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> |
3712b42d KK |
237 | #include <net/sock.h> |
238 | #include "core.h" | |
239 | #include "l1oip.h" | |
240 | ||
241 | static const char *l1oip_revision = "2.00"; | |
242 | ||
243 | static int l1oip_cnt; | |
244 | static spinlock_t l1oip_lock; | |
245 | static struct list_head l1oip_ilist; | |
246 | ||
247 | #define MAX_CARDS 16 | |
248 | static u_int type[MAX_CARDS]; | |
249 | static u_int codec[MAX_CARDS]; | |
475be4d8 | 250 | static u_int ip[MAX_CARDS * 4]; |
3712b42d KK |
251 | static u_int port[MAX_CARDS]; |
252 | static u_int remoteport[MAX_CARDS]; | |
253 | static u_int ondemand[MAX_CARDS]; | |
254 | static u_int limit[MAX_CARDS]; | |
255 | static u_int id[MAX_CARDS]; | |
256 | static int debug; | |
257 | static int ulaw; | |
258 | ||
259 | MODULE_AUTHOR("Andreas Eversberg"); | |
260 | MODULE_LICENSE("GPL"); | |
261 | module_param_array(type, uint, NULL, S_IRUGO | S_IWUSR); | |
262 | module_param_array(codec, uint, NULL, S_IRUGO | S_IWUSR); | |
263 | module_param_array(ip, uint, NULL, S_IRUGO | S_IWUSR); | |
264 | module_param_array(port, uint, NULL, S_IRUGO | S_IWUSR); | |
265 | module_param_array(remoteport, uint, NULL, S_IRUGO | S_IWUSR); | |
266 | module_param_array(ondemand, uint, NULL, S_IRUGO | S_IWUSR); | |
267 | module_param_array(limit, uint, NULL, S_IRUGO | S_IWUSR); | |
268 | module_param_array(id, uint, NULL, S_IRUGO | S_IWUSR); | |
269 | module_param(ulaw, uint, S_IRUGO | S_IWUSR); | |
270 | module_param(debug, uint, S_IRUGO | S_IWUSR); | |
271 | ||
272 | /* | |
273 | * send a frame via socket, if open and restart timer | |
274 | */ | |
275 | static int | |
276 | l1oip_socket_send(struct l1oip *hc, u8 localcodec, u8 channel, u32 chanmask, | |
475be4d8 | 277 | u16 timebase, u8 *buf, int len) |
3712b42d KK |
278 | { |
279 | u8 *p; | |
475be4d8 | 280 | u8 frame[len + 32]; |
3712b42d | 281 | struct socket *socket = NULL; |
3712b42d KK |
282 | |
283 | if (debug & DEBUG_L1OIP_MSG) | |
284 | printk(KERN_DEBUG "%s: sending data to socket (len = %d)\n", | |
475be4d8 | 285 | __func__, len); |
3712b42d KK |
286 | |
287 | p = frame; | |
288 | ||
289 | /* restart timer */ | |
87f03cc3 MS |
290 | if (time_before(hc->keep_tl.expires, jiffies + 5 * HZ)) |
291 | mod_timer(&hc->keep_tl, jiffies + L1OIP_KEEPALIVE * HZ); | |
292 | else | |
475be4d8 | 293 | hc->keep_tl.expires = jiffies + L1OIP_KEEPALIVE * HZ; |
3712b42d KK |
294 | |
295 | if (debug & DEBUG_L1OIP_MSG) | |
296 | printk(KERN_DEBUG "%s: resetting timer\n", __func__); | |
297 | ||
298 | /* drop if we have no remote ip or port */ | |
299 | if (!hc->sin_remote.sin_addr.s_addr || !hc->sin_remote.sin_port) { | |
300 | if (debug & DEBUG_L1OIP_MSG) | |
301 | printk(KERN_DEBUG "%s: dropping frame, because remote " | |
475be4d8 | 302 | "IP is not set.\n", __func__); |
3712b42d KK |
303 | return len; |
304 | } | |
305 | ||
306 | /* assemble frame */ | |
475be4d8 JP |
307 | *p++ = (L1OIP_VERSION << 6) /* version and coding */ |
308 | | (hc->pri ? 0x20 : 0x00) /* type */ | |
309 | | (hc->id ? 0x10 : 0x00) /* id */ | |
310 | | localcodec; | |
3712b42d | 311 | if (hc->id) { |
475be4d8 JP |
312 | *p++ = hc->id >> 24; /* id */ |
313 | *p++ = hc->id >> 16; | |
314 | *p++ = hc->id >> 8; | |
3712b42d KK |
315 | *p++ = hc->id; |
316 | } | |
0f15b151 | 317 | *p++ = 0x00 + channel; /* m-flag, channel */ |
475be4d8 | 318 | *p++ = timebase >> 8; /* time base */ |
3712b42d KK |
319 | *p++ = timebase; |
320 | ||
321 | if (buf && len) { /* add data to frame */ | |
322 | if (localcodec == 1 && ulaw) | |
323 | l1oip_ulaw_to_alaw(buf, len, p); | |
324 | else if (localcodec == 2 && !ulaw) | |
325 | l1oip_alaw_to_ulaw(buf, len, p); | |
326 | else if (localcodec == 3) | |
327 | len = l1oip_law_to_4bit(buf, len, p, | |
475be4d8 | 328 | &hc->chan[channel].codecstate); |
3712b42d KK |
329 | else |
330 | memcpy(p, buf, len); | |
331 | } | |
332 | len += p - frame; | |
333 | ||
334 | /* check for socket in safe condition */ | |
335 | spin_lock(&hc->socket_lock); | |
336 | if (!hc->socket) { | |
337 | spin_unlock(&hc->socket_lock); | |
338 | return 0; | |
339 | } | |
340 | /* seize socket */ | |
341 | socket = hc->socket; | |
342 | hc->socket = NULL; | |
343 | spin_unlock(&hc->socket_lock); | |
344 | /* send packet */ | |
345 | if (debug & DEBUG_L1OIP_MSG) | |
346 | printk(KERN_DEBUG "%s: sending packet to socket (len " | |
475be4d8 | 347 | "= %d)\n", __func__, len); |
3712b42d KK |
348 | hc->sendiov.iov_base = frame; |
349 | hc->sendiov.iov_len = len; | |
8c90e11e | 350 | len = kernel_sendmsg(socket, &hc->sendmsg, &hc->sendiov, 1, len); |
3712b42d KK |
351 | /* give socket back */ |
352 | hc->socket = socket; /* no locking required */ | |
353 | ||
354 | return len; | |
355 | } | |
356 | ||
357 | ||
358 | /* | |
359 | * receive channel data from socket | |
360 | */ | |
361 | static void | |
362 | l1oip_socket_recv(struct l1oip *hc, u8 remotecodec, u8 channel, u16 timebase, | |
475be4d8 | 363 | u8 *buf, int len) |
3712b42d KK |
364 | { |
365 | struct sk_buff *nskb; | |
366 | struct bchannel *bch; | |
367 | struct dchannel *dch; | |
368 | u8 *p; | |
369 | u32 rx_counter; | |
370 | ||
371 | if (len == 0) { | |
372 | if (debug & DEBUG_L1OIP_MSG) | |
373 | printk(KERN_DEBUG "%s: received empty keepalive data, " | |
475be4d8 | 374 | "ignoring\n", __func__); |
3712b42d KK |
375 | return; |
376 | } | |
377 | ||
378 | if (debug & DEBUG_L1OIP_MSG) | |
379 | printk(KERN_DEBUG "%s: received data, sending to mISDN (%d)\n", | |
475be4d8 | 380 | __func__, len); |
3712b42d KK |
381 | |
382 | if (channel < 1 || channel > 127) { | |
