __func__, cmd); |
3712b42d KK |
1238 | } |
1239 | return err; | |
1240 | } | |
1241 | ||
1242 | ||
1243 | /* | |
1244 | * cleanup module and stack | |
1245 | */ | |
1246 | static void | |
1247 | release_card(struct l1oip *hc) | |
1248 | { | |
1249 | int ch; | |
1250 | ||
1251 | if (timer_pending(&hc->keep_tl)) | |
1252 | del_timer(&hc->keep_tl); | |
1253 | ||
1254 | if (timer_pending(&hc->timeout_tl)) | |
1255 | del_timer(&hc->timeout_tl); | |
1256 | ||
0d26aa70 TH |
1257 | cancel_work_sync(&hc->workq); |
1258 | ||
3712b42d KK |
1259 | if (hc->socket_thread) |
1260 | l1oip_socket_close(hc); | |
1261 | ||
1262 | if (hc->registered && hc->chan[hc->d_idx].dch) | |
1263 | mISDN_unregister_device(&hc->chan[hc->d_idx].dch->dev); | |
1264 | for (ch = 0; ch < 128; ch++) { | |
1265 | if (hc->chan[ch].dch) { | |
1266 | mISDN_freedchannel(hc->chan[ch].dch); | |
1267 | kfree(hc->chan[ch].dch); | |
1268 | } | |
1269 | if (hc->chan[ch].bch) { | |
1270 | mISDN_freebchannel(hc->chan[ch].bch); | |
1271 | kfree(hc->chan[ch].bch); | |
1272 | #ifdef REORDER_DEBUG | |
1273 | if (hc->chan[ch].disorder_skb) | |
1274 | dev_kfree_skb(hc->chan[ch].disorder_skb); | |
1275 | #endif | |
1276 | } | |
1277 | } | |
1278 | ||
1279 | spin_lock(&l1oip_lock); | |
1280 | list_del(&hc->list); | |
1281 | spin_unlock(&l1oip_lock); | |
1282 | ||
1283 | kfree(hc); | |
1284 | } | |
1285 | ||
1286 | static void | |
1287 | l1oip_cleanup(void) | |
1288 | { | |
1289 | struct l1oip *hc, *next; | |
1290 | ||
1291 | list_for_each_entry_safe(hc, next, &l1oip_ilist, list) | |
1292 | release_card(hc); | |
1293 | ||
1294 | l1oip_4bit_free(); | |
1295 | } | |
1296 | ||
1297 | ||
1298 | /* | |
1299 | * module and stack init | |
1300 | */ | |
1301 | static int | |
1302 | init_card(struct l1oip *hc, int pri, int bundle) | |
1303 | { | |
1304 | struct dchannel *dch; | |
1305 | struct bchannel *bch; | |
1306 | int ret; | |
1307 | int i, ch; | |
1308 | ||
1309 | spin_lock_init(&hc->socket_lock); | |
1310 | hc->idx = l1oip_cnt; | |
1311 | hc->pri = pri; | |
eac74af9 KK |
1312 | hc->d_idx = pri ? 16 : 3; |
1313 | hc->b_num = pri ? 30 : 2; | |
3712b42d KK |
1314 | hc->bundle = bundle; |
1315 | if (hc->pri) | |
1316 | sprintf(hc->name, "l1oip-e1.%d", l1oip_cnt + 1); | |
1317 | else | |
1318 | sprintf(hc->name, "l1oip-s0.%d", l1oip_cnt + 1); | |
1319 | ||
1320 | switch (codec[l1oip_cnt]) { | |
1321 | case 0: /* as is */ | |
1322 | case 1: /* alaw */ | |
1323 | case 2: /* ulaw */ | |
1324 | case 3: /* 4bit */ | |
1325 | break; | |
1326 | default: | |
1327 | printk(KERN_ERR "Codec(%d) not supported.\n", | |
475be4d8 | 1328 | codec[l1oip_cnt]); |
3712b42d KK |
1329 | return -EINVAL; |
1330 | } | |
1331 | hc->codec = codec[l1oip_cnt]; | |
1332 | if (debug & DEBUG_L1OIP_INIT) | |
1333 | printk(KERN_DEBUG "%s: using codec %d\n", | |
475be4d8 | 1334 | __func__, hc->codec); |
3712b42d KK |
1335 | |
1336 | if (id[l1oip_cnt] == 0) { | |
1337 | printk(KERN_WARNING "Warning: No 'id' value given or " | |
475be4d8 | 1338 | "0, this is highly unsecure. Please use 32 " |
6774def6 | 1339 | "bit random number 0x...\n"); |
3712b42d KK |
1340 | } |
1341 | hc->id = id[l1oip_cnt]; | |
1342 | if (debug & DEBUG_L1OIP_INIT) | |
1343 | printk(KERN_DEBUG "%s: using id 0x%x\n", __func__, hc->id); | |
1344 | ||
1345 | hc->ondemand = ondemand[l1oip_cnt]; | |
