bchannel.c

   1 /*****************************************************************************\
   2 **                                                                           **
   3 ** Linux Call Router                                                         **
   4 **                                                                           **
   5 **---------------------------------------------------------------------------**
   6 ** Copyright: Andreas Eversberg                                              **
   7 **                                                                           **
   8 ** mISDN channel handlin for remote application                              **
   9 **                                                                           **
  10 \*****************************************************************************/
  11
  12
  13
  14
  15 #include <stdio.h>
  16 #include <stdlib.h>
  17 #include <unistd.h>
  18 #include <string.h>
  19 #include <poll.h>
  20 #include <errno.h>
  21 #include <sys/ioctl.h>
  22 #include <sys/types.h>
  23 #include <sys/stat.h>
  24 #include <fcntl.h>
  25 #ifdef SOCKET_MISDN
  26 #include <netinet/udp.h>
  27 #include <netinet/in.h>
  28 #include <netdb.h>
  29 #include <sys/socket.h>
  30 #include <pthread.h>
  31 #else
  32 #include "mISDNlib.h"
  33 #include <linux/mISDNif.h>
  34 #endif
  35 #include "bchannel.h"
  36
  37 #ifndef ISDN_PID_L4_B_USER
  38 #define ISDN_PID_L4_B_USER 0x440000ff
  39 #endif
  40
  41 #define PERROR(arg...) fprintf(stderr, ##arg)
  42 #define PDEBUG(arg...) while(0)
  43
  44 pid_t   bchannel_pid;
  45
  46 enum {
  47         BSTATE_IDLE,
  48         BSTATE_ACTIVATING,
  49         BSTATE_ACTIVE,
  50 };
  51
  52 #ifdef SOCKET_MISDN
  53
  54 int bchannel_initialize(void)
  55 {
  56         return(0);
  57 }
  58
  59 void bchannel_deinitialize(void)
  60 {
  61 }
  62 #else
  63 int bchannel_entity = 0; /* used for udevice */
  64 int bchannel_device = -1; /* the device handler and port list */
  65
  66 int bchannel_initialize(void)
  67 {
  68         char debug_log[128];
  69         unsigned char buff[1025];
  70         iframe_t *frm = (iframe_t *)buff;
  71         int ret;
  72
  73         /* open mISDNdevice if not already open */
  74         if (bchannel_device < 0)
  75         {
  76                 ret = mISDN_open();
  77                 if (ret < 0)
  78                 {
  79                         PERROR("cannot open mISDN device ret=%d errno=%d (%s) Check for mISDN modules!\nAlso did you create \"/dev/mISDN\"? Do: \"mknod /dev/mISDN c 46 0\"\n", ret, errno, strerror(errno));
  80                         return(-1);
  81                 }
  82                 bchannel_device = ret;
  83                 PDEBUG("mISDN device opened.\n");
  84
  85                 /* create entity for layer 3 TE-mode */
  86                 mISDN_write_frame(bchannel_device, buff, 0, MGR_NEWENTITY | REQUEST, 0, 0, NULL, TIMEOUT_1SEC);
  87                 ret = mISDN_read_frame(bchannel_device, frm, sizeof(iframe_t), 0, MGR_NEWENTITY | CONFIRM, TIMEOUT_1SEC);
  88                 if (ret < (int)mISDN_HEADER_LEN)
  89                 {
  90                         noentity:
  91                         PERROR("Cannot request MGR_NEWENTITY from mISDN. Exitting due to software bug.");
  92                         return(-1);
  93                 }
  94                 bchannel_entity = frm->dinfo & 0xffff;
  95                 if (!bchannel_entity)
  96                         goto noentity;
  97         }
  98         return(0);
  99 }
 100
 101 void bchannel_deinitialize(void)
 102 {
 103         unsigned char buff[1025];
 104
 105         if (bchannel_device >= 0)
 106         {
 107                 /* free entity */
 108                 mISDN_write_frame(bchannel_device, buff, 0, MGR_DELENTITY | REQUEST, bchannel_entity, 0, NULL, TIMEOUT_1SEC);
 109                 /* close device */
 110                 mISDN_close(bchannel_device);
 111                 bchannel_device = -1;
 112         }
 113 }
 114 #endif
 115
 116 /*