383 | printk(KERN_WARNING "%s: packet error - channel %d out of " | |
475be4d8 | 384 | "range\n", __func__, channel); |
3712b42d KK |
385 | return; |
386 | } | |
387 | dch = hc->chan[channel].dch; | |
388 | bch = hc->chan[channel].bch; | |
389 | if (!dch && !bch) { | |
390 | printk(KERN_WARNING "%s: packet error - channel %d not in " | |
475be4d8 | 391 | "stack\n", __func__, channel); |
3712b42d KK |
392 | return; |
393 | } | |
394 | ||
395 | /* prepare message */ | |
475be4d8 | 396 | nskb = mI_alloc_skb((remotecodec == 3) ? (len << 1) : len, GFP_ATOMIC); |
3712b42d KK |
397 | if (!nskb) { |
398 | printk(KERN_ERR "%s: No mem for skb.\n", __func__); | |
399 | return; | |
400 | } | |
475be4d8 | 401 | p = skb_put(nskb, (remotecodec == 3) ? (len << 1) : len); |
3712b42d KK |
402 | |
403 | if (remotecodec == 1 && ulaw) | |
404 | l1oip_alaw_to_ulaw(buf, len, p); | |
405 | else if (remotecodec == 2 && !ulaw) | |
406 | l1oip_ulaw_to_alaw(buf, len, p); | |
407 | else if (remotecodec == 3) | |
408 | len = l1oip_4bit_to_law(buf, len, p); | |
409 | else | |
410 | memcpy(p, buf, len); | |
411 | ||
412 | /* send message up */ | |
413 | if (dch && len >= 2) { | |
414 | dch->rx_skb = nskb; | |
415 | recv_Dchannel(dch); | |
416 | } | |
417 | if (bch) { | |
418 | /* expand 16 bit sequence number to 32 bit sequence number */ | |
419 | rx_counter = hc->chan[channel].rx_counter; | |
420 | if (((s16)(timebase - rx_counter)) >= 0) { | |
421 | /* time has changed forward */ | |
422 | if (timebase >= (rx_counter & 0xffff)) | |
423 | rx_counter = | |
424 | (rx_counter & 0xffff0000) | timebase; | |
425 | else | |
475be4d8 | 426 | rx_counter = ((rx_counter & 0xffff0000) + 0x10000) |
3712b42d KK |
427 | | timebase; |
428 | } else { | |
429 | /* time has changed backwards */ | |
430 | if (timebase < (rx_counter & 0xffff)) | |
431 | rx_counter = | |
432 | (rx_counter & 0xffff0000) | timebase; | |
433 | else | |
475be4d8 | 434 | rx_counter = ((rx_counter & 0xffff0000) - 0x10000) |
3712b42d KK |
435 | | timebase; |
436 | } | |
437 | hc->chan[channel].rx_counter = rx_counter; | |
438 | ||
439 | #ifdef REORDER_DEBUG | |
440 | if (hc->chan[channel].disorder_flag) { | |
441 | struct sk_buff *skb; | |
442 | int cnt; | |
443 | skb = hc->chan[channel].disorder_skb; | |
444 | hc->chan[channel].disorder_skb = nskb; | |
445 | nskb = skb; | |
446 | cnt = hc->chan[channel].disorder_cnt; | |
447 | hc->chan[channel].disorder_cnt = rx_counter; | |
448 | rx_counter = cnt; | |
449 | } | |
450 | hc->chan[channel].disorder_flag ^= 1; | |
451 | if (nskb) | |
452 | #endif | |
eac74af9 | 453 | queue_ch_frame(&bch->ch, PH_DATA_IND, rx_counter, nskb); |
3712b42d KK |
454 | } |
455 | } | |
456 | ||
457 | ||
458 | /* | |
459 | * parse frame and extract channel data | |
460 | */ | |
461 | static void | |
462 | l1oip_socket_parse(struct l1oip *hc, struct sockaddr_in *sin, u8 *buf, int len) | |
463 | { | |
863a76e5 | 464 | u32 packet_id; |
3712b42d KK |
465 | u8 channel; |
466 | u8 remotecodec; | |
467 | u16 timebase; | |
468 | int m, mlen; | |
469 | int len_start = len; /* initial frame length */ | |
470 | struct dchannel *dch = hc->chan[hc->d_idx].dch; | |
471 | ||
472 | if (debug & DEBUG_L1OIP_MSG) | |
473 | printk(KERN_DEBUG "%s: received frame, parsing... (%d)\n", | |
475be4d8 | 474 | __func__, len); |
3712b42d | 475 | |
1537a363 | 476 | /* check length */ |
475be4d8 | 477 | if (len < 1 + 1 + 2) { |
3712b42d | 478 | printk(KERN_WARNING "%s: packet error - length %d below " |
475be4d8 | 479 | "4 bytes\n", __func__, len); |
3712b42d KK |
480 | return; |
481 | } | |
482 | ||
483 | /* check version */ | |
475be4d8 | 484 | if (((*buf) >> 6) != L1OIP_VERSION) { |
3712b42d | 485 | printk(KERN_WARNING "%s: packet error - unknown version %d\n", |
475be4d8 | 486 | __func__, buf[0]>>6); |
3712b42d KK |
487 | return; |
488 | } | |
489 | ||
490 | /* check type */ | |
475be4d8 | 491 | if (((*buf) & 0x20) && !hc->pri) { |
3712b42d | 492 | printk(KERN_WARNING "%s: packet error - received E1 packet " |
475be4d8 | 493 | "on S0 interface\n", __func__); |
3712b42d KK |
494 | return; |
495 | } | |
475be4d8 | 496 | if (!((*buf) & 0x20) && hc->pri) { |
3712b42d | 497 | printk(KERN_WARNING "%s: packet error - received S0 packet " |
475be4d8 | 498 | "on E1 interface\n", __func__); |
3712b42d KK |
499 | return; |
500 | } | |
501 | ||
502 | /* get id flag */ | |
475be4d8 | 503 | packet_id = (*buf >> 4) & 1; |
3712b42d KK |
504 | |
505 | /* check coding */ | |
506 | remotecodec = (*buf) & 0x0f; | |
507 | if (remotecodec > 3) { | |
508 | printk(KERN_WARNING "%s: packet error - remotecodec %d " | |
475be4d8 | 509 | "unsupported\n", __func__, remotecodec); |
3712b42d KK |
510 | return; |
511 | } | |
512 | buf++; | |
513 | len--; | |
514 | ||
863a76e5 HE |
515 | /* check packet_id */ |
516 | if (packet_id) { | |
3712b42d KK |
517 | if (!hc->id) { |
518 | printk(KERN_WARNING "%s: packet error - packet has id " | |
475be4d8 | 519 | "0x%x, but we have not\n", __func__, packet_id); |
3712b42d KK |
520 | return; |
521 | } | |
522 | if (len < 4) { | |
523 | printk(KERN_WARNING "%s: packet error - packet too " | |
475be4d8 | 524 | "short for ID value\n", __func__); |
3712b42d KK |
525 | return; |
526 | } | |
863a76e5 HE |
527 | packet_id = (*buf++) << 24; |
528 | packet_id += (*buf++) << 16; | |
529 | packet_id += (*buf++) << 8; | |
530 | packet_id += (*buf++); | |
3712b42d KK |
531 | len -= 4; |
532 | ||
863a76e5 | 533 | if (packet_id != hc->id) { |
3712b42d | 534 | printk(KERN_WARNING "%s: packet error - ID mismatch, " |
475be4d8 JP |
535 | "got 0x%x, we 0x%x\n", |
