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 #include <mISDNif.h>
  28 #else
  29 #include <mISDNuser/isdn_net.h>
  30 #include <mISDNuser/net_l3.h>
  31 #endif
  32
  33 #include <asterisk/frame.h>
  34
  35
  36 #include "extension.h"
  37 #include "message.h"
  38 #include "lcrsocket.h"
  39 #include "cause.h"
  40 #include "bchannel.h"
  41 #include "chan_lcr.h"
  42 #include "callerid.h"
  43
  44
  45 #ifndef ISDN_PID_L4_B_USER
  46 #define ISDN_PID_L4_B_USER 0x440000ff
  47 #endif
  48
  49 pid_t   bchannel_pid;
  50
  51 enum {
  52         BSTATE_IDLE,
  53         BSTATE_ACTIVATING,
  54         BSTATE_ACTIVE,
  55 };
  56
  57 #ifdef SOCKET_MISDN
  58
  59 int bchannel_initialize(void)
  60 {
  61         return(0);
  62 }
  63
  64 void bchannel_deinitialize(void)
  65 {
  66 }
  67 #else
  68 int bchannel_entity = 0; /* used for udevice */
  69 int bchannel_device = -1; /* the device handler and port list */
  70
  71 int bchannel_initialize(void)
  72 {
  73         unsigned char buff[1025];
  74         iframe_t *frm = (iframe_t *)buff;
  75         int ret;
  76
  77         /* open mISDNdevice if not already open */
  78         if (bchannel_device < 0)
  79         {
  80                 ret = mISDN_open();
  81                 if (ret < 0)
  82                 {
  83                         CERROR(NULL, NULL, "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));
  84                         return(-1);
  85                 }
  86                 bchannel_device = ret;
  87                 CDEBUG(NULL, NULL, "mISDN device opened.\n");
  88
  89                 /* create entity for layer 3 TE-mode */
  90                 mISDN_write_frame(bchannel_device, buff, 0, MGR_NEWENTITY | REQUEST, 0, 0, NULL, TIMEOUT_1SEC);
  91                 ret = mISDN_read_frame(bchannel_device, frm, sizeof(iframe_t), 0, MGR_NEWENTITY | CONFIRM, TIMEOUT_1SEC);
  92                 if (ret < (int)mISDN_HEADER_LEN)
  93                 {
  94                         noentity:
  95                         CERROR(NULL, NULL, "Cannot request MGR_NEWENTITY from mISDN. Exitting due to software bug.");
  96                         return(-1);
  97                 }
  98                 bchannel_entity = frm->dinfo & 0xffff;
  99                 if (!bchannel_entity)
 100                         goto noentity;
 101         }
 102         return(0);
 103 }
 104
 105 void bchannel_deinitialize(void)
 106 {
 107         unsigned char buff[1025];
 108
 109         if (bchannel_device >= 0)
 110         {
 111                 /* free entity */
 112                 mISDN_write_frame(bchannel_device, buff, 0, MGR_DELENTITY | REQUEST, bchannel_entity, 0, NULL, TIMEOUT_1SEC);
 113                 /* close device */
 114                 mISDN_close(bchannel_device);
 115                 bchannel_device = -1;
 116         }
 117 }
 118 #endif
 119
 120 /*
 121  * send control information to the channel (dsp-module)
 122  */
 123 static void ph_control(unsigned long handle, unsigned long c1, unsigned long c2, char *trace_name, int trace_value)
 124 {
 125 #ifdef SOCKET_MISDN
 126         unsigned char buffer[MISDN_HEADER_LEN+sizeof(int)+sizeof(int)];
 127         struct mISDNhead *ctrl = (struct mISDNhead *)buffer;
 128         unsigned long *d = (unsigned long *)(buffer+MISDN_HEADER_LEN);
 129         int ret;
 130
 131         ctrl->prim = PH_CONTROL_REQ;
 132         ctrl->id = 0;
 133         *d++ = c1;
 134         *d++ = c2;
 135         ret = sendto(handle, buffer, MISDN_HEADER_LEN+sizeof(int)*2, 0, NULL, 0);
 136         if (!ret)
 137                 CERROR(NULL, NULL, "Failed to send to socket %d\n", handle);
 138 #else
 139         unsigned char buffer[mISDN_HEADER_LEN+sizeof(int)+sizeof(int)];
 140         iframe_t *ctrl = (iframe_t *)buffer;
 141         unsigned long *d = (unsigned long *)&ctrl->data.p;
 142
 143         ctrl->prim = PH_CONTROL | REQUEST;
 144         ctrl->addr = handle | FLG_MSG_DOWN;
 145         ctrl->dinfo = 0;
 146         ctrl->len = sizeof(int)*2;
