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"
59 #ifndef ISDN_PID_L4_B_USER
60 #define ISDN_PID_L4_B_USER 0x440000ff
73 int bchannel_initialize(void)
80 void bchannel_deinitialize(void)
85 * send control information to the channel (dsp-module)
87 static void ph_control(int sock, unsigned int c1, unsigned int c2, char *trace_name, int trace_value, int b_mode)
89 unsigned char buffer[MISDN_HEADER_LEN+sizeof(int)+sizeof(int)];
90 struct mISDNhead *ctrl = (struct mISDNhead *)buffer;
91 unsigned int *d = (unsigned int *)(buffer+MISDN_HEADER_LEN);
94 if (b_mode != 0 && b_mode != 2)
97 CDEBUG(NULL, NULL, "Sending PH_CONTROL %s %x,%x\n", trace_name, c1, c2);
98 ctrl->prim = PH_CONTROL_REQ;
102 ret = sendto(sock, buffer, MISDN_HEADER_LEN+sizeof(int)*2, 0, NULL, 0);
104 CERROR(NULL, NULL, "Failed to send to socket %d\n", sock);
107 static void ph_control_block(int sock, unsigned int c1, void *c2, int c2_len, char *trace_name, int trace_value, int b_mode)
109 unsigned char buffer[MISDN_HEADER_LEN+sizeof(int)+c2_len];
110 struct mISDNhead *ctrl = (struct mISDNhead *)buffer;
111 unsigned int *d = (unsigned int *)(buffer+MISDN_HEADER_LEN);
114 if (b_mode != 0 && b_mode != 2)
117 CDEBUG(NULL, NULL, "Sending PH_CONTROL (block) %s %x\n", trace_name, c1);
118 ctrl->prim = PH_CONTROL_REQ;
121 memcpy(d, c2, c2_len);
122 ret = sendto(sock, buffer, MISDN_HEADER_LEN+sizeof(int)+c2_len, 0, NULL, 0);
124 CERROR(NULL, NULL, "Failed to send to socket %d\n", sock);
127 static int bchannel_handle(struct lcr_fd *fd, unsigned int what, void *instance, int index);
132 int bchannel_create(struct bchannel *bchannel, int mode)
135 struct sockaddr_mISDN addr;
137 if (bchannel->b_sock > -1) {
138 CERROR(bchannel->call, NULL, "Socket already created for handle 0x%x\n", bchannel->handle);
143 bchannel->b_mode = mode;
144 switch(bchannel->b_mode) {
146 CDEBUG(bchannel->call, NULL, "Open DSP audio\n");
147 bchannel->b_sock = socket(PF_ISDN, SOCK_DGRAM, ISDN_P_B_L2DSP);
150 CDEBUG(bchannel->call, NULL, "Open audio\n");
151 bchannel->b_sock = socket(PF_ISDN, SOCK_DGRAM, ISDN_P_B_RAW);
154 CDEBUG(bchannel->call, NULL, "Open DSP HDLC\n");
155 bchannel->b_sock = socket(PF_ISDN, SOCK_DGRAM, ISDN_P_B_L2DSPHDLC);
158 CDEBUG(bchannel->call, NULL, "Open HDLC\n");
159 bchannel->b_sock = socket(PF_ISDN, SOCK_DGRAM, ISDN_P_B_HDLC);
162 if (bchannel->b_sock < 0) {
163 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);
168 memset(&bchannel->lcr_fd, 0, sizeof(bchannel->lcr_fd));
169 bchannel->lcr_fd.fd = bchannel->b_sock;
170 register_fd(&bchannel->lcr_fd, LCR_FD_READ | LCR_FD_EXCEPT, bchannel_handle, bchannel, 0);
172 /* bind socket to bchannel */
173 addr.family = AF_ISDN;
174 addr.dev = (bchannel->handle>>8);
175 addr.channel = bchannel->handle & 0xff;
176 ret = bind(bchannel->b_sock, (struct sockaddr *)&addr, sizeof(addr));
178 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);
179 unregister_fd(&bchannel->lcr_fd);
180 close(bchannel->b_sock);
181 bchannel->b_sock = -1;
189 * activate / deactivate request
191 void bchannel_activate(struct bchannel *bchannel, int activate)
193 struct mISDNhead act;
196 /* activate bchannel */
197 CDEBUG(bchannel->call, NULL, "%sActivating B-channel.\n", activate?"":"De-");
198 switch(bchannel->b_mode) {
201 act.prim = (activate)?DL_ESTABLISH_REQ:DL_RELEASE_REQ;
205 act.prim = (activate)?PH_ACTIVATE_REQ:PH_DEACTIVATE_REQ;
209 ret = sendto(bchannel->b_sock, &act, MISDN_HEADER_LEN, 0, NULL, 0);
