1 /*****************************************************************************\
3 ** Linux Call Router **
5 **---------------------------------------------------------------------------**
6 ** Copyright: Andreas Eversberg **
8 ** mISDN channel handlin for remote application **
10 \*****************************************************************************/
18 #include <sys/ioctl.h>
19 #include <sys/types.h>
22 #include <netinet/udp.h>
23 #include <netinet/in.h>
25 #include <sys/socket.h>
28 #define AF_COMPATIBILITY_FUNC 1
29 #define MISDN_OLD_AF_COMPATIBILITY 1
30 #include <compat_af_isdn.h>
32 #define HAVE_ATTRIBUTE_always_inline 1
33 #define HAVE_ARPA_INET_H 1
34 #define HAVE_TIMERSUB 1
36 #include <asterisk/compiler.h>
37 #include <asterisk/frame.h>
39 /* Choose if you want to have chan_lcr for Asterisk 1.4.x or CallWeaver 1.2.x */
40 /* #define LCR_FOR_CALLWEAVER */
42 #ifdef LCR_FOR_CALLWEAVER
43 #include <asterisk/phone_no_utils.h>
44 #include <asterisk/logger.h>
45 #include <asterisk/module.h>
46 #include <asterisk/channel.h>
49 #include "extension.h"
51 #include "lcrsocket.h"
58 #ifndef ISDN_PID_L4_B_USER
59 #define ISDN_PID_L4_B_USER 0x440000ff
72 int bchannel_initialize(void)
79 void bchannel_deinitialize(void)
84 * send control information to the channel (dsp-module)
86 static void ph_control(int sock, unsigned int c1, unsigned int c2, char *trace_name, int trace_value, int b_mode)
88 unsigned char buffer[MISDN_HEADER_LEN+sizeof(int)+sizeof(int)];
89 struct mISDNhead *ctrl = (struct mISDNhead *)buffer;
90 unsigned int *d = (unsigned int *)(buffer+MISDN_HEADER_LEN);
93 if (b_mode != 0 && b_mode != 2)
96 CDEBUG(NULL, NULL, "Sending PH_CONTROL %s %x,%x\n", trace_name, c1, c2);
97 ctrl->prim = PH_CONTROL_REQ;
101 ret = sendto(sock, buffer, MISDN_HEADER_LEN+sizeof(int)*2, 0, NULL, 0);
103 CERROR(NULL, NULL, "Failed to send to socket %d\n", sock);
106 static void ph_control_block(int sock, unsigned int c1, void *c2, int c2_len, char *trace_name, int trace_value, int b_mode)
108 unsigned char buffer[MISDN_HEADER_LEN+sizeof(int)+c2_len];
109 struct mISDNhead *ctrl = (struct mISDNhead *)buffer;
110 unsigned int *d = (unsigned int *)(buffer+MISDN_HEADER_LEN);
113 if (b_mode != 0 && b_mode != 2)
116 CDEBUG(NULL, NULL, "Sending PH_CONTROL (block) %s %x\n", trace_name, c1);
117 ctrl->prim = PH_CONTROL_REQ;
120 memcpy(d, c2, c2_len);
121 ret = sendto(sock, buffer, MISDN_HEADER_LEN+sizeof(int)+c2_len, 0, NULL, 0);
123 CERROR(NULL, NULL, "Failed to send to socket %d\n", sock);
130 int bchannel_create(struct bchannel *bchannel, int mode)
134 struct sockaddr_mISDN addr;
136 if (bchannel->b_sock > -1) {
137 CERROR(bchannel->call, NULL, "Socket already created for handle 0x%x\n", bchannel->handle);
142 bchannel->b_mode = mode;
143 switch(bchannel->b_mode) {
145 CDEBUG(bchannel->call, NULL, "Open DSP audio\n");
146 bchannel->b_sock = socket(PF_ISDN, SOCK_DGRAM, ISDN_P_B_L2DSP);
149 CDEBUG(bchannel->call, NULL, "Open audio\n");
150 bchannel->b_sock = socket(PF_ISDN, SOCK_DGRAM, ISDN_P_B_RAW);
153 CDEBUG(bchannel->call, NULL, "Open DSP HDLC\n");
