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 #include <stdio.h>
  13 #include <stdlib.h>
  14 #include <unistd.h>
  15 #include <string.h>
  16 #include <poll.h>
  17 #include <errno.h>
  18 #include <sys/ioctl.h>
  19 #include <sys/types.h>
  20 #include <sys/stat.h>
  21 #include <fcntl.h>
  22 #ifdef SOCKET_MISDN
  23 #include <netinet/udp.h>
  24 #include <netinet/in.h>
  25 #include <netdb.h>
  26 #include <sys/socket.h>
  27 #else
  28 #include <mISDNuser/isdn_net.h>
  29 #include <mISDNuser/net_l3.h>
  30 #endif
  31
  32 #include "extension.h"
  33 #include "message.h"
  34 #include "lcrsocket.h"
  35 #include "cause.h"
  36 #include "bchannel.h"
  37 #include "chan_lcr.h"
  38 #include "callerid.h"
  39
  40
  41 #ifndef ISDN_PID_L4_B_USER
  42 #define ISDN_PID_L4_B_USER 0x440000ff
  43 #endif
  44
  45 #define PERROR(arg...) fprintf(stderr, ##arg)
  46 #define PDEBUG(arg...) while(0)
  47
  48 pid_t   bchannel_pid;
  49
  50 enum {
  51         BSTATE_IDLE,
  52         BSTATE_ACTIVATING,
  53         BSTATE_ACTIVE,
  54 };
  55
  56 #ifdef SOCKET_MISDN
  57
  58 int bchannel_initialize(void)
  59 {
  60         return(0);
  61 }
  62
  63 void bchannel_deinitialize(void)
  64 {
  65 }
  66 #else
  67 int bchannel_entity = 0; /* used for udevice */
  68 int bchannel_device = -1; /* the device handler and port list */
  69
  70 int bchannel_initialize(void)
  71 {
  72         unsigned char buff[1025];
  73         iframe_t *frm = (iframe_t *)buff;
  74         int ret;
  75
  76         /* open mISDNdevice if not already open */
  77         if (bchannel_device < 0)
  78         {
  79                 ret = mISDN_open();
  80                 if (ret < 0)
  81                 {
  82                         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));
  83                         return(-1);
  84                 }
  85                 bchannel_device = ret;
  86                 PDEBUG("mISDN device opened.\n");
  87
  88                 /* create entity for layer 3 TE-mode */
  89                 mISDN_write_frame(bchannel_device, buff, 0, MGR_NEWENTITY | REQUEST, 0, 0, NULL, TIMEOUT_1SEC);
  90                 ret = mISDN_read_frame(bchannel_device, frm, sizeof(iframe_t), 0, MGR_NEWENTITY | CONFIRM, TIMEOUT_1SEC);
  91                 if (ret < (int)mISDN_HEADER_LEN)
  92                 {
  93                         noentity:
  94                         PERROR("Cannot request MGR_NEWENTITY from mISDN. Exitting due to software bug.");
  95                         return(-1);
  96                 }
  97                 bchannel_entity = frm->dinfo & 0xffff;
  98                 if (!bchannel_entity)
  99                         goto noentity;
 100         }
 101         return(0);
 102 }
 103
 104 void bchannel_deinitialize(void)
 105 {
 106         unsigned char buff[1025];
 107
 108         if (bchannel_device >= 0)
 109         {
 110                 /* free entity */
 111                 mISDN_write_frame(bchannel_device, buff, 0, MGR_DELENTITY | REQUEST, bchannel_entity, 0, NULL, TIMEOUT_1SEC);
 112                 /* close device */
 113                 mISDN_close(bchannel_device);
 114                 bchannel_device = -1;
 115         }
 116 }
 117 #endif
 118
 119 /*
 120  * send control information to the channel (dsp-module)
 121  */
 122 static void ph_control(unsigned long handle, unsigned long c1, unsigned long c2, char *trace_name, int trace_value)
 123 {
 124 #ifdef SOCKET_MISDN
 125         unsigned char buffer[MISDN_HEADER_LEN+sizeof(int)+sizeof(int)];
 126         struct mISDNhead *ctrl = (struct mISDNhead *)buffer;
 127         unsigned long *d = buffer+MISDN_HEADER_LEN;
 128         int ret;
 129
 130         ctrl->prim = PH_CONTROL_REQ;
 131         ctrl->id = 0;
 132         *d++ = c1;
 133         *d++ = c2;
 134         ret = sendto(handle, buffer, MISDN_HEADER_LEN+sizeof(int)*2, 0, NULL, 0);
 135         if (!ret)