1346 | if (hc->ondemand && !hc->id) { | |
1347 | printk(KERN_ERR "%s: ondemand option only allowed in " | |
475be4d8 | 1348 | "conjunction with non 0 ID\n", __func__); |
3712b42d KK |
1349 | return -EINVAL; |
1350 | } | |
1351 | ||
1352 | if (limit[l1oip_cnt]) | |
1353 | hc->b_num = limit[l1oip_cnt]; | |
1354 | if (!pri && hc->b_num > 2) { | |
1355 | printk(KERN_ERR "Maximum limit for BRI interface is 2 " | |
475be4d8 | 1356 | "channels.\n"); |
3712b42d KK |
1357 | return -EINVAL; |
1358 | } | |
1359 | if (pri && hc->b_num > 126) { | |
1360 | printk(KERN_ERR "Maximum limit for PRI interface is 126 " | |
475be4d8 | 1361 | "channels.\n"); |
3712b42d KK |
1362 | return -EINVAL; |
1363 | } | |
1364 | if (pri && hc->b_num > 30) { | |
1365 | printk(KERN_WARNING "Maximum limit for BRI interface is 30 " | |
475be4d8 | 1366 | "channels.\n"); |
3712b42d | 1367 | printk(KERN_WARNING "Your selection of %d channels must be " |
475be4d8 | 1368 | "supported by application.\n", hc->limit); |
3712b42d KK |
1369 | } |
1370 | ||
475be4d8 JP |
1371 | hc->remoteip = ip[l1oip_cnt << 2] << 24 |
1372 | | ip[(l1oip_cnt << 2) + 1] << 16 | |
1373 | | ip[(l1oip_cnt << 2) + 2] << 8 | |
1374 | | ip[(l1oip_cnt << 2) + 3]; | |
1375 | hc->localport = port[l1oip_cnt]?:(L1OIP_DEFAULTPORT + l1oip_cnt); | |
3712b42d KK |
1376 | if (remoteport[l1oip_cnt]) |
1377 | hc->remoteport = remoteport[l1oip_cnt]; | |
1378 | else | |
1379 | hc->remoteport = hc->localport; | |
1380 | if (debug & DEBUG_L1OIP_INIT) | |
1381 | printk(KERN_DEBUG "%s: using local port %d remote ip " | |
475be4d8 JP |
1382 | "%d.%d.%d.%d port %d ondemand %d\n", __func__, |
1383 | hc->localport, hc->remoteip >> 24, | |
1384 | (hc->remoteip >> 16) & 0xff, | |
1385 | (hc->remoteip >> 8) & 0xff, hc->remoteip & 0xff, | |
1386 | hc->remoteport, hc->ondemand); | |
3712b42d KK |
1387 | |
1388 | dch = kzalloc(sizeof(struct dchannel), GFP_KERNEL); | |
1389 | if (!dch) | |
1390 | return -ENOMEM; | |
1391 | dch->debug = debug; | |
1392 | mISDN_initdchannel(dch, MAX_DFRAME_LEN_L1, NULL); | |
1393 | dch->hw = hc; | |
1394 | if (pri) | |
1395 | dch->dev.Dprotocols = (1 << ISDN_P_TE_E1) | (1 << ISDN_P_NT_E1); | |
1396 | else | |
1397 | dch->dev.Dprotocols = (1 << ISDN_P_TE_S0) | (1 << ISDN_P_NT_S0); | |
1398 | dch->dev.Bprotocols = (1 << (ISDN_P_B_RAW & ISDN_P_B_MASK)) | | |
475be4d8 | 1399 | (1 << (ISDN_P_B_HDLC & ISDN_P_B_MASK)); |
3712b42d KK |
1400 | dch->dev.D.send = handle_dmsg; |
1401 | dch->dev.D.ctrl = l1oip_dctrl; | |
1402 | dch->dev.nrbchan = hc->b_num; | |
1403 | dch->slot = hc->d_idx; | |
1404 | hc->chan[hc->d_idx].dch = dch; | |
1405 | i = 1; | |
1406 | for (ch = 0; ch < dch->dev.nrbchan; ch++) { | |
1407 | if (ch == 15) | |
1408 | i++; | |
1409 | bch = kzalloc(sizeof(struct bchannel), GFP_KERNEL); | |
1410 | if (!bch) { | |
1411 | printk(KERN_ERR "%s: no memory for bchannel\n", | |
475be4d8 | 1412 | __func__); |
3712b42d KK |
1413 | return -ENOMEM; |
1414 | } | |
1415 | bch->nr = i + ch; | |
1416 | bch->slot = i + ch; | |
1417 | bch->debug = debug; | |
034005a0 | 1418 | mISDN_initbchannel(bch, MAX_DATA_MEM, 0); |
3712b42d KK |
1419 | bch->hw = hc; |
1420 | bch->ch.send = handle_bmsg; | |
1421 | bch->ch.ctrl = l1oip_bctrl; | |
1422 | bch->ch.nr = i + ch; | |
1423 | list_add(&bch->ch.list, &dch->dev.bchannels); | |
1424 | hc->chan[i + ch].bch = bch; | |