154 bchannel->b_sock = socket(PF_ISDN, SOCK_DGRAM, ISDN_P_B_L2DSPHDLC);
157 CDEBUG(bchannel->call, NULL, "Open HDLC\n");
158 bchannel->b_sock = socket(PF_ISDN, SOCK_DGRAM, ISDN_P_B_HDLC);
161 if (bchannel->b_sock < 0) {
162 CERROR(bchannel->call, NULL, "Failed to open bchannel-socket for handle 0x%x with mISDN-DSP layer. Did you load mISDN_dsp.ko?\n", bchannel->handle);
166 /* set nonblocking io */
167 ret = ioctl(bchannel->b_sock, FIONBIO, &on);
169 CERROR(bchannel->call, NULL, "Failed to set bchannel-socket handle 0x%x into nonblocking IO\n", bchannel->handle);
170 close(bchannel->b_sock);
171 bchannel->b_sock = -1;
175 /* bind socket to bchannel */
176 addr.family = AF_ISDN;
177 addr.dev = (bchannel->handle>>8);
178 addr.channel = bchannel->handle & 0xff;
179 ret = bind(bchannel->b_sock, (struct sockaddr *)&addr, sizeof(addr));
181 CERROR(bchannel->call, NULL, "Failed to bind bchannel-socket for handle 0x%x with mISDN-DSP layer. (port %d, channel %d) Did you load mISDN_dsp.ko?\n", bchannel->handle, addr.dev, addr.channel);
182 close(bchannel->b_sock);
183 bchannel->b_sock = -1;
191 * activate / deactivate request
193 void bchannel_activate(struct bchannel *bchannel, int activate)
195 struct mISDNhead act;
198 /* activate bchannel */
199 CDEBUG(bchannel->call, NULL, "%sActivating B-channel.\n", activate?"":"De-");
200 switch(bchannel->b_mode) {
203 act.prim = (activate)?DL_ESTABLISH_REQ:DL_RELEASE_REQ;
207 act.prim = (activate)?PH_ACTIVATE_REQ:PH_DEACTIVATE_REQ;
211 ret = sendto(bchannel->b_sock, &act, MISDN_HEADER_LEN, 0, NULL, 0);
213 CERROR(bchannel->call, NULL, "Failed to send to socket %d\n", bchannel->b_sock);
215 bchannel->b_state = (activate)?BSTATE_ACTIVATING:BSTATE_DEACTIVATING;
222 static void bchannel_activated(struct bchannel *bchannel)
226 sock = bchannel->b_sock;
228 /* set dsp features */
229 if (bchannel->b_txdata)
230 ph_control(sock, (bchannel->b_txdata)?DSP_TXDATA_ON:DSP_TXDATA_OFF, 0, "DSP-TXDATA", bchannel->b_txdata, bchannel->b_mode);
231 if (bchannel->b_delay && bchannel->b_mode == 0)
232 ph_control(sock, DSP_DELAY, bchannel->b_delay, "DSP-DELAY", bchannel->b_delay, bchannel->b_mode);
233 if (bchannel->b_tx_dejitter && bchannel->b_mode == 0)
234 ph_control(sock, (bchannel->b_tx_dejitter)?DSP_TX_DEJITTER:DSP_TX_DEJ_OFF, 0, "DSP-TX_DEJITTER", bchannel->b_tx_dejitter, bchannel->b_mode);
235 if (bchannel->b_tx_gain && bchannel->b_mode == 0)
236 ph_control(sock, DSP_VOL_CHANGE_TX, bchannel->b_tx_gain, "DSP-TX_GAIN", bchannel->b_tx_gain, bchannel->b_mode);
237 if (bchannel->b_rx_gain && bchannel->b_mode == 0)
238 ph_control(sock, DSP_VOL_CHANGE_RX, bchannel->b_rx_gain, "DSP-RX_GAIN", bchannel->b_rx_gain, bchannel->b_mode);
239 if (bchannel->b_pipeline[0] && bchannel->b_mode == 0)
240 ph_control_block(sock, DSP_PIPELINE_CFG, bchannel->b_pipeline, strlen(bchannel->b_pipeline)+1, "DSP-PIPELINE", 0, bchannel->b_mode);
241 if (bchannel->b_conf)
242 ph_control(sock, DSP_CONF_JOIN, bchannel->b_conf, "DSP-CONF", bchannel->b_conf, bchannel->b_mode);
243 if (bchannel->b_echo)
244 ph_control(sock, DSP_ECHO_ON, 0, "DSP-ECHO", 1, bchannel->b_mode);