 136                 PERROR("Failed to send to socket %d\n", handle);
 137 #else
 138         unsigned char buffer[mISDN_HEADER_LEN+sizeof(int)+sizeof(int)];
 139         iframe_t *ctrl = (iframe_t *)buffer;
 140         unsigned long *d = (unsigned long *)&ctrl->data.p;
 141
 142         ctrl->prim = PH_CONTROL | REQUEST;
 143         ctrl->addr = handle | FLG_MSG_DOWN;
 144         ctrl->dinfo = 0;
 145         ctrl->len = sizeof(int)*2;
 146         *d++ = c1;
 147         *d++ = c2;
 148         mISDN_write(bchannel_device, ctrl, mISDN_HEADER_LEN+ctrl->len, TIMEOUT_1SEC);
 149 #endif
 150 #if 0
 151         chan_trace_header(mISDNport, isdnport, "BCHANNEL control", DIRECTION_OUT);
 152         if (c1 == CMX_CONF_JOIN)
 153                 add_trace(trace_name, NULL, "0x%08x", trace_value);
 154         else
 155                 add_trace(trace_name, NULL, "%d", trace_value);
 156         end_trace();
 157 #endif
 158 }
 159
 160 static void ph_control_block(unsigned long handle, unsigned long c1, void *c2, int c2_len, char *trace_name, int trace_value)
 161 {
 162 #ifdef SOCKET_MISDN
 163         unsigned char buffer[MISDN_HEADER_LEN+sizeof(int)+c2_len];
 164         struct mISDNhead *ctrl = (struct mISDNhead *)buffer;
 165         unsigned long *d = buffer+MISDN_HEADER_LEN;
 166         int ret;
 167
 168         ctrl->prim = PH_CONTROL_REQ;
 169         ctrl->id = 0;
 170         *d++ = c1;
 171         memcpy(d, c2, c2_len);
 172         ret = sendto(handle, buffer, MISDN_HEADER_LEN+sizeof(int)+c2_len, 0, NULL, 0);
 173         if (!ret)
 174                 PERROR("Failed to send to socket %d\n", handle);
 175 #else
 176         unsigned char buffer[mISDN_HEADER_LEN+sizeof(int)+c2_len];
 177         iframe_t *ctrl = (iframe_t *)buffer;
 178         unsigned long *d = (unsigned long *)&ctrl->data.p;
 179
 180         ctrl->prim = PH_CONTROL | REQUEST;
 181         ctrl->addr = handle | FLG_MSG_DOWN;
 182         ctrl->dinfo = 0;
 183         ctrl->len = sizeof(int)+c2_len;
 184         *d++ = c1;
 185         memcpy(d, c2, c2_len);
 186         mISDN_write(bchannel_device, ctrl, mISDN_HEADER_LEN+ctrl->len, TIMEOUT_1SEC);
 187 #endif
 188 #if 0
 189         chan_trace_header(mISDNport, isdnport, "BCHANNEL control", DIRECTION_OUT);
 190         add_trace(trace_name, NULL, "%d", trace_value);
 191         end_trace();
 192 #endif
 193 }
 194
 195
 196 /*
 197  * create stack
 198  */
 199 int bchannel_create(struct bchannel *bchannel)
 200 {
 201         unsigned char buff[1024];
 202         int ret;
 203 #ifdef SOCKET_MISDN
 204         unsigned long on = 1;
 205         struct sockadd_mISDN addr;
 206
 207         if (bchannel->b_sock)
 208         {
 209                 PERROR("Error: Socket already created for handle 0x%x\n", bchannel->handle);
 210                 return(0);
 211         }
 212
 213         /* open socket */
 214         channel->b_sock = socket(PF_ISDN, SOCK_DGRAM, ISDN_P_B_L2DSP);
 215         if (bchannel->b_sock < 0)
 216         {
 217                 PERROR("Error: Failed to open bchannel-socket for handle 0x%x with mISDN-DSP layer. Did you load mISDNdsp.ko?\n", bchannel->handle);
 218                 return(0);
 219         }
 220
 221         /* set nonblocking io */
 222         ret = ioctl(bchannel->b_sock, FIONBIO, &on);
 223         if (ret < 0)
 224         {
 225                 PERROR("Error: Failed to set bchannel-socket handle 0x%x into nonblocking IO\n", bchannel->handle);
 226                 close(bchannel->b_sock);
 227                 channel->b_sock = -1;
 228                 return(0);
 229         }
 230
 231         /* bind socket to bchannel */
 232         addr.family = AF_ISDN;
 233         addr.dev = (bchannel->handle>>8)-1;
 234         addr.channel = bchannel->handle && 0xff;
 235         ret = bind(bchannel->b_sock, (struct sockaddr *)&addr, sizeof(addr));
 236         if (ret < 0)
 237         {
 238                 PERROR("Error: Failed to bind bchannel-socket for handle 0x%x with mISDN-DSP layer. Did you load mISDNdsp.ko?\n", bchannel->handle);
