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"
60 #ifndef ISDN_PID_L4_B_USER
61 #define ISDN_PID_L4_B_USER 0x440000ff
73 static void bchannel_send_queue(struct bchannel *bchannel);
75 int bchannel_initialize(void)
82 void bchannel_deinitialize(void)
87 * send control information to the channel (dsp-module)
89 static void ph_control(int sock, unsigned int c1, unsigned int c2, char *trace_name, int trace_value, int b_mode)
91 unsigned char buffer[MISDN_HEADER_LEN+sizeof(int)+sizeof(int)];
92 struct mISDNhead *ctrl = (struct mISDNhead *)buffer;
93 unsigned int *d = (unsigned int *)(buffer+MISDN_HEADER_LEN);
96 if (b_mode != 0 && b_mode != 2)
99 CDEBUG(NULL, NULL, "Sending PH_CONTROL %s %x,%x\n", trace_name, c1, c2);
100 ctrl->prim = PH_CONTROL_REQ;
104 ret = sendto(sock, buffer, MISDN_HEADER_LEN+sizeof(int)*2, 0, NULL, 0);
106 CERROR(NULL, NULL, "Failed to send to socket %d\n", sock);
109 static void ph_control_block(int sock, unsigned int c1, void *c2, int c2_len, char *trace_name, int trace_value, int b_mode)
111 unsigned char buffer[MISDN_HEADER_LEN+sizeof(int)+c2_len];
112 struct mISDNhead *ctrl = (struct mISDNhead *)buffer;
113 unsigned int *d = (unsigned int *)(buffer+MISDN_HEADER_LEN);
116 if (b_mode != 0 && b_mode != 2)
119 CDEBUG(NULL, NULL, "Sending PH_CONTROL (block) %s %x\n", trace_name, c1);
120 ctrl->prim = PH_CONTROL_REQ;
123 memcpy(d, c2, c2_len);
124 ret = sendto(sock, buffer, MISDN_HEADER_LEN+sizeof(int)+c2_len, 0, NULL, 0);
126 CERROR(NULL, NULL, "Failed to send to socket %d\n", sock);
129 static int bchannel_handle(struct lcr_fd *fd, unsigned int what, void *instance, int index);
134 int bchannel_create(struct bchannel *bchannel, int mode, int queue)
137 struct sockaddr_mISDN addr;
139 if (bchannel->b_sock > -1) {
140 CERROR(bchannel->call, NULL, "Socket already created for handle 0x%x\n", bchannel->handle);
145 bchannel->b_mode = (mode & 3);
146 switch(bchannel->b_mode) {
148 CDEBUG(bchannel->call, NULL, "Open DSP audio\n");
149 bchannel->b_sock = socket(PF_ISDN, SOCK_DGRAM, ISDN_P_B_L2DSP);
152 CDEBUG(bchannel->call, NULL, "Open audio\n");
153 bchannel->b_sock = socket(PF_ISDN, SOCK_DGRAM, ISDN_P_B_RAW);
156 CDEBUG(bchannel->call, NULL, "Open DSP HDLC\n");
157 bchannel->b_sock = socket(PF_ISDN, SOCK_DGRAM, ISDN_P_B_L2DSPHDLC);
160 CDEBUG(bchannel->call, NULL, "Open HDLC\n");
161 bchannel->b_sock = socket(PF_ISDN, SOCK_DGRAM, ISDN_P_B_HDLC);
164 if (bchannel->b_sock < 0) {
165 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);
170 memset(&bchannel->lcr_fd, 0, sizeof(bchannel->lcr_fd));
171 bchannel->lcr_fd.fd = bchannel->b_sock;
172 register_fd(&bchannel->lcr_fd, LCR_FD_READ | LCR_FD_EXCEPT, bchannel_handle, bchannel, 0);
174 /* bind socket to bchannel */
175 addr.family = AF_ISDN;
176 addr.dev = (bchannel->handle>>8);
177 addr.channel = bchannel->handle & 0xff;
178 ret = bind(bchannel->b_sock, (struct sockaddr *)&addr, sizeof(addr));
180 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);
181 unregister_fd(&bchannel->lcr_fd);
182 close(bchannel->b_sock);
183 bchannel->b_sock = -1;
188 if (bchannel->b_mode == 1 && queue) {
189 bchannel->nodsp_queue_out = 0;
190 bchannel->nodsp_queue_in = queue * 8;
191 if (bchannel->nodsp_queue_in > QUEUE_BUFFER_MAX-1)