536 | __func__, packet_id, hc->id); | |
3712b42d KK |
537 | return; |
538 | } | |
539 | } else { | |
540 | if (hc->id) { | |
541 | printk(KERN_WARNING "%s: packet error - packet has no " | |
475be4d8 | 542 | "ID, but we have\n", __func__); |
3712b42d KK |
543 | return; |
544 | } | |
545 | } | |
546 | ||
547 | multiframe: | |
548 | if (len < 1) { | |
549 | printk(KERN_WARNING "%s: packet error - packet too short, " | |
475be4d8 JP |
550 | "channel expected at position %d.\n", |
551 | __func__, len-len_start + 1); | |
3712b42d KK |
552 | return; |
553 | } | |
554 | ||
555 | /* get channel and multiframe flag */ | |
475be4d8 | 556 | channel = *buf & 0x7f; |
3712b42d KK |
557 | m = *buf >> 7; |
558 | buf++; | |
559 | len--; | |
560 | ||
561 | /* check length on multiframe */ | |
562 | if (m) { | |
563 | if (len < 1) { | |
564 | printk(KERN_WARNING "%s: packet error - packet too " | |
475be4d8 JP |
565 | "short, length expected at position %d.\n", |
566 | __func__, len_start - len - 1); | |
3712b42d KK |
567 | return; |
568 | } | |
569 | ||
570 | mlen = *buf++; | |
571 | len--; | |
572 | if (mlen == 0) | |
573 | mlen = 256; | |
475be4d8 | 574 | if (len < mlen + 3) { |
3712b42d | 575 | printk(KERN_WARNING "%s: packet error - length %d at " |
475be4d8 JP |
576 | "position %d exceeds total length %d.\n", |
577 | __func__, mlen, len_start-len - 1, len_start); | |
3712b42d KK |
578 | return; |
579 | } | |
475be4d8 | 580 | if (len == mlen + 3) { |
3712b42d | 581 | printk(KERN_WARNING "%s: packet error - length %d at " |
475be4d8 JP |
582 | "position %d will not allow additional " |
583 | "packet.\n", | |
584 | __func__, mlen, len_start-len + 1); | |
3712b42d KK |
585 | return; |
586 | } | |
587 | } else | |
475be4d8 | 588 | mlen = len - 2; /* single frame, subtract timebase */ |
3712b42d KK |
589 | |
590 | if (len < 2) { | |
591 | printk(KERN_WARNING "%s: packet error - packet too short, time " | |
475be4d8 JP |
592 | "base expected at position %d.\n", |
593 | __func__, len-len_start + 1); | |
3712b42d KK |
594 | return; |
595 | } | |
596 | ||
597 | /* get time base */ | |
598 | timebase = (*buf++) << 8; | |
599 | timebase |= (*buf++); | |
600 | len -= 2; | |
601 | ||
602 | /* if inactive, we send up a PH_ACTIVATE and activate */ | |
603 | if (!test_bit(FLG_ACTIVE, &dch->Flags)) { | |
475be4d8 | 604 | if (debug & (DEBUG_L1OIP_MSG | DEBUG_L1OIP_SOCKET)) |
3712b42d | 605 | printk(KERN_DEBUG "%s: interface become active due to " |
475be4d8 | 606 | "received packet\n", __func__); |
3712b42d KK |
607 | test_and_set_bit(FLG_ACTIVE, &dch->Flags); |
608 | _queue_data(&dch->dev.D, PH_ACTIVATE_IND, MISDN_ID_ANY, 0, | |
475be4d8 | 609 | NULL, GFP_ATOMIC); |
3712b42d KK |
610 | } |
611 | ||
612 | /* distribute packet */ | |
613 | l1oip_socket_recv(hc, remotecodec, channel, timebase, buf, mlen); | |
614 | buf += mlen; | |
615 | len -= mlen; | |
616 | ||
617 | /* multiframe */ | |
618 | if (m) | |
619 | goto multiframe; | |
620 | ||
621 | /* restart timer */ | |
0797fb08 | 622 | if (time_before(hc->timeout_tl.expires, jiffies + 5 * HZ) || !hc->timeout_on) { |
3712b42d | 623 | hc->timeout_on = 1; |
87f03cc3 | 624 | mod_timer(&hc->timeout_tl, jiffies + L1OIP_TIMEOUT * HZ); |
3712b42d | 625 | } else /* only adjust timer */ |
475be4d8 | 626 | hc->timeout_tl.expires = jiffies + L1OIP_TIMEOUT * HZ; |
3712b42d KK |
627 | |
628 | /* if ip or source port changes */ | |
629 | if ((hc->sin_remote.sin_addr.s_addr != sin->sin_addr.s_addr) | |
475be4d8 | 630 | || (hc->sin_remote.sin_port != sin->sin_port)) { |
3712b42d KK |
631 | if (debug & DEBUG_L1OIP_SOCKET) |
632 | printk(KERN_DEBUG "%s: remote address changes from " | |
475be4d8 JP |
633 | "0x%08x to 0x%08x (port %d to %d)\n", __func__, |
634 | ntohl(hc->sin_remote.sin_addr.s_addr), | |
635 | ntohl(sin->sin_addr.s_addr), | |
636 | ntohs(hc->sin_remote.sin_port), | |
637 | ntohs(sin->sin_port)); | |
3712b42d KK |
638 | hc->sin_remote.sin_addr.s_addr = sin->sin_addr.s_addr; |
639 | hc->sin_remote.sin_port = sin->sin_port; | |
640 | } | |
641 | } | |
642 | ||
643 | ||
644 | /* | |
645 | * socket stuff | |
646 | */ | |
647 | static int | |
648 | l1oip_socket_thread(void *data) | |
649 | { | |
650 | struct l1oip *hc = (struct l1oip *)data; | |
651 | int ret = 0; | |
652 | struct msghdr msg; | |
3712b42d | 653 | struct sockaddr_in sin_rx; |
3dc40393 FS |
654 | unsigned char *recvbuf; |
655 | size_t recvbuf_size = 1500; | |
3712b42d KK |
656 | int recvlen; |
657 | struct socket *socket = NULL; | |
01a1e7ec | 658 | DECLARE_COMPLETION_ONSTACK(wait); |
3712b42d | 659 | |
3dc40393 FS |
660 | /* allocate buffer memory */ |
661 | recvbuf = kmalloc(recvbuf_size, GFP_KERNEL); | |
662 | if (!recvbuf) { | |
663 | printk(KERN_ERR "%s: Failed to alloc recvbuf.\n", __func__); | |
664 | ret = -ENOMEM; | |
665 | goto fail; | |
666 | } | |
667 | ||
3712b42d KK |
668 | /* make daemon */ |
669 | allow_signal(SIGTERM); | |
670 | ||
671 | /* create socket */ | |
672 | if (sock_create(PF_INET, SOCK_DGRAM, IPPROTO_UDP, &socket)) { | |
673 | printk(KERN_ERR "%s: Failed to create socket.\n", __func__); | |
3dc40393 FS |
674 | ret = -EIO; |
675 | goto fail; | |
3712b42d KK |
676 | } |
677 | ||
678 | /* set incoming address */ | |
679 | hc->sin_local.sin_family = AF_INET; | |
680 | hc->sin_local.sin_addr.s_addr = INADDR_ANY; | |
681 | hc->sin_local.sin_port = htons((unsigned short)hc->localport); | |
682 | ||
683 | /* set outgoing address */ | |
684 | hc->sin_remote.sin_family = AF_INET; | |
685 | hc->sin_remote.sin_addr.s_addr = htonl(hc->remoteip); | |
686 | hc->sin_remote.sin_port = htons((unsigned short)hc->remoteport); | |