 239                 close(bchannel->b_sock);
 240                 channel->b_sock = -1;
 241                 return(0);
 242         }
 243
 244 #if 0
 245         chan_trace_header(mISDNport, mISDNport->b_port[i], "BCHANNEL create socket", DIRECTION_OUT);
 246         add_trace("channel", NULL, "%d", i+1+(i>=15));
 247         add_trace("socket", NULL, "%d", mISDNport->b_socket[i]);
 248         end_trace();
 249 #endif
 250 #else
 251         layer_info_t li;
 252         mISDN_pid_t pid;
 253
 254         if (bchannel->b_stid)
 255         {
 256                 PERROR("Error: stack already created for address 0x%lx\n", bchannel->b_stid);
 257                 return(0);
 258         }
 259
 260         if (bchannel->b_addr)
 261         {
 262                 PERROR("Error: stack already created for address 0x%lx\n", bchannel->b_addr);
 263                 return(0);
 264         }
 265
 266         /* create new layer */
 267         PDEBUG("creating new layer for stid 0x%lx.\n" , bchannel->handle);
 268         memset(&li, 0, sizeof(li));
 269         memset(&pid, 0, sizeof(pid));
 270         li.object_id = -1;
 271         li.extentions = 0;
 272         li.st = bchannel->handle;
 273         strcpy(li.name, "B L4");
 274         li.pid.layermask = ISDN_LAYER((4));
 275         li.pid.protocol[4] = ISDN_PID_L4_B_USER;
 276         ret = mISDN_new_layer(bchannel_device, &li);
 277         if (ret)
 278         {
 279                 failed_new_layer:
 280                 PERROR("mISDN_new_layer() failed to add bchannel for stid 0x%lx.\n", bchannel->handle);
 281                 goto failed;
 282         }
 283         if (!li.id)
 284         {
 285                 goto failed_new_layer;
 286         }
 287         bchannel->b_stid = bchannel->handle;
 288         bchannel->b_addr = li.id;
 289         PDEBUG("new layer (b_addr=0x%x)\n", bchannel->b_addr);
 290
 291         /* create new stack */
 292         pid.protocol[1] = ISDN_PID_L1_B_64TRANS;
 293         pid.protocol[2] = ISDN_PID_L2_B_TRANS;
 294         pid.protocol[3] = ISDN_PID_L3_B_DSP;
 295         pid.protocol[4] = ISDN_PID_L4_B_USER;
 296         pid.layermask = ISDN_LAYER((1)) | ISDN_LAYER((2)) | ISDN_LAYER((3)) | ISDN_LAYER((4));
 297         ret = mISDN_set_stack(bchannel_device, bchannel->b_stid, &pid);
 298         if (ret)
 299         {
 300                 stack_error:
 301                 PERROR("mISDN_set_stack() failed (ret=%d) to add bchannel stid=0x%lx\n", ret, bchannel->b_stid);
 302                 mISDN_write_frame(bchannel_device, buff, bchannel->b_addr, MGR_DELLAYER | REQUEST, 0, 0, NULL, TIMEOUT_1SEC);
 303                 goto failed;
 304         }
 305         ret = mISDN_get_setstack_ind(bchannel_device, bchannel->b_addr);
 306         if (ret)
 307                 goto stack_error;
 308
 309         /* get layer id */
 310         bchannel->b_addr = mISDN_get_layerid(bchannel_device, bchannel->b_stid, 4);
 311         if (!bchannel->b_addr)
 312                 goto stack_error;
 313 #if 0
 314         chan_trace_header(mISDNport, mISDNport->b_port[i], "BCHANNEL create stack", DIRECTION_OUT);
 315         add_trace("channel", NULL, "%d", i+1+(i>=15));
 316         add_trace("stack", "id", "0x%08x", mISDNport->b_stid[i]);
 317         add_trace("stack", "address", "0x%08x", mISDNport->b_addr[i]);
 318         end_trace();
 319 #endif
 320 #endif
 321
 322         return(1);
 323
 324 failed:
 325         bchannel->b_stid = 0;
 326         bchannel->b_addr = 0;
 327         return(0);
 328 }
 329
 330
 331 /*
 332  * activate / deactivate request
 333  */
 334 void bchannel_activate(struct bchannel *bchannel, int activate)
 335 {
 336 #ifdef SOCKET_MISDN
 337         struct mISDNhead act;
 338         int ret;
 339
 340         act.prim = (activate)?DL_ESTABLISH_REQ:DL_RELEASE_REQ;
 341         act.id = 0;
