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>
26 #include <mISDN/mISDNif.h>
28 #include <mISDN/mISDNcompat.h>
29 int __af_isdn = MISDN_AF_ISDN;
30 #include <mISDN/q931.h>
32 #define HAVE_ATTRIBUTE_always_inline 1
33 #define HAVE_ARPA_INET_H 1
34 #define HAVE_TIMERSUB 1
36 #include <asterisk/autoconfig.h>
37 #include <asterisk/compiler.h>
38 #include <asterisk/frame.h>
40 /* Choose if you want to have chan_lcr for Asterisk 1.4.x or CallWeaver 1.2.x */
41 /* #define LCR_FOR_CALLWEAVER */
43 #ifdef LCR_FOR_CALLWEAVER
44 #include <asterisk/phone_no_utils.h>
45 #include <asterisk/logger.h>
46 #include <asterisk/module.h>
47 #include <asterisk/channel.h>
50 #include "extension.h"
52 #include "lcrsocket.h"
61 #ifndef ISDN_PID_L4_B_USER
62 #define ISDN_PID_L4_B_USER 0x440000ff
74 static void bchannel_send_queue(struct bchannel *bchannel);
76 int bchannel_initialize(void)
81 void bchannel_deinitialize(void)
86 * send control information to the channel (dsp-module)
88 static void ph_control(int sock, unsigned int c1, unsigned int c2, char *trace_name, int trace_value, int b_mode)
90 unsigned char buffer[MISDN_HEADER_LEN+sizeof(int)+sizeof(int)];
91 struct mISDNhead *ctrl = (struct mISDNhead *)buffer;
92 unsigned int *d = (unsigned int *)(buffer+MISDN_HEADER_LEN);
95 if (b_mode != 0 && b_mode != 2)
98 CDEBUG(NULL, NULL, "Sending PH_CONTROL %s %x,%x\n", trace_name, c1, c2);
99 ctrl->prim = PH_CONTROL_REQ;
103 ret = sendto(sock, buffer, MISDN_HEADER_LEN+sizeof(int)*2, 0, NULL, 0);
105 CERROR(NULL, NULL, "Failed to send to socket %d\n", sock);
108 static void ph_control_block(int sock, unsigned int c1, void *c2, int c2_len, char *trace_name, int trace_value, int b_mode)
110 unsigned char buffer[MISDN_HEADER_LEN+sizeof(int)+c2_len];
111 struct mISDNhead *ctrl = (struct mISDNhead *)buffer;
112 unsigned int *d = (unsigned int *)(buffer+MISDN_HEADER_LEN);
115 if (b_mode != 0 && b_mode != 2)
118 CDEBUG(NULL, NULL, "Sending PH_CONTROL (block) %s %x\n", trace_name, c1);
119 ctrl->prim = PH_CONTROL_REQ;
122 memcpy(d, c2, c2_len);
123 ret = sendto(sock, buffer, MISDN_HEADER_LEN+sizeof(int)+c2_len, 0, NULL, 0);
125 CERROR(NULL, NULL, "Failed to send to socket %d\n", sock);
128 static int bchannel_handle(struct lcr_fd *fd, unsigned int what, void *instance, int index);
133 int bchannel_create(struct bchannel *bchannel, int mode, int queue)
136 struct sockaddr_mISDN addr;
138 if (bchannel->b_sock > -1) {
139 CERROR(bchannel->call, NULL, "Socket already created for handle 0x%x\n", bchannel->handle);
144 bchannel->b_mode = (mode & 3);
145 switch(bchannel->b_mode) {
147 CDEBUG(bchannel->call, NULL, "Open DSP audio\n");
148 bchannel->b_sock = socket(PF_ISDN, SOCK_DGRAM, ISDN_P_B_L2DSP);
151 CDEBUG(bchannel->call, NULL, "Open audio\n");
152 bchannel->b_sock = socket(PF_ISDN, SOCK_DGRAM, ISDN_P_B_RAW);
155 CDEBUG(bchannel->call, NULL, "Open DSP HDLC\n");
156 bchannel->b_sock = socket(PF_ISDN, SOCK_DGRAM, ISDN_P_B_L2DSPHDLC);
159 CDEBUG(bchannel->call, NULL, "Open HDLC\n");
160 bchannel->b_sock = socket(PF_ISDN, SOCK_DGRAM, ISDN_P_B_HDLC);