 147         *d++ = c1;
 148         *d++ = c2;
 149         mISDN_write(bchannel_device, ctrl, mISDN_HEADER_LEN+ctrl->len, TIMEOUT_1SEC);
 150 #endif
 151 #if 0
 152         chan_trace_header(mISDNport, isdnport, "BCHANNEL control", DIRECTION_OUT);
 153         if (c1 == CMX_CONF_JOIN)
 154                 add_trace(trace_name, NULL, "0x%08x", trace_value);
 155         else
 156                 add_trace(trace_name, NULL, "%d", trace_value);
 157         end_trace();
 158 #endif
 159 }
 160
 161 static void ph_control_block(unsigned long handle, unsigned long c1, void *c2, int c2_len, char *trace_name, int trace_value)
 162 {
 163 #ifdef SOCKET_MISDN
 164         unsigned char buffer[MISDN_HEADER_LEN+sizeof(int)+c2_len];
 165         struct mISDNhead *ctrl = (struct mISDNhead *)buffer;
 166         unsigned long *d = (unsigned long *)(buffer+MISDN_HEADER_LEN);
 167         int ret;
 168
 169         ctrl->prim = PH_CONTROL_REQ;
 170         ctrl->id = 0;
 171         *d++ = c1;
 172         memcpy(d, c2, c2_len);
 173         ret = sendto(handle, buffer, MISDN_HEADER_LEN+sizeof(int)+c2_len, 0, NULL, 0);
 174         if (!ret)
 175                 CERROR(NULL, NULL, "Failed to send to socket %d\n", handle);
 176 #else
 177         unsigned char buffer[mISDN_HEADER_LEN+sizeof(int)+c2_len];
 178         iframe_t *ctrl = (iframe_t *)buffer;
 179         unsigned long *d = (unsigned long *)&ctrl->data.p;
 180
 181         ctrl->prim = PH_CONTROL | REQUEST;
 182         ctrl->addr = handle | FLG_MSG_DOWN;
 183         ctrl->dinfo = 0;
 184         ctrl->len = sizeof(int)+c2_len;
 185         *d++ = c1;
 186         memcpy(d, c2, c2_len);
 187         mISDN_write(bchannel_device, ctrl, mISDN_HEADER_LEN+ctrl->len, TIMEOUT_1SEC);
 188 #endif
 189 #if 0
 190         chan_trace_header(mISDNport, isdnport, "BCHANNEL control", DIRECTION_OUT);
 191         add_trace(trace_name, NULL, "%d", trace_value);
 192         end_trace();
 193 #endif
 194 }
 195
 196
 197 /*
 198  * create stack
 199  */
 200 int bchannel_create(struct bchannel *bchannel)
 201 {
 202         int ret;
 203 #ifdef SOCKET_MISDN
 204         unsigned long on = 1;
 205         struct sockaddr_mISDN addr;
 206
 207         if (bchannel->b_sock)
 208         {
 209                 CERROR(NULL, NULL, "Socket already created for handle 0x%x\n", bchannel->handle);
 210                 return(0);
 211         }
 212
 213         /* open socket */
 214         bchannel->b_sock = socket(PF_ISDN, SOCK_DGRAM, ISDN_P_B_L2DSP);
 215         if (bchannel->b_sock < 0)
 216         {
 217                 CERROR(NULL, NULL, "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                 CERROR(NULL, NULL, "Failed to set bchannel-socket handle 0x%x into nonblocking IO\n", bchannel->handle);
 226                 close(bchannel->b_sock);
 227                 bchannel->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                 CERROR(NULL, NULL, "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                 bchannel->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         return(1);
 251 }
 252 #else
 253         unsigned char buff[1024];
 254         layer_info_t li;
 255         mISDN_pid_t pid;
 256
 257         if (bchannel->b_stid)
 258         {
 259                 CERROR(NULL, NULL, "Stack already created for address 0x%lx\n", bchannel->b_stid);
 260                 return(0);
 261         }
 262
 263         if (bchannel->b_addr)
 264         {
 265                 CERROR(NULL, NULL, "Stack already created for address 0x%lx\n", bchannel->b_addr);
 266                 return(0);
 267         }
 268
 269         /* create new layer */
 270         CDEBUG(NULL, NULL, "creating new layer for stid 0x%lx.\n" , bchannel->handle);
 271         memset(&li, 0, sizeof(li));
 272         memset(&pid, 0, sizeof(pid));
 273         li.object_id = -1;
 274         li.extentions = 0;
 275         li.st = bchannel->handle;
 276         strcpy(li.name, "B L4");
 277         li.pid.layermask = ISDN_LAYER((4));