ff4cc1de | 1425 | set_channelmap(bch->nr, dch->dev.channelmap); |
3712b42d | 1426 | } |
b36b654a MU |
1427 | /* TODO: create a parent device for this driver */ |
1428 | ret = mISDN_register_device(&dch->dev, NULL, hc->name); | |
3712b42d KK |
1429 | if (ret) |
1430 | return ret; | |
1431 | hc->registered = 1; | |
1432 | ||
1433 | if (debug & DEBUG_L1OIP_INIT) | |
1434 | printk(KERN_DEBUG "%s: Setting up network card(%d)\n", | |
475be4d8 | 1435 | __func__, l1oip_cnt + 1); |
3712b42d KK |
1436 | ret = l1oip_socket_open(hc); |
1437 | if (ret) | |
1438 | return ret; | |
1439 | ||
1440 | hc->keep_tl.function = (void *)l1oip_keepalive; | |
1441 | hc->keep_tl.data = (ulong)hc; | |
1442 | init_timer(&hc->keep_tl); | |
475be4d8 | 1443 | hc->keep_tl.expires = jiffies + 2 * HZ; /* two seconds first time */ |
3712b42d KK |
1444 | add_timer(&hc->keep_tl); |
1445 | ||
aff55a36 | 1446 | setup_timer(&hc->timeout_tl, (void *)l1oip_timeout, (ulong)hc); |
3712b42d KK |
1447 | hc->timeout_on = 0; /* state that we have timer off */ |
1448 | ||
1449 | return 0; | |
1450 | } | |
1451 | ||
1452 | static int __init | |
1453 | l1oip_init(void) | |
1454 | { | |
1455 | int pri, bundle; | |
1456 | struct l1oip *hc; | |
1457 | int ret; | |
1458 | ||
1459 | printk(KERN_INFO "mISDN: Layer-1-over-IP driver Rev. %s\n", | |
475be4d8 | 1460 | l1oip_revision); |
3712b42d KK |
1461 | |
1462 | INIT_LIST_HEAD(&l1oip_ilist); | |
1463 | spin_lock_init(&l1oip_lock); | |
1464 | ||
1465 | if (l1oip_4bit_alloc(ulaw)) | |
1466 | return -ENOMEM; | |
1467 | ||
1468 | l1oip_cnt = 0; | |
9bfdac94 | 1469 | while (l1oip_cnt < MAX_CARDS && type[l1oip_cnt]) { |
3712b42d KK |
1470 | switch (type[l1oip_cnt] & 0xff) { |
1471 | case 1: | |
1472 | pri = 0; | |
1473 | bundle = 0; | |
1474 | break; | |
1475 | case 2: | |
1476 | pri = 1; | |
1477 | bundle = 0; | |
1478 | break; | |
1479 | case 3: | |
1480 | pri = 0; | |
1481 | bundle = 1; | |
1482 | break; | |
1483 | case 4: | |
1484 | pri = 1; | |
1485 | bundle = 1; | |
1486 | break; | |
1487 | default: | |
1488 | printk(KERN_ERR "Card type(%d) not supported.\n", | |
475be4d8 | 1489 | type[l1oip_cnt] & 0xff); |
3712b42d KK |
1490 | l1oip_cleanup(); |
1491 | return -EINVAL; | |
1492 | } | |
1493 | ||
1494 | if (debug & DEBUG_L1OIP_INIT) | |
1495 | printk(KERN_DEBUG "%s: interface %d is %s with %s.\n", | |
475be4d8 JP |
1496 | __func__, l1oip_cnt, pri ? "PRI" : "BRI", |
1497 | bundle ? "bundled IP packet for all B-channels" : | |
1498 | "separate IP packets for every B-channel"); | |
3712b42d KK |
1499 | |
1500 | hc = kzalloc(sizeof(struct l1oip), GFP_ATOMIC); | |
1501 | if (!hc) { | |
1502 | printk(KERN_ERR "No kmem for L1-over-IP driver.\n"); | |
1503 | l1oip_cleanup(); | |
1504 | return -ENOMEM; | |
1505 | } | |
1506 | INIT_WORK(&hc->workq, (void *)l1oip_send_bh); | |
1507 | ||
1508 | spin_lock(&l1oip_lock); | |
1509 | list_add_tail(&hc->list, &l1oip_ilist); | |
1510 | spin_unlock(&l1oip_lock); | |
1511 | ||
1512 | ret = init_card(hc, pri, bundle); | |
1513 | if (ret) { | |
1514 | l1oip_cleanup(); | |
1515 | return ret; | |
1516 | } | |
1517 | ||
1518 | l1oip_cnt++; | |
1519 | } | |
1520 | printk(KERN_INFO "%d virtual devices registered\n", l1oip_cnt); | |
1521 | return 0; | |
1522 | } | |
1523 | ||
1524 | module_init(l1oip_init); | |
1525 | module_exit(l1oip_cleanup); |