192 bchannel->nodsp_queue_in = QUEUE_BUFFER_MAX-1;
193 bchannel->nodsp_queue = bchannel->nodsp_queue_in; /* store initial load */
194 memset(&bchannel->nodsp_queue_buffer, (options.law=='a')?0x2a:0xff, QUEUE_BUFFER_SIZE);
195 bchannel->queue_sent = 0;
197 bchannel->nodsp_queue = 0;
204 * activate / deactivate request
206 void bchannel_activate(struct bchannel *bchannel, int activate)
208 struct mISDNhead act;
211 /* activate bchannel */
212 CDEBUG(bchannel->call, NULL, "%sActivating B-channel.\n", activate?"":"De-");
213 switch(bchannel->b_mode) {
216 act.prim = (activate)?DL_ESTABLISH_REQ:DL_RELEASE_REQ;
220 act.prim = (activate)?PH_ACTIVATE_REQ:PH_DEACTIVATE_REQ;
224 ret = sendto(bchannel->b_sock, &act, MISDN_HEADER_LEN, 0, NULL, 0);
226 CERROR(bchannel->call, NULL, "Failed to send to socket %d\n", bchannel->b_sock);
228 bchannel->b_state = (activate)?BSTATE_ACTIVATING:BSTATE_DEACTIVATING;
235 static void bchannel_activated(struct bchannel *bchannel)
239 sock = bchannel->b_sock;
241 /* set dsp features */
242 if (bchannel->b_txdata)
243 ph_control(sock, (bchannel->b_txdata)?DSP_TXDATA_ON:DSP_TXDATA_OFF, 0, "DSP-TXDATA", bchannel->b_txdata, bchannel->b_mode);
244 if (bchannel->b_delay && bchannel->b_mode == 0)
245 ph_control(sock, DSP_DELAY, bchannel->b_delay, "DSP-DELAY", bchannel->b_delay, bchannel->b_mode);
246 if (bchannel->b_tx_dejitter && bchannel->b_mode == 0)
247 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);
248 if (bchannel->b_tx_gain && bchannel->b_mode == 0)
249 ph_control(sock, DSP_VOL_CHANGE_TX, bchannel->b_tx_gain, "DSP-TX_GAIN", bchannel->b_tx_gain, bchannel->b_mode);
250 if (bchannel->b_rx_gain && bchannel->b_mode == 0)
251 ph_control(sock, DSP_VOL_CHANGE_RX, bchannel->b_rx_gain, "DSP-RX_GAIN", bchannel->b_rx_gain, bchannel->b_mode);
252 if (bchannel->b_pipeline[0] && bchannel->b_mode == 0)
253 ph_control_block(sock, DSP_PIPELINE_CFG, bchannel->b_pipeline, strlen(bchannel->b_pipeline)+1, "DSP-PIPELINE", 0, bchannel->b_mode);
254 if (bchannel->b_conf)
255 ph_control(sock, DSP_CONF_JOIN, bchannel->b_conf, "DSP-CONF", bchannel->b_conf, bchannel->b_mode);
256 if (bchannel->b_echo)
257 ph_control(sock, DSP_ECHO_ON, 0, "DSP-ECHO", 1, bchannel->b_mode);
258 if (bchannel->b_tone && bchannel->b_mode == 0)
259 ph_control(sock, DSP_TONE_PATT_ON, bchannel->b_tone, "DSP-TONE", bchannel->b_tone, bchannel->b_mode);
260 if (bchannel->b_rxoff)
261 ph_control(sock, DSP_RECEIVE_OFF, 0, "DSP-RXOFF", 1, bchannel->b_mode);
262 // if (bchannel->b_txmix && bchannel->b_mode == 0)
263 // ph_control(sock, DSP_MIX_ON, 0, "DSP-MIX", 1, bchannel->b_mode);
264 if (bchannel->b_dtmf && bchannel->b_mode == 0)
265 ph_control(sock, DTMF_TONE_START, 0, "DSP-DTMF", 1, bchannel->b_mode);
266 if (bchannel->b_bf_len && bchannel->b_mode == 0)
267 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);
268 if (bchannel->b_conf)
269 ph_control(sock, DSP_CONF_JOIN, bchannel->b_conf, "DSP-CONF", bchannel->b_conf, bchannel->b_mode);
271 bchannel->b_state = BSTATE_ACTIVE;
277 void bchannel_destroy(struct bchannel *bchannel)
279 if (bchannel->b_sock > -1) {
280 unregister_fd(&bchannel->lcr_fd);
281 close(bchannel->b_sock);
282 bchannel->b_sock = -1;