 278         li.pid.protocol[4] = ISDN_PID_L4_B_USER;
 279         ret = mISDN_new_layer(bchannel_device, &li);
 280         if (ret)
 281         {
 282                 failed_new_layer:
 283                 CERROR(NULL, NULL, "mISDN_new_layer() failed to add bchannel for stid 0x%lx.\n", bchannel->handle);
 284                 goto failed;
 285         }
 286         if (!li.id)
 287         {
 288                 goto failed_new_layer;
 289         }
 290         bchannel->b_stid = bchannel->handle;
 291         bchannel->b_addr = li.id;
 292         CDEBUG(NULL, NULL, "new layer (b_addr=0x%x)\n", bchannel->b_addr);
 293
 294         /* create new stack */
 295         pid.protocol[1] = ISDN_PID_L1_B_64TRANS;
 296         pid.protocol[2] = ISDN_PID_L2_B_TRANS;
 297         pid.protocol[3] = ISDN_PID_L3_B_DSP;
 298         pid.protocol[4] = ISDN_PID_L4_B_USER;
 299         pid.layermask = ISDN_LAYER((1)) | ISDN_LAYER((2)) | ISDN_LAYER((3)) | ISDN_LAYER((4));
 300         ret = mISDN_set_stack(bchannel_device, bchannel->b_stid, &pid);
 301         if (ret)
 302         {
 303                 stack_error:
 304                 CERROR(NULL, NULL, "mISDN_set_stack() failed (ret=%d) to add bchannel stid=0x%lx\n", ret, bchannel->b_stid);
 305                 mISDN_write_frame(bchannel_device, buff, bchannel->b_addr, MGR_DELLAYER | REQUEST, 0, 0, NULL, TIMEOUT_1SEC);
 306                 goto failed;
 307         }
 308         ret = mISDN_get_setstack_ind(bchannel_device, bchannel->b_addr);
 309         if (ret)
 310                 goto stack_error;
 311
 312         /* get layer id */
 313         bchannel->b_addr = mISDN_get_layerid(bchannel_device, bchannel->b_stid, 4);
 314         if (!bchannel->b_addr)
 315                 goto stack_error;
 316 #if 0
 317         chan_trace_header(mISDNport, mISDNport->b_port[i], "BCHANNEL create stack", DIRECTION_OUT);
 318         add_trace("channel", NULL, "%d", i+1+(i>=15));
 319         add_trace("stack", "id", "0x%08x", mISDNport->b_stid[i]);
 320         add_trace("stack", "address", "0x%08x", mISDNport->b_addr[i]);
 321         end_trace();
 322 #endif
 323
 324         return(1);
 325
 326 failed:
 327         bchannel->b_stid = 0;
 328         bchannel->b_addr = 0;
 329         return(0);
 330 }
 331 #endif
 332
 333
 334 /*
 335  * activate / deactivate request
 336  */
 337 void bchannel_activate(struct bchannel *bchannel, int activate)
 338 {
 339 #ifdef SOCKET_MISDN
 340         struct mISDNhead act;
 341         int ret;
 342
 343         act.prim = (activate)?DL_ESTABLISH_REQ:DL_RELEASE_REQ;
 344         act.id = 0;
 345         ret = sendto(bchannel->b_sock, &act, MISDN_HEADER_LEN, 0, NULL, 0);
 346         if (!ret)
 347                 CERROR(NULL, NULL, "Failed to send to socket %d\n", bchannel->b_sock);
 348 #else
 349         iframe_t act;
 350
 351         /* activate bchannel */
 352         act.prim = (activate?DL_ESTABLISH:DL_RELEASE) | REQUEST;
 353         act.addr = bchannel->b_addr | FLG_MSG_DOWN;
 354         act.dinfo = 0;
 355         act.len = 0;
 356         mISDN_write(bchannel_device, &act, mISDN_HEADER_LEN+act.len, TIMEOUT_1SEC);
 357 #endif
 358
 359         bchannel->b_state = BSTATE_ACTIVATING;
 360 #if 0
 361         /* trace */
 362         chan_trace_header(mISDNport, mISDNport->b_port[i], activate?(char*)"BCHANNEL activate":(char*)"BCHANNEL deactivate", DIRECTION_OUT);
 363         add_trace("channel", NULL, "%d", i+1+(i>=15));
 364         end_trace();
 365 #endif
 366 }
 367
 368
 369 /*
 370  * set features
 371  */
 372 static void bchannel_activated(struct bchannel *bchannel)
 373 {
 374 #ifdef SOCKET_MISDN
 375         int handle;
 376
 377         handle = bchannel->b_sock;
 378 #else
 379         unsigned long handle;
 380
 381         handle = bchannel->b_addr;
 382 #endif
 383
 384         /* set dsp features */
 385         if (bchannel->b_txdata)
 386                 ph_control(handle, (bchannel->b_txdata)?DSP_TXDATA_ON:DSP_TXDATA_OFF, 0, "DSP-TXDATA", bchannel->b_txdata);
 387         if (bchannel->b_delay)