 117  * send control information to the channel (dsp-module)
 118  */
 119 static void ph_control(unsigned long handle, unsigned long c1, unsigned long c2, char *trace_name, int trace_value)
 120 {
 121 #ifdef SOCKET_MISDN
 122         unsigned char buffer[MISDN_HEADER_LEN+sizeof(int)+sizeof(int)];
 123         struct mISDNhead *ctrl = (struct mISDNhead *)buffer;
 124         unsigned long *d = buffer+MISDN_HEADER_LEN;
 125         int ret;
 126
 127         ctrl->prim = PH_CONTROL_REQ;
 128         ctrl->id = 0;
 129         *d++ = c1;
 130         *d++ = c2;
 131         ret = sendto(handle, buffer, MISDN_HEADER_LEN+sizeof(int)*2, 0, NULL, 0);
 132         if (!ret)
 133                 PERROR("Failed to send to socket %d\n", handle);
 134 #else
 135         unsigned char buffer[mISDN_HEADER_LEN+sizeof(int)+sizeof(int)];
 136         iframe_t *ctrl = (iframe_t *)buffer;
 137         unsigned long *d = (unsigned long *)&ctrl->data.p;
 138
 139         ctrl->prim = PH_CONTROL | REQUEST;
 140         ctrl->addr = handle | FLG_MSG_DOWN;
 141         ctrl->dinfo = 0;
 142         ctrl->len = sizeof(int)*2;
 143         *d++ = c1;
 144         *d++ = c2;
 145         mISDN_write(bchannel_device, ctrl, mISDN_HEADER_LEN+ctrl->len, TIMEOUT_1SEC);
 146 #endif
 147 #if 0
 148         chan_trace_header(mISDNport, isdnport, "BCHANNEL control", DIRECTION_OUT);
 149         if (c1 == CMX_CONF_JOIN)
 150                 add_trace(trace_name, NULL, "0x%08x", trace_value);
 151         else
 152                 add_trace(trace_name, NULL, "%d", trace_value);
 153         end_trace();
 154 #endif
 155 }
 156
 157 static void ph_control_block(unsigned long handle, unsigned long c1, void *c2, int c2_len, char *trace_name, int trace_value)
 158 {
 159 #ifdef SOCKET_MISDN
 160         unsigned char buffer[MISDN_HEADER_LEN+sizeof(int)+c2_len];
 161         struct mISDNhead *ctrl = (struct mISDNhead *)buffer;
 162         unsigned long *d = buffer+MISDN_HEADER_LEN;
 163         int ret;
 164
 165         ctrl->prim = PH_CONTROL_REQ;
 166         ctrl->id = 0;
 167         *d++ = c1;
 168         memcpy(d, c2, c2_len);
 169         ret = sendto(handle, buffer, MISDN_HEADER_LEN+sizeof(int)+c2_len, 0, NULL, 0);
 170         if (!ret)
 171                 PERROR("Failed to send to socket %d\n", handle);
 172 #else
 173         unsigned char buffer[mISDN_HEADER_LEN+sizeof(int)+c2_len];
 174         iframe_t *ctrl = (iframe_t *)buffer;
 175         unsigned long *d = (unsigned long *)&ctrl->data.p;
 176
 177         ctrl->prim = PH_CONTROL | REQUEST;
 178         ctrl->addr = handle | FLG_MSG_DOWN;
 179         ctrl->dinfo = 0;
 180         ctrl->len = sizeof(int)+c2_len;
 181         *d++ = c1;
 182         memcpy(d, c2, c2_len);
 183         mISDN_write(bchannel_device, ctrl, mISDN_HEADER_LEN+ctrl->len, TIMEOUT_1SEC);
 184 #endif
 185 #if 0
 186         chan_trace_header(mISDNport, isdnport, "BCHANNEL control", DIRECTION_OUT);
 187         add_trace(trace_name, NULL, "%d", trace_value);
 188         end_trace();
 189 #endif
 190 }
 191
 192
 193 /*
 194  * create stack
 195  */
 196 int bchannel_create(struct bchannel *channel)
 197 {
 198         unsigned char buff[1024];
 199         int ret;
 200 #ifdef SOCKET_MISDN
 201         unsigned long on = 1;
 202         struct sockadd_mISDN addr;
 203
 204         if (channel->b_sock)
 205         {
 206                 PERROR("Error: Socket already created for handle 0x%x\n", channel->handle);
 207                 return(0);
 208         }
 209
 210         /* open socket */
 211         channel->b_sock = socket(PF_ISDN, SOCK_DGRAM, ISDN_P_B_L2DSP);
 212         if (channel->b_sock < 0)
 213         {
 214                 PERROR("Error: Failed to open bchannel-socket for handle 0x%x with mISDN-DSP layer. Did you load mISDNdsp.ko?\n", channel->handle);
 215                 return(0);
 216         }
 217
 218         /* set nonblocking io */
 219         ret = ioctl(channel->b_sock, FIONBIO, &on);
 220         if (ret < 0)
 221         {
 222                 PERROR("Error: Failed to set bchannel-socket handle 0x%x into nonblocking IO\n", channel->handle);