163 if (bchannel->b_sock < 0) {
164 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);
169 memset(&bchannel->lcr_fd, 0, sizeof(bchannel->lcr_fd));
170 bchannel->lcr_fd.fd = bchannel->b_sock;
171 register_fd(&bchannel->lcr_fd, LCR_FD_READ | LCR_FD_EXCEPT, bchannel_handle, bchannel, 0);
173 /* bind socket to bchannel */
174 addr.family = AF_ISDN;
175 addr.dev = (bchannel->handle>>8);
176 addr.channel = bchannel->handle & 0xff;
177 ret = bind(bchannel->b_sock, (struct sockaddr *)&addr, sizeof(addr));
179 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);
180 unregister_fd(&bchannel->lcr_fd);
181 close(bchannel->b_sock);
182 bchannel->b_sock = -1;
187 if (bchannel->b_mode == 1 && queue) {
188 bchannel->nodsp_queue_out = 0;
189 bchannel->nodsp_queue_in = queue * 8;
190 if (bchannel->nodsp_queue_in > QUEUE_BUFFER_MAX-1)
191 bchannel->nodsp_queue_in = QUEUE_BUFFER_MAX-1;
192 bchannel->nodsp_queue = bchannel->nodsp_queue_in; /* store initial load */
193 memset(&bchannel->nodsp_queue_buffer, (options.law=='a')?0x2a:0xff, QUEUE_BUFFER_SIZE);
194 bchannel->queue_sent = 0;
196 bchannel->nodsp_queue = 0;
203 * activate / deactivate request
205 void bchannel_activate(struct bchannel *bchannel, int activate)
207 struct mISDNhead act;
210 /* activate bchannel */
211 CDEBUG(bchannel->call, NULL, "%sActivating B-channel.\n", activate?"":"De-");
212 switch(bchannel->b_mode) {
215 act.prim = (activate)?DL_ESTABLISH_REQ:DL_RELEASE_REQ;
219 act.prim = (activate)?PH_ACTIVATE_REQ:PH_DEACTIVATE_REQ;
223 ret = sendto(bchannel->b_sock, &act, MISDN_HEADER_LEN, 0, NULL, 0);
225 CERROR(bchannel->call, NULL, "Failed to send to socket %d\n", bchannel->b_sock);
227 bchannel->b_state = (activate)?BSTATE_ACTIVATING:BSTATE_DEACTIVATING;
234 static void bchannel_activated(struct bchannel *bchannel)
238 sock = bchannel->b_sock;
240 /* set dsp features */
241 if (bchannel->b_txdata)
242 ph_control(sock, (bchannel->b_txdata)?DSP_TXDATA_ON:DSP_TXDATA_OFF, 0, "DSP-TXDATA", bchannel->b_txdata, bchannel->b_mode);
243 if (bchannel->b_delay && bchannel->b_mode == 0)
244 ph_control(sock, DSP_DELAY, bchannel->b_delay, "DSP-DELAY", bchannel->b_delay, bchannel->b_mode);
245 if (bchannel->b_tx_dejitter && bchannel->b_mode == 0)
246 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);
247 if (bchannel->b_tx_gain && bchannel->b_mode == 0)
248 ph_control(sock, DSP_VOL_CHANGE_TX, bchannel->b_tx_gain, "DSP-TX_GAIN", bchannel->b_tx_gain, bchannel->b_mode);
249 if (bchannel->b_rx_gain && bchannel->b_mode == 0)
250 ph_control(sock, DSP_VOL_CHANGE_RX, bchannel->b_rx_gain, "DSP-RX_GAIN", bchannel->b_rx_gain, bchannel->b_mode);
251 if (bchannel->b_pipeline[0] && bchannel->b_mode == 0)
252 ph_control_block(sock, DSP_PIPELINE_CFG, bchannel->b_pipeline, strlen(bchannel->b_pipeline)+1, "DSP-PIPELINE", 0, bchannel->b_mode);
253 if (bchannel->b_conf)
254 ph_control(sock, DSP_CONF_JOIN, bchannel->b_conf, "DSP-CONF", bchannel->b_conf, bchannel->b_mode);
255 if (bchannel->b_echo)
256 ph_control(sock, DSP_ECHO_ON, 0, "DSP-ECHO", 1, bchannel->b_mode);