245 if (bchannel->b_tone && bchannel->b_mode == 0)
246 ph_control(sock, DSP_TONE_PATT_ON, bchannel->b_tone, "DSP-TONE", bchannel->b_tone, bchannel->b_mode);
247 if (bchannel->b_rxoff)
248 ph_control(sock, DSP_RECEIVE_OFF, 0, "DSP-RXOFF", 1, bchannel->b_mode);
249 // if (bchannel->b_txmix && bchannel->b_mode == 0)
250 // ph_control(sock, DSP_MIX_ON, 0, "DSP-MIX", 1, bchannel->b_mode);
251 if (bchannel->b_dtmf && bchannel->b_mode == 0)
252 ph_control(sock, DTMF_TONE_START, 0, "DSP-DTMF", 1, bchannel->b_mode);
253 if (bchannel->b_bf_len && bchannel->b_mode == 0)
254 ph_control_block(sock, DSP_BF_ENABLE_KEY, bchannel->b_bf_key, bchannel->b_bf_len, "DSP-CRYPT", bchannel->b_bf_len, bchannel->b_mode);
255 if (bchannel->b_conf)
256 ph_control(sock, DSP_CONF_JOIN, bchannel->b_conf, "DSP-CONF", bchannel->b_conf, bchannel->b_mode);
258 bchannel->b_state = BSTATE_ACTIVE;
264 void bchannel_destroy(struct bchannel *bchannel)
266 if (bchannel->b_sock > -1) {
267 close(bchannel->b_sock);
268 bchannel->b_sock = -1;
270 bchannel->b_state = BSTATE_IDLE;
275 * whenever we get audio data from bchannel, we process it here
277 static void bchannel_receive(struct bchannel *bchannel, unsigned char *buffer, int len)
279 struct mISDNhead *hh = (struct mISDNhead *)buffer;
280 unsigned char *data = buffer + MISDN_HEADER_LEN;
281 unsigned int cont = *((unsigned int *)data);
284 struct bchannel *remote_bchannel;
287 if (hh->prim == PH_CONTROL_IND) {
288 /* non dsp -> ignore ph_control */
289 if (bchannel->b_mode == 1 || bchannel->b_mode == 3)
292 CERROR(bchannel->call, NULL, "SHORT READ OF PH_CONTROL INDICATION\n");
295 if ((cont&(~DTMF_TONE_MASK)) == DTMF_TONE_VAL) {
297 lcr_in_dtmf(bchannel->call, cont & DTMF_TONE_MASK);
302 CERROR(bchannel->call, NULL, "Blowfish crypt rejected.\n");
306 CDEBUG(bchannel->call, NULL, "Blowfish crypt enabled.\n");
310 CDEBUG(bchannel->call, NULL, "Unhandled bchannel control 0x%x.\n", cont);
314 if (hh->prim == PH_DATA_REQ) {
315 if (!bchannel->b_txdata) {
316 /* if tx is off, it may happen that fifos send us pending informations, we just ignore them */
317 CDEBUG(bchannel->call, NULL, "ignoring tx data, because 'txdata' is turned off\n");
322 if (hh->prim != PH_DATA_IND && hh->prim != DL_DATA_IND) {
323 CERROR(bchannel->call, NULL, "Bchannel received unknown primitve: 0x%lx\n", hh->prim);
326 /* if calls are bridged, but not via dsp (no b_conf), forward here */
327 if (!bchannel->b_conf
329 && bchannel->call->bridge_call
330 && bchannel->call->bridge_call->bchannel) {
331 remote_bchannel = bchannel->call->bridge_call->bchannel;
334 char string[4096] = "";
336 sprintf(string+strlen(string), " %02x", data[i]);
339 CDEBUG(remote_bchannel->call, NULL, "Forwarding packet%s\n", string);
341 hh->prim = PH_DATA_REQ;
343 ret = sendto(remote_bchannel->b_sock, buffer, MISDN_HEADER_LEN+len, 0, NULL, 0);
345 CERROR(remote_bchannel->call, NULL, "Failed to send to socket %d\n", bchannel->b_sock);
348 /* calls will not process any audio data unless
349 * the call is connected OR interface features audio during call setup.