 223                 close(channel->b_sock);
 224                 channel->b_sock = -1;
 225                 return(0);
 226         }
 227
 228         /* bind socket to bchannel */
 229         addr.family = AF_ISDN;
 230         addr.dev = (channel->handle>>8)-1;
 231         addr.channel = channel->handle && 0xff;
 232         ret = bind(channel->b_sock, (struct sockaddr *)&addr, sizeof(addr));
 233         if (ret < 0)
 234         {
 235                 PERROR("Error: Failed to bind bchannel-socket for handle 0x%x with mISDN-DSP layer. Did you load mISDNdsp.ko?\n", channel->handle);
 236                 close(channel->b_sock);
 237                 channel->b_sock = -1;
 238                 return(0);
 239         }
 240
 241 #if 0
 242         chan_trace_header(mISDNport, mISDNport->b_port[i], "BCHANNEL create socket", DIRECTION_OUT);
 243         add_trace("channel", NULL, "%d", i+1+(i>=15));
 244         add_trace("socket", NULL, "%d", mISDNport->b_socket[i]);
 245         end_trace();
 246 #endif
 247 #else
 248         layer_info_t li;
 249         mISDN_pid_t pid;
 250
 251         if (channel->b_stid)
 252         {
 253                 PERROR("Error: stack already created for address 0x%x\n", channel->b_stid);
 254                 return(0);
 255         }
 256
 257         if (channel->b_addr)
 258         {
 259                 PERROR("Error: stack already created for address 0x%x\n", channel->b_addr);
 260                 return(0);
 261         }
 262
 263         /* create new layer */
 264         PDEBUG("creating new layer for stid 0x%x.\n" , channel->handle);
 265         memset(&li, 0, sizeof(li));
 266         memset(&pid, 0, sizeof(pid));
 267         li.object_id = -1;
 268         li.extentions = 0;
 269         li.st = channel->handle;
 270         strcpy(li.name, "B L4");
 271         li.pid.layermask = ISDN_LAYER((4));
 272         li.pid.protocol[4] = ISDN_PID_L4_B_USER;
 273         ret = mISDN_new_layer(bchannel_device, &li);
 274         if (ret)
 275         {
 276                 failed_new_layer:
 277                 PERROR("mISDN_new_layer() failed to add bchannel for stid 0x%x.\n", channel->handle);
 278                 goto failed;
 279         }
 280         if (!li.id)
 281         {
 282                 goto failed_new_layer;
 283         }
 284         channel->b_stid = channel->handle;
 285         channel->b_addr = li.id;
 286         PDEBUG("new layer (b_addr=0x%x)\n", channel->b_addr);
 287
 288         /* create new stack */
 289         pid.protocol[1] = ISDN_PID_L1_B_64TRANS;
 290         pid.protocol[2] = ISDN_PID_L2_B_TRANS;
 291         pid.protocol[3] = ISDN_PID_L3_B_DSP;
 292         pid.protocol[4] = ISDN_PID_L4_B_USER;
 293         pid.layermask = ISDN_LAYER((1)) | ISDN_LAYER((2)) | ISDN_LAYER((3)) | ISDN_LAYER((4));
 294         ret = mISDN_set_stack(bchannel_device, channel->b_stid, &pid);
 295         if (ret)
 296         {
 297                 stack_error:
 298                 PERROR("mISDN_set_stack() failed (ret=%d) to add bchannel stid=0x%x\n", ret, channel->b_stid);
 299                 mISDN_write_frame(bchannel_device, buff, channel->b_addr, MGR_DELLAYER | REQUEST, 0, 0, NULL, TIMEOUT_1SEC);
 300                 goto failed;
 301         }
 302         ret = mISDN_get_setstack_ind(bchannel_device, channel->b_addr);
 303         if (ret)
 304                 goto stack_error;
 305
 306         /* get layer id */
 307         channel->b_addr = mISDN_get_layerid(bchannel_device, channel->b_stid, 4);
 308         if (!channel->b_addr)
 309                 goto stack_error;
 310 #if 0
 311         chan_trace_header(mISDNport, mISDNport->b_port[i], "BCHANNEL create stack", DIRECTION_OUT);
 312         add_trace("channel", NULL, "%d", i+1+(i>=15));
 313         add_trace("stack", "id", "0x%08x", mISDNport->b_stid[i]);
 314         add_trace("stack", "address", "0x%08x", mISDNport->b_addr[i]);
 315         end_trace();
 316 #endif
 317 #endif
 318
 319         return(1);
 320
 321 failed:
 322         channel->b_stid = 0;