284 bchannel->b_state = BSTATE_IDLE;
289 * whenever we get audio data from bchannel, we process it here
291 static void bchannel_receive(struct bchannel *bchannel, unsigned char *buffer, int len)
293 struct mISDNhead *hh = (struct mISDNhead *)buffer;
294 unsigned char *data = buffer + MISDN_HEADER_LEN;
295 unsigned int cont = *((unsigned int *)data);
298 struct bchannel *remote_bchannel;
301 if (hh->prim == PH_CONTROL_IND) {
302 /* non dsp -> ignore ph_control */
303 if (bchannel->b_mode == 1 || bchannel->b_mode == 3)
306 CERROR(bchannel->call, NULL, "SHORT READ OF PH_CONTROL INDICATION\n");
309 if ((cont&(~DTMF_TONE_MASK)) == DTMF_TONE_VAL) {
311 lcr_in_dtmf(bchannel->call, cont & DTMF_TONE_MASK);
316 CERROR(bchannel->call, NULL, "Blowfish crypt rejected.\n");
320 CDEBUG(bchannel->call, NULL, "Blowfish crypt enabled.\n");
324 CDEBUG(bchannel->call, NULL, "Unhandled bchannel control 0x%x.\n", cont);
328 if (hh->prim == PH_DATA_REQ) {
329 if (!bchannel->b_txdata) {
330 /* if tx is off, it may happen that fifos send us pending informations, we just ignore them */
331 CDEBUG(bchannel->call, NULL, "ignoring tx data, because 'txdata' is turned off\n");
336 if (hh->prim != PH_DATA_IND && hh->prim != DL_DATA_IND) {
337 CERROR(bchannel->call, NULL, "Bchannel received unknown primitve: 0x%lx\n", hh->prim);
340 /* if calls are bridged, but not via dsp (no b_conf), forward here */
341 if (!bchannel->b_conf
343 && bchannel->call->bridge_call
344 && bchannel->call->bridge_call->bchannel) {
345 remote_bchannel = bchannel->call->bridge_call->bchannel;
348 char string[4096] = "";
350 sprintf(string+strlen(string), " %02x", data[i]);
353 CDEBUG(remote_bchannel->call, NULL, "Forwarding packet%s\n", string);
355 hh->prim = PH_DATA_REQ;
357 ret = sendto(remote_bchannel->b_sock, buffer, MISDN_HEADER_LEN+len, 0, NULL, 0);
359 CERROR(remote_bchannel->call, NULL, "Failed to send to socket %d\n", bchannel->b_sock);
362 /* calls will not process any audio data unless
363 * the call is connected OR interface features audio during call setup.
366 /* if rx is off, it may happen that fifos send us pending informations, we just ignore them */
367 if (bchannel->b_rxoff) {
368 CDEBUG(bchannel->call, NULL, "ignoring data, because rx is turned off\n");
372 if (!bchannel->call) {
373 CDEBUG(bchannel->call, NULL, "ignoring data, because no call associated with bchannel\n");
376 if (!bchannel->call->audiopath) {
377 /* return, because we have no audio from port */
381 if (bchannel->call->pipe[1] < 0) {
387 if (bchannel->b_mode == 0 || bchannel->b_mode == 1) {
389 for (i = 0; i < len; i++) {
396 len = write(bchannel->call->pipe[1], data, len);
402 close(bchannel->call->pipe[1]);
403 bchannel->call->pipe[1] = -1;
404 CDEBUG(bchannel->call, NULL, "broken pipe on bchannel pipe\n");
409 * transmit data to bchannel
411 void bchannel_transmit(struct bchannel *bchannel, unsigned char *data, int len)
413 unsigned char buff[1024 + MISDN_HEADER_LEN], *p = buff + MISDN_HEADER_LEN;
414 struct mISDNhead *frm = (struct mISDNhead *)buff;
419 if (bchannel->b_state != BSTATE_ACTIVE)
421 if (len > 1024 || len < 1)
423 switch(bchannel->b_mode) {
425 for (i = 0; i < len; i++)
426 *p++ = flip_bits[*data++];
427 frm->prim = DL_DATA_REQ;