687 | ||
d82603c6 | 688 | /* bind to incoming port */ |
3712b42d | 689 | if (socket->ops->bind(socket, (struct sockaddr *)&hc->sin_local, |
475be4d8 | 690 | sizeof(hc->sin_local))) { |
3712b42d | 691 | printk(KERN_ERR "%s: Failed to bind socket to port %d.\n", |
475be4d8 | 692 | __func__, hc->localport); |
3712b42d KK |
693 | ret = -EINVAL; |
694 | goto fail; | |
695 | } | |
696 | ||
697 | /* check sk */ | |
698 | if (socket->sk == NULL) { | |
699 | printk(KERN_ERR "%s: socket->sk == NULL\n", __func__); | |
700 | ret = -EIO; | |
701 | goto fail; | |
702 | } | |
703 | ||
704 | /* build receive message */ | |
705 | msg.msg_name = &sin_rx; | |
706 | msg.msg_namelen = sizeof(sin_rx); | |
707 | msg.msg_control = NULL; | |
708 | msg.msg_controllen = 0; | |
3712b42d KK |
709 | |
710 | /* build send message */ | |
711 | hc->sendmsg.msg_name = &hc->sin_remote; | |
712 | hc->sendmsg.msg_namelen = sizeof(hc->sin_remote); | |
713 | hc->sendmsg.msg_control = NULL; | |
714 | hc->sendmsg.msg_controllen = 0; | |
3712b42d KK |
715 | |
716 | /* give away socket */ | |
717 | spin_lock(&hc->socket_lock); | |
718 | hc->socket = socket; | |
719 | spin_unlock(&hc->socket_lock); | |
720 | ||
721 | /* read loop */ | |
722 | if (debug & DEBUG_L1OIP_SOCKET) | |
723 | printk(KERN_DEBUG "%s: socket created and open\n", | |
475be4d8 | 724 | __func__); |
3712b42d | 725 | while (!signal_pending(current)) { |
8c90e11e ACM |
726 | struct kvec iov = { |
727 | .iov_base = recvbuf, | |
b564afcf | 728 | .iov_len = recvbuf_size, |
8c90e11e ACM |
729 | }; |
730 | recvlen = kernel_recvmsg(socket, &msg, &iov, 1, | |
b564afcf | 731 | recvbuf_size, 0); |
3712b42d KK |
732 | if (recvlen > 0) { |
733 | l1oip_socket_parse(hc, &sin_rx, recvbuf, recvlen); | |
734 | } else { | |
735 | if (debug & DEBUG_L1OIP_SOCKET) | |
eac74af9 | 736 | printk(KERN_WARNING |
475be4d8 | 737 | "%s: broken pipe on socket\n", __func__); |
3712b42d KK |
738 | } |
739 | } | |
740 | ||
741 | /* get socket back, check first if in use, maybe by send function */ | |
742 | spin_lock(&hc->socket_lock); | |
743 | /* if hc->socket is NULL, it is in use until it is given back */ | |
744 | while (!hc->socket) { | |
745 | spin_unlock(&hc->socket_lock); | |
475be4d8 | 746 | schedule_timeout(HZ / 10); |
3712b42d KK |
747 | spin_lock(&hc->socket_lock); |
748 | } | |
749 | hc->socket = NULL; | |
750 | spin_unlock(&hc->socket_lock); | |
751 | ||
752 | if (debug & DEBUG_L1OIP_SOCKET) | |
753 | printk(KERN_DEBUG "%s: socket thread terminating\n", | |
475be4d8 | 754 | __func__); |
3712b42d KK |
755 | |
756 | fail: | |
3dc40393 FS |
757 | /* free recvbuf */ |
758 | kfree(recvbuf); | |
759 | ||
3712b42d KK |
760 | /* close socket */ |
761 | if (socket) | |
762 | sock_release(socket); | |
763 | ||
764 | /* if we got killed, signal completion */ | |
765 | complete(&hc->socket_complete); | |
766 | hc->socket_thread = NULL; /* show termination of thread */ | |
767 | ||
768 | if (debug & DEBUG_L1OIP_SOCKET) | |
769 | printk(KERN_DEBUG "%s: socket thread terminated\n", | |
475be4d8 | 770 | __func__); |
3712b42d KK |
771 | return ret; |
772 | } | |
773 | ||
774 | static void | |
775 | l1oip_socket_close(struct l1oip *hc) | |
776 | { | |
1b4d3312 AE |
777 | struct dchannel *dch = hc->chan[hc->d_idx].dch; |
778 | ||
3712b42d KK |
779 | /* kill thread */ |
780 | if (hc->socket_thread) { | |
781 | if (debug & DEBUG_L1OIP_SOCKET) | |
782 | printk(KERN_DEBUG "%s: socket thread exists, " | |
475be4d8 | 783 | "killing...\n", __func__); |
3712b42d KK |
784 | send_sig(SIGTERM, hc->socket_thread, 0); |
785 | wait_for_completion(&hc->socket_complete); | |
786 | } | |
1b4d3312 AE |
787 | |
788 | /* if active, we send up a PH_DEACTIVATE and deactivate */ | |
789 | if (test_bit(FLG_ACTIVE, &dch->Flags)) { | |
475be4d8 | 790 | if (debug & (DEBUG_L1OIP_MSG | DEBUG_L1OIP_SOCKET)) |
1b4d3312 | 791 | printk(KERN_DEBUG "%s: interface become deactivated " |
475be4d8 | 792 | "due to timeout\n", __func__); |
1b4d3312 AE |
793 | test_and_clear_bit(FLG_ACTIVE, &dch->Flags); |
794 | _queue_data(&dch->dev.D, PH_DEACTIVATE_IND, MISDN_ID_ANY, 0, | |
475be4d8 | 795 | NULL, GFP_ATOMIC); |
1b4d3312 | 796 | } |
3712b42d KK |
797 | } |
798 | ||
799 | static int | |
800 | l1oip_socket_open(struct l1oip *hc) | |
801 | { | |
802 | /* in case of reopen, we need to close first */ | |
803 | l1oip_socket_close(hc); | |
804 | ||
805 | init_completion(&hc->socket_complete); | |
806 | ||
807 | /* create receive process */ | |
808 | hc->socket_thread = kthread_run(l1oip_socket_thread, hc, "l1oip_%s", | |
475be4d8 | 809 | hc->name); |
3712b42d KK |
810 | if (IS_ERR(hc->socket_thread)) { |
811 | int err = PTR_ERR(hc->socket_thread); | |
812 | printk(KERN_ERR "%s: Failed (%d) to create socket process.\n", | |
475be4d8 | 813 | __func__, err); |
3712b42d KK |
814 | hc->socket_thread = NULL; |
815 | sock_release(hc->socket); | |
816 | return err; | |
817 | } | |
818 | if (debug & DEBUG_L1OIP_SOCKET) | |
819 | printk(KERN_DEBUG "%s: socket thread created\n", __func__); | |
820 | ||
821 | return 0; | |
822 | } | |
823 | ||
824 | ||
825 | static void | |
826 | l1oip_send_bh(struct work_struct *work) | |
827 | { | |
828 | struct l1oip *hc = container_of(work, struct l1oip, workq); | |
829 | ||
475be4d8 | 830 | if (debug & (DEBUG_L1OIP_MSG | DEBUG_L1OIP_SOCKET)) |
3712b42d | 831 | printk(KERN_DEBUG "%s: keepalive timer expired, sending empty " |
475be4d8 | 832 | "frame on dchannel\n", __func__); |
3712b42d KK |
833 | |
834 | /* send an empty l1oip frame at D-channel */ | |
835 | l1oip_socket_send(hc, 0, hc->d_idx, 0, 0, NULL, 0); | |