 323         channel->b_addr = 0;
 324         return(0);
 325 }
 326
 327
 328 /*
 329  * activate / deactivate request
 330  */
 331 void bchannel_activate(struct bchannel *channel, int activate)
 332 {
 333 #ifdef SOCKET_MISDN
 334         struct mISDNhead act;
 335         int ret;
 336
 337         act.prim = (activate)?DL_ESTABLISH_REQ:DL_RELEASE_REQ;
 338         act.id = 0;
 339         ret = sendto(channel->b_sock, &act, MISDN_HEADER_LEN, 0, NULL, 0);
 340         if (!ret)
 341                 PERROR("Failed to send to socket %d\n", channel->b_sock);
 342 #else
 343         iframe_t act;
 344
 345         /* activate bchannel */
 346         act.prim = (activate?DL_ESTABLISH:DL_RELEASE) | REQUEST;
 347         act.addr = channel->b_addr | FLG_MSG_DOWN;
 348         act.dinfo = 0;
 349         act.len = 0;
 350         mISDN_write(bchannel_device, &act, mISDN_HEADER_LEN+act.len, TIMEOUT_1SEC);
 351 #endif
 352
 353         channel->b_state = BSTATE_ACTIVATING;
 354 #if 0
 355         /* trace */
 356         chan_trace_header(mISDNport, mISDNport->b_port[i], activate?(char*)"BCHANNEL activate":(char*)"BCHANNEL deactivate", DIRECTION_OUT);
 357         add_trace("channel", NULL, "%d", i+1+(i>=15));
 358         end_trace();
 359 #endif
 360 }
 361
 362
 363 /*
 364  * set features
 365  */
 366 static void bchannel_activated(struct bchannel *channel)
 367 {
 368 #ifdef SOCKET_MISDN
 369         int handle;
 370
 371         handle = channel->b_sock;
 372 #else
 373         unsigned long handle;
 374
 375         handle = channel->b_addr;
 376 #endif
 377
 378         /* set dsp features */
 379         if (channel->b_txdata)
 380                 ph_control(handle, (channel->b_txdata)?CMX_TXDATA_ON:CMX_TXDATA_OFF, 0, "DSP-TXDATA", channel->b_txdata);
 381         if (channel->b_delay)
 382                 ph_control(handle, CMX_DELAY, channel->b_delay, "DSP-DELAY", channel->b_delay);
 383         if (channel->b_tx_dejitter)
 384                 ph_control(handle, (channel->b_tx_dejitter)?CMX_TX_DEJITTER:CMX_TX_DEJ_OFF, 0, "DSP-DELAY", channel->b_tx_dejitter);
 385         if (channel->b_tx_gain)
 386                 ph_control(handle, VOL_CHANGE_TX, channel->b_tx_gain, "DSP-TX_GAIN", channel->b_tx_gain);
 387         if (channel->b_rx_gain)
 388                 ph_control(handle, VOL_CHANGE_RX, channel->b_rx_gain, "DSP-RX_GAIN", channel->b_rx_gain);
 389         if (channel->b_pipeline[0])
 390                 ph_control_block(handle, PIPELINE_CFG, channel->b_pipeline, strlen(channel->b_pipeline)+1, "DSP-PIPELINE", 0);
 391         if (channel->b_conf)
 392                 ph_control(handle, CMX_CONF_JOIN, channel->b_conf, "DSP-CONF", channel->b_conf);
 393         if (channel->b_echo)
 394                 ph_control(handle, CMX_ECHO_ON, 0, "DSP-ECHO", 1);
 395         if (channel->b_tone)
 396                 ph_control(handle, TONE_PATT_ON, channel->b_tone, "DSP-TONE", channel->b_tone);
 397         if (channel->b_rxoff)
 398                 ph_control(handle, CMX_RECEIVE_OFF, 0, "DSP-RXOFF", 1);
 399 //      if (channel->b_txmix)
 400 //              ph_control(handle, CMX_MIX_ON, 0, "DSP-MIX", 1);
 401         if (channel->b_dtmf)
 402                 ph_control(handle, DTMF_TONE_START, 0, "DSP-DTMF", 1);
 403         if (channel->b_crypt_len)
 404                 ph_control_block(handle, BF_ENABLE_KEY, channel->b_crypt_key, channel->b_crypt_len, "DSP-CRYPT", channel->b_crypt_len);
 405         if (channel->b_conf)
 406                 ph_control(handle, CMX_CONF_JOIN, channel->b_conf, "DSP-CONF", channel->b_conf);
 407
 408         channel->b_state = BSTATE_ACTIVE;
 409 }
 410
 411 /*
 412  * destroy stack
 413  */
 414 static void bchannel_destroy(struct bchannel *channel)
 415 {
 416 #ifdef SOCKET_MISDN
 417 #if 0
 418         chan_trace_header(mISDNport, mISDNport->b_port[i], "BCHANNEL remove socket", DIRECTION_OUT);
 419         add_trace("channel", NULL, "%d", i+1+(i>=15));
 420         add_trace("socket", NULL, "%d", mISDNport->b_socket[i]);
 421         end_trace();
 422 #endif
 423         if (channel->b_sock > -1)