 388                 ph_control(handle, DSP_DELAY, bchannel->b_delay, "DSP-DELAY", bchannel->b_delay);
 389         if (bchannel->b_tx_dejitter)
 390                 ph_control(handle, (bchannel->b_tx_dejitter)?DSP_TX_DEJITTER:DSP_TX_DEJ_OFF, 0, "DSP-TX_DEJITTER", bchannel->b_tx_dejitter);
 391         if (bchannel->b_tx_gain)
 392                 ph_control(handle, DSP_VOL_CHANGE_TX, bchannel->b_tx_gain, "DSP-TX_GAIN", bchannel->b_tx_gain);
 393         if (bchannel->b_rx_gain)
 394                 ph_control(handle, DSP_VOL_CHANGE_RX, bchannel->b_rx_gain, "DSP-RX_GAIN", bchannel->b_rx_gain);
 395         if (bchannel->b_pipeline[0])
 396 #ifdef SOCKET_MISDN
 397                 ph_control_block(handle, DSP_PIPELINE_CFG, bchannel->b_pipeline, strlen(bchannel->b_pipeline)+1, "DSP-PIPELINE", 0);
 398 #else
 399                 ph_control_block(handle, PIPELINE_CFG, bchannel->b_pipeline, strlen(bchannel->b_pipeline)+1, "DSP-PIPELINE", 0);
 400 #endif
 401         if (bchannel->b_conf)
 402                 ph_control(handle, DSP_CONF_JOIN, bchannel->b_conf, "DSP-CONF", bchannel->b_conf);
 403         if (bchannel->b_echo)
 404                 ph_control(handle, DSP_ECHO_ON, 0, "DSP-ECHO", 1);
 405         if (bchannel->b_tone)
 406                 ph_control(handle, DSP_TONE_PATT_ON, bchannel->b_tone, "DSP-TONE", bchannel->b_tone);
 407         if (bchannel->b_rxoff)
 408                 ph_control(handle, DSP_RECEIVE_OFF, 0, "DSP-RXOFF", 1);
 409 //      if (bchannel->b_txmix)
 410 //              ph_control(handle, DSP_MIX_ON, 0, "DSP-MIX", 1);
 411         if (bchannel->b_dtmf)
 412                 ph_control(handle, DTMF_TONE_START, 0, "DSP-DTMF", 1);
 413         if (bchannel->b_crypt_len)
 414                 ph_control_block(handle, DSP_BF_ENABLE_KEY, bchannel->b_crypt_key, bchannel->b_crypt_len, "DSP-CRYPT", bchannel->b_crypt_len);
 415         if (bchannel->b_conf)
 416                 ph_control(handle, DSP_CONF_JOIN, bchannel->b_conf, "DSP-CONF", bchannel->b_conf);
 417
 418         bchannel->b_state = BSTATE_ACTIVE;
 419 }
 420
 421 /*
 422  * destroy stack
 423  */
 424 static void bchannel_destroy(struct bchannel *bchannel)
 425 {
 426 #ifdef SOCKET_MISDN
 427 #if 0
 428         chan_trace_header(mISDNport, mISDNport->b_port[i], "BCHANNEL remove socket", DIRECTION_OUT);
 429         add_trace("channel", NULL, "%d", i+1+(i>=15));
 430         add_trace("socket", NULL, "%d", mISDNport->b_socket[i]);
 431         end_trace();
 432 #endif
 433         if (bchannel->b_sock > -1)
 434         {
 435                 close(bchannel->b_sock);
 436                 bchannel->b_sock = -1;
 437         }
 438 #else
 439         unsigned char buff[1024];
 440
 441 #if 0
 442         chan_trace_header(mISDNport, mISDNport->b_port[i], "BCHANNEL remove stack", DIRECTION_OUT);
 443         add_trace("channel", NULL, "%d", i+1+(i>=15));
 444         add_trace("stack", "id", "0x%08x", mISDNport->b_stid[i]);
 445         add_trace("stack", "address", "0x%08x", mISDNport->b_addr[i]);
 446         end_trace();
 447 #endif
 448         /* remove our stack only if set */
 449         if (bchannel->b_addr)
 450         {
 451                 CDEBUG(NULL, NULL, "free stack (b_addr=0x%x)\n", bchannel->b_addr);
 452                 mISDN_clear_stack(bchannel_device, bchannel->b_stid);
 453                 mISDN_write_frame(bchannel_device, buff, bchannel->b_addr | FLG_MSG_DOWN, MGR_DELLAYER | REQUEST, 0, 0, NULL, TIMEOUT_1SEC);
 454                 bchannel->b_stid = 0;
 455                 bchannel->b_addr = 0;
 456         }
 457 #endif
 458         bchannel->b_state = BSTATE_IDLE;
 459 }
 460
 461
 462 /*
 463  * whenever we get audio data from bchannel, we process it here
 464  */
 465 static void bchannel_receive(struct bchannel *bchannel, unsigned long prim, unsigned long dinfo, unsigned char *data, int len)
 466 {
 467         unsigned long cont = *((unsigned long *)data);
 468 //      unsigned char *data_temp;
 469 //      unsigned long length_temp;
 470 //      unsigned char *p;
 471 //      int l;