 342         ret = sendto(bchannel->b_sock, &act, MISDN_HEADER_LEN, 0, NULL, 0);
 343         if (!ret)
 344                 PERROR("Failed to send to socket %d\n", bchannel->b_sock);
 345 #else
 346         iframe_t act;
 347
 348         /* activate bchannel */
 349         act.prim = (activate?DL_ESTABLISH:DL_RELEASE) | REQUEST;
 350         act.addr = bchannel->b_addr | FLG_MSG_DOWN;
 351         act.dinfo = 0;
 352         act.len = 0;
 353         mISDN_write(bchannel_device, &act, mISDN_HEADER_LEN+act.len, TIMEOUT_1SEC);
 354 #endif
 355
 356         bchannel->b_state = BSTATE_ACTIVATING;
 357 #if 0
 358         /* trace */
 359         chan_trace_header(mISDNport, mISDNport->b_port[i], activate?(char*)"BCHANNEL activate":(char*)"BCHANNEL deactivate", DIRECTION_OUT);
 360         add_trace("channel", NULL, "%d", i+1+(i>=15));
 361         end_trace();
 362 #endif
 363 }
 364
 365
 366 /*
 367  * set features
 368  */
 369 static void bchannel_activated(struct bchannel *bchannel)
 370 {
 371 #ifdef SOCKET_MISDN
 372         int handle;
 373
 374         handle = bchannel->b_sock;
 375 #else
 376         unsigned long handle;
 377
 378         handle = bchannel->b_addr;
 379 #endif
 380
 381         /* set dsp features */
 382         if (bchannel->b_txdata)
 383                 ph_control(handle, (bchannel->b_txdata)?CMX_TXDATA_ON:CMX_TXDATA_OFF, 0, "DSP-TXDATA", bchannel->b_txdata);
 384         if (bchannel->b_delay)
 385                 ph_control(handle, CMX_DELAY, bchannel->b_delay, "DSP-DELAY", bchannel->b_delay);
 386         if (bchannel->b_tx_dejitter)
 387                 ph_control(handle, (bchannel->b_tx_dejitter)?CMX_TX_DEJITTER:CMX_TX_DEJ_OFF, 0, "DSP-DELAY", bchannel->b_tx_dejitter);
 388         if (bchannel->b_tx_gain)
 389                 ph_control(handle, VOL_CHANGE_TX, bchannel->b_tx_gain, "DSP-TX_GAIN", bchannel->b_tx_gain);
 390         if (bchannel->b_rx_gain)
 391                 ph_control(handle, VOL_CHANGE_RX, bchannel->b_rx_gain, "DSP-RX_GAIN", bchannel->b_rx_gain);
 392         if (bchannel->b_pipeline[0])
 393                 ph_control_block(handle, PIPELINE_CFG, bchannel->b_pipeline, strlen(bchannel->b_pipeline)+1, "DSP-PIPELINE", 0);
 394         if (bchannel->b_conf)
 395                 ph_control(handle, CMX_CONF_JOIN, bchannel->b_conf, "DSP-CONF", bchannel->b_conf);
 396         if (bchannel->b_echo)
 397                 ph_control(handle, CMX_ECHO_ON, 0, "DSP-ECHO", 1);
 398         if (bchannel->b_tone)
 399                 ph_control(handle, TONE_PATT_ON, bchannel->b_tone, "DSP-TONE", bchannel->b_tone);
 400         if (bchannel->b_rxoff)
 401                 ph_control(handle, CMX_RECEIVE_OFF, 0, "DSP-RXOFF", 1);
 402 //      if (bchannel->b_txmix)
 403 //              ph_control(handle, CMX_MIX_ON, 0, "DSP-MIX", 1);
 404         if (bchannel->b_dtmf)
 405                 ph_control(handle, DTMF_TONE_START, 0, "DSP-DTMF", 1);
 406         if (bchannel->b_crypt_len)
 407                 ph_control_block(handle, BF_ENABLE_KEY, bchannel->b_crypt_key, bchannel->b_crypt_len, "DSP-CRYPT", bchannel->b_crypt_len);
 408         if (bchannel->b_conf)
 409                 ph_control(handle, CMX_CONF_JOIN, bchannel->b_conf, "DSP-CONF", bchannel->b_conf);
 410
 411         bchannel->b_state = BSTATE_ACTIVE;
 412 }
 413
 414 /*
 415  * destroy stack
 416  */
 417 static void bchannel_destroy(struct bchannel *bchannel)
 418 {
 419 #ifdef SOCKET_MISDN
 420 #if 0
 421         chan_trace_header(mISDNport, mISDNport->b_port[i], "BCHANNEL remove socket", DIRECTION_OUT);
 422         add_trace("channel", NULL, "%d", i+1+(i>=15));
 423         add_trace("socket", NULL, "%d", mISDNport->b_socket[i]);
 424         end_trace();
 425 #endif
 426         if (bchannel->b_sock > -1)
 427         {
 428                 close(bchannel->b_sock);
 429                 bchannel->b_sock = -1;
 430         }
 431 #else
 432         unsigned char buff[1024];
 433
 434 #if 0
 435         chan_trace_header(mISDNport, mISDNport->b_port[i], "BCHANNEL remove stack", DIRECTION_OUT);