352 /* if rx is off, it may happen that fifos send us pending informations, we just ignore them */
353 if (bchannel->b_rxoff) {
354 CDEBUG(bchannel->call, NULL, "ignoring data, because rx is turned off\n");
358 if (!bchannel->call) {
359 CDEBUG(bchannel->call, NULL, "ignoring data, because no call associated with bchannel\n");
362 if (!bchannel->call->audiopath) {
363 /* return, because we have no audio from port */
367 if (bchannel->call->pipe[1] < 0) {
373 if (bchannel->b_mode == 0 || bchannel->b_mode == 1) {
375 for (i = 0; i < len; i++) {
382 len = write(bchannel->call->pipe[1], data, len);
388 close(bchannel->call->pipe[1]);
389 bchannel->call->pipe[1] = -1;
390 CDEBUG(bchannel->call, NULL, "broken pipe on bchannel pipe\n");
395 * transmit data to bchannel
397 void bchannel_transmit(struct bchannel *bchannel, unsigned char *data, int len)
399 unsigned char buff[1024 + MISDN_HEADER_LEN], *p = buff + MISDN_HEADER_LEN;
400 struct mISDNhead *frm = (struct mISDNhead *)buff;
404 if (bchannel->b_state != BSTATE_ACTIVE)
406 if (len > 1024 || len < 1)
408 switch(bchannel->b_mode) {
410 for (i = 0; i < len; i++)
411 *p++ = flip_bits[*data++];
412 frm->prim = DL_DATA_REQ;
415 for (i = 0; i < len; i++)
416 *p++ = flip_bits[*data++];
417 frm->prim = PH_DATA_REQ;
420 memcpy(p, data, len);
421 frm->prim = DL_DATA_REQ;
424 memcpy(p, data, len);
425 frm->prim = PH_DATA_REQ;
429 ret = sendto(bchannel->b_sock, buff, MISDN_HEADER_LEN+len, 0, NULL, 0);
431 CERROR(bchannel->call, NULL, "Failed to send to socket %d\n", bchannel->b_sock);
438 void bchannel_join(struct bchannel *bchannel, unsigned short id)
442 sock = bchannel->b_sock;
444 bchannel->b_conf = (id<<16) + bchannel_pid;
445 bchannel->b_rxoff = 1;
447 bchannel->b_conf = 0;
448 bchannel->b_rxoff = 0;
450 if (bchannel->b_state == BSTATE_ACTIVE) {
451 ph_control(sock, DSP_RECEIVE_OFF, bchannel->b_rxoff, "DSP-RX_OFF", bchannel->b_conf, bchannel->b_mode);
452 ph_control(sock, DSP_CONF_JOIN, bchannel->b_conf, "DSP-CONF", bchannel->b_conf, bchannel->b_mode);
460 void bchannel_dtmf(struct bchannel *bchannel, int on)
464 sock = bchannel->b_sock;
465 bchannel->b_dtmf = on;
466 if (bchannel->b_state == BSTATE_ACTIVE && bchannel->b_mode == 0)
467 ph_control(sock, on?DTMF_TONE_START:DTMF_TONE_STOP, 0, "DSP-DTMF", 1, bchannel->b_mode);
474 void bchannel_blowfish(struct bchannel *bchannel, unsigned char *key, int len)
478 sock = bchannel->b_sock;
479 memcpy(bchannel->b_bf_key, key, len);
480 bchannel->b_bf_len = len;
481 if (bchannel->b_state == BSTATE_ACTIVE)
482 ph_control_block(sock, DSP_BF_ENABLE_KEY, bchannel->b_bf_key, bchannel->b_bf_len, "DSP-CRYPT", bchannel->b_bf_len, bchannel->b_mode);
489 void bchannel_pipeline(struct bchannel *bchannel, char *pipeline)
493 sock = bchannel->b_sock;
494 strncpy(bchannel->b_pipeline, pipeline, sizeof(bchannel->b_pipeline)-1);
495 if (bchannel->b_state == BSTATE_ACTIVE)
496 ph_control_block(sock, DSP_PIPELINE_CFG, bchannel->b_pipeline, strlen(bchannel->b_pipeline)+1, "DSP-PIPELINE", 0, bchannel->b_mode);