 472
 473 #ifdef SOCKET_MISDN
 474         if (prim == PH_CONTROL_IND)
 475 #else
 476         if (prim == (PH_CONTROL | INDICATION))
 477 #endif
 478         {
 479                 if (len < 4)
 480                 {
 481                         CERROR(NULL, NULL, "SHORT READ OF PH_CONTROL INDICATION\n");
 482                         return;
 483                 }
 484                 if ((cont&(~DTMF_TONE_MASK)) == DTMF_TONE_VAL)
 485                 {
 486 #if 0
 487                         chan_trace_header(p_m_mISDNport, this, "BCHANNEL control", DIRECTION_IN);
 488                         add_trace("DTMF", NULL, "%c", cont & DTMF_TONE_MASK);
 489                         end_trace();
 490 #endif
 491                         if (bchannel->rx_dtmf)
 492                                 bchannel->rx_dtmf(bchannel, cont & DTMF_TONE_MASK);
 493                         return;
 494                 }
 495                 switch(cont)
 496                 {
 497 #ifdef SOCKET_MISDN
 498                         case DSP_BF_REJECT:
 499 #else
 500                         case BF_REJECT:
 501 #endif
 502 #if 0
 503                         chan_trace_header(p_m_mISDNport, this, "BCHANNEL control", DIRECTION_IN);
 504                         add_trace("DSP-CRYPT", NULL, "error");
 505                         end_trace();
 506 #endif
 507                         break;
 508
 509 #ifdef SOCKET_MISDN
 510                         case DSP_BF_ACCEPT:
 511 #else
 512                         case BF_ACCEPT:
 513 #endif
 514 #if 0
 515                         chan_trace_header(p_m_mISDNport, this, "BCHANNEL control", DIRECTION_IN);
 516                         add_trace("DSP-CRYPT", NULL, "ok");
 517                         end_trace();
 518 #endif
 519                         break;
 520
 521                         default:
 522 #if 0
 523                         chan_trace_header(p_m_mISDNport, this, "BCHANNEL control", DIRECTION_IN);
 524                         add_trace("unknown", NULL, "0x%x", cont);
 525                         end_trace();
 526 #else
 527                         ;
 528 #endif
 529                 }
 530                 return;
 531         }
 532 #ifdef SOCKET_MISDN
 533         if (prim == PH_DATA_REQ)
 534         {
 535                 if (!bchannel->b_txdata)
 536                 {
 537                         /* if tx is off, it may happen that fifos send us pending informations, we just ignore them */
 538                         CDEBUG(NULL, NULL, "ignoring tx data, because 'txdata' is turned off\n");
 539                         return;
 540                 }
 541                 return;
 542         }
 543 #else
 544         if (prim == (PH_SIGNAL | INDICATION))
 545         {
 546                 switch(dinfo)
 547                 {
 548                         case CMX_TX_DATA:
 549                         if (!bchannel->b_txdata)
 550                         {
 551                                 /* if tx is off, it may happen that fifos send us pending informations, we just ignore them */
 552                                 CDEBUG(NULL, NULL, "ignoring tx data, because 'txdata' is turned off\n");
 553                                 return;
 554                         }
 555                         break;
 556
 557                         default:
 558 #if 0
 559                         chan_trace_header(p_m_mISDNport, this, "BCHANNEL signal", DIRECTION_IN);
 560                         add_trace("unknown", NULL, "0x%x", frm->dinfo);
 561                         end_trace();
 562 #else
 563                         ;
 564 #endif
 565                 }
 566                 return;
 567         }
 568 #endif
 569         if (prim != PH_DATA_IND && prim != DL_DATA_IND)
 570         {
 571                 CERROR(NULL, NULL, "Bchannel received unknown primitve: 0x%lx\n", prim);
 572                 return;
 573         }
 574         /* calls will not process any audio data unless
 575          * the call is connected OR interface features audio during call setup.