 436         add_trace("channel", NULL, "%d", i+1+(i>=15));
 437         add_trace("stack", "id", "0x%08x", mISDNport->b_stid[i]);
 438         add_trace("stack", "address", "0x%08x", mISDNport->b_addr[i]);
 439         end_trace();
 440 #endif
 441         /* remove our stack only if set */
 442         if (bchannel->b_addr)
 443         {
 444                 PDEBUG("free stack (b_addr=0x%x)\n", bchannel->b_addr);
 445                 mISDN_clear_stack(bchannel_device, bchannel->b_stid);
 446                 mISDN_write_frame(bchannel_device, buff, bchannel->b_addr | FLG_MSG_DOWN, MGR_DELLAYER | REQUEST, 0, 0, NULL, TIMEOUT_1SEC);
 447                 bchannel->b_stid = 0;
 448                 bchannel->b_addr = 0;
 449         }
 450 #endif
 451         bchannel->b_state = BSTATE_IDLE;
 452 }
 453
 454
 455 /*
 456  * whenever we get audio data from bchannel, we process it here
 457  */
 458 static void bchannel_receive(struct bchannel *bchannel, unsigned long prim, unsigned long dinfo, unsigned char *data, int len)
 459 {
 460         unsigned long cont = *((unsigned long *)data);
 461 //      unsigned char *data_temp;
 462 //      unsigned long length_temp;
 463 //      unsigned char *p;
 464 //      int l;
 465
 466         if (prim == (PH_CONTROL | INDICATION))
 467         {
 468                 if (len < 4)
 469                 {
 470                         PERROR("SHORT READ OF PH_CONTROL INDICATION\n");
 471                         return;
 472                 }
 473                 if ((cont&(~DTMF_TONE_MASK)) == DTMF_TONE_VAL)
 474                 {
 475 #if 0
 476                         chan_trace_header(p_m_mISDNport, this, "BCHANNEL control", DIRECTION_IN);
 477                         add_trace("DTMF", NULL, "%c", cont & DTMF_TONE_MASK);
 478                         end_trace();
 479 #endif
 480                         if (bchannel->rx_dtmf)
 481                                 bchannel->rx_dtmf(bchannel, cont & DTMF_TONE_MASK);
 482                         return;
 483                 }
 484                 switch(cont)
 485                 {
 486                         case BF_REJECT:
 487 #if 0
 488                         chan_trace_header(p_m_mISDNport, this, "BCHANNEL control", DIRECTION_IN);
 489                         add_trace("DSP-CRYPT", NULL, "error");
 490                         end_trace();
 491 #endif
 492                         break;
 493
 494                         case BF_ACCEPT:
 495 #if 0
 496                         chan_trace_header(p_m_mISDNport, this, "BCHANNEL control", DIRECTION_IN);
 497                         add_trace("DSP-CRYPT", NULL, "ok");
 498                         end_trace();
 499 #endif
 500                         break;
 501
 502                         default:
 503 #if 0
 504                         chan_trace_header(p_m_mISDNport, this, "BCHANNEL control", DIRECTION_IN);
 505                         add_trace("unknown", NULL, "0x%x", cont);
 506                         end_trace();
 507 #else
 508                         ;
 509 #endif
 510                 }
 511                 return;
 512         }
 513         if (prim == (PH_SIGNAL | INDICATION))
 514         {
 515                 switch(dinfo)
 516                 {
 517                         case CMX_TX_DATA:
 518                         if (!bchannel->b_txdata)
 519                         {
 520                                 /* if tx is off, it may happen that fifos send us pending informations, we just ignore them */
 521                                 PDEBUG("PmISDN(%s) ignoring tx data, because 'txdata' is turned off\n", p_name);
 522                                 return;
 523                         }
 524                         break;
 525
 526                         default:
 527 #if 0
 528                         chan_trace_header(p_m_mISDNport, this, "BCHANNEL signal", DIRECTION_IN);