211 CERROR(bchannel->call, NULL, "Failed to send to socket %d\n", bchannel->b_sock);
213 bchannel->b_state = (activate)?BSTATE_ACTIVATING:BSTATE_DEACTIVATING;
220 static void bchannel_activated(struct bchannel *bchannel)
224 sock = bchannel->b_sock;
226 /* set dsp features */
227 if (bchannel->b_txdata)
228 ph_control(sock, (bchannel->b_txdata)?DSP_TXDATA_ON:DSP_TXDATA_OFF, 0, "DSP-TXDATA", bchannel->b_txdata, bchannel->b_mode);
229 if (bchannel->b_delay && bchannel->b_mode == 0)
230 ph_control(sock, DSP_DELAY, bchannel->b_delay, "DSP-DELAY", bchannel->b_delay, bchannel->b_mode);
231 if (bchannel->b_tx_dejitter && bchannel->b_mode == 0)
232 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);
233 if (bchannel->b_tx_gain && bchannel->b_mode == 0)
234 ph_control(sock, DSP_VOL_CHANGE_TX, bchannel->b_tx_gain, "DSP-TX_GAIN", bchannel->b_tx_gain, bchannel->b_mode);
235 if (bchannel->b_rx_gain && bchannel->b_mode == 0)
236 ph_control(sock, DSP_VOL_CHANGE_RX, bchannel->b_rx_gain, "DSP-RX_GAIN", bchannel->b_rx_gain, bchannel->b_mode);
237 if (bchannel->b_pipeline[0] && bchannel->b_mode == 0)
238 ph_control_block(sock, DSP_PIPELINE_CFG, bchannel->b_pipeline, strlen(bchannel->b_pipeline)+1, "DSP-PIPELINE", 0, bchannel->b_mode);
239 if (bchannel->b_conf)
240 ph_control(sock, DSP_CONF_JOIN, bchannel->b_conf, "DSP-CONF", bchannel->b_conf, bchannel->b_mode);
241 if (bchannel->b_echo)
242 ph_control(sock, DSP_ECHO_ON, 0, "DSP-ECHO", 1, bchannel->b_mode);
243 if (bchannel->b_tone && bchannel->b_mode == 0)
244 ph_control(sock, DSP_TONE_PATT_ON, bchannel->b_tone, "DSP-TONE", bchannel->b_tone, bchannel->b_mode);
245 if (bchannel->b_rxoff)
246 ph_control(sock, DSP_RECEIVE_OFF, 0, "DSP-RXOFF", 1, bchannel->b_mode);
247 // if (bchannel->b_txmix && bchannel->b_mode == 0)
248 // ph_control(sock, DSP_MIX_ON, 0, "DSP-MIX", 1, bchannel->b_mode);
249 if (bchannel->b_dtmf && bchannel->b_mode == 0)
250 ph_control(sock, DTMF_TONE_START, 0, "DSP-DTMF", 1, bchannel->b_mode);
251 if (bchannel->b_bf_len && bchannel->b_mode == 0)
252 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);
253 if (bchannel->b_conf)
254 ph_control(sock, DSP_CONF_JOIN, bchannel->b_conf, "DSP-CONF", bchannel->b_conf, bchannel->b_mode);
256 bchannel->b_state = BSTATE_ACTIVE;
262 void bchannel_destroy(struct bchannel *bchannel)
264 if (bchannel->b_sock > -1) {
265 unregister_fd(&bchannel->lcr_fd);
266 close(bchannel->b_sock);
267 bchannel->b_sock = -1;
269 bchannel->b_state = BSTATE_IDLE;
274 * whenever we get audio data from bchannel, we process it here
276 static void bchannel_receive(struct bchannel *bchannel, unsigned char *buffer, int len)
278 struct mISDNhead *hh = (struct mISDNhead *)buffer;
279 unsigned char *data = buffer + MISDN_HEADER_LEN;
280 unsigned int cont = *((unsigned int *)data);
283 struct bchannel *remote_bchannel;
286 if (hh->prim == PH_CONTROL_IND) {
287 /* non dsp -> ignore ph_control */
288 if (bchannel->b_mode == 1 || bchannel->b_mode == 3)
291 CERROR(bchannel->call, NULL, "SHORT READ OF PH_CONTROL INDICATION\n");
294 if ((cont&(~DTMF_TONE_MASK)) == DTMF_TONE_VAL) {
296 lcr_in_dtmf(bchannel->call, cont & DTMF_TONE_MASK);
301 CERROR(bchannel->call, NULL, "Blowfish crypt rejected.\n");
305 CDEBUG(bchannel->call, NULL, "Blowfish crypt enabled.\n");
309 CDEBUG(bchannel->call, NULL, "Unhandled bchannel control 0x%x.\n", cont);
313 if (hh->prim == PH_DATA_REQ) {