430 for (i = 0; i < len; i++)
431 *p++ = flip_bits[*data++];
432 frm->prim = PH_DATA_REQ;
435 memcpy(p, data, len);
436 frm->prim = DL_DATA_REQ;
439 memcpy(p, data, len);
440 frm->prim = PH_DATA_REQ;
445 unsigned char test_tone[8] = {0x2a, 0x24, 0xb4, 0x24, 0x2a, 0x25, 0xb5, 0x25};
446 p = buff + MISDN_HEADER_LEN;
447 for (i = 0; i < len; i++)
448 *p++ = test_tone[(bchannel->test + i) & 7];
449 bchannel->test = (bchannel->test + len) & 7;
451 if (bchannel->nodsp_queue) {
452 space = (bchannel->nodsp_queue_out - bchannel->nodsp_queue_in - 1) & (QUEUE_BUFFER_SIZE - 1);
454 CERROR(bchannel->call, NULL, "Queue buffer overflow, space is %d, len is %d.\n", space, len);
457 p = buff + MISDN_HEADER_LEN;
458 in = bchannel->nodsp_queue_in;
459 for (i = 0; i < len; i++) {
460 bchannel->nodsp_queue_buffer[in] = *p++;
461 in = (in + 1) & (QUEUE_BUFFER_SIZE - 1);
463 bchannel->nodsp_queue_in = in;
464 if (bchannel->queue_sent == 0) /* if there is no pending data */
465 bchannel_send_queue(bchannel);
468 ret = sendto(bchannel->b_sock, buff, MISDN_HEADER_LEN+len, 0, NULL, 0);
470 CERROR(bchannel->call, NULL, "Failed to send to socket %d\n", bchannel->b_sock);
475 * in case of a send queue, we send from that queue rather directly
477 static void bchannel_send_queue(struct bchannel *bchannel)
479 unsigned char buff[1024 + MISDN_HEADER_LEN], *p = buff + MISDN_HEADER_LEN;
480 struct mISDNhead *frm = (struct mISDNhead *)buff;
485 len = (bchannel->nodsp_queue_in - bchannel->nodsp_queue_out) & (QUEUE_BUFFER_SIZE - 1);
487 return; /* mISDN driver received all load */
489 printf("%4d:(%s|%s)\n", bchannel->nodsp_queue_out,
490 "----------------------------------------------------------------"+64-len/(8192/64),
495 frm->prim = PH_DATA_REQ;
497 out = bchannel->nodsp_queue_out;
498 for (i = 0; i < len; i++) {
499 *p++ = bchannel->nodsp_queue_buffer[out];
500 out = (out + 1) & (QUEUE_BUFFER_SIZE - 1);
502 bchannel->nodsp_queue_out = out;
503 ret = sendto(bchannel->b_sock, buff, MISDN_HEADER_LEN+len, 0, NULL, 0);
505 CERROR(bchannel->call, NULL, "Failed to send to socket %d\n", bchannel->b_sock);
507 bchannel->queue_sent = 1;
514 void bchannel_join(struct bchannel *bchannel, unsigned short id)
518 sock = bchannel->b_sock;
520 bchannel->b_conf = (id<<16) + bchannel_pid;
521 bchannel->b_rxoff = 1;
523 bchannel->b_conf = 0;
524 bchannel->b_rxoff = 0;
526 if (bchannel->b_state == BSTATE_ACTIVE) {
527 ph_control(sock, DSP_RECEIVE_OFF, bchannel->b_rxoff, "DSP-RX_OFF", bchannel->b_conf, bchannel->b_mode);
528 ph_control(sock, DSP_CONF_JOIN, bchannel->b_conf, "DSP-CONF", bchannel->b_conf, bchannel->b_mode);
536 void bchannel_dtmf(struct bchannel *bchannel, int on)
540 sock = bchannel->b_sock;
541 bchannel->b_dtmf = on;
542 if (bchannel->b_state == BSTATE_ACTIVE && bchannel->b_mode == 0)
543 ph_control(sock, on?DTMF_TONE_START:DTMF_TONE_STOP, 0, "DSP-DTMF", 1, bchannel->b_mode);
550 void bchannel_blowfish(struct bchannel *bchannel, unsigned char *key, int len)
554 sock = bchannel->b_sock;
555 memcpy(bchannel->b_bf_key, key, len);
556 bchannel->b_bf_len = len;
557 if (bchannel->b_state == BSTATE_ACTIVE)
558 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);