257 if (bchannel->b_tone && bchannel->b_mode == 0)
258 ph_control(sock, DSP_TONE_PATT_ON, bchannel->b_tone, "DSP-TONE", bchannel->b_tone, bchannel->b_mode);
259 if (bchannel->b_rxoff)
260 ph_control(sock, DSP_RECEIVE_OFF, 0, "DSP-RXOFF", 1, bchannel->b_mode);
261 // if (bchannel->b_txmix && bchannel->b_mode == 0)
262 // ph_control(sock, DSP_MIX_ON, 0, "DSP-MIX", 1, bchannel->b_mode);
263 if (bchannel->b_dtmf && bchannel->b_mode == 0)
264 ph_control(sock, DTMF_TONE_START, 0, "DSP-DTMF", 1, bchannel->b_mode);
265 if (bchannel->b_bf_len && bchannel->b_mode == 0)
266 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);
267 if (bchannel->b_conf)
268 ph_control(sock, DSP_CONF_JOIN, bchannel->b_conf, "DSP-CONF", bchannel->b_conf, bchannel->b_mode);
270 bchannel->b_state = BSTATE_ACTIVE;
276 void bchannel_destroy(struct bchannel *bchannel)
278 if (bchannel->b_sock > -1) {
279 unregister_fd(&bchannel->lcr_fd);
280 close(bchannel->b_sock);
281 bchannel->b_sock = -1;
283 bchannel->b_state = BSTATE_IDLE;
288 * whenever we get audio data from bchannel, we process it here
290 static void bchannel_receive(struct bchannel *bchannel, unsigned char *buffer, int len)
292 struct mISDNhead *hh = (struct mISDNhead *)buffer;
293 unsigned char *data = buffer + MISDN_HEADER_LEN;
294 unsigned int cont = *((unsigned int *)data);
297 struct bchannel *remote_bchannel;
300 if (hh->prim == PH_CONTROL_IND) {
301 /* non dsp -> ignore ph_control */
302 if (bchannel->b_mode == 1 || bchannel->b_mode == 3)
305 CERROR(bchannel->call, NULL, "SHORT READ OF PH_CONTROL INDICATION\n");
308 if ((cont&(~DTMF_TONE_MASK)) == DTMF_TONE_VAL) {
310 lcr_in_dtmf(bchannel->call, cont & DTMF_TONE_MASK);
315 CERROR(bchannel->call, NULL, "Blowfish crypt rejected.\n");
319 CDEBUG(bchannel->call, NULL, "Blowfish crypt enabled.\n");
323 CDEBUG(bchannel->call, NULL, "Unhandled bchannel control 0x%x.\n", cont);
327 if (hh->prim == PH_DATA_REQ) {
328 if (!bchannel->b_txdata) {
329 /* if tx is off, it may happen that fifos send us pending informations, we just ignore them */
330 CDEBUG(bchannel->call, NULL, "ignoring tx data, because 'txdata' is turned off\n");
335 if (hh->prim != PH_DATA_IND && hh->prim != DL_DATA_IND) {
336 CERROR(bchannel->call, NULL, "Bchannel received unknown primitve: 0x%lx\n", hh->prim);
339 /* if calls are bridged, but not via dsp (no b_conf), forward here */
340 if (!bchannel->b_conf
342 && bchannel->call->bridge_call
343 && bchannel->call->bridge_call->bchannel) {
344 remote_bchannel = bchannel->call->bridge_call->bchannel;
347 char string[4096] = "";
349 sprintf(string+strlen(string), " %02x", data[i]);
352 CDEBUG(remote_bchannel->call, NULL, "Forwarding packet%s\n", string);
354 hh->prim = PH_DATA_REQ;
356 ret = sendto(remote_bchannel->b_sock, buffer, MISDN_HEADER_LEN+len, 0, NULL, 0);
358 CERROR(remote_bchannel->call, NULL, "Failed to send to socket %d\n", bchannel->b_sock);
361 /* calls will not process any audio data unless
362 * the call is connected OR interface features audio during call setup.