836 | } | |
837 | ||
838 | ||
839 | /* | |
840 | * timer stuff | |
841 | */ | |
842 | static void | |
843 | l1oip_keepalive(void *data) | |
844 | { | |
845 | struct l1oip *hc = (struct l1oip *)data; | |
846 | ||
847 | schedule_work(&hc->workq); | |
848 | } | |
849 | ||
850 | static void | |
851 | l1oip_timeout(void *data) | |
852 | { | |
853 | struct l1oip *hc = (struct l1oip *)data; | |
854 | struct dchannel *dch = hc->chan[hc->d_idx].dch; | |
855 | ||
856 | if (debug & DEBUG_L1OIP_MSG) | |
857 | printk(KERN_DEBUG "%s: timeout timer expired, turn layer one " | |
475be4d8 | 858 | "down.\n", __func__); |
3712b42d KK |
859 | |
860 | hc->timeout_on = 0; /* state that timer must be initialized next time */ | |
861 | ||
862 | /* if timeout, we send up a PH_DEACTIVATE and deactivate */ | |
863 | if (test_bit(FLG_ACTIVE, &dch->Flags)) { | |
475be4d8 | 864 | if (debug & (DEBUG_L1OIP_MSG | DEBUG_L1OIP_SOCKET)) |
3712b42d | 865 | printk(KERN_DEBUG "%s: interface become deactivated " |
475be4d8 | 866 | "due to timeout\n", __func__); |
3712b42d KK |
867 | test_and_clear_bit(FLG_ACTIVE, &dch->Flags); |
868 | _queue_data(&dch->dev.D, PH_DEACTIVATE_IND, MISDN_ID_ANY, 0, | |
475be4d8 | 869 | NULL, GFP_ATOMIC); |
3712b42d KK |
870 | } |
871 | ||
872 | /* if we have ondemand set, we remove ip address */ | |
873 | if (hc->ondemand) { | |
874 | if (debug & DEBUG_L1OIP_MSG) | |
875 | printk(KERN_DEBUG "%s: on demand causes ip address to " | |
475be4d8 | 876 | "be removed\n", __func__); |
3712b42d KK |
877 | hc->sin_remote.sin_addr.s_addr = 0; |
878 | } | |
879 | } | |
880 | ||
881 | ||
882 | /* | |
883 | * message handling | |
884 | */ | |
885 | static int | |
886 | handle_dmsg(struct mISDNchannel *ch, struct sk_buff *skb) | |
887 | { | |
888 | struct mISDNdevice *dev = container_of(ch, struct mISDNdevice, D); | |
889 | struct dchannel *dch = container_of(dev, struct dchannel, dev); | |
890 | struct l1oip *hc = dch->hw; | |
891 | struct mISDNhead *hh = mISDN_HEAD_P(skb); | |
892 | int ret = -EINVAL; | |
893 | int l, ll; | |
894 | unsigned char *p; | |
895 | ||
896 | switch (hh->prim) { | |
897 | case PH_DATA_REQ: | |
898 | if (skb->len < 1) { | |
899 | printk(KERN_WARNING "%s: skb too small\n", | |
475be4d8 | 900 | __func__); |
3712b42d KK |
901 | break; |
902 | } | |
903 | if (skb->len > MAX_DFRAME_LEN_L1 || skb->len > L1OIP_MAX_LEN) { | |
904 | printk(KERN_WARNING "%s: skb too large\n", | |
475be4d8 | 905 | __func__); |
3712b42d KK |
906 | break; |
907 | } | |
908 | /* send frame */ | |
909 | p = skb->data; | |
910 | l = skb->len; | |
911 | while (l) { | |
eac74af9 | 912 | ll = (l < L1OIP_MAX_PERFRAME) ? l : L1OIP_MAX_PERFRAME; |
3712b42d | 913 | l1oip_socket_send(hc, 0, dch->slot, 0, |
475be4d8 | 914 | hc->chan[dch->slot].tx_counter++, p, ll); |
3712b42d KK |
915 | p += ll; |
916 | l -= ll; | |
917 | } | |
918 | skb_trim(skb, 0); | |
919 | queue_ch_frame(ch, PH_DATA_CNF, hh->id, skb); | |
920 | return 0; | |
921 | case PH_ACTIVATE_REQ: | |
475be4d8 | 922 | if (debug & (DEBUG_L1OIP_MSG | DEBUG_L1OIP_SOCKET)) |
3712b42d | 923 | printk(KERN_DEBUG "%s: PH_ACTIVATE channel %d (1..%d)\n" |
475be4d8 | 924 | , __func__, dch->slot, hc->b_num + 1); |
3712b42d KK |
925 | skb_trim(skb, 0); |
926 | if (test_bit(FLG_ACTIVE, &dch->Flags)) | |
927 | queue_ch_frame(ch, PH_ACTIVATE_IND, hh->id, skb); | |
928 | else | |
929 | queue_ch_frame(ch, PH_DEACTIVATE_IND, hh->id, skb); | |
930 | return 0; | |
931 | case PH_DEACTIVATE_REQ: | |
475be4d8 | 932 | if (debug & (DEBUG_L1OIP_MSG | DEBUG_L1OIP_SOCKET)) |
3712b42d | 933 | printk(KERN_DEBUG "%s: PH_DEACTIVATE channel %d " |
475be4d8 JP |
934 | "(1..%d)\n", __func__, dch->slot, |
935 | hc->b_num + 1); | |
3712b42d KK |
936 | skb_trim(skb, 0); |
937 | if (test_bit(FLG_ACTIVE, &dch->Flags)) | |
938 | queue_ch_frame(ch, PH_ACTIVATE_IND, hh->id, skb); | |
939 | else | |
940 | queue_ch_frame(ch, PH_DEACTIVATE_IND, hh->id, skb); | |
941 | return 0; | |
942 | } | |
943 | if (!ret) | |
944 | dev_kfree_skb(skb); | |
945 | return ret; | |
946 | } | |
947 | ||
948 | static int | |
949 | channel_dctrl(struct dchannel *dch, struct mISDN_ctrl_req *cq) | |
950 | { | |
951 | int ret = 0; | |
952 | struct l1oip *hc = dch->hw; | |
953 | ||
954 | switch (cq->op) { | |
955 | case MISDN_CTRL_GETOP: | |
1b4d3312 AE |
956 | cq->op = MISDN_CTRL_SETPEER | MISDN_CTRL_UNSETPEER |
957 | | MISDN_CTRL_GETPEER; | |
3712b42d KK |
958 | break; |
959 | case MISDN_CTRL_SETPEER: | |
960 | hc->remoteip = (u32)cq->p1; | |
961 | hc->remoteport = cq->p2 & 0xffff; | |
962 | hc->localport = cq->p2 >> 16; | |
963 | if (!hc->remoteport) | |
964 | hc->remoteport = hc->localport; | |
965 | if (debug & DEBUG_L1OIP_SOCKET) | |
966 | printk(KERN_DEBUG "%s: got new ip address from user " | |
475be4d8 | 967 | "space.\n", __func__); |
f7df0b8d | 968 | l1oip_socket_open(hc); |
3712b42d KK |
969 | break; |
970 | case MISDN_CTRL_UNSETPEER: | |
971 | if (debug & DEBUG_L1OIP_SOCKET) | |
972 | printk(KERN_DEBUG "%s: removing ip address.\n", | |
475be4d8 | 973 | __func__); |
3712b42d KK |
974 | hc->remoteip = 0; |
975 | l1oip_socket_open(hc); | |
976 | break; | |
1b4d3312 AE |
977 | case MISDN_CTRL_GETPEER: |
978 | if (debug & DEBUG_L1OIP_SOCKET) | |
979 | printk(KERN_DEBUG "%s: getting ip address.\n", | |
475be4d8 | 980 | __func__); |
1b36c78f | 981 | cq->p1 = hc->remoteip; |
1b4d3312 AE |
982 | cq->p2 = hc->remoteport | (hc->localport << 16); |
983 | break; | |
3712b42d KK |
984 | default: |
985 | printk(KERN_WARNING "%s: unknown Op %x\n", | |
475be4d8 | 986 | __func__, cq->op); |
3712b42d KK |
987 | ret = -EINVAL; |
988 | break; | |
989 | } | |