 576          */
 577
 578         /* if rx is off, it may happen that fifos send us pending informations, we just ignore them */
 579         if (bchannel->b_rxoff)
 580         {
 581                 CDEBUG(NULL, NULL, "ignoring data, because rx is turned off\n");
 582                 return;
 583         }
 584
 585         if (!bchannel->call)
 586         {
 587                 CDEBUG(NULL, NULL, "ignoring data, because no call associated with bchannel\n");
 588                 return;
 589         }
 590         if (!bchannel->call->audiopath)
 591         {
 592                 /* return, because we have no audio from port */
 593                 return;
 594         }
 595         len = write(bchannel->call->pipe[1], data, len);
 596         if (len < 0)
 597         {
 598                 CDEBUG(NULL, NULL, "broken pipe on bchannel pipe\n");
 599                 return;
 600         }
 601 }
 602
 603
 604 /*
 605  * transmit data to bchannel
 606  */
 607 void bchannel_transmit(struct bchannel *bchannel, unsigned char *data, int len)
 608 {
 609         unsigned char buff[1025];
 610 #ifdef SOCKET_MISDN
 611         struct mISDNhead *frm = (struct mISDNhead *)buff;
 612 #else
 613         iframe_t *frm = (iframe_t *)buff;
 614 #endif
 615         int ret;
 616
 617         if (bchannel->b_state != BSTATE_ACTIVE)
 618                 return;
 619 #ifdef SOCKET_MISDN
 620         frm->prim = DL_DATA_REQ;
 621         frm->id = 0;
 622         ret = sendto(bchannel->b_sock, data, len, 0, NULL, 0);
 623         if (!ret)
 624                 CERROR(NULL, NULL, "Failed to send to socket %d\n", bchannel->b_sock);
 625 #else
 626         frm->prim = DL_DATA | REQUEST;
 627         frm->addr = bchannel->b_addr | FLG_MSG_DOWN;
 628         frm->dinfo = 0;
 629         frm->len = len;
 630         if (frm->len)
 631                 mISDN_write(bchannel_device, frm, mISDN_HEADER_LEN+frm->len, TIMEOUT_1SEC);
 632 #endif
 633 }
 634
 635
 636 /*
 637  * join bchannel
 638  */
 639 void bchannel_join(struct bchannel *bchannel, unsigned short id)
 640 {
 641 #ifdef SOCKET_MISDN
 642         int handle;
 643
 644         handle = bchannel->b_sock;
 645 #else
 646         unsigned long handle;
 647
 648         handle = bchannel->b_addr;
 649 #endif
 650         if (id) {
 651                 bchannel->b_conf = (id<<16) + bchannel_pid;
 652                 bchannel->b_rxoff = 1;
 653         } else {
 654                 bchannel->b_conf = 0;
 655                 bchannel->b_rxoff = 0;
 656         }
 657         if (bchannel->b_state == BSTATE_ACTIVE)
 658         {
 659                 ph_control(handle, DSP_RECEIVE_OFF, bchannel->b_rxoff, "DSP-RX_OFF", bchannel->b_conf);
 660                 ph_control(handle, DSP_CONF_JOIN, bchannel->b_conf, "DSP-CONF", bchannel->b_conf);
 661         }
 662 }
 663
 664
 665 /*
 666  * main loop for processing messages from mISDN
 667  */
 668 #ifdef SOCKET_MISDN
 669 int bchannel_handle(void)
 670 {
 671         int ret, work = 0;
 672         struct bchannel *bchannel;
 673         char buffer[2048+MISDN_HEADER_LEN];
 674         struct mISDNhead *hh = (struct mISDNhead *)buffer;
 675
 676         /* process all bchannels */
 677         bchannel = bchannel_first;
 678         while(bchannel)
 679         {
 680                 /* handle message from bchannel */
 681                 if (bchannel->b_sock > -1)
 682                 {
 683                         ret = recv(bchannel->b_sock, buffer, sizeof(buffer), 0);
 684                         if (ret >= MISDN_HEADER_LEN)
 685                         {
 686                                 work = 1;
 687                                 switch(hh->prim)
 688                                 {
 689                                         /* we don't care about confirms, we use rx data to sync tx */
 690                                         case PH_DATA_CNF:
 691                                         break;
 692
 693                                         /* we receive audio data, we respond to it AND we send tones */