 529                         add_trace("unknown", NULL, "0x%x", frm->dinfo);
 530                         end_trace();
 531 #else
 532                         ;
 533 #endif
 534                 }
 535                 return;
 536         }
 537         if (prim != PH_DATA_IND && prim != DL_DATA_IND)
 538         {
 539                 PERROR("Bchannel received unknown primitve: 0x%lx\n", prim);
 540                 return;
 541         }
 542         /* calls will not process any audio data unless
 543          * the call is connected OR interface features audio during call setup.
 544          */
 545
 546         /* if rx is off, it may happen that fifos send us pending informations, we just ignore them */
 547         if (bchannel->b_rxoff)
 548         {
 549                 PDEBUG("PmISDN(%s) ignoring data, because rx is turned off\n", p_name);
 550                 return;
 551         }
 552
 553         if (bchannel->rx_data)
 554                 bchannel->rx_data(bchannel, data, len);
 555 }
 556
 557
 558 /*
 559  * transmit data to bchannel
 560  */
 561 void bchannel_transmit(struct bchannel *bchannel, unsigned char *data, int len)
 562 {
 563         unsigned char buff[1025];
 564         iframe_t *frm = (iframe_t *)buff;
 565
 566         if (bchannel->b_state != BSTATE_ACTIVE)
 567                 return;
 568 #ifdef SOCKET_MISDN
 569         frm->prim = DL_DATA_REQ;
 570         frm->id = 0;
 571         ret = sendto(bchannel->b_sock, data, len, 0, NULL, 0);
 572         if (!ret)
 573                 PERROR("Failed to send to socket %d\n", bchannel->b_sock);
 574 #else
 575         frm->prim = DL_DATA | REQUEST;
 576         frm->addr = bchannel->b_addr | FLG_MSG_DOWN;
 577         frm->dinfo = 0;
 578         frm->len = len;
 579         if (frm->len)
 580                 mISDN_write(bchannel_device, frm, mISDN_HEADER_LEN+frm->len, TIMEOUT_1SEC);
 581 #endif
 582 }
 583
 584
 585 /*
 586  * join bchannel
 587  */
 588 void bchannel_join(struct bchannel *bchannel, unsigned short id)
 589 {
 590 #ifdef SOCKET_MISDN
 591         int handle;
 592
 593         handle = bchannel->b_sock;
 594 #else
 595         unsigned long handle;
 596
 597         handle = bchannel->b_addr;
 598 #endif
 599         if (id)
 600                 bchannel->b_conf = (id<<16) + bchannel_pid;
 601         else
 602                 bchannel->b_conf = 0;
 603         if (bchannel->b_state == BSTATE_ACTIVE)
 604                 ph_control(handle, CMX_CONF_JOIN, bchannel->b_conf, "DSP-CONF", bchannel->b_conf);
 605 }
 606
 607
 608 /*
 609  * main loop for processing messages from mISDN
 610  */
 611 #ifdef SOCKET_MISDN
 612 int bchannel_handle(void)
 613 {
 614         int ret, work = 0;
 615         struct bchannel *bchannel;
 616         int i;
 617         char buffer[2048+MISDN_HEADER_LEN];
 618         struct mISDNhead *hh = (struct mISDNhead *)buffer;
 619
 620         /* process all bchannels */
 621         bchannel = bchannel_first;
 622         while(bchannel)
 623         {
 624                 /* handle message from bchannel */
 625                 if (bchannel->b_sock > -1)
 626                 {
 627                         ret = recv(bchannel->b_sock, buffer, sizeof(buffer), 0);
 628                         if (ret >= MISDN_HEADER_LEN)
 629                         {
 630                                 work = 1;
 631                                 switch(hh->prim)
 632                                 {
 633                                         /* we don't care about confirms, we use rx data to sync tx */
 634                                         case PH_DATA_CONF:
 635                                         case DL_DATA_CONF:
 636                                         break;
 637
 638                                         /* we receive audio data, we respond to it AND we send tones */
 639                                         case PH_DATA_IND:
 640                                         case DL_DATA_IND:
 641                                         case PH_SIGNAL_IND:
 642                                         case PH_CONTROL | INDICATION:
 643                                         bchannel_receive(bchannel, hh->prim, hh->dinfo, buffer+MISDN_HEADER_LEN, ret-MISDN_HEADER_LEN);
 644                                         break;
 645
 646                                         case PH_ACTIVATE_IND:
 647                                         case DL_ESTABLISH_IND:
 648                                         case PH_ACTIVATE_CONF:
 649                                         case DL_ESTABLISH_CONF:
 650                                         PDEBUG("DL_ESTABLISH confirm: bchannel is now activated (socket %d).\n", bchannel->b_sock);
 651                                         bchannel_activated(bchannel);
 652                                         break;
 653
 654                                         case PH_DEACTIVATE_IND:
 655                                         case DL_RELEASE_IND:
 656                                         case PH_DEACTIVATE_CONF:
 657                                         case DL_RELEASE_CONF:
 658                                         PDEBUG("DL_RELEASE confirm: bchannel is now de-activated (socket %d).\n", bchannel->b_sock);
 659 //                                      bchannel_deactivated(bchannel);
 660                                         break;
 661
 662                                         default:
 663                                         PERROR("child message not handled: prim(0x%x) socket(%d) msg->len(%d)\n", hh->prim, bchannel->b_sock, msg->len);
 664                                 }
 665                         } else
 666                         {
 667                                 if (ret < 0 && errno != EWOULDBLOCK)
 668                                         PERROR("Read from socket %d failed with return code %d\n", bchannel->b_sock, ret);
 669                         }
 670                 }
 671                 bchannel = bchannel->next;
 672         }
 673
 674         /* if we received at least one b-frame, we will return 1 */
 675         return(work);
 676 }
 677 #else
 678 int bchannel_handle(void)
 679 {
 680         struct bchannel *bchannel;
 681         iframe_t *frm;
 682         unsigned char buffer[2048];
 683         int len;
 684
 685         /* no device, no read */
 686         if (bchannel_device < 0)
 687                 return(0);
 688
 689         /* get message from kernel */
 690         len = mISDN_read(bchannel_device, buffer, sizeof(buffer), 0);
 691         if (len < 0)
 692         {
 693                 if (errno == EAGAIN)
 694                         return(0);
 695                 PERROR("Failed to do mISDN_read()\n");
 696                 return(0);
 697         }
 698         if (!len)
 699         {
 700 //              printf("%s: ERROR: mISDN_read() returns nothing\n");
 701                 return(0);
 702         }
 703         frm = (iframe_t *)buffer;
 704
 705         /* global prim */
 706         switch(frm->prim)
 707         {
 708                 case MGR_DELLAYER | CONFIRM:
 709                 case MGR_INITTIMER | CONFIRM:
 710                 case MGR_ADDTIMER | CONFIRM:
 711                 case MGR_DELTIMER | CONFIRM:
 712                 case MGR_REMOVETIMER | CONFIRM:
 713                 return(1);
 714         }
 715
 716         /* find the mISDNport that belongs to the stack */
 717         bchannel = bchannel_first;
 718         while(bchannel)
 719         {
 720                 if (frm->addr == bchannel->b_addr)
 721                         break;
 722                 bchannel = bchannel->next;
 723         }
 724         if (!bchannel)
 725         {
 726                 PERROR("message belongs to no bchannel: prim(0x%x) addr(0x%x) msg->len(%d)\n", frm->prim, frm->addr, len);
 727                 goto out;
 728         }
 729
 730         /* b-message */
 731         switch(frm->prim)