 424         {
 425                 close(channel->b_sock);
 426                 channel->b_sock = -1;
 427         }
 428 #else
 429         unsigned char buff[1024];
 430
 431 #if 0
 432         chan_trace_header(mISDNport, mISDNport->b_port[i], "BCHANNEL remove stack", DIRECTION_OUT);
 433         add_trace("channel", NULL, "%d", i+1+(i>=15));
 434         add_trace("stack", "id", "0x%08x", mISDNport->b_stid[i]);
 435         add_trace("stack", "address", "0x%08x", mISDNport->b_addr[i]);
 436         end_trace();
 437 #endif
 438         /* remove our stack only if set */
 439         if (channel->b_addr)
 440         {
 441                 PDEBUG("free stack (b_addr=0x%x)\n", channel->b_addr);
 442                 mISDN_clear_stack(bchannel_device, channel->b_stid);
 443                 mISDN_write_frame(bchannel_device, buff, channel->b_addr | FLG_MSG_DOWN, MGR_DELLAYER | REQUEST, 0, 0, NULL, TIMEOUT_1SEC);
 444                 channel->b_stid = 0;
 445                 channel->b_addr = 0;
 446         }
 447 #endif
 448         channel->b_state = BSTATE_IDLE;
 449 }
 450
 451
 452 /*
 453  * whenever we get audio data from bchannel, we process it here
 454  */
 455 static void bchannel_receive(struct bchannel *channel, unsigned long prim, unsigned long dinfo, unsigned char *data, int len)
 456 {
 457         unsigned long cont = *((unsigned long *)data);
 458         unsigned char *data_temp;
 459         unsigned long length_temp;
 460         unsigned char *p;
 461         int l;
 462
 463         if (prim == (PH_CONTROL | INDICATION))
 464         {
 465                 if (len < 4)
 466                 {
 467                         PERROR("SHORT READ OF PH_CONTROL INDICATION\n");
 468                         return;
 469                 }
 470                 if ((cont&(~DTMF_TONE_MASK)) == DTMF_TONE_VAL)
 471                 {
 472 #if 0
 473                         chan_trace_header(p_m_mISDNport, this, "BCHANNEL control", DIRECTION_IN);
 474                         add_trace("DTMF", NULL, "%c", cont & DTMF_TONE_MASK);
 475                         end_trace();
 476 #endif
 477                         if (channel->rx_dtmf)
 478                                 channel->rx_dtmf(channel, cont & DTMF_TONE_MASK);
 479                         return;
 480                 }
 481                 switch(cont)
 482                 {
 483                         case BF_REJECT:
 484 #if 0
 485                         chan_trace_header(p_m_mISDNport, this, "BCHANNEL control", DIRECTION_IN);
 486                         add_trace("DSP-CRYPT", NULL, "error");
 487                         end_trace();
 488 #endif
 489                         break;
 490
 491                         case BF_ACCEPT:
 492 #if 0
 493                         chan_trace_header(p_m_mISDNport, this, "BCHANNEL control", DIRECTION_IN);
 494                         add_trace("DSP-CRYPT", NULL, "ok");
 495                         end_trace();
 496 #endif
 497                         break;
 498
 499                         default:
 500 #if 0
 501                         chan_trace_header(p_m_mISDNport, this, "BCHANNEL control", DIRECTION_IN);
 502                         add_trace("unknown", NULL, "0x%x", cont);
 503                         end_trace();
 504 #else
 505                         ;
 506 #endif
 507                 }
 508                 return;
 509         }
 510         if (prim == (PH_SIGNAL | INDICATION))
 511         {
 512                 switch(dinfo)
 513                 {
 514                         case CMX_TX_DATA:
 515                         if (!channel->b_txdata)
 516                         {
 517                                 /* if tx is off, it may happen that fifos send us pending informations, we just ignore them */
 518                                 PDEBUG("PmISDN(%s) ignoring tx data, because 'txdata' is turned off\n", p_name);
 519                                 return;
 520                         }
 521                         break;
 522
 523                         default:
 524 #if 0