990 | return ret; | |
991 | } | |
992 | ||
993 | static int | |
994 | open_dchannel(struct l1oip *hc, struct dchannel *dch, struct channel_req *rq) | |
995 | { | |
996 | if (debug & DEBUG_HW_OPEN) | |
997 | printk(KERN_DEBUG "%s: dev(%d) open from %p\n", __func__, | |
475be4d8 | 998 | dch->dev.id, __builtin_return_address(0)); |
3712b42d KK |
999 | if (rq->protocol == ISDN_P_NONE) |
1000 | return -EINVAL; | |
1001 | if ((dch->dev.D.protocol != ISDN_P_NONE) && | |
1002 | (dch->dev.D.protocol != rq->protocol)) { | |
1003 | if (debug & DEBUG_HW_OPEN) | |
1004 | printk(KERN_WARNING "%s: change protocol %x to %x\n", | |
475be4d8 | 1005 | __func__, dch->dev.D.protocol, rq->protocol); |
3712b42d KK |
1006 | } |
1007 | if (dch->dev.D.protocol != rq->protocol) | |
1008 | dch->dev.D.protocol = rq->protocol; | |
1009 | ||
1010 | if (test_bit(FLG_ACTIVE, &dch->Flags)) { | |
1011 | _queue_data(&dch->dev.D, PH_ACTIVATE_IND, MISDN_ID_ANY, | |
475be4d8 | 1012 | 0, NULL, GFP_KERNEL); |
3712b42d KK |
1013 | } |
1014 | rq->ch = &dch->dev.D; | |
1015 | if (!try_module_get(THIS_MODULE)) | |
1016 | printk(KERN_WARNING "%s:cannot get module\n", __func__); | |
1017 | return 0; | |
1018 | } | |
1019 | ||
1020 | static int | |
1021 | open_bchannel(struct l1oip *hc, struct dchannel *dch, struct channel_req *rq) | |
1022 | { | |
1023 | struct bchannel *bch; | |
1024 | int ch; | |
1025 | ||
ff4cc1de | 1026 | if (!test_channelmap(rq->adr.channel, dch->dev.channelmap)) |
3712b42d KK |
1027 | return -EINVAL; |
1028 | if (rq->protocol == ISDN_P_NONE) | |
1029 | return -EINVAL; | |
1030 | ch = rq->adr.channel; /* BRI: 1=B1 2=B2 PRI: 1..15,17.. */ | |
1031 | bch = hc->chan[ch].bch; | |
1032 | if (!bch) { | |
1033 | printk(KERN_ERR "%s:internal error ch %d has no bch\n", | |
475be4d8 | 1034 | __func__, ch); |
3712b42d KK |
1035 | return -EINVAL; |
1036 | } | |
1037 | if (test_and_set_bit(FLG_OPEN, &bch->Flags)) | |
1038 | return -EBUSY; /* b-channel can be only open once */ | |
1039 | bch->ch.protocol = rq->protocol; | |
1040 | rq->ch = &bch->ch; | |
1041 | if (!try_module_get(THIS_MODULE)) | |
1042 | printk(KERN_WARNING "%s:cannot get module\n", __func__); | |
1043 | return 0; | |
1044 | } | |
1045 | ||
1046 | static int | |
1047 | l1oip_dctrl(struct mISDNchannel *ch, u_int cmd, void *arg) | |
1048 | { | |
1049 | struct mISDNdevice *dev = container_of(ch, struct mISDNdevice, D); | |
1050 | struct dchannel *dch = container_of(dev, struct dchannel, dev); | |
1051 | struct l1oip *hc = dch->hw; | |
1052 | struct channel_req *rq; | |
1053 | int err = 0; | |
1054 | ||
1055 | if (dch->debug & DEBUG_HW) | |
1056 | printk(KERN_DEBUG "%s: cmd:%x %p\n", | |
475be4d8 | 1057 | __func__, cmd, arg); |
3712b42d KK |
1058 | switch (cmd) { |
1059 | case OPEN_CHANNEL: | |
1060 | rq = arg; | |
1061 | switch (rq->protocol) { | |
1062 | case ISDN_P_TE_S0: | |
1063 | case ISDN_P_NT_S0: | |
1064 | if (hc->pri) { | |
1065 | err = -EINVAL; | |
1066 | break; | |
1067 | } | |
1068 | err = open_dchannel(hc, dch, rq); | |
1069 | break; | |
1070 | case ISDN_P_TE_E1: | |
1071 | case ISDN_P_NT_E1: | |
1072 | if (!hc->pri) { | |
1073 | err = -EINVAL; | |
1074 | break; | |
1075 | } | |
1076 | err = open_dchannel(hc, dch, rq); | |
1077 | break; | |
1078 | default: | |
1079 | err = open_bchannel(hc, dch, rq); | |
1080 | } | |
1081 | break; | |
1082 | case CLOSE_CHANNEL: | |
1083 | if (debug & DEBUG_HW_OPEN) | |
1084 | printk(KERN_DEBUG "%s: dev(%d) close from %p\n", | |
475be4d8 JP |
1085 | __func__, dch->dev.id, |
1086 | __builtin_return_address(0)); | |
3712b42d KK |
1087 | module_put(THIS_MODULE); |
1088 | break; | |
1089 | case CONTROL_CHANNEL: | |
1090 | err = channel_dctrl(dch, arg); | |
1091 | break; | |
1092 | default: | |
1093 | if (dch->debug & DEBUG_HW) | |
1094 | printk(KERN_DEBUG "%s: unknown command %x\n", | |
475be4d8 | 1095 | __func__, cmd); |
3712b42d KK |
1096 | err = -EINVAL; |
1097 | } | |
1098 | return err; | |
1099 | } | |
1100 | ||
1101 | static int | |
1102 | handle_bmsg(struct mISDNchannel *ch, struct sk_buff *skb) | |
1103 | { | |
1104 | struct bchannel *bch = container_of(ch, struct bchannel, ch); | |
1105 | struct l1oip *hc = bch->hw; | |
1106 | int ret = -EINVAL; | |
1107 | struct mISDNhead *hh = mISDN_HEAD_P(skb); | |
b5d5843a | 1108 | int l, ll; |
3712b42d KK |
1109 | unsigned char *p; |
1110 | ||
1111 | switch (hh->prim) { | |
1112 | case PH_DATA_REQ: | |
1113 | if (skb->len <= 0) { | |
1114 | printk(KERN_WARNING "%s: skb too small\n", | |
475be4d8 | 1115 | __func__); |
3712b42d KK |
1116 | break; |
1117 | } | |
1118 | if (skb->len > MAX_DFRAME_LEN_L1 || skb->len > L1OIP_MAX_LEN) { | |
1119 | printk(KERN_WARNING "%s: skb too large\n", | |
475be4d8 | 1120 | __func__); |
3712b42d KK |
1121 | break; |
1122 | } | |
1123 | /* check for AIS / ulaw-silence */ | |
3712b42d | 1124 | l = skb->len; |
b5d5843a | 1125 | if (!memchr_inv(skb->data, 0xff, l)) { |
3712b42d KK |
1126 | if (debug & DEBUG_L1OIP_MSG) |
1127 | printk(KERN_DEBUG "%s: got AIS, not sending, " | |
475be4d8 | 1128 | "but counting\n", __func__); |
3712b42d KK |
1129 | hc->chan[bch->slot].tx_counter += l; |
1130 | skb_trim(skb, 0); | |
1131 | queue_ch_frame(ch, PH_DATA_CNF, hh->id, skb); | |
1132 | return 0; | |
1133 | } | |
1134 | /* check for silence */ | |
3712b42d | 1135 | l = skb->len; |
b5d5843a | 1136 | if (!memchr_inv(skb->data, 0x2a, l)) { |
3712b42d KK |
1137 | if (debug & DEBUG_L1OIP_MSG) |
1138 | printk(KERN_DEBUG "%s: got silence, not sending" | |
475be4d8 | 1139 | ", but counting\n", __func__); |
3712b42d KK |
1140 | hc->chan[bch->slot].tx_counter += l; |