 694                                         case PH_DATA_IND:
 695                                         case PH_DATA_REQ:
 696                                         case DL_DATA_IND:
 697                                         case PH_CONTROL_IND:
 698                                         bchannel_receive(bchannel, hh->prim, hh->id, buffer+MISDN_HEADER_LEN, ret-MISDN_HEADER_LEN);
 699                                         break;
 700
 701                                         case PH_ACTIVATE_IND:
 702                                         case DL_ESTABLISH_IND:
 703                                         case PH_ACTIVATE_CNF:
 704                                         case DL_ESTABLISH_CNF:
 705                                         CDEBUG(NULL, NULL, "DL_ESTABLISH confirm: bchannel is now activated (socket %d).\n", bchannel->b_sock);
 706                                         bchannel_activated(bchannel);
 707                                         break;
 708
 709                                         case PH_DEACTIVATE_IND:
 710                                         case DL_RELEASE_IND:
 711                                         case PH_DEACTIVATE_CNF:
 712                                         case DL_RELEASE_CNF:
 713                                         CDEBUG(NULL, NULL, "DL_RELEASE confirm: bchannel is now de-activated (socket %d).\n", bchannel->b_sock);
 714 //                                      bchannel_deactivated(bchannel);
 715                                         break;
 716
 717                                         default:
 718                                         CERROR(NULL, NULL, "child message not handled: prim(0x%x) socket(%d) data len(%d)\n", hh->prim, bchannel->b_sock, ret - MISDN_HEADER_LEN);
 719                                 }
 720                         } else
 721                         {
 722                                 if (ret < 0 && errno != EWOULDBLOCK)
 723                                         CERROR(NULL, NULL, "Read from socket %d failed with return code %d\n", bchannel->b_sock, ret);
 724                         }
 725                 }
 726                 bchannel = bchannel->next;
 727         }
 728
 729         /* if we received at least one b-frame, we will return 1 */
 730         return(work);
 731 }
 732 #else
 733 int bchannel_handle(void)
 734 {
 735         struct bchannel *bchannel;
 736         iframe_t *frm;
 737         unsigned char buffer[2048];
 738         int len;
 739
 740         /* no device, no read */
 741         if (bchannel_device < 0)
 742                 return(0);
 743
 744         /* get message from kernel */
 745         len = mISDN_read(bchannel_device, buffer, sizeof(buffer), 0);
 746         if (len < 0)
 747         {
 748                 if (errno == EAGAIN)
 749                         return(0);
 750                 CERROR(NULL, NULL, "Failed to do mISDN_read()\n");
 751                 return(0);
 752         }
 753         if (!len)
 754         {
 755 //              printf("%s: ERROR: mISDN_read() returns nothing\n");
 756                 return(0);
 757         }
 758         frm = (iframe_t *)buffer;
 759
 760         /* global prim */
 761         switch(frm->prim)
 762         {
 763                 case MGR_DELLAYER | CONFIRM:
 764                 case MGR_INITTIMER | CONFIRM:
 765                 case MGR_ADDTIMER | CONFIRM:
 766                 case MGR_DELTIMER | CONFIRM:
 767                 case MGR_REMOVETIMER | CONFIRM:
 768                 return(1);
 769         }
 770
 771         /* find the mISDNport that belongs to the stack */
 772         bchannel = bchannel_first;
 773         while(bchannel)
 774         {
 775                 if (frm->addr == bchannel->b_addr)
 776                         break;
 777                 bchannel = bchannel->next;
 778         }
 779         if (!bchannel)
 780         {
 781                 CERROR(NULL, NULL, "message belongs to no bchannel: prim(0x%x) addr(0x%x) msg->len(%d)\n", frm->prim, frm->addr, len);
 782                 goto out;