314 if (!bchannel->b_txdata) {
315 /* if tx is off, it may happen that fifos send us pending informations, we just ignore them */
316 CDEBUG(bchannel->call, NULL, "ignoring tx data, because 'txdata' is turned off\n");
321 if (hh->prim != PH_DATA_IND && hh->prim != DL_DATA_IND) {
322 CERROR(bchannel->call, NULL, "Bchannel received unknown primitve: 0x%lx\n", hh->prim);
325 /* if calls are bridged, but not via dsp (no b_conf), forward here */
326 if (!bchannel->b_conf
328 && bchannel->call->bridge_call
329 && bchannel->call->bridge_call->bchannel) {
330 remote_bchannel = bchannel->call->bridge_call->bchannel;
333 char string[4096] = "";
335 sprintf(string+strlen(string), " %02x", data[i]);
338 CDEBUG(remote_bchannel->call, NULL, "Forwarding packet%s\n", string);
340 hh->prim = PH_DATA_REQ;
342 ret = sendto(remote_bchannel->b_sock, buffer, MISDN_HEADER_LEN+len, 0, NULL, 0);
344 CERROR(remote_bchannel->call, NULL, "Failed to send to socket %d\n", bchannel->b_sock);
347 /* calls will not process any audio data unless
348 * the call is connected OR interface features audio during call setup.
351 /* if rx is off, it may happen that fifos send us pending informations, we just ignore them */
352 if (bchannel->b_rxoff) {
353 CDEBUG(bchannel->call, NULL, "ignoring data, because rx is turned off\n");
357 if (!bchannel->call) {
358 CDEBUG(bchannel->call, NULL, "ignoring data, because no call associated with bchannel\n");
361 if (!bchannel->call->audiopath) {
362 /* return, because we have no audio from port */
366 if (bchannel->call->pipe[1] < 0) {
372 if (bchannel->b_mode == 0 || bchannel->b_mode == 1) {
374 for (i = 0; i < len; i++) {
381 len = write(bchannel->call->pipe[1], data, len);
387 close(bchannel->call->pipe[1]);
388 bchannel->call->pipe[1] = -1;
389 CDEBUG(bchannel->call, NULL, "broken pipe on bchannel pipe\n");
394 * transmit data to bchannel
396 void bchannel_transmit(struct bchannel *bchannel, unsigned char *data, int len)
398 unsigned char buff[1024 + MISDN_HEADER_LEN], *p = buff + MISDN_HEADER_LEN;
399 struct mISDNhead *frm = (struct mISDNhead *)buff;
403 if (bchannel->b_state != BSTATE_ACTIVE)
405 if (len > 1024 || len < 1)
407 switch(bchannel->b_mode) {
409 for (i = 0; i < len; i++)
410 *p++ = flip_bits[*data++];
411 frm->prim = DL_DATA_REQ;
414 for (i = 0; i < len; i++)
415 *p++ = flip_bits[*data++];
416 frm->prim = PH_DATA_REQ;
419 memcpy(p, data, len);
420 frm->prim = DL_DATA_REQ;
423 memcpy(p, data, len);
424 frm->prim = PH_DATA_REQ;
428 ret = sendto(bchannel->b_sock, buff, MISDN_HEADER_LEN+len, 0, NULL, 0);
430 CERROR(bchannel->call, NULL, "Failed to send to socket %d\n", bchannel->b_sock);
437 void bchannel_join(struct bchannel *bchannel, unsigned short id)
441 sock = bchannel->b_sock;
443 bchannel->b_conf = (id<<16) + bchannel_pid;
444 bchannel->b_rxoff = 1;
446 bchannel->b_conf = 0;
447 bchannel->b_rxoff = 0;
449 if (bchannel->b_state == BSTATE_ACTIVE) {
450 ph_control(sock, DSP_RECEIVE_OFF, bchannel->b_rxoff, "DSP-RX_OFF", bchannel->b_conf, bchannel->b_mode);
451 ph_control(sock, DSP_CONF_JOIN, bchannel->b_conf, "DSP-CONF", bchannel->b_conf, bchannel->b_mode);
459 void bchannel_dtmf(struct bchannel *bchannel, int on)
463 sock = bchannel->b_sock;
464 bchannel->b_dtmf = on;
465 if (bchannel->b_state == BSTATE_ACTIVE && bchannel->b_mode == 0)
466 ph_control(sock, on?DTMF_TONE_START:DTMF_TONE_STOP, 0, "DSP-DTMF", 1, bchannel->b_mode);