 525                         chan_trace_header(p_m_mISDNport, this, "BCHANNEL signal", DIRECTION_IN);
 526                         add_trace("unknown", NULL, "0x%x", frm->dinfo);
 527                         end_trace();
 528 #else
 529                         ;
 530 #endif
 531                 }
 532                 return;
 533         }
 534         if (prim != PH_DATA_IND && prim != DL_DATA_IND)
 535         {
 536                 PERROR("Bchannel received unknown primitve: 0x%x\n", prim);
 537                 return;
 538         }
 539         /* calls will not process any audio data unless
 540          * the call is connected OR interface features audio during call setup.
 541          */
 542
 543         /* if rx is off, it may happen that fifos send us pending informations, we just ignore them */
 544         if (channel->b_rxoff)
 545         {
 546                 PDEBUG("PmISDN(%s) ignoring data, because rx is turned off\n", p_name);
 547                 return;
 548         }
 549
 550         if (channel->rx_data)
 551                 channel->rx_data(channel, data, len);
 552 }
 553
 554
 555 /*
 556  * transmit data to bchannel
 557  */
 558 void bchannel_transmit(struct bchannel *channel, unsigned char *data, int len)
 559 {
 560         unsigned char buff[1025];
 561         iframe_t *frm = (iframe_t *)buff;
 562
 563         if (channel->b_state != BSTATE_ACTIVE)
 564                 return;
 565 #ifdef SOCKET_MISDN
 566         frm->prim = DL_DATA_REQ;
 567         frm->id = 0;
 568         ret = sendto(channel->b_sock, data, len, 0, NULL, 0);
 569         if (!ret)
 570                 PERROR("Failed to send to socket %d\n", channel->b_sock);
 571 #else
 572         frm->prim = DL_DATA | REQUEST;
 573         frm->addr = channel->b_addr | FLG_MSG_DOWN;
 574         frm->dinfo = 0;
 575         frm->len = len;
 576         if (frm->len)
 577                 mISDN_write(bchannel_device, frm, mISDN_HEADER_LEN+frm->len, TIMEOUT_1SEC);
 578 #endif
 579 }
 580
 581
 582 /*
 583  * join bchannel
 584  */
 585 void bchannel_join(struct bchannel *channel, unsigned short id)
 586 {
 587 #ifdef SOCKET_MISDN
 588         int handle;
 589
 590         handle = channel->b_sock;
 591 #else
 592         unsigned long handle;
 593
 594         handle = channel->b_addr;
 595 #endif
 596         if (id)
 597                 channel->b_conf = (id<<16) + bchannel_pid;
 598         else
 599                 channel->b_conf = 0;
 600         if (channel->b_state == BSTATE_ACTIVE)
 601                 ph_control(handle, CMX_CONF_JOIN, channel->b_conf, "DSP-CONF", channel->b_conf);
 602 }
 603
 604
 605 /*
 606  * main loop for processing messages from mISDN
 607  */
 608 #ifdef SOCKET_MISDN
 609 int bchannel_handle(void)
 610 {
 611         int ret, work = 0;
 612         struct bchannel *channel;
 613         int i;
 614         char buffer[2048+MISDN_HEADER_LEN];
 615         struct mISDNhead *hh = (struct mISDNhead *)buffer;
 616
 617         /* process all bchannels */
 618         channel = bchannel_first;
 619         while(channel)
 620         {
 621                 /* handle message from bchannel */
 622                 if (channel->b_sock > -1)
 623                 {
 624                         ret = recv(channel->b_sock, buffer, sizeof(buffer), 0);
 625                         if (ret >= MISDN_HEADER_LEN)
 626                         {
 627                                 work = 1;
 628                                 switch(hh->prim)
 629                                 {
 630                                         /* we don't care about confirms, we use rx data to sync tx */
 631                                         case PH_DATA_CONF:
 632                                         case DL_DATA_CONF:
 633                                         break;
 634
 635                                         /* we receive audio data, we respond to it AND we send tones */
 636                                         case PH_DATA_IND:
 637                                         case DL_DATA_IND:
 638                                         case PH_SIGNAL_IND:
 639                                         case PH_CONTROL | INDICATION:
 640                                         bchannel_receive(channel, hh->prim, hh->dinfo, buffer+MISDN_HEADER_LEN, ret-MISDN_HEADER_LEN);
 641                                         break;
 642
 643                                         case PH_ACTIVATE_IND:
 644                                         case DL_ESTABLISH_IND:
 645                                         case PH_ACTIVATE_CONF:
 646                                         case DL_ESTABLISH_CONF:
 647                                         PDEBUG("DL_ESTABLISH confirm: bchannel is now activated (socket %d).\n", channel->b_sock);
 648                                         bchannel_activated(channel);
 649                                         break;
 650
 651                                         case PH_DEACTIVATE_IND:
 652                                         case DL_RELEASE_IND:
 653                                         case PH_DEACTIVATE_CONF:
 654                                         case DL_RELEASE_CONF:
 655                                         PDEBUG("DL_RELEASE confirm: bchannel is now de-activated (socket %d).\n", channel->b_sock);
 656 //                                      bchannel_deactivated(channel);
 657                                         break;
 658
 659                                         default:
 660                                         PERROR("child message not handled: prim(0x%x) socket(%d) msg->len(%d)\n", hh->prim, channel->b_sock, msg->len);
 661                                 }
 662                         } else
 663                         {
 664                                 if (ret < 0 && errno != EWOULDBLOCK)
 665                                         PERROR("Read from socket %d failed with return code %d\n", channel->b_sock, ret);
 666                         }
 667                 }
 668                 channel = channel->next;
 669         }
 670
 671         /* if we received at least one b-frame, we will return 1 */
 672         return(work);
 673 }
 674 #else
 675 int bchannel_handle(void)
 676 {
 677         int i;
 678         struct bchannel *channel;
 679         iframe_t *frm;
 680         unsigned char buffer[2048];
 681         struct mISDNhead *hh = (struct mISDNhead *)buffer;
 682         int len;
 683
 684         /* no device, no read */
 685         if (bchannel_device < 0)
 686                 return(0);
 687
 688         /* get message from kernel */
 689         len = mISDN_read(bchannel_device, buffer, sizeof(buffer), 0);
 690         if (len < 0)
 691         {
 692                 if (errno == EAGAIN)
 693                         return(0);
 694                 PERROR("Failed to do mISDN_read()\n");
 695                 return(0);
 696         }
 697         if (!len)
 698         {
 699 //              printf("%s: ERROR: mISDN_read() returns nothing\n");
 700                 return(0);
 701         }
 702         frm = (iframe_t *)buffer;
 703
 704         /* global prim */
 705         switch(frm->prim)
 706         {
 707                 case MGR_DELLAYER | CONFIRM:
 708                 case MGR_INITTIMER | CONFIRM:
 709                 case MGR_ADDTIMER | CONFIRM:
 710                 case MGR_DELTIMER | CONFIRM:
 711                 case MGR_REMOVETIMER | CONFIRM:
 712                 return(1);
 713         }
 714
 715         /* find the mISDNport that belongs to the stack */
 716         channel = bchannel_first;
 717         while(channel)
 718         {
 719                 if (frm->addr == channel->b_addr)
 720                         break;
 721                 channel = channel->next;
 722         }
 723         if (!channel)
 724         {
 725                 PERROR("message belongs to no channel: prim(0x%x) addr(0x%x) msg->len(%d)\n", frm->prim, frm->addr, len);
 726                 goto out;
 727         }
 728
 729         /* b-message */
 730         switch(frm->prim)
 731         {
 732                 /* we don't care about confirms, we use rx data to sync tx */