365 /* if rx is off, it may happen that fifos send us pending informations, we just ignore them */
366 if (bchannel->b_rxoff) {
367 CDEBUG(bchannel->call, NULL, "ignoring data, because rx is turned off\n");
371 if (!bchannel->call) {
372 CDEBUG(bchannel->call, NULL, "ignoring data, because no call associated with bchannel\n");
375 if (!bchannel->call->audiopath) {
376 /* return, because we have no audio from port */
380 if (bchannel->call->pipe[1] < 0) {
386 if (bchannel->b_mode == 0 || bchannel->b_mode == 1) {
388 for (i = 0; i < len; i++) {
395 len = write(bchannel->call->pipe[1], data, len);
401 close(bchannel->call->pipe[1]);
402 bchannel->call->pipe[1] = -1;
403 CDEBUG(bchannel->call, NULL, "broken pipe on bchannel pipe\n");
408 * transmit data to bchannel
410 void bchannel_transmit(struct bchannel *bchannel, unsigned char *data, int len)
412 unsigned char buff[1024 + MISDN_HEADER_LEN], *p = buff + MISDN_HEADER_LEN;
413 struct mISDNhead *frm = (struct mISDNhead *)buff;
418 if (bchannel->b_state != BSTATE_ACTIVE)
420 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;
444 memset(p, flip_bits[(options.law=='a')?0x2a:0xff], len);
447 unsigned char test_tone[8] = {0x2a, 0x24, 0xb4, 0x24, 0x2a, 0x25, 0xb5, 0x25};
448 p = buff + MISDN_HEADER_LEN;
449 for (i = 0; i < len; i++)
450 *p++ = test_tone[(bchannel->test + i) & 7];
451 bchannel->test = (bchannel->test + len) & 7;
453 if (bchannel->nodsp_queue) {
454 space = (bchannel->nodsp_queue_out - bchannel->nodsp_queue_in - 1) & (QUEUE_BUFFER_SIZE - 1);
456 CERROR(bchannel->call, NULL, "Queue buffer overflow, space is %d, len is %d.\n", space, len);
459 p = buff + MISDN_HEADER_LEN;
460 in = bchannel->nodsp_queue_in;
461 for (i = 0; i < len; i++) {
462 bchannel->nodsp_queue_buffer[in] = *p++;
463 in = (in + 1) & (QUEUE_BUFFER_SIZE - 1);
465 bchannel->nodsp_queue_in = in;
466 if (bchannel->queue_sent == 0) /* if there is no pending data */
467 bchannel_send_queue(bchannel);
470 ret = sendto(bchannel->b_sock, buff, MISDN_HEADER_LEN+len, 0, NULL, 0);
472 CERROR(bchannel->call, NULL, "Failed to send to socket %d\n", bchannel->b_sock);
477 * in case of a send queue, we send from that queue rather directly
479 static void bchannel_send_queue(struct bchannel *bchannel)
481 unsigned char buff[1024 + MISDN_HEADER_LEN], *p = buff + MISDN_HEADER_LEN;
482 struct mISDNhead *frm = (struct mISDNhead *)buff;
487 len = (bchannel->nodsp_queue_in - bchannel->nodsp_queue_out) & (QUEUE_BUFFER_SIZE - 1);
489 return; /* mISDN driver received all load */
491 printf("%4d:(%s|%s)\n", bchannel->nodsp_queue_out,
492 "----------------------------------------------------------------"+64-len/(8192/64),
497 frm->prim = PH_DATA_REQ;
499 out = bchannel->nodsp_queue_out;
500 for (i = 0; i < len; i++) {
501 *p++ = bchannel->nodsp_queue_buffer[out];
502 out = (out + 1) & (QUEUE_BUFFER_SIZE - 1);
504 bchannel->nodsp_queue_out = out;
505 ret = sendto(bchannel->b_sock, buff, MISDN_HEADER_LEN+len, 0, NULL, 0);
507 CERROR(bchannel->call, NULL, "Failed to send to socket %d\n", bchannel->b_sock);
509 bchannel->queue_sent = 1;
516 void bchannel_join(struct bchannel *bchannel, unsigned short id)
520 sock = bchannel->b_sock;
522 bchannel->b_conf = (id<<16) + bchannel_pid;
523 bchannel->b_rxoff = 1;
525 bchannel->b_conf = 0;
526 bchannel->b_rxoff = 0;
528 if (bchannel->b_state == BSTATE_ACTIVE) {
529 ph_control(sock, DSP_RECEIVE_OFF, bchannel->b_rxoff, "DSP-RX_OFF", bchannel->b_conf, bchannel->b_mode);
530 ph_control(sock, DSP_CONF_JOIN, bchannel->b_conf, "DSP-CONF", bchannel->b_conf, bchannel->b_mode);
538 void bchannel_dtmf(struct bchannel *bchannel, int on)
542 sock = bchannel->b_sock;
543 bchannel->b_dtmf = on;