503 void bchannel_gain(struct bchannel *bchannel, int gain, int tx)
507 sock = bchannel->b_sock;
509 bchannel->b_tx_gain = gain;
511 bchannel->b_rx_gain = gain;
512 if (bchannel->b_state == BSTATE_ACTIVE && bchannel->b_mode == 0)
513 ph_control(sock, (tx)?DSP_VOL_CHANGE_TX:DSP_VOL_CHANGE_RX, gain, (tx)?"DSP-TX_GAIN":"DSP-RX_GAIN", gain, bchannel->b_mode);
518 * main loop for processing messages from mISDN
520 int bchannel_handle(void)
523 struct bchannel *bchannel;
524 unsigned char buffer[2048+MISDN_HEADER_LEN];
525 struct mISDNhead *hh = (struct mISDNhead *)buffer;
527 /* process all bchannels */
528 bchannel = bchannel_first;
530 /* handle message from bchannel */
531 if (bchannel->b_sock > -1) {
532 ret = recv(bchannel->b_sock, buffer, sizeof(buffer), 0);
533 if (ret >= (int)MISDN_HEADER_LEN) {
536 /* we don't care about confirms, we use rx data to sync tx */
540 /* we receive audio data, we respond to it AND we send tones */
545 bchannel_receive(bchannel, buffer, ret-MISDN_HEADER_LEN);
548 case PH_ACTIVATE_IND:
549 case DL_ESTABLISH_IND:
550 case PH_ACTIVATE_CNF:
551 case DL_ESTABLISH_CNF:
552 CDEBUG(bchannel->call, NULL, "DL_ESTABLISH confirm: bchannel is now activated (socket %d).\n", bchannel->b_sock);
553 bchannel_activated(bchannel);
556 case PH_DEACTIVATE_IND:
558 case PH_DEACTIVATE_CNF:
560 CDEBUG(bchannel->call, NULL, "DL_RELEASE confirm: bchannel is now de-activated (socket %d).\n", bchannel->b_sock);
561 // bchannel_deactivated(bchannel);
565 CERROR(bchannel->call, NULL, "child message not handled: prim(0x%x) socket(%d) data len(%d)\n", hh->prim, bchannel->b_sock, ret - MISDN_HEADER_LEN);
568 if (ret < 0 && errno != EWOULDBLOCK)
569 CERROR(bchannel->call, NULL, "Read from socket %d failed with return code %d\n", bchannel->b_sock, ret);
572 bchannel = bchannel->next;
575 /* if we received at least one b-frame, we will return 1 */
581 * bchannel channel handling
583 struct bchannel *bchannel_first = NULL;
584 struct bchannel *find_bchannel_handle(unsigned int handle)
586 struct bchannel *bchannel = bchannel_first;
589 if (bchannel->handle == handle)
591 bchannel = bchannel->next;
597 struct bchannel *find_bchannel_ref(unsigned int ref)
599 struct bchannel *bchannel = bchannel_first;
602 if (bchannel->ref == ref)
604 bchannel = bchannel->next;
610 struct bchannel *alloc_bchannel(unsigned int handle)
612 struct bchannel **bchannelp = &bchannel_first;
615 bchannelp = &((*bchannelp)->next);
617 *bchannelp = (struct bchannel *)calloc(1, sizeof(struct bchannel));
620 (*bchannelp)->handle = handle;
621 (*bchannelp)->b_state = BSTATE_IDLE;
622 (*bchannelp)->b_sock = -1;
627 void free_bchannel(struct bchannel *bchannel)
629 struct bchannel **temp = &bchannel_first;
632 if (*temp == bchannel) {
633 *temp = (*temp)->next;
634 if (bchannel->b_sock > -1)
635 bchannel_destroy(bchannel);
636 if (bchannel->call) {
637 if (bchannel->call->bchannel)
638 bchannel->call->bchannel = NULL;
643 temp = &((*temp)->next);