 733                 case PH_DATA | CONFIRM:
 734                 case DL_DATA | CONFIRM:
 735                 break;
 736
 737                 /* we receive audio data, we respond to it AND we send tones */
 738                 case PH_DATA | INDICATION:
 739                 case DL_DATA | INDICATION:
 740                 case PH_CONTROL | INDICATION:
 741                 case PH_SIGNAL | INDICATION:
 742                 bchannel_receive(channel, frm->prim, frm->dinfo, (unsigned char *)frm->data.p, frm->len);
 743                 break;
 744
 745                 case PH_ACTIVATE | INDICATION:
 746                 case DL_ESTABLISH | INDICATION:
 747                 case PH_ACTIVATE | CONFIRM:
 748                 case DL_ESTABLISH | CONFIRM:
 749                 PDEBUG( "DL_ESTABLISH confirm: bchannel is now activated (address 0x%x).\n", frm->addr);
 750                 bchannel_activated(channel);
 751                 break;
 752
 753                 case PH_DEACTIVATE | INDICATION:
 754                 case DL_RELEASE | INDICATION:
 755                 case PH_DEACTIVATE | CONFIRM:
 756                 case DL_RELEASE | CONFIRM:
 757                 PDEBUG("DL_RELEASE confirm: bchannel is now de-activated (address 0x%x).\n", frm->addr);
 758 //              bchannel_deactivated(channel);
 759                 break;
 760
 761                 default:
 762                 PERROR("message not handled: prim(0x%x) addr(0x%x) msg->len(%d)\n", frm->prim, frm->addr, len);
 763         }
 764
 765         out:
 766         return(1);
 767 }
 768 #endif
 769
 770
 771 /*
 772  * bchannel channel handling
 773  */
 774 struct bchannel *bchannel_first = NULL;
 775 struct bchannel *find_bchannel_handle(unsigned long handle)
 776 {
 777         struct bchannel *channel = bchannel_first;
 778
 779         while(channel)
 780         {
 781                 if (channel->handle == handle)
 782                         break;
 783                 channel = channel->next;
 784         }
 785         return(channel);
 786 }
 787
 788 struct bchannel *find_bchannel_ref(unsigned long ref)
 789 {
 790         struct bchannel *channel = bchannel_first;
 791
 792         while(channel)
 793         {
 794                 if (channel->ref == ref)
 795                         break;
 796                 channel = channel->next;
 797         }
 798         return(channel);
 799 }
 800
 801 struct bchannel *alloc_bchannel(unsigned long handle)
 802 {
 803         struct bchannel **channelp = &bchannel_first;
 804
 805         while(*channelp)
 806                 channelp = &((*channelp)->next);
 807
 808         *channelp = (struct bchannel *)malloc(sizeof(struct bchannel));
 809         if (!*channelp)
 810                 return(NULL);
 811         (*channelp)->handle = handle;
 812         (*channelp)->b_state = BSTATE_IDLE;
 813
 814         return(*channelp);
 815 }
 816
 817 void free_bchannel(struct bchannel *channel)
 818 {
 819         struct bchannel **temp = &bchannel_first;
 820
 821         while(*temp)
 822         {
 823                 if (*temp == channel)
 824                 {
 825                         *temp = (*temp)->next;
 826 #ifdef SOCKET_MISDN
 827                         if (channel->b_sock > -1)
 828 #else
 829                         if (channel->b_stid)
 830 #endif
 831                         bchannel_destroy(channel);
 832                         if (channel->call)
 833                         {
 834                                 if (channel->call->channel)
 835                                         channel->call->channel = NULL;
 836                         }
 837                         if (channel->bridge_channel)
 838                         {
 839                                 if (channel->bridge_channel->bridge_channel)
 840                                         channel->bridge_channel->bridge_channel = NULL;
 841                         }
 842                         free(channel);
 843                         return;
 844                 }
 845                 temp = &((*temp)->next);
 846         }
 847 }
 848
 849