 783         }
 784
 785         /* b-message */
 786         switch(frm->prim)
 787         {
 788                 /* we don't care about confirms, we use rx data to sync tx */
 789                 case PH_DATA | CONFIRM:
 790                 case DL_DATA | CONFIRM:
 791                 break;
 792
 793                 /* we receive audio data, we respond to it AND we send tones */
 794                 case PH_DATA | INDICATION:
 795                 case DL_DATA | INDICATION:
 796                 case PH_CONTROL | INDICATION:
 797                 case PH_SIGNAL | INDICATION:
 798                 bchannel_receive(bchannel, frm->prim, frm->dinfo, (unsigned char *)frm->data.p, frm->len);
 799                 break;
 800
 801                 case PH_ACTIVATE | INDICATION:
 802                 case DL_ESTABLISH | INDICATION:
 803                 case PH_ACTIVATE | CONFIRM:
 804                 case DL_ESTABLISH | CONFIRM:
 805                 CDEBUG(NULL, NULL, "DL_ESTABLISH confirm: bchannel is now activated (address 0x%x).\n", frm->addr);
 806                 bchannel_activated(bchannel);
 807                 break;
 808
 809                 case PH_DEACTIVATE | INDICATION:
 810                 case DL_RELEASE | INDICATION:
 811                 case PH_DEACTIVATE | CONFIRM:
 812                 case DL_RELEASE | CONFIRM:
 813                 CDEBUG(NULL, NULL, "DL_RELEASE confirm: bchannel is now de-activated (address 0x%x).\n", frm->addr);
 814 //              bchannel_deactivated(bchannel);
 815                 break;
 816
 817                 default:
 818                 CERROR(NULL, NULL, "message not handled: prim(0x%x) addr(0x%x) msg->len(%d)\n", frm->prim, frm->addr, len);
 819         }
 820
 821         out:
 822         return(1);
 823 }
 824 #endif
 825
 826
 827 /*
 828  * bchannel channel handling
 829  */
 830 struct bchannel *bchannel_first = NULL;
 831 struct bchannel *find_bchannel_handle(unsigned long handle)
 832 {
 833         struct bchannel *bchannel = bchannel_first;
 834
 835         while(bchannel)
 836         {
 837                 if (bchannel->handle == handle)
 838                         break;
 839                 bchannel = bchannel->next;
 840         }
 841         return(bchannel);
 842 }
 843
 844 #if 0
 845 struct bchannel *find_bchannel_ref(unsigned long ref)
 846 {
 847         struct bchannel *bchannel = bchannel_first;
 848
 849         while(bchannel)
 850         {
 851                 if (bchannel->ref == ref)
 852                         break;
 853                 bchannel = bchannel->next;
 854         }
 855         return(bchannel);
 856 }
 857 #endif
 858
 859 struct bchannel *alloc_bchannel(unsigned long handle)
 860 {
 861         struct bchannel **bchannelp = &bchannel_first;
 862
 863         while(*bchannelp)
 864                 bchannelp = &((*bchannelp)->next);
 865
 866         *bchannelp = (struct bchannel *)malloc(sizeof(struct bchannel));
 867         if (!*bchannelp)
 868                 return(NULL);
 869         (*bchannelp)->handle = handle;
 870         (*bchannelp)->b_state = BSTATE_IDLE;
 871
 872         return(*bchannelp);
 873 }
 874
 875 void free_bchannel(struct bchannel *bchannel)
 876 {
 877         struct bchannel **temp = &bchannel_first;
 878
 879         while(*temp)
 880         {
 881                 if (*temp == bchannel)
 882                 {
 883                         *temp = (*temp)->next;
 884 #ifdef SOCKET_MISDN
 885                         if (bchannel->b_sock > -1)
 886 #else
 887                         if (bchannel->b_stid)
 888 #endif
 889                                 bchannel_destroy(bchannel);
 890                         if (bchannel->call)
 891                         {
 892                                 if (bchannel->call->bchannel)
 893                                         bchannel->call->bchannel = NULL;
 894                         }
 895                         free(bchannel);
 896                         return;
 897                 }
 898                 temp = &((*temp)->next);
 899         }
 900 }
 901
 902