473 void bchannel_blowfish(struct bchannel *bchannel, unsigned char *key, int len)
477 sock = bchannel->b_sock;
478 memcpy(bchannel->b_bf_key, key, len);
479 bchannel->b_bf_len = len;
480 if (bchannel->b_state == BSTATE_ACTIVE)
481 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);
488 void bchannel_pipeline(struct bchannel *bchannel, char *pipeline)
492 sock = bchannel->b_sock;
493 strncpy(bchannel->b_pipeline, pipeline, sizeof(bchannel->b_pipeline)-1);
494 if (bchannel->b_state == BSTATE_ACTIVE)
495 ph_control_block(sock, DSP_PIPELINE_CFG, bchannel->b_pipeline, strlen(bchannel->b_pipeline)+1, "DSP-PIPELINE", 0, bchannel->b_mode);
502 void bchannel_gain(struct bchannel *bchannel, int gain, int tx)
506 sock = bchannel->b_sock;
508 bchannel->b_tx_gain = gain;
510 bchannel->b_rx_gain = gain;
511 if (bchannel->b_state == BSTATE_ACTIVE && bchannel->b_mode == 0)
512 ph_control(sock, (tx)?DSP_VOL_CHANGE_TX:DSP_VOL_CHANGE_RX, gain, (tx)?"DSP-TX_GAIN":"DSP-RX_GAIN", gain, bchannel->b_mode);
517 * main loop for processing messages from mISDN
519 static int bchannel_handle(struct lcr_fd *fd, unsigned int what, void *instance, int index)
521 struct bchannel *bchannel = (struct bchannel *)instance;
523 unsigned char buffer[2048+MISDN_HEADER_LEN];
524 struct mISDNhead *hh = (struct mISDNhead *)buffer;
526 ret = recv(bchannel->b_sock, buffer, sizeof(buffer), 0);
527 if (ret >= (int)MISDN_HEADER_LEN) {
529 /* we don't care about confirms, we use rx data to sync tx */
533 /* we receive audio data, we respond to it AND we send tones */
538 bchannel_receive(bchannel, buffer, ret-MISDN_HEADER_LEN);
541 case PH_ACTIVATE_IND:
542 case DL_ESTABLISH_IND:
543 case PH_ACTIVATE_CNF:
544 case DL_ESTABLISH_CNF:
545 CDEBUG(bchannel->call, NULL, "DL_ESTABLISH confirm: bchannel is now activated (socket %d).\n", bchannel->b_sock);
546 bchannel_activated(bchannel);
549 case PH_DEACTIVATE_IND:
551 case PH_DEACTIVATE_CNF:
553 CDEBUG(bchannel->call, NULL, "DL_RELEASE confirm: bchannel is now de-activated (socket %d).\n", bchannel->b_sock);
554 // bchannel_deactivated(bchannel);
558 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);
561 // if (ret < 0 && errno != EWOULDBLOCK)
562 CERROR(bchannel->call, NULL, "Read from socket %d failed with return code %d\n", bchannel->b_sock, ret);
565 /* if we received at least one b-frame, we will return 1 */
571 * bchannel channel handling
573 struct bchannel *bchannel_first = NULL;
574 struct bchannel *find_bchannel_handle(unsigned int handle)
576 struct bchannel *bchannel = bchannel_first;
579 if (bchannel->handle == handle)
581 bchannel = bchannel->next;
587 struct bchannel *find_bchannel_ref(unsigned int ref)
589 struct bchannel *bchannel = bchannel_first;
592 if (bchannel->ref == ref)
594 bchannel = bchannel->next;
600 struct bchannel *alloc_bchannel(unsigned int handle)
602 struct bchannel **bchannelp = &bchannel_first;
605 bchannelp = &((*bchannelp)->next);
607 *bchannelp = (struct bchannel *)calloc(1, sizeof(struct bchannel));
610 (*bchannelp)->handle = handle;
611 (*bchannelp)->b_state = BSTATE_IDLE;
612 (*bchannelp)->b_sock = -1;
617 void free_bchannel(struct bchannel *bchannel)
619 struct bchannel **temp = &bchannel_first;
622 if (*temp == bchannel) {
623 *temp = (*temp)->next;
624 if (bchannel->b_sock > -1)
625 bchannel_destroy(bchannel);
626 if (bchannel->call) {
627 if (bchannel->call->bchannel)
628 bchannel->call->bchannel = NULL;
633 temp = &((*temp)->next);