1141 | skb_trim(skb, 0); | |
1142 | queue_ch_frame(ch, PH_DATA_CNF, hh->id, skb); | |
1143 | return 0; | |
1144 | } | |
1145 | ||
1146 | /* send frame */ | |
1147 | p = skb->data; | |
1148 | l = skb->len; | |
1149 | while (l) { | |
eac74af9 | 1150 | ll = (l < L1OIP_MAX_PERFRAME) ? l : L1OIP_MAX_PERFRAME; |
3712b42d | 1151 | l1oip_socket_send(hc, hc->codec, bch->slot, 0, |
475be4d8 | 1152 | hc->chan[bch->slot].tx_counter, p, ll); |
3712b42d KK |
1153 | hc->chan[bch->slot].tx_counter += ll; |
1154 | p += ll; | |
1155 | l -= ll; | |
1156 | } | |
1157 | skb_trim(skb, 0); | |
1158 | queue_ch_frame(ch, PH_DATA_CNF, hh->id, skb); | |
1159 | return 0; | |
1160 | case PH_ACTIVATE_REQ: | |
475be4d8 | 1161 | if (debug & (DEBUG_L1OIP_MSG | DEBUG_L1OIP_SOCKET)) |
3712b42d | 1162 | printk(KERN_DEBUG "%s: PH_ACTIVATE channel %d (1..%d)\n" |
475be4d8 | 1163 | , __func__, bch->slot, hc->b_num + 1); |
3712b42d KK |
1164 | hc->chan[bch->slot].codecstate = 0; |
1165 | test_and_set_bit(FLG_ACTIVE, &bch->Flags); | |
1166 | skb_trim(skb, 0); | |
1167 | queue_ch_frame(ch, PH_ACTIVATE_IND, hh->id, skb); | |
1168 | return 0; | |
1169 | case PH_DEACTIVATE_REQ: | |
475be4d8 | 1170 | if (debug & (DEBUG_L1OIP_MSG | DEBUG_L1OIP_SOCKET)) |
3712b42d | 1171 | printk(KERN_DEBUG "%s: PH_DEACTIVATE channel %d " |
475be4d8 JP |
1172 | "(1..%d)\n", __func__, bch->slot, |
1173 | hc->b_num + 1); | |
3712b42d KK |
1174 | test_and_clear_bit(FLG_ACTIVE, &bch->Flags); |
1175 | skb_trim(skb, 0); | |
1176 | queue_ch_frame(ch, PH_DEACTIVATE_IND, hh->id, skb); | |
1177 | return 0; | |
1178 | } | |
1179 | if (!ret) | |
1180 | dev_kfree_skb(skb); | |
1181 | return ret; | |
1182 | } | |
1183 | ||
1184 | static int | |
1185 | channel_bctrl(struct bchannel *bch, struct mISDN_ctrl_req *cq) | |
1186 | { | |
1187 | int ret = 0; | |
1188 | struct dsp_features *features = | |
1189 | (struct dsp_features *)(*((u_long *)&cq->p1)); | |
1190 | ||
1191 | switch (cq->op) { | |
1192 | case MISDN_CTRL_GETOP: | |
1193 | cq->op = MISDN_CTRL_HW_FEATURES_OP; | |
1194 | break; | |
1195 | case MISDN_CTRL_HW_FEATURES: /* fill features structure */ | |
1196 | if (debug & DEBUG_L1OIP_MSG) | |
1197 | printk(KERN_DEBUG "%s: HW_FEATURE request\n", | |
475be4d8 | 1198 | __func__); |
3712b42d KK |
1199 | /* create confirm */ |
1200 | features->unclocked = 1; | |
1201 | features->unordered = 1; | |
1202 | break; | |
1203 | default: | |
1204 | printk(KERN_WARNING "%s: unknown Op %x\n", | |
475be4d8 | 1205 | __func__, cq->op); |
3712b42d KK |
1206 | ret = -EINVAL; |
1207 | break; | |
1208 | } | |
1209 | return ret; | |
1210 | } | |
1211 | ||
1212 | static int | |
1213 | l1oip_bctrl(struct mISDNchannel *ch, u_int cmd, void *arg) | |
1214 | { | |
1215 | struct bchannel *bch = container_of(ch, struct bchannel, ch); | |
1216 | int err = -EINVAL; | |
1217 | ||
1218 | if (bch->debug & DEBUG_HW) | |
1219 | printk(KERN_DEBUG "%s: cmd:%x %p\n", | |
475be4d8 | 1220 | __func__, cmd, arg); |
3712b42d KK |
1221 | switch (cmd) { |
1222 | case CLOSE_CHANNEL: | |
1223 | test_and_clear_bit(FLG_OPEN, &bch->Flags); | |
1224 | test_and_clear_bit(FLG_ACTIVE, &bch->Flags); | |
1225 | ch->protocol = ISDN_P_NONE; | |
1226 | ch->peer = NULL; | |
1227 | module_put(THIS_MODULE); | |
1228 | err = 0; | |
1229 | break; | |
1230 | case CONTROL_CHANNEL: | |
1231 | err = channel_bctrl(bch, arg); | |
1232 | break; | |
1233 | default: | |
1234 | printk(KERN_WARNING "%s: unknown prim(%x)\n", | |
475be4d8 | 1235 | __func__, cmd); |
3712b42d KK |
1236 | } |
1237 | return err; | |
1238 | } | |
1239 | ||
1240 | ||
1241 | /* | |
1242 | * cleanup module and stack | |
1243 | */ | |
1244 | static void | |
1245 | release_card(struct l1oip *hc) | |
1246 | { | |
1247 | int ch; | |
1248 | ||
1249 | if (timer_pending(&hc->keep_tl)) | |
1250 | del_timer(&hc->keep_tl); | |
1251 | ||
1252 | if (timer_pending(&hc->timeout_tl)) | |
1253 | del_timer(&hc->timeout_tl); | |
1254 | ||
0d26aa70 TH |
1255 | cancel_work_sync(&hc->workq); |
1256 | ||
3712b42d KK |
1257 | if (hc->socket_thread) |
1258 | l1oip_socket_close(hc); | |
1259 | ||
1260 | if (hc->registered && hc->chan[hc->d_idx].dch) | |
1261 | mISDN_unregister_device(&hc->chan[hc->d_idx].dch->dev); | |
1262 | for (ch = 0; ch < 128; ch++) { | |
1263 | if (hc->chan[ch].dch) { | |
1264 | mISDN_freedchannel(hc->chan[ch].dch); | |
1265 | kfree(hc->chan[ch].dch); | |
1266 | } | |
1267 | if (hc->chan[ch].bch) { | |
1268 | mISDN_freebchannel(hc->chan[ch].bch); | |
1269 | kfree(hc->chan[ch].bch); | |
1270 | #ifdef REORDER_DEBUG | |
1271 | if (hc->chan[ch].disorder_skb) | |
1272 | dev_kfree_skb(hc->chan[ch].disorder_skb); | |
1273 | #endif | |
1274 | } | |
1275 | } | |
1276 | ||
1277 | spin_lock(&l1oip_lock); | |
1278 | list_del(&hc->list); | |
1279 | spin_unlock(&l1oip_lock); | |
1280 | ||
1281 | kfree(hc); | |
1282 | } | |
1283 | ||
1284 | static void | |
1285 | l1oip_cleanup(void) | |
1286 | { | |
1287 | struct l1oip *hc, *next; | |
1288 | ||
1289 | list_for_each_entry_safe(hc, next, &l1oip_ilist, list) | |
1290 | release_card(hc); | |
1291 | ||
1292 | l1oip_4bit_free(); | |
1293 | } | |
1294 | ||
1295 | ||
1296 | /* | |
1297 | * module and stack init | |
1298 | */ | |
1299 | static int | |
1300 | init_card(struct l1oip *hc, int pri, int bundle) | |
1301 | { | |
1302 | struct dchannel *dch; | |
1303 | struct bchannel *bch; | |
1304 | int ret; | |
1305 | int i, ch; | |
1306 | ||
1307 | spin_lock_init(&hc->socket_lock); | |
1308 | hc->idx = l1oip_cnt; | |
1309 | hc->pri = pri; | |
eac74af9 KK |
1310 | hc->d_idx = pri ? 16 : 3; |
1311 | hc->b_num = pri ? 30 : 2; | |
3712b42d KK |