565 void bchannel_pipeline(struct bchannel *bchannel, char *pipeline)
569 sock = bchannel->b_sock;
570 strncpy(bchannel->b_pipeline, pipeline, sizeof(bchannel->b_pipeline)-1);
571 if (bchannel->b_state == BSTATE_ACTIVE)
572 ph_control_block(sock, DSP_PIPELINE_CFG, bchannel->b_pipeline, strlen(bchannel->b_pipeline)+1, "DSP-PIPELINE", 0, bchannel->b_mode);
579 void bchannel_gain(struct bchannel *bchannel, int gain, int tx)
583 sock = bchannel->b_sock;
585 bchannel->b_tx_gain = gain;
587 bchannel->b_rx_gain = gain;
588 if (bchannel->b_state == BSTATE_ACTIVE && bchannel->b_mode == 0)
589 ph_control(sock, (tx)?DSP_VOL_CHANGE_TX:DSP_VOL_CHANGE_RX, gain, (tx)?"DSP-TX_GAIN":"DSP-RX_GAIN", gain, bchannel->b_mode);
594 * main loop for processing messages from mISDN
596 static int bchannel_handle(struct lcr_fd *fd, unsigned int what, void *instance, int index)
598 struct bchannel *bchannel = (struct bchannel *)instance;
600 unsigned char buffer[2048+MISDN_HEADER_LEN];
601 struct mISDNhead *hh = (struct mISDNhead *)buffer;
603 ret = recv(bchannel->b_sock, buffer, sizeof(buffer), 0);
604 if (ret >= (int)MISDN_HEADER_LEN) {
606 /* after a confim, we can send more from queue */
608 if (bchannel->nodsp_queue) {
609 bchannel->queue_sent = 0;
610 bchannel_send_queue(bchannel);
614 /* we receive audio data, we respond to it AND we send tones */
619 bchannel_receive(bchannel, buffer, ret-MISDN_HEADER_LEN);
622 case PH_ACTIVATE_IND:
623 case DL_ESTABLISH_IND:
624 case PH_ACTIVATE_CNF:
625 case DL_ESTABLISH_CNF:
626 CDEBUG(bchannel->call, NULL, "DL_ESTABLISH confirm: bchannel is now activated (socket %d).\n", bchannel->b_sock);
627 bchannel_activated(bchannel);
630 case PH_DEACTIVATE_IND:
632 case PH_DEACTIVATE_CNF:
634 CDEBUG(bchannel->call, NULL, "DL_RELEASE confirm: bchannel is now de-activated (socket %d).\n", bchannel->b_sock);
635 // bchannel_deactivated(bchannel);
639 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);
642 // if (ret < 0 && errno != EWOULDBLOCK)
643 CERROR(bchannel->call, NULL, "Read from socket %d failed with return code %d\n", bchannel->b_sock, ret);
646 /* if we received at least one b-frame, we will return 1 */
652 * bchannel channel handling
654 struct bchannel *bchannel_first = NULL;
655 struct bchannel *find_bchannel_handle(unsigned int handle)
657 struct bchannel *bchannel = bchannel_first;
660 if (bchannel->handle == handle)
662 bchannel = bchannel->next;
668 struct bchannel *find_bchannel_ref(unsigned int ref)
670 struct bchannel *bchannel = bchannel_first;
673 if (bchannel->ref == ref)
675 bchannel = bchannel->next;
681 struct bchannel *alloc_bchannel(unsigned int handle)
683 struct bchannel **bchannelp = &bchannel_first;
686 bchannelp = &((*bchannelp)->next);
688 *bchannelp = (struct bchannel *)calloc(1, sizeof(struct bchannel));
691 (*bchannelp)->handle = handle;
692 (*bchannelp)->b_state = BSTATE_IDLE;
693 (*bchannelp)->b_sock = -1;
698 void free_bchannel(struct bchannel *bchannel)
700 struct bchannel **temp = &bchannel_first;
703 if (*temp == bchannel) {
704 *temp = (*temp)->next;
705 if (bchannel->b_sock > -1)
706 bchannel_destroy(bchannel);
707 if (bchannel->call) {
708 if (bchannel->call->bchannel)
709 bchannel->call->bchannel = NULL;
714 temp = &((*temp)->next);