 732         {
 733                 /* we don't care about confirms, we use rx data to sync tx */
 734                 case PH_DATA | CONFIRM:
 735                 case DL_DATA | CONFIRM:
 736                 break;
 737
 738                 /* we receive audio data, we respond to it AND we send tones */
 739                 case PH_DATA | INDICATION:
 740                 case DL_DATA | INDICATION:
 741                 case PH_CONTROL | INDICATION:
 742                 case PH_SIGNAL | INDICATION:
 743                 bchannel_receive(bchannel, frm->prim, frm->dinfo, (unsigned char *)frm->data.p, frm->len);
 744                 break;
 745
 746                 case PH_ACTIVATE | INDICATION:
 747                 case DL_ESTABLISH | INDICATION:
 748                 case PH_ACTIVATE | CONFIRM:
 749                 case DL_ESTABLISH | CONFIRM:
 750                 PDEBUG( "DL_ESTABLISH confirm: bchannel is now activated (address 0x%x).\n", frm->addr);
 751                 bchannel_activated(bchannel);
 752                 break;
 753
 754                 case PH_DEACTIVATE | INDICATION:
 755                 case DL_RELEASE | INDICATION:
 756                 case PH_DEACTIVATE | CONFIRM:
 757                 case DL_RELEASE | CONFIRM:
 758                 PDEBUG("DL_RELEASE confirm: bchannel is now de-activated (address 0x%x).\n", frm->addr);
 759 //              bchannel_deactivated(bchannel);
 760                 break;
 761
 762                 default:
 763                 PERROR("message not handled: prim(0x%x) addr(0x%x) msg->len(%d)\n", frm->prim, frm->addr, len);
 764         }
 765
 766         out:
 767         return(1);
 768 }
 769 #endif
 770
 771
 772 /*
 773  * bchannel channel handling
 774  */
 775 struct bchannel *bchannel_first = NULL;
 776 struct bchannel *find_bchannel_handle(unsigned long handle)
 777 {
 778         struct bchannel *bchannel = bchannel_first;
 779
 780         while(bchannel)
 781         {
 782                 if (bchannel->handle == handle)
 783                         break;
 784                 bchannel = bchannel->next;
 785         }
 786         return(bchannel);
 787 }
 788
 789 #if 0
 790 struct bchannel *find_bchannel_ref(unsigned long ref)
 791 {
 792         struct bchannel *bchannel = bchannel_first;
 793
 794         while(bchannel)
 795         {
 796                 if (bchannel->ref == ref)
 797                         break;
 798                 bchannel = bchannel->next;
 799         }
 800         return(bchannel);
 801 }
 802 #endif
 803
 804 struct bchannel *alloc_bchannel(unsigned long handle)
 805 {
 806         struct bchannel **bchannelp = &bchannel_first;
 807
 808         while(*bchannelp)
 809                 bchannelp = &((*bchannelp)->next);
 810
 811         *bchannelp = (struct bchannel *)malloc(sizeof(struct bchannel));
 812         if (!*bchannelp)
 813                 return(NULL);
 814         (*bchannelp)->handle = handle;
 815         (*bchannelp)->b_state = BSTATE_IDLE;
 816
 817         return(*bchannelp);
 818 }
 819
 820 void free_bchannel(struct bchannel *bchannel)
 821 {
 822         struct bchannel **temp = &bchannel_first;
 823
 824         while(*temp)
 825         {
 826                 if (*temp == bchannel)
 827                 {
 828                         *temp = (*temp)->next;
 829 #ifdef SOCKET_MISDN
 830                         if (bchannel->b_sock > -1)
 831 #else
 832                         if (bchannel->b_stid)
 833 #endif
 834                                 bchannel_destroy(bchannel);
 835                         if (bchannel->call)
 836                         {
 837                                 if (bchannel->call->bchannel)
 838                                         bchannel->call->bchannel = NULL;
 839                         }
 840                         free(bchannel);
 841                         return;
 842                 }
 843                 temp = &((*temp)->next);
 844         }
 845 }
 846
 847