1312 | hc->bundle = bundle; |
1313 | if (hc->pri) | |
1314 | sprintf(hc->name, "l1oip-e1.%d", l1oip_cnt + 1); | |
1315 | else | |
1316 | sprintf(hc->name, "l1oip-s0.%d", l1oip_cnt + 1); | |
1317 | ||
1318 | switch (codec[l1oip_cnt]) { | |
1319 | case 0: /* as is */ | |
1320 | case 1: /* alaw */ | |
1321 | case 2: /* ulaw */ | |
1322 | case 3: /* 4bit */ | |
1323 | break; | |
1324 | default: | |
1325 | printk(KERN_ERR "Codec(%d) not supported.\n", | |
475be4d8 | 1326 | codec[l1oip_cnt]); |
3712b42d KK |
1327 | return -EINVAL; |
1328 | } | |
1329 | hc->codec = codec[l1oip_cnt]; | |
1330 | if (debug & DEBUG_L1OIP_INIT) | |
1331 | printk(KERN_DEBUG "%s: using codec %d\n", | |
475be4d8 | 1332 | __func__, hc->codec); |
3712b42d KK |
1333 | |
1334 | if (id[l1oip_cnt] == 0) { | |
1335 | printk(KERN_WARNING "Warning: No 'id' value given or " | |
475be4d8 | 1336 | "0, this is highly unsecure. Please use 32 " |
6774def6 | 1337 | "bit random number 0x...\n"); |
3712b42d KK |
1338 | } |
1339 | hc->id = id[l1oip_cnt]; | |
1340 | if (debug & DEBUG_L1OIP_INIT) | |
1341 | printk(KERN_DEBUG "%s: using id 0x%x\n", __func__, hc->id); | |
1342 | ||
1343 | hc->ondemand = ondemand[l1oip_cnt]; | |
1344 | if (hc->ondemand && !hc->id) { | |
1345 | printk(KERN_ERR "%s: ondemand option only allowed in " | |
475be4d8 | 1346 | "conjunction with non 0 ID\n", __func__); |
3712b42d KK |
1347 | return -EINVAL; |
1348 | } | |
1349 | ||
1350 | if (limit[l1oip_cnt]) | |
1351 | hc->b_num = limit[l1oip_cnt]; | |
1352 | if (!pri && hc->b_num > 2) { | |
1353 | printk(KERN_ERR "Maximum limit for BRI interface is 2 " | |
475be4d8 | 1354 | "channels.\n"); |
3712b42d KK |
1355 | return -EINVAL; |
1356 | } | |
1357 | if (pri && hc->b_num > 126) { | |
1358 | printk(KERN_ERR "Maximum limit for PRI interface is 126 " | |
475be4d8 | 1359 | "channels.\n"); |
3712b42d KK |
1360 | return -EINVAL; |
1361 | } | |
1362 | if (pri && hc->b_num > 30) { | |
1363 | printk(KERN_WARNING "Maximum limit for BRI interface is 30 " | |
475be4d8 | 1364 | "channels.\n"); |
3712b42d | 1365 | printk(KERN_WARNING "Your selection of %d channels must be " |
475be4d8 | 1366 | "supported by application.\n", hc->limit); |
3712b42d KK |
1367 | } |
1368 | ||
475be4d8 JP |
1369 | hc->remoteip = ip[l1oip_cnt << 2] << 24 |
1370 | | ip[(l1oip_cnt << 2) + 1] << 16 | |
1371 | | ip[(l1oip_cnt << 2) + 2] << 8 | |
1372 | | ip[(l1oip_cnt << 2) + 3]; | |
1373 | hc->localport = port[l1oip_cnt]?:(L1OIP_DEFAULTPORT + l1oip_cnt); | |
3712b42d KK |
1374 | if (remoteport[l1oip_cnt]) |
1375 | hc->remoteport = remoteport[l1oip_cnt]; | |
1376 | else | |
1377 | hc->remoteport = hc->localport; | |
1378 | if (debug & DEBUG_L1OIP_INIT) | |
1379 | printk(KERN_DEBUG "%s: using local port %d remote ip " | |
475be4d8 JP |
1380 | "%d.%d.%d.%d port %d ondemand %d\n", __func__, |
1381 | hc->localport, hc->remoteip >> 24, | |
1382 | (hc->remoteip >> 16) & 0xff, | |
1383 | (hc->remoteip >> 8) & 0xff, hc->remoteip & 0xff, | |
1384 | hc->remoteport, hc->ondemand); | |
3712b42d KK |
1385 | |
1386 | dch = kzalloc(sizeof(struct dchannel), GFP_KERNEL); | |
1387 | if (!dch) | |
1388 | return -ENOMEM; | |
1389 | dch->debug = debug; | |
1390 | mISDN_initdchannel(dch, MAX_DFRAME_LEN_L1, NULL); | |
1391 | dch->hw = hc; | |
1392 | if (pri) | |
1393 | dch->dev.Dprotocols = (1 << ISDN_P_TE_E1) | (1 << ISDN_P_NT_E1); | |
1394 | else | |
1395 | dch->dev.Dprotocols = (1 << ISDN_P_TE_S0) | (1 << ISDN_P_NT_S0); | |
1396 | dch->dev.Bprotocols = (1 << (ISDN_P_B_RAW & ISDN_P_B_MASK)) | | |
475be4d8 | 1397 | (1 << (ISDN_P_B_HDLC & ISDN_P_B_MASK)); |
3712b42d KK |
1398 | dch->dev.D.send = handle_dmsg; |
1399 | dch->dev.D.ctrl = l1oip_dctrl; | |
1400 | dch->dev.nrbchan = hc->b_num; | |
1401 | dch->slot = hc->d_idx; | |
1402 | hc->chan[hc->d_idx].dch = dch; | |
1403 | i = 1; | |
1404 | for (ch = 0; ch < dch->dev.nrbchan; ch++) { | |
1405 | if (ch == 15) | |
1406 | i++; | |
1407 | bch = kzalloc(sizeof(struct bchannel), GFP_KERNEL); | |
1408 | if (!bch) { | |
1409 | printk(KERN_ERR "%s: no memory for bchannel\n", | |
475be4d8 | 1410 | __func__); |
3712b42d KK |
1411 | return -ENOMEM; |
1412 | } | |
1413 | bch->nr = i + ch; | |
1414 | bch->slot = i + ch; | |
1415 | bch->debug = debug; | |
034005a0 | 1416 | mISDN_initbchannel(bch, MAX_DATA_MEM, 0); |
3712b42d KK |
1417 | bch->hw = hc; |
1418 | bch->ch.send = handle_bmsg; | |
1419 | bch->ch.ctrl = l1oip_bctrl; | |
1420 | bch->ch.nr = i + ch; | |
1421 | list_add(&bch->ch.list, &dch->dev.bchannels); | |
1422 | hc->chan[i + ch].bch = bch; | |
ff4cc1de | 1423 | set_channelmap(bch->nr, dch->dev.channelmap); |
3712b42d | 1424 | } |
b36b654a MU |
1425 | /* TODO: create a parent device for this driver */ |
1426 | ret = mISDN_register_device(&dch->dev, NULL, hc->name); | |
3712b42d KK |
1427 | if (ret) |
1428 | return ret; | |
1429 | hc->registered = 1; | |
1430 | ||
1431 | if (debug & DEBUG_L1OIP_INIT) | |
1432 | printk(KERN_DEBUG "%s: Setting up network card(%d)\n", | |
475be4d8 | 1433 | __func__, l1oip_cnt + 1); |
3712b42d KK |
1434 | ret = l1oip_socket_open(hc); |
1435 | if (ret) | |
1436 | return ret; | |
1437 | ||
1438 | hc->keep_tl.function = (void *)l1oip_keepalive; | |
1439 | hc->keep_tl.data = (ulong)hc; | |
1440 | init_timer(&hc->keep_tl); | |
475be4d8 | 1441 | hc->keep_tl.expires = jiffies + 2 * HZ; /* two seconds first time */ |
3712b42d KK |
1442 | add_timer(&hc->keep_tl); |
1443 | ||
1444 | hc->timeout_tl.function = (void *)l1oip_timeout; | |
1445 | hc->timeout_tl.data = (ulong)hc; | |
1446 | init_timer(&hc->timeout_tl); | |
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); |