544 if (bchannel->b_state == BSTATE_ACTIVE && bchannel->b_mode == 0)
545 ph_control(sock, on?DTMF_TONE_START:DTMF_TONE_STOP, 0, "DSP-DTMF", 1, bchannel->b_mode);
552 void bchannel_blowfish(struct bchannel *bchannel, unsigned char *key, int len)
556 sock = bchannel->b_sock;
557 memcpy(bchannel->b_bf_key, key, len);
558 bchannel->b_bf_len = len;
559 if (bchannel->b_state == BSTATE_ACTIVE)
560 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);
567 void bchannel_pipeline(struct bchannel *bchannel, char *pipeline)
571 sock = bchannel->b_sock;
572 strncpy(bchannel->b_pipeline, pipeline, sizeof(bchannel->b_pipeline)-1);
573 if (bchannel->b_state == BSTATE_ACTIVE)
574 ph_control_block(sock, DSP_PIPELINE_CFG, bchannel->b_pipeline, strlen(bchannel->b_pipeline)+1, "DSP-PIPELINE", 0, bchannel->b_mode);
581 void bchannel_gain(struct bchannel *bchannel, int gain, int tx)
585 sock = bchannel->b_sock;
587 bchannel->b_tx_gain = gain;
589 bchannel->b_rx_gain = gain;
590 if (bchannel->b_state == BSTATE_ACTIVE && bchannel->b_mode == 0)
591 ph_control(sock, (tx)?DSP_VOL_CHANGE_TX:DSP_VOL_CHANGE_RX, gain, (tx)?"DSP-TX_GAIN":"DSP-RX_GAIN", gain, bchannel->b_mode);
596 * main loop for processing messages from mISDN
598 static int bchannel_handle(struct lcr_fd *fd, unsigned int what, void *instance, int index)
600 struct bchannel *bchannel = (struct bchannel *)instance;
602 unsigned char buffer[2048+MISDN_HEADER_LEN];
603 struct mISDNhead *hh = (struct mISDNhead *)buffer;
605 ret = recv(bchannel->b_sock, buffer, sizeof(buffer), 0);
606 if (ret >= (int)MISDN_HEADER_LEN) {
608 /* after a confim, we can send more from queue */
610 if (bchannel->nodsp_queue) {
611 bchannel->queue_sent = 0;
612 bchannel_send_queue(bchannel);
616 /* we receive audio data, we respond to it AND we send tones */
621 bchannel_receive(bchannel, buffer, ret-MISDN_HEADER_LEN);
624 case PH_ACTIVATE_IND:
625 case DL_ESTABLISH_IND:
626 case PH_ACTIVATE_CNF:
627 case DL_ESTABLISH_CNF:
628 CDEBUG(bchannel->call, NULL, "DL_ESTABLISH confirm: bchannel is now activated (socket %d).\n", bchannel->b_sock);
629 bchannel_activated(bchannel);
632 case PH_DEACTIVATE_IND:
634 case PH_DEACTIVATE_CNF:
636 CDEBUG(bchannel->call, NULL, "DL_RELEASE confirm: bchannel is now de-activated (socket %d).\n", bchannel->b_sock);
637 // bchannel_deactivated(bchannel);
641 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);
644 // if (ret < 0 && errno != EWOULDBLOCK)
645 CERROR(bchannel->call, NULL, "Read from socket %d failed with return code %d\n", bchannel->b_sock, ret);
648 /* if we received at least one b-frame, we will return 1 */
654 * bchannel channel handling
656 struct bchannel *bchannel_first = NULL;
657 struct bchannel *find_bchannel_handle(unsigned int handle)
659 struct bchannel *bchannel = bchannel_first;
662 if (bchannel->handle == handle)
664 bchannel = bchannel->next;
670 struct bchannel *find_bchannel_ref(unsigned int ref)
672 struct bchannel *bchannel = bchannel_first;
675 if (bchannel->ref == ref)
677 bchannel = bchannel->next;
683 struct bchannel *alloc_bchannel(unsigned int handle)
685 struct bchannel **bchannelp = &bchannel_first;
688 bchannelp = &((*bchannelp)->next);
690 *bchannelp = (struct bchannel *)calloc(1, sizeof(struct bchannel));
693 (*bchannelp)->handle = handle;
694 (*bchannelp)->b_state = BSTATE_IDLE;
695 (*bchannelp)->b_sock = -1;
700 void free_bchannel(struct bchannel *bchannel)
702 struct bchannel **temp = &bchannel_first;
705 if (*temp == bchannel) {
706 *temp = (*temp)->next;
707 if (bchannel->b_sock > -1)
708 bchannel_destroy(bchannel);
709 if (bchannel->call) {
710 if (bchannel->call->bchannel)
711 bchannel->call->bchannel = NULL;
716 temp = &((*temp)->next);